Method of recovering high-pressure cylinders

 

(57) Abstract:

The invention relates to mechanical engineering and can be used in regenerative repair of acetylene cylinders, as well as the manufacture of acetylene cylinders and high-pressure cylinders other modifications and assignments. The method includes the segment at the bottom of the tank, emptying and cleaning of the internal cavity of the cylindrical and bottom parts, the Assembly of the cylindrical and bottom parts for welding and welding the annular seam in cross-section segments. Then on weld install reinforcing ring and weld it with a Shoe. The weight of recovered container is achieved by the fact that after cleaning the inner cavity wall of the cylindrical part of the container is subjected to reduction to the calculated thickness by mechanical processing or rotary hood with preservation of the thickened zone of initial thickness for welding with the bottom part. In addition it simplifies the technology and reduces the complexity of the repair. 1 C.p. f-crystals, 11 ill.

The present invention relates to mechanical engineering and can be used in regenerative repair of acetylene cylinders, as well as the manufacture of acetylene cylinders, Ballo is 73 steel Cylinders for small and medium volume for gases at Pp 20 MPa. "Technical specifications" for all kinds of gases are used unified seamless cylinders working pressure 10,15 and 20 MPa (100, 150 and 200 kg/cm2), which made monolithic without welding or with limited use of it only for welding pole deaf bottom of the container (see the Branch directory MISI USSR. "Pipe and dental products. Cylinders of small and medium sizes, M, 1985, S. 14 and 27).

Feature of high-pressure cylinders used for the storage, transportation and industrial use is the most widespread gas - acetylene is the fact that acetylene is among soluble, predominantly in acetone emissions. Acetylene cylinder is a metal shell filled with a porous filler and a solvent for acetylene - acetone, uniformly distributed in the pores of the porous filler. As the porous filler may be used in a wide range of porous materials. In domestic practice, used bulk porous mass of the coal BAU-1 and BAU-AC (JSC INTERGAS" and cast porous mass of CVL (JSC Uraltechgas"). Operating hydrostatic pressure (rrab) gas phase acetylene in the cylinder does not exceed 2.5 Mproving requirements on stock strength with respect to acetylene, unreasonably heavy and inconvenient in operation and, therefore, can be facilitated by reducing the wall thickness of the balloon.

The condition of the porous mass /see guidance document RD-05-3-89 "Methodical instructions on maintenance, inspection and operation of cylinders accounting BAU and cast mass CVL"/, the balloon may be rejected on a number of grounds, including shrinkage, compaction of the mass with decreasing beremote acetone, sintering and carbonization due to the decomposition of acetylene.

Repair acetylene cylinders by emptying and cleaning the internal cavity from the content of the porous mass is very costly and has limited application.

In domestic and foreign patent and technical literature there is no information on regenerative repair of acetylene cylinders.

As the closest prototype accepted method of recovering high-pressure cylinders (see C. I. Ermakov and other Repair and installation of chemical equipment", L., ed. In chemistry, 1981, S. 217-221), including the emptying of the tank, cleaning the inner surface, cut the bottom part, Assembly, welding and welding of the annular seam cylindrical and gonadostat prototype with respect to acetylene cylinders is the difficulty of emptying the tank and clean the inside from the contained mass.

The present invention is to devise efficient and economic recovery of acetylene cylinders with porous carbon mass BAU and BAU-AC and cast mass - CVL.

This technical result is achieved by the fact that the recovery of acetylene cylinders Shoe at the bottom emptying and cleaning of the internal cavity is carried out after cutting the bottom part, and as a reinforcing element using a reinforcing ring which is welded with the Shoe.

Another difference is that after cleaning the internal cavity of the cylindrical wall of the container is subjected to reduction to the calculated thickness by mechanical processing or rotary hood, with preservation of the thickened zone of initial thickness for welding with the bottom part.

Not known to the authors of the technical solutions provided in the claims signs aimed at achieving the same goal and claimed as the invention the object, so the proposed solution meets the criterion of "novelty".

The features distinguishing the claimed technical solution, not identified in other technical solutions and, therefore, obespecheniya drawings (Fig. 1-11), which shows the operational Process steps of the method of recovery of acetylene cylinders high pressure (in section):

Fig. 1. The container that is to be restored.

Fig. 2. The operation of the separation of the cutting cylinder.

Fig. 3. The bottom part of the container after emptying and cleaning.

Fig. 4. The cylindrical part of the container after emptying and cleaning the inside.

Fig. 5. Cylindrical part before welding.

Fig. 6. Welding the cylindrical and bottom parts of the container.

Fig. 7. Welding of reinforcing rings Shoe (restored tank).

Fig. 8. The thinning of the cylindrical part with the preservation of the thickened zone of initial thickness for welding.

Fig. 9. Thinned cylindrical part with a reinforcing ring.

Fig. 10. Welding thinned cylindrical and bottom parts of the container.

Fig. 11. Welding of reinforcing rings Shoe (restored lightweight tank).

The proposed method for the recovery of acetylene cylinders high pressure comprises a cylindrical housing 1 with the fitting in the neck, the Shoe 2 in the bottom part, the area dividing cut 3, the cylindrical part of the container 4, Donne the weld, remanufactured cylinder 8, restored lightweight cylinder 9 with a thinned cylindrical part.

For the implementation of the proposed method of recovery of high-pressure cylinders (Fig. 1), comprising a housing 1 with the fitting in the neck and the Shoe 2 in the bottom part of the body, produce a separating cut in zone 3, separating the body of the cylinder into 2 parts - the upper cylinder 4 with the fitting and the bottom 5 with the Shoe 2 (Fig. 3), then do the cleaning of the internal cavity of the parts 4 and 5 (Fig. 3 and 4) and on the cylindrical part of the install reinforcing ring 6 (Fig. 5), and then produce an Assembly for welding and welding of the cylindrical and bottom parts (Fig. 6), the weld bead pull reinforcing ring 6 and weld it with the Shoe 2 in the bottom part (Fig. 7) then finished the restored tank 8 is supplied to receiving the acceptance tests.

After repair of acetylene cylinders, the working pressure in which during operation do not exceed 1.8-2.5 MPa, with the aim of reducing the weight of the cylinders produce thinning of the cylindrical part of the cylinders to the calculated thickness by mechanical processing or rotary drawing (Fig. 8), and then the process repeats the above cycle - parku (Fig. 10), after which the weld bead pull reinforcing ring 6 and are welding it with a Shoe on the bottom and ready remanufactured cylinder 9 (Fig. 11) is subjected to foster acceptance tests.

The proposed method for recovery of high-pressure cylinders tested after repair steel acetylene cylinders with outer diameter of 219 mm with a volume of 40 l according to GOST standard 949-73 on the following technology.

Example 1.

Dividing cutting acetylene cylinder (Fig. 1), by segments in zone 3 bottom at a distance of 25 mm from the top end of the Shoe (Fig. 2);

emptying and cleaning the inside of the cylindrical cavity 4 and a bottom 5 parts of the container (Fig. 2, POS. 4; Fig. 3, POS. 5);

fabrication of reinforcing rings 6 of diameter D/d x L = 230/219 x 50 mm steel 20;

install reinforcing ring 6 on the outer surface of the cylindrical part 4 of the housing cylinder (Fig. 5, POS.6);

Assembly for welding and welding the casing of the cylinder (Fig. 6);

cleaning and x-ray the weld (Fig. 6);

install reinforcing ring 6 on the welded seam of the container (Fig. 7, POS.8);

girth welding of reinforcing rings 6 and Shoe 2 (Fig. 7);

hydraulic testing of the strength of the restored b segments in zone 3 bottom at a distance of 25 mm from the top end of the Shoe (Fig.2);

emptying and cleaning the inside of the cylindrical cavity 4 and a bottom 5 parts of the container (Fig. 2, POS.4; Fig. 3, POS.5);

the thinning of the wall of the cylinder part and cylinder to a thickness of 3.2-0,2mm (Fig. 8, POS.7);

fabrication of reinforcing rings 6 of diameter D/d x L - 230-219 x 50 mm steel 20;

install reinforcing ring 6 in thickness in the area for welding thinned cylindrical part 7 of the housing cylinder (Fig. 9);

Assembly for welding and welding the casing lightweight container (Fig. 10);

cleaning and x-ray the weld (Fig. 10);

girth welding of reinforcing rings 6 and Shoe 2 (Fig. 11, POS.9);

hydraulic testing of the strength of the restored lightweight container (Fig. 11, POS.9).

A pilot batch of recovered acetylene cylinders in quantities of 6 pieces tested at a pressure of 15.6 MPa (156 kg/cm2without destruction.

The proposed method for the recovery of acetylene cylinders in comparison with the prototype provides:

simplifying technology and reducing the complexity of repair acetylene cylinders:

ensuring compliance with requirements on reliability restored cylinders;

the weight of the cylinders and increase comfort echo effect and has the criterion of "positive effect".

The use of the present invention does not require additional re-equipment of enterprises. The first industrial testing will be conducted at JSC "INTERGAS" and JSC "Uraltechgas" in the second quarter of 2000

1. Method of recovering high-pressure cylinders, including emptying of the tank, cleaning the internal cavity, cut the bottom part, Assembly, welding and welding of the annular seam of the cylindrical and bottom parts, installation on weld reinforcing element and welded to the bottom part, characterized in that the recovery of acetylene cylinders Shoe at the bottom emptying and cleaning of the internal cavity is carried out after cutting the bottom part, and as a reinforcing element using a reinforcing ring which is welded with the Shoe.

2. The method according to p. 1, characterized in that after cleaning the internal cavity of the cylindrical wall of the container is subjected to reduction to the calculated thickness by mechanical processing or rotary hood with preservation of the thickened zone of initial thickness for welding with the bottom part.

 

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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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