A hydraulic system for a sweeper truck

Abstract

The utility model discloses a kind of washing and sweeping vehicle hydraulic systems, it is related to washing and sweeping vehicle technical field, including oil tank and main valve group, inlet P and oil outlet T are equipped on the main valve group, the oil tank is communicated with inlet P by oil inlet path, the oil tank is communicated with oil outlet T by oil return path, the main valve group is equipped with oil port A1, B1, A2, B2 and A3, left sweeping oil path is equipped between the oil port A1, B1, left sweeping disc motor is equipped on the left sweeping oil path, the oil port A2, B2 is equipped with broken oil path, reamer motor is equipped on the broken oil path, the oil port A3 is communicated with oil return path by right sweeping oil path, right sweeping motor is equipped on the right sweeping oil path, oil pump and motor are equipped on the oil inlet path. Hydraulic system structure is simple, left sweeping motor, reamer motor and right sweeping motor are realized action control by an oil tank, and practicality is higher.

Description

Technical Field

[0001] This utility model relates to the field of sweeper truck technology, and in particular to a hydraulic system for sweeper trucks. Background Technology

[0002] In late autumn, the garbage conveying pipes of sweeper trucks are frequently blocked by leaves during operation, severely affecting the efficiency of the work. Therefore, it is necessary to select whether to activate the sweeping and crushing function based on different road conditions, seasons, and types of garbage. Currently, the sweeping and crushing function requires a separate hydraulic system, including a gear pump, a valve assembly, and a set of pipelines.

[0003] For example, CN114233702A, published on March 25, 2022, discloses a hydraulic system for a sweeper truck, including: an integrated hydraulic oil tank; an oil pump; at least one sweeping disc motor for driving the sweeping brushes; a valve group for regulating the pressure and speed of the sweeping disc motor during operation; and a pressure sensor for monitoring the working pressure of the hydraulic system. The integrated hydraulic oil tank, oil pump, valve group, sweeping disc motor, and pressure sensor are connected via oil circuits. Existing hydraulic systems cannot control the operation of the reamer, resulting in poor practicality. Summary of the Invention

[0004] The purpose of this invention is to provide a more practical hydraulic system for sweeper trucks. This invention uses a single oil tank and main valve assembly to control the movement of the left sweeping motor, cutter motor, and right sweeping motor. The hydraulic system has a simple structure and is more practical.

[0005] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is as follows: a hydraulic system for a sweeper truck, including an oil tank and a main valve assembly. The main valve assembly is provided with an oil inlet P and an oil outlet T. The oil tank is connected to the oil inlet P through an oil inlet circuit and to the oil outlet T through a return oil circuit. The main valve assembly is provided with oil ports A1, B1, A2, B2, and A3. A left sweeping oil circuit is provided between oil ports A1 and B1, and a left sweeping disc motor is provided on the left sweeping oil circuit. A shredding oil circuit is provided between oil ports A2 and B2, and a reamer motor is provided on the shredding oil circuit. Oil port A3 is connected to the return oil circuit through a right sweeping oil circuit, and a right sweeping motor is provided on the right sweeping oil circuit. An oil pump and a motor are provided on the oil inlet circuit.

[0006] The main valve assembly includes a main oil circuit and an oil outlet circuit. The main oil circuit is connected to the oil inlet P, and the oil outlet circuit is connected to the oil outlet T. The main oil circuit is connected to the oil outlet circuit through an overflow valve and an unloading solenoid valve. The main oil circuit and the oil outlet circuit are connected to oil ports A1 and B1 through a three-position four-way solenoid valve and a stacked check valve. A two-position four-way solenoid valve is also connected to the oil outlet circuit. The two-position four-way solenoid valve is connected to oil ports B2 and A3.

[0007] A control oil circuit is also provided between the main oil circuit and the outlet oil circuit, and the control oil circuit is equipped with a speed regulating solenoid valve and a one-way throttle valve.

[0008] The oil inlet line is also equipped with a manual oil suction ball valve, which is located between the oil tank and the oil pump.

[0009] An oil return filter is installed on the oil return line.

[0010] A tubular check valve is provided on the left sweeping oil line, and the tubular check valve is located on the side near the oil port B1.

[0011] The crushing oil line is equipped with a bypass oil line, and the bypass oil line is equipped with a bypass manual ball valve.

[0012] The beneficial effects of this utility model are:

[0013] The oil pump is driven by an electric motor, which causes the oil in the tank to enter the main valve group through the oil inlet. The main valve group controls the left sweeping motor, the shovel motor, and the right sweeping motor, thereby realizing the left sweeping, crushing, and right sweeping functions of the sweeper. The entire hydraulic system has a simple structure, and the left sweeping motor, the shovel motor, and the right sweeping motor are controlled by a single oil tank and the main valve group, making it more practical. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the hydraulic system of the sweeper truck of this utility model.

[0015] In the attached diagram: 1-oil tank, 2-manual suction ball valve, 3-motor, 4-oil pump, 5-main valve group, 501-relief valve, 502-unloading solenoid valve, 503-speed regulating solenoid valve, 504-one-way throttle valve, 505-three-position four-way solenoid valve, 506-stacked one-way valve, 507-two-position four-way solenoid valve, 6-left sweeping disc motor, 7-pipe-type one-way valve, 8-bypass manual ball valve, 9-reamer motor, 10-right sweeping disc motor, 11-return oil filter, 12-oil inlet circuit, 13-oil return circuit, 14-left sweeping oil circuit, 15-crushing oil circuit, 16-right sweeping oil circuit, 17-main oil circuit, 18-oil outlet circuit, 19-control oil circuit, 20-bypass oil circuit. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0018] like Figure 1 As shown, the hydraulic system of the sweeper truck includes an oil tank 1 and a main valve assembly 5. The main valve assembly 5 has an oil inlet P and an oil outlet T. The oil tank 1 is connected to the oil inlet P through an oil inlet passage 12, and the oil tank 1 is connected to the oil outlet T through a return oil passage 13. The main valve assembly 5 has oil ports A1, B1, A2, B2, and A3. A left sweeping oil passage 14 is provided between oil ports A1 and B1, and a left sweeping disc motor 6 is provided on the left sweeping oil passage 14. A crushing oil passage 15 is provided between oil ports A2 and B2, and a crushing oil passage 15 is provided with... The reamer motor 9 and oil port A3 are connected to the return oil line 13 through the right sweeping oil line 16. The right sweeping oil line 16 is equipped with the right sweeping motor 10, and the oil inlet line 12 is equipped with the oil pump 4 and the motor 3. The left sweeping disc motor 6 works to realize the left sweeping of the sweeper, the right sweeping disc motor 10 works to realize the right sweeping of the sweeper, and the reamer motor 9 works to realize the crushing function of the sweeper. Specifically, the specific model of the motor 3 is WR510-01158, and the specific model of the oil pump 4 is CBW-F310-AFP.

[0019] During operation, the motor 3 activates the oil pump 4, causing the oil in the tank 1 to enter the main valve assembly 5 through the inlet oil passage 12. The oil in the main valve assembly 5 then flows through the left sweeping oil passage 14, activating the left sweeping disc motor 6 on the left sweeping oil passage 14 to achieve the left sweeping function of the sweeper. The oil in the main valve assembly 5 also flows through the breaker oil passage 15, activating the reamer motor 9 on the breaker oil passage 15 to achieve the breaker function of the sweeper. The oil in the main valve assembly 5 further flows through the right sweeping oil passage 16, activating the right sweeping disc motor 10 on the right sweeping oil passage 16 to achieve the right sweeping function of the sweeper. The oil from the main valve assembly 5 flows into the return oil passage 13, and the oil in the return oil passage 13 flows back to the tank 1, thus enabling the sweeper to operate normally. The entire hydraulic system has a simple structure, using a single tank 1 to drive and control the left sweeping motor 6, the reamer motor 9, and the right sweeping motor 10, making it more practical.

[0020] The main valve assembly 5 includes a main oil passage 17 and an oil outlet passage 18. The main oil passage 17 is connected to the oil inlet P, and the oil outlet passage 18 is connected to the oil outlet T. The main oil passage 17 is connected to the oil outlet passage 18 through an overflow valve 501 and an unloading solenoid valve 502. The main oil passage 17 and the oil outlet passage 18 are connected to oil ports A1 and B1 through a three-position four-way solenoid valve 505 and a stacked check valve 506. Oil port B1 and the stacked check valve 506 are connected through a connecting oil passage 20. A two-position four-way solenoid valve 507 is also connected to the oil outlet passage 18. The two-position four-way solenoid valve 507 is connected to oil ports B2 and A3.

[0021] A control oil circuit 19 is also provided between the main oil circuit 17 and the outlet oil circuit 18. The control oil circuit 19 is equipped with a speed regulating solenoid valve 503 and a one-way throttle valve 504. By setting the speed regulating solenoid valve 503 and the one-way throttle valve 504, the flow rate of the control oil circuit 19 in the main valve group 5 into the outlet oil circuit 18 and the flow rate of the A1 oil port are adjusted, thereby achieving the control of the speed of the left sweeping disc motor 6, the reamer motor 9 and the right sweeping disc motor 10.

[0022] The oil inlet circuit 12 is also equipped with a manual suction ball valve 2, which is located between the oil tank 1 and the oil pump 4. The manual suction ball valve 2 controls the opening and closing of the oil inlet circuit 12. Specifically, the model of the manual suction ball valve 2 is NKHS-G1.

[0023] The return oil line 13 is equipped with a return oil filter 11, which filters the oil flowing back to the oil tank 1 to prevent impurities in the oil from entering the oil tank 1, thereby ensuring that the oil in the oil tank 1 can be recycled. Specifically, the return oil filter 11 is model RFA-160×10L.

[0024] A tubular check valve 7 is installed on the left sweeping oil passage 14. The tubular check valve 7 is located on the side near the oil port B1. The tubular check valve 7 ensures that the oil in the left sweeping oil passage 14 can only flow from the oil port A1 to the oil port B1, preventing backflow. Specifically, the tubular check valve 7 is model S10A10.

[0025] A bypass oil passage 20 is provided on the crushing oil passage 15, and a bypass manual ball valve 8 is provided on the bypass oil passage 20. The operation of the reamer motor 9 is controlled by opening and closing the bypass manual ball valve 8. Specifically, the two ends of the bypass oil passage 20 are located on the side of the crushing oil passage 15 near the oil ports A2 and B2. The specific model of the bypass manual ball valve 8 is BKH-G3 / 8.

[0026] In summary, when using the hydraulic system of a sweeper truck:

[0027] Oil pump dry cycle start: The manual ball valve 2 for oil suction is opened, the coil DT1 of the unloading solenoid valve 502 is de-energized, the motor 3 is started, the oil pump 4 is started, the oil pump 4 draws oil from the oil tank 1, and the oil pump 4 pressurizes oil to the P port of the main valve group 5, the right position of the unloading solenoid valve 502, the T port of the main valve group 5, the return oil filter 11, and the oil tank 1 respectively, completing the standby state for oil pump dry cycle start.

[0028] Left sweeping and crushing functions activated: Oil pump starts in dry circulation, bypass manual ball valve 8 is closed, unloading solenoid valve 502 coil DT1 is energized, three-position four-way solenoid valve 505 coil DT5 is energized, oil pump 4 pressurizes oil and connects it to the P port of main valve group 5, the right position of three-position four-way solenoid valve 505, stacked check valve 506, left sweeping disc motor 6, pipe check valve 7, auger motor 9, the right position of two-position four-way solenoid valve 507, the T port of main valve group 5, return oil filter 11, and oil tank 1, completing the simultaneous operation of left sweeping disc and auger.

[0029] Right sweep and crushing function activated: Oil pump starts dry circulation, bypass manual ball valve 8 is closed, unloading solenoid valve 502 coil DT1 is energized, three-position four-way solenoid valve 505 coil DT4 is energized, two-position four-way solenoid valve 507 coil DT6 is energized, oil pump 4 pressurizes oil and connects it to the P port of main valve group 5, the left position of three-position four-way solenoid valve 505, the stacked check valve 506, the auger motor 9, the left position of two-position four-way solenoid valve 507, the right sweeping disc motor 10, the return oil filter 11, and the oil tank 1, completing the simultaneous operation of the right sweeping disc and the auger.

[0030] Full sweeping and crushing functions activated: Oil pump starts in dry circulation, bypass manual ball valve 8 is closed, unloading solenoid valve 502 coil DT1 is energized, three-position four-way solenoid valve 505 coil DT5 is energized, two-position four-way solenoid valve 507 coil DT6 is energized, oil pump 4 pressurizes oil and connects it to the P port of main valve group 5, the right position of three-position four-way solenoid valve 505, stacked check valve 506, left sweeping disc motor 6, pipe check valve 7, auger motor 9, left position of two-position four-way solenoid valve 507, right sweeping disc motor 10, return oil filter 11, and oil tank 1, completing the simultaneous operation of left sweeping disc, right sweeping disc, and auger.

[0031] Crushing function off: In the above three working modes, if it is necessary to turn off the crushing function, simply open the bypass manual ball valve 8. The oil pump 4 will pressurize oil without passing through the cutter motor 9, the cutter motor 9 will stop working, and the crushing function will be turned off.

[0032] Speed ​​adjustment: In the above three working modes, if it is necessary to adjust the speed of the sweeping disc and the auger, the three speeds can be obtained by controlling the energization and de-energization of the speed regulating solenoid valve 503 coil, namely, energizing coil DT2, energizing coil DT3, and de-energizing both DT2 and DT3.

[0033] Safety protection: In the above three working modes, when any sweeping disc or auger is overloaded and the system pressure exceeds the opening pressure of the relief valve 501, the oil pump 4 pressurizes oil and connects it to the P port of the main valve group 5, the relief valve 501, the T port of the main valve group 5, the return oil filter 11, and the oil tank 1 respectively to complete the safety protection function and prevent the hydraulic components from being damaged by excessive pressure and causing personal injury.

[0034] 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, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic system for a sweeper truck, characterized in that, The system includes an oil tank (1) and a main valve assembly (5). The main valve assembly (5) is provided with an oil inlet P and an oil outlet T. The oil tank (1) is connected to the oil inlet P through an oil inlet passage (12). The oil tank (1) is connected to the oil outlet T through a return oil passage (13). The main valve assembly (5) is provided with oil ports A1, B1, A2, B2 and A3. A left sweeping oil passage (14) is provided between oil ports A1 and B1. A left sweeping disc motor (6) is provided on the left sweeping oil passage (14). A crushing oil passage (15) is provided between oil ports A2 and B2. A reamer motor (9) is provided on the crushing oil passage (15). Oil port A3 is connected to the return oil passage (13) through a right sweeping oil passage (16). A right sweeping motor (10) is provided on the right sweeping oil passage (16). An oil pump (4) and a motor (3) are provided on the oil inlet passage (12).

2. The hydraulic system for a sweeper truck according to claim 1, characterized in that, The main valve assembly (5) includes a main oil passage (17) and an oil outlet passage (18). The main oil passage (17) is connected to the oil inlet P, and the oil outlet passage (18) is connected to the oil outlet T. The main oil passage (17) is connected to the oil outlet passage (18) through an overflow valve (501) and an unloading solenoid valve (502). The main oil passage (17) and the oil outlet passage (18) are connected to oil ports A1 and B1 through a three-position four-way solenoid valve (505) and a stacked check valve (506). A two-position four-way solenoid valve (507) is also connected to the oil outlet passage (18). The two-position four-way solenoid valve (507) is connected to oil ports B2 and A3.

3. The hydraulic system for a sweeper truck according to claim 2, characterized in that, A control oil circuit (19) is provided between the main oil circuit (17) and the oil outlet circuit (18), and the control oil circuit (19) is provided with a speed regulating solenoid valve (503) and a one-way throttle valve (504).

4. A hydraulic system for a sweeper truck according to any one of claims 1-3, characterized in that, The oil inlet (12) is also equipped with a manual oil suction ball valve (2), which is located between the oil tank (1) and the oil pump (4).

5. The hydraulic system for a sweeper truck according to claim 4, characterized in that, The return oil path (13) is equipped with a return oil filter (11).

6. The hydraulic system for a sweeper truck according to claim 5, characterized in that, The left sweeping oil passage (14) is equipped with a tubular check valve (7), which is located on the side near the oil port B1.

7. A hydraulic system for a sweeper truck according to claim 6, characterized in that, The crushing oil circuit (15) is provided with a bypass oil circuit (20), and the bypass oil circuit (20) is provided with a bypass manual ball valve (8).

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