JPH02240338A - Vacuum type sewage water collecting device - Google Patents

Abstract

PURPOSE:To device simplified laying of the title device in a crowded residential area by extensively laying an air-supplying main pipe following a vacuum drain pipe, and by providing connecting pipes respectively between the main pipe and each of cesspools, and between the main pipe and each of vacuum valve devices for communication of air therethrough. CONSTITUTION:An air-supplying main pipe 18 is laid under the ground 17 at a distance from a vacuum drain pipe 4 and a vent pipe 19 is planted at an appropriate open space in a lot and the air inside the air-supplying pipe is communicated with the air above the ground therethrough. Then main pipe 18 is made to communicate with a cesspool 2 through a connecting pipe 21 at a place near the cesspool 2 and a valve basin 7. A vacuum valve 1 and a vacuum valve controller 8 of a vacuum valve device are made to communicate with the main pipe 18 through a connecting pipe 22. The main pipe 18 is laid in a place near the vacuum drain pipe 4 and the vacuum drain pipe 4 is laid in a ditch excavated from the ground 17. By simultaneous embedding of both pipes, control can be made easily. Thereby leakage of nasty odor from the vent pipe can be prevented and, at the same time, naughty doing to the vent pipe is prevented too.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to air supply means in vacuum sewage collection systems.

``Prior art'' Vacuum sewage collection equipment connects a sewage source, such as a residential complex, with a vacuum valve as a sewage suction means, a vacuum pump station as a sewage collection means, and a vacuum pump station and a vacuum valve to drain the sewage. It consists of a vacuum sewer pipe that connects the

Vacuum sewer pipes extend for hundreds to thousands of meters from the vacuum pumping station, and numerous vacuum valves are installed along them. Sewage in the Vacuum Valve When a certain amount of sewage accumulates, the vacuum valve controller is activated, the vacuum valve opens, and sewage and air are sucked into the vacuum sewer pipe. The air sucked into the vacuum sewer pipe expands within the vacuum pipe and pushes the wastewater forward. Conventionally (1) A diameter of φIQO was installed in the middle of the natural flow piping from each home to the sewage.
A vent pipe about 1000 m long was erected on the ground, and the air sucked into the vacuum sewage pipe was supplied to the sewer without sewage. Also,
The opening and closing of the vacuum valve is performed by a vacuum valve controller attached to the vacuum valve.

FIG. 4 is a schematic diagram showing the entire vacuum type sewage collection device. Sewage discharged from each household 11 above ground flows into an underground sewage basin 2 through an underground gravity flow pipe 6. Once a certain amount has accumulated, the vacuum valve 1 opens and the sewage is sucked in from the vacuum valve suction pipe 12, and the sewage is passed through the vacuum valve 1 to the vacuum sewage pipe 1 buried underground.
Air is drawn from the atmosphere through the vacuum valve suction pipe 12 into the vacuum sewer pipe 4 buried underground through the vacuum valve 1, and then into the wastewater tank 2. The water is sucked into the vacuum sewer pipe 4 through the pipe. The air entering the vacuum sewer pipe 16 and the vacuum sewer pipe 4 expands and becomes a multiphase flow of sewage and air, which is collected in the water collection tank 5 of the vacuum pumping station 10. The air in the water collection tank 5 is exhausted by the vacuum pump 20, and the water collection tank 5 is maintained at a constant degree of vacuum. The wastewater collected in the water collection tank 5 is sent to a sewage treatment plant or the like by a pressure pump 6.

In the above description, the vacuum sewer pipe 13 introduces vacuum pressure and causes wastewater to flow through the vacuum sewer pipe 4, so it is essentially a branch pipe of the vacuum sewer pipe 4, and is therefore a vacuum sewer pipe.

FIG. 5 is a longitudinal sectional view showing equipment on the sewage source side.

Sewage from each household flows into a sealed wastewater basin 2 through a gravity drain pipe 3. A vent pipe 14 communicates with the gravity flow pipe 3, and the vent pipe 14 is erected on the ground and opens into the atmosphere. A valve basin 7 is buried above the sewage basin 2. The valve 7 includes a vacuum valve 1 and a vacuum valve controller 8. The vacuum valve 1 normally isolates the vacuum valve suction pipe 12 and the vacuum wastewater pipe 16 from each other. Therefore, the vacuum sewer pipe 16 is the vacuum sewer pipe 4.
Although it is more branched, the vacuum pressure of the vacuum sewer pipe 4 does not reach the vacuum valve suction pipe 12 and the sewage basin 2. Sewage amount detection tube 1
One end of the gas ball introduction pipe 16 is connected to the upper end of the valve 5, and the other end of the gas ball introduction pipe 16 is connected to the vacuum valve controller 8.

The air pipe 9 for the vacuum valve controller comes out into the valve 7, which is erected on the ground with its upper end open to the atmosphere, and then goes underground to form the valve 1. and a vacuum valve controller 8.

When sewage flows into the sewage basin 2, the lower opening of the sewage amount detection tube 5 is blocked by the sewage. As the sewage rises in the sewage basin 2, it rises in the sewage amount detection tube 15, and pressurizes the air in the sewage amount detection tube 15.

When the air pressure exceeds a certain value, the air pressure passes through the gas ball introduction pipe 16.
The signal is transmitted to the vacuum valve controller 8 to operate the vacuum valve controller 8, and the vacuum valve controller 8 opens the vacuum valve 1. Then, the sewage is sucked into the vacuum valve suction pipe 12 due to the differential pressure between the atmospheric pressure in the sewage tank 2 introduced through the vent pipe 14 and the vacuum pressure in the vacuum sewage pipe 4, and the vacuum valve 1 is opened.
The water passes through the vacuum sewer pipe 16 and flows into the vacuum sewer pipe 4. When the surface of the sewage in the sewage basin 2 separates from the lower end of the vacuum valve suction pipe 12, the air being sent from the vent pipe 14 flows through the vacuum valve suction pipe 12, the open vacuum valve 1, and the vacuum sewage pipe 13. As shown, the sewage sent out first through the vacuum sewer pipe 4 becomes a vented multiphase flow with air and flows to the vacuum pump station 1.
Sent to 0.

The sewage water level in sewage tank 2 has fallen, and the sewage amount detection tube.

Even if the air pressure in 15 decreases, the vacuum valve controller 8 does not close the vacuum valve 1 immediately, but closes the vacuum valve at a certain value after a delay so that the air extraction ratio of waste water and air becomes a predetermined value. The valve closes after allowing air to pass through it for a certain amount of time.

The vacuum valve 1 described above is well known and is disclosed, for example, in U.S. Pat. No. 4,573,838.

``Problem to be Solved by the Invention'' However, in such a conventional method, a vent pipe 14 and a vent pipe 9 for the vacuum valve controller are erected on the ground for each vacuum valve 1 installed in a large number in the sewage collection area. These above-ground pipes have problems such as restrictions on the installation location, aesthetic problems, odor leakage from the vent pipe 14, and becoming a target for mischief. In addition, when vacuum sewer pipes and sewage basins are installed in the center of passages, vent pipes and ventilation pipes for vacuum valve controllers have to be laid across the road, resulting in an increase in road closure time. Particularly in densely populated areas, the locations for installing the vent pipe 14 and the vacuum valve controller ventilation pipe 9 are extremely limited.

The present invention is a vacuum sewage system that eliminates the need to install above-ground piping for each vacuum valve by burying the main pipe that supplies the atmosphere according to the vacuum sewer pipe, and supplying the atmosphere from this main pipe to the sewage and the vacuum valve controller. The purpose is to provide a collection device.

"Means for Solving the Problem" The first invention of the present invention connects the vacuum pump station and the outlet of a vacuum valve provided at a sewage source with a vacuum sewer pipe, and connects the inlet of the vacuum valve to a sewage tank using a vacuum suction pipe. In the connected vacuum sewage system, an atmospheric supply main pipe is extended along the vacuum sewage pipe,
This vacuum type sewage collection device is characterized by providing a communication pipe for communicating the atmosphere between an air supply main pipe, each sewage tank, and an air supply main pipe and each vacuum valve device.

A second invention of the present invention is the vacuum sewage collection device according to the first invention, in which a vacuum sewage pipe and an atmospheric supply main pipe are integrated.

"Embodiments" Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of the present invention. The same part as the conventional example is above ground 1
7, a sewage basin 2 buried under the valve basin 7, the inside of the valve basin 7, the vacuum valve 1, the vacuum valve suction pipe 12, the vacuum valve device consisting of the vacuum valve controller 8, etc., and the vacuum sewage pipe 13,
They are a vacuum sewer pipe 4 and a gravity flow pipe 6, and do not have a ventilation pipe 9 for a vacuum valve controller and a vent pipe 14. Therefore, only the parts that are different from the conventional example will be explained.

In addition to the vacuum sewer pipe 4, an atmospheric supply main pipe 18 extends below the ground level 17. The atmosphere supply main pipe 18 communicates with the atmosphere above the ground through a vent pipe 19 erected above the ground at a suitable location.

The location where the vent pipe 19 is provided is, for example, the vacuum pump station 10,
The location has plenty of space. Near the sewage basin 2 and the valve basin 7, the atmosphere supply main 18 and the sewage basin 2 are connected through a connecting pipe 21, and the atmosphere supply main 18 and the vacuum valve 1 of the vacuum valve device are connected to each other.
The vacuum valve controller 8 is communicated with a connecting pipe 22.

If the atmospheric supply main pipe 18 is arranged near the vacuum sewer pipe 4 and along the vacuum sewer pipe 4, when the vacuum sewer pipe 4 is buried in a trench excavated from the ground 17, it can be buried at the same time, so there is no particular need for separate installation. This is advantageous because it can be buried without digging a trench. If the atmospheric supply main pipe 18 is located along the vacuum sewer pipe 4, later maintenance and management will be convenient. However, the atmospheric supply main pipe 18 may be partially separated from the vacuum sewer pipe 4 due to underground obstructions.

Since communication line or power transmission ducts are usually buried under roads along the road, the atmosphere supply main 18 may be used by providing a vent pipe 19 to these ducts for other purposes.

When the water level of the sewage flowing into the sewage basin 2 from each household 11 through the gravity flow pipe 6 rises, the increase in air pressure in the sewage amount detection pipe 15 is transmitted to the vacuum valve controller 8 via the gas pressure introduction pipe 16, and the vacuum The valve controller 8 controls the air pressure introduced as a pressure medium for operating the vacuum valve 1 from the atmosphere supply main pipe 18 via the communication pipe 22 to open the vacuum valve 1. As a result, due to the differential pressure between the atmospheric pressure applied to the sewage in the sewage tank 2 via the air supply main 18 and the communication pipe 21 and the vacuum pressure in the vacuum sewage pipe 4, the sewage in the sewage tank 2 is flows into the vacuum sewer pipe 4 through the vacuum valve suction pipe 12, the open vacuum valve 1, and the vacuum waste pipe 13. Air first flows into the waste water 2 from the vent pipe 19, the atmospheric supply main pipe 18, and the communication pipe 21, and when most of the waste water is sent from the waste water tank 2 and the waste water surface separates from the vacuum valve suction pipe 12, it enters the waste water tank 2. The incoming air follows the preceding sewage through the vacuum valve suction pipe 12.
, passes through the open vacuum valve 1 and the vacuum wastewater pipe 16, exits to the vacuum wastewater pipe 4, expands, becomes a multiphase flow together with wastewater, and heads toward the vacuum pumping station 10.

On the other hand, when the sewage in the sewage basin 2 decreases during the operation and the air pressure in the sewage amount detection tube 15 decreases, that pressure is transmitted to the vacuum valve controller 81 via the gas pressure introduction tube 16. However, the vacuum valve controller 8 is provided with a means for delaying the closing operation of the vacuum valve 1, so that the vacuum valve 1 closes when the purge ratio of the sewage and air sucked into the vacuum sewer pipe 4 reaches a certain ratio. do.

"Other Embodiments" In the embodiments described above, the vacuum sewer pipe and the atmospheric supply main pipe are arranged separately. In this embodiment, these are integrated or integrated. FIG. 2 shows a cross section of the pipe, which is a synthetic resin composite pipe in which the vacuum sewer pipe 4 and the atmospheric supply main pipe 18 are integrally molded with a connecting portion 26. By doing this, the sewage first 2, the valve box 7 are located in the same place, and are connected to the vacuum sewage pipe, and the connecting pipes 21 and 22 are connected to the sewage tank 2, the valve box 7, the vacuum sewage pipe 4, and the atmospheric supply main 18 in the same location. Since they are connected to each other, there is no difficulty in connecting them, and the construction work for burying the composite pipe is the same as burying only the vacuum sewer pipe 41, and the pipe construction is simpler than in the case of vacuum sewer pipe 4 and atmospheric supply main pipe 18, respectively. Strength increases.

Incidentally, the vacuum sewer pipe 4 and the atmospheric supply main pipe 18 may each be made into a single pipe and tied together with a stacking band.
FIG. 6 shows a cross section of the pipe, in which the vacuum sewer pipe 4 and the atmospheric supply main pipe 18 are double-pipe-tied and connected by a rift 24 between the two pipes. In this embodiment, wastewater flows through the vacuum sewer pipe 4, and air led from the atmosphere passes through the space between the vacuum sewer pipe 4 and the atmospheric supply main pipe 18. In this example, the pipe joints are special, but
Burying double pipes is easy.

〔Effect of the invention〕

As described above, the present invention extends the atmospheric supply main pipe according to the vacuum sewage pipe, so there is no need to install a vent pipe for each vacuum valve and a ventilation pipe for the vacuum valve controller, so a vacuum sewage collection system can be installed in a densely populated area. It has become easier to set up. In addition, there are no obstacles on the road, and the beauty of the area where the vacuum sewage collection device is installed is not spoiled, and the conventional problems of odor leaking from the vent pipe and tampering with the vent pipe are eliminated.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, and FIGS. 2 and 6 are sectional views of other embodiments of the atmospheric supply main pipe. FIG. 4 is a schematic diagram showing a vacuum sewage collection device, and FIG. 5 is a longitudinal sectional view showing a conventional sewage generation source device.・Vacuum valve 2.・Sewage basin 6.・Gravity flow pipe 4.・
Vacuum sewage pipe 5. Water collection system. Pressure pump 7.
・Valve mass 8・・Vacuum valve mount roller 9・・Vent pipe for vacuum valve controller 10・・Vacuum pump station 11・・
Household 12... Vacuum valve suction pipe 13... Vacuum sewage pipe 14.
・Vent pipe 15・・Sewage amount detection tube 16・・Gas pressure introduction pipe 17・・Ground 18・・Air supply main pipe 19・・Vent pipe 20・Vacuum pump 21. 22・・Communication pipe 2
3...Connection part 24...Riff. Patent applicant: Ebara Corporation

Claims (1)

[Claims] 1. In a vacuum sewage system in which the outlet of a vacuum valve provided at a vacuum pumping station and a sewage generation source is connected by a vacuum sewage pipe, and the inlet of the vacuum valve is communicated with a sewage tank by a vacuum suction pipe. , characterized in that an atmospheric supply main pipe is extended along the vacuum sewer pipe, and connecting pipes are provided for communicating the atmospheric air between the atmospheric supply main pipe and each sewage basin, and between the atmospheric supply main pipe and each vacuum valve device. Vacuum sewage collection equipment. 2. Claim 1 in which the vacuum sewer pipe and the atmospheric supply main pipe are integrated.
Vacuum sewage collection device as described.