CN201203589Y - Thermal conduction coefficient low-temperature measuring device with locking mechanism - Google Patents
Thermal conduction coefficient low-temperature measuring device with locking mechanism Download PDFInfo
- Publication number
- CN201203589Y CN201203589Y CNU2008200749195U CN200820074919U CN201203589Y CN 201203589 Y CN201203589 Y CN 201203589Y CN U2008200749195 U CNU2008200749195 U CN U2008200749195U CN 200820074919 U CN200820074919 U CN 200820074919U CN 201203589 Y CN201203589 Y CN 201203589Y
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- coefficient
- temperature
- heat conductivity
- low temperature
- cold drawing
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Abstract
The utility model provides a thermal coefficient low temperature measuring device with a locking mechanism, which comprises a control part and a detection part, a guard board is provided with a refrigerating circulating unit around, and the push screw rod of a cold board push part is provided with a locking component. Since the device uses a refrigerating circulating unit, the ambient temperatures of a hot board and the guard board are lowered, such that the working temperatures of the hot board and the guard board are lower than room temperature, reaching to the aim that a thermal coefficient is measured at a measuring temperature lower than room temperature. By changing different refrigerating media, different ambient temperatures can be created. A constant fastening force for a sample is realized by the locking component, the measuring result is more accurate, and the reliability of the experiment repeatability is greatly improved. Meanwhile, the application scope of the detecting temperature of the thermal coefficient detector is increased, widely applicable to thermal material production enterprises, related quality detecting departments and units, institutes of higher learning, research institutes and other scientific research units.
Description
Technical field
The utility model relates to the coefficient of heat conductivity low temperature determinator of a kind of detecting instrument, particularly a kind of tight mechanism with lock.
Background technology
The coefficient of heat conductivity of insulation material is to be used for weighing the thermal conduction characteristic of thermal insulation and insulation material and the important parameter of heat-insulating property in industrial circle, the building field, this parameter is to detect by thermal conductivity measuring apparatus, thermal conductivity measuring apparatus is a kind of important material property analytical instrument, its ultimate principle is based on the coefficient of heat conductivity that Fourier's heat transfer theory is measured material, and the performance of thermal insulation and insulation material is determined by material thermal conductivity.Environment when the coefficient of heat conductivity of material depends on the composition, voidage, water absorptivity, water cut, inner structure of material and heat conduction and temperature etc. are all multifactor.Whether the accurate mensuration of coefficient of heat conductivity, for the exploitation of thermal insulation and insulation material with produce significant.Thermal conductivity measuring apparatus is the performance of thermal insulation and insulation material and the critical equipment of quality testing, be metering and quality supervised department to the calibrating of material, and R﹠D institution and manufacturer most important means that new material is developed.
Summary of the invention
For overcoming the deficiencies in the prior art, the purpose of this utility model provides a kind of coefficient of heat conductivity low temperature determinator of tight mechanism with lock, can under medial temperature or hot plate temperature are lower than the low-temperature condition of room temperature, accurately measure, and can keep the constant power of stepping up, repeat good reliability model.
For achieving the above object, the technical solution adopted in the utility model provides a kind of coefficient of heat conductivity low temperature determinator of tight mechanism with lock, this device includes control part and has the test section of instrument master bucket, instrument bung, backplate, hot plate, cold drawing, with the contacted cold drawing of instrument bung promotion part, wherein: around described backplate, be provided with the refrigerating fluid cycling element, on the propelling leading screw of described cold drawing promotion part, be provided with a locking member.
Effect of the present utility model is to use this device owing to adopted the refrigerating fluid cycling element, can reduce the environment temperature of hot plate and backplate, make hot plate and backplate working temperature can be lower than room temperature, reach and measure the purpose that temperature is lower than mensuration coefficient of heat conductivity under the room temperature condition.And by changing different refrigerants, can create different environment temperatures, as make water, can drop to minimum 0 ℃, use anti freezing solution, can drop to minimum subzero 60 ℃, use liquid nitrogen, can drop to minimum subzero about 195 ℃, and the use liquid helium, can make measurement environment near absolute zero, promptly medial temperature is lower than subzero 250 ℃, and the cold drawing temperature is near absolute zero.Can keep the constant power of stepping up to sample by locking member, make measurement result more accurate, improve the repeatability of test greatly.
Description of drawings
Fig. 1 is a device of the present utility model side structural representation;
Fig. 2 is the A-A cut-open view of Fig. 1.
Among the figure: the insulation material coefficient of heat conductivity low temperature determinator Facad structure figure of tight mechanism with lock,
1, hollow coil pipe 2, backplate 3, hot plate 4, cold drawing
5, instrument master bucket 6, instrument bung 7, locking member 8, cold drawing promotion part
Embodiment
Further specify below in conjunction with the coefficient of heat conductivity low temperature assay device structures of drawings and Examples tight mechanism with lock of the present utility model.
As shown in Figure 1, 2, the coefficient of heat conductivity low temperature assay device structures of tight mechanism with lock of the present utility model is: this device includes control part and has the test section of instrument master bucket 5, instrument bung 6, backplate 2, hot plate 3, cold drawing 4, with instrument bung 6 contacted cold drawing promotion parts, around described backplate 2, be provided with the refrigerating fluid cycling element, be provided with a locking member 7 on the propelling leading screw of described cold drawing promotion part 8, described locking member 7 is a set nut.
Described refrigerating fluid cycling element is hollow coil pipe 1, also can be the groove of coiling.The cross section of described hollow coil pipe 1 is the shape of one of flute profile, butterfly.Described hollow coil pipe is set up in parallel for one or more coil pipe.
The coefficient of heat conductivity low temperature determinator of tight mechanism with lock of the present utility model is achieved in that
When test specimen is measured first, test specimen is put into instrument master bucket 5, instrument bung 6 closes, advance cold drawing promotion part 8, heave slightly, locking member 7 just is stuck on the bung 6 up to bung 6 walls, tighten locking member 7, note the distance that cold drawing promotion part 8 advances with this.When this test specimen is measured once more, cold drawing promotion part 8 is advanced to locking member 7 determined positions, can guarantee like this when repeatedly measuring, test specimen to be kept constant clamping force.
After placing test specimen and tightening locking member 7, connect control part, open external refrigeration plant groove jar simultaneously, its temperature is set at the required cold drawing temperature of test, make refrigerating fluid flow into hollow coil pipe 1 and cold drawing 4 along pipeline.Open the required cold and hot plate temperature of executive routine input test simultaneously, and click the temperature monitoring button environment temperature and cold drawing 4, backplate 2, hot plate 3 temperature in the instrument master bucket 5 are monitored.Instrument master bucket 5 inner casings 2, hot plate 3 ambient heat can be taken away by the refrigerating fluid in the hollow coil pipe 1 in this process, gradually the environment temperature in the lowering apparatus master bucket 5.After environment temperature in the instrument master bucket 5 is lower than hot plate temperature 10 degree that set, can click to begin to test and carry out official test, the test specimen coefficient of heat conductivity is measured.
The present embodiment experimental applications is as follows:
1, the making of test specimen:
Thickness H=20mm (standard), maximum is no more than 45mm
Area 300 * 300 ± 2 (mm * mm), flatness＜=0.005mm
2, test specimen is placed:
1) test specimen is put into instrument master bucket 5, built instrument bung 6 and locking.
2) advance cold drawing promotion part 8 to make cold drawing 4 promote test specimen near hot plate 3, advance cold drawing promotion part 8 to correct position, promptly hot plate 3 equals specimen thickness with the distance of cold drawing 4, and locking member 7 is stuck on the instrument bung 6, tightens locking member 7.With placing second test specimen with quadrat method; Test specimen is placed and is finished, and prepares to begin test.
3, energized AC220v.
4, the refrigeration plant groove is provided with
Open refrigeration plant groove jar, it is that cold drawing is provided with temperature that refrigeration plant groove jar output temperature is set.
5, computer operation
Open computer power supply, enter the main interface of operation automatically; According to prompting, enter and measure the interface; Before formal the measurement, carry out following work:
(1) with click " specimen thickness ", input actual (real) thickness value (mm);
(2) in " parameter is set " input cold drawing temperature;
(3) at " parameter is set " input hot plate temperature (standard be cold drawing temperature+20 ℃);
(4), environment temperature in the instrument master bucket 5 is monitored with click " temperature monitoring ";
(5) after environment temperatures are lower than hot plate temperature 10 degree are set in the instrument master bucket 5, " begin to test ", enter automatic running status, finish behind the 180Min, provide the result with click.
The utility model uses advanced hardware and software technology, has reached in the measurement temperature to be lower than room temperature, even near the purpose of accurately measuring coefficient of heat conductivity under the condition of absolute zero, has improved the range of application and the measuring accuracy of domestic thermal conductivity measuring apparatus greatly.The utility model can be widely used in manufacturing enterprise, correlated quality inspection department and the R﹠D institutions such as unit, institution of higher learning and research institute of insulation material.
Claims (5)
1, a kind of coefficient of heat conductivity low temperature determinator of tight mechanism with lock, this device includes control part and has the test section of instrument master bucket, instrument bung, backplate, hot plate, cold drawing, with the contacted cold drawing of instrument bung promotion part, it is characterized in that: around described backplate (2), be provided with the refrigerating fluid cycling element, on the propelling leading screw of described cold drawing promotion part (8), be provided with a locking member (7).
2, the coefficient of heat conductivity low temperature determinator of tight mechanism with lock according to claim 1 is characterized in that: described refrigerating fluid cycling element is hollow coil pipe (1) or coiling groove.
3, the coefficient of heat conductivity low temperature determinator of tight mechanism with lock according to claim 2, it is characterized in that: the cross section of described hollow coil pipe (1) is the shape of one of flute profile, butterfly.
4, according to the coefficient of heat conductivity low temperature determinator of claim 2 or 3 described tight mechanisms with lock, it is characterized in that: described hollow coil pipe is that many coil pipes are set up in parallel.
5, the coefficient of heat conductivity low temperature determinator of tight mechanism with lock according to claim 1 is characterized in that: described locking member (7) is a set nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200749195U CN201203589Y (en) | 2008-06-02 | 2008-06-02 | Thermal conduction coefficient low-temperature measuring device with locking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200749195U CN201203589Y (en) | 2008-06-02 | 2008-06-02 | Thermal conduction coefficient low-temperature measuring device with locking mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201203589Y true CN201203589Y (en) | 2009-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200749195U Expired - Fee Related CN201203589Y (en) | 2008-06-02 | 2008-06-02 | Thermal conduction coefficient low-temperature measuring device with locking mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915778A (en) * | 2010-07-19 | 2010-12-15 | 中国建筑科学研究院 | Apparatus and method for measuring thermal coefficients by adopting guarded thermal plate method |
| CN101738414B (en) * | 2009-12-22 | 2013-04-24 | 大连水产学院 | Device for testing low-temperature heat conduction rate of foam heat insulation material in loaded state |
| CN105136652A (en) * | 2015-08-22 | 2015-12-09 | 浙江鑫宙竹基复合材料科技有限公司 | Frost heaving adaptability test method of bamboo composite pressure tube under freeze-thawing cycle |
-
2008
- 2008-06-02 CN CNU2008200749195U patent/CN201203589Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738414B (en) * | 2009-12-22 | 2013-04-24 | 大连水产学院 | Device for testing low-temperature heat conduction rate of foam heat insulation material in loaded state |
| CN101915778A (en) * | 2010-07-19 | 2010-12-15 | 中国建筑科学研究院 | Apparatus and method for measuring thermal coefficients by adopting guarded thermal plate method |
| CN105136652A (en) * | 2015-08-22 | 2015-12-09 | 浙江鑫宙竹基复合材料科技有限公司 | Frost heaving adaptability test method of bamboo composite pressure tube under freeze-thawing cycle |
| CN105136652B (en) * | 2015-08-22 | 2017-10-13 | 浙江鑫宙竹基复合材料科技有限公司 | Frost heave adaptive testing method of the bamboo composite pressure pipe under Frozen-thawed cycled effect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090304 Termination date: 20110602 |