Hydraulic system for emergency lifting of sweeping roller of high-speed sweeper

Abstract

The invention discloses a hydraulic system for emergency lifting of a sweeping roller of a high-speed sweeper, which comprises the sweeping roller, a sweeping roller emergency lifting hydraulic system part, a sweeping roller normal lifting hydraulic system part, a hydraulic oil tank, an air filter, a liquid level meter, a cooler and an oil return filter, an oil return opening of the sweeping roller and sweeping roller emergency lifting hydraulic system part is communicated with an oil return opening of the sweeping roller normal lifting hydraulic system part and then communicated with an oil inlet of the cooler, and an oil outlet of the cooler is connected with the oil return filter in series and then communicated with an oil return opening of the hydraulic oil tank. And one oil suction port of the hydraulic oil tank is communicated with oil inlets of the sweeping roller and the sweeping roller emergency lifting hydraulic system part. Automatic switching can be carried out when the sweeping roller works, does not work and is lifted for emergency obstacle avoidance, energy conservation, emission reduction, cost reduction and efficiency improvement are achieved, and meanwhile the problem that the sweeping roller cannot avoid large obstacles when the sweeping vehicle carries out sweeping work in the high-speed running process is solved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic systems for road construction machinery, and in particular to a hydraulic system for emergency lifting of a sweeping roller of a high-speed sweeper. Background Art

[0002] With the acceleration of urbanization, road cleaning and maintenance have become an important part of urban management. As a special vehicle used for cleaning roads and public areas, the market demand for road sweepers continues to increase. When performing cleaning work, the road sweeper needs to lower the sweeping roller to contact the ground. The sweeping roller rotates to roll up the garbage on the ground and then suck the garbage into the trash can. Among them, the cleaning and maintenance of highways have higher requirements for road sweepers, especially in terms of driving speed. The minimum speed limit on highways is 60km / h. When performing cleaning operations on highways, if a large obstacle is encountered and the sweeping roller of the road sweeper cannot be lifted in time, it will be extremely dangerous and traffic accidents are very likely to occur. Summary of the invention

[0003] The present invention proposes a hydraulic system for emergency lifting of the sweeping roller of a high-speed road sweeper, aiming to solve the problem that the sweeping roller cannot avoid large obstacles when the road sweeper is performing cleaning work at high speed, while achieving the purpose of energy saving, emission reduction, cost reduction and efficiency improvement.

[0004] The technical solution of the present invention is achieved in this way:

[0005] A hydraulic system for emergency lifting of a sweeping roller of a high-speed sweeper comprises a sweeping roller and a sweeping roller emergency lifting hydraulic system part, a sweeping roller normal lifting hydraulic system part, a hydraulic oil tank, an air filter, a liquid level gauge, a cooler and an oil return filter. The return oil of the sweeping roller and the sweeping roller emergency lifting hydraulic system part is connected to the return oil of the sweeping roller normal lifting hydraulic system part and then connected to the oil inlet of the cooler. The oil outlet of the cooler is connected in series with the oil return filter and then connected to the oil return port of the hydraulic oil tank. An oil suction port of the hydraulic oil tank is connected to the oil inlet of the sweeping roller and the sweeping roller emergency lifting hydraulic system part.

[0006] Preferably, the sweeping roller and sweeping roller emergency lifting hydraulic system part includes a sweeping roller and sweeping roller emergency lifting hydraulic valve block, a sweeping roller one-way valve, a sweeping roller motor, a sweeping roller lifting actuator, a sweeping roller and sweeping roller emergency lifting one-way valve, a hydraulic pump and an oil suction filter. The low-pressure oil suction port of the hydraulic pump is connected in series with the oil suction filter and then connected to the hydraulic oil tank. The high-pressure oil discharge port of the hydraulic pump is connected in series with the sweeping roller and sweeping roller emergency lifting one-way valve and then connected to the oil inlet P of the sweeping roller and sweeping roller emergency lifting hydraulic valve block. The B1 port of the sweeping roller and sweeping roller emergency lifting hydraulic valve block is connected to the oil outlet of the sweeping roller one-way valve. The B2 port of the sweeping roller and sweeping roller emergency lifting hydraulic valve block is connected to the oil inlet of the sweeping roller motor.

[0007] Preferably, the sweeping roller lifting actuator includes a first sweeping roller lifting cylinder and a second sweeping roller lifting cylinder. The rodless chamber oil ports of the first sweeping roller lifting cylinder and the second sweeping roller lifting cylinder are connected to each other and divided into two paths. The rod chamber oil ports of the first sweeping roller lifting cylinder and the second sweeping roller lifting cylinder are also connected to each other and divided into two paths.

[0008] Preferably, a sweeping roller emergency lifting hydraulic valve group part and a sweeping roller hydraulic valve group part are superimposed on the sweeping roller and the sweeping roller emergency lifting hydraulic valve block.

[0009] Preferably, the sweeping roller emergency lifting hydraulic valve group includes an emergency lifting electromagnetic reversing valve, an emergency lifting superimposed two-way hydraulically controlled one-way valve and a sweeping roller and sweeping roller emergency lifting superimposed overflow valve. The B port of the emergency lifting electromagnetic reversing valve is connected to the oil outlet of the sweeping roller one-way valve through the B1 port of the sweeping roller and sweeping roller emergency lifting hydraulic valve block, the first path of the rodless chamber oil port of the first sweeping roller lifting cylinder and the second sweeping roller lifting cylinder is connected to the oil inlet of the sweeping roller one-way valve, and the first path of the rod chamber oil port of the first sweeping roller lifting cylinder and the second sweeping roller lifting cylinder is connected to the A port of the emergency lifting electromagnetic reversing valve through the A1 port of the sweeping roller and sweeping roller emergency lifting hydraulic valve block.

[0010] Preferably, the sweeping roller hydraulic valve group includes a sweeping roller electromagnetic reversing valve and a sweeping roller superimposed double one-way throttle valve. The B port of the sweeping roller electromagnetic reversing valve is connected to the oil inlet of the sweeping roller motor through the B2 port of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block, and the oil outlet of the sweeping roller motor is connected to the A port of the sweeping roller electromagnetic reversing valve through the A2 port of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block.

[0011] Preferably, the normal lifting hydraulic system of the sweeping roller includes a sweeping roller lifting electromagnetic reversing valve, a sweeping roller lifting superimposed double one-way throttle valve, a sweeping roller lifting electric control one-way valve and a sweeping roller lifting valve block. The second path of the rodless chamber oil port of the first sweeping roller lifting cylinder and the second sweeping roller lifting cylinder is connected to the A port of the sweeping roller lifting electromagnetic reversing valve through the A port of the sweeping roller lifting valve block, and the second path of the rod chamber oil port of the first sweeping roller lifting cylinder and the second sweeping roller lifting cylinder is connected to the B port of the sweeping roller lifting electromagnetic reversing valve through the B port of the sweeping roller lifting valve block.

[0012] Preferably, the T-ports of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block are connected to the T-port of the sweeping roller lifting valve block and then connected to the oil inlet of the cooler.

[0013] Beneficial effects:

[0014] The present invention can automatically switch between when the sweeping roller is working, when it is not working, and when it is lifted for emergency obstacle avoidance. While saving energy and reducing emissions, reducing costs and increasing efficiency, it solves the problem that the sweeping roller cannot avoid larger obstacles when the sweeper is performing cleaning work at high speed.

[0015] When normal cleaning operations are required, the sweeping roller lifting electromagnetic reversing valve coil is energized to switch it to the left or right position, and the hydraulic oil can flow in the circuit, so as to realize normal lifting and lowering control of the first sweeping roller lifting cylinder and the second sweeping roller lifting cylinder, and control the sweeping roller to descend to continue working after the emergency obstacle avoidance action is completed.

[0016] By controlling the power supply to the sweeping roller lifting electric control one-way valve to keep the valve core in the left position, and energizing the left coil of the sweeping roller lifting electromagnetic reversing valve, the sweeping roller can fall to the ground and work normally. At this time, the sweeping roller lifting electromagnetic reversing valve is de-energized to keep the valve core in the middle position. During the cleaning operation, the sweeping roller can float freely up and down with the undulations of the road surface, ensuring the safety of the hydraulic components and mechanical structures and increasing the service life of the hydraulic components.

[0017] When the sweeping roller does not need to work, the right coil of the sweeping roller lifting electromagnetic reversing valve is energized to retract the first sweeping roller lifting cylinder and the second sweeping roller lifting cylinder. After the sweeping roller is in place, the power-on signal of the sweeping roller lifting electromagnetic reversing valve is cut off to keep the valve core in the middle position. At this time, the electric signal of the sweeping roller lifting electric control check valve is cut off to restore the valve core to the right position, which can lock the first sweeping roller lifting cylinder and the second sweeping roller lifting cylinder to ensure that they do not fall, thereby improving the safety of the whole machine. The emergency lifting superimposed two-way hydraulic control check valve can prevent the control oil of the normal lifting of the sweeping roller from entering the sweeping roller and the sweeping roller emergency lifting hydraulic system and prevent the sweeping roller from accidentally falling when it is not working and lifted in place.

[0018] When the sweeping roller needs to be lifted up for emergency obstacle avoidance, the sweeping roller electromagnetic reversing valve and the sweeping roller lifting electric control one-way valve are de-energized by pressing the emergency lifting button, and the emergency lifting electromagnetic reversing valve is energized in the left position, so that the oil path leading to the rod chamber side of the hydraulic cylinder is connected, so that the first sweeping roller lifting cylinder and the second sweeping roller lifting cylinder complete the rapid contraction within 2 seconds, thereby completing the sweeping roller emergency obstacle avoidance lifting action. Here, the sweeping roller lifting electric control one-way valve can prevent the hydraulic oil from flowing back into the normal lifting hydraulic system of the sweeping roller when the sweeping roller performs an emergency lifting action when it is not energized, thereby unloading the sweeping roller and the sweeping roller emergency lifting hydraulic system. When the emergency obstacle avoidance action is completed, the emergency lifting button is reset, and the emergency lifting electromagnetic reversing valve is energized in the right position to establish the sweeping roller working pressure, and the sweeping roller electromagnetic reversing valve in the normal lifting hydraulic system of the sweeping roller is energized in the left position to make the sweeping roller descend so as to continue the cleaning work.

[0019] The return oil filter can filter the particles in the hydraulic oil to a certain extent. Maintaining the cleanliness of the system helps reduce system failures and improve the reliability and overall performance of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 The present invention is a schematic diagram of a hydraulic system for emergency lifting of a sweeping roller of a high-speed sweeper according to an embodiment of the present invention.

[0022] In the figure, 100, sweeping roller and sweeping roller emergency lifting hydraulic system part; 110, emergency lifting electromagnetic reversing valve; 111, emergency lifting superimposed two-way hydraulic control one-way valve; 112, sweeping roller and sweeping roller emergency lifting superimposed overflow valve; 113, sweeping roller one-way valve; 120, sweeping roller electromagnetic reversing valve; 121, sweeping roller superimposed double one-way throttle valve; 122, sweeping roller motor; 130, sweeping roller and sweeping roller emergency lifting hydraulic valve block; 1401, the first sweeping roller lifting cylinder; 1402, the first Two sweeping roller lifting cylinders; 150, sweeping roller and sweeping roller emergency lifting one-way valve; 160, hydraulic pump; 170, oil suction filter; 200, sweeping roller normal lifting hydraulic system part; 210, sweeping roller lifting solenoid reversing valve; 220, sweeping roller lifting superimposed double one-way throttle valve; 230, sweeping roller lifting electric control one-way valve; 240, sweeping roller lifting valve block; 300, hydraulic oil tank; 400, air filter; 500, liquid level meter; 600, cooler; 700, return oil filter. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0024] According to an embodiment of the present invention, a hydraulic system for emergency lifting of a sweeping roller of a high-speed sweeper is provided.

[0025] like Figure 1As shown, it includes a sweeping roller and a sweeping roller emergency lifting hydraulic system part 100, a sweeping roller normal lifting hydraulic system part 200, a hydraulic oil tank 300, an air filter 400, a liquid level meter 500, a cooler 600 and an oil return filter 700. The return oil of the sweeping roller and the sweeping roller emergency lifting hydraulic system part 100 is connected to the return oil of the sweeping roller normal lifting hydraulic system part 200 and then connected to the oil inlet of the cooler 600. The oil outlet of the cooler 600 is connected in series with the oil return filter 700 and then connected to the oil return port of the hydraulic oil tank 300. An oil suction port of the hydraulic oil tank 300 is connected to the oil inlet of the sweeping roller and the sweeping roller emergency lifting hydraulic system part 100. The sweeping roller and the sweeping roller emergency lifting hydraulic system part 100 are used to complete the sweeping roller emergency lifting obstacle avoidance and drive the sweeping roller to rotate for cleaning. The sweeping roller normal lifting hydraulic system part 200 is used to complete the normal lifting action of the sweeping roller.

[0026] In this optional embodiment, the sweeping roller and sweeping roller emergency lifting hydraulic system part 100 includes a sweeping roller and sweeping roller emergency lifting hydraulic valve block 130, a sweeping roller one-way valve 113, a sweeping roller motor 122, a sweeping roller lifting actuator, a sweeping roller and sweeping roller emergency lifting one-way valve 150, a hydraulic pump 160 and an oil suction filter 170. The low-pressure oil suction port of the hydraulic pump 160 is connected in series with the oil suction filter 170 and then communicated with the hydraulic oil tank 300. The oil suction filter 170 can prevent the oil pump and other hydraulic components from malfunctioning due to the inhalation of contaminated impurities, thereby ensuring the normal operation of the hydraulic system and extending the service life of the components. The high-pressure oil discharge port of the hydraulic pump 160 is connected in series with the sweeping roller and sweeping roller emergency lifting one-way valve 150 and then communicated with the The sweeping roller and the sweeping roller emergency lifting hydraulic valve block 130 are connected to the oil inlet P to provide hydraulic power to the sweeping roller and the sweeping roller emergency lifting hydraulic system part 100. To ensure the safety of the hydraulic pump 160, a sweeping roller and the sweeping roller emergency lifting one-way valve 150 is connected in series between the hydraulic pump 160 and the sweeping roller and the sweeping roller emergency lifting hydraulic valve block 130. The sweeping roller and the sweeping roller emergency lifting one-way valve 150 can prevent the hydraulic oil from flowing back into the hydraulic pump 160, and can protect the sweeping roller and the sweeping roller emergency lifting hydraulic pump from impact. The B1 port of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block 130 is connected to the oil outlet of the sweeping roller one-way valve 113, and the B2 port of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block 130 is connected to the oil inlet of the sweeping roller motor 122.

[0027] Preferably, the sweeping roller lifting actuator includes a first sweeping roller lifting cylinder 1401 and a second sweeping roller lifting cylinder 1402, and the rodless chamber oil ports of the first sweeping roller lifting cylinder 1401 and the second sweeping roller lifting cylinder 1402 are connected to each other and divided into two paths, and the rod chamber oil ports of the first sweeping roller lifting cylinder 1401 and the second sweeping roller lifting cylinder 1402 are connected to each other and also divided into two paths.

[0028] In this optional embodiment, a sweeping roller emergency lifting hydraulic valve group part and a sweeping roller hydraulic valve group part are superimposed on the sweeping roller and the sweeping roller emergency lifting hydraulic valve block 130 .

[0029] In this optional embodiment, the sweeping roller emergency lifting hydraulic valve group includes an emergency lifting electromagnetic reversing valve 110, an emergency lifting superimposed two-way hydraulically controlled one-way valve 111, and a sweeping roller and a sweeping roller emergency lifting superimposed overflow valve 112. A sweeping roller and a sweeping roller emergency lifting superimposed overflow valve 112 are superimposed in the sweeping roller emergency lifting hydraulic valve group to limit the maximum pressure of the sweeping roller and the sweeping roller emergency lifting hydraulic system. When the sweeping roller is caught in debris and is stuck and cannot rotate, causing the pressure to increase, the sweeping roller and the sweeping roller emergency lifting hydraulic system are protected from damage by high pressure. The set pressure value is 80 bar. The emergency lifting superimposed two-way hydraulically controlled one-way valve 111 can ensure that the sweeping roller remains in a lifted state and does not drop when the sweeper is not working; the rotation speed of the sweeping roller motor 122 can be adjusted by adjusting the sweeping roller superimposed double one-way throttle valve 121. The B port of the lifting electromagnetic reversing valve 110 is connected to the oil outlet of the sweeping roller one-way valve 113 through the B1 port of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block 130, the first path of the rodless chamber oil port of the first sweeping roller lifting cylinder 1401 and the second sweeping roller lifting cylinder 1402 is connected to the oil inlet of the sweeping roller one-way valve 113, the first path of the rod chamber oil port of the first sweeping roller lifting cylinder 1401 and the second sweeping roller lifting cylinder 1402 is connected to the A port of the emergency lifting electromagnetic reversing valve 110 through the A1 port of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block 130, the emergency lifting electromagnetic reversing valve 110 is an H-type three-position four-way electromagnetic reversing valve, which can unload the entire sweeping roller and the sweeping roller emergency lifting hydraulic system part 100 when it is not energized and is in the middle position, so that the hydraulic pump can be started without load and reduce energy consumption.

[0030] In this optional embodiment, the sweeping roller hydraulic valve group includes a sweeping roller electromagnetic reversing valve 120 and a sweeping roller superimposed double one-way throttle valve 121. The B port of the sweeping roller electromagnetic reversing valve 120 is connected to the oil inlet of the sweeping roller motor 122 through the B2 port of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block 130. The oil outlet of the sweeping roller motor 122 is connected to the A port of the sweeping roller electromagnetic reversing valve 120 through the A2 port of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block 130. The sweeping roller electromagnetic reversing valve 120 is a Y-type electromagnetic reversing valve. The valve switches the emergency lifting electromagnetic reversing valve 110 to the right position when working. At this time, the B1 port of the lifting hydraulic valve group is a high-pressure oil outlet. Because a sweeping roller check valve 113 is connected in series at the B1 port of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block 130, the B1 port is blocked, and the emergency lifting electromagnetic reversing valve 110 loses its unloading function. The sweeping roller and the sweeping roller emergency lifting hydraulic system can build up working pressure. At this time, the sweeping roller electromagnetic reversing valve 120 is switched to the left or right position, and the sweeping roller motor 122 can be controlled to work forward or reverse. Due to the cut-off effect of the emergency lifting check valve 113, the first sweeping roller lifting cylinder 1401 and the second sweeping roller lifting cylinder 1402 will not act because the emergency lifting electromagnetic reversing valve 110 is switched to the right position.

[0031] In this optional embodiment, the normal lifting hydraulic system part 200 of the sweeping roller includes a sweeping roller lifting electromagnetic reversing valve 210 with a Y-type mid-position function, a sweeping roller lifting superimposed double one-way throttle valve 220, a sweeping roller lifting electric control one-way valve 230 and a sweeping roller lifting valve block 240. The second path of the rodless chamber oil port of the first sweeping roller lifting cylinder 1401 and the second sweeping roller lifting cylinder 1402 is connected to the A port of the sweeping roller lifting electromagnetic reversing valve 210 through the A port of the sweeping roller lifting valve block 240, and the second path of the rod chamber oil port of the first sweeping roller lifting cylinder 1401 and the second sweeping roller lifting cylinder 1402 is connected to the B port of the sweeping roller lifting electromagnetic reversing valve 210 through the B port of the sweeping roller lifting valve block 240.

[0032] When normal cleaning operations are required, the sweeping roller lifting electromagnetic reversing valve 210 coil is energized to switch it to the left or right position, and the hydraulic oil can flow in the circuit, thereby realizing normal lifting and lowering control of the first sweeping roller lifting cylinder 1401 and the second sweeping roller lifting cylinder 1402, and controlling the sweeping roller to descend after the emergency obstacle avoidance action is completed to continue working.

[0033] By controlling the power supply to the sweeping roller lifting electric control one-way valve 230 to keep its valve core in the left position, and energizing the left coil of the sweeping roller lifting electromagnetic reversing valve 210, the sweeping roller can fall to the ground and work normally. At this time, the sweeping roller lifting electromagnetic reversing valve 210 is de-energized to keep its valve core in the middle position, so that the sweeping roller can float freely up and down with the undulations of the road surface during the cleaning operation, thereby ensuring the safety of the hydraulic components and mechanical structures and increasing the service life of the hydraulic components.

[0034] When the sweeping roller does not need to work, the right coil of the sweeping roller lifting electromagnetic reversing valve 210 is energized to retract the first sweeping roller lifting cylinder 1401 and the second sweeping roller lifting cylinder 1402. After the sweeping roller is in place, the power-on signal of the sweeping roller lifting electromagnetic reversing valve 210 is cut off to keep the valve core in the middle position. At this time, the electric signal of the sweeping roller lifting electric control check valve 230 is cut off to restore the valve core to the right position, which can lock the first sweeping roller lifting cylinder 1401 and the second sweeping roller lifting cylinder 1402 to ensure that they do not fall, thereby improving the safety of the whole machine. The emergency lifting superimposed two-way hydraulic control check valve 111 can prevent the control oil of the normal lifting of the sweeping roller from entering the sweeping roller and the sweeping roller emergency lifting hydraulic system part 100 and prevent the sweeping roller from accidentally falling when it is not working and lifted in place.

[0035] When the sweeping roller needs to be lifted in an emergency obstacle avoidance action, the sweeping roller electromagnetic reversing valve 120 and the sweeping roller lifting electric control one-way valve 230 are both de-energized by pressing the emergency lift button, and the emergency lift electromagnetic reversing valve 110 is energized in the left position, so that the oil path leading to the rod chamber side of the hydraulic cylinder is connected, so that the first sweeping roller lifting cylinder 1401 and the second sweeping roller lifting cylinder 1402 complete the rapid contraction within 2 seconds, thereby completing the sweeping roller emergency obstacle avoidance lifting action. Here, the sweeping roller lifting electric control one-way valve 230 can prevent the hydraulic oil from flowing back into the sweeping roller normal lifting hydraulic system part 200 when the sweeping roller performs an emergency lifting action when it is not energized, so as to unload the sweeping roller and the sweeping roller emergency lifting hydraulic system part 100. When the emergency obstacle avoidance action is completed, the emergency lift button is operated to reset, and at this time, the emergency lift electromagnetic reversing valve 110 resumes the right position to energize to establish the sweeping roller working pressure, and at the same time, the sweeping roller electromagnetic reversing valve 120 in the sweeping roller normal lifting hydraulic system part 200 is energized in the left position to make the sweeping roller descend so as to continue the cleaning work.

[0036] The return oil filter 700 can filter particles in the hydraulic oil to a certain extent. Maintaining the cleanliness of the system helps reduce system failures and improve system reliability and overall performance.

[0037] In this optional embodiment, the T port of the sweeping roller and sweeping roller emergency lifting hydraulic valve block 130 is connected to the T port of the sweeping roller lifting valve block 240 and then connected to the oil inlet of the cooler 600. The oil outlet of the cooler 600 is connected in series with the return oil filter 700 and then connected to the hydraulic oil tank 300. The return oil of the sweeping roller and sweeping roller emergency lifting hydraulic system 100 is connected to the radiator 600 through the return oil port T of the sweeping roller and sweeping roller emergency lifting hydraulic valve block 130 through a pipeline.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic system for emergency lifting of the sweeping roller of a high-speed sweeper, characterized in that: The invention comprises a sweeping roller and a sweeping roller emergency lifting hydraulic system part (100), a sweeping roller normal lifting hydraulic system part (200), a hydraulic oil tank (300), an air filter (400), a liquid level meter (500), a cooler (600) and an oil return filter (700); the oil return port of the sweeping roller and the sweeping roller emergency lifting hydraulic system part (100) is connected to the oil return port of the sweeping roller normal lifting hydraulic system part (200) and then connected to the oil inlet of the cooler (600); the oil outlet of the cooler (600) is connected in series with the oil return filter (700) and then connected to the oil return port of the hydraulic oil tank (300); an oil suction port of the hydraulic oil tank (300) is connected to the oil inlet of the sweeping roller and the sweeping roller emergency lifting hydraulic system part (100).

2. A hydraulic system for emergency lifting of the sweeping roller of a high-speed sweeper according to claim 1, characterized in that: The sweeping roller and sweeping roller emergency lifting hydraulic system part (100) comprises a sweeping roller and sweeping roller emergency lifting hydraulic valve block (130), a sweeping roller check valve (113), a sweeping roller motor (122), a sweeping roller lifting actuator, a sweeping roller and sweeping roller emergency lifting check valve (150), a hydraulic pump (160) and an oil suction filter (170); a low-pressure oil suction port of the hydraulic pump (160) is connected in series with the oil suction filter (170) and then connected to the hydraulic oil tank (300). The high-pressure oil discharge port of the hydraulic pump (160) is connected in series with the sweeping roller and the sweeping roller emergency lifting one-way valve (150) and then communicated with the oil inlet P of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block (130); the B1 port of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block (130) is communicated with the oil outlet of the sweeping roller one-way valve (113); and the B2 port of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block (130) is communicated with the oil inlet of the sweeping roller motor (122).

3. A hydraulic system for emergency lifting of the sweeping roller of a high-speed sweeper according to claim 2, characterized in that: The sweep roller lifting actuator comprises a first sweep roller lifting cylinder (1401) and a second sweep roller lifting cylinder (1402); the rodless chamber oil ports of the first sweep roller lifting cylinder (1401) and the second sweep roller lifting cylinder (1402) are connected to each other and are divided into two paths; the rod chamber oil ports of the first sweep roller lifting cylinder (1401) and the second sweep roller lifting cylinder (1402) are connected to each other and are also divided into two paths.

4. A hydraulic system for emergency lifting of the sweeping roller of a high-speed sweeper according to claim 3, characterized in that: The sweeping roller and the sweeping roller emergency lifting hydraulic valve block (130) are superimposed with a sweeping roller emergency lifting hydraulic valve group part and a sweeping roller hydraulic valve group part.

5. A hydraulic system for emergency lifting of the sweeping roller of a high-speed sweeper according to claim 4, characterized in that: The sweep roller emergency lifting hydraulic valve group comprises an emergency lifting electromagnetic reversing valve (110), an emergency lifting superimposed bidirectional hydraulically controlled non-return valve (111), and a sweep roller and sweep roller emergency lifting superimposed overflow valve (112); the B port of the emergency lifting electromagnetic reversing valve (110) is connected to the oil outlet of the sweep roller non-return valve (113) through the B1 port of the sweep roller and sweep roller emergency lifting hydraulic valve block (130); the first path of the rodless chamber oil port of the first sweep roller lifting cylinder (1401) and the second sweep roller lifting cylinder (1402) is connected to the oil inlet of the sweep roller non-return valve (113); the first path of the rod chamber oil port of the first sweep roller lifting cylinder (1401) and the second sweep roller lifting cylinder (1402) is connected to the A port of the emergency lifting electromagnetic reversing valve (110) through the A1 port of the sweep roller and sweep roller emergency lifting hydraulic valve block (130).

6. A hydraulic system for emergency lifting of the sweeping roller of a high-speed sweeper according to claim 5, characterized in that: The sweeping roller hydraulic valve group comprises a sweeping roller electromagnetic reversing valve (120) and a sweeping roller superimposed double one-way throttle valve (121); the B port of the sweeping roller electromagnetic reversing valve (120) is connected to the oil inlet of the sweeping roller motor (122) via the B2 port of the sweeping roller and sweeping roller emergency lifting hydraulic valve block (130); and the oil outlet of the sweeping roller motor (122) is connected to the A port of the sweeping roller electromagnetic reversing valve (120) via the A2 port of the sweeping roller and sweeping roller emergency lifting hydraulic valve block (130).

7. A hydraulic system for emergency lifting of the sweeping roller of a high-speed sweeper according to claim 6, characterized in that: The normal sweeping roller lifting hydraulic system part (200) comprises a sweeping roller lifting electromagnetic reversing valve (210), a sweeping roller lifting superimposed double one-way throttle valve (220), a sweeping roller lifting electric control one-way valve (230) and a sweeping roller lifting valve block (240); the second path of the rodless chamber oil port of the first sweeping roller lifting cylinder (1401) and the second sweeping roller lifting cylinder (1402) is connected to the A port of the sweeping roller lifting electromagnetic reversing valve (210) through the A port of the sweeping roller lifting valve block (240); the second path of the rod chamber oil port of the first sweeping roller lifting cylinder (1401) and the second sweeping roller lifting cylinder (1402) is connected to the B port of the sweeping roller lifting electromagnetic reversing valve (210) through the B port of the sweeping roller lifting valve block (240).

8. The hydraulic system for emergency lifting of the sweeping roller of a high-speed sweeper according to claim 7, characterized in that: The T-port of the sweeping roller and the sweeping roller emergency lifting hydraulic valve block (130) is connected to the T-port of the sweeping roller lifting valve block (240) and then connected to the oil inlet of the cooler (600).

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