Manufacturing device for steel tube cylindrical structure

Abstract

The present application provides a manufacturing device for a steel tube cylindrical structure, comprising: a pedestal having a first groove with a concave surface in the shape of an arc; a rotating frame in the shape of a circular ring, having an outer surface matching the first groove of the pedestal, and also having an inner surface capable of accommodating the steel tube cylindrical structure; wherein the inner surface of the rotating frame is provided with a first boss protruding inwardly for supporting the first flange of the I-beam, and a limiting groove capable of accommodating the first steel tube is formed between two adjacent first bosses; a driving device arranged on the pedestal; and a welding device with adjustable height for welding the first flange and the second flange to the first steel tube.

Description

Technical Field

[0001] The present application belongs to the field of construction equipment and relates to a manufacturing device and a manufacturing method for a steel tube cylinder structure. Background Art

[0002] When manufacturing a large diameter cylinder, vertical welding and splicing are mainly used to complete the assembly of the large diameter cylinder. For example, Chinese application CN103157955A discloses a method for manufacturing a large diameter steel cylinder, which divides the entire cylinder into an upper plate unit with multiple plates and a lower plate unit with multiple plates. After the plates of the upper plate unit and the lower plate unit are spliced, the upper plate unit and the lower plate unit are spliced ​​in the vertical direction. This manufacturing method is complex and has many and high requirements for lifting equipment and mobile equipment. Summary of the invention

[0003] The present application provides a manufacturing device and a manufacturing method for a steel tube cylindrical structure. The manufacturing device is simple and the manufacturing method is convenient.

[0004] The first aspect of the present application provides a manufacturing device for a steel tube cylindrical structure, wherein the steel tube cylindrical structure comprises a plurality of first steel tubes and an I-beam connecting two adjacent first steel tubes, the I-beam having a mutually parallel first flange on the outer side and a second flange on the inner side, and a web connecting the first flange and the second flange, and the first flange and the second flange are respectively connected at both ends to the two adjacent first steel tubes; the plurality of first steel tubes and the plurality of I-beams connected therebetween surround the steel tube cylindrical structure; the manufacturing device comprises:

[0005] A pedestal having a first groove with a concave surface in the shape of an arc;

[0006] The rotating frame is annular; has an outer surface matching the first groove of the pedestal so that the rotating frame can rotate in the first groove; and has an inner surface capable of accommodating the steel tube cylindrical structure; wherein the inner surface of the rotating frame is provided with a first boss protruding inwardly for supporting the first flange of the I-beam, and a limiting groove capable of accommodating the first steel tube is formed between two adjacent first bosses;

[0007] A driving device, which is disposed on the base and is used to drive the rotating frame to rotate; and

[0008] The welding device is height-adjustable and is used for welding the second flange and the first steel pipe on the inner side of the rotating frame and for welding the first flange and the first steel pipe on the outer side of the rotating frame.

[0009] In some embodiments of the present application, the steel pipe cylindrical structure also includes a second steel pipe with a smaller diameter than the first steel pipe, a smaller number than the first steel pipe, and arranged at intervals on the steel pipe cylindrical structure, which is used to connect two adjacent first steel pipes to replace the I-beam between the two adjacent first steel pipes; the steel pipe cylindrical structure has both the I-beam and the second steel pipe; the inner surface of the rotating frame is also provided with a second boss protruding inward for supporting the second steel pipe, the second boss having a second arc-shaped groove matching the outer surface of the second steel pipe; the limiting groove is formed between the second boss and the adjacent first boss.

[0010] In some embodiments of the present application, the manufacturing device includes a plurality of rotating racks arranged at intervals, and gap zones are formed between adjacent rotating racks, and the first flange and the first steel pipe are welded in the gap zones. As an embodiment, the manufacturing device also includes a pushing device capable of axially moving the steel pipe cylindrical structure.

[0011] In some embodiments of the present application, the driving device includes a power gear set and a motor for driving the power gear set to rotate; wherein the power gear set includes a plurality of rotatable gears, which are respectively in contact with the outer surface of the rotating frame to drive the rotating frame to rotate.

[0012] In some embodiments of the present application, the manufacturing device includes a limiting device for limiting the falling off of the steel tube cylindrical structure. As an embodiment, the limiting device is a magnetic suction device installed in the rotating frame near the first boss, the second boss and the limit groove to magnetically attract the first steel tube, the second steel tube and the I-beam. As another embodiment, the limiting device is an L-shaped structure, the first end of which is hinged on the rotating frame, and the second end can extend into the gap formed by the first steel tube, the second steel tube or the first flange and the web to fix the first steel tube, the second steel tube or the I-beam.

[0013] In some embodiments of the present application, the manufacturing device further comprises a support frame, the support frame having two legs and a crossbeam between the two legs; the crossbeam is parallel to the axial direction of the first steel pipe; the welding device is movably arranged on the crossbeam. The support frame is detachable, and the height of the legs is adjustable so as to adjust the welding device to the inside or outside of the rotating frame.

[0014] In some embodiments of the present application, the limiting groove is a concave arc shape, matching the outer surface of the first steel pipe, and is used to limit the position of the first steel pipe. The motor is a stepping motor. The multiple rotating frames can rotate synchronously.

[0015] The second aspect of the present application provides a method for manufacturing a steel tube cylindrical structure, wherein the steel tube cylindrical structure includes a plurality of first steel tubes and an I-beam connecting two adjacent first steel tubes, the I-beam having a mutually parallel first flange on the outer side and a second flange on the inner side, and a web connecting the first flange and the second flange, and the two ends of the first flange and the second flange are respectively connected to the two adjacent first steel tubes; the manufacturing device includes: a pedestal having a first groove with a concave surface in the shape of an arc; a rotating frame, which is annular and has an outer surface matching the first groove of the pedestal, so that The rotating frame can rotate in the first groove and also has an inner surface capable of accommodating the steel tube cylindrical structure, wherein the inner surface of the rotating frame is provided with a first boss protruding inwardly for supporting the first flange of the I-beam, and a limiting groove capable of accommodating the first steel tube is formed between two adjacent first bosses; a driving device is provided on the pedestal for driving the rotating frame to rotate; and a welding device with adjustable height for welding the second flange and the first steel tube on the inner side of the rotating frame and welding the first flange and the first steel tube on the outer side of the rotating frame; the manufacturing method comprises the following steps:

[0016] Step A: placing the first steel pipe to be welded in the limiting groove at the lower part of the rotating frame; placing the I-beam to be welded on the first boss at the lower part of the rotating frame so that the first flange on the outer side contacts the first boss; at this time, the first flange and the two ends of the second flange of the I-beam are respectively close to the two adjacent first steel pipes;

[0017] Step B: Arrange the welding device on the inner side of the rotating frame, and weld the second flange on the inner side and the first steel pipe;

[0018] Step C: rotating the rotating frame, continuing to arrange the first steel pipe and the I-beam, repeating steps A and B, and completing the welding between the second flange and the first steel pipe;

[0019] Step D: Move the welding device to the outside of the rotating frame, rotate the rotating frame, and weld all the first flanges and the first steel pipes.

[0020] In some embodiments of the present application, the steel tube cylindrical structure also includes a second steel tube with a diameter smaller than the first steel tube, a number less than the first steel tube, and arranged at intervals on the steel tube cylindrical structure, which is used to connect two adjacent first steel tubes to replace the I-beam between the two adjacent first steel tubes; the steel tube cylindrical structure has both the I-beam and the second steel tube; the inner surface of the rotating frame is also provided with a second boss protruding inward for supporting the second steel tube, and the second boss has a second arc-shaped groove matching the outer surface of the second steel tube; the second boss is formed between the adjacent first bosses. The limiting groove is formed; the step A also includes arranging the second steel tube to be welded on the second boss at the lower part of the rotating frame, at which time the second steel tube is close to the two adjacent first steel tubes respectively; the step B also includes: welding the first steel tube and the second steel tube; the step C also includes continuing to arrange the second steel tube, repeating steps A and B, and completing the welding between the first steel tube and the second steel tube; the step D also includes performing supplementary welding between the first steel tube and the second steel tube from the outside of the rotating frame.

[0021] In some embodiments of the present application, the manufacturing device includes a plurality of rotating frames arranged at intervals and a pushing device capable of axially moving the steel tube cylindrical structure, and a gap zone is formed between adjacent rotating frames, and the first flange and the first steel tube are welded in the gap zone; in the step D, the first flange and the first steel tube located in the gap zone are first welded, and then the unwelded first flange and the first steel tube are moved to the gap zone for welding by using the pushing device.

[0022] In some embodiments of the present application, in step B, a limiting device is arranged to limit the falling off of the steel tube cylindrical structure. As an embodiment, the limiting device is a magnetic suction device installed in the rotating frame near the first boss, the second boss and the limit groove to magnetically attract the first steel tube, the second steel tube and the I-beam. As another embodiment, the limiting device is an L-shaped structure, the first end of which is hinged on the rotating frame, and the second end can extend into the gap formed by the first steel tube, the second steel tube or the first flange and the web to fix the first steel tube, the second steel tube or the I-beam.

[0023] In some embodiments of the present application, the manufacturing device further comprises a support frame, the support frame having two legs and a crossbeam between the two legs; the crossbeam is parallel to the axial direction of the first steel pipe; the welding device is movably arranged on the crossbeam. The support frame is detachable, and the height of the legs is adjustable. In the steps C and D, after the welding between the second flange and the first steel pipe is completed, the crossbeam located on the inner side of the rotating frame is disassembled, the height of the legs is adjusted, and then the crossbeam is installed on the outer side of the rotating frame.

[0024] Compared with the prior art, the beneficial effects of this application are:

[0025] The manufacturing device of the steel tube cylindrical structure provided in at least one embodiment of the present application can realize the precise positioning of the components and make all the welds face upward to become horizontal welds, effectively improving the welding efficiency and greatly improving the welding quality. At the same time, according to the steel tube cylindrical structure form, the rotating frame and the limiting groove structure can be set in a targeted manner to realize the welding manufacturing of various steel tube cylindrical structures, which is simple to operate and easy to mass produce.

[0026] The method for manufacturing a steel tube cylindrical structure provided in at least one embodiment of the present application can realize simple and convenient operation for the provided manufacturing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a steel tube cylinder structure in one embodiment;

[0028] Figure 2 is a schematic top view of a manufacturing device according to an embodiment;

[0029] Figure 3 is a schematic front view of a manufacturing device according to an embodiment;

[0030] Figure 4 yes Figure 3 AA view;

[0031] Figure 5 yes Figure 3 BB view;

[0032] Figure 6 is a schematic side view of a manufacturing device according to an embodiment;

[0033] Figure 7 is a partial schematic diagram of a manufacturing device according to an embodiment;

[0034] Figure 8 is a schematic diagram of the arrangement of a support frame in another embodiment;

[0035] Fig. 9 yes Figure 8 Enlarged view of the Q part;

[0036] Fig.10 yes Figure 8 A side view schematic diagram of

[0037] Numbers in the figure: 1 manufacturing device, 11 base, 111 first groove, 12 rotating frame, 121 outer surface, 122 inner surface, 1221 first boss, 1222 limiting groove, 1223 second boss, 13 power gear set, 14 gap belt, 15 magnetic device, 16 L-shaped structure, 17 welding device, 18 support frame, 181 support leg, 182 crossbeam; 2 steel tube cylindrical structure, 21 first steel tube, 22 I-beam, 221 first flange, 222 second flange, 223 web, 23 second steel tube. DETAILED DESCRIPTION

[0038] The technical solution of the present application is described in detail below in conjunction with specific implementations. However, it should be understood that without further description, the elements, structures and features in one implementation may also be beneficially combined with other implementations.

[0039] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0040] In the description of this application, it should be understood that the terms "upper", "lower", "bottom" and the like indicate positions or location relationships based on the attached Figure 1 and Figure 3 The orientation or position relationship shown is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. The "inside" and "outside" in the present application are mainly relative to the steel tube cylinder structure and the rotating frame, and the side close to the center of the circle is the inside, and the side away from the center of the circle is the outside.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] The first embodiment of the present application provides a manufacturing device 1 for a steel tube cylindrical structure (hereinafter referred to as a manufacturing device), wherein: Figure 1 , Figure 6 and Figure 7As shown, the steel tube cylindrical structure 2 includes a plurality of first steel tubes 21 and an I-beam 22 connecting two adjacent first steel tubes 21. The plurality of first steel tubes 21 and the plurality of I-beams 22 surround a substantially circular steel tube cylindrical structure 2. The I-beam 22 has a first flange 221 on the outer side and a second flange 222 on the inner side that are substantially parallel to each other, and a web 223 that substantially vertically connects the first flange 221 and the second flange 222, and the two ends of the first flange 221 and the second flange 222 are respectively connected to the two adjacent first steel tubes 21.

[0043] like Figure 2-10 As shown, the manufacturing device 1 includes a base 11 and a rotating frame 12 located on the base 11. The base 11 serves as the base of the entire manufacturing device and has a first groove 111 with an arc-shaped concave surface. The rotating frame 12 is annular and is located in the first groove 111. The outer surface 121 of the rotating frame 12 matches the concave surface of the first groove 111, so that the rotating frame 12 can be installed in the first groove 111 and can rotate relative to the first groove 111. Figure 5 As shown, the rotating frame 12 also has an inner surface 122 capable of accommodating the steel tube cylindrical structure 2; wherein, the inner surface 122 is provided with a first boss 1221 protruding inward for supporting the first flange 221 of the I-beam 22; a limiting groove 1222 capable of accommodating the first steel tube 21 is formed between two adjacent first bosses 1221; the limiting groove 1222 is a concave arc shape, which matches the outer surface of the first steel tube 21 and is used to limit the position of the first steel tube 21.

[0044] The pedestal 11 is provided with a driving device for driving the rotating frame 12 to rotate. In one embodiment, the driving device includes a power gear set 13 and a motor (not shown in the figure); Figure 5 and Figure 6 As shown, the power gear set 13 includes a plurality of rotatable gears, which are respectively in contact with the outer surface 121 of the rotating frame 12, and are used to drive the rotation of the rotating frame 12; the motor is used to drive the power gear set 13 to rotate, so as to further rotate the rotating frame 12. The motor can be selected as a stepping motor, so as to accurately control the synchronous rotation of the power gear set 13.

[0045] In one embodiment, if Figure 2 and Figure 3As shown, the manufacturing device 1 includes a plurality of rotating frames 12 spaced apart on a pedestal 11; a gap band 14 is formed between adjacent rotating frames 12, wherein the length L1 of the gap band 14 in the axial direction is greater than the length L2 of the rotating frame 12 in the axial direction, so as to facilitate welding of the exposed first flange 221 in the gap band 14. When there are a plurality of rotating frames 12, the manufacturing device 1 includes a plurality of power gear sets 13 corresponding to the rotating frames 12, which are used to drive the rotation of each rotating frame 12 respectively. A synchronous control system can be provided to control the synchronous rotation of each power gear set 13, so that the rotation steps of each rotating frame 12 are consistent, thereby preventing the steel tube cylindrical structure 2 located in the rotating frame 12 from being twisted. Figure 2 and Figure 3 The figure shows a case where there are three rotating racks 12 and three power gear sets 13, which are arranged in one-to-one correspondence; Figure 5 and Figure 6 The case where each power gear set 13 has five rotating gears is shown. It is worth noting that in practical applications, more or less rotating frames 12, power gear sets 13 and the number of gears can be flexibly set according to the length and weight of the steel tube cylindrical structure 2. In addition, if multiple rotating frames 12 are arranged at intervals on the same pedestal 11, then only one axially arranged power gear set 13 can be set on the pedestal 11 to drive multiple rotating frames 12 to move synchronously at the same time.

[0046] The manufacturing device 1 also includes a limiting device that limits the steel tube cylindrical structure from falling off. In one embodiment, Figure 6 As shown, the limiting device is a magnetic attraction device 15 installed in the rotating frame 12, which can be an electromagnet or a permanent magnet. It is adapted to a circle of the rotating frame 12 and is arranged in an annular shape, close to the inner surface 122 of the rotating frame 12, especially close to the first boss 1221 and the limiting groove 1222. By magnetically attracting the first steel pipe 21 and the I-beam 22 of the steel pipe cylindrical structure, the first steel pipe 21 and the I-beam 22 will not fall off due to gravity even if they are rotated to the top of the rotating frame 12 after the inner surface is welded. In another embodiment, as Figure 8 and Fig. 9 As shown, the limiting device is an L-shaped structure 16, whose first end 161 is hinged on the rotating frame 12, and whose second end 162 can extend into the first steel pipe 21 or into the gap formed by the first flange 221 and the web 223, and the first steel pipe 21 or the I-beam 22 is hooked on the rotating frame 12 through the second end 162 to prevent it from falling off (such as Fig. 9 (shown by the dashed line).

[0047] Furthermore, if Figure 2-6As shown, the manufacturing device 1 also includes a welding device 17 for welding the steel tube cylindrical structure, mainly including welding between the first steel tube 21 and the first flange 221 and the second flange 222 of the I-beam 22 respectively.

[0048] In order to realize automated welding, the manufacturing device 1 further includes a support frame 18, which has two legs 181 and a crossbeam 182 located between the legs 181. The crossbeam 182 is longer than the first steel pipe 21 and is substantially parallel to the axial direction of the first steel pipe 21. The welding device 17 is movably arranged on the crossbeam 182, for example, a slide rail is arranged between the welding device 17 and the crossbeam 182, so that the welding device 17 can slide along the axial direction of the first steel pipe 21 to perform continuous welding and form a horizontal weld.

[0049] The support frame 18 is detachable, and its legs 181 can be raised and lowered, so that the steel tube cylindrical structure can be welded on both sides of the inner side of the rotating frame 12 and the outer side of the rotating frame 12. The support frame 18 can be first arranged on the inner side of the rotating frame, such as Figure 3-6 As shown, the second flange 222 and the first steel pipe 21 located below the crossbeam 182 are first welded; after the inner side welding is completed, the support frame 18 is disassembled and set to the outer side of the top of the rotating frame, as shown in FIG. Figure 8 and Fig.10 As shown, the first flange 221 and the first steel pipe 21 below the support frame 18 are welded.

[0050] The manufacturing device 1 also includes a pushing device (not shown in the figure) capable of axially moving the steel tube cylindrical structure, such as a jack installed along the axial direction of the steel tube cylindrical structure, which can contact one end of the steel tube cylindrical structure to axially push the steel tube cylindrical structure to move. After the inner second flange 222 or part of the second flange 222 is welded, the first steel tube 21 and the part of the first flange 221 located in the gap zone 14 can be welded in the gap zone 14 first; the part blocked by the rotating frame 12 cannot be welded, and then the steel tube cylindrical structure can be axially pushed so that the unwelded part is moved into the gap zone 14 for welding.

[0051] In another embodiment, if Figure 1 , Figure 6 and Figure 7As shown, the steel tube cylindrical structure 2 also includes a second steel tube 23, which has a smaller diameter than the first steel tube 21 and a smaller number than the first steel tube 21, and is arranged at intervals on the steel tube cylindrical structure 2, and is used to connect two adjacent first steel tubes 21 to replace the I-beam 22 there. The steel tube cylindrical structure 2 has both the I-beam 22 and the second steel tube 23; the center of the first steel tube, the center of the second steel tube and the center of the I-beam (web) are located on the same circumference of the steel tube cylindrical structure 2. The second steel tube 23 has an extension 231 that is longer than the first steel tube 21 and the I-beam 22. Based on this, the inner surface 122 of the manufacturing device 1 is also provided with a second boss 1223 protruding inwardly for supporting the second steel tube 23, which has a second arc-shaped groove matching the outer surface of the second steel tube 23. The limiting groove 1222 is formed between the second boss 1223 and the adjacent first boss 1221.

[0052] A second embodiment of the present application provides a method for manufacturing a steel tube cylindrical structure, which can adopt the manufacturing device described in any of the above embodiments, and includes the following steps:

[0053] Step A: Figure 7 As shown, the first steel pipe 21 before welding is arranged in the limiting groove 1222 at the lower part of the rotating frame 12; the I-beam 22 before welding is arranged on the first boss 1221 at the lower part of the rotating frame 12, so that the first flange 221 on the outer side contacts the first boss 1221; at this time, the first flange 221 and the second flange 222 of the I-beam are respectively close to the two adjacent first steel pipes at both ends.

[0054] Step B: Arrange the welding device 17 on the inner side of the rotating frame 12, and weld the second flange 222 on the inner side to the first steel pipe 21. Arrange a limiting device, such as turning on the switch of the electromagnet or pulling the second end of each L-shaped structure 16 to extend into the first steel pipe 21 and into the gap formed by the first flange 221 and the web 223, to limit the falling off of the steel pipe cylindrical structure.

[0055] Step C: Rotate the rotating frame 12 , continue to arrange the first steel pipe 21 and the I-beam 22 , repeat steps A and B, and complete the welding between the second flange 222 and the first steel pipe 21 .

[0056] Step D: Move the welding device 17 to the outside of the rotating frame 12 , rotate the rotating frame 12 , and weld all the first flanges 221 and the first steel pipes 21 .

[0057] Furthermore, in step D, the first flange 221 and the first steel tube 21 located in the gap zone 14 are first welded, and then the unwelded first flange 221 and the first steel tube 21 are moved into the gap zone 14 by a pushing device to complete the welding of the first flange 221 and the first steel tube 21.

[0058] In one embodiment, when the steel tube cylindrical structure 2 includes a second steel tube 23, step A also includes arranging the second steel tube 23 before welding on the second boss 1223 at the lower part of the rotating frame 12, and at this time, the second steel tube 23 is respectively close to two adjacent first steel tubes; step B also includes: welding the first steel tube 21 and the second steel tube 23; step C also includes continuing to arrange the second steel tube 23, repeating steps A and B, and completing the welding between the first steel tube 21 and the second steel tube 23; step D also includes performing additional welding between the first steel tube 21 and the second steel tube 23 from the outside of the rotating frame 12.

[0059] The order of the steps described in this embodiment is merely a description order, and in actual operation, it can be adjusted according to actual needs. Therefore, the description order does not constitute an absolute limitation to the present application.

[0060] The described implementation mode is only a description of the preferred implementation mode of the present application, and does not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements made to the technical solution of the present application by ordinary technicians in this field should fall within the protection scope determined by the claims of the present application.

Claims

1. A manufacturing device for a steel tube cylindrical structure, characterized in that: The steel tube cylindrical structure includes a plurality of first steel tubes and an I-beam connecting two adjacent first steel tubes, wherein the I-beam has a first flange on the outer side and a second flange on the inner side which are parallel to each other, and a web connecting the first flange and the second flange, and both ends of the first flange and the second flange are respectively connected to the two adjacent first steel tubes; The plurality of first steel pipes and the plurality of I-beams connected therebetween surround the steel pipe cylindrical structure; the manufacturing device comprises: A pedestal having a first groove with a concave surface in the shape of an arc; The rotating frame is annular; has an outer surface matching the first groove of the pedestal so that the rotating frame can rotate in the first groove; and has an inner surface capable of accommodating the steel tube cylindrical structure; wherein the inner surface of the rotating frame is provided with a first boss protruding inwardly for supporting the first flange of the I-beam, and a limiting groove capable of accommodating the first steel tube is formed between two adjacent first bosses; A driving device, which is disposed on the base and is used to drive the rotating frame to rotate; and The welding device is height-adjustable and is used for welding the second flange and the first steel pipe on the inner side of the rotating frame and for welding the first flange and the first steel pipe on the outer side of the rotating frame.

2. The manufacturing device of the steel tube cylindrical structure according to claim 1, characterized in that: The steel tube cylindrical structure also includes a second steel tube with a smaller diameter than the first steel tube, a less number than the first steel tube, and arranged at intervals on the steel tube cylindrical structure, which is used to connect two adjacent first steel tubes to replace the I-beam between the two adjacent first steel tubes; the steel tube cylindrical structure has both the I-beam and the second steel tube; the inner surface of the rotating frame is also provided with a second boss protruding inward for supporting the second steel tube, the second boss has a second arc-shaped groove matching the outer surface of the second steel tube; the limiting groove is formed between the second boss and the adjacent first boss.

3. The manufacturing device of the steel tube cylindrical structure according to claim 1 or 2, characterized in that: It also includes a plurality of rotating frames arranged at intervals, wherein gap zones are formed between adjacent rotating frames, and the first flange and the first steel pipe are welded in the gap zones.

4. The manufacturing device of the steel tube cylindrical structure according to claim 3, characterized in that: It also includes a driving device capable of axially moving the steel tube cylindrical structure.

5. The manufacturing device of the steel tube cylindrical structure according to claim 4, characterized in that: The driving device includes a power gear set and a motor for driving the power gear set to rotate; wherein the power gear set includes a plurality of rotatable gears, which are respectively in contact with the outer surface of the rotating frame to drive the rotating frame to rotate.

6. The manufacturing device of the steel tube cylindrical structure according to claim 1 or 2, characterized in that: It also includes a limiting device for limiting the falling off of the steel tube cylinder structure.

7. The manufacturing device of the steel tube cylindrical structure according to claim 6, characterized in that: The limiting device is a magnetic attraction device installed in the rotating frame close to the first boss and the limiting groove to magnetically attract the first steel pipe and the I-beam.

8. The manufacturing device of the steel tube cylindrical structure according to claim 6, characterized in that: The limiting device is an L-shaped structure, a first end of which is hinged on the rotating frame, and a second end of which can extend into the gap formed by the first steel pipe or the first flange and the web to fix the first steel pipe or the I-beam.

9. The manufacturing device of the steel tube cylindrical structure according to claim 1 or 2, characterized in that: It also includes a support frame having two legs and a crossbeam located between the two legs; the crossbeam is parallel to the axial direction of the first steel pipe; the welding device is movably arranged on the crossbeam; the support frame is detachable, and the height of the legs is adjustable to adjust the welding device to the inside or outside of the rotating frame.

10. The manufacturing device of the steel tube cylindrical structure according to claim 5, characterized in that: The limiting groove is in a concave arc shape, matches the outer surface of the first steel pipe, and is used to limit the position of the first steel pipe; the motor is a stepping motor; and the multiple rotating frames can rotate synchronously.

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