With the widespread use of fixed scissor lift trucks, the related technologies of various aerial work platform vehicles are also constantly updated. Now most of the aerial work platform vehicles rely on power as the power to drive their work, but Sometimes, when the terminal or other conditions of the power supply cause the aerial work platform car to be unable to be used normally, how can the personnel and equipment working at high altitude return to the ground safely? Now we will discuss this issue, mainly as follows:
When the hydraulic system is stopped due to power interruption or other conditions, people and equipment working at high altitude can safely return to the ground. We have an emergency decentralized system in the hydraulic system. It is mainly composed of a high-pressure shut-off valve, which is normally in the off state to keep the system running normally.
When a fault occurs, it can be regarded as unreasonable. In the event of a hydraulic system shutdown failure, the shut-off valve is first opened by manual operation. At this time, the load generated by the weight of the boom and the table is used to drive the rodless cavity of the variable amplitude cylinder to generate oil pressure. Since the aerial work platform vehicle stop valve has been turned on, the hydraulic pressure directly drives the piston of the telescopic cylinder to force the telescopic cylinder to retract to retract the boom. In the retraction, the opening and closing valve is used to control the retracting speed of the boom.
Then, after the aerial work platform arm frame is fully retracted, the number stop valve is closed, and the variable range cylinder is separately retracted by opening and closing the $ number stop valve, so that the boom hem is completely lowered to a safe position until the aerial work platform car. At this time, the shut-off valve is completely closed, and the system is restored to the original state. When the system is repaired or the power is restored, the hydraulic system is restarted, and the aerial work platform can work normally.
Source Veedon aerial work platform, aerial work platform , lift http://
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