Dome hyperboloid forming equipment

Abstract

The invention relates to dome hyperboloid forming equipment, and belongs to the technical field of nuclear power station construction. The equipment comprises an upper roll and a pair of lower rolls which are supported on a rack and are mutually parallel, wherein the middle of the upper roll is provided with a middle convex section the length of which is 55%-65% of the width of a dome unit plate to be formed, and the two sides of the upper roll, corresponding to the width position of the dome unit plate to be formed, are provided with end convex sections which is 10%-15% of the width of the dome unit plate to be formed; the middle of each lower roll is provided with a necked-in cylindrical section, and the two sides of each lower roll are provided with end concave sections which are opposite to the end convex sections; and the generatrix of the end convex sections and the extension line of the generatrix of the middle convex section form a continuous arc the radius of which is in a preset proportion to the inner diameter of the dome unit plate. Compared with the prior art, the dome hyperboloid forming equipment provided by the invention has the advantages that the structure is simple, the operation is convenient, and production efficiency can be observably improved.

Description

technical field [0001] The invention relates to a dome hyperboloid forming equipment, in particular to a special equipment for forming a dome hyperboloid of a containment shell steel lining of a nuclear power plant, which belongs to the technical field of nuclear power plant construction. Background technique [0002] The hyperbolic panel forming process is used in the manufacture of pressure vessels and oil tank storage bins. The steel lining of nuclear power plant containment is essentially a type of pressure vessel, but it is relatively large. The steel lining of the nuclear power plant containment is composed of three parts: the bottom plate, the cylinder and the dome. The dome is a hyperboloid thin shell structure composed of two parts: a spherical belt and a spherical crown. figure 1 . Among them, the inner radius of the lower mouth of the spherical crown is 16666.66mm, the height is 6732.73mm, and the inner radius is 24000mm. Th...

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Problems solved by technology

[0004] 1. The design of the pressed membrane is complicated, the prefabrication project is large, the steel consumption is up to 10 tons, and it needs to be used in conjunction with eight hydraulic jacks, which is troublesome to operate;

[0005] 2. The operation during construction is cumbersome and complicated, and the pressing and forming of a single hyperbolic panel takes a long time, and the labor input is large, and the production efficiency is low

However, its use not only needs to roll the sheet into a cylindrical shape, but is obviously not suitable for forming large-area dome unit sheets.

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