JPH084924A - Emergency shutoff valve - Google Patents

Abstract

PURPOSE:To provide an emergency shutoff valve to prevent the outflow of the drinking water in a distributing reservoir or an adjusting reservoir by providing an electrically driven valve on the piping immediately after the distributing reservoir or the adjusting reservoir, and reducing the in-line pressure to the minimum value where the piping is not empty without fully closing a valve to keep the in-line pressure constant when the emergency shutdown is made in response to the activation of a seismoscope by the earthquake. CONSTITUTION:In a facility such as the water supply where the water is supplied from a distributing reservoir or an adjusting reservoir to those who demand the water through the piping on the downstream side, a means A to keep the minimum pressure in the piping on the downstream side without fully closing an electrically driven valve 3 in an emergency shutdown by a seismoscope 5 in a system consisting of the seismoscope 5 to be activated by the vibration caused by the earthquake and the electrically driven valve 3 which is electrically connected to this seismoscope 5 by an electric cable is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility for supplying clean water to a water consumer through a pipeline located downstream of a distribution reservoir / regulating pond in a water supply system or the like. When an electric valve is installed in the machine and the seismic shock is activated due to an earthquake and the emergency shutoff is performed accordingly, the valve is not closed completely and the pipe pressure is reduced to the minimum pressure that does not empty the pipe. The present invention relates to an emergency shutoff valve for the purpose of keeping the pressure constant, preventing the outflow of drinking water from distribution reservoirs and regulating reservoirs, and retaining it.

[0002]

2. Description of the Related Art Conventionally, in general, there are no emergency shutoff valves installed in the pipelines on the downstream side of the distribution reservoirs and regulating reservoirs in the water supply facilities in various places. Alternatively, even if the valve is installed, the valve is fully closed, the pipe line downstream of the valve becomes empty, and the pipe line is filled with air.

Therefore, it is necessary to forcibly remove the air during the next water passage. Furthermore, at the next water flow,
Since the pipe is empty, the water becomes a torrent, the precipitate in the pipe is washed away, and it becomes the red water water that is most disliked by the water supply.

As described above, conventionally, no emergency shutoff valve is installed, or even if it is installed, the shutoff valve is fully closed, the pipeline is emptied, and it takes a lot of time and cost to remove air and restore water quality. However, this will cause a great deal of damage and annoyance to water consumers.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned case, the present invention is directed to an emergency shutoff having a means for holding the downstream side of the valve at a minimum pressure in a pipeline immediately after a distribution reservoir / regulating reservoir. A valve is installed to prevent the above-mentioned various adverse effects.

[0006]

According to the first aspect of the present invention, there is provided a seismic sensor which is actuated by a vibration caused by an earthquake, and an electric motor which is electrically connected to the seismic sensor by an electric cable. The present invention proposes an emergency shutoff valve characterized by including a means for holding a minimum pressure on the downstream side of the motorized valve without fully closing the motorized valve at the time of emergency shutoff by the operation of the seismic sensor. .

Further, in the invention described in claim 2,
The means is a control panel to which a signal is transmitted by the operation of the seismic sensor, a pressure indicating regulator provided on the control panel to set a minimum pressure in advance, and an electric power source connected to the control panel. It is mainly composed of a drive electric motor for operating the valve and a pressure transmitter for feeding back pressure of the electric valve to the pressure indicating regulator. The invention according to claim 3 is characterized in that the pressure indicating regulator is replaced with a computer.

[0008]

[Operation] The seismic sensor having the above-described structure and an electric cable for the seismic sensor.
In a motor-operated valve connected by a cable, a seismic sensor operates due to a vibration caused by an earthquake, and the motor-operated valve responds to it with an electric cable to make an emergency cutoff. At this time, the valve is not fully closed, and the minimum pressure is maintained on the downstream side of the valve. Furthermore, since the water is not shut off because it is not fully closed, it is possible to perform a test operation in normal times as an emergency shutoff valve.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows the overall configuration of this embodiment, in which an outlet pipe 2 is provided at the outlet of the reservoir / regulating reservoir 1, and an electric valve is provided immediately after the reservoir / regulating reservoir 1 with the outlet pipe 2 interposed therebetween. 3, and a water distribution main 4 is connected to the downstream side of the motor-operated valve 3.

The seismic sensor 5, the control panel 6 and the motor-operated valve 3 are electrically connected by an electric cable 7, and a storage battery 8 used when a power failure occurs is built in the control panel 6. The pressure indicating regulator 9 is incorporated in the surface of the control panel 6.

From the pressure detecting port 10 on the downstream side of the motor-operated valve 3 to the pressure transmitter 11, the pressure indicating regulator 9 of the control panel 6 is connected.
Is electrically connected by an electric cable 12. When the external commercial power source 13 is connected to the control panel 6 and the external commercial power source 13 is energized, the storage battery 8 in the control panel 6 stores electricity. The control panel 6, the pressure indicating regulator 9, the drive motor 19 described later, and the pressure transmitter 11 constitute a means A for holding the minimum pressure.

An outline of the structure of the motor-operated valve will be described with reference to FIG. 2. In FIG. 2, reference numeral 14 is a valve body, and the valve body 14 has an inflow port 15 and a discharge port 16. The inflow port 15 communicates with the distribution reservoir / regulation reservoir 1 through the outflow pipe 2, and the discharge port 16 communicates with the distribution main pipe 4. The valve body 17 provided in the valve body 14 is a valve rod 1
Drive motor 19 is connected via 8.

Next, the operation of the emergency shutoff valve of the present invention will be described. When an earthquake occurs and the seismoscope 5 that operates due to the vibration acts, a signal due to the operation is transmitted to the control panel 6, and the drive motor 19 of the motor-operated valve 3 is driven to turn the motor-operated valve 3 in the valve closing direction. Emergency cutoff to.

In this case, by setting the minimum pressure in advance by the pressure indicating regulator 9, the motor-operated valve 3 is not fully closed, and the closing operation is stopped at the valve opening of the set minimum pressure.

In this operation, the pressure on the downstream side is fed back from the pressure detection port 10 through the pressure transmitter 11 to the pressure indicating regulator 9 of the control panel 6. The pressure on the downstream side becomes the set minimum pressure and is kept constant at the set minimum pressure.

Air does not enter the water distribution main pipe 4 on the downstream side and is kept at the minimum flow rate by the minimum pressure, so that the outflow of drinking water from the distribution reservoir / regulation reservoir 1 is minimized. By securing drinking water, it is possible to meet the demand of water consumers (so-called citizens) after the earthquake.

After the operation of the motor-operated valve 3, the motor-operated valve 3 can be artificially fully closed, fully opened, or arbitrarily opened. The pressure indicating regulator 9 in the above configuration may be replaced with a computer for control.

Further, when the downstream main water distribution pipe 4 is ruptured or destroyed due to an earthquake, the pressure detecting port 10 detects an abnormal pressure drop in the main water distribution pipe 4, and the control panel 6 senses it. Then, the motor-operated valve 3 can be shut off urgently. In this case as well, the downstream side is set to the minimum pressure, and the motor-operated valve 3 can be fully closed if necessary.

[0019]

As described above, according to the present invention, in a seismic sensitive device which is actuated by a vibration caused by an earthquake and a motor-operated valve electrically connected to the seismic sensitive device, an emergency shutoff is performed by actuating the seismic sensitive device. At this time, the emergency shutoff valve having a device for keeping the downstream side of the motor-operated valve at the minimum pressure empties the downstream side pipeline and does not fill it with air, thus eliminating the air. The time and cost for the maintenance is not necessary, and the reddening of tap water accordingly can be prevented. As a result, recovery from the earthquake will be quicker, and the outflow of drinking water in distribution reservoirs and regulating reservoirs will be reduced as much as possible to ensure drinking water, and there will be no significant damage or annoyance to water consumers after the earthquake. .

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing an example of an electric valve.

[Explanation of symbols]

 3 Motorized valve 5 Seismic sensor 6 Control panel 9 Pressure indicating regulator 11 Pressure transmitter 19 Drive motor A Means for holding the minimum pressure

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[Procedure amendment]

[Submission date] August 22, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

Further, in the invention described in claim 2,
The means includes a control panel to which a signal is transmitted by the operation of the seismoscope, a pressure indicating controller provided on the control panel to set a minimum pressure in advance, and an electric power source connected to the control panel. It is mainly composed of a drive motor for operating the valve and a pressure transmitter for feeding back the pressure on the downstream side of the motor valve to the pressure indicating controller. The invention according to claim 3 is characterized in that the pressure indicating controller is replaced with a computer.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

The seismoscope 5, the control panel 6 and the motor-operated valve 3 are electrically connected by an electric cable 7, and a storage battery 8 used in the event of a power failure is built in the control panel 6. The pressure indicating controller 9 is incorporated in the surface of the control panel 6.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

A pressure indicating controller 9 of a control panel 6 is passed from a pressure detecting port 10 on the downstream side of the motor-operated valve 3 to a pressure transmitter 11.
Is electrically connected by an electric cable 12. When the external commercial power source 13 is connected to the control panel 6 and the external commercial power source 13 is energized, the storage battery 8 in the control panel 6 stores electricity. The control panel 6, the pressure indicating controller 9, the drive motor 19, which will be described later, and the pressure transmitter 11 constitute a means A for holding the minimum pressure.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

In this case, by setting the minimum pressure in advance by the pressure indicating controller 9, the motor-operated valve 3 is not fully closed, and the closing operation is stopped at the valve opening of the set minimum pressure.

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

In this operation, the pressure on the downstream side is fed back to the pressure indicating controller 9 of the control panel 6 through the pressure detecting port 10 and the pressure transmitter 11. The pressure on the downstream side becomes the set minimum pressure and is kept constant at the set minimum pressure.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

After the operation of the motor-operated valve 3, the motor-operated valve 3 can be artificially fully closed, fully opened, or arbitrarily opened. The pressure indicating controller 9 in the above configuration may be replaced with a computer for control.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing an example of an electric valve.

[Explanation of Codes] 3 Motorized valve 5 Seismic sensor 6 Control panel 9 Pressure indicating controller 11 Pressure transmitter 19 Drive motor A A means for holding the minimum pressure

Claims (3)

[Claims] 1. A seismic sensor which is activated by a vibration caused by an earthquake, and a motor-operated valve electrically connected to the seismic sensor by an electric cable. An emergency shutoff valve comprising a means for keeping a minimum pressure in the pipeline on the downstream side of the electrically operated valve without fully closing the electrically operated valve. 2. The control means is connected to the control panel, a control panel to which a signal is transmitted by the operation of the seismic sensor, a pressure support adjuster provided on the control panel to preset a minimum pressure, and the control panel. 2. A drive motor for operating a motor-operated valve by a generated power source, and a pressure transmitter for feeding back pressure on the downstream side of the motor-operated valve to the pressure indicating regulator. Emergency shutoff valve. 3. The emergency shutoff valve according to claim 2, wherein the pressure indicating regulator is replaced with a computer.