A method of manufacturing a combined gas cylinder
A method of manufacturing a combined gas cylinder includes an overlay on a metal frame sealing layer of raw rubber mixture, the winding power over it a layer of fiberglass and simultaneous vulcanization of the rubber layer and the polymerization of the power shell. When this sealing layer is made from a rubber mixture based on butadiene-nitrile rubber containing a vulcanizing system of 2,5-bis(tert-butylperoxyisopropyl)benzene, triethylene glycol dimethacrylate and N,N'-metaphenylenediamine, in the following ratio, wt.h.: the NBR - 100; 2,5-bis(tert-butylperoxyisopropyl)benzene - 2,5-4,0; N,N'-metaphenylenediamine - 0,8-2,0; triethylene glycol dimethacrylate - 10-15; antioxidant - 0,5-3,0; zinc oxide - 3-5; stearic acid 1-3; carbon - 60-90. The use of the invention allows to provide a high integrity, strength, heat and frost resistance sealing layer. 2 Il., 3 table. The present invention relates to the manufacture of products made of composite materials, and more particularly to the manufacture of composite high-pressure cylinders for the storage, tra the petrochemical, the automotive industry and otherKnown vessels of the internal pressure and the methods for their manufacture of composite fibrous materials (CME), for example, the container of the CME, the body of which has two spherical (or near-spherical shape) metal bottom, ending with a hex fitting with internal thread. The inner and outer surfaces of the bottoms of obezyany, and rubber layers form a common monolithic mustache, rolling (pivokonservniy) in a cylindrical gas-tight rubber sheath. The outer surface of the rubber sheath is separated from the power composite-fiber wall Cabinet shell thin fluoropolymer film. Outer composition-fibrous power wall may be formed of layers of longitudinal-transverse, spiral-helix, combined orientation depending on the adopted method of molding or cash processing equipment (Tsyplakov Acting, Designing products made of composite fibrous materials. L., 1984, S. 134-136).Known vessel for storing a fluid substance under pressure with shatterproof breaking (French patent 2694066, 1994, IPC F 17 C 13/12, 1/04; R j IMS 71-03-95). The vessel has an internal wall in the VI. The Hoop of durable fibers coated with a thermoplastic or thermocatenulatus binder material, surrounds the inner wall and is on the ring at least one layer located on the circumference of the fibers and at least one layer of longitudinal fibers. The vessel is characterized by the fact that shell has at least one layer of fibers arranged directly or helix angle of winding from the angle of the longitudinal fibers 90o.The known high-pressure bladder for storage and transport of compressed gases, such as oxygen, under pressure (the international application 94/15140 PCT (WO), 1994, IPC F 17 C 1/16; R j IMS 71-09-95). The outer container contains a heavy-duty cylindrical shell made of composite material, the internal hermetic shell of the gas-tight plastic pipe with a metal flange located between the outer and inner shells. Annular flange on the inner surface has one or more annular grooves of trapezoidal cross-section, and the outer and inner surfaces of the rubber tire, fill trapezoidal grooves.Known gas cylinder, high pressure gas storage (patent of the USSR 1838714, IPC F 17 oppozicionnogo material, outer strength layer made from a polymer composite material, and the sealing layer, for example, rubber-based.Also known combined container for the storage and supply of liquid and gaseous environments of high pressure and its manufacturing process (patent 2094696 Russia, IPC F 17 C 1/00, 1/16, publ. 27.10.97) prototype. The container is a glass container containing an inner metal sheath, neckline, power shell made of composite material (fiberglass) having an inner sealing layer of rubber. A method of manufacturing a cylinder includes a winding on internal power shell (frame) of a composite material, with the inner shell, loose at the neck, put a rubber stopper, a layer of raw rubber and wound strength composite material. Then the referenced Assembly all together polimerizuet.In the above-mentioned analogues and the prototype of the invention specified material"rubber" and "rubber" only in General terms. However, not every rubber and not all tires can provide the necessary tightness (low permeability) sealing layer. Rubber sealing layer should have complex sup>2ATM), high strength mounting to fiberglass (not less than 6.0 MPa) and cohesive strength, heat and frost resistance (elongation at break at a temperature of -60oWith not less than 9%), resistance to explosive decompression in natural gas pressure of 25 MPa and speed of the discharge pressure of 1-2 ATM/minThe aim of the invention is to provide a method of manufacture of the container and the sealing rubber composition layer, to ensure high tightness (low permeability) of this layer and satisfies the above requirements.This objective is achieved in that in the method of manufacturing a combined gas cylinder containing fiberglass shell, a sealing rubber layer and an inner thin metal frame which includes applying to a metal frame sealing layer of raw rubber mixture, the winding power over it a layer of fiberglass and subsequent simultaneous polymerization fiberglass shell and vulcanization of the rubber layer, the sealing layer is made from a rubber mixture based on butadiene-nitrile rubber in the following ratio, wt.h.: BVA acid 1 - 3 carbon - 60 - 90 part curing system which comprises, by weight.h.: 2,5-Bis(tert-Butylperoxyisopropyl) benzene - 2,5 - 4,0 M,M'-metaphenylenediamine - 0,8 - 2,0
Dimethacrylate, triethylene glycol - 10 - 15
The invention is illustrated by consideration of the drawings and tables, where:
- Fig. 1 shows the design of the gas cylinder;
- Fig.2 - callout end of the gas cylinder;
- table.1 - technological, physical, mechanical, heat-resistant and adhesive characteristics of rubber sealing layer;
- table.2 - low temperature properties of rubber sealing layer;
- table.3 - the results of the test tank at the gas permeability.Gas cylinder contains an inner thin metal frame 1 in the form of a cylinder having end parts of the metal fittings 2 and 3, and the cylindrical part is punched hole (not shown). On the specified frame is applied in a thin (2-3 mm) sealing layer 4 of rubber compound of the above composition having properties shown in table. 1 and 2.Fittings 2 and 3 with the rubber layers 5 (Fig.2) made in advance separately, podstegivayut to the frame 1 by a pure metal. Pre-molded and wulkanizatornie uplotnitelnyy-21 as an anti-adhesive means. The sealing layer 4 placed on the metal frame 1 and the rubber elements 5 in two layers with a thickness of 1-1.5 mm each lap. On top of the sealing layer 4 is applied power shell 6 made of fiberglass. Fiberglass shell is applied by winding up to the specified size of the gas tank. After winding fiberglass produce simultaneous polymerization fiberglass shell 6 and the vulcanization of the rubber sealing layer 4.Samples of an experimental batch of gas cylinders with a capacity of 400 l, calculated on the working gas pressure of 25 MPa, and with a capacity of 350 l working pressure 20 MPa, were produced by the proposed method on the enterprise KOKB "Union" (, Kazan, Russia) with the use of rubber blend made in JSC NIICE (, St. Petersburg), and tested in KOKB "Union" (see tab.3).According to the results of tests of cylinders made of the proposed method were found to meet the requirements: the coefficient of permeability (0,01310-80,05310-8) cm3cm/cm2ATM does not exceed the allowed value 0,05710-8cm3cm/cm2the 50 kgf/cm2; sealing rubber layer has a high frost resistance (elongation at break at minus 60oWith is 10-25%) and high strength rubber with fiberglass (7,0-9,0 MPa). The cylinders are lightweight and suitable for long-term operation.
A method of manufacturing a combined gas cylinder containing the inner thin metal frame, the sealing rubber layer and the power envelope of composite material which includes applying to a metal frame sealing layer of raw rubber mixture, the winding power over it a layer of fiberglass and simultaneous vulcanization of the rubber layer and the polymerization of the power of the shell, characterized in that the sealing layer is made from a rubber mixture based on butadiene-nitrile rubber containing a vulcanizing system of 2,5-bis(tert-butylperoxyisopropyl)benzene, triethylene glycol dimethacrylate and N,N'-metaphenylenediamine, in the following ratio, wt.h.:
The NBR - 100
2,5-bis (tert-Butylperoxyisopropyl) benzene - 2,5 - 4,0
N,N'-Metaphenylenediamine - 0,8 - 2,0
Di is -
Carbon - 60 - 90l
FIELD: storing or distributing gases or liquids.
SUBSTANCE: pressure vessel has cylindrical shell made of spiral and ring layers which are made of a fiber composite material and bottoms with flanges made of spiral layers and set in openings. The thickness of the cylindrical shell uniformly decreases along the length in the direction to the bottom with greater opening due to the decrease of the thickness of the ring layers.
EFFECT: reduced weight and cost of vessels.
FIELD: mechanical engineering.
SUBSTANCE: vessel has plastic shell, flanges mounted in the pole openings in the shell, and lid set in one of the pole flanges. The lid is concave inward and bears on the inner side of the pole flange. The butt between the pole flange and lid is made to provide the radius of the circumference formed by intersection of the middle surface of the lid and surface of the bearing part of the flange to be larger than that of the pole opening in the plastic shell. The thickness of the pole flange should be at least 1.5-2 mm, which is sufficient for the formation of the plastic shell. The loading acts on the developed bearing surface of the lid which is mating to the inner surface of the pole flange.
EFFECT: decreased weight of vessel.
2 cl, 5 dwg
FIELD: automotive industry.
SUBSTANCE: high-pressure vessel comprises load-bearing shell made of a composition material, sealing shell, coaxial metallic connecting pipes with flanges embedded in the sealing shell, and nuts screwed on the connecting pipes. The sealing shell is made of two interconnected composition hemispherical molded shells. The method comprises winding composition layer on the preliminary prepared sealing shell and polymerizing the layer. The sealing shell is made of two half shells provided with openings for connecting pipes. Each shell is molded from the composition material with the use of punch and mold. The connecting pipes are glued. The half shells are interconnected. The outer load bearing shell is wound, and it is additionally secured to the connecting pipe through a nut.
EFFECT: enhanced permissible loading and decreased weight and cost.
4 cl, 1 dwg
FIELD: mechanical engineering industry; other industries; devices for production of the high pressure vessels by the method of coiling of the reinforcing materials.
SUBSTANCE: the invention is pertaining to production of the high pressure vessels by the method of coiling of the reinforcing material and may be used in mechanical engineering industry. The mandrel for manufacture of the high pressure vessels out of the composite materials contains the thin-wall sealing body with the holes. Inside the sealing body feed the binary mixture releasing in the process of the chemical reaction the gas creating the necessary internal pressure and ensuring the necessary rigidity of the sealing body in the process of the coiling and the composite material solidification. Usage of the invention will provide the reliable rigidity at the presence of the minimal polar holes in the sealing body and simplification of the process of manufacture of the high pressure vessels.
EFFECT: the invention ensures the reliable rigidity of the high pressure vessels at the presence of the minimal polar holes in the sealing body and simplification of the process of manufacture of the high pressure vessels.
FIELD: mechanical engineering.
SUBSTANCE: method comprises making inner sealing shell, outer load-bearing shell by winding the reinforcing threads on the inner shell and polymerizing the shell. Before making the inner sealing spherical shell, the connecting pipes are set in the mold for rotating molding, the grooves are made in the outer and inner surfaces, and ring projection is made on the inner surface from the side of the outlet opening of the connecting pipes. The inner sealing shell is then mounted for permitting rotation. The thread is wound on the shell by means of rotation of the shell, and before winding next layer each layer the angle between the axis of rotation of the shell and axis of rotation of the device for applying the thread changes by at least 2 degrees. The number of turns and thickness of next layer exceed these for the previous layer. The reinforcing threads are impregnated with a binder in vacuum. The binder is polymerized at a temperature lower than the temperature of softening of the material of the inner shell.
EFFECT: simplified method and enhanced strength of vessel.
2 cl, 1 dwg
FIELD: devices for storage and transportation of compressed gases under pressure, in particular, tanks for storage of oxygen, hydrogen, natural gas and other gases, may be used in different industrial branches, in transportation and other economic objects, where compressed, liquefied gas is used.
SUBSTANCE: composite high pressure tank contains external power cover made of composite material, produced by winding of circular and spiraling layers, and internal hermetic cover made of metal with welded in metallic flanged, mounted on opposite poles of the tank. Onto hermetic cover, firstly one circular layer of composite of low module reinforcing material is wound, then spiraling layers of high module material and final layers are made by circular winding of low module material.
EFFECT: minimized mass and manufacturing costs of the tank.
FIELD: high-pressure vessels.
SUBSTANCE: high-pressure housing comprises shell and elongated bottoms that are made by applying belts along the line of constant deviation.
EFFECT: enhanced strength and reliability.
2 cl, 4 dwg
SUBSTANCE: high-pressure cylinder is intended for keeping fluids and gases in motor vehicles using a gas fuel, as well as fluids and fire-extinguishing gases in stationary fire-extinguishing modules. The cylinder incorporates a seamless inner all-metal sealing enclosure (1) and out strengthening element (2) made up of two multi-layer coverings (3, 4). Composite material of coverings (3, 4) is made up proceeding from the following expression, i.e. δB1<δB2, E1<E2, where δB1 and δB2 are the first (inner) and the second (outer) coverings composite material breaking point, respectively, E1 and E2 are the first (inner) and the second (outer) coverings composite material coefficient of elasticity, respectively.
EFFECT: higher reliability, cyclic strength at a high destructive pressure, longer life, lower weight and smaller sizes.
6 cl, 1 dwg
FIELD: engineering industry.
SUBSTANCE: vessel manufacturing method includes winding of fibre material with a binder on an insulated enclosure, and polymerisation. On the middle part of insulated enclosure there wound and cured to some extent is some part of fibre material with a binder, after that the rest fibre material with a binder is wound and polymerisation is performed.
EFFECT: improving reliability of vessel manufacturing method.
3 cl, 1 dwg
SUBSTANCE: cylinder is comprised of an inner sealing metal liner with cylindrical ring and two semi-spherical or elliptical bottoms and external pressure shells. The above mentioned semi-spherical or elliptical bottoms are welded to the cylindrical ring by means of backing rings. The external pressure shell is made from composite material and implemented with continuously wounded strands or woven bands from composite material impregnated with binding compound. The strands or bands are wounded in two layers - helical and circular. The thickness of helical and circular layers is assumed no less than , where, δhel, δcir - thicknesses of helical and circular layers accordingly; δl - thickness of liner wall; El - liner material modulus of elasticity; Eth - modulus of elasticity of composite material along thread; Pmax - maximum operating pressure; R - mean radius of pressure shell on cylindrical part of liner; σyl - yield stress of liner material.
EFFECT: invention allows for extending cylinder serviceability period.