Dual-channel Synchronous Hydraulic Pushing System

Abstract

The present invention relates to a dual-channel synchronous hydraulic feeding system, which includes a hydraulic system, a control system, and an actuator; the hydraulic system adopts a dual-channel independent design, and realizes dual-channel synchronous adjustment through the logical control of the control system; the hydraulic system includes an A-side hydraulic mechanism and a B-side hydraulic mechanism arranged symmetrically, and the A-side hydraulic mechanism and the B-side hydraulic mechanism are connected by a movable push plate; the structure of the present invention is simple and ingeniously designed. The provided dual-channel synchronous hydraulic feeding system has a high degree of automation, is not affected by loads, and is convenient to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of tail vegetable waste treatment systems, and particularly relates to a dual-channel synchronous hydraulic feeding system. Background Art

[0002] With the country's emphasis on environmental protection, the demand for large-scale tail vegetable waste treatment is increasing continuously. In large-scale tail vegetable waste treatment projects, a feeding device with a large feeding volume, energy-saving, and stable performance is required to assist in the quantitative feeding of tail vegetable waste. However, due to the large interval of the feeding device and serious unbalance of force, the hydraulic system composed of traditional synchronous motors, synchronous valves, etc. cannot achieve effective synchronization. Also, because of the long feeding stroke, the use of a single-cylinder device occupies a large area, and the use of the equipment is severely restricted.

[0003] In view of the above technical problems, improvements are needed. Summary of the Invention

[0004] The invention is to overcome the above-mentioned defects in the prior art, and provides a dual-channel synchronous hydraulic feeding system with a compact and reasonable structure, ingenious design, and not affected by load.

[0005] To achieve the above object, the technical solution adopted by the invention is: a dual-channel synchronous hydraulic feeding system, including a hydraulic system, a control system, and an actuator; the hydraulic system adopts a dual-channel independent design, and realizes dual-channel synchronous adjustment through the logic control of the control system; the hydraulic system includes a symmetrically arranged A-side hydraulic mechanism and a B-side hydraulic mechanism, and the A-side hydraulic mechanism and the B-side hydraulic mechanism are connected by a movable push plate.

[0006] As a preferred embodiment of the invention, the control system is controlled by a PLC system. To ensure that the A-side hydraulic mechanism and the B-side hydraulic mechanism maintain a relatively parallel position, the PLC system is used to control the solenoid valve to work to ensure the consistency of the strokes on both sides.

[0007] As a preferred embodiment of the invention, the PLC system control includes a first position sensor and a second position sensor for detecting the elongation position error of the hydraulic cylinder; wherein, the first position sensor and the second position sensor are connected to the movable push plate.

[0008] As a preferred embodiment of the invention, the A-side hydraulic mechanism includes: a first filter, a first fixed-displacement pump, a first relief valve, a first pressure gauge, a first spring check valve, a first solenoid directional valve, a first flow dividing and collecting valve, a second flow dividing and collecting valve, a first hydraulic cylinder, and a second hydraulic cylinder.

[0009] As a preferred embodiment of the present invention, the hydraulic mechanism on the B side includes a second filter, a second unidirectional fixed-displacement pump, a second relief valve, a second pressure gauge, a second spring check valve, a second solenoid-operated directional valve, a third flow dividing and collecting valve, a fourth flow dividing and collecting valve, a third hydraulic cylinder, and a fourth hydraulic cylinder.

[0010] As a preferred embodiment of the present invention, the actuator includes a movable push plate, a universal joint, a hydraulic cylinder device, a movable oil cylinder frame, a base, and a hydraulic pump station; the universal joint is an intermediate connecting member between the hydraulic cylinder device and the movable push plate, and is used to adjust the force direction between the hydraulic cylinder device and the movable push plate to avoid excessive radial force acting on the hydraulic cylinder device.

[0011] As a preferred embodiment of the present invention, there are 4 hydraulic cylinder devices, specifically including a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder, and a fourth hydraulic cylinder.

[0012] As a preferred embodiment of the present invention, the movable oil cylinder frame is an installation bracket for the cylinder bodies of two hydraulic cylinder devices on one side, and the two hydraulic cylinder devices on one side are installed in parallel and reversely on the movable oil cylinder frame; a hydraulic pump station is connected to the outside of the hydraulic cylinder device.

[0013] As a preferred embodiment of the present invention, there are rollers on both sides in front and behind the movable oil cylinder frame. The front rollers are used for walking on the ground, and the rear pipe rollers walk in the guide grooves of the base.

[0014] As a preferred embodiment of the present invention, the base is fixedly installed on the ground, and guide grooves are provided on both sides of the base. The rollers on both sides of the tail of the bracket of the movable oil cylinder frame move in the guide grooves to ensure that the oil cylinder does not deviate in the horizontal direction by guiding the oil cylinder bracket.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The structure of the present invention is simple and ingeniously designed. The provided dual-channel synchronous hydraulic feeding system has a high degree of automation, is not affected by the load, and is convenient to operate.

[0017] 2. The actuator of the present invention adopts a single-side double-cylinder design, which can achieve a stroke of 2L distance under the same cylinder size, reduces the space requirement of the equipment, and improves the space utilization rate. Description of the Drawings

[0018] Figure 1 is the top view of the actuator in the embodiment of the present invention;

[0019] Figure 2 is the side view of the actuator in the embodiment of the present invention;

[0020] Figure 3 is the main program flow block diagram of the automatic operation of the dual-channel synchronous hydraulic feeding system in the embodiment of the present invention;

[0021] Figure 4 is the flowchart of the hydraulic cylinder extension subroutine of the dual-channel synchronous hydraulic pusher system according to the embodiment of the present invention;

[0022] Figure 5 is the flowchart of the hydraulic cylinder retraction program of the dual-channel synchronous hydraulic pusher system according to the embodiment of the present invention;

[0023] Figure 6 is the schematic diagram of the dual-channel synchronous hydraulic pusher system according to the embodiment of the present invention;

[0024] Reference numerals in the figure: first filter 1, second filter 2, first unidirectional fixed displacement pump 3, second unidirectional fixed displacement pump 4, first overflow valve 5, second overflow valve 6, first pressure gauge 7, second pressure gauge 8, first spring check valve 9, second spring check valve 10, first electromagnetic directional valve 11, second electromagnetic directional valve 12, first flow dividing and collecting valve 13, second flow dividing and collecting valve 14, third flow dividing and collecting valve 15, fourth flow dividing and collecting valve 16, first hydraulic cylinder 17, second hydraulic cylinder 18, third hydraulic cylinder 19, fourth hydraulic cylinder 20, movable push plate 21, universal joint 112, hydraulic cylinder device 113, movable cylinder frame 114, base 115, hydraulic pump station 116, first position sensor B1, second position sensor B2. Detailed implementation manners

[0025] The following will make a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0026] Embodiment:

[0027] As Figure 1-6 shown, the dual-channel synchronous hydraulic pusher system includes a hydraulic system, a control system and an actuator; the hydraulic system adopts a dual-channel independent design, and realizes dual-channel synchronous adjustment through the logic control of the control system; the hydraulic system includes an A-side hydraulic mechanism and a B-side hydraulic mechanism arranged symmetrically, and the A-side hydraulic mechanism and the B-side hydraulic mechanism are connected by a movable push plate 21; the structure of the present invention is simple and ingeniously designed. The provided dual-channel synchronous hydraulic pusher system has a high degree of automation, is not affected by loads, and is convenient to operate.

[0028] The A-side hydraulic mechanism and the B-side hydraulic mechanism are respectively composed of a first hydraulic cylinder 17, a second hydraulic cylinder 18, a third hydraulic cylinder 19, and a fourth hydraulic cylinder 20 to form an action execution structure. When the hydraulic system works, the strokes of the two hydraulic cylinders are superimposed as the working stroke on one side, realizing long-stroke movement under a small assembly distance.

[0029] After the hydraulic system is started, the first unidirectional fixed displacement pump 3 and the second unidirectional fixed displacement pump 4 start to work at the same time. The first electromagnetic directional valve 11 is not energized and is in an intermediate state. The hydraulic oil flows back into the fuel tank, and the system is in a non-pressure state.

[0030] Specifically, the hydraulic mechanism on the A side includes: a first filter 1, a first one-way fixed-displacement pump 3, a first overflow valve 5, a first pressure gauge 7, a first spring check valve 9, a first electromagnetic directional valve 11, a first flow dividing and collecting valve 13, a second flow dividing and collecting valve 14, a first hydraulic cylinder 17, and a second hydraulic cylinder 18. When the hydraulic cylinders in the hydraulic mechanism on the A side need to extend, the solenoid valve 1YA of the first electromagnetic directional valve 11 is energized, and the hydraulic oil flows through the first spring check valve 9 and then to the first flow dividing and collecting valve 13. The first flow dividing and collecting valve 13 evenly distributes the hydraulic oil to the first hydraulic cylinder 17 and the second hydraulic cylinder 18. The cylinder push rods extend simultaneously to push the movable push plate 21 forward. The return oil of the cylinders is collected by the second flow dividing and collecting valve 14 and then returns to the fuel tank through the first electromagnetic directional valve 11. The strokes of the first hydraulic cylinder 17 and the second hydraulic cylinder 18 are superimposed as the operating stroke of the movable push plate 21. Conversely, when the hydraulic cylinders in the hydraulic mechanism on the A side need to retract, the solenoid valve 2YA of the first electromagnetic directional valve 11 is energized, and the hydraulic oil flows through the first spring check valve 9 and then to the second flow dividing and collecting valve 14. The second flow dividing and collecting valve 14 evenly distributes the hydraulic oil to the first hydraulic cylinder 17 and the second hydraulic cylinder 18. The cylinder push rods extend simultaneously to push the movable push plate 21 to retract. The return oil of the cylinders is collected by the first flow dividing and collecting valve 13 and then returns to the fuel tank through the first electromagnetic directional valve 11. The strokes of the first hydraulic cylinder 17 and the second hydraulic cylinder 18 are superimposed as the operating stroke of the movable push plate 21.

[0031] Specifically, the hydraulic mechanism on the B side includes a second filter 2, a second one-way fixed-displacement pump 4, a second overflow valve 6, a second pressure gauge 8, a second spring check valve 10, a second electromagnetic directional valve 12, a third flow dividing and collecting valve 15, a fourth flow dividing and collecting valve 16, a third hydraulic cylinder 19, and a fourth hydraulic cylinder 20.

[0032] When the hydraulic cylinder of the B-side hydraulic mechanism needs to extend, the solenoid valve 1YA of the second electromagnetic directional valve 12 is energized, and the hydraulic oil flows through the second spring check valve 10 and then to the fourth flow dividing and collecting valve 16. The fourth flow dividing and collecting valve 16 evenly distributes the hydraulic oil to the third hydraulic cylinder 19 and the fourth hydraulic cylinder 20. The cylinder push rods extend simultaneously to push the movable push plate 21 forward. The return oil of the hydraulic cylinder is collected by the third flow dividing and collecting valve 15 and then returns to the fuel tank through the second electromagnetic directional valve 12. The strokes of the third hydraulic cylinder 19 and the fourth hydraulic cylinder 20 are superimposed as the operating stroke of the movable push plate 21. Conversely, when the hydraulic cylinder of the B-side hydraulic mechanism needs to retract, the solenoid valve 3YA of the second electromagnetic directional valve 12 is energized, and the hydraulic oil flows through the second spring check valve 10 and then to the third flow dividing and collecting valve 15. The third flow dividing and collecting valve 15 evenly distributes the hydraulic oil to the third hydraulic cylinder 19 and the fourth hydraulic cylinder 20. The cylinder push rods extend simultaneously to push the movable push plate 21 to retract. The return oil of the hydraulic cylinder is collected by the fourth flow dividing and collecting valve 16 and then returns to the fuel tank through the second electromagnetic directional valve 12. The strokes of the third hydraulic cylinder 19 and the fourth hydraulic cylinder 20 are superimposed as the operating stroke of the movable push plate 21.

[0033] The control system is controlled by a PLC system. Since the A-side hydraulic mechanism and the B-side hydraulic mechanism adopt separate independent oil supply systems, the unbalanced force on the movable push plate 21 will not affect the oil supply balance on both sides. The operation of the hydraulic cylinder is only affected by the control of the solenoid valve. To ensure that the A-side hydraulic mechanism and the B-side hydraulic mechanism maintain a relatively parallel position, the PLC system is used to control the operation of the solenoid valve to ensure the consistency of the strokes on both sides.

[0034] The PLC system control includes a first position sensor B1 and a second position sensor B2 for detecting the elongation position error of the hydraulic cylinder. Among them, the first position sensor B1 and the second position sensor B2 are connected to the movable push plate 21. Specifically, the control logic of the PLC system control system is as follows: Press the power button, and the electric control system starts. Start the PLC, the first one-way fixed-displacement pump 3, and the second one-way fixed-displacement pump 4 one by one. The hydraulic oil forms an internal circulation and is in a standby state. The system monitors the position signals of the first position sensor B1 and the second position sensor B2 in real time and waits for the operation instruction. There are only two buttons for the system operation instruction, namely extend and retract. The buttons are self-resetting normally open buttons and can be controlled by jogging.

[0035] The specific operation process is as follows: When the extend button is pressed, the system starts to call the extend subroutine. The program determines whether the position error between the first position sensor B1 and the second position sensor B2 is greater than 3 mm and whether the first position sensor B1 and the second position sensor B2 are at the maximum position, and decides whether to supply power to the solenoid valve 1YA and the solenoid valve 4YA. The power supply logic is: The side at the maximum position is not powered or the side with a position distance greater than 3 mm from the other side is not powered, otherwise both are powered. At this time, the cylinders on both sides extend simultaneously to push the movable push plate forward, or the hydraulic cylinder on the powered side extends to gradually correct the position error on both sides. During this process, the position parameters are continuously read until the subroutine stops when the positions of both the first position sensor B1 and the second position sensor B2 reach the maximum position, and the system re-enters the main program; or when it is monitored that the stroke error exceeds 3 mm (or the position of one side reaches the maximum value), the power supply to the faster side is cut off and the extend subroutine is executed again. While continuously correcting the position error, the cylinders are gradually extended to push the movable push plate forward until the extend button is released, and both the solenoid valve 1YA and the solenoid valve 4YA are powered off, and the system re-enters the main program.

[0036] When the retract button is pressed, the system starts to call the retract subroutine. The program determines whether the position error between the first position sensor B1 and the second position sensor B2 is greater than 3 mm and whether the first position sensor B1 and the second position sensor B2 are at the minimum position, and decides whether to supply power to the solenoid valve 2YA and the solenoid valve 3YA. The power supply logic is: The side at the minimum position is not powered or the side with a position distance less than 3 mm from the other side is not powered, otherwise both are powered. At this time, the cylinders on both sides retract simultaneously to push the movable push plate backward, or the hydraulic cylinder on the powered side retracts to gradually correct the position error on both sides. During this process, the position parameters are continuously read until the subroutine stops when the positions of both the first position sensor B1 and the second position sensor B2 reach the minimum position, and the system re-enters the main program; or when it is monitored that the stroke error exceeds 3 mm (or the position of one side reaches the minimum value), the power supply to the faster side is cut off and the retract subroutine is executed again. While continuously correcting the position error, the cylinders are gradually retracted to pull the movable push plate backward until the extend button is released, and both the solenoid valve 1YA and the solenoid valve 4YA are powered off, and the system re-enters the main program.

[0037] The actuator of this system adopts a single-sided double-cylinder design, which can achieve a stroke of 2L distance with the same Lb cylinder size, reducing the space requirement of the equipment.

[0038] The actuator of this system includes a movable push plate 21, a universal joint 112, a hydraulic cylinder device 113, a movable hydraulic cylinder frame 114, a base 115, and a hydraulic pump station 116; the movable push plate 21 is a steel structure member equipped with rollers and can be pushed horizontally on the ground; the universal joint 112 is an intermediate connecting member between the hydraulic cylinder device 113 and the movable push plate 111, used to adjust the force direction between the hydraulic cylinder device 113 and the movable push plate 21, avoiding excessive radial force acting on the hydraulic cylinder device 113.

[0039] There are 4 hydraulic cylinder devices 113, all of the same specification and model, ensuring a smaller flow error of hydraulic oil during operation; specifically, it includes a first hydraulic cylinder 17, a second hydraulic cylinder 18, a third hydraulic cylinder 19, and a fourth hydraulic cylinder 20.

[0040] The movable hydraulic cylinder frame 114 is an installation bracket for the cylinder bodies of two hydraulic cylinder devices 113 on one side. The two hydraulic cylinder devices 113 on one side are installed in parallel and reversely on the movable hydraulic cylinder frame 114; the outside of the hydraulic cylinder device 113 is connected to a hydraulic pump station 116.

[0041] There are rollers on both the front and back sides of the movable hydraulic cylinder frame 114. The front rollers are used to walk on the ground, and the rear rollers walk in the guide grooves of the base 115; the torque of the reaction forces of the rollers from the ground and the guide grooves cancels out the torque formed by the non - concentricity of the double hydraulic cylinders, ensuring the radial force on the hydraulic cylinders.

[0042] The base 115 is fixedly installed on the ground and is the fixed support point of the system. Guide grooves are provided on both sides of the base 115, and the rollers on both sides of the tail of the bracket of the movable hydraulic cylinder frame 114 move in the guide grooves, ensuring that the hydraulic cylinders do not deviate in the horizontal direction by guiding the hydraulic cylinder bracket.

[0043] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0044] Although this text uses more reference numerals in the drawings: the first filter 1, the second filter 2, the first one-way metering pump 3, the second one-way metering pump 4, the first overflow valve 5, the second overflow valve 6, the first pressure gauge 7, the second pressure gauge 8, the first spring check valve 9, the second spring check valve 10, the first electromagnetic directional valve 11, the second electromagnetic directional valve 12, the first flow dividing and collecting valve 13, the second flow dividing and collecting valve 14, the third flow dividing and collecting valve 15, the fourth flow dividing and collecting valve 16, the first hydraulic cylinder 17, the second hydraulic cylinder 18, the third hydraulic cylinder 19, the fourth hydraulic cylinder 20, the movable push plate 21, the universal joint 112, the hydraulic cylinder device 113, the movable oil cylinder frame 114, the base 115, the hydraulic pump station 116, the first position sensor B1, the second position sensor B2 and other terms, it does not exclude the possibility of using other terms; the use of these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. Dual-channel synchronous hydraulic feeding system, characterized in that: It includes a hydraulic system, a control system and an actuator; the hydraulic system adopts a dual-channel independent design and realizes dual-channel synchronous adjustment through the logic control of the control system; the hydraulic system includes an A-side hydraulic mechanism and a B-side hydraulic mechanism arranged symmetrically, and the A-side hydraulic mechanism and the B-side hydraulic mechanism are connected by a movable push plate (21). The actuator includes a movable push plate (21), a universal joint (112), a hydraulic cylinder device (113), a movable oil cylinder frame (114), a base (115) and a hydraulic pump station (116); the universal joint (112) is an intermediate connecting member between the hydraulic cylinder device (113) and the movable push plate (111), and is used to adjust the force direction between the hydraulic cylinder device (113) and the movable push plate (111) to avoid excessive radial force acting on the hydraulic cylinder device (113). There are 4 hydraulic cylinder devices (113), specifically including a first hydraulic cylinder (17), a second hydraulic cylinder (18), a third hydraulic cylinder (19) and a fourth hydraulic cylinder (20). The movable oil cylinder frame (114) is an installation bracket for the cylinder bodies of two hydraulic cylinder devices (113) on one side, and the two hydraulic cylinder devices (113) on one side are installed in parallel and reversely on the movable oil cylinder frame (114); a hydraulic pump station (116) is connected to the outside of the hydraulic cylinder device (113).

2. The dual-channel synchronous hydraulic feeding system according to claim 1, characterized in that: The control system is controlled by a PLC system. To ensure that the A-side hydraulic mechanism and the B-side hydraulic mechanism maintain a relatively parallel position, the PLC system is used to control the solenoid valve to work to ensure the consistency of the strokes on both sides.

3. The dual-channel synchronous hydraulic feeding system according to claim 2, characterized in that: The PLC system control includes a first position sensor (B1) and a second position sensor (B2) for detecting the elongation position error of the hydraulic cylinder; among them, the first position sensor (B1) and the second position sensor (B2) are connected to the movable push plate (21).

4. The dual-channel synchronous hydraulic feeding system according to claim 1 or 2, characterized in that: The A-side hydraulic mechanism includes: a first filter (1), a first fixed-displacement pump (3), a first relief valve (5), a first pressure gauge (7), a first spring check valve (9), a first solenoid directional valve (11), a first flow dividing and collecting valve (13), a second flow dividing and collecting valve (14), a first hydraulic cylinder (17) and a second hydraulic cylinder (18).

5. The dual-channel synchronous hydraulic feeding system according to claim 1 or 2, characterized in that: The B-side hydraulic mechanism includes a second filter (2), a second fixed-displacement pump (4), a second relief valve (6), a second pressure gauge (8), a second spring check valve (10), a second solenoid directional valve (12), a third flow dividing and collecting valve (15), a fourth flow dividing and collecting valve (16), a third hydraulic cylinder (19) and a fourth hydraulic cylinder (20).

6. The dual-channel synchronous hydraulic feeding system according to claim 1, characterized in that: There are rollers on both sides in front and behind the movable oil cylinder frame (114). The front rollers are used for walking on the ground, and the rear pipe rollers walk in the guide grooves of the base (115).

7. The dual-channel synchronous hydraulic feeding system according to claim 6, characterized in that: The base (115) is fixedly installed on the ground. Guide grooves are provided on both sides of the base (115). The rollers on both sides of the tail of the bracket of the movable oil cylinder frame (114) move in the guide grooves, and the horizontal direction of the oil cylinder is ensured not to deviate by guiding the oil cylinder bracket.

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