CN208038489U - 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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- CN208038489U CN208038489U CN201820249733.2U CN201820249733U CN208038489U CN 208038489 U CN208038489 U CN 208038489U CN 201820249733 U CN201820249733 U CN 201820249733U CN 208038489 U CN208038489 U CN 208038489U
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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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 utility model 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 argon gas flow control device that the utility model is related to be used when argon bottom-blowing in LF stove smelting processes stirs, belongs to
The technical field of smelting of metal.
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 that PLC is generated
Signal is sent to live electric control valve to control the opening size of ball valve in argon gas pipeline by cable, reaches control stream
The purpose of amount, feedback signal are the analog signal that orifice flowmeter and temperature, pressure compensation transmitter generate.Although this system is economical
It is at low cost but in control accuracy, stability, repeatability, there is many problems, especially orifice flow in terms of step response
Count that measurement range is small, there are the finings that controlling dead error this disadvantage has not adapted to current product quality management control under small flow
It is required that.
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.
Utility model content
The purpose of this utility model is that for the drawback of the prior art, a kind of of simple structure and low cost, operation is provided
Reliably, the double bypass flow control devices of accurate LF furnace bottoms Argon are stablized in control.
Problem described in the utility model 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
The bottom of PLC controller, the pressure-stabilizing distributor is connect by air inlet pipe with argon gas source, every group of argon gas blowpipe include main blowpipe,
Argon air inlet ball valve, overflow type pressure regulation unit and integrated thermal mass flow controller, one end of the main blowpipe and voltage stabilizing
The inner cavity of distributor is connected to, and the other end is successively through Argon air inlet ball valve, overflow type pressure regulation unit and integrated thermal mass flow
Controller is connect with ladle, and 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 utility model is completed the argon gas stream of two groups of argon gas blowpipes by PLC and integrated thermal mass flow controller jointly
Amount control, not only adjustment process is short, step response is fast, has good control accuracy and stability, and simple in structure, cost
It is cheap, reliable for operation, it is suitable for promoting and applying in smelter.
Description of the drawings
The utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic 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 utility model is mainly by pressure-stabilizing distributor 1, bleed pressure remote installed meter 2, Argon air inlet ball valve
3, overflow type pressure regulation unit 4, integrated thermal mass flow controller 5, main blow are blown 7,90 degree of threeway by 6,90 degree of non-return valve and are taken
Source threeway 8, Anti-seismic pressure show transmitter 9,90 degree of pressure release threeways 10, noise reduction pressure release unit 11, side blow air inlet stop valve 12,
Control unit 13 is blown on side, non-return valve 14 is blown on side, hose assembly 15, redundancy air inlet ball valve 16, PLC controller 21 and other stainless steels
Pipe fitting forms.Device has a cabinet protection, and cabinet size is H1600 x W1800 x D400, the connection type of pipe fitting in device
To be threadedly coupled, 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,
It 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 Argons from top to bottom
Gas outlet, the emergent gas outlet of B group argon gas blowpipe redundancies, 1 air inlet of pressure-stabilizing distributor.A group argon gas blowpipes and B group argon gas blowpipes point
Other corresponding A rifle and B rifles.
The critical piece of the utility model is integrated thermal mass flow controller, has been internally integrated High Performance DSP
Processor（Flow controller）, high-precision flow detection sensor（Two temperature sensors）, precision stepper motor driving control
The elements such as valve processed, PROFINET industrial-controlled general line network interface cards, the process of flow detection and control that can be needed for complete independently, ensure
A, the bottom blowing ar system of the bis- branches of B supplies demand.It is connect between PLC controller thermal mass flow controller integrated with two
There are 24VDC power supplies line and PROFINET industrial field bus private cables.Integrated thermal mass flow controller power supply
Power interface form is DB9, and data-interface is RJ45 interfaces.The present apparatus realizes control process from the stripping in PLC, forms
Centralized displaying, decentralised control architecture mode.
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 utility model is as follows：
The data of flow set are sent to the integration in field device by PLC controller by PROFINET industrial bus
Thermal mass flow controller 5.After receiving control signal, the control valve 5-10 of integrated thermal mass flow controller 5 is opened
Initiating is made, and referring to Fig. 2, the gas in main tracheae 5-1 partly enters measurement pipe 5-2 after turbulent flow filter 5-8.Integration
Dsp processor in thermal mass flow controller 5（Flow controller）The letter detected according to two temperature sensors of high precision
Number（Temperature difference）The measured value of gas mass flow is calculated to flow control, flow value is back to by PROFINET buses
PLC controller.And built-in control valve 5-10 actions are continuously controlled by the PMW stepper motors driven, it realizes to argon bottom-blowing
The PID adjustment processes of flow ensure the demand of the argon bottom-blowing of the double branches of A, B rifle.Anti-seismic pressure shows that transmitter 9 passes through mould
The measured value of Argon pressure is sent to PLC controller and is referred to flow set by quasi- signal.Master blows non-return valve 6, check is blown on side
Valve 14 can prevent in argon gas recharge to device.After Argon, integrated thermal mass flow controller 5 stops adjusting, built-in
Control valve 5-10 restores zero-bit, and PLC controller controls remaining high pressure gas in discharge pipe by switching signal, and 3S disappears later
The electromagnetic valve body of sound pressure release unit 11 is automatically closed.When integrated 5 failure of thermal mass flow controller or work condition abnormality, normally
When gas supply cannot be satisfied demand, worker's local operation manually controls side and blows control unit 13, forms the pattern of bypass gas supply to protect
The smelting for demonstrate,proving molten steel is completed.A, worker can pass through the redundancy in device when the argon blowing pipeline of the double branches of B rifles occurs to block or reveal
The gas supply demand that 16 manually opened redundancy of air inlet ball valve is met an urgent need under branch completion emergency rating ensures that the production under emergency rating needs
It asks.
The utility model 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820249733.2U CN208038489U (en) | 2018-02-12 | 2018-02-12 | A kind of double bypass flow control devices of LF furnace bottoms Argon |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820249733.2U CN208038489U (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 |
|---|---|---|---|---|
| CN108277320A (en) * | 2018-02-12 | 2018-07-13 | 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 |
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2018
- 2018-02-12 CN CN201820249733.2U patent/CN208038489U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108277320A (en) * | 2018-02-12 | 2018-07-13 | 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 |
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