CN104988284B - Vacuum tank rubber seal ring protection method and molten steel vacuum refining method thereof - Google Patents
Vacuum tank rubber seal ring protection method and molten steel vacuum refining method thereof Download PDFInfo
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- CN104988284B CN104988284B CN201510291609.3A CN201510291609A CN104988284B CN 104988284 B CN104988284 B CN 104988284B CN 201510291609 A CN201510291609 A CN 201510291609A CN 104988284 B CN104988284 B CN 104988284B
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Abstract
The invention discloses a vacuum tank rubber seal ring protection method. The method is characterized in that a vacuum tank rubber seal ring protection mechanism is arranged on an operation platform of a molten steel VD vacuum refining furnace in advance, the vacuum tank rubber seal ring protection mechanism comprises a slag stop board horizontally arranged below a vacuum tank cover vehicle of the operation platform, the slag stop board is higher than a pouring port of a vacuum tank, and a telescopic device is arranged at the side, away from the corresponding vacuum tank, of the slag stop board; in the steel making technological process, when a vacuum tank cover moves, the telescopic device is started, and the slag stop board is driven to stretch forwards to shield the position above a rubber seal ring for protection. The invention further discloses a molten steel vacuum refining method adopting the vacuum tank rubber seal ring protection method. By the adoption of the vacuum tank rubber seal ring protection method and the molten steel vacuum refining method, the seal ring can be well protected, the molten steel refining efficiency and effect can be improved, and the refining furnace has the beneficial effects that the structure is compact, covering operation control is convenient, operation stability is good, work efficiency is high, and service life is long.
Description
Technical field
The present invention relates to a kind of steel-making vd refining techniques, more particularly, to a kind of vacuum tank rubber seal guard method and its
Vacuum refining method of molten steel.
Background technology
Steel-making vd refining techniques, is a kind of technique adopting vd stove in the way of evacuation, carrying out refine to molten steel.Vd stove
Also known as vd type ladle refining furnace, it is capable of Argon, oxygen blast, decarburization, vacuum outgass, alloying component fine setting under vacuum under vacuo
Deng operation；Molten steel can be carried out with alloying component fine setting under general Fruit storage and vacuum.Its work process, generally comprises
Open vacuum container cover and hang in ladle, connect argon-blowing device Argon, thermometric samples, and covers vacuum container cover and evacuation is processed
(oxygen blast when being necessary), opens vacuum container cover after being disposed, thermometric samples and determines hydrogen and determines oxygen again, is carried out according to testing result
Feed silk (adding the adjusting components such as aluminium wire, silico-calcium silk) adjustment, stop Argon, complete refine and hang out ladle.
China's patent No. 201220444104.8 once disclosed a kind of simple and practical vd refining furnace, but belonged to single-station knot
Structure, work efficiency is relatively low.
China's patent No. zl201120423331.8 once disclosed a kind of double tank body vd vacuum drying oven of single cover, including power supply electricity
Source, operating platform, tank body, cover, cover car, vacuum pump system, hydraulic system, cooling system, cleaner unit, argon blowing system, institute
The tank body said is two, shares a cover, and two tank bodies are separately positioned on cover both sides, and operating platform is provided with track, road
Rail is provided with cover car, and cover is arranged on cover car, can move back and forth along track.In foregoing invention, devise two tank bodies
Share cover and form double, when a tank body carries out application of vacuum, another tank body can carry out thermometric, feed silk,
Determine oxygen, determine the operation such as hydrogen, save preparation time, two station alternately operatings compared with single-station vd stove, it is possible to increase
Efficiency.
But this existing Double-station type vd stove technology, however it remains following defect: 1, not section of vd stove integral structure layout
Learn, be unfavorable for manipulating and occupation of land space is larger.2nd, cover bassinet structure is simpler, be unfavorable for the closing lid to cover and open wait grasp
Make.3rd, pumped vacuum systems is the wet type pumped vacuum systems using steam jet pump, but structure is excessively complicated, is unfavorable for manipulating, dirty
Water treatment system floor space is big.4th, higher to steam needs, system energy consumption is high.5th, whole process control procedure need into
One-step optimization, with improve production efficiency, improves control stability, extension device life-span.
Content of the invention
For above-mentioned the deficiencies in the prior art, the technical problem to be solved is: how to provide a kind of vacuum tank
Rubber seal guard method and its vacuum refining method of molten steel are so as to be capable of the good protection to sealing ring, Neng Gouti
High liquid steel refining efficiency and effect.
In order to solve above-mentioned technical problem, present invention employs following technical scheme:
A kind of vacuum tank rubber seal guard method is it is characterised in that operating platform in molten steel vd vacuum refining furnace
The upper vacuum tank sealing ring protection mechanism that following structure is first set, described vacuum tank sealing ring protection mechanism, set including a level
Put on the operational platform below vacuum container cover car and the slag trap above vacuum tank tank mouth height, the shifting of Splashproof cover in vacuum tank
The projection vertically of dynamic path drops in the width range of slag trap, and slag trap is away from the side setting of corresponding vacuum tank
There is retractor device, the expansion link telescopic direction of retractor device is consistent with Splashproof cover mobile route direction, and expansion link front end is connected to
On slag trap and pushing off the slag front edge of board can be driven to stretch out be covered in above corresponding vacuum tank tank mouth sides adjacent；
During process for making, when vacuum tank application of vacuum terminates, in vacuum tank, vacuum breaker, to recovering normal pressure, lifts vacuum
Cover, to upper limit, then starts retractor device, drives slag trap to forward extend out and covers in above rubber seal, anti-to stop
Splash the high-temperature steel slag covering and drop and burn out rubber seal in seal groove；After the mobile extremely standby station of vacuum container cover car, slag trap
Reset；Vacuum container cover car will travel to producing before station simultaneously, and also first slag trap to be started shelters from rubber seal, until true
After slack tank lid garage sails to production station, pushing off the slag sheet reset, vacuum container cover falls after completing sealing and proceeds by application of vacuum.
So the protection to vacuum tank rubber seal is capable of using this method, need not be using cooling water conservation sealing
Circle, it can be avoided that cooling water produces steam to damage dry vacuum system, simultaneously good to sealing ring protection effect, ensure that close
Seal sealing and service life.
The invention also discloses a kind of vacuum refining method of molten steel is it is characterised in that first obtain the molten steel vd of following structure
Vacuum refining furnace, this refining furnace includes two vacuum tanks of spacing parallel arranging setting, is provided with argon-blowing device and tank in vacuum tank
Internal gas pressure detection probe, also includes being horizontally placed on the operating platform of vacuum tank tank mouth height and position, operating platform also sets up
There is vacuum container cover car, the roller cooperation below vacuum container cover car is mounted on the vacuum tank of two vacuum tank external side parallel settings
On lid car guide rail, below vacuum container cover car, it is connected with vacuum container cover, vacuum container cover includes above and is used for and vacuum
Tank is installed the enclosing cover of cooperation and is hung at the Splashproof cover being used for below enclosing cover with ladle cooperation, and it is close that vacuum tank tank mouth is provided with a circle
Sealing groove, is provided with rubber seal, also includes pumped vacuum systems in seal groove, described pumped vacuum systems includes two evacuation and props up
Pipeline, one end of two evacuation branch pipe(tube)s connects with the sealing of corresponding vacuum tank respectively, and the other end is connected to by threeway and takes out
Vacuum main road is connected to vacuum pump system, and two evacuation branch pipe(tube)s are respectively provided with a vacuum main valve；Described operation
It is set up in molten steel by installing rack below platform to melt down above line, and operating platform and molten steel melt down to leave between line and lead to for ladle
The space crossed；Searchlight for illuminating to molten steel is additionally provided with vacuum container cover；
During steel-making, molten steel melts down line guide rail by molten steel in ladle and is transported to operating platform one side-lower, then by steel
Bag hangs in the vacuum tank treating work state, connects argon-blowing device to ladle argon-blown and thermometric samples；Close this vacuum tank correspondence to take out
Vacuum main valve on vacuum manifold road, simultaneously need to closing the vacuum main valve on another evacuation branch pipe(tube), then starts vacuum
Pumping system carries out forvacuum；Exhaust after finishing in advance, vacuum container cover car is true to this from the standby station movement between two vacuum tanks
Production station above slack tank, vacuum container cover is covered this vacuum tank, and the vacuum main valve opened on corresponding evacuation branch pipe(tube) is taken out
Vacuum carries out refining treatment；Open vacuum container cover after being disposed, vacuum container cover car returns standby station, again thermometric, sampling,
Determine hydrogen, determine oxygen and determine the hydrogen-oxygen content of molten steel, require to feed silk adjusting component according to molten steel composition, finally stop Argon and hang out
Ladle, the vacuum refining of liquid steel completing single-station is processed；In this processing procedure after vacuum container cover car returns standby station, that is, same
When start another station according to above-mentioned steps flow process vacuum refining of liquid steel process, realize double alternate cycles process；
In above-mentioned steelmaking process, employ method as above and vacuum tank rubber seal is protected.
So, vd stove is crossed on molten steel and melts down above line, its own does not interfere with the normal use that molten steel melts down line, with
When can melt down, by molten steel, the conveying that line carries out ladle, thus dramatically saves on floor space so that STEELMAKING PRODUCTION line
Integral layout more compact and reasonable, saves device layout cost.
Meanwhile, this method not only shares a set of vacuum container cover and pumped vacuum systems, saves component cost, and one
When individual station carries out the process step after evacuation finishes, another station can first carry out forvacuum process, and shortening is taken out
Vacuum entirety required time, the time that significantly reduces saves consumption, improves work efficiency.
As optimization, it is in flat car body that vacuum container cover car includes overall appearance, and car body four end has downward support
Arm is simultaneously connected on vacuum container cover car guide rail in support arm lower end installation roller, and car body lower surface side interval is provided with two
Individual hydraulic cylinder, hydraulic cylinder extension arm arranges inwards and is connected with two chains in telescopic arm front end, and two chain front ends are each forward
From bypass two fixed pulleys that time interval is arranged on car body backward under be connected on vacuum container cover, described two hydraulic cylinders
Hydraulic Station is arranged on car body upper surface.
So, when needing to close vacuum container cover, vacuum container cover car only need to be controlled to run to the corresponding vacuum producing station
Above tank, its telescopic arm is controlled to stretch out by hydraulic cylinder, vacuum container cover leans on gravity gradually descending and drops into vacuum tank tank mouth and sets
In the seal groove put, complete sealing by rubber seal and close；When needing to open vacuum container cover, only need Reverse Turning Control hydraulic cylinder
Telescopic arm is retracted, you can realize the lifting to vacuum container cover by chain, completes to open.
Further, four chains junction point on vacuum container cover is uniformly distributed along annular around vacuum container cover axial line,
It is beneficial to holding balance, improve manipulation stability.
As optimization, described hydraulic cylinder rear end is hinged on car body by horizontally disposed hinge, before hydraulic cylinder extension arm
End connects two chains by an adaptor, and adaptor lower end coordinates on a horizontal sliding table horizontally slidablely.So,
It is more favorable for improving the stability that hydraulic cylinder controls vacuum container cover.
Further, adaptor one end bottom directly connects with a chain, and this end top is horizontally disposed by one
Connecting rod and another chain connect, and so can preferably improve structural stability, improve control stability.
As optimization, described car body is also fixedly installed fairlead straight down, in fairlead, is equipped with guiding
Post, lead lower end is fixed on vacuum container cover straight down.So, fairlead and lead constitute guiding mechanism, control true
Slack tank lid move up and down direction accuracy it is ensured that closing process accurately and reliably.
As optimization, described operating platform is integrally t-shaped, and its wider side two ends arranges two vacuum tanks, narrower
It is provided with operating room above side.
So, operating room is set, can conveniently realize the electrical control to refining process.So that operating platform is had simultaneously
Simple and compact for structure, the feature of save space.
As optimization, described slag trap is the corresponding consistent arcuate structure of radian with the vacuum tank tank mouth of adjacent side.This
Sample, only need to move a little distance can block sealing ring just, the movement of Splashproof cover will not be caused to hinder simultaneously.
As optimization, described slag trap lower end both sides are provided with roller, and roller rolls cooperation and supports edge on the operational platform
On the guide rail of mobile route direction setting of Splashproof cover.As such, it is possible to the convenient supporting to slag trap and control are moved.
As optimization, described slag trap is obtained for decorative pattern Steel material.So, slag trap surface roughness is high, facilitates workman
Standing operation, is difficult to fall down.
As optimization, described retractor device has two sets and is respectively disposed at slag trap away from the side of corresponding vacuum tank
End positions.So, retractor device force is made more to balance, work process is more reliable.
As optimization, described retractor device adopts cylinder.So there is structure simple, with low cost, equivalent beneficial to controlling
Really.
Further, it is provided with cylinder protective cover above cylinder, preferably to protect cylinder.
As optimization, in pumped vacuum systems, evacuation main pipeline is also connected be provided with cooler and defecator.
So, cooler can cool down to the gas extracted out, and defecator can filter out the ash in gas bleeding
Dirt, it is to avoid gas bleeding temperature is too high or inclusion of dirt causes to vacuum pump to damage it is ensured that vacuum pump job stability, prolongs
Long service life of vacuum pump.
Further, on evacuation branch pipe(tube), also it has been arranged in parallel internal diameter positioned at vacuum main valve side and has been less than evacuation and propped up
The by-pass line of internal diameter of the pipeline, described by-pass line is also equipped with bypass pipe switching control pilot.
So, in pumped vacuum systems, it is provided with by-pass line, when closing vacuum main valve carries out pre- taking out, it is right to simultaneously close off
The bypass pipe switching control pilot answered, exhausts in advance and (stops when being typically evacuated in advance about vacuum main road internal gas pressure 67 handkerchief) after finishing, first
Open bypass pipe switching control pilot so that the evacuation branch pipe(tube) of vacuum main valve rear and front end can first pass through the bypass of minor diameter
The preliminary connection of pipeline carry out pressure release so that before and after vacuum main valve pipeline upward pressure close to balance when, then open vacuum main valve, close
Bypass pipe switching control pilot, carries out evacuation.So because by-pass line internal diameter is less, rear and front end will not be caused during pressure release
Excessive impact and fluctuation.Pressure release opens vacuum main valve (a when will not be excessive to the pressure differential of vacuum main valve rear and front end position again
As pressure release to vacuum tank intrinsic pressure strong be 30 kPas, venting duration is the 90-120 second, ensure that pressure leak process and subsequently opens
The stablizing of vacuum main valve process), two ends will not form moment excessive pressure differential, does not result in big pressure oscillation.And then keep away
Exempt from the influence of fluctuations of vacuum main valve two ends air pressure impact, prevent slag steel expulsion events it is ensured that defecator and vacuum
The using effect of pumping system and service life.
Further, it is additionally provided with pipeline air pressure detection probe, described pipeline air pressure detection probe in evacuation main pipeline
And tank internal gas pressure detection probe all with controller in vacuum tank is connected, described vacuum main valve and bypass pipe switching control pilot
It is solenoid electric valve, described controller is electrically connected with the electric control part module of vacuum main valve and bypass pipe switching control pilot respectively
Connect.Controller is arranged at operating room to facilitate operational control.
So, above-mentioned control process can be realized electrification and automatically controls.Ensure to control accurately timely, raising evacuation effect
Really.
Further, described by-pass line is additionally provided with a bypass pipe circulation control valve.As such, it is possible to by bypass
Pipe flow flux control valve controls to adjust the ventilation flow rate of by-pass line it is ensured that not result in the pressure differential of moment during pressure release excessive,
Pressure release is avoided to cause to fluctuate.
In sum, the present invention is capable of the good protection to sealing ring, it is possible to increase liquid steel refining efficiency and effect,
There is refining furnace compact conformation, scientific arrangement, occupation of land space is little simultaneously, facilitate cover operational control, pumped vacuum systems structure is closed
Reason, manipulates the advantages of good stability, high working efficiency and long service life.
Brief description
Fig. 1 is that (in figure does not show for the structural representation of molten steel vd vacuum refining furnace overlook direction in specific embodiment
Vacuum tank sealing ring protection mechanism and vacuum pump system structure).
Fig. 2 is Fig. 1 sectional view.
Fig. 3 is the structural representation of the vacuum tank sealing ring protection mechanism of molten steel vd vacuum refining furnace in specific embodiment
Figure.
Fig. 4 is the top view of Fig. 3.
Specific embodiment
With reference to a kind of molten steel vd vacuum refining furnace and its be embodied as work process to the present invention make further detailed
Describe in detail bright.
Specific embodiment, as Figure 1-4, when the present invention is implemented, needs first to obtain a kind of molten steel vd vacuum refining furnace,
Its structure includes two vacuum tanks 1 of spacing parallel arranging setting, is provided with argon-blowing device and the detection of tank internal gas pressure is visited in vacuum tank 1
Head, also includes being horizontally placed on the operating platform 2 of vacuum tank tank mouth height and position, operating platform 2 is additionally provided with vacuum container cover
Car, the roller cooperation below vacuum container cover car is mounted on the vacuum container cover car guide rail 3 of two vacuum tank external side parallel settings
On, it is connected with vacuum container cover 4 below vacuum container cover car, vacuum container cover 4 includes above and is used for and vacuum tank installation
The enclosing cover coordinating is provided with a circle and seals with being hung at the Splashproof cover 5 being used for below enclosing cover with ladle cooperation, vacuum tank 1 tank mouth
Groove, is provided with rubber seal, also includes pumped vacuum systems in seal groove, described pumped vacuum systems includes two evacuation arms
Road 6, one end of two evacuation branch pipe(tube)s 6 connects with the sealing of corresponding vacuum tank respectively, and the other end is connected to by threeway and takes out
Vacuum main road 7 is connected to vacuum pump system, and two evacuation branch pipe(tube)s 6 are respectively provided with a vacuum main valve 8；Wherein,
Described operating platform 2 lower section is set up in molten steel by installing rack and melts down above line guide rail 9, and operating platform 2 and molten steel melt down line
The space passed through for ladle 10 is left between guide rail 9.Wherein, vacuum container cover 4 is additionally provided with the searchlighting for illuminating to molten steel
Lamp and the photographic head for imaging to molten steel.
In the present invention, vd stove is crossed on molten steel and melts down above line, its own does not interfere with molten steel and melts down normally making of line
With can melt down, by molten steel, the conveying that line carries out ladle, thus dramatically saves on floor space so that steel-making is given birth to simultaneously
Producing line integral layout more compact and reasonable, saves device layout cost.
In steel-making, molten steel melts down line guide rail by molten steel in ladle and is transported under operating platform side this Sample Method
Then ladle is hung in the vacuum tank treating work state by side, connects argon-blowing device to ladle argon-blown and thermometric samples；Close this true
Vacuum main valve on the corresponding evacuation branch pipe(tube) of slack tank, simultaneously need to close the vacuum main valve on another evacuation branch pipe(tube), so
Start vacuum pump system afterwards and carry out forvacuum；Exhaust after finishing in advance, by standby station between two vacuum tanks for the vacuum container cover car
The mobile production station to above this vacuum tank, vacuum container cover is covered this vacuum tank, opens on corresponding evacuation branch pipe(tube)
Vacuum main valve evacuation carries out refining treatment；Vacuum container cover is opened, vacuum container cover car returns standby station, again after being disposed
Thermometric, sampling, determine hydrogen, determine oxygen and determine the hydrogen-oxygen content of molten steel, require to feed silk adjusting component according to molten steel composition, finally stop
Argon simultaneously hangs out ladle, and the vacuum refining of liquid steel completing single-station is processed；Return standby in this processing procedure in vacuum container cover car
After station, that is, start simultaneously at another station and process according to the vacuum refining of liquid steel of above-mentioned steps flow process, realize duplexing bit interleaving and follow
Ring is processed.So not only share a set of vacuum container cover and pumped vacuum systems, save component cost, and enter in a station
Row evacuation finish after process step when, another station can first carry out forvacuum process, shortens evacuation overall
Required time, the time that significantly reduces saves consumption, improves work efficiency.
Wherein, vacuum container cover car includes overall appearance is in flat car body 11, and car body 11 4 end has downward support
Arm 12 is simultaneously connected on vacuum container cover car guide rail 3 in support arm lower end installation roller, car body 11 lower surface side interval peace
Equipped with two hydraulic cylinders 13, hydraulic cylinder extension arm arranges inwards and is connected with two chains 14, two chains in telescopic arm front end
14 front ends each bypass forward two fixed pulleys that time interval is arranged on car body backward under be connected on vacuum container cover 4, institute
The Hydraulic Station 15 stating two hydraulic cylinders 13 is arranged on car body 11 upper surface.
So, when needing to close vacuum container cover, vacuum container cover car only need to be controlled to run to the corresponding vacuum producing station
Above tank, its telescopic arm is controlled to stretch out by hydraulic cylinder, vacuum container cover leans on gravity gradually descending and drops into vacuum tank tank mouth and sets
In the seal groove put, complete sealing by rubber seal and close；When needing to open vacuum container cover, only need Reverse Turning Control hydraulic cylinder
Telescopic arm is retracted, you can realize the lifting to vacuum container cover by chain, completes to open.
Wherein, four chains 14 junction point on vacuum container cover is uniformly distributed along annular around vacuum container cover axial line, with
Beneficial to keeping balance, improve manipulation stability.
Wherein, described hydraulic cylinder 13 rear end is hinged on car body 11 by horizontally disposed hinge, before hydraulic cylinder extension arm
End connects two chains 14 by an adaptor, and adaptor lower end coordinates on a horizontal sliding table horizontally slidablely.This
Sample, is more favorable for improving the stability that hydraulic cylinder controls vacuum container cover.
Wherein, adaptor one end bottom directly connects with a chain, and a horizontally disposed connection is passed through on this end top
Bar 16 and another chain connect, and so can preferably improve structural stability, improve control stability.
Wherein, described car body 11 is also fixedly installed fairlead 17 straight down, is equipped with fairlead 17 and leads
To post 18, lead 18 lower end is fixed on vacuum container cover straight down.So, fairlead and lead constitute guiding mechanism,
Control vacuum container cover move up and down direction accuracy it is ensured that closing process accurately and reliably.
Wherein, described operating platform 2 is overall t-shaped, and its wider side two ends arranges two vacuum tanks 1, narrower by one
It is provided with operating room 19 above side.
So, operating room is set, can conveniently realize the electrical control to refining process.So that operating platform is had simultaneously
Simple and compact for structure, the feature of save space.
Wherein, on operating platform 2, vacuum tank underlying surfaces are additionally provided with thermal insulation layer, with the ladle high temperature preventing lower section from passing through
Impact to vacuum tank is it is ensured that the normal of vacuum tank uses and service life.
Wherein, described operating platform 2 is additionally provided with vacuum tank sealing ring protection mechanism, is horizontally set on operation including one
Slag trap 23 below vacuum container cover car on platform and above vacuum tank tank mouth height, the mobile route of Splashproof cover in vacuum tank
Projection vertically drops in the width range of slag trap, and slag trap is provided with flexible away from the side corresponding to vacuum tank
Device 25, the expansion link telescopic direction of retractor device 25 is consistent with Splashproof cover mobile route direction, and expansion link front end is connected to gear
On slag plate 23 and slag trap 23 front end can be driven to stretch out be covered in above corresponding vacuum tank tank mouth sides adjacent.
Because this vd furnace structure is using dry-type vacuum pumping system, in order to reduce vapor, vacuum pump is hindered and damaged,
It is not provided with cooling water in vacuum tank Jar opening sealer groove, therefore need using above-mentioned protection mechanism, the rubber seal in seal groove to be entered
Row protection.After arranging above-mentioned protection mechanism, in actual production, when vacuum tank application of vacuum terminates, in vacuum tank, vacuum breaker is extremely
Recover normal pressure, lifting vacuum container cover 4 to upper limit, then start retractor device, drive slag trap to forward extend out and cover in rubber
Above sealing ring, burn out rubber seal to stop the high-temperature steel slag on Splashproof cover from dropping in seal groove.Vacuum container cover car moves
To standby station, pushing off the slag sheet reset.Or vacuum container cover car will travel to producing before station, also first slag trap to be started shelters from
Rubber seal, until after vacuum container cover garage sails to production station, pushing off the slag sheet reset, vacuum container cover falls and proceeds by vacuum
Process.Thus cooling water conservation sealing ring need not be adopted, it can be avoided that cooling water produces steam to damage dry vacuum system,
Simultaneously good to sealing ring protection effect, ensure that sealing ring tightness and service life.
Wherein, described slag trap 23 is the corresponding consistent arcuate structure of radian with the vacuum tank tank mouth of adjacent side.So,
Only a little distance need to be moved can block sealing ring just, the movement of Splashproof cover will not be caused to hinder simultaneously.
Wherein, described slag trap 23 lower end both sides are provided with roller 26, and roller 26 rolls cooperation and supports on the operational platform
Along along the guide rail 27 of the mobile route direction setting of Splashproof cover.As such, it is possible to the convenient supporting to slag trap and control are moved.
Wherein, described slag trap 23 is obtained for decorative pattern Steel material.So, slag trap surface roughness is high, facilitates workman to stand
Vertical operation, is difficult to fall down.
Wherein, described retractor device 25 has two sets and is respectively disposed at slag trap away from the side of corresponding vacuum tank 1
End positions.So, retractor device force is made more to balance, work process is more reliable.
Wherein, described retractor device 25 adopts cylinder.So there is structure simple, with low cost, beneficial to control and other effects.
Wherein, it is provided with cylinder protective cover 28 above cylinder, preferably to protect cylinder.
Wherein, in pumped vacuum systems, evacuation main pipeline 7 is also connected be provided with cooler 29 and defecator (not
Display).
So, cooler can cool down to the gas extracted out, and defecator can filter out the ash in gas bleeding
Dirt (typically adopt sack cleaner), it is to avoid gas bleeding temperature is too high or inclusion of dirt causes to vacuum pump to damage, and protects
Card vacuum pump job stability, extends service life of vacuum pump.
Wherein, on evacuation branch pipe(tube) 6, also it has been arranged in parallel internal diameter positioned at vacuum main valve side and has been less than evacuation branch pipe(tube)
The by-pass line 30 of internal diameter, described by-pass line 30 is also equipped with bypass pipe switching control pilot 31.
So, in pumped vacuum systems, it is provided with by-pass line, when closing vacuum main valve carries out pre- taking out, it is right to simultaneously close off
The bypass pipe switching control pilot answered, exhausts in advance and (stops when being typically evacuated in advance about vacuum main road internal gas pressure 67 handkerchief) after finishing, first
Open bypass pipe switching control pilot so that the evacuation branch pipe(tube) of vacuum main valve rear and front end can first pass through the bypass of minor diameter
The preliminary connection of pipeline carry out pressure release so that before and after vacuum main valve pipeline upward pressure close to balance when, then open vacuum main valve, close
Bypass pipe switching control pilot, carries out evacuation.So because by-pass line internal diameter is less, rear and front end will not be caused during pressure release
Excessive impact and fluctuation.Pressure release opens vacuum main valve (a when will not be excessive to the pressure differential of vacuum main valve rear and front end position again
As pressure release to vacuum tank intrinsic pressure strong be 30 kPas, venting duration is the 90-120 second, ensure that pressure leak process and subsequently opens
The stablizing of vacuum main valve process), two ends will not form moment excessive pressure differential, does not result in big pressure oscillation.And then keep away
Exempt from the influence of fluctuations of vacuum main valve two ends air pressure impact, prevent slag steel expulsion events it is ensured that defecator and vacuum
The using effect of pumping system and service life.
Wherein, be additionally provided with pipeline air pressure detection probe in evacuation main pipeline 7, described pipeline air pressure detection probe and
Tank internal gas pressure detection probe all with one controller 32 in vacuum tank is connected, and described vacuum main valve and bypass pipe switching control pilot are equal
For solenoid electric valve, the electric control part module electrical connection with vacuum main valve and bypass pipe switching control pilot respectively of described controller.
Controller is arranged at operating room 19 to facilitate operational control.
So, above-mentioned control process can be realized electrification and automatically controls.Ensure to control accurately timely, raising evacuation effect
Really.
Wherein, described by-pass line 30 is additionally provided with a bypass pipe circulation control valve (not shown).As such, it is possible to
Control to adjust the ventilation flow rate of by-pass line by the bypass pipe control valve that circulates it is ensured that not resulting in the pressure differential of moment during pressure release
Excessive, it is to avoid pressure release causes to fluctuate.
Claims (2)
1. a kind of vacuum tank rubber seal guard method is it is characterised in that on the operating platform of molten steel vd vacuum refining furnace
The vacuum tank sealing ring protection mechanism of following structure, described vacuum tank sealing ring protection mechanism are first set, are horizontally disposed with including one
On the operational platform below vacuum container cover car and the slag trap above vacuum tank tank mouth height, the movement of Splashproof cover in vacuum tank
Path projection vertically drops in the width range of slag trap, and slag trap is provided with away from the side of corresponding vacuum tank
Retractor device, the expansion link telescopic direction of retractor device is consistent with Splashproof cover mobile route direction, and expansion link front end is connected to gear
On slag plate and pushing off the slag front edge of board can be driven to stretch out be covered in above corresponding vacuum tank tank mouth sides adjacent；
During process for making, when vacuum tank application of vacuum terminates, in vacuum tank, vacuum breaker, to recovering normal pressure, lifts vacuum container cover
To upper limit, then start retractor device, drive slag trap to forward extend out and cover in above rubber seal, to stop Splashproof cover
On high-temperature steel slag drop and burn out rubber seal in seal groove；After the mobile extremely standby station of vacuum container cover car, pushing off the slag sheet reset；
Vacuum container cover car will travel to producing before station simultaneously, and also first slag trap to be started shelters from rubber seal, until vacuum tank
After lid garage sails to production station, pushing off the slag sheet reset, vacuum container cover falls after completing sealing and proceeds by application of vacuum.
2. a kind of vacuum refining method of molten steel is it is characterised in that first obtain the molten steel vd vacuum refining furnace of following structure, this refine
Stove includes two vacuum tanks of spacing parallel arranging setting, is provided with argon-blowing device and tank internal gas pressure detection probe in vacuum tank, also
Including the operating platform being horizontally placed on vacuum tank tank mouth height and position, operating platform is additionally provided with vacuum container cover car, vacuum
Roller cooperation below cover car is mounted on the vacuum container cover car guide rail of two vacuum tank external side parallel settings, vacuum tank
Be connected with vacuum container cover below lid car, vacuum container cover include above and for and vacuum tank install cooperation enclosing cover and
It is hung at the Splashproof cover being used for below enclosing cover with ladle cooperation, vacuum tank tank mouth is provided with a circle seal groove, setting in seal groove
There is rubber seal, also include pumped vacuum systems, described pumped vacuum systems includes two evacuation branch pipe(tube)s, two evacuation prop up
One end of pipeline connects with the sealing of corresponding vacuum tank respectively, and the other end is connected to evacuation main pipeline by threeway and is connected to
Vacuum pump system, two evacuation branch pipe(tube)s are respectively provided with a vacuum main valve；Pass through installing rack below described operating platform
It is set up in molten steel to melt down above line, and operating platform and molten steel melt down and leave the space passed through for ladle between line；Vacuum container cover
On be additionally provided with searchlight for illuminating to molten steel；
During steel-making, molten steel melts down line guide rail by molten steel in ladle and is transported to operating platform one side-lower, then hangs ladle
Enter to treat in the vacuum tank of work state, connect argon-blowing device to ladle argon-blown and thermometric samples；Close this vacuum tank and correspond to evacuation
Vacuum main valve on branch pipe(tube), simultaneously need to closing the vacuum main valve on another evacuation branch pipe(tube), then starts vacuum pump system
System carries out forvacuum；Exhaust after finishing in advance, by vacuum container cover car from the standby station movement between two vacuum tanks to this vacuum tank
The production station of top, vacuum container cover is covered this vacuum tank, opens the vacuum main valve evacuation on corresponding evacuation branch pipe(tube)
Carry out refining treatment；Vacuum container cover is opened, vacuum container cover car returns standby station, again thermometric, sampling, calmly after being disposed
Hydrogen, determine oxygen and determine the hydrogen-oxygen content of molten steel, require to feed silk adjusting component according to molten steel composition, finally stop Argon and hang out steel
Bag, the vacuum refining of liquid steel completing single-station is processed；In this processing procedure after vacuum container cover car returns standby station, that is, simultaneously
Start another station to process according to the vacuum refining of liquid steel of above-mentioned steps flow process, realize double alternate cycles and process；
In above-mentioned steelmaking process, the method described in claim 1 that employs is protected to vacuum tank rubber seal.
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