阅读说明：本技术 电磁阀 (Electromagnetic valve ) 是由 潘家宝 尹斌 于 2018-06-27 设计创作，主要内容包括：本申请提供一种电磁阀,包括定磁体、可相对所述定磁体移动的动磁体,所述电磁阀还包括第一线圈与第二线圈,所述电磁阀处于第一状态时,所述第一线圈与所述第二线圈通电后的磁力方向相同,所述电磁阀处于第二状态时,所述第二线圈通电后的磁力方向与所述第一状态时的磁力方向相反。所述电磁阀处于第一状态时,所述第一线圈与所述第二线圈通电后的吸附力驱动所述动磁体朝向所述定磁体移动,提高了对动磁体的吸附力,使本申请电磁阀可相对容易的打开,所述电磁阀处于第二状态时,所述第二线圈通电后的磁力部分或者全部抵消所述动磁体与/或所述定磁体的剩磁,使所述电磁阀可相对快速地关闭。(The application provides an electromagnetic valve, including the fixed magnet, can be relative the moving magnet that the fixed magnet removed, the electromagnetic valve still includes first coil and second coil, when the electromagnetic valve is in the first state, first coil with magnetic force direction after the second coil circular telegram is the same, when the electromagnetic valve is in the second state, magnetic force direction after the second coil circular telegram with magnetic force direction during the first state is opposite. When the electromagnetic valve is in the first state, the adsorption force generated after the first coil and the second coil are electrified drives the movable magnet to move towards the fixed magnet, so that the adsorption force on the movable magnet is improved, the electromagnetic valve can be opened relatively easily, and when the electromagnetic valve is in the second state, the residual magnetism of the movable magnet and/or the fixed magnet is partially or completely offset by the magnetic force generated after the second coil is electrified, so that the electromagnetic valve can be closed relatively quickly.)

1. The electromagnetic valve is characterized by further comprising a first coil and a second coil, wherein when the electromagnetic valve is in a first state, the magnetic force direction of the first coil and the magnetic force direction of the second coil after the first coil is electrified are the same, and when the electromagnetic valve is in a second state, the magnetic force direction of the second coil after the second coil is electrified is opposite to the magnetic force direction of the first coil.

2. The solenoid valve of claim 1 wherein in the second state the magnetic force direction of the first coil after energization is the same as the magnetic force direction in the first state.

3. The solenoid valve of claim 1 wherein in said second state said first coil is de-energized.

4. The electromagnetic valve according to claim 1, wherein the first coil and the second coil are wound in the same direction, and when the electromagnetic valve is in the first state, the first coil and the second coil pass the same current in the same direction.

5. The solenoid valve of claim 4, wherein the solenoid valve includes a capacitor connected in series with the second coil, and the second coil is connected in series with the capacitor and then connected in parallel with the first coil and connected to a power source.

6. The solenoid valve of claim 5 wherein in said first state said moving magnet moves closer to said fixed magnet and in said second state said moving magnet moves farther from said fixed magnet.

7. The solenoid valve of claim 6 wherein when the solenoid valve is in a third state, the second coil is disconnected from the power source.

8. The solenoid valve of claim 6 wherein when the solenoid valve is in the second state, the capacitor discharges and the first coil passes current in a direction opposite to the first state.

9. The solenoid valve of claim 8 wherein said moving magnet moves away from said stationary magnet only by its own weight when said solenoid valve is in the second state.

10. The solenoid valve according to claim 1, wherein the moving time of the moving magnet is 10ms to 20ms when the solenoid valve is in the first state.

11. The solenoid valve of claim 1, wherein the solenoid valve comprises a bobbin, the bobbin comprising a hollow inner side wall and an extension wall extending from opposite ends of the inner side wall, the inner side wall enclosing a receptacle, the moving magnet moving within the receptacle, the inner side wall and the extension wall enclosing a recess, the first coil being received within the recess.

12. The solenoid valve of claim 11 wherein said fixed magnet includes a main body portion within said receptacle, said main body portion including a recess, said second coil being received within said recess.

Technical Field

The present application relates to solenoid valves.

Background

The electromagnetic valve is an industrial device controlled by electromagnetism, is an automatic basic element for controlling fluid, belongs to an actuator, is used for adjusting the direction, flow rate, speed and other parameters of a medium in an industrial control system, and can be matched with different circuits to realize expected control. Because the related electromagnetic valve is provided with only one coil, when the electromagnetic valve needs to be closed, the magnetic conductive material of the electromagnetic valve has residual magnetism, so that suction force is generated on the movable iron core, and the closing time of the electromagnetic valve is prolonged.

Disclosure of Invention

The present application provides a solenoid valve that can be closed relatively quickly.

The application provides an electromagnetic valve, including the fixed magnet, can be relative the moving magnet that the fixed magnet removed, the electromagnetic valve still includes first coil and second coil, when the electromagnetic valve is in the first state, first coil with magnetic force direction after the second coil circular telegram is the same, when the electromagnetic valve is in the second state, magnetic force direction after the second coil circular telegram with magnetic force direction during the first state is opposite.

The utility model provides a technical scheme's solenoid valve includes first coil and second coil, when the solenoid valve is in the first state, first coil with the adsorption affinity drive after the second coil circular telegram move the moving magnet orientation the fixed magnet removes, has improved the adsorption affinity to moving magnet, makes this application solenoid valve opening relatively easily, when the solenoid valve is in the second state, magnetic force part or whole after the second coil circular telegram offset moving magnet and/or the remanence of fixed magnet, make the solenoid valve can close fast relatively.

Further, in the second state, the first coil is powered off.

According to the technical scheme, the first coil of the electromagnetic valve is powered off, the first coil does not generate magnetic force, and the reverse magnetic field generated by the second coil only offsets the residual magnetism of the movable magnet and/or the fixed magnet, so that the movable magnet can be closed relatively quickly, and the reliability of a product is improved.

Furthermore, the solenoid valve includes a capacitor connected in series with the second coil, and the second coil is connected in series with the capacitor and then connected in parallel with the first coil and is connected with a power supply.

According to the technical scheme, the second coil of the electromagnetic valve is connected in series with the capacitor and then connected in parallel with the first coil, after the electromagnetic valve is powered off, the capacitor is equivalent to a power supply to supply power, so that the current direction of the second coil is opposite, the direction of a generated magnetic field is opposite, the residual magnetism of the movable magnet and/or the fixed magnet is partially or completely offset by the magnetic force generated after the second coil is powered on, the movable magnet can be closed relatively quickly, and the reliability of a product is improved.

The utility model provides a technical scheme's solenoid valve includes first coil and second coil, when the solenoid valve is in the first state, first coil with the adsorption affinity drive after the second coil circular telegram move the moving magnet orientation the fixed magnet removes, has improved the adsorption affinity to moving magnet, makes this application solenoid valve opening relatively easily, when the solenoid valve is in the second state, magnetic force part or whole after the second coil circular telegram offset moving magnet and/or the remanence of fixed magnet, make the solenoid valve closes fast relatively.

Drawings

Fig. 1 is an exploded view of a solenoid valve according to an embodiment of the present application.

Fig. 2 is a schematic cross-sectional view of the solenoid valve shown in fig. 1.

Fig. 3 is an energization circuit diagram of the solenoid valve shown in fig. 1.

FIG. 4 is an electrical circuit diagram of another embodiment of the solenoid valve shown in FIG. 1.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the use of "first," "second," and similar terms in the description and claims do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Similarly, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one; similarly, "plurality" or "multiple layers" etc. means two or more than two. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items.

The following describes exemplary embodiments of the present application in detail with reference to the drawings. The features of the following examples and embodiments can be supplemented or combined with each other without conflict.

The electromagnetic valve comprises a first coil and a second coil, when the electromagnetic valve is opened, the adsorption force generated after the first coil and the second coil are electrified drives the movable magnet to move towards the fixed magnet, so that the adsorption force on the movable magnet is improved, and the electromagnetic valve can be opened easily; when the electromagnetic valve needs to be closed, the magnetic force generated by the second coil partially or completely offsets the residual magnetism of the movable magnet and/or the fixed magnet, so that the closing time of the movable magnet is shortened, and the reliability of a product is improved.

Referring to fig. 1 to 3, the electromagnetic valve of the present application includes a housing 1, a frame 2 located in the housing 1, a fixed magnet 3 connected to the housing 1, a moving magnet 4 moving relative to the frame 2, a first coil 5 wound on the moving frame 2, a second coil 6 wound on the fixed magnet 3, a plastic-sealed layer 7 coated on the periphery of the first coil 5, a bottom plate 8 connected to the housing 1, and a capacitor 9 connected in series with the second coil 6.

The housing 1 comprises a bottom wall 10 and a side wall 11 extending from the bottom wall 10. The bottom wall 10 and the side wall 11 enclose an accommodating space 101. The bottom wall 10 includes a through hole 102 communicating with the housing space 101. The bottom plate 8 is connected to the side walls 11. The bottom plate 8 and the bottom wall 10 are located at opposite ends of the side wall 11. The side wall 11 comprises a channel 110. The solenoid valve of the present application further comprises a circuit board (not shown), in the illustrated embodiment, the first coil 5 and the second coil 6 are connected to the circuit board (not shown) through the passage 110 of the housing 1 and then connected to the power supply 90, and the capacitor 9 is disposed on the circuit board.

The framework 2 is located in the accommodating space 101. The frame 2 includes a hollow inner sidewall 20 and extension walls 21 extending from opposite ends of the inner sidewall 20. The inner side wall 20 encloses a receiving portion 201. The inner side wall 20 and the extension wall 21 enclose a concave groove 210. The first coil 5 is accommodated in the recess groove 210. The plastic sealing layer 7 covers the first coil 5.

The fixed magnet 3 includes a main body 30 and an extension 31 extending from the main body 30. The cross-sectional area of the main body portion 30 is larger than that of the extension portion 31. The main body 30 is at least partially received in the receiving portion 201 of the frame 2, and the extension 31 is exposed to the housing 1 through the through hole 102. The main body portion 30 includes a recess 301, and the second coil 6 is housed in the recess 301. The second coil 6 is wound on the fixed magnet 3, and the volume of the solenoid valve is reduced compared with the related art. The second coil 6 is positioned in the receiving portion 201 and flush with the extension wall 21. The first coil 5 and the second coil 6 are wound in the same direction. In the illustrated embodiment, the winding directions of the first coil 5 and the second coil 6 are completely the same, and in other embodiments, the winding directions of the first coil 5 and the second coil 6 are not completely the same, as long as the magnetic fields generated by the first coil 5 and the second coil 6 have components in the moving direction of the moving magnet 4.

The base plate 8 includes a through hole 80 that aligns with the receiving portion 201 of the frame 2. The moving magnet 4 includes a base 40 passing through the through hole 80 and located in the accommodating portion 201. The base 40 moves within the housing 201.

Referring to fig. 3, in the illustrated embodiment, the second coil 6 is connected in series with the capacitor 9 and then connected in parallel with the first coil 5. When the solenoid valve is in the first state, i.e. the solenoid valve is open, the moving magnet 4 moves towards the fixed magnet 3. In the process, because the winding directions of the first coil 5 and the second coil 6 are the same, the capacitor 9 is connected in series on the second coil 6, the capacitor 9 is used for supplying alternating current and direct current, when the power supply 90 supplies power, the voltage increases from 0VDC to the rated voltage and needs a certain time, the time current of the voltage increase can pass through the capacitor 9, and the capacitor 9 at the moment is equivalent to the action of one lead, so that the first coil 5 and the second coil 6 are simultaneously electrified at the moment when the power supply 90 supplies power; because the winding directions of the first coil 5 and the second coil 6 are the same, and the directions of the currents introduced into the first coil 5 and the second coil 6 are also the same, the directions of the magnetic fields generated by the first coil 5 and the second coil 6 are also the same, acting forces on the moving magnet 4 are superposed, and the moving magnet 4 moves towards the direction close to the fixed magnet 3 under the action of the common attraction of the first coil 5 and the second coil 6. The moving time of the moving magnet 4 is 10ms to 20 ms. When the solenoid valve is in the third state, that is, after the moving magnet 4 moves a certain distance relative to the fixed magnet 3, the voltage of the power supply 90 is also at a stable value, and at this time, because the capacitor 9 has the function of alternating current resistance, the second coil 6 no longer has current to pass through, and the gap between the moving magnet 4 and the fixed magnet 3 is very small, so that the attraction force generated by the first coil 5 can completely ensure that the moving magnet 4 is kept in the third state. Because the first coil 5 and the second coil 6 are simultaneously opened, the suction force can be effectively improved, and simultaneously, the power of the first coil 5 can be effectively reduced, and the heat production quantity can be reduced; moreover, the existing spring is omitted and the second coil 6 is added, so that the magnetic force required by the first coil 5 is greatly reduced, the copper consumption can be effectively reduced, and the cost is reduced.

When the solenoid valve is in the second state, that is, when the solenoid valve needs to be closed, the power supply 90 is turned off, and the capacitor 9 is fully charged, so that the capacitor 9 is discharged, and at this time, the capacitor 9, the second coil 6 and the first coil 5 form a closed loop. Whereas for the second coil 6 the current direction changes from bottom to top (arrow direction in fig. 3), the direction of the first coil 5 is still bottom to top. Since the first coil 5 and the second coil 6 are wound in the same direction and the current direction is opposite, the generated magnetic fields are opposite in direction, and therefore, the magnetic force generated by the second coil 6 and the magnetic force generated by the first coil 5 partially or completely cancel each other. In the illustrated embodiment, the magnetic force generated by the first coil 5 is directed upward, and the magnetic force generated by the second coil 6 is directed downward, the upward direction is a direction in which the moving magnet 4 moves toward the fixed magnet 3, and the downward direction is a direction opposite to the upward direction. In the illustrated embodiment, no spring is arranged between the moving magnet 4 and the fixed magnet 3, and the moving magnet 4 can be closed relatively quickly only under the action of self gravity; meanwhile, when the electromagnetic valve is opened, because no spring is arranged, the resistance of the spring does not need to be overcome, so that the electromagnetic valve can be opened relatively easily. In other embodiments, the solenoid valve includes a spring between the moving magnet 4 and the fixed magnet 3, and when the solenoid valve needs to be closed, the moving magnet 4 is closed relatively quickly under the combined action of its own weight and the elastic force of the spring, so that the closing time of the moving magnet 4 is shortened.

In the embodiment shown in fig. 3, the second coil 6 is connected in series with the capacitor 9 and then connected in parallel with the first coil 5. In other embodiments, the first coil 5 and the second coil 6 may be connected in different circuits, and powered by different power sources. In this case, the winding directions of the first coil 5 and the second coil 6 may be the same or opposite. The supply of opposite magnetic fields can be realized by controlling the positive and negative directions of the power supply. When the electromagnetic valve is opened, the magnetic fields of the first coil 5 and the second coil 6 are the same, and both provide magnetic force for the movement of the moving magnet 4. When the electromagnetic valve needs to be closed, the second coil 6 can generate a reverse magnetic field to offset part or all of the magnetic field of the first coil 5 and the residual magnetism of the moving magnet 4 and/or the fixed magnet 3. When the electromagnetic valve is opened, the first coil 5 is powered off and does not generate a magnetic field, and the reverse magnetic field generated by the second coil 6 only counteracts the residual magnetism of the moving magnet 4 and/or the fixed magnet 3, so that the moving magnet 4 can be closed relatively quickly, and the reliability of the product is improved.

In the embodiment shown in fig. 3, the second coil 6 is connected in series with the capacitor 9 and then connected in parallel with the first coil 5. Referring to fig. 4, in other embodiments, the first coil 5 may be connected in parallel with a switch 91. When the electromagnetic valve is in a first state, the switch 91 is switched off, the power supply 90 supplies power to the first coil 5 and the second coil 6, when the electromagnetic valve is in a second state, the switch 91 is switched on, the capacitor 9 supplies power to the second coil 6, the first coil 5 is not electrified and does not generate a magnetic field, and the reverse magnetic field generated by the second coil 6 only counteracts the residual magnetism of the movable magnet 4 and/or the fixed magnet 3, so that the movable magnet 4 can be switched off relatively quickly, and the reliability of the product is improved.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.