Skid rider for heating furnace

Abstract

A skid rider for a heating furnace, according to the present invention, comprises: a plurality of main body units arranged along a rail installed in a heating furnace and supporting a moving object; and a volume reduction unit extending downward from the main body units, disposed on the rail, and having a cross-sectional area smaller than that of the main body units.

Description

Skid rider for heating furnace

[0001] The present invention relates to a skid rider for a heating furnace that can maintain overall strength while reducing volume by removing a portion where the load applied by a moving object is relatively small.

[0002] Generally, heating furnaces are equipped to heat materials (slabs and blooms) produced through the continuous casting process in blast furnaces, converters, and electric furnaces within a steel mill.

[0003] Typically, metallurgical conditions, dimensions, and appearance of the slab are managed on the actual rolling line, but for more accurate management, it is required that the material be heated uniformly to the desired temperature through a heating furnace, and in particular, that it be heated uniformly in the width and length directions.

[0004] However, there is a problem in that shape deformation, such as thickness variation, may occur during rolling due to temperature variations on the surface of the material extracted from the heating furnace.

[0005] In addition, there is a problem where quality issues arise due to scratching on the surface of the material being transported caused by scale accumulated on the upper surface of the skid rider inside the furnace.

[0006] The background technology of the present invention is disclosed in Korean Registered Patent Publication No. 10-1769322 (published August 31, 2017, Title of Invention: Rider Member and Skid Device Using the Same).

[0007] The objective of the present invention is to provide a skid rider for a heating furnace that can reduce the volume of the lower part of the skid rider where the stress generated by the load of the moving object acts relatively less, while maintaining a strength for supporting the moving object above a set value.

[0008] Another objective of the present invention is to provide a skid rider for a heating furnace that can improve maintenance efficiency by allowing only the upper part of the skid rider, which is deformed or damaged by a collision with a moving object, to be separated and replaced.

[0009] A skid rider for a heating furnace according to one aspect of the present invention comprises: a main body portion that supports a moving object and is arranged in plurality along a rail installed inside the heating furnace; and a volume-saving portion that extends downward from the main body portion, is arranged on the rail, and has a cross-sectional area smaller than that of the main body portion.

[0010] The above main body may include an upper part formed by creating a curved surface at the corner that collides with the moving object.

[0011] The upper part is manufactured separately from the main body and can be detachably coupled to the main body.

[0012] The upper portion is manufactured separately from the main body portion and is detachably coupled by a connecting portion, and the connecting portion may include a connecting projection protruding from either the upper portion or the main body portion; and a connecting groove formed in the other of the upper portion and the main body portion so as to insert the connecting projection.

[0013] The above connecting portion further includes a fixing portion that prevents the connecting projection from being separated from the connecting groove portion, and the fixing portion may include a fixing hole portion extending from one side of the main body portion to the other side; and a fixing member inserted into the fixing hole portion to pass through the connecting projection.

[0014] The above fixing member further includes a separation prevention member that prevents the fixing member from detaching from the fixing hole member, and the separation prevention member may include a prevention hole member formed in the fixing member; and a pin member inserted into the prevention hole member and restraining the fixing member while interfering with the fixing hole member when the fixing member is separated from the fixing hole member.

[0015] The above volume reduction part may include a reduction groove formed concavely inwardly on the lower side of the main body part.

[0016] The width of the above-mentioned reduction groove can be formed at a ratio of 0.5 to 0.8 times the width of the above-mentioned main body.

[0017] The above-mentioned reduction groove may include an inclined surface formed inwardly inclined from the main body; a vertical surface extending vertically from the bottom of the inclined surface; and a horizontal portion extending laterally from the bottom of the vertical surface.

[0018] The skid rider for a heating furnace according to the present invention has a volume-reducing portion formed by reducing the volume of the lower portion, where the amount of stress generated by the load of a moving object is relatively lower compared to the main body portion and the upper portion. Therefore, compared to conventional skid riders, it can maintain the same or similar strength with a smaller volume, which has the advantage of reducing material costs required for manufacturing the skid rider.

[0019] In addition, the skid rider for a heating furnace according to the present invention has the advantage of being able to eliminate the separation operation of separating the entire skid rider from the rail and reducing the time and cost required for skid rider replacement work, as the upper part, which is in direct contact with and collides with a high-temperature moving object, is detachably coupled to the main body so that if the upper part of the skid rider is damaged by thermal energy or impact transmitted from the moving object, only the upper part can be separated from the main body and replaced with a new upper part.

[0020] FIG. 1 is a perspective view showing a skid rider for a heating furnace according to a first embodiment of the present invention.

[0021] FIG. 2 is a usage diagram showing a skid rider for a heating furnace according to the first embodiment of the present invention.

[0022] FIG. 3 is a table showing the change in stress according to the width-length ratio of the segment reduction part of a skid rider for a heating furnace according to the first and second embodiments of the present invention.

[0023] FIG. 4 is a perspective view showing a skid rider for a heating furnace according to a second embodiment of the present invention.

[0024] FIG. 5 is a cross-sectional view showing a skid rider for a heating furnace according to a second embodiment of the present invention.

[0025] FIG. 6 is an exploded perspective view showing a skid rider for a heating furnace according to a second embodiment of the present invention.

[0026] FIG. 7 is a table showing the change in stress according to the change in the thickness of the upper part of a skid rider for a heating furnace according to the second embodiment of the present invention.

[0027] FIG. 8 is a table showing the heat transfer analysis results of a skid rider for a heating furnace according to the first and second embodiments of the present invention.

[0028] FIG. 9 is a table showing the optimal determination values ​​of a skid rider for a heating furnace according to the second embodiment of the present invention.

[0029] FIG. 10 is a cross-sectional view showing a skid rider for a heating furnace according to a third embodiment of the present invention.

[0030] Hereinafter, an embodiment of a skid rider for a heating furnace according to the present invention will be described with reference to the attached drawings.

[0031] In this process, the thickness of lines or the size of components depicted in the drawings may be exaggerated for the sake of clarity and convenience of explanation. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intent or convention of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification.

[0032] Furthermore, in this specification, when a part is described as being "connected (or joined)" to another part, this includes not only cases where they are "directly connected (or joined)" but also cases where they are "indirectly connected (or joined)" with other members interposed between them. In this specification, when a part is described as "including (or having) a certain component," this means that, unless specifically stated otherwise, it does not exclude other components but may additionally "include (or have)" other components.

[0033] Furthermore, throughout this specification, the same reference numerals may refer to the same components. Even if the same or similar reference numerals are not mentioned or described in a specific drawing, they may be described based on other drawings. Additionally, even if a part is not indicated by a reference numeral in a specific drawing, that part may be described based on other drawings. Furthermore, the number, shape, size, and relative differences in size of the detailed components included in the drawings of this application are set for ease of understanding and do not limit the embodiments, and may be implemented in various forms.

[0034] FIG. 1 is a perspective view showing a skid rider for a heating furnace according to a first embodiment of the present invention, FIG. 2 is a usage state diagram showing a skid rider for a heating furnace according to a first embodiment of the present invention, and FIG. 3 is a table showing stress changes according to the width-length ratio of the volume reduction part of a skid rider for a heating furnace according to a first embodiment and a second embodiment of the present invention.

[0035] Referring to FIGS. 1 to 3, a plurality of skid riders (1) for a heating furnace according to the first embodiment of the present invention may be arranged in a row on a rail (80) installed inside a heating furnace (F). The rail (80) may be installed to extend from inside the heating furnace (F) to a set point outside the heating furnace (F). A plurality of skid riders (1) for a heating furnace may be arranged in a row along the rail (80) in a spaced-apart or contacted state from each other.

[0036] A skid rider (1) for a heating furnace may include a main body (10) that contacts and supports a moving object (M), and a volume reduction part (15) that extends downward from the main body (10) and is formed with a smaller cross-sectional area compared to the main body (10). As shown in FIG. 1, the cross-sectional area may refer to a cross-sectional area. The main body (10) may have sufficient strength to stably support the moving object (M). The volume reduction part (15) may be referred to as a reduction part as its cross-sectional area is formed to be smaller than that of the main body (10).

[0037] Accordingly, compared to a conventional skid rider that does not include a volume reduction part (15), the skid rider (1) for a heating furnace of the present embodiment has a volume reduced by the amount of the part omitted from the volume reduction part (15), thereby reducing the amount of material required to manufacture the skid rider.

[0038] In the present embodiment, the cost of replacing the skid rider (1) for a heating furnace is significantly reduced because the material cost required for manufacturing is reduced. This is achieved even when the heating furnace (F) is operated for a long period and a high-temperature moving object (M) discharged from it collides with the skid rider and is deformed or damaged.

[0039] The main body (10) may include an upper part (12) formed by creating a curved surface (14) at the corner that collides with the moving object (M). Accordingly, when the moving object (M) collides with the corner of the upper part (12), the moving object (M) slides due to the curved surface (14), thereby offsetting the impact applied to the corner of the upper part (12).

[0040] The volume reduction portion (15) includes a reduction groove portion (16) formed concavely inwardly on the lower part of the main body portion (10), and the width of the reduction groove portion (16) can be set at a ratio of 0.5 to 0.8 times the width of the main body portion (10).

[0041] This result was obtained by conducting an experiment to measure the stress generated in the upper and lower parts of a skid rider while gradually reducing the thickness of the lower part, targeting a conventional skid rider without a volume reduction groove (16). As shown in the table in FIG. 3, when the width of the volume reduction part (15) is at a ratio of 0.5 to 0.8 times the width of the main body part (10), the stress formed in the volume reduction part (15) is maintained at 1.3005 to 1.5595, confirming that there is little change in stress.

[0042] When the width of the volume reduction part (15) is greater than 0.8 times the width of the main body part (10), the amount of stress reduction is negligible, and the effect of reducing material costs is also negligible, so it is judged that it is difficult to provide technical significance through the formation of the volume reduction part (15). When the width of the volume reduction part (15) is less than 0.5 times the width of the main body part (10), the stress formed in the volume reduction part (15) becomes significantly larger, so there is a problem that deformation or damage may occur in the volume reduction part (15) due to the load of the moving object (M).

[0043] The reduction groove (16) may include an inclined surface (17) formed to be inclined inward from the main body (10), a vertical surface (18) extending vertically from the bottom of the inclined surface (17), and a horizontal section (19) extending sideways from the bottom of the vertical surface (18). Two horizontal sections (19) may be provided spaced apart on one side of the vertical surface (18). According to the present embodiment, two horizontal sections (19) may be provided on the left vertical surface (18) with respect to FIG. 1, and two horizontal sections (19) may also be symmetrically provided on the right vertical surface (18).

[0044] According to the present embodiment, the cross-sectional area of ​​the inclined surface (17) is smaller than that of the main body (10), and the cross-sectional area of ​​the vertical surface (18) is also formed to be smaller than that of the main body (10). In particular, the vertical surface (18) is a portion connected to the lowest end of the inclined surface (17), and its cross-sectional area may be equal to the smallest cross-sectional area among the cross-sectional areas of the inclined surface (17).

[0045] The volume reduction section (15), which includes an inclined surface (17) and a vertical surface (18), is designed so that its cross-sectional area is reduced compared to the main body (10), thereby reducing the overall volume of the skid rider. Accordingly, the amount of material required for production is reduced, thereby reducing the burden of material costs.

[0046] In addition, the shape of the reduction groove (16) does not decrease in width rapidly but extends along the inclined surface (17) to the vertical surface (18) and gradually narrows, so that the load is not concentrated on a specific part of the reduction groove (16), thereby preventing deformation or damage.

[0047] FIG. 4 is a perspective view showing a skid rider for a heating furnace according to a second embodiment of the present invention, FIG. 5 is a cross-sectional view showing a skid rider for a heating furnace according to a second embodiment of the present invention, and FIG. 6 is an exploded perspective view showing a skid rider for a heating furnace according to a second embodiment of the present invention. FIG. 7 is a table showing stress changes according to changes in the thickness of the upper part of a skid rider for a heating furnace according to a second embodiment of the present invention, FIG. 8 is a table showing the heat transfer analysis results of a skid rider for a heating furnace according to a first embodiment and a second embodiment of the present invention, and FIG. 9 is a table showing the optimal determination values ​​of a skid rider for a heating furnace according to a second embodiment of the present invention. Since components given the same reference numerals in the first and second embodiments have the same structure and function, details that overlap with the first embodiment are omitted in the following description of the second embodiment.

[0048] Referring to FIGS. 4 to 9, the upper part (12) of the skid rider (2) for a heating furnace according to the second embodiment of the present invention can be manufactured separately from the main body part (10). Therefore, since the upper part (12) is detachably coupled to the main body part (10), when the upper part (12) is deformed or damaged while colliding with a moving object (M), the entire skid rider does not need to be replaced, and the replacement of the skid rider can be completed by separating only the upper part (12) from the main body part (10).

[0049] The upper part (12) is manufactured separately from the main body part (10) and can be detachably connected by a connecting part (30). The connecting part (30) may include a connecting projection (32) protruding from either the upper part (12) or the main body part (10), and a connecting groove (34) formed in the other of the upper part (12) and the main body part (10) so that the connecting projection (32) is inserted.

[0050] Therefore, when the upper part (12) is placed on the upper surface of the main body (10), the connecting projection (32) is inserted into the connecting groove (34), and the upper part (12) can be coupled to the upper surface of the main body (10). In this way, the connecting projection (32) and the connecting groove (34), which are formed in a vertical direction, can prevent the upper part (12) from slipping or moving laterally from the main body (10).

[0051] The connecting portion (30) may further include a fixing portion (50) that prevents the connecting projection (32) from being separated from the connecting groove portion (34). The fixing portion (50) may include a fixing hole portion (54) extending from one side of the main body portion (10) to the other side, and a fixing member (52) inserted into the fixing hole portion (54) to pass through the connecting projection (32).

[0052] The fixing hole portion (54) is formed in a direction spaced apart from the connecting groove portion (34), and the fixing member (52) inserted into the fixing hole portion (54) passes through the connecting projection (32) inserted into the connecting groove portion (34). Accordingly, a through hole portion (36) through which the fixing member (52) can pass can be formed in the connecting projection (32).

[0053] As described above, since a fixing member (52) inserted horizontally along the fixing hole (54) is inserted into a connecting projection (32) inserted vertically, it is possible to prevent the connecting projection (32) from being separated to the outside of the connecting groove (34).

[0054] The fixing part (50) may further include a separation prevention part (56) that prevents the fixing member (52) from being separated from the fixing hole part (54). The separation prevention part (56) includes a prevention hole part (58) formed in the fixing member (52) and a pin member (57) inserted into the prevention hole part (58) and restraining the fixing member (52) by interfering with the fixing hole part (54) when the fixing member (52) is separated from the fixing hole part (54).

[0055] The pin member (57) is formed in the shape of a plate spring with a variable width and is inserted into a prevention hole (58) formed in a direction perpendicular to the extension direction of the fixing member (52). As the pin member (57) is inserted into the prevention hole (58) and compressed, the pin member (57) can be pressed in so as not to be separated to the outside of the prevention hole (58) while adhering to the inner wall of the prevention hole (58).

[0056] As described above, after the fixing member (52) penetrates to the other side of the main body (10) through the fixing hole (54), a pin member (57) is attached to the end of the fixing member (52) protruding to the other side of the main body (10) to prevent the fixing member (52) from being separated from the fixing hole (54).

[0057] As shown in FIG. 7, even if the thickness of the upper part (12) exceeds 15 mm, the magnitude of the stress generated in the upper part (12) does not increase or decrease significantly, so it is suitable to manufacture the upper part (12) with a thickness of 10 to 15 mm, and based on the analysis data shown in FIG. 8, the optimal skid rider size and shape described in FIG. 9 can be determined.

[0058] FIG. 10 is a cross-sectional view illustrating a skid rider for a heating furnace according to the third embodiment of the present invention. Since the components given the same reference numerals in the first, second, and third embodiments have the same structure and function, any details that overlap with the first or second embodiment in the following description of the third embodiment are omitted.

[0059] Referring to FIG. 10, the skid rider (3) for a heating furnace according to the third embodiment of the present invention may further include a release portion (70) and a fusion prevention portion (76) compared to the skid rider (2) for a heating furnace according to the second embodiment. The release portion (70) can separate the connecting projection (32) pressed into the main body portion (10) from the connecting groove portion (34) when the upper portion (12) is separated from the main body portion (10). The fusion prevention portion (76) can prevent foreign matter from entering the pin member (57) and the prevention hole portion (58).

[0060] The release portion (70) may include a release groove portion (72) formed in one or more of the upper portion (12) or the main body portion (10), and a plug member (74) inserted into the release groove portion (72) to prevent foreign matter from entering the release groove portion (72).

[0061] Accordingly, when separating the upper part (12) from the main body (10), the pin member (57) and the fixing member (52) are separated in sequence, and then the plug member (74) is separated from the release groove (72) to expose the release groove (72). Afterward, by inserting a jig into the release groove (72) and repeatedly moving the jig back and forth in the upper and lower directions, the upper part (12) that was in close contact with the main body (10) can be easily separated from the main body (10), and the connecting projection (32) can be easily separated from the connecting groove (34).

[0062] The fusion prevention part (76) may include a cap member (77) that covers the pin member (57) and a release lever (78) extending from the cap member (77). Accordingly, after inserting the pin member (57) into the prevention hole part (58), the cap member (77) is installed to cover the pin member (57) and the prevention hole part (58), thereby preventing foreign matter from entering through the gap between the pin member (57) and the prevention hole part (58), and thus preventing a malfunction in which the pin member (57) is not separated from the prevention hole part (58). On the rail (80), a skid rider (1, 2, 3) for a heating furnace according to an embodiment of the present invention may be installed continuously while maintaining a constant spacing.

[0063] Thus, it is possible to provide a skid rider for a heating furnace in which the volume of the skid rider is reduced in the lower part where stress generated by the load of the moving object (M) is relatively low, the strength for supporting the moving object (M) is maintained above a certain level, and only the upper part that is deformed or damaged by collision with the moving object (M) can be separated and replaced.

[0064] Although the present invention has been described with reference to an embodiment illustrated in the drawings, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom.

[0065] Furthermore, although a skid rider for a heating furnace has been described as an example, this is merely illustrative, and the skid rider of the present invention may be used in products other than heating furnaces. Therefore, the true technical scope of protection of the present invention should be determined by the following claims.

Claims

1. A main body portion that supports a moving object and is arranged in multiple numbers along a rail installed inside a heating furnace; and A skid rider for a heating furnace characterized by including a volume-saving member that extends downward from the main body and is disposed on the rail, and has a smaller cross-sectional area compared to the main body.

2. In Paragraph 1, A skid rider for a heating furnace, characterized in that the main body part comprises an upper part formed by creating a curved surface at the corner that collides with the moving object.

3. In Paragraph 2, A skid rider for a heating furnace, characterized in that the upper portion is manufactured separately from the main body and is detachably coupled to the main body.

4. In Paragraph 2, The upper part is manufactured as a separate part from the main body and is detachably connected by a connecting part, and The above connecting part is, A connecting projection protruding from either of the upper portion and the main body portion; and A skid rider for a heating furnace characterized by including a connecting groove formed in the other of the upper part and the main body part so that the above connecting projection is inserted.

5. In Paragraph 4, The above connecting portion further includes a fixing portion that prevents the connecting projection from being separated from the connecting groove portion, and The above fixed part is, A fixing hole portion extending from one side of the main body portion to the other side; and A skid rider for a heating furnace characterized by including a fixing member inserted into the fixing hole portion to pass through the connecting projection.

6. In Paragraph 5, The above fixing part further includes a separation prevention part that prevents the fixing member from detaching from the fixing hole part, and The above separation prevention unit is, A prevention hole portion formed in the above-mentioned fixed member; and A skid rider for a heating furnace characterized by including a pin member inserted into the above-mentioned prevention hole portion and restraining the above-mentioned fixing member while interfering with the above-mentioned fixing hole portion when the above-mentioned fixing member is separated from the above-mentioned fixing hole portion.

7. In Paragraph 1, A skid rider for a heating furnace, characterized in that the above-mentioned volume reduction part includes a reduction groove formed concavely inwardly on the lower side of the main body part.

8. In Paragraph 7, A skid rider for a heating furnace characterized in that the width of the above-mentioned reduction groove is formed at a ratio of 0.5 to 0.8 times the width of the above-mentioned main body.

9. In Clause 7, the above-mentioned reduction groove is, An inclined surface formed inwardly from the main body; A vertical plane formed by extending vertically from the bottom of the above-mentioned inclined plane; and A skid rider for a heating furnace characterized by including a horizontal section extending laterally from the bottom of the vertical plane.

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