CN220523295U

CN220523295U - Spring-free direct-acting electromagnetic valve

Info

Publication number: CN220523295U
Application number: CN202320448450.1U
Authority: CN
Inventors: 李文; 董付冰; 刘德超; 边瑞朋
Original assignee: Vicot Solar Technology Co ltd
Current assignee: Vicot Solar Technology Co ltd
Priority date: 2023-03-06
Filing date: 2023-03-06
Publication date: 2024-02-23
Anticipated expiration: 2033-03-06

Abstract

The utility model provides a spring-free direct-acting electromagnetic valve, which comprises: a switching device having an off state and an on state; the reset device is arranged on one side of the switch device and comprises a permanent magnet, and the reset device is reset by using magnetic force; the electromagnetic valve body is arranged on the other side of the switch device; and the electromagnetic coil is arranged outside the switching device. According to the spring-free direct-acting electromagnetic valve, the permanent magnets are used in the reset device, the reset function is realized by using repulsive force between the two permanent magnets to replace a reset spring, and the risk of spring breakage is eliminated. The electromagnetic valve can adapt to more severe corrosive medium conditions. The residual magnetism of the moving and static iron cores of the solenoid valve coil at the instant of power failure is solved, and the influence on the switching-off function of the solenoid valve is avoided.

Description

Spring-free direct-acting electromagnetic valve

Technical Field

The utility model relates to the field of electromagnetic valves, in particular to a spring-free direct-acting electromagnetic valve.

Background

Solenoid valves are electromagnetic controlled industrial equipment, are automatic basic elements for controlling fluids, and belong to 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. Solenoid valves are many, and different solenoid valves function at different locations in the control system, most commonly one-way valves, safety valves, directional control valves, speed regulating valves, and the like. The electromagnetic valve is internally provided with a closed cavity, through holes are formed in different positions, each hole is connected with different oil pipes, a piston is arranged in the middle of the cavity, two electromagnets are arranged on two sides, the magnet coil on which side is electrified can attract the valve body to which side, different oil drain holes are opened or closed through movement of the control valve body, the oil inlet holes are normally open, hydraulic oil can enter the different oil drain pipes, then the piston of the oil cylinder is pushed through the pressure of the oil, the piston drives a piston rod, and the piston rod drives a mechanical device. Thus, the mechanical movement is controlled by controlling the current on-off of the electromagnet. The step-by-step direct-acting electromagnetic valve is a principle of combining direct action and pilot action, when there is no pressure difference between inlet and outlet, after the electric power is applied, electromagnetic force directly lifts the pilot small valve and main valve closing member upwards in turn, and the valve is opened. When the inlet and the outlet reach the starting pressure difference, after the electromagnetic force leads the small valve, the pressure of the lower cavity of the main valve rises, and the pressure of the upper cavity falls, so that the main valve is pushed upwards by utilizing the pressure difference; when the power is off, the pilot valve pushes the closing member to move downwards by utilizing spring force or medium pressure, so that the valve is closed.

In the existing electromagnetic valve structure, when the valve needs to be opened, an external coil is electrified to generate a magnetic field to drive the inside of the electromagnetic valve to be easily magnetized to the movable and static iron cores to generate a corresponding attraction magnetic force. The movable iron core moves to open the electromagnetic valve. When the electromagnetic valve needs to be closed, the coil is powered off, the movable iron core is pushed to reset by the reset spring, and the liquid through hole of the valve body is sealed, so that the sealing function is achieved. The existing solution is that a spring with matched elasticity is arranged at the top end of a sealing rod, and when an electromagnetic valve is opened, the magnetic force generated by a coil drives an internal movable iron core to compress the spring, so that the spring generates proper elasticity. When the coil is powered off, the inner iron core and the sealing rod are pushed, and the attraction force generated by residual magnetism of the coil is eliminated under the gravity resultant force of the inner iron core and the sealing rod, so that the function of rapid sealing is achieved. Because the spring is extremely easy to fatigue and break in the working condition of high temperature, high pressure and corrosive gas and liquid, the spring effect is invalid. Eventually leading to the whole solenoid valve seizing and failing.

Disclosure of Invention

In view of the above drawbacks of the prior art, the present utility model provides a spring-less direct-acting solenoid valve to improve the technical problem of the easy damage of the spring in the reset device.

To achieve the above and other related objects, the present utility model provides a spring-free direct-acting solenoid valve comprising: the device comprises a switching device, a resetting device, an electromagnetic valve body and an electromagnetic coil.

The switch device has an off state and an on state; the reset device is arranged at one side of the switch device and comprises a permanent magnet, and the reset device is reset by using magnetic force; the electromagnetic valve body is arranged on the other side of the switch device; the electromagnetic coil is arranged outside the switching device.

In an example of the present utility model, the reset device includes a first permanent magnet and a second permanent magnet, where the first permanent magnet and the second permanent magnet are disposed homopolar and adjacent to each other; the first permanent magnet is fixedly arranged at one end of the resetting device, which is far away from the switching device, and the second permanent magnet is slidably arranged at one end of the resetting device, which is close to the switching device; the second permanent magnet moves close to the first permanent magnet or away from the first permanent magnet under the action of the force.

In one example of the utility model, a switching device includes a housing, a moving core, a stationary core, and a sealing rod; the shell is fixedly connected with the reset device, and the shell is fixedly connected with the electromagnetic valve body.

In an example of the utility model, one side of the sealing rod is fixedly arranged on the second permanent magnet, the other side of the sealing rod is positioned at the electromagnetic valve body, when the switch device is in a closed state, the sealing rod seals the electromagnetic valve body, and fluid in the electromagnetic valve body cannot circulate; when the switch device is in an open state, the electromagnetic valve body is unsealed by the sealing rod, and fluid in the electromagnetic valve body can pass through the electromagnetic valve body.

In one example of the present utility model, the stationary core is fixedly disposed on a side of the housing adjacent to the reset device, and the movable core is slidably disposed on a side of the housing adjacent to the solenoid valve body.

In an example of the present utility model, the sealing rod penetrates the stationary core to be fixedly connected with the second permanent magnet, the sealing rod is not connected with the stationary core, the movable core is fixedly connected with the sealing rod, and the movable core drives the sealing rod to move.

In one example of the present utility model, an electromagnetic coil is wound outside the switching device, the electromagnetic coil magnetizes the movable core and the stationary core, and the electromagnetic coil de-magnetizes the movable core and the stationary core.

In one example of the utility model, the switch device is in an on state after the electromagnetic coil is energized to magnetize the switch device; after the electromagnetic coil is de-energized and de-magnetized, the switching device is in an off state.

In one example of the present utility model, the housing is a nonmagnetic body.

In one example of the present utility model, a heat sink is provided on the underside of the electromagnetic coil outside the switching device, and the heat sink dissipates heat from the whole.

According to the spring-free direct-acting electromagnetic valve, the permanent magnets are used in the reset device, the reset function is realized by using repulsive force between the two permanent magnets to replace a reset spring, and the risk of spring breakage is eliminated. The electromagnetic valve can adapt to more severe corrosive medium conditions. The residual magnetism of the moving and static iron cores of the solenoid valve coil at the instant of power failure is solved, and the influence on the switching-off function of the solenoid valve is avoided.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other 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 a direct-acting solenoid valve according to an embodiment of the utility model;

fig. 2 is a cross-sectional view of a direct-acting solenoid valve in accordance with an embodiment of the present utility model.

Description of element reference numerals

100. A switching device; 200. a reset device; 300. an electromagnetic valve body; 400. an electromagnetic coil; 500. a heat sink; 110. a housing; 120. a stationary core; 130. a movable iron core; 140. a sealing rod; 210. a first permanent magnet; 220. and a second permanent magnet.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the utility model is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the utility model. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.

Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs and to which this utility model belongs, and any method, apparatus, or material of the prior art similar or equivalent to the methods, apparatus, or materials described in the examples of this utility model may be used to practice the utility model.

It should be understood that the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like are used in this specification for descriptive purposes only and not for purposes of limitation, and that the utility model may be practiced without materially departing from the novel teachings and without departing from the scope of the utility model.

Referring to fig. 1 to 2, a spring-free direct-acting solenoid valve, comprising: switching device 100, resetting device 200, solenoid valve body 300, solenoid 400.

The switching device 100 has an off state and an on state; the reset device 200 is arranged at one side of the switch device 100, the reset device 200 comprises a permanent magnet, and the reset device 200 uses magnetic force to reset; the solenoid valve body 300 is provided at the other side of the switching device 100; the electromagnetic coil 400 is disposed outside the switching device 100.

In an embodiment of the present utility model, the reset device 200 includes a first permanent magnet 210 and a second permanent magnet 220, where the first permanent magnet 210 and the second permanent magnet 220 are disposed in homopolar proximity; the first permanent magnet 210 is fixedly arranged at one end of the reset device 200 away from the switch device 100, and the second permanent magnet 220 is slidably arranged at one end of the reset device 200 close to the switch device 100; the second permanent magnet 220 performs a movement under force either close to the first permanent magnet 210 or away from the first permanent magnet 210. In the reset device 200, the first permanent magnet 210 is fixedly arranged, the position of the first permanent magnet 210 is not changed, the second permanent magnet 220 is not fixedly arranged, and the first permanent magnet moves along the hollow cavity reserved by the reset device 200 under the action of force. The first permanent magnet 210 and the second permanent magnet 220 are disposed with the same polarity opposite to each other, and the two permanent magnets are repulsive to each other, and the second permanent magnet 220 is far away from the first permanent magnet 210 due to the repulsive force between the first permanent magnet 210 and the second permanent magnet 220. When the second permanent magnet 220 is pushed toward the first permanent magnet 210 by a larger force, the second permanent magnet 220 moves toward the first permanent magnet 210 because the pushing force at this time is greater than the repulsive force.

In one embodiment of the present utility model, the switching device 100 includes a housing 110, a movable core 130, a stationary core 120, and a sealing rod 140; the housing 110 is fixedly connected with the resetting device 200, and the housing 110 is fixedly connected with the solenoid valve body 300. One side of the sealing rod 140 is fixedly arranged on the second permanent magnet 220, the other side of the sealing rod 140 is positioned at the electromagnetic valve body 300, when the switch device 100 is in a closed state, the sealing rod 140 seals the electromagnetic valve body 300, and fluid in the electromagnetic valve body 300 cannot circulate; when the switching device 100 is in the open state, the sealing rod 140 unseals the solenoid valve body 300, and fluid in the solenoid valve body 300 can pass through. The stationary core 120 is fixedly disposed at a side of the housing 110 adjacent to the reset device 200, and the movable core 130 is slidably disposed at a side of the housing 110 adjacent to the solenoid valve body 300. The sealing rod 140 penetrates through the static iron core 120 to be fixedly connected with the second permanent magnet 220, the sealing rod 140 is not connected with the static iron core 120, the movable iron core 130 is fixedly connected with the sealing rod 140, and the movable iron core 130 drives the sealing rod 140 to move. The case 110 is made of a nonmagnetic material. Both ends of the non-magnetic housing 110 of the switching device 100 are connected to the reset device 200 and the solenoid valve body 300, respectively. Inside the housing 110, near one side of the resetting device 200, the static iron core 120 is fixedly arranged on the housing 110, and a through hole is formed in the middle of the static iron core 120. Inside the housing 110, on the side close to the solenoid valve body 300, the movable iron core 130 is slidably disposed on the housing 110, and the movable iron core 130 moves close to the stationary iron core 120 or away from the stationary iron core 120 when receiving a force. The sealing rod 140 is fixedly arranged with the movable iron, the sealing rod 140 and the movable iron core 130 synchronously move, and one side of the sealing rod 140 is fixedly connected with the second permanent magnet 220 through the hollow cavity of the static iron core 120, so that the second permanent magnet 220, the sealing rod 140 and the movable iron core 130 synchronously move. The other end of the sealing rod 140 is positioned at the solenoid valve body 300, the sealing rod 140 moves towards the solenoid valve body 300 to seal the solenoid valve body 300, the sealing rod 140 moves away from the solenoid valve body 300, and the solenoid valve body 300 is opened.

In an embodiment of the present utility model, the electromagnetic coil 400 is wound outside the switching device 100, the electromagnetic coil 400 magnetizes the moving core 130 and the stationary core 120, and the electromagnetic coil 400 de-magnetizes the moving core 130 and the stationary core 120. After the electromagnetic coil 400 is energized to magnetize the switching device 100, the switching device 100 is in an on state; after electromagnetic coil 400 de-energizes switching device 100, switching device 100 is in an off state. After the electromagnetic coil 400 is electrified, a magnetic field is generated to magnetize the static iron core 120 and the movable iron core 130, the movable iron core 130 receives the attractive force of the static iron core 120, at this time, the attractive force between the movable iron core 130 and the static iron core 120 is larger than the repulsive force between the first permanent magnet 210 and the second permanent magnet 220, the movable iron core 130 moves towards the static iron core 120, so that the sealing rod 140 and the second permanent magnet 220 are driven to move together in a direction away from the electromagnetic valve body 300, after the sealing rod 140 leaves the electromagnetic valve body 300, the electromagnetic valve body 300 is opened, and at this time, the switching device 100 is in an open state. After the electromagnetic coil 400 is de-energized, the magnetism of the stationary core 120 and the movable core 130 disappears, and the second permanent magnet 220 moves in a direction away from the first permanent magnet 210 due to the repulsive force between the first permanent magnet 210 and the second permanent magnet 220. Thereby driving the movable iron core 130 and the sealing rod 140 to move in a one-pass manner, the sealing rod 140 enters the electromagnetic valve body 300 to seal the electromagnetic valve body 300, and the switching device 100 is in a closed state at the moment.

In an embodiment of the present utility model, the heat dissipation device 500 is disposed on the outer side of the switch device 100 and the lower side of the electromagnetic coil 400, and the heat dissipation device 500 dissipates heat from the whole. During operation, heat generated in the solenoid valve is dissipated out of the electrovalve. The electromagnetic valve is prevented from being damaged or even dangerous due to heating caused by electromagnetic effect in the working process of the electromagnetic valve.

According to the spring-free direct-acting electromagnetic valve, the permanent magnets replace the traditional springs to reset, the permanent magnets are oppositely arranged in the same polarity, the repulsive force between the first permanent magnet 210 and the second permanent magnet 220 is utilized to reset, and the electromagnetic valve body 300 is sealed and closed. Therefore, the utility model effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance. The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. A springless direct acting solenoid valve comprising:

a switching device having an off state and an on state;

the reset device is arranged on one side of the switch device and comprises a permanent magnet, and the reset device is reset by using magnetic force; the resetting device comprises a first permanent magnet and a second permanent magnet, and the first permanent magnet and the second permanent magnet are homopolar and adjacently arranged; the first permanent magnet is fixedly arranged at one end of the resetting device, which is far away from the switching device, and the second permanent magnet is slidably arranged at one end of the resetting device, which is close to the switching device; the second permanent magnet moves close to the first permanent magnet or away from the first permanent magnet under the action of the acting force;

the electromagnetic valve body is arranged on the other side of the switch device;

and the electromagnetic coil is arranged outside the switching device.

2. The direct acting solenoid valve of claim 1 wherein the switching device comprises a housing, a moving core, a stationary core, and a sealing rod; the shell is fixedly connected with the reset device, and the shell is fixedly connected with the electromagnetic valve body.

3. The direct acting solenoid valve of claim 2 wherein one side of the sealing rod is fixedly disposed on the second permanent magnet, the other side of the sealing rod is located at the solenoid valve body, and the sealing rod seals the solenoid valve body when the switching device is in the closed state, and fluid in the solenoid valve body cannot circulate; when the switch device is in an open state, the sealing rod unseals the electromagnetic valve body, and fluid in the electromagnetic valve body can pass through.

4. A direct acting solenoid valve as described in claim 3 wherein said stationary core is fixedly disposed within said housing on a side thereof adjacent said reset means and said movable core is slidably disposed within said housing on a side thereof adjacent said solenoid valve body.

5. The direct acting solenoid valve of claim 4, wherein the sealing rod penetrates the stationary core to be fixedly connected with the second permanent magnet, the sealing rod is not connected with the stationary core, the movable core is fixedly connected with the sealing rod, and the movable core drives the sealing rod to move.

6. The direct acting solenoid valve of claim 2 wherein the solenoid coil is wound outside of the switching device, the solenoid coil magnetizing the moving core and the stationary core, the solenoid coil demagnetizing the moving core and the stationary core.

7. The direct-acting solenoid valve of claim 6, wherein the switching device is in the on state after the solenoid turns on the switching device; after the electromagnetic coil is deenergized to magnetize the switching device, the switching device is in the off state.

8. The direct-acting solenoid valve of claim 2, wherein the housing is a non-magnetic body.

9. The direct-acting solenoid valve of claim 1, wherein the outside of the switching device and the underside of the solenoid coil have a heat sink that dissipates heat from the whole.