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In the application of dust removal and environmental protection industry, lifting the cylinder is an important component of the bag filter cleaning system. During the operation of the dust collector, as the dust accumulates on the filter bag, the resistance of the filter bag will gradually increase, affecting the dust removal effect. At this point, the lifting cylinder begins to work, causing the filter bag to vibrate through the reciprocating motion of the piston, shaking off the dust on the surface of the filter bag, and achieving automatic dust removal. Our company adopts standard cylinders and installs polytetrafluoroethylene support rings on the piston to maintain uniform sealing performance during piston movement, achieving the effect of reducing wear and extending service life. The buffer device adopts a new foreign structure, which can act as a one-way valve, making the cylinder structure more compact and reasonable.