Method for replacing two-point supporting structure at upper part of steelmaking converter

Abstract

The invention relates to a method for replacing two-point supporting structures on the upper portion of a steelmaking converter. The method comprises the steps that S1, a to-be-replaced inclined wedge is dismantled, and an upper supporting adjusting base plate is taken out; s2, measuring the elevation from the arc surface of the seat hole of the trunnion block guide seat of the backing ring to the plate surface of the upper furnace shell support plate, machining a temporary inclined wedge, driving the temporary inclined wedge into the seat hole of the trunnion block guide seat of the backing ring, and measuring the length of the large and small heads of the temporary inclined wedge exposed out of the trunnion block guide seat of the backing ring; s3, a new inclined wedge is machined according to the size and the taper of the machined temporary inclined wedge and the length, exposed out of a backing ring trunnion block guide seat, of a large head and a small head of the temporary inclined wedge, and the upper supporting adjusting base plate is reset; and S4, the plate face of the upper furnace shell supporting plate and the arc face of the backing ring trunnion block guide seat hole are polished, the new inclined wedge is driven and fixed, and it is guaranteed that the contact area between the new inclined wedge and the arc face of the backing ring trunnion block guide seat hole and the contact area between the new inclined wedge and the plate face of the upper furnace shell supporting plate are set values. The replacement method can guarantee the supporting effect on the steelmaking converter.

Description

Technical Field

[0001] The invention relates to the technical field of steel-making converter maintenance, and in particular to a method for replacing a two-point support structure on the upper part of a steel-making converter. Background Art

[0002] The two-point support structure on the steelmaking converter of the steelmaking plant mainly includes an upper two-point support structure and a lower two-point support structure. Figure 1 The upper two-point support structure includes a support ring 1, an upper furnace shell support plate 2, an upper support adjustment pad 3, a butterfly spring assembly 4, an oblique wedge 5, an oblique wedge stopper 6 and a support ring ear shaft block guide seat 7. The upper furnace shell support plate 2 is stacked on the support ring 1, and the support ring ear shaft block guide seat 7 is welded and fixed to the support ring 1 as a whole. The oblique wedge 5 is driven into the seat hole of the support ring ear shaft block guide seat 7 and keeps the large and small head sides exposed to the corresponding length of the support ring ear shaft block guide seat 7, and the large and small head sides of the oblique wedge 5 are respectively abutted against the oblique wedge stopper 6 and the butterfly spring assembly 4, the upper support adjustment pad 3 is located in the vertical gap between the support ring ear shaft block guide seat 7 and the upper furnace shell support plate 2 and fits with the bottom surface of the oblique wedge 5, and the oblique wedge 5 is closely fitted with the arc surface of the seat hole of the support ring ear shaft block guide seat 7 and the plate surface of the upper furnace shell support plate 2, so as to realize stable support of the steelmaking converter.

[0003] With the long-term operation of the steelmaking converter, the inclined wedge 5 gradually produces a gap between the support ring trunnion block guide seat 7 and the upper furnace shell support plate 2 due to wear, which causes the inclined wedge 5 to move in the seat hole of the support ring trunnion block guide seat 7, making the upper two-point support structure of the steelmaking converter no longer reliable. At this time, it is necessary to replace the inclined wedge 5. Since the support ring trunnion block guide seat 7 and the upper furnace shell support plate 2 are both used as reused equipment, both have a certain amount of wear, which causes the original size of the inclined wedge 5 to be no longer applicable. The inclined wedge 5 needs to be remade to ensure that the inclined wedge 5 is reliably connected with the support ring trunnion block guide seat 7 and the upper furnace shell support plate 2 after being driven into the seat hole. Due to the uneven wear of the arc surface of the seat hole of the support ring ear shaft block guide seat 7 and the plate surface of the upper furnace shell support plate 2, it is impossible to accurately determine the processing size of the inclined wedge 5 by measuring the elevation between the arc surface of the seat hole of the support ring ear shaft block guide seat 7 and the plate surface of the upper furnace shell support plate 2; and after the inclined wedge 5 is driven into the seat hole of the support ring ear shaft block guide seat 7, the inclined wedge 5 often cannot fully contact the arc surface of the support ring ear shaft block guide seat 7 and the plate surface of the upper furnace shell support plate 2, thereby failing to solve the problem of the movement of the inclined wedge 5. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method for replacing the two-point support structure on the upper part of a steel-making converter, which can ensure the supporting effect of the steel-making converter.

[0005] The present invention adopts the following technical solution:

[0006] The present invention provides a method for replacing a two-point support structure on the upper part of a steelmaking converter, comprising the following steps:

[0007] S1: Remove the inclined wedge to be replaced on the upper two-point support structure, and take out the upper support adjustment pad from the vertical gap between the support ring trunnion block guide seat and the upper furnace shell support plate;

[0008] S2: Measure the elevation from the arc surface of the seat hole of the support ring trunnion block guide seat to the plate surface of the upper furnace shell support plate, thereby processing a temporary bevel, driving the temporary bevel into the seat hole of the support ring trunnion block guide seat, and measuring the length of the temporary bevel head exposed from the support ring trunnion block guide seat;

[0009] S3: According to the height dimension and taper of the temporary bevel wedge reducer after processing, a new bevel wedge is processed in combination with the measured length of the temporary bevel wedge reducer protruding from the guide seat of the support ring trunnion block, and the upper support adjustment pad is reset in the vertical gap between the guide seat of the support ring trunnion block and the upper furnace shell support plate;

[0010] S4: Grind the plate surface of the upper furnace shell support plate and the arc surface of the seat hole of the support ring trunnion block guide seat, drive a new bevel into the seat hole of the support ring trunnion block guide seat and fix it, and ensure that the contact area between the new bevel and the arc surface of the seat hole of the support ring trunnion block guide seat and the plate surface of the upper furnace shell support plate is the set value.

[0011] Preferably, the temporary bevel wedge processed in step S2 is provided with threaded holes on both end faces, and shackles are screwed into the threaded holes.

[0012] Preferably, the temporary bevel wedge processed in step S2 is provided with a plurality of weight-reducing holes, and the temporary bevel wedge is shorter in length than the bevel wedge to be replaced, and a grinding allowance of more than 20 mm is reserved in the height direction.

[0013] Preferably, the new bevel wedge processed in step S3 has a reserved grinding allowance of more than 20 mm in the height direction.

[0014] Preferably, a processing allowance is reserved for the upper support adjustment plate. In step S3, the installation clearance of the upper support adjustment plate is first measured, and then the thickness of the upper support adjustment plate is adjusted according to the measured clearance size, and then the upper support adjustment plate is reset in the vertical clearance between the support ring ear shaft block guide seat and the upper furnace shell support plate.

[0015] Preferably, step S3 comprises:

[0016] S31: according to the height dimension and taper of the temporary bevel reducer after processing and the measured length of the temporary bevel reducer protruding from the guide seat of the support ring trunnion block, the precise elevation from the arc surface of the seat hole of the support ring trunnion block guide seat to the plate surface of the upper furnace shell support plate is obtained;

[0017] S32: Determine the length of the reducer protruding from the guide seat of the trunnion ring and the new wedge after grinding according to the specified length of the reducer protruding from the guide seat of the trunnion ring and the feed amount of the new wedge after grinding, thereby determining the height of the reducer of the new wedge and processing the new wedge;

[0018] S33: Re-set the upper support adjustment pad in the vertical gap between the support ring ear shaft block guide seat and the upper furnace shell support plate.

[0019] Preferably, in step S4, the contact area between the new bevel and the arc surface of the guide seat hole of the trunnion ring trunnion block is set to 80% of the arc surface of the guide seat hole of the trunnion ring trunnion block in contact with the new bevel.

[0020] Preferably, in step S4, the contact area between the new inclined wedge and the plate surface of the upper furnace shell support plate is set to 80% of the bottom surface of the new inclined wedge in contact with the plate surface of the upper furnace shell support plate.

[0021] Preferably, step S4 comprises:

[0022] S41: applying colorant on the plate surface of the upper furnace shell support plate and the arc surface of the seat hole of the support ring trunnion block guide seat, driving a new bevel into the seat hole of the support ring trunnion block guide seat and taking it out, and checking the coloring of the plate surface of the upper furnace shell support plate and the arc surface of the seat hole of the support ring trunnion block guide seat;

[0023] S42: grinding the portion where the colorant is removed from the plate surface of the upper furnace shell support plate and the arc surface of the guide seat hole of the support ring trunnion block, and re-applying the colorant;

[0024] S43: repeating steps S41-S42 until it is found that the contact areas between the new bevel and the plate surface of the upper furnace shell support plate and the arc surface of the guide seat hole of the support ring trunnion block are all set values;

[0025] S44: Drive the new wedge into the seat hole of the support ring trunnion block guide seat again and secure it.

[0026] Preferably, the colorant used in step S41 is red lead powder.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The method for replacing the upper two-point support structure of a steelmaking converter of the present invention can calculate and determine the precise elevation from the arc surface of the seat hole of the support ring ear shaft block guide seat to the plate surface of the upper furnace shell support plate by setting a temporary bevel, according to the actual size of the temporary bevel head and the measured length of the temporary bevel head exposed from the support ring ear shaft block guide seat, and thus process a new bevel that can adapt to the seat hole of the support ring ear shaft block guide seat, and grind the plate surface of the upper furnace shell support plate and the arc surface of the seat hole of the support ring ear shaft block guide seat, so that after the new bevel is assembled in the seat hole of the support ring ear shaft block, it can fully contact the arc surface of the support ring ear shaft block guide seat and the plate surface of the upper furnace shell support plate, thereby ensuring the supporting effect on the steelmaking converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an upper two-point support structure in the prior art.

[0030] Figure 2 It is a main schematic view of a temporary inclined wedge in a method for replacing a two-point supporting structure on the upper part of a steelmaking converter according to an embodiment of the present invention.

[0031] Figure 3 It is a left-side schematic diagram of a temporary inclined wedge in a method for replacing a two-point supporting structure on the upper part of a steelmaking converter according to an embodiment of the present invention.

[0032] Figure 4 It is a right view schematic diagram of a temporary inclined wedge in a method for replacing a two-point support structure on the upper part of a steelmaking converter in an embodiment of the present invention.

[0033] Figure 5 It is a front view schematic diagram of a new inclined wedge in a method for replacing a two-point support structure on the upper part of a steelmaking converter in an embodiment of the present invention.

[0034] Figure 6 It is a left view schematic diagram of a new inclined wedge in a method for replacing a two-point support structure on the upper part of a steelmaking converter in an embodiment of the present invention.

[0035] Figure 7 It is a right view schematic diagram of a new inclined wedge in a method for replacing a two-point support structure on the upper part of a steelmaking converter in an embodiment of the present invention.

[0036] Figure 8 It is a schematic diagram of a method for replacing the upper two-point support structure of a steelmaking converter in an embodiment of the present invention, after a temporary oblique wedge is driven into a guide seat of a support ring ear shaft block.

[0037] Fig. 9 It is a schematic diagram of a method for replacing the upper two-point support structure of a steelmaking converter in an embodiment of the present invention, after a new inclined wedge is driven into a guide seat of a support ring ear shaft block.

[0038] Fig.10It is a schematic front view of an upper support adjustment pad in a method for replacing a two-point support structure on the upper part of a steelmaking converter in an embodiment of the present invention.

[0039] Fig.11 It is a top view schematic diagram of an upper support adjustment pad in a method for replacing a two-point support structure on the upper part of a steelmaking converter in an embodiment of the present invention.

[0040] Fig.12 It is a left schematic diagram of an upper support adjustment pad in a method for replacing a two-point support structure on the upper part of a steelmaking converter in an embodiment of the present invention.

[0041] The reference numerals are described as follows:

[0042] 1. Support ring 6, oblique wedge stopper

[0043] 2. Upper furnace shell support plate 7. Support ring trunnion block guide seat

[0044] 3. Upper support adjustment pad 8. Temporary inclined wedge

[0045] 4.Butterfly spring assembly 81.Weight reduction hole

[0046] 5. Oblique wedge DETAILED DESCRIPTION

[0047] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0048] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0051] Combination Figures 1 to 7 The method for replacing the two-point support structure on the upper part of the steelmaking converter of this embodiment comprises the following steps:

[0052] S1: Remove the inclined wedge 5 to be replaced on the upper two-point support structure, and take out the upper support adjustment pad 2 from the vertical gap between the support ring trunnion block guide seat 7 and the upper furnace shell support plate 2;

[0053] S2: Measure the elevation from the arc surface of the seat hole of the support ring trunnion block guide seat 7 to the plate surface of the upper furnace shell support plate 2, thereby processing a temporary bevel 8, driving the temporary bevel 8 into the seat hole of the support ring trunnion block guide seat 7, and measuring the length of the reducer of the temporary bevel 8 protruding from the support ring trunnion block guide seat 7;

[0054] S3: According to the height dimension and taper of the temporary bevel wedge 8 after processing, a new bevel wedge 5 is processed in combination with the measured length of the temporary bevel wedge 8 that protrudes from the support ring trunnion block guide seat 7, and the upper support adjustment pad 3 is reset in the vertical gap between the support ring trunnion block guide seat 7 and the upper furnace shell support plate 2;

[0055] S4: Grind the plate surface of the upper furnace shell support plate 2 and the arc surface of the seat hole of the support ring ear shaft block guide seat 7, drive a new bevel 5 into the seat hole of the support ring ear shaft block guide seat 7 and fix it, and ensure that the contact area between the new bevel 5 and the arc surface of the seat hole of the support ring ear shaft block guide seat 7 and the plate surface of the upper furnace shell support plate 2 is the set value.

[0056] The replacement method of the upper two-point support structure of the steel-making converter of this embodiment is to set a temporary bevel 8, and can calculate and determine the precise elevation from the arc surface of the seat hole of the support ring ear shaft block guide seat 7 to the plate surface of the upper furnace shell support plate 2 according to the actual size of the size head of the temporary bevel 8 and the measured length of the size head of the temporary bevel 8 exposed from the support ring ear shaft block guide seat 7, and thus process a new bevel 5 that can adapt to the seat hole of the support ring ear shaft block guide seat 7, and by grinding the plate surface of the upper furnace shell support plate 2 and the arc surface of the seat hole of the support ring ear shaft block guide seat 7, the new bevel 5 can be fully in contact with the arc surface of the support ring ear shaft block guide seat 7 and the plate surface of the upper furnace shell support plate 2 after being assembled into the seat hole of the support ring ear shaft block guide seat 7, thereby ensuring the supporting effect on the steel-making converter.

[0057] It should be noted that the taper of the bevel 5 is the same as the taper of the seat hole of the support ring ear shaft block guide seat 7, and the taper value is a known fixed value. In order to meet the requirements that after the bevel 5 is installed, the lateral ends of the bevel 5 can respectively abut against the bevel stop block 6 and the butterfly spring assembly 4, the length of the large and small heads of the bevel 5 exposed from the support ring ear shaft block guide seat 7 is also a known fixed value. Therefore, in step S3, the precise elevation from the arc surface of the seat hole of the support ring ear shaft block guide seat 7 to the plate surface of the upper furnace shell support plate 2 is calculated to machine a new bevel 5 that can adapt to the seat hole of the support ring ear shaft block guide seat 7.

[0058] Preferably, combined Figure 1 In this embodiment, when removing the bevel wedge 5 to be replaced on the upper two-point support structure in step S1, the butterfly spring assembly 4 is first removed, and then the bevel wedge stopper 6 is cut off, and then a lifting frame is set above the bevel wedge 5 to be replaced to facilitate the reverse transportation of the bevel wedge 5 and the swing hammer.

[0059] Specifically, in this embodiment, when the bevel wedge 5 is removed, it is pushed out by a jack; if the jack does not work, a traveling hammer is used to knock and remove it; if the traveling hammer also does not work, gas cutting is used to destructively remove the bevel wedge 5.

[0060] The specific gas cutting method is: first cut off the protruding parts at both ends of the bevel wedge 5, then cut both sides at the same time, and pay attention not to accidentally damage the support ring ear shaft block guide seat 7. After the disassembly of the bevel wedge 5 is completed, it is lifted out in blocks through the lifting frame.

[0061] Preferably, in this embodiment, the height of the corresponding position of the temporary bevel 8 is lower than the elevation from the arc surface of the seat hole of the support ring ear shaft block guide seat 7 to the plate surface of the upper furnace shell support plate 2, so as to facilitate the installation of the temporary bevel 8 into the seat hole of the support ring ear shaft block guide seat 7.

[0062] Specifically, the height of the corresponding position of the temporary bevel 8 is 1 mm-2 mm lower than the elevation from the arc surface of the seat hole of the support ring trunnion block guide seat 7 to the plate surface of the upper furnace shell support plate 2.

[0063] Preferably, in this embodiment, after the temporary bevel 8 is driven into the seat hole of the support ring ear shaft block guide seat 7, the large end side of the temporary bevel 8 is pressed toward the small end side by a jack to ensure the accuracy of the length value of the large and small ends of the temporary bevel 8 exposed from the support ring ear shaft block guide seat 7.

[0064] Preferably, see Figures 2 to 4 The temporary bevel wedge 8 processed in step S2 is provided with threaded holes at both end surfaces, and shackles are screwed into the threaded holes to hang a wire rope and disassemble and assemble the temporary bevel wedge 8.

[0065] Likewise, see Figures 5 to 7 The new bevel wedge 5 is also provided with a threaded hole for screwing the shackle.

[0066] Preferably, see Figure 2 , the temporary bevel 8 processed in step S2 is provided with a plurality of weight-reducing holes 81, and the temporary bevel 8 is shorter in length than the bevel 5 to be replaced, and a grinding amount of more than 20 mm is reserved in the height direction. Since the temporary bevel 8 is only used as an auxiliary tool, a plurality of weight-reducing holes 81 are opened on the temporary bevel 8, and the size is reduced in the length direction to reduce the weight, facilitate transportation and hoisting, and improve labor efficiency. In addition, since there is a certain amount of wear on the arc surface of the support ring ear shaft guide seat 7 and the upper furnace shell support plate 2, the elevation between the two increases compared to the design value. If the temporary bevel 8 is manufactured according to the design elevation value, the height may not be enough and it will completely jump out of the seat hole of the support ring ear shaft block guide seat 7. Therefore, it is necessary to reserve a grinding amount of more than 20 mm in the height direction for the temporary bevel 8.

[0067] Preferably, in this embodiment, the length of the temporary bevel 8 is less than 400 mm of the standard bevel, so as to further reduce the weight without affecting the auxiliary functions, facilitate transportation and installation, and improve labor efficiency.

[0068] Preferably, the new bevel 5 processed in step S3 has a reserved grinding allowance of more than 20 mm in the height direction to ensure that after the plate surface of the upper furnace shell support plate 2 and the arc surface of the seat hole of the support ring ear shaft block guide seat 7 are polished, the new bevel 5 can fully contact the arc surface of the support ring ear shaft block guide seat 7 and the plate surface of the upper furnace shell support plate 2 when the length of the large and small heads exposed from the support ring ear shaft block guide seat 7 meets the requirements.

[0069] Preferably, see Figures 10 to 12 , and combined with Figure 1 The upper support adjustment pad 3 has a reserved processing allowance. In step S3, the installation gap of the upper support adjustment pad 3 is first measured, and then the thickness of the upper support adjustment pad 3 is adjusted according to the measured gap size to make the subsequent installation more convenient, and then the upper support adjustment pad 3 is reset in the vertical gap between the support ring ear shaft block guide seat 7 and the upper furnace shell support plate 2.

[0070] Preferably, in the present embodiment, the upper support adjustment pad 3 has a taper of 1:150, and the taper surface of the upper support adjustment pad 3 fits the inner wall of the gap hole of the upper furnace shell support plate 2 .

[0071] Preferably, step S3 comprises:

[0072] S31: according to the height dimension and taper of the temporary bevel wedge 8 after processing and the measured length of the temporary bevel wedge 8 protruding from the support ring trunnion block guide seat 7, the precise elevation from the arc surface of the seat hole of the support ring trunnion block guide seat 7 to the plate surface of the upper furnace shell support plate 2 is obtained;

[0073] S32: Determine the length of the reducer of the new bevel wedge 5 protruding from the support ring trunnion block guide seat 7 according to the specified length of the reducer protruding from the support ring trunnion block guide seat 7 minus the new bevel wedge feed amount after grinding, thereby determining the height of the reducer of the new bevel wedge 5, and processing the new bevel wedge 5;

[0074] S33: re-set the upper support adjustment pad 3 in the vertical gap between the support ring ear shaft block guide seat 7 and the upper furnace shell support plate 2.

[0075] Specifically, see Figure 8 and Fig. 9 , taking the support ring trunnion block guide seat 7 with a seat hole taper of 1:50 and a length of 800mm as an example, after the temporary bevel 8 is driven into the seat hole of the support ring trunnion block guide seat 7, when A and B are both known quantities, C=B+A*1:50, D=C-250*1:50, where A is the length of the small head of the temporary bevel 8 exposed from the support ring trunnion block guide seat 7, B is the height of the end of the small head of the temporary bevel 8, and C is the height of the small head of the temporary bevel 8. The precise elevation of the arc surface of the seat hole of seat 7 to the plate surface of the upper furnace shell support plate 2, D is the end height of the new small head of the bevel 5, and in the formula D=C-250*1:50, 250 is the specific length value of the new small head of the bevel 5 exposed from the support ring ear shaft block guide seat 7, that is, the length value of the new small head of the bevel 5 exposed from the support ring ear shaft block guide seat is obtained by deducting the new bevel feed amount after grinding from the specified value of the length of the new small head of the bevel 5 exposed from the support ring ear shaft block guide seat.

[0076] Similarly, the height of the big head of the new bevel wedge 5 can also be obtained in the same way, and then a new bevel wedge 5 that can adapt to the seat hole of the support ring trunnion block guide seat 7 can be processed.

[0077] Preferably, in step S4, the contact area setting value between the new bevel 5 and the arc surface of the seat hole of the support ring ear shaft block guide seat 7 is 80% of the arc surface of the seat hole of the support ring ear shaft block guide seat 7 in contact with the new bevel 5 to ensure the contact effect between the new bevel 5 and the arc surface of the seat hole of the support ring ear shaft block guide seat 7.

[0078] Preferably, in step S4, the contact area setting value between the new bevel 5 and the plate surface of the upper furnace shell support plate 2 is 80% of the bottom surface of the new bevel 5 in contact with the plate surface of the upper furnace shell support plate 2 to ensure the contact effect between the new bevel 5 and the plate surface of the upper furnace shell support plate 2.

[0079] Preferably, step S4 comprises:

[0080] S41: applying colorant on the plate surface of the upper furnace shell support plate 2 and the arc surface of the seat hole of the support ring trunnion block guide seat 7, driving a new bevel 5 into the seat hole of the support ring trunnion block guide seat 7 and taking it out, and checking the coloring of the plate surface of the upper furnace shell support plate 2 and the arc surface of the seat hole of the support ring trunnion block guide seat 7;

[0081] S42: grinding the portion where the colorant is removed from the plate surface of the upper furnace shell support plate 2 and the arc surface of the seat hole of the support ring trunnion block guide seat 7, and re-applying the colorant;

[0082] S43: repeating steps S41-S42 until it is found that the contact areas between the new inclined wedge 5 and the plate surface of the upper furnace shell support plate 2 and the arc surface of the seat hole of the support ring trunnion block guide seat 7 are all set values;

[0083] S44: Drive the new bevel wedge 5 into the seat hole of the support ring trunnion block guide seat 7 again and fix it.

[0084] Preferably, the colorant used in step S41 is red lead powder.

[0085] The replacement method of the upper two-point support structure of the steel-making converter of this embodiment solves the problem of difficulty in measuring the spatial matching dimensions between the support ring ear shaft block guide seat 7 and the upper surface of the upper furnace shell support plate 2, ensures the installation accuracy of the inclined wedge of the upper two-point support structure, and enables the upper two-point support structure of the steel-making converter to stably support the steel-making converter.

[0086] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A method for replacing a two-point support structure on the upper part of a steelmaking converter, characterized in that: The following steps are involved: S1: Remove the inclined wedge (5) to be replaced on the upper two-point support structure, and take out the upper support adjustment pad (3) from the vertical gap between the support ring trunnion block guide seat (7) and the upper furnace shell support plate (2); S2: measuring the elevation from the arc surface of the seat hole of the support ring trunnion block guide seat (7) to the plate surface of the upper furnace shell support plate (2), thereby processing a temporary bevel (8), driving the temporary bevel (8) into the seat hole of the support ring trunnion block guide seat (7), and measuring the length of the reducer and reducer of the temporary bevel (8) protruding from the support ring trunnion block guide seat (7); S3: processing a new bevel (5) according to the height dimension and taper of the temporary bevel (8) reducer after processing and the measured length of the temporary bevel (8) reducer protruding from the support ring trunnion block guide seat (7), and resetting the upper support adjustment pad (3) in the vertical gap between the support ring trunnion block guide seat (7) and the upper furnace shell support plate (2); S4: The plate surface of the upper furnace shell support plate (2) and the arc surface of the seat hole of the support ring ear shaft block guide seat (7) are polished, and a new bevel (5) is driven into the seat hole of the support ring ear shaft block guide seat (7) and fixed, and it is ensured that the contact area between the new bevel (5) and the arc surface of the seat hole of the support ring ear shaft block guide seat (7) and the plate surface of the upper furnace shell support plate (2) is the set value.

2. The method for replacing the upper two-point support structure of a steelmaking converter according to claim 1, characterized in that: step The temporary bevel wedge (8) processed in S2 is provided with threaded holes at both end surfaces, and shackles are screwed into the threaded holes.

3. The method for replacing the upper two-point support structure of a steelmaking converter according to claim 1, characterized in that: The temporary bevel wedge (8) processed in step S2 is provided with a plurality of weight-reducing holes (81), and the temporary bevel wedge (8) is shorter in length than the bevel wedge (5) to be replaced, and a grinding allowance of more than 20 mm is reserved in the height direction.

4. The method for replacing the upper two-point support structure of a steelmaking converter according to claim 1, characterized in that: The new bevel wedge (5) processed in step S3 has a reserved grinding allowance of more than 20 mm in the height direction.

5. The method for replacing the upper two-point support structure of a steelmaking converter according to claim 1, wherein the upper support adjustment pad (3) has a reserved machining allowance, characterized in that: In step S3, the installation gap of the upper support adjustment pad (3) is first measured, and then the thickness of the upper support adjustment pad (3) is adjusted according to the measured gap size, and then the upper support adjustment pad (3) is reset in the vertical gap between the support ring ear shaft block guide seat (7) and the upper furnace shell support plate (2).

6. The method for replacing the upper two-point support structure of a steelmaking converter according to claim 1, characterized in that: Step S3 includes: S31: Based on the height dimension and taper of the temporary bevel wedge (8) reducer after processing and the measured length of the temporary bevel wedge (8) reducer protruding from the support ring trunnion block guide seat (7), the precise elevation from the arc surface of the seat hole of the support ring trunnion block guide seat (7) to the plate surface of the upper furnace shell support plate (2) is obtained; S32: Determine the length of the reducer of the new oblique wedge (5) protruding from the support ring trunnion block guide seat (7) based on the specified length of the reducer protruding from the support ring trunnion block guide seat (7) minus the new oblique wedge feed amount after grinding, thereby determining the height of the reducer of the new oblique wedge (5), and processing the new oblique wedge (5); S33: re-setting the upper support adjustment pad (3) in the vertical gap between the support ring ear shaft block guide seat (7) and the upper furnace shell support plate (2).

7. The method for replacing the upper two-point support structure of a steelmaking converter according to claim 1, characterized in that: In step S4, the contact area between the new bevel (5) and the arc surface of the seat hole of the support ring trunnion block guide seat (7) is set to 80% of the arc surface of the seat hole of the support ring trunnion block guide seat (7) in contact with the new bevel (5).

8. The method for replacing the upper two-point support structure of a steelmaking converter according to claim 1, characterized in that: In step S4, the contact area between the new bevel (5) and the plate surface of the upper furnace shell support plate (2) is set to 80% of the bottom surface of the new bevel (5) in contact with the plate surface of the upper furnace shell support plate (2).

9. The method for replacing the upper two-point support structure of a steelmaking converter according to claim 1, characterized in that: Step S4 includes: S41: applying a colorant on the plate surface of the upper furnace shell support plate (2) and the arc surface of the seat hole of the support ring trunnion block guide seat (7), driving a new bevel (5) into the seat hole of the support ring trunnion block guide seat (7) and removing it, and checking the coloring of the plate surface of the upper furnace shell support plate (2) and the arc surface of the seat hole of the support ring trunnion block guide seat (7); S42: grinding the plate surface of the upper furnace shell support plate (2) and the arc surface of the seat hole of the support ring trunnion block guide seat (7) where the colorant has been removed, and re-applying the colorant; S43: repeating steps S41-S42 until it is found that the contact areas between the new bevel (5) and the plate surface of the upper furnace shell support plate (2) and the arc surface of the seat hole of the support ring trunnion block guide seat (7) are all set values; S44: Drive a new bevel wedge (5) into the seat hole of the support ring trunnion block guide seat (7) again and fix it.

10. The method for replacing the upper two-point support structure of a steelmaking converter according to claim 9, characterized in that: The colorant used in step S41 is red lead powder.

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