CN107604297A - Wall-jets sealing stable-pressure device and its application method in a kind of galvanized steel alloying process - Google Patents
Wall-jets sealing stable-pressure device and its application method in a kind of galvanized steel alloying process Download PDFInfo
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- CN107604297A CN107604297A CN201711014182.8A CN201711014182A CN107604297A CN 107604297 A CN107604297 A CN 107604297A CN 201711014182 A CN201711014182 A CN 201711014182A CN 107604297 A CN107604297 A CN 107604297A
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Abstract
The present invention relates to wall-jets sealing stable-pressure device and its application method in a kind of galvanized steel alloying process.The device is mainly by bellows, nozzle, mobile side board, spoiler, stud, sliding way, glide path etc. forms, when mobile side board is in closure state, spoiler is held up the level of by the stud being fixedly connected on mobile side board, at this moment the distance W between spoiler end and galvanized steel is 30~60mm, reduce the Involving velocity on the downside of free jet, when mobile side board distinguishes upward slideway, when the movement of glide path both ends is opened, spoiler is turned on one's side in plumbness under gravity, now the distance between spoiler plane and galvanized steel is equal to the distance between nozzle and galvanized steel.The present invention can effectively hinder the thermal current of galvanized steel soaking zone to rise, and the thermal requirements of galvanized steel soaking zone are realized on the basis of hot-dip galvanized steel strip surface quality is not influenceed.
Description
Technical field
Penetrated the invention belongs to adherent in galvanized steel heat preservation technology field, more particularly to a kind of galvanized steel alloying process
Stream sealing stable-pressure device and its application method.
Background technology
Hot-dip galvanizing sheet steel is because of its relatively low production cost, preferable decay resistance, coating performance, welding performance and anti-impact
Performance is hit, the high-grade galvanizing product consumption industry such as automobile, household electrical appliances is highly suitable to be applied for, disclosure satisfy that user is high-quality to product
The quality requirement of surface characteristic and good internal performance.The hot-dip galvanized steel strip exported from zinc pot is usually required in alloying furnace
Multistage heat treatment is completed, in the practice of substantial amounts of produced on-site, existing difficulties are hot-dip galvanized steel strip in alloying furnace
The stability requirement of bringing-up section, soaking zone and alloying reaction temperature needed for cooling section is higher, slightly deviation can not just obtain compared with
Good alloying layer and good anti-powdering characteristic.
At present, the alloying furnace in commercial Application uses vertical form more, and stove is located at directly over air knife.Along air knife
Bottom-heated section, middle part soaking zone and top cooling section are respectively disposed with upward direction, every section of temperature is required for following alloy
Change process curve and rate request (i.e. soaking time).Traditional middle part soaking zone uses all-sealed structure, only both ends open more
Make strip by being provided with electromagnetic induction or thermal resistance heater inside it, for the insulation of strip, completing strip
Alloying process.Initial temperature with steel alloying is 460 DEG C or so of zinc liquid in zinc pot, then heated by bottom-heated section, is reached
Enter middle part soaking zones to 530~550 DEG C or so and kept for a period of time, the top cooling section temperature of alloying furnace for 280~
320 DEG C, to obtain preferable alloying layer.
But influenceed by the alloying furnace " stack effect " of vertical, it is intact even in stove integral sealing
In the case of, heat is also easily emitted to upper end upwards from middle part soaking zone lower end, and lower end is then entered by cold air to supplement, in causing
Portion soaking zone upper end temperature is higher than lower end, and its harm is mainly reflected in：The quick dissipation of heat can not ensure that middle part soaking zone is protected
The technological temperature at 530~550 DEG C is held, only 480 DEG C of holding temperature, or even alloying process can not be smoothly completed sometimes.
Continuously controlled to solve the above problems, those skilled in the art are disposed with controllable silicon in the bottom of galvanized steel soaking zone
The resistance radiant tube heater of system, compensate radiation loss；Sealing baffle is also installed in the porch of galvanized steel soaking zone, to subtract
Few cold air enters soaking zone；Turnover plate type water-tight equipment is provided with the exit of zinc-plated soaking zone, to limit the heat of soaking zone
Air-flow flows out；By the cooling section of soaking zone outlet above galvanized steel, it is designed as, using nozzle injection aeroseal, making freely to penetrate
Gas body forms reliable and stable cut-off air screen；, again will be new for convenience after the zinc-plated and alloying of a section strip steel is completed
One section of strip passes through alloying furnace, and prevents from making belt steel surface produce cut, the nozzle of galvanized steel both sides in this process
Level interval should be greater than 200mm.
But due to free jet on each section the conservation of momentum, from nozzle spray free jet, due to its molecule micelle
Pulsation and ambient gas momentum-exchange occurs, ambient gas is flowed with Gas Jet, produce Involving velocity, increase with range
Add, the Gas Jet speed of section part reduces, and the Gas Jet quality increase of section part, Gas Jet kinetic energy declines, and causes jet
The hot gas that air screen can not be obstructed effectively in soaking zone flows to cooling section flowing, and furnace pressure can not be made to keep stable.
The content of the invention
It is contemplated that overcome existing technical problem, it is therefore an objective to provide adherent in a kind of galvanized steel alloying process penetrate
Stream sealing stable-pressure device and its application method, can effectively hinder the thermal current of galvanized steel soaking zone to rise, and not
The thermal requirements of galvanized steel soaking zone are realized on the basis of influence hot-dip galvanized steel strip surface quality.
To achieve the above object, the technical solution adopted by the present invention is：The diverted roller of galvanized steel is through soaking zone and right
Claim the bellows at left and right sides of installation soaking zone exit, the inner side of two bellows is symmetrically provided with 3~10 nozzles, nozzle and fortune
Distance H between dynamic galvanized steel is 100~200mm, and outer rim is connected with resistance by hinge on the downside of each jet expansion
Flowing plate；
The upper and lower side of two bellows front and rear sides is each to be symmetrically equiped with one group of sliding way and glide path, the two pieces of work of size identical
Dynamic side plate is separately mounted to every group of left and right sides between sliding way and glide path, and every piece of mobile side board inner side is fixedly connected and institute
Every piece is stated stud corresponding to spoiler；
The bellows inwall of the left and right sides and four pieces of mobile side boards of front and rear sides surround closed channel, under the closed channel
End and the port of export closing of galvanized steel soaking zone connect.
Further, the shape of the nozzle is identical, and the width of nozzle is smaller 80~120mm than the width of bellows, nozzle with
The setting angle of horizontal plane is -15 °~+15 °；The spout of nozzle is bar slit, and the spout of nozzle is that d is 5~20mm.
Further, sliding way and glide path, left and right are respectively fixedly mounted on the casing of the front and rear sides of described two bellows
The mobile side board of both sides is arranged between sliding way and glide path, for making mobile side board or so translation closure or separation, activity
Stud radius on side plate is r mm.
Preferably, when the left and right sides mobile side board closes, each stud and the zinc-plated band of motion on mobile side board
Distance L between steel is 30+r~200-r mm.
Preferably as the improvement of wall-jets sealing stable-pressure device in galvanized steel alloying process, left and right sides institute
When stating mobile side board closure, each stud on mobile side board and the distance L between the galvanized steel of motion are 60+r~100-r
mm。
Preferably, when the left and right sides mobile side board separates, each stud and the zinc-plated band of motion on mobile side board
Distance L between steel is 100+r~200+r mm.
Further, the application method based on wall-jets sealing stable-pressure device in galvanized steel alloying process, including：
A is used for the method that wall-jets gas curtain is formed in galvanized steel alloying, or b between slewing rollers for when wearing galvanized steel
Form the method that galvanized steel wears passage.
Based on the application method of wall-jets sealing stable-pressure device in galvanized steel alloying process, application method a is also wrapped
Include following steps：
Mobile side board is moved horizontally into closure, makes to be fixedly connected on the stud translation on mobile side board, will be with jet expansion
The spoiler that downside is flexibly connected is held up to parallel with jet expansion direction；Make the distance W between spoiler end and galvanized steel
For 30~60mm；Again by pressure be 5~20kPa effluxvelocities be 20~40m/s gas through bellows from jet expansion spray to
Galvanized steel, jet move along spoiler is adherent to galvanized steel, obtain wall-jets gas curtain.
Based on the application method of wall-jets sealing stable-pressure device in galvanized steel alloying process, application method b is also wrapped
Include following steps：
Mobile side board is moved horizontally into separation, made to be fixedly connected under the stud on mobile side board translates away from spoiler just
Side, the spoiler being flexibly connected with jet expansion lower side panel is sagging, and plating is formed between symmetrical sagging both sides spoiler inner side plane
Zinc strip draws passage, make the distance W between symmetrical sagging both sides spoiler inner side plane and galvanized steel be 100~
200mm。
Based on the application of wall-jets sealing stable-pressure device in galvanized steel alloying process, further, methods described a
Middle wall-jets initial segment range length is more than nozzle to the distance H between galvanized steel.
Due to using above-mentioned technical proposal, from the free jet of nozzle ejection, pulsation and surrounding due to its molecule micelle
Momentum-exchange occurs for gas, ambient gas is flowed generation Involving velocity with free jet, for long and narrow bar slit spout,
Volume inhales the long side both sides for occurring mainly in spout, forms negative pressuren zone in both sides, after mobile side board is closed, the gas in bellows leads to
When crossing the hot-dip galvanized steel strip of nozzle directive motion, because each stud on mobile side board holds up what is be connected with each nozzle underside
Spoiler, and the angle between spoiler and the free jet axis of ejection is limited by spoiler, made under free jet close to 0 °
Volume on the downside of side and spout between spoiler is much smaller than between being emptied between the volume on the upside of free jet is emptied, the tonifying Qi of free jet both sides
Space differs, so as to cause jet both sides due to volume is inhaled and caused static pressure is uneven, make the adherent edge of free jet deflection
Spoiler moves to the galvanized steel direction of motion, forms wall-jets, is moved up and down respectively close to after belt steel surface.
And due to wall-jets, the laminar sublayer and turbulent flow leapfrog structure of choked flow plate face, due to the limitation of spoiler wall,
Ambient gas can not be sucked in by volume so that the velocity gradient of laminar sublayer and turbulent flow leapfrog structure is very big, kinetic energy increase, therefore can have
Effect improves the effluxvelocity and jet intensity of gas, and increase jet distinguishes post exercise pressure up and down close to after belt steel surface
Force value, while spoiler downside does not produce upward volume and inhaled.Using Gas Jet as Jie for hindering soaking zone thermal current to rise
Matter, Gas Jet is formed gas curtain together between spoiler and the hot-dip galvanized steel strip of motion, can effectively hinder galvanized steel
The thermal current of soaking zone rises.
Further, since having installed spoiler and mobile side board, the flow area of thermal current rising can be efficiently reduced, is reduced
The air capacity aspirated by stack effect, it is also beneficial to furnace pressure and keeps stable.
When mobile side board separates, spoiler is sagging, the spacing increase between spoiler and steel band, is worn beneficial between slewing rollers
One section of galvanized steel strip is set, spoiler is scratched galvanized steel strip influences surface quality.
Mobile side board and up and down slideway structure design are simple and reliable, are not damaged by hot environment in bellows, can guarantee that and hold
Continuous effective operation, and beneficial to outside, whether spoiler holds up in monitoring bellows on the outside of bellows, is easy to the reality of Automated condtrol
It is existing.
Therefore, the present invention more can effectively hinder the thermal current of galvanized steel soaking zone to rise, and not influence alloying heat
On the basis of galvanized steel production technology and strip surface quality, the thermal requirements of galvanized steel soaking zone are realized.
Brief description of the drawings
Fig. 1 is the wall-jets sealing stable-pressure device structural representation of the present invention；
Fig. 2 is Fig. 1 schematic top plan view；
Fig. 3 is the mplifying structure schematic diagram at A in Fig. 1.
Embodiment
The invention will be further described with reference to the accompanying drawings and detailed description, not to the limit of its protection domain
System.
Figure of description is simplified schematic diagram, only illustrates the basic structure of the present invention in a schematic way, therefore, only shows
The composition relevant with the present invention.
Embodiment 1
In a kind of galvanized steel alloying process wall-jets seal stable-pressure device, the device mainly by bellows 8, nozzle 5,
Mobile side board 7, spoiler 2, stud 3, sliding way 6, glide path 10 etc. form, the wide 1000mm of galvanized steel.
Such as Fig. 1~3, the diverted roller 12 of galvanized steel is through soaking zone 11 and is symmetrically installed exit of soaking zone 11 or so two
The bellows 8 of side, the front and rear sides in the exit of galvanized steel soaking zone 11 are symmetrical to be equiped with four pieces of mobile side boards 7, two wind
Sliding way 6 and glide path 10 are respectively fixedly mounted on the casing of the front and rear sides of case 8, the mobile side board 7 of the left and right sides is installed in upper
Between slideway 6 and glide path 10, can level move left and right, the inwall of bellows 8 of the left and right sides and four pieces of active sides of front and rear sides
Plate 7 surrounds closed channel, and the lower end of the closed channel connects with the port of export closing of galvanized steel soaking zone 11；Two bellows 8
Inner side be symmetrically provided with 3~5 nozzles 5, each bellows 8 communicate with the nozzle 5 being each provided with, the nozzle 5 of two bellows 8
Spout is installed in opposite directions；Distance H between nozzle 5 and the galvanized steel 1 of motion is 100mm, is with the distance D between side nozzle 5
The setting angle of 100mm, nozzle 5 and horizontal plane is -10 °~+10 °, and the spout d of nozzle 5 is 10mm, and spout stitches for bar
Shape, the width of nozzle 5 are smaller 80~100mm than the width of bellows 8.Each bellows 8 are communicated by respective air inlet 9 with source of the gas,
The height of bellows is 1000~2000mm.
Spoiler 2, the downside that nozzle 5 exports are connected with by hinge 4 at the downside outer rim of each nozzle 5 outlet
Outer rim and the distance of nozzle 5 are 10mm, and stud 3 corresponding with spoiler, the resistivity of stud 3 are fixedly connected with every piece of mobile side board 7
Low 5~the 10mm in the hinge end of flowing plate 2, during the device normal operation, the mobile side board 7 of the left and right sides is in closure state, and stud 3 will
Spoiler 2 is held up the level of, and at this moment the distance W between the end of spoiler 2 and galvanized steel 1 is 30~45mm, and the radius of stud 3 is 5mm,
Each stud 3 on mobile side board 7 and the distance L between the galvanized steel of motion are 50~65mm；
When the device is out of service or need to wear galvanized steel, four pieces of mobile side boards 7 distinguish 10 liang of upward slideway 6, glide path
End is mobile to be opened, and spoiler 2 is turned on one's side be in plumbness under gravity, now between the plane of spoiler 2 and galvanized steel 1
Distance be equal to distance between nozzle 5 and galvanized steel 1, form zinc-plated band between the symmetrical sagging inner side plane of both sides spoiler 2
Steel draws passage.The length of spoiler 2 is identical with the width of bellows 8.
The height of four pieces of mobile side boards 7 is 1000mm~1500mm.
When spoiler 2 is lifted, the vertical range of nozzle 5 and spoiler 2 is 10mm<0.3D, the jet that nozzle sprays
There is near-wall air curtain, Involving velocity causes the axle center of jet to bend, and negative pressuren zone is formed in bar slit spout both sides, and is obstructed
Flowing plate limits, and the volume on the downside of Gas Jet and on the downside of spout between spoiler is emptied between being emptied much smaller than the volume on the upside of Gas Jet
Between, the tonifying Qi space of Gas Jet both sides differs, so as to cause Gas Jet both sides due to volume inhale and caused static pressure not
Balance, make Gas Jet deflection adherent, form wall-jets, jet initial pressure p1=5kpa, nozzle exit Gas Jet
Speed v0For 20m/s.Wall-jets initial segment range length is that 790mm is more than nozzle to the distance 100mm between galvanized steel.Patch
Wall jet includes free-extension section, limited spread section, contraction section from integrated range after jet ejection, in free-extension section spoiler not
Jet extension is hindered, jet-core region speed loss is minimum, in finite extension section, jet entrainment surrounding fluid declines, jet
The expansion of section and the increase of flow are slower, and after limited spread section of jumping over, jet starts to run off boundary layer generation backflow,
Jet flow starts to reduce along journey until being 0, the length of free-extension section and limited spread section is penetrated for the initial segment of wall-jets
Journey.
Embodiment 2
In a kind of galvanized steel alloying process wall-jets seal stable-pressure device, the device mainly by bellows 8, nozzle 5,
Mobile side board 7, spoiler 2, stud 3, sliding way 6, glide path 10 etc. form, the wide 1000mm of galvanized steel.
Such as Fig. 1~3, the diverted roller 12 of galvanized steel is through soaking zone 11 and is symmetrically installed exit of soaking zone 11 or so two
The bellows 8 of side, the front and rear sides in the exit of galvanized steel soaking zone 11 are symmetrical to be equiped with four pieces of mobile side boards 7, two wind
Sliding way 6 and glide path 10 are respectively fixedly mounted on the casing of the front and rear sides of case 8, the mobile side board 7 of the left and right sides is installed in upper
Between slideway 6 and glide path 10, can level move left and right, the inwall of bellows 8 of the left and right sides and four pieces of active sides of front and rear sides
Plate 7 surrounds closed channel, and the lower end of the closed channel connects with the port of export closing of galvanized steel soaking zone 11；Two bellows 8
Inner side be symmetrically provided with 3~5 nozzles 5, each bellows 8 communicate with the nozzle 5 being each provided with, the nozzle 5 of two bellows 8
Spout is installed in opposite directions；Distance H between nozzle 5 and the galvanized steel 1 of motion is 150mm, is with the distance D between side nozzle 5
The setting angle of 300mm, nozzle 5 and horizontal plane is -10 °~+10 °, and the spout d of nozzle 5 is 10mm, and spout stitches for bar
Shape, the width of nozzle 5 are smaller 80~100mm than the width of bellows 8.Each bellows 8 are communicated by respective air inlet 9 with source of the gas,
The height of bellows is 1000~2000mm.
Spoiler 2, the downside that nozzle 5 exports are connected with by hinge 4 at the downside outer rim of each nozzle 5 outlet
Outer rim and the distance of nozzle 5 are 20mm, and stud 3 corresponding with spoiler, the resistivity of stud 3 are fixedly connected with every piece of mobile side board 7
Low 5~the 10mm in the hinge end of flowing plate 2, during the device normal operation, the mobile side board 7 of the left and right sides is in closure state, and stud 3 will
Spoiler 2 is held up the level of, and at this moment the distance W between the end of spoiler 2 and galvanized steel 1 is 30~45mm, and the radius of stud 3 is
10mm, each stud 3 on mobile side board 7 and the distance L between the galvanized steel of motion are 50~65mm；
When the device is out of service or need to wear galvanized steel, four pieces of mobile side boards 7 distinguish 10 liang of upward slideway 6, glide path
End is mobile to be opened, and spoiler 2 is turned on one's side be in plumbness under gravity, now between the plane of spoiler 2 and galvanized steel 1
Distance be equal to distance between nozzle 5 and galvanized steel 1, form zinc-plated band between the symmetrical sagging inner side plane of both sides spoiler 2
Steel draws passage.The length of spoiler 2 is identical with the width of bellows 8.
The height of four pieces of mobile side boards 7 is 1000mm~1500mm.
When spoiler 2 is lifted, the vertical range of nozzle 5 and spoiler 2 is 20mm<0.3D, the jet that nozzle sprays
There is near-wall air curtain, Involving velocity causes the axle center of jet to bend, and negative pressuren zone is formed in bar slit spout both sides, and is obstructed
Flowing plate limits, and the volume on the downside of Gas Jet and on the downside of spout between spoiler is emptied between being emptied much smaller than the volume on the upside of Gas Jet
Between, the tonifying Qi space of Gas Jet both sides differs, so as to cause jet both sides due to volume inhale and caused static pressure is uneven,
Gas Jet is set to deflect adherent, jet initial pressure p1=20kpa, nozzle exit Gas Jet speed v0For 40m/s.It is adherent
Jet initial segment range length is 1369mm, more than nozzle to the distance 150mm between galvanized steel.Wall-jets spray from jet
Integrated range includes free-extension section, limited spread section, contraction section afterwards, extends, penetrates without prejudice to jet in free-extension section spoiler
Flow center speed loss is minimum, in finite extension section, jet entrainment surrounding fluid declines, the expansion of jet flow section and stream
The increase of amount is slower, and after limited spread section of jumping over, jet starts to run off boundary layer generation backflow, and jet flow starts along journey
Reduce until being 0, the length of free-extension section and limited spread section is the initial segment range of wall-jets.
Embodiment 3
Wall-jets sealing stable-pressure device and its application method in a kind of galvanized steel alloying process, the device mainly by
Bellows 8, nozzle 5, mobile side board 7, spoiler 2, stud 3, sliding way 6, glide path 10 etc. form, the wide 1000mm of galvanized steel.
Such as Fig. 1~3, the diverted roller 12 of galvanized steel is through soaking zone 11 and is symmetrically mounted on exit of soaking zone 11 or so
The bellows 8 of both sides, the front and rear sides in the exit of galvanized steel soaking zone 11 are symmetrically equiped with four pieces of mobile side boards 7, two bellows 8
Front and rear sides casing on it is each sliding way 6 and glide path 10 is fixedly mounted, the mobile side board 7 of the left and right sides is arranged on sliding way
Between 6 and glide path 10, can level move left and right, the inwall of bellows 8 of the left and right sides and four pieces of mobile side boards 7 of front and rear sides enclose
Into closed channel, the lower end of the closed channel connects with the port of export closing of galvanized steel soaking zone 11；The inner side of two bellows 8
6~10 nozzles 5 are symmetrically provided with, each bellows 8 communicate with the nozzle 5 being each provided with, the spout of the nozzle 5 of two bellows 8
Opposite installation；Distance H between nozzle 5 and the galvanized steel 1 of motion is 200mm, is 500mm with the distance D between side nozzle 5, spray
The setting angle of mouth 5 and horizontal plane is -15 °~+15 °, and the spout of nozzle 5 is 20mm, and spout is bar slit, nozzle 5
Width is smaller 100~120mm than the width of bellows 8.Each bellows 8 are communicated by respective air inlet 9 with source of the gas, the height of bellows
For 2000~6000mm.
Spoiler 2, the downside that nozzle 5 exports are connected with by hinge 4 at the downside outer rim of each nozzle 5 outlet
Outer rim and the distance of nozzle 5 are 30mm, and stud 3 corresponding with spoiler, the resistivity of stud 3 are fixedly connected with every piece of mobile side board 7
Low 5~the 10mm in the hinge end of flowing plate 2, during the device normal operation, left and right sides mobile side board 7 is closed, and stud 3 will hinder
Flowing plate 2 is held up the level of, and at this moment the distance W between the end of spoiler 2 and galvanized steel 1 is 45~60mm；The radius of stud 3 is 10mm,
Each stud 3 on mobile side board 7 and the distance L between the galvanized steel of motion are 60~80mm；The device is out of service or needs
When wearing galvanized steel, four pieces of mobile side boards 7 distinguish upward slideway 6, the movement of the both ends of glide path 10 is opened, and spoiler 2 is in gravity
The lower rollover of effect is in plumbness, and now the distance between the plane of spoiler 2 and galvanized steel 1 is equal to nozzle 5 and galvanized steel 1
Between distance, form galvanized steel traction passage between the symmetrical sagging inner side plane of both sides spoiler 2.The length of spoiler 2 and wind
The width of case 8 is identical.
The height of four pieces of mobile side boards 7 is 2000mm~3000mm.
When spoiler 2 is lifted, the vertical range of nozzle 5 and spoiler 2 is 30mm<0.3D, the jet that nozzle sprays
There is near-wall air curtain, Involving velocity causes the axle center of jet to bend, and negative pressuren zone is formed in bar slit spout both sides, and is obstructed
Flowing plate limits, and the volume on the downside of Gas Jet and on the downside of spout between spoiler is emptied between being emptied much smaller than the volume on the upside of Gas Jet
Between, the tonifying Qi space of Gas Jet both sides differs, so as to cause Gas Jet both sides due to volume inhale and caused static pressure not
Balance, Gas Jet is set to deflect adherent, jet initial pressure p1=20kpa, nozzle exit Gas Jet speed v0For 30m/s.
Wall-jets initial segment range length is 1768mm, more than nozzle to the distance 200mm between galvanized steel.Wall-jets are from jet
Integrated range includes free-extension section, limited spread section, contraction section after ejection, expands in free-extension section spoiler without prejudice to jet
Exhibition, jet-core region speed loss is minimum, in finite extension section, jet entrainment surrounding fluid declines, the expansion of jet flow section
And the increase of flow is slower, after limited spread section of jumping over, jet starts to run off boundary layer generation backflow, and jet flow is opened
Begin to reduce along journey until being 0, the length of free-extension section and limited spread section is the initial segment range of wall-jets.
And without under spoiler state, along free jet direction, jet is divided into two sections：Initial segment and principal piece, initial segment are to penetrate
The nucleus and jet boundary layer of stream, in principal piece jet-core region, speed is gradually reduced, and jet area flow increase, volume inhales surrounding
Gas flow is more, and energy of the impinging jet more reduces, and hinders soaking zone thermal current effect of increasing to weaken by jet, and turbulence factor а=
0.066, jet initial segment lengthP=51~204mm, and without under spoiler state, jet initial segment length
No more than nozzle to 100~200mm of distance between galvanized steel, therefore free jet is difficult to play sealing function.
When not using the solution of the present invention, from the free jet of nozzle ejection, pulsation and surrounding due to its molecule micelle
Momentum-exchange occurs for gas, ambient gas is flowed generation Involving velocity with free jet, for long and narrow bar slit spout,
Volume inhales the long side both sides for occurring mainly in spout, and negative pressuren zone is formed in both sides, compared with the free jet under without spoiler state,
Due to the limitation of wall in the present invention, after mobile side board is closed, galvanizing that the gas in bellows is moved by nozzle directive
During strip, because each stud on mobile side board holds up the spoiler being connected with each nozzle underside, and spoiler and spray
Angle between the Gas Jet axis gone out is limited close to 0 ° by spoiler, is made on the downside of Gas Jet between the spoiler of spout downside
Volume be emptied between be emptied much smaller than the volume on the upside of Gas Jet between, the tonifying Qi space of Gas Jet both sides differs, so as to cause
Gas Jet both sides deflect Gas Jet adherent along spoiler to the plating moved because volume is inhaled and caused static pressure is uneven
Zinc strip direction is moved, and is formed wall-jets, is moved up and down respectively close to after belt steel surface.
And due to wall-jets, the laminar sublayer and turbulent flow leapfrog structure of choked flow plate face, due to the limitation of spoiler wall,
Ambient gas can not be sucked in by volume so that the velocity gradient of laminar sublayer and turbulent flow leapfrog structure is very big, kinetic energy increase, therefore can have
Effect improves the effluxvelocity and jet intensity of gas, therefore it is slower to decay, integrated range and the more same spout of jet initial segment length
Free jet is grown, and increases Gas Jet and post exercise pressure value, while choked flow up and down is distinguished close to after belt steel surface
Plate downside does not produce upward volume and inhaled.Using Gas Jet as the medium for hindering soaking zone thermal current to rise, make Gas Jet
Gas curtain together is formed between spoiler and the hot-dip galvanized steel strip of motion, can effectively hinder the thermal current of galvanized steel soaking zone
Rise.
Further, since having installed spoiler and mobile side board, the flow area of thermal current rising can be efficiently reduced, is reduced
The air capacity aspirated by stack effect, it is also beneficial to furnace pressure and keeps stable.
When mobile side board separates, spoiler is sagging, the spacing increase between spoiler and steel band, is worn beneficial between slewing rollers
One section of galvanized steel strip is set, spoiler is scratched galvanized steel strip influences surface quality.
Mobile side board and up and down slideway structure design are simple and reliable, are not influenceed by hot environment in bellows, can guarantee that and hold
Continuous effective operation, and beneficial to outside, whether spoiler holds up in monitoring bellows on the outside of bellows, is easy to the reality of Automated condtrol
It is existing.
Claims (10)
1. wall-jets seal stable-pressure device in a kind of galvanized steel alloying process, the diverted roller of galvanized steel (12), which passes through, to be protected
Temperature section (11) and the bellows (8) being symmetrically installed at left and right sides of soaking zone (11) exit, it is characterised in that：Two bellows (8)
Inner side is symmetrically provided with 3~10 nozzles (5), and the distance H between nozzle (5) and the galvanized steel (1) moved is 100~200mm,
Downside outer rim is exported in each nozzle (5), and spoiler (2) is connected with by hinge (4)；
The upper and lower side of two bellows (8) front and rear sides is each to be symmetrically equiped with one group of sliding way (6) and glide path (10), size identical
Two pieces of mobile side boards (7) are separately mounted to the left and right sides between every group of sliding way (6) and glide path (10), every piece of mobile side board
(7) inner side be fixedly connected with every piece state the corresponding stud (3) of spoiler (2)；
Bellows (8) inwall of the left and right sides and four pieces of mobile side boards (7) of front and rear sides surround closed channel, the closed channel
Lower end and the port of export closing of galvanized steel soaking zone (11) connect.
2. wall-jets seal stable-pressure device in galvanized steel alloying process according to claim 1, it is characterised in that
The shape of the nozzle (5) is identical, and the width of nozzle (5) is smaller 80~120mm than the width of bellows (8), nozzle (5) and horizontal plane
Setting angle be -150~+150；The spout of nozzle (5) is bar slit, and the spout d of nozzle (5) is 5~20mm.
3. wall-jets seal stable-pressure device in galvanized steel alloying process according to claim 1, it is characterised in that
Sliding way (6) and glide path (10), the work of the left and right sides are respectively fixedly mounted on the casing of the front and rear sides of described two bellows (8)
Dynamic side plate (7) is arranged between sliding way (6) and glide path (10), for making mobile side board (7) left and right translation closure or separation,
Stud radius on mobile side board is r mm.
4. wall-jets seal stable-pressure device in galvanized steel alloying process according to claim 3, it is characterised in that
When the left and right sides mobile side board (7) closes, between each stud (3) on mobile side board (7) and the galvanized steel moved
Distance L is 30+r~200-r mm.
5. wall-jets seal stable-pressure device in galvanized steel alloying process according to claim 3, it is characterised in that
When the left and right sides mobile side board (7) closes, between each stud (3) on mobile side board (7) and the galvanized steel moved
Distance L is 60+r~100-r mm.
6. wall-jets seal stable-pressure device in galvanized steel alloying process according to claim 3, it is characterised in that
When the left and right sides mobile side board (7) separates, between each stud (3) on mobile side board (7) and the galvanized steel moved
Distance L is 100+r~200+r mm.
7. the application method of wall-jets sealing stable-pressure device in galvanized steel alloying process as claimed in claim 1, its
It is characterised by including：A is used for the method that wall-jets gas curtain is formed in galvanized steel alloying process, or b is used to turn to
The method that galvanized steel wears passage is formed when galvanized steel is worn between roller.
8. the application method of wall-jets sealing stable-pressure device in galvanized steel alloying process as claimed in claim 7, its
It is characterised by, application method a is further comprising the steps of：
Mobile side board (7) is moved horizontally into closure, the stud (3) for making to be fixedly connected on mobile side board (7) translates, will be with nozzle
(5) spoiler (2) that outlet downside is flexibly connected is held up to parallel with nozzle (5) export direction；Make spoiler (2) end and plating
Distance W between zinc strip (1) is 30~60mm；Again by pressure be 5~20kPa effluxvelocities be 20~40m/s gas through wind
From nozzle (5) outlet injection to galvanized steel (1), jet moves case (8) along spoiler (2) is adherent to galvanized steel, obtains adherent
Jet gas curtain.
9. the application method of wall-jets sealing stable-pressure device in galvanized steel alloying process as claimed in claim 7, its
It is characterised by, application method b is further comprising the steps of：
Mobile side board (7) is moved horizontally into separation, the stud (3) for making to be fixedly connected on mobile side board (7) translates away from choked flow
Immediately below plate (2), the spoiler (2) being flexibly connected with nozzle (5) outlet lower side panel is sagging, symmetrical sagging both sides spoiler
(2) galvanized steel traction passage is formed between inner side plane, makes symmetrical sagging both sides spoiler (2) inner side plane and galvanized steel
(1) the distance W between is 100~200mm.
10. the application method of wall-jets sealing stable-pressure device in galvanized steel alloying process as claimed in claim 8, its
It is characterised by, wall-jets initial segment range length is more than nozzle (5) to the distance H between galvanized steel (1) in methods described a.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711014182.8A CN107604297B (en) | 2017-10-26 | 2017-10-26 | Wall-attached jet flow sealing pressure stabilizing device in galvanized strip steel alloying process and use method thereof |
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| CN201711014182.8A CN107604297B (en) | 2017-10-26 | 2017-10-26 | Wall-attached jet flow sealing pressure stabilizing device in galvanized strip steel alloying process and use method thereof |
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| CN107604297B CN107604297B (en) | 2023-08-25 |
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Cited By (1)
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| CN110736514A (en) * | 2019-10-31 | 2020-01-31 | 北京工业大学 | method for measuring mass flow rate of gas sonic jet entrainment |
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| CN107604297B (en) | 2023-08-25 |
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