| 摘要 |
PROBLEM TO BE SOLVED: To provide a chemical spraying apparatus capable of removing the residual pressure of a discharge pipe line in the upstream side of a branched pipe line on-off valve even when all of respective branched pipe line on-off valves of the branched pipe lines connected to each spray nozzle are closed and the spray from all spray nozzles is stopped in the spray work of the chemical. SOLUTION: The chemical spraying apparatus is provided with a five-way selector valve 21 for selectively connecting a chemical tank 2 or a cleaning liquid tank 16 to the suction side of a pump 30, the plurality of branched pipe lines 45, 46, 47, 48, 49 branched from the discharge pipe line 44 connected to the discharge side of the pump, a spray nozzle 9 connected to each of the branched pipe line, the on-off valves 23, 24, 25, 26, 27 for opening and closing each branched pipe line, cleaning nozzles 33, 34 for cleaning the inside of the chemical tank, a chemical tank discharge pipe line 59 for connecting the discharge pipe line to the cleaning nozzle and a chemical tank discharge pipe line on-off valve 28 for opening and closing the chemical tank discharge pipe line and only when the plurality of on-off valves are in a closed state, the chemical discharge pipe on-off valve is made open. COPYRIGHT: (C)2008,JPO&INPIT
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