Water pipe for wet boring rod |
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| 申请号 | JP32072489 | 申请日 | 1989-12-12 | 公开(公告)号 | JPH02204593A | 公开(公告)日 | 1990-08-14 |
| 申请人 | Schmidt Kranz & Co Gmbh Zweigniederlassung Zorge; | 发明人 | ERUNSUTO HOFUMAN; | ||||
| 摘要 | PURPOSE: To improve the sealing property by inserting an insert pin provided with a lock pin energized outward by the spring force and a seal member into an insert end provided with a corresponding seal member and a receiver hole for lock pin. CONSTITUTION: An insert pin 6 is fixed to an inside polygonal part 5 of a central pipe 2 of a water pipe 1. An O-shaped seal ring is provided at an end of the pin 6, and a lock pin 12 is provided right in front of the moving range from a length block A to a block B, and the pin 12 is energized outward by a plate spring 15, and the pin 12 is provided with an O-shaped seal ring 14. When connecting the pin 6 of the central pipe 2 to the water pipe 1, the moving range 24 inside of the water pipe 1 cooperates with the ring 10 so as to form a seal surface, and a notch 27 provided in a wall 26 cooperates with the pin 12 for lock. Consequently, sealing property is improved. COPYRIGHT: (C)1990,JPO |
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