Rib-free flange welding structure and welding method thereof
A flange welding and flange technology, applied in the direction of connecting components, can solve the problems of large assembly, welding, cleaning workload, welding stress concentration around the flange, hidden structural safety hazards, etc., to avoid welding stress and improve production efficiency. , the effect of improving safety
Inactive Publication Date: 2010-09-22
QINGDAO XIAOTIAN ENERGY TECH
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Problems solved by technology
[0005] During the specific welding operation, the steel pipe 1 and the flange 3 must be assembled and welded first, and then the ribbed plate 2 must be assembled and welded in sequence, resulting in a large workload of assembly, welding, and cleaning, and the welding stress around the flange is concentrated, which is easy to be welded. Cracking in relatively extreme environments such as low temperature impact has become a hidden danger to structural safety
Method used
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Embodiment 1
[0025] refer to figure 2 , The flange welding structure without ribs in the present invention includes steel pipes and flanges, the steel pipes and flanges are directly welded, and the flanges adopt a cantilever plate structure and are thickened.
[0026] The flange needs to be thickened or made of higher-strength materials. For the calculation method, refer to P410 / 411 of the "Design Manual for High-Voltage Power Transmission Lines in Electric Power Engineering" compiled by the Northeast Electric Power Design Institute of the Ministry of Energy.
Embodiment 2
[0028] The non-rib plate flange welding method of the present invention comprises the following steps:
[0029] The flange adopts cantilever plate structure, and adopts high-strength flange or thickened flange;
[0030] (1) Assemble the steel pipe 4 and the flange 5;
[0031] (2) Weld the steel pipe 4 and the flange 5 .
[0032]
[0033]
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The invention provides a rib-free flange welding structure and a welding method thereof, wherein the welding structure comprises a steel pipe and a flange which are directly welded; the flange adopts a reinforced or thickened cantilever slab structure. The rib-free flange welding method comprises that (1) the flange adopts the cantilever slab structure and the high-strength or thickened flange; (2) the flange and the steel pipe are directly assembled and then welded. As the flange adopts high-strength or thickened one through computing, cancels the rib and provides the welding method of the rib-free flange welding structure, which ensures the welding strength, reduces the work intensity of assembly, welding and cleaning, and improves production efficiency. Due to the decrease of welding amount, the generation of over welding stress is avoided so as to improve the structure safety.
Description
[0001] [0002] technical field [0003] The invention relates to the field of welding technology, in particular to a steel pipe and flange welding structure and welding method in steel structure engineering. Background technique [0004] refer to figure 1 , when steel pipe 1 and flange 3 are welded in steel structure engineering, in order to meet the force requirements, the thickness of the flange is generally designed according to the "three-sided support plate", that is, it is necessary to set ribbed plates 2 between adjacent bolt holes . [0005] During the specific welding operation, the steel pipe 1 and the flange 3 must be assembled and welded first, and then the ribbed plate 2 must be assembled and welded in sequence, resulting in a large workload of assembly, welding, and cleaning, and the welding stress around the flange is concentrated, which is easy to be welded. Cracking in relatively extreme environments such as low temperature impact has become a hidden dan...
Claims
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Inventor 张邦伟
Owner QINGDAO XIAOTIAN ENERGY TECH