Method for repairing high Cr cast iron dredge pump impeller

Abstract

The invention relates to a method for repairing a high Cr cast iron dredge pump impeller, and belongs to the technical field of engineering ship equipment. The method for repairing the high Cr cast iron dredge pump impeller is characterized in that bead welding is adopted to conduct recovery to the size of the position of a water sealing belt on the high Cr cast iron dredge pump impeller, it is guaranteed that an original gap between the water sealing belt and a lining board restores, and pump efficiency of the dredge pump is achieved. The method has the advantages that work efficiency of equipment is high, the working life and the replacement cycle of the equipment are long, and replace cost of spare parts is reduced; and the repairing method is convenient to operate, economical and practical, high in execution efficiency and pertinence, good in welding quality and the like.

Description

technical field [0001] The invention belongs to the technical field of engineering ship equipment, and in particular relates to a method for repairing a mud pump impeller made of high chromium cast iron. Background technique [0002] At present, with the continuous development of the shipping industry, the scale of ports and waterways is getting larger and larger, and there are more and more domestic reclamation and island building projects. During the construction of dredging projects, more and more harsh conditions in different situations will be encountered: In dredging projects, excavation of a large number of weathered rocks, reefs and various deep-sea sands is gradually increasing, and the excavation of hard weathered rocks, reefs and various coarse and fine sands has put forward higher and higher requirements for mechanical capacity and excavation efficiency. Requirements, as the core equipment of a dredging project, the efficiency of the dredge pump plays a vital rol...

AI Technical Summary

Problems solved by technology

[0003] There are many kinds of dredging pumps, but as mentioned above, as the construction environment changes, the harsh construction environment will cause different degrees of wear or damage to the impellers of each dredging pump during the dredging operation, and the damage of the impeller will directly Affect the dredging efficiency of the ship, and even affect the progress of the entire project

Since the material of the impeller of the mud pump is high-chromium cast iron, and the impeller of the mud pump is relatively large, the impeller is prone to cracking due to the difference in local temperature and welding process during the welding process. Require

However, as a large-scale spare part, the direct replacement of the impeller often has problems such as long production cycle, inconvenient transportation, and affecting normal work progress, and the cost of replacing spare parts is relatively high.

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