| 摘要 |
PROBLEM TO BE SOLVED: To provide a multistage pole type ash dump device for ash dump around boiler heat transfer tubes aligned in a fluidized bed combustion furnace, which is easily adjustable in length. SOLUTION: This ash dump device comprises first to fourth extension poles 5-8 consisting of pipes successively increased in diameter so that a smaller diameter pipe can be successively pulled out and pushed in a larger diameter pipe, a fixed pole 9, a nozzle (not shown) attached to the tip of the first extension pole 5 with a minimum diameter, an air hose 4 for supplying compressed air connected to the nozzle and extended from the extension pole through the fixed pole, and four plate springs 12 extended forward to be shrugged from four equally divided positions of positioning hardware 11 fixed to the tip outer diameter of the fixed pole 9. The extending length can be determined depending on the position for pressing the extension pole pulled out of the fixed pole 9 by the plate springs 6. COPYRIGHT: (C)2005,JPO&NCIPI
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