JP2891285B2 - Vacuum type wastewater collection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum type sewage collecting apparatus having an air intake pipe protruding above the ground.

[0002]

2. Description of the Related Art Conventionally, a vacuum-type wastewater collecting apparatus has been used for collecting wastewater such as domestic wastewater. The vacuum type sewage collection device is, for example, as shown in FIG. 2, and guides sewage generated at a sewage generation source 1 such as a home to a public sewage basin 3 by a sewage inflow pipe 2 and is then installed underground. Into the vacuum valve box 4. Then, the sewage in the vacuum valve box 4 is collected through a vacuum valve suction pipe 5, a vacuum valve 6, a vacuum sewage pipe 7, and a vacuum sewer pipe 8 into a water collection tank (not shown) of a vacuum pumping station.
Pump to sewage treatment plant. The vacuum pump station is provided with a vacuum pump, and is configured to reduce the pressure inside the water collecting tank and the vacuum drain pipe 8.

As described above, the vacuum valve box 4 connects the sewage inflow pipe 2 and opens a vacuum valve suction pipe 5 communicating with a vacuum sewage pipe 7 via a vacuum valve 6 at the lower part of the box. I have. The vacuum valve 6 is connected to control means such as a vacuum valve controller 9 for controlling the opening and closing of the vacuum valve 6 and a sewage amount detection tube 10, whereby the amount of sewage detected by the sewage amount detection tube 10 is transmitted to the vacuum valve controller 9. The vacuum valve controller 9 controls the opening and closing of the vacuum valve 6. One end forms an air intake port 11a that opens to the ground, and the other end forms a vacuum valve box 4.
An air intake pipe 11 communicating with the inside of the air intake pipe 11 is provided.
1 is provided with an air pipe 12 connected to the vacuum valve 6 and the vacuum valve controller 9.

[0004] In the above configuration, with the vacuum valve 6 closed, the inside of the vacuum sewer pipe 7 is depressurized by the vacuum pump of the vacuum pump station, and the sewage discharged from the sewage source 1 is passed through the sewage inlet pipe 2. Flow into vacuum valve box 4.
When a certain amount of the inflowing sewage accumulates in the vacuum valve box 4, the water level rises and the air in the sewage amount detection pipe 10 is compressed, and this air pressure is transmitted to the vacuum valve controller 9 and reaches a certain air pressure. Then, the vacuum valve controller 9 is operated, and the vacuum valve 6 is opened. At this time, due to the differential pressure between the atmospheric pressure in the vacuum valve box 4 introduced from the air intake pipe 11 and the vacuum pressure in the vacuum sewer pipe 8, the sewage in the vacuum valve box 4 is sucked from the vacuum valve suction pipe 5. After passing through the vacuum valve 6 in the opened state, it flows to the vacuum sewage pipe 7 and the vacuum sewage pipe 8.

When the water level in the vacuum valve box 4 drops and air is sucked from the lower end of the vacuum valve suction pipe 5, this air passes through the vacuum valve 6 and flows into the vacuum sewage pipe 7 and the vacuum sewage pipe 8. ,
It is collected as a mixed flow with the previously sucked sewage in the collection tank of the vacuum pumping station. The sewage collected in the water collecting tank is sent to a sewage treatment plant and the like, and the air is discharged by a vacuum pump, and the water collecting tank is maintained at a constant vacuum.

[0006] The air pressure in the sewage detection pipe 10 decreases as the water level in the vacuum valve box 4 decreases. Even if this decrease in air pressure is transmitted to the vacuum valve controller 9, the vacuum valve 6 operates immediately. It does not close, but closes when a certain amount of air is sucked in from the vacuum valve suction pipe 5 and the gas-liquid ratio between air and sewage reaches a predetermined value. The above-described vacuum valve 6 and vacuum valve control means are well known, and are described, for example, in US Pat.
No. 8, etc. The air pipe 12 applies atmospheric pressure to the vacuum valve 6 and the vacuum valve controller 9.

[0007]

As described above, the air intake pipe in the vacuum type sewage collection apparatus is installed so as to protrude above the ground, but if there is no appropriate installation place near the vacuum valve box, the vacuum valve is used. It has to be installed in a place away from the basin, and the installation distance of the air intake pipe becomes longer. However, when the laying distance of the air intake pipe is long, the supply of air to the vacuum valve basin is delayed and a pressure drop occurs in the vacuum valve basin, and this negative pressure is transmitted to the upstream sewage generation source through the sewage inflow pipe, In a house or the like, there is a problem that the water level is lowered by acting on a water sealing trap of a sanitary device such as a toilet.

The present invention has been made to solve the above-mentioned problem, and enables the air to be quickly supplied to the vacuum valve box even when the laying distance of the air intake pipe is long, so that the negative pressure in the vacuum valve box flows upstream through the sewage inflow pipe. It is intended to prevent transmission to sewage sources.

[0009]

In order to solve the above-mentioned problems, a vacuum-type wastewater collecting apparatus of the present invention is provided with a vacuum valve basin installed underground to store a fixed amount of wastewater, and a wastewater from a sewage source. A sewage inflow pipe through which water flows into a vacuum valve basin, a vacuum valve suction pipe having one end open at the lower portion of the vacuum valve basin and the other end communicating with a vacuum sewer through a vacuum valve, and controlling opening and closing of the vacuum valve. A vacuum-type wastewater collecting apparatus comprising: a control means, and an air intake pipe having one end open to the ground and one end communicating with the inside of a vacuum valve casing, wherein the air intake section is provided. The air intake pipe and the sewage inflow pipe are communicated underground with a communication pipe in a state where is located at a fixed distance from the vacuum valve box.

[0010]

According to the above construction, even when the supply of air from the air intake pipe to the vacuum valve box is delayed and the negative pressure in the vacuum valve box rises up in the sewage inflow pipe, the negative pressure is maintained. When the air reaches the communication portion with the air intake pipe, part of the air taken into the air intake pipe is directly supplied to the sewage inflow pipe through the communication pipe, and the negative pressure in the sewage inflow pipe is reduced. This prevents the negative pressure in the vacuum chamber from being transmitted to the sewage generation source such as a house through the sewage inflow pipe.

[0011]

An embodiment of the present invention will be described below with reference to FIG. Members that perform the same operations as those described above with reference to FIG. 2 are denoted by the same reference numerals, and description thereof is omitted. In FIG. 1, an air intake pipe 11 is laid to a position at a certain distance from the vacuum valve housing 4, one end is open to the ground to form an air intake port 11a, and the other end is a vacuum valve housing 4a.
Communicates within. The air intake pipe 11 is connected to the air intake port 1.
A communication pipe 13 communicates with the public wastewater basin 3 in the ground below 1a. Air intake pipe 11 and communication pipe 13
Is the length L of the communication pipe 13, the length A of the air intake pipe 11 from the vacuum valve box 4 to the communication pipe 13, and the length of the sewage inflow pipe 2 from the vacuum valve box 4 to the public sewage tank 3. It is provided so as to be smaller than the sum with B.

The operation of the above configuration will be described below.
As described above, in the vacuum-type sewage collection apparatus, when the vacuum valve 6 is opened to suck sewage and the air pressure in the vacuum valve box 4 is reduced, air is taken in from the air intake pipe 11 and the vacuum valve is evacuated. It is designed to supply to Masu 4.

However, as shown in FIG.
If the installation distance is long, the supply of air to the vacuum valve box 4 may be delayed, and the negative pressure in the vacuum valve box 4 may go up the sewage inflow pipe 2. In this case, the negative pressure When reaching the sewage basin 3, a part of the air taken into the air intake pipe 11 from the air intake port 11a is supplied directly to the public sewage basin 3 and the sewage inflow pipe 2 through the communication pipe 13. This allows
The negative pressure in the sewage inflow pipe 2 is reduced, and transmission to the sewage source 1 such as a house is prevented. Therefore, without providing a structure on the ground, the toilet and the like in the sewage source 1
It is possible to prevent the sealing of the trap of the sanitary appliance from breaking or lowering of the water level.

If the length L of the communication pipe 13 is excessively long, the effect of preventing the negative pressure by supplying air to the sewage inflow pipe 2 through the communication pipe 13 cannot be expected. Therefore, as described above, (length L of communication pipe 13) <(length A of air intake pipe 11 from vacuum valve box 4 to communication pipe 13) + (vacuum valve box 4 to public wastewater tank 3) It is necessary to provide the air intake pipe 11 and the communication pipe 13 such that the length B) of the sewage inflow pipe 2 up to the maximum. When the air intake pipe 11 having a diameter of 100 mm is provided at a laying distance of 9 m, the communication pipe 1
In the configuration of the present invention provided with No. 3, the water level of the water seal trap of the toilet bowl was 0, whereas in the configuration without the communication pipe, the water level was reduced by 1.5 cm.

In the above embodiment, the air intake pipe 11 and the sewage inflow pipe 2 are communicated by the communication pipe 13 at the position of the public sewage basin 3.
Sewage inflow pipe 2 at a position further downstream or upstream
May be directly connected.

[0016]

As described above, according to the present invention, when the laying distance of the air intake pipe is long, the air intake pipe and the sewage inflow pipe are connected underground by a communication pipe of an appropriate length. I made it. In this way, even when the supply of air from the air intake pipe to the vacuum valve casing is delayed, a portion of the air taken into the air intake pipe can be directly supplied to the sewage inflow pipe through the communication pipe. Can be prevented from being transmitted to a sewage generation source such as a house through a sewage inflow pipe.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an overall configuration of a vacuum-type wastewater collecting apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an overall configuration of a conventional vacuum-type wastewater collecting apparatus.

[Explanation of symbols]

 1 Sewage generation source 2 Sewage inflow pipe 4 Vacuum valve box 5 Vacuum valve suction pipe 6 Vacuum valve 8 Vacuum sewage pipe 9 Vacuum valve controller 10 Sewage detection pipe 11 Air intake pipe 11a Air intake 13 Communication pipe

Claims (1)

(57) [Claims] 1. A vacuum valve basin installed underground for storing a certain amount of sewage, a sewage inflow pipe through which sewage from a sewage source flows into the vacuum valve basin, and one end opened at a lower portion in the vacuum valve basin. A vacuum valve suction pipe having the other end communicating with the vacuum sewer pipe through the vacuum valve, control means for controlling opening and closing of the vacuum valve, and an air intake port having one end open to the ground and the other end having a vacuum valve A vacuum-type sewage collection device having an air intake pipe communicating with the basin,
A vacuum-type sewage collection, wherein the air intake pipe and the sewage inflow pipe are communicated underground with a communication pipe in a state where the air intake section is located at a predetermined distance from the vacuum valve box. apparatus.