Metal expansion joint for nuclear power plant steam-water separator
A technology of steam-water separator and metal expansion, which is applied to expansion compensation devices for pipelines, passing components, pipe components, etc., which can solve problems such as axial displacement, improve reliability, solve axial displacement problems, and ensure operation Effect
Pending Publication Date: 2020-01-17
CNNC FUJIAN FUQING NUCLEAR POWER
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Problems solved by technology
[0005] The purpose of the present invention is to provide a metal expansion joint for the steam-water separator in a nuclear power plant, which can solve the problem of axial displacement caused by thermal expansion and contraction of the steam-water separation reheater in the nuclear power plant.
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[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0027] Such as figure 1 A metal expansion joint for a steam-water separator in a nuclear power plant is shown, including a bellows 1 , a connecting pipe 2 , an ear plate 3 , a stud 4 , a nut 5 and a nameplate 6 .
[0028] The two ends of the corrugated pipe 1 are respectively connected with two sections of connecting pipes 2, and are firmly welded by fillet welding. Wherein, the connecting pipe 2 is a pipe structure, which is used to be connected to the drain pipe of the steam-water separator of the nuclear power plant by welding.
[0029] Such as figure 2 As shown, the ear plate 3 is a thin steel plate structure, and a hole is opened in its middle position for the installation of the double-ended stud 4 . The ear plate 3 is fixed on the connecting pipe 2 and both sides of the bellows 1 by fillet welding, the plane where the ear p...
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The invention relates to the technical field of nuclear power plant pressure vessels and particularly discloses a metal expansion joint for a nuclear power plant steam-water separator. The metal expansion joint is adopted for replacing one section of a drain pipeline of the nuclear power plant steam-water separator, size change generated in the operation and stop process of the drain pipeline of the nuclear power plant steam-water separator is absorbed through the flexible characteristic, an axial displacement problem caused by thermal expansion and cold contraction in the use process of a nuclear power plant steam-water separation reheater can be solved, operation reliability of a nuclear power plant conventional island is improved, operation safety and stability of a nuclear power unit are ensured, and personal safety of operation personnel of the nuclear power unit can also be ensured.
Description
technical field [0001] The invention belongs to the technical field of nuclear power plant pressure vessels, and in particular relates to a metal expansion joint for a steam-water separator in a nuclear power plant. Background technique [0002] The steam-water separation reheater is one of the large and important equipment of the conventional island of the M310 nuclear power plant. The main steam from the nuclear island steam generator expands step by step in the high-pressure cylinder of the steam turbine to do work, and the pressure and temperature of the steam also decrease accordingly. The low-pressure cylinder will cause brush erosion to the blades of the low-pressure cylinder. Therefore, the steam-water separation reheater assumes the role of reheating and dehumidifying the steam at the end stage of the high-pressure cylinder of the steam turbine. [0003] The steam-water separation reheater is used as a conventional island pressure vessel in a nuclear power plant. ...
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IPC IPC(8): F16L51/02F16L13/02
CPCF16L51/025F16L13/02
Inventor 喻松李京文学刘星侯晓宇洪均胡文盛杜鹏程
Owner CNNC FUJIAN FUQING NUCLEAR POWER