Pneumatic winch infinitely variable speed safety operation control gas circuit

Abstract

The pneumatic winch stepless speed regulation safety operation control air circuit includes an air supply air circuit, an emergency stop module, an operation and power device, a main control box, a limit control air circuit, an emergency release air circuit, and an external control stop air circuit. The setting of the second pneumatic control valve in this invention simplifies the connection air circuit and uses the pressure difference between the two air passages of the pneumatic motor to control the reversal of the second pneumatic control valve, making the control more precise and the action more sensitive. Its main air is taken from the air circuit node with high pressure and relatively stable air pressure, which can ensure that when the limit is triggered, it can smoothly push the third pneumatic control valve, which is in the working state and has back pressure, to reverse, so as to realize the limit protection function.

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