JPH1082399A - Drainage transfer pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage transfer pump to intermittently pump up water by pneumatic work in a small purifying tank and with no check valve on a drainage inflow pipe. SOLUTION: This pump is furnished with a container 11 provided under a water level of a disposal tank to transfer drainage from the disposal tank with a small purifying tank 1 to another tank, an inflow pipe 12 through which drainage flows in the container 11 by hydraulic pressure, a exhaust pipe 13 to exhaust drainage from the container 11 by pneumatic pressure and an air pipe 14 to supply air to the container 11. In this case, an end part 13a of the container side of the exhaust pipe 13 is positioned below an end part 12a on the container side of the inflow pipe 12, air is continuously supplied from the air pipe 14, drainage flowing in is discharged to the end part 13a of the exhaust pipe 13, and when pneumatic pressure in the container 11 is released, drainage flows in.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a sewage transfer pump, and more particularly to a sewage transfer pump in a small septic tank.

[0002]

2. Description of the Related Art Usually, a small-sized septic tank for home use or the like is provided with an anaerobic treatment tank and an aerobic treatment tank. The sewage generated in homes and the like flows into the anaerobic treatment tank, where sewage storage and anaerobic treatment are performed in the anaerobic treatment tank. Next, the wastewater is pumped from the anaerobic treatment tank to the aerobic treatment tank for aerobic treatment. Is further sterilized and discharged.

In the case of the above-mentioned small-sized septic tank for home use or the like, the amount of generated sewage per hour varies greatly. In order to stabilize and improve water quality, it is necessary to keep the amount of sewage transferred from the anaerobic treatment tank to the aerobic treatment tank almost constant irrespective of fluctuations in the amount of generated sewage. In addition, a part of the aerobic treated water may be transferred to the anaerobic treatment tank for nitrogen removal,
At this time, a constant amount of water is required.

As a pump for transferring sewage from a treatment tank having a small-sized septic tank to another treatment tank, a container provided below the surface of the treatment tank and a check valve provided in the middle thereof allow sewage to flow into the container by water pressure. An inflow pipe, a discharge pipe for discharging sewage from the container by air pressure, and an air pipe provided with a small hole open to the atmosphere and intermittently supplying air to the container, the air pressure supplied to the container and a check valve There is a system in which sewage is discharged by closing, and sewage flows in by opening air pressure from a small hole and opening a check valve (Japanese Utility Model Laid-Open No. 3-35299, JP-A-7-6026).
No. 8).

[0005]

However, in the above-described transfer pump, when foreign matter or the like adheres to the check valve, pumping may be insufficient. In addition, the check valve made of plastic is made of metal because its operation is uncertain. Therefore, there is a demand for one without a check valve.

The present invention has been made in view of the above circumstances, and provides a sewage transfer pump for pumping water intermittently by air pressure in a small septic tank, wherein the sewage transfer pump has no check valve in the sewage inflow pipe. The purpose is to:

[0007]

In order to achieve the above-mentioned object, the present invention relates to a container provided below the surface of a treatment tank for transferring sewage from one treatment tank having a small septic tank to another treatment tank. , A sewage transfer pump having an inflow pipe through which sewage flows into a container by water pressure, a discharge pipe that discharges sewage from the container by air pressure, and an air pipe that supplies air to the container.
The container-side end of the discharge pipe is located below the container-side end of the inflow pipe, air is continuously supplied from the air pipe, the inflowing wastewater is discharged to the discharge pipe end, and the inside of the container is discharged. It is characterized in that sewage flows in when the air pressure is released.

According to the present invention, when sewage flows into the container due to water pressure, the end of the discharge pipe is closed by the sewage, so that communication between the inside of the container and the atmosphere is cut off. Sewage flows into the container until the water pressure and the air pressure balance. Since the air is continuously supplied into the container through the air pipe, the air pressure in the container increases, and the wastewater flowing into the container is discharged through the discharge pipe. When the wastewater in the container is discharged to the end of the discharge pipe, the inside of the container is communicated with the atmosphere, and the air pressure in the container is released. Then, the sewage flows into the container again due to the water pressure, and the above-described operation is repeated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a sewage transfer pump according to the present invention will be described below with reference to FIGS. FIG. 1 is a sectional view showing the entire configuration of a small septic tank provided with a sewage transfer pump. The small-sized septic tank 1 for home use or the like includes an anaerobic treatment tank 2 and an aerobic treatment tank 3. A sheath tube 4 is disposed in the anaerobic treatment tank 2, and an opening 4 a for taking in surface water in the anaerobic treatment tank 2 is provided above the sheath tube 4.

A sewage transfer pump 10 for transferring sewage from the anaerobic treatment tank 2 to the aerobic treatment tank 3 is provided in the sheath tube 4. The aerobic treatment tank 3 is provided with an air diffuser 6 for blowing air into the tank. A tank 7 is installed adjacent to the aerobic treatment tank 3.
The water subjected to the aerobic treatment is sent to the discharge unit 8. The tank 7 is also provided with a sewage transfer pump 10 so that a part of the water subjected to aerobic treatment for nitrogen removal can be transferred to the anaerobic treatment tank 2.

In the above configuration, the sewage is supplied to the anaerobic treatment tank 2
The sewage is stored in the anaerobic treatment tank 2 and anaerobic treatment is performed in the anaerobic treatment tank 2, and then transferred from the anaerobic treatment tank 2 to the aerobic treatment tank 3 by the sewage transfer pump 10 to perform aerobic treatment. The water subjected to the aerobic treatment in the aerobic treatment tank 3 is discharged from the discharge unit 8 through the tank 7. Since the amount of sewage flowing into the anaerobic treatment tank 2 varies with time, the water level of the anaerobic treatment tank 2 varies between a low water level and a high water level. In order to keep the amount of sewage transferred from the anaerobic treatment tank 2 to the aerobic treatment tank 3 irrespective of the fluctuation of the generated sewage amount, the sewage transfer pump 10 installed in the anaerobic treatment tank 2 has the following configuration. doing.

That is, the sewage transfer pump 10 includes a container 11 provided below the surface of the anaerobic treatment tank 2, an inflow pipe 12 through which sewage flows into the container 11 by water pressure, and a discharge for discharging sewage from the container 11 by air pressure. A pipe 13 and an air pipe 14 for supplying air to the container 11 are provided. The air pipe 14 is connected to a blower 15 that operates continuously, so that air is always supplied into the container 11. The air diffuser 6 is also connected to the blower 15 via an air pipe 16 so that air for diffusing is supplied into the aerobic treatment tank 3.

The container-side end 13a of the discharge pipe 13 opens into the container 11, and the container-side end 12a of the inflow pipe 12 also opens into the container 11. And the discharge pipe 1
The third end 13 a is located lower than the end 12 a of the inflow pipe 12. The other end 12b of the inflow pipe 12 is open at the lower part of the anaerobic treatment tank 2, and the other end 13b of the discharge pipe 13 is open near the water surface of the aerobic treatment tank 3.

In the above-described configuration, sewage flows into the container 11 by water pressure as shown in FIG. Container 11
When the sewage flows into the inside, the end 13a of the discharge pipe 13 is closed by the sewage, so that the communication between the inside of the container 11 and the atmosphere is cut off. Sewage flows into the container 11 until the water pressure and the air pressure are balanced. Since the air is continuously supplied into the container 11 through the air pipe 14, the air pressure in the container 11 increases, and the wastewater flowing into the container 11 is discharged through the discharge pipe 13.

As shown in FIG. 2B, when the waste water in the container 11 is discharged to the end 13a of the discharge pipe 13, the container 1
1 and the atmosphere are communicated, and the air pressure in the container 11 is released. Then, the sewage flows into the container 11 again by the water pressure, and the above-described operation is repeated. That is, according to the sewage transfer pump 10 of the present invention, the container 11
A constant amount of sewage can be transferred from the anaerobic treatment tank 2 to the aerobic treatment tank 3 only by continuous air supply to the tank. Since the sewage to be transferred itself performs a valve action, there is no need to provide a check valve in the inflow pipe 12.

FIG. 3 shows a modification of the present invention. In this modification, a concave portion 11a is formed at the bottom of the container 11, and an end portion 13a of the discharge pipe 13 is opened in the concave portion 11a. Therefore, when dirty water flows into the container 11 by water pressure, the end portion 13a of the discharge pipe 13 is quickly and reliably sealed with water. Other configurations are the same as those in the examples shown in FIGS.

FIG. 4 is a diagram showing another embodiment of the present invention. In this embodiment, the container, the inflow pipe and the outflow pipe are formed integrally. That is, the sewage transfer pump 10
Is a container 21 provided below the surface of the anaerobic treatment tank 2, an inflow pipe 22 through which sewage flows into the container 21 by water pressure, a discharge pipe 23 that discharges sewage from the container 21 by air pressure, and air into the container 21. And a supply air pipe 24.

The container-side end 23a of the discharge pipe 23 is
1 is connected to the lower end 21a of the
And the container 21 form a U-shaped tube. The container-side end 22a of the inflow pipe 22 is connected to the upper end 21b of the container 21.
And is formed in an inverted U-shape by the inflow pipe 22 and the container 21. End 23a of discharge pipe 23
Is located below the end 22 a of the inflow pipe 22.

The operation of this embodiment is the same as that of the embodiment shown in FIGS. According to the present embodiment, since the container 21, the inflow pipe 22, and the outflow pipe 23 can be constituted only by pipes, the structure becomes strong against repeated stress due to air pressure. Also, the pump capacity can be flexibly handled by appropriately changing the diameter and length of the pipe. Although the example in which the container 21, the inflow pipe 22, and the discharge pipe 23 are connected has been described, it goes without saying that the three can be integrally manufactured.

In FIG. 1, the sewage transfer pump 10 provided in the tank 7 has the same configuration as the sewage transfer pump shown in FIGS.
It is connected to the.

[0021]

As described above, according to the present invention,
Since there is no check valve in the inflow pipe of the sewage pump, troubles and maintenance caused by the check valve are eliminated. Further, according to the present invention, since the supply of air to the sewage pump is continuous, for example, it can be used also as a diffuser blower in the aerobic treatment tank, and the number of blowers is reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the overall configuration of a small septic tank provided with a sewage transfer pump according to the present invention.

FIG. 2 is an explanatory diagram illustrating the operation of the sewage transfer pump according to the present invention.

FIG. 3 is a sectional view showing a modified example of the sewage transfer pump according to the present invention.

FIG. 4 is a sectional view showing another embodiment of the sewage transfer pump according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Small septic tank 2 Anaerobic treatment tank 3 Aerobic treatment tank 4 Sheath pipe 6 Air diffuser 10 Sewage transfer pump 11,21 Container 12,22 Inflow pipe 13,23 Discharge pipe 14,24 Air pipe 15,25 Blower

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masataka Fukuoka 1-111-22 Matsushima-cho, Takamatsu-shi, Kagawa Prefecture Inside Shidenko Co., Ltd. (72) Inventor Shunsuke Uematsu 1-111-22 Matsushima-cho, Takamatsu-shi, Kagawa Prefecture Shidenko Co., Ltd. Inside

Claims (1)

[Claims] 1. A container provided below the surface of a treatment tank for transferring sewage from a treatment tank having a small septic tank to another treatment tank; an inflow pipe through which sewage flows into the container by water pressure; In a sewage transfer pump provided with a discharge pipe for discharging sewage from a container and an air pipe for supplying air to the container, the end of the discharge pipe on the container side is lower than the end of the inflow pipe on the container side, A sewage transfer pump, wherein air is continuously supplied from an air pipe, sewage flows in when inflow sewage is discharged to an end of a discharge pipe, and air pressure in a container is released.