CN101187643A - Solid-liquid phase change material normal pressure thermal expansion rate and work volume digital measuring device - Google Patents
Solid-liquid phase change material normal pressure thermal expansion rate and work volume digital measuring device Download PDFInfo
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- CN101187643A CN101187643A CNA2007101718688A CN200710171868A CN101187643A CN 101187643 A CN101187643 A CN 101187643A CN A2007101718688 A CNA2007101718688 A CN A2007101718688A CN 200710171868 A CN200710171868 A CN 200710171868A CN 101187643 A CN101187643 A CN 101187643A
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Abstract
The invention discloses a digital measuring device for the heat expansion rate and the working quantity of solid-liquid phase transforming materials under normal pressure, which belongs to the technical field of physical measurement. The invention comprises an inner container, an outer container, an air discharging lock, a pressure sensing device, a water level gauge, a water valve, a sampling control unit, a heat electric couple and an automatic electric heater. The inner container is arranged horizontally inside the outer container, an emulsion film is arranged on one end of the inner container through a compression ring and an O-shaped rubber ring, the inner container is filled fully with measuring actuating medium, the outer container is filled fully with water, the emulsion film is expanded out due to the expansion of the actuating medium as water temperature rises inside the outer container, and water level inside the water level gauge rises. The heat expansion rate and the working quantity of the solid-liquid phase transforming materials under the normal pressure can be calculated out according to liquid levels as volume expansion signals and temperature and pressure signals, performance measurements of the solid-liquid phase transforming materials are provided with convenient and reliable approaches, and the invention has clear scientific values and social benefits. The invention is applicable to materials as n-pentadcane, n-hexadecane, heptadecane, sodium acetate trihydrate, storing thermal paraffin RT 54 which is produced by a German company and the similar materials.
Description
Technical field
The present invention relates to a kind of digital measuring device, particularly a kind of solid-liquid phase change material normal pressure thermal expansion rate and work volume digital measuring device belong to the physical measurement techniques field.
Background technology
Cubical expansivity and the amount of work size thereof of solid-liquid phase change material under temperature variation is the significant data of scientific research.Usually, the cubical expansivity of solid-liquid phase change material under temperature variation measured by artificial reading, hand-kept, can not guarantee the precision measured, can not be connected with computing machine again to carry out digitized processing, more can not make automatic control to improve the efficient of surveying work, make the measurement of phase-change material important performance data that difficulty take place measurement environment.In the prior art, application number is 02277190.5, name is called " a kind of device of measuring the concrete shrinkage rate " utility model patent, mainly finish the distortion that rises when measuring cement, sand-cement slurry, concrete depositing zero, can measure the shrinkage factor in the cast one day after, can not finish the mensuration that phase-change material changes in the different temperatures lower volume, can not finish the mensuration of the work done effect that volume change causes, can't provide digital information for the digital collection system.
Summary of the invention
In order to remedy the deficiencies in the prior art, the invention provides a kind of solid-liquid phase change material normal pressure thermal expansion rate and work volume digital measuring device.This device not only can be gathered under the normal pressure line number word processing of going forward side by side of the Test Information of coefficient of thermal expansion automatically, can control automatically the heating environment of measuring again, can also handle simultaneously and computing the volume-variation signal and the pressure signal of thermal expansion process, obtain the precise information of amount of work, for the performance measurement of solid-liquid phase change material provides convenience, approach reliably.
The present invention is achieved through the following technical solutions.
The present invention includes inner bag, outer courage, air relief cock, pressure transducer, water level gauge sealing socket, water level gauge, draw-off valve, water compensating valve, controlling of sampling unit, thermopair and automatic electric heater.
Inner bag comprises gland, pressure ring, inner bag cylindrical shell and latex film.The inner bag cylindrical shell be one by stainless steel material is made, two ends have internal shoulder cylinder, gland is connected with inner bag cylindrical shell threaded one end by rubber seal, the latex film is seated on the internal shoulder of the inner bag cylindrical shell other end, pressure ring is threaded with the inner bag cylindrical shell other end, O type cushion rubber places between latex film and the pressure ring, makes latex film periphery not leak working medium.Gland is a revolution that has convex shoulder of being made by stainless steel material, and the cylinder of top outer is processed into annular knurl, so that the manual gland that screws.Pressure ring is a shouldered ring-type revolution of being made by stainless steel material, and its top outer cylinder is processed into annular knurl.The latex film has enough elasticity and retractility, and has enough intensity, the surface is fully enlarged also do not break.Air relief cock and pressure transducer are installed in respectively in two screws of internal container cylinder external surface.Air relief cock is one and is processed into the screw that has T type duct by stainless steel material that the aperture of bottom communicates with inner bag inside.When the outside turn of air relief cock, horizontal hole communicates with the external world, can discharge the gas in the inner bag.When air relief cock inwardly screwed, inner bag was hedged off from the outer world, and formed closed cavity.
Outer courage is a rectangular parallelepiped closed cavity that is welded by corrosion resistant plate, does not leak when the 0.5MPa pressure testing.The two sides is equipped with transparent watertight view window before and after the courage outside, and to be convenient for measuring, the left surface of courage is equipped with watertight door outside, is convenient to the taking-up of inner bag and packs into.Two by stainless steel materials make, the upper edge is that recessed semicircular support is installed on the bottom surface in the outer courage, inner bag is horizontally placed on the support.Water compensating valve is communicated with the end face of outer courage by pipeline, with amount of makeup water; Draw-off valve communicates with the bottom surface of outer courage by pipeline, so that drain the water in the outer courage.Thermopair inserts in the outer courage to measure the water temperature in the outer courage.Water level gauge is installed in by the water level gauge sealing socket on the end face of outer courage, and electric heater is installed in the right side inner bottom part of outer courage automatically, so that the water that holds in the outer courage of heating is to reach the temperature of setting.
Water level gauge comprises outer tube, interior pipe, dry type tongue spring tube, precision resistance and magnetic floating ring.A plurality of dry type tongue spring tubes are stacked in the interior pipe of water level gauge from bottom to top, be spaced apart 4mm between per two dry type tongue spring tubes, the number of dry type tongue spring tube is determined according to range of stage, dry type tongue spring tube is encapsulated in the cuvette by two or multi-disc iron-nickel alloy reed and makes, and each dry type tongue spring tube all connects to form series circuit with a precision resistance.The pipe outside in the magnetic floating ring is enclosed within, swim on the water surface, when magnetic floating ring during with water level height wander up and down, the magnetic that the magnetic floating ring is had has been magnetized the restoring moment of corresponding dry type tongue spring tube tongue, thereby make the controlled circuit closure, the resistance value correspondence of series circuit the residing height of magnetic floating ring, the data-signal of output liquid level.Between outer tube and interior pipe, and have two apertures on the outer courage end face of water level gauge sealing socket correspondence position and pass the water level gauge sealing socket, make water in the outer courage can overflow and enter between pipe and the outer tube, the cubical expansivity of the height reflection working medium of its water level.
The output terminal of water level gauge and thermopair all is electrically connected with the input end of controlling of sampling unit, and it is volumetric expansion signal and temperature signal that liquid level signal is provided respectively; The output terminal of pressure transducer is electrically connected with the input end of controlling of sampling unit by the sealing adaptor that is installed in outer courage top, and pressure signal is provided.The control output end of controlling of sampling unit is electrically connected with the signal input end of automatic electric heater.The digital signal output end of controlling of sampling unit is electrically connected with the data input pin of computing machine.
Beginning to test under the working medium normal pressure before the coefficient of thermal expansion, the gland with inner bag one end unloads the working medium to be measured of packing into earlier.If working medium is the solid shape, should use the warm water heat fused earlier, working medium that inner bag is contained is is full of shape; The latex film of the other end slightly is standing shape, promptly the working medium in the inner bag have slightly excessive.After covering and screwing gland, air relief cock is outwards unscrewed, be in deflated state, rotate pressure ring then and push the latex film inwards, the bubble in the working medium is discharged, in the duct of air relief cock, flow out a little working medium, show gas emptying, screw air relief cock immediately, then inner bag is put into outer courage by the watertight door of outer courage, accumbency is on support and make pressure transducer and air relief cock straight up, closes watertight door then.
Open water compensating valve, make in the outer courage to be full of water.By the time the water surface is raised to the basal surface position that covers in the water level gauge and gets final product.Begin formal measurement immediately, record initial temperature and pressure, the closed then power supply of electric heater is automatically write down the initial reading of water level gauge simultaneously.Along with temperature that outer courage is filled with water constantly rises, the latex film of inner bag is continuous bulging because of working medium expands, and water level constantly rises in the water level gauge, and after water temperature arrived setting value, volume no longer changed after working medium fully expanded, and measuring process finishes.
According to the water level gauge reading, the situation of change of volume calculated is asked for the cubical expansivity of working medium, and according to small volume change interval and corresponding force value, is carried out integral and calculating, can ask for the amount of work of each time interval and overall process.
Beneficial effect of the present invention: the present invention has realized automatic sampling and the signal Processing that coefficient of thermal expansion and expansion process amount of work are measured under the phase-change material normal pressure, also provide direct, simple and direct approach for data processing and calculating, this installation cost is cheap, easy to make, simple to operation, be a kind of can apply, measurement mechanism accurately and reliably.The present invention can be that the scientific research relevant with phase-change material provides conscientiously, reliable measurement means, and tangible scientific value and social benefit are arranged.The solid-liquid phase change material that digital measuring device of the present invention was suitable for is a kind of paraffin RT 54 and close material of character that is specifically designed to accumulation of heat that n-pentadecane, n-hexadecane, n-heptadecane, Sodium acetate trihydrate, German Rubitherm company produce.
Description of drawings
Fig. 1 is the structural representation of digital measuring device of the present invention.
Fig. 2 is the structural representation of digital measuring device inner bag of the present invention.
Fig. 3 is the structural representation of digital measuring device water level gauge of the present invention.
Among the figure: 1, inner bag, 2, the latex film, 3, O type cushion rubber, 4, pressure ring, 5, rubber seal, 6, gland, 7, air relief cock, 8, pressure transducer, 9, outer courage, 10, the inner bag cylindrical shell, 11, the water level gauge sealing socket, 12, water level gauge, 13, watertight door, 14, draw-off valve, 15, water compensating valve, 16, support, 17, watertight view window, 18, interior pipe,, 22, the magnetic floating ring, 23, dry type tongue spring tube, 24, precision resistance, 25, outer tube.
Specific embodiments
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
As Fig. 1, Fig. 2, shown in Figure 3, the present invention includes inner bag 1, outer courage 9, air relief cock 7, pressure transducer 8, water level gauge sealing socket 11, water level gauge 12, draw-off valve 14, water compensating valve 15, controlling of sampling unit 19, thermopair 20 and automatic electric heater 21.
Inner bag 1 comprises gland 6, pressure ring 4, inner bag cylindrical shell 10 and latex film 2.Inner bag cylindrical shell 10 be one by stainless steel material is made, two ends have internal shoulder cylinder.Gland 6 is connected with inner bag cylindrical shell 10 threaded one ends by rubber seal 5, latex film 2 is seated on the internal shoulder of inner bag cylindrical shell 10 other ends, pressure ring 4 is threaded with inner bag cylindrical shell 10 other ends, and O type cushion rubber 3 places between latex film 2 and the pressure ring 4, makes latex film 2 peripheries not leak working medium.Gland 6 is revolutions that have convex shoulder of being made by stainless steel material, and the cylinder of top outer is processed into annular knurl, so that the manual gland 6 that screws.Pressure ring 4 is shouldered ring-type revolutions of being made by stainless steel material, and its top outer cylinder is processed into annular knurl.Latex film 2 has enough elasticity and retractility, and has enough intensity, the surface is fully enlarged also do not break.Air relief cock 7 is installed in respectively in two screws of inner bag cylindrical shell 10 outside surfaces with pressure transducer 8.Air relief cock 7 is one and is processed into the screw that has T type duct by stainless steel material that the aperture of bottom communicates with inner bag 1 inside.When the outside turn of air relief cock 7, horizontal hole communicates with the external world, can discharge the gas in the inner bag 1.When air relief cock 7 inwardly screwed, inner bag 1 was hedged off from the outer world, and formed closed cavity.
Outer courage 9 is rectangular parallelepiped closed cavities that are welded by corrosion resistant plate, does not leak when the 0.5MPa pressure testing.Two sides, courage 9 front and back is equipped with transparent watertight view window 17 outside, and to be convenient for measuring, the left surface of courage 9 is equipped with watertight door 13 outside, is convenient to the taking-up of inner bag 1 and packs into.Two by stainless steel materials make, the upper edge is that recessed semicircular support 16 is installed on the interior bottom surface of outer courage 9, inner bag 1 is horizontally placed on the support 16.Water compensating valve 15 is communicated with by the end face of pipeline with outer courage 9, with amount of makeup water; Draw-off valve 14 communicates by the bottom surface of pipeline with outer courage 9, so that drain the water in the outer courage 9.Thermopair 20 inserts in the outer courage 9 to measure the water temperature in the outer courage 9.Water level gauge 12 is installed in by water level gauge sealing socket 11 on the end face of outer courage 9, and electric heater 21 is installed in the right side inner bottom part of outer courage 9 automatically, so that the water that holds in the outer courage 9 of heating is to reach the temperature of setting.
The output terminal of water level gauge 12 and thermopair 20 all is electrically connected with the input end of controlling of sampling unit 19, and it is volumetric expansion signal and temperature signal that liquid level signal is provided respectively; The output terminal of pressure transducer 8 is electrically connected with the input end of controlling of sampling unit 19 by the sealing adaptor that is installed in outer courage 9 tops, and pressure signal is provided.The control output end of controlling of sampling unit 19 is electrically connected with the signal input end of automatic electric heater 21.The digital signal output end of controlling of sampling unit 19 is electrically connected with the data input pin of computing machine.
Beginning to test under the working medium normal pressure before the coefficient of thermal expansion, the gland 6 with inner bag 1 left side unloads the working medium to be measured of packing into earlier.If working medium is the solid shape, should use the warm water heat fused earlier, inner bag 1 working medium of containing is is full of shape; The latex film 2 on right side slightly is standing shape, promptly the working medium in the inner bag 1 have slightly excessive.After covering and screw gland 6, air relief cock 7 is outwards unscrewed, be in deflated state, rotate pressure ring 4 then and push latex film 2 inwards, the bubble in the working medium is discharged, in the duct of air relief cock 7, flow out a little working medium, show gas emptying, screw air relief cock 7 immediately, then inner bag 1 is put into outer courage 9 by the watertight door 13 of outer courage 9, accumbency is on support 16 and make pressure transducer 8 and air relief cock 7 straight up, closes watertight door 13 then.
Open water compensating valve 15, make in the outer courage 9 to be full of water.By the time the water surface is raised to the basal surface position that covers in the water level gauge 12 and gets final product.Begin formal measurement immediately, record initial temperature and pressure, the closed then power supply of electric heater 21 is automatically write down the initial reading of water level gauge 12 simultaneously.Along with outer courage 9 temperature that is filled with water constantly rises, the latex film 2 of inner bag 1 is continuous bulging because of working medium expands, and water levels constantly rise in the water level gauge 12, and after water temperature arrived setting value, volume no longer changed after working medium fully expanded, and measuring process finishes.
According to water level gauge 12 readings, the situation of change of volume calculated is asked for the cubical expansivity of working medium, and according to small volume change interval and corresponding force value, is carried out integral and calculating, can ask for the amount of work of each time interval and overall process.
Claims (6)
1. solid-liquid phase change material normal pressure thermal expansion rate and work volume digital measuring device, comprise: inner bag (1), outer courage (9), air relief cock (7), pressure transducer (8), water level gauge sealing socket (11), water level gauge (12), draw-off valve (14), water compensating valve (15), controlling of sampling unit (19), thermopair (20) and automatic electric heater (21), it is characterized in that: inner bag (1) comprises gland (6), pressure ring (4), inner bag cylindrical shell (10) and latex film (2), gland (6) is connected with inner bag cylindrical shell (10) threaded one end by rubber seal (5), latex film (2) is seated on the internal shoulder of inner bag cylindrical shell (10) other end, pressure ring (4) is threaded with inner bag cylindrical shell (10) other end, O type cushion rubber (3) places between latex film (2) and the pressure ring (4), air relief cock (7) is installed in respectively in two screws of inner bag cylindrical shell (10) outside surface with pressure transducer (8), outer courage (9) is a rectangular parallelepiped closed cavity that is welded by corrosion resistant plate, the two sides is equipped with watertight view window (17) before and after the courage (9) outside, the left surface of courage (9) is equipped with watertight door (13) outside, water compensating valve (15) is communicated with the end face of outer courage (9), draw-off valve (14) communicates with the bottom surface of outer courage (9), and thermopair (20) inserts in the outer courage (9); Water level gauge (12) is installed on the end face of outer courage (9) by water level gauge sealing socket (11), automatically electric heater (21) is installed in the right side inner bottom part of outer courage (9), support (16) is installed on the interior bottom surface of outer courage (9), and inner bag (1) is horizontally placed on the support (16) and makes pressure transducer (8) and air relief cock (7) straight up; The output terminal of water level gauge (12) and thermopair (20) all is electrically connected with the input end of controlling of sampling unit (19), the output terminal of pressure transducer (8) is electrically connected with the input end of controlling of sampling unit (19) by the sealing adaptor that is installed in outer courage (9) top, the control output end of controlling of sampling unit (19) is electrically connected with the signal input end of automatic electric heater (21), and the digital signal output end of controlling of sampling unit (19) is electrically connected with the data input pin of computing machine.
2. solid-liquid phase change material normal pressure thermal expansion rate according to claim 1 and work volume digital measuring device, it is characterized in that described water level gauge (12) comprises outer tube (25), interior pipe (18), dry type tongue spring tube (23), precision resistance (24) and magnetic floating ring (22), a plurality of dry type tongue spring tubes (23) are stacked in the interior pipe (18) from bottom to top, each dry type tongue spring tube (23) all connects to form series circuit with a precision resistance (24), magnetic floating ring (22) is enclosed within interior pipe (18) outside, swims on the water surface; Between outer tube (25) and interior pipe (18), and have two apertures on outer courage (9) end face of water level gauge sealing socket (11) correspondence position and pass water level gauge sealing socket (11).
3. solid-liquid phase change material normal pressure thermal expansion rate according to claim 1 and work volume digital measuring device is characterized in that described inner bag cylindrical shell (10) is the cylinder by stainless steel material is made, two ends have internal shoulder; Pressure ring (4) is the shouldered ring-type revolution of being made by stainless steel material, and its top outer cylinder is processed into annular knurl; Gland (6) is the revolution of being made by stainless steel material that has convex shoulder, and the cylinder of top outer is processed into annular knurl.
4. solid-liquid phase change material normal pressure thermal expansion rate according to claim 1 and work volume digital measuring device, it is characterized in that described air relief cock (7) is to be processed into the screw that has T type duct by stainless steel material, the aperture of bottom communicates with inner bag (1) inside.
5. solid-liquid phase change material normal pressure thermal expansion rate according to claim 1 and work volume digital measuring device is characterized in that described support (16) is that two upper edges that made by stainless steel materials are recessed semicircular supporting structure.
6. solid-liquid phase change material normal pressure thermal expansion rate according to claim 1 and 2 and work volume digital measuring device, it is characterized in that described dry type tongue spring tube (23) is to be encapsulated in the cuvette by two or multi-disc iron-nickel alloy reed to make, the number of dry type tongue spring tube (23) determines according to range of stage, is spaced apart 4mm between per two dry type tongue spring tubes (23).
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| CN2007101718688A CN101187643B (en) | 2007-12-06 | 2007-12-06 | Solid-liquid phase change material normal pressure thermal expansion rate and work volume digital measuring device |
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| CN101975792A (en) * | 2010-09-14 | 2011-02-16 | 中国科学技术大学 | System for testing stability of solid-liquid phase change materials |
| CN102323289A (en) * | 2011-06-16 | 2012-01-18 | 天津大学 | Testing device for solidification reaction shrinkage rate and testing method thereof |
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| CN103018125A (en) * | 2012-06-05 | 2013-04-03 | 济南吉利汽车有限公司 | Device and method for determining expansion rate of expansion damping sealant for automobile welding |
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| CN105403589A (en) * | 2015-12-23 | 2016-03-16 | 芜湖东旭光电装备技术有限公司 | Method for measuring shrinkage of amorphous material |
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| CN101975792B (en) * | 2010-09-14 | 2013-06-26 | 中国科学技术大学 | System for testing stability of solid-liquid phase change materials |
| CN101975792A (en) * | 2010-09-14 | 2011-02-16 | 中国科学技术大学 | System for testing stability of solid-liquid phase change materials |
| CN102323289A (en) * | 2011-06-16 | 2012-01-18 | 天津大学 | Testing device for solidification reaction shrinkage rate and testing method thereof |
| CN102507373A (en) * | 2011-11-07 | 2012-06-20 | 兰州理工大学 | Measuring device and method of melting volume expansion ratio/molten state density of material |
| CN102507373B (en) * | 2011-11-07 | 2014-05-14 | 兰州理工大学 | Measuring device and method of melting volume expansion ratio/molten state density of material |
| CN103018125B (en) * | 2012-06-05 | 2014-09-24 | 济南吉利汽车有限公司 | Device and method for determining expansion rate of expansion damping sealant for automobile welding |
| CN103018125A (en) * | 2012-06-05 | 2013-04-03 | 济南吉利汽车有限公司 | Device and method for determining expansion rate of expansion damping sealant for automobile welding |
| CN103499678B (en) * | 2013-07-23 | 2015-06-03 | 北京交通大学 | Determinator for soil volume expansive force |
| CN103499678A (en) * | 2013-07-23 | 2014-01-08 | 北京交通大学 | Determinator for soil volume expansive force |
| CN105301042A (en) * | 2015-11-20 | 2016-02-03 | 海南中航特玻科技有限公司 | Method using dilatometer to measure electronic flat glass shrinkage |
| CN105403589A (en) * | 2015-12-23 | 2016-03-16 | 芜湖东旭光电装备技术有限公司 | Method for measuring shrinkage of amorphous material |
| CN107976227A (en) * | 2017-11-22 | 2018-05-01 | 山西大学 | A kind of slurry coagulated volume change online testing device and its test method |
| CN107976227B (en) * | 2017-11-22 | 2020-01-03 | 山西大学 | Slurry solidification volume change online testing device and testing method thereof |
| CN110646461A (en) * | 2018-06-27 | 2020-01-03 | 上海梅山钢铁股份有限公司 | Method for measuring continuous cooling phase transition temperature of ultrathin gauge thickness steel plate |
| CN110646461B (en) * | 2018-06-27 | 2022-05-10 | 上海梅山钢铁股份有限公司 | Method for measuring continuous cooling phase transition temperature of ultrathin gauge thickness steel plate |
| CN109521045A (en) * | 2019-01-16 | 2019-03-26 | 广西慧思通科技有限公司 | A kind of 3D printing analogue simulation metal material thermal contraction parameter measuring apparatus |
| CN114705715A (en) * | 2022-06-06 | 2022-07-05 | 天津大学 | Testing device and testing method for phase-change material |
| CN114705715B (en) * | 2022-06-06 | 2022-10-04 | 天津大学 | Testing device and testing method for phase-change material |
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