An overhead transmission line bolt self-adapting centering and tightening device

Abstract

This invention discloses an adaptive centering and tightening device for bolts in overhead transmission lines, relating to the field of power line installation. It solves the problem of poor working posture stability in existing overhead transmission line bolt centering and tightening devices, leading to low tightening accuracy and operational safety. The device includes a body, a support mechanism, a drive motor, and a bolt sleeve. The support mechanism comprises a semi-circular ring, an arc-shaped plate, a support member, and a clamping member. A guide groove is provided on the outer wall of the semi-circular ring. This invention supports and adjusts the body through the support member, and uses the clamping member to connect the body to the power line for auxiliary positioning, preventing the body from falling during operation. Furthermore, during the operation of the drive motor, the internal structure of the support mechanism provides linkage control to further limit the positioning of the support member and the clamping member, ensuring the body is rigidly supported outside the power line. The power line provides auxiliary support to the body, reducing shaking during tightening and improving the stability of the bolt centering and tightening process.

Description

Technical Field

[0001] This invention relates to the field of power line installation technology, specifically to an adaptive centering and tightening device for bolts in overhead transmission lines. Background Technology

[0002] Overhead transmission lines are the core infrastructure of power transmission networks. The connection points of the line towers, clamps, and current-carrying plates are all secured with bolts. Transmission lines are constantly exposed to the complex environment of high altitudes, and are susceptible to factors such as wind vibrations, temperature variations, and changes in line load. This makes the connecting bolts prone to loosening and slippage. Failure to tighten them promptly can lead to safety hazards such as loose connections, overheating, electrical discharges, and even line faults and power outages. Therefore, regular tightening and re-inspection of high-altitude bolts is a core routine task in power operation and maintenance.

[0003] Currently, bolt tightening operations on overhead transmission lines mainly rely on workers using handheld electric tightening equipment at height. The working environment lacks fixed support points, and the hands are easily affected by wind resistance, limb swaying, and operator fatigue, leading to hand vibrations. This results in misalignment between the tightening sleeve and the bolt head, poor coaxiality during tightening, and a high risk of bolt misalignment, stripped threads, and uneven preload. This significantly reduces bolt tightening accuracy and work quality. Existing fall protection methods for high-altitude tightening equipment are limited to flexible safety ropes. These ropes only provide basic fall protection and lack rigid support, failing to provide auxiliary force support for the tightening operation and thus failing to address the core issue of operational swaying. Summary of the Invention

[0004] The purpose of this invention is to provide an adaptive centering and tightening device for bolts of overhead transmission lines that facilitates improved operational stability and construction safety, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adaptive centering and tightening device for bolts on overhead transmission lines, comprising a body and a support mechanism. The body is equipped with a drive motor and a bolt sleeve. The support mechanism includes two sets of semicircular rings, with one side edge of each set of semicircular rings hinged together and capable of closing to form a complete ring. A guide groove is formed on the outer wall of each semicircular ring, and an arc-shaped plate is slidably connected within the guide groove. Support members for supporting and adjusting the body are provided on the side of the arc-shaped plate. The semicircular ring is equipped with a control mechanism for adjusting the bolt alignment. The clamping member in the outer wall clamping state, the support mechanism can connect the machine body to the wire for auxiliary limiting through the support member and the clamping member, to prevent the machine body from falling during operation. In addition, when the drive motor is running, it will also assist in limiting the support member and the clamping member, so that the machine body can be rigidly supported outside the wire. The wire provides auxiliary support for the machine body, reducing the shaking of the machine body during tightening, improving the stability of the bolt centering and tightening process, and facilitating the improvement of operation stability and construction safety.

[0006] Preferably, the support includes a fixed frame fixedly installed on the side of the arc-shaped plate, a sliding frame slidably sleeved on the outer wall of the fixed frame, a rotating disk rotatably connected to the side of the sliding frame away from the fixed frame, a fixing buckle fixedly connected to both the rotating disk and the side of the machine body, a rotating rod rotatably connected between the two sets of fixing buckles, and limiting components provided in the fixed frame and the rotating rod for assisting in limiting the various connection positions when the drive motor is running, so as to facilitate the support and adjustment of the machine body.

[0007] Preferably, the clamping member includes multiple sets of sliding blocks evenly installed on the semicircular ring. Multiple sets of sliding grooves are evenly formed inside the semicircular ring. The sliding blocks are slidably connected to the inner walls of the sliding grooves. A rolling cavity is formed on the sliding block, and a ball bearing is rolled inside the rolling cavity. A first tension spring is fixedly connected to the sliding block inside the sliding groove. An arc-shaped groove is formed on the semicircular ring to connect the multiple sets of sliding grooves. A first serpentine tube is fixedly connected between two semicircular rings. The two ends of the first serpentine tube are respectively connected to the arc-shaped grooves on the two sets of semicircular rings, which facilitates control of the clamping state of the wire outer wall.

[0008] Preferably, the limiting component includes an elastic cloth fixedly installed on the arc-shaped plate. An elastic pull rope fixedly connected to the side of the elastic cloth and fixedly connected to the arc-shaped plate is provided. The side of the elastic cloth away from the elastic pull rope can slide against the inner wall of the guide groove. A second tension spring is fixedly connected inside the fixed frame. A first brake pad is fixedly connected to one end of the second tension spring. The first brake pad is slidably connected to the inner wall of the fixed frame. The side of the first brake pad away from the second tension spring can abut against the inner wall of the sliding frame. The rotating rod is provided with a positioning component for limiting the connection with the fixed buckle, which facilitates the limiting of each connection position when the drive motor is running.

[0009] Preferably, the positioning component includes multiple sets of second brake pads mounted on the rotating rod. The surface of the second brake pads can fit against the outer wall of the fixing buckle. A third tension spring is fixedly connected to the side of the second brake pad away from the fixing buckle. A connecting groove is provided inside the rotating rod. The second brake pads slide against the inner wall of the connecting groove. The machine body is provided with a pressurizing component for inflating and pressurizing the connecting groove and the fixing frame in conjunction with the operation of the drive motor, so as to limit the rotation rod and the fixing buckle.

[0010] Preferably, the pressurizing component includes a pressurizing box fixedly installed inside the machine body, a drive shaft is provided at the output end of the drive motor, the bolt sleeve is installed on the drive shaft, a first bevel gear is coaxially fixedly connected to the drive shaft, a second bevel gear meshing with the first bevel gear is rotatably connected inside the machine body, a pressurizing rod is rotatably connected to the non-center position of the side of the second bevel gear, a pressurizing plate is slidably connected inside the pressurizing box, one end of the pressurizing rod is rotatably connected to the side of the pressurizing plate, and a conveying component for directional conveying of fluid is provided on the pressurizing box, so as to facilitate the simultaneous inflation and pressurization of the connecting groove and the fixed frame when the drive motor is running.

[0011] Preferably, the conveying component includes a second serpentine tube fixedly installed on the pressurizing box, the end of the second serpentine tube away from the pressurizing box being connected to the fixed frame, a third serpentine tube connected to the arc-shaped groove being connected to the fixed frame, the fixed frame being connected to the sliding frame, and a fourth serpentine tube connected to the sliding frame being connected to the sliding frame, the fourth serpentine tube being connected to the connecting groove, which facilitates the directional conveying of fluid.

[0012] Preferably, the pressurizing box is provided with a one-way inlet valve for controlling the one-way input of gas into the pressurizing box, and a one-way exhaust valve for controlling the one-way delivery of gas from the pressurizing box into the second serpentine tube is fixedly connected inside the second serpentine tube, so as to facilitate the one-way control of the airflow direction to achieve the effect of pressurization and inflation.

[0013] Preferably, a third brake pad is slidably connected inside the sliding frame, and an elastic element that is fixedly connected to the inner wall of the sliding frame is fixedly connected to the side of the third brake pad near the rotating disk, so that when the air pressure inside the sliding frame increases, the third brake pad can be pushed to squeeze the rotating disk and prevent the rotating disk from continuing to rotate significantly.

[0014] Preferably, a control valve for controlling the gas intensity in the arc-shaped groove is fixedly connected to the semi-circular ring. The control valve can automatically open and vent gas when the gas pressure in the arc-shaped groove is greater than a set value, so that the gas pressure in the arc-shaped groove is reduced to the set value and then closed. A connecting latch is provided between the two sets of semi-circular rings to prevent the gas pressure inside the arc-shaped groove from continuously increasing and damaging the outer wall of the wire.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention provides an adaptive centering and tightening device for bolts in overhead transmission lines, which solves the problem of poor working posture stability in existing overhead transmission line bolt centering and tightening devices, resulting in low tightening accuracy and operational safety. The device uses a support member to support and adjust the machine body, and a clamping member to connect the machine body to the power line for auxiliary limiting, preventing the machine body from falling during operation. Furthermore, when the drive motor is running, the internal structure of the support mechanism provides linkage control to further limit the support member and clamping member, ensuring the machine body is rigidly supported outside the power line. The power line provides auxiliary support to the machine body, reducing shaking during tightening and improving the stability of the bolt centering and tightening process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support mechanism structure of the present invention; Figure 3 This is a partial structural cross-sectional view of the support mechanism of the present invention; Figure 4 for Figure 3 Enlarged view of region A in the middle; Figure 5 for Figure 3 Enlarged view of region B in the middle; Figure 6 for Figure 3 Enlarged view of region C; Figure 7 This is a partial structural cross-sectional view of the support member of the present invention; Figure 8 for Figure 7 Enlarged view of region D in the middle; Figure 9 This is a partial structural diagram of the support mechanism of the present invention; Figure 10 for Figure 9 Enlarged view of region E in the middle.

[0017] In the diagram: 1-Main body; 2-Drive motor; 3-Bolt sleeve; 4-Semi-circular ring; 5-Guide groove; 6-Arc plate; 7-Fixed frame; 8-Sliding frame; 9-Rotating disk; 10-Fixing buckle; 11-Rotating rod; 12-Sliding block; 13-Sliding groove; 14-Rolling cavity; 15-Ball; 16-First tension spring; 17-Arc groove; 18-First serpentine tube; 19-Elastic cloth; 20-Elastic pull rope; 21-Second tension spring; 22-First brake 23-Second brake pad; 24-Third tension spring; 25-Connecting groove; 26-Pressure box; 27-Drive shaft; 28-First bevel gear; 29-Second bevel gear; 30-Pressure rod; 31-Pressure plate; 32-Second serpentine tube; 33-Third serpentine tube; 34-Fourth serpentine tube; 35-One-way intake valve; 36-One-way exhaust valve; 37-Third brake pad; 38-Elastic element; 39-Control valve; 40-Connecting latch; 41-Wire. Detailed Implementation

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

[0019] Please see Figures 1-10 This invention provides a technical solution: an adaptive centering and tightening device for bolts on overhead transmission lines, comprising a body 1 and a support mechanism. The body 1 is equipped with a drive motor 2 and a bolt sleeve 3. The drive motor 2 is preferably a YYHS-40 model. The support mechanism includes two sets of semicircular rings 4, with one side edge of each set of semicircular rings 4 hinged together to form a complete ring. A guide groove 5 is provided on the outer wall of each semicircular ring 4, and an arc-shaped plate 6 is slidably connected within the guide groove 5. Supporting components for supporting and adjusting the body 1 are provided on the side of the arc-shaped plate 6. The semicircular rings 4 are equipped with… There are clamping components for controlling the clamping state of the outer wall of the wire 41. The support mechanism can connect the machine body 1 to the wire 41 through the support components and clamping components for auxiliary limiting, so as to prevent the machine body 1 from falling off during operation. When the drive motor 2 is running, it will also link the support components and clamping components for auxiliary limiting, so that the machine body 1 can be rigidly supported on the outside of the wire 41. The wire 41 provides auxiliary support for the machine body 1, reducing the shaking of the machine body 1 during tightening and improving the stability of the bolt centering and tightening process. A connecting lock 40 is provided between the two sets of semicircular rings 4.

[0020] Please see Figures 2-8The supporting components shown in the figure include a fixed frame 7 fixedly installed on the side of the arc plate 6, a sliding frame 8 slidably sleeved on the outer wall of the fixed frame 7, a rotating disk 9 rotatably connected to the side of the sliding frame 8 away from the fixed frame 7, fixed buckles 10 fixedly connected to the side of the rotating disk 9 and the machine body 1 respectively, and a rotating rod 11 rotatably connected between the two sets of fixed buckles 10. The fixed frame 7 and the rotating rod 11 are provided with limiting components for assisting in limiting the various connection positions when the drive motor 2 is running. The limiting components include an elastic cloth 19 fixedly installed on the arc plate 6, and an elastic pull rope 20 fixedly connected to the side of the elastic cloth 19 and fixedly connected to the arc plate 6. The side of the elastic cloth 19 away from the elastic pull rope 20 can slide against the inner wall of the guide groove 5. A second tension spring 21 is fixedly connected inside the fixed frame 7. A first brake pad 22 is fixedly connected to one end of the second tension spring 21. The first brake pad 22 is slidably connected to the inner wall of the fixed frame 7. The side of the first brake pad 22 away from the second tension spring 21 can abut against the inner wall of the sliding frame 8. A positioning element is provided on the rotating rod 11 for limiting the position with the fixed buckle 10. A third brake pad 37 is slidably connected inside the sliding frame 8. An elastic element 38 fixedly connected to the inner wall of the sliding frame 8 is fixedly connected to the side of the third brake pad 37 near the rotating disk 9.

[0021] Please see Figures 1-6 The clamping component shown in the figure includes multiple sets of sliding blocks 12 evenly installed on a semi-circular ring 4. Multiple sets of sliding grooves 13 are evenly opened inside the semi-circular ring 4. The sliding blocks 12 are slidably connected to the inner wall of the sliding grooves 13. A rolling cavity 14 is opened on the sliding block 12. A ball bearing 15 is rolled and connected in the rolling cavity 14. A first tension spring 16 is fixedly connected to the sliding block 12 in the sliding groove 13. An arc-shaped groove 17 is opened on the semi-circular ring 4 to connect the multiple sets of sliding grooves 13. A first serpentine tube 18 is fixedly connected between two semi-circular rings 4. The two ends of the first serpentine tube 18 are respectively connected to the arc-shaped grooves 17 on the two sets of semi-circular rings 4. A control valve 39 is fixedly connected on the semi-circular ring 4 to control the gas intensity in the arc-shaped groove 17. The control valve 39 can automatically open and exhaust gas when the gas pressure in the arc-shaped groove 17 is greater than the set value, so that the gas pressure in the arc-shaped groove 17 is reduced to the set value and then closed.

[0022] Please see Figures 3-10The positioning components shown in the figure include multiple sets of second brake pads 23 mounted on the rotating rod 11. The surface of the second brake pads 23 can fit against the outer wall of the fixing buckle 10. A third tension spring 24 is fixedly connected to the side of the second brake pads 23 away from the fixing buckle 10. A connecting groove 25 is opened in the rotating rod 11, and the second brake pads 23 slide against the inner wall of the connecting groove 25. The machine body 1 is provided with a pressurizing component for inflating and pressurizing the connecting groove 25 and the fixing frame 7 in conjunction with the operation of the drive motor 2. The pressurizing component includes a pressurizing box 26 fixedly installed in the machine body 1. The output end of the drive motor 2 is provided with a drive shaft 27. A bolt sleeve 3 is installed on the drive shaft 27. A first bevel gear 28 is coaxially fixedly connected to the drive shaft 27. A second bevel gear 29 that meshes with the first bevel gear 28 is rotatably connected in the machine body 1. The side of the second bevel gear 29 is located at a non-center position. A pressure rod 30 is rotatably connected, and a pressure plate 31 is slidably connected inside the pressure box 26. One end of the pressure rod 30 is rotatably connected to the side of the pressure plate 31. The pressure box 26 is provided with a conveying component for directional conveying of fluid. The conveying component includes a second serpentine tube 32 fixedly installed on the pressure box 26. The end of the second serpentine tube 32 away from the pressure box 26 is connected to a fixed frame 7. A third serpentine tube 33 connected to the fixed frame 7 is connected to an arc groove 17. The fixed frame 7 is connected to a sliding frame 8. A fourth serpentine tube 34 connected to the sliding frame 8 is connected to the fourth serpentine tube 34 and is connected to a connecting groove 25. The pressure box 26 is provided with a one-way inlet valve 35 for controlling the one-way input of gas into the pressure box 26. A one-way exhaust valve 36 for controlling the one-way delivery of gas from the pressure box 26 to the second serpentine tube 32 is fixedly connected inside the second serpentine tube 32.

[0023] Working principle: In use, first open the connecting latch 40 between the two semicircular rings 4, slide the arc plate 6 onto one of the semicircular rings 4, so that the two semicircular rings 4 open around the hinge position. Insert the wire 41 into the position between the two semicircular rings 4, and then close them. The connecting latch 40 closes and fixes the two semicircular rings 4 into a complete ring. At this time, the wire 41 is fitted inside the ring. This device is designed for use with large-diameter cables of 5cm or more. Thinner wires 41 cannot be positioned using this method, which may damage the wire 41. After closing, the arc plate 6 can continue to slide and adjust its position around the annular guide groove 5, while the sliding frame 8 can move along the fixed... The outer wall of the fixed frame 7 slides, which, together with the rotation of the rotating disk 9 and the rotating rod 11, makes the position of the machine body 1 more flexible, making it easier to align the bolt sleeve 3 with the bolt for positioning. After positioning, the drive motor 2 is started. The drive motor 2 drives the drive shaft 27 to rotate at high speed, while driving the first bevel gear 28 to rotate. The first bevel gear 28 drives the second bevel gear 29 to rotate, and the second bevel gear 29 drives the pressure rod 30 to rotate, so that the pressure plate 31 slides back and forth in the pressure box 26, drawing the outside gas into the pressure box 26 through the one-way air inlet valve 35, and then delivering it to the second serpentine tube 32 through the one-way exhaust valve 36, and then delivering it to the fixed frame 7 through the second serpentine tube 32.

[0024] As the air pressure inside the fixed frame 7 increases, the elastic cloth 19 will press against the guide groove 5, increasing friction and helping to limit the position of the arc plate 6 within the guide groove 5. Simultaneously, the first brake pad 22 is pushed against the inner wall of the sliding frame 8, helping to limit the position between the sliding frame 8 and the fixed frame 7. After the gas enters the sliding frame 8, it pushes the third brake pad 37 against the rotating disk 9, helping to limit the rotation of the rotating disk 9. The gas inside the sliding frame 8 is transported to the connecting groove 25 through the fourth serpentine tube 34, pushing the second brake pad 23 against the fixed buckle 10, helping to limit the rotation of the rotating rod 11. The gas inside the fixed frame 7 is also transported to the arc groove 17 through the third serpentine tube 33, and then to multiple sets of sliding grooves 13 through the arc groove 17 and the first serpentine tube 18, pushing the sliding block 1... 2. Slide the ball 15 to the side of the wire 41. The ball 15 gradually comes into contact with the outer wall of the wire 41. The first tension spring 16 is stretched. When the air pressure in the arc groove 17 is greater than the set value, the control valve 39 will discharge the excess gas to avoid damaging the wire 41. At this time, the entire body 1 is completely placed on the wire 41 through the rod-shaped structure composed of the rotating rod 11, sliding frame 8, fixed frame 7, and semi-circular ring 4. Each connection point is limited to a certain extent to prevent continued large shaking from affecting the stability of bolt tightening. This device can automatically adapt to the size of the wire 41 and the position of the body 1, and automatically assist in limiting each connection point when the drive motor 2 is running, reducing the shaking generated during bolt tightening. At the same time, this device can also act as a safety rope to prevent the body 1 from slipping out of your hand and falling during use, thus improving safety during use.

[0025] It is worth noting that the main structures in this design, such as the semicircular ring 4, sliding block 12, fixed frame 7, sliding frame 8, and rotating rod 11, are all made of insulating and lightweight materials. This facilitates weight reduction while preventing current transmission. The elastic element 38 can be replaced by any existing elastic structure, such as a spring. A speed reduction structure can be installed between the drive shaft 27 and the bolt sleeve 3, so that while the drive shaft 27 drives the first bevel gear 28 to rotate at high speed, the bolt sleeve 3 rotates relatively slowly. This ensures that the air box performs multiple reciprocating inflation operations rapidly while the bolt is being tightened, thereby improving efficiency. After the speed of the limit support is completed, the gas in the arc groove 17 and the fixed frame 7 can be discharged by opening the control valve 39. The first tension spring 16, the second tension spring 21 and the third tension spring 24 are pulled back to their original positions. At the same time, the first brake pad 22, the second brake pad 23 and the third brake pad 37 are released from the braking state, and the equipment returns to the initial state. The semi-circular ring 4 can continue to slide along the wire 41, and the rotating disk 9 and the rotating rod 11 can continue to rotate freely. The setting of the ball bearing 15 can fully reduce the friction between the semi-circular ring 4 and the outer wall of the wire 41 when it rotates radially and slides axially.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-adjusting centering and tightening device for bolts on overhead transmission lines, characterized in that, include: The machine body (1) is provided with a drive motor (2) and a bolt sleeve (3); Also includes: The support mechanism includes two sets of semicircular rings (4). The edges of the two sets of semicircular rings (4) are hinged to each other and can be closed to form a complete ring. The outer wall of the semicircular ring (4) is provided with a guide groove (5). An arc plate (6) is slidably connected in the guide groove (5). The side of the arc plate (6) is provided with a support member for supporting and adjusting the body (1). The semicircular ring (4) is provided with a clamping member for controlling the clamping state of the outer wall of the wire. The support mechanism can connect the body (1) to the wire for auxiliary positioning through the support member and the clamping member to avoid the problem of the body (1) falling during operation. When the drive motor (2) is running, it will also link the support member and the clamping member for auxiliary positioning, so that the body (1) can be rigidly supported on the outside of the wire. The wire provides auxiliary support for the body (1), reducing the shaking of the body (1) during tightening and improving the stability of the bolt centering and tightening process.

2. The adaptive centering and tightening device for bolts of overhead transmission lines according to claim 1, characterized in that: The support includes a fixed frame (7) fixedly installed on the side of the arc plate (6), a sliding frame (8) slidably sleeved on the outer wall of the fixed frame (7), a rotating disk (9) rotatably connected to the side of the sliding frame (8) away from the fixed frame (7), a fixing buckle (10) fixedly connected to the side of the rotating disk (9) and the body (1), a rotating rod (11) rotatably connected between the two sets of fixing buckles (10), and a limiting member for assisting in limiting each connection position when the drive motor (2) is running.

3. The adaptive centering and tightening device for bolts of overhead transmission lines according to claim 2, characterized in that: The clamping component includes multiple sets of sliding blocks (12) evenly installed on the semicircular ring (4). Multiple sets of sliding grooves (13) are evenly opened inside the semicircular ring (4). The sliding blocks (12) are slidably connected to the inner wall of the sliding grooves (13). A rolling cavity (14) is opened on the sliding block (12). A ball bearing (15) is rolled and connected inside the rolling cavity (14). A first tension spring (16) is fixedly connected to the sliding block (12) inside the sliding groove (13). An arc groove (17) for connecting the multiple sets of sliding grooves (13) is opened on the semicircular ring (4). A first serpentine tube (18) is fixedly connected between two semicircular rings (4). The two ends of the first serpentine tube (18) are respectively connected to the arc grooves (17) on the two sets of semicircular rings (4).

4. The adaptive centering and tightening device for bolts of overhead transmission lines according to claim 3, characterized in that: The limiting component includes an elastic cloth (19) fixedly installed on the arc plate (6). An elastic pull rope (20) fixedly connected to the side of the elastic cloth (19) and the arc plate (6) is fixedly connected. The side of the elastic cloth (19) away from the elastic pull rope (20) can slide against the inner wall of the guide groove (5). A second tension spring (21) is fixedly connected inside the fixed frame (7). A first brake pad (22) is fixedly connected to one end of the second tension spring (21). The first brake pad (22) is slidably connected to the inner wall of the fixed frame (7). The side of the first brake pad (22) away from the second tension spring (21) can abut against the inner wall of the sliding frame (8). A positioning component for limiting the rotation rod (11) is provided for the fixed buckle (10).

5. The adaptive centering and tightening device for bolts of overhead transmission lines according to claim 4, characterized in that: The positioning component includes multiple sets of second brake pads (23) installed on the rotating rod (11). The surface of the second brake pad (23) can fit against the outer wall of the fixing buckle (10). A third tension spring (24) is fixedly connected to the side of the second brake pad (23) away from the fixing buckle (10). A connecting groove (25) is provided in the rotating rod (11). The second brake pad (23) slides against the inner wall of the connecting groove (25). The machine body (1) is provided with a pressurizing component for inflating and pressurizing the connecting groove (25) and the fixing frame (7) in conjunction with the operation of the drive motor (2).

6. The adaptive centering and tightening device for bolts of overhead transmission lines according to claim 5, characterized in that: The pressurizing component includes a pressurizing box (26) fixedly installed inside the body (1), a drive shaft (27) is provided at the output end of the drive motor (2), the bolt sleeve (3) is installed on the drive shaft (27), a first bevel gear (28) is coaxially fixedly connected to the drive shaft (27), a second bevel gear (29) that meshes with the first bevel gear (28) is rotatably connected inside the body (1), a pressurizing rod (30) is rotatably connected to the side of the second bevel gear (29) at a non-center position, a pressurizing plate (31) is slidably connected inside the pressurizing box (26), one end of the pressurizing rod (30) is rotatably connected to the side of the pressurizing plate (31), and a conveying component for directional conveying of fluid is provided on the pressurizing box (26).

7. The adaptive centering and tightening device for bolts of overhead transmission lines according to claim 6, characterized in that: The conveying component includes a second serpentine tube (32) fixedly installed on the pressurizing box (26). The end of the second serpentine tube (32) away from the pressurizing box (26) is connected to the fixed frame (7). A third serpentine tube (33) connected to the arc groove (17) is connected to the fixed frame (7). The fixed frame (7) is connected to the sliding frame (8). A fourth serpentine tube (34) is connected to the sliding frame (8). The fourth serpentine tube (34) is connected to the connecting groove (25).

8. The adaptive centering and tightening device for bolts of overhead transmission lines according to claim 7, characterized in that: The pressurizing box (26) is provided with a one-way inlet valve (35) for controlling the one-way input of gas into the pressurizing box (26), and a one-way exhaust valve (36) for controlling the one-way delivery of gas from the pressurizing box (26) to the second serpentine tube (32) is fixedly connected inside the second serpentine tube (32).

9. The adaptive centering and tightening device for bolts of overhead transmission lines according to claim 2, characterized in that: A third brake pad (37) is slidably connected inside the sliding frame (8), and an elastic element (38) that is fixedly connected to the inner wall of the sliding frame (8) is fixedly connected to the side of the third brake pad (37) near the rotating disk (9).

10. The adaptive centering and tightening device for bolts of overhead transmission lines according to claim 3, characterized in that: A control valve (39) for controlling the gas intensity in the arc groove (17) is fixedly connected to the semi-circular ring (4). The control valve (39) can automatically open and exhaust gas when the gas pressure in the arc groove (17) is greater than the set value, and close again after the gas pressure in the arc groove (17) drops to the set value. A connecting latch (40) is provided between the two sets of semi-circular rings (4).

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