JP2571637B2 - Drainage pipe silencer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a drainage pipe silencer in a multi-story building.

(Prior Art) Conventionally, there is an example shown in FIG. 6 as a drainage pipe in a high-rise building such as an apartment. This pipe is a collecting pipe c to which the flush toilet a of each floor is connected via a horizontal drainage branch pipe b.
And a straight upright pipe d connecting the collecting pipes c of each floor, and a curved pipe f connecting the lowermost collecting pipe c and the horizontal drainage pipe e therebelow.
And The solid waste discharged together with the washing wastewater from the flush toilet a is discharged to the sewage via the horizontal drainage branch pipe b, the collecting pipe c, the standing pipe d, the curved pipe f, and the horizontal drainage pipe e.

In the above drainage pipe, the drainage discharged from the lower one or two layers does not cause a noise problem,
When the solid waste in the drainage discharged from the higher floor collides with the curved pipe f, a considerable noise is generated. For example, the impact noise of the solid waste in the wastewater discharged from the 10th floor shown in FIG. 6 colliding with the curved pipe f is as loud as a peak value of about 80 horns, and this noise countermeasure was required.

Therefore, it has been attempted to reduce the noise by reducing the falling speed of filth, etc. by using all the collecting pipes c as bladed collecting pipes having blades for swirling downflow drainage on the inner periphery of the pipes ( For example, see JP-B-62-50717).

(Problems to be Solved by the Invention) However, the above-described configuration in which the collecting pipes with the wings each having a complicated structure are interposed for each layer has a problem that the entire manufacturing cost is considerably high.

The present invention has been made in view of the above situation, and an object of the present invention is to provide an inexpensive drain pipe silencer capable of reducing noise.

(Means for Solving the Problems) In order to achieve the above-mentioned object, a silencer for drainage pipes according to claim 1 of the present invention includes a plurality of lateral drainage branch pipes 2 on each floor of a multi-story building. Collecting pipes 3 and 6 and multiple standing pipes 4
Are alternately connected, and the lower end of the collecting pipe 6 is connected to the horizontal drain pipe 8 via the curved pipe 7 in the drain pipe. A substantially vertical bent pipe 5 is provided between the pipe 3 and the vertical section inclining from the vertical direction so that the middle part in the vertical direction is deviated in the horizontal direction more than the inner diameter of the pipe with respect to the upper and lower ends. The inclination angle of the tube 5 is
It is characterized in that the inclination angle at the location where the solid waste falls and collides substantially at the center of the lowermost collecting pipe 6 on the inner surface of the curved pipe 7 is set smaller.

The drain pipe silencer according to claim 2, wherein the lowermost collecting pipe 6 is connected to the collecting pipe 3 on the upper floor by the bent vertical pipe 5.
And a straight standing pipe 4 are sequentially connected.

The drain pipe silencer according to claim 3, further comprising a blade (10) for allowing the lowermost collecting pipe (6) to swirl the drainage water flowing down the inner circumference of the pipe.
Is provided in a partial region in the circumferential direction, and the bent vertical pipe 5 is provided such that a vertical intermediate portion is deviated in a direction opposite to the blade 10 with the pipe axis of the lowermost collecting pipe 6 interposed therebetween. It is characterized by:

The drainage pipe silencer according to claim 4 is characterized in that the bent upright pipe 5 is further provided such that an intermediate portion in the vertical direction is deviated in the same direction as the bending direction of the bent pipe 7.

(Operation) In the drain pipe silencer according to claim 1, the solid waste in the drainage that falls from the upper floor through the collecting pipe 3 and the standing pipe 4 is applied to the inclined inner wall surface when passing through the bent standing pipe 5. Contact and deceleration. At this time, since the bent vertical pipe 5 has a shape in which the middle part in the vertical direction is deviated in the horizontal direction more than the inner diameter of the pipe,
Even if the solid waste falls from the center of the pipe from above, the above-described deceleration occurs because the solid waste always contacts the inner wall surface of the bent vertical pipe 5. After that, the solid waste falls through the lowermost collecting pipe 6 to the curved pipe 7. During this time, even if the solid waste falls freely, the distance is short. It collides with the curved tube 7 at a lower speed. As a result, the impact sound generated due to the collision of the solid waste with the curved pipe 7 is reduced. On the other hand, since the angle of the bent vertical pipe 5 is set to be at least smaller than that of the bent pipe 7, the sound generated when the solid waste collides with the bent vertical pipe 5 can be suppressed to be small. As a result, with a simple configuration in which the above-described bent standing pipe 5 is interposed at the lowermost layer, noise can be more reliably reduced, and, for example, compared to a configuration in which a collecting pipe with blades is interposed on each floor. In addition, the overall manufacturing cost can be reduced.

In the silencer for drainage pipes according to the second aspect, the bent standing pipe 5 is cut into an appropriate length between the lowermost collecting pipe 6 and the upper collecting pipe 3. Straight pipe 4
The bent standing pipe 5 has a small shape whose length is as short as possible irrespective of the distance between the lowermost collecting pipe 6 and the upper collecting pipe 3. Things. Accordingly, the specially-designed bent upright 5 in which the intermediate portion is deviated can also be manufactured at a lower cost, whereby the overall piping cost can be further reduced.

According to the third aspect of the present invention, the solid waste deflected and slid down through the bent vertical pipe 5 strikes the blades 10 of the collecting pipe 6 and is dispersed and falls into the curved pipe 7. Therefore, it is possible to further reduce the impact sound. Also in this case, one drainage pipe system and one bent pipe 5 only need to be provided in one drainage pipe system, and the piping cost can be reduced.

In the silencer for drainage pipes according to the fourth aspect, the solid waste after passing the bent uprights 5 strikes the inner wall surface of the lowermost collecting pipe 6 on the opposite side to the direction of deflection of the bent uprights 5. After dropping downward, it is sent to the horizontal drain pipe along the inner wall surface of the curved pipe 7 that curves from the vertical direction to the horizontal direction. During this time, the falling speed of the solid waste in the vertical direction gradually decreases on the inner wall surface of the curved pipe 7, whereby the noise generated due to the falling of the solid waste can be further reduced.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is a flush toilet provided on each floor, 2
Is a horizontal drain branch pipe, 3 is a collecting pipe, and the flush toilet 1 is a horizontal drain branch pipe 2.
Are connected to each other. Reference numeral 4 denotes a straight standing pipe, which connects the collecting pipes 3 on each floor.

5 is a bent standing pipe, 6 is a lowermost collecting pipe, 7 is a curved pipe, and 8 is a horizontal drain pipe, which are sequentially connected.

The collecting pipe 3 is conventionally used without a blade.

A ventilation pipe 9 is connected to an upper end of the uppermost standing pipe 4.

As shown in FIG. 5, the bent standpipe 5 has a vertically joined portion.
The space between 5a and 5b is bent in a V shape, and is deviated laterally with respect to the vertical axis. In this embodiment, for the upper and lower ends,
The middle part in the vertical direction which is most deviated in the lateral direction is deviated in the lateral direction by substantially the inner diameter of the pipe.

As shown in FIGS. 2 to 4, the lowermost collecting pipe 6 has a large diameter portion 6c between the upper and lower connecting portions 6a and 6b, and a tapered portion 6d is formed below the large diameter portion 6c. And the tapered portion 6d
The blades 10 are protruded from the inner peripheral surface to the upper side. Incidentally, the amount of projection of the blade 10, as shown in FIG. 3, preferably standpipe 4 internal diameter 88% of the diameter D ₁ of the sphere 11 in D is in the range to pass. A connecting portion 6e for connecting to the horizontal drainage branch pipe 2 is provided in the middle of the large-diameter portion 6c of the collecting pipe 6, and an inner peripheral surface of the connecting portion 6e except for the lower portion has a bent vertical pipe 5c. There is provided a water guide plate 6f for guiding the drainage from the lower side and preventing the water from flowing back to the horizontal drain branch pipe 2.

The drain angle θ of the blade 10 can be set to 15 to 40 degrees,
Around 30 degrees is optimal.

When connecting the bent standing pipe 5 to the collecting pipe 6, the bent part in the middle is displaced in a direction opposite to the blade 10 of the collecting pipe 6, and as described later, the solid contaminants and the like are separated by the blade. It is preferable to hit 10.

In the above embodiment, a pseudo solid was put together with drainage from the flush toilet 1 on the top floor, and a test was conducted. The falling speed differs between solid waste and drainage due to air resistance. Falls down, hits the inner wall surface of the bent vertical pipe 5, is decelerated, deflects and slides down, hits the blades 10 of the collecting pipe 6, disperses and turns, descends along the pipe wall, It reaches the horizontal drainage pipe 8 along the inner wall surface of the curved pipe 7. On the other hand, the drainage spreads over the entire cross section of the standing pipe 4 and the collecting pipe 3, falls, is deflected by the bent standing pipe 5, and
While being swirled, the solid waste is swirled along the inner surface of the pipe wall through the curved pipe 7 to reach the horizontal drain pipe 8, and is discharged into the sewage. The loudness of the impact sound of solid waste is 67 horns at the peak,
The noise was greatly reduced compared to the horn.

The amount of lateral deflection in the bent upright 5 is preferably large for solid waste, but if the amount of lateral deflection is too large relative to the length of the bent upright 5, the inclination becomes steep. become. In this case, noise may be generated when the solid waste hits the bent vertical pipe 5. Therefore, it is necessary to prevent the solid waste from being louder than the collision sound at the curved pipe 7. Therefore, it is necessary to satisfy at least the following conditions with respect to the inclination angle from the vertical direction of the pipe axis from the upper joint portion 5a to the intermediate portion in the bent standing pipe 5. That is, when the solid waste falls almost at the center of the lowermost collecting pipe 6 and collides with the curved pipe 7, the inclination angle of the bent vertical pipe 5 is larger than the inclination angle of the inner surface of the curved pipe 7 at the collision point. It is small. For example, in FIG. 1, the inclination angle of the bent pipe 7 from the vertical direction at the point where the extension line below the pipe axis of the lowermost collecting pipe 6 intersects the bent pipe 7 is about 45 °. On the other hand, the inclination angle of the bent vertical pipe 5 shown in FIG. 5 from the vertical direction is about 10 °.

As described above, in the above embodiment, the falling solid waste is decelerated by contacting the inner wall surface of the bent upright 5 before colliding with the bent pipe 7. Thereby, the impact sound when the solid waste collides with the curved pipe 7 can be reduced.
Furthermore, the impact noise can be further reduced by causing the solid waste deflected and slid down through the bent vertical pipe 5 to impinge on the blades 10 of the collecting pipe 6 to be dispersed and fall into the bent pipe 7. And the accumulation of solid waste can be prevented. Also in this case, one drainage pipe system and one bent pipe 5 only need to be provided in one drainage pipe system, and the piping cost can be reduced.

Further, in the above-described embodiment, as shown in FIG. 1, the bent straight pipe 5 is provided between the lowermost collecting pipe 6 and the collecting pipe 3 on the floor above the conventional straight rising pipe 4. It is interposed in combination with. That is, the lowermost-layer collecting pipe 6 and the upper-layer collecting pipe 3 are connected by the bent vertical pipe 5 and the straight vertical pipe 4 cut to an appropriate length. With such a configuration, the bent standing pipe 5 can have a small shape whose length is as short as possible irrespective of the distance between the lowermost collecting pipe 6 and the upper collecting pipe 3. Can, therefore,
The bent tube 5 with a special specification in which the intermediate portion is deviated can also be manufactured at lower cost. This also results in lower overall piping costs.

On the other hand, as described above, the bent vertical pipe 5 is connected so that the direction of deflection of the intermediate portion is opposite to the direction of the blades 10 of the collecting pipe 6, but is further shown in FIG. As described above, it is preferable that the pipes 7 are connected so that the deflection direction is the same as the bending direction of the bending pipe 7.

With such a relationship, the solid waste after passing through the bent upright 5 hits the inner wall surface of the lowermost collecting pipe 6 opposite to the direction of the deflection of the bent upright 5 and falls downward. ,afterwards,
The water is sent to the horizontal drain pipe along the inner wall surface of the curved pipe 7 that curves from the vertical direction to the horizontal direction. During this time,
The falling speed of the solid waste in the vertical direction gradually decreases on the inner wall surface of the curved pipe 7, whereby the noise generated due to the falling of the solid waste can be further reduced.

The present invention is not limited to the above-described embodiment. For example, the present invention can be applied to drainage pipes such as sewage and miscellaneous drainage other than flush toilets, and the winged collecting pipe 6 has another shape and structure. You may.

(Effect of the Invention) As described above, in the silencer for drainage pipes according to claim 1 of the present invention, solid waste that has fallen between the lowermost collecting pipe and the collecting pipe on the floor above it is inevitable. A bent vertical pipe that is in contact with and that is shaped to suppress the generation of sound at the time of the collision is interposed, so that the speed of collision with the bent pipe is reduced, and therefore, solid waste may fall. The accompanying noise is reduced. As a result, noise can be reduced with a simple structure in which the above-described bent standing pipe is interposed in the lowermost layer, and the overall manufacturing cost is reduced as compared with, for example, a structure in which a collecting pipe with blades is interposed on each floor. Can be made cheaper.

In the silencer for drainage pipes according to the second aspect, the bent standing pipe is interposed between the lowermost collecting pipe and the collecting pipe on the upper floor in combination with a conventional straight rising pipe. Therefore, the bent standpipe can be of a small shape whose length is shortened as much as possible irrespective of the interval between the collecting pipes. It can be manufactured at low cost. This further reduces the overall piping cost.

In the silencer for drainage pipes according to claim 3, since the deflection direction of the bent standing pipe is configured to face the opposite side to the blade of the collecting pipe, the solid waste deflected and slipped down through the bent standing pipe is as described above. The blades also strike and disperse and fall into a curved tube, which makes it possible to further reduce the impact sound. Even in this case, it is sufficient that one drainage pipe system has one bladed collecting pipe and one bent standing pipe, and the piping cost can be reduced.

In the silencing device for drainage pipes according to claim 4, since the deflection direction of the bent riser is configured to be in the same direction as the bending direction of the bent pipe, the lowermost collecting pipe after passing through the bent riser is constructed. The solid waste falling downward against the wall is sent to the horizontal drain along the curved inner wall of the curved pipe. During this time, the falling speed of the solid waste in the vertical direction gradually decreases on the inner wall surface of the curved pipe, thereby making it possible to further reduce the noise generated by the falling of the solid waste.

[Brief description of the drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a schematic diagram of a drainage piping system, FIG. 2 is a central longitudinal sectional view of a collecting pipe with blades, and FIG. FIG. 4 is a longitudinal sectional view of a main part showing a blade shape in a collecting pipe with blades, FIG. 5 is an enlarged sectional view of a bent standing pipe, and FIG. 6 is a configuration diagram of a conventional drainage piping system. 2 ... Horizontal drainage branch pipe, 3 ... Collecting pipe, 4 ... Standing pipe, 5 ...
Bent standing pipe, 6 ... Lowermost collecting pipe, 7 ... Curved pipe, 8 ...
Horizontal drain pipe, 10 ... feather.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Iwaharu Nagodaira 1-2-1 Minamienkajima, Taisho-ku, Osaka-shi, Osaka Inside Kubota Enkajima Plant (72) Inventor Hiroki Takishita Taisho, Osaka-shi, Osaka 7-22, Minami-Onka-jima, Ku-ku Inside Kubota-Onkajima Plant (56) References JP-A-63-297633 (JP, A) JP-A-61-31539 (JP, A) JP-A-2-261136 (JP, A) Actually open sho 61-50163 (JP, U)

Claims (4)

(57) [Claims] 1. A plurality of collecting pipes (3) and (6) to which horizontal drainage branch pipes (2) on each floor of a multi-story building are connected, and a plurality of standing pipes (4) are alternately connected. At the same time, in the drainage pipe in which the lower end of the lowermost collecting pipe (6) is connected to the horizontal drainage pipe (8) through the curved pipe (7), the lowermost collecting pipe (6) and the floor above it are connected. A substantially vertical bent pipe (5) is provided between the pipe and the collecting pipe (3) so that the middle part in the vertical direction is deviated from the upper and lower ends in the horizontal direction more than the inner diameter of the pipe by being inclined from the vertical direction. The angle of inclination of the bent vertical pipe (5) is smaller than the angle of inclination at a location where solid waste falls and collides substantially at the center of the lowermost collecting pipe (6) on the inner surface of the curved pipe (7). A drain pipe silencer characterized by being set. 2. The lowermost collecting pipe (6) is connected to the upper collecting pipe (3) by the bent standing pipe (5) and the straight standing pipe (4).
2. The muffler for drainage pipes according to claim 1, wherein the muffler is connected to the drainage pipe sequentially. 3. The lowermost collecting pipe (6) has a blade (10) for swirling downflow drainage to the inner circumference of the pipe in a part of the circumferential direction, and the bent standing pipe (5) is provided in the lowermost layer. 3. The silence of a drainage pipe according to claim 1 or 2, wherein a vertical intermediate portion is provided so as to be deviated in a direction opposite to the blade (10) across the pipe axis of the collecting pipe (6). apparatus. 4. The bent vertical pipe (5) is provided such that an intermediate portion in the vertical direction is deviated in the same direction as the bending direction of the bent pipe (7). Or the silencing device for drainage pipes according to 3.