CN202974902U - Heat-conductivity coefficient test device of material - Google Patents
Heat-conductivity coefficient test device of material Download PDFInfo
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- CN202974902U CN202974902U CN 201220462056 CN201220462056U CN202974902U CN 202974902 U CN202974902 U CN 202974902U CN 201220462056 CN201220462056 CN 201220462056 CN 201220462056 U CN201220462056 U CN 201220462056U CN 202974902 U CN202974902 U CN 202974902U
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Abstract
The utility model discloses a heat-conductivity coefficient test device of a material. The heat-conductivity coefficient test device of the material comprises a heat plate heating system, a cold plate cooling system, an electric lifting system, a heat flow metering system, an electric control and measurement system and an industrial personal computer software control system, wherein the heat plate heating system is horizontally arranged; a core plate, a protective plate and a back plate of the heat plate heating system comprise heating resistor plates and metal panels; the external size of the protective plate is 550mm*550mm; the electric lifting system comprises a support rod, a lifting supporter, a screw and a drive motor; the lifting support rod drives the heat plate to lift; and the lifting support rod can be separated from the heat plate. The heat-conductivity coefficient test device of the material is suitable for testing a plate insulating material for building, wherein the thickness of the plate insulating material (taken as a test specimen) is smaller than 100mm and the thermal resistance of the plate insulating material is greater than 0.1m<2>.K/W. The heat-conductivity coefficient test device of the material is high in temperature control accuracy, short in detection cycle, accurate in test result, and can test a soft material easily, and can effectively avoid the influence caused by edge heat loss and drift of a heat flow meter.
Description
Technical field
The utility model belongs to the material property detection field, relate to the detection to tabular thermal insulation material coefficient of heat conductivity for building or thermal resistance, be specifically related to a kind of with formed temperature field simulation one dimensional heat transfer principle between hot plate (comprising central layer, protective shield, backboard) and cold drawing, simultaneously with the electric weight of pulse signal metering test specimen short time accumulative total to calculate the material thermal conductivity proving installation of heat flux.
Background technology
Coefficient of heat conductivity is one of main thermal of building materials, and method of testing commonly used is the steady state test method at present, comprises protective heat plate method and heat flow meter method.Also can be divided into double-test-piece method and single Specimen Method from test specimen quantity.During test, all test specimen is put between cold-hot plate, and based on one-dimensional steady-state heat transfer principle metering the parameters such as the heat flux by test specimen, metering area, cold-hot plate temperature, thereby calculate the coefficient of heat conductivity of measured material.Wherein the heat flow meter method is for adopting the heat flux sensor metering by the heat flux of test specimen, and the protective heat plate method is that the electric power that consumes of metering core board heating apparatus and central layer area draw the heat flux by test specimen.The existing coefficient of heat conductivity checkout equipment of these class methods that adopts mostly is protective shield size 300mm * 300mm at present, the metering core board size is that 150mm * 150mm and sample are the vertical equipment of placing, and the mode of heat flux metering simultaneously is the electric power method of heat flow meter method or test DC voltage and electric current.Cause the internal temperature field distribution uneven and place because sample is vertical in actual test, protective shield up and down temperature consistance is restive, particularly the protective shield size is little causes because the edge thermal loss is difficult to test thick test specimen and the heat flow meter method limitation such as easily drift about, make the material thermal conductivity test accuracy be difficult to guarantee, and restricted large to the specimen thickness scope.Through investigation, hot plate (comprising central layer, backplate and backboard) and cold drawing horizontal positioned have been there is no at present, protective shield is of a size of 550mm * 550mm, the metering core board size is 300mm * 300mm, and heat flux metering mode is the pulse signal metering method, and hot plate adopts the coefficient of heat conductivity detector of Motorized lift device.
Summary of the invention
The purpose of this utility model is to provide a kind of suitable test specimen thickness less than 100mm, thermal resistance is high greater than the temperature control precision of 0.1m2K/W, sense cycle is short, test result is accurate, and can effectively avoid the impact of edge thermal loss and heat flow meter drift, be easy to simultaneously test the material thermal conductivity proving installation of flexible material.
The purpose of this utility model is to be achieved through the following technical solutions:
A kind of material thermal conductivity proving installation comprises: hot plate heating system, cold drawing cooling system, electric lifting system, heat flux metering system, electrical control and measuring system and industrial computer software control system; The hot plate heating system is horizontally disposed with and is positioned at above the cold drawing cooling system.The central layer of described hot plate heating system, protective shield and backboard include heating resistor film and metal decking.Heating resistor film is two hot side well heaters, and each panel of hot plate heating system is horizontally disposed with and is positioned at above the cold drawing cooling system, and each panel material of hot plate is aluminium alloy.
Described central layer is metering units, is comprised of the thermal resistance sheet of 256mm * 256mm and the central layer panel of 300mm * 300mm;
Described protective shield panel outside dimension is 550mm * 550mm, the protective shield panel with " three-back-shaped " around central layer panel surrounding and and central layer between be provided with the wide space of 3mm;
Described backplane panel outside dimension is 550mm * 550mm, and is identical with protective shield panel outside dimension, backboard above central layer and protective shield and and protective shield and central layer between adopt the thick thermal insulation material of 50mm of even thermal resistance heat insulation.
Described cold drawing cooling system comprises refrigeratory and cold drawing panel, and the cold drawing panel is horizontally disposed with, and cold drawing panel material is aluminium alloy.
Described refrigeratory comprises at least one cover semiconductor chilling plate and heat abstractor, and semiconductor chilling plate is evenly arranged in below the cold drawing panel, and is provided with thermofin between semiconductor chilling plate.Cold drawing panel outside dimension is identical with the protective shield panel, is 550mm * 550mm.Heat abstractor comprises heat radiator and radiator fan.
Described semiconductor chilling plate is double-deck cooling piece, be of a size of 40mm * 40mm * 8mm, operating voltage is DC6V～32V, the utility model is designed to when the cold drawing temperature during higher than 10 ℃ of set temperatures, adopt the 12V power supply, the cold drawing temperature only in 2 ℃ the time, adopts the 6V power supply higher than set temperature, all the other states are the 9V power supply, and semiconductor chilling plate adopts this notch cuttype operating voltage can make cold drawing cooling system fast and stable when test reach the test setting temperature.
Described electric lifting system comprises pole, lifting holder, leading screw, drive motor; Wherein leading screw is arranged on the drive motor top and drives the lifting holder and moves, and lifting is simultaneously entrusted moving two ends and propped up the pole pair hot plate application of force; Be provided with between lifting pole and hot plate and can break away from syndeton.For hard material, after test specimen contact with test when hot plate, lifting pole broke away from hot plate, and hot plate is put forth effort on above the test test specimen with deadweight; For soft material, lifting pole is fixed hot plate and cold drawing spacing, lifts hot plate with lifting pole.
Described heat flux is measured system, comprising: central layer electric power measurement device, electric pulse converter, step-by-step counting collector.This system is for converting the electric energy of central layer well heater consumption to pulse signal by the electric pulse converter, and the pulse number in the unit interval that recycling pulse measurement collector produces during with the different materials steady state heat transfer carries out digital collection storage (the zero clearing when pulse signal that at every turn gathers gathers next time) in the unit interval.
Described electrical control and measuring system comprise: electromagnetic relay, 32 tunnel output quantity switch integrated circuit boards, 15 road temperature analog signal modules and 1 tunnel pulse measurement acquisition module, 12VDC and 24VDC power supply, 485 and the RS232 converter.The work such as this system completes mainly that the conversion of each strong and weak electricity, software instruction are carried out, the conversion of sensors A/D signal and input and output.
The industrial computer software control system, it mainly completes work such as detecting sampling time interval, testing time, testing conditions setting and stable condition setting (four groups of data deviations after follow-on test), the work such as transmission that realize simultaneously the system data storage of (comprising temperature and number of pulses), calculating, temperature curve, be embedded in each cold-hot plate inner sensor space temperature stereographic map, each system allow instruction.
Hot plate heating system, cold drawing cooling system all adopt PID to control, and all are embedded with at least one temperature sensor, 5 of preferred central layers, 4 of protective shields, 1 of backboard in each panel of central layer, protective shield and the backboard of hot plate heating system.
The utlity model has following beneficial effect:
1. the utility model adopts electric lifting system, utilizing lifting pole to drive hot plate moves up and down, for hard material, lifting pole can break away from hot plate, make hot plate put forth effort on test test specimen top with deadweight, make the snap-in force that puts on the test test specimen stablize and can reappear, and pressure is not more than 2.5kPa; For soft material, lifting pole is fixed hot plate and cold drawing spacing, lifts hot plate with lifting pole, is easy to test flexible material, makes measured material not produce large deformation so that affects its thermal property.
2. protective shield outside dimension of the present utility model is 550mm * 550mm, can effectively avoid testing the edge thermal loss of test specimen, and increases the thickness range of testable test specimen, and the present invention is fit to the specimen thickness of test less than 100mm.
3. heat flux metering of the present utility model system adopts the pulse signal metering method, convert the electric energy of central layer well heater consumption to pulse signal by the electric pulse converter, and utilize the pulse measurement collector that the pulse number in the unit interval is carried out the digital collection storage, can greatly shorten sense cycle, avoid the easily shortcoming of drift of heat flow meter method.
4. hot plate heating system of the present utility model, cold drawing cooling system all adopt PID to control, all be embedded with temperature sensor in each panel of central layer, protective shield and the backboard of hot plate heating system, wherein 5 of central layers, 4 of protective shields, 1 of backboard, make temperature control precision high, and test result is accurate.
Description of drawings
Fig. 1 is material thermal conductivity proving installation schematic appearance;
Fig. 2 is material thermal conductivity proving installation rack and jacking system schematic diagram
Fig. 3 is hot plate heating system schematic appearance;
Fig. 4 is hot plate heating system internal structure schematic diagram;
Fig. 5 is cold drawing cooling system schematic diagram;
Fig. 6 is the electric lifting system structural representation;
Fig. 7 is heat flux metering system works schematic diagram;
Fig. 8 is electrical control and measuring system and industrial computer software control system work schematic diagram.
In figure:
1-hot plate heating system; The 11-central layer; The 12-protective shield; The 13-backboard; 111-central layer heating resistor film; 121-protective shield heating resistor film; Space between 14-central layer and protective shield; 2-cold drawing cooling system; The 21-refrigeratory; 22-cold drawing panel; The 23-heat radiator; The 24-radiator fan; The 25-thermofin; The 3-electric lifting system; 31-pole; 32-lifting holder; The 33-leading screw; The 34-drive motor; The 4-rack; The 41-working station indicator; The 42-power switch; 43-hot plate direction switch; 44-alternating voltage display screen; The 45-temperature display meter.
Embodiment
Below in conjunction with accompanying drawing and by specific embodiment, the utility model is described in further detail.
As shown in Fig. 1～8, the utility model is fit to the test specimen thickness less than 100mm, and thermal resistance is greater than 0.1m
2The coefficient of heat conductivity of the plate material of K/W or thermal resistance.This test device of thermal conductivity coefficient comprises: hot plate heating system 1, cold drawing cooling system 2, electric lifting system 3, heat flux metering system, electrical control and measuring system and industrial computer software control system.
The hot plate heating system as shown in Figure 3 and Figure 4, comprises central layer 11, protective shield 12 and backboard 13, and each part all with heating resistor film as well heater, and be two hot side well heaters, hot plate panel material is aluminium alloy.Wherein central layer 11 is metering units, is comprised of the heating resistor film 111 of 256mm * 256mm and the central layer panel of 300mm * 300mm, and central layer metering simulation one dimensional heat transfer principle is by the heat flux of test test specimen; Protective shield 12 outside dimensions are 550mm * 550mm for " three-back-shaped " around the central layer surrounding, and and central layer between the wide space 14 of 3mm is arranged, formed by heating resistor film 121 and protective shield panel; Backboard 13 is for being of a size of the square heating plate of 550mm * 550mm, and be positioned at central layer 11 and protective shield 12 tops (as Fig. 1), and adopt the 50mm thermal insulation material of even thermal resistance heat insulation between protective shield and central layer, backboard 13 is comprised of heating resistor film and backplane panel.Above-mentioned hot plate and sample surface of contact flatness well are better than 0.025%, fit tightly with specimen.Central layer 11, protective shield 12 and backboard 13 represent that respectively the position all is embedded with temperature sensor, wherein 5 of central layers, 4 of protective shields, 1 of backboard.And well heater is the PID control model, makes three's temperature deviation not higher than 0.1 degree centigrade, makes the fully approximate one dimensional heat transfer of sample.
Cold drawing cooling system 2 as shown in Figure 5, comprises refrigeratory 21, heat radiator 23, radiator fan 24, thermofin 25 and cold drawing panel 22 (aluminium alloy plate).Wherein cooling piece is that double-deck semiconductor chilling plate and heat abstractor amount to 4 covers and be evenly arranged in cold drawing panel below, and adopts thermal insulation material heat insulation between semiconductor chilling plate.The cold drawing outside dimension is all 550mm * 550mm mutually with hot plate.Cooling system is of a size of 40mm * 40mm * 8mm with the double-deck cooling piece of semiconductor chilling plate, operating voltage is DC6V-32V, the utility model is designed to the cold drawing temperature higher than 10 ℃ of set temperatures, adopt the 12V power supply, the cold drawing temperature is higher than in 2 ℃ of set temperatures, adopt the 6V power supply, all the other states are the 9V power supply, reach the test setting temperature because this notch cuttype operating voltage makes cold drawing fast and stable when testing.
Heat flux metering system as shown in Figure 7, comprising: central layer electric power measurement device, electric pulse converter, step-by-step counting collector.This system converts pulse signal for the electric energy with the consumption of central layer well heater to by the electric pulse converter, pulse number in the unit interval that produces when recycling the pulse measurement collector with the different materials steady state heat transfer carries out digital collection storage (zero clearing during the next collection of the pulse signal that at every turn gathers) in the unit interval, and be converted into by sensitivity the heat flux that average power obtains sample interior, finally by obtain the heat flow density of material divided by the metering area.Because being proportional to the central layer well heater, pulse signal number under the conditions such as central layer power supply parameter and central layer temperature consumes electric energy, so calculate with sensitivity constant.
Electrical control and measuring system as shown in Figure 8, comprise electromagnetic relay, 32 tunnel output quantity switch integrated circuit boards, 15 road temperature analog signal modules and 1 tunnel pulse measurement acquisition module, 12VDC and 24VDC power supply, 485 and the electric original paper such as RS232 converter.The work such as this system completes mainly that the conversion of each strong and weak electricity, software instruction are carried out, the conversion of sensors A/D signal and input and output.This equipment hot plate and cold drawing all adopt PID to control, each point temperature and number of pulses, acquisition time etc. are fully by electrical system control work, and the program that the command source of electrical system arranges in industrial computer software, i.e. acquisition interval, hot plate and cold drawing set temperature and the temperature difference etc.Adopt simultaneously 15 road temperature analog signal modules, one road 4-20mA humidity sensor simulating signal module and the road pulse measurement acquisition module of being connected to connect to be embedded in sensor and the electric pulse converter of ambient temperature and humidity in Pt100 temperature sensor in each panel (precision ± 0.1 ℃), test cabinet, digital signal is shown, calculates and store according to software program.
The industrial computer software control system: this system mainly completes work such as detecting sampling time interval, testing time, testing conditions setting and stable condition setting (four groups of data deviations after follow-on test), the work such as transmission that realize simultaneously the system data storage of (comprising temperature and number of pulses), calculating, temperature curve, be embedded in each cold-hot plate inner sensor space temperature stereographic map, each system allow instruction.This software is provided with the function of automatic decision continuously record data stability, and namely after judgement continuously, four groups of data deviations are not more than 1%, deduct the loaded down with trivial details work of artificial judgement stability.The temperature difference Δ T that is calculated as the hot and cold surface of area A by measuring the one dimension constant heat flux Q (acquisition of unit interval pulse signal) that flows through metering units under steady state (SS), metering units, test specimen of final data test result, can calculate the thermal resistance R of test specimen, according to specimen thickness d, just can calculate accurately the thermal conductivity value of test specimen.
Claims (9)
1. a material thermal conductivity proving installation, comprising: hot plate heating system, cold drawing cooling system, electric lifting system, heat flux metering system, electrical control and measuring system and industrial computer software control system; The hot plate heating system comprises central layer, protective shield and backboard, and the cold drawing cooling system comprises refrigeratory, cold drawing panel, it is characterized in that, hot plate heating system and cold drawing cooling system are horizontally disposed with; Electric lifting system comprises pole, lifting holder, leading screw, drive motor; Wherein leading screw is arranged on the drive motor top and drives the lifting holder and moves, and lifting is simultaneously entrusted moving two ends and propped up the pole pair hot plate application of force.
2. material thermal conductivity proving installation according to claim 1, is characterized in that, is provided with between lifting pole and hot plate to break away from syndeton.
3. material thermal conductivity proving installation according to claim 2, is characterized in that, central layer, protective shield and backboard include heating resistor film and metal decking; Backboard above central layer and protective shield and and protective shield and central layer between adopt thermal insulation material heat insulation; Heating resistor film is two hot side well heaters.
4. material thermal conductivity proving installation according to claim 3, it is characterized in that, each panel material of hot plate is aluminium alloy, and the protective shield outside dimension is 550mm * 550mm, protective shield is centered around the central layer surrounding, is provided with the wide space of 3mm between protective shield panel and central layer panel.
5. material thermal conductivity proving installation according to claim 1 and 2, is characterized in that, hot plate heating system, cold drawing cooling system all adopt PID to control, and all are embedded with at least one temperature sensor in central layer, protective shield and backboard.
6. material thermal conductivity proving installation according to claim 1 and 2, it is characterized in that, described heat flux metering system comprises central layer electric power measurement device, electric pulse converter, step-by-step counting collector, this heat flux metering system converts the electric energy of central layer well heater consumption to pulse signal by the electric pulse converter, and the pulse number in the unit interval that recycling pulse measurement collector produces during with the different materials steady state heat transfer carries out the digital collection storage.
7. material thermal conductivity proving installation according to claim 1 and 2, it is characterized in that, the refrigeratory of cold drawing cooling system comprises at least one cover semiconductor chilling plate and heat abstractor, and cold drawing panel outside dimension is identical with the protective shield panel, and cold drawing panel material is aluminium alloy.
8. material thermal conductivity proving installation according to claim 1 and 2, it is characterized in that, electrical control and measuring system comprise electromagnetic relay, 32 tunnel output quantity switch integrated circuit boards, 15 road temperature analog signal modules and 1 tunnel pulse measurement acquisition module, 12VDC and 24VDC power supply, 485 and the RS232 converter.
9. material thermal conductivity proving installation according to claim 1 and 2, is characterized in that, the test specimen thickness is less than 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220462056 CN202974902U (en) | 2012-09-12 | 2012-09-12 | Heat-conductivity coefficient test device of material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220462056 CN202974902U (en) | 2012-09-12 | 2012-09-12 | Heat-conductivity coefficient test device of material |
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| CN202974902U true CN202974902U (en) | 2013-06-05 |
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| CN 201220462056 Expired - Fee Related CN202974902U (en) | 2012-09-12 | 2012-09-12 | Heat-conductivity coefficient test device of material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411996A (en) * | 2013-08-05 | 2013-11-27 | 电子科技大学 | Measuring equipment and measuring method for heat conductivity coefficients of solid materials |
| CN109490355A (en) * | 2017-09-13 | 2019-03-19 | 大唐移动通信设备有限公司 | A kind of method of test device of thermal conductivity coefficient and heat conducting coefficient measuring |
-
2012
- 2012-09-12 CN CN 201220462056 patent/CN202974902U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411996A (en) * | 2013-08-05 | 2013-11-27 | 电子科技大学 | Measuring equipment and measuring method for heat conductivity coefficients of solid materials |
| CN103411996B (en) * | 2013-08-05 | 2016-03-02 | 电子科技大学 | Solid material heat conductivity measurement mechanism and measuring method |
| CN109490355A (en) * | 2017-09-13 | 2019-03-19 | 大唐移动通信设备有限公司 | A kind of method of test device of thermal conductivity coefficient and heat conducting coefficient measuring |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20210912 |