| 摘要 |
Automatic Grounding Device of an Electrostatic Spray Coating System The grounding device contains a cylinder (24) from electrically insulating material in which a piston (16) is movable between two different axial positions by compressed air, against the force of a mechanically prestressed compression spring (34). In the one position, the piston (16) is spaced from the grounding contact (26) a distance such that the high voltage cannot arc over in between. The voltage can be turned on only in this position of the piston (16). As the compressed air is turned off or fails due to a defect, the compression spring (34) abruptly moves the piston (16) into the other position, in which it electrically connects the compression spring (34) with the grounding contact (26). The compression spring (34) 19 electrically connected with the system components (6, 8, 10) that are arranged insulated, so that these now are grounded. In this position of the piston (16), the voltage cannot be turned on. The cylinder (24) is preferably the leg of a table on which the electrically insulated system components (6, 8, 10) are arranged. (Figure 1)
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