Steel container for gases and method of its manufacture
(57) Abstract:Use: treatment of metals by pressure. The inventive steel container has a body with a bottom and neck. In the body cavity of the established standard valves. On the transition area of the neck in the body has an internal flange at the bottom of the case - bearing shoulder. The size of the inner flange is determined by the dependencies. 2 S. p. f-crystals, 1 Il. The invention relates to the processing of metals by pressure, and in particular to methods of manufacturing steel cylinders of small and average capacity for gas pressures up to 20 MPa (200 kgf/cm2), as well as designs seamless steel cylinders of small and average capacity.Known methods of manufacture and design of steel cylinders (GOST 15860-85. The welded steel cylinders for liquefied petroleum gases at pressures up to 1.6 MPa) taken for the equivalent.In this way the upper and lower heads are made of cold or hot stamping. If hot stamping was carried out at a temperature below 700aboutWith, the bottoms are subjected to heat treatment to relieve internal stresses. The upper plate is welded ring cap with outside the CA) welded sleeve with internal tapered threads W 27,8 (GOST 9909-81) under the brass fitting. The bottom plate is welded to the Shoe. Then both welded to the bottom cowling on a specially made slip rings mounted inside the cylinder under the welding seam. All parts of the container are made of sheet carbon steel of various grades, installed GOST 380-71, GOST 16523-70, GOST 19903-74, GOST 19904-74, GOST 1050-74. Special tests during incoming inspection for compliance with the criteria of the mechanical characteristics (andtoare all materials. In addition, testing of all welds and acceptance testing of welded cylinders.The disadvantages of the known methods of manufacture of tanks (vessels) are: complexity and greater complexity of technological processes; the use of different materials; high consumption of ferrous and non-ferrous metals, electrodes, flux; the need to conduct multiple tests of metal, welded joints, and each cylinder individually, as well as works by highly experienced welder.There are also known methods of manufacture and design of seamless steel cylinders. Steel cylinders for low and medium capacity for gases at Pp-20 MPa (200 kgf/cmthe housing office with wall thinning and intermediate chemical and thermal operations. Then the obtained seamless cylinder heats the upper part and the rollers on the Cam is formed neck. The inner and outer surfaces of the neck have a parabolic shape with respect to an axis of symmetry of the vessel. On the inner surface of the neck is cut a tapered thread W 27,8 (GOST 9909-81), which is screwed to a brass fitting. On the outside of the neck top is put on and welded to the chassis specially made ring having a wall thickness not less than 3.5 mm and the outer cylindrical pipe thread G 2 (GOST 6357-81), which is further wrapped around the cap that protects the nozzle from damage during transport (the weight of the ring is 0.3 kg and cap to 1.8 kg). The fitting is screwed into the neck of the container on the lead minium (GOST 1951-73), lead litharge (GSAT 5539-73) diluted natural drying oil (GOST 7931-76).The tightness of the conical thread can be achieved by setting the outside diameter of the fitting under the flange copper sealing washers and tighten the fitting at the time of screwing (22040) N mIn the cavity of the fitting copper strip is placed, and on it is placed a copper membrane. After filling gas into the inside of the fitting is screwed on the cylindrical reshimu the bottom of the fitting.After extraction operations with thinning of the wall of the bottom container has a somewhat convex shape and the container is not installed securely in a vertical position. To provide vertical stability to the container GOST standard 949-73, regulates the installation of a special Shoe, are embracing a segment of steel pipe welded to the cylinder with a gap between the supporting surface of the Shoe and the bottom of the tank not less than 10 mmThe disadvantages of the known methods of manufacture of tanks and their construction are: the weakening of the casing seamless cylinder with two seats welding (welding ring with thread and Shoe); increased consumption of black (Shoe, ring, cap) and nonferrous (copper sealing washer and brass fitting) metals, the complexity and cost in the manufacture of the Shoe, ring, cap o-rings and fitting, consumption of red lead, varnish, electrodes, flux; heating the upper part of the body for clearance openings in the hot state; loosening the brass fitting having a conical thread does not allow its reuse, screwed the new fitting; not enough reliable sealing of tapered threads; the need to test each cylinder to hermetically the tsya improving the reliability and reducing the consumption of metal.This is achieved by the fact that on the transition area of the neck into the body of the container is made of the inner flange, and at the bottom of the case-bearing pile, while the profile of the internal cavity of the cap corresponds to the outer profile of the standard valves and associated with it, with copper sealing ring mounted on the inner flange, in addition, the size of the inner flange is determined by the dependencies:
Do=(0,14-0,16)D, where h is the thickness of the flange;
Dothe hole diameter of the neck at the site of the inner flange;
D is the outer diameter of the balloon.When performing the extrusion is formed on the bottom of the case supporting the clamp, and after the execution mnogovershinnoe crimping deforming elements in the form of Cams on the transition area of the neck into the body of the cylinder radial compression form the inner flange, and then perform the additional step of machining the inner flange of the cylinder in a vertical position on its lower part is attached and welded piece of steel pipe (Shoe).The design of the clamp on the bottom of the case during extrusion makes it unnecessary to use the shoes and welded, as by relying on the collar BA process, eliminates additional heating of the upper part of the seamless cylindrical body and forming the neck of the rollers. Local radial deformation of the metal Cams on the base of the neck in cold condition allows you to move the metal into the filler neck and to form the inner flange. In a further cavity of the mouth is treated in the size of the internal cavity of the brass fitting for the installation of standard valves, sealing the cavity of the cylinder pressing copper sealing ring to the inner flange of the neck. For reliable sealing width of the protruding part of the flange in the cavity after the bore must be at least (0,04.0,05)D, the diameter of the hole of the flange is made equal to (0,14.0,17).Outside of the neck is threaded, the groove and the stop corresponding to the outer dimensions of the fitting. This eliminates the use of brass fittings, copper sealing washers, red lead, natural drying oil. No fitting does not need the use of protective caps and welded rings to the housing. To prevent dirt and dust from getting into the cavity of the cap on the neck is worn nylon cap.The drawing shows the design offer owiny radial deformation of the metal Cams internal flange 3, after having bore diameter (0,14.0,17)D. the Distance H from the flange to the edge of the neck is the same size as the fitting on the ring band to the edge of the fitting. All dimensions of the internal cavity of the neck match the dimensions of the cavity of the fitting. The inner flange rests standard valves (copper sealing ring 4, the copper membrane 5, brass cracker 6 and brass clamping sleeve 7). Outside of the neck made the thread 8, the groove 8 and the stop 10, and the distance h from the stop to the edge of the neckline, as well as the dimensions of the grooves and thread fit, performed in fitting. Nylon cap 11 prevents the ingress of dirt and dust inside the neckline.Before filling the tank with gas in the neck of the installed valves. After filling a special key is inserted in the groove 12 of the retainer sleeve 7 and so, screw it, seal the cavity of the container. Sealing is achieved by the fact that copper sealing ring 4 when the tightening sleeve 7 is removed on the inner flange 3 and securely locks the cavity.If the width of the protruding part of the flange is greater (0,04.0,05)D, the shear ring is necessary to apply considerable force when tightening the nut. The fittings bottom vypolnenoe cylinder. Therefore, in the proposed structure after mechanical treatment of the neck and the flange at last leave the ring band width (0,04.0,05)D. Internal cavity of the cap has a diameter of 0.57 d, where d is the outer diameter of the neck, so the hole of the flange of the handle to the diameter of 0.14.0,17)D. the height of the Cams, which provide a radial-like metal for the formation of the inner flange, is chosen equal to (0,28.0,33)d. At smaller values in the deformation process is observed slice of metal. At larger sizes the height of the Cam increases the height of the neck.After the radial deformation of the inner flange has a bore diameter of 0.12 D barrel-shaped height (0,19.0,21)D. In the machining height of the flange is reduced to (0,12.0,14)D. When the size >0,14 D the height of the flange increases the height of the neck, since the depth of the cavity to the flange must be of size N. When the thickness of <0,12 D flange need to calculate shear flange from the inner gas pressure. The height of the flange (0,12. 0,14)D is the best.The design and implementation of the proposed method for the manufacture of cylinders for gases does not require large additional costs. Fashion and design can be used in inost design provides high quality seamless steel cylinders for gases. 1. Steel container for gases, comprising a housing with a bottom and neck, having a cavity, which is equipped with a standard stop valve, consisting of a copper sealing ring, copper membrane, brass cracker and brass clamping sleeve, characterized in that, in order to increase reliability and reduce consumption of metal, on the transition area of the neck into the body of the container is made of the inner flange, and at the bottom of the case supporting the clamp, while the profile of the internal cavity of the cap corresponds to the outer profile of the standard valves and associated with it, with copper sealing ring mounted on the inner flange, in addition, the size of the inner flange is determined by the dependencies
h (0,12 0,14)D
where h is the thickness of the flange;
D0the hole diameter of the neck at the site of the inner flange;
D is the outer diameter of the balloon.2. A method of manufacturing a steel container for gases, comprising operations of extrusion, mnogovershinnoe hood with wall reduction and mnogovershinnoe crimping, characterized in that, to reduce the consumption of metal and effort when performing the extrusion is formed on the bottom of the case of Aparecida neck into the body of the cylinder radial compression form an internal flange, then perform the additional step of machining the inner flange.
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
FIELD: plastic working of metals.
SUBSTANCE: method comprises steps of making shell, upper bottom, mouth, lower bottom and joining all parts by welding; forming lower bottom as one piece with backing flanged ring; inserting lower bottom into shell along backing ring until flange rests upon shell; butt welding shell and lower bottom on backing ring.
EFFECT: enhanced centering due to accurately inserting lower bottom to shell, improved quality of welded seam of lower bottom and shell, lowered labor consumption for making bottle.
1 dwg, 1 ex
FIELD: machine engineering, possibly manufacture of sealing envelopes of corrosion resistant steels of metal-plastic high-pressure bottles.
SUBSTANCE: method comprises steps of separately making metallic convex bottoms with cylindrical collar and backing ring. Thermal expansion factor of backing ring exceeds that of bottoms; outer diameter of backing ring provides close fit of bottoms onto it at 20°C; cooling preliminarily assembled backing ring with bottoms until cryogenic temperature; sliding bottoms on backing ring in cooled state until mutual touch of cylindrical collars of bottoms; heating assembly up to 20°C in order to provide close fit of backing ring in cylindrical collars of bottoms; welding bottoms along butt of assembly and then removing backing ring by chemical milling.
EFFECT: simplified process of making envelopes with enhanced mass characteristics.
2 cl, 4 dwg, 1 ex
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
FIELD: plastic metal working, namely shaping hollow variable cross section bodies.
SUBSTANCE: method comprises steps of shaping in die having opening for introducing hollow body and profiled inner surface corresponding to desired profile of hollow body; creating on inner surface of die temperature gradient increased in direction of hollow body motion from minimum temperature near inlet opening of die to maximum temperature in zone of least cross section of body; setting maximum temperature according to condition of largest yielding of body material; setting minimum temperature according to condition of keeping stability of body and heating body till said maximum temperature during its motion in die. In order to make metallic liner of metal-plastic high-pressure vessel from tube blank, ends of tube blank are squeezed in die with profiled inner surface. Tube blank is guided into die along its lengthwise axis. On inner surface of die temperature gradient is created in such a way that it increases in direction of blank motion along lengthwise axis of die from minimum temperature at inlet of die till maximum temperature in zone of least cross section of liner. Maximum temperature is set according to condition of largest yielding of tube blank material; minimum temperature is set according to condition of keeping stability of blank and heating blank till said maximum temperature during its motion in die. Apparatus for shaping hollow variable cross section body includes die mounted on stationary support and having inner surface of preset profile and also having inlet opening for feeding hollow body. Apparatus also includes slide made with possibility of mounting on it hollow body moving along lengthwise axis of die. Die is provided with heating unit for creating on inner surface of die temperature gradient increased along lengthwise axis of die from its inlet opening.
EFFECT: improved quality of articles due to prevention of stability loss.
16 cl, 2 ex, 6 dwg
FIELD: plastic metal working.
SUBSTANCE: method comprises setting the blank in the mandrel provided with the cylindrical and shaped sections, locking the blank in the cylindrical section of the mandrel, and affecting the blank by deforming rollers. The shaped section is initially formed by moving the rollers in different trajectories during one or several runs. Upon unlocking the cylindrical section, the blank is locked in the shaped section and the cylindrical section is drawn by moving the rollers in the opposite direction.
EFFECT: expanded function capabilities.
1 cl, 3 dwg, 2 tbl
FIELD: mechanical engineering; pressure vessels.
SUBSTANCE: according to proposed method, spheroidal bottom is made of sheet, thickness of 0.5-0.6 of designed thickness for initial elliptical bottom and is subjected to deformation at higher process upsetting pressure of 1.3-1.5 of designed value.
EFFECT: facilitated and reduced cost of manufacture.
2 cl, 1 dwg
FIELD: plastic metal working.
SUBSTANCE: invention can be used for making of bottles from sheet blanks. Proposed method includes making of shell, top plate, neck, bottom plate made integral with support ring, flanging and shoe, assembling and connecting the parts by welding. Shell is butt-welded to bottom plate on support ring. Both plates are made of blanks of equal size and in form of bottom plate. When making top plate, support part of shoe is calibrated to bring its diameter to diameter of shell.
EFFECT: reduced labor input.
1 ex, 1 dwg
FIELD: plastic working of metals, namely manufacture of high pressure vessels from recovered ammunition.
SUBSTANCE: method comprises steps of producing blanks, subjecting them to hot deformation, hot molding of vessel mouths, mechanically working vessel mouths; subjecting articles to heat treatment for providing desired strength of vessels; using as blanks bodies of recovered artillery fragmentation type or high-explosive shells with removed collar; cutting each shell in joining zone of its ogival and cylindrical parts for preparing two blanks, namely cone blank with through opening and sleeve like blank with bottom. Heat treatment is realized according to preset mode.
EFFECT: lowered cost, improved factor of metal usage due to using recovered bodies of artillery fragmentation type high-explosive shells, enhanced quality of using shell steels.
4 cl, 2 dwg, 2 ex, 5 tbl
FIELD: pressure vessels.
SUBSTANCE: plastic-coating metallic vessel comprises outer load-bearing plastic shell and inner thin-walled welded steel shell whose intermediate section is cylindrical, two bottoms, and connecting pipe. The connecting pipe and at least one of the bottoms are made in block. The method comprises rolling out the rod from its one end thus defining the flange having flat circular surface from one side, working the unrolled section of the rod to form the outer surface and inner passage of the connecting pipe, rotating tension of the flange, moulding the bottom of a given shape, connecting the bottom to the intermediate cylindrical section, and welding the parts.
EFFECT: reduced labor consumption.
4 cl, 3 dwg