Bimetal spiral steel pipe and manufacturing method thereof

A technology of spiral steel pipe and manufacturing method, which is applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problems of increasing the stiffness of the pipe body, hidden dangers of cracking, cracking of weld seams, etc., and achieves increasing circumferential inertia moment, reducing Corrosion, the effect of greatly increased cross-sectional area
CN105156771BActive Publication Date: 2016-09-28南京大得钢管有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
南京大得钢管有限公司
Publication Date
2016-09-28

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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.
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Description

technical field

[0001] The invention discloses a steel pipe and a manufacturing method thereof, in particular to a bimetal spiral steel pipe and a manufacturing method thereof. Background technique

[0002] At present, in the transportation, storage and transportation of fluids, pipelines are generally used for transportation. Commonly used pipelines include cement pipes, plastic pipes, ordinary carbon steel pipes, stainless steel pipes, and galvanized steel pipes. Among them, the cement pipe is a prefabricated pipe made of cement and steel bars and using the principle of centrifugal force, but it is easy to leak and has poor internal pressure resistance; and the caliber is not large, generally 3 meters or less; each section of pipe The length is not long, there are many joints, the joints are easy to leak, and the construction is difficult; the foundation must be made first during construction, and the construction cost is relatively high. Plastic pipe is made of plastic r...

Claims

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