Welding device for stiffening ring of pressure steel pipe

Abstract

The invention discloses a welding device for a stiffening ring of a pressure steel pipe. The welding device comprises a portal frame, a welding device body erected at the top end of the portal frame in an up-down telescopic mode and rolling positioning devices arranged on the two opposite sides of the portal frame correspondingly. Each rolling positioning device comprises a mounting plate fixedly arranged on one side of the portal frame, wherein a turntable is rotatably mounted on the mounting plate in a penetrating manner; a rolling assembly arranged on the outer side of the mounting plate, wherein the rolling assembly comprises a large gear fixedly arranged on the mounting plate, a small gear meshed with the periphery of the large gear, an extension plate fixedly arranged on the turntable and a rotating motor fixedly arranged on the outer side face of the extension plate; and a positioning assembly which comprises a telescopic rod fixedly arranged on the turntable, a fixed block fixedly arranged at the free end of the telescopic rod, and at least three first jacks radiated in the circumferential direction of the fixed block at equal intervals. The welding device has the beneficial effects that on the basis of a labor-saving power source, the rotating effect is improved, the slippage probability is reduced, and the welding quality is improved.

Description

technical field [0001] The invention relates to the technical field of welding equipment. More specifically, the present invention relates to a penstock stiffening ring welding device. Background technique [0002] In order to achieve the effect of resisting external pressure and increasing the rigidity of steel pipes in hydropower stations, different numbers of stiffening rings are generally designed on the outer walls of steel pipes. 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 single stiffening ring fillet welds, often resulting in inconsistent welding speeds of welders and different welding levels, ...

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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