Blast furnace hot blast furnace shell assembly device and construction method thereof

Abstract

This invention relates to a blast furnace hot blast stove shell assembly device, comprising a platform base, with each arc-shaped shell plate disposed on the outer edge of the platform base. Each arc-shaped shell plate has a shell locator on its inner side, and the shell locator includes several fixing devices, fixed to an upper slot fixed to the upper edge of the shell plate and a lower slot fixed to the lower edge of the shell plate. An oblique telescopic bolt is connected to the inner side of the upper slot; a horizontal telescopic screw is connected to the inner side of the lower slot; the other ends of the oblique and horizontal telescopic screws are connected to the fixing devices. The invention also provides a construction method for assembling the blast furnace hot blast stove shell using the above-mentioned blast furnace hot blast stove shell assembly device. The fixing devices are fixed to the platform base, the shell plates are placed on the platform base according to the positioning lines, the shell locators are installed, and the lengths of the horizontal and oblique telescopic screws are adjusted to support the lower and upper openings of the shell to the radius required by the drawings. This invention facilitates adjustment of the shell roundness, allows for rapid alignment of each arc-shaped shell plate, and does not damage the shell base material.

Description

Technical Field

[0001] This invention belongs to the field of hot blast stove construction technology, specifically a blast furnace hot blast stove shell assembly device and its construction method. Background Technology

[0002] With the development of my country's metallurgical industry, the volume and number of blast furnaces and hot blast stoves in ironmaking are constantly increasing, and my country is paying more and more attention to the construction concept of "low carbon, energy saving, green, and environmental protection." Due to their large size, hot blast stoves are constructed using a segmented installation method, with each furnace shell section assembled from multiple arc-shaped furnace tiles. In existing technology, furnace tile assembly is carried out on an assembly platform. Before assembly, positioning components need to be welded onto each arc-shaped furnace tile. After the furnace tiles are joined and fixed according to the positioning circles on the assembly platform, the positioning components welded to the furnace shell surface need to be cut off. The defects of the existing furnace shell assembly technology are: 1. Welding positioning components to connect the furnace tiles is a complicated and time-consuming operation; 2. The furnace shell surface is easily damaged after the positioning components are cut off and needs repair; 3. The roundness of the furnace shell is insufficient. Summary of the Invention

[0003] The present invention aims to solve the above problems, thereby providing an adjustment device for assembling the furnace shell while reducing the welding of unnecessary parts and ensuring that the furnace shell base material is not damaged.

[0004] The technical solution adopted by the present invention to solve the aforementioned problem is as follows:

[0005] A blast furnace hot blast stove shell assembly device includes a platform base, the geometric center of which is set as the reference center point for shell assembly; the outer edge of the platform base is provided with an assembly positioning circle set according to the diameter of the assembled shell, each arc-shaped shell plate is set on the assembly positioning circle, and a shell locator is provided on the inner side of each arc-shaped shell plate. The shell locator includes a fixing device, and each fixing device is equidistant from the reference center point; the shell locator also includes an upper slot fixed to the upper edge of the shell plate and a lower slot fixed to the lower edge of the shell plate; ear plates are provided on the inner side of the upper and lower slots; the upper slot ear plate is connected to an oblique telescopic bolt; the lower slot ear plate is connected to a horizontal telescopic screw; the other end of the oblique telescopic screw and the horizontal telescopic screw is connected to the fixing device.

[0006] Compared with the prior art, the present invention, which adopts the above technical solution, has the following beneficial effects:

[0007] ① The upper and lower ends of the furnace shell plate are fixed by U-shaped slots without damaging the furnace shell material.

[0008] ② Compared with the support and positioning structures in existing technologies, the support structure of the assembly locator has fewer node components, making it easier to install and correct, and reducing construction errors.

[0009] As a preferred option, a further technical solution for the above-mentioned blast furnace hot blast stove shell assembly device is:

[0010] The upper slot is a U-shaped slot with an opening facing downwards. At least one side of the upper slot has a tightening bolt, which passes through the end of the upper slot and connects to the pressure plate. The lower slot is a U-shaped slot with an opening facing upwards. The platform base has grooves at the locations where the upper and lower slots are positioned. In this design, the upper slot structure effectively secures the furnace shell, preventing it from detaching and falling off. The grooves on the platform base effectively position the lower slot, preventing slippage during support.

[0011] The oblique telescopic screw and the horizontal telescopic screw both include a threaded sleeve, with a lead screw installed at each end of the threaded sleeve. The threads of the two lead screws are in opposite directions, and the threaded sleeve is equipped with a rotating handle. This structure protects the strength of the support rod while also enabling length adjustment with a large range.

[0012] The construction method for splicing the blast furnace hot blast stove shell using the above-mentioned blast furnace hot blast stove shell assembly device includes the following specific operating steps:

[0013] The first step is to determine the center point of the assembled furnace shell on the platform base and determine the concentric circle positions of the upper and lower openings of the furnace shell; it is also necessary to draw a positioning circle for the fixing device based on the determined center point of the furnace shell; calculate the lengths of the horizontal telescopic screw and the oblique telescopic screw based on the radius of the furnace shell.

[0014] The second step is to hoist each arc-shaped furnace shell plate onto the platform base, install the lower slot at the bottom of the furnace shell plate, and fix the upper slot at the top of the furnace shell plate.

[0015] The third step is to roughly adjust the lengths of the horizontal and diagonal telescopic screws; the upper end of the diagonal telescopic screw is connected to the upper slot, and the lower end is connected to the retainer; one end of the horizontal telescopic screw is connected to the lower slot, and the other end is connected to the retainer.

[0016] The fourth step is to weld the fixture onto the fixture positioning circle marked on the platform base.

[0017] Fifth, based on the length calculated in the first step, fine-tune the length of the horizontal telescopic screw to accurately support the lower opening of the furnace shell to the radius position required by the drawing; fine-tune the oblique telescopic screw to support the upper opening of the furnace shell to the radius position required by the drawing.

[0018] Compared with existing technologies, the advantages of using the above construction method are:

[0019] 1. Convenient and quick, with high alignment efficiency, significantly shortening the alignment time for furnace shell assembly and connection. 2. Minimizes damage to the furnace shell base material. 3. Improves the efficiency of large hoisting machinery and reduces costs. 4. Installation is more time-saving, labor-saving, and cost-effective.

[0020] In the above operation, during the fifth step of adjusting the top of the furnace shell plate, a thin iron wire rope is placed at the diameter position of the top of the blast furnace, and a steel tape measure is used to measure at any time to provide a basis for adjustment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the positioning lines drawn on the platform base during the construction of this invention;

[0022] Figure 2 This is a schematic diagram showing the arc-shaped furnace shell plate being moved onto the platform base during the construction of this invention;

[0023] Figure 3 This is a schematic diagram of welding a fixing device onto the platform base during the construction of this invention;

[0024] Figure 4 This is a schematic diagram of the installation structure of the blast furnace hot blast stove shell assembly device during the construction of this invention;

[0025] Figure 5 This is a structural diagram of the blast furnace hot blast stove shell assembly device in this invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of the horizontal or oblique telescopic screw of the present invention;

[0027] Figure 7 This is a schematic diagram of the card slot structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the connection structure between the slotted bolt and the pressure plate in this invention;

[0029] Figure 9 This is a schematic diagram of the lower slot fixing structure of the present invention.

[0030] Explanation of reference numerals in the attached drawings: 1. Platform base; 2. Assembly positioning circle; 3. Furnace shell positioner; 4. Furnace shell plate; 5. Fixing device; 6. Horizontal telescopic screw; 6-1. Threaded sleeve; 6-2. Lead screw; 6-3. Rotating handle; 7. Lower slot; 8. Angled telescopic screw; 9. Upper slot; 9. Tightening bolt; 9-1. Pressure plate; 9-2. Rubber pad; 9-3. Protruding shaft; 9-4. Bearing groove; 9-5. Ear plate; 10. Groove; 11. Support plate; 12. Clamping ridge; 13. Detailed Implementation

[0031] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0032] See Figures 5 to 6The blast furnace hot blast stove shell assembly device provided by the present invention includes a platform base 1, the geometric center of which is set as the reference center point for shell assembly; the outer edge of the platform base 1 is provided with an assembly positioning circle 2 arranged according to the diameter of the assembled shell, each arc-shaped shell plate 4 is arranged on the assembly positioning circle 2, and a shell locator 3 is provided on the inner side of each arc-shaped shell plate 4. The shell locator 3 includes a fixing device 5, and each fixing device 5 is equidistant from the reference center point; the shell locator 3 also includes an upper slot 9 fixed to the upper edge of the shell plate 4 and a lower slot 7 fixed to the lower edge of the shell plate 4; the inner sides of the upper slot 9 and the lower slot 7 are provided with ear plates 10; the ear plates 10 of the upper slot 9 are connected to the oblique telescopic bolt 8; the ear plates 10 of the lower slot 7 are connected to the horizontal telescopic screw 6; the other ends of the oblique telescopic screw 8 and the horizontal telescopic screw 6 are connected to the fixing device 5.

[0033] like Figure 7 , Figure 8 As shown, in the above-mentioned device, the upper slot 9 is a U-shaped slot with an opening facing downwards. At least one side of the upper slot 9 has a tightening bolt 9-1, which passes through the end of the upper slot 9 and connects to the pressure plate 9-2. The pressure plate 9-2, supported by the tightening bolt 9-1, presses the surface of the furnace shell plate 4, firmly fixing the upper slot 9 to the upper edge of the furnace shell plate 4, preventing the upper slot from coming off and falling. Furthermore, the side of the pressure plate 9-2 that contacts the furnace shell plate 4 has a rubber pad 9-3, and the other side has a protruding shaft 9-4; the top surface of the tightening bolt 9-1 has a bearing groove 9-5 that matches the protruding shaft 9-4. With this design, the pressure plate 9-2 will not rotate when the bolt rotates, preventing wear on the surface of the furnace shell plate 4.

[0034] Combination Figure 5 and Figure 9As shown, in the above-mentioned device, the lower slot 7 is a U-shaped slot with an upward opening; the platform base 1 has a groove 11 corresponding to the setting position of the lower slot 7. After the furnace shell plate 4 is placed into the lower slot 7, the lower slot 7 cannot be dislodged. However, if there is no corresponding fixation, it may slip during the adjustment of the furnace shell roundness support. Although welding a protruding baffle to the platform base 1 can solve the problem, it will cause more protrusions on the surface of the assembled platform, which is detrimental to construction safety. Therefore, this solution has a structure with a groove 11 on the platform base 1, into which the lower slot 7 is placed, effectively positioning the lower slot 7 and preventing slippage during support. Addressing the issue that the platform base 1 is typically constructed using H-beams, and the web of the H-beam cannot stably support the lower slot after the groove is cut, this invention designs a groove 11 structure: a groove 11 is provided on the upper part of the H-beam. This groove 11 appears as a square through hole on the upper flange plate and as a notch on the web plate. Support plates 12 are provided on both sides of the web plate, with their upper and lower ends fixed to the flange plates. Clamping ribs 13 are provided on the inner side of the support plates. These clamping ribs 13, in conjunction with the clamping ribs 13, allow for clamping grooves on the lower slot, thus forming a fixed structure where the bottom of the lower slot 7 is supported by the web plate, and the sides of the lower slot 7 are supported by the support plates.

[0035] See attached document Figure 6 The inclined telescopic screw 8 and the horizontal telescopic screw 6 each include a threaded sleeve 6-1, with a lead screw 6-2 installed at each end of the threaded sleeve 6-1. The threads of the two lead screws 6-2 are in opposite directions, and the threaded sleeve 6-1 is provided with a rotating handle 6-3. This structure protects the strength of the support rod and also enables length adjustment with a large adjustment range.

[0036] The construction method for splicing the blast furnace hot blast stove shell using the above-mentioned blast furnace hot blast stove shell assembly device includes the following specific operating steps:

[0037] First step, see Figure 1 On the platform base 1, determine the center point of the assembled furnace shell and the concentric circle positions of the upper and lower openings of the furnace shell; it is also necessary to draw a positioning circle for the fixing device 5 with the center point of the determined furnace shell as the center; calculate the lengths of the horizontal telescopic screw 6 and the oblique telescopic screw 8 according to the radius of the furnace shell.

[0038] The second step is to hoist each arc-shaped furnace shell plate 4 onto the platform base 1, install the lower slot 7 at the bottom of the furnace shell plate 4, and fix the upper slot 9 at the top of the furnace shell plate 4.

[0039] The third step is to roughly adjust the lengths of the horizontal telescopic screw 6 and the oblique telescopic screw 8; the upper end of the oblique telescopic screw 8 is connected to the upper slot 9, and the lower end is connected to the fixing device 5; one end of the horizontal telescopic screw 6 is connected to the lower slot 7, and the other end is connected to the fixing device 5.

[0040] Step 4, see Figure 2 , Figure 3The fixture 5 is welded to the positioning circle of the fixture 5 drawn on the platform base 1.

[0041] Fifth step, combine with the appendix Figure 4 Based on the length calculated in the first step, fine-tune the length of the horizontal telescopic screw 6 to accurately support the lower opening of the furnace shell to the radius position required by the drawing; fine-tune the oblique telescopic screw 8 to support the upper opening of the furnace shell to the radius position required by the drawing.

[0042] In the fifth step of adjusting the upper opening of the furnace shell plate 4, a thin iron wire rope is placed at the diameter position of the upper opening of the blast furnace, and a steel tape measure is used to measure at any time to provide a basis for adjustment.

[0043] The beneficial effects of this invention are: 1. Convenient and quick, with high alignment efficiency, greatly shortening the alignment time for furnace shell assembly and connection. 2. Minimizes damage to the furnace shell base material. 3. Improves the efficiency of large hoisting machinery and reduces costs. 4. Installation is more time-saving, labor-saving, and cost-effective.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A construction method for splicing a furnace shell of a blast furnace hot blast furnace, wherein the furnace shell assembling device used comprises a platform base, the geometric center of the platform base is set as the furnace shell assembly reference center point; the outer edge of the platform base is provided with an assembly positioning circle set according to the diameter of the assembled furnace shell, and each arc furnace shell plate is arranged on the assembly positioning circle, characterized in that: The inner side of each arc-shaped furnace shell plate of the furnace shell assembly device is provided with a furnace shell locator, the furnace shell locator includes a fixer, and the distance between each fixer and the reference center point is equal; the furnace shell locator also includes an upper slot fixedly connected to the upper edge of the furnace shell plate, and a lower slot fixedly connected to the lower edge of the furnace shell plate, the upper slot is a U-shaped slot with an opening downward, and a tightening bolt is provided on at least one side baffle of the upper slot, and the tightening bolt passes through the end of the upper slot and is connected to the pressing plate; the lower slot is a U-shaped slot with an opening upward, and the setting position of the upper and lower slots of the platform base is provided with a groove; ear plates are provided on the inner sides of the upper slot and the lower slot; the upper slot ear plate is connected to the oblique telescopic screw; the lower slot ear plate is connected to the horizontal telescopic screw; the other ends of the oblique telescopic screw and the horizontal telescopic screw are connected to the fixer; the oblique telescopic screw and the horizontal telescopic screw include a threaded sleeve, and a lead screw is respectively installed at both ends of the threaded sleeve, and the thread directions of the two lead screws are opposite, and a rotating handle is provided on the threaded sleeve, Specific construction steps: The first step is to determine the center point of the assembled furnace shell on the platform base and the concentric circle positions of the upper and lower openings of the furnace shell; it is also necessary to draw a positioning circle for the fixture based on the determined center point of the furnace shell as the center of the circle; calculate the length of the horizontal telescopic screw and the oblique telescopic screw according to the radius of the furnace shell; The second step is to hoist each arc-shaped furnace shell plate onto the platform base, install the lower clamping groove at the bottom of the furnace shell plate, and fix the upper clamping groove at the top of the furnace shell plate; The third step is to roughly adjust the length of the horizontal telescopic screw and the oblique telescopic screw; the upper end of the oblique telescopic screw is connected to the upper slot, and the lower end is connected to the fixture; one end of the horizontal telescopic screw is connected to the lower slot, and the other end is connected to the fixture; Step 4: The fixture is welded to the fixture positioning circle drawn on the platform base; The fifth step is to fine-tune the length of the horizontal telescopic screw according to the length calculated in the first step, and accurately support the lower opening of the furnace shell to the radius position required by the drawing; fine-tune the oblique telescopic screw to support the upper opening of the furnace shell to the radius position required by the drawing.

2. The construction method for splicing the shell of a hot blast furnace according to claim 1 is characterized in that: In the fifth step, during the adjustment of the upper opening of the furnace shell plate, a thin wire rope is placed at the diameter position of the upper opening of the blast furnace, and a steel tape measure is used to measure at any time to provide a basis for adjustment.

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