CN108277320A - A kind of double bypass flow control devices of LF furnace bottoms Argon - Google Patents
A kind of double bypass flow control devices of LF furnace bottoms Argon Download PDFInfo
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- CN108277320A CN108277320A CN201810144386.1A CN201810144386A CN108277320A CN 108277320 A CN108277320 A CN 108277320A CN 201810144386 A CN201810144386 A CN 201810144386A CN 108277320 A CN108277320 A CN 108277320A
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 229910052786 argon Inorganic materials 0.000 title claims abstract description 75
- 239000007789 gas Substances 0.000 claims abstract description 54
- 230000033228 biological regulation Effects 0.000 claims abstract description 12
- 230000010354 integration Effects 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 12
- 230000001737 promoting effect Effects 0.000 abstract description 6
- 230000004044 response Effects 0.000 abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 11
- 238000007664 blowing Methods 0.000 description 10
- 210000002445 nipple Anatomy 0.000 description 10
- 239000010935 stainless steel Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000003723 Smelting Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005906 menstruation Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 241001076960 Argon Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 235000013876 argon Nutrition 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
- G05D7/0641—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means using a plurality of throttling means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Flow Control (AREA)
Abstract
A kind of double bypass flow control devices of LF furnace bottoms Argon, composition includes pressure-stabilizing distributor, two groups of argon gas blowpipes and PLC controller, the bottom of the pressure-stabilizing distributor is connect by air inlet pipe with argon gas source, every group of argon gas blowpipe includes main blowpipe, Argon air inlet ball valve, overflow type pressure regulation unit and integrated thermal mass flow controller, one end of the main blowpipe is connected to the inner cavity of pressure-stabilizing distributor, the other end is successively through Argon air inlet ball valve, overflow type pressure regulation unit and integrated thermal mass flow controller are connect with ladle, the integration thermal mass flow controller is connect by industrial bus with PLC controller.The argon flow amount that the present invention completes two groups of argon gas blowpipes jointly by PLC and integrated thermal mass flow controller controls, not only adjustment process is short, step response is fast, with good control accuracy and stability, and it is of simple structure and low cost, reliable for operation, it is suitable for promoting and applying in smelter.
Description
Technical field
The present invention relates to the argon gas flow control devices used when argon bottom-blowing in LF stove smelting processes stirs, belong to metal
Technical field of smelting.
Background technology
LF stoves need the stirring technique using ladle bottom blowing argon gas in refining process.After argon gas enters ladle bottom, on
Floating argon gas bubbles drive the molten steel in ladle to do the up and down motion to move in circles, make molten steel mixing, while argon gas bubbles can be with
It absorbs, the harmful gaseous impurities in release molten steel, improves smelting quality.The flow of argon gas needs servo-actuated according to arc smelting process
Adjustment, crossing conference causes molten steel strenuous exercise influence electric arc to control and be easy to be formed slag defect, too small, and stirring steel is not achieved
The purpose of water, influences smelting quality.So must be precise and stable to the control of argon bottom-blowing flow, step response speed is fast, resists
Perturbation is good, and flow-control scope is wide.
Traditional LF furnace bottom blowing argon gas flow control modes have following two：
One, electric control valve, restricting element control mode.Control signal is analog signals.The simulation aperture letter that PLC is generated
Number, live electric control valve is sent to control the opening size of ball valve in argon gas pipeline by cable, reaches control flow
Purpose, feedback signal is the analog signal that orifice flowmeter and temperature, pressure compensation transmitter generate.Although this system it is economical at
This is low but in control accuracy, stability, repeatability, there is many problems, especially orifice flowmeter for step response aspect
Measurement range is small, and the fining for not adapted to current product quality management control under small flow there are controlling dead error this disadvantage is wanted
It asks.
Two, electromagnetism valve island and flow transmitter control mode.Control signal is digital quantity switching signal.It will be simulated by PLC
The controlling value of amount form is converted into binary digital quantity by computing module, is later exported signal to scene by relay
Multiple solenoid valves on control valve island.Valve island reaches control stream by the combination of actions of the electromagnetic valve of corresponding different flow weights
The purpose of amount.This system adjustment process is short, step response is fast, but that there are mechanical parts is complicated, switch motion is frequently first
The defects of part is fragile, single failsafe valve can cause system concussion, poor fault tolerance, and expensive be unfavorable for promoting.
Invention content
It is an object of the invention to be directed to the drawback of the prior art, providing a kind of of simple structure and low cost, operation can
It leans on, control and stablize the double bypass flow control devices of accurate LF furnace bottoms Argon.
Problem of the present invention is realized with following technical proposals：
A kind of double bypass flow control devices of LF furnace bottoms Argon, composition include pressure-stabilizing distributor, two groups of argon gas blowpipes and PLC controls
The bottom of device processed, the pressure-stabilizing distributor is connect by air inlet pipe with argon gas source, every group of argon gas blowpipe include main blowpipe, Argon into
Balloon valve, overflow type pressure regulation unit and integrated thermal mass flow controller, one end of the main blowpipe and pressure-stabilizing distributor
Inner cavity connection, the other end is successively through Argon air inlet ball valve, overflow type pressure regulation unit and integrated thermal mass flow controller
It is connect with ladle, the integration thermal mass flow controller is connect by industrial bus with PLC controller.
The double bypass flow control devices of above-mentioned LF furnace bottoms Argon, the integration thermal mass flow controller includes main gas
Pipe, measurement pipe, preceding heater, preceding temperature sensor, post-heater, rear temperature sensor, flow controller, turbulent flow filter,
Laminar flow element and control valve, the main tracheae are serially connected in main blowpipe, and the turbulent flow filter, laminar flow element and control valve are along gas
Stream direction is sequentially arranged on main tracheae, and the both ends of the measurement pipe connect with main tracheae and are located at the front side of laminar flow element
And rear side, the preceding heater and post-heater are sequentially arranged at along airflow direction in measurement pipe, the preceding temperature sensor and
Temperature sensor is installed in measurement pipe and corresponding with preceding heater and post-heater respectively afterwards, preceding temperature sensor and after
The signal output end of temperature sensor connects the input port of flow controller, and the control valve is connected to the output end of flow controller
Mouthful, the flow controller is connect by industrial bus with PLC controller.
The double bypass flow control devices of above-mentioned LF furnace bottoms Argon are equipped with Anti-seismic pressure in one end that main blowpipe is connected with ladle
Power shows that transmitter and noise reduction pressure release unit, the Anti-seismic pressure show that the signal output end of transmitter connects PLC controller
Input port, the noise reduction pressure release unit connect the output port of PLC controller.
The double bypass flow control devices of above-mentioned LF furnace bottoms Argon, every group of argon gas blowpipe further include that other blowpipe, side blow into gas and cut
Only control unit is blown on valve and side, and one end of the other blowpipe is connected to the inner cavity of pressure-stabilizing distributor, and the other end is blown into through side successively
Gas shut-off valve and the other piping connection for blowing control unit and integrated thermal mass flow controller outlet side, control is blown on the side
The signal input part of unit connects the output port of PLC controller.
The double bypass flow control devices of above-mentioned LF furnace bottoms Argon, every group of argon gas blowpipe further includes redundancy pipe, the redundancy pipe
A termination pressure-stabilizing distributor inner cavity, the other end connect through redundancy air inlet ball valve with ladle.
It is equipped with non-return valve on the double bypass flow control devices of above-mentioned LF furnace bottoms Argon, the main blowpipe and other blowpipe.
It is remote to be equipped with bleed pressure at the top of the pressure-stabilizing distributor for above-mentioned LF furnace bottoms Argon double bypass flow control devices
Pass table.
The present invention is completed the argon flow amount control of two groups of argon gas blowpipes by PLC and integrated thermal mass flow controller jointly
System, not only adjustment process is short, step response is fast, has good control accuracy and stability, and simple in structure, at low cost
It is honest and clean, reliable for operation, it is suitable for promoting and applying in smelter.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of integrated thermal mass flow controller；
Fig. 3 is the flow detection schematic diagram of integrated thermal mass flow controller；
Fig. 4 is the control system block diagram of integrated thermal mass flow controller.
It is marked in figure as follows：1, pressure-stabilizing distributor, 2, bleed pressure remote installed meter, 3, Argon air inlet ball valve, 4, overflow type tune
Press unit, 5, integrated thermal mass flow controller, 5-1, main tracheae, 5-2, measurement pipe, 5-3, preceding heater, 5-4, preceding temperature
Spend sensor, 5-5, post-heater, 5-6, rear temperature sensor, 5-7, flow controller, 5-8, turbulent flow filter, 5-9, laminar flow
Element, 5-10, control valve, 6, it is main blow non-return valve, blow threeway by the of 7,90 degree, 8,90 degree take source threeway, 9, Anti-seismic pressure shows
Transmitter, 10,90 degree of pressure release threeways, 11, noise reduction pressure release unit, 12, side blow air inlet stop valve, 13, side blow control unit, 14,
Non-return valve is blown on side, and 15, hose assembly, 16, redundancy air inlet ball valve, 17, main blowpipe, 18, other blowpipe, 19, redundancy pipe, 20, air inlet
Pipe, 21, PLC controller.
Specific implementation mode
Referring to Fig. 1 and Fig. 2, the present invention mainly by pressure-stabilizing distributor 1, bleed pressure remote installed meter 2, Argon air inlet ball valve 3, overflow
Flow pattern pressure regulation unit 4, integrated thermal mass flow controller 5, main blow blow 7,90 degree of threeway by 6,90 degree of non-return valve and take source three
Logical 8, Anti-seismic pressure shows that 9,90 degree of pressure release threeways 10 of transmitter, noise reduction pressure release unit 11, air inlet stop valve 12 is blown on side, side is blown
Control unit 13, side blow non-return valve 14, hose assembly 15, redundancy air inlet ball valve 16, PLC controller 21 and other stainless steel pipes
Composition.Device has a cabinet protection, and cabinet size is H1600 x W1800 x D400, and the connection type of pipe fitting is spiral shell in device
Line connects, and polytetrafluoroethylene tape is tied at connection screw thread.It is the interface of device inlet, outlet on the right side of box house, totally five, from upper
And lower is respectively A group argon gas blowpipe Argons gas outlet, the emergent gas outlet of A group argon gas blowpipe redundancies, B group argon gas blowpipe Argon outlets
The emergent gas outlet of mouth, B group argon gas blowpipe redundancies, 1 air inlet of pressure-stabilizing distributor.A group argon gas blowpipes and B group argon gas blowpipes are right respectively
Answer A rifles and B rifles.
The critical piece of the present invention is integrated thermal mass flow controller, has been internally integrated High Performance DSP processing
Device（Flow controller）, high-precision flow detection sensor（Two temperature sensors）, precision stepper motor driving control valve,
The elements such as PROFINET industrial-controlled general line network interface cards, the process of flow detection and control that can be needed for complete independently ensure that A, B are bis-
The bottom blowing ar system of branch supplies demand.It is connected between PLC controller thermal mass flow controller integrated with two
24VDC power supplies line and PROFINET industrial field bus private cables.Integrated thermal mass flow controller power supply electricity
Source interface form is DB9, and data-interface is RJ45 interfaces.The present apparatus realizes control process from the stripping in PLC, forms collection
The architecture mode of middle display, decentralised control.
Pressure-stabilizing distributor 1 is located at flow control case inside left, vertical installation, high 135mm, outer diameter 135mm, nominal pressure
For PN40, material is austenite 316L stainless steels.Gas access is located at its bottom, and gas outlet totally 6 is located on the right side of unit
It arranges from top to bottom.6 gas outlets are sequentially connected the main blowpipe of A group argon gas blowpipes, A group argon gas blowpipe side blowpipe, A groups from top to bottom
Argon gas blowpipe redundancy pipe, the main blowpipe of B group argon gas blowpipes, B group argon gas blowpipe side blowpipe, B group argon gas blowpipe redundancy pipes, adjacent outlets
The distance of center line in vertical direction is respectively 235mm, 120mm, 300mm, 235mm, 120mm.
Argon air inlet ball valve 3 is located at main blowpipe（It measures and divides）On the road, it is horizontally mounted, left side passes through with pressure-stabilizing distributor 1
DN20 stainless steel pipe nipples are connected, and right side is connected with overflow type pressure regulation unit 4 by DN20 stainless steel pipe nipples, and ball valve nominal promoting menstruation is
DN20, nominal pressure PN25.
Overflow type pressure regulation unit 4 is horizontally mounted, and right side is stainless by DN25 with integrated thermal mass flow controller 5
Steel pipe nipple is connected, overflow type pressure regulation unit 4 high 154mm, long 75mm, bore 25mm.
Integrated thermal mass flow controller 5 is horizontally mounted, left to bore outer silk turn by English with overflow type pressure regulation unit
24 ° of metric system cutting ferrule internal thread straight couplings are connected, right to turn 24 ° of metric system cutting ferrule internal threads by the outer silk of English cone with the main non-return valve 6 that blows
Straight coupling is connected, and gas mass flow detection body part material is 316L stainless steels, and high 238mm, long 171mm, power supply connects
Mouth is DB9 female connectors, and data-interface is RJ45 type PROFINET connectors.Inlet, outlet aperture is 1/2 ＂, left side air inlet termination
Away from the distance at 4 center of overflow type pressure regulation unit it is 200mm at head center, away from blowing three by the of 90 degree at the connector center of right side outlet side
Distance is 275mm at logical center.
The main non-return valve 6 that blows is horizontally mounted in inverted T shaped, it is left with integrated thermal mass flow controller 5 by DN20 not
The steel pipe nipple that becomes rusty is connected, and the right side blows threeway 7 with 90 degree of sides and is connected by DN20 stainless steel pipe nipples, inside nominal diameter DN20.
90 degree other blow threeway 7 be horizontally mounted it is T-shaped, it is left to blow non-return valve 6 with main and be connected by DN20 stainless steel pipe nipples, it is right
Source threeway 8 is taken to be connected by DN20 stainless steel pipe nipples with 90 degree, it is lower to be connected with the hose assembly 15 that one end is connected on other blowpipe,
Inside nominal diameter is DN20.
Anti-seismic pressure shows that transmitter 9 is horizontally installed to 90 degree and takes in source threeway 8, and 90 degree take 8 left side of source threeway and master
It blows non-return valve 6 and blows the connection of threeway 7 by 90 degree of sides, the right side is connected with noise reduction pressure release unit 11 by 90 degree of pressure release threeways 10.
90 degree of pressure release threeways 10 are horizontally mounted T-shaped, and a left side with 90 degree takes source threeway 8 to pass through DN20 stainless steel pipe nipple phases
Even.
Noise reduction pressure release unit 11 is vertically-mounted, and pressure relief element is open vertically downward, and electric control element and outlet direction to the left, are controlled
Cable processed is KVVP 4x1.5, and control signal is 24VDC.
It blows air inlet stop valve 12 and is located at other blowpipe in side（Automatically controlled bypass branch）On, horizontal direction installation is left to be distributed with voltage stabilizing
The outlet of device 1 is connected, and horizontal centre linear distance upper branch 1 measures branch horizontal center line 220mm, valve nominal promoting menstruation DN20
Nominal pressure is PN25.
Side is blown installs in 13 horizontal direction of control unit, and a left side blows air inlet stop valve 12 with side and passes through DN20 stainless steel pipe nipple phases
Even, the right side blows non-return valve 14 with side and is connected by DN20 stainless steel pipe nipples, and electric control element and outlet direction are upward, and control cable is
KVVP 4x1.5, signal 24VDC.
It is in inverted T shaped that the installation of 14 horizontal direction of non-return valve is blown on side, and right side blows non-return valve 6 with master and passes through 15 phase of hose assembly
Even, inside nominal diameter DN20.
15 left end of hose assembly is connected to side and blows 14 right-hand joint of non-return valve, and right end, which is connected to by the of 90 degree, blows 7 connector of threeway
Lower side connector on.The length of 500mm, turning radius 200mm, connector inside nominal diameter are DN20.
Redundancy air inlet ball valve 16 is horizontally mounted, and left side is connected with pressure-stabilizing distributor 1, valve nominal promoting menstruation DN20, nominal
Pressure is PN25.
Two groups of argon gas blow tube constructions are identical.
The course of work of the present invention is as follows：
The data of flow set are sent to the integrated hot type in field device by PLC controller by PROFINET industrial bus
Mass flow controller 5.After receiving control signal, the control valve 5-10 of integrated thermal mass flow controller 5 starts to move
Make, referring to Fig. 2, the gas in main tracheae 5-1 partly enters measurement pipe 5-2 after turbulent flow filter 5-8.Referring to Fig. 3 and figure
4, the signal of two temperature sensors of high precision detection（Temperature difference）At AD conversion, smothing filtering, check form method linearity, differential
A series of signal processing and the measured value of gas mass flow is calculated to flow control in reason etc., and flow value passes through
PROFINET buses are back to PLC controller.Flow-rate adjustment control process separates valve stage, normal regulating stage, stabilization sub stage
Three phases altogether, the dsp processor under working condition in integrated thermal mass flow controller 5（Flow controller）It adjusts respectively
It is controlled with parameter Kopen, Knormal, Kstable segmentation.Fig. 4 is the control of integrated thermal mass flow controller 5
Block diagram, wherein parameter Kspeed velocity factor in order to control are used for the adjusting of controller response speed speed, are that Kp values calculate
Basic data, Kspeed values Discrete control in adjustment process, respectively Kopen, Knormal, Kstable.Parameter Kp is
The multiplication factor of controller plays proportional action.Kp ＇=Kp*1.05(128-Kspeed).Parameter Kopen be regulating valve from full off state to
The Kspeed values started to open up.Parameter Knormal Kspeed values of device during normal control in order to control.Parameter
When Kstable enters the stabilization sub stage in order to control, i.e., Kspeed values when actual value is within the scope of set point error 2%.Ginseng
Number P, I, D be respectively ratio, integral, differential control english abbreviation.Parameter 1+td/ti is that proportionality coefficient symbol is write a Chinese character in simplified form.Parameter ∫
It is write a Chinese character in simplified form for integral coefficient symbol.D/td is that differential coefficient symbol is write a Chinese character in simplified form.Dsp processor is according to the model stored in data storage
Data parameters and algorithm calculate valve seat opening, then continuously control built-in control valve 5- by the PMW stepper motors driven
10 actions, realize the PID adjustment processes to argon bottom-blowing flow, ensure the demand of the argon bottom-blowing of the double branches of A, B rifle.Anti-seismic
Pressure shows that the measured value of Argon pressure is sent to PLC controller by analog signal and is referred to flow set by transmitter 9.
Master, which blows non-return valve 6, non-return valve 14 is blown on side can prevent in argon gas recharge to device.After Argon, integrated thermal mass flow
Controller 5 stops adjusting, and built-in control valve 5-10 restores zero-bit, and PLC controller is controlled residual in discharge pipe by switching signal
The high pressure gas stayed, the electromagnetic valve body of noise reduction pressure release unit 11 is automatically closed after 3S.When integrated thermal mass flow controls
5 failure of device or work condition abnormality, when normal gas supply cannot be satisfied demand, worker's local operation manually controls side and blows control unit 13,
The pattern of bypass gas supply is formed to ensure that the smelting of molten steel is completed.A, when the argon blowing pipeline of the double branches of B rifles occurs to block or reveal
The gas supply demand that worker can be met an urgent need by the 16 manually opened redundancy of redundancy air inlet ball valve in device under branch completion emergency rating,
Ensure the production requirement under emergency rating.
The present invention has the following advantages：
1, apparatus structure is compact, occupied ground is small, and in-site installation bit selecting is flexibly, conveniently.
2, device data transmission uses the PROFINET industrial bus with isochronism characteristic, transmission speed fast, anti-interference
Property is good.Topological structure is flexible, abundant, and later stage extension is convenient.
3, device have it is other blow switching, manual redundancy emergency function can meet demand for control under the conditions of special operation condition.
4, integrated thermal mass flow controller be integrated with high-precision flow detection, control assembly being capable of complete independently pair
The PID adjustment processes of argon flow amount significantly reduce operation, the control task of PLC controller, improve LF stove robot control system(RCS)s
Stability and operational efficiency.
Claims (7)
1. a kind of double bypass flow control devices of LF furnace bottoms Argon, characterized in that composition includes pressure-stabilizing distributor（1）, two groups
Argon gas blowpipe and PLC controller（21）, the pressure-stabilizing distributor（1）Bottom pass through air inlet pipe（20）It is connect with argon gas source, often
Group argon gas blowpipe includes main blowpipe（17）, Argon air inlet ball valve（3）, overflow type pressure regulation unit（4）With integrated thermal mass stream
Amount controller（5）, the main blowpipe（17）One end and pressure-stabilizing distributor（1）Inner cavity connection, the other end successively through Argon into
Balloon valve（3）, overflow type pressure regulation unit（4）With integrated thermal mass flow controller（5）It is connect with ladle, the integration
Thermal mass flow controller（5）Pass through industrial bus and PLC controller（21）Connection.
2. a kind of double bypass flow control devices of LF furnace bottoms Argon according to claim 1, characterized in that the integration
Thermal mass flow controller（5）Including main tracheae（5-1）, measurement pipe（5-2）, preceding heater（5-3）, preceding temperature sensor
（5-4）, post-heater（5-5）, rear temperature sensor（5-6）, flow controller（5-7）, turbulent flow filter（5-8）, laminar flow member
Part（5-9）And control valve（5-10）, the main tracheae（5-1）It is serially connected in main blowpipe（17）In, the turbulent flow filter（5-8）、
Laminar flow element（5-9）And control valve（5-10）It is sequentially arranged at main tracheae along airflow direction（5-1）On, the measurement pipe（5-2）
Both ends and main tracheae（5-1）It connects and is located at laminar flow element（5-9）Front side and rear side, the preceding heater（5-3）
And post-heater（5-5）It is sequentially arranged at measurement pipe along airflow direction（5-2）On, the preceding temperature sensor（5-4）With rear temperature
Spend sensor（5-6）It is installed in measurement pipe（5-2）It is upper and respectively with preceding heater（5-3）And post-heater（5-5）It is corresponding,
Preceding temperature sensor（5-4）With rear temperature sensor（5-6）Signal output end connect flow controller（5-7）Input port,
The control valve（5-10）It is connected to flow controller（5-7）Output port, the flow controller（5-7）Pass through industrial bus
With PLC controller（21）Connection.
3. a kind of double bypass flow control devices of LF furnace bottoms Argon according to claim 1 or 2, characterized in that blown in master
Pipe（17）The one end being connected with ladle is equipped with Anti-seismic pressure and shows transmitter（9）With noise reduction pressure release unit（11）, the antidetonation
Type pressure shows transmitter（9）Signal output end connect PLC controller（21）Input port, the noise reduction pressure release unit（11）
Connect PLC controller（21）Output port.
4. a kind of double bypass flow control devices of LF furnace bottoms Argon according to claim 3, characterized in that every group of argon gas is blown
Pipe further includes other blowpipe（18）, side blow air inlet stop valve（12）Control unit is blown with side（13）, the other blowpipe（18）One end
With pressure-stabilizing distributor（1）Inner cavity connection, the other end blows air inlet stop valve through side successively（12）Control unit is blown with side（13）With
Integrated thermal mass flow controller（5）Control unit is blown on the piping connection of outlet side, the side（13）Signal input part
Connect PLC controller（21）Output port.
5. a kind of double bypass flow control devices of LF furnace bottoms Argon according to claim 4, characterized in that every group of argon gas is blown
Pipe further includes redundancy pipe（19）, the redundancy pipe（19）One termination pressure-stabilizing distributor（1）Inner cavity, the other end is through redundancy air inlet
Ball valve（16）It is connect with ladle.
6. a kind of double bypass flow control devices of LF furnace bottoms Argon according to claim 5, characterized in that the main blowpipe
（17）With other blowpipe（18）On be equipped with non-return valve.
7. a kind of double bypass flow control devices of LF furnace bottoms Argon according to claim 6, characterized in that the voltage stabilizing point
Orchestration（1）Top bleed pressure remote installed meter is installed（2）.
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| CN201810144386.1A CN108277320A (en) | 2018-02-12 | 2018-02-12 | A kind of double bypass flow control devices of LF furnace bottoms Argon |
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| CN201810144386.1A CN108277320A (en) | 2018-02-12 | 2018-02-12 | A kind of double bypass flow control devices of LF furnace bottoms Argon |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111992680A (en) * | 2020-08-28 | 2020-11-27 | 武汉钢铁有限公司 | Device for protecting pouring by blowing argon in tundish and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5279154A (en) * | 1990-06-14 | 1994-01-18 | Unit Instruments, Inc. | Thermal mass flow sensor |
| CN202870632U (en) * | 2012-10-31 | 2013-04-10 | 张旭 | Cabinet integrated mass flow controller type bottom blowing device specially for metallurgy |
| CN202936439U (en) * | 2012-11-28 | 2013-05-15 | 重庆赛联自动化工程技术有限公司 | Intellectualized integrated pneumatic control device for steel making blowing gas control |
| US20140182692A1 (en) * | 2011-05-10 | 2014-07-03 | Fujikin Incorporated | Pressure type flow control system with flow monitoring |
| CN204374787U (en) * | 2015-02-02 | 2015-06-03 | 西安宝科流体技术有限公司 | A kind ofly realize the gas mass flow controller regulating greatly ratio |
| CN208038489U (en) * | 2018-02-12 | 2018-11-02 | 唐山钢铁集团微尔自动化有限公司 | A kind of double bypass flow control devices of LF furnace bottoms Argon |
-
2018
- 2018-02-12 CN CN201810144386.1A patent/CN108277320A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5279154A (en) * | 1990-06-14 | 1994-01-18 | Unit Instruments, Inc. | Thermal mass flow sensor |
| US20140182692A1 (en) * | 2011-05-10 | 2014-07-03 | Fujikin Incorporated | Pressure type flow control system with flow monitoring |
| CN202870632U (en) * | 2012-10-31 | 2013-04-10 | 张旭 | Cabinet integrated mass flow controller type bottom blowing device specially for metallurgy |
| CN202936439U (en) * | 2012-11-28 | 2013-05-15 | 重庆赛联自动化工程技术有限公司 | Intellectualized integrated pneumatic control device for steel making blowing gas control |
| CN204374787U (en) * | 2015-02-02 | 2015-06-03 | 西安宝科流体技术有限公司 | A kind ofly realize the gas mass flow controller regulating greatly ratio |
| CN208038489U (en) * | 2018-02-12 | 2018-11-02 | 唐山钢铁集团微尔自动化有限公司 | A kind of double bypass flow control devices of LF furnace bottoms Argon |
Non-Patent Citations (3)
| Title |
|---|
| 李宁 等: "钢包底吹氩控制系统的完善与改进" * |
| 李文成: "热式气体质量流量计在钢铁企业氧氮氩计量中的应用" * |
| 蔡武昌等, 化学工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111992680A (en) * | 2020-08-28 | 2020-11-27 | 武汉钢铁有限公司 | Device for protecting pouring by blowing argon in tundish and control method |
| CN111992680B (en) * | 2020-08-28 | 2022-03-01 | 武汉钢铁有限公司 | Device for protecting pouring by blowing argon in tundish and control method |
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