Guide sliding type sealing control method of electromagnetic valve

Abstract

The invention provides a guide sliding type sealing control method of an electromagnetic valve, which is characterized in that the sealing action of the valve and the driving action of a movable iron core are decoupled: a vertical guide surface is arranged at the port of a valve seat, and the valve is transversely pressed against the guide surface through an elastic element; when the movable iron core vertically moves, the side face of the movable iron core drives the valve to transversely slide along the guide face. When the valve slides to completely cover the port, the sealing is realized by the pressure of the elastic element; when the valve is moved away, the channel is opened; the electromagnetic coil only needs to overcome the small pressure of the return spring and drive the valve to vertically move, the load and energy consumption are greatly reduced, heating is reduced, the reliability under the high-pressure continuous working conditions of an engine and the like is improved, and the service life of the valve is prolonged. The valve is opened and closed in a sliding mode to avoid hard collision with the valve seat, the guide face provides buffering, the elastic element provides flexible sealing force, abrasion of the sealing face is obviously reduced, and durability is enhanced. The overall operation of the system is more stable and safer, and the application requirements of high voltage, high frequency and long service life are met.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve switching control technology, and specifically to a guided sliding sealing control method for solenoid valves. Background Technology

[0002] When a solenoid valve is in operation, the solenoid coil is energized, magnetizing the stationary iron core, which attracts or repels the moving iron core, thereby opening or closing the valve. When the solenoid coil is de-energized, the stationary iron core is demagnetized, and the moving iron core is reset by a return spring. The valve is typically fixedly connected to one end of the moving iron core and coaxially mounted therewith. The moving iron core moves axially and, under the pressure of the return spring, abuts against the inlet or outlet of the liquid, thus closing the inlet or outlet. In environments with high hydraulic pressure, the return spring needs to generate significant pressure to overcome this pressure and prevent the liquid from breaching the inlet or outlet, ensuring the valve's sealing effect. In this scenario, when the valve needs to be opened, the solenoid coil also requires a large current to open it. The current application of solenoid valves in engine environments requires continuous operation at high pressures and with long lifespans. Due to prolonged operation, the solenoid coil heats up, leading to decreased insulation, accelerated aging, and even short circuits or burnout. This can also impact surrounding equipment, causing cascading failures and affecting the stability and safety of the entire control system. Existing solenoid valves, after repeated opening and closing over extended periods, suffer damage due to repeated impacts between the valve and seat, resulting in sealing failure. Existing solenoid valves are insufficient to meet these requirements. Summary of the Invention

[0003] This invention provides a guided sliding sealing control method for a solenoid valve, aiming to improve the solenoid valve control method, effectively avoid the problem of solenoid coil overheating and collision between the valve and valve seat, and fundamentally solve the problems existing in the prior art.

[0004] A guided sliding sealing control method for a solenoid valve, applied to a solenoid valve, wherein a vertically movable iron core is disposed within the valve seat of the solenoid valve, and the vertical movement of the movable iron core is controlled by an electromagnetic assembly; the method includes the following steps:

[0005] One end of the liquid passage inside the valve seat is located on one side of the moving iron core, and a vertical guide surface is provided at this port; the valve is movably mounted on one side of the moving iron core in the transverse direction, and the valve is pressed against the guide surface by an elastic element, and the sealing surface of the valve is in contact with and slides with the guide surface; the guide surface is used to guide the valve to the port.

[0006] The moving iron core is moved, causing the valve to move between the guide surface and the port; when the valve completely covers the port, the valve seals the port under the pressure of the elastic element; when the valve is removed from the port, the liquid passage is restored to the open state.

[0007] Furthermore, both the guide surface and the sealing surface are set as planes.

[0008] Further, the middle section of the liquid channel is set horizontally, and a notch is set in the middle section. Guide surfaces and ports of the liquid channel are formed on both sides of the notch. Valves and elastic elements are set on opposite sides of the moving iron core. When the moving iron core drives the valve to move to the port, the valves on opposite sides of the moving iron core simultaneously block and seal the corresponding ports.

[0009] Furthermore, the valves on opposite sides of the moving iron core are arranged in the same through groove, which is opened on the moving iron core. The elastic element is clamped between the valves on opposite sides of the moving iron core, and the valves are matched and slidably engaged with the side wall of the through groove.

[0010] Furthermore, the moving iron core is controlled by an electromagnetic component to move up and down reciprocatingly. Specifically:

[0011] The electromagnetic component uses a return spring to cause the moving iron core to press downward against the first limit position;

[0012] The electromagnetic component uses an electromagnetic coil and a fixed iron core to make the moving iron core press upward against the second limit position.

[0013] Furthermore: when the moving iron core is in the first limit position, the length of the return spring at this time is recorded as the first compression length; when the moving iron core is in the second limit position, the length of the return spring at this time is recorded as the second compression length, and the second compression length is less than the first compression length.

[0014] Furthermore, the elastic element is a helical telescopic spring or a disc spring.

[0015] A solenoid valve with a vertically actuated valve core, comprising the aforementioned guide sliding sealing control method for the solenoid valve.

[0016] The beneficial effects of this invention are as follows: 1. Since the valve is not directly fixed to the end of the moving iron core, its sealing relies on the pre-pressure of the elastic element, while the moving iron core only needs to drive the valve to move vertically on the guide surface, without having to directly overcome the liquid pressure for hard sealing; therefore, the pressure required for the return spring is greatly reduced, and the attraction required for the electromagnetic coil to open the valve is also reduced accordingly, thereby reducing the operating current; this significantly reduces the heat generated by the coil, effectively avoiding the risk of insulation performance degradation, accelerated aging, and short circuit burnout caused by continuous high temperature, and improving the reliability and service life of the electromagnetic valve under long-term high-pressure conditions such as engines;

[0017] 2. The valve opens and closes by sliding on the guide surface. Its movement is guided and buffered by the guide surface, avoiding the hard collision of the moving iron core directly driving the valve to impact the valve seat axially, as is the case in the prior art. The elastic element provides continuous and flexible sealing pressure, reducing the wear and deformation of the sealing surface during repeated movements. As a result, the damage rate of the valve and valve seat is greatly reduced, the sealing performance remains stable over a long period of time, and it is better able to adapt to high-frequency and high-pressure continuous working environments.

[0018] 3. The temperature rise of the electromagnetic coil is controlled, the failure rate is reduced, and the risk of thermal interference and cascading failures to surrounding equipment is reduced; at the same time, the valve seal is reliable and the service life is extended, ensuring the accuracy and stability of the fluid control process; the overall structure is more adaptable to the application requirements of high pressure and long-term operation, providing a higher level of valve control solution for critical systems such as engines. Attached Figure Description

[0019] Figure 1 This is a flowchart of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the solenoid valve in this invention;

[0021] Figure 3 for Figure 2 Enlarged view of the structure of region A in the middle. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings. Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The directional terms such as left, center, right, top, and bottom in the embodiments of the present invention are only relative concepts or referenced to the normal use state of the product, and should not be considered restrictive.

[0023] A guided sliding sealing control method for solenoid valves, applied to solenoid valves, such as... Figure 2 and Figure 3As shown, a vertical slide rail 11 and a horizontal liquid channel 6 are provided in the valve seat 1 of the solenoid valve. The middle section of the liquid channel 6 intersects with the lower part of the slide rail 11. On both sides of the intersection area of ​​the liquid channel 6 and the slide rail 11, the liquid channel forms two opposite ports, and a vertical guide surface 12 is provided at the port. The moving iron core 3 is slidably disposed in the slide rail 11. The moving iron core 3 is vertically disposed and its lower part extends into the intersection area. A horizontal through groove 31 is opened in the lower part of the moving iron core 3. Valves 5 are slidably disposed at both ends of the through groove 31. A compression spring 4 (i.e., an elastic element; in other embodiments, the elastic element may be a disc spring) is installed in the groove 31 between the valves 5. The two ends of the compression spring 4 abut against the corresponding valves 5. The sealing surface of the valve 5 abuts against the corresponding guide surface 12 and moves with the moving iron core 3 between the corresponding port and the guide surface 12. Both the guide surface 12 and the sealing surface are set as planes. The moving iron core 3 is controlled by an electromagnetic component installed in the valve seat 1 to move up and down within the slide rail 11. The electromagnetic component, through a return spring 23, causes the moving iron core 3 to abut downwards against the first... At the limiting position, a limiting block 13 is provided inside the valve seat 1 above the intersection area and corresponding to the position of the moving iron core 3. A stop plate 32 is provided at the lower end of the moving iron core 3 corresponding to the limiting block 13. When the moving iron core 3 drives the valve 5 to move to the port of the liquid channel 6 and seals the port, the stop plate 32 abuts downward against the limiting block 13 (i.e., the first limiting position). The electromagnetic assembly uses the electromagnetic coil 21 and the fixed iron core 22 to make the moving iron core 3 abut upward against the second limiting position. Specifically, the fixed iron core 22 is fixedly installed inside the valve seat 1 and located at the position of the moving iron core 3. Directly above, an electromagnetic coil 21 is sleeved outside the fixed iron core 22. A return spring 23 is vertically positioned and clamped between the fixed iron core 22 and the moving iron core 3. When the electromagnetic coil 21 is energized, the fixed iron core 22 attracts the moving iron core 3. The moving iron core 3 compresses the return spring 23 and stops at the fixed iron core 22 (i.e., the second limit position). When the moving iron core 3 is in the first limit position, the length of the return spring 23 at this time is recorded as the first compression length. When the moving iron core 3 is in the second limit position, the length of the return spring 23 at this time is recorded as the second compression length. The second compression length is less than the first compression length.

[0024] Specifically, the electromagnetic component drives the moving iron core 3 to move and causes the valve 5 to move between the guide surface 12 and the port; when the valve 5 completely covers the port, the valve 5 seals the port under the pressure of the compression spring 4; when the valve 5 is removed from the port, the liquid channel 6 returns to the open state.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A guided sliding sealing control method for a solenoid valve, applied to a solenoid valve, wherein a vertically movable iron core is disposed within the valve seat of the solenoid valve, and the vertical movement of the movable iron core is controlled by an electromagnetic assembly; characterized in that, Includes the following steps: One end of the liquid passage inside the valve seat is located on one side of the moving iron core, and a vertical guide surface is provided at this port; the valve is movably mounted on one side of the moving iron core in the transverse direction, and the valve is pressed against the guide surface by an elastic element, and the sealing surface of the valve is in contact with and slides with the guide surface; the guide surface is used to guide the valve to the port. The moving iron core is moved, causing the valve to move between the guide surface and the port; when the valve completely covers the port, the valve seals the port under the pressure of the elastic element; when the valve is removed from the port, the liquid passage is restored to the open state.

2. The guide sliding sealing control method for the solenoid valve according to claim 1, characterized in that: Both the guide surface and the sealing surface are set as planes.

3. The guide sliding sealing control method for the solenoid valve according to claim 1, characterized in that: The middle section of the liquid channel is set horizontally, and a notch is set in the middle section. Guide surfaces and ports of the liquid channel are formed on both sides of the notch. Valves and elastic elements are set on opposite sides of the moving iron core. When the moving iron core drives the valve to move to the port, the valves on opposite sides of the moving iron core simultaneously block and seal the corresponding ports.

4. The guide sliding sealing control method for the solenoid valve according to claim 3, characterized in that: The valves on opposite sides of the moving iron core are arranged in the same through groove, which is opened on the moving iron core. The elastic element is clamped between the valves on opposite sides of the moving iron core, and the valves are matched and slidably engaged with the side wall of the through groove.

5. The guide sliding sealing control method for the solenoid valve according to claim 1, characterized in that: The moving iron core is controlled by an electromagnetic component to move up and down repeatedly. Specifically: The electromagnetic component uses a return spring to cause the moving iron core to press downward against the first limit position; The electromagnetic component uses an electromagnetic coil and a fixed iron core to make the moving iron core press upward against the second limit position.

6. The guide sliding sealing control method for the solenoid valve according to claim 5, characterized in that: When the moving iron core is in the first limit position, the length of the return spring at this time is recorded as the first compression length; when the moving iron core is in the second limit position, the length of the return spring at this time is recorded as the second compression length, and the second compression length is less than the first compression length.

7. The guide sliding sealing control method for the solenoid valve according to claim 1, characterized in that: The elastic element is a helical extension spring or a disc spring.

8. A solenoid valve with a vertically actuated valve core, characterized in that: The method includes a guided sliding sealing control method for the solenoid valve as described in any one of claims 1 to 7.

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