CN-121760987-B - Hydraulic cylinder control valve and working method thereof

Abstract

The invention discloses a hydraulic cylinder control valve and a working method thereof, which relate to the technical field of hydraulic control and aim at solving the problems that the prior art adopts a reversing valve with magnetic force or manpower as a power source, the valve body can only control the flow direction of hydraulic oil, can not regulate the oil pressure, has deficient use functionality and can not be used for high-precision hydraulic cylinder flow control work, and the technical key points are as follows: the hydraulic oil flow control device comprises a composite flow control mechanism, wherein the composite flow control mechanism comprises a valve body and a rotor, the rotor comprises a chassis and a dumbbell-like body, the chassis is attached to the bottom surface inside the valve body, the flow transmission mechanism comprises a P port, an A port, a B port and a T port, the P port, the A port, the B port and the T port are circumferentially distributed on the periphery of the valve body and are respectively in four directions of the front, the rear, the front, the east and the north, so that flow direction control is realized, stepless flow regulation and pressure control are realized, and polymorphic accurate control of the flow direction, the flow and the pressure of hydraulic oil is realized.

Inventors

• FENG YAN
• ZHAN GUIQIANG

Assignees

• 浙江展鹏液压科技有限公司

Dates

Publication Date

20260512

Application Date

20260303

Claims (10)

1. 1. A hydraulic cylinder control valve is characterized by comprising: The composite flow control mechanism comprises a valve body and a rotor, wherein the rotor comprises a chassis and a dumbbell-like body, the chassis is attached to the bottom surface inside the valve body, and the side end surface of the dumbbell-like body is attached to the inner wall of the valve body; The flow conveying mechanism comprises a P port, an A port, a B port and a T port, wherein the P port, the A port, the B port and the T port are circumferentially distributed around the valve body and are respectively in four directions of the front, the rear, the east and the north, the dumbbell-like body comprises a first inward-shrinking cambered surface and a second inward-shrinking cambered surface, a first flow channel is formed by the space formed by the inner wall of the valve body and the first inward-shrinking cambered surface, and a second flow channel is formed by the space formed by the inner wall of the valve body and the second inward-shrinking cambered surface; the control system comprises a magnetic block, a magnetic angle sensor and a PLC controller, a hollow shaft is arranged at the middle position above the dumbbell-like body, the upper end of the hollow shaft is connected with a connecting shaft, the magnetic block is arranged on the outer side of the connecting shaft, the connecting shaft is rotatably arranged on the inner side of the magnetic angle sensor, the rotating angle, the speed and the final stopping position of the connecting shaft are monitored through the magnetic block and the magnetic angle sensor, and information is transmitted to the PLC controller; The control system is characterized in that the outer side of the connecting shaft is also connected with a one-way locking device, the connecting shaft is allowed to rotate anticlockwise through the one-way locking device, the connecting shaft is prevented from rotating anticlockwise, the rotor is allowed to rotate anticlockwise, clockwise is prevented from rotating, the rotating angle, the speed and the final stopping position of the rotor are monitored through the control system, the positions of a first runner and a second runner are controlled through the rotation of the rotor, the communication and blocking between the first runner and the second runner and a P port, an A port, a B port and a T port are controlled through the positions of the first runner and the second runner, and six control modes are formed, wherein the six control modes comprise a forward flow state, a forward flow limiting state, a reverse flow limiting state, a first blocking state and a second blocking state.
2. 2. The hydraulic cylinder control valve according to claim 1, wherein a sealing valve cover is fixedly arranged above the valve body, the upper end face of the dumbbell-like body is attached to the inner wall of the sealing valve cover, the hollow shaft penetrates through the sealing valve cover, and the PLC is fixedly arranged above the sealing valve cover.
3. 3. The hydraulic cylinder control valve according to claim 2, wherein a driving box is fixedly arranged above the sealing valve cover, the magnetic angle sensor is fixedly arranged on the inner wall of the driving box, the magnetic angle sensor is electrically connected with the PLC, a cover plate is fixedly arranged above the driving box, a driving device is fixedly arranged above the cover plate, the driving device is electrically connected with the PLC, and the driving device is in transmission connection with the connecting shaft.
4. 4. The hydraulic cylinder control valve according to claim 1, wherein a plurality of ratchets are arranged on the inner wall of the unidirectional locker, a turntable is rotatably arranged in the unidirectional locker, a gap exists between the outer edge of the turntable and the ratchets, the center position of the turntable is fixedly connected with the connecting shaft, clamping heads are distributed on the periphery circumference of the turntable and are in sliding connection with the turntable, a spring is connected between the clamping heads and the inner wall of the turntable, and the clamping heads are engaged with the ratchets anticlockwise and are in clockwise sliding connection.
5. 5. A hydraulic cylinder control valve according to claim 1, wherein said first flow passage communicates with port P and port A and said second flow passage communicates with port B and port T during said forward flow.
6. 6. The hydraulic cylinder control valve of claim 1, wherein in the forward flow restricting state, the first flow passage communicates with port P and port A, the second flow passage communicates with port B and port T, and the inflow space of port P is reduced and the outflow space of port T is reduced.
7. 7. A hydraulic cylinder control valve according to claim 1, wherein said first flow passage communicates with port P and port B and said second flow passage communicates with port A and port T during said reverse flow.
8. 8. The hydraulic cylinder control valve of claim 1, wherein in the reverse flow restricting state, the first flow passage communicates with port P and port B, the second flow passage communicates with port A and port T, and the inflow space of port A is reduced and the outflow space of port B is reduced.
9. 9. A method of operating a hydraulic cylinder control valve, based on a hydraulic cylinder control valve according to any one of claims 1-8, characterized by the steps of: the method comprises the following steps that S1, a port P is connected with an oil feeding end of an oil pump, a port A is connected with an oil feeding end of a lifting stroke of a hydraulic cylinder, a port B is connected with an oil feeding end of a recovery stroke of the hydraulic cylinder, and a port T is connected with an oil collecting end of the oil pump; S2, driving the connecting shaft to rotate clockwise by using the driving device, and driving the rotor to rotate clockwise by the connecting shaft through the hollow shaft; S3, changing the positions of the first runner and the second runner through rotation of the rotor; S4, when the first flow channel is communicated with the P port and the A port and the second flow channel is communicated with the B port and the T port, the oil pump supplies oil through the P port, and the oil A port in the hydraulic cylinder enters the B port and exits, so that the working state of the hydraulic cylinder is lifted; S5, when the first flow passage is communicated with the P port and the B port and the second flow passage is communicated with the A port and the T port, the oil pump supplies oil through the P port, the B port in the hydraulic cylinder enters the A port and exits, and the working state of the hydraulic cylinder is recovered; s6, when the first flow channel position and the second flow channel are in a first blocking state, redundancy exists in the inner space of the valve body at the port A and the port B; and S7, when the first flow passage position and the second flow passage are in the second blocking state, redundancy exists in the internal spaces of the valve body at the P port and the T port.
10. 10. The method of claim 9, wherein S2, the connecting shaft is enabled to rotate anticlockwise by the unidirectional locking device, and the locking function of the unidirectional locking device is utilized to provide a reversed limiting supporting force for the rotor, so that the rotor cannot rotate clockwise, and the rotor can be kept stable when being extruded by hydraulic oil, and stable oil path conveying capacity is provided.

Description

Hydraulic cylinder control valve and working method thereof Technical Field The invention relates to the technical field of hydraulic control, in particular to a hydraulic cylinder control valve and a working method thereof. Background The hydraulic control valve is a mechanical element for controlling the pressure, flow and direction of fluid in a hydraulic system, and the actuating mechanism is driven to complete preset actions by adjusting fluid parameters. The system is divided into a pressure control valve (comprising an overflow valve, a pressure reducing valve and a sequence valve), a flow control valve (comprising a throttle valve and a speed regulating valve) and a direction control valve (comprising a one-way valve and a reversing valve) according to functions, and can be divided into a slide valve, a cone valve and a ball valve according to structures, wherein a control mode comprises constant value control, proportional control and digital control; the current reversing valve power sources adopted by the hydraulic cylinder are mostly magnetic force or manpower, the valve body can only control the flow direction of hydraulic oil, can not adjust the oil pressure, has deficient use functionality and can not be used for high-precision hydraulic cylinder flow control. Disclosure of Invention The invention aims to provide a hydraulic cylinder control valve and a working method thereof, which are used for solving the problems that the prior hydraulic cylinder in the background art adopts a reversing valve with magnetic force or manpower as a power source, the valve body can only control the flow direction of hydraulic oil, can not adjust the oil pressure, has deficient use functionality and can not be used for high-precision hydraulic cylinder flow control. In order to achieve the purpose, the invention provides the following technical scheme that the hydraulic cylinder control valve comprises: The composite flow control mechanism comprises a valve body and a rotor, wherein the rotor comprises a chassis and a dumbbell-like body, the chassis is attached to the bottom surface inside the valve body, and the side end surface of the dumbbell-like body is attached to the inner wall of the valve body; The flow conveying mechanism comprises a P port, an A port, a B port and a T port, wherein the P port, the A port, the B port and the T port are circumferentially distributed around the valve body and are respectively in four directions of the front, the rear, the east and the north, the dumbbell-like body comprises a first inward-shrinking cambered surface and a second inward-shrinking cambered surface, a first flow channel is formed by the space formed by the inner wall of the valve body and the first inward-shrinking cambered surface, and a second flow channel is formed by the space formed by the inner wall of the valve body and the second inward-shrinking cambered surface; the control system comprises a magnetic block, a magnetic angle sensor and a PLC controller, a hollow shaft is arranged at the middle position above the dumbbell-like body, the upper end of the hollow shaft is connected with a connecting shaft, the magnetic block is arranged on the outer side of the connecting shaft, the connecting shaft is rotatably arranged on the inner side of the magnetic angle sensor, the rotating angle, the speed and the final stopping position of the connecting shaft are monitored through the magnetic block and the magnetic angle sensor, and information is transmitted to the PLC controller; The control system is characterized in that the outer side of the connecting shaft is also connected with a one-way locking device, the connecting shaft is allowed to rotate anticlockwise through the one-way locking device, the connecting shaft is prevented from rotating anticlockwise, the rotor is allowed to rotate anticlockwise, clockwise is prevented from rotating, the rotating angle, the speed and the final stopping position of the rotor are monitored through the control system, the positions of a first runner and a second runner are controlled through the rotation of the rotor, the communication and blocking between the first runner and the second runner and a P port, an A port, a B port and a T port are controlled through the positions of the first runner and the second runner, and six control modes are formed, wherein the six control modes comprise a forward flow state, a forward flow limiting state, a reverse flow limiting state, a first blocking state and a second blocking state. The invention can be further configured in a preferred example that a sealing valve cover is fixedly arranged above the valve body, the upper end face of the dumbbell-like body is attached to the inner wall of the sealing valve cover, the hollow shaft penetrates through the sealing valve cover, and the PLC is fixedly arranged above the sealing valve cover. The invention can be further configured in a preferred example that a driving box is fixed