WO2012153702A1 - ガスワイピング装置 - Google Patents
ガスワイピング装置 Download PDFInfo
- Publication number
- WO2012153702A1 WO2012153702A1 PCT/JP2012/061644 JP2012061644W WO2012153702A1 WO 2012153702 A1 WO2012153702 A1 WO 2012153702A1 JP 2012061644 W JP2012061644 W JP 2012061644W WO 2012153702 A1 WO2012153702 A1 WO 2012153702A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- steel strip
- slide mechanism
- width
- slide
- Prior art date
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
Definitions
- the present invention relates to a gas wiping apparatus that adjusts the amount of molten metal for plating adhered to a surface of a steel strip that is continuously conveyed and immersed in a plating bath by spraying a gas.
- Wiping is generally performed.
- gas wiping is performed by arranging gas wiping devices having gas wiping nozzles on both sides of a continuously transported steel strip and blowing gas to both sides of the steel strip. It is.
- the gas wiping nozzle is immersed in the molten metal of the plating pot and has an elongated shape corresponding to the length in the width direction of the steel strip conveyed upward in front of the nozzle, along the width direction (longitudinal direction).
- a slit-like gas outlet for blowing out gas is formed.
- Patent Document 1 a slit closing mechanism that makes both ends of the slits of both nozzles of a pair of opposed nozzles variable, and the slits
- a gas wiping apparatus having a slit width adjusting mechanism that adjusts both end positions of the steel strip to both end positions of the steel strip and a mechanism that adjusts the gas flow rate so that the discharge flow rate of the nozzle is constant.
- this gas wiping device by adjusting the both end positions of the slits of the pair of nozzles facing each other across the steel strip to the both end positions of the steel strip, a state in which jets from the facing nozzles do not collide violently is formed. This eliminates turbulence caused by the collision between jets, makes the distribution of molten metal on the steel strip surface as uniform as possible, and suppresses the occurrence of splash and overcoat at both ends. .
- FIG. 1 This will be described with reference to the schematic diagram shown in FIG.
- This figure is a simplified gas wiping device W disclosed in Patent Document 1, but in the front, two closing members H, H are slidable (Y1 direction). Accordingly, the width of the central gas outlet E surrounded by the closing members H, H is variably adjusted.
- the gas (X3 direction) introduced from the rear of the gas wiping device W flows forward through the hollow and is discharged from the gas outlet E (X4 direction).
- the gas that has reached H is suddenly contracted toward the center (X5 direction), and the vortex mentioned above is generated by this rapid contraction, and this vortex disturbs the gas flow, and the steel strip Overcoat and splash at the end in the width direction will occur intermittently.
- the present invention has been made in view of the above-described problems, and relates to a gas wiping apparatus including a gas wiping nozzle that adjusts the amount of molten metal for plating adhered to a surface of a steel strip by blowing a gas onto the surface.
- An object of the present invention is to provide a gas wiping device excellent in the effect of suppressing overcoat and splash at the end in the width direction of the steel strip.
- a gas wiping apparatus includes a hollow gas wiping nozzle that blows gas onto the surface of a steel strip and adjusts the amount of molten metal for plating on the surface.
- the gas wiping nozzle includes a slit that extends in the width direction of the steel strip and blows out gas from the hollow, and a partition that includes a gas introduction port that introduces gas into the hollow.
- the slit is provided with a left and right blocking member that closes the left and right regions according to the width of the steel strip and is slidable along the slit, and a gas is provided between the left and right blocking members spaced apart from each other.
- a blower outlet is formed, and in the hollow, left and right rectifying pieces extending from the respective gas blower outlet side end portions of the left and right blocking members to the partition are disposed, and between the left and right rectifying pieces, Gas flow path It made which is one in which the width of the width and the gas flow path of the gas outlet is in the same.
- the gas wiping nozzle that constitutes the gas wiping device of the present invention is a slender slit facing the steel strip and extending in the width direction of the steel strip, closing the left and right areas and slidable along the slit
- the left and right blocking members are disposed, and the gas outlet is formed between the left and right blocking members in the slit, and the width of the gas outlet can be adjusted by sliding the left and right blocking members.
- the sliding forms of the left and right closing members include a form in which both slide in the same amount synchronously, and a form in which only one of the left and right closing members slides. It becomes possible to adjust the width
- the width of the steel strip of about 700 to 1800 mm is adjusted to be the same as the width of the gas outlet, or the width of the gas outlet is increased by about 10 mm from the left and right of the width of the steel strip. There is a case to adjust.
- left and right rectifying pieces extending from the left and right ends of the gas inlet to the gas outlet side ends of the left and right blocking members are disposed, and the left and right rectifying pieces are hollowed by the left and right rectifying pieces. Since the gas flow path is defined, among the gases introduced from the gas introduction port, the gas flowing along the rectifying piece particularly at the left and right ends of the gas flow path is the gas flow of the continuous rectifying piece and the closing member. The gas is smoothly discharged from the gas outlet through the outlet side end.
- the gas that has circulated in the hollow of the gas wiping nozzle is greatly (abruptly) contracted at the gas outlet, and the vortex is periodically generated by this contraction and the vortex disturbs the gas flow. It cannot happen.
- the overcoat and splash at the end in the width direction of the steel strip caused by the gas flow disturbed by the generated vortex can be completely eliminated.
- left and right defines the width direction of the steel strip conveyed upward from the plating pot as the left and right direction, and on the basis of the width direction of the steel strip, the left and right of the steel strip and the left and right of the slit This region is referred to as the right and left ends of the gas inlet.
- the width of the gas flow path defined by the left and right rectifying pieces in the hollow of the gas wiping nozzle and the width of the gas outlet are always kept the same.
- the left and right rectifying pieces slide in the same manner, and the width of the gas flow path and the width of the gas outlet change in the same state. Since the left and right rectifying pieces slide in this way, the rectifying piece in the present embodiment has a structure that is cut off from the partition wall.
- a dripping piece that does not reach the lower surface is fixed to the upper surface, and the lower surface at a position away from the dripping piece is an upper surface.
- the rising piece that does not reach is fixed, and the gas introduced from the gas inlet into the gas flow path is rectified in the process of flowing through the dripping piece and the rising piece.
- the hanging piece and the rising piece are provided at intervals, so that the gas is rectified in the process of flowing through the hanging piece and the rising piece so that the gas pressure and flow velocity are increased. Is made as uniform as possible in the width direction of the gas flow path.
- the left and right closing members are slidable by a left slide mechanism and a right slide mechanism, which are inherent slide mechanisms, respectively, and the left slide mechanism and the right slide
- the mechanism is mounted on a common base, the base is connected to a base slide mechanism and is slidable, and a position sensor for detecting the position of the steel strip is provided in the vicinity of the gas outlet,
- the left and right closing members are slid by the left slide mechanism and the right slide mechanism to adjust the width of the gas outlet, and the base slide mechanism slides the base based on the position data of the steel strip detected by the position sensor,
- the left and right closing members have already been adjusted by the slide of the right slide mechanism and the left slide mechanism by the base slide. It can be exemplified embodiment which is way while sliding maintaining the width of the scan outlet.
- the slide control of the left and right blocking members is performed by the left slide mechanism and the right slide mechanism, which are slide mechanisms unique to each.
- the “slide mechanism” includes a cylinder device that slides the closing member, an electric slider device that slides on the slide substrate, and the like.
- a closing member is attached to the tip of a piston that constitutes the device and slides, and the closing member can be configured to be slidable left and right in accordance with the sliding of the piston.
- the electric slider and the closing member are connected by a wire or the like, and the closing member is configured to be slidable left and right as the electric slider slides left and right on the slide substrate. Can do.
- data relating to the width of the steel strip input to the process computer is transmitted to the left and right slide mechanisms, and the left and right slide mechanisms are slid based on the transmitted data so that the width of the gas outlet is adjusted to a desired width. It has become.
- the steel strip that has been transported from the reduction annealing furnace is immersed in the molten metal in the plating pot, transported vertically upward through the sink roll in the plating pot, A part of the molten metal adhering to both side surfaces of the steel strip is wiped off by the gas blown out from the gas wiping device disposed on both sides of the conveyance path so as to be adjusted to a desired adhesion amount.
- the width of the gas outlet is adjusted to the desired width based on the data related to the width of the steel strip, the steel strip meanders during this transport process and its center line and the center of the gas outlet whose width has already been adjusted Often there is a line shift.
- the left slide mechanism and the right slide mechanism are mounted on a common base, and this base is connected to the base slide mechanism to be slidable. Furthermore, a position sensor for detecting the position of the steel strip is provided in the vicinity of the gas outlet, and the position data of the steel strip from this position sensor (center line position data of the steel strip or position data of the left and right ends of the steel strip)
- the base slide mechanism slides the base so as to correspond to the position of the steel strip without changing the relative positions of the left and right slide mechanisms that define the width of the gas blow-out port by sliding the base as desired. Is.
- this base slide mechanism can also be formed from a cylinder device, an electric slider device, or the like, similarly to the left and right slide mechanisms.
- the position sensor for detecting the position of the steel strip is provided in the vicinity of the gas outlet”
- the position sensor is provided as close as possible to the gas outlet in the vicinity of the gas outlet.
- the “near” is, for example, between the bath surface in the pot and the upper position of the gas wiping device. It covers a relatively wide range.
- the left and right closing members are slidable by a left slide mechanism and a right slide mechanism, which are inherent slide mechanisms, respectively, and the gas outlet Is provided with a position sensor for detecting the position of the steel sheet, and the left and right closing members are slid by the left slide mechanism and the right slide mechanism to adjust the width of the gas outlet and are detected by the position sensor. Based on the position data of the steel plate, the left slide mechanism and the right slide mechanism can slide the left and right closing members while maintaining the already adjusted width of the gas outlet.
- the width of the gas outlet is adjusted by the left slide mechanism and the right slide mechanism in the same manner as in the above-described embodiment, but these left and right slide mechanisms are mounted on a common base.
- the left and right slide mechanisms slide in the same direction by the same amount based on the position information data of the steel strip received from the position sensor, so that the left and right closing members are already adjusted.
- the slide control is performed so as to correspond to the position of the steel strip while maintaining the width.
- gaps from the left and right ends of the steel strip to the respective gas outlet side end portions of the left and right closing members are adjusted to have the same length s, and preferably in the range of 0 ⁇ s ⁇ 10 mm. .
- the gas flow between the gas blower side end portions of the left and right closing members in the slit forming the gas blower outlet and the hollow of the gas wiping nozzle is performed. Due to the extremely simple structural improvement of connecting the right and left rectifying pieces that define the path, the gas that has circulated in the hollow of the gas wiping nozzle is greatly reduced at the gas outlet, and the vortex is periodically generated by this reduced flow. Thus, the vortex does not disturb the gas flow, and the overcoat and splash at the end in the width direction of the steel strip due to the disturbed gas flow can be completely eliminated.
- FIG. 3 is a view taken in the direction of arrows III-III in FIG. 2.
- FIG. 4 is a view taken along arrow IV-IV in FIG. 3.
- FIG. 6 is a view taken along arrow VI-VI in FIG. 5.
- It is a schematic diagram of one Embodiment of the sliding mechanism of a right-and-left obstruction
- (A) is a longitudinal cross-sectional view of an analysis model
- (b) is a bb arrow view of (a).
- (A) is a figure which shows the analysis result of a comparative example
- (b) is a figure which shows the analysis result of an Example.
- the conventional gas wiping apparatus it is a schematic diagram explaining that gas is rapidly contracted by a slidable closing member.
- FIG. 1 schematically shows a molten metal plating apparatus.
- the plating apparatus shown in the figure contains a plating bath made of molten metal M such as molten zinc or molten aluminum, and a sink roll R rotates in a plating pot Y lined with a refractory brick (not shown).
- the steel strip K which is freely arranged and sent from the reduction annealing furnace via a not-illustrated snout or the like, is immersed in the molten metal M and conveyed vertically upward via the sink roll R. (X1 direction).
- the steel strip K conveyed vertically above has molten metal adhered to both side surfaces thereof, but the gas wiping device is disposed above the plating pot Y on both sides of the conveying path of the steel strip K conveyed vertically upward. 10 and 10 are disposed, and a part of the molten metal adhering to both sides of the steel strip K is caused by the gas (air, nitrogen, inert gas, etc.) blown out from these gas wiping devices 10 and 10. It is wiped off and adjusted to a desired amount of adhesion.
- FIG. 2 is a perspective view showing an embodiment of a gas wiping apparatus constituting the plating apparatus of FIG. 1
- FIG. 3 is a view taken along arrow III-III in FIG. 2, and FIG. It is an IV-IV arrow line view.
- the gas wiping device 10 shown in FIGS. 2 to 4 supplies a gas to a hollow gas wiping nozzle 1 and a gas inflow pipe 1b provided behind the gas wiping nozzle 1 and provided in the hollow of the gas wiping nozzle 1. It is generally composed of a gas supply device (gas supply source) (not shown).
- the gas wiping nozzle 1 has a slit 1a ′ (whose total width is T) that extends in the width direction of the steel strip K and blows out gas from the hollow space.
- the left and right blocking members 2 and 2 that are slidable along the slit 1a '(Y1 direction) are disposed, and gas is provided in the slit region between the left and right blocking members 2 and 2 that are separated from each other.
- the blower outlet 1a is formed.
- a gas inflow pipe 1b communicates with the interior of the gas wiping nozzle 1, and a partition wall 1d having a plurality of gas inlets 1e is provided in front of the gas inflow pipe 1b.
- Gas provided from a gas supply device (not shown) is introduced into the gas wiping nozzle 1 via the gas inflow pipe 1b (in the X2 direction), and is introduced into the hollow via the gas inlet 1e.
- left and right rectifying pieces 1c and 1c extending from the gas outlet side end portions 2a and 2a of the left and right closing members 2 and 2 to the partition wall 1d are disposed, A space defined by the left and right rectifying pieces 1c and 1c and the hollow upper and lower surfaces is a gas flow path GR.
- the gas wiping device 10 is configured such that the width t of the gas flow path GR formed between the left and right rectifying pieces 1c and 1c and the width t of the gas outlet 1a are always the same. That is, one end of the right and left rectifying pieces 1c and 1c is fixed in an orthogonal posture with respect to the gas outlet side ends 2a and 2a of the left and right closing members 2 and 2, respectively, and the left and right rectifying pieces 1c and 1c are fixed. Since the other end has a structure completely cut off from the partition wall 1d, both the width t of the gas outlet 1a and the width t of the gas passage GR can be variably adjusted to the same width.
- the width t of the gas outlet 1a can be adjusted by sliding the left and right closing members 2 and 2 (in the Y1 direction).
- the width of the steel strip K changing between about 700 to 1800 mm and the gas outlet 1a
- adjustment forms for adjusting the width t to the same and adjustment forms for adjusting the width t of the gas outlet 1a to be about 10 mm wide from the left and right of the width of the steel strip K. Accordingly, the width t of the gas outlet 1a is adjusted as desired.
- the sliding form of the left and right closing members 2 and 2 includes a form in which both slide in the same amount synchronously and a form in which only one of the left and right closing members slides.
- the gas that has circulated in the hollow of the gas wiping nozzle 1 is rapidly contracted at the gas outlet 1a, and the vortex is periodically generated by the contracted flow, and this vortex disturbs the gas flow. I don't get it. As a result, the overcoat and splash at the end in the width direction of the steel strip caused by the gas flow disturbed by the generated vortex can be completely eliminated.
- FIG. 5 is a cross-sectional view of another embodiment of the gas wiping apparatus and shows a mode corresponding to FIG. 3, and FIG. 6 is a view taken along the line VI-VI in FIG.
- a hanging piece 3a that does not reach the lower surface is fixed to the hollow upper surface in the gas flow path GR, and the hollow lower surface at a position away from the hanging piece 3a does not reach the upper surface.
- the piece 3b is fixed, and the gas introduced into the gas flow path GR from the gas introduction port 1e is rectified in the process of flowing through the dripping piece 3a and the rising piece 3b (X3 ′).
- the other ends of the left and right rectifying pieces 1c and 1c are in front of the rising piece 3b and the dripping piece 3a, and slide in front of them according to the variation in the width of the gas outlet 1a.
- the flow velocity and pressure of the gas introduced from the plurality of gas inlets 1e are made as uniform as possible in the width direction of the gas flow path GR, and the gas having the same flow velocity and pressure is aligned in the width direction of the steel strip K. Will be provided.
- the gas wiping device 10A of the present embodiment among the gases introduced into the gas flow path GR from the plurality of gas introduction ports 1e, the gas flows along the rectifying pieces 1c and 1c, particularly at the left and right ends of the gas flow path GR.
- the gas is smoothly discharged from the gas outlet 1a through the continuous rectifying piece 1c and the gas outlet side end 2a of the closing member 2, and a vortex is generated and the gas flow is disturbed. No action can occur.
- the left and right closing members 2 and 2 are slidable left and right by their own left slide mechanism 5A and right slide mechanism 5B, respectively, and the left slide mechanism 5A and right slide mechanism 5B are common.
- the common base 6 is mounted on the base 6 and is connected to a base slide mechanism 7 so as to be slidable.
- the electric slider that constitutes the left closing member 2 and the left slide mechanism 5A is connected in an annular shape via two pulleys 9 by two wires W1 and W1, and thereby the left slide mechanism 5A slides left and right.
- Z1 direction the left closing member 2 is also slidable to the left and right in synchronization
- Z1 ′ direction the electric slider that constitutes the right closing member 2 and the right slide mechanism 5B is also connected in a substantially annular shape via the pulley 9 by the two wires W2 and W2, and the right slide mechanism 5B slides to the left and right.
- the right closing member 2 is also slidable to the left and right in synchronization (Z2 ′ direction).
- a common base 6 on which the left slide mechanism 5A and the right slide mechanism 5B are mounted is slidable by an electric cylinder constituting the base slide mechanism 7, and defines a gas outlet 1a having a desired width t.
- the base 6 slides with the base slide mechanism 7 with the positions of the left and right slide mechanisms 5A and 5B enabling the sliding of the left and right blocking members 2 and 2 positioned in this manner to meander in the middle of conveyance. Control is performed so that the center line CL2 of the steel strip K and the center line CL1 of the gas outlet 1a coincide with each other.
- two sets of position sensors 4, 4 arranged in the vicinity of the gas outlet 1 a sense the vicinity of the left and right ends of the steel strip K passing through the conveyance path, and this sensing data is transmitted to the base slide mechanism 7. It has become so.
- the center line CL2 of the steel strip K near the gas outlet 1a is determined by the sensing data from the left and right position sensors 4 and 4, and if it does not coincide with the center line CL1 of the gas outlet 1a,
- the base slide mechanism 7 and the base 6 are slid by the difference amount (Z3 direction), and the left and right closing members 2 according to the slide of the base 6 are synchronously slid by the left and right slide mechanisms 5A and 5B. 2 slides, and the center lines CL1 and CL2 of both the gas outlet 1a and the steel strip K are controlled to coincide.
- the position sensor slide mechanism 8 senses the right end ed of the steel strip K while the position sensor slide mechanism 8 slides so as to follow the meandering of the steel strip K, and this sensing data is transmitted to the left and right slide mechanisms 5A and 5B. By sliding the same amount in the same direction, the left and right closing members 2 and 2 slide in the same direction by the same amount so that the right end ed of the steel strip K is positioned at a desired position with respect to the gas outlet 1a. To be controlled.
- FIGS. 9a and 9b The present inventors create an analysis model simulated in FIGS. 9a and 9b in a computer and perform LES turbulence analysis (LES: unsteady turbulence analysis directly calculated without modeling a larger eddy than the analysis cell) Method).
- LES unsteady turbulence analysis directly calculated without modeling a larger eddy than the analysis cell
- FIG. 9b the width t1 of the steel strip is 150 mm
- the inner width t2 of the gas discharge port the gas blowing width t3 is also 150 mm
- the height t4 of the gas discharge port is 1.2 mm
- the gas discharge port interval t5 of the two gas wiping devices was 20 mm.
- the air pressure in the gas discharge port was 40 kPa.
- FIG. 9b In modeling, as shown in FIG. 9b, a half range from the center of the steel strip was modeled (the total number of cells in the model was 2654640).
- FIG. 10a An analysis result diagram modeling the conventional example of FIG. 11 is shown in FIG. 10a, and an analysis result diagram modeling an embodiment corresponding to the present invention is shown in FIG. 10b. Yes.
- the air flow direction is inclined obliquely upward to the right and obliquely downward to the right (this demonstrates that the splash is large), whereas the right direction of FIG.
- the rate of the air flow direction tilting obliquely upward to the right and obliquely downward to the right is remarkably small, and it has been demonstrated that the occurrence of splash is extremely small.
- the present inventors specify a possible range related to the steel strip passing speed when the gas wiping device (example) shown in FIGS. 3 and 4 and the conventional gas wiping device (comparative example) shown in FIG. 11 are applied.
- An experiment was conducted. Specifically, the thickness of the steel strip is 0.4mm, the width is 1200mm, the gap from the left and right ends of the steel strip to the gas outlet end is 0mm, and the amount of zinc that is molten metal for plating is The plate speed range of 120 g / m 2 on both sides of the steel strip was verified. Although this experiment was not performed with the gas wiping apparatus according to the second embodiment shown in FIGS.
- the gas wiping apparatus according to the second embodiment is different from the gas wiping apparatus according to the first embodiment.
- the plate speed range in which the same effect can be expected was a maximum of 180 mpm.
- the examples show good results even in the region where the gas source pressure is high and the plate passing speed is high compared to the comparative example.
- the experimental results of the examples demonstrate that the gap from the left and right ends of the steel strip to the gas outlet end is preferably in the range of 0 mm to 10 mm.
Landscapes
- 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
Description
図1に溶融金属めっき装置を模式図で示している。同図で示すめっき装置は、溶融亜鉛や溶融アルミ等の溶融金属Mからなるめっき浴が収容され、その内側に不図示の耐火煉瓦等がライニングされてなるめっきポットY内にシンクロールRが回転自在に配設され、不図示のスナウト等を介して還元焼鈍炉から送られてきた鋼帯Kが溶融金属M内に浸漬され、シンクロールRを介して鉛直上方に搬送されるようになっている(X1方向)。
図2は、図1のめっき装置を構成するガスワイピング装置の一実施の形態を斜視図で示すものであり、図3は、図2のIII-III矢視図、図4は、図3のIV-IV矢視図である。
図5は、ガスワイピング装置の他の実施の形態の横断面図であって図3に対応する態様で示したものであり、図6は図5のVI-VI矢視図である。
次に、図7を参照し、ガスワイピング装置10を取り上げて左右の閉塞部材のスライド機構の実施の形態1を説明する。
次に、図8を参照し、ガスワイピング装置10を取り上げて左右の閉塞部材のスライド機構の実施の形態2を説明する。
本発明者等は、図9a,bで模擬する解析モデルをコンピュータ内で作成し、LES乱流解析(LES:解析セルよりも大きい渦をモデル化することなく、直接計算する非定常乱流解析手法)をおこなった。図9bで示すように、鋼帯の幅t1は150mm、ガス吐出口の内幅t2、ガスの吹付幅t3も150mmとし、ガス吐出口の高さt4は1.2mm、鋼帯を挟んで対向する2つのガスワイピング装置のガス吐出口間隔t5は20mmとした。また、ガス吐出口内のエア圧は40kPaとした。
本発明者等は、図3,4で示すガスワイピング装置(実施例)と図11で示す従来のガスワイピング装置(比較例)をそれぞれ適用した際の鋼帯通板速度に関する可能範囲を特定する実験をおこなった。具体的には、鋼帯の厚みが0.4mm、幅が1200mmのサイズで、鋼帯の左右端からガス吹出口端部までの隙間を0mmとして、めっき用の溶融金属である亜鉛の付着量を鋼帯の両面に120g/m2となる通板速度範囲を検証した。なお、図5,6で示す実施の形態2にかかるガスワイピング装置にて本実験はおこなっていないものの、実施の形態2のガスワイピング装置の場合には、実施の形態1のガスワイピング装置に対してさらに垂れ片と立上り片によるガスの整流効果が期待できることから、図3,4で示すガスワイピング装置での実験効果よりもより一層高い効果が奏されることは明確であることをここに付言しておく。
本発明者等はさらに、鋼帯の左右端からガス吹出口端部までの隙間を種々変化させて、スプラッシュの発生の大小と、鋼帯への再付着の有無に関して実験をおこなった。既述する表1に各種条件と実験結果を示す。
Claims (6)
- 鋼帯の表面にガスを吹き付けて、該表面のめっき用の溶融金属の付着量を調整する中空のガスワイピングノズルを備えたガスワイピング装置であって、
前記ガスワイピングノズルは、鋼帯の幅方向に延設して前記中空からガスを吹出すスリットと、ガスを該中空に導入するガス導入口を備えた隔壁と、を備えており、
前記スリットには、鋼帯の幅に応じて左右の領域を閉塞するとともに該スリットに沿ってスライド自在な左右の閉塞部材が配設され、かつ、離間した該左右の閉塞部材の間にガス吹出口が形成されており、
前記中空において、前記左右の閉塞部材のそれぞれのガス吹出口側端部から前記隔壁へ延設する左右の整流片が配設され、該左右の整流片の間でガス流路が形成されており、
前記ガス吹出口の幅と前記ガス流路の幅が同じであるガスワイピング装置。 - 前記左右の閉塞部材および前記左右の整流片が同期スライドしてガス吹出口の幅とガス流路の幅を調整する請求項1に記載のガスワイピング装置。
- 前記ガスワイピングノズルの前記中空において、その上面には下面まで届かない垂れ片が固定され、この垂れ片から離れた位置の下面には上面まで届かない立上り片が固定されており、
ガス導入口からガス流路に導入されたガスは、垂れ片と立上り片を流通する過程で整流されるようになっている請求項1または2に記載のガスワイピング装置。 - 前記左右の閉塞部材がそれぞれ、固有のスライド機構である左スライド機構と右スライド機構によってスライド自在となっており、
左スライド機構と右スライド機構が共通のベース上に搭載され、該ベースはベーススライド機構に繋がれてスライド自在となっており、
前記ガス吹出口の近傍には鋼帯の位置を検出する位置センサが設けてあり、
前記左スライド機構と右スライド機構によって左右の閉塞部材がスライドしてガス吹出口の幅が調整され、
前記位置センサにて検出された鋼帯の位置データに基づいてベーススライド機構がベースをスライドさせ、ベースのスライドによる右スライド機構と左スライド機構のスライドによって左右の閉塞部材が既に調整されているガス吹出口の幅を維持したままスライドするようになっている請求項1~3のいずれかに記載のガスワイピング装置。 - 前記左右の閉塞部材がそれぞれ、固有のスライド機構である左スライド機構と右スライド機構によってスライド自在となっており、
前記ガス吹出口の近傍には鋼帯の位置を検出する位置センサが設けてあり、
前記左スライド機構と右スライド機構によって左右の閉塞部材がスライドしてガス吹出口の幅が調整され、
前記位置センサにて検出された鋼帯の位置データに基づいて、左スライド機構と右スライド機構が左右の閉塞部材を既に調整されているガス吹出口の幅を維持したままスライドするようになっている請求項1~3のいずれかに記載のガスワイピング装置。 - 鋼帯の左右端から左右の閉塞部材のそれぞれのガス吹出口側端部までの隙間が同じ長さsとなるように調整されており、0≦s≦10mmの範囲である請求項4または5に記載のガスワイピング装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201280019830.8A CN103502499B (zh) | 2011-05-09 | 2012-05-07 | 气体擦拭装置 |
KR1020137028229A KR101416774B1 (ko) | 2011-05-09 | 2012-05-07 | 가스 와이핑 장치 |
EP12782900.0A EP2708616B1 (en) | 2011-05-09 | 2012-05-07 | Gas wiping device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-104089 | 2011-05-09 | ||
JP2011104089 | 2011-05-09 | ||
JP2012-054183 | 2012-03-12 | ||
JP2012054183A JP6033558B2 (ja) | 2011-05-09 | 2012-03-12 | ガスワイピング装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012153702A1 true WO2012153702A1 (ja) | 2012-11-15 |
Family
ID=47139181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/061644 WO2012153702A1 (ja) | 2011-05-09 | 2012-05-07 | ガスワイピング装置 |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2708616B1 (ja) |
JP (1) | JP6033558B2 (ja) |
KR (1) | KR101416774B1 (ja) |
CN (1) | CN103502499B (ja) |
WO (1) | WO2012153702A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2631013B1 (en) * | 2012-02-21 | 2014-10-01 | Cockerill Maintenance & Ingenierie S.A. | Coating thickness and distribution control wiping nozzle with excellent pressure uniformity |
WO2015174234A1 (ja) * | 2014-05-15 | 2015-11-19 | Primetals Technologies Japan株式会社 | 溶融金属めっき設備のワイピングノズル、及び、溶融金属めっき設備のワイピング位置制御装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6899514B2 (ja) * | 2017-01-13 | 2021-07-07 | 日鉄エンジニアリング株式会社 | ガスワイピング装置及びガスワイピング方法 |
CN110923602A (zh) * | 2019-12-26 | 2020-03-27 | 江苏英杰光缆科技有限公司 | 一种光缆镀锌工艺 |
WO2024208536A1 (en) * | 2023-04-06 | 2024-10-10 | Asml Netherlands B.V. | Nozzle for providing a gas flow and method of making the nozzle |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52141430A (en) * | 1976-05-21 | 1977-11-25 | Hitachi Ltd | Blow wiping nozzle in continuous hot dipping device for belt plate metal |
JPH01290755A (ja) * | 1988-05-19 | 1989-11-22 | Sumitomo Metal Ind Ltd | 溶融メッキ鋼板のエッジオーバーコート防止方法 |
JPH03125058U (ja) * | 1990-03-27 | 1991-12-18 | ||
JP2007284732A (ja) | 2006-04-14 | 2007-11-01 | Nippon Steel Corp | ガスワイピング装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1023842B (it) * | 1974-08-08 | 1978-05-30 | Italsider Spa | Dispositivo perfezionato per insufflare una lama d aria contro un nastro rivestito da uno strato di materiale liquido, in particolare contro un nastro metallico rivestito da uno strato di zico fuso |
JP3788122B2 (ja) * | 1999-08-06 | 2006-06-21 | Jfeスチール株式会社 | ガスワイピング装置 |
JP4641847B2 (ja) * | 2005-03-30 | 2011-03-02 | 新日本製鐵株式会社 | ガスワイピングノズル及びガスワイピング装置 |
KR100775226B1 (ko) * | 2006-06-05 | 2007-11-12 | 주식회사 포스코 | 강판 용융도금 라인의 에어 나이프 |
-
2012
- 2012-03-12 JP JP2012054183A patent/JP6033558B2/ja active Active
- 2012-05-07 KR KR1020137028229A patent/KR101416774B1/ko active IP Right Grant
- 2012-05-07 WO PCT/JP2012/061644 patent/WO2012153702A1/ja active Application Filing
- 2012-05-07 EP EP12782900.0A patent/EP2708616B1/en active Active
- 2012-05-07 CN CN201280019830.8A patent/CN103502499B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52141430A (en) * | 1976-05-21 | 1977-11-25 | Hitachi Ltd | Blow wiping nozzle in continuous hot dipping device for belt plate metal |
JPH01290755A (ja) * | 1988-05-19 | 1989-11-22 | Sumitomo Metal Ind Ltd | 溶融メッキ鋼板のエッジオーバーコート防止方法 |
JPH03125058U (ja) * | 1990-03-27 | 1991-12-18 | ||
JP2007284732A (ja) | 2006-04-14 | 2007-11-01 | Nippon Steel Corp | ガスワイピング装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2708616A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2631013B1 (en) * | 2012-02-21 | 2014-10-01 | Cockerill Maintenance & Ingenierie S.A. | Coating thickness and distribution control wiping nozzle with excellent pressure uniformity |
WO2015174234A1 (ja) * | 2014-05-15 | 2015-11-19 | Primetals Technologies Japan株式会社 | 溶融金属めっき設備のワイピングノズル、及び、溶融金属めっき設備のワイピング位置制御装置 |
JP2015218345A (ja) * | 2014-05-15 | 2015-12-07 | Primetals Technologies Japan株式会社 | 溶融金属めっき設備のワイピングノズル、及び、溶融金属めっき設備のワイピング位置制御装置 |
US9951407B2 (en) | 2014-05-15 | 2018-04-24 | Primetals Technologies Japan, Ltd. | Wiping nozzle of hot-dip metal plating equipment and wiping position control device for hot-dip metal plating equipment |
Also Published As
Publication number | Publication date |
---|---|
EP2708616A1 (en) | 2014-03-19 |
EP2708616B1 (en) | 2016-12-07 |
CN103502499B (zh) | 2015-03-25 |
EP2708616A4 (en) | 2014-11-12 |
KR20130128479A (ko) | 2013-11-26 |
CN103502499A (zh) | 2014-01-08 |
KR101416774B1 (ko) | 2014-07-08 |
JP6033558B2 (ja) | 2016-11-30 |
JP2012251237A (ja) | 2012-12-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6033558B2 (ja) | ガスワイピング装置 | |
JP4641847B2 (ja) | ガスワイピングノズル及びガスワイピング装置 | |
JP6561010B2 (ja) | 溶融金属めっき設備及び方法 | |
JP4834559B2 (ja) | リフロー炉 | |
KR101367291B1 (ko) | 가스 와이핑 장치 | |
SE527507C2 (sv) | En anordning och ett förfarande för stabilisering av ett metalliskt föremål samt en användning av anordningen | |
TW201344136A (zh) | 橫式熱處理裝置 | |
JP6304395B2 (ja) | 溶融めっき鋼板の冷却装置 | |
CA2861950C (en) | Coating thickness and distribution control wiping nozzle with excellent pressure uniformity | |
JP2016204694A (ja) | 溶融金属めっき鋼帯の製造装置及び製造方法 | |
JP5766851B1 (ja) | ガスワイピング装置 | |
JP4720198B2 (ja) | 厚鋼板の冷却装置および冷却方法 | |
KR101988751B1 (ko) | 강판 냉각 장치 | |
JP2008174827A (ja) | 電気メッキ処理システムに用いられるガイド装置 | |
KR101353547B1 (ko) | 용융 아연 도금 설비의 냉각장치 | |
JP2013185217A (ja) | 鋼帯の冷却装置 | |
JP2015229790A (ja) | ガスワイピングシステム | |
WO2021059808A1 (ja) | スナウトシール装置 | |
JP2012026022A (ja) | ガスワイピング装置 | |
JP2596240B2 (ja) | 連続溶融金属めっき装置 | |
JP2005279764A (ja) | 鋼板の冷却方法 | |
JPS63192825A (ja) | 連続焼鈍炉用ガスジエツト冷却帯 | |
JP2019188417A (ja) | 噴流式はんだ付け装置 | |
JP2009114534A (ja) | ガスワイピング装置 | |
JP2015208725A (ja) | 塗装装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12782900 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20137028229 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REEP | Request for entry into the european phase |
Ref document number: 2012782900 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012782900 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: IDW00201305676 Country of ref document: ID |