JP4463073B2 - Refractory double-layer pipe - Google Patents

Description

  The present invention relates to a fireproof two-layer pipe having a configuration in which an outer pipe made of fiber-mixed mortar is slidably mounted on the outer periphery of an inner pipe made of synthetic resin.

  The fireproof double-layer pipe with the above structure can withstand the heat of fire of about 1,200 ° C, has high safety in fire prevention and disaster prevention, and the outer pipe is slidable, so adjustment by cutting the pipe length is easy. However, there is an inconvenience that the noise of the drainage water flowing inside the inner pipe leaks to the outside of the outer pipe. When used for buildings such as high-rise houses and hotels where quietness is required, A sound insulation type fireproof double-layer pipe manufactured by wrapping a soundproof sheet around the outer peripheral surface of the outer pipe after the fireproof double-layer pipe is installed, or by producing a sound insulation material between the inner pipe and the outer pipe. This is prevented by using it (see Patent Documents 1 and 2).

In addition, since the outer tube is made of fiber-mixed mortar, moisture slightly penetrates into the surface of the outer tube, which is not preferable because it causes mold.
Utility Model Registration No. 3036449 Japanese Patent No. 3156661

  When the sound insulation sheet is wrapped after the fireproof double-layer pipe construction, there is a disadvantage that the time until the completion of the piping work is prolonged, and the fireproof double-layer pipe with the structure in which the sound insulation material is interposed between the inner pipe and the outer pipe, Because the gap between the inner and outer pipes becomes large, the inner and outer pipes fit together in a floating state, paying attention to the falling off of the inner pipe when transporting a fireproof double-layer pipe or installing it as a standing pipe. There was a need. In addition, in the conventional fireproof double-layer pipe provided with the outer pipe made of slidable fiber-mixed mortar, no consideration is given to preventing moisture from penetrating into the outer pipe.

  The present invention provides a fireproof double layer including an outer tube made of fiber-mixed mortar that has good sound insulation, prevents water penetration into the outer tube, and can be easily manufactured so that the gap between the inner tube and the outer tube does not increase. The object is to provide a tube.

    In the present invention, in order to solve the above problems, an outer tube made of fiber-mixed mortar is slidably mounted on the outer periphery of the inner tube made of synthetic resin, and the outer skin of the aluminum foil and sound insulation are provided on the outer peripheral surface of the outer tube. A fireproof two-layer pipe in which a waterproof soundproof sheet having a structure in which a resin sheet and a sound absorbing sheet of a flame-retardant felt are sequentially attached are joined to each other on the winding start side and the winding end side of the waterproof soundproof sheet In addition, the aluminum foil is protruded from the sound-absorbing sheet and the heat-resistant adhesive of the waterproof sound-insulating sheet wrapped around the outer tube is applied, and the resin sheet and the end of the sound-absorbing sheet are sealed for waterproofing. Formed. It is preferable that a flame retardant fiber mesh is adhered to the entire surface of the outer surface of the waterproof sound insulating sheet on the resin sheet side.

  The fireproof double-layered pipe of the present invention is an outer periphery of an outer tube made of mortar mixed with a fiber, which is a waterproof sound-insulating sheet having a structure in which an aluminum foil outer shell, a sound-insulating resin sheet, and a flame-retardant felt sound-absorbing sheet are sequentially attached Since it is wrapped around the surface and the moisture is blocked by the outer skin of the aluminum foil and does not penetrate into the outer tube, the outer tube can be maintained in a dry state, so that generation of mold can be prevented, and a sound-insulating resin sheet and sound absorption Since the sheet is affixed to the outer skin of the aluminum foil to form an integral waterproof sound insulation sheet, the sound insulation and waterproof properties can be processed at once by wrapping the sheet around the outer tube and joining. Further, since the surface is an aluminum foil, there are obtained effects that it has heat reflectivity, flame retardancy, and water repellency, is hardly soiled and does not generate mold. Since the waterproof sound-insulating sheet is joined to the peripheral surface of the outer tube of the fireproof two-layer tube, a member for controlling the sliding of the inner tube and the outer tube can be interposed in the gap between the inner tube and the outer tube as in the past. Sliding of the inner pipe can be prevented during transportation and construction. The end of the resin sheet and the sound absorbing sheet wound around the outer tube can be sealed inside the aluminum foil by forming the sealing allowance by protruding the aluminum foil on the winding start side and the winding end side of the waterproof sound insulation sheet. . Furthermore, by attaching a mesh of flame retardant fiber such as glass fiber to the entire surface of the resin sheet side of the aluminum foil of the waterproof sound insulating sheet, a durable material that can withstand pulling and breakage can be obtained.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. In FIGS. 1 and 2, reference numeral 1 denotes a fireproof double layer having a configuration in which an outer tube 3 made of fiber-mixed mortar is inserted into the outer periphery of an inner tube 2 made of synthetic resin. Show the tube. A gap 4 is provided between the inner tube 2 and the outer tube 3 of the refractory double-layer tube 1, and a slide control member for enabling the inner tube 2 and the outer tube 3 to slide in the gap 4 in the axial direction. 5 is interposed. The slide control member 5 has a configuration in which an elastic body such as a rubber band applied to the outer periphery of the inner tube 2 or a hot melt rubber applied linearly to the outer periphery is crushed by the outer tube 3. When a sliding force is applied to slide the outer tube 3 relatively, the rubber rubber slide control member 5 rotates within the gap 4 and slides like a roller.

  As described above, the noise of the drainage flowing through the inner pipe of the fireproof double-layer pipe is covered with a conventional sound insulation sheet, or a sound insulation material is provided between the inner pipe and the outer pipe. When sound insulation is used, it takes time for construction and is accompanied by inconveniences such as inability to control sliding of the inner tube and outer tube.In the present invention, this inconvenience is solved and the disadvantage that moisture enters the outer tube of the fiber-mixed mortar is eliminated. As shown in FIGS. 3 and 4, a skin 6 made of aluminum foil, a resin sheet 7 having a sound insulating property, and a sound absorbing sheet 8 made of a commercially available flame retardant felt such as a flame retardant resin are used, for example. A waterproof sound-insulating sheet 9 was prepared by integrally sticking with a heat-resistant adhesive, and this was coated with a heat-resistant adhesive, wrapped around the outer peripheral surface of the outer tube 3 and joined. An acrylic adhesive or the like is used as the heat resistant adhesive.

As the resin sheet 7 having a sound insulation property, for example, a 1.5 mm thick sheet obtained by adding a plasticizer and a high specific gravity metal material to vinyl chloride resin is used. For the sound absorbing sheet 8, for example, a thickness of 5 mm, 205 g is used. A flame retardant felt of / m ² is used. The resin sheet 7 and the sound absorbing sheet 8 were pasted in advance with a heat-resistant adhesive, and this was joined to the aluminum foil outer skin 6 with a heat-resistant adhesive.

  The aluminum foil of the outer skin 6 is suitable to have a thickness of about 20 microns which is flexible and does not easily break. In order to increase the strength, glass fiber or the like is provided on the entire surface of the outer skin 6 on the resin sheet 7 side. A mesh 10 made of a flame-retardant fiber having a high tensile strength was attached.

  The manufacturing method of the outer tube 3 made of fiber-mixed mortar is the same as the manufacturing method of the conventional outer tube of the fireproof double-layered tube, for example, 64% ordinary portland cement, 21% aggregate, 10% inorganic fiber, 5% organic fiber. It is manufactured by winding a raw sheet of fiber-mixed mortar prepared by kneading a raw material made of the above to a moisture content of 28% and winding it around a mandrel and drying and curing it with the mandrel attached. The outer tube 3 is fitted to the inner tube 2 provided with the slide control member 5 on the peripheral surface to complete the fire-resistant double-layer tube 1, and the fire-resistant double-layer tube 1 is rolled into rolls 11, 12 as shown in FIGS. The waterproof sound-insulating sheet 9 in which the adhesive is applied to the inner surface extending from the outer skin 6 to the sound-absorbing sheet 8 is wound around while rotating. The winding start side and the winding end side of the waterproof sound-insulating sheet 9 are used for facilitating the winding and for enclosing the resin sheet 7 and the sound-absorbing sheet 8 in the enveloping direction 6 without opening them to the outside. The aluminum foil of the outer skin 6 was protruded to both, and the sealing allowances 13 and 13 were formed. With this configuration, after the pipe construction of the fireproof double-layer tube 1, moisture does not enter the sound-absorbing sheet 8 made of flame-retardant felt from which the moisture hardly evaporates from other than both ends of the tube. Since it is sealed with the material, the sound absorbing sheet 8 can be sealed and the dry state at the time of manufacture can be maintained. As a result, the inconvenience of moisture entering the outer tube 3 can be eliminated. Reference numeral 14 in FIGS. 5 and 6 is a table on which the waterproof sound insulation sheet 9 is placed.

Two layers of fire-resistant mortar made of fiber-mixed mortar with a length of 2000 mm, an inner diameter of 115.5 mm, and a thickness of 6.5 mm, which is fitted to the inner tube 2 made of hard vinyl chloride with a length of 2100 mm, an outer diameter of 114 mm, and a thickness of 6.6 mm A waterproof and sound-insulating sheet 9 was wrapped around and joined to the outer periphery of the outer tube 3 of the tube 1 using a heat-resistant acrylic adhesive. The waterproof and sound-insulating sheet 9 has a thickness of 1.5 mm and has a sound insulating property made of vinyl chloride in which iron powder is mixed with a skin 10 made of aluminum foil having a thickness of 20 microns through a flexible glass fiber mesh 10. A resin sheet 7 and a resin-made sound absorbing sheet 8 made of 200 g / m ² , 5 mm thick flame-retardant felt are sequentially attached with a heat-resistant adhesive. A sealing allowance 13 of 50 mm was formed on each end side.

  The fireproof double-layer pipe having a structure excluding the waterproof sound insulation sheet 9 from the fireproof double-layer pipe 1 is a conventional fireproof double-layer pipe. It does not spread to the fire. This fireproof double-layer tube 1 is installed in the noise measurement chamber having the configuration shown in FIG. 7, and when measuring the noise with the microphone 16 at a position 10 cm away by flowing 1 liter / second of water, a noise of 36.9 db is measured. It was done. The noise when the amount of water was increased to 2 liters / second was 41.5 db. In any case, the background noise was 30.4 db. Further, for comparison, when a fireproof double-layer pipe from which the waterproof sound-insulating sheet 9 was removed was provided in this noise measurement chamber and a water amount of 2 liters / second was flowed, a noise of 46.3 db was measured. The background noise at this time was 27.3 db. From this, it can be seen that the fireproof double-layer tube of the present invention has sufficient sound insulation performance.

  Further, the inside of the noise measurement chamber was kept in a high temperature and humidity state, left for 30 days, and then decomposed to observe the inside. However, the sound absorbing sheet 8 and the outer tube 3 were not different from those at the time of manufacture. Since the slide control member 5 is provided in the gap 4 between the inner tube 2 and the outer tube 3, it can be slid with respect to the inner tube 2 only when an appropriate sliding force is applied to the outer tube 3. The outer tube 3 did not slide when no sliding force was applied at the time or during construction.

Partially cutaway side view showing an embodiment of the present invention Fig. 1 is an enlarged longitudinal sectional view with details of the main part. Cross section of waterproof sound insulation sheet 3 is an enlarged perspective view of the main part of FIG. Plan view of the wound and joined state of the waterproof sound insulation sheet Side view of FIG. Illustration of noise measurement status

Explanation of symbols

  1 fireproof double-layer pipe, 2 inner pipe, 3 outer pipe, 4 gap, 5 slide control member, 6 outer shell made of aluminum foil, 7 resin sheet, 8 sound absorbing sheet, 9 waterproof sound insulating sheet, 10 mesh, 13 encapsulation allowance,

Claims (2)

  A fiber-mixed mortar outer tube is slidably mounted on the outer periphery of the synthetic resin inner tube, and an outer surface of the outer tube is made of an aluminum foil skin and a sound insulating resin sheet and a flame retardant felt sound absorbing sheet. In the fireproof two-layer pipe, which is wound and joined with a waterproof sound insulation sheet having a structure in which the waterproof sound insulation sheet is sequentially attached, the above aluminum foil protrudes from the resin sheet and the sound absorbing sheet on the winding start side and the winding end side of the waterproof sound insulation sheet. Fireproof two-layer characterized by forming a sealing allowance for waterproofing by enclosing the ends of the resin sheet and the sound-absorbing sheet and applying the heat-resistant adhesive of the waterproof sound-insulating sheet wound around the outer tube tube.   The fireproof double-layer tube according to claim 1, wherein a mesh of flame retardant fibers is attached to the entire surface of the outer surface of the waterproof sound insulation sheet on the resin sheet side.

Images