Hydraulic control system and control method of green comprehensive maintenance vehicle suitable for multiple tools

Abstract

The application discloses a kind of green comprehensive maintenance vehicle hydraulic control system and control method suitable for multiple tools, including pruning tool with working oil port P, T and L, proportional multi-way valve includes first, second, third, fourth, fifth and sixth working connection, hydraulic oil tank is connected with working oil port P by first hydraulic pump, first hydraulic pump outlet is connected with working oil port T between parallel first electromagnetic unloading valve and overflow valve, hydraulic oil tank is connected with proportional multi-way valve by second hydraulic pump, is connected with rotation loop by sixth working connection, is connected with arm body unfolding loop by fifth working connection, is connected with telescopic arm unfolding loop by fourth working connection, is connected with telescopic arm telescopic loop by third working connection, is connected with pruning tool swing loop by second working connection, is connected with working oil port P by first working connection;Working oil port T is connected with hydraulic oil tank.The application can simultaneously realize pruning tool and feeding simultaneous operation, improve pruning operation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to a hydraulic control system of a green comprehensive maintenance vehicle, and particularly relates to a hydraulic control system of a green comprehensive maintenance vehicle suitable for multiple tools and a control method thereof. BACKGROUND

[0002] The green comprehensive maintenance vehicle sends the pruning tool to the working area through the multi-degree-of-freedom mechanism such as rotation, amplitude change and extension, and performs pruning work on trees and green belts, thereby greatly reducing the labor operation intensity and improving the operation efficiency. The pruning tool is usually an independent control system, which includes a valve group and an electric control system, and the hydraulic system generally provides three oil paths, i.e., an oil inlet path, an oil return path and an oil discharge path. At present, the green comprehensive maintenance vehicle is mainly aimed at a single pruning tool, the pruning object is single, and the utilization rate of the vehicle is not high.

[0003] Therefore, it is urgent to solve the above problems. SUMMARY

[0004] The first object of the present application is to provide a hydraulic control system of a green comprehensive maintenance vehicle suitable for multiple tools, which can match multiple working tools on one vehicle, thereby improving the utilization rate of the vehicle and realizing simultaneous work of the pruning tool and feeding, thereby improving the pruning operation efficiency.

[0005] The second object of the present application is to provide a control method of the hydraulic control system of the green comprehensive maintenance vehicle suitable for multiple tools.

[0006] Technical scheme: In order to achieve the above objects, the present application discloses a hydraulic control system of a green comprehensive maintenance vehicle suitable for multiple tools, which comprises a hydraulic oil tank, a first hydraulic pump, a second hydraulic pump, a first electromagnetic unloading valve, a relief valve, a proportional multi-way valve, a pruning tool swing circuit, a telescopic arm extension and retraction circuit, a telescopic arm extension circuit, an arm body extension circuit, a rotation circuit and a pruning tool. The pruning tool has a working oil port P, a working oil port T and a working oil port L. The proportional multi-way valve comprises a second electromagnetic unloading valve, a first working connection, a second working connection, a third working connection, a fourth working connection, a fifth working connection and a sixth working connection. The hydraulic oil tank is connected with the working oil port P of the pruning tool through the first hydraulic pump. The first electromagnetic unloading valve and the relief valve are connected in parallel between the outlet of the first hydraulic pump and the working oil port T of the pruning tool. The hydraulic oil tank is connected with the proportional multi-way valve through the second hydraulic pump, connected with the rotation circuit through the sixth working connection, connected with the arm body extension circuit through the fifth working connection, connected with the telescopic arm extension circuit through the fourth working connection, connected with the telescopic arm extension and retraction circuit through the third working connection, connected with the pruning tool swing circuit through the second working connection and connected with the working oil port P of the pruning tool through the first working connection. The working oil port T of the pruning tool is connected with the hydraulic oil tank.

[0007] The first hydraulic pump is connected with the working oil port P of the trimming tool in series through a first one-way valve, a first high-pressure filter and a first quick-change joint.

[0008] Preferably, a first pressure gauge is connected in series between the first hydraulic pump and the first one-way valve, and a second pressure gauge is arranged on the working oil port M of the first connection of the proportional multi-way valve.

[0009] Furthermore, a second one-way valve and a second high-pressure filter are connected in series between the second hydraulic pump and the proportional multi-way valve.

[0010] Further, the working oil port L of the trimming tool is connected with the hydraulic oil tank through a third quick-change joint.

[0011] Preferably, the trimming tool swing circuit comprises a first bidirectional balance valve and a third luffing oil cylinder, the telescopic arm telescopic circuit comprises a second bidirectional balance valve and a telescopic arm telescopic oil cylinder, the telescopic arm unfolding circuit comprises a third bidirectional balance valve and a second luffing oil cylinder, the arm body unfolding circuit comprises a fourth bidirectional balance valve and a first luffing oil cylinder, and the rotation circuit comprises a fifth bidirectional balance valve and a motor.

[0012] Furthermore, a third hydraulic pump and a third one-way valve are further included, and the hydraulic oil tank is connected with the proportional multi-way valve through the third hydraulic pump, the third one-way valve and the second high-pressure filter.

[0013] Preferably, the working oil port T of the trimming tool is connected with the hydraulic oil tank in series through a second quick-change joint and a radiator.

[0014] The control method of the hydraulic control system of the green comprehensive maintenance vehicle suitable for multiple tools comprises the following steps:

[0015] The second hydraulic pump delivers oil through the second one-way valve and the second high-pressure filter to the proportional multi-way valve, the second electromagnetic unloading valve is powered on, the second electromagnetic unloading valve is closed, the fifth working joint is operated to make the hydraulic oil enter the first variable amplitude oil cylinder through the fourth two-way balance valve, and the arm body is lifted; after the arm body is lifted to a certain height, the sixth working joint is operated to make the hydraulic oil drive the motor through the fifth two-way balance valve to rotate the speed reduction mechanism, so that the arm body is turned to the outside of the vehicle body; the fourth working joint is operated to make the hydraulic oil enter the second variable amplitude oil cylinder through the third two-way balance valve, and the telescopic arm is unfolded, and the trimming tool is tilted with the unfolding of the telescopic arm; the second working joint is operated to make the hydraulic oil enter the third variable amplitude oil cylinder through the first two-way balance valve, and the trimming tool is tilted upward, and the trimming posture is adjusted; the third working joint is operated to make the hydraulic oil enter the telescopic arm through the second two-way balance valve, and the telescopic arm is extended, and the cutter is sent to the trimming area; after the cutter is sent to the trimming area, the first working joint is operated to make the hydraulic oil enter the trimming tool through the first quick connector; the hydraulic oil of the working oil port T of the trimming tool enters the radiator through the second quick connector to be cooled, and finally flows back to the hydraulic oil tank; the hydraulic oil of the working oil port L of the trimming tool flows back to the hydraulic oil tank through the third quick connector to be discharged;

[0016] When the trimming tool needs large-flow cutting operation, the first electromagnetic unloading valve is powered on, the first electromagnetic unloading valve is closed, the first pressure gauge and the second pressure gauge are observed to make the overflow pressures of the first hydraulic pump and the second hydraulic pump the same; the first hydraulic pump delivers oil through the first one-way valve and the first high-pressure filter, and the oil is combined with the hydraulic oil output by the first working joint to supply the trimming tool, and the cutting speed can be changed by changing the flow output by the first working joint;

[0017] When the trimming operation is completed, the first electromagnetic unloading valve is powered off, the first electromagnetic unloading valve is opened, the first hydraulic pump outputs oil through the first electromagnetic unloading valve to enter the radiator and flow back to the hydraulic oil tank; the second hydraulic pump delivers oil through the second one-way valve and the second high-pressure filter to the proportional multi-way valve, the second electromagnetic unloading valve is powered on, the second electromagnetic unloading valve is closed, the third working joint is operated to make the hydraulic oil enter the telescopic arm through the second two-way balance valve, and the telescopic arm is retracted; the fourth working joint is operated to make the hydraulic oil enter the second variable amplitude oil cylinder through the third two-way balance valve, and the telescopic arm is folded; the second working joint is operated to make the hydraulic oil enter the third variable amplitude oil cylinder through the first two-way balance valve, and the trimming tool is tilted downward; the sixth working joint is operated, the oil drives the motor through the fifth two-way balance valve to rotate the speed reduction mechanism, so that the arm body is turned back to the vehicle body and the vehicle body are parallel; the fifth working joint is operated to make the hydraulic oil enter the first variable amplitude oil cylinder through the fourth two-way balance valve, and the oil cylinder is retracted to drive the arm body to be placed in the parking state.

[0018] The method further comprises the following steps:

[0019] When the first hydraulic pump and the second hydraulic pump fail and stop working, the third hydraulic pump is started, the oil passes through the third one-way valve and the second high-pressure filter to the proportional multi-way valve, the second electromagnetic unloading valve is powered on, the second electromagnetic unloading valve is closed, the third working connection is operated to make the hydraulic oil pass through the second two-way balance valve into the telescopic arm telescopic cylinder rod cavity, and the telescopic arm is retracted; the fourth working connection is operated to make the hydraulic oil pass through the third two-way balance valve into the second luffing cylinder rod cavity, and the telescopic arm is folded; the second working connection is operated to make the hydraulic oil pass through the first two-way balance valve into the third luffing cylinder rod cavity, and the trimming tool is lowered; the sixth working connection is operated to make the hydraulic oil pass through the fifth two-way balance valve to drive the motor to rotate, so that the arm body is rotated back to be parallel to the vehicle body; and the fifth working connection is operated to make the hydraulic oil pass through the fourth two-way balance valve into the first luffing cylinder rod cavity, and the oil cylinder is retracted to drive the arm body to be placed in the parking state.

[0020] Beneficial effects: Compared with the prior art, the present application has the following remarkable advantages: the present application can realize that one vehicle is matched with multiple trimming tools, improves the utilization rate of the vehicle, the hydraulic system adopts a double hydraulic pump, one of which directly supplies the trimming tool, and the other supplies the valve action on the vehicle, when the tool reaches the working area and starts trimming work, the output flow of the valve on the vehicle and the output flow of the hydraulic pump are simultaneously supplied to the tool, realizing the composite control of trimming work with different flow, realizing the combined action of the trimming tool and the arm structure, and improving the trimming work efficiency; the present application also simultaneously provides an emergency hydraulic pump, which can be used for emergency parking of the green comprehensive maintenance device when the main pump source fails. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a hydraulic principle diagram of the embodiment 1 of the present application;

[0022] Figure 2 It is a structural schematic diagram of the embodiment 1 of the present application;

[0023] Figure 3 It is a structural schematic diagram of the embodiment 2 of the present application. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present application more clear, specific embodiments of the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

[0025] It should be understood that the present application can be implemented in different forms, and should not be interpreted as being limited to the embodiments presented here. On the contrary, these embodiments are provided to make the disclosure complete and complete, and to fully convey the scope of the present application to those skilled in the art. In the drawings, the size and relative size of the parts may be exaggerated for clarity. The same reference signs represent the same parts throughout.

[0026] Example 1

[0027] As shown in Figure 1 and Figure 2 , the hydraulic control system of the present application for the multi-machine green comprehensive maintenance vehicle includes a hydraulic oil tank 1, a radiator 2, a first hydraulic pump 3-1, a second hydraulic pump 3-2, a first electromagnetic unloading valve 4, a relief valve 5, a first pressure gauge 6-1, a second pressure gauge 6-2, a first check valve 7-1, a second check valve 7-2, a third check valve 7-3, a first high-pressure filter 8-1, a second high-pressure filter 8-2, a proportional multi-way valve 9, a pruning machine swing circuit, a telescopic arm telescopic circuit, a telescopic arm extension circuit, an arm body extension circuit, a rotary circuit, a first quick-change connector 14-2, a second quick-change connector 14-3, a third quick-change connector 14-1, and a pruning machine 15, which is a clamping saw 15-1. The pruning machine 15 has a working oil port P, a working oil port T, and a working oil port L. The proportional multi-way valve 9 includes a second electromagnetic unloading valve 9-1, a first connection 9-2, a first working connection 9-3, a second working connection 9-4, a third working connection 9-5, a fourth working connection 9-6, a fifth working connection 9-7, a sixth working connection 9-8, and a tail connection 9-9. The first connection 9-2 generates damping to ensure stable operation of the proportional multi-way valve. The M port of the first connection 9-2 is provided with the second pressure gauge 6-2, which can display the action pressure. The hydraulic oil tank 1 is connected to the working oil port P of the pruning machine through the first hydraulic pump 3-1, the first check valve 7-1, the first high-pressure filter 8-1, and the first quick-change connector 14-2. The outlet of the first hydraulic pump 3-1 is connected in parallel with the working oil port T of the pruning machine through the electromagnetic unloading valve 4 and the relief valve 5. The hydraulic oil tank 1 is connected to the proportional multi-way valve 9 through the second hydraulic pump 3-2, the second check valve 7-2, and the second high-pressure filter 8-2. The proportional multi-way valve 9 is connected to the rotary circuit through the sixth working connection 9-8, to the arm body extension circuit through the fifth working connection 9-7, to the telescopic arm extension circuit through the fourth working connection 9-6, to the telescopic arm telescopic circuit through the third working connection 9-5, to the pruning machine swing circuit through the second working connection 9-4, and to the working oil port P of the pruning machine through the first working connection 9-3 and the second quick-change connector 14-2. The working oil port T of the pruning machine 15 is connected to the hydraulic oil tank 1. The first pressure gauge 6-1 is connected in series between the first hydraulic pump 3-1 and the first check valve 7-1. The second pressure gauge 6-2 is provided on the working oil port M of the first connection 9-2 of the proportional multi-way valve 9, which can adjust the output oil pressure of the first hydraulic pump 3-1 through the relief valve 5 when the first electromagnetic unloading valve 4 is closed. The working oil port L of the pruning machine is connected to the hydraulic oil tank through the third quick-change connector 14-1. The working oil port T of the pruning machine 15 is connected in series to the second quick-change connector 14-3 and the radiator 2. The hydraulic oil tank 1 is connected to the proportional multi-way valve 9 through the third hydraulic pump 3-1, the third check valve 7-3, and the second high-pressure filter 8-2.

[0028] The trimming tool swing circuit comprises a first bidirectional balance valve 10-1 and a third variable amplitude oil cylinder 12-1, the telescopic arm telescopic circuit comprises a second bidirectional balance valve 10-2 and a telescopic arm telescopic oil cylinder 12-2, the telescopic arm unfolding circuit comprises a third bidirectional balance valve 10-3 and a second variable amplitude oil cylinder 12-3, the arm body unfolding circuit comprises a fourth bidirectional balance valve 10-4 and a first variable amplitude oil cylinder 12-4, and the rotation circuit comprises a fifth bidirectional balance valve 11 and a motor 13.

[0029] The hydraulic principle of the present application is shown in the figure. Figure 1 The first hydraulic pump 3-1 and the second hydraulic pump 3-2 are driven by the power take-off device of the automobile chassis, oil is sucked from the hydraulic oil tank 1, and the system back oil is cooled by the radiator 2 and then flows back to the oil tank. The oil delivered by the first hydraulic pump 3-1 flows to the first quick-change connector 14-2 through the first check valve 7-1 and the first high-pressure filter 8-1. The first electromagnetic unloading valve 4 and the overflow valve 5 are installed between the first hydraulic pump 3-1 and the first check valve 7-1, and the first electromagnetic unloading valve 4 and the overflow valve 5 are connected in parallel, one end of which is connected to the outlet of the first hydraulic pump 3-1, and the other end is connected to the back oil. The first pressure gauge 6-1 is installed between the first hydraulic pump 3-1 and the first check valve 7-1, and the output oil pressure of the first hydraulic pump 3-1 can be adjusted through the overflow valve 5 when the first electromagnetic unloading valve 4 is closed.

[0030] The control method of the hydraulic control system of the present application is suitable for a green comprehensive maintenance vehicle with multiple tools, and comprises the following steps:

[0031] The second hydraulic pump 3-2 delivers oil through the second check valve 7-2 and the second high-pressure filter 8-2 to the proportional multi-way valve 9. The second electromagnetic unloading valve 9-1 is energized, the second electromagnetic unloading valve is closed, the fifth working joint 9-7 is operated to make the hydraulic oil pass through the fourth bidirectional balance valve 10-4 into the rodless chamber of the first amplitude cylinder 12-4, the oil cylinder extends, and the arm body is lifted; after the arm body is lifted to a certain height, the sixth working joint 9-8 is operated to make the hydraulic oil drive the motor 13 through the fifth bidirectional balance valve 11 to rotate the speed reduction mechanism, so that the arm body is turned to the outside of the vehicle body; the fourth working joint 9-6 is operated to make the hydraulic oil pass through the third bidirectional balance valve 10-3 into the rod chamber of the second amplitude cylinder 12-3, the telescopic arm is unfolded, and the trimming tool is tilted with the unfolding of the telescopic arm; the second working joint 9-4 is operated to make the hydraulic oil pass through the first bidirectional balance valve 10-1 into the rod chamber of the third amplitude cylinder 12-1, the trimming tool is raised, and the trimming posture is adjusted; the third working joint 9-5 is operated to make the hydraulic oil pass through the second bidirectional balance valve 10-2 into the rodless chamber of the telescopic arm telescopic cylinder 12-2, the telescopic arm is extended, and the cutter is sent to the trimming area; after the cutter is sent to the trimming area, the first working joint 9-3 is operated to make the hydraulic oil pass through the second quick-change joint 14-2 into the trimming tool, at this time, different flow rates can be output by controlling the signal size to meet the flow rate requirements of different actions of the trimming tool; the hydraulic oil of the working oil port T of the trimming tool passes through the second quick-change joint into the radiator 2 for heat dissipation and cooling, and finally flows back to the hydraulic oil tank 1; the hydraulic oil of the working oil port L of the trimming tool flows back to the hydraulic oil tank through the third quick-change joint for oil discharge; the motor or the multi-way valve discharges oil back to the hydraulic oil tank;

[0032] When the trimming tool needs large flow cutting operation, the first electromagnetic unloading valve 4 is powered on, the first electromagnetic unloading valve is closed, and the first pressure gauge and the second pressure gauge are observed to make the overflow pressure of the first hydraulic pump 3-1 and the second hydraulic pump 3-2 consistent; the first hydraulic pump 3-1 delivers oil through the first one-way valve 7-1 and the first high-pressure filter 8-1, and combines with the hydraulic oil output by the first working joint 9-3 to supply the trimming tool, meeting the different flow requirements of different trimming tools; by changing the flow output by the first working joint 9-3, the cutting speed can be changed; during actual operation, different trimming tool operation buttons can be set, and different flow requirements can be realized by selecting the corresponding operation button according to the installed tool. The overflow pressure of the first hydraulic pump 3-1 and the second hydraulic pump 3-2 should be adjusted to be consistent, and the adjustment is observed through the first pressure gauge 6-1 and the second pressure gauge 6-2. The proportional multi-way valve 9 can realize trimming cutting and feeding at the same time, improving the operation efficiency. After the trimming operation is completed, the first electromagnetic unloading valve 4 is powered off, the first electromagnetic unloading valve is opened, the first hydraulic pump 3-1 outputs oil through the first electromagnetic unloading valve 4 into the radiator 2 and flows back to the hydraulic oil tank; the second hydraulic pump 3-2 delivers oil through the second one-way valve 7-2 and the second high-pressure filter 8-2 to the proportional multi-way valve 9, the second electromagnetic unloading valve 9-1 is powered on, the second electromagnetic unloading valve 9-1 is closed, the third working joint 9-5 is operated to make the hydraulic oil enter the rod cavity of the telescopic arm telescopic cylinder 12-2 through the second double-acting balance valve 10-2, and the telescopic arm is retracted; the fourth working joint 9-6 is operated to make the hydraulic oil enter the rodless cavity of the second luffing cylinder 12-3 through the third double-acting balance valve 10-3, and the telescopic arm is folded; the second working joint 9-4 is operated to make the hydraulic oil enter the rodless cavity of the third luffing cylinder 12-1 through the first double-acting balance valve 10-1, and the trimming tool is lowered; the sixth working joint 9-8 is operated, the oil drives the motor 13 through the fifth double-acting balance valve 11 to rotate the speed reduction mechanism, so that the arm body is rotated back to parallel to the vehicle body; the fifth working joint 9-7 is operated to make the hydraulic oil enter the rod cavity of the first luffing cylinder 12-4 through the fourth double-acting balance valve 10-4, and the oil cylinder is retracted to drive the arm body to be placed in the parking state;

[0033] When the first hydraulic pump 3-1 and the second hydraulic pump 3-2 fail, the third hydraulic pump 3-3 is started, the oil passes through the third one-way valve 7-3 and the second high-pressure filter 8-2 to the proportional multi-way valve 9, the second electromagnetic unloading valve 9-1 is powered on, the second electromagnetic unloading valve is closed, the third working joint 9-5 is operated to make the hydraulic oil pass through the second bidirectional balance valve 10-2 to enter the rod cavity of the telescopic arm telescopic oil cylinder 12-2, and the telescopic arm is retracted; the fourth working joint 9-6 is operated to make the hydraulic oil pass through the third bidirectional balance valve 10-3 to enter the rodless cavity of the second luffing oil cylinder 12-3, and the telescopic arm is folded; the second working joint 9-4 is operated to make the hydraulic oil pass through the first bidirectional balance valve 10-1 to enter the rodless cavity of the third luffing oil cylinder 12-1, and the trimming tool is lowered; the sixth working joint 9-8 is operated, the oil passes through the fifth bidirectional balance valve 11 to drive the motor 13 to rotate the speed reduction mechanism, so that the arm body is turned back to be parallel to the vehicle body; and the fifth working joint 9-7 is operated to make the hydraulic oil pass through the fourth bidirectional balance valve 10-4 to enter the rod cavity of the first luffing oil cylinder 12-4, and the oil cylinder is retracted to drive the arm body to be placed in the parking state.

[0034] The present application can realize that a vehicle is matched with multiple trimming tools, improves the utilization rate of the vehicle, and adopts a double pump in the hydraulic system, wherein one hydraulic pump directly supplies the trimming tool, and the other hydraulic pump supplies the valve action on the vehicle; when the tool reaches the working area and starts the trimming work, the output flow of the valve on the vehicle and the output flow of the hydraulic pump are simultaneously supplied to the tool, different flow trimming work is realized, and the composite control is realized. The present application can realize the combined action of the trimming tool and the arm structure, and improves the trimming work efficiency. The present application is also equipped with an emergency hydraulic pump, which can be used for emergency parking of the comprehensive maintenance device of the green when the main pump source fails.

[0035] Example 2

[0036] Example 2 is the same as example 1, and the difference is that the trimming tool is a disc cutter 15-2, as shown in Figure 3 .

Claims

1. A hydraulic control system for a multi-tool integrated greening maintenance vehicle, characterized in that, The hydraulic system comprises a hydraulic oil tank (1), a first hydraulic pump (3-1), a second hydraulic pump (3-2), a first electromagnetic unloading valve (4), a relief valve (5), a proportional multi-way valve (9), a trimming tool swing circuit, a telescopic arm telescopic circuit, a telescopic arm unfolding circuit, an arm body unfolding circuit, a rotary circuit and a trimming tool (15), the trimming tool (15) has a working oil port P, a working oil port T and a working oil port L, the proportional multi-way valve (9) comprises a second electromagnetic unloading valve (9-1), a first working link (9-3), a second working link (9-4), a third working link (9-5), a fourth working link (9-6), a fifth working link (9-7) and a sixth working link (9-8), the hydraulic oil tank (1) is connected with the working oil port P of the trimming tool through the first hydraulic pump (3-1), the first hydraulic pump (3-1) is connected in parallel with the first electromagnetic unloading valve (4) and the relief valve (5) between the outlet of the first hydraulic pump (3-1) and the working oil port T of the trimming tool, the hydraulic oil tank (1) is connected with the proportional multi-way valve (9) through the second hydraulic pump (3-2), connected with the rotary circuit through the sixth working link (9-8), connected with the arm body unfolding circuit through the fifth working link (9-7), connected with the telescopic arm unfolding circuit through the fourth working link (9-6), connected with the telescopic arm telescopic circuit through the third working link (9-5), connected with the trimming tool swing circuit through the second working link (9-4), and connected with the working oil port P of the trimming tool through the first working link (9-3); the working oil port T of the trimming tool (15) is connected with the hydraulic oil tank (1); the first hydraulic pump (3-1) is connected in series with the first check valve (7-1), the first high-pressure filter (8-1) and the first quick-change connector (14-2) between the first hydraulic pump (3-1) and the working oil port P of the trimming tool in sequence, and the first working link (9-3) is connected with the working oil port P of the trimming tool through the first quick-change connector (14-2); the trimming tool swing circuit comprises a first bidirectional balance valve (10-1) and a third variable amplitude oil cylinder (12-1), the telescopic arm telescopic circuit comprises a second bidirectional balance valve (10-2) and a telescopic arm telescopic oil cylinder (12-2), the telescopic arm unfolding circuit comprises a third bidirectional balance valve (10-3) and a second variable amplitude oil cylinder (12-3), the arm body unfolding circuit comprises a fourth bidirectional balance valve (10-4) and a first variable amplitude oil cylinder (12-4), and the rotary circuit comprises a fifth bidirectional balance valve (11) and a motor (13).

2. The multi-attachment green-up integrated maintenance vehicle hydraulic control system of claim 1, wherein: The first pressure gauge (6-1) is connected in series between the first hydraulic pump (3-1) and the first check valve (7-1), and the second pressure gauge (6-2) is arranged on the working oil port M of the first link (9-2) of the proportional multi-way valve (9).

3. The multi-attachment applicable green comprehensive maintenance vehicle hydraulic control system according to claim 2, characterized in that: The second check valve (7-2) and the second high-pressure filter (8-2) are connected in series between the second hydraulic pump (3-2) and the proportional multi-way valve (9).

4. The multi-attachment applicable green comprehensive maintenance vehicle hydraulic control system according to claim 3, characterized in that: The working oil port L of the trimming tool (15) is connected with the hydraulic oil tank (1) through the third quick-change connector (14-1).

5. The multi-attachment applicable green comprehensive maintenance vehicle hydraulic control system according to claim 4, characterized in that: The third hydraulic pump (3-3) and the third one-way valve (7-3) are further included, and the hydraulic oil tank (1) is connected with the proportional multi-way valve (9) through the third hydraulic pump (3-3) and the third one-way valve (7-3) and the second high-pressure filter (8-2).

6. The multi-attachment applicable green comprehensive maintenance vehicle hydraulic control system according to claim 5, characterized in that: The second quick-change joint (14-3) and the radiator (2) are connected in sequence between the working oil port T of the trimming tool (15) and the hydraulic oil tank (1).

7. A control method for a hydraulic control system of a multi-attachment applicable green comprehensive maintenance vehicle according to claim 6, characterized by, The method comprises the following steps: The second hydraulic pump (3-2) delivers oil to the proportional multi-way valve (9) through the second one-way valve (7-2) and the second high-pressure filter (8-2), the second electromagnetic unloading valve (9-1) is powered on, the second electromagnetic unloading valve is closed, the fifth working joint (9-7) is operated to make the hydraulic oil enter the first luffing cylinder (12-4) through the fourth double-acting balance valve (10-4), the arm body is lifted, after the arm body is lifted to a certain height, the sixth working joint (9-8) is operated to make the hydraulic oil drive the motor (13) to rotate through the fifth double-acting balance valve (11), so that the arm body is turned to the outside of the vehicle body, the fourth working joint (9-6) is operated to make the hydraulic oil enter the second luffing cylinder (12-3) through the third double-acting balance valve (10-3), the telescopic arm is unfolded, and the trimming tool is tilted with the unfolding of the telescopic arm, the second working joint (9-4) is operated to make the hydraulic oil enter the third luffing cylinder (12-1) through the first double-acting balance valve (10-1), the trimming tool is raised, and the trimming posture is adjusted, the third working joint (9-5) is operated to make the hydraulic oil enter the telescopic arm through the second double-acting balance valve (10-2), the telescopic arm is extended, and the cutter is sent to the trimming area, after the cutter is sent to the trimming area, the first working joint (9-3) is operated to make the hydraulic oil enter the trimming tool through the first quick-change joint (14-2), the hydraulic oil of the working oil port T of the trimming tool is cooled in the radiator (2) through the second quick-change joint (14-3), and finally flows back to the hydraulic oil tank (1), and the hydraulic oil of the working oil port L of the trimming tool (15) flows back to the hydraulic oil tank (1) through the third quick-change joint (14-1) to be discharged; When the trimming tool needs large-flow cutting operation, the first electromagnetic unloading valve (4) is powered on, the first electromagnetic unloading valve (4) is closed, the first pressure gauge (6-1) and the second pressure gauge (6-2) are observed to make the overflow pressures of the first hydraulic pump (3-1) and the second hydraulic pump (3-2) the same, and the first hydraulic pump (3-1) delivers oil to the trimming tool through the first one-way valve (7-1) and the first high-pressure filter (8-1) and combines with the hydraulic oil output by the first working joint (9-3), and the cutting speed can be changed by changing the flow output by the first working joint (9-3). When the first hydraulic pump (3-1) and the second hydraulic pump (3-2) fail and stop working, the third hydraulic pump (3-3) is started, the oil liquid passes through the third one-way valve (7-3) and the second high-pressure filter (8-2) to the proportional multi-way valve (9), the second electromagnetic unloading valve (9-1) is powered on, the second electromagnetic unloading valve (9-1) is closed, the third working joint (9-5) is operated to make the hydraulic oil pass through the second double-acting balance valve (10-2) into the telescopic arm telescopic cylinder (12-2) having a rod cavity, and the telescopic arm is retracted; the fourth working joint (9-6) is operated to make the hydraulic oil pass through the third double-acting balance valve (10-3) into the second luffing cylinder (12-3) having no rod cavity, and the telescopic arm is folded; the second working joint (9-4) is operated to make the hydraulic oil pass through the first double-acting balance valve (10-1) into the third luffing cylinder (12-1) having no rod cavity, and the pruning machine tool is lowered; the sixth working joint (9-8) is operated, the oil liquid passes through the fifth double-acting balance valve (11) to drive the motor (13) to rotate the speed reduction mechanism, so that the arm body is turned back to be parallel to the vehicle body; and the fifth working joint (9-7) is operated to make the hydraulic oil pass through the fourth double-acting balance valve (10-4) into the first luffing cylinder (12-4) having a rod cavity, and the oil cylinder is retracted to drive the arm body to be placed in the parking state.

8. The control method of claim 7, wherein, The method comprises the following steps: When the first hydraulic pump (3-1) and the second hydraulic pump (3-2) fail and stop working, the third hydraulic pump (3-3) is started, the oil liquid passes through the third one-way valve (7-3) and the second high-pressure filter (8-2) to the proportional multi-way valve (9), the second electromagnetic unloading valve (9-1) is powered on, the second electromagnetic unloading valve (9-1) is closed, the third working joint (9-5) is operated to make the hydraulic oil pass through the second double-acting balance valve (10-2) into the telescopic arm telescopic cylinder (12-2) having a rod cavity, and the telescopic arm is retracted; the fourth working joint (9-6) is operated to make the hydraulic oil pass through the third double-acting balance valve (10-3) into the second luffing cylinder (12-3) having no rod cavity, and the telescopic arm is folded; the second working joint (9-4) is operated to make the hydraulic oil pass through the first double-acting balance valve (10-1) into the third luffing cylinder (12-1) having no rod cavity, and the pruning machine tool is lowered; the sixth working joint (9-8) is operated, the oil liquid passes through the fifth double-acting balance valve (11) to drive the motor (13) to rotate the speed reduction mechanism, so that the arm body is turned back to be parallel to the vehicle body; and the fifth working joint (9-7) is operated to make the hydraulic oil pass through the fourth double-acting balance valve (10-4) into the first luffing cylinder (12-4) having a rod cavity, and the oil cylinder is retracted to drive the arm body to be placed in the parking state.

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