CN105737934A - Sodium liquid level detection device - Google Patents
Sodium liquid level detection device Download PDFInfo
- Publication number
- CN105737934A CN105737934A CN201610095707.4A CN201610095707A CN105737934A CN 105737934 A CN105737934 A CN 105737934A CN 201610095707 A CN201610095707 A CN 201610095707A CN 105737934 A CN105737934 A CN 105737934A
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- China
- Prior art keywords
- liquid level
- sodium liquid
- bobbin
- coil
- detection device
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/40—Investigating fluid-tightness of structures by using electric means, e.g. by observing electric discharges
Abstract
The invention relates to the field of liquid level detection, in particular to a sodium liquid level detection device. The sodium liquid level detection device comprises a sodium liquid level sensor and a signal processor electrically connected with the sodium liquid level sensor. The sodium liquid level sensor comprises a protective sleeve arranged in sodium liquid, a winding framework arranged in the protective sleeve, a primary coil, an induction coil and a complementary coil, and the primary coil, the induction coil and the complementary coil are coaxially wound on the winding framework and cover the whole range of the sodium liquid level sensor. The detection device has the advantages that background signals are low, sensitivity is high, stability is good, no measurement blind areas exists, and safety is high.
Description
Technical field
The invention belongs to Level Detection field, in particular to a kind of sodium liquid level detection device.
Background technology
Fast neutron reactor (abbreviation " fast reactor ") is main force's heap-type of forth generation Advanced Nuclear Energy Systems in the world, and liquid metal sodium becomes the coolant of fast reactor with its excellent thermal characteristics, for being taken away from reactor core by heat.Accurately must know Liquid Sodium liquid level in many containers (such as primary tank, surge tank, expansion drum etc.) in real time, thus ensureing the properly functioning of reactor.
Currently, generally utilizing the principle of electromagnetic induction to adopt the sensor construction of two coils (primary coil, induction coil) for on-line checking sodium liquid level both at home and abroad, its shortcoming is that background signal is big, sensitivity is low, poor stability.Also there is the sensor construction disclosing three-winding for on-line checking sodium liquid level: excitation coil (primary coil) covers full ranging, induction coil is arranged on ranging top and bucking coil is arranged on ranging bottom.Although the background signal of this technical scheme, sensitivity and stability compare the bigger improvement that has of two coils, but shortcoming is to there is measurement blind area namely to measure the sodium liquid level being positioned at bucking coil interval, thus having potential safety hazard.
Summary of the invention
It is an object of the invention to provide a kind of sodium liquid level detection device, intend to solve that existing two coil pickoff background signals are big, sensitivity is low, poor stability and three-winding sensor exist technical problems such as measuring blind area.
For this; the invention provides a kind of sodium liquid level detection device; including sodium liquid level sensor and the signal processor that is connected electrically; described sodium liquid level sensor includes the protection sleeve pipe being placed in sodium liquid, the bobbin being arranged in described protection sleeve pipe, and is coaxially wound on described bobbin and all covers the primary coil of the described full ranging of sodium liquid level sensor, induction coil and bucking coil.
Further, described bucking coil is smaller than the described induction coil spacing to described primary coil to described primary coil, and the number of turn of bucking coil is less than the number of turn of induction coil.
Further, described bobbin includes the internal layer bobbin and the outer layer bobbin that are coaxially disposed, wherein, described primary coil and described bucking coil helically coiling in parallel to each other are on described internal layer bobbin, and described induction coil helically coiling is on described outer layer bobbin.
Further, described bobbin includes the internal layer bobbin, middle level bobbin and the outer layer bobbin that are coaxially disposed, wherein, described bucking coil helically coiling is on described internal layer bobbin, described primary coil helically coiling is on the bobbin of described middle level, and described induction coil helically coiling is on described outer layer bobbin.
Further, described sodium liquid level sensor also includes and the temperature sensor of signal processing mechatronics.
Further, described temperature sensor is thermocouple.
Further, described sodium liquid level sensor also includes and the metal probe of signal processing mechatronics, is used for measuring whether sodium liquid leaks in protection sleeve pipe.
In the sodium liquid level detection device that the embodiment of the present invention provides, sodium liquid level sensor adopts and all covers the structure of the primary coil of its full ranging, induction coil and bucking coil, has that background signal is low, highly sensitive and good stability and be absent from measuring the beneficial effect of blind area and potential safety hazard.
For making the above-mentioned purpose of the present invention, feature and advantage to become apparent, preferred embodiment cited below particularly, and coordinate appended accompanying drawing, it is described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, the accompanying drawing used required in embodiment will be briefly described below, it is to be understood that, the following drawings illustrate only certain embodiments of the present invention, therefore the restriction to scope it is not construed as, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other relevant accompanying drawings according to these accompanying drawings.
Fig. 1 illustrates a kind of sodium liquid level detection device schematic diagram of the present invention；
Fig. 2 illustrates the sodium liquid level sensor structural representation in the embodiment of the present invention one；
Fig. 3 illustrates the sodium liquid level sensor structural representation in the embodiment of the present invention two.
Detailed description of the invention
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Therefore, below the detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit claimed the scope of the present invention, but is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, the every other embodiment that those skilled in the art obtain under the premise not making creative work, broadly fall into the scope of protection of the invention.
Referring to Fig. 1; embodiments provide a kind of sodium liquid level detection device; including sodium liquid level sensor and the signal processor 3 that is connected electrically; wherein; sodium liquid level sensor includes the protection sleeve pipe 2 being placed in sodium liquid 1, the bobbin 6 being arranged in described protection sleeve pipe 2, and is coaxially wound on described bobbin 6 and all covers the primary coil 8 of the full ranging L of described sodium liquid level sensor, induction coil 9 and bucking coil 7.After induction coil 9 self-induced signal each with bucking coil 7 carries out difference operation in signal processor 3, reconvert becomes level value, and this can greatly reduce the variations in temperature impact on measuring signal, thus improving sensitivity and the stability of measurement.Additionally, the winding length of primary coil 8, induction coil 9 and bucking coil 7 all covers the full ranging L of sodium liquid level sensor, thus being absent from measuring blind area, safety is high.
In order to be illustrated more clearly that technical scheme, further illustrate below by two embodiments.
Embodiment one
As shown in Figure 2, the bobbin 6 of sodium liquid level sensor includes coaxial internal layer bobbin 602 and outer layer bobbin 601, primary coil 901 and bucking coil 701 helically coiling in parallel to each other are on internal layer bobbin 602, induction coil 801 helically coiling is on outer layer bobbin 601, the spacing d1 of bucking coil 701 to primary coil 901 is less than the spacing d2 of induction coil 801 to primary coil 901, and the number of turn of bucking coil 701 is less than the number of turn of induction coil 801.On the one hand, owing to the spacing d1 of bucking coil 701 to primary coil 901 is less than the spacing d2 of induction coil 801 to primary coil 901, thus reduce primary coil 901 reasons for its use signal in induction coil 801, just can offset primary coil 901 reasons for its use signal in the induction coil 801 that the number of turn is more with the bucking coil 701 that the number of turn is less；On the other hand, owing to the distance of bucking coil 701 to sodium liquid 1 is more than the distance of induction coil 801 to sodium liquid 1, the useful signal that the useful signal that the vortex flow that primary coil 901 produces in sodium liquid 1 produces in the less bucking coil of the number of turn 701 produces in the induction coil 801 that the number of turn is more much smaller than this vortex flow, thus, bucking coil 701 is offsetting primary coil in induction coil 801 while reasons for its use signal, weakening of the useful signal that vortex flow in sodium liquid 1 produces in induction coil is very micro-, thus improving sensitivity and the stability of measurement.
Embodiment two
As shown in Figure 3, the bobbin 6 of sodium liquid level sensor includes coaxial internal layer bobbin 613, middle level bobbin 612 and outer layer bobbin 611, wherein bucking coil 711 helically coiling is on internal layer bobbin 613, primary coil 911 helically coiling is on middle level bobbin 612, induction coil 811 helically coiling is on outer layer bobbin 611, the spacing d1 of bucking coil 701 to primary coil 901 is less than the spacing d2 of induction coil 801 to primary coil 901, and the number of turn of bucking coil 701 is less than the number of turn of induction coil 801.In this embodiment, result measured by sodium liquid level sensor also has that background signal is low, highly sensitive and the effect of good stability, and its measured background signal is similar with embodiment one with induced signal principle, no longer describes herein.
As the further improvement of technique scheme, sodium liquid level sensor of the present invention also includes the temperature sensor 4 electrically connected with signal processor 3, for measuring the temperature in sodium liquid level sensor.Thus reducing the variations in temperature impact on sodium liquid level sensor coil further, improve the stability measured.Further, this temperature sensor 4 is preferably thermocouple.
The same further improvement as technique scheme; sodium liquid level sensor of the present invention also includes the metal probe 5 electrically connected with signal processor 3; for measuring whether sodium liquid leaks in protection sleeve pipe; namely when sodium liquid 1 leaks in protection sleeve pipe 2; metal probe 5 contacts with sodium liquid 1; closing of circuit, thus exporting leakage alarm.
Based on the attribute of sodium liquid high conductivity, the present invention can be additionally used in the detection of other high conductivity material level.
The above; being only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with scope of the claims.
Claims (7)
1. a sodium liquid level detection device; it is characterized in that; including sodium liquid level sensor and the signal processor that is connected electrically; described sodium liquid level sensor includes the protection sleeve pipe being placed in sodium liquid, the bobbin being arranged in described protection sleeve pipe, and is coaxially wound on described bobbin and all covers the primary coil of the described full ranging of sodium liquid level sensor, induction coil and bucking coil.
2. sodium liquid level detection device according to claim 1, it is characterised in that described bucking coil is smaller than the described induction coil spacing to described primary coil to described primary coil, and the number of turn of described bucking coil is less than the number of turn of induction coil.
3. sodium liquid level detection device according to claim 1 and 2, it is characterized in that, described bobbin includes the internal layer bobbin and the outer layer bobbin that are coaxially disposed, wherein, described primary coil and described bucking coil helically coiling in parallel to each other are on described internal layer bobbin, and described induction coil helically coiling is on described outer layer bobbin.
4. sodium liquid level detection device according to claim 1 and 2, it is characterized in that, described bobbin includes the internal layer bobbin, middle level bobbin and the outer layer bobbin that are coaxially disposed, wherein, described bucking coil helically coiling is on described internal layer bobbin, described primary coil helically coiling is on the bobbin of described middle level, and described induction coil helically coiling is on described outer layer bobbin.
5. sodium liquid level detection device according to claim 1, it is characterised in that described sodium liquid level sensor also includes and the temperature sensor of signal processing mechatronics.
6. sodium liquid level detection device according to claim 5, it is characterised in that described temperature sensor is thermocouple.
7., according to the arbitrary described sodium liquid level detection device of claim 1,2,5,6, it is characterised in that described sodium liquid level sensor also includes and the metal probe of signal processing mechatronics, it is used for measuring whether sodium liquid leaks in protection sleeve pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095707.4A CN105737934B (en) | 2016-02-22 | 2016-02-22 | A kind of sodium liquid level detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095707.4A CN105737934B (en) | 2016-02-22 | 2016-02-22 | A kind of sodium liquid level detection device |
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| CN105737934A true CN105737934A (en) | 2016-07-06 |
| CN105737934B CN105737934B (en) | 2019-02-15 |
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| CN201610095707.4A Active CN105737934B (en) | 2016-02-22 | 2016-02-22 | A kind of sodium liquid level detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679764A (en) * | 2017-02-10 | 2017-05-17 | 衡阳镭目科技有限责任公司 | Conductive liquid level detecting device |
| CN115468624A (en) * | 2022-09-21 | 2022-12-13 | 中国电子科技集团公司第四十九研究所 | Continuous high-temperature liquid metal liquid level sensor and preparation method of sensitive core thereof |
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2016
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2210297A1 (en) * | 1972-03-03 | 1973-09-06 | Interatom | CONTINUOUS LEVEL METER FOR ELECTRICALLY CONDUCTIVE LIQUIDS |
| GB2012431A (en) * | 1977-08-17 | 1979-07-25 | Hayter J E | Electromagnetic Position Transducer Uses Eddy Currents Induced in Conductive Member |
| US4567435A (en) * | 1983-03-09 | 1986-01-28 | Nippon Kokan Kabushiki Kaisha | Method and apparatus for continuously measuring distance utilizing eddy current and having temperature difference influence elimination |
| JPH06137921A (en) * | 1992-10-26 | 1994-05-20 | Nippon Steel Corp | Method for detecting molten metal level |
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| CN106679764A (en) * | 2017-02-10 | 2017-05-17 | 衡阳镭目科技有限责任公司 | Conductive liquid level detecting device |
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| CN115468624B (en) * | 2022-09-21 | 2023-09-29 | 中国电子科技集团公司第四十九研究所 | Continuous high-temperature liquid metal liquid level sensor and preparation method of sensitive core thereof |
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| CN105737934B (en) | 2019-02-15 |
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Effective date of registration: 20190826 Address after: 102400 No. 1 Sanqiang Road, Xinzhen, Fangshan District, Beijing Patentee after: China Institute of Atomic Energy Address before: 421001 Hunan Province, Hengyang Zhengxiang District Furong Road No. 21 Patentee before: Hengyang Ramon Science & Technology Co., Ltd. |
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