Hydraulic linkage actuator for precise control of gate opening

Abstract

The utility model discloses gate opening precision control hydraulic linkage executing mechanism relates to gate technical field, include: fixed frame, hydraulic cylinder main part, first oil pipe and second oil pipe, one end of first oil pipe is equipped with first double -outlet synchronous shunt current -collecting valve, one end of second oil pipe is equipped with second double -outlet synchronous shunt current -collecting valve. Through the internal thread rotation of piston main body in piston rod, the rotation circle number of piston main body is detected to the range measurement of piston rod by rotary encoder, realizes the direct high accuracy measurement of opening, and the upper side of gate main body is hinged to the upper side of gate main body through first hinging piece, and the upper side of gate main body is hinged to the upper side of gate main body through second hinging piece, and the sliding direction of gate main body is adaptively adjusted, and the oil amount in the inside of hydraulic cylinder main part is ensured to be equal through first double -outlet synchronous shunt current -collecting valve and second double -outlet synchronous shunt current -collecting valve, and the problem of gate deflection jamming is solved thoroughly.

Description

Technical Field

[0001] This utility model relates to the field of gate technology, and in particular to a hydraulic linkage actuator for precise control of gate opening. Background Technology

[0002] Gates are key facilities in water conservancy projects used to control water flow, regulate water level, and intercept or discharge water. They are widely used in reservoirs, hydropower stations, irrigation canals, flood control dikes, and urban drainage systems. Gate opening refers to the vertical distance from the bottom stop of the gate to the bottom sill. It is a key parameter for measuring the degree of gate opening and directly affects the flow rate, velocity, and water level regulation effect of water passing through the gate. The core of the hydraulic linkage actuator for precise gate opening control lies in the coordination of the hydraulic system with sensors and control algorithms to achieve precise displacement adjustment during the gate opening and closing process.

[0003] However, existing publicly available hydraulic linkage actuators for opening control still have some shortcomings in practical applications that need to be improved, such as:

[0004] 1. Traditional hydraulic cylinders are affected by oil pressure fluctuations, internal leakage, and mechanical clearances, resulting in large gate positioning errors, making it difficult to meet the needs of precise water regulation and power generation. The opening control accuracy is low, and the opening is indirectly measured by external sensors. These sensors are susceptible to water vapor corrosion and mechanical vibration damage, leading to data failure or the need for frequent calibration. The opening feedback is not intuitive.

[0005] 2. When driven by dual hydraulic cylinders, uneven load or differences in oil circuits can cause asynchronous displacement of the two cylinders, leading to gate skewness, jamming, and poor synchronicity. Therefore, those skilled in the art have provided a hydraulic linkage actuator for precise control of gate opening to solve the problems mentioned in the background art. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a hydraulic linkage actuator for precise control of gate opening, thus solving the problems mentioned in the background section.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic linkage actuator for precise control of gate opening, comprising: a fixed frame, a hydraulic cylinder body, a first oil guide pipe, and a second oil guide pipe. The hydraulic cylinder body is located at both ends of the fixed frame. The first oil guide pipe is located on one side of the hydraulic cylinder body, and the second oil guide pipe is located on one side of the hydraulic cylinder body. A first dual-outlet synchronous diversion and combining valve is installed at one end of the first oil guide pipe, and a second dual-outlet synchronous diversion and combining valve is installed at one end of the second oil guide pipe. An electromagnetic directional valve is installed at the lower end of the first and second dual-outlet synchronous diversion and combining valves. An oil delivery component is installed at the lower end of the electromagnetic directional valve. A first hinge is provided on the lower side of the hydraulic cylinder body, a balance bar is provided at the lower end of the hydraulic cylinder body, a second hinge is provided on the lower side of the balance bar, and the gate body is provided on the lower side of the second hinge.

[0008] As a further technical solution of this utility model, the hydraulic cylinder body includes a cylinder body, a piston rod is provided inside the cylinder body, a piston body is provided at the upper end of the cylinder body, a sealing shell is provided on the upper side of the cylinder body, a rotary encoder is installed inside the sealing shell, a first hydraulic oil inlet / outlet pipe is provided at the upper end of one side of the cylinder body, a second hydraulic oil inlet / outlet pipe is provided at the lower end of one side of the cylinder body, a bidirectional hydraulic lock is installed at one end of the first hydraulic oil inlet / outlet pipe, a first throttling speed control valve is provided at the upper end of the bidirectional hydraulic lock, and a second throttling speed control valve is provided at the lower end of the bidirectional hydraulic lock.

[0009] As a further technical solution of this utility model, the oil conveying component includes an oil tank, an oil suction pipe is provided at one end of the oil tank, an oil pump is installed on the upper side of the oil tank, an oil outlet pipe is provided at the upper end of the oil pump, and a circulation pipe is provided at the other end of the oil tank.

[0010] As a further technical solution of this utility model, two hydraulic cylinder bodies are provided. The upper ends of the two hydraulic cylinder bodies are fixed to the outer end of the fixing frame, and the lower ends of the two hydraulic cylinder bodies are hinged to the upper side of the gate body through the first hinge. The outer end of the balance rod is fixed to the outer side of the piston rod, and the balance rod is hinged to the upper side of the gate body through the second hinge.

[0011] As a further technical solution of this utility model, the upper end of the piston body rotates to the upper end position of the cylinder body, the piston body is threaded to rotate to the inner position of the piston rod, the output shaft of the rotary encoder is fixedly connected to the upper end of the piston body, the piston body slides to the inner position of the cylinder body, and the lower end of the piston rod slides to the lower end position of the cylinder body.

[0012] As a further technical solution of this utility model, the upper end of the cylinder body is connected to the bidirectional hydraulic lock through a first hydraulic oil inlet / outlet pipe, and the lower end of the cylinder body is connected to the bidirectional hydraulic lock through a second hydraulic oil inlet / outlet pipe. The bidirectional hydraulic lock is connected to the first guide oil pipe through a first throttle speed control valve, and the bidirectional hydraulic lock is connected to the second guide oil pipe through a second throttle speed control valve. The first guide oil pipe is connected to the solenoid directional valve through a first dual-outlet synchronous diverting and combining valve, and the second guide oil pipe is connected to the solenoid directional valve through a second dual-outlet synchronous diverting and combining valve. The solenoid directional valve is connected to the oil delivery component.

[0013] As a further technical solution of this utility model, the lower end of the oil suction pipe is located at the lower end of the inside of the oil tank, the output end of the oil suction pipe is connected to the input end of the oil pump, the output end of the oil pump is connected to the input end of the oil outlet pipe, the output end of the circulation pipe is connected to the input end of the oil tank, the input end of the circulation pipe is connected to the electromagnetic reversing valve, and the output end of the oil outlet pipe is connected to the electromagnetic reversing valve.

[0014] This utility model provides a hydraulic linkage actuator for precise control of gate opening, which has the following advantages compared with the prior art:

[0015] 1. The gate opening precision control hydraulic linkage actuator in this design uses the piston body to rotate on the internal thread of the piston rod. The rotary encoder detects the number of rotations of the piston body and measures the piston rod's travel, achieving direct and high-precision measurement of the opening. Furthermore, the rotary encoder is located inside the sealed housing, avoiding the risk of damage.

[0016] 2. The gate opening precision control hydraulic linkage actuator in this design has a hydraulic cylinder body hinged to the upper side of the gate body via a first hinge, and a balance bar hinged to the upper side of the gate body via a second hinge. This allows for adaptive adjustment of the sliding direction of the gate body. The first and second dual-outlet synchronous diversion and combination valves ensure equal oil volume inside the hydraulic cylinder body, completely solving the gate skew and jamming problem and extending the equipment's lifespan. Attached Figure Description

[0017] Figure 1 A schematic diagram of the hydraulic linkage actuator for precise control of gate opening;

[0018] Figure 2 A perspective view of the main body of the hydraulic cylinder in the hydraulic linkage actuator for precise control of gate opening;

[0019] Figure 3 A schematic diagram of the oil delivery component in the hydraulic linkage actuator for precise control of gate opening.

[0020] In the diagram: 1. Fixed frame; 2. Hydraulic cylinder body; 3. First hinge; 4. Balance bar; 5. Second hinge; 6. First oil guide pipe; 7. Second oil guide pipe; 8. First dual-outlet synchronous diverting and combining valve; 9. Second dual-outlet synchronous diverting and combining valve; 10. Solenoid directional valve; 11. Oil delivery component; 12. Gate body; 13. Cylinder body; 14. Piston rod; 15. Piston body; 16. Sealing shell; 17. Rotary encoder; 18. First hydraulic oil inlet / outlet pipe; 19. Second hydraulic oil inlet / outlet pipe; 20. Two-way hydraulic lock; 21. First throttle speed control valve; 22. Second throttle speed control valve; 23. Oil tank; 24. Oil suction pipe; 25. Oil pump; 26. Oil outlet pipe; 27. Circulation pipe. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3This utility model provides a technical solution for a hydraulic linkage actuator for precise control of gate opening: It includes a fixed frame 1, a hydraulic cylinder body 2, a first oil guide pipe 6, and a second oil guide pipe 7. The hydraulic cylinder body 2 is located at both ends of the fixed frame 1. The first oil guide pipe 6 and the second oil guide pipe 7 are located on one side of the hydraulic cylinder body 2. A first dual-outlet synchronous diversion and combining valve 8 is installed at one end of the first oil guide pipe 6, and a second dual-outlet synchronous diversion and combining valve 9 is installed at one end of the second oil guide pipe 7. A solenoid directional valve 10 is installed at the lower ends of the first and second dual-outlet synchronous diversion and combining valves 8 and 9. An oil delivery component 11 is installed at the lower end of the solenoid directional valve 10. A first hinge is provided on the lower side of the hydraulic cylinder body 2. The lower end of the hydraulic cylinder body 2 is provided with a balance bar 4, and a second hinge 5 is provided on the lower side of the balance bar 4. A gate body 12 is provided on the lower side of the second hinge 5. The hydraulic cylinder body 2 includes a cylinder body 13, inside which a piston rod 14 is provided. A piston body 15 is provided at the upper end of the cylinder body 13. A sealing shell 16 is provided on the upper side of the cylinder body 13, and a rotary encoder 17 is installed inside the sealing shell 16. A first hydraulic oil inlet / outlet pipe 18 is provided at the upper end of one side of the cylinder body 13, and a second hydraulic oil inlet / outlet pipe 19 is provided at the lower end of one side of the cylinder body 13. A two-way hydraulic lock 20 is installed at one end of the first hydraulic oil inlet / outlet pipe 18, and a first throttle speed control valve 21 is provided at the upper end of the two-way hydraulic lock 20. A second throttling speed control valve 22 is provided at the lower end. Two hydraulic cylinder bodies 2 are provided, with the upper ends of the two hydraulic cylinder bodies 2 fixed to the outer end of the fixing frame 1. The lower ends of the two hydraulic cylinder bodies 2 are hinged to the upper side of the gate body 12 through the first hinge 3. The outer end of the balance bar 4 is fixed to the outer side of the piston rod 14. The balance bar 4 is hinged to the upper side of the gate body 12 through the second hinge 5. The upper end of the piston body 15 rotates to the upper end of the cylinder body 13, and the piston body 15 rotates threadedly to the inner position of the piston rod 14. The output shaft of the rotary encoder 17 is fixedly connected to the upper end of the piston body 15. The piston body 15 slides to the inner position of the cylinder body 13, and the lower end of the piston rod 14 slides to the lower position of the cylinder body 13. At this location, the upper end of the cylinder body 13 is connected to the bidirectional hydraulic lock 20 through the first hydraulic oil inlet / outlet pipe 18, and the lower end of the cylinder body 13 is connected to the bidirectional hydraulic lock 20 through the second hydraulic oil inlet / outlet pipe 19. The bidirectional hydraulic lock 20 is connected to the first guide oil pipe 6 through the first throttle speed control valve 21, and the bidirectional hydraulic lock 20 is connected to the second guide oil pipe 7 through the second throttle speed control valve 22. The first guide oil pipe 6 is connected to the solenoid directional valve 10 through the first dual-outlet synchronous diverting and combining valve 8, and the second guide oil pipe 7 is connected to the solenoid directional valve 10 through the second dual-outlet synchronous diverting and combining valve 9. The solenoid directional valve 10 is connected to the oil delivery component 11. First, install the gate opening precision control hydraulic linkage actuator to the operating position. Then, when it is necessary to close the gate body 12...The oil conveying component 11 operates to draw internal hydraulic oil, which enters the interior of the solenoid directional valve 10. The hydraulic oil inside the solenoid directional valve 10 is introduced into the interior of the first guide pipe 6 through the first dual-outlet synchronous diverting and combining valve 8. The hydraulic oil inside the first guide pipe 6 is introduced into the upper end of the cylinder body 13 through the first throttle speed regulating valve 21, the two-way hydraulic lock 20, and the first hydraulic oil inlet / outlet pipe 18. The piston body 15 slides inside the cylinder body 13 under the pressure of the hydraulic oil, and the piston rod 14 slides at the lower end of the cylinder body 13. The cylinder body 13 rotates on the upper side of the gate body 12 through the first hinge 3, and the balance bar 4 rotates on the gate body 12 through the second hinge 5. The upper side of cylinder 12 rotates to adaptively adjust the verticality of the gate body 12. The piston body 15 rotates internally within the piston rod 14. The rotary encoder 17 calculates the opening degree of the gate body 12 based on the number of rotations of the piston body 15. The lubricating oil at the lower end of cylinder 13 is introduced into the interior of the bidirectional hydraulic lock 20 through the second hydraulic oil inlet / outlet pipe 19. The hydraulic oil inside the bidirectional hydraulic lock 20 is introduced into the interior of the second guide oil pipe 7 through the second throttle speed control valve 22. The hydraulic oil inside the second guide oil pipe 7 circulates back into the oil delivery component 11 through the second dual-outlet synchronous diversion and collection valve 9 and the solenoid reversing valve 10. When it is necessary to open the gate body 12, the solenoid reversing valve 10 activates the electromagnetic reversing valve. The valve 10 operates to adjust the direction of hydraulic oil flow, and the oil delivery component 11 operates to draw in the internal hydraulic oil. The hydraulic oil enters the solenoid directional valve 10. The hydraulic oil inside the solenoid directional valve 10 is introduced into the second guide pipe 7 through the second dual-outlet synchronous diverting and combining valve 9. The hydraulic oil inside the second guide pipe 7 is introduced into the lower end of the cylinder body 13 through the second throttle speed regulating valve 22, the two-way hydraulic lock 20, and the second hydraulic oil inlet and outlet pipe 19. The piston body 15 slides inside the cylinder body 13 under the pressure of the hydraulic oil, and the piston rod 14 slides at the lower end of the cylinder body 13. The cylinder body 13 rotates on the upper side of the gate body 12 through the first hinge 3, balancing. Rod 4 rotates on the upper side of gate body 12 via second hinge 5, adaptively adjusting the verticality of gate body 12. Piston body 15 rotates internally within piston rod 14. Rotary encoder 17 calculates the opening degree of gate body 12 based on the number of rotations of piston body 15. Lubricating oil at the upper end of cylinder 13 is introduced into the interior of bidirectional hydraulic lock 20 through first hydraulic oil inlet / outlet pipe 18. Hydraulic oil inside bidirectional hydraulic lock 20 is introduced into the interior of first guide oil pipe 6 through first throttle speed control valve 21. Hydraulic oil inside first guide oil pipe 6 circulates back into oil delivery component 11 through first dual-outlet synchronous diversion and collection valve 8 and solenoid directional valve 10.

[0023] like Figure 1 , 3As shown, the oil conveying component 11 includes an oil tank 23. An oil suction pipe 24 is provided at one end of the oil tank 23. An oil pump 25 is installed on the upper side of the oil tank 23. An oil outlet pipe 26 is provided at the upper end of the oil pump 25. A circulation pipe 27 is provided at the other end of the oil tank 23. The lower end of the oil suction pipe 24 is located at the lower end of the interior of the oil tank 23. The output end of the oil suction pipe 24 is connected to the input end of the oil pump 25, and the output end of the oil pump 25 is connected to the input end of the oil outlet pipe 26. The output end of the circulation pipe 27 is connected to the input end of the oil tank 23, and the input end of the circulation pipe 27 is connected to the solenoid directional valve 10. The output end of the oil outlet pipe 26 is connected to the solenoid directional valve 10. When it is necessary to close the gate body 12, the oil pump 25 operates to draw hydraulic oil from the inside of the oil tank 23 through the oil extraction pipe 24. The hydraulic oil enters the inside of the solenoid directional valve 10 through the oil outlet pipe 26. The hydraulic oil inside the solenoid directional valve 10 flows through the first double outlet... The hydraulic oil is introduced into the first guide pipe 6 by the flow divider and combiner valve 8. The hydraulic oil inside the first guide pipe 6 is introduced into the hydraulic cylinder body 2. The hydraulic oil inside the hydraulic cylinder body 2 is circulated back to the oil tank 23 through the circulation pipe 27. When the gate body 12 needs to be opened, the solenoid directional valve 10 operates to adjust the direction of hydraulic oil inflow and outflow. The oil pump 25 operates to draw hydraulic oil from the oil tank 23 through the oil extraction pipe 24. The hydraulic oil enters the solenoid directional valve 10 through the oil outlet pipe 26. The hydraulic oil inside the solenoid directional valve 10 is introduced into the second guide pipe 7 through the second double-outlet synchronous flow divider and combiner valve 9. The hydraulic oil inside the second guide pipe 7 is introduced into the hydraulic cylinder body 2. The hydraulic oil inside the hydraulic cylinder body 2 is introduced into the first guide pipe 6. The hydraulic oil inside the first guide pipe 6 is circulated back to the oil tank 23 through the first double-outlet synchronous flow divider and combiner valve 8, the solenoid directional valve 10, and the circulation pipe 27.

[0024] The working principle of this utility model is as follows: First, the hydraulic linkage actuator for precise control of gate opening is installed in the usage position. Then, when the gate body 12 needs to be closed, the oil pump 25 operates to draw hydraulic oil from the oil tank 23 through the oil extraction pipe 24. The hydraulic oil enters the solenoid directional valve 10 through the oil outlet pipe 26. The hydraulic oil inside the solenoid directional valve 10 is introduced into the first guide pipe 6 through the first dual-outlet synchronous diversion and collection valve 8. The hydraulic oil inside the first guide pipe 6 is introduced into the upper end of the cylinder body 13 through the first throttle speed regulating valve 21, the two-way hydraulic lock 20, and the first hydraulic oil inlet and outlet pipe 18. The piston body 15 slides inside the cylinder body 13 under the pressure of the hydraulic oil, and the piston rod 14 slides inside the cylinder body 13. The lower end slides, and the cylinder 13 rotates on the upper side of the gate body 12 via the first hinge 3. The balance bar 4 rotates on the upper side of the gate body 12 via the second hinge 5, adaptively adjusting the verticality of the gate body 12. The piston body 15 rotates on the internal thread of the piston rod 14. The rotary encoder 17 calculates the opening degree of the gate body 12 based on the number of rotations of the piston body 15. The lubricating oil at the lower end of the cylinder 13 is introduced into the interior of the two-way hydraulic lock 20 through the second hydraulic oil inlet / outlet pipe 19. The hydraulic oil inside the two-way hydraulic lock 20 is introduced into the interior of the second guide pipe 7 through the second throttle speed regulating valve 22. The hydraulic oil inside the second guide pipe 7 is introduced into the interior of the second double-outlet synchronous diversion and collection valve 9, the solenoid reversing valve 10, and the circulation pipe. When the hydraulic oil returns to the inside of the oil tank 23 and the gate body 12 needs to be opened, the solenoid directional valve 10 operates to adjust the direction of hydraulic oil inflow and outflow. The oil pump 25 operates to draw hydraulic oil from the inside of the oil tank 23 through the oil extraction pipe 24. The hydraulic oil enters the inside of the solenoid directional valve 10 through the oil outlet pipe 26. The hydraulic oil inside the solenoid directional valve 10 is introduced into the inside of the second guide pipe 7 through the second dual-outlet synchronous diverting and combining valve 9. The hydraulic oil inside the second guide pipe 7 is introduced into the lower end of the cylinder body 13 through the second throttle speed regulating valve 22, the two-way hydraulic lock 20 and the second hydraulic oil inlet and outlet pipe 19. The piston body 15 slides inside the cylinder body 13 under the compression of the hydraulic oil, and the piston rod 14 slides at the lower end of the cylinder body 13. The cylinder body 13 passes through the second throttle speed regulating valve 22, the two-way hydraulic lock 20 and the second hydraulic oil inlet and outlet pipe 19. A hinge 3 rotates on the upper side of the gate body 12, and a balance bar 4 rotates on the upper side of the gate body 12 through a second hinge 5 to adaptively adjust the verticality of the gate body 12. The piston body 15 rotates internally in the piston rod 14. The rotary encoder 17 calculates the opening degree of the gate body 12 based on the number of rotations of the piston body 15. The lubricating oil at the upper end of the cylinder 13 is introduced into the interior of the bidirectional hydraulic lock 20 through the first hydraulic oil inlet / outlet pipe 18. The hydraulic oil inside the bidirectional hydraulic lock 20 is introduced into the interior of the first guide oil pipe 6 through the first throttle speed regulating valve 21. The hydraulic oil inside the first guide oil pipe 6 is circulated back into the oil tank 23 through the first dual-outlet synchronous diversion and collection valve 8, the electromagnetic reversing valve 10, and the circulation pipe 27.

[0025] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A hydraulic linkage actuator for precise control of gate opening, characterized in that, It includes a fixed frame (1), a hydraulic cylinder body (2), a first oil guide pipe (6) and a second oil guide pipe (7). The hydraulic cylinder body (2) is located at both ends of the fixed frame (1), the first oil guide pipe (6) is located on one side of the hydraulic cylinder body (2), and the second oil guide pipe (7) is located on one side of the hydraulic cylinder body (2). A first dual-outlet synchronous diversion and combination valve (8) is installed at one end of the first oil guide pipe (6), and a second dual-outlet synchronous diversion and combination valve (9) is installed at one end of the second oil guide pipe (7). A solenoid directional valve (10) is installed at the lower end of the first dual-outlet synchronous diversion and combination valve (8) and the second dual-outlet synchronous diversion and combination valve (9). An oil delivery component (11) is installed at the lower end of the solenoid directional valve (10). A first hinge (3) is provided on the lower side of the hydraulic cylinder body (2). A balance bar (4) is provided at the lower end of the hydraulic cylinder body (2). A second hinge (5) is provided on the lower side of the balance bar (4). A gate body (12) is provided on the lower side of the second hinge (5).

2. The gate opening precision control hydraulic linkage actuator according to claim 1, characterized in that, The hydraulic cylinder body (2) includes a cylinder body (13), a piston rod (14) is provided inside the cylinder body (13), a piston body (15) is provided at the upper end of the cylinder body (13), a sealing shell (16) is provided on the upper side of the cylinder body (13), and a rotary encoder (17) is installed inside the sealing shell (16). A first hydraulic oil inlet / outlet pipe (18) is provided at the upper end of one side of the cylinder body (13), and a second hydraulic oil inlet / outlet pipe (19) is provided at the lower end of one side of the cylinder body (13). A two-way hydraulic lock (20) is installed at one end of the first hydraulic oil inlet / outlet pipe (18). A first throttle speed control valve (21) is provided at the upper end of the two-way hydraulic lock (20), and a second throttle speed control valve (22) is provided at the lower end of the two-way hydraulic lock (20).

3. The gate opening precision control hydraulic linkage actuator according to claim 1, characterized in that, The oil conveying component (11) includes an oil tank (23), one end of which is provided with an oil extraction pipe (24), an oil pump (25) is installed on the upper side of the oil tank (23), an oil outlet pipe (26) is provided at the upper end of the oil pump (25), and a circulation pipe (27) is provided at the other end of the oil tank (23).

4. The gate opening precision control hydraulic linkage actuator according to claim 1, characterized in that, Two hydraulic cylinder bodies (2) are provided. The upper ends of the two hydraulic cylinder bodies (2) are fixed to the outer end of the fixing frame (1). The lower ends of the two hydraulic cylinder bodies (2) are hinged to the upper side of the gate body (12) through the first hinge (3). The outer end of the balance rod (4) is fixed to the outer side of the piston rod (14). The balance rod (4) is hinged to the upper side of the gate body (12) through the second hinge (5).

5. The gate opening precision control hydraulic linkage actuator according to claim 2, characterized in that, The upper end of the piston body (15) rotates to the upper end position of the cylinder (13), the piston body (15) is threaded to rotate to the inner position of the piston rod (14), the output shaft of the rotary encoder (17) is fixedly connected to the upper end of the piston body (15), the piston body (15) slides to the inner position of the cylinder (13), and the lower end of the piston rod (14) slides to the lower end position of the cylinder (13).

6. The gate opening precision control hydraulic linkage actuator according to claim 2, characterized in that, The upper end of the cylinder (13) is connected to the bidirectional hydraulic lock (20) through the first hydraulic oil inlet / outlet pipe (18), and the lower end of the cylinder (13) is connected to the bidirectional hydraulic lock (20) through the second hydraulic oil inlet / outlet pipe (19). The bidirectional hydraulic lock (20) is connected to the first guide oil pipe (6) through the first throttle speed control valve (21), and the bidirectional hydraulic lock (20) is connected to the second guide oil pipe (7) through the second throttle speed control valve (22). The first guide oil pipe (6) is connected to the electromagnetic directional valve (10) through the first dual-outlet synchronous diversion and combination valve (8), and the second guide oil pipe (7) is connected to the electromagnetic directional valve (10) through the second dual-outlet synchronous diversion and combination valve (9). The electromagnetic directional valve (10) is connected to the oil delivery component (11).

7. The gate opening precision control hydraulic linkage actuator according to claim 3, characterized in that, The lower end of the oil extraction pipe (24) is located at the lower end of the inside of the oil tank (23). The output end of the oil extraction pipe (24) is connected to the input end of the oil pump (25). The output end of the oil pump (25) is connected to the input end of the oil outlet pipe (26). The output end of the circulation pipe (27) is connected to the input end of the oil tank (23). The input end of the circulation pipe (27) is connected to the electromagnetic reversing valve (10). The output end of the oil outlet pipe (26) is connected to the electromagnetic reversing valve (10).

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