Hydraulic system for intelligent half-portal material taking machine and operation method

Abstract

The invention relates to the field of hydraulic systems for raw material semi-portal reclaimers, and discloses an intelligent hydraulic system for a semi-portal reclaimer, which comprises an energy accumulator control module and an oil pump control and execution module, the energy accumulator control module comprises a variable pump, an electromagnetic overflow valve, a one-way valve, two energy accumulator sets, a P1 pressure sensor, a two-position electromagnetic valve, a hydraulic control one-way valve and a pressure reducing valve. A Y02 electromagnet is arranged on the right side of the two-position electromagnetic valve. A hydraulic system is divided into an energy accumulator control module and an oil pump control and execution module, through cooperative work of core components such as a variable pump, an energy accumulator set and a proportional reversing valve, the dynamic pressure supplementing function of an energy accumulator and double-oil-cylinder independent control are innovatively achieved, the pressure is monitored in real time through a P1 pressure sensor, the displacement of the pump is automatically adjusted, and the pressure compensation function is achieved. Energy consumption is reduced when the system pressure reaches the upper limit, pressure is supplemented quickly when the pressure is insufficient, and compared with a traditional hydraulic system, energy is saved more efficiently.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic systems for raw material semi-gantry reclaimers, and in particular to a hydraulic system and an operating method for an intelligent semi-gantry reclaimer. Background Art

[0002] Semi-gantry reclaimers are widely used in C-shaped raw material yards in mines, ports, steel mills, and other enterprises. They handle and transport bulk materials such as ore, ore fines, and coke. They are large, highly efficient mobile machines for continuous bulk material handling. They consist of a semi-gantry frame, scraper arm, hoist mechanism, travel mechanism, hydraulic system, and lubrication system. They can be operated automatically by a human operator or manually by a human operator. With the continuous development of semi-gantry reclaimers, intelligent unmanned and remote operation are now possible. However, during intelligent reclaiming, if the hydraulic system of the reclaimer arm encounters a problem, the machine must be shut down for repair. This long period of unmanned operation means the specific fault symptoms and location are unclear, requiring maintenance personnel to identify and resolve the problem before automatic reclaiming can resume, impacting the entire unit's production. Hydraulic system failures, coupled with a lack of on-site confirmation and timely resolution during unmanned reclaiming, can lead to serious accidents such as reclaimer arm chain breakage and scraper deformation, severely impacting production efficiency. Therefore, upgrading existing technology and developing a hydraulic system and operating method for intelligent semi-gantry reclaimers are crucial. Summary of the Invention

[0003] (1) Technical problems solved

[0004] In view of the deficiencies in the prior art, the present invention provides a hydraulic system and an operating method for an intelligent semi-gantry reclaimer, which solves the problems raised in the above-mentioned background technology.

[0005] (2) Technical solution

[0006] 1. To achieve the above objectives, the present invention provides the following technical solutions: A hydraulic system for an intelligent semi-gantry reclaimer, comprising an accumulator control module and an oil pump control and execution module. The accumulator control module includes a variable displacement pump, an electromagnetic relief valve, a check valve, two accumulator groups, a P1 pressure sensor, a two-position solenoid valve, a hydraulically controlled check valve, and a pressure reducing valve. A Y02 electromagnet is provided on the right side of the two-position solenoid valve.

[0007] The first oil cylinder, the second oil cylinder, the first three-position proportional reversing valve, the first double hydraulically controlled one-way valve, the second three-position proportional reversing valve, the second double hydraulically controlled one-way valve, the P2 pressure sensor, the P3 pressure sensor, the P4 pressure sensor, and the P5 pressure sensor constitute an oil pump control module. The first three-position proportional reversing valve is provided with a Y03 electromagnet and a Y04 electromagnet, and the second three-position proportional reversing valve is provided with a Y05 electromagnet and a Y06 electromagnet;

[0008] The inclinometer, T1 displacement sensor, T2 displacement sensor and electric ball valve constitute the execution control module. The T1 displacement sensor and T2 displacement sensor are respectively located at the bottom of the first oil cylinder and the second oil cylinder;

[0009] The oil pump control and execution module includes an oil pump control module, an execution control module, a first relief valve, a second relief valve, and a filter.

[0010] Preferably, the oil outlet of the variable pump is sequentially connected to a one-way valve and a hydraulically controlled one-way valve through pipelines, and the outlets of the hydraulically controlled one-way valve are respectively connected to the inlets of the two accumulator groups and the pressure reducing valve.

[0011] Preferably, the outlet of the pressure reducing valve is connected to the inlet of the first three-position proportional reversing valve and the second three-position proportional reversing valve through a pipeline, the outlet of the first three-position proportional reversing valve is connected to the first oil cylinder through a first double-hydraulic-controlled one-way valve, and the outlet of the second three-position proportional reversing valve is connected to the second oil cylinder through a second double-hydraulic-controlled one-way valve.

[0012] Preferably, the P2 pressure sensor and the P3 pressure sensor are arranged in the pipeline of the first oil cylinder, and the P4 pressure sensor and the P5 pressure sensor are arranged in the pipeline of the second oil cylinder.

[0013] Preferably, the set pressure of the electromagnetic overflow valve is 16 MPa, and the electromagnetic overflow valve is provided with a Y01 electromagnet.

[0014] A hydraulic operation method for an intelligent semi-gantry reclaimer includes the following operating steps:

[0015] S1. Check whether the solenoid overflow valve, two-position solenoid valve, and electric ball valve are in their initial positions or normally closed. At the same time, check the connection status of the P1 pressure sensor, P2 pressure sensor, P3 pressure sensor, P4 pressure sensor, P5 pressure sensor, inclinometer, and T1 displacement sensor and T2 displacement sensor to ensure that there is no damage and the signal transmission is normal;

[0016] S2. Start the variable pump. The Y01 solenoid of the electromagnetic relief valve is energized to open it. The system pressure oil is supplied to the accumulator group and the pressure reducing valve through the one-way valve and the hydraulically controlled one-way valve. When the accumulator group is pressurized to the upper limit set by the P1 pressure sensor, the variable pump automatically adjusts the displacement to maintain a stable system pressure.

[0017] S3. Based on operational requirements, energize the Y03 or Y04 solenoid of the first three-position proportional directional valve to drive the first cylinder to extend and retract through the pressure reducing valve, the first three-position proportional directional valve, and the first double hydraulically controlled one-way valve. Similarly, control the Y05 or Y06 solenoid of the second three-position proportional directional valve to drive the second cylinder. During this operation, the P2, P3, P4, and P5 pressure sensors monitor the pressures of the two cylinders in real time and provide feedback to the control system.

[0018] S4, the inclinometer monitors the scraper arm tilt angle in real time and feeds it back to the control system. When it exceeds the range, it automatically adjusts the angles of the first and second three-position proportional reversing valves. The T1 and T2 displacement sensors monitor the displacement of the oil cylinder, and the system calculates the chain elongation based on it. When it exceeds the set value, it alarms and prompts maintenance.

[0019] S5. After the operation is completed, first cut off the power supply of the electromagnets on the first and second three-position proportional reversing valves to reset the valve core to the middle position and stop the cylinder action; then cut off the power supply of the variable pump, and the Y01 electromagnet of the electromagnetic overflow valve loses power and closes to relieve pressure; finally, close the electric ball valve to prevent oil backflow.

[0020] (3) Beneficial effects

[0021] The present invention provides a hydraulic system and operating method for an intelligent semi-gantry reclaimer, which has the following features:

[0022] Beneficial effects:

[0023] (1) The present invention divides the hydraulic system into an accumulator control module and an oil pump control and execution module. Through the coordinated work of core components such as the variable pump, the accumulator group, and the proportional reversing valve, the present invention innovatively realizes the dynamic pressure replenishment function of the accumulator and the independent control of the dual oil cylinders (the variable pump and the accumulator group cooperate). The pressure is monitored in real time by the P1 pressure sensor, and the pump displacement is automatically adjusted. When the system pressure reaches the upper limit (such as the accumulator group is pressurized to 11MPa), energy consumption is reduced, and pressure is quickly replenished when the pressure is insufficient (dropped to 8MPa). Compared with the traditional hydraulic system, it is more energy-efficient and efficient. The first oil cylinder and the second oil cylinder are independently adjusted by their respective three-position proportional reversing valves and double hydraulic control one-way valves. Combined with the inclinometer and displacement sensor (T1 / T2), the angle and displacement of the scraper arm at different material levels (high, medium, and low) can be accurately controlled (such as adjusting the oil cylinder pressure through the P3 / P5 pressure sensor feedback to keep the scraper arm balanced). This solves the problem that the traditional single-loop control cannot cope with overload or complex working conditions, and significantly improves the flexibility and operation accuracy of the system.

[0024] (2) In the present invention, a complete monitoring system is constructed by using components such as pressure sensors (P1-P5), inclinometers, and displacement sensors (T1, T2). The P2-P5 pressure sensors monitor the cylinder pipeline pressure in real time. When the pressure exceeds 15MPa, the overflow valve automatically relieves the pressure (the electromagnetic overflow valve is set to a safety pressure of 16MPa) to prevent the system from being overloaded and damaged. At the same time, the accumulator group provides stable pressure through the hydraulically controlled one-way valve and the pressure reducing valve to avoid pressure fluctuations that cause the chain to loosen or the scraper to deform; the inclinometer monitors the scraper arm inclination angle in real time and automatically adjusts the proportional reversing valve angle when it exceeds the range. The T1 displacement sensor and the T2 displacement sensor monitor the cylinder displacement and calculate the chain elongation. When the threshold is exceeded, an alarm is issued to prompt maintenance, thereby achieving early warning of faults and reducing downtime and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the hydraulic principle of the present invention;

[0026] Figure 2 For the present invention Figure 1 Partial diagram of the oil pump control and execution module Figure 1 ;

[0027] Figure 3 For the present invention Figure 1 Schematic diagram of the accumulator control module;

[0028] Figure 4 For the present invention Figure 1 Partial diagram of the oil pump control and execution module Figure 2 ;

[0029] Figure 5 Schematic diagram of the control flow of the present invention.

[0030] Figure: 1. Accumulator control module; 2. Oil pump control and execution module; 3. Y01 solenoid; 4. Variable displacement pump; 5. Solenoid relief valve; 6. Check valve; 7. Filter; 8. First relief valve; 9. First oil cylinder; 10. T1 displacement sensor; 11. P2 pressure sensor; 12. P3 pressure sensor; 13. Second relief valve; 14. Second oil cylinder; 15. T2 displacement sensor; 16. P4 pressure sensor; 17. P5 pressure sensor. 18. Inclinometer; 19. Accumulator group; 20. P1 pressure sensor; 21. Two-position solenoid valve; 22. Y02 solenoid; 23. Hydraulic-controlled non-return valve; 24. Pressure reducing valve; 25. First and third-position proportional directional control valve; 26. First double-hydraulic-controlled non-return valve; 27. Second and third-position proportional directional control valve; 28. Second double-hydraulic-controlled non-return valve; 29. ​​Y03 solenoid; 30. Y04 solenoid; 31. Y05 solenoid; 32. Y06 solenoid; 33. Electric ball valve. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 1-5 As shown, the present invention provides a technical solution: a hydraulic system for an intelligent semi-gantry reclaimer, comprising an accumulator control module 1 and an oil pump control and execution module 2. The accumulator control module 1 comprises a variable pump 4, an electromagnetic overflow valve 5, a one-way valve 6, two accumulator groups 19, a P1 pressure sensor 20, a two-position solenoid valve 21, a hydraulically controlled one-way valve 23, and a pressure reducing valve 24. A Y02 electromagnet 22 is provided on the right side of the two-position solenoid valve 21.

[0033] The first oil cylinder 9, the second oil cylinder 14, the first three-position proportional reversing valve 25, the first double hydraulically controlled one-way valve 26, the second three-position proportional reversing valve 27, the second double hydraulically controlled one-way valve 28, the P2 pressure sensor 11, the P3 pressure sensor 12, the P4 pressure sensor 16, and the P5 pressure sensor 17 constitute an oil pump control module. The first three-position proportional reversing valve 25 is provided with a Y03 electromagnet 29 and a Y04 electromagnet 30, and the second three-position proportional reversing valve 27 is provided with a Y05 electromagnet 31 and a Y06 electromagnet 32;

[0034] The inclinometer 18, T1 displacement sensor 10, T2 displacement sensor 15, and electric ball valve 33 constitute an execution control module. The T1 displacement sensor 10 and T2 displacement sensor 15 are located at the bottom of the first oil cylinder 9 and the second oil cylinder 14 respectively;

[0035] The oil pump control and execution module 2 includes an oil pump control module, an execution control module, a first relief valve 8, a second relief valve 13, and a filter 7.

[0036] By dividing the hydraulic system into an accumulator control module 1 and an oil pump control and execution module 2, and through the coordinated work of core components such as the variable pump 4, the accumulator group 19, and the first and third proportional reversing valves 25, the dynamic pressure replenishment function of the accumulator and the independent control of the dual oil cylinders (the variable pump 4 cooperates with the accumulator group 19) are innovatively realized. The pressure is monitored in real time through the P1 pressure sensor 20, and the pump displacement is automatically adjusted. When the system pressure reaches the upper limit (such as the accumulator group 19 is charged to 11MPa), energy consumption is reduced, and when the pressure is insufficient (dropped to 8MPa), the pressure is quickly replenished. pressure, which is more energy-efficient and efficient than traditional hydraulic systems; the first cylinder 9 and the second cylinder 14 are independently adjusted by their own three-position proportional reversing valves and double hydraulic-controlled one-way valves. Combined with the inclinometer 18 and displacement sensor (T1 / T2), the angle and displacement of the scraper arm at different material levels (high, medium and low) can be accurately controlled (such as adjusting the cylinder pressure through feedback from the P3 pressure sensor 12 / P5 pressure sensor 17 to keep the scraper arm balanced), which solves the problem that traditional single-loop control cannot cope with eccentric loads or complex working conditions, and significantly improves the flexibility and operating accuracy of the system.

[0037] Furthermore, the oil outlet of the variable pump 4 is connected to a one-way valve 6 and a hydraulically controlled one-way valve 23 in sequence through a pipeline. The outlets of the hydraulically controlled one-way valve 23 are respectively connected to the inlets of the two accumulator groups 19 and the pressure reducing valve 24. The one-way valve 6 can prevent the oil from flowing back, effectively protecting the variable pump 4. The one-way conduction characteristic of the hydraulically controlled one-way valve 23 is utilized to ensure the pressure stability of the accumulator group 19 during charging. At the same time, the high-pressure oil is respectively transported to the accumulator group 19 for storage and standby and to the pressure reducing valve 24 for use in the execution circuit after being reduced in pressure, thereby realizing the orderly distribution and efficient utilization of hydraulic power, which not only ensures the reliability of the system pressure, but also provides a stable power source for the cylinder action.

[0038] Furthermore, the outlet of the pressure reducing valve 24 is connected to the inlet of the first three-position proportional reversing valve 25 and the second three-position proportional reversing valve 27 through a pipeline. The outlet of the first three-position proportional reversing valve 25 is connected to the first oil cylinder 9 through the first double hydraulically controlled one-way valve 26, and the outlet of the second three-position proportional reversing valve 27 is connected to the second oil cylinder 14 through the second double hydraulically controlled one-way valve 28, so that the pressure reducing valve 24 can provide stable pressure for the first three-position proportional reversing valve 25 and the second three-position proportional reversing valve 27 to ensure their normal operation. The first three-position proportional reversing valve 25 and the second three-position proportional reversing valve 27 can respectively accurately control the actions of the first oil cylinder 9 and the second oil cylinder 14 to achieve different working requirements, while the first double hydraulically controlled one-way valve 26 and the second double hydraulically controlled one-way valve 28 can prevent the oil in the first oil cylinder 9 and the second oil cylinder 14 from flowing back, ensuring the stability and reliability of the oil cylinder. This connection method can effectively improve the control accuracy and working efficiency of the hydraulic system and meet the various operating requirements of the intelligent semi-gantry material reclaimer.

[0039] Furthermore, the P2 pressure sensor 11 and the P3 pressure sensor 12 are arranged in the pipeline of the first cylinder 9, and the P4 pressure sensor 16 and the P5 pressure sensor 17 are arranged in the pipeline of the second cylinder 14. They can accurately monitor the pressure changes of the oil inlet and return pipelines of the first cylinder 9 and the second cylinder 14 in real time, and feed back the pressure data to the control system. They can dynamically adjust the opening of the first and third proportional directional valves 25 and the second and third proportional directional valves 27 to match different operating loads (such as the pressure requirements of high, medium and low material levels), and promptly detect abnormal conditions such as pipeline blockage, internal leakage of the first cylinder 9 and the second cylinder 14 (such as sudden pressure changes or over-limits), thereby realizing comprehensive monitoring of the operating status of the hydraulic system, ensuring the stability and safety of the scraper arm movement, and providing real-time data support for fault diagnosis and maintenance.

[0040] Furthermore, the electromagnetic overflow valve 5 is set to a pressure of 16 MPa, and a Y01 electromagnet 3 is provided on the electromagnetic overflow valve 5, so that the system pressure can be effectively controlled within a safe range. When the system pressure reaches 16 MPa, the electromagnetic overflow valve 5 opens to relieve pressure under the action of the Y01 electromagnet 3, preventing the system pressure from being too high and causing damage to the equipment, thereby ensuring the stable operation and safety of the entire hydraulic system.

[0041] A hydraulic operation method for an intelligent semi-gantry reclaimer includes the following operating steps:

[0042] S1. Check the initial status and sensor connections: Check whether the solenoid overflow valve 5, the two-position solenoid valve 21, and the electric ball valve 33 are in their initial positions or normally closed. Verify that the piping connection between the P1 pressure sensor 20 and the accumulator group 19 is sealed. Also check whether the oil inlet and return pipes between the P2 pressure sensor 11, the P3 pressure sensor 12, the P4 pressure sensor 16, and the P5 pressure sensor 17 and the first and second oil cylinders 9 and 14 are securely connected. Ensure that the inclinometer 18, the T1 displacement sensor 10, and the T2 displacement sensor 15 are properly connected, free of damage, and that signal transmission is normal.

[0043] S2. Start the variable pump and charge the accumulator: Start the variable pump 4. The Y01 solenoid 3 of the electromagnetic relief valve 5 is energized to open it. The system pressure oil is supplied to the accumulator group 19 and the pressure reducing valve 24 through the one-way valve 6 and the hydraulically controlled one-way valve 23. When the accumulator group 19 is charged to the upper limit set by the P1 pressure sensor 20, the variable pump 4 automatically adjusts the displacement to maintain a stable system pressure. (When the set upper limit rises to 11 MPa, the variable pump 4 automatically adjusts the displacement to the minimum flow rate to maintain a stable system pressure. When the pressure drops to 8 MPa, the variable pump automatically restarts to replenish the pressure.)

[0044] S3. Oil cylinder action control and pressure monitoring: According to the operation requirements, the Y03 electromagnet 29 or Y04 electromagnet 30 of the first three-position proportional reversing valve 25 is energized to drive the first oil cylinder 9 to achieve telescopic action through the pressure reducing valve 24, the first three-position proportional reversing valve 25 and the first double hydraulically controlled one-way valve 26; similarly, the Y05 electromagnet 31 or Y06 electromagnet 32 ​​of the second three-position proportional reversing valve 27 is controlled to drive the second oil cylinder 14 to act; during the action, the P2 pressure sensor 11 and the P3 pressure sensor 12 monitor the inlet and return oil pressure of the first oil cylinder 9 in real time, and the P4 pressure sensor 16 and the P5 pressure sensor 17 monitor the inlet and return oil pressure of the second oil cylinder 14, and refer to the pressure thresholds of high, medium and low material levels in the manual (for example, the high material level pressure needs to be maintained at 8MPa, and the relief valve is relieved when it exceeds 15MPa), and feedback is fed back to the control system to dynamically adjust the opening of the proportional reversing valve;

[0045] S4. Inclination and displacement monitoring: The inclinometer 18 monitors the scraper arm inclination angle in real time and feeds it back to the control system. When it exceeds the range (±3°), the angles of the first and second three-position proportional reversing valves 25 and 27 are automatically adjusted. The T1 displacement sensor 10 and the T2 displacement sensor 15 monitor the displacement of the oil cylinder, based on which the system calculates the chain elongation. When the set value is exceeded, an alarm is issued and a maintenance prompt is prompted.

[0046] S5. Safety shutdown process after the operation is completed: After the operation is completed, first cut off the power supply of the electromagnets on the first and third proportional reversing valves 25 and the second and third proportional reversing valves 27 to reset the valve core to the middle position and stop the cylinder action; then cut off the power supply of the variable pump 4, and the Y01 electromagnet 3 of the electromagnetic relief valve 5 loses power and closes to relieve pressure; finally, close the electric ball valve 33 to prevent oil backflow.

[0047] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic system for an intelligent semi-gantry reclaimer, comprising an accumulator control module (1) and an oil pump control and execution module (2), characterized in that: The accumulator control module (1) comprises a variable pump (4), an electromagnetic overflow valve (5), a one-way valve (6), two accumulator groups (19), a P1 pressure sensor (20), a two-position electromagnetic valve (21), a hydraulically controlled one-way valve (23), and a pressure reducing valve (24). A Y02 electromagnet (22) is provided on the right side of the two-position electromagnetic valve (21); The first oil cylinder (9), the second oil cylinder (14), the first three-position proportional reversing valve (25), the first double hydraulically controlled one-way valve (26), the second three-position proportional reversing valve (27), the second double hydraulically controlled one-way valve (28), the P2 pressure sensor (11), the P3 pressure sensor (12), the P4 pressure sensor (16), and the P5 pressure sensor (17) constitute an oil pump control module, wherein the first three-position proportional reversing valve (25) is provided with a Y03 electromagnet (29) and a Y04 electromagnet (30), and the second three-position proportional reversing valve (27) is provided with a Y05 electromagnet (31) and a Y06 electromagnet (32); An inclinometer (18), a T1 displacement sensor (10), a T2 displacement sensor (15), and an electric ball valve (33) constitute an execution control module, wherein the T1 displacement sensor (10) and the T2 displacement sensor (15) are respectively located at the bottom of the first oil cylinder (9) and the second oil cylinder (14); The oil pump control and execution module (2) comprises an oil pump control module, an execution control module, a first overflow valve (8), a second overflow valve (13), and a filter (7).

2. The hydraulic system for an intelligent semi-gantry reclaimer according to claim 1, characterized in that: The oil outlet of the variable pump (4) is sequentially connected to a one-way valve (6) and a hydraulic one-way valve (23) through pipelines, and the outlet of the hydraulic one-way valve (23) is respectively connected to the inlets of two accumulator groups (19) and a pressure reducing valve (24).

3. The hydraulic system for an intelligent semi-gantry reclaimer according to claim 1, characterized in that: The outlet of the pressure reducing valve (24) is connected to the inlets of a first three-position proportional reversing valve (25) and a second three-position proportional reversing valve (27) through a pipeline; the outlet of the first three-position proportional reversing valve (25) is connected to the first oil cylinder (9) through a first double-hydraulic-controlled one-way valve (26); and the outlet of the second three-position proportional reversing valve (27) is connected to the second oil cylinder (14) through a second double-hydraulic-controlled one-way valve (28).

4. The hydraulic system for an intelligent semi-gantry reclaimer according to claim 1, characterized in that: The P2 pressure sensor (11) and the P3 pressure sensor (12) are arranged in the pipeline of the first oil cylinder (9), and the P4 pressure sensor (16) and the P5 pressure sensor (17) are arranged in the pipeline of the second oil cylinder (14).

5. The hydraulic system for an intelligent semi-gantry reclaimer according to claim 1, characterized in that: The electromagnetic overflow valve (5) has a set pressure of 16 MPa, and a Y01 electromagnet (3) is provided on the electromagnetic overflow valve (5).

6. A hydraulic operation method for an intelligent semi-gantry reclaimer, comprising a hydraulic system for an intelligent semi-gantry reclaimer according to any one of claims 1 to 5, characterized in that: The following steps are included: S1. Check whether the valve status of the electromagnetic overflow valve (5), the two-position electromagnetic valve (21), and the electric ball valve (33) are in the initial position or normally closed. At the same time, check the connection status of the P1 pressure sensor (20), the P2 pressure sensor (11), the P3 pressure sensor (12), the P4 pressure sensor (16), the P5 pressure sensor (17), the inclinometer (18), the T1 displacement sensor (10), and the T2 displacement sensor (15) to ensure that there is no damage and the signal transmission is normal; S2, start the variable pump (4), the Y01 electromagnet (3) of the electromagnetic overflow valve (5) is energized to open it, and the system pressure oil is supplied to the accumulator group (19) and the pressure reducing valve (24) through the one-way valve (6) and the hydraulic one-way valve (23); when the accumulator group (19) is pressurized to the upper limit value set by the P1 pressure sensor (20), the variable pump (4) automatically adjusts the displacement to maintain the system pressure stable; S3. According to the operation requirements, the Y03 electromagnet (29) or the Y04 electromagnet (30) of the first three-position proportional reversing valve (25) is energized to drive the first oil cylinder (9) to realize the telescopic action through the pressure reducing valve (24), the first three-position proportional reversing valve (25) and the first double hydraulic control one-way valve (26); similarly, the Y05 electromagnet (31) or the Y06 electromagnet (32) of the second three-position proportional reversing valve (27) is controlled to drive the second oil cylinder (14) to move; during the action, the P2 pressure sensor (11), the P3 pressure sensor (12), the P4 pressure sensor (16) and the P5 pressure sensor (17) monitor the pressure of the two oil cylinders in real time and feed back to the control system; S4, the inclinometer (18) monitors the scraper arm tilt angle in real time and feeds it back to the control system, automatically adjusting the angles of the first three-position proportional reversing valve (25) and the second three-position proportional reversing valve (27) when it exceeds the range; The T1 displacement sensor (10) and the T2 displacement sensor (15) monitor the displacement of the oil cylinder, and the system calculates the chain elongation based on the displacement. When the set value is exceeded, an alarm is issued and maintenance is prompted; S5. After the operation is completed, first cut off the power supply of the electromagnets on the first three-position proportional reversing valve (25) and the second three-position proportional reversing valve (27), so that the valve core returns to the middle position and stops the oil cylinder from moving; then cut off the power supply of the variable pump (4), and the Y01 electromagnet (3) of the electromagnetic overflow valve (5) loses power and closes to relieve pressure; finally, close the electric ball valve (33) to prevent oil backflow.

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