The invention relates to an overload protecting device for a pneumatic elevator and the pneumatic elevator. The overload protecting device comprises a weighing plate, a deflating plate, a bolt, a nut and a spring. One end of the bolt is fixedly connected with the weighing plate, and sequentially penetrates through the deflating plate and the spring. The other end of the bolt is screwed with the nut in a matched mode. Multiple air leaking holes are formed in the deflating plate. According to the overload protecting device for the pneumatic elevator and the pneumatic elevator, the principle that air pressure difference exists between an enclosed space inside the hatchway and the external atmospheric pressure is utilized, by using the combined effect of the air pressure difference and elasticity of the spring, opening and closing of the overload protecting device are achieved, when the overload protecting device is opened, the enclosed space is communicated with the external atmospheric pressure, and a lift car is prevented from moving under the air pressure difference effect, so that a lifting system of the elevator loses the capability to lift the lift car, and the safety and the reliability are higher.
Overload protecting device for pneumatic elevator and pneumatic elevator
2015-06-24
Patent
Elektronische Ressource
Englisch
IPC: | B66B Aufzüge , ELEVATORS |
Overload valve assembly for a pneumatic vacuum elevator
Europäisches Patentamt | 2023
|OVERLOAD VALVE ASSEMBLY FOR A PNEUMATIC VACUUM ELEVATOR
Europäisches Patentamt | 2021
|