Steel pipe pole assembling device for power transmission and distribution overhead line

Abstract

The present application relates to a kind of steel pipe pole assembly devices for power transmission and distribution overhead line, the device includes guide mechanism, bolt automatic installation mechanism and magnetic docking mechanism;Guide mechanism includes guide housing mounted on the first section steel pipe and guide head connected with guide housing;Bolt automatic installation mechanism includes fixed housing mounted on the second section steel pipe pole, rotating housing arranged in fixed housing and bolt sleeve arranged in rotating housing;Magnetic docking mechanism includes height adjustment telescopic unit, magnetic chuck connected with height adjustment telescopic unit and guide interface corresponding with guide head and arranged on the side of magnetic chuck.The present application is suitable for the butt joint installation of segmented steel pipe, realizes that construction personnel does not need high-altitude work, can complete steel pipe pole flange hole and positioning bolt installation process, reduces the on-site installation difficulty and high-altitude work risk of segmented steel pipe.

Description

Technical Field

[0001] This invention relates to the field of overhead power transmission and distribution lines, and more specifically to a steel pipe pole assembly device for overhead power transmission and distribution lines. Background Technology

[0002] Overhead power transmission and distribution lines are mainly erected using three methods: angle steel towers, steel pipe towers, and steel pipe poles. Compared to the first two methods, steel pipe poles are more expensive to install, but they are widely used in urban areas due to their advantages such as requiring less land for corridors and having an aesthetically pleasing appearance.

[0003] Currently, steel pipe poles are generally prefabricated and galvanized in sections at the factory before being transported to the site for assembly using a disassembly and assembly process. The sections of steel pipe are connected by flange bolts. During the disassembly and assembly process, a crane lifts the upper section of steel pipe and slowly moves it to the vicinity of the upper end of the already installed lower section. Several workers then use traction to position and align the bolt holes of the upper and lower steel pipe flanges, with an allowable alignment accuracy of only 1-2 mm. Because the steel pipes weigh several tons to tens of tons, manual traction for high-precision hole alignment is not only difficult and inefficient, but also poses a high safety risk due to working at height. Summary of the Invention

[0004] The purpose of this invention is to provide a steel pipe pole assembly device for overhead power transmission and distribution lines. This device can overcome the shortcomings of the prior art and is suitable for the docking installation of segmented steel pipes. It enables construction personnel to complete the flange hole alignment and positioning bolt installation process of steel pipe poles without working at height, thereby reducing the difficulty of on-site installation of segmented steel pipes and the risk of working at height.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An assembly device for steel pipe poles used in overhead power transmission and distribution lines, the device being used for the docking and installation of two sections of steel pipe, includes a guiding mechanism, an automatic bolt installation mechanism, and a magnetic docking mechanism;

[0007] The guiding mechanism includes a guiding housing installed on the first section of steel pipe and a guiding head connected to the guiding housing;

[0008] The automatic bolt installation mechanism includes a fixed housing mounted on the second section of steel pipe, a rotating housing disposed within the cavity of the fixed housing, and a bolt sleeve disposed within the cavity of the rotating housing.

[0009] The magnetic docking mechanism includes a height-adjustable telescopic unit mounted on the fixed housing, a magnetic chuck connected to the height-adjustable telescopic unit, and a guide interface located on one side of the magnetic chuck and corresponding to the guide head.

[0010] Furthermore, the first section of steel pipe includes a first steel pipe body and a first flange disposed at one end of the first steel pipe body; a plurality of first stiffening plates are disposed on the first flange; and first flange bolt holes are disposed between two adjacent first stiffening plates on the first flange.

[0011] The second section of steel pipe includes a second steel pipe body and a second flange disposed at one end of the second steel pipe body; a plurality of second stiffening plates are disposed on the second flange; and second flange bolt holes are disposed between two adjacent second stiffening plates.

[0012] Furthermore, the interior of the guide housing is a variable-diameter circular cavity that is smaller at the top and larger at the bottom, and a nut sleeve is installed inside the larger diameter section of the variable-diameter circular cavity;

[0013] A positioning screw is provided at the bottom of the guide housing, which fixes the nut washer. A flange nut is placed in the nut sleeve above the nut washer. By adjusting the insertion length of the positioning bolt, the nut washer is tightened, thereby achieving a fixing effect.

[0014] The guide housing is mounted on the first stiffening plate by the first bolt; at least three first bolts are provided on the first stiffening plate. By changing the length of the first bolts extending into the area between the two first stiffening plates, the position of the guide housing on the first flange is adjusted so that the nut sleeve coincides with the central axis of the bolt hole of the first flange.

[0015] Furthermore, one end of the guide head is connected to the guide housing, and the other end is attracted by the magnetic chuck and docked with the guide interface to achieve the alignment and positioning of the first section of steel pipe and the second section of steel pipe.

[0016] Furthermore, a screw is provided at the top of the fixed housing, the screw being used to install a limiting strip, the limiting strip rotating about the screw as an axis under the action of external force;

[0017] The fixed housing is mounted on the second stiffening plate by a second bolt;

[0018] At least three second bolts are provided on the second stiffening plate. By changing the length of the second bolts 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 bolt hole of the second flange.

[0019] Furthermore, the rotating housing is connected to the bottom of the inner cavity of the fixed housing via a rotating shaft, and the rotating shaft is driven to rotate by a motor;

[0020] A valve position post is provided at the top of the rotating housing, and a first spring is provided in the inner cavity;

[0021] The bottom end of the first spring is fixed to the bottom of the inner cavity of the rotating housing, and the top end is connected to a pad.

[0022] A flange bolt is installed in the bolt sleeve. The flange bolt is located above the pad. The limiting strip holds the end of the flange bolt's thread, so that the flange bolt is completely located in the bolt sleeve. The first spring is in a compressed state.

[0023] The motor drives the rotating shaft to rotate via a remote control switch, causing the rotating housing to rotate. The rotating valve position post pushes the limit switch strip to rotate and move away from the top of the rotating housing. The flange bolt is pushed out by the first spring, so that its screw end passes through the second flange bolt hole, the first flange bolt hole, and the hole on the nut washer to enter the lower end of the flange nut. The rotation of the rotating housing continues to drive the bolt sleeve and the flange bolt therein to rotate until the flange bolt is screwed into the flange nut and tightened.

[0024] Furthermore, the height adjustment telescopic unit includes a base mounted on the fixed housing, a spring sleeve mounted on the base, a second spring disposed within the spring sleeve, and an adjustment rod with one end embedded within the spring sleeve; the other end of the adjustment rod is connected to the magnetic attraction docking mechanism.

[0025] Furthermore, a self-locking unit is provided between the guide interface and the magnetic chuck;

[0026] The self-locking unit includes a self-locking cavity, a self-locking spring disposed in the self-locking cavity, and a limiting block connected to the self-locking spring;

[0027] The self-locking unit is used for the guide head to enter the guide interface under the attraction of the magnetic chuck, and to be locked in the guide interface by the limiting block;

[0028] A position sensor is installed in the self-locking cavity.

[0029] Furthermore, the guiding interface is a horn-shaped interface made of a non-ferromagnetic material with high wear resistance and low friction coefficient;

[0030] The end of the guide head that mates with the guide interface is a steel spherical surface.

[0031] Furthermore, the magnetic suction cup includes a permanent magnet array and a remote control rotary switch, wherein the permanent magnet array includes a fixed permanent magnet array and a movable permanent magnet array;

[0032] The magnetic force of the magnetic chuck can be adjusted by changing the position of the movable permanent magnet array using the remote control knob switch.

[0033] Compared with the prior art, the advantages of the present invention are:

[0034] (1) This invention is applicable to the butt joint installation of segmented steel pipes. Through the close cooperation of the guiding mechanism, the magnetic butt joint mechanism, and the automatic bolt installation mechanism, construction personnel can complete the flange hole alignment and positioning bolt installation processes of steel pipe poles without having to work at heights. This invention reduces manpower through intelligentization and mechanization, not only making the steel pipe butt joint and bolt installation processes continuous and improving construction assembly efficiency, but also reducing the on-site installation difficulty of segmented steel pipes and the safety risks of personnel working at heights.

[0035] (2) The segmented steel pipes are connected by flange bolts, and the alignment accuracy is only allowed to deviate by 1-2mm. It is difficult to achieve such high-precision automatic docking through hoisting. At present, construction mainly uses manual traction positioning, which is inefficient and has high risks of high-altitude operation. This invention proposes a horn-shaped design for the guide interface. During hoisting, the guide head only needs to be moved to the horn-shaped area of ​​the guide interface to complete the subsequent docking operation, which significantly increases the hoisting positioning area and reduces the hoisting accuracy requirements and construction difficulty.

[0036] (3) When the guide head enters the flared area of ​​the guide interface, if the conventional method of adjusting the vertical or horizontal position of the guide head using hoisting equipment is used to further complete the subsequent docking, the adjustment range is difficult to control, causing the guide head to detach from the guide interface again, resulting in repeated docking. Based on this, the present invention proposes a magnetic chuck, which innovatively uses magnetic force to attract the steel guide head, adding 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 is made of a non-ferromagnetic material with high wear resistance and low friction coefficient, which fully reduces the friction between the guide head and the guide interface contact surface, improves the sensitivity of the guide head under magnetic force, and significantly improves the docking efficiency.

[0037] (4) The present invention proposes a height-adjustable telescopic unit, whose adjusting rod and spring work together to not only adjust the height of the guide interface under the action of the vertical component force generated during the contact between the guide head and the guide interface, thereby improving the device's autonomous correction performance; but also reduce the impact force and improve stability during the downward movement of the upper section of the steel pipe after docking is completed by spring buffering.

[0038] (5) High-altitude hoisting and docking operations are subject to interference from factors such as inertial impact and wind load. If the docking is not secured in time after successful docking, it is easy to detach and lead to repeated docking. This invention proposes a self-locking unit. Once docking is successful, the guide head can be immediately locked in the guide interface by the limit block, which can fix the docking result in time and avoid repeated docking.

[0039] (6) The present invention proposes an automatic bolt installation mechanism. After the flanges on the upper and lower sections of the steel pipe are successfully connected, the construction personnel can control the motor through a remote control switch on the ground to drive the bolt sleeve to rotate and complete the initial tightening of the flange bolts, thus avoiding the construction personnel from working at height and significantly improving the assembly efficiency. The bolt sleeve and nut sleeve in the automatic bolt installation mechanism can be replaced with different models according to different specifications of flange bolts, which has high compatibility. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the steel pipe pole assembly device for overhead power transmission and distribution lines in this invention;

[0041] Figure 2 This is a top view of the first flange of the first steel pipe in this invention;

[0042] Figure 3 This is a top view of the second flange of the second steel pipe in this invention;

[0043] Figure 4 for Figure 1 Enlarged view of section A;

[0044] Figure 5 This is a side view of the guide housing in this invention;

[0045] Figure 6a This is a side view of the automatic bolt installation mechanism in this invention;

[0046] Figure 6b This is a side view of the automatic bolt installation mechanism in this invention (excluding the flange and stiffening plate);

[0047] Figure 6c This is a top view of the automatic bolt installation mechanism in this invention (excluding the flange and stiffening plate);

[0048] Figure 6d This is a diagram showing the change in the state of the limit clamp strip during the operation of the automatic bolt installation mechanism in this invention (excluding the flange and stiffening plate);

[0049] Figure 7 This is a top view of the magnetic attraction docking mechanism in this invention;

[0050] Figure 8 This is a side view of the guidance interface in this invention.

[0051] in:

[0052] 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. 21. Bolt sleeve, 22. Flange bolt, 23. First spring, 24. Pad, 25. Rotating shaft, 26. Limiting strip, 27. Screw, 28. Valve position post, 29. Magnetic chuck, 30. Guide interface, 31. Inner wall of guide interface, 32. Self-locking unit, 33. Self-locking cavity, 34. Self-locking spring, 35. Limiting block, 36. Permanent magnet array, 37. Remote control rotary switch, 38. Adjusting rod, 39. Spring sleeve, 40. Second spring, 51. Base. Detailed Implementation

[0053] The present invention will be further described below with reference to the accompanying drawings:

[0054] like Figure 1 The device shown is an assembly device for steel pipe poles used in overhead power transmission and distribution lines. The device is used for the docking and installation of two sections of steel pipes and includes a guiding mechanism, an automatic bolt installation mechanism, and a magnetic docking mechanism.

[0055] like Figure 1 , Figure 2 and Figure 3 As shown, the two steel pipes are divided into a first steel pipe 1 and a second steel pipe 2. In this embodiment, the first steel pipe 1 is the upper steel pipe, and the second steel pipe 2 is the lower steel pipe. Through a guiding mechanism and a magnetic docking mechanism, the two steel pipes achieve precise docking and positioning in the vertical direction. The first steel pipe 1 includes a first steel pipe body and a first flange 3 disposed at one end of the first steel pipe body; a plurality of first stiffening plates 5 are disposed on the first flange 3; and first flange bolt holes 7 are disposed on the first flange 3. The second steel pipe 2 includes a second steel pipe body and a second flange 4 disposed at one end of the second steel pipe body; a plurality of second stiffening plates 6 are disposed on the second flange 4; and second flange bolt holes 8 are disposed on the second flange 4.

[0056] like Figure 4 and Figure 5As shown, the guiding mechanism includes a guiding housing 9 mounted on the first section of steel pipe 1 and a guiding head 11 connected to the guiding housing 9. The guiding housing 9 has a variable-diameter circular cavity 12, smaller at the top and larger at the bottom, with a nut sleeve 13 installed inside the larger diameter section of the cavity 12. The guiding housing 9 is mounted between two first stiffening plates 5 by first bolts 10. At least three first bolts 10 are installed on each of the first stiffening plates 5. By changing the length of the first bolts 10 extending into the area between the two first stiffening plates 5, the position of the guiding housing 9 on the first flange 3 is adjusted, so that the nut sleeve 13 coincides with the central axis of the bolt hole 7 on the first flange. One end of the guiding head 11 is connected to the guiding housing 9, and the other end is used to cooperate with the guiding interface 29 and the magnetic chuck 28 to achieve alignment and positioning of the first section of steel pipe 1 and the second section of steel pipe 2. The guiding mechanism, the magnetic docking mechanism, and the automatic bolt installation mechanism are configured 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 set along the outer circumference of the steel pipes. One set is docked and positioned first, and then the other set is docked and positioned. After both sets are docked and positioned, it ensures that all corresponding flange bolt holes on the first flange 3 and the second flange 4 are aligned, thus achieving precise matching of the assembly positions of the upper and lower steel pipe sections.

[0057] like Figure 4 , Figure 7 and Figure 8 As shown, the magnetic docking mechanism includes a height-adjustable telescopic unit mounted on a fixed housing 17, a magnetic chuck 28 connected to the height-adjustable telescopic unit, and a guide interface 29 located on one side of the magnetic chuck 28 and corresponding to the guide head 11. The guide interface 29 is a horn-shaped structure made of a non-ferromagnetic material with high wear resistance and low friction coefficient, with a gradually decreasing inner diameter; the end of the guide head 11 that mates with the guide interface 29 is a steel spherical surface. The inner wall 30 of the guide interface is a smooth conical surface. The segmented steel pipes are connected by flange bolts, and the alignment accuracy is only allowed to deviate by 1-2 mm. It is difficult to achieve such high-precision automatic docking through hoisting. Currently, construction mainly uses manual traction positioning, which is inefficient and poses a high risk of high-altitude operations. This invention proposes a horn-shaped design for the guide interface. During hoisting, the guide head only needs to be moved to the horn-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 guide head and the guide interface can be reduced, the resistance during the docking process can be reduced, and the guide head can move along the guide interface towards the magnetic chuck under the magnetic attraction of the magnetic chuck.

[0058] Once the guide head enters the flared area of ​​the guide interface, if the conventional method of adjusting the vertical or horizontal position of the guide head using hoisting equipment is used to further complete the subsequent docking, the guide head may easily detach from the guide interface again due to the difficulty in controlling the adjustment range, resulting in repeated docking. Based on this, this invention innovatively proposes a magnetic chuck, utilizing magnetic force to attract the steel guide head, adding magnetic traction during the hoisting and docking process. Furthermore, the guide head adopts a steel spherical design, and the inner wall of the guide interface is made of a non-ferromagnetic material with high wear resistance and low friction coefficient, significantly reducing the friction between the guide head and the guide interface contact surface, improving the sensitivity of the guide head under magnetic force, and significantly improving docking efficiency. During the process of the crane lifting the upper steel pipe and moving it above the lower steel pipe for docking, the upper steel pipe only needs to be roughly positioned so that the guide head is within the flared area of ​​the guide interface, with the two being very close. At this time, the ground construction personnel open the magnetic docking mechanism through the remote control switch, so that the magnetic chuck generates a strong magnetic force. Under the magnetic attraction, the guide head quickly and accurately connects to 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.

[0059] like Figure 4 As shown, the height adjustment 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 adjusting rod 37 with one end embedded within the spring sleeve 38; the other end of the adjusting rod 37 is connected to the magnetic docking mechanism. The adjusting rod, in conjunction with the spring sleeve, not only adjusts the height of the guide interface under the vertical force generated during the contact between the guide head and the guide interface, improving the device's autonomous correction performance, but also reduces impact and improves stability during the descent of the upper steel pipe after docking, thanks to the buffering effect of the second spring.

[0060] Furthermore, a self-locking unit 31 is provided between the guide interface 29 and the magnetic chuck 28. The self-locking unit 31 is used for the guide head 11 to enter the guide interface 29 and lock within it under the attraction of the magnetic chuck 28. The self-locking unit includes a self-locking cavity 32, a self-locking spring 33 disposed within the self-locking cavity 32, and a limiting block 34 connected to the self-locking spring 33. A position sensor is disposed within the self-locking cavity 32. By setting up the self-locking unit, once docking is successful, the guide head can be immediately locked in the guide interface by the limiting block, promptly securing the docking result and avoiding repeated docking due to inertial impacts, wind loads, and other factors during hoisting and docking, thus ensuring the stability of the docking result. By setting up the position sensor, a signal can be sent to the ground after docking is completed, informing ground personnel of the docking result of the steel pipe.

[0061] Furthermore, the magnetic chuck 28 includes a permanent magnet array 35 and a remote control rotary switch 36. The permanent magnet array 35 includes a fixed permanent magnet array and a movable permanent magnet array. The magnetic force of the magnetic chuck 28 is adjusted by changing the position of the movable permanent magnet array through the remote control rotary switch 36. During the docking and positioning assembly of the two steel pipe sections, construction personnel do not need to work at heights. They can use a remote control equipped with a signal transmitting unit to send control commands to the remote control rotary switch equipped with a signal receiving unit from the ground. The remote control rotary switch drives the rotating shaft to rotate according to the commands, adjusting the position of the movable permanent magnet array on the shaft, thereby adjusting the magnetic force of the entire magnetic chuck.

[0062] like Figure 5 As shown, a positioning screw 16 is provided at the bottom of the guide housing 9; the positioning screw 16 fixes the nut washer 15, and the flange nut 14 is placed in the nut sleeve 13 and located above the nut washer 15. The inner wall shape of the nut sleeve 13 is adapted to the contour shape of the flange nut 14. The nut sleeve 13 is placed in the large-diameter section of the variable-diameter circular cavity 12, and when the flange bolt 21 and the flange nut 14 are assembled, the nut sleeve 13 and the guide housing 9 remain relatively stationary. When using different models of flange nuts 14, it is only necessary to replace the nut sleeve 13 with one that matches the model of the flange nut 14.

[0063] As shown in Figure 6, the automatic bolt installation mechanism includes a fixed housing 17 mounted on a second stiffening plate 6 by second bolts 18, a rotating housing 19 disposed within the cavity of the fixed housing 17, and a bolt sleeve 20 disposed within the cavity of the rotating housing 19. A screw 26 is provided at the top of the fixed housing 17, which is used to install a limiting strip 25. The limiting strip 25 rotates around the screw 26 as an axis under external force. At least three second bolts 18 are provided on the second stiffening plate 6. By changing 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 bolt hole 8 of the second flange. The rotating housing 19 is connected to the bottom of the cavity of the fixed housing 17 by a rotating shaft 24, which is driven to rotate by a motor. The rotating housing 19 has a valve position post 27 at its top and a first spring 22 inside its 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 pad 23. A flange bolt 21 is placed in the bolt sleeve 20, and the flange bolt 21 is located above the pad 23. The limiting strip 25 holds the end of the flange bolt 21 in place, so that the flange bolt 21 is completely located in the bolt sleeve 20, and 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 to drive the rotating shaft 24 to rotate the rotating housing 19 via a remote control switch. The rotating valve position post 27 pushes the limiting strip 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, so that its end passes through the hole of the second flange bolt hole 8, the first flange bolt hole 7, and the nut washer 15 and enters the lower end of the flange nut 14. The rotating housing 19 continues to rotate, driving the bolt sleeve 20 and the flange bolt 21 within it to rotate, causing the flange bolt 21 to be screwed into the flange nut 14 until tightened. The rotating housing is placed inside the fixed housing, and the bolt sleeve is placed inside 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 outline shape of the flange bolt. When using different types of flange bolts, only the bolt sleeve matching the flange bolt type needs to be replaced, improving the versatility of the device described in this invention. By setting up an automatic bolt installation mechanism, the steel pipe connection and initial bolt tightening processes are realized in a continuous manner, intelligently reducing manpower and mechanizing the process, significantly improving assembly efficiency. The bolt sleeve and nut sleeve in the automatic bolt installation device can be replaced with different models to match different specifications of flange bolts, improving equipment compatibility. Both the magnetic connection unit and the automatic bolt installation unit are remotely controlled, allowing construction personnel to operate from the ground, avoiding personnel climbing the tower and reducing the risks of high-altitude operations.

[0064] The construction method of the above-mentioned device is as follows:

[0065] (1) Before assembling the second section of steel pipe 2, i.e., before assembling the lower section of steel pipe, place the flange bolts 21 into the bolt sleeve 20 on the ground. The limiting clip 25 holds the bolt ends of the flange bolts 21 in place, ensuring all flange bolts 21 are within the bolt sleeve 20, and the first spring 22 is compressed. Secure the automatic bolt installation mechanism to the second stiffening plate 6. Adjust the second bolt 18 to align the bolt sleeve 20 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 via the base 40, is also positioned on the second section of steel pipe 2.

[0066] (2) Before assembling the first section of steel pipe 1, place the flange nut 14 into the nut sleeve 13 on the ground, install the nut washer 15 and tighten it with the positioning screw 16. Secure 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.

[0067] (3) After the second section of steel pipe 2 is assembled, the first section of steel pipe 1 is lifted by a crane and moved above the second section of steel pipe 2. The guide head 11 approaches the horn-shaped guide interface 29. When the spherical surface of the guide head 11 contacts the inner wall 30 of the horn-shaped guide interface, the ground staff turns on the remote control knob switch 36, and the magnetic field of the magnetic chuck 28 is activated, attracting the guide head 11 to slide into the guide interface 29 along the inner wall 30 of the horn-shaped guide interface. During the process of the guide head 11 sliding into the guide interface 29, the guide head 11 will squeeze the limiting block 34 of the self-locking unit 31 to compress the self-locking spring 33. The guide head 11 passes through the limiting block 34 of the self-locking unit 31 and continues to move towards the magnetic chuck 28. When the spherical surface of the guide head 11 is fully inserted into the inner side of the limiting block 34 (the end away from the guide interface), the compressed self-locking spring 33 will reset, causing the limiting block 34 to return to its original position, thereby locking the guide head 11 between the limiting block 34 and the magnetic chuck 28. At this time, the centers of the first flange bolt hole 7 and the second flange bolt hole 8 are aligned.

[0068] (4) The crane slowly releases, and the magnetic chuck 28 connected to the first section of steel pipe 1 descends slowly and steadily by pressing down the adjusting rod 37 of the height adjustment telescopic unit, compressing the second spring 39 until the first flange 3 falls onto the second flange 4. At this time, the ground staff controls the motor drive shaft 24 to rotate the rotating housing 19 via a remote control switch. The rotating valve position post 27 pushes the limit strip 25 to rotate and leave the top of the rotating housing 19. The flange bolt 21 is pushed out by the first spring 22, so that its screw end passes through the hole of the second flange bolt hole 8, the first flange bolt hole 7, and the hole of the nut washer 15 and enters the lower end of the flange nut 14. The rotation of the rotating housing 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.

[0069] In summary, this invention is applicable to the butt joint installation of segmented steel pipes. Through the close cooperation of the guiding mechanism, the magnetic butt joint mechanism, and the automatic bolt installation mechanism, construction personnel can complete the flange hole alignment and positioning bolt installation processes without having to work at heights. This invention, by intelligently reducing manpower and mechanizing processes, not only makes the steel pipe butt joint and bolt installation processes seamless, improving construction and assembly efficiency, but also reduces the on-site installation difficulty of segmented steel pipes and the safety risks of personnel working at heights.

[0070] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A steel pipe pole assembly device for overhead power transmission and distribution lines, characterized in that, This device is used for the docking installation of two steel pipe sections, and includes a guiding mechanism, an automatic bolt installation mechanism, and a magnetic docking mechanism; The guiding mechanism includes a guiding housing installed on the first section of steel pipe and a guiding head connected to the guiding housing; The automatic bolt installation mechanism includes a fixed housing mounted on the second section of steel pipe, a rotating housing disposed within the cavity of the fixed housing, and a bolt sleeve disposed within the cavity of the rotating housing. The magnetic docking mechanism includes a height adjustment telescopic unit installed on the fixed housing, a magnetic chuck connected to the height adjustment telescopic unit, and a guide interface disposed on one side of the magnetic chuck and corresponding to the guide head. A screw is provided at the top of the fixed housing. The screw is used to install the limiting strip. The limiting strip rotates about the screw as an axis under the action of external force. The rotating housing is connected to the bottom of the inner cavity of the fixed housing via a rotating shaft, which is driven to rotate by a motor. A valve position post is provided at the top of the rotating housing, and a first spring is provided in the inner cavity; The bottom end of the first spring is fixed to the bottom of the inner cavity of the rotating housing, and the top end is connected to a pad. A flange bolt is installed in the bolt sleeve. The flange bolt is located above the pad. The bolt end of the flange bolt is held in place by a limiting strip, so that the flange bolt is completely located in the bolt sleeve. The first spring is in a compressed state.

2. The apparatus according to claim 1, characterized in that, The first section of steel pipe includes a first steel pipe body and a first flange disposed at one end of the first steel pipe body; a plurality of first stiffening plates are disposed on the first flange; and first flange bolt holes are disposed between two adjacent first stiffening plates on the first flange. The second section of steel pipe includes a second steel pipe body and a second flange disposed at one end of the second steel pipe body; a plurality of second stiffening plates are disposed on the second flange; and second flange bolt holes are disposed between two adjacent second stiffening plates.

3. The apparatus according to claim 2, characterized in that, The guide housing has an interior of a variable-diameter circular cavity that is smaller at the top and larger at the bottom, and a nut sleeve is installed inside the larger diameter section of the variable-diameter circular cavity. The bottom end of the guide housing is provided with a positioning screw, the positioning screw fixes the nut washer, and a flange nut is placed in the nut sleeve above the nut washer; The guide housing is mounted on the first stiffening plate by the first bolt; at least three first bolts are provided on the first stiffening plate. By changing the length of the first bolts extending into the area between the two first stiffening plates, the position of the guide housing on the first flange is adjusted so that the nut sleeve coincides with the central axis of the bolt hole of the first flange.

4. The apparatus according to claim 1, characterized in that, One end of the guide head is connected to the guide housing, and the other end is attracted by the magnetic chuck and docked with the guide interface to achieve the alignment and positioning of the first section of steel pipe and the second section of steel pipe.

5. The apparatus according to claim 3, characterized in that, 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. By changing the length of the second bolts 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 bolt hole of the second flange.

6. The apparatus according to claim 5, characterized in that, The motor drives the rotating shaft to rotate via a remote control switch, causing the rotating housing to rotate. The rotating valve position post pushes the limit switch strip to rotate and move away from the top of the rotating housing. The flange bolt is pushed out by the first spring, so that its screw end passes through the second flange bolt hole, the first flange bolt hole, and the hole on the nut washer to enter the lower end of the flange nut. The rotation of the rotating housing continues to drive the bolt sleeve and the flange bolt therein to rotate until the flange bolt is screwed into the flange nut and tightened.

7. The apparatus according to claim 1, characterized in that, The height adjustment telescopic unit includes a base mounted on the fixed housing, a spring sleeve mounted on the base, a second spring disposed within the spring sleeve, and an adjustment rod with one end embedded within the spring sleeve; the other end of the adjustment rod is connected to the magnetic attraction docking mechanism.

8. The apparatus according to claim 1, characterized in that, A self-locking unit is provided between the guide interface and the magnetic chuck; The self-locking unit includes a self-locking cavity, a self-locking spring disposed in the self-locking cavity, and a limiting 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 chuck, and to be locked in the guide interface by the limiting block; A position sensor is installed in the self-locking cavity.

9. The apparatus according to claim 1, characterized in that, The guiding interface is a horn-shaped interface made of non-ferromagnetic material; The end of the guide head that mates with the guide interface is a steel spherical surface.

10. The apparatus according to claim 1, characterized in that, The magnetic suction cup includes a permanent magnet array and a remote control knob switch, wherein the permanent magnet array includes a fixed permanent magnet array and a movable permanent magnet array; The magnetic force of the magnetic chuck can be adjusted by changing the position of the movable permanent magnet array using the remote control knob switch.

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