JP5608419B2 - Drainage pipe fitting - Google Patents

Description

  The present invention relates to a drainage pipe joint used in a junction of side branch pipes of a vertical pipe in a drainage pipe including a vertical pipe, a horizontal pipe, and a curved pipe connecting the vertical pipe and the horizontal pipe. .

  In the case of multi-layered buildings such as apartment buildings, the wastewater discharged from sanitary equipment etc. on each floor is collected from the sanitary equipment etc. on each floor via drainage pipes into a drainage conduit provided in the pipe shaft, It is drained to the sewer through curved and horizontal pipes.

Moreover, the drainage pipe joint by which the swirl | wing blade (it is also called a baffle plate) was provided inside is used for the horizontal branch pipe confluence | merging part of a standing pipe line of a single pipe | tube type drainage system (patent documents 1-3). reference).
That is, the drainage pipe joint receives the drainage flowing down from the upper floor with a swirl vane and turns it into a swirl flow along the inner wall surface of the vertical pipe, always providing a ventilation core in the vertical pipe, and closing the vertical pipe Without the pressure fluctuation due to pressure, it is possible to prevent the sealing of the sealing water of sanitary equipment etc. on each floor due to pressure fluctuation.

JP-A-8-93021 Japanese Patent No. 2912827 Japanese Patent Laid-Open No. 11-217859

However, the conventional drainage pipe joint with swirl blades as described above has the following problems.
For example, in the drainage pipe joint described in Patent Document 1, it is not always sufficient to ensure an effective cross-sectional area for drainage to flow down, and in order to prevent inflow into the branch pipe, Since it is necessary to increase the shape, there is a problem that the shape of the drift guide is complicated and the manufacturing is likely to be difficult.

  In the drainage pipe joint described in Patent Document 2, it is necessary to provide a swirl flow straightening plate at a position that accurately corresponds to the wastewater flow drifted by the flow drift plate in consideration of drainage conditions. It is difficult to set the position, the position is limited, and the entire shape such as the size of the joint is greatly restricted, which makes it difficult to manufacture.

  In the drainage pipe joint described in Patent Document 3, the swirl vane is installed below the side branch pipe connection port, with two pieces shifted from the pipe axis from the cylindrical part having a larger diameter than the drainage standpipe to the tapered cylinder part. However, the swirl vanes face each other at the same height, and both are installed below the connecting part of the horizontal branch pipe, so that the flow is affected by the swirl flow interference from each other swirl vanes. In addition to the problem of affecting the drainage performance due to disturbance, there is a problem that a sufficiently large swirl blade cannot be installed to prevent clogging of filth due to the installation of multiple swirl blades in the tapered tube section. is there.

  In view of the above circumstances, the present invention eliminates the problems of conventional drainage pipe joints, can increase the swirling force of drainage flowing down in the vertical pipe line, can reliably secure the ventilation core, and swivel It aims at providing the drainage pipe joint which can also reduce the pressure fluctuation in a standing pipe line by the de-energizing effect by a blade | wing.

In order to achieve the above object, a drainage pipe joint according to the present invention includes a main body barrel having an inner diameter larger than that of a vertical pipe connected vertically, and at least provided so as to protrude from a wall surface of the main body barrel. In a drainage pipe joint including one horizontal branch pipe connecting portion and a tapered cylindrical portion that is provided below the main body barrel and gradually decreases in diameter toward the lower end side, a first provided in the main body barrel. A swirl vane, a second swirl vane provided below the lower end of the first swirl vane, and a third swirl vane below the lower end of the second swirl vane and provided in the tapered tube portion. In the first to third swirl vanes, the drainage received by the first swirl vane is received by the second swirl vane and becomes a swirl flow that cannot be received by the third swirl vane . Received by the swirl vane 14g and the second swirl vane 12c Mera no drainage, be received directly to the third swirl vanes 52 are arranged so that the swirling flow, and the first to third swirl vanes, the 15 to 50 ° to the tube axis of the standpipe It is characterized by inclining at an inclination angle .

  Although the drainage pipe joint of the present invention is not particularly limited, the perpendicular line L2 from the midpoint C1 of the line segment L1 connecting the outer edge upper end and the outer edge lower end of the first swirl vane to the central axis of the main body body, and the second swirl vane From the midpoint C3 of the line segment L3 connecting the upper end of the outer edge and the lower end of the outer edge to the perpendicular line L4 from the midpoint C2 to the central axis of the body barrel, and the midpoint C3 of the line segment L5 connecting the upper end of the third swirl vane When the perpendicular line L6 to the central axis of the main body trunk is projected in the direction of the central axis from the first swirl blade side toward the third swirl blade side, the perpendicular L2 projected. It is preferable that the angle formed by the perpendicular line L4 satisfies 70 to 90 °, and the angle formed by the projected perpendicular line L4 and perpendicular line L6 satisfies 150 to 200 °.

That is, if the angle formed by the projected perpendicular L2 and perpendicular L4 is less than 70 °, the overlap between the first swirl vane and the second swirl vane becomes large, and the effect of each swirl vane is not sufficiently exhibited, and 90 ° If it exceeds, there is a possibility that the drainage from the first swirl vane cannot be sufficiently received by the second swirl vane.
Also, if the angle formed between the perpendicular line L4 and the perpendicular line L6 is less than 150 °, the swirl flow from the second swirl vane and the swirl flow of the third swirl vane interfere with each other, the flow is disturbed, and the ventilation core is blocked. If the angle exceeds 200 °, the overlap between the first swirl vane and the third swirl vane increases, and the effects of the respective swirl vanes may not be sufficiently exhibited.
The outer edge of the swirl vane means an edge along the inner wall surface of the joint body that supports the swirl vane or the wall surface of the support leg. Depending on the shape of the swirl vane, the outer edge upper end is the highest point of the swirl vane, and the outer edge lower end May not be the lowest point of the swirl vane.

In the present invention, the swirl vane is formed by bonding or integrally molding to a cylindrical part such as a main body body part, or by forming a wall surface of a cylindrical member constituting the joint body, or having a circular arc cross section. It is provided by incorporating in the joint body a member obtained by bonding or integrally forming the swirl blades along the arc inner wall surface of the blade support leg.
Therefore, the outer edge of the swirling blade refers to an edge in contact with the inner wall surface of the cylindrical portion, an edge in contact with the inner peripheral surface of the cylindrical member, or an edge in contact with the arc inner wall surface of the blade support leg portion. The lower end may not necessarily be the upper end or the lower end of the swirl vane itself.

The drainage pipe joint of the present invention is not particularly limited, but it is preferable that the height difference between the lower end of the first swirl vane and the upper end of the second swirl vane is 0 or more and twice or less the inner diameter of the main body barrel.
That is, if the height difference deviates from the above range, the drainage does not transfer well from the first swirl vane to the second swirl vane, which may disturb the swirl flow.

Although the drainage pipe joint of the present invention is not particularly limited, the lateral branch pipe connecting portion includes a longitudinal rib on the inner wall surface of the main body, which prevents the entrance of drainage from upstream into the main body trunk side opening of the lateral branch pipe junction. It is preferable.
Further, the vertical rib may be provided on the downstream side of the first swirl vane so that the waste water hitting the vertical rib is received by the second swirl vane.

  The height of the vertical rib (maximum protrusion amount in the tube center direction) is not particularly limited as long as it can prevent the entrance of drainage from upstream to the body trunk side opening of the side branch pipe confluence, but it is too high. Then, since it becomes obstructive for the passage of solids and test balls flowing down the vertical pipe, if the inner diameter of the main body is about 140 mm, the maximum height from the inner wall of the main body is 5 to 30 mm. The degree is preferred.

Although the drainage pipe joint of the present invention is not particularly limited, it is preferable that the first to third swirl blades are inclined at an inclination angle of 15 to 50 ° (preferably 20 to 45 °) with respect to the pipe axis. That is, if the angle of inclination of each swirl blade is too steep, the drainage that flows down cannot be received sufficiently, and if it is too loose, the rebound of the drainage that flows down increases and the flow may be disturbed.
The inclination angles of the first to third swirl blades with respect to the tube axis may be the same, but the inclination angle of the second swirl blade may be smaller than the inclination angle of the first swirl blade and the tilt angle of the third swirl blade. preferable.

The size of the first to third swirl vanes is not particularly limited, but the projected area ratio to the horizontal inner cross-section of the vertical pipe is 5 to 30% for the first swirl vane and the second swirl vane, and the third swirl vane Since it is provided on the tapered surface, the size is preferably 3 to 25%.
That is, if the projected area ratio is too small, the effect of the swirl blade cannot be sufficiently obtained, and if the projected area ratio is too large, it may hinder the passage of solids and test balls flowing down the vertical pipe. There is.

The material of the drainage pipe joint of the present invention is not particularly limited, but considering the weight reduction and ease of manufacture, a plurality of tubular or ring-shaped joint constituent members made of a synthetic resin composition are connected and integrated. It is preferable that the joint component forming at least the floor slab penetrating portion is formed of a fire-resistant and heat-expandable resin pipe including at least a fire-resistant and expandable layer made of a fire-resistant and thermally expandable resin composition. .
That is, since it is all made of synthetic resin, it is lightweight.

  In addition, the floor slab penetration part is required to have fire resistance so that smoke and flame from the downstairs will not enter the upper floor from the floor slab penetration part for more than 2 hours even if a fire breaks down. If the joint component constituting the part is formed of a fire-resistant and heat-expandable resin pipe having at least a fire-resistant and expandable resin layer made of a fire-resistant and thermally expandable resin composition, the downstairs exposed part of the drainage pipe joint is exposed to the downstairs flame. Even if it disappears, the fire-resistant expansion layer of the fire-resistant and heat-expandable resin pipe expands and the floor slab penetrating portion is blocked, and the downstairs flame and smoke do not pass through the drainage pipe joint and enter the upper floor.

In the present invention, 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. A layer having a single layer structure, or a 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 a polyvinyl chloride resin What has a three-layer structure comprising a fireproof expansion layer made of a composition and a coating layer made of a polyvinyl chloride resin composition containing no thermally expandable graphite provided so as to cover the inner and outer surfaces of the fireproof expansion layer preferable.
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 used, and 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.

  The average degree of polymerization of the polyvinyl chloride-based resin is not particularly limited. However, when it becomes smaller, the physical properties of the molded body are lowered, and when it becomes larger, the melt viscosity becomes higher and molding becomes difficult. Preferably, 600-1400 is particularly preferable. The average degree of polymerization refers to a resin obtained by dissolving a polyvinyl chloride resin in tetrahydrofuran (THF), removing insoluble components by filtration, and then removing THF in the filtrate by drying. It means the average degree of polymerization measured according to -6721 “Testing method of vinyl chloride resin”.

  The polymerization method of the polyvinyl chloride resin is not particularly limited, and any conventionally known polymerization method may be employed, and examples thereof include a bulk polymerization method, a solution polymerization method, an emulsion polymerization method, and a suspension polymerization method. It is done.

  The method for chlorinating the polyvinyl chloride resin is not particularly limited, and a conventionally known chlorination method may be employed, and examples thereof include a thermal chlorination method and a photochlorination method.

  Any of the above polyvinyl chloride resins may be cross-linked or modified within a range not impairing the fire resistance performance of the resin composition. 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 it may be cross-linked or modified after the above components are blended in the resin. . 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 further more preferable. That is, 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 the desired fire resistance may not be obtained. If it expands too much, its 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 further more preferable. That is, if the thermally expandable graphite is less than 1 part by weight of the thermally expandable graphite, sufficient thermal expansion cannot be obtained at the time of combustion, and desired fire resistance cannot be obtained. Due to the thermal expansion, 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.
That is, if the thickness of the coating layer covering the inner and outer surfaces of the fireproof expansion layer is less than 0.2 mm, the mechanical strength as a tube may be inferior, and if it exceeds 2.0 mm, the fire resistance may be reduced. .

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 heat-expandable graphite is less than 1.5, the acidity is too strong to easily cause corrosion of the molding apparatus. If the pH exceeds 4.0, the effect of promoting the carbonization of the polyvinyl chloride resin There is a risk that the fire resistance may be reduced and sufficient fire resistance may not be obtained.

  The pH adjustment method of the thermally expandable graphite is not particularly limited, but normally, in the state of acid treatment that inserts an inorganic acid between the layers of the raw graphite as described above, the pH is 1 or less. There is a method in which the graphite after acid treatment is washed with water to remove the acid remaining on the surface of the graphite and then dried. That is, in order to increase the pH of the thermally expandable graphite, water washing and drying may be repeated.

On the other hand, if the expansion temperature of the heat-expandable graphite is less than 180 ° C, the heat-expandable graphite may expand during molding, which causes poor appearance of the tube and fire resistance during combustion. When the 1.3 times expansion temperature of the thermally expandable graphite exceeds 240 ° C., there is no possibility that the expansion of the thermally expandable graphite will start during molding. After the thermal decomposition (foaming) of the polyvinyl chloride resin progresses and the flexibility of the polyvinyl chloride resin decreases, the thermally expandable graphite expands. There is a risk that it will not be able to withstand the expansion of the graphite and will collapse apart.
The 1.3 times expansion temperature is a temperature at which the expansion ratio of the thermally expandable graphite after heating the sample of the thermally expandable graphite for 30 minutes with the inside of the heating furnace becomes a constant temperature is 1.3 or more. means. Further, the expansion ratio can be obtained by dividing the volume of the sample after heating by the volume of the sample before heating.

  Although the particle diameter of the said thermally expansible graphite is not specifically limited, Preferably it is 100-400 micrometers, More preferably, it is 120-350 micrometers. That is, if the particle size becomes too fine, the expansion rate of the refractory resin composition may be reduced. On the other hand, if the particle size becomes too large, the structure expands too much due to heating, the shape cannot be maintained, the residue falls off, the fire resistance decreases, and the fire resistant resin composition is used as a piping material. The physical properties, such as tensile strength and flat strength, are reduced, and the mechanical strength required for the tube material 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.
The stabilizer is not particularly limited, and examples thereof include lead stabilizers, organotin stabilizers, higher fatty acid metal salts, and the like, and these can be used alone or in combination.

Examples of lead stabilizers include lead white, basic lead sulfite, tribasic lead sulfate, dibasic lead phosphite, dibasic lead phthalate, tribasic lead maleate, silica gel coprecipitated silicic acid. Lead, dibasic lead stearate, lead stearate, lead naphthenate are mentioned.
Examples of the organotin stabilizer include mercaptides such as dibutyltin mercapto, dioctyltin mercapto, and dimethyltin mercapto; And carboxylates such as dibutyltin mercaptodibutyltin laurate and dibutyltin laurate polymer.

  Examples of higher fatty acid metal salts (metal soaps) include lithium stearate, magnesium stearate, calcium stearate, calcium laurate, calcium ricinoleate, strontium stearate, barium stearate, barium laurate, barium ricinoleate, and stearic acid. Cadmium, cadmium laurate, cadmium ricinoleate, cadmium naphthenate, cadmium 2-ethylhexoate, zinc stearate, zinc laurate, zinc ricinoleate, zinc 2-ethylhexoate, lead stearate, lead dibasic stearate, naphthene Lead acid is mentioned.

The blending ratio of the stabilizer is not particularly limited, but is preferably 0.3 to 5.0 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin.
That is, if the blending ratio of the stabilizer is less than 0.3 parts by weight, it is difficult to ensure the thermal stability of the polyvinyl chloride resin at the time of molding, and there is a possibility that carbide is likely to be produced during molding. If the amount exceeds 0.0 parts by weight, the promotion of carbonization of the polyvinyl chloride resin during combustion may be hindered and sufficient fire resistance may not be obtained.

The inorganic filler is not particularly limited. 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, Dawnite, Hydrotalcite, 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, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balun, charcoal powder, various metals Candidates include potassium titanate, magnesium sulfate, lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, dehydrated sludge, etc. Of these, basic inorganic fillers such as calcium carbonate, calcium silicate, calcium hydroxide, calcium oxide, magnesium carbonate, magnesium hydroxide, magnesium oxide, barium carbonate, aluminum hydroxide, zinc oxide, zinc hydroxide and iron oxide Is preferably used.
These may be used alone or in admixture of two or more.

  The blending ratio of the inorganic filler is not particularly limited, but is preferably 0.3 to 50 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin, and 2 to 5 parts by weight. It is preferable. That is, when the inorganic filler is less than 0.3 parts by weight, the aggregate function is not performed during combustion, and the shape cannot be maintained, and the residue may fall off, resulting in a decrease in fire resistance. If the amount exceeds 50 parts by weight, the ratio of the polyvinyl chloride resin to the whole composition becomes low, so that the tensile strength may be lowered.

  In particular, when using the heat-expandable graphite whose pH is adjusted to 1.5 to 4.0, the basic inorganic filler is added to 0.3 to 100 parts by weight of the polyvinyl chloride resin. It is preferable to mix | blend in the ratio of 5.0 weight part. That is, when the blending ratio of the basic inorganic filler is less than 0.3 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin, the thermal stability of the polyvinyl chloride resin at the time of molding cannot be secured, and molding is performed. If the basic compound exceeds 5.0 parts by weight, the promotion of carbonization of the polyvinyl chloride resin during combustion may be hindered, and the fire resistance may not be significantly improved. There is.

  The flame retardant is not particularly limited as long as it is for enhancing flame retardancy during combustion. For example, hydroxides such as aluminum hydroxide and magnesium hydroxide, hydrotalcite, antimony dioxide, and antimony trioxide. Antimony oxides such as antimony pentoxide, molybdenum compounds such as molybdenum trioxide, molybdenum disulfide, ammonium molybdate, bromine compounds such as tetrabromobisphenol A, tetrabromoethane, tetrabromoethane, tetrabromoethane, triphenylphosphine Phosphorus compounds such as phosphate and ammonium polyphosphate, calcium borate, zinc borate and the like can be mentioned, but antimony trioxide is particularly preferable as a combustion suppressing effect of polyvinyl chloride. This is because the antimony compound has a very strong synergistic effect in producing a halogenated antimony compound under high temperature conditions and suppressing the combustion cycle in the presence of a halogen compound.

  By using a flame retardant in combination, the heat insulation effect due to the expansion of the thermally expandable graphite and the combustion delay effect due to the flame retardant exhibit a synergistic effect during combustion, and the fire resistance can be improved more efficiently. The number of added flame retardants is not particularly limited, but it is preferably 1 to 20 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin. If the flame retardant is less than 1 part by weight, it is difficult to obtain a sufficient synergistic effect, and if the flame retardant is added in excess of 20 parts by weight, the moldability and physical properties may be significantly reduced. is there.

  The heat stabilization aid is not particularly limited, and examples thereof include epoxidized soybean oil, phosphate ester, polyol, hydrotalcite, and zeolite. These may be used alone or in combination of two or more.

Examples of the lubricant include an internal lubricant and an external lubricant.
The internal lubricant is used for the purpose of lowering the flow viscosity of the molten resin during molding and preventing frictional heat generation. The internal lubricant is not particularly limited, and examples thereof include butyl stearate, lauryl alcohol, stearyl alcohol, epoxy soybean oil, glycerin monostearate, stearic acid, and bisamide. These may be used alone or in combination of two or more.
The external lubricant is used for the purpose of increasing the sliding effect between the molten resin and the metal surface during molding. The external lubricant is not particularly limited, and examples thereof include paraffin wax, polyolefin wax, ester wax, and montanic acid wax. These may be used alone or in combination of two or more.

  The processing aid is not particularly limited, and examples thereof include acrylic processing aids such as alkyl acrylate-alkyl methacrylate copolymers having a weight average molecular weight of 100,000 to 2,000,000. The acrylic processing aid is not particularly limited, and examples thereof include n-butyl acrylate-methyl methacrylate copolymer and 2-ethylhexyl acrylate-methyl methacrylate-butyl methacrylate copolymer. These may be used alone or in combination of two or more.

  The impact modifier is not particularly limited, and examples thereof include methyl methacrylate-butadiene-styrene copolymer (MBS), chlorinated polyethylene, and acrylic rubber.

  The heat resistance improver is not particularly limited, and examples thereof include α-methylstyrene-based and N-phenylmaleimide-based resins.

  It does not specifically limit as said antioxidant, For example, a phenolic antioxidant etc. are mentioned.

  The light stabilizer is not particularly limited, and examples thereof include hindered amine light stabilizers.

  The ultraviolet absorber is not particularly limited, and examples thereof include salicylic acid ester-based, benzophenone-based, benzotriazole-based, and cyanoacrylate-based ultraviolet absorbers.

  The pigment is not particularly limited, and examples thereof include organic pigments such as azo, phthalocyanine, selenium, and dye lakes; oxides, molybdenum chromates, sulfides / selenides, ferrocyanides, and the like. Examples include inorganic pigments.

  In addition, a plasticizer may be added to the polyvinyl chloride resin composition, but since it may reduce the heat resistance and fire resistance of the molded product, it is not preferable to use a large amount. The plasticizer is not particularly limited, and examples thereof include dibutyl phthalate, di-2-ethylhexyl phthalate, and di-2-ethylhexyl adipate.

  The thermoplastic elastomer is not particularly limited. For example, acrylonitrile-butadiene copolymer (NBR), ethylene-vinyl acetate copolymer (EVA), ethylene-vinyl acetate-carbon monoxide copolymer (EVACO), Vinyl chloride-based thermoplastic elastomers such as vinyl chloride-vinyl acetate copolymer and vinyl chloride-vinylidene chloride copolymer, styrene-based thermoplastic elastomer, olefin-based thermoplastic elastomer, urethane-based thermoplastic elastomer, polyester-based thermoplastic elastomer, Examples thereof include polyamide-based thermoplastic elastomers. These thermoplastic elastomers may be used alone or in combination of two or more.

The material of the joint constituent member other than the above-mentioned fire-resistant and heat-expandable resin pipe is not particularly limited, but a synthetic resin composition containing a combustion retarding substance is preferable, and non-expanding as a combustion retarding substance with respect to 100 parts by weight of polyvinyl chloride resin. It is more preferable to use a resin composition containing 0.1 to 1 part by weight of graphite.
That is, if the non-expandable graphite is less than 0.1 part by weight, it is likely to be deformed by heat and the sealing surface with the mortar cannot be maintained and smoke may be generated. If it exceeds the part, there is a risk that the flat strength which is the JIS physical property of the joint cannot be secured.

The particle size of the non-expandable graphite is not particularly limited, but the average particle size is preferably 300 μm or less. That is, when the thickness is 300 μm or more, the flat strength may be insufficient.

The non-thermally expandable graphite is not particularly limited, but is preferably heat-dried before mixing with the polyvinyl chloride resin.
That is, volatile matter is attached to commercially available graphite, and this volatile matter may volatilize due to temperature rise during molding, which may cause a problem that the appearance of the molded product deteriorates, and the appearance of the molded product is improved. In order to keep it, it is preferable to remove volatile matter in advance by a heat drying treatment.

  Further, in the resin composition constituting the joint component other than the above-mentioned fire-resistant and heat-expandable resin pipe, the same stabilizer as the fire-resistant and heat-expandable resin pipe, if necessary, within a range not hindering the object of the present invention, Additives such as inorganic fillers, flame retardants, lubricants, processing aids, impact modifiers, heat improvers, antioxidants, light stabilizers, UV absorbers, pigments, plasticizers, thermoplastic elastomers, etc. are added May be.

  Furthermore, when the drain pipe joint of the present invention uses an injection-molded joint component connected to the upper end of the fire-resistant and heat-expandable resin pipe, the gate position at the time of injection is the fire-resistant and heat-expandable resin pipe. It is preferable to use what is the connection part.

  As described above, the drainage pipe joint according to the present invention includes the first swirl blade provided inside the main body body, the second swirl blade provided below the lower end of the first swirl blade, and the second swirl. The first swirl vane has a third swirl blade below the lower end of the swirl vane and in the tapered tube portion. The first to third swirl vanes are drained by the first swirl vane. The swirl flow is not received by the third swirl vane.

That is, in the drainage pipe joint according to the present invention, the drainage that is received by the third swirl vane and becomes a swirl flow does not collide with the swirl flow of the drainage received by the first swirl vane and the second swirl vane. Therefore, the swirl flow generated by the first swirl vane and the second swirl vane and the swirl flow generated by the third swirl vane flow down while maintaining a smooth swirl flow without interfering with each other. Can be ensured reliably, and the pressure fluctuation in the vertical pipe line can be reduced by the de-energizing effect of the swirl vanes. That is, a high drainage capacity can be stably maintained.
Furthermore, since the waste water that has been swirled by the first swirl blade and the second swirl blade and the waste water that has been swirled by the third swirl blade do not merge, the generation of drainage noise can be reduced. It becomes possible.
In addition, since the second swirl vane is provided below the lower end of the first swirl vane, and the third swirl vane is provided below the second swirl vane, each swirl vane is greatly extended in the horizontal direction. However, each swirl vane does not overlap other swirl vanes. Therefore, if each swirl vane is enlarged within a range that does not hinder the passage of the test ball, the drainage capacity can be further increased.

It is a longitudinal section showing a 1st embodiment of a drainage pipe joint concerning the present invention. It is the figure which looked at the cross section of the main body trunk | drum of the drain pipe joint of FIG. 1 from upper direction. It is sectional drawing of the part of the taper cylinder part which looked at the drain pipe joint of FIG. 1 from the reverse direction. It is sectional drawing explaining the construction state of the drain pipe joint of FIG. It is a front view of the decomposition | disassembly state of the drain pipe joint of FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
1 to 3 show a first embodiment of a drainage pipe joint according to the present invention, and FIG. 4 shows a construction state thereof.

As shown in FIG. 1, the drainage pipe joint A includes a main body trunk portion 11a, three side branch pipe connection portions 21, and a tapered tube portion 13b, and a first swirl vane 14g and a second swirl vane 12c. And a total of three swirl vanes 52, the third swirl vane 52.
The main body trunk portion 11a has a larger inner diameter than the vertical pipe connected to the upper and lower sides (for example, when the vertical pipe is 100A, the inner diameter is 135 to 145 mm).

The three lateral branch pipe connection portions 21 are substantially orthogonal to the tube axis of the main body trunk portion 11a, and are shifted by 90 ° in the circumferential direction of the main body trunk portion 11a with the one lateral branch pipe connection portion 21 at the center. It is connected to the main body trunk portion 11a.
Three vertical ribs 51a, 51b, 51c are integrally provided on the inner wall surface of the main body body 11a.

The vertical ribs 51 a, 51 b, 51 c respectively enter the horizontal branch pipe connection part 21 from the opening end of each horizontal branch pipe connection part 21 on the side of the main body part 11 a of the horizontal branch pipe connection part 21. For the purpose of preventing the horizontal branch pipe connection portion 21 from being blocked, the horizontal branch pipe connection portion 21 is provided on the upstream side of the swirling flow of the drainage near the open end of each horizontal branch pipe connection portion.
The height of the vertical ribs 51a, 51b, 51c (the dimension in the direction of the central axis of the main body body 11a from the inner wall surface of the main body body 11a) does not hinder the passage of the test ball and achieves the above object. If it can, it will not specifically limit, However, The vertical rib 51a provided in the immediate vicinity of the 1st swirl | wing blade 14g in the downstream of the 1st swirl | wing blade 14g mentioned later is a little higher than others.

As shown in FIG. 1, the first swirl vane 14g is disposed on the upstream side of the swirl flow with respect to the vertical rib 51a in the main body 11a, and is included in the arc of the swirl vane support leg 14h having a horizontal cross-section arc shape. It is provided along the peripheral surface.
The first swirl vane 14g has an inclination angle of 15 to 50 degrees with respect to the tube axis, and a projection area ratio with respect to the inner cross-sectional area of the connected standpipe is 5 to 30%. Yes.

The second swirl vane 12c does not overlap the first swirl vane 14g in the horizontal direction, and the height difference between the upper end of the second swirl vane 14g and the lower end of the first swirl vane 14g is equal to or less than the inner diameter of the main body trunk 11a and the inclination thereof. The angle is slightly smaller than the first swirl vane 14g and the third swirl vane 52 described later with respect to the tube axis, and the size thereof is formed such that the projected area ratio with respect to the inner cross-sectional area of the vertical tube is 5 to 30%. ing.
The second swirl vane 12c includes a perpendicular line L2 from the midpoint C1 of the line segment L1 connecting the upper edge of the first swirl vane 14 and the lower edge of the outer edge to the central axis C of the main body trunk 11a, and the second swirl vane 12c. The perpendicular L2 projected when the normal line L4 from the midpoint C2 of the line segment L3 connecting the upper edge of the outer edge and the lower edge of the outer edge to the central axis C of the main body body 11a is projected in the direction of the central axis of the main body 11a. And the vertical line L4 are arranged so as to satisfy the vertical rib 51a from below.

Further, the height difference between the upper end of the second swirl vane 12c and the lower end of the first swirl vane 14g is greater than 0 and equal to or less than twice the inner diameter of the main body body 11a.
The third swirl vane 52 is provided in the tapered cylinder portion 13b, and the size thereof is formed such that the projected area ratio with respect to the inner cross-sectional area of the vertical pipe is 5 to 30%.
Further, the third swirl vane 52 has a perpendicular line L6 from the midpoint C3 of the line segment L5 connecting the outer edge upper end and the outer edge lower end of the third swirl blade 52 to the central axis of the main body body, and the perpendicular line L4. The angle β formed between the perpendicular L6 and the perpendicular L4 projected when projected in the direction of the central axis of the main body trunk portion 11a satisfies 150 to 200 °, and the wastewater that is swirled by the second swirl vane 12c The three swirl blades 52 are provided at positions that do not flow.

And this drain pipe coupling A assembles the 11 joint structural members of the 1st joint structural member 10-the 11th joint structural member 20 shown in FIG. 5, and three packings, the 1st packing 31-the 3rd packing 33. Is formed by.
More specifically, the first joint component 10 has a ratio of 1 to 15 parts by weight of thermally expandable graphite with respect to 100 parts by weight of the polyvinyl chloride resin disclosed in, for example, Japanese Patent Application Laid-Open No. 2008-180367. A fire-resistant expansion layer formed of a fire-resistant and heat-expandable resin composition, and a coating layer formed of a polyvinyl chloride resin composition not containing a heat-expandable fire-resistant material covering the inner and outer surfaces of the fire-resistant expansion layer. This is a pipe (for example, Sekisui Chemical Co., Ltd. Eslon refractory VP pipe) obtained by extrusion molding having a three-layer structure, and has a larger diameter than a drainage standpipe P1 described later.

The second joint constituent member 11 to the eleventh joint constituent member 20 are each made of polyvinyl chloride containing 0.1 to 1.0 parts by weight of non-expandable graphite with respect to 100 parts by weight of the polyvinyl chloride resin. It is obtained by injection molding a resin composition.
As shown in FIGS. 1 to 3, the second joint component member 11 includes a main body body portion 11 a as a longitudinal pipe forming portion and three lateral portions constituting a part of the lateral branch pipe connecting portion 21. A branch pipe connecting portion forming cylinder portion 11b.

The main body trunk portion 11a has a cylindrical shape having an inner diameter substantially the same as the outer diameter of the first joint component member 10, and an upper fitting portion 11c on which the lower end portion of the third joint component member 12 is fitted, The lower fitting part 11d which the ring-shaped fitting part 12a of the 4th joint structural member 13 mentioned later and the upper end part of the 1st joint structural member 10 fit is provided in the side.
In addition, the above-described three vertical ribs 51a, 51b, 51c are provided on the inner surface of the main body trunk portion 11a so as to reach the upper end of the lower fitting portion 12d from the lower end of the upper fitting portion 11c.

Each horizontal branch pipe connecting portion forming cylinder portion 11b is provided so as to protrude in a cylindrical shape from the outer wall surface of the main body trunk portion 11a at the same height position of the main body trunk portion 11a.
Further, the second joint component member 11 is provided with a gate position at the time of injection molding at the lower end thereof, that is, at the connection portion with the first joint component member 10.

The third joint component 12 includes a ring-shaped fitting part 12a and a swirl blade forming part 12b.
The ring-shaped fitting portion 12 a has an outer diameter that is substantially the same as the inner diameter of the main body trunk portion 11 a of the second joint component 11, and has a ring shape that is substantially the same as the height of the vertical rib 51.

The swirl blade forming portion 12b includes a second swirl blade 12c and a blade support leg 12d.
The blade support leg portion 12d extends from the lower end of the ring-shaped fitting portion 12a, and the vertical dimension is substantially the same as the vertical dimension (tube axis direction) of the first joint component member 10. The horizontal cross section has an arc shape.
As shown in FIG. 3, the third joint component member 12 is provided at a position where the second swirl vane 12 c faces the vertical rib 51 a from below.

The fourth joint component 13 includes an upper receiving port 13a, a tapered tube portion 13b, and a lower receiving port 13c.
The upper receiving port 13 a is configured such that the lower end of the first joint component member 10 is fitted therein, and the inner diameter thereof is substantially the same as the outer diameter of the first joint component member 10.

The tapered cylindrical portion 13b is gradually reduced in diameter from the upper end toward the lower end, and the upper end is substantially the same inner diameter as the inner diameter of the first joint component member 10, and the inner diameter of the drainage pipe P1 to which the lower end is connected is It is almost the same.
As shown in FIGS. 1 and 5, the tapered cylindrical portion 13 b is provided with third swirl vanes 52 so as to protrude inward by denting a part of the wall surface inward.

The fifth joint component member 14 includes a main body portion 14a and a swirl blade forming portion 14b.
The main body part 14a includes an upper cylinder part 14c and a lower cylinder part 14d.
The upper cylindrical portion 14c has an outer diameter larger than the inner diameter of the main body trunk portion 11a of the second joint component member 11, and a sixth joint component member 15 (described later) is fitted on the outer peripheral surface of the upper end portion thereof in a retaining state. A mating protrusion 14e to be mated is provided in a ring shape.

The lower cylindrical portion 14d has a stepped diameter from the lower end of the upper cylindrical portion 14c, and the outer diameter thereof is substantially the same as the inner diameter of the main body barrel portion 11a of the second joint component member 11.
The lower cylindrical portion 14d has a ring-like rib 14f that projects inwardly at the lower end thereof and receives the load of the drainage standpipe P1 via a standpipe receiving portion 31b of the first packing 31 described later. .

The inner diameter of the rib 14f is substantially the same as the inner diameter of the drainage pipe P1.
The swirl blade forming portion 14b includes a first swirl blade 14g and a blade support leg portion 14h.
The swirl vane support leg 14h has a width substantially the same as the horizontal width of the first swirl vane 14g and extends downward from the lower end of the lower cylindrical portion 14d, and supports the first swirl vane 14g slightly above the lower edge.

The first packing 31 is a packing made of a rubber material such as ethylene-propylene-diene rubber (EPDM) that is normally used in drainage equipment. The first packing 31 has a nominal diameter of 100A, for example, as shown in FIG. There is a lip portion 31a that tightly adheres to the outer peripheral surface of the drainage standpipe P1, and the upper end surface of the main body portion 14a of the fifth joint component member 14 is substantially aligned with the upper end surface of the fifth joint component member 14. It is mated.
Further, the lip portion 31a is provided so as to gradually become smaller in diameter toward the lower end side, the upper end side is substantially the same as or slightly larger in diameter than the drainage standpipe P1, and the lower end side of the drainage standpipe P1. It has a vertical tube receiving portion 31b that is smaller than the outer diameter and stepped. And this vertical pipe receiving part 31b receives the pipe end part of the drainage vertical pipe P1, and absorbs the thermal expansion-contraction of the drainage vertical pipe P1.

The sixth joint constituent member 15 is fitted on the upper end portion of the fifth joint constituent member 14, and the flange portion 15a provided at one end prevents the first packing 31 from being detached from the fifth joint constituent member 14. It has become.
Then, after the fifth joint component member 14, the first packing 31 and the sixth joint component member 15 are assembled and integrated in advance, the lower tubular portion 14 d of the fifth joint component member 14 is connected to the second joint component member 11. It is fitted and bonded to the upper fitting part 11c provided in the main body trunk part 11a.

The seventh joint component 16 has a fitting portion 16a at one end and a packing mounting portion 16b at the other end.
The fitting portion 16 a is fitted and bonded to the side branch pipe connecting portion forming cylinder portion 11 b of the second joint component member 11.
The packing mounting portion 16b has a slightly larger outer diameter than the fitting portion 16a, and a second packing 32 described later is fitted thereto.

  The second packing 32 is a packing made of a rubber material such as ethylene-propylene-diene rubber (EPDM) that is normally used in drainage equipment, and is fitted to the packing mounting portion 16b. For example, as shown in FIG. The lip portion 32a is provided in close contact with the outer peripheral surface of the horizontal branch pipe P2 having a nominal diameter of 80A.

  The eighth joint component 17 is externally fitted to the packing mounting portion 16b of the seventh joint component 16, and the flange portion 17a provided at one end prevents the second packing 32 from being detached from the seventh joint component 16. It is supposed to be.

The ninth joint component 18 has a fitting portion 18a at one end and a packing mounting portion 18b at the other end.
The fitting portion 18 a is fitted and bonded to the horizontal branch pipe connecting portion forming cylinder portion 11 b of the second joint component member 11.
The packing mounting portion 18b has a slightly larger outer diameter than the fitting portion 18a, and a second packing 32 described later is fitted thereto.
Further, a hole 18c into which a later-described side branch pipe P3 penetrating the fitting part 18a and the packing mounting part 18b is inserted is a ninth joint to the side branch pipe connecting part forming cylinder part 11b of the ninth joint constituent member 1. The component member 18 is decentered downward from the central axis.

  The third packing 33 is a packing made of a rubber material such as ethylene-propylene-diene rubber (EPDM), which is usually used in drainage equipment, and is fitted to the taper packing mounting portion 18b. For example, as shown in FIG. It has a lip portion 33a that is in close water-tight contact with the outer peripheral surface of the side branch pipe P3 having a diameter of 50A.

  The tenth joint component member 19 is externally fitted to the packing mounting portion 18b of the ninth joint component member 18, and the flange portion 19a provided at one end prevents the third packing 33 from being detached from the ninth joint component member 18. It is supposed to be.

  As shown in FIG. 2, the eleventh joint component member 20 includes a lid 20a and a fitting portion 20b, and the fitting portion 20b does not connect the side branch pipe P2 of the second joint component member 11. The side branch tube connecting portion forming cylinder portion 11b is sealed by fitting and bonding to the portion forming cylinder portion 11b.

And as shown in FIG. 4, this drainage pipe coupling A is used for the side branch pipe confluence | merging part of each floor of the drainage standing line of a multi-story building, and is constructed as follows.
That is, the first joint constituent member 10 and the first joint constituent member 10 and the portion including the fitting connection portion of the second joint constituent member 11 are installed in a state facing the through hole S1 of the floor slab S, and the lower side The floor drainage pipe P1 (for example, an ESLON fireproof VP pipe manufactured by Sekisui Chemical Co., Ltd., which is a commercial product) can be fitted into the lower receiving port 13c of the fourth joint component 13 and bonded.
Further, the lower end portion of the drainage pipe P <b> 1 on the upper floor is fitted to the fifth joint constituent member 15 through the sixth joint constituent member 5.

Next, the floor slab through-hole S1 is filled with mortar M, and a portion including the first joint constituent member 10 and the fitting joint portion of the first joint constituent member 10 and the second joint constituent member 11 is embedded in the mortar M. .
Then, the end portion of the side branch pipe P2 is inserted into the seventh joint constituent member 17 via the ninth joint constituent member 19 and the eighth joint constituent member 18 to connect the side branch pipe P2.

  The drainage pipe joint A is configured as described above. Of the drainage flowing down from the upper floor to the drainage pipe joint A, the drainage received by the first swirl vane 14g is first fed by the first swirl vane 14g. It is decelerated and a turning force is applied. And the waste water which passed through the 1st swirl | wing blade 14g is not received by the 1st swirl | wing blade 14g, but is received by the 2nd swirl | wing blade 12c with the waste_water | drain received directly by the 2nd swirl | wing blade 12c, and a turning force is further provided. While flowing down. And the waste water which passed through the 2nd swirl | wing blade 12c is received by the 3rd swirl | wing blade 52, and flows into the drainage vertical pipe P1 of a lower floor, maintaining a swirl flow.

On the other hand, the wastewater that is not received by the first swirl vane 14g and the second swirl vane 12c but directly received by the third swirl vane 52 is decelerated by the third swirl vane 52, is given a swirl force, and maintains swirl flow. However, it flows into the drainage pipe P1 on the lower floor.
In other words, the drainage pipe joint A is located below the drainage swirled by the first swirl vane 14g and the second swirl vane 12c and the wastewater swirled by the third swirl vane without joining. Flow down. Therefore, a sufficient ventilation core can be secured and drainage performance is improved.

  Furthermore, since the waste water that has been swirled by the first swirl blade 14g and the second swirl blade 12c and the waste water that has been swirled by the third swirl blade 52 do not merge, the generation of drainage noise is also reduced. It becomes possible to do.

Moreover, the 2nd joint structural member 11 is equipped with the vertical rib 51a, 51b, 51c which obstructs the entrance of waste_water | drain from upstream to the main body trunk | drum 11a side opening of the side branch pipe connection part 21 in the main body trunk | drum 11a inner wall surface. Therefore, the drainage flowing down as a swirling flow from above does not flow into the side branch pipe connecting portion 21 side and block the side branch pipe side.
Further, the drainage flowing down from the upper vertical pipe enters the drainage pipe joint A, and the drainage received by the first swirl vane 14g is strengthened by the first swirl vane 14g and goes downstream. However, since the height of the vertical rib 51a provided immediately downstream of the first swirl vane 14g is higher than that of the other vertical ribs 51b and 51c, the vertical rib 51a is not overcome.
Then, the waste water hitting the vertical rib 51a is reliably received by the second swirl vane 12c provided immediately below the vertical rib 51a, and the swirl force is strengthened by the second swirl vane 12c toward the downstream side.

Moreover, since all the joint structural members are formed of the synthetic resin composition, the drain pipe joint A can be reduced in weight and piping work is easy.
In addition, since the first joint constituent member 10 is a fire-resistant and heat-expandable resin pipe, when a fire occurs on the lower floor and the vertical pipe portion is heated by flame, the thermal expansion in the first joint constituent member 10 is performed. Graphite expands, and the first joint component 10 is in a closed state. Therefore, it is possible to prevent incineration or smoke from entering the upper floor.

Moreover, since the gate position of the second joint component member 11 is provided at the connection portion with the first joint component member 10, the residual strain toward the inner diameter direction of the second joint component member 11 is applied to the second joint component member 11. However, the closed portion of the first joint component member 10 becomes a heat retaining portion, and even if the portion above the floor slab S of the main body trunk portion 11a is exposed to this retained heat, it is difficult to be thermally deformed.
Therefore, a gap is not generated between the mortar M due to the deformation, and the sealing surface is not held and smoke is not generated.

The fireproof drainage collective joint of the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the second joint component member includes the side branch pipe connection portion forming cylinder portion in three directions, but may be provided in two directions or may be provided only in one direction. .
In the above embodiment, three swirl vanes are provided in the vertical direction, but two or less may be used as long as the drainage capacity can be secured.
In the above embodiment, the fourth joint component member includes the lower receiving port. However, the lower part of the fourth joint component member may be in the shape of an outlet.
Further, in the above embodiment, all of the joints are made of resin, but the joint body is made of a synthetic resin not containing expansive graphite, and a fireproof layer made of an inorganic material is provided around the joint body. Alternatively, a two-layer structure may be used.

  Examples of the present invention and comparative examples will be described below.

Example 1
The drainage pipe joint shown in FIG. 1 provided in each part dimension was produced.
Inner diameter of main body 11a: 140 mm
Inner diameter of first joint component 10: 125 mm
Inclination angle of the first swirl vane 14g: 35 °
Projected area ratio of the first swirl blade 14g: 14%
Inclination angle of second swirl vane 12c: 29 °
Projected area ratio of second swirl vane 12c: 20%
Inclination angle of third swirl blade 52: 34 °
Projected area ratio of the third swirl blade 52: 21%
Height of vertical rib 51a: 20mm
Angle α: 90 °
Angle β: 157 °
Height difference between the lower end of the first swirl vane 14g and the upper end of the second swirl vane 12c: 41 mm

(Example 2)
The drainage pipe joint shown in FIG. 1 provided in each part dimension was produced.
Inner diameter of main body 11a: 140 mm
Inner diameter of first joint component 10: 125 mm
Inclination angle of the first swirl vane 14g: 35 °
Projected area ratio of the first swirl blade 14g: 14%
Inclination angle of second swirl vane 12c: 29 °
Projected area ratio of second swirl vane 12c: 20%
Inclination angle of third swirl blade 52: 34 °
Projected area ratio of the third swirl blade 52: 21%
Height of vertical rib 51a: 20mm
Angle α: 90 °
Angle β: 167 °
Height difference between the lower end of the first swirl vane 14g and the upper end of the second swirl vane 12c: 41 mm

(Comparative Example 1)
The drainage pipe joint shown in FIG. 1 provided in each part dimension was produced.
Inner diameter of main body 11a: 140 mm
Inner diameter of first joint component 10: 125 mm
Inclination angle of the first swirl vane 14g: 35 °
Projected area ratio of the first swirl blade 14g: 14%
Inclination angle of second swirl vane 12c: 29 °
Projected area ratio of second swirl vane 12c: 20%
Inclination angle of third swirl blade 52: 34 °
Projected area ratio of the third swirl blade 52: 21%
Height of vertical rib 51a: 20mm
Angle α: 90 °
Angle β: 157 °
Height difference between the lower end of the first swirl vane 14g and the upper end of the second swirl vane 12c: 200 mm

(Comparative Example 2)
The drainage pipe joint shown in FIG. 1 provided in each part dimension was produced.
Inner diameter of main body 11a: 140 mm
Inner diameter of first joint component 10: 125 mm
Inclination angle of the first swirl vane 14g: 35 °
Projected area ratio of the first swirl blade 14g: 14%
Inclination angle of second swirl vane 12c: 29 °
Projected area ratio of second swirl vane 12c: 20%
Inclination angle of third swirl blade 52: 34 °
Projected area ratio of the third swirl blade 52: 21%
Height of vertical rib 51a: 20mm
Angle α: 51 °
Angle β: 146 °
Height difference between the lower end of the first swirl vane 14g and the upper end of the second swirl vane 12c: 40 mm

(Comparative Example 3)
The drainage pipe joint shown in FIG. 1 provided in each part dimension was produced.
Inner diameter of main body 11a: 140 mm
Inner diameter of first joint component 10: 125 mm
Inclination angle of the first swirl vane 14g: 35 °
Projected area ratio of the first swirl blade 14g: 14%
Inclination angle of second swirl vane 12c: 29 °
Projected area ratio of second swirl vane 12c: 20%
Inclination angle of third swirl blade 52: 34 °
Projected area ratio of the third swirl blade 52: 21%
Height of vertical rib 51a: 20mm
Angle α: 29 °
Angle β: 147 °
Height difference between the lower end of the first swirl vane 14g and the upper end of the second swirl vane 12c: 41 mm

(Comparative Example 4)
The drainage pipe joint shown in FIG. 1 provided in each part dimension was produced.
Inner diameter of main body 11a: 140 mm
Inner diameter of first joint component 10: 125 mm
Inclination angle of the first swirl vane 14g: 35 °
Projected area ratio of the first swirl blade 14g: 14%
Inclination angle of second swirl vane 12c: 29 °
Projected area ratio of second swirl vane 12c: 20%
Inclination angle of third swirl blade 52: 34 °
Projected area ratio of the third swirl blade 52: 21%
Height of vertical rib 51a: 20mm
Angle α: 29 °
Angle β: 167 °
Height difference between the lower end of the first swirl vane 14g and the upper end of the second swirl vane 12c: 41 mm

(Comparative Example 5)
The drainage pipe joint shown in FIG. 1 provided in each part dimension was produced.
Inner diameter of main body 11a: 140 mm
Inner diameter of first joint component 10: 125 mm
Inclination angle of the first swirl vane 14g: 35 °
Projected area ratio of the first swirl blade 14g: 14%
Inclination angle of second swirl vane 12c: 29 °
Projected area ratio of second swirl vane 12c: 20%
Inclination angle of third swirl blade 52: 34 °
Projected area ratio of the third swirl blade 52: 21%
Height of vertical rib 51a: 20mm
Angle α: 284 °
Angle β: 223 °
Height difference between the lower end of the first swirl vane 14g and the upper end of the second swirl vane 12c: 41 mm

Experimental drainage pipes corresponding to the 17th floor of condominiums using the drainage pipe joints produced in Examples 1 and 2 and Comparative Examples 1 to 5 on each floor (standing pipes are 100A VP pipes) are formed. The drainage was made to flow gradually from the equivalent of the 17th floor of the vertical pipe, and the maximum drainage in which the maximum negative pressure generated in the pipes in all drainage pipe joints did not exceed 400 Pa was examined.
Further, it is determined whether or not the drainage received by the first swirl vane 14g is received by the second swirl vane 12c and whether or not the drainage received by the second swirl vane 12c is received by the third swirl vane 52. It was.

Table 1 also shows the maximum drainage amount and whether or not the second swirl vane 12c receives the drainage and the third swirl vane 52 receives the drainage received by the second swirl vane 12c. .
In Table 1, “Noru” is indicated when drainage is received, and “No” is indicated when drainage is not received.

A Drainage pipe joint 10 First joint component (fireproof and thermally expandable pipe)
11 Second joint constituent member 11a Main body trunk part 11b Side branch pipe connecting part forming cylinder part 12 Third joint constituent member 12c Second swirl vane 13 Fourth joint constituent member 13b Taper cylindrical part 14 Fifth joint constituent member 14g First Swirling blade 15 Sixth joint constituent member 16 Seventh joint constituent member 17 Eighth joint constituent member 18 Ninth joint constituent member 19 Tenth joint constituent member 20 Eleventh joint constituent member 21 Side branch pipe connecting portion 31 First packing 32 First 2 packing 33 3rd packing 51a, 51b, 51c Vertical rib 52 3rd swirl | wing blade P1 Drainage pipe P2, P3 Side branch pipe

Claims (6)

A main body barrel having an inner diameter larger than that of the vertical pipe connected to the upper and lower sides, at least one side branch pipe connecting portion provided so as to protrude from the wall surface of the main body barrel, and provided below the main body barrel. In a drainage pipe joint comprising a tapered tube portion that gradually decreases in diameter toward the lower end side,
A first swirl blade provided inside the main body barrel,
A second swirl blade provided below the lower end of the first swirl blade;
A third swirl vane provided below the lower end of the second swirl vane and in the tapered tube portion;
In the first to third swirl vanes, the drainage received by the first swirl vane is received by the second swirl vane and becomes a swirl flow that is not received by the third swirl vane. And the wastewater that is not received by the second swirl vane is directly received by the third swirl vane and arranged to be a swirl flow ,
And,
A drainage pipe joint , wherein the first to third swirl blades are inclined at an inclination angle of 15 to 50 degrees with respect to a pipe axis of the vertical pipe. A perpendicular line L2 from the middle point C1 of the line segment L1 connecting the upper edge of the first swirl vane and the lower edge of the outer edge to the central axis of the main body,
A perpendicular line L4 from the midpoint C2 of the line segment L3 connecting the outer edge upper end and the outer edge lower end of the second swirl vane to the central axis of the main body body;
A perpendicular line L6 from the midpoint C3 of the line segment L5 connecting the outer edge upper end and the outer edge lower end of the third swirl vane to the central axis of the main body trunk portion,
When the perpendicular line L2, the perpendicular line L4, and the perpendicular line L6 are projected in the direction of the central axis from the first swirl blade side toward the third swirl blade side, the angle formed between the projected perpendicular line L2 and the perpendicular line L4 is 70 to 90 °. The drainage pipe joint according to claim 1, wherein an angle formed between the perpendicular line L4 and the perpendicular line L6 that is satisfied and satisfies 150 to 200 °.   The drainage pipe joint according to claim 1 or 2, wherein a difference in height between the lower end of the first swirl vane and the upper end of the second swirl vane is greater than 0 and less than or equal to twice the inner diameter of the main body barrel.   The horizontal branch pipe connecting portion is provided with a vertical rib on the inner wall surface of the main body barrel portion, which obstructs the entry of drainage from upstream into the main body barrel side opening of the horizontal branch pipe merge portion. The drainage pipe joint described. The drainage pipe joint according to any one of claims 1 to 4, wherein an inclination angle of the second swirl vane is smaller than an inclination angle of the first swirl vane and the third swirl vane . The drainage pipe joint according to any one of claims 1 to 5, wherein the vertical rib is provided at a position where the drainage received by the first swirl vane hits the vertical rib and is received by the second swirl vane .

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