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Super pipeline for nuclear power plant as well as manufacturing method thereof

A technology of super pipes and manufacturing methods, which is applied in the direction of detailed information of nuclear power plants, nuclear power plants, nuclear power generation, etc., can solve the problems that cannot meet the use of super pipes, and achieve the goal of increasing the limit of low-cycle fatigue strength, improving the strength of the pipe body, and reducing costs Effect

Inactive Publication Date: 2012-05-16
CHINA NUCLEAR POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, under accident conditions, the safety function of the main steam safety valve can be guaranteed to ensure that this section of the pipeline does not break or leak. The existing pipeline cannot be used as a super pipeline for nuclear power plants.

Method used

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  • Super pipeline for nuclear power plant as well as manufacturing method thereof
  • Super pipeline for nuclear power plant as well as manufacturing method thereof
  • Super pipeline for nuclear power plant as well as manufacturing method thereof

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Embodiment Construction

[0037] A kind of super pipe for nuclear power plant of the present invention and the embodiment of manufacturing method thereof are introduced below in conjunction with accompanying drawing:

[0038] Such as Figures 1 to 6 As shown, a super pipeline includes a pipeline 5 and a slam limiter 6; the pipeline is divided into a first section and a second section, the first section is installed upstream of the main steam isolation valve 7, and the second section is installed at the main steam isolation valve Downstream of 7, the nozzles are distributed on the pipeline 5, including 10" nozzle 1, 3" nozzle 2, 4" nozzle 3 and 6" nozzle 4. The nozzle is cylindrical, and its lower end is smoothly transitioned to the pipeline. The size and quantity of the nozzle 2 are determined according to the design requirements. Through extrusion molding, its position is determined according to other pipes connected to the super pipe; the slam limiter 6 is welded together with the second pipe 5, and ...

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Abstract

The invention belongs to the field of pipelines, in particular to a super pipeline for a nuclear power plant as well as a manufacturing method thereof, which aims at providing the super pipeline and the manufacturing method thereof for meeting the usage environment requirements on the nuclear power plant. The super pipeline for the nuclear power plant comprises a whipping limiting part (6); a pipe nozzle is distributed on a pipeline (5) and formed by extrusion, the pipe nozzle is cylindrical, the lower end of the pipe nozzle is in smooth transition with the pipeline, and the position of the pipe nozzle is determined by other pipelines connected with the super pipeline; and the second section of the pipeline (5) is welded with the whipping limiting part (6). The manufacturing method of thesuper pipeline of the nuclear power plant comprises the following three steps of: (1) extruding the pipe nozzle for thermal forming; (2) thermally treating; and (3) manufacturing and welding the whipping limiting part. The pipe nozzle formed by extrusion enables the super pipeline section to have an integral reinforcement structure; and the invention improves the stressed structure, increases pipe strength and reliability, and reduces the cost.

Description

technical field [0001] The invention belongs to the field of pipelines, and in particular relates to a super pipeline for nuclear power plants and a manufacturing method thereof. Background technique [0002] Pipelines are an important part of nuclear power plants, thermal power, petrochemical and other civil engineering facilities. Among them, high-temperature and high-pressure high-energy pipelines are also relatively common. The special difference between super-pipelines for nuclear power plants and other high-energy pipelines is that they are connected to the main steam safety valve. It is required to ensure the integrity of its function and structure under the following working conditions: [0003] (1) Normal operating conditions (from zero power to full load operation); [0004] (2) Injection conditions of safety valve and atmospheric discharge valve; [0005] (3) Steam hammer is generated when the isolation valve of the steam turbine is closed rapidly; [0006] (4)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21D1/00B21C23/08
CPCY02E30/40Y02E30/00
Inventor 李云屹王红扬沈桢禧辛培梅杨晓丽韩国庆战仕全
Owner CHINA NUCLEAR POWER ENG CO LTD
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