CN106323426B - Continuous cast mold on-line argon-blow flow measurement accuracy of measurement bearing calibration - Google Patents
Continuous cast mold on-line argon-blow flow measurement accuracy of measurement bearing calibration Download PDFInfo
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Abstract
The present invention relates to a kind of continuous cast mold on-line argon-blow flow measurement accuracy of measurement means for correctings, it is characterized in that, the means for correcting includes cabinet, handle is provided on the cabinet, box house is provided with regulated power supply (6) and mass flow regulating valve (1) mass flowmenter (7), it is provided with the electronic display (4) of flow indication when measurement on cabinet, the external pipeline (3) for accessing argon gas is provided in the cabinet.
Description
Technical field
The present invention relates to a kind of means for correctings, and in particular to a kind of continuous cast mold on-line argon-blow flow measurement accuracy of measurement school
Equipment and bearing calibration belong to continuous casting control technology field.
Background technique
In existing continuous casting working procedure, crystallizer is the most critical that continuous casting working procedure is converted into the molten steel that converter provides slab
Equipment.Molten steel is injected into crystallization by the submersed nozzle of tundish bottom by the shunting of Metal in Tundish by continuous casting working procedure
It is cooling by the water flowing of copper plate of crystallizer in device, form certain shell thickness, the slab of internal wick-containing.Slab passes through runner
Secondary cooling molding after pull out, to complete entire continuous casting production process.And crystallizer Argon technology is current domestic and international steel
The technology that factory generallys use.By the Argon to tundish to each position of crystallizer, can effectively completely cut off hollow in continuous casting process
Secondary oxidation of the gas to molten steel.Simultaneously argon gas be uniformly precipitated again in crystallizer can improve well flow field in crystallizer and
Promote the thawing and spreadability of covering slag in crystallizer.At present from Metal in Tundish to crystallizer in, generally all blown using stopper
Argon (or slide plate Argon), the multichannels argon gas such as filling pipe end Argon, argon gas-sealed.What is generallyd use at present is the argon gas of an entirety
Control cabinet completes the control of each Argon Gas Loop by components such as internal pressure adjusting, flow adjustings.But it is if a large amount of
Argon gas be blown into crystallizer, the unstable of molten steel flow field in crystallizer certainly will be will cause.Molten steel flow field it is unstable
Slab crack defect, the dreg defect produced can be directly resulted in.Therefore control crystallizer is all generally taken both at home and abroad at present
The amount of being blown into of argon gas reduces such slab defect.As certain steel mill, the country requires the amount of being blown into of single channel argon gas no more than 5L/
Min, the argon flow fluctuation that single is adjusted is no more than 0.5L/min, if single argon blowing rate branch is opened, display stream
Amount is 4.5L/min, and flow of the actual flow then than this display is much larger or much smaller, certainly will will lead to scene in this way
The failure of Argon control.The excessive dreg defect that will cause slab of actual flow, actual flow is too small then again cannot be good
Improve the flow field in crystallizer.It is therefore seen that the importance of the flowmeter accuracy in argon gas control cabinet.Continuous casting scene is one
The production scene of a high temperature, dust is certain to change using the measurement accuracy of rear flowmeter for a long time, the change of measurement accuracy
Changing practical is exactly that actual flow and display flow are inconsistent, just needs to carry out calibration correction to the precision of flowmeter at this time.Also
It is to say to make the actual flow of flowmeter consistent with display flow.But argon flow meter belongs to high-accuracy metering outfit, general work
Factory does not have the self-calibration condition and qualification of flowmeter.The department that profession is sent to after must disassembling is demarcated.And
As soon as continuous casting is a continuous production process, needing to dismantle every time for proving flowmeter to send to demarcate seems complicated and cumbersome,
It is tangible unrealistic that calibration is sent to repeatedly.But if precision calibration without flowmeter, the inaccuracy of flow can also be led
Cause the passive of continuous casting manufacturing technique control.Therefore, there is an urgent need for a kind of devices to solve above-mentioned technical problem.
Summary of the invention
The present invention exactly for the technical problems in the prior art, provides a kind of continuous cast mold on-line argon-blow flow
Accuracy of measurement means for correcting is measured, the electronic flowmeter and online electronic flowmeter in the device belong to same model, and are
By the detection of professional accreditation department periodic calibrating, measurement accuracy complies fully with live requirement.Timing uses correction
Device connects online argon-blowing device, and online argon-blowing device is recorded under same argon flow and shows flow value and present invention correction dress
It sets flowmeter and shows flow value, the two groups of data measured according to on-line argon-blow device and means for correcting of the present invention calculate outlet
Sexual intercourse KXAnd deviation value P0.Increase flowmeter display precision calibration function on existing argon gas control cabinet, in same output stream
Under amount, realize that the flowmeter flow indication on on-line correction device is consistent with the flowmeter flow indication on on-line argon-blow device,
Since the flowmeter on on-line correction device is periodic calibrating and detection, so if the two are flowed under the output of same flow
Meter shows that flow is consistent, can complete online quickly to the accuracy correction of the problematic flowmeter on argon gas control cabinet.
To achieve the goals above, technical scheme is as follows, a kind of continuous cast mold on-line argon-blow flow measurement
Accuracy of measurement means for correcting, which is characterized in that the means for correcting includes cabinet, and handle, box house are provided on the cabinet
It is provided with regulated power supply and mass flow regulating valve mass flowmenter, the electronics of flow indication when measurement is provided on cabinet
Display screen is provided with the external pipeline for accessing argon gas in the cabinet.
The bearing calibration of continuous cast mold on-line argon-blow flow measurement accuracy of measurement means for correcting, which is characterized in that the side
Method is as follows,
A kind of continuous cast mold on-line argon-blow flow measurement accuracy of measurement means for correcting, which is characterized in that the means for correcting
Including cabinet, handle is provided on the cabinet, box house is provided with regulated power supply and mass flow regulating valve mass flow
It counts, the electronic display of flow indication when measurement is provided on cabinet, is provided in the cabinet for accessing argon gas
External pipeline.
The bearing calibration of continuous cast mold on-line argon-blow flow measurement accuracy of measurement means for correcting, which is characterized in that the side
Method is as follows,
1) it, chooses and the mass flowmenter and mass flow of the same model of argon gas measuring device and measurement accuracy is adjusted online
Valve,
11), installation configures mobile on-line correction device, and in a pre-installation to the flowmeter in the means for correcting by country
Professional detection department carries out profession calibration detection；
12), Mobile Online's means for correcting external power supply, its external pipeline is linked into online needs and measures correction
On one of output pipe of argon-blowing device；
13) pipe valve of on-line argon-blow device, is opened, point different argon flow of 10 to 15 adjustings, and remember respectively
Record on-line argon-blow device and the respective flow indication value of movable type on-line correction device；
2) data processing, is carried out, mathematical regression equation calculation is utilized.It is located at that measured come out of line shift calibrating device
Group data are Y, and measured that group of numerical value recorded of on-line argon-blow device is X, establish regression equation Yi=a+bX, determines a and returns
Return coefficient b.Regression straight line asks method using least square method, it is determined that a and regression coefficient b has exactly been determined corresponding online
The linear relationship K of argon-blowing device flowmeter and the movable type on-line correction device flowmeterXAnd deviation value P0；
21), line argon-blowing device flowmeter is located at if the flow value of means for correcting is Y for the argon flow of every primary Ioops
Value be X；
22), each according to the on-line argon-blow device of record measured by front 10 to 15 times and the movable type on-line correction device
From flow indication value each group of data.Being located at measured that group of data come out of line shift calibrating device is Y, on-line argon-blow dress
Setting that group of measured numerical value is X, establishes regression equation Yi=a+bX determines a and regression coefficient b.Regression straight line asks method to adopt
With least square method, it is determined that a and regression coefficient b has exactly determined corresponding on-line argon-blow device flowmeter and the movable type
The linear relationship K of on-line correction device flowmeterXAnd deviation value P0；Its least square method formula is as follows:
Find out linear relationship KXAnd deviation value P0；
3) increase calibration function on on-line argon-blow device, utilize linear relationship KXAnd deviation value P0To the stream of on-line equipment
Meter display precision carries out on-line correction；
31), increase the linear relationship K of each output pipe on on-line argon-blow deviceXAnd deviation value P0Input pair
Talk about frame and calibrating function button；
32), wherein branch setting flow value is decomposed into " display flow/Kx+Po " on on-line argon-blow device, for controlling
Mass flow regulating valve valve opening；With " actual flow * Kx-Po " calculated value as the flow on on-line argon-blow device
Display；
33) it, adopts under same output flow, acquisition on-line argon-blow device flowmeter of improving quality shows flow value A and online school
Equipment is improved quality the flow value B that flowmeter is shown；
34) after, collecting demarcation signal, allow the mass flow regulating valve on mobile on-line correction device by adjusting valve
Door aperture is adjusted to A by B；
35) " display flow/Kx+Po " i.e. A/Kx+Po, is utilized to calculate and should actually use at this time on on-line argon-blow device
Actual flow value, if the value be C；
36) C value, is fed back to on-line argon-blow device mass flow regulating valve again, which will as target value using C value
Readjust valve opening；
37), allow " actual flow * Kx-Po " calculated value as the flow indication on on-line argon-blow device；That is " C*
The value of Kx-Po " is shown on on-line argon-blow flowmeter display table；
38) this on-line correction function, is completed.
Compared with the existing technology, the invention has the advantages that, 1) the technical solution whole design is ingenious, compact-sized,
Realize continuous cast mold argon blowing rate measurement accuracy of measurement on-line correction, due to eliminate each mass flowmenter carry out disassembly and
The step of special inspection, improves the service life of mass flowmenter well, after plum steel steel mill uses the device, crystallization
All realize " 0 " failure within the moon rate of breakdown of device argon blowing rate meter continuous 5 months.2) working time is saved, it is ensured that even
Cast the accuracy guarantee of online crystallizer Argon；After plum steel steel mill uses the device, the single Argon management of on-line argon-blow device
Control precision, which can control, is less than ± 0.05L/min in fluctuation.Due to the raising of Argon control precision, made since Argon is unstable
At slab bubble, dreg defect incidence also falls below 0.6% or less by 0.78% before using.3) technical solution is realized
Online quickly to the accuracy correction of problematic flowmeter on argon gas control cabinet, work efficiency is high, and it is annual regularly right to eliminate
The tedious steps demarcated are sent in each mass flowmenter disassembly；4) cost is relatively low for the technical solution, convenient for pushing away on a large scale
Wide application.
Detailed description of the invention
Fig. 1 is means for correcting schematic diagram of the present invention；
Fig. 2 is using state structure diagram of the present invention；
In figure: 1, mass flow regulating valve, 2, cabinet, 3, external pipeline, 4, electronic display, 5, handle, 6, pressure stabilizing electricity
Source, 7, mass flowmenter, 8, means for correcting, 9, online argon gas tube outlet, 10, the mass flowmenter in line loop, 11, In
Line argon-blowing device display screen.
Specific embodiment:
In order to deepen the understanding of the present invention, the present invention is further explained in the following with reference to the drawings and specific embodiments
It is bright.
Embodiment 1: live argon gas control cabinet feels there is exception, or does not correct for a long time, right on technologists
There is certain suspection in current flow indication authenticity.It is solved using the present invention as follows:
1), the electronic flowmeter of selection and online argon gas measuring device same model and measurement accuracy is passing through profession portion
Door is assembled after carrying out calibration detection according to Fig. 1；The means for correcting includes cabinet, and handle, case are provided on the cabinet
Body is internally provided with regulated power supply (6) and mass flow regulating valve (1) mass flowmenter (7), when being provided with measurement on cabinet
The electronic display (4) of flow indication is provided with the external pipeline (3) for accessing argon gas in the cabinet.
11) mobile on-line correction device, is configured according to installation shown in Fig. 1, and in a pre-installation in the means for correcting
Flowmeter carries out profession calibration detection；
12), Mobile Online's means for correcting external power supply, schematic diagram is used according to Fig. 2, its external pipeline is accessed
Onto the online one of output pipe of argon-blowing device for needing to measure correction；
13) on-line argon-blow device pipe valve, is opened, different argon flows is respectively adjusted to, according to process requirements
The amplitude of accommodation adjust different flows, be separately recorded in line argon-blowing device and the mobile on-line correction device of the present invention be respective
Flow indication value；
2) data processing, is carried out, on-line argon-blow device flowmeter and the mobile on-line correction device flow of the present invention are found out
The linear relationship K of meterXAnd deviation value P0；Being located at measured that group of data come out of line shift calibrating device is Y, on-line argon-blow dress
Setting that group of measured numerical value is X, establishes regression equation Yi=a+bX determines a and regression coefficient b.Regression straight line asks method to adopt
With least square method, it is determined that a and regression coefficient b has exactly determined corresponding on-line argon-blow device flowmeter and the movable type
The linear relationship K of on-line correction device flowmeterXAnd deviation value P0；
21), line argon-blowing device flowmeter is located at if the flow value of means for correcting is Y for the argon flow of every primary Ioops
Value be X；
22), according to multi-group data measured by front, regression equation Y is establishedi=a+bX determines a and regression coefficient b.It returns
That returns straight line asks method using least square method, determines that a value is 0.8 and regression coefficient b value is 0.9 (see the table below), that is, corresponding
The linear relationship K of on-line argon-blow device flowmeter He the movable type on-line correction device flowmeter has been determinedXAnd deviation value P0；It looks for
Linear relationship K outXIt is 0.9, deviation value P0It is 0.8.Its least square method formula is as follows:
3), increase calibration function on on-line argon-blow device, utilize linear relationship KX(0.9) and deviation value P0(0.8) to
The flowmeter display precision of line apparatus carries out on-line correction；
31), on on-line argon-blow device each output pipe linear relationship KXAnd deviation value P0Input dialogue frame
Middle input linear relationship K respectivelyX(0.9) and deviation value P0(0.8) and input is determined；
32), the argon flow on on-line argon-blow device is adjusted to one and is worth, under same output flow, at this time online
Argon-blowing device electronic flowmeter show value is 10L/min (A value), and corresponding on-line correction device electronic flowmeter show value is
9.8L/min (B value)；
33) calibrating procedure, is activated on on-line argon-blow device, after collecting demarcation signal, system is by mobile online school
Flow value on equipment allows its flow to be adjusted to 10L/min by 9.8L/min by adjusting valve opening；B value is adjusted to
A value
34) " display flow/Kx+Po " i.e. A/Kx+Po, is utilized to calculate and should actually use at this time on on-line argon-blow device
Actual flow value, if the value is C, then C=10/0.9+0.8=11.91；
35), flow valve aperture is readjusted according to actual set flow value " 11.91 " on on-line argon-blow device；
36), allow " actual flow * Kx-Po " calculated value as the flow indication on on-line argon-blow device；That is " C*
The value of Kx-Po " is shown on on-line argon-blow flowmeter display table；Then show value should are as follows:
11.91*0.9-0.8=9.9 (is approximately equal to 10)." 9.9 " calculated are shown in on-line argon-blow flowmeter and show
On table；
37), at this time under same flow, on-line measurement device electronic flowmeter and moving correcting device electronic flowmeter
Shown value is each about 10L/min；
38) this on-line correction function is completed；
It should be noted that above-described embodiment, is not intended to limit the scope of protection of the present invention, in above-mentioned technical proposal
On the basis of made equivalents or substitution each fall within the range that the claims in the present invention are protected.
Claims (1)
1. the bearing calibration of continuous cast mold on-line argon-blow flow measurement accuracy of measurement means for correcting, which is characterized in that wherein correct
Device includes cabinet, and handle is provided on the cabinet, and box house is provided with regulated power supply (6) and mass flow regulating valve
(1), mass flowmenter (7) are provided with the electronic display (4) of flow indication when measurement on cabinet, set in the cabinet
It is equipped with the external pipeline (3) for accessing argon gas；
The method is as follows,
1), the mass flowmenter and mass flow regulating valve of selection and the same model of on-line argon-blow device and measurement accuracy,
11), installation configuration means for correcting, and in a pre-installation to the mass flowmenter (7) in the means for correcting by national profession inspection
Survey department carries out profession calibration detection；
12), Mobile Online's means for correcting external power supply, its external pipeline is linked into online needs and measures the online of correction
On one of output pipe of argon-blowing device；
13) pipe valve of on-line argon-blow device, is opened, point different argon flow of 10 to 15 adjustings, and be separately recorded in
Line argon-blowing device and the respective flow indication value of movable type on-line correction device；
2) data processing, is carried out, using mathematical regression equation calculation, is located at measured that group of number come out of line shift calibrating device
According to for Y, measured that group of numerical value recorded of on-line argon-blow device is X, establishes regression equation Yi=a+bX determines a and returns system
Number b, regression straight line ask method using least square method, it is determined that a and regression coefficient b has exactly determined corresponding on-line argon-blow
The linear relationship K of device and the movable type on-line correction device flowmeterXAnd deviation value P0；
21), for the argon flow of each output pipe, if the flow value of means for correcting is Y, the value for being located at line argon-blowing device is
X；
22), respective according to the on-line argon-blow device of record measured by front 10 to 15 times and the movable type on-line correction device
The each group of data of flow indication value, being located at measured that group of data come out of line shift calibrating device is Y, on-line argon-blow device institute
That group of numerical value of measurement is X, establishes regression equation Yi=a+bX determines that a and regression coefficient b, regression straight line ask method using most
Small square law, it is determined that a and regression coefficient b has exactly determined corresponding on-line argon-blow device and movable type on-line correction dress
Set the linear relationship K of flowmeterXAnd deviation value P0；
Its least square method formula is as follows:
Find out linear relationship KXAnd deviation value P0；
3) increase calibration function on on-line argon-blow device, utilize linear relationship KXAnd deviation value P0To the flowmeter of on-line equipment
Display precision carries out on-line correction；
31), increase the linear relationship K of each output pipe on on-line argon-blow deviceXAnd deviation value P0Input dialogue frame
With calibrating function button；
32), wherein output pipe setting flow value is decomposed into " display flow/Kx+Po " on on-line argon-blow device, for controlling
Mass flow regulating valve valve opening；With " actual flow * Kx-Po " calculated value as the flow on on-line argon-blow device
Display；
33), under same output flow, acquisition on-line argon-blow device improve quality flowmeter show flow value A and on-line correction dress
Set the flow value B that flowmeter of improving quality is shown；
34) after, collecting demarcation signal, the mass flow regulating valve on mobile on-line correction device is allowed to open by adjusting valve
Degree is adjusted to A by B；
35) " display flow/Kx+Po " i.e. A/Kx+Po, is utilized to calculate the reality that should actually use at this time on on-line argon-blow device
Border flow value, if the value is C；
36) C value, is fed back to on-line argon-blow device mass flow regulating valve again, which will be again as target value using C value
Controlling opening of valve；
37), allow " actual flow * Kx-Po " calculated value as the flow indication on on-line argon-blow device；That is " C*Kx-
The value of Po " is shown on on-line argon-blow flowmeter display table；
38) this on-line correction function, is completed.
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| CN201510371733.0A CN106323426B (en) | 2015-06-30 | 2015-06-30 | Continuous cast mold on-line argon-blow flow measurement accuracy of measurement bearing calibration |
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| JP6940441B2 (en) * | 2018-03-27 | 2021-09-29 | アズビル株式会社 | Thermal flow sensor device and flow rate correction method |
| CN111693107B (en) * | 2019-03-12 | 2022-08-12 | 上海梅山钢铁股份有限公司 | Multifunctional probe combination device of power bar flowmeter |
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| CN102680059A (en) * | 2012-05-24 | 2012-09-19 | 哈尔滨电机厂有限责任公司 | Method for reducing small-flow calibration error of test bed flow meter of hydraulic machine model |
| CN103759793A (en) * | 2013-12-31 | 2014-04-30 | 广西玉柴机器股份有限公司 | Calibration device and method for gas flow meter |
| CN203758587U (en) * | 2014-03-31 | 2014-08-06 | 新疆维吾尔自治区计量测试研究院 | Calibrating device for small-flow gas flow meter |
| CN104249140A (en) * | 2013-06-26 | 2014-12-31 | 宝山钢铁股份有限公司 | Argon blowing integration system of continuous casting crystallizer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10126761B2 (en) * | 2015-12-29 | 2018-11-13 | Hitachi Metals, Ltd. | Gas insensitive mass flow control systems and methods |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680059A (en) * | 2012-05-24 | 2012-09-19 | 哈尔滨电机厂有限责任公司 | Method for reducing small-flow calibration error of test bed flow meter of hydraulic machine model |
| CN104249140A (en) * | 2013-06-26 | 2014-12-31 | 宝山钢铁股份有限公司 | Argon blowing integration system of continuous casting crystallizer |
| CN103759793A (en) * | 2013-12-31 | 2014-04-30 | 广西玉柴机器股份有限公司 | Calibration device and method for gas flow meter |
| CN203758587U (en) * | 2014-03-31 | 2014-08-06 | 新疆维吾尔自治区计量测试研究院 | Calibrating device for small-flow gas flow meter |
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