Title:
BIMETAL SPIRAL STEEL PIPE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/045426
Kind Code:
A1
Abstract:
A bimetal spiral steel pipe comprising a pipe body (100), the surface of the pipe body (100) extending outwards to form a rib (102) which is spirally arranged around the outer wall of the pipe body. A groove (103) and an auxiliary inner steel band (200) capable of covering the notch of the groove are provided on the rib (102) and the surface of the pipe body (100). A hollow cavity (300) is formed between the groove (103) and the auxiliary inner steel band (200), and is filled with concrete (400). Also disclosed is a manufacturing method for a bimetal spiral steel pipe. By means of the bimetal spiral steel pipe and the manufacturing method therefor, the rib on the outer wall of the pipe body and the pipe body are integrally formed, and can resist the dynamic load fatigue when bearing dynamic load; the corrosion resistance and wear resistance of the steel pipe are enhanced; further, the thickness of the steel pipe main body is reduced, and material costs are reduced.
Inventors:
ZHAN FUJUN (CN)
Application Number:
PCT/CN2016/082936
Publication Date:
March 23, 2017
Filing Date:
May 22, 2016
Export Citation:
Assignee:
NANJING LIANZHONG CONSTRUCTION ENG TECH CO LTD (CN)
International Classes:
F16L9/02
Foreign References:
| CN203431333U | 2014-02-12 | |||
| CN104266006A | 2015-01-07 | |||
| CN205173741U | 2016-04-20 | |||
| CN105156771A | 2015-12-16 | |||
| CN203404502U | 2014-01-22 | |||
| KR100718869B1 | 2007-05-16 | |||
| JPS5121559A | 1976-02-20 | |||
| KR101206104B1 | 2012-12-03 |
Attorney, Agent or Firm:
NANJING SUGAO PATENT AND TRADEMARK FIRM (ORDINARY PARTNERSHIP) (CN)
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