Normally closed proportional electromagnetic valve

Abstract

According to the technical scheme, the normally-closed type proportional electromagnetic valve comprises a valve body and a valve element, a transmission box is installed on the outer surface of the valve body, the valve element is installed in the middle of the interior of the valve body, a spring groove is formed in the portion, located on the outer surface of the valve element, of the interior of the valve body, and moving rods are installed on the two sides of the valve body. An extrusion seat is mounted at one end of the moving rod and located in the spring groove, a spring is mounted on the outer surface of the valve element and located in the spring groove through a spring seat, a pressing plate is mounted on the outer surface of the valve element and located at the top of the spring, and a jacking seat is mounted on the top of the pressing plate and close to the outer surface. The normally-closed type proportional electromagnetic valve solves the problems that when the normally-closed type proportional electromagnetic valve is closed for a long time, the elastic force of a spring is reduced along with time increase, a valve element is prone to loosening, and the closing effect of the electromagnetic valve is affected, the elastic force of the spring is conveniently adjusted, and therefore the closing effect of the electromagnetic valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of normally closed proportional solenoid valves, in particular to a normally closed proportional solenoid valve. Background Art

[0002] Normally closed proportional solenoid valve is a normally closed solenoid valve. By controlling the current of the electromagnetic coil, the valve opening and flow rate can be adjusted. Normally closed proportional solenoid valve is widely used in industrial automation control systems and fluid control systems, such as liquid level control, temperature control, pressure control, flow rate regulation, etc. It can be used in conjunction with sensors, controllers, etc. to achieve precise fluid control and automatic control, and improve production efficiency and product quality.

[0003] When the existing normally closed proportional solenoid valve is closed for a long time, the elastic force of the spring decreases with time, and the valve core is easily loosened, affecting the closing effect of the solenoid valve. Therefore, we propose a normally closed proportional solenoid valve. Utility Model Content

[0004] The utility model aims to provide a normally closed proportional solenoid valve, which can maintain the spring force and solve the problem that when the existing normally closed proportional solenoid valve is closed for a long time, the spring force decreases with the increase of time, the valve core is easily loosened, and the closing effect of the solenoid valve is affected.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a normally closed proportional solenoid valve, comprising a valve body and a valve core, wherein a transmission box is installed on the outer surface of the valve body, a valve core is installed in the middle of the valve body, a spring groove is provided inside the valve body on the outer surface of the valve core, moving rods are installed on both sides of the valve body, one end of the moving rod is located inside the spring groove and an extrusion seat is installed, the outer surface of the valve core is located inside the spring groove and a spring is installed through the spring seat, a pressure plate is installed on the top of the spring on the outer surface of the valve core, a top pressure seat is installed on the top of the pressure plate near the outer surface, a moving block is installed on the end of the moving rod inside the transmission box, and a rotating shaft is installed inside the transmission box near the rear surface.

[0006] Preferably, the rotating shaft is sleeved inside the moving blocks on both sides, the rotating shaft is screwed and connected to the moving blocks on both sides through threads, and the threads on the outer surface of the rotating shaft are arranged in reverse.

[0007] Preferably, a worm wheel is installed on the outer surface of the rotating shaft, a regulator is installed on the front surface of the transmission box, a worm is installed at the end of the regulator at the bottom of the worm wheel, and the worm is meshed with the worm wheel.

[0008] Preferably, a top sleeve is installed on the top of the valve body, an electromagnetic controller is installed on the top of the top sleeve, and a positioning sleeve is installed on the outer surface of the top sleeve.

[0009] Preferably, the positioning sleeve is sleeved on the outer surface of the valve body, a disassembly groove is provided on the outer surface of the positioning sleeve, and a disassembly seat is installed on the outer surface of the valve body near the top.

[0010] Preferably, a positioning platform is installed at the top of the positioning sleeve, and a positioning groove is provided at the top of the top sleeve at the position of the positioning platform, and the positioning platform is clamped in the positioning groove.

[0011] Preferably, a rubber protective sleeve is provided on the outer surface of the valve body at the bottom of the positioning sleeve.

[0012] Preferably, a water inlet pipe is installed on one side of the outer surface of the valve body close to the bottom, and a drain pipe is installed on the side of the outer surface of the valve body away from the water inlet pipe.

[0013] Preferably, the upper surface of the pressure seat and the lower surface of the extrusion seat are both conical, and an inner groove is provided inside the valve body at the position of the extrusion seat.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model achieves the effect of maintaining the spring force by arranging a pressure plate, a top pressure seat, an extrusion seat, a moving block, a rotating shaft and an adjuster, so as to solve the problem that when the existing normally closed proportional solenoid valve is closed for a long time, the spring force decreases with the increase of time, the valve core is easily loosened, and the closing effect of the solenoid valve is affected. The spring force is conveniently adjusted, thereby ensuring the closing effect of the solenoid valve.

[0016] 2. The utility model achieves the effect of locking the rotating shaft by arranging a rotating shaft, a worm and a worm wheel, so as to solve the problem that the existing control valve is easily vibrated by the impact of the fluid during use, and the vibration easily causes the pressure plate to loosen, affecting the spring compression effect. The loosening probability of the pressure plate is reduced and the closing effect of the solenoid valve is ensured.

[0017] 3. The utility model achieves the effect of facilitating the disassembly and maintenance of the solenoid valve by providing a positioning sleeve and a top sleeve, so as to solve the problem that when the normally closed proportional solenoid valve is closed for a long time, the elastic force of the spring decreases with the increase of time, and it needs to be disassembled and maintained, while the existing solenoid valve is difficult to disassemble and assemble, thereby improving the maintenance efficiency of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0020] Figure 3 for Figure 2 The enlarged structural diagram of A;

[0021] Figure 4 for Figure 2 Schematic diagram of the enlarged structure of B.

[0022] Figure numerals: 1. valve body; 2. drain pipe; 3. regulator; 4. transmission box; 5. disassembly and assembly seat; 6. disassembly and assembly groove; 7. electromagnetic controller; 8. positioning sleeve; 9. rubber protective sleeve; 10. water inlet pipe; 11. valve core; 12. spring; 13. pressure plate; 14. top sleeve; 15. spring groove; 16. inner groove; 17. worm; 18. worm wheel; 19. moving block; 20. rotating shaft; 21. moving rod; 22. extrusion seat; 23. top pressure seat; 24. positioning platform; 25. positioning groove. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Embodiment 1

[0025] like Figure 1-3 As shown, in order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a normally closed proportional solenoid valve, comprising a valve body 1 and a valve core 11, a transmission box 4 is installed on the outer surface of the valve body 1, a valve core 11 is installed in the middle of the valve body 1, a spring groove 15 is provided on the outer surface of the valve core 11 inside the valve body 1, a moving rod 21 is installed on both sides of the valve body 1, one end of the moving rod 21 is located inside the spring groove 15 and an extrusion seat 22 is installed, the outer surface of the valve core 11 is located inside the spring groove 15 and a spring 12 is installed through the spring 12 seat, a pressure plate 13 is installed on the outer surface of the valve core 11 at the top of the spring 12, a top pressure seat 23 is installed on the top of the pressure plate 13 near the outer surface, the end of the moving rod 21 is located inside the transmission box 4 and a moving block 19 is installed, and the transmission box 4 is inside A rotating shaft 20 is installed near the rear surface of the valve body 1, and the rotating shaft 20 is sleeved inside the moving blocks 19 on both sides. The moving blocks 19 on both sides are driven to move by the rotating shaft 20. The rotating shaft 20 is screwed together with the moving blocks 19 on both sides through threads. The threads on the outer surface of the rotating shaft 20 are set in reverse. A worm gear 18 is installed on the outer surface of the rotating shaft 20, and a regulator 3 is installed on the front surface of the transmission box 4. A worm 17 is installed at the end of the regulator 3 at the bottom of the worm gear 18, and the worm 17 is meshed with the worm gear 18. An inlet pipe 10 is installed near the bottom on one side of the outer surface of the valve body 1, and a drain pipe 2 is installed on the side of the outer surface of the valve body 1 away from the inlet pipe 10. The upper surface of the top pressure seat 23 and the lower surface of the extrusion seat 22 are both conically set, and an inner groove 16 is provided at the position of the extrusion seat 22 inside the valve body 1.

[0026] The working principle of a normally closed proportional solenoid valve based on Example 1 is as follows: after the utility model is installed, when it is used, the valve core 11 is squeezed by the elastic force of the spring 12, thereby driving the valve core 11 to block the water inlet pipe 10 and the drain pipe 2, thereby blocking the fluid. When it is necessary to transport the fluid, the valve core 11 is adsorbed by the electromagnetic controller 7, thereby driving the valve core 11 to move upward, connecting the water inlet pipe 10 and the drain pipe 2, thereby transporting the fluid. When it is necessary to increase the elastic force of the spring 12, the regulator 3 is rotated, and the worm 17 is driven to rotate by the regulator 3, and the worm gear 18 is driven to rotate by the worm 17, and the rotating shaft 20 is driven to rotate by the worm gear 18, and the moving block 19 is driven to move by the rotating shaft 20, and the extrusion seat 22 is driven to move sideways by the moving block 19, and the pressure plate 13 is driven downward by the extrusion seat 22, thereby increasing the elastic force of the spring 12 to ensure the normally closed effect of the valve body 1. At this point, the working process of the device is completed.

[0027] Embodiment 2

[0028] like Figure 3 and Figure 4 As shown, a normally closed proportional solenoid valve proposed by the utility model, compared with the first embodiment, this embodiment also includes: a top sleeve 14 is installed on the top of the valve body 1, an electromagnetic controller 7 is installed on the top of the top sleeve 14, a positioning sleeve 8 is installed on the outer surface of the top sleeve 14, the positioning sleeve 8 is sleeved on the outer surface of the valve body 1, a disassembly and assembly groove 6 is provided on the outer surface of the positioning sleeve 8, a disassembly and assembly seat 5 is installed on the outer surface of the valve body 1 near the top, and the positioning sleeve 8 and the valve body 1 are conveniently separated by the provided disassembly and assembly groove 6 and the disassembly and assembly seat 5, a positioning platform 24 is installed on the top of the positioning sleeve 8, a positioning groove 25 is provided on the top of the top sleeve 14 at the position of the positioning platform 24, and the positioning platform 24 is clamped in the positioning groove 25, and a rubber protective sleeve 9 is provided on the outer surface of the valve body 1 at the bottom of the positioning sleeve 8, and the connection is sealed by the provided rubber protective sleeve 9.

[0029] In this embodiment, when the spring 12 needs to be replaced, the rubber protective sleeve 9 is pulled down, and then the positioning sleeve 8 is removed through the disassembly groove 6 and the disassembly seat 5 using a tool, and then the top sleeve 14 is pulled up to separate the top sleeve 14 from the valve body 1. At the same time, the rotating shaft 20 is driven to rotate through the regulator 3, so that the extrusion seat 22 is moved to the inside of the inner groove 16, and the restriction on the pressure plate 13 is released. The pressure plate 13 and the spring 12 can be taken out and the spring 12 can be replaced.

[0030] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A normally closed proportional solenoid valve, comprising a valve body (1) and a valve core (11), characterized in that: A transmission box (4) is installed on the outer surface of the valve body (1), a valve core (11) is installed in the middle of the valve body (1), a spring groove (15) is provided inside the valve body (1) and located on the outer surface of the valve core (11), a moving rod (21) is installed on both sides of the valve body (1), one end of the moving rod (21) is located inside the spring groove (15) and is installed with an extrusion seat (22), the outer surface of the valve core (11) is located inside the spring groove (15) and is installed with a spring (12) through the spring seat, a pressure plate (13) is installed on the outer surface of the valve core (11) and located on the top of the spring (12), a top pressure seat (23) is installed on the top of the pressure plate (13) near the outer surface, the end of the moving rod (21) is located inside the transmission box (4) and is installed with a moving block (19), and a rotating shaft (20) is installed inside the transmission box (4) near the rear surface.

2. A normally closed proportional solenoid valve according to claim 1, characterized in that: The rotating shaft (20) is sleeved inside the moving blocks (19) on both sides. The rotating shaft (20) and the moving blocks (19) on both sides are screwed together via threads. The threads on the outer surface of the rotating shaft (20) are arranged in opposite directions.

3. A normally closed proportional solenoid valve according to claim 2, characterized in that: A worm wheel (18) is mounted on the outer surface of the rotating shaft (20), a regulator (3) is mounted on the front surface of the transmission box (4), a worm (17) is mounted at the end of the regulator (3) at the bottom of the worm wheel (18), and the worm (17) is meshed with the worm wheel (18).

4. A normally closed proportional solenoid valve according to claim 1, characterized in that: A top sleeve (14) is installed on the top of the valve body (1), an electromagnetic controller (7) is installed on the top of the top sleeve (14), and a positioning sleeve (8) is installed on the outer surface of the top sleeve (14).

5. A normally closed proportional solenoid valve according to claim 4, characterized in that: The positioning sleeve (8) is sleeved on the outer surface of the valve body (1), the outer surface of the positioning sleeve (8) is provided with a disassembly groove (6), and the outer surface of the valve body (1) is provided with a disassembly seat (5) near the top.

6. A normally closed proportional solenoid valve according to claim 4, characterized in that: A positioning platform (24) is installed at the top of the positioning sleeve (8), and a positioning groove (25) is provided at the top of the top sleeve (14) at the position of the positioning platform (24), and the positioning platform (24) is clamped inside the positioning groove (25).

7. A normally closed proportional solenoid valve according to claim 1, characterized in that: The outer surface of the valve body (1) is provided with a rubber protective sleeve (9) at the bottom of the positioning sleeve (8).

8. A normally closed proportional solenoid valve according to claim 1, characterized in that: A water inlet pipe (10) is installed on one side of the outer surface of the valve body (1) close to the bottom, and a drain pipe (2) is installed on the side of the outer surface of the valve body (1) facing away from the water inlet pipe (10).

9. A normally closed proportional solenoid valve according to claim 1, characterized in that: The upper surface of the pressing seat (23) and the lower surface of the extrusion seat (22) are both arranged in a conical shape, and an inner groove (16) is arranged inside the valve body (1) at the position of the extrusion seat (22).

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