The invention discloses a lifting limit device of a marine pneumatic hoist hook, which comprises a winch, a pneumatic motor, a three position four-way hand-directional valve, a two position two-way pneumatic operated directional valve, a two position three-way pneumatic operated directional valve and a two position three-way pneumatic operated directional valve control mechanism, wherein the two output ends of a three position four-way pneumatic reversing valve are respectively connected with the two ends of the pneumatic motor; the output end of an air source is connected with the input end of the three position four-way pneumatic reversing valve through the two position two-way pneumatic operated directional valve; the output end of the air source is also connected with the input end of the two position three-way pneumatic operated directional valve; the output end of the two position three-way pneumatic operated directional valve is connected with the pneumatic control end of the two position two-way pneumatic operated directional valve, and the two position three-way pneumatic operated directional valve control mechanism is arranged on the upper side of a hook. The invention has the advantages of simple structure and low manufacturing cost, and the two position three-way pneumatic operated directional valve control mechanism consisting of a transmission steel wire rope and a hoisting block is adopted for limiting the hoist hook lifting, so the limiting problem when the marine pneumatic hoist hook is used for lifting under an explosion-proof environment is solved, and the lifting limit device can be applied to a movable type pneumatic hoist.
Lifting limit device of marine pneumatic hoist hook
2015-08-19
Patent
Electronic Resource
English
IPC: | B66C Krane , CRANES |
HOIST HOOK AND METHOD OF TRANSPORTING ARTICLE USING HOIST HOOK
European Patent Office | 2024
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