CN205091284U - A sample accredited testing organization for heating up line method measurement fibre coefficient of heat conductivity - Google Patents
A sample accredited testing organization for heating up line method measurement fibre coefficient of heat conductivity Download PDFInfo
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- CN205091284U CN205091284U CN201520544202.2U CN201520544202U CN205091284U CN 205091284 U CN205091284 U CN 205091284U CN 201520544202 U CN201520544202 U CN 201520544202U CN 205091284 U CN205091284 U CN 205091284U
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Abstract
The utility model relates to a sample accredited testing organization for heating up line method measurement fibre coefficient of heat conductivity, including a glass slide, from bottom to top sets gradually the first sample unit on a glass slide, sensor probes, second sample unit and the 2nd glass slide, a glass slide and the 2nd glass slide all with hot line method test instrument in hot line length direction parallel, first sample unit is all laid along perpendicular to hot line length direction with second sample unit, sensor probe presss from both sides completely and establishes between first sample unit and second sample unit, and sensor probe passes through the circuit to be connected with hot line method test instrument, still be equipped with the weight on the 2nd glass slide. Compared with the prior art, the utility model has the advantages that the whole structure is simple it is single, the simple operation, and do not destroy the inner structure of sample, and the test is stable, can effectively improve coefficient of heat conductivity's measuring accuracy, and the test result deviation is about 5%, and the practicality is good, and the cost of manufacture is low.
Description
Technical field
The utility model belongs to material thermal conductivity determination techniques field, relates to a kind of sample test mechanism of measuring fiber coefficient of heat conductivity for heat-pole method.
Background technology
Fibrous material has length breadth ratio 10 because of it
3doubly above, feature that thickness is the flexible elongated of several microns to up to a hundred microns, not only can textile process, and can as inserts, strengthen matrix or directly form porosint, or combination formation rigidity or flexible composite.Fibrous material is widely used the engineering fields such as Aero-Space, medical treatment, military affairs, the energy, building, increasing to the demand of its coefficient of heat conductivity data.Therefore, the coefficient of heat conductivity of fibrous material is measured, evaluated heat conductivility, and to forming the equal important role of method of testing of heat-pole method measurement fibrous material coefficient of heat conductivity.
At present, the preparation method of sample for measuring fiber coefficient of heat conductivity mainly utilizes resin embedding loose fiber bundle, the heat conduction parameter of test embedded block, and utilizes mathematical method to calculate the coefficient of heat conductivity of fiber.The method of resin embedding loose fiber bundle, can obtain the coefficient of heat conductivity of parallel fibers bundle axial (or radial).But the weak point of the method is: the stretched straight parallel degree varies of fiber in embedding medium, and be mixed into air content instability; Secondly, the coefficient of heat conductivity of embedding medium is reduced to fiber coefficient of heat conductivity and matrix coefficient of heat conductivity by volume weighted mean, calculates fiber coefficient of heat conductivity and also can there are some errors; Finally, data processing and computation process are also comparatively loaded down with trivial details.
In recent years, in unsteady method, heat-pole method is the method generally used measuring non-conducting solid coefficient of heat conductivity and thermal diffusion coefficient, and is a kind of International Standards Method unique in thermal conductivity measurement method under high temperature.Its measuring principle there is a desirable unlimited thin and linear thermal source (i.e. hot line) for endless in supposition solid dielectric, under this line heat source effect, line heat source itself and environment temperature will rise, and the speed that line heat source temperature rises will depend on the size of its surrounding medium coefficient of heat conductivity.And the sample being applicable to heat-pole method does not need the flaky material of given shape and specific dimensions (maximal side is not less than 3cm, and minimum edge is grown up in 1cm).
Utility model content
The purpose of this utility model is exactly provide a kind of structure simple to overcome defect that above-mentioned prior art exists, and easy to operate, practicality is good, effectively can improve the sample test mechanism of measuring fiber coefficient of heat conductivity for heat-pole method of thermal conductivity measurement accuracy.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of sample test mechanism of measuring fiber coefficient of heat conductivity for heat-pole method, this sample test mechanism is used for heat-pole method testing tool, described sample test mechanism comprises the first glass slide, be successively set on the first sample cell on the first glass slide from bottom to top, sensor probe, second sample cell and the second glass slide, the first described glass slide and the second glass slide are all parallel with the hot line length direction in heat-pole method testing tool, the first described sample cell and the second sample cell are all laid along perpendicular to hot line length direction, described sensor probe is folded between the first sample cell and the second sample cell completely, and described sensor probe is connected with heat-pole method testing tool by circuit, the second described glass slide is also provided with counterweight.
The first described sample cell and the second sample cell are combined by the carrier layer set gradually from top to down, tack coat and fibrage respectively.
Described carrier layer is heat conduction silicon chip.
Described heat conduction silicon chip is square heat conduction silicon chip.
Described tack coat is double faced adhesive tape tack coat.
Described double faced adhesive tape tack coat is laid in the surrounding of carrier layer.
Described fibrage is that ultimate fibre to be tested is arranged parallel to each other the plane fibers bundle layer formed, and described to be tested filamentary axis is vertical with hot line length direction.
The first described glass slide and the second glass slide are Pyrex slide glass.
In the utility model, in the first sample cell and the second sample cell, carrier layer is the high and stable lamellar material of heat conductivility.Because heat-pole method requires it is not very strict to sample size, but for ensureing the stability of test data and the simplicity of sample preparation, with sample cell can cover heating collimation method sensor for standard, carrier layer is of a size of and long and is widely not less than 30mm, thickness no requirement (NR), sheet surface shape take square as the best.Tack coat is the high and stable double faced adhesive tape of heat conductivility, and the viscosity of this double faced adhesive tape should be moderate, should ensure to cling fibrous bundle, the position of the adjustment fibrous bundle that also will guarantee to do over again.For avoiding the problem that cannot adjust because double faced adhesive tape cohesiveness is large, can only at surrounding or the topical application double faced adhesive tape of carrier layer.Fibrage is that ultimate fibre to be tested is arranged parallel to each other the plane fibers bundle layer formed, and adopts grooming tool to be arranged by fibrous bundle straight, is conducive to ultimate fibre is uniformly distributed on a carrier layer.In actual test process, the position on a carrier layer of the fibrage in sample cell, can adjust arbitrarily as requested.
Compared with prior art, the utility model has following characteristics:
1) ultimate fibre is bondd on a carrier layer successively, make geometric configuration be the fiber assembly that linear fiber is prepared into that geometric configuration is face, and then meet the test request of heat-pole method;
2) owing to arranging counterweight on the second glass slide, can guarantee between two sample cells and transducer probe face without clearance, prevent air from getting involved the measurement affecting coefficient of heat conductivity, improve the accuracy of thermal conductivity measurement, simultaneously, sample cell or sensor probe can also be avoided because of the existence of air layer, and temperature is too high and impaired;
3) the utility model sample test mechanism one-piece construction is simple, simple operation, and the inner structure not destroying sample, and stable testing, effectively can improve the measuring accuracy of coefficient of heat conductivity, and test result deviation is about ± and 5%, practicality is good, and cost of manufacture is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first sample cell in the utility model;
Description of symbols in figure:
1-carrier layer, 2-tack coat, 3-fibrage.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment:
The present embodiment is used for the sample test mechanism that heat-pole method measures fiber coefficient of heat conductivity, this sample test mechanism is used for heat-pole method testing tool, sample test mechanism comprises the first glass slide, be successively set on the first sample cell on the first glass slide from bottom to top, sensor probe, second sample cell and the second glass slide, first glass slide and the second glass slide are all parallel with the hot line length direction in heat-pole method testing tool, first sample cell and the second sample cell are all laid along perpendicular to hot line length direction, sensor probe is folded between the first sample cell and the second sample cell completely, and sensor probe is connected with heat-pole method testing tool by circuit, second glass slide is also provided with counterweight.
As shown in Figure 1, the first sample cell is made up of carrier layer 1, tack coat 2 and fibrage 3.Second sample cell is identical with the composition of the first sample cell, and wherein, carrier layer 1 is 50mm × 50mm heat conduction silicon chip, is purchased from this times, Hangzhou that company limited; Tack coat 2 is solid double faced adhesive tape, is provided by 3M company; Fibrage 3 is the plane fibers bundle layer that ultimate fibre to be tested is arranged parallel to each other and formed, and filamentary axis to be tested is vertical with hot line length direction.
In the present embodiment, ultimate fibre to be tested is polyester filament (1100D/790F), the solid thermal collimation method coefficient of heat conductivity instrument that heat-pole method instrument is developed by Xi'an Xiatech Electronic Technology Co., Ltd..
When carrying out the testing experiment of coefficient of heat conductivity, first, first glass slide is placed on desktop, again the first sample cell is placed on the first glass slide, sensor probe is put on the first sample cell, keep sensor probe smooth, sensor probe can not depart from sample, and hot line length direction and fiber axis are to vertical; Secondly, second sample cell and hot line length direction are kept vertical, and cover completely on sensor probe, put the second glass slide again, first sample cell and the second sample cell can not depart from sensor probe, can not sensor probe be exposed to outside sample cell, hot line length direction should with two pieces of glass slide keeping parallelisms; Then, second glass slide is placed the counterweight of a 1000g, to guarantee between two sample cells and transducer probe face without clearance, prevent air from getting involved the measurement affecting coefficient of heat conductivity, simultaneously, avoid sample cell or sensor probe because of the existence of air layer, temperature is too high and impaired; Finally, open data acquisition software, preliminary judgement is carried out to the setting of the test parameters such as experimental voltage and acquisition time, and the Δ T ~ lnt curve drawn by observing preliminary experiment the data obtained carries out the adjustment of test parameters.At the beginning, curve is not linear, slightly after a period of time, there will be good rectilinearity in test.Choose time and temperature range that linearly good one section of curve is corresponding, in this, as the basis of design of data acquisition time and experimental voltage.An experimental point every 5min test once, is tested 5 times altogether, is got its mean value.
In the present embodiment, the first glass slide and the second glass slide are Pyrex slide glass.
Carried out reperformance test to polylith same sample, coefficient of heat conductivity result is at 0.2624-0.2802Wm
-1k
-1between, test result deviation, about ± 5%, illustrates that the test result of the sample test mechanism of the present embodiment to stablize, reliably, is feasible with this test sample to fiber Determination of conductive coefficients.
Claims (7)
1. measure the sample test mechanism of fiber coefficient of heat conductivity for heat-pole method for one kind, this sample test mechanism is used for heat-pole method testing tool, described sample test mechanism comprises the first glass slide, be successively set on the first sample cell on the first glass slide from bottom to top, sensor probe, second sample cell and the second glass slide, the first described glass slide and the second glass slide are all parallel with the hot line length direction in heat-pole method testing tool, the first described sample cell and the second sample cell are all laid along perpendicular to hot line length direction, described sensor probe is folded between the first sample cell and the second sample cell completely, and described sensor probe is connected with heat-pole method testing tool by circuit, the second described glass slide is also provided with counterweight, it is characterized in that, the first described sample cell and the second sample cell are respectively by the carrier layer set gradually from top to down, tack coat and fibrage combine.
2. a kind of sample test mechanism of measuring fiber coefficient of heat conductivity for heat-pole method according to claim 1, it is characterized in that, described carrier layer is heat conduction silicon chip.
3. a kind of sample test mechanism of measuring fiber coefficient of heat conductivity for heat-pole method according to claim 2, it is characterized in that, described heat conduction silicon chip is square heat conduction silicon chip.
4. a kind of sample test mechanism of measuring fiber coefficient of heat conductivity for heat-pole method according to claim 1, it is characterized in that, described tack coat is double faced adhesive tape tack coat.
5. a kind of sample test mechanism of measuring fiber coefficient of heat conductivity for heat-pole method according to claim 4, it is characterized in that, described double faced adhesive tape tack coat is laid in the surrounding of carrier layer.
6. a kind of sample test mechanism of measuring fiber coefficient of heat conductivity for heat-pole method according to claim 1, it is characterized in that, described fibrage is that ultimate fibre to be tested is arranged parallel to each other the plane fibers bundle layer formed, and described to be tested filamentary axis is vertical with hot line length direction.
7. a kind of sample test mechanism of measuring fiber coefficient of heat conductivity for heat-pole method according to claim 1, it is characterized in that, the first described glass slide and the second glass slide are Pyrex slide glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520544202.2U CN205091284U (en) | 2015-07-24 | 2015-07-24 | A sample accredited testing organization for heating up line method measurement fibre coefficient of heat conductivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520544202.2U CN205091284U (en) | 2015-07-24 | 2015-07-24 | A sample accredited testing organization for heating up line method measurement fibre coefficient of heat conductivity |
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| Publication Number | Publication Date |
|---|---|
| CN205091284U true CN205091284U (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520544202.2U Expired - Fee Related CN205091284U (en) | 2015-07-24 | 2015-07-24 | A sample accredited testing organization for heating up line method measurement fibre coefficient of heat conductivity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784758A (en) * | 2016-03-18 | 2016-07-20 | 上海工程技术大学 | Fiber heat conductivity determination method |
| CN106645277A (en) * | 2016-10-20 | 2017-05-10 | 北京航空航天大学 | Tester for testing fiber axial heat conduction performance and production method thereof |
-
2015
- 2015-07-24 CN CN201520544202.2U patent/CN205091284U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784758A (en) * | 2016-03-18 | 2016-07-20 | 上海工程技术大学 | Fiber heat conductivity determination method |
| CN106645277A (en) * | 2016-10-20 | 2017-05-10 | 北京航空航天大学 | Tester for testing fiber axial heat conduction performance and production method thereof |
| CN106645277B (en) * | 2016-10-20 | 2019-11-22 | 北京航空航天大学 | A kind of test specimen and preparation method thereof for fiber axis guide thermal performance test |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160316 Termination date: 20190724 |
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| CF01 | Termination of patent right due to non-payment of annual fee |