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The hydraulic oil enters the upper end of the hydraulic cylinder through the explosion-proof electromagnetic reversing valve. The return oil at the lower end of the hydraulic cylinder is returned to the tank by the balance valve, the hydraulic-controlled check valve, the throttle valve, and the explosion-proof electromagnetic reversing valve. In order to make the weight drop smoothly, the brake is safe and reliable. A balancing valve is set on the return oil road to balance the circuit and maintain the pressure so that the falling speed will not change due to heavy objects. The flow is adjusted by the throttle valve to control the lifting speed.
In order to make the lifting platform safe and reliable, and prevent accidents, increase the hydraulic control one-way valve, that is, the hydraulic lock, to ensure safe self-locking when the hydraulic pipeline accidentally burst. An overloaded voice-activated alarm was installed to distinguish between overload or equipment failure. The electrical control system controls the rotation of the motor through the explosion-proof buttons SB1-SB6, the direction of reversal of the flameproof electromagnetic reversing valve to keep the load from increasing or decreasing, and adjusting the time delay through the “LOGO†program to avoid the frequent start of the elevator. Service life.
Maintenance of the hydraulic lifting platform Monthly maintenance of the lifting platform Check the hydraulic lifting platform rollers, intermediate shafts and bearings, cylinder pin and bearing, boom hinges and bearings for wear. All parts are filled with some lubricating oil to extend the service life of the lifting platform bearings. Hydraulic oil oil and oil level. The lifting platform is raised all the way. In this position, the hydraulic ground should be 40 to 50 mm higher than the bottom of the tank. If it is found that the hydraulic oil is dark, sticky or has foreign matter such as grit, it should be replaced (32# hydraulic oil). Lifting platform year-end maintenance Check all hydraulic lines and fittings. Pipes must not be damaged, connectors must not be loose, and all connectors must be tightened. Remove and disassemble the lowering valve of the lifting platform, blow the plunger with compressed air, then load it and put it back on. Discard the hydraulic fluid, tighten the joint and take out the oil filter. After cleaning, clean it with compressed air, put it back in the tank, and connect the piping. (Change with new oil and do not continue to use old oil. Otherwise, the moving parts in the hydraulic lifting platform system will accelerate wear.)
Hydraulic lifting platform working principle and use of maintenance Lifting platform working principle Hydraulic oil formed by the vane pump a certain pressure, the oil filter, flameproof electromagnetic valve, throttle valve, hydraulic check valve, balance valve into the liquid cylinder At the lower end, the piston of the hydraulic cylinder moves upwards to lift the heavy object. The upper end of the hydraulic cylinder returns oil to the fuel tank through the explosion-proof electromagnetic directional valve. The rated pressure is adjusted through the overflow valve, and the pressure meter reads the pressure reading through the pressure gauge. The piston of the cylinder moves downwards (both weight drops).