JPH09273197A - Collective pipe of drain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily produce a collective pipe of drain when fitting a preventive part against the backward flow to the collective pipe of drain. SOLUTION: A collective pipe of drain is provided with a lateral joint 9 connecting a lateral drain pipe 8 horizontally arranged and a vertical joint 7 connecting a vertical drain pipe 15 positioned above the lateral joint 9. And a preventive part 21 against backward flow preventing the drain from the upper side from flowing backward into the lateral joint 9, is provided at the upper side of the outflow side opening 9A of the lateral joint 9. The preventive part 21 against backward flow is installed in a retaining body 20 inserted from the vertical joint 7 and held therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage collecting pipe installed in a drainage pipe of a one-pipe type drainage pipe for flowing sewage and miscellaneous wastewater into the same drainage pipe, which is used, for example, in a high-rise housing complex. It is a thing.

[0002]

2. Description of the Related Art Conventionally, a drainage collecting pipe is composed of an upper pipe body and a lower pipe body, and a horizontal drain pipe arranged in a lateral direction is connected to the upper pipe body and the lower pipe body. There is a horizontal connection part for each of these, and there is one in which the drainage outflow side openings of these horizontal connections are formed on the surfaces that face each other in the radial direction.The drainage that flows into the drainage collecting pipe from the horizontal connection part of the upper pipe body However, there is a problem that it flows back to the horizontal drain pipe connected to the horizontal connecting portion via the horizontal connecting portion of the lower tubular body. In this case, it is conceivable to provide a backflow prevention unit to prevent backflow.
There is one disclosed in Japanese Patent No. 39511.

In this structure, a backflow preventing portion is integrally formed at the upper end side of the drainage outflow side opening of the lateral connection portion of the drainage collecting pipe so as to be inclined downward so as to move inward in the radial direction. It is formed by projecting, and by this backflow prevention part, the drainage from the vertical connection part which is formed on the upper part of the drainage collecting pipe and which connects the connection pipe part at the lower end of the vertical drainage pipe is passed through the horizontal connection part. It is designed to prevent backflow to the horizontal drain pipe connected to the horizontal connection part.

[0004]

In the above-mentioned conventional one, since the backflow preventing portion is formed integrally with the drainage collecting pipe, it is extremely manufactured when the drainage collecting pipe is formed by casting or the like. There is a problem of difficulty. Therefore, the present invention
In view of the above problems, it is an object of the present invention to provide a drainage collecting pipe with a backflow preventing portion so that it is not difficult to manufacture the drainage collecting pipe.

[0005]

The technical means taken by the present invention to achieve the above-mentioned object are a lateral connecting portion 9 for connecting the lateral drain pipes 8 arranged in the lateral direction, and this lateral connecting portion 9. A horizontal drainage pipe having a vertical connection portion 7 connected to the vertical connection pipe portion 15 located on the upper side of the horizontal connection portion 9.
In a drainage collecting pipe provided with a backflow prevention part 21 for preventing backflow of drainage from above into the lateral connection part 9 on the upper side of the drainage outflow side opening 9A of the vertical connection part 7 The holding body 20 is provided, and the backflow preventing portion 21 is provided on the holding body 20.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment. In FIG. 4, reference numeral 1 denotes a drainage collecting pipe, which is an upper pipe body 1.
It is composed of A and a lower tubular body 1B. Upper tube 1A
The vertical connection part 3 for connecting the vertical drainage pipe 2 is provided in the upper part of the above, and the horizontal drainage pipe 5 arranged in the horizontal direction and flowing the drainage from the toilet bowl 4 to the drainage collecting pipe 1 is connected in the lower part. Horizontal connection 6
Is provided.

On the other hand, a vertical connection portion 7 for connecting the upper pipe body 1A is provided on the upper portion of the lower pipe body 1B, and below the vertical connection portion 7, a sink and a sink are arranged laterally. A horizontal connection portion 9 is provided to which a horizontal drain pipe 8 for flowing drainage from a place or the like to the drainage collecting pipe 1 is connected. Further, the lower tubular body 1B is inserted into a through hole 11 formed in the slab 10 on the lower side thereof and fixed by a mortar 12, and a vertical drainage pipe 13 is connected to the lower end side thereof.

As shown in FIGS. 1 to 3, the upper tubular body 1A
The opening 6A on the drainage outflow side of the horizontal connection portion 6 of the
The openings 6A and 9A are located above the opening 9A on the drainage outflow side of the horizontal connection portion 9, and the openings 6A and 9A are respectively formed on the surfaces facing each other in the radial direction of the pipe body. Also, the lower tube body 1
A flange 14 is formed on the upper end of the vertical connecting portion 7 of B,
The connecting pipe portion 15 on the lower end side of the upper pipe body 1A is inserted into the connecting portion 7, and the sealing material 16 disposed on the inner peripheral side of the flange 14 is inserted.
A push ring 17 that is fitted onto the connecting pipe portion 15 and is fastened to the flange 14 with bolts and nuts 18 and 19.
By pressing with, the upper tube body 1A and the lower tube body 1B are connected.

A holding body 20 is provided in an upper portion of the lower tubular body 1B so as to be fitted in the vertical connecting portion 7 from above. The holding body 20 has a tubular portion 20A that is fitted in the upper end side of the main body portion of the lower tubular body 1B, and a radially outwardly projecting portion from the upper end portion of the tubular portion 20A. It is composed of a flange portion 20B that is contacted and received, and is held by the connecting portion 7.

The tubular portion 20B of the holder 20 is integrally provided with a backflow prevention portion 21 formed by cutting and raising a portion of the tubular portion 20B. The backflow prevention portion 21 is inclined so as to move downward inward in the radial direction, and is positioned on the upper end side of the drainage outflow side opening 9A of the lateral connection portion 9 of the lower tubular body 1B. , The drainage flowing out from the drainage outflow side opening 6A of the horizontal connection portion 6 of the upper pipe body 1A collides with the backflow prevention portion 21, and as shown by the phantom line arrow in FIG. 1, the horizontal connection of the lower pipe body 1B. The backflow to the lateral drainage pipe 8 is prevented through the drainage outflow side opening 9A of the portion 9.

Since the backflow preventing portion 21 is not integrally formed with the drainage collecting pipe 1 as described above, there is an advantage that the degree of freedom in setting the dimension of the backflow preventing portion 21 is large. FIG.
7 to FIG. 7 show the second embodiment. The same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only different points will be described. In FIG. 5, the drainage collecting pipe 1
On the upper side of the horizontal connection portion 6 of the upper pipe body 1A, the function of pulling the drainage from the vertical drainage pipe 2 to one side and the function of preventing backflow to the horizontal drainage pipe 5 connected to the horizontal connection portion 6 The non-uniform flow guide 22 is integrally formed so as to be inclined downward.

On the inner peripheral surface of the lower side of the lower tube body 1B, there is provided a swirl vane 23 which is inclined with respect to the pipe axis direction (or spiraled around the pipe axis). The drainage flowing down into the pipe 1 is changed into a swirling flow, and the drainage is caused to flow along the pipe wall, so that a space without drainage flow, that is, an air core is generated in the central portion of the drainage pipe. The swirling flow and the air core reduce the fluctuation of the air pressure in the pipe, which is the cause of the "gurgling noise", and exhibit a smooth and quiet drainage flow performance.

On the upstream side of the drainage collecting pipe 1, a drainage collecting pipe or a curved pipe having swirling vanes having the same function is provided, and the drainage swirled from the vertical drainage pipe 2 is drained. Flow down to tube 1. In addition, the drift guide 2
Reference numeral 2 is configured so as not to impede (or positively swirl) the swirling flow of drainage. The holding body 20 is formed with a cutout portion 24 that is formed by cutting out a part of the holding body 20 in the axial direction, so that the diameter of the holding body 20 can be expanded or contracted. This is because when the drainage collecting pipe 1 is formed by casting, a slight error inevitably occurs in the diameter of the drainage collecting pipe 1, and the cutout portion 24 causes the holding body 20 of the holding body 20 in the first embodiment. This is to avoid a situation in which the holding body fitting portion of the upper portion of the lower tubular body 1B becomes smaller than the diameter and the holding body 20 cannot be fitted.

Further, as shown by the phantom line in FIG. 7, the holding body 20 has a diameter in a state before being fitted to the upper portion of the lower tube body 1B as compared with a state in which it is fitted to the upper portion of the lower tube body 1B. Has been expanded. Therefore, when fitting the holding body 20 to the upper portion of the lower tubular body 1B, the holding body 20
Elastically deform to reduce the diameter. by this,
When the holding body 20 is fitted to the upper portion of the lower tubular body 1B, it is attached almost perfectly to the upper portion of the lower tubular body 1B by the elastic restoring force.

This is because if the holding body 20 largely protrudes radially inward from the lower end opening edge of the upper tubular body 1A, it adversely affects the swirling flow of the drainage described above.
This is because it is attached to the upper part of B. The backflow prevention portion 21 is formed separately from the holding body 20 and
It is welded and fixed to 0.

[0016]

According to the present invention, the horizontal connecting portion 9 for connecting the horizontal drainage pipes 8 arranged in the horizontal direction and the vertical connecting pipe portion 15 located above the horizontal connecting portion 9 are provided. A drainage collecting pipe having a vertical connecting portion 7 for connection, wherein the horizontal connecting portion 9 is provided.
In a drainage collecting pipe provided with a backflow prevention part 21 for preventing backflow of drainage from above into the lateral connection part 9 on the upper side of the drainage outflow side opening 9A of the vertical connection part 7 Since the holding body 20 is provided and the backflow preventing portion 21 is provided on the holding body 20, it is not difficult to manufacture the drainage collecting pipe when the backflow preventing portion 21 is provided.
Further, since the holding body 20 provided with the backflow preventing portion 21 is fitted in and held from the vertical connecting portion 7, it can be easily attached.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a drainage collecting pipe according to a first embodiment.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a plan cross-sectional view of the drainage collecting pipe according to the first embodiment.

FIG. 4 is a side view of the piping structure according to the present invention.

FIG. 5 is a cross-sectional view of a drainage collecting pipe according to a second embodiment.

6 is a sectional view taken along the line BB of FIG.

FIG. 7 is a plan sectional view of a drainage collecting pipe according to a second embodiment.

[Explanation of symbols]

 1 Drainage Collecting Pipe 8 Horizontal Draining Pipe 7 Vertical Connecting Portion 9 Horizontal Connecting Portion 9A Opening 15 Connecting Pipe Portion 20 Holding Body 21 Backflow Prevention Portion

Claims (1)

[Claims] 1. A horizontal connecting part (9) for connecting horizontal drain pipes (8) arranged in a horizontal direction, and a vertical connecting pipe part (15) located above the horizontal connecting part (9). ) Connecting the vertical connection part (7), the drainage from the upper side of the drainage outflow side opening (9A) of the horizontal connection part (9) side connection part (9). In a drainage collecting pipe provided with a backflow prevention part (21) for preventing backflow to 9), a holding body (20) fitted and held by the vertical connection part (7) is provided, and the holding body (20) is provided. 20) A drainage collecting pipe, characterized in that the backflow prevention portion (21) is provided in the drainage collecting pipe.