Explosion-proof electromagnetic valve
By introducing slide chutes, sealing blocks and spring components into the explosion-proof solenoid valve, the wear problem between the moving iron core and the valve body inlet and outlet is solved, and higher sealing and reliability are achieved.
Patent Information
- Application Number
- CN202422385695.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-09-29
AI Technical Summary
Under the long-term use of the explosion-proof solenoid valve, the contact surface between the moving iron core and the inlet and outlet of the valve body wears, resulting in a reduction in sealing.
A structure including a slide chute, a sealing block, a spring assembly and a manual switch is designed. Through the cooperation of the sealing block in the slide chute and the spring assembly, the collision force between the moving iron core and the pilot seat is reduced, and the core is driven by a manual switch when the coil is energized or malfunctioned to separate the inlet and outlet.
It effectively reduces wear between the moving iron core and the inlet and outlet of the pilot seat, improves sealing and reliability, and ensures the normal operation of the solenoid valve.
Smart Images
Figure CN223203818U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of solenoid valves, and in particular to an explosion-proof solenoid valve. Background Art
[0002] A flameproof solenoid valve encloses all components that could ignite an explosive gas mixture within a single enclosure. This enclosure is designed to withstand the internal explosion of a flammable mixture that penetrates through any joints or structural gaps within the enclosure without damage, and will not ignite an explosive atmosphere created by one or more gases or vapors. Components that could generate sparks, arcs, or dangerous temperatures are enclosed within the flameproof enclosure, isolating the interior of the device from the surrounding environment. The solenoid coil of a flameproof solenoid valve consists of a coil, a support frame, a moving iron core assembly, and a stationary iron core assembly. The moving iron core assembly includes a moving iron core and a drive spring. When the coil is energized, a magnetic force is generated within the coil that attracts the moving iron core, compressing the drive spring. When the coil is de-energized, the drive spring forces the lower end of the moving iron core to close the valve body's inlet and outlet. During this process, the moving iron core collides with the valve body's inlet and outlet under the action of the drive spring. Over time, the contact surface between the moving iron core and the valve body's inlet and outlet wears, reducing the seal between the moving iron core and the valve body's inlet and outlet. Utility Model Content
[0003] The purpose of the utility model is to provide a flameproof solenoid valve to address the defects and shortcomings of the existing technology.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] The cam is secured to a position 560° and has a cam face, wherein the cam face is secured to a position 560° and abuts against the valve body, wherein the cam face is secured to a position 560° and abuts the valve body.
[0006] Preferably, a limiting groove is provided on the inner peripheral side of the lower end of the sliding groove, and the sealing block is slidably inserted into the limiting groove.
[0007] Preferably, the upper end of the slide groove is through-opened, a top block is provided in the upper end of the slide groove, and the upper end of the spring assembly abuts against the side wall of the top block.
[0008] Preferably, the spring assembly includes a separator, a first spring and a second spring, and the first spring and the second spring are located on the upper and lower sides of the separator.
[0009] Preferably, the drive spring is arranged in a conical shape, the drive spring is sleeved on the circumference of the moving iron core body, the lower end of the drive spring abuts against the side wall of the moving iron core body, and the other end of the drive spring abuts against the lower end of the support frame.
[0010] Preferably, a manual switch is rotatably connected to the side wall of the pilot seat, and an eccentric disk is provided at the inner end of the manual switch, and the eccentric disk corresponds to the moving iron core body.
[0011] Preferably, a limit rod is provided on the side wall of the manual switch, and a ring groove for sliding movement of the limit rod is opened circumferentially on the circumference of the manual switch, and the limit rod is inserted and fixed in the side wall of the pilot seat.
[0012] In summary, this application includes at least one of the following beneficial technical effects:
[0013] 1. After the coil assembly is energized, the coil body generates magnetic force, thereby attracting the moving iron core body, causing the moving iron core body to slide upward, and then separating the lower end of the moving iron core body from the inlet and outlet of the pilot seat. Then, the channel of the solenoid valve is opened. After the coil assembly stops working, the moving iron core body is driven downward by the action of the driving spring. When the lower end of the moving iron core body contacts the inlet and outlet of the pilot seat, the sealing block slides into the slide groove, thereby compressing the first spring and the second spring, allowing the sealing block to act as a buffer, thereby reducing the collision force between the moving iron core body and the pilot seat, and reducing the wear efficiency between the moving iron core body and the inlet and outlet of the pilot seat;
[0014] 2. After the coil assembly is energized, the coil body generates magnetic force to attract the moving iron core body, causing the moving iron core body to contact the static iron core assembly. The top block then slides into the slide groove, thereby compressing the first and second springs, reducing the collision force between the moving iron core body and the static iron core assembly.
[0015] 3. When the coil assembly fails, the manual switch can be turned to drive the eccentric disk to rotate, so that the side wall of the eccentric disk contacts the lower end of the moving iron core body, thereby lifting the moving iron core body and separating the moving iron core body from the inlet and outlet of the pilot seat. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a top view of the solenoid valve of the utility model;
[0017] Figure 2 yes Figure 1 Schematic cross-sectional view of AA in the figure;
[0018] Figure 3 yes Figure 2 Enlarged view of point A in the middle.
[0019] In the figure: 1. First valve body; 2. Second valve body; 3. Coil assembly; 4. Pilot seat; 5. Inlet and outlet; 6. Outer shell; 7. Coil body; 8. Support frame; 9. Moving iron core assembly; 10. Static iron core assembly; 11. Moving iron core body; 12. Drive spring; 13. Ring seat; 14. Slide groove; 15. Limit groove; 16. Sealing block; 17. Top block; 18. Spring assembly; 19. Separator; 20. First spring; 21. Second spring; 22. Manual switch; 23. Eccentric disk; 24. Ring groove; 25. Limit rod. DETAILED DESCRIPTION
[0020] The present invention will be further described below with reference to the accompanying drawings.
[0021] The embodiment of the present application discloses a flameproof solenoid valve.
[0022] Reference Figure 1 and Figure 2 , including a first valve body 1, a second valve body 2, a coil assembly 3 and a pilot seat 4. The first valve body 1 is installed and fixed on the side wall of the pilot seat 4, the coil assembly 3 is installed and fixed on the upper end of the pilot seat 4, the second valve body 2 is installed and fixed on the side wall of the coil assembly 3, and the pilot seat 4 has an inlet and outlet 5. The first valve body 1 is a two-position five-position solenoid valve.
[0023] Reference Figure 2 and Figure 3 The coil assembly 3 includes a shell 6, a coil body 7, a support frame 8, a moving iron core assembly 9 and a static iron core assembly 10. The lower end of the shell 6 is fixed to the upper end surface of the pilot seat 4 by bolts, and the support frame 8 is fixed in the shell 6. The coil body 7 is sleeved and fixed on the circumferential side of the support frame 8. The moving iron core assembly 9 and the static iron core assembly 10 are placed correspondingly up and down and are located in the support frame 8. The moving iron core assembly 9 includes a moving iron core body 11 and a driving spring 12. The driving spring 12 is conical in shape. A ring seat 13 is circumferentially integrated on the outer peripheral side of the lower end of the moving iron core body 11. The lower end of the driving spring 12 abuts against the upper end surface of the ring seat 13, and the upper end of the driving spring 12 abuts against the lower end surface of the pilot seat 4.
[0024] A chute 14 is vertically opened in the movable iron core body 11, and the upper and lower ends of the chute 14 are through-opened. The movable iron core body 11 is provided with a limit groove 15 in the lower end of the chute 14. A sealing block 16 is slidingly limited in the limit groove 15. The upper end of the chute 14 is stepped. A top block 17 is slidingly inserted into the upper end of the chute 14. The vertical section of the top block 17 is in the shape of a "convex" character. A spring assembly 18 is placed between the top block 17 and the sealing block 16. The spring assembly 18 includes a separator 19, a first spring 20 And the second spring 21, the vertical section of the separator 19 is two symmetrical "J" shapes, the first spring 20 and the second spring 21 are located on the upper and lower sides of the separator 19, one end of the first spring 20 abuts against the side wall of the top block 17, and the other end of the first spring 20 abuts against the groove of the separator 19, one end of the second spring 21 abuts against the side wall of the sealing block 16, and the other end of the second spring 21 abuts against the lower end surface of the separator 19, and the sealing block 16 and the inlet and outlet 5 correspond to each other in the upper and lower directions. After the coil assembly 3 is energized, the coil body 7 generates magnetic force, thereby attracting the moving iron core body 11, causing the moving iron core body 11 to slide upward, and then separate the lower end of the moving iron core body 11 from the inlet and outlet 5 of the pilot seat 4, and then the channel of the solenoid valve is opened. After the coil assembly 3 stops working, the moving iron core body 11 is driven downward by the action of the driving spring 12. When the lower end of the moving iron core body 11 contacts the inlet and outlet 5 of the pilot seat 4, the sealing block 16 then slides into the slide groove 14, thereby compressing the first spring 20 and the second spring 21, allowing the sealing block 16 to act as a buffer, thereby reducing the collision force between the moving iron core body 11 and the pilot seat 4.
[0025] A manual switch 22 is rotatably connected to the inner side wall of the pilot seat 4. An eccentric disk 23 is integrally provided at the inner end of the manual switch 22. An annular groove 24 is circumferentially formed around the circumference of the manual switch 22. A limit rod 25 is fixedly inserted into the side wall of the pilot seat 4, with one end of the limit rod 25 sliding within the annular groove 24. When a fault occurs in the coil assembly 3, the manual switch 22 can be rotated, which in turn drives the eccentric disk 23 to rotate, causing the side wall of the eccentric disk 23 to contact the lower end of the movable iron core body 11, thereby lifting the movable iron core body 11 and separating the movable iron core body 11 from the inlet and outlet 5 of the pilot seat 4.
[0026] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.
Claims
1. A flameproof solenoid valve, comprising a first valve body (1), a second valve body (2), a coil assembly (3) and a pilot seat (4), wherein one end of the first valve body (1) is arranged on one side of the pilot seat (4), the coil assembly (3) is arranged on the upper end of the pilot seat (4), and one end of the second valve body (2) is arranged on the side wall of the coil assembly (3), the coil assembly (3) comprises a shell (6), a coil body (7), a support frame (8), a moving iron core assembly (9) and a static iron core assembly (10), the coil body (7), the support frame (8), the moving iron core assembly (9) and the static iron core assembly (10) are located in the shell (6), the coil body (7) is sleeved on the outer peripheral side of the support frame (8), the moving iron core assembly (9) and the static iron core assembly (10) are located in the support frame (8), and the moving iron core assembly (9) is located below the static iron core assembly (10), characterized in that: The movable iron core assembly (9) includes a movable iron core body (11) and a driving spring (12), an inlet and outlet (5) are provided in the pilot seat (4), a slide groove (14) is provided at the lower end of the movable iron core body (11), a spring assembly (18) is provided in the slide groove (14), a sealing block (16) is provided at the lower end of the slide groove (14), the sealing block (16) and the inlet and outlet (5) correspond to each other, and the lower end of the spring assembly (18) abuts against the side wall of the sealing block (16).
2. The explosion-proof solenoid valve according to claim 1, characterized in that: A limiting groove (15) is provided on the inner peripheral side of the lower end of the sliding groove (14), and the sealing block (16) is slidably inserted into the limiting groove (15).
3. The explosion-proof solenoid valve according to claim 1, characterized in that: The upper end of the slide groove (14) is through-opened, and a top block (17) is provided in the upper end of the slide groove (14), and the upper end of the spring assembly (18) abuts against the side wall of the top block (17).
4. The explosion-proof solenoid valve according to claim 1, characterized in that: The spring assembly (18) comprises a separator (19), a first spring (20) and a second spring (21), wherein the first spring (20) and the second spring (21) are located on the upper and lower sides of the separator (19).
5. The explosion-proof solenoid valve according to claim 1, characterized in that: The driving spring (12) is arranged in a conical shape, and the driving spring (12) is sleeved on the peripheral side of the moving iron core body (11). The lower end of the driving spring (12) abuts against the side wall of the moving iron core body (11), and the other end of the driving spring (12) abuts against the lower end of the support frame (8).
6. The explosion-proof solenoid valve according to claim 1, characterized in that: A manual switch (22) is rotatably connected to the side wall of the pilot seat (4), and an eccentric disk (23) is provided at the inner end of the manual switch (22), and the eccentric disk (23) corresponds to the moving iron core body (11).
7. The explosion-proof solenoid valve according to claim 6, characterized in that: A limit rod (25) is provided on the side wall of the manual switch (22), and an annular groove (24) for the limit rod (25) to slide is provided on the circumferential side of the manual switch (22), and the limit rod (25) is inserted and fixed in the side wall of the pilot seat (4).