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Welding method of outer cylinder and bottom plate in base of lower core shell of high temperature gas-cooled reactor

A high-temperature gas-cooled reactor and welding method technology, which is applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of great welding difficulty, large hardening tendency, and control of the maximum deformation of the bottom plate, so as to meet the welding quality. requirements, welding firmness, and the effect of improving service life

Active Publication Date: 2018-08-10
SUZHOU HAILU HEAVY IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The material of the base workpiece is 12Cr2MolR. Due to the high content of Cr and Mo in the material, there is a greater tendency to harden during welding, and the welding is very difficult.
The maximum deformation of the bottom plate should be controlled at ≤9.6mm, that is to say, within the processing allowance. The current conventional welding method cannot guarantee that the maximum deformation of the bottom plate is controlled at ≤9.6mm

Method used

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  • Welding method of outer cylinder and bottom plate in base of lower core shell of high temperature gas-cooled reactor
  • Welding method of outer cylinder and bottom plate in base of lower core shell of high temperature gas-cooled reactor
  • Welding method of outer cylinder and bottom plate in base of lower core shell of high temperature gas-cooled reactor

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Embodiment Construction

[0021] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] Such as figure 1 and figure 2 As shown, in the method for welding the outer cylinder and the bottom plate in the base of the middle and lower core shell of a high temperature gas-cooled reactor according to the present invention, the two inner cylinder tooling 1 and the outer cylinder tooling 2 are placed on the site, and the inner cylinder tooling 1 and the outer cylinder The tooling 2 is cylindrical, and the diameter of the outer tube tooling 2 is larger than that of the inner tube tooling 1, and then the base plate 3 is placed on the inner tube tooling 1 and the outer tube tooling 2, and the center of the base plate 3 is in line with the inner tube tooling 1 and the outer tube tooling 1. The center of the cylinder tooling 2 is concentric, and the outer cylinder 8 is placed on the bottom plate 3, and the welding parts of the two are...

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Abstract

The invention discloses a method for welding an outer cylinder in a reactor core vessel base and a base plate in a high-temperature gas cooled reactor. By the adoption of the method, the maximum deformation of the base plate can be controlled to be 9.6 mm or below. An inner cylinder tool and an outer cylinder tool are placed on a site, then the base plate is placed on the inner cylinder tool and the outer cylinder tool, welding portions are preheated, the welding portion of the outer cylinder is divided into eight welding areas: a, b, c, d, e, f, g and h with the same arc length in the circumferential direction clockwise, positioned welding is conducted after preheating, and then a multi-layer multi-pass welding method is adopted. The multi-layer multi-pass welding method specifically comprises the steps of three-layer welding of an internal groove, three-layer welding of an external groove, welding of the fourth layer and the fifth layer of the internal groove, welding of the fourth layer and the fifth layer of the external groove, complete welding of the internal groove, and complete welding of the external groove. The method has the advantages that the maximum deformation of the base plate can be controlled to be 9.6 mm or below, welding is firm, the requirement of the nuclear power field for welding quality is met, and the service life of the base is prolonged.

Description

technical field [0001] The invention relates to a method for welding an outer cylinder and a bottom plate in a base of a lower core shell in a high-temperature gas-cooled reactor. Background technique [0002] With the introduction of the "fourth generation advanced nuclear energy system" concept, high temperature gas-cooled reactors are gradually characterized by their unique safety, wide range of uses, miniaturization, low investment, and short construction period following the introduction of the concept of modular high temperature reactors. And other characteristics have won the favor of more and more people of insight. [0003] The high-temperature gas-cooled reactor is an advanced reactor with the safety characteristics of the fourth-generation nuclear energy system. It is one of the six alternative reactor types in the fourth-generation nuclear energy system in the international nuclear energy field, and it is the only one that can achieve commercial operation before ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K31/02
CPCB23K31/02
Inventor 蔡玉何静缪冰王佳仁梅少兵胡法议
Owner SUZHOU HAILU HEAVY IND
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