Stiffening ring welding device for pressure steel pipe

Abstract

The invention discloses a welding device for a stiffening ring of a pressure steel pipe, comprising a gantry frame, a welding device telescopically erected up and down on the top of the gantry frame, and rolling positioning devices respectively arranged on opposite sides of the gantry frame. Each rolling positioning device includes: a mounting plate , which is fixed on one side of the gantry frame, and a turntable is rotatably installed through the mounting plate; the rolling assembly is located on the outside of the mounting plate, including a large gear fixed on the mounting plate, a pinion gear meshed with the outer circumference of the large gear, an extension plate fixed on the turntable, a rotary motor fixed on the outer surface of the extension plate; a positioning assembly, which includes a telescopic extension fixed on the turntable A rod, a fixed block fixed on the free end of the telescopic rod, and at least three first jacks radiating at equal intervals along the circumference of the fixed block. The invention has the beneficial effects of increasing the rotation effect, reducing the probability of slippage and improving the welding quality on the basis of the labor-saving power source.

Description

technical field [0001] The present invention relates to the technical field of welding equipment. More specifically, the present invention relates to a pressure steel tube stiffening ring welding device. Background technique [0002] In order to achieve the effect of resisting external pressure and increasing the stiffness of the steel pipe for the penstock of the hydropower station, a number of stiffening rings are generally designed on the outer wall of the steel pipe. In the welding process of the stiffened ring fillet weld of the penstock, the conventional construction method needs to set up platforms of different heights according to the situation, which is time-consuming and laborious; in addition, most of the stiffened ring fillet welds are welded by carbon dioxide gas shielded welding, and two people are usually used to control two gas machines. The welding machine performs the simultaneous welding of single-pass stiffening ring fillet welds, and the welding speed o...

AI Technical Summary

Problems solved by technology

In the welding process of penstock stiffening ring fillet welds, the conventional construction method needs to set up platforms of different heights according to the situation, which is time-consuming and laborious; in addition, most of the stiffening ring fillet welds are welded by carbon dioxide gas shielded welding, and two people are usually used to control 2 gas The welding machine performs simultaneous welding of the single-pass stiffening ring fillet weld, and often the welding speed of the welders is inconsistent, and the welding level is different, resulting in poor quality of the stiffening ring fillet weld, which affects the quality of the pressure steel pipe when it leaves the factory.

[0003] The application number is 2020204842989, and the name is a device that can realize automatic welding of stiffening rings. It discloses that rolling steel pipes are rolled by a rolling frame, and a welding device is erected on the steel pipes to jack up the steel pipes to realize welding of the stiffening rings. During the rolling process, the rollers pass through friction. The force drives the steel pipe, which is prone to slippage, resulting in poor welding quality

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