JPH0445716B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an on-off valve device that opens and closes in response to the opening and closing of a small auxiliary valve. More specifically, the present invention relates to such an on-off valve device that can be opened and closed regardless of whether the sub-valve is closed or opened.

[Prior Art] Conventionally, on-off valve devices, such as water supply valves for water receiving tanks in water supply facilities, have been equipped with on-off valve devices that are opened and closed by water pressure by opening and closing a sub-valve, which is a small on-off valve. There is. Such an on-off valve device includes a pressure chamber and a pressure receiving body movably provided within the pressure chamber, and changes the pressure within the pressure chamber.
This moves the pressure receiving body, and the movement of the pressure receiving body opens and closes the valve body. This pressure chamber is communicated with a high pressure side such as an inflow side chamber via a pressure guiding passage. Further, a pressure relief passage communicates with this pressure chamber, and this pressure relief passage communicates with the atmosphere or a low-pressure outflow side chamber via a small auxiliary valve such as a float valve of a water tank, for example.

Therefore, for example, when the water level in the water tank rises above a predetermined water level and the float valve, that is, the sub-valve closes, the pressure on the high pressure side introduced into the pressure chamber through the pressure guide passage is released. The pressure inside this pressure chamber increases. Then, the pressure receiving body is driven by this pressure, the valve body is closed, and water supply to the water tank is stopped.

Further, when the water level in the water tank decreases, the above-mentioned float valve, that is, the sub-valve opens, and the pressure in the pressure chamber is released through the pressure release passage. Therefore, the valve body and the pressure receiving body are pushed up and opened by the water pressure used in the valve body, and the water supply is resumed.

By the way, in such a conventional device, the opening/closing valve device cannot be opened/closed other than by opening/closing the auxiliary valve. Therefore, if this sub-valve malfunctions, or if a foreign object gets caught between the valve body and the valve seat of this on-off valve device, the on-off valve device cannot be opened or closed manually from the outside. Ta. Therefore, in such cases, the on-off valve device must be disassembled, which is extremely inconvenient.

Conventionally, in preparation for such failures, a manual on-off valve was provided in series with this on-off valve device. However, providing such a separate on-off valve increases the cost of the water supply equipment, and in the event of a failure, the on-off valve must be manually operated.

Additionally, in schools, multi-tenant buildings, etc., water consumption may drop significantly due to summer weather, changes in tenants, fluctuations in occupancy rates, etc. In such cases, the turnover rate of water supplied to the water tank becomes poor.
The water supplied to this water tank will remain for a long time before being consumed, which may lead to deterioration of water quality.

In such a case, it is preferable to lower the maximum water level of the water tank to reduce the actual capacity of the water tank. However, in the conventional system, the only way to lower the maximum water level was to lower the mounting position of the float valve, which was extremely troublesome and could not be carried out in practice.

Due to the above-mentioned circumstances, there has been a demand for the development of an on-off valve device that can be opened and closed at will from the outside, regardless of the opening and closing of the sub-valve, in response to breakdowns, maintenance, or fluctuations in water consumption.

[Problems to be Solved by the Invention] The present invention has been made to solve the above-mentioned problems, and it is possible to open and close the sub-valve from the outside regardless of whether it is open or closed. The present invention provides an on-off valve device that can be opened and closed.

[Means for Solving the Problems] The present invention provides a first
In addition to the pressure guiding passage, a second pressure guiding passage is formed, and in addition to the first pressure relief passage communicating this pressure chamber and the sub-valve, a second pressure relief passage is formed. A solenoid valve mechanism is provided to open and close the pressure guiding passage and the second pressure relief passage, and the first pressure guiding passage and the first pressure relief passage are formed as orifices that restrict the flow rate of the flowing fluid. This is what I did.

[Function] In such an on-off valve device, if both of the above-mentioned solenoid valve mechanisms are opened and closed, pressure is introduced into the pressure chamber through the first pressure guiding passage, and the pressure is introduced into the pressure chamber through the first pressure relief passage. Pressure is released through the valve, and the valve opens and closes in response to the opening and closing of the sub-valve, similar to conventional valves.

In the event of a failure, or when opening/closing the on-off valve device arbitrarily regardless of the opening/closing of the sub-valve, the above-mentioned solenoid valve mechanism can be selectively opened/closed to open/close the valve at will. can.
In this case, since the first pressure passage and the first pressure relief passage are configured to act as an orifice that limits the flow rate, even if the sub-valve remains open, the second pressure passage When the solenoid valve mechanism in the pressure passage is opened, a large amount of fluid is supplied to the pressure chamber from the high pressure side via this second pressure guiding passage, and the pressure in this pressure chamber rises sufficiently, so this opening/closing valve The device can be opened.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. This embodiment is an on-off valve device for supplying water to a water tank. In this embodiment, when the valve body of this on-off valve device gets caught in a foreign object and cannot be completely closed, this on-off valve device is automatically opened and then closed, and the foreign object is removed. This on-off valve device is incorporated into a water supply control system that can automatically remove water.

In addition, this water supply system detects the water level in the water tank using a water level detector, and based on this water level signal, the control device arbitrarily controls the opening/closing of the on-off valve device to control the water level in the water tank. This is a system that can be controlled within any range.

FIG. 1 shows the overall configuration of this system.
1 in the figure is a water tank, and water is supplied into the water tank 1 through a water supply pipe 3. An on-off valve device 2 is provided in the middle of the water supply pipe 3 and is configured to control water supply into the water tank 1 . Further, a pressure relief pipe 4 is connected to this on-off valve device 2, and an electromagnetic on-off valve 5 is attached to the tip of this pressure relief pipe 4 as a sub-valve. Further, a water level detector 6 is provided in this water tank 1 and is configured to detect the water level in this water receiving tank 1. The signal from the water level detector 6 is sent to the control device 7, and the control device 7 is configured to control the sub-valve 5 and the on-off valve device 2 based on this water level signal.

The on-off valve device 2 described above is constructed as shown in FIG. That is, 20 is the valve body,
This valve body 20 is formed with an inflow side chamber 21 which is a high pressure side and an outflow side chamber 22 which is a low pressure side. A valve port 24 is formed to communicate the inflow side chamber 21 and the outflow side chamber 22. A valve body 25 is seated on this valve port 24 from the outflow side chamber 22 side, and is configured to open and close this valve port. Further, a pressure chamber 28 is formed in this valve body. In this pressure chamber 28, there is a pressure receiving body 2.
7 is accommodated. This pressure receiving body 27 is movably accommodated in the pressure chamber 28 while keeping it watertight. Further, an atmospheric pressure chamber 29 is formed on the back side of the pressure receiving body 27, and this atmospheric pressure chamber 29 communicates with the atmosphere via an atmosphere communication passage 30. and,
This pressure receiving body 27 is connected to the above-mentioned valve body 2 via the valve shaft 26.
It is connected to 5. Further, a first pressure guiding passage 31 is formed within this valve shaft 26, and this first pressure guiding passage 31 communicates the above-mentioned inflow side chamber 21 and pressure chamber 28. Further, a second pressure guiding passage 32 is formed separately from this first pressure guiding passage 31, and this second pressure guiding passage 32 also communicates the above-mentioned inflow side chamber 21 and pressure chamber 28. A solenoid valve mechanism 33 is provided in the middle of this second pressure guiding passage 32. This electromagnetic valve mechanism 33 includes a valve body 34 that opens and closes this second pressure guiding passage 32.
4 is urged in the valve closing direction by a spring. Then, the solenoid 3 of this electromagnetic valve mechanism 33
The valve body 34 is configured to open when the valve 5 is excited. Further, a pressure relief passage 44 communicating with the pressure chamber 28 is formed.
This pressure relief passage 44 also serves as a small diameter orifice, and is connected to the sub-valve 5 via the pressure relief pipe 4. Further, a second pressure relief passage 41 is formed separately from this first pressure relief passage 44, and this second pressure relief passage 41 communicates the above-mentioned pressure chamber 28 and the above-mentioned outflow side chamber 22. ing. And this second
A solenoid valve mechanism 38 is provided in the middle of the pressure relief passage 41 . This solenoid valve mechanism 38
The valve body 39 is provided with a valve body 39 for opening and closing the pressure relief passage 41, and this valve body 39 is urged in the valve closing direction by a spring. The valve body 39 is configured to open when the solenoid 40 of the electromagnetic valve mechanism 38 is energized. Note that 37 is a stopper, and by adjusting this stopper 37, the strokes of the pressure receiving body 27 and the valve body 25 can be adjusted.

In the on-off valve device configured in this manner, when the sub-valve 5 is closed, the pressure on the inflow chamber 21 side is transferred to the pressure chamber 28 via the first pressure guiding passage 31. The pressure is introduced and accumulated, and this pressure pushes down the pressure receiving body 27, and the valve body 25 closes. Further, when the sub-valve 5 is opened, the pressure inside the pressure chamber 44 is reduced to the first pressure relief passage 4.
4. Since the pressure is released through the pressure relief pipe 4, the pressure in the pressure chamber 28 decreases, and the pressure in the inflow side chamber 21 acting on the lower surface of the valve body 25 pushes up the valve body 25. Open the valve. Furthermore, when the above-mentioned sub-valve 5 is closed, the pressure introduced via the pressure-guiding passage 32 is accumulated in the pressure chamber 28, and the pressure-receiving body 27 is pushed down by this pressure, causing the valve to open. The body 25 is pushed down, and this on-off valve device is closed.

Further, the configuration of a control device 7 for a water supply system using such an on-off valve device will be explained with reference to FIG. 3. In the figure, 50 is a fuse, 51 is a power switch, and 54 is a power lamp. These are connected to, for example, a commercial power source 53. This control device 7 is provided with a water level control section 62 for controlling the water level in the aquarium 1 within a predetermined range.
This water level control section 62 is composed of a flip-flop circuit, and is connected to the above-mentioned commercial power source 53 via the power source section 61. When the low water level signal S1 is input from the water level detector 6, the relay 63 is energized by the signal from the water level control section 62, the contact 63a of this relay is closed, and the auxiliary valve is closed. Solenoid 5a of No. 5 is energized, and this sub-valve 5 is opened. By opening the sub-valve 5, the on-off valve device 2 described above is opened, and water is supplied into the water receiving tank 1 through the water supply pipe 3.

When the water level in the water tank 1 rises and reaches a predetermined water level, the high water level signal S2 is input from the water level detector 6 to the water level control section 62, and the relay 63 is demagnetized. Relay contact 5
3a is opened, the solenoid 5a of the sub-valve 5 is deenergized, and the sub-valve 5 is closed. By closing the sub-valve 5, the on-off valve device 2 is closed, and water supply to the water tank 1 is stopped. In this way, the water level in this water tank 1 is controlled between a predetermined low water level and a predetermined high water level.

In addition, the control device 7 is also configured to prevent water supply to the water tank 1 when the water supply cannot be stopped, for example, if the valve body 25 of the on-off valve device 2 gets stuck with a foreign object or the sub-valve 5 breaks down. Abnormal water level control section 65 for dealing with the case where the water level inside rises above
is provided. This abnormal water level control section 65 is
When the abnormal water level signal S3 is input from the water level detector 6, the relay 64 is energized and the contact 64a of this relay is closed. By closing the contact 64a, power is supplied to the alarm buzzer 57, which outputs an alarm, and the alarm lamp 58 is turned on. Note that 56 is a buzzer stop switch, and by opening this switch, the sounding of the buzzer can be stopped. In addition, the contact 6 of the relay 64 described above
The relay 60 is configured to be energized by closing 4a. A timer 59 is connected in series to this relay 60. This timer 59
is activated by being energized, and is configured to open its contacts and cut off energization after a predetermined short period of time has elapsed. Also, this relay 6
0 has a normally open contact 60a and a normally closed contact 60b.
The normally open contact 60a is connected to the solenoid 40 of the electromagnetic valve mechanism 38 of the second pressure relief passage 41 of the on-off valve device 2, and the normally closed contact 60b is connected to the second pressure passage 32. It is connected to the solenoid 35 of the electromagnetic valve mechanism 33.

Therefore, when the abnormal water level signal S3 is input, the contact 64a of the relay 64 is closed, the alarm buzzer 57 sounds, and the alarm lamp 58 stops. At the same time, the relay 60 is energized, its contact 60a is closed, and its contact 60b is opened. Therefore,
The electromagnetic valve mechanism 38 of the on-off valve device 2 opens,
The pressure within the pressure chamber is relieved via this second pressure relief passage. Therefore, this on-off valve device 2 opens and its valve body 25 rises. As a result, water flows between the valve body 25 and the valve port 24, and foreign objects caught in the valve body 25 are removed.
Next, when a predetermined period of time has passed, the above-mentioned ball 59
is activated, energization to relay 60 is cut off, contact 60a is opened, and contact 60b is closed. Therefore, the solenoid valve mechanism 38 of the second pressure relief passage 41
closes and blocks this second pressure relief passage, and at the same time, the electromagnetic valve mechanism 33 of the second pressure passage 32 opens, and pressure is generated in the pressure chamber 28 through this second pressure passage. be introduced. Therefore, this opening/closing device 2
becomes closed again. If the above-mentioned sub-valve 5 fails and is not closed, this on-off valve device 2
is not closed, this pressure chamber 28 remains open to the outside via the first pressure relief passage 44, but this first pressure relief passage 44 has a small diameter and does not allow water to flow through. Since high-pressure water is introduced into this pressure chamber 28 through the first and second pressure guiding passages 32, pressure is accumulated in this pressure chamber 28. Therefore, even if the sub-valve 5 remains open, the on-off valve device 2 is closed. Therefore, according to such a water supply control system, if the valve body of this on-off valve device gets caught in a foreign object and becomes unable to close completely, or if the sub valve 5 malfunctions and becomes unable to close, Even in such a case, the on-off valve device 2 can be automatically closed.

Note that the present invention is not limited to those used in water supply control systems such as those described above, but can be applied to other open/close valve devices in general that can be opened and closed automatically or manually from the outside regardless of the open/closed state of the sub-valve. .

Moreover, the above-mentioned sub-valve does not necessarily have to be an electromagnetic valve, but may be a float valve that is opened and closed by a float that moves up and down in response to the water level in the water tank.

[Effects of the Invention] As described above, the present invention is normally opened and closed in response to the opening and closing of the sub-valve, but it can also be opened and closed from the outside regardless of the opening/closing state of the sub-valve.
It is extremely convenient in the event of a breakdown or maintenance inspection, etc., and has great effects, such as being able to open and close as desired from the outside.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which FIG. 1 is a schematic configuration diagram of the entire system, FIG. 2 is a vertical sectional view of the on-off valve device, and FIG. 3 is a circuit diagram of the control device. 1...Water tank, 2...Opening/closing valve device, 5...Sub-valve, 6...
Water level detector, 7...control device, 25...valve body, 27...
Pressure receiving body, 28...pressure chamber, 31...first pressure guiding passage,
32...Second pressure guiding passage, 33...Solenoid valve mechanism, 38
...Solenoid valve mechanism, 41...First pressure relief passage, 44...Second pressure relief passage.

Claims (1)

[Claims] 1 A valve body 20, an inflow side chamber 21 formed within this valve body, an outflow side chamber 22 formed within this valve body, a valve port 24 that communicates these inflow and outflow side chambers, and this valve port. a pressure chamber 28, a pressure receiving body 27 movably housed in the pressure chamber while maintaining liquid tightness and connected to the valve body; A first pressure guiding passage 31 and a second pressure guiding passage 32 that communicate the inflow side chamber and the pressure chamber, and a first pressure relief passage 44 and a second pressure relief passage 4 that communicate with the pressure chamber.
1, a sub-valve 5 that is connected to the first pressure relief passage 44 and opens and closes the first pressure relief passage, and the second
a solenoid valve mechanism 33 that is provided in the pressure guiding passage 32 and opens and closes this pressure guiding passage; and the second pressure relief passage 41 described above.
A solenoid valve mechanism 3 is provided in the pressure relief passage and opens and closes the pressure relief passage.
8, and wherein the first pressure guiding passage 31 and the first pressure relief passage 44 are formed as orifices that limit the amount of fluid flowing.