A sectional manufacturing method for a portal steel structure of a drum reclaimer

Abstract

This invention relates to the field of roller reclaimer technology, specifically to a method for segmented manufacturing of the gantry steel structure of a roller reclaimer, comprising the following steps: S1: Segmenting the gantry steel structure and merging the flange connection positions of each component; S2: After the segmented manufacturing of the gantry steel structure is completed, inspecting the dimensional accuracy of each component; S3: After the dimensional accuracy of each component of the gantry steel structure has been inspected and approved, assembling the gantry steel structure by welding the components together, and then cutting and disassembling the components at the flange connection positions; S4: After completing the assembly and disassembly of the gantry steel structure, delivering the components to the construction site for assembly and fixing. This invention can effectively ensure the dimensional accuracy of the manufactured gantry steel structure, improve the dimensional accuracy of the manufactured gantry steel structure, and avoid installation difficulties and operational malfunctions of the roller reclaimer.

Description

Technical Field

[0001] This invention relates to the field of roller reclaimer technology, and more specifically to a method for segmented manufacturing of the steel structure of a roller reclaimer gantry. Background Technology

[0002] A roller reclaimer is a continuous material handling device widely used in bulk material yards, such as ports, power plants, steel mills, and cement plants. It is primarily used to efficiently and uniformly extract bulk materials from stockpiles and transport them to downstream belt conveyor systems. It offers advantages such as uniform and stable material handling, good mixing effect, and good adaptability to various materials. The gantry steel structure is a crucial component for realizing the roller reclaimer's material handling function. It not only supports the roller reclaimer's components but also serves as the platform for its key functions. The gantry steel structure has a core load-bearing function, needing to withstand and transmit all the enormous static and dynamic loads. Furthermore, the gantry steel structure determines the material handling size and movement range of the roller reclaimer, while its width determines the width of the stockpile that the roller reclaimer can handle. Specifically, the gantry steel structure supports the conveyor belt and frame, and rollers are installed within the gantry steel structure to support the supporting rollers.

[0003] The gantry steel structure is assembled from the flexible leg side of the main beam, the middle section of the main beam, the rigid leg side of the main beam, the rigid leg, the flexible leg, the hangers, and the diagonal bracing tubes. In the existing technology, when manufacturing the gantry steel structure, the flexible leg side of the main beam, the middle section of the main beam, the rigid leg side of the main beam, the rigid leg, the flexible leg, the hangers, and the diagonal bracing tubes are usually manufactured in sections and then transported to the construction site for assembly into a gantry steel structure. However, during on-site assembly, the dimensional accuracy of each straight section of the gantry steel structure cannot be better guaranteed due to the presence of connecting plates, thus failing to effectively guarantee the dimensional accuracy of the gantry steel structure. As the core skeleton of the roller reclaimer, the dimensional accuracy of the gantry steel structure is the foundation for the manufacturing, installation, and operation of the roller reclaimer. It is prone to installation difficulties and operational failures, and may even lead to safety accidents, causing long-term production stoppages and economic losses. Summary of the Invention

[0004] To address the problem that existing technologies cannot effectively guarantee the dimensional accuracy of gantry steel structures during assembly, this invention provides a segmented manufacturing method for the gantry steel structure of a roller reclaimer. This method effectively ensures the dimensional accuracy of the manufactured gantry steel structure, improves the dimensional accuracy of the manufactured gantry steel structure, avoids installation difficulties and operational malfunctions of the roller reclaimer, and prevents safety accidents.

[0005] To achieve the above objectives, the technical solution of the present invention is: a method for segmented manufacturing of the steel structure of a drum reclaimer gantry, comprising the following steps:

[0006] S1: The portal steel structure is manufactured in sections, and the flange connection positions of each component are manufactured together. The portal steel structure includes the middle section of the main beam, the rigid leg side of the main beam, the flexible leg side of the main beam, rigid leg one, rigid leg two, rigid leg three, flexible leg one, flexible leg two, hanger one, hanger two, and diagonal braces. This helps to ensure the dimensional accuracy of each component of the portal steel structure and avoids large errors during the manufacturing of each component.

[0007] S2: After the portal steel structure is manufactured in sections, inspect the dimensional accuracy of each component to ensure it meets the requirements for assembling the portal steel structure. This will improve the dimensional accuracy of the manufactured portal steel structure.

[0008] S3: After the dimensional accuracy of all components of the gantry steel structure has been inspected and approved, the gantry steel structure is assembled. The components are then welded together, and subsequently disassembled at the flange connection points. This method of assembling and welding the components before disassembling facilitates transportation of the gantry steel structure to the construction site and also addresses the issue of inconsistent dimensional accuracy due to connecting plates.

[0009] S4: After completing the assembly and disassembly of the gantry steel structure, deliver the various components of the gantry steel structure to the construction site for assembly and fixing.

[0010] Further, step S1 includes the following steps:

[0011] S11: The middle section of the main beam, the rigid leg side of the main beam, and the flexible leg side of the main beam are manufactured as a whole to ensure the straightness of the track and the camber of the main beam of the portal steel structure.

[0012] S12: The flange plates of the rigid leg side of the main beam and the diagonal bracing of the rigid leg are manufactured together with the flange plates of the diagonal bracing to form the splicing flange body six and splicing flange body seven.

[0013] S13: The flange plates at the upper ends of rigid leg one and rigid leg three are combined with the flange plates on the side of the rigid leg of the main beam to form a spliced ​​flange body one, and the flange plates on the inner sides of rigid leg one and rigid leg three are combined with the flange plate of rigid leg two to form a spliced ​​flange body two.

[0014] S14: Combine the flange plates of flexible leg one and flexible leg two to form a spliced ​​flange body three, and then manufacture flexible leg one and flexible leg two as a whole in sections.

[0015] S15: Combine the flange plates at the upper ends of hangers 1 and 2 with the flange plates on the flexible leg side of the main beam to form a composite flange body 5; and combine the flange plates at the lower ends of hangers 1 and 2 to form a composite flange body 4.

[0016] Furthermore, step S3 includes the following steps:

[0017] S31: Assemble and weld the first flange of rigid leg one and rigid leg three to the rigid leg side of the main beam, and assemble and weld the second flange of rigid leg one and rigid leg three to rigid leg two; then cut and disassemble the first flange and the second flange.

[0018] S32: The segmented flexible leg one and flexible leg two are assembled and welded together, and then the assembled flange body three is cut and disassembled.

[0019] S33: Assemble and weld the fifth flange of hanger one and hanger two to the flexible leg side of the main beam, and assemble and weld hanger one and hanger two through the fourth flange. Then cut and disassemble the fifth flange and the fourth flange.

[0020] S34: Assemble and weld the diagonal brace to flange six and flange seven, and then cut and disassemble flange six and flange seven.

[0021] Furthermore, in step S31, rigid leg lower flanges are assembled and welded to the lower ends of both rigid leg one and rigid leg three, with a trimming allowance left on the rigid leg lower flanges. By trimming the rigid leg lower flanges with this allowance, the flatness of the rigid leg lower flanges can be effectively guaranteed, thereby facilitating the connection of the roller reclaimer's traveling mechanism.

[0022] Furthermore, in step S31, after the flange body 2 of the rigid leg 1 and rigid leg 3 is assembled with the rigid leg 2, the hinge hole of the roller bracket is integrally marked on the rigid leg 2. This improves the accuracy of the machining of the hinge hole of the roller bracket, thereby improving the accuracy of the installation of the roller bracket.

[0023] Furthermore, in step S32, flexible leg one and flexible leg two are assembled and welded in three sections. The lower ends of both flexible leg one and flexible leg two are assembled and welded with flexible leg lower flanges, with a trimming allowance left on the flexible leg lower flanges. By trimming the flexible leg lower flanges with this allowance, the flatness of the flexible leg lower flanges can be effectively guaranteed, thereby facilitating connection to the traveling mechanism of the roller reclaimer.

[0024] Furthermore, in step S33, after the assembly of the flange body five of hanger one and hanger two with the flexible leg side of the main beam is completed, the hinge holes of the roller bracket are integrally marked on hanger one and hanger two to improve the accuracy of the machining of the hinge holes of the roller bracket, thereby improving the accuracy of the installation of the roller bracket.

[0025] Furthermore, in step S3, connecting plates are used to perform drilling and marking operations on flange body one, flange body two, flange body three, flange body four, flange body five, flange body six, and flange body seven. Using connecting plates for drilling and marking facilitates subsequent hole matching operations, and the connecting plates are also used to assemble and fix the various components of the portal steel structure at their flange connection positions, improving the dimensional accuracy of the assembled portal steel structure.

[0026] Furthermore, in step S3, after completing the drilling and marking work using the connecting plate, the hole matching work is then carried out; subsequently, the main beam is cut and disassembled into its central section, rigid leg side, and flexible leg side. The main beam is cut and disassembled into its central section, rigid leg side, and flexible leg side to facilitate transportation and delivery to the construction site.

[0027] Furthermore, in step S4, after the various components of the gantry steel structure are delivered to the construction site, the various components of the gantry steel structure can be assembled using connecting plates and fixedly connected using fasteners. The various components are assembled at the flange connection positions of the various components of the gantry steel structure using connecting plates and fasteners.

[0028] The beneficial effects of the present invention through the above technical solution are as follows:

[0029] This invention, by manufacturing the gantry steel structure in sections and merging the flange connection points of each component, helps ensure the dimensional accuracy of each component, thereby guaranteeing the dimensional accuracy of the assembled gantry steel structure. By assembling and welding the manufactured gantry steel structure components together and then cutting and disassembling them at the flange connection points, the components can be easily transported to the construction site. Connecting plates are then used to assemble and fix the components, ensuring the dimensional accuracy of the gantry steel structure and improving its overall precision. This avoids difficulties in installing and malfunctioning the roller reclaimer, as well as potential safety accidents. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the steel structure of the gantry of the present invention;

[0031] Figure 2 This is a structural schematic diagram of the rigid side of the gantry steel structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the flexible side of the gantry steel structure of the present invention;

[0033] Figure 4 This is a structural schematic diagram of the middle section of the main beam of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the rigid leg side of the main beam of the present invention. Figure 1 ;

[0035] Figure 6 This is a schematic diagram of the structure of the rigid leg side of the main beam of the present invention. Figure 2 ;

[0036] Figure 7 This is a schematic diagram of the structure of the flexible leg side of the main beam of the present invention. Figure 1 ;

[0037] Figure 8 This is a schematic diagram of the structure of the flexible leg side of the main beam of the present invention. Figure 2 ;

[0038] Figure 9 This is an exploded structural diagram of the rigid leg of the present invention;

[0039] Figure 10 This is a schematic diagram of the flexible leg structure of the present invention;

[0040] Figure 11 This is a schematic diagram of the structure of the hanger of the present invention;

[0041] Figure 12 This is a schematic diagram of the diagonal brace of the present invention;

[0042] Figure 13 This is a schematic diagram of the structure of the rigid leg and the main beam of the present invention;

[0043] Figure 14 This is a schematic diagram of the flexible leg splicing structure of the present invention;

[0044] Figure 15 This is a schematic diagram of the structure of the hanger and the main beam of the present invention;

[0045] Figure 16 This is a schematic diagram of the structure of the diagonal brace and the main beam of the present invention.

[0046] The labels in the attached diagram are as follows: 1 is the middle section of the main beam, 2 is the side of the rigid leg of the main beam, 3 is the side of the flexible leg of the main beam, 4 is rigid leg one, 5 is rigid leg two, 6 is rigid leg three, 7 is the lower flange of the rigid leg, 8 is the first flange of the splicing mechanism, 9 is the connecting plate, 10 is the second flange of the splicing mechanism, 11 is the first flexible leg, 12 is the second flexible leg, 13 is the third flange of the splicing mechanism, 14 is the lower flange of the flexible leg, 15 is the first hanger, 16 is the second hanger, 17 is the fourth flange of the splicing mechanism, 18 is the fifth flange of the splicing mechanism, 19 is the diagonal brace, 20 is the sixth flange of the splicing mechanism, and 21 is the seventh flange of the splicing mechanism. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0048] like Figures 1 to 16As shown, a method for manufacturing segmented steel structures for a roller reclaimer gantry includes the following steps:

[0049] S1: Based on the stress characteristics of the portal steel structure and the camber requirements of the main beam, the portal steel structure is manufactured in sections. This helps to ensure the dimensional accuracy of each component of the portal steel structure and avoids large errors during the manufacturing of each component. The flange connection positions of each component of the portal steel structure are manufactured together. The portal steel structure includes the main beam middle section 1, the main beam rigid leg side 2, the main beam flexible leg side 3, rigid leg one 4, rigid leg two 5, rigid leg three 6, flexible leg one 11, flexible leg two 12, hanger one 15, hanger two 16, and diagonal brace 19.

[0050] Step S1 includes the following steps:

[0051] S11: The main beam middle section 1, the main beam rigid leg side 2, and the main beam flexible leg side 3 are manufactured as a whole. The whole manufacturing method can ensure the straightness and accuracy of the main beam track.

[0052] S12: The flange plates of the rigid leg side 2 and the diagonal bracing of the rigid leg are combined with the flange plate of the diagonal bracing 19 to form the splicing flange body 6 20 and the splicing flange body 7 21. The rigid leg 1 4, the rigid leg 2 5 and the rigid leg 3 6 are assembled to form the rigid leg. That is, the flange plates at both ends of the diagonal bracing 19 are combined and manufactured on the flange plates of the rigid leg side 2 and the diagonal bracing of the rigid leg to form the splicing flange body 6 20 and the splicing flange body 7 21 on the rigid leg side 2 and the rigid leg of the main beam, respectively.

[0053] S13: The flange plates at the upper ends of rigid leg 1 4 and rigid leg 3 6 are combined with the flange plate of the rigid leg side 2 of the main beam to form a splicing flange body 1 8. The flange plates on the rigid leg side 2 of the main beam are combined and manufactured on the flange plates of rigid leg 1 4 and rigid leg 3 6, forming splicing flange bodies 1 8 at the upper ends of rigid leg 1 4 and rigid leg 3 6 respectively. The flange plates on the inner side of rigid leg 1 4 and rigid leg 3 6 are combined with the flange plate of rigid leg 2 5 to form splicing flange body 2 10. That is, the flange plates at both ends of rigid leg 2 5 are combined and manufactured on the flange plates of rigid leg 1 4 and rigid leg 3 6, so as to form splicing flange bodies 2 10 on the inner side of rigid leg 1 4 and rigid leg 3 6 respectively.

[0054] S14: The flange plates of flexible leg 11 and flexible leg 2 12 are combined to form the spliced ​​flange body 3 13. Then, flexible leg 11 and flexible leg 2 12 are manufactured as a whole in sections. The flexible leg 11 and flexible leg 2 12 are manufactured in three sections, which helps to ensure the dimensional accuracy of the manufacturing of flexible leg 11 and flexible leg 2 12. Specifically, it includes two inclined sections and an inverted "V" shaped section.

[0055] S15: The flange plates at the upper ends of hanger 15 and hanger 2 16 are combined with the flange plates on the flexible leg side 3 of the main beam to form a composite flange body 5 18, that is, the flange plates on the flexible leg side 3 of the main beam are combined and manufactured on the flange plates of hanger 15 and hanger 2 16, forming composite flange body 5 18 at the upper ends of hanger 15 and hanger 2 16 respectively; and the flange plates at the lower ends of hanger 15 and hanger 2 16 are combined to form composite flange body 4 17.

[0056] S2: After the gantry steel structure is manufactured in sections, check whether the dimensional accuracy of each component is qualified. Ensure that the dimensional accuracy of each component of the manufactured gantry steel structure meets the requirements of the assembled gantry steel structure before assembling the gantry steel structure as a whole, thereby ensuring the dimensional accuracy of the assembled gantry steel structure.

[0057] S3: After the dimensional accuracy of all components of the gantry steel structure has been inspected and approved, the gantry steel structure is assembled. The components are welded together, and then each component is cut and disassembled at the flange connection points. This method of assembling and then disassembling the gantry steel structure facilitates transportation to the construction site. Furthermore, the use of connecting plates 9 to assemble and fix the components ensures the dimensional accuracy of the gantry steel structure during manufacturing.

[0058] Step S3 includes the following steps:

[0059] S31: Assemble and weld the splicing flange 18 of rigid leg 1 and rigid leg 3 6 to the rigid leg side 2 of the main beam, and assemble and weld the splicing flange 210 of rigid leg 1 and rigid leg 3 6 to rigid leg 2 5; then cut and disassemble the splicing flange 18 and splicing flange 210 to achieve the disassembly of rigid leg 1 and rigid leg 3 6 from the rigid leg side 2 of the main beam, and the disassembly of rigid leg 1 and rigid leg 3 6 from rigid leg 2 5.

[0060] In step S31, rigid leg lower flanges 7 are assembled and welded to the lower ends of both rigid leg 4 and rigid leg 3. The rigid leg lower flanges 7 have a trimming allowance. Trimming is performed on the rigid leg lower flanges 7 to ensure their flatness, so as to connect to the traveling mechanism of the roller reclaimer. After the assembly of the flange body 2 10 of rigid leg 4 and rigid leg 3 6 with rigid leg 2 5 is completed, the roller bracket hinge holes are machined as a whole on rigid leg 2 5. The machining is symmetrical on the inclined portion of rigid leg 2 5 to ensure the accuracy of the roller bracket hinge hole machining, thereby ensuring the accuracy of the roller bracket installation.

[0061] S32: The segmented flexible leg 11 and flexible leg 2 12 are assembled and welded together, and then the assembly flange 3 13 is cut and disassembled. The two inclined sections and the inverted "V" shaped section are assembled and welded together to form a flexible leg, and then the assembly flange 3 13 is cut and disassembled to separate the flexible leg into flexible leg 11 and flexible leg 2 12.

[0062] In step S32, the flexible leg 11 and the flexible leg 2 are assembled and welded in three sections. The lower ends of the flexible leg 11 and the flexible leg 2 are both assembled and welded with flexible leg lower flanges 14. The flexible leg lower flanges 14 have a trimming allowance. The flexible leg lower flanges 14 are trimmed to ensure their flatness so as to connect to the traveling mechanism of the roller reclaimer.

[0063] S33: Assemble and weld the flange 5 18 of the splicing method for hanger 15 and hanger 2 16 to the flexible leg side 3 of the main beam, and assemble and weld hanger 15 and hanger 2 16 through the splicing flange 4 17. Then cut and disassemble the splicing flange 5 18 and splicing flange 4 17 to achieve the disassembly of hanger 15 and hanger 2 16 to the flexible leg side 3 of the main beam, as well as the disassembly of hanger 15 and hanger 2 16.

[0064] In step S33, after the flange body 5 18 of the splicing bracket 15 and the bracket 2 16 is assembled with the flexible leg side 3 of the main beam, the hinge holes of the roller bracket are integrally marked on the bracket 15 and the bracket 2 16. The hinge holes of the roller bracket are integrally marked on the lower part of the bracket 15 and the bracket 2 16 respectively. The hinge holes of the roller bracket are symmetrically marked on the inclined part of the rigid leg 2 5 to ensure the accuracy of the machining of the hinge holes of the roller bracket, thereby ensuring the accuracy of the installation of the roller bracket.

[0065] S34: Assemble and weld the diagonal brace 19 with the splicing flange 6 20 and splicing flange 7 21, and then cut and disassemble the splicing flange 6 20 and splicing flange 7 21 to achieve the disassembly of the diagonal brace 19 from the rigid leg side 2 of the main beam and the rigid leg.

[0066] In step S3, connecting plates 9 are used to mark holes in flanges 1-8, 2-10, 3-13, 4-17, 5-18, 6-20, and 7-21. After marking holes with connecting plates 9, hole matching is performed. Through holes are made on connecting plates 9. By placing connecting plates 9 on flanges 1-8, 2-10, 3-13, 4-17, 5-18, 6-20, and 7-21, and marking the corresponding positions of the through holes, mounting holes are then drilled at the marked locations. The purpose is to ensure that the through holes on connecting plates 9 correspond to the mounting holes on the various components of the gantry steel structure when assembling and fixing them using connecting plates 9, thus solving the problem of inconsistent dimensional accuracy of the gantry steel structure due to the connection of components by connecting plates 9.

[0067] Then, the main beam is cut and disassembled as a whole, including the middle section 1, the rigid leg side 2, and the flexible leg side 3. By cutting and disassembling the main beam as a whole, the disassembly of the portal steel structure is finally completed, forming eleven independent portal steel structure components.

[0068] S4: After completing the assembly and disassembly of the gantry steel structure, deliver the various components of the gantry steel structure to the construction site for assembly and fixing.

[0069] In step S4, after the various components of the gantry steel structure are delivered to the construction site, they can be assembled using connecting plates 9 and fixedly connected using fasteners. High-strength bolts are used as fasteners. Connecting plates 9 can be installed on both sides of the flange connection positions of each component of the gantry steel structure, and the fasteners are passed through through holes and mounting holes to achieve the assembly and fixation of the various components of the gantry steel structure.

[0070] The embodiments described above are merely preferred embodiments of the invention and are not intended to limit the scope of the invention. Therefore, any equivalent changes or modifications made to the technical solutions described in the claims of this invention should be included within the scope of the patent application of this invention.

Claims

1. A method for segmented manufacturing of the steel structure of a drum reclaimer gantry, characterized in that, Includes the following steps: S1: The portal steel structure is manufactured in sections, and the flange connection positions of each component of the portal steel structure are manufactured together. The portal steel structure includes the main beam middle section (1), the main beam rigid leg side (2), the main beam flexible leg side (3), rigid leg one (4), rigid leg two (5), rigid leg three (6), flexible leg one (11), flexible leg two (12), hanger one (15), hanger two (16) and diagonal brace (19). Step S1 The process includes the following steps: S11: The main beam middle section (1), the main beam rigid leg side (2), and the main beam flexible leg side (3) are manufactured as a whole; S12: The flange plates of the rigid leg side (2) of the main beam and the diagonal bracing flange of the rigid leg are combined with the flange plates of the diagonal bracing (19) to form the splicing flange body six (20) and splicing flange body seven (21). S13: The flange plates at the upper end of rigid leg one (4) and rigid leg three (6) are combined with the flange plate on the side of the rigid leg of the main beam (2) to form a splicing flange body one (8); and the flange plates on the inner side of rigid leg one (4) and rigid leg three (6) are combined with the flange plate of rigid leg two (5) to form a splicing flange body two (10). S14: The flange plates of flexible leg one (11) and flexible leg two (12) are combined to form a spliced ​​flange body three (13), and then flexible leg one (11) and flexible leg two (12) are manufactured as a whole in sections; S15: The flange plates at the upper ends of hanger one (15) and hanger two (16) are combined with the flange plates on the flexible leg side (3) of the main beam to form a splicing flange body five (18); and the flange plates at the lower ends of hanger one (15) and hanger two (16) are combined to form a splicing flange body four (17). S2: After the steel structure of the gantry is manufactured in sections, check whether the dimensional accuracy of each component is qualified; S3: After the dimensions and accuracy of each component of the gantry steel structure have been inspected and approved, the gantry steel structure is assembled. The components of the gantry steel structure are assembled and welded together. Then, the components of the gantry steel structure are cut and disassembled at the flange connection positions of each component. S4: After completing the assembly and disassembly of the gantry steel structure, deliver the various components of the gantry steel structure to the construction site for assembly and fixing.

2. The method for segmented manufacturing of the steel structure of a drum reclaimer gantry according to claim 1, characterized in that, Step S3 includes the following steps: S31: Assemble and weld the first (8) of the splicing flange of rigid leg one (4) and rigid leg three (6) to the side (2) of the rigid leg of the main beam, and assemble and weld the second (10) of the splicing flange of rigid leg one (4) and rigid leg three (6) to the second (5) of rigid leg; and then cut and disassemble the first (8) and the second (10) of the splicing flange. S32: The segmented flexible leg one (11) and flexible leg two (12) are assembled and welded together, and then the assembled flange body three (13) is cut and disassembled. S33: Assemble and weld the fifth (18) of the splicing flange of hanger one (15) and hanger two (16) to the flexible leg side (3) of the main beam, and assemble and weld hanger one (15) and hanger two (16) through the fourth (17) splicing flange, and then cut and disassemble the fifth (18) splicing flange and the fourth (17) splicing flange; S34: Assemble and weld the diagonal brace (19) with the six (20) and seven (21) of the splicing flange, and then cut and disassemble the six (20) and seven (21) of the splicing flange.

3. The method for segmented manufacturing of the steel structure of a drum reclaimer gantry according to claim 2, characterized in that, In step S31, rigid leg lower flanges (7) are assembled and welded at the lower ends of rigid leg one (4) and rigid leg three (6), and the rigid leg lower flanges (7) have a trimming allowance.

4. The method for segmented manufacturing of the steel structure of a drum reclaimer gantry according to claim 3, characterized in that, In step S31, after the assembly of the flange body 2 (10) of rigid leg 1 (4) and rigid leg 3 (6) with rigid leg 2 (5) is completed, the hinge hole of the roller bracket is drawn as a whole on rigid leg 2 (5).

5. A method for segmented manufacturing of the steel structure of a drum reclaimer gantry according to claim 2, characterized in that, In step S32, flexible leg one (11) and flexible leg two (12) are assembled and welded in three sections. Flexible leg lower flange (14) is assembled and welded at the lower end of both flexible leg one (11) and flexible leg two (12). Flexible leg lower flange (14) has a trimming allowance.

6. A method for segmented manufacturing of the steel structure of a drum reclaimer gantry according to claim 5, characterized in that, In step S33, after the assembly of the flange body five (18) of hanger one (15) and hanger two (16) with the flexible leg side (3) of the main beam is completed, the hinge holes of the roller bracket are drawn on hanger one (15) and hanger two (16).

7. A method for segmented manufacturing of the steel structure of a drum reclaimer gantry according to claim 2, characterized in that, In step S3, the connecting plate (9) is used to perform hole marking operations on the first (8), second (10), third (13), fourth (17), fifth (18), sixth (20) and seventh (21) of the splicing flanges respectively.

8. A method for segmented manufacturing of the steel structure of a drum reclaimer gantry according to claim 7, characterized in that, In step S3, after completing the drilling and marking operation using the connecting plate (9), the hole matching operation is then carried out; then the main beam of the main beam middle section (1), the main beam rigid leg side (2) and the main beam flexible leg side (3) are cut and disassembled as a whole.

9. A method for segmented manufacturing of the steel structure of a drum reclaimer gantry according to claim 8, characterized in that, In step S4, after the components of the gantry steel structure are delivered to the construction site, the components of the gantry steel structure are assembled by connecting plate (9) and fixedly connected by fasteners.

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