| 摘要 |
The invention relates to a high-voltage powder spray gun, in particular f or spraying metallic powders. The rear terminal segment (60) of a powder tube (38) and the front terminal segment (58) of a hookup tube (56) are inserted far enough in axial and sealing manner to subtend between their overlap ends (69,78) a powder-tight, electrically insulating expanse (76) to preclude electrical leakage currents. An electrically conducting bus h (42) runs over the outer overlap end (78) of the hookup-tube/powder-tube connection to shunt an y electric charges that might issue at the outer overlap end (78) between the hookup tube (56) and the powder tube (38). This powder spray gun preferably also is fitted with an electrically grounded shielding sheath (90), preferably a helical compression spring, which is configured radially away above the outer overlap end (88), said sheath being configured between the rear termin al segment of the hookup tube (56) and the front end of powder hose (84) slipped over said rea r terminal segment. This configuration prevents arcing on the hand of an operator in the event electric charges were to issue between the powder hose (84) and the hookup tube (56).
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