An emergency descent system for an aerial work platform includes a telescopic hydraulic cylinder provided a piston rod inside, a counterbalance valve, an oil return pipe and a proportional valve. An interior of the telescopic hydraulic cylinder is divided into a cavity with rod and a cavity with non-rod. An inlet of the counterbalance valve is connected to the cavity with non-rod, and an outlet of the counterbalance valve is connected to an oil supply pipe. The oil return pipe is connected to the cavity with rod and a control port of the counterbalance valve, the oil return pipe is connected to an emergency oil source which is used for providing hydraulic oil to the oil return pipe. An inlet of the proportional valve is connected to the cavity with non-rod, and an outlet of the proportional valve is connected to the oil return pipe.
EMERGENCY DESCENT SYSTEM FOR AERIAL WORK PLATFORM AND CONTROL METHOD THEREOF
2025-01-09
Patent
Electronic Resource
English
IPC: | F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |
Aerial work platform emergency descending system and control method
European Patent Office | 2022
|Emergency descending hydraulic control system, control method and aerial work platform
European Patent Office | 2024
|Aerial work platform and aerial work platform control method
European Patent Office | 2024
|Aerial work platform control method, device and system and aerial work platform
European Patent Office | 2023
|