Large assembling and welding working platform

Abstract

The utility model relates to the technical field of blast furnace shell auxiliary tools, in particular to a large-scale assembly welding working platform which comprises a platform body and hoisting connecting pieces, a plurality of mounting lugs are arranged on the outer edge of the platform body in the circumferential direction, each mounting lug is correspondingly connected with one hoisting connecting piece, the other end of each hoisting connecting piece is connected with a lug plate, and the lug plates are connected with the hoisting connecting pieces. The lug plates are connected with the inner wall of the furnace shell, and a plurality of lifting lugs are arranged on the platform body in the circumferential direction. According to the utility model, the assembling platform is built in the furnace shell, the platform is hoisted in the furnace shell, and different all-round scaffolds are built, so that the operation space is saved; and along with upward building of the furnace shell, the assembly platform can change the mounting position, is simple to disassemble and assemble and high in operability, and can also save the construction time.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tooling technology for blast furnace shells, specifically a large assembly and welding work platform. Background Technology

[0002] With the development of the 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, and environmental protection." Due to their large size, conventional blast furnaces are generally assembled and welded in sections during furnace shell installation. For example, in the Shougang Qian'an Steel large hot blast stove project, with a total height of 43,000m, the smallest inner diameter of the circumferential weld at the furnace shell joint is φ9840mm, and there are as many as twenty circumferential welds on site. Welding these welds on-site requires the construction of a platform. The traditional method of building a welding platform involves erecting a full-span scaffold inside the furnace shell. Erecting this full-span scaffold requires a large amount of steel pipe material, resulting in high costs. Furthermore, the initial erection and subsequent dismantling of the scaffold takes a long time, affecting the overall construction schedule. The full-span scaffold can only be dismantled after the entire furnace shell is assembled, during which time other construction processes cannot proceed. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model proposes a large-scale assembly and welding work platform that can replace the full-span scaffolding used in existing construction processes, providing reliable support for furnace shell installation, saving construction space, and offering convenient and quick assembly and disassembly, thus shortening the construction period.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A large assembly and welding work platform includes a platform body and a lifting connector. The platform body has a number of mounting ears arranged circumferentially on its outer edge. Each mounting ear is connected to a corresponding lifting connector. The other end of the lifting connector is connected to an ear plate, which is connected to the inner wall of the furnace shell. The platform body has a number of lifting ears arranged circumferentially.

[0006] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0007] This invention utilizes an assembly platform built inside the furnace shell, which is then hoisted into the furnace shell, eliminating the need for full-scale scaffolding and saving working space. As the furnace shell is built upwards, the assembly platform can be repositioned, making it easy to assemble and disassemble, highly operable, and saving construction time.

[0008] As a preferred embodiment, a further technical solution of this utility model is:

[0009] Furthermore, the platform body includes steel beams and pedals. The steel beams are assembled into a support frame, and the pedals are placed on top of the support frame.

[0010] Furthermore, several support beams are arranged circumferentially on the outer edge of the support frame, and connecting beams are arranged between adjacent support beams; each support beam has a telescopic beam at its cantilever end, with one end of the telescopic beam placed inside the support beam and slidably connected to it.

[0011] Furthermore, each support beam has a telescopic cylinder hinged to its bottom, and the piston rod of the telescopic cylinder is hinged to the telescopic beam.

[0012] Furthermore, a top plate is provided at the cantilever end of the telescopic beam, and a rubber pad is provided on the outer side of the top plate.

[0013] Furthermore, an installation plate is provided inside the cantilever end of the telescopic beam. A guide hole is provided on the installation plate, and a guide rod is slidably connected in the guide hole. A limit plate is provided at the inner end of the guide rod, and a roller is provided at the outer end of the guide rod. A spring is provided between the guide rod, the installation plate, and the roller. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of Example 1;

[0015] Figure 2 for Figure 1 AA cross-section view;

[0016] Figure 3 for Figure 2 Enlarged view of part B;

[0017] Figure 4 The diagram shows the installation of the support beam in Examples 2 and 3.

[0018] Figure 5 This is a schematic diagram of the telescopic beam in Example 2;

[0019] Figure 6 This is a schematic diagram of the telescopic beam in Example 3;

[0020] Explanation of reference numerals in the attached drawings: 1. Furnace shell; 2. Support frame; 3. Pedal; 4. Lifting connector; 5. Lifting lug; 6. Mounting lug; 7. Lug plate; 8. Support beam; 9. Connecting beam; 10. Telescopic beam; 11. Telescopic cylinder; 12. Top plate; 13. Rubber pad; 14. Mounting plate; 15. Guide rod; 16. Spring; 17. Limiting plate; 18. Roller; 19. Roller frame. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] Example 1: As Figures 1 to 3 As shown, a large assembly and welding work platform consists of a platform body and a hoisting connector 4. The platform body is a circular or nearly circular support frame 2 assembled from several horizontal and vertical steel beams. Patterned steel plates are laid on the support frame 2 as step plates 3.

[0023] In this embodiment, a number of mounting ears 6 are welded at equal intervals around the outer edge of the support frame 2. Each mounting ear is hinged to one end of the hoisting connector 4. The other end of the hoisting connector 4 is also hinged to an ear plate 7. The ear plate 7 is welded and fixed to the inner wall of the furnace shell 1.

[0024] In this embodiment, four lifting points are evenly arranged on the support frame 2, and each lifting point is welded with a lifting lug 5 for lifting the platform body.

[0025] In this embodiment, the platform body is assembled on the ground, and the welding position of the ear plate 7 is selected according to the position of the platform body inside the furnace shell 1. The ear plate 7 is then welded and fixed to the inner wall of the furnace shell 1. Then, the hoisting equipment uses the lifting lugs 5 to lift the platform body into the furnace shell 1, and connects the hoisting connectors 4 to the ear plates 7 one by one to complete the installation of the platform body. Construction personnel then perform welding operations on the inner wall of the furnace shell 1 on the platform body. After the welding of the inner wall of the furnace shell 1 at this position is completed, the hoisting equipment is connected to the lifting lugs 5, the connection between the hoisting connectors 4 and the ear plates 7 is released, and the ear plates 7 are cut off. The hoisting equipment then lifts the platform body to the next welding position and welds the ear plates 7 at the corresponding position, so that the hoisting connectors 4 and the ear plates 7 are reconnected. Construction personnel then continue the welding operation.

[0026] Example 2: As Figure 4 , Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the support frame 2 has several support beams 8 welded at equal intervals along its outer circumference, and adjacent support beams 8 are connected and reinforced by connecting beams 9. In this embodiment, the number of connecting beams 9 between adjacent support beams can be determined according to the length of the support beams 8.

[0027] The support beam 8 can be made of two channel steels welded together or square steel pipes. Each support beam 8 has a telescopic beam 10 at its cantilever end. One end of the telescopic beam 10 is placed inside the support beam 8 and is slidably connected to the support beam 8.

[0028] Each support beam 8 has a telescopic cylinder 11 hinged to its bottom suspension end. The end of the piston rod of the telescopic cylinder 11 is hinged to the bottom of the telescopic beam 10. The telescopic cylinder 11 drives the piston rod to extend and retract the telescopic beam 10.

[0029] In this embodiment, the number of support beams 8 can be determined according to the size of the support frame 2, and the number of support beams 8 can be 8 to 16. Steps 3 are also laid between two adjacent support beams 8 and between two adjacent telescopic beams 10 to increase the working area of ​​the platform body.

[0030] The top plate 12 is vertically welded to the cantilever end of the telescopic beam 10, and a rubber pad 13 is provided on the outer side of the top plate 12.

[0031] In this embodiment, when the working platform is hoisted into the furnace shell 1, the telescopic beam 10 is in a non-extended state. After the platform body is connected to the furnace shell 1 through the hoisting connector 4, the telescopic cylinder 11 is driven to push the telescopic beam 10 to a suitable length so that the rubber pad 13 on the outside of the top plate 12 abuts against the inner wall of the furnace shell 1. Then, the step plate 3 is installed between adjacent telescopic beams 10 to expand the working area of ​​the working platform. When it is necessary to hoist the working platform to the next installation position, the hoisting equipment is connected to the lifting lug 5, then the step plate 3 between adjacent telescopic beams 10 is removed and the telescopic cylinder 11 is driven to retract the telescopic beam 10. The connection between the hoisting connector 4 and the lug 7 is released and the lug 7 is cut off. The hoisting working platform is lifted to the next installation position and reconnected to the lug 7 at the corresponding position. Then, the telescopic cylinder 11 is driven to push the telescopic beam 10 out to abut against the furnace shell 1. Finally, the step plate 3 is laid.

[0032] In this embodiment, the telescopic beam 10 can change the diameter of the working platform to accommodate furnace shells 1 of different diameters. Furthermore, the top plate 12 at the cantilever end of the telescopic beam 10, compared with the inner wall of the furnace shell 1, can ensure the stability of the working platform during construction operations and prevent the working platform from shaking.

[0033] Example 3: As Figure 4 , Figure 6 As shown, the difference between this embodiment and embodiment 2 is that, in this embodiment, two layers of mounting plates 14 are welded at intervals inside the cantilever end of the telescopic beam 10. Each mounting plate 14 has at least two guide holes, and the guide holes on the two mounting plates 14 are set one-to-one. The two corresponding guide holes on the two mounting plates 14 are penetrated by a guide rod 15, and the guide rod 15 is slidably set in the two guide holes it penetrates.

[0034] Each guide rod 15 has a limit plate 17 at its inner end, and the outer ends of the two guide rods 15 are connected to the rollers 18 via roller frames 19; a spring 16 is fitted between the outer mounting plate 14 and the roller frame 19 of each guide rod 15.

[0035] In this embodiment, when the working platform is hoisted into the furnace shell 1, the telescopic beam 10 is in a non-extended state. After the platform body is connected to the furnace shell 1 through the hoisting connector 4, the telescopic cylinder 11 is driven to push the telescopic beam 10 out until the roller 18 abuts against the surface of the furnace shell 1. Then, the pedal 3 is installed between adjacent telescopic beams 10 to expand the working area of ​​the working platform. When it is necessary to hoist the working platform to the next installation position, the hoisting equipment is connected to the lifting lug 5, and then the connection between the hoisting connector 4 and the lug 7 is released and the lug 7 is cut off. The working platform is then lifted by the hoisting equipment. During the lifting process, the working platform rises steadily along the inner wall of the furnace shell 1 through the roller 18 at the suspended end of the telescopic beam 10.

[0036] In this embodiment, the number of guide rods 15 can be increased to 3 or 4.

[0037] In this embodiment, the mounting plate 14, telescopic rod, spring 16, and roller 18 form a buffer structure at the suspended end of the telescopic beam 10, which can effectively prevent the work platform from shaking significantly and ensure the stability of the construction platform. During the lifting process, if the furnace shell 1 remains unchanged in diameter at its vertical position, the lifting equipment is connected to the lifting lug 5. After disconnecting the lifting connector 4 from the lug 7 and cutting off the lug 7, the lifting equipment can directly lift the work platform. The work platform can move smoothly upward along the inner wall of the furnace shell 1 via the roller 18, preventing the work platform from shaking during the lifting process, simplifying the lifting steps, and improving the installation efficiency of the work platform.

[0038] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A large assembly welding work platform characterized by: The platform body is provided with a plurality of mounting ears in the outer edge circumference, each mounting ear is connected with a hoisting connecting piece, the other end of the hoisting connecting piece is connected with an ear plate, the ear plate is connected with the inner wall of the furnace shell, and the platform body is provided with a plurality of lifting lugs in the outer edge circumference; The platform body comprises a steel beam and a stepping plate, the steel beam is assembled into a support framework, and the stepping plate is arranged above the support framework; The outer edge of the support framework is provided with a plurality of support beams in the outer edge circumference, and a connecting beam is arranged between adjacent support beams; the overhanging end of each support beam is provided with an expansion beam, one end of the expansion beam is arranged inside the support beam and is in sliding connection with the support beam; The bottom of each support beam is hingedly connected with an expansion cylinder, and the piston rod of the expansion cylinder is hingedly connected with the expansion beam; The overhanging end of the expansion beam is internally provided with a mounting plate, the mounting plate is provided with a guide hole, the guide hole is in sliding connection with a guide rod, the inner end of the guide rod is provided with a limiting plate, the outer end of the guide rod is provided with a roller, and the guide rod is provided with a spring between the mounting plate and the roller.

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