发明名称 |
Method and device for removing, without excavation, lead and plastic pipes laid in the ground |
摘要 |
The method involves pulling, longitudinal separating, and expanding devices, in order to replace underground lead or plastics piping. The old pipe (1) is cut by a knife-like cutter (6) mounted on a support (5) which is pulled along inside the pipe by a cable (4). The support is connected to an external head (7) which can travel over the pipe, and which may be conical. The head is coupled to a sleeve or production pipe (2), through which the split sections of the old pipe can be removed. The sleeve allows a new production pipe to be introduced simultaneously.
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申请公布号 |
EP0748971(A2) |
申请公布日期 |
1996.12.18 |
申请号 |
EP19960250114 |
申请日期 |
1996.05.22 |
申请人 |
BERLINER WASSERBETRIEBE ANSTALT D. OEFFENTLICHEN RECHTS |
发明人 |
GAEBELEIN, WILHELM, DR.-ING.;WILINSKI, ERICH, DR.-ING. |
分类号 |
E03F3/06;E21B7/30;F16L55/165;(IPC1-7):F16L1/028 |
主分类号 |
E03F3/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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