Electromagnetic proportional valve with continuously adjustable outlet pressure

Abstract

The utility model relates to the technical field of electromagnetic proportional valves. The utility model discloses an electromagnetic proportional valve with continuously adjustable outlet pressure, which comprises a shell, a plurality of iron cores, a return spring, a switch, an electromagnet, a reset spring, a power switch and a power supply, and is characterized in that the lower part of the switch comprises an abutting part; the end, away from the shell, of the abutting part is arranged on one side of the iron core, the electromagnet is arranged in a hollow cavity of the shell, and the power switches are arranged below the iron core. The outlet pressure change can be set by setting the length of the iron core in the extension direction of the electromagnet, so that the electromagnet is suitable for various flow conditions. According to the electromagnetic proportional valve, continuous adjustment of outlet pressure is achieved through cooperation of a mechanical structure, and compared with an existing mode that an opening is controlled to be opened and closed through accurate current control, dependence on a complex circuit is reduced.

Description

Technical Field

[0001] This application relates to the technical field of electromagnetic proportional valves, and particularly refers to an electromagnetic proportional valve with continuously adjustable outlet pressure. Background Art

[0002] Ordinary valves cannot perform continuous step control in proportion. They are pure single-action switch valves, with a fixed valve opening direction, opening amount, or spring setting force, and cannot change according to actual situations. Proportional valves perform continuous step control in proportion and automatically compensate and control the target based on the information collected according to actual situations. Their valve opening direction, opening amount, or spring setting force are all follow-up, realizing a series of continuously controllable follow-up change actions. An electromagnetic proportional valve is a control valve that uses the magnetic force of an electromagnet to control the position of the valve core, thereby realizing continuous proportional adjustment of parameters such as the flow rate and pressure of the fluid. It can accurately control the moving distance of the valve core according to the magnitude and change of the input electrical signal, and then change the opening of the valve port to achieve precise proportional control of the fluid. Electromagnetic proportional valves are widely used in the field of industrial automation control, such as hydraulic systems and pneumatic systems, and can achieve high-precision and high-response-speed control.

[0003] However, for existing electromagnetic proportional valves, since precise control of the current is required to control the opening and closing, the required circuit structure is relatively complex. When a fault occurs in the circuit for controlling the current, the repair is rather cumbersome. Moreover, because the circuit for controlling the current requires a relatively large amount of space, the existing electromagnetic proportional valves occupy more space. Summary of the Utility Model

[0004] To solve the deficiencies of the prior art, this application discloses an electromagnetic proportional valve with continuously adjustable outlet pressure that can achieve continuously adjustable outlet pressure only through its structure and has a relatively simple structure.

[0005] The utility model discloses an electromagnetic proportional valve with continuously adjustable outlet pressure. The electromagnetic proportional valve includes a housing, an iron core, a return spring, a switch, an electromagnet, a reset spring, a power switch and a power supply. The housing includes a hollow cavity, and the housing includes a through passage. There are several iron cores, and the several iron cores are arranged in sequence in the hollow cavity of the housing. There are several return springs, and the return springs are arranged in the hollow cavity of the housing. One end of the return spring is connected to the housing, and the other end of the return spring is connected to the iron core. The switch is arranged outside the housing, and a contact part is included below the switch. The contact part penetrates and extends into the housing, and one end of the contact part far from the housing is arranged on one side of the iron core. The electromagnet is arranged in the hollow cavity of the housing. One end of the electromagnet penetrates and extends into the passage of the housing and abuts against the housing, and the other end of the electromagnet is close to the lower part of the iron core. The reset spring is arranged in the hollow cavity of the housing. One end of the reset spring is connected to the housing, and the other end of the reset spring is connected to the electromagnet. There are several power switches, and the power switches are arranged below the iron core. The power supply is arranged on one side of the housing, and the power supply is electrically connected to the internal power switch and the electromagnet of the housing. Among them, the contact part includes a closed state of the electromagnetic proportional valve when the contact part does not abut against the iron core on one side of the iron core and an open state of the electromagnetic proportional valve when the contact part moves to the upper part of the iron core and abuts against the iron core.

[0006] Further, a buffer part is included on the electromagnet, and the through passage included in the housing includes a recessed passage groove. The buffer part is abutted and arranged in the passage groove.

[0007] Further, taking the plane where the electromagnet is located as the electromagnet plane, the projection of the iron core on the electromagnet plane is the iron core projection, and the closest distance between the electromagnet and the iron core projection is greater than the length of the buffer part in the passage groove.

[0008] Further, taking the extension direction of the length of the electromagnet as the electromagnet length direction, there is a spacing between adjacent iron cores, and the spacing between adjacent iron cores is 30%-50% of the length of the iron core in the electromagnet length direction.

[0009] Further, the side of the contact part close to the iron core is inclined downward to form a contact inclined surface, and an iron core inclined surface corresponding to the contact inclined surface is arranged on the side of the iron core close to the contact part.

[0010] Further, the housing is provided with sound insulation materials near the outside.

[0011] Further, several heat dissipation holes are penetrated and arranged on one side of the housing.

[0012] The beneficial effects of the utility model:

[0013] 1. This application sets several iron cores for the switch to have several gears. When the switch moves from the abutted iron core to the next iron core, the original iron core returns to its original position under the action of the return spring. The electromagnet can continue to magnetically attract the next iron core, and the electromagnet continues to move away from the housing, thereby realizing continuously adjustable outlet pressure of the electromagnetic proportional valve. This application can set the magnitude of the outlet pressure change by setting the length of the iron core in the extension direction of the electromagnet, so as to adapt to various flow conditions.

[0014] 2. This electromagnetic proportional valve realizes continuously adjustable outlet pressure through the cooperation of mechanical structures. Compared with the existing method of precisely controlling the current to control the opening switch, it reduces the dependence on complex circuits, reduces the cumbersome maintenance problems caused by circuit failures, and the electromagnetic proportional valve does not require a complex control current circuit, saving the space occupied by the circuit, making the structure of the entire electromagnetic proportional valve more compact and reducing the space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of an electromagnetic proportional valve in an embodiment of this application.

[0016] In the figure: electromagnetic proportional valve 100, housing 11, iron core 12, return spring 13, switch 14, abutting portion 141, electromagnet 15, buffer portion 151, return spring 16, power switch 17, power supply 18. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to enable those skilled in the art to better understand the solution of this utility model, the technical solutions in the specific embodiments of this utility model will be clearly and completely described below.

[0018] The utility model discloses an electromagnetic proportional valve 100 with continuously adjustable outlet pressure. The electromagnetic proportional valve 100 includes a housing 11, an iron core 12, a return spring 13, a switch 14, an electromagnet 15, a reset spring 16, a power switch 17 and a power supply 18. The housing 11 includes a hollow cavity therein and a through passage. The housing 11 constitutes the basic framework of the electromagnetic proportional valve 100. The iron core 12, the return spring 13, the switch 14, the electromagnet 15, the reset spring 16, the power switch 17 and the power supply 18 are arranged inside and on the housing 11. The through passage in the housing 11 serves as the flow passage of the electromagnetic proportional valve 100 for passing liquids and gases. There are several iron cores 12, and the several iron cores 12 are arranged in sequence in the hollow cavity of the housing 11. There are several return springs 13, and the return springs 13 are arranged in the hollow cavity of the housing 11. One end of the return spring 13 is connected to the housing 11, and the other end of the return spring 13 is connected to the iron core 12. The switch 14 is arranged outside the housing 11, and a contact portion 141 is included below the switch 14. The contact portion 141 penetrates into the housing 11, and one end of the contact portion 141 away from the housing 11 is arranged on one side of the iron core 12. The electromagnet 15 is arranged in the hollow cavity of the housing 11. One end of the electromagnet 15 penetrates into the passage of the housing 11 and abuts against the housing 11, and the other end of the electromagnet 15 is close to the lower part of the iron core 12. The reset spring 16 is arranged in the hollow cavity of the housing 11. One end of the reset spring 16 is connected to the housing 11, and the other end of the reset spring 16 is connected to the electromagnet 15. There are several power switches 17, and the power switches 17 are arranged below the iron core 12. The power supply 18 is arranged on one side of the housing 11, and the power supply 18 is electrically connected to the internal power switch 17 and the electromagnet 15 of the housing 11.When the user uses the electromagnetic proportional valve 100, by moving the switch 14, the abutting portion 141 below the switch 14 abuts against the iron core 12, pushing the iron core 12 to move downward. When the iron core 12 moves to the position of the power switch 17 below the iron core 12, it starts to abut against and turn on the power switch 17. At this time, the power supply 18 supplies power to the electromagnet 15, and the electromagnet 15 generates magnetism. Under the action of the magnetic force, the electromagnet 15 moves towards the iron core 12 until it abuts against the iron core 12, and the electromagnet 15 penetrates into the passage in the housing 11 and abuts against one end of the housing 11 and also disengages from the housing 11. Thus, in the passage passing through the housing 11, a passage appears between the electromagnet 15 and the housing 11 as a flow passage. In this application, several iron cores 12 can be provided to set several gears for the switch 14. When the switch 14 moves from the abutting iron core 12 to the next iron core 12, the original iron core 12 returns to its original position under the action of the return spring 16. The electromagnet 15 can continue to magnetically attract the next iron core 12, and the electromagnet 15 continues to move away from the housing 11. Thus, the outlet pressure of the electromagnetic proportional valve 100 can be continuously adjusted. In this application, the magnitude of the outlet pressure change can be set by setting the length of the iron core 12 in the extending direction of the electromagnet 15, so as to adapt to various flow conditions. The electromagnetic proportional valve 100 realizes the continuous adjustment of the outlet pressure through the cooperation of the mechanical structure. Compared with the existing method of precisely controlling the current to control the opening and closing of the switch 14, it reduces the dependence on complex circuits, reduces the cumbersome maintenance problems caused by circuit failures, and the electromagnetic proportional valve 100 does not require a complex control current circuit, saves the space occupied by the circuit, makes the structure of the entire electromagnetic proportional valve 100 more compact, and reduces the space occupation.

[0019] As an implementation manner, the electromagnet 15 includes a buffer portion 151, and the passage passing through the housing 11 includes a recessed passage groove. The buffer portion 151 is abutted and arranged in the passage groove. The buffer portion 151 on the electromagnet 15 abuts in the passage groove, which can provide a more effective buffering effect when the electromagnet 15 and the iron core 12 move, reduce the impact and wear between components, and extend the service life of the electromagnetic proportional valve 100. The abutting arrangement of the buffer portion 151 in the passage groove helps to stabilize the position of the electromagnet 15, prevent unnecessary displacement or distortion during its operation, and ensure that the electromagnet 15 can accurately and stably play its role.

[0020] As an implementation manner, taking the plane where the electromagnet 15 is located as the electromagnet 15 plane, the projection of the iron core 12 on the electromagnet 15 plane is the iron core 12 projection, and the closest distance between the electromagnet 15 and the iron core 12 projection is greater than the length of the buffer portion 151 in the passage groove. To prevent the distance that the electromagnet 15 moves when adsorbing and abutting against the iron core 12 from being less than the length of the buffer portion 151 in the passage groove, and to prevent the situation that the passage penetrating through the housing 11 does not penetrate when the electromagnet 15 adsorbs and abuts against the iron core 12, and gas and liquid cannot flow through the passage penetrating through the housing 11, the closest distance between the electromagnet 15 and the iron core 12 projection is set to be greater than the length of the buffer portion 151 in the passage groove.

[0021] As an implementation manner, taking the extension direction of the length of the electromagnet 15 as the electromagnet 15 length direction, there is a spacing between adjacent iron cores 12, and the spacing between adjacent iron cores 12 is 30%-50% of the length of the iron core 12 in the electromagnet 15 length direction. To prevent the spacing between the iron cores 12 from being too close, on the one hand, when the iron core 12 moves, there will be an influence between adjacent iron cores 12, and on the other hand, when the switch 14 switches to the next iron core 12, the original iron core 12 is still adsorbed by the electromagnet 15 before it rebounds, making the electromagnetic proportional valve 100 unable to switch gears. When the spacing between adjacent iron cores 12 is 30%-50% of the length of the iron core 12 in the electromagnet 15 length direction, when the switch 14 passes between two adjacent iron cores 12 during the gear switching of the electromagnetic proportional valve 100, the original iron core 12 will rebound and return to its position, without affecting the function of the electromagnetic proportional valve 100 to adjust the outlet pressure. Further, the spacing between adjacent iron cores 12 is 35%-45% of the length of the iron core 12 in the electromagnet 15 length direction. Further still, the spacing between adjacent iron cores 12 is 40% of the length of the iron core 12 in the electromagnet 15 length direction.

[0022] As an implementation manner, the side of the abutting portion 141 close to the iron core 12 is inclined downward to form an abutting inclined surface, and an iron core 12 inclined surface corresponding to the abutting inclined surface is provided on the side of the iron core 12 close to the abutting portion 141. To prevent the switch 14 from being too hindered when moving due to the abutting portion 141 abutting against the iron core 12, in this application, the provided abutting inclined surface and the corresponding iron core 12 inclined surface are used to reduce the force required to move the switch 14, and due to the relationship of the inclined surface, the situation of jamming due to abutting is reduced, increasing the applicability of the electromagnetic proportional valve 100.

[0023] As an implementation manner, a sound insulation material is provided near the outer side of the housing 11. When the electromagnetic proportional valve 100 is in use, since electromagnetic action is used and the suction force generated during the use of electromagnetic action is relatively large, a relatively large noise will be generated. In order to provide a better user experience for the electromagnetic proportional valve 100, a sound insulation material is provided near the outer side of the housing 11 of the electromagnetic proportional valve 100 of the present application to insulate the components inside the electromagnetic proportional valve 100.

[0024] As an implementation manner, a plurality of heat dissipation holes are provided through one side of the housing 11. When the electromagnetic proportional valve 100 is in use, the components inside the housing 11 will generate heat. In order to prevent the heat from having an adverse effect on the components inside the housing 11, a plurality of through heat dissipation holes are provided on one side of the housing 11 in the present application, and the components inside the housing 11 are dissipated through the heat dissipation holes.

[0025] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. An electromagnetic proportional valve with continuously adjustable outlet pressure, characterized in that, Comprising: A housing, which includes a hollow cavity inside and a through passage; An iron core, including several iron cores arranged in sequence in the hollow cavity of the housing; Return springs, including several return springs, which are arranged in the hollow cavity of the housing. One end of the return spring is connected to the housing, and the other end is connected to the iron core; A switch, which is arranged outside the housing. There is a contact part below the switch. The contact part penetrates into the housing, and one end of the contact part away from the housing is arranged on one side of the iron core; An electromagnet, which is arranged in the hollow cavity of the housing. One end of the electromagnet penetrates into the passage of the housing and abuts against the housing, and the other end of the electromagnet is close to the lower part of the iron core; A reset spring, which is arranged in the hollow cavity of the housing. One end of the reset spring is connected to the housing, and the other end is connected to the electromagnet; Power switches, including several power switches, which are arranged below the iron core; A power supply, which is arranged on one side of the housing and is electrically connected to the internal power switch and the electromagnet of the housing; wherein, the contact part includes a closed state of the electromagnetic proportional valve when it does not abut against the iron core on one side of the iron core and an open state of the electromagnetic proportional valve when the contact part moves to the upper part of the iron core and abuts against the iron core.

2. The electromagnetic proportional valve with continuously adjustable outlet pressure according to claim 1, characterized in that: There is a buffer part on the reset spring, and the through passage in the housing includes a recessed passage groove. The buffer part is abutted and arranged in the passage groove.

3. The electromagnetic proportional valve with continuously adjustable outlet pressure according to claim 2, characterized in that: Taking the plane where the electromagnet is located as the electromagnet plane, the projection of the iron core on the electromagnet plane is the iron core projection. The closest distance between the electromagnet and the iron core projection is greater than the length of the buffer part in the passage groove.

4. The electromagnetic proportional valve with continuously adjustable outlet pressure according to claim 1, characterized in that: Taking the extension direction of the length of the electromagnet as the electromagnet length direction, there is a spacing between adjacent iron cores, and the spacing between adjacent iron cores is 30%-50% of the length of the iron core in the electromagnet length direction.

5. The electromagnetic proportional valve with continuously adjustable outlet pressure according to claim 1, characterized in that: One side of the contact part close to the iron core is inclined downward to form a contact inclined surface, and an iron core inclined surface corresponding to the contact inclined surface is arranged on one side of the iron core close to the contact part.

6. The electromagnetic proportional valve with continuously adjustable outlet pressure according to claim 1, characterized in that: The housing is provided with sound insulation materials near the outside.

7. The electromagnetic proportional valve with continuously adjustable outlet pressure according to claim 1, characterized in that: Several heat dissipation holes are penetrated and arranged on one side of the housing.

Images