CN206670749U - A kind of caliberating device of deep cooling liquid level measuring appliance - Google Patents
A kind of caliberating device of deep cooling liquid level measuring appliance Download PDFInfo
- Publication number
- CN206670749U CN206670749U CN201720382773.XU CN201720382773U CN206670749U CN 206670749 U CN206670749 U CN 206670749U CN 201720382773 U CN201720382773 U CN 201720382773U CN 206670749 U CN206670749 U CN 206670749U
- Authority
- CN
- China
- Prior art keywords
- liquid level
- caliberating device
- measuring appliance
- deep cooling
- instlated tubular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model discloses a kind of scaling method of deep cooling liquid level measuring appliance, measuring range and its deadweight using tested liquid level gauge, according to formula one：MAlways=M1+M2+ S* ρ * h*K calculate the gross mass of each calibration point position；Demarcated by selected liquid level calibration point, liquid level gauge carries it into calculation formula one after showing value stabilization, obtains the gross mass under the liquid level gauge stated accuracy；The mass indicating value of high-precision electronic scale is contrasted, judges the calibration point（Include the high-precision electronic scale limits of error）Liquid level gauge precision；By that analogy, the staking-out work of remaining calibration point is completed；Whole calibration process is easy to operate so that measuring appliance also can intuitively, reliably examine and determine a range of measurement accuracy of liquid level gauge under cryogenic environment.
Description
Technical field
A kind of caliberating device of level gauging utensil is the utility model is related to, particularly a kind of deep cooling liquid level measuring appliance
Caliberating device.
Background technology
In technical field of liquid level measurement, the measurement accuracy of measuring appliance determines the degree of accuracy of level value, for enterprise
The manufacturing has great importance, therefore, before work is measured, for measuring appliance precision calibration link to close weight
Will.
In the prior art, the demarcation of liquid level gauge generally misses by using liquid level gauge water tank calibrating installation to examine and determine its indicating value
Difference, for water tank calibrating installation because device is existing error in itself, its stated accuracy to liquid level gauge is not high enough, and water tank is examined and determine
Device can not intuitively embody the liquid level error of indication of liquid level gauge under cryogenic environment, and the demarcation to liquid level gauge under cryogenic environment can not
Play Essential Action.
The content of the invention
The purpose of this utility model is：For above-mentioned problem, there is provided a kind of mark of deep cooling liquid level measuring appliance
Determine device, by changing different liquid levels of the liquid nitrogen in caliberating device, precision calibration, whole demarcation are carried out to measuring appliance
Process operation is easy, and accuracy is high, and liquid level gauge also can intuitively, be reliably examined and determine under cryogenic environment in certain limit（Include height
The precision electronic scale limits of error）Under measurement accuracy, ensure that the measurement accuracy of measuring appliance.
The technical solution adopted in the utility model is as follows：
A kind of scaling method of deep cooling liquid level measuring appliance, this method comprise the following steps：
Step 1, caliberating device is placed on high-precision electronic scale, and tested liquid level gauge is loaded in the caliberating device；
Step 2, the inner space volume for calculating caliberating device, and carry out respective record；Liquid level gauge is calculated inside device
Locus and its volume, and carry out respective record；
Step 3, inner space volume and liquid nitrogen density value with reference to caliberating device in step 2, according to formula one：MAlways=M1+
M2+ S* ρ * h*K, calculate the gross mass M under different liquid levelsAlways；The different liquid level be each calibration point position/
Stated accuracy position；Wherein, M1：Device quality, M2：Liquid level gauge quality, S：Liquid nitrogen horizontal sectional area in device, ρ：Liquid nitrogen density, h：
Liquid level, K：Liquid level gauge precision；
Step 4, according to formula one calculate be calibrated M of the liquid level gauge under any liquid levelAlways；
Step 5, liquid nitrogen is injected into caliberating device, high-precision electronic scale indicating value reaches the M that gained is calculated in step 4AlwaysAfterwards,
Stop liquid nitrogen injection；
After the liquid nitrogen injected in step 6, waiting step 5 tends to be steady in caliberating device, it is likely to occur in remove device
Frost/water, start demarcation measurement；
The level readings indicating value of liquid level gauge, brings calculation formula one into and calculates M in step 7, record caliberating deviceAlways；Will meter
The M calculatedAlwaysCompared with the quality readings indicating value of now high-precision electronic scale, measurement point stated accuracy is judged, and do easy to remember
Record, so far the first Point Measurement completion；
Step 8, the amount for changing liquid nitrogen in caliberating device, while frost/water on caliberating device is removed, in device to be calibrated
After liquid nitrogen is steady, the level readings indicating value of now liquid level gauge in caliberating device is recorded, calculation formula one is brought into and calculates MAlways, remember simultaneously
The quality readings indicating value of high-precision electronic scale is recorded, two groups of data is contrasted and makes a record, so far second point position is measured；
The measuring method of step 9, repeat step 8, complete the measurement record of multiple point positions；
The measurement correction data of step 10, all measurement points completed according to step 9, judge liquid level gauge under liquid nitrogen operating mode
The precision and available accuracy of mark, and provide report.
, will be every using the change of its quality and height of liquid nitrogen in the caliberating device by using above-mentioned scaling method
The value of quality and height that individual point position corresponds to liquid nitrogen is measured, and calculates M by formula oneAlways, with now respective point position high-precision
The M measured on degree electronic scaleAlwaysIt is compared, and carries out respective record, such first calibration point position is measured；Using same
The principle of sample, the amount of liquid nitrogen in caliberating device is changed, then reads the liquid nitrogen quality and height of corresponding points position after changing
Value, and another M is calculated by formula oneAlwaysValue, and the M with now being measured on high-precision electronic scale againAlwaysIt is compared, and
Respective record is carried out, second calibration point position is measured；Same demarcation action is repeated, after measuring some calibration point positions,
The contrast of related data is carried out, the measurement accuracy of liquid level gauge is judged, just can realize under cryogenic environment to measuring appliance
Demarcation；Whole calibration process is easy to operate so that measuring appliance under cryogenic environment also can intuitively, reliably examine and determine liquid level gauge
Measurement accuracy.
Further, in step 5, the amount of liquid nitrogen of injection is the capacity under the maximum range for being calibrated liquid level gauge.
Further, in step 8, the change of liquid nitrogen capacity is realized in a manner of releasing certain amount of liquid nitrogen.
By the way that the first measurement point position is arranged into maximum capacity point, so that measurement point position is surveyed from highest order to lowest order
Amount, this not only reduces the frost of caliberating device in calibration process/water loading Area processing, moreover it is possible to after ensureing tapping, liquid nitrogen liquid level
Fast and stable, so as to the measurement of next calibration point position of quickly entering, ensure the stable progress of measurement process, improve demarcation
Efficiency；The change of nitrogen quantity can also realize that the utility model is used and put by increasing amount of liquid nitrogen by releasing amount of liquid nitrogen
Liquid mode changes the amount of liquid nitrogen so that it also avoid splashing phenomenon during liquid nitrogen increase while simple operation,
So as to influence measurement precision.
A kind of caliberating device of deep cooling liquid level measuring appliance of the present utility model, it includes demarcation cylinder and tapping mechanism；Institute
Stating calibrating tube includes calibrating tube and instlated tubular；The tapping mechanism is connected with calibrating tube.
Further, the calibrating tube is located in instlated tubular；The calibrating tube is suspended at instlated tubular by adiabatic supporting pad
It is interior, so that forming clearance layer with heating inside pipe wall on the outside of the tube wall of calibrating tube；The clearance layer is heat insulation layer.
Further, the heat insulation layer is vacuum heat-insulating layer；The instlated tubular is provided with vacuum pumping hole, for demarcating
Device vacuumizes use.
Because using said structure, caliberating device integrally helps the guarantor of vacuum environment under the heat-blocking action of vacuum heat insulation tube
Shield, heat output is effectively reduced, reduce frosting probability, ensure that the precision of the change of liquid nitrogen liquid level, so as to ensure that demarcation dress
The stated accuracy put.
The caliberating device of deep cooling liquid level measuring appliance of the present utility model, the tapping mechanism include drain pipe and tapping
Valve；The drain pipe is connected with calibrating tube, and drain pipe is provided with bleeder valve.
Further, the calibrating tube is provided with inlet and liquid outlet；The drain pipe is connected with liquid outlet, and is stretched out
Outside instlated tubular.
By using said structure, the liquid nitrogen in calibrating tube realizes liquid nitrogen through drain pipe discharge liquor by the folding of bleeder valve
Nitrogen quantity, the high-precision electronic scale under caliberating device record the quality for releasing liquid nitrogen, are easy to the control of liquid nitrogen mass change simultaneously.
The caliberating device of deep cooling liquid level measuring appliance of the present utility model, the calibrating tube are located at the centre bit of instlated tubular
Put, demarcation bottom of the tube is connected by adiabatic supporting pad with heat-insulated bottom of the tube；The calibrating tube side wall also by adiabatic support bar with
The side wall connection of instlated tubular.
Due to being suspended at instlated tubular in the presence of adiabatic supporting pad and adiabatic support bar using said structure, calibrating tube
In pipe so that calibrating tube is all placed under vacuum environment, its uniformity protected by vacuum heat-insulation is ensure that, beneficial to demarcation
Complete.
In summary, by adopting the above-described technical solution, the beneficial effects of the utility model are：
1st, the caliberating device of deep cooling liquid level measuring appliance of the present utility model is easy, simple operation, and stated accuracy is high；
2nd, whole calibration process is protected by using vacuum heat-insulation, greatly reduces the liquid nitrogen being likely to occur in calibration process
The probability of frosting/water so that liquid level gauge reading shows that finger is reliable, and calibration result is accurate；
3rd, by using caliberating device of the present utility model, it can realize that measuring appliance also can intuitively, reliably in cryogenic environment
Calibrating its measurement accuracy；
4th, caliberating device of the present utility model, simple in construction, operational stability is good, and stated accuracy is high.
Brief description of the drawings
Fig. 1 is the structure diagram of the caliberating device of the utility model deep cooling liquid level measuring appliance；
Marked in figure：1- calibrating tubes, 2- instlated tubulars, 3- vacuum heat-insulating layers, 4- thermal insulation supporting pads, 5- drain pipes, 6- tapping
Valve, 7- thermal insulation support bars, 8- liquid nitrogen, 9- liquid level gauges, 10- high-precision electronic scales.
Embodiment
The utility model is described in detail with reference to embodiment.
In order that the object, technical solution and advantage of invention are more clearly understood, it is with reference to embodiments, new to this practicality
Type is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the utility model, and
It is not used in restriction the utility model.
Embodiment 1
A kind of scaling method of deep cooling liquid level measuring appliance, this method comprise the following steps：
Step 1, caliberating device is placed on high-precision electronic scale, and tested liquid level gauge is loaded in the caliberating device；
Step 2, the inner space volume for calculating caliberating device, and carry out respective record；Liquid level gauge is calculated inside device
Locus and its volume, and carry out respective record；
Step 3, inner space volume and liquid nitrogen density value with reference to caliberating device in step 2, according to formula one：
MAlways=M1+M2+S*ρ*h*K（During full scale, gross mass during in order to calculate true altitude, without using K systems during calculating
Number）, calculate the gross mass M under different liquid levelsAlways；The different liquid level is each calibration point position/demarcation essence
Spend position；Wherein, M1：Device quality, M2：Liquid level gauge quality, S：Liquid nitrogen horizontal sectional area in device, ρ：Liquid nitrogen density, h：Liquid level is high
Degree, K：Liquid level gauge precision；
Step 4, according to formula one calculate be calibrated M of the liquid level gauge under any liquid levelAlways, for ease of the survey of a position
Amount, the liquid level set the liquid level being calibrated under the larger range of liquid level gauge as far as possible；
Step 5, liquid nitrogen is injected into caliberating device, high-precision electronic scale indicating value reaches the M that gained is calculated in step 4AlwaysAfterwards,
Stop liquid nitrogen injection；
After the liquid nitrogen injected in step 6, waiting step 5 tends to be steady in caliberating device, it is likely to occur in remove device
Frost/water, start demarcation measurement；
The level readings indicating value of liquid level gauge, brings calculation formula one into and calculates M in step 7, record caliberating deviceAlways；Will meter
The M calculatedAlwaysCompared with the quality readings indicating value of now high-precision electronic scale, measurement point is judged（Include high-precision electronic scale
The limits of error）Stated accuracy, and make a record, so far the first Point Measurement is completed；Because high-precision electronic scale can be straight
That sees draws MAlwaysValue, therefore with M in this programmeAlwaysAs a comparison value come measure the precision of utensil judge, but except this with
Outside, can also be calculated by formula one, by quality coefficient K values or device mass M1Or liquid level gauge mass M2Etc. correlation
Calculate data to be as a comparison worth to carry out the judgement of precision, this programme does not limit, all with what this programme operating principle was made to appoint
What modifications, equivalent substitutions and improvements etc., should be included within scope of protection of the utility model.
Step 8, the amount for changing liquid nitrogen in caliberating device, while frost/water on caliberating device is removed, in device to be calibrated
After liquid nitrogen is steady, the level readings indicating value of now liquid level gauge in caliberating device is recorded, calculation formula one is brought into and calculates MAlways, remember simultaneously
The quality readings indicating value of high-precision electronic scale is recorded, two groups of data is contrasted and makes a record, so far second point position is measured；Change
The amount of liquid nitrogen can realize that this programme does not limit by way of reducing and either increasing or increase and decrease combination in caliberating device
Fixed, to make simple operation, this programme carries out liquid level point from a high position to low level the point demarcation of liquid level gauge.
The measuring method of step 9, repeat step 8, complete the measurement record of multiple point positions；
The measurement correction data of step 10, all measurement points completed according to step 9, judge liquid level gauge under liquid nitrogen operating mode
The precision and available accuracy of mark, and provide report.
Embodiment 2
As shown in figure 1, a kind of caliberating device of deep cooling liquid level measuring appliance, it includes demarcation cylinder and tapping mechanism；Demarcation
Cylinder includes calibrating tube 1 and instlated tubular 2；Tapping mechanism is connected with calibrating tube 1；Calibrating tube 1 is located in instlated tubular 2；Calibrating tube 1 passes through
Adiabatic supporting pad 4 is suspended in instlated tubular 2, so that forming clearance layer with heating inside pipe wall on the outside of the tube wall of calibrating tube 1；Between
Gap layer is heat insulation layer；Heat insulation layer is vacuum heat-insulating layer 3；Instlated tubular 2 is provided with vacuum pumping hole, is vacuumized for caliberating device
With；Tapping mechanism includes drain pipe 5 and bleeder valve 6；Drain pipe 5 is connected with calibrating tube 1, and drain pipe 5 is provided with bleeder valve 6；Mark
Fixed tube 1 is provided with inlet and liquid outlet；Drain pipe 5 is connected with liquid outlet, and is stretched out outside instlated tubular 2；Calibrating tube 1 is positioned at heat-insulated
The center of pipe 2, the bottom of calibrating tube 1 are connected by adiabatic supporting pad 4 with the bottom of instlated tubular 2；The side wall of calibrating tube 1 is also by exhausted
Hot support bar 7 is connected with the side wall of instlated tubular 2；Whole caliberating device is placed on high-precision electronic scale 10, calibrating tube 1 during use
Inside puts figure liquid level gauge 9 and injects liquid nitrogen 8, the liquid nitrogen 8 of set quality is constantly released by drain pipe 5, while liquid level gauge 9 is read
Change in elevation of the liquid nitrogen 8 in calibrating tube 1, some data measured with before determining by the corresponding data that actually calculates compared with,
The measurement accuracy of measuring appliance can be drawn, demarcation is completed.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Within protection domain.
Claims (6)
- A kind of 1. caliberating device of deep cooling liquid level measuring appliance, it is characterised in that：It includes demarcation cylinder and tapping mechanism；The mark Safety barrel includes calibrating tube（1）And instlated tubular（2）；The tapping mechanism and calibrating tube（1）Connection.
- 2. the caliberating device of deep cooling liquid level measuring appliance according to claim 1, it is characterised in that：The calibrating tube（1） Positioned at instlated tubular（2）It is interior；The calibrating tube（1）Pass through adiabatic supporting pad（4）It is suspended at instlated tubular（2）It is interior, so that demarcation Pipe（1）Tube wall on the outside of with heating inside pipe wall formed clearance layer；The clearance layer is heat insulation layer.
- 3. the caliberating device of deep cooling liquid level measuring appliance according to claim 2, it is characterised in that：The heat insulation layer is true Empty heat insulation layer（3）；The instlated tubular（2）Vacuum pumping hole is provided with, use is vacuumized for caliberating device.
- 4. the caliberating device of the deep cooling liquid level measuring appliance according to claim 1 or 2 or 3, it is characterised in that：The tapping Mechanism includes drain pipe（5）And bleeder valve（6）；The drain pipe（5）With calibrating tube（1）Connection, drain pipe（5）It is provided with tapping Valve（6）.
- 5. the caliberating device of deep cooling liquid level measuring appliance according to claim 4, it is characterised in that：The calibrating tube（1） It is provided with inlet and liquid outlet；The drain pipe（5）It is connected with liquid outlet, and stretches out instlated tubular（2）Outside.
- 6. the caliberating device of the deep cooling liquid level measuring appliance according to Claims 2 or 3 or 5, it is characterised in that：The demarcation Pipe（1）Positioned at instlated tubular（2）Center, calibrating tube（1）Bottom passes through adiabatic supporting pad（4）With instlated tubular（2）Bottom connects Connect；The calibrating tube（1）Side wall also passes through adiabatic support bar（7）With instlated tubular（2）Side wall connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720382773.XU CN206670749U (en) | 2017-04-13 | 2017-04-13 | A kind of caliberating device of deep cooling liquid level measuring appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720382773.XU CN206670749U (en) | 2017-04-13 | 2017-04-13 | A kind of caliberating device of deep cooling liquid level measuring appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206670749U true CN206670749U (en) | 2017-11-24 |
Family
ID=60380656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720382773.XU Active CN206670749U (en) | 2017-04-13 | 2017-04-13 | A kind of caliberating device of deep cooling liquid level measuring appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206670749U (en) |
-
2017
- 2017-04-13 CN CN201720382773.XU patent/CN206670749U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6288027B2 (en) | Calibration apparatus and calibration method | |
| JPS62223640A (en) | System for detecting leakage in liquid storage tank | |
| CN105758558A (en) | Thermistor temperature sensor calibrating apparatus | |
| CN101839738A (en) | Wet steam flow instrument and measuring method | |
| CN106950150A (en) | Liquid density measurement device and method | |
| US4618268A (en) | Method and apparatus for sensing average temperature | |
| CN206670749U (en) | A kind of caliberating device of deep cooling liquid level measuring appliance | |
| TW201730528A (en) | Continuous liquid level measurement detector for closed metal containers | |
| CN107063404A (en) | A kind of scaling method of deep cooling liquid level measuring appliance | |
| RU98579U1 (en) | MOBILE INSTALLATION FOR VERIFICATION OF MEASURES FOR WEIGHT OR VOLUME FLOW | |
| CN106768159A (en) | A kind of nuclear power station reactor core level sensor | |
| CN218403670U (en) | Urea filling machine calibrating device | |
| CN110470364A (en) | A kind of device and method of pVTt method volumetric standard volumetric calibration | |
| Ooiwa et al. | New mercury interferometric baromanometer as the primary pressure standard of Japan | |
| CN206540588U (en) | A kind of nuclear power station reactor core level sensor | |
| CN105806742B (en) | A kind of gamma ray density measuring system and method for subzero temperature high pressure | |
| JP6475647B2 (en) | Refrigerant leak detection device in refrigeration cycle | |
| CN107300512A (en) | Intelligent densitometer | |
| CN106643995A (en) | Calibrating device for fuel oil re-fuelling device and use method thereof | |
| CN206695877U (en) | A kind of water meter fully-automatic laser gathers checking table | |
| CN202133437U (en) | Self-calibration drop type pressure liquid level meter | |
| CN207096032U (en) | Intelligent densitometer | |
| CN206670746U (en) | A kind of fuel charger calibrating installation | |
| CN110763311A (en) | Automatic detection equipment and detection method for ultrasonic evaporation sensor | |
| CN214471215U (en) | Water meter flow metering and checking device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |