Construction method for assembling steel pipe poles using steel pipe pole assembly device for overhead power transmission and distribution lines

Abstract

The present invention relates to a construction method for a steel pipe pole assembly device for overhead power transmission and distribution lines, and the method is implemented using a steel pipe pole assembly device. The method comprises: hoisting a first section of steel pipe above a second section of steel pipe, and moving a guide head to a position opposite to a guide interface; a magnetic suction cup generates magnetic force, and under the attraction of the magnetic force, the guide head moves along the guide interface toward the direction close to the magnetic suction cup until the guide head is engaged and connected with a magnetic docking mechanism; the first section of steel pipe moves downward, and the end face of the first section of steel pipe contacts the end face of the second section of steel pipe, and the flange bolt holes are aligned; the housing is rotated to screw the flange bolt into the flange nut until it is tightened, thereby completing the docking installation of the first section of steel pipe and the second section of steel pipe. The present invention is suitable for the docking installation of segmented steel pipes, and enables construction personnel to complete the steel pipe pole flange hole alignment and positioning bolt installation processes without high-altitude operations, thereby reducing the difficulty of on-site installation of segmented steel pipes and the risk of high-altitude operations.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission and distribution overhead lines, and in particular to a construction method of a steel pipe pole assembly device for power transmission and distribution overhead lines. Background Art

[0002] Overhead transmission and distribution lines are primarily erected using three methods: angle steel towers, steel tubular towers, and steel tubular poles. While steel tubular poles are more expensive than the first two methods, they are widely used in urban areas due to their advantages, such as reduced corridor footprint and aesthetically pleasing appearance.

[0003] Currently, steel pipe poles are typically processed and galvanized in sections at the factory before being transported to the site for assembly via a disassembly process. Each section of steel pipe is connected via flange bolts. During the disassembly process, a crane hoists the upper section of the pipe and slowly moves it to the upper end of the already installed lower section. Several workers then pull and position the pipes, aligning the bolt holes of the upper and lower flanges with an accuracy tolerance of only 1-2mm. Because the pipes weigh several to over ten tons, manual pulling and high-precision hole alignment is not only difficult and inefficient, but also poses significant safety risks associated with working at height.

[0004] The purpose of the present invention is to provide a construction method for a steel pipe pole assembly device for overhead power transmission and distribution lines. The method can solve the shortcomings of the existing technology and is suitable for the butt-jointing installation of segmented steel pipes. It enables construction personnel to complete the steel pipe pole flange hole matching and positioning bolt installation processes without the need for high-altitude operations, thereby reducing the difficulty of on-site installation of segmented steel pipes and the risk of high-altitude operations.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A construction method for a steel pipe pole assembly device for overhead power transmission and distribution lines, the method being used for butt-jointing installation of two sections of steel pipe, the two sections comprising a first section and a second section; the first section being provided with a first flange having a plurality of first stiffening plates; the first flange having first flange bolt holes between two adjacent first stiffening plates; the second section being provided with a second flange having a plurality of second stiffening plates; the second flange having second flange bolt holes between two adjacent second stiffening plates.

[0007] The method adopts a steel pipe rod assembly device to carry out the butt-jointing installation of steel pipe rods, and the steel pipe rod assembly device includes a guiding mechanism, an automatic bolt installation mechanism and a magnetic docking mechanism; the guiding mechanism includes a guiding shell installed on a first section of the steel pipe and a guiding head connected to the guiding shell; the interior of the guiding shell is a variable diameter circular cavity with a smaller upper portion and a larger lower portion, and a nut sleeve is arranged inside the large diameter section of the variable diameter circular cavity, and a flange nut is placed in the nut sleeve; the automatic bolt installation mechanism includes a fixed shell installed on the second section of the steel pipe rod, a rotating shell arranged in the inner cavity of the fixed shell, and a bolt sleeve arranged in the inner cavity of the rotating shell, and a flange bolt is placed in the bolt sleeve; the magnetic docking mechanism includes a height adjustment telescopic unit installed on the fixed shell, a magnetic suction cup connected to the height adjustment telescopic unit, and a guiding interface arranged on one side of the magnetic suction cup and corresponding to the guide head;

[0008] The method comprises the following steps:

[0009] S1. Equipment in place before lifting

[0010] Place the flange nut into the nut sleeve, tighten the guide mechanism on the first stiffening plate, and adjust the nut sleeve to coincide with the central axis of the first flange bolt hole; place the flange bolt into the bolt sleeve, tighten the automatic bolt installation mechanism on the second stiffening plate, and adjust the bolt sleeve to coincide with the central axis of the second flange bolt hole; at this time, the magnetic docking mechanism fixed on the automatic bolt installation mechanism is also positioned on the second section of steel pipe;

[0011] S2. Coordination between the guiding mechanism and the magnetic docking mechanism

[0012] After the second section of steel pipe is installed, the first section of steel pipe is hoisted above the second section of steel pipe, and the guide head is moved to a position opposite to the guide interface. The magnetic suction cup generates magnetic force. Under the attraction of the magnetic force, the guide head moves along the guide interface toward the magnetic suction cup until the guide head is engaged with the magnetic docking mechanism.

[0013] S3. Alignment of flange bolt holes

[0014] The first section of the steel pipe moves downward, the end face of the first section of the steel pipe contacts the end face of the second section of the steel pipe, and the first flange bolt hole on the first section of the steel pipe is aligned with the second flange bolt hole on the second section of the steel pipe;

[0015] S4. Tightening of flange bolts

[0016] When the first flange bolt hole is aligned with the second flange bolt hole, the rotating shell drives the bolt sleeve and the flange bolt therein to rotate, so that the flange bolt is screwed into the flange nut until it is tightened, completing the docking installation of the first section of steel pipe and the second section of steel pipe.

[0017] Furthermore, a screw is provided at the top of the fixed housing, and the screw is used to install a limit clip, and the limit clip rotates around the screw as an axis under the action of an external force; the fixed housing is mounted on the second stiffening plate through a second bolt; and at least three second bolts are provided on the second stiffening plate;

[0018] The rotating shell is connected to the bottom of the inner cavity of the fixed shell through a rotating shaft, and the rotating shaft is driven to rotate by a motor; a valve position pile is set at the top of the rotating shell, and a first spring is set in the inner cavity; the bottom end of the first spring is fixed to the bottom of the inner cavity of the rotating shell, and the top end is connected to a gasket; a flange bolt is placed in the bolt sleeve, and the flange bolt is located above the gasket.

[0019] Furthermore, the height-adjusting telescopic unit includes a base mounted on the fixed shell, a spring sleeve mounted on the base, a second spring arranged in the spring sleeve, and an adjusting rod with one end embedded in the spring sleeve; the other end of the adjusting rod is connected to the magnetic docking mechanism.

[0020] Furthermore, a self-locking unit is provided between the guide interface and the magnetic suction cup; the self-locking unit includes a self-locking cavity, a self-locking spring provided in the self-locking cavity, and a limit block connected to the self-locking spring; the self-locking unit is used for the guide head to enter the guide interface under the attraction of the magnetic suction cup and be locked in the guide interface through the limit block; a position sensor is provided in the self-locking cavity;

[0021] The magnetic suction cup includes a permanent magnet array and a remote control knob switch. The permanent magnet array includes a fixed permanent magnet array and a movable permanent magnet array. The magnetic force of the magnetic suction cup is adjusted by changing the position of the movable permanent magnet array through the remote control knob switch.

[0022] Furthermore, a positioning screw is provided at the bottom end of the guide shell, the positioning screw fixes the nut gasket, and a flange nut located above the nut gasket is placed in the nut sleeve; the guide shell is installed on the first stiffening plate through a first bolt; at least 3 first bolts are provided on the first stiffening plate.

[0023] Furthermore, one end of the guide head is connected to the guide housing, and the other end is docked with the guide interface under the attraction of the magnetic chuck to achieve alignment and positioning of the first section of the steel pipe and the second section of the steel pipe;

[0024] The guide interface is a trumpet-shaped interface made of non-ferromagnetic material;

[0025] One end of the guide head that matches the guide interface is a steel spherical surface.

[0026] Furthermore, the flange nut is placed in the nut sleeve, the guide mechanism is fastened to the first stiffening plate, and the nut sleeve is adjusted to coincide with the central axis of the first flange bolt hole; the flange bolt is placed in the bolt sleeve, the automatic bolt installation mechanism is fastened to the second stiffening plate, and the bolt sleeve is adjusted to coincide with the central axis of the second flange bolt hole, including:

[0027] Before assembling the first section of steel pipe, place the flange nut into the nut sleeve on the ground, place the nut gasket and tighten it with the set screw. By changing the length of the first bolt extending into the area between the two first stiffening plates, adjust the position of the guide housing on the first flange so that the nut sleeve coincides with the central axis of the first flange bolt hole.

[0028] Before assembling the second section of steel pipe, put the flange bolt into the bolt sleeve on the ground. The flange bolt is located above the pad. The screw end of the flange bolt is supported by the limit clamp, so that the flange bolt is completely located in the bolt sleeve and the first spring is in a compressed state.

[0029] By changing the length of the second bolt extending into the area between the two second stiffening plates, the position of the fixed housing on the second flange is adjusted so that the bolt sleeve coincides with the central axis of the second flange bolt hole.

[0030] Furthermore, the magnetic chuck generates magnetic force, and under the attraction of the magnetic force, the guide head moves along the guide interface toward the magnetic chuck until the guide head is engaged with the magnetic docking mechanism, including:

[0031] When the spherical surface of the seeker contacts the inner wall of the trumpet-shaped guidance interface, the ground staff turns on the remote control knob, and the magnetic field of the magnetic suction cup is activated, attracting the seeker to slide along the inner wall of the trumpet-shaped guidance interface into the guidance interface;

[0032] When the seeker head slides into the guide interface, the seeker head squeezes the limit block of the self-locking unit to compress the self-locking spring, and the seeker head passes through the limit block of the self-locking unit and continues to move toward the magnetic chuck.

[0033] When the spherical surface of the guide head completely enters the inner side of the limit block, that is, away from the end of the guide interface, the compressed self-locking spring resets, driving the limit block to return to its original position, thereby clamping the guide head between the limit block and the magnetic suction cup.

[0034] Furthermore, the first section of the steel pipe moves downward, the end face of the first section of the steel pipe contacts the end face of the second section of the steel pipe, and the flange bolt holes on the first section of the steel pipe are aligned with the corresponding flange bolt holes on the second section of the steel pipe, including:

[0035] The crane drives the first section of steel pipe to move downward, and the magnetic suction cup connected to the guide head of the first section of steel pipe presses down the adjusting rod of the height adjustment telescopic unit, compresses the first spring and moves downward slowly and steadily until the first flange falls onto the second flange. At this time, the bolt holes of the first flange are aligned with the bolt holes of the second flange.

[0036] Furthermore, the rotating housing rotates to drive the bolt sleeve and the flange bolt therein to rotate, so that the flange bolt is screwed into the flange nut until it is tightened, thereby completing the docking installation of the first section of the steel pipe and the second section of the steel pipe, including:

[0037] The ground staff controls the motor through the remote control switch to drive the rotating shaft to rotate the rotating housing. The rotating valve position pile pushes the limit clamping bar to rotate and leave the top of the rotating housing. The flange bolt is pushed out by the first spring, so that the end of the screw passes through the second flange bolt hole, the first flange bolt hole and the hole of the nut washer and enters the lower end of the flange nut;

[0038] The rotating housing continues to rotate to drive the bolt sleeve and the flange bolt therein to rotate, so that the flange bolt is screwed into the flange nut until it is tightened;

[0039] Repeat the above steps until all flange bolts are screwed into the corresponding flange nuts.

[0040] This invention addresses the shortcomings of the existing technology and is suitable for the butt-jointing installation of segmented steel pipes. It allows construction workers to complete the pipe rod flange alignment and locating bolt installation processes without having to work at height, reducing the difficulty of on-site installation of segmented steel pipes and the safety risks of working at height. The invention also uses remote control to adjust the magnetic field of the magnetic chuck and control the automatic bolt installation mechanism during installation. By reducing manpower through intelligent and mechanized processes, the pipe butt-jointing and bolt installation processes are seamlessly completed, significantly improving construction and assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a flow chart of the construction method of the present invention;

[0042] Figure 2 This is a schematic structural diagram of a steel pipe pole assembly device for overhead power transmission and distribution lines according to the present invention;

[0043] Figure 3 A top view of the first flange of the first section of the steel pipe in the present invention;

[0044] Figure 4 A top view of the second flange of the second section of the steel pipe in the present invention;

[0045] Figure 5 for Figure 1 Enlarged view of part A in the middle;

[0046] Figure 6A side view of the guide housing of the present invention;

[0047] Figure 7a It is a side view of the automatic bolt installation mechanism of the present invention;

[0048] Figure 7b A side view of the automatic bolt installation mechanism of the present invention (excluding the flange and stiffening plate);

[0049] Figure 7c A top view of the automatic bolt installation mechanism of the present invention (excluding the flange and stiffening plate);

[0050] Figure 7d This is a diagram showing the state changes of the limit clip when the automatic bolt installation mechanism of the present invention is working (excluding the flange and stiffening plate);

[0051] Figure 8 A top view of the magnetic docking mechanism of the present invention;

[0052] Figure 9 It is a side view of the guide interface in the present invention.

[0053] in:

[0054] 1. First section of steel pipe, 2. Second section of steel pipe, 3. First flange, 4. Second flange, 5. First stiffening plate, 6. Second stiffening plate, 7. First flange bolt hole, 8. Second flange bolt hole, 9. Guide housing, 10. First bolt, 11. Guide head, 12. Variable diameter circular cavity, 13. Nut sleeve, 14. Flange nut, 15. Nut washer, 16. Positioning screw, 17. Fixed housing, 18. Second bolt, 19. Rotating housing, 20. Bolt sleeve, 21. Flange bolt, 22. First spring, 23. Spacer, 24. Rotating shaft, 25. Limiting strip, 26. Screw, 27. Valve position pile, 28. Magnetic suction cup, 29. Guide interface, 30. Inner wall of guide interface, 31. Self-locking unit, 32. Self-locking cavity, 33. Self-locking spring, 34. Limiting block, 35. Permanent magnet array, 36. Remote control knob switch, 37. Adjusting rod, 38. Spring sleeve, 39. Second spring, 40. Base. DETAILED DESCRIPTION

[0055] The present invention will be further described below with reference to the accompanying drawings:

[0056] like Figure 1 A construction method for assembling a steel pipe pole for an overhead power transmission and distribution line is shown. Figure 2 The steel pipe rod assembly device shown is realized.

[0057] like Figures 2 to 4As shown, this device, used for butt-jointing two sections of steel pipe, includes a guide mechanism, an automatic bolt installation mechanism, and a magnetic butt-jointing mechanism. These mechanisms work closely together to achieve a seamless process of butt-jointing and bolt installation, improving construction efficiency. Furthermore, the intelligent and mechanized nature of this device reduces the need for workers to work at height, thus mitigating construction risks.

[0058] The two sections of steel pipe are divided into a first section of steel pipe 1 and a second section of steel pipe 2. In this embodiment, the first section of steel pipe 1 is the steel pipe located at the top, and the second section of steel pipe 2 is the steel pipe located at the bottom. Through the guiding mechanism and the magnetic docking mechanism, the two sections of steel pipe are precisely docked and positioned in the vertical direction. The first section of steel pipe 1 includes a first steel pipe body and a first flange 3 arranged at one end of the first steel pipe body; a plurality of first stiffening plates 5 are arranged on the first flange 3; a first flange bolt hole 7 is arranged on the first flange 3 between two adjacent first stiffening plates; the second section of steel pipe 2 includes a second steel pipe body and a second flange 4 arranged at one end of the second steel pipe body; a plurality of second stiffening plates 6 are arranged on the second flange 4; a second flange bolt hole 8 is arranged on the second flange 4 between the two second stiffening plates.

[0059] like Figure 5 and Figure 6 As shown, the guide mechanism comprises a guide housing 9 mounted on the first steel pipe section 1 and a guide head 11 connected to the guide housing 9. A variable diameter circular cavity 12, smaller at the top and larger at the bottom, is located within the guide housing 9. A nut sleeve 13 is located within the larger diameter section of the variable diameter circular cavity 12. The guide housing 9 is mounted between the two first stiffening plates 5 via first bolts 10. Three first bolts 10 are provided on the first stiffening plates 5. By varying the length of the first bolts 10 extending into the area between the two first stiffening plates 5, the position of the guide housing 9 on the first flange 3 is adjusted so that the nut sleeve 13 aligns with the central axis of the first flange bolt hole 7. One end of the guide head 11 is connected to the guide housing 9, and the other end is used to mate with the guide interface 29 and the magnetic chuck 28 to achieve alignment between the first and second steel pipe sections 1 and 2. The guide mechanism, magnetic docking mechanism, and automatic bolt installation mechanism are provided in a one-to-one correspondence. During the docking and positioning of the upper and lower steel pipe sections, two sets of corresponding guide mechanisms, magnetic docking mechanisms, and automatic bolt installation mechanisms can be installed along the outer circumference of the steel pipe. The docking and positioning installation of one set is performed first, and then the docking and positioning installation of the other set is performed. Once both sets are docked and positioned, the corresponding flange bolt holes on the first flange 3 and the second flange 4 are fully aligned, achieving precise matching of the assembly positions of the upper and lower steel pipe sections.

[0060] like Figure 5、 Figure 8 and Figure 9 As shown, the magnetic docking mechanism includes a height adjustment telescopic unit installed on a fixed shell 17, a magnetic suction cup 28 connected to the height adjustment telescopic unit, and a guide interface 29 arranged on one side of the magnetic suction cup 28 and corresponding to the guide head 11. The guide interface 29 is made of a trumpet-shaped non-ferromagnetic material with high wear resistance and low friction coefficient, and the inner diameter gradually becomes smaller; the end of the guide head 11 that matches the guide interface 29 is a steel spherical surface. The inner wall 30 of the guide interface is a smooth conical surface. Flange bolts are used to connect the segmented steel pipes, and the alignment accuracy is only allowed to deviate by 1~2mm. It is difficult to achieve such high-precision automatic docking by hoisting. At present, construction mainly adopts manual traction positioning, which has low construction efficiency and high risks of high-altitude operations. The present invention proposes a trumpet-shaped design of the guide interface. During hoisting, it is only necessary to move the guide head to the trumpet-shaped area of the guide interface to complete the subsequent docking operation, significantly increasing the hoisting positioning area and reducing the hoisting accuracy requirements and construction difficulty. By designing one end of the guide head as a steel spherical surface and the inner wall of the guide interface as a smooth conical surface, the friction between the contact surface of the guide head and the guide interface can be reduced, and the resistance during the docking process can be reduced, so that the guide head can move along the guide interface toward the magnetic suction cup under the magnetic attraction of the magnetic suction cup.

[0061] After the guide head enters the trumpet-shaped area of the guide interface, if the conventional method of adjusting the vertical or horizontal position of the guide head through the hoisting equipment is used to further complete the subsequent docking, it is easy for the guide head to detach from the guide interface again due to the difficulty in controlling the adjustment amplitude, resulting in repeated docking problems. Based on this, the present invention innovatively proposes a magnetic suction cup, which uses magnetic force to attract the steel guide head and increase magnetic traction during the hoisting and docking process; and the guide head adopts a steel spherical design, and the inner wall of the guide interface adopts a non-ferromagnetic material with high wear resistance and low friction coefficient, which fully reduces the friction between the contact surface of the guide head and the guide interface, improves the sensitivity of the guide head under the action of magnetic force, and significantly improves the docking efficiency. In the process of the crane lifting the upper section of the steel pipe to move it above the lower section of the steel pipe and docking it with the lower section of the steel pipe, the upper section of the steel pipe only needs to be roughly positioned so that the guide head is located in the trumpet-shaped area of the guide interface, and the distance between the two is very close. At this time, the ground construction workers use the remote control switch to turn on the magnetic docking mechanism, so that the magnetic suction cup generates a strong magnetic force. Under the magnetic attraction, the guide head is quickly and accurately docked into the magnetic docking mechanism, completing the alignment and positioning of the upper and lower steel pipes. This design significantly improves the docking efficiency of the upper and lower steel pipes.

[0062] like Figure 5As shown, the height-adjustable telescopic unit includes a base 40 mounted on a fixed housing 17, a spring sleeve 38 mounted on the base 40, a second spring 39 disposed within the spring sleeve 38, and an adjustment rod 37 with one end embedded within the spring sleeve 38; the other end of the adjustment rod 37 is connected to the magnetic docking mechanism. The adjustment rod and spring of the height-adjustable telescopic unit not only adjust the height of the guide interface in response to the vertical force component generated during contact between the guide head and the guide interface, improving the device's self-correcting performance, but also provide a buffering effect during the downward movement of the upper section of the steel pipe after docking, reducing impact and improving stability.

[0063] Furthermore, a self-locking unit 31 is provided between the guide interface 29 and the magnetic suction cup 28; the self-locking unit 31 is used for the guide head 11 to enter the guide interface 29 under the attraction of the magnetic suction cup 28 and be locked in the guide interface 29; the self-locking unit includes a self-locking cavity 32, a self-locking spring 33 provided in the self-locking cavity 32, and a limit block 34 connected to the self-locking spring 33; a position sensor is provided in the self-locking cavity 32. By providing a self-locking unit, once the docking is successful, the guide head can be immediately locked in the guide interface through the limit block, and the docking result can be fixed in time, avoiding repeated docking caused by factors such as inertial impact and wind load during the hoisting docking process, thereby ensuring the stability of the docking result. By providing a position sensor, after the docking is completed, a signal can be sent to the ground to inform the ground staff of the docking result of the steel pipe.

[0064] Furthermore, the magnetic suction cup 28 includes a permanent magnet array 35 and a remote control knob switch 36. The permanent magnet array 35 includes a fixed permanent magnet array and a movable permanent magnet array. The remote control knob switch 36 is used to change the position of the movable permanent magnet array to adjust the magnetic force of the magnetic suction cup 28. During the docking, positioning and assembly process of two sections of steel pipes, construction workers do not need to work at high altitudes. On the ground, they use a remote control equipped with a signal transmitting unit to send control instructions to the remote control knob switch equipped with a signal receiving unit. The remote control knob switch drives the rotating shaft to rotate according to the instructions, so that the position of the movable permanent magnet array on the rotating shaft is adjusted, thereby adjusting the magnetic force of the entire magnetic suction cup.

[0065] like Figure 6As shown, a set screw 16 is provided at the bottom end of the guide housing 9; this set screw 16 secures a nut washer 15. A flange nut 14 is housed in the nut sleeve 13, positioned above the nut washer 15. The inner wall shape of the nut sleeve 13 matches the profile of the flange nut 14. The nut sleeve 13 is positioned within the large diameter section of the variable diameter circular cavity 12. During assembly of the flange bolt 21 and the flange nut 14, the nut sleeve 13 and the guide housing 9 remain relatively stationary. When using a different model of flange nut 14, simply replace the nut sleeve 13 with the model that matches the flange nut 14.

[0066] As shown in Figure 7, the automatic bolt installation mechanism includes a fixed housing 17 mounted on the second stiffening plate 6 via second bolts 18, a rotating housing 19 disposed within the interior of the fixed housing 17, and a bolt sleeve 20 disposed within the interior of the rotating housing 19. A screw 26 is disposed at the top of the fixed housing 17 for mounting a limit bar 25. The limit bar 25 rotates about the screw 26 under the action of an external force. Three second bolts 18 are disposed on the second stiffening plate 6. By varying the length of the second bolts 18 extending into the area between the two second stiffening plates 6, the position of the fixed housing 17 on the second flange 4 is adjusted so that the bolt sleeve 20 coincides with the central axis of the second flange bolt hole 8. The rotating housing 19 is connected to the bottom of the interior of the fixed housing 17 via a rotating shaft 24, which is driven to rotate by a motor. A valve position post 27 is installed at the top of the rotating housing 19, and a first spring 22 is installed within the inner cavity. The bottom end of the first spring 22 is fixed to the bottom of the inner cavity of the rotating housing 19, and the top end is connected to a spacer 23. A flange bolt 21 is placed in the bolt sleeve 20, located above the spacer 23. The screw end of the flange bolt 21 is supported by the limit clamp 25, ensuring that the flange bolt 21 is fully positioned within the bolt sleeve 20. The first spring 22 is in a compressed state. When the first flange bolt hole 7 is aligned with the second flange bolt hole 8, the ground construction personnel control the motor drive shaft 24 via a remote control to rotate the rotating housing 19. The rotating valve position post 27 pushes the limit clamp 25 to rotate and move away from the top of the rotating housing 19. The flange bolt 21 is pushed out by the first spring 22, and its screw end passes through the second flange bolt hole 8, the first flange bolt hole 7, and the hole in the nut washer 15 and enters the lower end of the flange nut 14. The rotating housing 19 rotates, driving the bolt sleeve 20 and the flange bolt 21 therein to rotate, causing the flange bolt 21 to be screwed into the flange nut 14 until it is tightened. The rotating housing is placed within the fixed housing, and the bolt sleeve is placed within the rotating housing. The outer diameter of the bolt sleeve is adapted to the inner diameter of the rotating housing, and the inner wall shape of the bolt sleeve is adapted to the profile of the flange bolt.

[0067] When the upper and lower flanges of the steel pipe are successfully docked, the construction workers on the ground control the motor through the remote control switch to drive the bolt sleeve to rotate and complete the initial tightening of the flange bolts, avoiding the construction workers from working at height and significantly improving the assembly efficiency; its bolt sleeve and nut sleeve can be replaced with different models according to the different specifications of flange bolts, and have high compatibility. When using flange bolts of different models, it is only necessary to replace the bolt sleeve that matches the flange bolt model, which improves the versatility of the device described in the present invention. By setting up an automatic bolt installation mechanism, the continuous process of steel pipe docking and bolt initial tightening is realized, intelligent labor is reduced, and mechanization replaces labor, significantly improving assembly efficiency. The bolt sleeve and nut sleeve in the automatic bolt installation mechanism can be replaced with different models to match flange bolts of different specifications, thereby improving equipment compatibility. Both the magnetic docking mechanism and the automatic bolt installation mechanism are remotely controlled and operated, and construction workers can operate on the ground, avoiding people going up the tower and reducing the risk of high-altitude operations.

[0068] The construction method of the above device is:

[0069] (1) Before assembling the second section of the steel pipe 2, that is, before assembling the lower section of the steel pipe, place the flange bolt 21 into the bolt sleeve 20 on the ground, and use the limit clamp 25 to support the screw end of the flange bolt 21 so that the flange bolt 21 is completely located in the bolt sleeve 20 and the first spring 22 is in a compressed state. Fasten the automatic bolt installation mechanism to the second stiffening plate 6, and adjust the second bolt 18 so that the bolt sleeve 20 coincides with the central axis of the second flange bolt hole 8. At this time, the magnetic docking mechanism fixed to the automatic bolt installation mechanism through the base 40 is also positioned on the second section of the steel pipe 2.

[0070] (2) Before assembling the first section of steel pipe 1, place the flange nut 14 into the nut sleeve 13 on the ground, place the nut washer 15 and tighten it with the set screw 16. Fasten the guide mechanism to the first stiffening plate 5, and adjust the first bolt 10 so that the nut sleeve 13 coincides with the central axis of the first flange bolt hole 7.

[0071] (3) After the second section of steel pipe 2 is assembled, the first section of steel pipe 1 is lifted by a crane and slowly moved so that the guide head 11 approaches the trumpet-shaped guide interface 29. When the spherical surface of the guide head 11 contacts the inner wall 30 of the trumpet-shaped guide interface, the ground staff turns on the remote control knob switch 36, and the magnetic field of the magnetic suction cup 28 is turned on, attracting the guide head 11 to slide along the inner wall 30 of the trumpet-shaped guide interface into the guide interface 29. During the process of the guide head 11 sliding into the guide interface 29, the guide head 11 squeezes the limit block 34 of the self-locking unit 31 to compress the self-locking spring 33, and the guide head 11 passes through the limit block 34 of the self-locking unit 31 and continues to move toward the magnetic suction cup 28. When the spherical surface of the guide head 11 completely enters the inner side of the stop block 34 (the end away from the guide interface), the compressed self-locking spring 33 resets, driving the stop block 34 back to its original position, thereby clamping the guide head 11 between the stop block 34 and the magnetic chuck 28. At this time, the centers of the first flange bolt holes 7 and the second flange bolt holes 8 are aligned.

[0072] (4) The crane is slowly released, and the magnetic suction cup 28 connected to the first section of steel pipe 1 is pressed down by the adjusting rod 37 of the height adjustment telescopic unit, compressing the second spring 39 and slowly and steadily moving downward until the first flange 3 falls onto the second flange 4. At this time, the ground staff controls the motor drive shaft 24 through the remote control switch to drive the rotating shell 19 to rotate. The rotating valve position pile 27 pushes the limit clamping bar 25 to rotate and leave the top of the rotating shell 19. The flange bolt 21 is pushed out by the first spring 22, so that the end of the screw passes through the second flange bolt hole 8, the first flange bolt hole 7 and the hole of the nut gasket 15 and enters the lower end of the flange nut 14. The rotation of the rotating shell 19 continues to drive the bolt sleeve 20 and the flange bolt 21 therein to rotate, so that the flange bolt 21 is screwed into the flange nut 14 until it is tightened. Repeat the above steps until each flange bolt is screwed into the corresponding flange nut.

[0073] In summary, the present invention is suitable for the butt-jointing installation of segmented steel pipes. Through the close cooperation of the guiding mechanism, the magnetic butt-jointing mechanism, and the automatic bolt installation mechanism, construction personnel can complete the steel pipe rod flange hole alignment and locating bolt installation processes without having to work at height. By reducing the number of workers through intelligent and mechanized labor, the present invention not only streamlines the steel pipe butt-jointing and bolt installation processes, improving construction and assembly efficiency, but also reduces the difficulty of on-site installation of segmented steel pipes and the safety risks associated with personnel working at height.

[0074] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A construction method for assembling a steel pipe pole with a steel pipe pole assembly device for overhead power transmission and distribution lines, characterized in that: The method is used for butt-jointing and installing two sections of steel pipe, wherein the two sections of steel pipe include a first section of steel pipe and a second section of steel pipe; the first section of steel pipe is provided with a first flange having a plurality of first stiffening plates; the first flange has first flange bolt holes arranged between two adjacent first stiffening plates; the second section of steel pipe is provided with a second flange having a plurality of second stiffening plates; the second flange has second flange bolt holes arranged between two adjacent second stiffening plates; The method adopts a steel pipe rod assembly device to carry out the butt-jointing installation of steel pipe rods, and the steel pipe rod assembly device includes a guiding mechanism, an automatic bolt installation mechanism and a magnetic docking mechanism; the guiding mechanism includes a guiding shell installed on a first section of the steel pipe and a guiding head connected to the guiding shell; the interior of the guiding shell is a variable diameter circular cavity with a smaller upper portion and a larger lower portion, and a nut sleeve is arranged inside the large diameter section of the variable diameter circular cavity, and a flange nut is placed in the nut sleeve; the automatic bolt installation mechanism includes a fixed shell installed on the second section of the steel pipe rod, a rotating shell arranged in the inner cavity of the fixed shell, and a bolt sleeve arranged in the inner cavity of the rotating shell, and a flange bolt is placed in the bolt sleeve; the magnetic docking mechanism includes a height adjustment telescopic unit installed on the fixed shell, a magnetic suction cup connected to the height adjustment telescopic unit, and a guiding interface arranged on one side of the magnetic suction cup and corresponding to the guide head; The method comprises the following steps: S1. Equipment in place before lifting Place the flange nut into the nut sleeve, tighten the guide mechanism on the first stiffening plate, and adjust the nut sleeve to coincide with the central axis of the first flange bolt hole; place the flange bolt into the bolt sleeve, tighten the automatic bolt installation mechanism on the second stiffening plate, and adjust the bolt sleeve to coincide with the central axis of the second flange bolt hole; at this time, the magnetic docking mechanism fixed on the automatic bolt installation mechanism is also positioned on the second section of steel pipe; S2. Coordination between the guiding mechanism and the magnetic docking mechanism After the second section of steel pipe is installed, the first section of steel pipe is hoisted above the second section of steel pipe, and the guide head is moved to a position opposite to the guide interface. The magnetic suction cup generates magnetic force. Under the attraction of the magnetic force, the guide head moves along the guide interface toward the magnetic suction cup until the guide head is engaged with the magnetic docking mechanism. S3. Alignment of flange bolt holes The first section of the steel pipe moves downward, the end face of the first section of the steel pipe contacts the end face of the second section of the steel pipe, and the first flange bolt hole on the first section of the steel pipe is aligned with the second flange bolt hole on the second section of the steel pipe; S4. Tightening of flange bolts When the first flange bolt hole is aligned with the second flange bolt hole, the rotating shell drives the bolt sleeve and the flange bolt therein to rotate, so that the flange bolt is screwed into the flange nut until it is tightened, completing the docking installation of the first section of steel pipe and the second section of steel pipe.

2. The method according to claim 1, characterized in that A screw is provided at the top of the fixed housing, and the screw is used to install a limit clip. The limit clip rotates around the screw under the action of an external force. The fixed housing is mounted on the second stiffening plate by a second bolt. At least three second bolts are provided on the second stiffening plate. The rotating shell is connected to the bottom of the inner cavity of the fixed shell through a rotating shaft, and the rotating shaft is driven to rotate by a motor; a valve position pile is set at the top of the rotating shell, and a first spring is set in the inner cavity; the bottom end of the first spring is fixed to the bottom of the inner cavity of the rotating shell, and the top end is connected to a gasket; a flange bolt is placed in the bolt sleeve, and the flange bolt is located above the gasket.

3. The method according to claim 2, characterized in that The height adjustment telescopic unit includes a base mounted on the fixed shell, a spring sleeve mounted on the base, a second spring arranged in the spring sleeve, and an adjustment rod with one end embedded in the spring sleeve; the other end of the adjustment rod is connected to the magnetic docking mechanism.

4. The method according to claim 3, characterized in that A self-locking unit is provided between the guide interface and the magnetic suction cup; the self-locking unit includes a self-locking cavity, a self-locking spring provided in the self-locking cavity, and a limit block connected to the self-locking spring; the self-locking unit is used for the guide head to enter the guide interface under the attraction of the magnetic suction cup and be locked in the guide interface by the limit block; A position sensor is provided in the self-locking cavity; The magnetic suction cup includes a permanent magnet array and a remote control knob switch. The permanent magnet array includes a fixed permanent magnet array and a movable permanent magnet array. The magnetic force of the magnetic suction cup is adjusted by changing the position of the movable permanent magnet array through the remote control knob switch.

5. The method according to claim 4, characterized in that A positioning screw is provided at the bottom end of the guide shell, and the positioning screw fixes the nut gasket. A flange nut located above the nut gasket is placed in the nut sleeve; the guide shell is mounted on the first stiffening plate through a first bolt; at least three first bolts are provided on the first stiffening plate.

6. The method according to claim 5, characterized in that One end of the guide head is connected to the guide housing, and the other end is connected to the guide interface under the attraction of the magnetic chuck to achieve alignment and positioning of the first section of the steel pipe and the second section of the steel pipe; The guide interface is a trumpet-shaped interface made of non-ferromagnetic material; One end of the guide head that matches the guide interface is a steel spherical surface.

7. The method according to claim 6, characterized in that The flange nut is placed in the nut sleeve, the guide mechanism is fastened to the first stiffening plate, and the nut sleeve is adjusted to coincide with the central axis of the first flange bolt hole; the flange bolt is placed in the bolt sleeve, the automatic bolt installation mechanism is fastened to the second stiffening plate, and the bolt sleeve is adjusted to coincide with the central axis of the second flange bolt hole, including: Before assembling the first section of steel pipe, place the flange nut into the nut sleeve on the ground, place the nut gasket and tighten it with the set screw. By changing the length of the first bolt extending into the area between the two first stiffening plates, adjust the position of the guide housing on the first flange so that the nut sleeve coincides with the central axis of the first flange bolt hole. Before assembling the second section of steel pipe, put the flange bolt into the bolt sleeve on the ground. The flange bolt is located above the pad. The screw end of the flange bolt is supported by the limit clamp, so that the flange bolt is completely located in the bolt sleeve and the first spring is in a compressed state. By changing the length of the second bolt extending into the area between the two second stiffening plates, the position of the fixed housing on the second flange is adjusted so that the bolt sleeve coincides with the central axis of the second flange bolt hole.

8. The method according to claim 7, characterized in that The magnetic chuck generates magnetic force. Under the attraction of the magnetic force, the guide head moves along the guide interface toward the magnetic chuck until the guide head is engaged with the magnetic docking mechanism, including: When the spherical surface of the seeker contacts the inner wall of the trumpet-shaped guidance interface, the ground staff turns on the remote control knob, and the magnetic field of the magnetic suction cup is activated, attracting the seeker to slide along the inner wall of the trumpet-shaped guidance interface into the guidance interface; When the seeker head slides into the guide interface, the seeker head squeezes the limit block of the self-locking unit to compress the self-locking spring, and the seeker head passes through the limit block of the self-locking unit and continues to move toward the magnetic chuck. When the spherical surface of the guide head completely enters the inner side of the limit block, that is, away from the end of the guide interface, the compressed self-locking spring resets, driving the limit block to return to its original position, thereby clamping the guide head between the limit block and the magnetic suction cup.

9. The method according to claim 8, characterized in that The first section of the steel pipe moves downward, the end face of the first section of the steel pipe contacts the end face of the second section of the steel pipe, and the first flange bolt hole on the first section of the steel pipe is aligned with the second flange bolt hole on the second section of the steel pipe, including: The crane drives the first section of steel pipe to move downward, and the magnetic suction cup connected to the guide head of the first section of steel pipe presses down the adjusting rod of the height adjustment telescopic unit, compresses the first spring and moves downward slowly and steadily until the first flange falls onto the second flange. At this time, the bolt holes of the first flange are aligned with the bolt holes of the second flange.

10. The method according to claim 9, characterized in that The rotating housing rotates to drive the bolt sleeve and the flange bolt therein to rotate, so that the flange bolt is screwed into the flange nut until it is tightened, completing the docking installation of the first section of the steel pipe and the second section of the steel pipe, including: The ground staff controls the motor through the remote control switch to drive the rotating shaft to rotate the rotating housing. The rotating valve position pile pushes the limit clamping bar to rotate and leave the top of the rotating housing. The flange bolt is pushed out by the first spring, so that the end of the screw passes through the second flange bolt hole, the first flange bolt hole and the hole of the nut washer and enters the lower end of the flange nut; The rotating housing continues to rotate to drive the bolt sleeve and the flange bolt therein to rotate, so that the flange bolt is screwed into the flange nut until it is tightened; Repeat the above steps until all flange bolts are screwed into the corresponding flange nuts.

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