Inflation protection device and method for welding of pipe fitting
A protection device and welding technology for pipe fittings, applied in welding equipment, welding accessories, arc welding equipment, etc., can solve the problems of difficult to meet the welding quality requirements, huge material costs, insufficient welding quality, etc., to achieve fast and convenient continuous welding, Shorten the preparation time and provide the effect of anti-oxidation protection
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[0016] A pipe fitting welding inflatable protection device, such as figure 1 , figure 2 , including a central axis tube 1, an expansion air bag 2 that can expand to both sides of the axial direction is installed outside the central axis tube, and a slide plate 3 that can slide axially is respectively set on the central axis tube on both sides of the expansion air bag, between the two slide plates A support rod assembly 4 for supporting the pipe wall is arranged between them. The support rod assembly includes a plurality of support rod pairs composed of two symmetrically arranged support rods 40. The two support rods 40 of the support rod pair are symmetrically arranged, and one end thereof is connected with the The connecting plate 41 at the middle position of the two slide plates is hinged, and the other end is free; the two slide plates 3 are hinged with the push rod 5 at the position corresponding to the support rod 40, and one end of the push rod 5 is hinged with the slid...
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