KR101430719B1 - Pilot type solenoid valve - Google Patents

Abstract

The present invention relates to a pilot type solenoid valve having a coaxial flow path type flow path structure and more particularly to a coaxial flow path type flow path structure in which a coaxial flow path type flow path structure is formed inside a body portion connected to a piping, The first, second, and third connection flow paths are connected to each other to connect and disconnect the first, second, and third connection flow paths to open and close the flow path while the valve trim of the pilot chamber moves back and forth. The valve trim is retracted by the generation of the pressure difference to open the valve, the fluid in the inlet port is supplied to the pilot chamber, and the valve trim is advanced by the unbalance of the force due to the elastic force of the kick- Compared with the method of opening and closing by the flame, the displacement of the valve trim is sufficient, It is small, large flow rate, wide range of pressure limit of pilot chamber is large, and it is possible to manufacture large valve, and it is easy to switch between normally closed type and open type according to solenoid type actuator installation direction connected to 1st, It is easy to cope with design change and format change, and it provides excellent flexibility in management before production, distribution and installation.

Description

[0001] The present invention relates to a pilot type solenoid valve having a coaxial streamline flow path structure,

The present invention relates to a pilot type solenoid valve having a coaxial flow path type flow path structure and more particularly to a coaxial flow path type flow path structure in which a coaxial flow path type flow path structure is formed between an inlet port and an outlet port of a body portion connected to a pipe, And the first, second, and third connection flow paths are connected to the first and second connection flow paths so that the valve trim of the pilot chamber moves back and forth while opening and closing the flow path. The fluid in the pilot chamber is discharged through the flow path, The valve trim is retracted by the generation of the pressure difference on the chamber side to perform the opening operation and the fluid in the inlet port is supplied to the pilot chamber and the valve trim is advanced by the unbalance of the force due to the elastic force of the kick- Compared to the way in which the diaphragm opens and closes in the structure, the displacement of the valve trim It is possible to manufacture a large valve because the pressure loss is small and the flow rate is large and the pilot chamber has a wide pressure limit range. In addition, the solenoid type actuator connected to the first, The present invention relates to a pilot type solenoid valve having a coaxial flow path type flow path structure which can easily cope with design changes and type changes and is excellent in flexibility in management in production, distribution, and installation stages.

In general, a piping to which a fluid or the like is transported is provided with an opening / closing valve for controlling the flow of the fluid.

In particular, the pilot type solenoid valve has an inlet port and an outlet port, and a pilot chamber between the inlet port and the outlet port is connected by an orthogonal flow path, The diaphragm above the pilot chamber ascends and descends to open and close the flow path.

However, the conventional pilot type solenoid valve has the following problems.

First, the conventional pilot type solenoid valve has a problem that the flow rate is small because the flow path is orthogonal and the diaphragm displacement at the top of the pilot chamber is small and the pressure loss is large.

Second, there is a problem that it is difficult to manufacture a large valve due to the pressure limit of the diaphragm.

Thirdly, there is a problem that a valve phenomenon, that is, a valve phenomenon repeatedly repeatedly opened and closed by a magnetic force occurs in a specific mounting posture of the valve due to the small flow rate of the valve.

Fourth, there is no separate means for visually confirming the open / close state of the valve, so that there is a problem that the reliability of the operation confirmation is poor.

SUMMARY OF THE INVENTION The present invention has been accomplished to solve the above problems of the prior art, and it is an object of the present invention to provide a coaxial streamlined channel structure between an inlet port and an outlet port of a body part, And connecting and connecting the three connecting flow paths and connecting and disconnecting them, the valve trim of the pilot chamber moves forward and backward to open and close the flow path. By discharging the fluid in the pilot chamber to the flow path and generating a differential pressure on the inlet side and the pilot chamber side The valve trim is retracted to open the valve, the fluid in the inlet is supplied to the pilot chamber, and the valve trim is advanced by the unbalance of the force due to the elastic force of the kick-off spring. The displacement of the valve trim is sufficient compared with the operating method, the pressure loss is small, the flow rate is large, The pressure range of the pilot chamber is wide, so large valves can be manufactured. In addition, solenoids connected to the first, second, and third flow paths can be switched between normally closed type and open type depending on the mounting direction of the actuator. And it provides the excellent flexibility of management in all stages of production, distribution and installation.

A check valve for controlling the unidirectional discharge of the fluid is provided in the third connection path connected to the flow path so that the flow of the flow path of the valve can be prevented from flowing back at least to the pilot chamber irrespective of the mounting posture of the valve, And it is an object of the present invention to provide an improved use efficiency by preventing the valve surging, that is, the closing of the valve.

The present invention provides a speed control valve for controlling the supply of the fluid to the first connection channel connected to the flow path, thereby controlling the opening and closing speed of the valve due to the back and forth movement of the valve trim during the valve opening and closing operation. The purpose is to minimize.

The present invention relates to a pilot type solenoid valve, which comprises an outer body having an inlet and an outlet at both sides thereof, and a body having a double structure in which an inner body, which is provided inside the outer body and forms a coaxial stream- And the inner body is opened at one side toward the flow passage, and the valve body of the " C " -shaped valve trim having the tip portion protruding toward the opened portion is moved forward and backward A pilot chamber is formed between the rear of the valve trim and the inner surface of the inner body, and a valve seat is disposed in the flow passage so as to be in close contact with or spaced from the tip when the tip of the valve trim is moved forward and backward, A kick-off spring is provided at the rear of the trim to elastically act in the closing direction of the oil passage, Wherein the first and second connection flow passages are connected to each other through a first connection flow channel connected to the inlet port, a second connection flow channel connected to the pilot chamber, and a third connection flow channel connected to the flow channel, The fluid pressure in the pilot chamber side is lower than the fluid pressure in the inlet chamber side when the fluid in the pilot chamber is discharged through the flow path, The valve trim is moved in the direction of the pilot chamber to open the flow path and when the first and second connection flow paths are connected through the manipulator and the fluid at the inlet port flows into the pilot chamber, The fluid pressure is equal to the fluid pressure on the pilot chamber side, and an unbalanced force due to the elasticity of the kick-off spring is generated, As is moved to close the flow path has its features.

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According to an embodiment of the present invention, the first connection passage is further provided with a speed control valve for controlling the forward / backward movement speed of the valve trim by controlling the degree of opening / closing or opening of the first connection passage.

The third connection passage is further provided with a check valve for preventing the fluid of the passage from flowing backward and controlling the discharge in one direction.

According to the present invention, a coaxial streamline flow path structure is formed between an inlet port and an outlet port of a body part, and first, second, and third connection flow paths are connected to an inlet port of the flow path and a pilot chamber and a flow path inside the flow path, The valve trim of the pilot chamber moves forward and backward to open and close the flow path, the fluid of the pilot chamber is discharged to the flow path, the valve trim is retracted by the generation of the differential pressure between the inlet side and the pilot chamber side, And the valve trim is advanced by the imbalance of the force due to the elastic force of the kick-off spring, so that the closing operation is performed. Therefore, compared with the conventional orthogonal flow path structure in which the diaphragm opens and closes, Large, high flow rate, wide range of pilot chamber pressure limits allow for large valve manufacturing Of course, it is easy to switch between normally closed type and open type depending on the installation direction of the solenoid type actuator connected to the first, second and third connection flow channels, and it is possible to easily cope with design change and format change. It has an excellent effect of flexibility.

In addition, a check valve is provided in the third connection passage connected to the flow passage so that the movement of the valve trim due to the reverse flow of the flow passage to the pilot chamber is prevented irrespective of the mounting posture of the valve, And a speed control valve is provided in a first connection passage connected to the inlet of the flow path to control the opening and closing speed of the valve according to the back and forth movement of the valve trim when the valve is opened and closed, Effect.

1 is an overall perspective view of the present invention;
2 is a front sectional view showing a state in which the valve of the present invention is opened.
3 is a front sectional view showing a state in which the valve is closed according to the present invention.
4 is an exploded sectional view of Fig.
5 is a cross-sectional view showing the check valve of the present invention.
6 to 8 are sectional views of the main part showing various drive embodiments of the present invention stem shaft.

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

As shown in FIGS. 1 to 5, the pilot type solenoid valve having the coaxial stream line flow path structure of the present invention includes an outer body 10 having an inlet 11 and an outlet 12 on both sides thereof, The body portion 100 having the double structure of the inner body 20 forming the coaxial stream line 13 by the spacing distance from the outer body is divided into the front and rear parts,
The inner body 20 opens at one side toward the flow path 13 and a valve trim 30 having a 'C' shape in which a tip portion 32 is protruded toward the opened portion inside the inner body 20, A pilot chamber 35 is formed between the rear of the valve trim 30 and the inner surface of the inner body 20,
The valve seat 15 which is in close contact with or spaced from the tip end portion 32 is positioned in the flow path 13 when the tip end portion 32 of the valve trim 30 is moved forward and backward.

A kick-off spring (80) is provided behind the valve trim (30) to elastically act in the closing direction of the flow path (13).

Particularly, the body 100 has a first connection passage 51 connected to the inlet 11, a second connection passage 52 connected to the pilot chamber 35, The third connection flow path 53 is formed to pass through the outside, and the first, second, and third connection flow paths 51, 52, and 53 are connected and controlled by a solenoid operated normal operation device.

As shown in FIG. 2, by connecting and controlling the first, second, and third connection flow paths 51, 52, and 53 by a normal operation device that solenoidally operates the fluid in the pilot chamber 35, And the valve trim 30 is retracted by the generation of the differential pressure between the inlet 11 side and the pilot chamber 35 side so as to open and operate the fluid in the inlet 11 as shown in FIG. (35), and the valve trim (30) is advanced by the imbalance of the force due to the elastic force of the kick-off spring to close the valve.

2, when the second and third connection passages 52 and 53 are connected by the manipulator, the fluid in the pilot chamber 35 is discharged to the flow passage 13, The valve trim 30 is retracted to generate a differential pressure (a force acting on the valve trim in the opening direction largely) on the pilot chamber 35 side and the pilot chamber 35 side to open the valve trim 30. As shown in FIG. 3, The fluid in the inlet port 11 is supplied to the pilot chamber 35 to form a dynamic pressure but the unbalance of the force due to the elastic action of the kick-off spring 80 When the valve trim 30 is closed, the valve trim front end portion 32 is brought into close contact with the valve seat 15 so that the valve trim 30 is closed again. (The force in the closing direction of the valve trim largely acts) on the pilot chamber 11 side and the pilot chamber 35 side Is configured to the closed state of the valve trim (30) keep operating.

The first connection passage 51 is further provided with a speed control valve 70 for controlling the forward / backward movement speed of the valve trim 30 by adjusting the opening / closing degree of the first connection passage.

At this time, the speed control valve (70) is a bolt screwed to the body part (100) and moves forward and backward by adjusting the screw so that the tip part adjusts the opening / closing degree of the central connection part of the first connection channel .

The third connection passage 53 is further provided with a check valve 60 for preventing the fluid of the flow passage 13 from flowing backward and controlling the unidirectional discharge.

6 to 8, the stem shaft 40 vertically installed at the center of the body 100 interlocks with the valve stem 30 by forward and backward movement, 6 shows a state in which the slot groove 41 at the lower end of the stem shaft 40 and the upper end of the valve stem 30 at the upper portion of the valve trim 30 are closed, 7 shows a coupling structure of the pin 31a at the lower end of the stem shaft 40 and the slot groove 31b at the upper portion of the valve trim 30 in FIG. ) And the lugs (31c) on the valve trim (30).

Reference numeral 5 denotes a connection fuse connecting the inner and outer bodies, and 16 denotes a fixture for fixing the valve seat 15, respectively.

Hereinafter, the operation and operation of the present invention will be described.

In the pilot type solenoid valve, the pilot chamber between the inlet and the outlet is formed into a coaxial structure and opened and closed.

2, when the valve is to be opened in a valve closed state in which the flow path 13 is blocked by the valve trim 30, the second and third connection flow paths 52 and 53 are connected do.

The fluid in the pilot chamber 35 is discharged to the flow path 13 of the body portion 100 through the second connection flow path 52 and the third connection flow path 53 and flows into the pilot chamber 35 The fluid pressure of the fluid flows down.

As a result of the fluid pressure drop inside the pilot chamber 35, the pressure difference between the inlet 11 side of the body portion 100 and the pilot chamber 35 side, that is, A larger fluid pressure acts on the inlet 11 side, so that the valve trim 30 is retracted to open the flow path 13.

Since the check valve 60 is provided in the third connection passage 53, the flow rate of the flow passage 13 is regulated to at least the valve trim 30 by flowing back to the pilot chamber 35, So that the valve surging, that is, the closing of the valve can be prevented.

When the valve is to be closed again in this state, the first and second connection flow passages 51 and 52 are connected by the manipulator as shown in FIG.

The fluid on the side of the inlet 11 of the body 100 is supplied into the pilot chamber 35 through the first connection passage 51 and the second connection passage 52, The internal fluid pressure rises.

When the fluid pressure in the pilot chamber 35 rises, the internal fluid pressure in the pile chamber 35 becomes equal to the fluid pressure in the inlet port 11 of the body 100, The valve trim 30 of the valve body 35 is elastically provided by the kick-off spring 80 to cause an unbalance in the force, so that the valve trim 30 is advanced to close the flow path 13.

That is, the tip end portion 32 of the valve trim 30 is brought into close contact with the valve seat 15 to close the flow path 13.

At this time, the leading end portion 32 of the valve trim 30 closely contacts the valve seat 15, and a differential pressure due to an area difference in which the fluid pressure acting on the front and the back of the valve seat acts acts on the valve seat 15, It is maintained in the closed state.

Therefore, according to the present invention, by connecting and controlling the first, second, and third connection flow paths 51, 52, and 53 by the manipulating device, the fluid in the pilot chamber is discharged to the flow path to generate the differential pressure between the inlet side and the pilot chamber side The valve trim is retracted to open, the fluid in the inlet is supplied to the pilot chamber, and the valve trim is advanced by the imbalance of the force due to the elastic force of the kick-off spring.

The present invention makes it possible to manufacture a large valve because the displacement of the valve trim is sufficient and the pressure loss is small and the flow rate is large and the pressure limit range of the pilot chamber is wide as compared with the conventional orthogonal flow path structure in which the diaphragm opens and closes. Of course, it is easy to switch between normally closed type and open type depending on the orientation of the actuator, so that it is easy to cope with design change and format change, and flexibility in management before production, distribution and installation.

In addition, in the present invention, the speed control valve 70 is screwed into the first connection passage 51, and the degree of opening / closing or opening of the first connection passage is controlled by the speed control valve, To adjust the opening / closing speed of the valve trim 30 due to the back and forth movement of the valve trim 30.

That is, the opening and closing speed of the valve due to the back-and-forth movement of the valve trim 30 is adjusted to minimize the water shock.

Further, in the present invention, the stem shaft 40 is interlocked with the valve trim 30 in the forward and backward directions to rotate forward and backward, thereby visually confirming the opening and closing state of the valve.

6 to 8, the interlocking operation of the valve trim 30 and the stem shaft 40 is performed by inserting the slot groove 41 at the lower end of the stem shaft 40 and the pin 31a at the upper portion of the valve trim 30, A coupling structure between the pin 42 at the lower end of the stem shaft 40 and the slot groove 31b at the upper portion of the valve trim 30 and the pinion 43 at the lower end of the stem shaft 40, (31c) coupling structure, and the like.

10: outer body 11: inlet
12: outlet 20: inner body
13: Euro 30: Valve trim
32: distal end 35: pilot chamber
40: stem shaft 100: body part
15: valve seat 51, 52, 53: first, second,
60: Check valve 70: Speed control valve
80: kick off spring

Claims (3)

In the pilot type solenoid valve,
An inner body 20 having an inlet 11 and an outlet 12 on both sides and an inner body 20 provided inside the outer body and forming a coaxial stream line 13 by a distance between the outer body and the outer body, The body portion 100 having the structure is divided into front and back parts,
The inner body 20 opens at one side toward the flow path 13 and a valve trim 30 having a 'C' shape in which a tip portion 32 is protruded toward the opened portion inside the inner body 20, A pilot chamber 35 is formed between the rear of the valve trim 30 and the inner surface of the inner body 20,
A valve seat 15 which is in close contact with or spaced from the tip end portion 32 is positioned in the flow path 13 when the tip end portion 32 of the valve trim 30 is moved forward and backward,
A kick-off spring (80) is provided at the rear of the valve trim (30) to elastically act in the closing direction of the flow path (13)
The main body 100 is provided with a first connection passage 51 connected to the inlet 11 and a second connection passage 52 connected to the pilot chamber 35, The connecting passage 53 is formed to penetrate to the outside,
The first, second and third connection flow passages 51, 52 and 53 are connected and controlled by a solenoid operated normal operation device,
When the fluid in the pilot chamber 35 is discharged to the flow path 13, the fluid pressure in the pilot chamber 35 is lower than the fluid pressure in the inflow port 11 side, The valve trim 30 is moved in the direction toward the pilot chamber 35 by the generation of the differential pressure in which the fluid pressure in the pilot chamber 35 is lowered to open the flow path 13,
When the first and second connection passages 51 and 52 are connected to the pilot chamber 35 through the manipulator and the fluid in the inlet 11 flows into the pilot chamber 35, The valve trim 30 is moved in the direction of the flow path 13 so that the flow path 13 is closed And the pilot-type solenoid valve has a coaxial stream-type channel structure. The method according to claim 1,
Wherein the first connection passage (51) is further provided with a speed control valve (70) for controlling the forward / backward movement speed of the valve trim (30) by adjusting the degree of opening / closing or opening of the first connection passage Pilot type solenoid valve with streamlined flow path structure. The method according to claim 1,
And a check valve (60) is further installed in the third connection passage (53) to prevent reverse flow of the fluid in the passage (13) and to control unidirectional discharge. The pilot type solenoid valve.

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