The hydraulic oil forms a certain pressure by the vane pump, and enters the lower end of the hydraulic cylinder through the oil filter, flameproof electromagnetic reversing valve, throttle valve, hydraulic control check valve, and balance valve, so that the piston of the hydraulic cylinder moves upwards and lifts the heavy object, and the oil return at the upper end of the hydraulic cylinder returns to O tanque de óleo através da válvula de reversão eletromagnética à prova de explosão, e a pressão nominal é ajustada através da válvula de alívio, e o valor de leitura do medidor de pressão é observado através do medidor de pressão .
The piston of the cylinder moves downward (i.e., the weight is lowered). The hydraulic oil enters the upper end of the hydraulic cylinder through the explosion-proof electromagnetic reversing valve, and the oil return at the lower end of the hydraulic cylinder returns to the oil tank through the balance valve, the hydraulic check valve, the throttle valve, and the explosion-proof electromagnetic reversing valve. In order to make the heavy object descend smoothly and brake safely and reliably, a balance valve is set on the oil return road to balance the circuit and maintain the pressure, so that the descending speed is not changed by the heavy object, and the flow is adjusted by the throttle valve to control the lifting speed. In order to make the braking safe and reliable and prevent accidents, a hydraulic check valve, that is, a hydraulic lock, is added to ensure that the hydraulic pipeline can be safely self-locked when it bursts accidentally. An overload sound activated alarm is installed to distinguish between overload and equipment failure.
O sistema de controle elétrico controla a rotação do motor através do botão à prova de explosão SB 1- sb6, e a reversão da válvula de reversão eletromagnética à prova de chama para manter o levantamento de carga ou cair e ajustar o atraso de tempo através do programa "logotipo" para evitar freqüentes do motor e afetar a vida útil {3) {3) o "logotipo" para evitar a inicialização frequente do motor e afetar a vida útil {3)