High-frequency electromagnetic valve

Abstract

The utility model discloses a high-frequency electromagnetic valve which is mainly applied to occasions of high-frequency switches such as a pneumatic control system, a fuel oil and gas injection system, an execution system and an experimental test system, such as automatic equipment, fuel supply of an engine system, robot joint control and experimental instruments. Comprising a valve body assembly and a valve element assembly. The valve body assembly comprises a coil assembly, a sealing ring, a magnetism isolating sleeve, an upper cover and a valve body, the coil assembly is independently coated with plastic or integrally coated with the valve body, the static iron core is pressed into the upper cover of the valve body assembly, the valve element assembly is composed of a spring pin, a spring, a movable iron core, a limiting ring, a buffering cushion and a valve seat, and the movable iron core is matched with the limiting ring to move up and down. The whole electromagnetic valve is arranged in the valve body and forms sealing, the height of the movable iron core is only 1-2 mm, the contact area between the movable iron core and the inner diameter surface of the limiting ring can be reduced, and friction generated by actions and abrasion of the movable iron core can be reduced.

Description

Technical Field

[0001] This application relates to fields such as automated equipment, fuel supply for engine systems, robot joint control, and experimental instruments and equipment, with the main application being high-frequency switching solenoid valves. Background Technology

[0002] High-frequency solenoid valves, with their rapid response, precise control, and high durability, are increasingly widely used in mechanical fields such as automation equipment, engines, and robots. In industrial automation, the increasing demands for precision and efficiency have led to the miniaturization and intelligent upgrades of high-frequency solenoid valves, making them a core component for flexible manufacturing and smart factories. In engine applications, fuel supply systems require a stable, high-frequency fuel input; timely and accurate control of fuel injection and reliable operation are crucial. In robotics applications, high-frequency solenoid valves control pneumatic actuators to simulate muscle movement, enabling flexible joint movements; the rapid response of the actuator system effectively improves controllability.

[0003] In the process of realizing this invention, the inventors discovered at least the following problems in the prior art:

[0004] Traditional high-frequency solenoid valves have a slow opening response speed after being energized due to their structure. At the same time, they are difficult to meet the requirements of high precision and large flow. When the air volume demand is large, the air volume cannot be accurately controlled, or it is necessary to increase the number of solenoid valves to meet the air volume demand, which makes it difficult for the actuator to respond quickly and accurately. Utility Model Content

[0005] The purpose of this application is to provide a high-frequency solenoid valve to solve the technical problems of slow response speed, low control accuracy and high manufacturing cost in existing products.

[0006] The technical solution is as follows:

[0007] A high-frequency solenoid valve includes a valve body assembly and a valve core assembly;

[0008] The valve body assembly includes a valve body, a coil assembly, a top cover, a magnetic shielding sleeve, a first sealing ring, a second sealing ring, and a stationary iron core. The first sealing ring, the magnetic shielding sleeve, the coil assembly, and the top cover are sequentially placed inside the valve body. The lower surface of the magnetic shielding sleeve contacts the valve body. The first sealing ring ensures a seal between the magnetic shielding sleeve and the valve body. The top cover and the valve body are fixedly connected. The stationary iron core and the magnetic shielding sleeve are sealed by the second sealing ring. The stationary iron core is fixedly connected to the top cover.

[0009] The valve core assembly includes a spring pin, a spring, a buffer pad, a moving iron core, a limiting ring, and a valve seat. The spring pin and the stationary iron core are interference-fitted together. The spring pin provides support for the spring. The spring, buffer pad, moving iron core, limiting ring, and valve seat are sequentially placed inside the valve body assembly. The buffer pad contacts the valve body, and the limiting ring contacts the inner hole of the valve body. The moving iron core cooperates with the limiting ring and reciprocates within the limiting ring under the support of the spring. A valve port is provided below the valve seat. The valve body, valve seat, and valve port are fixedly connected and maintain a seal.

[0010] Furthermore, the coil assembly is individually plastic-coated or integrally plastic-coated with the valve body.

[0011] Furthermore, the upper cover and the valve body are connected by welding, riveting or threading, the stationary iron core and the upper cover are connected by interference fit or welding, and the valve port and the valve body are connected by riveting or welding.

[0012] Furthermore, a fourth sealing ring and a third sealing ring are used to provide a seal between the valve body, valve seat and valve port.

[0013] Furthermore, the valve port is a medium outlet, with a lower buffer pad installed below it, and is sealed by a sixth sealing ring.

[0014] Furthermore, a filter screen is installed at the medium inlet, and an upper buffer pad is installed below it, which is then sealed by a fifth sealing ring.

[0015] Furthermore, the valve seat adopts an annular flow channel.

[0016] Furthermore, the height of the moving iron core is 1-2mm.

[0017] Furthermore, the spring pin and the stationary iron core are connected by an interference fit.

[0018] Furthermore, in the valve core assembly, the moving iron core and the valve body are separated by the buffer pad.

[0019] The technical solutions provided by the embodiments of this application may include the following beneficial effects:

[0020] As can be seen from the above embodiments, the height of the moving iron core of the solenoid valve used in this application is only 1-2mm, which reduces the contact area with the inner diameter surface of the limiting ring, thereby reducing friction and wear of the moving iron core during operation. Furthermore, the overall mass of the moving iron core is small, enabling rapid response under the same driving current. The solenoid valve stroke is accurately controlled by the height difference between the moving iron core and the limiting ring, reducing the impact of stroke fluctuations on flow rate. The valve seat adopts an annular flow channel, resulting in a larger flow area. Under the same flow rate, the required moving iron core stroke is smaller, which also contributes to the rapid response of the solenoid valve. The overall structure is assembled by riveting or welding, relying on a sealing ring for sealing. The assembly process is simpler and more controllable, effectively reducing assembly difficulty and better meeting economic requirements.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0023] Figure 1 This is a cross-sectional view of a high-frequency solenoid valve according to an exemplary embodiment.

[0024] Figure 2 This is a schematic diagram of a valve seat according to an exemplary embodiment.

[0025] In the diagram: 1. Filter screen; 2. Fifth sealing ring; 3. Upper buffer pad; 4. Stationary iron core; 5. Top cover; 6. Second sealing ring; 7. Spring pin; 8. Magnetic shielding sleeve; 9. Coil assembly; 10. First sealing ring; 11. Buffer pad; 12. Limiting ring; 13. Fourth sealing ring; 14. Valve seat; 15. Valve port; 16. Sixth sealing ring; 17. Lower buffer pad; 18. Third sealing ring; 19. Moving iron core; 20. Valve body; 21. Spring. Detailed Implementation

[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0027] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0028] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0029] Figure 1 This is a cross-sectional view of a high-frequency solenoid valve according to an exemplary embodiment, such as... Figure 1 As shown, this high-frequency solenoid valve can be applied to high-frequency switching control applications such as pneumatic control systems, fuel and gas injection systems, execution systems, and experimental testing systems, such as automated equipment, fuel supply for engine systems, robot joint control, and experimental instruments. It can include valve body assembly and valve core assembly.

[0030] The valve body assembly includes a valve body 20, a coil assembly 9, an upper cover 5, a magnetic shielding sleeve 8, a first sealing ring 10, a second sealing ring 6, and a stationary iron core 4. The first sealing ring 10, the magnetic shielding sleeve 8, the coil assembly 9, and the upper cover 5 are sequentially placed inside the valve body 20. The lower surface of the magnetic shielding sleeve 8 is in contact with the valve body 20. The first sealing ring 10 satisfies the sealing between the magnetic shielding sleeve 8 and the valve body 20. The upper cover 5 is fixedly connected to the valve body 20. The stationary iron core 4 and the magnetic shielding sleeve 8 are sealed by the second sealing ring 6. The stationary iron core 4 is fixedly connected to the upper cover 5.

[0031] The valve core assembly includes a spring pin 7, a spring 21, a buffer pad 11, a moving iron core 19, a limiting ring 12, and a valve seat 14. The spring pin 7 and the stationary iron core 4 are interference-fitted together. The spring pin 7 provides support for the spring 21. The spring 21, buffer pad 11, moving iron core 19, limiting ring 12, and valve seat 14 are sequentially placed inside the valve body assembly. The buffer pad 11 contacts the valve body 20, and the limiting ring 12 contacts the inner hole of the valve body 20. The moving iron core 19 cooperates with the limiting ring 12, and the moving iron core 19 reciprocates within the limiting ring 12 under the support of the spring 21. A valve port 15 is provided below the valve seat 14 (when the high-frequency solenoid valve is placed with the inlet at the top and the outlet at the bottom, the direction of medium flow is referred to as "below"). The valve body 20, valve seat 14, and valve port 15 are fixedly connected and kept sealed.

[0032] Specifically, the valve body assembly includes a valve body 20, a coil assembly 9, an upper cover 5, a magnetic shielding sleeve 8, a first sealing ring 10, a second sealing ring 6, and a stationary iron core 4. The first sealing ring 10 and the magnetic shielding sleeve 8 are sequentially placed inside the valve body 20, with the lower surface of the magnetic shielding sleeve 8 contacting the valve body 20. The first sealing ring 10 provides a seal between the magnetic shielding sleeve 8 and the valve body 20. The coil assembly 9 and the upper cover 5 are then sequentially arranged. The upper cover 5 and the valve body 20 are connected by welding, riveting, or threading to provide the necessary seal. The connection strength is improved while simplifying the assembly process; the stationary iron core 4 and the magnetic shielding sleeve 8 are sealed by the second sealing ring 6, and the stationary iron core 4 and the upper cover 5 are connected by interference fit or welding to meet the required connection strength; the valve core assembly includes a spring pin 7, a spring 21, a buffer pad 11, a moving iron core 19, a limiting ring 12, and a valve seat 14. The spring pin 7 and the stationary iron core 4 of the valve body assembly are interference fitted, and the spring pin 7 provides support for the spring 21. The spring 21, the buffer pad 11, and the moving iron core... 19. The limiting ring 12 and valve seat 14 are sequentially placed inside the valve body assembly. The buffer pad 11 contacts the valve body 20 in the valve body assembly, and the limiting ring 12 contacts the inner hole of the valve body 20. The moving iron core 19 cooperates with the limiting ring 12. The moving iron core 19 reciprocates within the limiting ring 12 under the support of the spring 21. The opening and closing of the solenoid valve is realized by the energization and de-energization of the coil assembly. The stroke is controlled by the height difference between the moving iron core and the limiting ring. The buffer pad 11 is used to ensure the high-frequency impact of the moving iron core. It will not cause the valve body to deform and fail. The valve seat 14 is used to achieve a seal between the valve and the moving iron core 19 during the valve opening and closing process. The fourth sealing ring 13 and the third sealing ring 18 provide a seal between the valve body 20, the valve seat 14 and the valve port 15. That is, the third sealing ring 18 is located between the valve port 15 and the valve body 20, and the fourth sealing ring 13 is located between the valve seat 14 and the valve body 20. The valve port 15 and the valve body 20 are connected by riveting or welding, and the connection strength required by actual needs is met.

[0033] The coil assembly 9 is individually or as a whole coated with plastic, and the finished product can be assembled into the valve body 20 or integrally coated with plastic with the valve body 20.

[0034] The valve port 15 is the medium outlet, with a lower buffer pad 17 installed below it and sealed by a sixth sealing ring 16; a filter screen 1 is installed at the medium inlet, with an upper buffer pad 3 installed below it and sealed by a fifth sealing ring 2. This satisfies the basic installation, filtration, and inlet / outlet sealing requirements.

[0035] Specifically, the spring pin 7, spring 21, buffer pad 11, limit ring 12, moving iron core 19 and valve seat 14 of the valve core assembly can be placed into the valve body in sequence. The assembly process is simple and easy. The spring pin 7 and the stationary iron core 4 are interference-fitted, and the spring force can be adjusted by changing the assembly position.

[0036] Specifically, the moving iron core 19 can move up and down under the drive of the coil assembly 9. When the high-frequency solenoid valve is de-energized, the moving iron core 19 and the valve seat 14 are in contact under the action of the spring 21, and the valve port 15 is in a closed state. When the high-frequency solenoid valve is energized, the moving iron core 19 and the stationary iron core 4 overcome the resistance of the spring 21 and are attracted together, the moving iron core 19 and the valve seat 14 are separated, and the valve port 15 is in an open state.

[0037] Specifically, the upper cover 5 and the valve body 20 are connected by riveting or welding, which simplifies the assembly steps and facilitates assembly.

[0038] Specifically, the stationary iron core 4 and the upper cover 5 are connected by an interference fit. The interference force can ensure the connection strength without the need for additional welding steps, which is beneficial for assembly.

[0039] Specifically, the valve body 20 and the magnetic shielding sleeve 8 are sealed by a sealing ring, and the stationary iron core 4 and the magnetic shielding sleeve 8 are sealed by a sealing ring, thereby achieving a sealed connection between any two. In one embodiment, the stationary iron core 4 and the magnetic shielding sleeve 8 are assembled by press fitting, eliminating the need for welding to ensure strength and sealing.

[0040] Specifically, in the valve core assembly, the spring pin 7 and the stationary iron core 4 are connected by an interference fit and pressed to the required installation height of the spring 21. When the installation force of the spring 21 needs to be adjusted, it can be flexibly adjusted by adjusting the height of the spring pin 7.

[0041] Specifically, the moving iron core 19 can realize the opening and closing of the solenoid valve under the action of electromagnetic force. The moving iron core 19 and the limiting ring 12 are in frictional contact. Since the moving iron core 19 is relatively thin, it can effectively reduce the contact surface with the inner diameter of the limiting ring and reduce the friction force. The buffer pad 11 can disperse the impact force of the moving iron core 19 and prevent the valve body 20 from deforming due to the impact of the moving iron core 19.

[0042] In this embodiment, the moving iron core 19 and the limiting ring 12 are heat-treated to improve their surface hardness, making their contact area more wear-resistant. At the same time, the buffer pad 11 is also made of a high-hardness material, which can withstand the impact force of the moving iron core 19. By controlling the height of the moving iron core 19 and the limiting ring 12, the working stroke of the high-frequency solenoid valve can be accurately controlled, so that the consistency of the product can be better guaranteed.

[0043] Specifically, the buffer pad 11 can not only disperse the impact force generated by the moving iron core 19, but also reduce the electromagnetic force between the moving iron core 19 and the stationary iron core 4 when the valve is open, thereby improving the response speed.

[0044] Specifically, the valve seat 14 adopts an annular flow channel design, and the sealing line consists of two annular bands. When the moving iron core 19 is open, it can seal the air intake on both sides of the annular bands. Figure 2 As shown, while ensuring the flow rate at valve port 15, simultaneous air intake from the middle and both sides can reduce the stroke requirement of the moving iron core 19, and the overall consistency is more conducive to improvement.

[0045] Specifically, the valve body 20 and the valve port 15 are connected by riveting or welding, which is simple in structure and more conducive to assembly.

[0046] The working process / working principle of a high-frequency solenoid valve provided in this application includes:

[0047] When the product is not powered on, the moving iron core 19 is not subject to electromagnetic force and, under the action of the spring 21, contacts the valve seat 14 to form a seal, keeping it closed and preventing the medium from flowing. When the product is powered on, the coil assembly generates a magnetic field, and the moving iron core 19, the stationary iron core 4, the upper cover 5, and the valve body 20 together form a magnetic circuit. Under the action of electromagnetic force, the moving iron core 19 separates from the valve seat 14, keeping it open, and the medium can flow from the inlet to the outlet.

[0048] In summary, the solenoid valve used in this application has a moving iron core height of only 1-2mm, which reduces the contact area with the inner diameter surface of the limiting ring, thereby reducing friction and wear of the moving iron core during operation. Furthermore, the small overall mass of the moving iron core allows for rapid response under the same driving current. The solenoid valve stroke is accurately controlled by the height difference between the moving iron core and the limiting ring, reducing the impact of stroke fluctuations on flow rate. The valve seat uses an annular flow channel, resulting in a larger flow area. Under the same flow rate, the required moving iron core stroke is smaller, which also contributes to the rapid response of the solenoid valve. The overall structure is assembled by riveting or welding, relying on a sealing ring for sealing. This simplifies and controls the assembly process, effectively reducing assembly difficulty and better meeting economic requirements.

[0049] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0050] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A high-frequency solenoid valve, characterized in that, Includes valve body assembly and valve core assembly; The valve body assembly includes a valve body, a coil assembly, a top cover, a magnetic shielding sleeve, a first sealing ring, a second sealing ring, and a stationary iron core. The first sealing ring, the magnetic shielding sleeve, the coil assembly, and the top cover are sequentially placed inside the valve body. The lower surface of the magnetic shielding sleeve contacts the valve body. The first sealing ring ensures a seal between the magnetic shielding sleeve and the valve body. The top cover and the valve body are fixedly connected. The stationary iron core and the magnetic shielding sleeve are sealed by the second sealing ring. The stationary iron core is fixedly connected to the top cover. The valve core assembly includes a spring pin, a spring, a buffer pad, a moving iron core, a limiting ring, and a valve seat. The spring pin and the stationary iron core are interference-fitted together. The spring pin provides support for the spring. The spring, buffer pad, moving iron core, limiting ring, and valve seat are sequentially placed inside the valve body assembly. The buffer pad contacts the valve body, and the limiting ring contacts the inner hole of the valve body. The moving iron core cooperates with the limiting ring and reciprocates within the limiting ring under the support of the spring. A valve port is provided below the valve seat. The valve body, valve seat, and valve port are fixedly connected and maintain a seal.

2. The high-frequency solenoid valve according to claim 1, characterized in that, The coil assembly is individually plastic-coated or integrally plastic-coated with the valve body.

3. The high-frequency solenoid valve according to claim 1, characterized in that, The upper cover and the valve body are connected by welding, riveting or threading, the stationary iron core and the upper cover are connected by interference fit or welding, and the valve port and the valve body are connected by riveting or welding.

4. The high-frequency solenoid valve according to claim 1, characterized in that, The valve body, valve seat, and valve port are sealed by the fourth and third sealing rings.

5. The high-frequency solenoid valve according to claim 1, characterized in that, The valve port is the medium outlet, with a lower buffer pad installed below it, and is sealed by a sixth sealing ring.

6. The high-frequency solenoid valve according to claim 1, characterized in that, A filter screen is installed at the medium inlet, and an upper buffer pad is installed below it, which is then sealed by a fifth sealing ring.

7. The high-frequency solenoid valve according to claim 1, characterized in that, The valve seat adopts an annular flow channel.

8. The high-frequency solenoid valve according to claim 1, characterized in that, The height of the moving iron core is 1-2mm.

9. The high-frequency solenoid valve according to claim 1, characterized in that, In the valve core assembly, the moving iron core and the valve body are separated by the buffer pad.

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