Electromagnetic valve with double-spring structure

Abstract

The utility model relates to the technical field of electromagnetic valve equipment, in particular to an electromagnetic valve with a double-spring structure, which comprises a valve sleeve, a valve core arranged in the middle of the valve sleeve, a reversing module arranged on the lower portion of the valve sleeve and used for controlling the oil outlet direction, and a driving module arranged on the upper portion of the valve sleeve and used for driving the valve core to move longitudinally. The driving module comprises a sealing seat connected with the valve sleeve, a coil assembly is arranged on the upper portion of the sealing seat, an armature connected with the valve element is arranged in the coil assembly, a first spring is arranged on the upper portion of the valve element, a second spring is arranged on the lower portion of the valve element, and it is guaranteed that the electromagnetic valve is in the micro-flow state in the power-off state through cooperation of the first spring and the second spring.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valve equipment, in particular to a electromagnetic valve with a double-spring structure. Background Art

[0002] Normally low-pressure hydraulic proportional valves can linearly adjust the pressure of the fluid at the oil outlet (control port) by adjusting the operating current of the electromagnet and changing the magnetic force acting on the armature assembly, thereby controlling the valve opening. They are widely used in applications that require precise control of hydraulic oil flow, such as transmissions. Currently, most hydraulic flow proportional valves control flow by balancing the electromagnetic force of the electromagnet with the force of a single spring, thereby controlling the opening area of the valve core end (usually with a conical or flat bottom). This control method is simple in principle, but the valve core end is fully open or closed in normal conditions (no power), making it unsuitable for scenarios where micro-flow is required under normal conditions. Utility Model Content

[0003] In order to solve the above problems, an embodiment of the present utility model provides a solenoid valve with a double spring structure, which can put the solenoid valve into a micro-flow state when the power is off.

[0004] In order to achieve the above-mentioned objectives, the embodiment of the present invention specifically adopts the following technical solutions: a solenoid valve with a double spring structure, comprising a valve sleeve, a valve core is provided in the middle of the valve sleeve, a reversing module for controlling the oil outlet direction is provided at the lower part of the valve sleeve, a driving module for driving the valve core to move longitudinally is provided at the upper part of the valve sleeve, the driving module comprises a sealing seat connected to the valve sleeve, a coil group is provided at the upper part of the sealing seat, an armature connected to the valve core is provided in the coil group, a spring 1 is provided at the upper part of the valve core, and a spring 2 is provided at the lower part, the reversing module comprises a reversing block connected to the valve sleeve, the reversing block is provided with an oil inlet, a control port and an oil unloading port in sequence from bottom to top, a first sealing body for opening and closing the oil inlet is provided at the lower part of the valve core, and a second sealing body for opening and closing the oil unloading port is provided at the middle part.

[0005] As a further improvement of the above technical solution:

[0006] The upper part of the valve core is provided with a driving sleeve located in the armature, the upper end of the driving sleeve is provided with a cavity for installing the spring 1, and the upper part of the cavity is provided with a plug abutting against the upper end of the spring 1.

[0007] A spring seat for mounting a second spring is provided in the middle of the sealing seat.

[0008] An oil inlet channel communicating with the oil inlet is provided at the lower portion of the reversing block, and an opening and closing hole used in conjunction with the first sealing body is provided at the end of the oil inlet channel.

[0009] The first sealing body is spherical and has a diameter larger than the diameter of the opening and closing hole.

[0010] A sealing plate coaxially distributed with the second sealing body is provided on the upper portion of the reversing block, and a through hole is provided in the middle portion of the sealing plate.

[0011] The second sealing body includes a connecting portion and a sealing portion. The diameter of the sealing portion gradually decreases from top to bottom and is distributed in a frustum shape.

[0012] The beneficial effects of the embodiments of the utility model are as follows: 1. The solenoid valve with a double-spring structure includes a valve sleeve, a valve core is provided in the middle of the valve sleeve, a reversing module for controlling the oil outlet direction is provided at the lower part of the valve sleeve, a driving module for driving the valve core to move longitudinally is provided at the upper part of the valve sleeve, the driving module includes a sealing seat connected to the valve sleeve, a coil group is provided at the upper part of the sealing seat, an armature connected to the valve core is provided in the coil group, a spring 1 is provided at the upper part of the valve core, and a spring 2 is provided at the lower part, and the cooperation of the spring 1 and the spring 2 ensures that the solenoid valve is in a micro-flow state when the power is off.

[0013] 2. The longitudinal movement of the valve core can change the opening and closing states of the oil inlet, control port and oil unloading port, thereby meeting the flow rate of each oil outlet under different requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the valve core in the utility model.

[0017] In the figure: 1. Valve sleeve; 2. Valve core; 3. Armature; 4. Spring 1; 5. Spring 2; 6. Reversing block; 7. Oil inlet; 8. Control port; 9. Oil unloading port; 10. First sealing body; 11. Second sealing body; 12. Drive sleeve; 13. Cavity; 14. Plug; 15. Sealing seat; 16. Spring seat; 17. Oil inlet channel; 18. Opening and closing hole; 19. Sealing plate; 20. Through hole; 21. Connecting part; 22. Sealing part. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0019] like Figure 1-3As shown, the solenoid valve with a double spring structure of this embodiment includes a valve sleeve 1, a valve core 2 is provided in the middle of the valve sleeve 1, a reversing module for controlling the oil outlet direction is provided at the lower part of the valve sleeve 1, a driving module for driving the valve core 2 to move longitudinally is provided at the upper part of the valve sleeve 1, and the position of the valve core can be changed by turning on and off the power of the driving module, thereby controlling the inlet and outlet direction of the oil, the driving module includes a sealing seat 15 connected to the valve sleeve 1, a coil group is provided at the upper part of the sealing seat 15, an armature 3 connected to the valve core 2 is provided in the coil group, a spring 1 4 is provided at the upper part of the valve core 2, a spring 2 5 is provided at the lower part, and a spring 4 is provided at the lower part. A downward thrust is applied to the valve core 2, and spring 2 5 applies an upward thrust to the valve core 2. The design of spring 1 4 and spring 2 5 can keep the entire solenoid valve in a normally low state in the initial state. The reversing module includes a reversing block 6 connected to the valve sleeve 1. The reversing block 6 is provided with an oil inlet 7, a control port 8 and an oil unloading port 9 from bottom to top. The lower part of the valve core 2 is provided with a first sealing body 10 for opening and closing the oil inlet 7, and the middle part is provided with a second sealing body 11 for opening and closing the oil unloading port 9. The pressure change at the oil inlet 7 can be changed by moving the valve core 2, thereby controlling the opening of the control port 8 and the oil drain port 9.

[0020] The upper part of the valve core 2 is provided with a drive sleeve 12 inserted in the armature 3, and the upper end of the drive sleeve 12 is provided with a cavity 13 for installing the spring 14. The upper part of the cavity 13 is provided with a plug 14 that abuts against the upper end of the spring 14.

[0021] A spring seat 16 for mounting the spring 2 5 is provided in the middle of the sealing seat 15 . The lower end of the spring 2 5 abuts against the spring seat 16 , and the upper end abuts against the drive sleeve 12 , providing an upward thrust for the valve core 2 .

[0022] An oil inlet passage 17 communicating with the oil inlet 7 is provided at the lower portion of the reversing block 6 , and an opening and closing hole 18 cooperating with the first sealing body 10 is provided at the end of the oil inlet passage 17 .

[0023] The first sealing body 10 is spherical and has a diameter greater than the diameter of the opening and closing hole 18 . When the first sealing body 10 moves into the opening and closing hole 18 , the oil inlet 7 is closed.

[0024] A sealing plate 19 coaxially distributed with the second sealing body 11 is provided on the upper portion of the reversing block 6 , and a through hole 20 is provided in the middle portion of the sealing plate 19 .

[0025] The second sealing body 11 includes a connecting portion 21 and a sealing portion 22. The connecting portion 21 is cylindrical and connected to the valve core 2. The sealing portion 22 is located below the connecting portion 21 and is integrally formed with the connecting portion 21. The diameter of the sealing portion 22 gradually decreases from top to bottom and is distributed in a frustum shape. When the sealing portion 22 moves longitudinally with the valve core 2, the opening of the through hole 20 changes.

[0026] The working principle of this solution is as follows: in the initial state, when the entire solenoid valve is not energized, the valve core 2 is under the action of spring 1 4 and spring 2 5, and the first sealing body 10 and the opening and closing hole 18 are in a slightly open state. At this time, the second sealing body 11 is separated from the through hole 20, and the oil unloading port 9 is connected to the control port 8. When the solenoid valve is energized, the valve core 2 moves downward due to the force of spring 2 5, the first sealing body 10 gradually moves away from the opening and closing hole 18, the opening of the oil inlet 7 gradually increases, and the synchronized sealing part 22 gradually approaches the through hole 20. When the valve core 2 moves down to the lowest end, the oil inlet 7 is fully opened, the through hole 20 is completely sealed, the oil unloading port 9 is completely sealed, and the flow at the control port 8 reaches the maximum.

[0027] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, article, or apparatus / device.

[0030] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A solenoid valve with a double spring structure, characterized in that: The valve sleeve (1) comprises a valve core (2) provided in the middle of the valve sleeve (1), a reversing module for controlling the oil outlet direction provided in the lower part of the valve sleeve (1), and a driving module for driving the valve core (2) to move longitudinally provided in the upper part of the valve sleeve (1); The driving module comprises a sealing seat (15) connected to the valve sleeve (1), a coil group is provided on the upper part of the sealing seat (15), an armature (3) connected to the valve core (2) is provided in the coil group, a spring 1 (4) is provided on the upper part of the valve core (2), and a spring 2 (5) is provided on the lower part; The reversing module comprises a reversing block (6) connected to the valve sleeve (1); the reversing block (6) is provided with an oil inlet (7), a control port (8) and an oil discharge port (9) in sequence from bottom to top; a first sealing body (10) for opening and closing the oil inlet (7) is provided at the lower part of the valve core (2); and a second sealing body (11) for opening and closing the oil discharge port (9) is provided at the middle part.

2. The solenoid valve with a double spring structure according to claim 1, characterized in that: The upper portion of the valve core (2) is provided with a drive sleeve (12) located in the armature (3), the upper end of the drive sleeve (12) is provided with a cavity (13) for installing a spring (4), and the upper portion of the cavity (13) is provided with a plug (14) that abuts against the upper end of the spring (4).

3. The solenoid valve with a double spring structure according to claim 1, characterized in that: A spring seat (16) for mounting the second spring (5) is provided in the middle of the sealing seat (15).

4. The solenoid valve with a double spring structure according to claim 1, characterized in that: An oil inlet channel (17) communicating with the oil inlet (7) is provided at the lower portion of the reversing block (6), and an opening and closing hole (18) used in conjunction with the first sealing body (10) is provided at the end of the oil inlet channel (17).

5. The solenoid valve with a double spring structure according to claim 4, characterized in that: The first sealing body (10) is spherical and has a diameter greater than the diameter of the opening and closing hole (18).

6. The solenoid valve with a double spring structure according to claim 1, characterized in that: A sealing plate (19) coaxially distributed with the second sealing body (11) is provided on the upper portion of the reversing block (6), and a through hole (20) is provided in the middle portion of the sealing plate (19).

7. The solenoid valve with a double spring structure according to claim 6, characterized in that: The second sealing body (11) comprises a connecting portion (21) and a sealing portion (22), and the diameter of the sealing portion (22) gradually decreases from top to bottom and is distributed in a frustum shape.

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