30m Mobile Hydraulic Cylinder Telescoping Boom Crane Lift Crank Arm Lift Platform

Specifications
 telescopic  cylinder lift
 1.lifting  height:6-30m
 2.lifting  weight:120-200kg
 3.double  speed down system
 4.novel  design

Hydraulic double  ladder anti-rotating hydraulic telescopic cylinder lift platform
 (1) Working principle  of lift platform:
 When  the platform rises to the highest position, the system pressure will reach a  rated operating pressure. At this moment, relief valve unloads and oil pressure  remains a constant operating pressure.
 After  the machine stops, as the one-way valve maintains pressure, the platform will  stay at the position of maximum height. The platform can stop at any position  below the maximum height according to onsite operating high to supply oil, and  the oil will flow into cylinder through one-way valve and electromagnetic channel,  as a result, the telescopic cylinder rises joint by joint. When the platform  rises to the highest position, the system pressure will reach a rated operating  pressure. At this moment, relief valve unloads and oil pressure remains a  constant operating pressure.
 After  the machine stops, as the one-way valve maintains pressure, the platform will  stay at the position of maximum height. The platform can stop at any position  below the maximum height according to onsite operating height. As the platform  goes down, its dead weight presses the oil into oil tank through magnetic exchange  valve. When connecting magnetic exchange valve, the telescopic cylinder will goes  down joint by joint, or the magnetic exchange valve can be disconnected at any position  in the descending process, then the platform will stop going down.

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