JPH094002A - Horizontal drainage pipe - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To reliably and easily eliminate the foam plug phenomenon and prevent the breakage of sealing water due to abnormal pressurization. SOLUTION: A defoaming shower means 7 is provided at an appropriate position of a horizontal main pipe 5 connected to a lower end of a drainage vertical pipe 1, and when the pressure detected by a pipe internal pressure detection sensor 12 exceeds a set value, shower is performed inside the pipe. Turn off the bubbles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage horizontal main pipe which constitutes a part of drainage equipment for buildings such as middle and high-rise houses.

[0002]

2. Description of the Related Art Generally, drainage pipes provided in a multi-layered building are provided with horizontal branch pipes connected to drainage devices such as toilets of each floor, a collecting pipe to which each horizontal branch pipe is connected, and One-pipe type with a drainage vertical pipe that connects the collecting pipes vertically to form a straight line, and a drainage horizontal main pipe that is connected to the lower end of the lowermost collecting pipe (or vertical pipe) through leg bend pipes, etc. It is constructed and the drainage is designed to be discharged through the parlor basin.

When washing water is drained, the drainage is swirled and flows down along the inner surface of the pipe, so that bubbles due to the detergent fill the horizontal main pipe, and the bubbles block the inside of the horizontal main pipe. Bubble plug phenomenon occurs. When this bubble plug phenomenon occurs, the air flowing down along with the drainage in the drain pipe may stay in the bubble plug portion, and the pressure in the upstream pipe may be abnormally increased.

When an abnormal pressurization occurs in the drain pipe, the pressure in the horizontal branch pipe connected to the drain pipe is also increased, and the seal breakage occurs at the toilet bowl connected to the horizontal branch pipe, the trap portion of the sink, etc. It may cause water spouting and foul odors. Therefore, the applicant has already provided a ventilation pipe for bypassing a portion where a foam plug phenomenon is expected to occur with respect to the horizontal main pipe, and an air flow generator is provided in the ventilation pipe to follow the drainage flow. A technique has been proposed in which a forced air flow is generated so as to suck and remove a foam plug (see Japanese Patent Application No. 62-80710).

[0005]

By the way, in the above-mentioned prior art, the foam plug phenomenon occurring in the drainage horizontal main pipe is more upstream than the upstream end of the bypass ventilation pipe,
When it occurs in a long distance region, a circulating flow of air passing through the bypass ventilation pipe and the horizontal main pipe occurs only on the downstream side of this region, and the bubble plug phenomenon cannot be eliminated.

Further, since wastewater flows through the bypass ventilation pipe, it is necessary to frequently perform maintenance for keeping the airflow generator clean. The present invention has been made in view of the above-described circumstances, and an object thereof is to eliminate a plug phenomenon reliably and easily, and to prevent lateral water discharge by abnormal pressurization. In providing the main pipe.

[0007]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, the present invention is characterized in that the defoaming shower means is provided at an appropriate position of the horizontal main pipe connected to the lower end of the drainage vertical pipe (claim 1). In this case, when showering is carried out in the horizontal main pipe by the shower means arranged in the place where the bubble plug phenomenon of the drain main pipe is likely to occur, the bubbles disappear by the shower water, and the bubble plug phenomenon in the horizontal pipe can be eliminated.

Further, the present invention is characterized in that the shower water discharged by the shower means forms a water film on the inner surface of the horizontal main pipe, so that the contact resistance on the inner surface of the horizontal water pipe becomes small. The bubbles do not adhere to the inner surface of the horizontal main pipe and flow down together with the drainage (claim 2). Further, the present invention is characterized in that the shower water is discharged by the shower means in the drainage downward direction and / or the circumferential direction, so that a water film is easily formed on the inner surface of the horizontal main pipe, and the shower water is also formed. Forcibly push the bubbles down the drainage (Claim 3).

Further, according to the present invention, the shower means is
Since it is characterized in that a plurality of locations are provided on the upper side of the horizontal main pipe and in the axial direction of the pipe, shower water can be sprayed at a plurality of positions in the axial direction of the horizontal main pipe, and bubbles can be surely eliminated or flowed down. (Claim 4). Further, the present invention is characterized in that the frictional resistance of the inner surface of the horizontal main pipe connected to the lower end of the drainage vertical pipe is reduced to facilitate the movement of bubbles (Claim 5).

In this case, since the frictional resistance of the inner surface of the horizontal main pipe is small, the bubbles in the horizontal main pipe move in the downstream direction by the internal pressure of the pipe before the internal pressure of the pipe reaches the pressure causing the breakage of the sealing water. Therefore, the bubble plug phenomenon can be eliminated.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention,
Reference numeral 1 is a drainage vertical pipe, 2 is a bottommost drainage collecting pipe, the lower end of the vertical pipe 1 is connected to the upper end of the drainage collecting pipe, and a leg bent pipe 3 is connected to the lower end of the vertical pipe. 4 is connected.

A drainage horizontal main pipe 5 is connected to a lower end portion of the bent pipe 3, and a chamber rod 6 is provided at a downstream end of the horizontal main pipe 5.
Is connected. A defoaming shower means 7 is provided at a place where the foam plug phenomenon of the horizontal main pipe 5 easily occurs. The shower means 7 has a shower head 9 having a large number of water spray holes 13 in a tip stopper 9A fitted and fixed in a mounting hole 8 provided on the upper side of the horizontal main pipe 5, and an electromagnetic opening / closing valve 10 at the upper end of the head 9. It is composed of a shower water supply pipe 11 and a pressure sensor 12 provided upstream of the shower head 9 in the horizontal main pipe 5.

The output of the pressure sensor 12 is input to the electromagnetic on-off valve 10, and when the detected pressure in the horizontal main pipe 5 reaches a set pressure (pressure that does not cause breakage of sealing water), the electromagnetic on-off valve 10 opens. Sprinkle water from the shower head 9,
When the pressure falls below a predetermined pressure, the electromagnetic opening / closing valve 10 is closed to stop the shower. That is, when the bubbles in the horizontal main pipe 5 disappear, the shower automatically stops.

The shower head 9 may be arranged at a plurality of locations as shown in FIG. 3 so that showers can be performed simultaneously. 4 and 5 show a second embodiment of the present invention, which differs from the first embodiment in that
The front end stopper 9A of the shower head 9 is projectingly inserted into the horizontal main pipe 5, and a large number of water spray holes 13A are provided on the peripheral wall of the shower head near the upper side of the stopper 9A. This is the point provided so as to form the film 14.

According to the second embodiment, since the inner surface of the horizontal main pipe 5 is covered with the water film 14, the contact resistance becomes small,
Bubbles do not adhere to and remain on the inner surface of the horizontal main pipe 5, flow toward the parlor 6 along with the drainage, and disappear during the flow. And the shower head 9 of the second embodiment
Is disposed on the upstream side and / or the downstream side of the shower head 9 of the first embodiment, the defoaming effect can be enhanced.

FIG. 6 shows a third embodiment of the present invention,
The water spouting hole 13 was provided in the tip stopper 9A of the shower head 9, and the water spouting hole 13 for forming the water film 14 on the inner surface of the horizontal main pipe 5 was provided in the peripheral wall of the shower head 9 near the stopper 9A as in the second embodiment. The point is that the shower water is directly applied to the bubbles in the horizontal main pipe 5 to defoam, and the water film covering the inner surface of the horizontal main pipe 5 causes the bubbles to flow down together with the drainage without adhering to and staying on the inner surface of the horizontal main pipe 5. It is possible to further enhance the defoaming effect.

FIG. 7 shows a fourth embodiment of the present invention,
The difference from the second embodiment is that among the water spray holes 13A provided in the peripheral wall in the vicinity of the stopper 9A of the shower head 9, the drainage upstream side is eliminated, and a water spray downstream side is provided with a water spraying hole 13B for spraying diagonally downward. The point is that bubbles in the main pipe 5 are positively pushed down by the shower water toward the downstream side and are erased.

Therefore, according to the fourth embodiment, even if the flow rate of drainage in the horizontal main pipe 5 is small and there is not enough flow rate for the bubbles, the bubbles can be made to flow downstream, as shown in FIG. In addition, by providing a plurality of shower heads 9 in the axial direction of the horizontal main pipe 5, the effect can be further enhanced. FIG. 8 shows a fifth embodiment of the present invention, in which the frictional resistance of the inner surface of the drainage horizontal main pipe 5 is smaller than the pressure at which the water sealing portion 4A of the lateral branch pipe 4 is broken to seal water. , Sufficiently small so that bubbles in the horizontal main pipe 5 can easily move. Since the structure of the drainage pipe is the same as that of the first invention, the same reference numerals as those in FIG.

Therefore, according to the embodiment of the second invention,
The bubbles in the horizontal main pipe 5 are swept away by the pressure in the pipes and discharged to the chamber basin 6 until the bubble plug phenomenon occurs, and the pressure in the pipes drops below the set pressure, and smooth drainage is performed. The above-mentioned first invention is not limited to the embodiments, and can be modified in design as appropriate.

[0020]

As described above, the present invention is characterized in that the defoaming shower means is provided at an appropriate position of the horizontal main pipe connected to the lower end of the drainage vertical pipe, and therefore, bubbles are generated by shower water. Is surely erased, and the bubble plug phenomenon does not occur,
It is possible to prevent breakage of sealing water due to abnormal pressurization and easy maintenance (claim 1).

According to the second aspect of the present invention, the shower water discharged by the shower means forms a water film on the inner surface of the horizontal main pipe. It becomes easy, and bubbles can flow down together with the drainage without adhering to the inner surface of the horizontal main pipe, and the bubble plug phenomenon can be prevented. Claim 3
According to the invention described above, the shower water is discharged by the shower means in the drainage downward direction and / or the circumferential direction. Therefore, a water film is easily formed on the inner surface of the horizontal main pipe. The shower water forcibly pushes the bubbles down the drainage, and the foam plug phenomenon can be prevented even when the drainage flow rate is small.

Further, according to the invention as set forth in claim 4, since the shower means is provided at a plurality of places on the upper side of the horizontal main pipe and in the axial direction of the pipe, the bubbles in the horizontal main pipe are prevented. It can be surely erased or allowed to flow down, and the foam plug phenomenon can be prevented more reliably. The invention according to claim 5 reduces the frictional resistance of the inner surface of the horizontal main pipe connected to the lower end of the drainage vertical pipe,
Since it is characterized by making it easy to move bubbles, it does not cause a bubble plug phenomenon, its structure is extremely simple and maintenance is easy. can do.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part of the same embodiment.

FIG. 3 is a configuration diagram showing an example in which shower means is arranged at a plurality of places in the same embodiment.

FIG. 4 is a sectional view of an essential part of a second embodiment of the present invention.

5 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 6 is a transverse cross-sectional view showing the main parts of a third embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view showing the main parts of a fourth embodiment of the present invention.

FIG. 8 is a configuration diagram showing a main part of a fifth embodiment of the present invention.

[Explanation of symbols]

 1 Drainage Vertical Pipe 5 Drainage Horizontal Main Pipe 7 Shower Means 9 Shower Head

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigekatsu Hisai 7-22, Minamienkajima, Taisho-ku, Osaka City, Osaka Prefecture Kubota Enkajima Plant

Claims (5)

[Claims] 1. A drainage horizontal main pipe, characterized in that shower means for defoaming is provided at an appropriate position of the horizontal main pipe connected to the lower end of the drainage vertical pipe. 2. The drainage horizontal main pipe according to claim 1, wherein the shower water discharged by the shower means forms a water film on the inner surface of the horizontal main pipe. 3. Shower water by the shower means,
The drainage horizontal main pipe according to claim 1 or 2, wherein the drainage is discharged in a downflow direction and / or a circumferential direction. 4. The horizontal drain main pipe according to claim 1, wherein the shower means is provided at a plurality of positions on the upper side of the horizontal main pipe and in the axial direction of the pipe. 5. A horizontal drainage main pipe, characterized in that the frictional resistance of the inner surface of the horizontal main pipe connected to the lower end of the vertical drainage pipe is reduced to facilitate the movement of bubbles.