Water turbine volute welding method

A welding method and technology for hydraulic turbines, which are applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of unsatisfactory welding quality of the volute of the hydraulic turbine, and improve the one-time pass rate of welding, stable welding quality of the volute, and welding. The effect of cycle shortening

Active Publication Date: 2017-08-29
CHINA THREE GORGES CORPORATION +1
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Problems solved by technology

[0004] The present invention overcomes the deficiencies of the prior art and provides a welding method for the volute of a water turbine, which is used to solve the technical problem of unsatisfactory welding quality of the volute of the existing water turbine

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  • Water turbine volute welding method

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Embodiment Construction

[0050] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0051] In view of the problems mentioned in the background technology, for this reason, after summarizing the experience in the welding of the turbine volute, and according to the characteristics of the high-strength steel used for the turbine volute, the welding process and process of the circular seam of the volute and the longitudinal seam of the transition plate have been studied and adjusted. , and proposed the "two rings and one disc" welding process for the turbine volute. Practice has proved that the "two rings and one plate" welding process not only realizes the simultaneous welding of the circular seam and longitudinal seam of the volute, effectively ensures the welding ventilation conditions, significantly improves the welding construction environment, and stabilizes the welding quality of the tur...

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Abstract

The invention discloses a water turbine volute welding method. The water turbine volute welding method comprises the steps that firstly, positioning sections of a water turbine volute are adjusted and positioned, and positioned welding is conducted on circular seams of volute branch pipe sections; secondly, one side or two sides of each positioning section are welded to the circular seam of the volute branch pipe section adjacent to the positioning section, then the circular seam of the volute branch pipe section adjacent to the positioning section and the circular seam of the next volute branch pipe section are welded, and afterwards the upper butterfly edge and the lower butterfly edge of the positioning section are welded, or the circular seam of the next volute branch pipe section and the circular seam of the volute branch pipe section after the next volute branch pipe section are welded at the same time; thirdly, the upper butterfly edge and the lower butterfly edge of the next volute branch pipe section are welded, or the circular seam of the volute branch pipe section after the next volute branch pipe section and the circular seam of another volute branch pipe section are welded at the same time, and the other volute branch pipe sections are welded in the same way. By the adoption of the water turbine volute welding method, the welding ventilation condition is effectively guaranteed, the welding construction environment is remarkably improved, and the welding quality of the water turbine volute is stabilized.

Description

technical field [0001] The invention relates to the technical field of hydraulic turbine volute welding, in particular to a hydraulic turbine volute welding method. Background technique [0002] The installation of the volute of the water turbine is an important task in the installation of the water turbine unit. There are a lot of on-site welding work during the installation process, and the on-site welding construction process is harsh. [0003] The traditional welding process of the volute is to weld the upper and lower butterfly edges synchronously and symmetrically after the circumferential seam of the volute is welded. After the ordinary pipe joints and make-up joints are welded, a closed space is basically formed in the volute. Since the welding area and the surrounding 100mm range must be preheated to 120°C before welding, the ambient temperature is very high, and the ventilation conditions are limited. It is easy to cause fatigue or heatstroke of workers, and it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K31/02
CPCB23K31/02
Inventor 张润时蔡肇斌冉毅川肖可畏冷瑞田井成邱伟东赵永胜
Owner CHINA THREE GORGES CORPORATION
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