Plastic tank high pressure, a method of monitoring the health of plastic container and device for its implementation
Plastic tank high pressure consists of two bottom parts and located between the Central part. The factor of safety bottom parts exceeds the factor of safety the Central part on 4-15%. In the method of monitoring the health of the cylinder to measure the increment of the external diameter of the cylindrical part of the cylinder under the influence of internal pressure. The device control performance cylinder comprises a support, are designed to hold plastic container, and at least one displacement sensor. Displacement transducer mounted on a support with the ability to measure the increment of the external diameter of the cylindrical part of the metal cylinder. The use of the invention will improve the security of the container and to provide continuous monitoring of the technical condition of the outer plastic shell. 3 C. and 16 h.p. f-crystals, 5 Il. The invention relates to the field of gas appliances, and in particular to methods and devices for health monitoring composite high-pressure cylinders (VD), and can be used in the manufacturing process and operation of large metalloplastic points, gas stations etc). Primarily the invention relates to plastic cylinders, in which the outer plastic shell is the main load-bearing element of the body of the container and the metallic liner is sealed by the shell and has a thickness at which the material of the liner may be in the region of elastic-plastic deformation or close to it at normal working pressure.The vessels working under pressure, and including large metal cylinders VD large capacity, are objects of increased danger, the destruction of which in operation may lead to serious consequences, to cause great damage.Especially adverse consequences can be destruction, accompanied by the formation of fragments of the balloon.Currently, the basis for the design of plastic bottles lay the criterion of ravnopravnosti design (Neusberg C. L., idiot, A. Stability and optimization of composite membranes. Knowledge (Riga), 1988 , page 11). In accordance with this criterion, the factor of safety corps cylinder is made equal, not less than 2.6 in relation to the magnitude of the work is almost simultaneous destruction of both the cylindrical part of the cylinder, and it bottoms (EN, Testimony on PM 14065). However, studies have shown that disruption of the Central cylindrical part of the body of the container occurs mainly along its generatrix, and the formation of fragments exposed to the bottom part of the container.To prevent accidental damage control over the technical condition of plastic bottles. The choice of control methods is one of the essential objectives for safe operation of plastic bottles VD.According to the Rules of design and safe operation of vessels working under pressure (PB 10-115-96), approved by resolution of Gosgortekhnadzor of Russia from 18.04.95 N 20 (hereinafter the Rules), metal cylinders are subject to mandatory technical inspection every three years. Technical examination includes, in particular, external and internal inspection of the tank and hydraulic (pneumatic) tests. The task of external and internal inspection of the tank is to identify visible defects: cracks, dents, deviations from geometric shapes (circle, depressions, dents, etc.), laminations and breaks the plastic power of the shell.If satisfactory results of the external and strength of the plastic shell and the density of the metal liner of the container.However, the technical examination carried out in accordance with these Rules every three years, does not provide a warning of destruction of the plastic container in the operation period between examinations.In addition, technical examination is rather difficult for organizations operating metal cylinders of large dimensions. In accordance with these Rules, the examination can be performed only in specialized institutions, where the consumer must deliver the plastic container, and, in addition, requires the prior time-consuming preparation of cylinders (in particular, the removal of all removable devices cylinders, fill tank test fluid, drying and degreasing after testing and so on).A long period of time (every three years) between each technical examination, high labor costs, increased risk of exploitation of large cylinders and high operating pressures drive the need for continuous health monitoring of such cylinders in operation to prevent disaster is maloplastichnyj cylinders, providing continuous monitoring of leakage of the working medium during operation of the cylinder (EN 2117853 C1 ). To ensure such control between power shell and liner along a helical line along the longitudinal axis of the cylinder is made gazoprovody channel, separated from the power shell gas-tight layer. The channel is connected with the pressure sensor. Tightness of the metal liner in Gazoprovod channel increases the pressure of working medium, which is recorded by the pressure sensors connected to the alarm device.However, the known method of monitoring leakage of the working fluid for the patent RU 2117853 C1 allows you to control the tightness of the metal liner and does not provide as periodic technical inspection performed by the above Rules, identifying formed during operation of container defects and changes in physico-mechanical properties of the outer plastic shell that has a significant impact on the safe operation of plastic bottles, in which the outer plastic shell is the main bearing element and the metallic liner is sealed to the shell.The present invention postavlja health plastic container, including the assessment of the technical condition of the external plastic shell, while providing continuous monitoring of the technical condition of the external plastic casing during operation of the cylinder, and at the stage of its manufacture, in order to increase the safety of plastic bottles. The present invention is the creation of the control device for the implementation of the proposed method.The problem is solved in that in the composition of the high-pressure bladder containing two bottom and located between the Central part (mainly cylindrical), according to the invention the bottom of the tank is made with a greater factor of safety than the Central part.The increase in the strength characteristics of the bottom parts of the container in comparison with the cylindrical part guarantees the destruction of the body of plastic container only in its cylindrical part, which occurs along its generatrix and eliminates splinters.It is helpful to factor the strength of the shell of the container bottom parts exceeded the factor of safety of its Central part on a 4-15%.That is the main exceptions splintering when the destruction of the plastic container while maintaining the low density of the plastic material of the container.As mentioned above, the present invention mainly is implemented in a metal cylinder in which the wall thickness of the liner and the plastic shell is selected from the condition that the metal liner is sealed envelope with an operating pressure material of the liner may be in the region of elastic-plastic deformation, and the main bearing element of the body of the container is a plastic cover that mainly provides strength characteristics of the plastic container.When designing plastic container the factor of safety corps cylinder to the cylindrical part selects at least 2.6 (the Rules), and for bottoms - large on 4-15%, for example from 2.7 to 3.0.The problem is solved also by the fact that in the method of monitoring the health of plastic container, including the measurement of a given parameter, describing the technical condition of the container according to the invention the specified parameter is the increment of the external diameter of the cylindrical part of the plastic container under the influence of internal pressure.Measurement of outer diameter increment (the value of the cross extended is on the influence of internal pressure.It is known that plastic deformation of the shell depend on the total time during which the container is under the influence of excess pressure, and the magnitude of this pressure (load). During long-term operation and cyclic loading plastic container in a plastic shell accumulate damage, leading to a decrease in strength and increase the pliability of the plastic sheath at the same level of loading (internal pressure of the working environment).In addition, under sustained loading of the container in its plastic shell is also developing creep. For reinforced plastics creep rates after loading monotonically decreases for a very considerable time, are usually much larger than the lifetime of the product, although the creep curve is a monotonically increasing function. However, at the stage immediately preceding the destruction of the plastic shell, the rate of creep of the plastic shell begins to increase.As a result, when the same values of the internal pressure of the magnitude of the plastic deformation of the membrane during long-term operation, and especially before destruction, and grow.
Claims1. Plastic cylinder high-pressure containing two bottom portion and located between the Central part, whereas the eat, the factor of safety bottom parts exceeds the factor of safety the Central part on 4-15%.2. Plastic tank high pressure under item 1, characterized in that the body of the container is made from the condition that the factor of safety corps cylinder in the cylindrical Central part is 2.6 in relation to the value of the working pressure, and the bottom part is from 2.7 to 3.0.3. Method of monitoring the health of the plastic container by measuring a specified parameter describing the technical condition of the container, characterized in that said parameter is the increment of the external diameter of the cylindrical part of the plastic container under the influence of internal pressure.4. Method of monitoring the health of plastic container under item 3, characterized in that the increment of the external diameter of the cylindrical part of the container is measured at a loading cylinder for a given internal pressure and the measured value is compared with the corresponding specified internal pressure preset allowable increment value of the external diameter and the comparison result is judged on the performance of the balloon.5. Fashion designers in the process of a pneumatic and/or hydraulic testing of the container.6. Method of monitoring the health of plastic container under item 5, characterized in that the permissible value of the increment of the diameter of the cylinder are determined by calculation.7. Method of monitoring the health of a plastic container according to any one of paragraphs. 3-6, characterized in that the control produced during operation under cyclic loading of a container at each refueling.8. Method of monitoring the health of a plastic container according to any one of paragraphs. 3-6, characterized in that the control produced during operation under sustained loading plastic container.9. Method of monitoring the health of plastic container under item 7 or 8, characterized in that the circular and (or) long-term loading of the container at a given internal pressure is measured increment of the external diameter of the cylindrical part of the container and the measured value is compared with the corresponding specified internal pressure preset allowable increment value of the external diameter and the comparison result is judged on the performance of the balloon.10. Method of monitoring the health of plastic container under item 9, characterized in that the specified dopustimyh controlled container.11. Method of monitoring the health of a plastic container according to any one of paragraphs. 3-10, wherein the increment value of the external diameter of the cylindrical part of the container is measured for the maximum working pressure.12. Method of monitoring the health of a plastic container according to any one of paragraphs. 3-11, characterized in that when pressure testing will determine the scale of values of the increment of the external diameter of the cylindrical part of the container at the given values of the internal pressure, thus loading the pneumatic test or filling up the gas tank is performed with the consideration of the characteristics of the technical condition of the container, obtained from measurements at lower values of internal pressure in accordance with the scale.13. Method of monitoring the health of a plastic container according to any one of paragraphs. 3-12, characterized in that the excess of the measured values of the increment of the external diameter of the cylindrical part of the container specified value by more than 10% characterizes the loss of efficiency of the container.14. Method of monitoring the health of a plastic container according to any one of paragraphs. 3-13, characterized in that the increment of the external diameter of cylindri outside edge effect.15. Device health monitoring, composite container, comprising two bottom parts and the Central cylindrical part, where the device contains a sensor measuring a given parameter, describing the technical condition of the container, characterized in that it comprises a support configured to hold plastic container and at least one displacement transducer, mounted on a support with the ability to measure the increment of the external diameter of the cylindrical part of the plastic container.16. The device according to p. 15, wherein the bearing includes an extended base and mounted on the base for movement along its length, at least two of the fixing unit of plastic container, each of the fixing unit contains at least one displacement sensor.17. The device under item 15 or 16, characterized in that the nodes commit placed in the region of the cylindrical part of the plastic container.18. Device according to any one of paragraphs. 15-17, wherein the fixing unit includes a frame, covering the plastic container along the perimeter of the supplied set against each other, at least two of the frame.19. Device according to any one of paragraphs. 15-18, characterized in that the bearing is installed in the housing that serves as a protective case for a plastic bottle and is made with the possibility of placing and fixing it controlled plastic container, the body is equipped with a device to capture handling mechanism.
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.