Device and method for machining inner hole of bent pipe of nuclear power main pipeline

Abstract

The invention discloses a device for machining an inner hole of a bent pipe of a nuclear power main pipeline. The device comprises a cambered boring rod, a cutter rotating power source, a large gear ring strip and a small gear, wherein the cutter rotating power source is connected with a flange port formed at one end of the cambered boring rod; the large gear ring strip is fixedly arranged on theouter side of the cambered boring rod; the small gear is engaged with the large gear ring strip so as to drive feeding of the boring rod; and the radius of the central axis of the cambered boring rodis equal to the radius of the central axis of the inner hole of the bent pipe of the main pipeline. During machining, the cambered boring rod and the bent pipe of the main pipeline are positioned on the same horizontal plane, and moving centers of the cambered boring rod and the bent pipe are positioned on the same circle center, so that the cambered boring rod and the bent pipe can move along the same trace to realize main cutting motion similar to the trace; therefore, the desired inner hole of the bent pipe of the main pipeline can be machined. The invention also discloses a method for machining the inner hole of the bent pipe of the nuclear power main pipeline.

Description

technical field [0001] The invention relates to a mechanical processing tool, in particular to a processing device for the inner hole of a nuclear power main pipeline elbow. The invention also relates to a processing method for the inner hole of the elbow of the nuclear power main pipeline. Background technique [0002] AP1000 advanced pressurized water reactor technology belongs to the third generation nuclear power technology in the world. Among them, the steam generator of the reactor pressure vessel and the reactor coolant pump pass through such as figure 1 The reactor main piping 1 shown is connected to form a closed loop of the reactor coolant system. The size of the reactor main pipe 1 is: outer diameter d=689mm, inner diameter D=559mm, length L=3225mm of the straight pipe part, center radius R=2908mm of the bent pipe, and corresponding angle α=66.6° of the bent pipe part. It can be seen that the size of the workpiece is relatively large. Due to the high technical...

AI Technical Summary

Problems solved by technology

At present, for the machining of the inner hole of the main pipe elbow, the method of ants gnawing on the bones is adopted. Not only the workload is too large, but also the work efficiency is too low, which cannot meet the needs of production at all, and cannot realize mass production.

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