| 摘要 |
A method of coupling a reducer and a flexible tube and a structure thereof are provided to improve the structure of the reducer so that a connection part of the reducer is assembled airtightly without a welding work. At least one packing grooves(12a,12b) and locking grooves(12c) are provided at one end of a reducer(12) having a sprinkler. Packings(14a,14b) are inserted into the packing groove to maintain air tightness. A curved part(13a) of the flexible tube is positioned at the locking groove so that the curved part is not separated from a stop ring(15). The stop ring has a ring shape. The packing grooves and the locking grooves are ground. The packing grooves and the locking grooves are formed when the reducer is forging-shaped.
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