Supporting and reinforcing system for whole belt replacement of blast furnace shell and mounting method

Abstract

The invention discloses a supporting and reinforcing system for whole belt replacement of a blast furnace shell, which comprises an upper platform reinforcing device and a lower platform reinforcing device, the upper platform reinforcing device is fixed on a frame beam around an upper platform, and the lower platform reinforcing device is fixed on a lower blast furnace platform; the upper-layer platform reinforcing device comprises a plurality of pieces of first profile steel and steel corbels, the plurality of pieces of first profile steel surround the gas sealing cover, and the first profile steel and the gas sealing cover are connected through the steel corbels; the lower-layer platform reinforcing device comprises a second profile steel bracket; and the second profile steel bracket is respectively connected with the blast furnace shell and the blast furnace platform frame beam in a welding manner. The upper platform and the lower platform of the replacement part are reinforced before the whole belt of the furnace shell is replaced, so that the risk of displacement and inclination in the whole belt replacement process of the blast furnace can be effectively prevented, and the construction process is safer.

Description

Technical Field

[0001] The invention belongs to the field of blast furnace equipment steel structure installation, and in particular relates to a support reinforcement system and an installation method for replacing the entire belt of a blast furnace shell. Background Art

[0002] The blast furnace is the most important link in the iron-making process. During the long-term production process, the furnace shell in the high-temperature zone is deformed under long-term high-temperature conditions and needs to be replaced as a whole. Before removing the furnace shell, the upper and lower layers of the furnace shell to be removed need to be reinforced to avoid the upper part of the blast furnace body from tilting during the replacement of the furnace shell, which is dangerous. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a support reinforcement system and an installation method for replacing the entire belt of a blast furnace shell, thereby solving the problem of the blast furnace tilting and collapsing that may be caused by replacing the entire belt of the blast furnace shell in the prior art.

[0004] The present invention adopts the following technical solutions to solve the above technical problems: A support and reinforcement system for replacing the entire belt of a blast furnace shell, comprising an upper platform reinforcement device and a lower platform reinforcement device, wherein the upper platform reinforcement device is fixed to the frame beams around the upper platform, and the lower platform reinforcement device is fixed to the lower blast furnace platform; the upper platform reinforcement device comprises a plurality of first steel sections and steel brackets, the plurality of first steel sections surround a gas enclosure, and the first steel sections and the gas enclosure are connected via the steel brackets; the lower platform reinforcement device comprises a second steel bracket, and the second steel bracket is respectively welded to the blast furnace shell and the blast furnace platform frame beam.

[0005] The upper platform reinforcement device comprises four first-shaped steels, which are vertically connected to each other, and each first-shaped steel is connected to the gas enclosure via a steel bracket.

[0006] The two ends of the first steel section are overlapped on the blast furnace platform frame beams around the upper platform and are welded to the blast furnace platform frame beams.

[0007] The steel corbels and the gas enclosure, the first steel sections, the first steel sections and the blast furnace platform frame beam, and two adjacent first steel sections are all connected by welding.

[0008] Two adjacent first steel sections are butt-welded, and rib plates are used in the butt beams to strengthen the connection.

[0009] The lower flange plate of the first steel section is pressed against the shell of the gas enclosure.

[0010] The second steel support comprises 8 second steels, and the 8 second steels are evenly distributed around the blast furnace shell along the circumferential direction.

[0011] One end of the second steel section is welded to the blast furnace shell, and the other end is welded to the blast furnace platform frame beam.

[0012] The installation method of the support reinforcement system for replacing the entire belt of the blast furnace shell comprises the following steps: Step 1: Determine the specifications and dimensions of each part of the support and reinforcement system according to the specifications of the blast furnace shell; Step 2, using the first steel to surround the gas enclosure, connecting the first steel to the gas enclosure through a bracket, welding two adjacent first steels together, and placing the first steel on the blast furnace platform frame beams around the upper platform and welding and fixing them to the blast furnace platform frame beams; Step 3: Use the second steel section to evenly arrange it around the blast furnace shell of the lower platform, weld and fix one end of the second steel section to the blast furnace shell, and weld and fix the other end to the blast furnace platform frame beam.

[0013] The first steel section includes four H400*400*13*21 steel sections made of Q355 material, and the second steel section includes four H294*200*8*121 steel sections made of Q235 material.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Before replacing the entire belt of the furnace shell, the upper and lower platforms of the replacement part are reinforced, which can effectively prevent the risk of displacement and tilting during the replacement of the entire belt of the blast furnace, making the construction process safer.

[0015] 2. The device has a simple structure and can be realized by using on-site materials. In actual operation, if there is no suitable steel available on site, Q355 can be used to replace Q235 steel, or steel of the same material but larger specifications can be used instead. The principle of substitution is to replace low with high and weak with strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the reinforcement of the upper platform of the present invention.

[0017] Figure 2 This is a schematic diagram of the connection between the first steel section and the frame beam of the upper platform of the present invention.

[0018] Figure 3 It is a schematic diagram of the connection between the first steel sections of the upper platform of the present invention.

[0019] Figure 4 It is a schematic diagram of the installation of the upper platform corbel of the present invention.

[0020] Figure 5 This is a schematic diagram of the second steel distribution of the lower platform of the present invention.

[0021] Figure 6 This is a schematic diagram of the second steel structure of the present invention.

[0022] Figure 7 This is a schematic diagram of the reinforcement of the lower platform of the present invention.

[0023] Among them, the markings in the figure are: 1-platform diagonal brace; 2-first steel section; 3-steel corbel; 4-blast furnace platform frame beam; 5-gas seal; 6-furnace shell. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, rather than all of the embodiments.

[0025] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work should fall within the scope of protection of this application.

[0026] A support and reinforcement system for replacing the entire belt of a blast furnace shell, comprising an upper platform reinforcement device and a lower platform reinforcement device, wherein the upper platform reinforcement device is fixed to the frame beams around the upper platform, and the lower platform reinforcement device is fixed to the lower blast furnace platform; the upper platform reinforcement device comprises a plurality of first steel sections and steel brackets, the plurality of first steel sections surround a gas enclosure, and the first steel sections and the gas enclosure are connected via the steel brackets; the lower platform reinforcement device comprises a second steel bracket, and the second steel bracket is respectively welded to the blast furnace shell and the blast furnace platform frame beam.

[0027] Specific embodiments, such as Figures 1 to 7 As shown, A support and reinforcement system for replacing the entire belt of a blast furnace shell, comprising an upper platform reinforcement device and a lower platform reinforcement device, wherein the upper platform reinforcement device is fixed to the frame beams 4 around the upper platform, and the lower platform reinforcement device is fixed to the lower blast furnace platform; the upper platform reinforcement device comprises a plurality of first steel sections 2 and steel brackets 3, the plurality of first steel sections 2 surround a gas enclosure 5, and the first steel sections 2 and the gas enclosure 5 are connected via the steel brackets 3; the lower platform reinforcement device comprises a second steel bracket, and the second steel bracket is respectively welded to the blast furnace shell 6 and the blast furnace platform frame beams 4.

[0028] The upper platform reinforcement device described in this embodiment includes four first steel sections 2 , which are vertically connected to each other, and each first steel section 2 is connected to the gas enclosure 5 via a steel corbel 3 .

[0029] The two ends of the first steel section 2 are overlapped on the blast furnace platform frame beam 4 around the upper platform, and are welded to the blast furnace platform frame 4 beam.

[0030] The steel corbel 3 and the gas enclosure 5, the first steel 2, the first steel 2 and the blast furnace platform frame beam 4, and two adjacent first steels 2 are connected by welding.

[0031] Two adjacent first steel sections 2 are butt-welded, and rib plates are used in the butt beams to strengthen the connection.

[0032] The lower flange plate of the first steel section 2 is pressed against the shell of the gas enclosure 5 .

[0033] The second steel section 2 support comprises eight second steel sections 7 , and the eight second steel sections 7 are evenly distributed around the blast furnace shell 6 along the circumferential direction.

[0034] One end of the second steel section is welded to the blast furnace shell, and the other end is welded to the blast furnace platform frame beam.

[0035] The installation method of the support reinforcement system for replacing the entire belt of the blast furnace shell comprises the following steps: Step 1: Determine the specifications and dimensions of each part of the support and reinforcement system according to the specifications of the blast furnace shell; Step 2, using the first steel to surround the gas enclosure, connecting the first steel to the gas enclosure through a bracket, welding two adjacent first steels together, and placing the first steel on the blast furnace platform frame beams around the upper platform and welding and fixing them to the blast furnace platform frame beams; Step 3: Use the second steel section to evenly arrange it around the blast furnace shell of the lower platform, weld and fix one end of the second steel section to the blast furnace shell, and weld and fix the other end to the blast furnace platform frame beam.

[0036] The first steel section includes four H400*400*13*21 steel sections made of Q355 material, and the second steel section includes four H294*200*8*121 steel sections made of Q235 material.

[0037] The following is a specific example to illustrate the specific application and installation method of the support reinforcement system.

[0038] After the demolition of a furnace shell, in order to prevent the furnace shell at the demolished part from falling and shifting, the furnace shell to be demolished and replaced needs to be reinforced before the demolition construction.

[0039] Reinforcement measures: Reinforce the upper and lower platforms of the furnace shell to be dismantled respectively.

[0040] Reinforcement measures for the upper platform: 4 H400*400*13*21 steels made of Q355 are used to surround the gas hood, and 4 H-shaped steels are connected to the gas hood through brackets (the brackets and the hood, as well as the brackets and the 4 H-shaped steels are welded); H-shaped steel is installed on the blast furnace platform with an elevation of 41m. H400*400*13*21 steel is directly supported on the frame beams around the upper platform and is firmly welded to the frame beams of the blast furnace. The weld is not less than 10mm. The lower flange of the H-shaped steel must be pressed against the shell of the gas enclosure; H400 steel sections are butt welded, the middle of the butt beam is reinforced with a 12mm rib plate, and the butt weld height is 12mm.

[0041] Reinforcement measures for the lower platform: 8 H-shaped steels (H294*200*8*121) made of Q235 are welded at the lower blast furnace platform of the furnace shell to be dismantled and replaced. The H-shaped steels are welded to the blast furnace shell and the corresponding blast furnace platform frame beams respectively.

[0042] In actual operation, if there is no suitable steel available on site, Q355 can be used instead of Q235 steel, or steel of the same material but larger specifications can be used instead. The principle of substitution is to replace low with high and weak with strong.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0045] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0046] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] This solution is not limited to the above-mentioned specific implementation methods, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of this solution without departing from the scope of the technical solution of this solution, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essential content of this solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of this solution without departing from the content of the technical solution of this solution still falls within the scope of protection of the technical solution of this solution.

Claims

1. A support and reinforcement system for replacing the entire belt of a blast furnace shell, characterized in that: It comprises an upper platform reinforcement device and a lower platform reinforcement device, wherein the upper platform reinforcement device is fixed on the frame beams around the upper platform, and the lower platform reinforcement device is fixed on the lower blast furnace platform; the upper platform reinforcement device comprises a plurality of first-shaped steels and steel brackets, the plurality of first-shaped steels surround the gas enclosure, and the first-shaped steels and the gas enclosure are connected by the steel brackets; the lower platform reinforcement device comprises a second-shaped steel bracket, and the second-shaped steel bracket is respectively welded to the blast furnace shell and the blast furnace platform frame beam.

2. The support and reinforcement system for replacing the entire belt of a blast furnace shell according to claim 1 is characterized in that: The upper platform reinforcement device comprises four first-shaped steels, which are vertically connected to each other, and each first-shaped steel is connected to the gas enclosure via a steel bracket.

3. The support and reinforcement system for replacing the entire belt of a blast furnace shell according to claim 2 is characterized in that: The two ends of the first steel section are overlapped on the blast furnace platform frame beams around the upper platform and are welded to the blast furnace platform frame beams.

4. The support and reinforcement system for replacing the entire belt of a blast furnace shell according to claim 3 is characterized in that: The steel corbels and the gas enclosure, the first steel sections, the first steel sections and the blast furnace platform frame beam, and two adjacent first steel sections are all connected by welding.

5. The support and reinforcement system for replacing the entire belt of a blast furnace shell according to claim 4 is characterized in that: Two adjacent first steel sections are butt-welded, and rib plates are used in the butt beams to strengthen the connection.

6. The support and reinforcement system for replacing the entire belt of a blast furnace shell according to claim 2 is characterized in that: The lower flange plate of the first steel section is pressed against the shell of the gas enclosure.

7. The support and reinforcement system for replacing the entire belt of a blast furnace shell according to claim 1 is characterized in that: The second steel support comprises 8 second steels, and the 8 second steels are evenly distributed around the blast furnace shell along the circumferential direction.

8. The support and reinforcement system for replacing the entire belt of a blast furnace shell according to claim 7 is characterized in that: One end of the second steel section is welded to the blast furnace shell, and the other end is welded to the blast furnace platform frame beam.

9. The installation method of the support reinforcement system for the replacement of the entire belt of the blast furnace shell is characterized by: The steps include: Step 1: Determine the specifications and dimensions of the various parts of the support and reinforcement system according to any one of claims 1 to 8 according to the specifications of the blast furnace shell; Step 2, using the first steel to surround the gas enclosure, connecting the first steel to the gas enclosure through a bracket, welding two adjacent first steels together, and placing the first steel on the blast furnace platform frame beams around the upper platform and welding and fixing them to the blast furnace platform frame beams; Step 3: Use the second steel section to evenly arrange it around the blast furnace shell of the lower platform, weld and fix one end of the second steel section to the blast furnace shell, and weld and fix the other end to the blast furnace platform frame beam.

10. The method for replacing the entire belt of a blast furnace shell according to claim 9, characterized in that: The first steel section includes four H400*400*13*21 steel sections made of Q355 material, and the second steel section includes four H294*200*8*121 steel sections made of Q235 material.

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