CN107641677B - A kind of method for preventing skidding of wheels of converter oxygen gun - Google Patents
A kind of method for preventing skidding of wheels of converter oxygen gun Download PDFInfo
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- CN107641677B CN107641677B CN201711089338.9A CN201711089338A CN107641677B CN 107641677 B CN107641677 B CN 107641677B CN 201711089338 A CN201711089338 A CN 201711089338A CN 107641677 B CN107641677 B CN 107641677B
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Abstract
The present invention relates to a kind of method for preventing skidding of wheels of converter oxygen gun, one, determine oxygen rifle load force F；Two, determine load force effect under make oxygen rifle occur deflection angle --- anti-bias hanging position oxygen rifle reserves deflection angle；Three, deflection angle theta is reserved according to oxygen rifleB, determine the height difference H of oxygen rifle two sides snap-gauge, fixing chuck plate keeps the snap-gauge of the loaded side of oxygen rifle H lower than the snap-gauge of non-loaded side.The present invention reserves deflection angle theta when production does not start, to hanging oxygen rifleB, offset in production process suffered cooling water side to the load force deflection angle that occurs reaches the accurate centering of oxygen rifle in production process.
Description
Technical field
The present invention relates to field of smelting, in particular to a kind of method for preventing skidding of wheels of converter oxygen gun.
Background technique
Converter steelmaking process rises in the 1960s, because it has the spies such as quick, inexpensive, steel grade is adaptable
Point is widely used in the smelting of steel, and the iron and steel output of nowadays pneumatic steelmaking production has accounted for the one of world steel yield
Half or more.
Oxygen rifle is the core equipment that pneumatic steelmaking is supplied oxygen to bath, it works under furnace high-temperature, is carried out using recirculated water
Cooling, its performance quality directly influences the main economic and technical indices such as steel-making yield and quality, original fuel consumption and cost.
It smelts the speed that the requirement for oxygen rifle is oxygen stream stock and wants fast, penetration capacity is eager to excel, and to have sufficiently high stirring power to molten bath
Power, slugging effect is good, splash wants small, wants small to the erosion of furnace lining, can neither damage furnace bottom, and furnace bottom rising cannot be made too fast,
The converting process effect to be generated seek to quick heating, carbon drop are fast, slugging is fast, the slag getting dry time is short, to furnace lining damage it is small.
Oxygen rifle is made of pipette tips, the body of a gun and gun breech, and gun body has the effect of oxygen supply and cooling concurrently.Tube body is by three layers of seamless steel pipe
Composition: inner tube is oxygen channel, is the channel into cooling water between inner tube and middle tube, is between middle tube and outer tube
Exhalant canal.In pneumatic steelmaking production process, oxygen rifle directly affects the safe and efficient and molten steel matter of pneumatic steelmaking production
Amount.It is unfavorable such as to there is equipment fault, operating mistake or safety measure, then may explode, seriously affect safety in production.Therefore
The control of oxygen rifle is very important production link, especially operating process and wants strict guarantee oxygen rifle centering verticality, otherwise holds
Safety and production accident easily occurs, since oxygen rifle is not only grown, but also again, associated ping is more, guarantees that oxygen rifle has accurate centering verticality
It is extremely crucial.
Related patents oxygen rifle centering fast adjuster (publication number: CN201512552U), a kind of fast velocity modulation of oxygen rifle centering
Four adjusting nuts are respectively set on four angles of oxygen rifle flange in regulating device, including oxygen rifle flange, by the first adjustment bolt,
Two adjustment bolts, third adjustment bolt and the 4th adjustment bolt are screwed in respectively on four adjusting nuts.The centering tune of the patent
Regulating device structure is relatively simple, may be implemented more quickly to adjust, but this method be in the case where converter does not produce into
Row adjusts operation, makes oxygen rifle in the case where no side loading, and axis is overlapped with center line, however in the practical steel-making life of converter
During production, the pipeline that oxygen rifle top is connected in the same side is since the gas and water that are passed through cause side loading, so that oxygen rifle meeting
It deflects, therefore in actual steelmaking process, this mode for adjusting oxygen rifle centering does not play guarantee oxygen rifle
The effect of centering will affect the normal production of converter.
The offline position rapid and accurate centering method of patent document converter oxygen gun (publication number: CN2226604) discloses a kind of turn
The offline position rapid and accurate centering method of furnace oxygen lance, specifically includes: a, by cross traveling trolley and the lifting being attached on cross traveling trolley
Trolley is moved to blowing position by cross moving track, and center line is connected on lift cart；B, lift cart passes through under fluctuating orbit
The position of lift cart when dropping to normal blowing, protrudes into the bottom end of center line in oxygen rifle mouth, adjustment center line and oxygen rifle mouth
Axial line is overlapped；C, lift cart is risen by fluctuating orbit, is attached to lift cart on cross traveling trolley, will along cross moving track
Cross traveling trolley and lift cart, which are moved to, waits position；D, oxygen rifle is assembled on lift cart, makes the axis and center line weight of oxygen rifle
It closes.This method can be improved the efficiency that oxygen rifle is fitted into oxygen rifle mouth, but this method is also in the non-STEELMAKING PRODUCTION of converter
In the case of carry out, by its concrete operations, be overlapped the axis of oxygen rifle with center line, however in the practical STEELMAKING PRODUCTION mistake of converter
Cheng Zhong, the side loading as caused by oxygen rifle connecting pipe water flowing etc., will cause oxygen rifle and deflects, and there is no realize steel-making life
Oxygen rifle centering when production.
A kind of converter oxygen gun limiting device of patent document and method (publication number CN103205528A), the invention provide one kind
Converter oxygen gun limiting device and method, including cylinder, limited block, gag lever post, limited block pedestal, cylinder block and limit switch；Gas
Cylinder piston rod is connect with limited block, and limited block is movably connected in the slide opening of L shape limited block pedestal top, in limited block pedestal
Medial and lateral are respectively equipped with limit switch, and limit switch is connect with PLC.Using working position limit switch and position limit switch is waited,
Oxygen rifle and machinery are controlled by the oxygen rifle limit control program in PLC respectively as the preparation and control condition of the slag that blows, splashes
The interoperation of limiting device realizes that low rifle position splashes slag, the blowing operation of high rifle position.This method, which can make to splash slag rifle position, to be even lower,
Slag effect is splashed in raising, and saving is splashed the slag time, is reduced nitrogen consumption, is improved converter utilization rate；And oxygen rifle is effectively prevent to fall, it reduces
Spare parts consumption and expense expenditure, but there is no solve the side loading as caused by oxygen rifle connecting pipe water flowing etc. for this method
The problem of bringing it about deflection.
Board-like oxygen rifle Quick replacing device (publication number CN1041952866A) in patent document tune, the trolley including oxygen rifle are flat
Platform, trolley platform are loaded with the docking facilities of the fixation device of oxygen rifle and oxygen rifle, oxygen rifle, set between docking facilities and trolley platform
There is the centralising device of oxygen rifle, centralising device has plate and heading in tune, and the upper and lower ball end of heading is flat with plate in tune and trolley respectively
Platform is flexibly connected, and the weight of oxygen rifle is shared the plate in tune by the metal hose with its flanged joint by the push pipe in docking facilities
On, because in unbalance stress, plate can make itself to generate inclination as the spring that quadrangle is oppressed in the center of circle using steel ball plate in tune in adjusting, so
Plate in tune is forced to generate a certain amount of inclination from power of hanging down because what self weight generated using oxygen rifle, to guarantee the verticality of oxygen rifle.
The difficulty of centering adjustment in oxygen rifle installation can be greatly reduced in the device, be easy the mounting and adjusting of oxygen rifle, save manpower and work
When.But this method is that operation is adjusted in the case where converter does not produce, oxygen rifle is not deposited in addition to self gravity at this time
In side loading power, therefore in actual steelmaking process, this oxygen rifle Quick replacing device cannot guarantee that oxygen rifle in life
Centering effect during production.
A kind of converter oxygen gun of patent document replaces control method and system (publication number CN105567901A), the side automatically
Method, which specifically includes that, obtains the first oxygen rifle supplemental characteristic, the use state of the first oxygen rifle of real-time detection；When first oxygen rifle occurs
When abnormal, start oxygen rifle more changing device；Judge whether the position of first oxygen rifle is in center position；If it is not, then adjusting institute
The position for stating the first oxygen rifle makes first oxygen rifle be in center position；If so, promoting first oxygen rifle to default height
Degree；Second oxygen rifle is moved to center position, lowers second oxygen rifle by traversing first oxygen rifle and the second oxygen rifle；
Wherein, first oxygen rifle is the oxygen rifle in use state, and second oxygen rifle is the oxygen rifle in unused state.The hair
The converter oxygen gun of bright offer replaces control method and system automatically, realizes the monitoring and replacement of oxygen rifle, reduces work people
The working strength of member, while the more accurate failure to oxygen rifle judges, and can replace in time and use undesirable oxygen rifle.But
Be that the system is cumbersome, operate more complicated, though can the centering situation to oxygen rifle be monitored, improve equipment simultaneously
Cost has a certain impact to Reducing Cost in Enterprises.
A kind of installation method (publication number CN105755204A) of converter oxygen gun equipment of patent document, the invention provides one
The installation method of kind converter oxygen gun equipment, construction procedure include: the installation of one, guide rail；Two, support device is arranged；Three, oxygen lance
Group pair；Four, oxygen lance lifts.The present invention is the oxygen rifle lifting reserving hole using low-level platform, and Simple supporting device is arranged,
The offline assembling that oxygen lance is carried out under the support of its device forms after one and is integrally mounted directly to setting position with furnace roof driving
It sets.This method can reduce construction risk, improve work efficiency, and ensure that the progress of engineering construction.But oxygen rifle is set
Standby group does not ensure that oxygen rifle in the case that oxygen rifle is cooled water pipe side loading power in converter production process to step
Centering always.Therefore this method does not reach the requirement that oxygen rifle centering is also ensured in production process.
Patents documents show that in pneumatic steelmaking production process, current oxygen rifle centering mode does not consider reality
In STEELMAKING PRODUCTION operating process, the pipeline for being connected to oxygen rifle the same side is passed through side loading caused by water and gas, leads to oxygen rifle
The deflection of generation.Current so-called centering method is, by its concrete operations, to make oxygen rifle in the case where converter does not produce
Axis is overlapped with center line, therefore in practical steelmaking process, current oxygen rifle centering mode, not guaranteed converter refining
The real centering of oxygen rifle, will affect the normal production of converter when steel produces.Therefore the hanging position of oxygen rifle, it is necessary to consider in converter
It is deflected caused by side loading suffered by oxygen rifle in practical steelmaking process.The present invention is based on the adjustings of current oxygen rifle centering
Operating procedure, the status of oxygen rifle centering when guaranteed practical pneumatic steelmaking does not produce, but propose to consider practical STEELMAKING PRODUCTION
When oxygen rifle side loading, under the premise of STEELMAKING PRODUCTION does not carry out, oxygen rifle hanging position reserve in advance and center line deflection angle
Degree, and then guarantee in actual production in oxygen rifle pair, it is ensured that the normal production of pneumatic steelmaking reduces the generation of accident.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of method for preventing skidding of wheels of converter oxygen gun, avoid because cooling water pipe with
Oxygen rifle is vertical, and when being passed through cooling water, cooling water can generate certain impact in water inlet pipe and oxygen rifle interface to gun body, generates
One side loading power deflects oxygen rifle generation by a small margin, deviates centering center line.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of method for preventing skidding of wheels of converter oxygen gun reserves deflection angle theta to hanging oxygen rifle when production does not startB, offset production
The deflection angle that suffered cooling water side occurs to load force in the process, reaches the accurate centering of oxygen rifle in production process；Including
Following steps:
One, oxygen rifle load force F is determined
Oxygen rifle load force is determined in cooling water intake side, F value by formula (1):
In formula (1):
p1For oxygen rifle water inlet intraductal pressure；
V is cooling water flow；
v1For the flow velocity of water in oxygen rifle water inlet pipe；
v2For the flow velocity of water in oxygen rifle return pipe；
ξ is coefficient of partial resistance；
Two, the deflection angle that oxygen rifle occurs under load force effect is determined --- the reserved deflection of anti-bias hanging position oxygen rifle
Angle；
Oxygen rifle stress in production work meets beam stress deflection angle formulaCondition, with above-mentioned oxygen rifle institute
By load force opening relationships formula, oxygen rifle that you can get it reserves deflection angle thetaB, θBValue is determined by formula (2):
In formula (2):
EI is oxygen rifle material stiffness；
A be oxygen inlet junction flange between water inlet at a distance from；
B is water inlet and lower part card distance between plates；
L is the sum of a and b；
Three, deflection angle theta is reserved according to oxygen rifleB, determine the height difference H of oxygen rifle two sides snap-gauge, fixing chuck plate has oxygen rifle negative
The snap-gauge of the side of load is H lower than the snap-gauge of non-loaded side；H value is determined by formula (3):
H=Dsin θBFormula (3)
D is oxygen rifle outer tube outer diameter in formula (3).
Compared with prior art, the beneficial effects of the present invention are:
When a kind of anti-bias hanging production site of converter oxygen gun provided by the invention does not start, by giving oxygen rifle reserved deflection
Angle θB, so that it is counteracted the deflection angle occurred due to side loading power suffered in production process, reach in production process
Real centering effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of oxygen rifle.
Fig. 2 is oxygen rifle stress diagram.
Fig. 3 is that oxygen rifle hangs position view.
In figure: spray head 1, inner tube 2, middle pipe 3, outer tube 4, ring flange 5, water inlet pipe 6, return pipe 7, upper snap-gauge 8, lower card
Plate 9.
Specific embodiment
A specific embodiment of the invention is further illustrated with reference to the accompanying drawing:
Such as Fig. 1, oxygen rifle is connected on the body of a gun into return pipe, the water inlet pipe 6 of cooling water upper, return pipe 7 under,
Water inlet pipe 6 is connected with oxygen rifle middle tube 3, and return pipe 7 is connected with oxygen rifle outer tube 4, and oxygen lance is connected with oxygen rifle end.It is producing
When work, oxygen rifle is passed through oxygen and cooling water, since oxygen blast tube hub line is overlapped with oxygen rifle center line, when being passed through oxygen, and nothing
Side loading power will not make oxygen rifle that left and right vibration occur.But cooling water pipe is vertical with oxygen rifle, it is cooling when being passed through cooling water
Water can generate certain impact in water inlet pipe and oxygen rifle interface to gun body, generate a side loading power, generate oxygen rifle small
Amplitude deflection, deviates centering center line.
A kind of method for preventing skidding of wheels of converter oxygen gun reserves deflection angle theta to hanging oxygen rifle when production does not startB, offset production
The deflection angle that suffered cooling water side occurs to load force in the process, reaches the accurate centering of oxygen rifle in production process；Including
Following steps:
One, the size of oxygen rifle load force F is determined
According to law of conservation of energy, have
In above formula:
p1For oxygen rifle water inlet intraductal pressure, different model oxygen rifle, p1Value is different；
p2Enter in oxygen rifle middle tube the pressure for turning to critical point water for cooling water；
v1For the flow velocity of water in oxygen rifle water inlet pipe；
v2For the flow velocity of water in oxygen rifle return pipe；
hwFor energy loss caused by local resistance；
Z1Enter oxygen rifle inlet ground height for cooling water；
Z2Enter after oxygen rifle entrance for cooling water to oxygen gun body shock point position ground height, when calculating visual z1≈
z2。
That is:
Energy loss caused by local resistance againWherein: ξ obtains for coefficient of partial resistance:
Oxygen rifle load forceWherein: V is cooling water flow；v2For oxygen rifle return pipe water speed；
Two, the deflection angle that oxygen rifle occurs under load force effect is determined --- the reserved deflection of anti-bias hanging position oxygen rifle
Angle.
Such as Fig. 2, oxygen rifle stress in production work meets beam stress deflection angle formulaCondition, and it is above-mentioned
Oxygen rifle pressure opening relationships formula, oxygen rifle that you can get it reserve deflection angle:
Formula (2)
In formula (2): EI is oxygen rifle material stiffness, the oxygen rifle of unlike material, value difference；
A be oxygen inlet junction flange between water inlet at a distance from；
B is water inlet and lower part card distance between plates；
L is the sum of a and b；
Three, such as Fig. 3 determines that oxygen rifle reserves deflection angle thetaBAfterwards, when installing oxygen rifle, the two of snap-gauge 8 and lower snap-gauge 9 in change
The welding and assembling height of side snap-gauge keeps the snap-gauge of the loaded side of oxygen rifle connecting line H lower than non-loaded side snap-gauge；Realize institute
Hanging position and the pre- inclined angle of center line are θ when the oxygen rifle needed enters furnaceB。
H=Dsin θB
In formula: D is oxygen rifle outer tube outer diameter.
Embodiment
By taking 210t converter as an example, the high 9750mm of 210t Converter, the long 19988mm of oxygen rifle select oxygen supply intensity I=
3.41m3/ (tmin), Theoretical Design oxygen press p0=0.784MPa, outlet oxygen pressure is p=0.0981MPa, converter nominal tonnage G
=210t, oxygen inlet speed w=45m/s, oxygen rifle selection Q235, cooling water flow V=410t/h, external water inlet pipe diameter d
=200mm, water supply pressure p1=1MPa, out water speed v2=6.24m/s, oxygen rifle outer tube outer diameter D take 299mm, in which: a=
1m, b=2m, l=3m.
One, extension tube attached sectional area is found out
Two, each data are brought into reserved deflection angle formula
Three, oxygen rifle snap-gauge welding position is determined, snap-gauge and the snap-gauge of the lower loaded side of snap-gauge are than non-loaded in oxygen rifle
The low H of side snap-gauge；
H=DSin θB=0.299 × Sin1.5 ° of ≈ 7.8mm.
Described above is only basic principle of the invention, is not intended to limit the invention in any way, all right according to the present invention
It carries out equivalent variations and modification, within the scope of the art of this patent protection scheme.
Claims (1)
1. a kind of method for preventing skidding of wheels of converter oxygen gun, which is characterized in that when production does not start, reserve deflection angle theta to hanging oxygen rifleB,
Suffered cooling water side is offset in production process to the load force deflection angle that occurs, it is accurately right to reach oxygen rifle in production process
In；The following steps are included:
One, oxygen rifle load force F is determined
Oxygen rifle load force is determined in cooling water intake side, F value by formula (1):
In formula (1):
p1For oxygen rifle water inlet intraductal pressure；
V is cooling water flow；
v1For the flow velocity of water in oxygen rifle water inlet pipe；
v2For the flow velocity of water in oxygen rifle return pipe；
ξ is coefficient of partial resistance；
Two, determine load force effect under make oxygen rifle occur deflection angle --- anti-bias hanging position oxygen rifle reserves deflection angle；
Oxygen rifle stress in production work meets beam stress deflection angle formulaCondition is born with suffered by above-mentioned oxygen rifle
Power opening relationships formula is carried, oxygen rifle that you can get it reserves deflection angle thetaB, θBValue is determined by formula (2):
In formula (2):
EI is oxygen rifle material stiffness；
A be oxygen inlet junction flange between water inlet at a distance from；
B is water inlet and lower part card distance between plates；
L is the sum of a and b；
Three, deflection angle theta is reserved according to oxygen rifleB, determine the height difference H of oxygen rifle two sides snap-gauge, fixing chuck plate keeps oxygen rifle loaded
The snap-gauge of side is H lower than the snap-gauge of non-loaded side；H value is determined by formula (3):
H=Dsin θBFormula (3)
D is oxygen rifle outer tube outer diameter in formula (3).
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| CN201711089338.9A CN107641677B (en) | 2017-11-08 | 2017-11-08 | A kind of method for preventing skidding of wheels of converter oxygen gun |
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|---|---|---|---|
| CN201711089338.9A CN107641677B (en) | 2017-11-08 | 2017-11-08 | A kind of method for preventing skidding of wheels of converter oxygen gun |
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| CN107641677B true CN107641677B (en) | 2019-04-05 |
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| CN101570804A (en) * | 2008-05-04 | 2009-11-04 | 鞍钢股份有限公司 | Quick-change device for converter oxygen lance |
| CN102181599A (en) * | 2011-05-11 | 2011-09-14 | 中国十九冶集团有限公司 | Method for quickly and accurately centering offset oxygen lance of converter |
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| CN103409591A (en) * | 2013-08-23 | 2013-11-27 | 中国二十二冶集团有限公司 | Method for installing and centering oxygen lance as well as vaporized flue and converter mouth |
| CN104152626A (en) * | 2014-07-23 | 2014-11-19 | 王志敏 | Self-aligning rod-type oxygen lance quick replacing device |
| CN204224635U (en) * | 2014-11-14 | 2015-03-25 | 中冶南方工程技术有限公司 | A kind of cross sliding type sublance device |
| CN104551524A (en) * | 2014-12-31 | 2015-04-29 | 中冶东方工程技术有限公司 | Oxygen lance vertically maintaining method and device corresponding to same |
| CN105567901A (en) * | 2016-02-01 | 2016-05-11 | 莱芜钢铁集团电子有限公司 | Automatic replacement control method and system for oxygen lances of converter |
| CN105907918A (en) * | 2016-07-05 | 2016-08-31 | 中冶赛迪电气技术有限公司 | Control system and method for improving operation safety of converter oxygen lance |
| CN106834589A (en) * | 2015-12-04 | 2017-06-13 | 中冶宝钢技术服务有限公司 | Converter Maintenance method |
-
2017
- 2017-11-08 CN CN201711089338.9A patent/CN107641677B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570804A (en) * | 2008-05-04 | 2009-11-04 | 鞍钢股份有限公司 | Quick-change device for converter oxygen lance |
| CN102181599A (en) * | 2011-05-11 | 2011-09-14 | 中国十九冶集团有限公司 | Method for quickly and accurately centering offset oxygen lance of converter |
| CN102220450A (en) * | 2011-07-22 | 2011-10-19 | 武汉钢铁(集团)公司 | Automatic positioning and controlling method for oxygen lance of converter |
| CN103409591A (en) * | 2013-08-23 | 2013-11-27 | 中国二十二冶集团有限公司 | Method for installing and centering oxygen lance as well as vaporized flue and converter mouth |
| CN104152626A (en) * | 2014-07-23 | 2014-11-19 | 王志敏 | Self-aligning rod-type oxygen lance quick replacing device |
| CN204224635U (en) * | 2014-11-14 | 2015-03-25 | 中冶南方工程技术有限公司 | A kind of cross sliding type sublance device |
| CN104551524A (en) * | 2014-12-31 | 2015-04-29 | 中冶东方工程技术有限公司 | Oxygen lance vertically maintaining method and device corresponding to same |
| CN106834589A (en) * | 2015-12-04 | 2017-06-13 | 中冶宝钢技术服务有限公司 | Converter Maintenance method |
| CN105567901A (en) * | 2016-02-01 | 2016-05-11 | 莱芜钢铁集团电子有限公司 | Automatic replacement control method and system for oxygen lances of converter |
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| CN107641677A (en) | 2018-01-30 |
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