JP2000297448A - Drain pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To flow down drain while turning by making a upstream side from the inflow opening of a lateral branch pipe drain a start point, and providing a swirl guide for swirling the drain. SOLUTION: A pipe joint 1 has a shell part 10 having a lateral branch pipe connection part 11 for connecting one lateral branch pipe 4, an upper connection part 12 provided on the upper part of the shell part 10 and for connecting the vertical pipe 2 of an upstream side, and a lower connection part 13 provided on the lower part of the shell part 10 and for connecting to the vertical pipe 3 of a downstream side. A swirl guide 20 for swirling the drain of the vertical pipe flowing down from the vertical pipe 2 in the inside of the shell part 10 is provided in the form of a protrusion inward of the pipe joint. Thereby, the drain T of the vertical pipe flowing down from the vertical pipe 2 is guided by the swirl guide 20 in this side (upstream side) of a lateral branch pipe inflow opening 11a to become a swirl flow. Thus, an air core can be produced in the center part of the pipe, and the pressure fluctuation of the inside of the pipe can be relieved thereby.

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 for connecting a drainage horizontal branch pipe on each floor to a drainage stack in a drainage path of an apartment house, for example.

[0002]

2. Description of the Related Art Generally, a drainage pipe joint of this type includes an upstream connection port for connecting an upstream standing pipe, a body connected to a lower portion of the upstream connection port, and a body connected to the body. It has a tapered pipe portion connected to the lower portion, and a lower connection port for connecting a downstream standing pipe connected to a lower portion of the tapered pipe portion, and a plurality of horizontal branch pipes connected to the body portion. For connecting a horizontal branch pipe. Since the trunk is a portion into which a large amount of drainage flows at once from a plurality of horizontal branch pipes, the trunk is generally set to have a larger diameter than the vertical pipe.

[0003] In such a drainage collecting pipe joint, there is known a technique of suppressing a pressure fluctuation in a pipe by giving a spiral swirling flow to the draining water flowing down to form an air core at the center of the pipe. As a means to give swirl flow to drainage,
Conventionally, for example, as disclosed in Japanese Patent Publication No. Sho 62-50717, a plurality of turning guides inclined with respect to the pipe axis are provided on the inner surface of the tapered pipe portion, and the draining water flowing down collide with the turning guide. Thus, a configuration for swirling the drainage has been provided.

[0004]

In such a drainage collecting pipe joint to which a plurality of horizontal branch pipes are connected, a technique is provided in which a swirl guide is provided in a tapered pipe portion to make the drainage flow downward while spirally turning the drainage. However, as for a normal one-port type (for example, "ST") drainage pipe joint that connects only one horizontal branch pipe, the one provided with a means for turning the drainage of a vertical stack from the upstream is provided. Had not been. An object of the present invention is to provide a one-port type drainage pipe joint having a swivel guide for causing drainage to flow down while swirling.

[0005]

For this reason, the present invention provides a drainage pipe joint having the structure described in each claim. According to the drainage pipe joint according to the first aspect, since the turning guide for turning the drainage is provided starting from the upstream side of the horizontal branch pipe drainage inlet, the tapered pipe portion in the drainage collecting pipe joint is provided. A swirling flow can be generated effectively even in a one-port type drain pipe joint that does not use the same.

Conventionally, when a swivel guide is provided in a tapered pipe portion of a drainage pipe joint, such a tapered pipe portion is a portion usually embedded in a concrete slab. When the swivel guide is located in a portion embedded in the concrete slab, Vibration and noise generated by the collision of drainage are transmitted through the concrete slab, causing serious noise damage especially to residents on lower floors. In this regard, according to the drainage pipe joint according to the first aspect, since the swivel guide is provided at a portion that is not normally embedded in the concrete slab, it is possible to reduce the conventional noise problem.

The swivel guide has a configuration in which a plate-shaped convex portion is integrally formed on the inner wall surface of the pipe joint to form a swivel guide, and the wall of the pipe joint is bent in an inwardly bent shape. This may be used as a turning guide.

According to the drainage pipe joint according to the second aspect, it is possible to generate a left-handed swirling flow in a plan view, and particularly to generate a smooth swirling flow when used in an area in the northern hemisphere. Therefore, pressure fluctuation in the pipe can be more effectively prevented.

According to the third aspect of the present invention, the swivel guide is provided so as to protrude above the horizontal branch pipe drainage inflow port. Backflow can be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.
A description will be given based on FIG. FIG. 1 shows an example of piping construction using a drainage pipe joint (hereinafter simply referred to as “pipe joint”) 1 of the present embodiment. C in the figure shows a concrete slab that partitions the upper floor and the lower floor in a building. In this concrete slab C, a standing pipe 3 on the downstream side is backfilled and fixed. The pipe joint 1 includes a trunk portion 10 having a horizontal branch pipe connection portion 11 for connecting one horizontal branch pipe 4,
An upper connecting portion 12 provided at an upper portion of the body portion 10 and connecting the upright standing pipe 2 to the upstream side;
Lower connection part 13 for connecting to the above-mentioned downstream standpipe 3
have. The downstream standpipe 3 has a straight pipe shape, and has a connection portion 3a at an upper portion thereof for inserting and connecting the lower connection portion 13 of the pipe joint 1. Although not shown, a packing is interposed between the insertion connection portion and the lower connection portion 13 so that they are connected to each other in a watertight manner.

The horizontal branch pipe 4 is connected to the horizontal branch pipe connecting portion 11 through a substantially cylindrical packing in a watertight manner. A drainage device (not shown) such as a toilet or a kitchen sink is connected to the pipe joint 1 via the horizontal branch pipe 4. The pipe joint 1 according to the present embodiment is a type of pipe joint having only one horizontal branch pipe connection portion 11 around the body 10, and the inside diameter of the body 10 is substantially the same as the inside diameter of the standpipe 2. (About 1.15 times in this figure). On the other hand, in the case of a so-called drainage joint which has two or more horizontal branch pipe connections around the trunk and can connect two or more horizontal branch pipes, the trunk usually has The inner diameter is set to be larger than that of the upright pipe (for example, 1.31 times), so that pressure fluctuation in the pipe is suppressed even when a large amount of drainage flows in from the horizontal branch pipe at one time. In order to absorb the difference in diameter of the body, the above-described tapered pipe is set between the body and the lower connecting portion of the drainage collecting pipe joint.

The upright stack 2 on the upstream side is connected by inserting its lower end into the upper connecting portion 12. Upright standing pipe 2
Is also connected to the upper connecting portion 12 in a watertight manner by a packing not shown. In addition, the drainage pipe joint 30 of another form shown in FIG. 2 is what is called a flexible joint type, and the form of a lower connection part differs from the pipe joint 1 of the above-mentioned form called a straight pipe type. The lower connecting portion 31 of the pipe joint 30 is provided with a flange portion for bolting, and the downstream standing pipe 32 is inserted into a fixing ring 32 a and a packing (not shown), and the upper end thereof is connected to the lower connecting portion 31. By inserting and fixing the fixing ring 32a to the flange portion of the lower connection portion 31 with a bolt, the downstream standing pipe 32 is connected to the lower connection portion 31 in a watertight manner. Other configurations are the same as those of the pipe joint 1, so the former pipe joint 1 will be described.

A swirl guide 20 for swirling upright drainage flowing down from the upright pipe 2 is provided inside the body 10.
Are provided so as to project inward of the pipe joint. That is, as shown in the figure, the turning guide 20 is formed by bending a part of the wall forming the body 10 into a V-shape inward of the pipe joint. In this manner, the swivel guide 2 bulges inward of the body 10 by so-called stealing.
By providing 0, the weight and material cost of the pipe joint 1 are reduced, and the rigidity thereof is increased.

As shown in FIG. 3, the swivel guide 20 is located on the inner wall surface of the pipe joint at a position upstream of the position where the horizontal branch pipe drainage Y flows in (inflow port 11a on the pipe center side of the horizontal branch pipe connection portion 11). As a starting point, it is provided so as to protrude like an eave. The upper surface (guide surface 20a) of the turning guide 20 is directed downward to the left when viewed from the center of the tube, and is approximately 50
゜ (left tilt angle θ1). It is preferable that the left tilt angle θ1 is appropriately changed and set in a range of 30 ° to 70 °. As shown in FIG. 4, the guide surface 20a of the revolving guide 20 is inclined toward the pipe center side at an angle of about 5 ° (forward inclination angle θ2) with respect to a horizontal line. It is preferable that the forward inclination angle θ2 is appropriately changed and set in the range of 0 ° to 45 °.

According to the drainage pipe joint 1 configured as described above, the stack drainage T flowing down from the stack pipe 2 is guided by the swirl guide 20 just before (upstream) the horizontal branch pipe inflow port 11a, and the swirl flow is performed. Therefore, an air core can be generated at the center of the pipe, whereby pressure fluctuation in the pipe is reduced.

Moreover, since the swirl guide 20 is arranged upstream of the inflow port 11a of the lateral branch pipe drainage Y, the portion (tapered pipe portion) embedded in the concrete slab C as in the drainage pipe joint described above. It is possible to suppress generation of noise as in the case where the turning guide is arranged. In this type of pipe joint 1, the horizontal branch pipe connecting portion 11 is usually arranged on the upper surface side of the concrete slab C (see FIG. 1 or FIG. 2).
By arranging the turning guide 20 on the upstream side of a), the turning guide 20 is located at a position apart from the concrete slab C.

Further, in the case of the present embodiment, the swirl guide 20 is provided so as to protrude like an eave on the upstream side of the inflow port 11a of the lateral branch pipe drainage Y, so that the upright drainage T is inflow.
This prevents backflow into the horizontal branch pipe connection portion 11 and eventually into the horizontal branch pipe 4 via a. Although not shown, the turning guide 20 may be formed in a crescent shape as shown by a two-dot chain line in FIG.

Various modifications can be made to the embodiment described above. For example, the swivel guide 20 has exemplified a configuration in which the wall portion of the pipe joint 1 is provided by bending the wall portion of the pipe joint inwardly, but as shown in FIG. 5 and FIG. May be formed integrally with each other to form the turning guide 21.

Further, the swivel guide 20 has been illustrated as an eaves-like arrangement above the inflow port 11a of the lateral branch pipe drainage Y, but is provided from the upstream side of the inflow port 11a. If so, the turning guide may be arranged at any part of the inner wall surface of the pipe joint in the circumferential direction. For example, as shown in FIG. 7, the turning guide 22 may be arranged on the side of the wall facing the inflow port 11a. In this case, in order to prevent the swirling flow TS guided by the swirling guide 22 from swirling as a result, the backflow preventing wall 25 is provided at a side portion (a side portion near the turning direction) of the inflow port 11a. Can be formed overhanging. Moreover, by inclining the backflow prevention wall 25 at an appropriate angle in a direction in which the backflow prevention wall 25 projects inward of the inflow port 11a as shown by a two-dot chain line in FIG. A counterclockwise swirling flow can be obtained, whereby the blockage in the pipe can be more reliably prevented and its pressure fluctuation can be suppressed.

Although not shown, the backflow prevention wall 2 is not shown.
5 is extended above the inflow port 11a and connected to the upper end of the swivel guide in an arch shape, so that a branch function for branching the drainage of the upright pipe in the downflow direction right and left above the inflow port 11a is provided. A multifunctional rectification guide having both a swirling function for swirling the upright drainage along the inner wall surface of the pipe and a backflow preventing function for preventing the swirling drainage curtain from flowing back to the inlet 11a can be provided.

In FIG. 1, concrete slab C
A lower connecting portion 13 is attached to the downstream standing
The pipe joint 1 has a configuration for connecting the lower connecting portion 1.
3 can also be applied to a pipe joint in a form in which the concrete slab C is penetrated by being formed longer than the concrete slab C and is connected to a standpipe on the downstream side below the concrete slab C. Also in this case, the slab embedding portion (the long lower connecting portion) is not provided with a swirl guide, but is provided with a swivel guide starting from the upstream side of the inflow port 11a of the horizontal branch pipe drainage. The operation and effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view of a construction example using a drainage pipe joint of the present embodiment.

FIG. 2 is a side view of a construction example using a drainage pipe joint of another embodiment.

FIG. 3 is a perspective view showing a state in which a stack drainage is turned by a turning guide.

FIG. 4 is a sectional view of a turning guide.

FIG. 5 is a perspective view of a turning guide according to another embodiment.

FIG. 6 is a vertical cross-sectional view of a turning guide of another embodiment.

FIG. 7 is a cross-sectional view of a pipe joint using both a turning guide and a backflow prevention wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Drainage pipe joint 2 ... Upstream standpipe 3 ... Downstream standpipe 4 ... Horizontal branch pipe 10 ... Trunk 11 ... Horizontal branch pipe connection part, 11a ... Horizontal branch pipe drainage inlet 12 ... Upper part Connection part, 13 ... Lower connection part C ... Concrete slab T ... Standpipe drainage Y ... Horizontal branch pipe drainage 20 ... Swivel guide 30 ... Drainage pipe joint of another form θ1 ... Left tilt angle, θ2 ... Forward tilt angle 21 ... Other form of drainage Swing guide 25 ... Backflow prevention wall

Claims (3)

[Claims] 1. An upper connecting part for connecting an upstream standing pipe, a lower connecting part for connecting a downstream standing pipe, a trunk located between the upper and lower connecting parts, and the trunk. In the drainage pipe joint having a horizontal branch pipe connection part provided in the section, a swivel guide for flowing down the sewage pipe drainage flowing down through the upright stack while spiraling, A drain pipe joint formed on the inner wall surface and protruding from an upstream side of the horizontal branch pipe connection portion as a starting point. 2. The drainage pipe joint according to claim 1, wherein the swivel guide is provided so as to be inclined in a direction downward to the left as viewed from the pipe shaft side. 3. The drainage pipe joint according to claim 1, wherein the swivel guide is provided above the horizontal branch pipe connection part.