CN206321315U - The density calibration system of mass flowmenter - Google Patents
The density calibration system of mass flowmenter Download PDFInfo
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- CN206321315U CN206321315U CN201621260926.5U CN201621260926U CN206321315U CN 206321315 U CN206321315 U CN 206321315U CN 201621260926 U CN201621260926 U CN 201621260926U CN 206321315 U CN206321315 U CN 206321315U
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Abstract
The utility model provides a kind of density calibration system of mass flowmenter, and the system includes：Volumetric solution device, it is used to provide a variety of density different volumetric solutions；Solution pump, it, which is used to providing power, flows volumetric solution in calibration pipeline with certain pressure；Standard scale is uniformly installed in the calibration pipeline with multiple mass flowmenters to be measured along the solution pump output terminal；The standard scale is used for for the density of volumetric solution in calibration pipeline；Computer, it connects multiple mass flowmenters to be measured, standard scale and switch respectively；It is used for the density for controlling the volumetric solution of the switch switching different medium to demarcate the mass flowmenter, and the density calibration coefficient of calculating is write into corresponding mass flowmenter according to density calibration Mathematical Modeling.Using computer in the density of the volumetric solution, repeatedly measurement mass flowmenter of different medium, the density of mass flowmenter to be measured is calculated by density calibration Mathematical Modeling, the efficiency and precision of demarcation is improved.
Description
Technical field
The utility model belongs to instrument calibration technical field, the density calibration system of more particularly to a kind of mass flowmenter
System.
Background technology
Mass flowmenter, i.e. Coriolis force mass flowmenter, it is come the one of R ＆ D design using fluid mechanics principle
Money flow measurement instrument instruments and meters.It is mainly used in measurement gas, the mass flow and density of liquid, and mass flow and density
Parameter needed for the engineerings such as the volume flow, gross mass, the cumulative volume that are derived.The measurable liquid scope of mass flowmenter compares
Extensively, the various liquid of high viscosity liquid are included, the slurries containing solid content, the liquid containing a small amount of uniform gas distribution has foot
The gas of enough density, the gas of such as high pressure.It is total and, it can measure liquid, suspension, the mass flow of emulsion and gas,
Density and temperature.
For the foundation and realization of the mass flow Mathematical Modeling of mass flowmenter, and the stream of demarcation is realized aborning
There is substantial amounts of elaboration in journey, many papers, periodical and patent at home and abroad, be available for parametric technique innumerable, but
Mathematical Modeling in terms of density is simultaneously few to the documents and materials referred on scaling method and related calibration facility.For quality
For flowmeter, the first parameter is mass flow, and associated with it and correspondence direct proportion output parameter is exactly sensor measuring tube
The phase difference of both sides detection output sinusoidal signal；Second parameter is density, and the intrinsic mechanical frequency in it and sensor itself is related,
The only presence of the second non-parametric density, just has the engineerings such as the volume flow being derived by mass flow and density and cumulative volume
Parameter.So being used to measure various Common fluids, unconventional stream in the various fields such as oil, petrochemical industry, papermaking, food, pharmacy
Mass flow will be used during the parameter such as body, slurries, mass flow, density, the volume flow of liquid gas and compressed natural gas
Meter.Therefore, for the life manufacturer of mass flowmenter, the design for improving mass flow meter sensor, production and processing work are improved
Skill, and mass flow caliberating device, density calibration device are most important.
As shown in figure 1, be the structural representation of existing Coriolis force mass flowmenter density calibration system, wherein,
Low pressure cylinder, it is used to deposit the low pressure dry air for being less than 5 atmospheric pressures；Air valve, it is used to control in low pressure cylinder
Low-pressure gas enters the switch of calibration pipeline；Volumetric solution vessel, it is used for the medium solution for holding density calibration, is generally designated
Solution is matched in the vessel；Solution inlet port end, its be density calibration solution initiating terminal, be designed as it is funneling, be easy to demarcation
Solution flows into the phenomenon of sensor measuring tube road and side leakage free by this port；Calibration pipeline, it is used to demarcate medium solution stream
The passage of warp；Mass flowmenter, it is the mass flowmenter for treating density calibration；Stationary base mount, it is concrete stake, for fixed dress
Folder treats the mass flowmenter of density calibration；Taphole end, it is the terminal of density calibration pipeline, is designed as funneling, is easy to
Volumetric solution is flowed into by this port in the container of metered volume；Switch, it is used to control density calibration solution to flow into volume appearance
The amount of tool；Volume container, it is used for the medium solution for holding density calibration, while measuring the volume of density calibration solution；Electronics
Claim, it is used for the quality of density calibration solution in metered volume container.
The scaling method flow of the density calibration system of mass flowmenter in Fig. 1, details are as follows：
Step 1, mass flowmenter density calibration system is placed in 25 DEG C of constant temperature secret room, simultaneously so that air valve and mark
The switch for determining duct end is in closed mode；
Step 2, by mass flowmenter to be measured, mode as shown in Figure 1 be installed in calibration pipeline, and ensures mark
Fixed tube road and mass flowmenter mounting flange are in sealing state, i.e. No leakage phenomenon, simultaneously, it is ensured that mass flowmenter housing with
Ground is vertical；
Step 3, the mass flowmenter for treating density calibration is worked on power, while by the mark of more than 5 kinds different densities
Determine solution (medium solution 1, medium solution 2, medium solution 3 ...) to be also positioned in the secret room for density calibration, keeping should
Worked under state 180 minutes or so, the purpose is to make the whole system and density calibration solution of mass flowmenter density calibration
Temperature or infinite approach identical with secret room temperature；
Step 4, gather in current 25 DEG C of constant temperature secret room and treat that density calibration mass flowmenter is changed in current calibration pipeline
The blank pipe frequency of output transducer on device；
Step 5, the closure above solution inlet port end is opened, density calibration medium solution 1 is passed through into volumetric solution vessel
Device slowly pours into solution inlet port end, the level change at observation taphole end, when liquid level is close to the top at taphole end
When, stop solution inlet port end and continue to pour into density calibration medium solution 1；
Step 6, it is delayed 2 minutes, when density calibration medium solution 1 is in plateau in calibration pipeline device,
Gather the frequency values of output transducer on current Quality flowmeter converter；
Step 7, the switch of slow regulation calibration pipeline terminal, electricity is emitted into by the density calibration medium solution 1 in pipeline
In the container of sub- upper end, the discharge rate of density calibration medium solution 1 is set to reach the position of container 1000ml scales；
Step 8, the quality registration of metering 1000ml density calibrations medium solution 1 on electronic scale is obtained, and by density calibration
Medium solution 1 is refunded in original solution device, and exchange for identical capacity drying container place electronic scale above；
Step 9, the closure above solution inlet port end is compressed into solution inlet port end, slow adjusting air valve, until that will demarcate
Density calibration medium solution 1 in pipeline is driven away outside calibration pipeline, closes air valve；
Step 10, repeat step 5~9, complete other density calibration medium solutions (medium solution 2, medium solution 3 ...)
Demarcation flow；
Step 11, according to density calibration record data, the bulkfactor for treating density calibration mass flowmenter is calculated, and will be
Number is write by way of button operation into the EEPROM of mass flowmenter converter；
Step 12, the density accuracy detection and repeatability detection of mass flowmenter are carried out；
Step 13, the closure above solution inlet port end and the switch of calibration pipeline terminal are opened, by density calibration medium
Solution 1 slowly pours into the change of liquid level in solution inlet port end, observation container by volumetric solution capsule means, when liquid level is carved
When degree is close to 1000ml, the switch of calibration pipeline terminal is closed, continues to pour into appropriate density calibration Jie to solution inlet port end
Matter solution 1；
Step 14, the aperture of the switch of fine setting calibration pipeline terminal, until in the drippage value container of density calibration medium solution 1
Reach 1000ml graduation positions position, collection current Quality flowmeter converter output density value and electronic scale metering density calibration
The gross mass of medium solution 1；
Step 15, the closure above solution inlet port end is compressed into solution inlet port end, finely tunes air valve, until by calibration pipeline
Interior density calibration medium solution 1 is driven away outside calibration pipeline, closes air valve；
Step 16, repeat step 13~15, complete other density verifying process flows for choosing density calibration medium solution；
Step 17, the density output accuracy and repeatability of mass flowmenter are calculated.
In existing Coriolis force mass flowmenter density calibration system, 3 mass flowmenters of receiving are at most only capable of
Density calibration and detection, significantly reduce the demarcation efficiency of mass flowmenter；Meanwhile, in the whole flow demarcated with detection
In, it is necessary to manually to participate in, and volumetric solution density be using small container as metered volume, electronic scale gauging calibration solution
Quality, the density criterion value of volumetric solution is determined by calculating.However, these factors can bring a certain degree of gauging calibration to miss
Difference, reduces the precision of whole mass flowmenter density calibration system.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is provide a kind of mass flowmenter close
Spend calibration system, for solve in the prior art mass flowmenter in density calibration, it is necessary to which artificial operation causes whole quality
The efficiency of flowmeter density calibration is low with the low problem of precision.
In order to achieve the above objects and other related objects, the utility model provides a kind of density calibration system of mass flowmenter
System, including：
Volumetric solution device, it is used to provide a variety of density different volumetric solutions；Solution pump, it is used to provide power general
Volumetric solution is flowed in calibration pipeline with certain pressure；Standard scale is defeated along the solution pump with multiple mass flowmenters to be measured
Go out end to be uniformly installed in the calibration pipeline；The standard scale is used for for the density of volumetric solution in calibration pipeline；Computer,
It connects multiple mass flowmenters to be measured, standard scale and switch respectively；It is used to control the switch switching different medium
Volumetric solution demarcates the density of the mass flowmenter, writes the density calibration coefficient of calculating according to density calibration Mathematical Modeling
Corresponding mass flowmenter.
As described above, the density calibration system of mass flowmenter of the present utility model, has the advantages that：
By by original manually-operated density calibration system replacement be computer controlled automatic density calibration system, phase
Quantity is demarcated every time by three for original density calibration system and become ten, improve the efficiency of the demarcation of product；Using
Computer operated switch switches in the volumetric solution of different medium, and the close of mass flowmenter is repeatedly measured under every kind of volumetric solution
Completely without artificially participating in degree, calibration process, the density of mass flowmenter to be measured is calculated by density calibration Mathematical Modeling, no
The calibrated error of traditional quality volumetric manner is only prevented, the precision of mass flowmenter density calibration has also been greatly improved；Together
When, constant pressure and flow tank is introduced in density calibration system, is eliminated because of the volumetric solution trickle that solution pump is operationally produced
The problem of with air bubble, inherently improve the stated accuracy of mass flowmenter.
Brief description of the drawings
Fig. 1 is shown as the structural representation of the existing Coriolis force mass flowmeter calibration system of the utility model offer
Figure；
Fig. 2 is shown as a kind of density calibration system construction drawing of mass flowmenter of the utility model offer；
Fig. 3 is shown as a kind of example structure figure of the density calibration system of mass flowmenter of the utility model offer.
Embodiment
Embodiment of the present utility model is illustrated by particular specific embodiment below, those skilled in the art can be by this
Content disclosed by specification understands other advantages of the present utility model and effect easily.
Fig. 2 is referred to Fig. 3.It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., is only used to
Coordinate the content disclosed in specification, so that those skilled in the art is understood with reading, be not limited to the utility model
Enforceable qualifications, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or size
Adjustment, in the case where not influenceing the utility model effect that can be generated and the purpose that can reach, all should still fall in the utility model
Disclosed technology contents are obtained in the range of covering.Meanwhile, in this specification it is cited as " on ", " under ", " left side ",
The term on " right side ", " centre " and " one " etc., is merely convenient to understanding for narration, and it is enforceable to be not used to restriction the utility model
Scope, being altered or modified for its relativeness is enforceable when being also considered as the utility model under without essence change technology contents
Category.
Referring to Fig. 2, the utility model provides a kind of density calibration system construction drawing of mass flowmenter, including：
Volumetric solution device 1, it is used to provide a variety of density different volumetric solutions；Solution pump 3, it is used to provide power
Volumetric solution is flowed in calibration pipeline with certain pressure；Standard scale 4 and multiple mass flowmenters 5 to be measured are along the solution
The output end of pump 3 is uniformly installed in the calibration pipeline；The standard scale 4 is used for for the density of volumetric solution in calibration pipeline；
Computer 6, it connects multiple mass flowmenters 5 to be measured, standard scale 4 and switch 3 respectively；It is used to control the switch 3 to cut
The volumetric solution for changing different medium demarcates the density of the mass flowmenter 5, according to density calibration Mathematical Modeling by the close of calculating
Spend calibration coefficient and write corresponding mass flowmenter 5.
Wherein, the computer 6 can be replaced industrial computer or terminal, and volumetric solution device 1 can be multiple, each demarcate molten
Liquid device 1 fills Media density identical volumetric solution；And volumetric solution device 1, solution pump 3, standard scale 4, mass flowmenter 5
Between be connected with each other using calibration pipeline；And the calibration pipeline between the output end and solution pump 3 of each volumetric solution device 1
On be respectively provided with a switch 2, the calibration pipeline of the input of each volumetric solution device 1 connection and be respectively provided with a switch 2,
Switch 2 described herein ensures only have a kind of medium volumetric solution calibration pipeline in density calibration system to flow every time.
The switch for controlling volumetric solution to flow is provided between the solution pump 3 and standard scale 4, and is set here
Corresponding pass, which opens 2, can ensure that solution pump 3 is flowed volumetric solution in standard scale 4 by its own power, meanwhile, in switch closure
When, solution pump, which is ceaselessly operated, can squeeze the air bubble having in calibration pipeline, wherein, it is described switch 2 be valve, gate with
Magnetic valve, preferably magnetic valve, can directly be controlled by computer 6, the mark of different medium is switched in by the remote control of computer 6
Determine solution, repeatedly measured under every kind of volumetric solution completely without artificially participate in the density of mass flowmenter 5, calibration process,
The density of mass flowmenter 5 to be measured is calculated by density calibration Mathematical Modeling, has not only prevented the mark of traditional quality volumetric manner
Determine error, the precision of the density calibration of mass flowmenter 5 is also greatly improved.
, can be in the solution pump 3 and close if required to the pressure of volumetric solution in density calibration system with flow velocity
The constant pressure and flow tank for constant current constant voltage is provided between the switch 2 of standard scale 4, by opening the exhaust on constant pressure and flow tank arrangement
Switch, until the volumetric solution that solution pump 3 is supplied is full of constant pressure and flow tank to greatest extent, then closes air discharge cook, its purpose
It is to eliminate in volumetric solution to have the state of air bubble and the non-constant pressure and flow of volumetric solution, if to set constant pressure and constant here
Flow tank, its must controlling bus connection computer, to realize the purpose of Automated condtrol.
In this application, the computer 6 is used with multiple mass flowmenters 5 to be measured, standard scale 4 and switch 2 and controlled
Bus communication processed, the open and close for instructing controlling switch 2, collection standard scale 4 and mass flowmenter 5 are sent by computer
Data, each density value of mass flowmenter 5 to be measured and precision are calculated according to density calibration Mathematical Modeling.Wherein, quality to be measured
The number of flowmeter 5 is up to ten, can only at most demarcate three simultaneously compared to original, improve the efficiency of demarcation.
In the application, density calibration Mathematical Modeling is as follows：
In formula (1), ρ：The density of mass flowmeter calibration metered media solution, units/kg/M3；Kd：Calibrated and calculated output
Bulkfactor, dimensionless；Fe(25)：The resonant frequency of mass flow meter sensor measurement pipe at a temperature of 25 DEG C of constant temperature, unit
Hz；Fkt：The whole machine material of mass flow meter sensor, the structure correction factor related to temperature, are usually often to raise or reduce by 1
DEG C, the variable quantity of sensor measuring tube resonant frequency；T：Mass flow meter sensor temperature；Fr：Mass flow meter sensor is surveyed
Measure actual output frequency during pipe full metered media solution, unit Hz；Calculating KdIn the case of, according to the F of readingr
Calculate the density of the medium solution of mass flowmeter calibration.
Also include fixed frame, it, which is arranged at the mass flowmenter 5 and the both sides of standard scale 4, is used to support its work,
The fixed frame is preferably cement support, and density calibration mass flowmenter instrument is treated in its vibration that can not only eliminate pipeline
Influence, can also eliminate the influence to density calibration because of the sensor itself s mechanical vibration of mass flowmenter 5.Meanwhile, the fixation machine
Frame is also to treat to play a part of isolation between density calibration overall mass flowmeter 5 online, prevent from treating the quality of density calibration
Influencing each other between flowmeter 5.
As shown in figure 3, a kind of example structure of the density calibration system of the mass flowmenter provided for the utility model
Figure；Including：
In the present embodiment, the number of the mass flowmenter 5 for treating density calibration is ten, standard scale 4 and ten matter
Amount flowmeter 5 is respectively arranged in calibration pipeline along the order of the outbound course of solution pump 3 from left to right, the mass flowmenter
5 are used for the fixed frame that supports its work with the both sides of standard scale 4.1 point of medium solution device fills different Jie respectively for five
The volumetric solution of matter, wherein, corresponded to respectively in the calibration pipeline of the output end of the first to the 5th medium solution device 1 and install first
Corresponded to respectively to the 5th magnetic valve, in the calibration pipeline of the input of the first to the 5th medium solution device 1 and install the 6th to the
Ten magnetic valves, the calibration pipeline for mass flowmenter 5 (i.e. the mass flowmenter 5 of the rightmost) output that numbering is the tenth is connected respectively
To the input of each medium solution device 1, make it that the volumetric solution of every kind of medium can be weighed after calibration pipeline interior circulation
Newly the magnetic valve of medium solution device the 1, the 11st is returned to be installed in the calibration pipeline between solution pump 3 and standard scale 4.
The computer 6 connects standard scale 4, multiple mass flowmenters 5 and multiple electromagnetism respectively by controlling bus mode
Valve, switches the volumetric solution of every kind of medium, for example, when the 11st magnetic valve is opened, it is necessary to contain by controlling electromagnetic valve switch
The medium solution device 1 for having the volumetric solution of certain medium opens its magnetic valve, closes other magnetic valves so that this kind of medium
Volumetric solution flow to whole density calibration system, when the volumetric solution of this kind of medium is in calibration pipeline bubble-free and in static
During state, the output frequency of mass flowmenter to be measured is successively read；Each is calculated by density calibration Mathematical Modeling to be measured
The bulkfactor of mass flowmenter, then, repeats the above steps, you can in the case of obtaining one or more medium solutions, each
The density of mass flowmenter 5 to be measured, the essence of corresponding mass flowmenter is calculated according to the density of mass flowmenter 5 to be measured
Degree.
In the present embodiment, according to the density calibration method of above-mentioned mass flowmenter, including：
Step 1, density calibration system is initialized, it is ensured that mass flowmenter to be measured tends to be steady state；
Specifically, density calibration system is in initialization procedure, and all switches of computer controls are in closed mode, will
Mass flowmenter to be measured is installed in calibration pipeline, it is ensured that mass flowmenter is in sealing state, i.e. No leakage；Standard scale with
Mass flowmenter is both powered up, and computer connects quasi- table, mass flowmenter and magnetic valve by bus marco；For example, general use
It is delayed a few minutes so that treat the mass flowmenter of density calibration in the empty pipe condition of calibration pipeline or the work shape tended to be steady
State.
Step 2, it is in mass flowmenter under empty pipe condition, is successively read the frequency of mass flowmenter output to be measured
Value；
Step 3, the switch and the switch close to standard scale of certain medium volumetric solution device are opened so that this kind of medium
Volumetric solution circulated in calibration pipeline, until the volumetric solution bubble-free flowed in mass flowmenter to be measured is
Only；
Step 4, the switch and the switch close to standard scale of the volumetric solution device are closed, until being demarcated in calibration pipeline
Untill solution remains static；
Step 5, the current density value of standard scale is read, and is successively read the frequency values of mass flowmenter output to be measured；
Step 6, under the volumetric solution of different medium, repeat step 3 to 5, obtain standard scale density value with it is to be measured
The frequency values of mass flowmenter output；
Step 7, call density calibration Mathematical Modeling to calculate the bulkfactor of each mass flowmenter to be measured successively, write
Enter to correspondence mass flowmenter to be measured；
Step 8, under every kind of medium volumetric solution, step 3 is repeated several times to 4, the mark of the multiple demarcation of standard scale is obtained
Quasi- density value, and the density value that mass flowmenter to be measured is repeatedly exported；
Step 9, the density exported according to standard density value corresponding under medium volumetric solution with mass flowmenter
Value calculates the precision of mass flowmenter.
In the present embodiment, the expansion of above method flow be can obtain into following flow, details are as follows：
1. opening mass flowmenter density calibration systems soft ware in industrial computer (computer), close in a whole set of calibration system
All electromagnetic valves；
2. the mass flowmenter instrument of density calibration will be treated according to (along the outbound course of solution pump, that is, leaning on from front to back
Before the distance of nearly solution pump is, the distance away from solution pump is rear) sequentially it is installed on calibration pipeline, it is ensured that No leakage state；
3. power-up initializing treats the mass flow and standard scale of density calibration, the bus communication of communication bus and industrial computer connects
Mouth is connected；
4. the mass flow of density calibration and the communication detection of standard scale are treated in progress, it is ensured that each online mass flow
With standard scale with the mass flowmenter density calibration systems soft ware normal communication in industrial computer；
5. triggering mass flowmenter density calibration system in industrial computer, start the density calibration stream of online mass flowmenter
Journey；
6. delay 3 minutes or so, makes to treat that the mass flow of density calibration is in the state of blank pipe or tends to be flat online
Steady working condition；
7. according to number order from front to back, collection successively carries out treating the mass flow of density calibration in blank pipe online
State lower frequency data；
8. the first magnetic valve, the 6th magnetic valve and the 11st magnetic valve in calibration pipeline are opened by controlling bus, its
Its magnetic valve is closed；
9. under the driving of solution pump, the medium solution in first medium solution containment flow through calibration pipeline, standard scale,
Line treats the mass flowmenter of density calibration, is flowed back to after circulation further through calibration pipeline in first medium solution containment, in the state
Or so delay working several (five) minutes, treat until whole calibration pipeline and online in the measurement pipe of mass flowmenter of density calibration
It is full of and bubble free state by the medium solution in first medium solution containment completely；
10. the first magnetic valve, the 6th magnetic valve and the 11st magnetic valve closed by controlling bus in calibration pipeline, directly
Density calibration medium solution is in calmness and without flow regime in whole calibration pipeline, e.g., can reach within 1 minute using delay flat
It is quiet and without flow regime；
11. read the standard density value that currently exports of standard scale by bus, in order of numbers be successively read treat online it is close
The fixed mass flow of scale output frequency value in this condition；
12. repeat step 8) -11), complete the density calibration flow of medium solution in the second to the 5th medium solution device；
The unique difference i.e. magnetic valve of control is different, specific as follows：
The density calibration of second medium solution containment needs the second magnetic valve, the 7th magnetic valve, the 11st electromagnetism controlled
Valve；
The density calibration of 3rd medium solution device needs the 3rd magnetic valve, the 8th magnetic valve, the 11st electromagnetism controlled
Valve；
The density calibration of 4th medium solution device needs the 4th magnetic valve, the 9th magnetic valve, the 11st electromagnetism controlled
Valve；
The density calibration of 5th medium solution device needs the 5th magnetic valve, the tenth magnetic valve, the 11st electromagnetism controlled
Valve；
13. according to the density calibration Mathematical Modeling of enclosed inside, calculate each mass flowmenter successively in sequence
Bulkfactor, is written to what bulkfactor was corresponding in turn in online mass flowmenter converter；
14. repeat the density output accuracy that detection calculates online mass flowmenter；
15. the first magnetic valve, the 6th magnetic valve and the 11st magnetic valve in calibration pipeline are opened by controlling bus, its
Its magnetic valve is closed；
16. under the driving of solution pump, the medium solution in first medium solution containment flow through calibration pipeline, standard scale,
The online mass flowmenter for treating density calibration, is flowed back in first medium solution containment after circulation further through calibration pipeline, in the shape
Or so state delay working several (five) minutes, until whole calibration pipeline and the measurement pipe of the online mass flowmenter for treating density calibration
In be full of and bubble free state by the medium solution in first medium solution containment completely；
17. the first magnetic valve, the 6th magnetic valve and the 11st magnetic valve closed by controlling bus in calibration pipeline, directly
Density calibration medium solution is in calmness and without flow regime in whole calibration pipeline, e.g., can reach within 1 minute using delay flat
It is quiet and without flow regime；
18. reading the standard density value that standard scale is now exported by bus, it is successively read treats density online from front to back
The density value that the mass flow of demarcation is exported in this condition, and calculate the precision of mass flowmenter；
19. repeat step 15) -18), medium solution density in first medium solution containment is detected for the second time；
20. mass flowmenter density calibration systems soft ware repeat step 15) -18), third time detection first medium solution dress
Middle medium solution density is put, the repeatability of online mass flowmenter density output is calculated successively；
21. repeat step 15) -20), complete the output of medium solution density and repetition in the second to the 5th medium solution device
The calibrating of property；
22. the report production online mass flowmenter density calibration of user and testing result (precision and repeatability).
In summary, the utility model is by the way that original manually-operated density calibration system replacement is controlled automatically for computer
The density calibration system of system, demarcates quantity by three relative to original density calibration system and becomes ten, improve production every time
The efficiency of the demarcation of product；The volumetric solution of different medium is switched in using computer operated switch, it is many under every kind of volumetric solution
Completely without artificially participating in the density of secondary measurement mass flowmenter, calibration process, calculated and treated by density calibration Mathematical Modeling
The density of mass metering flowmeter, has not only prevented the calibrated error of traditional quality volumetric manner, quality stream has also been greatly improved
The precision of gauge density calibration；Meanwhile, constant pressure and flow tank is introduced in density calibration system, is eliminated because solution pump is in work
When produced volumetric solution trickle and air bubble the problem of, inherently improve the stated accuracy of mass flowmenter.So,
The utility model effectively overcomes various shortcoming of the prior art and has high industrial utilization.
Above-described embodiment only illustrative principle of the present utility model and its effect are new not for this practicality is limited
Type.Any person skilled in the art can all be carried out without prejudice under spirit and scope of the present utility model to above-described embodiment
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the essence disclosed in the utility model
God and all equivalent modifications completed under technological thought or change, should be covered by claim of the present utility model.
Claims (8)
1. a kind of density calibration system of mass flowmenter, it is characterised in that including：
Volumetric solution device, it is used to provide a variety of density different volumetric solutions；
Solution pump, it, which is used to providing power, flows volumetric solution in calibration pipeline with certain pressure；
Standard scale is uniformly installed in the calibration pipeline with multiple mass flowmenters to be measured along the solution pump output terminal；
The standard scale is used for for the density of volumetric solution in calibration pipeline；
Computer, it connects multiple mass flowmenters to be measured, standard scale and switch respectively；It is used to control the switch switching
The volumetric solution of different medium demarcates the density of the mass flowmenter, according to density calibration Mathematical Modeling by the density mark of calculating
Determine coefficient and write corresponding mass flowmenter.
2. the density calibration system of mass flowmenter according to claim 1, it is characterised in that the volumetric solution device
To be multiple, each volumetric solution device fills the volumetric solution of same density, the output end of each volumetric solution device with it is molten
It is respectively provided with a switch, the calibration pipeline of the input connection of each volumetric solution device and is all provided with calibration pipeline between liquid pump
Put a switch.
3. the density calibration system of mass flowmenter according to claim 1, it is characterised in that the solution pump and standard
The switch for controlling volumetric solution to flow is provided between table.
4. the density calibration system of the mass flowmenter according to Claims 2 or 3, it is characterised in that the switch is electricity
Magnet valve.
5. the density calibration system of mass flowmenter according to claim 1, it is characterised in that the solution pump and close
The constant pressure and flow tank for constant current constant voltage is provided between the switch of standard scale.
6. the density calibration system of mass flowmenter according to claim 1, it is characterised in that the computer with it is to be measured
Mass flowmenter, standard scale and switch using controlling bus communicate.
7. the density calibration system of mass flowmenter according to claim 1, it is characterised in that also including fixed frame,
It, which is arranged at the mass flowmenter and the both sides of standard scale, is used to support its work.
8. the density calibration system of mass flowmenter according to claim 1, it is characterised in that the quality stream to be measured
The number of gauge is up to ten.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621260926.5U CN206321315U (en) | 2016-11-22 | 2016-11-22 | The density calibration system of mass flowmenter |
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| CN201621260926.5U CN206321315U (en) | 2016-11-22 | 2016-11-22 | The density calibration system of mass flowmenter |
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| CN201621260926.5U Active CN206321315U (en) | 2016-11-22 | 2016-11-22 | The density calibration system of mass flowmenter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643989A (en) * | 2016-11-22 | 2017-05-10 | 重庆川仪自动化股份有限公司 | Density calibration system and method for mass flow meter |
| CN108088730A (en) * | 2017-12-21 | 2018-05-29 | 浙江华友钴业股份有限公司 | A kind of accurate dosing method of ternary precursor metal salt solution |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643989A (en) * | 2016-11-22 | 2017-05-10 | 重庆川仪自动化股份有限公司 | Density calibration system and method for mass flow meter |
| CN108088730A (en) * | 2017-12-21 | 2018-05-29 | 浙江华友钴业股份有限公司 | A kind of accurate dosing method of ternary precursor metal salt solution |
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