CN102021259A - Pressure correction electronic scale for furnace top burdening system of blast furnace - Google Patents
Pressure correction electronic scale for furnace top burdening system of blast furnace Download PDFInfo
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- CN102021259A CN102021259A CN2009103075333A CN200910307533A CN102021259A CN 102021259 A CN102021259 A CN 102021259A CN 2009103075333 A CN2009103075333 A CN 2009103075333A CN 200910307533 A CN200910307533 A CN 200910307533A CN 102021259 A CN102021259 A CN 102021259A
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Abstract
The invention relates to a pressure correction electronic scale for a furnace top burdening system of a blast furnace. A signal output end of a weighing sensor is connected with a weight transmitter; a signal output end of the weight transmitter is connected with a pressure correction controller; an air pressure sensor is arranged in a charging bucket; a signal output end of the air pressure sensor is connected with the pressure correction controller by a pressure transmitter; and signal input ends of a pressurizing valve and a relief valve are respectively connected with the pressure correction controller. The invention provides the pressure correction electronic scale for the furnace top burdening system of the blast furnace, which solves the problem that weighing is changed greatly in the charging bucket under the action of pressurizing and relief, has a simple structure and high accuracy and reliability, and is convenient to operate.
Description
Technical field
The present invention relates to a kind of blast-furnace burden system weighing device, especially relate to a kind of blast furnace furnace roof feed proportioning system pressure correction electronic scales.
Background technology
The iron and steel metallurgy enterprise of China, particularly large-scale Steel Plant have all taked superseded small furnace, the conversion of newly-built large blast furnace, the mass-producing effect can reach energy-saving and emission-reduction, enhances productivity, and promotes the purpose of quality product.Current newly-built blast furnace is generally all more than 2000 cubic metres, and this blast furnace all will be installed blast furnace pressure correction furnace roof electronic scales and carry out the adding of furnace charge, reaches the uniform distribution purpose.
For the correct weight of grasping the stove furnace charge, realize uniform distribution, just must accurately measure the weight of furnace charge in the furnace roof electronic scales batch can.The method of present furnace roof electronic scales batch can cloth in blast furnace, what adopt basically is the time method, has estimated in advance that promptly material has been put the required time in the batch can, the speed of rotation when determining cloth according to the time again reaches the purpose of uniform distribution with this.But dispensing speed is subjected to the influence of factors such as high furnace pressure, material particles to have very big variation, and the cloth uniformity coefficient can't be guaranteed.The inhomogeneous amount of tapping a blast furnace, the increase energy consumption that can influence blast furnace of blast furnace material distribution.Blast furnace furnace roof electronic scales is because the pressure jump factor affecting when being subjected to blast furnace furnace roof harsh environmental conditions and restricted mounting condition and cloth in addition, make the interior furnace charge metering of furnace roof batch can become a great technical barrier, this difficult problem never can be resolved.
Influential furnace roof electronic scales measure in the inaccurate factor again with pressure jump having the greatest impact metering accuracy.All there is a significant deficiency in the furnace roof electronic scales of using at present, promptly in pressurising switch opens moment or loose to compress switch and open moment and can produce weight and owe the revisal phenomenon, thisly owe the flase operation that the revisal phenomenon can cause the charging of blast furnace Controlling System when serious, upset the ordinary production order of blast furnace, cause heavy economic losses to blast furnace ironmaking.
Application number is that the Weighing system that 89220326.9 utility model discloses a kind of pulverized coal injection series can is on two jars of series connection coal dust pots and three jars of series connection coal dust pots at least two electronic scaless to be housed, and every electronic scales all links with computer, and, import computer after return each valve of control series can after computer stored, record, printing and the processing again when each weighing signal at the last canned mass that has.Accurate and the continuous recording of this Weighing system weighing, and can distinguish weighing and record.The structure that this technical scheme does not compensate the weighing structure is so its accuracy meeting differs greatly.
Application number is that 96239235.9 utility model discloses a kind of welding bellows pressure balance type corrugated expansion joint, its structure is made up of three layers of corrugated tube up and down, two-layer up and down is small corrugated pipe, the middle layer is big wave duct, corrugated tube is up and down the corrugated tube flange, loop expansion pipe is up and down the flange that connects with tank body, corrugated tube is the multilayered structure welding bellows, be hollow circular ring shape, loop expansion pipe is used for connecting between the coal dust pot up and down in coal injection system, its advantage is the effective reactive force of equilibrium system when the pressurising operation, makes tank body produce very little displacement, and is less to the weighing influence.Because the moment of pressure change complexity, especially air inlet and diffusing gas is to the having the greatest impact of weighing, so this technical scheme can't realize compensating accurately in this system.
Summary of the invention
The present invention solves the technical problem that in the existing in prior technology batch can internal pressure change procedure weighing is caused tremendous influence, provide a kind of simple in structure, easy to operate, precision is high, a kind of blast furnace furnace roof feed proportioning system pressure correction electronic scales of good reliability.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of blast furnace furnace roof feed proportioning system pressure correction electronic scales, described blast furnace upside is provided with batch can, be tightly connected by soft connection device between batch can and the blast furnace, be provided with some LOAD CELLS between batch can and the grate, batch can is provided with equalizer valve and diffuses valve, equalizer valve links to each other with the charging of blast furnace Controlling System with the control signal input terminus that diffuses valve, the signal output part that it is characterized in that described LOAD CELLS links to each other with the weight transmitter, the signal output part of weight transmitter links to each other with a pressure correction controller, be provided with baroceptor in the batch can, the signal output part of baroceptor links to each other with the pressure correction controller by pressure unit, and equalizer valve links to each other with the pressure correction controller respectively with the signal input part that diffuses valve.State of Blast Furnace liftout jar is the pressurized vessel that communicates with blast furnace, and blast furnace is at work 2 the atmospheric pressure of the time having an appointment in stove, for furnace charge is put into State of Blast Furnace, must pressurize in batch can be put into furnace charge in the blast furnace pressure in the batch can approximately greater than the pressure in the blast furnace chamber.Produce a power that makes progress at batch can in batch can pressurising process with respect to the LOAD CELLS that supports batch can and make the batch can come-up, thereby the power that is loaded on the LOAD CELLS is reduced, when serious even make batch can floating empty, make weighing instrument can not correctly reflect the actual weight of batch can.Need be with the pressure emptying in the batch can after blowing is finished in order to feed in raw material once more, pressure emptying process is the process that a pressure sharply descends, the pressure correction system can not reflect in time that the variation of pressure can produce the revisal error again, causes the inaccurate of weighing.
The signal of LOAD CELLS is sent to the weight transmitter, and the weight transmitter becomes analog quantity or digital quantity pressurization pressure revisal controller with the conversion of signals of transmitter output; Baroceptor signal pressurization pressure transmitter in the batch can converts analog signals to, this analog signals is also delivered to the pressure correction controller, the pressure correction controller receives batch can pressure simultaneously and fills, puts control signal, be respectively the equalizer valve input signal and diffuse the valve input signal, these two signals are eliminated because of pressurising, are loose and press the sudden change of the moment value of weighing as the revisal control signal of control pressure revisal controller.Parameters when man machine operation interface is used to pressure correction is set is carried out range designation to weight signal, pressure signal, determines the working parameter of pressure correction controller.
As preferably, be provided with long-range time zero control channel, remote pressure augmenting factor correction channel between described charging of blast furnace Controlling System and the pressure correction controller.Pressure correction controller receiving remote returns zero input signal, is used for making when revisal weight non-zero revisal weight to return zero; Pressure correction controller receiving remote pressure correction coefficient corrected signal is used to finely tune the pressure correction coefficient, makes the error that pressure correction controller energy is more convenient, revisal more accurately causes because of pressure.
As preferably, be provided with the anti-pretension device that comes to nothing between described batch can and the grate.When pressurising, the buoyancy that produces when pressure can cause the floating sky of whole batch can during greater than batch can weight, and LOAD CELLS will not stress this moment, and pressure compensating system can't carry out pressure compensation, at this moment just cannot accurately reflect the interior weight of material of batch can.In order to prevent this from occurring, just the anti-device that comes to nothing must be installed in the batch can outside, give precompression of LOAD CELLS, the size of precompression is greater than batch can and adds the batch can dead weight at the buoyancy that is subjected to being produced under the situation of peak pressure, could guarantee the pressure correction system correct buoyancy produced of revisal pressure under any circumstance like this.
As preferably, LOAD CELLS is provided with 34, is provided with the compensation terminal box between its signal output part and the weight transmitter.Behind 3 or 4 the LOAD CELLS uniform distribution, can be stable weigh.The compensation terminal box is the bridge that connects LOAD CELLS and weight transmitter, and all load cell signals are pooled to the compensation terminal box, and the weight signal after compiling is sent to the weight transmitter again and carries out aftertreatment.
As preferably, describedly be provided with weighing channel after the revisal from the pressure correction controller to the charging of blast furnace Controlling System.This channel can be transported to the charging of blast furnace Controlling System to weighing result, as the parameter of feed proportioning system work.
As preferably, described pressure correction controller links to each other with a personal-machine operation interface.Every controlled variable when being used to pressure correction is set is carried out the range designation operation to weight signal, pressure signal.Gravimetric value after the detection revisal in real time, gravimetric value, force value and the related work parameter of not revisal.
The beneficial effect that brings of the present invention is, solved the technical problem that in the existing in prior technology batch can internal pressure change procedure weighing is caused the big influence of tool, provide a kind of can be in batch can owing to being subjected to pressurising and the effect of diffusing causes a kind of blast furnace furnace roof feed proportioning system pressure correction electronic scales of weighing generation great variety, and simple in structure, easy to operate, precision is high, good reliability.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present invention;
Accompanying drawing 2 is a kind of fundamental diagrams of the present invention;
Accompanying drawing 3 is operation real-time curve charts of not eliminating over-compensation blast furnace furnace roof electronic scales;
Accompanying drawing 4 is operation real-time curve charts of eliminating the blast furnace furnace roof electronic scales of over-compensation.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: accompanying drawing 1 is a kind of structural representation of the present invention; Accompanying drawing 2 is a kind of fundamental diagrams of the present invention.The present invention is a kind of blast furnace furnace roof feed proportioning system pressure correction electronic scales, described blast furnace 4 upsides are provided with batch can 1, be tightly connected by soft connection device 2 between batch can and the blast furnace, circumferentially evenly be provided with three LOAD CELLS 3 between batch can and the grate, the signal output part of LOAD CELLS links to each other with the weight transmitter by the compensation terminal box, batch can is provided with equalizer valve and diffuses valve, equalizer valve links to each other with the charging of blast furnace Controlling System with the control signal input terminus that diffuses valve, the signal output part of weight transmitter links to each other with a pressure correction controller, be provided with baroceptor in the batch can, the signal output part of baroceptor links to each other with the pressure correction controller by pressure unit, and equalizer valve links to each other with the pressure correction controller respectively with the signal input part that diffuses valve.Be provided with long-range time zero control channel, remote pressure augmenting factor correction channel between described charging of blast furnace Controlling System and the pressure correction controller.Be provided with weighing channel after the revisal from the pressure correction controller to the charging of blast furnace Controlling System.This channel can be transported to the charging of blast furnace Controlling System to weighing result, as the parameter of feed proportioning system work.Be provided with the anti-pretension device 5 that comes to nothing between batch can and the grate.The pressure correction controller links to each other with a personal-machine operation interface.
Accompanying drawing 3 is operation real-time curve charts of not eliminating over-compensation blast furnace furnace roof electronic scales; Accompanying drawing 4 is the operation real-time curve chart of eliminating the blast furnace furnace roof electronic scales of over-compensation (wherein equalizer valve and diffuse on the number axis of valve signal 1 expression and open among the figure, 2 expressions are closed).This electronic scales in use, the signal of LOAD CELLS is sent to the weight transmitter, the weight transmitter becomes analog quantity or digital quantity signal pressurization pressure revisal controller with the conversion of signals of transmitter output; Baroceptor signal pressurization pressure transmitter in the batch can converts analog signals to, this analog signals is also delivered to the pressure correction controller, the pressure correction controller receives batch can pressure simultaneously and fills, puts control signal, be respectively the equalizer valve input signal and diffuse the valve input signal, these two signals are eliminated because of pressurising, are loose and press the sudden change of the moment value of weighing as the revisal control signal of control pressure revisal controller.Parameters when man machine operation interface is used for the input pressure revisal is carried out range designation to weight signal, pressure signal, determines the working parameter of pressure correction controller.In order to prevent this from occurring, just the anti-device that comes to nothing must be installed in the batch can outside, give precompression of LOAD CELLS, the size of precompression is greater than batch can and adds the batch can dead weight at the buoyancy that is subjected to being produced under the situation of peak pressure, could guarantee the pressure correction system correct buoyancy produced of revisal pressure under any circumstance like this.
So the present invention can cause a kind of blast furnace furnace roof feed proportioning system pressure correction electronic scales of weighing generation great variety owing to the effect that is subjected to pressurising and diffuse in batch can, and simple in structure, easy to operate, precision is high, the feature of good reliability.
Claims (7)
1. blast furnace furnace roof feed proportioning system pressure correction electronic scales, described blast furnace (4) upside is provided with batch can (1), be tightly connected by soft connection device (2) between batch can and the blast furnace, be provided with some LOAD CELLS (3) between batch can and the grate, batch can is provided with equalizer valve and diffuses valve, equalizer valve links to each other with the charging of blast furnace Controlling System with the control signal input terminus that diffuses valve, the signal output part that it is characterized in that described LOAD CELLS links to each other with the weight transmitter, the signal output part of weight transmitter links to each other with a pressure correction controller, be provided with baroceptor in the batch can, the signal output part of baroceptor links to each other with the pressure correction controller by pressure unit, and equalizer valve links to each other with the pressure correction controller respectively with the signal input part that diffuses valve.
2. blast furnace furnace roof feed proportioning system pressure correction electronic scales according to claim 1 is characterized in that being provided with between described charging of blast furnace Controlling System and the pressure correction controller long-range time zero control channel, remote pressure augmenting factor correction channel.
3. blast furnace furnace roof feed proportioning system pressure correction electronic scales according to claim 1 is characterized in that being provided with between described batch can and the grate the anti-pretension device (5) that comes to nothing.
4. blast furnace furnace roof feed proportioning system pressure correction electronic scales according to claim 1 is characterized in that described LOAD CELLS is provided with 34, is provided with the compensation terminal box between its signal output part and the weight transmitter.
5. according to claim 1 or 2 or 3 or 4 described blast furnace furnace roof feed proportioning system pressure correction electronic scaless, it is characterized in that the described weighing channel after the revisal that is provided with from the pressure correction controller to the charging of blast furnace Controlling System.
6. according to claim 1 or 2 or 3 or 4 described blast furnace furnace roof feed proportioning system pressure correction electronic scaless, it is characterized in that described pressure correction controller links to each other with a personal-machine operation interface.
7. blast furnace furnace roof feed proportioning system pressure correction electronic scales according to claim 5 is characterized in that described pressure correction controller links to each other with a personal-machine operation interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910307533 CN102021259B (en) | 2009-09-23 | 2009-09-23 | Pressure correction electronic scale for furnace top burdening system of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910307533 CN102021259B (en) | 2009-09-23 | 2009-09-23 | Pressure correction electronic scale for furnace top burdening system of blast furnace |
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| Publication Number | Publication Date |
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| CN102021259A true CN102021259A (en) | 2011-04-20 |
| CN102021259B CN102021259B (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI796041B (en) * | 2021-12-10 | 2023-03-11 | 中國鋼鐵股份有限公司 | Dynamic Pressure Compensation Method for Weighing System of Blast Furnace Roof Bunker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2069861U (en) * | 1989-12-05 | 1991-01-23 | 冶金工业部钢铁研究总院 | Weighing system for coal-blasting series tank of blast furnace |
| DE10114481A1 (en) * | 2001-03-24 | 2002-09-26 | Schenck Process Gmbh | Dynamic measurement of axle load or weight of vehicle involves comparing dynamic force sensor signal profile in measurement window with vibration-independent reference signal profile |
| CN201520773U (en) * | 2009-09-23 | 2010-07-07 | 余姚太平洋称重工程有限公司 | Pressure compensating electronic scale for batching system on roof of blast furnace |
-
2009
- 2009-09-23 CN CN 200910307533 patent/CN102021259B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2069861U (en) * | 1989-12-05 | 1991-01-23 | 冶金工业部钢铁研究总院 | Weighing system for coal-blasting series tank of blast furnace |
| DE10114481A1 (en) * | 2001-03-24 | 2002-09-26 | Schenck Process Gmbh | Dynamic measurement of axle load or weight of vehicle involves comparing dynamic force sensor signal profile in measurement window with vibration-independent reference signal profile |
| CN201520773U (en) * | 2009-09-23 | 2010-07-07 | 余姚太平洋称重工程有限公司 | Pressure compensating electronic scale for batching system on roof of blast furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI796041B (en) * | 2021-12-10 | 2023-03-11 | 中國鋼鐵股份有限公司 | Dynamic Pressure Compensation Method for Weighing System of Blast Furnace Roof Bunker |
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| CN102021259B (en) | 2013-02-20 |
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