JP4543134B2 - Connection structure of fireproof soundproof drainage pipe and fireproof soundproof drainage pipe joint - Google Patents

Description

  The present invention relates to a connection structure between a drain pipe and a drain pipe joint having both fire resistance and sound insulation.

Conventionally, in order to prevent the spread of fire as a drainage pipe of high-rise houses and office buildings, it has been required to use a fireproof drainage pipe and pipe joint, and as a drainage pipe and pipe joint satisfying this requirement, Fire-resistant double-layer pipes and fire-resistant double-layer pipe joints having a structure in which a hard vinyl chloride inner pipe is covered with fiber-mixed mortar are commercially available. However, in such a fireproof double-layer pipe, the sound of the drainage flowing through the inside of the pipe is somewhat leaked outside the pipe. When there is a need for quietness, a glass wool sound insulation sheet is wrapped around the drain pipe. And fixing with a mesh wire mesh. In addition, a sound insulation drain pipe and a sound insulation drain pipe joint having a structure in which the outer peripheral surface of a synthetic resin drain pipe or pipe joint is directly covered with a sound insulation sheet are also known.
JP 2002-139176 A

  The fireproof double-layer pipe and fireproof double-layer pipe joint with the above-mentioned structure have sufficient fire resistance, but it takes time to wrap the sound insulation sheet to eliminate the inconvenience that noise due to drainage leaks outside the pipe. There was a drawback of poor nature. An object of the present invention is to provide a connection structure between a drain pipe and a drain pipe joint that has both fire resistance and sound insulation of drain noise.

  In the present invention, a resin having a sound insulation function is formed in close contact with the outer periphery of the inner tube of the hard synthetic resin constituting the drainage pipe and the outer circumference of the inner tube of the hard synthetic resin constituting the drainage pipe joint, and the sound insulation functional resin A fireproof sound insulation drainage pipe and a fireproof sound insulation drainage pipe joint are formed by providing a layer of fiber-mixed mortar with a gap on the layer, and the fireproof sound insulation and drainage pipe joint is connected. In a connection structure in which a threaded portion is formed at the end of the connection port of the drainage pipe joint, and a synthetic resin fastening ring for fastening the fireproof and soundproof drainage pipe connected to the connection port is screwed thereto, Adhesive bonding between the fiber-reinforced mortar layer of the fireproof and soundproof drainage pipe and the fireproof and soundproof drainage pipe joint and the peripheral surface of the fastening ring made of synthetic resin. Tape-like with By covering with fire resistant joints, and so as to solve the above problems.

  When manufacturing a fireproof and soundproof drainage pipe, by inserting the inner pipe in which the resin having the sound insulation function is formed in a layered manner into a cylinder formed by a fiber-mixed mortar having an inner diameter larger than the outer diameter of the inner pipe. A layer of the gap and fiber-mixed mortar can be formed. When an elastic body such as a rubber band is interposed in the gap in a compressed state, the slide of the cylinder and the inner tube can be controlled, and piping work is easy. become. In addition, when producing a fireproof and soundproof drainage pipe joint, a paper sheet is wound around the inner pipe connection port and the outer periphery of the drainage pipe joint in which the resin having the sound insulation function is formed in close contact with the layer, and is installed in the mold. By injecting the mixed mortar between the outer peripheral surface of the inner tube and the mold, the gap and the fiber mixed mortar layer can be formed.

  According to the present invention, the outer periphery of the rigid synthetic resin inner pipe of the drain pipe or drain pipe joint is covered with a resin having a sound insulation function, and a layer of fiber-mixed mortar is formed with a gap above the sound insulation function resin layer. As a result, it is possible to obtain a fireproof and soundproof drainage pipe or fireproof and soundproof drainage pipe joint that has both fire resistance by the fiber-mixed mortar layer and sound insulation by the sound insulation functional resin layer. The fiber-containing mortar layer and the gap can be easily formed by inserting a fiber-containing mortar cylinder into the inner tube or by molding, thereby reducing the manufacturing cost. Moreover, the sound insulation is further improved by providing a gap in addition to the sound insulation functional resin layer.

  By interposing a compressed elastic body in the gap between the inner pipe covered with the resin having the sound insulation function and the cylinder formed by the fiber-mixed mortar, the inner pipe of the fireproof sound insulation drain pipe and the slide of the cylinder are controlled, The cylinder can be prevented from coming off or can be cut by sliding the cylinder with respect to the inner pipe during piping work.

  In the case of a drainage pipe joint, a paper sheet is wrapped around the outer periphery of the inner pipe connection port covered with a resin having a sound insulation function and placed in the mold, and the fiber-containing mortar is placed between the outer peripheral surface of the inner pipe and the mold. By injecting into the gap, the gap and the fiber-mixed mortar layer can be easily formed.

Covering the cuts and fastening rings of the fiber-mixed mortar layer at the connection between the fireproof and soundproof drainage pipes and the fireproof and soundproof drainage pipe joints with adhesive tape-like fireproof joints will cause the heat of the fire to reach the inner pipe Can be prevented and fire resistance is improved.

  The embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 show an embodiment applied to a straight tubular drain pipe, and the reference numeral 1 is made of a hard synthetic resin that constitutes a fireproof and sound insulating drain pipe 7. The inner pipe, reference numeral 2 is a resin having a sound insulation function provided so as to cover the outer periphery of the inner pipe 1, and reference numeral 3 is a fiber-mixed mortar layer provided on the layer of the sound insulation function resin 2 with a gap 4 therebetween. is there. The fiber-mixed mortar layer 3 functions as a fire-resistant layer that prevents the inner pipe 1 from being melted in the event of a fire, and can prevent the inconvenience of downstairs fire smoke flowing into the upper floor through the melted inner pipe 1.

  The inner tube 1 is made of, for example, hard vinyl chloride, and a resin 2 having a sound insulation function that covers the outer peripheral surface of the inner tube 1 is, for example, a soft resin in which a plasticizer is added to vinyl chloride and an inorganic substance is added as necessary. Is used, and the sound insulation functional resin 2 is formed in a layered manner on the outer periphery of the inner tube 1 by a method such as coating, extrusion molding, or die molding. Examples of the mortar of the fiber-mixed mortar layer 3 include fiber-mixed mortar obtained by kneading a raw material composed of ordinary Portland cement 64%, aggregate 21%, inorganic fiber 10%, and organic fiber 5% so as to have a moisture content of 28%. used. A cylinder 5 having an inner diameter slightly larger than the outer diameter of the inner tube 1 in which the layer of the sound insulation functional resin 2 is formed by the fiber-mixed mortar is formed, and the inner tube 1 is formed in the cylinder 5 as shown in FIG. The fiber mixed mortar layer 3 with the gap 4 interposed therebetween was formed on the sound insulating functional resin 2 layer. Further, in order to maintain the gap 4, a rubber band having a diameter larger than that of the gap 4 is fitted on the sound insulating functional resin 2 layer of the inner tube 1 or a hot melt adhesive is made higher than the height of the gap 4. After the elastic body 6 is provided by applying it in an annular shape and the cylinder 5 is inserted while compressing the elastic body 6, the cylinder 5 can be slid onto the layer of the sound insulation functional resin 2 by the elasticity of the elastic body 6. And a uniform gap 4 was formed.

  The embodiment shown in FIGS. 3 to 5 is a cross-sectional view of an example in which the present invention is applied to various types of fireproof and soundproof drainage pipe joints 8. In these examples, the sound insulation functional resin 2 made of a soft resin in which, for example, a plasticizer is added to vinyl chloride and an inorganic substance or the like is added to the outer peripheral surface of the joint inner pipe 9 made of hard vinyl chloride is applied. The inner tube 9 is formed in close contact with the outer periphery of the inner tube 9 by any method such as extrusion molding or mold molding, and this is set in the mold 12 as shown in FIG. A fireproof and soundproof drainage pipe joint was manufactured by injecting the mixed mortar into the gap between the outer peripheral surface of the inner pipe 9 and the mold 12 through the introduction hole 31. In this case, prior to setting the inner tube 9 on which the sound insulating functional resin 2 is formed in the mold 12, it is relatively water-absorbing on the outer periphery of the connection port 10 of the inner tube 9 on the layer of the sound insulating functional resin 2. A paper sheet 11 such as a good drawing paper is wound, and a fiber mixed mortar layer 3 is formed on the paper sheet 11. After the drainage pipe joint 8 is removed from the mold 12, the paper sheet 11 absorbs moisture from the fiber-mixed mortar layer 3 of the uncured drainage pipe joint 8, and then is cured and cured. When the layer 3 is dried and cured, the paper sheet 11 dries and shrinks, so that a gap 4 as shown in FIG. 3 is formed between the fiber-mixed mortar layer 3 and the sound insulating functional resin 2 layer. When a paper sheet 11 made of white paperboard is used, its thickness increases by about 49.1% due to water absorption, and by appropriately adjusting the area around which the paper sheet 11 is wound, the position of the gap 4 to be formed can be The entire surface of the layer of the functional resin 2 or a partial layer can be arbitrarily controlled.

  The gap 4 formed in the drainage pipe joint 8 is when the fiber mixed mortar layer 3 is damaged by the thermal expansion of the inner pipe 9 or the sound insulation functional resin 2 or when the fireproof and soundproof drainage pipe 7 is fitted into the connection port 10. Further, the inner tube 9 is prevented from being deformed and the layer 3 is prevented from being damaged, and the vibration of the inner tube 9 due to drainage is blocked, so that the drainage noise is not easily transmitted to the outside. The gap 4 does not need to extend over the entire outer surface of the sound insulation functional resin 2 and may be formed in a portion close to the connection port 10. A threaded portion 13 is formed at the end of the connection port of the drainage pipe joint 8 shown in the figure, and a fastening ring 14 made of synthetic resin is screwed there. After the drainage pipe 7 is connected, the ring 14 is tightened. The packing 30 provided at the end of the connection port is crushed and the drain pipe 7 is prevented from coming off.

  The fireproof and soundproof drainage pipe 7 and the fireproof and soundproof drainage pipe joint 8 of the present invention are connected as shown in FIG. 7, for example, and the cuts 15 and 15 of the mortar layer of the joint between the drainage pipe 7 and the joint 8 have adhesiveness. Tape-like fire-resistant joints 16 and 16 are wound so that the heat of the fire does not reach the sound insulation functional resin 2 and the inner pipes 1 and 9. As the fireproof joint 16, a fiber fireproof adhesive layer 19 in which an acrylic fiber fabric fired and carbonized through a mesh 18 of flame retardant fiber is impregnated with an adhesive on one surface of an aluminum foil 17 as shown in FIG. Construction is facilitated by using a thin, strong, and flexible joint with a structure provided with the. The drainage pipe 7 and the drainage pipe joint 8 connected in the state of FIG. 7 are provided through the concrete wall 20 having a thickness of 100 mm, and the right heating chamber 21 is heated to 1050 ° C. for 120 minutes to perform a fire resistance test. However, no flame was ejected into the non-heated chamber 22. The outer diameter of the fireproof and soundproof drain pipe 7 located in the right heating chamber 21 is 102 mm.

  In order to confirm the sound insulation, the fireproof and sound insulation drain pipe 7 having the structure of FIGS. 1 and 2 having a length of 1 m and an outer diameter of 129 mm is set in the test apparatus 23 of FIG. 0 liter / second of water was flowed and the noise was measured by the microphone 24. The microphone 24 was set to 10 mm and 150 mm from the drain pipe 7. As a result, at 1.5 liters / second, the microphone at the 10 mm position was 46.4 db and the microphone at the 150 mm position was 42.4 db. At 3.0 liters / second, the value was 48.4 db for the microphone at the 10 mm position and 43.9 db for the microphone at the 150 mm position. For comparison, when a drainage pipe having a structure in which the fiber-mixed mortar cylinder 5 of the fireproof and soundproofing drainage pipe 7 shown in FIGS. At liters / second, the microphone at the 10 mm position was 54.1 db and the microphone at the 150 mm position was 46.6 db. At 3.0 liters / second, the microphone at the 10 mm position was 55.4 db, and the microphone at the 150 mm position was 47.4 db. In any noise measurement, the background noise is 38 db.

  From the above test, it is clear that the fireproof and soundproof drainage pipe of the present invention has sufficient fireproof and soundproof properties. Moreover, it can be estimated that the fireproof and soundproof drainage pipe joint has a fireproof and soundproof performance equivalent to that of the fireproof and soundproof drainage pipe because the cross-sectional structure of the fireproof and soundproof drainage pipe is similar.

Cutaway side view showing an embodiment of the fireproof and soundproof drainage pipe of the present invention Sectional drawing of the 2-2 line part of FIG. Cut-away side view of the fireproof and soundproof drainage pipe joint of the present invention Cut-away side view of fireproof and sound insulation drainage pipe joint for connecting different diameter pipes of the present invention Cut-away side view of a fire and sound insulation drainage pipe joint for connecting the same diameter pipe of the present invention Cut-away side view of mold-molded state of fireproof and soundproof drainage pipe joint of the present invention Explanatory drawing of the fireproof test state where the fireproof soundproof drainage pipe and the fireproof soundproof drainage pipe joint of the present invention are connected Illustration of fireproof joint used to connect fireproof sound insulation drain pipe and fireproof sound insulation drain pipe joint Illustration of noise test

Explanation of symbols

  1 Inner pipe, 2 resin with sound insulation function, 3 layer of fiber mixed mortar, 4 gap, 5 cylinder, 7 fireproof sound insulation drainage pipe, 8 fireproof sound insulation drainage pipe joint, 9 joint inner pipe, 10 connection port, 11 paper sheet, 12 molds, 15 cuts, 16 fireproof joints,

Claims (2)

  A resin having a sound insulation function is formed in close contact with the outer periphery of the inner pipe of the hard synthetic resin constituting the drainage pipe and the outer circumference of the inner pipe of the hard synthetic resin constituting the drainage pipe joint. A fireproof sound insulation drain pipe and a fireproof sound insulation drain pipe joint are formed by providing a layer of fiber-mixed mortar with a gap between the fireproof sound insulation drainage pipe joint and the fireproof sound insulation drainage pipe joint connected to the fireproof sound insulation drainage pipe joint. In the connection structure in which a threaded portion is formed at the end of the connection port, and a synthetic resin fastening ring for tightening the fireproof soundproof drainage tube connected to the connection port is screwed thereto, these fireproof soundproof drainage tubes A tape-like tape with adhesive properties on the cut surface of the fiber-mixed mortar layer of the fireproof and soundproof drainage pipe and the fireproof and soundproof drainage pipe joint, and the peripheral surface of the synthetic resin fastening ring. With fireproof joints Connection structure of the refractory sound insulation drain pipe and the refractory soundproof drainage fittings, characterized in that Tsu.   Place the gap between the fireproof and soundproof drainage pipe joint and the layer of fiber-mixed mortar in the mold by winding a sheet of paper around the inner pipe connection port of the drainage pipe joint in which the resin with sound insulation function is formed in close contact. 2. The connection structure between a fireproof and soundproof drainage pipe joint and a fireproof and soundproof drainage pipe joint according to claim 1, wherein the fiber mixed mortar is formed by pouring between the outer peripheral surface of the inner pipe and a mold.

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