The container for compressed gas

 

(57) Abstract:

The container is designed to store, transport and use of compressed gases. The tank is made of welded titanium alloy. The maximum radii of curvature of the outer surfaces of the bottom (Rdand neck (Rg), as well as the thickness of the bottom (dand neck (g) correlated with the radius of the outer surface of the cylinder (RC) and thickness (C) as follows: Rd/RC=1-1,5, Rg/RC=1-1,5,d/C= of 0.45 to 0.75,g/C= of 0.45 to 0.75. This increases the durability and reliability of the design cylinder. 1 Il.

The invention relates to the construction of vessels under high pressure, in particular for high-pressure cylinders designed for storage, transportation and use of compressed gases (air, argon, nitrogen and others ). Cylinders for compressed gases under high pressure are devices used in various fields of national economy and technology and, in particular, may find use in breathing apparatus and scuba gear.

The main requirements for such gas tanks are:

operational reliability when mini is compared to the environment and stored in gas cylinders;

- low power consumption.

Design of domestic cylinders is determined by the standard (for example, GOST standard 949-73 and others) and represents the pipe with rolled bottom and neck, and the bottom is sealed by welding. The thickness of the wall to the top of the bottom cap increases smoothly up to 3-4 wall thickness of the pipe.

Tanks of this design adopted for analogue produced, for example, Pervouralsk metallurgical plant.

However, existing designs of gas cylinders do not provide sufficient operational reliability (durability and long service life due to certain design features.

The least reliable element of the design of such cylinders (according to GOST standard 949-73) is the area of the sealing of the bottom by welding. The sealing area of the bottom of the weld is characterized by the presence of welding defects, subject to significant corrosion and reduces the service life of the cylinders.

Manufacturing technology standard cylinders does not allow to obtain the optimal shape and the ratio of the radii and thicknesses of the cylindrical part, the bottom and the neckline.

Optimum strength characteristics of the cylinders at their minimum ve the hemisphere, bottom and neck and the wall thickness of the bottom and the neckline, approximately one-half the wall thickness of the cylindrical part, which is not considered in the design of the cylinders and leads to reduction of operational reliability and increase weight characteristics.

Considering aluminum cylinders, also has been similar, patented in France (N2221685, 1974, b. N 46) and the UK (N 1419317, 1975) reported the same drawback, namely nonoptimality of the form cylinders and the ratio of the radii and thicknesses of the cylindrical body, the bottom and the neckline.

Common features offered by the authors of the cylinder is the presence of a cylindrical body with a bottom and a mouth.

The best design is the design of compressed gas cylinders firm "Faber", (Italy), adopted for the prototype (Grigoriev, U. and other Gas powered vehicles. -M.: Mashinostroenie, 1989, S. 100-102).

The container is a steel stamped from a sheet of a cylindrical body with a solid bottom and sakatani neck. The thickness of the cylinder walls and a solid bottom the same. In this design there is no effect sealing of the bottom by welding, but nevertheless not the optimal shape and the ratio of the thickness of the cylinder walls, bottom and neckline.

T is a cylinder with a high degree of operational reliability with minimum weight and increased the number of stored gas.

The invention consists in that the cylinder of compressed gas, having the form of a cylinder with a convex bottom and neck unlike the prototype is made of welded titanium alloy, and the maximum radii of curvature of the outer surfaces of the bottom Rdand the neckline Rgand the thickness of the bottomdand neckgcorrelated with the radius of the outer surface of the cylinder RCand thicknessCas follows:

Rd/RC=1...1,5,

Rg/RC=1...1,5,

d/C= 0,45 0,75...,

g/C= 0,45 0,75....

Welds can be treated from the inside flush with the surface of the cylinder.

The choice of thickness of the bottom of the neck relative to the cylindrical part within the specified limits, as well as the selection of the appropriate radii of the cylinder, the bottom and the neckline leads to practical ravnopravnosti cylinder, bottom and neckline, to reduce weight and material of the proposed tank.

Perform a cylinder made of titanium alloy makes it corrosion resistant in relation to the environment, even in sea water, and clean the part of the stored gas, which favors the use of cylinders as breathing apparatus the and Japan N1-26065, 1987, F 16 J 12/00.

Despite the popularity of using titanium as a corrosion-resistant material, use it in combination with the proposed selected ratios of the thicknesses and radii of the bottom cap and the cylindrical part of the cylinder is manufactured by welding, allowed to obtain a new technical result: balanceddesigns that affects the duration of use of the container under pressure, the increase in the number stored in the gas cylinder, the weight reduction in comparison with other designs of appropriate dimensions and reduced material design, as well as the ability to use for the storage of environmentally friendly gases.

If the violation is selected ratios suggested above, the technical result is not achieved.

The presence of the distinctive features of the prototype signs according to the criterion of novelty of the design of the proposed tank.

In support of the criterion of industrial applicability can be seen the design of the cylinder in the drawing, 1 is a cylindrical part, 2 - bottom, 3 - neck, Rd, RC, Rgthe radii of curvature of the outer surfaces of the bottom of the cylinder and cap, d,C,g- thickness CTE the intake connection) or 2 (stamped cylindrical part with a bottom and a cylindrical part of the neck).

According to the invention was developed the design documentation, which were prototypes of the cylinders with the proposed ratios.

Tests confirmed high strength, weight and performance characteristics of the cylinders.

As the test showed, in high-strength titanium cylinders increased 1.3 times the amount of stored gas in comparison with the prototype of similar size.

1. A cylinder of compressed gas, having the form of a cylinder with a convex bottom and a neck made of titanium alloy, characterized in that the container is made of welded, and the maximum radii of curvature of the outer surfaces of the bottom (Rdand neck (Rg), as well as the thickness of the bottom (dand neck (g) correlated with the radius of the outer surface of the cylinder (RC) and thickness (C) as follows: Rd/RC= 1 - 1,5, Rg/RC= 1 - 1,5,d/C= of 0.45 to 0.75,g/C= of 0.45 to 0.75.

2. The cylinder p. 1, characterized in that the welds are machined flush with the inside surface of the cylinder.

 

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