An editable collaborative control electro-hydraulic tooling hydraulic system

Abstract

The present invention provides an editable collaborative control electro-hydraulic tooling hydraulic system, which includes an electric control hydraulic power source, a valve island actuator and a signal processing unit. The electric control hydraulic power source includes an electro-hydraulic proportional control module, a pump motor group, an oil tank and hydraulic accessories; the electro-hydraulic proportional control module includes an electromagnetic proportional reversing valve, a fixed-differential pressure reducing valve, an accumulator, a pressure gauge, a check valve, a high-pressure oil filter, a safety valve; the pump motor group includes a motor and an oil pump; the oil tank and hydraulic accessories include an oil tank, an oil return filter and a cooler. The valve island actuator includes a PA electromagnetic reversing valve, a PB electromagnetic reversing valve and an oil cylinder. The signal processing unit includes a switching power supply and an electromagnetic proportional reversing valve proportional amplifier. The present invention controls the electromagnetic reversing valve and the electromagnetic proportional reversing valve through the signal processing unit, realizes the editable collaborative control of the oil cylinders of each valve island actuator, completes the action logic and attitude collaborative operation of the hydraulic actuator, and reserves a signal interface suitable for an automated assembly platform controlled by a computer program.

Description

Technical Field

[0001] The present invention belongs to the technical field of non-standard processing and installation of building steel structures, and particularly relates to an editable collaborative control electro-hydraulic tooling hydraulic system. Background Art

[0002] At present, hydraulic synchronization technology has been widely used in the field of building steel structure installation. In the processing and manufacturing of steel structures, hydraulic technology is mainly used for the group welding of large regular components. However, for some spatial three-dimensional node components with more angles and the angles not in the same plane, the group welding tooling is more complex. When driving the tooling through electro-hydraulic, the actions of the actuators are often related to the actual processing technology of various components to be processed, and require relatively complex action logic and attitude coordination. Therefore, it is necessary to design a hydraulic system with editability and strong coordination suitable for the complex operation control of electro-hydraulic tooling. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] The present invention provides an editable collaborative control electro-hydraulic tooling hydraulic system to solve the technical problems of the existing electro-hydraulic tooling for steel structure assembly having a single logic, weak coordination, being able to process only specific components, and having low utilization rate.

[0005] (2) Technical Solutions

[0006] To solve the above technical problems, the present invention provides an editable collaborative control electro-hydraulic tooling hydraulic system, which includes an electric control hydraulic power source, a valve island actuator, and a signal processing unit; the valve island actuator is connected to the electric control hydraulic power source through a hydraulic hose, and the signal processing unit is respectively connected to the electric control hydraulic power source and the valve island actuator through control cables; wherein,

[0007] The electric control hydraulic power source is skid-mounted and integrated, including a pump motor set, an electro-hydraulic proportional control module, an oil tank, and hydraulic accessories, which are connected to each other through hydraulic hoses or rigid pipe rows; wherein,

[0008] The pump motor set includes two oil pumps and two motors; wherein, the inlet ports of the first oil pump and the second oil pump are respectively connected to the oil tank, and after the first motor and the second motor are energized, they respectively drive the first oil pump and the second oil pump to rotate, converting electrical energy into hydraulic energy;

[0009] The electro-hydraulic proportional control module is an oil circuit block, which integrates three electro-magnetic proportional directional control valves, three fixed-differential pressure reducing valves, three accumulators, four pressure gauges, a safety valve, a high-pressure oil filter and five one-way valves. Among them, the oil outlets of the first oil pump and the second oil pump are respectively connected to the oil inlets of the first one-way valve and the second one-way valve. The oil outlets of the first one-way valve and the second one-way valve are each divided into three paths. The first path is connected to the first pressure gauge serving as the system pressure gauge. The second path is merged into the system return oil circuit after passing through the safety valve and leads to the oil tank. The third path is connected to the oil inlet of the high-pressure oil filter. The oil outlet of the high-pressure oil filter is divided into three paths after passing through the third one-way valve. The first path is connected to the first accumulator and the second pressure gauge. The second path is connected to the valve island actuator after passing through the first pressure reducing valve and the first electro-magnetic proportional directional control valve in sequence. The third path is respectively connected to the oil inlets of the fourth one-way valve and the fifth one-way valve. The third one-way valve, the first accumulator, the second pressure gauge, the first fixed-differential pressure reducing valve and the first electro-magnetic proportional directional control valve jointly form the first group of electro-hydraulic proportional control oil circuits. The fourth one-way valve, the second accumulator, the third pressure gauge, the second fixed-differential pressure reducing valve and the second electro-magnetic proportional directional control valve jointly form the second group of electro-hydraulic proportional control oil circuits. The connection mode is the same as that of the first group of electro-hydraulic proportional control oil circuits and is used to expand the control of the second group of valve island actuators. The fifth one-way valve, the third accumulator, the fourth pressure gauge, the third fixed-differential pressure reducing valve and the third electro-magnetic proportional directional control valve jointly form the third group of electro-hydraulic proportional control oil circuits. The connection mode is the same as that of the first group of electro-hydraulic proportional control oil circuits and is used to expand the control of the third group of valve island actuators. The connection modes of the second group of electro-hydraulic proportional control oil circuits and the third group of electro-hydraulic proportional control oil circuits with the valve island actuator are the same as those of the first group of electro-hydraulic proportional control oil circuits with the valve island actuator.

[0010] The oil tank and hydraulic accessories include a cooler, an oil tank and a return oil filter. Among them, the cooler is connected between the overflow ports of the first oil pump and the second oil pump and the oil tank, and plays a role in heat dissipation when the oil pumps are running. The return oil filter is connected between the main return oil circuit of the system and the oil tank, and plays a role in filtering when the system is running.

[0011] The valve island actuator includes six PA electro-magnetic directional control valves, six PB electro-magnetic directional control valves, six left oil cylinders and six right oil cylinders. Among them, the oil inlets of the six PA electro-magnetic directional control valves are jointly connected to the first oil outlet of the first electro-magnetic proportional directional control valve. The first oil outlets of the six PA electro-magnetic directional control valves are respectively connected to the extending oil cavities of the six left oil cylinders, and the second oil outlets are respectively connected to the extending oil cavities of the six right oil cylinders. The oil inlets of the six PB electro-magnetic directional control valves are jointly connected to the second oil outlet of the first electro-magnetic proportional directional control valve. The first oil outlets of the six PB electro-magnetic directional control valves are respectively connected to the retracting oil cavities of the six left oil cylinders, and the second oil outlets are respectively connected to the retracting oil cavities of the six right oil cylinders.

[0012] Each electromagnetic proportional directional valve, PA electromagnetic directional valve, and PB electromagnetic directional valve are respectively connected to the signal processing unit through control cables; each left cylinder and right cylinder are respectively connected to the signal processing unit through feedback signal cables;

[0013] The signal processing unit includes an AC220V / DC24V switching power supply and valve-mounted proportional amplifiers for three electromagnetic proportional directional valves; among them, the switching power supply inputs AC220V and outputs DC24V; each valve-mounted proportional amplifier has a terminal A connected to the 24V+ terminal block of the switching power supply, a terminal B connected to the 0 terminal block of the switching power supply, a reserved enable signal terminal C, 4-20mA command input terminals D and E, a feedback signal terminal F for the cylinder to be controlled, a proportional amplifier ground terminal G, and terminals X and Y between which there is an electromagnet connected; the first control button of the first PA electromagnetic directional valve has two normally open contacts, one of the normally open contacts is connected to the 24V+ terminal block of the switching power supply at one end and to one pole of the electromagnet of the first PA electromagnetic directional valve at the other end, and the other pole of the electromagnet is connected to the 0 terminal block of the switching power supply; the other normally open contact is connected to the feedback signal terminal F of the proportional amplifier of the first electromagnetic proportional directional valve at one end and to one pole of the first left cylinder sensor of the first left cylinder at the other end, and the other pole of the first left cylinder sensor is connected to the 0 terminal block of the switching power supply;

[0014] The first control button of the first PB electromagnetic directional valve has two normally open contacts, one of the normally open contacts is connected to the 24V+ terminal block of the switching power supply at one end and to one pole of the electromagnet of the first PB electromagnetic directional valve at the other end, and the other pole of the electromagnet is connected to the 0 terminal block of the switching power supply; the other normally open contact is connected to the feedback signal terminal F of the proportional amplifier of the first electromagnetic proportional directional valve at one end and to one pole of the first right cylinder sensor of the first right cylinder at the other end, and the other pole of the first right cylinder sensor is connected to the 0 terminal block of the switching power supply; the control of other PA electromagnetic directional valves and PB electromagnetic directional valves is set in the same way.

[0015] (III) Beneficial effects

[0016] The present invention provides an editable collaborative control electro-hydraulic tooling hydraulic system, which includes an electric control hydraulic power source, a valve island actuator, and a signal processing unit. The electric control hydraulic power source includes an electro-hydraulic proportional control module, a pump motor group, an oil tank, and hydraulic accessories; the electro-hydraulic proportional control module includes an electromagnetic proportional directional valve, a fixed differential pressure reducing valve, an accumulator, a pressure gauge, a check valve, a high-pressure oil filter, and a safety valve; the pump motor group includes a motor and an oil pump; the oil tank and hydraulic accessories include an oil tank, an oil return filter, and a cooler. The valve island actuator includes a PA electromagnetic directional valve, a PB electromagnetic directional valve, and an oil cylinder. The signal processing unit includes a switching power supply and an electromagnetic proportional directional valve proportional amplifier. The present invention controls the electromagnetic directional valve and the electromagnetic proportional directional valve through the signal processing unit, realizes the editable collaborative control of the oil cylinders of each valve island actuator, completes the action logic and attitude collaborative operation of the hydraulic actuator, and reserves signal interfaces suitable for an automated assembly platform controlled by a computer program. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the hydraulic schematic diagram of the electro-hydraulic tooling hydraulic system according to the embodiment of the present invention;

[0018] Figure 2 is the signal wiring diagram of the electro-hydraulic tooling hydraulic system according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the objectives, contents, and advantages of the present invention clearer, the following further describes the specific embodiments of the present invention in detail with reference to the drawings and embodiments.

[0020] This embodiment provides an editable collaborative control electro-hydraulic tooling hydraulic system, and its hydraulic principle is as Figure 1 shown. The electro-hydraulic tooling hydraulic system includes an electric control hydraulic power source, a valve island actuator, and a signal processing unit. Among them, the valve island actuator is connected to the electric control hydraulic power source through a hydraulic hose, and the signal processing unit is respectively connected to the electric control hydraulic power source and the valve island actuator through control cables.

[0021] The electric control hydraulic power source is skid-mounted and integrated, including a pump motor group, an electro-hydraulic proportional control module, an oil tank, and hydraulic accessories, which are connected to each other through hydraulic hoses or hard pipe rows.

[0022] The pump motor group includes an oil pump (including a first oil pump 3.1 and a second oil pump 3.2), and a motor (including a first motor 2.1 and a second motor 2.2). Among them, the inlet ports of the first oil pump 3.1 and the second oil pump 3.2 are respectively connected to the oil tank 1, and after the first motor 2.1 and the second motor 2.2 are powered on, they respectively drive the first oil pump 3.1 and the second oil pump 3.2 to rotate, converting electrical energy into hydraulic energy.

[0023] The electro-hydraulic proportional control module is an oil circuit block, which integrates electromagnetic proportional directional valves (including the first electromagnetic proportional directional valve 12.1, the second electromagnetic proportional directional valve 12.2, and the third electromagnetic proportional directional valve 12.3), fixed differential pressure reducing valves (including the first fixed differential pressure reducing valve 11.1, the second fixed differential pressure reducing valve 11.2, and the third fixed differential pressure reducing valve 11.3), accumulators (including the first accumulator 10.1, the second accumulator 10.2, and the third accumulator 10.3), pressure gauges (including the first pressure gauge 9.1, the second pressure gauge 9.2, the third pressure gauge 9.3, and the fourth pressure gauge 9.4), a safety valve 8, a high-pressure oil filter 7, and check valves (including the first check valve 5.1, the second check valve 5.2, the third check valve 5.3, the fourth check valve 5.4, and the fifth check valve 5.5).

[0024] The oil outlets of the first oil pump 3.1 and the second oil pump 3.2 are respectively connected to the oil inlets of the first check valve 5.1 and the second check valve 5.2 of the electro-hydraulic proportional control module. The oil outlets of the first check valve 5.1 and the second check valve 5.2 are each divided into three paths. The first path is connected to the first pressure gauge 9.1 serving as the system pressure gauge. The second path is merged with the system return oil circuit through the safety valve 8 and leads to the oil tank 1. The third path is connected to the oil inlet of the high-pressure oil filter 7.

[0025] The oil outlet of the high-pressure oil filter 7 is divided into three paths after passing through the third check valve 5.3. The first path is connected to the first accumulator 10.1 and the second pressure gauge 9.2. The second path passes through the first pressure reducing valve 11.1 and the first electromagnetic proportional directional valve 12.1 in sequence and then is connected to the valve island actuator. The third path is respectively connected to the oil inlets of the fourth check valve 5.4 and the fifth check valve 5.5. The third check valve 5.3, the first accumulator 10.1, the second pressure gauge 9.2, the first fixed differential pressure reducing valve 11.1, and the first electromagnetic proportional directional valve 12.1 jointly form the first group of electro-hydraulic proportional control oil circuits.

[0026] The fourth check valve 5.4, the second accumulator 10.2, the third pressure gauge 9.3, the second fixed differential pressure reducing valve 11.2, and the second electromagnetic proportional directional valve 12.2 jointly form the second group of electro-hydraulic proportional control oil circuits. The connection method is the same as that of the first group of electro-hydraulic proportional control oil circuits, serving as an extended control for the second group of valve island actuators. The fifth check valve 5.5, the third accumulator 10.3, the fourth pressure gauge 9.4, the third fixed differential pressure reducing valve 11.3, and the third electromagnetic proportional directional valve 12.3 jointly form the third group of electro-hydraulic proportional control oil circuits. The connection method is the same as that of the first group of electro-hydraulic proportional control oil circuits, serving as an extended control for the third group of valve island actuators. The connection methods of the second group of electro-hydraulic proportional control oil circuits and the third group of electro-hydraulic proportional control oil circuits with the valve island actuators are the same as that of the first group of electro-hydraulic proportional control oil circuits with the valve island actuators.

[0027] The fuel tank and hydraulic accessories include a cooler 6, a fuel tank 1, and a return oil filter 4. Among them, the cooler 6 is connected between the overflow ports of the first oil pump 3.1 and the second oil pump 3.2 and the fuel tank 1, and plays a role in heat dissipation when the oil pump is running. The return oil filter 4 is connected between the main return oil circuit of the system and the fuel tank 1, and plays a filtering role when the system is running.

[0028] The valve island actuator includes PA solenoid directional control valves (including the first PA solenoid directional control valve 13.1, the second PA solenoid directional control valve 13.2, the third PA solenoid directional control valve 13.3, the fourth PA solenoid directional control valve 13.4, the fifth PA solenoid directional control valve 13.5, and the sixth PA solenoid directional control valve 13.6), PB solenoid directional control valves (including the first PB solenoid directional control valve 14.1, the second PB solenoid directional control valve 14.2, the third PB solenoid directional control valve 14.3, the fourth PB solenoid directional control valve 14.4, the fifth PB solenoid directional control valve 14.5, and the sixth PB solenoid directional control valve 14.6), left cylinders (including the first left cylinder A1, the second left cylinder A2, the third left cylinder A3, the fourth left cylinder A4, the fifth left cylinder A5, and the sixth left cylinder A6), and right cylinders (including the first right cylinder B1, the second right cylinder B2, the third right cylinder B3, the fourth right cylinder B4, the fifth right cylinder B5, and the sixth right cylinder B6)

[0029] Among them, the inlet ports of the six PA solenoid directional control valves 13.1, 13.2, 13.3, 13.4, 13.5, and 13.6 are jointly connected to the first oil outlet of the first electro-hydraulic proportional directional control valve 12.1. The first oil outlets of the six PA solenoid directional control valves 13.1, 13.2, 13.3, 13.4, 13.5, and 13.6 are respectively connected to the extending oil chambers of the six left cylinders A1, A2, A3, A4, A5, and A6, and the second oil outlets are respectively connected to the extending oil chambers of the six right cylinders B1, B2, B3, B4, B5, and B6. The inlet ports of the six PB solenoid directional control valves 14.1, 14.2, 14.3, 14.4, 14.5, and 14.6 are jointly connected to the second oil outlet of the first electro-hydraulic proportional directional control valve 12.1. The first oil outlets of the six PB solenoid directional control valves 14.1, 14.2, 14.3, 14.4, 14.5, and 14.6 are respectively connected to the retracting oil chambers of the six left cylinders A1, A2, A3, A4, A5, and A6, and the second oil outlets are respectively connected to the retracting oil chambers of the six right cylinders B1, B2, B3, B4, B5, and B6.

[0030] Each electro-hydraulic proportional directional control valve, PA solenoid directional control valve, and PB solenoid directional control valve is respectively connected to the signal processing unit through a control cable. Each left cylinder and right cylinder is respectively connected to the signal processing unit through a feedback signal cable.

[0031] As Figure 2As shown, the signal processing unit includes an AC220V / DC24V switching power supply and the valve-mounted proportional amplifiers of three electromagnetic proportional directional valves 12.1, 12.2, and 12.3. Among them, the switching power supply inputs AC220V and outputs DC24V. The terminals A (including A1, A2, and A3) of each valve-mounted proportional amplifier are all connected to the 24V+ terminal block of the switching power supply, and the terminals B (including B1, B2, and B3) of each valve-mounted proportional amplifier are all connected to the 0 terminal block of the switching power supply. An electromagnet is connected between the terminal X and the terminal Y (including X1 and Y1, X2 and Y2, X3 and Y3) of each valve-mounted proportional amplifier. The terminals C (including C1, C2, and C3) of each valve-mounted proportional amplifier are the enabling signal interfaces reserved for the proportional amplifier, the terminals D (including D1, D2, and D3), and the terminals E (including E1, E2, and E3) are the 4-20mA command input interfaces of the proportional amplifier, the terminals F (including F1, F2, and F3) are the feedback signal terminals of the oil cylinder controlled by the proportional amplifier, and the terminal G is the ground of the proportional amplifier.

[0032] The first control button SB13.1 of the first PA electromagnetic directional valve 13.1 has two normally open contacts. One normally open contact has one end connected to the 24V+ terminal block of the switching power supply and the other end connected to one pole of the electromagnet DT13.1 of the first PA electromagnetic directional valve 13.1, and the other pole of the electromagnet DT13.1 is connected to the 0 terminal block of the switching power supply; the other normally open contact has one end connected to the feedback signal interface terminal F1 of the proportional amplifier of the first electromagnetic proportional directional valve 12.1 and the other end connected to one pole of the first left oil cylinder sensor FKA1 of the first left oil cylinder A1, and the other pole of the first left oil cylinder sensor FKA1 is connected to the 0 terminal block of the switching power supply.

[0033] The first control button SB14.1 of the first PB electromagnetic directional valve 14.1 has two normally open contacts. One normally open contact has one end connected to the 24V+ terminal block of the switching power supply and the other end connected to one pole of the electromagnet DT14.1 of the first PB electromagnetic directional valve 14.1, and the other pole of the electromagnet DT14.1 is connected to the 0 terminal block of the switching power supply; the other normally open contact has one end connected to the feedback signal interface terminal F1 of the proportional amplifier of the first electromagnetic proportional directional valve 12.1 and the other end connected to one pole of the first right oil cylinder sensor FKB1 of the first right oil cylinder B1, and the other pole of the first right oil cylinder sensor FKB1 is connected to the 0 terminal block of the switching power supply.

[0034] SB13.2 and SB14.2 are respectively the second control buttons of the second PA electromagnetic directional control valve 13.2 and the second PB electromagnetic directional control valve 14.2. The second left oil cylinder A2 and the second right oil cylinder B2 controlled by the second PA electromagnetic directional control valve 13.2 and the second PB electromagnetic directional control valve 14.2 are respectively equipped with a second left oil cylinder sensor FKA2 and a second right oil cylinder sensor FKB2. The other PA electromagnetic directional control valves 13.3, 13.4, 13.5, 13.6 and PB electromagnetic directional control valves 14.3, 14.4, 14.5, 14.6 are controlled in the same way.

[0035] The electro-hydraulic tooling hydraulic system of the present invention controls the reciprocating commutation and speed regulation of the oil cylinder through the electro-magnetic proportional directional control valve; through the signal processing unit, the opening and closing combinations of multiple groups of PA electromagnetic directional control valves and PB electromagnetic directional control valves are carried out to realize the editable action sequence of the left and right oil cylinders; through the interaction between the electro-magnetic proportional directional control valve and the fixed-differential pressure reducing valve, the action amplitude of the left and right oil cylinders can be edited; through the signal processing unit, the combination of multiple groups of electro-magnetic proportional directional control valves and multiple groups of PA electromagnetic directional control valves and PB electromagnetic directional control valves is carried out to realize the overall coordinated control of the electro-hydraulic tooling. The specific working principle is as follows:

[0036] After the system is started, the oil pump in the pump motor group pumps the hydraulic oil in the fuel tank into the electro-hydraulic proportional control module through the one-way valve under the drive of the motor; when the pump pressure is abnormally too high, the safety valve overflows; the hydraulic oil enters or discharges from the valve island actuator through the control of the electro-magnetic proportional directional control valve, and during the process, the fixed-differential pressure reducing valve provides pressure compensation for the valve port.

[0037] Taking the first left oil cylinder A1 and the first right oil cylinder B1 in the valve island actuator as an example, when the first PA electromagnetic directional control valve 13.1 and the first PB electromagnetic directional control valve 14.1 are both de-energized or energized, the first left oil cylinder A1 and the first right oil cylinder B1 are locked; when the first PA electromagnetic directional control valve 13.1 is de-energized and the first PB electromagnetic directional control valve 14.1 is energized, the first left oil cylinder A1 is controllable and the first right oil cylinder B1 is uncontrollable; when the first PA electromagnetic directional control valve 13.1 is energized and the first PB electromagnetic directional control valve 14.1 is de-energized, the first left oil cylinder A1 is uncontrollable and the first right oil cylinder B1 is controllable; the logic of other left and right oil cylinders is the same. By combining the digital quantity signals through the computer program to control each PA electromagnetic directional control valve and PB electromagnetic directional control valve, and combining the analog quantity signals to control each electro-magnetic proportional directional control valve, and further controlling the piston elongation of the unlocked oil cylinder, it is possible to realize the locking of all oil cylinders, the control of a single oil cylinder, and the editing and coordination of the actions of multiple oil cylinders.

[0038] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. An editable collaborative control electro-hydraulic tooling hydraulic system, characterized in that, The electro-hydraulic tooling hydraulic system includes an electric control hydraulic power source, a valve island actuator, and a signal processing unit; the valve island actuator is connected to the electric control hydraulic power source through a hydraulic hose, and the signal processing unit is respectively connected to the electric control hydraulic power source and the valve island actuator through control cables; among them, The electric control hydraulic power source is skid-mounted and integrated, including a pump-motor unit, an electro-hydraulic proportional control module, a fuel tank, and hydraulic accessories, which are connected to each other through hydraulic hoses or hard pipe rows; among them, The pump-motor unit includes two oil pumps and two motors; among them, the inlet ports of the first oil pump and the second oil pump are respectively connected to the fuel tank, and after the first motor and the second motor are energized, they respectively drive the first oil pump and the second oil pump to rotate, converting electrical energy into hydraulic energy; The electro-hydraulic proportional control module is an oil circuit block, on which three electromagnetic proportional directional valves, three fixed-differential pressure reducing valves, three accumulators, four pressure gauges, a safety valve, a high-pressure oil filter, and five one-way valves are integrated; among them, the outlet ports of the first oil pump and the second oil pump are respectively connected to the inlet ports of the first one-way valve and the second one-way valve; the outlet ports of the first one-way valve and the second one-way valve are each divided into three paths. The first path is connected to the first pressure gauge as the system pressure gauge, the second path is merged with the system return oil circuit through the safety valve and leads to the fuel tank, and the third path is connected to the inlet port of the high-pressure oil filter; the outlet of the high-pressure oil filter is divided into three paths after passing through the third one-way valve. The first path is connected to the first accumulator and the second pressure gauge, the second path is sequentially connected to the valve island actuator through the first fixed-differential pressure reducing valve and the first electromagnetic proportional directional valve, and the third path is respectively connected to the inlet ports of the fourth one-way valve and the fifth one-way valve; the third one-way valve, the first accumulator, the second pressure gauge, the first fixed-differential pressure reducing valve, and the first electromagnetic proportional directional valve together form the first group of electro-hydraulic proportional control oil circuits; the fourth one-way valve, the second accumulator, the third pressure gauge, the second fixed-differential pressure reducing valve, and the second electromagnetic proportional directional valve together form the second group of electro-hydraulic proportional control oil circuits, and the connection method is the same as that of the first group of electro-hydraulic proportional control oil circuits, serving as an extended control for the second group of valve island actuators; the fifth one-way valve, the third accumulator, the fourth pressure gauge, the third fixed-differential pressure reducing valve, and the third electromagnetic proportional directional valve together form the third group of electro-hydraulic proportional control oil circuits, and the connection method is the same as that of the first group of electro-hydraulic proportional control oil circuits, serving as an extended control for the third group of valve island actuators; the connection methods of the second group of electro-hydraulic proportional control oil circuits and the third group of electro-hydraulic proportional control oil circuits with the valve island actuator are the same as the connection method of the first group of electro-hydraulic proportional control oil circuits with the valve island actuator; The fuel tank and hydraulic accessories include a cooler, a fuel tank, and a return oil filter; among them, the cooler is connected between the overflow ports of the first oil pump and the second oil pump and the fuel tank, and plays a heat dissipation role when the oil pump is running; the return oil filter is connected between the main return oil circuit of the system and the fuel tank, and plays a filtering role when the system is running; The valve island actuator includes six PA electromagnetic directional control valves, six PB electromagnetic directional control valves, six left oil cylinders and six right oil cylinders; among them, the oil inlets of the six PA electromagnetic directional control valves are jointly connected to the first oil outlet of the first electro-hydraulic proportional directional control valve; the first oil outlets of the six PA electromagnetic directional control valves are respectively connected to the extending oil chambers of the six left oil cylinders, and the second oil outlets are respectively connected to the extending oil chambers of the six right oil cylinders; the oil inlets of the six PB electromagnetic directional control valves are jointly connected to the second oil outlet of the first electro-hydraulic proportional directional control valve; the first oil outlets of the six PB electromagnetic directional control valves are respectively connected to the retracting oil chambers of the six left oil cylinders, and the second oil outlets are respectively connected to the retracting oil chambers of the six right oil cylinders; Each electro-hydraulic proportional directional control valve, PA electromagnetic directional control valve, and PB electromagnetic directional control valve is respectively connected to the signal processing unit through a control cable; each left oil cylinder and right oil cylinder is respectively connected to the signal processing unit through a feedback signal cable; The signal processing unit includes an AC220V / DC24V switching power supply and valve-mounted proportional amplifiers for three electro-hydraulic proportional directional control valves; among them, the switching power supply inputs AC220V and outputs DC24V; each valve-mounted proportional amplifier has a terminal A connected to the 24V+ terminal block of the switching power supply, a terminal B connected to the 0 terminal block of the switching power supply, a reserved enable signal terminal C, 4-20mA command input terminals D and E, a feedback signal terminal F for the oil cylinder to be controlled, a proportional amplifier ground terminal G, and terminals X and Y with an electromagnet connected between them; the first control button of the first PA electromagnetic directional control valve has two normally open contacts, one of the normally open contacts is connected to the 24V+ terminal block of the switching power supply at one end and one pole of the electromagnet of the first PA electromagnetic directional control valve at the other end, and the other pole of the electromagnet is connected to the 0 terminal block of the switching power supply; the other normally open contact is connected to the feedback signal terminal F of the proportional amplifier of the first electro-hydraulic proportional directional control valve at one end and one pole of the first left oil cylinder sensor of the first left oil cylinder at the other end, and the other pole of the first left oil cylinder sensor is connected to the 0 terminal block of the switching power supply; The first control button of the first PB electromagnetic directional control valve has two normally open contacts, one of the normally open contacts is connected to the 24V+ terminal block of the switching power supply at one end and one pole of the electromagnet of the first PB electromagnetic directional control valve at the other end, and the other pole of the electromagnet is connected to the 0 terminal block of the switching power supply; the other normally open contact is connected to the feedback signal terminal F of the proportional amplifier of the first electro-hydraulic proportional directional control valve at one end and one pole of the first right oil cylinder sensor of the first right oil cylinder at the other end, and the other pole of the first right oil cylinder sensor is connected to the 0 terminal block of the switching power supply; the controls of other PA electromagnetic directional control valves and PB electromagnetic directional control valves are set in the same way.

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