JP4172264B2 - Roll surface foreign material removal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roll surface foreign matter removing apparatus used in a high temperature atmosphere.
[0002]
[Prior art]
In the cold rolling or molten metal (zinc, aluminum, etc.) plating process, if foreign matter (metal scraps, etc.) adheres to the roll that transports the steel plate, the surface of the steel plate is likely to be damaged due to this foreign matter. If surface scratches occur, the product becomes defective and loses its value. Therefore, a roll foreign matter removing device for removing foreign matters on the roll surface is installed in the production line.
[0003]
Patent Document 1 discloses a structure in which a blade tip having a predetermined thickness is pressed against a roll surface and foreign matter is removed by the frictional force. Further, in Patent Document 2, in a roll cleaning device used in a high temperature atmosphere, a heat-resistant blade that can contact the tip of the roll, a holding means that holds the blade in an exchangeable manner, and a support for the holding means. There is disclosed a heat-resistant structure that includes a support body that has a hollow portion and through which the cooling medium can be fed. Furthermore, Patent Document 3 discloses a doctor blade having a structure in which a blade contact pressure correction device is divided and installed in the roll longitudinal direction.
[Patent Document 1]
JP-A-8-267022 [Patent Document 2]
JP 2000-218311 A [Patent Document 3]
Japanese Patent Laid-Open No. 2000-8292
[Problems to be solved by the invention]
However, when the structure disclosed in Patent Document 1 is used under a high-temperature atmosphere, there is no sufficient study on durability, heat resistance, maintainability, and it is difficult to ensure stable use over a long period of time. There was a problem.
[0005]
Moreover, in order to prevent the steel strip in the normal plate from moving from side to side in the running direction, the normal transport roll is often formed with a so-called roll crown in which the body of the roll is convex in advance. When a steel strip having a high temperature is run on such a roll, the roll crown is further amplified by receiving the heat of the steel strip (the amplified roll crown is called a heat crown). According to the structure disclosed in Patent Document 2, it is possible to use at a high temperature by the cooling means, but since it cannot cope with the heat crown, the blade can contact the roll surface evenly. As a result, there was also a problem that the removal of foreign matters was insufficient.
[0006]
Furthermore, in the structure disclosed in Patent Document 3, although it corresponds to the roll crown, it is necessary to use an elastic material such as a synthetic rubber as a means for adjusting the contact pressure of the blade. There was also a problem that it could not be used under a high temperature atmosphere (230 ° C. for fluoro rubber (FKM), which is said to have the highest heat resistance).
[0007]
Then, this invention makes it a subject to provide the foreign material removal apparatus of the roll surface which can be used in a high temperature atmosphere and can respond also to the heat crown which generate | occur | produces in a roll.
[0008]
[Means for Solving the Problems]
The present invention will be described below. In order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are appended in parentheses, but the present invention is not limited to the illustrated embodiment.
[0009]
The invention of claim 1 is an apparatus for removing foreign matter from the surface of a roll (200) used under a high temperature atmosphere, a heat-resistant blade (10) whose tip can contact the surface of the roll, and the blade A plurality of blade holders (20a, 20b, 20c) to be held, and each blade holder is capable of adjusting the contact pressure of the blade to the roll surface at a temperature of 250 ° C. or higher. The problem is solved by the foreign matter removing device (1) on the roll surface provided with the contact pressure adjusting means (100).
[0010]
According to the present invention, the blade holder is divided into a plurality of parts, and each blade holder is provided with a contact pressure adjusting means. Therefore, the contact pressure is changed in the roll longitudinal direction and is optimal for removing foreign matter on the roll surface. It is possible to make contact between the roll and the blade under various conditions. That is, even if there is a roll crown or a heat crown, it is possible to remove foreign matter on the roll surface while sufficiently following the blade to the roll profile. In addition, since the contact pressure adjusting means can adjust the contact pressure at a temperature of 250 ° C. or higher, an appropriate contact pressure can be applied in the roll length direction even in a high temperature atmosphere in a transfer device in the furnace. It is possible to remove foreign substances adhering to the roll surface while holding.
[0011]
The invention of claim 2 is that in the roll surface foreign matter removing device (1) according to claim 1, adjacent blade holders (20a, 20b; 20b, 20c) are connected with a predetermined degree of freedom. Features.
[0012]
According to the present invention, since adjacent blade holders are connected to each other, it becomes easy to prevent damage to the blades without causing a difference in the amount of reduction between the blade holders. Further, since a predetermined degree of freedom is given to the connection, it is ensured that a constant contact pressure difference is given between the blade holders.
[0013]
According to a third aspect of the present invention, in the roll surface foreign matter removing apparatus (1) according to the first or second aspect, the heat-resistant contact pressure adjusting means (100) is provided for each blade holder (20a, 20b; 20b, 20c). And a plurality of rotating bodies (120, 110, 130) provided on the lever and levers (122, 112a, 112b, 132) attached to the respective rotating bodies. The plurality of rotating bodies are formed in a columnar shape or a cylindrical shape. And combined with each other in a telescopic manner.
[0014]
Here, “combined in a telescope shape” means a state in which another rotating body (column or cylindrical shape) is coaxially inserted into one rotating body (cylindrical shape). Therefore, basically, with respect to one rotating body, the other rotating bodies can slide in the common axial direction and the circumferential direction.
[0015]
According to the present invention, the innermost peripheral rotary body is attached to the central blade holder, and the central outer rotary body is attached to the blade holders on both sides of the central blade holder. By attaching an outer rotating body to the blade holders on both sides and attaching a lever to the end side of each rotating body, it becomes possible to adjust the contact pressure of the blade for each blade holder divided by lever operation. .
[0016]
According to a fourth aspect of the present invention, in the foreign matter removing device (1) for a roll surface according to the third aspect, the levers (122, 112a, 112b, 132) are detachably attached to the rotating body (120, 110, 130). It is characterized by.
[0017]
According to the present invention, when it is not necessary, the lever can be removed and placed, so that it becomes easy to effectively use the space around the apparatus.
[0018]
A fifth aspect of the present invention provides the roll surface foreign matter removing apparatus (1) according to any one of the first to fourth aspects, wherein the heat-resistant blade (10) restricts contact of the roll surface with the stopper (50). Is provided.
[0019]
According to the present invention, when it is not necessary to remove foreign matter, the life of the heat-resistant blade can be extended by restricting the blade from contacting the roll surface with the stopper.
[0020]
Such an operation and gain of the present invention will be clarified from the embodiments described below.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
<First embodiment>
FIG. 1 is a schematic view showing a roll surface foreign matter removing apparatus according to a first embodiment of the present invention. This roll surface foreign matter removing device 1 is a foreign matter removing device for a roll in a continuous annealing furnace, and is divided into three in the length direction of one heat resistant blade 10 that can be brought into contact with the roll surface. Blade holders 20a, 20b, and 20c that hold the heat-resistant blade 10, and a contact pressure adjusting mechanism 100 that adjusts the contact pressure to the roll for each of the divided blade holders.
[0022]
The contact pressure adjusting mechanism 100 includes a cylindrical first rotating body 110 whose both ends are rotatably attached to the bearings 101a and 101b, and a telescope-shaped first rotating body provided on both sides of the first rotating body 110 as an outer cylinder. A two-rotor 120 and a third rotor 130 are provided. Hereinafter, the shaft core shared by these rotating bodies is referred to as “shaft core X”. The bearings 101a and 101b are attached to the furnace walls 40a and 40b of the continuous annealing furnace by flanges 102a and 102b with the axis X as a reference.
[0023]
The length of the second rotating body 120 and the third rotating body 130 in the axis X direction is a little less than one-third that of the first rotating body 110. That is, when the first rotating body 110 is divided into three parts by dividing the length in the axial center X direction into three parts by excluding the bearing parts at both ends, the first part located on the left side of the drawing is the second part. The part inserted into the rotating body 120, the second part at the center is the part where the first rotating body 110 itself is exposed, and the third part located on the right side of the figure is inserted into the third rotating body 130. It is configured as a part.
[0024]
Levers 112a and 112b are respectively attached to the ends of bearings 101a and 101b provided on both sides of the first rotating body 110 in a direction orthogonal to the axis X in plan view. The levers 122 and 132 are attached to the left end side of the second rotating body 120 and the right end side of the third rotating body 130, respectively.
[0025]
Each of the blade holders 20a, 20b, and 20c is formed to have a length that equally divides the length of the heat-resistant blade 10 in the length direction (roll length direction / direction parallel to the axis X). A gap having a predetermined width is provided between the blade holders. The blade holder 20a is fixed to the second rotating body 120 by a joining means such as welding or a mechanical coupling means such as bolting. Similarly, the blade holder 20b is fixed to the first rotating body 110, and the blade holder 20c is fixed to the third rotating body 130, respectively.
[0026]
Further, reinforcing ribs 21a, 22a; 21b, 22b; 21c, 22c are provided at both ends of each blade holder. The reinforcing ribs 21a and 22a are joined to the second rotating body 120 on one end side and to the blade holder 20a on the lower surface side by welding. The reinforcing ribs 21b and 22b are joined at one end to the first rotating body 110 and at the lower surface to the blade holder 20b. Further, the reinforcing ribs 21c and 22c are joined to the third rotating body 130 on one end side and to the blade holder 20c on the lower surface side (see FIG. 2).
[0027]
The blade holders 20a and 20b are connected to each other by connecting the reinforcing ribs 22a and 21b by fastening means such as bolts. Similarly, the blade holders 20b and 20c are connected to each other by the coupling of the reinforcing ribs 22b and 21c. These will be described later with reference to FIG.
[0028]
FIG. 2 is a diagram showing a roll 200 and a schematic cross section taken along line II-II in FIG. 1 representing the roll surface foreign matter removing apparatus 1. As shown in the drawing, one end of the blade holder 20b is bonded and fixed to the first rotating body 110. Moreover, the upper surface side is joined to the lower surface side of the reinforcing rib 21b. One end of the reinforcing rib 21b is fixed to the first rotating body 110. The blade holder 20b is provided with a slit 23 along the thickness direction from the end surface opposite to the joint with the first rotating body 110 toward the first rotating body 110. The width (thickness) of the slit 23 is slightly larger than the thickness of the heat-resistant blade 10. The heat-resistant blade 10 is inserted into the slit 23 and fixed to the blade holder 20b by fastening means including a bolt 24, a nut 25, and washers 26a and 26b. A bolt 27 is attached to the reinforcing rib 21b. The bolt 27 is provided to connect the blade holder 20b and the blade holder 20a by connecting the reinforcing rib 21b of the blade holder 20b and the reinforcing rib 22a of the blade holder 20a. Details will be described later.
[0029]
The above configuration relates to the structure between the blade holder 20b, the reinforcing rib 21b, and the first rotating body 110 arranged on the line II-II in FIG. The blade holders 20a, 20b, and 20c attached to 120 and 130 are applied between the reinforcing ribs 22a, 22b, and 21c. A similar structure is also applied to the blade holders 20a and 20c attached to the rotating bodies 120 and 130 and their reinforcing ribs 21a and 22c except for a structure for connecting the two blades. The heat-resistant blade 10 can be formed of a heat-resistant alloy (for example, stainless steel), heat-resistant ceramics, or the like.
[0030]
FIG. 3 is an enlarged view of the portion III in FIG. 1 and shows a connection structure between blade holders. FIG. 3 shows the connection between the blade holder 20b attached to the first rotating body 110 and the blade holder 20c attached to the third rotating body 130. This connection is realized by connecting the reinforcing rib 22b of the blade holder 20b and the reinforcing rib 21c of the blade holder 20c by a bolt 27, a nut 28, and an elastic washer 29.
[0031]
The insertion holes 40a and 40b of the bolts 27 provided in the reinforcing ribs 22b and 21c are formed by a predetermined amount larger than the diameter of the bolt thread forming portion (in this embodiment, 2 mm to 3 mm). Therefore, the blade holders 20b and 20c are connected with a play of this size, and the strength for tightening the nut 28 is set so as to allow the play.
[0032]
A similar structure is also applied between the reinforcing rib 22a of the blade holder 20a and the reinforcing rib 21b of the blade holder 20b.
[0033]
FIG. 4 is a schematic view showing a telescope structure of a rotating body. In this figure, the second rotating body 120 and the first rotating body 110 fitted coaxially with respect to the second rotating body 120 are shown, and the second rotating body is shown to show the internal structure. A portion of 120 is shown cut away. The outer diameter of the 1st rotary body 110 is formed smaller than the internal diameter of the 2nd rotary body 120, and the gland packing 121 is arrange | positioned between both. The gland packing 121 is formed in a ring shape using a heat-resistant solid lubricant, for example, graphite. In this embodiment, seven gland packings 121, 121, 121,... Are arranged between the right end of the inner peripheral surface of the second rotating body 120 and the outer peripheral surface of the first rotating body 110. In order to fix the position of the gland packing 121, ribs 122 a and 122 b are formed on both ends of the inner surface of the second rotating body 120 where the gland packing 121 is arranged.
[0034]
The structure between the 3rd rotary body 130 and the 1st rotary body 110 inserted coaxially by the 3rd rotary body 130 is also comprised similarly. By configuring the structure between the rotating bodies in this way, the two rotating bodies rotating around the common axis X can be individually rotated independently.
[0035]
FIG. 5 is a schematic cross-sectional view showing a structure in which the lever 112b is detachably attached to the rotating body 110. As shown in FIG. A seat 60 formed so as to be in close contact with the outer peripheral shape of the rotating body 110 is joined by a method such as welding. Two holes 63 and 64 are formed so as to penetrate from the seat 60 to the rotating body 110. The two holes 63 and 64 are internally threaded at the lower inner peripheral surface. The lever 112 b is also provided with holes 65 and 66 at positions corresponding to the holes 63 and 64. The bolt 61 is inserted into the holes 65 and 63 and rotated to be screwed into the female screw of the hole 63, and the lever 112b is fixed at one point. Similarly, the bolt 62 is inserted into the holes 66 and 64 and rotated to be screwed into the female screw of the hole 64, whereby the lever 112 b is fixed to the rotating body 110 at two points. In order to remove the lever 112b from the rotating body 110, the bolts 61 and 62 may be rotated to release the threaded engagement with the female threads of the holes 63 and 64 and to remove the lever 112b.
[0036]
FIG. 6 is a schematic diagram showing the function of the stopper. A shaft 52 is attached to the in-furnace fixing portion 55. A flange member 51 is attached to the shaft 52 so as to be rotatable around the shaft 52. The eaves member 52 is configured so that it can be fixed at the positions shown in FIGS. The shaft 52 and the flange member 51 are configured as a stopper 50 of the roll surface foreign matter removing apparatus 1.
[0037]
On the other hand, the roll surface foreign matter removing apparatus 1 can be continuously rotated around the axis X from the position (A) in the figure to the positions shown in (B) and (C) as described above. It is possible. The position shown in (C) is a position when the foreign matter adhering to the surface of the roll 200 is removed.
[0038]
When the heat resistant blade 10 of the roll surface foreign matter removing apparatus 1 is not desired to come into contact with the surface of the roll 200, the roll surface foreign matter removing apparatus 1 is returned from the position (C) to the position (B), while the stopper 50 The collar member 51 is rotated from the position (E) to the position (D). As a result, the heat-resistant blade 10 of the roll surface foreign matter removing apparatus 1 is locked to the tip 53 of the flange member 51, and the rotation of the roll surface foreign matter removing apparatus 1 from the position (B) to the position (C) is restricted. The blade 10 can be prevented from contacting the roll 200. The flange member 51 of the stopper 50 may be disposed in the position (D) in advance, and the roll surface foreign matter removing apparatus 1 may be moved from the position (A) to the position (B).
[0039]
Next, operation | movement of the roll surface foreign material removal apparatus 1 comprised as mentioned above is demonstrated with reference to FIG. When the levers 112a and 112b attached to both ends of the first rotating body 110 are pushed down, the first rotating body 110 receives a force that rotates around the axis X in the direction in which the lever is pushed down. The rotating force transmitted to the first rotating body 110 is also transmitted to the central blade holder 20b attached to the first rotating body 110. The rotating force transmitted to the blade holder 20b is transmitted to the central portion of the heat-resistant blade 10.
[0040]
Similarly, when the lever 122 attached to the left end of the second rotating body 120 is pushed down, the second rotating body 120 is subjected to a force that rotates around the axis X in the direction in which the lever is pushed down. The rotating force transmitted to the second rotating body 120 is also transmitted to the left blade holder 20a attached to the second rotating body 120. The rotating force transmitted to the blade holder 20a is transmitted to the left side portion of the heat-resistant blade 10.
[0041]
Similarly, when the lever 132 attached to the right end of the third rotating body 130 is pushed down, the third rotating body 130 receives a force that rotates around the axis X in the direction in which the lever is pushed down. The rotating force transmitted to the third rotating body 130 is also transmitted to the right blade holder 20c attached to the third rotating body 130. The rotating force transmitted to the blade holder 20 c is transmitted to the right side portion of the heat-resistant blade 10.
[0042]
In the above description, it is assumed that the operation of the lever is based on human power, but it is needless to say that the lever may be operated using hydraulic pressure, pneumatic pressure, or mechanical structure.
[0043]
By pushing down each lever as described above, the force is transmitted to the left side, the center, and the right side of the blade 10 in the direction in which the lever is pushed down through each rotating body and each blade holder. Therefore, since the optimum reduction can be applied in the length direction of the blade along the roll profile (crown shape), it is possible to cleanly remove the foreign matter adhering to the roll surface even when there is a roll crown. In addition, it is not necessary to use an elastic body such as rubber as a means for adjusting the reduction, and since it can be composed entirely of metal or the like, a heat resistant structure is easy.
[0044]
Further, since the blade holders 20a and 20b and the blade holders 20b and 20c are connected with appropriate play, there is no significant difference in the force applied to the blade 10, so that the blade 10 is prevented from being damaged. The
[0045]
Furthermore, since the heat resistant blade 10 can be brought into contact with the surface of the roll 200 only when necessary by the stopper 50, the life of the heat resistant blade 10 can be extended.
[0046]
<Second embodiment>
FIG. 7 is a schematic view showing the roll surface foreign matter removing apparatus 2 according to the second embodiment of the present invention. In the roll surface foreign matter removing apparatus 2, the heat-resistant blade 300 is held by blade holders 310 to 350 divided into five sheets. The blade holders 340, 320; 320, 310; 310, 330; 330, 350 adjacent to each other are connected to each other. The rotating bodies 210 to 250 fixed to the blade holders have a triple structure according to the telescope structure of the present embodiment corresponding to the blade holder being divided into five parts. The innermost rotator 210 is coaxially inserted into the intermediate rotators 220 and 230. The rotating bodies 220 and 230 are coaxially fitted to the outermost rotating bodies 240 and 250, respectively. The blade holders 310 to 350 are fixed to the rotating bodies 210 to 250, respectively. Lever 311 a, 311 b, 321, 341, 351, 331 are attached to both ends of the rotating body 210, the left end side of the rotating bodies 240, 220, and the right end side of the rotating bodies 230, 250, respectively. Both ends of the rotating body 210 are rotatably attached to bearings 201a and 201b attached to the furnace walls 204a and 204b via flanges.
[0047]
That is, in the roll surface foreign matter removing apparatus 2 according to the second embodiment, the roll surface foreign matter removing apparatus 1 according to the first embodiment is divided into three parts in the roll length direction to adjust the reduction of the blade to the roll surface. This is to divide the current one into five subdivided parts to adjust the reduction. Although the apparatus has a complicated structure, by subdividing in this way, it becomes possible to form a more precise distribution of the rolling force in the length direction of the roll.
[0048]
While the present invention has been described in connection with embodiments that are presently the most practical and preferred, the present invention is not limited to the embodiments disclosed herein. However, the present invention can be changed as appropriate without departing from the scope or spirit of the invention that can be read from the claims and the entire specification, and a roll surface foreign matter removing apparatus with such a change is also included in the technical scope of the present invention. Must be understood. The modifications shown below should be construed as being included in the technical scope of the present invention.
[0049]
<Modification>
In the above, although it demonstrated as a roll surface foreign material removal apparatus of a continuous annealing equipment, this invention is not limited to this, It can be used as a foreign material removal apparatus of the roll widely used in a high temperature atmosphere. . For example, it can be applied to a roll in a high-temperature atmosphere in equipment used for firing, sintering, heating, and heat treatment of metals and ceramics.
[0050]
【The invention's effect】
As described above, according to the invention of claim 1, the blade holder is divided into a plurality of parts, and the contact pressure adjusting means is provided in each blade holder, so that the contact pressure is changed in the roll longitudinal direction. Thus, the contact between the roll and the blade can be achieved under the optimum conditions for removing foreign matter on the roll surface. That is, even if there is a roll crown or a heat crown, it is possible to remove foreign matter on the roll surface while sufficiently following the blade to the roll profile. In addition, since the contact pressure adjusting means can adjust the contact pressure at a temperature of 250 ° C. or higher, an appropriate contact pressure can be applied in the roll length direction even in a high temperature atmosphere in a transfer device in the furnace. It is possible to remove foreign substances adhering to the roll surface while holding.
[0051]
According to the second aspect of the present invention, since adjacent blade holders are connected to each other, it becomes easy to prevent damage to the blades without causing a difference in the amount of reduction between the blade holders. In addition, since a predetermined degree of freedom is given to the connection, it is guaranteed that a constant contact pressure difference is given between the blade holders.
[0052]
According to the invention of claim 3, when the innermost peripheral rotating body is attached to the central blade holder, the central outer rotating body is attached to the blade holders on both sides thereof, and the blade holder has a large number of divisions. Furthermore, by attaching an outer rotating body to the blade holders on both sides of the blade holder and attaching a lever to the end side of each rotating body, the contact pressure of the blade can be adjusted for each blade holder divided by lever operation. It becomes possible.
[0053]
According to the invention of claim 4, since the lever can be removed when it is not necessary, it becomes easy to effectively utilize the space around the apparatus.
[0054]
According to the invention of claim 5, when it is not necessary to remove foreign matters, the blade is prevented from coming into contact with the roll surface by the stopper, so that the life of the heat-resistant blade can be extended.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a roll surface foreign matter removing apparatus according to a first embodiment of the present invention.
2 is a schematic cross-sectional view taken along line II-II in FIG. 1 showing a roll surface foreign matter removing apparatus and a roll.
3 is an enlarged view of a portion III in FIG. 1, showing a connection structure between blade holders.
FIG. 4 is a schematic view showing a telescope structure of a rotating body.
FIG. 5 is a schematic cross-sectional view showing a structure in which a lever is detachably attached to a rotating body.
FIG. 6 is a schematic diagram showing the function of a stopper.
FIG. 7 is a schematic view showing a roll surface foreign matter removing apparatus according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Roll surface foreign material removal apparatus 10 Heat resistant blade 20a, 20b, 20c Blade holder 50 Stopper 100 Heat resistant contact pressure adjustment means 110, 120, 130 Rotating body 112a, 112b; 122, 132 Lever 200 Roll

Claims (3)

An apparatus for removing foreign matter from a roll surface used under a high temperature atmosphere, comprising: a heat-resistant blade whose tip can contact the roll surface; and a blade holder divided into a plurality of parts for holding the blade. Equipped,
Each blade holder is provided with heat-resistant contact pressure adjusting means capable of adjusting the contact pressure of the blade to the roll surface under a temperature of 250 ° C. or higher ,
The adjacent blade holders are connected with a predetermined degree of freedom,
The heat-resistant contact pressure adjusting means includes a plurality of rotating bodies provided for each of the blade holders and a lever attached to each of the rotating bodies, and the plurality of rotating bodies are formed in a columnar shape or a cylindrical shape. And removes foreign matter from the roll surface that is telescopically combined with each other . The foreign matter removing device for a roll surface according to claim 1 , wherein the lever is detachably attached to the rotating body. The heat resistance of the blade foreign matter removing apparatus of the roll surface according to claim 1 or 2 stopper is provided for regulating the contact of the said roll surface.

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