KR100858101B1 - Solenoid valve - Google Patents

Abstract

A solenoid valve is provided to prevent an explosion due to fluid by separating a solenoid unit from a valve unit through a diaphragm. A solenoid valve includes a solenoid unit(10) and a valve unit. The valve unit includes a main valve(26), a first restoring spring(26a), a pilot sheet(27), a pilot valve(28), and a second restoring spring(28a). The main valve includes a groove(26-1) for opening and closing a lower end portion of a valve sheet(25). The first restoring spring supplies elastic force to the main valve. The pilot sheet supports vertical motion of a plunger(13), is fixedly supported to a fixing and supporting unit(27a), and guides a stem(133). The pilot valve opens and closes a lower end portion of the pilot sheet while elastically moving by being pressed by the stem interlocking with the plunger. The second restoring spring supplies elastic force smaller than that of the first restoring spring to the pilot valve.

Description

Solenoid Valve

1 is a cross-sectional view showing the configuration of a solenoid valve according to the present invention,

2 is an enlarged cross-sectional view showing a solenoid portion of a solenoid valve according to the present invention;

3 is an enlarged cross-sectional view showing a valve portion of the solenoid valve according to the present invention;

4a and 4b is an operation diagram showing an operating state of the solenoid valve according to the present invention,

5 is an operation diagram showing a crack mode state for removing the sticking phenomenon of the solenoid valve according to the present invention,
6 is a cross-sectional view showing another embodiment of the solenoid valve according to the present invention.

<Description of the symbols for the main parts of the drawings>

10 solenoid part 11 connector

12 solenoid coil 13 plunger

14: permanent magnet 15: magnetic core

16: bush 20: valve portion

21: valve housing 22: inlet

23 outlet 24 chamber portion

25: valve seat 26: main valve

27: pilot seat 28: pilot valve

29 cap 30 diaphragm

31: double O-ring

The present invention relates to a solenoid valve, and more particularly, it is formed of a double valve structure capable of smoothly opening and closing the valve with a small electromagnetic force, so that the size of the solenoid portion can be reduced, and due to the use of a fluid that freezes easily. The present invention relates to a solenoid valve that can prevent the sticking (freezing) of the valve and to eliminate the explosion hazard when using a special fluid (hydrogen).

In general, a general fluid control system that controls fluid flow of an automation device using hydraulic pressure or air pressure, or a refrigerant circulation system of a vehicle fuel supply system or an automation device, a refrigeration device, or a refrigeration device, is an electronic control method. Solenoid valves are widely used as a means for controlling the flow of used fluids such as fuels or refrigerants included.

The solenoid valve is configured to control the flow of the working fluid while opening and closing the orifice by the electromagnetic force generated while the single plunger (a) installed in the inner passage is applied power to the solenoid coil (b) installed on the outer periphery of the inner passage. have.

However, since the solenoid valve has a high electromagnetic pressure or a large amount of electromagnetic force in order to overcome the sticking phenomenon of the valve, a sufficient electromagnetic force is secured by increasing the size of the solenoid valve. However, the size of the solenoid valve Since the method of increasing increases the pressure of the fluid that prevents the opening of the valve, a larger electromagnetic force is required to overcome this and open the valve, thereby causing an increase in power consumption.

In addition, when the fluid used is hydrogen, there is a problem inherent in the risk of explosion due to contact with the solenoid.

Therefore, the present invention has been invented to solve the above problems, it is formed in a double valve structure that can smoothly open and close the control valve with a small electromagnetic force can reduce the size of the solenoid portion, fluid that freeze easily occurs It is to provide a solenoid valve that can prevent the sticking (freezing) of the valve due to the use of, and to eliminate the explosion risk when using a special fluid (hydrogen).

In order to achieve the above object, the present invention provides a connector 11, a solenoid coil 12 wound around a lower end of the connector 11, and an electromagnetic force generated when power is applied, and the solenoid coil 12 is applied with power. Plunger 13 which is lowered by the electromagnetic force generated at the time, the permanent magnet 14 installed in the plunger 13, and the lower end of the plunger 13 is installed on the solenoid coil 12 while supporting the solenoid A solenoid part 10 including a magnetic core 15 to which electromagnetic force generated by the coil 12 is applied; A valve housing 21 having a fluid inlet 22 and an outlet 23 on the left and right sides thereof, and an intermediate position between the inlet 22 and the outlet 23, is provided from the inlet 22 to the outlet 23. The chamber portion 24 is provided with a valve structure for selectively controlling the movement of the moving fluid, and the stem 133 which cooperates with the plunger 13 of the solenoid portion 10 is operated and the chamber portion ( In the solenoid valve consisting of; valve portion 20 comprising a valve seat 25 which is a space for the fluid stored in 24 to move through the valve structure,

The valve portion 20 is supported by the support portion 26b at the lower end of the valve seat 25, the yaw groove 26-1, which opens and closes the lower end of the valve seat 25 while elastically moving. A main valve 26 formed;

A first restoring spring (26a) to prevent the valve from abnormally opening when a back pressure occurs at the inlet (22) of the fluid, and to impart an elastic force to the main valve (26);

A pilot seat (27) mounted to an inner passage of the valve seat (25) to support the up and down flow of the plunger (13) and to be fixed to the fixed support (27a) and to guide the stem (133);

The pilot seat is installed in the recess 26-1 of the main valve 26 and installed at the lower end of the pilot seat 27, and is pressed by the stem 133 interlocking with the plunger 13 to elastically move the pilot seat. A pilot valve 28 for opening and closing the lower end of the 27;

The pilot valve 28 is characterized in that it is a double valve structure including a second restoring spring (28a) to impart an elastic force less than the elastic force of the first restoring spring (26a).

In a preferred embodiment, the solenoid portion 10 is characterized in that the explosion-proof sealing structure for sealing the entire circumferential surface of the solenoid coil 12.

In particular, the solenoid portion 10 and the valve portion 20 is characterized in that the diaphragm 30, which is a separating means, is mounted therebetween so as to be separated from each other.

Hereinafter, the configuration of the present invention with reference to the accompanying drawings in detail.

1 is a cross-sectional view showing the configuration of a solenoid valve according to the present invention, Figure 2 is an enlarged cross-sectional view showing a solenoid portion of a solenoid valve according to the present invention, Figure 3 is an enlarged cross-sectional view showing a valve portion of a solenoid valve according to the present invention to be.

4A and 4B show an operating state of the solenoid valve according to the present invention, FIG. 5 is an operation diagram showing a crack mode state for removing the sticking phenomenon of the solenoid valve according to the present invention, and FIG. Sectional drawing which shows another embodiment of the solenoid valve which concerns on it.

As shown in FIG. 1, when the power is not applied, the plunger 13 reciprocates by the electromagnetic force in a state where the fluid is always blocked, thereby allowing the fluid to move freely. In a normal close valve, a preferred embodiment according to the present invention is divided into a solenoid portion 10 for driving a valve structure and a valve portion 20 for moving fluid.

Here, since the solenoid portion 10 is similar or the same as the conventional general valve driving means, it will be briefly described. As shown in FIG. 2, the solenoid portion 10 is wound around the connector 11 and the lower end of the connector 11 to supply power. Solenoid coil 12 which generates an electromagnetic force upon application, a plunger 13 which is lowered by an electromagnetic force generated when power is applied to the solenoid coil 12, and a permanent magnet 14 installed inside the plunger 13 And a magnetic core 15 installed at the lower end of the plunger 13 to support the solenoid coil 12 and receive the electromagnetic force generated by the solenoid coil 12.

When the solenoid portion 10 having the above configuration is supplied with power to the solenoid coil 12, the plunger 13 has a head 133a of the stem 133, which will be described later, and a pilot valve 28. When the power is not supplied to the solenoid coil 12, the plunger 13 lifts the head 133a of the stem 133 away from the pilot valve 28. It is configured to.

At this time, in the preferred embodiment of the present invention to support the bar (131) in the upper and lower bars (131) in order to facilitate the lifting operation of the plunger 13 (bush) (16) Is provided.

Thus, the lower end of the solenoid portion 10 for opening and closing the valve through the lifting operation of the plunger 13, the valve portion 20 is configured, as shown in Figure 3, the inlet of the fluid 22 ) And the valve housing 21 having the outlet 23 on the left and right sides, and the movement of the fluid which is provided at an intermediate position between the inlet 22 and the outlet 23 and moves from the inlet 22 to the outlet 23. The chamber portion 24 is provided with a valve structure for selectively controlling the fluid and the fluid stored in the chamber portion 24 while the stem 133 interlocking with the plunger 13 of the solenoid portion 10 operates. The valve unit 20 is configured to include a valve seat 25 in which a space in which the movable member moves through the valve structure is formed.

Here, a diaphragm as a separation means is provided between the solenoid portion 10 and the valve portion 20 so as to suppress the risk of explosion due to contact with the solenoid portion 10 when using a special fluid (explosive fluid). 30 is installed to serve to separate the two main components, wherein the solenoid portion 10 and the valve portion 20 is separated from each other boundary of the tappet 132 and the stem 133 Are in surface contact with each other, and the stem 133 is coupled to the central portion of the diaphragm 30 so as to be interlocked with the diaphragm 30 to move up and down.

In addition, in order to prevent the risk of explosion due to spark generation in the solenoid coil 12 in which the electromagnetic force is generated, it is made of an explosion-proof sealing structure that seals the entire circumferential surface thereof.

On the other hand, in the preferred embodiment according to the present invention, the valve structure of the valve unit 20 implemented a double valve structure to minimize the power consumption required for the operation of the valve structure when using a high pressure fluid, Figure 3 4A and 4B, the lower end of the valve seat 25 is supported by the support part 26b and opens and closes the lower end of the valve seat 25 while elastically moving. (Iii) a first restoration for providing an elastic force to the main valve 26 to prevent the valve from abnormally opening when a back pressure occurs at the inlet 22 of the main valve 26 and the groove 26-1. In the basic technical configuration of the spring 26a, the main valve 26 is installed in the recess 26-1 of the main valve 26 and installed at the lower end of the pilot seat 27 for guiding the stem 133. 13) in conjunction with the stem 133 The pilot valve 28 that opens and closes the lower end of the pilot seat 27 while being elastically moved by the additional configuration allows the valve structure to be opened smoothly with only a small electromagnetic force generated by the solenoid part 10.

The valve structure consisting of the double valve structure is mounted on the internal passage of the valve seat 25 and serves as a guide function of the stem 133 and a moving passage function of the fluid, and at the same time a fixed support for fixing and supporting the pilot seat 27 ( 27a).

At this time, the end of the pilot seat 27 is formed with a flange (27-1) protruding outward has a function to seal the groove (26-1) formed in the center of the main valve (26).

The pilot seat may be operated in the operating area in which the head part 133a of the stem 133 operates, that is, the lower end of the pilot seat 27 while lifting and lowering by the pressing force of the head part 133a of the stem 133. 27 is provided with a pilot valve 28 for opening and closing the lower end of the lower end of the second restoring spring (28a) to impart an elastic force less than the elastic force of the first restoring spring (26a) to the pilot valve (28) It is provided in close contact with.

Here, the elastic force of the second restoring spring 28a located at the lower end of the pilot valve 28 is significantly smaller than that of the first restoring spring 26a and the plunger 13 due to the small electromagnetic force of the solenoid coil 12. It is also set to be able to move elastically easily through the descent operation.

On the other hand, reference numeral 29 is a removable cap to facilitate the assembly and maintenance of the parts.

Hereinafter, the operation principle of the solenoid valve according to the present invention configured as described above and the movement of the fluid according to it will be described.

It prevents abnormal opening of the valve according to the pressure of the fluid flowing through the inlet 22, and the valve structure is initially closed by the elastic force of the first restoring spring 26a supporting the main valve 26. (normal close valve).

When power is supplied to the solenoid coil 12, the plunger 13 is moved downward so that the stem 133 linked thereto is also moved downward along the pilot seat 27.

Due to the movement of the stem 133, the head part 133a presses the pilot valve 28, and at the same time, the pilot moves over to overcome the elastic force of the second restoring spring 28a located at the lower end thereof. The pilot valve 28, which is in close contact with the lower end of the seat 27 and is blocking the flow path through which the fluid can flow, moves downward with respect to the pilot seat 27, so that the pilot seat 27 and the pilot valve are moved. A gap is formed between the 28, whereby a small amount of fluid introduced into the inlet 22 passes through the gap between the main valve 26 and the pilot valve 28, and at the same time the pilot seat 27 and the stem 133. It moves to the outlet 23 through the gap between the head portion 133a of the bar), and fills the inside of the valve seat 25 at its intermediate position (see Fig. 4A). At this time, the main valve 26 and the pilot valve 28, and the head portion 133a of the pilot seat 27 and the stem 133 is formed with a gap (gap) due to their respective diameter difference, The gap is as shown in the same configuration formed in a general solenoid valve, and as shown in Figs. 4a and 4b, it can be seen that it is obviously derived in the flow of the fluid.

Thereafter, in the state where the head portion 133a is pressing the pilot valve 28, the space on the upper and lower ends of the main valve 26 due to the opening of the pilot valve 28 with respect to the pilot seat 27, namely, When the fluid pressure of the chamber portion 24 and the valve seat 25 is equally acting, the first restoring spring 26a is compressed due to the pressing force of the head portion 133a, and thus the lower end of the valve seat 25. The main valve 26, which is in the state of blocking the flow path through which the fluid can flow, moves to the position to open the flow path, which flows through the inlet 22 and enters the chamber part 24. A large amount of fluid in the stored state can be moved to the outlet 23 through the open flow path (see FIG. 4B).

On the other hand, the blocking operation of the valve structure is performed in the reverse order of the opening operation. When power is not supplied to the solenoid coil 12, the plunger 13, which has lost electromagnetic force, returns to its original position, thereby causing the stem 133 and the The diaphragm 30 which was in close contact with the circumference of the stem 133 also moves to its original position.

That is, the diaphragm 30 which separates the solenoid portion 10 and the valve portion 20 to block the movement of the fluid is interlocked with the operation of the stem 133 connected to the plunger 13 at its mounting position. .

On the other hand, as shown in Figure 6, in another embodiment according to the present invention, by removing the diaphragm 30 as a separating means for separating the solenoid portion 10 and the valve portion 20, instead of the valve By inserting a double O-ring 31 inside the seat 25 to block fluid movement, substantially the same function as the diaphragm 30 can be realized.

In this way, when the stem 133 is returned to its original position, the pilot valve 28 also returns to its original position due to the elastic force of the second restoring spring 28a to block the pilot seat 27 and at the same time the main valve ( 26 is also returned through the elastic force of the first restoring spring (26a) so that the valve structure is positioned in the same state as the initial state, and thus the fluid movement to the outlet 23 is blocked so that the normal close valve state Will be placed in.

At this time, the fluid filled in the valve seat 25 is discharged through the outlet 23 to increase the pressure of the chamber 24, the air due to the back pressure of the first and second restoring spring (26a, 28a) Inflow can be prevented.

As such, even the small electromagnetic force of the solenoid coil 12 makes it possible to easily open the entire valve structure.

Meanwhile, another function of the solenoid valve according to the present invention, that is, a function of removing the fluid when the fluid is stuck inside the solenoid valve will be described with reference to FIG. 5.

The present invention is made of an impulse type plunger 13 capable of eliminating condensation, that is, condensation, of a fluid generated due to the characteristics of the fluid and the surrounding atmosphere, as in the conventionally known art. ), The bars 131, the tappets 132, and the stems 133 are coupled to each other to operate together, while the plungers 13 supported around the bars 131 are the bars 131 and The bar is coupled to be slidably downward along the circumference of the permanent magnet 14, and is slidably downward while being separated from the permanent magnet 14 located at the upper end thereof.

In the impulse type plunger 13, in the solenoid valve according to the present invention, the operation mode of the plunger 13 is a normal mode indicating a normal operation state without the fluid sticking phenomenon as usual. ) And a crack mode that eliminates the sticking phenomenon of the fluid.

That is, when the tappet 132 is not operated due to the sticking (freezing) of the fluid generated between the magnetic core 15, the plunger 13 is switched to the crack mode to operate, wherein the solenoid coil If the electromagnetic force of the magnetic core 15 becomes greater than the magnetic force of the permanent magnet 14 due to the increase of the power continuously supplied to (12), this causes the plunger 13 to beat the magnetic force of the permanent magnet 14 and then The lower central portion of the plunger 13 hits the upper portion of the tappet 132 while leaving downward, while sliding down.

Such a blow drive is continuously and repeatedly driven until the sticking phenomenon of the valves 26 and 27 or the tappet 132 is removed, thereby eliminating the sticking phenomenon.

Therefore, the present invention not only removes the risk of explosion due to a special fluid by separating the solenoid portion 10 and the valve portion 20 through the diaphragm 30, but also like the conventionally known technology, the solenoid portion ( 10) is formed of an impulse type, when the valves 26 and 27 or the tappets 132 are not operated due to the sticking of the fluid, it may be switched to the crack mode to solve the inoperable state of the valve structure. The unit 20 has a double valve structure including the pilot seat 27 and the pilot valve 28 to operate the valve structure even with a small electromagnetic force, thereby miniaturizing the size of the solenoid portion 10.

As described above, according to the solenoid valve according to the present invention, it is possible to eliminate the risk of explosion when using a special fluid (hydrogen), and to have a double valve structure that is operated through a small electromagnetic force can reduce the size of the solenoid portion. As a result, volume and weight can be reduced.

In addition, there is an effect that can solve the inoperability of the valve structure and the rise in temperature when the valve (sticking) phenomenon occurs.

Claims (8)

A connector 11, a solenoid coil 12 wound around a lower end of the connector 11 to generate an electromagnetic force when power is applied, and a plunger 13 lowered by an electromagnetic force generated when power is applied to the solenoid coil 12. ), A permanent magnet 14 installed inside the plunger 13, and a lower end of the plunger 13 to receive the electromagnetic force generated from the solenoid coil 12 while supporting the solenoid coil 12. A solenoid portion 10 including a magnetic core 15; A valve housing 21 having a fluid inlet 22 and an outlet 23 on the left and right sides thereof, and an intermediate position between the inlet 22 and the outlet 23, is provided from the inlet 22 to the outlet 23. The chamber portion 24 is provided with a valve structure for selectively controlling the movement of the moving fluid, and the stem 133 which cooperates with the plunger 13 of the solenoid portion 10 is operated and the chamber portion ( In the solenoid valve consisting of; valve portion 20 comprising a valve seat 25 which is a space for the fluid stored in 24 to move through the valve structure, The valve portion 20 is supported by the support portion 26b at the lower end of the valve seat 25, the yaw groove 26-1, which opens and closes the lower end of the valve seat 25 while elastically moving. A main valve 26 formed; A first restoring spring (26a) to prevent the valve from abnormally opening when a back pressure occurs at the inlet (22) of the fluid, and to impart an elastic force to the main valve (26); A pilot seat 27 mounted in the valve seat 25 to support the up and down flow of the plunger 13 and at the same time being fixed to the fixed support 27a and guiding the stem 133; The pilot seat is installed in the recess 26-1 of the main valve 26 and installed at the lower end of the pilot seat 27, and is pressed by the stem 133 interlocking with the plunger 13 to elastically move the pilot seat. A pilot valve 28 for opening and closing the lower end of the 27; Solenoid valve, characterized in that the pilot valve (28) comprising a second restoring spring (28a) for imparting an elastic force less than the elastic force of the first restoring spring (26a). The method of claim 1, The plunger (13) is a solenoid valve, characterized in that it comprises a bush (16) for supporting the bar (131) therein in the upper and lower double. The method of claim 1, The solenoid valve 10 is a solenoid valve, characterized in that made of an explosion-proof sealing structure for sealing the entire circumferential surface of the solenoid coil (12). The method of claim 1, The pilot seat (27) is characterized in that the solenoid valve characterized in that the flange (27-1) protruding outward so as to seal the groove (26-1) of the main valve (26) at its end. The method of claim 1, Solenoid valve, characterized in that the solenoid portion 10 and the valve portion 20 is separated therebetween so that the separation means is separated from each other. The method of claim 5, The separation means is a solenoid valve, characterized in that the diaphragm (30). The method of claim 1, Solenoid valve, characterized in that the double O-ring (double O-ring, 31) is inserted into the valve seat 25 to block the movement of the fluid generated between the solenoid portion 10 and the valve portion 20. The method of claim 5, In a state where the solenoid portion 10 and the valve portion 20 are separated from each other, the boundary portions of the tappet 132 and the stem 133 are in surface contact with each other, and the stem 133 is interlockable with the diaphragm 30. Solenoid valve, characterized in that the upper end is coupled to the center of the diaphragm (30).

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