Title:
A HYDRAULIC PUSHING-EXPANDING DEVICE
Document Type and Number:
WIPO Patent Application WO/2000/003113
Kind Code:
A1
Abstract:
The invention relates to a hydraulic pushing-expanding device used for anchoring poles or forming cavity before making poured-concrete piles. This device, which is connected with the hoist by wires, is composed of a hydraulic pushing-expanding means, a hydraulic power self-control portion and hole-depth-measuring portion and is provided with a computer and displacement sensors. The said hydraulic pushing-expanding means is formed by rigidly successively connecting a hydraulic positioning portion, a hydraulic auto-rotating portion for transferring torque, a reciprocal and pulling-type cylinder portion and several hydraulic arms for pushing-expanding a hole wall in the same circular section. By using this device, a hole depth, pressures and angles can be determined in time and sediment can be removed, can be improved. High efficiency and good quality in engineering and improvement of various steel reinforced concrete piles in buildings bases, ridges bases and other bases can be obtained.
Inventors:
HE DEXIN (CN)
Application Number:
PCT/CN1998/000206
Publication Date:
January 20, 2000
Filing Date:
September 29, 1998
Export Citation:
Assignee:
HE DEXIN (CN)
International Classes:
E02D5/54; E21B4/18; E02D5/74; E02D13/00; (IPC1-7): E21B7/28; E02D5/44
Foreign References:
| CN1142567A | 1997-02-12 | |||
| CN2242267Y | 1996-12-11 | |||
| CN2218768Y | 1996-01-31 | |||
| CN1080686A | 1994-01-12 | |||
| CN2145856Y | 1993-11-10 | |||
| CN2131899Y | 1993-05-05 | |||
| CN2110704U | 1992-07-22 | |||
| US5325932A | 1994-07-05 | |||
| EP0370396A2 | 1990-05-30 | |||
| JPS63184612A | 1988-07-30 |
Attorney, Agent or Firm:
LUNG TIN INTERNATIONAL PATENT & TRADEMARK AGENT LTD. (Room 504-511 Zhichun Road Haidian District
Beijing 8, CN)
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