JPH05311728A - Vacuum valve equipment - Google Patents

Abstract

PURPOSE:To provide the title equipment whereby a controller is protected against its submergence. CONSTITUTION:Filthy water flowing into a tank body 28 is discharged toward a vacuum sewer pipe 14 from a suction pipe 30 through a vacuums valve 32. A control 34 for opening and shutting this vacuum valve 32 is provided at the inside of a vent pipe 72, which position is higher than a ground surface. When a waterlevel in the tank body 28 becomes high, the controller 34 is turned on and a vacuum pressure in the vacuum sewer pipe 14 is transmitted into the vacuum valve 32 through vacuums tubes 40, 42. Therefore, an air bleed pipe is made unnecessary. Since the controller is provided at the inside of the vent pipe above the ground surface, there is no fear of its submergence. The controller can be inspected and repaired without opening the lid of the tank body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum valve unit (relay unit) for a vacuum sewer system.

[0002]

2. Description of the Related Art A vacuum type sewer system is a system in which a sewer pipe is evacuated (not a complete vacuum but a depressurized state is referred to) and a pressure difference between the sewer pipe and the atmosphere is used to collect wastewater in the sewer pipe.

The vacuum type sewage collection system does not require a continuous gradient unlike the natural flow type sewer system when constructing a pipeline, and has the following features. Since the laying depth of the pipeline is shallow, the pipe construction cost can be significantly reduced. Enables sewer construction in areas where sewer construction was difficult due to high groundwater levels, difficult rock excavation, etc. Construction on winding alleys is also easy. Due to the forced intermittent high-speed collection of gas-liquid mixed phase by vacuum, there is no fear of blockage of the pipeline and piping with a small diameter is possible.

FIG. 2 shows an example of the structure of this vacuum sewer system. Wastewater discharged from sanitary facilities such as homes and factories is connected to a vacuum valve unit (relay unit) 10 by an inflow pipe 8.
Flow into. From this vacuum valve unit 10, it is sent to a vacuum station 16 via a vacuum sewer pipe 14, and is sent from a pressure pump 18 via a pressure pipe 20 to a sewage treatment facility.

In this vacuum station 16, the waste water circulating pump 22 supplies the waste water in the receiving tank 24 to the ejector 26, whereby the vacuum sewer pipe 14 is evacuated and the waste water is collected in the vacuum station 16.

The vacuum valve unit 10 is for relaying a waste water source to the vacuum station 16, and as shown in FIG. 3, a tank body 28 into which waste water flows from the inflow pipe 8 and the inside of the tank body 28. A suction pipe 30 for sucking dirty water and sending it to the vacuum sewer pipe 14, and a vacuum valve 32 provided in the suction pipe 30,
A controller 34 for operating the vacuum valve 32, a pressure transmission pipe 36 provided at the upper end of the controller 34, and the like are provided. The vacuum valve 32 uses a negative pressure in the vacuum sewer pipe 14 as a driving power source.

When dirty water flows into the tank body 28, the tank body 28
The water level inside rises gradually. Then, as the water level rises, the air pressure trapped in the pressure transmission pipe 36 rises, and when this air pressure exceeds a threshold value, the diaphragm activator provided in the controller 34 is opened and the negative pressure in the vacuum sewer pipe 14 is reduced. The pressure is transmitted to the vacuum valve 32 via the vacuum tubes 40 and 42. As a result, the valve body 44 of the vacuum valve 32 is opened, and the dirty water W in the tank body 28 is sucked into the suction pipe 30.
Is sucked into the vacuum sewer pipe 14.

When the sewage in the tank body 28 is sufficiently sent out and the water level in the tank body 28 becomes lower than the lower end of the pressure transmission pipe 36, the pressure in the pressure transmission pipe 36 drops, and the vacuum tube 4
The communication of 0 and 42 is blocked, and the vacuum valve 32 is closed.
(Note that instead of closing the vacuum valve 32 when the pressure in the pressure transmission pipe 36 drops in this way, a timer operates to close the vacuum valve 32 when a predetermined time has elapsed after the vacuum valve 32 opened. When the dirty water is sucked out from the suction pipe 30, air is taken in from the air pipe 38,
Waste water is sucked into the vacuum sewer pipe 14 as a gas-liquid mixed phase flow.

The air bubbles lift the sewage at the upwardly sloping air lift portion 14a provided at an appropriate position of the vacuum sewer pipe 14. Thus, by combining the evacuation and the air lift action, the sewage can be stably sent even over a long distance.

Details of the structure of the vacuum valve 32 are shown in FIG.
One end of the pipe line 46 communicates with the vacuum sewer pipe 14, and the other end thereof is connected to the suction pipe 30. A valve seat portion 48 is provided in the middle of the pipe line 46 so that the valve element 44 can be seated. The valve element 44 is fixed to the tip of a rod 50, and the rear end of the rod 50 is fixed to a bellows 52. It should be noted that the middle of the rod 50 is supported by a bearing member 54 so as to be movable back and forth in the longitudinal direction. This bellows 5
A control chamber 56 is formed by 2 to be separated from the inside of the pipe line 46. A spring 58 is installed in the control room 56,
The valve element 44 is biased in the seating direction. The vacuum tube 42 is connected to the control chamber 56.

When the vacuum is transmitted from the vacuum tube 42, the bellows 52 pulls up the valve element 44 via the rod 50 to open the valve. When this vacuum transmission is stopped, the valve body 44 is pushed down by the urging force of the spring 58, and the valve is closed.

The details of the configuration of the controller 34 are shown in FIG. Reference numeral 60 denotes a housing, which is partitioned by a diaphragm 62 into an atmospheric pressure chamber 64 and a control chamber 66.
The pressure transmission pipe 36 is connected to. Atmospheric pressure chamber 64
The inside is communicated with the atmosphere by an air blazed pipe 68. A three-way switching valve 70 is arranged in the atmospheric pressure chamber 64,
The vacuum tubes 40 and 42 are connected to the switching valve 70. An upper end of a rod 74 fixed to the diaphragm 62 is pivotally attached to the operation lever 72 of the switching valve 70.

When the pressure in the pressure transmission pipe 36 increases,
The rod 74 ascends together with the diaphragm 62 and the actuating lever 72 is pushed up, whereby the vacuum tube 40,
42 comrades are communicated. As a result, the vacuum in the vacuum sewer pipe 14 is transmitted to the vacuum valve 32, and the vacuum valve 32 is opened. When the pressure in the pressure transmission pipe 36 drops, the rod 74
Is lowered and the operating lever 72 is pulled down. And
The vacuum tubes 40, 42 are blocked from communicating with each other, and instead the vacuum tube 42 is communicated with the housing 60.
As a result, the control chamber 56 of the vacuum valve 32 has the tube 42
Also, the atmospheric pressure is transmitted via the air-breezed pipe 68, and the vacuum valve 32 is closed.

As shown in FIG. 3, the tank 28 is provided with the air-breathed pipe 68 so as to reach the atmosphere (surface) from the side wall of the tank. The air blazed pipe 68 is provided so as to reach the atmosphere so that the control operation can be performed even if the inside of the tank body 28 becomes full for some reason and the controller 34 is submerged. Is.

Further, in this tank body 28, the air pipe 3
A ventilation pipe 76 is required to introduce the sewage transfer air taken in from the tank 8 into the tank body 28.
Is also provided so as to reach the atmosphere (surface) from the side wall of the tank body 28.

[0016]

As described above, in the conventional vacuum valve unit, it is necessary to install the two pipes 68 and 76 from the side wall of the tank body 28 to reach the ground surface, which is troublesome to construct. Was there. Also, the controller 3
Since 4 is arranged in the tank body 28, when the tank body 28 is filled with water, the controller 34 is submerged. Therefore, it has been necessary to make the controller extremely waterproof. Further, to check the controller 34, the tank body 2
It was inconvenient because the lid 78 of 8 had to be opened.

[0017]

A vacuum valve unit according to the present invention is a vacuum unit used for relaying a vacuum sewer system, comprising a tank body for storing waste water flowing from an upstream sewer pipe, and the stored waste water. A vacuum valve for intermittently sending out to the vacuum sewer pipe on the downstream side, and detecting the water level of the sewage in the tank body, and when the detected water level exceeds a threshold value, the negative pressure in the vacuum sewer pipe on the downstream side is In a vacuum valve unit comprising a controller that transmits to a vacuum valve to open the vacuum valve, and a ventilation pipe that communicates with the atmosphere in the tank, the ventilation pipe is extended above the surface of the earth. The controller is installed at a position higher than the ground surface in the ventilation pipe.

[0018]

The vacuum valve unit according to the present invention does not require an air breeze pipe. Further, since the controller is provided in the ventilation pipe higher than the surface of the earth, there is no possibility that the controller will be submerged in water. Furthermore, the controller can be inspected and repaired without opening the lid of the tank body.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of a vacuum valve unit according to an embodiment. In this embodiment, the ventilation pipe 7 is provided from the side wall of the tank body 28.
Only 6 is extended above the surface 82. The controller 34 is provided above the ventilation pipe 76 (above the ground surface), and the vacuum tubes 40 and 42 are drawn into the ventilation pipe 76. This controller 34
Is connected to the upper end of the pressure transmission pipe 36 via a pressure guiding pipe 80.

The other configurations are the same as those of the conventional example including the details of each device.

In the vacuum valve unit according to the present invention, since the casing 60 of the controller 34 can be provided with an opening so that the inside of the casing 60 can be directly communicated with the atmosphere, the air-breezed pipe is unnecessary. Also,
Since the controller 34 is provided in the ventilation pipe 76 higher than the ground surface 82, there is no possibility that the controller 34 will be submerged in water. Furthermore, the controller 34 can be inspected and repaired without opening the lid of the tank body 28.

In the above embodiment, when the pressure in the pressure transmission pipe 36 is increased, the vacuum tubes 40 and 42 are prevented from communicating with each other. However, a timer is incorporated in the controller 34 so that the vacuum tubes 40 and 42 communicate with each other. The vacuum tubes 40 and 42 may be automatically blocked from communicating with each other after a predetermined time has elapsed.

[0023]

As described above, in the vacuum valve unit of the present invention, the air-breezed pipe is unnecessary. Also,
Since the controller is installed in the ventilation pipe higher than the surface of the earth, there is no possibility of the controller being submerged. Furthermore, the controller can be inspected and repaired without opening the lid of the tank body.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a vacuum valve unit according to the present invention.

FIG. 2 is a side sectional view showing an outline of a conventional vacuum sewer system.

FIG. 3 is a side view showing a cross section of a main part of a conventional vacuum valve unit.

FIG. 4 is a side sectional view showing a vacuum valve.

FIG. 5 is a cross-sectional view showing a controller.

[Explanation of symbols] 10 vacuum valve unit 14 vacuum sewage pipe 28 tank body 32 vacuum valve 34 controller 40 vacuum tube 42 vacuum tube 44 valve body 68 air-breathed pipe 76 vent pipe

Claims (1)

[Claims] 1. A vacuum unit used for relaying a vacuum sewer, comprising: a tank body for storing wastewater that has flowed in from an upstream sewer pipe, and delivering the stored wastewater to a downstream vacuum sewer pipe. A vacuum valve for disconnecting and detecting the water level of dirty water in the tank body, and when the detected water level exceeds a threshold value, the negative pressure in the vacuum sewer pipe on the downstream side is transmitted to the vacuum valve to open the vacuum valve. In a vacuum valve unit comprising a controller for controlling and a ventilation pipe communicating with the atmosphere in the tank, the ventilation pipe is extended to a position higher than the surface of the earth, and the ventilation pipe is installed at a position higher than the surface of the earth. A vacuum valve unit in which the controller is installed.