DEVICE TO CONTROL TRAVEL OF PIERCER IN POWER SUPPLY SYSTEM OF ALUMINIUM PRODUCTION ELECTROLYSER Russian patent published in 2010 - IPC C25C3/14 

FIELD: electrical engineering.

SUBSTANCE: proposed device comprises a piercer supported by a rod attached to drive rod. The said drive allows piercer to move between vertical position, whereat it stays under cake, and lower position to penetrate the said cake to contact melt. It comprises also means to detect electrical contact between the piercer and melt that comprise electric circuit that serves to measure the signal between the piercer and electrolyser point taken to make control electrical point, and to immediately act on above mentioned drive to move the piercer up. Preset signal value reached, the said electric circuit is connected to piercer or piercer rod by appropriate connectors to allow point contact in, at least, one point between the circuit and piercer or piercer rod actuated by elastic means pushing the towards the piercer or piercer rod.

EFFECT: accurate determination of time interval piercer contacts melt, ruling out clogging of piercer by electrolyte cake.

13 cl, 4 dwg