A lightning protection device for overhead power lines in distribution networks

Abstract

The invention relates to a direct lightning drainage protection device for a distribution network overhead line, which comprises a mounting assembly, an opening and closing drainage assembly and a top discharge assembly. An adjustable bracket is arranged above the mounting assembly, the lower end of the adjustable bracket is mounted on the mounting assembly through a base, a retractable assembly is movably mounted on the upper end of the adjustable bracket, an opening and closing drainage assembly is mounted above the retractable assembly, the retractable assembly is dynamically connected to the opening and closing drainage assembly through a connecting rod mechanism, and is used to drive the opening and closing drainage assembly to realize an opening and closing action; a discharge ball is mounted on the middle part of the inner side of the opening and closing drainage assembly, a top discharge assembly is mounted on the top of the discharge ball, a first discharge gap is formed on the upper part of the top discharge assembly, a second discharge gap is formed between the lower part of the top discharge assembly and the discharge ball, a third discharge gap is formed between the opening and closing drainage assembly and the discharge ball, and the spacing of the third discharge gap is not less than 180 mm; the invention has the advantages of reasonable structure, good drainage effect, dual protection against lightning and birds, and safety and reliability.

Description

Technical Field

[0001] The invention belongs to the technical field of lightning protection for electric power systems, and in particular relates to a direct lightning diversion protection device for overhead lines of a distribution network. Background Art

[0002] Lightning is one of the most important natural factors affecting the safe and stable operation of power transmission and distribution lines. The number of lightning trips accounts for 40% of the total number of trips, and the number of lightning fault shutdowns accounts for 20% of the total number of fault shutdowns. Lightning has seriously affected the safe operation of the power grid and the safety and reliability of power supply and electricity use. At present, the lightning protection of 10KV lines mainly considers the installation of lightning arresters. The maintenance and detection during operation are very difficult. According to the standard requirements, the lightning arrester needs to be removed from the line for inspection regularly. The power company considers power outages and other factors and it is impossible to complete it. That is to say, it is possible that the lightning arrester is running with a disease, but it is difficult to find it during operation, so the lightning protection effect of the lightning arrester is greatly reduced. In addition, most of the current 10KV line bird protection considers the installation of bird repellers and bird-proof spikes, and the operation effect is very poor, and it does not affect the situation that birds continue to build nests on the poles at all. Therefore, it is very necessary to provide a distribution network overhead line direct lightning diversion protection device with a reasonable structure, good diversion effect, double protection against lightning and birds, and safe and reliable. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a distribution network overhead line direct lightning diversion protection device which has a reasonable structure, good diversion effect, dual protection against lightning and birds, and is safe and reliable.

[0004] The object of the present invention is achieved in this way: a distribution network overhead line direct lightning drainage protection device, which includes a mounting assembly, an opening and closing drainage assembly and a top discharge assembly, an adjustable bracket is arranged above the mounting assembly, the lower end of the adjustable bracket is mounted on the mounting assembly through a base, a retractable assembly is movably mounted on the upper end of the adjustable bracket, an opening and closing drainage assembly is installed above the retractable assembly, the retractable assembly is dynamically connected to the opening and closing drainage assembly through a connecting rod mechanism, and is used to drive the opening and closing drainage assembly to realize the opening and closing action; a discharge ball is installed in the middle of the inner side of the opening and closing drainage assembly, a top discharge assembly is installed on the top of the discharge ball, the upper part of the top discharge assembly forms a first discharge gap, the lower part of the top discharge assembly and the discharge ball form a second discharge gap, the opening and closing drainage assembly and the discharge ball form a third discharge gap, and the spacing of the third discharge gap is not less than 180mm.

[0005] The mounting assembly includes a mounting seat, above which is a fixing plate, which is connected to the base by a plurality of fixing bolts arranged with the center point of the fixing plate as an array point, a group of front-to-back symmetrical connecting seats are arranged on both sides of the outer periphery of the mounting seat, and hollow support arms arranged obliquely are installed on the outer sides of the connecting seats, and locking clamps are inserted into the ends of the support arms close to each other, and the locking clamps are connected to the corresponding support arms through hinged rods, and locking bolts are installed at the openings of the locking clamps; a group of springs are arranged on the side of the locking clamps close to the mounting seat, and the free ends of the springs are connected to the inner wall of the support arms through positioning pin seats.

[0006] The base includes a bottom plate connected to a fixed plate, a ball bearing seat is arranged above the bottom plate, a plurality of stable support frames are arranged above the ball bearing seat in a circle, the stable support frames are connected by a plurality of reinforcing ring plates arranged up and down, and the base is connected to the adjustable bracket through the stable support frame.

[0007] The adjustable bracket includes a vertical rod connected to a stable support frame, an L-shaped plate is installed on the top of the vertical rod, and a connecting plate inclined upward is installed on the top of the L-shaped plate. The adjustable bracket is movably connected to the retractable assembly through the connecting plate.

[0008] The retractable assembly includes a base frame, a meshing gear moving device is arranged inside the base frame, rotating handles are installed on the front and rear sides of the meshing gear moving device, a gear rod meshingly connected to the meshing gear moving device is arranged above the base frame, an articulated positioning seat hinged to the connecting plate is arranged above the gear rod, and a top mounting rod connected to the opening and closing drainage assembly is arranged above the articulated positioning seat.

[0009] The base frame of the retractable assembly is connected to the opening and closing drainage assembly through a plurality of connecting rod mechanisms formed in an array with the center of the base frame as the center point, so as to drive the opening and closing action of the opening and closing drainage assembly; the connecting rod mechanism includes a pull rod, the lower end of which is connected to the base frame through a lower U-shaped pull seat, and the upper end of which is connected to the opening and closing drainage assembly through an upper U-shaped pull seat.

[0010] The opening and closing drainage assembly includes a center seat connected to the top mounting rod, and a plurality of inward-retracting plates are evenly arranged on the outer periphery of the center seat. The inner ends of the inward-retracting plates are fixedly connected to the center seat through connecting sections, and reinforcing ribs are installed on the outer surfaces of the inward-retracting plates. The reinforcing ribs extend to one end of the outer side of the connecting section and are connected to the upper U-shaped pull seat; the third discharge gap formed by the inward-retracting plates and the discharge balls after unfolding is not less than 200 mm.

[0011] Slide rails are installed on the inner side surfaces of the inner retracting plates, and a plurality of support frames corresponding to the inner retracting plates are arranged on the outer periphery above the center seat. The support frames are slidably connected to the slide rails through sliders, and the inner upper ends of the inner retracting plates are connected to the support frames through arc rods.

[0012] The top discharge assembly includes an insulating seat, a mounting column connected to the discharge ball is arranged below the insulating seat, and a plurality of collector orifice plates are installed in a ring array on the outer edge below the insulating seat. A plurality of longitudinally arranged discharge holes are opened on the collector orifice plates, and the second discharge gap formed by the collector orifice plates and the discharge ball has a spacing of not less than 150 mm.

[0013] A conical seat is arranged above the insulating seat, a plurality of collector plates are evenly arranged on the outer periphery of the conical seat, a discharge tip is arranged above the conical seat and is located inside the collector plate, and a first discharge gap spacing formed by the collector plate and the discharge tip is not less than 100 mm.

[0014] Beneficial effects of the invention: the invention is a direct lightning drainage protection device for distribution network overhead lines. In use, the invention is installed on the original line insulator through a mounting seat. Through the first discharge gap formed by the upper part of the top discharge component, the second discharge gap formed by the lower part of the top discharge component and the discharge ball, and the third discharge gap formed by the opening and closing drainage component and the discharge ball, when the overhead line is struck by direct lightning and induced lightning, the first discharge gap at the top begins to discharge first. If the top gap cannot meet the discharge, the second discharge gap supplements the discharge. In case of thunderstorm weather, the third discharge gap formed by the unfolded opening and closing drainage component and the discharge ball also discharges. The three-level discharge gap provides a flashover channel for lightning, avoiding the burning or damage of the insulator shed and even the burning of the wire. Moreover, in daily use, the opening and closing drainage components in the folded state can effectively prevent birds from building nests, completely solve the problems of bird nesting, short-circuit tripping of lines and power equipment caused by bird damage such as bird droppings and flashover, and ensure the safe operation of the power grid; the settings of the first discharge gap of 100mm, the second discharge gap of 150mm and the third discharge gap of 180-200mm meet the requirements, and can smoothly and effectively prevent insulator damage. At the same time, the setting of the gap has a better bird-proofing effect, so that the present invention can achieve effective integration of line lightning protection and line insulation level and bird-proofing, so that the line has dual protection against lightning and bird damage, and the line operation quality is greatly improved; the present invention has the advantages of reasonable structure, good drainage effect, dual protection against lightning and bird, and safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the present invention.

[0016] Figure 2 It is a schematic diagram of the structure of the installation assembly of the present invention.

[0017] Figure 3 It is a structural schematic diagram of the opening and closing drainage component of the present invention.

[0018] Figure 4 For the present invention Figure 4 A partial structural front view.

[0019] Figure 5 For the present invention Figure 4 Schematic diagram of part of the structure.

[0020] Figure 6 It is a schematic structural diagram of the top discharge assembly of the present invention.

[0021] In the figure: 1, mounting assembly 11, mounting seat 12, fixing plate 13, fixing bolt 14, connecting seat 15, support arm 16, locking clamp 17, hinge rod 18, locking bolt 19, spring 101, positioning pin seat 2, base 21, bottom plate 22, ball bearing seat 23, stable support frame 24, reinforcing ring plate 3, adjustable bracket 31, vertical rod 32, L-shaped plate 33, connecting plate 4, retractable assembly 41, base frame 42, meshing gear moving device 43, rotating handle 44, gear Rod 45, hinged positioning seat 46, top mounting rod 5, connecting rod mechanism 51, pull rod 52, lower U-shaped pull seat 53, upper U-shaped pull seat 6, opening and closing drainage assembly 61, center seat 62, retracting plate 621, connecting section 63, reinforcing ribs 64, slide rail 65, support frame 66, slider 67, arc rod 7, discharge ball 8, top discharge assembly 81, insulating seat 82, mounting column 83, collector hole plate 84, discharge hole 85, conical seat 86, collector plate 87, discharge tip. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings. Example

[0023] like Figure 1-6As shown, a direct lightning drainage protection device for distribution network overhead lines includes a mounting assembly 1, an opening and closing drainage assembly 6 and a top discharge assembly 8, wherein an adjustable bracket 3 is arranged above the mounting assembly 1, and the lower end of the adjustable bracket 3 is mounted on the mounting assembly 1 through a base 2, and a retracting assembly 4 is movably mounted on the upper end of the adjustable bracket 3, and an opening and closing drainage assembly 6 is installed above the retracting assembly 4, and the retracting assembly 4 is dynamically connected to the opening and closing drainage assembly 6 through a connecting rod mechanism 5, so as to drive the opening and closing drainage assembly 6 to realize the opening and closing action; a discharge ball 7 is installed in the middle part of the inner side of the opening and closing drainage assembly 6, and a top discharge assembly 8 is installed on the top of the discharge ball 7, and the upper part of the top discharge assembly 8 forms a first discharge gap, and the lower part of the top discharge assembly 8 and the discharge ball 7 form a second discharge gap, and the opening and closing drainage assembly 6 and the discharge ball 7 form a third discharge gap, and the spacing of the third discharge gap is not less than 180 mm.

[0024] The present invention is a direct lightning drainage protection device for distribution network overhead lines. In use, the present invention is installed on the original line insulator through a mounting seat 1. Through the first discharge gap formed by the upper part of the top discharge component 8, the second discharge gap formed by the lower part of the top discharge component 8 and the discharge ball 7, and the third discharge gap formed by the opening and closing drainage component 6 and the discharge ball 7, when the overhead line is struck by direct lightning and induced lightning, the first discharge gap at the top begins to discharge first. If the top gap cannot meet the discharge, the second discharge gap supplements the discharge; in case of thunderstorm weather, the third discharge gap formed by the unfolded opening and closing drainage component 6 and the discharge ball 7 also discharges. The three-level discharge gap provides a flashover channel for lightning, avoiding the burning or damage of the insulator shed and even the burning of the wire; and And in daily use, the opening and closing drainage component 6 in the folded state can effectively prevent birds from building nests, completely solve the problems of bird nesting, line and power equipment short-circuit tripping accidents caused by bird damage such as bird droppings and flashover, and ensure the safe operation of the power grid; the setting of the first discharge gap of 100mm, the second discharge gap of 150mm and the third discharge gap of 180-200mm meet the requirements, and can smoothly and effectively prevent insulator damage. At the same time, the setting of the gap has a better bird-proof effect, so that the present invention can achieve effective integration of line lightning protection and line insulation level and bird-proofing, so that the line is protected by both lightning protection and bird protection, and the line operation quality is greatly improved; the present invention has the advantages of reasonable structure, good drainage effect, dual protection against lightning and birds, and safety and reliability. Example

[0025] like Figure 1-6As shown, a direct lightning drainage protection device for distribution network overhead lines includes a mounting assembly 1, an opening and closing drainage assembly 6 and a top discharge assembly 8, wherein an adjustable bracket 3 is arranged above the mounting assembly 1, and the lower end of the adjustable bracket 3 is mounted on the mounting assembly 1 through a base 2, and a retractable assembly 4 is movably mounted on the upper end of the adjustable bracket 3, and an opening and closing drainage assembly 6 is installed above the retractable assembly 4, and the retractable assembly 4 is dynamically connected to the opening and closing drainage assembly 6 through a connecting rod mechanism 5, so as to drive the opening and closing drainage assembly 6 to realize the opening and closing action; a discharge ball 7 is installed in the middle part of the inner side of the opening and closing drainage assembly 6, and a top discharge assembly 8 is installed on the top of the discharge ball 7, and the upper part of the top discharge assembly 8 forms a first discharge gap, the lower part of the top discharge assembly 8 and the discharge ball 7 form a second discharge gap, and the opening and closing drainage assembly 6 and the discharge ball 7 form a third discharge gap.

[0026] The mounting assembly 1 includes a mounting seat 11, and a fixing plate 12 is located above the mounting seat 11. The fixing plate 12 is connected to the base 2 by a plurality of fixing bolts 13 formed by an array with its center point as an array point. A group of front-to-back symmetrical connecting seats 14 are arranged on both sides of the outer periphery of the mounting seat 11. An inclined hollow support arm 15 is installed on the outer side of the connecting seat 14. A locking clamp 16 is inserted into the inner side of the end of the support arm 15 close to each other. The locking clamp 16 is connected to the corresponding support arm 15 through a hinge rod 17, and a locking bolt 18 is installed at the opening of the locking clamp 16; a group of springs 19 are arranged on the side of the locking clamp 16 close to the mounting seat 11, and the free ends of the springs 19 are connected to the inner wall of the support arm 15 through a positioning pin seat 101.

[0027] The base 2 includes a bottom plate 21 connected to the fixed plate 12, a ball bearing seat 22 is arranged above the bottom plate 21, and a plurality of stable support frames 23 are arranged above the ball bearing seat 22 in a circle. The stable support frames 23 are connected by a plurality of reinforcing ring plates 24 arranged up and down, and the base 2 is connected to the adjustable bracket 3 through the stable support frame 23.

[0028] The adjustable bracket 3 includes a vertical rod 31 connected to the stable support frame 23, an L-shaped plate 32 is installed on the top of the vertical rod 31, and a connecting plate 33 inclined upward is installed on the top of the L-shaped plate 32. The adjustable bracket 3 is movably connected to the retractable assembly 4 through the connecting plate 33.

[0029] In this embodiment, through the setting of the adjustable component, the hinged positioning seat can be driven to rotate around the connecting plate by controlling the rotating handle, thereby adjusting the angle of the opening and closing drainage component and the top discharge component, thereby facilitating better drainage operations and greatly improving the use effect and practicality of the device of the present invention.

[0030] The retractable assembly 4 includes a base frame 41, a meshing gear moving device 42 is arranged inside the base frame 41, and rotating handles 43 are installed on the front and rear sides of the meshing gear moving device 42. A gear rod 44 meshingly connected to the meshing gear moving device 42 is arranged above the base frame 41, and an articulated positioning seat 45 hinged to the connecting plate 33 is arranged above the gear rod 44. A top mounting rod 46 connected to the opening and closing drainage assembly 6 is arranged above the articulated positioning seat 45.

[0031] The base frame 41 of the retractable assembly 4 is connected to the opening and closing drainage assembly 6 through a plurality of connecting rod mechanisms 5 formed in an array with the center of the base frame 41 as the center point, so as to drive the opening and closing action of the opening and closing drainage assembly 6; the connecting rod mechanism 5 includes a pull rod 51, the lower end of which is connected to the base frame 41 through a lower U-shaped pull seat 52, and the upper end is connected to the opening and closing drainage assembly 6 through an upper U-shaped pull seat 53.

[0032] The opening and closing drainage assembly 6 includes a center seat 61 connected to the top mounting rod 46, and a plurality of inward-retracting plates 62 are evenly arranged on the outer periphery of the center seat 61. The inner ends of the inward-retracting plates 62 are fixedly connected to the center seat 61 through connecting sections 621. Reinforcing ribs 63 are installed on the outer surfaces of the inward-retracting plates 62. The reinforcing ribs 63 extend to one end of the outer side surface of the connecting section 621 and are connected to the upper U-shaped pull seat 53. After unfolding, the third discharge gap formed by the inward-retracting plates 62 and the discharge ball 7 is not less than 200 mm.

[0033] Slide rails 64 are installed on the inner side surfaces of the inner retracting plates 62, and a plurality of support frames 65 corresponding to the inner retracting plates 62 are arranged on the outer periphery above the center seat 61. The support frames 65 are slidably connected to the slide rails 64 via sliders 66, and the inner upper ends of the inner retracting plates 62 are connected to the support frames 65 via arc rods 67.

[0034] The top discharge assembly 8 includes an insulating seat 81, a mounting column 82 connected to the discharge ball 7 is arranged below the insulating seat 81, and a plurality of collector orifice plates 83 are installed in a ring array on the outer edge below the insulating seat 81. The collector orifice plates 83 are each provided with a plurality of longitudinally arranged discharge holes 84. The second discharge gap formed by the collector orifice plates 83 and the discharge ball 7 is not less than 150 mm.

[0035] A conical seat 85 is arranged above the insulating seat 81, and a plurality of collector plates 86 are evenly arranged on the outer periphery of the conical seat 85. A discharge tip 87 located inside the collector plate 86 is arranged above the conical seat 85, and a first discharge gap spacing formed by the collector plate 86 and the discharge tip 87 is not less than 100 mm.

[0036] In this embodiment, the device of the present invention reduces the hazard of lightning strikes by dissipating charges through the first discharge gap and / or the second discharge gap. The first discharge gap avoids charge accumulation by discharging through multiple collector plates and small energy discharge tips, so that discharge can begin when the accumulated charge coulomb amount is very small; the second discharge gap discharges through multiple collector holes and discharge balls to form multiple discharging electrode gaps. The small energy and high frequency sharp discharges of multiple discharging electrode gaps avoid ground charge accumulation, prevent the formation of lightning ionization channels, and avoid or reduce the possibility of lightning strikes; in addition, each collector hole plate has multiple discharge holes. The function of the multiple discharge holes on the collector hole plate is to protect the equipment by discharge. When the collector hole plate is struck by lightning, the gas in the discharge hole will be ionized to form plasma, produce a discharge effect, thereby releasing overvoltage and protecting the equipment from damage, thus forming a fourth discharge gap and improving the safety of the power system. It effectively reduces the hazard of lightning strikes to overhead lines and improves the safety and stability of the power system; When encountering thunderstorm weather, the meshing gear moving device is remotely controlled in advance. Since the meshing gear moving device is meshed with the gear rod for transmission, the meshing gear moving device can move along the gear rod. When the meshing gear moving device moves along the gear rod, the meshing gear moving device drives the corresponding inner retracting plate to unfold through the upper U-shaped pull seat of the connecting rod mechanism. During the unfolding of the inner retracting plate, the slider is slidably connected to the slide rail, and cooperates with the arc rod to make the unfolding and closing of the inner retracting plate stable and reliable (the overall opening and closing action of the inner retracting plate is similar to the opening and closing action of an umbrella), thereby forming a third discharge gap between the unfolded inner retracting plate and the discharge ball, which cooperates with the first and second discharge gaps to form a three-level discharge gap structure, which can quickly, reliably and effectively discharge the charge to reduce or avoid the harm of lightning strikes to overhead lines and ensure the safety of the circuit.

[0037] The present invention is a direct lightning drainage protection device for distribution network overhead lines. In use, the present invention is installed on the original line insulator through a mounting seat 1. Through the first discharge gap formed by the upper part of the top discharge component 8, the second discharge gap formed by the lower part of the top discharge component 8 and the discharge ball 7, and the third discharge gap formed by the opening and closing drainage component 6 and the discharge ball 7, when the overhead line is struck by direct lightning and induced lightning, the first discharge gap at the top begins to discharge first. If the top gap cannot meet the discharge, the second discharge gap supplements the discharge; in case of thunderstorm weather, the third discharge gap formed by the unfolded opening and closing drainage component 6 and the discharge ball 7 also discharges. The three-level discharge gap provides a flashover channel for lightning, avoiding the burning or damage of the insulator shed and even the burning of the wire; and And in daily use, the opening and closing drainage component 6 in the folded state can effectively prevent birds from building nests, completely solve the problems of bird nesting, line and power equipment short-circuit tripping accidents caused by bird damage such as bird droppings and flashover, and ensure the safe operation of the power grid; the setting of the first discharge gap of 100mm, the second discharge gap of 150mm and the third discharge gap of 180-200mm meet the requirements, and can smoothly and effectively prevent insulator damage. At the same time, the setting of the gap has a better bird-proof effect, so that the present invention can achieve effective integration of line lightning protection and line insulation level and bird-proofing, so that the line is protected by both lightning protection and bird protection, and the line operation quality is greatly improved; the present invention has the advantages of reasonable structure, good drainage effect, dual protection against lightning and birds, and safety and reliability.

Claims

1. A lightning protection device for overhead lines in a distribution network, comprising a mounting assembly, an opening and closing drainage assembly and a top discharge assembly, characterized in that: An adjustable bracket is arranged above the mounting assembly, the lower end of the adjustable bracket is mounted on the mounting assembly through a base, a retractable assembly is movably mounted on the upper end of the adjustable bracket, an opening and closing drainage assembly is mounted above the retractable assembly, the retractable assembly is dynamically connected to the opening and closing drainage assembly through a connecting rod mechanism, and is used to drive the opening and closing drainage assembly to realize the opening and closing action; a discharge ball is mounted on the middle part of the inner side of the opening and closing drainage assembly, a top discharge assembly is mounted on the top of the discharge ball, a first discharge gap is formed on the upper part of the top discharge assembly, a second discharge gap is formed between the lower part of the top discharge assembly and the discharge ball, a third discharge gap is formed between the opening and closing drainage assembly and the discharge ball, and the spacing of the third discharge gap is not less than 180 mm.

2. A distribution network overhead line direct lightning diversion protection device as claimed in claim 1, characterized in that: The mounting assembly includes a mounting seat, a fixing plate above the mounting seat, and a plurality of fixing bolts arranged in an array with the center point of the fixing plate being connected to the base; a group of front-to-back symmetrical connecting seats are arranged on both sides of the outer periphery of the mounting seat, and hollow support arms arranged obliquely are installed on the outer sides of the connecting seats, and locking clamps are inserted into the ends of the support arms close to each other, and the locking clamps are connected to the corresponding support arms through hinged rods, and locking bolts are installed at the openings of the locking clamps; a group of springs are arranged on the side of the locking clamps close to the mounting seat, and the free ends of the springs are connected to the inner wall of the support arms through positioning pin seats.

3. A lightning protection device for overhead lines in a distribution network as claimed in claim 2, characterized in that: The base includes a bottom plate connected to a fixed plate, a ball bearing seat is arranged above the bottom plate, a plurality of stable support frames are arranged above the ball bearing seat in a circle, the stable support frames are connected by a plurality of reinforcing ring plates arranged up and down, and the base is connected to the adjustable bracket through the stable support frame.

4. A lightning protection device for overhead lines in a distribution network as claimed in claim 3, characterized in that: The adjustable bracket includes a vertical rod connected to a stable support frame, an L-shaped plate is installed on the top of the vertical rod, and a connecting plate inclined upward is installed on the top of the L-shaped plate. The adjustable bracket is movably connected to the retractable assembly through the connecting plate.

5. A lightning protection device for overhead lines in a distribution network as claimed in claim 4, characterized in that: The retractable assembly includes a base frame, a meshing gear moving device is arranged inside the base frame, rotating handles are installed on the front and rear sides of the meshing gear moving device, a gear rod meshingly connected to the meshing gear moving device is arranged above the base frame, an articulated positioning seat hinged to the connecting plate is arranged above the gear rod, and a top mounting rod connected to the opening and closing drainage assembly is arranged above the articulated positioning seat.

6. A lightning protection device for overhead lines in a distribution network as claimed in claim 5, characterized in that: The base frame of the retractable assembly is connected to the opening and closing drainage assembly through a plurality of connecting rod mechanisms formed in an array with the center of the base frame as the center point, so as to drive the opening and closing action of the opening and closing drainage assembly; the connecting rod mechanism includes a pull rod, the lower end of which is connected to the base frame through a lower U-shaped pull seat, and the upper end of which is connected to the opening and closing drainage assembly through an upper U-shaped pull seat.

7. A lightning protection device for overhead lines in a distribution network as claimed in claim 6, characterized in that: The opening and closing drainage assembly includes a center seat connected to the top mounting rod, and a plurality of inward-retracting plates are evenly arranged on the outer periphery of the center seat. The inner ends of the inward-retracting plates are fixedly connected to the center seat through connecting sections, and reinforcing ribs are installed on the outer surfaces of the inward-retracting plates. The reinforcing ribs extend to one end of the outer side of the connecting section and are connected to the upper U-shaped pull seat; the third discharge gap formed by the inward-retracting plates and the discharge balls after unfolding is not less than 200 mm.

8. A lightning protection device for overhead lines in a distribution network as claimed in claim 7, characterized in that: Slide rails are installed on the inner side surfaces of the inner retracting plates, and a plurality of support frames corresponding to the inner retracting plates are arranged on the outer periphery above the center seat. The support frames are slidably connected to the slide rails through sliders, and the inner upper ends of the inner retracting plates are connected to the support frames through arc rods.

9. A distribution network overhead line direct lightning diversion protection device as claimed in claim 8, characterized in that: The top discharge assembly includes an insulating seat, a mounting column connected to the discharge ball is arranged below the insulating seat, and a plurality of collector orifice plates are installed in a ring array on the outer edge below the insulating seat. A plurality of longitudinally arranged discharge holes are opened on the collector orifice plates, and the second discharge gap formed by the collector orifice plates and the discharge ball has a spacing of not less than 150 mm.

10. A lightning protection device for overhead lines in a distribution network as claimed in claim 9, characterized in that: A conical seat is arranged above the insulating seat, a plurality of collector plates are evenly arranged on the outer periphery of the conical seat, a discharge tip is arranged above the conical seat and is located inside the collector plate, and a first discharge gap spacing formed by the collector plate and the discharge tip is not less than 100 mm.

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