JP2003065279A - Pump tank and sewage purifying tank with pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pump tank and a sewage purifying tank which can prevent odor from entering a house without increasing pressure in the pump tank or the sewage purifying tank without installing an odor pipe. SOLUTION: In a pump tank comprising a tank body (pump tank external tank) 2, an underwater pump 4 provided within the tank body 2 and a liquid feeding pipe 7 connected to the underwater pump 4 and extending through an upper part within the tank body 2 to the outside of the tank, a ventilating valve 9 is provided at the pump tank 1 at a level not soaking in the liquid in the tank of the liquid feeding pipe 7 passing through the upper part in the tank body 2 so that it is 'closed' when the underwater pump 4 is operating and 'opened' when the underwater pump 4 is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for relaying domestic wastewater (sewage) discharged from homes and apartments, organic industrial wastewater, or treated water from a septic tank by an underwater pump or the like. The present invention relates to a pump tank or a septic tank with a pump tank incorporating the pump tank.

[0002]

2. Description of the Related Art When treating treated water from households or apartments in a septic tank and temporarily storing it and sending it to a gutter, or when it is stored and sent to the septic tank before being treated in the septic tank. , A pump tank with a built-in submersible pump is often used. Such a pump tank is particularly necessary when the liquid transfer destination is a long distance and an appropriate water gradient cannot be obtained, or when the liquid transfer destination is at a high position and has an inverse gradient. FIG. 6 is an example of a conventional septic tank with a pump tank, in which a pump tank 24 is installed downstream of the septic tank 21. The pump tank 24 has a manhole 3 that serves as an inspection port.
Equipped with one or more submersible pumps 4, high water level sensor 5
And the low water level sensor 6 control the operation of the submersible pump 4, and a check valve 8 is provided in the middle of the liquid supply pipe 7.
Prevents backflow due to siphon phenomenon.

[0003]

However, the structure of such a septic tank with a pump tank is usually a structure in which the odor (air) generated in the septic tank or the pump tank is not directly discharged to the outside of the tank. Therefore, when the pressure in the septic tank and pump tank increases, the sealing water of the drain trap provided in the drainage section is broken,
The odor will enter the house. As one of the preventive measures, there is a method of providing an odorous pipe in a septic tank or a pump tank and releasing pressure (that is, odor) on the roof of a house or the like, but this method is detrimental to aesthetics. An object of the present invention is to provide a pump tank and a pump that do not increase the pressure in the pump tank (or the pressure in the septic tank) without installing an odorous pipe, and thus can prevent odors from entering the house. It is to provide a septic tank with a tank.

[0004]

In order to achieve the above object, the present invention has the following constitution. That is, the pump tank of the present invention includes a tank body (pump tank outer tank) 2 and the tank body 2
In a pump tank comprising an underwater pump 4 provided inside and a liquid feed pipe 7 connected to the submersible pump 4 and extending outside the tank through an upper part inside the tank body 2, The pump tank 1 is provided with a ventilation valve 9 that is “closed” while the submersible pump 4 is operating and “open” when the submersible pump 4 is stopped, at a height of the liquid supply pipe 7 that does not submerge in the tank liquid.

Here, the submersible pump 4 is connected to the liquid delivery pipe 7.
It is preferable to further provide the check valve 8 between the ventilation valve 9 and the ventilation valve 9. Further, on the upper part of the tank body 2, a manhole 3 which a person can normally enter and leave for maintenance and inspection, and a lid 3a which can seal the manhole are provided.

The present invention also relates to a septic tank with a pump tank, in which the pump tank 1 is arranged downstream of the septic tank 21.

[0007]

The vent valve 9 provided in the middle of the liquid feeding pipe 7 (in the gas phase portion in the pump tank) is in an open state (communication with the outside air) while the submersible pump 4 is stopped, so that the pressure in the pump tank is reduced. Does not increase. Further, while the submersible pump 4 is in operation, it is not in an open state (not directly communicating with the outside air), but the liquid in the pump tank is sent out of the tank by the submersible pump 4 (destination), The pressure in the pump tank does not rise and the water trap in the drain trap does not break.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below with reference to the accompanying drawings. FIG. 1 shows a pump tank as an example of the present invention. The pump tank 1 includes two submersible pumps 4 in a tank body (pump tank outer tank) 2 for temporarily storing sewage or treated water.
(4a, 4b) are arranged, and the submersible pump 4 (4a, 4b)
4b) has a liquid delivery pipe 7 for drawing out treated water from the tank body 2
A ventilation valve 9 for releasing odor is provided in the upper part of the pump tank in the middle of the piping through the upper part of the inside toward the liquid delivery destination outside the tank. Further, a backflow prevention valve 8 is provided on the front side (submersible pump side) of the ventilation valve 9.
Further, a manhole 3 and a lid 3a thereof are provided on the upper part of the tank body 2 as an inspection port for inspecting the inside and replacing parts.

FIG. 2 is an enlarged sectional view of the ventilation valve 9.
As shown in the figure, the liquid delivery pipe 7 from the submersible pump to the outside of the tank
The vent valve 9 is connected to the connection port (pipe) 12 provided in the upper part of the pump tank in the middle of the step. The ventilation valve 9 has a ventilation port 10 that is open toward the inside of the pump tank 1, and the check valve 1 that is closed when the submersible pump 4 is in operation and that is open when the submersible pump 4 is stopped is provided at the ventilation port 1.
1 is provided.

The opening and closing of the valve by the ventilation valve 9 will be described. The pump tank 1 is usually installed in the downstream of the purification tank 21 to which air is constantly sent from the blower 22 for aerobic treatment (see FIG. 4). The air from the blower 22 increases the pressure in the septic tank 21 and the pump tank 1, and the pressure raises the check valve 11 (opening the valve) as shown in FIG. 2 (A), and the odor (air) is sent. It goes out of the tank through the liquid pipe 7. on the other hand,
During operation of the submersible pump 4, as shown in FIG. 2 (B), the check valve 11 is pushed down by the water pressure of the submersible pump 4 (the valve is closed), and the treated water passes through the liquid sending pipe 7 to the outside of the tank. Be transferred. The flow of treated water at this time is shown by b.

The pipe diameter of the ventilation valve 9 is preferably equal to or larger than the pipe diameter of the liquid feeding pipe 7, and the diameter is preferably about 30 to 100 mm in order to reduce air resistance. Pump tank 1
Although one submersible pump 4 may be disposed inside, a plurality of submersible pumps 4 are preferably provided in consideration of a failure or the like. The check valve 8 on the front side (submersible pump side) of the ventilation valve 9 in the liquid supply pipe 7 is
If there is only one submersible pump 4 from the delivery destination and there is no backflow, it is not necessary to provide it.

FIG. 3 shows another example of the ventilation valve provided in the liquid supply pipe in the pump tank of the present invention. The ventilation valve 9 has a ventilation port 10 that is open inside the pump tank 1, and includes a check valve 11 and a liquid delivery pipe 7.
And a connection port (tube) 12 connected to the. The check valve 11 is normally lifted up (opened) by the pressure of air from the blower of the septic tank, and the odor (air) is transferred to the outside of the tank through the liquid sending pipe 7. When the submersible pump 4 is operating, the check valve 11 is pushed down (closed) by the water pressure of the submersible pump 4, and the treated water is transferred to the outside of the tank through the liquid supply pipe 7.

FIG. 4 shows an example of a septic tank with a pump tank (front view) in which the pump tank of the present invention is incorporated in the septic tank. There are various types of septic tanks used here,
In the case of FIG. 4, from the upstream, the first anaerobic treatment chamber (anaerobic filter bed first chamber) 25, the second anaerobic treatment chamber (anaerobic filter bed second chamber) 26, aerobic treatment tank 27, treatment Water tank 28 and disinfection tank 2
It is a septic tank equipped with 9. The pump tank 1 may be arranged integrally with the septic tank 21 as shown in FIG. 5, instead of being arranged separately as shown in FIG.

[0014]

The pump tank of the present invention can be incorporated into a septic tank. The septic tank with a pump tank of the present invention incorporating the above-mentioned pump tank prevents the rise of pressure in the tank and does not cause breakage of the sealing water of the drain trap without installing an odorous pipe, and the odor is inside the house. Prevent invasion. Further, since the odorous tube is not installed, the appearance can be maintained and the cost can be suppressed.

[Brief description of drawings]

FIG. 1 is a pump tank of an example of the present invention, (A) is a plan view,
(B) Front view.

FIG. 2 is an enlarged sectional view of the ventilation valve of FIG. (A) the vent valve is open, (B) the vent valve is closed.

FIG. 3 is an enlarged cross-sectional view of another example of a ventilation valve provided in a liquid supply pipe in a pump tank. (A) the vent valve is open, (B) the vent valve is closed.

FIG. 4 is a front view of a septic tank with a pump tank in which the pump tank of FIG. 1 is incorporated in the septic tank.

FIG. 5 is a front configuration diagram of a septic tank with a pump tank in which the pump tank is integrally incorporated.

FIG. 6 is a cross-sectional view of a conventional septic tank with a pump tank.

[Explanation of symbols]

1: Pump tank 2: Tank body (outer tank of pump tank) 3: Manhole 3a: Manhole cover 4, 4a, 4b: Submersible pump 5: High water level sensor 6: Low water level sensor 7: Liquid delivery pipe 8: Check valve 9: Vent valve 10: Vent 11: Check valve 12: Connection port (pipe) 21: Septic tank 22: Blower 23: Air bubbles 24: Pump tank 25: First anaerobic treatment chamber (anaerobic filter bed first chamber) 26: Second anaerobic treatment chamber (anaerobic filter bed second chamber) 27: Aerobic treatment tank 28: Treated water tank 29: Disinfection tank a: Air flow b: Treated water flow

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F04D 13/16 F04D 13/16 W Z 29/00 29/00 Z 29/44 29/44 D E F term (Reference) 2D063 DC04 3H022 AA01 BA07 CA48 DA04 DA06 DA20 3H034 AA01 AA13 BB01 BB12 CC07 DD12 DD20 DD28 EE04 EE12 EE15 4D027 AA14 AA20 AB14

Claims (3)

[Claims] 1. A pump tank comprising a tank body, a submersible pump provided in the tank body, and a liquid feed pipe connected to the submersible pump and extending outside the tank through an upper part of the tank body. A pump tank provided with a ventilation valve that is closed when the submersible pump is in operation and is open when the submersible pump is stopped, at a height such that the liquid supply pipe passing through the upper portion is not submerged in the tank liquid. 2. A liquid feeding pipe between the submersible pump and the ventilation valve,
The pump tank according to claim 1, further comprising a check valve. 3. A septic tank with a pump tank, wherein the pump tank according to claim 1 is arranged downstream of the septic tank.