CN206339281U - A kind of section heating type multipoint thermocouple level sensor by heat-conducting block heat conduction - Google Patents
A kind of section heating type multipoint thermocouple level sensor by heat-conducting block heat conduction Download PDFInfo
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- CN206339281U CN206339281U CN201621385202.3U CN201621385202U CN206339281U CN 206339281 U CN206339281 U CN 206339281U CN 201621385202 U CN201621385202 U CN 201621385202U CN 206339281 U CN206339281 U CN 206339281U
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- Prior art keywords
- heat
- conducting block
- thermocouple
- level sensor
- pressure
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 32
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000943 NiAl Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011553 magnetic fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
A kind of section heating type multipoint thermocouple level sensor by heat-conducting block heat conduction, N block heat-conducting blocks are included in pressure-bearing sleeve pipe, wherein (N 1) block heat-conducting block heats cable by an armouring for having (N 1) section resistive heater and heated, the length of resistive heater is identical with the height of heat-conducting block, respectively there is a heated armoured thermocouple on heated (N 1) block heat-conducting block, its measuring point is located at the middle of heat-conducting block;Wherein 1 piece is the heat-conducting block not heated, and has an armoured thermocouple thereon, N blocks heat-conducting block is positioned by support plate and heat-conducting block is close on the inwall of pressure-bearing sleeve pipe, and liquid level is measured by heating thermocouple with being not added with the temperature difference value of heat pipe-thermocouple.
Description
Technical field
The utility model is related to a kind of heating type liquid level sensor for thermocouple, for liquid level in container or liquid storage tank
Measurement.
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 a kind of equipment of the energy direct measurement pressure resistant vessel liquid level in the urgent need to high reliability.
Though in addition, occurring in that hot end heating-type thermocouple liquid level gauge, it monitors single-point liquid level, for multiple spot liquid level prison
, it is necessary to arrange branched hot end heating-type thermocouple liquid level gauge during survey, volume is there is greatly, the shortcoming more than chamber wall through hole;
Some subsection heating type liquid level sensor for thermocouple, though having the advantages that small volume and measuring point are more, have Segmented electrical in sleeve pipe
Hinder the mutual accurate location location difficulty and the shortcoming of MgO poor thermal conductions of silk and differential thermocouple.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of logical to overcome the above-mentioned not enough of prior art
The section heating type multipoint thermocouple level sensor of heat-conducting block heat conduction is crossed, makes its thermocouple accurate positioning, measurement accuracy high.
The utility model solve the technical scheme that is used of above-mentioned technical problem for:
A kind of section heating type multipoint thermocouple level sensor by heat-conducting block heat conduction, it is characterised in that：Pressure-bearing set
N block heat-conducting blocks are included in pipe, are added wherein (N-1) block heat-conducting block heats cable by an armouring for having (N-1) section resistive heater
Heat, the length of resistive heater is identical with the height of heat-conducting block, respectively have on heated (N-1) block heat-conducting block one it is heated
Armoured thermocouple, its measuring point is located at the middle of heat-conducting block;Wherein 1 piece is the heat-conducting block not heated, and has an armouring heat thereon
Galvanic couple, N blocks heat-conducting block is positioned by support plate and heat-conducting block is close on the inwall of pressure-bearing sleeve pipe, by heat thermocouple with not
The temperature difference value of thermocouple is heated to measure liquid level.
Heat on the heated heat-conducting block of above-mentioned (N-1) block passes to pressure-bearing sleeve pipe outer shroud by the tube wall of pressure-bearing sleeve pipe
Border medium, due to the notable difference of the heat transfer property of liquid and gas medium, so measured by heated armoured thermocouple
The high of heat conduction deblocking temperature reflects the position that the medium that pressure-bearing covers pipe external environment at heat-conducting block is liquid phase or gas phase, i.e. liquid level with low
Put.The temperature for being not added with hot heat-conducting block reflects environment temperature, is the reference point of level gauging.Thermocouple liquid level of the present utility model
Sensor using vapour/gas and notable difference of the liquid in terms of heat transfer property, by means of the armoured thermocouple that does not heat and by
The difference value Δ E for the thermoelectrical potential E that the armoured thermocouple of heating is surveyed high level differentiates that its position is in liquid with low level
Among, it is among vapour/gas.When the measuring point of liquid-immersed heated armoured thermocouple, thermoelectrical potential difference value Δ E
For low level, when liquid departs from the measuring point of heated armoured thermocouple, thermoelectrical potential difference value Δ E is high level.
Above by the section heating type multipoint thermocouple level sensor of heat-conducting block heat conduction, detector axis is to position distribution
Several heated armoured thermocouples, it is poor that the distance between its measuring point represents mutual liquid level, by means of physical installation
Position, is that may know that liquid level by the low level quantity of detector heat outputting potential difference value Δ E.Above-mentioned (N-1) branch is added
Armoured thermocouple on the heat-conducting block of heat is the sensing element for measuring liquid level, their measuring point and (N-1) number in armouring heating cable
The center of section resistance wire is in sustained height, improves the precision of liquid level differentiation.
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 casing shoe 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, the outer surface of the inwall of above-mentioned pressure-bearing sleeve pipe and/or nickel heat-conducting block applies nickel, applies silver or gold, and the machine of filling up adds
The gap of work, increases the contact surface of metal surface, can preferably conduct heat.
Preferably, air or nitrogen medium are full of in above-mentioned pressure-bearing sleeve pipe, can more preferable leak detection by inflation pressure.
Preferably, the armoured thermocouple of multiple armoured thermocouples and multiple heating is corresponded, by multiple difference values come
Liquid level is measured, the liquid level so measured is more accurate.
Because the utility model can effectively be increased along pressure-bearing sleeve surface axle using heat-conducting block heat conduction, heat stepwise mode
To the inhomogeneities of Temperature Distribution, i.e., along pressure-bearing sleeve surface axial temperature formation (N-1) individual high-low area, so as to add
The sensitivity of differential temperature survey.Meanwhile, the temperature of resistance wire is also reduced, thus improve the reliability of level gauging.
Due also to by support plate, making the measuring point mutual alignment of grading resistance silk and heated thermocouple in pressure-bearing sleeve pipe
Accurate positioning and easily, thermal inertia it is small, liquid level that can directly, in accurately measure container is more useful in nuclear field and height
Used in the occasion of reliability requirement, naturally it is also possible to the measurement for liquid level in 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 detail below in conjunction with accompanying drawing embodiment.
As shown in figure 1, a kind of section heating type multipoint thermocouple level sensor by heat-conducting block heat conduction, including pressure-bearing
Sleeve pipe 3, heat-conducting block 4, armoured thermocouple 5, heating cable 6, support plate 8.
Four pieces of heat-conducting blocks 4 are positioned by support plate 8 and determine axially spaced-apart, and four pieces of heat-conducting blocks 4 are tightly pressed against and held by support plate 8
On the inwall of gland pipe 3, an armoured thermocouple 5 is fixed on every piece of heat-conducting block 4, the measuring point of thermocouple is located in heat-conducting block
Between locate, the heat-conducting block 4 for not connecting U-shaped armouring heating cable 6 is fixed on the bottom of pressure-bearing sleeve pipe 3.
One U-shaped armouring, which is heated, 3 sections of resistive heaters in cable 6, every section of resistive heater one piece of heat-conducting block 4 of correspondence, this
Three pieces of heat-conducting blocks 4 are not in the bottom of pressure-bearing sleeve pipe 3.
Air is full of in above-mentioned pressure-bearing sleeve pipe 3.
The material of above-mentioned pressure-bearing sleeve pipe 3 is 316L stainless steels, external diameter 8mm.
The material of 4 pieces of heat-conducting blocks 4 is pure nickel, and a U-shaped armouring for having 3 sections of resistive heaters heats the material of the sleeve pipe of cable 6
Expect for 316L stainless steels.The material of resistive heater is NI80Cr20;The thermo wires of 3 heated armoured thermocouples 5 is K-type
(NiCr-NiAl), shell material is 316L;The material of support plate 8 is 316L.
Encapsulated in the cold end package tube 1 of pressure-bearing sleeve pipe with High temperature epoxy resinses, built-in Pt100 thermal resistance thermometers 2 pass through
The thermometer 2 can both measure the temperature of the cold end, can measure the temperature absolute value of its elsewhere of pressure-bearing sleeve pipe as benchmark again.
Claims (7)
1. a kind of section heating type multipoint thermocouple level sensor by heat-conducting block heat conduction, it is characterised in that：Pressure-bearing sleeve pipe
(3) N blocks heat-conducting block (4) is included in, wherein (N-1) block heat-conducting block is heated by an armouring for having (N-1) section resistive heater
Cable (6) is heated, and the length of resistive heater is identical with the height of heat-conducting block, respectively has one on heated (N-1) block heat-conducting block
Heated armoured thermocouple (5), its measuring point is located at the middle of heat-conducting block;Wherein 1 piece heat-conducting block has thereon not heat
One armoured thermocouple (7), the inwall that N blocks heat-conducting block (4) is positioned by support plate (8) and makes heat-conducting block be close to pressure-bearing sleeve pipe
On, measure liquid level by heating thermocouple with being not added with the temperature difference value of heat pipe-thermocouple.
2. the section heating type multipoint thermocouple level sensor according to claim 1 by heat-conducting block heat conduction, it is special
Levy and be:The heat-conducting block not heated is located at the bottom of pressure-bearing sleeve pipe.
3. the section heating type multipoint thermocouple level sensor according to claim 1 by heat-conducting block heat conduction, it is special
Levy and be:Thermal resistance thermometer is installed in the cold end package tube of the pressure-bearing sleeve pipe.
4. the section heating type multipoint thermocouple level sensor according to claim 1 by heat-conducting block heat conduction, it is special
Levy and be:The inwall of the pressure-bearing sleeve pipe and/or the outer surface of heat-conducting block apply nickel, apply silver or gold.
5. the section heating type multipoint thermocouple level sensor according to claim 1 by heat-conducting block heat conduction, it is special
Levy and be:Multiple armoured thermocouples and the armoured thermocouple of heating are corresponded, and liquid level is measured by multiple difference values.
6. the section heating type multipoint thermocouple level sensor according to claim 1 by heat-conducting block heat conduction, it is special
Levy and be:Air or nitrogen medium are full of in the pressure-bearing sleeve pipe.
7. the section heating type multipoint thermocouple level sensor according to claim 1 by heat-conducting block heat conduction, it is special
Levy and be:The armouring heating cable is U-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621385202.3U CN206339281U (en) | 2016-12-16 | 2016-12-16 | A kind of section heating type multipoint thermocouple level sensor by heat-conducting block heat conduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621385202.3U CN206339281U (en) | 2016-12-16 | 2016-12-16 | A kind of section heating type multipoint thermocouple level sensor by heat-conducting block heat conduction |
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| Publication Number | Publication Date |
|---|---|
| CN206339281U true CN206339281U (en) | 2017-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621385202.3U Active CN206339281U (en) | 2016-12-16 | 2016-12-16 | A kind of section heating type multipoint thermocouple level sensor by heat-conducting block heat conduction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500798A (en) * | 2016-12-16 | 2017-03-15 | 宁波奥崎自动化仪表设备有限公司 | A kind of section heating type multipoint thermocouple level sensor by heat-conducting block heat conduction |
-
2016
- 2016-12-16 CN CN201621385202.3U patent/CN206339281U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500798A (en) * | 2016-12-16 | 2017-03-15 | 宁波奥崎自动化仪表设备有限公司 | A kind of section heating type multipoint thermocouple level sensor by heat-conducting block heat conduction |
| CN106500798B (en) * | 2016-12-16 | 2024-01-05 | 宁波奥崎自动化仪表设备有限公司 | Sectional heating type multi-point thermocouple liquid level detector conducting heat through heat conducting block |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| 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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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Chaohong Nuclear Energy Technology Co.,Ltd. Assignor: NINGBO AUQI AUTO-INSTRUMENT EQUIPMENT Co.,Ltd. Contract record no.: X2024980019490 Denomination of utility model: A segmented heating multi-point thermocouple liquid level detector that conducts heat through a thermal block Granted publication date: 20170718 License type: Common License Record date: 20241021 |