Processing method for carbon in high temperature gas cooling nuclear reactor and internal components in stack graphite, and special equipment for production line

Abstract

The invention relates to a processing method for carbon in high temperature gas cooling nuclear reactor and internal components in stack graphite, meanwhile relates to special processing equipment for realizing the method, and belongs to the technical field of carbon block mechanical processing. The method comprises the following steps: sawing six surfaces of carbon block blank; taking the sum of carbon brick length and reserved machining allowance as an interval distance, and adopting a circumferential rotary-cut cutter, and carrying out water-cooling jacking rough machining through a set of runner holes formed on the carbon block after sawing; enabling carbon block after fixed-length jacking sawing and processing to be carbon block blank; drying and removing cooling water on the carbon block blank; and enabling dried carbon block blank to be a bottom carbon brick of a finished product through finish machining to surfaces and holes. Due to the adoption of the processing steps provided by the invention, long-term traditional processing steps are broken, the sawing step is advanced reasonably, and defects in carbon block are enabled to be discovered in time. Therefore, idle work is avoided, and advanced step is adopted for large hole trepanning, the cutting output is reduced greatly, the work efficiency is effectively improved, and wastes of precious carbon material is avoided.

Description

technical field [0001] The invention relates to a carbon brick processing method, in particular to a high-temperature air-cooled nuclear reactor carbon and graphite reactor internal component processing method, and also relates to processing special equipment for realizing the method, belonging to the technical field of carbon block machining. Background technique [0002] The internal components of the new-generation nuclear reactor are mainly constructed of carbon bricks and graphite bricks. The cross-section of the bottom carbon brick is isosceles trapezoidal, and there are cold helium flow channel holes for cooling, heat insulation, and nuclear radiation absorption. And the temperature measurement channel, the absorption ball hole, the ball unloading pipe and the thermocouple groove, etc., are built and installed at the bottom of the inner member, and are distributed in three layers in the radial direction - 30 pieces in the outer layer and the middle layer, 15 pieces in ...

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Problems solved by technology

[0003] Practice has proved that if referring to the traditional processing methods of carbon blocks in other industries (such as metallurgical industry), the following main processes are adopted: milling and grinding four sides, sawing two inclined surfaces after sawing and splitting, grinding two inclined surfaces, grinding both ends, processing on a boring machine The keyways on the two inclined planes, the upper and lower holes and grooves, etc., each process needs to be completed one by one with the help of general-purpose equipment, and there are the following problems: ①The cutting volume is large and the material utilization rate is low; The process becomes useless work; ③Multiple transfers and clamping are required between processes, not only the processing efficiency is low, but also the processed plane is easy to be bumped and damaged, resulting in waste products

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