CN207502031U - A kind of reference test bar for the calibration of superconducting line liquid level gauge - Google Patents
A kind of reference test bar for the calibration of superconducting line liquid level gauge Download PDFInfo
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- CN207502031U CN207502031U CN201721723287.6U CN201721723287U CN207502031U CN 207502031 U CN207502031 U CN 207502031U CN 201721723287 U CN201721723287 U CN 201721723287U CN 207502031 U CN207502031 U CN 207502031U
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- liquid level
- connecting rod
- level gauge
- test bar
- sensor
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Abstract
The utility model discloses a kind of reference test bar for the calibration of superconducting line liquid level gauge, including fixed plate, connecting rod, sensor mounting rod；The lower surface of the fixed plate is mounted on outside liquid helium vessel, and the lower surface of the fixed plate is connect by tapped through hole with connecting rod；The lower end of the connecting rod connects sensor mounting rod by threaded hole, and the both ends of the sensor mounting rod are provided with groove, liquid level sensor is equipped in the groove；The surface of the sensor mounting rod is provided with mounting hole, and temperature sensor is equipped in the mounting hole.The reference test bar of the utility model is fabricated using G10 materials, at low temperature contraction distortion very little, can install fixed liquid level flowmeter sensor well；The utility model mainly realizes calibration to superconducting line liquid level gauge by the method for comparing the label size in liquid level gauge measured value and connecting rod, and scaling method is simple and practical, precision is high.
Description
Technical field
The utility model belongs to refrigeration and cryogenic technology field, and in particular, to one kind is demarcated for superconducting line liquid level gauge
Reference test bar.
Background technology
Refrigeration Technique is that method manually produces temperature less than ambient enviroment, and keep this low temperature.Cryogenic technique
Typically by gases such as oxygen, nitrogen, hydrogen, helium through overcompression -- expansion and throttle effect obtain cryogenic liquid.Refrigeration and cryogenic technology
It is widely used in space flight, the energy, industrial and agricultural production and medicine etc..
In order to for longer periods preserve cryogenic liquid, the container with double-walled vacuum heat insulating construction is generally taken to store
And carrying liquefied gases, this kind equipment are referred to as low-temperature (low temperature) vessel, it is the general designation of Dewar type container, hold-up vessel and storage tank.
In low-temperature (low temperature) vessel, liquid level is not observed with the naked eye, therefore for the liquid level for indicating and controlling low-temperature (low temperature) vessel,
It needs sensor and experiences the liquid level variation of low-temperature (low temperature) vessel, and pass through converter and it is converted to the signal easily measured, finally lead to
Cross indicator output signal.This kind of device is referred to as liquid level gauge.
It is different according to the principle for measuring liquid level, hydrostatic liquid level gauge, thermoacoustic will be divided into for the liquid level gauge of low-temperature (low temperature) vessel
Oscillation type liquid level meter, capacitance level gauge and resistance type liquidometer.Wherein resistance type liquidometer is divided into as semiconductor resistor liquid level
Meter, metal wire liquid level gauge and superconducting line liquid level gauge.
Superconducting line liquid level gauge is normally only used for measuring liquid helium liquid level, and this liquid level gauge Sensor section is made by superconducting line,
The heater of insulated coiling certain length is powered in superconducting line, is when in use disposed vertically sensor and liquid level, certain
Operating current under, part of the superconducting line in liquid helium is superconduction, resistance zero, and in helium partly because there is heating
Device generates heat normally, has certain resistance, using this difference, liquid helium liquid is determined by the measurement to superconduction line resistance
The liquid level of the position in face, i.e. liquid helium.
Because superconducting line liquid level gauge is used to be operated in the cryogenic temperature of 4.2K, the requirement to sensor during liquid helium level gauging
Compare it is high, it is higher to the required precision of liquid level gauge simultaneously as liquid helium is a kind of cryogenic liquid of costliness.Therefore need to
It is demarcated in the superconducting line liquid level gauge of liquid helium level gauging, so as to judge whether liquid level gauge is qualified, and determines the essence of liquid level gauge
Degree.
Utility model content
The purpose of this utility model is to provide it is a kind of for superconducting line liquid level gauge calibration reference test bar and its scaling method,
Reference test bar includes sensor mounting rod, connecting rod and fixed plate, mainly by by the label in liquid level gauge measured value and connecting rod
The method that size is compared realizes the calibration to superconducting line liquid level gauge.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of reference test bar for the calibration of superconducting line liquid level gauge, including fixed plate, connecting rod, sensor mounting rod；
The fixed plate is mounted on outside liquid helium vessel, and the surface of the fixed plate is provided with tapped through hole, the company
Extension bar is secured by bolts in the surface of fixed plate；The lower surface of the connecting rod is provided with threaded hole, the sensor mounting rod
The lower surface of connecting rod is fixed on by threaded hole, the both ends of the sensor mounting rod are provided with groove, are installed in the groove
There is liquid level sensor；The surface of the sensor mounting rod is provided with mounting hole, and temperature sensor is equipped in the mounting hole；Institute
Reference test bar is stated to be fixed on connecting rod and sensor mounting rod in liquid helium vessel vertically by fixed plate.
Further, the connecting rod realizes upper underdrive by the fixed position of adjusting bolt, and the connecting rod is used for
Dimension mark is done on connecting rod length direction.
Further, the liquid level sensor is fastened by adhesive tape in groove.
Further, the temperature sensor is Cernox temperature sensors.
Further, the mounting hole is flushed with one end position of liquid level sensor.
Further, the reference test bar is fabricated using G10 materials.
The beneficial effects of the utility model：
The reference test bar of the utility model is fabricated using G10 materials, and contraction distortion very little, has simultaneously at low temperature
There is the characteristics of simple in structure, convenient processing and manufacture, fixed liquid level flowmeter sensor can be installed well, and can adapt to difference
The liquid helium Dewar of amount of capacity, while the advantages of there is assembling easy to disassemble, memory is facilitated to demarcate；The temperature that the utility model uses
Degree sensor is Cernox temperature sensors, and the high sensitivity in low temperature, sensitivity is good in gamut temperature range；This reality
It is mainly realized with novel by the method for comparing the label size on liquid level gauge measured value and connecting rod to superconducting line liquid
The calibration of position meter, scaling method is simple and practical, precision is high.
Description of the drawings
In order to facilitate the understanding of those skilled in the art, the utility model will be further described below with reference to the accompanying drawings.
Fig. 1 is a kind of structure diagram of reference test bar for the calibration of superconducting line liquid level gauge of the utility model.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with embodiment, it is clear that described
Embodiment be only the utility model part of the embodiment, instead of all the embodiments.Based on the reality in the utility model
Example is applied, all other embodiment that those of ordinary skill in the art are obtained without creative efforts all belongs to
In the range of the utility model protection.
A kind of reference test bar for the calibration of superconducting line liquid level gauge, as shown in Figure 1, including fixed plate 1, connecting rod 2, sensor
Mounting rod 3；Fixed plate 1 is mounted on outside liquid helium vessel, and the surface of fixed plate 1 is provided with tapped through hole, and connecting rod 2 passes through spiral shell
Bolt is fixed on the surface of fixed plate 1, and connecting rod 2 can realize upper underdrive by the fixed position of adjusting bolt, and connecting rod 2 is used for
Dimension mark is done on connecting rod length direction；The lower surface of connecting rod 2 is provided with threaded hole, and sensor mounting rod 3 passes through screw thread
Hole is connected and fixed on the lower surface of connecting rod 2, and the both ends of sensor mounting rod 3 are provided with groove, level sensing is equipped in groove
Device 4, liquid level sensor 4 are fastened by adhesive tape in groove；The surface of sensor mounting rod 3 is provided with mounting hole, mounting hole
Temperature sensor 5 is inside installed, temperature sensor 5 is Cernox temperature sensors, and mounting hole is located at and 4 both ends of liquid level sensor
At the position that position flushes；Connecting rod 2 and sensor mounting rod 3 are fixed in liquid helium vessel vertically by fixed plate 1；It is described
Reference test bar is fabricated using G10 materials, material contraction distortion very little, while have simple in structure, processing system at low temperature
Make the characteristics of facilitating；
A kind of scaling method of reference test bar for the calibration of superconducting line liquid level gauge, includes the following steps：
(1) dimension mark is carried out to connecting rod 2；
(2) assembling test bar：Connecting rod 2, fixed plate 1 and sensor mounting rod 3 are fitted together, referred on mounting rod
Installation liquid level sensor and Cernox temperature sensors are put in positioning；
(3) liquid level sensor with liquid level gauge is connected, start liquid level gauge and preheated；
(4) reference test bar is pre-chilled in liquid helium tank；
(5) it is vertical slowly toward decentralization to continue reference test bar, while monitors temperature reading to assist instruction reference test bar position；
(6) when reference test bar starts to contact liquid level, liquid level gauge begins with reading and shows；
(7) record liquid level gauge reading is compared with the label size variation in connecting rod, realizes the calibration to liquid level gauge.
The preferred embodiment in the utility model disclosed above is only intended to help to illustrate the utility model.Preferred embodiment is simultaneously
There is no the details that detailed descriptionthe is all, it is only the specific embodiment also not limit the utility model.Obviously, according to this theory
The content of bright book can make many modifications and variations.This specification is chosen and specifically describes these embodiments, is in order to preferably
The principle and practical application of the utility model is explained, so as to which skilled artisan be enable to be best understood by and utilize this
Utility model.The utility model is limited only by the claims and their full scope and equivalents.
Claims (6)
1. a kind of reference test bar for the calibration of superconducting line liquid level gauge, which is characterized in that including fixed plate (1), connecting rod (2), pass
Sensor mounting rod (3)；
The fixed plate (1) is mounted on outside liquid helium vessel, and the surface of the fixed plate (1) is provided with tapped through hole, described
Connecting rod (2) is secured by bolts in the surface of fixed plate (1)；The lower surface of the connecting rod (2) is provided with threaded hole, the biography
Sensor mounting rod (3) is fixed on the lower surface of connecting rod (2) by threaded hole, and the both ends of the sensor mounting rod (3) are provided with
Groove is equipped with liquid level sensor (4) in the groove；The surface of the sensor mounting rod (3) is provided with mounting hole, the peace
Dress is equipped with temperature sensor (5) in hole；The reference test bar is by fixed plate (1) by connecting rod (2) and sensor mounting rod (3)
It is fixed in liquid helium vessel vertically.
A kind of 2. reference test bar for the calibration of superconducting line liquid level gauge according to claim 1, which is characterized in that the connection
Bar (2) realizes upper underdrive by the fixed position of adjusting bolt, and the connecting rod (2) on connecting rod length direction for doing
Dimension mark.
A kind of 3. reference test bar for the calibration of superconducting line liquid level gauge according to claim 1, which is characterized in that the liquid level
Sensor (4) is fastened by adhesive tape in groove.
A kind of 4. reference test bar for the calibration of superconducting line liquid level gauge according to claim 1, which is characterized in that the temperature
Sensor (5) is Cernox temperature sensors.
A kind of 5. reference test bar for the calibration of superconducting line liquid level gauge according to claim 1, which is characterized in that the installation
Hole is flushed with (4) one end position of liquid level sensor.
A kind of 6. reference test bar for the calibration of superconducting line liquid level gauge according to claim 1, which is characterized in that the test
Bar is fabricated using G10 materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721723287.6U CN207502031U (en) | 2017-12-12 | 2017-12-12 | A kind of reference test bar for the calibration of superconducting line liquid level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721723287.6U CN207502031U (en) | 2017-12-12 | 2017-12-12 | A kind of reference test bar for the calibration of superconducting line liquid level gauge |
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| Publication Number | Publication Date |
|---|---|
| CN207502031U true CN207502031U (en) | 2018-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721723287.6U Active CN207502031U (en) | 2017-12-12 | 2017-12-12 | A kind of reference test bar for the calibration of superconducting line liquid level gauge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843317A (en) * | 2017-12-12 | 2018-03-27 | 合肥中科离子医学技术装备有限公司 | A kind of reference test bar and its scaling method for the demarcation of superconducting line liquid level gauge |
-
2017
- 2017-12-12 CN CN201721723287.6U patent/CN207502031U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843317A (en) * | 2017-12-12 | 2018-03-27 | 合肥中科离子医学技术装备有限公司 | A kind of reference test bar and its scaling method for the demarcation of superconducting line liquid level gauge |
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