The invention relates to the technical field of hydraulic lifting systems, and provides a hydraulic lifting control system of a container transportation semitrailer, which comprises a main control unit and an electromagnetic directional valve control circuit, the electromagnetic directional valve control circuit comprises an operational amplifier U1, a resistor R25, a switch tube Q2, a resistor R9 and a switch tube Q3, the in-phase input end of the operational amplifier U1 is connected with the main control unit, and the in-phase input end of the operational amplifier U1 is connected with the main control unit; the output end of the operational amplifier U1 is connected with the inverted input end of the operational amplifier U1 through a resistor R25 and connected with the control end of a switching tube Q2, the first end of the switching tube Q2 is connected with a 24V power supply through a resistor R9, the second end of the switching tube Q2 is grounded, the first end of the switching tube Q2 is connected with the control end of a switching tube Q3, the first end of the switching tube Q3 is connected with the 24V power supply, and the second end of the switching tube Q3 is connected with the control end of the switching tube Q3. The second end of the switch tube Q3 is connected with the first end of a coil L1 of the electromagnetic reversing valve, and the second end of the coil L1 of the electromagnetic reversing valve is grounded, and by means of the technical scheme, the problem that in the prior art, the current of an electromagnetic reversing valve control circuit is unstable in the operation process is solved.

    本发明涉及液压举升系统技术领域,提出了一种集装箱运输半挂车的液压举升控制系统,包括主控单元和电磁换向阀控制电路,电磁换向阀控制电路包括运放U1、电阻R25、开关管Q2、电阻R9和开关管Q3,运放U1的同相输入端连接主控单元,运放U1的输出端通过电阻R25连接运放U1的反相输入端,运放U1的输出端连接开关管Q2的控制端,开关管Q2的第一端通过电阻R9连接24V电源,开关管Q2的第二端接地,开关管Q2的第一端连接开关管Q3的控制端,开关管Q3的第一端连接24V电源,开关管Q3的第二端连接电磁换向阀线圈L1的第一端,电磁换向阀线圈L1的第二端接地,通过上述技术方案,解决了现有技术中电磁换向阀控制电路在运行过程中电流不稳定的问题。


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    Title :

    Hydraulic lifting control system of container transportation semitrailer


    Additional title:

    一种集装箱运输半挂车的液压举升控制系统


    Contributors:
    TIAN HAIJUN (author) / WANG XUYANG (author) / HUANG ZIHAO (author)

    Publication date :

    2023-09-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last



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