CN104614282A - High-temperature-fluid density testing device with heating function - Google Patents
High-temperature-fluid density testing device with heating function Download PDFInfo
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- CN104614282A CN104614282A CN201510055733.XA CN201510055733A CN104614282A CN 104614282 A CN104614282 A CN 104614282A CN 201510055733 A CN201510055733 A CN 201510055733A CN 104614282 A CN104614282 A CN 104614282A
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Abstract
The invention discloses a high-temperature-fluid density testing device with a heating function. The high-temperature-fluid density testing device comprises a support device, a crucible furnace, a heating controller, a temperature sensor and a weighing device, wherein a plurality of heating tubes are arranged on a bottom plate in the crucible furnace; a plurality of heat transferring tubes are arranged at the bottom of a crucible; the heating tubes are arranged in the corresponding heat transferring tubes from bottom to top; an upper cover covers on the crucible; a central through hole is formed in the upper cover; the sensing end of the temperature sensor is arranged in the crucible; the heating controller is used for controlling the power of the heating tubes; a housing is arranged on the support device in the weighing device; a housing through hole is formed in the housing; a floater penetrates through the central through hole of the upper cover from top to bottom, is arranged in the crucible and is disposed in an area encircled by the heat transferring tubes; the floater is connected with the sensing end of the weighing sensor by virtue of a floater connection rod; the output end of the weighing sensor penetrates through the housing and then is connected with a processor by virtue of a signal collector. By virtue of the high-temperature-fluid density testing device, the density of a high-temperature fluid working medium can be measured, and the density extreme value of the high-temperature melt can be obtained.
Description
Technical field
The present invention relates to a kind of fluid density proving installation, particularly relate to a kind of high temperature fluid density measurement device with heating function.
Background technology
Material industry, as the basis of development of manufacturing, has become one of major fields of current International Technology and inter-industry competition.Within 2010, State Council of the People's Republic of China has printed and distributed " decision about accelerating cultivation and development strategy new industry ", new material industry is listed in seven great strategy new industries, indicates basic, the key effect of new material in national economy and social development.Afterwards, " 12 " development plan is pointed out to develop new material industry again, and the industrial colonies such as emphasis development of special Metallic Functional Materials.As the crystalline material in functional material with valuable physical characteristics, the conversion of the various form of energy such as electricity, magnetic, sound, light and heat can be realized due to it, being widely used in the middle of the technology such as space flight and aviation, national defense industry, electronic communication, is the indispensable important materials of modern science and technology and industry thereof.Along with industrial expansion, the quality requirements of people to crystalline material is more and more higher, and no matter the crystal of spontaneous growth is in quantity, still far can not meet industrial requirement in quality, therefore be received the great attention of people by manual method grown crystal.Density is the most basic parameter of crystalline material character, and reflecting the degree of material densification, is one of structure sensitive physical property.Be different from the Common fluids that density with temperature linearly reduces, silicon, gallium, germanium, the conventional crystalline material such as HgCdTe and CdZnTe its density when high temperature fused state is not the monotonic quantity of temperature, but a density maximum is there is under a certain specified temp, when this particular value of temperature departure, density all reduces, now, the fluid layer density gradient direction of density maximum both sides is identical with thermograde direction or contrary respectively, form the approximate two whirlpool born of the same parents of intensity or many whirlpools born of the same parents' fluidal texture, it can change temperature field and the distribution of concentration at crystal structure interface, thus affect passing and alloy being uniformly distributed in crystal of growth interface, i.e. macrosegregation.In addition, fluid system extremely unstable, often produces the fluctuation of speed, temperature and concentration in molten bath, and this will cause the change of chemical composition in crystal, causes the appearance of crystal striped, i.e. microsegregation.Microsegregation causes the uneven of crystal property, and produces the uneven of dislocation and stress, even has a strong impact on the performance of crystal.Thus, the change curve of density with temperature during Measurement accuracy crystalline material molten condition (melt), find out the temperature corresponding to density maximum point, in crystal growth, avoid the impact of density inverted character can increase substantially crystal mass and growth scale.In addition, obtaining the density of working medium when higher temperatures is also the calculating of thermodynamic function and the basic parameter of the domain engineering such as inorganic material and metallurgical engineering design.
Present stage, traditional density measurement method was still based on buoyancy method, and testing apparatus mainly comprises float, connecting link, title, beaker, test board etc.During test, the float of certain mass volume is placed in fluid to be measured, has connection cord to connect above float and claim.By claiming to obtain float weight in a liquid, deducting the weight of float in air, obtaining its buoyancy in water.Utilize Archimedes principle, namely the buoyancy of float in water equals the weight of same volume ponding, divided by the volume of float, calculates density.Density calculation formula is:
Measure by buoyancy method Normal Atmospheric Temperature Liquid density comparatively mature and reliable, but this method is used in the measurement of the high temperature fluid density extreme values such as crystalline material melt, but rarely have bibliographical information.Crystalline material melt typical temperature is higher, and conventional fluid density proving installation cannot complete the real-time measurement etc. of working medium density under the heating of working medium to be measured, the control of temperature, different temperatures, and then cannot obtain the density maximum of melt.
The limitation of traditional liquid density measurement device is comparatively large, only can measure the fluid density in normal temperature situation, and is not easy to obtain density of high-temperature melt extreme value.This be due to:
1, conventional density measurement device is only used for measuring Normal Atmospheric Temperature Liquid density, and proving installation is corresponding heating temperatures, temperature control system not, and crystalline material fusing point is usually all higher, and the fusing point of such as silicon is more than 1400 DEG C.Now, Normal Atmospheric Temperature Liquid density measurement device is no longer applicable because of the restriction of its material bearing temperature.Need to design a set of density measurement device for high temperature test environment with temperature value-added tax function.
2, traditional fluid density test adopts off-line measurement, employing mechanical type of weighing, hand-kept, calculated weight.In this case, the fluid density recorded is the density of certain temperature spot.And working medium density is often along with temperature is continuity change, traditional fluid density proving installation cannot detect by real-time synchronization, namely can not Obtaining Accurate density real-time change rule, and then is unfavorable for the determination of working medium density maximum to be measured.
3, traditional float is connected adopts cord to connect with title, this just requires that working medium density to be measured is less than float density and just can measures, and the fusant density of crystalline material is usually larger, general float cannot immerse in a fluid, and cord conventional under hot environment easily blows, cannot play and connect float to transmit the effect of buoyancy, now traditional liquid density measurement system cannot be suitable for.
Summary of the invention
Object of the present invention is just to provide a kind of high temperature fluid density measurement device being applicable to the band heating function of high-melting-point working medium density measure to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of high temperature fluid density measurement device with heating function, comprise bracing or strutting arrangement, also comprise crucible oven, heating controller, temperature sensor and weighing device, described crucible oven comprises base plate, crucible and upper cover, an imaginary circles on the upper surface of described base plate be circumferentially evenly provided with multiple vertical heating tube, circumferentially evenly being provided with of an imaginary circles of the bottom of described crucible is multiplely placed in heat-transfer pipe in described crucible and vertical, the top seal of described heat-transfer pipe and bottom opening, multiple described heating tube is with multiple described heat-transfer pipe one_to_one corresponding and be from bottom to top placed in corresponding described heat-transfer pipe respectively, described upper cover mounts cover on described crucible, the center of described upper cover is provided with central through hole, the induction end of described temperature sensor is placed in described crucible or in the wall of described crucible, the signal input part of described heating controller is connected with the signal output part of described temperature sensor, and the output terminal of described heating controller is connected with the input end of described heating tube, described weighing device comprises shell, float, float connecting rod, LOAD CELLS, signal picker and processor, described shell is placed on described bracing or strutting arrangement, side shell wall on described shell is provided with outer casing through hole, described float to be from top to bottom placed in described crucible through the central through hole of described upper cover and to be positioned at the region that multiple described heat-transfer pipe surrounds, described float is connected with the lower end of described float connecting rod, the upper end of described float connecting rod is connected with the induction end of described LOAD CELLS, the output terminal of described LOAD CELLS is placed in described shell through the outer casing through hole on described shell, the output terminal of described LOAD CELLS is connected with the input end of described signal picker, the output terminal of described signal picker is connected with the input end of described processor.
In said structure, crucible oven be used for as fusing working medium to be measured container, by heating tube heating, heat-transfer pipe heat transfer after, heat is passed in crucible, working medium to be measured is melted in crucible, thus for high-melting-point working medium fluid density test condition is provided; Heating controller determines output current according to the actual temperature detected thus changes the parts of the heat that heating tube produces by changing electric current, and be a kind of conventional components applying maturation, its concrete structure does not repeat them here; Temperature sensor be used for by crucible or the temperature of sidewall of crucible carry out Real-time Collection after be transferred to heating controller; Weighing device is used for measuring the pulling force of float or thrust, thus provides basis for the fluid density of working medium to be measured calculates.
As preferably, described crucible and described heat-transfer pipe are formed in one structure.
As preferably, described base plate, described crucible, described heat-transfer pipe, described upper cover, described float and described float connecting rod are corundum material, and described heating tube is tungsten heating tube.
In order to reduce thermal losses, described crucible oven is coated with thermofin.
For the ease of installing LOAD CELLS, the bottom of the outer casing through hole of described shell is provided with cushion block, and described LOAD CELLS is placed on described cushion block.
For the ease of keeping the initial balance of LOAD CELLS, described LOAD CELLS is connected with sensor balancing weight near the bottom of its output terminal.
Particularly, described LOAD CELLS is resistance strain weighing transducer.
Particularly, described bracing or strutting arrangement comprises base, vertical expansion link, horizontal support platform and platform balancing weight, the lower end of described expansion link is installed on described base, the upper end of described expansion link is connected with described support platform, the shell of described platform balancing weight and described weighing device to be placed in respectively in described support platform and to lay respectively at the both sides of described expansion link, and described float connecting rod is through the platform through hole in described support platform.
As preferably, described expansion link is by mutual sheathing and consist of the upper boom of Bolt to position and lower beam.
For the ease of regulating the quality of balance of support platform, described base is provided with the adjusting screw(rod) for adjusting base balance.
Beneficial effect of the present invention is:
The present invention, by the crucible oven of project organization uniqueness, makes heating tube can be integrated in crucible inside well, and improve heating and heat transfer efficiency, heating tube is separated with working medium to be measured and is convenient to change, and it also avoid working medium to be measured contaminated; By designing supporting heating controller, working medium to be measured being melted in the crucible of crucible oven and insulation and alternating temperature can be realized neatly, thus the density measure of high temperature fluid working medium can be carried out; By float being placed in working fluid to be measured and being connected with LOAD CELLS with hard float connecting rod, the stressing conditions of float at vertical direction is detected in real time, no matter the density of float is greater than or is less than the density of working medium to be measured, real-time online can be realized and detect working medium density, obtain the change curve of working medium density with temperature, and then the convenient density maximum obtaining high-temperature fusant.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of the high temperature fluid density measurement device of band heating function of the present invention;
Fig. 2 is the three-dimensional assembling structure schematic diagram of crucible oven of the present invention;
Fig. 3 is the plan structure schematic diagram after the base plate of crucible oven of the present invention and crucible assembling;
Fig. 4 is the structural representation of weighing device of the present invention, and visual angle is identical with Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As Figure 1-Figure 4, the high temperature fluid density measurement device of band heating function of the present invention comprises bracing or strutting arrangement, crucible oven 5, heating controller 9, temperature sensor 7 and weighing device 4, wherein, described bracing or strutting arrangement comprises base 1, vertical expansion link, horizontal support platform 3 and platform balancing weight 2, base 1 is provided with the adjusting screw(rod) 14 balanced for adjusting base 1, the upper boom 13 that described expansion link is located by mutual sheathing and by bolt 12 and lower beam 11 are formed, the lower end of lower beam 11 is installed on base 1, the upper end of upper boom 13 is connected with support platform 3, platform balancing weight 2 and weighing device 4 to be placed in respectively in support platform 3 and to lay respectively at the both sides of upper boom 13, crucible oven 5 is coated with thermofin 6, crucible oven 5 comprises base plate 56, crucible 54 and upper cover 52, an imaginary circles on the upper surface of base plate 56 be circumferentially evenly provided with multiple vertical heating tube 55, circumferentially evenly being provided with of an imaginary circles of the bottom of crucible 54 is multiplely placed in heat-transfer pipe 53 in crucible 54 and vertical, the top seal of heat-transfer pipe 53 and bottom opening, crucible 54 and heat-transfer pipe 53 are formed in one structure, multiple heating tube 55 is with multiple heat-transfer pipe 53 one_to_one corresponding and be from bottom to top placed in corresponding heat-transfer pipe 53 respectively, upper cover 52 mounts cover on crucible 54, the center of upper cover 52 is provided with central through hole 51, temperature sensor 7 adopts K type thermopair, the induction end of temperature sensor 7 is placed in crucible 54 or in the wall of crucible 54, the signal input part of heating controller 9 is connected with the signal output part of temperature sensor 7, the output terminal of heating controller 9 is connected with the input end of heating tube 55 by heating cables 8, weighing device 4 comprises shell 46, float 42, float connecting rod 41, LOAD CELLS 45, signal picker 48 and processor 49, shell 46 is placed in support platform 3, side shell wall on shell 46 is provided with outer casing through hole (unmarked in figure), the bottom of outer casing through hole is provided with cushion block 44, float 42 to be from top to bottom placed in crucible 54 through the central through hole 51 of upper cover 52 and to be positioned at the region that multiple heat-transfer pipe 53 surrounds, float 42 is connected with the lower end of float connecting rod 41, the upper end of float connecting rod 41 is connected with the induction end of LOAD CELLS 45 by bolt 43 through after the platform through hole (not shown) in support platform 3, the output terminal of LOAD CELLS 45 is placed in shell 46 through the outer casing through hole on shell 46, LOAD CELLS 45 is placed on cushion block 44, the output terminal of LOAD CELLS 45 is connected with the input end of signal picker 48, the output terminal of signal picker 48 is connected with the input end of processor 49, LOAD CELLS 45 is connected with sensor balancing weight 47 near the bottom of its output terminal by bolt 43.Above-mentioned LOAD CELLS 45 is resistance strain weighing transducer, such as can adopt the resistance strain weighing transducer of Wuhan Xi Pu Electronics Co., Ltd.; Above-mentioned base plate 56, crucible 54, heat-transfer pipe 53, upper cover 52, float 42 and float connecting rod 41 are corundum material, and heating tube 55 is tungsten heating tube; Processor 49 can adopt computer.
As applicating example more specifically, in said structure, diameter phi=the 150mm of base plate 56, height h=30mm, be evenly distributed with the tungsten heating tube 55 that totally 8 single tube powers are 5KW along 45 °, the circumferentially interval of φ=80mm above base plate 56, diameter phi=the 20mm of heating tube 55, height h=120mm, heating general power 40KW, heating-up temperature can reach 3000 DEG C at most, be enough at short notice working material to be measured is heated to molten condition, and fixed by embedded mode.Basal diameter φ=the 150mm of crucible 54, sidewall thickness l=10mm, height h=140mm, has external diameter φ=30mm with heating tube 55 corresponding position, the heat-transfer pipe 53 of internal diameter φ=26mm, h=125mm is so that heating tube 55 and the connection of crucible 54 and exchanging for of heating tube 55.External diameter φ=the 150mm of cylindric upper cover 52, internal diameter φ=140mm, height h=30mm, upper cover 52 has the central through hole 51 of φ=50mm.During heating, in order to make heat more effectively utilize, be wrapped with special 1600 types of one deck Aesop Lay at crucible oven 5, thickness is that the thermofin 6 of 300mm outwards dissipates to prevent heat, improves the efficiency of heating surface.
During work, first solid-state working medium to be measured is placed in crucible 54, heating tube 55 is connected by heating cables 8 with heating controller 9, the induction end of temperature sensor 7 is placed in crucible 54, heating controller 9 is by temperature sensor 7 collecting temperature value, and compare with target temperature value, obtain deviation, the heat that heating controller 9 calculates heating output module according to deviation situation loads output number percent, load output duty cycle by regulating heat and upper electrical heating is carried out to heating tube 55, control heating power, reach thermoregulator object.
Float 42 and the highest high temperature bearing 2000 DEG C of float connecting rod 41.Float 42 is the spherical of radius R=20mm, by diameter phi=5mm, the long float connecting rod 41 for L=500mm is connected to LOAD CELLS 45, and passes the central through hole 51 at crucible furnace 5 top, and the height of float 42 can be regulated by the stack height changed between upper boom 13 and lower beam 11.Float 42 be subject to fluid working substance to be measured to lifting force or downwards pulling force all change electric signal transmission into signal picker 48 by LOAD CELLS 45, be transferred to processor 49 after signal picker 48 processing signals and show.The method that processor 49 calculates working fluid density to be measured according to the signal of LOAD CELLS 45 is the method that existing maturation is applied, and does not repeat them here.
Above-described embodiment is preferred embodiment of the present invention; it is not the restriction to technical solution of the present invention; as long as without the technical scheme that creative work can realize on the basis of above-described embodiment, all should be considered as falling within the scope of the rights protection of patent of the present invention.
Claims (10)
1. the high temperature fluid density measurement device with heating function, comprise bracing or strutting arrangement, it is characterized in that: also comprise crucible oven, heating controller, temperature sensor and weighing device, described crucible oven comprises base plate, crucible and upper cover, an imaginary circles on the upper surface of described base plate be circumferentially evenly provided with multiple vertical heating tube, circumferentially evenly being provided with of an imaginary circles of the bottom of described crucible is multiplely placed in heat-transfer pipe in described crucible and vertical, the top seal of described heat-transfer pipe and bottom opening, multiple described heating tube is with multiple described heat-transfer pipe one_to_one corresponding and be from bottom to top placed in corresponding described heat-transfer pipe respectively, described upper cover mounts cover on described crucible, the center of described upper cover is provided with central through hole, the induction end of described temperature sensor is placed in described crucible or in the wall of described crucible, the signal input part of described heating controller is connected with the signal output part of described temperature sensor, and the output terminal of described heating controller is connected with the input end of described heating tube, described weighing device comprises shell, float, float connecting rod, LOAD CELLS, signal picker and processor, described shell is placed on described bracing or strutting arrangement, side shell wall on described shell is provided with outer casing through hole, described float to be from top to bottom placed in described crucible through the central through hole of described upper cover and to be positioned at the region that multiple described heat-transfer pipe surrounds, described float is connected with the lower end of described float connecting rod, the upper end of described float connecting rod is connected with the induction end of described LOAD CELLS, the output terminal of described LOAD CELLS is placed in described shell through the outer casing through hole on described shell, the output terminal of described LOAD CELLS is connected with the input end of described signal picker, the output terminal of described signal picker is connected with the input end of described processor.
2. the high temperature fluid density measurement device of band heating function according to claim 1, is characterized in that: described crucible and described heat-transfer pipe are formed in one structure.
3. the high temperature fluid density measurement device of band heating function according to claim 2, it is characterized in that: described base plate, described crucible, described heat-transfer pipe, described upper cover, described float and described float connecting rod are corundum material, described heating tube is tungsten heating tube.
4. the high temperature fluid density measurement device of band heating function according to claim 1, is characterized in that: described crucible oven is coated with thermofin.
5. the high temperature fluid density measurement device of band heating function according to claim 1, it is characterized in that: the bottom of the outer casing through hole of described shell is provided with cushion block, described LOAD CELLS is placed on described cushion block.
6. the high temperature fluid density measurement device of band heating function according to claim 1, is characterized in that: described LOAD CELLS is connected with sensor balancing weight near the bottom of its output terminal.
7. the high temperature fluid density measurement device of the band heating function according to claim 1,5 or 6, is characterized in that: described LOAD CELLS is resistance strain weighing transducer.
8. according to the high temperature fluid density measurement device of the band heating function in claim 1-6 described in any one, it is characterized in that: described bracing or strutting arrangement comprises base, vertical expansion link, horizontal support platform and platform balancing weight, the lower end of described expansion link is installed on described base, the upper end of described expansion link is connected with described support platform, the shell of described platform balancing weight and described weighing device to be placed in respectively in described support platform and to lay respectively at the both sides of described expansion link, and described float connecting rod is through the platform through hole in described support platform.
9. the high temperature fluid density measurement device of band heating function according to claim 8, is characterized in that: described expansion link is by mutual sheathing and consist of the upper boom of Bolt to position and lower beam.
10. the high temperature fluid density measurement device of band heating function according to claim 8, is characterized in that: described base is provided with the adjusting screw(rod) for adjusting base balance.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108007820A (en) * | 2017-12-29 | 2018-05-08 | 安徽佩吉智能科技有限公司 | The robot system and its detection method of a kind of detection density |
| CN109283093A (en) * | 2018-10-31 | 2019-01-29 | 四川泛华航空仪表电器有限公司 | A kind of density sensor high temperature performance testing equipment |
| CN109283092A (en) * | 2018-10-31 | 2019-01-29 | 四川泛华航空仪表电器有限公司 | A kind of density sensor high/low temperature experimental method |
| CN111220495A (en) * | 2018-11-26 | 2020-06-02 | 广州市同声电子科技有限公司 | Automatic measuring recorder for urine specific gravity and its measuring method |
| CN111638567A (en) * | 2020-06-04 | 2020-09-08 | 水利部南京水利水文自动化研究所 | Support single-point and multi-point induction's multilayer timing weighing type sleet gauge |
| CN111678839A (en) * | 2020-06-10 | 2020-09-18 | 上海市计量测试技术研究院 | Device and method for calibrating density standard liquid by magnetic suspension method |
| CN112146729A (en) * | 2019-06-28 | 2020-12-29 | 北京铂阳顶荣光伏科技有限公司 | Device and method for detecting residual amount of raw materials in crucible |
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| CN111220495A (en) * | 2018-11-26 | 2020-06-02 | 广州市同声电子科技有限公司 | Automatic measuring recorder for urine specific gravity and its measuring method |
| CN112146729A (en) * | 2019-06-28 | 2020-12-29 | 北京铂阳顶荣光伏科技有限公司 | Device and method for detecting residual amount of raw materials in crucible |
| CN111638567A (en) * | 2020-06-04 | 2020-09-08 | 水利部南京水利水文自动化研究所 | Support single-point and multi-point induction's multilayer timing weighing type sleet gauge |
| CN111678839A (en) * | 2020-06-10 | 2020-09-18 | 上海市计量测试技术研究院 | Device and method for calibrating density standard liquid by magnetic suspension method |
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Application publication date: 20150513 |
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