CN101788347B - Quasi-adiabatic sealing type argon three-phase-point recurrence device - Google Patents
Quasi-adiabatic sealing type argon three-phase-point recurrence device Download PDFInfo
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- CN101788347B CN101788347B CN 201010100245 CN201010100245A CN101788347B CN 101788347 B CN101788347 B CN 101788347B CN 201010100245 CN201010100245 CN 201010100245 CN 201010100245 A CN201010100245 A CN 201010100245A CN 101788347 B CN101788347 B CN 101788347B
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Abstract
The invention relates to a quasi-adiabatic sealing type argon three-phase-point recurrence device, comprising an outer barrel body and an upper cover, and a three-phase-point vessel connected with the upper cover; a vacuum chamber is arranged in the vacuum chamber, the three-phase-point vessel is arranged at the center of the vacuum chamber, a first heating membrane is attached on the outer side surface of the upper part of the three-phase-point vessel, a radiation barrier is arranged between the vacuum chamber and the three-phase-point vessel, a second heating membrane is attached on the outer side surface and the bottom surface of the radiation barrier, a temperature equilibrium block is arranged at the lower part of the three-phase-point vessel, a plurality of jack channels for a pole platinum resistance thermometer well are arranged in the temperature equilibrium block, and jack channels for a sleeve pipe platinum resistance thermometer well are arranged at the center of the temperature equilibrium block; by adopting the structure, the argon three-phase-point recurrence device improves the recurrence accuracy in the experiments and application, the plateau warming duration is long, the detection efficiency is improved and the transmission of temperature criterion is ensured.
Description
Technical field
The present invention relates to a kind of packoff, more specifically, relate to a kind of quasi-adiabatic sealing type argon three-phase-point recurrence device, it can be used for setting up in 90 international temperature scales-189 ℃ to 0 ℃ temperature range benchmark and standard set-up, with calibrating calibration standard platinum resistance thermometer.
Background technology
The ITS-90 international temperature scale is defining fixed point with a series of metals, nonmetallic substance.The temperature value of these point of fixity is given by the temperature that balances each other of high purity material under certain pressure.The ITS-90 international temperature scale is at 13.8033-273.16K temperature range totally 6 point of fixity, and wherein 83.8058K relates to argon triple point (83.8058K), mercury triple point (234.3156K) and water triple point (273.16K) totally 3 defining fixed points to the 273.16K temperature range.90 temperature scales regulation has two kinds of interpolation instruments in the aforementioned temperature scope, be respectively sleeve pipe platinum-resistance thermometer (CSPRT) and long-rod platinum resistance thermometer (LSPRT), and two kinds of overlapping interpolation equations are arranged, wherein, argon triple point (83.8058K) is the very important defining fixed point of low-temperature space in the ITS-90 temperature scale.Although the sleeve pipe platinum-resistance thermometer mainly uses below 80K, require still needs to demarcate at argon triple point, mercury triple point or water triple point according to ITS-90, and the bushing temperature meter is relative with the water triple point reproduction inconvenient at the mercury triple point.The long-rod platinum resistance thermometer mainly uses in the aforementioned temperature scope, and the bushing temperature meter is more extensive relatively in actual applications.The argon triple point is the significant point of fixity that long-rod platinum resistance thermometer and bushing temperature meter are demarcated.It all is gaseous state under the argon gas normal temperature, be different from the metal point of fixity, material becomes liquid state by gaseous state or very large variation takes place solid-state volume, the difficult point that the gas point of fixity is made is to require to have in phase transformation the pure material of q.s, guarantees that Wen Ping has long enough time and the complete submergence of thermometer sensing element.
The argon triple point device of reproduction long-rod platinum resistance thermometer mainly is divided into two classes according to the difference of reproduction principle: a class is according to the design of constant heat flux method, realizes the reproduction of argon triple point Wen Ping by regulating pressure; Another kind of is according to the design of quasi-adiabatic method, relies on high accuracy temperature control and the little heating of pulse to realize the reproduction of argon triple point Wen Ping.In the device according to constant heat flux method design, generally to adopt manual mode to regulate pressure and realize Wen Ping, experiment is subjected to atmospheric the influence, and efficient is lower and temperature-controlled precision is not high in the experimentation; And along with the carrying out of experiment, the liquid nitrogen surface in the device can reduce and then cause the inner temperature of argon triple point device field to change, and the change of this temperature field will directly influence the accuracy of triple point device reproduction.Comparatively speaking, adopt the argon triple point device of quasi-adiabatic principle reproduction to overcome to measure the factor that influenced by atmospheric pressure, can add liquid nitrogen at any time, weaken liquid nitrogen and reduce the influence that brings, utilize the temperature controller accurate temperature controlling, the little current flow heats of pulse realizes the reproduction of warm level ground, and the time of energy significant prolongation Wen Ping, widely adopted owing to its remarkable advantages.
Although the triple point device with respect to the constant heat flux method, adopt the sealing type argon triple point device of quasi-adiabatic principle reproduction to have tangible advantage, but its reproduction stability still is subjected to the influence of all many-sided factors, as: the purity of source of the gas, the impermeability of device, concrete architectural feature, the preservation of point of fixity, concrete method for heating and controlling etc.Existing argon triple point device can't satisfy the demand for development of temperature being carried out high-acruracy survey, and preservation, maintenance and the transmission of thermometer benchmark produced serious influence.Therefore, how further improving argon triple point device in experiment and the accuracy of reproduction in using, ensure the transmission of temperature reference, is the key issue place of the solution of needing badly at present.
Summary of the invention
The invention provides a kind of quasi-adiabatic sealing type argon triple point device with high repdocutbility, it includes outer cylinder body and loam cake, the triple point container that is connected with loam cake; In described reproducing apparatus, be provided with vacuum chamber, described triple point container is positioned at the center of vacuum chamber, lateral surface on described triple point container top posts first heating film, between described vacuum chamber and described triple point container, be provided with radiation shield, second heating film is posted in lateral surface and bottom surface at described radiation shield, bottom at described triple point container is provided with block, in described block, be provided with a plurality of socket passages for long-rod platinum resistance thermometer trap, have the socket passage for sleeve pipe platinum-resistance thermometer trap at the center of described block.
The upper and lower of preferred argon triple point container is cylindrical, be taper surface at the middle part of argon triple point container, the angle of this taper surface is between 45 to 90 degree, the resistance of described first heating film is 152 ohm, at thermometer trap tip designs closed chamber, make thermometer trap mouth and air isolated, described closed chamber has the hole of vacuumizing and air-filled pore, between loam cake and vacuum chamber, protective shield of radiation is set, in described closed chamber, adopt thermometer trap sealing socket that the thermometer trap is sealed, prevent that water vapor from freezing in the thermometer trap; Described block adopts the bigger material of coefficient of heat conductivity to make, lateral wall at described block forms uniform gear-like groove, and leave four grooves from top to bottom symmetrically at the lateral wall of column block, offer groove on the surface of the socket passage of described sleeve pipe platinum-resistance thermometer trap;
Preferred described block adopts the red copper of purity more than 99.9% to make, the resistance of described second heating film is 75 ohm, the top external diameter scope 120-140mm of described argon triple point container, lower outer diameter scope 104-124mm, it highly is the right cylinder of 240-270mm, the sidewall thickness scope is 5-7mm, on the scope of going to the bottom be 10-12mm, container adopts stainless steel bars to empty and makes, pressure-bearing is more than 120Mpa, last lower bottom cover is connected on the container by argon arc welding, and the height of described block is 80mm, and diameter range is 80-100mm; Described radiation shield adopts the red copper more than 99.9% to make.
Description of drawings
Fig. 1 is the structural representation of sealing type argon triple point device.
Fig. 2 is the syndeton sectional view of argon triple point container and loam cake.
Fig. 3 A is the plan structure figure of block.
Fig. 3 B is the AA1 directional profile figure of block
Embodiment:
Advantage of the present invention will by hereinafter by reference to the accompanying drawings in to the detailed description of embodiment and more obvious.
Fig. 1 is the structural representation of sealing type argon triple point device, this argon triple point device comprises outer cylinder body 1 and loam cake 2, described outer cylinder body 1 and loam cake 2 by stainless steel or other can anticorrosion, the material of compression resistance forms, can directly contact between outer cylinder body 1 and the loam cake 2, also can between outer cylinder body 1 and loam cake 2, rubber washer or metal washer be set, pass through bolt then, make between outer cylinder body 1 and the loam cake 2 closely to contact, perhaps can adopt the mode of welding that outer cylinder body and loam cake are welded together.Wherein, have a plurality of opening portions at loam cake 2, these opening portions are respectively applied to arrange liquid nitrogen and pour into mouth, vacuum orifice, thermometer trap gateway etc.In addition, loam cake 2 can be set to form of flanges, and irritating in from the opening 4 of loam cake 2 toward the cavity of outer cylinder body 1 has liquid nitrogen, is used for argon gas is cooled off, and preferred described outer cylinder body is Dewar flask.
Fig. 2 is the syndeton sectional view of argon triple point container and loam cake, as shown in Figure 2, argon triple point container is suspended on the loam cake 2, and vacuum chamber 7 provides vacuum environment for argon triple point container, vacuum chamber 7 has cavity and gland bonnet, has the opening portion corresponding with loam cake 2 at gland bonnet.Because under low-temperature condition, the leakage heat of triple point system is mainly heat conduction and convection current dual mode, adopt the combined system of mechanical pump and molecular pump that vacuum chamber 7 is carried out extracting vacuum, the combinations thereof system vacuumizes by the 3 pairs of vacuum chambers 7 of passage that are formed between loam cake 2 and the gland bonnet, and its vacuum tightness can reach 5.0x10
-5Pa, thus the convection current that can reduce to the full extent in the triple point system influences.The sidewall of vacuum chamber 7 all adopts argon arc welding to be connected with the bottom, and gland bonnet can be made into form of flanges, can utilize the sealing of indium silk between vacuum chamber and the gland bonnet.
Argon triple point container 9 is positioned over the center of vacuum chamber 7, pours into hole 12 by the argon gas in argon triple point container 9 bottoms high-purity argon gas is charged into wherein.Between argon triple point container 9 and vacuum chamber 7, be provided with radiation shield 8, radiation shield 8 is at argon triple point outside of containers, by the outside surface at radiation shield 8 heating element is set, radiation shield is carried out controllable intensification, stop the outside radiations heat energy of argon triple point container, for argon three-phase-point recurrence provides the samming environment.Adopt the sealing argon triple point device of quasi-adiabatic method reproduction, its concrete reproducing method is: be reduced to below the triple point by the temperature of the liquid nitrogen in the outer cylinder body 1 with the argon gas in the argon triple point container, wait for that the sufficiently long time guarantees that the argon gas in the container solidifies fully; Use vacuum system with vacuum pumping in the vacuum chamber 7 then, after vacuum tightness reaches preassigned, current source heats up to argon triple point container, it heats up simultaneously to utilize temperature controller control radiation shield temperature following, at first adopt big pulse current that container is heated, along with the increase of pulse number, the orderly microlitre of the temperature of container, the current value of pulse reduces gradually, and becomes the interval time between the pulse big.In the prior art, heating, the used resistance of temperature control are manganese-copper filament, manganese-copper filament is wrapped in the middle part of argon triple point container and radiation shield, and when heating, circuit transmits a heating signal, manganese-copper filament begins heating, yet because the volume that heater strip occupies is less, transmitting evenly needs long time, when temperature reaches design temperature, central temperature can be higher than the edge temperature, causes temperature control unstable.And owing to manganese-copper filament, container, radiation shield all are metals, so there is the possibility that is communicated with conduction.Be head it off, on the lateral surface of outside of containers and radiation shield and bottom surface, all post heating film and replace manganese-copper filament that it can guarantee even heating, avoids local overheating to cause the failure of an experiment.Argon triple point device of the present invention is the temperature control that reaches more stable, and two-layer protective shield of radiation can also be set, and wherein selects one to carry out temperature control arbitrarily, and perhaps the two carries out temperature control simultaneously.The Position Design of the close gland bonnet of vacuum chamber have two heat sink, at the heat sink lead that twines, make lead form a samming environment herein, reduce system's leaking heat.
For argon triple point container 9, its architectural feature need be considered from two aspects the influence of repdocutbility: the one, the volume of integral container, the 2nd, argon gas solidify the back can account for volume.Argon gas is become in the liquid process by gaseous state under normal pressure, nearly 1000 times of volume-diminished, argon triple point volume of a container is more big in theory, the inner argon gas amount that can hold is more many, the reproduction effect of temperature is more good, yet in actual applications, the size of argon triple point container is subjected to the restriction of a lot of actual conditions, and container volume is more big, needs the consumption of liquid nitrogen amount also just more big, the size of Dewar flask will correspondingly increase simultaneously, processing cost is too high, and will spend more time in experiment and testing process, therefore will take all factors into consideration the influence of many-sided factor, select the proper container volume, make suitable experiment and the required argon triple point container of commercial Application.When argon triple point container was straight barrel shape, after temperature was reduced to below the argon liquefaction point in container, argon gas may be in each position of argon triple point container liquefaction, finally causes argon gas not liquefy fully or be solidificated in the fixed position.Based on above-mentioned consideration, argon triple point container 9 of the present invention adopts stainless steel to make, the upper and lower of argon triple point container is cylindrical, be taper surface at the middle part of argon triple point container, the angle of this taper surface is that the argon that is beneficial to liquefy flows into the cavity bottom smoothly, condenses at the triple point chamber wall to prevent argon gas between 45 to 90 degree, and when the angle too small of taper surface, can cause a part of argon to be solidificated on the taper surface.The inwall of argon on triple point container top condenses in order further to disappear, lateral surface on the top of described argon triple point container posts first heating film, heating by first heating film makes argon flow into the bottom of container smoothly, and preferably the resistance of this first heating film is 152 ohm.The liquid level of liquid argon is positioned at the lower end of argon triple point container taper surface substantially, and solid argon forms the shape that is similar to light wall pipe in the bottom of argon triple point container, surrounds thermometer, and having guaranteed has good thermo-contact between argon and thermometer.Argon triple point container bottom need be placed the bigger material of coefficient of heat conductivity, to guarantee the homogeneity of the temperature in the argon triple point container.Material of the present invention preferably adopts the red copper piece, and the red copper coefficient of heat conductivity is bigger during low temperature, can play the effect of samming.In the argon gas temperature-fall period, more argon gas is liquefied, is solidificated on the red copper piece as far as possible, like this when temperature reaches the argon triple point, argon absorbs heat and undergoes phase transition, but temperature-resistantization, thermometer trap bottom is placed among the red copper block, guarantees that all thermometers have uniform temp, are conducive to actual measurement.Preferred argon triple point container dimensional of the present invention is designed to top external diameter scope 120-140mm, lower outer diameter scope 104-124mm, it highly is the right cylinder of 240-270mm, the sidewall thickness scope is 5-7mm, on the scope of going to the bottom be 10-12mm, container adopts stainless steel bars to empty and makes, and pressure-bearing is more than 120Mpa, and last lower bottom cover is connected on the container by argon arc welding.
Fig. 3 A is the plan structure synoptic diagram of block 10, and Fig. 3 B is that block is along the sectional view of the AA1 line among Fig. 3 A.Platinum-resistance thermometer temperature-sensing element length generally about 60mm, in order to guarantee the submergence of thermometer, must be kept certain liquid height in the triple point container.The size of red copper piece and pattern design have very big influence to the reproduction of argon point.According to the internal diameter size of argon triple point container, consider the stability of red copper piece in container simultaneously, select the size of suitable red copper block, the maximum outside diameter of block will be in container, and its undersized is in inside diameter of vessel.The pattern of red copper block is determining the adhesion amount of argon solid, and for more argon gas is solidificated on the block, the outside pattern of block should be designed to roughness.The diameter range of red copper block is 80-100mm.The temperature zone of long-rod platinum resistance thermometer is at the thermometer low side and have about 60mm, and the height of block is established and it can be covered fully, and the whole height of block is designed to 80mm.Block is designed to gear-like, can guarantee the adhesion amount of argon solid like this, simultaneously for guaranteeing that thereby argon gas can more flow to the block bottom and make the argon solid be attached on the block from top to bottom when liquefying, lateral wall at block forms uniform gear-like groove 14, for guaranteeing the adhesion effect of argon on lateral wall, leave four grooves 13 from top to bottom symmetrically at the lateral wall of column block as shown in Figure 3A in addition.Have bushing temperature meter trap at the center of red copper block, bushing temperature meter base is placed wherein.Argon triple point device can reappear the bushing temperature meter in reproduction long-rod platinum resistance thermometer.
The closed type triple point device of high repdocutbility is mainly used in reappearing the long-rod platinum resistance thermometer, can reappear the bushing temperature meter simultaneously, and the bushing temperature meter is shorter and smaller, can directly be placed in the argon triple point container.Container is suspended in the Dewar flask, operation circuit connects by thinner enameled wire, leaking heat is very little, and the bar of long-rod platinum resistance thermometer is long fixing, and thermometer connects on the top and goes out it to be put into fully the leakage heat affecting that needs to consider the thermometer bar in the argon triple point container.
According to current domestic demand and national reference temperature count number, can design a plurality of thermometer traps that satisfy research and commercial Application demand, as two thermometer traps or four thermometer traps can be set, have two thermometer traps at AA1 as shown in Figure 3A, also can be again on the direction vertical with the AA1 line symmetry two thermometer traps are set.Thermometer trap length is decided by the length of long-rod platinum resistance thermometer, and the LSPRT length of using in low-temperature zone at present is mostly between 450-460mm in the world, so thermometer trap height is designed to 450mm.Distance between the thermometer trap will decide according to the diameter of the thermometer handle of current use, and considers convenient plug.Leak heat in order to reduce as far as possible, the thermometer trap is selected the thin-wall stainless steel of 1mm.Thermometer trap mouth is directly exposed in the air, and airborne steam condenses at thermometer trap mouth during the liquid nitrogen cooling process, and thermometer trap internal steam condenses on the thermometer simultaneously, may damage thermometer, and finishes the back thermometer in experiment and can't extract.For solving ice formation issues, thermometer trap mouth must be isolated with air, and at thermometer trap tip designs closed chamber, described closed chamber can vacuumize and inflate simultaneously, and effectively prevents leak-stopping heat.During the reproduction experiment, thermometer is sealed in the inside, sealing chamber fully, and the air in the thermometer trap is extracted out, charges into helium or other blanket gas and guarantees good heat exchange.Consider when measuring the long-rod platinum resistance thermometer, to wish also can measure the sleeve pipe platinum-resistance thermometer during container design, this triple point container has designed sleeve pipe platinum-resistance thermometer trap 11, be processed with groove on the surface of the socket passage of described sleeve pipe platinum-resistance thermometer trap, the having of groove helps to guarantee the reproduction effect when liquid is less.
It is by current source first heating film that is positioned at triple point container outer surface of upper to be heated that device is heated up, and the temperature of the temperature controller control radiation shield outside second heating film keeps triple point container and radiation shield to heat up jointly.Current source output Weak current heats it, owing to need the regular hour that temperature is passed to the inboard of container by the outside after the heating, so require heating power supply to need to wait for a period of time, carries out the heating second time again after heating once.Use the liquid nitrogen frozen argon gas, the boiling temperature of liquid nitrogen is 77K, the temperature of the triple point of argon gas is 83.8058K, the temperature of the two is very approaching, thus to use weak current to heat, if electric current is overheated, can cause temperature to rise on the argon triple point, require during experiment used heating current be the mA level other, and must can provide pulse current, preferably adopt the precision constant current source 6220 of Keithley.
Control system is the core of experimental provision, and the reproduction of argon triple point device requires accurate temperature controlling.By the accurate control of temperature controller realization to heating power supply, when temperature reaches argon triple point temperature, need carry out accurate temperature controlling to it, only form the accuracy that a stable samming field could guarantee reproduction at argon triple point outside of containers.Preferred lakershore 340 temperature controllers that adopt.
As the preferred embodiments of the present invention, in the argon triple point packoff: block 10, piece adopts the red copper more than 99.9% to make, it highly is 80mm, the diameter of block is 80-100mm, this block integral body has several layers of gear-like projection, and form the groove from top to bottom of symmetry at the lateral wall of block, above-mentioned projection or groove help more high-purity argon gas to be solidificated on each position of soaking piece, guarantee the homogeneity of whole block temperature, have a sleeve pipe platinum-resistance thermometer trap socket passage in the block, the block top has two long-rod platinum resistance trap socket pipelines, and height is 78mm.Sleeve pipe platinum-resistance thermometer trap and long-rod platinum resistance thermometer trap are individually fixed in the relevant position of block.
Argon triple point container 9, argon triple point container dimensional is designed to top external diameter scope 120-140mm, lower outer diameter scope 104-124mm, it highly is the right cylinder of 240-270mm, the sidewall thickness scope is 5-7mm, and base thickness degree scope is 10-12mm up and down, and container adopts stainless steel bars to empty and makes, pressure-bearing is more than 120Mpa, and last lower bottom cover is connected on the container by argon arc welding.Block 10 is placed on argon triple point container 9 bottoms, and argon triple point container up and down two ends has the circular hole that the thermometer trap passes, and thermometer trap and argon triple point container are through the argon arc welding assurance sealing that is formed by connecting.Ultrapure argon gas pours into hole 12 by argon gas and goes in the argon triple point container 9.
Radiation shield 8, radiation shield 8 adopts the red copper more than 99.9% to make, and is installed in the outside of argon triple point container, in samming field of the peripheral formation of argon triple point container.
Vacuum chamber 7, vacuum chamber 7 uses corrosion resistant plate to be welded through argon arc welding, and vacuum chamber adopts the sealing of indium silk, and vacuum system is found time by 3 pairs of vacuum chambers 7 of vacuum orifice, and the vacuum tightness of vacuum chamber 7 can reach 5.0x10
-5Handkerchief.
Thermometer trap sealing socket 5, thermometer trap sealing socket seals the thermometer trap, prevents that water vapor from freezing in the thermometer trap.
Before all parts of packoff are installed, all to clean, dry through strict.Adopt ultrasound wave to clean the method that combines with the special-purpose metal cleaning fluid earlier.Ultrasound wave is used deionized water rinsing after cleaning for several times, when the check of PH test paper is neutrality, finishes cleaning and prepares degasification.Degasification mainly by baking, find time and method of replacement realizes.Concrete steps are as follows: the heating tape is entangled in the outside, surge flask and the part pipeline outer wall of radiation shield, and this heating tape can be used about 700K, is enough to guarantee that the foreign gas of adhering to discharges.Be connected with vacuum system then, toast, charge into high-purity argon gas repeatedly and replace and vacuumize.Processing through two first quarter moons makes foreign gas fully discharge, and makes the inwall of argon triple point container form argon environment.
Repdocutbility is the important symbol of temperature scale point of fixity level.Mounted packoff charges into ultrapure argon gas and reappears, utilize liquid nitrogen that the temperature of argon gas is reduced under its triple point, wait for that the sufficiently long time guarantees that argon gas solidifies fully, utilize vacuum system with the vacuum chamber vacuum pumping, inner argon triple point container utilizes pulse current source to heat, temperature controller control radiation shield is followed its temperature and is risen, and the heating rate of its heating rate and argon triple point container is consistent.When temperature reaches argon triple point temperature, the temperature of temperature controller is set in is higher than about argon triple point temperature level ground 100mk, carry out temperature control, current source carries out the short time heating and waits as long for, and utilizes platinum-resistance thermometer that the argon triple point is measured then.
Packoff is reappeared, and the warm level ground duration was above 23 hours.Through uncertainty evaluation, this point of fixity container expanded uncertainty is less than 1mK (k=2).This shows that the reproduction level of packoff is very high.The structural design of invention is easy to use, and the warm level ground time is long, has improved calibrating efficient.
Although illustrate and described the present invention with reference to specific preferred embodiment, but those skilled in the art should understand that, the specific embodiments of enumerating in this instructions or embodiment, only in order to understand technology contents of the present invention, in the case of without departing from the spirit and scope of the present invention, the present invention can carry out multiple change in the form and details.
Claims (7)
1. quasi-adiabatic sealing type argon three-phase-point recurrence device, it includes outer cylinder body and loam cake, the argon triple point container that is connected with loam cake, be provided with vacuum chamber in the described reproducing apparatus, described argon triple point container is positioned at the center of vacuum chamber, the upper and lower of described argon triple point container is cylindrical, lateral surface on described argon triple point container top posts first heating film, between described vacuum chamber and described argon triple point container, be provided with radiation shield, second heating film is posted in lateral surface and bottom surface at described radiation shield, bottom at described argon triple point container is provided with block, described block adopts the bigger material of coefficient of heat conductivity to make, in described block, be provided with a plurality of socket passages for long-rod platinum resistance thermometer trap, have the socket passage for sleeve pipe platinum-resistance thermometer trap at the center of described block; Described vacuum chamber has cavity and gland bonnet, be provided with in the position of the close gland bonnet of vacuum chamber two heat sink, at the heat sink lead that twines, it is characterized in that: adopt current source that described first heating film is heated, the temperature of the temperature controller control radiation shield outside second heating film keeps argon triple point container and radiation shield to heat up jointly.
2. device as claimed in claim 1, it is characterized in that: the middle part of argon triple point container is taper surface, the angle of this taper surface is between 45 to 90 degree.
3. as each described device among the claim 1-2, it is characterized in that: the lateral wall at described block forms uniform gear-like groove, and leaves four grooves from top to bottom symmetrically at the lateral wall of column block.
4. device as claimed in claim 3 is characterized in that: described block adopts the red copper of purity more than 99.9% to make.
5. device as claimed in claim 4 is characterized in that: the surface at the socket passage of described sleeve pipe platinum-resistance thermometer trap offers groove.
6. device as claimed in claim 5, it is characterized in that: the resistance of described first heating film is 152 ohm, the resistance of described second heating film is 75 ohm.
7. device as claimed in claim 6, it is characterized in that: the height of described block is 80mm, and diameter range is 80-100mm, and described radiation shield adopts the red copper more than 99.9% to make.
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| CN102175335B (en) * | 2011-02-10 | 2012-12-19 | 中国工程物理研究院化工材料研究所 | Method, system and pressure-bearing device for measuring internal temperature field and pressure field of materials |
| CN102279065B (en) * | 2011-03-03 | 2012-12-05 | 中国计量科学研究院 | Automatic recurring device for gallium fixed points |
| CN102539019B (en) * | 2012-01-05 | 2013-09-25 | 北京东方计量测试研究所 | Temperature measurement and calibration platform in space vacuum environment |
| CN106226345B (en) * | 2016-06-21 | 2020-04-10 | 中国计量科学研究院 | Quasi-adiabatic minitype gallium phase change fixed point device and measuring method |
| CN108168738B (en) * | 2017-12-18 | 2023-06-02 | 合肥中科离子医学技术装备有限公司 | Device and method for measuring heat leakage quantity of superconducting magnet low-temperature system |
| CN109932081B (en) * | 2019-03-27 | 2020-12-08 | 德州尧鼎光电科技有限公司 | Preparation method of water triple point micro calibration source chip |
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