JP2000008468A - Joint for drain pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint for a drain pipe which prevents backflow of drainage to the lateral branch pipe side from an outflow port of a connecting part of a lateral branch pipe even when the bore of a vertical pipe part is small. SOLUTION: This joint has a vertical pipe part which is connected with vertical drain pipes 7 at the top and the bottom and constitutes a part of a vertical pipeline and a connecting part 2 of a lateral branch pipe which has an outflow port 21 of drainage to the vertical pipe part at one end and is connected with the lateral branch pipe at the other end. In this case, a projection 4a which deflects the direction of part of drainage flowing down to run over the outflow port 21, out of the drainage flowing down as a whirling flow into the vertical pipe part along the wall of the pipe from the upper vertical drain pipe 7, so as to prevent backflow of the drainage in the vertical pipe part into the connecting part 2 of the lateral branch pipe from the outflow port 21, is provided along the inner wall surface of the vertical pipe part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage pipe joint.

[0002]

2. Description of the Related Art In middle- and high-rise buildings and the like, drainage pipes are arranged vertically in such a way as to pass through each story, and horizontal branches connected to various sanitary and kitchen equipment on each floor. Drainage such as sewage discharged from each level is once collected from the horizontal branch pipe to the vertical pipe, and is discharged to the sewage main pipe and the sewage main pipe via the vertical pipe. It has become.

[0003] As a drainage vertical pipe forming a vertical pipe passage, a pipe with an internal spiral rib as disclosed in Japanese Patent Application Laid-Open No. 9-174709 has been proposed.

[0006] As shown in FIG. 6, the inner spiral ribbed tube 100 has a plurality of spiral ribs 101 provided on the inner surface, and the drainage flowing into the inner spiral ribbed tube 100 is swirled by the spiral rib 101. The flow is caused to flow down along the inner wall surface of the tube 100 with the inner spiral rib. That is, when a large amount of drainage flows into the vertical pipe at a time from the horizontal branch pipe, the inside of the vertical pipe is closed and the inside of the vertical pipe becomes negative pressure. As a result, the traps of various sanitary and kitchen equipment connected to the horizontal branch pipe would break,
There is a problem that the bad smell in the drainage pipe flows back into each room and the like. However, by using the pipe 100 with the internal spiral ribs as described above for the vertical pipe, an air core is always generated in the vertical pipe. To prevent blockage of the vertical pipeline.

[0005] However, when the pipe 100 with the internal spiral rib is used for the vertical pipe as described above, the drainage flows down as a swirling flow along the spiral rib 101 as described above. Works. Therefore, as shown in FIG. 6, when the vertical pipe portion 201 uses the drainage pipe joint 200 having the same diameter as the pipe 100 with the internal spiral rib, the outlet of the horizontal branch pipe connection portion 202 that opens on the side wall of the vertical pipe portion 201. Drainage may enter the side branch pipe connection part 202 side from the side 203 by centrifugal force and flow back to various sanitary appliances / kitchen appliances at each floor, particularly at a lower floor, through the horizontal branch pipeline.

Therefore, a joint in which the diameter of the vertical pipe is larger than that of the upper and lower vertical pipes is used to prevent the backflow of drainage from the outlet of the horizontal branch pipe connection to the horizontal branch pipe. But,
When the diameter of the vertical pipe portion of the joint is increased, the width of the entire joint must be increased. When the width of the entire joint increases, the piping space for narrowing the living space of the building has to be increased according to the diameter of the joint. Also, there is a problem that metal fittings for supporting and fixing the pipe to the slab or the wall have to be large, and the equipment cost is high.

[0007]

SUMMARY OF THE INVENTION In view of such circumstances, the present invention is directed to a structure in which drainage from the outlet of the horizontal branch pipe connection portion to the horizontal branch pipe side flows backward even if the diameter of the vertical pipe section is small. It is an object of the present invention to provide a drainage pipe joint that does not need to be performed.

[0008]

In order to achieve such an object, a joint for a drain pipe according to the present invention has a vertical pipe section in which upper and lower drain pipes are respectively connected to form a part of a vertical pipe channel. And, at one end, a drainage pipe joint having a discharge port for drainage to the vertical pipe section and a horizontal branch pipe connection section connected to the horizontal branch pipe at the other end, the swirl flow from the upper drainage vertical pipe and Of the waste water that has flowed down the vertical pipe along the pipe wall, the flow direction of some of the waste water that is going to flow down the outlet is deflected, and the waste water in the vertical pipe from the outlet is deflected. A protrusion is provided along the inner wall surface of the vertical pipe portion so as to prevent the backflow from flowing into the horizontal branch pipe connection portion.

Further, in the above-mentioned joint for drainage pipes of the present invention, the horizontal branch pipe connecting portion drains the drainage flowing into the vertical pipe portion through the horizontal branch pipe connecting portion through the vertical pipe portion. Or at least a portion of the ridge located above the outflow port has an inner spiral drainage vertical pipe as defined in claim 3. Is preferably formed in the same inclination direction as the inclination direction of the spiral.

The number of connecting portions of the horizontal branch pipes of the joint for drainage pipes of the present invention is not particularly limited, and may be one or more.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described in detail with reference to the drawings. FIG. 1 and FIG.
1 illustrates an embodiment of a drainage pipe joint according to the present invention.

As shown in FIGS. 1 and 2, the drainage pipe joint A includes a vertical pipe portion 1 and a horizontal branch pipe connection portion 2. The vertical pipe section 1 is provided with upper and lower receiving ports 3 and 3 of an inner spiral ribbed pipe 7 as a drainage vertical pipe described later, and has an inner diameter substantially the same as the inner diameter of the inner spiral ribbed pipe 7.

The horizontal branch pipe connecting portion 2 has an outlet 21 opening at one end into the vertical pipe portion 1, a receiving port 22 for the horizontal branch pipe 8 at the other end, and an outlet 21. The flow path is formed in a curved shape so as to form a swirling flow in which the drained water flows down along the inner wall of the vertical pipe portion 1. In addition, the inner wall of the vertical pipe portion 1 is formed so as to flow from the upper inner spiral ribbed pipe 7 as a swirling flow into the vertical pipe portion 1 along the pipe wall so as to flow over the outlet 21. A ridge 4a is provided to deflect the flow direction of a part of the drainage to be flown down and to prevent the drainage from flowing into the horizontal branch pipe connection portion 2 from the outlet 21.

That is, as shown in FIG. 1B and FIG. 2, the ridge 4a has a vertical portion 41 provided along one edge of the outlet 21 in the width direction, and the vertical portion 41. 4
An inner spiral rib 71 of an inner spiral rib 7 to be described later is provided from the upper end of the pipe 1 with an inclined portion 42 provided at substantially the same inclination angle. ing.

Since the drainage pipe joint A is provided with the ridges 4a as described above, the pipe 7 with the upper inner spiral rib is provided.
Of the wastewater flowing down the vertical pipe portion 1 as a swirling flow from the outlet, the wastewater that is going to pass over the outflow port 21 is a ridge 4a.
As a result, it is deflected so as to flow down a position deviated from the outlet 21. Therefore, the drainage does not flow back to the side branch pipe side through the side branch pipe connection portion 2.

The flow passage of the horizontal branch pipe connecting portion 2 converts the drainage flowing from the horizontal branch pipe (not shown) into a flow along a swirling flow flowing down the vertical pipe portion 1 to an outlet 21. The vertical pipe portion 1 is formed to have a flow path shape, so that it is more reliably prevented that the swirl flow is disturbed by the inflow of drainage from the horizontal branch pipe and the drainage is blocked in the vertical pipe. be able to.

Further, since the ridges 4a are provided with the inclined portions 42, the ridges 4a do not reduce the flow speed of the drainage much.

FIG. 3 shows a second embodiment of the drainage pipe joint according to the present invention.
Of the present embodiment. As shown in FIG. 3, the drainage pipe joint B is the same as the drainage pipe joint A described above, except that the ridge 4b is provided in an umbrella shape.

FIG. 4 shows a third embodiment of the drainage pipe joint according to the present invention.
Of the present embodiment. As shown in FIG. 4, the drainage pipe joint C is the same as the drainage pipe joint A described above, except that the ridge 4c is provided horizontally.

FIG. 5 shows a fourth embodiment of a drain pipe joint according to the present invention.
Of the present embodiment. As shown in FIG. 5, the drainage pipe joint D is the same as the drainage pipe joint A described above, except that the ridge 4d is only an inclined portion.

The drainage pipe joint according to the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the pipes 7 with the internal spiral ribs are connected vertically, but in some cases, a drain pipe without ribs may be connected. Further, in the above-described embodiment, the receiving ports 3 and 3 are provided above and below the vertical pipe portion 1, however, the receiving ports 3 and 3 may be formed in a spout shape.

Further, in the above embodiment, the inclined portion 4
Although the angle of inclination of 2 is made to substantially match the angle of inclination of the rib 71, it is not always necessary to make them coincide.

[0023]

The drain pipe joint according to the present invention is constructed as described above. Therefore, even if the diameter of the vertical pipe section is reduced, the joint for the drain pipe from the outlet of the horizontal branch pipe connecting section to the horizontal branch pipe side. The drainage does not flow backward. Therefore, the width of the entire joint can be reduced, and the piping space can be reduced. Also,
The fittings and the like for supporting and fixing the joint and the vertical pipe to the slab and the wall can be small, and the equipment cost can be reduced.

Further, according to the second aspect, the swirling flow is not disturbed by the inflow of drainage from the horizontal branch pipe, and the blockage of the vertical pipe can be prevented more reliably.
Furthermore, according to the third aspect, the flow rate of the drainage can be smoothly lowered without much lowering the flow rate of the drainage by the ridge.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a drain pipe joint according to the present invention, wherein FIG. 1 (a) is a plan view thereof and FIG. 1 (b) is a front view thereof.

FIG. 2 is a cross-sectional view illustrating a use state of the drainage pipe joint of FIG.

FIGS. 3A and 3B show a drain pipe joint according to a second embodiment of the present invention, wherein FIG. 3A is a plan view and FIG. 3B is a front view.

FIG. 4 shows a drain pipe joint according to a third embodiment of the present invention, wherein FIG. 4 (a) is a plan view and FIG. 4 (b) is a front view.

FIG. 5 shows a fourth embodiment of a drain pipe joint according to the present invention, wherein FIG. 5 (a) is a plan view and FIG. 5 (b) is a front view.

FIG. 6 is a sectional view of a conventional drainage pipe.

[Explanation of symbols]

 A, B, C, D Drainage pipe joints 1 Vertical pipe section 2 Horizontal branch pipe connection section 21 Outflow port 4a, 4b, 4c, 4d Ridge 42 Inclined section 7 Pipe with internal spiral rib (drainage vertical pipe)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuhiro Okuyama 75 Noriji, Ritto-cho, Kurita-gun, Shiga Prefecture Inside Sekisui Chemical Co., Ltd. F term (reference) 2D063 BA22 3H019 AA01 AA04 BA04 BB01 DA03

Claims (3)

[Claims] 1. A vertical pipe section which is connected to upper and lower drain pipes to form a part of a vertical pipe path, has an outlet for drainage to the vertical pipe section at one end, and a horizontal branch at the other end. A drain pipe joint having a horizontal branch pipe connection portion to which the pipe is connected, wherein, among the waste water that has flowed down the vertical drain along the pipe wall as a swirling flow from the upper drain vertical pipe, A ridge that deflects the downward flow of some of the wastewater that is going to flow down to prevent the drainage in the vertical pipe from flowing back into the horizontal branch pipe connection from the outlet, along the inner wall of the vertical pipe A drain pipe joint characterized in that it is provided with a drain pipe. 2. The horizontal branch pipe connecting portion has a flow path shape that changes the drainage flowing into the vertical pipe portion through the horizontal branch pipe connecting portion in a direction along the swirling flow of the drainage flowing down the vertical pipe portion. The drainage pipe joint according to claim 1, which is formed. 3. The ridge according to claim 1, wherein at least a portion of the ridge located above the outlet is formed to be inclined in the same inclination direction as the spiral direction of the inner spiral drainage vertical pipe. Fitting for drainage pipe.