JP7204541B2 - drain pipe fittings - Google Patents

Description

TECHNICAL FIELD The present invention relates to a drain pipe joint, and more particularly to a drain pipe joint provided, for example, at the confluence of a drainage stack and a drainage horizontal branch pipe.

An example of a conventional drain pipe joint is disclosed in Patent Document 1. The drainage collection pipe (drainage pipe joint) of Patent Document 1 has vertical connection ports (upper pipe connection and lower pipe connection) that connect vertical drainage pipes to the upper and lower ends of a cylindrical body (pipe body). , and a lateral connection port (horizontal pipe connection portion) for connecting a lateral branch pipe to the peripheral wall of the cylindrical body. In addition, inside the cylindrical body, a drift plate is provided at an angle with respect to the vertical pipe axis in order to bias the drainage flow flowing down from the vertical drainage pipe to one side, and below the drift plate, the drainage flow and swirl vanes provided to impart swirl.

JP-A-2006-37371

In the technique disclosed in Patent Document 1, the non-uniform flow plate is formed in the shape of a flat plate that is inclined with respect to the axis of the vertical pipe, so that the waste water is linearly non-uniformly flowed by the non-uniform flow plate. However, if the deflected waste water flows linearly, the waste water tends to flow into the horizontal pipe connecting portion on the opposite side of the deflecting plate. In addition, when a baffle plate is installed to prevent the inflow of waste water into the horizontal pipe joint, the waste water collides with the baffle plate with force and causes turbulence there. As a result, there is a risk that the washing water will foam up and the inside of the drain pipe will be clogged, causing troubles such as splashing of the sealed water. Therefore, a drain pipe joint with improved drainage performance is desired.

SUMMARY OF THE INVENTION Therefore, it is a primary object of the present invention to provide a novel drain pipe fitting.

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

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

In the first invention, a drain 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 branching laterally from the pipe main body. On the inner peripheral surface of the pipe body, a drift plate extending along the circumferential direction is provided 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. is provided. The deflecting plate has a protruding end formed in a convex curved shape in which the central portion swells in a plan view, and an upper surface formed in a convex curved shape in which the surface becomes lower toward the protruding end. That is, the deflection plate has an overall rounded shape from the top surface to the projecting end. Further, an edge portion with a predetermined angle is formed on the boundary peripheral edge between the projecting end and the lower surface of the deflection plate.

According to the first aspect of the invention, the flow of the waste water that is deflected by the deflection plate becomes smooth with a round spread. As a result, the generation of bubbles is suppressed, and the film of the drainage becomes thin, making it easier for the air to flow vertically 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.

A second invention is according to the first invention, wherein 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 waste water is prevented from flowing around the lower surface of the deflection plate, and the waste water can be deflected more appropriately.

A third invention is according to the first or second invention, and the bottom surface of the deflection plate is formed in a substantially horizontal plane.

A fourth invention is according to any one of the first to third inventions, wherein the deflection plate has a recessed portion formed on the lower surface.

Also in the third and fourth inventions, it is possible to prevent the waste water from flowing around the lower surface of the deflection plate, and to more appropriately divert the waste water.

A fifth invention is according to any one of the first to fourth inventions, wherein the protruding end of the deflection plate is formed in a convex curved surface shape having a constant curvature, and the upper surface of the deflection plate extends from the pipe body. In the vertical cross section of the maximum portion of the deflector plate in the radial direction, it is formed into a convex curved surface that is an arc with a constant curvature.

A sixth invention is according to any one of the first to fifth inventions, and includes a swirl vane formed on the inner peripheral surface of the pipe body below the horizontal pipe connecting portion, wherein the deflection plate and the swirl vane are , are displaced in the circumferential direction.

A seventh invention is according to any one of the first to sixth inventions, wherein the projection length of the maximum portion of the deflection plate in the radial direction of the pipe body is the length of the deflection plate in a direction orthogonal to the radial direction of the pipe body. less than the width of the widest part.

An eighth invention is according to the seventh invention, wherein the projection length of the maximum portion of the deflection plate in the radial direction of the pipe body is 5 mm or more and 25 mm or less, and the deflection plate in a 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 flow channel cross-sectional area of the pipe body does not become too small, and the deflection plate can appropriately deflect the waste water.

According to this invention, the flow of the waste water that is deflected by the deflection plate becomes smooth with a round spread. As a result, the generation of bubbles is suppressed, and the film of the drainage becomes thin, making it easier for the air to flow vertically 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 object, other objects, features and advantages of the present invention will become more apparent from the detailed description of embodiments given below with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the drain pipe joint which is one Example of this invention. FIG. 2 is a plan view showing the drain pipe joint of FIG. 1; FIG. 3 is a first longitudinal sectional view showing a longitudinal section of the drain pipe joint cut along line III-III in FIG. 2; 3 is a second longitudinal sectional view showing a longitudinal section of the drain pipe joint cut along line IV-IV of FIG. 2; FIG. (A) is a plan view showing a non-uniform flow plate provided in the drain pipe joint of FIG. 1, (B) is a front view showing the non-uniform flow plate, and (C) is V(C)-V(C ) is a vertical cross-sectional view showing a vertical cross-section of the deflection plate cut along line ). It is an illustration figure which shows typically the flow of the waste_water|drain which was made to flow by the deflection plate. FIG. 5 is a vertical cross-sectional view showing a drain pipe joint that is another embodiment of the present invention; FIG. 8 is a vertical cross-sectional view showing a vertical cross-section of the portion around the non-uniform flow plate of the drain pipe joint of FIG. 7 ;

1 and 2, a drain pipe joint 10, which is one embodiment of the present invention, is provided at the confluence of a drain stack 100 and a horizontal drain pipe 102 in multi-story buildings such as condominiums and commercial buildings. It is a collection pipe joint provided. In this embodiment, a drainage pipe joint 10 for joining three drainage horizontal pipes 102 with an inner diameter of 75 mm to a drainage stack 100 with an inner diameter of 100 mm will be described as an example. As will be described later in detail, the drain pipe joint 10 has a swirl vane 30 and a non-uniform flow plate 32 on the inner peripheral surface of the pipe body 12. It generates a swirling flow and demonstrates drainage capacity that can be used in high-rise buildings.

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

At the upper end of the pipe main body 12, a receptacle-shaped upper pipe connecting portion 14 to which an upstream drainage stack (upper stack) 100 is connected is formed. An annular projection 16 having a substantially rectangular cross section extending in the circumferential direction is formed on the inner peripheral surface of the pipe main body 12 at the proximal end portion of the upper pipe connecting portion 14 . A rubber ring 18 is attached 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 stack 100 .

A spigot-shaped lower pipe connection portion 20 to which a drainage stack (not shown) on the downstream side is connected is formed at the lower end portion of the pipe main body 12 . 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 stack 100 . However, the lower pipe connection portion 20 may have a socket shape, and the drainage stack connected to the lower pipe connection portion 20 may be a bend pipe or the like.

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

Furthermore, one swirl vane 30 is provided on the inner peripheral surface of the pipe main body 12 below the horizontal pipe connecting portion 24 . The swirl vane 30 is formed in a substantially flat plate shape extending obliquely with respect to the axial direction of the pipe body 12 . Such a swirl vane 30 imparts a swirl force to the waste water flowing down inside the pipe body 12 to generate a swirl flow, thereby improving the drainage performance.

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

Referring to FIG. 5 together with FIGS. 2 to 4, the deflection plate 32 has a shape as if the outer edge of a rice cake was cut off. Specifically, the protruding end 32a of the deflection plate 32 is formed in a convex curved surface shape in which the central portion swells toward the axial center of the pipe body 12 in a plan view, and the upper surface 32b extends from the base end toward the protruding end 32a. It is formed in a convex curved shape that becomes lower as follows. That is, the deflection plate 32 has an overall rounded shape from the upper surface 32b to the projecting end 32a (side surface). More specifically, the protruding end 32a of the deflection plate 32 is formed in a convex curved surface shape that is an arc with a constant curvature in a plan view, and extends substantially downward (substantially vertically) in a longitudinal section. As can be clearly seen from FIG. 5C, the upper surface 32b of the flow deflection plate 32 has a convex curved surface that is an arc with a constant curvature in the longitudinal section of the maximum portion of the flow deflection plate 32 in the radial direction of the pipe body 12. It is formed.

Further, the bottom surface 32c of the flow deflection plate 32 is formed in a substantially horizontal plane shape, and an edge portion (corner portion) 32d of a predetermined angle is formed on the boundary peripheral edge between the projecting end 32a of the flow deflection plate 32 and the bottom surface 32c. 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 functions as a draining portion, and by forming the edge portion 32d at a right angle or an acute angle, drainage received on the upper surface 32b of the deflection plate 32 is prevented from going around to the lower surface 32c. Drainage can be properly diverted.

The position in the circumferential direction at which the deflection plate 32 is formed is not particularly limited as long as it is shifted from the swirl vane 30, that is, other than directly above the swirl vane 30. However, in a plan view, it is on the upper end side of the swirl vane 30. It is preferable to form it at a position shifted to one side. By forming the deflection plate 32 at a laterally displaced position on the upper end side of the swirl vane 30, the direction in which the waste water is deflected by the deflection plate 32 and the direction in which the waste water is swirled by the swirl vane 30 are substantially the same. As a result, a swirling flow can be generated more appropriately.

The size of the deflection plate 32 can be changed as appropriate, but the projection length X of the maximum portion of the deflection plate 32 in the radial direction of the pipe body 12 is the maximum length of the deflection plate 32 in the direction orthogonal to the radial direction of the pipe body 12. It is preferably less than the width Y of the portion, 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. Moreover, it is preferable that the thickness Z of the maximum portion of the deflection plate 32 in the axial direction of the pipe body 12 is approximately the same as the length X of the projection. If the deflection plate 32 is too small, it will not be possible to properly deflect the waste water. be. In this embodiment, the deflection plate 32 has a projecting length X of 12 mm, a width Y of 50 mm, and a thickness Z of 12 mm.

In the drainage pipe joint 10 provided with such a deflection plate 32 , the drainage that has flowed into the pipe body 12 from the upstream drainage stack 100 is deflected by the deflection plate 32 . Since the deflection plate 32 of this embodiment has an overall rounded shape from the upper surface 32b to the projecting end 32a as described above, as shown in FIG. It becomes smooth with a round spread. Drainage that flows smoothly has less sharp edges and suppresses the generation of bubbles. Therefore, it is possible to prevent the inside of the pipe body 12 and the drainage stack 100 from being clogged, and to prevent troubles such as splashing of sealing water. In addition, compared to the case of linear drift, the film of the drainage becomes thinner by the amount of the circular spread, so that the air can easily flow up and down in the pipe main body 12, which is suitable for exerting the drainage ability. .

In addition, since the projecting end 32a of the drift plate 32 extends substantially vertically in the longitudinal section, the drainage received on the upper surface 32b flows along the projecting end 32a and is guided downward. Therefore, it is possible to prevent the drainage that has been deflected by the deflection plate 32 from entering the horizontal pipe connecting portion 24 .

Furthermore, since the deflection plate 32 has a shape in which the central portion bulges toward the axial center of the pipe main body 12 in a plan view, the deflection plate 32 can be separated from the inner peripheral surface of the pipe main body 12 without making it too large. Drainage flowing through the closed position can also be diverted. If the flow deflection plate 32 becomes too large, the flow channel cross-sectional area of the pipe body 12 becomes small, making it difficult for air to circulate vertically. is prevented, and the drainage capacity is not hindered.

As described above, according to this embodiment, the protruding end 32a of the deflection plate 32 is formed in a convex curved shape with a central portion swelling in plan view, and the upper surface 32b is formed in a convex curved shape that becomes lower toward the protruding end 32a. Since it is formed, the flow of the waste water deflected by the deflecting plate 32 becomes smooth with a round spread. As a result, the generation of bubbles is suppressed, and the film of the drainage becomes thin, making it easier for the air to flow vertically 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 the drain pipe joint 10 having excellent drainage performance.

In the above embodiment, the drain pipe joint 10 is made of metal such as cast iron, but the drain pipe joint 10 can also be made of synthetic resin such as hard vinyl chloride. Moreover, the drain pipe joint 10 can also be configured by combining a plurality of members. FIG. 7 shows an example of a drain pipe joint 10 made of synthetic resin. Even if the drain pipe joint 10 is made of synthetic resin, the basic configuration is the same as that of the metal one. Therefore, the same reference numerals are given to the same parts, and overlapping explanations are omitted.

Further, as shown in FIGS. 7 and 8, the bottom surface 32c of the deflection plate 32 may be formed with a recessed portion (recess) 32e. Since the deflection plate 32 has the recessed portion 32e on the lower surface 32c, it is possible to reduce the amount of material, prevent sinking during manufacturing, and more reliably prevent drainage from entering the lower surface 32c.

Further, in the above-described embodiment, the drain pipe joint 10 is provided with the three horizontal pipe connection portions 24 arranged in the circumferential direction, but the number of the horizontal pipe connection portions 24 is not particularly limited, and may be one or two. etc. is also acceptable. Further, when a plurality of horizontal pipe connection portions 24 are provided, they do not necessarily have to be arranged at the same height position, and the horizontal pipe connection portions 24 may be arranged at different height positions. When the horizontal pipe connection portions 24 are arranged at different height positions, the deflection plate 32 is arranged above the axial center of the uppermost horizontal pipe connection portion 24, preferably the uppermost horizontal pipe connection portion 24. It is arranged above the pipe connection portion 24 .

Furthermore, in the above embodiment, one swirl vane 30 and one deflection plate 32 are provided, but two or more swirl vanes 30 and two or more deflection plates 32 may be provided.

It should be noted that the specific numerical values such as the dimensions and the specific shapes given above are merely examples, and can be appropriately changed according to the needs such as the specifications of the product.

REFERENCE SIGNS LIST 10: drain pipe joint 12: pipe body 14: upper pipe connection portion 20: lower pipe connection portion 24: horizontal pipe connection portion 30: swirl vane 32: non-uniform flow plate 32a: projecting end of non-flat plate 32b: top surface of non-flat plate 32c: Bottom surface of the drift plate 32d Edge portion of the drift plate 32e Thickness portion of the drift plate 100 Drainage vertical pipe 102 Horizontal drainage pipe

Claims (8)

A drainage pipe joint comprising a vertical tubular pipe body having an upper pipe connection portion formed at an upper end portion and a lower pipe connection portion formed at a lower end portion, and a horizontal pipe connection portion laterally branching from the pipe body. and
a drift plate protruding from the inner peripheral surface of the pipe body and extending along the circumferential direction;
The deflection plate is arranged 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 protruding end of the deflection plate is formed in a convex curved shape with a bulging central portion in a plan view,
an upper surface of the deflection plate is formed in a convex curved surface shape that becomes lower toward the projecting end;
A drain pipe joint, wherein an edge portion with a predetermined angle is formed on the border peripheral edge between the projecting end of the drift plate and the lower surface. 2. The drain pipe joint according to claim 1, wherein the predetermined angle of said edge portion is a right angle or an acute angle. 3. The drain pipe joint according to claim 1, wherein a lower surface of said drift plate is formed in a substantially horizontal plane. 4. The drain pipe joint according to any one of claims 1 to 3, wherein said drift plate has a thinned portion formed on its lower surface. the protruding end of the deflector plate is formed in a convex curved surface that is an arc with a constant curvature;
5. The upper surface of the flow deflection plate according to any one of claims 1 to 4, wherein the vertical cross-section of the maximum portion of the flow deflection plate in the radial direction of the pipe body is formed in a convex curved shape that is an arc with a constant curvature. drain pipe fittings. swirl vanes formed on the inner peripheral surface of the pipe body below the horizontal pipe connecting portion,
The drainage pipe joint according to any one of claims 1 to 5, wherein the deflection plate and the swirl vane are arranged with their circumferential positions shifted. 7. Any one of claims 1 to 6, wherein a 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 orthogonal to the radial direction of the pipe body. The drain pipe fitting described in . A projection length of the maximum portion of the deflection plate in the radial direction of the pipe body is 5 mm or more and 25 mm or less,
8. The drain pipe joint according to claim 7, wherein the width of the maximum portion of the deflection plate in the direction orthogonal to the radial direction of the pipe body is 10 mm or more and 85 mm or less.

Images