JP4889453B2 - Fireproof double-layer pipe or fireproof double-layer pipe joint for penetration - Google Patents

Description

  The present invention relates to a fire-resistant double-layer pipe or a fire-resistant double-layer pipe joint having a structure in which a peripheral surface of an inner cylinder made of a synthetic resin is covered with a fiber mixed mortar and is piped through a partition wall of a building.

  The fire-resistant double-layer pipe or fire-resistant double-layer pipe joint having the above-described structure can withstand the heat of a fire of about 1,000 ° C. and has high safety in fire prevention and disaster prevention. In the case of a pipe joint, the inner pipe is made of a synthetic resin. Therefore, there is an advantage that a joint having a complicated internal structure can be manufactured. Recently, however, high performance and high performance are required, and one of them is a request to reduce the noise of the drainage flowing inside the inner cylinder.

  Noise leakage can be reduced by wrapping a sound insulating material having a felt sound absorbing layer and a rubber sound insulating layer around a fireproof double-layer pipe or pipe joint, as shown in Patent Document 1, for example. However, a fireproof double-layer pipe joint has a complicated peripheral surface shape, and its installation location is often embedded in a through-hole provided in a partition wall or floor slab, and a sound insulation material with a good sound insulation function is a composite layer. Since it is formed with a relatively thick and soft material, it is difficult to completely cover the periphery of the joint with a sound insulating material, and it is difficult to fix and install the joint in the through hole so that the joint does not move.

Also, there must be no gap between the fire-resistant double-layer pipe or fire-resistant double-layer pipe joint and the inner surface of the through-hole so that smoke or flame can pass in the event of a fire. This is not preferable because a fire spreads through a hole and a disaster caused by smoke damage spreads.
Japanese Patent No. 3156661

  The present invention provides a sound insulation function for preventing noise caused by drainage from propagating indoors through a partition wall, etc. to a fireproof two-layer pipe or a fireproof two-layer pipe joint provided in a through hole of a partition wall or a floor slab, It is an object of the present invention to provide a fire blocking function that prevents an influence from spreading to another room through a through hole such as a partition wall.

In the present invention, in order to solve the above-mentioned problem, a fireproof double-layer pipe or a fireproof double-layer pipe joint in which the periphery of a synthetic resin inner cylinder is coated with a fiber-mixed mortar and is penetrating into a through hole such as a partition wall of a building In the peripheral surface portion of the mortar coating of the fireproof double-layer pipe or the fireproof double-layer pipe joint corresponding to the through hole such as the partition wall, a sound-absorbing resin sheet and a flame-retardant felt sound-absorbing sheet are provided. A structure in which an inner layer of a sound-insulating sheet having an attached structure, and a fiber refractory adhesive sheet bonded to the sound-absorbing sheet of the sound- insulating sheet by being impregnated with an adhesive in an aluminum foil outer skin, a glass cloth, and a baked carbonized acrylic fiber fabric And an outer layer made of a fireproof sheet. The above-mentioned problem is that a fire-resistant paint is applied to the outer surface of the outer skin of the aluminum foil of the fire-resistant sheet to improve the fire resistance of the outer skin, or vinyl chloride, phthalate ester and calcium carbonate are added to the sound-insulating resin sheet. By using a sheet having a composition, and using a felt in which a phosphorus-based flame retardant and a petroleum-based resin are mixed in organic fibers such as cotton and rayon as the flame retardant felt, the problem can be solved more appropriately.

  The fireproof double-layer pipe or fireproof double-layer pipe joint of the present invention has a peripheral surface portion of the mortar covering corresponding to the through hole covered with the sound insulation sheet and the fireproof sheet having the above-described configuration. The water-absorbing sheet can be attached to the mortar coating by tightly fastening the sound-absorbing resin sheet and flame-retardant felt sound-absorbing sheet with heat-resistant and proof glass cloth. In addition, since the fireproof sheet protects the sound insulation sheet in the through hole with fire protection, the sound insulation sheet does not burn out in the event of a fire, and there is no gap between the inner surface of the through hole and the mortar coating. It is possible to prevent the influence of a fire from spreading through the through hole.

  Since these sound insulation sheets and fiber fireproof adhesive sheets are relatively flexible, they can be easily wound around fireproof double-layer pipes and fireproof double-layer pipe joints and have good workability. In addition, the baked carbonized acrylic fiber fabric constituting the fiber fireproof adhesive sheet is thin and has good fire resistance, so the outer diameter of the joint is reduced, and as a result, a small through hole is formed to form a joint, etc. Can be installed, making piping work easier. By overlaying the aluminum foil and glass cloth on the acrylic fiber cloth, the cloth can be prevented from being deformed and moisture can be prevented from penetrating into the cloth. Joints can be installed by piping.

  Applying fire-resistant paint to the outer surface of the aluminum foil skin of the fire-resistant sheet improves not only the fire resistance of the skin but also the weather resistance, and vinyl chloride, phthalate ester and calcium carbonate are composed on the resin sheet with sound insulation The object of the present invention can be achieved at a low cost by using a felt sheet in which an organic fiber such as cotton or rayon is mixed with a phosphorus flame retardant and a petroleum resin as a flame retardant felt. Can be achieved appropriately.

  The case where the embodiment of the present invention is applied to a fireproof two-layer pipe joint will be described. FIG. 1 is an overall external view of the fireproof two-layer pipe joint, and FIG. 2 is a cross-sectional view of FIG. Reference numeral 1 denotes a fireproof double-layer pipe joint in which a fiber-mixed mortar coating 3 is formed on the outer periphery of a hard synthetic resin inner cylinder 2, and three connection ports 4 for connecting branch pipes are provided on the side thereof. A vertical pipe connection port 5 is shown above and below. The number of connection ports 4 is arbitrary.

  As shown in FIG. 3, this fireproof two-layer pipe joint 1 is provided with piping equipment in a through state in a through hole 7 formed in a partition wall or a floor slab 6 of a building, and is filled with a filler 8 made of cement mortar. It is fixed in the through hole 7. Each of the connection ports 4 and 5 has a fire-resistant double-layer tube 11 having a configuration in which the periphery of the inner tube 9 made of hard synthetic resin as shown in the cross-sectional structure diagram of FIG. 4 is covered with an outer tube 10 made of fiber mortar. Connected. In the illustrated example, a sound insulation type fireproof double-layer tube in which a sound insulation material 12 is wound around the peripheral surface of the outer tube 10 is used. Reference numeral 22 denotes a thermally expandable joint material provided at each connection port 4.

  Since the fireproof double-layer pipe joint 1 is provided with a structure such as a blade for controlling the flow of the drainage, the water noise hitting it becomes noise, and also due to the flow in the fireproof double-layer pipe 11 Noise is generated. In order to prevent the inconvenience that these noises propagate to the floor slab 6 and the partition wall via the fireproof double-layer pipe joint 1 as well as to eliminate the influence of fire through the through-hole 7, the present invention can be seen in FIG. As described above, a sound insulation sheet 13 and a fireproof sheet 14 are provided on the peripheral surface portion of the mortar coating 3 of the fireproof two-layer pipe joint 1 corresponding to the through hole 7 of the partition wall or floor slab 6, and the sound insulation function and fire blocking in the through hole 7 are provided. Both function and waterproof function were added.

As shown in FIG. 5, the sound insulation sheet 13 is a resin sheet 17 such as a sheet having a thickness of about 1.5 mm and a density of 2 g / cm ³ , which is composed of vinyl chloride, phthalate ester, and calcium carbonate having sound insulation properties. It has a structure in which flame-retardant felt 18 such as 5mm-thick felt in which organic flame retardant such as cotton and rayon is mixed with organic flame retardant, phosphorus-based flame retardant, and petroleum resin is sequentially flame-retardant. The felt 18 is provided in a range corresponding to the peripheral area of the mortar coating 3 corresponding to the through hole 7. The noise generated in the fireproof two-layer pipe joint 1 is absorbed by the flame retardant felt 18 and further insulated by the resin sheet 17, and the sound leakage to the outside is negligible.

  The structure of the refractory sheet 14 is as shown in FIG. 6, and is a fiber in which a pressure sensitive adhesive is impregnated into a skin 19 of an aluminum foil having a thickness of about 20 μm, a glass cloth 20 of a reinforcing material, and a fired carbonized thin acrylic fiber cloth. The fireproof adhesive sheet 21 was layered. The outer surface of the fiber refractory adhesive sheet 21 is bonded so as to correspond to the surface of the sound insulation sheet 13, but since the glass cloth 20 is integrated with the fiber refractory adhesive sheet 21, the elongation of the fiber refractory adhesive sheet 21 is suppressed. Therefore, adhesion with good adhesion can be performed. Further, the outer skin 19 can prevent moisture from entering from the outside and maintain the shape of the thin fiber refractory adhesive sheet 21. A fire resistant paint 23 may be applied to the surface of the outer skin 19 to improve the fire resistance.

  The sound insulation sheet 13 and the fireproof sheet 14 are provided so as to cover the peripheral surface region of the fireproof two-layer pipe joint 1 located in the through hole 7, but for example, the entire peripheral surface of the fireproof two-layer pipe joint 1 beyond the region. These sheets 13 and 14 may be provided. If necessary, the sound insulation sheet 13 is provided on the entire outer surface of the fireproof two-layer pipe joint 1, and the fireproof sheet 14 is provided so as to cover the region corresponding to the through hole 7 and the entire mortar coating 3 below the region. Good. Further, the sound insulation sheet 13 covering the upper and lower regions of the through hole 7 may be constituted by separate sheets. In this case, the fireproof sheet 14 is overlaid on the entire outer surface of the lower sound insulation sheet 13. May be. Furthermore, these sound insulation sheets 13 may be formed in a cylindrical three-dimensional shape and mounted on site. When the mortar coating 3 is attached with an aluminum glass cloth in which an aluminum foil and a glass cloth are laminated so as to cover the upper ends of the sound insulating sheet 13 and the fireproof sheet 14, water penetration into the sound absorbing sheet 18 is prevented and water tightness is improved. . When the fireproof double-layer pipe is installed in the through hole 7, the same means as described above is used.

The diameter of the refractory double-layer pipe joint 1 having a large diameter portion of 182 mm and a small diameter portion of 178 mm, which is coated on a hard vinyl chloride inner tube 2 with fiber-mixed mortar 3, is formed on a floor slab having a thickness of 20 cm. It installed in the through-hole 7 of 20.9 cm. Prior to this installation, a resin sheet 17 having a density of 2 g / cm ³ and a thickness of 1.5 mm, and a cotton and phosphorus flame retardant and petroleum On a sound insulation sheet 13 composed of a flame retardant felt 18 made of resin, an aluminum foil outer skin 19 having a thickness of 20 μm, a glass cloth having a thickness of 90 μm, a density of 1.4 g / cm ³ and a thickness of 0 Bonded fire-resistant sheet 14 with a structure in which a fire-resistant adhesive sheet 13 of fired and carbonized acrylic fiber fabric (polyacrylonitrile fiber felt) impregnated with a pressure-sensitive and flame-retardant adhesive is successively laminated and laminated. And this was wound around the area | region corresponding to the through-hole 7 of the surrounding surface of the fireproof two-layer pipe joint 1, and it fastened with the aluminum glass cloth adhesive tape. The gap between the through hole 7 and the fireproof sheet 14 was filled with a cement mortar filler 8.

  Although an ordinary amount of water was passed through the fireproof double-layer pipe joint 1, the noise transmitted to the floor slab was very small and there was no problem for ordinary people. For comparison, when the same amount of water was passed through a fireproof two-layer pipe joint having a conventional structure without the sound insulation sheet 13 and the fireproof sheet 14, some water flow noise was heard in a quiet time zone such as midnight. Moreover, although the fire condition of 1000 degreeC was produced in the room | chamber under the floor slab, the thing of this invention does not generate a clearance gap between the circumference | surroundings of the fireproof two-layer pipe joint 1, and the inner surface of the through-hole 7, There was no flame or smoke reaching the upper chamber through the floor slab.

Side view of a fireproof two-layer pipe joint used in the practice of the present invention Sectional view of FIG. Sectional view of an embodiment of the present invention Cross section of refractory double-layer pipe Illustration of sound insulation sheet Explanatory drawing of fireproof sheet

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Fireproof double layer pipe joint, 2 Inner cylinder, 3 Covering, 7 Through-hole, 13 Sound insulation sheet, 14 Fireproof sheet, 17 Resin sheet, 18 Sound absorption sheet, 19 Outer skin, 20 Glass cloth, 21 Fiber fireproof adhesive sheet,

Claims (3)

A fire-resistant double-layer pipe or a fire-resistant double-layer pipe joint in which the periphery of an inner cylinder made of synthetic resin is coated with fiber-mixed mortar and installed in a through-hole such as a partition wall of a building, An inner layer of a sound insulating sheet having a structure in which a sound-absorbing resin sheet and a sound-absorbing sheet of flame-retardant felt are attached to a peripheral surface portion of a mortar coating of a fire-resistant double-layer pipe or a fire-resistant double-layer pipe joint corresponding to the through-hole, An outer layer made of a fireproof sheet having a structure in which an aluminum foil shell, a glass cloth, and a fired carbonized acrylic fiber fabric are impregnated with an adhesive and a fiber fireproof adhesive sheet bonded to the sound absorbing sheet of the sound insulating sheet are laminated. A fireproof double-layer pipe or a fireproof double-layer pipe joint for penetrating parts.   The fire-resistant double-layer pipe or fire-resistant double-layer pipe joint according to claim 1, wherein a fire-resistant paint is applied to the outer surface of the outer skin of the aluminum foil of the fire-resistant sheet.   Use a sheet of vinyl chloride, phthalate ester, and calcium carbonate as the resin sheet having the above sound insulation properties, and use a phosphorus flame retardant and petroleum resin as an organic fiber such as cotton or rayon as a flame retardant felt. The fire-resistant double-layer pipe or the fire-resistant double-layer pipe joint for penetrating parts according to claim 1, wherein felt mixed in is used.

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