A hydraulic control system for a vehicle-mounted cleaning and suction device
By connecting a gear pump and an independent hydraulic control unit in series, and combining a proportional directional speed control valve and a solenoid directional valve, the problem of low efficiency of manual adjustment in the hydraulic system of the vehicle-mounted cleaning and sewage suction device is solved, achieving intelligent adjustment and power saving.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING ENDURANCE SHANHUA ESPECIAL VECHICLE CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-21
Smart Images
Figure CN224533102U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle-mounted cleaning and vacuuming devices, specifically to a hydraulic system for a vehicle-mounted cleaning and vacuuming device. Background Technology
[0002] Vehicle-mounted cleaning and vacuuming systems include devices for high-pressure cleaning of sewers and devices for powerful vacuuming. Vehicle-mounted high-pressure cleaning systems currently often use an engine as the power source for a gear pump. The gear pump provides pressurized oil, which drives a cycloidal motor via a reversing valve to rotate, thus enabling the cleaning reel to retract and unload. During the process of the reversing valve driving the cycloidal motor, manual adjustment of the reversing valve is required, resulting in low efficiency. Vehicle-mounted powerful vacuuming systems currently often use an engine as the power source for a gear pump. The gear pump provides pressurized oil, which drives a rotating arm via a reversing valve. The hydraulic system of this type of vacuuming system uses one oil pump to control one valve group, with each valve group connected in parallel. This prevents the valve groups from operating simultaneously or causes valve group shunting. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a hydraulic control system for a vehicle-mounted cleaning and vacuuming device. This hydraulic control system enables intelligent adjustment of the high-pressure cleaning reel's winding and unwinding speed.
[0004] The purpose of this utility model is achieved by the following solution: a hydraulic control system for a vehicle-mounted cleaning and sludge suction device, including a power supply unit, a cleaning reel hydraulic control unit, a sludge suction arm hydraulic control unit, a mud-water separation hydraulic control unit, a cylinder and a sludge pump hydraulic control unit, and an oil cooling unit. The power supply unit includes a fuel tank, an engine, a broken shaft power take-off, and three gear pumps. The engine is located above the fuel tank. The engine is connected to the broken shaft power take-off. The broken shaft power take-off is connected to a gear pump. The three gear pumps are connected in series. The cleaning reel hydraulic control unit includes a proportional directional speed control valve, a first relief valve, a first solenoid directional valve, a cycloidal motor, a brake, and hydraulic lines connecting each part. The first relief valve, the first solenoid directional valve, and the proportional directional speed control valve are connected in parallel through hydraulic lines. The proportional directional speed control valve is connected to the cycloidal motor through hydraulic lines. The cycloidal motor and the brake are connected in parallel. The P port of the cleaning reel hydraulic control unit is connected to a gear pump through hydraulic lines. The T port of the cleaning reel hydraulic control unit returns oil to the oil tank through hydraulic lines. The hydraulic control unit for the suction arm includes a swivel arm motor valve assembly and a swivel arm cylinder valve assembly. The swivel arm motor valve assembly and the swivel arm cylinder valve assembly are connected in series via hydraulic lines. The swivel arm motor valve assembly includes a second relief valve and a second solenoid directional valve. The second relief valve and the second solenoid directional valve are connected in parallel via hydraulic lines. The second solenoid directional valve is connected to the swivel arm motor via hydraulic lines. The swivel arm cylinder valve assembly includes a telescopic cylinder and a tilt cylinder. The outlet and inlet of the telescopic cylinder are connected to the two ends of a third solenoid directional valve via hydraulic lines. The outlet and inlet of the tilt cylinder are connected to a first one-way throttle valve via hydraulic lines. The first one-way throttle valve is connected in parallel with a fourth solenoid directional valve via hydraulic lines. The fourth solenoid directional valve is connected in parallel with the third relief valve via hydraulic lines. The P port of the hydraulic control unit for the suction arm returns oil to the oil tank via hydraulic lines. The hydraulic control unit for the suction arm is connected to the suction arm via hydraulic lines. The sludge-water separation hydraulic control unit includes a sludge-water separation motor, a fourth overflow valve, and a fifth solenoid directional valve. The fourth overflow valve and the fifth solenoid directional valve are connected in parallel via hydraulic lines. The sludge-water separation motor and the fourth overflow valve are connected in parallel via hydraulic lines. The P port of the sludge-water separation hydraulic control unit is connected to a gear pump via a hydraulic line. The T port of the sludge-water separation hydraulic control unit returns oil to the oil tank via a hydraulic line. The sludge-water separation hydraulic control unit is connected in series with the swivel arm motor valve group in the suction swivel arm hydraulic control unit. The hydraulic control unit for the cylinder and sewage pump includes a sewage pump opening valve group, a sewage pump closing valve group, an unlocking valve group, a tank cover valve group, and a lifting valve group, all connected in parallel. The sewage pump opening valve group includes a fifth relief valve and a sixth solenoid directional valve, which are connected in series via hydraulic lines. The sewage pump closing valve group includes a sewage pump and a seventh solenoid directional valve, which are connected in series via hydraulic lines. The unlocking valve group includes an unlocking cylinder, whose outlet and inlet are connected to a second one-way throttle valve via hydraulic lines. The second one-way throttle valve is connected in series with an eighth solenoid directional valve via hydraulic lines. The tank cover valve group includes a tank cover cylinder, whose inlet and outlet are connected to a one-way valve via hydraulic lines. The one-way valve is connected in series with a second one-way throttle valve via hydraulic lines. The second one-way throttle valve is connected in series with a ninth solenoid directional valve via hydraulic lines. The lifting valve assembly includes a lifting cylinder. The oil outlet and oil inlet of the lifting cylinder are respectively connected to a second one-way throttle valve through hydraulic lines. A one-way valve is installed between the oil inlet of the lifting cylinder and the second one-way throttle valve. The second one-way throttle valve and the tenth solenoid directional valve are connected in series through hydraulic lines. The tenth solenoid directional valve is connected in parallel with the sixth relief valve through hydraulic lines. The P port of the hydraulic control unit of the cylinder and the sewage pump is connected to a gear pump through hydraulic lines. The T port of the hydraulic control unit of the cylinder and the sewage pump returns oil to the oil tank through hydraulic lines. The oil cooling unit includes a cooler, which is connected to the oil return line of the oil tank.
[0005] An oil suction filter is installed between the oil tank and the gear pump.
[0006] An oil return filter is installed between the oil tank and the cooler.
[0007] An air filter and a liquid level thermometer are installed in the oil tank.
[0008] A first throttle valve is installed between the return oil line of the suction boom hydraulic control unit and the return oil line of the mud-water separation hydraulic control unit.
[0009] The seventh electromagnetic directional valve in the sewage pump shut-off valve group of the hydraulic control unit for the oil cylinder and sewage pump is connected in series with the second throttle valve through a hydraulic pipeline.
[0010] The proportional directional control valve, the second electromagnetic directional valve, the third electromagnetic directional valve, the fourth electromagnetic directional valve, the fifth electromagnetic directional valve, the eighth electromagnetic directional valve, the ninth electromagnetic directional valve, and the tenth electromagnetic directional valve are three-position four-way directional valves.
[0011] The first electromagnetic directional valve, the sixth electromagnetic directional valve, and the seventh electromagnetic directional valve are two-position four-way directional valves.
[0012] The advantages of this invention are that the gear pumps in this hydraulic control system are connected in series, influencing each other while remaining relatively independent, thus saving power. The hydraulic control unit of the cleaning reel judges the current working condition by the pressure value and the reel speed and adjusts the electrical signal of the proportional directional speed control valve accordingly, achieving intelligent adjustment, avoiding manual adjustment, and improving work efficiency. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the hydraulic control system of this utility model; Figure 2 Schematic diagram of the power supply unit and oil cooling unit; Figure 3 Schematic diagram of the hydraulic control unit for cleaning reels; Figure 4 Schematic diagram of the hydraulic control unit for the suction boom; Figure 5 Schematic diagram of the hydraulic control unit for mud-water separation; Figure 6 This is a schematic diagram of the hydraulic control unit for the oil cylinder and sewage pump. Detailed Implementation
[0014] like Figures 1 to 6As shown, a hydraulic control system for a vehicle-mounted cleaning and sludge suction device includes a power supply unit 6, a cleaning reel hydraulic control unit 4, a sludge suction arm hydraulic control unit 3, a mud-water separation hydraulic control unit 2, a cylinder and sludge pump hydraulic control unit 1, and an oil cooling unit 5. The power supply unit includes an oil tank 69, an engine 61, a broken shaft power take-off 62, and three gear pumps 63. The engine 61 is located above the oil tank and is connected to the broken shaft power take-off 62. The broken shaft power take-off 62 is connected to one gear pump 63, and the three gear pumps 63 are connected in series. An oil suction filter 68 is provided between the oil tank 69 and the gear pumps 63. The cleaning reel hydraulic control unit 4 includes a proportional directional speed control valve 43, a first relief valve 41, a first solenoid directional valve 42, a cycloidal motor 45, a brake 44, and hydraulic lines connecting these components. The first relief valve 41, the first solenoid directional valve 42, and the proportional directional speed control valve 43 are connected in parallel via hydraulic lines. The proportional directional speed control valve 43 is connected to the cycloidal motor 45 via hydraulic lines. The cycloidal motor 45 and the brake 44 are connected in parallel. The P port of the cleaning reel hydraulic control unit 4 is connected to a gear pump 63 via hydraulic lines. The T port of the cleaning reel hydraulic control unit 4 returns oil to the oil tank 69 via hydraulic lines. The first solenoid directional valve 42 controls the on / off state of the P port to the T port. The brake 44 prevents the reel from rotating naturally. The proportional directional speed control valve 43... 3. Control the rotation direction of the cycloidal motor 45 and adjust the running speed of the cycloidal motor 45 to achieve the purpose of controlling the rotation direction and speed of the cleaning reel; the suction arm hydraulic control unit 3 includes a cycloidal arm motor valve group and a cycloidal arm cylinder valve group, which are connected in series through hydraulic pipelines. The cycloidal arm motor valve group includes a second relief valve 32 and a second solenoid directional valve 33, which are connected in parallel through hydraulic pipelines. The second solenoid directional valve 33 is connected to the cycloidal arm motor 310 through hydraulic pipelines. The second relief valve 32 controls the pressure of the suction arm hydraulic control unit 3 to ensure that the pressure of the cycloidal arm hydraulic system is within a suitable pressure range. The second solenoid directional valve 33 controls the rotation direction of the cycloidal arm motor 310. The boom cylinder valve assembly includes a telescopic cylinder 34 and a pitch cylinder 39. The left side of the arrow on the telescopic cylinder 34 indicates retraction, and the right side indicates extension. The left side of the arrow on the pitch cylinder 39 indicates pitching, and the right side indicates elevation. The oil outlet and oil inlet of the telescopic cylinder 34 are connected to the two ends of the third solenoid directional valve 35 via hydraulic lines. The oil outlet and oil inlet of the pitch cylinder 39 are connected to the first one-way throttle valve 38 via hydraulic lines. The first one-way throttle valve 38 is connected in parallel with the fourth solenoid directional valve 36 via hydraulic lines. The fourth solenoid directional valve 36 is connected in parallel with the third relief valve 37 via hydraulic lines. The third relief valve 37 controls the pressure of the pitch cylinder 39 during telescopic movement to prevent damage during boom descent. The first one-way throttle valve 38 controls the operating speed of the pitch cylinder 39.The P port of the suction arm hydraulic control unit 3 returns oil to the oil tank 69 via a hydraulic pipeline. The suction arm hydraulic control unit 3 is connected to the suction arm via a hydraulic pipeline. The sludge-water separation hydraulic control unit 2 includes a sludge-water separation motor 21, a fourth overflow valve 22, and a fifth solenoid directional valve 23. The fourth overflow valve 22 and the fifth solenoid directional valve 23 are connected in parallel via hydraulic pipelines. The sludge-water separation motor 21 and the fourth overflow valve 22 are connected in parallel via hydraulic pipelines. The P port of the sludge-water separation hydraulic control unit 2 is connected to a gear pump 63 via a hydraulic pipeline. The T-port of the sludge-water separation hydraulic control unit 2 returns oil to the oil tank 69 through the hydraulic pipeline. The fourth overflow valve 22 controls the pressure of the sludge-water separation motor 21 to ensure that the pressure is within the working pressure range of the sludge-water separation motor 21. The sludge-water separation hydraulic control unit 2 and the rotary arm motor valve group in the suction rotary arm hydraulic control unit 3 are connected in series. A first throttle valve 31 is installed between the return oil pipeline of the suction rotary arm hydraulic control unit 3 and the return oil pipeline of the sludge-water separation hydraulic control unit 2. The first throttle valve 31 ensures that the flow rate is within the working flow rate range of the sludge-water separation motor.The hydraulic control unit 1 for the cylinder and sewage pump includes a sewage pump opening valve group, a sewage pump closing valve group, an unlocking valve group, a tank cover valve group, and a lifting valve group arranged in parallel. The sewage pump opening valve group includes a fifth relief valve 11 and a sixth solenoid directional valve 12, which are connected in series via hydraulic lines. The sewage pump closing valve group includes a sewage pump 114 and a seventh solenoid directional valve 13, which are connected in series via hydraulic lines. The unlocking valve group includes an unlocking cylinder 112, with the left arrow indicating unlocking and the right arrow indicating retraction. The oil outlet and inlet of the unlocking cylinder 112 are connected to the second one-way throttle valve 16 via hydraulic lines. The second one-way throttle valve 16 is connected in series with the eighth solenoid directional valve 14 via hydraulic lines. The can cover valve assembly includes a can cover cylinder 111, with the left side of the arrow indicating opening and the right side indicating closing. The oil inlet and outlet of the can cover cylinder 111 are connected to a one-way valve 19 via hydraulic lines. The one-way valve 19 is connected in series with the second one-way throttle valve 16 via hydraulic lines. The second one-way throttle valve 16 is connected in series with the ninth solenoid directional valve 15 via hydraulic lines. The lifting valve assembly includes a lifting cylinder 110, with the left arrow indicating descent and the right arrow indicating lifting. The oil outlet and inlet of the lifting cylinder 110 are connected to a second one-way throttle valve 16 via hydraulic lines. A one-way valve 19 is installed between the oil inlet of the lifting cylinder 110 and the second one-way throttle valve 16. The second one-way throttle valve 16 and the tenth solenoid directional valve 17 are connected in series via hydraulic lines. The tenth solenoid directional valve 17 is connected in parallel with the sixth relief valve 18 via hydraulic lines. The P port of the hydraulic control unit 1 for the cylinder and the sewage pump is connected to a gear pump 63 via hydraulic lines. The T port of the hydraulic control unit 1 for the cylinder and the sewage pump returns oil to the oil tank 69 via hydraulic lines. The one-way valve 19 prevents the cylinder from slipping off naturally. The oil cooling unit 5 includes a cooler 64, which is connected to the return oil line of the oil tank 69. A return oil filter 67 is installed between the oil tank 69 and the cooler 64. An air filter 66 and a liquid level thermometer 65 are installed in the oil tank 69. The seventh solenoid directional valve 13 in the sewage pump shut-off valve group of the hydraulic control unit 1 for the oil cylinder and sewage pump is connected in series with the second throttle valve 113 via a hydraulic pipeline. The proportional directional speed control valve 43, the second solenoid directional valve 33, the third solenoid directional valve 35, the fourth solenoid directional valve 36, the fifth solenoid directional valve 23, the eighth solenoid directional valve 14, the ninth solenoid directional valve 15, and the tenth solenoid directional valve 17 are three-position four-way directional valves. The first solenoid directional valve 42, the sixth solenoid directional valve 12, and the seventh solenoid directional valve 13 are two-position four-way directional valves.
[0015] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A hydraulic control system for a vehicle-mounted cleaning and vacuuming device, characterized in that: It includes a power supply unit (6), a cleaning reel hydraulic control unit (4), a suction boom hydraulic control unit (3), a mud-water separation hydraulic control unit (2), a cylinder and sewage pump hydraulic control unit (1), and an oil cooling unit (5). The power supply unit includes an oil tank (69), an engine (61), a broken shaft power take-off (62), and three gear pumps (63). The engine (61) is installed above the oil tank. The engine (61) is connected to the broken shaft power take-off (62). The broken shaft power take-off (62) is connected to a gear pump (63). The three gear pumps (63) are connected in series. The cleaning reel hydraulic control unit (4) includes a proportional directional speed control valve (43), a first relief valve (41), a first solenoid directional valve (42), a cycloidal motor (45), a brake (44), and hydraulic lines connecting each part. The first relief valve (41), the first solenoid directional valve (42), and the proportional directional speed control valve (43) are connected in parallel through hydraulic lines. The proportional directional speed control valve (43) is connected to the cycloidal motor (45) through hydraulic lines. The cycloidal motor (45) and the brake (44) are connected in parallel. The P port of the cleaning reel hydraulic control unit (4) is connected to a gear pump (63) through hydraulic lines. The T port of the cleaning reel hydraulic control unit (4) returns oil to the oil tank (69) through hydraulic lines. The hydraulic control unit (3) for the suction boom includes a boom motor valve group and a boom cylinder valve group. The boom motor valve group and the boom cylinder valve group are connected in series through hydraulic lines. The boom motor valve group includes a second relief valve (32) and a second solenoid directional valve (33). The second relief valve (32) and the second solenoid directional valve (33) are connected in parallel through hydraulic lines. The second solenoid directional valve (33) is connected to the boom motor (310) through hydraulic lines. The boom cylinder valve group includes a telescopic cylinder (34) and a pitch cylinder (39). The telescopic cylinder (34) has an oil outlet and an oil inlet. The ports are connected to the two ends of the third electromagnetic directional valve (35) through hydraulic lines respectively. The oil outlet and oil inlet of the pitch cylinder (39) are connected to the first one-way throttle valve (38) through hydraulic lines respectively. The first one-way throttle valve (38) is connected in parallel with the fourth electromagnetic directional valve (36) through hydraulic lines. The fourth electromagnetic directional valve (36) is connected in parallel with the third relief valve (37) through hydraulic lines. The P port of the suction arm hydraulic control unit (3) returns oil to the oil tank (69) through hydraulic lines. The suction arm hydraulic control unit (3) is connected to the suction arm through hydraulic lines. The mud-water separation hydraulic control unit (2) includes a mud-water separation motor (21), a fourth overflow valve (22), and a fifth solenoid directional valve (23). The fourth overflow valve (22) and the fifth solenoid directional valve (23) are connected in parallel through hydraulic pipelines. The mud-water separation motor (21) and the fourth overflow valve (22) are connected in parallel through hydraulic pipelines. The P port of the mud-water separation hydraulic control unit (2) is connected to a gear pump (63) through a hydraulic pipeline. The T port of the mud-water separation hydraulic control unit (2) returns oil to the oil tank (69) through a hydraulic pipeline. The mud-water separation hydraulic control unit (2) is connected in series with the swivel arm motor valve group in the suction swivel arm hydraulic control unit (3). The hydraulic control unit (1) for the cylinder and the sewage pump includes a sewage pump opening valve group, a sewage pump closing valve group, an unlocking valve group, a tank cover valve group, and a lifting valve group arranged in parallel. The sewage pump opening valve group includes a fifth relief valve (11) and a sixth solenoid directional valve (12). The fifth relief valve (11) and the sixth solenoid directional valve (12) are connected in series through hydraulic pipelines. The sewage pump closing valve group includes a sewage pump (114) and a seventh solenoid directional valve (13). The sewage pump (114) and the seventh solenoid directional valve (13) are connected in series through hydraulic pipelines. The unlocking valve group includes an unlocking cylinder (112). The oil outlet and oil inlet of the unlocking cylinder (112) are respectively connected to the second one-way throttle valve (16) through hydraulic lines. The second one-way throttle valve (16) is connected in series with the eighth solenoid directional valve (14) through hydraulic lines. The tank cover valve group includes a tank cover cylinder (111). The oil inlet and oil outlet of the tank cover cylinder (111) are respectively connected to a one-way valve (19) through hydraulic lines. The one-way valve (19) is connected in series with the second one-way throttle valve (16) through hydraulic lines. The second one-way throttle valve (16) is connected in series with the ninth solenoid directional valve (15) through hydraulic lines. The lifting valve assembly includes a lifting cylinder (110). The oil outlet and oil inlet of the lifting cylinder (110) are connected to the second one-way throttle valve (16) through hydraulic lines. A one-way valve (19) is provided between the oil inlet of the lifting cylinder (110) and the second one-way throttle valve (16). The second one-way throttle valve (16) and the tenth solenoid directional valve (17) are connected in series through hydraulic lines. The tenth solenoid directional valve (17) is connected in parallel with the sixth relief valve (18) through hydraulic lines. The P port of the hydraulic control unit (1) of the cylinder and the sewage pump is connected to a gear pump (63) through hydraulic lines. The T port of the hydraulic control unit (1) of the cylinder and the sewage pump returns oil to the oil tank (69) through hydraulic lines. The oil cooling unit (5) includes a cooler (64), which is connected to the oil return line of the oil tank (69).
2. The hydraulic control system of the vehicle-mounted cleaning and vacuuming device according to claim 1, characterized in that: An oil suction filter (68) is provided between the oil tank (69) and the gear pump (63).
3. The hydraulic control system of the vehicle-mounted cleaning and vacuuming device according to claim 1, characterized in that: An oil return filter (67) is provided between the oil tank (69) and the cooler (64).
4. The hydraulic control system of the vehicle-mounted cleaning and vacuuming device according to claim 1, characterized in that: An air filter (66) and a liquid level thermometer (65) are installed in the oil tank (69).
5. The hydraulic control system of the vehicle-mounted cleaning and vacuuming device according to claim 1, characterized in that: A first throttle valve (31) is installed between the return oil line of the suction boom hydraulic control unit (3) and the return oil line of the mud-water separation hydraulic control unit (2).
6. The hydraulic control system of the vehicle-mounted cleaning and vacuuming device according to claim 1, characterized in that: The seventh electromagnetic directional valve (13) in the sewage pump shut-off valve group of the hydraulic control unit (1) of the cylinder and sewage pump is connected in series with the second throttle valve (113) through a hydraulic pipeline.
7. The hydraulic control system of the vehicle-mounted cleaning and vacuuming device according to claim 1, characterized in that: The proportional directional control valve (43), the second electromagnetic directional valve (33), the third electromagnetic directional valve (35), the fourth electromagnetic directional valve (36), the fifth electromagnetic directional valve (23), the eighth electromagnetic directional valve (14), the ninth electromagnetic directional valve (15), and the tenth electromagnetic directional valve (17) are three-position four-way directional valves.
8. The hydraulic control system of the vehicle-mounted cleaning and vacuuming device according to claim 1, characterized in that: The first electromagnetic directional valve (42), the sixth electromagnetic directional valve (12), and the seventh electromagnetic directional valve (13) are two-position four-way directional valves.