CN109268566B

CN109268566B - Electromagnetic valve

Info

Publication number: CN109268566B
Application number: CN201811244234.5A
Authority: CN
Inventors: 黄小伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-10-24
Filing date: 2018-10-24
Publication date: 2024-02-09
Anticipated expiration: 2038-10-24
Also published as: CN109268566A

Abstract

The invention provides an electromagnetic valve, and relates to the field of valves. The solenoid valve comprises a valve body, a coil seat, a main valve core, a first spring, a spring seat, a pilot valve core, a push rod and an iron core, wherein the valve body is connected with the coil seat, a fluid inlet and a fluid outlet are formed in the valve body, the main valve core is movably arranged in the valve body, two ends of the first spring are respectively propped against the main valve core and the spring seat, an orifice is formed in the side wall of the spring seat, the pilot valve core stretches into the spring seat, the iron core is sleeved on the push rod, a coil is arranged in the coil seat, the iron core is movably arranged in the coil seat, and the push rod is used for moving relative to the valve body under the driving of the iron core so as to push the pilot valve core, so that the pilot valve core opens the orifice or adjusts the opening of the orifice. The opening of the throttle hole on the side wall of the spring seat can be directly changed through the movement of the pilot valve core, so that the purpose of changing flow is achieved, the first spring generates continuously variable damping force on the pilot valve core, and the performance of the solenoid valve is improved.

Description

Electromagnetic valve

Technical Field

The invention relates to the field of valves, in particular to an electromagnetic valve.

Background

Solenoid valves (Electromagnetic valve) are solenoid-operated industrial equipment, are automated basic elements for controlling fluids, and are actuators, not limited to hydraulic and pneumatic. For use in industrial control systems to adjust the direction, flow, velocity and other parameters of the medium. The solenoid valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured. At present, the damping force of a spring applied to a valve core of a solenoid valve in the market is not continuously variable, and the performance is poor.

Disclosure of Invention

The invention aims to provide a solenoid valve which can generate a continuously variable damping force.

Embodiments of the present invention are implemented as follows:

the utility model provides a solenoid valve, includes valve body, coil holder, main valve core, first spring, spring holder, guide's case, ejector pin and iron core, the valve body with the coil holder is connected, be provided with fluid inlet and the fluid outlet that can communicate each other on the valve body, the main valve core movably set up in the valve body is used for closing or opening the fluid inlet, the both ends of first spring support respectively hold in the main valve core with the spring holder, offer the orifice rather than the inside intercommunication on the lateral wall of spring holder, the guide's case stretches into in the spring holder, the iron core cover is located the ejector pin, be provided with the coil in the coil holder, the iron core movably set up in the inside of coil holder, the ejector pin is used for being used for under the drive of iron core relatively the valve body moves, so that the guide's case opens the orifice or adjusts the aperture of orifice.

Further, the guide valve core comprises a shielding part, a communicating part and a supporting part which are sequentially connected, wherein the shielding part is used for completely shielding, partially shielding or completely opening the throttle hole, the diameter of the communicating part is smaller than that of the shielding part, a gap is reserved between the communicating part and the inner wall of the spring seat, and the supporting part is used for being pushed by the ejector rod so as to drive the shielding part to move through the communicating part.

Further, the electromagnetic valve further comprises a second spring, two ends of the second spring are respectively propped between the spring seat and the propping part, the ejector rod is used for moving along a direction away from the pilot valve core when the coil electrifying current is reduced, and the propping part drives the shielding part under the action of the elastic force of the second spring, so that the opening degree of the orifice is reduced when the shielding part is opened.

Further, when the coil current is increased, the ejector rod is used for pushing the abutting part further so as to increase the opening degree of the shielding part for opening the orifice.

Further, the valve body comprises a shell, a valve sleeve and a valve seat, the coil seat extends into the shell from one end of the shell and is connected with the shell, the valve sleeve is mounted at the other end of the shell, the valve seat is mounted on the valve sleeve, the fluid inlet is arranged on the valve seat, the fluid outlet is arranged on the valve sleeve, and the main valve core, the first spring, the spring seat and the pilot valve core are all arranged in the valve sleeve.

Further, the electromagnetic valve further comprises a buffer piece and a third spring, a buffer channel is arranged in the valve sleeve and communicated with the inner cavity of the spring seat, the buffer piece is arranged at the outlet of one end of the buffer channel, one end of the third spring is propped against the inner wall of the shell, and the other end of the third spring is propped against the buffer piece.

Further, the electromagnetic valve further comprises a first guide assembly, the first guide assembly comprises a first guide sleeve, a stop block and a guide sleeve, the guide sleeve is sleeved outside one end of the ejector rod, which is close to the pilot valve core, the stop block is sleeved outside the guide sleeve, the first guide sleeve is sleeved outside the stop block, and the first guide sleeve is installed in the shell and the coil seat.

Further, the electromagnetic valve further comprises a second guide assembly, the second guide assembly comprises a second guide sleeve and a shaft sleeve, the shaft sleeve is sleeved outside one end of the ejector rod away from the pilot valve core, the second guide sleeve is sleeved outside the shaft sleeve, and the second guide sleeve is installed in the coil seat.

Further, the electromagnetic valve further comprises a magnetism isolating sleeve, and the magnetism isolating sleeve is arranged between the iron core and the coil.

Further, a communication hole is formed in the main valve core, and the fluid inlet is communicated with the inside of the valve body through the communication hole.

The electromagnetic valve provided by the embodiment of the invention has the beneficial effects that: according to the electromagnetic valve provided by the embodiment of the invention, as the throttling hole is arranged on the side wall of the spring seat, the opening degree of the throttling hole on the side wall of the spring seat can be directly changed through the movement of the pilot valve core, so that the flow is changed, the purpose of changing the flow is achieved, the first spring generates a continuously variable damping force on the pilot valve core, and the performance of the electromagnetic valve is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a solenoid valve according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a partial structure of a solenoid valve according to an embodiment of the present invention;

fig. 3 is a schematic diagram of another partial structure of the electromagnetic valve according to the embodiment of the present invention.

Icon: 1-an electromagnetic valve; 10-a valve body; 11-fluid inlet; 12-fluid outlet; 13-a housing; 14-valve sleeve; 15-valve seat; 16-a gasket; 17-a first sealing ring; 18-clamping springs; 20-coil base; 21-coil; 30-a main valve core; 31-communicating holes; 40-a first spring; 50-spring seat; 51-orifice; 52-a membrane; 60-a pilot spool; 61-shielding part; 62-communicating portion; 63-a holding portion; 70-ejector rod; 71-iron core; 80-a second spring; 90-cushioning member; 91-a third spring; 110-a first guide assembly; 111-a first guide sleeve; 112-a stop; 113-guide sleeve; 114-a second seal ring; 120-a second guide assembly; 121-a second guide sleeve; 122-sleeve; 130-magnetism isolating sleeve.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Examples

FIG. 1 is a schematic diagram of the overall structure of a solenoid valve according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a partial structure of a solenoid valve according to an embodiment of the present invention; FIG. 3 is a schematic view of another partial structure of a solenoid valve according to an embodiment of the present disclosure; referring to fig. 1 to 3, the present embodiment provides a solenoid valve 1, and the solenoid valve 1 includes a valve body 10, a coil seat 20, a main spool 30, a first spring 40, a spring seat 50, a pilot spool 60, a plunger rod 70, and an iron core 71.

Wherein, the valve body 10 is connected with the coil base 20, and the valve body 10 is provided with a fluid inlet 11 and a fluid outlet 12 which can be mutually communicated. A main valve spool 30 is movably disposed within the valve body 10 for closing or opening the fluid inlet 11. The first spring 40 has opposite ends respectively abutting against the main valve element 30 and the spring seat 50. The side wall of the spring seat 50 is provided with an orifice 51 communicating with the inside thereof. The pilot spool 60 extends into the spring seat 50. The iron core 71 is sleeved on the ejector rod 70, the coil 21 is arranged in the coil seat 20, and the iron core 71 is movably arranged in the coil seat 20. The ram 70 is used to move relative to the valve body 10 under the driving of the iron core 71 to push the pilot spool 60, so that the pilot spool 60 opens the orifice 51 or adjusts the opening degree of the orifice 51.

Further, the valve body 10 includes a housing 13, a valve housing 14, and a valve seat 15. The coil seat 20 extends into the housing 13 from one end of the housing 13 and is connected with the housing 13, the valve sleeve 14 is mounted at the other end of the housing 13, the valve seat 15 is mounted on the valve sleeve 14, the fluid inlet 11 is arranged on the valve seat 15, the fluid outlet 12 is arranged on the valve sleeve 14, and the main valve core 30, the first spring 40, the spring seat 50 and the pilot valve core 60 are all arranged in the valve sleeve 14.

In this embodiment, the valve sleeve 14 is sleeved outside the valve seat 15 and is mounted in one end of the housing 13. The interior of the valve housing 14 communicates with the interior of the coil housing 20. A gasket 16 is provided between the valve housing 14 and the valve seat 15, and a sealing action is provided between the valve housing 14 and the valve seat 15. In addition, the outer side of the housing 13 is provided with a first sealing ring 17 for sealing when the housing 13 is mated with an external structure. Optionally, the first sealing ring 17 is an O-ring. A clip spring 18 is provided between the housing 13 and the coil base 20.

The spring seat 50 has a cavity therein, and the orifice 51 provided on the side wall of the spring seat 50 communicates with the cavity, into which the pilot spool 60 extends. The spring seat 50 is provided with a diaphragm 52, one end of the diaphragm 52 is connected to the spring seat 50, and the other end is disposed between the main valve element 30 and the valve housing 14. By providing the diaphragm 52, fluid is prevented from entering between the spring seat 50 and the valve housing 14 as the spring seat 50 moves relative to the main spool 30.

In the present embodiment, the main valve element 30 is provided with a communication hole 31, and the fluid inlet 11 communicates with the inside of the valve body 10 through the communication hole 31. It should be understood that the fluid inlet 11 communicates with the interior of the valve housing 14 through the communication hole 31.

Further, the solenoid valve 1 further includes a second spring 80. Both ends of the second spring 80 are respectively abutted against the spring seat 50 and the pilot spool 60. The second spring 80 acts as a buffer between the spring seat 50 and the pilot spool 60.

Further, the solenoid valve 1 further includes a buffer member 90 and a third spring 91, a buffer channel is disposed in the valve housing 14, the buffer channel is communicated with the internal cavity of the spring seat 50, the buffer member 90 is disposed at an outlet of one end of the buffer channel, one end of the third spring 91 abuts against the inner wall of the housing 13, and the other end abuts against the buffer member 90. In this embodiment, the buffer member 90 is a steel ball. When the pressure of the fluid flowing into the valve body 10 is large, the fluid pushes the buffer member 90 to compress the third spring 91, and the fluid enters the buffer passage, thereby performing a pressure relief function.

Further, the pilot valve core 60 includes a shielding portion 61, a communicating portion 62 and a holding portion 63, which are sequentially connected, the shielding portion 61 is used for completely shielding, partially shielding or completely opening the orifice 51, the diameter of the communicating portion 62 is smaller than that of the shielding portion 61, a gap is formed between the communicating portion 62 and the inner wall of the spring seat 50, and the holding portion 63 is used for being pushed by the ejector 70 so as to drive the shielding portion 61 to move through the communicating portion 62.

In the present embodiment, both ends of the second spring 80 respectively abut against the spring seat 50 and the abutting portion 63. The jack 70 is configured to move in a direction away from the pilot spool 60 when the current supplied to the coil 21 decreases, and the communication portion 62 drives the shielding portion 61 under the elastic force of the second spring 80, so that the opening degree of the shielding portion 61 to open the orifice 51 decreases. The jack 70 is further configured to push the abutting portion 63 further when the current flowing through the coil 21 increases, so that the opening degree of the orifice 51 by the blocking portion 61 increases.

It should be understood that the solenoid valve 1 in the present embodiment is larger in the flow rate of the fluid passing through the solenoid valve 1 when the coil 21 energization current increases; when the coil 21 energization current decreases, the smaller the flow rate of the fluid passing through the solenoid valve 1, the convenience is brought to control the flow rate of the solenoid valve 1.

Further, the solenoid valve 1 further comprises a first guiding assembly 110 for guiding the plunger 70. The first guide assembly 110 includes a first guide sleeve 111, a stop 112 and a guide sleeve 113, the guide sleeve 113 is sleeved outside one end of the ejector 70 close to the pilot valve core 60, the stop 112 is sleeved outside the guide sleeve 113, the first guide sleeve 111 is sleeved outside the stop 112, and the first guide sleeve 111 is installed in the housing 13 and the coil seat 20.

In the present embodiment, a second seal ring 114 is provided between the first guide sleeve 111 and the housing 13, and serves to seal between the first guide sleeve 111 and the housing 13. Optionally, the second sealing ring 114 is an O-ring.

The solenoid valve 1 further comprises a second guiding assembly 120 for guiding the plunger 70. The second guide assembly 120 includes a second guide sleeve 121 and a sleeve 122, the sleeve 122 is sleeved outside one end of the push rod 70 away from the pilot valve core 60, the second guide sleeve 121 is sleeved outside the sleeve 122, and the second guide sleeve 121 is installed in the coil seat 20.

The solenoid valve 1 further includes a magnetism isolating sleeve 130, and the magnetism isolating sleeve 130 is disposed between the iron core 71 and the coil 21.

In this embodiment, the iron core 71 is sleeved outside the ejector rod 70 and is located between the guide sleeve 113 and the shaft sleeve 122. The magnetism insulator 130 is provided at a position corresponding to the iron core 71. In this embodiment, one end of the magnetism isolating sleeve 130 is sleeved outside the first guide sleeve 111, and the other end is sleeved outside the second guide sleeve 121.

In summary, the solenoid valve provided in this embodiment has the valve body 10 connected to the coil base 20, and the valve body 10 is provided with the fluid inlet 11 and the fluid outlet 12 that can be mutually communicated. A main valve spool 30 is movably disposed within the valve body 10 for closing or opening the fluid inlet 11. The first spring 40 has opposite ends respectively abutting against the main valve element 30 and the spring seat 50. The side wall of the spring seat 50 is provided with an orifice 51 communicating with the inside thereof. The pilot spool 60 extends into the spring seat 50. The iron core 71 is sleeved on the ejector rod 70, the coil 21 is arranged in the coil seat 20, and the iron core 71 is movably arranged in the coil seat 20. The ram 70 is used to move relative to the valve body 10 under the driving of the iron core 71 to push the pilot spool 60, so that the pilot spool 60 opens the orifice 51 or adjusts the opening degree of the orifice 51.

According to the solenoid valve 1 provided by the embodiment, through changing the current flowing into the coil 21, the ejector rod 70 pushes the pilot valve core 60 under the drive of the iron core 71, and as the throttle hole 51 is arranged on the side wall of the spring seat 50, the opening degree of the throttle hole 51 on the side wall of the spring seat 50 can be directly changed through the movement of the pilot valve core 60, so that the flow rate is changed, the purpose of changing the flow rate is achieved, the first spring 40 generates a continuously variable damping force on the pilot valve core 60, and the performance of the solenoid valve 1 is improved.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The electromagnetic valve is characterized by comprising a valve body, a coil seat, a main valve core, a first spring, a spring seat, a pilot valve core, a push rod and an iron core, wherein the valve body is connected with the coil seat, a fluid inlet and a fluid outlet which can be mutually communicated are arranged on the valve body, the main valve core is movably arranged in the valve body and used for closing or opening the fluid inlet, two ends of the first spring are respectively propped against the main valve core and the spring seat, an orifice communicated with the inside of the first spring is formed in the side wall of the spring seat, the pilot valve core stretches into the spring seat, the iron core is sleeved on the push rod, a coil is arranged in the coil seat, the iron core is movably arranged in the coil seat, and the push rod is used for moving relative to the valve body under the driving of the iron core so as to push the pilot valve core to open the orifice or adjust the opening of the orifice;

the pilot valve core comprises a shielding part, a communicating part and a supporting part which are sequentially connected, wherein the shielding part is used for completely shielding, partially shielding or completely opening the throttling hole, the diameter of the communicating part is smaller than that of the shielding part, a gap is reserved between the communicating part and the inner wall of the spring seat, and the supporting part is used for being pushed by the ejector rod so as to drive the shielding part to move through the communicating part;

the electromagnetic valve further comprises a second spring, two ends of the second spring are respectively propped between the spring seat and the propping part, the ejector rod is used for moving along the direction away from the pilot valve core when the electrified current of the coil is reduced, and the propping part drives the shielding part under the action of the elastic force of the second spring, so that the opening degree of the shielding part for opening the throttling hole is reduced;

the ejector rod is used for further pushing the abutting part when the coil electrifying current is increased, so that the opening degree of the orifice opened by the shielding part is increased.

2. The solenoid valve of claim 1 wherein said valve body includes a housing, a valve housing and a valve seat, said coil seat extending from one end of said housing into said housing and being connected thereto, said valve housing being mounted to the other end of said housing, said valve seat being mounted to said valve housing, said fluid inlet being disposed on said valve seat, said fluid outlet being disposed on said valve housing, said main spool, said first spring, said spring seat and said pilot spool all being disposed within said valve housing.

3. The electromagnetic valve according to claim 2, further comprising a buffer member and a third spring, wherein a buffer channel is provided in the valve housing, the buffer channel is communicated with the internal cavity of the spring seat, the buffer member is disposed at an outlet of one end of the buffer channel, one end of the third spring is abutted against the inner wall of the housing, and the other end of the third spring is abutted against the buffer member.

4. The solenoid valve of claim 2 further comprising a first guide assembly including a first guide sleeve, a stop and a guide sleeve, the guide sleeve being disposed over the end of the ram adjacent the pilot spool, the stop being disposed over the guide sleeve, the first guide sleeve being disposed over the stop, the first guide sleeve being mounted within the housing and the coil housing.

5. The solenoid valve of claim 1 further comprising a second guide assembly including a second guide sleeve and a sleeve, the sleeve being disposed over an end of the ram remote from the pilot spool, the second guide sleeve being disposed over the sleeve, the second guide sleeve being mounted within the coil housing.

6. The solenoid valve of claim 1 further comprising a magnetically isolated sleeve disposed between said core and said coil.

7. The electromagnetic valve according to claim 1, wherein a communication hole is provided on the main spool, through which the fluid inlet communicates with the inside of the valve body.