| 摘要 |
<p>PURPOSE: To obtain a bolted pipe joint releasable by remote control by having two threaded regions successively in front and rear part and the first threaded region has a substantially greater pitch than the second threaded region. CONSTITUTION: A pipe joint 1 is composed of two pipe ends 2, 11 which have respectively flange 3, 12, centering aid tool which cooperates with both of the flanges, packing 10 and fixing bolt 17 for pressing the two flanges, and it can be released by remote control. The fixing bolt 17 has two threaded regions 46, 52. These two threaded regions successively engaged upon pressing the two flanges together. The first threaded region 52 has a substantially greater pitch than the second threaded region 46.</p> |
