CN103502499B - Gas wiping device - Google Patents
Gas wiping device Download PDFInfo
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- CN103502499B CN103502499B CN201280019830.8A CN201280019830A CN103502499B CN 103502499 B CN103502499 B CN 103502499B CN 201280019830 A CN201280019830 A CN 201280019830A CN 103502499 B CN103502499 B CN 103502499B
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- gas
- slide mechanism
- width
- steel band
- occlusion component
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
This invention relates to a gas wiping device provided with a gas wiping nozzle which sprays a gas onto the surface of the steel strip to adjust the amount of a molten metal for plating which adheres to said surface, said gas wiping device having excellent overcoat and splash suppression at the ends of the steel strip in the width direction. This gas wiping device (10) is provided in a gas wiping nozzle (1) with a slit (1a') which extends in the width direction of a steel strip (K) and sprays a gas from a hollow space, and with gas inlets (1e) for introducing the gas into the hollow space; in the slit (1a') are provided left and right blocking members (2, 2) which freely slide and block the left and right regions of said slit, and a gas outlet port (1a) is formed between the left and right blocking members (2, 2); in the hollow space are provided left and right rectifier pieces (1c, 1c) which extend from the outlet port-side ends (2a, 2a) of the left and right blocking members (2, 2) to a partition wall (1d), forming a gas flow path (GR) between the left and right rectifier pieces (1c, 1c), wherein the width of the gas outlet port (1a) and the width of the gas flow path (GR) are the same.
Description
Technical field
The present invention relates to a kind of gas wiping apparatus, it is to continus convergence and impregnated in steel strip surface jet flow stream in plating bath to regulate the adhesion amount being attached to the molten metal of the plating on this surface.
Background technology
When carrying out molten metal plating in the plating bath making steel band continuous impregnating at molten metal, generally carry out not the solidifying electroplating surface jet flow stream of steel band after to dipping and regulate the so-called airblast of the adhesion amount of molten metal, such as, the gas wiping apparatus of gas wiping nozzle is possessed, by carrying out airblast to this steel band both sides blow gas in the configuration of the steel band both sides of continus convergence.
Gas wiping nozzle has the elongated shape corresponding with the length of the width of the steel band carried upward in the molten metal being impregnated in plating tank, by its front, is formed with the slot-shaped gas blow-out mouth of blow gas along this width (longitudinal direction).By from this gas blow-out mouth to steel band from one end of the width of steel band to the other end linearly jet flow stream, remove the molten metal of steel strip surface on request to regulate its adhesion amount.
But in above-mentioned airblast, the adhesion amount of the molten metal at the both ends in width of steel band direction is more more than other parts crosses coating, or is become problem by the splashing that the molten metal of airblast disperses at both ends.These problems crossing coating or splashing become the reason producing sinuous flow etc. near the both ends of steel band because the gas sprayed from the gas wiping nozzle of subtend is impinging one another.
Cross coating to reduce the above-mentioned of the width both ends of steel band or splash, Patent Document 1 discloses a kind of gas wiping apparatus, it has: the end positions in the gap of the nozzle of a pair nozzle both sides of subtend is set as the inaccessible mechanism in variable gap, the end positions in this gap is adjusted to the wavelength width of a slit regulating mechanism of the end positions of steel band and the mechanism that is certain mode adjusting gas flow with the short-term training of the discharging jet of said nozzle.
According to this gas wiping apparatus, the end positions of steel band is adjusted to by the end positions in the gap of a pair nozzle both sides by the subtend across steel band, form the state can not sharply collided each other from the jet flow of the nozzle of subtend, eliminate the sinuous flow that jet flow collision each other causes, make the adhesion amount distribution of the molten metal of steel strip surface even as much as possible, the generation of splashing and crossing of both ends can be suppressed to apply.
But, gas wiping apparatus disclosed in patent documentation 1 is that the blow-off outlet of inaccessible gas is to reduce gas injection width, therefore, the gas circulated in the cavity of nozzle is at blow-off outlet significantly contracted flow, due to this contracted flow, periodically produce eddy current, this eddy current upsets gas flow, produce crossing coating or splashing of the width end of steel band by phased manner, can not suppress crossing coating or splashing completely.
With reference to the schematic diagram shown in Figure 11, this phenomenon is described.Figure 11 is the figure simplified gas wiping apparatus W disclosed in patent documentation 1, two occlusion component H, H slide freely in (Y1 direction) in its front, according to their slip, regulate the width of the gas blow-out mouth E of the central authorities surrounded by occlusion component H, H changeably.The gas (X3 direction) imported from the rear of gas wiping apparatus W forwards circulates via its cavity and sprays (X4 direction) from gas blow-out mouth E, but flow through its cavity and the gas arriving occlusion component H, H makes it flow to center side contracted flow (X5 direction) sharp, above-mentioned eddy current is produced because of this contracted flow sharply, this eddy current upsets gas flow, produces crossing coating or splashing of the width end of steel band by phased manner.
Prior art document
Patent documentation
Patent documentation 1:(Japan) JP 2007-284732 publication
Summary of the invention
Invent problem to be solved
The present invention develops in view of the above problems, it relates to the gas wiping apparatus possessing and steel strip surface jet flow stream is regulated to the gas wiping nozzle of the adhesion amount of the molten metal of the plating being attached to this surface, the object of the invention is, provides a kind of gas wiping apparatus crossing the inhibition excellence of coating or splashing of width end of steel band.
For solving the means of problem
In order to realize described object, the invention provides a kind of gas wiping apparatus, it possesses the gas wiping nozzle with cavity steel strip surface jet flow stream being regulated to the adhesion amount of the molten metal of the plating on this surface, wherein, it is extended and from the gap of described cavity blow gas and the dividing plate (next door) possessing gas introduction port gas being imported this cavity that described gas wiping nozzle comprises width along steel band, region about being equipped in described gap according to width of steel band obturation and the occlusion component of the left and right slid freely along this gap, and separate this about occlusion component between be formed with gas blow-out mouth, the rectiblock from the respective gas blow-out mouth side end of the occlusion component of described left and right to the extended left and right of described dividing plate is equipped in described cavity, gas flow path is formed between rectiblock about this, the width of described gas blow-out mouth is identical with the width of described gas flow path.
Form the gas wiping nozzle of gas wiping apparatus of the present invention, with steel band subtend and in the elongated gap extended along the width of this steel band, be equipped with inaccessible region about it and the occlusion component of the left and right slid freely along this gap, be formed with gas blow-out mouth between the occlusion component of the left and right in gap, the width of gas blow-out mouth reaches adjustment freely by the slip of the occlusion component of left and right.In addition, the sliding type of the occlusion component about this has both sides synchronous and either party mode etc. in the occlusion component of the mode of identical amount of sliding or left and right of only sliding, by the slip of the occlusion component of left and right, the width adjusting of gas blow-out mouth can be become the degree identical with width of steel band.More specifically, such as there is the situation etc. the width of steel band of about 700 ~ 1800mm being become identical situation with the width adjusting of gas blow-off outlet or become the width adjusting of gas blow-out mouth to expand respectively from the left and right of width of steel band the width of about 10mm.
And, in the cavity of gas wiping nozzle, be equipped with the rectiblock from the extended left and right of the left and right end occlusion component gas blow-out mouth side end separately to the left and right of gas introduction port, the rectiblock about this is utilized to mark off gas flow path in cavity, thus, from the gas that gas introduction port imports, particularly at the gas that the left and right end of gas flow path flows along rectiblock, the gas blow-out mouth side end via continuous print rectiblock and occlusion component sprays swimmingly from gas blow-out mouth.
That is, following situation can not be produced: flow through gas in the cavity of gas wiping nozzle at gas blow-out mouth by significantly (sharply) contracted flow, periodically produce eddy current due to this contracted flow, this eddy current upsets gas flow.Thereby, it is possible to the crossing of end, width of steel band direction that the gas flow eliminating the eddy current upset be generated completely causes applies or splashes.
Be explained, in this manual, so-called " left and right " refers to and the width of the steel band carried upward from plating tank is defined as left and right directions, with the width of this steel band for benchmark, and the left and right of address steel band, the region, left and right in gap, the left and right end etc. of gas introduction port.
And, the width of the gas flow path marked off by the rectiblock of the left and right in the cavity of gas wiping nozzle and the width of gas blow-off outlet always keep identical, when the width of gas blow-out mouth is changed by the slip of the occlusion component of left and right, the rectiblock of left and right slides similarly thereupon, and the width of gas flow path changes with identical state with the width of gas blow-off outlet.And because the rectiblock of left and right slides like this, the rectiblock of present embodiment presents the structure be separated with dividing plate.
In addition, the preferred implementation of gas wiping apparatus of the present invention is, in the described cavity of described gas wiping nozzle, the tab not arriving lower face is fixed with in the upper surface portion of described cavity, leaving the lower face of position of this tab, be fixed with the erected piece not arriving upper surface portion, the gas importing gas flow path from gas introduction port is able to rectification the process flowing through tab and erected piece.
In gas flow path, arrange tab and erected piece by spaced apart, in the process that gas undulating plain flows through these tabs and erected piece, gas is rectified, the pressure of gas or flow velocity on the width of gas flow path by homogenizing as much as possible.
In addition, as the embodiment of the Sliding Control of the occlusion component about left and right, can enumerate as under type, namely, the occlusion component of described left and right utilizes respectively to reach as the left slide mechanism of intrinsic slide mechanism and right slide mechanism and slides freely, left slide mechanism and right slide mechanism are equipped on shared pedestal, this pedestal is connected with pedestal slide mechanism and slides freely, the position transducer detecting steel band position is provided with near described gas blow-out mouth, the occlusion component of left and right utilizes described left slide mechanism and right slide mechanism to carry out the width slided with adjustments of gas blow-off outlet, pedestal slide mechanism makes pedestal slide based on the position data of the steel band detected by described position transducer, to be slided by pedestal the slip of the right slide mechanism that causes and left slide mechanism, the occlusion component of left and right is made to maintain the width of the gas blow-out mouth regulated constant and slide.
In the present embodiment, the Sliding Control of the occlusion component of left and right utilizes respectively and carries out as the left slide mechanism of intrinsic slide mechanism and right slide mechanism.At this, so-called " slide mechanism " is made up of the air cylinder device making occlusion component slide or the electric sliding block assembly (Electricity Move ス ラ イ ダ device) etc. that slides on sliding substrate.When using air cylinder device, formation can be: piston nose occlusion component being arranged on the slip of constituent apparatus, correspondingly makes occlusion component horizontally slip freely with the slip of piston.In addition, when using electric sliding block assembly, formation can be: be connected with occlusion component by electronic slide block with line etc., and electronic slide block horizontally slips on sliding substrate, correspondingly, occlusion component is horizontally slipped freely.
The data being such as transfused to the relevant width of steel band of process control computer are sent to the slide mechanism of left and right, and the slide mechanism of left and right carries out the width slided to become to require by the width adjusting of gas blow-out mouth based on these transmission data.
In addition, be impregnated in the molten metal in plating tank at the steel band transported from reductive annealed oven, via the synchronous roller be in plating tank to vertical direction conveying after, utilize the gas of the described gas wiping apparatus blowout of the transport road both sides from the steel band being disposed in this vertical direction, wiping is attached to a part for the molten metal of steel band two sides, to be adjusted to the adhesion amount of requirement.Although the width adjusting of gas blow-out mouth have been become based on the data about width of steel band the width required, steel band swans in this course of conveying, and its medullary ray usually departs from the medullary ray of the gas blow-out mouth that width adjusting has terminated.
So, in the present embodiment, left slide mechanism and right slide mechanism are equipped on shared pedestal, make this pedestal be connected with pedestal slide mechanism and slide freely.In addition, the position transducer detecting steel band position is set near gas blow-out mouth, based on the position data (position data of the position of center line data of steel band or the left and right end of steel band) of the steel band from this position transducer, pedestal slide mechanism makes pedestal slide on request, thus, do not change the relative position of the slide mechanism of the left and right defining gas blow-out mouth width, and make them slide in the mode corresponding with steel band position.
In addition, this pedestal slide mechanism also can be the same with the slide mechanism of left and right, utilizes the formation such as air cylinder device or electric sliding block assembly.In addition, about " being provided with the position transducer detecting steel band position near gas blow-out mouth ", from the view point of the gas blow-out that can more critically perform steel band, it is desirable to, the neighbouring middle distance gas blow-out mouth of gas blow-out mouth position near is as far as possible located at by position transducer, here " near ", comprise such as from the bath face in groove to the larger scope the top of the equipping position of gas wiping apparatus.
In addition, as another embodiment of the Sliding Control of the occlusion component about left and right, can enumerate as under type, namely, the occlusion component of described left and right utilizes respectively to reach as the left slide mechanism of intrinsic slide mechanism and right slide mechanism and slides freely, the position transducer detecting steel plate position is provided with near described gas blow-out mouth, the occlusion component of left and right utilizes described left slide mechanism and right slide mechanism to carry out sliding the width of adjustments of gas blow-off outlet, based on the position data of the steel plate detected by described position transducer, it is constant and slide that left slide mechanism and right slide mechanism make the occlusion component of left and right maintain the width of the gas blow-out mouth regulated.
In the present embodiment, utilize the width of left slide mechanism and right slide mechanism adjustments of gas blow-off outlet, identical with the embodiment described, but the slide mechanism about these is not be equipped on shared pedestal, but based on the location information data of the steel band received from position transducer, the slide mechanism of left and right to slide identical amount synchronously to equidirectional, carries out Sliding Control in the mode that the width maintaining the gas blow-out mouth regulated is constant and corresponding with the position of steel band to the occlusion component of left and right.
In addition, preferably to regulate from the mode of holding the gap of left and right occlusion component gas blow-out mouth side end separately to become identical length s about steel band, and be the scope of 0≤s≤10mm.
The present inventor etc. confirm based on the result, when holding from the left and right of steel band the gap s of left and right occlusion component gas blow-out mouth side end separately to become the scope of 0≤s≤10mm, not having the generation of splashing or splashing few, and not producing spray nozzle clogging.
Invention effect
Be appreciated that from above explanation, according to gas wiping apparatus of the present invention, by being connected to form the gas blow-out mouth side end of the left and right occlusion component in the gap of gas blow-out mouth and marking off the so extremely simple improved structure of the left and right rectiblock of gas flow path in the cavity of gas wiping nozzle, the gas that circulates in the cavity of gas wiping nozzle can not be produced at gas blow-out mouth by significantly contracted flow, eddy current is periodically produced due to this contracted flow, this eddy current upsets the consequence of gas flow and so on, and crossing of the end, width of steel band direction that the gas flow can eliminating multilated completely causes applies or splashes.
Brief Description Of Drawings
Fig. 1 is the schematic diagram of the structure representing molten metal electroplanting device;
Fig. 2 is the stereographic map of an embodiment of gas wiping apparatus;
Fig. 3 is the III-III direction view of Fig. 2;
Fig. 4 is the IV-IV direction view of Fig. 3;
Fig. 5 is the sectional elevation of another embodiment of gas wiping apparatus, is the figure corresponding with Fig. 3;
Fig. 6 is the VI-VI direction view of Fig. 5;
Fig. 7 is the schematic diagram of an embodiment of the slide mechanism of left and right occlusion component;
Fig. 8 is the schematic diagram of another embodiment of the slide mechanism of left and right occlusion component;
Fig. 9 (a) is the longitudinal section of analytic model, and (b) is the b-b direction view of (a);
Figure 10 (a) is the figure of the analysis result representing comparative example, and (b) is the figure of the analysis result representing embodiment;
Figure 11 illustrates in existing gas wiping apparatus, and gas is by the schematic diagram of the occlusion component that slides freely contracted flow sharp.
Invention embodiment
Below, be described with reference to the embodiment of accompanying drawing to gas wiping apparatus of the present invention.
(electroplanting device)
Molten metal electroplanting device is represented with schematic diagram in Fig. 1.About the electroplanting device represented in this figure, holding the plating bath that is made up of the molten metal such as fused zinc or molten aluminum M and be rotatably equipped with synchronous roller R in the plating tank Y that has not shown refractory brick etc. and formed of lining cutting within it, the steel band K sent here from reductive annealed oven via not shown spout etc. is impregnated in molten metal M, and via synchronous roller R to vertical direction conveying (X1 direction).
Although be attached with molten metal to the steel band K of vertical direction conveying in its two sides, but above plating tank Y, gas wiping apparatus 10,10 is equipped in the transport road both sides of the steel band K carried to vertical direction, utilize the gas (air, nitrogen, rare gas element etc.) from the blowout of these gas wiping apparatus 10,10, remove the part being attached to the molten metal of the two sides of steel band K, to be adjusted to the adhesion amount of requirement.
(embodiment 1 of gas wiping apparatus)
Fig. 2 is the figure of the embodiment representing the gas wiping apparatus of the electroplanting device of pie graph 1 with stereographic map, Fig. 3 is the III-III direction view of Fig. 2, and Fig. 4 is the IV-IV direction view of Fig. 3.
The gas wiping apparatus 10 represented in Fig. 2 ~ Fig. 4, roughly by have cavity gas wiping nozzle 1, be located at its rear and in the cavity to this gas wiping nozzle 1, provide the not shown gas supply device (supplies for gas) of the gas inflow pipe 1b supply gas of gas to form.
And, it is extended and from the gap 1a ' (its overall width is T) of its cavity blow gas that gas wiping nozzle 1 has width along steel band K, in the 1a ' of this gap, be equipped with its region, left and right inaccessible and along (Y1 direction) left and right occlusion component 2,2 that this gap 1a ' slides freely, the gap area between this left and right occlusion component 2,2 that these separate is formed with gas blow-out mouth 1a.
At the rear, inside of gas wiping nozzle 1, be communicated with gas inflow pipe 1b, in the front of gas inflow pipe 1b, be provided with the dividing plate 1d possessing multiple gas introduction port 1e.The gas provided by not shown gas supply device, via gas inflow pipe 1b(X2 direction) import in gas wiping nozzle 1, then import in cavity via gas introduction port 1e.
In addition, in the cavity of gas wiping nozzle 1, be equipped from left and right occlusion component 2,2 respective gas blow-out mouth side end 2a, 2a to extended left and right rectiblock 1c, the 1c of dividing plate 1d, become gas flow path GR with the space that the upper surface portion of this left and right rectiblock 1c, 1c and cavity and lower face mark off.
Gas wiping apparatus 10 is formed in the mode that the width t of the gas flow path GR formed between left and right rectiblock 1c, 1c is always identical with the width t of gas blow-off outlet 1a.Namely, the one end presenting left and right rectiblock 1c, 1c is fixed with orthogonal posture relative to left and right occlusion component 2,2 respective gas blow-out mouth side end 2a, 2a, and the structure that the other end of left and right rectiblock 1c, 1c and dividing plate 1d depart from completely, thus, can with the identical width t of variable-width adjustments of gas blow-off outlet 1a and the width t of gas flow path GR.
By the slip (Y1 direction) of left and right occlusion component 2,2, the width t of gas blow-out mouth 1a regulates freely, such as have and the width t of the width of the steel band K changed between about 700 ~ 1800mm and gas blow-off outlet 1a be adjusted to identical regulative mode or the width t of gas blow-out mouth 1a be adjusted to the regulative mode etc. expanding the width of about 10mm from about the width of steel band K respectively, can with the width t of the change width of steel band K correspondingly adjustments of gas blow-off outlet 1a on request.
In addition, the sliding type of left and right occlusion component 2,2, have both sides synchronously only to slide mode etc. that either party of the mode of identical amount or only left and right occlusion component carry out sliding.
As shown in Figure 3, importing in the gas (X3 direction) in gas flow path GR from multiple gas introduction port 1e, particularly at the gas that the left and right end of gas flow path GR flows along rectiblock 1c, 1c, the gas blow-out mouth side end 2a via continuous print rectiblock 1c and occlusion component 2 sprays in (X4 direction) swimmingly from gas blow-out mouth 1a.
That is, following impact can not be produced: the gas circulated in the cavity of gas wiping nozzle 1 by contracted flow sharp, periodically produces eddy current because of this contracted flow at gas blow-out mouth 1a, and this eddy current upsets gas flow.Thereby, it is possible to eliminate crossing coating or splashing of the end, width of steel band direction that gas flow that the eddy current that is generated upsets causes completely.
(embodiment 2 of gas wiping apparatus)
Fig. 5 is the sectional elevation of another embodiment of gas wiping apparatus, the VI-VI direction view of to be the figure represented with the form corresponding with Fig. 3, Fig. 6 be Fig. 5.
Illustrated gas wiping apparatus 10A is in gas flow path GR, the tab 3a not arriving lower face is fixed with in the upper surface portion of cavity, be fixed with at the lower face of cavity of the position leaving this tab 3a the erected piece 3b not arriving upper surface portion, the gas importing gas flow path GR from gas introduction port 1e is able to rectification flowing through the process of these tabs 3a and erected piece 3b (X3 ').
The other end of left and right rectiblock 1c, 1c is in the more forward position of erected piece 3b or tab 3a, according to the width variation of gas blow-out mouth 1a, slides in the front of erected piece 3b and tab 3a.
By this rectification, the flow velocity of the gas imported from multiple gas introduction port 1e or pressure are by homogenizing as much as possible on the width of gas flow path GR, and the whole width throughout steel band K provides flow velocity or the equal gas of pressure.
Utilize the gas wiping apparatus 10A of present embodiment equally, importing in the gas in gas flow path GR, particularly at the gas that the left and right end of gas flow path GR flows along rectiblock 1c, 1c from multiple gas introduction port 1e, gas blow-out mouth side end 2a via continuous print rectiblock 1c and occlusion component 2 sprays swimmingly from gas blow-out mouth 1a, can not produce the impact upsetting gas flow and so on because forming eddy current.
(embodiment 1 of the slide mechanism of left and right occlusion component)
Then, with reference to Fig. 7, the embodiment 1 of the slide mechanism of left and right occlusion component is described for gas wiping apparatus 10.
In illustrated slide mechanism, left and right occlusion component 2,2 utilizes intrinsic left slide mechanism 5A and right slide mechanism 5B respectively and horizontally slips freely, in addition, left slide mechanism 5A and right slide mechanism 5B is equipped on common-base 6, this common-base 6 is connected with pedestal slide mechanism 7, to slide freely.
The electronic slide block of left occlusion component 2 and the left slide mechanism 5A of formation, roughly ring-type is connected into via pulley 9 by two lines W1, W1, thus, when left slide mechanism 5A horizontally slips (Z1 direction), left occlusion component 2 also synchronously to horizontally slipping freely (Z1 ' direction).Equally, the electronic slide block of right occlusion component 2 and the right slide mechanism 5B of formation, also connect into roughly ring-type by two lines W2, W2 via pulley 9, when right slide mechanism 5B horizontally slips (Z2 direction), right occlusion component 2 also synchronously to horizontally slipping freely (Z2 ' direction).
In addition, carry the common-base 6 of left slide mechanism 5A and right slide mechanism 5B, utilize the electric cylinder of formation pedestal slide mechanism 7 and slide freely, under the state that the mode can carrying out the gas blow-out mouth 1a specifying required width t is fixed by the position horizontally slipping mechanism 5A, 5B of the slip of left and right occlusion component 2,2 of locating, pedestal 6 utilizes pedestal slide mechanism 7 to slide, thus, the control making the centre line C L 2 of the steel band K swaned in conveying way consistent with the centre line C L 1 of gas blow-off outlet 1a is performed.
Specifically, the data of the width of the relevant steel band K carried by process control computer PC are sent to slide mechanism 5A, 5B of left and right, horizontally slip mechanism 5A, 5B carries out sliding left and right occlusion component 2,2 is slided based on this transmission signal, forms the gas blow-out mouth 1a requiring width t.
On the other hand, the two groups of position transducers 4,4 be disposed near gas blow-out mouth 1a detect near the left and right end of the steel band K by transport road, and these detection data are sent to pedestal slide mechanism 7.According to the detection data from right position sensor 4,4, calculate the centre line C L 2 being in the steel band K of the neighbouring position of gas blow-out mouth 1a, when calculating centre line C L 2 and being inconsistent with the centre line C L 1 of gas blow-out mouth 1a, pedestal slide mechanism 7 and pedestal 6 slide only this residual quantity (Z3 direction), by the slip of this pedestal 6, horizontally slip mechanism 5A, the 5B be equipped on pedestal 6 carries out synchronous slide, correspondingly, left and right occlusion component 2,2 carries out Sliding Control, to make centre line C L 1, the CL2 of gas blow-out mouth 1a and steel band K both sides consistent.
(embodiment 2 of the slide mechanism of left and right occlusion component)
Then, with reference to Fig. 8, the embodiment 2 of the slide mechanism of left and right occlusion component is described for gas wiping apparatus 10.
The difference of illustrated slide mechanism and the slide mechanism shown in Fig. 7 is, in illustrated slide mechanism, horizontally slip mechanism 5A, 5B are not equipped on common-base; After illustrated horizontally slip mechanism 5A, 5B form the gas blow-out mouth 1a of required width t, with steel band K swan correspondingly, both sides synchronously slide only identical amount, thus, follow swaning of steel band K.Further, although only detect the right-hand member ed of steel band K with 1 position transducer 4A, this position transducer 4A utilizes position transducer slide mechanism 8 to slide freely.
To follow the mode swaned of steel band K, position transducer 4A is while slide while detect the right-hand member ed of steel band K by position transducer slide mechanism 8, these detection data are sent to horizontally slip mechanism 5A, 5B, twocouese equidirectional slides identical amount, thus, left and right occlusion component 2,2 to slide identical amount to equidirectional, is positioned required position to be controlled to the right-hand member ed making steel band K relative to gas blow-out mouth 1a.
[sinuous flow of checking splashing degree is resolved and its result]
The analytic model that the present inventor etc. simulate in construction drawing 9a, b in computer, and carry out LES sinuous flow parsing (LES: be not that contrast resolution unit (resolve セ Le) large eddy current carries out modeling, but directly carry out the non-constant sinuous flow analytic method that calculates).As shown in Figure 9 b, the width t1 of steel band is set to 150mm, the insied width t2 of gas vent, the jet width t3 of gas are also set to 150mm, and the height t 4 of gas vent is set to 1.2mm, and across steel band, the gas vent interval t5 of two gas wiping apparatus of subtend is set to 20mm.In addition, the air pressure in gas vent is set to 40kPa.
When carrying out modeling, as shown in Figure 9 b, by the range model (total unit number of model is 2654640) apart from steel band center 1/2nd.Computer picture in the analysis result figure formed, carry out modeled analysis result diagram for Figure 10 a by the conventional example of Figure 11, carries out modeled analysis result diagram for Figure 10 b by the embodiment suitable with the present invention.
In the right end region of Figure 10 a, the flow direction of air oblique upper and right tiltedly inclined downward and flow (this confirm splash larger) to the right, in contrast, in the right areas of Figure 10 b, the ratio of the flow direction of air oblique upper or right tiltedly inclined downward is to the right considerably less, confirms that the generation of splashing is few.
[experiment and its result about steel band plate speed (transfer rate) scope during electroplating processes]
The present inventor etc. have carried out the experiment of the possible range of the relevant steel band plate speed determined when applying the gas wiping apparatus (embodiment) shown in Fig. 3,4 and existing gas wiping apparatus (comparative example) shown in Figure 11 respectively.Specifically, with the thickness of steel band be 0.4mm, the width size that is 1200mm, held the left and right from steel band the gap of gas blow-out mouth end to be set as 0mm, demonstrate and make the adhesion amount as the zinc of plating molten metal become 120g/m on steel band two sides
2plate speed scope.Be explained, although carry out this experiment with the gas wiping apparatus of the embodiment 2 shown in Fig. 5,6, but when the gas wiping apparatus of embodiment 2, the gas rectification effect that tab and erected piece produce can be expected further to the gas wiping apparatus of embodiment 1, therefore at this additionally once, very clear and definite, more prove effective than the experiment effect of the gas wiping apparatus shown in Fig. 3,4.
The result of experiment is shown in table 1 below.In Table 1, zero is that the generation of splashing is not less and to the result of again adhering to of steel band, △ is generation owing to splashing and the attachment that exists to nozzle but not to the result of again adhering to of steel band, × be that the generation of splashing is many and there is the attachment to nozzle and the result of again adhering to steel band.
As shown in table 1, in the gas wiping apparatus of embodiment, at plate speed until the scope of the highest 240mpm carries out logical plate, confirm to splash and again do not adhere on steel band.
On the other hand, in the gas wiping apparatus of comparative example, can expect that the plate speed scope of effect same is until the scope of the highest 180mpm.
Confirm according to this experimental result, compared with the situation of the existing gas wiping apparatus of application, the operation making plate speed fast more than 30% can be carried out.
[table 1]
[verifying experiment and its result of the optimum range in the gap of holding gas blow-out mouth end from the left and right of steel band]
The present inventor etc. make to hold the gap of gas blow-out mouth end to carry out various change from the left and right of steel band further, carry out about producing the size of splashing and the experiment of again adhering to having undirected steel band.In the table 1 described, various condition and experimental result are shown.
According to this experimental result, embodiment is compared with comparative example, and the region high in the former pressure of gas, plate speed is fast all obtains good result.In addition, the experimental result according to embodiment confirms, holds the gap of gas blow-out mouth end to be preferably the scope of 0mm ~ 10mm from the left and right of steel band.
Above, use accompanying drawing to describe in detail embodiments of the present invention, but concrete structure is not limited to this embodiment, can carry out design alteration etc. under the scope not departing from present inventive concept, these are also contained in the present invention.
Nomenclature
1: gas wiping nozzle, 1a: gas blow-out mouth, 1a ': gap, 1b: gas inflow pipe, 1c: rectiblock, 1d: dividing plate, 1e: gas introduction port, 2: occlusion component, 2a: the gas blow-out mouth side end of occlusion component, 3a: tab, 3b: erected piece, 4, 4A: position transducer, 5A: left slide mechanism, 5B: right slide mechanism, 6: pedestal (common-base), 7: pedestal slide mechanism, 8: position transducer slide mechanism, 10, 10A: gas wiping apparatus, M: molten metal (plating bath), K: steel band, Y: plating tank, R: synchronous roller, W1, W2: line, PC: process control computer, CL1: the medullary ray of gas blow-out mouth, CL2: the medullary ray of steel band, ed: the right-hand member edge of steel band
Claims (7)
1. a gas wiping apparatus, it possesses the gas wiping nozzle with cavity steel strip surface jet flow stream being regulated to the adhesion amount of the plating molten metal on this surface, wherein,
It is extended and from the gap of described cavity blow gas that described gas wiping nozzle comprises width along steel band, and have the dividing plate of gas introduction port gas being imported this cavity,
In described gap, be equipped and come the region of inaccessible left and right and the occlusion component of the left and right slid freely along this gap according to width of steel band, and separate this about occlusion component between be formed with gas blow-out mouth,
In described cavity, be equipped with the rectiblock from the respective gas blow-out mouth side end of the occlusion component of described left and right to the extended left and right of described dividing plate, between the rectiblock about this, be formed with gas flow path,
The width of described gas blow-out mouth is identical with the width of described gas flow path.
2. gas wiping apparatus as claimed in claim 1, wherein, the occlusion component of described left and right and the rectiblock synchronous slide of described left and right, with the width of the width of adjustments of gas blow-off outlet and gas flow path.
3. gas wiping apparatus as claimed in claim 1 or 2, wherein, in the described cavity of described gas wiping nozzle, the tab not arriving lower face is fixed with in the upper surface portion of described cavity, the erected piece not arriving upper surface portion is fixed with at the lower face of the position leaving this tab
The gas importing gas flow path from gas introduction port is able to rectification the process flowing through tab and erected piece.
4. gas wiping apparatus as claimed in claim 1 or 2, wherein, the occlusion component of described left and right utilizes left slide mechanism and right slide mechanism respectively and slides freely,
Left slide mechanism and right slide mechanism are equipped on shared pedestal, and this pedestal is connected with pedestal slide mechanism, to slide freely,
The position transducer detecting steel band position is provided with near described gas blow-out mouth,
The occlusion component of left and right utilizes described left slide mechanism and described right slide mechanism to slide, and carrys out the width of adjustments of gas blow-off outlet,
Pedestal slide mechanism makes pedestal slide based on the position data of the steel band detected by described position transducer, the right slide mechanism brought by the slip of pedestal and the slip of left slide mechanism, make the occlusion component of left and right maintain the width of the gas blow-out mouth regulated constant and slide.
5. gas wiping apparatus as claimed in claim 1 or 2, wherein, the occlusion component of described left and right utilizes left slide mechanism and right slide mechanism respectively and slides freely,
The position transducer detecting steel band position is provided with near described gas blow-out mouth,
The occlusion component of left and right utilizes described left slide mechanism and described right slide mechanism to slide, and carrys out the width of adjustments of gas blow-off outlet,
Based on the position data of the steel band detected by described position transducer, it is constant and slide that left slide mechanism and right slide mechanism make the occlusion component of left and right maintain the width of the gas blow-out mouth regulated.
6. gas wiping apparatus as claimed in claim 4, wherein, holds from the left and right of steel band the gap of the occlusion component of left and right gas blow-out mouth side end to be separately adjusted to as identical length s, and is the scope of 0≤s≤10mm.
7. gas wiping apparatus as claimed in claim 5, wherein, holds from the left and right of steel band the gap of the occlusion component of left and right gas blow-out mouth side end to be separately adjusted to as identical length s, and is the scope of 0≤s≤10mm.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011104089 | 2011-05-09 | ||
| JP2011-104089 | 2011-05-09 | ||
| JP2012054183A JP6033558B2 (en) | 2011-05-09 | 2012-03-12 | Gas wiping device |
| JP2012-054183 | 2012-03-12 | ||
| PCT/JP2012/061644 WO2012153702A1 (en) | 2011-05-09 | 2012-05-07 | Gas wiping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103502499A CN103502499A (en) | 2014-01-08 |
| CN103502499B true CN103502499B (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280019830.8A Active CN103502499B (en) | 2011-05-09 | 2012-05-07 | Gas wiping device |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2708616B1 (en) |
| JP (1) | JP6033558B2 (en) |
| KR (1) | KR101416774B1 (en) |
| CN (1) | CN103502499B (en) |
| WO (1) | WO2012153702A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2524406T3 (en) * | 2012-02-21 | 2014-12-09 | Cockerill Maintenance & Ingenierie S.A. | Cleaning nozzle for coating thickness and distribution control with excellent pressure uniformity |
| JP6298355B2 (en) * | 2014-05-15 | 2018-03-20 | Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 | Wiping nozzle for molten metal plating equipment and wiping position control device for molten metal plating equipment |
| JP6899514B2 (en) * | 2017-01-13 | 2021-07-07 | 日鉄エンジニアリング株式会社 | Gas wiping device and gas wiping method |
| CN110923602A (en) * | 2019-12-26 | 2020-03-27 | 江苏英杰光缆科技有限公司 | Optical cable galvanizing process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1283708A (en) * | 1999-08-06 | 2001-02-14 | 川崎制铁株式会社 | Gas wiper and method thereof |
| CN101460648A (en) * | 2006-06-05 | 2009-06-17 | Posco公司 | Gas wiping apparatus |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1023842B (en) * | 1974-08-08 | 1978-05-30 | Italsider Spa | PERFECTED DEVICE FOR BLOWING A BLADE OF AIR AGAINST A TAPE COATED WITH A LAYER OF LIQUID MATERIAL, IN PARTICULAR AGAINST A METALLIC TAPE COVERED WITH A LAYER OF MELTED ZICO |
| JPS52141430A (en) * | 1976-05-21 | 1977-11-25 | Hitachi Ltd | Blow wiping nozzle in continuous hot dipping device for belt plate metal |
| JPH01290755A (en) * | 1988-05-19 | 1989-11-22 | Sumitomo Metal Ind Ltd | Method for preventing edge overcoating of hot-dipped steel sheet |
| JPH03125058U (en) * | 1990-03-27 | 1991-12-18 | ||
| JP4641847B2 (en) * | 2005-03-30 | 2011-03-02 | 新日本製鐵株式会社 | Gas wiping nozzle and gas wiping device |
| JP4781891B2 (en) * | 2006-04-14 | 2011-09-28 | 新日本製鐵株式会社 | Gas wiping device |
-
2012
- 2012-03-12 JP JP2012054183A patent/JP6033558B2/en active Active
- 2012-05-07 KR KR1020137028229A patent/KR101416774B1/en active IP Right Grant
- 2012-05-07 EP EP12782900.0A patent/EP2708616B1/en active Active
- 2012-05-07 WO PCT/JP2012/061644 patent/WO2012153702A1/en active Application Filing
- 2012-05-07 CN CN201280019830.8A patent/CN103502499B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1283708A (en) * | 1999-08-06 | 2001-02-14 | 川崎制铁株式会社 | Gas wiper and method thereof |
| CN101460648A (en) * | 2006-06-05 | 2009-06-17 | Posco公司 | Gas wiping apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2708616A4 (en) | 2014-11-12 |
| EP2708616B1 (en) | 2016-12-07 |
| KR101416774B1 (en) | 2014-07-08 |
| EP2708616A1 (en) | 2014-03-19 |
| KR20130128479A (en) | 2013-11-26 |
| CN103502499A (en) | 2014-01-08 |
| WO2012153702A1 (en) | 2012-11-15 |
| JP6033558B2 (en) | 2016-11-30 |
| JP2012251237A (en) | 2012-12-20 |
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