Cold metal transition welding repairing method for wear or breakage of jet nozzle of universal pitot tube pump

Abstract

The invention belongs to the field of repairing general-purpose pitot tube centrifugal pumps in the petrochemical industry, and relates to a repair method for general-purpose pitot tube pump nozzle wear or fracture cold metal transition welding. The method includes the following steps: (1) according to the damage degree of the pitot tube nozzle, determine the repair plan of the nozzle; (2) find the processing reference for the worn sealing ring, and make the tooling; (3) remove the output end of the damaged pitot tube nozzle , Process the welding groove; (4) Make a new nozzle output end blank according to the survey drawing; (5) Match the new nozzle output end with the original shaft; (6) Cold metal transition welding; (7) Surfacing layer Relieve stress; (8) Remove welding tooling, finishing, drilling. The invention removes the damaged output end, reprocesses a blank, assembles it with the original nozzle output end, adopts the cold metal transition welding method, and then reprocesses it to the original size, so as to restore the service performance of the pitot tube pump nozzle.

Description

technical field [0001] The invention belongs to the field of repairing general-purpose pitot tube centrifugal pumps in the petrochemical industry, and relates to a repair method for general-purpose pitot tube pump nozzle wear or fracture cold metal transition welding. Background technique [0002] Pitot tube pump is a new type of industrial centrifugal pump with small and medium flow rate and high head, which is widely used in petrochemical industry. The pump has only one stage of impeller, simple structure, low speed, long service life and low maintenance cost. Pitot tube pumps consist of rotors, pitot tube nozzles, bearing housing components, outer casing and inlet and outlet tubes, the pump casing forming the housing for the rotating assembly that surrounds the stationary pitot tube nozzle. Generally speaking, the static pitot tube nozzle is not easy to be damaged during use. The main consumable part of the pump is the sealing ring. Only when the sealing ring is damaged ...

AI Technical Summary

Problems solved by technology

Generally speaking, the stationary pitot tube nozzle is not easy to be damaged during use. The main consumable part of the pump is the sealing ring. After the sealing ring is damaged, the eccentric vibration of the rotating shell will be large, resulting in the failure of the nozzle.

The pitot tube nozzle is the channel for conveying the medium, once damaged it will bring fatal damage to the pitot tube pump

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