Converter support mechanism and converter

Abstract

To provide a support mechanism for a converter that enables confirmation of loosening of a cotter. [Solution] In a converter 1 in which the furnace body 10 and trunnion ring 20 are separate, the furnace body has a flange 11 fixed around the furnace body and a slag cover 30 provided on the side of the furnace body, and the trunnion ring has a trunnion axis 21 attached to the trunnion ring in a direction perpendicular to the axial direction of the furnace body and a support neck 22 protruding from the trunnion ring in a direction parallel to the axis of the furnace body, a hole or groove is provided at a position of the flange that is covered by the slag cover, and a cotter hole is provided in the support neck, the support neck is fitted into a hole or groove provided in the flange and a cotter 50 is fitted into the cotter hole, and a support mechanism for a converter that supports the furnace body with the trunnion axis is provided, and the converter is provided with an inspection gauge 51 connected to the cotter and extending to the outside of the slag cover on the side, and an inspection gauge standard 31 connected to the slag cover and extending to the outside of the slag cover on the side.

Description

[Technical field]

[0001] The present invention relates to a support mechanism for a converter. [Background technology]

[0002] As a method of supporting the furnace body in a converter where the furnace body and trunnion ring are separate, for example, as disclosed in Patent Document 1, a mechanism is known in which a support neck protruding from the trunnion ring is fitted into a hole provided in a support ring (bracket) fixed to the furnace body, and a key (cotter) is driven into a cotter hole provided at the top of the support neck to secure it in place, structurally connecting the furnace body and the trunnion shaft, and supporting the furnace body with the trunnion shaft. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 48-3925 Summary of the Invention [Problem to be solved by the invention]

[0004] During converter operation, the difference in thermal expansion caused by the temperature difference between the furnace body and the trunnion ring may cause gaps to form at the load support points. In addition, the cotter may become loose when the converter is tilted. If operation using the converter continues with the cotter loose, the furnace body may move in an unexpected way, placing an unexpected load on the furnace body, which may cause problems such as cracks in the furnace body. Therefore, if the cotter is loose, it must be corrected immediately.

[0005] However, since the cotter is covered by a slag cover, it is not easy to check if the cotter is loose. In view of the above, the present invention aims to make it possible to check if the cotter is loose in the support mechanism of the converter. [Means for solving the problem]

[0006] The present invention has been made to solve the above problems and includes the following aspects.

[0007] (1) In a converter where the furnace body and the trunnion ring are separate, The furnace body is A flange fixed to the periphery of the furnace body; A slag cover provided on the surface of the flange Equipped with The trunnion ring is A trunnion axis attached to the trunnion ring in a direction perpendicular to the axial direction of the furnace body; A support neck protruding from the trunnion ring in a direction parallel to the axis of the furnace body; Equipped with A hole or a groove is provided at a position of the flange that is covered by the slag prevention cover, The support neck is provided with a cotter hole, A support mechanism for a converter, in which the support neck is fitted into a hole or groove provided in the flange, a cotter is fitted into the cotter hole, and the furnace body is supported by the trunnion shaft, An inspection gauge connected to the cotter and extending laterally outward of the slag cover; and an inspection gauge datum connected to the slag cover and extending laterally outward from the slag cover; A support mechanism for a converter, comprising:

[0008] (2) A support mechanism for the converter as described in (1) above, in which the cotter is positioned via a positioning shim arranged on the side of the support neck.

[0009] (3) A support mechanism for a converter as described in (1) or (2) above, in which a cotter stopper block is provided on the surface of the flange.

[0010] (4) A converter having the support mechanism according to any one of (1) to (3) above. Effect of the Invention

[0011] According to this invention, it is possible to check if the cotter in the support mechanism of the converter has loosened. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram showing an example of a converter using the converter support mechanism of the present invention. [Diagram 2] FIG. 2 is a diagram showing the periphery of a support mechanism of a converter. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present invention will now be described with reference to FIGS.

[0014] Fig. 1 is a diagram showing an example of a converter using the converter support mechanism of the present invention, and Fig. 2 is a diagram showing the periphery of the converter support mechanism shown in Fig. 1.

[0015] In Fig. 1, the converter 1 comprises a furnace body 10 and a trunnion ring 20 as separate bodies. The furnace body 10 comprises a flange 11 fixed to the periphery of the furnace body, and a slag cover 30 provided on the surface of the flange 11. The slag cover 30 protects a support neck, a cotter, and the like, which will be described later, from molten iron. At the position of the flange 11 covered by the slag cover 30, a hole or groove is provided for fitting a support neck, which will be described later.

[0016] The trunnion ring 20 is disposed in the middle of the furnace body 10. On both sides of the rotationally symmetrical positions of the trunnion ring 20, trunnion shafts 21 are attached in a direction perpendicular to the axial direction of the furnace body 10. Here, the axial direction of the furnace body 10 is the direction connecting the center of the furnace throat and the center of the hearth. In addition, a support neck 22 protruding in a direction parallel to the axis of the furnace body 10 is provided on the surface of the trunnion ring 20. The support neck 22 protrudes to a length sufficient to reach a hole or groove provided in the flange 11. The support neck 22 is provided with a cotter hole for fitting the cotter 50. The furnace body 10 is supported by the trunnion shaft 21 by fitting the support neck 22 into a hole or groove provided in the flange 11 and further fitting the cotter 50 into the cotter hole.

[0017] In addition, in Figures 1 and 2, the support neck 22, cotter 50, etc. covered by the slag cover 30 can be seen, but this is illustrated for the purpose of explaining the inner structure of the slag cover 30. The slag cover 30 may also cover the surface side that is approximately parallel to the side of the furnace body 10 in order to protect the support neck 22, cotter 50, etc. from molten iron.

[0018] In the converter support mechanism of the present invention, an inspection gauge 51 is connected to the cotter 50 and extends to the outside of the side of the slag cover 30. There is no limitation on the method of connecting the inspection gauge 51 to the cotter 50. For example, it may be screwed or welded. There is no limitation on the shape of the inspection gauge 51. For example, it may be cylindrical or prismatic. It may be hollow. In addition, the direction of the inspection gauge 51 is not important as long as it extends to the outside of the side of the slag cover 30. For example, it may extend in a direction parallel to the surface of the flange 11 and perpendicular to the axial direction of the furnace body 10.

[0019] In the converter support mechanism of the present invention, an inspection gauge datum 31 is further provided and connected to the slag cover 30, the inspection gauge datum 31 extending to the outside of the side of the slag cover 30. The method of connecting the inspection gauge datum 31 and the slag cover 30 is not limited. For example, it may be screwed or welded. The shape of the inspection gauge datum 31 is not limited. For example, it may be cylindrical or prismatic. It may be hollow. In addition, the direction of the inspection gauge datum 31 is not important as long as it extends to the outside of the side of the slag cover 30. For example, it may extend in a direction parallel to the surface of the flange 11 and perpendicular to the axial direction of the furnace body 10.

[0020] In the converter support mechanism of the present invention, the inspection gauge 51 extends to the outside of the slag cover 30, and the inspection gauge reference 31 is provided on the outside of the slag cover 30, so that these can be visually confirmed from the outside even when the inside of the slag cover 30 cannot be seen. If the cotter 50 becomes loose and shifts in position, the position of the inspection gauge 51 connected to the cotter 50 also shifts, and as a result, the positional relationship with the inspection gauge reference 31 connected to the slag cover 30 changes. Since the inspection gauge 51 and the inspection gauge reference 31 are visible, it is easy to confirm that the cotter 50 has become loose.

[0021] There is no particular limitation on the positional relationship between the inspection gauge 51 and the inspection gauge datum 31 under normal conditions. For example, the end faces of the inspection gauge 51 and the inspection gauge datum 31 may be at the same position in a direction approximately parallel to the surface of the flange 11.

[0022] In the support mechanism for the converter of the present invention, the cotter 50 may be positioned via a positioning shim 23 disposed on the side of the support neck 22. Also, a cotter stopper block 24 may be provided on the surface of the flange 11 around where the cotter 50 is disposed.

[0023] For example, if there is a problem with the positioning shim 23 or the cotter prevention block 24 due to heat or tilting of the converter, the cotter 50 will become loose, and similarly, the positional relationship between the inspection gauge 51 and the inspection gauge reference 31 will change, making it possible to confirm this occurrence.

[0024] The present invention has been described above with reference to the drawings. The specific embodiment of the converter shown in Figures 1 and 2 is merely an example, and it goes without saying that the specific device configuration is not limited to the example shown in Figures 1 and 2. Those skilled in the art may modify these embodiments as appropriate, and the technical scope of the present invention includes such modifications. [Explanation of symbols]

[0025] 1 Converter 10 Furnace body 11 Flange 20 Trunnion ring 21 Trunnion axis 22 Support neck 23 Positioning shim 24 Cotter retaining block 30 Slag prevention cover 31 Inspection gauge standards 50 Cotter 51 Inspection gauge

Claims

1. In a converter where the furnace body and the trunnion ring are separate, The furnace body is A flange fixed to the periphery of the furnace body; A slag cover provided on the surface of the flange Equipped with The trunnion ring is A trunnion axis attached to the trunnion ring in a direction perpendicular to the axial direction of the furnace body; A support neck protruding from the trunnion ring in a direction parallel to the axis of the furnace body; Equipped with A hole or a groove is provided at a position of the flange that is covered by the slag prevention cover, The support neck is provided with a cotter hole, A support mechanism for a converter, in which the support neck is fitted into a hole or groove provided in the flange, a cotter is fitted into the cotter hole, and the furnace body is supported by the trunnion shaft, An inspection gauge connected to the cotter and extending laterally outward of the slag cover; and an inspection gauge datum connected to the slag cover and extending laterally outward from the slag cover; A support mechanism for a converter, comprising:

2. 2. The converter support mechanism according to claim 1, wherein the cotter is positioned via a positioning shim provided on the side of the support neck.

3. 2. A support mechanism for a converter according to claim 1, further comprising a cotter stopper block provided on a surface of the flange.

4. A converter having the support mechanism according to any one of claims 1 to 3.

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