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Construction machinery equipment has applied the advantages of hydraulic technology, such as high transmission power, small size, simple structure, easy overload protection and remote remote control, and adopts computer electro-hydraulic control technology, which makes the technical level and operation efficiency of construction machinery as well as safety and reliability. The comfort and adaptability are greatly improved.

    Picture shows the principle diagram of the electro-hydraulic proportional control hydraulic system of the repair car. The system is supplied with oil by a vane-type quantitative pump 5 (driven by the power take-off of the gearbox from the motor of the car). The system has 15 hydraulic actuators with 13 action functions: the driving and steering motors 13 and 14, the roller lift cylinder 15, the silo door cylinder 16, the paw cylinder 17, 18, and the waste bin cylinder 19 (two ), screw conveyor motors 20, 21, heating plate tilt (two), lateral movement, lifting, rotating cylinders 22, 23, 24, 25. These actuators are merged into two groups and each controlled by a group of multiple directional valves, that is, the actuators 13-18 are controlled by the multiple directional valve 8 on the left, and the actuators 19-25 are controlled by the multiple directional valve on the right. Valve 9 control. The two sets of multi-way directional valves are three-position six-port electro-hydraulic proportional directional valves with g adjustment function and use parallel oil circuits (the oil inlet of each directional valve is connected to the general pressure oil circuit, and each oil return port is connected to the general pressure oil circuit. The total oil return port is connected), while realizing direction control, it can realize the speed regulation of each actuator and the simultaneous action of several actuators, and the overflow valve set in valve 8 is used to set the working pressure of the system , To achieve safety protection; the hydraulic pump can be unloaded through the neutral oil circuit of each reversing valve; the four hydraulic motors can be supplemented through the mid position of the Y-type function of the reversing valve to prevent the motor from being sucked when braking . The oil circuit of the walking drive motor 13 is provided with an overflow valve group 10, which is used for the two-way braking and buffering of the motor; the vertical roller lift cylinder 15 and the heating plate tilt hydraulic cylinder 22 use the one-way sequence valves 11 and 12 as the balance valve Used to lock the position of the cylinder and lower the speed limit. The system is equipped with a return oil cooler and a return oil filter for heat dissipation and filtration of the system liquid.


    The working principle of the system-driven repair vehicle operation is as follows:

    During operation, first park the whole vehicle near the pothole to be repaired. The staff will operate the button and place the vertical heating plate in a horizontal position through the action of the heating plate tilt cylinder 22; by remote control (walking drive hydraulic motor) 13. Steering motor 14 and pneumatic control) Drive and operate the traverse cylinder 23, the rotating cylinder 25, and the lifting cylinder 24 of the heating plate, so that the heating plate is aligned with the pothole to be filled and heated. When the heating is softened, the vehicle is moved forward, and the claw cylinders 17, 18 are controlled at the same time to harrow the heated asphalt potholes, and the potholes will be properly repaired by the staff. Controlled by the operating panel, the screw conveyor transports the appropriate amount of asphalt material in the silo to the place to be repaired. After manual finishing, the appropriate amount of emulsified asphalt is sprayed again. Control the lifting hydraulic cylinder 15 and lower the road roller to compact and level the repaired road surface. Finally, the control cylinder 19 loads the excess waste into the waste bin. When feeding, the silo door driven by the control cylinder 16 is opened to realize the feeding. After the feeding, the cylinder 16 drives the silo door to close.

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