TW202406645A - Plate for sliding nozzle device, and manufacturing method and manufacturing device for manufacturing same - Google Patents

Abstract

The present invention provides: a plate for a sliding nozzle device with which it is possible to inhibit fracturing or destruction of a plate body, and apply a greater restraining force on the plate body than in a conventional multiple hoop method; and a manufacturing method and a manufacturing device for manufacturing the same. In this plate for a sliding nozzle device, in which a hoop obtained by winding a strip-shaped thin iron sheet B in a plurality of layers is installed on the outer peripheral side surface of a plate body A1 made of a refractory, the maximum compressive strain of the inner peripheral surface of an inner hole in the plate body A1, obtained by a method for using a strain gauge to measure the strain released when the hoop is cut, is 200-1500 [mu][epsilon] inclusive. This plate can be obtained using a manufacturing device provided with a tightening mechanism 3 that includes a pressing jig 31 for holding the strip-shaped thin iron sheet B while being displaced along the outer peripheral side surface of the plate body A1, so that the strip-shaped thin iron sheet B follows the outer peripheral side surface of the plate body A1 at the portion at which the strip-shaped thin iron sheet B comes into contact with the outer peripheral side surface of the plate body A1.

Description

Plate for sliding mouth device, manufacturing method and manufacturing device thereof

The present invention relates to a plate for a sliding nozzle device used to control the flow of molten steel discharged from a container such as a ladle or a feeding trough used in a casting device, a method of manufacturing the same, and a manufacturing device. In addition, the plate for the sliding nozzle device in the present invention is a plate-shaped part that includes a plate main body made of refractory material and a hoop, etc., and becomes an integrated structure when installed in the sliding nozzle device.

In order to suppress cracks during use, prevent collapse during recycling, etc., the plate main body, which is the main body of the plate made of refractory materials, is usually provided with a strip-shaped metal plate on the outer peripheral side. A strip of metal plate is used to restrain the main body of the plate. The strip-shaped metal plate provided on the outer peripheral side of the plate body is mainly divided into multiple hoop methods and shrink fit methods (also called hot band methods). In the multi-hoop method, a thin strip-shaped metal plate (hereinafter referred to as "strip-shaped thin iron plate", mostly about 0.4~0.6mm thick) is wound into multiple layers to form a multi-layer structure. The shrink fit method is to heat a metal plate that is shaped into a loop shape according to the shape of the outer peripheral side surface of the plate body and is thicker than the above-mentioned strip-shaped thin iron plate (mostly about 3 mm thick or more), so that the metal plate After expansion, it is embedded in the main body of the board.

However, the conventional multiple hoop method has the following problems (1) to (3): (1) the binding force on the board body is weaker (about 1/2) than the shrink fit method, (2) the torsion of the board body is suppressed. The effect of cracking/destruction is small. (3) When the board is reused many times, the hoop will detach and the main body of the board will collapse. As a countermeasure, for example, Patent Document 1 proposes "a plate for a sliding nozzle in which a groove is provided on a part of the circumferential side surface of the plate (equivalent to the plate body), and a steel strip (equivalent to a strip-shaped thin iron plate) is The front end bending part fits into the groove part, and the remaining part of the steel strip is tightly wound and fixed around the circumferential side surface of the plate." Patent Document 1 is intended to solve the problem that when a steel strip (strip-shaped thin iron plate) is stretched and wound around a plate body, at least the first layer of the steel strip (strip-shaped thin iron plate) Loose hoops and poor fastening caused by insufficient fixing force of the main body of the board. However, even with his proposed method, the binding force on the plate body has not yet reached a sufficient level, and the above-mentioned problems of the multiple hoop method still cannot be solved. Therefore, shrink fitting is mostly used these days.

However, as shown in Patent Document 2 in addition to the above-mentioned Patent Document 1, the shape of the outer peripheral side surface of the plate main body is not all of the outer peripheral side surfaces of a perfect circle or a substantially perfect circle, but has a curved portion, a straight line or a substantially straight line portion, or It is oval in shape. This shape is not a perfect circle or approximately a perfect circle. Although the plate main body can be tightened and restrained by a strip-shaped metal plate, uniform tightening force or restraining force cannot be obtained around the bend. The curved part has stronger binding force. The strip metal plate with a thickness of about 3mm or more used in the shrink fit method, especially because of its small deformation ability, is prone to local stress on the main body of the plate, which can cause cracks and damage to the main body of the plate. In the shrink fit method, even if the strip-shaped metal plate is made to fit the outer circumferential side shape of the plate main body and become a ring shape, the deformation caused by the thermal expansion and contraction of the strip-shaped metal plate cannot follow the outer circumferential side shape of the plate main body, which has a negative impact on the plate main body. The binding force cannot be uniform. When the shape of the outer peripheral side of the plate main body has a curved portion, especially near the curved portion of the plate main body, the degree of closeness and restraint of each part is different, and it is impossible to restrain the entire outer peripheral side of the plate main body with a uniform force, and for Temperature changes during shrink fitting or use during operation cause different parts of the strip metal plate to behave differently (specifically, the degree of expansion and contraction), so uneven stress is easily generated inside the main body of the plate made of refractory materials. Cause cracks and damage to the main body of the board. Furthermore, the shrink fit method also has the following problem, that is, it is difficult to produce the ring-shaped metal plate to match the shape of the outer peripheral side of each plate body and to install the ring-shaped metal plate on the plate body. Fine-tuning requires low precision and is difficult to automate. In order to achieve automation, large-scale equipment must be used, which increases the cost of materials, installation work fees, etc. [Prior technical literature] [Patent Document]

[Patent Document 1] Microfilm of Japanese Publication No. Sho 59-173615 (Japanese Publication No. Sho 61-87652) [Patent document 2] Japanese Patent Publication No. 58-48835

[The problem that the invention aims to solve]

In view of the above circumstances, the problem to be solved by the present invention is to provide a plate for a sliding mouth device, which can suppress cracks and damage of the plate body and can restrain the plate body better than the conventional multiple hoop method. It is stronger and provides a manufacturing method and manufacturing device for the plate used in the sliding mouth device. [Technical means to solve problems]

In order to solve the above-mentioned problems, the inventors of the present invention observed in detail the occurrence of cracks and damage in various plate main bodies during actual operations, and analyzed the causes. As a result, it was found that in order to suppress cracks and damage to the plate body during actual operations, it is important to improve the uniformity of the binding force of the strip-shaped metal plate installed on the outer peripheral side of the plate body to the plate body. Therefore, the inventors of the present invention adopted a multi-hoop method instead of a shrink fit method as a method of installing the strip-shaped metal plate on the outer peripheral side of the plate body. On the other hand, it has been pointed out that in the multi-hoop method, the binding force on the panel body is weaker than in the shrink fit method, and the effect of suppressing cracking/destruction of the panel body is small. Therefore, the inventors of the present case also conducted a detailed analysis of the relationship between the occurrence of cracks and damage of various plate main bodies in actual operations and the binding force on the plate main body. As a result, it was found that in order to suppress cracks and damage of the plate body during actual operation of the multiple hoop method, it is only necessary to set the maximum compressive strain of the inner circumferential surface of the inner hole of the plate body in relation to the magnitude of the binding force on the plate body. It suffices within a larger specific range than the multiple hoop method. Specifically, in order to keep the maximum compressive strain of the inner circumferential surface of the inner hole in the plate body within a specific range, it is also considered to use a pressing jig to press the strip-shaped thin iron plate along the outer circumferential side of the plate body. The method and device for pressing thin iron plates are thus achieved to achieve the completion of the present invention.

That is, one aspect of the present invention is to provide the following plate for a sliding mouth device. A plate for a sliding nozzle device. A hoop formed by winding a strip-shaped thin iron plate in multiple layers is provided on the outer circumferential side of a plate main body made of refractory materials. When the hoop is cut off, the test results are measured using a strain gauge. The method of releasing the strain, the maximum compressive strain of the inner circumferential surface of the inner hole of the aforementioned plate body is 200με~1500με.

According to another aspect of the present invention, the following method of manufacturing a plate for a sliding mouth device is provided. A method of manufacturing a plate for a sliding nozzle device in which a hoop formed by winding a strip-shaped thin iron plate in multiple layers is provided on the outer peripheral side of a plate main body made of refractory material. , the manufacturing method includes: applying a tensile force to the outer peripheral side of the plate body while heating the strip-shaped thin iron plate, and performing a winding step of sealing, and the winding step includes: so that the strip-shaped thin iron plate is The process of pressing the strip-shaped thin iron plate with a pressing jig that is displaced along the outer circumferential side of the plate body so that the portion that comes into contact with the outer circumferential side of the plate main body is along the outer circumferential side of the plate main body. .

According to another aspect of the present invention, the following device for manufacturing a plate for a sliding mouth device is provided. A device for manufacturing a plate for a sliding nozzle device, which is a device for manufacturing a plate for a sliding nozzle device in which a hoop formed by winding a strip-shaped thin iron plate in multiple layers is provided on the outer peripheral side of a plate main body made of refractory material , this manufacturing device is equipped with: a winding mechanism for applying a tensile force to the outer peripheral side of the plate body while heating the strip-shaped thin iron plate, and the winding mechanism includes a pressing jig, and the pressing jig The tool is such that the portion of the strip-shaped thin iron plate that starts to contact the outer peripheral side of the plate body is along the outer peripheral side of the plate body, and the strip-shaped thin iron plate is displaced along the outer peripheral side of the plate body. Thin iron plates are pressed tightly. [Effects of the invention]

According to the present invention, in the plate for the sliding mouth device, cracks and damage of the plate main body can be suppressed. It can also make the binding force on the main body of the board stronger than the previous multiple hoop methods.

First, a plate manufacturing device for the sliding nozzle device of the present invention (hereinafter referred to as "plate manufacturing device") will be described. FIG. 1 shows a structural example of a panel manufacturing apparatus, with the upper half being a top view and the lower half being a front view.

The plate manufacturing apparatus shown in FIG. 1 includes a plate holding mechanism 1, an iron plate holding mechanism 2, and a winding mechanism 3. The plate holding mechanism 1 is used to hold the main body of the plate (hereinafter referred to as the "plate") for the sliding nozzle device, that is, the plate main body A1; the iron plate holding mechanism 2 is used to hold the strip-shaped thin iron plate B, which is The iron plate B is wound around the outer circumferential side of the plate main body A1 in multiple layers to form a hoop; the winding mechanism 3 is attached to the outer circumferential side of the plate main body, and applies tensile force to the strip-shaped thin iron plate B while heating it. seal up.

The plate holding mechanism 1 includes a mounting base 11 on which the plate body A1 is mounted, and a motor 12 that rotates the mounting base 11 in a horizontal plane. Specifically, the motor 12 rotates the rotating shaft 111 extending vertically downward from the lower surface of the mounting table 11 around its axis, thereby rotating the mounting table 11 in a horizontal plane. In this embodiment, the rotation speed of the motor 12 can be controlled by an inverter, and the number of rotations can also be controlled.

As shown in the upper half of FIG. 1 , fixing jigs 13 are assembled at a plurality of locations (10 locations in this embodiment) of the mounting base 11 . The fixing jigs 13 are used to fix the plate main body A1 to the mounting base 11 . Fixing means for setting the table 11. The fixing jigs 13 are assembled to be able to move forward and backward relative to the outer peripheral side of the plate main body A1. When the plate main body A1 is to be fixed on the mounting table 11, the front ends of the fixing jigs 13 are advanced to be in contact with the outer peripheral side of the plate main body A1. The abutting position is clamped at this position. In this embodiment, in order to prevent the front ends of the fixed jigs 13 from causing obstruction when winding the strip-shaped thin iron plate B around the outer peripheral side of the plate body A1, the front ends of the fixed jigs 13 are made to abut against The lower end side of the outer peripheral side surface of the plate main body A1 (for example, a position several mm higher than the lower end surface of the plate main body A1). Furthermore, the fixing means for fixing the plate main body A1 to the mounting table 11 is not limited to the fixing jig 13 as in this embodiment, and may be based on the adsorption force of magnets or vacuum. A fixing jig is installed in the inner hole A1a of the plate main body A1 for fixing.

The iron plate holding mechanism 2 includes a holding base 21 and a bearing part 22 . The holding base 21 holds a strip-shaped thin iron plate B wound in a roll shape, and the bearing portion 22 supports a rotation shaft 211 extending vertically downward from the lower surface of the holding base 21 so as to be rotatable about its axis. The roll-shaped strip-shaped thin iron plate B held by the holding table 21 is sent out by the rotation of the holding table 21 in the horizontal plane. In fact, when the strip-shaped thin iron plate B is wound around the outer peripheral side of the plate body A1, the strip-shaped thin iron plate B is stretched, thereby rotating the holding table 21, and with this rotation, the strip-shaped thin iron plate B is stretched. Send. In this embodiment, the bearing portion 22 includes an air brake 221 as a braking mechanism. The air brake 221 causes a braking force corresponding to the air pressure to act on the rotating shaft 211 . As a result, braking force acts on the rotation of the holding base 21 . In this embodiment, a tensile force is applied to the strip-shaped thin iron plate B by this braking force. Moreover, the strength of the braking force can be adjusted by the air pressure of the air brake 221, thereby changing the tensile force applied to the strip-shaped thin iron plate B. Although not shown in the figure, the iron plate holding mechanism 2 may include means for adjusting the vertical position (height) of the strip-shaped thin iron plate B sent out from the holding table 21 .

The rolling sealing mechanism 3 includes a pressing fixture 31 . As will be described in detail later, the pressing jig 31 presses the strip-shaped thin iron plate B along the outer circumferential side of the plate body A1 at the portion where the strip-shaped thin iron plate B begins to contact the outer circumferential side of the plate body A1. BPress tightly. In this embodiment, the pressing jig 31 is installed so that its middle part can rotate around the pin 311. Furthermore, the base end of the fixture 31 is pressed and connected to the cylinder rod 312a of the cylinder 312. That is, by advancing and retreating the cylinder rod 312a of the air cylinder 312, the pressing jig 31 is rotated around the pin 311. Thereby, the pressing part 31a at the front end of the pressing jig 31 can be displaced along the outer peripheral side surface of the board main body A1. In this embodiment, the pressing portion 31a is composed of a roller that rolls along the outer peripheral side surface of the plate body A1.

In this embodiment, the crimping mechanism 3 further includes two pressing jigs 32A and 32B. The details will be described later. Each of the two pressing jigs 32A and 32B is used to wind the strip-shaped thin iron plate B around the outer peripheral side of the main body A1 near the starting end of the strip-shaped thin iron plate B. It is pressed and fixed to the outer peripheral side of the board body A1. The two pressing jigs 32A and 32B can each be moved to a fixed position and a retreat position. In the fixed position, the strip-shaped thin iron plate B is pressed and fixed on the outer circumferential side of the plate body A1 near the starting end of the strip; in the retracted position, when the second winding is wound near the starting end of the strip-shaped thin iron plate B When the second layer of strip-shaped thin iron plates is used, avoid obstructing the winding of the second layer of strip-shaped thin iron plates. In this embodiment, the two pressing jigs 32A and 32B are each movable in the horizontal direction and the vertical direction, and can be moved to the above-mentioned fixed position and the retracted position by a combination of the horizontal and vertical movements.

In this embodiment, the plate manufacturing apparatus is provided with the induction heating coil 4 as a heating means for heating the strip-shaped thin iron plate B. The induction heating coil 4 heats the strip-shaped thin iron plate B moving in the horizontal direction from the iron plate holding mechanism 2 toward the plate holding mechanism 1 by induction heating. Furthermore, the induction heating coil 4 is provided with a radiation thermometer 41 , and the radiation thermometer 41 is a thermometer for measuring the temperature of the strip-shaped thin iron plate B heated by the induction heating coil 4 . In this embodiment, the induction heating coil 4 heats the strip-shaped thin iron plate B so that the temperature measured by the radiation thermometer 41 becomes a preset target temperature. Here, the setting of the above-mentioned target temperature is changeable. By changing the setting of the target temperature, the heating temperature of the strip-shaped thin iron plate B can be changed. In addition, the heating method of the heating means for heating the strip-shaped thin iron plate B is not limited to induction heating, and may also be electric heating or gas burner heating. The thermometer method is not limited to radiation thermometers, and other non-contact thermometers such as infrared thermometers can also be used.

Next, a method of manufacturing a panel using the panel manufacturing apparatus of FIG. 1 will be described. First, as schematically shown in FIG. 2 , the rolling end of the strip-shaped thin iron plate B is fixed at a predetermined position on the outer peripheral side of the plate body A1 fixed to the mounting table 11 . In this embodiment, a recessed portion A1b is provided in a part of the outer circumferential side surface of the plate main body A1, and the starting end of the strip-shaped thin iron plate B is fixed somewhere in the recessed portion A1b.

Figure 3 shows an example of this fixing method. In this example, the initial rolling end of the strip-shaped thin iron plate B is arranged to cover the recessed portion A1b (Fig. 3(a)), and then the welding machine 5 is used from the outside of the initial rolling end of the strip-shaped thin iron plate B toward the recessed portion. Penetration welding is performed within A1b (Figure 3(b)~(c)). As a result, the melt of the strip-shaped thin iron plate B enters the recessed portion A1b and solidifies to become the fixing member A1c, thereby fixing the starting end of the strip-shaped thin iron plate B to the fixing member A1c.

Figure 4 shows another example of a method of fixing the rolled end of the strip-shaped thin iron plate B. In this example, a fixing member A1c made of iron or the like is placed in the recessed portion A1b in advance (Fig. 4(a)). Then, in the same manner as in the example of FIG. 3 , the starting end of the strip-shaped thin iron plate B is arranged to cover the recessed portion A1b ( FIG. 4(b) ), and then the welding machine 5 is used to start the rolling end of the strip-shaped thin iron plate B. The outer side of the part faces into the recessed part A1b and is penetrated and welded (Fig. 4(c)~(d)). As a result, the fixing member A1c in the recessed portion A1b and the starting winding end of the strip-shaped thin iron plate B are welded, whereby the starting winding end of the strip-shaped thin iron plate B is fixed to the fixing member A1c.

As a plate structure obtained in either of Figures 3 and 4, the plate main body A1 has a recessed portion A1b in a part of its outer peripheral side surface and a fixing member A1c in the recessed portion A1b, so that the starting rolling end of the strip-shaped thin iron plate B is fixed to the fixing member A1c. In this way, by fixing the starting end of the strip-shaped thin iron plate B to the fixing member A1c in the recessed portion A1b, when the strip-shaped thin iron plate B is wound around the outer peripheral side of the plate body A, the strip-shaped thin iron plate B can be suppressed from being rolled up. The rolling end of iron plate B is shifted in position, which helps to strengthen its binding force on plate body A. The welding machine 5 shown in FIGS. 3 and 4 is not shown in FIG. 1 . Furthermore, the method of fixing the rolling end of the strip-shaped thin iron plate B to the fixing member A1c in the recessed portion A1b is not limited to welding. Screw-in or knock-in may also be used. Such as mechanical means, or adhesion.

The shape of the recessed portion A1b here is preferably such that it includes stretching relative to the strip-shaped thin iron plate B as shown in FIG. The direction (arrow direction in FIG. 5 ) becomes the shape of the acute-angled inner wall surface A1b1.

After the initial rolling end of the strip-shaped thin iron plate B and the fixing member A1c in the recessed portion A1b are fixed, as shown schematically in Figure 2, the two pressing jigs 32A and 32B are moved to the fixed positions respectively. Thereby, the vicinity of the starting end of the strip-shaped thin iron plate B is pressed and fixed to the outer peripheral side of the plate body at two places (two pressing jigs 32A, 32B). Furthermore, in FIG. 2 , the strip-shaped thin iron plate B is fixed at two places near its starting end, but it only needs to be fixed at at least one place (at least one of the two pressing jigs 32A and 32B). In this way, by pressing and fixing the vicinity of the initial rolling end of the strip-shaped thin iron plate B to the outer peripheral side of the plate body A1 at at least one point, the positional deviation of the initial rolling end of the strip-shaped thin iron plate B can be suppressed, which is helpful. To strengthen its binding force on board body A.

After the fixation of the starting end of the strip-shaped thin iron plate B and the vicinity of the starting end is completed, the winding process is performed, that is, applying tension to the outer peripheral side of the plate body A1 while heating the strip-shaped thin iron plate B. Stretch and seal. Specifically, the plate main body A1 fixed to the mounting table 11 is rotated in a horizontal plane by driving of the motor 12, thereby winding and sealing the strip-shaped thin iron plate B on the outer peripheral side of the plate main body A1. Furthermore, this rolling process includes the following steps as schematically shown in FIG. 6: The strip-shaped thin iron plate B is tightly wound along the outer peripheral side of the plate main body A1 at the portion where it starts to contact the outer peripheral side of the plate main body A1. The pressing jig 31 tightly presses the strip-shaped thin iron plate B. In the winding process, a predetermined tensile force is applied to the strip-shaped thin iron plate B by the braking force of the air brake 221, and the strip-shaped thin iron plate B is heated to a predetermined temperature by the above-mentioned induction heating coil 4. temperature. In this way, in the winding process in this embodiment, the strip-shaped thin iron plate B is heated while applying a tensile force to the outer peripheral side of the plate body A1, and is wound, and at this time, the strip-shaped thin iron plate B is The iron plate B is pressed by the pressing jig 31 along the outer peripheral side of the plate body A1. Thereby, the binding force on the board main body A1 can be made stronger than the conventional multiple hoop method.

Here, the binding force on the plate main body A1 can be obtained by changing at least one of the heating temperature of the strip-shaped thin iron plate B, the tensile force applied to the strip-shaped thin iron plate B, and the number of layers of the strip-shaped thin iron plate B. 1 to make adjustments. Among them, the heating temperature of the strip-shaped thin iron plate B can be changed by changing the setting of the target temperature for heating by the induction heating coil 4 as described above. For example, it can be changed in the range of 200 to 800°C. The tensile force applied to the strip-shaped thin iron plate B can be changed by changing the braking force of the air brake 221 as described above, and can be changed in the range of 30 to 400 kgf (approximately 0.3 to 4 kN), for example. In addition, the number of layers of the strip-shaped thin iron plate B can be changed by changing the rotation number of the motor 12, that is, the number of windings of the strip-shaped thin iron plate B. For example, it can be changed in the range of 2 to 10 layers.

Next, the process of winding the second layer of strip-shaped thin iron plate B will be explained. As explained with reference to FIG. 2 , when winding the strip-shaped thin iron plate B of the first layer, the vicinity of the initial winding end of the strip-shaped thin iron plate B is positioned at at least one place (between the two pressing jigs 32A and 32B). At least one party) is rolled and sealed after being fixed. Then, when winding the second layer of strip-shaped thin iron plate B near the starting end of the first layer of strip-shaped thin iron plate B, as shown schematically in FIG. 7, while winding the strip-shaped thin iron plate B The second layer of strip-shaped thin iron plate B is rolled by pressing and fixing it on the outer peripheral side of the plate body A1 at at least one place (at least one of the two pressing jigs 32A and 32B) near the starting end of the roll. Specifically, as shown in Figure 7(a)~(e) sequentially, when the second layer of strip-shaped thin iron plate B is wound around the starting end of the strip-shaped thin iron plate B, by The two pressing jigs 32A and 32B are sequentially moved to the above-mentioned fixed position and the retracted position, and the strip-shaped thin iron plate B is rolled while pressing and fixing the vicinity of the initial rolling end of the strip-shaped thin iron plate B to the outer peripheral side of the plate body A1 at at least one place. The second layer of strip-shaped thin iron plate B. In addition, in FIG. 7 , only the pressing jig moved to the fixed position among the two pressing jigs 32A and 32B is shown, and the pressing jig moved to the retreat position is not shown. Therefore, the pressing jig moved to the fixed position is not shown. The pressing fixture is distinguished from the pressing fixture that moves to the retreat position.

In this way, when winding the strip-shaped thin iron plate B of the second layer near the starting end of the strip-shaped thin iron plate B of the first layer, the strip-shaped thin iron plate B of the first layer is wound while winding the strip-shaped thin iron plate B of the first layer. The strip-shaped thin iron plate B of the second layer is rolled while being pressed and fixed to the outer peripheral side of the plate body A1 at at least one place (at least one of the two pressing jigs 32A and 32B) near the end of the roll, thereby forming the first layer of the strip-shaped thin iron plate B. When the second layer of strip-shaped thin iron plate B is wound around the starting end of the first-layer strip-shaped thin iron plate B, it can suppress the loosening of the first-layer strip-shaped thin iron plate B and help strengthen it. The binding force of the board body A. Also when winding the strip-shaped thin iron plate B of the third layer near the starting end of the strip-shaped thin iron plate B of the second layer, the strip-shaped thin iron plate B of the second layer is rolled up at the same time. The strip-shaped thin iron plate B of the third layer is wound while being pressed and fixed to the outer peripheral side surface of the plate body A1 at at least one place (at least one of the two pressing jigs 32A and 32B) near the end. Thereby, when the strip-shaped thin iron plate B of the third layer is wound around the starting end of the strip-shaped thin iron plate B of the second layer, it is possible to suppress the strip-shaped thin iron plate B of the first layer and the second layer from being wound. The relaxation of iron plate B helps to strengthen its binding force on plate body A.

In this way, a hoop plate formed by winding a plurality of strip-shaped thin iron plates is provided on the outer peripheral side of the plate main body. Moreover, according to this plate, as shown in the embodiments described later, the binding force on the plate main body is stronger than the conventional multiple hoop method. More specifically, based on the method of measuring the strain released when the hoop is cut with a strain gauge, the maximum compressive strain of the inner peripheral surface of the inner hole of the plate body is 200με~1500με, thereby suppressing cracks in the plate body. ,destroy. The above-mentioned upper limit of the maximum compressive strain (1500 με) is set taking into consideration the actual performance values of the conventional hot striping method.

Here, as shown schematically in FIG. 8 , the hoop A2 in which a plurality of strip-shaped thin iron plates B are wound around the outer circumferential side of the plate body A1 may be configured to be used as illustrated in FIGS. 3 and 4 . The welding machine 5 performs penetration welding from the outside of the hoop A2 toward the recessed portion A1b, thereby providing a hole A2a penetrating from the outermost layer of the hoop A2 to the fixing member A1c, and filling the hole A2a for connecting the hoop A2 and the recessed portion A1b. The fixing member A1c is an integrated material (in the example of FIG. 8 , the melt of the strip-shaped thin iron plate B). By adopting such a structure, it is possible to suppress the occurrence of slack in the hoop A2 and contribute to strengthening the binding force of the hoop A2 to the plate main body A.

In addition, the most important technical feature of the above-mentioned manufacturing apparatus and manufacturing method is that, as shown in Figure 6, the strip-shaped thin iron plate B is pressed along the outer peripheral side of the plate body A1 by pressing the jig during winding and sealing. 31 Press the strip-shaped thin iron plate B tightly. That is, in the manufacturing apparatus and manufacturing method of the present invention, the technical features shown in FIGS. 3 to 5 , 7 and 8 can be omitted. [Example]

As an embodiment of the present invention, a plurality of multiple hoop-type boards are produced based on the above-mentioned manufacturing device and manufacturing method. As a comparative example, a plurality of multi-hoop type panels were produced based on the conventional manufacturing method disclosed in the above-mentioned Patent Document 2. Furthermore, as a reference example, a plurality of thermal stripe type boards were also produced. FIG. 9 shows the shape and size of the plate main body A1 used in the Example, Comparative Example and Reference Example. The main body A1 of the board is made of refractory material, and the elastic modulus of the refractory material is in the range of 46~53Gpa. In addition, the strip-shaped thin iron plate used in the Examples and Comparative Examples is made of rolled steel SS400 for general structural use, and its dimensions are 1 mm thick x 30 mm wide. In the multiple hoop method of the Examples and Comparative Examples, the heating temperature of the strip-shaped thin iron plate was 700°C, and the tensile force was 150kgf. The number of layers of the strip-shaped thin iron plate is 3 to 6 layers in the examples and 6 to 8 layers in the comparative examples. On the other hand, the metal plate (HB) used in the reference example of the hot strip method is also made of SS400, a general structural rolled steel, and its dimensions are 3~6mm thick x 30mm wide. In the hot strip method, the heating temperature of the metal plate (HB) is 400~600℃.

For each of the plates produced as Examples, Comparative Examples and Reference Examples, the maximum compressive strain of the inner peripheral surface of the inner hole of the plate body was measured in relation to the magnitude of the binding force on the plate body. Figure 10 schematically shows the method of measuring the maximum compressive strain. As shown in Figure 10, attach strain gauges C1 to 4 equally at four locations on the sliding surface A1d side of the inner circumferential surface of the inner hole A1a of the plate body A1, then cut off the hoop A2, and use the strain gauge C1 ~4 Measure the strain released at this time, and take the maximum value as the maximum compressive strain. Here, the type of strain gauges C1 to C4 are "foil strain gauges", and their sizes are large enough to be evenly attached to four places on the sliding surface A1d side of the inner peripheral surface of the inner hole A1a. Specifically, in this Example, Comparative Example, and Reference Example, a strain gauge with a gauge length of 5 mm and a gauge width of 1.4 mm was used.

Figure 11 shows the measurement results. In FIG. 11 , one point (plot) represents the measurement result of one plate. As can be seen from Figure 11, in the comparative example of the conventional multiple hoop method, the maximum compressive strain is less than 200 με. On the other hand, in the examples, the maximum compressive strain is 200 με to 1500 με, and it is possible to obtain the same binding force as the thermal stripe method in the reference example. In the examples, as the number of layers of the strip-shaped thin iron plates increases, the maximum compressive strain tends to increase. However, in the comparative examples, even if the number of layers of the strip-shaped thin iron plates increases, the maximum compressive strain does not necessarily increase. . The reason for this is that in the comparative example, since the compression jig was not used during crimping like the example, the first and second layers were loosened, and the binding force did not become stronger even if the number of layers was increased. As a result, the maximum compression was achieved. The strain doesn't get bigger. Furthermore, in the Reference Example, the variation in the maximum compressive strain was larger than in the Example. Here, the variation in the maximum compressive strain is due to variation in the shape and material (elastic modulus) of the plate body, variation in conditions such as heating temperature when installing the hoop, etc., and it also exists in the thermal strip method of the reference example. The size of the hoop itself varies, so the variation in maximum compressive strain becomes larger. Based on the above description, the multiple hoop method according to the present invention can improve the uniformity of the binding force on the board body compared with the hot strip method, and the binding force is stronger than the previous multiple hoop method. As a result, the sliding mouth The board used for installation can prevent cracks and damage to the main body of the board.

Next, an adjustment example for adjusting the binding force on the plate main body in the multi-hoop system of the present invention will be illustrated. The shape and size of the plate body A1 used in this adjustment example are the same as those in the previous embodiment (see Figure 9), and the elastic modulus of the refractory material is also the same as the previous embodiment and is in the range of 46~53Gpa. On the other hand, the number of layers of the strip-shaped thin iron plate is five. Furthermore, in Adjustment Example 1, the heating temperature of the strip-shaped thin iron plate was changed, and in Adjustment Example 2, the tensile force applied to the strip-shaped thin iron plate was changed, and the maximum compressive strain was measured respectively.

Figures 12 and 13 show the measurement results of the maximum compressive strain in Adjustment Example 1 and Adjustment Example 2, respectively. As can be understood from Figures 12 and 13, by changing the heating temperature of the strip-shaped thin iron plate and the tensile force applied to the strip-shaped thin iron plate, the maximum compressive strain, that is, the binding force on the plate main body, can be adjusted.

A:Board A1:Board body A1a:Inner hole A1b: concave part A1b1: The inner wall surface that forms an acute angle with respect to the stretching direction of the strip-shaped thin iron plate A1c: fixed components A1d: Sliding surface A2: hoop A2a: hole B: Strip thin iron plate C1~4: Strain gauge 1: Plate holding mechanism 11: Loading platform 111:Rotation axis 12: Motor 13: Fixed fixture (fixing means) 2: Iron plate holding mechanism 21:Keeping platform 211:Rotation axis 22:Bearing department 221: Air brake (braking mechanism) 3: Rolling and sealing mechanism 31: Press the fixture 31a: Pressing part (roller) 311:pin 312:Cylinder 312a: Cylinder rod 32A, 32B: Pressing fixture 4: Induction heating coil (heating method) 41: Radiation thermometer (thermometer) 5: Welding machine

[Fig. 1] shows a structural example of a manufacturing device for a plate for a sliding nozzle device of the present invention, with the upper half being a top view and the lower half being a front view. [Fig. 2] A schematic diagram showing a state in which the initial rolling end of a strip-shaped thin iron plate is fixed to the outer peripheral side of the plate body. [Fig. 3] Fig. 3 (a) to (d) are schematic diagrams showing an example of a method of fixing the rolled end of a strip-shaped thin iron plate. [Fig. 4] Fig. 4 (a) to (e) are schematic diagrams showing other examples of fixing methods of the initial rolled end of the strip-shaped thin iron plate. [Fig. 5] is a schematic diagram showing an example of the shape of a recess provided in a part of the outer peripheral side surface of the plate main body. [Fig. 6] is a schematic diagram showing the winding process using a pressing jig that presses the strip-shaped thin iron plate along the outer peripheral side of the plate body. [Fig. 7] Fig. 7 (a) to (e) are schematic diagrams showing the process of winding the second layer of strip-shaped thin iron plates. [Fig. 8] is a schematic diagram showing an example of a structure in which a hoop and a fixing member are integrated. [Fig. 9] shows the shape and size of the plate main body used in Examples, Comparative Examples and Reference Examples. [Fig. 10] It is a schematic diagram showing the method of measuring the maximum compressive strain of the inner peripheral surface of the inner hole of the plate body. [Fig. 11] A graph showing the measurement results of the maximum compressive strain of the inner peripheral surface of the inner hole of the plate main body of the plates of Examples, Comparative Examples, and Reference Examples. [Fig. 12] is a graph showing the relationship between the heating temperature and the maximum compressive strain of the strip-shaped thin iron plate. [Fig. 13] is a graph showing the relationship between the tensile force applied to the strip-shaped thin iron plate and the maximum compressive strain.

A1:Board body

A1a:Inner hole

B: Strip thin iron plate

1: Plate holding mechanism

2: Iron plate holding mechanism

3: Rolling and sealing mechanism

4: Induction heating coil (heating method)

11: Loading platform

12: Motor

13: Fixed fixture (fixing means)

21:Keeping platform

22:Bearing department

31: Press the fixture

31a: Pressing part (roller)

32A, 32B: Pressing fixture

41: Radiation thermometer (thermometer)

111:Rotation axis

211:Rotation axis

221: Air brake (braking mechanism)

311:pin

312:Cylinder

312a: Cylinder rod

Claims (9)

A plate for a sliding nozzle device. A hoop formed by winding a strip-shaped thin iron plate in multiple layers is provided on the outer peripheral side of the main body of the plate made of refractory material. According to the method of measuring the strain released when the hoop is cut with a strain gauge, the maximum compressive strain of the inner circumferential surface of the inner hole of the plate body is 200με~1500με. A plate for a sliding mouth device as claimed in claim 1, wherein, A part of the outer circumferential side of the plate main body has a recess, and a fixing member is provided in the recess. The first rolled end of the strip-shaped thin iron plate is fixed to the fixing member. A plate for a sliding mouth device as claimed in claim 2, wherein, The hoop has a hole penetrating from the outermost layer of the hoop to the fixing member, and the hole is filled with a material for integrating the hoop and the fixing member. A method of manufacturing a plate for a sliding nozzle device in which a hoop formed by winding a strip-shaped thin iron plate in multiple layers is provided on the outer peripheral side of a plate main body made of refractory material. , This manufacturing method includes the step of applying a tensile force to the outer peripheral side of the plate body while heating the strip-shaped thin iron plate, and performing the winding step. The aforementioned winding process includes: displacing the strip-shaped thin iron plate along the outer circumferential side of the plate body so that a portion of the strip-shaped thin iron plate that starts to contact the outer circumferential side of the plate body is along the outer circumferential side of the plate body. The process of pressing the aforementioned strip-shaped thin iron plate with a pressing jig. A method for manufacturing a plate for a sliding mouth device as claimed in claim 4, wherein: The aforementioned rolling and sealing process includes: The process of pressing and fixing the vicinity of the rolling end of the strip-shaped thin iron plate to the outer peripheral side of the plate body at at least one place, and When winding the second layer of the strip-shaped thin iron plate near the initial rolling end of the strip-shaped thin iron plate, the vicinity of the initial rolling end of the aforementioned strip-shaped thin iron plate is pressed and fixed at at least one place on the aforementioned strip-shaped thin iron plate. The process of winding the second layer of strip-shaped thin iron plates on one side of the outer circumferential side of the plate main body. A method for manufacturing a plate for a sliding mouth device according to claim 4 or 5, wherein: In the aforementioned winding process, adjustment is made by changing at least one of the heating temperature of the strip-shaped thin iron plate, the tensile force applied to the strip-shaped thin iron plate, and the number of layers of the strip-shaped thin iron plate. The binding force on the main body of the aforementioned board. A device for manufacturing a plate for a sliding nozzle device, which is a device for manufacturing a plate for a sliding nozzle device in which a hoop formed by winding a strip-shaped thin iron plate in multiple layers is provided on the outer peripheral side of a plate main body made of refractory material , This manufacturing device is equipped with a winding and sealing mechanism for applying tensile force to the outer peripheral side of the plate body while heating the strip-shaped thin iron plate. The rolling sealing mechanism includes a pressing jig, and the pressing jig is such that the portion of the strip-shaped thin iron plate that starts to contact the outer circumferential side of the plate body is along the outer circumferential side of the plate body, with one edge The strip-shaped thin iron plate is pressed tightly while the outer peripheral side surface of the plate main body is displaced. A manufacturing device for a plate for a sliding mouth device as claimed in claim 7, wherein: The aforementioned rolling and sealing mechanism includes at least two pressing jigs, and the aforementioned pressing jigs are used to press and fix the vicinity of the initial rolling end of the aforementioned strip-shaped thin iron plate to the outer peripheral side of the aforementioned plate main body. Each of the aforementioned pressing fixtures can be moved to a fixed position and a retracted position. In the fixed position, the edge of the strip-shaped thin iron plate near the initial roll end is pressed and fixed to the outer peripheral side of the plate main body; in the retracted position, when in the aforementioned retracted position, When winding the second layer of strip-shaped thin iron plates near the starting end of the strip-shaped thin iron plate, avoid hindering the winding of the second layer of the aforementioned strip-shaped thin iron plates. For example, if the manufacturing device of the plate for the sliding mouth device of claim 7 or 8 is used, This includes a method of changing at least one of the heating temperature of the strip-shaped thin iron plate, the tensile force applied to the strip-shaped thin iron plate, and the number of layers of the strip-shaped thin iron plate.

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