Isolation device for power overhead line construction

Abstract

According to the isolation device for electric power overhead line construction, the supporting frame, the bearing mechanism, the mounting mechanism and the isolation assembly are arranged in a matched mode, the telescopic frame is in sliding fit with the supporting frame, the height of the device can be flexibly adjusted, and the isolation device can meet the construction requirements of different overhead lines; the device is suitable for erecting supporting structures of different widths, combined with driving of the first electric telescopic rods, high-altitude operation is reduced, safety is improved, the influence on construction efficiency is reduced, and the problems that time and labor are consumed when a temporary protective net is manually erected or a simple support is used for protection, potential safety hazards exist, the installation efficiency is low, and the construction cost is low are solved. The problems that the protection range is limited and cables or parts cannot be effectively prevented from falling off in the construction process due to the fact that the laid supporting structure is difficult to flexibly adjust are solved, the phenomenon that an existing isolation device is low in practicability and safety performance is avoided, and the construction efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of power system technology, and specifically relates to an isolation device for the construction of overhead power lines. Background Technology

[0002] During the construction of overhead power lines, it is often necessary to erect or maintain new lines near existing power facilities (such as cable installations and power poles). Because of the potential for cable dragging and falling parts during construction, failure to effectively isolate existing facilities could lead to short circuits, equipment damage, or even safety accidents.

[0003] Existing isolation methods typically involve manually erecting temporary protective nets or using simple supports. However, these methods require a lot of manual work at height, such as manually laying protective nets and fixing supports. This is not only time-consuming and labor-intensive, but also poses safety hazards, has low installation efficiency, and the support structure is difficult to adjust flexibly, resulting in a limited protection range. This makes it impossible to effectively prevent cables from drooping or parts from falling during construction. Furthermore, the practicality and safety performance of existing isolation devices are low, which also affects construction efficiency.

[0004] The invention disclosed in CN109787141A is an isolation device for the construction of overhead power lines. Its key technical features include a first isolation mechanism, a second isolation mechanism, and a low-voltage flexible wire. The first isolation mechanism includes a first main beam, a first clamp connected to the first main beam, and a braking assembly mounted on the first main beam. The second isolation mechanism includes a second main beam, a second clamp connected to the second main beam, and a clamping member mounted on the second main beam. The first isolation mechanism is fixed to a first pole via the first clamp, and the second isolation mechanism is fixed to a second pole via the second clamp. One end of the low-voltage flexible wire is fixed to the clamping member, and the other end is connected to the braking assembly. This allows the new line to be suspended on the low-voltage flexible wire during installation, thus isolating and supporting it without affecting other lines (i.e., preventing breakage of other lines) and significantly reducing construction losses. It also prevents wear and tear on the newly installed lines. However, its primary focus is on line installation and it does not allow for flexible adjustment of the device height.

[0005] Therefore, it is still necessary to improve the isolation devices used in the construction of overhead power lines to avoid the low practicality and safety performance of the existing isolation devices. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by providing an isolation device for the construction of overhead power lines, thus solving the problem of time-consuming and labor-intensive methods of manually constructing temporary protective nets or using simple supports for protection.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is as follows: An isolation device for construction of overhead power lines includes a support frame, a bearing mechanism installed on the top of the support frame, an installation mechanism and a connecting mechanism installed at one end of the bearing mechanism, and an isolation component wound around the middle of the installation mechanism. A rotating disk and a beaded rope that engages with the installation mechanism are also provided on one side of the installation mechanism. The supporting mechanism includes a telescopic frame, a movable frame, a first electric telescopic rod, and a connecting plate for fixing adjacent telescopic frames. The telescopic frame slides vertically through the top of the support frame and adjusts its height by extending and retracting under the action of a control switch installed on the outer wall of the support frame. The movable frame slides horizontally through one end of the two opposing telescopic frames and moves horizontally under the action of the first electric telescopic rod fixed to one end of the connecting plate. The connecting mechanism includes a connecting block, a lifting assembly, multiple pressing net assemblies, a pressing down assembly, and corresponding limiting posts and inclined slots. The connecting block is fixed on one side of the mounting mechanism, the lifting assembly is installed between two connecting blocks, multiple pressing net assemblies are arranged opposite each other on both sides of the isolation assembly, and the pressing down assembly is installed at the end of a pressing net assembly. Multiple limiting posts are fixed at the end of a pressing net assembly, and multiple inclined slots are opened on the opposite sides of multiple mounting frames. The limiting posts are slidably inserted into the inner cavities of adjacent inclined slots for pressing the pressing net assembly vertically onto another pressing net assembly. The isolation assembly includes a mounting plate and an insulating mesh. The mounting plate is inserted through one end of the movable frame, and the insulating mesh is wound on a reel with one end fixed to the top of the mounting plate, providing full protection for the telescopic frame and the movable frame.

[0008] The installation mechanism includes a positioning plate, a mounting frame, and a reel. The positioning plate is fixed on two telescopic frames, and the reel is rotatably mounted on the mounting frames fixed at both ends of the positioning plate. The rotating disk is fixed to one end of the reel and rotates under the pull of the meshing beaded rope.

[0009] The lifting assembly includes a fixed rod, a second electrically operated telescopic rod, a movable rod, a lifting rod, and a pressure roller. The fixed rod is fixed between the two connecting blocks, and the second electric telescopic rod is fixedly inserted through the middle of the fixed rod; The movable pole is fixed to the top of the second electric telescopic pole; The lifting rod is slidably inserted into the middle of the connecting block, and multiple lifting rods are fixed to the ends of the movable rod; The pressure roller rotates between two adjacent lifting rods via a rotating pin.

[0010] The pressure mesh assembly includes a pressure plate, wear-resistant blocks, and an auxiliary structure. One end of the pressure plate is connected to the lower pressure assembly, and the other pressure plate is fixed between the two connecting blocks. Wear-resistant blocks are fixed on the outer wall of the pressure plate and arranged opposite to each other. The auxiliary structure is located on the top of the pressure plate.

[0011] The auxiliary structure includes an auxiliary groove on the pressure plate, a rotating rod that rotatably passes through the inner wall of the auxiliary groove, an auxiliary rod rotatably mounted on the rotating rod, a torsion spring, and an auxiliary roller. The bottom of the auxiliary rod is rotatably connected to the inner cavity of the auxiliary groove. The torsion spring is installed between the auxiliary rod and the auxiliary groove and sleeved on the outer wall of the rotating rod. The auxiliary roller rotates between two adjacent auxiliary rods via a rotating pin.

[0012] The pressing assembly includes a slot and a pressing rod rotatably disposed in the slot, a pressing block that is attached to the outer wall of the pressing rod, and an extension rod fixed to the end of a pressure plate. The extension rod is rotatably inserted into one end of an adjacent pressing rod through a bearing. The bottom of the pressing block has an elongated hole and a limiting rod fixed to the inner wall of the slot is inserted therein, and the top of the pressing block is fixedly connected to the end of the movable rod. An arc rod is fixed to the lower side wall of the pressure rod and slides through the outer wall of the slot. A compression spring is also sleeved on the arc rod and limited between the pressure rod and the side wall of the slot.

[0013] The second electric telescopic rod is controlled to extend and retract via a corresponding control switch.

[0014] The beneficial effects of this invention are: (1) The isolation device for the construction of overhead power lines is set up by a combination of support frame, bearing mechanism, installation mechanism and isolation components. The height of the device can be flexibly adjusted by sliding cooperation between the telescopic frame and the support frame to adapt to the construction needs of different overhead lines. The movable frame can slide horizontally and be erected above the existing facilities. It is suitable for erecting support structures of different widths. Combined with the first electric telescopic pole drive, it reduces high-altitude operations, improves safety, and reduces the impact on construction efficiency. It solves the problems of time-consuming and labor-intensive temporary protective nets or simple supports for protection, which also pose safety hazards, low installation efficiency, and difficulty in flexibly adjusting the laid support structure, resulting in limited protection range and inability to effectively prevent cables from drooping or parts from falling during construction. It avoids the phenomenon of low practicality and safety performance of existing isolation devices and improves construction efficiency.

[0015] (2) By setting up the installation mechanism and the connection mechanism, the extension and retraction of the movable frame can pull the insulating net on the roller through the control switch, which facilitates the mesh insulation protection above the movable frame, reduces the falling of parts and structures, and prevents the wire from falling on the movable frame, reducing the risk of objects falling to the ground. In addition, the connection mechanism facilitates the double snap-fit ​​fixation of the unwinding end of the insulating net, so that the insulating net can be tightened, reducing manual high-altitude operations and improving construction efficiency.

[0016] (3) The present invention, through the setting of the rotating disk and the beaded rope, makes it easy to roll up the insulation net after the construction is completed and the movable frame is retracted by pulling the beaded rope, further eliminating the need for manual high-altitude operations, and making it easy to reuse the insulation net, thus improving the practicality of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the side structure of the support frame of the present invention.

[0019] Figure 3 This is a schematic diagram of the overall structure of the support frame of the present invention.

[0020] Figure 4 This is a schematic diagram of the side structure of the mounting bracket of the present invention.

[0021] Figure 5 This is a top-view cross-sectional view of the mounting bracket of the present invention.

[0022] Figure 6 This is a schematic diagram of a partial top view of the pressure plate of the present invention.

[0023] Figure 7 This is a front cross-sectional view of the connecting block of the present invention.

[0024] Figure 8 This is a schematic diagram of the overall structure of a portion of the pressure plate of the present invention.

[0025] In the diagram: 1. Support frame; 2. Bearing mechanism; 21. Telescopic frame; 22. Connecting plate; 23. Movable frame; 24. First electric telescopic rod; 25. Flared ring; 3. Installation mechanism; 31. Positioning plate; 32. Mounting frame; 33. Roller; 4. Connecting mechanism; 41. Connecting block; 42. Lifting assembly; 421. Fixed rod; 422. Second electric telescopic rod; 423. Movable rod; 424. Lifting rod; 425. Pressure roller; 43. Pressing mesh assembly; 431. Pressure plate; 432. Wear-resistant block; 43 3. Auxiliary structure; 4331. Auxiliary groove; 4332. Rotating rod; 4333. Auxiliary rod; 4334. Torsion spring; 4335. Auxiliary roller; 44. Pressing assembly; 441. Slot; 442. Pin; 443. Pressing rod; 444. Extension rod; 445. Pressing block; 446. Limiting rod; 447. Compression spring; 448. Arc rod; 45. Limiting post; 46. Inclined groove; 5. Isolation assembly; 51. Mounting plate; 52. Insulating mesh; 6. Rotating disc; 7. Beaded rope; 8. Control switch. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0027] This invention provides an isolation device for the construction of overhead power lines, such as... Figures 1 to 8 As shown.

[0028] An isolation device for construction of overhead power lines includes multiple support frames 1, a bearing mechanism 2, an installation mechanism 3, a connecting mechanism 4, an isolation component 5, a rotating disk 6, and a beaded rope 7. The bearing mechanism 2 is installed on the top of the multiple support frames 1, the installation mechanism 3 is installed at one end of the bearing mechanism 2, the connecting mechanism 4 is located on one side of the installation mechanism 3, the isolation component 5 is wound around the middle of the installation mechanism 3 and is located on the upper surface of the bearing mechanism 2, the connecting mechanism 4 is used for positioning and locking the isolation component 5, the rotating disk 6 is fixed to one end of the installation mechanism 3, and the beaded rope 7 is engaged and locked to one end of the installation mechanism 3.

[0029] The supporting mechanism 2 includes a telescopic frame 21, a connecting plate 22, a movable frame 23, a first electric telescopic rod 24, and a flared ring 25. The telescopic frame 21 slides vertically through the top of the support frame 1. A control switch 8 is fixedly connected to the outer wall of one of the support frames 1. The telescopic frame 21 is fixed to the support frame 1 by bolts. The sliding insertion of the telescopic frame 21 and the support frame 1 makes it easy to adjust the height of the telescopic frame 21 so that it can be adapted to the construction requirements of overhead power lines at different heights. A connecting plate 22 is fixed between two of the telescopic frames 21. A movable frame 23 slides horizontally through one end of two of the telescopic frames 21, and the other end of the movable frame 23 slides through the other ends of the other two telescopic frames 21. The movable frame 23 allows for the connection of four telescopic frames 21 arranged at four corners, facilitating the installation of the four telescopic frames 21 on both sides of existing lines or other facilities. It also allows the movable frame 23 to be erected on top of existing lines or facilities, thus blocking the power lines being installed and preventing them from being dragged or drooping and affecting existing lines or facilities. In normal operation, the first electric telescopic rod 24 is fixed between the connecting plate 22 and the movable frame 23. The first electric telescopic rod 24 is electrically connected to an external power source through the control switch 8. Pressing the control switch 8 allows the first electric telescopic rod 24 to push the movable frame 23, avoiding high-altitude work for personnel and improving the safety of the isolation device. Multiple flared rings 25 are fixed to the other ends of two other telescopic frames 21. The flared rings 25 allow the movable frame 23 to extend into the inner cavity of the flared rings 25 and continue to extend into the other two telescopic frames 21, improving the stability of the connection between the movable frame 23 and the telescopic frame 21.

[0030] In addition, the installation mechanism 3 includes a positioning plate 31, a mounting frame 32, and a roller 33. The positioning plate 31 is inserted through one end of two telescopic frames 21. Multiple mounting frames 32 are fixed to the ends of the positioning plate 31. The connecting mechanism 4 is fixed between the multiple mounting frames 32. The end of the roller 33 is rotatably connected to the middle of the mounting frame 32 through a bearing. The rotating disk 6 is fixed to one end of the roller 33. The pull bead rope 7 is engaged and snapped into one end of the roller 33. The roller 33 has a groove structure that matches the structure of the pull bead rope 7, similar to a curtain pull bead, so that the roller 33 can be stably rotated by pulling the pull bead rope 7, reducing the risk of high-altitude operations for workers.

[0031] The isolation assembly 5 includes a mounting plate 51 and an insulating mesh 52. The mounting plate 51 is inserted through one end of the movable frame 23, and the insulating mesh 52 is wound around the reel 33. One end of the insulating mesh 52 is fixed to the top of the mounting plate 51, so that the insulating mesh 52 can provide safety protection for the top of the telescopic frame 21 and the top of the movable frame 23, reducing the impact of the line laying sagging or parts falling to the ground or existing facilities.

[0032] Furthermore, the connecting mechanism 4 includes a connecting block 41, a lifting component 42, multiple pressing net components 43, a pressing component 44, a limiting post 45, and an inclined groove 46. The connecting block 41 is fixed to one side of the mounting frame 32. The lifting component 42 is installed between two opposite connecting blocks 41. The multiple pressing net components 43 are arranged opposite each other on both sides of the isolation component 5. The pressing component 44 is installed at the end of one of the pressing net components 43. The multiple limiting posts 45 are fixed at the end of one of the pressing net components 43. The multiple inclined grooves 46 are opened on opposite sides of the multiple mounting frames 32, and the limiting posts 45 are slidably inserted into the inner cavities of adjacent inclined grooves 46, so that one pressing net component 43 can be pressed vertically against another pressing net component 43.

[0033] Specifically, the lifting assembly 42 includes a fixed rod 421, a second electric telescopic rod 422, a movable rod 423, a lifting rod 424, and a pressure roller 425. The fixed rod 421 is fixed between two connecting blocks 41. The second electric telescopic rod 422 is fixedly inserted through the middle of the fixed rod 421. The movable rod 423 is fixed to the top of the second electric telescopic rod 422. The second electric telescopic rod 422 is electrically connected to an external power source via a control switch 8. The lifting rod 424 is slidably inserted through the middle of the connecting blocks 41, and the pressure roller 425 is connected via the lifting rod 424. To improve the stability of the lifting and lowering of the movable rod 423, multiple lifting rods 424 are fixed to the ends of the movable rod 423. The pressure roller 425 rotates between two adjacent lifting rods 424 via a rotating pin, so that the pressure roller 425 can press down and guide the insulating mesh 52 on the isolation component 5, so that the insulating mesh 52 can be unwound from the roll 33 and laid horizontally on the top of the movable frame 23. This facilitates the isolation of the cable under the movable frame 23 from the existing facilities under the line construction, and avoids the risk of parts falling from the overhead cable during construction.

[0034] Meanwhile, the pressing assembly 43 includes a pressing plate 431, wear-resistant blocks 432, and an auxiliary structure 433. One end of the pressing plate 431 is connected to the pressing assembly 44, and the other pressing plate 431 is fixed between two connecting blocks 41. Multiple wear-resistant blocks 432 are fixed to the outer wall of the pressing plate 431. The auxiliary structure 433 is set on the top of the pressing plate 431, and multiple wear-resistant blocks 432 are fixed on the opposite side of the two pressing plates 431. This allows the wear-resistant blocks 432 to increase the friction between the insulating mesh 52 between the two pressing plates 431 when the two pressing plates 431 are pressed, thereby improving the stability of clamping the insulating mesh 52.

[0035] The auxiliary structure 433 includes an auxiliary groove 4331, a rotating rod 4332, an auxiliary rod 4333, a torsion spring 4334, and an auxiliary roller 4335. The auxiliary groove 4331 is located at the end of the pressure plate 431. The rotating rod 4332 is rotatably inserted into the inner wall of the auxiliary groove 4331. The auxiliary rod 4333 is rotatably inserted into the outer wall of the rotating rod 4332. The bottom of the auxiliary rod 4333 is rotatably connected to the inner cavity of the auxiliary groove 4331. The torsion spring 4334 is installed on the auxiliary rod 4333 and the auxiliary groove 4335. Between 331, torsion spring 4334 is sleeved on the outer wall of rotating rod 4332. Auxiliary roller 4335 rotates between two adjacent auxiliary rods 4333 via rotating pin. The setting of torsion spring 4334 makes it easy for auxiliary roller 4335 to fit against the outer wall of insulating mesh 52 without pressure, so that insulating mesh 52 can be stably unwound between the two auxiliary rollers 4335, reducing frictional damage between the mesh surface and wear-resistant block 432 when the insulating mesh 52 is unwound, and improving the service life of insulating mesh 52.

[0036] More specifically, the pressing assembly 44 includes a slot 441, a pin 442, a pressing rod 443, an extension rod 444, a pressing block 445, a limiting rod 446, a compression spring 447, and an arc rod 448. The slot 441 is formed on one side of the connecting block 41. The pin 442 is fixed to one end of the inner wall of the slot 441. The pressing rod 443 rotatably passes through the outer wall of the pin 442. The pressing rod 443 is rotatably connected to the inner cavity of the slot 441, which facilitates the pressing rod 443 to move within the slot 441 with the pin 442 as the axis. The cavity rotates, and the extension rod 444 is fixed to the end of one of the pressure plates 431. The extension rod 444 is rotatably inserted through one end of the adjacent lower pressure rod 443 via a bearing. The lower pressure block 445 is slidably inserted into the inner cavity of the slot 441. The bottom of the lower pressure block 445 is in contact with the outer wall of the lower pressure rod 443, and the top of the lower pressure block 445 is fixedly connected to the bottom of the movable rod 423. The limiting rod 446 is slidably inserted into the bottom of the lower pressure block 445 and fixed to the top of the inner wall of the slot 441. The compression spring 447 is fixed between the lower pressure rod 443 and the slot 441. The arc rod 448 is sleeved in the inner cavity of the compression spring 447. One end of the arc rod 448 is fixed to the bottom of the lower pressure rod 443, and the other end of the arc rod 448 slides through the outer wall of the slot 441. Through the elasticity of the compression spring 447, the lower pressure rod 443 can be elastically pushed, so that it can elastically support one of the pressure plates 431. After the insulating net 52 is laid on the movable frame 23, the second electric telescopic rod 422 is activated, which drives the movable rod 423 to press down. This allows the pressure roller 425 to slowly press the insulating mesh 52 against the positioning plate 31. At the same time, the lower pressure block 445 presses down on the lower pressure rod 443, which in turn pulls one of the pressure plates 431. Under the position limitation of the inclined groove 46, one of the pressure plates 431 can press the insulating mesh 52 tightly between the two pressure plates 431, further improving the stability of the position of the insulating mesh 52 and its support performance for objects. This ensures that the insulating mesh 52 is taut on the top of the movable frame 23, reducing the risk of parts falling during overhead line construction.

[0037] The working principle of this invention is as follows: In use, the telescopic height of the telescopic frame 21 is adjusted according to the height of the existing facility. The mounting plate 51 at one end of the insulating mesh 52 is installed on the movable frame 23, and the two support frames 1 are respectively set on both sides of the existing facility to be erected. By activating the control switch 8, the first electric telescopic rod 24 drives the movable frame 23 to move, so that the movable frame 23 can extend into the top of the existing facility (such as the existing cable facility) and can be inserted into the inner cavity of two of the telescopic frames 21, so that the supporting mechanism 2 can be stably erected on the frame of the support frame 1 above the existing facility. The second electric telescopic rod 422 is driven to drive the movable rod 423 to press down. The pressure roller 425 slowly presses the insulating mesh 52 against the positioning plate 31, and at the same time the pressing block 445 presses down the pressing rod 443, so that the pressing rod 443 pulls one of the pressure plates 431. With the position of the inclined groove 46 limited, one of the pressure plates 431 can press the insulating mesh 52 between the two pressure plates 431. The insulating mesh 52 is tightly stretched on the top of the movable frame 23, which makes it convenient for workers to carry out the construction of electrical processing lines above the existing facilities. The lines can be dragged and drooped on the insulating mesh 52, reducing the risk of parts or lines falling to the ground and improving the safety during construction.

[0038] If this patent uses terms such as "first" and "second" to define components, those skilled in the art should know that the use of "first" and "second" is merely for the convenience of describing the invention and simplifying the description, and the above terms have no special meaning.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this invention is defined by the appended claims and their equivalents.

[0040] In the description of this invention, it should be understood that the terms "front", "rear", "left", "right", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

Claims

1. An isolation device for construction of overhead power lines, characterized in that: It includes a support frame, a load-bearing mechanism mounted on top of the support frame, an installation mechanism and a connecting mechanism installed at one end of the load-bearing mechanism, and an isolation component wound around the middle of the installation mechanism. The installation mechanism is also equipped with a rotating disk and a beaded rope that engages with the installation mechanism. The supporting mechanism includes a telescopic frame, a movable frame, a first electric telescopic rod, and a connecting plate for fixing adjacent telescopic frames. The telescopic frame slides vertically through the top of the support frame and adjusts its height by extending and retracting under the action of a control switch installed on the outer wall of the support frame. The movable frame slides horizontally through one end of the two opposing telescopic frames and moves horizontally under the action of the first electric telescopic rod fixed to one end of the connecting plate. The connecting mechanism includes a connecting block, a lifting assembly, multiple pressing net assemblies, a pressing down assembly, and corresponding limiting posts and inclined slots. The connecting block is fixed on one side of the mounting mechanism, the lifting assembly is installed between two connecting blocks, multiple pressing net assemblies are arranged opposite each other on both sides of the isolation assembly, and the pressing down assembly is installed at the end of a pressing net assembly. Multiple limiting posts are fixed at the end of a pressing net assembly, and multiple inclined slots are opened on the opposite sides of multiple mounting frames. The limiting posts are slidably inserted into the inner cavities of adjacent inclined slots for pressing the pressing net assembly vertically onto another pressing net assembly. The isolation assembly includes a mounting plate and an insulating mesh. The mounting plate is inserted through one end of the movable frame, and the insulating mesh is wound on a reel with one end fixed to the top of the mounting plate, providing full protection for the telescopic frame and the movable frame.

2. The isolation device for construction of overhead power lines according to claim 1, characterized in that: The installation mechanism includes a positioning plate, a mounting frame, and a reel. The positioning plate is fixed on two telescopic frames, and the reel is rotatably mounted on the mounting frames fixed at both ends of the positioning plate. The rotating disk is fixed to one end of the reel and rotates under the pull of the meshing beaded rope.

3. The isolation device for construction of overhead power lines according to claim 1, characterized in that: The lifting assembly includes a fixed rod, a second electrically operated telescopic rod, a movable rod, a lifting rod, and a pressure roller. The fixed rod is fixed between the two connecting blocks, and the second electric telescopic rod is fixedly inserted through the middle of the fixed rod; The movable pole is fixed to the top of the second electric telescopic pole; The lifting rod is slidably inserted into the middle of the connecting block, and multiple lifting rods are fixed to the ends of the movable rod; The pressure roller rotates between two adjacent lifting rods via a rotating pin.

4. The isolation device for construction of overhead power lines according to claim 1, characterized in that: The pressure mesh assembly includes a pressure plate, wear-resistant blocks, and an auxiliary structure. One end of the pressure plate is connected to the lower pressure assembly, and the other pressure plate is fixed between the two connecting blocks. Wear-resistant blocks are fixed on the outer wall of the pressure plate and arranged opposite to each other. The auxiliary structure is located on the top of the pressure plate.

5. The isolation device for construction of overhead power lines according to claim 1, characterized in that: The auxiliary structure includes an auxiliary groove on the pressure plate, a rotating rod that rotatably passes through the inner wall of the auxiliary groove, an auxiliary rod rotatably mounted on the rotating rod, a torsion spring, and an auxiliary roller. The bottom of the auxiliary rod is rotatably connected to the inner cavity of the auxiliary groove. The torsion spring is installed between the auxiliary rod and the auxiliary groove and sleeved on the outer wall of the rotating rod. The auxiliary roller rotates between two adjacent auxiliary rods via a rotating pin.

6. The isolation device for construction of overhead power lines according to claim 1, characterized in that: The pressing assembly includes a slot and a pressing rod rotatably disposed in the slot, a pressing block that is attached to the outer wall of the pressing rod, and an extension rod fixed to the end of a pressure plate. The extension rod is rotatably inserted into one end of an adjacent pressing rod through a bearing. The bottom of the pressing block has an elongated hole and a limiting rod fixed to the inner wall of the slot is inserted therein, and the top of the pressing block is fixedly connected to the end of the movable rod. An arc rod is fixed to the lower side wall of the pressure rod and slides through the outer wall of the slot. A compression spring is also sleeved on the arc rod and limited between the pressure rod and the side wall of the slot.

7. The isolation device for construction of overhead power lines according to claim 1, characterized in that: The second electric telescopic rod is controlled to extend and retract via a corresponding control switch.

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