JP4066142B2 - Fire-proof compartment penetrating structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a penetration processing structure around a pipe arranged so as to penetrate a fire prevention section.
[0002]
[Prior art]
Conventionally, such the upper floor and the lower floor and the floor and adjacent walls for partitioning a space partitioning, the penetration processing structure for passing through piping means to various compartments are present in the building made of multilayer floor. When such a section is a fire prevention section, when a fire occurs in one space partitioned by the section, a penetration processing structure is required so that the flame does not enter the other space.
[0003]
FIG. 3 shows a penetration processing structure for a piping means that penetrates a conventional fire prevention compartment. The concrete slab 1 that partitions the upper floor and the lower floor is provided with a through hole 3 through which a pipe passes. A pipe 5,7, such as drainage pipes and ventilation tubes disposed on the upper floor, the pipe 9 that will be placed on the lower floor through the through-hole 3, are connected to each other by joint 11. These pipes 5, 7, 9 and fitting 11, with iron pipe, or by using a refractory bilayer tubes of the heat insulating double-layered structure combining an outer tube of the inner tube and the incombustible material made of synthetic resin, fire At times, there was a structure that did not convey the fire on the lower floor to the upper floor.
[0004]
[Problems to be solved by the invention]
However, when using iron pipes and fittings, the weight is increased, there is a problem that also increases the cost and also in the case of using a refractory bilayer tubes, the weight increase problem Tsu accompanied. Therefore, coating the thermal expandable sheet on the outer peripheral surface of the inner plastic tube of the through hole of the coating layer provided in the event of a fire in one of the spaces, the intumescent sheet fire heat inflated, it helps blockage of the synthetic resin tube, to occlude the conduit tube is present, whereby the flame to the other space there is technology to prevent the propagation.
[0005]
However, when coating such a heat-expandable sheet, it has not been clear how it is optimal to install the sheet on a synthetic resin tube to be coated. That is, when the coating layer of the heat-expandable sheet is too thin with respect to the pipe to be coated, there is a possibility that a sufficient pipeline blockage effect may not be obtained. Disadvantageous.
[0006]
Therefore, the present invention provides a pipe penetration structure for a fire prevention compartment having an annular covering layer of a heat-expandable sheet that can secure a sufficient pipeline blockage effect while suppressing an increase in cost. Objective.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention has a single-layer structure made of a synthetic resin, in which a joint connecting portion and a pipe portion forming a receiving port are integrally formed in a through-hole formed in a fireproof section that partitions a space. In a fire prevention section penetration processing structure in which a joint connection part of an integral pipe is arranged , the upper end of the joint connection part located in the through hole of the integral pipe extends from the outer periphery of the pipe part to the outer periphery of the pipe part. An annular coating layer made of a heat-expandable sheet is provided so that the lower end protrudes downward from the lower surface of the fire prevention compartment, and the thickness X [mm] of the coating layer is 3 (R / t). ) ^1/2 / A ≦ X ≦ 6 (R / t) ^1/2 / A (where R: outer diameter [mm] of the cover-part integrated pipe of the heated expansion sheet , t: integrated type of the cover part of the sheet ) difference between the outer diameter and the inner diameter of the pipe [mm], a: heat-expandable Sea It is characterized in that which is the expansion ratio).
[0008]
Incidentally, between gap between the outer surface of the inner surface and the thermal expandable sheet by coating the through holes formed in the fire rating, it is preferable that the refractory material is filled.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a fire-blocking section penetration processing structure according to a first embodiment of the present invention will be described with reference to the accompanying drawings.
[0010]
The concrete slab 21 that partitions the upper floor and the lower floor is provided with a through hole 23 through which a piping means made of a joint, piping, or the like passes. In this embodiment, the through hole 23, the joint connecting portion 27 which forms a receptacle for the flow of waste water from the joint 25 of the upper floor of the pipe to the lower floor is arranged. The joint connecting portion 27 is integrally formed with a pipe portion 29 extending on the lower floor. That is, the joint connecting portion 27 and the pipe portion 29 constitute an integrated pipe 26 having a receiving port. . Each of the joint 25, the joint connecting portion 27, and the pipe portion 29 has a single layer structure of a synthetic resin such as vinyl chloride. The joint 25 has a pipe connecting portion 31 that is divided into two branches at the upper portion thereof, and pipes 33 and 35 extending on the upper floor are connected to the pipe connecting portion 31. These pipes 33 and 35 are also made of a synthetic resin such as vinyl chloride, like the joint 25 and the integral pipe 26.
[0011]
Further, an annular covering layer 37 made of a heat-expandable sheet is provided from the outer peripheral surface of the joint connecting portion 27 located in the through hole 23 of the integrated pipe 26 to the outer peripheral surface of the pipe portion 29 . In the present embodiment, “Sekisui S refractory sheet” (foaming ratio 8 times) manufactured by Sekisui Chemical Co., Ltd. is used as the heat-expandable sheet. The upper end 37a of the coating layer 37 of the heat-expandable sheet is substantially flush with the upper surface of the concrete slab 21 and terminates inside the through hole, and the lower end 37b of the coating layer 37 of the heat-expandable sheet is made of concrete. It projects below the lower surface of the slab 21 so that this portion of the seat can expand quickly in the event of a fire.
[0012]
The thickness X [mm] of the coating layer 37 of the heat-expandable sheet is
3 (R / t) ^1/2 / A ≦ X ≦ 6 (R / t) ^1/2 / A
It has become.
Here, R is the outer diameter [mm] of the joint portion of the joint, t is the difference between the outer diameter and the inner diameter of the joint portion [mm], and A is the expansion ratio of the heat-expandable sheet.
[0013]
Further, between the gap between the outer peripheral surface of the coating layer 37 of the inner surface and the intumescent sheet of the through hole 23 formed in the concrete slab 21, refractory material 39 of the mortar is Ru Tei is filled. That is, after the integrated pipe 26 and the coating layer 37 of the heat-expandable sheet are disposed in the through hole 23, the gap in the through hole 23 is backfilled with the refractory material 39.
[0014]
Next, the operation of the fireproof compartment penetration processing structure configured as described above will be described. In the present penetration processing structure configured as shown in FIG. 1, the concrete slab 21 is sandwiched between the concrete slab 21 because the pipe means including the joint 25 of the pipes 33 and 35 and the integrated pipe 26 penetrate. Between the space on the floor and the space on the lower floor , fluid circulation action such as drainage and ventilation is secured. Here, if a fire occurs, for intumescent sheet covering layer 37 by the heat of the fire lower floor side to promote occlusion of the expanded tube, the space through which the pipe means have contact in the through-holes 23 Can be occluded. Thus, for example, a fire occurs in the lower level of the space, the integral pipe 26 made of heat with a synthetic resin is contracted, even occurred that clogging is Do so that incomplete, heating expansion of the covering layer 37 conducive to clogging of the integral pipe by gender sheet is inflated, the space being located integral pipe 26 is closed, the flame through such space can be prevented from propagating to an upper layer. In addition, since the refractory material 39 such as mortar fills the gap between the coating layer 37 of the heat-expandable sheet and the concrete slab 21, a flame is generated from one space above and below to the other space even with this structure. It is prevented from being propagated.
[0015]
By the way , when the thickness X of the annular covering layer 37 by the heat-expandable sheet is 3 (R / t) ^1/2 / A> X, the cover layer 37 of the heat-expandable sheet is too thin. If the road blocking effect is not sufficient and, conversely , X > 6 (R / t) ^1/2 / A, the coating layer 37 of the heat-expandable sheet is unnecessarily thick, and the cost becomes too high. there are, in the present invention, since the thickness of the covering layer 37 of intumescent sheet is set as described above, sufficient conduit occlusion effect can be obtained der Rutotomoni, cost, lightweight it is possible to achieve reduction.
[0016]
That is, specifically, by using the nominal diameter 100 of JIS K6741 as vinyl chloride pipe nominal diameter 100 and JIS K6739 "drainage rigid polyvinyl fitting chloride" in the "hard vinyl chloride pipe", as shown in FIG. 1 In addition, when the fireproof section penetrating structure according to the first embodiment was configured and a two-hour heating test based on ISO834 was performed, the following test results were obtained. The test includes the structure of the present embodiment having an annular coating layer (2 mm roll of sheet) with a heat-expandable sheet having a thickness within the range of the above-mentioned conditions, and a heat-expandable sheet with a thickness outside the range of the conditions. Comparison was made with the structure of a comparative example having an annular coating layer (sheet 1 mm roll) . First, when 2 minutes passed from the start of heating, foaming of the heat-expandable sheet started in both the examples and the comparative examples. After 5 minutes from the start of heating, dropping of the vinyl chloride pipe in the heating side space started in both the example and the comparative example. Furthermore, 13 minutes after the start of heating, in the comparative example, the vinyl chloride tube in the heating side space almost dropped off. On the other hand, in the example, the closure of the vinyl chloride tube was achieved by the foaming action of the heat-expandable sheet. Furthermore, in the comparative example, after 69 minutes from the start of heating, smoke was generated from the vicinity of the vinyl chloride tube and the surrounding mortar part, and after 72 minutes, the amount of the smoke began to gradually increase, and 112 minutes. Later, smoke came out from each seam portion of the vinyl chloride tube. On the other hand, in the example, even after 120 minutes from the start of heating, the polyvinyl chloride tube was continuously closed by the heat-expandable sheet, and no abnormality was observed. Thus, the coating layer of the annular intumescent sheet having a thickness of the present invention in the firestop through processing structure provided, it was possible to secure a sufficient conduit occlusion effect.
[0017]
In addition, since the thickness of the coating layer of the heat-expandable sheet is set as described above, a necessary pipeline blockage effect can be obtained and flame propagation can be prevented. There is no need for the means to be made of iron or to have a refractory double-layer tube structure as in the prior art. Due to this, in the present embodiment, since the pipes 33 and 35 and the joint 25 are all made of a single-layer pipe structure made of synthetic resin, they are excellent in chemical resistance, corrosion resistance and inner surface smoothness, and lightweight. excellent more workability that is, compared with the steel ones or refractory bilayer tube structure, is excellent in cost of construction. Therefore, in the fireproof section penetrating structure of the present embodiment, in addition to reducing the weight and cost of the heat-expandable sheet itself, the piping means itself is also lightened and the cost is reduced. overall weight reduction of the cost reduction is realized.
[0018]
Next, based on FIG. 2, a fire prevention compartment penetration processing structure according to a second embodiment of the present invention will be described. The fire prevention compartment penetration processing structure of the second embodiment is the same as the structure according to the first embodiment described above, except for the covering mode of the coating layer 137 of the heat-expandable sheet. A heat-expandable sheet having a thickness similar to that of the coating layer 37 of the heat-expandable sheet in the first embodiment is provided on the outer peripheral surface of the joint connecting portion located in the through hole 23 in the integrated pipe 26. An annular covering layer 137 is provided. The upper end 137a of the coating layer 137 of the heat-expandable sheet terminates at a position located below the upper surface of the concrete slab 21 by a dimension D (preferably about 20 mm to 50 mm). That is, the outer peripheral surface of the joint 25 in the through hole 23 has a portion that is not covered by the height dimension D. In the fire-blocking section penetration processing structure according to the second embodiment, in addition to the action exerted by the fire-blocking section penetration processing structure according to the first embodiment, the effect of blocking the passage of smoke during a fire is the first. This is even higher than in the first embodiment. That is, in the upper part of the through hole 23 (range of dimension D), the refractory material 39 such as mortar is in direct contact with the upper part of the pipe 26 without the coating layer 137 of the heat-expandable sheet. Even when the heat-expandable sheet of the layer 137 is heated and foamed and follows the deformation of the integrated pipe 26 made of a vinyl chloride tube, a gap is generated between the coating layer 137 of the heat-expandable sheet and the refractory material 39 , This Ru der possible to prevent the occurrence of smoke becomes airway.
[0019]
As described above, the fire-blocking section penetration processing structure of the present invention described above is not limited to the above-described embodiment, and can be implemented with appropriate modifications. Therefore, for example, the joint is not limited to a structure made of a synthetic resin, and may be formed of, for example, cast iron. In this case, specifically, a cast iron single pipe joint is used, and the receiving port is formed. An integrated pipe made of vinyl chloride in which the joint connecting portion and the pipe portion formed as an integral structure can be used. Moreover, divisions, such as concrete slab, are not limited to what partitions up and down adjacent space, You may partition the space which adjoins right and left.
[0020]
【The invention's effect】
As described above, according to the fireproof compartment penetration processing structure of the present invention, the annular coating layer of the heat-expandable sheet extends from the outer peripheral surface of the joint connection portion of the integrated pipe to the outer peripheral surface of the pipe portion, with terminating in the through-hole inner side, it protrudes the lower end of that is below the lower surface of the concrete slab, so that is optimally set the thickness of the coating layer, the occlusion of the tube section by quickly expanding in a fire implemented with occlusion of the arrangement space of the tube portion to facilitate be secured, lighter weight and piping means intumescent sheet itself, in addition to cost reduction, weight reduction of the entire firestop through processing structure, cost reduction can do.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a fire prevention compartment penetration processing structure according to a first embodiment of the present invention.
FIG. 2 is an explanatory diagram showing a fire prevention compartment penetration processing structure according to a second embodiment of the present invention.
FIG. 3 is an explanatory view showing a conventional fire prevention compartment penetration processing structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 21 ... Concrete slab (fire prevention division), 23 ... Through-hole, 25 ... Joint (pipe means), 26 ... Integrated piping (pipe means), 27 ... Joint connection part (pipe means), 29 ... Pipe part (pipe means) , 33, 35 ... piping (piping means) , 37, 137 ... coating layer of a heat-expandable sheet .

Claims (2)

In the through-hole formed in the fire prevention compartment that divides the space, the joint connection part of the single-layer structure integrated pipe made of synthetic resin, in which the joint connection part and the pipe part forming the receiving port are integrally formed , is disposed. In the fire prevention compartment penetration processing structure, the upper end of the joint connection portion located in the through hole of the integrated pipe extends from the outer peripheral surface of the pipe portion to the outer peripheral surface of the pipe portion , and the lower end of the fire prevention compartment An annular coating layer made of a heat-expandable sheet is provided so as to protrude downward from the lower surface, and the thickness X [mm] of the coating layer is
3 (R / t) ^1/2 / A ≦ X ≦ 6 (R / t) ^1/2 / A
A fireproof section penetrating structure characterized by
In addition, R: outer diameter [mm] of integral piping of the covering portion of the heat-expandable sheet
t: difference between the outer diameter and the inner diameter of the integral pipe in the covering portion of the sheet [mm]
A: The expansion ratio of the heat-expandable sheet.   2. A refractory material is filled in a gap between an inner surface of a through-hole formed in the fireproof section and an outer surface of a coating layer formed of the heat-expandable sheet so as to fill the gap. The structure for penetrating a fire prevention compartment as described.

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