High-vacuum electromagnetic valve

Abstract

The utility model discloses a high vacuum solenoid valve which comprises a valve body and an electromagnetic control device, the valve body is provided with a flow channel, the electromagnetic control device is internally provided with a static iron core and a movable iron core which movably blocks the flow channel, the movable iron core is sleeved with a guide pipe, the end portion opposite to the static iron core is provided with a spiral groove, and the end, facing the valve body, of the movable iron core is provided with a rivet ring. The rivet ring is internally provided with an anti-leakage gasket which abuts against the end portion of the movable iron core. According to the high-vacuum electromagnetic valve, the structural framework arrangement is optimized, assembling is facilitated, the sealing performance is improved, the guide pipe is arranged on the outer side of the movable iron core, the QPQ processing technology is conducted on the guide pipe, outer surface processing is conducted on the guide pipe, the abrasion resistance is improved, the starting performance is better, the spring abuts against the end of the movable iron core, and the spiral groove is formed. The spiral dimpled grains enhance electromagnetic force through the edge magnetic field concentration effect in the initial stage of movement, viscous friction is reduced, the response speed is increased, and the electromagnetic iron core responds faster.

Description

Technical Field

[0001] This utility model relates to the field of vacuum solenoid valve technology, specifically to a high vacuum solenoid valve. Background Technology

[0002] Solenoid valves are fundamental automation components used to control fluids. They are actuators, not limited to hydraulic or pneumatic systems. Different solenoid valves function in different positions within a control system. The most common types are check valves, safety valves, directional control valves, speed control valves, and solenoid valves. Existing solenoid valves can be used for vacuuming equipment, hence the name vacuum solenoid valves. Vacuum solenoid valves require strict sealing and require the opening and closing of the valve port to be controlled by the energization of an electromagnet. Vacuum solenoid valves are suitable for working media such as air and non-corrosive gases. Utility Model Content

[0003] The purpose of this invention is to provide a high-vacuum solenoid valve that improves response speed and performance by optimizing the internal structure and setting a spiral groove structure on the moving iron core.

[0004] The technical solution adopted by this utility model is as follows: a high vacuum solenoid valve, including a valve body and an electromagnetic control device. The valve body is provided with a flow channel. The electromagnetic control device is provided with a stationary iron core and a movable iron core that blocks the flow channel. The movable iron core is covered with a guide tube. The end of the movable iron core relative to the stationary iron core is provided with a spiral groove. The end of the movable iron core facing the valve body is provided with a rivet ring. The rivet ring is provided with a leak-proof gasket that abuts against the end of the movable iron core.

[0005] As a further feature of the above scheme, the flow channel is located in the valve body and has an inlet and an outlet. A valve cavity is opened on the side between the inlet and the outlet. A gasket is provided between the electromagnetic control device and the valve body for sealing installation. The sealing installation of the two closes the opening of the valve cavity relative to the valve body. A check valve seat with a flow hole is also provided in the valve cavity facing the electromagnetic control device.

[0006] As a further feature of the above scheme, the rivet ring is provided with a leak-proof port in the middle. The size of the leak-proof port is larger than the diameter of the leak-proof valve seat. The leak-proof gasket is made of hydrogenated nitrile rubber material and is used to abut against the leak-proof valve seat under the moving pressure of the moving iron core to block the flow hole and cut off the flow channel.

[0007] As a further feature of the above solution, the pressure relief gasket is provided with a pressure relief channel, the moving iron core is provided with a groove surface, and the rivet ring is provided with a relief hole.

[0008] As a further feature of the above solution, a spring is provided between the guide tube and the moving iron core, and the guide tube has a ring edge, which is clamped and fixed by an electromagnetic control device and the valve body.

[0009] As a further improvement to the above scheme, both the conduit and the moving iron core are processed using the QPQ process for external surface treatment.

[0010] Beneficial effects: The high vacuum solenoid valve of this utility model has an optimized structural architecture, which facilitates assembly and improves sealing performance. A conduit is set on the outside of the moving iron core and the outer surface is treated with QPQ process to improve wear resistance and improve starting performance. A spring is abutted at the end of the moving iron core and a spiral groove is set. The spiral groove enhances the electromagnetic force through the edge magnetic field concentration effect in the initial stage of movement (at the maximum air gap), reduces viscous friction, improves response speed, and makes the electromagnetic iron core respond faster. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the high-vacuum solenoid valve structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the internal structure of the high-vacuum solenoid valve in this embodiment.

[0013] Figure 3 This is an exploded view of the high-vacuum solenoid valve assembly in this embodiment.

[0014] Figure 4 This is a schematic diagram of the internal structure of the electromagnetic control device in this embodiment.

[0015] Reference numerals: 1. Valve body; 11. Inlet; 12. Outlet; 13. Valve cavity; 14. Check valve seat; 17. Flow hole; 18. Washer; 2. Electromagnetic control device; 20. Spiral groove; 21. Stationary iron core; 22. Moving iron core; 23. Rivet ring; 24. Check gasket; 25. Check port; 27. Groove surface; 28. Pressure relief channel; 3. Flow channel; 30. Guide tube; 31. Spring; 32. Ring edge. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0017] like Figure 1-4 The high vacuum solenoid valve shown includes a valve body 1 and an electromagnetic control device 2. The valve body 1 is provided with a flow channel 3. The electromagnetic control device 2 is provided with a stationary iron core 21 and a movable iron core 22 that blocks the flow channel 3. The movable iron core 22 is covered with a guide tube 30. The end of the movable iron core 22 opposite to the stationary iron core 21 is provided with a spiral groove 20. The end of the movable iron core 22 facing the valve body 1 is provided with a rivet ring 23. The rivet ring 23 is provided with a leak-proof gasket 24 that abuts against the end of the movable iron core 22.

[0018] As a further provision of the above scheme, the flow channel 3 is located inside the valve body 1 and is provided with an inlet 11 and an outlet 12. A valve cavity 13 is opened on the side between the inlet 11 and the outlet 12. A gasket 18 is provided between the electromagnetic control device 2 and the valve body 1 for sealing installation. The sealing installation of the two closes the opening of the valve cavity 13 relative to the valve body 1. The valve cavity 13 is also provided with a check valve seat 14 with a flow hole 17 facing the electromagnetic control device 2.

[0019] As a further feature of the above scheme, the rivet 23 is provided with a leak-proof port 25 in the middle. The size of the leak-proof port 25 is larger than the diameter of the leak-proof valve seat 14. The leak-proof gasket 24 is made of hydrogenated nitrile rubber material and is used to abut against the leak-proof valve seat 14 under the moving iron core 22 to block the flow hole 17 and cut off the flow channel 3.

[0020] As a further feature of the above scheme, the anti-leakage gasket 24 is provided with a pressure relief channel 28, the moving iron core 22 is provided with a groove surface 27, and the rivet ring 23 is provided with a leakage hole.

[0021] As a further provision of the above scheme, a spring 31 is provided between the conduit 30 and the moving iron core 22, and the conduit 30 is provided with an annular edge 32, which is clamped and fixedly installed by the electromagnetic control device 2 and the valve body 1.

[0022] The vacuum solenoid valve of this utility model is achieved through, for example... Figure 3 As shown, in this embodiment, a guide tube 30 is sleeved on the outside of the moving iron core 22. Both the moving iron core 22 and the guide tube 30 are processed by QPQ process to make the guide tube 30 and the moving iron core 22 more wear-resistant, the electromagnet has a longer service life and better starting performance.

[0023] Furthermore, a spiral groove 20 is provided on the attraction surface of the moving iron core 22 relative to the stationary iron core 21, and a spring 31 is also provided. The spring 31 is used to push the moving iron core 22 away and to buffer the moving iron core 22, so as to prevent the moving iron core 22 from colliding and damaging the spiral groove 20 when it moves towards the stationary iron core 21. In addition, the other end of the moving iron core 22 in this embodiment is provided with a rivet groove to install a rivet ring 23. The cavity between the rivet ring 23 and the moving iron core 22 is filled with a leak-proof gasket 24. It is worth noting that the rivet ring 23 is provided with a leak-proof port 25, so that when the moving iron core 22 moves away from the stationary iron core 21, the leak-proof gasket 24 abuts against the leak-proof valve seat 14 to block the flow hole 17.

[0024] Furthermore, in this embodiment, the anti-leakage gasket 24 is provided with a pressure relief channel 28, the side of the moving iron core 22 is provided with a groove surface 27, and the rivet ring 23 is provided with a vent hole. The grooves of the above three are connected. When the moving iron core 22 moves within the fixed conduit 30, the outer wall of the moving iron core 22 moves against the inner side of the conduit 30. The side of the moving iron core 22 is also provided with a groove surface 27, which constitutes the airflow inlet and outlet passage between the moving iron core 22 and the bottom of the conduit 30, and is connected to the pressure relief channel 28 provided on the anti-leakage gasket 24. The pressure relief channel 28 is connected to the vent hole. As described above, when the moving iron core 22 moves within the fixed conduit 30, it facilitates the exhaust and intake of air within the conduit 30, avoids the moving iron core 22 from having a piston-like structure, avoids the compression of air pressure to restrict the moving iron core 22, and avoids affecting the response speed of the moving iron core 22.

[0025] In addition, such as Figure 3 The electromagnetic control device 2 shown in this embodiment includes a bracket, a conductive sheet, and an electromagnetic coil disposed inside the housing. The electromagnetic control device 2 in this embodiment has a simple structure.

[0026] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A high-vacuum solenoid valve, comprising a valve body (1) and an electromagnetic control device (2), wherein the valve body (1) is provided with a flow channel (3), and the electromagnetic control device (2) is provided with a stationary iron core (21) and a movable iron core (22) that blocks the flow channel (3), characterized in that: The moving iron core (22) is fitted with a guide tube (30), and the end opposite to the stationary iron core (21) is provided with a spiral groove (20). The end of the moving iron core (22) facing the valve body (1) is provided with a rivet ring (23), and the rivet ring (23) is provided with a leak-proof gasket (24) that abuts against the end of the moving iron core (22).

2. The high-vacuum solenoid valve according to claim 1, characterized in that: The flow channel (3) is located inside the valve body (1) and has an inlet (11) and an outlet (12). A valve chamber (13) is opened on the side between the inlet (11) and the outlet (12). A gasket (18) is provided between the electromagnetic control device (2) and the valve body (1) for sealing installation. The sealing installation of the two closes the opening of the valve chamber (13) relative to the valve body (1). The valve chamber (13) is also provided with a check valve seat (14) with a flow hole (17) facing the electromagnetic control device (2).

3. A high-vacuum solenoid valve according to claim 2, characterized in that: The rivet (23) has a leak-proof port (25) in the middle. The size of the leak-proof port (25) is larger than the diameter of the leak-proof valve seat (14). The leak-proof gasket (24) is made of hydrogenated nitrile rubber and is used to block the flow hole (17) and cut off the flow channel (3) by abutting against the leak-proof valve seat (14) under the moving iron core (22) moving pressure.

4. A high-vacuum solenoid valve according to claim 1, characterized in that: The pressure relief gasket (24) is provided with a pressure relief channel (28), the moving iron core (22) is provided with a groove surface (27), and the rivet ring (23) is provided with a relief hole.

5. A high-vacuum solenoid valve according to claim 1, characterized in that: A spring (31) is provided between the conduit (30) and the moving iron core (22). The conduit (30) is provided with an annular edge (32), which is clamped and fixed by the electromagnetic control device (2) and the valve body (1).

6. A high-vacuum solenoid valve according to claim 5, characterized in that: Both the conduit (30) and the moving iron core (22) are processed using the QPQ process for surface treatment.

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