CN206450343U - A kind of international temperature comparison device using refrigeration machine as low-temperature receiver - Google Patents
A kind of international temperature comparison device using refrigeration machine as low-temperature receiver Download PDFInfo
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- CN206450343U CN206450343U CN201720100049.3U CN201720100049U CN206450343U CN 206450343 U CN206450343 U CN 206450343U CN 201720100049 U CN201720100049 U CN 201720100049U CN 206450343 U CN206450343 U CN 206450343U
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Abstract
The utility model discloses a kind of international temperature comparison device using refrigeration machine as low-temperature receiver, it includes：Refrigeration machine, it includes at least one cold head；Pressure chamber, the refrigeration machine freezes to the pressure chamber；Microwave cavity is provided with the pressure chamber, fixing point part is provided with microwave cavity.Device working environment uniformity of the present utility model very well, is examined and compares thermometric degree of accuracy height；Temperature reference device couples fixing point part, and temperature indexing and temperature international comparison function can be realized simultaneously；Device builds, saving experimental period, efficiency high relatively low with measurement expense.
Description
Technical field
The utility model is related to a kind of comparison device, is compared more particularly, to a kind of international temperature using refrigeration machine as low-temperature receiver
Device.
Background technology
At present, the calibrating of low-temperature space microthermometer or indexing measurement typically use comparison method.According to the zeroth law of thermodynamics,
If two heating power systems are in thermal balance with the 3rd heating power system respectively, the two heating power systems are also at heat to each other
Balance, two systems have identical temperature.Standard thermometer and tested thermometer are put into same homogeneous temperature field simultaneously,
Make standard thermometer and tested thermometer while setting up thermal balance between homogeneous temperature field respectively, pass through tested thermometer and mark
The temperature resistance characteristic Relationship Comparison of quasi- thermometer, can be achieved the calibrating or indexing to being detected thermometer.
Fixing point is the reproducible equilibrium temperature point between Cucumber difference phase as defined in international temperature scale, is mainly used in
Reappear international temperature scale, index the high accuracy thermometers such as standard platinum resistance thermometer, determined with temperature value, repdocutbility is good, standard
The characteristics of really property is high, is the important component of temperature scale.Under normal circumstances, test stone temperature is carried out first with fixing point device
Meter, the old iron thermometer of such as standard obtains temperature-resistance characteristic of the standard thermometer at a temperature of fixing point；Then by standard temperature
Degree meter is put into as Continuous pressure-controlled air inflation refractive index or dielectric constant equitemperature comparison device are compared.So it is accomplished by two sets of differences
Experimental provision, experimental provision cost is high, and time-consuming for experiment, less efficient；Further, since the experimental situation of two covering devices is
Difference, can introduce certain error in comparison process, and experimental provision has certain temperature measurement uncertainty in itself in addition, causes
Overall temperature measurement uncertainty is larger.Therefore, it is necessary to develop, a kind of temperature measurement uncertainty is small, expense is low, time-consuming short, efficiency high
International temperature comparison device.
Utility model content
This patent aims to solve the problem that conventional temperature international comparison device temperature measurement accuracy is relatively low, builds high with cost of use, takes
The long and low problem of efficiency.
The utility model discloses a kind of international temperature comparison device using refrigeration machine as low-temperature receiver, it includes：Refrigeration machine, its
Including at least one cold head；Pressure chamber, the refrigeration machine freezes to the pressure chamber；It is provided with the pressure chamber micro-
Wave resonance chamber, is provided with fixing point part in microwave cavity.
Wherein, standard temperature element and tested temperature element are installed on the fixing point part.
Wherein, the refrigeration machine includes one-level cold head and two grades of cold heads.
Wherein, pressure chamber flange is provided with the pressure chamber.
Wherein, connectivity structure and microwave antenna are disposed with the microwave cavity.
Wherein, in addition to multiple flexible attachment components.
The utility model provides a kind of international temperature comparison device using refrigeration machine as low-temperature receiver, passes through Continuous pressure-controlled air inflation refractive index
Method sets up standard apparatus and couples fixing point part, can improve temperature measurement accuracy, while realizing that temperature indexing and temperature compare work(
Can, the multiple functions of device, it is possible to decrease device is built and cost of use save the time, improve efficiency.
Brief description of the drawings
Fig. 1 is the international temperature comparison device schematic diagram of the present utility model using refrigeration machine as low-temperature receiver.
Embodiment
For the ease of understanding the utility model, embodiment of the present utility model is illustrated below in conjunction with the accompanying drawings, ability
Field technique personnel should be appreciated that following explanations only to facilitate being explained to utility model, and not as to its scope
Specific restriction.
Fig. 1 is the structural representation of the international temperature comparison device of the present utility model using refrigeration machine as low-temperature receiver.Such as Fig. 1 institutes
Show, the international temperature comparison device of the present utility model using refrigeration machine as low-temperature receiver includes：Refrigeration machine 1, the refrigeration machine 1 shakes to be low
Dynamic pulse tube refrigerating machine, including one-level cold head 8 and two grades of cold heads 17, wherein one-level cold head 8 are connected with one-level flange 12, one-level
Cold head 8 times is equipped with one-level flexibility thermally coupled 9；Two grades of cold heads 18 are connected with two grades of flanges 21, and two grades of cold heads 18 times are soft equipped with two grades
Property thermally coupled 19；Vascular system is efficiently solved by spring damper 2, one-level flexibility thermally coupled 9 and two grades of flexibilities thermally coupled 19
The mechanical oscillation that produce and reduce gases cycle pressure oscillation in vascular when cold works and cause tube wall elasticity deformation band
Vibration effect, be that the inside of microwave cavity 31 and fixing point part 32 build a good temperature and compare environment.
Be connected with zero level flange 3 in the lower section of the spring damper 2, the one-level flange 12 and zero level flange 3 it
Between be provided with zero level suspension rod 5, one-level suspension rod 14 is set between two grades of flanges 21 and one-level flange 12, passes through the zero level
Flange is connected by suspension rod 5 with one-level suspension rod 14, and the simple in construction of two layers suspension rod, installing/dismounting are very convenient, and suspension rod is by exhausted
Hot material is made, while the heat transfer between flange not at the same level can also be reduced.In addition, the one-level flange 12, one-level protective shield of radiation
13rd, two grades of flanges 21 and two grades of protective shield of radiations 22 are gold-plated structure, can effectively reduce radiation heat transfer；For the temperature to flange
It is controlled, one-level flange thermometer 10 and one-level flange heater 11 is set on the one-level flange 12, pass through one-level method
The temperature of blue 10 pairs of the thermometer one-level flange is measured, and passes through 11 pairs of one-level flanges 12 of one-level flange heater
Temperature is finely adjusted；Two grades of flange thermometers 19 and two grades of flange heaters 20 are set on two grades of flanges 21, pass through two
The temperature of level flange 19 pairs of two grades of flanges 21 of thermometer is measured, and passes through two grades of 20 pairs of flange heaters, two grades of methods
The temperature of orchid 21 is finely adjusted.
Zero level flange 3 and double-layer vacuum cylinder 4, one-level flange 12 and one-level protective shield of radiation 13, two grades of flanges 21 are prevented with two grades
Radiation shield 22, pressure chamber flange 25 is with pressure chamber 26 preferably by bolt connection, all detachable；Zero level flange 3 and bilayer are true
Empty cylinder 4 is connected with one-level flange 12 and one-level protective shield of radiation 13 builds a confined space, two grades of flanges 21 and two grades jointly
Protective shield of radiation 22 builds a confined space jointly, and the vacuum system constituted together is that pressure chamber 26 and microwave cavity 31 are carried
For stable vacuum insulation environment, it is ensured that with the uniformity of the thermal field of fixing point part 32 in microwave cavity 31.By using
Double-layer vacuum structure reduces the weight of double-layer vacuum cylinder 4, double-layer vacuum cylinder 4, one-level protective shield of radiation 13 and two grades of protective shield of radiations
22 are respectively provided with domed bottom structure, in addition, domed bottom structure further reduces double-layer vacuum cylinder 4, one-level radiation proof
The weight of screen 13 and two grades of protective shield of radiations 22, reduces danger when accident occurs, installation is avoided the occurrence of while also helping
Personnel are by the situation of corner angle scratch during dismounting.
In Fig. 1, pressure chamber 26 is provided with the lower section of two grades of flanges 21, the pressure chamber 26 is constituted with pressure chamber flange 25
Work test environment, has inlet port, the inlet port and air inlet pipe 33, escape pipe on the pressure chamber flange 25
34 are connected with vacuum feedthroughs interface 35.
The comparison device includes pressure control pipeline portions, the pressure control pipeline portions and the air inlet pipe 33 and escape pipe
34 are attached, and cause the gas pressure in whole standard apparatus to keep stable by the pressure control pipeline portions, the pressure control pipe
Road part includes the helium that storage in source of the gas 36, the source of the gas 36 has high-purity, and the source of the gas 36 connects cold-trap 37 by pipeline,
Valve is set around cold-trap 37, and whether optional gas is by cold-trap 37, and the cold-trap 37 is used to reduce helium temperature, in order to
The purity of helium is improved, gas purification apparatus 39 can be further provided with pipeline, in the surrounding tube of gas purification apparatus 39
Multiple valves are set in road, can remove the impurity in helium to improve helium purity by the gas purification apparatus 39 so that
Helium into air inlet pipe 33 has high purity.Pressure control pipeline portions are provided with first flowmeter 38 and second flowmeter
41, measure the mass flow of pipeline in real time by the two flowmeters；Wherein, the helium sent from source of the gas 36 passes through first flow
Meter 38, valve, gas purification apparatus 39 and air inlet pipe 33 enter pressure chamber 26 and microwave cavity 31, flow into and press through escape pipe 34
Power meter 42 and feedback control loop 43, when the flow of second flowmeter 41 is excessive, part helium can be retracted to the external world via vavuum pump 40
Environment, so each part constitutes a pressure compensation loop together, and to compensate, the leakage of the gap gas of pressure gauge 42 is caused to press
Power is lost, so that pressure gauge is chronically at stable state, it is that pressure chamber 26 and the inside of microwave cavity 31 provide long-term, steady
Fixed pressure environment.It can be said that pressure chamber 26, connectivity structure 27, microwave cavity 31, air inlet pipe 33, escape pipe 34, gas cylinder
36th, cold-trap 37, first flowmeter 38, gas purification apparatus 39, vavuum pump 40, second flowmeter 41, piston manometer 42 and anti-
It is fed back to road 43 and constitutes micrometeor compensation loop together so that pressure is equal everywhere in loop, effectively prevent dead space amendment, solves
Problem on deformation of the microwave cavity of having determined 31 under vacuum and inflated condition, reduces imperfection to temperature measurement accuracy
Influence；Micrometeor compensation loop reduces pressure measxurement and not known by the way that absolute pressure measures conversion is controlled for relative pressure
Degree.
In case study on implementation as shown in Figure 1, microwave cavity 31 is mounted below in pressure chamber flange 25, is disposed with thereon
Connectivity structure 27, microwave antenna 28, wherein：One of connectivity structure 27 is connected with air inlet pipe 33 by capillary so that pressure chamber
26th, microwave cavity 31, pressure control air inlet pipe 33, pressure is equal everywhere in escape pipe 34, effectively prevent in gas thermometer and deposit
Pressure measurement pipeline share dead space amendment caused by pressure, solve change of the microwave cavity 31 under vacuum and inflated condition
Shape problem, reduces influence of the imperfection to temperature measurement accuracy；Microwave cavity 31 can be successfully separated association pattern from
And frequency measurement accuracy is improved, launching microwave, measurement resonant frequency by microwave antenna 28 finally obtains microwave cavity 31 and exists
Resonant frequency under vacuum state and inflated condition, has higher precision, uncertainty reaches 2ppb, fixed than measurement absolute pressure
The resonant frequency of torispherical microwave cavity 31 meets certain relational expression with gas refracting index therein under the conditions of pressure, thus closes
Be that formula can obtain the gas refracting index under the conditions of level pressure, and by gas virial equation can obtain level pressure under the conditions of gas refracting index with
Another relational expression that thermodynamic temperature is met, so that can thus relational expression in the case of gas refracting index under the conditions of known level pressure
Obtain corresponding thermodynamic temperature under the conditions of level pressure.
Temperature is installed in one-level cold head 8, one-level flange 12, two grades of cold heads 18, two grades of flanges 21 and microwave cavities 31
Degree meter (6,10,15,19 and 29) and heater (7,11,16,20 and 30), pin interfaces 34 are connected with automatic control system, complete
Into the synchronous acquisition, record and automatic business processing of data, so as to realize the matching measurement of high accuracy thermodynamic temperature.
As shown in figure 1, being provided with fixing point part 32 in microwave cavity 31, mark is installed on fixing point part 32
Quasi- temperature element and tested temperature element.When fixing point part 32 reaches design temperature, the automation data being connected with fairlead
The tested temperature element of acquisition system collection, in the related data of design temperature point, handles the data collected with standard temperature element
Afterwards, the corresponding relation of tested thermometric component temperature and resistance is obtained, the indexing function to being detected temperature element can be achieved；At some
Fixing point temperature, such as neon three phase point, hydrogen three phase point equitemperature, standard are detected the measured value and other international comparisons of temperature element
The same standard obtained in device is detected thermometric element measurement value and contrasted, and international temperature comparison function can be achieved.In this reality
Apply in case, by the way that fixing point part 32 is coupled in standard apparatus in microwave cavity 31, it is ensured that both have homogeneous
Experimental temperature environment, reduces uncertain source when comparing thermometric, improves the thermometric degree of accuracy；Because fixing point has temperature
The characteristics of value is determined, repdocutbility is good, accuracy is high, if carrying out temperature control using fixing point, can further improve the equal of thermal field
One property, so as to realize more accurately temperature international comparison verification.In addition, same device possesses multiple functions, you can reduction dress
Put and build and cost of use, experimental period can be saved again, service efficiency is improved.
Device working environment uniformity of the present utility model very well, is examined and compares thermometric degree of accuracy height；Temperature reference device
Fixing point part is coupled, temperature indexing and temperature international comparison function can be realized simultaneously；Device is built with measurement expense relatively
It is low, save experimental period, efficiency high.
Although it is understood that the utility model is disclosed as above with preferred embodiment, but above-described embodiment is not
To limit the utility model.For any those skilled in the art, the utility model technical side is not being departed from
Under case ambit, technical solutions of the utility model all are made with many possible variations using the technology contents of the disclosure above
And modification, or it is revised as the equivalent embodiment of equivalent variations.Therefore, every content without departing from technical solutions of the utility model,
According to technical spirit of the present utility model to any simple modifications, equivalents, and modifications made for any of the above embodiments, still belong to
In the range of technical solutions of the utility model protection.
Claims (6)
1. a kind of international temperature comparison device using refrigeration machine as low-temperature receiver, it includes：Refrigeration machine, it includes at least one cold head；
Pressure chamber, the refrigeration machine freezes to the pressure chamber；It is characterized in that：Microwave resonance is provided with the pressure chamber
Chamber, is provided with fixing point part in microwave cavity.
2. the international temperature comparison device as claimed in claim 1 by low-temperature receiver of refrigeration machine, it includes：In the fixing point portion
Standard temperature element and tested temperature element are installed on part.
3. the international temperature comparison device as claimed in claim 1 by low-temperature receiver of refrigeration machine, it includes：The refrigeration machine includes
One-level cold head and two grades of cold heads.
4. the international temperature comparison device as claimed in claim 1 by low-temperature receiver of refrigeration machine, it includes：On the pressure chamber
It is provided with pressure chamber flange.
5. the international temperature comparison device as claimed in claim 1 by low-temperature receiver of refrigeration machine, it includes：The microwave cavity
On be disposed with connectivity structure and microwave antenna.
6. the international temperature comparison device as claimed in claim 1 by low-temperature receiver of refrigeration machine, it includes：Also include multiple flexibilities
Connection member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720100049.3U CN206450343U (en) | 2017-01-23 | 2017-01-23 | A kind of international temperature comparison device using refrigeration machine as low-temperature receiver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720100049.3U CN206450343U (en) | 2017-01-23 | 2017-01-23 | A kind of international temperature comparison device using refrigeration machine as low-temperature receiver |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644173A (en) * | 2017-01-23 | 2017-05-10 | 中国科学院理化技术研究所 | International temperature comparison device using refrigerator as cold source |
| CN111879705A (en) * | 2020-08-07 | 2020-11-03 | 中国科学技术大学先进技术研究院 | Mixed gas measuring method, mixed gas measuring system and storage medium |
| CN112484783A (en) * | 2020-12-04 | 2021-03-12 | 中国航空工业集团公司北京长城计量测试技术研究所 | Optical-based gas pressure and temperature high-precision synchronous measurement method |
-
2017
- 2017-01-23 CN CN201720100049.3U patent/CN206450343U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644173A (en) * | 2017-01-23 | 2017-05-10 | 中国科学院理化技术研究所 | International temperature comparison device using refrigerator as cold source |
| CN106644173B (en) * | 2017-01-23 | 2023-07-21 | 中国科学院理化技术研究所 | International temperature comparison device using refrigerator as cold source |
| CN111879705A (en) * | 2020-08-07 | 2020-11-03 | 中国科学技术大学先进技术研究院 | Mixed gas measuring method, mixed gas measuring system and storage medium |
| CN112484783A (en) * | 2020-12-04 | 2021-03-12 | 中国航空工业集团公司北京长城计量测试技术研究所 | Optical-based gas pressure and temperature high-precision synchronous measurement method |
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