| 摘要 |
<p>PURPOSE:To attach a jig by clamping a water stop sleeve made of elastic material and the bolt of an abutting flange part which covers its outside to the external surface of piping, to facilitate pressure proofing operation, and to reduce the amount of exposure greatly. CONSTITUTION:The jig consisting of a cylindrical casing 1 with an opening part, a pressure plate 2 held by a pawl 8 provided to the casing, a slide plate 5 sliding between the casing 1 and a rubber sleeve 3, a clamping bolt 6 and a nut 7 is attached to an end surface of piping; when the clamping bolt 6 is clamped up with specific torque, the rubber sleeve and an O ring 4 are compressed and the O ring 4 becomes elliptic to be pressed against the piping 10 with large area, obtaining high tightness and preventing a fall out. Although the internal pressure of the piping operates axially to fall-out width, the pressure plate 2 is held by the pawl 8 to prevent the fall out. Further, the pressure of the internal surface of the pipng operates on the O ring 4 by the Pascal's law in the direction opposite to the fall-out force, which is therefore canceled to some extent.</p> |
