CN112225471A - Optical fiber hydrogen loading method and system - Google Patents
Optical fiber hydrogen loading method and system Download PDFInfo
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- CN112225471A CN112225471A CN202011126175.9A CN202011126175A CN112225471A CN 112225471 A CN112225471 A CN 112225471A CN 202011126175 A CN202011126175 A CN 202011126175A CN 112225471 A CN112225471 A CN 112225471A
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 294
- 239000001257 hydrogen Substances 0.000 title claims abstract description 287
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 287
- 239000013307 optical fiber Substances 0.000 title claims abstract description 100
- 238000011068 loading method Methods 0.000 title claims description 42
- 238000000034 method Methods 0.000 claims abstract description 113
- 230000008569 process Effects 0.000 claims abstract description 90
- 239000007789 gas Substances 0.000 claims description 37
- 239000007788 liquid Substances 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000005984 hydrogenation reaction Methods 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 17
- 230000000875 corresponding effect Effects 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 230000001276 controlling effect Effects 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 7
- 150000002431 hydrogen Chemical class 0.000 description 6
- 239000008213 purified water Substances 0.000 description 6
- 206010034972 Photosensitivity reaction Diseases 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 230000036211 photosensitivity Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000003094 perturbing effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/66—Chemical treatment, e.g. leaching, acid or alkali treatment
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02114—Refractive index modulation gratings, e.g. Bragg gratings characterised by enhanced photosensitivity characteristics of the fibre, e.g. hydrogen loading, heat treatment
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- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The embodiment of the invention provides a method and a system for carrying hydrogen by an optical fiber, wherein the method for carrying hydrogen by the optical fiber comprises the following steps: s1, placing the optical fiber in a hydrogen carrying kettle, and vacuumizing the hydrogen carrying kettle until the inside of the hydrogen carrying kettle reaches a preset vacuum degree; s2, setting hydrogen carrying parameters of the hydrogen carrying kettle and a plurality of hydrogen carrying processes corresponding to different hydrogen carrying parameters, and controlling the hydrogen carrying kettle to sequentially execute the hydrogen carrying processes on the optical fiber, wherein the hydrogen carrying parameters comprise hydrogen carrying pressure, temperature and duration; s3, releasing pressure and exhausting air to the hydrogen-carrying kettle, and taking out the optical fiber loaded with hydrogen in the hydrogen-carrying kettle; the invention realizes the diversification of the process of carrying hydrogen by the optical fiber, can greatly improve the efficiency of carrying hydrogen by the optical fiber, and effectively solves the problem that the prior hydrogen carrying process which only can realize single pressure and single temperature cannot meet the requirement of the permeation concentration of hydrogen molecules required by the optical fibers with different specifications.
Description
Technical Field
The invention relates to the technical field of optical fiber manufacturing, in particular to an optical fiber hydrogen carrying method and system.
Background
With the continuous development of high-power fiber laser systems, fiber gratings are used as one of indispensable key devices of all-fiber lasers, and have increasingly broad application prospects in the fields of fiber communication, fiber sensing and the like. The fiber grating is made of a photosensitive part made of fiber materials, wherein the photosensitive part is a one-dimensional periodic structure with the refractive index being periodically distributed, and the refractive index of the fiber is formed by periodically perturbing the refractive index of the fiber core of the fiber due to the characteristic that the refractive index of the fiber has the characteristic of being correspondingly changed along with the spatial distribution of light intensity when ultraviolet light passes through the doped fiber.
The optical fiber hydrogen-carrying technology is an effective method for improving the photosensitivity of the optical fiber in an external mode, has the characteristics of simple preparation and low cost, and can greatly improve the photosensitivity of the optical fiber. The principle of optical fiber hydrogen carrying is that after the optical fiber is placed in a high-pressure hydrogen environment for a period of time, hydrogen molecules are gradually diffused into a cladding and a fiber core of the optical fiber, and when ultraviolet light with specific wavelength is irradiated to the optical fiber carrying the hydrogen, the hydrogen molecules of the irradiated part in the fiber core react with germanium in the optical fiber to form Ge-OH bonds and Ge-H bonds, so that the refractive index of the part of the optical fiber is permanently enhanced. Therefore, the photosensitivity of the optical fiber can be improved by dozens of times to hundreds of times through the hydrogen carrying process, so that the refractive index of the optical fiber is changed, and the requirement of writing the optical fiber grating is met.
The conventional main operation for carrying hydrogen on an optical fiber is as follows: firstly, rewinding an optical fiber onto an optical fiber disc; then, placing the hydrogen carrying disc in a hydrogen carrying kettle, sealing the hydrogen carrying kettle, and introducing hydrogen with certain pressure into the hydrogen carrying kettle after vacuumizing the hydrogen carrying kettle; then, a water bath switch is turned on, the hydrogen-carrying temperature is set, and after the hydrogen-carrying kettle is manually checked to be airtight, the temperature and the pressure are kept for a period of time; and finally, releasing pressure manually, taking out the optical fiber loaded with hydrogen, and completing the hydrogen loading process of the optical fiber. However, the above-mentioned hydrogen-carrying process can only be operated at a single pressure and a single temperature, and when the pressure or temperature needs to be changed during the hydrogen-carrying process, the above-mentioned hydrogen-carrying process needs to be manually repeated, which is very complicated and tedious in operation.
Along with the increase of the power of the optical fiber laser, the performance of the needed optical fiber grating is improved, the diameter of the corresponding optical fiber grating is increased, and the difficulty of hydrogen loading is increased along with the increase of the diameter of the optical fiber. In order to achieve the writing conditions for manufacturing fiber gratings, the fiber needs to be permeable to hydrogen molecules at a sufficient concentration. According to the principle of molecular permeation, hydrogen molecules permeate at high temperature at a high rate but have a low concentration, and correspondingly, hydrogen molecules permeate at low temperature at a low rate but have a high concentration. At present, the penetration concentration of hydrogen molecules required by the optical fiber is difficult to achieve only through high temperature and high pressure, and the high-power optical fiber grating writing condition is achieved. Therefore, the traditional hydrogen carrying process is difficult to meet the permeation concentration requirements of hydrogen molecules required by optical fibers with different specifications, and dozens of times of time is required for reaching the specified hydrogen permeation concentration, so that the hydrogen carrying efficiency is greatly influenced.
Disclosure of Invention
The embodiment of the invention provides a method and a system for carrying hydrogen by an optical fiber, which are used for solving the problems that the hydrogen carrying efficiency of the existing hydrogen carrying process on the optical fiber is low and the requirement on the permeation concentration of hydrogen molecules required by optical fibers with different specifications is difficult to meet.
The embodiment of the invention provides an optical fiber hydrogen carrying method, which comprises the following steps: s1, placing the optical fiber in a hydrogen carrying kettle, and vacuumizing the hydrogen carrying kettle until the inside of the hydrogen carrying kettle reaches a preset vacuum degree; s2, setting hydrogen carrying parameters of the hydrogen carrying kettle and a plurality of hydrogen carrying processes corresponding to different hydrogen carrying parameters, and controlling the hydrogen carrying kettle to sequentially execute the hydrogen carrying processes on the optical fiber, wherein the hydrogen carrying parameters comprise hydrogen carrying pressure, temperature and duration; and S3, releasing pressure and exhausting air for the hydrogen-carrying kettle, and taking out the optical fiber carrying hydrogen in the hydrogen-carrying kettle.
According to the method for carrying hydrogen on the optical fiber in one embodiment of the present invention, S2 further includes: the hydrogen carrying pressure and temperature corresponding to a plurality of hydrogen carrying processes are set to be in gradient descending distribution in sequence according to the hydrogen carrying process; correspondingly, the hydrogen carrying kettle is controlled to sequentially execute a plurality of hydrogen carrying processes on the optical fiber according to the hydrogen carrying processes.
According to the method for carrying hydrogen on the optical fiber in one embodiment of the present invention, S2 further includes: s21, setting a first hydrogen loading process and a second hydrogen loading process of the hydrogen loading kettle, wherein the pressure of hydrogen loading in the first hydrogen loading process is 12MPa-30MPa, the temperature is 50-90 ℃, and the time length is 5-24 h, and the pressure of hydrogen loading in the second hydrogen loading process is 12MPa-30MPa, the temperature is 20-40 ℃, and the time length is 5-24 h; and S22, controlling the hydrogen-carrying kettle to sequentially execute the first hydrogen-carrying process and the second hydrogen-carrying process on the optical fiber.
According to the optical fiber hydrogen carrying method provided by the embodiment of the invention, the pressure of hydrogen carried in the first hydrogen carrying process is 16MPa, the temperature is 50 ℃, and the time duration is 10 h; the pressure of hydrogen carried in the second hydrogen carrying process is 12MPa, the temperature is 20 ℃, and the time duration is 10 h.
According to the method for carrying hydrogen on the optical fiber in one embodiment of the present invention, S2 further includes: and in the process of carrying hydrogen on the optical fiber, acquiring and displaying the current hydrogen carrying parameters of the hydrogen carrying kettle in real time.
According to the method for carrying the hydrogen on the optical fiber, the hydrogen is carried on the optical fiber in a manual control mode or an automatic control mode according to the operations from S1 to S3; alternatively, the hydrogen loading operation is performed by sequentially controlling the plurality of hydrogen loading tanks in accordance with the operations from S1 to S3.
The embodiment of the invention also provides a hydrogen carrying system of the optical fiber hydrogen carrying method, which comprises a hydrogen carrying kettle, and a pressurization hydrogenation subsystem, a vacuumizing subsystem, a temperature control subsystem and a pressure relief subsystem which are connected with the hydrogen carrying kettle.
According to the hydrogen carrying system provided by the embodiment of the invention, the pressurization hydrogenation subsystem comprises a pressurization device, a pressurization main gas path and a plurality of pressurization branch gas paths, one end of the pressurization main gas path is used for being communicated with a hydrogen gas source, the pressurization device is arranged on the pressurization main gas path, the other end of the pressurization main gas path is used for being communicated with one ends of the plurality of pressurization branch gas paths, and the other ends of the pressurization branch gas paths are communicated with the hydrogen carrying kettles in a one-to-one correspondence manner.
According to the hydrogen carrying system provided by the embodiment of the invention, the vacuumizing subsystem comprises a vacuum pump and a vacuumizing pipeline, one end of the vacuumizing pipeline is communicated with the vacuum pump, and the other end of the vacuumizing pipeline is communicated with the other end of the pressurization main gas circuit; and/or the pressure relief subsystem comprises pressure relief pipelines, and one ends of the pressure relief pipelines are communicated with the pressure boosting branch gas circuits in a one-to-one correspondence manner.
According to the hydrogen carrying system provided by the embodiment of the invention, the temperature control subsystem comprises a liquid bath device, a heating device and a temperature measuring element, a liquid bath cavity is formed between the liquid bath device and the outer side wall of the hydrogen carrying kettle, the heating device and the temperature measuring element are both arranged in the liquid bath cavity, and the temperature measuring element is in communication connection with the heating device.
The hydrogen carrying system according to an embodiment of the present invention further includes: and the control system is respectively in communication connection with the pressurization and hydrogenation subsystem, the vacuumizing subsystem, the temperature control subsystem and the pressure relief subsystem.
The method and the system for carrying hydrogen by the optical fiber provided by the embodiment of the invention have the advantages that when the hydrogen is carried by the optical fiber, by setting a plurality of hydrogen carrying processes with different hydrogen carrying parameters to carry out hydrogen carrying operation on the optical fiber in sequence, the optical fiber can be carried out under the same hydrogen carrying pressure, the hydrogen carrying temperature of each hydrogen carrying process is controlled in a gradient way, and the hydrogen carrying temperature can be controlled under the same hydrogen carrying temperature, the hydrogen carrying pressure of each hydrogen carrying process is controlled in a gradient way, and the hydrogen carrying pressure and the hydrogen carrying temperature of each hydrogen carrying process can be controlled in a gradient way, thereby realizing the diversification of the hydrogen carrying process of the optical fiber and the continuous switching from the high-pressure and high-temperature hydrogen carrying process to the high-pressure and low-temperature hydrogen carrying process, and further greatly improves the hydrogen carrying efficiency of the optical fiber, and effectively solves the problem that the existing hydrogen carrying process which only can realize single pressure and single temperature cannot meet the requirement of the permeation concentration of hydrogen molecules required by optical fibers with different specifications.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for loading hydrogen on an optical fiber according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a hydrogen carrying system based on an optical fiber hydrogen carrying method according to an embodiment of the present invention.
In the figure, 1, a hydrogen-carrying kettle; 2. a pressurized hydrogenation subsystem; 20. a main gas circuit is pressurized; 21. a pressurizing branch gas circuit; 22. a hydrogen gas source; 23. a pressure boosting device; 24. a first pressure sensor; 25. a first pressure gauge; 26. a first control valve; 27. a second pressure sensor; 28. a second pressure gauge; 29. a second control valve; 3. a vacuum pumping subsystem; 30. a vacuum pumping pipeline; 31. a vacuum pump; 32. a third pressure sensor; 33. a third pressure gauge; 34. a third control valve; 4. a temperature control subsystem; 40. a liquid bath device; 41. a heating device; 42. a temperature measuring element; 43. a temperature controller; 5. a pressure relief subsystem; 50. a pressure relief pipeline; 51. a fourth control valve; 6. and (5) controlling the system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the present embodiment provides a method for loading hydrogen on an optical fiber, including: s1, placing the optical fiber in a hydrogen carrying kettle, and vacuumizing the hydrogen carrying kettle until the inside of the hydrogen carrying kettle reaches a preset vacuum degree; s2, setting hydrogen carrying parameters of the hydrogen carrying kettle and a plurality of hydrogen carrying processes corresponding to different hydrogen carrying parameters, and controlling the hydrogen carrying kettle to sequentially execute the hydrogen carrying processes on the optical fiber, wherein the hydrogen carrying parameters comprise hydrogen carrying pressure, temperature and duration; and S3, releasing pressure and exhausting gas to the hydrogen-carrying kettle, and taking out the optical fiber loaded with hydrogen in the hydrogen-carrying kettle.
Specifically, in the embodiment, the optical fiber can be rewound to form the optical fiber disc, the optical fiber disc is placed in the hydrogen carrying kettle, and the hydrogen carrying kettle is vacuumized until the preset vacuum degree is reached in the hydrogen carrying kettle, so that the hydrogen in the hydrogen carrying kettle reaches higher concentration when the optical fiber carries hydrogen, and the safety of hydrogen carrying operation is ensured; meanwhile, a plurality of hydrogen carrying processes with different hydrogen carrying parameters are arranged to sequentially carry out hydrogen carrying operation on the optical fiber, so that the hydrogen carrying temperature of each hydrogen carrying process can be changed under the same hydrogen carrying pressure, the hydrogen carrying pressure of each hydrogen carrying process can also be changed under the same hydrogen carrying temperature, and the hydrogen carrying pressure and the hydrogen carrying temperature of each hydrogen carrying process can also be subjected to gradient control, so that the diversification of the hydrogen carrying process of the optical fiber can be realized, the hydrogen carrying efficiency of the optical fiber can be greatly improved, and the problem that the existing hydrogen carrying process only capable of realizing single pressure and single temperature cannot meet the permeation concentration requirements of hydrogen molecules required by optical fibers with different specifications is effectively solved.
It should be noted here that, according to the principle of molecular permeation, the hydrogen molecule permeation speed at high temperature is fast, but the concentration is low, and correspondingly, the hydrogen molecule permeation speed at low temperature is slow, but the concentration is high, so that when the hydrogen carrying parameters corresponding to the hydrogen carrying processes are set, the hydrogen carrying pressures and temperatures corresponding to the plurality of hydrogen carrying processes are all distributed in a gradient descending manner in sequence according to the hydrogen carrying processes in the present embodiment; correspondingly, the hydrogen carrying kettle is controlled to sequentially execute a plurality of hydrogen carrying processes on the optical fiber according to the hydrogen carrying processes. The penetration concentration of hydrogen molecules in the optical fiber is greatly improved by adopting a mode of matching high temperature and high pressure with low temperature and high pressure, so that the optical fiber achieves the writing condition of the high-power fiber grating.
Meanwhile, in the present embodiment, hydrogen may be loaded into the optical fiber by manual control or automatic control according to the operations from S1 to S3, or hydrogen loading operations may be performed by sequentially controlling a plurality of hydrogen loading tanks according to the operations from S1 to S3.
Preferably, S2 shown in this embodiment specifically includes: s21, setting a first hydrogen loading process and a second hydrogen loading process of the hydrogen loading kettle, namely the hydrogen loading process shown in the embodiment comprises the first hydrogen loading process and the second hydrogen loading process, wherein the pressure of hydrogen loading in the first hydrogen loading process is 12MPa-30MPa, the temperature is 50-90 ℃, and the time duration is 5h-24h, and the pressure of hydrogen loading in the second hydrogen loading process is 12MPa-30MPa, the temperature is 20-40 ℃, and the time duration is 5h-24 h; and S22, controlling the hydrogen-loading kettle to sequentially execute a first hydrogen-loading process and a second hydrogen-loading process on the optical fiber.
Preferably, in the first embodiment, the pressure of hydrogen carried in the first hydrogen carrying process is 30MPa, the temperature is 90 ℃ and the time length is 5h, and the pressure of hydrogen carried in the second hydrogen carrying process is 30MPa, the temperature is 40 ℃ and the time length is 5 h.
Preferably, in the second embodiment, the pressure of hydrogen carried in the first hydrogen carrying process is 12MPa, the temperature is 90 ℃ and the time length is 24h, and the pressure of hydrogen carried in the second hydrogen carrying process is 12MPa, the temperature is 20 ℃ and the time length is 24 h.
Preferably, in the third specific embodiment, the pressure of hydrogen carried in the first hydrogen carrying process is 16MPa, the temperature is 50 ℃, and the time length is 10 h; the pressure of hydrogen carried in the second hydrogen carrying process is 12MPa, the temperature is 20 ℃, and the time duration is 10 h.
In the third embodiment, when the hydrogen carrying process is switched from the first hydrogen carrying process to the second hydrogen carrying process, the gradient reduction control is performed on the pressure of the carried hydrogen, and the gradient reduction control is also performed on the temperature of the carried hydrogen, so that the hydrogen carrying efficiency can be greatly improved, the safety of the carried hydrogen is ensured, and meanwhile, the optical fiber after carrying the hydrogen reaches the required osmotic concentration of hydrogen molecules.
Preferably, in order to facilitate real-time monitoring and subsequent data analysis of the hydrogen carrying process, S2 shown in this embodiment may further collect and display the current hydrogen carrying parameters of the hydrogen carrying tank in real time during the hydrogen carrying process by the optical fiber, wherein the pressure, temperature and time of the hydrogen carrying tank may be specifically displayed in the form of a curve or a table.
As shown in fig. 2, the present embodiment further provides a hydrogen carrying system of the optical fiber hydrogen carrying method, which includes a hydrogen carrying kettle 1, a pressure increasing and hydrogenation subsystem 2 connected to the hydrogen carrying kettle 1, a vacuum pumping subsystem 3, a temperature control subsystem 4, and a pressure relief subsystem 5, where the hydrogen carrying kettle 1 shown in the present embodiment includes a kettle cover and a kettle body, and after the kettle cover is mounted on the kettle body and locked, a closed cavity for carrying hydrogen on an optical fiber can be formed.
Specifically, the pressurization hydrogenation subsystem 2 in this embodiment includes supercharging device 23, the main gas circuit 20 of pressurization and a plurality of pressure boost branch gas circuit 21, and the one end of the main gas circuit 20 of pressurization is used for communicateing hydrogen gas source 22, installs supercharging device 23 on the main gas circuit 20 of pressurization, and the other end of the main gas circuit 20 of pressurization is used for communicateing the one end of a plurality of pressure boost branch gas circuits 21, and the other end one-to-one ground of the branch gas circuit 21 of pressurization communicates and carries hydrogen cauldron 1.
The booster 23 shown in the present embodiment may be a booster pump known in the art. The hydrogen gas source 22 shown in this embodiment may be a hydrogen cylinder as is known in the art. In order to facilitate pressure monitoring and control of the hydrogen gas, the main pressurizing gas path 20 shown in this embodiment is provided with two first pressure sensors 24, two first pressure gauges 25 and two first control valves 26, one of the first pressure gauges 25 is used for monitoring the pressure of the hydrogen gas output by the hydrogen gas source 22, and the other one of the first pressure gauges 25 is used for monitoring the pressure of the hydrogen gas pressurized by the pressurizing device 23. Meanwhile, in order to facilitate pressure monitoring and control of the hydrogen gas flowing through each of the pressure branch gas paths 21, the pressure branch gas path 21 shown in this embodiment is provided with a second pressure sensor 27, a second pressure gauge 28, and a second control valve 29.
It should be noted that, in order to control the safety of the pressurization of the hydrogen gas, the main pressurization gas path 20 shown in the present embodiment is further provided with a safety valve, and the safety valve is located on the output side of the pressurization device 23. Meanwhile, the first control valve 26 and the second control valve 29 shown in the above embodiments may be each a pneumatic valve known in the art.
As shown in fig. 2, in order to facilitate the control of the vacuum-pumping operation of the hydrogen-carrying kettles 1 at one time, the vacuum-pumping subsystem 3 shown in this embodiment includes a vacuum pump 31 and a vacuum-pumping pipeline 30, one end of the vacuum-pumping pipeline 30 is communicated with the vacuum pump 31, and the other end of the vacuum-pumping pipeline 30 is communicated with the other end of the pressurization main gas circuit 20; meanwhile, in order to facilitate the implementation of the pressure relief operation control on each hydrogen-carrying kettle 1, the pressure relief subsystem 5 shown in this embodiment includes a pressure relief pipeline 50, and one end of the pressure relief pipeline 50 is communicated with the pressure boost branch gas circuit 21 in a one-to-one correspondence manner.
Specifically, in order to facilitate the realization of pressure monitoring and control during vacuum pumping, a third pressure sensor 32, a third pressure gauge 33 and a third control valve 34 are installed on the vacuum pumping pipeline 30 shown in the embodiment; meanwhile, in order to monitor and control the pressure during the pressure relief, a fourth control valve 51 is installed on the pressure relief pipeline 50 shown in the present embodiment, one end of the pressure relief pipeline 50 is installed in the middle of the pressure boost branch gas path 21, and the second pressure sensor 27 and the second pressure gauge 28 are arranged on the pressure boost branch gas path 21 between the pressure relief pipeline 50 and the hydrogen carrier 1, wherein the third control valve 34 shown in the present embodiment may be a pneumatic valve known in the art, and the fourth control valve 51 may be a pressure relief valve known in the art.
As shown in fig. 2, in order to facilitate the control of the temperature of the hydrogen loaded in the hydrogen loading kettle 1, the temperature control subsystem 4 shown in this embodiment includes a liquid bath device 40, a heating device 41, and a temperature measuring element 42, a liquid bath cavity is formed between the liquid bath device 40 and the outer side wall of the hydrogen loading kettle 1, the heating device 41 and the temperature measuring element 42 are both disposed in the liquid bath cavity, and the temperature measuring element 42 is in communication connection with the heating device 41.
Specifically, the liquid bath device 40 shown in this embodiment may control the temperature of the hydrogen carrying kettle 1 in a water bath or oil bath manner, wherein, in this embodiment, the liquid bath device 40 preferably uses purified water as a heat exchange medium, so that the liquid bath device 40 can be correspondingly set as a water bath, the hydrogen carrying kettle 1 can be placed in the water bath, and a liquid bath cavity is formed between the outer side wall of the hydrogen carrying kettle 1 and the wall of the water bath. The heating device 41 shown in this embodiment is specifically an electric heating rod, and the electric heating rod may be provided in plurality and distributed in the liquid bath cavity. The temperature measuring element 42 shown in this embodiment may be a temperature sensor known in the art, the detecting end of the temperature sensor extends into the liquid bath cavity, the temperature sensor may be connected to the temperature controller 43 in a communication manner, and the temperature controller 43 controls the heating time and the heating power of the heating device 41, wherein the temperature controller 43 may set the heating temperature of the purified water in the liquid bath cavity to be 20 ℃ to 100 ℃.
Based on the improvement of the above embodiment, the present embodiment is further provided with a control system 6, and the control system 6 is respectively in communication connection with the pressurization hydrogenation subsystem 2, the vacuum pumping subsystem 3, the temperature control subsystem 4 and the pressure relief subsystem 5.
Specifically, the control system 6 shown in this embodiment includes a control module and a control interface in communication connection with the control module, the control module may be a PLC controller or a touch screen controller known in the art, and the control interface may be an operation panel provided with a display and operation buttons known in the art, or may be a touch screen operation interface known in the art. The first pressure sensor 24, the second pressure sensor 27, the third pressure sensor 32 and the temperature controller 43 shown in the above embodiments may be connected to the control module of the control system 6 in a communication manner, and the control module may control the operation dynamics of the vacuum pump 31, the pressure boosting device 23, the first control valve 26, the second control valve 29, the third control valve 34 and the fourth control valve 51 in real time.
Thus, in the automatic control mode, the hydrogen loading operation on the fiber is as follows:
firstly, the vacuumizing subsystem 3 is started, the vacuum pump 31 and the third control valve 34 on the vacuumizing pipeline 30 are controlled to be opened, the second control valve 29 on the pressurization branch gas circuit 21 corresponding to the hydrogen-carrying kettle 1 is controlled to be opened, the hydrogen-carrying kettle 1 containing the optical fiber disc is vacuumized, after the specified vacuum degree in the cavity of the hydrogen-carrying kettle 1 is reached, the related valves are automatically controlled to be closed, the vacuum pump 31 is automatically controlled to be closed, and the vacuumizing process is completed.
Then, a plurality of hydrogen carrying processes are set through the control interface of the control system 6, and the corresponding hydrogen carrying pressure, temperature and time length of each hydrogen carrying process are input, so as to control the start of the pressurizing device 23 of the pressurizing hydrogenation subsystem 2, and open the corresponding first control valve 26 and second control valve 29, so as to introduce hydrogen into the corresponding hydrogen carrying kettle 1. When the pressure of the hydrogen in the hydrogen-carrying kettle 1 reaches the preset pressure, the system automatically controls the corresponding control valve on the pressurization and hydrogenation subsystem 2 to close so as to maintain the pressure of the hydrogen-carrying kettle 1 according to the preset duration.
Meanwhile, the temperature control subsystem 4 is started, purified water is injected into the water bath until the purified water reaches a preset water level, and the purified water is heated by the electric heating rod under the monitoring of the temperature sensor until the water temperature of the purified water is heated to a preset temperature.
In the process, if other hydrogen-carrying kettles 1 need to carry hydrogen, the next hydrogen-carrying kettle can be selected through the control interface, and the process is repeated.
After each hydrogen-carrying kettle 1 completes the corresponding hydrogen-carrying process, the system automatically controls and starts the pressure relief subsystem 5, and opens the fourth control valve 51 to realize pressure relief and exhaust of the corresponding hydrogen-carrying kettle 1; the fourth control valve 51 may also be a manual control valve, and after the hydrogen loading process of each hydrogen loading kettle 1 is completed in the automatic mode, the fourth control valve 51 may be manually operated to complete pressure relief and exhaust of the corresponding hydrogen loading kettle 1.
Finally, the optical fiber which is completely loaded with hydrogen is taken out from the hydrogen loading kettle 1.
It should be noted that, in this embodiment, a manual/automatic switching knob may be further disposed on the control interface of the control system 6, and when the hydrogen loading operation on the optical fiber is switched from the automatic mode to the manual mode through the manual/automatic switching knob, the pressurization and hydrogenation subsystem 2, the vacuum pumping subsystem 3, the temperature control subsystem 4, and the pressure relief subsystem 5 may be respectively controlled to perform corresponding actions through a plurality of electric control buttons disposed on the control interface according to the operation steps in the automatic mode, so as to complete the hydrogen loading operation on the optical fiber.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A method for loading hydrogen on an optical fiber, comprising:
s1, placing the optical fiber in a hydrogen carrying kettle, and vacuumizing the hydrogen carrying kettle until the inside of the hydrogen carrying kettle reaches a preset vacuum degree;
s2, setting hydrogen carrying parameters of the hydrogen carrying kettle and a plurality of hydrogen carrying processes corresponding to different hydrogen carrying parameters, and controlling the hydrogen carrying kettle to sequentially execute the hydrogen carrying processes on the optical fiber, wherein the hydrogen carrying parameters comprise hydrogen carrying pressure, temperature and duration;
and S3, releasing pressure and exhausting air for the hydrogen-carrying kettle, and taking out the optical fiber carrying hydrogen in the hydrogen-carrying kettle.
2. The optical fiber hydrogen carrying method according to claim 1, wherein S2 further comprises: the hydrogen carrying pressure and temperature corresponding to a plurality of hydrogen carrying processes are set to be in gradient descending distribution in sequence according to the hydrogen carrying process; correspondingly, the hydrogen carrying kettle is controlled to sequentially execute a plurality of hydrogen carrying processes on the optical fiber according to the hydrogen carrying processes.
3. The optical fiber hydrogen carrying method according to claim 2, wherein S2 further comprises: s21, setting the hydrogen carrying process to comprise a first hydrogen carrying process and a second hydrogen carrying process, wherein the pressure of hydrogen carrying in the first hydrogen carrying process is 12MPa-30MPa, the temperature is 50-90 ℃, and the time length is 5-24 h, and the pressure of hydrogen carrying in the second hydrogen carrying process is 12MPa-30MPa, the temperature is 20-40 ℃, and the time length is 5-24 h;
and S22, controlling the hydrogen-carrying kettle to sequentially execute the first hydrogen-carrying process and the second hydrogen-carrying process on the optical fiber.
4. The optical fiber hydrogen carrying method according to claim 3, wherein the pressure of the hydrogen carried in the first hydrogen carrying process is 16MPa, the temperature is 50 ℃, and the time duration is 10 h; the pressure of hydrogen carried in the second hydrogen carrying process is 12MPa, the temperature is 20 ℃, and the time duration is 10 h.
5. The optical fiber hydrogen carrying method according to claim 1, wherein in the process of carrying hydrogen on the optical fiber, the current hydrogen carrying parameters of the hydrogen carrying kettle are collected and displayed in real time;
or, according to the operations from S1 to S3, the optical fiber is loaded with hydrogen in a manual control or automatic control mode;
alternatively, the hydrogen loading operation is performed by sequentially controlling the plurality of hydrogen loading tanks in accordance with the operations from S1 to S3.
6. A hydrogen carrying system of the optical fiber hydrogen carrying method according to any one of claims 1 to 5, comprising a hydrogen carrying kettle, and a pressurization hydrogenation subsystem, a vacuum pumping subsystem, a temperature control subsystem and a pressure relief subsystem which are connected with the hydrogen carrying kettle.
7. The hydrogen carrying system according to claim 6, wherein the pressurized hydrogenation subsystem comprises a pressurizing device, a pressurized main gas path and a plurality of pressurized branch gas paths, one end of the pressurized main gas path is used for being communicated with a hydrogen gas source, the pressurizing device is installed on the pressurized main gas path, the other end of the pressurized main gas path is used for being communicated with one ends of the plurality of pressurized branch gas paths, and the other ends of the pressurized branch gas paths are communicated with the hydrogen carrying kettles in a one-to-one correspondence manner.
8. The hydrogen carrying system according to claim 7, wherein the evacuation subsystem comprises a vacuum pump and an evacuation pipeline, one end of the evacuation pipeline is communicated with the vacuum pump, and the other end of the evacuation pipeline is communicated with the other end of the pressurization main gas path;
and/or the pressure relief subsystem comprises pressure relief pipelines, and one ends of the pressure relief pipelines are communicated with the pressure boosting branch gas circuits in a one-to-one correspondence manner.
9. The hydrogen carrying system of claim 6, wherein the temperature control subsystem comprises a liquid bath device, a heating device and a temperature measuring element, a liquid bath cavity is formed between the liquid bath device and the outer side wall of the hydrogen carrying kettle, the heating device and the temperature measuring element are both arranged in the liquid bath cavity, and the temperature measuring element is in communication connection with the heating device.
10. The hydrogen-carrying system according to any one of claims 6 to 9, further comprising: and the control system is respectively in communication connection with the pressurization and hydrogenation subsystem, the vacuumizing subsystem, the temperature control subsystem and the pressure relief subsystem.
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|---|---|---|---|
| CN202011126175.9A CN112225471A (en) | 2020-10-20 | 2020-10-20 | Optical fiber hydrogen loading method and system |
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| CN202011126175.9A CN112225471A (en) | 2020-10-20 | 2020-10-20 | Optical fiber hydrogen loading method and system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09211246A (en) * | 1996-02-01 | 1997-08-15 | Sumitomo Electric Ind Ltd | Method of manufacturing waveguide diffraction grating |
| US20090110899A1 (en) * | 2007-10-31 | 2009-04-30 | Kenneth Edward Hrdina | Hydrogen loading of near net shape optics |
| CN107473580A (en) * | 2017-09-20 | 2017-12-15 | 深圳伊讯科技有限公司 | A kind of optical fiber carries hydrogen production device and method |
-
2020
- 2020-10-20 CN CN202011126175.9A patent/CN112225471A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09211246A (en) * | 1996-02-01 | 1997-08-15 | Sumitomo Electric Ind Ltd | Method of manufacturing waveguide diffraction grating |
| US20090110899A1 (en) * | 2007-10-31 | 2009-04-30 | Kenneth Edward Hrdina | Hydrogen loading of near net shape optics |
| CN107473580A (en) * | 2017-09-20 | 2017-12-15 | 深圳伊讯科技有限公司 | A kind of optical fiber carries hydrogen production device and method |
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Application publication date: 20210115 |