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Electromagnetic induction heating method for ap1000 evaporator tube plate

An electromagnetic induction heating, evaporator tube plate technology, applied in induction heating, application, metal processing, etc., can solve the problem of heating AP1000 steam generator tube plate, etc., to prevent heat loss, save time, and reduce heat loss.

Active Publication Date: 2015-11-25
HARBIN ELECTRIC CORP QINHUANGDAO HEAVY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no report on heating the tube sheet of AP1000 steam generator by electromagnetic induction

Method used

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  • Electromagnetic induction heating method for ap1000 evaporator tube plate
  • Electromagnetic induction heating method for ap1000 evaporator tube plate

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Embodiment Construction

[0039] The present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings. The features and advantages of the present invention will become clearer and more specific with these descriptions.

[0040] In this article, "electromagnetic induction heating cable" and "induction heating cable" have the same meaning and can be used interchangeably.

[0041] In this context, "tube sheet" means the tube sheet of the AP1000 steam generator (evaporator).

[0042] step 1)

[0043] In the method according to the present invention, the purpose of step (1) is to determine the heat capacity of the heated tube sheet, thereby obtaining the heat value that the electromagnetic induction heating cable needs to generate, and thereby determining the electromagnetic induction heating power supply and cable specifications, such as output power , rated current, cable size, etc.

[0044] According to the material of the tube sheet and ...

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Abstract

The invention relates to an AP1000 evaporator tube plate electromagnetic induction heating method. The method includes: 1, calculating heat capacity of a tube plate heated to an expected temperature so as to impact a heat value, generated by electromagnetic induction between an electromagnetic induction heating cable and the tube plate, to the tube plate; 2, determining power of an electromagnetic induction heating power supply and specification of a cable; 3, designing a manufacture fixture; 4, mounting a thermocouple and the induction heating table on a non-welding surface of the tube plate; 5, heating the tube plate; 6, holding the temperature of the tube plate during welding and subjecting the tube plate to thermal post-treatment after welding. The method has the advantages that the tube plate can be quickly and evenly heated to the preset temperature, the expected temperature can be held, the time of reaching the preset temperature is significantly shortened, the different parts of the tube plate have uniform temperatures, temperature difference is small, energy consumption is greatly reduced, the process is simplified, and cost is saved.

Description

technical field [0001] The invention relates to an electromagnetic induction heating method, in particular to an electromagnetic induction heating method for an AP1000 evaporator tube plate. Background technique [0002] AP1000 steam generator is the main equipment of the third generation pressurized water reactor nuclear power plant. The tube sheet is a key component of the steam generator, which belongs to the nuclear safety level one component. The material of the AP1000 steam generator tube plate is SA-508Gr3Cl2, which has a strong tendency to cold cracks during welding. It is necessary to preheat before welding, maintain the temperature during welding, and postheat immediately after welding to avoid cracks. [0003] The heating method usually used for large nuclear power workpieces is to burn the workpiece with a gas flame or heat it in a heat treatment furnace. To maintain the temperature of the workpiece, the method of burning the non-welding surface of the workpiece...

Claims

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Application Information

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IPC IPC(8): B23K37/00H05B6/02
CPCB23K1/002B23K2101/14
Inventor 杨松孙国辉谢彦武李滨崔文博高峰李远邹迪静
Owner HARBIN ELECTRIC CORP QINHUANGDAO HEAVY EQUIP
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