Blast furnace bottom flat steel mounting and adjusting structure

Abstract

The utility model belongs to the technical field of blast furnace bottom flat steel installation, and particularly relates to a blast furnace bottom flat steel installation adjusting structure which is characterized by comprising a vertical frame, flat steel, a first gasket, a second gasket and a bolt, a vertical notch is formed in the top end of the vertical frame, and a horizontal long hole is formed in the flat steel. The first gasket, the vertical frames, the flat steel and the second gasket are sequentially stacked and then connected into a whole through bolts and nuts, the bottom ends of the vertical frames are connected with a bottom plate of the blast furnace through full welding, the vertical frames are arranged on the bottom plate of the blast furnace in an array mode, the transverse distance between every two adjacent vertical frames is 0.6-0.8 m, and the longitudinal distance between every two adjacent vertical frames is 0.8-1.2 m. The utility model has the beneficial effects that by adopting the adjustable vertical frame structure, the installation requirement of elevation precision of the lower surface of the first layer of fully paved carbon bricks at the furnace bottom can be completely met, the flat steel can still be adjusted after rough alignment, the height of the flat steel at the furnace bottom of the blast furnace can be quickly and finely aligned, and the production efficiency is improved. And the construction standard of imported carbon bricks is met, and the installation effect of shortening the construction period is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of blast furnace bottom flat steel installation, in particular to a blast furnace bottom flat steel installation and adjustment structure. Background Art

[0002] The blast furnace bottom is subjected to high temperatures of 1400-4600℃ when the furnace is working, and its hardness determines the service life of the furnace. The lining structures used in the blast furnace bottom and furnace hearth at home and abroad can be roughly divided into two categories: one is the full carbon brick structure, and the other is the structure combined with carbon bricks and ceramic materials. From the perspective of heat transfer, the full carbon brick bottom structure is a completely heat-conductive type, usually called a heat-dissipating structure; while the bottom structure combined with carbon bricks and ceramic materials is a combination of heat insulation and heat conduction, usually called a heat-insulating structure. The high temperature, mechanical and chemical erosion to which the blast furnace bottom masonry is subjected and the degree of erosion determines the life of the blast furnace. Only when the surface temperature of the masonry is reduced to the solidification temperature of the slag iron it contacts, and a slag skin (or iron shell) is generated on the surface, can it be prevented from being further eroded, so the furnace bottom must be cooled. When laying carbon bricks, the horizontal accuracy of the blast furnace bottom is quite high. It is of utmost importance to quickly and accurately align the surface accuracy of the first layer of carbon bricks on the bottom of the furnace.

[0003] When installing blast furnace flat steel, fixed vertical frames are mostly used. After rough alignment, spot welding of the flat steel and the fixed vertical frames is carried out. When fine alignment is performed for overall adjustment, the problematic positions need to be cut open with an angle grinder to re-adjust the spot welding positions. The construction is cumbersome, and the upper surface of the flat steel is prone to deformation during multiple welding, which affects the installation accuracy. Utility Model Content

[0004] The purpose of the utility model is to provide a blast furnace bottom flat steel installation and adjustment structure, which overcomes the shortcomings of the prior art and adopts an adjustable frame structure to meet the requirements of the elevation accuracy of the lower surface of the first layer of fully paved carbon bricks on the furnace bottom. Adjustment can still be made after rough alignment without cutting the welding points, thereby achieving fast and accurate installation of the blast furnace bottom flat steel.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A blast furnace bottom flat steel installation and adjustment structure, characterized in that it includes a vertical frame, flat steel, gasket one, gasket two and bolts, the top of the vertical frame is provided with a notch in the vertical direction, the flat steel is provided with a long hole in the horizontal direction, gasket one and the vertical frame, flat steel, gasket two are stacked in sequence and connected into one by bolts and nuts, the bottom end of the vertical frame is connected to the blast furnace bottom plate by full welding, the vertical frames are arranged in an array on the blast furnace bottom plate, and the lateral spacing between adjacent vertical frames is 0.6-0.8 meters, and the longitudinal spacing is 0.8-1.2 meters.

[0007] Furthermore, both gasket 1 and gasket 2 are square plain carbon steel gaskets with a thickness of 8-10 mm.

[0008] Furthermore, the flat steel is made of a plain carbon steel plate with a thickness of 8-10 mm, and the parallelism error of the upper side thereof is not greater than 0.3 mm.

[0009] Furthermore, the stand is made of ∠75×5mm ordinary carbon steel angle steel, with a notch depth of 20-30mm and a width of 15-22mm.

[0010] Furthermore, the upper surface of the flat steel is consistent with the elevation of the lower surface of the first layer of carbon bricks fully laid on the furnace bottom.

[0011] Furthermore, the length of the long hole is 30-50 mm, the width is 15-22 mm, and there are 3-5 long holes distributed on each meter of the flat steel.

[0012] Furthermore, the bolts and nuts are both made of ordinary carbon steel.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1) By adopting an adjustable frame structure, the installation requirements for the elevation accuracy of the lower surface of the first layer of carbon bricks at the furnace bottom can be fully met. The flat steel can still be adjusted after rough alignment, which is conducive to the rapid and accurate installation of the flat steel at the bottom of the blast furnace and improves the installation efficiency.

[0015] 2) When adjusting the flat steel, there is no need to cut the previous connection welding points of the flat steel. You only need to adjust the height of the bolts and gaskets to quickly and accurately align the height of the flat steel, achieving the installation effect of imported carbon brick masonry standards and shortening the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure between the vertical frame and the flat steel in the embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the gasket structure in an embodiment of the utility model.

[0019] Figure 4 Schematic diagram of the stand structure in the embodiment of the utility model

[0020] Figure 5 Schematic diagram of the flat steel structure in the embodiment of the utility model

[0021] Figure 6 This is a rendering of the effect after the implementation of the embodiment of the utility model;

[0022] Figure 7 This is a schematic diagram of the first layer of fully paved carbon bricks in the embodiment of the utility model;

[0023] Figure 8 This is a schematic diagram of the welding of furnace bottom flat steel in an embodiment of the utility model.

[0024] In the figure: 1- blast furnace bottom plate; 2- stand; 3- flat steel; 4- gasket 1; 5- bolt; 6- nut; 7- gasket 2; 8- positioning welding point; 9- notch; 10- long hole. DETAILED DESCRIPTION

[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the specific embodiments required to be used in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the utility model. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0027] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the utility model claimed, but only represents the selected embodiments of the utility model.

[0028] See Figure 1-6 , is a schematic structural diagram of an embodiment of a blast furnace bottom flat steel installation and adjustment structure of the utility model, comprising a stand 2, flat steel 3, gasket 1 4, gasket 2 7 and bolt 5, the top of the stand 2 is provided with a vertical notch 9, the flat steel 3 is provided with a horizontal long hole 10, the gasket 1 4 and the stand 2, flat steel 3, gasket 2 7 are stacked in sequence and connected into one by bolts 5 and nuts 6, the bottom end of the stand 2 is connected to the furnace bottom plate 1 by full welding, the stands are arranged in an array on the blast furnace bottom plate, and the lateral distance between adjacent stands is 0.6-0.8 meters, and the longitudinal distance is 0.8-1.2 meters.

[0029] In the embodiment, both gasket 1 4 and gasket 2 7 are square plain carbon steel gaskets with a thickness of 8 mm. The stand 2 is made of ∠75×5mm plain carbon steel angle steel, and the notch 9 has a depth of 20-30 mm and a width of 15-22 mm. The length of the long hole 10 is 30-50 mm and the width is 15-22 mm. There are 3-5 long holes 10 distributed on each meter of the flat steel 3. The bolts 5 and nuts 6 are both made of ordinary carbon steel. The flat steel 3 is made of plain carbon steel plate with a thickness of 8-10 mm, and the parallelism error of the upper side is not more than 0.3 mm. The upper surface of the flat steel 3 is consistent with the elevation of the lower surface of the first layer of carbon bricks on the bottom of the furnace. The notch 9 can realize the adjustment of the height of the flat steel; the long hole 10 can realize the lateral adjustment of the flat steel; the upper surface elevation of the flat steel 3 is adjusted longitudinally and transversely through the long holes on the stand 2 and the flat steel 3.

[0030] When installing the flat steel, follow the center line of the first layer of carbon brick masonry (taking the center line of carbon brick masonry 30°-210°, 120°-300° as an example, Figure 7 As shown), the center line of the flat steel and the center line of the carbon brick form an angle of 30-60° (taking the angle of 30° between the flat steel and the carbon brick masonry center line as an example, the flat steel welding center line is 60°-240°, 150°-330°, Figure 8 As shown in the figure, evenly distribute the wires along the center line of the flat steel on the blast furnace floor, weld the vertical frames, and the angle steels on the vertical frames should be in the same direction. The horizontal spacing of the vertical frames is 0.6-0.8 meters, and the vertical spacing is 0.8-1.2 meters. Set up a level in the center of the blast furnace floor, use the level ruler to take the average of the center elevations of each iron mouth of the blast furnace and lead it to the upper surface of the flat steel. First, perform rough alignment, that is, after the upper surface accuracy of each flat steel meets the requirements, tighten the bolts. After the rough alignment is completed, use a 3-meter cast iron level and a 0.3mm feeler gauge to check each point on the contact surface of the cast iron level and the flat steel. If there are unqualified points, adjust the bolts and move the height of the flat steel up or down to meet the accuracy requirements. If there is no deviation, make positioning welding points 8 at various locations, intermittently weld the sides of each gasket and adjacent parts, and fully weld the lower part of the flat steel 3 in contact with the support frame 2 to ensure that the flat steel does not sink during the subsequent masonry process, and finally achieve the imported carbon brick masonry standard and shorten the construction period.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blast furnace bottom flat steel installation and adjustment structure, characterized in that: It includes a vertical frame, flat steel, gasket one, gasket two and bolts. The top of the vertical frame is provided with a vertical notch, and the flat steel is provided with a horizontal long hole. Gasket one and the vertical frame, flat steel and gasket two are stacked in sequence and connected into one through bolts and nuts. The bottom end of the vertical frame is connected to the blast furnace floor by full welding. The vertical frames are arranged in an array on the blast furnace floor. The horizontal distance between adjacent vertical frames is 0.6-0.8 meters, and the vertical distance is 0.8-1.2 meters.

2. The blast furnace bottom flat steel installation and adjustment structure according to claim 1 is characterized in that: The gasket 1 and the gasket 2 are both square plain carbon steel gaskets with a thickness of 8-10 mm.

3. The blast furnace bottom flat steel installation and adjustment structure according to claim 1 is characterized in that: The flat steel is made of a plain carbon steel plate with a thickness of 8-10 mm, and the parallelism error of the upper side thereof is no more than 0.3 mm.

4. The blast furnace bottom flat steel installation and adjustment structure according to claim 1 is characterized in that: The stand is made of ∠75×5mm ordinary carbon steel angle steel, with a notch depth of 20-30mm and a width of 15-22mm.

5. The blast furnace bottom flat steel installation and adjustment structure according to claim 1, characterized in that: The upper surface of the flat steel is consistent with the elevation of the lower surface of the first layer of carbon bricks fully laid on the furnace bottom.

6. The blast furnace bottom flat steel installation and adjustment structure according to claim 1, characterized in that: The length of the long hole is 30-50 mm, the width is 15-22 mm, and 3-5 long holes are distributed on each meter of the flat steel.

7. The blast furnace bottom flat steel installation and adjustment structure according to claim 1, characterized in that: The bolts and nuts are both made of ordinary carbon steel.

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