Liquid removal device and rolling facility

Abstract

To provide a liquid removal device which can remove a liquid on a surface of a metal strip more efficiently, and to provide a rolling facility.SOLUTION: A liquid removal device removes a liquid from a surface of a metal strip rolled by a rolling machine including a pair of work rolls and includes a first member which is provided so as to extend along a plate width direction of the metal strip at the outlet side of the rolling machine and form a gap between itself and an upper surface of the metal strip. A surface of the first member includes a curve surface in which a distance from the upper surface of the metal strip increases toward the downstream side in a traveling direction of the metal strip.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a liquid removal device and a rolling facility.

Background Art

[0002] For the purpose of preventing the temperature rise of the work roll during the rolling of the metal strip in a rolling mill, a liquid such as a coolant is usually supplied to the work roll of the rolling mill. Although the liquid such as the coolant supplied to the work roll may adhere to the metal strip, the liquid adhering to the surface of the metal strip may cause stains and may lead to a deterioration in product quality. For this reason, a device for removing the liquid adhering to the metal strip has been proposed.

[0003] Patent Document 1 describes a draining device (liquid removal device) in which a roll wiper and an air wiper are provided in this order on the downstream side of the rolling mill in the traveling direction of the metal strip. The roll wiper includes a pair of rolls provided above and below the metal strip, and removes the coolant from the traveling metal strip by sandwiching the metal strip with this pair of rolls. The air wiper blows air from above, below, or the side of the metal strip to blow off and remove the coolant on the surface of the metal strip that could not be completely removed by the roll wiper.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when removing the liquid adhering to the surface of the metal strip with a jet flow from a gas jetting section such as an air wiper, for example, like the draining device described in Patent Document 1, since high-pressure gas is sprayed onto the surface of the metal strip, the power and noise for operating the gas jetting section may increase.

[0006] In view of the above circumstances, at least one embodiment of the present invention aims to provide a liquid removing device and a rolling facility capable of more efficiently removing the liquid on the surface of the metal strip.

Means for Solving the Problems

[0007] The liquid removing device according to at least one embodiment of the present invention is a liquid removing device for removing liquid from the surface of a metal strip rolled by a rolling mill including a pair of work rolls, comprising a first member provided so as to extend along the width direction of the metal strip on the outlet side of the rolling mill and to form a gap between the first member and the upper surface of the metal strip, wherein the surface of the first member includes a curved surface whose distance from the upper surface of the metal strip increases toward the downstream side in the traveling direction of the metal strip.

[0008] Further, the rolling facility according to at least one embodiment of the present invention is a rolling mill including a pair of work rolls for rolling a metal strip, and the above-described liquid removing device configured to remove liquid from the surface of the metal strip, and includes.

Advantages of the Invention

[0009] According to at least one embodiment of the present invention, there are provided a liquid removing device and a rolling facility capable of more efficiently removing the liquid on the surface of the metal strip.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0011] Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples.

[0012] FIG. 1 is a schematic diagram of a rolling facility equipped with a liquid removal device according to some embodiments. As shown in FIG. 1, a rolling facility 1 according to an embodiment includes a rolling mill 4 including work rolls 2 (rolling rolls) for rolling a metal strip S, and a liquid removal device 10 provided on the downstream side of the work rolls 2 in the conveyance direction of the metal strip S. As shown in FIG. 1, the rolling facility 1 may include a winding device 8 for winding the metal strip S rolled by the work rolls 2, and may include a guide roll 6 provided between the work rolls 2 and the winding device 8 for guiding the metal strip S to the winding device 8. The liquid removal device 10 may be provided between the work rolls 2 and the winding device 8 in the traveling direction (conveyance direction) of the metal strip S.

[0013] In the rolling mill 4, rolling is performed while supplying a liquid coolant to the work rolls 2 to cool the work rolls 2. For this reason, the coolant adheres to the surface of the rolled metal strip S. Alternatively, the coolant is drawn from the outside of the work rolls 2 to the surface of the metal strip S, and the coolant adheres to the surface of the metal strip S. The liquid removal device 10 is configured to remove liquid such as coolant from the surface of the metal strip S.

[0014] The metal strip S to be rolled by the rolling equipment 1 may be not only ordinary steel but also a strip of metal or alloy such as aluminum or copper.

[0015] As shown in FIG. 1, the liquid removing device 10 includes a first member 12 (to be described in detail later) provided on the outlet side of the rolling mill 4 (i.e., the downstream side of the rolling mill 4 in the advancing direction of the metal strip S). The liquid removing device 10 may include a gas ejection part 24 configured to eject gas toward the region on the downstream side of the first member 12 in the advancing direction of the metal strip S. Further, the liquid removing device 10 may include a contact wiping part 26 provided on the upstream side of the first member 12 in the advancing direction of the metal strip S.

[0016] FIG. 2 and FIG. 3 are schematic views of the liquid removing device 10 according to an embodiment, respectively. The first member 12 of the liquid removing device 10 is provided on the outlet side of the rolling mill 4 so as to extend along the plate width direction of the metal strip S (i.e., along the axial direction of the work roll 2), and a gap G (see FIGS. 2 and 3) is formed between the first member 12 and the upper surface Sa of the metal strip S. The first member may be provided so as to extend along the plate width direction over the entire width of the metal strip S. The first member 12 may be a stationary member. The first member 12 may be supported by a stationary part (such as the foundation on which the rolling mill 4 is installed) by a support part (not shown).

[0017] As shown in FIGS. 1 to 3, the surface of the first member 12 includes a curved surface 13 in which the distance d (see FIGS. 2 and 3) from the upper surface Sa of the metal strip S increases toward the downstream side in the advancing direction of the metal strip S. The curved surface 13 includes a closest part 13a that is closest to the upper surface Sa of the metal strip S among the surfaces of the first member 12. That is, the distance d0 between the closest part 13a and the upper surface Sa of the metal strip S is the minimum value of the above-mentioned distance d. The curved surface 13 includes a convex curved surface toward the upper surface of the metal strip S.

[0018] In the exemplary embodiment shown in FIG. 2, the first member 12 is a member having a cylindrical shape. The cylindrical first member 12 is provided such that the central axis of the cylindrical shape extends along the plate width direction of the metal strip S (or the axial direction of the work roll 2). Further, the side surface of the cylindrical first member 12 constitutes the above-described curved surface 13.

[0019] In the exemplary embodiment shown in FIG. 3, the first member 12 is a curved plate-like member. The surface of the plate-like member constitutes the above-described curved surface 13.

[0020] The shape of the first member 12 is not limited to these. For example, the first member 12 may have a streamline shape or an airfoil shape.

[0021] In the above-described embodiment, a gap G is provided between the first member 12 and the metal strip S, and the surface of the first member 12 has a curved surface 13 such that the distance d from the metal strip S increases toward the downstream side. Therefore, due to the Coandă effect, the air flow passing through the gap G (that is, the air flow that moves together with the metal strip S being conveyed by viscous friction (refer to the arrow A1 indicating the air flow in FIGS. 2 and 3)) flows along the curved surface 13 (refer to the arrow A2 indicating the air flow in FIGS. 2 and 3). By this air flow, the liquid C is peeled off from the surface of the metal strip S and wound up as shown in FIG. 2. Therefore, the wound-up liquid C can be easily blown off by the air flow from the gas ejection portion 24 (such as an air wiper). Thus, compared with the conventional gas ejection portion that blows off the liquid remaining attached to the surface of the metal strip S, the liquid can be removed efficiently. For this reason, the power and noise of the gas ejection portion 24 can be reduced. Note that the Coandă effect refers to a phenomenon in which a high-speed fluid near a curved surface changes the direction of flow along the curved surface in the direction of fluid travel.

[0022] The first member 12 may be provided such that the size of the gap G (the minimum distance between the first member 12 and the metal strip S, that is, the distance d0 between the closest portion 13a and the metal strip S) is about 1 mm or less.

[0023] The curved surface 13 of the first member 12 may have a constant radius of curvature, or may be a curved surface whose radius of curvature gradually changes. In the exemplary embodiment shown in FIG. 2, since the curved surface 13 is the side surface of a cylindrical shape, the radius of curvature of the curved surface 13 is substantially constant at R1. In the exemplary embodiment shown in FIG. 3, the radius of curvature of the curved surface 13 gradually decreases from the radius of curvature R2 at the closest portion 13a toward the downstream side. In FIG. 3, the radius of curvature at the most downstream position of the curved surface 13 is R3.

[0024] In some embodiments, the radius of curvature of the curved surface 13 of the first member 12 may be 5 times or more and 50 times or less the size of the gap G between the upper surface Sa of the metal strip S and the first member 12.

[0025] According to the above-described embodiment, since the radius of curvature of the curved surface 13 of the first member 12 is 5 times or more and 50 times or less the size of the gap G between the metal strip S and the first member 12, an air flow along the curved surface 13 due to the Coandă effect is easily formed. Therefore, due to this air flow, the liquid is easily peeled off from the surface of the metal strip S and is easily lifted up, so that the lifted liquid can be easily blown off by the air flow from the gas ejection portion 24.

[0026] In some embodiments, the radius of curvature of the curved surface 13 of the first member 12 may be 1 mm or more and 100 mm or less.

[0027] According to the above-described embodiment, since the radius of curvature of the curved surface 13 of the first member 12 is 1 mm or more and 100 mm or less, an air flow along the curved surface 13 due to the Coandă effect is easily formed. Therefore, due to this air flow, the liquid is easily peeled off from the surface of the metal strip S and is easily lifted up, so that the lifted liquid can be easily blown off by the air flow from the gas ejection portion 24.

[0028] FIG. 4 is a schematic view of a liquid removal device 10 according to an embodiment. In some embodiments, as shown in FIG. 4 for example, the liquid removal device 10 is provided between the upper surface Sa of the metal strip S and the first member 12, and includes a gap maintaining member 14 for regulating the position of the first member 12 with respect to the metal strip S (the position in the thickness direction of the metal strip S) so that the gap G is maintained.

[0029] In the exemplary embodiment shown in FIG. 4, the gap maintaining member 14 is attached to the lower end of a holding ring 16 that holds the first member 12. The first member 12 may be provided so as to penetrate through a pair of holding rings 16 that are spaced apart from each other in the plate width direction (or the axial direction of the work roll 2), and may be held by the pair of holding rings 16. By providing the gap maintaining member 14 at the lower end of each of the pair of holding rings 16, the gap G between the first member 12 and the metal strip S can be maintained more stably.

[0030] In the exemplary embodiment shown in FIG. 4, the holding ring 16 is supported by a support frame 18 that extends along the plate width direction. The distance between the pair of holding rings 16 in the plate width direction may be made changeable according to the width of the metal strip S. For this reason, the holding ring 16 may be supported by the support frame 18 so as to be movable along the plate width direction.

[0031] In the exemplary embodiment shown in FIG. 4, a biasing member 22 for biasing the first member 12 toward the metal strip S is provided. The biasing member 22 shown in FIG. 4 includes a spring provided between the first member 12 and a pressing portion 20 provided above the first member 12. By appropriately adjusting the position of the pressing portion 20 in the vertical direction to expand and contract the biasing member 22, the first member 12 and the gap maintaining member 14 can be pressed toward the metal strip S via the biasing member 22.

[0032] In the above-described embodiment, since the gap maintaining member 14 is provided between the upper surface Sa of the metal strip S and the first member 12, the gap G between the first member 12 and the metal strip S can be more reliably formed. For this reason, an air flow through the gap G can be more reliably formed during the conveyance of the metal strip S, and an air flow flowing along the curved surface 13 of the first member 12 can be more reliably formed by the Coanda effect. Therefore, the liquid on the surface of the metal strip S is easily peeled off and lifted by the air flow along the curved surface 13 of the first member 12, and the liquid can be removed more efficiently by the gas ejection portion 24.

[0033] The friction coefficient between the gap maintaining member 14 and the metal strip S may be smaller than the friction coefficient between the metal strip S and the first member 12. Further, the gap maintaining member 14 may be formed of a graphite fiber reinforced resin composite material. The graphite fiber reinforced resin composite material may include a graphite fiber reinforced polyimide resin composite material (PGFC: polyimide graphite fiber reinforced composite).

[0034] In this case, since the friction coefficient of the gap maintaining member 14 is relatively small, it is difficult for the gap maintaining member 14 and the metal strip S to come into contact with each other without scratching the metal strip S. Therefore, the liquid on the surface of the metal strip S can be removed more efficiently while suppressing a decrease in product quality.

[0035] Also, as described above, the liquid removing device 10 may include a biasing member 22 for biasing the first member 12 toward the metal strip S.

[0036] In this case, with the gap maintaining member 14 provided between the metal strip S and the first member 12, the first member 12 is biased toward the metal strip S by the biasing member 22. Therefore, even if the metal strip S vibrates or the plate thickness changes, the gap G between the metal strip S and the first member 12 can be easily maintained at a constant size. Therefore, an air flow through the gap G can be more reliably formed during the conveyance of the metal strip S, and an air flow flowing along the curved surface 13 of the first member 12 can be more reliably formed by the Coanda effect.

[0037] The gas ejection part 24 may include a gas nozzle configured to eject gas (such as air) toward the downstream region of the first member 12. The gas ejection part 24 may be configured to eject gas toward the region immediately after the first member 12 in the traveling direction of the metal strip S, or may be configured to eject gas toward the first member 12.

[0038] In one embodiment, when the length of the curved surface 13 of the first member 12 in the traveling direction of the metal strip S is D1 (see FIGS. 1 to 3), and the distance in the traveling direction of the metal strip S between the tip of the gas ejection part 24 (such as a gas nozzle) and the closest part 13a of the first member 12 is D2 (see FIG. 1), D2 may be 1.5 times or more and 3 times or less of D1. By setting the above-mentioned distance D2 to be 1.5 times or more and 3 times or less of D1, it becomes easier to spray gas into the region (the region slightly downstream of the first member 12) where the liquid that has been peeled off and lifted up from the surface of the metal strip S due to the above-mentioned Coanda effect is likely to stay, and it becomes easier to blow off the liquid. Also, if D2 is 3 times or less, it is possible to suppress an increase in the ejection pressure and ejection amount of the gas from the gas ejection part 24, and it becomes easier to efficiently remove the liquid.

[0039] The wiping part 26 provided on the upstream side of the first member 12 is provided so as to extend along the plate width direction of the metal strip S (or the axial direction of the work roll 2) and to contact the upper surface Sa of the metal strip S. The wiping part 26 may be a wiper having a flat surface that contacts the surface of the metal strip S (see FIG. 1), or may be a roller-type wiper having a cylindrical shape and being rotated by friction with the conveyed metal strip S.

[0040] A contact wiping section 26 that contacts the metal strip S is provided on the downstream side of the rolling mill 4 and on the upstream side of the first member 12. As a result, the metal strip S with a certain amount of surface liquid reduced by the wiping section 26 passes through the first member 12. Therefore, due to the Coanda effect described above, the liquid on the surface of the metal strip S is more easily peeled off and lifted up by the air flow flowing along the curved surface 13 of the first member 12. For this reason, the liquid thus lifted up can be easily blown off by the air flow from the gas ejection section 24, and the liquid can be efficiently removed.

[0041] The content described in each of the above embodiments is understood as follows, for example.

[0042] [1] The liquid removal device (10) according to at least one embodiment of the present invention is a liquid removal device for removing liquid from the surface of a metal strip (S) rolled by a rolling mill (4) including a pair of work rolls (2), comprising a first member (12) provided so as to extend along the plate width direction of the metal strip on the outlet side of the rolling mill and so that a gap (G) is formed between the first member and the upper surface (Sa) of the metal strip, The surface of the first member includes a curved surface (13) in which the distance (d) from the upper surface of the metal strip increases toward the downstream side in the traveling direction of the metal strip.

[0043] According to the configuration of [1] above, a gap is provided between the first member and the metal strip, and the surface of the first member has a curved surface such that the distance from the metal strip increases toward the downstream side. Therefore, due to the Coanda effect, the air flow passing through the gap (the air flow that moves together with the metal strip due to viscous friction during the conveyance of the metal strip) flows along the curved surface. By this air flow, the liquid is peeled off and lifted from the surface of the metal strip. Therefore, the lifted liquid can be easily blown off by the air flow from the gas ejection section (such as an air wiper). Thus, compared with a conventional gas ejection section that blows off the liquid adhering to the surface of the metal strip, the liquid can be removed more efficiently. For this reason, the power and noise of the gas ejection section can be reduced.

[0044] [2] In some embodiments, in the configuration of [1] above, the liquid removal device is provided between the upper surface of the metal strip and the first member, and includes a gap maintaining member (14) for regulating the position of the first member with respect to the metal strip so that the gap is maintained.

[0045] According to the configuration of [2] above, since a gap maintaining member is provided between the upper surface of the metal strip and the first member, a gap can be more reliably formed between the first member and the metal strip. Therefore, an air flow through the gap can be more reliably formed during the conveyance of the metal strip, and an air flow flowing along the curved surface of the first member can be more reliably formed by the Coandă effect. Thus, the liquid on the surface of the metal strip can be peeled off and lifted up more easily by the air flow along the curved surface of the first member, and the liquid can be removed more efficiently by the gas ejection portion.

[0046] Note that by providing the gap maintaining member only at the widthwise end portions of the metal strip S, the first member can be supported in a state where a gap is formed between the first member and the metal strip S. And the end portions of the metal strip S are not applied as products. Therefore, as described above, by providing the gap maintaining member only at the end portions, the liquid on the surface of the metal strip can be removed more efficiently while suppressing a decrease in product quality.

[0047] [3] In some embodiments, in the configuration of [2] above, the friction coefficient between the gap maintaining member and the metal strip is smaller than the friction coefficient between the metal strip and the first member.

[0048] According to the configuration of [3] above, since the friction coefficient of the gap maintaining member is relatively small, it is difficult for the gap maintaining member and the metal strip to contact and cause scratches on the metal strip. Therefore, the liquid on the surface of the metal strip can be removed more efficiently while suppressing a decrease in product quality.

[0049] [4] In some embodiments, in the configuration of [2] or [3] above, The gap maintaining member is formed of a graphite fiber reinforced resin composite material.

[0050] According to the configuration of [4] above, since the gap maintaining member is formed of a graphite fiber reinforced resin composite material and has a much smaller coefficient of friction, it is difficult for the gap maintaining member to scratch the metal belt even when they come into contact. Also, because of its high hardness, by providing the gap maintaining member only in a narrow area at the widthwise end of the metal belt S, the first member can be properly supported with a gap formed between the first member and the metal belt S. Therefore, while suppressing a decrease in product quality, the liquid on the surface of the metal belt can be removed more efficiently.

[0051] [5] In some embodiments, in any of the configurations of [2] to [4] above, the liquid removing device includes a biasing member (22) for biasing the first member toward the metal belt.

[0052] According to the configuration of [5] above, with a gap maintaining member provided between the metal belt and the first member, the first member is biased toward the metal belt by the biasing member. Therefore, even if the metal belt vibrates or its plate thickness changes, it is easy to maintain the gap between the metal belt and the first member at a constant size. Thus, an air flow through the gap can be more reliably formed during the conveyance of the metal belt, and an air flow flowing along the curved surface of the first member can be more reliably formed by the Coanda effect.

[0053] [6] In some embodiments, in any of the configurations of [1] to [5] above, the radius of curvature of the curved surface of the first member is 5 times or more and 50 times or less the size of the gap between the upper surface of the metal belt and the first member.

[0054] According to the configuration of [6] above, since the radius of curvature of the curved surface of the first member is 5 times or more and 50 times or less the size of the gap between the metal strip and the first member, an air flow along the curved surface due to the Coandă effect is likely to be formed. Therefore, due to this air flow, the liquid is easily peeled off from the surface of the metal strip and lifted up, so that the lifted liquid can be easily blown off by the air flow from the gas ejection part (such as an air wiper).

[0055] [7] In some embodiments, in any of the configurations of [1] to [6] above, The first member has a cylindrical shape.

[0056] According to the configuration of [7] above, since the first member has a cylindrical shape, an air flow along the curved surface (the side surface of the cylinder) due to the Coandă effect is likely to be formed. Therefore, due to this air flow, the liquid is easily peeled off from the surface of the metal strip and lifted up, so that the lifted liquid can be easily blown off by the air flow from the gas ejection part (such as an air wiper).

[0057] [8] In some embodiments, in any of the configurations of [1] to [7] above, The liquid removing device,[[]] includes a gas ejection part (14) configured to eject gas toward a region on the downstream side of the first member in the advancing direction.

[0058] According to the configuration of [8] above, since the gas is ejected from the gas ejection part toward the region on the downstream side of the first member, the liquid peeled off from the surface of the metal strip and lifted up by the air flow along the curved surface of the first member by the above-mentioned Coandă effect can be easily blown off by the air flow from the gas ejection part. Thereby, the liquid can be removed efficiently.

[0059] [9] In some embodiments, in any of the configurations of [1] to [8] above, The liquid removing device,[[]] A wiping part (16) is provided so as to extend along the width direction of the metal strip and to contact the upper surface of the metal strip on the downstream side of the rolling mill and on the upstream side of the first member in the advancing direction.

[0060] According to the configuration of [9] above, since a wiping part that contacts the metal strip is provided on the downstream side of the rolling mill and on the upstream side of the first member, the metal strip with a certain degree of reduction of the liquid on the surface thereof passes through the first member by the wiping part. Therefore, due to the Coandă effect described above, the liquid is peeled off from the surface of the metal strip and is easily lifted up by the air flow flowing along the curved surface of the first member. For this reason, the liquid thus lifted up can be easily blown off by the air flow from the gas ejection part, and the liquid can be removed efficiently.

[0061]

[10] The rolling equipment (1) according to at least one embodiment of the present invention includes a pair of work rolls (2) and a rolling mill (4) for rolling a metal strip (S), and a liquid removing device (10) according to any one of [1] to [9] above configured to remove liquid from the surface of the metal strip. is provided.

[0062] According to the configuration of

[10] above, a gap is provided between the first member and the metal strip, and the surface of the first member has a curved surface such that the distance from the metal strip increases toward the downstream side. Therefore, due to the Coandă effect, the air flow passing through the gap (the air flow that moves together with the metal strip due to viscous friction during the conveyance of the metal strip) flows along the curved surface. By this air flow, the liquid is peeled off from the surface of the metal strip and lifted up. Therefore, the lifted liquid can be easily blown off by the air flow from the gas ejection part (such as an air wiper). Thus, compared with the conventional gas ejection part that blows off the liquid adhering to the surface of the metal strip, the liquid can be removed more efficiently. For this reason, the power and noise of the gas ejection part can be reduced.

[0063] The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and also includes forms obtained by modifying the above-described embodiments and forms obtained by appropriately combining these forms.

[0064] In this specification, expressions indicating relative or absolute arrangements such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric", or "coaxial" not only strictly represent such arrangements, but also represent states in which there are tolerances or relative displacements with angles and distances that can obtain the same function. For example, expressions indicating that things such as "identical", "equal", and "homogeneous" are in an equal state not only strictly represent an equal state, but also represent states in which there are tolerances or differences that can obtain the same function. Also, in this specification, expressions indicating shapes such as a rectangular shape or a cylindrical shape not only represent shapes such as a rectangular shape or a cylindrical shape in a geometrically strict sense, but also represent shapes including concave and convex portions, chamfered portions, etc. within a range where the same effect can be obtained. Also, in this specification, the expressions "comprising", "including", or "having" for a component are not exclusive expressions that exclude the existence of other components.

Explanation of Reference Numerals

[0065] 1 Rolling Equipment 2 Work Roll 4 Rolling Mill 6 Guide Roll 8 Take-up Device 10 Liquid Removal Device 12 First Member 13 Curved Surface 13a Nearest Portion 14 Gap Maintaining Member 16 Holding Ring 18 Support Frame 20 Pressing Portion 22 Biasing Member 24 Gas Jetting Portion 26 Wiping Portion A1 Air Flow A2 Air Flow C Liquid G Gap S Metal strip Sa Upper surface d Distance d0 Distance

Claims

1. A liquid removing device for removing liquid from the surface of a metal strip rolled by a rolling mill including a pair of work rolls, comprising a first member provided so as to extend along the width direction of the metal strip on the outlet side of the rolling mill and with a gap formed between the first member and the upper surface of the metal strip, wherein the surface of the first member includes a curved surface in which the distance from the upper surface of the metal strip increases toward the downstream side in the traveling direction of the metal strip Liquid removing device.

2. comprising a gap maintaining member provided between the upper surface of the metal strip and the first member for regulating the position of the first member with respect to the metal strip so as to maintain the gap The liquid removing device according to claim 1.

3. wherein the friction coefficient between the gap maintaining member and the metal strip is smaller than the friction coefficient between the metal strip and the first member The liquid removing device according to claim 2.

4. wherein the gap maintaining member is formed of a graphite fiber reinforced resin composite material The liquid removing device according to claim 2 or 3.

5. comprising a biasing member for biasing the first member toward the metal strip The liquid removing device according to claim 2 or 3.

6. wherein the radius of curvature of the curved surface of the first member is 5 times or more and 50 times or less the size of the gap between the upper surface of the metal strip and the first member The liquid removing device according to any one of claims 1 to 3.

7. wherein the first member has a cylindrical shape The liquid removing device according to any one of claims 1 to 3.

8. comprising a gas ejection part configured to eject gas toward a region on the downstream side of the first member in the traveling direction The liquid removing device according to any one of claims 1 to 3.

9. A wiping portion provided so as to extend along the width direction of the metal strip and to contact the upper surface of the metal strip on the downstream side of the rolling mill and the upstream side of the first member in the advancing direction. The liquid removing device according to any one of claims 1 to 3.

10. A rolling mill including a pair of work rolls for rolling a metal strip, The liquid removing device according to any one of claims 1 to 3, configured to remove liquid from the surface of the metal strip, A rolling facility comprising the same.

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