PNEUMATIC DRIVE OF WORKING MEMBER OF DEVICE FOR PUNCHING ELECTROLYTE CRUST IN ALUMINIUM ELECTROLYSER Russian patent published in 2017 - IPC C25C3/14 

FIELD: metallurgy.

SUBSTANCE: pneumatic drive comprises a pneumatic cylinder with spring-loaded return consisting of a sleeve, a front cover, a rear cover with elastic damper mounted on its inner end surface and hole for air supply, a piston with annular projection, a rod which is pivotally fixed in the annular projection, and hollow false rod fixed on the piston annular projection, a three-line two-position control valve with pneumatic or electric control with air source under pressure and a first pneumatic line connected thereto, and which connects the control valve to the opening in the rear cover, an adjustable throttle and a muffler connected to the airline of the air discharge. An annular channel is formed between the outer surface of the false rod and the inner cylindrical surface of the front cover for discharging air from the rod cavity to the environment and blowing off the surface of the false rod to remove dust and cooling during operation of the pneumatic drive.

EFFECT: improved operating characteristics of the pneumatic drive system by reduced abrasive wear of the false rod surface, piston and internal surface of the cylinder.

6 cl, 5 dwg