CN110174160A - A kind of high temperature fluent metal probe - Google Patents
A kind of high temperature fluent metal probe Download PDFInfo
- Publication number
- CN110174160A CN110174160A CN201910509944.4A CN201910509944A CN110174160A CN 110174160 A CN110174160 A CN 110174160A CN 201910509944 A CN201910509944 A CN 201910509944A CN 110174160 A CN110174160 A CN 110174160A
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- probe
- connector
- high temperature
- tube
- screw thread
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—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 by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- General Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The disclosure belongs to the detection field of instrumentation technology of liquid metal, in particular to a kind of multipurpose probe measured applied to high temperature fluent metal level detection and temperature.The probe includes: structural member, transition piece, insulating part, sealing element；Wherein insulating part uses high temperature ceramic material.Structural member uses stainless steel material.Structural member includes: threaded male, upper compressing member, screw thread female connector, lower linking tube, probe；Insulating part includes: ceramic tube；High temperature fluent metal probe uses ceramic tube, is both structural member and insulating part, and sealing element is using metal gasket；When other structures part, connector are using stainless steel materials and parts, maximum operation (service) temperature can reach 650 DEG C.If temperature resistant capability can be also further increased to 1000 DEG C using nickel-base alloy or refractory metal material substitution production probe and threaded connector.
Description
Technical field
The disclosure belongs to the detection field of instrumentation technology of liquid metal, in particular to a kind of to be applied to high temperature fluent metal liquid
The multipurpose probe of position detection and temperature measurement.
Background technique
In liquid metal device, temperature and liquid level etc. are and operation and safety-related important parameter.Due to liquid metal
Running temperature is higher, and especially the liquid metals such as sodium, Na-K alloy, lithium, lead bismuth alloy working medium also has chemical property active
Feature generally cannot directly be contacted with air, very high to equipment sealing requirements, therefore temperature and liquid in liquid metal equipment
Position measurement is bigger compared to the common working medium technical difficulty such as water.
The measurement of liquid metal temperature is general to be extend into inside working medium by the way of thermocouple trap using a blind pipe,
Then it places armoured thermocouple and carries out thermometric.This mode can guarantee the leakproofness of device, adherent compared in device external
Accuracy of measurement is higher, but is also required to specially reserve thermocouple trap pipe in equipment adapter tube simultaneously, the degree that improves that the device is complicated.
The measurement of liquid level of liquid metal can be divided into two class of continous way liquidometer and level probe, more multiple relative to structure
It is miscellaneous, cost is higher and the continuous liquidometer that needs specially to demarcate, be used to indicate the level probe application of certain height liquid level more
Extensively, it can be warned in the safety levels of the equipment such as fluent metal loop storage tank, graduated cylinder, expansion drum, perfusion operation stop signal,
And multiple occasions such as flow calibration are applied.After liquid metal temperature is higher than fusing point, liquid metal vapor disperse can be generated
In ullage, coagulating sedimentation is easy in the lower level gauging component surface of temperature, corrosion is generated to probe material.Separately
Outside, the adhesion between insulating part and structural member is easily caused after metal working medium deposition, forms signal wrong report, frequency of maintenance is higher.Mesh
The maximum operating temperature of the fluent metal loops such as preceding Na-K alloy, lead bismuth alloy can reach 600 DEG C, for the safety fortune for ensureing circuit
Row realizes the functions such as calibration, warning, this just needs a kind of level probe that can be worked under high temperature fluent metal steam ambient,
And have preferable leakproofness and rapid-maintenance function.
The level probe used in liquid metal generally uses polytetrafluoroethylene (PTFE) etc. as insulating materials at present, and sealing is then
Polytetrafluoroethylene (PTFE) or vacuum flange are directlyed adopt, such probe installing and dismounting amount of parts is more, and maintenance convenience is poor,
Ultimate vacuum tightness is also not ideal enough in actual use.
In liquid metal equipment, it often will appear an equipment while needing the case where carrying out temperature and level gauging.
Such as need to be equipped with liquid level of at least three level probe for different height in the liquid metal vessels such as expansion drum, graduated cylinder and indicate,
Temperature measurement of 1 to the 3 thermocouple trap of setting for working medium in tank body simultaneously.And arranging exhaust air pipe, work are generally also needed on end socket
Other adapter tubes such as matter import and export pipe, it is narrow to often result in space, is also easy to produce interference, operating difficulties mutually between each adapter tube.
Summary of the invention
(1) purpose invented
In order to overcome the deficiencies of the prior art, present disclose provides a kind of structures to be simple and convenient to operate for high-temperature liquid state gold
Belong to the multipurpose probe of level detection and temperature measurement.
(2) technical solution
A kind of high temperature fluent metal probe, the device include: transition piece, insulating part, sealing element and are used to support
With fixed structural member；Wherein connected between sealing element and insulating part using transition piece；Wherein insulating part uses high temperature resistant
Ceramic material.
Structural member uses stainless steel material.
Structural member includes: threaded male, upper compressing member, screw thread female connector, lower linking tube, probe；Insulating part includes:
Ceramic tube；
Wherein threaded male is with externally threaded pipe fitting；Screw thread female connector is with internal thread pipe fitting, and screw thread
One end of female connector pipe internal surface is equipped with a circle bulge loop；One end of lower linking tube outer surface is equipped with a circle bulge loop；
Outside lower linking tube, threaded male is connect threaded female fitting sleeve with threaded female joint screw thread, and passes through upper compressing member
Lower linking tube is compressed, upper compressing member is located in screw thread female connector；
Ceramic tube is Circular Pipe, and ceramic tube sequentially passes through threaded male, upper compressing member, screw thread female connector, lower linking tube；
Probe passes through ceramic tube.
Probe includes probe fixing end and probe adjustable side；Its middle probe fixing end is Circular Pipe, and probe is fixed
End is across ceramic tube；Probe adjustable side is long cylinder, and the beginning end of probe adjustable side is fixedly connected with probe fixing end.
Probe is long straight round tube, and uses plug welded seal, and internal placement shielded thermocouple wire in bottom end.
Probe fixing end is fixedly connected as welding with probe adjustable side.
Transition piece includes: upper connector, middle connector, lower connector；Upper connector, middle connector, lower connector
It is cirque structure；Sealing element includes: gasket；
The upper and lower end of probe fixing end and ceramic tube is utilized respectively connection, the connection of lower connector；
Ceramic tube is connect with upper compressing member by middle connector；
Gasket is provided between upper compressing member and lower linking tube.
(3) beneficial effect
The high temperature fluent metal probe of the disclosure uses ceramic tube, is both structural member and insulating part, and sealing element is adopted
It is metal gasket；When other structures part, connector are using stainless steel material, maximum operation (service) temperature can reach 650 DEG C.If
Using nickel-base alloy or refractory metal material substitution production probe and threaded connector, temperature resistant capability can be also further increased to
1000℃。
The high temperature fluent metal probe that the disclosure provides is connected using fast thread, easy to maintenance quick, if liquid occurs
Metal adhesion false positive signal can be dismantled rapidly by screw thread.Maintenance process can be used blind plugging head temporary sealing, it is for clearance it is clean after
It installs again rapidly, reduces equipment because polluting caused by introducing air.
The high temperature fluent metal probe material that the disclosure provides can both use solid stainless steel bars manufacture can also be with
Stainless steel tube after using bottom soldering and sealing places armouring thermocouple wire and carries out thermometric as thermocouple trap, inside, be provided simultaneously with probe and
The function of thermometric reduces adapter tube at the top of equipment, facilitates operation.When for example, by using Ф 5 × 0.5mm straight tube, after the welded seal of bottom
It can be used as the thermocouple trap that internal diameter is Ф 4mm.Thermocouple wire can be adjusted arbitrarily in thermocouple trap internal height, measure the liquid of different location
State metal temperature uses very convenient flexible.In this way, it can be achieved that the multifunctional use of probe, i.e., simultaneously into
Row level detection and liquid metal temperature measurement, increase substantially device space utilization rate.
The high temperature fluent metal probe that the disclosure provides has high reliability, is not easy to reveal.Have between probe and connector
Multiple pads, after lower pad leakproofness failure between connector and ceramic tube still can by upper connector and ceramic tube it
Between pad keep leakproofness, avoid single point failure.Gasket seal can be selected respectively according to the requirement of working medium compatibility
The different materials such as iron, copper, nickel, slip can be controlled in 1 × 10-11Pa·m3Within/s.Without axial direction between sealing element and insulating part
The situation of pressure transmitting, the Major disruptionL that can directly be pressurized to avoid ceramic member in average probe compaction process occurs.
The high temperature fluent metal probe structure that the disclosure provides is simple, and cost is relatively low, is suitble to batch micro operations；Probe cross section product
It is small, in equipment can flexible arrangement, probe length can freely intercept welding as needed, the probe in the case where guaranteeing verticality
Length can be more than 2m.
Detailed description of the invention
Fig. 1 is probe structure schematic diagram；
Fig. 2 is application schematic diagram of the probe in liquid metal vessels；
Fig. 3 is high temperature fluent metal detection system schematic diagram；
Wherein 1 upper connector；2 threaded males；Connector in 3；Compressing member on 4；5 screw thread female connectors；6 lower linking tubes；7 potteries
Porcelain tube；8 lower connectors；9 probe fixing ends；10 probe adjustable sides；11 gaskets；12 working medium inlet/outlet pipes；13 overflow ports；14 liquid
Metal bath surface；15 low level probes；Position probe in 16；17 high-order probes；18 power supplys；19 loudspeaking attention devices；20 indicator lights；21 thermoelectricity
Even temperature indicator；22 shielded thermocouple wires；23 high temperature fluent metal probes；24 liquid metal vessels；
Specific embodiment
For the technical solution for the high temperature fluent metal probe for illustrating the disclosure being more clear, below with reference to Fig. 1, Fig. 2
It is described in detail with Fig. 3 and specific embodiment probe provided the disclosure:
A kind of high temperature fluent metal probe of the disclosure, the device include: structural member, transition piece, insulating part, sealing
Part；Wherein insulating part uses high temperature ceramic material.Structural member uses stainless steel material.Structural member include: threaded male 2,
Upper compressing member 4, screw thread female connector 5, lower linking tube 6, probe；Insulating part includes: ceramic tube 7；Wherein threaded male 2 is band
There is externally threaded pipe fitting；Screw thread female connector 5 is band internal thread pipe fitting, and one end of 5 pipe internal surface of screw thread female connector is equipped with
One circle bulge loop；One end of 6 outer surface of lower linking tube is equipped with a circle bulge loop；5 sets of screw thread female connector outside lower linking tube 6, threaded male 2
It is threadedly coupled with screw thread female connector 5, and lower linking tube 6 is compressed by upper compressing member 4, upper compressing member 4 is located in screw thread female connector 5；
Threaded male 2 is threadedly coupled with screw thread female connector 5 and realizes the fixation to lower linking tube 6 by upper compressing member 4；Ceramic tube 7 is
Circular Pipe, and ceramic tube 7 sequentially passes through threaded male 2, upper compressing member 4, screw thread female connector 5, lower linking tube 6；Probe is worn
Cross ceramic tube 7.Probe includes probe fixing end 9 and probe adjustable side 10；Its middle probe fixing end 9 is Circular Pipe, and is visited
Needle fixing end 9 passes through ceramic tube 7；Probe adjustable side 10 is long cylinder, and the beginning end of probe adjustable side 10 and probe fixing end 9
It is fixedly connected.Probe is long straight round tube, and uses plug welded seal, and internal placement shielded thermocouple wire in bottom end
22.Probe fixing end 9 is fixedly connected as welding with probe adjustable side 10.Transition piece includes: upper connector 1, middle connection
Part 3, lower connector 8；Sealing element includes: gasket 11；The upper and lower end of probe fixing end 9 and ceramic tube 7 be utilized respectively connection,
Lower connector 8 connects；Ceramic tube 7 is connect with upper compressing member 4 by middle connector 3；It is arranged between upper compressing member 4 and lower linking tube 6
There is gasket 11.
Probe provided by the disclosure is in use, only need reserved lower half portion in the device fabrication stage, i.e. in Fig. 1
Screw thread female connector 5 and lower linking tube 6,6 lower part of lower linking tube can directly weld with apparatus closing end, weld after can also reserving skirt.Band
Before the top half installation of probe, reply probe dips alcohol or acetone to all possible Fluid Contacting state metals using gauze
Part carries out scrub clean, is then equipped with metal gasket 11 again and is installed.It should hunt leak in time after tightening nut, if hair
Now leakage should should increase the dynamics of screwing.For this probe due to using all-metal sealing, there is no crushing sealing element risks, therefore screw
Dynamics can be somewhat larger.
In conjunction with Fig. 2, the typical application scenarios of level probe are that more probes are installed simultaneously, by adjusting Fig. 1 middle probe tune
The length of probe can be adjusted flexibly by welding manner in the length at section end 10, and high, medium and low different liquid levels are arranged in a reservoir and refer to
Show.Such as a fluent metal loop high position expansion drum in use, liquid metal working medium from the inlet/outlet pipe in Fig. 2 into
Enter, low level probe 15 stops instruction for being perfused, and for middle position probe 16 for monitoring, high-order probe 17 opens letter as overflow valve
Number.
In the scene of Fig. 2, if using the stainless steel straight tube of 5 × 0.5mm of Ф as probe, 3 probes are available
Make the thermocouple trap that internal diameter is 4mm, diameter can swimmingly go deep into thermocouple trap bottom in the armoured thermocouple below of Ф 3 very much.
Thermocouple trap is set most appropriate generally in low level probe 15, liquid metal can be accurately measured when liquid level is higher or lower
Temperature, the temperature surveyed can be used for heater and keep the temperature the control signal of heat tracing.
Repair and replacement situation: probe insulating segment provided by the disclosure is 7 sections of longer ceramic tube, even if part and equipment
Metal evaporation adhesion occurs between cylinder will not cause short circuit, and signal wrong report occurs.In extreme circumstances, if probe is true
The real signal that occurs reports phenomenon by mistake, then should unscrew probe using spanner under argon gas inside or the protection of other inert gas micro-positive pressures
Top half slowly extracts probe out, then carries out temporary sealing using public blind plugging head.Then acetone or wine are dipped using gauze
Essence carries out slow wiping processing to the metal deposited at probe and ceramic tube 7, and confirmation without reinstalling again after adhesion.
Since connector and ceramic tube 7 have more than 1000 DEG C of heat-resisting ability, cools down or make by skirt
It uses heat-resisting material replacement stainless steel as structural member, and chooses the welding material that heatproof is more than 1000 DEG C, liquid can be achieved
The measurement of liquid level when reaching 1000 DEG C below metal bath surface 14.At such a temperature, the sealing structure of the disclosure is still reliable.
The there is provided probe of the disclosure carried out successful application in Na-K alloy, potassium storage tank, expansion drum and graduated cylinder, together
Shi Zuowei level probe and thermocouple trap use, and the space on end socket top are greatly saved, disassembly process is very convenient.
By taking the application of certain Na-K alloy circuit expansion tank as an example, expansion drum is set to circuit highest point, is provided with 3 in expansion drum
A probe with thermocouple trap, 3 probes are respectively 80mm (low level probe 15), 280mm (middle position probe apart from end socket distance from bottom
16), 480mm (high-order probe 17) is inserted with 3 K-type shielded thermocouple wires 22 in thermocouple trap.When circuit initially fills, using pressure
Poor method room temperature perfusion, the working medium in holding vessel is depressed into circuit, when 15 indicator light 20 of low level probe in expansion drum is lighted simultaneously
When beeping, that is, think that working medium has been filled in circuit, probe signals are to stop perfusion operation signal, the temperature in thermocouple trap
Degree display is still room temperature.Loop temperature is then slowly raised to 550 DEG C, working medium volume expansion therewith, liquid level are slow in circuit
It is increased to light at middle position probe 16 and by its indicator light 20, the thermocouple temperature display of middle position probe 16 also reaches 547 DEG C at this time
Left and right shows that Temperature of Working in expansion drum and the major loop temperature difference are smaller, and the heat preservation of system is good.When stable operation, low level is visited
As temperature controlling point, expansion drum outside wall surface winds heater strip and carries out thermal compensation thermocouple in needle 15, maintains temperature at 550 DEG C, prevents
Expansion drum heat dissipation excessively causes loop temperature uneven.The height near overflow port 13 is arranged in high-order probe 17, once due to
Maloperation or other reasons cause working medium liquid level in expansion drum to increase extremely, and high-order probe 17 will issue alarm signal, and conduct
Working medium is returned row by the open signal of overflow valve, prevents high temperature refrigerant from entering gas covering system.It is right after the test for having carried out setting
System cools down, and middle position probe 16 is switched to extinguish by illuminating state, and working medium carries out back row, low level probe 15 after being down to 100 DEG C
Signal also switchs to extinguish, and the liquid metal detection system on expansion drum completes primary complete liquid level and temperature sensing process.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the disclosure to the disclosure
Mind and range.If in this way, these modifications and variations of the disclosure are belonged to the model of disclosure claim and its equivalent technology
Within enclosing, then the disclosure is also intended to include these modifications and variations.Above-described embodiment or embodiment are only to the disclosure
For example, the disclosure can also be implemented with other ad hoc fashions or other particular form, without departing from the disclosure
Main idea or substantive characteristics.Therefore, the embodiment of description is regarded as illustrative and non-limiting in any way.This
Scope of disclosure should be illustrated that any variation equivalent with the intention and range of claim also should include by appended claims
Within the scope of this disclosure.
Claims (7)
1. a kind of high temperature fluent metal probe, which is characterized in that the device include: transition piece, insulating part, sealing element and
The structural member for being used to support and fixing；Wherein connected between the sealing element and insulating part using transition piece；It is wherein described
Insulating part uses high temperature ceramic material.
2. a kind of high temperature fluent metal probe according to claim 1, which is characterized in that the structural member uses stainless steel
Material.
3. a kind of high temperature fluent metal probe according to claim 1, which is characterized in that the structural member includes: screw thread
Pin end (2), upper compressing member (4), screw thread female connector (5), lower linking tube (6), probe；The insulating part includes: ceramic tube
(7)；
Wherein the threaded male (2) is with externally threaded pipe fitting；The screw thread female connector (5) is band internal thread pipe
Part, and one end of screw thread female connector (5) pipe internal surface is equipped with a circle bulge loop；One end of lower linking tube (6) outer surface is equipped with one
Enclose bulge loop；
The screw thread female connector (5) cover lower linking tube (6) outside, threaded male (2) is threadedly coupled with screw thread female connector (5), and
Lower linking tube (6) are compressed by upper compressing member (4), the upper compressing member (4) is located in screw thread female connector (5)；
The ceramic tube (7) is Circular Pipe, and ceramic tube (7) sequentially passes through threaded male (2), upper compressing member (4), threaded female
Connector (5), lower linking tube (6)；
The probe passes through ceramic tube (7).
4. a kind of high temperature fluent metal probe according to claim 3, which is characterized in that the probe includes probe
Fixing end (9) and probe adjustable side (10)；Wherein the probe fixing end (9) is Circular Pipe, and probe fixing end (9) passes through pottery
Porcelain tube (7)；The probe adjustable side (10) is long cylinder, and the beginning end of probe adjustable side (10) and probe fixing end (9) are solid
Fixed connection.
5. a kind of high temperature fluent metal probe according to claim 4, which is characterized in that the probe is long straight circle
Pipe, and plug welded seal, and internal placement shielded thermocouple wire (22) are used in bottom end.
6. a kind of high temperature fluent metal probe according to claim 4, which is characterized in that the probe fixing end (9) with
Probe adjustable side (10) is fixedly connected as welding.
7. a kind of high temperature fluent metal probe according to claim 3, which is characterized in that the transition piece includes:
Upper connector (1), middle connector (3), lower connector (8)；The upper connector (1), middle connector (3), lower connector (8) are equal
For cirque structure；The sealing element includes: gasket (11)；
The upper and lower end of the probe fixing end (9) and ceramic tube (7) is utilized respectively connection, lower connector (8) connects；
The ceramic tube (7) is connect with upper compressing member (4) by middle connector (3)；
Gasket (11) are provided between the upper compressing member (4) and lower linking tube (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509944.4A CN110174160A (en) | 2019-06-13 | 2019-06-13 | A kind of high temperature fluent metal probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509944.4A CN110174160A (en) | 2019-06-13 | 2019-06-13 | A kind of high temperature fluent metal probe |
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| Publication Number | Publication Date |
|---|---|
| CN110174160A true CN110174160A (en) | 2019-08-27 |
Family
ID=67698445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910509944.4A Pending CN110174160A (en) | 2019-06-13 | 2019-06-13 | A kind of high temperature fluent metal probe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378487A (en) * | 2020-11-27 | 2021-02-19 | 湖南汉华京电清洁能源科技有限公司 | Liquid alkali metal liquid level measuring device |
| CN112649039A (en) * | 2020-11-06 | 2021-04-13 | 重庆大学 | Multi-probe conductance probe for high-temperature and high-pressure two-phase flow detection and manufacturing method thereof |
-
2019
- 2019-06-13 CN CN201910509944.4A patent/CN110174160A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649039A (en) * | 2020-11-06 | 2021-04-13 | 重庆大学 | Multi-probe conductance probe for high-temperature and high-pressure two-phase flow detection and manufacturing method thereof |
| CN112378487A (en) * | 2020-11-27 | 2021-02-19 | 湖南汉华京电清洁能源科技有限公司 | Liquid alkali metal liquid level measuring device |
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