INSTALLATION FOR CATHODE PROTECTION OF GAS LINES AND UNDERGROUND CONSTRUCTIONS Russian patent published in 2010 - IPC C23F13/02 

FIELD: machine building.

SUBSTANCE: installation consists of transformer, of rectifier, plus terminal of which is connected to anode earth lead through filter of rectified voltage, of silicon gates in circuit of protected constructions, of sensor of protecting potential of main protected construction, of N sensors of potential difference, and of power keys and filters of main and additional protective constructions. The installation also contains a potential master, a comparator, an amplifier, an integrator and a unit of power key control of the main protected construction, N invertors, N first and second Shmitt triggers, N first and second AND elements, N generators of pulses, N reverse counters, N digit-analogue converters and N units of control of power keys of additional protected constructions. Also power keys and filters of main and additional constructions are connected in series with gates in circuits of the main and additional protected constructions. The potential master is connected to the first input of the comparator unit.

EFFECT: raised efficiency of cathode protection of underground constructions and reduced electric losses during equalisation of protective potentials.

1 dwg