JP6256760B2 - SEAL STRUCTURE, REACTOR BUILDING WITH THIS SEAL STRUCTURE, NUCLEAR POWER PLANT WITH THIS REACTOR BUILDING, AND CONSTRUCTION METHOD FOR SEAL STRUCTURE - Google Patents

Description

  The present invention relates to a seal structure, a nuclear reactor building including the seal structure, a nuclear power plant including the nuclear reactor building, and a construction method of the seal structure.

  A through-hole penetrating the inside and outside of the building is formed in a structure such as a wall portion constituting the outer wall of the building, etc., and an arrangement member is inserted into the through-hole to move the building from the indoor to the indoor or from the indoor to the outdoor. It is possible to supply and discharge such fluids. At this time, in order to prevent a flame or smoke from flowing through the through hole when a fire or the like occurs between the through hole and the arrangement member, the inner peripheral surface of the through hole and the arrangement member The seal structure which provided the fireproof sealing material in the clearance gap between outer peripheral surfaces is comprised.

  As such a seal structure, for example, in Patent Document 1, a heat insulating material such as urethane foam is wound around the arrangement member, and a thermal expansion fireproof sheet is partially wound around the periphery. Furthermore, the heat insulation sheet is wound around the thermal expansion fireproof sheet. And the method of comprising a sealing structure by inject | pouring and fixing a fireproof sealing material between an arrangement | positioning member and a through-hole is disclosed.

  Such a seal structure not only prevents the flame or gas caused by a fire from flowing through the through-hole, but even if the gap is generated again due to melting and loss of the heat insulating material due to the flame or heat. By inflating the heat-expandable fireproof sheet, the gap can be closed and inflow of flame and smoke can be prevented.

  Patent Document 2 discloses a seal structure in which a thermally expandable occlusive material is disposed as a thermally expanded refractory material on a wall surface in which a through-hole through which a long body such as an arrangement member is inserted is formed. In this seal structure, the through hole can be effectively closed so as to cover from one side of the wall surface by expanding the thermally expansible closing material arranged in contact with the wall surface instead of the inside of the through hole. Further, this seal structure has an annular holding frame made of metal or the like that accommodates a thermally expandable blocking material provided on the wall surface. The tubular holding frame is fixed to the wall surface as a mounting portion by means of preventing removal such as eyelets. As a result, the thermally expandable occluding material is fixed in contact with the wall surface.

JP 2011-122414 A JP2011-074969A

  By the way, in such a seal structure, the further improvement of fireproof time is calculated | required from the safety | security problem of an installation. However, it is difficult in terms of cost and time to remove the existing seal structure and construct a new fire-resistant seal structure. Therefore, with respect to the existing seal structure, a proposal has been made to improve the fire resistance by additionally installing a fire-resistant member so as to cover the through-hole in which the fire-resistant seal material is provided.

  However, in such a seal structure, it is difficult to fix the refractory member by adhering to the wall surface having the through hole so as to ensure the sealability because the refractory member is installed afterwards. Therefore, when a fire occurs due to an earthquake, not only the building but also the installation members vibrate greatly due to the earthquake vibration, so that the installation members to which the refractory members are fixed before the fire occurs It will move relative. As a result, the refractory member and the wall surface are separated from each other, creating a gap before a fire occurs. As a result, the flame flows beyond the refractory member to the through-hole where the refractory seal material is provided, the added refractory member cannot be operated, and the fire resistance cannot be sufficiently secured. ing.

  The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a seal structure capable of ensuring fire resistance when a gap is generated between a fire resistant member and a wall surface. .

In order to solve the above problems, the present invention proposes the following means.
The seal structure according to one aspect of the present invention includes a disposing member extending along an axis so as to pass through a hole formed in the wall, an outer peripheral surface of the disposing member, and an inner peripheral surface of the hole. A fireproof sealing material that closes the space, and a fixed portion that is fixed to the outer peripheral surface of the arrangement member on one side in the axial direction of the wall, and that is in contact with the wall and that is recessed inside from the other side in the axial direction. The fire-resistant member formed in the axial direction is provided with a fire-resistant member formed and a first thermally-expandable fire-resistant material that is provided in the recess and expands by heat. When the heat propagates to the first thermal expansion refractory material through a gap between the first thermal expansion refractory material and the wall portion, the first thermal expansion refractory material expands.

  According to the seal structure having such a configuration, the disposing member moves relative to the wall portion due to an earthquake or the like, and a gap is formed between the other side in the axial direction of the refractory member fixed to the disposing member and the wall portion. Even if it occurs, the gap can be closed by the first thermal expansion refractory material provided in the recess recessed from the other axial side of the refractory member. Specifically, the first thermally expanded refractory material provided in the recess of the refractory member can be expanded by the heat of the flame before the flame penetrates the gap and affects the refractory seal material. Thereby, the first thermally expanded refractory material is expanded in the gap, so that the gap can be reliably closed, and the fire resistance can be ensured when the gap is generated between the refractory member and the wall portion.

  The seal structure may include a second thermally expanded refractory material that is fixed in close contact with the refractory seal material so as to be accommodated in the recess and expands by heat.

  According to the seal structure of such a configuration, by fixing the second thermal expansion refractory material in close contact with the refractory seal material, when a flame has entered the gap formed between the refractory member and the wall portion, The second thermal expansion refractory material can prevent the refractory seal material from being directly exposed to the flame. As a result, without exposing the fireproof seal material directly to the flame, the first heat expansion refractory material and the second heat expansion refractory material close the gap, and the fire resistance is generated when a gap is generated between the fireproof member and the wall portion. Sex can be ensured more reliably.

  Furthermore, the sealing structure may include a heat-resistant member that is fixed in close contact with the fireproof sealing material and that is not deformed by heat.

  According to the seal structure of such a configuration, the heat-resistant sealing material that is not deformed by heat is fixed in close contact with the fire-resistant sealing material, so that the fire-resistant sealing material can be used until the first thermal expansion refractory material expands. Direct exposure to flames can be prevented. Thereby, when a gap arises between the refractory member and the wall portion, it is possible to improve the fire resistance until the gap is closed by the first thermal expansion refractory material.

  The seal structure may include a heat insulating material fixed to the outer peripheral surface of the arrangement member, and the fireproof member may be fixed to the outer peripheral surface of the arrangement member via the heat insulating material.

  According to the seal structure having such a configuration, the fire-resistant member is fixed to the outer peripheral surface of the arrangement member through the heat insulating material fixed to the outer peripheral surface of the arrangement member, so that it is arranged when a fire or the like occurs. It is possible to prevent heat from being transmitted through the member. That is, it is possible to prevent heat from being transmitted to the first thermally expanded refractory material through the arrangement member. Therefore, the first thermal expansion member can be reacted only with the heat of the flame that has entered the gap between the refractory member and the wall portion. As a result, the first thermal expansion member can be surely expanded by the heat of the flame or the like with respect to the flame that has entered the gap, so that the gap is surely secured when a gap is generated between the refractory member and the wall. Can be occluded.

  Furthermore, the seal structure according to another aspect of the present invention includes a disposing member extending along the axis so as to pass through the hole formed in the wall, an outer peripheral surface of the disposing member, and an inner periphery of the hole A refractory sealing material that closes a space between the surface and a refractory member that is fixed to an outer peripheral surface of the arrangement member on one side in the axial direction of the wall portion, and that is in contact with the wall portion and has a gap formed inside. And a first thermal expansion refractory material that is provided in the gap portion and expands by heat, and a dropout prevention portion that suppresses the first thermal expansion refractory material from dropping from the opening on the other side in the axial direction in the gap portion. And the heat is transmitted to the first thermally expanded refractory material through a gap between the refractory member and the wall formed by the relative movement of the arrangement member and the wall in the axial direction. Thus, the first thermal expansion refractory material expands.

  According to the seal structure having such a configuration, the disposing member moves relative to the wall portion due to an earthquake or the like, and a gap is formed between the other side in the axial direction of the refractory member fixed to the disposing member and the wall portion. Even if it occurs, the gap can be closed by the first thermal expansion refractory material provided in the gap of the refractory member. Specifically, the first thermally expanded refractory material provided in the gap of the refractory member can be expanded by the heat of the flame before the flame penetrates the gap and affects the refractory seal material. Furthermore, by providing a drop-off prevention part that suppresses the drop-off of the first thermal expansion refractory material at the opening of the gap, the first thermal expansion refractory material jumps out of the gap and falls when a gap occurs. Can be prevented. Therefore, even if the arrangement member moves relative to the wall portion due to an earthquake or the like, and the gap is formed between the surface on the other side in the axial direction of the fireproof member and the surface of the wall portion, the first thermal expansion refractory material is dropped off. Without making it, it can be expanded toward the gap while remaining in the gap. Thus, the gap can be closed by expanding the first thermally expanded refractory material in the gap, and when the gap is generated between the fireproof member and the wall portion, the fire resistance can be ensured with high accuracy. .

  Further, in the seal structure, a support hole portion is formed in which the drop-off prevention portion is disposed in contact with the other axial side of the refractory member and penetrates to the opening, and the first thermal expansion refractory material is You may have the supporting member supported toward an axial direction one side.

  According to the seal structure having such a configuration, the first thermal expansion refractory material is supported by the support member, and the open state is maintained without closing the opening by the support hole. Therefore, even if the arrangement member moves relative to the wall portion due to an earthquake or the like and a gap is generated between the fireproof member and the wall portion, the first heat Do not drop the expanded refractory material. Furthermore, when heat propagates to the first thermal expansion refractory material and expands, the support hole portion is provided to inhibit the first thermal expansion refractory material from expanding toward the gap. Absent. As a result, when a gap is generated between the refractory member and the wall portion, it is possible to easily ensure the fire resistance with high accuracy without dropping the first thermally expanded refractory material from the gap portion.

  Furthermore, in the said sealing structure, the said drop-off prevention part may include forming the said space | gap part by reducing in diameter as it goes to the said axial direction other side.

  According to the seal structure having such a configuration, the opening can be narrower than the space on one side in the axial direction of the gap. Therefore, even when it vibrates in the axial direction due to vibration such as an earthquake, the movement of the first thermal expansion refractory material from the opening to the other side in the axial direction can be inhibited, and the first thermal expansion refractory material is dropped into the gap. There is nothing. Further, when heat propagates to the first thermally expanded refractory material and expands, the opening is narrowed and not closed, so the first thermally expanded refractory material expands toward the gap. There is no hindrance to doing. As a result, when a gap is generated between the refractory member and the wall portion, it is possible to easily ensure the fire resistance with high accuracy without dropping the first thermally expanded refractory material from the gap portion.

  Moreover, in the said sealing structure, the said drop-off prevention part may have a protrusion part which protrudes in a radial direction toward the said 1st thermal expansion refractory material in the said space | gap part.

  According to the seal structure having such a configuration, the protruding portion can be caught and caught in the first thermal expansion refractory material to fix the position. Therefore, even if it is a case where it vibrates in the axial direction due to vibration such as an earthquake, the protruding portion can be caught by the first thermal expansion refractory material and hinder the movement in the axial direction, and the first thermal expansion refractory material will not fall into the gap . Furthermore, when heat propagates to the first thermally expanded refractory material and expands, the opening is opened, so that the first thermally expanded refractory material does not hinder expansion toward the gap. As a result, when a gap is generated between the refractory member and the wall portion, it is possible to easily ensure the fire resistance with high accuracy without dropping the first thermally expanded refractory material from the gap portion.

  Furthermore, in the said sealing structure, the said drop-off prevention part may be equipped with the obstruction | occlusion part which obstruct | occludes the said opening part, and the said obstruction | occlusion part may open | release the said opening part by receiving heat.

  According to the sealing structure having such a configuration, the opening can be closed without hindering the first thermally expanded refractory material from expanding by opening the opening by receiving heat. The thermal expansion refractory material can be prevented from jumping out of the gap.

  Moreover, the reactor building in the other aspect of this invention is provided with the said seal structure.

  Furthermore, a nuclear power plant according to another aspect of the present invention includes the nuclear reactor building.

  Furthermore, the construction method of the seal structure according to another aspect of the present invention includes a disposing member extending along an axis so as to pass through a hole formed in the wall, an outer peripheral surface of the disposing member, and the hole A sealing material that closes the space with the inner peripheral surface of the wall member, and is fixed to the outer peripheral surface of the arrangement member on one side in the axial direction of the wall, and is in contact with the wall and inward from the other side in the axial direction. A construction method of a seal structure comprising a fireproof member having a recessed recess and a first thermally expanded refractory material provided in the recess and expanded by heat, wherein the first thermal expansion is provided in the recess of the fireproof member. A thermal expansion refractory material fixing step in which a plurality of refractory materials are laminated and fixed in a radial direction; and after the thermal expansion refractory material fixation step, a band member is wound from the radial outer side to the circumferential direction of the refractory member to form the refractor The outer peripheral surface of the arrangement member And a refractory member fixing step of fixing.

  According to the construction method of the seal structure of such a process, the fire-resistant member which provided the 1st thermal expansion refractory material in the recessed part can be easily installed in an arrangement | positioning member.

  According to the seal structure of the present invention, the first thermal expansion member is provided in the recess of the refractory member so that the gap is closed by the first thermal expansion refractory material, and even if a gap is generated between the refractory member and the wall surface, the fire resistance is increased. Sex can be secured.

It is sectional drawing which shows the seal structure which concerns on 1st embodiment of this invention. It is sectional drawing which shows the state which the seal structure which concerns on 1st embodiment of this invention moved relatively. It is sectional drawing which shows the state which the 1st thermal expansion refractory material of the seal structure which concerns on 1st embodiment of this invention expanded. It is sectional drawing which shows the seal structure which concerns on 2nd embodiment of this invention. It is sectional drawing which shows the state which the seal structure which concerns on 2nd embodiment of this invention moved relatively. It is sectional drawing which shows the state which the 2nd thermal expansion refractory material of the seal structure which concerns on 2nd embodiment of this invention expanded. It is sectional drawing which shows the state which the 1st thermal expansion refractory material of the seal structure which concerns on 2nd embodiment of this invention expanded. It is sectional drawing which shows the seal structure which concerns on 3rd embodiment of this invention. It is sectional drawing which shows the state which the seal structure which concerns on 3rd embodiment of this invention moved relatively. It is sectional drawing which shows the state which the 1st thermal expansion refractory material of the seal structure which concerns on 3rd embodiment of this invention expanded. It is sectional drawing which shows the seal structure which concerns on 4th embodiment of this invention. It is a perspective view which shows the thermal expansion refractory material fixing process of the construction method of the seal structure which concerns on 4th embodiment of this invention. It is a perspective view which shows the fireproof member fixing process of the construction method of the seal structure which concerns on 4th embodiment of this invention. It is sectional drawing which shows the seal structure which concerns on the modification of this invention. It is sectional drawing which shows the seal structure in 5th embodiment of this invention. It is a perspective view which shows the drop-off prevention part in 5th embodiment of this invention. It is sectional drawing which shows the state which the seal structure in 5th embodiment of this invention moved relatively. It is sectional drawing which shows the state which the thermal expansion refractory material of the seal structure in 5th embodiment of this invention expanded. It is sectional drawing which shows the seal structure in 6th embodiment of this invention. It is sectional drawing which shows the state which the seal structure in 6th embodiment of this invention moved relatively. It is sectional drawing which shows the seal structure in 7th embodiment of this invention. It is sectional drawing which shows the drop-off prevention part in 7th embodiment of this invention, The figure (a) is sectional drawing in the AA cross section of FIG. 21, The same figure (b) is sectional drawing in the BB cross section of FIG. It is. It is sectional drawing which shows the state which the seal structure in 7th embodiment of this invention moved relatively. It is sectional drawing which shows the seal structure in 8th embodiment of this invention. It is a perspective view which shows the drop-off prevention part in 8th embodiment of this invention. It is sectional drawing which shows the state which the thermal expansion refractory material of the seal structure in 8th embodiment of this invention expanded. It is sectional drawing which shows the seal structure in the 1st modification of 8th embodiment of this invention. It is a perspective view which shows the drop-off prevention part in the 1st modification of 8th embodiment of this invention. It is sectional drawing which shows the seal structure in the 2nd modification of 8th embodiment of this invention. It is a perspective view which shows the drop-off prevention part in the 2nd modification of 8th embodiment of this invention.

Hereinafter, a first embodiment according to the present invention will be described with reference to FIG.
As shown in FIG. 1, the seal structure 1 of the first embodiment is a structure having a hole 13 by forming a wall of a reactor building or the like containing a nuclear reactor, a turbine facility, or the like in a nuclear power plant. A space between the wall 10, the disposing member 2 inserted through the hole 13 from one side to the other side in the axis O direction of the wall of the reactor building or the like, and the space between the hole 13 and the disposing member 2 And a refractory sealing material 3 that is closed. Further, the seal structure 1 includes a fireproof member 5 that is disposed on one side of the axis O direction with respect to the fireproof sealant 3 in the hole 13 and has a recess (gap) 51 that is recessed from the other side of the axis O direction. A first thermal expansion refractory material 6 provided in the recess 51 of the member 5 and a band member 7 for fixing the refractory member 5 to the arrangement member 2 from the radially outer side are provided.

  Here, in the present embodiment, the side on which the fireproof member 5 is provided with respect to the wall portion 10 and the side on which the fire is assumed to occur with respect to the wall portion 10 is the one side in the axis O direction (FIG. 1). The side on which the fireproof member 5 is not provided with respect to the wall portion 10 is the other side in the axis O direction (the right side in FIG. 1).

The wall 10 has a front surface 11 extending along the vertical plane facing the one side in the axis O direction, a back surface 12 extending along the vertical plane facing the other side in the axis O direction, and a back surface extending from the front surface 11. A through-hole (hole) 13 (hereinafter simply referred to as a through-hole 13), which is a hole 13 formed so as to pass through the wall 10 in a circular shape centering on the axis O toward 12, is formed. Has been.
The disposing member 2 extends along the axis O so as to pass through the through hole 13 from one side of the axis O direction to the other side of the axis O direction. In the present embodiment, the disposing member 2 is provided with a pipe extending in a cylindrical shape with the axis O as the center.

The fireproof sealing material 3 is filled in a space between the outer peripheral surface of the disposing member 2 and the inner peripheral surface of the through hole 13, and the surface 11 of the wall 10 that is one side of the through hole 13 in the axis O direction. The opening on the side is sealed and filled from the surface 11 side to the central portion of the through hole 13 in the axis O direction. That is, the refractory sealing material 3 is bonded and fixed to the outer peripheral surface of the arrangement member 2 and the inner peripheral surface of the through hole 13, and closes the space between the arrangement member 2 and the through hole 13. .
In addition, the fireproof sealing material 3 used by this embodiment should just use a well-known architectural sealing material.

The heat insulating material 4 is wound around the outer peripheral surface of the arrangement member 2 in the circumferential direction via the first heat insulating material 41 wound around the outer peripheral surface of the arrangement member 2 and the first heat insulating material 41. And a second heat insulating material 42.
The first heat insulating material 41 has a sheet shape, and is wound around and fixed to the outer peripheral surface of the arrangement member 2 from the surface 11 of the wall portion 10 toward one side in the axis O direction.
The second heat insulating material 42 has a sheet shape and is wound around the outer peripheral surface of the arrangement member 2 in the circumferential direction so as to overlap the first heat insulating material 41 on one side in the axis O direction with respect to the fireproof member 5 described later. Being fixed.
The first heat insulating material 41 and the second heat insulating material 42 are preferably a heat insulating material or a heat insulating material that covers a commercially available pipe, such as a foamed plastic heat insulating material such as foamed polyethylene.

  The refractory member 5 is fixed to the outer peripheral surface of the arrangement member 2 at the surface 11 on one side of the wall portion 10 in the axis O direction, and comes into close contact with the surface 11 of the wall portion 10 and the refractory sealing material 3. The refractory member 5 is formed with a recess 51 that is recessed from the other side in the axis O direction on the radially inner side. The refractory member 5 is provided with a hole that passes through the axis O and has a cylindrical shape extending along the direction of the axis O, and can be divided on a plane that passes through the axis O. The refractory member 5 is formed with a recess 51 that is circular in cross section around the axis O and is recessed from the other side of the axis O direction. As the refractory member 5 used in the present embodiment, a heat insulating futon used for piping is preferable. For example, Siltex (registered trademark) whose outer side is silica cloth is used to fiberize and laminate an alumina silica-based raw material inside. And the like filled with fine flex (registered trademark).

  The first thermally expanded refractory material 6 is provided in the recess 51 of the refractory member 5 and expands when the heat of the flame propagates. The first thermal expansion refractory material 6 used in the present embodiment has a putty shape like clay, and is packed in the recess 51. The first thermal expansion refractory material 6 may be packed in a certain amount uniformly in the recess 51 and may be packed in the recess 51 without a gap, but does not necessarily have to be packed in the recess 51 without a gap. . As shown in FIG. 1, the first thermal expansion refractory material 6 of the present embodiment is packed in such an amount that gaps are generated at the four corners of the recess 51 in the cross-sectional shape. The first thermal expansion refractory material 6 used in the present embodiment is a thermal expansion refractory material that expands at least twice as much as heat propagates at 200 ° C. to 300 ° C. like a flame, for example, Examples include fire shut putty FSP and heat melt silence.

  The band member 7 fixes the divided refractory member 5 to the arrangement member 2 from the outside in the radial direction. Specifically, the band member 7 is a band-shaped material that does not deform even when exposed to a high temperature for a long time, and is arranged so as not to separate the refractory member 5 by winding it around the outer peripheral surface of the refractory member 5 in the circumferential direction. It is fixed to the outer peripheral surface of the installation member 2.

Next, the operation of the seal structure 1 according to the first embodiment having the above configuration will be described.
In the sealing structure 1 of the first embodiment as described above, as shown in FIG. 1, the space between the disposing member 2 and the through hole 13 is filled with the fireproof sealing material 3 and closed without a gap. And the fireproof member 5 which provided the 1st thermal expansion fireproof material 6 in the recessed part 51 is arrange | positioned in contact with the surface 11 of the wall part 10 so that it may contact | adhere without a gap. The refractory member 5 is fixed to the outer peripheral surface of the arrangement member 2 when the band member 7 is wound radially outward.
However, as shown in FIG. 2, when a fire due to an earthquake occurs, the disposing member 2 vibrates due to the earthquake and moves relative to the wall portion 10. When the disposing member 2 moves relative to the wall portion 10, the refractory member 5 also moves together with the disposing member 2, and the surface 11 of the wall portion 10 and the surface on the other side in the axis O direction of the refractory member 5 are separated from each other. Thus, a gap G is formed.

  Thereafter, in a state where a gap G is formed between the refractory member 5 and the surface 11 of the wall 10, a fire occurs on one side in the axis O direction facing the surface 11 of the wall 10, and the flame enters the gap G. Begin to invade. Here, since the concave portion 51 of the refractory member 5 is concave from the other side in the direction of the axis O, the first thermally expanded refractory material 6 provided in the concave portion 51 is exposed to the flame that has entered the gap G. Therefore, the heat by the flame that has entered the gap G propagates to the first thermally expanded refractory material 6 provided in the recess 51 of the refractory member 5, and the first thermally expanded refractory material 6 starts to expand.

  As shown in FIG. 3, the first thermally expanded refractory material 6 that has started to expand proceeds while expanding in the gap G along the wall portion 10. Then, the first thermal expansion refractory material 6 expands in the gap G, so that the gap G between the wall 10 and the refractory member 5 is closed, and fire or heat reaches the refractory seal material 3 and is damaged. The influence is prevented.

  According to the seal structure 1 as described above, the disposing member 2 moves relative to the wall portion 10 due to an earthquake or the like, and the other side of the refractory member 5 fixed to the outer peripheral surface of the disposing member 2 in the axis O direction. Even if the gap G is generated between the surface and the surface 11 of the wall portion 10, the gap G is closed by the first thermal expansion refractory material 6 provided in the recess 51 that is recessed from the other side in the axis O direction of the refractory member 5. Can do. Specifically, before the flame or heat enters the gap G and reaches the refractory seal material 3 to cause damage, the heat of the flame propagates and is provided in the recess 51 of the refractory member 5. The first thermally expanded refractory material 6 can be expanded. Thus, the gap G can be reliably closed by expanding the first thermally expanded refractory material 6 in the gap G, and the fire resistance is improved when the gap G is generated between the refractory member 5 and the wall portion 10. Can be secured.

  Further, by fixing the refractory member 5 to the outer peripheral surface of the disposing member 2 via the first heat insulating material 41 fixed to the outer peripheral surface of the disposing member 2, when the fire occurs, the disposing member 2 is interposed. Heat can be prevented. That is, it is possible to prevent heat from being transmitted to the first thermal expansion refractory material 6 through the arrangement member 2 by the first heat insulating material 41 that is the heat insulating material 4. Therefore, the first thermally expanded refractory material 6 can be reacted only with the heat of the flame that has entered the gap G generated between the surface on the other side in the axis O direction of the refractory member 5 and the surface 11 of the wall portion 10. Thereby, since the first thermally expanded refractory material 6 can be reliably expanded by the heat of the flame that has entered the gap G, the gap G is generated when the gap G is generated between the refractory member 5 and the wall portion 10. Can be reliably closed.

  Furthermore, by providing the first heat insulating material 41 and the second heat insulating material 42 so as to overlap each other on the one side in the axis O direction of the refractory member 5, it is more possible that heat is transmitted from the one side in the axis O direction through the disposing member 2. It can be surely prevented. Thereby, the first thermal expansion refractory material 6 can be expanded by the heat of the flame or the like with respect to the flame that has entered the gap G, and the gap G can be more reliably closed.

Next, the seal structure 1a of the second embodiment will be described with reference to FIG.
In the second embodiment, the same components as those in the first embodiment are given the same reference numerals, and detailed description thereof is omitted. The seal structure 1a of the second embodiment is different from the first embodiment in that it has a second thermal expansion refractory material 8 that is fixed in close contact with the refractory seal material 3.

  That is, as shown in FIG. 4, the seal structure 1 a of the second embodiment has a first thermal expansion refractory material in close contact with the first thermal expansion refractory material 6 and the refractory seal material 3 in the recess 51 of the refractory member 5. 6 and a second thermal expansion refractory material 8 disposed on the other side in the axis O direction.

The second thermal expansion refractory material 8 has a ring shape in which the cross-sectional shape orthogonal to the direction of the axis O is the same shape as the recess 51, has a sheet shape, and is formed so as to fit in the recess 51. The second thermal expansion refractory material 8 is fixed in close contact with the refractory seal material 3 and the surface 11 of the wall portion 10. That is, by fixing the refractory member 5 to the arrangement member 2 so as to be in contact with the surface 11 of the wall portion 10, the second thermal expansion refractory material 8 is covered with the refractory member 5 and disposed so as to be accommodated in the recess 51. ing. The second thermal expansion refractory material 8 is made of a thermally expandable refractory material that expands when heat propagates. As the 2nd thermal expansion refractory material 8 used by this embodiment, a commercially available thermal expansion sheet should just be used.
The temperature at which the second thermal expansion refractory material 8 expands is not particularly defined. For example, the second thermal expansion refractory material 8 may expand at a temperature equivalent to that of the first thermal expansion refractory material 6. It may expand at a high temperature or a low temperature.

Next, the operation of the seal structure 1a of the second embodiment having the above configuration will be described.
In the seal structure 1a of the second embodiment as described above, as in the first embodiment, when a fire due to an earthquake occurs, the arrangement member 2 vibrates due to the vibration of the earthquake as shown in FIG. Move relative to 10. When the disposing member 2 moves relative to the wall portion 10, the refractory member 5 also moves together with the disposing member 2, and the surface 11 of the wall portion 10 and the surface on the other side in the axis O direction of the refractory member 5 are separated from each other. To do. At this time, since the second thermal expansion refractory material 8 is fixed in close contact with the refractory sealing material 3 and the surface 11 of the wall portion 10, only the second thermal expansion refractory material 8 is not separated from the surface 11 of the wall portion 10. . That is, a gap G is formed between the refractory member 5 and the second thermal expansion refractory material 8.

  Thereafter, in a state where a gap G is formed between the fireproof member 5 and the surface 11 of the wall portion 10, a fire occurs on one side in the axis O direction facing the surface 11 of the wall portion 10, and Flame and heat begin to enter the gap G between the two thermally expanded refractory material 8. Here, since the second thermal expansion refractory material 8 is closely attached and fixed to the refractory sealing material 3, the first thermal expansion refractory material 6 and the refractory sealing material 3 are not directly exposed to the invading flame. The second thermal expansion refractory material 8 is exposed to flame and heat. And any one of the 1st thermal expansion refractory material 6 and the 2nd thermal expansion refractory material 8 starts expansion | swelling. In the present embodiment, as shown in FIG. 6, heat from the flame that has entered the gap G propagates, and the second thermally expanded refractory material 8 starts to expand first. The second thermally expanded refractory material 8 that has started to expand proceeds while expanding in the gap G along the wall portion 10, and the gap G between the second thermally expanded refractory material 8 fixed to the wall portion 10 and the refractory member 5. Occlude.

  And if a fire continues further, the 2nd thermal expansion refractory material 8 will burn out and the gap G will produce again, and the heat | fever by a flame, etc. will reach the 1st thermal expansion refractory material 6 provided in the recessed part 51 of the refractory member 5 etc. It is transmitted. Therefore, as shown in FIG. 7, the first thermal expansion refractory material 6 starts to expand, and proceeds while expanding in the gap G along the wall portion 10. Then, the first thermal expansion refractory material 6 expands in the gap G, so that the gap G between the wall 10 and the refractory member 5 is continuously closed, and fire and heat from the fire reach the refractory seal material 3 and are damaged. It is prevented from giving such an influence.

  According to the sealing structure 1a as described above, the second thermal expansion refractory material 8 is fixed so as to be in close contact with the refractory seal material 3, so that the surface on the other side in the axis O direction of the refractory member 5 and the surface 11 of the wall portion 10 are fixed. When the flame enters the gap G generated between the two, the second thermal expansion refractory material 8 can prevent the refractory seal material 3 from being directly exposed to the flame and heat. Accordingly, the gap G is closed by the first thermal expansion refractory material 6 and the second thermal expansion refractory material 8 without directly exposing the refractory seal material 3 to flame or heat. When the gap G is generated, the fire resistance can be ensured more reliably.

  Moreover, the 2nd thermal expansion refractory material 8 can be expanded more rapidly by making the expansion | swelling start temperature of the 2nd thermal expansion refractory material 8 lower than the 1st thermal expansion refractory material 6. FIG. Therefore, the gap G between the surface on the other side in the axis O direction of the refractory member 5 and the surface 11 of the wall portion 10 can be closed by the second thermal expansion refractory material 8. And even if a fire continues and the 2nd thermal expansion refractory material 8 burns, the gap | interval G can be block | closed by the 2nd thermal expansion refractory material 8 again. Accordingly, the gap G can be closed without exposing the fireproof sealing material 3 directly to the flame for a long time, and fire resistance can be ensured for a long time.

Next, the seal structure 1b of the third embodiment will be described with reference to FIG.
In the third embodiment, the same components as those in the first embodiment and the second embodiment are given the same reference numerals, and detailed description thereof is omitted. The seal structure 1b of the third embodiment is different from the first embodiment and the second embodiment in that it has a heat-resistant member 9 that is fixed in close contact with the fireproof sealing material 3.

  That is, as shown in FIG. 8, the seal structure 1 b of the third embodiment is in close contact with the fireproof seal material 3 in the recess 51 of the fireproof member 5 and on the other side in the axis O direction than the first thermally expanded fireproof material 6. A heat-resistant member 9 is provided.

  The heat-resistant member 9 is a heat-resistant board material that is not deformed by heat in which a cross-sectional shape orthogonal to the direction of the axis O forms a plate shape that is the same shape as the recess 51. The heat-resistant member 9 used in the present embodiment is made of a material having heat resistance that does not change its shape even when exposed to a high temperature of at least 200 ° C. for several hours, and is not commercially deformable due to heat. Is used. The heat-resistant member 9 is fixed so as to be in close contact with the fire-resistant sealing material 3 and cover the entire surface of the fire-resistant sealing material 3.

Next, the operation of the seal structure 1b of the third embodiment having the above configuration will be described.
In the seal structure 1b of the third embodiment as described above, as in the first embodiment, when a fire due to an earthquake occurs, the arrangement member 2 vibrates due to the vibration of the earthquake as shown in FIG. It moves relative to the part 10. When the disposing member 2 moves relative to the wall portion 10, the refractory member 5 also moves together with the disposing member 2, and the surface 11 of the wall portion 10 and the surface on the other side in the axis O direction of the refractory member 5 are separated from each other. To do. At this time, since the heat-resistant member 9 is fixed in close contact with the fireproof sealing material 3 and the surface 11 of the wall portion 10, only the heat-resistant member 9 is not separated from the surface 11 of the wall portion 10. That is, the gap G is formed so that a space is formed between the refractory member 5 and the heat-resistant member 9.

  Thereafter, in the state where the gap G is formed between the refractory member 5 and the surface 11 of the wall 10, if a fire occurs on one side in the axis O direction facing the surface 11 of the wall 10, Flame and heat begin to enter the gap G between the members 9. Here, the heat-resistant member 9 is closely attached and fixed to the refractory seal material 3, so that the invading flame and heat are not directly exposed to the refractory seal material 3, and the first thermal expansion refractory material 6 is flame and heat. Exposed to.

  And the heat | fever by a flame, etc. are transmitted to the 1st thermal expansion refractory material 6 provided in the recessed part 51 of the refractory member 5. FIG. Therefore, as shown in FIG. 10, the first thermally expanded refractory material 6 starts to expand, and proceeds while expanding in the gap G along the wall portion 10. Then, the first thermal expansion refractory material 6 expands in the gap G, so that the gap G between the wall portion 10 and the refractory member 5 is continuously closed, and the fire and heat from the fire reach the refractory seal material 3. Is prevented.

  According to the seal structure 1b as described above, the heat-resistant member 9 that is not deformed by heat is fixed in close contact with the fire-resistant seal material 3, so that the surface of the fire-resistant member 5 on the other side in the axis O direction and the wall portion 10 are fixed. A gap G is formed between the refractory sealing material 3 and the refractory sealant 3 directly exposed to the flame or heat until the first thermally expanded refractory material 6 expands even if flame or heat enters the gap G. Can be prevented. Therefore, the refractory sealing material 3 is protected even if it takes some time before the first thermal expansion refractory material 6 expands. Accordingly, when the gap G is generated between the surface on the other side in the axis O direction of the refractory member 5 and the surface 11 of the wall portion 10, the fire resistance until the gap G is closed by the first thermal expansion refractory material 6 is achieved. Can be improved.

Next, the seal structure 1c of the fourth embodiment will be described with reference to FIG.
In the fourth embodiment, the same reference numerals are given to the same components as those in the first embodiment to the third embodiment, and detailed description thereof is omitted. The seal structure 1c of the fourth embodiment to the third embodiment is different from the first embodiment with respect to the shape of the first thermal expansion refractory material 6.

That is, in the seal structure 1c of the fourth embodiment, as shown in FIG. 11, a rectangular first thermal expansion refractory material 61 having a strip shape as the first thermal expansion refractory material 6 is radially formed in the recess 51 of the refractory member 5. Multiple layers are stacked and fixed.
The rectangular first thermal expansion refractory material 61 has a strip shape and is made of the same material as the first thermal expansion refractory material 6. The rectangular first thermal expansion refractory material 61 is disposed along the inner peripheral surface of the recess 51 so that the longitudinal direction of the strip is along the circumferential direction and the thickness direction is directed in the radial direction. The rectangular first thermal expansion refractory material 61 is laminated and spread on the recesses 51 of the refractory member 5 over five rows in the radial direction and three rows in the axis O direction.
The rectangular first thermal expansion refractory material 61 may be a commercially available thermal expansion refractory material in the form of a sheet.

Here, the construction method of the seal structure 1c of the fourth embodiment will be described.
In the construction method of the seal structure 1c of the fourth embodiment, the hole 13 and the disposing member are arranged with respect to the disposing member 2 in which the first heat insulating material 41 inserted through the hole 13 of the wall 10 is wound around the outer peripheral surface. 2 is applied to the existing seal structure 1c in which the space between the two is closed by the fireproof sealing material 3.
The construction method of the seal structure 1c of the fourth embodiment includes a thermal expansion refractory material fixing step S1 in which a plurality of rectangular first thermal expansion refractory materials 61 are stacked and fixed in the recess 51 of the refractory member 5 in the radial direction, and the refractory member 5 A refractory member fixing step S <b> 2 for fixing the refractory member 5 to the outer peripheral surface of the arrangement member 2 by winding the band member 7 from the radially outer side to the peripheral direction.

  In the thermal expansion refractory material fixing step S1, as shown in FIG. 12, a plurality of rectangular first thermal expansion refractory materials 61 are stacked along the inner peripheral surface of the concave portion 51 of the semi-cylindrical refractory member 5 formed with the concave portion 51. Then lay down. That is, the refractory member 5 having a cylindrical shape extending through the direction of the axis O provided with a hole penetrating about the axis O is divided into two and has a semicircular cross section around the axis O. Accordingly, a recessed portion 51 is formed to be recessed from the surface on the other side in the axis O direction. Therefore, a rectangular first thermal expansion refractory material 61 is pasted along the inner peripheral surface of the recessed portion 51 of the divided refractory member 5. In the thermal expansion refractory material fixing step S1, a plurality of rectangular first thermal expansion refractory materials 61 are stacked and fixed sequentially in five layers from the inner peripheral surface of the recess 51 toward the inside in the radial direction and three layers along the axis O direction. The recess 51 is laid down.

  As shown in FIG. 13, the refractory member fixing step S <b> 2 is a member in which the refractory member 5 in which the rectangular first thermal expansion refractory material 61 is spread in the recess 51 is disposed by the band member 7 after the thermal expansion refractory material fixing step S <b> 1. Fix to 2. Specifically, in the refractory member 5 to which the rectangular first thermal expansion refractory material 61 is fixed, the hole 13 side of the refractory member 5 which is a divided side faces the axis O, and the concave portion 51 centering on the arrangement member 2. Is arranged so as to face the other side of the axis O direction which is the surface 11 of the wall portion 10. And in the position where the surface by which the recessed part 51 of the fireproof member 5 is provided touches the surface 11 of the wall part 10, the two divided fireproof members 5 are match | combined over the circumferential direction from the radial direction outer side of the fireproof member 5. The band member 7 is wound. And the fireproof member 5 is fixed to the outer peripheral surface of the arrangement | positioning member 2 by bonding the both ends of the band member 7 together.

  In the seal structure 1c of the fourth embodiment as described above, by using the rectangular first thermal expansion refractory material 61 as the first thermal expansion refractory material 6, a small rectangular first heat is formed in the recessed portion 51 of the divided refractory member 5. By sticking the expanded refractory material 61, the first thermally expanded refractory material 6 can be spread. And since the rectangular 1st thermal expansion refractory material 61 expands several times with heat, it is not necessary to spread | lay the rectangular 1st thermal expansion refractory material 61 laminated | stacked without gap, and can spread easily. Thereby, the refractory member 5 in which the first thermal expansion refractory material 6 is provided in the recess 51 can be easily installed in the arrangement member 2.

The present invention is not limited to the first to fourth embodiments, and various modifications are allowed without departing from the scope of the invention. For example, as a modification of the first embodiment to the fourth embodiment, there is a structure in which the refractory member 5 is directly fixed without fixing the heat insulating material 4 to the arrangement member 2.
That is, in the seal structure 1d of the modified example, the heat insulating material 4 is not wound around the arrangement member 2 as shown in FIG. The fireproof member 5 is directly fixed to the outer peripheral surface of the arrangement member 2. The recess 51 formed in the refractory member 5 is formed with a deformed recess 510 different from the recess 51 of the first embodiment.
Unlike the recessed portion 51, the deformed recessed portion 510 is recessed in a ring shape centering on the axis O from the other surface in the direction of the axis O. That is, the deformed recess 510 is formed so that the refractory member 5 remains on both the radially outer side and the inner side of the refractory member 5.

  By adopting such a structure, even if the refractory member 5 provided with the first thermal expansion refractory material 6 is installed on the arrangement member 2 around which the heat insulating material 4 is not wound, the heat transmitted from the arrangement member 2 It can prevent that the 1st thermal expansion refractory material 6 expands accidentally. Thereby, the first thermally expanded refractory material 6 can be reacted only by the heat of the flame entering through the gap G, and when the gap G is generated between the refractory member 5 and the wall portion 10, the gap is surely obtained. G can be closed to ensure fire resistance.

Next, the seal structure 1e of the fifth embodiment will be described with reference to FIG.
In the fourth embodiment, the same components as those in the first embodiment to the fourth embodiment are given the same reference numerals, and detailed description thereof is omitted. The seal structure 1e of the fourth embodiment is different from the first embodiment to the fourth embodiment in that it has a dropout prevention portion 20 that suppresses the dropout of the first thermal expansion refractory material 6.

  That is, the seal structure 1e of the fourth embodiment includes a drop-off prevention part 20 that suppresses the drop of the first thermal expansion refractory material 6 from the opening 51a on the other side in the axis O direction in the recess (gap part) 51. .

  The drop-off prevention unit 20 is disposed so as to be in contact with the other side of the fireproof member 5 in the axis O direction and cover the opening 51a of the recess 51. The drop-off prevention unit 20 includes a support member 21 that supports the first thermally expanded refractory material 6 toward one side in the axis O direction at the opening 51a.

  As shown in FIG. 16, the support member 21 has a net shape so as to divide the opening 51a into a plurality of parts. The support member 21 is formed with a plurality of small openings as support holes 213c penetrating to the openings 51a in a net shape. Specifically, the support member 21 includes an outer peripheral annular portion 211 fixed to the refractory member 5, an inner peripheral annular portion 212 disposed inside the outer peripheral annular portion 211, an outer peripheral annular portion 211, and an inner peripheral annular portion 212. And a net portion 213 disposed between the two.

  The outer peripheral annular portion 211 is fixed in contact with the other side of the refractory member 5 in the axis O direction, and has a ring shape centered on the axis O. The outer peripheral annular portion 211 in the present embodiment is disposed at a position sandwiched between the other side in the axis O direction of the refractory member 5 and the surface 11 of the wall portion 10. The outer peripheral annular portion 211 has a ring shape in which the inner periphery is larger in the radial direction than the opening 51 a of the recess 51. That is, the outer peripheral annular portion 211 is disposed on the radially outer side of the opening 51a so as not to close the opening 51a.

  The inner peripheral annular portion 212 is disposed in contact with the outer peripheral surface of the arrangement member 2 and has a ring shape with the axis O as the center. The inner peripheral annular portion 212 in the present embodiment is disposed at a position sandwiched between the other side in the axis O direction of the first heat insulating material 41 and the surface 11 of the wall portion 10. The inner peripheral annular portion 212 has a ring shape whose outer periphery is smaller in the radial direction than the opening 51 a of the recess 51. That is, the inner peripheral annular portion 212 is disposed radially inward of the opening 51a so as not to close the opening 51a.

  The net part 213 is formed in a net shape between the outer peripheral annular part 211 and the inner peripheral annular part 212 in a radial direction so as to cover the opening 51a of the recess 51 from the other side in the axis O direction. The net part 213 is formed of a wire. The net part 213 has a plurality of weft yarn parts 213 a arranged concentrically and a plurality of warp yarn parts 213 b arranged radially from the inner circumferential annular part 212 toward the outer circumferential annular part 211. The net part 213 forms a net shape that forms a support hole part 213c penetrating to the opening 51a by a plurality of weft parts 213a and warp part 213b.

  A plurality of weft portions 213a are formed in a circular shape around the axis O. In the present embodiment, the weft portions 213a are arranged at equal intervals in the radial direction between the outer periphery of the inner peripheral annular portion 212 and the inner periphery of the outer peripheral annular portion 211. Specifically, the weft portion 213a is formed in two stages around the axis O in a concentric circle shape. Here, the inner weft portion 213a on the inner peripheral annular portion 212 side is defined as a first weft portion, and the outer weft portion 213a on the outer peripheral annular portion 211 side is defined as a second weft portion. That is, the weft portion 213a forms a first layer space between the outer periphery of the inner peripheral annular portion 212 and the first weft portion, and the second layer between the first weft portion and the second weft portion. And a third layer space is formed between the second weft portion and the inner periphery of the outer peripheral annular portion 211.

  A plurality of warp yarn portions 213b are arranged radially about the axis O. In the present embodiment, the warp portion 213b is a first layer space between the outer periphery of the inner peripheral annular portion 212 and the first weft portion, or a second layer between the first weft portion and the second weft portion. And the third layer space between the second weft portion and the inner periphery of the outer peripheral annular portion 211 are arranged at equal intervals in the circumferential direction. The warp yarn portions 213b are alternately arranged in the circumferential direction so that the warp yarn portions 213b do not overlap each other in the space of different layers adjacent in the radial direction. For example, in this embodiment, the warp part 213b arrange | positioned in the space of the 1st layer is shifted | deviated and arrange | positioned in the circumferential direction with respect to the warp part 213b arrange | positioned in the space of the 2nd layer. The warp portion 213b disposed in the third layer space is disposed in the first layer space while being displaced in the circumferential direction with respect to the warp portion 213b disposed in the second layer space. The warp yarn portions 213b are arranged at the same circumferential position.

Next, the operation of the seal structure 1e of the fifth embodiment having the above configuration will be described.
In the seal structure 1e of the fifth embodiment as described above, as shown in FIG. 15, the space between the disposing member 2 and the through hole 13 is filled with the refractory seal material 3 and closed without a gap. And the fireproof member 5 which provided the 1st thermal expansion fireproof material 6 in the recessed part 51 is arrange | positioned in contact with the surface 11 of the wall part 10 so that it may contact | adhere without a gap. The refractory member 5 is fixed to the outer peripheral surface of the arrangement member 2 when the band member 7 is wound radially outward.

  However, as shown in FIG. 17, when a fire due to an earthquake occurs, the arrangement member 2 vibrates due to the earthquake vibration and moves relative to the wall portion 10. When the disposing member 2 moves relative to the wall portion 10, the refractory member 5 also moves together with the disposing member 2, and the surface 11 of the wall portion 10 and the surface on the other side in the axis O direction of the refractory member 5 are separated from each other. Thus, a gap G is formed. Here, the support member 21 that is the drop-off prevention unit 20 does not jump out toward the gap G from the first thermal expansion refractory material 6 packed in the recess 51 of the refractory member 5 even if vibration in the direction of the axis O occurs. It supports by the net part 213 toward the other side in the axis O direction inside the concave part 51.

  Thereafter, in a state where a gap G is formed between the refractory member 5 and the surface 11 of the wall 10, a fire occurs on one side in the axis O direction facing the surface 11 of the wall 10, and the flame enters the gap G. Begin to invade. Here, since the concave portion 51 of the refractory member 5 is concave from the other side in the direction of the axis O, the first thermally expanded refractory material 6 provided in the concave portion 51 is exposed to the flame that has entered the gap G. Therefore, the heat by the flame that has entered the gap G propagates to the first thermally expanded refractory material 6 provided in the recess 51 of the refractory member 5, and the first thermally expanded refractory material 6 starts to expand.

  As shown in FIG. 18, the first thermally expanded refractory material 6 that has started to expand jumps out into the gap G from the support hole portion 213 c formed by the mesh portion 213 of the support member 21. The first thermally expanded refractory material 6 that has jumped into the gap G advances while expanding in the gap G along the wall 10. Then, the first thermal expansion refractory material 6 expands in the gap G, so that the gap G between the wall 10 and the refractory member 5 is closed, and fire or heat reaches the refractory seal material 3 and is damaged. The influence is prevented.

  Conventionally, when the first thermal expansion refractory material 6 is disposed in the recess 51 of the refractory member 5, if the refractory member 5 and the surface 11 of the wall portion 10 are separated from each other to form a gap G, the gap G Therefore, a part of the first thermal expansion refractory material 6 may fall, and the fire resistance may not be sufficiently secured.

  On the other hand, according to the seal structure 1e as described above, the disposing member 2 moves relative to the wall portion 10 due to an earthquake or the like, and the other side in the axis O direction of the refractory member 5 fixed to the outer peripheral surface of the disposing member 2. Even if a gap G is generated between the side surface and the surface 11 of the wall portion 10, the gap G is closed by the first thermal expansion refractory material 6 provided in the recess 51 recessed from the other side in the axis O direction of the refractory member 5. can do. Specifically, before the flame or heat enters the gap G and reaches the refractory seal material 3 to cause damage, the heat of the flame propagates and is provided in the recess 51 of the refractory member 5. The first thermally expanded refractory material 6 can be expanded. Furthermore, by providing the drop-off prevention part 20 that suppresses the drop-off of the first thermal expansion refractory material 6 in the opening 51a of the recess 51 of the refractory member 5, the first thermal expansion refractory material 6 is recessed when the gap G occurs. It can be prevented that it jumps out of 51 and falls. Therefore, even if the disposing member 2 moves relative to the wall portion 10 due to an earthquake or the like and a gap G is generated between the surface on the other side in the axis O direction of the refractory member 5 and the surface 11 of the wall portion 10, The one-temperature-expanding refractory material 6 can be expanded toward the gap G while remaining in the recess 51 without dropping off. Thereby, the gap G can be closed by expanding the first thermal expansion refractory material 6 with the gap G, and when the gap G is generated between the refractory member 5 and the wall portion 10, the fire resistance is highly accurate. Can be secured.

  Further, since the drop-off prevention part 20 is the support member 21, the first thermal expansion refractory material 6 is supported by the net part 213. That is, the opening 51a of the recessed portion 51 is covered with the mesh portion 213, and the first thermal expansion refractory material 6 is supported by the weft portion 213a and the warp portion 213b. The opening 51a is kept open without being closed by the support hole 213c formed by the weft 213a and the warp 213b. Therefore, even if the disposing member 2 moves relative to the wall portion 10 due to an earthquake or the like and a gap G is generated between the surface on the other side in the axis O direction of the refractory member 5 and the surface 11 of the wall portion 10, Since the weft portion 213a and the warp portion 213b of the portion 213 support the concave portion 51, the first thermal expansion refractory material 6 is not dropped off. Furthermore, when heat propagates to the first thermal expansion refractory material 6 and expands, the first thermal expansion refractory material 6 is expanded toward the gap G by providing the support hole 213c. There is no hindrance. By these, when the gap G arises between the refractory member 5 and the wall portion 10, it is easy to ensure the fire resistance with high accuracy without dropping the first thermal expansion refractory material 6 from the recess 51. it can.

  Further, by fixing the refractory member 5 to the outer peripheral surface of the disposing member 2 via the first heat insulating material 41 fixed to the outer peripheral surface of the disposing member 2, when the fire occurs, the disposing member 2 is interposed. Heat can be prevented. That is, it is possible to prevent heat from being transmitted to the first thermal expansion refractory material 6 through the arrangement member 2 by the first heat insulating material 41 that is the heat insulating material 4. Therefore, the first thermally expanded refractory material 6 can be reacted only with the heat of the flame that has entered the gap G generated between the surface on the other side in the axis O direction of the refractory member 5 and the surface 11 of the wall portion 10. As a result, the first thermally expanded refractory material 6 can be expanded with high accuracy by the heat of the flame that has entered the gap G. Therefore, when the gap G is generated between the refractory member 5 and the wall 10, the gap is generated. G can be closed with higher accuracy.

  Further, by providing the first heat insulating material 41 and the second heat insulating material 42 so as to overlap each other on the one side in the axis O direction of the refractory member 5, it is more possible that heat is transmitted from the one side in the axis O direction through the disposing member 2. It can be surely prevented. As a result, the first thermally expanded refractory material 6 can be expanded by the heat of the flame or the like with respect to the flame that has entered the gap G, and the gap G can be closed with higher accuracy.

  In addition, the support member 21 is not limited to the shape of this embodiment. For example, a structure in which a support hole 213c penetrating to the opening 51a is formed in a simple plate member may be employed. In other words, the support member 21 only needs to support the first thermally expanded refractory material 6 packed in the inside toward the one side in the axis O direction without completely closing the opening 51a of the recess 51.

Next, with reference to FIG.19 and FIG.20, the seal structure 1f of 6th embodiment is demonstrated.
In the sixth embodiment, the same components as those in the first to fifth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted. The seal structure 1f of the sixth embodiment is different from the first embodiment to the fifth embodiment with respect to the configuration of the dropout prevention unit 20.

  That is, as shown in FIG. 19, the seal structure 1 f of the sixth embodiment has a shrinkage that is reduced in diameter toward the other side in the axis O direction on the inner peripheral surface of the recess 51 of the refractory member 5 as the drop-off prevention portion 20. A diameter portion 22 is formed.

  The reduced diameter portion 22 is formed on the inner peripheral surface of the recess 51 and is reduced in diameter so as to narrow the opening 51a toward the other side in the axis O direction. The reduced diameter portion 22 in the present embodiment is formed integrally with the recess 51. Specifically, in the reduced diameter portion 22, the inner peripheral surface of the recess 51 in the first embodiment gradually protrudes inward from the bottom surface on one side in the axis O direction toward the opening 51a on the other side in the axis O direction. The diameter of the recess 51 is reduced. That is, the reduced diameter portion 22 is formed so that the opening 51a of the recess 51 of the refractory member 5 is narrower than the bottom on the other side in the axis O direction.

Next, the operation of the seal structure 1f of the sixth embodiment having the above configuration will be described.
In the seal structure 1f of the sixth embodiment as described above, as shown in FIG. 20, when a fire due to an earthquake occurs, the disposing member 2 vibrates due to the vibration of the earthquake, as in the fifth embodiment. Move relative to 10. When the disposing member 2 moves relative to the wall portion 10, the refractory member 5 also moves together with the disposing member 2, and the surface 11 of the wall portion 10 and the surface on the other side in the axis O direction of the refractory member 5 are separated from each other. Thus, a gap G is formed. Here, due to the reduced diameter portion 22 formed in the recess 51 as the drop-off prevention portion 20, the shape of the recess 51 is reduced in diameter toward the opening 51a. Therefore, even if the first thermal expansion refractory material 6 packed in the recess 51 is vibrated in the direction of the axis O, the opening 51a is restrained from moving to the other side in the direction of the axis O and does not jump out into the gap G. .

  Thereafter, in a state where a gap G is formed between the refractory member 5 and the surface 11 of the wall 10, a fire occurs on one side in the axis O direction facing the surface 11 of the wall 10, and the flame enters the gap G. Begin to invade. Here, since the concave portion 51 of the refractory member 5 is concave from the other side in the direction of the axis O, the first thermally expanded refractory material 6 provided in the concave portion 51 is exposed to the flame that has entered the gap G. Therefore, the heat by the flame that has entered the gap G propagates to the first thermally expanded refractory material 6 provided in the recess 51 of the refractory member 5, and the first thermally expanded refractory material 6 starts to expand.

  The first thermally expanded refractory material 6 that has started to expand jumps out into the gap G from the opening 51 a narrowed by the reduced diameter portion 22. The first thermally expanded refractory material 6 that has jumped into the gap G advances while expanding in the gap G along the wall 10. Then, the first thermal expansion refractory material 6 expands in the gap G, so that the gap G between the wall 10 and the refractory member 5 is closed, and fire or heat reaches the refractory seal material 3 and is damaged. The influence is prevented.

  According to the sealing structure 1f as described above, the opening 51a is formed on the axis O of the recess 51 by forming the reduced diameter portion 22 that decreases in diameter toward the other side in the axis O direction as the drop-off prevention portion 20. It can be narrower than the space on one side in the direction. Therefore, even if it vibrates in the direction of the axis O due to vibration such as an earthquake, the opening 51a is narrowed so that the first thermal expansion refractory material 6 moves from the opening 51a to the other side in the direction of the axis O. The first thermal expansion refractory material 6 is not dropped into the gap G. Furthermore, when heat propagates to the first thermal expansion refractory material 6 and expands, the opening 51a is narrowed and not closed, so the first thermal expansion refractory material 6 has a gap G. It does not hinder expansion toward By these, when the gap G arises between the refractory member 5 and the wall portion 10, it is easy to ensure the fire resistance with high accuracy without dropping the first thermal expansion refractory material 6 from the recess 51. it can.

  Note that the reduced diameter portion 22 is not limited to the shape of the present embodiment. For example, a rib shape may be formed that protrudes from the inner peripheral surface of the recess 51 and is spaced apart in the circumferential direction.

Next, the seal structure 1g of the seventh embodiment will be described with reference to FIGS.
In the seventh embodiment, the same components as those in the first to sixth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted. The seal structure 1g of the seventh embodiment is different from the first embodiment to the sixth embodiment with respect to the configuration of the drop-off prevention unit 20.

  That is, the seal structure 1g of the seventh embodiment has a position fixing portion 23 that fixes the position of the first thermal expansion refractory material 6 in the recess 51 as the dropout prevention portion 20, as shown in FIG. .

  The position fixing portion 23 fixes the position so that the first thermal expansion refractory material 6 packed in the recess 51 does not move from the recess 51. The position fixing portion 23 includes a disc portion 231 that is fixed inside the fireproof member 5 and a first cylindrical portion 232 that protrudes from the disc portion 231 toward the other side in the axis O direction. Further, the position fixing portion 23 has a second cylindrical portion 233 projecting from the disc portion 231 toward the other side in the axis O direction on the outer side in the radial direction than the first cylindrical portion 232, and a diameter larger than that of the second cylindrical portion 233. A third cylindrical portion 234 projecting from the disc portion 231 toward the other side in the axis O direction on the outer side in the direction, and from the disc portion 231 toward the other side in the axis O direction on the outer side in the radial direction than the third cylindrical portion 234. And a fourth cylindrical portion 235 protruding. In addition, the position fixing unit 23 includes projecting portions 236 provided on the first cylindrical portion 232, the second cylindrical portion 233, and the third cylindrical portion 234, respectively.

  The disc part 231 fixes the position fixing part 23 to the fireproof member 5. The disc portion 231 has a disc shape centered on the axis O, and a hole passing through the axis O is formed in the same manner as the refractory member 5. The disc portion 231 is arranged so as to be embedded without protruding into the fireproof member 5.

  The first cylindrical portion 232 protrudes from the surface on the other side in the axis O direction of the disc portion 231 in a cylindrical shape centered on the axis O. The first cylindrical portion 232 is disposed at a position where the inner peripheral surface is in contact with the outer peripheral surface of the first heat insulating material 41. That is, the first cylindrical portion 232 is disposed so that a part of the outer peripheral surface is located in the recess 51.

  The second cylindrical portion 233 protrudes from the surface on the other side in the axis O direction of the disc portion 231 in a cylindrical shape centering on the axis O having a diameter larger than that of the first cylindrical portion 232. The second cylindrical portion 233 is disposed at a radial intermediate position between the outer peripheral surface of the first heat insulating material 41 and the inner peripheral surface of the recess 51. That is, the second cylindrical portion 233 is disposed so that a part thereof is located in the recess 51.

  The third cylindrical portion 234 protrudes from the surface on the other side in the axis O direction of the disc portion 231 in a cylindrical shape centering on the axis O having a larger diameter than the second cylindrical portion 233. The third cylindrical portion 234 is disposed at a position where the outer peripheral surface is in contact with the inner peripheral surface of the recess 51. That is, the third cylindrical portion 234 is disposed so that a part of the inner peripheral surface is located in the recess 51.

  The fourth cylindrical portion 235 protrudes from the surface on the other side in the axis O direction of the disc portion 231 in a cylindrical shape centering on the axis O having a diameter larger than that of the third cylindrical portion 234. The fourth cylindrical portion 235 is disposed so as to be embedded without protruding from the refractory member 5.

  The protrusion 236 is formed to protrude in the radial direction toward the first thermal expansion refractory material 6 in the recess 51. The projecting portion 236 is formed on the outer peripheral surface of the first projecting portion 236 a formed on the inner peripheral surface of the second cylindrical portion 233 or the third cylindrical portion 234 and on the outer peripheral surface of the first cylindrical portion 232 or the second cylindrical portion 233. Two protrusions 236b.

  As shown in FIG. 22A, a plurality of first protrusions 236a are formed to protrude from the inner peripheral surfaces of the second cylindrical part 233 and the third cylindrical part 234 with a rectangular cross section. Specifically, a plurality of first projecting portions 236a are arranged on the inner peripheral surfaces of the second cylindrical portion 233 and the third cylindrical portion 234 so as to be spaced apart in the axis O direction and the circumferential direction. The first projecting portion 236a is disposed such that the long side of the rectangular cross section is inclined with respect to the axis O.

  As shown in FIG. 22B, a plurality of second projecting portions 236b are formed so as to project from the outer peripheral surfaces of the first cylindrical portion 232 and the second cylindrical portion 233 with a rectangular cross section. Specifically, a plurality of second projecting portions 236b are arranged on the outer peripheral surfaces of the first cylindrical portion 232 and the second cylindrical portion 233 so as to be spaced apart in the axis O direction and the circumferential direction. The second protrusion 236b is arranged in parallel with the first protrusion 236a so that the long side of the rectangular cross section is inclined with respect to the axis O.

Next, the operation of the seal structure 1g of the seventh embodiment having the above configuration will be described.
In the seal structure 1g of the seventh embodiment as described above, the first thermal expansion refractory material 6 provided in the recess 51 of the refractory member 5 includes the first cylindrical portion 232 of the position fixing portion 23 and the second By projecting the cylindrical portion 233 and the third cylindrical portion 234, the space between the outer peripheral surface of the first cylindrical portion 232 and the inner peripheral surface of the second cylindrical portion 233, and the outer peripheral surface of the second cylindrical portion 233. And a space between the inner peripheral surface of the third cylindrical portion 234.

  Then, as in the fifth embodiment, as shown in FIG. 23, when a fire due to an earthquake occurs, the arrangement member 2 vibrates due to the earthquake and moves relative to the wall portion 10. When the disposing member 2 moves relative to the wall portion 10, the refractory member 5 also moves together with the disposing member 2, and the surface 11 of the wall portion 10 and the surface on the other side in the axis O direction of the refractory member 5 are separated from each other. Thus, a gap G is formed. Here, since the position fixing part 23 is provided as the drop-off preventing part 20, the first thermal expansion refractory material 6 packed in the concave part 51 is not affected by the first protrusion even if vibration in the axis O direction occurs. Since the 236a and the second protrusion 236b are caught and caught, the movement in the recess 51 is suppressed. Therefore, the first thermal expansion refractory material 6 does not jump out of the recess 51 into the gap G.

  Thereafter, in a state where a gap G is formed between the refractory member 5 and the surface 11 of the wall 10, a fire occurs on one side in the axis O direction facing the surface 11 of the wall 10, and the flame enters the gap G. Begin to invade. Here, since the concave portion 51 of the refractory member 5 is recessed from the other side in the axis O direction, the first thermal expansion refractory material 6 embedded between the position fixing portions 23 provided in the concave portion 51 enters the gap G. Exposed to fire. Therefore, the heat by the flame that has entered the gap G propagates to the first thermally expanded refractory material 6 provided in the recess 51 of the refractory member 5, and the first thermally expanded refractory material 6 starts to expand.

  The first thermal expansion refractory material 6 that has started to expand includes a space between the outer peripheral surface of the first cylindrical portion 232 and the inner peripheral surface of the second cylindrical portion 233, and the outer peripheral surface of the second cylindrical portion 233 and the third cylinder. It jumps out into the gap G from the space between the inner peripheral surface of the portion 234. The first thermally expanded refractory material 6 that has jumped into the gap G advances while expanding in the gap G along the wall 10. Then, the first thermal expansion refractory material 6 expands in the gap G, so that the gap G between the wall 10 and the refractory member 5 is closed, and fire or heat reaches the refractory seal material 3 and is damaged. The influence is prevented.

  According to the sealing structure 1g as described above, the protruding portion 236 of the position fixing portion 23 protrudes in the concave portion 51 in the radial direction toward the first thermal expansion refractory material 6 as the drop-off preventing portion 20. 236 can bite into the first thermal expansion refractory material 6 and be hooked to fix the position. Specifically, in the space between the outer peripheral surface of the first cylindrical portion 232 and the inner peripheral surface of the second cylindrical portion 233 in the recess 51, the first protrusion provided on the inner peripheral surface of the second cylindrical portion 233. The part 236 a and the second protrusion 236 b provided on the outer peripheral surface of the first cylindrical part 232 bite into the first thermal expansion refractory material 6. Similarly, in the space between the outer peripheral surface of the second cylindrical portion 233 and the inner peripheral surface of the third cylindrical portion 234 in the recess 51, the first protrusion 236a provided on the inner peripheral surface of the third cylindrical portion 234 is also provided. And the 2nd protrusion part 236b provided in the outer peripheral surface of the 2nd cylindrical part 233 bites into the 1st thermal expansion refractory material 6. FIG. Therefore, even if it is a case where it vibrates in the direction of the axis O by vibration such as an earthquake, the first protrusion 236a and the second protrusion 236b can be hooked on the first thermal expansion refractory material 6 and hinder movement in the axis O direction. The first thermal expansion refractory material 6 is not dropped into the gap G. Furthermore, when heat propagates to the first thermal expansion refractory material 6 and expands, the opening 51a is opened, and thus the first thermal expansion refractory material 6 is prevented from expanding toward the gap G. There is nothing. By these, when the gap G arises between the refractory member 5 and the wall portion 10, it is easy to ensure the fire resistance with high accuracy without dropping the first thermal expansion refractory material 6 from the recess 51. it can.

  Further, since the first projecting portion 236a and the second projecting portion 236b are arranged to be inclined with respect to the axis O, the first thermal expansion refractory material 6 has the axis more than the case where the first projecting portion 236a and the second projecting portion 236b are arranged parallel to the axis O. The resistance given to the first thermal expansion refractory material 6 when moving in the O direction increases. On the other hand, in the case of moving along the first projecting portion 236a and the second projecting portion 236b with an inclination with respect to the axis O, the resistance becomes smaller than when moving in the direction of the axis O. Therefore, even when the arrangement member 2 vibrates in the direction of the axis O due to vibration such as an earthquake as in the case where the gap G is formed, the movement of the first thermal expansion refractory material 6 in the recess 51 may be hindered. it can. And when a fire occurs and the 1st thermal expansion refractory material 6 expands, the 1st thermal expansion refractory material 6 can be expanded in the direction inclined with respect to the axis line O, and it prevents that it expands. There is no. Thereby, the gap G can be closed by expanding the first thermal expansion refractory material 6 in the gap G, and when the gap G is generated between the refractory member 5 and the wall portion 10, the fire resistance is further improved. It can be ensured with high accuracy.

  In addition, the protrusion part 236 is not limited to being arrange | positioned inclining with respect to the axis line O like this embodiment. For example, the protruding portion 236 may protrude in the form of a pin or may protrude in the form of a flange over the circumferential direction.

Next, the seal structure 1h according to the eighth embodiment will be described with reference to FIGS.
In the eighth embodiment, the same components as those in the first embodiment to the seventh embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The seal structure 1h of the eighth embodiment is different from the first embodiment to the seventh embodiment in terms of the configuration of the drop-off prevention unit 20.

  That is, as shown in FIG. 24, the seal structure 1 h according to the eighth embodiment has a blocking portion 24 that closes the opening 51 a of the recess 51 of the refractory member 5 as the dropout prevention portion 20.

  As shown in FIG. 25, the closing portion 24 is arranged so as to contact the other side of the refractory member 5 in the axis O direction and cover the concave portion 51 together with the refractory member 5. The closing part 24 closes the opening 51a so that the first thermal expansion refractory material 6 accommodated in the recess 51 does not come out of the opening 51a. The blocking portion 24 is made of a material that burns and burns when receiving heat. Specifically, the closing portion 24 of the present embodiment includes a closing portion main body 24a that is a semicircular sheet material, and a semicircular cutout portion formed by cutting the center of the closing portion main body 24a into a semicircular shape. 24b and a rectangular cutout portion 24c formed by cutting out a position 90 ° away from the outer peripheral side of the closing portion main body 24a into a rectangular shape.

  In the present embodiment, the closing portion 24 closes the opening 51a without any gaps using the two closing portion main bodies 24a. More specifically, the closing part 24 is arranged so that the two closing part main bodies 24a are opposed to the semicircular cutout part 24b via the disposing member 2 on the other side in the axis O direction of the refractory member 5. ing. The blocking portion 24 is connected at a plurality of locations by hitting a stapler 25 from the other side in the axis O direction in a state where the two blocking portion main bodies 24a are arranged so as not to overlap. And the obstruction | occlusion part 24 folds the outer peripheral side in which the rectangular notch part 24c of the obstruction | occlusion part main body 24a was formed with respect to the outer peripheral surface of the refractory member 5 to the one side in the axis O direction, and toward the fold-back part toward radial direction. The stapler 25 is fixed to the refractory member 5 by being struck. That is, the two closing portion main bodies 24a are fixed to the refractory member 5 so that the shape viewed from the direction of the axis O is a ring shape in which a hole through which the arrangement member 2 is inserted is formed.

Next, the operation of the seal structure 1h according to the eighth embodiment having the above-described configuration will be described.
In the seal structure 1h of the eighth embodiment as described above, the first thermal expansion refractory material 6 provided in the recess 51 of the refractory member 5 is accommodated in the recess 51 in a state where the opening 51a is closed by the closing portion 24. Has been.

  As in the fifth embodiment, when a fire due to an earthquake occurs, the arrangement member 2 vibrates due to the earthquake and moves relative to the wall 10. When the disposing member 2 moves relative to the wall portion 10, the refractory member 5 also moves together with the disposing member 2, and the surface 11 of the wall portion 10 and the surface on the other side in the axis O direction of the refractory member 5 are separated from each other. Thus, a gap G is formed. Here, even if the vibration in the direction of the axis O occurs in the first thermal expansion refractory material 6 packed in the recess 51, the opening 51 a is closed by providing the closing portion 24 as the drop-off prevention portion 20. Therefore, it does not jump out from the recess 51 to the gap G.

  Thereafter, as shown in FIG. 26, a fire occurs on one side in the axis O direction facing the surface 11 of the wall portion 10 with a gap G formed between the refractory member 5 and the surface 11 of the wall portion 10. Then, the flame begins to enter the gap G. Therefore, the closed portion 24 closing the opening 51a is exposed to a flame and burns by receiving heat. As a result, the blocking portion 24 is burned out and the opening 51a of the recess 51 is opened. At the same time that the closed portion 24 receives heat and burns away, the first thermally expanded refractory material 6 accommodated in the recess 51 also receives the heat of the flame that has entered the gap G. Therefore, heat from the flame propagates to the first thermally expanded refractory material 6, and the first thermally expanded refractory material 6 starts to expand. Since the closed portion 24 is burned out and the opening 51a is opened, the first thermally expanded refractory material 6 jumps out into the gap G without being prevented from expanding. The first thermally expanded refractory material 6 that has jumped into the gap G advances while expanding in the gap G along the wall 10. Then, the first thermal expansion refractory material 6 expands in the gap G, so that the gap G between the wall 10 and the refractory member 5 is closed, and fire or heat reaches the refractory seal material 3 and is damaged. The influence is prevented.

  According to the sealing structure 1h as described above, by using the closing part 24 as the drop-off preventing part 20, the opening 51a of the recessed part 51 can be closed without a gap, and the first thermal expansion refractory material 6 is removed from the recessed part 51. Jumping out can be suppressed. Specifically, even when the gap G is generated due to an earthquake or the like and vibrates in the direction of the axis O, the closed portion 24 closes the opening 51a of the recessed portion 51. 6 can be prevented from moving in the direction of the axis O with respect to the opening 51a, and the first thermal expansion refractory material 6 is not dropped into the gap G. Furthermore, when heat propagates to the first thermal expansion refractory material 6 and expands, the heat is also propagated to the closed portion 24, so the closed portion 24 is burned out and the opening 51a is opened. Yes. Therefore, the blocking portion 24 does not hinder the first thermally expanded refractory material 6 from expanding toward the gap G. By these, when the gap G arises between the refractory member 5 and the wall portion 10, it is easy to ensure the fire resistance with high accuracy without dropping the first thermal expansion refractory material 6 from the recess 51. it can.

Next, a first modification of the eighth embodiment will be described with reference to FIGS.
In the first modification of the eighth embodiment, the same components as those in the first embodiment to the eighth embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The first modification of the eighth embodiment is different from the eighth embodiment in the structure for fixing the closing portion 24 to the refractory member 5.

  In the seal structure 1i of the first modified example of the eighth embodiment, the shape of the closing portion 241 is different from the shape of the closing portion 24 of the eighth embodiment. Specifically, the blocking portion 241 is not formed with the rectangular cutout portion 24c, and the blocking portion main body 241a, which is a semicircular sheet material, and the center of the closing portion main body 241a are cut into a semicircular shape. And a semicircular cutout portion 241b to be formed.

Moreover, the cyclic | annular closure fixing | fixed part 52 is formed in the outer peripheral surface at the refractory member 5 of the 1st modification of 8th embodiment.
The closing fixing portion 52 is integrally formed in a ring shape from the other side in the axis O direction on the outer peripheral surface of the fireproof member 5.

  And in the closure part 241 of the 1st modification of 8th embodiment, in the state which arranged the semicircle notch part 241b facing each other via the arrangement | positioning member 2 so that the two closure part main bodies 241a may not overlap. It is fixed only by the stapler 25 struck from the other side in the axis O direction. Specifically, the closing portion 241 is connected to the closing fixing portion 52 from the other side in the axis O direction after the two closing portion main bodies 241a are connected to each other by a stapler 25 in the same manner as in the eighth embodiment. The stapler 25 is fixed to the refractory member 5 by hitting a plurality of staplers 25 in the circumferential direction.

Next, a second modification of the eighth embodiment will be described with reference to FIGS.
In the second modification of the eighth embodiment, the same components as those in the first embodiment to the eighth embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The second modification of the eighth embodiment is different from the first modification of the eighth embodiment and the eighth embodiment with respect to the structure for fixing the closing portion 24 to the refractory member 5.

In the seal structure 1j of the second modified example of the eighth embodiment, the closed part 242 has the same two closed part main bodies 241a as the closed part 241 of the first modified example of the eighth embodiment. And in the obstruction | occlusion part 242 of the 2nd modification of 8th embodiment, the two obstruction | occlusion part main bodies 241a are being fixed by the nonflammable band 26 in the state connected by the stapler 25. FIG.
The incombustible band 26 is formed of a material that does not deform even when it receives heat. The incombustible band 26 has a string shape, and holes are formed at both ends.

  Specifically, in the closing part 242 of the second modification of the eighth embodiment, the two closing part main bodies 241 a are fixed to the refractory member 5 by a plurality of incombustible bands 26. More specifically, the incombustible band 26 is in a state where a hole on one end side is inserted with a fixing member 27 such as a pin or a button between the radially inner side of the refractory member 5 and the first heat insulating material 41. Fixed. And the incombustible band 26 is wound around the blocking portion 242 from the other side in the axis O direction, and the fixing member 27 is inserted into the hole on the other end side to the outer peripheral surface of the refractory member 5 in the radial direction. Fixed.

  The closing portions 24, 241, and 242 of the eighth embodiment and the first and second modifications of the eighth embodiment are not limited to bonding the two closing portion main bodies 24a and 241a. It is sufficient that the opening 51a is closed. For example, it may be rotated by 90 °, and the four closing portion main bodies 24a and 241a may be bonded and fixed so as to overlap each other. In this way, the strength of the blocking portions 24, 241, and 242 can be improved by overlapping and bonding the closing portion main bodies 24a and 241a in the direction of the axis O.

  In addition, the closing portions 24, 241, and 242 are not limited to materials that burn by receiving heat, and may not prevent the first thermally expanded refractory material 6 from expanding when receiving heat. For example, the closed portions 24, 241, and 242 are made of a thermally expandable material having a high expansion coefficient. When the closed portions 24, 241, and 242 are subjected to heat, the closed portions 24, 241, and 242 expand so as to extend and lose their strength, thereby expanding the first thermally expanded fireproof material 6. It is good also as a structure which does not inhibit.

  Furthermore, the fixing method of the closing portions 24, 241, and 242 is not limited to the eighth embodiment, the first modified example and the second modified example of the eighth embodiment, and if the opening 51a can be closed. Good. For example, the closing portion main bodies 24a and 241a may be bonded to the refractory member 5 and fixed with epoxy or an elastic adhesive.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the configurations and combinations of the embodiments in the embodiments are examples, and the addition and omission of configurations are within the scope not departing from the gist of the present invention. , Substitutions, and other changes are possible. Further, the present invention is not limited by the embodiments, and is limited only by the scope of the claims.

In this embodiment, the seal structure 1j is formed from the seal structure 1 on the wall 10 of the reactor building. However, the present invention is not limited to this, and the seal from the seal structure 1 is sealed on the floor or ceiling of the reactor building. Structure 1j may be provided.
In the present embodiment, the hole 13 is the through-hole 13 provided in the wall surface, but the present invention is not limited to this, and the hole 13 is formed to be recessed from the surface 11 of the structure such as the wall 10 of the reactor building. It may be a space.
Furthermore, although the cross-sectional shape orthogonal to the axis O of the through-hole 13 which is the hole part 13 is circular, other cross-sectional shapes may be sufficient.
Moreover, the arrangement | positioning member 2 is not restricted to piping which makes cylindrical shape, For example, a cross section is a piping with a rectangular shape, and it may be a cable etc. instead of piping.

  Furthermore, in this embodiment, although the refractory member 5 divided | segmented using the band member 7 is being fixed with respect to the arrangement | positioning member 2 from radial direction outer side, it is limited to using the band member 7 is not. For example, other fixing methods may be used such as bonding the fire-resistant members 5 divided without using the band member 7.

  Moreover, the 2nd thermal expansion refractory material 8 may be formed by laminating not only the thermal expansion sheet but also a plurality of flat heat-resistant members and sheet-shaped thermal expansion sheets. By setting it as such a structure, it can expand | swell along an axis line O direction.

  The first thermal expansion refractory material 6 has a putty shape like clay as in the present embodiment, or is laminated in a strip shape like the rectangular first thermal expansion refractory material 61, It is not limited to what is packed in the recess 51 of the refractory member 5. For example, it may be formed in a strip shape so as to form a long sheet. In this way, by forming a belt shape, the arrangement member 2 can be wound and fixed so as to be laminated in a roll shape over the outer peripheral surface, and the first thermal expansion refractory material 6 can be easily formed. Can be attached. And after attaching the 1st thermal expansion refractory material 6 to the arrangement | positioning member 2, the 1st thermal expansion refractory material 6 is provided in the recessed part 51 by attaching the refractory member 5 so that the 1st thermal expansion refractory material 6 may be covered. The fire-resistant member 5 can be easily installed on the disposing member 2.

DESCRIPTION OF SYMBOLS 1 ... Seal structure O ... Axis 10 ... Wall part 11 ... Front surface 12 ... Back surface 13 ... Through-hole 13 ... Hole part 2 ... Arrangement member 3 ... Fireproof sealing material 4 ... Heat insulating material 41 ... First heat insulating material 42 ... Second heat insulating Material 5 ... Refractory member 51 ... Recessed portion (gap) 6 ... First thermal expansion refractory material 7 ... Band member G ... Gap 8 ... Second thermal expansion refractory material 9 ... Heat resistant member 61 ... Rectangular first thermal expansion refractory material 510 ... Deformed recess S1 ... Thermal expansion refractory material fixing step S2 ... Refractory member fixing step 20 ... Fallout prevention portion 21 ... Supporting member 211 ... Outer peripheral annular portion 212 ... Inner peripheral annular portion 213 ... Net portion 213a ... Weft portion 213b ... Warp yarn portion 213c ... Support hole portion 22 ... Reduced diameter portion 23 ... Position fixing portion 231 ... Disc portion 232 ... First cylinder portion 233 ... Second cylinder portion 234 ... Third cylinder portion 235 ... Fourth cylinder portion 236 ... Projection portion 236a ... First Protrusion 236b ... second projection portion 24,241,242 ... closing portion 24a ... occlusion body 24b ... semicircular notch 24c ... rectangular notches 25 ... stapler 26 ... nonflammable band 27 ... fixing member

Claims (12)

An arrangement member extending along the axis so as to pass through the hole formed in the wall;
A fireproof sealing material that closes a space between the outer peripheral surface of the arrangement member and the inner peripheral surface of the hole;
A refractory member fixed to the outer peripheral surface of the arrangement member on the one side in the axial direction of the wall, and having a recess in contact with the wall and recessed from the other side in the axial direction;
A first thermal expansion refractory material provided in the recess and expanded by heat;
The heat propagates to the first thermal expansion refractory material through a gap between the refractory member and the wall portion formed by relative movement of the arrangement member and the wall portion in the axial direction. One seal expansion structure that expands refractory material.   The seal structure according to claim 1, further comprising a second thermally expanded refractory material that is fixed in close contact with the refractory seal material so as to be accommodated in the recess and expands by heat.   The seal structure according to claim 1, further comprising a heat-resistant member fixed in close contact with the fireproof sealant and not deformed by heat. Comprising a heat insulating material fixed to the outer peripheral surface of the arrangement member;
The seal structure according to any one of claims 1 to 3, wherein the refractory member is fixed to an outer peripheral surface of the arrangement member via the heat insulating material. An arrangement member extending along the axis so as to pass through the hole formed in the wall;
A fireproof sealing material that closes a space between the outer peripheral surface of the arrangement member and the inner peripheral surface of the hole;
A refractory member fixed to the outer peripheral surface of the arrangement member on one side in the axial direction of the wall, and in contact with the wall and having a gap formed inside;
A first thermal expansion refractory material provided in the gap and expands by heat;
A drop-off prevention part for suppressing the drop-off of the first thermal expansion refractory material from the opening on the other side in the axial direction in the gap,
The heat propagates to the first thermal expansion refractory material through a gap between the refractory member and the wall portion formed by relative movement of the arrangement member and the wall portion in the axial direction. One seal expansion structure that expands refractory material. The drop prevention part is
A support hole that is disposed in contact with the other axial side of the refractory member and penetrates to the opening is formed, and has a support member that supports the first thermally expanded refractory material toward the one axial side. The seal structure according to claim 5.   7. The seal structure according to claim 5, wherein the drop-off prevention part includes the gap part having a diameter reduced toward the other side in the axial direction.   The seal structure according to any one of claims 5 to 7, wherein the drop-off prevention portion has a protruding portion formed to protrude in the radial direction toward the first thermal expansion refractory material in the gap portion. The drop-off prevention portion includes a closing portion that closes the opening,
The seal structure according to any one of claims 5 to 8, wherein the closing portion opens the opening by receiving heat.   A nuclear reactor building comprising the seal structure according to any one of claims 1 to 9.   A nuclear power plant comprising the reactor building according to claim 10. An arrangement member extending along the axis so as to pass through the hole formed in the wall;
A sealing material that closes a space between the outer peripheral surface of the arrangement member and the inner peripheral surface of the hole;
A refractory member fixed to the outer peripheral surface of the arrangement member on the one side in the axial direction of the wall, and having a recess in contact with the wall and recessed from the other side in the axial direction;
A construction method of a seal structure provided with a first thermal expansion refractory material provided in the recess and expanded by heat,
A thermal expansion refractory material fixing step of fixing a plurality of the first thermal expansion refractory materials in a radial direction in the concave portion of the refractory member; and
After the thermal expansion refractory material fixing step, a seal comprising: a refractory member fixing step of winding a band member from the radially outer side of the refractory member over the circumferential direction to fix the refractory member to the outer peripheral surface of the arrangement member. Construction method of structure.

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