CN113686924A - Composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process - Google Patents
Composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process Download PDFInfo
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- CN113686924A CN113686924A CN202110974381.3A CN202110974381A CN113686924A CN 113686924 A CN113686924 A CN 113686924A CN 202110974381 A CN202110974381 A CN 202110974381A CN 113686924 A CN113686924 A CN 113686924A
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 93
- 239000001257 hydrogen Substances 0.000 title claims abstract description 93
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 238000003860 storage Methods 0.000 title claims abstract description 90
- 239000002131 composite material Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000008569 process Effects 0.000 title claims abstract description 30
- 238000003745 diagnosis Methods 0.000 title claims abstract description 25
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 58
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 239000013307 optical fiber Substances 0.000 claims abstract description 17
- 239000000853 adhesive Substances 0.000 claims abstract description 3
- 230000001070 adhesive effect Effects 0.000 claims abstract description 3
- 229910000896 Manganin Inorganic materials 0.000 claims description 32
- 229910045601 alloy Inorganic materials 0.000 claims description 30
- 239000000956 alloy Substances 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 28
- 230000008859 change Effects 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 11
- 230000000007 visual effect Effects 0.000 claims description 11
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 9
- 239000004917 carbon fiber Substances 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 9
- 230000006870 function Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 5
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- 239000000835 fiber Substances 0.000 description 5
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000011094 fiberboard Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 3
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- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
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- 229920001903 high density polyethylene Polymers 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
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Abstract
The invention discloses a composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process, which fully considers the peeling failure mechanism of the high-pressure hydrogen storage bottle liner and provides a real-time detection scheme based on piezoresistive effect, and is mainly characterized in that: manganese-copper alloy wires are uniformly distributed on the inner container of the high-pressure composite material hydrogen storage bottle, the manganese-copper alloy wires are adhered to the inner container of the hydrogen storage bottle in an annular array mode through an adhesive, two ends of the manganese-copper alloy wires are connected with circuit interfaces on a bottle valve seat, and the portable resistance measuring instrument, the computer and the alarm are connected. The inner container peeling deformation condition is reflected by collecting the fluctuation of the resistance value of the manganese-copper alloy wire, the collapse failure position of the inner container can be accurately positioned through the fluctuation of the resistance value of the manganese-copper alloy wire with different serial numbers on the circumferential array, meanwhile, whether the detection result of the portable resistance measuring instrument is accurate or not is verified in an auxiliary mode by combining detection means such as a distributed optical fiber sensor and a portable CT scanner, and guidance can be provided for structural design and practical application of the inner container of the high-pressure hydrogen storage bottle.
Description
Technical Field
The invention relates to the technical field of special equipment detection, in particular to a composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process.
Background
A hydrogen Fuel Cell Vehicle (FCV) is a development trend of future vehicles due to its zero emission characteristic, and a hydrogen storage bottle for storing high-pressure hydrogen is one of essential key parts of fuel cell vehicles. At present, the vehicle-mounted high-pressure gaseous hydrogen storage cylinder mainly comprises an aluminum liner fiber-wound gas cylinder (type III) and a plastic liner fiber-wound gas cylinder (type IV), and the vehicle-mounted gas cylinder has the characteristics of limited volume and weight, special filling requirements, long service life, variable use environment and the like.
Compared with the type III hydrogen storage bottle, the type IV hydrogen storage bottle takes the polymer as the liner material, and is additionally provided with the carbon fiber composite material winding layer, so that the hydrogen storage bottle is lightened under the condition of meeting the requirement of the mechanical strength of the gas bottle. The liner of the IV-type carbon fiber fully-wound hydrogen storage bottle mainly plays a role in sealing hydrogen, and the carbon fiber composite material layer mainly plays a role in bearing pressure. The hydrogen atoms are the smallest atoms in the chemical element periodic table, hydrogen molecules easily penetrate through a shell material of the plastic inner container, stored high-pressure gas can permeate into an interface gap between the inner container and the composite material layer through the inner container and keep the same pressure with hydrogen in the inner container under the normal working condition, and when the gas cylinder is used for quickly reducing pressure, namely quickly deflating, if the local wall thickness of the inner container is defective or the mechanical rigidity is deficient and the like, the inner container can be unstable and begin to buckle due to the pressure difference between the inside and the outside. In the initial stage, the deformation is small, the change is slow, if the inner container is continuously under the working condition of rapid decompression, the deformation speed of the inner container is accelerated, so that the inner container and the composite material layer are peeled off, and finally collapse and failure occur, and the failure form is also one of important factors for preventing the popularization and the application of the IV-type hydrogen storage bottle. At present, the damage detection technology of the high-pressure hydrogen storage bottle mainly comprises macroscopic inspection, air tightness detection, nondestructive detection and the like. The detection technology can only be completed regularly, the real-time condition of the gas cylinder cannot be diagnosed, the detection cost is high, and the detection time is long. In addition, for the safety guarantee of the high-pressure hydrogen storage cylinder, the high safety factor input in the design process is mainly relied on at present, however, various uncertainties exist in the production and use processes of the gas cylinder, so that the design guarantee is incomplete. If the high-pressure composite hydrogen storage bottle can be combined with actual use working conditions, the real-time monitoring of the high-pressure composite hydrogen storage bottle is realized, the failure condition of the liner is diagnosed in real time, the failure condition of the liner is early warned in advance, the stripping and collapse accidents of the liner can be effectively avoided, and the use safety of the IV-type hydrogen storage bottle is improved.
The manganese copper is a precision resistance alloy, is usually supplied by wire rods, has wide application in various instruments, and is an ultrahigh pressure sensitive material with the upper limit of pressure measurement as high as 50 GPa. The manganese-copper alloy wire has good piezoresistive effect and can be widely applied to pressure measurement in high-temperature and high-pressure environments such as detonation, high-speed impact, dynamic fracture, new material synthesis and the like. The resistance change of the manganin is approximate to the linear function relation with the external pressure, namely the piezoresistive coefficient K is nearly constant, the temperature coefficient of the manganin alloy wire is small and hardly influenced by temperature, and the pressure measurement under dynamic high pressure can be converted into the measurement of the manganin resistance change by a sensor made of the manganin as a sensitive element.
The manganese-copper alloy wire can be uniformly adhered to the surface of the inner container barrel by utilizing the piezoresistive effect of the manganese-copper alloy wire and the characteristic of small resistance temperature coefficient, the pressure on the manganese-copper alloy wire can be changed when the inner container is stripped and deformed, so that the resistance value of the manganese-copper alloy wire fluctuates, the resistance value of the manganese-copper alloy wire is collected by a portable resistance measuring instrument in real time, the deformation condition of the inner container structure is diagnosed by analyzing the fluctuation of an electric signal by utilizing a computer, and the electric signal is used as an alarm signal to finish early warning through data processing.
Various existing high-pressure container damage detection technologies are provided, wherein patent CN201911042584.8 discloses an early warning detection method for stress overload of a high-pressure composite material gas cylinder, a unidirectional fiber board is used for replacing a strain gauge, the safety condition of the gas cylinder is judged by directly observing the damage degree of fibers in the unidirectional fiber board, the stress overload of the gas cylinder can be directly warned, but the manufacture of the unidirectional fiber board at the early stage is complicated, and different positions of the gas cylinder need to be screened and matched with fiber boards with different limit strain values, so that the detection difficulty is increased; patent CN201810026266.1 mentions a device and method for monitoring hydraulic bursting of a composite material gas cylinder based on acoustic emission technology, which can obtain the variation trend of acoustic emission amplitude and energy signal parameters along with pressure in the bursting process of the composite material gas cylinder, can analyze the variation conditions of fiber fracture and matrix fracture distinguished by acoustic emission signal frequency under different pressures, but is not suitable for online detection under the working condition of the gas cylinder; patent CN201810253167.7 mentions a nondestructive testing system for pressure vessel based on X-ray imaging, which uses X-ray visual imaging technology to detect whether there is a defect in the component, and is suitable for the factory testing of hydrogen storage bottle, but cannot realize the early warning function of the working process of hydrogen storage bottle; patent 202010666110.7 mainly relates to a mechanical device for mounting a detection head, which reduces the detection error of manual holding, but can not realize the on-line detection function; patent 202011072101.1 mentions an explosion-proof detection device for pressure vessel detection, which improves the safety of detection, but cannot realize the real-time early warning function.
Disclosure of Invention
The invention provides a composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process by taking a high-pressure hydrogen storage bottle as a research object, which is used for monitoring and early warning liner collapse of the high-pressure hydrogen storage bottle caused by gas permeation in real time. If the collapse and deformation of the inner container are controllable in the initial stage, the service life of the inner container can be prolonged by adjusting the safety working condition of the inflation and deflation of the hydrogen storage bottle in time, such as measures of reducing the inflation speed and the like, so that the purpose of reducing the scrapping rate of the hydrogen storage bottle is realized; if the collapse deformation of the inner container is uncontrollable in the initial stage and the collapse deformation process is continuously intensified, the hydrogen storage bottle is immediately forced to be scrapped, so that accidents caused by collapse failure of the inner container in the later stage are avoided, and reliable guarantee is provided for large-scale application of vehicle-mounted and storage and transportation high-pressure hydrogen storage bottles and the use safety aspect.
The invention relates to a composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process, which is mainly characterized in that: manganese-copper alloy wires are uniformly distributed on an inner container of the high-pressure composite material hydrogen storage bottle and are adhered to the inner container of the hydrogen storage bottle in an annular array mode through adhesives, a carbon fiber layer is uniformly wound on the inner container on which the manganese-copper alloy wires in the annular array mode are distributed, two ends of each manganese-copper alloy wire are connected with a circuit interface on a bottle valve seat, the other end of each circuit interface is connected with a portable resistance measuring instrument, the portable resistance measuring instrument is connected with a computer and an alarm, and a complete detection and early warning circuit loop is formed.
The portable resistance measuring instrument is mainly used for monitoring the resistance change on the manganese-copper alloy wire, the computer is mainly used for data acquisition, storage, analysis and processing, and the alarm is mainly used for early warning when the inner container collapses.
The manganese-copper alloy wire is mainly used for diagnosing the degree of stripping deformation of the inner container according to the fluctuation range of the resistance value of the manganese-copper alloy wire, and the fluctuation threshold value of the resistance can be set as an early warning signal for early warning through data processing, so that the purposes of protecting the inner container from collapse deformation and avoiding serious hydrogen storage accidents are achieved. The real-time resistance value of the manganin alloy wire rod which is adhered to the inner container in the annular array mode is collected through the portable resistance measuring instrument, the collected data are transmitted to the computer to be stored and analyzed, the resistance values of the manganin alloy wire rods with different numbers are stored through the computer, and the fluctuation conditions of the resistance values of the manganin alloy wire rods with different numbers are analyzed.
The different-numbered manganin alloy wires are formed by numbering annular manganin alloy wires in a segmented mode, namely each segment of annular manganin alloy wire corresponds to one resistance value on the portable resistance measuring instrument, the annular manganin alloy wires can be divided into four segments, eight segments, twelve segments and the like in an arrangement and combination mode, then each segment of manganin alloy wire is numbered, each segment of manganin alloy wire corresponds to one resistance value in the portable resistance measuring instrument, and the purpose of segmented numbering is to accurately position the specific position of collapse failure of the inner container.
The portable resistance measuring instrument starts to work from pressure relief of the gas cylinder, has the function of dynamically acquiring the real-time resistance value of the manganese-copper alloy wire rod which is pasted on the surface of the liner in an annular array mode, can be detached when pressure relief is completed, can be repeatedly used, and does not influence the normal work of the gas cylinder.
The computer for data storage and analysis processing is provided with a visual interface, the structure of the gas cylinder liner is demonstrated through simulation, the position of each group of serial resistance values at a certain time is visualized, algorithm analysis processing is carried out on the real-time resistance value of the manganese-copper alloy wire, the controllable threshold value of data can be automatically adjusted according to the collapse degree of the liner, the threshold value is used as an early warning signal, on one hand, light early warning of a mark point can be carried out through the visual interface of the computer, the specific position of failure of the gas cylinder liner can be accurately positioned, reference is provided for optimization of the later-stage liner structure, and when the controllable threshold value is exceeded, the early warning signal can be transmitted to the alarm for early warning.
Preferably, the early warning system can be combined with a computer data memory function, when the resistance value of the manganese-copper alloy wire exceeds a certain proportion and reaches a controllable threshold value, the time can be reserved for carrying out safe working condition response, and the resistance value change is observed, so that the failure mode is controlled to be more and more advanced.
Preferably, the manganese-copper alloy wire can be directly embedded into the liner in the production process of the liner of the composite material high-pressure hydrogen storage bottle, when the liner collapses, the manganese-copper alloy wire embedded into the liner deforms along with the liner, when the deformation reaches a certain degree, the resistance value of the manganese-copper alloy wire reaches an early warning threshold value, more accurate early warning can be realized, follow-up bonding on the surface of the liner is not needed, and carbon fiber winding of the liner in the later period is not influenced.
Preferably, the composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process can not only adopt manganese-copper alloy wires based on piezoresistive effect to detect liner collapse failure conditions, but also combine other detection means, such as a distributed optical fiber sensor. The distributed optical fiber sensor takes optical signals as a carrier, and the fiber core material of the distributed optical fiber sensor is silicon dioxide, so that the distributed optical fiber sensor has the advantages of high temperature resistance, corrosion resistance and the like, and is small in size, light in weight and convenient to lay and arrange; the distributed optical fiber sensor can accurately measure information such as strain, temperature, vibration, damage and the like at any point along the optical fiber, a loop does not need to be formed, and the line structure is simplified. The optical fiber is laid on the inner wall surface of the inner container of the hydrogen storage bottle in a circumferential pasting mode to form a detection net, the upward strain distribution condition of the inner container of the high-pressure hydrogen storage bottle is measured, the strain distribution data is transmitted to a computer, a visual strain distribution cloud chart of the inner container structure of the hydrogen storage bottle is established, the damage position and degree of the inner container structure of the hydrogen storage bottle can be observed visually, and therefore the stripping failure condition of the inner container of the high-pressure hydrogen storage bottle is verified in an auxiliary mode.
Preferably, the composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process can not only adopt manganese-copper alloy wires based on piezoresistive effect to detect liner collapse failure conditions, but also can be combined with other detection means to assist in verifying detection structures, such as a portable CT scanner to assist in checking and verifying whether the detection result of the portable resistance measuring instrument is accurate and whether liner collapse positions are consistent.
Alternatively, the manganese-copper alloy wire rod can be replaced by other wire rods with similar properties or functions, and the condition that the resistance change and the external pressure are approximately in a linear function relationship only needs to be met, namely the piezoresistive coefficient K is approximately constant, the resistance temperature coefficient is small, and the influence of temperature is hardly caused.
According to the diagnosis and early warning process for the peeling failure of the inner container of the composite material high-pressure hydrogen storage bottle, the peeling failure mechanism of the inner container of the high-pressure hydrogen storage bottle is fully considered, the peeling deformation condition of the inner container is reflected through the fluctuation of the resistance value of the manganese-copper alloy wire rod, the collapse failure position of the inner container can be accurately positioned through the fluctuation of the resistance values of the manganese-copper alloy wire rods with different numbers on the circumferential array, and a reliable basis is provided for the follow-up research of the peeling failure mechanism of the inner container of the high-pressure composite material hydrogen storage bottle. Meanwhile, the deformation condition of the inner container of the gas cylinder can be visually seen through a visual interface of a computer, technicians can conveniently observe and record, real-time data are clear, whether the detection result of the portable resistance measuring instrument is accurate or not is assisted and verified by combining other detection means such as a portable CT scanner, and guidance can be provided for structural design and practical application of the inner container of the high-pressure hydrogen storage cylinder.
Drawings
FIG. 1 is a schematic view of a device for diagnosing and warning the peeling failure of an inner container of a composite material high-pressure hydrogen storage bottle according to the invention;
FIG. 2 is a schematic diagram of an arrangement mode of manganese-copper alloy wires on the liner of the composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process;
FIG. 3 is a schematic view of the liner radial peeling collapse of the composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process of the invention;
FIG. 4 is a diagram of a layout of distributed optical fibers on the liner of a composite high-pressure hydrogen storage bottle according to the composite high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process of the invention;
FIG. 5 is a flow chart of the composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process of the invention;
in the figure: 1-inner container; 2-manganese copper alloy wire; 3-a carbon fiber winding layer; 4-bottle valve seat; 5-a circuit interface; 6-portable resistance measuring instrument; 7-a computer; 8-an alarm; 9-distributed fiber optic sensors; 10-light pulse emitting device.
Detailed Description
As shown in figure 1, the diagnosis and early warning process for the peeling failure of the inner container of the composite material high-pressure hydrogen storage bottle is mainly characterized in that: manganese-copper alloy wires 2 are uniformly distributed in the inner container 1 of the high-pressure composite hydrogen storage bottle in the circumferential direction, the manganese-copper alloy wires 2 are directly embedded in the inner container 1 in the production process of the inner container 1 of the high-pressure composite hydrogen storage bottle, carbon fiber winding layers 3 are uniformly wound on the inner container 1 on which the manganese-copper alloy wires 2 are distributed in the circumferential direction, two ends of each manganese-copper alloy wire 2 are connected with a circuit interface 5 on a bottle valve seat 4, the other end of each circuit interface 5 is connected with a portable resistance measuring instrument 6, and the portable resistance measuring instrument 6 is connected with a computer 7 and an alarm 8 to form a complete detection and early warning circuit loop.
The portable resistance measuring instrument 6 is mainly used for monitoring the resistance change on the manganese-copper alloy wire 2, the computer 7 is mainly used for data acquisition, storage, analysis and processing, and the alarm 8 is mainly used for early warning when the inner container 1 collapses.
As shown in fig. 2, the manganin alloy wire 2 is directly embedded into the material of the liner 1 in the production process of the liner 1 of the composite material high-pressure hydrogen storage bottle, when the liner 1 collapses, the manganin alloy wire embedded into the material of the liner 1 deforms along with the liner 1, so that the resistance value of the manganin alloy wire fluctuates, the section of the deformation condition of the manganin alloy wire 2 along with the peeling and collapse of the liner 1 is shown in fig. 3, the peeling and deformation degree of the liner 1 is mainly diagnosed according to the fluctuation range of the resistance value, and through data processing, a resistance fluctuation threshold value can be set as an early warning signal for early warning, so that the liner 1 is protected from collapsing and deforming, and the major hydrogen storage accidents are avoided. The real-time resistance value of the manganin alloy wire 2 which is adhered to the inner container 1 in an annular array mode is collected through the portable resistance measuring instrument 6, the collected data are transmitted to the computer 7 to be stored and analyzed, the resistance value of the manganin alloy wire 2 with different numbers is stored through the computer 7, and the fluctuation situation of the resistance value of the manganin alloy wire 2 with different numbers is analyzed.
Different serial numbers manganin alloy wire 2 is to carry out the segmentation serial number to cyclic annular manganin alloy wire 2, and every section is to manganin alloy wire 2 and is corresponding to a resistance value on the portable resistance measurement appearance 6 promptly, and cyclic annular manganin alloy wire 2 can be divided into permutation and combination such as four sections, eight sections, twelve sections again, and then numbers every section manganin alloy wire 2, and every section manganin alloy wire 2 is corresponding to a resistance value in the portable resistance measurement appearance 6, and the purpose of segmentation serial number is for accurate location inner bag 1 takes place to collapse the concrete position that became invalid.
Portable resistance measurement appearance 6 from the gas cylinder pressure release begin work, the effect is that the dynamic acquisition hoop array pastes the real-time resistance value of the manganese copper alloy wire 2 on inner bag 1 surface, accomplishes when the pressure release, can dismantle, can relapse repetitious usage, does not influence the gas cylinder and normally works.
The computer 7 for data storage and analysis processing is provided with a visual interface, the structure of the inner container 1 of the gas cylinder is demonstrated through simulation, the position of each group of serial number resistance values at a certain moment is visualized, algorithm analysis processing is carried out on the real-time resistance value of the manganese-copper alloy wire 2, the controllable threshold of data can be automatically adjusted according to the collapse degree of the inner container 1, the threshold is used as an early warning signal, on one hand, light early warning of a mark point can be carried out through the visual interface of the computer 7, the specific position of failure of the inner container 1 of the gas cylinder can be accurately positioned, reference is provided for optimization of the structure of the inner container 1 in the later period, in addition, the data memory function of the computer 7 can be combined, when the resistance value of the manganese-copper alloy wire 2 exceeds a certain proportion to reach the controllable threshold, the time can be reserved for safe working condition response, the resistance change is observed, and the failure mode is controlled to be developed more and more fiercely. On the other hand, when the alarm exceeds the controllable threshold, the early warning signal can be transmitted to the alarm 8 to carry out early warning. In addition, an auxiliary verification detection structure can be added, such as a portable CT scanner, for auxiliary inspection, to verify whether the detection result of the portable resistance measuring instrument 6 is accurate and whether the collapse positions of the liner 1 are consistent.
The composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process can detect and find liner collapse of the high-pressure hydrogen storage bottle caused by hydrogen permeation in time. The specific work flow diagram is shown in fig. 5, and early warning is started at the initial stage of collapse and deformation of the inner container caused by hydrogen permeation. If the collapse and deformation of the inner container are controllable in the initial stage, the service life of the inner container can be prolonged by adjusting the safety working condition of the inflation and deflation of the hydrogen storage bottle in time, such as measures of reducing the inflation speed and the like, so that the purpose of reducing the scrapping rate of the hydrogen storage bottle is realized; if the collapse deformation of the inner container is uncontrollable in the initial stage and the collapse deformation process is continuously intensified, the hydrogen storage cylinder is immediately forced to be scrapped, so that accidents caused by collapse failure of the inner container in the later stage are avoided, and reliable guarantee is provided for large-scale application of vehicle-mounted and storage and transportation high-pressure hydrogen storage cylinders in the aspect of use safety.
Preferably, the early warning system can be combined with the data memory function of the computer 7, when the resistance value of the manganese-copper alloy wire 2 exceeds a certain proportion and reaches a controllable threshold value, the time can be reserved for carrying out safe working condition response, and the resistance value change is observed, so that the failure mode is controlled to be more and more advanced.
Preferably, the manganese-copper alloy wire 2 can be directly embedded into the inner container 1 in the production process of the composite material high-pressure hydrogen storage cylinder inner container 1, when the inner container 1 collapses, the manganese-copper alloy wire embedded into the inner container 1 deforms along with the inner container 1, when the deformation reaches a certain degree, the resistance value of the manganese-copper alloy wire 2 reaches an early warning threshold value, more accurate early warning can be realized, follow-up bonding on the surface of the inner container 1 is not needed, and the winding of the carbon fiber winding layer 3 of the inner container 1 in the later period is not influenced.
Preferably, as shown in fig. 4, the diagnosis and early warning process for the peeling failure of the liner 1 of the composite material high-pressure hydrogen storage bottle can not only adopt the manganese-copper alloy wire 2 based on piezoresistive effect to detect the collapse failure condition of the liner 1, but also combine with other detection means, such as a distributed optical fiber sensor 9. The distributed optical fiber sensor 9 takes optical signals as a carrier, and the fiber core material of the distributed optical fiber sensor is silicon dioxide, so that the distributed optical fiber sensor has the advantages of high temperature resistance, corrosion resistance and the like, and is small in size, light in weight and convenient to lay and arrange; the distributed optical fiber sensor 9 can accurately measure information such as strain, temperature, vibration, damage and the like at any point along the optical fiber, a loop does not need to be formed, and the line structure is simplified. Optical fibers are laid on the inner wall surface of the inner container 1 of the hydrogen storage bottle in a circumferential pasting mode to form a detection net, a light pulse transmitting device 10 transmits signals to measure the circumferential strain distribution condition of the inner container 1 of the high-pressure hydrogen storage bottle, the strain distribution data are transmitted to a computer 7 through a data acquisition and light pulse transmitting device 10, a visual strain distribution cloud chart of the structure of the inner container 1 of the hydrogen storage bottle is established, the damage position and degree of the structure of the inner container 1 of the hydrogen storage bottle can be observed visually, and the peeling failure condition of the inner container 1 of the high-pressure hydrogen storage bottle is verified in an auxiliary mode.
Preferably, the composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process can not only adopt the manganese-copper alloy wire 2 based on piezoresistive effect to detect the collapse failure condition of the liner 1, but also can be combined with other detection means to assist in verifying the detection structure, such as combining a portable CT scanner to assist in checking and verifying whether the detection result of the portable resistance measuring instrument 6 is accurate and whether the collapse positions of the liner 1 are consistent.
Alternatively, the manganese-copper alloy wire 2 can be replaced by other wires with similar properties or functions, and only the condition that the resistance change and the external pressure are approximately in a linear function relationship, namely the piezoresistive coefficient K is approximately constant, the resistance temperature coefficient is small, and the influence of temperature is hardly caused is met.
Claims (8)
1. A composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process is characterized in that: manganese-copper alloy wires are uniformly distributed on an inner container of a high-pressure composite material hydrogen storage bottle, the manganese-copper alloy wires are adhered to the inner container of the hydrogen storage bottle in an annular array mode through an adhesive, a carbon fiber layer is uniformly wound on the inner container, the manganese-copper alloy wires are distributed in the annular array mode, two ends of each manganese-copper alloy wire are connected with a circuit interface on a bottle valve seat, the other end of each circuit interface is connected with a portable resistance measuring instrument, real-time resistance values of the manganese-copper alloy wires adhered to the inner container in the annular array mode are collected through the portable resistance measuring instrument, collected data are transmitted to a computer to be stored and analyzed, resistance values of the manganese-copper alloy wires with different numbers are stored through the computer, and the fluctuation conditions of the resistance values of the manganese-copper alloy wires with different numbers are analyzed.
2. The composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process according to claim 1, which is characterized in that: the different serial numbers of manganin alloy wire rods are to carry out sectional serial numbers on the annular manganin alloy wire rods, each section of annular manganin alloy wire rod corresponds to a resistance value on the portable resistance measuring instrument, the annular manganin alloy wire rods are divided into four sections, eight sections or twelve sections, and then each section of manganin alloy wire rod is numbered, each section of manganin alloy wire rod corresponds to a resistance value in the portable resistance measuring instrument, and the liner is accurately positioned to collapse and fail at a specific position.
3. The composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process according to claim 1, which is characterized in that: the portable resistance measuring instrument starts to work from pressure relief of the gas cylinder, dynamically acquires the real-time resistance value of the manganese-copper alloy wire rod which is adhered to the surface of the inner container in an annular array mode, and can be detached after pressure relief is completed and used repeatedly.
4. The composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process according to claim 1, which is characterized in that: the computer for data storage and analysis processing is provided with a visual interface, the structure of the gas cylinder liner is demonstrated through simulation, the position of each group of serial resistance values at a certain time is visualized, algorithm analysis processing is carried out on the real-time resistance value of the manganese-copper alloy wire, the controllable threshold value of data can be automatically adjusted according to the collapse degree of the liner, the threshold value is used as an early warning signal, light early warning of a mark point is carried out through the visual interface of the computer, the specific position of failure of the gas cylinder liner can be accurately positioned, reference is provided for optimization of the later-stage liner structure, or when the resistance value exceeds the controllable threshold value, the early warning signal is transmitted to the alarm to carry out early warning.
5. The composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process according to claim 1, which is characterized in that: the manganese-copper alloy wire is directly embedded into the inner container in the production process of the inner container of the composite material high-pressure hydrogen storage cylinder, when the inner container collapses, the manganese-copper alloy wire embedded into the inner container deforms along with the inner container, and when the deformation reaches a certain degree, the resistance value of the manganese-copper alloy wire reaches an early warning threshold value, and accurate early warning is performed.
6. The composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process according to claim 1, which is characterized in that: laying optical fibers on the inner wall surface of the inner container of the hydrogen storage bottle in a circumferential pasting mode to form a detection net, measuring the upward strain distribution condition of the inner container of the high-pressure hydrogen storage bottle, transmitting the strain distribution data to a computer, establishing a visual strain distribution cloud chart of the inner container structure of the hydrogen storage bottle, visually observing the damage position and degree of the inner container structure of the hydrogen storage bottle, and assisting in verifying the peeling failure condition of the inner container of the high-pressure hydrogen storage bottle.
7. The composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process according to claim 1, which is characterized in that: and the portable CT scanner is combined to assist the examination.
8. The composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process according to claim 1, which is characterized in that: the manganese-copper alloy wire can be replaced by other wires with similar properties or functions, and only the condition that the resistance change and the external pressure are approximately in a linear function relationship needs to be met, the piezoresistive coefficient K is approximately constant, and the resistance temperature coefficient is small.
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