Method for manufacturing first layer of steel lining dome of nuclear power station
A manufacturing method and technology for steel lining, which are applied to manufacturing tools, arc welding equipment, welding equipment, etc., can solve the problems of difficulty in guaranteeing the welding quality of the first layer of the dome, low welding efficiency of manual arc welding, etc., so as to improve the welding quality and welding efficiency. Efficiency, quality assurance and production efficiency, the effect of controlling deformation
Active Publication Date: 2013-07-31
CHINA NUCLEAR IND HUAXING CONSTR
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Problems solved by technology
The prefabrication of the first layer of the steel-lined dome usually adopts traditional manual arc welding to ensure the welding quality of the dome, but the spherical curvature of the first layer of the dome is relatively large, and the welding efficiency and welding quality of manual arc welding are dependent on human factors It is easy to produce welding defects caused by subjective factors during the welding process of the dome, which makes it difficult to guarantee the welding quality of the first layer of the dome, and the welding efficiency of manual arc welding is relatively low
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[0013] The manufacturing method of the first layer of the steel-lined dome of the nuclear power plant of the present invention comprises the following steps successively:
[0014] Step 1. According to the design documents and drawing requirements of the first layer of the dome, a tire mold that matches the first layer of the dome wall panel is produced, and the radian requirements and dimensional accuracy of the tire mold are guaranteed, as well as the position of the bisected plate on the tire mold. The splicing weld is not in the suspended position, and it is closely attached to the tire mold;
[0015] The end with the longer arc length of the tire mold is defined as the end A, the end with the shorter arc length of the tire mold is defined as the E end, the outside of the A end is the No. 1 position, and the outside of the E end is the No. 2 position; The projection of the E end on the steel platform is divided into AB, BC, CD and DE segments in sequence;
[0016] Step 2: ...
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The invention provides a method for manufacturing the first layer of a steel lining dome of a nuclear power station, which comprises the following steps of: (1) manufacturing a required die to ensure the curvature requirement and the dimensional accuracy of the die and no suspended weld seam on a equally dividing plate; (2) fabricating an equally dividing plate conforming to the requirements such as dimensional accuracy and the like; (3) fixing the equally dividing plate in a corresponding position on the die; (4) welding a steel plate backing on the outer side of one end of the die in contact with a steel platform; (5) lifting one end of the die by using a forklift truck so that the weld seam welding position of the equally diving plate on the die stays in a nearly horizontal state; (6) carrying submerged arc automatic welding on weld seams of the equally dividing plate; (7) welding all weld seams on the convex surface to form a wall plate on the first layer of a dome, and welding an anchoring support on the convex surface; (8) removing the wall plate from the die, and turning the wall plate by 180 DEG so that the concave surface of the wall plate faces upward; and (9) repeating the step (5) to the step (6), and welding weld seams on the concave surface of the wall plate until all weld seams are welded. With the manufacturing method provided by the invention, the welding quality and efficiency can be obviously improved.
Description
technical field [0001] The invention relates to a method for manufacturing a steel-lined dome of a nuclear power plant, in particular to a method for manufacturing the first layer of a steel-lined dome for a nuclear power plant, and belongs to the technical field of building steel structure construction. Background technique [0002] The steel lining is a sealed shell composed of four parts: the bottom plate, the truncated cone, the cylinder and the dome. It is a part of the containment vessel of the nuclear power plant. The role of preventing nuclear leakage under extreme accidents, its quality directly affects the civil construction period of the nuclear island and the safety, reliability and service life of the nuclear power plant during operation. The installation and welding of the steel lining requires a large amount of welding and a long construction period. [0003] In order to improve the welding efficiency of the first layer prefabrication of the steel-lined dome ...
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IPC IPC(8): B23P15/00B23K9/18B23K9/32B23K37/04
Inventor 何云志陈明国徐涛王立国许开勋
Owner CHINA NUCLEAR IND HUAXING CONSTR