Reverse electro-hydraulic proportional brake valve

Abstract

The invention relates to a reverse electro-hydraulic proportional brake valve, in particular to the technical field of hydraulic and pneumatic transmission control. The brake valve comprises a valve body, a movable valve rod, an electromagnetic pushing device for driving the valve rod to move and a pressure regulating device for regulating the pressure in the valve body. The pressure adjusting device is connected with the valve rod and comprises a pressure adjusting spring and an adjusting assembly, the valve rod is precisely controlled to slide under different pressures by adjusting the pressure of the spring, and therefore high-precision control over the brake valve is achieved. In addition, a communicating hole is formed in the valve body to balance pressure of cavities at the two ends of the valve rod, and stability and control precision of movement of the valve rod are improved. According to the reverse electro-hydraulic proportional brake valve, through unique structural design and a pressure adjusting mechanism, the performance and the control accuracy of the reverse electro-hydraulic proportional brake valve are remarkably improved.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic transmission control, and in particular to a reverse electro-hydraulic proportional brake valve. Background Art

[0002] With the continuous development of industrial technology, brake valves are increasingly used in various mechanical equipment, especially in hydraulic transmission systems. The performance of the brake valve directly affects the stability and safety of the entire system. In order to improve the performance of the brake valve, various new structures and technologies continue to emerge.

[0003] In traditional brake valve design, the movement of the valve stem is usually controlled by an electromagnetic actuator to open and close the valve. However, this design often cannot accurately control the opening degree and response time of the valve, especially under different pressure conditions, the performance of the valve may be significantly affected.

[0004] Existing brake valve designs often fail to provide stable performance when facing different pressure environments. The movement of the valve stem may be affected by pressure fluctuations, resulting in inaccurate opening or closing of the valve, or even failure. This problem limits the application of brake valves in high-pressure or variable-pressure environments, affecting the reliability and safety of the entire system. The existing adjustment method is to adjust directly through the spring. Since the tightening bolt is in direct contact with the spring, the spring will be slightly twisted while being compressed during the tightening process, affecting the adjustment accuracy. Summary of the invention

[0005] In order to solve the problems in the background technology, the present application provides a reverse electro-hydraulic proportional brake valve.

[0006] The present application provides a reverse electro-hydraulic proportional brake valve, which adopts the following technical solution: A reverse electro-hydraulic proportional brake valve comprises a valve body, a movable valve stem is arranged in the valve body, an electromagnetic driving device for driving the valve stem to move is arranged on the valve body, a pressure regulating device for regulating the pressure in the valve body is connected to the valve stem, the pressure regulating device comprises a pressure regulating spring and an adjusting component, and the sliding of the valve stem under different pressures is controlled by adjusting the spring pressure.

[0007] Preferably, a connecting hole is provided in the valve body to connect the chambers at both ends of the valve stem to balance the pressure and prevent the normal sliding of the valve stem from being affected by uneven pressure on one side.

[0008] Preferably, a guide is provided between the valve stem and the electromagnetic driving device to further isolate the contact between the valve stem and the electromagnetic driving device and guide the valve stem.

[0009] Preferably, the pressure regulating device comprises a mounting seat, a spring and a pressure block, wherein the pressure block is threadedly connected to a rotating wheel, and the spring pressure is adjusted by rotating the rotating wheel.

[0010] Preferably, a guide rod is provided on the pressing block, and the guide rod passes through the mounting seat and is used for guiding and stopping the pressing block.

[0011] Preferably, the guide rod is provided with scale marks to facilitate reading of the adjusted tightness.

[0012] Preferably, the mounting base is also provided with a perspective window and a guide column to facilitate direct observation of the scale markings.

[0013] Preferably, a connecting block is provided between the spring and the valve stem to guide the valve stem and seal the chamber.

[0014] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting up a pressure regulating device, the movement of the valve stem under different pressures can be accurately adjusted, thereby improving the performance and stability of the brake valve; 2. By setting the connecting hole, the pressure at both ends of the valve stem can be balanced, further reducing the impact of pressure fluctuations on the movement of the valve stem; 3. By setting the guide, the accuracy and stability of the valve stem movement can be ensured; 4. By setting the rotating wheel, the position of the pressure block can be easily adjusted, thereby adjusting the pressure of the spring; 5. By setting the guide rod and scale mark, the position of the pressure block can be accurately controlled to achieve more precise pressure regulation; 6. By setting up the perspective window and guide column, the working status of the voltage regulating device can be observed intuitively, which is convenient for debugging and maintenance; 7. By setting the connecting block, the spring and the valve stem can be easily connected to improve the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of the valve body; Figure 2 It is a front cross-sectional view when in normal connection; Figure 3 This is a front cross-sectional view when the oil inlet chamber is closed; Figure 4 is a side view of the valve body; Figure 5 This is a front cross-sectional view when the oil inlet chamber is closed; Figure 6 This is an enlarged view of point C in the main view.

[0016] Figure numerals: 1. valve body; 11. valve hole; 12. oil inlet; 121. oil inlet chamber; 13. oil return port; 131. oil return chamber; 14. oil outlet; 141. oil outlet chamber; 15. connecting hole; 2. valve stem; 21. oil inlet chamber control flange; 22. oil outlet chamber control flange; 23. oil return chamber control flange; 24. limit flange; 3. electromagnetic driving device; 4. pressure regulating device; 41. spring; 42. abutment block; 43. mounting seat; 44. pressure block; 45. rotating wheel; 46. guide rod; 47. perspective window; 48. guide column; 5. guide. DETAILED DESCRIPTION Example

[0017] The embodiment of the present application provides a reverse electro-hydraulic proportional brake valve, such as Figure 1 As shown, it includes a valve body 1, a movable valve stem 2 is arranged in the valve body 1, and an electromagnetic driving device 3 is arranged on the valve body 1 for driving the valve stem 2 to move. A pressure regulating device 4 for regulating the pressure in the valve body 1 is connected to the valve stem 2, and the pressure regulating device 4 includes a pressure regulating spring 41 and an adjusting component 42, and the sliding of the valve stem 2 under different pressures is controlled by adjusting the spring pressure.

[0018] The valve body 1 has a valve hole 11 for the valve stem 2 to slide, and one side of the valve body has an oil inlet 12 and an oil return port 13; the other side has an oil outlet 14, the oil inlet and return port 12 has an oil inlet cavity 121 connected to the valve hole 11, the oil return port 13 has an oil return cavity 131 connected to the valve hole 11, and the oil outlet 14 has an oil outlet cavity 141 connected to the valve hole 11. The valve stem 2 is provided with an oil inlet cavity control flange 21, an oil outlet cavity control flange 22, an oil return cavity control flange 23 and a limit flange 24 for controlling the on and off of the oil inlet cavity. When the valve body is in a normal operating state, the gap between the oil inlet chamber control flange 21 and the oil outlet chamber control flange 22 allows the oil to flow from the oil inlet chamber 121 to the oil outlet chamber 141, and the oil return chamber control flange 23 is located between the oil return chamber 131 and the oil outlet chamber 141 to close the connection between the oil return chamber 131 and the oil outlet chamber 141, and the limit flange 24 abuts against the electromagnetic driving device. When the oil flow needs to be controlled, the electromagnetic driving device pushes the valve stem 2 to move, and the oil outlet chamber control flange 22 approaches the oil inlet chamber 121, reducing the flow from the oil inlet chamber 121 to the oil outlet chamber 141. The electromagnetic driving device further pushes the valve stem 2 to move, so that the oil outlet chamber control flange 22 moves between the oil inlet chamber 121 and the oil outlet chamber 141, cutting off the oil flow from the oil inlet chamber 121 to the oil outlet chamber 141, and at the same time, the oil return chamber control flange 23 moves to the position of the oil outlet chamber 141, and the oil outlet chamber 141 is connected with the oil return chamber 131.

[0019] A connecting hole 15 is also provided in the valve body 1, which is used to connect the chambers at both ends of the valve stem 2 to balance the pressure, thereby reducing the influence of pressure fluctuations on the movement of the valve stem 2 and improving the stability and reliability of the brake valve. When the oil outlet chamber control flange 22 is in the state of closing the oil inlet chamber 121, due to the high pressure in the oil inlet chamber 121, the movement of the valve stem 2 at this time will be subject to the resistance of the oil pressure in the oil chamber 121, and the pilot connection is made through the connecting hole 15 to balance the pressure at both ends, and the valve stem 2 is affected by the pressure reduction in the oil inlet chamber 121, and smoothly moves to close the connection between the oil inlet chamber 121 and the oil outlet chamber 141.

[0020] Specifically, a guide 5 is provided between the valve stem 2 and the electromagnetic driving device 3, and the guide 5 can ensure the accuracy and stability of the valve stem 2 during movement. The limiting flange 24 abuts against the guide 5 to prevent the valve stem 2 from deflecting or getting stuck.

[0021] Specifically, the pressure regulating device 4 includes a mounting seat 43, a spring 41 and a pressure block 44, and the pressure block 44 is threadedly connected with a rotating wheel 45. By rotating the rotating wheel 45, the position of the pressure block 44 can be easily adjusted, thereby changing the compression amount of the spring 41 and adjusting the pressure of the spring 41. This structure is simple and easy to operate, and is convenient for users to flexibly adjust according to actual needs.

[0022] The implementation principle of this embodiment is: by providing the pressure regulating device 4, the movement of the valve stem 2 under different pressures can be accurately adjusted, thereby improving the performance and stability of the brake valve. At the same time, by providing the connecting hole 11 and the guide 5, the reliability and stability of the brake valve are further improved. In addition, the structural design of the pressure regulating device 4 is simple and practical, which is convenient for users to debug and maintain. Example

[0023] A reverse electro-hydraulic proportional brake valve provided in the embodiment of the present application is different from that in Embodiment 1 in that the specific structure of the pressure regulating device 4 is different.

[0024] Specifically, the pressing block 44 is provided with a guide rod 46, which is passed through the mounting seat 43. The provision of the guide rod 46 can ensure the stability and accuracy of the pressing block 44 during movement, and prevent the pressing block 44 from deflecting or tilting.

[0025] Furthermore, a scale mark 47 is provided on the guide rod 46. By providing the scale mark, the position of the pressing block 44 can be accurately controlled, thereby achieving a more refined pressure regulation effect. The user can accurately adjust the position of the pressing block 44 according to the scale mark to meet different pressure regulation requirements.

[0026] The inner tube 451 of the rotating wheel 45 is rotatably connected to the mounting seat 43. The inner tube 451 of the rotating wheel 45 is provided with a precision thread. A corresponding threaded rod 441 is provided on the pressure block 44. The rotating wheel 45 rotates to drive the pressure block 44 to move. The pressure block can compress the spring without rotating, thereby adjusting the pressure more accurately.

[0027] Furthermore, the mounting seat 43 is also provided with a perspective window 47 and a guide column 48. The setting of the perspective window 47 allows the user to intuitively view the scale marks displayed by the guide column 48, so that the user can more conveniently observe and adjust the position of the pressing block 44.

[0028] In addition, based on the embodiment 1 or the embodiment 2, an abutment block 42 may be further provided between the spring 41 and the valve stem 2. The provision of the connection block 6 can conveniently connect the spring 41 and the valve stem 2, improve the assembly efficiency, and also enhance the connection stability between the spring 41 and the valve stem 2.

[0029] The implementation principle of this embodiment is: by providing structures such as the guide rod 46, the scale mark, the perspective window 47 and the guide column 48, the pressure regulating accuracy and the convenience of operation of the pressure regulating device 4 are further improved, thereby improving the overall performance and user experience of the reverse electro-hydraulic proportional brake valve. At the same time, the provision of the connecting block 42 also improves the assembly efficiency and connection stability.

Claims

1. A reverse electro-hydraulic proportional brake valve, comprising a valve body, a movable valve stem disposed in the valve body, and an electromagnetic driving device for driving the valve stem to move, characterized in that: It also includes a pressure regulating device connected to the valve stem, which is composed of a pressure regulating spring and an adjusting component. The sliding of the valve stem under different pressure environments is controlled by adjusting the pressure of the pressure regulating spring.

2. The reverse electro-hydraulic proportional brake valve according to claim 1, characterized in that: The valve body is provided with a connecting hole for connecting and balancing the chamber pressures at both ends of the valve stem.

3. The reverse electro-hydraulic proportional brake valve according to claim 1 or 2, characterized in that: A guide is arranged between the valve stem and the electromagnetic driving device.

4. The reverse electro-hydraulic proportional brake valve according to claim 1, characterized in that: The pressure regulating device comprises a mounting seat, a spring and a pressing block, and a rotating wheel is threadedly connected to the pressing block.

5. The reverse electro-hydraulic proportional brake valve according to claim 4, characterized in that: The pressing block is provided with a guide rod, and the guide rod is penetrated in the mounting seat.

6. The reverse electro-hydraulic proportional brake valve according to claim 5, characterized in that: The guide rod is marked with scale marks.

7. The reverse electro-hydraulic proportional brake valve according to claim 4, characterized in that: The mounting seat is also provided with a perspective window and a guide column.

8. The reverse electro-hydraulic proportional brake valve according to claim 1, characterized in that: A connecting block is also arranged between the pressure regulating spring and the valve stem.

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