Insulated arm aerial platform truck hydraulic power generation control system

Abstract

The application discloses an insulated arm aerial work truck hydraulic power generation control system, which comprises a hydraulic oil tank and a multi-way valve for supplying oil to a platform valve group; the multi-way valve is placed at a lower truck rotary table position, and comprises an oil inlet P for connecting a pump source or a remaining oil supply valve group, an oil return port R for connecting the hydraulic oil tank, and a multi-way valve oil drain port T; the multi-way valve further comprises a first working position oil outlet A of a working link for supplying oil to the platform valve group, and is connected with the first platform valve group through the oil outlet A; the working link of the multi-way valve has three working positions, wherein the oil outlet of the first working position is the working link oil outlet A; the oil outlet of the second working position is the working link oil outlet B; and the working link A port and the working link B port of the third working position do not discharge oil. The application can not only better solve the self-starting problem of the platform generator when the platform storage battery is fed, but also can reduce the number of arm body internal pipelines, optimize the arm body internal pipeline arrangement, and improve the working reliability of the arm body pipelines.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic control technology for aerial work platforms, and in particular relates to a hydraulic power generation control system for an insulated boom aerial work platform. Background Technology

[0002] Insulated boom aerial work platforms are specialized aerial work platforms capable of performing live-line work, widely used in industries such as power and telecommunications. To ensure the overall insulation performance of the vehicle, the boom of an insulated boom aerial work platform typically incorporates an insulating section, the interior of which is free of metal and other conductive media. Currently, most insulated boom aerial work platforms on the market use a purely hydraulic control system. However, these platforms involve numerous movements, and the main operating position is concentrated in the platform's work bucket area. All movements of the turntable and platform must be completed from the platform's operating position. This operating method suffers from problems such as complex operation, numerous boom pipes, complex internal piping layout of the insulating section, and poor maintainability. With technological advancements and changing market demands, the control methods of insulated boom aerial work platforms are evolving towards intelligent systems. The control methods for the turntable and work bucket are shifting from purely manual to electrically controlled operation. This new control method greatly simplifies the overall piping layout, solves the complex piping layout problems caused by the numerous movements of the work bucket platform, and improves the overall aesthetics of the vehicle. As insulated boom aerial work platforms transition to intelligent electronic control, operation becomes simpler. However, the inability of the platform's electronic components to draw power directly from the chassis battery raises concerns about the power consumption of the platform's multi-way valves, electrical operation buttons, and detection components. To address this, some models incorporate batteries to power the platform's components. However, these batteries have limited range, requiring frequent replacement and recharging, and some are bulky, occupying space on the platform's control panel. This often results in operational disruptions and production delays due to forgotten battery charging. To solve the platform's own power needs, a storage battery is placed inside the platform, employing a hydraulic generator to provide power to the platform's valve assembly and electrical components. The hydraulic generator uses hydraulic oil to drive a hydraulic motor, which in turn powers a generator. The generated electricity is stored in the storage battery, which powers the platform's components. Simultaneously, the charging method of the hydraulic generator is controlled by monitoring the battery's power consumption. The self-generating power system of the work bucket platform can solve the problem of not being able to draw power from the undercarriage battery to power the platform's power-consuming components, but it also presents its own challenge: how to start the hydraulic power generation system. The hydraulic generator system generates electricity by controlling a hydraulic motor to drive a generator. The hydraulic motor and other actuators of the platform are located on the work bucket platform. The turntable's multi-way valve supplies oil to the platform. The key issue is how to manage the hydraulic oil supplied by the turntable to the platform to drive the generator motor.Normally, the start and stop of the actuator are controlled by a solenoid valve. The solenoid valve assembly itself also requires power to start. If the platform battery is depleted, the solenoid valve will not be able to start, and even if hydraulic oil is delivered to the platform valve assembly, it will not be able to drive the generator motor. Alternatively, the solenoid valve can directly supply oil to the generator motor when it is de-energized. The generator motor is connected in parallel with the other actions of the platform. When the other actions of the platform are working, the solenoid valve must always be energized, so that the generator motor stops working, which increases the power consumption of the platform itself.

[0003] Chinese invention patent CN109250626A discloses a control method for a hydraulic generator. This method uses an independent pump source and control valve group to drive the hydraulic generator system. The control valve of the hydraulic generator motor is located at the lower part of the turntable, and its activation can be directly powered by the base car battery, unaffected by the platform's own battery power. However, this scheme uses an independent pipeline system to supply power from the base car to the platform generator motor, and the remaining platform movements use a separate independent oil supply circuit. This increases the number of internal pipelines in the boom, increases the difficulty of pipeline layout, and reduces the reliability of the pipeline transmission system. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide a hydraulic power generation control system for an insulated boom aerial work platform, which solves the problem of platform generator self-starting, reduces the number of internal pipelines in the boom, optimizes the layout of internal pipelines in the boom, and improves the working reliability of the boom pipelines.

[0005] Technical Solution: The control system of the present invention includes a hydraulic oil tank and a multi-way valve for supplying oil to the platform valve group. The multi-way valve is placed on a turntable and includes an oil inlet P for connecting to a pump source or other valve groups, an oil return port R for connecting to the hydraulic oil tank, and an oil drain port T of the multi-way valve. It also includes an oil outlet A of the first working position of the working link for supplying oil to the platform valve group. The multi-way valve is connected to the first platform valve group through oil outlet A. The working link of the turntable multi-way valve has three working positions. The oil outlet of the first working position is the working link outlet A; the oil outlet of the second working position is the working link outlet B; and in the third working position, neither working link A nor B outlets outlet oil. The first platform valve group is connected to the A port of the multi-way valve through oil inlet P3. After being connected to the oil tank through oil return port T3 and the T4 port of the second platform valve group, they are connected together.

[0006] The first platform valve group includes a primary link and three working links. The primary link integrates a hydraulic logic valve and a constant flow valve. The first working link controls the lifting and lowering of the winch, the second working link controls the rotation of the winch, and the third working link controls the rotation of the work bucket.

[0007] The first joint internal integrated logic valve includes five oil ports: the inlet is connected to port P3 of the first platform valve group via an internal oil passage; the pressure signal port is connected to the first platform valve group; the normal position output port is connected to the first working joint, the second working joint, the third working joint, and port P32; the switching position output port is connected to port P31 of the first platform valve group; and the control chamber port is connected to the first platform valve group. The logic valve has two working positions: when there is no pressure signal at the pressure signal port, oil is discharged from the normal position output port; when there is a pressure signal at the pressure signal port, oil is discharged from the switching position output port.

[0008] The first joint internally integrates a constant flow valve, which includes two oil ports: the inlet port is connected to the logic valve pressure signal port; and the return port is internally connected to the oil port T3 of the first platform valve group.

[0009] The first working link integrates a first check valve and a second check valve. The first check valve is connected in parallel with port A1 and transmits the pressure oil from port A1 to the pressure signal port of the first logic switching valve through the internal Ls oil passage. The second check valve is connected in parallel with port B1 and transmits the pressure oil from port B1 to the pressure signal port of the logic valve through the internal Ls oil passage.

[0010] The second joint integrates a third check valve and a fourth check valve. The third check valve is connected in parallel with port A2 and transmits the pressure oil from port A2 to the pressure signal port of the logic valve through the internal Ls oil passage. The fourth check valve is connected in parallel with port B2 and transmits the pressure oil from port B2 to the pressure signal port of the logic valve through the internal Ls oil passage.

[0011] The third working link integrates a fifth check valve and a sixth check valve. The fifth check valve is connected in parallel with port A3 and can transmit the pressure oil from port A3 to the pressure signal port of the logic valve through the internal Ls oil passage. The sixth check valve is connected in parallel with port B3 and can transmit the pressure oil from port B3 to the pressure signal port of the logic valve through the internal Ls oil passage.

[0012] The second platform valve group is connected to the oil port P32 of the first platform valve group through the oil inlet P4; it is connected to the hydraulic oil tank through the oil return port T4 and the oil port T3 of the first platform valve group; and it is connected to the Y port of the first platform valve group through the pressure signal oil port LS.

[0013] The second platform valve group includes two working links: the fourth working link is used to control the hydraulic tools, and the fifth working link is used to control the lifting and lowering of the work bucket.

[0014] The first platform valve group also includes a pressure signal port Y and a P31 connected to the generator motor.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0016] (1) This invention integrates a logic valve into the platform valve group. When the hydraulic power generation system needs to be driven, the turntable multi-way valve is operated to move it to the first working position to supply oil to the working bucket platform. It is not necessary to consider whether the working bucket platform battery is in a depleted state. The hydraulic power generation can be started and recharged, which solves the problem that the hydraulic power generation system of the insulated boom aerial work vehicle cannot start when the platform battery is depleted. The logic valve is integrated into the first link of the first platform valve group. The oil supply line of the hydraulic power generation system and the platform valve group share the oil supply line. There is no need to set up a separate oil inlet pipe for the hydraulic power generation system, which reduces the number of internal pipelines of the boom, reduces the pipeline layout pressure, improves the working reliability of the boom pipeline transmission system, and realizes the automatic switching application between other platform actions and hydraulic power generation.

[0017] (2) This invention eliminates the need for a separate electromagnetic actuation valve on the work platform for hydraulic generator start-up. Self-starting is achieved through a hydraulic logic switching valve. Even when the work platform battery is depleted, the generator can be automatically started simply by controlling the multi-way valve at the turntable position. This invention eliminates the need for a separate electromagnetic actuation valve for hydraulic generator start-up. When other platform actions are in progress, controlling the start or stop of the hydraulic generator does not require continuous power, reducing platform power consumption and extending the platform battery's range. The hydraulic logic switching valve used in this invention is integrated within the platform valve group, eliminating the need for a separate oil inlet line, reducing the number of internal pipelines in the boom, and improving the reliability of the internal hoses in the insulated boom.

[0018] (3) The first platform valve group of the present invention is equipped with an integrated logic valve. The logic valve automatically switches between hydraulic power generation and other platform actions according to the change of control oil circuit pressure signal. The logic valve has five oil ports, including an oil inlet, a pressure signal port, a normal position oil outlet, a switching position oil outlet, and a control chamber oil port. The hydraulic logic valve of the present invention can be selected as a priority flow type, that is, the hydraulic oil input to the oil inlet is preferentially supplied to a certain constant flow at the normal position oil outlet. When the inlet flow at the oil inlet of the logic valve is greater than the set value, under the premise of ensuring the constant flow at the normal position oil outlet is preferentially supplied, the excess flow is output from the switching position oil outlet to drive the hydraulic generator motor to work. At this time, the hydraulic generator and other platform actions can work simultaneously. In emergency situations, it can be charged and worked at the same time without stopping the machine for charging.

[0019] (4) The first platform valve group of this invention integrates a constant flow valve insert. When any working link of the platform valve group is activated, the constant flow valve insert ensures timely pressure reduction at the pressure signal port of the logic valve, allowing the logic valve to operate in its normal position. When any working link of the platform valve group stops operating, the constant flow valve can promptly unload the pressure at the pressure signal port of the logic valve, ensuring that the logic valve switches to the reversing position. Each working link of the platform valve group of this invention integrates a check valve, which is connected in parallel with the working port of the working link. When any working link of the platform valve group is activated, the pressure signal of the working oil circuit can be transmitted to the LS signal oil circuit inside the platform valve group through the check valve, and both can act on the pressure signal port of the logic switching valve inside the first link of the first platform valve group.

[0020] (5) The multi-way valve of the present invention is an electro-hydraulic proportional valve, which can be operated manually or remotely. The multi-way valve is powered by the battery of the undercarriage and is not affected by the power of the platform battery. The first platform valve group and the second platform valve group are placed on the working bucket platform respectively. The two are arranged separately to reduce the space occupied by the two. The pressure signal is transmitted between them through the Y port of the first platform valve group and the LS port of the second platform valve. The multi-way valve 2 of the present invention is arranged at the turntable position. The multi-way valve 2 can be an independent valve group or it can be used as a separate working link integrated with the other actions of the turntable (amplitude, extension, rotation). Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the hydraulic control principle of the present invention. Detailed Implementation

[0022] This invention discloses a hydraulic power generation control system for an insulated boom aerial work platform, the connection method of which is as follows: Figure 1 As shown; hydraulic oil tank 1; multi-way valve 2, which is an electro-hydraulic proportional valve located on the turntable, can be electrically driven or directly driven by a handle in its working configuration; oil port P is the oil inlet, which can be connected to a pump source or other oil supply valve group; oil port R is the oil return port, connected to the hydraulic oil tank; port T is the oil drain port of the multi-way valve, connected to the hydraulic oil tank; oil port A is the first working position outlet of the working configuration, responsible for supplying oil to the platform valve group; the working configuration of multi-way valve 2 has three working positions: the first working position, oil flows out from port A; the second working position, oil flows out from port B; the third working position, neither port A nor port B flows out; in this case, the working configuration of multi-way valve 2 operates in the first working position. By adjusting the current of the multi-way valve's proportional solenoid or by adjusting the movement of the handle, the flow rate of oil port A can be adjusted, thereby adjusting the platform's movement speed.

[0023] First platform valve group 3; oil port P3 is the oil inlet, connected to port A of multi-way valve 2; oil port T3 is the oil return port, connected to port T4 of the second single platform valve group 4 and then connected back to the oil tank; oil port Y is the pressure signal oil port; P31 is the generator motor oil inlet;

[0024] The first platform valve group 3 includes a primary link and three working links. The primary link 31 integrates a logic switching valve 311 and a constant flow valve 312. The first working link 32 controls the lifting and lowering of the winch, the second working link 33 controls the rotation of the winch, and the third working link 34 controls the rotation of the work bucket.

[0025] The first joint 31 integrates a logic valve 311, which has five ports. Port 1 is the inlet, connected to port P3 of the first platform valve group 3 via an internal oil passage within the valve body; port 2 is the pressure signal port, connected to the interior of the first platform valve group 3; port 3 is the normal position output port, connected to the first working joint 32, the second working joint 33, the third working joint 34, and the interior of port P32; port 4 is the switching position output port, connected to the interior of port P31 of the platform valve group 3; and port 5 is the control chamber port, connected to port 3. The logic valve 311 has two working positions: when there is no pressure signal at port 2, oil flows out from port 3 of the logic valve 311; when there is a pressure signal at port 2 of the logic valve 311, oil flows out from port 4 of the logic valve 311.

[0026] The first-connector 31 integrates a constant flow valve 312, which has two ports. Port 6 is the inlet port, which is connected to port 2 of the logic valve 411; port 7 is the return port, which is internally connected to port T3 of the platform valve group 3. Ports 6 and 7 are always in a connected state.

[0027] The first working link 32 integrates a first check valve 35 and a second check valve 36. The first check valve 35 is connected in parallel with the oil port A1 and can transfer the pressure oil from the A1 port to the 2 port of the logic valve 311 through the internal Ls oil passage. The second check valve 36 is connected in parallel with the oil port B1 and can transfer the pressure oil from the B1 port to the 2 port of the logic switching valve 311 through the internal Ls oil passage.

[0028] The second working link 33 integrates a third check valve 37 and a fourth check valve 38. The third check valve 37 is connected in parallel with port A2 and can transfer the pressure oil from port A2 to port 2 of logic valve 311 through the internal Ls oil passage. The fourth check valve 38 is connected in parallel with port B2 and can transfer the pressure oil from port B2 to port 2 of logic valve 311 through the internal Ls oil passage.

[0029] The third working link 34 internally integrates a fifth check valve 39 and a sixth check valve 310. The fifth check valve 39 is connected in parallel with port A3 and can transfer the pressure oil from port A3 to port 2 of logic valve 311 through the internal Ls oil passage. The sixth check valve 310 is connected in parallel with port B3 and can transfer the pressure oil from port B3 to port 2 of logic valve 311 through the internal Ls oil passage.

[0030] The second platform valve group 4 has an oil inlet port P4, which is connected to the oil inlet port P32 of the first platform valve group 3; an oil return port T4, which is connected to the hydraulic oil tank after being connected to the oil inlet port T3 of the first platform valve group 3; and an oil signal port LS, which is connected to the Y port of the first valve group.

[0031] The second platform valve group 4 includes two working links: the fourth working link 41 controls the hydraulic tools, and the fifth working link 42 controls the lifting and lowering of the work bucket.

[0032] It also includes a generator motor 5 for operation, whose output shaft drives the hydraulic generator to rotate; a winch lifting motor 6, whose output shaft drives the winch reducer; a winch slewing motor 7, whose output shaft drives the slewing reducer; a work bucket slewing motor 8, whose output shaft drives the slewing reducer; a slewing buffer valve 9 to ensure the smooth slewing of the work bucket; a work bucket lifting cylinder 10 to adjust the working height of the work bucket; and a lifting balance valve 11 to ensure the smooth lifting and lowering of the work bucket.

[0033] Working principle: Combined with the attached Figure 1 This section provides a further explanation of the specific working process of this system.

[0034] When the insulated boom aerial work platform is in operation, multi-way valve 2 is responsible for supplying oil to the platform valve group; the platform valve group selects to execute specific actions by controlling the energization and de-energization of the electromagnets of each working link.

[0035] Here is an example illustrating the self-starting process of a hydraulic generator. When it is necessary to start the hydraulic generator, the mechanical handle of the multi-way valve 2 can be operated manually or the multi-way valve 2 can be operated electrically to make its working link work in the first working position. At this time, the working link A port of the multi-way valve 2 outputs hydraulic oil, which is transported to the P3 port of the platform valve group 3 through the hydraulic pipeline, and simultaneously transmitted to ports 1, 3 and 5 of the hydraulic logic valve 311 through the internal oil circuit. If the platform does not perform any operation at this time, that is, the solenoid valves of each working link of the first platform valve group 3 and the second platform valve group 4 are not energized, and there is no pressure oil in each working link oil circuit A and B. At this time, the pressure of oil port 3 and oil port 5 of logic valve 311 gradually increases. The pressureless oil in working link oil circuits A and B is transmitted to oil port 2 of logic valve 311. At this time, oil port 2 is connected to oil port 6 of constant flow valve 312, which is a low-pressure chamber. Under this condition, logic valve 311 switches to the reversing position under the pressure of oil port 3. At this time, oil port 1 of the switching valve is connected to oil port 4. The hydraulic oil output from oil port A of multi-way valve 2 is input to the oil inlet of generator motor 9 through oil port P3 of the first platform valve group 3, oil port 1 of logic valve 311, oil port 4 of logic valve 311 and oil port P31 of the first platform valve group 3. The outlet of generator motor is directly connected to hydraulic oil tank. Generator motor drives hydraulic power generation system to work and generate electricity for the platform. As explained above, the generator motor 9 does not require energization of the solenoid valves in the platform valve group to start; it relies solely on the automatic switching of the logic valve 311 under hydraulic pressure. Therefore, even when the platform battery is depleted or the platform valve group is without power, the hydraulic power generation system can be started and the platform battery can be self-charged by operating the multi-way valve at the turntable position.

[0036] Here's an example illustrating the platform's other actions and the automatic switching between hydraulic power generation. When the crane hoist is in operation, the working port A of the multi-way valve 2 outputs pressurized oil to port P3 of the first platform valve group 3, which is then simultaneously transmitted to ports 1, 3, and 5 of the logic valve 311 via internal oil passages. The electromagnet YA1 of the first working port 32 of the first platform valve group 3 is energized, connecting the internal oil inlet of the first working port 32 to port A1. The pressurized oil output from port A1 drives the hydraulic motor 5. Simultaneously, the pressure at port A1 within the first working port 32 is transmitted to port 2 of the logic valve 311 via the first check valve 35 and internal oil passage Lsa1. Port P3 of the multi-way valve acts on port 5 of the control chamber via internal oil passages and ports 1 and 3 of the logic valve 311. Since the pressure at port 2 of the logic valve 311's spring chamber is greater than the pressure at port 5 of the control chamber, the logic valve 311 operates in its normal position, and oil exits from port 3. When the crane winch hydraulic motor stops working, that is, when the electromagnet YA1 is de-energized, the working port A of the first working link 32 no longer outputs pressure oil. At this time, the pressure at the spring chamber 2 of the logic switching valve 311 is unloaded through the constant flow valve 312. If the multi-way valve 2 continues to supply oil to the platform at this time, the logic valve 311 switches to the working position again. At this time, the oil port 4 of the logic valve 311 outputs hydraulic oil to drive the generator motor 9 to work, and perform hydraulic self-generation of the working bucket platform.

[0037] As can be seen from the above examples, by integrating the hydraulic logic valve 311 into the platform valve group, when it is necessary to drive the hydraulic power generation system, as long as the multi-way valve 2 is operated to move it to the first working position and supply oil to the working bucket platform, it is not necessary to consider whether the working bucket platform battery is in a depleted state, and the hydraulic power generation can be automatically started and self-charged.

[0038] Meanwhile, since the logic valve 311 is integrated into the first link of the first platform valve group 3 in this case, the oil supply circuit of the hydraulic power generation system and the platform valve group share the oil supply pipeline. There is no need to set up a separate oil inlet pipe for the hydraulic power generation system, which reduces the number of internal pipelines in the boom, reduces the pipeline layout pressure, and improves the working reliability of the boom pipeline transmission system.

[0039] Meanwhile, since the switching of the working position of the logic valve 311 in this case is automatically completed by the pressure difference between its own spring chamber oil port 2 and control chamber oil port 5, it is not necessary to add a separate working link in the platform valve group to start or stop it by power, thereby reducing the overall power consumption of the platform valve group and improving the battery life of the platform.

[0040] As a further application of this case, the hydraulic logic valve 311 can be a priority constant flow type, that is, the hydraulic oil input to the inlet 1 is preferentially supplied to the port 3 at a certain constant flow rate, which can be preset to a certain fixed value; when the flow rate of the multi-way valve 2 input to the logic valve 311 port 1 is greater than the constant flow rate setting value, the logic valve 311 can perform a transition switch, and the excess flow is output from the port 4 to drive the hydraulic generator motor 9 to work. At this time, the hydraulic generator and the other actions of the platform can work simultaneously, realizing charging while working without stopping to charge.

Claims

1. A hydraulic power generation control system for an insulated boom aerial work platform, comprising a hydraulic oil tank (1) and a multi-way valve (2) for supplying oil to the platform valve group; characterized in that: The multi-way valve (2) is placed on a turntable. The multi-way valve (2) includes an inlet P for connecting to a pump source or other oil supply valve groups, an outlet R for connecting to the hydraulic oil tank (1), and a drain port T. The multi-way valve (2) has three working positions. The outlet of the first working position is port A. The outlet of the second working position is port B. In the third working position, neither port A nor port B produces oil. The first platform valve group (3) is connected to port A of the multi-way valve (2) through inlet P3. The first platform valve group (3) is connected to the hydraulic oil tank (1) through outlet T3 and outlet T4 of the second platform valve group (4). The first platform valve group (3) includes a first link and three working links. The first link (31) integrates a logic switching valve (311) and a constant flow valve (312). The first working link (32) controls the lifting and lowering of the winch, the second working link (33) controls the rotation of the winch, and the third working link (34) controls the rotation of the work bucket. The oil inlet of the logic switching valve (311) is connected to the oil inlet P3 of the first platform valve group (3) through an oil passage inside the valve body. The pressure signal port of the logic switching valve (311) is connected to the inside of the first platform valve group (3). The normal position output port of the logic switching valve (311) The oil ports P32 of the first working link (32), the second working link (33), the third working link (34), and the first platform valve group (3) are respectively connected; the switching position output port of the logic switching valve (311) is connected to the P31 port of the first platform valve group (3); the control chamber oil port of the logic switching valve (311) is connected to the first platform valve group (3); the logic switching valve (311) has two working positions. When there is no pressure signal at the pressure signal port, the normal position output port of the logic switching valve (311) outputs oil; when there is a pressure signal at the pressure signal port, the logic switching valve... Oil is output from the switching port of (311); the P31 port of the first platform valve group (3) is connected to the generator motor; the first working link (32) integrates a first check valve (35) and a second check valve (36), the first check valve (35) is connected in parallel with the oil port A1 of the first working link (32), the first check valve (35) transmits the pressure oil of the oil port A1 to the pressure signal port through the internal Ls oil passage; the second check valve (36) is connected in parallel with the oil port B1 of the first working link (32), the second check valve (36) transmits the pressure oil of the oil port B1 to the pressure signal port through the internal Ls oil passage.

2. The hydraulic power generation control system for an insulated boom aerial work platform according to claim 1, characterized in that, The first joint (31) integrates a constant flow valve (312), which has two oil ports. The oil inlet of the constant flow valve (312) is connected to the pressure signal port. The oil return port of the constant flow valve (312) is internally connected to the oil return port T3 of the first platform valve group (3).

3. The hydraulic power generation control system for an insulated boom aerial work platform according to claim 1, characterized in that, The second working link (33) integrates a third check valve (37) and a fourth check valve (38). The third check valve (37) is connected in parallel with the oil port A2 of the second working link (33). The third check valve (37) transmits the pressure oil from the oil port A2 to the pressure signal port through the internal Ls oil passage. The fourth check valve (38) is connected in parallel with the oil port B2 of the second working link (33). The fourth check valve (38) transmits the pressure oil from the oil port B2 to the pressure signal port through the internal Ls oil passage.

4. The hydraulic power generation control system for an insulated boom aerial work platform according to claim 1, characterized in that, The third working link (34) integrates a fifth check valve (39) and a sixth check valve (310). The fifth check valve (39) is connected in parallel with the oil port A3 of the third working link (34). The fifth check valve (39) transmits the pressure oil from the oil port A3 to the pressure signal port through the internal Ls oil passage. The sixth check valve (310) is connected in parallel with the oil port B3 of the third working link (34). The sixth check valve (310) transmits the pressure oil from the oil port B3 to the pressure signal port through the internal Ls oil passage.

5. The hydraulic power generation control system for an insulated boom aerial work platform according to claim 1, characterized in that, The second platform valve group (4) is connected to the oil port P32 of the first platform valve group (3) through the oil inlet P4; the second platform valve group (4) is connected to the hydraulic oil tank (1) through the oil return port T4 and the oil return port T3 of the first platform valve group (3); the second platform valve group (4) is connected to the Y port of the first platform valve group (3) through the pressure signal oil port LS.

6. The hydraulic power generation control system for an insulated boom aerial work platform according to claim 5, characterized in that, The second platform valve group (4) includes two working links, wherein the fourth working link (41) is used to control the hydraulic tools and the fifth working link (42) is used to control the lifting of the working bucket.

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