JP2008168468A - Branched pipe lining material and branched pipe lining technique - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a branched pipe lining material and a branched pipe lining technique which enable performing of all operations from a main pipe side, and also, a faultless lining operation of a branched pipe regardless of ground circumstances. <P>SOLUTION: One end of a peel-off tube 5 is fitted to the outer periphery of a spot near a collar 3 formed at one end of a tubular resin absorbent material of a branched pipe lining material 1 impregnated with a curable resin. Also, a tubular peel-off end 6 with one closed end, is fitted to the outer peripheral part of the other end of the tubular resin absorbent material. In addition, the other end of the peel-off tube is fitted to a pressure bag 13, then compressed air is supplied into the pressure bag, and the branched pipe lining material is inversely inserted into the branched pipe by air pressure toward the ground from the main pipe side. When the branched pipe lining material is reversely inserted to the specified length, the former is heated while the branched pipe lining material is pressed to the inner peripheral surface of the branched pipe. After that, the curable resin with which the branched pipe lining material is impregnated, is cured and the peel-off end 6 is peeled and removed from the main pipe side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a branch pipe lining material used for lining a branch pipe branched from a main pipe and a branch pipe lining method using the same.

  When pipes such as sewage pipes buried in the ground are aged, pipe lining construction methods are known in which pipes are repaired by lining the inner peripheral surface without digging the pipes out of the ground. ing.

  In the pipe lining method described above, a pipe lining material obtained by impregnating a curable resin into a flexible tubular resin absorbent material whose outer peripheral surface is coated with a highly airtight film is reversed into a pipeline by fluid pressure. Inserting and pressing the pipe lining material against the inner peripheral surface of the pipe line, and heating the pipe lining material while maintaining the state to cure the curable resin impregnated therein, This is a method of lining the peripheral surface.

The above construction method can also be applied to a branch pipe branched from the main pipe, and is described in Patent Document 1, for example. In this method, a ridge formed at one end of a branch pipe lining material built in a pressure bag is set on a set nozzle of a work robot introduced into the main pipe, and the main branch pipe is driven by the drive of the work robot. It is closely attached to the periphery of the opening. If compressed air is supplied into the pressure bag, the branch pipe lining material is sequentially inserted into the branch pipe from the main pipe to the ground while being reversed by receiving the pressure of the compressed air. When the reverse insertion is completed over the entire length of the branch pipe, the branch pipe lining material is pressed against the inner peripheral surface of the branch pipe and heated to cure the thermosetting resin impregnated therein. The inner peripheral surface is lined with a hardened branch pipe lining material and repaired. When the branch lining material is hardened, the inverted end portion of the branch lining material protruding from the portion of the ridge that opens to the ground is cut off, and the working robot is removed from the main pipe together with the pressure bag. The lining work is completed.
JP-A-4-355115

  However, depending on the surrounding circumstances on the ground, it may not always be possible to excise the inverted end portion protruding from the ridge portion of the branch pipe lining material. Moreover, when the lining of the branch pipe does not extend over the entire length, but in the middle, there is a problem that it becomes difficult to cut off the terminal end of the branch pipe lining material on the ground side.

  An object of the present invention is to provide a branch pipe lining material and a branch pipe lining method capable of performing all work from the main pipe side and always enabling the lining of the branch pipe regardless of the ground conditions. is there.

The present invention
A scissor is formed at one end of a tubular resin absorbent material impregnated with a curable resin, and a branch pipe lining material that is inverted and inserted into a branch pipe to be repaired,
One end of the peeling tube is attached to the outer periphery in the vicinity of the collar,
A tubular peeling end with one end closed is attached to the outer peripheral portion of the other end of the tubular resin absorbent material,
The other end of the peeling tube is attached to a pressure bag for reversing and inserting the branch pipe lining material.

The present invention also provides:
A branch pipe lining method in which a branch pipe lining material formed with a ridge at one end of a tubular resin absorbent material impregnated with a curable resin is inverted and inserted into a branch pipe to be repaired to line the branch pipe,
Attach one end of the peel tube to the outer periphery of the heel,
Attach a tubular peeling end whose one end is closed to the outer peripheral portion of the other end of the tubular resin absorbent material,
Attach the other end of the peel tube to the pressure bag,
Compressed air is supplied into the pressure bag with the branch pipe lining material in close contact with the periphery of the branch pipe opening of the main pipe, and the branch lining material is brought into the branch pipe by air pressure from the main pipe side to the ground. Insert it upside down,
While the branch pipe lining material is pressed against the inner peripheral surface of the branch pipe, the curable resin impregnated in the branch pipe lining material is cured, and then the peeling end is peeled off from the main pipe side to remove it. It is characterized by.

  According to the present invention, the cutting work on the ground side of the reversing end of the branch pipe lining material is not necessary, and all the work can be performed on the main pipe side. Pipe lining can be implemented. Further, according to the present invention, even if a high pressure is applied to the peeling tube, it does not peel off or break, so that the reverse insertion of the branch pipe lining material into the branch pipe is ensured.

  Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

  A branch pipe lining material 1 shown in FIG. 1 includes a tubular resin absorbent material 2 made of a non-woven fabric, and one end of the branch pipe lining material 1 is folded outward to form a flange-shaped collar 3. The portion of the tubular resin absorbent material 2 except the ridge 3 is impregnated with an uncured liquid thermosetting resin, and the inner surface of the portion is coated with a highly airtight plastic film 4.

  In addition, polyester, polypropylene, nylon, acrylic, vinylon, etc. are selected as the material of the nonwoven fabric constituting the tubular resin absorbent material 2, and unsaturated polyester resin, epoxy resin, etc. are used as the thermosetting resin impregnated therein. It is done. The material of the plastic film 4 is selected from polyurethane, polyethylene, polyethylene / nylon copolymer, vinyl chloride and the like.

  The flange 3 formed at one end of the tubular resin absorbent material 2 forms a curved surface that is curved in an arc shape with a curvature equal to the main pipe 30 (see FIG. 3) described later, and the outer diameter thereof is a branch pipe 31 (described later). It is set larger than the inner diameter of FIG. 3), and the heel 3 retains its shape as the curable resin impregnated therein is cured.

  Further, a peeling tube 5 having a predetermined length is passed outside the tubular resin absorbent material 2, and one end of the peeling tube 5 is detachably bonded to the outer periphery of the tubular resin absorbent material 2 in the vicinity of the flange 3. The end is open. The material of the peel tube 5 is the same as that of the plastic film 4.

  On the other hand, a tubular peeling end 6 is detachably attached to the other end (inversion end) of the tubular resin absorbent material 2. The peeling end 6 is made of the same material as the plastic film 4, and as shown in detail in FIG. 2, one end thereof is closed by a fastener 7, and the other end opening is formed on the outer periphery of the tubular resin absorbent material 2. This is fitted and the tubular resin absorbent material 2 is connected by a thin plastic film 9 welded to both. A pulling rope 10 and an air bleeding hose 11 are connected to the peeling end 6 by bolts 7 and nuts.

  Next, a branch pipe lining method constructed using the branch pipe lining material 1 will be described with reference to FIGS.

  In FIG. 3, 30 is a main pipe such as a sewage pipe, 31 is a small-diameter branch pipe branched from the main pipe 30, and the working robot 12 assembled and integrated in advance on the ground in the main pipe 30, The pressure bag 13, the branch pipe lining material 1 and the like are drawn.

  The working robot 12 has a head 14 that advances and retreats in the directions of arrows a and b in FIG. 3 and rotates in the direction of arrow c. The head 14 supports a flange-shaped set nozzle 15. Yes. Further, a TV camera 16 for monitoring is installed on the upper part of the working robot 12. The tow ropes 17 and 18 are attached to the front and rear of the work robot 12, one tow rope 17 is connected to the pressure bag 13, and the other tow rope 18 is extended to the ground.

  On the other hand, the pressure bag 13 is configured by connecting two flexible tubes 19 and 20 with a cylindrical joint 21 and closing the open end of one tube 19 with a cap 22. Is attached to the cylindrical portion 15 a of the set nozzle 15.

  The branch pipe lining material 1 has its flange 3 set on the set nozzle 15, and the other non-inverted portion is stored in the pressure bag 13 through the set nozzle 15. At this time, the tow rope 10 connected to the peeling end 6 is attached to the cap 22, the air vent hose 11 passes through the cap 22 and extends out of the pressure bag 13, and a valve 23 is attached to the end thereof. ing.

  Further, a peeling tube 5 attached to the outer periphery of the tubular resin absorbent material 2 is also housed in the pressure bag 13, and the opening end of the peeling tube 5 is attached to the outer periphery of the joint 21 together with the tube 20. It has been.

  In the pressure bag 13, a sealed space closed by the branch pipe lining material 1 and the peeling tube 5 is formed, and the sealed space is installed on the ground via an air / hot water hose 24 attached to the cap 22. The hot water tank 27 is connected to a compressor 25 and a hot water hose 26 branched from the air / hot water hose 24. A valve 28 and a hot water pump 29 are connected in the middle of the hot water hose 26, and a valve 32 is connected to the air / hot water hose 24.

  In the above, the work robot 12 and the branch pipe lining material 1 and the pressure bag 13 supported by the work robot 12 are moved integrally to the position shown in FIG. 3 in the main pipe 30, and the head 14 of the work robot 12 is moved to the arrow. It is moved upward in the direction a to press the collar 3 of the branch pipe lining material 1 against the peripheral wall of the branch pipe opening of the main pipe 30 so as to be brought into close contact therewith.

  Next, when the compressor 25 is driven and the compressed air is supplied to the sealed space in the pressure bag 13 via the air / hot water hose 24, the branch pipe lining material 1 receives the pressure of the compressed air as shown in FIG. The inside of the branch pipe 31 is sequentially inserted from the main pipe 30 toward the ground side (upward) while being inverted. At this time, the sealed space is hermetically sealed by the peeling tube 5.

  Here, the length of the tubular resin absorbent material 2 of the branch pipe lining material 1 is set to be shorter than the length of the branch pipe 31, and the inversion of the branch pipe lining material 1 into the branch pipe 31 as shown in FIG. When the insertion is completed, the tubular resin absorbent material 2 of the branch pipe lining material 1 is partially pressed against the inner peripheral wall of a part of the branch pipe 31 (a part having a predetermined length from the main pipe 31). 6 is reversed as shown in the figure, and the air vent hose 11 connected thereto is drawn into the sealed space. Further, the plastic film 9 connecting the peeling end 6 and the tubular resin absorbent material 2 faces the sealed space.

  Next, if hot water is supplied into the sealed space through the hot water hose 26 and the air / hot water hose 24, the compressed air in the sealed space is released into the atmosphere through the air vent hose 11, while the branch pipe lining material 1 4 is heated while being pressed against the inner peripheral wall of the branch pipe 31, and the thermosetting resin impregnated in the tubular resin absorbent material 2 is cured, and the branch pipe 31 is cured by the tubular resin absorbent material. A part of the inner peripheral surface is partially lined by 2 and repaired (halfway lining).

  When the tubular resin absorbent material 2 of the branch pipe lining material 1 is cured, hot water is extracted from the sealed space, and the head 14 of the working robot 12 is moved downward in the direction of the arrow b as shown in FIG. After the branch pipe lining material 1 is pulled away from the flange 3, the air vent hose 11 and the like are pulled in the direction indicated by the arrow (left side in FIG. 5). Then, the peeling tube 5 and the peeling end 6 are pulled in the same direction, the peeling tube 5 is pulled off from the branch pipe lining material 1, and the peeling end 6 is also pulled away from the tubular resin absorbent material 2. Subsequently, the air bleeding hose 11, the working robot 12, the pressure bag 13, the peeling tube 5, and the peeling end 6 move integrally within the main pipe 30 and are removed from the main pipe 30, and are connected to the branch pipe 31. A series of lining work is completed.

  As described above, in the present embodiment, when the branch pipe lining material 1 is cured, the peeling end 6 is peeled off and removed, so that the cutting operation on the ground side of the inverted end of the branch pipe lining material 1 is performed. It becomes unnecessary, and all the work can be performed on the main pipe 30 side. As a result, the branch pipe 31 can always be lined reliably regardless of the ground conditions.

  In the above-described embodiment, the peeling tube 5 is only peeled and adhered to the outer periphery in the vicinity of the flange 3 of the tubular resin absorbent material 2, so that the peeling tube 5 is peeled off halfway and compressed air. May leak, making it impossible to reversely insert the branch pipe lining material. Therefore, as shown in FIG. 6, the branch pipe side end portion of the peeling tube 5 is integrally attached so as to be embedded in the flange 3 of the branch pipe lining material 1 (shown by a dotted line). In such a configuration, even if a high pressure is applied to the peeling tube 5, it does not peel off or break, so that the inverted insertion of the branch pipe lining material 1 into the branch pipe 31 is reliably performed.

  In FIG. 6, reference numeral 34 denotes a metallic perforation protection member, and a heating element (heater) 32 is attached to the upper end surface thereof. Therefore, when the branch pipe lining is completed, the heating element 32 can be energized from the electric cable 33 to cause the heating element 32 to generate heat, so that the peel tube 5 can be melted and separated from the basket 3.

  In the embodiment shown in FIG. 7, a cylindrical sealing member 40 is integrally formed with the flange 3 by a metal or hard plastic injection method, and a cylindrical tip nozzle 42 is fixed to the set nozzle 15. A ring-shaped elastic body 41 is fitted between the sealing member 40 and the tip nozzle 42, and the elastic body 17 is pressed against the inner peripheral surface of the sealing member 40 to hermetically seal the tip nozzle 42 and the sealing member 40. . Thereby, the inner peripheral surface of the sealing member 40 is configured to be a sealed wall surface that receives the pressure of the elastic body 41 and seals the fluid pressure, thereby ensuring high airtightness. Therefore, there is no leakage of compressed air, and the inverted insertion of the branch pipe lining material 1 into the branch pipe 31 is reliably performed.

  In such a configuration, an airtight connection between the pressure bag and the branch pipe lining material is made by an elastic body interposed between the tip nozzle and the sealing member, and the tip nozzle is pulled out from the fluid sealing member after the branch pipe lining is completed. As a result, the pressure bag is pulled away from the branch pipe lining material, so that the peeling tube 5 as shown in FIGS. 1 and 6 is not necessary.

  In the above-described embodiment, the scissors of the branch pipe lining material can be formed by plastic molding, and the scissors can be formed by attaching this to one end of the branch pipe lining material.

  In FIG. 2, the peeling end 6 is connected to the tubular resin absorbent material 2 by a plastic film 9, but instead of this, by welding using heat or plasma, or bonding using an adhesive or the like. It can also be attached to the tubular resin absorbent material 2.

  In the above-described embodiments, a thermosetting resin is used as the curable resin, and hot water is filled in the branch pipe to cure the thermosetting resin. However, the hot water is showered on the thermosetting resin, or hot water is used. You may make it make it mist and spray it on a thermosetting resin, and you may make it harden | cure. Moreover, you may make it harden a pipe lining material by irradiating an ultraviolet-ray using an ultraviolet curable resin instead of a thermosetting resin as curable resin.

It is sectional drawing of the branch pipe lining material which concerns on this invention. FIG. 2 is an enlarged detail view of a portion A (inversion end portion) of FIG. 1. It is sectional drawing which shows the branch pipe lining construction method concerning this invention. It is sectional drawing which shows the branch pipe lining construction method concerning this invention. It is sectional drawing which shows the branch pipe lining construction method concerning this invention. It is sectional drawing of the main pipe and branch pipe crossing in the case of carrying out sealing of the collar part of a branch pipe lining material using a tear-off tube. It is sectional drawing of a main pipe and a branch pipe intersection in the case of sealing an eaves part of a branch pipe lining material using an elastic body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Branch pipe lining material 2 Tubular resin absorber 3 鍔 4 Plastic film 5 Peeling tube 6 Peeling end 12 Work robot 13 Pressure bag 30 Main pipe 31 Branch pipe

Claims (10)

A scissor is formed at one end of a tubular resin absorbent material impregnated with a curable resin, and a branch pipe lining material that is inverted and inserted into a branch pipe to be repaired,
One end of the peeling tube is attached to the outer periphery in the vicinity of the collar,
A tubular peeling end with one end closed is attached to the outer peripheral portion of the other end of the tubular resin absorbent material,
The branch pipe lining material, wherein the other end of the peeling tube is attached to a pressure bag for reversing and inserting the branch pipe lining material.   The branch pipe lining material according to claim 1, wherein the tubular peeling end is welded or bonded to the outer peripheral portion of the other end of the tubular resin absorbent material through a film.   The branch pipe lining material according to claim 1, wherein the tubular peeling end is directly welded or bonded to the outer peripheral portion of the other end of the tubular resin absorbent material.   The branch pipe lining material according to claim 1, wherein one end of the peeling tube is attached to an outer periphery in the vicinity of the flange by adhesion.   The branch pipe lining material according to claim 1, wherein one end of the peeling tube is attached to the outer periphery in the vicinity of the ridge in a form of being embedded in the ridge.   The branch pipe lining material according to any one of claims 1 to 5, wherein the curable resin is a thermosetting resin or an ultraviolet curable resin. A branch pipe lining method in which a branch pipe lining material formed with a ridge at one end of a tubular resin absorbent material impregnated with a curable resin is inverted and inserted into a branch pipe to be repaired to line the branch pipe,
Attach one end of the peel tube to the outer periphery of the heel,
Attach a tubular peeling end whose one end is closed to the outer peripheral portion of the other end of the tubular resin absorbent material,
Attach the other end of the peel tube to the pressure bag,
Compressed air is supplied into the pressure bag with the branch pipe lining material in close contact with the periphery of the branch pipe opening of the main pipe, and the branch lining material is brought into the branch pipe by air pressure from the main pipe side to the ground. Insert it upside down,
While the branch pipe lining material is pressed against the inner peripheral surface of the branch pipe, the curable resin impregnated in the branch pipe lining material is cured, and then the peeling end is peeled off from the main pipe side to remove it. Branch pipe lining method characterized by   The branch pipe lining method according to claim 7, wherein a sealed space is formed between the pressure bag and the branch pipe lining material by the peeling tube.   The branch pipe lining method according to claim 7, wherein a sealed space is formed between the pressure bag and the branch pipe lining material via an elastic body.   The branch pipe lining method according to any one of claims 7 to 9, wherein the curable resin is a thermosetting resin or an ultraviolet curable resin.

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