JP2011094642A - Piping structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping structure in a partitioned through part, which has fire resistance and can reduce solid-borne sound. <P>SOLUTION: The piping structure C in a partitioned through part includes a sheath pipe 60 made of a fireproof resin composition of a polyvinyl chloride resin containing thermally expansive graphite, an inner pipe 40 inserted into the sheath pipe 60 with the outer diameter thereof made smaller than the inner diameter of the sheath pipe 60, and a spacer 50 inserted into the gap 70 formed between the sheath pipe 60 and inner pipe 40. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a piping structure mainly formed in a slab penetrating portion where piping penetrates a slab.

  Conventionally, when piping such as drain pipes is installed in a building, a penetration part (partition penetration part) that penetrates the pipe is provided on the floor, wall, partition, etc. of the building, and the piping is penetrated through this penetration part. After that, fire prevention measures are often taken to fill the gap with mortar so that no gap is formed between the penetrating portion and the pipe.

  However, if synthetic resin pipes are used, the fire resistance is inferior, so the pipe itself burns and burns out or is thermally deformed in the event of a fire. , Smoke etc. will be transmitted.

  Therefore, for example, in Patent Documents 1 and 2, a piping material for construction composed of a fire-resistant resin composition in which a heat-expandable graphite is contained in a polyvinyl chloride resin, and a fire-resistant resin composition in a single layer. The piping material for construction provided with the fireproof expansion layer comprised by this is disclosed. According to these configurations, the pipe itself is difficult to burn, and the gap between the penetrating portion and the pipe can be reliably closed to prevent the spread of fire.

JP 2009-40940 A JP 2008-180068 A

  By the way, in recent years, solid propagation sound that is propagated through a pipe penetration as a drainage noise often becomes a problem. However, since the configurations of Patent Documents 1 and 2 described above do not particularly take into account the solid propagation sound through the penetrating portion, they did not have a function of reducing the solid propagation sound.

  Then, this invention aims at providing the piping structure which can reduce solid propagation sound while having fire resistance.

  In order to achieve the above-mentioned object, the piping structure in the partition through portion of the present invention comprises a refractory resin composition in one layer of a sheath tube or a multilayer made of a refractory resin composition containing a thermally expandable graphite in a synthetic resin. A sheath tube provided with a fireproof expansion layer made of a material, an inner tube having an outer diameter smaller than the inner diameter of the sheath tube and inserted inside the sheath tube, and formed between the sheath tube and the inner tube And a spacer inserted into the formed gap.

  In addition, the spacer includes a flange portion that contacts the end surface of the sheath tube and seals the space, and a cylindrical insertion portion that is inserted into the space from the end portion of the sheath tube. Can do.

  Further, the gap may be filled with a sound absorbing material.

  And when using the joint which has a branch pipe as said inner pipe, it can be set as the structure by which a vibration proof member is installed in the contact location of the said branch pipe and slab in the state embed | buried under the slab of a building. .

  As described above, the piping structure in the partition through portion of the present invention has a fire-resistant expansion composed of a fire-resistant resin composition comprising a fire-resistant resin composition containing a heat-expandable graphite in a synthetic resin. A sheath tube having a layer, an inner tube having an outer diameter smaller than the inner diameter of the sheath tube and inserted inside the sheath tube, and a spacer inserted into a gap formed between the sheath tube and the inner tube It is equipped with.

  Therefore, in the event of a fire, the sheath tube is thermally expanded to block the penetration part, and in addition to having fire resistance, solid waste noise is generated by absorbing the drainage noise generated in the inner tube by the gap between the inner tube and the sheath tube. Can be reduced.

  Further, the spacer has a configuration including a flange portion that contacts the end surface of the sheath tube and seals the gap, and a cylindrical insertion portion that is inserted into the gap from the end portion of the sheath tube. While maintaining the width of the gap, the sheath can be prevented from coming off, and both ends of the gap can be sealed by the flange.

  Furthermore, since the space is filled with the sound absorbing material, the drainage noise can be further reduced.

  And when using the joint which has a branch pipe as an inner pipe, it is set as the structure where a vibration isolator is installed in the contact part of a branch pipe and a slab in the state embedded in the slab of a building. It is possible to prevent the drainage noise from being transmitted to the slab.

It is sectional drawing explaining the structure of the piping structure of Example 1. FIG. It is explanatory drawing explaining the whole structure of a piping system. It is a disassembled perspective view which decomposes | disassembles and demonstrates the structure of the piping structure of Example 1. FIG. It is sectional drawing explaining the structure of the piping structure of Example 2. FIG. It is sectional drawing explaining the structure of the piping structure of Example 3. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the whole structure of the single pipe | tube type drainage system S as a piping system provided with the piping structure C of this invention is demonstrated using FIG.

  Generally, piping systems used for drainage include a two-pipe drainage system and a single-pipe drainage system.

  Among these, the two-pipe drainage system uses a vent pipe separately from the drain pipe, and reduces pressure fluctuations in the pipe by a loop vent system using a loop vent pipe to reduce the induction siphon action.

  On the other hand, since the single-pipe drainage system S described in the present embodiment is a system that does not use a vent pipe, the drain pipe must also serve as a vent pipe. Therefore, it is important to secure a cross section for this ventilation.

  Specifically, as shown in FIG. 2, the single-pipe drainage system S does not generate excessive pipe pressure with drain pipes 21, 22,... Such a special-shaped collecting pipe joint 31 and leg joint 32 are provided.

  The single-pipe drainage system S is formed with a piping structure C that penetrates the slab 10 between the upstream drainage pipe 22 and the downstream drainage pipe 23. In addition, as a piping structure of the present invention, a piping structure penetrating in a horizontal direction with respect to a vertical wall has substantially the same operations and effects, but description thereof is omitted below.

  The pipe structure C of the present example has a sheath tube 60 made of a refractory resin composition in which a thermally expandable graphite is contained in a polyvinyl chloride resin, and an outer diameter smaller than the inner diameter of the sheath tube 60. An inner tube 40 to be inserted inside the tube 60 and a spacer 50 to be inserted into a gap 70 formed between the sheath tube 60 and the inner tube 40 are provided.

  The sheath tube 60 is formed in a cylindrical shape by a material having a property of expanding when receiving heat in a fire or the like, and has an inner diameter larger than the outer diameter of the inner tube 40.

  Specifically, in order not to directly transmit vibration, the cylindrical gap 70 formed between the sheath 60 and the inner tube 40 should have a thickness of at least about 1 mm, but about 5 mm should be secured. preferable.

  Here, as a material constituting the sheath tube 60, a fire resistant resin composition in which a polyvinyl chloride resin contains thermally expandable graphite, or a fire resistant expandable layer composed of a fire resistant resin composition in a single layer. A thing provided with can be used.

  Specifically, as the former, a refractory resin composition containing 1 to 10 parts by weight of thermally expandable graphite is used with respect to 100 parts by weight of the polyvinyl chloride resin (Patent Document 2). reference).

  Moreover, as the latter, the fireproof expansion which consists of a fireproof resin composition which contains 1-10 weight part of thermally expansible graphite adjusted to pH1.5-4.0 with respect to 100 weight part of polyvinyl chloride-type resin. A thing provided with a layer is used (refer to patent documents 1).

  Examples of the polyvinyl chloride resin include: a polyvinyl chloride homopolymer; a copolymer of a vinyl chloride monomer and a monomer having an unsaturated bond copolymerizable with the vinyl chloride monomer; ) A graft copolymer obtained by graft copolymerizing vinyl chloride with a polymer may be mentioned, and these may be used alone or in combination of two or more. Further, the polyvinyl chloride resin may be chlorinated as necessary.

  Thermally expandable graphite is a conventionally known substance, and powders such as natural scaly graphite, pyrolytic graphite, and quiche graphite are mixed with inorganic acids such as concentrated sulfuric acid, nitric acid, and selenic acid, concentrated nitric acid, perchloric acid, and perchlorine. This is a crystalline compound that is treated with a strong oxidant such as acid salt, permanganate, dichromate, hydrogen peroxide, etc. to produce a graphite intercalation compound, and maintains a layered structure of carbon.

  Further, the inner pipe 40 is formed in a cylindrical shape by a synthetic resin such as vinyl chloride, polypropylene, or polyethylene, or a metal such as steel or cast iron, and both end portions thereof are receiving portions 22a and 23a of the drain pipes 22 and 23. It is inserted and fixed.

  A spiral rib may be provided on the inner surface of the inner tube 40 in order to control the drainage flow. In addition, the inner pipe 40 may be a part of a drainage joint, or may be a different diameter pipe whose inner surface is partially enlarged.

  The length of the inner pipe 40 is longer than the sheath pipe 60 by the length required for fitting so that the receiving portions 22a, 23a of the drain pipes 22, 23 can be fitted in the vicinity of both ends. .

  Further, the spacer 50 is formed of a resin system, a rubber system, a metal system, or a composite material thereof. The spacer 50 a that contacts the end surface of the sheath 60 and seals the gap 70, and the sheath 60 And an insertion portion 50b inserted into the gap 70 from the end portion.

  The flange portion 50a is formed in a flange shape (disc shape with a hole) integrated with the insertion portion 50b, and the outer diameter of the flange portion 50a is a sheath tube so that one surface thereof is brought into contact with the sheath tube 60 and is hooked. It is formed so as to be larger than the inner diameter of 60.

  Further, the insertion portion 50b is formed in a short cylindrical shape integrated with the flange portion 50a, and in order to fix the sheath tube 60, retaining rings 50c and 50c bulging in an annular shape are formed on the outer peripheral portion. Yes.

  The insertion portion 50b is formed to have the same thickness as the width of the gap 70 or a thickness larger than the gap in order to fix the inner tube 40, but the thickness changes in the insertion direction so that it can be easily inserted. It may be formed in a tapered shape. Furthermore, the structure which has a notch and a crack part in an axial direction so that it may insert easily may be sufficient.

  Further, the length of the insertion portion 50b is shorter than the sheath tube 60 and is inserted only into the end portion of the gap 70. Therefore, the sheath tube is interposed between the sheath tube 60 and the inner tube 40. A cylindrical gap 70 having a length obtained by subtracting the length of the insertion portion 50b at both ends from the length of 60 is formed.

  As a method of fixing the spacer 50 to the sheath 60 or the inner tube 40, any configuration may be used as long as it can be fixed, such as hammering, bonding, and screwing.

  Next, the effect of the piping structure C of a present Example is demonstrated.

  (1) As described above, the piping structure C of the present invention has a refractory resin composition formed of a sheath pipe 60 or a multilayer of a refractory resin composition containing a polyvinyl chloride resin and thermally expandable graphite. Formed between the sheath tube 60 and the inner tube 40, the inner tube 40 having an outer diameter smaller than the inner diameter of the sheath tube 60 and inserted inside the sheath tube 60, and the sheath tube 60. Spacer 50 inserted into the formed gap 70.

  Therefore, the sheath pipe 60 is thermally expanded at the time of a fire so as to block the penetration portion formed in the slab 10 and has fire resistance, and the inner pipe 40 is generated by the gap 70 between the inner pipe 40 and the sheath pipe 60. By absorbing the drainage noise, it is possible to reduce the solid propagation noise.

  In other words, in terms of fire resistance, the inner tube 40 is kept in a seal with the outer peripheral mortar by thermally expanding the sheath tube 60 by thermally expanding graphite while delaying combustion by being a fire resistant resin composition in the event of a fire. The gap 70 between the two can be closed.

  Further, in terms of soundproofing, since a gap 70 is formed between the inner pipe 40 and the sheath pipe 60 at all times, noise (vibration) of the inner pipe 40 is absorbed by the gap 70. It can prevent the sound of solid propagation.

  In addition, if the piping structure C of the present embodiment is used, it is not necessary to separately perform the sound insulation work for the buried portion, and since the sound insulation work is completed together with the pipe work, the construction time can be greatly shortened.

  (2) The spacer 50 includes a flange portion 50a that contacts the end surface of the sheath tube 60 and seals the gap 70, and a cylindrical insertion portion 50b that is inserted into the gap 70 from the end portion of the sheath tube 60. With this configuration, the width of the gap 70 can be maintained by the insertion portion 50b, the sheath tube 60 can be prevented from coming off from the inner tube 40, and both ends of the gap 70 can be sealed by the flange portion 50a.

  In other words, the inner tube 40 is fixed to the sheath tube 60 embedded in the outer peripheral mortar by fitting the insertion portion 50b to prevent the inner tube 40 from coming off, and both ends are sealed by the flange portion 50a to block smoke and flame. Yes.

  Further, for example, at one end portion of the sheath tube 60, a diameter-expanded portion (non-diameter portion) that has been expanded so that the inner diameter is larger than the outer diameter of the drain pipes 22 and 23 that are connected to the inner tube 40. When the inner pipe 40 is connected to the buried portion of the slab 10, both fire resistance and reduction of solid sound can be realized.

  Hereinafter, the piping structure C1 having a different form from the above embodiment will be described with reference to FIG. The description of the same or equivalent parts as described in the above embodiment will be given with the same reference numerals.

  First, the configuration will be described. Like the above example, the piping structure C1 of the present example is composed of a sheath tube 61 made of a refractory resin composition containing a thermally expandable graphite in a polyvinyl chloride resin, and a sheath. An inner tube 41 having an outer diameter smaller than the inner diameter of the tube 61 and inserted inside the sheath tube 61, and a spacer 51 inserted in a gap formed between the sheath tube 61 and the inner tube 41. I have.

  And unlike the said Example, the pipe | tube of the resin layer part of the lining steel pipe for drainage whose outer diameter is smaller than usual is used as this inner pipe | tube 41. FIG.

  In the case of the inner pipe 41 which is a pipe of the resin layer portion, the inner diameter is the same as that of the drained lining steel pipe, so that there is no problem of an inner diameter step even when combined with a conventional joint. On the other hand, since the thickness of the member of the inner tube 41 is reduced, the width of the gap between the outer surface of the inner tube 41 and the inner surface of the sheath 61 is increased.

  Further, intermediate joints 80 and 80 are fitted to both ends of the inner pipe 41 to connect the inner pipe 41 having a smaller outer diameter than usual and the drain pipes 22 and 23 having a normal diameter.

  In addition, in the present embodiment, a sound absorbing material 71 formed of glass wool is filled in a cylindrical wide gap formed between the inner tube 41 and the sheath tube 61. The sound absorbing material 71 may be rock wool, foamed resin sheet, or the like in addition to glass wool.

  Next, functions and effects will be described.

  (1) In the pipe structure C1 of the present embodiment, since the pipe of the resin layer portion of the drained lining steel pipe, which is thinner than usual, is used as the inner pipe 41, the width of the gap is widened, so that the solid sound propagation is further reduced. The effect will be improved.

  (2) Furthermore, if the sound absorbing material 71 having fire resistance is filled in the air gap, if a three-layer structure is formed, fire resistance can be further improved and drainage noise can be reduced.

  In addition, since it is as substantially the same as the said Example about another structure and an effect, description is abbreviate | omitted.

  Hereinafter, a pipe structure C2 having a form different from that of the above embodiment will be described with reference to FIG. The description of the same or equivalent parts as described in the above embodiment will be given with the same reference numerals.

  First, the configuration will be described. Like the above example, the piping structure C2 of this example is composed of a sheath tube 62 made of a refractory resin composition containing a thermally expandable graphite in a polyvinyl chloride resin, and a sheath. A drainage joint 42 as an inner pipe inserted inside the sheath pipe 62 with the outer diameter of the buried portion being made smaller than the inner diameter of the pipe 62, and a gap 70 formed between the sheath pipe 62 and the drainage joint 42. And a spacer 52 to be inserted.

  That is, unlike the above-described embodiment, the drainage joint 42 which is a joint having a branch pipe as an inner pipe is used, and a vibration isolating member is provided at a contact portion between the upper surface of the slab 10 of the building 1 and the lower surface of the branch pipe 42b of the drainage joint 42. 90 is installed.

  In addition, unlike the above embodiment, no spacer is fitted to the lower end of the main body cylinder portion 42c of the drainage joint 42, and the receiving portion 22a of the drainage pipe 22 also functions as a spacer.

  The drainage joint 42 is formed of a steel pipe, and is formed on a side of the cylindrical body cylinder part 42c that penetrates the slab 10, a connection port 42a to the drainage pipe 21 that opens at the upper end part, and a side of the cylinder body part 42c. A branch pipe 42b that opens and is connected to the drain pipe 26. In addition, as this drainage joint 42, a drained lining steel pipe, a drainage cast iron pipe, a casting joint, etc. can be used.

  In addition, the shape of the main body cylinder portion 42c may not be a straight pipe shape, but may be a tapered shape, and the length is a length that can obtain official section penetration certification and rating. If there is no particular restriction.

  Further, the vibration isolation member 90 is formed in a plate shape from a material having vibration isolation properties such as synthetic rubber, and is installed between the lower surface of the connection port of the branch pipe 42b and the drain pipe 26 and the upper surface of the slab 10. ing.

  Next, functions and effects will be described.

  (1) As explained in the present embodiment, when the drainage joint 42 as a joint having a branch pipe is used as the inner pipe, the branch pipe 42b and the slab 10 in the state embedded in the slab 10 of the building 1 By adopting a configuration in which the vibration isolation member 90 is installed at the contact location, it is possible to prevent the drainage noise from being transmitted from the drainage joint 42 to the slab 10 through the contact location.

  In addition, since it is as substantially the same as the said Example about another structure and an effect, description is abbreviate | omitted.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to the present invention. included.

  For example, in the above-described embodiment, the spacers 50, 51, and 52 are described as being formed of a normal material. However, the present invention is not limited to this, and the spacers 50, 51, and 52 themselves are heated similarly to the sheath tube. It may contain expansive graphite.

  In the above embodiment, the inner pipes 40, 41, 42 are described as being formed of ordinary materials. However, the present invention is not limited to this, and the inner pipes 40, 41, 42 themselves are the same as the sheath pipes. It may contain thermally expandable graphite.

  Furthermore, although the said Example demonstrated the case where the spacer 50 had the collar part 50a, it is not limited to this, When installing the sound-absorbing material 71 etc. which have fire resistance, predetermined fire resistance is provided. As long as it has a configuration, it may not have the flange 50a.

C, C1, C2 Piping structure 10 Slabs 21-26 Drainage pipes 40, 41, 42 Inner pipes 50, 51, 52 Spacers 60, 61, 62 Saddle pipe 50a Fence part 50b Insertion part 50c Retaining stopper 70 Air gap 71 Sound absorbing material 90 Prevention Vibration member

Claims (4)

  A sheath tube comprising a fire-resistant resin composition containing a heat-expandable graphite in a synthetic resin, or a sheath tube comprising a fire-resistant expansion layer composed of the fire-resistant resin composition in one layer of a multilayer, and an inner diameter of the sheath tube A through-section comprising an inner tube having an outer diameter reduced and inserted inside the sheath tube, and a spacer inserted in a gap formed between the sheath tube and the inner tube. Piping structure in the section.   The said spacer has a collar part which contacts the end surface of the said sheath pipe | tube, and seals the said space | gap, and a cylindrical insertion part inserted in the said space | gap from the edge part of the said sheath pipe | tube. Item 2. A piping structure in a partition penetration portion according to Item 1.   The piping structure in the partition penetrating part according to claim 1 or 2, wherein the gap is filled with a sound absorbing material.   2. When a joint having a branch pipe is used as the inner pipe, a vibration isolating member is installed at a contact portion between the branch pipe and the slab in a state of being embedded in a slab of a building. The piping structure in the partition penetration part as described in any one of Claim 3 thru | or 3.

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