JP2020147903A - Drain pipe joint - Google Patents

Abstract

To provide a drain pipe joint excellent in drainage performance.SOLUTION: A drain pipe joint 10 has a vertical cylindrical pipe body having an upper pipe connection part 14 and a lower pipe connection part 20, and a horizontal pipe connection part 24 branched sideward from the pipe body. A deflection plate 32 extended along the circumferential direction is formed on an inner peripheral surface of the pipe body. A projection end of the deflection plate is formed in a convex surface shape expanded at a central part in plan view, and an upper surface of the deflection plate is formed in a convex surface shape lowered toward the projection end. An edge part of a predetermined angle is formed on a boundary circumference between the projection end and a lower surface of the deflection plate.SELECTED DRAWING: Figure 4

Description

The present invention relates to a drainage pipe joint, and more particularly to a drainage pipe joint provided at a confluence of a drainage stand pipe and a drainage lateral branch pipe.

An example of a conventional drainage pipe joint is disclosed in Patent Document 1. The drainage collecting pipe (drainage pipe joint) of Patent Document 1 has a vertical connection port (upper pipe connection part and lower pipe connection part) for connecting a vertical drainage pipe to the upper and lower ends of a tubular body (pipe body). , It has a horizontal connection port (horizontal pipe connection part) for connecting a horizontal branch pipe to the peripheral wall of the tubular body. In addition, inside the tubular body, a drift plate provided at an angle with respect to the vertical pipe axis to bias the drainage flow flowing down from the vertical drainage pipe to one side, and a drainage flow below the drift plate. It has a swivel blade provided to give swivel.

Japanese Unexamined Patent Publication No. 2006-37371

In the technique of Patent Document 1, since the drift plate is formed in a flat plate shape inclined with respect to the vertical pipe axis, the drainage is linearly drifted by the drift plate. However, if the drifted drainage flows linearly, the drainage tends to flow into the horizontal pipe connection portion on the opposite side of the drift plate. In addition, if a baffle plate is installed to prevent the inflow of drainage to the horizontal pipe connection portion, the drainage vigorously collides with the baffle plate and turbulence is generated there. Then, the washing drainage or the like may foam, the inside of the drainage pipe may be blocked, and troubles such as splashing of the sealed water may occur. Therefore, a drainage pipe joint with further improved drainage performance is desired.

Therefore, the main object of the present invention is to provide a novel drainage pipe joint.

Another object of the present invention is to provide a drainage pipe joint having excellent drainage performance.

The first invention is a vertical tubular pipe body having an upper pipe connecting portion formed at the upper end portion and a lower pipe connecting portion formed at the lower end portion, and a horizontal pipe connecting portion branching laterally from the pipe main body. It is a drainage pipe joint including, and includes a drift plate protruding from the inner peripheral surface of the pipe body and extending along the circumferential direction, and the drift plate is above the axial center of the horizontal pipe connection portion and is an upper pipe. It is arranged below the lower end of the upper stand pipe connected to the connection part, and the protruding end of the drift plate is formed in a convex curved shape with the central part bulging in a plan view, and the upper surface of the drift plate increases toward the protruding end. It is a drainage pipe joint that is formed in a convex curved shape that becomes lower, and an edge portion at a predetermined angle is formed at the boundary peripheral edge between the protruding end and the lower surface of the drift plate.

In the first invention, the drainage pipe joint includes a vertical tubular pipe main body having an upper pipe connecting portion and a lower pipe connecting portion, and a horizontal pipe connecting portion that branches laterally from the pipe main body. On the inner peripheral surface of the pipe body, a drift plate extending along the circumferential direction above the axial center of the horizontal pipe connecting portion and below the lower end of the upper standing pipe connected to the upper pipe connecting portion. Is provided. The drift plate is formed in a convex curved surface shape in which the protruding end is bulged in the central portion in a plan view and the upper surface is lowered toward the protruding end. That is, the drift plate has a rounded shape as a whole from the upper surface to the protruding end. Further, an edge portion having a predetermined angle is formed on the boundary peripheral edge between the protruding end of the drift plate and the lower surface.

According to the first invention, the flow of the wastewater drifted by the drift plate becomes round and smooth. As a result, the generation of bubbles is suppressed, the drainage film becomes thin, and air easily flows up and down in the pipe body, so that the drainage performance of the drainage pipe joint can be improved. Therefore, it is possible to provide a drainage pipe joint having excellent drainage performance.

The second invention is dependent on the first invention, and the predetermined angle of the edge portion is a right angle or an acute angle.

In the second invention, the predetermined angle of the edge portion is set to 90 degrees or less. As a result, the drainage is prevented from wrapping around the lower surface of the drift plate, and the drainage can be more appropriately drifted.

The third invention is dependent on the first or second invention, and the lower surface of the drift plate is formed in a substantially horizontal plane.

The fourth invention is subordinate to any one of the first to third inventions, and the drift plate has a meat stealing portion formed on the lower surface.

Also in the third and fourth inventions, the drainage is prevented from wrapping around the lower surface of the drift plate, and the drainage can be more appropriately drifted.

The fifth invention is dependent on any one of the first to fourth inventions, the protruding end of the drift plate is formed in a convex curved surface shape which is an arc having a constant curvature, and the upper surface of the drift plate is the pipe body. In the vertical cross section of the maximum portion of the drift plate in the radial direction, it is formed in a convex curved surface shape which is an arc having a constant curvature.

The sixth invention is subordinate to any one of the first to fifth inventions, and includes a swivel blade formed on the inner peripheral surface of the pipe body below the horizontal pipe connection portion, and the drift plate and the swivel blade are , Arranged with a shift in the circumferential position.

The seventh invention is dependent on any one of the first to sixth inventions, and the protrusion length of the maximum portion of the drift plate in the radial direction of the pipe body is the protrusion length of the drift plate in the direction orthogonal to the radial direction of the pipe body. It is smaller than the width of the maximum part.

The eighth invention is dependent on the seventh invention, and the protrusion length of the maximum portion of the drift plate in the radial direction of the pipe body is 5 mm or more and 25 mm or less, and the drift plate in the direction orthogonal to the radial direction of the pipe body. The width of the maximum portion of is 10 mm or more and 85 mm or less.

According to the eighth invention, the drainage can be appropriately drifted by the drift plate without the flow path cross section of the pipe body becoming too small.

According to the present invention, the flow of the wastewater drifted by the drift plate becomes round, wide and smooth. As a result, the generation of bubbles is suppressed, the drainage film becomes thin, and air easily flows up and down in the pipe body, so that the drainage performance of the drainage pipe joint can be improved. Therefore, it is possible to provide a drainage pipe joint having excellent drainage performance.

The above-mentioned object, other object, feature and advantage of the present invention will become more apparent from the detailed description of the examples described below with reference to the drawings.

It is a front view which shows the drainage pipe joint which is one Example of this invention. It is a top view which shows the drainage pipe joint of FIG. It is a 1st vertical cross-sectional view which shows the vertical cross section of the drainage pipe joint cut by the line III-III of FIG. It is a 2nd vertical cross-sectional view which shows the vertical cross section of the drainage pipe joint cut by the IV-IV line of FIG. (A) is a plan view showing a drift plate provided in the drainage pipe joint of FIG. 1, (B) is a front view showing a drift plate, and (C) is V (C) -V (C) of (B). It is a vertical cross-sectional view which shows the vertical cross section of the drift plate cut by the) line. It is a schematic diagram which shows typically the flow of the drainage which was drifted by the drift plate. It is a vertical cross-sectional view which shows the drainage pipe joint which is another Example of this invention. FIG. 5 is a vertical cross-sectional view showing a vertical cross section of a portion around a drift plate of the drainage pipe joint of FIG. 7.

With reference to FIGS. 1 and 2, the drainage pipe joint 10 according to an embodiment of the present invention is located at the confluence of the drainage vertical pipe 100 and the drainage horizontal pipe 102 in a multi-story building such as an apartment or a commercial building. It is a collecting pipe joint provided. In this embodiment, a drainage pipe joint 10 for merging three drainage horizontal pipes 102 having an inner diameter of 75 mm with a drainage vertical pipe 100 having an inner diameter of 100 mm will be described as an example. As will be described in detail later, the drainage pipe joint 10 has a swivel blade 30 and a drift plate 32 on the inner peripheral surface of the pipe body 12, and is strong by swirling the drainage drifted by the drift plate 32 with the swivel blade 30. It generates a swirling flow and demonstrates drainage capacity that can handle high-rise buildings.

As shown in FIGS. 1 to 4, the drainage pipe joint 10 includes a vertically tubular pipe body 12. In this embodiment, the drainage pipe joint 10 is made of a metal such as cast iron, and its surface (inner surface and outer surface) is coated with epoxy resin powder or the like.

At the upper end of the pipe body 12, a socket-shaped upper pipe connecting portion 14 to which the drainage standing pipe (upper standing pipe) 100 on the upstream side is connected is formed. An annular protrusion 16 having a substantially rectangular cross section extending in the circumferential direction is formed on the inner peripheral surface of the pipe body 12 at the base end portion of the upper pipe connecting portion 14, and the upper pipe is formed on the annular protrusion 16. A rubber ring 18 is mounted along the inner peripheral surface of the connecting portion 14. 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 drainage stand 100.

At the lower end of the pipe body 12, a lower pipe connecting portion 20 having a outlet shape is formed to which a drainage stand pipe (not shown) on the downstream side is connected. The inner diameter of the lower pipe connecting portion 20 is set to be substantially the same as or slightly smaller than the inner diameter of the drainage stand pipe 100. However, the lower pipe connecting portion 20 may have a receiving port shape, and the drainage stand pipe connected to the lower pipe connecting portion 20 may be a bend pipe or the like.

Further, the pipe body 12 has a diameter-expanded portion 22 having a diameter larger than that of other portions on the lower side of the upper pipe connecting portion 14. The diameter-expanded portion 22 of the pipe body 12 is formed so that three lateral pipe connecting portions 24 branching laterally are arranged in the circumferential direction. Each of the three horizontal pipe connecting portions 24 has a socket shape, and a rubber ring 26 is attached to each horizontal pipe connecting portion 24 along the inner peripheral surface. Further, on the inner peripheral surface of the enlarged diameter portion 22, rib-shaped backflow prevention plates 28 extending along the axial direction (vertical direction) of the pipe body 12 are provided on both sides of the opening on the proximal end side of each horizontal pipe connecting portion 24. It is formed. The backflow prevention plate 28 prevents the drainage flowing from the drainage horizontal pipe 102 into the pipe main body 12 from flowing back to another drainage horizontal pipe 102 via the horizontal pipe connecting portion 24. However, the backflow prevention plate 28 does not necessarily have to be provided.

Further, one swivel blade 30 is provided on the inner peripheral surface of the pipe body 12 below the horizontal pipe connecting portion 24. The swivel blade 30 is formed in a substantially flat plate shape extending obliquely in the axial direction of the pipe body 12. Such a swirling blade 30 applies a swirling force to the drainage flowing down in the pipe body 12 to generate a swirling flow, thereby improving the drainage capacity.

Furthermore, the inner peripheral surface of the pipe body 12 is above the axial center of the horizontal pipe connecting portion 24 (preferably above the horizontal pipe connecting portion 24) and is connected to the upper pipe connecting portion 14. Below the lower end of the drainage stand pipe (upper stand pipe) 100, one drift plate 32 extending along the circumferential direction is provided. In this embodiment, the drift plate 32 is formed so as to project from the inner peripheral surface of the annular protrusion 16. The drift plate 32 improves the drainage capacity by drifting and decelerating the drainage that has flowed into the pipe body 12 from the drainage stand 100. Hereinafter, the configuration of the drift plate 32 will be specifically described.

With reference to FIG. 5 together with FIG. 2-FIG. 4, the drift plate 32 has a shape as if the outer edge of the kagami mochi was cut off. Specifically, the protruding end 32a of the drift plate 32 is formed in a convex curved surface shape whose central portion bulges toward the axial center of the pipe body 12 in a plan view, and its upper surface 32b is directed from the base end toward the protruding end 32a. It is formed in a convex curved surface that becomes lower as it increases. That is, the drift plate 32 has a rounded shape as a whole 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 in a convex curved surface shape which is an arc having a constant curvature in a plan view, and extends substantially downward (substantially in the vertical direction) in the vertical cross section. Further, as can be clearly seen from FIG. 5C, the upper surface 32b of the drift plate 32 has a convex curved surface shape which is an arc having a constant curvature in the vertical cross section of the maximum portion of the drift plate 32 in the radial direction of the pipe body 12. It is formed.

Further, the lower surface 32c of the drift plate 32 is formed in a substantially horizontal plane shape, and an edge portion (corner portion) 32d at a predetermined angle is formed on the boundary peripheral edge between the protruding end 32a and the lower surface 32c of the drift plate 32. The predetermined angle of the edge portion 32d is preferably 90 degrees or less, that is, a right angle or an acute angle. Such an edge portion 32d acts as a draining portion, and by forming the edge portion 32d at a right angle or an acute angle, it is possible to prevent the drainage received by the upper surface 32b of the drift plate 32 from wrapping around the lower surface 32c. The drainage can be properly drifted.

The circumferential position of the drift plate 32 is not particularly limited as long as it is deviated from the swirl vane 30, that is, other than directly above the swirl vane 30, but the side of the swirl vane 30 on the upper end side in a plan view It is preferable to form the position shifted to the direction. By forming the drift plate 32 at a position shifted to the upper end side of the swivel blade 30, the direction in which the drainage is drifted by the drift plate 32 and the direction in which the drainage is swirled by the swivel blade 30 are substantially the same. Therefore, the swirling flow can be generated more appropriately.

The size of the drift plate 32 can be changed as appropriate, but the protrusion length X of the maximum portion of the drift plate 32 in the radial direction of the pipe body 12 is the maximum of the drift plate 32 in the direction orthogonal to the radial direction of the pipe body 12. It is preferably smaller than the width Y of the portion, and more preferably less than half the width Y. Among them, 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. Further, it is preferable that the thickness Z of the maximum portion of the drift plate 32 in the axial direction of the pipe body 12 is about the same as the protrusion length X. If the drift plate 32 is too small, drainage cannot be properly flowed, and if the drift plate 32 is too large, the cross section of the flow path of the pipe body 12 may become too small and the drainage capacity may decrease. is there. In this embodiment, the projecting length X of the drift plate 32 is 12 mm, the width Y is 50 mm, and the thickness Z is 12 mm.

In the drainage pipe joint 10 provided with such a drift plate 32, the drainage flowing into the pipe body 12 from the drainage stand pipe 100 on the upstream side is drifted by the drift plate 32. As described above, the drift plate 32 of this embodiment has a rounded shape as a whole from the upper surface 32b to the protruding end 32a. Therefore, as shown in FIG. 6, the flow of the drainage that has been drifted is different. It becomes smooth with a rounded spread. The drainage that flows smoothly is hard to make corners and the generation of bubbles is suppressed. Therefore, it is possible to prevent the inside of the pipe body 12 and the drainage stand pipe 100 from being blocked, and it is possible to prevent the occurrence of troubles such as splashing of sealed water. Further, as compared with the case of linearly drifting, the drainage film becomes thinner by the amount of the rounded spread, so that the air easily flows up and down in the pipe body 12, which is suitable for exerting the drainage capacity. ..

Further, since the protruding end 32a of the drift plate 32 extends in the substantially vertical direction in the vertical cross section, the drainage received on the upper surface 32b flows along the protruding end 32a and is guided downward. Therefore, it is possible to prevent the drainage that has been drifted by the drift plate 32 from entering the horizontal pipe connecting portion 24.

Further, since the drift plate 32 has a shape in which the central portion bulges toward the axial center of the pipe body 12 in a plan view, the drift plate 32 is separated from the inner peripheral surface of the pipe body 12 without making the flow plate 32 too large. The drainage flowing at the above position can also be drifted. If the drift plate 32 becomes too large, the cross-sectional area of the flow path of the pipe body 12 becomes small and it becomes difficult for air to flow up and down. However, this problem is caused by the shape of the drift plate 32 in which the central portion swells in a plan view. Is prevented and the drainage capacity is not impaired.

As described above, according to this embodiment, the protruding end 32a of the drift plate 32 is formed into a convex curved surface whose central portion bulges in a plan view, and the upper surface 32b thereof is formed into a convex curved surface that becomes lower toward the protruding end 32a. Since it is formed, the flow of the wastewater that has been drifted by the drift plate 32 becomes round and smooth. As a result, the generation of bubbles is suppressed, the drainage film becomes thin, and air easily flows up and down in the pipe body 12, so that the drainage performance of the drainage pipe joint 10 can be improved. Therefore, it is possible to provide a drainage pipe joint 10 having excellent drainage performance.

In the above-described embodiment, the drainage pipe joint 10 is made of a metal such as cast iron, but the drainage pipe joint 10 can also be formed of a synthetic resin such as hard vinyl chloride. Further, the drainage pipe joint 10 can be formed by combining a plurality of members. FIG. 7 shows an example of a drainage pipe joint 10 made of synthetic resin. Even if the drainage pipe joint 10 is made of synthetic resin, the basic configuration is the same as that made of metal. Therefore, the same reference numbers are given to the same parts, and duplicate description is omitted.

Further, as shown in FIGS. 7 and 8, a meat stealing portion (recessed portion) 32e can be formed on the lower surface 32c of the drift plate 32. By having the meat stealing portion 32e on the lower surface 32c of the drift plate 32, it is possible to reduce the amount of material, prevent sink marks during manufacturing, and more reliably prevent drainage from wrapping around the lower surface 32c.

Further, in the above-described embodiment, the drainage pipe joint 10 is provided with three horizontal pipe connecting portions 24 arranged in the circumferential direction, but the number of horizontal pipe connecting portions 24 is not particularly limited, and one or two. Etc. are fine. Further, when a plurality of horizontal pipe connecting portions 24 are provided, it is not always necessary to arrange them at the same height position, and the horizontal pipe connecting portions 24 may be arranged at different height positions. When the horizontal pipe connecting portions 24 are arranged at different height positions, the drift plate 32 is arranged above the axial center of the uppermost horizontal pipe connecting portion 24, preferably the uppermost horizontal pipe connecting portion 24. It is arranged above the pipe connecting portion 24.

Further, in the above-described embodiment, one swivel blade 30 and one drift plate 32 are provided, but two or more swivel blades 30 may be provided, or two or more drift plates 32 may be provided.

The specific numerical values such as the dimensions and the specific shapes mentioned above are merely examples, and can be appropriately changed as necessary such as product specifications.

10 ... Drainage pipe joint 12 ... Pipe body 14 ... Upper pipe connection part 20 ... Lower pipe connection part 24 ... Horizontal pipe connection part 30 ... Swivel blade 32 ... Swivel plate 32a ... Protruding end of drift plate 32b ... Top surface of drift plate 32c ... Lower surface of the drift plate 32d ... Edge of the drift plate 32e ... Meat stealing part of the drift plate 100 ... Drainage vertical pipe 102 ... Drainage horizontal pipe

Claims (8)

A drainage pipe joint including a vertical tubular pipe body having an upper pipe connecting portion formed at the upper end portion and a lower pipe connecting portion formed at the lower end portion, and a horizontal pipe connecting portion branching laterally from the pipe body. And
A drift plate that protrudes from the inner peripheral surface of the pipe body and extends along the circumferential direction is provided.
The drift plate is arranged above the axial center of the horizontal pipe connecting portion and below the lower end of the upper vertical pipe connected to the upper pipe connecting portion.
The protruding end of the drift plate is formed in a convex curved surface shape in which the central portion bulges in a plan view.
The upper surface of the drift plate is formed in a convex curved surface shape that becomes lower toward the protruding end.
A drainage pipe joint in which an edge portion having a predetermined angle is formed on the boundary peripheral edge between the protruding end and the lower surface of the drift plate. The drainage pipe joint according to claim 1, wherein the predetermined angle of the edge portion is a right angle or an acute angle. The drainage pipe joint according to claim 1 or 2, wherein the lower surface of the drift plate is formed in a substantially horizontal plane. The drainage pipe joint according to any one of claims 1 to 3, wherein the drift plate has a meat stealing portion formed on the lower surface. The protruding end of the drift plate is formed in a convex curved surface shape which is an arc having a constant curvature.
4. Drainage pipe fittings. A swivel blade formed on the inner peripheral surface of the pipe body below the horizontal pipe connection portion is provided.
The drainage pipe joint according to any one of claims 1 to 5, wherein the drift plate and the swivel blade are arranged so as to be displaced in the circumferential direction. Any of claims 1 to 6, wherein the protruding length of the maximum portion of the drift plate in the radial direction of the pipe body is smaller than the width of the maximum portion of the drift plate in the direction orthogonal to the radial direction of the pipe body. Drainage pipe fittings described in. The protrusion length of the maximum portion of the drift plate in the radial direction of the pipe body is 5 mm or more and 25 mm or less.
The drainage pipe joint according to claim 7, wherein the width of the maximum portion of the drift plate in a direction orthogonal to the radial direction of the pipe body is 10 mm or more and 85 mm or less.

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