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Method for manufacturing superlarge spherical seal head

A technology of spherical head and manufacturing method, which is applied in the direction of manufacturing tools, sealing, nuclear power generation, etc., can solve problems such as wrinkling, lower molding quality, and large lower spherical surface, so as to achieve the effect of not being easily deformed and ensuring installation accuracy

Active Publication Date: 2010-09-15
CHINA NUCLEAR IND 23 CONSTR
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0002] Steel super-large spherical heads (opening diameters are usually tens of meters), such as the containment heads of large nuclear power plants, are very difficult to manufacture because they usually cannot be completed by one-shot molding
In addition, due to the relatively large curvature of the lower spherical surface of this head, it is more prone to wrinkling defects and reduces the molding quality
In addition, since the opening diameter of this spherical (bowl-shaped or pot-shaped) head is very large, the whole head (especially the opening) is prone to deformation during the lifting process of the head.

Method used

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  • Method for manufacturing superlarge spherical seal head
  • Method for manufacturing superlarge spherical seal head
  • Method for manufacturing superlarge spherical seal head

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Embodiment Construction

[0020] The present invention will be described in detail below with reference to the accompanying drawings.

[0021] The present invention can be used in the manufacture of various spherical heads, such as standard elliptical heads, dished heads and the like.

[0022] As an example, the head of the present invention is tailor-welded from a total of 64 steel plates in four ring parts. Each steel plate can be pressed into a predetermined shape by a hydraulic press.

[0023] see figure 1 and 2 , The spherical head is formed by four ring parts from the top of the ball (closed end) to the opening (open end). The first ring portion forms the closed end of the head and comprises two steel plates. The second ring part and the third ring part form the middle ring part of the head, including 6 steel plates and 24 steel plates respectively. The fourth ring part forms the open end of the head and consists of 32 steel plates.

[0024] The following examples illustrate the head manufa...

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Abstract

The invention provides a method for manufacturing a superlarge spherical seal head, which comprises the steps of: providing a first group of steel plates to form a first ring part of a spherical seal head, wherein the closed end of the spherical seal head is formed by the first ring part; providing at least one group of steel plates to form at least one middle ring part of the spherical seal head; and providing the last group of steel plates to form an outmost ring part of the spherical seal head, wherein the open end of the spherical seal head is formed by the outmost ring part. Corresponding steel plates of adjacent groups and adjacent steel plates of each group of steel plates are finally interconnected through welding. A sectional forming method is applied to the spherical seal head, the seal head is formed step by step through deformation of each area, and larger deformation is dispersed and localized, therefore, the deformation of each area can be even to effectively avoid defects, such as crinkles and the like.

Description

technical field [0001] The invention relates to a method for manufacturing a super-large spherical head, in particular to a method for manufacturing a containment head of a large nuclear power plant. Background technique [0002] It is very difficult to manufacture steel super-large spherical heads (opening diameters are usually tens of meters), such as large nuclear power plant containment heads, because they usually cannot be completed by one-time molding. In addition, due to the relatively large curvature of the lower spherical surface of the head, wrinkling defects are more likely to occur and the molding quality is reduced. In addition, since the opening diameter of the spherical (bowl-shaped or lid-shaped) head is very large, the whole head (especially the opening) is prone to deformation during the lifting process of the head. Contents of the invention [0003] The purpose of the present invention is to provide a method for manufacturing a super-large spherical hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02
CPCG21C13/02Y02E30/40Y02E30/30
Inventor 不公告发明人
Owner CHINA NUCLEAR IND 23 CONSTR
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