Welding method for tube plate and header of steam generator of high temperature gas cooler reactor

A technology of steam generator and high temperature gas-cooled reactor, which is applied in welding equipment, welding accessories, arc welding equipment, etc., can solve the problems of difficult welding of tube sheets and headers, perforated welding, and impervious welding, so as to avoid welding failure. Penetration, solving difficult welding, and meeting the effect of demanding requirements

Active Publication Date: 2019-08-30
SHANGHAI ELECTRIC NUCLEAR POWER EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the technical solution of the present invention is to provide a welding method, which can effectively solve the problem of difficult welding of the steam generator tube plate and header of the high temperature gas-cooled reactor, and can meet the welding quality requirements of the high temperature gas-cooled reactor
[0005] The technical scheme of the invention solves the problem of difficult welding of the tube plate and header of the high temperature gas-cooled reactor steam generator by controlling the groove size, assembly gap, misalignment amount and adjusting the welding method, and avoids impenetrable welds during the welding process , welding perforation and other phenomena, using a series of method parameters provided by the technical solution of the present invention for welding, effectively realizing the single-sided welding and double-sided forming of the tube sheet and the header, which can fully meet the stringent requirements of high-temperature gas-cooled stacking for welding, overcome A major problem in the manufacturing process of steam generators for high-temperature gas-cooled reactors

Method used

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  • Welding method for tube plate and header of steam generator of high temperature gas cooler reactor
  • Welding method for tube plate and header of steam generator of high temperature gas cooler reactor
  • Welding method for tube plate and header of steam generator of high temperature gas cooler reactor

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Embodiment 1

[0033] Such as figure 1 As shown, the welding method of the tube plate and the header of the high temperature gas-cooled reactor steam generator according to the embodiment of the present invention, the tube plate is the first forging ring, and the header is the second forging ring, including the following steps:

[0034] 1) processing grooves on the first forging ring and the second forging ring respectively;

[0035] 2) Assemble the first forging ring and the second forging ring to realize groove alignment and form a weld;

[0036] 3) passing an inert gas to the outer surfaces of the assembled first forged ring and the second forged ring;

[0037] 4) Weld from the bottom of the weld between the first forged ring and the second forged ring to the top of the weld along the weld in the first direction; then from the weld between the first forged ring and the second forged ring welding the bottom of the seam to the top of the seam in a second direction along the seam, the firs...

Embodiment 2

[0040] combine figure 2 and image 3 As shown, taking the 800H forged ring butt welding with a size of φ960×77.5×200mm as an example, the ERNiCr-7A welding wire with a size of 1.2mm is used for automatic argon tungsten arc welding. The specific process is as follows:

[0041] 1) Groove 2 is processed on two forging rings 1 respectively, and the blunt edge thickness of groove 2 is d 1The groove surface roughness Ra is 6.5, and the groove surface angle α is 3.5 degrees. During the machining process, the groove size of the two forging rings must be strictly guaranteed to ensure the subsequent assembly requirements;

[0042] 2) Assemble the two forged rings with bevels, and the gap at the root after assembly is d 2 0.8mm, misalignment is 0.6mm;

[0043] 3) Pass argon gas on the outer surface of the assembled forging ring for 20 minutes to remove the air on the outer surface;

[0044] 4) According to the welding method parameters shown in Table 1, automatic welding of argon tu...

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Abstract

The invention discloses a welding method for a tube plate and a header of a steam generator of a high temperature gas cooler reactor. The tube plate is a first forging ring and the header is a secondforging ring. The welding method comprises the following steps that (1) grooves are machined on the first forging ring and the second forging ring; (2) the first forging ring and the second forging ring are assembled, and the grooves are aligned; (3) inert gas is fed to the outer surfaces of the assembled first forging ring and second forging ring; (4) welding is sequentially conducted from the bottom of a weld joint between the first forging ring and the second forging ring to the top of the weld joint along the weld joint in the first direction and the second direction, and the first direction and the second direction are opposite; (5) welding continues being conducted on the weld joint obtained in the step (4) until fully welding the whole groove. The welding method for the tube plate and the header of the steam generator of the high temperature gas cooler reactor can effectively solve the problem that due to a narrow back space, welding is difficult to conduct between the tube plate and the header of the steam generator of the high temperature gas cooler reactor, avoids the problems that in the welding process, welding is not thorough, and a burnt hole is generated, improves the welding quality and achieves a stable welding effect.

Description

technical field [0001] The invention relates to the field of welding, in particular to a welding method for a tube plate and header used in a high-temperature gas-cooled reactor steam generator. Background technique [0002] Due to the unique space tube layout and double tubesheet structure of the high temperature gas-cooled reactor steam generator, its preparation method is different from that of the traditional pressurized water reactor, especially for the tube sheet and header at the outlet end of the high temperature gas-cooled reactor. The space is narrow, and it is impossible to weld through the common processing of double-sided grooves, so the welding is very difficult. In addition, the outlet end of the high-temperature gas-cooled reactor is in a high-temperature and high-pressure environment, so the welding quality of the butt weld between the forged rings The requirements are extraordinarily strict. [0003] Therefore, there is an urgent need to provide a welding ...

Claims

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Application Information

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IPC IPC(8): B23K9/133B23K9/167B23K9/095B23K9/32
CPCB23K9/095B23K9/133B23K9/167B23K9/32
Inventor 鲁艳红张茂龙盛旭婷
Owner SHANGHAI ELECTRIC NUCLEAR POWER EQUIP CO LTD
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