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What are the working principles of several commonly used valves for lifting platforms?

by:Powerston     2021-06-28
platforms are generally divided into hydraulic lifting platforms such as mobile lifting platforms, fixed lifting platforms, rail-type freight elevators, aluminum alloy lifting platforms, and hydraulic docking bridges according to different moving methods, structural methods, and raw materials. Although the classification of the lifting platform is different, the working principle is the same. Here is a small editor from the machinery manufacturing company to explain it to you. The working principle of the lifting platform is that the hydraulic oil forms a certain pressure by the vane pump, and enters the lower end of the hydraulic cylinder through the oil filter, explosion-proof electromagnetic directional valve, throttle valve, hydraulic control check valve, and balance valve. The piston moves upwards, the lifting platform lifts up and lifts the weight, the upper end of the hydraulic cylinder returns to the oil tank through the flameproof electromagnetic reversing valve, and its rated pressure is adjusted through the overflow valve, and the pressure gauge reading value is observed through the pressure gauge. When the electric lifting platform descends due to gravity, the piston of the hydraulic cylinder moves downwards, the hydraulic oil enters the upper end of the hydraulic cylinder through the explosion-proof electromagnetic reversing valve, and the oil return from the lower end of the hydraulic cylinder passes through the balance valve, hydraulic control check valve, and joint. The flow valve and the explosion-proof electromagnetic directional valve return to the fuel tank. In order to make the heavy objects drop smoothly and the lifting platform braking is safe and reliable, a balance valve is installed on the oil return path to balance the circuit and maintain the pressure so that the descending speed is not changed by the weight. The flow rate is adjusted by the throttle valve to control the lifting cage of the hydraulic lifting platform. speed. In order to make the brake safe and reliable, and prevent accidents, a hydraulically controlled one-way valve, that is, hydraulic lock, is added to ensure that it can be safely self-locked when the hydraulic pipeline bursts accidentally. An overload sound-activated alarm is installed to distinguish overload or equipment failure. The electronic control system can control the rotation of the motor through the explosion-proof button to change the direction of the flameproof electromagnetic reversing valve to keep the load rising or falling. It can also adjust the time delay to avoid the inflexible lifting cage caused by the frequent starting of the motor. , Jam phenomenon, prolong the service life of the pumping station of the lifting platform. By explaining the working principle of the lifting platform, everyone will understand that the use of the lifting cage platform is very safe. If the spill valve is installed, the pressure will not be too high to ensure the smooth lifting of the lifting platform. The hydraulic control check valve is installed to prevent the lifting platform from falling rapidly due to the burst of the hydraulic tubing.
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