Method and device for insulating the spray liquid source...

Details Method and device for insulating the spray liquid source... Method and device for insulating the spray liquid source...

B - Operations, Transporting

05

D

117/54, 32/17.5

B05D 1/04 (2006.01) B05B 5/16 (2006.01)

Patent

CA 1266400

Abstract A method and a device for insulating the spray liquid source from the high tension voltage of an electrostatic spray gun (13) when using an electrically conductive spray liquid. The spray liquid supply line (12) comprises an insulating device (14) in the form of a closed vessel (16; 26; 36) containing an electrically non-conductive liquid which is not mixable with the spray liquid and which has a density different from that of the latter. A sprinkler nozzle (21; 31; 41) is arranged to disintegrate the spray liquid into drops which are transported through the insulating liquid (17, 27; 35) by the influence of the difference in gravity acting on the two liquids. The spray liquid drops form a discontinuation of the electrical lead through which the high tension voltage propagates upstreams through the supply line (12). Thereby, the upstream parts of the supply line (12) including the spray liquid feed pump (11) and the spray liquid receptacle (10) are not reached by the high tension voltage. A pump (30; 40) and passages (27, 28; 37, 38) are arranged to forcibly circulate the insulating liquid (17; 27) within the vessel (16, 26; 36) such that a movement is superimposed upon the spray liquid transportation movement such that the spray liquid flow capacity through the insulating device is thereby increased. 86009-860311

532075

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