CN202362049U - Dual concentric capacitive sensor for liquefied gas - Google Patents
Dual concentric capacitive sensor for liquefied gas Download PDFInfo
- Publication number
- CN202362049U CN202362049U CN2011204039394U CN201120403939U CN202362049U CN 202362049 U CN202362049 U CN 202362049U CN 2011204039394 U CN2011204039394 U CN 2011204039394U CN 201120403939 U CN201120403939 U CN 201120403939U CN 202362049 U CN202362049 U CN 202362049U
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- CN
- China
- Prior art keywords
- cylinder
- liquefied gas
- inner core
- urceolus
- middle tube
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Abstract
The utility model provides a dual concentric capacitive sensor for liquefied gas, which comprises a polytetrafluoroethylene cable, an outer cylinder and a middle cylinder. An inner cylinder is arranged in the middle cylinder, the inner cylinder is conductively connected with the outer cylinder, the middle cylinder is conductively connected with a core wire of the polytetrafluoroethylene cable, and gaps are reserved among the outer cylinder, the middle cylinder and the inner cylinder. When working, both the outer cylinder and the inner cylinder are in the same electric level, and a dual concentric capacitive structure is formed by the outer cylinder, the inner cylinder and the middle cylinder. By the aid of the structure, the measurement capacitance of the dual concentric capacitive sensor is approximately increased to be the double of that of a single concentric capacitive structure, so that capacitive incremental change caused by liquid level change is also approximately increased to be the double of that of the single concentric capacitive structure, measurement errors are reduced to be lower than 1%, and electromagnetic interference resistance is improved.
Description
Technical field
The utility model relates to a kind of liquefied gas and uses capacitive transducer, is mainly used in, the liquid level perception of liquid gas in the vacuum industry storage tank, is particularly useful for vehicle-mounted liquefied natural gas (LNG) (LNG) fuel tank.
Background technology
According to the direction of international energy development, adapt to the development strategy of China's clean energy resource, liquefied natural gas (LNG) (LNG) will become first-selected New-type fuel.Vehicle-mounted LNG fuel promotes large tracts of land to replace traditional gasoline or diesel fuel.Similar with the vehicle fuel table, the LNG fuel tank also needs the amount of liquefied gas in the fuel quantity ga(u)ge indication case.Being used to measure the capacitance level gauge of LNG liquid level at present, all is the single coaxial-type capacitive transducer that adopts, and its composition comprises fixed cover, cross plug, insulation supporting seat, brace, urceolus, inner core, following fixed cover, insulation support set, heart yearn.Single coaxial-type capacitive transducer adopts inner core and outer tube structure to form single electric capacity.Find in the practice that the measurement electric capacity that the single coaxial-type capacitive transducer of this structure forms is less than normal, causes low, the poor anti jamming capability of measuring accuracy, is difficult to satisfy request for utilization.
The utility model content
The purpose of the utility model is to provide a kind of can improve LNG fuel tank level gauging precision and the strong two coaxial capacitance sensors of liquefied gas usefulness of antijamming capability.
The utility model is for realizing that above-mentioned purpose adopts following technical scheme:
A kind of liquefied gas is with two coaxial capacitance sensors, and its composition comprises teflon cable, urceolus and middle tube, it is characterized in that: in middle tube, be provided with inner core, inner core is connected with the urceolus conduction.Middle tube is connected with teflon cable core conduction.Be provided with the gap between urceolus, middle tube, the inner core.
Tube and urceolus, inner core insulation in said.
Be provided with the insulation supporting seat between said inner core and the middle tube.
Tube is drawn as an electrode through the teflon cable core in said.
Said urceolus, middle tube, inner core both sides are provided with fixed cover and following fixed cover.
Said cross plug, urceolus, middle tube, inner core, last fixed cover and following fixed cover are metal material.
The beneficial effect of the utility model:
One, the utility model is drawn middle tube as an electrode through the teflon cable core; Urceolus and inner core are connected through cross plug conduction, and on the liquefied gas inwall that is welded on ground connection through the last fixed cover that links together with urceolus and following fixed cover as another electrode.Tube was gone respectively into electric capacity with urceolus, inner core during the two coaxial configurations of this kind made; Thereby under the situation that does not increase volume; Measurement electric capacity almost increases to 2 times of single coaxial capacitance structure; The capacitance increase variation that liquid level change causes also almost increases to 2 times, and good electric shield effect is provided simultaneously.
Two, the liquid level perceptual error is less than 1%, and Electro Magnetic Compatibility is good when driving, has significantly improved measuring accuracy and antijamming capability.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 1: tube in fixed cover on 1,2 welded tubes, 3 cross plugs, 4 insulation supporting seats, 5 braces, 6 urceolus, 7,8 inner cores, 9 times fixed covers, 10 insulate support sets, 11 heart yearns, 12 stop collars, 13 spacing rings, 14 teflon cables, 15 locating sleeves.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified:
A kind of liquefied gas is with two coaxial capacitance sensors, its composition comprise heart yearn, urceolus, middle tube, inner core, connection urceolus and inner core the cross plug, support in tin the insulation supporting seat, be connected heart yearn and inner core brace, be used to install and fix the last fixed cover and the following fixed cover of the utility model; Said urceolus, inner core and middle tube are coaxial and be provided with the gap therebetween.
Shown in accompanying drawing 1; The utility model comprises cable 14, urceolus 6, inner core 8 and link, and wherein, urceolus 6 is the coaxial metal pipe with inner core 8; Link comprises fixed cover 1, following fixed cover 9, welded tube 2, cross plug 3, stop collar 12, spacing ring 13, locating sleeve 15; The cross plug 3 of upper end is fixedly connected through welded tube 2 with last fixed cover 1, and the cross plug 3 of lower end is fixedly connected with following fixed cover 9, and cable 14 passes locating sleeve 15, spacing ring 13 respectively; Cable 14 foremost for removing the heart yearn 11 of crust, heart yearn 11 is spacing through stop collar 12.
Shown in accompanying drawing 1, tube 7 between urceolus 6 and inner core 8, also being equipped with, middle tube 7 are coaxial with urceolus 6 and inner core 8 but the mutual non-conductive metal tube that contacts; In conduct electricity through brace 5 between the heart yearn 11 of a tube end of 7 and cable 14 and be connected, this connected mode contact area is big, conductive capability is strong, thereby error is littler.The two ends of middle tube 7 are fixedly connected with cross plug 3 through insulation supporting seat 4 respectively.
Shown in accompanying drawing 1, in when work, the utility model lower end (i.e. right-hand member among the figure) downwards and immerse in the liquefied gas, urceolus 6 all is in identical level with inner core 8, one pair of coaxial capacitance structure in they and middle tube 7 formations.When the liquid level of liquefied gas raises; The capacitance that middle tube 7 perceives can increase; And the heart yearn through cable 14 11 passes to testing circuit with signal, reacts to the driver with the form of numeral or instrument after the testing circuit processing signals, thereby lets the driver know the liquid level change situation.
Through measuring; The blank pipe electric capacity of the utility model reaches about 700PF; Measurement electric capacity almost increases to 2 times of single coaxial capacitance structure, and the capacitance increase change that the LNG liquid level change causes can reach about 500PF, and the capacitance increase variation that liquid level change causes also almost increases to 2 times; The measuring liquid level error is less than 1%, and Electro Magnetic Compatibility is good when driving, has significantly improved measuring accuracy and antijamming capability.
The utility model liquefied gas has been widely used in vehicle-mounted LNG fuel tank level gauging with two coaxial capacitance sensors, in respect of DYQ-3, and DYQ-3B, LNG liquid level gauges such as DYQ-4 and DYQ-5.Liquefied gas is with the liquid level sensor of two coaxial capacitance sensors as these liquid level gauges, and measuring accuracy all is superior to 1%, and anti-interference is good.Promoted the use of cover more than 10,000 at present.
Claims (5)
1. a liquefied gas is with two coaxial capacitance sensors; Its composition comprises teflon cable, urceolus and middle tube; It is characterized in that: in middle tube, be provided with inner core; Inner core is connected with the urceolus conduction, and middle tube is connected with teflon cable core conduction, is provided with the gap between urceolus, middle tube, the inner core.
2. liquefied gas according to claim 1 is characterized in that with two coaxial capacitance sensors: tube and urceolus, inner core insulation in said.
3. liquefied gas according to claim 1 is characterized in that with two coaxial capacitance sensors: be provided with the insulation supporting seat between said inner core and the middle tube.
4. liquefied gas according to claim 1 is characterized in that with two coaxial capacitance sensors: tube is drawn as an electrode through the teflon cable core in said.
5. use two coaxial capacitance sensors according to the arbitrary described liquefied gas of claim 1-4, it is characterized in that: said urceolus, middle tube, inner core both sides are provided with fixed cover and following fixed cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204039394U CN202362049U (en) | 2011-10-21 | 2011-10-21 | Dual concentric capacitive sensor for liquefied gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204039394U CN202362049U (en) | 2011-10-21 | 2011-10-21 | Dual concentric capacitive sensor for liquefied gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202362049U true CN202362049U (en) | 2012-08-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204039394U Expired - Lifetime CN202362049U (en) | 2011-10-21 | 2011-10-21 | Dual concentric capacitive sensor for liquefied gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202362049U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798433A (en) * | 2012-08-20 | 2012-11-28 | 张家港保税区美达电子电脑有限公司 | Capacitance-type low-temperature liquid level sensor |
| CN103196037A (en) * | 2013-04-18 | 2013-07-10 | 苏州赛智达智能科技有限公司 | Internally integral primary-secondary capacitance type sensor |
| CN103216727A (en) * | 2013-04-18 | 2013-07-24 | 苏州赛智达智能科技有限公司 | Primary and secondary capacitance-type sensor with inner ring structure |
| CN103353325A (en) * | 2013-07-01 | 2013-10-16 | 苏州赛智达智能科技有限公司 | Three-tube capacitive type liquid level sensor capable of preventing short circuiting |
| CN106768171A (en) * | 2015-11-20 | 2017-05-31 | 北京航天试验技术研究所 | Deep cooling medium liquid level determining approach in space propultion |
| CN111867433A (en) * | 2018-03-16 | 2020-10-30 | 皮特科炸具股份有限公司 | Fluid top-up detection and control system |
-
2011
- 2011-10-21 CN CN2011204039394U patent/CN202362049U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798433A (en) * | 2012-08-20 | 2012-11-28 | 张家港保税区美达电子电脑有限公司 | Capacitance-type low-temperature liquid level sensor |
| CN103196037A (en) * | 2013-04-18 | 2013-07-10 | 苏州赛智达智能科技有限公司 | Internally integral primary-secondary capacitance type sensor |
| CN103216727A (en) * | 2013-04-18 | 2013-07-24 | 苏州赛智达智能科技有限公司 | Primary and secondary capacitance-type sensor with inner ring structure |
| CN103196037B (en) * | 2013-04-18 | 2015-04-08 | 苏州赛智达智能科技有限公司 | Internally integral primary-secondary capacitance type sensor |
| CN103353325A (en) * | 2013-07-01 | 2013-10-16 | 苏州赛智达智能科技有限公司 | Three-tube capacitive type liquid level sensor capable of preventing short circuiting |
| CN106768171A (en) * | 2015-11-20 | 2017-05-31 | 北京航天试验技术研究所 | Deep cooling medium liquid level determining approach in space propultion |
| CN111867433A (en) * | 2018-03-16 | 2020-10-30 | 皮特科炸具股份有限公司 | Fluid top-up detection and control system |
| CN111867433B (en) * | 2018-03-16 | 2023-07-18 | 皮特科炸具股份有限公司 | Fluid top-up detection and control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120801 |
|
| CX01 | Expiry of patent term |