CN105717545A - Device for monitoring whether liquid metal exists in pipeline - Google Patents
Device for monitoring whether liquid metal exists in pipeline Download PDFInfo
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- CN105717545A CN105717545A CN201610095021.5A CN201610095021A CN105717545A CN 105717545 A CN105717545 A CN 105717545A CN 201610095021 A CN201610095021 A CN 201610095021A CN 105717545 A CN105717545 A CN 105717545A
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- Prior art keywords
- pipeline
- coil
- liquid metal
- eddy current
- current sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
Abstract
The invention provides a device for monitoring whether liquid metal exists in a pipeline. The device for monitoring whether the liquid metal exists in the pipeline is used for solving the problem that the installation and maintenance of an existing monitoring device are difficult, the measuring sensitivity is low, the stability is low and the mass production is difficult to realize. The device for monitoring whether the liquid metal exists in the pipeline comprises a fixed plate, an eddy current sensor and a signal processor. The fixed plate is installed on the pipeline through fasteners. The eddy current sensor is installed on the fixed plate. The axis of the eddy current sensor is perpendicular to the axis of the pipeline. The eddy current sensor comprises a housing and a winding framework installed in the housing. A primary coil, a sensing coil and a compensating coil are coaxially wound on the winding framework. The signal processor is in electric connection with the eddy current sensor. The device for monitoring whether the liquid metal exists in the pipeline is used for monitoring whether the liquid metal exists in the pipeline.
Description
Technical field
The present invention relates to liquid metal monitoring technical field, especially relate to a kind of device monitored and whether there is liquid metal in pipeline.
Background technology
Electromagnetic pump driven liquid metal heat transfer is a kind of efficient heat transfer mode, can be used for the numerous areas such as nuclear reactor, chip cooling technique, aircraft active cooling.Such as, at present, the 4th generation of technology such as nuclear energy system Liquid Sodium cools down installs electromagnetic pump on some sodium loops of fast shut-down system, however, it is necessary to ensure that being full of in Liquid Sodium situation at the sodium channel installing electromagnetic pump could allow to start electromagnetic pump, otherwise will burn electromagnetic pump.Monitoring device is generally installed on electromagnetic pump exit normal sodium channel, to monitor in pipeline whether be full of Liquid Sodium.
Currently, whether there is the monitoring device of liquid metal in monitoring pipeline to be mainly made up of differential type mutual inductor primary transducer, secondary meter and the corresponding cable that connects, utilize the principle of coil mutual inductance and eddy current effect realizes being monitored whether there is liquid metal in pipeline.Its shortcoming one is that the mutual inductor of primary transducer is wound on pipeline (namely sensor and pipeline are integrated), installs, difficult in maintenance；Two is mutual inductor is two loop constructions, and background signal is big, measures that sensitivity is low and poor stability；Three is that primary transducer is difficult to mass production because there being the pipeline of multiple caliber to need monitoring.
Summary of the invention
It is an object of the invention to provide a kind of device monitored and whether there is liquid metal in pipeline, to solve existing monitoring device and install, difficult in maintenance, measure that sensitivity is low, poor stability and be difficult to the technical problems such as mass production.
For reaching above-mentioned purpose, the embodiment of the present invention by the following technical solutions:
A kind of monitor the device that whether there is liquid metal in pipeline, including:
Fixing plate, is installed on pipeline by securing member；
Eddy current sensor, is installed on described fixing plate, and the axis of described eddy current sensor is perpendicular with conduit axis；The bobbin that described eddy current sensor includes housing, is installed in described housing, described bobbin is coaxially wound with primary coil, induction coil and bucking coil；
Signal processor, electrically connects with described eddy current sensor.
Further improvement as technique scheme, on described bobbin, from pipeline by near to induction coil, described primary coil, described bucking coil described in remote coiling successively, and, described induction coil and the asymmetric both sides being wound on described primary coil of described bucking coil.
Further, the spacing being smaller than between described induction coil and described primary coil between described bucking coil and described primary coil.
Further improvement as technique scheme, on described bobbin, from pipeline by near to induction coil, described bucking coil, described primary coil described in remote coiling successively, and, described induction coil and the asymmetric side being wound on described primary coil of described bucking coil.
As the further improvement of technique scheme, the number of turn of described bucking coil is less than the number of turn of described induction coil.
As the further improvement of technique scheme, described fixing plate is C template, and described securing member includes two mutually isostructural anchor ears, and the two ends of described C template are connected by two described anchor ears are fixing with pipeline outer wall；The center of described C template offers fixed interface, and described eddy current sensor is located in described fixed interface.
As the further improvement of technique scheme, described eddy current sensor being equiped with temperature sensor, described signal processor electrically connects with described temperature sensor.
Further, described temperature sensor is thermocouple.
Embodiments provide a kind of device monitored and whether there is liquid metal in pipeline, adopt modular eddy current sensor structure, by fixing plate, eddy current sensor is fixed on outside pipeline, namely eddy current sensor is made to separate with pipeline, not only install, easy to maintenance, the Monitoring Pinpelines of different bore can also be adapted to, it may be achieved mass production；Additionally, the coil of eddy current sensor adopts coaxial three-winding winding method, it is possible to decrease background signal, and then reach to put forward the purpose of high measurement sensitivity and stability.
For making the above-mentioned purpose of the present invention, feature and advantage to become apparent, preferred embodiment cited below particularly, and coordinate affiliated accompanying drawing, it is described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, the accompanying drawing used required in detailed description of the invention or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
A kind of structural representation one monitoring the device that whether there is liquid metal in pipeline that Fig. 1 provides for the embodiment of the present invention；
A kind of structural representation two monitoring the device that whether there is liquid metal in pipeline that Fig. 2 provides for the embodiment of the present invention.
Accompanying drawing labelling:
1-pipeline, 2-fixes plate, 3-securing member, 4-eddy current sensor, 5-signal processor, 6-temperature sensor；
41-housing, 42-bobbin, 43-primary coil, 44-induction coil, 45-bucking coil.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
In describing the invention, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship; be for only for ease of the description present invention and simplifying and describe; rather than instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.Additionally, term " first ", " second ", " the 3rd " are only for descriptive purposes, and it is not intended that indicate or hint relative importance.
Embodiment one
A kind of structural representation one monitoring the device that whether there is liquid metal in pipeline that Fig. 1 provides for the embodiment of the present invention, a kind of structural representation two monitoring the device that whether there is liquid metal in pipeline that Fig. 2 provides for the embodiment of the present invention, referring to Fig. 1 and Fig. 2, the device that whether there is liquid metal in described monitoring pipeline includes:
Fixing plate 2, is installed on pipeline 1 by securing member 3；
Eddy current sensor 4, is installed on described fixing plate 2, the axis of described eddy current sensor 4 and pipeline 1 axis perpendicular；The bobbin 42 that described eddy current sensor 4 includes housing 41, is installed in described housing 41, described bobbin 42 is coaxially wound with primary coil 43, induction coil 44 and bucking coil 45；
Signal processor 5, electrically connects with described eddy current sensor 4.
The embodiment of the present invention one provides the device that whether there is liquid metal in monitoring pipeline, adopt modular eddy current sensor structure, by fixing plate, eddy current sensor is fixed on outside pipeline, namely eddy current sensor is made to separate with pipeline, not only install, easy to maintenance, the Monitoring Pinpelines of different bore can also be adapted to, it may be achieved mass production；Additionally, the coil of eddy current sensor adopts coaxial three-winding winding method, it is possible to decrease background signal, and then reach to put forward the purpose of high measurement sensitivity and stability.
Embodiment two
A kind of structural representation one monitoring the device that whether there is liquid metal in pipeline that Fig. 1 provides for the embodiment of the present invention, a kind of structural representation two monitoring the device that whether there is liquid metal in pipeline that Fig. 2 provides for the embodiment of the present invention, please continue to refer to Fig. 1 and Fig. 2, the device that whether there is liquid metal in described monitoring pipeline includes:
Fixing plate 2, is installed on pipeline 1 by securing member 3；
Eddy current sensor 4, is installed on described fixing plate 2, the axis of described eddy current sensor 4 and pipeline 1 axis perpendicular；The bobbin 42 that described eddy current sensor 4 includes housing 41, is installed in described housing 41, described bobbin 42 is coaxially wound with primary coil 43, induction coil 44 and bucking coil 45；
Signal processor 5, electrically connects with described eddy current sensor 4.
Further, on described bobbin 42, from pipeline 1 by near to induction coil 44, described primary coil 43, described bucking coil 45 described in remote coiling successively, and, described induction coil 44 and the asymmetric both sides being wound on described primary coil 43 of described bucking coil 45, the number of turn of described bucking coil 45 is less than the number of turn of described induction coil 44.
Specifically, above-mentioned asymmetric winding method is preferably: the spacing being smaller than between described induction coil 44 and described primary coil 43 between described bucking coil 45 and described primary coil 43.
The device of liquid metal whether is there is in the monitoring pipeline that the embodiment of the present invention two provides, due to the spacing being smaller than between induction coil and primary coil between bucking coil and primary coil, thus reducing background signal, improve measurement sensitivity and stability.Specifically, spacing between primary coil and induction coil is more than primary coil and to the spacing between bucking coil, primary coil reasons for its use signal in induction coil is minimized, and just can offset primary coil reasons for its use signal in the induction coil that the number of turn is more with the less bucking coil of the number of turn；After primary coil produces vortex flow in liquid metal, owing to the distance of bucking coil to liquid metal is more than the distance of induction coil to liquid metal, the signal that this vortex flow produces in the less bucking coil of the number of turn, much smaller than the signal that this vortex flow produces in the induction coil that the number of turn is more, therefore, bucking coil is offsetting primary coil in induction coil while reasons for its use signal, weakening of the useful signal that vortex flow in liquid metal produces in induction coil is very micro-, and then, the coil of eddy current sensor adopts coaxial three-winding winding method, background signal can be reduced, reach to put forward the purpose of high measurement sensitivity and stability.It addition, adopt modular eddy current sensor structure, by fixing plate, eddy current sensor is fixed on outside pipeline, namely eddy current sensor is made to separate with pipeline, not only install, easy to maintenance, moreover it is possible to be adapted to the Monitoring Pinpelines of different bore, it may be achieved mass production.
Embodiment three
A kind of structural representation one monitoring the device that whether there is liquid metal in pipeline that Fig. 1 provides for the embodiment of the present invention, please continue to refer to Fig. 1, the device that whether there is liquid metal in described monitoring pipeline includes:
Fixing plate 2, is installed on pipeline 1 by securing member 3；
Eddy current sensor 4, is installed on described fixing plate 2, the axis of described eddy current sensor 4 and pipeline 1 axis perpendicular；The bobbin that described eddy current sensor 4 includes housing, is installed in described housing, described bobbin is coaxially wound with primary coil, induction coil and bucking coil；
Signal processor 5, electrically connects with described eddy current sensor 4.
Further, on described bobbin, from pipeline by near to induction coil, described bucking coil, described primary coil described in remote coiling successively, and, described induction coil and the asymmetric side being wound on described primary coil of described bucking coil, the number of turn of described bucking coil is less than the number of turn of described induction coil.
Specifically, namely above-mentioned asymmetric winding method refers to: the spacing being smaller than between described induction coil and described primary coil between described bucking coil and described primary coil, this characteristic by induction coil, bucking coil, primary coil overall alignment mode determine.
The device of liquid metal whether is there is in the monitoring pipeline that the embodiment of the present invention three provides, due to the spacing being smaller than between induction coil and primary coil between bucking coil and primary coil, thus reducing background signal, improve measurement sensitivity and stability.Specifically, spacing between primary coil and induction coil is more than primary coil and to the spacing between bucking coil, primary coil reasons for its use signal in induction coil is minimized, and just can offset primary coil reasons for its use signal in the induction coil that the number of turn is more with the less bucking coil of the number of turn；After primary coil produces vortex flow in liquid metal, owing to the distance of bucking coil to liquid metal is more than the distance of induction coil to liquid metal, the signal that this vortex flow produces in the less bucking coil of the number of turn, much smaller than the signal that this vortex flow produces in the induction coil that the number of turn is more, therefore, bucking coil is offsetting primary coil in induction coil while reasons for its use signal, weakening of the useful signal that vortex flow in liquid metal produces in induction coil is very micro-, and then, the coil of eddy current sensor adopts coaxial three-winding winding method, background signal can be reduced, reach to put forward the purpose of high measurement sensitivity and stability.It addition, adopt modular eddy current sensor structure, by fixing plate, eddy current sensor is fixed on outside pipeline, namely eddy current sensor is made to separate with pipeline, not only install, easy to maintenance, moreover it is possible to be adapted to the Monitoring Pinpelines of different bore, it may be achieved mass production.
In above three embodiment, specifically, described fixing plate 2 is C template, and described securing member 3 includes two mutually isostructural anchor ears, and the two ends of described C template are connected by two described anchor ears are fixing with pipeline outer wall；The center of described C template offers fixed interface, described eddy current sensor 4 is located in described fixed interface, namely modular eddy current sensor structure is adopted, by fixing plate, eddy current sensor is fixed on outside pipeline, namely eddy current sensor is made to separate with pipeline, not only install, easy to maintenance, moreover it is possible to be adapted to the Monitoring Pinpelines of different bore, it may be achieved mass production.
It addition, above-mentioned fixing plate and securing member also serve to ensure that when installing eddy current sensor every time, the relative position of eddy current sensor and pipeline remains unchanged, thus the installation site impact on measuring signal can be reduced.
Shown in Fig. 2, for reducing the variations in temperature impact on eddy current sensor coil further, to improve the stability measured, in above three embodiment, described eddy current sensor being equiped with temperature sensor, described signal processor electrically connects with described temperature sensor, for measuring the temperature in eddy current sensor, being further compensate for the temperature impact on eddy current sensor coil, improve the stability measured, this temperature sensor is preferably thermocouple.
The present invention can be used for nuclear reactor, chip cooling technique, aircraft active cooling etc. many utilize liquid metal conduct heat cooling field, described liquid metal can be alloys such as Liquid Sodium, liquid potassium, liquid state Na-K alloy, liquid gallium, liquid gallium stannum etc.；Can also be used for chemical industry, printing industry, to the monitoring that whether there are the toxic heavy metals such as liquid lead in pipeline；Can be additionally used in casting industry, to the monitoring of transporting molten non-ferrous metal in pipeline.
In describing the invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or connect integratedly；Can be mechanically connected, it is also possible to be electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be the connection of two element internals.For the ordinary skill in the art, it is possible to concrete condition understands above-mentioned term concrete meaning in the present invention.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (8)
1. monitor the device that whether there is liquid metal in pipeline for one kind, it is characterised in that including:
Fixing plate, is installed on pipeline by securing member；
Eddy current sensor, is installed on described fixing plate, and the axis of described eddy current sensor is perpendicular with conduit axis；The bobbin that described eddy current sensor includes housing, is installed in described housing, described bobbin is coaxially wound with primary coil, induction coil and bucking coil；
Signal processor, electrically connects with described eddy current sensor.
2. according to claim 1 a kind of monitor the device that whether there is liquid metal in pipeline, it is characterised in that on described bobbin, from pipeline by near to induction coil, described primary coil, described bucking coil described in remote coiling successively, and,
Described induction coil and the asymmetric both sides being wound on described primary coil of described bucking coil.
3. according to claim 2 a kind of monitor the device that whether there is liquid metal in pipeline, it is characterised in that the spacing being smaller than between described induction coil and described primary coil between described bucking coil and described primary coil.
4. according to claim 1 a kind of monitor the device that whether there is liquid metal in pipeline, it is characterised in that on described bobbin, from pipeline by near to induction coil, described bucking coil, described primary coil described in remote coiling successively, and,
Described induction coil and the asymmetric side being wound on described primary coil of described bucking coil.
5. a kind of according to claim 3 or 4 monitors the device that whether there is liquid metal in pipeline, it is characterised in that the number of turn of described bucking coil is less than the number of turn of described induction coil.
6. according to claim 1 a kind of monitor the device that whether there is liquid metal in pipeline, it is characterized in that, described fixing plate is C template, and described securing member includes two mutually isostructural anchor ears, and the two ends of described C template are connected by two described anchor ears are fixing with pipeline outer wall；
The center of described C template offers fixed interface, and described eddy current sensor is located in described fixed interface.
7. according to claim 1 a kind of monitor the device that whether there is liquid metal in pipeline, it is characterised in that being equiped with temperature sensor on described eddy current sensor, described signal processor electrically connects with described temperature sensor.
8. according to claim 7 a kind of monitor the device that whether there is liquid metal in pipeline, it is characterised in that described temperature sensor is thermocouple.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610095021.5A CN105717545B (en) | 2016-02-22 | 2016-02-22 | It whether there is the device of liquid metal in a kind of monitoring pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610095021.5A CN105717545B (en) | 2016-02-22 | 2016-02-22 | It whether there is the device of liquid metal in a kind of monitoring pipeline |
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| CN105717545A true CN105717545A (en) | 2016-06-29 |
| CN105717545B CN105717545B (en) | 2018-05-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024027542A1 (en) * | 2022-08-01 | 2024-02-08 | 中广核研究院有限公司 | Mutual-induction type liquid metal leakage monitoring apparatus and use thereof |
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| US4322982A (en) * | 1979-02-10 | 1982-04-06 | Kernforschungszentrum Karlsruhe Gmbh | Flowmeter |
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| WO2024027542A1 (en) * | 2022-08-01 | 2024-02-08 | 中广核研究院有限公司 | Mutual-induction type liquid metal leakage monitoring apparatus and use thereof |
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