CN213782478U

CN213782478U - Novel lightning protection device for 10kV overhead distribution line

Info

Publication number: CN213782478U
Application number: CN202120110944.XU
Authority: CN
Inventors: 严圣伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2021-07-23
Anticipated expiration: 2031-01-15

Abstract

The utility model discloses a novel lightning protection device for 10kV overhead distribution lines, which comprises two column piles and three insulated wires, wherein the circumferential outer wall of one of the column piles is provided with a first mounting seat, the outer wall of the first mounting seat is provided with a mounting frame, the top outer wall of the mounting frame is provided with three insulators, the outer walls of the three insulators are provided with connecting hardware fittings, and the top outer walls of the three connecting hardware fittings are provided with first protectors; the outer wall of the top of the other column pile is provided with a second mounting seat, and the outer wall of the top of the second mounting seat is provided with three second protectors; the outer wall of the three first protector and the outer wall of the three second protector are provided with insulating jackets, and the inner wall of the three first protector and the inner wall of the three second protector are provided with zinc oxide valve plates. The utility model discloses first protector or second protector are all installed to insulated wire terminal and terminal on two posts, improve lightning protection effect.

Description

Novel lightning protection device for 10kV overhead distribution line

Technical Field

The utility model relates to an electric power facility lightning protection technical field especially relates to a novel lightning protection device of 10kV overhead distribution lines.

Background

At present, in a high-voltage transmission line, a transmission conductor is easy to cause line breakage or tripping accidents due to lightning stroke, the lightning stroke line breakage is a common problem, large-area power failure, loss of electricity sales and personal injury accidents caused by large-scale power failure and insulator flashover of a power line and huge economic loss caused by the large-area power failure and the insulator flashover are caused, the line breakage is mainly caused by the fact that an arc is built on a lightning stroke flashover channel to form power frequency follow current, the temperature of an arc root is high, and the conductor can be blown in a short time. Therefore, it is generally necessary to provide a lightning protection device on the high voltage transmission line to avoid the above situation. At present, 561 distribution lines are in operation in the Baoshan area, for the Lujing, Luo shop, bridge and Liu region on the north side of the Baoshan area, the 10kV distribution overhead line corridor is mostly in an open field, no tall buildings are nearby, the length of the distribution overhead line is generally long, the span is large, and the probability of lightning stroke is very high.

Through the retrieval, chinese patent application No. CN201820667562.5 discloses a novel lightning protection device of 10kV overhead distribution line, lightning protection device places on the distribution line, including last wiring bolt, go up the stainless steel cap, go up the electrode, the silica gel overcoat, the large capacity resistance card, the small capacity resistance card, bottom electrode and lower stainless steel cap, go up wiring bolt and install the top at last stainless steel cap, the silica gel overcoat is in the outside of lightning protection device casing, upper portion is provided with the stainless steel cap in the casing, it is provided with the electrode to go up stainless steel cap lower part, it is provided with the large capacity resistance card to go up the electrode lower part, the small capacity resistance card is installed to the large capacity resistance card lower part, the bottom electrode is installed to the small capacity resistance card lower part. The novel lightning protection device of 10kV overhead distribution line in the patent has the following disadvantages: the lightning protection device is easily influenced by factors such as artificial construction errors, climate change, external force damage and the like, so that the lightning protection effect is not ideal.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, and the novel lightning protection device of 10kV overhead distribution lines who proposes.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a novel lightning protection device for a 10kV overhead distribution line comprises two column piles and three insulated wires, wherein a first mounting seat is arranged on the outer wall of the circumference of one of the column piles, a mounting frame is arranged on the outer wall of the first mounting seat, three insulators are arranged on the outer wall of the top of the mounting frame, connecting hardware fittings are arranged on the outer walls of the three insulators, and first protectors are arranged on the outer walls of the tops of the three connecting hardware fittings; and the outer wall of the top of the other column pile is provided with a second mounting seat, and the outer wall of the top of the second mounting seat is provided with three second protectors.

As a further aspect of the present invention: the outer wall of the first protector and the outer wall of the three second protector are provided with insulating jackets, the inner wall of the three first protector and the inner wall of the three second protector are provided with zinc oxide valve plates, the top inner wall of the three first protector and the top inner wall of the three second protector are provided with upper electrode layers of current-limiting elements, and the bottom inner wall of the three first protector and the bottom inner wall of the three second protector are provided with lower electrode layers of the current-limiting elements.

As a further aspect of the present invention: and one end of each of the three insulators is provided with a cross arm.

As a further aspect of the present invention: the outer wall of three insulator all is provided with the drainage ring, and the other end of three drainage ring all sets up in the top outer wall of three first protector.

As a further aspect of the present invention: the top outer wall of insulator all is provided with the grip slipper, and the inner wall of three grip slipper all is provided with the elastic protection layer, and the bottom inner wall of three grip slipper all is provided with two centre gripping insulation boards.

As a further aspect of the present invention: it is three one side inner wall of grip slipper all is provided with the integration case, and the top inner wall of integration case is provided with the haulage rope, and the top outer wall of three grip slipper all is provided with the buckle, and one side outer wall of two centre gripping insulation boards all is provided with the rope, and the one end of two ropes all sets up in the bottom inner wall of integration case.

As a further aspect of the present invention: the outer walls of the three insulated wires are provided with automatic reclosing assemblies, and the outer walls of the three insulated wires, which are close to two sides of the automatic reclosing assemblies, are provided with blocking blocks.

Compared with the prior art, the utility model provides a novel lightning protection device of 10kV overhead distribution lines possesses following beneficial effect:

1. this novel lightning protection device of 10kV overhead distribution lines, after lightning overvoltage reaches certain amplitude, make the series gap action of first protector and second protector by the overvoltage that lightning current is in the same place, reduce the ground potential difference, make the circuit insulator not take place the flashover, avoid the circuit tripping operation with this, utilize first protector and second protector to avoid the protection operation to insulated wire, first protector or second protector are all installed at insulated wire end and terminal on two posts, improve the lightning protection effect, improve distribution overhead line's power supply reliability.

2. This novel lightning protection device of 10kV overhead distribution lines, when the circuit normal operating, because the existence in clearance makes first protector and second protector not receive the effect of last high frequency operating voltage on the circuit, improve circuit lightning protection effect, after thunder and lightning overvoltage reaches certain amplitude, the series connection clearance is at first moved, first protector and second protector entering operating condition afterwards, the series connection clearance has the effect of keeping apart distribution overhead line insulated conductor, even a certain first protector or second protector break down, the circuit still can normal operating, the reliability of power supply is improved.

3. This novel lightning protection device of 10kV overhead distribution lines arranges insulated wire in the grip slipper, two ropes unite two into one through the integration box and form the haulage rope, tighten up the haulage rope and make the rope drive two centre gripping insulation boards and draw close to middle rotation, make behind the outer wall of the inner wall laminating insulated wire of two centre gripping insulation boards, adjust the length of the fixed haulage rope of buckle, elastic protection layer extrudees the centre gripping insulation board, make it further laminate insulated wire's outer wall, be convenient for install fast and dismantle insulated wire, improve the operating efficiency.

Drawings

Fig. 1 is a schematic side view of a novel lightning protection device for a 10kV overhead distribution line provided by the utility model;

fig. 2 is a schematic view of a top view structure of the novel lightning protection device for a 10kV overhead distribution line provided by the utility model;

fig. 3 is a schematic sectional structure view of a first protector and a second protector of the novel lightning protection device for the 10kV overhead distribution line provided by the utility model;

fig. 4 is the utility model provides a novel lightning protection device's of 10kV overhead distribution lines grip slipper structure schematic diagram.

In the figure: the device comprises a 1-column pile, a 2-insulator, a 3-first protector, a 4-second protector, a 5-second mounting seat, a 6-insulated wire, a 7-automatic reclosing assembly, an 8-connecting hardware fitting, a 9-cross arm, a 10-mounting frame, an 11-first mounting seat, a 12-clamping seat, a 13-blocking slider, a 14-diversion ring, a 15-zinc oxide valve plate, a 16-lower electrode layer of a current-limiting element, a 17-insulating jacket, an 18-upper electrode layer of the current-limiting element, a 19-elastic protective layer, a 20-clamping insulating plate, a 21-integration box, a 22-traction rope and a 23-buckle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

A novel lightning protection device for a 10kV overhead distribution line comprises two column piles 1 and three insulated wires 6, wherein a first mounting seat 11 is fixed on the outer wall of the circumference of one column pile 1 through bolts, a mounting frame 10 is fixed on the outer wall of the first mounting seat 11 through bolts, three insulators 2 are fixed on the outer wall of the top of the mounting frame 10 through bolts, connecting hardware fittings 8 are welded on the outer walls of the three insulators 2, and first protectors 3 are fixed on the outer walls of the tops of the three connecting hardware fittings 8 through bolts; a second mounting seat 5 is fixed on the outer wall of the top of the other column pile 1 through bolts, and three second protectors 4 are fixed on the outer wall of the top of the second mounting seat 5 through bolts; first protector 3 and second protector 4 are the area series gap, after lightning overvoltage reaches certain amplitude, make the series gap action of first protector 3 and second protector 4 by the overvoltage that lightning current is in the same place, reduce the status difference, make circuit insulator 2 not take place the flashover, with this avoid the circuit tripping operation, utilize first protector 3 and second protector 4 to avoid the protection operation to insulated wire 6, first protector 3 or second protector 4 are all installed to 6 ends of insulated wire and terminal on two posts 1, improve the lightning protection effect, improve distribution overhead line's power supply reliability.

In order to improve the power supply reliability of the distribution overhead line, as shown in fig. 3, the outer walls of the three first protectors 3 and the outer walls of the three second protectors 4 are all wrapped by insulating outer sleeves 17, the inner walls of the three first protectors 3 and the inner walls of the three second protectors 4 are all fixed with zinc oxide valve plates 15 through screws, the top inner walls of the three first protectors 3 and the top inner walls of the three second protectors 4 are all fixed with upper electrode layers 18 of current limiting elements through bolts, the bottom inner walls of the three first protectors 3 and the bottom inner walls of the three second protectors 4 are all fixed with lower electrode layers 16 of current limiting elements through bolts, one ends of the three insulators 2 are all connected with cross arms 9 through threads, the outer walls of the three insulators 2 are all fixed with current guiding rings 14 through bolts, the other ends of the three current guiding rings 14 are all fixed with the top outer walls of the three first protectors 3 through bolts, the upper electrode layer 18 of the current-limiting element, the lower electrode layer 16 of the current-limiting element and the zinc oxide valve plate 15 are of a series gap structure, when a line normally runs, the first protector 3 and the second protector 4 are not affected by continuous high-frequency working voltage on the line due to the existence of gaps, the first protector 3 and the insulator 2 are connected through the current-guiding ring 14, when lightning overvoltage reaches a certain amplitude value in use, the series gap firstly acts, then the first protector 3 and the second protector 4 enter a working state, the insulation level of the insulation outer sleeve 17 can be lower than that of a gapless arrester, the series gap has the effect of isolating the insulated conducting wire 6 of the power distribution overhead line, even if one first protector 3 or one second protector 4 breaks down, the line can still normally run, and the reliability of power supply is improved.

In order to facilitate the rapid installation and disassembly of the insulated conductor 6, as shown in fig. 2 and 4, the top outer walls of the three insulators 2 are all fixed with clamping seats 12 through bolts, the inner walls of the three clamping seats 12 are all welded with elastic protection layers 19, the bottom inner walls of the three clamping seats 12 are all rotatably connected with two clamping insulation plates 20 through rotating shafts, one side inner walls of the three clamping seats 12 are all fixed with an integration box 21 through bolts, a traction rope 22 is inserted through the top inner wall of the integration box 21, the top outer walls of the three clamping seats 12 are all fixed with buckles 23 through bolts, one side outer walls of the two clamping insulation plates 20 are all welded with ropes, one ends of the two ropes are inserted into the bottom inner wall of the integration box 21, during installation, the insulated conductor 6 is placed in the clamping seats 12, the two ropes are combined into one through the integration box 21 to form the traction rope 22, the traction rope 22 is tightened to drive the two clamping insulation plates 20 to rotate towards the middle, make behind the outer wall of the inner wall laminating insulated wire 6 of two centre gripping insulation boards 20, adjust the length of the fixed haulage rope 22 of buckle 23, elastic protection layer 19 extrudes the centre gripping insulation board 20, makes it further laminate insulated wire 6's outer wall, is convenient for install fast and dismantle insulated wire 6, improves the operating efficiency.

In order to ensure the normal power supply of the line, as shown in fig. 1 and fig. 2, the outer walls of three insulated wires 6 are all fixed with an automatic reclosing assembly 7 through bolts, the outer walls of the three insulated wires 6 close to the two sides of the automatic reclosing assembly 7 are all sleeved with a blocking block 13, the blocking block 13 limits the position of the automatic reclosing assembly 7, when the distribution overhead line is struck by lightning, and when the lightning overvoltage causes an insulated flashover to the line insulator 2 to form a ground fault current, the automatic reclosing assembly 7 can rapidly cut off the fault current, so that the normal power supply of the line is ensured.

The working principle is as follows: when the device is installed, the insulated wire 6 is arranged in the clamping seat 12, the two ropes are combined into a whole through the integration box 21 to form the traction rope 22, the traction rope 22 is tightened to enable the ropes to drive the two clamping insulation plates 20 to rotate towards the middle, after the inner walls of the two clamping insulation plates 20 are attached to the outer wall of the insulated wire 6, the length of the traction rope 22 is fixed through the adjusting buckle 23, the clamping insulation plates 20 are extruded through the elastic protection layer 19 to be further attached to the outer wall of the insulated wire 6, the upper electrode layer 18 of the current limiting element, the lower electrode layer 16 of the current limiting element and the zinc oxide valve plate 15 are of a series gap structure, the first protector 3 and the second protector 4 are both provided with series gaps, the first protector 3 and the second protector 4 are not affected by continuous high-frequency working voltage on a line due to the existence of the gaps, the first protector 3 and the insulator 2 are connected through the current guiding ring 14, when the lightning overvoltage reaches a certain amplitude, the series gap acts firstly, then the first protector 3 and the second protector 4 enter a working state, so that the insulation level of the insulation outer sleeve 17 can be lower than that of a gapless lightning arrester, the series gap has the function of isolating the insulated conductor 6 of the power distribution overhead line, even if a certain first protector 3 or second protector 4 breaks down, the line can still run normally, when the lightning overvoltage reaches a certain amplitude, the series gap between the first protector 3 and the second protector 4 acts by the overvoltage of lightning current together, the status difference is reduced, the line insulator 2 does not generate flashover, so that the line is prevented from tripping, the first protector 3 and the second protector 4 are utilized to prevent the insulated conductor 6 from being protected, the first protector 3 or the second protector 4 is arranged at the tail end and the terminal of the insulated conductor 6 on the two piles 1, the lightning protection effect is improved, the power supply reliability of the power distribution overhead line is improved, when the power distribution overhead line is struck by lightning and the lightning overvoltage causes insulation flashover to the line insulator 2 to form ground fault current, the automatic reclosing assembly 7 can rapidly cut off the fault current, and the normal power supply of the line is ensured.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A novel lightning protection device for a 10kV overhead distribution line comprises two column piles (1) and three insulated wires (6), and is characterized in that a first mounting seat (11) is arranged on the outer wall of the circumference of one of the column piles (1), a mounting frame (10) is arranged on the outer wall of the first mounting seat (11), three insulators (2) are arranged on the outer wall of the top of the mounting frame (10), connecting hardware fittings (8) are arranged on the outer walls of the three insulators (2), and first protectors (3) are arranged on the outer walls of the tops of the three connecting hardware fittings (8); and the outer wall of the top of the other column pile (1) is provided with a second mounting seat (5), and the outer wall of the top of the second mounting seat (5) is provided with three second protectors (4).

2. The novel lightning protection device for the 10kV overhead distribution line according to claim 1, wherein the outer walls of the three first protectors (3) and the outer walls of the three second protectors (4) are provided with insulating outer sleeves (17), the inner walls of the three first protectors (3) and the inner walls of the three second protectors (4) are provided with zinc oxide valve plates (15), the top inner walls of the three first protectors (3) and the top inner walls of the three second protectors (4) are provided with upper electrode layers (18) of current limiting elements, and the bottom inner walls of the three first protectors (3) and the bottom inner walls of the three second protectors (4) are provided with lower electrode layers (16) of the current limiting elements.

3. The novel lightning protection device for the 10kV overhead distribution line according to claim 2, wherein a cross arm (9) is arranged at one end of each of the three insulators (2).

4. The novel lightning protection device for the 10kV overhead distribution line according to claim 3, wherein the outer walls of the three insulators (2) are provided with the drainage rings (14), and the other ends of the three drainage rings (14) are arranged on the top outer walls of the three first protectors (3).

5. The novel lightning protection device for the 10kV overhead distribution line according to claim 4, wherein the outer walls of the tops of the three insulators (2) are provided with the clamping seats (12), the inner walls of the three clamping seats (12) are provided with the elastic protection layer (19), and the inner walls of the bottoms of the three clamping seats (12) are provided with the two clamping insulation plates (20).

6. The novel lightning protection device for the 10kV overhead distribution line according to claim 5, wherein an integration box (21) is arranged on each of the inner walls of three clamping seats (12), a traction rope (22) is arranged on the inner wall of the top of the integration box (21), buckles (23) are arranged on the outer walls of the tops of three clamping seats (12), ropes are arranged on the outer walls of one sides of two clamping insulation plates (20), and one ends of the two ropes are arranged on the inner wall of the bottom of the integration box (21).

7. The novel lightning protection device for the 10kV overhead distribution line according to any one of claims 1 to 6, wherein the outer walls of the three insulated wires (6) are provided with automatic reclosing assemblies (7), and the outer walls of the three insulated wires (6) close to two sides of each automatic reclosing assembly (7) are provided with blocking blocks (13).