JPH0376945A - Sewage pit for vacuum type sewage collecting device - Google Patents

Abstract

PURPOSE:To secure the strength of a sewage measure and to make it possible to safely correspond with maintenance work by mounting a vacuum valve to the upper part of a partition plate inside the pit of concrete in the shape of a cylinder, and having such a constitution as discharging the sewage to the outside when it reaches a specific quantity. CONSTITUTION:The upper block 31 and lower block 32 of a pit having a concrete side wall are formed in the shape of a cylinder, a partition plate 2 is mounted to the inside thereof, the lower part is a sewage pit 17, and a vacuum valve 11 is mounted to the upper part. When the sewage from an inflow pipe 7 reacjes a specific quantity, air pressure inside a sensor pipe 4 rises to open the vacuum valve 11, a vacuum soil pipe 10 in a state of vacuum is connected to an inlet pipe 5, and the sewage in a sewage measure 3 with the vacuum valve is sucked to discharge to the outside from the inlet pipe 5. In the event of abnormality, an inspection may be made by opening an iron lid 12. According to the constitution, the strength of the sewage pit can be sufficiently secured and, at the same time, it can safely correspond with maintenance work.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vacuum type sewage collection device, which is one of the methods for collecting sewage from a large number of houses, and particularly improves the sewage basin used in this device. The present invention relates to a sewage basin for a vacuum type sewage collection device.

[Conventional technology]

Conventionally, there is a vacuum type sewage collection device as one of the devices for collecting sewage from many houses.

This vacuum-type sewage collection device causes sewage discharged from above-ground households to flow into a sewage basin with a vacuum valve located underground.

When a certain amount of this wastewater accumulates inside the vacuum valve-equipped wastewater tank, it is sucked out into the vacuum waste pipe through the vacuum valve attached to the top of the vacuum valve-equipped wastewater pipe, and then sent to the vacuum pumping station. It is composed of

By the way, there are two types of structures of conventional sewage basins with vacuum valves.One is that the outer wall of the sewage basin with vacuum valve is made of synthetic resin, the inside is partitioned into upper and lower parts, and the vacuum valve is installed on the top. , the lower part of which is designed to contain waste water.

Another sewage system with a vacuum valve is one in which a vacuum valve is installed at the top of a concrete cell with no upper and lower partitions.

[Problem to be solved by the invention]

However, the above-mentioned conventional sewage basin with a vacuum valve has the following problems.

■Sewage water with a vacuum valve made of synthetic resin mentioned above First of all, it is not very strong, so it must be installed in the garden of a private house where the load of vehicles is not normally applied, and it cannot be installed under the road. There were problems in that not only were there considerable restrictions, but permission was required for each inspection and repair, which was complicated.

Furthermore, the partition plate that separates the lower part of the sewage basin from the upper part where the vacuum valve is installed does not have a hole for people to pass through, so if a large foreign object were to flow into the sewage basin, there was no way to remove it. Another problem is that even if the water level of sewage rises due to a failure of a vacuum valve, there is no way to know if there is an abnormality until the sewage overflows onto the ground.

■In addition, sewage with a vacuum valve is constructed by installing a vacuum valve on the top of a concrete cell with no upper and lower partitions. First of all, it has sufficient strength so it can be installed on roads, but the vacuum valve is not installed. The vacuum valve was not separated from the lower part where sewage collected, creating a sanitary problem for workers maintaining the vacuum valve.

Also, in the case of this sewage basin equipped with a vacuum valve, there is a problem in that even if the water level of the sewage rises due to a failure of the vacuum valve, the abnormality cannot be known until the sewage overflows to the ground.

The present invention has been made in view of the above points, and has sufficient strength, can partition the upper and lower parts with a partition plate, can also take out large foreign objects that have flowed into the sewage tank, and can further improve the water level of the sewage. To provide a sewage tank with a vacuum valve that can detect an abnormality when the water rises abnormally.

[Means to solve the problem]

In order to solve the above problems, the present invention divides the inside of a strong prefabricated concrete cylindrical outer wall into upper and lower parts with synthetic resin partition plates, and blocks off the upper part from the sewage basin in the lower part.

A vacuum valve is installed above the partition plate, and the suction pipe and sensor pipe of the vacuum valve pass through the partition plate and open into the sewage at the bottom.

On the other hand, the bottom of the sewage tank is shaped like a funnel to become deeper, so that the inflow can easily collect at the suction pipe.

Furthermore, a water level detector with a vacuum valve is installed to detect abnormal rise in the water level of the sewage inside the sewage tank, and the system outputs the signal to the outside.

[Effect]

As mentioned above, since the outer wall of the vacuum valve-equipped sewage basin is made of concrete, it has sufficient strength and can be installed on roads where vehicles and the like pass.

Furthermore, since the part where the vacuum valve is installed is completely separated from the sewage basin at the bottom, it is sanitary for the workers who maintain the vacuum valve.

In addition, parts that provide strength, such as the outer walls, are made of concrete, while other parts are made of synthetic resin, making it possible to reduce costs and weight.

Furthermore, since a water level detector is installed, abnormal water level rise in the vacuum valve-equipped sewage tank can be detected at an early stage.

Furthermore, since the bottom of the sewage basin is formed into a substantially funnel shape, if the opening of the suction pipe is installed in this part, the inflow will easily collect at the opening of the suction pipe.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 2 is a diagram showing the overall configuration of a vacuum type sewage collection device to which the present invention is applied.

As shown in the figure, sewage discharged from each household 30 above ground flows into a sewage basin 3 with a vacuum valve underground through a gravity flow type inlet pipe 7 underground. When a certain amount of sewage accumulates at the bottom of this vacuum valve-equipped sewage basin 3, the vacuum valve 11 attached to the top of the vacuum valve-equipped sewage basin 3 opens, and the sewage in the vacuum-valved sewage basin 3 is first discharged from the suction pipe 5. It gets sucked in. This sewage is sucked into a vacuum sewage pipe 10 extending underground through a vacuum valve 11, and collected in a water collection tank 41 of a vacuum pumping station 40. The wastewater collected in the water collection tank 41 is sent to a sewage treatment plant or the like by a pressure pump 42.

Here, the vacuum valve 11 is attached near the tip of the vacuum wastewater pipe 10 and opens and closes the vacuum wastewater pipe 10. This opening/closing is performed depending on the amount of sewage in the sewage basin 3 with a vacuum valve.

FIG. 1 is a side sectional view showing the detailed structure of a wastewater basin 3 with a vacuum valve according to the present invention.

As shown in the figure, this sewage basin 3 with a vacuum valve has side walls made of concrete such as an upper mass 31 and a lower mass 33.
It is constructed in a cylindrical shape, and a synthetic resin partition plate 2 is attached inside the partition plate 2. The lower part of the partition plate 2 is used as a sewage basin 17, and the vacuum valve 11 is attached to the upper part.

Each component will be explained in detail below.

The side wall of this sewage basin 3 with a vacuum valve is configured such that the upper mass 31 is placed on the lower mass 33. Here, the upper mass 3L and the lower mass 33 are made of concrete to strengthen their strength in order to receive soil from the surroundings.

A concrete bottom plate 35 is placed at the bottom of the lower mass 33, and an iron lid 1 is placed over the upper mass 31 so that its upper surface is flush with the ground surface 15.

The partition plate 2 is made of synthetic resin and is attached so as to engage with a gap formed at the joint between the upper mass 31 and the lower mass 33. Below is the upper part of this partition plate 2.
4. The lower part is called the sewage basin 17.

A vacuum valve 11 is installed within the valve chamber 14. A suction pipe 5 and a sensor pipe 4 connected to this vacuum valve 11 pass through the partition plate 2 and open at a lower position of the wastewater basin 17. Further, the vacuum wastewater pipe 10 connected to the vacuum valve 11 passes through the upper mass 31 and extends to the water collection tank 41 of the vacuum pumping station 40 shown in FIG. 2.

Note that the internal structure of the sensor tube 4 and the vacuum valve 11 is described in, for example, Japanese Patent Application No. 1-111329 previously filed by the applicant of the present application.
The structure used is as shown in the specification and drawings of the issue.

Further, a manhole 2a is provided in the partition plate 2 so that a person can get down into the wastewater basin 17, and a step 8 is attached to the inner surface of the lower part of the basin 33. Further, the manhole 2a is covered with a lid 12.

A funnel-shaped bottom plate 6 made of synthetic resin is attached to the bottom of the sewage basin 17. This funnel-shaped bottom plate 6 is configured to become narrower in the shape of a funnel as it goes downward, and its outer surface is fixed to the lower mass 33 with mortar 16.

The lower end of the suction pipe 5 opens near the deepest part of the funnel-shaped bottom plate 6.

Further, above the inner surface of the lower mass 33, a water level detector 9 for detecting the dirty water surface is attached. In addition to electrodes and float switches, the water level detector 9 may be configured with, for example, a pressure switch that detects the pressure inside the sensor tube 4.

Note that this water level detector 9 may be attached to any other desired location, and in some cases may be attached to a desired location within the upper valve box 14.

Next, the operation of this sewage basin 3 with a vacuum valve will be explained.

First, sewage flows from the inflow pipe 7 into the lower part of the sewage basin 3 with a vacuum valve. At this time, the sewage is transferred to the suction pipe 5 by the funnel-shaped bottom plate 6.
It gathers around the bottom edge of.

When a predetermined amount of sewage accumulates, the air pressure inside the sensor pipe 4 increases, and this information is sent to the vacuum valve 11, which opens the vacuum sewage pipe 10 and the suction pipe 5, which are in a vacuum state. are in communication with each other, and the sewage in the vacuum valve equipped sewage pipe 3 is sucked in through the suction pipe 5 and discharged to the outside.

By the way, if sewage is not sucked in normally due to an abnormality in the sensor pipe 4 or the vacuum valve 11, and the water level of the sewage rises beyond the normal control range, the abnormality must be corrected before the sewage overflows to the ground surface 15. The water level detector 9 detects this, and an alarm (not shown) connected to the water level detector 9 issues an alarm.

Furthermore, in order to inspect the vacuum valve 11 in such an abnormal state or during normal inspection, an inspector only needs to open the iron cover 1. At this time, the lower sewage basin 17 and the valve basin 14 are separated by the partition plate 2, so it is sanitary.

Further, when inspecting the inside of the wastewater basin 17, the inspector only has to open the lid 12 and enter the inside of the wastewater basin 17 using step 8.

〔Effect of the invention〕

As described above in detail, the wastewater basin for a vacuum type wastewater collection device according to the present invention has the following excellent effects.

■Since the outer wall of the sewage basin 3 with vacuum valve is made of concrete, it has sufficient strength and can be installed on roads where vehicles pass.

- Since the part where the vacuum valve 11 is installed is completely separated from the sewage basin 17 at the bottom, there will be no sanitary problems for workers during maintenance of the vacuum valve 11.

■The outer walls and other parts that provide strength are made of concrete, while the other parts are made of synthetic resin, making it possible to reduce costs and weight.

■Since the water level detector 9 is installed, an abnormal rise in the water level in the sewage tank 3 with a vacuum valve can be detected before the sewage overflows to the outside.
I can handle it.

(2) Since the bottom of the sewage basin is formed into a substantially funnel shape, if the opening of the suction pipe 5 is installed in this part, the inflow will easily collect at the opening of the suction pipe 5.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing the detailed structure of a wastewater basin 3 with a vacuum valve according to the present invention, and FIG. 2 is a diagram showing the overall structure of a vacuum type wastewater collection device to which the present invention is applied. In the diagram, 2...partition plate, 3...sewage basin with vacuum valve,
5... Suction pipe, 6... Funnel-shaped bottom plate, 9... Water level detector, 10... Vacuum sewer pipe, 11... Vacuum valve, 12
...Lid, 3O...Home, 40...Vacuum pump station,
It is.

Claims (3)

[Claims] (1) Sewage discharged from many houses is collected in a cesspool,
Vacuum sewage collection device that sucks the sewage collected in the sewage tank into the vacuum sewage pipe through a vacuum valve that opens and closes the vacuum sewage pipe, and collects the sewage sucked into the vacuum sewage pipe to a vacuum pumping station installed in the area. In this method, the outer wall of the sewage basin is constructed of a cylindrical body made of concrete, and a partition plate is installed inside the cylindrical body to partition the inside of the cylindrical body into upper and lower parts, and the lower part of the partition plate is made into a sewage basin. In addition, a vacuum valve is provided at the top, and the partition plate is equipped with a hole large enough to allow a person to descend into the sewage basin at the bottom, and a lid to close the hole, and the bottom of the sewage basin is formed into a substantially funnel shape. Vacuum type sewage collection equipment for sewage collection. (2) The sewage basin for a vacuum type sewage collection device according to claim 1, wherein the partition plate is made of synthetic resin. (3) Claim (1) characterized in that a water level detector is provided at a predetermined position inside the cylindrical body to detect when the water level of sewage accumulated in the cylindrical body has exceeded a predetermined water level. ) or (2) for vacuum type sewage collection equipment.