CN113532673A - High-precision platinum-rhodium thermocouple - Google Patents
High-precision platinum-rhodium thermocouple Download PDFInfo
- Publication number
- CN113532673A CN113532673A CN202110817786.6A CN202110817786A CN113532673A CN 113532673 A CN113532673 A CN 113532673A CN 202110817786 A CN202110817786 A CN 202110817786A CN 113532673 A CN113532673 A CN 113532673A
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- China
- Prior art keywords
- sleeve
- protection
- thermocouple
- terminal box
- bottom end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000007789 sealing Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 239000011241 protective layer Substances 0.000 description 14
- 230000001681 protective effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- -1 steam Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Images
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
- G01K1/10—Protective devices, e.g. casings for preventing chemical attack
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
- G01K1/12—Protective devices, e.g. casings for preventing damage due to heat overloading
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a high-precision platinum-rhodium thermocouple, which comprises a wiring terminal box, wherein the bottom end of the wiring terminal box is communicated with a protection structure, a thermocouple core structure is arranged in the protection structure, the bottom end of the protection structure is movably fixed in an adjusting structure, a user can insert the bottom end into a furnace through the adjusting structure, the depth of the bottom end entering the furnace and the gas with different heights entering the sleeve can be adjusted by adjusting the length of the sleeve, the gas with different heights can be detected, data is obtained finally, the operation is convenient, and the sleeve is formed by connecting three groups of protection layers, so that the device can be normally used under severe conditions of high temperature and high pressure, the temperature can be accurately measured, the thermoelectric property is very stable, the thermal response time is very short, the oxidation resistance is very strong, and the high temperature strength and the low temperature strength are almost the same, high thermal conductivity, small expansion coefficient, and no easy expansion and damage due to rapid cooling and heating.
Description
Technical Field
The invention relates to the field of galvanic couple devices, in particular to a high-precision platinum-rhodium thermocouple.
Background
The platinum-rhodium thermocouple is also called as high-temperature noble metal thermocouple, the platinum-rhodium is divided into single platinum-rhodium (platinum-rhodium 10-platinum-rhodium) and double platinum-rhodium (platinum-rhodium 30-platinum-rhodium 6), which are used as temperature measuring sensors, usually matched with temperature transmitters, regulators, display instruments and the like to form a process control system for directly measuring or controlling the temperature of fluid, steam, gas medium, solid surface and the like within the range of 0-1700 ℃ in various production processes. Generally, the thermocouple has high loss efficiency and short service life in a high-temperature and high-pressure use environment, so that the thermocouple needs to be replaced and overhauled regularly.
In chinese patent CN202020673864.0, a high-precision platinum-rhodium thermocouple is introduced, wherein an installation box is inserted at an interface of an external device, a ring is installed on an outer side of a thermocouple core, the thermocouple is placed in the installation box, the thermocouple gravity drives the thermocouple to move downward, the ring moves downward and contacts a movable plate, the movable plate is pressed downward, a spring is compressed, a connecting rod moves downward, an arc shell moves downward, the arc surface of the arc shell contacts the arc surface of the arc block and pushes the arc block outward, so that the clamping block is clamped with the external device, and the friction force of the contact area between the installation box and the external device is enhanced, thereby completing installation, and it is found in the actual operation process of a person skilled in the art that 1, the structure only meets the condition that the thermocouple is in a vertical state and cannot be used if the thermocouple is in a parallel angle during the use process, the application range is narrow, 2, in the use process of the structure, because the external protection structure has the phenomenon of swelling, the internal structure and the detection data are influenced, and the use time is also shortened.
Disclosure of Invention
In order to overcome the defects of inconvenience and weak structural property in the prior art, the invention provides a high-precision platinum-rhodium thermocouple, through the arrangement of the protection structure and the adjustment structure, a user can insert the bottom end into the furnace through the arranged adjustment structure, and through adjusting the length of the sleeve, further adjusting the depth of the gas entering the furnace and the gas with different heights entering the sleeve, detecting the gas with different heights, finally obtaining data, facilitating the operation, and wherein have three group's protective layer to connect in the sleeve pipe and form for but this device normal use under the abominable condition of high temperature high pressure can accurately carry out the temperature measurement, and the thermoelectric property is very stable, and thermal response time is very short, and the oxidation resistance is very strong, and high temperature strength is almost the same with low temperature strength, and coefficient of thermal conductivity is high, and the coefficient of expansion is very little, and the rapid cooling and rapid heating is difficult for the inflation damage.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a high accuracy platinum rhodium thermocouple, includes the wiring terminal box, the bottom intercommunication of wiring terminal box has protection architecture, be provided with thermocouple core structure in the protection architecture, just protection architecture's bottom activity is fixed in the adjustment structure.
As a preferred technical scheme of the invention, the connection terminal box comprises a shell, a wire holder, a connection box and a connection terminal, the connection box is arranged inside the shell, the connection box is internally provided with the wire holder, the bottom end of the wire holder is connected with the thermocouple core body structure, the other end of the wire holder is connected with the connection terminal, and a sealing ring is arranged between the outer side of the connection box and the inner wall of the shell.
As a preferred technical scheme of the present invention, the protection structure includes a protection tube, a positioning ring and a thermode, the top end of the thermode is electrically connected to the thermocouple core structure, the protection tube wraps the thermocouple core, and the positioning ring is fixed to the outer side of the bottom end of the protection tube.
As a preferred technical scheme of the present invention, the adjusting structure includes a sleeve and a snap ring, the top end of the sleeve is connected to the protective tube guide sleeve, and the snap ring is sleeved on the top end of the sleeve.
As a preferred technical scheme of the invention, the sleeve is of a hollow structure with one uncovered end, the side wall of the top end of the sleeve is divided into two groups of semicircular structures through two groups of grooves, and the bottom end of the sleeve is provided with a plurality of groups of air inlets.
According to a preferable technical scheme of the invention, the clamping ring is of a discontinuous annular structure, connecting plates are integrally arranged at two ends of the clamping ring, and the middle part of each group of connecting plates is fixedly connected through a fixing bolt.
As a preferable technical scheme of the invention, the sleeve comprises a first protective layer, a second protective layer and a third protective layer, and a stop block is arranged on the inner wall of the top end of the sleeve towards the inside.
As a preferred technical solution of the present invention, the size of the positioning ring is adapted to the size of the stopper.
Compared with the prior art, the invention can achieve the following beneficial effects:
1. according to the invention, through the arrangement of the protection structure and the adjustment structure, a user can insert the bottom end into the furnace through the adjustment structure, and further adjust the depth of the gas entering the furnace and the gas entering the sleeve at different heights by adjusting the length of the sleeve, so that the gas at different heights can be detected, and finally data can be obtained, thereby facilitating operation.
2. According to the invention, through the arranged adjusting structure, a user can firstly unscrew one end of the clamping ring through the fixing bolt to keep the loose state of the clamping ring, then plug the protective tube into the sleeve pipe or pull the protective tube out of the sleeve pipe according to the existing length, and in the pulling-out process, after the sleeve pipe reaches the limit length, the sleeve pipe can be contacted with the stop block at the top end of the sleeve pipe through the clamping ring on the outer side of the protective tube and is stopped, so that the protective tube is prevented from further extending outwards to cause the condition of structural damage.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is an exploded view of the adjustment structure of the present invention;
FIG. 4 is a cross-sectional view of the connection terminal box of the present invention;
fig. 5 is a schematic sectional view of the sleeve of the present invention.
Wherein: 1. a terminal block; 11. a housing; 12. a wire holder; 13. a junction box; 14. a binding post; 15. a seal ring; 2. a protective structure; 21. protecting the tube; 22. a positioning ring; 23. a thermode; 3. adjusting the structure; 31. a sleeve; 311. an air inlet; 312. a groove; 313. a stopper; 314. a first protective layer; 315. a second protective layer; 316. a third protective layer; 32. a snap ring; 321. a connecting plate; 33. and (5) fixing the bolt.
Detailed Description
The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example (b):
as shown in fig. 1-5, the invention provides a high-precision platinum-rhodium thermocouple, which comprises a connection terminal box 1, wherein the bottom end of the connection terminal box 1 is communicated with a protection structure 2, a thermocouple core body structure is arranged in the protection structure 2, and the bottom end of the protection structure 2 is movably fixed in an adjustment structure 3.
In other embodiments, the connection terminal box 1 includes a housing 11, a wire holder 12, a terminal box 13 and a terminal 14, the terminal box 13 is disposed inside the housing 11, the wire holder 12 is disposed in the terminal box 13, a bottom end of the wire holder 12 is connected to the thermocouple core structure, another end of the wire holder 12 is connected to the terminal 14, and a sealing ring 15 is disposed between an outer side of the terminal box 13 and an inner wall of the housing 11.
The sealing ring 15 can improve the sealing performance of the interior, and prevent external dust from entering the interior of the junction box 12 through gaps.
In other embodiments, the protection structure 2 includes a protection tube 21, a positioning ring 22 and a thermode 23, the top end of the thermode 23 is electrically connected to the thermocouple core structure, the protection tube 21 wraps the thermocouple core, and the positioning ring 22 is fixed outside the bottom end of the protection tube 21.
Through the protection architecture 2 and the adjustment structure 3 that set up, the user can be through the adjustment structure 3 that is provided with, the user can go deep into the stove with the bottom, length through adjustment sleeve 31, and then the adjustment gets into the degree of depth in the stove and gets into the gas of the co-altitude in the sleeve 31, can detect the gas of co-altitude not, reachs data at last, convenient operation, and wherein have three protective layers of group to connect in the sleeve 31 to form, make this device can be normal use under the abominable condition of high temperature high pressure, can accurately measure the temperature, the thermoelectric property is very stable, the thermal response time is very short, oxidation resistance is very strong, high temperature strength is almost the same with low temperature strength, the coefficient of thermal conductivity is high, the coefficient of expansion is very little, the rapid cooling and rapid heating is difficult for disconnected inflation damage.
In other embodiments, the adjusting structure 3 includes a sleeve 31 and a snap ring 32, the top end of the sleeve 31 is guided by the protection tube 21, and the snap ring 32 is sleeved on the top end of the sleeve 31.
Through the adjustment structure 3, a user can firstly unscrew one end of the clamping ring 32 through the fixing bolt 33 to keep the loose state, then insert the protection tube 21 into the sleeve 31/pull out the protection tube 31 according to the existing length, and in the pulling-out process, after the sleeve 31 reaches the limit length, the clamping ring 32 on the outer side of the protection tube 21 contacts with the stop 313 at the top end of the sleeve 31 to be stopped, so that the protection tube 21 is prevented from further extending outwards to cause the structural damage.
In other embodiments, the sleeve 31 is a hollow structure with one end uncovered, the sidewall of the top end of the sleeve 31 is divided into two sets of semicircular structures by two sets of grooves 312, and the bottom end of the sleeve 31 is provided with a plurality of sets of air inlets 311.
After the top end of the sleeve 31 is separated, the clamping ring 32 enables the protective tube 21 to be in a tightened or loosened state, so that a user can conveniently stretch and contract the protective tube 21 in the sleeve 31, and further, the temperature at different depths can be detected.
In other embodiments, the snap ring 32 is a discontinuous ring structure, and both ends of the snap ring 32 are integrally provided with a connecting plate 321, and the middle part of each group of connecting plates 321 is connected and fixed by a fixing bolt 33.
The user tightens up and loosens through connecting plate 321 and fixing bolt 33, and then strengthens the contact effect of joint ring 32 and sleeve pipe 31 top and protection tube 21, guarantees the structural stability when it uses.
In other embodiments, the sleeve 31 includes a first protective layer 314, a second protective layer 315, and a third protective layer 316, and a stopper 313 is disposed on an inner wall of a top end of the sleeve 31.
The first protective layer 314, the second protective layer 316 and the third protective layer 316 can protect the internal structure, and the plurality of groups of air inlets 311 arranged on the outer wall are used for detecting, so that the using effect is ensured, and the interference of the external environment on the internal environment is reduced.
In other embodiments, the retaining ring 22 is sized to fit the stop 313.
When the user moves the protection tube 21 to the top of the external environment, the stopper 313 contacts the bottom of the positioning ring 22 to limit the protrusion, so as to prevent the protrusion from being over-extended.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A high-precision platinum-rhodium thermocouple is characterized in that: the thermocouple junction box comprises a wiring terminal box (1), wherein the bottom end of the wiring terminal box (1) is communicated with a protection structure (2), a thermocouple core body structure is arranged in the protection structure (2), and the bottom end of the protection structure (2) is movably fixed in an adjusting structure (3).
2. A high precision platinum rhodium thermocouple according to claim 1, characterized in that: including casing (11), connection terminal (12), terminal box (13) and terminal (14) in wiring terminal box (1), terminal box (13) set up in the inside of casing (11), be provided with connection terminal (12) in terminal box (13), the bottom and the thermocouple core structure connection of connection terminal (12), the other end and the terminal (14) of connection terminal (12) are connected, be provided with sealing washer (15) between the outside of terminal box (13) and the inner wall of casing (11).
3. A high precision platinum rhodium thermocouple according to claim 1, characterized in that: including protection tube (21), holding ring (22) and thermode (23) in protection architecture (2), the top and the thermocouple core structure electric connection of thermode (23), protection tube (21) parcel thermocouple core, just holding ring (22) are fixed in the bottom outside of protection tube (21).
4. A high precision platinum rhodium thermocouple according to claim 3, characterized in that: the adjusting structure (3) comprises a sleeve (31) and a clamping ring (32), the top end of the sleeve (31) is connected with a guide sleeve of the protecting tube (21), and the clamping ring (32) is sleeved on the top end of the sleeve (31).
5. A high accuracy platinum rhodium thermocouple according to claim 4, characterized in that: the sleeve (31) is of a hollow structure with one uncovered end, the side wall of the top end of the sleeve (31) is divided into two groups of semicircular structures through two groups of grooves (312), and a plurality of groups of air inlets (311) are formed in the bottom end of the sleeve (31).
6. A high accuracy platinum rhodium thermocouple according to claim 4, characterized in that: the clamping ring (32) is of a discontinuous annular structure, connecting plates (321) are integrally arranged at two ends of the clamping ring (32), and each group of connecting plates (321) are fixedly connected with each other through a fixing bolt (33).
7. A high accuracy platinum rhodium thermocouple according to claim 4, characterized in that: the sleeve (31) comprises a first protection layer (314), a second protection layer (315) and a third protection layer (316), and a stop block (313) is arranged on the inner wall of the top end of the sleeve (31) towards the inside.
8. A high accuracy platinum rhodium thermocouple according to claim 4, characterized in that: the size of the positioning ring (22) is matched with that of the stop block (313).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110817786.6A CN113532673A (en) | 2021-07-20 | 2021-07-20 | High-precision platinum-rhodium thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110817786.6A CN113532673A (en) | 2021-07-20 | 2021-07-20 | High-precision platinum-rhodium thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113532673A true CN113532673A (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110817786.6A Pending CN113532673A (en) | 2021-07-20 | 2021-07-20 | High-precision platinum-rhodium thermocouple |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202836807U (en) * | 2012-08-21 | 2013-03-27 | 安徽天康(集团)股份有限公司 | Platinum rhodium thermocouple |
| CN203443691U (en) * | 2013-07-11 | 2014-02-19 | 江苏兆龙电气有限公司 | Platinum rhodium thermocouple |
| CN104568196A (en) * | 2015-01-04 | 2015-04-29 | 安徽蓝德仪表有限公司 | Platinum rhodium thermal coupler |
| CN204666271U (en) * | 2015-06-01 | 2015-09-23 | 鑫国集团有限公司 | A kind of blast furnace platinum rhodium thermocouple |
| CN105043574A (en) * | 2015-05-13 | 2015-11-11 | 任昆鹏 | In-furnace temperature measuring apparatus |
| CN204903028U (en) * | 2015-05-13 | 2015-12-23 | 任昆鹏 | Temperature measuring device in stove |
| CN207197691U (en) * | 2017-08-30 | 2018-04-06 | 久茂自动化(大连)有限公司 | A kind of insertion-type thermocouple for melten glass liquid thermometric |
| CN209247191U (en) * | 2019-01-15 | 2019-08-13 | 唐山市丰润区展望自动化设备有限公司 | A kind of thermocouple thermometer |
| CN211696714U (en) * | 2020-04-28 | 2020-10-16 | 安徽春辉仪表线缆集团有限公司 | High-precision platinum-rhodium thermocouple |
-
2021
- 2021-07-20 CN CN202110817786.6A patent/CN113532673A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202836807U (en) * | 2012-08-21 | 2013-03-27 | 安徽天康(集团)股份有限公司 | Platinum rhodium thermocouple |
| CN203443691U (en) * | 2013-07-11 | 2014-02-19 | 江苏兆龙电气有限公司 | Platinum rhodium thermocouple |
| CN104568196A (en) * | 2015-01-04 | 2015-04-29 | 安徽蓝德仪表有限公司 | Platinum rhodium thermal coupler |
| CN105043574A (en) * | 2015-05-13 | 2015-11-11 | 任昆鹏 | In-furnace temperature measuring apparatus |
| CN204903028U (en) * | 2015-05-13 | 2015-12-23 | 任昆鹏 | Temperature measuring device in stove |
| CN204666271U (en) * | 2015-06-01 | 2015-09-23 | 鑫国集团有限公司 | A kind of blast furnace platinum rhodium thermocouple |
| CN207197691U (en) * | 2017-08-30 | 2018-04-06 | 久茂自动化(大连)有限公司 | A kind of insertion-type thermocouple for melten glass liquid thermometric |
| CN209247191U (en) * | 2019-01-15 | 2019-08-13 | 唐山市丰润区展望自动化设备有限公司 | A kind of thermocouple thermometer |
| CN211696714U (en) * | 2020-04-28 | 2020-10-16 | 安徽春辉仪表线缆集团有限公司 | High-precision platinum-rhodium thermocouple |
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