CN213748806U - Thermocouple fixing device on sample cell - Google Patents
Thermocouple fixing device on sample cell Download PDFInfo
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- CN213748806U CN213748806U CN202022928422.9U CN202022928422U CN213748806U CN 213748806 U CN213748806 U CN 213748806U CN 202022928422 U CN202022928422 U CN 202022928422U CN 213748806 U CN213748806 U CN 213748806U
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Abstract
The utility model relates to a thermocouple fixing device on a sample cell, wherein a differential thermocouple is formed by serially welding a plurality of thermocouples, the unwelded parts of each thermocouple are respectively wrapped together after being insulated, and welding spots between adjacent thermocouples are exposed outside; one end of the differential thermocouple is fixed on the sample cell, welding spots exposed outside the end are respectively coated with an insulating material layer, and the insulating material layer is wrapped and insulated by a polymer material layer; the welding spots wrapping the high polymer material layer are one group or divided into a plurality of groups, the welding spots in each group are wrapped together, heat-conducting glue is coated outside the insulated high polymer material layer, and each group of welding spots coated with the heat-conducting glue is inserted into the thermocouple fixing tube for curing; the thermocouple sleeve is fixedly connected to the sample cell, and each group of welding spots and the thermocouple fixing tube which are solidified into a whole through the heat-conducting adhesive are inserted into the thermocouple sleeve for fixing. The utility model discloses the thermal contact is good, can normally work under 600K, and has the plug convenience, and stability is good, advantage that can use for a long time.
Description
Technical Field
The utility model belongs to the calorimetric device field in the calorimetric department, specifically speaking are thermocouple fixing device on sample cell.
Background
The heat capacity is the basic thermal matter property and theoretical analysis data of the matter, and the accurate measurement of the heat capacity can obtain various standard thermodynamic functions of the matter at different temperatures, such as enthalpy change, entropy change and Gibbs free energy change, and can also obtain microscopic information of the matter structure, phase change mechanism, purity of the matter and the like. To date, adiabatic calorimetry experimental techniques have been considered to be the most accurate and direct method of determining the heat capacity of a substance. The sample pool is used as a core component of the calorimeter, and the temperature difference between the sample pool and the heat insulation screen directly influences the formation of a heat insulation environment, so that the accuracy of a measurement result is influenced. However, the differential thermocouple on the sample cell needs to be pasted and fixed again every time a sample is loaded and taken, and the reliability of the measurement result is affected by the slightly different pasting positions and the different dosage of the pasting adhesive tapes. Moreover, most of the adhesive tapes have failure problems after the adhesive tapes exceed 550K, and the accuracy of a measurement result is seriously influenced. Therefore, the thermocouple fixing mode on the sample cell is optimized, so that the thermocouple fixing mode is suitable for adiabatic calorimetry research of a medium-temperature area, and the thermocouple fixing mode also has the advantages of good thermal contact, convenience in plugging and unplugging, good stability and long-term use and is very important.
SUMMERY OF THE UTILITY MODEL
Get the sample and all need paste the above-mentioned problem that the poor thermocouple of demonstration on the fixed sample cell and lead to again to current dress at every turn, the utility model aims to provide a thermocouple fixing device on sample cell that normal work, thermal contact are good under 600K, it is convenient to have the plug, and stability is good, but the advantage of long-term use.
The purpose of the utility model is realized through the following technical scheme:
the utility model comprises a differential thermocouple, a thermocouple fixing tube and a thermocouple sleeve, wherein the differential thermocouple is formed by welding a plurality of thermocouples in series, the parts which are not welded by each thermocouple are respectively insulated and then wrapped together, and welding spots between adjacent thermocouples are exposed outside; one end of the differential thermocouple is fixed on the sample cell, the welding spots exposed outside the end are respectively coated with an insulating material layer, and the insulating material layer is wrapped and insulated by a polymer material layer; the welding spots wrapping the high polymer material layer are one group or divided into a plurality of groups, the welding spots in each group are wrapped together, heat-conducting glue is coated outside the insulating high polymer material layer, and each group of welding spots coated with the heat-conducting glue is inserted into the thermocouple fixing tube for curing; the thermocouple sleeve is fixedly connected to the sample cell, and each group of welding spots and the thermocouple fixing tube which are solidified into a whole through the heat-conducting adhesive are inserted into the thermocouple sleeve for fixing.
Wherein: the differential thermocouple comprises a thermocouple fixing tube, a thermocouple sleeve, a differential thermocouple, a sample cell and a differential thermocouple, wherein the thermocouple fixing tube and the thermocouple sleeve are respectively provided with two thermocouple fixing tubes and two thermocouple sleeve tubes, the differential thermocouple is formed by sequentially welding six pairs of thermocouples in series, unwelded parts of the six pairs of thermocouples are respectively insulated and then wrapped together, one end, fixed on the sample cell, of the differential thermocouple is provided with six welding spots, and the six welding spots are divided into two groups and three welding spots in each group; three outer coating insulating material layers in each group and welding points wrapping the high polymer material layers are wrapped together and coated with the heat-conducting glue; two groups of welding spots coated with heat-conducting glue are respectively inserted into the two thermocouple fixing tubes for curing, and the two cured thermocouple fixing tubes are respectively inserted into the two thermocouple sleeves for fixing.
The thermocouple fixing tube is a hollow cylinder made of metal or alloy materials, the inner diameter of the thermocouple fixing tube is 1-2 mm, the wall thickness of the thermocouple fixing tube is 0.2-1 mm, and the length of the thermocouple fixing tube is 5-15 mm.
The thermocouple sleeve is a hollow cylinder made of metal or alloy materials, the inner diameter of the thermocouple sleeve is 1.2-3 mm, the wall thickness of the thermocouple sleeve is 0.2-1 mm, and the length of the thermocouple sleeve is 5-15 mm.
The utility model discloses an advantage does with positive effect:
1. the utility model discloses can normally work under 600K, the temperature measurement is accurate, and stability is good.
2. The utility model discloses a differential thermocouple is fixed firm, and the plug is convenient.
3. The utility model discloses can use for a long time, need not change, improve experiment repeatability and reliability.
Drawings
Fig. 1 is a schematic structural view of the present invention;
wherein: 1 is a differential thermocouple, 2 is a thermocouple fixing tube, 3 is heat-conducting glue, and 4 is a thermocouple sleeve.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The thermocouple 1 is composed of two conductors, and electromotive force is generated in a loop by utilizing different temperatures of welding points of the two conductors, and then is processed and converted into temperature difference through a data acquisition control unit. The utility model discloses a thermocouple fixing device, which comprises a differential thermocouple 1, a thermocouple fixing tube 2 and a thermocouple sleeve 4, wherein the differential thermocouple 1 is used for detecting the temperature difference between a sample cell and a heat insulation screen and is matched with the thermocouple fixing tube 2; the differential thermocouple 1 is formed by serially welding a plurality of thermocouples, the parts of the thermocouples which are not welded are respectively wrapped together after being insulated, the welding spots are respectively coated with insulating material layers, and the insulating material layers are wrapped and insulated through polymer material layers; the welding spots wrapping the high polymer material layer are one group or divided into a plurality of groups, the welding spots in each group are wrapped together, heat-conducting glue 3 is coated outside the insulated high polymer material layer, and each group of welding spots coated with the heat-conducting glue 3 is inserted into the thermocouple fixing tube 2 for curing; the thermocouple well 4 is fixedly connected to the sample cell, and each group of welding spots and the thermocouple fixing tube 2 which are solidified into a whole through the heat-conducting glue 3 are inserted into the thermocouple well 4 for fixing.
As shown in fig. 1, the thermocouple fixing tube 2 and the thermocouple sleeve 4 of the present embodiment are two, the differential thermocouple 1 is formed by sequentially welding six pairs of thermocouples in series, unwelded parts of the six pairs of thermocouples are wrapped together, one end of the differential thermocouple 1 fixed on the sample cell has six welding spots exposed outside, and the six welding spots are divided into two groups, each group having three welding spots; and the three welding spots in each group are insulated by using an insulating material respectively, and finally, the three welding spots are wrapped and insulated by using a high polymer material with good insulation property respectively. Wrapping the insulated welding points together, and coating heat-conducting glue 3; two sets of solder joints that scribble heat conduction glue 3 insert respectively two thermocouple fixed tubes 2 in the solidification, after the solidification is accomplished, will insert the heat conduction glue 3 clean up that overflows in the fixed tube 2 in-process of thermocouple. And finally, respectively inserting the welding spots on the thermocouples fixedly connected into a whole, the thermocouple fixing tubes 2 and the heat conducting glue 3 into the two thermocouple sleeves 4 through the two thermocouple fixing tubes 2 for fixing. At this point the differential thermocouple fixation in the sample cell is complete. The insulating material of the embodiment can be insulating paint; the high polymer material with good insulation property can be polytetrafluoroethylene. The heat-conducting glue 3 is good in heat conductivity, good in electrical insulation performance, ageing resistance and electric leakage resistance, can be continuously used at 600K, keeps performance, does not swell, has good adhesion to most of metals and non-metals, and does not have phase change; the thermally conductive adhesive 3 of this example is a commercially available product, and is available from shilin polymer limited, ltd.
The thermocouple of the embodiment is made of metal which can generate higher electromotive force after being subjected to temperature, has high resistivity, good conductivity, small thermal capacity, stable physical and chemical properties and thermoelectric properties after being used for a long time, good mechanical properties and uniform material, such as nickel chromium and copper cuff. The thermocouple fixing tube 2 of the present embodiment is made of metal or alloy with high thermal conductivity, high temperature resistance, stable chemical property and good mechanical property, the metal is copper or silver, and the alloy is brass. The thermocouple fixing tube 2 of the embodiment is a hollow cylinder, the inner diameter is 1-2 mm, the wall thickness is 0.2-1 mm, and the tube length is 5-15 mm. The thermocouple sleeve 4 is made of metal or alloy with high thermal conductivity, high temperature resistance, stable chemical property and good mechanical property, the metal is copper and silver, and the alloy is brass. The thermocouple sleeve 4 of the present embodiment is a hollow cylinder, the inner diameter is 1.2 to 3mm, the wall thickness is 0.2 to 1mm, and the tube length is 5 to 15 mm.
Claims (4)
1. A thermocouple fixing device on a sample cell is characterized in that: the thermocouple temperature difference measuring device comprises a differential thermocouple (1), a thermocouple fixing tube (2) and a thermocouple sleeve (4), wherein the differential thermocouple (1) is formed by serially welding a plurality of thermocouples, the unwelded parts of the thermocouples are respectively insulated and then wrapped together, and welding points between adjacent thermocouples are exposed outside; one end of the differential thermocouple (1) is fixed on the sample cell, the welding points exposed outside the end are respectively coated with an insulating material layer, and the insulating material layer is wrapped and insulated by a polymer material layer; the welding spots wrapping the high polymer material layer are one group or divided into a plurality of groups, the welding spots in each group are wrapped together, heat-conducting glue (3) is coated outside the insulating high polymer material layer, and each group of welding spots coated with the heat-conducting glue (3) is inserted into the thermocouple fixing tube (2) for curing; the thermocouple sleeve (4) is fixedly connected to the sample cell, and each group of welding points and the thermocouple fixing tube (2) which are solidified into a whole through the heat-conducting adhesive (3) are inserted into the thermocouple sleeve (4) for fixing.
2. The thermocouple installation in a sample cell of claim 1, wherein: the differential thermocouple comprises a thermocouple fixing tube (2), a thermocouple sleeve (4), a differential thermocouple (1), a differential thermocouple, a sample cell and a differential thermocouple, wherein the thermocouple fixing tube (2) and the thermocouple sleeve (4) are respectively two, the differential thermocouple (1) is formed by sequentially welding six pairs of thermocouples in series, the parts, which are not welded, of the six pairs of thermocouples are respectively insulated and then wrapped together, one end, fixed on the sample cell, of the differential thermocouple (1) has six welding points, and the six welding points are divided into two groups and three welding points in each group; three outer coating insulating material layers in each group and welding points wrapping the high polymer material layers are wrapped together and coated with the heat-conducting glue (3); two groups of welding points coated with heat-conducting glue (3) are respectively inserted into the two thermocouple fixing tubes (2) for curing, and the two cured thermocouple fixing tubes (2) are respectively inserted into the two thermocouple sleeves (4) for fixing.
3. The thermocouple installation in a sample cell of claim 1, wherein: the thermocouple fixing tube (2) is a hollow cylinder made of metal or alloy materials, the inner diameter is 1-2 mm, the wall thickness is 0.2-1 mm, and the tube length is 5-15 mm.
4. The thermocouple installation in a sample cell of claim 1, wherein: the thermocouple sleeve (4) is a hollow cylinder made of metal or alloy materials, the inner diameter is 1.2-3 mm, the wall thickness is 0.2-1 mm, and the tube length is 5-15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022928422.9U CN213748806U (en) | 2020-12-07 | 2020-12-07 | Thermocouple fixing device on sample cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022928422.9U CN213748806U (en) | 2020-12-07 | 2020-12-07 | Thermocouple fixing device on sample cell |
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| Publication Number | Publication Date |
|---|---|
| CN213748806U true CN213748806U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022928422.9U Active CN213748806U (en) | 2020-12-07 | 2020-12-07 | Thermocouple fixing device on sample cell |
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|---|---|
| CN (1) | CN213748806U (en) |
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- 2020-12-07 CN CN202022928422.9U patent/CN213748806U/en active Active
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