| 摘要 |
PROBLEM TO BE SOLVED: To provide a nozzle for drying inner surface of steel pipe for oil well pipe which can dry an inner surface screw part of screw coupling part of an oil well pipe for shorter time and more evenly than heretofore and can be applied for drying the whole length of inner surface of the steel pipe for oil well pipe. SOLUTION: The nozzle 4 comprises: a flange plate 8 which is disposed on an outlet outer circumferential part of a connection pipe 6 with an air flow pipe 5 and assumes an incline angleθ2 to a connection pipe 6; an air-passable perforated plate 7 disposed on the inner surface side of the connection pipe 6; and a dish-like plate 9 which is attached to the air-passable perforated plate 7 with a shaft, assumes an inclined angleθ1 with the connection pipe 6 and faces the flange plate 8 and a connection pipe 6 outlet, wherein peripheral parts of the dish-like plate 9 and the flange plate 8 by themselves form a circular slit air flow jetting port 10. COPYRIGHT: (C)2011,JPO&INPIT
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