| 摘要 |
PURPOSE: A coupling structure of steel tubes is provided to reduce work time by coupling the steel tubes by packings and adhesive. CONSTITUTION: In a structure for coupling a first steel tube(1) with a second steel tube(3), an expanding unit(2) is formed at the rear of the first steel tube. A discharge port(4) is mounted at the top of the expanding unit, and has a discharge valve(5). An injection port(6) is mounted at the bottom of the expanding unit, and has an injection valve(10). Packings(8,9) are mounted between the expanding unit and the front end of the second steel tube. Adhesive(7) is filled between the expanding unit and the front end of the second steel tube, and the packings.
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