Automatic welding method of nuclear plant steel safety shell

A steel containment and automatic welding technology, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems that the welding schedule is difficult to be guaranteed, slag removal, grinding workload is heavy, and the quality of heat treatment cannot be guaranteed. , to achieve the effect of suppressing incomplete fusion and incomplete penetration defects, ensuring the quality and efficiency of heat treatment, and improving the quality of automatic welding

Active Publication Date: 2014-05-07
CHINA NUCLEAR IND HUAXING CONSTR
View PDF9 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The current, voltage, welding speed and other energy parameters of the SMAW process fluctuate greatly, and the probability of defects such as incomplete fusion, slag inclusions, and pores is relatively high, and at the same time, it is easy to cause local welding deformation to exceed the standard, and the stability and consistency of welding quality are relatively low. Difference
[0006] 2. The use of SMAW process requires frequent replacement of welding rods, regular interruption of the welding process, and heavy slag cleaning and grinding workload, greatly reducing welding efficiency, and it is difficult to guarantee the welding schedule
[0007] 3. The flame baking method is cyclical localized centralized heating. Under the objective condition of large heat dissipation area, the heat treatment of the weld seam using

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Automatic welding method of nuclear plant steel safety shell
  • Automatic welding method of nuclear plant steel safety shell
  • Automatic welding method of nuclear plant steel safety shell

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0058] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0059] like figure 1 As shown, the steel containment (CV) of the nuclear power plant in this embodiment includes three parts: a spherical-shaped bottom head, a cylindrical cylinder and a spherical-shaped top head, with a diameter of 39.6 m. Among them, the bottom head and the top head are made of a total of 64 hyperboloid high-strength and tough SA738Gr.B steel plates by tailor welding. The cylinder is composed of 11 circles of wall plates, and each circle is made of 12 single-curved high-strength and tough SA738Gr.B steel plates tailor-welded. Welds include vertical welds (also known as longitudinal seams) and horizontal circumferential seams (also known as circumferential welds).

[0060] Welding adopts melting electrode active gas shielded arc welding that matches solid wire and predetermined process parameters; the active gas is mixed with 80% argo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to an automatic welding method of a nuclear plant steel safety shell and belongs to the technical field of nuclear plant building. The method adopts the match between a solid core welding wire and the active gas-shielded arc welding of a consumable electrode with specific process parameters, weaving welding is adopted for vertical welding seam,s and linear welding is adopted for horizontal annular seams. According to the method, internal and appearance qualities of the welding seams of the nuclear plant steel safety shell are improved, the safety is ensured, the efficiency for welding a thick plate of the steel safety shell is greatly improved, and the welding work period is obviously shortened.

Description

technical field [0001] The invention relates to a welding method, in particular to an automatic welding method for a steel containment vessel of a nuclear power plant, belonging to the technical field of nuclear power plant construction. Background technique [0002] As an important part of the passive system, the steel containment vessel (CV) of nuclear power plants can effectively prevent the internal pressure of the containment from exceeding the design value and prevent the leakage of radioactive materials under accident conditions. It is one of the important equipment to ensure the safe operation of nuclear power plants. The steel containment vessel of AP1000 third-generation nuclear power plant is a hermetic steel container, including three parts: bottom head, cylinder body and top head. It is about 3400m, and the groove section is large. Compared with CPR1000, EPR and other reactor-type nuclear power plants, the welding workload has increased by at least 8 times. [...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B23K9/173B23K9/022B23K9/028B23K35/38B23K37/00
CPCB23K9/022B23K9/028B23K9/173B23K35/383B23K37/00
Inventor 张科青费松陈宝智秦亚林别刚刚马富巧陈美丹
Owner CHINA NUCLEAR IND HUAXING CONSTR
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap