PROTECTIVE GAS FLOW RATE CONTROLLER FOR WELDING SET Russian patent published in 2012 - IPC B23K9/95 B23K9/16 G05D7/06 

FIELD: process engineering.

SUBSTANCE: controller 100 is designed to be mounted in gas feed line between gas source and arc welding set gas valve 800. Controller 100 has protective gas inlet 200 and outlet 600, controlled gas valve 110 connected in between gas inlet and outlet and provided with control input 170, and control means. Control means has first input to receive welding signal and gas flow rate adjustment parameter control means 300. Input pressure transducer 120 is connected to gas inlet to output inlet gas pressure 150 to second input of control input. Output pressure transducer 140 is connected to gas outlet to output outlet gas pressure 160 to third input of control input. Converter of gas flow rate adjustment parameter control output signal convert said signal proceeding from the results of input and output gas pressures, welding signal and controlled valve characteristics into control signal 170 to be fed to controlled gas valve control input to maintain constant has flow in feed line that corresponds to flow rate adjustment parameters output signal irrespective of actual input and output gas pressure ate welding set inlet and outlet.

EFFECT: higher efficiency of control.

8 cl, 10 dwg