JPH02275190A - Switching valve device - Google Patents

Abstract

PURPOSE:To open and close a switching valve device from the outside by installing a sub valve which opens and closes the first pressure discharging passage, a solenoid valve which opens and closes the second lead passage and a solenoid valve which opens and closes the second pressure discharging passage. CONSTITUTION:In addition to the first lead passage 31 which communicates a pressure chamber 28 and an inflow side chamber 22 with each other, the second lead passage 32 is formed. In addition to the first pressure discharging passage 41 which communicates the pressure chamber 28 and a sub valve 5 with each other, the second pressure discharging passage 44 is formed. There is provided solenoid valves 33, 38 to switch the second lead passage 32 and the second discharging pressure 44. It is thus possible to open and close a switching valve device 2 from the outside, regardless of the sub valve 5 opened or closed, by opening and closing these solenoid valves.

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, for example, on-off valve devices for water supply facilities and the like include 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. This kind of on-off valve device is
It is equipped with a pressure chamber and a pressure receiving body movably provided within this pressure chamber, and by opening and closing the above-mentioned sub-valve, the pressure within this pressure chamber is changed, thereby moving the above-mentioned pressure receiving body, and this The valve body is configured to open and close by moving the pressure receiving body. Therefore, such conventional methods are 1,
The opening/closing valve device cannot be operated other than by opening/closing this sub-valve. Therefore, if this sub-valve malfunctions, or if a foreign object is caught between the valve body and the valve seat of this on-off valve device, it is impossible to manually open or close this on-off valve device from the outside. Therefore, in such cases, the on-off valve device must be disassembled, which is extremely inconvenient.

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

[Means for Solving the Problems] The present invention forms a second pressure passage in addition to the first pressure passage that communicates the pressure chamber and the inflow side chamber, and also connects the pressure chamber and the sub-valve. In addition to the first pressure relief passage that communicates with each other, a second pressure relief passage is formed, and a solenoid valve is provided to open and close the second pressure guiding passage and the second pressure relief passage.

[Operation] Therefore, by opening and closing these solenoid valves,
This opening/closing valve device is opened and closed from the outside regardless of whether the above-mentioned sub-valve is open, 1 or closed. It is something that can be done. .

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

FIG. 1 shows the overall configuration of this system.

1 in the figure is a water tank, and the water tank 1 is configured to be supplied with water via a water supply pipe 3.

An on-off valve device 2 is provided in the middle of this water supply pipe 3, and is configured to control water supply into this 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 within this water tank 1 and is configured to detect the water level within this water 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 a valve body, and this valve body 20
An inlet chamber 21, which is a high pressure side, and an outlet chamber 22, which is a low pressure side, are formed in the chamber.

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. A pressure receiving body 27 is housed within this pressure chamber 28 . This pressure receiving body 27 is movably housed in the pressure chamber 28 while keeping water inside. Moreover, this pressure receiving body 27
The back side of the is formed into two atmospheric pressure chambers, and this atmospheric pressure chamber 29
communicates with the atmosphere via an atmosphere communication passage 30. This pressure receiving body 27 is connected to the above-mentioned valve body 25 via the valve shaft 26.
is connected to. 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. In addition to this first pressure passage 31, a second pressure passage 3
2 is formed, 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, and this valve body 34 is biased in the valve closing direction by a spring. The valve body 34 is configured to open when the solenoid 35 of the electromagnetic valve mechanism 33 is energized. 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. Moreover, apart from this first pressure relief passage 44, a second pressure relief passage 4 is provided.
1 is formed, and this second pressure relief passage 41 communicates the above-mentioned pressure chamber 28 and the above-mentioned outflow side chamber 22. A solenoid valve mechanism 38 is provided in the middle of this second pressure relief passage 41. This electromagnetic valve mechanism 38 includes a valve body 39 that opens and closes this second pressure relief passage 41, and this valve body 39 is biased by a spring in the valve closing direction.

The valve body 39 is configured to open when the solenoid 40 of the electromagnetic valve mechanism 38 is energized. In addition, 37 is a stopper, Comprising: By adjusting this stopper 37, it is comprised so that the stroke of the said 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. Furthermore, when the sub-valve 5 is opened, the pressure in the pressure chamber 44 is released through the first pressure relief passage 44 and the pressure relief pipe 4, so that the pressure in the pressure chamber 28 is reduced. and acts on the lower surface of the valve body 25 mentioned above. This valve body 25 is pushed up by the pressure of the inflow side chamber 21 and opens. Furthermore, when the sub-valve 5 is closed, the pressure introduced through the pressure guiding passage 32 is accumulated in the pressure chamber 28, and the pressure receiving body 27 is pushed down by this pressure, and the valve body 25 is pushed down by this pressure. is pushed down, and this on-off valve device closes.

Further, the configuration of the control device 7 of the water supply system using such an on-off valve device will be explained with reference to the third example. 5 in the diagram
0 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. The water level control section 62 is composed of a flip-flop circuit, and is connected to the commercial power supply 53 via the power supply section 61. Low water level signal S1 from the water level detector 6
is input, the relay 63 is energized by the signal from the water level control unit 62, and the contact 63 of this relay is energized.
a is closed, the solenoid 5a of the sub-valve 5 is energized, and the 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 tank 1 via the water supply pipe 3.

When the water level in the aquarium 1 rises and reaches a predetermined water level, a high water level signal S2 is sent from the water level detector 6 to the water level control section 62, and the relay 63 is demagnetized. The contact 53a is opened, the solenoid 5a of the sub-valve 5 is demagnetized, 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, this control device 7 also has the following information: If, for example, the valve body 25 of the on-off valve device 2 gets stuck with a foreign object, or the sub-valve 5 breaks down, the water supply cannot be stopped and the water in the water tank 1 becomes inoperable. An abnormal water level control section 65 is provided to deal with the case where the water level rises abnormally. This abnormal water level control section 65 receives an abnormal water level signal S3 from the above water level detector 6.
When the power is applied manually, the relay 64 is energized and the contact 64a of this relay is closed. By closing this contact 64a, power is supplied to the alarm buzzer 57, which outputs an alarm and also lights up the alarm lamp 58. Note that 56 is a buzzer stop switch, and by opening this switch, the sounding of the buzzer can be stopped. In addition, the above relay 64
The relay 60 is configured to be energized by opening the contact 64a. This relay 60 has a timer 5.
9 are connected in series. This timer 59 is activated by being energized, and after a predetermined short period of time has elapsed, the timer 59 is configured to open its contacts and cut off the energization. Further, this relay 60 is provided with a normally open contact 60a1 and a normally closed contact 60b, and this normally open contact 60a is connected to the solenoid valve mechanism 3 of the second pressure relief passage 41 of the on-off valve device 2.
The normally closed contact 60b is connected to the solenoid 35 of the electromagnetic valve mechanism 33 of the second pressure guiding passage 32.

Therefore, when the abnormal water level signal S3 is manually generated, the contact 64a of the relay 64 is closed, and the alarm buzzer 5
7 sounds and the alarm lamp 58 stops. At the same time, the relay 60 is energized, and its contacts 60
When the contact 60b is closed, the contact 60b is opened. Therefore, the electromagnetic valve mechanism 38 of the on-off valve device 2 is opened, and the pressure in the pressure chamber is released through this second pressure release passage.

Therefore, this IMI valve closing device 2 opens and its valve body 25 rises. As a result, this valve body 25 and the valve port 2
Water flows between the valve element 25 and the valve element 25, and foreign objects caught in the valve element 25 are removed. Next, when a predetermined period of time has elapsed, the timer 59 is activated, the power supply to the relay 60 is cut off, the contact 60a is opened, and the contact 60b is closed. Therefore, the solenoid valve mechanism 38 of the second pressure relief passage 41
is closed, blocking this second pressure relief passage, and the second pressure relief passage is closed.
The electromagnetic valve mechanism 33 of the pressure guiding passage 32 opens, and pressure is introduced into the pressure chamber 28 through this second pressure guiding passage. , Therefore, this on-off valve device 2 is again in the closed state. If the above-mentioned auxiliary valve 5 fails and is not closed, and this opening/closing valve device 2 is not closed due to this, this pressure chamber 28 is opened via the first pressure relief passage 44. Although remaining open to the outside, this first pressure relief passage 44 has a small diameter and acts as an orifice that limits the flow of water, and within this pressure chamber 28 there are first and second pressure relief passages. 32
Since high-pressure water is introduced through the pressure chamber 28, pressure is accumulated in the pressure chamber 28, and 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, even if the valve body of this on-off valve device gets caught in a foreign object and does not close completely, 1 or the auxiliary valve 5 fails and does not close, , this 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. Its effects are great, such as being extremely convenient in the event of a breakdown or maintenance/inspection.

[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 . Second pressure passage, 33...
Solenoid valve mechanism, 38... Solenoid valve mechanism, 41... First pressure relief passage, 44... Second pressure relief passage. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] A valve body, an inlet chamber formed in the valve body, an outlet chamber formed in the valve body, a valve port that communicates the inlet chamber and the outlet chamber, and a valve seated on the valve port. A valve body that opens and closes a valve port, a pressure chamber, a pressure receiving body movably housed in this pressure chamber in a fluid-tight manner and connected to the valve body, and the inflow side chamber and the pressure chamber. a first pressure relief passage and a second pressure relief passage that communicate with each other; a first pressure relief passage and a second pressure relief passage that communicate with the pressure chamber; and a first pressure relief passage that communicates with the first pressure relief passage; A sub-valve that opens and closes this first pressure relief passage, a solenoid valve that is provided in the second pressure passage and opens and closes this pressure passage, and a solenoid valve that is provided in the second pressure relief passage and that opens and closes this pressure relief passage. An on-off valve device comprising a solenoid valve that opens and closes a passage.