A retractable support bridge device for power transmission lines crossing complex terrain

Abstract

The present invention relates to the field of power transmission line engineering technology, and in particular to a retractable support bridge device for power transmission lines crossing complex terrain, comprising a base, which serves as a support carrier for the device; a support column, a support column fixedly connected to the middle portion of the base, the support column being a hollow pillar with symmetrical sliding openings on the left and right side walls; a bridging assembly, the bridging assembly including a threaded column, etc.; and a threaded column rotatably mounted inside the support column. The present invention uses a torque wrench to drive the threaded column to rotate, and then uses the threaded column to drive the threaded sleeve to achieve the lifting and displacement of the bridging assembly. When moving upward, the rack engages with the gear II, and the driving assembly drives the clamping assembly to move, thereby enabling the clamping blocks I and II to be tightened after clamping the power transmission line, thereby preventing the power transmission line from sagging after being bridged and lifted, and enabling the power transmission line to be conveniently bridged and effectively supported on the device.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission line engineering, and in particular to a telescopic supporting bridge device for power transmission lines crossing complex terrain. Background Art

[0002] Transmission lines are built by using transformers to boost the voltage of the electricity generated by generators, and then connecting them to the transmission lines through control equipment such as circuit breakers. The structural forms of transmission lines are divided into overhead transmission lines and cable lines. Traditional transmission line construction often relies on fixed towers and straight paths. However, in terrain conditions such as mountains, rivers, and deep valleys, directly building fixed structures is costly and has a greater impact on the environment. When disconnected transmission lines in complex terrain need to be connected, traditional manual direct maintenance methods often face greater maintenance challenges and costs when faced with complex terrain.

[0003] After searching, the patent with authorization publication number CN114156877A discloses a wire bridging device for electrically connecting the power supply wire after the power supply wire is broken. One end of the power supply wire is connected to the electrical equipment, and the other end is connected to the power supply equipment. After the power supply wire is broken, a first end and a second end are formed. The wire bridging device is electrically connected between the first end and the second end. The wire bridging device includes: two insulating clips, the two insulating clips are connected by a connecting wire, the length of the connecting wire is adjustable, and the two insulating clips are used to electrically connect to the first end and the second end respectively.

[0004] The above-mentioned wire bridging device fixes and bridges the disconnected wires by clamping the two ends of the disconnected wires with two insulating clips to achieve the purpose of rapid power supply. However, this device lacks an independent support structure and needs to rely on guide fixation at both ends, resulting in its own weight acting directly on the wires, forming a linear load-bearing state. This fixing method may cause the connection between the device and the wires to loosen or shift in position due to the influence of gravity, environmental factors and wire vibration over long-term use, posing serious safety risks, including circuit failure and power supply interruption. Therefore, to address the above problems, a retractable support bridging device for power transmission lines crossing complex terrain is designed. Summary of the Invention

[0005] In order to overcome the disadvantage of existing bridging devices that lack independent supporting structures when bridging electric wires, which will increase safety risks after installation, a retractable supporting bridging device for power transmission lines crossing complex terrain is provided.

[0006] The technical solution is: a retractable support bridge device for power transmission lines crossing complex terrain, including a base, which is a support carrier of the device; a support column, a support column is fixedly connected to the middle part of the base, and the support column is a hollow pillar with symmetrical sliding openings on the left and right side walls; a bridging component, which includes a threaded column, a threaded sleeve, a mounting frame and a support plate, a threaded column is rotatably installed inside the support column, a threaded sleeve is threadedly installed on the threaded column, and mounting frames are fixedly connected to the left and right sides of the threaded sleeve, and the two mounting frames are symmetrically passed through the sliding openings of the side walls of the support column, and the ends of the two mounting frames are fixedly connected to support plates, and a wire connecting the power transmission line is provided between the two support plates, and the two support plates support When supporting two transmission lines, they can be connected through the conductors; a torque wrench, a torque wrench is provided at the bottom of the threaded column, and the handle of the torque wrench passes through the outer side of the support column, and the torque wrench is convenient for rotating the threaded column; a clamping assembly, the clamping assembly includes a clamping block I, a clamping block II, a fastening bolt and a sliding plate, and the front and rear parts of the bottom side of each support plate are symmetrically slidably installed with a clamping block I, and each clamping block II is slidably installed on the clamping block I through a fastening bolt, and a sliding plate is fixed between the two clamping blocks I on the same support plate, and the sliding plate is slidably arranged on the bottom side of the support plate; a driving assembly, a driving assembly is provided on the mounting frame, and the driving assembly can drive the clamping assembly to clamp the transmission line for movement and tightening.

[0007] Furthermore, a threaded seat is circumferentially provided on the edge of the base, and a plurality of threaded seats are provided and circumferentially fixed to the edge side wall of the base. The threaded seat as a whole is an H-shaped block with screw holes. Multiple threaded seats are installed together on the ground to improve the stability of the base.

[0008] Furthermore, the clamping assembly also includes a support block, which is symmetrically arranged on the opposite side of each support plate. The support block is an arc block with an open top, and is used to adapt to clamp block I and clamp block II to provide protection when clamping the power transmission line.

[0009] Furthermore, a circular clamping opening is provided in the middle of the butt joint surfaces of the clamping block I and the clamping block II, and the support block, the clamping block I and the clamping block II are all made of insulating material.

[0010] Furthermore, the drive assembly includes a mounting block, a double-headed worm, gear I, a double-headed screw, gear II and a rack. The bottom of each mounting frame is fixedly connected to a mounting block, and a double-headed worm is passed through and rotatably installed on each mounting block, and the spiral directions of the two ends of the double-headed worm are opposite. Gear I is installed on the shaft of the two double-headed screws, and a double-headed screw is symmetrically installed and rotatably installed between the two support plates. The two threads of the double-headed screw are respectively threadedly connected to the corresponding sliding plates. Two gears II are installed in the middle of the two double-headed screws, and each gear II is respectively engaged with the worm at the corresponding position on the double-headed worm. A plurality of racks are symmetrically installed on the upper side wall of the support column, and each rack is respectively adapted to and engaged with the corresponding gear I.

[0011] Furthermore, a reinforcement component is also provided on the support plate, and the reinforcement component includes a fixed block I, a guide rod, a fixed block II and an elastic member. A fixed block I is symmetrically fixedly installed on each support plate, and a fixed block II is slidably installed on each fixed block I through a guide rod. The fixed block I and the fixed block II cooperate with each other to clamp the power transmission line. An elastic member is provided between each group of the fixed block I and the fixed block II. The fixed block I and the fixed block II cooperate to further reinforce the power transmission line.

[0012] Furthermore, the fixing block I and the fixing block II are initially in an open state, and arc clamping grooves are provided on the clamping surfaces of the fixing block I and the fixing block II, and rubber buffer pads are provided on the surfaces of the arc clamping grooves.

[0013] Furthermore, it also includes a linkage component, which includes a lower pressure plate, a rotating rod and a connecting block. The lower pressure plate is rotatably installed on each support plate through the rotating rod. The lower pressure plates all pass through the corresponding support plates. A connecting block is fixed between the two fixed blocks II on the same support plate. The lower pressure plate is in contact with the connecting block, and the sliding plate can cooperate with and press the lower end of the lower pressure plate.

[0014] Furthermore, a labor-saving component is included, which includes a mounting plate, a rotating shaft, a rotating rod and a ring. The mounting plate is fixedly connected to one side of the base, and the rotating rod is rotatably installed on the mounting plate through the rotating shaft. The handle end of the torque wrench is provided with the ring, and the end of the rotating rod is rotatably connected to the ring. The rotating rod can facilitate the swinging of the torque wrench and the rotation of the threaded column.

[0015] Beneficial effects of the present invention: 1. The present invention uses a torque wrench to drive the threaded column to rotate, and then uses the threaded column to drive the threaded sleeve to realize the lifting and lowering displacement of the bridge assembly. When moving up, the rack engages the gear II, and the driving assembly drives the clamping assembly to move, so that the clamping blocks I and II can be tightened after clamping the transmission line, avoiding the transmission line from sagging after bridging and lifting, and realizing that the transmission line can be conveniently bridged and effectively supported on this device.

[0016] 2. The present invention can link and squeeze the rotating rod through the sliding plate, and then link the connecting block through the rotating rod, so that after the support plate is lifted, the fixed block I and the fixed block II can further reinforce the transmission line placed on the support plate, thereby improving the stability and safety of the transmission line after being lifted by the device.

[0017] 3. The present invention can also provide a labor-saving component on the torque wrench, and lengthen the operating arm through a rotating rod and extend it to the outside. Construction workers can remotely operate the rotating rod to drive the torque wrench to swing, thereby reducing the pressure on construction workers to lower or lift the transmission line. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of components such as the support column and the bridge assembly of the present invention.

[0020] Figure 3 This is a diagram showing the connection relationship between the bridging component and the clamping component of the present invention.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the specific components of the bridging assembly and the clamping assembly of the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of some components of the drive assembly of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the clamping assembly and the driving assembly of the present invention.

[0024] Figure 7 This is a diagram showing the connection relationship between the bridging component and the reinforcement component of the present invention.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the specific components of the reinforcement assembly of the present invention.

[0026] Figure 9 It is a schematic diagram of the three-dimensional structure of the reinforcement component and the linkage component of the present invention.

[0027] Figure 10 It is a schematic diagram of the three-dimensional structure of the torque wrench and the labor-saving component of the present invention.

[0028] Figure numbers: 1_base, 101_threaded seat, 2_support column, 3_bridge assembly, 301_threaded column, 302_threaded sleeve, 303_mounting frame, 304_support plate, 4_torque wrench, 5_clamping assembly, 501_clamping block I, 502_clamping block II, 503_fastening bolt, 504_sliding plate, 505_support block, 6_drive assembly, 601_mounting block, 602_double-headed worm , 603_gear Ⅰ, 604_double-headed screw, 605_gear Ⅱ, 606_rack, 7_reinforcement component, 701_fixed block Ⅰ, 702_guide rod, 703_fixed block Ⅱ, 704_elastic part, 8_linkage component, 801_lower pressure plate, 802_rotating rod, 803_connecting block, 9_labor-saving component, 901_mounting plate, 902_rotating shaft, 903_rotating rod, 904_ring. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0030] Example 1: A retractable support bridge device for a power transmission line crossing a complex terrain, such as Figure 1-Figure 4As shown, it includes a base 1, which is the supporting carrier of the present device; a support column 2, a support column 2 is fixedly connected to the middle part of the base 1, and the support column 2 is a hollow pillar with symmetrical sliding openings on the left and right side walls; a bridging component 3, which includes a threaded column 301, a threaded sleeve 302, a mounting bracket 303 and a support plate 304, a threaded column 301 is rotatably installed inside the support column 2, a threaded sleeve 302 is threadedly installed on the threaded column 301, and mounting brackets 303 are fixedly connected to the left and right sides of the threaded sleeve 302, two mounting brackets 303 are symmetrically passed through the sliding openings of the side walls of the support column 2, and the ends of the two mounting brackets 303 are fixedly connected to support plates 304, and a wire for connecting the power transmission lines is provided between the two support plates 304, and when the two support plates 304 support two power transmission lines, they can be connected through the wire. ; Torque wrench 4, a torque wrench 4 is provided at the bottom of the threaded column 301, the handle of the torque wrench 4 passes through the outer side of the support column 2, and the torque wrench 4 is convenient for rotating the threaded column 301; clamping assembly 5, the clamping assembly 5 includes a clamping block I 501, a clamping block II 502, a fastening bolt 503 and a sliding plate 504, the front and rear parts of the bottom side of each support plate 304 are symmetrically slidably installed with clamping blocks I 501, and each clamping block II 502 is slidably installed on the clamping I through the fastening bolt 503, and a sliding plate 504 is fixed between the two clamping blocks I 501 on the same support plate 304, and the sliding plate 504 is slidably set on the bottom side of the support plate 304; driving assembly 6, a driving assembly 6 is provided on the mounting frame 303, and the driving assembly 6 can drive the clamping assembly 5 to clamp the power transmission line for moving and tightening.

[0031] like Figure 2 As shown, a threaded seat 101 is circumferentially provided on the edge of the base 1. The threaded seat 101 is provided in plurality and is circumferentially fixed to the edge side wall of the base 1. The threaded seat 101 is an H-shaped block with screw holes as a whole. The plurality of threaded seats 101 are installed together on the ground to improve the stability of the base 1.

[0032] like Figure 1 、 Figure 3 and Figure 4 As shown, the clamping assembly 5 also includes a support block 505, and a support block 505 is symmetrically arranged on the opposite side of each support plate 304. The support block 505 is an arc block with an open top. The support block 505 is used to adapt to the clamp block I 501 and the clamp block II 502 to provide protection when clamping the power transmission line; the middle part of the mating surface of the clamp block I 501 and the clamp block II 502 is provided with a circular clamping opening, and the material of the support block 505, the clamp block I 501 and the clamp block II 502 are all made of insulating material.

[0033] like Figure 1 、 Figure 5 and Figure 6 As shown, the drive assembly 6 includes a mounting block 601, a double-headed worm 602, a gear I 603, a double-headed screw 604, a gear II 605 and a rack 606. The bottom of each mounting frame 303 is fixed with a mounting block 601. A double-headed worm 602 is passed through and rotatably mounted on each mounting block 601, and the spiral directions of the two ends of the double-headed worm 602 are opposite. Gear I 603 is installed on the shaft of the two double-headed screws 604. The two support plates 304 are fixed with a mounting block 601. A double-headed screw rod 604 is symmetrically installed in rotation between them, and the two threads of the double-headed screw rod 604 are respectively threadedly connected to the corresponding sliding plate 504. Two gears II 605 are installed in the middle of the two double-headed screw rods 604, and each gear II 605 is respectively engaged with the corresponding worm on the double-headed worm 602. A plurality of racks 606 are symmetrically installed on the upper part of the side wall of the support column 2, and each rack 606 is respectively adapted to and engaged with the corresponding gear I 603.

[0034] When it is necessary to connect two transmission lines, this device can be used. The construction personnel will first use the torque wrench 4 to twist the threaded column 301 to rotate it forward. The forward-rotating threaded column 301 will drive the threaded sleeve 302 to move downward through the thread. The downward-moving threaded sleeve 302 will synchronously drive the support plate 304 to slide down to a position close to the base 1 through the mounting brackets 303 on both sides. At this time, it is convenient for the construction personnel to carry out the bridging operation of the transmission lines. The construction personnel then connect the two transmission lines that need to be bridged. The wires are placed on the two support plates 304 respectively, and the transmission wires at the two places are passed around the support block 505 and then passed between the corresponding clamping block I 501 and clamping block II 502. At this time, the clamping block I 501 and clamping block II 502 are adjusted to close by tightening the fastening bolts 503, so that each set of clamping blocks I 501 and clamping blocks II 502 clamp the inserted transmission wires. The transmission wires clamped at the left and right places can be connected after stripping through the wires on the support plate 304. When the transmission wires at the two places are bridged, switch first. The torque direction of the torque wrench 4 is determined by twisting the threaded column 301 with the torque wrench 4 to rotate in the opposite direction. The reversed threaded column 301 will drive the threaded sleeve 302 to move upward through the thread. The upward threaded sleeve 302 will synchronously drive the support plate 304 to slide upward through the mounting brackets 303 on both sides. At this time, the driving assembly 6 will also slide upward with the mounting bracket 303 until the gear I 603 contacts and engages with the corresponding rack 606. The gear I 603 will synchronously drive the two double-headed worm gears 60 2 rotates, the rotating double-headed worm 602 drives the two double-headed screws 604 to rotate through the meshing gear II 605, and the rotating double-headed screws 604 then synchronously drive the two sliding plates 504 to slide away from each other through the thread, and make the entire clamping block I 501 and clamping block II 502 move with the sliding plate 504. At this time, the transmission line clamped between the clamping block I 501 and the clamping block II 502 will be stretched, avoiding the problem that the transmission line after the bridge is lifted due to excessive sagging, which may easily cause an accident.

[0035] Example 2: Based on Example 1, Figure 1 、 Figure 7 and Figure 8As shown, a reinforcement component 7 is also provided on the support plate 304, and the reinforcement component 7 includes a fixed block I 701, a guide rod 702, a fixed block II 703 and an elastic member 704. A fixed block I 701 is symmetrically fixedly installed on each support plate 304, and a fixed block II 703 is slidably installed on each fixed block I 701 through a guide rod 702. The fixed blocks I 701 and the fixed blocks II 703 cooperate with each other to clamp the power transmission line, and an elastic member 704 is provided between each group of the fixed blocks I 701 and the fixed blocks II 703. The cooperation between the fixed blocks I 701 and the fixed blocks II 703 can further reinforce the power transmission line; the fixed blocks I 701 and the fixed blocks II 703 are initially in an open state, and the clamping surfaces of the fixed blocks I 701 and the fixed blocks II 703 are provided with arc clamping grooves, and the surfaces of the arc clamping grooves are provided with rubber buffer pads.

[0036] like Figure 1 and Figure 9 As shown, it also includes a linkage component 8, which includes a lower pressure plate 801, a rotating rod 802 and a connecting block 803. The lower pressure plate 801 is rotatably installed on each support plate 304 through the rotating rod 802. The lower pressure plates 801 all pass through the corresponding support plates 304. A connecting block 803 is fixed between the two fixed blocks II703 on the same support plate 304. The lower pressure plate 801 is in contact with the connecting block 803, and the sliding plate 504 can cooperate with and press the lower end of the lower pressure plate 801.

[0037] like Figure 1 and Figure 10 As shown, a labor-saving component 9 is also included, and the labor-saving component 9 includes a mounting plate 901, a rotating shaft 902, a rotating rod 903 and a collar 904. The mounting plate 901 is fixedly connected to one side of the base 1, and the rotating rod 903 is rotatably installed on the mounting plate 901 through the rotating shaft 902. The handle end of the torque wrench 4 is provided with the collar 904, and the end of the rotating rod 903 is rotatably connected to the collar 904. The rotating rod 903 can facilitate the swinging of the torque wrench 4 and the rotation of the threaded column 301.

[0038] When the torque wrench 4 is needed to drive the threaded column 301 to rotate, the construction worker can hold the rotating rod 903 and rotate it back and forth. The rotating rotating rod 903 will drive the ring 904 to move with the rotating shaft 902 as the center. At this time, the moving ring 904 will synchronously drive the torque wrench 4 to swing back and forth, thereby reducing the resistance of the construction worker to swing the torque wrench 4. As the support plate 304 drives the transmission line to continue to rise, the two sliding plates 504 will slide away from each other. At this time, the two sliding plates Plate 504 will press on the lower end of the lower pressure plate 801, and the pressed lower pressure plate 801 will rotate with the rotating rod 802 as the axis, and the upper end of the rotating lower pressure plate 801 will be squeezed downward on the corresponding connecting block 803, so that the connecting block 803 drives the fixed blocks II 703 at both ends to slide downward under the guidance of the guide rod 702. At this time, the transmission line on the support plate 304 will be further reinforced by the fixed blocks I 701 and II 703, so that the transmission line can be stably raised to a certain height.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A telescopic supporting bridge device for a power transmission line crossing a complex terrain, comprising a base (1); a supporting column (2), wherein the support column (2) is fixedly connected to the middle portion of the base (1), and the supporting column (2) is a hollow pillar with symmetrical sliding openings on the left and right side walls; characterized in that: The invention also includes a bridging assembly (3), wherein the bridging assembly (3) includes a threaded column (301), a threaded sleeve (302), a mounting frame (303) and a support plate (304), wherein the threaded column (301) is rotatably mounted inside the support column (2), a threaded sleeve (302) is threadedly mounted on the threaded column (301), and mounting frames (303) are fixedly connected to the left and right sides of the threaded sleeve (302), and the two mounting frames (303) are symmetrically inserted into the sliding opening of the side wall of the support column (2), and the ends of the two mounting frames (303) are fixedly connected to the support plate (304), and a conductor connected to the power transmission line is provided between the two support plates (304); a torque wrench (4), wherein the bottom of the threaded column (301) is provided with a torque wrench (4), and the handle of the torque wrench (4) is provided. Penetrating the outer side of the support column (2); a clamping assembly (5), the clamping assembly (5) comprising a clamping block I (501), a clamping block II (502), a fastening bolt (503) and a sliding plate (504), the front and rear parts of the bottom side of each support plate (304) being symmetrically slidably mounted with a clamping block I (501), each clamping block II (502) being slidably mounted on the clamping block I via the fastening bolt (503), a sliding plate (504) being fixedly connected between two clamping blocks I (501) on the same support plate (304), the sliding plate (504) being slidably mounted on the bottom side of the support plate (304); a driving assembly (6), the mounting frame (303) being provided with a driving assembly (6), the driving assembly (6) being capable of driving the clamping assembly (5) to clamp the transmission line for movement and tensioning; The driving assembly (6) includes a mounting block (601), a double-headed worm (602), a gear I (603), a double-headed screw (604), a gear II (605) and a rack (606). The bottom of each mounting frame (303) is fixed with a mounting block (601). A double-headed worm (602) is passed through and rotatably mounted on each mounting block (601). The spiral directions of the two ends of the double-headed worm (602) are opposite. Gear I (603) is mounted on the shafts of the two double-headed screws (604). The two support plates (303) are fixed with a mounting block (601). 04) are symmetrically mounted with a double-headed screw (604), the two threads of the double-headed screw (604) are respectively threadedly connected to the corresponding sliding plate (504), and two gears II (605) are mounted in the middle of the two double-headed screws (604), and each gear II (605) is respectively engaged with the worm at the corresponding position on the double-headed worm (602), and a plurality of racks (606) are symmetrically mounted on the upper part of the side wall of the support column (2), and each rack (606) is respectively adapted to and engaged with the corresponding gear I (603).

2. A retractable support bridge device for a power transmission line crossing a complex terrain according to claim 1, characterized in that: The edge of the base (1) is circumferentially provided with a threaded seat (101), and the threaded seat (101) is provided with a plurality of threads and is circumferentially fixed to the edge side wall of the base (1), and the threaded seat (101) is an H-shaped block with a screw hole as a whole.

3. A retractable support bridge device for a power transmission line crossing a complex terrain according to claim 2, characterized in that: The clamping assembly (5) further comprises a supporting block (505), and a supporting block (505) is symmetrically provided on one side of each supporting plate (304) facing each other, and the supporting block (505) is an arc block with an open top.

4. A retractable support bridge device for a power transmission line crossing a complex terrain according to claim 3, characterized in that: A circular clamping opening is provided in the middle of the butt joint surfaces of the clamping block I (501) and the clamping block II (502), and the support block (505), the clamping block I (501) and the clamping block II (502) are all made of insulating material.

5. A retractable support bridge device for a power transmission line crossing a complex terrain according to claim 4, characterized in that: A reinforcement assembly (7) is also provided on the support plate (304), and the reinforcement assembly (7) includes a fixed block I (701), a guide rod (702), a fixed block II (703) and an elastic member (704). A fixed block I (701) is symmetrically fixedly installed on each support plate (304), and a fixed block II (703) is slidably installed on each fixed block I (701) through the guide rod (702). The fixed block I (701) and the fixed block II (703) cooperate with each other, and an elastic member (704) is provided between each group of the fixed block I (701) and the fixed block II (703).

6. A retractable support bridge device for power transmission lines crossing complex terrain according to claim 5, characterized in that: The clamping surfaces of the fixing block I (701) and the fixing block II (703) are both provided with arc clamping grooves, and the surfaces of the arc clamping grooves are both provided with rubber buffer pads.

7. A retractable support bridge device for a power transmission line crossing a complex terrain according to claim 6, characterized in that: The invention also includes a linkage assembly (8), wherein the linkage assembly (8) includes a lower pressure plate (801), a rotating rod (802) and a connecting block (803). The lower pressure plate (801) is rotatably installed on each support plate (304) through the rotating rod (802). The lower pressure plate (801) passes through the corresponding support plate (304). A connecting block (803) is fixed between the two fixed blocks II (703) on the same support plate (304). The lower pressure plate (801) is in contact with the connecting block (803).

8. A retractable support bridge device for power transmission lines crossing complex terrain according to claim 7, characterized in that: The invention also includes a labor-saving component (9), which includes a mounting plate (901), a rotating shaft (902), a rotating rod (903) and a collar (904). One side of the base (1) is fixedly connected to the mounting plate (901), and the rotating rod (903) is rotatably mounted on the mounting plate (901) via the rotating shaft (902). The collar (904) is provided at the handle end of the torque wrench (4), and the end of the rotating rod (903) is rotatably connected to the collar (904).

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