CN206540588U - A kind of nuclear power station reactor core level sensor - Google Patents
A kind of nuclear power station reactor core level sensor Download PDFInfo
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- CN206540588U CN206540588U CN201720177790.XU CN201720177790U CN206540588U CN 206540588 U CN206540588 U CN 206540588U CN 201720177790 U CN201720177790 U CN 201720177790U CN 206540588 U CN206540588 U CN 206540588U
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- thermocouple
- armoured thermocouple
- nuclear power
- power station
- level sensor
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
A kind of nuclear power station reactor core level sensor, it is characterised in that:Including pressure-bearing sleeve pipe, armouring heating cable, armoured thermocouple, nickel powder and Al2O3Powder, heated armoured thermocouple is propped up comprising armoured thermocouple, N (N >=2) and include the armouring heating cable of N (N >=2) section resistive heater in pressure-bearing sleeve pipe, armoured thermocouple is located at the bottom of pressure-bearing sleeve pipe, the nickel powder of padding and compacting in N sections of resistive heater axial length regions, in addition axial region, the Al of padding and compacting2O3Powder, armoured thermocouple constitutes the thermocouple measurement pair of measurement liquid level with the armoured thermocouple at heating.It had both added the sensitivity of level gauging, and the antijamming capability of measurement is improved again.
Description
Technical field
The utility model is related to a kind of heating type liquid level sensor for thermocouple, more particularly to a kind of to be used for nuclear power plant reactor
The measurement of core temperature and liquid level.
Background technology
At present, the pressure vessel of pressurized-water reactor nuclear power plant and the high temperature in thermal power plant, high-pressure boiler or this kind of height of liquid storage tank
The liquid level sensor that the occasion of reliability requirement is used, use mostly differential pressure type level gauge, float level meter, magnetic fluid level gauge with
And the liquid level gauge such as transparent glass tube (plate), some in these liquid level gauges belong to indirect measurement, and some reliabilities are not high, and some are used
Life-span is shorter.And in the occasion of these high reliability requests the reliability of level gauging be directly connected to production equipment safety and
Personal safety, so in the urgent need to a kind of equipment that can directly monitor liquid level in pressure resistant vessel of high reliability.In addition, (1)
Some hot end heating-type thermocouple liquid level gauges are monitoring single-point liquid levels, for multiple spot level monitoring, need to arrange branched hot junction
Heating-type thermocouple liquid level gauge, haves the shortcomings that volume is big, chamber wall through hole is more;(2) existing section heating type heat
Galvanic couple liquid level sensor, though having the advantages that small volume and measuring point are more, has grading resistance silk and differential thermocouple in sleeve pipe
The accurate location location difficulty and the poor shortcoming of MgO heat transfer of measuring point.
The content of the invention
Technical problem to be solved in the utility model is to provide a seed nucleus to overcome the above-mentioned not enough of prior art
Power station reactor core level sensor, can directly, accurately and quickly monitor the liquid level of container inner medium, be more suitable for
Used in the occasion of nuclear field and high reliability request.
The utility model solve the technical scheme that is used of above-mentioned technical problem for:
A kind of nuclear power station reactor core level sensor, it is characterised in that:Including pressure-bearing sleeve pipe, armouring heating cable, armour
Fill thermocouple, nickel powder and Al2O3Powder, in pressure-bearing sleeve pipe comprising armoured thermocouple, N (N >=2) prop up heated armoured thermocouple and
Include the armouring heating cable of N (N >=2) section resistive heater, armoured thermocouple is located at the bottom of pressure-bearing sleeve pipe, in N sections of heating
The nickel powder of padding and compacting, axial region in addition, the Al of padding and compacting in resistance wire axial length region2O3Powder, armouring heat
Galvanic couple constitutes the thermocouple measurement pair of measurement liquid level with the armoured thermocouple at heating.
The armoured thermocouple measurement Core cooling agent outlet temperature of above-mentioned bottom, is also the reference point of level gauging.N branch adds
The armoured thermocouple of heat is the sensing element for measuring liquid level, and their measuring point heats the center of N sections of resistance wires in cable with U-shaped armouring
In identical height, the heat on N sections of resistive heaters covers tube wall by the nickel by powder in pressure-bearing sleeve pipe and pressure-bearing and passed to
Pressure-bearing covers pipe external environment medium, due to liquid phase and the notable difference of the heat transfer property of vapour/gas phase media, so being heated in nickel powder section
The temperature that measures of armoured thermocouple the high and low pressure-bearing set pipe external environment medium reflected at the measuring point be liquid phase or vapour/
Gas phase, may thereby determine that the position of liquid level.It is poor that the distance between N sections of resistive heaters represent mutual liquid level, borrows
Help physical packaging position, by the reference point and the low electricity of armoured thermocouple heat outputting potential difference value Δ E of heating of level gauging
Flat quantity, you can know liquid level.
Preferably, the center of the measuring point and N sections of resistive heaters of the heated armoured thermocouple of above-mentioned N branch is contour,
So measure more accurate.
Preferably, the upper end of above-mentioned pressure-bearing sleeve pipe also sets up another armoured thermocouple, also serves as the reference point of level gauging,
The thermocouple measurement pair of measurement liquid level is constituted with the armoured thermocouple at heating.
Preferably, thermal resistance thermometer is also equipped with the cold end package tube of above-mentioned pressure-bearing sleeve pipe, passes through thermal resistance thermometer
There is provided armoured thermocouple cold junction compensation temperature, so as in the case of without using compensating wire, pressure-bearing sleeve bottom is not heated
Armoured thermocouple can measure the temperature of medium.In addition, being higher than the operating mode of environment temperature for measured medium temperature, if pressure-bearing
Sleeve pipe is leaked, and the temperature measured can be raised, so as to judge whether pressure-bearing sleeve pipe leaks.
Preferably, above-mentioned resistance and temperature is calculated as Pt100, and such temperature measurement accuracy is higher.
Preferably, above-mentioned armoured thermocouple and the armoured thermocouple of heating are corresponded, and constitute the thermocouple of measurement liquid level
Measurement pair, the liquid level so measured is more accurate.
Due to the utility model using the mode of axial segmentation heating with using thermal conductivity metal nickel powder and Al2O3 powder interval
The structure of filling, can effectively increase the inhomogeneities along pressure-bearing sleeve surface Axial Temperature Distribution, i.e., along pressure-bearing sleeve pipe table
Face, axial temperature forms a N number of high low area, adds the sensitivity of level gauging, meanwhile, also reduce the temperature of resistance wire
Degree, thus improve the reliability of level gauging.Metal nickel powder is conducting medium again simultaneously, makes pressure-bearing sleeve pipe, armoured thermocouple
It is an equipotential body with armouring heating cable mutual conduction, improves the antijamming capability of measurement.
The utility model can also be used for the measurement of medium temperature and liquid level in other container or liquid storage tank.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing embodiment.
As shown in figure 1, a kind of nuclear power station reactor core level sensor, in pressure-bearing sleeve pipe 1 (its material is 316L)
Comprising:K-type (NiCr-NiAl) armoured thermocouple 2 and 7 (its shell material be 316L), the K-type (NiCr- of 3 heating
NiAl) armoured thermocouple 6 (its shell material is that 316L, external diameter are 1.0mm) and one include 3 sections of resistive heater (materials
For Ni80Cr20) U-shaped armouring heating cable 5 (its shell material is 316L);3 sections of resistive heater axles in pressure-bearing sleeve pipe
Tightly packed thermal conductivity nickel powder 3 is filled with to extension position, in addition, tightly packed Al is filled with2O3Powder 4.Pressure-bearing
Pt100 thermal resistance thermometers 8 are installed in the cold end package tube 9 of sleeve pipe.
The measurement end of the armoured thermocouple 6 of 3 heating is located in the center height of 3 sections of armouring heating resistance wires of cable 5.
K-type armoured thermocouple 2 is located at the bottom of pressure-bearing sleeve pipe, and K-type armoured thermocouple 7 is located at the upper end of pressure-bearing sleeve pipe.
Claims (7)
1. a kind of nuclear power station reactor core level sensor, it is characterised in that:Including pressure-bearing sleeve pipe, armouring heating cable, armouring
Thermocouple, nickel powder and Al2O3Armoured thermocouple, the heated armoured thermocouple in N >=2 are included in powder, pressure-bearing sleeve pipe and is included
The armouring heating cable of N >=2 section resistive heater, armoured thermocouple is located at the bottom of pressure-bearing sleeve pipe, N sections of resistive heater axial directions
The nickel powder of padding and compacting in length areas, axial region in addition, the Al of padding and compacting2O3Powder, armoured thermocouple and heating
The armoured thermocouple at place constitutes the thermocouple measurement pair of measurement liquid level.
2. nuclear power station reactor core level sensor according to claim 1, it is characterised in that:The N branch is added
The center of the measuring point and N sections of resistive heaters of the armoured thermocouple of heat is contour.
3. nuclear power station reactor core level sensor according to claim 1, it is characterised in that:The pressure-bearing sleeve pipe
Upper end also set up another armoured thermocouple, with heating armoured thermocouple constitute measurement liquid level thermocouple measurement pair.
4. nuclear power station reactor core level sensor according to claim 3, it is characterised in that:The pressure-bearing sleeve pipe
Cold end package tube in install thermal resistance thermometer.
5. nuclear power station reactor core level sensor according to claim 4, it is characterised in that:The thermal resistance temperature
Degree is calculated as Pt100.
6. nuclear power station reactor core level sensor according to claim 1, it is characterised in that:The armouring thermoelectricity
The even armoured thermocouple with heating is corresponded, and constitutes the thermocouple measurement pair of measurement liquid level.
7. nuclear power station reactor core level sensor according to claim 1, it is characterised in that:The armouring heating
Cable is U-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720177790.XU CN206540588U (en) | 2017-02-27 | 2017-02-27 | A kind of nuclear power station reactor core level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720177790.XU CN206540588U (en) | 2017-02-27 | 2017-02-27 | A kind of nuclear power station reactor core level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206540588U true CN206540588U (en) | 2017-10-03 |
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ID=59948953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720177790.XU Active CN206540588U (en) | 2017-02-27 | 2017-02-27 | A kind of nuclear power station reactor core level sensor |
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| CN (1) | CN206540588U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768159A (en) * | 2017-02-27 | 2017-05-31 | 宁波奥崎自动化仪表设备有限公司 | A kind of nuclear power station reactor core level sensor |
| CN109520634A (en) * | 2018-12-05 | 2019-03-26 | 宁波奥崎自动化仪表设备有限公司 | A kind of fast-response platinum resistance temperature sensor |
-
2017
- 2017-02-27 CN CN201720177790.XU patent/CN206540588U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768159A (en) * | 2017-02-27 | 2017-05-31 | 宁波奥崎自动化仪表设备有限公司 | A kind of nuclear power station reactor core level sensor |
| CN106768159B (en) * | 2017-02-27 | 2023-11-21 | 宁波奥崎自动化仪表设备有限公司 | Nuclear power station reactor core liquid level detector |
| CN109520634A (en) * | 2018-12-05 | 2019-03-26 | 宁波奥崎自动化仪表设备有限公司 | A kind of fast-response platinum resistance temperature sensor |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: Workshop 32, No.68, Yuhai East Road, Hangzhou Bay New District, Ningbo City, Zhejiang Province Patentee after: NINGBO AUQI AUTO-INSTRUMENT EQUIPMENT Co.,Ltd. Address before: Jiangbei District, Zhejiang city of Ningbo Province Dongsheng Street 315020 No. 52 Patentee before: NINGBO AUQI AUTO-INSTRUMENT EQUIPMENT Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |