CN113959627A - High and low temperature resistant vehicle-mounted liquid hydrogen cylinder capacitance sensor - Google Patents
High and low temperature resistant vehicle-mounted liquid hydrogen cylinder capacitance sensor Download PDFInfo
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- CN113959627A CN113959627A CN202111248030.0A CN202111248030A CN113959627A CN 113959627 A CN113959627 A CN 113959627A CN 202111248030 A CN202111248030 A CN 202111248030A CN 113959627 A CN113959627 A CN 113959627A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/12—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance, i.e. electric circuits therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20309—Evaporators
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20318—Condensers
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Physics & Mathematics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a high and low temperature resistant vehicle-mounted liquid hydrogen bottle capacitance sensor, which belongs to the field of capacitance sensors and comprises a shell and a capacitance sensor, wherein a mounting groove is arranged in the shell, the capacitance sensor is fixed in the mounting groove, the outer wall of the shell is provided with a hot through groove and a cold through groove, the output ends of the hot through groove and the cold through groove are communicated with the mounting groove, an annular sliding groove is arranged in the shell, the input ends of the hot through groove and the cold through groove are communicated with the annular sliding groove, a sliding ring is connected in the annular sliding groove in a sliding way, the sliding direction of the sliding ring is the axial direction of the annular sliding groove, a plurality of supporting columns are uniformly arranged at equal angles on one side of the inner wall of the annular sliding groove, grooves matched with the supporting columns are arranged on the sliding ring, and air bags are fixed between the grooves and the supporting columns. Has market prospect and is suitable for popularization.
Description
Technical Field
The invention relates to the field of capacitive sensors, in particular to a high and low temperature resistant vehicle-mounted liquid hydrogen cylinder capacitive sensor.
Background
With the increasingly prominent global warming problem and the encouragement of hydrogen energy development and utilization in various countries, more and more hydrogen fuel cell vehicles are put into the market, and compared with fuel vehicles or electric vehicles, the hydrogen fuel cell vehicles use a vehicle-mounted hydrogen storage system as a power source and hydrogen as a fuel source of a fuel cell stack, so that the development of a vehicle-mounted hydrogen storage technology directly influences the endurance mileage, cost and safety of the fuel cell vehicles.
At present, the vehicle-mounted hydrogen storage system in China uses a high-pressure gas cylinder as a hydrogen storage container to store high-pressure hydrogen of 35MPa and 70 MPa. However, due to the limitation of the physical characteristics of hydrogen, the maximum volume hydrogen storage density of a high-pressure hydrogen storage bottle is only 25g/L, and the maximum volume hydrogen storage density does not reach the research and development target of the vehicle-mounted hydrogen storage technology of 'the mass hydrogen storage density is 7.5%, the volume energy density is 70g/L, and the subsequent mileage after one-time hydrogenation exceeds 500 km' formulated by the U.S. department of energy, like liquefied natural gas, in order to improve the hydrogen storage density of a vehicle-mounted hydrogen storage system, currently, China is actively developing hydrogen liquefaction and liquid hydrogen storage and transportation filling technology, low-temperature liquid hydrogen storage is to compress hydrogen and then cool the hydrogen to below-252 ℃, so that the hydrogen is liquefied and stored in a heat insulation vacuum container, compared with high-pressure gaseous hydrogen storage, the hydrogen storage quality and the volume energy density of the low-temperature liquid hydrogen storage are greatly improved, however, because the liquid hydrogen has a very low boiling point (-253 ℃), small vaporization latent heat (0.45kJ/g) and a large gas-liquid specific volume (845 times), the air pressure needs to be monitored in time in the storage process, the existing capacitance sensor cannot be used in a high-temperature and low-temperature state, and therefore the high-temperature and low-temperature resistant vehicle-mounted liquid hydrogen cylinder capacitance sensor is provided to solve the problems.
Disclosure of Invention
1. Technical problem to be solved
In view of the problems in the prior art, the invention aims to provide a vehicle-mounted liquid hydrogen cylinder capacitance sensor with high and low temperature resistance, through the mutual matching of the slip ring with the air bag and the support column and the shell with the hot through groove, the cold through groove and the annular pipe, when in use, when the liquid hydrogen in the vehicle-mounted liquid hydrogen bottle releases hydrogen, heat is released, the gas carrying the heat enters the annular chute, the carbon dioxide gas in the air bag is heated and expanded, so as to lift the slip ring away from the support column, the input end of the hot through groove is opened, the input end of the cold through groove is closed, the gas enters the mounting groove from the hot through groove, in the process that the gas enters the mounting groove, the heat carried by the gas enters the annular tube through the heat conduction fins, the heat volatilizes the liquid ammonia, the heat of the gas is effectively absorbed, so that the gas entering the mounting groove is cooled, and the purpose of protecting the capacitive sensor from being used at high temperature is achieved; when on-vehicle liquid hydrogen bottle installs liquid hydrogen additional, in-process that becomes liquid hydrogen is pressed to hydrogen pressure, absorb the heat, microthermal gas gets into in the annular chute, carbon dioxide gas in the gasbag receives the cold shrink, and then the pull-back sliding ring makes it be close to the support column, the input that the groove was led to the heat this moment seals, the input that the groove was led to the cold is opened, gas gets into the mounting groove from the cold groove of leading to, at the in-process of gas entering mounting groove, gaseous low temperature passes through in the heat conduction fin gets into the annular tube, the heat makes mercury solidify, and then effectively release heat, make the gaseous intensification that gets into the mounting groove, reach the purpose that protective capacitance sensor used at low temperature.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A high and low temperature resistant vehicle-mounted liquid hydrogen bottle capacitance sensor comprises a shell and a capacitance sensor, wherein a mounting groove matched with the capacitance sensor is arranged in the shell, the capacitance sensor is fixed in the mounting groove, a hot through groove and a cold through groove are arranged on the outer wall of the shell, the output ends of the hot through groove and the cold through groove are communicated with the mounting groove, an annular chute is arranged in the shell, the input ends of the hot through groove and the cold through groove are communicated with the annular chute, a sliding ring is connected in the annular chute in a sliding manner, the sliding direction of the sliding ring is the axial direction of the annular chute, a plurality of supporting columns are arranged on one side of the inner wall of the annular chute at equal angles, grooves matched with the supporting columns are arranged on the sliding ring, an air bag is fixed between the grooves and the supporting columns, high thermal expansion coefficient gas is filled in the air bag, a plurality of through holes communicated with the annular chute are arranged on the outer wall of the shell at equal angles, the heat conduction device is characterized in that an annular pipe is arranged between the hot through groove and the cold through groove, two closed containing cavities are separated into the annular pipe through a partition plate, filling liquid is arranged in each closed containing cavity and is high-specific heat capacity liquid, and heat conduction fins are fixed on one sides, close to the annular pipe, of the hot through groove and the cold through groove. According to the invention, through the mutual matching of the slip ring with the air bag and the support column and the shell with the hot through groove, the cold through groove and the annular tube, when the device is used, when liquid hydrogen in a vehicle-mounted liquid hydrogen bottle releases hydrogen, heat is released, gas carrying the heat enters the annular chute, carbon dioxide gas in the air bag is heated and expands, and then the slip ring is lifted to be away from the support column, at the moment, the input end of the hot through groove is opened, the input end of the cold through groove is closed, the gas enters the installation groove from the hot through groove, in the process that the gas enters the installation groove, the heat carried by the gas enters the annular tube through the heat conduction fin, the liquid ammonia is volatilized by the heat, and further the gas heat is effectively adsorbed, so that the gas entering the installation groove is cooled, and the purpose of protecting the capacitance sensor from being used at high temperature is achieved; when on-vehicle liquid hydrogen bottle installs liquid hydrogen additional, in-process that becomes liquid hydrogen is pressed to hydrogen pressure, absorb the heat, microthermal gas gets into in the annular chute, carbon dioxide gas in the gasbag receives the cold shrink, and then the pull-back sliding ring makes it be close to the support column, the input that the groove was led to the heat this moment seals, the input that the groove was led to the cold is opened, gas gets into the mounting groove from the cold groove of leading to, at the in-process of gas entering mounting groove, gaseous low temperature passes through in the heat conduction fin gets into the annular tube, the heat makes mercury solidify, and then effectively release heat, make the gaseous intensification that gets into the mounting groove, reach the purpose that protective capacitance sensor used at low temperature.
Further, capacitive sensor includes the glass layer of two relative settings, is equipped with bowl shape cavity between two relative glass layers, bowl shape cavity inner wall splice has the metal film, two the glass inter-layer clamp has the detection membrane, is close to the mounting groove be equipped with the inspection hole on the glass layer, it has ripple barrier film to splice on the inspection hole.
Further, the metal film and the detection film are all connected with a power supply through a terminal, the terminal is fixed on one side of the shell, the outer wall of the terminal is provided with a thread structure, the terminal is provided with a sealing nut matched with the thread structure, the terminal is fixed on a bottle valve of the vehicle-mounted liquid hydrogen bottle through the sealing nut, and the shell is arranged on the inner side of the valve of the vehicle-mounted liquid hydrogen bottle. Through the setting of terminal and gland nut, make the casing installation convenient, utilize the inspection hole simultaneously with pressure transfer to the detection membrane on, make metal film and detection form the unit potential difference between the membrane, reach capacitanc pressure measurement's purpose.
Furthermore, two groups of sealing plugs are arranged on the inner side of the ring body of the sliding ring, the sealing plugs are of elastic high-low temperature resistant rubber structures, and the distance between the two groups of sealing plugs is equal to the distance between the input ends of the hot through groove and the cold through groove.
Furthermore, a leading-in groove is formed in the outer side of the ring body of the slip ring. The leading-in of the gaseous leading-in of being convenient for through the setting of leading-in groove combines the setting of sealing plug, has effectively promoted the seal of the input that hot logical groove and cold logical groove.
Furthermore, the filling liquid in the closed containing cavity close to the cold through groove is mercury.
Further, liquid ammonia is filled in the closed containing cavity close to the hot through groove.
Furthermore, the two groups of heat conduction fins are both copper structures, and the heat conduction fins extend into the corresponding closed containing cavities.
Furthermore, the outer wall of the shell is provided with a vacuum chuck wall. Through the setting of vacuum chuck wall, can effectively completely cut off outside difference in temperature change, further effectively promote the thermal insulation performance of casing, effectively promoted capacitive sensor's resistant high low temperature performance.
Further, the gas with high thermal expansion coefficient is carbon dioxide gas.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme is through having the gasbag, the sliding ring of support column with have hot logical groove, cold logical groove, the inter-fitting in the casing of ring conduit, when using, when liquid hydrogen release hydrogen in the on-vehicle liquid hydrogen bottle, the release heat, smuggle thermal gas entering annular spout secretly, carbon dioxide gas in the gasbag is heated the inflation, and then the jacking sliding ring makes it keep away from the support column, the input that hot logical groove was opened this moment, the input that cold logical groove is sealed, gas gets into the mounting groove from hot logical groove, at the in-process that gaseous got into the mounting groove, the heat that gaseous smugglies passes through in the heat conduction fin gets into the ring conduit, the heat makes liquid ammonia volatilize, and then effectively adsorb the gas heat, make the gaseous cooling that gets into the mounting groove, reach the purpose that protection capacitance sensor used at high temperature.
(2) When on-vehicle liquid hydrogen bottle installs liquid hydrogen additional, in-process that becomes liquid hydrogen is pressed to hydrogen pressure, absorb the heat, microthermal gas gets into in the annular chute, carbon dioxide gas in the gasbag receives the cold shrink, and then the pull-back sliding ring makes it be close to the support column, the input that the groove was led to the heat this moment seals, the input that the groove was led to the cold is opened, gas gets into the mounting groove from the cold groove of leading to, at the in-process of gas entering mounting groove, gaseous low temperature passes through in the heat conduction fin gets into the annular tube, the heat makes mercury solidify, and then effectively release heat, make the gaseous intensification that gets into the mounting groove, reach the purpose that protective capacitance sensor used at low temperature.
(3) Through the setting of terminal and gland nut, make the casing installation convenient, utilize the inspection hole simultaneously with pressure transfer to the detection membrane on, make metal film and detection form the unit potential difference between the membrane, reach capacitanc pressure measurement's purpose.
(4) The leading-in of the gaseous leading-in of being convenient for through the setting of leading-in groove combines the setting of sealing plug, has effectively promoted the seal of the input that hot logical groove and cold logical groove.
(5) Through the setting of vacuum chuck wall, can effectively completely cut off outside difference in temperature change, further effectively promote the thermal insulation performance of casing, effectively promoted capacitive sensor's resistant high low temperature performance.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic bottom view of the present invention;
FIG. 3 is a schematic illustration of an explosive structure according to the present invention;
fig. 4 is a schematic structural diagram of a capacitive sensor proposed in the present invention;
fig. 5 is an exploded view of the capacitive sensor proposed in the present invention;
FIG. 6 is a schematic cross-sectional view of the present invention;
FIG. 7 is an enlarged view of portion A of FIG. 6;
FIG. 8 is an enlarged view of the portion B of FIG. 6;
FIG. 9 is a schematic view of the internal structure of the hydraulic pressure passing through the cold channel of the present invention;
fig. 10 is a schematic view of the internal structure of the hydraulic pressure passing thermal channel of the present invention.
The reference numbers in the figures illustrate:
the device comprises a shell 1, a through hole 11, a vacuum chuck wall 12, a mounting groove 13, a hot through groove 14, a cold through groove 15, an annular sliding groove 16, a binding post 2, a sealing nut 3, a heat conduction fin 4, a capacitance sensor 5, a detection hole 51, a glass layer 52, a detection film 53, a corrugated isolation film 54, an annular tube 6, a slip ring 7, an air bag 71, a support pillar 72, a sealing plug 73 and a guiding groove 74.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; 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.
Example 1:
referring to fig. 1-10, a high and low temperature resistant vehicle-mounted liquid hydrogen cylinder capacitance sensor comprises a housing 1 and a capacitance sensor 5, wherein a mounting groove 13 matched with the capacitance sensor 5 is arranged in the housing 1, the capacitance sensor 5 is fixed in the mounting groove 13, a hot through groove 14 and a cold through groove 15 are arranged on the outer wall of the housing 1, output ends of the hot through groove 14 and the cold through groove 15 are both communicated with the mounting groove 13, an annular sliding groove 16 is arranged in the housing 1, input ends of the hot through groove 14 and the cold through groove 15 are both communicated with the annular sliding groove 16, a sliding ring 7 is connected in the annular sliding groove 16 in a sliding manner, a sliding direction of the sliding ring 7 is an axial direction of the annular sliding groove 16, a plurality of supporting columns 72 are equally arranged at one side of the inner wall of the annular sliding groove 16 at equal angles, grooves matched with the supporting columns 72 are arranged on the sliding ring 7, an air bag 71 is fixed between the high-temperature supporting columns 72, and air expansion coefficient gas is filled in the air bag 71, high thermal expansion coefficient gas is carbon dioxide gas, the equal angle equipartition of outer wall of casing 1 is equipped with a plurality of through-holes 11 that are linked together with annular spout 16, it is equipped with annular pipe 6 to lead to between hot groove 14 and cold groove 15, separate into two airtight appearance chambeies through the baffle in the annular pipe 6, all be equipped with filling liquid in the airtight appearance intracavity, filling liquid is high specific heat capacity liquid, filling liquid is mercury in the airtight appearance intracavity that is close to cold groove 15, filling liquid is liquid ammonia in the airtight appearance intracavity that is close to hot groove 14, one side that hot groove 14 and cold groove 15 are close to annular pipe 6 all is fixed with heat conduction fin 4, two sets of heat conduction fins 4 are copper structure, heat conduction fin 4 all extends to corresponding airtight appearance intracavity.
According to the invention, through the mutual matching of the slip ring 7 with the air bag 71 and the support column 72 and the shell 1 with the hot through groove 14, the cold through groove, 15 and the annular tube 6, when in use, when liquid hydrogen in a vehicle-mounted liquid hydrogen bottle releases hydrogen, heat is released, the gas carrying the heat enters the annular chute 16, carbon dioxide gas in the air bag 71 is heated and expanded, and then the slip ring 7 is lifted to be away from the support column 72, at the moment, the input end of the hot through groove 14 is opened, the input end of the cold through groove 15 is closed, the gas enters the mounting groove 13 from the hot through groove 14, in the process that the gas enters the mounting groove 13, the heat carried by the gas enters the annular tube 6 through the heat conduction fin 4, the liquid ammonia is volatilized by the heat, and then the heat of the gas is effectively adsorbed, so that the temperature of the gas entering the mounting groove 13 is reduced, and the purpose of protecting the capacitive sensor 5 from high-temperature use is achieved; when on-vehicle liquid hydrogen bottle installs liquid hydrogen additional, in-process that becomes liquid hydrogen is pressurized by hydrogen, absorb the heat, microthermal gas gets into in the annular spout 16, carbon dioxide gas in the gasbag 71 receives the cold shrink, and then pull back sliding ring 7 and make it be close to support column 72, the input end that hot logical groove 14 closed this moment, the input of cold logical groove 15 is opened, gas gets into in mounting groove 13 from cold logical groove 15, at the in-process of gaseous entering mounting groove 13, gaseous low temperature gets into in the toroidal tube 6 through heat conduction fin 4, the heat makes mercury solidify, and then effectively release heat, make the gaseous intensification that gets into mounting groove 13, reach the purpose that protective capacitance sensor 5 used at low temperature.
Referring to fig. 1-10, a capacitive sensor 5 includes two glass layers 52 arranged oppositely, a bowl-shaped cavity is arranged between the two glass layers 52, a metal film is bonded to the inner wall of the bowl-shaped cavity, a detection film 53 is clamped between the two glass layers 52, a detection hole 51 is arranged on the glass layer 52 close to the mounting groove 13, a corrugated isolation film 54 is bonded to the detection hole 51, the metal film and the detection film 53 are both connected with an external power supply through a wiring terminal 2, the wiring terminal 2 is fixed on one side of a housing 1, the outer wall of the wiring terminal 2 is provided with a thread structure, a sealing nut 3 matched with the thread structure is arranged on the wiring terminal 2, the wiring terminal 2 is fixed on a bottle body valve of a vehicle-mounted liquid hydrogen bottle through the sealing nut 3, and the housing 1 is arranged on the inner side of the valve of the vehicle-mounted liquid hydrogen bottle. Through the arrangement of the wiring terminal 2 and the sealing nut 3, the shell 1 is convenient to mount, and meanwhile, the pressure is transmitted to the detection film 53 through the detection hole 51, so that a unit difference is formed between the metal film and the detection film 53, and the purpose of capacitive pressure detection is achieved.
Two groups of sealing plugs 73 are arranged on the inner side of the ring body of the sliding ring 7, the sealing plugs 73 are of elastic high-low temperature resistant rubber structures, the distance between the two groups of sealing plugs 73 is equal to the distance between the input ends of the hot through groove 14 and the cold through groove 15, and a leading-in groove 74 is arranged on the outer side of the ring body of the sliding ring 7. The arrangement of the leading-in groove 74 is convenient for leading in gas, and the arrangement of the sealing plug 73 is combined, so that the tightness of the input ends of the hot through groove 14 and the cold through groove 15 is effectively improved.
The outer wall of the shell 1 is provided with a vacuum chuck wall 12, and the arrangement of the vacuum chuck wall 12 can effectively isolate the external temperature difference change, further effectively improve the temperature insulation performance of the shell 1, and effectively improve the high and low temperature resistance performance of the capacitance sensor 5.
The invention has simple structure, meets the normal use of the capacitance sensor 5 in high and low temperature states, has market prospect and is suitable for popularization.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (10)
1. The utility model provides a high low temperature resistant on-vehicle liquid hydrogen bottle capacitance sensor, includes casing (1) and capacitance sensor (5), its characterized in that: the sensor comprises a shell (1), wherein a mounting groove (13) matched with a capacitance sensor (5) is formed in the shell (1), the capacitance sensor (5) is fixed in the mounting groove (13), a hot through groove (14) and a cold through groove (15) are formed in the outer wall of the shell (1), the output ends of the hot through groove (14) and the cold through groove (15) are communicated with the mounting groove (13), an annular sliding groove (16) is formed in the shell (1), the input ends of the hot through groove (14) and the cold through groove (15) are communicated with the annular sliding groove (16), a sliding ring (7) is connected in the annular sliding groove (16) in a sliding mode, the sliding direction of the sliding ring (7) is the axial direction of the annular sliding groove (16), a plurality of supporting columns (72) are uniformly distributed on one side of the inner wall of the annular sliding groove (16) at equal angles, grooves matched with the supporting columns (72) are formed in the sliding ring (7), be fixed with gasbag (71) between recess and support column (72), gasbag (71) intussuseption is filled with high thermal expansion coefficient gas, the outer wall of casing (1) is the equal angle equipartition and is equipped with a plurality of through-holes (11) that are linked together with annular spout (16), it is equipped with annular pipe (6) to lead to between groove (14) and cold groove (15) to heat, separate into two airtight appearance chambeies through the baffle in annular pipe (6), all be equipped with the filling liquid in the airtight appearance chamber, the filling liquid is high specific heat capacity liquid, one side that groove (14) and cold groove (15) are led to heat all is fixed with heat conduction fin (4) near annular pipe (6).
2. The capacitive sensor for the vehicle-mounted liquid hydrogen cylinder resistant to high and low temperatures according to claim 1, wherein: capacitive sensor (5) are equipped with the bowl shape cavity including two relative glass layers (52) that set up, between two relative glass layers (52), the bonding of bowl shape cavity inner wall has the metallic film, two the double-layered joint has detection membrane (53) between glass layer (52), is close to mounting groove (13) be equipped with inspection hole (51) on glass layer (52), it has ripple barrier film (54) to glue joint on inspection hole (51).
3. The capacitive sensor for the vehicle-mounted liquid hydrogen cylinder resistant to high and low temperatures according to claim 2, wherein: the metal film and the detection film (53) are all connected through the terminal (2), the terminal (2) is fixed on one side of the shell (1), the outer wall of the terminal (2) is provided with a thread structure, the terminal (2) is provided with a sealing nut (3) matched with the thread structure, the terminal (2) is fixed on a bottle valve of the vehicle-mounted liquid hydrogen bottle through the sealing nut (3), and the shell (1) is arranged on the inner side of the valve of the vehicle-mounted liquid hydrogen bottle.
4. The capacitive sensor for the vehicle-mounted liquid hydrogen cylinder resistant to high and low temperatures according to claim 1, wherein: the inner side of a ring body of the sliding ring (7) is provided with two groups of sealing plugs (73), the sealing plugs (73) are elastic high-low temperature resistant rubber structures, and the distance between the two groups of sealing plugs (73) is equal to the distance between the input ends of the hot through groove (14) and the cold through groove (15).
5. The capacitive sensor for the vehicle-mounted liquid hydrogen cylinder resistant to high and low temperatures according to claim 1, wherein: and a leading-in groove (74) is arranged on the outer side of the ring body of the slip ring (7).
6. The capacitive sensor for the vehicle-mounted liquid hydrogen cylinder resistant to high and low temperatures according to claim 1, wherein: the filling liquid in the closed containing cavity close to the cold through groove (15) is mercury.
7. The capacitive sensor for the vehicle-mounted liquid hydrogen cylinder resistant to high and low temperatures according to claim 1, wherein: and the filling liquid in the closed containing cavity close to the hot through groove (14) is liquid ammonia.
8. The capacitive sensor for the vehicle-mounted liquid hydrogen cylinder resistant to high and low temperatures according to claim 1, wherein: two sets of heat conduction fin (4) are copper structure, heat conduction fin (4) all extend to corresponding airtight holding intracavity.
9. The capacitive sensor for the vehicle-mounted liquid hydrogen cylinder resistant to high and low temperatures according to claim 1, wherein: the outer wall of the shell (1) is provided with a vacuum chuck wall (12).
10. The capacitive sensor for the vehicle-mounted liquid hydrogen cylinder resistant to high and low temperatures according to claim 1, wherein: the gas with high thermal expansion coefficient is carbon dioxide gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111248030.0A CN113959627A (en) | 2021-10-26 | 2021-10-26 | High and low temperature resistant vehicle-mounted liquid hydrogen cylinder capacitance sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111248030.0A CN113959627A (en) | 2021-10-26 | 2021-10-26 | High and low temperature resistant vehicle-mounted liquid hydrogen cylinder capacitance sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113959627A true CN113959627A (en) | 2022-01-21 |
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ID=79467070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111248030.0A Pending CN113959627A (en) | 2021-10-26 | 2021-10-26 | High and low temperature resistant vehicle-mounted liquid hydrogen cylinder capacitance sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113959627A (en) |
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2021
- 2021-10-26 CN CN202111248030.0A patent/CN113959627A/en active Pending
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