Quick positioning and assembling structure of steel pipe structure flange of steel pipe composite tower

Abstract

This invention discloses a rapid positioning and assembly structure for steel pipe composite tower flanges, relating to the technical field of steel pipe composite towers. It includes an upper flange steel pipe, a lower flange steel pipe, a lower pad, an upper pad, and locking strips. When the upper flange steel pipe presses down on the upper pad, the upper pad oscillates circumferentially to allow the locking strips to engage with the corresponding flange. Simultaneously, the inner wall of the upper flange steel pipe is adaptively tightened to maintain coaxiality with the upper pad, and the upper and lower pads cooperate to align the bolt holes of the upper and lower connecting flanges. In this invention, by setting an upper and lower pad with locking strips and grooves between the upper and lower connecting flanges, when the upper flange steel pipe is pressed down, the upper pad can be driven to oscillate circumferentially, automatically guiding the locking strips to engage with the corresponding flange grooves, thereby forcibly aligning the bolt holes of the upper and lower connecting flanges. This completely replaces the traditional manual method of using pry bars and punches to forcibly align the holes, ensuring extremely high alignment accuracy.

Description

Technical Field

[0001] This invention relates to the field of steel pipe composite tower technology, specifically to a rapid positioning and assembly structure for steel pipe structural flanges in a steel pipe composite tower. Background Technology

[0002] Composite steel pipe towers (or steel pipe composite towers) are lattice-type tower structures widely used in overhead transmission lines. Their main material is usually assembled from multiple sections of flanged steel pipes using high-strength bolts.

[0003] During the hoisting and assembly of steel pipe composite towers, bolt hole misalignment is highly likely to occur when the flanges of the upper and lower steel pipe sections are joined. Current technology typically addresses this issue by manually aligning the bolt holes. For example, workers must climb to a high position and use a crowbar to pry open the flange edge or strike a punch (locating pin) to forcibly align the bolt holes. This traditional method has the following drawbacks: first, working at height poses extremely high safety risks, and the striking action can easily cause injury or flange damage; second, adjusting the misaligned holes is time-consuming, severely restricting the overall hoisting efficiency of the steel pipe tower; and third, it relies excessively on worker experience, making it difficult to guarantee the accuracy of the alignment, which is detrimental to improving the assembly quality of the transmission tower. Summary of the Invention

[0004] The purpose of this invention is to provide a quick positioning and assembly structure for the steel pipe structure flange of a steel pipe composite tower, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a quick positioning and assembly structure for steel pipe composite tower flanges, comprising an upper flange steel pipe and a lower flange steel pipe respectively equipped with connecting flanges, wherein the lower flange steel pipe is provided with a lower pad plate that adaptively tightens with its inner wall to maintain coaxiality, and the lower pad plate is provided with an upper pad plate that can reciprocate along the circumferential direction. Both the upper and lower pads are provided with locking strips for engaging and positioning with the corresponding flanges. When the upper flange steel pipe presses down on the upper pad, the upper pad swings circumferentially to allow the locking strips to engage with the corresponding flange. At the same time, the inner wall of the upper flange steel pipe is adaptively tightened to maintain coaxiality with the upper pad, and the upper and lower pads cooperate to guide and align the bolt holes of the upper and lower connecting flanges.

[0006] Furthermore, a first cylindrical sleeve is inserted into the lower flange steel pipe, and the lower pad is fixed to the upper end of the first cylindrical sleeve. The periphery of the first cylindrical sleeve is provided with a first variable diameter slit that divides its lower side into multiple first elastic petals, and a first ball bearing is provided on the outer side of the first elastic petal. A sliding column is slidably provided inside the first cylindrical sleeve. The lower end of the sliding column is provided with a first cone head. The lower end of the first cylindrical sleeve is provided with a first cone hole that mates with the first cone head. When the sliding column slides down, the first cone head squeezes the first elastic flap to open it, so that the first ball rolls into contact with the inner wall of the lower flange steel pipe.

[0007] Furthermore, a second cylindrical sleeve is coaxially fixed to the lower pad, and an expansion sleeve is fixed to the upper end of the second cylindrical sleeve. The periphery of the expansion sleeve is provided with a second variable diameter slit that divides it into multiple second elastic valves, and a second ball bearing is provided on the outer side of the second elastic valve. The upper end of the sliding column is provided with a pull rod, the upper end of the pull rod is provided with a second cone head, and the upper end of the expansion sleeve is provided with a second cone hole that cooperates with the second cone head. When the sliding column slides down, the second cone head squeezes the second elastic flap to open it, so that the second ball rolls into contact with the inner wall of the upper flange steel pipe.

[0008] Furthermore, the upper pad is slidably sleeved on the second cylindrical sleeve, and a connecting pin is fixedly connected to the upper side of the sliding column. The connecting pin passes through the second cylindrical sleeve and is fixedly connected to the upper pad. The periphery of the second cylindrical sleeve is provided with an irregularly shaped groove for the connecting pin to slide. The irregularly shaped groove includes a serpentine groove and a straight groove that are connected. When the connecting pin slides downward in the serpentine groove, it drives the upper pad to swing back and forth in the circumferential direction.

[0009] Furthermore, the outer wall of the lower flange steel pipe is provided with a clamp, the clamp is provided with a support arm, the outer edge of the upper pad is provided with a support plate, a limiting post is provided between the support arm and the support plate, and a return spring is fitted on the limiting post. The two ends of the return spring elastically abut against the support arm and the support plate respectively, so as to provide an upward return preload force for the upper pad.

[0010] Furthermore, the clamp is a split structure, with a connecting block at the separated end of the clamp, and the two connecting blocks are detachably connected by connecting screws.

[0011] Furthermore, the bottom surface of the lower pad abuts against the top surface of the lower connecting flange, and the retaining strip on the bottom surface of the lower pad engages with the retaining groove on the top surface of the lower connecting flange for positioning. The top surface of the upper pad abuts against the bottom surface of the upper connecting flange, and the retaining strip on the top surface of the upper pad engages with the retaining groove on the bottom surface of the upper connecting flange for positioning.

[0012] Furthermore, both the upper and lower pads are provided with through holes corresponding to the flange bolt holes. When the surfaces of the upper and lower pads abut against each other, the upper and lower pads serve as buffer pads between the upper and lower connecting flanges.

[0013] Furthermore, the outer diameter of the first cylindrical sleeve is smaller than the inner diameter of the lower flange steel pipe, the inner cavities of the first cylindrical sleeve and the second cylindrical sleeve are connected and have the same inner diameter, and the sliding column slides freely up and down in the inner cavities of the first cylindrical sleeve and the second cylindrical sleeve.

[0014] Furthermore, the first variable diameter slot is connected to the first tapered hole, the outer diameter of the first tapered head decreases from top to bottom, the outer diameter of the second tapered head decreases from top to bottom, and the inner diameter of the second tapered hole decreases from top to bottom.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by setting an upper and lower pad with retaining strips and grooves between the upper and lower connecting flanges, when the upper flange steel pipe is pressed down, the upper pad can be driven to oscillate circumferentially, automatically guiding the retaining strips to engage in the corresponding flange grooves, thereby forcibly aligning the bolt holes of the upper and lower connecting flanges. This completely replaces the traditional method of manually using pry bars and punches to forcibly align the holes, ensuring extremely high hole alignment accuracy. 2. In this invention, the entire alignment and positioning process is automatically completed by the mechanical structure during the descent of the steel pipe. Workers do not need to climb to a high place to pry or knock, which fundamentally eliminates safety hazards such as falls from heights and mechanical injuries. 3. In this invention, the self-weight of the steel pipe lowered by the hoisting equipment is used as the power source, and "automatic centering + circumferential rotation alignment + hole alignment" can be completed in one go within a very short descent stroke, which greatly shortens the splicing time of a single steel pipe section and effectively improves the overall hoisting and construction efficiency of the steel pipe composite tower. 4. In this invention, the cooperation between the conical heads (first conical head and second conical head) and the conical holes (first conical hole and second conical hole) allows the first and second elastic petals to be simultaneously squeezed as the sliding column moves downward, causing the balls to be respectively supported and rolled into contact with the inner walls of the upper flange steel pipe and the lower flange steel pipe. This design not only eliminates the coaxiality error during the pre-assembly of the lower pad plate and the lower flange steel pipe, but also automatically corrects the tilt deviation during the hoisting of the upper flange steel pipe, achieving a high coaxiality connection between the upper and lower steel pipes and avoiding stress concentration at the flange connection. 5. In this invention, the clamps, return springs and limit posts used to provide the reset pre-tightening force adopt a split and detachable design. After the upper flange steel pipe and the lower flange steel pipe are bolted, they can be easily disassembled and transferred to the next base tower for reuse, which improves the utilization rate of the tooling and has good economic benefits. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a quick positioning and assembly structure for a steel pipe composite tower flange in this invention. Figure 2 for Figure 1 Schematic diagram of the positional relationship of the structure after explosive decomposition; Figure 3 for Figure 1 A schematic diagram of the positional relationship of the central structure from a first-person perspective; Figure 4 for Figure 1 A schematic diagram of the positional relationship of the middle structure from a second perspective; Figure 5 for Figure 1 A schematic diagram showing the positional relationship of the upper flange steel pipe and the lower flange steel pipe, omitting the above diagram. Figure 6 for Figure 5 A schematic diagram of the positional relationship of the central structure from a first-person perspective; Figure 7 for Figure 5 A schematic diagram of the positional relationship of the middle structure from a second perspective; Figure 8 for Figure 5 Schematic diagram of the positional relationships of the central structure after explosive decomposition; Figure 9 for Figure 7 A schematic diagram showing the positional relationship of the middle section after it has been cut open. Figure 10 This is a schematic diagram showing the positional relationship of the upper pad, sliding column, and tie rod after assembly in this invention.

[0017] The following are the annotations for each item in the figure: 1. Upper flange steel pipe; 2. Upper connecting flange; 3. Limiting post; 4. Second cylindrical sleeve; 5. Serpentine groove; 6. Return spring; 7. Lower connecting flange; 8. Clamp; 9. Connecting block; 10. Lower flange steel pipe; 11. Connecting screw; 12. Support arm; 13. Lower pad; 14. Straight groove; 15. Upper pad; 16. Slot; 17. Second cone head; 18. Tie rod; 19. Second ball bearing; 20. Second diameter reducing joint; 21. Expansion sleeve; 22. First cylindrical sleeve; 23. First ball bearing; 24. First diameter reducing joint; 25. Locking strip; 26. Second cone hole; 27. First cone hole; 28. Sliding post; 29. ​​First cone head; 30. Connecting pin. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-10This invention provides a technical solution: a quick positioning and assembly structure for a steel pipe composite tower, comprising two flanged steel pipes, defined from top to bottom as an upper flanged steel pipe 1 and a lower flanged steel pipe 10. The upper flanged steel pipe 1 and the lower flanged steel pipe 10 are installed opposite each other. The upper flanged steel pipe 1 is hoisted above the lower flanged steel pipe 10 using external hoisting equipment. An upper connecting flange 2 and a lower connecting flange 7 are coaxially welded to the opposite ends of the upper flanged steel pipe 1 and the lower flanged steel pipe 10, respectively. A first cylindrical sleeve 22 is inserted into the lower flanged steel pipe 10. The first cylindrical sleeve 22... A lower pad 13 is coaxially fixed to the end. The outer diameter of the first cylindrical sleeve 22 is smaller than the inner diameter of the lower flange steel pipe 10. In addition, the bottom surface of the lower pad 13 abuts against the top surface of the lower connecting flange 7, and multiple clips 25 are fixed to the bottom surface of the lower pad 13. The top surface of the lower connecting flange 7 is provided with a slot 16 for the clips 25 to be engaged. The first cylindrical sleeve 22 is pre-inserted into the lower flange steel pipe 10, and the clips 25 on the lower pad 13 are engaged in the slot 16. At this time, the lower pad 13 and the lower flange steel pipe 10 are coaxially connected. In addition, the bolt holes on the lower connecting flange 7 of the lower flange steel pipe 10 and the bolt holes on the lower pad 13 are in a one-to-one correspondence. Combination Figures 1 to 10 As shown, and please refer to the following: Figure 2 A second cylindrical sleeve 4 is coaxially fixed to the top of the lower pad 13. An expansion sleeve 21 is integrally fixed to the upper end of the second cylindrical sleeve 4. The expansion sleeve 21 and the second cylindrical sleeve 4 are coaxially connected. A plurality of first ball bearings 23 are rotatably embedded on the lower side of the periphery of the first cylindrical sleeve 22. A plurality of first diameter-changing slots 24 penetrating the wall surface are opened on the periphery of the first cylindrical sleeve 22. The first diameter-changing slots 24 are arranged in an array along the axial direction of the first cylindrical sleeve 22. The first diameter-changing slots 24 divide the lower periphery of the first cylindrical sleeve 22 into a plurality of first elastic petals. The first elastic petals can produce elastic expansion deformation when subjected to a force in the radial outward direction of the first cylindrical sleeve 22. An upper pad that can slide freely up and down is fitted on the periphery of the second cylindrical sleeve 4. Plate 15, upper pad 15 and lower pad 13 are used together. When the surfaces of the two are in contact, they can be used as a buffer pad between the upper connecting flange 2 and the lower connecting flange 7 to avoid stress concentration at the connection between the upper connecting flange 2, the lower connecting flange 7 and the upper flange steel pipe 1, the lower flange steel pipe 10. The upper pad 15 is also provided with bolt holes so that when the surfaces of the lower pad 13 and the lower connecting flange 7 are in contact, the surfaces of the upper pad 15 and the lower pad 13 are in contact, and the surfaces of the upper flange steel pipe 1 and the upper pad 15 are in contact, bolts can be passed through the bolt holes on the upper flange steel pipe 1, the upper pad 15, the lower pad 13 and the lower flange steel pipe 10 in sequence, so that the upper flange steel pipe 1 and the lower flange steel pipe 10 can be connected together. Combination Figures 1 to 10 As shown, and please refer to the following: Figure 2 , Figure 5 and Figure 9 The expansion sleeve 21 has multiple second diameter-changing slots 20 around its periphery, arranged in an array along the axial direction of the second cylindrical sleeve 4. Similarly, the second diameter-changing slots 20 divide the periphery of the second cylindrical sleeve 4 into multiple second elastic flaps. When subjected to a force along the radial outward direction of the second cylindrical sleeve 4, the second elastic flaps can elastically expand and deform. Multiple second ball bearings 19 are rotatably embedded around the periphery of each second elastic flap. The lower end of the first cylindrical sleeve 22 has a first conical hole 27, which communicates with the inner cavity of the first cylindrical sleeve 22 and with the first diameter-changing slot 24. The inner diameter of the first conical hole 27 decreases sequentially from top to bottom. The end face of the upper pad 15 is coaxially... A sliding hole is provided for the second cylindrical sleeve 4 to pass through freely. The inner cavities of the first cylindrical sleeve 22 and the second cylindrical sleeve 4 are in a through state. In addition, the inner diameter of the two cavities is the same. A sliding column 28 is installed in both the first cylindrical sleeve 22 and the second cylindrical sleeve 4. The sliding column 28 can slide freely up and down in the inner cavities of the first cylindrical sleeve 22 and the second cylindrical sleeve 4. A first cone head 29 is fixedly connected to the lower end of the sliding column 28. The outer diameter of the first cone head 29 decreases from top to bottom and matches the first cone hole 27. A connecting pin 30 is fixedly fixed horizontally to the upper side of the sliding column 28. The connecting pin 30 passes through the second cylindrical sleeve 4, and one end of the connecting pin 30 that passes through the second cylindrical sleeve 4 is fixedly connected to the wall of the sliding hole of the upper pad plate 15. Combination Figures 1 to 10 As shown, and please refer to the following: Figure 2 , Figure 5 , Figure 9 and Figure 10 The upper pad 15 also has multiple retaining strips 25 fixedly attached to its upward-facing side, and the lower end face of the upper connecting flange 2 also has a retaining groove 16 that mates with the retaining strips 25. A pull rod 18 is coaxially fixedly attached to the upper end face of the sliding column 28, and a second cone 17 is coaxially fixedly attached to the upper end of the pull rod 18. The outer diameter of the second cone 17 decreases sequentially from top to bottom. Additionally, a second conical hole 26 is provided at the upper end of the expansion sleeve 21 to mate with the second cone 17. The inner diameter of the second conical hole 26 is... The dimensions decrease from top to bottom. The periphery of the second cylindrical sleeve 4 is provided with an irregularly shaped groove for the connecting pin 30 to pass freely. The irregularly shaped groove includes a serpentine groove 5 and a straight groove 14 from top to bottom. The connecting pin 30 can slide freely in the serpentine groove 5 and the straight groove 14. When the connecting pin 30 slides downward in the serpentine groove 5, since the outer contour of the serpentine groove 5 is serpentine, the connecting pin 30 will be able to drive the upper pad 15 to swing back and forth in the circumferential direction when it slides in the serpentine groove 5. When the upper pad 15 slides downwards on the periphery of the second cylindrical sleeve 4, it drives the sliding column 28 to slide downwards, allowing the first cone head 29 to engage in the first cone hole 27 and the second cone head 17 to engage in the second cone hole 26. As the sliding column 28 slides downwards, the first cone head 29 compresses the first elastic flap on the first cylindrical sleeve 22, causing the first elastic flap on the first cylindrical sleeve 22 to elastically expand and deform, allowing the first ball bearing 23 to roll and contact the lower flange steel pipe 10. The inner cavity allows the lower pad 13 to automatically be coaxial with the lower flange steel pipe 10, thus avoiding the error in the coaxiality of the lower flange steel pipe 10 and the lower pad 13 caused by the assembly error of the clip 25 and the slot 16. At the same time, the second cone 17 exerts a squeezing force on the inner wall of the second cone hole 26, causing the second elastic petal on the expansion sleeve 21 to also elastically expand and deform, so that the second ball 19 on the second elastic petal also rolls and contacts the inner wall of the upper flange steel pipe 1, thus making the upper flange steel pipe 1 and the second cylindrical sleeve 4 coaxial. Combination Figures 1 to 10 As shown, and please refer to the following: Figure 1 and Figure 5 A clamp 8 is installed on the periphery of the lower flange steel pipe 10. A connecting block 9 is fixed to the separated end of the clamp 8. The two connecting blocks 9 are connected by connecting screws 11. Two support arms 12 are welded on the clamp 8. Two support plates are welded on the periphery of the upper pad 15. Limiting posts 3 are vertically inserted through the support arms 12 and the support plates. A return spring 6 is installed on the support plate. The two ends of the return spring 6 elastically abut against the support arms 12 and the support plates respectively. The two ends of the return spring 6 elastically wrap around the corresponding two limiting posts 3 respectively. In the initial state, the return spring 6 has an upward elastic abutting force on the support plates, thereby causing the upper pad 15 to move upward.

[0020] Working principle of the invention: External hoisting equipment hoists the upper flange steel pipe 1 above the lower flange steel pipe 10, and then slowly lowers the upper flange steel pipe 1 so that it can be fitted into the expansion sleeve 21 until the bottom of the upper flange steel pipe 1 contacts the top of the upper pad 15. At this time, the locking strip 25 on the upper pad 15 may not be engaged in the locking groove 16 of the upper connecting flange 2. Then, as the upper flange steel pipe 1 is lowered, the upper flange steel pipe 1 will exert a downward force on the upper pad 15, which will enable the upper pad 15 to overcome the elastic resisting force of the return spring 6. The upper pad 15 will drive the sliding column 28 to slide downward. During the sliding process, the first cone 29 can engage in the first cone hole 27, and the second cone 17 engages in the second cone hole 26. As the sliding column 28 slides downward, the first cone 29 compresses the first elastic petal on the first cylindrical sleeve 22, causing the first elastic petal on the first cylindrical sleeve 22 to undergo elastic expansion deformation, and the first ball 23 can roll and contact the inner cavity of the lower flange steel pipe 10. This allows the lower pad 13 to automatically be coaxial with the lower flange steel pipe 10, thus avoiding the coaxiality error between the lower flange steel pipe 10 and the lower pad 13 caused by the assembly error of the clip 25 and the slot 16. At the same time, the second cone 17 compresses the inner wall of the second cone hole 26, causing the second elastic petal on the expansion sleeve 21 to also undergo elastic expansion deformation, and the second ball 19 on the second elastic petal also rolls and contacts the inner wall of the upper flange steel pipe 1, thus making the upper flange steel pipe 1 and the second cylindrical sleeve 4 coaxial. Because the upper pad 15 can reciprocate, the retaining strip 25 on the upper pad 15 can eventually be engaged in the retaining groove 16 of the upper connecting flange 2. At this time, the upper flange steel pipe 1 and the upper pad 15 are in a relatively stationary state. When the upper flange steel pipe 1 is lowered, if the connecting pin 30 is still in the serpentine groove 5, the upper flange steel pipe 1 will swing together with the upper pad 15 until the connecting pin 30 is engaged in the straight groove 14, so that the upper connecting flange 2, the upper pad 15, the lower pad 13 on the upper flange steel pipe 1 and the lower connecting flange 7 on the lower flange steel pipe 10 are connected together in sequence. At this point, the bolt holes on the upper connecting flange 2, upper gasket 15, lower gasket 13, and lower connecting flange 7 are in a one-to-one correspondence. Then, using bolts, the upper connecting flange 2, upper gasket 15, lower gasket 13, and lower connecting flange 7 are connected together, thereby completing the assembly of the upper flange steel pipe 1 and the lower flange steel pipe 10. In addition, after the upper flange steel pipe 1 and the lower flange steel pipe 10 are assembled, the connecting screw 11 can be removed from the connecting block 9 to remove the clamp 8, and at the same time, the return spring 6 can also be removed, so that the clamp 8, return spring 6, and other components can be recycled and reused.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-positioning and assembly structure for steel pipe composite tower flanges, characterized in that, It includes an upper flange steel pipe (1) and a lower flange steel pipe (10) with connecting flanges respectively. The lower flange steel pipe (10) is provided with a lower pad plate (13) that is adaptively tightened with its inner wall to maintain coaxiality. The lower pad plate (13) is provided with an upper pad plate (15) that can swing back and forth in the circumferential direction. Both the upper pad (15) and the lower pad (13) are provided with locking strips (25) for engaging and positioning with the corresponding flanges. When the upper flange steel pipe (1) presses down on the upper pad (15), the upper pad (15) swings circumferentially to make the locking strips (25) engage with the corresponding flanges. At the same time, the inner wall of the upper flange steel pipe (1) is adaptively tightened to keep coaxial with the upper pad (15), and the upper pad (15) and the lower pad (13) cooperate to guide and align the bolt holes of the upper connecting flange (2) and the lower connecting flange (7).

2. The quick positioning and assembly structure of the steel pipe structure flange of the steel pipe composite tower according to claim 1, characterized in that, The lower flange steel pipe (10) is fitted with a first cylindrical sleeve (22), and the lower pad (13) is fixed to the upper end of the first cylindrical sleeve (22). The first cylindrical sleeve (22) is provided with a first variable diameter slit (24) that divides its lower side into multiple first elastic valves around its periphery. The first elastic valve is provided with a first ball bearing (23) on its outer side. The first cylindrical sleeve (22) has a sliding column (28) inside. The lower end of the sliding column (28) is provided with a first cone head (29). The lower end of the first cylindrical sleeve (22) is provided with a first cone hole (27) that cooperates with the first cone head (29). When the sliding column (28) slides down, the first cone head (29) squeezes the first elastic flap to open, so that the first ball (23) rolls and contacts the inner wall of the lower flange steel pipe (10).

3. The quick positioning and assembly structure for the steel pipe structure flange of the steel pipe composite tower according to claim 2, characterized in that, A second cylindrical sleeve (4) is coaxially fixed to the lower pad (13), and an expansion sleeve (21) is fixed to the upper end of the second cylindrical sleeve (4). The expansion sleeve (21) is provided with a second variable diameter slit (20) around its periphery, which divides it into multiple second elastic valves. A second ball bearing (19) is provided on the outer side of the second elastic valve. The upper end of the sliding column (28) is provided with a pull rod (18), the upper end of the pull rod (18) is provided with a second cone head (17), and the upper end of the expansion sleeve (21) is provided with a second cone hole (26) that cooperates with the second cone head (17). When the sliding column (28) slides down, the second cone head (17) squeezes the second elastic valve body to open it, so that the second ball (19) rolls and contacts the inner wall of the upper flange steel pipe (1).

4. The quick positioning and assembly structure of the steel pipe structure flange of the steel pipe composite tower according to claim 3, characterized in that, The upper pad (15) is slidably sleeved on the second cylindrical sleeve (4). A connecting pin (30) is fixedly connected to the upper side of the sliding column (28). The connecting pin (30) passes through the second cylindrical sleeve (4) and is fixedly connected to the upper pad (15). The second cylindrical sleeve (4) has an irregular groove for the connecting pin (30) to slide on its periphery. The irregular groove includes a serpentine groove (5) and a straight groove (14) that are connected. When the connecting pin (30) slides downward in the serpentine groove (5), it drives the upper pad (15) to swing back and forth in the circumferential direction.

5. The quick positioning and assembly structure for the steel pipe structure flange of the steel pipe composite tower according to claim 4, characterized in that, The lower flange steel pipe (10) is provided with a clamp (8) on its outer wall. The clamp (8) is provided with a support arm (12). The upper pad (15) is provided with a support plate on its outer edge. A limiting post (3) is provided between the support arm (12) and the support plate. A return spring (6) is fitted on the limiting post (3). The two ends of the return spring (6) elastically abut against the support arm (12) and the support plate respectively, so as to provide an upward return preload force for the upper pad (15).

6. The quick positioning and assembly structure for the steel pipe structure flange of the steel pipe composite tower according to claim 5, characterized in that, The clamp (8) is a split structure. The separate end of the clamp (8) is provided with a connecting block (9). The two connecting blocks (9) are detachably connected by connecting screws (11).

7. The quick positioning and assembly structure for the steel pipe structure flange of the steel pipe composite tower according to claim 1, characterized in that, The bottom surface of the lower pad (13) abuts against the top surface of the lower connecting flange (7), and the retaining strip (25) on the bottom surface of the lower pad (13) engages with the retaining groove (16) on the top surface of the lower connecting flange (7) for positioning. The top surface of the upper pad (15) abuts against the bottom surface of the upper connecting flange (2), and the retaining strip (25) on the top surface of the upper pad (15) engages with the retaining groove (16) on the bottom surface of the upper connecting flange (2) for positioning.

8. The quick positioning and assembly structure of the steel pipe structure flange of the steel pipe composite tower according to claim 1, characterized in that, Both the upper pad (15) and the lower pad (13) are provided with through holes corresponding to the flange bolt holes. When the surfaces of the upper pad (15) and the lower pad (13) abut against each other, the upper pad (15) and the lower pad (13) serve as buffer pads between the upper connecting flange (2) and the lower connecting flange (7).

9. The quick positioning and assembly structure for the steel pipe structure flange of the steel pipe composite tower according to claim 2, characterized in that, The outer diameter of the first cylindrical sleeve (22) is smaller than the inner diameter of the lower flange steel pipe (10). The inner cavities of the first cylindrical sleeve (22) and the second cylindrical sleeve (4) are connected and have the same inner diameter. The sliding column (28) slides freely up and down in the inner cavities of the first cylindrical sleeve (22) and the second cylindrical sleeve (4).

10. The quick positioning and assembly structure of the steel pipe structure flange of the steel pipe composite tower according to claim 3, characterized in that, The first variable diameter slot (24) is connected to the first conical hole (27). The outer diameter of the first conical head (29) decreases from top to bottom, the outer diameter of the second conical head (17) decreases from top to bottom, and the inner diameter of the second conical hole (26) decreases from top to bottom.

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