RU2510476C1 - High-pressure cylinder made of metal composite - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: proposed cylinder consists of liner 1 and outer structural composite shell 2. Said liner comprises upper bottom 4 with longer neck 5, mid cylindrical part 5 and lower bottom 7 with element 8 intended for symmetric laying of helical layers in cylinder reinforcement. ID d₁ of longer neck 5 is increased to make at least half the ID d₂ of the liner mid cylindrical part 6. Element 8 intended for symmetric laying of helical layers in cylinder reinforcement is composed of neck with part-through bore 12, diametre d₃ of bore 12 being equal to ID d₁ of neck 5. Grooves 13 are made at the end of element 8, at its bottom part.

EFFECT: expanded operating performances, higher safety.

5 cl, 2 dwg

Description

The invention relates to general engineering, namely the production of metal composite high-pressure cylinders intended for use as consumable containers of waterjet cutting machines and having enlarged neck sizes for placement of the necessary equipment in the cylinder.

Known pressure vessel having a spherical shape and consisting of an aluminum liner with two thick-walled necks to accommodate valves or plugs (see US 2009/0200319 A1 (description of the invention with figure 1), IPC7 F17C 1/06, 08/13/2009) .

The known pressure vessel does not provide high reliability and safety, due to increased wear of the liner material under the influence of the waterjet mixture.

Known metal-composite cylinder for high-pressure hydrogen gas (option 1), containing an external power composite shell, consisting of annular and spiral layers, and a liner comprising an upper bottom with a neck, a lower bottom and a middle cylindrical part (see RU 99100 U1, IPC7 F17C 1/06, F17J 12/00, 11/10/2010).

The well-known metal composite cylinder has limited functionality, it cannot be used to place the necessary equipment in it because of the small size of the inner diameter of the neck and the wear of the aluminum liner due to contact with the waterjet mixture.

Closest to the proposed invention in terms of essential features is a metal composite cylinder for high pressure gaseous hydrogen (option 2), containing an external power composite shell consisting of annular and spiral layers, and a liner comprising an upper bottom with a neck, a lower bottom and a middle cylindrical part (see RU 99100 U1, IPC7 F17C 1/06, F17J 12/00, 11/10/2010).

This composite high-pressure cylinder has limited functionality, it cannot be used to place the necessary equipment in it because of the small size of the inner diameter of the neck and the wear of the aluminum liner due to contact with the waterjet mixture.

The objective of the invention is the creation of a metal composite high-pressure cylinder with a high level of safety, having a significant neck diameter for placement of the necessary equipment in the cylinder and a liner that is resistant to the effects of waterjet mixture.

The technical result when using the present invention is to expand the functionality of the container while providing an increased level of security.

The specified technical result is achieved in that in a metal composite high-pressure cylinder containing an external power composite shell, consisting of annular and spiral layers, and a liner, including an upper bottom with a neck, a lower bottom and a middle cylindrical part, the liner is equipped with an element to ensure symmetrical laying of spiral layers when reinforcing the cylinder located on the outer surface of the lower bottom, while the inner diameter of the neck of the upper bottom is at least half of the inner the average diameter of the cylindrical part of the liner, and the size of the external surfaces of the neck and upper bottom element to provide a symmetrical stacking spiral layers are for reinforcing the container.

In addition, the liner is made of stainless martensitic steel in a hardened and aged condition; an element for providing symmetrical laying of spiral layers when reinforcing a cylinder is made in the form of a neck with a through hole; grooves are made in the element to ensure symmetrical laying of the spiral layers when reinforcing the balloon in the lower part; the sectional shape of the inner surface of the liner in the vertical plane is a rectangle with rounded corners.

The invention is illustrated by drawings.

Figure 1 shows the liner of a metal composite high pressure cylinder, General view;

figure 2 shows a metal composite high-pressure cylinder with built-in equipment, a General view.

The metal composite high-pressure cylinder consists of a liner 1 and an external power composite shell 2, consisting of several spiral layers 3 and several ring layers (not shown in the drawing).

The liner 1 is made seamless and has an upper bottom 4 with an elongated neck 5, a middle cylindrical part 6 and a lower bottom 7 with an element 8 to ensure symmetrical laying of spiral layers when reinforcing the balloon, while the diameters d of the outer surfaces of the neck 5 of the upper bottom 4 and element 8 for ensure symmetrical laying of the spiral layers when reinforcing the balloon and the height h are equal, and the outer diameters d of the neck 5 of the upper bottom 4 and element 8 to ensure symmetrical laying of the spiral layers when reinforcing the cylinder with at least half the outer diameter of the middle cylindrical part 6 of liner 1, this makes it possible to lay symmetrical layers on both bottoms of the 4, 7 cylinders and thereby obtain equal bottoms of the cylinder and provide the specified strength (breaking pressure over 2000 bar) with a minimum liner thickness 1 made of stainless martensitic steel in a hardened and aged condition.

The execution of the liner 1 of stainless martensitic steel provides the required resistance of the cylinder in contact with the waterjet mixture. In addition, since the liner is made of stainless martensitic steel in a hardened and aged state, the likelihood of corrosion damage and wear of its surfaces under the influence of a moving waterjet suspension is reduced.

The inner diameter d _{1 of the} elongated neck 5 has an enlarged size equal to at least half the inner diameter d _{2 of the} middle cylindrical part 6 of the liner 1, which allows you to place the necessary equipment 9 and a plug 10 in it, sealing the liner cavity 1 through the gaskets 11.

Element 8 to ensure symmetrical laying of the spiral layers when reinforcing the balloon is made in the form of a neck with a through hole 12, and the diameter d _{3 of the} hole 12 is equal to the inner diameter d _{1 of the} neck 5, therefore, in geometric dimensions, element 8 is identical to the neck 5 of the upper bottom 4.

At the ends of the element 8 in the lower part, grooves 13 are made for attaching the liner 1 and bringing it into rotation on the winding machine during reinforcement (not shown in the drawing).

The cross-sectional shape of the inner surface of the liner 1 in the vertical plane is a rectangle with rounded corners, which allows to obtain a configuration of both bottoms 4, 7, which provides the required bearing load of the cylinder.

The external power composite shell 2 is made of bundles in the form of at least two annular layers for reinforcing the balloon in the annular direction and at least two spiral layers 3 for reinforcing the balloon in the axial direction.

The external power composite shell 2 was made using carbon fiber, which allowed to reduce the mass of cylinders by several times, to provide resistance to aggressive environments, fire and explosion safety and to guarantee shatterproof destruction.

The metal-composite high-pressure cylinder meets the modern requirements of Rostekhnadzor and the "Rules for the design and safe operation of pressure vessels" ПБ-03-576-03. A batch of cylinders was manufactured, cylinders passed strength, cyclic and leak tests.

Metal composite high-pressure cylinder is as follows.

In the metal composite cylinder of the cavity of the liner 1, a snap 9 and a plug 10 are installed.

The metal composite cylinder is filled with a waterjet suspension, supplying water through it 9, and the necessary working pressure is created in it, for example 700 atm, then the waterjet suspension is fed to the waterjet cutting machine. At the same time, the suspension in the cylinder under pressure acts on the bottoms and walls of the liner 1, made of stainless martensitic steel and made seamless, which makes it possible to obtain both bottoms of the cylinder with equal strength and ensure the specified strength when reinforcing the cylinder.

Claims (5)

1. A metal composite high-pressure cylinder containing an external power composite shell, consisting of annular and spiral layers, and a liner, including an upper bottom with a neck, a lower bottom and a middle cylindrical part, characterized in that the liner is equipped with an element for providing symmetrical laying of spiral layers at reinforcing the cylinder located on the outer surface of the lower bottom, while the inner diameter of the neck of the upper bottom is at least half the inner diameter of the middle cylindrical parts of the liner, and the size of the external surfaces of the neck and upper bottom element to provide a symmetrical stacking spiral layers are for reinforcing the container. 2. The metal composite cylinder according to claim 1, characterized in that the liner is made of stainless martensitic steel in a hardened and aged condition. 3. The metal composite cylinder according to claim 1, characterized in that the element for providing symmetrical laying of the spiral layers when reinforcing the cylinder is made in the form of a neck with a through hole. 4. The metal composite cylinder according to claim 1, characterized in that in the element to provide symmetrical laying of the spiral layers when reinforcing the cylinder, grooves are made in the lower part. 5. The metal composite cylinder according to claim 1, characterized in that the cross-sectional shape of the inner surface of the liner in the vertical plane is a rectangle with rounded corners.

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