The high-pressure bladder and the manufacturing method of the pipe

 

(57) Abstract:

The invention relates to the processing of metals by pressure and can be used in the manufacture of high-pressure cylinders for storage and transportation of compressed and liquefied gases, mainly fire extinguishers. The container includes a body with a neck and fastened it by welding the sleeve, with the outer surface of the cylindrical sleeve made of a two-stage, additionally, the step of larger diameter is located inside the body and neck of the body in contact with a tread of a smaller diameter, the neck and the bottom of the case, which is a tube formed by cutting the pipe ends in the form of segments connected by butt welds. The method includes forming a cap on the housing, the fixing sleeve in the neck and the formation of the bottom with the subsequent sealing of joints, and the body of the container is manufactured from a pipe by cutting Petrovich parts in the form of segments, then the formation of the neckline and the connection with the lower rung of the sleeve with the subsequent sealing of butt welds, and the step of larger diameter sleeve fitted inside the container, and after the form DP. f-crystals, 12 ill.

The invention relates to the field of metal forming and can be used in the manufacture of high-pressure cylinders for storage and transportation of compressed and liquefied gases, mainly fire extinguishers.

The famous design of the container, including the glass neck, the edge of which is placed in the annular groove of the sleeve and the seal bushing neck is soldering [1].

A disadvantage of the known designs are the high accuracy requirements to the manufacturing process of the pressure vessel by cutting grooves in the sleeve, deep drawing cups and ensuring high-precision formation of his neck, the edge of which is placed in the annular groove of the sleeve.

It is known that the pressure vessels are thick and require significant effort at stamping, and the higher the power of the press, the lower the precision. While the manufacture of glass is a very time consuming process, requiring a long time, money, and powerful equipment.

The known high-pressure bladder, including the glass neck, the inner surface of Kotor is here made in the form of a surface of the second order, moreover, the bushing located inside the container, provided with annular thickening, in addition, the inner surface of the cap and the surface of the thickening of the sleeve in contact with the neck, is made conical [2].

The disadvantages of the known constructions of the cylinder are high requirements to accuracy of the components, the increased complexity of the process of their manufacture and Assembly of the vessel as a whole, which significantly increases the complexity of manufacturing and the cost of the high-pressure bladder.

It is known that the pressure vessels are thick and require significant effort at stamping, and the higher the power of the press, the lower the precision. Production of glass deep drawing is a very time consuming process, requiring long, powerful equipment and tools.

All this points to the lack of construction of the container under conditions of mass production.

A known method of manufacturing a cylinder pressure, comprising a fastening sleeve in formulatea, the formation of the neckline with the placement of the edges of the neck in the groove of the sleeve and the sealing joint with the sleeve by soldering [1].

The disadvantage of high manufacturing precision bushings, driver and attaching the sleeve to the driver or in the absence of such requirements, there will be a gap between the inner wall of the cap and the corresponding surface in the groove of the sleeve, thus soldering becomes simultaneously sealing and bearing element. In the latter case, decreasing the reliability of the high-pressure bladder for prolonged storage of liquefied or compressed gas. It is known that the pressure vessels are thick and require significant efforts by forging, and the higher the power of the press, the lower the precision.

A known method of manufacturing a high-pressure bladder, including the orientation of the sleeve, forming a cap on the glass, the fixing sleeve in the neck with the subsequent sealing of the first carry out the orientation of the sleeve relative to the Cup by placing it inside the jar, and after formation of the cap moves the sleeve in the direction of the neck until it stops in the inner surface of the neck [2].

The disadvantages of this method are the high complexity of the manufacture of glass, which consists in the many transitions when deep drawing and forming profile testosterogenic capacity and effort. In addition, high accuracy is required in obtaining the conical surfaces in the manufacture of the neckline and sleeves. All this increases the complexity of manufacturing and the cost of the high-pressure bladder.

The objective of the invention is to provide a reliable technological design of a high-pressure bladder and less time-consuming method of its manufacture by reducing the requirements to the accuracy of geometrical dimensions of the parts of the cylinder, reducing the number of operations and tooling and equipment and use the standard profile of the metal in the manufacture of high-pressure cylinders in terms of serial and mass production.

The problem is solved using the proposed design of a high-pressure bladder, comprising a housing with an orifice and attached to it by welding the sleeve, with the outer surface of the cylindrical sleeve made of a two-stage, additionally, the step of larger diameter is located inside the body and neck of the body in contact with a tread of a smaller diameter, the neck and the bottom of the case, which is a tube formed by cutting the pipe ends in the form of segments, soedineniya cylinder high pressure pipe, including the formation of the cap to the housing, the fixing sleeve in the neck and the formation of the bottom with the subsequent sealing of joints, and the body of the container is manufactured from a pipe by cutting Petrovich parts in the form of segments, then the formation of the neckline and the connection with the lower rung of the sleeve with the subsequent sealing of butt welds, and the step of larger diameter sleeve fitted inside the container, and after forming the bottom with the subsequent sealing of butt welds.

Design features a high-pressure bladder and its method of preparation are illustrated by the drawings.

In Fig. 1 shows the design of a high-pressure bladder, longitudinal section; Fig.2 is a view As in Fig.1; Fig.3 - view of B in Fig.1; Fig.4-12 shows the sequence of the method for manufacturing a high-pressure bladder of the pipe, where Fig.4 - cut billet of Fig.5 - cutting the top (according to the drawing) petrovoi part in the form of segments of Fig.6 - formation of the cap; Fig.7 is a view As in Fig.6; Fig.8 connection with the bushing and sealing of butt welds, Fig.9 is a view of B in Fig.8; Fig.10 - cutting the bottom (according to the drawing) petrovoi part in wider CLASS="ptx2">

The high-pressure bladder includes a housing 1 with a neck 2 and a bottom 3 and a sleeve 4 made in the form of a two-stage cylinder, and the step of larger diameter is located inside the housing. The neck 2 and the bottom 3 of the housing 1, which is a tube formed by cutting the pipe ends in the form of segments connected by butt-welded seams 5, 6 and 7.

The tightness of the connection neck 2 with the sleeve 4 is provided an annular lap welding seam 5.

Tapered threaded hole in the sleeve 4 is designed for fastening of the valve, which in Fig.1 is not shown.

The work of the high-pressure bladder is as follows.

The gas stored in cylinders under high pressure acts on the sleeve 4 at its stage of a larger diameter inside the neck 2 of the container. Thus, the power element in the connection sleeve 4 with the neck 2 of the tube 1 during the operation of the container are formed segment Primorskoye part of the tube. In this case, the roughness of the mating surfaces of the segments of the pipe and the sleeve 4, the gas cannot penetrate into the atmosphere, as sealing elements in the above-mentioned compounds are ring overlaps the giving of gas, are the segments formed from the bottom petrovoi part of the tube 1 and the sealing element is a radial butt welds 7.

The proposed method of manufacturing a high-pressure bladder of the pipe includes a segment of the workpiece 1 from the pipe (Fig.4), cutting the top petrovoi part in the form of segments (Fig.5) and the formation of the cap 2 on the housing 1 (Fig. 6 and 7), the connection sleeve 4 of the neck 2 and the fixing lower level it with the subsequent sealing of the radial butt welds 6 and lap-welded seam 5 (Fig.8 and 9), and the step of larger diameter sleeve fitted inside the container.

Then form the bottom 3 (Fig.11) by cutting the bottom petrovoi of the housing 1 in the form of segments (Fig.10) with the subsequent sealing of joints radial welds (Fig.12).

Cutting the top and bottom Petrovich sections of the housing 1 with the formation of the segments may be, for example, cutting down on the press and the formation of the neck 2 and the bottom 3 cold deformation.

Example. Produced tank of high pressure Pslave=22.5 MPa. The name of the container BVD-2000. Brand fire extinguisher - OU-2. The dimensions of the cylinder 108 x 325 mm Weight balloon - 5.1 kg Section is stayed by cutting down on the press segments of length 20 mm and forming the neckline to 58 mm

The sleeve was manufactured two of the hot-rolled round steel 68 GOST 2590-88 / 20 GOST 1050-88 in dimensions 68 x 58 x 28 mm, the end 68 mm is inside the cylinder. The connection of the sleeve with the upper mouth of the tube and the sealing segment joints were made by drawing on the joints sealing ring nahlystovogo and radial butt welds according to GOST 14771-A4-MP

The bottom was formulados of segments that were cut down in length 49 mm and germetizirovany by drawing on the radial joints of welded joints according to GOST 14771-U2-MP

Implemented the design and manufacture of high-pressure bladder BVD-2000 is possible to reduce the accuracy requirements of production, reduce waste and reduce the complexity of manufacturing 2.4 times in comparison with the prototype [2].

The proposed method of manufacture and design of high-pressure bladder allows to increase reliability, durability and manufacturability, reduce the accuracy requirements of production, to reduce the number of operations and technological equipment and to use the standard profile metal in the manufacture of high-pressure cylinders in terms of serial and mass production, the mind is="ptx2">

1. Cylinder high pressure, comprising a housing with an orifice and attached to it by welding the sleeve, wherein the outer surface of the cylindrical sleeve made of a two-stage, at this stage of larger diameter is located inside the body and neck of the body in contact with a tread of a smaller diameter, the neck and the bottom of the case, which is a tube formed by cutting the pipe ends in the form of segments connected by butt welds.

2. A method of manufacturing a high-pressure bladder of the pipe, including the formation of the cap to the housing, the fixing sleeve in the neck and the formation of the bottom with the subsequent sealing of the joints, characterized in that the body of the container is manufactured from a pipe by cutting Petrovich parts in the form of segments, the formation of the neckline and the connection with the lower rung of the sleeve with the subsequent sealing of butt welds, at this stage of the larger diameter sleeve fitted inside the container, and after forming the bottom with the subsequent sealing of butt welds.

 

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FIELD: plastic working of metals, namely manufacture of high-pressure bottles.

SUBSTANCE: method comprises steps of forming shell; swaging at least one open end of shell; forming bottom and mouth while making at least two mutually joined cone surfaces and increasing central angle from shell to mouth; at least after one swaging operation performing heat treatment of swaged end of shell. High-pressure bottle includes shell and two bottoms. One bottom has mouth for placing locking means. Bottom and mouth are made as one piece. Bottom from shell until mouth is in the form at least of two joined lateral surfaces of circular regular truncated cones. Each such joint is performed due to joining lateral surfaces of truncated cones along lines of bases of their small and large diameters respectively. Said joints may be smooth, with radius transitions.

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

6 cl, 4 dwg

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