Drawing device and method of nuclear power super pipeline nozzles

Abstract

The invention discloses a drawing device and method of nuclear power super pipeline nozzles, and aims to solve the technical problem of drawing of a nozzle on a nuclear power super pipeline. The drawing device comprises a base platform, a drawing die, a rotary flame heating mechanism, a rotating driving mechanism, a lifting arm, a lifting cylinder and a PLC (programmable logic controller) system, wherein the base platform is fixed on the level ground; the drawing die is installed on one side of the base platform; the lifting cylinder is fixedly installed on the other side of the base platform; the telescopic arm of the lifting cylinder is connected with the lifting arm; the lifting arm adopts an inverted L-shaped structure; the tail end of the lifting arm is positioned above the drawing die; the rotary flame heating mechanism is installed at the tail end of the lifting arm. The drawing device not only realizes automation control, reduces the labor intensity of operators and improves operating conditions, but also improves the production efficiency and guarantees the product quality.

Description

technical field [0001] The invention relates to a pipe nozzle drawing device and a drawing method, in particular to a nuclear power super pipe nozzle drawing device and method, belonging to the technical field of steel pipe processing. Background technique [0002] The nuclear power super pipe is an important part of the main steam pipe of the nuclear power plant. Since it is connected with the safety valve, it is necessary to install nozzles on the pipe wall. In order to meet the design requirements of nuclear power pipelines, the upper nozzle of the super pipeline should be integrally formed with the parent pipe to ensure the continuity of the internal fiber structure of the pipeline and the nozzle material. [0003] The traditional nuclear power super pipe nozzle processing adopts the method of prefabricating the nozzle first, and then welding the nozzle and the main body of the pipe part. This is not only a cumbersome process, but also has problems such as limited produc...

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Problems solved by technology

[0003] The traditional processing of nuclear power super pipe nozzles adopts the method of prefabricating the nozzle first, and then welding the nozzle and the main body of the pipe parts. This is not only cumbersome, but also has problems such as limited product use and short service life due to weld seams.

Although some production enterprises have adopted the extrusion molding process at present, by heating the pipe and extruding it with a mold to locally produce plastic deformation of the pipe, so as to obtain a nozzle that meets the size requirements on the pipe matrix, but in the prior art, due to the use of The overall heating method of the pipe not only has high labor intensity and low work efficiency for the operator, but also requires grinding work after the nozzle is formed, resulting in a waste of energy

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