Overhead power transmission line hot-line work protection device

Abstract

The invention discloses an overhead transmission line hot-line work protection device, and relates to the technical field of hot-line work, the overhead transmission line hot-line work protection device comprises a first telescopic mechanism, the first telescopic mechanism is fixedly installed at the position, close to the middle, of the top of a supporting assembly, and the supporting assembly is used for supporting and limiting between the first telescopic mechanism and an elevator. According to the overhead transmission line hot-line work protection device, the moving trolley follows erection of a cable, a worm is externally connected with a driving motor to drive a first telescopic ring to rotate upwards, a driving gear is externally connected with a driving motor to drive a second telescopic ring to rotate upwards, and the first telescopic ring and the second telescopic ring protect the erected cable therein; the circumferential protection of the first telescopic ring and the second telescopic ring can avoid the use of a large-area net to protect the cable, and solves the problem that the high-voltage wire erection protection equipment is complex in structure, is large in size, and is liable to be interfered by the environment.

Description

Technical Field

[0001] The invention relates to the technical field of live working, and in particular to a protective device for live working on overhead power transmission lines. Background Art

[0002] In power grid transmission and transformation projects, it is often necessary to cross transmission lines, roads, etc. for construction. In order to ensure the power supply reliability of the crossed power lines, live crossing construction plans are usually adopted. Live crossing construction plans In order to ensure the safe distance between the newly built transmission lines or maintenance and inspection lines and the objects to be crossed, it is necessary to set up an insulating net or a crossing frame between the two in advance. Traditional crossing frames require a lot of manpower to climb and build. There are no relevant intelligent safety measures during the construction process to standardize the construction and disassembly processes. The assembly or disassembly time for a single use is long, which will affect the construction period and construction safety of the transmission lines and greatly increase the manual labor force. The Chinese patent announcement number is: CN112366588B discloses "A live transmission line crossing device". In this patent, a cross-type lifting mechanism and a folding and unfolding mechanism are set up, and the folding and unfolding mechanism is driven by a driving component to push the cross-type lifting mechanism to perform rapid lifting and folding. The lifting height range is large and the applicability is strong. It can adapt to work under strong wind conditions, effectively reduce labor costs, and is easy to transport, install and disassemble. The installation and disassembly efficiency is high, and the construction period is effectively shortened. By setting a cross-type lifting mechanism and a folding and unfolding mechanism, the crossing device can be quickly lowered for inspection and maintenance in the event of a fault, and the disassembled cross-type lifting mechanism can be reused, effectively improving the recycling rate of the device.

[0003] The existing overhead transmission line live working protection devices have problems such as complex structure and large size of high-voltage wire erection protection equipment, which are easily affected by environmental interference, and cannot effectively protect fallen overhead cables due to structural design defects. Summary of the invention

[0004] The present invention provides a protective device for live working on overhead power transmission lines, which solves the problems mentioned in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A protective device for live working on overhead power transmission lines, comprising a mobile trolley, a gravity detection device is fixedly connected to the top of the mobile trolley, a lift is rotatably connected to the top of the gravity detection device, and further comprising: A support assembly, wherein the support assembly is fixedly mounted on the top of the lift; A first telescopic mechanism, which is fixedly mounted on the top of the support assembly near the middle, and the support assembly is used for supporting and limiting the first telescopic mechanism and the elevator; A second telescopic mechanism, the second telescopic mechanism is fixedly mounted on the top of the support assembly near the edge, and the second telescopic mechanism and the first telescopic mechanism are used for fall protection during installation of the high-voltage cable; A pressing mechanism, which is fixedly mounted above the surface of the first telescopic mechanism and is used to clamp and limit the falling cable; The first telescopic mechanism includes a first shell, which is fixedly installed at a position near the middle of the top of the support assembly, a worm is rotatably connected to the middle position of the inner side surface of the first shell, a first telescopic ring is slidably connected to the inner side surface of the first shell, a first motor is fixedly connected to the top of the first telescopic ring, a first clamping assembly is fixedly connected to the output end of the first motor, and a first winding assembly is fixedly connected to the inner side surface of the first telescopic ring.

[0006] Preferably, an arc plate is fixedly connected to the inner side surface of the first shell, a tooth surface is provided on the outer surface of the first telescopic ring, the outer surface of the first telescopic ring meshes with the surface of the worm, and a receiving bearing is fixedly connected to the top of the first telescopic ring. The existing cable installation protection device uses four elevators to pull and fix the four points of the large net, so as to intercept and protect the fallen cables during the cable installation process. The area of ​​the large net is very large and difficult to control, and the positioning and fixation of the four-point support elevator is also easily affected by the environment. In the device, the mobile trolley drives the elevator to move, and the elevators arranged in opposite directions control the overall movement and lifting of the first telescopic mechanism and the second telescopic mechanism.

[0007] Preferably, the support assembly includes a connecting frame, the bottom of which is fixedly mounted on the top of the elevator, a support platform is fixedly connected to the middle position of the inner side of the connecting frame, and the top of the support platform is fixedly connected to the bottom of the first shell.

[0008] Preferably, an extension platform is fixedly connected to the side position of the connection frame surface, a bending plate is fixedly connected to the edge position of the inner side surface of the connection frame, a connecting rod is fixedly connected to the upper position of the inner side surface of the bending plate, and a rubber plate is fixedly connected to the top of the bending plate. When the cable falls on the surface of the large net, it is easy to slide downward due to its heavy weight. The four supporting elevators are fixedly distributed in a rectangular shape, and the area of ​​the large net is very large to effectively protect the installed cables. In this device, two elevators are used to move with the installed cables, and the second shell and the first shell are overlapped up and down. The first shell is firmly limited by the support platform and the extension platform, and the second shell is limited by the lateral bending plate. At the same time, the second shell and the first shell are connected by an arc plate and a median bar.

[0009] Preferably, the second telescopic mechanism includes a second shell, which is fixedly installed above the surface of the bending plate, a center bar is fixedly connected to the middle position of the bottom of the second shell, and a driving gear is rotatably connected to the middle position of the inner side surface of the second shell.

[0010] Preferably, the inner side surface of the second shell is rotatably connected to the second telescopic ring, there are two second telescopic rings, the tops of the two second telescopic rings are respectively fixedly connected to the second motor and the guide bearing, the inner side surface of the second telescopic ring is fixedly connected to the second winding assembly, the output end of the second motor is fixedly connected to the second clamping assembly, when the first telescopic ring moves downward driven by the worm, the first telescopic ring is stored in the interior of the first shell, when the first telescopic ring is driven to move upward, the first telescopic ring is driven to rotate upward to bypass the cable, with the movement of the mobile trolley and the lifting of the elevator, multiple bearing plates form a bracket structure to protect the falling cables, to prevent the high-voltage live cables from falling and causing casualties.

[0011] Preferably, the first clamping assembly includes a screw rod, the end face of which is fixedly mounted on the output end of the first motor, the surface of the screw rod is threadedly connected to an internal threaded barrel, and the bottom of the internal threaded barrel is fixedly connected to a bearing plate.

[0012] Preferably, the first clamping assembly also includes a sliding rod, the end face of the sliding rod is fixedly mounted on the bottom of the first telescopic ring, the surface of the bearing plate is fixedly connected to a clamping plate, the surface of the clamping plate is provided with a hole, and the first motor is fixedly mounted on the top of the first telescopic ring. During installation, the two moving carriages move close to each other, and the end face of the screw rod penetrates into the interior of the receiving bearing. The receiving bearing enables the screw rod to be rotatably connected to the inner side face of the first telescopic ring on the other side, and the protective rope is passed through multiple bearing plates in turn. The two ends of the protective rope are respectively fixedly mounted on the surfaces of the winding rollers on both sides, and the winding motor drives the winding rollers to rotate.

[0013] Preferably, a depression is provided on a side of the surface of the first telescopic ring away from the first clamping assembly, and the first winding assembly comprises an inner embedded plate, which is fixedly mounted on the inner side surface of the first telescopic ring.

[0014] Preferably, the first winding assembly also includes a winding motor, the winding motor is fixedly mounted on the surface of the embedded plate, the output end of the winding motor is fixedly connected to a winding roller, the surface of the winding roller is fixedly connected to a protective rope, the electric turntable is used to control the rotation of the fixed disk, the pressure covering shell is arranged directly above the connecting rod, and a gap is arranged between the bending plates. When the cable falls, the first telescopic ring and the second shell follow the movement of the cable end face, and the cable falls to the surface of the load-bearing plate. The gravity detection device detects the change in the weight of the elevator, and the output end of the gravity detection device is connected to the first motor and the input end of the electric turntable.

[0015] Preferably, the pressing mechanism comprises an electric turntable, which is fixedly installed above the surface of the first shell, and an output end of the electric turntable is fixedly connected to a fixed disk.

[0016] Preferably, the pressing mechanism further comprises a pressing shell, the end surface of which is fixedly mounted on the outer surface of the fixed disk, the side surface of which is fixedly connected to a limiting plate, and the surface of which is rotatably connected to a pressing roller.

[0017] The present invention provides a protective device for live working on overhead power transmission lines. It has the following beneficial effects: 1. The overhead transmission line live working protection device, the mobile trolley follows the cable erection, the worm gear external drive motor drives the first telescopic ring to rotate upward, the drive gear external drive motor drives the second telescopic ring to rotate upward, the first telescopic ring and the second telescopic ring protect the erected cable, when the cable falls, the circumferential protection of the first telescopic ring and the second telescopic ring can avoid the use of a large area net to protect the cable, and solves the problem that the high-voltage wire erection protection equipment has a complex structure and a large volume that is easily affected by the environment.

[0018] 2. In the live working protection device for overhead power transmission lines, the driving gear is arranged in the middle of the second shell surface, so that when the second telescopic ring moves upward, the cable being erected is covered therein. When the cable falls, it is easy to deflect due to its heavy weight. The existing device uses a large net and four-point support to prevent the cable from deflecting. In this device, the arc surface structure formed by the first telescopic ring and the second telescopic ring is used to limit the cable, so that the protection structure is more stable and reliable.

[0019] 3. In the overhead power transmission line live working protection device, the screw rod rotates under the drive of the first motor, and the inner side threads of adjacent internal threaded barrels rotate in opposite directions. The rotation of the screw rod makes the adjacent supporting plates approach each other, and the sliding rod provides sliding and stable support for the movement of the supporting plates. When the cable falls to the surface of the supporting plate, the end face of the cable will pass through the position between the supporting plates, and the supporting plates approaching each other drive the clamping plates to approach, and the clamping plates are used to clamp and limit the end face of the fallen cable, thereby improving the protection effect of the cable.

[0020] 4. In the overhead power transmission line live working protection device, both ends of the protection rope are rolled up, and the tension on the surface of the protection rope increases and is in a stretched state. In the existing device, the cable is protected by the large net stiffness, and the rigidity of the mesh structure is insufficient. When the cable falls, the mesh structure is easy to give way and cannot provide stable support for the cable. When the cable shakes and deflects, it is easy to cause casualties. In the device, the screw rod rotates, so that the clamping plate can clamp and limit the heavy cable more stably and reliably, so that the protection rope and the load-bearing plate can provide stable support for the cable in the longitudinal and transverse directions.

[0021] 5. In the overhead transmission line live working protection device, the first motor drives the lead screw to rotate, and the clamping plate clamps the position of the cable close to the end face, and the drive of the electric turntable causes the pressure covering shell to rotate to cover the surface of the cable. A depression is provided at the position of the connecting rod, and the pressure covering shell causes the cable to be stuck in the depressed position, so that the cable is more reliable when being pressed and limited. The openings on the surface of the pressure covering roller and the clamping plate increase the friction resistance when the fallen cable is clamped, thereby solving the problem of being unable to effectively protect the fallen overhead cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of the overhead power transmission line live working protection device of the present invention when in use; Figure 2 This is a three-dimensional diagram of the overhead power transmission line live working protection device before use; Figure 3 It is a structural schematic diagram of the support assembly of the present invention; Figure 4 It is a structural schematic diagram of the first telescopic mechanism of the present invention; Figure 5 is a structural schematic diagram of the second telescopic mechanism of the present invention; Figure 6 It is a structural schematic diagram of the first clamping assembly of the present invention; Figure 7 It is a structural schematic diagram of the first winding assembly of the present invention; Figure 8 It is a structural schematic diagram of the pressing mechanism of the present invention.

[0023] In the figure: 1. mobile trolley; 2. lift; 3. gravity detection device; 4. support assembly; 41. connection frame; 42. support platform; 43. extension platform; 44. bending plate; 45. connecting rod; 46. rubber plate; 5. first telescopic mechanism; 51. first shell; 52. arc plate; 53. worm; 54. first telescopic ring; 55. first motor; 56. bearing; 57. first clamping assembly; 571. screw rod; 572. internal threaded cylinder; 573. bearing plate; 574. clamping plate ; 575, sliding rod; 58, first winding assembly; 581, embedded plate; 582, winding motor; 583, winding roller; 584, protective rope; 6, second telescopic mechanism; 61, second shell; 62, center bar; 63, driving gear; 64, second telescopic ring; 65, second motor; 66, guide bearing; 67, second clamping assembly; 68, second winding assembly; 7, pressing mechanism; 71, electric turntable; 72, fixed plate; 73, pressing shell; 74, limit plate; 75, pressing roller. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] First embodiment: Figure 1-Figure 3 As shown, the present invention provides a technical solution: a protective device for live working on overhead power transmission lines, comprising a mobile trolley 1, a gravity detection device 3 is fixedly connected to the top of the mobile trolley 1, a lift 2 is rotatably connected to the top of the gravity detection device 3, and further comprising: A support assembly 4, the support assembly 4 is fixedly mounted on the top of the lift 2; A first telescopic mechanism 5, which is fixedly mounted on the top of the support assembly 4 near the middle, and the support assembly 4 is used for supporting and limiting the first telescopic mechanism 5 and the elevator 2; A second telescopic mechanism 6, which is fixedly mounted on the top of the support assembly 4 near the edge. The second telescopic mechanism 6 and the first telescopic mechanism 5 are used for fall protection during installation of high-voltage cables; A pressing mechanism 7, which is fixedly mounted above the surface of the first telescopic mechanism 5 and is used for clamping and limiting the falling cable; The first telescopic mechanism 5 includes a first housing 51, which is fixedly mounted at a position near the middle of the top of the support assembly 4, a worm 53 is rotatably connected to the middle position of the inner side of the first housing 51, a first telescopic ring 54 is slidably connected to the inner side of the first housing 51, a first motor 55 is fixedly connected to the top of the first telescopic ring 54, a first clamping assembly 57 is fixedly connected to the output end of the first motor 55, and a first winding assembly 58 is fixedly connected to the inner side of the first telescopic ring 54; The inner side of the first housing 51 is fixedly connected with an arc plate 52, the outer surface of the first telescopic ring 54 is provided with a tooth surface, the outer surface of the first telescopic ring 54 meshes with the surface of the worm 53, and the top of the first telescopic ring 54 is fixedly connected with a receiving bearing 56; The second telescopic mechanism 6 includes a second housing 61, which is fixedly mounted above the surface of the bending plate 44, a middle position bar 62 is fixedly connected to the middle position of the bottom of the second housing 61, a driving gear 63 is rotatably connected to the middle position of the inner side surface of the second housing 61, and a second telescopic ring 64 is rotatably connected to the inner side surface of the second housing 61; There are two second telescopic rings 64 , and the tops of the two second telescopic rings 64 are respectively fixedly connected with a second motor 65 and a guide bearing 66 , the inner side of the second telescopic ring 64 is fixedly connected with a second winding assembly 68 , and the output end of the second motor 65 is fixedly connected with a second clamping assembly 67 .

[0026] When in use, the existing cable installation protection device uses four lifts to pull and fix the four points of the large net, so as to intercept and protect the fallen cables during the cable installation process. The area of ​​the large net is very large and difficult to control, and the positioning and fixation of the four-point support lift is also easily affected by environmental interference. In this device, the mobile trolley 1 drives the lift 2 to move, and the oppositely arranged lift 2 controls the overall movement and lifting of the first telescopic mechanism 5 and the second telescopic mechanism 6. The mobile trolley 1 follows the installation of the cable, and the worm 53 is connected to a driving motor to drive the first telescopic ring 54 to rotate upward, and the driving gear 63 is connected to a driving motor to drive the second telescopic ring 64 to rotate upward. The first telescopic ring 54 and the second telescopic ring 64 will protect the installed cable. When the cable falls, the circumferential protection of the first telescopic ring 54 and the second telescopic ring 64 can avoid the use of a large area net to protect the cable, thereby solving the problem that the high-voltage wire erection protection equipment has a complex structure and a large volume and is easily affected by the environment.

[0027] Second embodiment: Figure 3 , Figure 4 , Figure 5 As shown, the support assembly 4 includes a connecting frame 41, the bottom of the connecting frame 41 is fixedly installed on the top of the elevator 2, a support platform 42 is fixedly connected to the middle position of the inner side surface of the connecting frame 41, the top of the support platform 42 is fixedly connected to the bottom of the first shell 51, an extension platform 43 is fixedly connected to the side position of the surface of the connecting frame 41, a bending plate 44 is fixedly connected to the edge position of the inner side surface of the connecting frame 41, a connecting rod 45 is fixedly connected to the upper position of the inner side surface of the bending plate 44, and a rubber plate 46 is fixedly connected to the top of the bending plate 44.

[0028] During use, when the cable falls on the surface of the large net, it is easy to slide downward due to its heavy weight. The four supporting elevators are fixedly distributed in a rectangular shape, and the area of ​​the large net is very large to effectively protect the installed cables. In this device, two elevators 2 are used to move with the installed cables. The second shell 61 and the first shell 51 are overlapped up and down. The first shell 51 is firmly limited by the support platform 42 and the extension platform 43, and the second shell 61 is limited by the lateral bending plate 44. At the same time, the second shell 61 and the first shell 51 are engaged with each other through the arc plate 52 and the median bar 62. The driving gear 63 is arranged in the middle position of the surface of the second shell 61, so that the second telescopic ring 64 will cover the cable being installed when it moves upward. When the cable falls, it is easy to deflect due to its heavy weight. The existing device uses a large net and four-point support to prevent the cable from deflecting. In this device, the arc surface structure formed by the first telescopic ring 54 and the second telescopic ring 64 is used to limit the cable, so that the protection structure is more stable and reliable.

[0029] The third embodiment: Figure 3 , Figure 6 As shown, the first clamping assembly 57 includes a screw rod 571, the end face of which is fixedly mounted on the output end of the first motor 55, the surface of the screw rod 571 is threadedly connected to an internal threaded tube 572, the bottom of the internal threaded tube 572 is fixedly connected to a bearing plate 573, the first clamping assembly 57 also includes a slide rod 575, the end face of the slide rod 575 is fixedly mounted on the bottom of the first telescopic ring 54, the surface of the bearing plate 573 is fixedly connected to a clamping plate 574, the surface of the clamping plate 574 is provided with a hole, and a depression is provided on the side of the surface of the first telescopic ring 54 away from the first clamping assembly 57.

[0030] When in use, when the first telescopic ring 54 moves downward under the drive of the worm 53, the first telescopic ring 54 is stored in the interior of the first shell 51. When the first telescopic ring 54 is driven to move upward, the first telescopic ring 54 is driven to rotate upward to bypass the cable. With the movement of the mobile trolley 1 and the lifting and lowering of the elevator 2, multiple bearing plates 573 form a bracket structure to protect the fallen cable and prevent the high-voltage live cable from falling and causing casualties. The screw rod 571 rotates under the drive of the first motor 55. The inner side threads of adjacent internal threaded cylinders 572 have opposite rotation directions. The rotation of the screw rod 571 makes the bearing plates 573 arranged adjacent to each other approach each other. The sliding rod 575 slides and stably supports the movement of the bearing plates 573. When the cable falls to the surface of the bearing plate 573, the end face of the cable will pass through the position between the bearing plates 573. The bearing plates 57 approaching each other drive the clamping plate 574 to approach, and the clamping plate 574 is used to clamp and limit the end face of the fallen cable, thereby making the cable protection effect better.

[0031] Fourth embodiment: Figure 6 , Figure 7 , Figure 8 As shown, the first winding assembly 58 includes an inner plate 581, which is fixedly mounted on the inner side of the first telescopic ring 54. The first winding assembly 58 also includes a winding motor 582, which is fixedly mounted on the surface of the inner plate 581. The output end of the winding motor 582 is fixedly connected to a winding roller 583, and the surface of the winding roller 583 is fixedly connected to a protective rope 584.

[0032] When in use, the first motor 55 is fixedly mounted on the top of the first telescopic ring 54. When installed, the two moving carriages 1 move closer to each other, and the end face of the screw rod 571 penetrates into the interior of the receiving bearing 56. The receiving bearing 56 enables the screw rod 571 to be rotatably connected with the inner side face of the first telescopic ring 54 on the other side, and the protective rope 584 is passed through multiple bearing plates 573 in sequence. The two ends of the protective rope 584 are respectively fixedly mounted on the surfaces of the winding rollers 583 on both sides, and the winding motor 582 drives the winding rollers 583 to rotate, and the protective rope 584 The two ends are rolled up, and the tension on the surface of the protective rope 584 increases and is in a stretched state. In the existing device, the large net stiffness is used to protect the cable. The rigidity of the mesh structure is insufficient. When the cable falls, the mesh structure is easy to give way and cannot provide stable support for the cable. When the cable shakes and deflects, it is easy to cause casualties. In this device, the screw rod 571 rotates, so that the clamping plate 574 can clamp and limit the heavy cable more stably and reliably, so that the protective rope 584 and the load-bearing plate 573 can provide stable support for the cable in the longitudinal and transverse directions.

[0033] Fifth embodiment: Figure 3 , Figure 8 As shown, the top of the support platform 42 is fixedly connected to the bottom of the first shell 51, the side position of the surface of the connection frame 41 is fixedly connected to the extension platform 43, the edge position of the inner side of the connection frame 41 is fixedly connected to the bending plate 44, the upper position of the inner side of the bending plate 44 is fixedly connected to the connecting rod 45, and the top of the bending plate 44 is fixedly connected to the rubber plate 46; The pressing mechanism 7 includes an electric turntable 71, which is fixedly installed at an upper position on the surface of the first shell 51. The output end of the electric turntable 71 is fixedly connected to a fixed disk 72. The pressing mechanism 7 also includes a pressing shell 73. The end face of the pressing shell 73 is fixedly installed on the outer surface of the fixed disk 72. The side position of the pressing shell 73 is fixedly connected to a limiting plate 74. The surface of the limiting plate 74 is rotatably connected to a pressing roller 75.

[0034] When in use, the electric turntable 71 is used to control the rotation of the fixed plate 72, the pressure-covering shell 73 is arranged at a position just above the connecting rod 45, and a gap is arranged between the bending plates 44. When the cable falls, the first telescopic ring 54 and the second shell 61 follow the movement of the cable end face, and the cable falls to the surface of the bearing plate 573. The gravity detection device 3 detects the change in the weight of the elevator 2, and the output end of the gravity detection device 3 is connected to the first motor 55 and the input end of the electric turntable 71. The first motor 55 drives the screw rod 571 to rotate, and the clamping plate 574 clamps the position of the cable close to the end face, and the drive of the electric turntable 71 causes the pressure-covering shell 73 to rotate to cover the surface of the cable. A depression is arranged at the position of the connecting rod 45, and the pressure-covering shell 73 causes the cable to be stuck in the depressed position, so that the cable is more reliable when it is pressed and limited. The openings on the surface of the pressure-covering roller 75 and the clamping plate 574 make the friction resistance greater when the falling cable is clamped, thereby solving the problem of being unable to effectively protect the falling overhead cable.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by... does not exclude the existence of other identical elements in the process, method, article or device including the element".

Claims

1. A protective device for live working on overhead power transmission lines, comprising a mobile trolley (1), characterized in that: The top of the mobile trolley (1) is fixedly connected to a gravity detection device (3), and the top of the gravity detection device (3) is rotatably connected to a lift (2), and further comprises: A support assembly (4), wherein the support assembly (4) is fixedly mounted on the top of the lift (2); A first telescopic mechanism (5), the first telescopic mechanism (5) being fixedly mounted at a position near the middle of the top of the support assembly (4), the support assembly (4) being used for supporting and limiting the first telescopic mechanism (5) and the elevator (2); A second telescopic mechanism (6), the second telescopic mechanism (6) being fixedly mounted at a position close to the edge of the top of the support assembly (4), the second telescopic mechanism (6) and the first telescopic mechanism (5) being used for fall protection during installation of the high-voltage cable; A pressing mechanism (7), the pressing mechanism (7) being fixedly mounted above the surface of the first telescopic mechanism (5), the pressing mechanism (7) being used to clamp and limit the falling cable; The first telescopic mechanism (5) comprises a first housing (51), the first housing (51) being fixedly mounted at a position near the middle of the top of the support assembly (4), a worm (53) being rotatably connected to the middle position of the inner side surface of the first housing (51), a first telescopic ring (54) being slidably connected to the inner side surface of the first housing (51), a first motor (55) being fixedly connected to the top of the first telescopic ring (54), a first clamping assembly (57) being fixedly connected to the output end of the first motor (55), and a first winding assembly (58) being fixedly connected to the inner side surface of the first telescopic ring (54).

2. The protective device for live working on overhead power transmission lines according to claim 1, characterized in that: An arc-shaped plate (52) is fixedly connected to the inner side surface of the first housing (51), a toothed surface is provided on the outer surface of the first telescopic ring (54), the outer surface of the first telescopic ring (54) meshes with the surface of the worm (53), and a receiving bearing (56) is fixedly connected to the top of the first telescopic ring (54).

3. A protective device for live working on overhead power transmission lines according to claim 2, characterized in that: The support assembly (4) comprises a connection frame (41), the bottom of the connection frame (41) is fixedly mounted on the top of the lift (2), a support platform (42) is fixedly connected to the middle position of the inner side surface of the connection frame (41), and the top of the support platform (42) is fixedly connected to the bottom of the first shell (51).

4. The protective device for live working on overhead power transmission lines according to claim 3, characterized in that: An extension platform (43) is fixedly connected to the side surface of the connection frame (41), a bending plate (44) is fixedly connected to the edge of the inner side surface of the connection frame (41), a connecting rod (45) is fixedly connected to the upper position of the inner side surface of the bending plate (44), and a rubber plate (46) is fixedly connected to the top of the bending plate (44).

5. A protective device for live working on overhead power transmission lines according to claim 4, characterized in that: The second telescopic mechanism (6) comprises a second shell (61), the second shell (61) being fixedly mounted above the surface of the bending plate (44), a center bar (62) being fixedly connected to the middle of the bottom of the second shell (61), and a driving gear (63) being rotatably connected to the middle of the inner side surface of the second shell (61).

6. A protective device for live working on overhead power transmission lines according to claim 5, characterized in that: The inner side surface of the second shell (61) is rotatably connected to a second telescopic ring (64), the number of the second telescopic rings (64) being two, the tops of the two second telescopic rings (64) being respectively fixedly connected to a second motor (65) and a guide bearing (66), the inner side surface of the second telescopic ring (64) being fixedly connected to a second winding assembly (68), and the output end of the second motor (65) being fixedly connected to a second clamping assembly (67).

7. The protective device for live working on overhead power transmission lines according to claim 1, characterized in that: The first clamping assembly (57) comprises a screw rod (571), the end face of the screw rod (571) being fixedly mounted on the output end of the first motor (55), the surface of the screw rod (571) being threadedly connected to an internal threaded barrel (572), and the bottom of the internal threaded barrel (572) being fixedly connected to a bearing plate (573).

8. The protective device for live working on overhead power transmission lines according to claim 7, characterized in that: The first clamping assembly (57) further comprises a sliding rod (575), the end surface of which is fixedly mounted on the bottom of the first telescopic ring (54), and a clamping plate (574) is fixedly connected to the surface of the bearing plate (573), wherein a hole is formed on the surface of the clamping plate (574).

9. The protective device for live working on overhead power transmission lines according to claim 1, characterized in that: A recess is provided on a side of the surface of the first telescopic ring (54) away from the first clamping assembly (57), and the first winding assembly (58) comprises an inner plate (581), wherein the inner plate (581) is fixedly mounted on the inner side surface of the first telescopic ring (54).

10. A protective device for live working on overhead power transmission lines according to claim 9, characterized in that: The first winding assembly (58) further comprises a winding motor (582), the winding motor (582) being fixedly mounted on the surface of the inner panel (581), the output end of the winding motor (582) being fixedly connected to a winding roller (583), and the surface of the winding roller (583) being fixedly connected to a protective rope (584).

Images