Pneumatic hoist is a type of hoist that uses air pressure to start, used for lifting, traction, loading and unloading functions, and is an ideal explosion-proof lifting equipment.

The pneumatic hoist mainly consists of four parts, namely the air distribution system, power system, deceleration system, and winch system. 

The working principle of pneumatic hoist is to compress air to generate power, which is transmitted to the winch system through a transmission mechanism, driving the winch chain to pull heavy objects, achieving functions such as lifting and traction.

Pneumatic hoists have the advantages of accurate positioning, simple operation, safety and reliability, and achieving stepless speed regulation. 

They will be increasingly used in future industry production. However, there are also some drawbacks to using pneumatic hoists, such as high requirements for air supply and the need to use compressed air. If the air supply is interrupted, it will affect the normal use of pneumatic hoists.

Overall, pneumatic hoists are an important lifting equipment with high application value and development prospects, but safety issues also need to be paid attention to during use.