Device for temporarily repairing falling-off skirt cover of stepping furnace on line and mounting method

Abstract

The invention relates to the technical field of metallurgy, and discloses a device for temporarily repairing a falling skirt cover of a stepping furnace on line and an installation method.The device comprises a flange ring, a plurality of supporting rods are arranged on the flange ring in the circumferential direction at intervals, and each supporting rod is provided with a plurality of prefabricated block installation supporting plates in the vertical direction; a plurality of first prefabricated blocks are arranged on the flange ring, and an annular structure matched with the flange ring in shape is defined by the multiple first prefabricated blocks; a plurality of second prefabricated blocks are arranged between every two adjacent supporting rods in a laminated mode, each second prefabricated block is arranged on the prefabricated block installation supporting plates of every two adjacent supporting rods, and the multiple second prefabricated blocks on each layer define an annular structure matched with the flange ring in shape. And a ceramic fiber tapestry is arranged below the flange ring. According to the device for temporarily repairing the fallen skirt cover of the stepping heating furnace on line, repairing replacement can be completed on line in a short time, the interior of the furnace and the exterior of the furnace can be separated in time, and the situation of production halt caused by further deterioration of the situation is avoided.

Description

Technical Field

[0001] The present invention relates to the field of metallurgical technology, and particularly to a device and an installation method for temporarily and online repairing a falling skirt of a walking beam furnace. Background Art

[0002] A walking beam reheating furnace (walking beam furnace) is a heating furnace that moves billets forward step by step by the rising, advancing, descending, and retreating actions of the furnace bottom or water-cooled metal beams. It relies on a special walking mechanism to move along a certain trajectory (usually a rectangular trajectory), so that the steel materials in the furnace move forward step by step.

[0003] In the prior art, a water seal groove, upper and lower skirts, a slag scraping plate, and a walking beam are provided at the bottom of the walking beam reheating furnace. Normally, the bottom refractory, the bottom steel plate, the upper skirt, the lower skirt, and the slag scraping plate form an integral body A, and the walking beam and the water seal groove form an integral body B. The column moves up, down, forward, and backward in the space of the skirt. The two integral bodies move relative to each other. Once a relatively large hard object falls into this space and foreign objects are blocked in the skirt, it will hinder the movement of the column of the incoming beam and damage the relative movement between the water beam column and the water skirt and the slag scraping plate. Usually, the steel plate of the upper skirt is welded to the bottom steel plate of the furnace. The blockage will cause the steel plate of the upper skirt to be finally welded off from the bottom steel plate of the furnace, and the two will move relative to each other, and then gradually damage the bottom refractory of the furnace. The bottom of the furnace loses heat insulation, the bottom of the furnace is separated from the skirt, and the furnace chamber penetrates through the outside, resulting in the shutdown of the furnace. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above problems existing in the prior art, and provide a device and an installation method for temporarily and online repairing a falling skirt of a walking beam furnace. This solution can solve the problem of accidental falling of the skirt of the walking beam furnace, and can separate the inside and outside of the furnace in time through the device for temporarily and online repairing the falling skirt of the walking beam furnace, avoiding further deterioration.

[0005] To achieve the above purpose, on the one hand, the present invention provides a device for temporarily and online repairing a falling skirt of a walking beam furnace, including a flange ring. A plurality of support rods are arranged at intervals along the circumference of the flange ring, and each support rod is provided with a plurality of precast block installation brackets along the vertical direction;

[0006] A plurality of first precast blocks are arranged on the flange ring, and the plurality of first precast blocks enclose to form an annular structure adapted to the shape of the flange ring;

[0007] A plurality of second precast blocks are arranged in a stacked manner between adjacent support rods, and each second precast block is arranged on the precast block installation brackets of adjacent support rods. The plurality of second precast blocks in each layer enclose to form an annular structure adapted to the shape of the flange ring;

[0008] A ceramic fiber hanging blanket is arranged below the flange ring.

[0009] Preferably, the gap of the device for temporarily online repairing the falling skirt of the walking beam furnace is filled with refractory mortar.

[0010] Preferably, the materials of the first precast block and the second precast block are ceramic fiber.

[0011] Preferably, the support rod is hinged to the flange ring.

[0012] Preferably, the materials of the flange ring, the support rod and the precast block mounting plate are all stainless steel.

[0013] Preferably, the second precast block is located on the first precast block.

[0014] Preferably, a clamping groove is formed on the outer side of each first precast block, and the first precast block is clamped on the flange ring through the clamping groove.

[0015] Preferably, a plurality of mounting holes are arranged at intervals along the circumferential direction on the flange ring, and bolts for threadedly connecting ceramic fiber blankets are arranged in the mounting holes

[0016] Preferably, the shape of the ceramic fiber blanket is adapted to that of the flange ring, and a steel mesh layer is arranged in the ceramic fiber blanket.

[0017] The second aspect of the present invention provides an installation method for a device for temporarily online repairing the falling skirt of a walking beam furnace, including the following steps:

[0018] When the upper skirt and the lower skirt of the walking beam furnace are damaged, the damaged upper skirt and lower skirt are removed, a flange ring is installed on the walking beam, a plurality of support rods are installed at intervals along the circumferential direction on the flange ring, a plurality of precast block mounting plates are installed on each support rod in the vertical direction, and then a plurality of first precast blocks and a plurality of second precast blocks are installed, the gap is filled with refractory mortar, and then a ceramic fiber blanket is installed below the flange ring.

[0019] The present invention uses a bracket, a precast block and a ceramic fiber blanket to construct a device for temporarily online repairing the falling skirt of a walking beam heating furnace, which can complete the repair and replacement online in a short time, and can timely separate the inside and outside of the furnace to avoid the situation of further deterioration and production stoppage. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the device for temporarily online repairing the falling skirt of the walking beam furnace of the present invention;

[0021] Figure 2 is a structural schematic diagram of the device for temporarily online repairing the falling skirt of the walking beam furnace of the present invention;

[0022] Figure 3 is a schematic diagram of the first precast block and the second precast block of the present invention;

[0023] Figure 4 Schematic diagram of the installation position of the first precast block of the present invention;

[0024] Figure 5 Schematic diagram of the installation position of the second precast block of the present invention;

[0025] Figure 6 Schematic diagram of the assembly direction of the upper skirt cover and the furnace bottom steel plate of the present invention;

[0026] Figure 7 Schematic diagram of the horizontal running direction of the walking beam of the present invention;

[0027] Figure 8 Schematic diagram of the position where foreign objects are blocked inside the skirt cover of the present invention;

[0028] Figure 9 Schematic diagram of the slag scraping plate of the present invention;

[0029] Figure 10 Schematic diagram of the installation position of the slag scraping plate of the present invention;

[0030] Figure 11 Schematic diagram of the welding detachment and skirt cover detachment of the upper skirt cover and the furnace bottom steel plate of the present invention;

[0031] Figure 12 Schematic diagram of the articulated device of the present invention;

[0032] Figure 13 Schematic diagram of the structure of the articulated device of the present invention;

[0033] Figure 14 Schematic diagram of the disassembly of the articulated device of the present invention;

[0034] Figure 15 Schematic diagram of the positions of the articulated shaft and the convex ring of the present invention;

[0035] Figure 16 Cross-sectional view of the ceramic fiber hanging blanket of the present invention;

[0036] Figure 17 Schematic diagram of the installation process of the device for temporarily and online repairing the fallen skirt cover of the walking beam furnace of the present invention;

[0037] Figure 18 Schematic diagram of the installation process of the device for temporarily and online repairing the fallen skirt cover of the walking beam furnace of the present invention;

[0038] Figure 19 Schematic diagram of the installation process of the device for temporarily and online repairing the fallen skirt cover of the walking beam furnace of the present invention;

[0039] Figure 20 Schematic diagram of the installation process of the device for temporarily and online repairing the fallen skirt cover of the walking beam furnace of the present invention;

[0040] Figure 21 It is a schematic diagram of the installation process of the device for temporarily and online repairing the falling skirt of the walking beam furnace in the present invention.

[0041] Explanation of reference numerals

[0042] 1 - Furnace bottom refractories, 2 - Walking beam, 3 - Horizontal running direction of the walking beam, 4 - Lower skirt, 5 - Furnace bottom steel plate, 6 - Upper skirt, 7 - Water seal groove, 8 - Slag scraping plate, 9 - Foreign objects stuck inside the skirt, 10 - Welding steel plate of the upper skirt, 11 - Assembly direction of the upper skirt and the furnace bottom steel plate, 12 - Flange ring, 13 - Support rod, 14 - Prefabricated block installation support plate, 15 - First prefabricated block, 16 - Second prefabricated block, 17 - Ceramic fiber hanging blanket, 171 - Steel mesh layer, 18 - Installation hole, 19 - Hinge device, 191 - Upper hinge component, 192 - Lower hinge component, 193 - Hinge shaft, 194 - Convex ring, 195 - Connecting plate. Specific embodiments

[0043] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0044] In the ranges disclosed herein, the endpoints and any values are not limited to the exact ranges or values. These ranges or values should be understood to include values close to these ranges or values. For numerical ranges, between the endpoint values of each range, between the endpoint values of each range and individual point values, and between individual point values, they can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein.

[0045] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0046] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments provided by the present invention can be combined with each other, but it must be based on the fact that those skilled in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0047] Example 1

[0048] As Figures 1-5 shown in the device for temporarily online repairing the falling skirt of the walking beam furnace, which includes a flange ring 12. A plurality of support rods 13 are circumferentially and spacedly arranged on the flange ring 12, and each support rod 13 is provided with a plurality of precast block mounting brackets 14 in the vertical direction;

[0049] A plurality of first precast blocks 15 are arranged on the flange ring 12, and the plurality of first precast blocks 15 enclose to form an annular structure adapted to the shape of the flange ring 12;

[0050] A plurality of second precast blocks 16 are arranged in a stacked manner between adjacent two support rods 13, and each second precast block 16 is arranged on the precast block mounting brackets 14 of the adjacent two support rods 13. The plurality of second precast blocks 16 in each layer enclose to form an annular structure adapted to the shape of the flange ring 12;

[0051] A ceramic fiber hanging blanket 17 is arranged below the flange ring 12.

[0052] Among them, the schematic diagram of the installation position of the first precast block 15 is as shown in Figure 4, and the schematic diagram of the installation position of the second precast block 16 is as Figure 5 shown.

[0053] Among them, as Figures 6-10 shown, the walking beam furnace of the present invention includes an overall A and an overall B. The overall A includes a furnace bottom refractory 1, a furnace bottom steel plate 5, an upper skirt 6, a lower skirt 4 and a slag scraping plate 8. The overall B includes a walking beam 2 and a water seal tank 7. An upper skirt welding steel plate 10 is arranged on the upper skirt 6; Among them, the schematic diagram of the slag scraping plate 8 is as Figure 9 shown, and the schematic diagram of the installation position of the slag scraping plate 8 is as Figure 10 shown.

[0054] When a hard object enters the skirt space and gets stuck, as Figure 8 shown, the relative movement between the column of the walking beam 2 and the skirt is blocked, thereby squeezing the furnace bottom refractory 1, the furnace bottom steel plate 5, the upper skirt 6, the lower skirt 4 and the slag scraping plate 8, causing the furnace bottom steel plate 5 and the upper skirt welding steel plate 10 to be de-welded and have relative movement, and then gradually damaging the furnace bottom refractory 1. The furnace bottom loses heat insulation, and the furnace bottom is separated from the upper skirt 6 and the lower skirt 4. As Figure 11 shown, this will cause the furnace chamber to penetrate with the outside and result in furnace shutdown.

[0055] Therefore, when a hard object enters the skirt space and jams occur, and the upper skirt 6 and the lower skirt 4 are damaged and fall off, the device for temporarily online repairing the fallen skirt of the walking beam furnace of the present invention can be used to temporarily replace the damaged and fallen upper skirt 6 and lower skirt 4 at this place, avoiding furnace shutdown. Moreover, the installation and implementation time of this device is short, and it can be used for a long time. During periodic maintenance, the scale accumulated at the lower part is cleaned, and then wait for an appropriate time to shut down the furnace to restore the upper skirt 6 and lower skirt 4 at this place.

[0056] In a specific embodiment, to facilitate the installation of the flange ring 12, the flange ring 12 is composed of two semi-circular components, and these two semi-circular components are welded together to form a whole flange ring 12.

[0057] Furthermore, the gaps in the device for temporarily online repairing the fallen skirt of the walking beam furnace of the present invention are also filled with refractory mortar; for example, the gaps between the first precast block 15 and the second precast block 16, the gaps between adjacent second precast blocks 16, the gaps between adjacent first precast blocks 15, the gaps between the second precast block 16 and the precast block installation support plate 14, etc. will all be filled with refractory mortar to ensure the airtightness of the device.

[0058] In the present invention, a plurality of support rods 13 are evenly spaced along the circumferential direction on the flange ring 12, and a plurality of precast block installation support plates 14 are evenly arranged along the vertical direction on each support rod 13. The specific number and height of the support rods 13 and the number of precast block installation support plates 14 on each support rod 13 are determined according to the specific working conditions required; in a specific embodiment, four support rods 13 are evenly spaced along the circumferential direction on the flange ring 12, and the number of precast block installation support plates 14 on each support rod 13 is the same.

[0059] Furthermore, a plurality of first precast blocks 15 are arranged on the flange ring 12, and one first precast block 15 is arranged between adjacent two support rods 13 (that is, the number of the first precast blocks 15 is the same as the number of the support rods 13), and these plurality of first precast blocks 15 enclose a ring structure adapted to the shape of the flange ring 12.

[0060] In the present invention, the materials of the used first precast block 15 and second precast block 16 are heat-resistant ceramic fibers.

[0061] For the convenience of installation, in a specific embodiment, a card slot is opened on the outer side of each first precast block 15 (as Figure 3 shown), and each first precast block 15 is clamped inside the flange ring 12 through its respective card slot.

[0062] In a preferred case, the second precast blocks 16 are all located on the first precast blocks 15.

[0063] Further, except for the second prefabricated block 16 at the top layer, each of the remaining second prefabricated blocks 16 is adaptively arranged between two adjacent prefabricated block mounting brackets 14 of the same support rod 13.

[0064] In a preferred case, the number of second prefabricated blocks 16 used in each layer is the same as the number of first prefabricated blocks 15.

[0065] The present invention uses a plurality of first prefabricated blocks 15 and a plurality of second prefabricated blocks 16 to facilitate adjustment during single-piece installation, because direct installation of the whole piece may be limited by space operation and weight.

[0066] Among them, the specific number of layers of the second prefabricated blocks 16 arranged in a stack depends on the specific working conditions required. In the present invention, the overall structure finally formed by enclosing the first prefabricated blocks 15 and the second prefabricated blocks 16 is used to temporarily replace the damaged upper skirt 6. Therefore, the specific numbers, sizes, and shapes of the first prefabricated blocks 15 and the second prefabricated blocks 16 only need to meet the requirement that they can jointly replace the damaged upper skirt 6 finally.

[0067] In the present invention, the materials of the flange ring 12, the support rod 13, and the prefabricated block mounting bracket 14 are all heat-resistant stainless steel, such as 0Cr18Ni9.

[0068] In a specific embodiment of the present invention, each support rod 13 is hinged to the flange ring 12 to facilitate adaptation to the site during installation; further, each support rod 13 is hinged to the flange ring 12 through a corresponding hinge device 19 (the number of support rods 13 is the same as the number of hinge devices 19), as Figure 12 shown (in order to facilitate showing the hinge device 19, the welds on the flange ring 12 are not shown in Figure 12 .

[0069] Specifically, as Figures 13-15 shown, the hinge device 19 includes an upper hinge member 191, a lower hinge member 192, and a hinge shaft 193. Among them, two convex rings 194 are provided on the lower hinge member 192, the hinge shaft 193 is rotatably arranged in the two convex rings 194, two connecting plates 195 are provided on the upper hinge member 191, both of the two connecting plates 195 are fixedly connected to the hinge shaft 193, the upper hinge member 191 is welded to the corresponding support rod 13, and the lower hinge member 192 is welded to the flange ring 12.

[0070] Among them, a plurality of mounting holes 18 are evenly spaced along the circumference on the outer side of the flange ring 12, and bolts for threadedly connecting the ceramic fiber hanging blanket 17 are provided in these mounting holes 18.

[0071] The ceramic fiber tapestry 17 in the present invention is adapted to the shape of the flange ring 12, and a steel mesh layer 171 is provided in the ceramic fiber tapestry 17 (if only the ceramic fiber tapestry 17 is used, the strength will be insufficient, and the addition of the steel mesh layer 171 can improve the overall strength). As Figure 16 shown, the ceramic fiber tapestry 17 serves as a temporary substitute for the lower skirt cover 4 to isolate the hot air in the furnace. The specific size of the ceramic fiber tapestry 17 only needs to be able to replace the damaged lower skirt cover 4.

[0072] Embodiment 2

[0073] The installation method of the device for temporarily and online repairing the falling skirt cover of the walking beam furnace in Embodiment 1 is as Figures 17-21 shown and includes the following steps:

[0074] When the upper skirt cover 6 and the lower skirt cover 4 of the walking beam furnace are damaged, deformed and fall off, the furnace temperature nearby can be temporarily reduced, and the damaged upper skirt cover 6 and lower skirt cover 4 are removed in sequence. As Figure 17 shown, clean the sundries nearby to expose the working surface of the furnace bottom. Install the flange ring 12 on the walking beam 2 (weld two semi-circular components together to form the flange ring 12). A plurality of support rods 13 are installed at intervals along the circumference of the flange ring 12 (it is also possible to further install a plurality of hinged devices 19 so that each support rod 13 is hinged to the flange ring 12 through the corresponding hinged device 19). A plurality of precast block installation brackets 14 are installed on each support rod 13 in the vertical direction. As Figure 18 shown, then install a plurality of first precast blocks 15 (as Figure 19 shown) and a plurality of second precast blocks 16 (as Figure 20 shown), fill the gaps with refractory mortar, and then install the ceramic fiber tapestry 17 below the flange ring 12 (connect the ceramic fiber tapestry 17 by screwing the bolts in the installation holes 18). As Figure 21 shown, and then the temperature can be raised for production.

[0075] The device for temporarily and online repairing the falling skirt cover of the walking beam furnace is used to temporarily replace the damaged upper skirt cover 6 and lower skirt cover 4, and the corresponding installation positions are the same as those of the original upper skirt cover 6 and lower skirt cover 4.

[0076] The device for temporarily and online repairing the falling skirt cover of the walking beam heating furnace in the present invention can complete the repair and replacement online in a short time, and can timely separate the inside and outside of the furnace to avoid the situation from deteriorating further and causing production stoppage.

[0077] It should be understood that the parts not elaborated in detail in this specification all belong to the prior art.

[0078] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A device for temporarily online repairing the fallen skirt of a walking beam furnace, characterized in that, It includes a flange ring (12), on which a plurality of support rods (13) are circumferentially and spacedly arranged, and a plurality of precast block mounting brackets (14) are arranged on each support rod (13) in the vertical direction; A plurality of first precast blocks (15) are arranged on the flange ring (12), and the plurality of first precast blocks (15) enclose a ring structure adapted to the shape of the flange ring (12); A plurality of second precast blocks (16) are stacked between two adjacent support rods (13), and each second precast block (16) is arranged on the precast block mounting brackets (14) of two adjacent support rods (13). The plurality of second precast blocks (16) on each layer enclose a ring structure adapted to the shape of the flange ring (12); A ceramic fiber blanket (17) is arranged below the flange ring (12).

2. The device for temporarily and online repairing the falling skirt of the walking beam furnace according to claim 1, characterized in that, The gaps of the device for temporarily online repairing the falling skirt of the walking beam furnace are filled with refractory mortar.

3. The device for temporarily and online repairing the falling skirt of the walking beam furnace according to claim 1 or 2, characterized in that, The materials of the first precast block (15) and the second precast block (16) are ceramic fiber.

4. The device for temporarily and online repairing the falling skirt of the walking beam furnace according to claim 1 or 2, characterized in that, The support rod (13) is hinged to the flange ring (12).

5. The device for temporarily and online repairing the falling skirt of the walking beam furnace according to claim 1, characterized in that, The materials of the flange ring (12), the support rod (13) and the precast block mounting bracket (14) are all stainless steel.

6. The device for temporarily and online repairing the falling skirt of the walking beam furnace according to claim 1, wherein, The second precast block (16) is located on the first precast block (15).

7. The device for temporarily and online repairing the falling skirt of the walking beam furnace according to claim 1 or 6, characterized in that, A clamping groove is formed on the outer side of each first precast block (15), and the first precast block (15) is clamped on the flange ring (12) through the clamping groove.

8. The device for temporarily and online repairing the falling skirt of the walking beam furnace according to claim 1, characterized in that, A plurality of mounting holes (18) are circumferentially and spacedly arranged on the flange ring (12), and bolts for threadedly connecting the ceramic fiber blanket (17) are arranged in the mounting holes (18).

9. The device for temporarily online repairing the fallen skirt of the walking beam furnace according to claim 1 or 8, characterized in that, The ceramic fiber blanket (17) is adapted to the shape of the flange ring (12), and a steel mesh layer (171) is arranged in the ceramic fiber blanket (17).

10. The installation method of the device for temporarily and online repairing the falling skirt of the walking beam furnace according to any one of claims 1-9, characterized in that, It includes the following steps: When the upper skirt (6) and the lower skirt (4) of the walking beam furnace are damaged, the damaged upper skirt (6) and lower skirt (4) are removed, the flange ring (12) is installed on the walking beam (2), a plurality of support rods (13) are circumferentially and spacedly installed on the flange ring (12), a plurality of precast block mounting brackets (14) are installed on each support rod (13) in the vertical direction, then a plurality of first precast blocks (15) and a plurality of second precast blocks (16) are installed, the gaps are filled with refractory mortar, and then the ceramic fiber blanket (17) is installed below the flange ring (12).

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