A friction welded pipe with connecting key and its combined structure
By setting self-reversing connection keys on the welded pipe, the problems of time-consuming, labor-intensive, and defect-prone traditional welding are solved, achieving efficient welding and improved stability and strength of concrete composite structures.
CN116447207BActive Publication Date: 2026-05-26ZHEJIANG CTB WAVEFORM STEEL WEB
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG CTB WAVEFORM STEEL WEB
- Filing Date
- 2023-04-27
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
Traditional welding connections between pipes and plates are time-consuming, labor-intensive, and prone to welding defects, affecting the stability of the welded components. They are rarely used, especially in concrete composite structures.
Method used
Friction welded pipes with connecting keys are used. The pipe body has through holes and is folded to form self-folding connecting keys, which increases the welding contact area and allows the inner and outer concrete to be connected during concrete pouring, thereby improving the bonding force and structural strength.
Benefits of technology
It improves welding strength and efficiency, enhances the stability and compressive and shear resistance of concrete composite structures, reduces welding defects, and saves materials.
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Figure CN116447207B_ABST
Abstract
This invention relates to a welded pipe and its combined structure, particularly to a friction welded pipe with a connecting key and its combined structure, comprising a welded pipe body (1), with one or more through holes (2) on the outer wall of the welded pipe body (1), and a connecting key (12) formed by folding the welded pipe body (1) along the outer edge of the through hole (2); the friction welded pipe combined structure includes a friction welded pipe with a connecting key, with one end of the welded pipe body (1) connected to the lower surface of a first steel plate (3) by friction welding. This invention, by setting a self-folding connecting key on the welded pipe, saves materials on the one hand, and on the other hand, when the welded pipe is used as a connecting key, especially in concrete composite structures, it can improve the connection strength between the concrete and the welded pipe, thereby improving the stability of the entire structure.
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