Method of making high-pressure vessels

FIELD: storing or distributing liquids or gases.

SUBSTANCE: method comprises molding at least of two sections of the vessel whose one bottom has an opening, and joining the sections together by outer and inner seam weld. The inner welding is performed before the outer welding. The inner and outer seams are overlapped. The inner seam weld is performed through the opening in the bottom of one of the sections to be welded.

EFFECT: reduced labor and metal consumptions.

1 cl, 3 dwg

 

The invention relates to the manufacture of pressure vessels and may be used in the manufacture of high-pressure cylinders designed for storage and transportation of compressed or liquefied gases.

A known method of manufacture of tanks, including the application of girth weld from the inside, and then outside, and the internal weld bead is used as the root of the weld, is equivalent to the inner lining (see French patent No. 2492050, IPC F 17 1/00, publ. 16.04.1982).

However, this method of manufacturing a welding does not provide the uniformity of the residual stresses in the weld and can lead to the formation of cracks in the finished product.

The objective of this invention is the provision of uniformity of residual stresses in the weld.

The technical result is reduced waste, and therefore, labor, and metal.

This technical result is achieved by the fact that in the known method of manufacturing pressure vessels, including forming at least two parts of vessels, welding them together first the inner and then the outer ring joints, inner and outer joints are filled with overlap each other, and welding the inner seam lead through the hole in the bottom of one of the welded parts.

In addition, the overlap of the inner and outer seams is carried out by blending each of the joints to a thickness of more than half the wall thickness of the welded parts.

Figure 1 and figure 2 depicts the sequence of the method for manufacturing pressure vessels for example a high-pressure bladder. Figure 3 shows the execution of internal and external welds overlapping each other.

A method of manufacturing pressure vessels includes forming at least two parts of vessels, welding between the inner 1 and outer ring 2 stitches, at least, two parts 3, 4, and welding 1 internal seam is produced earlier than the 2 outer seam. The inner 1 and outer 2 joints are filled with overlap each other (see figure 2). The internal welding seam lead through the hole 5 in one of the welded parts.

Overlap the inner 1 and outer 2 seams is carried out by blending each of the joints to a thickness of more than half the thickness of the shell of the welded parts from the condition

a>and>a/2,

where a is the thickness of the wall.

in - depth of penetration in the weld metal.

Implementation of the proposed method of manufacturing pressure vessels will improve the quality and strength of the weld due to the mutual penetration with overlapping inner and outer seams, will is kanemite metal by reducing the scrap rate, reduce the complexity of manufacturing, which is one of the important factors in large-scale and mass production of products.

1. A method of manufacturing a pressure vessel, comprising forming at least two parts of the vessel, the bottom one of which has a hole, weld them together inner and outer annular welds, the welding of the inner seam to produce the outer welding seam, characterized in that the inner and outer joints are filled with overlap each other, the internal welding seam lead through the hole in the bottom of one of the welded parts.

2. The method according to claim 1, characterized in that the overlapping of the inner and outer seams is carried out by blending each of the joints to a thickness of more than half the wall thickness of the welded parts.



 

Same patents:

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EFFECT: enhanced permissible loading and decreased weight and cost.

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3 dwg

Pressure vessel // 2244868

FIELD: storing or distributing gases or liquids.

SUBSTANCE: pressure vessel has cylindrical shell made of spiral and ring layers which are made of a fiber composite material and bottoms with flanges made of spiral layers and set in openings. The thickness of the cylindrical shell uniformly decreases along the length in the direction to the bottom with greater opening due to the decrease of the thickness of the ring layers.

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6 cl, 4 dwg

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EFFECT: simplified design of bottle, enhanced technological effectiveness of making it.

6 cl, 4 dwg

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