SU149256A1 - A device for determining the thermal properties of rocks and building materials - Google Patents
A device for determining the thermal properties of rocks and building materialsInfo
- Publication number
- SU149256A1 SU149256A1 SU642050A SU642050A SU149256A1 SU 149256 A1 SU149256 A1 SU 149256A1 SU 642050 A SU642050 A SU 642050A SU 642050 A SU642050 A SU 642050A SU 149256 A1 SU149256 A1 SU 149256A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- rocks
- determining
- thermal properties
- building materials
- heater
- Prior art date
Links
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Description
где: л - а - Кз - а5 - Д/ - коэффициент теплопроводности испытуемой горной породы; коэффициент температуропроводности; коэффициент теплопроводности эталона - резины, из которой сделан прибор; коэффициент температуропроводности резины; разность температур в плоскост х, наход щихс от нагревател : одна из них на рассто нии б, а друга - в бесконечУ а t У а., №where: l - a - Kz - a5 - D / - coefficient of thermal conductivity of the tested rock; thermal diffusivity; coefficient of thermal conductivity of the standard - rubber, from which the device is made; coefficient of thermal diffusivity of rubber; the temperature difference in the planes located from the heater: one of them is at a distance b, and the other is infinite and t aa.
Л- 2,/г terfc - Л ,-, L- 2, / g terfc - L, -,
где 7о - тепловыделение с единицы площади нагревател .where 7o - heat generation per unit area of the heater.
Прибор представл ет собой резиновый цилиндр /, на основании которого , прижимаемом к исследуемому материалу 2, вделан плоский нагревательный элемент 3. Нагревательный элемент выполнен из константанового провода диаметром 0,1 мм и защищен с наружной стороны тонким слоем лакотника 4. На определенном рассто нии от нагревател в цилиндре расположены два плоских термометра 5 н 6 сопротивлени . Термометры сопротивлени - медные (диаметр проволочки 0,05 мм) и каждый из них имеет сопротивление по 350 ом.The device is a rubber cylinder /, on the basis of which, flattened heating element 3 is pressed against test material 2, the heating element is made of constantan wire with a diameter of 0.1 mm and is protected from the outside with a thin layer of lacquer 4. At a certain distance from heater in the cylinder are two flat thermometers 5 n 6 resistance. Resistance thermometers are copper (wire diameter 0.05 mm) and each of them has a resistance of 350 ohms.
В рабочем положении цилиндр основанием прижимаетс к испытуемому материалу. На электронагреватель подаетс ток от батареи и отсчитываетс по мостику Дг. Определенна таким образом величинаIn the working position, the cylinder is pressed against the material under test by a base. An electric current is supplied to the electric heater from the battery and measured across the bridge Dg. Thus determined value
- подставл етс в формулу и определ етс ее значение.- is substituted into the formula and its value is determined.
Предмет изобретени Subject invention
Прибор дл определени термических свойств горных пород иA device for determining the thermal properties of rocks and
строительных материалов по величине-77, вычисл емой по распространению тепла в измерительном цилиндре, отличающийс тем, что, с целью получени термических свойств в естественных услови х без вз ти образцов, в измерительном цилиндре, выполненном из резины , около основани , прижимаемого к исследуемому материалу, заделан электронагревательный элемент, за которым на фиксированных рассто ни х расположены два плоских термометра. 2 У а, V-t 149256- 2 ности в некоторый момент «т, величина К - в этом случае -дл Д(рнного нагревател и определенной группы горных пород Ёл етс посто нной и вычисл етс один раз по формуле:building materials in terms of the value-77 calculated by the heat propagation in the measuring cylinder, characterized in that, in order to obtain thermal properties under natural conditions without taking samples, in a measuring cylinder made of rubber, near the base, pressed to the material under study , an electric heating element is embedded, behind which two flat thermometers are located at fixed distances. 2 A, V-t 149256-2 at some moment "t, the value of K is, in this case, length D (the actual heater and a certain group of rocks is Yo-yo constant and is calculated once using the formula:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU642050A SU149256A1 (en) | 1959-10-21 | 1959-10-21 | A device for determining the thermal properties of rocks and building materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU642050A SU149256A1 (en) | 1959-10-21 | 1959-10-21 | A device for determining the thermal properties of rocks and building materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU149256A1 true SU149256A1 (en) | 1961-11-30 |
Family
ID=48304416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU642050A SU149256A1 (en) | 1959-10-21 | 1959-10-21 | A device for determining the thermal properties of rocks and building materials |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU149256A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3971246A (en) * | 1972-12-21 | 1976-07-27 | Showa Denko Kabushiki Kaisha | Method and apparatus for measuring the coefficient of thermal conductivity of a sample |
-
1959
- 1959-10-21 SU SU642050A patent/SU149256A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3971246A (en) * | 1972-12-21 | 1976-07-27 | Showa Denko Kabushiki Kaisha | Method and apparatus for measuring the coefficient of thermal conductivity of a sample |
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