KR20080086037A - A solenoid valve - Google Patents

Abstract

A solenoid valve is provided to stably operate a plunger without deformation due to vibration, impact, or high temperature, thereby remarkably improving durability. A solenoid valve includes a nipple unit(1) and a plunger(10). The nipple unit includes a nipple A(2) and a nipple B(3). The nipple B is connected to a connection passage which is formed at an outer circumferential surface of one end of the nipple A. The plunger is installed to be reciprocated between the nipple unit and a core pipe(20) to connect or block the nipple A to/from the nipple B. The plunger is empty inside to be slid by being inserted into the connection passage, has an opened end, and includes a slide unit(12) and a sealing member(15). The slide unit includes a through hole at a center of the other end of the plunger. The sealing member alternately opens and closes the nipple A and the core pipe through reciprocation of the slide unit by being inserted into the through hole.

Description

Solenoid valve

1 is a perspective view of a plunger installed in a conventional solenoid valve,

2 is a side cross-sectional view showing a state in which nipple B of a conventional solenoid valve communicates with a core pipe;

3 is a side cross-sectional view showing a state in which nipple A and nipple B of a conventional solenoid valve communicate with each other;

4 is an exploded perspective view of the solenoid valve of the present invention;

5 is a cross-sectional view of the plunger installed in the solenoid valve of the present invention;

6 is a side cross-sectional view showing a state in which nipple B of the solenoid valve of the present invention communicates with a core tube;

7 is a side cross-sectional view showing a state in which nipple A and nipple B are in communication with each other of the solenoid valve of the present invention.

Explanation of symbols on the main parts of the drawings

1,100: nipple part 2,102: nipple A

3,103: Nipple B 4,104: Communication path

10,110: plunger 12: slide part

13 through hole 15 sealing member

16: connecting bar 17: opening and closing plate

18: opening and closing plate 19: recessed groove

20,120: core tube 25: yoke

30,130: solenoid 32,132: coil

35: O-ring 40,140: filter

50,150: coil spring 111: fixed part

112: leaf spring 115: opening and closing portion

The present invention relates to a solenoid valve, wherein the plunger can be reciprocated by forming a slide part in a plunger which is reciprocally installed between the nipple part and the core tube to allow the plunger to reciprocate while being slid into the communication path. The present invention relates to a solenoid valve which improves durability of a solenoid valve by facilitating assembly, facilitating assembly, and enabling the plunger to be stably operated even in a vibration, shock or extreme temperature environment.

In general, a solenoid valve is a valve used to control the flow of a fluid or gas, and generates an electromagnetic force by a change of an electrical switch to convert electrical energy into mechanical energy to block or pass the flow of a fluid or gas, or to change the direction. To make it possible.

That is, when electric power is applied, electromagnetic force is generated by the solenoid coil, and the core installed inside the electromagnet becomes an electromagnet, and the plunger is moved by the magnetic force of the core, thereby opening or closing a passage through which a fluid or gas flows or redirecting.

Hereinafter, a conventional solenoid valve will be described with reference to FIGS. 1 to 3.

1 is a perspective view of a plunger of a conventional solenoid valve, Figure 2 is a side cross-sectional view showing a state in which nipple B of the conventional solenoid valve is in communication with the core tube, Figure 3 is a nipple A and nipple of the conventional solenoid valve A side cross-sectional view of a state in which B is in communication is shown.

 As shown in Fig. 2 and 3, the solenoid valve is a nipple portion 100 consisting of nipple A (102) and nipple B (103), plunger 110, solenoid 130 (electromagnet), core tube 120 ) And the filter 140.

The nipple part 100 has a communication path 104 formed on the outer circumferential surface of the nipple A 102, and a nipple B 103 is formed to communicate with the communication path 104.

The filter 140 is coupled to one end of the core tube 120 protruding to the outside.

The plunger 110 is installed to reciprocate between the nipple portion 100 and the core tube 120.

On the other hand, the coil spring 150 is placed between the plunger 110 and the core tube 120, the plunger 110 is installed in an elastically supported state.

As shown in FIG. 1, the plunger 110 is fitted between one side of the portion where the coil 132 of the solenoid 130 is installed and the nipple portion 100, and is fixed to the circular ring shape 111. Is formed, the opening and closing portion 115 is provided in the center of the fixing portion 111, the fixing portion 111 and the opening and closing portion 115 is connected by a plurality of leaf springs 112 are connected.

Hereinafter, the operation of the conventional solenoid valve will be described.

2 illustrates a state in which the plunger 110 is separated from one end of the core tube 120, and in this case, the nipple B 103 of the core tube 120 passes through the communication path 104 and the outer portion of the plunger 110. It communicates with the inner through hole and connects with the external atmosphere.

When the electric switch is turned 'ON' in the above state, electricity flows through the coil 132 installed inside the solenoid 130, and the core tube 120 is magnetized to generate magnetic force.

Therefore, the magnetic force of the core tube 120 attracts the plunger 110 so that the end of the core tube 120 and one end of the opening / closing portion 115 of the plunger 110 come into close contact with each other and the core tube 120 is closed. 102 is to be in communication with the nipple B (103) through the communication path (104).

Accordingly, the flow of fluid is redirected by the reciprocating motion of the plunger 110.

However, the conventional solenoid valve as described above has the following problems.

First, since the fixing part and the opening and closing part of the plunger are weak structures connected by thin plate springs, they can be easily deformed during manufacturing, assembly, or handling, resulting in poor productivity and poor assembly performance. There is a problem that the durability of the plunger is not stable and malfunctions because of high fear of deformation of the plunger under vehicle vibration, shock or extreme temperature.

The present invention has been made to solve the above problems, by forming a slide portion on one side of the plunger to allow the plunger to reciprocate while the slide is inserted into the communication path and sliding, the structure is simple and easy to assemble It is to provide a solenoid valve that can increase productivity by improving yield and operate stably without being easily deformed even under vibration, shock or high temperature extreme environments, thereby significantly increasing durability.

In order to achieve the above object, the present invention is provided with a nipple part provided with a nipple B to communicate with a communication path formed on the outer circumferential surface of one end of the nipple A and the nipple A, the nipple A and the nipple B can communicate or close In the solenoid valve which is provided with a plunger so as to reciprocate between the nipple portion and the core tube, the plunger is inserted into the communication path and the inner side is empty and one end is open so that the plunger is sliding, the through hole is in the center of the other end The sealing member is inserted into the formed slide portion and the through hole and provided to open and close the nipple A and the core tube alternately by a reciprocating motion of the slide portion.

The sealing member of the present invention may be formed in each of the opening and closing plate at both ends of the connecting bar is formed to be inserted into the through hole.

In addition, the opening and closing plate of the present invention may be formed in the recess groove in the center portion of the outer surface to facilitate assembly.

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

Figure 4 shows an exploded perspective view of the solenoid valve of the present invention, Figure 5 shows a cross-sectional view of the plunger installed in the solenoid valve of the present invention.

As shown, the solenoid valve includes a nipple portion 1, a plunger 10, a solenoid 30 (electromagnet), a core tube 20, and a filter 40 composed of nipple A 2 and nipple B 3. It consists of.

The nipple A 2 is bent, and a communication path 4 (shown in FIGS. 6 and 7) is formed at a predetermined thickness while surrounding the outer circumferential surface of the end connected with the plunger 10, and the communication path 4 is The nipple B 3 is formed in communication with one side.

One end of the nipple portion 1 is coupled to the end of the solenoid 30 provided with the coil 32, the core tube 20 provided in the yoke 25 is penetrated through the central portion of the solenoid 30.

At this time, the O-ring 35 is provided inside the yoke 25.

In addition, the filter 40 is coupled to the end of the core tube 20 protruding to the outside.

The core tube 40 penetrates the inside, and a step smaller in diameter than the body is formed on the outer circumferential surface of the end fitted inside the solenoid 30 so that the coil spring 50 can be inserted and supported.

On the other hand, the plunger 10 is installed to reciprocate between the end of the nipple portion (1) and the core tube (20).

As shown in FIG. 5, the plunger 10 has a hollow inner shape, one end of which is open in a container shape, and a through hole of the slide part 12 and the slide part 12 having a through hole 13 formed at the center of the other end. It consists of a sealing member 15 fitted to (13).

On the other hand, the step is formed on the outside of the through hole 13 of the slide portion 12 so that the coil spring 50 can be fitted.

Sealing member 15 is formed on both ends of the circular connecting bar 16, the opening and closing plate (17, 18) of relatively larger diameter than the connecting bar 16 is formed, respectively.

At this time, the opening and closing plate 18 is formed on the outer surface of the opening and closing plate 18 so that the sealing member 15 can be easily inserted into the through hole 13 of the plunger 10. do.

Accordingly, the plunger 10 is slidably inserted into the communication path 4 formed on the outer circumferential surface of the nipple A 2 of the nipple part 1 with the slide part 12, wherein the end of the nipple A 2 is It is inserted into the plunger 10.

On the other hand, the coil spring 50 is fitted between the end of the plunger 10 to which the sealing member 15 is coupled and the core tube 20.

The coil spring 50 is fitted so that one end can be supported by a step formed at the end of the core tube 20, and the other end is fitted by being fitted to a step formed in the plunger 10.

Therefore, the plunger 10 is installed between the nipple portion 1 and the core tube 20 in a state of being elastically supported by the coil spring 50.

Hereinafter will be described in detail the operation of the solenoid valve of the present invention.

6 is a side cross-sectional view showing a state in which the nipple B 3 of the solenoid valve of the present invention communicates with the core tube 20. As shown in the drawing, the plunger 10 has one side of the slide portion 12 communicating therewith. Opening and closing of the sealing member 15 located inside the plunger 10 by the elastic force of the coil spring 50 because it is coupled between the end of the nipple A 2 and the core tube 20 while being inserted into the (4). The outer surface of the plate 17 is in close contact with the end of the nipple A (2).

Therefore, the nipple A (2) is maintained in a closed state by the opening and closing plate 17, the nipple B (3) through the gap formed between the communication path 4 and the outer peripheral surface of the slide portion 12. The nipple B 30 is maintained at the same pressure as the atmospheric pressure by being connected to the outside through the filter tube 40 is communicated with the core tube 20.

At this time, the other end of the nipple B (3) is provided with an actuator (not shown) that is operated by the air pressure to operate the actuator by the atmospheric pressure.

On the other hand, Figure 7 is a side cross-sectional view showing a state in which the nipple A (2) and the nipple B (3) of the solenoid valve of the present invention is in communication.

First, when the switch is turned on and electricity is supplied to the coil 32 of the solenoid 30, an electromagnetic force is generated to magnetize the core tube 20 so that the core tube 20 generates a magnetic force.

At this time, when the generated magnetic force becomes larger than the elastic force of the coil spring 50, the plunger 10 is pulled toward the core tube 20.

Therefore, the plunger 10 is separated from the nipple A 2, and the opening and closing plate 18 of the sealing member 15 coupled to the slide portion 12 of the plunger 10 is in close contact with the circumference of the core tube 20. Thus, the core tube 20 is closed.

Therefore, the nipple A 2 communicates with the communication path 4 and communicates with the nipple B 3 through a gap between the inner circumferential surface of the communication path 4 and the inner surface of the slide portion 12 of the plunger 10. do.

At this time, the other end of the nipple A (2) is provided with a vacuum device (not shown) to maintain a vacuum state, the actuator installed in the nipple B (3) is to be converted to a vacuum state to operate accordingly.

Therefore, the plunger 10 slides by the elastic force of the coil spring 50 and the magnetic force of the core tube 20 while the slide part 12 is inserted into the communication path 4, thereby performing reciprocating nipple A (2). ) And nipple B (3) can be alternately redirected the flow of gas.

Therefore, the structure of the plunger 10 is simple, easy to assemble, and is not easily deformed even under extreme environments such as vibration, shock or high temperature, so that the plunger 10 can be stably operated to increase durability of the solenoid valve. It will be possible.

As described above, the above embodiments are merely described as examples for convenience of description and are not intended to limit the scope of the claims.

As described above, the present invention allows the plunger to reciprocate while being slid while the slide portion of the plunger is inserted into the communication path, so that the structure of the plunger is simple and easy to assemble, thereby increasing productivity due to improved yield. In addition, there is an effect that the durability of the solenoid valve can be significantly increased because the plunger is operated stably without being easily deformed even under vibration, shock, or extreme environments of high temperature.

Claims (3)

A nipple portion provided with nipple B is provided on one side to communicate with a communication path formed on the outer circumferential surface of one end of the nipple A and the nipple A, between the nipple portion and the core tube so as to communicate or close the nipple A and the nipple B. In the solenoid valve which plunger is installed to reciprocate, The plunger, The inner side is empty and one end is opened so as to be inserted into the communication path, and the one end is opened, and the nipple A and the core tube are alternated by the reciprocating motion of the slide part by being inserted into the slide part and the through hole in the central part of the other end. Solenoid valve, characterized in that consisting of a sealing member provided to open and close. The method of claim 1, The sealing member, Solenoid valve, characterized in that each opening and closing plate is formed on both ends of the connecting bar that can be inserted into the through hole. The method of claim 2, The opening and closing plate of the solenoid valve, characterized in that the recessed groove is formed in the center of the outer side to facilitate assembly.

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