KR100609788B1 - Electric valve - Google Patents

Abstract

The present invention relates to a poppet type direct acting solenoid valve, which is formed to communicate with a P port communicating with a first through hole (11) and a second through hole (12) communicating with a first through hole (11). A valve body (10) having a port and an R port formed to communicate with a third through hole (13) communicating with the second through hole (12); A solenoid valve 20 integrated with the valve body 10 and having a movable iron core 21 projecting from the third through hole 13 toward the second through hole 12; A pilot plug 30 installed in the first through hole 11 so as to be transportable, the orifice 31 communicating with the P port and opened toward the second through hole 12; A valve body 40 which is installed to be transportable within the second through hole 12 and selectively closes the orifice 31 or the third through hole 13; It is coupled to the movable iron core 21 in the third through hole 13, and transfers the valve body 40 in the direction of the second through hole 12, the valve body 40 in the direction of the second through hole 12 Peristaltic valve 50 for communicating the A port and the R port when transferred to; A first spring 60 which biases the peristaltic valve 50 in the direction of the second through hole 12; A second spring 70 installed between the valve body 40 and the pilot plug 30 and having a modulus of elasticity smaller than that of the first spring 60; And a third spring 80 which elastically biases the pilot plug 30 in the direction of the valve body 40 and has a modulus of elasticity greater than that of the first spring 60.

Description

Poppet type direct acting solenoid valve {Electric valve}

1 is a poppet type direct acting solenoid valve according to the present invention, a view showing a state in which the A port and the R port in communication,

2 is a view showing a state in which the P port and the A port are in communication by operating the solenoid valve in FIG.

3 is a view showing a state in which the flow path between the P port and the A port is widened by the pressure of the flowing fluid in FIG.

4 is a view showing a state in which the A port and the R port communicate with each other by the valve body blocking the orifice when the solenoid valve stops operating in FIG. 3;

FIG. 5 is a view showing a state in which the flow path between the A port and the R port is narrowed while the pilot plug is returned to the initial state by the third spring in FIG. 4.

<Description of Signs of Major Parts of Drawings>

10 ... valve body 11 ... first through hole

12 ... second through hole 13 ... third through hole

20 ... solenoid valve 21 ... movable core

30 ... pilot plug 31 ... orifice

32 ... O-ring 40 ... Valve body

50 ... peristaltic valve 60 ... first spring

70 ... 2nd spring 80 ... 3rd spring

The present invention relates to a poppet type direct acting solenoid valve having a pilot function, and more particularly, to a poppet type direct acting solenoid valve capable of increasing a flow rate through simple structure improvement.

The poppet type direct acting solenoid valve is applied to an automated device to operate a specific configuration, and controls the operation of the specific configuration by precisely controlling the flow rate of a fluid such as a liquid or a gas that operates the specific configuration. These solenoid valves are packaged in dozens or hundreds of them and applied to automated equipment. Furthermore, the solenoid valve is used in various fields such as not only a power source but also a flow rate of a solvent for causing a chemical reaction or a flow rate of a gas for cleaning the inside of a precise machine. In the case of controlling a large flow rate in a specific field, the overall size thereof is made large and used.

However, in the poppet type direct acting solenoid valve, when the flow rate of the fluid to be controlled is large, the overall size is inevitably increased, leading to an increase in manufacturing cost, further increasing power consumption and temperature. In addition, since the space in which the solenoid valve is mounted in the automation equipment is small, in some cases, when the size of the solenoid valve is increased, the mounting may not be possible at all.

The present invention has been made to solve the above problems, the structure is improved to control a large flow rate without increasing the overall size, and provides a poppet-type direct acting solenoid valve that can minimize the increase in manufacturing costs It aims to do it. Still another object of the present invention is to provide a poppet type direct acting solenoid valve capable of minimizing a generated temperature without increasing power consumption despite an increase in the flow rate.

In order to achieve the above object, the poppet type direct acting solenoid valve according to the present invention,

A P port communicating with the first through hole 11, an A port formed to communicate with the second through hole 12 communicating with the first through hole 11, and the second through hole 12; A valve body (10) having an R port formed to communicate with a third through hole (13) communicating; A solenoid valve 20 integrated with the valve body 10 and having a movable core 21 protruding from the third through hole 13 toward the second through hole 12; A pilot plug 30 installed to be transportable in the first through hole 11 and having an orifice 31 in communication with the P port and open toward the second through hole 12; A valve body 40 which is installed to be transportable in the second through hole 12 and selectively closes the orifice 31 or the third through hole 13; Coupled to the movable iron core 21 in the third through hole 13, the valve body 40 is transferred in the direction of the second through hole 12, the valve body 40 is the second Peristaltic valve (50) for communicating the A port and the R port when conveyed in the through hole (12) direction; A first spring 60 which biases the peristaltic valve 50 in the direction of the second through hole 12; A second spring (70) installed between the valve body (40) and the pilot plug (30) and having an elastic modulus smaller than that of the first spring (60); And a third spring 80 which elastically biases the pilot plug 30 in the direction of the valve body 40 and has a modulus of elasticity greater than that of the first spring 60.

Hereinafter, a poppet type direct acting solenoid valve according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view illustrating a state in which an A port and an R port communicate with each other in a poppet type direct acting solenoid valve according to the present invention, and FIG. 2 illustrates a P port and an A port by operating a solenoid valve in FIG. 1. It is a figure which shows the state connected, FIG. 3 is a figure which shows the state which the flow path between P port and A port widened by the pressure of the fluid which flows in FIG. 4 is a view showing a state in which the A port and the R port communicate with each other by blocking the orifice when the solenoid valve is stopped in FIG. 3, and FIG. 5 is a third spring in FIG. 4. Shows a state in which the flow path between the A port and the R port is narrowed while the pilot plug returns to the initial state.

As shown, the poppet type direct acting solenoid valve according to the present invention is to communicate with the P port communicated with the first through-hole 11, the second through-hole 12 communicated with the first through-hole (11). A valve body 10 having an A port formed therein and an R port formed to communicate with a third through hole 13 communicating with the second through hole 12, and a third through hole integrated with the valve body 10. 13, the solenoid valve 20 having a movable iron core 21 protruding in the direction of the second through hole (12).

In the first through hole 11 of the valve body 10, a pilot plug 30 is formed to be transportable so that an orifice 31 is formed in communication with the P port and opened toward the second through hole 12. do. At this time, the O-ring 32 is installed on the outer circumference of the pilot plug 30, so that the sealing can be made surely.

In the second through hole 12, a valve body 40 for selectively closing the orifice 31 or the third through hole 13 is provided to be transferable.

In the third through hole 13, a peristaltic valve 50 coupled to the movable iron core 21 is provided to be transferable. At this time, the peristaltic valve 50 can transfer the valve body 40 in the direction of the first through hole 11, in which case the communication state between the P port and the A port is in the communication state between the A port and the R port. Is switched.

On the other hand, the valve body 10 is provided between the first spring 60 and the valve body 40 and the pilot plug 30 to elastically bias the peristaltic valve 50 in the direction of the second through hole 12. And a second spring 70 having an elastic modulus smaller than that of the first spring 60, and a pilot plug 30 elastically biased in the direction of the valve body 40 and having a larger elastic modulus than the first spring 60. The third spring 80 is included. In other words, when comparing the elastic modulus, the third spring 80> the first spring 60> the second spring 70.

Next, the operation of the poppet type direct acting solenoid valve of the above structure will be described.

In the initial state, as shown in FIG. 1, the valve body 40 remains in close contact with the orifice 31, and in this state, the A port and the R port are in communication with each other.

When power is applied to the solenoid valve 20, as shown in FIG. 2, the movable iron core 21 is retracted, so that the interlock valve 50 coupled to the movable iron core 21 is retracted together. Then, the valve body 40 is elastically biased by the second spring 70 and is transferred in the direction of the third through hole 13 to close the third through hole 13. However, the valve body 40 forms a flow path while being separated from the orifice 31 of the pilot plug 30 so that the A port and the P port communicate with each other. Then, the fluid flowing through the P port along the direction of the arrow exits via the A port.

On the other hand, while the fluid flows from the P port to the A port, a pressure is generated in the second through hole 12, which is shown in Fig. 3, the pilot plug 30, the second through hole 12 It will be pushed away from you. As a result, the flow path between the P port and the A port becomes wider, so that a larger amount of the fluid flowing into the P port flows into the A port. That is, the flow path between the P port and the A port becomes wider as the pilot plug 30 moves in the direction of the arrow due to the pressure of the fluid flowing through the A port. In this state, more fluid flows from the P port to the A port (indicated by a 2-line arrow).

Next, in order to close the flow path formed between the P port and the A port, the driving of the solenoid valve 20 is released. Then, as shown in Figure 4, the peristaltic valve 50 is elastically biased by the first spring 60 is moved in the direction of the second through-hole 12 while moving the valve body 40 in the first through-hole 11 Is pushed in the) direction. At this time, since the elastic modulus of the first spring 60 is larger than the second spring 70 provided between the valve body 40 and the pilot plug 30, the valve body 40 eventually comes into close contact with the orifice 31. do. Then, the flow path between the P port and the A port is closed, and the flow path between the A port and the R port is opened so that more fluid flows than the initial state (indicated by the two-line arrow).

In this state, when the pressure of the A port decreases, as shown in FIG. 5, the third spring 80 returns the pilot plug 30 to its initial position. At this time, since the elastic modulus of the third spring 80 is greater than the elastic modulus of the first spring 60, the third spring 80 opens the valve body 40 in close contact with the orifice 31 in a third through-hole ( 13) and eventually to the initial state shown in FIG.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

As described above, according to the poppet type direct acting solenoid valve according to the present invention, the flow path between the P port and the A port is formed by operating the solenoid valve in the initial state in which the flow path between the A port and the R port is formed, and then P The pressure generated between the port and the A port widens the flow path between the P port and the A port, thereby allowing more fluid to flow.

Claims (1)

A P port communicating with the first through hole 11, an A port formed to communicate with the second through hole 12 communicating with the first through hole 11, and the second through hole 12; A valve body (10) having an R port formed to communicate with a third through hole (13) communicating; A solenoid valve 20 integrated with the valve body 10 and having a movable core 21 protruding from the third through hole 13 toward the second through hole 12; A pilot plug 30 installed to be transportable in the first through hole 11 and having an orifice 31 in communication with the P port and open toward the second through hole 12; A valve body 40 which is installed to be transportable in the second through hole 12 and selectively closes the orifice 31 or the third through hole 13; Coupled to the movable iron core 21 in the third through hole 13, the valve body 40 is transferred in the direction of the second through hole 12, the valve body 40 is the second Peristaltic valve (50) for communicating the A port and the R port when conveyed in the through hole (12) direction; A first spring 60 which biases the peristaltic valve 50 in the direction of the second through hole 12; A second spring (70) installed between the valve body (40) and the pilot plug (30) and having an elastic modulus smaller than that of the first spring (60); And a third spring (80) elastically biasing the pilot plug (30) in the direction of the valve body (40) and having a modulus of elasticity greater than that of the first spring (60). Type solenoid valve.

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