JP5771514B2 - Sound insulation structure of collecting pipe joint - Google Patents

Description

  The present invention relates to a sound insulation structure for a collecting pipe joint.

  Buildings such as apartment houses and office buildings are provided with piping lines such as drainage channels and water supply channels.

  Such a pipe line includes a vertical pipe penetrating each level up and down, a horizontal pipe extending inside each level, and a collecting pipe joint connecting the vertical pipe and the horizontal pipe (for example, Patent Document 1).

  FIG. 10 shows the collective pipe joint 1. The collective pipe joint 1 includes a vertical pipe connection portion 2 that can be connected to the vertical pipe, and a horizontal pipe that protrudes from the side surface of the vertical pipe connection portion 2. It has at least one horizontal pipe connecting portion 3 that can be connected.

  Such a collective pipe joint 1 has a problem that noise generated is larger than that of a vertical pipe or a horizontal pipe, because fluid merging, direction change, deactivation (flow velocity reduction), and the like are performed inside. .

  Therefore, it has been studied to perform sound insulation by covering the outer surface of the collecting pipe joint 1 with a sound insulation material. For example, as shown in FIG. 11, a plurality of sound insulation pieces 4 made by cutting out a planar sound insulation sheet as a sound insulation material may be bonded to cover the entire outer surface of the collective pipe joint 1. It is being considered.

JP 2009-040940 A

  However, the above-described sound insulation structure of the collecting pipe joint 1 has the following problems.

  That is, since the outer surface of the collective pipe joint 1 has a complicated three-dimensional shape, when a flat sound insulation sheet is used as the sound insulation material, in order to cover the entire outer surface without a gap, ten or more sheets are required. A large number of fine sound insulation pieces 4 must be used, and it takes a lot of time and labor to cut out, wind and bond the sound insulation sheets.

  In order to solve the above-mentioned problem, the invention described in claim 1 is characterized in that a vertical pipe connecting part connectable to a vertical pipe and at least one projecting from a side surface of the vertical pipe connecting part to connect a horizontal pipe. A sound insulation structure for a collective pipe joint that covers the entire outer surface of the collective pipe joint having two horizontal pipe connection portions with a sound insulation cover, and the sound insulation cover can cover a portion above the central portion of the horizontal pipe connection portion It is characterized by having an upper sound insulation cover having a three-dimensional shape and a lower sound insulation cover having a three-dimensional shape capable of covering a portion below the central portion of the horizontal pipe connecting portion.

  According to a second aspect of the present invention, in the above, the lower sound insulation cover includes a lower sound insulation cover upper piece that can cover a lower portion of the horizontal tube connection portion and a lower portion of the vertical tube connection portion, and a vertical tube. It has a lower sound insulation cover lower piece that can cover the lower part of the lower part of the connection part.

  The invention described in claim 3 is characterized in that, in the above, a sound insulation reinforcing member is attached to at least one of the inner surface and the outer surface of the sound insulation cover.

  The invention described in claim 4 is characterized in that, in the above, the sound insulation reinforcing member is partial.

  The invention described in claim 5 is characterized in that, in the above, the sound insulation reinforcing member has a cylindrical shape and is interposed between the lower sound insulation cover and a lower portion of the vertical pipe connecting portion. Yes.

  The invention described in claim 6 is characterized in that, in the above, the sound insulation reinforcing member has a concave portion for sound absorption having a concave shape on the inner surface.

  The invention described in claim 7 is characterized in that, in the above, the concave portion for sound absorption has a vertical passage prevention shape capable of preventing passage of noise, smoke or flame in the vertical direction.

  The invention described in claim 8 is characterized in that, in the above, a sound absorbing hole with a bottom, wherein the concave part for sound absorption having the shape for preventing the passage up and down is formed to be discontinuous in the vertical direction with respect to the sound insulation reinforcing member, Alternatively, it is a lateral groove extending in the circumferential direction.

  According to invention of Claim 1, the following effects can be acquired by the said structure. In other words, the collecting pipe joint can connect the vertical pipes by the vertical pipe connecting part and can connect the horizontal pipes by at least one horizontal pipe connecting part protruding from the side surface of the vertical pipe connecting part. Thereby, it becomes possible to comprise a piping path. Such a collective pipe joint generates a larger amount of noise than a vertical pipe or a horizontal pipe because fluid merging, direction change, deactivation (flow velocity reduction), and the like are performed inside. Therefore, the entire outer surface of the collecting pipe joint is covered with a sound insulating cover so that the sound collecting of the collecting pipe joint is performed. Then, the sound insulation cover has a three-dimensional shape capable of covering a portion above the central portion of the horizontal tube connecting portion, and a three-dimensional shape capable of covering a portion lower than the central portion of the horizontal tube connecting portion. It is possible to divide the sound insulation cover into an optimally shaped upper sound insulation cover and lower sound insulation cover. Thereby, while reducing the number of parts of a sound insulation cover, the easiness of making and attachment of a sound insulation cover can be improved. In addition, since the sound insulation cover has a three-dimensional shape, it is possible to just fit the collecting pipe joint, and the sound insulation can be improved accordingly.

  According to the invention of claim 2, the lower sound insulation cover has a lower sound insulation cover upper piece capable of covering a part of the upper side of the lower part of the horizontal pipe connection part and the lower part of the vertical pipe connection part, and the lower part of the vertical pipe connection part. By having a lower sound insulation cover lower piece that can cover the remaining lower part, it becomes possible to divide the lower sound insulation cover into an optimally sized lower sound insulation cover upper piece and a lower sound insulation cover lower piece. . Thereby, the ease of making and attaching the lower sound insulation cover can be improved. Further, the lower sound insulating cover can be divided in accordance with the shape and function of the vertical pipe connecting portion.

  According to the third aspect of the present invention, the sound insulation enhancing member is attached to at least one of the inner surface and the outer surface of the sound insulation cover, so that the sound insulation effect by the sound insulation cover is enhanced by the sound insulation enhancement member, and the sound insulation is further improved. be able to. Then, by attaching the sound insulation enhancing member to the inner surface of the sound insulation cover, the sound insulation enhancing member can be hidden from the outside. On the other hand, by attaching the sound insulation reinforcing member to the outer surface of the sound insulation cover, it becomes possible to make the sound insulation reinforcement member into an optimal shape and thickness without being restricted in space, or to be installed freely. .

  According to the invention of claim 4, by making the sound insulation reinforcing member partial, it is possible to cover the portion of the collecting pipe joint that requires the most sound insulation properties in a focused and efficient manner. . Thereby, it is possible to efficiently install the sound insulation reinforcing member while suppressing the cost.

  According to the fifth aspect of the present invention, the sound insulation reinforcing member has a cylindrical shape and is interposed between the lower sound insulation cover and the lower portion of the longitudinal pipe connecting portion, so that the sound insulation reinforcing member is relatively simple. It becomes possible to install in. In addition, by installing a sound insulation reinforcing member between the lower sound insulation cover and the lower part of the vertical pipe connection part, it is possible to take more effective noise countermeasures for the parts covered by the lower sound insulation cover It becomes. Thereby, even if it is a case where it is made to perform the de-energization (flow velocity reduction) of the fluid in the said part, it becomes possible to ensure sufficient sound insulation.

  According to the invention of claim 6, the sound insulation enhancing member has a sound absorbing recess having a concave shape on the inner surface, thereby forming an air layer for sound insulation inside the sound absorbing recess, and inside the sound absorbing recess. Noise can be diffusely reflected to attenuate energy. Thereby, it becomes possible to perform sound insulation more effectively.

  According to the seventh aspect of the present invention, the sound absorbing concave portion has a vertical passage preventing shape capable of preventing the passage of noise, smoke, or flame in the vertical direction, so that noise, smoke, flame, or the like is inside the sound absorbing concave portion. It is possible to prevent it from passing through up and down. Thereby, sound insulation, smoke prevention, or flameproofness can be improved.

  According to the invention of claim 8, the sound absorbing recess having a shape that prevents vertical passage is formed so as to be discontinuous in the vertical direction with respect to the sound insulation reinforcing member, or in the circumferential direction. By extending the lateral groove, it is possible to reliably prevent the passage of noise, smoke, or flame in the vertical direction.

It is a see-through | perspective perspective view which shows the state which attached the sound insulation cover concerning the Example of this invention to the collecting pipe joint. It is a perspective view which shows the outer surface shape of the sound-insulation cover of FIG. It is the perspective view which looked at FIG. 2 from diagonally upward. FIG. 3 is a perspective view of a state where the upper sound insulation cover of FIG. 2 is turned upside down. It is a perspective view of the lower sound insulation cover (lower sound insulation cover upper piece) of FIG. It is a perspective view of the lower sound insulation cover (lower sound insulation cover lower piece) of FIG. It is the perspective view which fractured | ruptured the sound-insulation reinforcement | strengthening member of FIG. It is a partial expanded sectional view of FIG. (A)-(h) is an action | operation figure which shows the assembly procedure of a collecting pipe joint. It is a perspective view of a collecting pipe joint. It is an expanded view of the piece for sound insulation concerning a prior art example.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings.

  1 to 9 show this embodiment and its modifications.

  1 to 3 are general views, FIGS. 4 to 8 are partial views, and FIG. 9 is an operation view. Reference will be made to these as appropriate.

  <Configuration> The configuration will be described below.

  Hereinafter, the outline of the collecting pipe joint 1 will be described with reference to FIGS. 1 to 3 and FIG. 10.

  As shown in FIGS. 10 and 1, the above-described collecting pipe joint 1 is provided with a vertical pipe connecting portion 2 that can be connected to the vertical pipe 11, and a side pipe 12 that protrudes from a side surface of the vertical pipe connecting portion 2. And at least one horizontal pipe connecting portion 3 that can be connected.

  Here, the above-described collecting pipe joint 1 is mainly composed of a resin composition such as a vinyl chloride resin having flame retardancy. As shown in FIG. 1, the above-described vertical pipe 11 is a pipe line or a pipe member extending in the vertical direction. Moreover, the above-mentioned horizontal pipe 12 is a pipe line or a pipe member extending substantially in the horizontal direction. The horizontal pipe 12 is provided with a drainage gradient or the like as necessary.

  The above-described vertical pipe connecting portion 2 is provided at a cylindrical vertical pipe connecting portion main body 14 extending substantially in the vertical direction and at the upper and lower ends of the vertical pipe connecting portion main body 14 and is capable of inserting and connecting the vertical pipe 11. It has mouth parts 15 and 16.

  The vertical pipe connecting portion main body 14 is mainly constituted by three portions, ie, a main body upper portion 14a, a main body intermediate portion 14b, and a main body lower portion 14c. However, the configuration of the vertical pipe connecting portion main body 14 is not limited to this, and may be configured by two or four or more portions.

  Among these, the above-mentioned receiving part 15 is provided in the upper end part of above-described main-body upper part 14a. The receiving portion 15 is an expansion joint that can absorb the influence of thermal expansion and contraction of the vertical tube 11. Moreover, the above-mentioned horizontal pipe connection part 3 protrudes in the side direction on the side surface of the main body upper part 14a. The horizontal tube connecting portion 3 has a receiving portion to which the horizontal tube 12 can be inserted and connected. The horizontal pipe connecting portion 3 is an expansion joint that can absorb the influence of thermal expansion and contraction of the horizontal pipe 12. In this case, three horizontal pipe connecting portions 3 are provided with a phase of 90 degrees in the circumferential direction. However, the number of installed horizontal pipe connecting portions 3 and the installation angle are not limited thereto. Further, the horizontal pipe connecting portion 3 may be a horizontal pipe connecting planned portion whose end face is closed. This horizontal pipe connection scheduled portion is used by cutting the end face as necessary.

  The main body intermediate portion 14b described above has a cylindrical shape with a substantially constant diameter.

  The main body lower portion 14c has a tapered shape that decreases in diameter downward. The above-described receiving portion 16 is formed at the lower end portion of the main body lower portion 14c. The receiving portion 16 may be continuous with the tapered shape without a step, or may be continuous with a step.

  With the above configuration, the collecting pipe joint 1 has a shape that is longer on the lower side than the horizontal pipe connecting portion 3.

  Further, a depressurization mechanism for depressurizing the fluid flowing in the inside (reducing the flow velocity) is provided inside the vertical pipe connecting portion main body 14. The depressing mechanism includes swirl vanes 18a, 18b, and 18c that receive a fluid flow and impart a swirling force to the fluid. In this case, a total of three swirl vanes 18a, 18b, and 18c are provided inside the main body upper portion 14a, the main body intermediate portion 14b, and the main body lower portion 14c. The swirl vanes 18 a, 18 b, and 18 c are also used to generate a swirl flow in the fluid flowing inside to form an air core (air passage) in the axial center portion of the vertical pipe 11 or the collecting pipe joint 1. However, the installation number and installation position of the swirl blades 18a, 18b, and 18c are not limited to this.

  The collective pipe joint 1 having such a configuration constitutes a pipeline (for example, a single-pipe drainage system) such as a drainage channel or a water supply channel by being installed on a building such as an apartment house or an office building. Used for In this case, the vertical pipe connecting part main body 14 is inserted from above into the through hole 21a formed in the floor slab 21 that partitions the upper and lower floors of the building, and the main body intermediate part 14b is fixed by the mortar 21b. Is done. Therefore, the main body intermediate portion 14 b is longer than the thickness of the floor slab 21.

  And in order to use the floor slab 21 as a fire-proof division wall, the main body intermediate part 14b is comprised with resin compositions, such as a fireproof thermal expansion resin pipe. This fire-resistant and heat-expandable resin pipe is mainly composed of, for example, a fire-resistant and heat-expandable resin containing heat-expandable graphite with respect to a resin base material such as a polyvinyl chloride resin. And when this heat expansible graphite expands thermally at the time of a fire outbreak, the collecting pipe joint 1, the through-hole 21a, etc. are obstruct | occluded, and the floor slab 21 is made to hold | maintain the function as a fire prevention division wall.

  Here, although it becomes a little long, the details of the above-mentioned fire-resistant and heat-expandable resin pipe will be described.

  In this example, the fire-resistant and heat-expandable resin pipe is composed of a fire-resistant and thermally expandable resin composition containing 1 to 10 parts by weight of thermally expandable graphite with respect to 100 parts by weight of the polyvinyl chloride resin. The one having a single layer structure of the expanded layer or the fire-resistant and thermally expandable resin pipe containing 1 to 15 parts by weight of thermally expandable graphite with respect to 100 parts by weight of the polyvinyl chloride resin. It has a three-layer structure composed of a fire-resistant expansion layer made of a resin composition and a coating layer made of a polyvinyl chloride resin composition not containing thermally expandable graphite provided so as to cover the inner and outer surfaces of the fire-resistant expansion layer Is preferred.

  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 copolymerization of vinyl chloride with a polymer may be mentioned. These may be used alone or in combination of two or more. Further, the polyvinyl chloride resin may be chlorinated as necessary.

  The monomer having an unsaturated bond copolymerizable with the vinyl chloride monomer is not particularly limited, and examples thereof include α-olefins such as ethylene, propylene, and butylene; vinyl esters such as vinyl acetate and vinyl propionate; butyl Vinyl ethers such as vinyl ether and cetyl vinyl ether; (meth) acrylic acid esters such as methyl (meth) acrylate, ethyl (meth) acrylate and butyl acrylate; aromatic vinyls such as styrene and α-methylstyrene; N-phenylmaleimide N-substituted maleimides such as N-cyclohexylmaleimide and the like may be used, and these may be used alone or in combination of two or more.

  The polymer for graft copolymerization with vinyl chloride is not particularly limited as long as it is for graft copolymerization with vinyl chloride. For example, ethylene-vinyl acetate copolymer, ethylene-vinyl acetate-carbon monoxide copolymer Polymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate-carbon monoxide copolymer, ethylene-methyl methacrylate copolymer, ethylene-propylene copolymer, acrylonitrile-butadiene copolymer, polyurethane, chlorinated polyethylene, A chlorinated polypropylene etc. are mentioned, These may be used independently and 2 or more types may be used together.

  Any of the above polyvinyl chloride resins may be cross-linked or modified as long as the fire resistance of the resin composition is not impaired. In this case, a resin that has been cross-linked or modified in advance may be used. When an additive or the like is blended, it may be cross-linked or modified at the same time, or may be cross-linked or modified after the above components are blended in the resin. good. There is no particular limitation on the crosslinking method of the resin, and a conventional crosslinking method of polyvinyl chloride resin, for example, crosslinking using various crosslinking agents, peroxides, crosslinking by electron beam irradiation, water crosslinkable material is used. And the like.

  The fire-resistant and heat-expandable resin pipe of the present invention has only a fire-resistant expansion layer as long as the fire-resistant expansion layer expands when heated by a flame or the like and can close or close the inside of the pipe. Even in the case of a single layer, a multi-layer structure in which a resin layer made of a resin composition not containing expanded graphite is provided on the inner and outer surfaces of the fire resistant expansion layer within a range not impairing the fire resistance performance of the fire resistant expansion layer.

  In the case of the single-layer structure product, the fire-resistant and heat-expandable resin composition for forming the fire-resistant and expandable layer is not particularly limited, but 1 to 10 weights of thermally expandable graphite with respect to 100 parts by weight of the polyvinyl chloride resin. What is contained in the ratio of a part is preferable, What is contained in the ratio of 1-8 weight part is more preferable, What is contained in the ratio of 2-7 weight part is still more preferable. This is because if the thermal expansive graphite is less than 1 part by weight, sufficient thermal expansibility may not be obtained at the time of combustion, and desired fire resistance may not be obtained. This is because the thermal expansion is excessive, the shape cannot be maintained, and the residue falls off, which may reduce the fire resistance.

  On the other hand, in the case of a multilayer structure product, the fire-resistant and heat-expandable resin composition for forming the fire-resistant and expandable layer is not particularly limited, but the heat-expandable graphite is 1 to 15 with respect to 100 parts by weight of the polyvinyl chloride resin. What is contained in the ratio of a weight part is preferable, What is contained in the ratio of 1-12 weight part is more preferable, What is contained in the ratio of 2-10 weight part is still more preferable. This is because if the thermal expansive graphite is less than 1 part by weight of the thermal expansive graphite, sufficient thermal expansibility cannot be obtained at the time of combustion, the desired fire resistance cannot be obtained, and if it exceeds 15 parts by weight, This is because the film expands too much due to heating, the shape cannot be maintained, and the residue falls off, which may reduce the fire resistance.

  Further, as described above, the fire-resistant expansion layer is formed of a fire-resistant and heat-expandable resin composition containing 1 to 15 parts by weight of thermally expandable graphite with respect to 100 parts by weight of the polyvinyl chloride resin. In the case of a product, it is preferable to have a three-layer structure in which the inner and outer surfaces of the fireproof expansion layer are coated with a polyvinyl chloride resin composition that does not contain a heat-expandable fireproof material.

  In the case of a multilayer structure product having a three-layer structure as described above, the thickness of the coating layer covering the inner surface and the outer surface of the refractory tube is preferably 0.2 to 2.0 mm. This is because if the thickness of the coating layer covering the inner surface and outer surface of the fireproof expansion layer is less than 0.2 mm, the mechanical strength of the tube may be inferior, and if it exceeds 2.0 mm, the fire resistance may decrease. Because there is.

  The thermally expandable graphite used in the present invention is a powder of natural scale-like graphite, pyrolytic graphite, quiche graphite or the like, and an inorganic acid such as concentrated sulfuric acid, nitric acid or selenic acid, concentrated nitric acid, perchloric acid, perchlorate, perchlorate. With a strong oxidizer such as manganate, dichromate, hydrogen peroxide, etc., after the acid treatment to insert an inorganic acid between the graphite layers, the layer structure of carbon obtained by adjusting the pH is maintained. It is preferable to use a thermally expandable graphite which is a crystalline compound and adjusted to pH 1.5 to 4.0 and a heat expandable graphite having a 1.3 times expansion temperature of 180 ° C. to 240 ° C. That is, if the pH of the thermally expandable graphite is less than 1.5, the acidity is too strong, and it easily causes corrosion of the molding apparatus. If the pH exceeds 4.0, the effect of promoting the carbonization of the polyvinyl chloride resin It is because there is a possibility that sufficient fire resistance performance may not be obtained.

  In addition, the fire-resistant and heat-expandable resin composition for forming the fire-resistant expansion layer has a stabilizer, an inorganic filler, a flame retardant, a lubricant, a processing aid, an impact modifier, and the like within a range not impairing the object of the present invention. Additives such as a quality agent, a heat resistance improver, an antioxidant, a light stabilizer, an ultraviolet absorber, a pigment, a plasticizer, and a thermoplastic elastomer may be added.

  Further details of the collecting pipe joint 1 will be omitted.

  Then, the entire outer surface of the collecting pipe joint 1 as described above is covered with the sound insulating cover 25. In this embodiment, the sound insulation cover 25 is as follows.

(Configuration 1)
As shown in any of the overall views of FIGS. 1 to 3, the above-described sound insulation cover 25 has a three-dimensional shape capable of covering a portion of the collecting pipe joint 1 above the central portion of the horizontal pipe connecting portion 3. It is assumed that the upper sound insulating cover 26 and the lower sound insulating cover 27 having a three-dimensional shape capable of covering a portion below the central portion of the horizontal pipe connecting portion 3 are provided.

  Here, the sound insulation cover 25 has substantially the same shape as the outer shape of the collecting pipe joint 1 and is slightly larger than the collecting pipe joint 1. Such a three-dimensional sound insulation cover 25 is formed by injection molding or the like. The sound insulation cover 25 is made of a resin material highly filled with an inorganic filler such as calcium carbonate. The resin material highly filled with an inorganic filler such as calcium carbonate exhibits a sound insulation effect due to its large weight per unit volume.

  Such a sound insulation cover 25 is preferably made of a resin composition containing 300 to 600 parts by weight of an inorganic filler with respect to 100 parts by weight of the olefin resin.

  More specifically, the inorganic filler used in the sound insulation cover 25 is not particularly limited as long as the object of this embodiment can be achieved. For example, silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide. , Magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, dawn night, hydrotal Sight, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica-based balun, aluminum nitride, aluminum nitride Elemental, silicon nitride, carbon black, graphite, carbon fiber, carbon balun, charcoal powder, various metal powders, potassium titanate, magnesium sulfate, lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless fiber, boric acid Examples include zinc, various magnetic powders, slag fibers, fly ash, and dewatered sludge. Of these, calcium carbonate is most preferably used in consideration of the balance between weight and cost. These may be used alone or in combination of two or more.

  The olefin-based resin used for the sound insulation cover 25 is not particularly limited as long as the object of this embodiment can be achieved. For example, low-density polyethylene, high-density polyethylene, linear low-density polyethylene, atactic Examples include polypropylene, isotactic polypropylene, syndiotactic polypropylene, and polyalphaolefin. Among them, polyethylene having a density of 0.87 to 0.93 g / cm3 is preferable.

If the density of the polyethylene used for the sound insulation cover 25 is less than 0.87 g / cm 3, the sound insulation cover 25 is not strong enough. On the other hand, if the density exceeds 0.93 g / cm 3, the sound insulation cover 25 will buckle due to slight deformation. There is a risk that.
In this case, for example, the sound insulation cover 25 is composed of a resin material containing 84% PP material (80% calcium carbonate, 20% PP material), 15% PE material, and 1% pigment. Has been. However, the composition and blending ratio of the sound insulating cover 25 are not necessarily limited to this.

  Moreover, the center part of the horizontal pipe connection part 3 is a center part of the up-down direction of the horizontal pipe connection part 3, and has pointed out the horizontal diameter position of the horizontal pipe connection part 3, or its periphery. The upper sound-insulating cover 26 and the lower sound-insulating cover 27 are divided into upper and lower parts and can be continued without a gap when combined.

  The upper sound insulation cover 26 has a three-dimensional shape substantially corresponding to the upper half of the main body upper portion 14a. The upper sound insulation cover 26 includes a vertical pipe connecting part upper covering part 26a that can cover the upper part of the vertical pipe connecting part 2, and a horizontal pipe connecting part upper covering that can cover the upper part (upper half) of the horizontal pipe connecting part 3. And a portion 26b.

  On the other hand, the lower sound insulating cover 27 has a three-dimensional shape substantially corresponding to the lower half of the main body upper portion 14a, the main body middle portion 14b, and the lower body portion 14c. The details of the lower sound insulation cover 27 will be described later.

  If necessary, a fitting shape portion 28 that can be fitted to each other is provided between the lower edge portion of the upper sound insulation cover 26 and the upper edge portion of the lower sound insulation cover 27.

  In this case, as shown in the partial views of FIGS. 4 and 5, the fitting shape portion 28 includes an inner step portion 28 a formed on the inner surface of the lower edge portion of the upper sound insulation cover 26 so as to reduce the wall thickness, The outer stepped portion 28b is formed on the outer surface of the upper edge portion of the lower sound insulating cover 27 so as to reduce the thickness. The inner stepped portion 28a and the outer stepped portion 28b are preferably overlapped so as to be flush with the peripheral portion by fitting. However, the inner stepped portion 28a and the outer stepped portion 28b may be reversed. Moreover, it can also be set as a butt | matching part etc. instead of the fitting shape part 28. FIG. Furthermore, if not flush, only the outer stepped portion 28b may be provided.

  In addition, about the part corresponding to the opening part of the horizontal pipe connection part 3 in the sound-insulation cover 25, you may make it open in a closed state after making it open previously, or you may make it open later.

(Configuration 2)
Mainly, as shown in FIG. 2, the lower sound insulation cover 27 described above can cover a lower part (lower half part) of the horizontal pipe connecting part 3 and a part of the upper side of the lower part of the vertical pipe connecting part 2. The sound insulation cover upper piece 31 and the lower sound insulation cover lower piece 32 capable of covering the remaining portion on the lower side of the lower portion of the vertical pipe connecting portion 2 are provided.

  Here, the lower sound-insulating cover upper piece 31 and the lower sound-insulating cover lower piece 32 are divided into upper and lower parts and can be continued without a gap when combined.

  The lower sound insulating cover upper piece 31 has a three-dimensional shape substantially corresponding to the lower half portion of the main body upper portion 14a and the main body intermediate portion 14b. The lower sound insulation cover upper piece 31 includes a horizontal pipe connecting portion lower covering portion 31b and a vertical pipe connecting portion lower covering portion upper piece 31a.

  On the other hand, the lower sound insulation cover lower piece 32 has a three-dimensional shape substantially corresponding to the main body lower portion 14c. The lower sound insulation cover upper piece 31 is mainly constituted by a vertical pipe connecting portion lower covering portion lower piece.

  If necessary, a fitting shape portion 33 that can be fitted to each other is provided between the lower edge portion of the lower sound insulation cover upper piece 31 and the upper edge portion of the lower sound insulation cover lower piece 32.

  In this case, as shown in the partial views of FIGS. 5 and 6, the fitting shape portion 33 has an outer step portion 33 a formed on the outer surface of the lower edge portion of the lower sound insulation cover upper piece 31 so as to reduce the thickness. (Not clearly shown) and an inner step portion 33b formed on the inner surface of the upper edge portion of the lower sound insulation cover lower piece 32 so as to reduce the thickness. The outer stepped portion 33a and the inner stepped portion 33b are preferably overlapped so as to be flush with the peripheral portion by fitting. However, the outer stepped portion 33a and the inner stepped portion 33b may be reversed. Further, a butt portion or the like can be used instead of the fitting shape portion 33. Furthermore, if not flush, only the inner stepped portion 33b may be provided.

(Configuration 3)
As shown in the overall views of FIGS. 1 and 3 and the partial views of FIGS. 7 and 8, a sound insulation reinforcing member 35 is attached to at least one of the inner surface and the outer surface of the sound insulation cover 25 described above.

  Here, the sound insulation enhancing member 35 is used by overlapping the sound insulation cover 25 to improve the sound insulation. The sound insulation enhancing member 35 can be provided in a double or triple or multiple overlap (multiple sound insulation enhancing member).

In this case, the sound insulation enhancing member 35 is provided in a single layer (double in combination with the sound insulation cover 25) with respect to the sound insulation cover 25. The sound insulation enhancing member 35 is made of a resin material that is the same as or similar to the sound insulation cover 25 and highly filled with an inorganic filler such as calcium carbonate.
The sound insulation reinforcing member 35 is three-dimensional like the sound insulation cover 25. The three-dimensional sound insulation enhancing member 35 is formed by injection molding or the like.

(Configuration 4)
The above-described sound insulation enhancing member 35 is made partial (partial sound insulation enhancing member).

  Here, the sound insulation reinforcing member 35 may be an overall member that covers the entire surface of the collective pipe joint 1 (overall sound insulation strengthening member), but emphasizes the portion of the collective pipe joint 1 that requires the most sound insulation. Can be partly covered efficiently and efficiently.

(Configuration 5)
The above-described sound insulation reinforcing member 35 is cylindrical (cylindrical sound insulation reinforcing member). And it is made to interpose between the above-mentioned lower sound insulation cover 27 and the lower part of the vertical pipe connection part 2. FIG.

  Here, the sound insulation reinforcing member 35 can cover the entire lower part (main body middle part 14b and main body lower part 14c) of the vertical pipe connecting part 2, but in this case, the sound insulation reinforcing member 35 is At least the main body intermediate portion 14b described above or its periphery is covered.

  The sound insulation reinforcing member 35 is a cylindrical body having an inner surface shape substantially along the outer surface shape of the lower portion of the vertical pipe connecting portion 2. The sound insulation enhancing member 35 may have a slight uneven shape on the inner peripheral surface or the outer peripheral surface. In this case, the sound insulation reinforcing member 35 has a step shape by matching the outer shape of the main body intermediate portion 14b with the intermediate portion being relatively thick and the upper and lower inner surfaces being relatively thin. It is supposed to be. Note that the sound insulation reinforcing member 35 may be divided into a plurality of pieces in the circumferential direction so as to be easily attached. Furthermore, when the sound insulation reinforcing member 35 is divided into a plurality of parts in the circumferential direction, an uneven part for positioning or connection may be provided on the mating surface of the divided pieces. In this case, a half-divided piece is used.

  The sound insulation reinforcing member 35 is provided between the inner surface of the sound insulation cover 25 and the outer surface of the collecting pipe joint 1.

  It should be noted that a complicated shape portion is formed on the inner side of the boundary portion between the horizontal pipe connecting portion lower covering portion 31b and the vertical pipe connecting portion lower covering portion upper piece 31a, the outer peripheral portion of the horizontal pipe connecting portion 3 and the receiving portion 15 or the like. In order to seal the gap with respect to the step portion, a sound insulation spacer member 36 having a flexible sound insulation property such as foam tape is attached as necessary. In this foam tape, an adhesive layer is formed on one surface of a long string-like foam material having a rectangular cross section, and release paper or the like is adhered to the adhesive layer. In this case, the sound insulation reinforcing member 35 is installed such that the upper end of the sound insulation reinforcing member 35 abuts against the lower edge of the sound insulation spacer member 36 or the like.

(Configuration 6)
The above-described sound insulation reinforcing member 35 has a sound absorbing concave portion 37 having a concave shape on the inner surface.

  Here, the sound-absorbing recess 37 forms a sound-insulating air layer that can be sealed inside, and attenuates energy by irregularly reflecting noise therein. One or more sound absorbing recesses 37 can be provided on the inner surface of the sound insulation reinforcing member 35. Preferably, a large number of the sound absorbing recesses 37 are provided over the entire inner surface of the sound insulation reinforcing member 35. However, with respect to the upper and lower edges of the sound insulation reinforcing member 35, it is preferable to secure a recess-unformed portion without the sound-absorbing recess 37 and to provide the above-described sound-absorbing recess 37 inside. In this case, although not specifically shown in the drawing, a recess-unformed portion of about 5 mm is formed on the upper and lower edges of the sound insulation reinforcing member 35.

(Configuration 7)
The above-described sound-absorbing recess 37 has a vertical passage prevention shape (vertical cut-off shape) that can prevent (or block) passage of noise, smoke, or flame in the vertical direction.

  This vertical passage prevention shape can also be rephrased as a vertical discontinuous shape (vertical discontinuous concave portion) in which the above-described sound absorbing concave portion 37 is not continuous in the vertical direction. This vertically discontinuous shape is a shape that does not directly communicate between the upper edge portion and the lower edge portion of the sound insulation reinforcing member 35. The vertical direction refers to the tube axis direction of the vertical tube connecting portion 2.

(Configuration 8)
The sound absorbing concave portion 37 having a vertically passing shape is a bottomed sound absorbing hole or a lateral groove extending in the circumferential direction so as to be discontinuous in the vertical direction with respect to the sound insulation reinforcing member 35.

Here, the bottomed sound absorbing holes are independent round holes, square holes, holes of other shapes, and the like. The bottomed sound absorbing holes can be arranged regularly or irregularly.
Further, the lateral groove extending in the circumferential direction (of the vertical pipe connecting portion 2) is a circumferential groove or an annular groove. The circumferential groove or the annular groove can be continuous over the entire circumference or can be discontinuous in the circumferential direction. A plurality of circumferential grooves or annular grooves are juxtaposed in the vertical direction. The plurality of lateral grooves preferably have independent internal spaces. Further, the lateral groove can be a spiral groove. However, when the spiral groove is used, at least one (inner) partition wall portion is provided inside the spiral groove. Furthermore, the bottomed sound absorbing hole and the lateral groove can be appropriately combined.

  And although the rib formed in the boundary part between an upper and lower horizontal groove and the said partition wall part formed in a horizontal groove are not specifically limited, It is preferable that the height shall be 2.0-6.0 mm. The ribs and the front ends of the partition walls are brought into contact with the outer peripheral surface of the vertical pipe connecting portion 2 to seal the sound absorbing recess 37.

That is, if the height of the rib or partition wall is less than 2.0 mm, the air layer does not function sufficiently as a sound absorbing space. If it exceeds 0 mm, the air layer is not sufficiently blocked at the time of fire resistance, the fire resistance may be lowered, and the diameter of the through hole 21a of the floor slab 21 is also increased.
The ribs and partition walls described above are not particularly limited, but the width is 1. It is preferable to set it as 0-3.0 mm.

  In other words, if the width of the rib or partition wall is less than 1.0 mm, the strength is insufficient, and there is a risk of buckling when installed, whereas if it exceeds 3.0 mm, the workability may be reduced. Because there is.

  Although the rib and the partition wall portion are not particularly shown, the tip portion and the root portion may be rounded.

  In addition, it is not preferable because it is less effective than the bottomed sound absorption holes and lateral grooves, but it is intentionally installed with the purpose of preventing the passage of noise, smoke or flame in the vertical direction. If there is, there are one or more discontinuous portions that function substantially in the middle, or vertically pass through a longitudinal groove or inclined groove having a length that does not reach between the upper and lower ends of the sound insulation reinforcing member 35. It can be included in the prevention shape. Further, such vertical grooves and inclined grooves can be combined with the above-described bottomed sound absorbing holes and horizontal grooves.

  Furthermore, each of the sound insulation cover 25 and the sound insulation reinforcing member 35 is formed to have a uniform thickness in principle. However, since the collecting pipe joint 1 has a complicated shape, the thickness is locally increased accordingly. Can be changed. Further, a portion where noise is likely to be generated can be locally thickened.

  The space formed between the collecting pipe joint 1 and the sound insulation cover 25 is a cross-sectional area of the space formed between the collecting pipe joint 1 and the sound insulation cover 25 in the pipe cross section (hereinafter referred to as “ The space cross-sectional area ”is preferably 30 to 70% of the total cross-sectional area (hereinafter referred to as“ outer tube total cross-sectional area ”) of the sound insulating cover 25, the rib and the partition wall.

  That is, if the space cross-sectional area is less than 30% of the total outer tube cross-sectional area, the air layer in the space portion does not function sufficiently as a sound absorbing space. This is because even if one fire-resistant and heat-expandable resin pipe expands, the space portion is not sufficiently blocked, and the fire resistance may be lowered.

  <Operation> The operation of this embodiment will be described below.

  The collecting pipe joint 1 connects the vertical pipe 11 to the vertical pipe connecting part 2 and connects the horizontal pipe 12 to at least one horizontal pipe connecting part 3 protruding from the side surface of the vertical pipe connecting part 2. Used to build pipelines such as roads.

  In this collective pipe joint 1, a vertical pipe connecting part main body 14 is inserted from above into a through hole 21 a formed in a floor slab 21 that partitions the upper and lower floors of a building, and the main body intermediate part 14 b is fixed with a mortar 21 b. It is installed by.

  Such a collective pipe joint 1 has a larger noise generated than the vertical pipe 11 and the horizontal pipe 12 because the fluid is joined, changed in direction, depressurized (reduced flow velocity), and the like. Therefore, the entire outer surface of the collecting pipe joint 1 is covered with a sound insulating cover 25 so that the sound collecting of the collecting pipe joint 1 is performed.

  For this purpose, the sound insulation cover 25 is attached to the collecting pipe joint 1. For example, as shown in FIG. 9 (a), the sound insulation enhancing member 35 is attached to the outer periphery of the main body intermediate portion 14b by attaching a sound insulation enhancing member 35 in a halved state, as shown in FIG. 9 (b). After fixing 35 with the adhesive tape T1, as shown in FIG. 9 (c), foam tape or the like on the upper part of the sound insulation reinforcing member 35, the outer periphery of the base part of the horizontal pipe connecting part 3, or the base part of the upper end receiving part 15 A sound insulation spacer member 36 having a flexible and sound insulation property is attached to eliminate the influence of the step, and as shown in FIG. 9D, a lower sound insulation cover upper piece 31 is attached from above the sound insulation enhancement member 35. Next, as shown in FIG. 9 (e), the lower sound insulation cover lower piece 32 is attached to the main body lower portion 14c, and as shown in FIG. 9 (f), the lower sound insulation cover upper piece 31 and the lower sound insulation cover. Stick between the lower piece 32 and around the lower end of the lower sound insulation cover lower piece 32. 9A. Finally, as shown in FIG. 9G, the upper sound insulation cover 26 is attached to the upper portion 14a of the main body, and as shown in FIG. 9H, the upper sound insulation cover 26 and the lower sound insulation cover. It is performed by fixing at least the outer periphery of the distal end of the horizontal tube connecting portion 3 between the upper piece 31 and the outer periphery of the receiving portion 15 at the upper end of the upper sound insulation cover 26 with an adhesive tape T3. Thereby, the sound insulation cover 25 is easily attached to the collecting pipe joint 1 in a short time. The procedure for attaching the sound insulation cover 25 is not limited to this. Of course, the above-mentioned adhesive tapes T1 to T3 and the foamed tape (sound insulation spacer member 36) have different purposes and configurations.

  And in the event of a fire, the middle pipe portion made of a fire-resistant and heat-expandable resin pipe is resistant to burning of the collecting pipe joint 1 made of vinyl chloride resin having flame resistance. When the thermally expandable graphite contained in 14b is thermally expanded, the collecting pipe joint 1, the through hole 21a, and the like are closed, and the floor slab 21 can retain the function as a fireproof partition wall.

  At this time, the sound insulation cover 25 attached to the outer periphery of the collecting pipe joint 1 can block the smoke and flame generated from the lower side of the floor slab 21 so as not to pass above the floor slab 21.

  <Effect> According to this embodiment, the following effects can be obtained.

(Operation effect 1)
With the above-described configuration 1, the following operational effects can be obtained. That is, the sound insulation cover 25 covers the upper sound insulation cover 26 having a three-dimensional shape capable of covering a portion above the central portion of the horizontal tube connecting portion 3 and the portion below the central portion of the horizontal tube connecting portion 3. By having the lower sound insulation cover 27 having a possible three-dimensional shape, the sound insulation cover 25 is divided into an upper sound insulation cover 26 and a lower sound insulation cover 27 having optimum shapes for the collecting pipe joint 1 having a complicated shape. It becomes possible. Thereby, while reducing the number of parts of the sound insulation cover 25, the easiness of making and attachment of the sound insulation cover 25 can be improved. Further, since the sound insulating cover 25 has a three-dimensional shape, it is possible to make the sound insulating cover 25 just fit to the collecting pipe joint 1, and the sound insulating property can be improved accordingly.

(Operation effect 2)
With the above-described configuration 2, the following operational effects can be obtained. That is, the lower sound insulation cover 27 can cover the lower part of the horizontal pipe connection part 3 and the upper part of the lower part of the vertical pipe connection part 2, and the lower part of the lower part of the vertical pipe connection part 2. The lower sound insulation cover lower piece 32 that can cover the remaining portion of the lower sound insulation cover 27 can be divided into the lower sound insulation cover upper piece 31 and the lower sound insulation cover lower piece 32 of the optimum size. It becomes. Thereby, the easiness of making and attachment of the lower sound-insulation cover 27 can be improved. Further, the lower sound insulating cover 27 can be divided in accordance with the shape and function of the vertical pipe connecting portion 2.

(Operation effect 3)
With the above-described configuration 3, the following operational effects can be obtained. That is, since the sound insulation enhancing member 35 is attached to at least one of the inner surface and the outer surface of the sound insulation cover 25, the sound insulation effect by the sound insulation cover 25 can be enhanced by the sound insulation enhancement member 35, and the sound insulation can be further enhanced. . Then, by attaching the sound insulation enhancing member 35 to the inner surface of the sound insulation cover 25, the sound insulation enhancing member 35 can be made invisible from the outside. On the other hand, by attaching the sound insulation reinforcing member 35 to the outer surface of the sound insulation cover 25, the sound insulation reinforcement member 35 is made to have an optimum shape and thickness without being restricted by space, and the sound insulation property is made higher. It can be installed freely.

(Operation effect 4)
With the configuration 4 described above, the following operational effects can be obtained. That is, by making the sound insulation reinforcing member 35 partial, it is possible to cover the portion of the collecting pipe joint 1 that requires the most sound insulation properties in a focused and efficient manner. Thereby, it becomes possible to install the sound insulation reinforcement member 35 efficiently, suppressing cost.

(Operation effect 5)
With the above-described configuration 5, the following operational effects can be obtained. That is, the sound insulation reinforcing member 35 has a cylindrical shape and is interposed between the lower sound insulation cover 27 and the lower portion of the vertical pipe connection portion 2, so that the sound insulation reinforcement member 35 can be installed relatively easily. It becomes possible. Further, since the sound insulation reinforcing member 35 is interposed between the lower sound insulation cover 27 and the lower portion of the vertical pipe connecting portion 2, more effective noise countermeasures can be taken for the portion covered by the lower sound insulation cover 27. Can be applied. Thereby, even if it is a case where it is made to perform the de-energization (flow velocity reduction) of the fluid in the said part, it becomes possible to ensure sufficient sound insulation.

(Operation effect 6)
With the configuration 6 described above, the following operational effects can be obtained. That is, the sound insulation enhancing member 35 has a sound absorbing recess 37 having a concave shape on the inner surface, thereby forming a sound insulating air layer inside the sound absorbing recess 37 and irregularly reflecting noise inside the sound absorbing recess 37. Energy can be attenuated. Thereby, it becomes possible to perform sound insulation more effectively.

(Operation effect 7)
With the configuration 7 described above, the following operational effects can be obtained. That is, the sound absorbing concave portion 37 has a shape that prevents the passage of noise, smoke, or flame in the vertical direction, so that noise, smoke, or flame passes through the inside of the sound absorbing concave portion 37 in the vertical direction. It is possible to prevent slipping out. Thereby, sound insulation, smoke prevention, or flameproofness can be improved.

(Operation effect 8)
With the above-described configuration 8, the following operational effects can be obtained. That is, the sound-absorbing concave portion 37 having a vertical passage-preventing shape is a bottomed sound-absorbing hole or a lateral groove extending in the circumferential direction formed so as to be discontinuous in the vertical direction with respect to the sound insulation enhancing member 35. Thus, it is possible to reliably prevent the passage of noise, smoke or flame in the vertical direction.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention, and the present invention is not limited to the configurations of the embodiments. Needless to say, design changes and the like within a range not departing from the gist of the invention are included in the present invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if not specifically described. Further, when a plurality of embodiments and modifications are shown, it is needless to say that possible combinations of configurations extending over these are included even if not specifically described. Further, the configuration depicted in the drawings is of course included even if not particularly described. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

DESCRIPTION OF SYMBOLS 1 Collecting pipe joint 2 Vertical pipe connection part 3 Horizontal pipe connection part 11 Vertical pipe 12 Horizontal pipe 25 Sound insulation cover 26 Upper sound insulation cover 27 Lower sound insulation cover 31 Lower sound insulation cover upper piece 32 Lower sound insulation cover lower piece 35 Sound insulation reinforcement member 37 Sound absorption Recess

Claims (8)

A sound insulation cover covers the entire outer surface of the collective pipe joint having a vertical pipe connection portion connectable to the vertical pipe and at least one horizontal pipe connection portion projecting from a side surface of the vertical pipe connection portion and connectable to the horizontal pipe. The sound insulation structure of the covering pipe joint that covers,
The sound insulation cover has an upper sound insulation cover having a three-dimensional shape capable of covering a portion above the center portion of the horizontal pipe connection portion;
A sound insulation structure for a collective pipe joint, comprising: a lower sound insulation cover having a three-dimensional shape capable of covering a portion below a central portion of a horizontal pipe connection portion. The lower sound insulation cover is
A lower sound insulation cover upper piece capable of covering a part of the upper side of the lower part of the horizontal pipe connection part and the lower part of the vertical pipe connection part;
The sound insulation structure for a collective pipe joint according to claim 1, further comprising a lower sound insulation cover lower piece capable of covering the remaining part of the lower part of the lower portion of the vertical pipe connection portion.   The sound insulation structure for a collecting pipe joint according to claim 1 or 2, wherein a sound insulation reinforcing member is attached to at least one of an inner surface and an outer surface of the sound insulation cover.   The sound insulation structure for a collecting pipe joint according to claim 3, wherein the sound insulation reinforcing member is a partial member.   The sound insulation structure for a collective pipe joint according to claim 4, wherein the sound insulation reinforcing member has a cylindrical shape and is interposed between the lower sound insulation cover and a lower portion of the vertical pipe connecting portion. .   The sound insulation structure for a collecting pipe joint according to any one of claims 3 to 5, wherein the sound insulation reinforcing member has a sound absorbing concave portion having a concave shape on an inner surface.   The sound insulation structure for a collecting pipe joint according to claim 6, wherein the sound-absorbing recess has a vertical passage prevention shape capable of preventing passage of noise, smoke, or flame in the vertical direction.   The concave part for sound absorption having the above-mentioned shape for preventing vertical passage is a bottomed sound absorbing hole formed to be discontinuous in the vertical direction with respect to the sound insulation reinforcing member, or a lateral groove extending in the circumferential direction. The sound insulation structure for a collecting pipe joint according to claim 7.