JP3459041B2 - Drain pipe connection socket - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage pipe connection socket that allows drainage flowing in a drainage pipe installed in a vertical direction to flow while rotating along an inner peripheral surface of the drainage pipe.

[0002]

2. Description of the Related Art In a two-story building or more, a drainage pipe for flowing drainage from the upper floor to a sewer main or the like is installed substantially vertically. Further, when the drainage pipe is long, a plurality of drainage pipes are connected to each other by a drainage pipe connecting socket.

When drainage flows through such a drain pipe,
The wastewater becomes turbulent flow and splashes, producing noise. That is, in the drainage pipe, a part of the drainage falls downstream from the inner peripheral surface of the drainage pipe and collides with the inner peripheral surface of the drainage pipe during this fall to generate noise or splash. Then, the droplets are scattered in random directions and collide with other droplets or the inner peripheral surface of the drain pipe to generate noise. Furthermore, when a large amount of drainage flows into the drainage pipe at one time, the drainage completely blocks the middle of the drainage pipe, and the air below the falling drainage is entrained in the drainage and becomes bubbles, and when the bubbles burst Makes a loud noise. Such noise is particularly uncomfortable for the occupants of a residence, such as a condominium. Therefore, on a part of the inner surface of the drainage pipe, a spiral blade with a certain width,
It is known that a spiral projection having a certain height is provided to swirl falling wastewater in a spiral shape.

[0004]

However, in the conventional spiral blades and projections provided on the inner surface of the drainage pipe, the width of the blades and the height of the projections are constant. Therefore, if the width of the blade is narrow or the height of the projection is low, the function of swirling the drainage along the pipe wall is insufficient, and on the contrary, the width of the blade is too wide or the height of the projection is too high. In some cases, when a large amount of drainage flows, the drainage stagnates, which may increase noise. Therefore, an object of the present invention is to effectively swirl the wastewater regardless of the amount of the wastewater so as to remove the noise caused by the wastewater.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a tubular connecting socket inserted in the middle of a vertical drain pipe, the tubular main body portion having drain pipe connecting portions at the upper and lower ends, respectively.
An intermediate region sandwiched between the drain pipe connecting portions has a spiral guide blade extending from the inner surface toward the cylinder axis. The width of the guide vanes is narrow at the upper part and widens downward.

It is desirable that a plurality of the guide vanes are provided in the same main body portion at different positions along the circumferential direction of the inner surface of the main body portion, and the main body portion and the guide vanes are integrally formed of synthetic resin. Is desirable.

When a small amount of drainage flows down along the cylinder wall in the above-mentioned connection socket, it naturally swirls by the guide vanes, and when it falls at a position near the cylinder axis, the width of the lower part of the guide vanes is wide. Then, it collides with this and starts turning. Also,
When a large amount of drainage flows down, the peripheral part of the drainage first starts to swirl, and as the width of the guide vanes increases as it moves downward, the swirl range expands toward the center, causing stagnation. The entire drainage can be swirled without.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a longitudinal sectional view of a drainage pipe connection socket (hereinafter also referred to as “socket”) according to an embodiment of the present invention and a drainage pipe connected using this socket. 2 is a plan view of the socket. Reference numerals 1 and 2 denote cylindrical drain pipes arranged vertically in a substantially vertical direction, and are made of, for example, synthetic resin. 3 is the drain pipe 1,
It is a socket for connecting a drainage pipe that connects 2 and is also made of synthetic resin.

As shown in FIGS. 1 and 2, the drain pipe connecting socket 3 includes a main body portion 6 and a plurality of, for example, nine guide blades 4. The main body 6 has a substantially short cylindrical shape, the inner diameter of which is the same as the inner diameter of the drain pipes 1 and 2, and the outer diameter of which is larger than the outer diameter of the drain pipes 1 and 2. Then, receiving ports 8 and 9 for inserting the drain pipe end portions are provided inside the upper opening edge and inside the lower opening edge of the main body portion 6, respectively. The inner diameter of each of the receiving ports 8 and 9 is substantially equal to the outer diameter of the drain pipes 1 and 2.

Each of the nine guide blades 4 is provided on the inner peripheral surface 6a of the main body 6 sandwiched between the receiving ports 8 and 9, and is formed integrally with the main body 6. All the guide vanes 4 have the same shape and have a plate shape of a substantially right triangle. As shown in the plan view of FIG. 2, the nine guide blades 4 are provided at intervals of about 40 ° along the circumferential direction of the inner peripheral surface 6a of the main body 6, and the first one having the smaller apex angle. Of the first corner 4a and the second corner (corner forming a right angle) 4b.
The first longitudinal edge 4c between the two is joined to the inner peripheral surface 6a of the main body 6. The angle a formed by the vertical axis 5 passing through the first corner portion 4a and the first edge portion 4c is 6 °. The apex angle b of the first corner portion 4a is about 10 °. As shown by the arrow 7 in FIG. 2, each guide vane 4 is provided so as to be inclined in the direction in which the drainage is rotated counterclockwise when viewed from above.

When the drain pipe connecting socket 3 configured as described above is used, the drainage which flows into the socket 3 through the drain pipe 1 and through any portion of the upper opening edge of the socket 3 or the vicinity thereof. , The inner peripheral surface 6a of the socket 3 collides with the surface of the guide vane 4 facing the upstream side, is guided by this, and rotates downward in the circumferential direction of the socket 3 as indicated by arrows 7 and 8. It flows into the drain pipe 2. In the northern hemisphere, since the drainage is given a force to rotate counterclockwise due to the rotation of the earth, the inclination direction of the guide vanes 4 is also the direction in which the drainage is rotated counterclockwise. However, each guide blade 4 may be provided so as to rotate the drainage clockwise.

In the above described drain pipe connecting socket, if the amount of drainage flowing down through the drainage pipe 1 is small, the drainage flowing down along the inner wall thereof is swirled by the guide vanes 4. Since the width of the lower part of the guide vane 4 is wide, the drainage that has dropped near the center of the drainage pipe also collides with this and is given a swirl. In addition, even if the amount of drainage that flows down is large, swirl is first given to the part near the inner wall, and the width of the guide vane widens as it flows downward, so swirl also gradually goes to the central part. Given that the entire drainage will swirl uniformly, the drainage will not stagnate and cause noise.

Further, when the width of the guide blade 4 is suddenly widened from the upper portion, the wastes in the drainage are caught on the guide blade 4 and the circulation of the drainage is obstructed.
Since the edge portion 4d of the blade gradually rises toward the center as it goes downward, the waste material slides on the edge portion 4d and is discharged downward. Can be prevented.

The vertical length of the blades and the number of installed blades are appropriate. If the vertical length is increased to increase the angle along the socket inner peripheral surface 6a, drainage is effective even with a relatively small number of blades. Can be made to swivel.

[0015]

As described above, according to the present invention, not only can swirling be effectively provided regardless of the state of drainage flowing down, but also wastes in the drainage can be guided to the guide blades. Since it can be prevented from being caught and obstructing distribution, it is possible to completely prevent generation of noise due to insufficient swirling of drainage and obstruction of distribution.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a drainage pipe connection socket according to an embodiment of the present invention and a drainage pipe connected by the socket.

2 is a plan view of the drain pipe connection socket shown in FIG. 1. FIG.

[Explanation of symbols]

1 Upper drain pipe 2 Lower drainage pipe 3 Drain pipe connection socket 4 guide vanes 6 main body

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E03C 1/12 F16L 21/00

Claims (3)

(57) [Claims] 1. A spiral guide vane extending in the direction of the cylinder axis is provided on the inner surface of a cylindrical main body having upper and lower ends each having a drainage pipe connecting portion and arranged substantially vertically. , to the tube axis direction from the body portion inner surface of the guide blade roots
The width, narrow at the top, drain pipe connecting socket, characterized in that is has wide wants toward the bottom. 2. The drainage pipe connecting socket according to claim 1, wherein a plurality of the guide vanes are provided at different positions along the circumferential direction of the inner surface of the main body. 3. The socket for connecting a drainage pipe according to claim 1, wherein the main body and the blade are integrally formed of synthetic resin.