CN105628137B - Sodium liquid level detection device - Google Patents
Sodium liquid level detection device Download PDFInfo
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- CN105628137B CN105628137B CN201610096511.7A CN201610096511A CN105628137B CN 105628137 B CN105628137 B CN 105628137B CN 201610096511 A CN201610096511 A CN 201610096511A CN 105628137 B CN105628137 B CN 105628137B
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- compensation
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- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 79
- 239000011734 sodium Substances 0.000 title claims abstract description 79
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims abstract description 76
- 239000007788 liquid Substances 0.000 title claims abstract description 70
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 230000006698 induction Effects 0.000 claims abstract description 53
- 230000001681 protective effect Effects 0.000 claims abstract description 33
- 230000004323 axial length Effects 0.000 claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 239000000523 sample Substances 0.000 claims description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 9
- 238000005259 measurement Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 14
- 230000007547 defect Effects 0.000 description 2
- 150000003385 sodium Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention relates to the technical field of liquid level measurement, in particular to a sodium liquid level sensor and a sodium liquid level detection device, wherein the sodium liquid level sensor comprises a protective sleeve, a first coil frame and a second coil frame; the first coil frame is sleeved outside the second coil frame, and the protective sleeve is sleeved outside the first coil frame; an induction coil is arranged on the first coil frame, and a primary coil and a compensation coil are arranged on the second coil frame; the axial length of the induction coil is equal to the axial effective length of the first coil former; the axial length of the primary coil is equal to the axial effective length of the second coil frame; the axial length of the compensation coil is equal to the axial effective length of the second coil former. The sodium liquid level detection device comprises a signal processor and the sodium liquid level sensor; the induction coil, the primary coil and the compensation coil are electrically connected with the signal processor respectively. The invention reduces the background signal, improves the sensitivity, has good stability, does not have a measuring blind area and has high safety.
Description
Technical Field
The invention relates to the technical field of liquid level measurement, in particular to a sodium liquid level detection device.
Background
The fast neutron reactor (short for "fast reactor") is a main reactor type of the fourth generation advanced nuclear energy system in the world, and liquid metal sodium becomes coolant of the fast reactor with excellent thermal characteristics and is used for taking away heat from a reactor core. During operation, the liquid level of the liquid sodium in the vessels (e.g., main vessel, buffer tank, expansion tank, etc.) must be known with accuracy to ensure proper operation of the reactor.
At present, the principle of electromagnetic induction is commonly used at home and abroad, a sensor structure of two coils (primary coil and induction coil) is adopted for detecting the sodium liquid level on line, and the defects of the sensor structure are that background signals are large, the sensitivity is low and the stability is poor. There is also a three-coil sensor for on-line detection of sodium level, which includes an excitation coil (primary coil) covering the full range, an induction coil disposed on the upper range portion and a compensation coil disposed on the lower range portion. Although the background signal, the sensitivity and the stability of the technical scheme are greatly improved compared with those of the two coils, the technical scheme has the defect that a measurement blind zone exists, namely the sodium liquid level in the interval of the compensation coil cannot be measured, so that the technical scheme has potential safety hazard.
Disclosure of Invention
The invention aims to provide a sodium liquid level detection device to solve the technical problems of large background signal, low sensitivity, poor stability and poor safety of a sensor for measuring the sodium liquid level in the prior art.
The invention provides a sodium liquid level sensor which comprises a protective sleeve, a first coil frame and a second coil frame, wherein the protective sleeve is arranged on the first coil frame; the first coil frame is sleeved outside the second coil frame, and the protective sleeve is sleeved outside the first coil frame; an induction coil is arranged on the first coil frame, and a primary coil and a compensation coil are arranged on the second coil frame; the axial length of the induction coil is equal to the axial effective length of the first coil former; the axial length of the primary coil is equal to the axial effective length of the second coil frame; the axial length of the compensation coil is equal to the axial effective length of the second coil former.
Optionally, the induction coil is helically wound in an axial direction of an outer surface of the first bobbin; the primary coil and the compensation coil are respectively spirally wound in an axial direction of an outer surface of the second bobbin; the primary coil and the compensation coil are arranged in a staggered mode; the helix angle of the primary coil is the same as the helix angle of the compensation coil.
Optionally, the induction coil is helically wound in an axial direction of an outer surface of the first bobbin; the second coil frame comprises a first sub-coil frame and a second sub-coil frame; the first sub-coil framework is sleeved outside the second sub-coil framework; the primary coil is spirally wound on the axial direction of the outer surface of the first sub-coil skeleton, and the compensation coil is spirally wound on the axial direction of the outer surface of the second sub-coil skeleton; and the axis of the first coil former, the axis of the first sub-coil former and the axis of the second sub-coil former are collinear.
Further, the radial spacing of the compensation coil from the primary coil is less than the radial spacing of the induction coil from the primary coil.
Further, the number of turns of the compensation coil is smaller than that of the induction coil.
Further, still include temperature sensor, temperature sensor sets up in protective sleeve.
Further, the temperature sensor is a thermocouple.
Further, the device also comprises a metal probe for detecting whether the sodium liquid leaks into the protective sleeve.
Further, the material of protective sleeve is stainless steel.
The invention also provides a sodium liquid level detection device, which comprises a signal processor and the sodium liquid level sensor; the induction coil, the primary coil and the compensation coil are electrically connected with the signal processor respectively.
Compared with the prior art, the invention has the beneficial effects that:
the sodium liquid level sensor provided by the invention comprises a protective sleeve, a first coil frame and a second coil frame; the first coil frame is sleeved outside the second coil frame, and the protective sleeve is sleeved outside the first coil frame; an induction coil is arranged on the first coil frame, and a primary coil and a compensation coil are arranged on the second coil frame; the axial length of the induction coil is equal to the axial effective length of the first coil former; the axial length of the primary coil is equal to the axial effective length of the second coil frame; the axial length of the compensation coil is equal to the axial effective length of the second coil former. The invention reduces the background signal, improves the sensitivity, has good stability, does not have a measuring blind area and has high safety.
The sodium liquid level detection device provided by the invention comprises a signal processor and the sodium liquid level sensor provided by the invention; the induction coil, the primary coil and the compensation coil are electrically connected with the signal processor respectively. According to the analysis, the sodium liquid level detection device provided by the invention has the advantages of low background signal reduction, high sensitivity, good stability, no measurement blind area and high safety.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a partial structure of a sodium level sensor according to an embodiment of the present invention;
FIG. 2 is a schematic view of a partial structure of a sodium level sensor according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a sodium liquid level detection device provided by the third embodiment of the present invention.
Reference numerals:
101-a protective sleeve; 102-a first bobbin; 103-a second coil former;
104-an induction coil; 105-a primary coil; 106-a compensation coil;
108-sodium liquid; 109-temperature sensor; 110-a metal probe;
111-a first sub-coil armature; 112-a second sub-coil armature; 113-signal processor.
It should be noted that, in fig. 1 and fig. 2, the temperature sensor and the metal probe are not shown, and these two components are shown in fig. 3, and in the first to third embodiments of the present invention, the same components are denoted by the same reference numerals, and reference is made to the description in the embodiment mode.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" 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," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 1, according to a first embodiment of the present invention, there is provided a sodium level sensor, including a protection sleeve 101, a first bobbin 102 and a second bobbin 103; the first coil frame 102 is sleeved outside the second coil frame 103, and the protective sleeve is sleeved outside the first coil frame 102; an induction coil 104 is arranged on the first coil frame, and a primary coil 105 and a compensation coil 106 are arranged on the second coil frame; the axial length of the induction coil is equal to the axial effective length L of the first coil former; the axial length of the primary coil is equal to the axial effective length of the second coil frame; the axial length of the compensation coil is equal to the axial effective length of the second coil former. The first bobbin and the second bobbin are both tubular. According to the sodium liquid level sensor provided by the first embodiment of the invention, the first coil frame and the second coil frame can be protected by adopting the protective sleeve, and the axial length of the induction coil is equal to the axial effective length of the first coil frame; the axial length of the primary coil is equal to the axial effective length of the second coil frame; the axial length of the compensation coil is equal to the axial effective length of the second coil rack, so that a measuring blind area does not exist, and the safety is high. This spatial arrangement of the primary coil 105, the induction coil 104 and the compensation coil 106 reduces the background signal low, increases the sensitivity high and has good stability.
In the first embodiment, the induction coil 104 is spirally wound in the axial direction of the outer surface of the first bobbin 102; the primary coil 105 and the compensation coil 106 are respectively spirally wound in the axial direction of the outer surface of the second bobbin 103; the primary coil and the compensation coil are arranged in a staggered manner; the pitch angle of the primary coil is the same as the pitch angle of the compensation coil, i.e. the direction of the length extension of the primary coil on the second coil former coincides with, i.e. is parallel to, the direction of the length extension of the compensation coil. Specifically, the axial effective length of the first coil form and the axial effective length of the second coil form refer to the length of a measuring section of the sodium liquid level sensor; the axis of the first bobbin and the axis of the second bobbin are collinear; the axial starting end of the induction coil, the axial starting end of the primary coil and the axial starting end of the compensation coil are flush.
In the first embodiment, the number of turns of the compensation coil is smaller than that of the induction coil. Thus, the compensation coil with less turns can cancel the background signal generated by the primary coil in the induction coil with more turns. In addition, because the radial distance from the compensating coil 106 to the sodium liquid 108 is greater than the radial distance from the induction coil 104 to the sodium liquid 108, the electromagnetic signal generated by the eddy current generated by the primary coil in the sodium liquid in the compensating coil with fewer turns is far less than the electromagnetic signal generated by the eddy current in the induction coil with more turns. The compensation coil can counteract the background signal generated by the primary coil in the induction coil, and simultaneously reduce little useful signal generated by the eddy current in the sodium liquid in the induction coil.
In this embodiment one, the sodium level sensor further includes a temperature sensor 109, and the temperature sensor is disposed in the protective sleeve. Through temperature sensor, can detect the temperature in the sodium level sensor to reduce the influence of temperature variation to each coil of sodium level sensor, thereby improve the stability of measuring. Specifically, the temperature sensor is a thermocouple.
In this embodiment one, sodium level sensor still includes metal probe 110, and metal probe sets up in protective sheath for whether detect sodium liquid and leak to protective sheath in.
In the first embodiment, the protective sleeve is made of stainless steel. The first coil frame and the second coil frame are made of stainless steel. It should be noted that, in the first embodiment, the materials of the protective sleeve, the first coil frame, and the second coil frame are not limited to stainless steel, and other materials may be freely selected according to actual situations, and specific details of other types of materials are not repeated in the first embodiment.
Example two
Referring to fig. 2, a sodium liquid level sensor according to a second embodiment of the present invention includes a protective sleeve 101, a first bobbin 102, and a second bobbin 103; the first coil frame 102 is sleeved outside the second coil frame 103, and the protective sleeve is sleeved outside the first coil frame 102; an induction coil 104 is arranged on the first coil frame, and a primary coil 105 and a compensation coil 106 are arranged on the second coil frame; the axial length of the induction coil is equal to the axial effective length of the first coil former; the axial length of the primary coil is equal to the axial effective length of the second coil frame; the axial length of the compensation coil is equal to the axial effective length of the second coil former. The first bobbin and the second bobbin are both tubular. The sodium liquid level sensor provided by the second embodiment of the invention can protect the first coil frame and the second coil frame by adopting the protective sleeve, and the axial length of the induction coil is equal to the axial effective length of the first coil frame; the axial length of the primary coil is equal to the axial effective length of the second coil frame; the axial length of the compensation coil is equal to the axial effective length of the second coil rack, so that a measuring blind area does not exist, and the safety is high. This arrangement of the primary coil 105, the induction coil 104 and the compensation coil 106 reduces the background signal low, improves the sensitivity high, and has good stability.
In the second embodiment, the induction coil 104 is spirally wound in the axial direction of the outer surface of the first bobbin 102; the second bobbin includes a first sub-coil bobbin 111 and a second sub-coil bobbin 112; the first sub-coil bobbin 111 is sleeved outside the second sub-coil bobbin 112, and the first coil former 102 is sleeved outside the first sub-coil bobbin 111; the primary coil 105 is spirally wound in the axial direction of the outer surface of the first sub-coil bobbin 111, and the compensation coil 106 is spirally wound in the axial direction of the outer surface of the second sub-coil bobbin 112; the axis of the first bobbin 102, the axis of the first sub-coil bobbin 111, and the axis of the second sub-coil bobbin 112 are collinear; the first bobbin 102, the first sub-coil bobbin 111, and the second sub-coil bobbin 112 are all tubular. Specifically, the axial effective length of the first sub-coil bobbin and the axial effective length of the second sub-coil bobbin are also the axial effective length of the second coil former, that is, the axial length of the primary coil is equal to the axial effective length of the first sub-coil bobbin; the axial length of the compensation coil is equal to the axial effective length of the second sub-coil skeleton. In addition, the axial effective length of the first coil form and the axial effective length of the second coil form refer to the length of a measuring section of the sodium liquid level sensor. The axial starting end of the induction coil, the axial starting end of the primary coil and the axial starting end of the compensation coil are flush.
In the second embodiment, the number of turns of the compensation coil is smaller than that of the induction coil. Thus, the compensation coil with less turns can cancel the background signal generated by the primary coil in the induction coil with more turns. In addition, because the radial distance between the compensating coil and the sodium liquid is greater than that between the induction coil and the sodium liquid, the electromagnetic signal generated by the eddy current generated by the primary coil in the sodium liquid in the compensating coil with fewer turns is far smaller than the electromagnetic signal generated by the eddy current in the induction coil with more turns. The compensation coil can counteract the background signal generated by the primary coil in the induction coil, and simultaneously reduce little useful signal generated by the eddy current in the sodium liquid in the induction coil.
In the second embodiment, the radial distance d1 between the compensation coil and the primary coil is smaller than the radial distance d2 between the induction coil and the primary coil. Therefore, the background signal generated by the primary coil in the induction coil can be reduced, and the background signal generated by the primary coil in the induction coil with more turns can be offset by the compensation coil with less turns.
In the second embodiment, the sodium liquid level sensor further includes a temperature sensor 109, and the temperature sensor is disposed in the protective sleeve. Through temperature sensor, can detect the temperature in the sodium level sensor to reduce the influence of temperature variation to each coil of sodium level sensor, thereby improve the stability of measuring. Specifically, the temperature sensor is a thermocouple.
In the second embodiment, the sodium liquid level sensor further includes a metal probe 110, and the metal probe is disposed in the protective casing for detecting whether the sodium liquid leaks into the protective casing.
In the second embodiment, the protective sleeve is made of stainless steel. The material of the first coil frame, the material of the first sub-coil framework and the material of the second sub-coil framework are all stainless steel. It should be noted that, in the second embodiment, the material of the protective sleeve, the material of the first coil former, the material of the first sub-coil former, and the material of the second sub-coil former are not limited to stainless steel, and other materials may be freely selected according to actual situations, and further details are not repeated for the second embodiment with other forms of materials.
EXAMPLE III
Referring to fig. 3, a third embodiment of the present invention provides a sodium liquid level detection device, which includes a signal processor 113 and a sodium liquid level sensor provided in the first embodiment; the induction coil 104, the primary coil 105 and the compensation coil 106 are electrically connected to a signal processor, respectively, and the temperature sensor 109 and the metal probe 110 are electrically connected to a signal processor 113, respectively. In the working process, the sodium liquid level sensor is placed in the sodium liquid in a mode that the axial direction of the sodium liquid level sensor is perpendicular to the liquid level of the sodium liquid, signals induced by the induction coil and the compensation coil are subjected to difference value operation in the signal processor and then converted into a liquid level value, and therefore the influence of temperature change on measurement signals can be greatly reduced, and the measurement sensitivity and stability are improved. In addition, when the sodium liquid leaks into the protective sleeve, the metal probe is contacted with the sodium liquid, the circuit is closed, and the signal processor outputs a leakage alarm signal.
It should be noted that, based on the property of high conductivity of the sodium liquid, the sodium liquid level detection device provided by the third embodiment of the present invention can also be used for detecting the liquid level of other high conductivity materials.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The sodium liquid level detection device is characterized by comprising a signal processor and a sodium liquid level sensor;
the sodium liquid level sensor comprises a protective sleeve, a first coil frame and a second coil frame; the first coil frame is sleeved outside the second coil frame, and the protective sleeve is sleeved outside the first coil frame; an induction coil is arranged on the first coil frame, and a primary coil and a compensation coil are arranged on the second coil frame; the axial length of the induction coil is equal to the axial effective length of the first coil former; the axial length of the primary coil is equal to the axial effective length of the second coil frame; the axial length of the compensation coil is equal to the axial effective length of the second coil frame;
the induction coil, the primary coil and the compensation coil are electrically connected with the signal processor respectively;
the sodium liquid level sensor also comprises a temperature sensor, and the temperature sensor is arranged in the protective sleeve;
the sodium liquid level sensor also comprises a metal probe which is used for detecting whether sodium liquid leaks into the protective sleeve;
in the working process, the sodium liquid level sensor is placed in sodium liquid in a mode that the axial direction of the sodium liquid level sensor is vertical to the liquid level of the sodium liquid, and signals induced by the induction coil and the compensation coil are converted into a liquid level value after difference value operation is carried out in the signal processor; when the sodium liquid leaks into the protective sleeve, the metal probe is contacted with the sodium liquid, the circuit is closed, and the signal processor outputs a leakage alarm signal.
2. The sodium level detection device of claim 1, wherein the induction coil is helically wound in an axial direction of an outer surface of the first bobbin; the primary coil and the compensation coil are respectively spirally wound in an axial direction of an outer surface of the second bobbin; the primary coil and the compensation coil are arranged in a staggered mode; the helix angle of the primary coil is the same as the helix angle of the compensation coil.
3. The sodium level detection device of claim 1, wherein the induction coil is helically wound in an axial direction of an outer surface of the first bobbin; the second coil frame comprises a first sub-coil frame and a second sub-coil frame; the first sub-coil framework is sleeved outside the second sub-coil framework; the primary coil is spirally wound on the axial direction of the outer surface of the first sub-coil skeleton, and the compensation coil is spirally wound on the axial direction of the outer surface of the second sub-coil skeleton; and the axis of the first coil former, the axis of the first sub-coil former and the axis of the second sub-coil former are collinear.
4. The sodium level detection device of claim 3, wherein the radial spacing of the compensation coil from the primary coil is less than the radial spacing of the induction coil from the primary coil.
5. The sodium level detection device of any one of claims 1-4, wherein the number of turns of the compensation coil is less than the number of turns of the induction coil.
6. The sodium level detection device of claim 1, wherein the temperature sensor is a thermocouple.
7. The sodium level detection device of any one of claims 1-4, wherein the protective sleeve is made of stainless steel.
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| CN201610096511.7A CN105628137B (en) | 2016-02-22 | 2016-02-22 | Sodium liquid level detection device |
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| CN201610096511.7A CN105628137B (en) | 2016-02-22 | 2016-02-22 | Sodium liquid level detection device |
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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 |
| CN110223830B (en) * | 2019-06-19 | 2020-10-16 | 武汉钢铁有限公司 | Framework structure for induction coil of embedded molten steel level sensor |
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| CN2060885U (en) * | 1989-11-06 | 1990-08-22 | 太原机械学院 | Strip shaped composite electromagnetic induction probe |
| CN2318619Y (en) * | 1998-02-12 | 1999-05-12 | 姜虹 | Vortex metal surface position detection device |
| CN2335132Y (en) * | 1997-05-14 | 1999-08-25 | 姜虹 | Electromagnetic type liquid metal level measuring controller |
| CN1272628C (en) * | 2003-09-17 | 2006-08-30 | 姜虹 | Device for detecting slag content of liquid metal orifice |
| CN103163214A (en) * | 2011-12-08 | 2013-06-19 | 衡阳镭目科技有限责任公司 | Molten slag content detection apparatus adopting solenoid |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9913935D0 (en) * | 1999-06-15 | 1999-08-18 | Scient Generics Ltd | Position encoder for cylindrical geometries |
| CN103134565A (en) * | 2011-12-02 | 2013-06-05 | 衡阳镭目科技有限责任公司 | Vortex type metal liquid level detection device |
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- 2016-02-22 CN CN201610096511.7A patent/CN105628137B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2060885U (en) * | 1989-11-06 | 1990-08-22 | 太原机械学院 | Strip shaped composite electromagnetic induction probe |
| CN2335132Y (en) * | 1997-05-14 | 1999-08-25 | 姜虹 | Electromagnetic type liquid metal level measuring controller |
| CN2318619Y (en) * | 1998-02-12 | 1999-05-12 | 姜虹 | Vortex metal surface position detection device |
| CN1272628C (en) * | 2003-09-17 | 2006-08-30 | 姜虹 | Device for detecting slag content of liquid metal orifice |
| CN103163214A (en) * | 2011-12-08 | 2013-06-19 | 衡阳镭目科技有限责任公司 | Molten slag content detection apparatus adopting solenoid |
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