JPH102040A - Spreading fire preventive jig of pipe piercing part, and spreading fire preventive structure using the spreading fire preventive jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the execution property and the spreading fire preventive effect. SOLUTION: A spreading fire preventive jig 50 is fitted to pipes 10A, 10B covered with a heat insulation material, the jig 50 is provided on a pipe piercing part of a bulkhead 100, cylindrical bodies 20, 30 are provided at the position of each end in the pipe piercing part of the pipes 10A, 10B, the cylindrical bodies 20, 30 comprise upper shells 21, 31 and lower shells 22, 32 to be opened/closed in a freely holding manner to the pipes 10A, 10B, and the cylindrical bodies 20, 30 are connected to each other by a pin 23. The thermal expansion filling materials 41, 42 made of the fire- retarding material are provided in the cylindrical bodies 20, 30 between the pipes. Because the heat insulation material for pipes 10A-10D is combustible, the fire spreads toward the pipe piercing part through the heat insulation materials 1A-1D. The thermal expansion filling materials 41,42 are expanded, and no air passage is formed between the filling materials and the inner surface of the cylindrical bodies 20, 30, or between the filling materials and the heat insulation materials 1A-1D, and the spreading fire is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire spread prevention jig to be attached to a pipe penetrating a pipe penetration part of a structural member such as a floor or a wall, and a fire spread prevention of the pipe penetration part using the fire spread prevention jig. The present invention relates to a structure, and more particularly to a fire spread prevention jig which is easy to perform and has a high fire spread prevention effect, and a fire spread prevention structure of a pipe penetration portion using the fire spread prevention jig.

[0002]

2. Description of the Related Art Structural members such as floors and walls of buildings have pipe penetration portions through which piping such as a water supply pipe, a distribution pipe, and a refrigerant pipe of an air conditioner penetrates. The pipe penetration portion is provided with a fire spread prevention structure (fire resistant structure) based on the Building Standards Law and the like so that fire does not spread through the pipe penetration portion in the event of a fire. By the way, recently, a pipe in which a heat insulating material such as a foamed polyethylene is coated on a metal pipe such as a copper pipe has come to be used, and this heat insulating material is flammable. For this reason, various measures have been taken at the pipe penetration portion of such a pipe so as not to spread the fire through the heat insulating material.

[0003] As a conventional structure for preventing the spread of fire in a pipe penetration part,
For example, as shown in FIG.
1, a heat insulating material 1 of the pipe 10 is removed by 1 m or more on both sides from the pipe penetration part 101 to expose the metal pipe 2, and the inner wall surface 101 a of the pipe penetration part 101 is exposed.
And a space between the metal pipe 2 of the pipe 10 and a non-combustible material 102 such as mortar. According to this fire spread prevention structure, the flammable heat insulating material 1 is removed from the pipe penetration portion 101 on both sides by 1 m or more, so that the fire spread through the heat insulating material 1 can be prevented.

FIG. 7 shows a structure for preventing the spread of fire in the pipe penetration part shown in FIG. 6, in which the metal pipe 2 which has been exposed on both sides from the pipe penetration part 101 is coated with a noncombustible material 103 such as rock wool or glass wool. It was done.

However, the structure for preventing the spread of fire in the pipe penetration portion as shown in FIGS. 6 and 7 has a problem that the heat insulating material 1 has to be peeled off, and therefore, there is a problem that the construction is troublesome. Was. Therefore, recently, a structure for preventing fire from spreading in a pipe penetrating portion that can be easily and quickly performed has been proposed.

As shown in FIG. 8, the fire spread prevention structure at the pipe penetration portion is such that pipes 10A, 10B, 10C and 10D are bundled, and a bundle of pipes 10A to 10D is passed through a fireproof sleeve 111 made of a metal material. A tubular wall plate 112 on which the fireproof sleeve 111 is fitted is fitted into the pipe penetration portion 101, and the pipes 10 </ b> A to 10 </ b> D are inserted through the pipe penetration portion 101, and the fireproof sleeve 111 is attached to the wall plate 112.
To the fireproof sleeve 111 and the pipes 10A to 10D.
Are filled with a fire-resistant sealing material 113.
According to this, since the heat insulating material of the pipes 10A to 10D is not removed, the construction can be performed easily and quickly.

[0007]

However, such a structure for preventing the spread of fire in a pipe penetrating portion also has the following unsolved problems. B) It takes time and effort to fill a heat-insulating material such as a fire-resistant sealant without gaps between the combustible heat-insulating material and the fire-resistant sleeve 111. B) through the refractory sleeve 111 made of a metal material,
Heat is transmitted through the pipe penetration portion 101, and a gap is formed between the refractory sealant and the pipe and between the refractory sealant and the refractory sleeve, thereby forming a passage for air (oxygen), thereby reducing fire resistance. And the effect of preventing fire spread is low.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has been made in consideration of the above problems, and provides a fire spread jig capable of improving workability and a fire spread prevention effect, and a pipe penetration using the fire spread prevention jig. The purpose of the present invention is to provide a structure for preventing the spread of fire.

[0009]

A jig for preventing fire spread according to the present invention for achieving the above object is a jig mounted on a pipe covered with a heat insulating material and provided at a pipe penetration portion of a structural member. There is a tubular body which is detachable at positions corresponding to both ends in the pipe penetration portion of the pipe, and has a tubular body made of a refractory material, and the tubular body is sandwiched between the pipes, and is composed of two members which can be freely opened and closed. And the two cylinders are connected by a connection member having low thermal conductivity, and a heat-expandable filling material made of a flame-retardant material or a non-combustible material is provided between each of the cylinders and the pipe. It is characterized by being carried out.

Further, the fire spread prevention structure of the present invention is a fire spread prevention structure of a pipe penetration portion using the fire spread prevention jig of the present invention, wherein the pipe penetration portion of the structural member is covered with a heat insulating material. The pipe is penetrated, and the fire spread prevention jig is mounted on the pipe so as to dispose the tubular body at both ends of the pipe penetration part, and the pipe penetration part is provided with a heat-resistant filler. It is characterized by the following.

The operation of the present invention will be described below. According to the jig for preventing fire spread according to claim 1, first, a pipe is provided between the two members of the opened cylinder, and the two members of the cylinder are closed to easily and quickly prevent the fire from spreading on the pipe. A jig can be attached. Next, the fire spread prevention jig is inserted into the pipe penetration portion together with the piping, and the fire spread prevention jig is arranged in the pipe penetration portion. At this time, the cylinders of the fire spread prevention jig are arranged at both ends of the pipe penetration portion. Therefore, the heat-resistant filling material is filled in the pipe penetration portion. Thus, in the event of a fire, the tubular body made of a refractory material blocks the spread of fire through the heat insulating material of the pipe at both ends of the pipe penetration portion. Therefore, the pipe can be constructed without removing the heat insulating material. In addition, since the cylindrical body is connected by the connecting member having low thermal conductivity, the heat transmitted through the fire spread preventing jig can be reduced. Since a heat-expandable filling material made of a flame-retardant material or a non-combustible material is provided between the cylinder and the pipe, in the event of a fire, the heat-expandable filling material expands, and No gap is formed between the material and the cylinder, and between the heat-expandable filling material and the pipe, and the flow of air (oxygen) is prevented.
Heat transmitted from the cylinder to the pipe can be reduced. The invention according to claim 2 has the same effect as above.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. Note that the same members as those of the conventional fire spread prevention jig for the pipe penetration portion shown in FIGS. 6, 7 and 8 are denoted by the same reference numerals.

As shown in FIG. 1 and FIG.
No. 1 or a plurality of bundled pipes 10A, such as a water supply pipe, a distribution pipe, a refrigerant pipe of an air conditioner, etc.
10B, 10C, and 10D penetrate, and as shown in FIG. 3A, each of the pipes 10A, 10B, 10C, and 10D.
Is a metal tube 2A, 2B, 2C, 2D such as a copper tube coated with a heat insulating material 1A, 1B, 1C, 1D such as foamed polyethylene.

As shown in FIG. 1, a fire spread prevention jig 50 is mounted on the bundled plural pipes 10A to 10D, and the fire spread prevention jig 50 is provided in the pipe penetration portion 101 of the pipes 10A to 10D. The first and second cylinders 20 and 30 are detachable at positions corresponding to both ends (left and right ends in FIG. 1) and made of a refractory material such as metal.

The first and second cylinders 20 and 30 have a congruent cylindrical shape, and the first and second cylinders 20 and 30 penetrate in the directions of both ends (left and right ends in FIG. 1) of the pipe penetration portion 101. ing.
Further, the pipe penetration portions 10 of the first and second cylindrical bodies 20 and 30
1 are provided integrally with donut disk-shaped flame shields 20a, 30a at the outer end openings.
The inner peripheral surfaces 20b, 30b of the through holes a, 30a are crimped to the bundled pipes 10A to 10D. The flame shields 20a and 30a do not always need to be provided.

The first and second cylindrical bodies 20 and 30 are sandwiched between bundled pipes 10A to 10D and are detachable from the upper shell 2.
1 and 31 and lower shells 22 and 32, the upper shells 21 and 31 and the lower shells 22 and 32 are arranged such that, in FIG. The shape is divided into two.

FIG. 2 is a development view of the fire spread preventing jig 50.
As shown in FIG. 2, upper shells 21, 31 and lower shells 22, 3
2, pin receiving cylinders 21a, 21b, 22a, 2
2b, 31a, 31b, 32a, and 32b are formed with their respective pin holes oriented in the same direction as the pipes 10A to 10D. Further, the upper shell 21 and the lower shell 22 of the first cylinder 20 are provided.
The pin receiving cylinders 21a and 22a on one side have their pin holes communicated with each other. The pin holes of the pin receiving cylinders 21a and 22a are formed of a material which is melted by heat at the time of fire, such as solder or plastic. One end of the pin 23 is penetrated. Thereby, the upper shell 21 and the lower shell 22 of the first cylindrical body 20 are rotatable around the pin 23, that is, can be freely opened and closed.

Further, the upper shell 21 and the lower shell 2 of the first cylindrical body 20 are provided.
The pin receiving cylinders 21b and 22b on the other side of the
When the pin and the lower shell 22 are rotated about the pin 23 and closed, the respective pin holes are arranged to communicate with each other. Further, the pin receiving cylinder 22b of the lower shell 22 is connected to the second cylindrical body 30.
Located on the side. A pin 24 similar to the pin 23 is inserted and fastened and fixed to the pin receiving cylinder 22b of the lower shell 22. The other end of the pin 24 extends toward the second cylinder 30. ing. One end of the pin 24 slightly protrudes through the pin receiving cylinder 22b, and the protruding portion 24a of the pin 24 of the pin receiving cylinder 21b of the upper shell 21 when the upper shell 21 and the lower shell 22 are closed. Insert into the hole and lock.

Further, the upper shell 31 and the lower shell 3 of the second cylindrical body 30 are provided.
Pin receiving cylinders 31a, 32 on one side (pin 24 side)
a communicates with the pin hole, and the pin receiving cylinder 31
The other ends of the pins 24 pass through the pin holes a and 32a. Thereby, the upper shell 31 and the lower shell 32 of the second cylinder 30 are formed.
Is freely rotatable around the pin 24, that is, openable and closable.

The pin receiving cylinders 31b and 32b on the other side of the upper shell 31 and the lower shell 32 of the second cylindrical body 30 are closed when the upper shell 31 and the lower shell 32 rotate about the pin 24 and close. To
The pin holes are arranged at positions where the respective pin holes communicate with each other, and the pin receiving cylinder 32b of the lower shell 32 is located on the first cylindrical body 30 side. The other end of the pin 23 is inserted and fastened and fixed to the pin receiving tube 32b of the lower shell 32, and the other end of the pin 23 slightly projects through the pin receiving tube 32b. When the upper shell 31 and the lower shell 32 are closed, the protruding portion 23a is inserted into the pin hole of the pin receiving cylinder 31b of the upper shell 31 and locked.

Also, from the above, the pin 23 is connected to the first
Pin receiving cylinder 22a of lower shell 22 of second cylindrical body 20 and second cylindrical body 3
0 is connected between the pin receiving cylinders 32b of the lower shell 32, and the pins 24 are connected to the pin receiving cylinders 22b of the lower shell 22 of the first cylindrical body 20 and the pin receiving cylinders of the lower shell 32 of the second cylindrical body 30. The pins 23 and 24 are connected to the first cylinder 20 and the second cylinder
Of the cylindrical body 30 also serves as a connecting member.

The space between the first cylindrical body 20 and the pipes 10A to 10D is filled with a thermally expandable filling material 41 made of a flame-retardant material. A similar heat-expandable filler 42 is filled in between. The heat-expandable filling materials 41 and 42 are materials that, when heated in a fire, cause a chemical change to expand and maintain the same. For the purpose of preventing the expected spread of fire, a flame-retardant material or a non-combustible material is used. Any of the conductive materials can be used.
Note that refractories are chemically stable even at a high temperature of 1500 ° C., and thus cannot be used as a thermally expandable filling material. In the present embodiment, as an example of the heat-expandable filling materials 41 and 42, Flamadur A153 (manufacturer: AIK ISOLIER)
UND KUNSTSTOFF GMBH.FR Germany), and its composition is as follows: acrylic / isobutylene copolymer (47% by weight), ammonium polyphosphate (35% by weight), melamine (12% by weight), white pigment (Weight ratio 6%). In addition, as a quality control value (permissible error) of the weight ratio of each composition,
± 2, ± 2, ± 2, ± 1%. The heat-expandable filling materials 41 and 42 are flame-retardant materials. At about 180 ° C., they cause a chemical reaction and decompose to generate gas, and a film is formed to prevent the gas from escaping. I have. As a result, it can expand about 40 times and hold it.

As shown in FIG. 1, the pipe penetrating portion 101 has
The heat-resistant filler 102 is filled so as to bury the fire spread jig 50 and the pipes 10A to 10D. As the heat resistant filler 102, a general mortar is used,
Or Furamadur E473 (manufacturer: AIK ISOLI
Use ER UND KUNSTSTOFF GMBH.FRGermany).
The composition of the Flamadur E473 includes ordinary Portland cement (35% by weight) and mica (20% by weight).
%), Rock wool (5% by weight), gypsum (40% by weight)
%) Is used. The quality control values of the weight ratio of each composition were ± 2, ± 1, ± 0.5, ± 2%
It is. In addition, Flamadur E473 is used by mixing with predetermined water, and the mixing weight ratio of Flamadur E473 and water is about 100: 60 (± 5).

Since the fire spread prevention jig 50 has the above-described structure, the pipe 10A is connected to the pipe penetration portion 101 of the partition wall 100.
10D to 10D can be simply performed as follows.

First, as shown in FIG.
A to D are bundled, and heat-expandable filling materials 41 and 42 are pasted by a predetermined thickness at positions where the first and second cylindrical bodies 20 and 30 of the fire spread prevention jig 50 are mounted. In the present embodiment, as shown in FIG. 3B, as the thermally expandable filling materials 41 and 42, a frame expander A153 (denoted by reference numerals 3a and 3c) as a thermally expansible material and a glass mat (denoted by reference numeral 3b) are used. , 3d) are alternately laminated, and the glass mat (indicated by reference numerals 3b, 3d) is wound around the pipe so as to be positioned on the outer peripheral side. In addition, the heat-expandable filling materials 41 and 42 are not limited to the sheet-like materials of this example, and heat-resistant clay may be used.

Next, the portions of the pipes 10A to 10D around which the heat-expandable filling materials 41 and 42 are wound are fitted to the lower shells 22 and 32 of the first and second cylindrical bodies 20 and 30 in the opened state. And the upper shells 21, 31 of the first and second cylinders 20, 30
Close. Then, in the first cylindrical body 20, the upper shell 21
The projection 24a of the pin 24 is inserted and locked in the pin receiving cylinder 21b of the second cylindrical body 30, and the state is maintained. In the second cylindrical body 30, the projection 23a of the pin 23 is inserted into the pin receiving cylinder 31b of the upper shell 31. Lock and hold that state. Therefore, in the fire spread prevention jig 50 of the above embodiment, the first and second cylinders 2
Only by closing the upper shells 21 and 31 of 0,30, the pipe 10A
Since the fire spread prevention jig 50 can be mounted to 10 to 10D, the mounting can be performed easily and quickly as compared with the related art.

In this mounting, the heat-expandable filling material 41, between the cylindrical bodies 20, 30 and the pipes 10A to 10D.
42 are provided, so that in the event of a fire, the heat-expandable filling materials 41 and 42 expand and the heat-expandable filling material 4
1, 42, cylindrical bodies 20, 30, and heat-expandable filling material 4
No gap is formed between the first and second pipes and the pipes, so that the flow of air (oxygen) is prevented, and the thermally expandable filling materials 41 and 42 cause the pipes 10A to 10A to extend from the cylindrical bodies 20 and 30.
Heat conduction to 0D can be cut off.

In this mounting, as shown in FIG.
Flame shield plates 20a, 30 of first and second cylindrical bodies 20, 30
The heat insulating materials 1A to 10D shown in FIG. 3 of the pipes 10A to 10D are tightened by the inner peripheral surfaces 20b and 30b of FIG.

Next, as shown in FIG.
The fire spread prevention jig 50 is inserted into the pipe penetration part 101 together with 10 to 10 D, and the fire spread prevention jig 50 is arranged in the pipe penetration part 101. At this time, the first and second cylindrical bodies 21 and 31 of the fire spread prevention jig 50 are connected to both ends (left and right ends in FIG. 1) of the pipe penetration portion 101.
To distribute. Therefore, the heat-resistant filler 10
2 is filled by casting. Then, the fire spread prevention jig 50 becomes the first
And the flame shield plates 20a, 30a of the second cylindrical bodies 20, 30 are buried so as to be exposed, and the pipes 10A to 10D are
Only the portions protruding from the inner peripheral surfaces 20b, 30b forming the through-holes a, 30a are exposed.

As described above, the pipe penetration portion 1 of the partition wall 100
The installation of the pipes 10A to 10D to 01 is performed. Therefore, the pipes 10A to 10D can be constructed on the pipe penetrating portion 101 without removing the heat insulating materials 1A to 1D of the pipes 10A to 10D. Can be easily and quickly mounted, so that the workability of the pipes 10A to 10D to the pipe penetration portion 101 can be improved.

Next, regarding the fire spread in the event of a fire,
The description will be made on the assumption that a fire has occurred on one side of 0.

At this time, since the heat insulating materials 1A to 1D in FIG. 3 of the pipes 10A to 10D are flammable, the fire spreads toward the pipe penetration portion 101 through the heat insulating materials 1A to 1D. However, the heat insulating materials 1A to 1D are composed of the first and second heat insulating materials.
Are fastened by the inner peripheral surfaces 20b, 30b of the through holes of the flame shield plates 20a, 30a of the cylindrical bodies 20, 30.
Since the heat insulating materials 1A to 1D expand when heated,
The tightening is even tighter. Therefore, the heat insulating material 1
The supply of oxygen to the interior is shut off at its clamping position of A-1D. Further, since the flame shield plates 20a and 30a block the flame going into the pipe penetration portion 101, the heat insulating materials 1A to 1A are provided.
It is possible to prevent the fire from spreading to the pipe penetration portion 101 through D. In addition, heat-resistant filler 102
Is spread, so that the spread of fire other than those transmitted through the pipes 10A to 10D is prevented by the heat-resistant filler 102.

Conventionally, it has been necessary to consider a case where the fire spread prevention jig 50 is heated to cause a fire spread through the pipe penetrating portion 101. However, in the above embodiment, the exposed first and second exposed jigs 50 are required. The second cylinders 20, 30 are
Are connected by pins 23 and 24 having low thermal conductivity,
Further, since the pins 23 and 24 are formed of a material that melts at a high temperature, such as solder or plastic, the first and second cylinders 20 and 30 are separated at the time of fire. Therefore, since heat can be prevented from being transmitted through the fire spread prevention jig 50, the fire spreadability of the pipe penetration portion 101 can be improved.

Further, in the above embodiment, between the first and second cylindrical bodies 20 and 30 and the pipes 10A to 10D,
Since the heat-expandable filling materials 41 and 42 are provided, they expand in the event of a fire and expand between the inner surface of the cylinder and the heat insulating materials 1A to 1A.
Since no gap is formed between D and D and there is no air (oxygen) supply passage, the effect of preventing fire spread is high. In addition, the cylindrical bodies 20 and 3
0 to the pipes 10A to 10D,
It is possible to prevent the heat insulating materials 1A to 1D of the pipes 10A to 10D inside 01 from igniting. Therefore, the fire spreadability of the pipe penetration portion 101 can be further improved.

In the above embodiment, the cylinder 2
Although 0 and 30 are provided in a cylindrical shape so as to mount one or one bundle of pipes 10A to 10D, as shown in FIGS. 4 and 5, two or two bundles of pipes 10A to 10D and 10E to 10
It may be formed in a gourd-shaped cross section so that H can be attached at the same time. In the above embodiment, the pins 23, 24
Is formed from a material that is melted by heat,
There is no need to melt. Further, in the present embodiment, the partition 1
Although the pipe through hole 101 is described as an example, other structural members such as a floor may be used.

[0036]

Since the present invention is configured as described above, it has the following effects. According to the fire spread prevention jig of claim 1, construction can be performed on the pipe penetration portion of the structural member of the pipe without removing the heat insulating material of the pipe. Since the mounting of the refractory jig can be performed easily and quickly, the workability of the piping to the pipe penetration portion of the structural member can be improved.
In addition, since there is no gap between the cylinder and the heat-expandable filling material and between the heat-expandable filling material and the pipe, the passage of air (oxygen) is completely shut off. Further, since the heat transmitted through the fire spread prevention jig can be reduced, the fire resistance of the pipe penetration portion of the structural member can be improved. Since the heat transmitted from the cylinder to the pipe can be reduced, the fire resistance of the pipe penetration portion of the structural member can be further improved.
The structure for preventing fire spread according to claim 2 can provide a structure for preventing fire spread of a building having the same effect as the above effect.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing one embodiment of a structure for preventing a fire from spreading in a pipe penetration portion of the present invention.

FIG. 2 is a development view showing an embodiment of a fire spread preventing jig according to the present invention.

3A is a front view of the fire spread preventing jig of FIG. 2, and FIG.
FIG. 2 is an enlarged cross-sectional view of an example of a thermally expandable filling material.

FIG. 4 is a development view showing another embodiment of the fire spread preventing jig of the present invention.

FIG. 5 is a front view of the fire spread preventing jig of FIG. 4;

FIG. 6 is a view showing a first example of a conventional structure for preventing fire from spreading (a fireproof structure) in a pipe penetration portion.

FIG. 7 is a view showing a second example of a conventional structure for preventing fire from spreading in a pipe penetration portion.

FIG. 8 is a view showing a third example of a conventional structure for preventing fire from spreading in a pipe penetration portion.

[Explanation of symbols]

 Reference Signs List 1A to 1D Heat insulating material 10A to 10H Pipe 20 First cylinder 21 Upper shell (two members) 22 Lower shell (two members) 23 Pin (connection member) 24 Pin (connection member) 30 Second cylinder 31 Upper shell (Two members) 32 Lower shell (Two members) 41, 42 Thermal expansion filler material 50 Fire spread prevention jig 100 Partition wall (structural member) 101 Pipe penetration part 102 Heat resistant filler

Claims (2)

[Claims] 1. A fire spread jig attached to a pipe covered with a heat insulating material and provided at a pipe penetration part of a structural member, wherein the jig is detachable at a position corresponding to both ends in the pipe penetration part of the pipe, And a tubular body made of a refractory material, wherein the tubular body is composed of two members that are sandwiched between the pipes and are removably opened and closed, and the two tubular bodies are connected by a connecting member having low thermal conductivity. A jig for preventing fire from spreading in a pipe penetrating portion, wherein a heat-expandable filling material made of a flame-retardant material or a non-combustible material is provided between each pipe and the pipe. 2. A fire spread prevention structure for a pipe penetration using the fire spread jig according to claim 1, wherein a pipe covered with a heat insulating material penetrates the pipe penetration of the structural member, The pipe is equipped with the fire spread prevention jig so that the tubular body is disposed at both ends of the pipe penetration part, and the pipe penetration part is provided with a heat-resistant filler. A fire spread prevention structure using a fire spread prevention jig.