KR20050018911A - Control valve system for emergency cutoff - Google Patents

Abstract

PURPOSE: A control valve system for shutting off in an emergency is provided to control the valve stably by increasing the responsiveness of the solenoid valve and by adjusting the opening speed or the closing speed of the passage independently. CONSTITUTION: An emergency shutoff control valve system comprises a main valve(100) composed of an inlet(110) connected to a main pipe in series and an outlet(120) discharging fluid to a booster pump and divided into an upper chamber and a lower chamber by a diaphragm to selectively adjust the passage between the inlet and the outlet according to difference of pressure applied to the upper chamber and the lower chamber, a first solenoid valve(200) having an inflow port(210) flowing fluid from a first auxiliary passage and a discharge port(220) discharging fluid to the upper chamber of the main valve, a second solenoid valve(300) having an inlet port flowing fluid in and a discharge port, a third solenoid valve(400) having an inlet port(410) and a drain port(420) draining fluid, a fourth solenoid valve(500) having an inlet port(510) flowing fluid from a fourth auxiliary passage and a drain port(520), and a controller(600) regulating the passage of the main valve by selectively opening and closing the solenoid valves and controlling operation of the pump.

Description

Control valve system for emergency cutoff

The present invention relates to an emergency shutoff control valve system, and more particularly, to an emergency shutoff control valve system that detects this in case of a power failure or leakage and cuts off the valve promptly, thereby preventing damage caused by power failure or leakage in an unmanned system such as a pressurized field. It is about.

In general, water supply systems send water from a pressurized plant to a high altitude basin to supply water to low-demand demand in a natural fall-off manner.

At this time, if the pump suddenly stops due to a power failure such as a power failure, the pump may be damaged due to surge phenomenon due to reverse flow. Therefore, a safety valve such as a water shock prevention valve is installed on the pump outlet side to prevent the surge. Although it can protect, there is almost no device to prevent the surge occurring on the inlet side of the pump.

Therefore, in case of damage to the pump, piping, and auxiliary facilities due to the surge occurring on the inflow side of the pump, it is directly connected to the flooding of the pump station, road damage, and so on. Problem occurs.

An object of the present invention is to provide an emergency shut-off control valve system to prevent damage caused by power outage or leakage in unmanned systems, such as a pressurized field by detecting the power failure or leakage when the leak occurs. There is this.

Emergency shutoff control valve system according to the present invention for achieving the above object is provided with an inlet connected to the main pipe in series and an outlet for discharging to the booster pump to form a flow path, the diaphragm by the upper chamber and the lower chamber mutually A main valve that is separated and selectively controls a flow path between the inlet and the outlet according to a difference in pressure acting on the upper and lower chambers; A first solenoid valve comprising an inlet port through which a fluid is introduced through a first auxiliary passage connected to an auxiliary inlet hole formed at an inlet of the main valve, and a discharge port through which the introduced fluid is discharged into an upper chamber of the main valve; A second solenoid valve including an inlet port through which fluid is introduced through a second auxiliary channel connected to the first auxiliary channel, and a discharge port through which the introduced fluid is discharged into the lower chamber of the main valve; A third solenoid valve including an inflow port through which fluid is introduced from a third auxiliary flow path connected to the upper chamber of the main valve, and a drain port through which the introduced fluid is drained to the atmosphere; A fourth solenoid valve including an inflow port through which a fluid flows from a fourth auxiliary flow path connected to the lower chamber of the main valve, and a drain port through which the flow of fluid flows into the atmosphere; And a controller for controlling the operation of the pump while controlling the flow path of the main valve through the selective opening and closing operations of the first, second, third and fourth solenoid valves.

The main valve may include a valve body having an inlet and an outlet to form a flow path; An intermediate plate coupled to the opening of the upper portion of the valve body and having a first lower communication hole communicating with the second auxiliary channel on one side thereof, and a second lower communication hole communicating with the fourth auxiliary channel on the other side thereof; A cover plate having a first upper communication hole coupled to an upper part to communicate with the first auxiliary channel on one side thereof, and a second upper communication hole to communicate with the third auxiliary channel on the other side thereof; A diaphragm interposed between the cover plate and separated into an upper chamber and a lower chamber, a diaphragm plate mounted on the diaphragm, a plunger supported by the diaphragm plate and moving up and down according to a vertical movement of the diaphragm, and an upper side of the plunger A control shaft coupled to the valve body and coupled to a lower side of the plunger according to a lifting movement; And a diaphragm assembly comprising a disk seat for opening or closing a flow path between an inlet and an outlet, and an elastic spring for opening and closing the flow path between the inlet and the outlet between the middle plate and the disc seat of the main valve and adjusting the pressure. It is done.

The controller may be configured to control the operation of the pump by receiving a signal from a limit switch detecting a lifting movement of the adjusting shaft and a sensor detecting a leak when a leak occurs.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a schematic configuration of a control valve system for emergency shutoff according to the present invention.

As shown in the present invention, the inlet 110 connected to the main pipe (L) in series and the outlet 120 for discharging to the booster pump (P) is provided and the upper chamber (S1) and the lower chamber by the diaphragm (144) The main valve 100 is separated from each other by (S2), the auxiliary inlet hole (110a) formed in the inlet 110 of the main valve 100 and the upper chamber (S1) and the lower chamber of the main valve 100 ( First and second solenoid valves (200, 300) for selectively supplying the fluid flowing from the auxiliary flow path connecting between the S2) and the fluid flowing from the auxiliary flow path connected to the upper and lower chambers (S1, S2) And the third and fourth solenoid valves 400 and 500 respectively draining to the atmosphere.

In addition, the upper side of the main valve 100 is provided with a control shaft 149 to move up and down in conjunction with the diaphragm 144, and a limit switch 700 for detecting the lifting movement of the control shaft 149.

And, one side of the housing (H) is additionally installed a sensor (800) for detecting this when the leakage of water supplied from the booster pump (P) and the main pipe (L).

In addition, the operation control of the booster pump (P) by the signal received from the limit switch 700 or the sensor 800, and the first, second, third and fourth solenoid valves (200, 300, 400, The controller 600 for controlling the opening and closing operation of the 500 is provided separately.

Here, the auxiliary inlet hole (110a) formed in the inlet 110 of the main valve 100 is in communication with the upper chamber (S1) of the main valve 100 by a first auxiliary passage p1, the first The auxiliary flow path p1 is separated into the second auxiliary flow path p2 by the connecting member 150 provided on the first auxiliary flow path p1 and communicates with the lower chamber S2 of the main valve 100.

The upper and lower chambers S1 and S2 of the main valve 100 communicate with the third and fourth auxiliary passages p3 and p4, respectively.

On the other hand, the first, second, third and fourth auxiliary passage (p1, p2, p3, p4) is selectively opened and closed by the controller 600, the first, second, third and fourth Solenoid valves 200, 300, 400, 500 are provided respectively.

Here, the first, second, third and fourth solenoid valves 200, 300, 400, and 500 are conventional two-way valves in which opening and closing operations are performed by the controller 600 separately provided. The flow direction of the fluid is appropriately changed by the controller 600.

The first and fourth solenoid valves 200 and 500 are normal open valves, and in the basic state in which there is no signal input by the controller 600, the flow path is opened in the open state. When the signal by 600 is input, the flow path is closed in a closed state.

The second and third solenoid valves 300 and 400 are normal close valves, and in a basic state in which no signal is input by the controller 600, the flow path is closed in a closed state. When the signal by 600 is input, the flow path is opened in an open state.

First, the first solenoid valve 200, the inlet port 210 through which the fluid is introduced through the first auxiliary passage p1, and the introduced fluid into the upper chamber S1 of the main valve 100. It is composed of a discharge port 220 is discharged.

In addition, the second solenoid valve 300 may include an inflow port 310 through which a fluid flows through a second auxiliary flow path p2 connected to the first auxiliary flow path p1, and an inflow of the fluid into the main valve. It is composed of a discharge port 320 is discharged to the lower chamber (S2) of 100.

In addition, the third solenoid valve 400 may include an inlet port 410 through which the fluid is introduced from the third auxiliary passage p3 connected to the upper chamber S1 of the main valve 100, and the introduced fluid is in the atmosphere. The drain port 420 is drained to.

In addition, the fourth solenoid valve 500 may include an inflow port 510 through which the fluid is introduced from the fourth auxiliary flow path p4 connected to the lower chamber S2 of the main valve 100, and the inflow fluid is in the atmosphere. The drain port 520 is drained.

On the other hand, the controller 600 according to the present invention is a central processing unit (CPU) to perform a selective opening and closing operation command of the first, second, third and fourth solenoid valves (200, 300, 400, 500) And a valve operation unit for switching the flow paths of the first, second, third and fourth solenoid valves 200, 300, 400, and 500 according to a command of the central processing unit.

In addition, the controller 600 may be configured to open and close the first, second, third and fourth solenoid valves 200, 300, 400, and 500 through the inlet 110 and the outlet 120 of the main valve. At the same time as controlling the flow path between the, and the limit switch 700 for detecting the lifting movement of the control shaft 149, and when the leakage occurs when receiving a signal from the sensor 800 for detecting the leakage of the booster pump (P) Control of operation.

2 is a view showing the configuration of the main valve of the emergency shutoff control valve system according to the present invention.

As shown in the main valve 100, the inlet 110 is connected in series to the main pipe (L) and the outlet 120 for discharging to the booster pump is provided with a valve body 130 to form a flow path, and Located in the upper side of the valve body 130 and made of a diaphragm assembly 140 to selectively control the flow path to widen or narrow the flow path of the seat portion 131 between the inlet 110 and the outlet 120.

Here, the diaphragm assembly 140 has a guide bushing 141 having a guide hole 141a and is coupled to an opening 132 of the valve body 130 and the intermediate plate 142. 142 includes a cover plate 143 coupled to the top to form an inner chamber therebetween.

One lower communication hole 142a communicating with the second auxiliary passage p2 on one side of the intermediate plate 142, and a second lower communication hole 142b communicating with the fourth auxiliary passage p4 on the other side of the intermediate plate 142. Are respectively provided.

One side of the cover plate 143 has a first upper communication hole 143a communicating with the first auxiliary passage p1, and a second upper communication hole 143b communicating with the third auxiliary passage p3 at the other side. Are respectively provided.

A diaphragm 144 of a flexible material having excellent heat resistance and strength is interposed between the intermediate plate 142 and the cover plate 143 to separate the inner chamber into an upper chamber S1 and a lower chamber S2.

Therefore, the fluid introduced into the first upper communication hole 143a from the auxiliary inlet hole 110a through the first auxiliary channel p1 pressurizes the upper chamber S1 or the second auxiliary channel p2. The fluid introduced into the first lower communication hole 142a pressurizes the lower chamber S2, so that the pressure change applied to the upper chamber S1 and the lower chamber S2, that is, the upper chamber S1 ) And the diaphragm 144 moves up and down as shown by a dotted line in accordance with the difference in pressure acting on the lower chamber S2.

A pair of diaphragm plates 145a and 145b are coupled to upper and lower sides of the diaphragm 144, and a plunger 146 is coupled to the diaphragm plates 145a and 145b to move up and down along the vertical movement of the diaphragm 144. work out.

The plunger 146 is coupled to penetrate through the guide hole 141a of the guide bushing 141 provided in the intermediate plate 142 to guide the lifting movement.

Disc seat 147 for opening or closing the seat 131 is coupled to the seat 131 side end of the plunger 146, the seat 131 according to the lifting movement of the plunger 146 ), The flow path is selectively adjusted.

The cover plate 143 side end of the plunger 146 is provided with a control shaft 149 coupled to the plunger 146 to move up and down in conjunction with the diaphragm 144.

An elastic spring 148 is interposed between the intermediate plate 142 and the disc seat 147 of the main valve 100 to gradually open the flow path between the inlet 110 and the outlet 120 of the main valve 100. In case of emergency or power failure, the main valve 100 is controlled to abruptly shut off.

Looking in more detail the operation of the emergency shutoff control valve system according to the present invention having the above configuration as follows.

Here, Figure 3 is a view showing the usual water flow in the emergency shutoff control valve system according to a preferred embodiment of the present invention, Figure 4 is a flow of water when an abnormal occurrence in the emergency shutoff control valve system according to a preferred embodiment of the present invention It is a diagram showing.

First, as shown in FIG. 3, when the on switch of the controller 600 (see FIG. 1) is pressed, the first solenoid valve 200 communicates with the first inlet hole 110a of the main valve 100. The flow path connected to the upper chamber S1 of the main valve 100 through the auxiliary flow path p1 is closed, and the second solenoid valve 300 is connected to the lower chamber S2 of the main valve 100. The flow path is opened.

At the same time, the third solenoid valve 400 opens the flow path to the third auxiliary flow path p3 connected to the upper chamber S1, and the fourth solenoid valve 400 is connected to the lower chamber S2. The flow path to the auxiliary flow path p4 is closed.

In this case, the fluid in the upper chamber S1 having a lower pressure than the inlet 110 may pass through the drain port 420 of the third solenoid valve 400 through the third auxiliary flow path p3. Drained to atmosphere.

Therefore, when the diaphragm 144 (see FIG. 2) is raised by the pressure of the fluid flowing into the lower chamber S2 through the second auxiliary passage p2, between the inlet 110 and the outlet 120. The disk seat 147 (see FIG. 2) opens the flow path, and the fluid is discharged to the booster pump P. FIG.

At the same time, the control shaft 149 which moves up and down in conjunction with the diaphragm 144 on the upper side of the main valve 100 is raised to come into contact with the limit switch 700, the limit switch 700 is The booster pump P starts to be operated by the controller 600 which receives the detected operation of the booster pump P. FIG.

Meanwhile, in the present invention, the flow path between the inlet port 110 and the outlet port 120 of the main valve 100 via an elastic spring 148 between the intermediate plate 142 (see FIG. 2) and the disk seat 147. The diaphragm 144 is gradually raised by the action of the elastic spring 148 so as to prevent the water hammer phenomenon caused by the rapid opening.

Next, the water flow when an abnormality occurs in the emergency shutoff control valve system according to the preferred embodiment of the present invention.

As shown in FIG. 4, when a signal is received from the sensor 800 that detects a leak when a leak occurs, the first solenoid valve 200 is connected to the auxiliary inlet hole of the main valve 100 by the controller 600. Opening the flow path connected to the upper chamber (S1) of the main valve 100 through the first auxiliary flow path (p1) in communication with (110a), the second solenoid valve 300 is the main valve 100 To close the flow path connected to the lower chamber (S2).

At the same time, the third solenoid valve 400 closes the flow path connected to the third auxiliary flow path p3 through the upper chamber S1, and the fourth solenoid valve 400 is connected to the lower chamber S2. The flow path connected to the fourth auxiliary flow path p4 is opened.

In this case, the fluid in the lower chamber S2 having a lower pressure than the inlet 110 may pass through the drain port 520 of the fourth solenoid valve 500 through the fourth auxiliary channel p4. Drained to atmosphere.

Therefore, when the diaphragm 144 (see FIG. 2) is lowered due to the pressure of the fluid flowing into the upper chamber S1 through the first auxiliary passage p1, between the inlet 110 and the outlet 120. The disk seat 147 (see FIG. 2) closes the flow path to prevent the fluid from being discharged to the booster pump P. FIG.

At the same time, when the control shaft 149 which is in contact with the limit switch 700 descends and is separated from the limit switch 700, the stop signal of the booster pump P detected by the limit switch 700 is detected. Booster pump (P) is to be stopped by the controller 600 received.

Meanwhile, in the present invention, the diaphragm 144 is drastically lowered by the action of the elastic spring 148 through the elastic spring 148 between the intermediate plate 142 and the disk seat 147, so that the main valve The flow path between the inlet 110 and the outlet 120 of the 100 is quickly blocked to prevent further leakage.

On the other hand, during a power outage, the flow path between the inlet port 110 and the outlet port 120 of the main valve 100 is rapidly shut off by a series of operations as described above, so that water is introduced into the booster pump P. This prevents the occurrence of a failure of the booster pump.

As described above, according to the present invention, it is essential to provide an emergency shut-off control valve system to prevent damage caused by power failure or leakage in an unmanned system such as a pressurized station by detecting a power failure or leakage when a leak occurs. It can be seen that it is thought.

And within the scope of the basic technical idea of the present invention, of course, many other modifications are possible to those skilled in the art.

According to the present invention, the following effects are expected.

First of all, when an abnormality such as a power failure or leakage occurs, it detects this and quickly shuts off the valve, thereby preventing damage caused by power failure or leakage in an unmanned system such as a pressurized field.

In addition, it is a very useful invention that can be stably controlled by a quick response by the solenoid valve control and the opening and closing speeds of the flow paths can be individually adjusted to ensure the reliability of the product.

1 is a view showing a schematic configuration of an emergency shutoff control valve system according to the present invention

Figure 2 is a view showing the configuration of the main valve of the emergency shutoff control valve system according to the present invention

3 is a view showing the usual water flow in the emergency shutoff control valve system according to a preferred embodiment of the present invention

4 is a view showing the water flow when an abnormality occurs in the emergency shutoff control valve system according to an embodiment of the present invention

* Description of the symbols for the main parts of the drawings *

100 ... Main valve 110 ... Inlet

120 Outlet 130 Valve body

140 diaphragm assembly 144 diaphragm

146 ... plunger 147 ... disc sheet

148 ... Elastic spring 150 ... Connector

200 ... first solenoid valve 300 ... second solenoid valve

400 ... 3rd solenoid valve 500 ... 4th solenoid valve

600 ... Controller 700 ... Limit Switch

800 ... sensor

Claims (3)

Inlet 110 connected in series to the main pipe (L) and the outlet 120 for discharging to the booster pump is provided to form a flow path, by the diaphragm 144 to the upper chamber (S1) and the lower chamber (S2) A main valve 100 which is separated and selectively controls a flow path between the inlet and the outlet according to a difference in pressure acting on the upper and lower chambers; Inlet port 210 through which the fluid is introduced through the first auxiliary flow path p1 connected to the auxiliary inlet hole 110a formed at the inlet of the main valve, and the discharged fluid is discharged to the upper chamber of the main valve. A first solenoid valve 200 composed of a port 220; It consists of an inlet port 310 through which fluid is introduced through a second auxiliary channel p2 connected to the first auxiliary channel p1, and a discharge port 320 through which the introduced fluid is discharged to the lower chamber of the main valve. A second solenoid valve 300; A third solenoid valve composed of an inlet port 410 through which fluid is introduced from the third auxiliary passage p3 connected to the upper chamber S1 of the main valve, and a drain port 420 through which the introduced fluid is drained to the atmosphere. 400; A second inlet port 510 through which fluid is introduced from the fourth auxiliary passage p4 connected to the lower chamber S2 of the main valve 100, and a drain port 520 through which the introduced fluid is drained to the atmosphere 4 solenoid valve 500; And Controller 600 for controlling the operation of the pump while controlling the flow path of the main valve through the selective opening and closing operations of the first, second, third and fourth solenoid valves (200, 300, 400, 500) Emergency shutoff control valve system, characterized in that consisting of. The method of claim 1, wherein the main valve 100, A valve body 130 provided with an inlet 110 and an outlet 120 to form a flow path; A first lower communication hole 142a coupled to the opening 132 of the upper portion of the valve body and communicating with the second auxiliary passage p2 on one side thereof, and communicating with the fourth auxiliary passage p4 on the other side thereof; 2 an intermediate plate 142 having a lower communication hole 142b and a first upper communication hole 143a coupled to an upper portion of the intermediate plate to form an inner chamber and communicating with the first auxiliary passage p1 at one side thereof. The cover plate 143 is provided with a second upper communication hole 143b communicating with the third auxiliary flow path p3 on the other side, and is interposed between the intermediate plate and the cover plate and separated into an upper chamber and a lower chamber. A diaphragm 144, a diaphragm plate 145a and 145b mounted to the diaphragm, a plunger 146 supported by the diaphragm plate to move up and down in accordance with the vertical movement of the diaphragm, and coupled to an upper side of the plunger. The control shaft 149, and The disk seat 147 coupled to the lower side of the launcher and opening or closing the flow path between the inlet and the outlet of the valve body in accordance with the lifting and lowering, and between the disk plate 142 and the disk seat 147 of the main valve 100. And a diaphragm assembly (140) formed of an elastic spring (148) for opening and closing the flow path between the inlet port (110) and the outlet port (120) to adjust pressure. According to claim 1 or claim 2, wherein the controller 600, the limit switch 700 for detecting the lifting movement of the control shaft 149, and a signal from the sensor 800 for detecting the leak when the leakage occurs Emergency shutoff control valve system, characterized in that for controlling the operation of the pump.