Piping structure

Abstract

To provide a piping structure capable of preventing water from entering the inside in a radial direction with respect to a cover.SOLUTION: A piping structure 1 comprises: a collective pipe joint 10 having a joint body 24 having vertical pipe connection parts 16, 21 connectable to vertical pipes P1, P5, and a horizontal pipe connection part 17 protruding toward the outer peripheral surface of the joint body and connectable to a horizontal pipe P3; and a cover 30 that covers the collective pipe joint. The cover has: a body cover 39 that has a through hole 30a in which the horizontal pipe connection part is arranged, and covers the joint body; and a branch cover 36 that protrudes outward from an opening peripheral part of the through hole in the body cover, and covers the horizontal pipe connection part. The cover comprises a first sealing part 45 that covers the horizontal pipe connection part and the branch cover.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a piping structure. [Background technology]

[0002] Conventionally, a piping structure in which an upper cover and a lower cover are wrapped around a collecting pipe joint is known (see, for example, Patent Document 1). In the collecting pipe joint, a horizontal pipe connecting portion is provided on the joint body. The horizontal pipe connecting portion penetrates the upper cover. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-116732 Summary of the Invention [Problem to be solved by the invention]

[0004] This type of piping structure is used in multi-story buildings (architectures) such as apartment buildings and hotels. In multi-story buildings, adjacent floors in the vertical direction are separated by floor slabs. Slab holes are formed in the floor slabs. Part of the piping structure is placed in the slab holes of the floor slab, and the slab holes are backfilled with a filler material such as mortar.

[0005] When it rains during the construction of a piping structure in a multi-story building, water may accumulate on the floor slab. If this water enters the radially inward direction of the upper cover through the portion of the upper cover where the horizontal pipe connection part is passed, there is a risk that it will leak into the floor below the floor slab.

[0006] The present invention has been made in consideration of such problems, and has an object to provide a piping structure that prevents water from entering radially inward of the cover. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention proposes the following means. The piping structure of the present invention comprises a fitting body having a vertical pipe connection portion connectable to a vertical pipe, a collecting pipe fitting protruding from the outer peripheral surface of the fitting body and having a horizontal pipe connection portion connectable to a horizontal pipe, and a cover covering the collecting pipe fitting, wherein the cover has a through hole formed therein in which the horizontal pipe connection portion is disposed, and comprises: a main body cover covering the fitting body, and a branch cover protruding outward from the opening peripheral portion of the through hole in the main body cover and covering the horizontal pipe connection portion, and is characterized by comprising a first sealing portion covering the horizontal pipe connection portion and the branch cover.

[0008] In this invention, a collecting pipe joint to which a vertical pipe and a horizontal pipe can be connected can be covered with a cover. In this case, the first sealing portion covers the horizontal pipe connecting portion and the branch cover, making it difficult for water to enter between the horizontal pipe connecting portion and the branch cover and to enter inside the branch cover. Furthermore, because the branch cover protrudes from the opening periphery of the through hole, water is difficult to enter radially inside the main cover from the through hole in the main cover. Therefore, water can be prevented from entering radially inside the cover.

[0009] In the piping structure, the cover may include a sound-insulating cover made of synthetic rubber that extends from the joint body to the horizontal pipe connection portion. In this invention, even if the sound-insulating cover is formed in a sheet shape that becomes flat when unfolded, since synthetic rubber is easily deformed, the part of the sound-insulating cover that covers the horizontal pipe connection portion can be deformed from its flat shape to a shape that conforms to the horizontal pipe connection portion.

[0010] Another piping structure of the present invention comprises a fitting body having a vertical pipe connection portion connectable to a vertical pipe, a collecting pipe fitting having a horizontal pipe connection portion protruding from the outer peripheral surface of the fitting body and connectable to a horizontal pipe, and a cover covering the collecting pipe fitting, wherein the cover has a through hole formed therein in which the horizontal pipe connection portion is disposed, and comprises a main body cover covering the fitting body and a branch cover covering the horizontal pipe connection portion, and is characterized by comprising a tubular first sealing portion covering the horizontal pipe connection portion and the branch cover, and a second sealing portion sealing between the opening peripheral portion of the through hole in the main body cover and the branch cover.

[0011] In this invention, a collecting pipe joint to which a vertical pipe and a horizontal pipe can be connected can be covered with a cover. In this case, the first sealing portion covers the horizontal pipe connecting portion and the branch cover, making it difficult for water to enter between the horizontal pipe connecting portion and the branch cover and to enter inside the branch cover. Furthermore, the second sealing portion seals the gap between the branch cover and the peripheral edge of the opening of the through hole in the main cover, making it difficult for water to enter radially inside the main cover from the through hole in the main cover. Therefore, water can be prevented from entering radially inside the cover. [Effects of the Invention]

[0012] The piping structure of the present invention can prevent water from entering the area radially inward of the cover. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a partially cutaway front view of a piping structure according to a first embodiment of the present invention. [Figure 2] FIG. 5 is a partially cutaway front view of a main part of a piping structure according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] (First embodiment) A first embodiment of a piping structure according to the present invention will be described below with reference to FIG. As shown in Fig. 1, the piping structure 1 of this embodiment is used in a multi-story building (architecture) 101. In the multi-story building 101, a plurality of stories 102 are stacked in the vertical direction. A floor slab 103 separates the plurality of stories 102 (i.e., upper and lower floors). A slab hole 103a is formed in the floor slab 103, penetrating in the vertical direction. The piping structure 1 includes a collecting pipe joint 10, a cover 30, and a first sealing portion 45.

[0015] Here, the collecting pipe joint 10 and the cover 30 are each formed in a cylindrical shape. The central axes (axial lines) of the collecting pipe joint 10 and the cover 30 are arranged coaxially with a common axis. Hereinafter, the common axis will be referred to as the axis O1, and the direction along the axis O1 will be referred to as the axis O1 direction. The collecting pipe joint 10 and the cover 30 are arranged with the axis O1 aligned in the vertical direction. Note that they may also be arranged so that the axis O1 is inclined with respect to the vertical direction.

[0016] In the direction of the axis O1, the side of the lower connecting pipe 12 relative to the upper connecting pipe 11 described later is referred to as the downward Z1, and the side of the upper connecting pipe 11 relative to the lower connecting pipe 12 is referred to as the upward Z2. When viewing the piping structure 1 from the top-bottom direction, the direction perpendicular to the axis O1 is referred to as the radial direction, and the direction going around the axis O1 is referred to as the circumferential direction. However, the downward Z1 and upward Z2 in the drawing are merely for convenience of showing the directions, and are actually directions relative to a reference point.

[0017] The shape of the collecting pipe joint 10 is not particularly limited as long as it has vertical pipe connecting portions 16, 21 and a horizontal pipe connecting portion 17, which will be described later. For example, the collecting pipe joint 10 has an upper connecting pipe 11 and a lower connecting pipe 12.

[0018] The upper connecting pipe 11 has an upper main body 15 , an upper vertical pipe connecting portion (vertical pipe connecting portion) 16 , and a horizontal pipe connecting portion 17 . The upper body 15 is cylindrical. However, the upper body 15 may be cylindrical, such as a square tube. A vertical rib (not shown) extending in the vertical direction is provided inside the upper body 15. The vertical rib is arranged so as to avoid the opening on the base end side of the horizontal pipe connecting portion 17. A plurality of ribs (not shown) may be provided on the outer peripheral surface of the upper body 15. The plurality of ribs protrude radially outward from the upper body 15. For example, four sets of three ribs spaced apart in the axial direction O1 are arranged at intervals in the circumferential direction. The four sets of ribs are arranged at equal intervals in the circumferential direction. The radial size of each rib is not particularly limited. When the collecting pipe joint 10 is installed in the multi-story building 101, the collecting pipe joint 10 is held in place by support fittings (not shown) contacting the multiple ribs from the radially outer side.

[0019] In this example, the upper vertical pipe connection part 16 is a receiving port. The upper vertical pipe connection part 16 is provided at the upper end part of the upper main body 15. The upper vertical pipe connection part 16 is connectable to a first vertical pipe (vertical pipe) P1. The first vertical pipe P1 is a pipe made of a resin such as polyethylene or polyvinyl chloride. The lower end part of the first vertical pipe P1 is disposed within the upper vertical pipe connection part 16. It is preferable that a stopper that restricts the movement of the first vertical pipe P1 downward Z1 and a sealing member that watertightly seals the gap between the first vertical pipe P1 and the upper vertical pipe connection part 16 are provided within the upper vertical pipe connection part 16. The upper vertical pipe connection portion may be a spigot, a flange, or the like.

[0020] The horizontal pipe connecting portions 17 protrude radially outward from the outer peripheral surface of the upper body 15. In this example, the horizontal pipe connecting portions 17 are sockets. In this embodiment, the collecting pipe joint 10 has two horizontal pipe connecting portions 17. The directions in which the two horizontal pipe connecting portions 17 extend form an angle of 90° in plan view. The number of horizontal pipe connecting portions 17 that the collecting pipe joint 10 has may be one, or may be three or more. The horizontal pipe connecting portion may be a spigot, a flange, or the like.

[0021] The horizontal pipe connecting portion 17 has a connecting portion main body 17a and a socket unit 17b. The connecting portion main body 17a is cylindrical and protrudes radially outward from the outer circumferential surface of the upper body 15. Hereinafter, the portion of the upper body 15 (the coupling main body 24 described below) where the horizontal pipe connecting portion 17 is provided will be referred to as the connecting portion installation portion 15b. The receiving unit 17b can be attached to and detached from the connection body 17a. The receiving unit 17b can be connected to the horizontal pipe P3. The horizontal pipe P3 has a configuration similar to the first vertical pipe P1, except that the horizontal pipe P3 has a smaller outer diameter than the first vertical pipe P1. The horizontal pipe P3 has a water gradient and is arranged along a substantially horizontal plane. The end of the horizontal pipe P3 is arranged within the receiving unit 17b. It is preferable that a stopper and a sealing member are provided within the receiving unit 17b, as with the upper vertical pipe connection part 16. Note that socket unit 17b may be configured integrally with connection portion main body 17a.

[0022] The upper body 15, vertical ribs, upper vertical pipe connecting portion 16, and connecting portion body 17a that constitute the upper connecting pipe 11 are integrally formed by injection molding or the like using a resin composition. Examples of resins constituting the resin composition include polyolefin resins such as polyethylene resins and polypropylene resins, ABS resins, and polyvinyl chloride resins, with polyvinyl chloride resins being preferred. The term "polyolefin resin" refers to a resin consisting of polyolefin alone, or, in the case of a resin containing multiple types of resins, a resin in which the resin with the largest mass is polyolefin. Similarly, the term "polyvinyl chloride resin" refers to a resin consisting of polyvinyl chloride alone, or, in the case of a resin containing multiple types of resins, a resin in which the resin with the largest mass is polyvinyl chloride.

[0023] A fire-resistant material containing a thermal expansion material may be provided on the outer or inner surface located within the slab hole 103a of the upper connecting pipe 11. The thermal expansion material may be any material that expands due to heat generated during a fire, such as thermally expandable graphite. When providing the fire-resistant material on the outer surface of the upper connecting pipe 11, the fire-resistant material may be provided by wrapping a sheet of the fire-resistant material around the pipe. When providing the fire-resistant material on the inner surface of the upper connecting pipe 11, the fire-resistant material may be provided by placing a cylindrical tubular fire-resistant material inside the lower part of the upper connecting pipe 11. The cylindrical tubular fire-resistant material will be described in detail below.

[0024] The lower connecting pipe 12 has an inclined pipe section 20 and a lower vertical pipe connecting section (vertical pipe connecting section) 21. The upper main body 15, the upper vertical pipe connecting section 16, the inclined pipe section 20, and the lower vertical pipe connecting section 21 constitute a joint main body 24. The inclined pipe section 20 has a cylindrical shape whose outer diameter and inner diameter both become smaller as it goes downward Z1. Inside the inclined pipe section 20, a flow straightening plate 20a extending in the vertical direction is provided. For example, the inclined pipe portion 20 is manufactured by injection molding a resin composition. Examples of resins that can be used to form the inclined pipe section 20 include polyolefin resins and polyvinyl chloride resins, and among these, polyvinyl chloride resins are preferred. Polyvinyl chloride resins can more reliably close the pipe in the event of a fire.

[0025] A fire-resistant material 18 containing a thermal expansion material may be provided on the outer or inner surface located inside the slab hole 103a of the lower connecting pipe 12. The thermal expansion material may be any material that expands due to heat generated during a fire, such as thermally expandable graphite. When providing the fire-resistant material on the outer surface of the lower connecting pipe 12, the fire-resistant material may be provided by wrapping a sheet of the fire-resistant material around the outer surface. When providing the fire-resistant material on the inner surface of the lower connecting pipe 12, the fire-resistant material 18 may be provided by placing a cylindrical tubular fire-resistant material 18 inside the upper part of the lower connecting pipe 12. The fireproof material 18 may be provided on both the upper connecting pipe 11 and the lower connecting pipe 12, or may be provided in a range spanning the lower part of the upper connecting pipe 11 and the upper part of the lower connecting pipe 12.

[0026] The fire-resistant material 18 formed into a cylindrical tube shape may have a single-layer structure made entirely of a single resin composition, or a multi-layer structure made up of multiple layers. When the fire-resistant material 18 has a multi-layer structure, it is sufficient that any one of the layers is formed from a resin composition containing a thermal expansion material. For example, when the fire-resistant material 18 has a three-layer structure consisting of a surface layer, a middle layer, and an inner layer, the middle layer may be formed from a resin composition containing a thermal expansion material.

[0027] The surface layer, intermediate layer, and inner layer may contain a heat-absorbing agent, such as inorganic hydroxides such as magnesium hydroxide, aluminum hydroxide, kaolin minerals (kaolinite, halloysite, dickite), and hydrotalsalcite, and inorganic compounds with water absorption properties such as sepiolite, bentonite, montmorillonite, talc, mica, quartz, zeolite, wollastonite, and nepheline syenite.

[0028] When the intermediate layer contains thermally expandable graphite, the intermediate layer is black, so it is preferable that the surface layer and the inner layer contain a colorant other than black so that they can be distinguished from the intermediate layer. The thickness of the surface layer and the inner layer is preferably 0.3 mm or more and 3.0 mm or less, and more preferably 0.6 mm or more and 1.5 mm or less. If the thickness of the surface layer and the inner layer, i.e., the coating layer, is 0.3 mm or more, the mechanical strength of the inclined pipe section 20 as a pipe can be sufficiently ensured. If the thickness of the coating layer is 3.0 mm or less, the decrease in the fire resistance of the inclined pipe section 20 can be suppressed. The inclined pipe portion 20 preferably satisfies the performance requirements set forth in JIS K6741, Hard Polyvinyl Chloride Pipe.

[0029] In this example, the lower vertical pipe connection portion 21 is a socket. The lower vertical pipe connection portion 21 is configured similarly to the upper vertical pipe connection portion 16. The lower vertical pipe connection portion 21 is provided at the lower end of the inclined pipe portion 20. The lower vertical pipe connection portion 21 can be connected to a second vertical pipe (vertical pipe) P5. The second vertical pipe P5 is a pipe configured similarly to the first vertical pipe P1. The lower vertical pipe connecting portion 21 is formed of the same material as the upper connecting pipe 11. The lower vertical pipe connecting portion may be a spigot, a flange, or the like. The upper connecting pipe 11 and the lower connecting pipe 12 are manufactured separately, and the upper body 15 and the inclined pipe portion 20 are connected to each other with an adhesive or the like. The collecting pipe joint 10 configured as above is made of resin. That is, in this embodiment, the collecting pipe joint 10 is configured by connecting two members, namely, connecting pipes 11 and 12. The collecting pipe joint 10 may be configured with one member, or may be configured with three or more members.

[0030] The cover 30 covers the collecting pipe joint 10 from the radial outside. There are no limitations on the configuration of the cover 30. For example, the cover 30 includes a sound-absorbing cover 31 and a sound-insulating cover 32. The sound-absorbing cover 31 is formed in a sheet shape that is flat when unfolded. The sound-absorbing cover 31 is wrapped around the joint body 24 and covers the joint body 24 from the radial outside. The sound-absorbing cover 31 is cylindrical. The sound-absorbing cover 31 is formed with a sound-absorbing through-hole 31a through which the horizontal pipe connection portion 17 passes.

[0031] The sound-absorbing cover 31 is made of, for example, needle felt. For example, needle felt contains 40% to 50% polyethylene terephthalate, 35% to 45% acrylic fiber, and 10% to 20% wool / rayon. When manufacturing needle felt, barbed needles are inserted into the needle felt to mechanically entangle the fibers. The sound absorbing cover 31 may be made of felt such as thermal felt or PET felt, an acrylic fiber mixture, glass wool, rock wool, urethane foam, etc. The density of the sound absorbing cover 31 is 80 kg / m 3 The thickness of the sound absorbing cover 31 is preferably about 10 mm.

[0032] The sound-insulating cover 32 is preferably formed in a sheet shape that is flat when unfolded. The sound-insulating cover 32 has a sound-insulating main body cover 35 and a sound-insulating branch cover (branch cover) 36. The sound-absorbing cover 31 and the sound-insulating main body cover 35 constitute a main body cover 39. The main body cover 39 covers the joint main body 24 from the radial outside. The cover 30 has the main body cover 39 and the sound-insulating branch cover 36. The sound-insulating main body cover 35 is cylindrical. The sound-insulating main body cover 35 is wrapped around the sound-absorbing cover 31 and covers the sound-absorbing cover 31 from the radially outer side. The sound-insulating main body cover 35 is in direct contact with the outer peripheral surface of the sound-absorbing cover 31. The sound-insulating main body cover 35 is formed with a sound-insulating through-hole 35a for passing the horizontal pipe connection part 17 through. The sound-absorbing through-hole 31a of the sound-absorbing cover 31 and the sound-insulating through-hole 35a together form the through-hole 30a of the cover 30.

[0033] The horizontal pipe connecting portion 17 is disposed inside a through hole 30a formed in the cover 30. The sound-insulating branch cover 36 is cylindrical. The sound-insulating branch cover 36 protrudes radially outward from the opening periphery of the sound-insulating through-hole 35a in the sound-insulating main body cover 35 (the opening periphery of the through-hole 30a in the main body cover 39). In other words, the sound-insulating main body cover 35 and the sound-insulating branch cover 36 are connected without any gaps. The sound-insulating branch cover 36 covers the horizontal pipe connection portion 17.

[0034] The sound-insulating main body cover 35 and the sound-insulating branch cover 36 that constitute the sound-insulating cover 32 extend from the joint body 24 to the horizontal pipe connection portion 17 . The sound-insulating cover 32 is preferably made of synthetic rubber such as modified asphalt, elastomer, polyolefin resin, or soft vinyl chloride resin. The sound-insulating cover 32 may contain inorganic materials such as calcium carbonate or barium sulfate, metal sheets such as iron or lead, or metal powder. The thickness of the sound-insulating cover 32 is preferably 1.0 mm or more and 5.0 mm or less, and more preferably 1.5 mm or more and 4.0 mm or less. Furthermore, a surface material such as synthetic fiber nonwoven fabric or glass fiber nonwoven fabric may be laminated on one or both sides of the sound-insulating cover 32.

[0035] The sound-insulating cover 32 may be made of an elastic resin material such as an olefin-based material (a resin composition containing 100 parts by weight of olefin-based resin and 300 to 600 parts by weight of inorganic filler). The thickness of the sound-insulating cover 32 is preferably about 1 to 5 mm, and more preferably about 2 mm. The surface density of the sound-insulating cover 32 is preferably 1 to 8 kg / m 2 It is preferable that the 2 It is more preferable that the degree of

[0036] The inorganic filler is not particularly limited, but examples thereof include 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, dawnnite, 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 metal powders, 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, and dewatered sludge. Of these, calcium carbonate is preferably used as the inorganic filler in view of the balance between weight and cost. These may be used alone or in combination of two or more.

[0037] The olefin resin is not particularly limited, but examples thereof include low-density polyethylene (PE), high-density polyethylene, linear low-density polyethylene, atactic polypropylene, isotactic polypropylene, syndiotactic polypropylene, and poly-α-olefin.3 The olefin resin is preferably polyethylene having a density of 0.87 g / cm. 3 If the sound insulation cover 32 is less than 0.93 g / cm 3 If the bending modulus of elasticity of the olefin resin is more than 100 to 3000 kg / cm, the sound insulating cover 32 may buckle when flattened. 2 If so, the strength and winding processability are sufficient. The sound-insulating cover 32 may be formed from a material other than an olefin-based material, such as polyvinyl chloride resin, polystyrene resin, ABS resin, AS resin, or an elastomer material such as thermoplastic elastomer (TPE).

[0038] As described above, the sound insulating main body cover 35 and the sound insulating branch cover 36 that constitute the sound insulating cover 32 are integrally formed. The portion of the cover 30 that covers the joint body 24 has a double structure with a sound-absorbing cover 31 arranged on the inside and a sound-insulating body cover 35 of the sound-insulating cover 32 arranged on the outside. The portion of the cover 30 that covers the horizontal pipe connection portion 17 has a single structure with a sound-insulating branch cover 36 of the sound-insulating cover 32.

[0039] The first sealing portion 45 is formed in a cylindrical shape. The cylindrical shape of the first sealing portion 45 does not mean a shape formed by, for example, winding a strip-shaped member around the first sealing portion 45 in the circumferential direction of the first sealing portion 45, but means a shape formed seamlessly around the circumferential direction of the first sealing portion 45. The first sealing portion 45 covers the horizontal pipe connecting portion 17 and the sound-insulating branch cover 36 from the outside. In this example, the first sealing portion 45 covers the connecting portion main body 17a of the horizontal pipe connecting portion 17 from the outside.

[0040] For example, the inclined pipe section 20 of the piping structure 1 is arranged in a slab hole 103a of the floor slab 103. The horizontal pipe P3 is arranged at a position Z2 above the floor slab 103. The lower vertical pipe connection section 21 protrudes below the floor slab 103 at a position Z1. A filler 104 such as mortar is filled between the piping structure 1 and the periphery of the opening of the slab hole 103a in the floor slab 103. In the multi-story building 101, drainage facilities such as toilets (not shown) are provided on the floor 102 above the floor slab 103. The drainage facilities are connected to the first vertical pipe P1 and the horizontal pipe P3.

[0041] Next, the operation of the piping structure 1 configured as above will be described. Wastewater flows from the drainage equipment into the collecting pipe joint 10 through the first vertical pipe P1 and horizontal pipe P3. The wastewater flows downward Z1 while hitting the vertical ribs and the flow straightening plate 20a inside the collecting pipe joint 10. The wastewater flows from the collecting pipe joint 10 into the second vertical pipe P5 and is drained appropriately. The cover 30 makes it difficult for noise generated when wastewater flows through the collecting pipe joint 10 to leak outside the cover 30.

[0042] Next, a description will be given of the flow of water (rainwater) when the piping structure 1 configured as above is installed in the multi-story building 101. At this time, the filler material 104 is filled in the slab holes 103a. When it rains on the multi-story building 101, water (not shown) may accumulate on the floor slab 103. Here, for example, a structure that does not include the sound-insulating branch cover 36 and the first sealing portion 45 in comparison with the piping structure 1 is defined as a conventional piping structure. In the conventional piping structure, water accumulated on the floor slab 103 may enter the radially inward direction of the cover 30 through the portion of the cover 30 through which the horizontal pipe connection portion 17 passes, as shown by arrow A1. In this case, the water may leak into the layer 102 below the floor slab 103, Z1, through the gap between the joint body 24 and the cover 30.

[0043] To address this issue, in the piping structure 1 of this embodiment, the collecting pipe joint 10, to which the first vertical pipe P1 and the horizontal pipe P3 can be connected, can be covered by the cover 30. In this case, the first sealing portion 45 covers the horizontal pipe connection portion 17 and the sound-insulating branch cover 36, making it difficult for water to enter between the horizontal pipe connection portion 17 and the sound-insulating branch cover 36 and to enter inside the sound-insulating branch cover 36. Furthermore, because the sound-insulating branch cover 36 protrudes from the opening periphery of the through-hole 30a, water is unlikely to enter from the through-hole 30a of the cover 30 radially inward of the main cover 39. Therefore, water can be prevented from entering radially inward of the cover 30.

[0044] The cover 30 has a sound-insulating cover 32. Even if the sound-insulating cover 32 is formed in a sheet shape that is flat when unfolded, because synthetic rubber is easily deformed, the portion of the sound-insulating cover 32 that covers the horizontal pipe connecting portion 17 can be deformed from its flat shape to a shape that conforms to the horizontal pipe connecting portion 17.

[0045] (Second embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. 2. The same components as those in the above embodiment are designated by the same reference numerals, and a description thereof will be omitted. Only the differences will be described. As shown in FIG. 2, the piping structure 2 of this embodiment includes a cover 50 and a second sealing portion 65 instead of the cover 30 in the piping structure 1 of the first embodiment. The cover 50 includes a main body cover 51 and a branch cover 52 . The body cover 51 covers the radially outer side of the joint body 24. The body cover 51 has a body sound absorbing cover 55 and a body sound insulating cover 56. The main body sound absorbing cover 55 is configured similarly to the sound absorbing cover 31. The main body sound insulating cover 56 is configured similarly to the sound insulating main body cover 35. The main body cover 51 is formed with a through hole 51a inside which the horizontal pipe connecting portion 17 is disposed.

[0046] The branch cover 52 covers the horizontal pipe connection portion 17 from the outside. The branch cover 52 has a branch sound-absorbing cover 59 and a branch sound-insulating cover 60. The branch sound-absorbing cover 59 is formed in a cylindrical shape. The branch sound-absorbing cover 59 covers the horizontal pipe connection portion 17 from the outside. The branch sound-absorbing cover 59 is formed from the same material as the sound-absorbing cover 31. The branch sound-insulating cover 60 is configured in the same manner as the sound-insulating branch cover 36. The branch sound-insulating cover 60 covers the branch sound-absorbing cover 59 from the outside. The second sealing portion 65 is an adhesive layer formed in a circular shape, etc. The second sealing portion 65 seals the gap between the branch cover 52 and the periphery of the opening of the through-hole 51a in the main body cover 51 in a watertight manner. In Figure 2, the end of the branch sound-absorbing cover 59 and the first sealing portion 45 are positioned to cover the outer surface of the connection portion main body 17a, but the end of the branch sound-absorbing cover 59 may be positioned up to the outer surface of the receptacle unit 17b, and the first sealing portion 45 may cover the outer surface of the receptacle unit 17b.

[0047] As described above, the main body cover 51 and the branch cover 52 are configured as separate bodies and are connected to each other by the second sealing portion 65. The portion of the cover 50 that covers the joint body 24 has a double structure with a main body sound-absorbing cover 55 of the main body cover 51 that is arranged on the inside, and a main body sound-insulating cover 56 of the main body cover 51 that is arranged on the outside. The portion of the cover 50 that covers the horizontal pipe connection portion 17 has a double structure with a branch sound-absorbing cover 59 of the branch cover 52 that is arranged on the inside, and a main branch sound-insulating cover 60 of the branch cover 52 that is arranged on the outside.

[0048] In the piping structure 2 of the present embodiment configured as described above, it is possible to prevent water from entering the area radially inward of the cover 50. Furthermore, the collecting pipe joint 10, to which the first vertical pipe P1 and the horizontal pipe P3 can be connected, can be covered by the cover 50. In this case, the first sealing portion 45 covers the horizontal pipe connecting portion 17 and the branch cover 52, making it difficult for water to enter between the horizontal pipe connecting portion 17 and the branch cover 52 and to a position inside the branch cover 52. Furthermore, the second sealing portion 65 seals the space between the branch cover 52 and the opening periphery of the through hole 51a in the main body cover 51, making it difficult for water to enter radially inside the main body cover 51 from the through hole 51a in the main body cover 51. Therefore, water can be prevented from entering radially inside the cover 50.

[0049] Although the first and second embodiments of the present invention have been described above in detail with reference to the drawings, the specific configurations are not limited to these embodiments, and the present invention also includes modifications, combinations, deletions, etc. of the configurations within the scope of the gist of the present invention. Furthermore, it goes without saying that the configurations shown in each embodiment can be used in appropriate combinations. For example, in the first and second embodiments, the cover may include an upper cover and a lower cover. In this case, the upper cover covers the connection portion installation portion 15b and a portion Z2 above the connection portion installation portion 15b of the joint body 24 from the radially outer side. The lower cover covers a portion Z1 below the portion of the joint body 24 covered by the upper cover. In the first and second embodiments, the piping structures 1 and 2 do not necessarily have to include the vertical ribs and the flow straightening plates 20a. [Explanation of symbols]

[0050] 1,2 Piping structure 10 Collector joint 16 Upper vertical pipe connection (vertical pipe connection) 17 Horizontal pipe connection 21 Lower vertical pipe connection (vertical pipe connection) 24 Joint body 30,50 cover 30a,51a through hole 32 Soundproof cover 36 Soundproof branch cover (branch cover) 39,51 Main unit cover 45 First sealing part 52 Branch Cover 65 Second sealing part P1 First vertical pipe (vertical pipe) P3 horizontal pipe P5 Second vertical pipe (vertical pipe)

Claims

1. a joint body having a vertical pipe connection portion connectable to a vertical pipe, and a collecting pipe joint having a horizontal pipe connection portion protruding from an outer peripheral surface of the joint body and connectable to a horizontal pipe; a cover that covers the collecting pipe joint; Equipped with The cover is a main body cover that covers the joint main body and has a through hole formed therein in which the horizontal pipe connection portion is disposed; a branch cover that protrudes outward from an opening periphery of the through hole in the main body cover and covers the horizontal pipe connection portion; and The main body cover is A sound-absorbing cover and a sound-insulating cover that covers the sound-absorbing cover; and the opening periphery of the through hole of the sound absorbing cover faces the horizontal pipe connecting portion, an end surface of the branch cover faces a peripheral portion of the opening of the through hole of the sound-insulating cover; A piping structure comprising a first sealing portion that covers the horizontal pipe connection portion and the branch cover.

2. The horizontal pipe connection portion has a receiving unit to which the horizontal pipe is connected at an end thereof, The piping structure according to claim 1 , wherein the first sealing portion covers an outer surface of the receptacle unit.

3. a joint body having a vertical pipe connection portion connectable to a vertical pipe, and a collecting pipe joint having a horizontal pipe connection portion protruding from an outer peripheral surface of the joint body and connectable to a horizontal pipe; a cover that covers the collecting pipe joint; Equipped with The cover is a main body cover that covers the joint main body and has a through hole formed therein in which the horizontal pipe connection portion is disposed; a branch cover that covers the horizontal pipe connection portion; and a first sealing portion that covers the horizontal pipe connection portion and the branch cover; a second sealing portion that seals between the branch cover and an opening periphery of the through hole in the main body cover; A piping structure comprising:

4. A joint body having a vertical pipe connection part connectable to a vertical pipe, and a collecting pipe joint having a horizontal pipe connection part protruding from the outer peripheral surface of the joint body and connectable to a horizontal pipe, a cover that covers the collecting pipe joint; Equipped with The cover is a main body cover that covers the joint main body and has a through hole formed therein in which the horizontal pipe connection portion is disposed; a branch cover that covers the horizontal pipe connection portion; and the horizontal pipe connection portion includes a socket unit to which the horizontal pipe is connected at an end portion; A piping structure comprising a first sealing portion that covers the receiving port unit and the branch cover.

Images