JPH07217536A - Failure return mechanism for vacuum valve - Google Patents

Abstract

PURPOSE:To recover the pressure of a vacuum tank to the appropriate vacuum pressure so as to enable automatic return from a minor action failure by opening a pipeline to the air to close a vacuum valve forcibly at the abnormal time of the vacuum valve kept in the open state. CONSTITUTION:Normally, the inside of a vacuum tank 4 and a sewer pipeline 3 is maintained to appropriate vacuum pressure by the driving of a vacuum pump 7. A cylinder chamber 13 is communicated with a suction pipe 16 by a vacuum valve 5 through a three-way valve 15, and a valve body 12 is opened against a spring 14 by vacuum pressure in the sewer pipeline 3. Sewage water in a sewer thereby flows into the vacuum tank 4 through the sewer pipeline 3. When the abnormality of the vacuum valve 5 kept in the opened state is generated, the abnormal rise of pressure in the vacuum tank 4 is detected by a sensor 25, and a gate valve 21 is closed, while an air release valve 22 is opened. The valve body 12 of the vacuum valve 5 is thereby closed by the spring 14, and the pressure in the vacuum tank 4 is recovered to the appropriate vacuum pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum valve failure recovery device used in a sewer pipe or the like.

[0002]

2. Description of the Related Art Conventional sewage pipeline systems include a system for collecting sewage by utilizing vacuum pressure. 3 to 4,
The sewage basin 2 into which the sewage from each house 1 flows is connected to a vacuum tank 4 via a sewage pipe line 3, and a vacuum valve 5 and a sluice valve 6 are provided in the middle of the sewage pipe line 3. A vacuum pump 7 is connected to the vacuum tank 4.

As shown in FIG. 4, the vacuum valve 5 urges a valve body 12 arranged inside a valve box 11 in a closing direction by a spring 14 built inside a cylinder chamber 13,
The cylinder chamber 13 communicates with a suction pipe 16 and an open pipe 17 via a three-way valve 15, and the suction pipe 16 communicates with a downstream side of the valve body 12, that is, a suction source side.

In this structure, the sluice valve 6 is opened while the vacuum tank 4 is driven to a suitable vacuum pressure by driving the vacuum pump 7, and the vacuum valve 5 is opened according to the water level of the sewage basin 2. Suck the sewage in the sewage basin 2. In this vacuum valve 5, the cylinder chamber 13 communicates with the open pipe 17 through the three-way valve 15 when the water level in the sewage basin 2 is lower than the set value.
When the valve body 12 is closed by the biasing force of the spring 14 and the water level in the sewer 2 is higher than the set value, the cylinder chamber 1
3 communicates with the suction pipe 16 via the three-way valve 15, and the valve body 12 is opened against the biasing force of the spring 14 by the vacuum pressure in the sewer pipe line 3.

[0005]

However, in the above-mentioned conventional configuration, the vacuum valve 5 is not operated due to an abnormality in the controller controlling the three-way valve 15 or the water level gauge in the sewage basin 2.
Malfunctions and remains open. When the vacuum valve 5 is kept open, air is constantly sucked into the sewer pipe 3 after the water level in the sewage basin 2 falls below the lower limit value, and the vacuum tank 4
The internal pressure approaches atmospheric pressure, and sewage does not flow in the sewage pipe line 3 other than the sewage basin 2 in which the defective vacuum valve 5 is arranged. Moreover, as long as the vacuum pump 7 operates, the sewer pipe 3
Since some vacuum pressure acts on the cylinder chamber 13
The open state of the vacuum valve 5 could not be released due to the vacuum pressure acting on.

The present invention is intended to solve the above problems,
An object of the present invention is to provide a failure recovery device for a vacuum valve, which can automatically release the open state of the vacuum valve when the vacuum valve is kept open due to a malfunction.

[0007]

In order to solve the above-mentioned problems, the failure recovery device for a vacuum valve according to the present invention has one end open in a container and the other end communicating with a vacuum tank to which a vacuum pump is connected. A vacuum valve is installed in the middle of the pipe, and the cylinder chamber of the vacuum valve is connected to the suction pipe communicating with the pipe via a three-way valve and an open pipe opened to the atmosphere, and the valve body is closed in the cylinder chamber. In a vacuum pipeline system having a spring for urging in the moving direction, a sluice valve is provided in the middle of the pipeline between the vacuum valve and the vacuum tank, and in the middle of the pipeline between the sluice valve and the vacuum valve. An atmosphere release valve is provided in communication with the vacuum tank, pressure detection means is provided in the vacuum tank, and a control device for controlling the opening and closing of the sluice valve and the atmosphere release valve is provided based on the pressure value detected by the pressure detection means. is there.

In the vacuum valve failure recovery device of the present invention, one end of the vacuum valve is opened in the container, and the other end is connected to a vacuum tank to which a vacuum pump is connected. In a vacuum pipeline system in which a cylinder chamber is connected to a suction pipe communicating with the pipeline via a three-way valve and an open pipe opened to the atmosphere, and a spring for urging the valve element in the closing direction is installed in the cylinder chamber, A control device that is provided with an atmosphere release valve that communicates with the vacuum tank and pressure detection means in the vacuum tank, and controls opening / closing of the atmosphere release valve and start / stop of the vacuum pump based on the pressure value detected by the pressure detection means. Is provided.

[0009]

With the first structure described above, the sluice valve is normally opened and the atmosphere opening valve is normally closed, so that the pressure in the vacuum tank and the pipeline is adjusted to an appropriate vacuum pressure by driving the vacuum pump. Become. In this state, the three-way valve is operated to apply the vacuum pressure in the pipeline to the cylinder chamber via the suction pipe, and the vacuum pressure in the cylinder chamber opens the valve body against the biasing force of the spring, and the target in the container The liquid is led through a line into the vacuum tank. When the suction of the target liquid is stopped, the three-way valve is operated to cause atmospheric pressure to act on the cylinder chamber through the open pipe, and the valve body is closed by the biasing force of the spring.

When the vacuum valve remains open for some reason during an abnormality, the pressure inside the vacuum tank rises abnormally and the suction force decreases. At this time, an abnormal increase in the pressure in the vacuum tank is detected by the pressure detection means, and the control device controls the sluice valve and the atmosphere opening valve based on the pressure value detected by the pressure detection means, and closes the sluice valve. Open the atmosphere release valve. In this state, the inside of the pipe line becomes atmospheric pressure, and the inside of the cylinder chamber becomes atmospheric pressure through the suction pipe, and the valve element of the vacuum valve is closed by the biasing force of the spring. On the other hand, when the sluice valve is closed, the pressure in the vacuum tank sucked by the vacuum pump is restored to an appropriate vacuum pressure.
Therefore, after a certain period of time after opening the atmosphere release valve, when the pipeline pressure becomes close to the atmospheric pressure, or when the pressure in the vacuum tank is restored to an appropriate vacuum pressure, the atmosphere release valve is closed and Open the gate valve to return to the normal state.

According to the second structure of the present invention, the atmosphere opening valve is normally closed, and the pressure in the vacuum tank and the pipeline is set to an appropriate vacuum pressure by driving the vacuum pump. In this state, the three-way valve is operated to apply the vacuum pressure in the pipeline to the cylinder chamber via the suction pipe, and the vacuum pressure in the cylinder chamber opens the valve body against the biasing force of the spring, and the target in the container The liquid is led through a line into the vacuum tank. When the suction of the target liquid is stopped, the three-way valve is operated to cause atmospheric pressure to act on the cylinder chamber through the open pipe, and the valve body is closed by the biasing force of the spring.

If the vacuum valve remains open for some reason during an abnormality, the pressure in the vacuum tank rises abnormally and the suction force decreases. At this time, the pressure detecting means detects an abnormal rise in the pressure in the vacuum tank, and the control device controls the atmosphere opening valve and the vacuum pump based on the pressure value detected by the pressure detecting means to open the atmosphere opening valve. At the same time, the vacuum pump is stopped. In this state, the inside of the pipe line becomes atmospheric pressure, and the inside of the cylinder chamber becomes atmospheric pressure through the suction pipe, and the valve element of the vacuum valve is closed by the biasing force of the spring. The atmosphere release valve is closed and the vacuum pump is restarted to return to the normal state after a certain period of time from the opening of the atmosphere release valve or when the pipe line pressure becomes close to the atmospheric pressure.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Members that perform the same operations as those described in FIGS. 3 to 4 are denoted by the same reference numerals, and the description thereof will be omitted.

In FIG. 1, an electric sluice valve 2 located between the vacuum pump 4 and the vacuum valve 5 is provided in the middle of the sewer line 3.
1 is interposed, and an electric atmosphere release valve 22 located between the sluice valve 21 and the vacuum valve 5 is connected through an atmosphere release pipe 23, and is located upstream of the atmosphere release pipe 23. A pressure gauge 24 is provided. The vacuum tank 4 is provided with a sensor 25 serving as a pressure detecting means such as a pressure switch and a pressure gauge. The control device 26 includes a vacuum pump 7 and a sluice valve 2.
1, an atmosphere release valve 22, a pressure gauge 24, a sensor 25, and an alarm device 27 are connected, and the control device 26 controls the gate valve 2
1 and the opening and closing of the atmosphere opening valve 22 and the start / stop of the vacuum pump 7 are controlled.

The operation of the above structure will be described below.
Under normal conditions, the sluice valve 21 is opened and the atmosphere release valve 22 is closed, and the vacuum pump 4 is driven to create an appropriate vacuum pressure in the vacuum tank 4 and the sewage pipe line 3. In this state, when the water level in the sewage basin 2 is higher than the set value, the vacuum chamber 5 has the three-way valve 15 in the cylinder chamber 13.
Through the suction pipe 16 and the vacuum pressure in the sewer pipe 3 causes the valve body 12 to open against the biasing force of the spring 14. When the vacuum valve 5 is open, sewage, which is the target liquid in the sewage basin 2, flows into the vacuum tank 4 through the sewage pipe line 3. When the water level in the sewage basin 2 becomes lower than the set value and the suction of dirty water is stopped, the three-way valve 15 is operated to communicate the cylinder chamber 13 with the open pipe 17, and the valve body 12 is closed by the urging force of the spring 14. To do.

When the vacuum valve 5 remains open for some reason, the pressure in the vacuum tank 4 rises abnormally and the suction force decreases, so the pressure in the vacuum tank 4 rises abnormally. Is detected by the sensor 25,
When the sensor 25 detects a pressure value equal to or higher than the set pressure, the control device 26 controls the sluice valve 21 and the atmosphere opening valve 22 to close the sluice valve 21 and open the atmosphere opening valve 22.

By this operation, the inside of the sewage pipe line 3 becomes atmospheric pressure, and the inside of the cylinder chamber 13 becomes atmospheric pressure through the suction pipe 16, and the valve body 12 of the vacuum valve 5 is closed by the urging force of the spring 14. On the other hand, when the sluice valve 21 is closed, the pressure in the vacuum tank 4 sucked by the vacuum pump 7 is restored to an appropriate vacuum pressure. Therefore, after a certain period of time after opening the atmosphere release valve 22, or when the pressure of the sewage pipe 3 measured by the pressure gauge 24 becomes near atmospheric pressure, or the pressure in the vacuum tank 4 detected by the sensor 25 is appropriate. When the vacuum pressure is restored to a normal level, the atmosphere release valve 22 is closed, the sluice valve 21 is opened, and the normal state is restored.

When the sensor 25 again detects an abnormal increase in pressure within a fixed time after returning to the normal state, an alarm device 27 connected to the control device 26 issues an alarm to notify the administrator of the abnormal condition.

Therefore, according to this embodiment, the vacuum valve 5
The vacuum valve 5 can be forcibly closed in response to the above abnormality, and the pressure in the vacuum tank 4 can be restored to a normal value, and a minor malfunction can be automatically restored.

FIG. 2 shows another embodiment of the present invention, in which an atmosphere opening valve 22 communicates with the vacuum tank 4 via an atmosphere opening pipe 23. According to this configuration, the atmosphere release valve 22 is normally closed, and the vacuum pump 7 is driven to create an appropriate vacuum pressure in the vacuum tank 4 and the sewer pipe line 3. In this state, the vacuum valve 5 is operated in the same manner as in the previous embodiment to introduce the sewage, which is the target liquid in the sewage basin 2, into the vacuum tank 4 through the sewage pipe line 3.

When the vacuum valve 5 remains open for some reason, the sensor 25 detects an abnormal increase in the pressure in the vacuum tank 4, and the sensor 25 detects a pressure value higher than the set pressure. Control device 2 at time
6 controls the atmosphere release valve 22 and the vacuum pump 7,
The atmosphere release valve 22 is opened, the vacuum pump 7 is stopped, and the valve body 12 of the vacuum valve 5 is closed by the biasing force of the spring 14 in the same manner as in the previous embodiment.

After that, the atmosphere release valve 22 is closed for a certain period of time, or when the pressure in the sewer pipe 3 becomes close to the atmospheric pressure, the atmosphere release valve 22 is closed and the vacuum pump 7 is restarted. Return to the state. Other functions and effects are similar to those of the previous embodiment.

[0023]

As described above, according to the present invention, the pressure in the vacuum tank can be controlled by forcibly closing the vacuum valve by opening the pipeline to the atmosphere at the abnormal time when the vacuum valve remains open. It is possible to recover to an appropriate vacuum pressure, and it is possible to automatically recover from a slight malfunction.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a vacuum valve failure recovery device according to an embodiment of the present invention.

FIG. 2 is an overall configuration diagram of a vacuum valve failure recovery device according to another embodiment of the present invention.

FIG. 3 is an overall configuration diagram showing a conventional sewer pipe system.

FIG. 4 is a schematic diagram showing a conventional vacuum valve.

[Explanation of symbols]

 3 Sewer pipe 4 Vacuum tank 5 Vacuum valve 7 Vacuum pump 21 Gate valve 22 Atmosphere opening valve 25 Sensor 26 Control device 27 Alarm device

Claims (2)

[Claims] 1. A vacuum valve is provided in the middle of a conduit communicating with a vacuum tank to which a vacuum pump is connected, and one end of which is opened inside a container, and the cylinder chamber of the vacuum valve is provided via a three-way valve. In a vacuum pipeline system that is connected to a suction pipe that communicates with a pipeline and an open pipe that is open to the atmosphere, and that has a spring inside the cylinder chamber that urges the valve element in the closing direction, in the vacuum pipeline system, between the vacuum valve and the vacuum tank. A sluice valve is provided in the middle of the pipeline, an atmosphere opening valve is provided in communication with the sluice between the sluice valve and the vacuum valve, an atmosphere release valve is provided, a pressure detection means is provided in the vacuum tank, and the pressure detection means detects it. A failure recovery device for a vacuum valve, comprising a control device for controlling opening / closing of a sluice valve and an atmosphere opening valve based on a pressure value. 2. A vacuum valve is provided in the middle of a conduit communicating with a vacuum tank to which a vacuum pump is connected, one end of which is opened in a container, and the other end of which is provided with a cylinder chamber of the vacuum valve via a three-way valve. In a vacuum pipeline system that is connected to a suction pipe that communicates with the pipeline and an open pipe that is open to the atmosphere, and that has a spring inside the cylinder chamber that urges the valve element in the closing direction, communicate with the vacuum tank and release the atmosphere to the atmosphere. In addition to the above, a vacuum is provided with a pressure detecting means in the vacuum tank, and a control device for controlling opening / closing of the atmosphere opening valve and start / stop of the vacuum pump based on the pressure value detected by the pressure detecting means. Valve failure recovery device.