A high stability proportional solenoid valve

Abstract

The present invention discloses a high-stability proportional solenoid valve, comprising a valve body, a magnetic isolation tube assembly and a coil arranged on the top of the valve body, the coil being sleeved on the surface of the magnetic isolation tube assembly, a movable iron core assembly being arranged on the inner side of the magnetic isolation tube assembly, a socket corresponding to the size of the bottom end of the magnetic isolation tube assembly being opened on the top surface of the valve body, the bottom end of the magnetic isolation tube assembly being inserted into the socket, and a spring and an adjusting screw being arranged on the inner side of the magnetic isolation tube assembly; by arranging an upper stainless steel spring sheet and a lower stainless steel spring sheet, and the lower stainless steel spring sheet adopts a double-piece superimposed spring sheet structure, the elastic force of the stainless steel spring sheet is increased, and deformation phenomenon is reduced, so that the stability performance of the iron core is greatly improved in the process of moving up and down, and the stability of the flow is greatly improved, the retaining ring design for positioning and the integrated magnetic isolation tube design have higher coaxiality, resulting in improved accuracy and better flow controllability.

Description

Technical Field

[0001] The invention belongs to the technical field of proportional solenoid valves, and in particular relates to a high-stability proportional solenoid valve. Background Art

[0002] The working principle of the proportional solenoid valve is usually designed: the proportional relationship is formed between the electromagnetic coil and the iron core spring. When the voltage (current) increases or decreases, the coil power changes accordingly, overcoming the spring force, thus forming a proportional relationship. However, the proportional solenoid valve has to solve the problem of the core jumping, which causes the flow jump and the position consistency of each action and the fixity of the flow.

[0003] When the existing proportional solenoid valve is in use, only one spring and a movable iron core are used, and the jumping will be more obvious. Especially when the movable iron core is close to the suction surface, since the suction distance is too small, the movable iron core will be pulled up quickly, causing the flow rate to increase rapidly, thereby reducing the overall stability of use and causing the flow rate stability to decrease. For this reason, the present invention proposes a high-stability proportional solenoid valve. Summary of the invention

[0004] The object of the present invention is to provide a high-stability proportional solenoid valve to solve the problem that the existing proportional solenoid valve proposed in the above background technology only uses one spring and a movable iron core and the vibration will be more obvious when in use, especially when the movable iron core is close to the suction surface. Since the suction distance is too small, the movable iron core will be quickly pulled up, causing the flow rate to increase rapidly, thereby reducing the overall stability of use and causing the flow rate stability to decrease.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-stability proportional solenoid valve, comprising a valve body and a magnetic isolation tube assembly and a coil arranged on the top of the valve body, the coil being sleeved on the surface of the magnetic isolation tube assembly, a movable iron core assembly being arranged on the inner side of the magnetic isolation tube assembly, a socket corresponding to the size of the bottom end of the magnetic isolation tube assembly being opened on the top surface of the valve body, the bottom end of the magnetic isolation tube assembly being inserted into the socket, a spring and an adjusting screw being arranged on the inner side of the magnetic isolation tube assembly, and the top end of the spring being sleeved on the bottom end surface of the adjusting screw, an insert being installed on the top end surface of the magnetic isolation tube assembly relative to the top of the coil, a pressure plate being installed on the bottom end surface of the magnetic isolation tube assembly relative to the top of the valve body, the magnetic isolation tube assembly comprising a fixed iron core, an upper stainless steel pipe, and a lower stainless steel pipe. Steel spring pieces and magnetic isolation tubes, the bottom end of the fixed iron core is inserted into the inner side of the magnetic isolation tube, and the upper stainless steel spring piece is at the inner bottom end of the fixed iron core, the movable iron core assembly includes a spring support, a movable iron core, a lower stainless steel spring piece, a sealing plate, a seal and a sealing gasket, the spring support and the sealing plate are respectively arranged at the two ends of the movable iron core, the bottom end of the spring support is inserted into the inner side of the movable iron core, the sealing plate is sleeved on the bottom end surface of the movable iron core, the seal and the sealing gasket are both arranged on the inner side of the sealing plate, the seal is fixed to the inner side of the sealing plate through the sealing gasket, the two lower stainless steel spring pieces are both sleeved on the bottom end surface of the movable iron core, and the two lower stainless steel spring pieces are at the top of the sealing plate.

[0006] Preferably, a positioning hole corresponding to the size of the top end of the spring pillar is opened at the center of the upper stainless steel spring sheet, and the top end of the spring pillar passes through the top of the upper stainless steel spring sheet, the bottom end of the spring is sleeved on the top surface of the spring pillar, and the bottom end of the fixed iron core is opened with a groove corresponding to the size of the top end of the movable iron core.

[0007] Preferably, a corrugated gasket is provided between the coil and the pressing plate, and the corrugated gasket is sleeved on the surface of the magnetic isolation tube.

[0008] Preferably, both end surfaces of the movable iron core are provided with annular mounting grooves, and guide rings are installed in the two annular mounting grooves.

[0009] Preferably, a second annular groove is formed at the top of the adjusting screw, and a second O-ring is installed in the second annular groove, and the second O-ring is tightly fitted to the inner wall of the top of the fixed iron core.

[0010] Preferably, a first annular groove is provided on the bottom surface of the magnetic isolation tube, and a first O-ring is installed in the first annular groove, the first O-ring fits tightly with the inner wall of the socket, and a retaining ring is provided on the inner side of the bottom end of the magnetic isolation tube, and the retaining ring is at the bottom of the lower stainless steel spring sheet.

[0011] Preferably, a water inlet and a water outlet are respectively provided on both side surfaces of the valve body, and a main valve port communicating with the socket is provided at the bottom end of the water inlet, and a channel communicating with the socket is provided at the bottom end of the water outlet.

[0012] Compared with the prior art, the beneficial effects of the present invention are: by setting up the upper stainless steel spring sheet and the lower stainless steel spring sheet, and the lower stainless steel spring sheet adopts a double-piece superimposed spring sheet structure, the elastic force of the stainless steel spring sheet is increased, and the deformation phenomenon is reduced, so that the stability performance of the iron core in the process of moving up and down is greatly improved, and the stability of the flow is greatly improved. The retaining ring design and the integrated magnetic isolation tube design used for positioning have higher coaxiality, resulting in improved accuracy and better flow controllability. The upper stainless steel spring sheet on the fixed iron core limits the left and right swing of the movable iron core and balances the force of the movable iron core during the upward movement. The two guide rings installed on the surface of the movable iron core control the friction generated by the iron core jumping and the up and down movement of the iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 It is a structural schematic diagram of the magnetic isolation tube assembly of the present invention;

[0015] Figure 3 It is a structural schematic diagram of the movable iron core assembly of the present invention;

[0016] In the figure: 1. valve body; 2. first O-ring; 3. retaining ring; 4. corrugated pad; 5. coil; 6. spring; 7. magnetic isolation tube assembly; 8. adjusting screw; 9. second O-ring; 10. insert; 11. movable iron core assembly; 12. pressure plate; 13. fixed iron core; 14. upper stainless steel spring; 15. magnetic isolation tube; 16. spring support; 17. movable iron core; 18. lower stainless steel spring; 19. sealing buckle plate; 20. sealing; 21. sealing gasket; 22. guide ring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example

[0019] See also Figures 1 to 3The present invention provides a technical solution: a high-stability proportional solenoid valve, comprising a valve body 1 and a magnetic isolation tube assembly 7 and a coil 5 arranged on the top of the valve body 1, the coil 5 is sleeved on the surface of the magnetic isolation tube assembly 7, a movable iron core assembly 11 is arranged on the inner side of the magnetic isolation tube assembly 7, a socket corresponding to the size of the bottom end of the magnetic isolation tube assembly 7 is opened on the top surface of the valve body 1, the bottom end of the magnetic isolation tube assembly 7 is inserted into the socket, a spring 6 and an adjusting screw 8 are arranged on the inner side of the magnetic isolation tube assembly 7, and the top end of the spring 6 is sleeved on the bottom end surface of the adjusting screw 8, and the spring 6 is made of stainless steel. The magnetic isolation tube assembly 7 is a steel material component. The top surface of the magnetic isolation tube assembly 7 is installed with an insert 10 relative to the top of the coil 5. The bottom surface of the magnetic isolation tube assembly 7 is installed with a pressure plate 12 relative to the top of the valve body 1. The magnetic isolation tube assembly 7 includes a fixed iron core 13, an upper stainless steel spring 14 and a magnetic isolation tube 15. The fixed iron core 13 is made of a soft magnetic alloy material component. The bottom end of the fixed iron core 13 is inserted into the inner side of the magnetic isolation tube 15. The magnetic isolation tube 15 adopts an integrated design to ensure the coaxiality of the large and small holes, and to ensure that the outer ring of the lower stainless steel spring 18 is more coaxial with the movable iron core 17, so as to ensure the quality. The movable core assembly 11 includes a spring support 16, a movable core 17, a lower stainless steel spring 18, a sealing plate 19, a seal 20 and a sealing gasket 21. The movable core 17 is made of a soft magnetic alloy material, and the spring support 16 is made of a stainless steel material. The spring support 16 and the sealing plate 19 are respectively arranged at both ends of the movable core 17. The bottom end of the spring support 16 is inserted into the inner side of the movable core 17. The sealing plate 19 is sleeved on the movable core 17. On the bottom surface of the iron core 17, the seal 20 and the sealing gasket 21 are both arranged on the inner side of the sealing buckle plate 19, and the seal 20 is fixed to the inner side of the sealing buckle plate 19 through the sealing gasket 21. The two lower stainless steel springs 18 are both sleeved on the bottom surface of the movable iron core 17, and the two lower stainless steel springs 18 are at the top of the sealing buckle plate 19. The double-piece superimposed spring structure increases the elastic force of the stainless steel spring and reduces deformation, so that the stability of the movable iron core 17 is greatly improved during the upward and downward movement, and the stability of the flow is greatly improved.

[0020] In this embodiment, preferably, a positioning hole corresponding to the size of the top end of the spring support 16 is opened at the center of the upper stainless steel spring sheet 14, and the top end of the spring support 16 passes through the top of the upper stainless steel spring sheet 14, and the bottom end of the spring 6 is sleeved on the top surface of the spring support 16, which can reduce the left and right jumping of the movable iron core 17, reduce noise, and protect the left and right jumping of the spring 6, and also play a good balancing role. The bottom end of the fixed iron core 13 is provided with a groove corresponding to the size of the top end of the movable iron core 17.

[0021] In this embodiment, preferably, a corrugated pad 4 is provided between the coil 5 and the pressing plate 12 , and the corrugated pad 4 is sleeved on the surface of the magnetic isolation tube 15 .

[0022] In this embodiment, preferably, annular mounting grooves are provided on the surfaces of both ends of the movable iron core 17, and guide rings 22 are installed in the two annular mounting grooves. The guide rings 22 are made of polytetrafluoroethylene material. The guide rings 22 are intended to reduce the friction between the movable iron core 17 and the magnetic isolation tube 15, as well as the noise generated by the resonance between the movable iron core 17 and the magnetic isolation tube 15 under pressure.

[0023] In this embodiment, preferably, a second annular groove is formed at the top of the adjusting screw 8, and a second O-ring 9 is installed in the second annular groove. The second O-ring 9 is tightly fitted to the inner wall of the top of the fixed core 13 to play a sealing role.

[0024] In this embodiment, preferably, a first annular groove is opened on the bottom surface of the magnetic isolation tube 15, and a first O-ring 2 is installed in the first annular groove. The first O-ring 2 fits tightly against the inner wall of the socket to play a sealing role. A retaining ring 3 is arranged on the inner side of the bottom end of the magnetic isolation tube 15, and the retaining ring 3 is at the bottom of the lower stainless steel spring piece 18 to support the up and down movement and positioning of the lower stainless steel spring piece 18.

[0025] In this embodiment, preferably, a water inlet and a water outlet are respectively provided on both side surfaces of the valve body 1, and a main valve port communicating with the socket is provided at the bottom end of the water inlet, the sealing member 20 is located directly above the main valve port, and a channel communicating with the socket is provided at the bottom end of the water outlet.

[0026] Working principle and use process of the present invention: When assembling the high-stability proportional solenoid valve, the sealing plate 19, the lower stainless steel spring sheet 18, the spring support 16 and the movable iron core 17 are first formed into a certain size by a stamping machine, and the sealing gasket 21 is used to weld the sealing member 20 and the sealing plate 19 together, and then the guide rings 22 are respectively installed at both ends of the movable iron core 17 to form a movable iron core assembly 11, and then the fixed iron core 13, the magnetic isolation tube 15 and the upper stainless steel spring sheet 14 are welded together. After the magnetic isolation tube assembly 7 and the movable iron core assembly 11 are assembled, the spring 6 and the adjusting screw 8 are placed in the upper end of the fixed iron core 13 in sequence, and the second O-ring 9 for sealing is installed on the top of the adjusting screw 8. Then, the first O-ring 2 for sealing is installed on the bottom end of the magnetic isolation tube 15. Then, the movable iron core assembly 11 and the retaining ring 3 are placed in the magnetic isolation tube assembly 7 in sequence, so that the sealing plate 19 can be located on the inner side of the retaining ring 3, and the bottom end of the magnetic isolation tube assembly 7 is placed. 1 and 14. The worm gear 11 is inserted into the socket on the top of the valve body 1 and fixed by screws and a pressure plate 12. Finally, the corrugated pad 4 and the coil 5 are sequentially sleeved on the magnetic isolation tube 15 and fixed by an insert 10 so that the coil 5 can rotate in any direction, thereby completing the assembly of the proportional solenoid valve. When the high-stability proportional solenoid valve is in use, it is similar to the working principle of the existing two-way solenoid valve. When the coil 5 is not energized, the movable iron core 17 cannot move and is closed with the valve port inside the valve body 1, so that the medium passing into the water inlet of the valve body 1 cannot pass through. When the coil 5 is energized, the movable iron core 17 is attracted upward, the valve port is opened, and the medium passing into the water inlet flows to the water outlet. Under the action of the lower stainless steel spring sheet 18 and the upper stainless steel spring sheet 14, the lower stainless steel spring sheet 18 adopts a double-piece superimposed spring sheet structure, which increases the elastic force of the lower stainless steel spring sheet 18 and reduces deformation, and can produce a balance with the electromagnetic force, so that the movable iron core 17 is greatly improved in the process of moving up and down, and the stability of the flow is greatly improved, thereby achieving precise control of the medium flow.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-stability proportional solenoid valve, comprising a valve body (1) and a magnetic isolation tube assembly (7) and a coil (5) arranged on the top of the valve body (1), wherein the coil (5) is sleeved on the surface of the magnetic isolation tube assembly (7), a movable iron core assembly (11) is arranged on the inner side of the magnetic isolation tube assembly (7), a socket corresponding to the size of the bottom end of the magnetic isolation tube assembly (7) is opened on the top surface of the valve body (1), the bottom end of the magnetic isolation tube assembly (7) is inserted into the socket, a spring (6) and an adjusting screw (8) are arranged on the inner side of the magnetic isolation tube assembly (7), and the top end of the spring (6) is sleeved on the bottom end surface of the adjusting screw (8), an insert (10) is installed on the top end surface of the magnetic isolation tube assembly (7) relative to the top of the coil (5), and a pressure plate (12) is installed on the bottom end surface of the magnetic isolation tube assembly (7) relative to the top of the valve body (1), characterized in that: The magnetic isolation tube assembly (7) comprises a fixed iron core (13), an upper stainless steel spring sheet (14) and a magnetic isolation tube (15), wherein the bottom end of the fixed iron core (13) is inserted into the inner side of the magnetic isolation tube (15), and the upper stainless steel spring sheet (14) is located at the inner bottom end of the fixed iron core (13), and the movable iron core assembly (11) comprises a spring support (16), a movable iron core (17), a lower stainless steel spring sheet (18), a sealing plate (19), a sealing member (20) and a sealing gasket (21), wherein the spring support (16) and the sealing plate (19) are respectively arranged on the movable iron core ( 17), the bottom end of the spring support (16) is inserted into the inner side of the movable iron core (17), the sealing plate (19) is sleeved on the bottom end surface of the movable iron core (17), the sealing member (20) and the sealing gasket (21) are both arranged on the inner side of the sealing plate (19), the sealing member (20) is fixed to the inner side of the sealing plate (19) through the sealing gasket (21), the two lower stainless steel spring sheets (18) are both sleeved on the bottom end surface of the movable iron core (17), and the two lower stainless steel spring sheets (18) are at the top of the sealing plate (19).

2. A high stability proportional solenoid valve according to claim 1, characterized in that: A positioning hole corresponding to the size of the top end of the spring support (16) is provided at the center of the upper stainless steel spring sheet (14), and the top end of the spring support (16) penetrates to the top of the upper stainless steel spring sheet (14), the bottom end of the spring (6) is sleeved on the top surface of the spring support (16), and the bottom end of the fixed iron core (13) is provided with a groove corresponding to the size of the top end of the movable iron core (17).

3. A high stability proportional solenoid valve according to claim 1, characterized in that: A corrugated pad (4) is provided between the coil (5) and the pressing plate (12), and the corrugated pad (4) is sleeved on the surface of the magnetic isolation tube (15).

4. A high stability proportional solenoid valve according to claim 1, characterized in that: Annular mounting grooves are provided on both end surfaces of the movable iron core (17), and guide rings (22) are installed in the two annular mounting grooves.

5. A high stability proportional solenoid valve according to claim 1, characterized in that: A second annular groove is formed at the top of the adjusting screw (8), and a second O-ring (9) is installed in the second annular groove. The second O-ring (9) is tightly fitted to the inner wall of the top of the fixed iron core (13).

6. A high stability proportional solenoid valve according to claim 1, characterized in that: A first annular groove is provided on the bottom surface of the magnetic isolation tube (15), and a first O-ring (2) is installed in the first annular groove. The first O-ring (2) is tightly fitted with the inner wall of the socket. A retaining ring (3) is provided on the inner side of the bottom end of the magnetic isolation tube (15), and the retaining ring (3) is located at the bottom of the lower stainless steel spring sheet (18).

7. A high stability proportional solenoid valve according to claim 1, characterized in that: The two side surfaces of the valve body (1) are respectively provided with a water inlet and a water outlet, and the bottom end of the water inlet is provided with a main valve port communicating with the socket, and the bottom end of the water outlet is provided with a channel communicating with the socket.

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