CN203720120U - Device for testing axial heat conductivity coefficient of tubular material - Google Patents
Device for testing axial heat conductivity coefficient of tubular material Download PDFInfo
- Publication number
- CN203720120U CN203720120U CN201420034147.8U CN201420034147U CN203720120U CN 203720120 U CN203720120 U CN 203720120U CN 201420034147 U CN201420034147 U CN 201420034147U CN 203720120 U CN203720120 U CN 203720120U
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- Prior art keywords
- tubular material
- measured
- conductivity coefficient
- thermal conductivity
- ring
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Abstract
The utility model discloses a device for testing an axial heat conductivity coefficient of a tubular material, and belongs to the field of heat conductivity coefficient testing. The device comprises an annular heater arranged between the end faces of two tubular material to be tested which are made of a same material and are completely identical in appearance and size, wherein a heat radiating ring is arranged at one end, which is far away from the annular heater, of each tubular material to be tested, the annular heater is a ring-shaped sheet, the inner diameter and the outer diameter of the annular heater are identical to those of the tubular materiasl to be tested, at least one temperature measuring element is adhered onto the outer walls of two ends of each tubular material to be tested, the temperature measuring elements at each end are uniformly distributed along a ring parallel to the end face of the corresponding tubular material to be tested, and the temperature measuring elements are connected with a temperature display instrument through a lead. According to the device, the problem of measurement of the axial heat conductivity coefficient of the tubular material with the heat transfer property anisotropism is solved, and the problem of measurement errors caused by heat loss of the heater is prevented by adopting a method of symmetrically arranging the two samples to be tested.
Description
Technical field
The utility model belongs to Determination of conductive coefficients field, is specifically related to a kind of device of testing tubular material axial thermal conductivity coefficient.
Background technology
Experimental measurement is to obtain the main method of material thermal conductivity.According to temperature in experimental measurement process over time situation be mainly divided into steady state method and Transient Method (or claiming dynamic method) two large classes.Steady state method comprises heat flow meter method, protection hot plate method, pipe method etc.; Transient Method comprises heat-pole method, Hot-strip Method, normal power heat resource method, the laser method etc. that shines.It is clear that steady state method has principle, can accurately, directly obtain the feature of coefficient of heat conductivity, is applicable to the measurement of wider warm area, and its principle is to utilize under steady state heat transfer condition rate of heat transfer to equal rate of heat dispation to carry out heat conducting coefficient measuring.Transient Method is the thermal conductivity measurement method of exploitation in nearly decades, be used for the measurement of high thermal conductivity coefficient or under hot conditions, sample carried out to Measured Results of Thermal Conductivity, its principle is the temperature temporal evolution of sample in measuring isotropy Heat Conduction Material process, by measuring this variation, calculates coefficient of heat conductivity.Other steady state method except pipe method and Transient Method all can only be for tabular or columnar material Determination of conductive coefficients, can not be for tubular material Determination of conductive coefficients.Existing pipe method is for tubular material Determination of conductive coefficients radially.Also there is no at present tubular material axial thermal conductivity coefficient testing method.
Utility model content
The utility model is to propose in order to overcome the shortcoming youngster who exists in prior art, its objective is a kind of device of testing tubular material axial thermal conductivity coefficient is provided.
The technical solution of the utility model is:
Test a device for tubular material axial thermal conductivity coefficient, comprise the ring heater being arranged between two materials and the end face of the identical tubular material to be measured of apparent size, described tubular material to be measured is provided with heat dissipating ring away from one end of ring heater; Described ring heater is circular thin slice, and the internal diameter of ring heater is identical with internal diameter and the external diameter of tubular material to be measured with external diameter; On the outer wall at described tubular material to be measured two ends, be all pasted with and be no less than three temperature elements, the temperature element of every one end is all uniform along the annulus parallel with tubular material end face to be measured; Described temperature element is connected with temperature display meter by lead-in wire.
Described ring heater is connected with heating controller, reometer and external power source by wire, in parallel with voltage table.
Described ring heater adopts thin film heater, and its inside is resistance heating wire, and outside is silicone insulation layer.
The thickness of described ring heater is not more than 2mm.
Described heat dissipating ring is for adopting the good metallic aluminium of heat transfer property, copper or stainless steel to make Thin ring plate.
The internal diameter of described heat dissipating ring is less than the internal diameter of tubular material to be measured, and the external diameter of heat dissipating ring is greater than the external diameter of tubular material to be measured.
Described temperature element adopts high-precision platinum resistor.
The end face of described tubular material to be measured is smooth smooth, and end face is vertical with axis.
The position of the temperature element of pasting on described two tubular materials to be measured is identical.
The beneficial effects of the utility model are:
The utility model has solved the anisotropic tubular material axial thermal conductivity of heat transfer property coefficient and has measured problem, adopts two methods that sample to be tested is arranged symmetrically with, and has avoided well heater thermal loss to cause measuring error problem.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of testing the device of tubular material axial thermal conductivity coefficient of the utility model.
Wherein:
1, ring heater 2, heat dissipating ring
3, temperature element 4, temperature display meter
5, heating controller 6, reometer
7, voltage table 8, external power source
9, tubular material to be measured.
Embodiment
Below in conjunction with drawings and the specific embodiments, a kind of device of testing tubular material axial thermal conductivity coefficient of the utility model is elaborated:
As shown in Figure 1, a kind of device of testing tubular material axial thermal conductivity coefficient, comprise the ring heater 1 being arranged between two materials and the end face of the identical tubular material 9 to be measured of apparent size, described tubular material 9 to be measured is provided with heat dissipating ring 2 away from one end of ring heater 1; Described ring heater 1 is circular thin slice, and the internal diameter of ring heater 1 is identical with internal diameter and the external diameter of tubular material 9 to be measured with external diameter; On the outer wall at described tubular material to be measured 9 two ends, be all pasted with and be no less than three temperature elements 3, the temperature element 3 of every one end is all uniform along the annulus parallel with tubular material 9 end faces to be measured; Described temperature element 3 is connected with temperature display meter 4 by lead-in wire.
Described ring heater 1 is connected with heating controller 5, reometer 6 and external power source 8 by wire, in parallel with voltage table 7.
Described ring heater 1 adopts thin film heater, and its inside is resistance heating wire, and outside is silicone insulation layer.
The thickness of described ring heater 1 is not more than 2mm.
Described heat dissipating ring 2 is for adopting the good metallic aluminium of heat transfer property, copper or stainless steel to make Thin ring plate.
The internal diameter of described heat dissipating ring 2 is less than the internal diameter of tubular material 9 to be measured, and the external diameter of heat dissipating ring 2 is greater than the external diameter of tubular material 9 to be measured.
Described temperature element 3 adopts high-precision platinum resistor.
The end face of described tubular material to be measured 9 is smooth smooth, and end face is vertical with axis.
The position of the temperature element 3 of pasting on described two tubular materials 9 to be measured is identical.
A kind of measuring method of testing the device of tubular material axial thermal conductivity coefficient of application the utility model, comprises the steps:
A. make two tubular materials to be measured 9 that material is identical with apparent size, the end face of tubular material 9 to be measured is smooth smooth, and end face is vertical with axis, measures internal diameter r=132.4mm and the external diameter R=134.8mm of tubular material 9 to be measured;
B. on the outer wall at tubular material to be measured 9 two ends, paste six temperature elements 3, the temperature element 3 of every one end is all uniform along the annulus parallel with tubular material 9 end faces to be measured, measures the distance L=30mm between two annulus;
C. two tubular materials 9 to be measured are placed on to the two ends of ring heater 1, two heat dissipating rings 2 are placed on respectively the other end of two tubular materials 9 to be measured, by between temperature element 3 and temperature display meter 4, by lead-in wire, are connected;
D. ring heater 1 is communicated with external power source 8, regulates heating controller 5 to treat and survey tubular material 9 heating;
E. after tubular material 9 temperature stabilizations to be measured, input current I=1.16A and the voltage U=8.15V of measure annular well heater 1, record the temperature value showing near the temperature element 3 on ring heater 1 one side annulus on first tubular material 9 outer walls to be measured, calculate arithmetic mean, be designated as
=38.70 ℃, record the temperature value showing near the temperature element 3 on heat dissipating ring 2 one side annulus on first tubular material 9 outer walls to be measured, calculate arithmetic mean, be designated as
=37.21 ℃; Record the temperature value showing near the temperature element 3 on ring heater 1 one side annulus on second tubular material 9 outer wall to be measured, calculate arithmetic mean, be designated as
=39.40 ℃, record the temperature value showing near the temperature element 3 on heat dissipating ring 2 one side annulus on second tubular material 9 outer wall to be measured, calculate arithmetic mean, be designated as
=38.07 ℃;
F. calculate the axial thermal conductivity coefficient k of tubular material 9 to be measured
z:
The utility model has solved the anisotropic tubular material axial thermal conductivity of heat transfer property coefficient and has measured problem, adopts two methods that sample to be tested is arranged symmetrically with, and has avoided well heater thermal loss to cause measuring error problem.
Claims (9)
1. a device of testing tubular material axial thermal conductivity coefficient, comprise the ring heater (1) being arranged between two materials and the end face of the identical tubular material to be measured of apparent size (9), it is characterized in that: described tubular material to be measured (9) is provided with heat dissipating ring (2) away from one end of ring heater (1); Described ring heater (1) is circular thin slice, and the internal diameter of ring heater (1) is identical with internal diameter and the external diameter of tubular material to be measured (9) with external diameter; On the outer wall at described tubular material to be measured (9) two ends, be all pasted with and be no less than three temperature elements (3), the temperature element of every one end (3) is all uniform along the annulus parallel with tubular material to be measured (9) end face; Described temperature element (3) is connected with temperature display meter (4) by lead-in wire.
2. a kind of device of testing tubular material axial thermal conductivity coefficient according to claim 1, it is characterized in that: described ring heater (1) is connected with heating controller (5), reometer (6) and external power source (8) by wire, in parallel with voltage table (7).
3. a kind of device of testing tubular material axial thermal conductivity coefficient according to claim 1 and 2, is characterized in that: described ring heater (1) adopts thin film heater, and its inside is resistance heating wire, and outside is silicone insulation layer.
4. a kind of device of testing tubular material axial thermal conductivity coefficient according to claim 1 and 2, is characterized in that: the thickness of described ring heater (1) is not more than 2mm.
5. a kind of device of testing tubular material axial thermal conductivity coefficient according to claim 1, is characterized in that: described heat dissipating ring (2) is for adopting the good metallic aluminium of heat transfer property, copper or stainless steel to make Thin ring plate.
6. a kind of device of testing tubular material axial thermal conductivity coefficient according to claim 1 or 5, it is characterized in that: the internal diameter of described heat dissipating ring (2) is less than the internal diameter of tubular material to be measured (9), the external diameter of heat dissipating ring (2) is greater than the external diameter of tubular material to be measured (9).
7. a kind of device of testing tubular material axial thermal conductivity coefficient according to claim 1, is characterized in that: described temperature element (3) adopts high-precision platinum resistor.
8. a kind of device of testing tubular material axial thermal conductivity coefficient according to claim 1, is characterized in that: the end face of described tubular material to be measured (9) is smooth smooth, and end face is vertical with axis.
9. a kind of device of testing tubular material axial thermal conductivity coefficient according to claim 1, is characterized in that: the position of the upper temperature element (3) of pasting of described two tubular materials to be measured (9) is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420034147.8U CN203720120U (en) | 2014-01-20 | 2014-01-20 | Device for testing axial heat conductivity coefficient of tubular material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420034147.8U CN203720120U (en) | 2014-01-20 | 2014-01-20 | Device for testing axial heat conductivity coefficient of tubular material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203720120U true CN203720120U (en) | 2014-07-16 |
Family
ID=51159260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420034147.8U Withdrawn - After Issue CN203720120U (en) | 2014-01-20 | 2014-01-20 | Device for testing axial heat conductivity coefficient of tubular material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203720120U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713013A (en) * | 2014-01-20 | 2014-04-09 | 核工业理化工程研究院 | Device for testing axial heat conduction coefficient of tubular material |
| CN107271476A (en) * | 2017-05-03 | 2017-10-20 | 华南理工大学 | Electric machine iron core axial thermal conductivity coefficient test device and method of testing |
| CN112730511A (en) * | 2020-12-28 | 2021-04-30 | 合肥工业大学 | Detection device and method for measuring wall surface heat transfer coefficient of air duct |
-
2014
- 2014-01-20 CN CN201420034147.8U patent/CN203720120U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713013A (en) * | 2014-01-20 | 2014-04-09 | 核工业理化工程研究院 | Device for testing axial heat conduction coefficient of tubular material |
| CN103713013B (en) * | 2014-01-20 | 2015-09-23 | 核工业理化工程研究院 | Test tubulose material shaft is to the device of coefficient of heat conductivity |
| CN107271476A (en) * | 2017-05-03 | 2017-10-20 | 华南理工大学 | Electric machine iron core axial thermal conductivity coefficient test device and method of testing |
| CN107271476B (en) * | 2017-05-03 | 2023-05-23 | 华南理工大学 | Motor iron core axial heat conductivity coefficient testing device and testing method |
| CN112730511A (en) * | 2020-12-28 | 2021-04-30 | 合肥工业大学 | Detection device and method for measuring wall surface heat transfer coefficient of air duct |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140716 Effective date of abandoning: 20150923 |
|
| RGAV | Abandon patent right to avoid regrant |