Novel control valve
By designing a new type of control valve, which adopts a variable adjustment rod and pressure regulating structure, the problems of large size and complex structure of existing motor control valves have been solved, achieving a compact design and efficient regulation, and improving installation portability and maintenance efficiency.
Patent Information
- Application Number
- CN202520300452.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Existing motor control valves are too large and have a complex structure, which leads to difficulties in installation and layout, high production costs, complex maintenance, and is not conducive to portability and energy efficiency.
A novel control valve was designed, comprising a variable adjustment rod, a pressure regulating structure, a flow regulating structure, and a piston assembly. Through a sealed mounting structure and a variable feedback assembly, it achieves precise control of motor displacement, reduces overall size, and improves pressure regulation efficiency.
This design achieves a compact control valve, reduces production costs, improves installation portability and maintenance efficiency, and enhances the control accuracy and adjustment flexibility of the pilot pressure.
Smart Images
Figure CN223676645U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to motor control valve equipment technical field, concretely relates to a novel control valve. BACKGROUND
[0002] At present, motor control valve as the core component can control fluid flow and pressure, control the rotation speed, torque and movement direction of hydraulic or pneumatic drive motor, and is the key to ensure the stable operation of equipment. However, the existing motor control valve has the problems of too large volume and complex structure. In the scene with strict space layout requirements, the too large volume will bring difficulties to installation layout, increase the volume and weight of equipment, and affect the portability and energy utilization efficiency. And the complex structure also increases the production and manufacturing difficulty and cost, prolongs the production cycle, is not conducive to large-scale production, and needs to consume a lot of time and energy for later maintenance, and improves the maintenance cost. SUMMARY
[0003] The utility model aims at the above -mentioned problem, provides a novel control valve.
[0004] In order to achieve the above object, the utility model adopts the following technical scheme: a novel control valve is arranged on the motor, including control valve casing, the control valve casing one end has the variable adjustment rod arranged in the control valve casing, the variable adjustment rod one end is arranged on the control valve casing through sealing mounting structure, and the variable adjustment rod other end is equipped with pressure regulating structure on the circumferential outside, the pressure regulating structure one end circumferential inside is equipped with variable pressure regulating component between the variable adjustment rod, and the pressure regulating structure one end is equipped with flow regulating structure, the flow regulating structure one end is equipped with variable feedback component and pressure regulating structure abuts, and the flow regulating structure other end is equipped with piston assembly, the piston assembly and flow regulating structure can drive variable feedback component to displace towards pressure regulating structure, make the displacement of motor from small displacement to large displacement, the length of variable adjustment rod can be controlled and adjusted to the initial variable pilot pressure, and the sealing mounting structure can ensure the installation stability of variable adjustment rod, the pressure regulating structure can displace according to the pressure of two end oil cavity, thereby controlling the displacement of motor, the variable adjustment component can adjust the size of variable pressure value and improve the reset efficiency of pressure regulating structure.
[0005] In the novel control valve, the flow regulating structure comprises a flow regulating shell, which is arranged axially in the control valve shell, and a ball head mounting hole is arranged in the flow regulating shell, a center ball head is arranged in the ball head mounting hole, a fastening screw abutting against the center ball head is arranged on one side of the ball head mounting hole, the fastening screw is connected with the variable feedback assembly, the fastening screw is fixed in the flow regulating shell through the variable feedback assembly, a fastening gap connected with the fastening screw is arranged on one side of the center ball head, and the fastening screw is arranged in the fastening gap, and the center ball head is fixed in the flow regulating shell through the fastening screw.
[0006] In the novel control valve, the variable feedback assembly comprises a variable feedback cavity arranged at one end of the flow regulating shell, a variable feedback spring is arranged in the variable feedback cavity, one end of the variable feedback spring is arranged abutting against the flow regulating shell, a feedback spring seat is arranged at the other end of the variable feedback spring, the feedback spring seat abuts against the pressure regulating structure, the variable feedback spring is placed in the variable feedback cavity, when the pilot pressure is greater than the piston assembly pressure, the variable feedback spring applies pressure to the flow regulating shell and is compressed, and when the piston assembly pressure is greater than the pilot pressure, the variable feedback spring applies pressure to the feedback spring seat and drives the pressure regulating structure to reset.
[0007] In the novel control valve, the piston assembly comprises a variable piston, the variable piston and the flow regulating shell are in an integrated structure, a piston sleeve is arranged on the circumferential outer side of the end of the variable piston away from the center ball head, the piston sleeve is fixedly connected with the variable piston through a thin head screw, a sealing screw plug is arranged at the end of the control valve shell away from the variable regulating rod, a variable piston oil cavity is arranged between the sealing screw plug and the piston sleeve, the variable piston oil cavity is sealed by the piston sleeve and the sealing screw plug, the oil pressure of the variable piston oil cavity is ensured, when the oil pressure of the variable piston oil cavity is greater than the pilot pressure, the variable piston drives the flow regulating shell to displace towards the regulating structure, and the displacement of the motor is regulated.
[0008] In the novel control valve, the pressure regulating structure comprises a pressure regulating valve core, the pressure regulating valve core is arranged on the circumferential outer side of the variable regulating rod, one end of the pressure regulating valve core abuts against the feedback spring seat, and a pressure regulating valve sleeve is arranged on the circumferential outer side of the pressure regulating valve core, so that the pressure regulating valve core is connected with the oil passage in the control valve shell through the pressure regulating valve sleeve.
[0009] In the new type control valve, the first variable oil cavity and the second variable oil cavity are arranged on the outer side of the pressure regulating valve sleeve, the oil cavity channel is arranged on the outer side of the pressure regulating valve core, the first variable oil cavity and the second variable oil cavity are in communication through the oil cavity channel, the second variable oil cavity is in communication with the variable piston oil cavity through the shuttle valve assembly, the initial state of the variable piston is large displacement state, the first variable oil cavity is in communication with the oil cavity channel, and the first variable oil cavity and the second variable oil cavity are not in communication, when the pilot pressure acts on the pressure regulating valve core, the pressure regulating valve core is displaced towards the variable piston, the first variable oil cavity and the second variable oil cavity are in communication, the second variable oil cavity is in communication with the variable piston oil cavity through the shuttle valve assembly, the area of the variable piston oil cavity is larger, the hydraulic oil is the same, and the variable piston is changed from the large displacement state to the small displacement state.
[0010] In the new type control valve, the shuttle valve assembly includes a shuttle valve body, one end of the shuttle valve body is provided with a valve seat, a sealing steel ball is arranged between the valve seat and the shuttle valve body, one side of the sealing steel ball is provided with an oil passage in communication with the first variable oil cavity, and the side, away from the valve seat, of the shuttle valve body is provided with a first high-pressure oil port in communication with or closed to the oil passage, the side, away from the shuttle valve body, of the valve seat is provided with a second high-pressure oil port in communication with or closed to the oil passage, the flow directions of the hydraulic oil in the first high-pressure oil port and the second high-pressure oil port can be adjusted through the sealing steel ball, the hydraulic oil pressure can be adjusted, one side of the control valve housing is provided with a control structure, one end of the control structure is arranged in the control valve housing, the control structure is in communication with the second high-pressure oil port, the control structure is in communication with the second variable oil cavity through the oil passage in the control valve housing, the hydraulic oil pressure can be adjusted through the control structure, and the end, away from the variable adjusting rod, of the control valve housing is provided with a throttle valve in communication with the control structure, the integrated throttle valve can reduce the production cost, reduce the occupied volume, and improve the motor installation space.
[0011] In the new type control valve, the variable pressure regulating assembly includes a pressure regulating cavity arranged on the inner side of one end of the pressure regulating valve core, the pressure regulating cavity is provided with a pressure regulating spring, the pressure regulating spring is sleeved on the outer side of the variable adjusting rod, the end, away from the variable adjusting rod, of the variable adjusting rod is extended and provided with a spring limiting portion, one end of the pressure regulating spring is arranged in abutment with the spring limiting portion, the pressure regulating spring is sleeved on the outer side of the variable adjusting rod, and one end of the pressure regulating spring is limited by the spring limiting portion, so that the pressure regulating spring cannot exceed the pressure regulating cavity, the pressure regulating spring can adjust the pressure value and improve the reset efficiency of the pressure regulating valve core.
[0012] In the new type control valve, the spring limiting portion and the variable adjusting rod are in an integrated structure, and the spring limiting portion is movably arranged in the movable groove on one side of the feedback spring seat, so that the variable adjusting rod can be movably adjusted through the movable groove.
[0013] In the aforementioned novel control valve, the sealing installation structure includes a sealing nut disposed on the outer circumferential side of one end of the variable adjustment rod. The sealing nut is connected to the variable adjustment rod by a threaded connection, and one side of the sealing nut abuts against the control valve housing. The sealing nut can improve the connection stability between the variable adjustment rod and the control valve housing and ensure the pilot pressure.
[0014] Compared with existing technologies, the advantages of this utility model are:
[0015] 1. One end of the variable adjustment rod passes through the pressure regulating structure and extends into the feedback spring seat, which can improve the assembly efficiency of the variable adjustment rod and improve the control accuracy of the pilot pressure.
[0016] 2. The variable pressure regulating component is located between the pressure regulating valve core and the variable adjustment rod, which can effectively reduce the overall size of the control valve and facilitate the adjustment of the starting and changing pressure value, thereby improving the reset efficiency of the pressure regulating valve core.
[0017] 3. The connection between the second variable oil chamber and the oil chamber channel allows for easy adjustment of the displacement of the variable piston. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model.
[0019] Figure 2 This is a structural cross-sectional view of the present invention.
[0020] Figure 3 yes Figure 2 A magnified structural diagram of part A in the middle.
[0021] Figure 4 This is a schematic diagram of the shuttle valve assembly in this utility model.
[0022] In the diagram: 1. Control valve housing; 2. Variable adjustment rod; 3. Sealing mounting structure; 31. Sealing nut; 4. Pressure regulating structure; 41. Pressure regulating valve core; 42. Pressure regulating valve sleeve; 43. First variable oil chamber; 44. Second variable oil chamber; 45. Oil chamber passage; 5. Variable pressure regulating assembly; 5. Pressure regulating chamber; 51. Pressure regulating spring; 52. Spring limiting part; 53. Flow regulating structure; 6. Flow regulating housing; 61. Ball head mounting hole; 62. Center ball head; 63. Fastening screw; 64. Variable feedback assembly; 7. Variable feedback chamber; 71. Variable feedback spring; 72. Feedback spring seat; 73. Movable groove; 731. Piston assembly; 8. Variable piston; 81. Piston sleeve; 82. Thin-head screw; 83. Sealing plug; 84. Variable piston oil chamber; 85. Shuttle valve assembly; 9. Shuttle valve body; 91. Valve seat; 92. Sealing steel ball; 93. Oil passage; 94. First high-pressure oil port; 95. Second high-pressure oil port. DETAILED DESCRIPTION
[0023] The utility model will be explained in further detail below in combination with the drawings and specific embodiments.
[0024] As Figure 1 , Figure 2 , Figure 3 The novel control valve is arranged on the motor and comprises a control valve shell 1, the control valve shell 1 has a variable adjustment rod 2 extending in the control valve shell 1 at one end, the variable adjustment rod 2 is arranged on the control valve shell 1 through a sealing mounting structure 3 at one end, and the variable adjustment rod 2 is provided with a pressure regulating structure 4 at the circumferential outer side at the other end, the pressure regulating structure 4 is provided with a variable pressure regulating assembly 5 between the circumferential inner side at one end and the variable adjustment rod 2, the pressure regulating structure 4 is provided with a flow regulating structure 6 at one end, the flow regulating structure 6 is provided with a variable feedback assembly 7 abutting against the pressure regulating structure 4 at one end, and the flow regulating structure 6 is provided with a piston assembly 8 at the other end, the variable feedback assembly 7 can be driven to displace towards the pressure regulating structure 4 through the piston assembly 8 and the flow regulating structure 6, so that the displacement of the motor is changed from small displacement to large displacement, the initial variable pilot pressure can be controlled and adjusted by adjusting the length of the variable adjustment rod 2, the installation stability of the variable adjustment rod 2 can be ensured through the sealing mounting structure 3, the displacement of the pressure regulating structure 4 can be controlled according to the oil cavity pressure at both ends, so that the displacement of the motor is controlled, the variable pressure value can be adjusted through the variable adjustment assembly 5, and the reset efficiency of the pressure regulating structure 4 can be improved.
[0025] Specifically, the flow regulating structure 6 comprises a flow regulating shell 61, the flow regulating shell 61 is arranged axially in the control valve shell 1, the flow regulating shell 61 is provided with a ball head mounting hole 62, the ball head mounting hole 62 is provided with a center ball head 63, one side of the ball head mounting hole 62 is provided with a fastening screw 64 abutting against the center ball head 63, the fastening screw 64 is communicated with the variable feedback assembly 7, the fastening screw 64 can be fixed in the flow regulating shell 61 through the variable feedback assembly 7, one side of the center ball head 63 is provided with a fastening gap connected with the fastening screw 64 in a clamping mode, one end of the fastening screw 64 is arranged in the fastening gap, and the center ball head 63 is fixed in the flow regulating shell 61 through the fastening screw 64.
[0026] The variable feedback assembly 7 comprises a variable feedback cavity 71 arranged at one end of the flow regulating shell 61, and a variable feedback spring 72 arranged in the variable feedback cavity 71. One end of the variable feedback spring 72 is arranged in abutment with the flow regulating shell 61, and the other end of the variable feedback spring 72 is provided with a feedback spring seat 73 which is arranged in abutment with the pressure regulating structure 4. The variable feedback spring 72 can be conveniently placed in the variable feedback cavity 71, and when the pilot pressure is greater than the pressure of the piston assembly 8, the variable feedback spring 72 exerts a pressure towards the flow regulating shell 61 and is compressed. When the pressure of the piston assembly 8 is greater than the pilot pressure, the variable feedback spring 72 exerts a pressure towards the feedback spring seat 73 to drive the pressure regulating structure 41 to reset.
[0027] As shown in Figure 2 , Figure 3 , Figure 4 , the piston assembly 8 comprises a variable piston 81 which is of an integral structure with the flow regulating shell 61. The variable piston 81 is provided with a piston sleeve 82 which is arranged at the outer side in the circumferential direction of one end of the variable piston 81 away from the center ball head 63. The piston sleeve 82 is fixedly connected with the variable piston 81 through a thin-head screw 83. The thin-head screw 83 can ensure the stability of the connection between the piston sleeve 82 and the variable piston 81. The control valve shell 1 is provided with a sealing plug 84 at one end away from the variable regulating rod 2. The variable piston oil cavity 85 is arranged between the sealing plug 84 and the piston sleeve 82. The variable piston oil cavity 85 is sealed by the piston sleeve 82 and the sealing plug 84 to ensure the oil pressure of the variable piston oil cavity 85. When the oil pressure of the variable piston oil cavity 85 is greater than the pilot pressure, the variable piston 81 drives the flow regulating shell 61 to displace towards the regulating structure 4 to regulate the displacement of the motor.
[0028] Further, the pressure regulating structure 4 comprises a pressure regulating valve core 41 which is arranged at the outer side in the circumferential direction of the variable regulating rod 2, and one end of the pressure regulating valve core 41 is arranged in abutment with the feedback spring seat 73. The pressure regulating valve core 41 is provided with a pressure regulating valve sleeve 42 at the outer side in the circumferential direction. The pressure regulating valve sleeve 42 can make the pressure regulating valve core 41 communicate with the oil passage in the control valve shell 1.
[0029] Wherein, the pressure regulating valve sleeve 42 is provided with equidistantly arranged first variable oil cavity 43 and second variable oil cavity 44 on the outer side, the pressure regulating valve core 41 is provided with oil cavity passage 45 on the outer side, the first variable oil cavity 43 and the second variable oil cavity 44 are communicated through the oil cavity passage 45, and the second variable oil cavity 44 is communicated with the variable piston oil cavity 85 through the shuttle valve assembly 9. The initial state of the variable piston 81 is large displacement state, the first variable oil cavity 43 is communicated with the oil cavity passage 45, and the first variable oil cavity 43 and the second variable oil cavity 44 are not communicated with each other. When the pilot pressure acts on the pressure regulating valve core 41, the pressure regulating valve core 41 is displaced towards the variable piston 81, the first variable oil cavity 43 and the second variable oil cavity 44 are communicated, and the second variable oil cavity 44 is communicated with the variable piston oil cavity 85 through the shuttle valve assembly 9. The area of the variable piston oil cavity 85 is larger, and the hydraulic oil is the same, and the variable piston 81 is changed from large displacement state to small displacement state.
[0030] Combining Figure 2 , Figure 3 , Figure 4 As shown in the figure, the shuttle valve assembly 9 includes a shuttle valve body 91, one end of the shuttle valve body 91 is provided with a valve seat 92, a sealing steel ball 93 is arranged between the valve seat 92 and the shuttle valve body 91, one side of the sealing steel ball 93 is provided with an oil passage 94 communicated with the first variable oil cavity 43, and the side of the shuttle valve body 91 away from the valve seat 92 is provided with a first high-pressure oil port 95 communicated with or closed to the oil passage 94. The side of the valve seat 92 away from the shuttle valve body 91 is provided with a second high-pressure oil port 96 communicated with or closed to the oil passage 94, and the flow direction of the hydraulic oil in the first high-pressure oil port 95 and the second high-pressure oil port 96 can be adjusted through the sealing steel ball 93, which is convenient for adjusting the oil pressure of the hydraulic oil. The control valve housing 1 is provided with a control structure, one end of the control structure is arranged in the control valve housing 1, the control structure is communicated with the second high-pressure oil port 96, the control structure is communicated with the second variable oil cavity 44 through the oil passage 94 in the control valve housing 1, and the oil pressure of the hydraulic oil can be adjusted through the control structure. The end of the control valve housing 1 away from the variable adjusting rod 2 is provided with a throttle valve communicated with the control structure, and the integrated throttle valve can reduce the production cost, reduce the occupied volume, and improve the motor installation space.
[0031] The variable pressure regulating assembly 5 includes a pressure regulating cavity 51 arranged on the circumferential inner side of one end of the pressure regulating valve core 41, the pressure regulating cavity 51 is provided with a pressure regulating spring 52, the pressure regulating spring 52 is sleeved on the circumferential outer side of the variable adjusting rod 2, the variable adjusting rod 2 is provided with a spring limiting portion 53 on the circumferential outer side of one end, and one end of the pressure regulating spring 52 is arranged in abutment with the spring limiting portion 53. The pressure regulating spring 52 is sleeved on the circumferential outer side of the variable adjusting rod 2, and one end of the pressure regulating spring 52 is limited by the spring limiting portion 53, which can prevent the pressure regulating spring 52 from exceeding the pressure regulating cavity 51, and the pressure regulating spring 52 can adjust the size of the pressure value and improve the reset efficiency of the pressure regulating valve core 41.
[0032] Specifically, the spring limiting portion 53 is in an integral structure with the variable adjusting rod 2, and the spring limiting portion 53 is movably arranged in the movable slot 731 on one side of the feedback spring seat 73, and the variable adjusting rod 2 can be conveniently adjusted through the movable slot 731.
[0033] As shown in Figure 1 Figure 2 As shown in the figure, the sealing installation structure 3 comprises a sealing nut 31 arranged on the outer side of one end of the variable adjusting rod 2 in the circumferential direction, the sealing nut 31 is connected with the variable adjusting rod 2 through threads, and one side of the sealing nut 31 abuts against the control valve housing 1, so that the connection stability between the variable adjusting rod 2 and the control valve housing 1 can be improved and the pilot pressure can be ensured.
[0034] The principle of the embodiment is that the pilot pressure acts on the pressure regulating valve spool 41 to push the pressure regulating valve spool 41 to open the second variable oil cavity 44, since the oil cavity pressure at both ends of the variable piston 81 is the same and the areas are different, the variable piston 81 moves from the initial large displacement position to the small displacement position, then the variable feedback spring 72 acts on the feedback spring seat 73 to push the pressure regulating valve spool 41 to return, and the second variable oil cavity 44 is closed. But since it is a dynamic balance, the motor relative to the previous displacement will be reduced according to the size of the pilot pressure. Continue to increase the pilot pressure, the pressure regulating valve spool 41 continues to open the second variable oil cavity 44, so that the position of the variable piston 81 continues to move, the displacement decreases, and then acts on the pressure regulating valve spool 41, so that the second variable oil cavity 44 is closed, and is in a dynamic balance state.
[0035] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.
[0036] Although the control valve housing 1, the variable adjusting rod 2, the sealing mounting structure 3, the sealing nut 31, the pressure regulating structure 4, the pressure regulating valve core 41, the pressure regulating valve sleeve 42, the first variable oil cavity 43, the second variable oil cavity 44, the oil cavity passage 45, the variable pressure regulating assembly 5, the pressure regulating cavity 51, the pressure regulating spring 52, the spring limiting part 53, the flow adjusting structure 6, the flow adjusting housing 61, the ball head mounting hole 62, the center ball head 63, the fastening screw 64, the variable feedback assembly 7, the variable feedback cavity 71, the variable feedback spring 72, the feedback spring seat 73, the movable slot 731, the piston assembly 8, the variable piston 81, the piston sleeve 82, the thin head screw 83, the sealing screw plug 84, the variable piston oil cavity 85, the shuttle valve assembly 9, the shuttle valve body 91, the valve seat 92, the sealing steel ball 93, the oil passage 94, the first high pressure oil port 95, the second high pressure oil port 96 and other terms are used more in this article, but the possibility of using other terms is not excluded. Using these terms is only to facilitate the description and explanation of the essence of the utility model; it is contrary to the spirit of the utility model to interpret them as any kind of additional limitation.
Claims
1. A new type of control valve, provided on a motor, comprising a control valve housing (1), one end of which has a variable adjustment rod (2) extending in the control valve housing (1), one end of the variable adjustment rod (2) being provided on the control valve housing (1) through a sealing mounting structure (3), and the other end of the variable adjustment rod (2) being provided with a pressure regulating structure (4) on the outer side in the circumferential direction, characterized in that, The variable pressure regulating component (5) is arranged between the one end of the variable pressure regulating structure (4) and the variable adjusting rod (2), the variable pressure regulating structure (4) is provided with the flow adjusting structure (6) at one end, the flow adjusting structure (6) is provided with the variable feedback component (7) abutting against the variable pressure regulating structure (4) at one end, and the flow adjusting structure (6) is provided with the piston component (8) at the other end.
2. A new control valve according to claim 1, characterized in that The flow adjusting structure (6) comprises a flow adjusting shell (61), the flow adjusting shell (61) is arranged axially in the control valve shell (1), the flow adjusting shell (61) is provided with a ball head mounting hole (62) therein, the ball head mounting hole (62) is provided with a center ball head (63) therein, one side of the ball head mounting hole (62) is provided with a fastening screw (64) abutting against the center ball head (63), and the fastening screw (64) is communicated with the variable feedback component (7).
3. A new control valve according to claim 2, characterized in that The variable feedback component (7) comprises a variable feedback cavity (71) arranged at one end of the flow adjusting shell (61), the variable feedback cavity (71) is provided with a variable feedback spring (72) therein, one end of the variable feedback spring (72) is arranged abutting against the flow adjusting shell (61), the other end of the variable feedback spring (72) is provided with a feedback spring seat (73), and the feedback spring seat (73) abuts against the variable pressure regulating structure (4).
4. A new control valve according to claim 2, characterized in that The piston component (8) comprises a variable piston (81), the variable piston (81) and the flow adjusting shell (61) are of an integral structure, a piston sleeve (82) is arranged on the outer side of the one end of the variable piston (81) away from the center ball head (63), the piston sleeve (82) is fixedly connected with the variable piston (81) through a thin head screw (83), the control valve shell (1) is provided with a sealing screw plug (84) at the one end away from the variable adjusting rod (2), and the variable piston oil cavity (85) is arranged between the sealing screw plug (84) and the piston sleeve (82).
5. A new control valve according to claim 3 or 4, characterized in that The variable pressure regulating structure (4) comprises a variable pressure regulating valve core (41), the variable pressure regulating valve core (41) is arranged on the outer side of the variable adjusting rod (2) in a sleeving mode, one end of the variable pressure regulating valve core (41) abuts against the feedback spring seat (73), and the outer side of the variable pressure regulating valve core (41) is provided with a variable pressure regulating valve sleeve (42).
6. A new control valve according to claim 5, characterized in that The outer side of the variable pressure regulating valve sleeve (42) is provided with a first variable oil cavity (43) and a second variable oil cavity (44) arranged at equal intervals, the outer side of the variable pressure regulating valve core (41) is provided with an oil cavity channel (45), the first variable oil cavity (43) and the second variable oil cavity (44) are movably communicated through the oil cavity channel (45), and the second variable oil cavity (44) is communicated with the variable piston oil cavity (85) through the shuttle valve component (9).
7. A new control valve according to claim 6, characterized in that The shuttle valve assembly (9) includes a shuttle valve body (91), one end of the shuttle valve body (91) is provided with a valve seat (92), a sealing steel ball (93) is arranged between the valve seat (92) and the shuttle valve body (91), one side of the sealing steel ball (93) is provided with an oil passage (94) connected with the first variable oil cavity (43), and the shuttle valve body (91) away from the valve seat (92) side is provided with a first high-pressure oil port (95) connected with the oil passage (94) or closed, and the valve seat (92) away from the shuttle valve body (91) side is provided with a second high-pressure oil port (96) connected with the oil passage (94) or closed.
8. A new control valve according to claim 5, characterized in that, The variable pressure regulating assembly (5) includes a pressure regulating cavity (51) arranged on the circumferential inner side of one end of the pressure regulating valve core (41), the pressure regulating cavity (51) is provided with a pressure regulating spring (52), the pressure regulating spring (52) is sleeved on the circumferential outer side of the variable adjusting rod (2), the variable adjusting rod (2) is provided with a spring limiting portion (53) extending on the circumferential outer side of one end, and one end of the pressure regulating spring (52) is arranged in abutment with the spring limiting portion (53).
9. A new control valve according to claim 8, characterized in that The spring limiting portion (53) and the variable adjusting rod (2) are in an integral structure, and the spring limiting portion (53) is movably arranged in the movable groove (731) on one side of the feedback spring seat (73).
10. A new control valve as claimed in claim 1, characterized in that The sealing installation structure (3) includes a sealing nut (31) arranged on the circumferential outer side of one end of the variable adjusting rod (2), the sealing nut (31) and the variable adjusting rod (2) are connected through threads, and one side of the sealing nut (31) abuts against the control valve shell (1).