CN208520488U - A kind of double iridium rhodium thermocouple thermometers - Google Patents
A kind of double iridium rhodium thermocouple thermometers Download PDFInfo
- Publication number
- CN208520488U CN208520488U CN201721649108.9U CN201721649108U CN208520488U CN 208520488 U CN208520488 U CN 208520488U CN 201721649108 U CN201721649108 U CN 201721649108U CN 208520488 U CN208520488 U CN 208520488U
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- measuring rod
- iridium
- metal
- cathode
- rhodium
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Abstract
The utility model relates to a kind of double iridium rhodium thermocouple thermometers, including measurement end and display instrument, the measurement end includes positive measuring rod and cathode measuring rod, the anode measuring rod and cathode measuring rod include measuring rod core, the surface plating of the measuring rod core is equipped with metal iridium coating layer, the metal iridium coating surface, which plates, is equipped with metal rhodium coatings, and one end of the anode measuring rod and cathode measuring rod is connected separately with display instrument.A kind of double iridium rhodium thermocouple thermometers described in the utility model, the bimetallic thermocouple thermometer have the characteristics that superhigh temperature, anti-oxidant, obdurability and long-life are durable.
Description
Technical field
The utility model relates to temperature thermocouple technical fields, and in particular to a kind of double iridium rhodium thermocouple thermometers.
Background technique
Thermocouple is a kind of field of temperature measurement commonly temperature element, is combined into back by the conductor both ends of two kinds of heterogeneities
Lu Shi will generate thermocurrent when two binding site temperature differences in the loop.If thermocouple working end and reference end exist
The temperature difference, display instrument will indicate temperature value corresponding to the thermoelectrical potential of thermocouple generation.The thermoelectrical potential of thermocouple will be with
Measurement end temperature increases and increases, its size is only related with thermocouple material and both ends temperature, with the length of thermode and directly
Diameter size is unrelated.
Temperature is more than that 2000 DEG C of superelevation temperature measurement is the priority research areas of aerospace.Currently used temperature is super
The thermocouple of thermometric generallys use iridium rhodium 40- iridium thermocouple under 2000 DEG C of oxidation environment.A wherein extremely rhodium-containing amount 40%
Iridium-rhodium alloy, another extremely pure iridium, but since simple substance iridium has very high brittleness and cracking volatility, so being deposited in
In two large problems: 1. due to frequent brittle failure in brittleness use；2 due to volatilize fast applied at elevated temperature when silk material diameter can reduce quickly,
This two o'clock has all seriously affected the service life of iridium rhodium 40- iridium thermocouple.
Therefore a kind of superhigh temperature, anti-oxidant, obdurability and the longer thermocouple of service life in the presence of a harsh environment are studied
Thermometer is one of the field urgent problem to be solved.
Utility model content
In view of problems of the prior art, the purpose of the utility model is to provide a kind of superhigh temperature, anti-oxidant, tough
Double iridium rhodium thermocouple thermometers of property.
The purpose of this utility model is to be achieved through the following technical solutions:
A kind of double iridium rhodium thermocouple thermometers, including measurement end and display instrument, the measurement end include anode measurement
Bar and cathode measuring rod, the anode measuring rod and cathode measuring rod include measuring rod core, the surface plating of the measuring rod core
Equipped with metal iridium coating layer, the metal iridium coating surface plating is equipped with metal rhodium coatings, the anode measuring rod and cathode measurement
One end of bar is connected separately with display instrument.
Further, wherein double iridium rhodium thermocouple thermometers, further include compensating wire, it is described anode measuring rod and
Cathode measuring rod passes through compensating wire respectively and connect with display instrument.
Further, wherein the ratio between the thickness of metal rhodium coatings and the thickness of metal iridium coating layer are in the anode measuring rod
1:(2-9)。
Further, wherein the ratio between the thickness of metal rhodium coatings and the thickness of metal iridium coating layer are in the cathode measuring rod
1:(0.5-1.5)。
Further, wherein the diameter of the anode measuring rod and cathode measuring rod is 0.5-0.8mm.
Further, wherein the measuring rod core is made of metal tantalum.
Further, wherein double iridium rhodium thermocouple thermometers further include thermocouple protective casing, the thermocouple is protected
Protecting pipe is sheathed on the positive measuring rod and cathode measuring rod.
The utility model has the advantages that
Double iridium rhodium thermocouple thermometers provided by the utility model, the anode measuring rod and cathode measuring rod include gold
Belong to rhodium coatings and metal iridium coating layer, and the thickness of metal rhodium coatings and metal iridium coating layer thickness ratio are 1 in positive measuring rod:
(2-9), the thickness of metal rhodium coatings and metal iridium coating layer thickness ratio are 1:(0.5-1.5 in the cathode measuring rod) so that institute
Stating bimetallic thermocouple thermometer has the characteristics that superhigh temperature, anti-oxidant, obdurability and long-life are durable, while overcoming existing
There are the brittleness and volatility of simple substance iridium in technology.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of double iridium rhodium thermocouple thermometers provided by the utility model；
In figure, 1- display instrument, 2- compensating wire, 3- cathode measuring rod, 4- anode measuring rod.
Specific embodiment
The utility model provides a kind of double iridium rhodium thermocouple thermometers, illustrates to be embodied with specific embodiment below
Mode, it should be understood that specific embodiment described herein is only used to explain the utility model, is not used to limit originally practical
It is novel.
Embodiment 1
Shown in referring to Fig.1, the utility model provides a kind of double iridium rhodium thermocouple thermometers, including measurement end and display
Instrument 1, the measurement end include positive measuring rod 4 and cathode measuring rod 3, and the anode measuring rod 4 and cathode measuring rod 3 wrap
Measuring rod core is included, the surface plating of the measuring rod core is equipped with metal iridium coating layer, and the metal iridium coating surface plating is equipped with metal rhodium
One end of coating, the anode measuring rod 4 and cathode measuring rod 3 is connected separately with display instrument 1, when double iridium rhodium thermoelectricity
When in use, the display instrument 1 can accurately show measurement temperature to even thermometer.
Double iridium rhodium thermocouple thermometers, further include compensating wire 2, the anode measuring rod 4 and cathode measuring rod 3
It is connect respectively by compensating wire 2 with display instrument 1, double iridium rhodium thermocouple thermometers, when in use, the anode measurement
Bar 4 and cathode measuring rod 3 are both placed in measured vessel, when the positive measuring rod 4 has temperature with cathode measuring rod 3
When poor, the anode measuring rod 4, cathode measuring rod 3, compensating wire 2 and display instrument 1 constitute circuit, due to temperature in circuit
Difference generates thermocurrent, and display instrument 1 will indicate temperature value corresponding to the thermoelectrical potential of thermocouple generation.
The diameter of the anode measuring rod 4 and cathode measuring rod 3 is 0.5-0.8mm；The measuring rod core is by metal tantalum
It constitutes, the ratio between the thickness of metal rhodium coatings and the thickness of metal iridium coating layer are 1:(2-9 in the anode measuring rod 4)；It is described negative
The ratio between thickness of the thickness of metal rhodium coatings and metal iridium coating layer is 1:(0.5-1.5 in pole measuring rod 3), the metal iridium coating layer
With high-temperature oxidation resistance, the metal tantalum measuring rod core, fusing point (fusing point is up to 3000 DEG C) with higher, high temperature resistant, institute
It is extremely hard with matter to state metal rhodium coatings, it is wear-resisting, also there is comparable ductility, therefore metal rhodium coatings plating is set to the gold
Belong on iridium coating layer, overcomes volatility in the prior art, and using metal tantalum as measuring rod core, while cooperating the gold
Belong to rhodium coatings and overcome brittleness in the prior art as outermost layer, and in positive measuring rod 4 and cathode measuring rod 3 not
The iridium rhodium coatings of stack pile, so that the bimetallic thermocouple thermometer has superhigh temperature, anti-oxidant, obdurability, the long-life is resistance to
The features such as using.
Double iridium rhodium thermocouple thermometers further include thermocouple protective casing, and the thermocouple protective casing is sheathed on institute
It states on positive measuring rod 4 and cathode measuring rod 3, for protecting positive measuring rod 4 and cathode measuring rod 3, to prevent being corroded
Or damage.
Finally, it should be noted that above-described each embodiment is merely to illustrate the technical solution of the utility model, rather than
It is limited；Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art
It is understood that it can still modify to technical solution documented by previous embodiment, or to part of or whole
Technical characteristic is equivalently replaced；And these modifications or substitutions, it does not separate the essence of the corresponding technical solution the utility model
The range of each embodiment technical solution.
Claims (5)
1. a kind of double iridium rhodium thermocouple thermometers, which is characterized in that including measurement end and display instrument, the measurement end includes
Positive measuring rod and cathode measuring rod, the anode measuring rod and cathode measuring rod include measuring rod core, the measuring rod core
Surface plating be equipped with metal iridium coating layer, metal iridium coating surface plating is equipped with metal rhodium coatings, the anode measuring rod and
One end of cathode measuring rod is connected separately with display instrument, and the thickness of metal rhodium coatings and metal iridium apply in the anode measuring rod
The ratio between thickness of layer is 1:(2-9), the ratio between the thickness of the thickness of metal rhodium coatings and metal iridium coating layer in the cathode measuring rod
For 1:(0.5-1.5).
2. double iridium rhodium thermocouple thermometers according to claim 1, which is characterized in that further include compensating wire, it is described just
Pole measuring rod and cathode measuring rod pass through compensating wire respectively and connect with display instrument.
3. double iridium rhodium thermocouple thermometers according to claim 2, which is characterized in that the anode measuring rod and cathode are surveyed
The diameter of gauge rod is 0.5-0.8mm.
4. double iridium rhodium thermocouple thermometers according to claim 2, which is characterized in that the measuring rod core is by metal tantalum structure
At.
5. double iridium rhodium thermocouple thermometers according to claim 1-4, which is characterized in that further include that thermocouple is protected
Protecting pipe, the thermocouple protective casing are sheathed on the positive measuring rod and cathode measuring rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721649108.9U CN208520488U (en) | 2017-11-30 | 2017-11-30 | A kind of double iridium rhodium thermocouple thermometers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721649108.9U CN208520488U (en) | 2017-11-30 | 2017-11-30 | A kind of double iridium rhodium thermocouple thermometers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208520488U true CN208520488U (en) | 2019-02-19 |
Family
ID=65328021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721649108.9U Expired - Fee Related CN208520488U (en) | 2017-11-30 | 2017-11-30 | A kind of double iridium rhodium thermocouple thermometers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208520488U (en) |
-
2017
- 2017-11-30 CN CN201721649108.9U patent/CN208520488U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190219 |