Drain pipe fittings

Abstract

To provide drain pipe fittings with excellent drainage performance. [Solution] The drain pipe joint 10 comprises a vertical cylindrical pipe body having an upper pipe connection portion 14 and a lower pipe connection portion, and a horizontal pipe connection portion 24 branching laterally from the pipe body. A flow deflection plate 32 is formed on the inner circumferential surface of the pipe body. The flow deflection plate has a shape that bulges toward the axial center of the pipe body in a plan view, and its upper surface is formed in a convex shape, with the highest point being at the center of the base end and decreasing toward the protruding end. Right-angled or acute-angled edges are formed around the boundary between the protruding end and the lower surface of the flow deflection plate.

Description

Technical Field

[0001] The present invention relates to a drain pipe joint, and more particularly to a drain pipe joint provided at, for example, a confluence portion of a vertical drain pipe and a horizontal drain branch pipe.

Background Art

[0002] An example of a conventional drain pipe joint is disclosed in Patent Document 1. The drain collecting pipe (drain pipe joint) of Patent Document 1 has vertical connection ports (upper pipe connection portion and lower pipe connection portion) for connecting vertical drain pipes to upper and lower ends of a cylindrical body portion (pipe body), and a horizontal connection port (horizontal pipe connection portion) for connecting a horizontal branch pipe to a peripheral wall of the cylindrical body portion. Further, inside the cylindrical body portion, there are provided a deflection plate provided inclined with respect to the vertical pipe axis so as to deflect the drain flow flowing down from the vertical drain pipe to one side, and a swirling blade provided to impart swirling to the drain flow below the deflection plate.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the technique of Patent Document 1, since the deflection plate is formed in a flat plate shape inclined with respect to the vertical pipe axis, the drain is linearly deflected by the deflection plate. However, if the deflected drain flows linearly, it becomes easy for the drain to flow into the horizontal connection portion on the facing side of the deflection plate. Further, if a baffle plate is installed to prevent the inflow of the drain into the horizontal connection portion, the drain collides with the baffle plate forcefully and a turbulent flow is generated there. Then, there is a risk that troubles such as foaming of washing drain water and blockage of the drain pipe and popping out of the water seal may occur. Therefore, a drain pipe joint with improved drainage performance is desired.

[0005] Therefore, the main object of the present invention is to provide a novel drain pipe joint.

[0006] Another objective of this invention is to provide a drain pipe fitting with excellent drainage performance. [Means for solving the problem]

[0007] The first invention is a drain pipe joint comprising a vertical cylindrical pipe body having an upper pipe connection portion formed at the upper end and a lower pipe connection portion formed at the lower end, and a horizontal pipe connection portion branching laterally from the pipe body, with a bend pipe connected to the lower pipe connection portion, wherein the pipe joint comprises a plurality of flow deflection plates protruding from the inner circumferential surface of the pipe body, the flow deflection plates are positioned above the axial center of the horizontal pipe connection portion and below the lower end of the upper vertical pipe connected to the upper pipe connection portion, the flow deflection plates have a shape that bulges toward the axial center of the pipe body in a plan view, the upper surface of the flow deflection plates is formed in a convex shape that is highest at the center of the base end and decreases toward the protruding end, an edge portion of a predetermined angle is formed around the boundary between the protruding end and the lower surface of the flow deflection plate, the predetermined angle of the edge portion is a right angle or an acute angle, and the drain pipe joint is made of synthetic resin and is constructed by combining a plurality of members (except in the case where the lower end of the cylindrical portion on which the flow deflection plates are formed hangs down below the upper edge of the base end side opening of the horizontal pipe connection portion).

[0008] The second invention is a drain pipe joint comprising a vertical cylindrical pipe body having an upper pipe connection portion formed at its upper end and a lower pipe connection portion formed at its lower end, and a horizontal pipe connection portion branching laterally from the pipe body, with a bend pipe connected to the lower pipe connection portion, wherein the pipe body is provided with a plurality of flow deflection plates protruding from its inner circumferential surface, the flow deflection plates being above the axial center of the horizontal pipe connection portion and connected to the upper pipe connection portion. The drain pipe fitting is positioned below the lower end of the upper riser, and the flow deflector has a shape that bulges toward the axial center of the pipe body in a plan view, the upper surface of the flow deflector is formed in a convex shape that is highest at the center of the base end and decreases toward the protruding end, and the longitudinal cross-section of the largest part of the flow deflector in the radial direction of the pipe body has a convex curve, an edge portion of a predetermined angle is formed at the boundary between the protruding end and the lower surface of the flow deflector, the predetermined angle of the edge portion is a right angle or an acute angle, and the drain pipe fitting is made of synthetic resin and is constructed by combining multiple members (except when the lower end of the cylindrical part on which the flow deflector is formed hangs down below the upper edge of the base end opening of the horizontal pipe connection part).

[0009] According to the first or second invention, since drainage is prevented from flowing around to the underside of the flow deflection plate, drainage can be deflected more effectively. Therefore, a drainage pipe fitting with superior drainage performance can be provided.

[0010] The third invention is dependent on the first or second invention, wherein the lower surface of the drift plate is formed in a substantially horizontal shape.

[0011] The fourth invention is dependent on any of the first to third inventions, wherein the protruding length of the maximum portion of the flow deflection plate in the radial direction of the pipe body is smaller than the width of the maximum portion of the flow deflection plate in a direction perpendicular to the radial direction of the pipe body.

[0012] The fifth invention is dependent on any of the first to fourth inventions, and the protruding length of the maximum portion of the flow deflection plate in the radial direction of the pipe body is 5 mm or more and 25 mm or less.

[0013] The sixth invention is dependent on any of the first to fifth inventions, and the width of the widest part of the flow deflection plate in a direction perpendicular to the radial direction of the pipe body is 10 mm or more and 85 mm or less.

[0014] The seventh invention is dependent on any of the first to sixth inventions and comprises a swirling vane formed on the inner circumferential surface of the pipe body at a position below the drift plate, wherein the drift plate is positioned at a circumferential position offset from the swirling vane in a plan view.

[0015] According to the seventh invention, the drainage capacity can be improved by applying a swirling force to the drainage flowing down inside the pipe body to generate a swirling flow.

Effects of the Invention

[0016] According to this invention, since the drainage is prevented from flowing around the lower surface of the flow deflecting plate, the drainage can be deflected more appropriately. Therefore, a drain pipe joint with excellent drainage performance can be provided.

[0017] The above object, other objects, features, and advantages of this invention will become clearer from the detailed description of the embodiments below with reference to the drawings.

Brief Description of the Drawings

[0018] [Figure 1] It is a front view showing a drain pipe joint which is an embodiment of this invention. [Figure 2] It is a plan view showing the drain pipe joint of FIG. 1. [Figure 3] It is a first longitudinal sectional view showing a longitudinal section of the drain pipe joint cut along the line III-III of FIG. 2. [Figure 4] It is a second longitudinal sectional view showing a longitudinal section of the drain pipe joint cut along the line IV-IV of FIG. 2. [Figure 5] (A) is a plan view showing the flow deflecting plate provided in the drain pipe joint of FIG. 1, (B) is a front view showing the flow deflecting plate, and (C) is a longitudinal sectional view showing a longitudinal section of the flow deflecting plate cut along the line V(C)-V(C) of (B). [Figure 6] It is an illustrative diagram schematically showing the flow of the drainage deflected by the flow deflecting plate. [Figure 7] It is a longitudinal sectional view showing a drain pipe joint which is another embodiment of this invention. [Figure 8] It is a longitudinal sectional view showing a longitudinal section of the periphery of the flow deflecting plate of the drain pipe joint of FIG. 7.

Modes for Carrying Out the Invention

[0019] Referring to FIGS. 1 and 2, a drain pipe joint 10 according to an embodiment of the present invention is a collecting pipe joint provided at the confluence of a drain riser 100 and a drain horizontal pipe 102 in a multi-story building such as an apartment and a commercial building. In this embodiment, a drain pipe joint 10 that joins three drain horizontal pipes 102 with an inner diameter of 75 mm to a drain riser 100 with an inner diameter of 100 mm will be illustrated and described. As will be described in detail later, the drain pipe joint 10 has a swirling blade 30 and a deflector plate 32 on the inner peripheral surface of the pipe body 12, and generates a strong swirling flow by swirling the drain deflected by the deflector plate 32 with the swirling blade 30, thereby exhibiting a drainage capacity capable of coping with high-rise buildings.

[0020] As shown in FIGS. 1-4, the drain pipe joint 10 includes a vertically tubular pipe body 12. In this embodiment, the drain pipe joint 10 is made of metal such as cast iron, and its surface (inner and outer surfaces) is coated with a coating such as epoxy resin powder.

[0021] At the upper end of the pipe body 12, a socket-shaped upper pipe connection portion 14 to which an upstream drain riser (upper riser) 100 is connected is formed. On the inner peripheral surface of the pipe body 12, an annular protrusion 16 having a substantially rectangular cross-section extending in the circumferential direction is formed at the base end portion of the upper pipe connection portion 14, and a rubber ring 18 along the inner peripheral surface of the upper pipe connection portion 14 is mounted on the annular protrusion 16. The inner diameter of the annular protrusion 16 of the pipe body 12 is set to be substantially the same as or slightly larger than the inner diameter of the drain riser 100.

[0022] At the lower end of the pipe body 12, a spigot-shaped lower pipe connection portion 20 to which a downstream drain riser (not shown) is connected is formed. The inner diameter of the lower pipe connection portion 20 is set to be substantially the same as or slightly smaller than the inner diameter of the drain riser 100. However, the lower pipe connection portion 20 may have a socket shape, and the drain riser connected to the lower pipe connection portion 20 may be a bend pipe or the like.

[0023] Furthermore, the pipe body 12 has an enlarged diameter section 22 below the upper pipe connection section 14, which is larger in diameter than other parts. Three horizontal pipe connection sections 24 are formed in this enlarged diameter section 22 of the pipe body 12 so as to be arranged circumferentially and branching out to the side. Each of the three horizontal pipe connection sections 24 has a socket shape, and a rubber ring 26 is fitted along the inner circumferential surface of each horizontal pipe connection section 24. In addition, rib-shaped backflow prevention plates 28 are formed on both sides of the base end opening of each horizontal pipe connection section 24 on the inner circumferential surface of the enlarged diameter section 22, extending along the axial direction (up and down direction) of the pipe body 12. These backflow prevention plates 28 prevent wastewater that has flowed into the pipe body 12 from the horizontal drain pipe 102 from flowing back into other horizontal drain pipes 102 via the horizontal pipe connection sections 24. However, the backflow prevention plates 28 are not necessarily required.

[0024] Furthermore, a swirling vane 30 is provided on the inner circumferential surface of the pipe body 12 below the horizontal pipe connection portion 24. The swirling vane 30 is formed in a substantially flat shape that extends diagonally with respect to the axial direction of the pipe body 12. Such a swirling vane 30 imparts a swirling force to the wastewater flowing down inside the pipe body 12, thereby generating a swirling flow and improving the drainage capacity.

[0025] Furthermore, a single flow deflection plate 32 is provided on the inner circumferential surface of the pipe body 12, extending circumferentially above the axial center of the horizontal pipe connection portion 24 (preferably above the horizontal pipe connection portion 24) and below the lower end of the drain riser pipe (upper riser pipe) 100 connected to the upper pipe connection portion 14. In this embodiment, the flow deflection plate 32 is formed to protrude from the inner circumferential surface of the annular projection portion 16. The flow deflection plate 32 deflects the wastewater flowing into the pipe body 12 from the drain riser pipe 100. The drainage capacity is improved by controlling and slowing down the flow. The configuration of the flow deflection plate 32 will be described in detail below.

[0026] Referring to Figures 2-4 and Figure 5, the drift plate 32 has a shape resembling the outer edge of a kagami mochi (rice cake offering). Specifically, the protruding end 32a of the drift plate 32 is formed as a convex curved surface that bulges towards the axial center of the pipe body 12 in a plan view, and its upper surface 32b is formed as a convex curved surface that becomes lower from the base end towards the protruding end 32a. In other words, the drift plate 32 has a rounded shape overall from the upper surface 32b to the protruding end 32a (side surface). More specifically, the protruding end 32a of the drift plate 32 is formed as a convex curved surface that is a circular arc with constant curvature in a plan view, and extends almost downward (approximately vertically) in a longitudinal cross-section. Also, as can be clearly seen from Figure 5(C), the upper surface 32b of the drift plate 32 is formed as a convex curved surface that is a circular arc with constant curvature in the longitudinal cross-section of the largest part of the drift plate 32 in the radial direction of the pipe body 12.

[0027] Furthermore, the lower surface 32c of the flow deflection plate 32 is formed in a substantially horizontal shape, and an edge portion (corner portion) 32d of a predetermined angle is formed around the boundary between the protruding end 32a of the flow deflection plate 32 and the lower surface 32c. The predetermined angle of the edge portion 32d is preferably 90 degrees or less, that is, a right angle or acute angle. Such an edge portion 32d acts as a drain portion, and by forming the edge portion 32d at a right angle or acute angle, it is prevented that the drainage received on the upper surface 32b of the flow deflection plate 32 flows around to the lower surface 32c, thereby allowing the drainage to be appropriately deflected.

[0028] The circumferential position where the drift plate 32 is formed is not particularly limited as long as it is offset from the swirl vane 30, that is, not directly above the swirl vane 30, but it is preferable to form it at a position offset to the side of the upper end of the swirl vane 30 in a plan view. By forming the drift plate 32 at a position offset to the side of the upper end of the swirl vane 30, the direction in which the drift plate 32 deflects the drainage and the direction in which the swirl vane 30 swirls the drainage will generally coincide, thereby enabling the generation of a more appropriate swirling flow.

[0029] The size of the flow deflection plate 32 can be changed as appropriate, but the protrusion length X of the maximum portion of the flow deflection plate 32 in the radial direction of the pipe body 12 is preferably smaller than the width Y of the maximum portion of the flow deflection plate 32 in the direction perpendicular to the radial direction of the pipe body 12, and more preferably less than half of the width Y. Among these, the protrusion length X is preferably 5 mm or more and 25 mm or less, and the width Y is preferably 10 mm or more and 85 mm or less. In addition, the thickness Z of the maximum portion of the flow deflection plate 32 in the axial direction of the pipe body 12 is preferably about the same as the protrusion length X. If the flow deflection plate 32 is too small, it will not be able to properly deflect the drainage, and if the flow deflection plate 32 is too large, the cross-sectional area of ​​the flow path of the pipe body 12 will become too small, which may reduce the drainage capacity. In this embodiment, the protrusion length X of the flow deflection plate 32 is 12 mm, the width Y is 50 mm, and the thickness Z is 12 mm.

[0030] In a drain pipe joint 10 equipped with such a flow deflection plate 32, the wastewater flowing into the pipe body 12 from the upstream drain riser pipe 100 is deflected by the flow deflection plate 32. As described above, the flow deflection plate 32 in this embodiment has a rounded shape from the upper surface 32b to the protruding end 32a, so as shown in Figure 6, the deflected wastewater flows in a smooth, rounded manner. Smoothly flowing wastewater is less likely to have sharp edges, and the generation of bubbles is suppressed. Therefore, it is possible to prevent blockage inside the pipe body 12 and the drain riser pipe 100, and to prevent problems such as splashing of the water seal. In addition, compared to the case where the wastewater is deflected in a straight line, the film of wastewater is thinner due to the rounded shape, so air can circulate more easily up and down inside the pipe body 12, which is suitable for maximizing drainage capacity.

[0031] Furthermore, since the protruding end 32a of the flow deflection plate 32 extends substantially vertically in the longitudinal cross-section, the drainage received at the upper surface 32b flows along the protruding end 32a and is guided downward. Therefore, The flow deflection plate 32 prevents the wastewater, which has been deflected, from entering the horizontal pipe connection section 24.

[0032] Furthermore, since the flow deflection plate 32 has a shape in which the central part bulges toward the axial center of the pipe body 12 when viewed from above, it is possible to deflect wastewater flowing at a position away from the inner circumferential surface of the pipe body 12 without making the flow deflection plate 32 too large. If the flow deflection plate 32 becomes too large, the cross-sectional area of ​​the flow path of the pipe body 12 will decrease, making it difficult for air to flow vertically, but by making the flow deflection plate 32 bulge in the center when viewed from above, this problem is prevented and the drainage capacity is not hindered.

[0033] As described above, in this embodiment, the protruding end 32a of the flow deflection plate 32 is formed in a convex curved shape that bulges in the center when viewed from above, and its upper surface 32b is formed in a convex curved shape that becomes lower towards the protruding end 32a. As a result, the flow of wastewater deflected by the flow deflection plate 32 becomes smooth with a rounded, spreading shape. This suppresses the generation of bubbles and thins the wastewater film, making it easier for air to circulate vertically within the pipe body 12, thereby improving the drainage performance of the drain pipe joint 10. Therefore, a drain pipe joint 10 with excellent drainage performance can be provided.

[0034] In the above-described embodiment, the drain pipe fitting 10 was made of metal such as cast iron, but the drain pipe fitting 10 can also be made of synthetic resin such as rigid polyvinyl chloride. Furthermore, the drain pipe fitting 10 can be constructed by combining multiple components. Figure 7 shows an example of a drain pipe fitting 10 made of synthetic resin. Even with a drain pipe fitting 10 made of synthetic resin, the basic structure is the same as that of the metal one, so the same reference numerals are used for similar parts, and redundant explanations are omitted.

[0035] Furthermore, as shown in Figures 7 and 8, a material-removing portion (recess) 32e can be formed on the lower surface 32c of the flow deflection plate 32. By having a material-removing portion 32e on the lower surface 32c of the flow deflection plate 32, the amount of material used can be reduced, shrinkage during manufacturing can be prevented, and drainage can be more reliably prevented from flowing back onto the lower surface 32c.

[0036] Furthermore, in the above-described embodiment, the drain pipe joint 10 is provided with three horizontal pipe connection sections 24 arranged in the circumferential direction, but the number of horizontal pipe connection sections 24 is not particularly limited and may be one or two, etc. Also, when multiple horizontal pipe connection sections 24 are provided, they do not necessarily have to be placed at the same height position, and the horizontal pipe connection sections 24 may be placed at different height positions. When the horizontal pipe connection sections 24 are placed at different height positions, the flow deflector 32 is placed above the axial center of the uppermost horizontal pipe connection section 24, and preferably above the uppermost horizontal pipe connection section 24.

[0037] Furthermore, in the above-described embodiment, one swivel blade 30 and one drift plate 32 were provided, but two or more swivel blades 30 or two or more drift plates 32 can also be provided.

[0038] Please note that the specific dimensions and shapes mentioned above are merely examples and can be modified as needed according to product specifications and other requirements. [Explanation of Symbols]

[0039] 10 ... Drain pipe fittings 12 ... pipe body 14 ... Upper pipe connection 20 ... Lower pipe connection 24 ... Horizontal pipe connection 30... Swivel blades 32 …straight plate 32a ... Protruding end of the drift plate 32b ... Upper surface of the drift plate 32c ... Underside of the drift plate 32d ... Edge of the drift plate 32e... Part of the drift plate that steals material 100 ... Drain riser 102…Drain horizontal pipe

Claims

1. A drain pipe joint comprising a vertical cylindrical pipe body having an upper pipe connection portion formed at the upper end and a lower pipe connection portion formed at the lower end, and a horizontal pipe connection portion branching laterally from the pipe body, wherein a bend pipe is connected to the lower pipe connection portion, The pipe body is equipped with a plurality of flow deflection plates that protrude from the inner circumferential surface, The flow deflector is positioned above the axial center of the horizontal pipe connection and below the lower end of the upper vertical pipe connected to the upper pipe connection. The aforementioned flow deflection plate has a shape that bulges toward the axial center of the pipe body when viewed in plan, The upper surface of the aforementioned flow deflection plate is formed in a convex shape, with the highest point being at the base center and decreasing towards the protruding end. An edge portion at a predetermined angle is formed at the periphery of the boundary between the protruding end and the lower surface of the deflection plate. The predetermined angle of the edge portion is a right angle or an acute angle. The drain pipe fitting is made of synthetic resin and is constructed by combining multiple components (except in cases where the lower end of the cylindrical portion on which the flow deflection plate is formed hangs down below the upper edge of the base end opening of the horizontal pipe connection portion).

2. A drain pipe joint comprising a vertical cylindrical pipe body having an upper pipe connection portion formed at the upper end and a lower pipe connection portion formed at the lower end, and a horizontal pipe connection portion branching laterally from the pipe body, wherein a bend pipe is connected to the lower pipe connection portion, The pipe body is equipped with a plurality of flow deflection plates that protrude from the inner circumferential surface, The flow deflector is positioned above the axial center of the horizontal pipe connection and below the lower end of the upper vertical pipe connected to the upper pipe connection. The aforementioned flow deflection plate has a shape that bulges toward the axial center of the pipe body when viewed in plan, The upper surface of the deflection plate is formed in a convex shape, with the highest point being at the base center and decreasing towards the protruding end, and the longitudinal cross-section of the largest portion of the deflection plate in the radial direction of the pipe body has a convex curve. An edge portion at a predetermined angle is formed at the periphery of the boundary between the protruding end and the lower surface of the deflection plate. The predetermined angle of the edge portion is a right angle or an acute angle. The drain pipe fitting is made of synthetic resin and is constructed by combining multiple components (except in cases where the lower end of the cylindrical portion on which the flow deflection plate is formed hangs down below the upper edge of the base end opening of the horizontal pipe connection portion).

3. The drain pipe joint according to claim 1 or 2, wherein the lower surface of the flow deflection plate is formed in a substantially horizontal plane.

4. The drain pipe joint according to any one of claims 1 to 3, wherein the protruding length of the maximum portion of the flow deflection plate in the radial direction of the pipe body is smaller than the width of the maximum portion of the flow deflection plate in a direction perpendicular to the radial direction of the pipe body.

5. The drain pipe fitting according to any one of claims 1 to 4, wherein the protruding length of the maximum portion of the flow deflection plate in the radial direction of the pipe body is 5 mm or more and 25 mm or less.

6. The drain pipe fitting according to any one of claims 1 to 5, wherein the width of the widest part of the flow deflection plate in a direction perpendicular to the radial direction of the pipe body is 10 mm or more and 85 mm or less.

7. A single swirling vane is formed on the inner circumferential surface of the pipe body at a position below the flow deflection plate, The drain pipe joint according to any one of claims 1 to 6, wherein the flow deflection plate is positioned at a circumferential position offset from the swivel vane in a plan view.

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