CN216981132U

CN216981132U - Safety lightning arrester

Info

Publication number: CN216981132U
Application number: CN202220358792.XU
Authority: CN
Inventors: 陈锡阳
Original assignee: Shenzhen Dailu Technology Co ltd
Current assignee: Shenzhen Dailu Technology Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-07-15
Anticipated expiration: 2032-02-22

Abstract

The utility model discloses a safety lightning arrester, which is characterized by comprising: the fuse tube comprises an insulating tube body formed by an inner gas generating material layer and an outer protective layer, an arc striking wire penetrates through the insulating tube body and is electrically connected with a first electrode part and a joint part, and the joint part is electrically connected with a tower and enables the fuse tube to be longitudinally arranged and fixed along a lead; the arc striking electrode comprises a clamping part and a second electrode part, and the clamping part is clamped along the longitudinal position of the lead and is electrically connected with the lead, so that the parallel gap distance formed by the second electrode part and the first electrode part is smaller than the insulation distance of the insulator; when lightning breaks through the parallel gap, the lightning current quickly fuses the arc striking line to form an electric arc, the inner layer of the gas production material is burnt by the electric arc to quickly decompose a large amount of gas, and the electric arc is extinguished by longitudinal arc blowing. The utility model can avoid short circuit between lines, has simple and reliable structure, reduces cost, is beneficial to popularization and greatly reduces the lightning trip-out rate of the overhead distribution line.

Description

Safety lightning arrester

Technical Field

The utility model relates to the technical field of lightning protection of high-voltage overhead distribution lines, in particular to a safety lightning arrester.

Background

At present, most of high-voltage distribution lines in China are laid overhead, and are easy to be damaged by lightning and external force in the running process, personal electric shock is frequent, serious loss is caused to national economy, and personal safety is threatened. Insulation of overhead conductors is intended to reduce the risk of external damage and electric shock to human beings, and insulation has been achieved in about one third of high-voltage overhead distribution lines. However, insulated conductors are susceptible to disconnection when struck by lightning.

The lightning arrester can effectively reduce the lightning trip-out rate of the high-voltage overhead distribution line. A large number of distribution lines are provided with lightning arresters, and the following problems are found in the operation: 1. line faults are caused after the gapless lightning arrester is degraded, and fault points are difficult to find; 2. the connecting and adjusting structure of the arrester with the gap is complex due to the changes of the specification length of the insulator and the suspension angle of the wire, and the structure for adjusting the gap is easy to loosen the bolt; 3. the distribution zinc oxide lightning arrester has small heat capacity and is easy to have explosion accidents due to multiple lightning return strokes; 4. it is difficult to perform electrical tests on lightning arresters installed in high altitudes.

The lightning arrester adopting the injection arc extinguishing technology is applied to a high-voltage overhead distribution line, but because the distance between lines is small, such as the distance between 10kV lines is about 1 meter, the injected air flow easily causes the insulation reduction of adjacent wires, and causes short-circuit fault.

In order to ensure safe and reliable power supply of a power grid, a lightning arrester which is higher in safety and reliability, easy to install, convenient to maintain and lower in cost needs to be researched and developed urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a safety arrester, which realizes higher safety and reliability, is easy to install and convenient to maintain and has lower cost.

In order to achieve the above object, the present invention discloses a safety arrester, comprising: the protective tube is an insulating tube body formed by an inner layer of gas production material and an outer protective layer, an arc striking wire penetrates through the insulating tube body and is electrically connected with a first electrode part and a joint part, and the joint part is electrically connected with a tower and enables the protective tube to be longitudinally arranged and fixed along a lead; the arc striking electrode comprises a clamping part and a second electrode part, and the clamping part is clamped along the longitudinal position of the lead and is electrically connected with the lead, so that the parallel gap distance formed by the second electrode part and the first electrode part is smaller than the insulation distance of the insulator; when lightning breaks through the parallel gap, the lightning current quickly fuses the arc striking line to form an electric arc, the inner layer of the gas production material is burnt by the electric arc to quickly decompose a large amount of gas, and the electric arc is extinguished by longitudinally blowing the arc.

Compared with the prior art, the safety lightning arrester has the following beneficial effects: 1. the safety tube of the arrester is longitudinally arranged along the wire, and the high-speed airflow which is ejected from the end part and is rich in charged particles longitudinally moves and diffuses along the phase wire with the lightning stroke fault, so that the short circuit fault of the adjacent phase wire can be avoided, and the arrester with the function of ejection and arc extinction is suitable for an overhead distribution line with a small interphase distance; 2. the position of the arc striking electrode clamping part is adjusted along the longitudinal direction of the lead to realize the adjustment of the parallel gap distance, so that the lightning arrester is simple and reliable in mounting and connecting structure, strong in universality and convenient to mount and maintain; 3. the fuse of arc striking line behind the action of insurance arrester, parallel gap distance increases, and the insurance arrester breaks away from automatically to make the disposable of insurance arrester, the fail safe nature of guarantee product more easily, simultaneously because the span of high-voltage overhead distribution lines only has tens meters usually, when meetting repeated thunderbolt or strike back many times, the insurance arrester of adjacent shaft tower installation can play the protection, avoids the circuit tripping operation.

Preferably, the joint part comprises a pipe joint and a tower joint, the pipe joint is fixedly connected with one end of the insulating pipe body, and the tower joint is fixedly connected with the tower.

Preferably, the pipe joint comprises a plug or a pipe cap which is connected with one end part of the insulating pipe body in a sealing mode.

Preferably, the pipe joint comprises a pipe clamp connected with one end of the insulating pipe body.

Preferably, the pipe clamp is further connected with a pipe cover or a pipe plug, and the pipe cover or the pipe plug is flushed away by high-speed airflow when the safety arrester is actuated.

Preferably, the tower joint comprises a screw hole for fixing to a mounting screw of the insulator, or comprises a steel clip for clamping and fixing to the steel of the tower.

Preferably, the first electrode part comprises an identification part, the shape or color of the identification part is different from that of the insulating tube body, and when the safety arrester acts, the shape or color of the identification part is changed so as to facilitate patrol and discovery.

Preferably, the identification portion includes that a tube cap overlaps seals the insulating body, by the striking line is connected fixedly, 5~50mm of tube cap length, the colour with the insulating body is different, works as when the safety arrester moves, the striking line fusing, the tube cap is washed away by high velocity air, is convenient for tour the discovery.

Preferably, the clamping portion includes at least one metal nail penetrating through the insulation layer of the wire and electrically connected and fixed with the wire.

Preferably, the second electrode part is of a ring structure.

Drawings

FIG. 1 is a cross-sectional view of a single-nozzle fuse in an embodiment of the present invention.

Fig. 2 is a schematic diagram of a dual-nozzle fuse in an embodiment of the utility model.

Fig. 3 is a schematic view of a clamping type arc striking pole according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a puncture-type arc striking electrode in the embodiment of the utility model.

Fig. 5 is a schematic view illustrating the installation of the safety arrester according to the embodiment of the utility model.

Fig. 6 is a schematic view illustrating the installation of the double-circuit line fuse arrester according to the embodiment of the utility model.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

As shown in fig. 1 to 6, the present invention discloses a safety arrester, comprising: the safety tube 21 is characterized in that the safety tube 21 is an insulating tube body 3 consisting of an inner gas production material layer 4 and an outer protective layer, the inner gas production material layer 4 and the outer protective layer are both made of insulating materials, the insulating tube body 3 is an insulator, an arc leading line 5 penetrates through the insulating tube body 3 and is electrically connected with a first electrode part 6 and a joint part 7, and the joint part 7 is electrically connected with a cross arm 11 on a tower 10 and enables the safety tube 21 to be longitudinally arranged and fixed along a lead 14; the arc ignition pole 22 comprises a clamping part 8 and a second electrode part 9, the clamping part 8 is clamped along the longitudinal adjustment position of the lead 14 and is electrically connected, so that the distance of the parallel gap 20 formed by the second electrode part 9 and the first electrode part 6 is smaller than the insulation distance of the insulator 12; when lightning breaks through the parallel gap 20, the lightning current quickly fuses the arc leading line 5 to form an electric arc, the inner layer 4 of the gas generating material is burnt by the electric arc to quickly decompose a large amount of gas, and the electric arc is extinguished by longitudinally blowing the arc.

The distance of the parallel gap 20 is generally equal to 60 to 90%, preferably 70 to 80%, of the insulation distance of the insulator 12, so that the parallel gap breaks down before the insulator when a lightning strike occurs. On different overhead distribution lines, different types of insulators can cause different insulation distances of the insulators, and different heights of wire hanging points of adjacent towers can cause upward or downward inclination of wires, so that the installation arrangement of a parallel gap can be influenced. Meanwhile, the lightning arrester is simple and reliable in mounting and connecting structure, high in universality and convenient to mount and maintain.

As shown in fig. 1, in the first embodiment, the joint portion 7 includes a pipe joint 2 and a tower joint 1, the pipe joint 2 and the tower joint 1 are welded and connected into a whole to form the joint portion 7, the pipe joint 2 includes a plug or a pipe cap seal, and one end of an insulating pipe body 3 is fixedly connected through thread and glue bonding, the tower joint 1 is used for fixedly connecting a tower 10, when the safety arrester 21 acts, high-speed airflow is only sprayed out from one end of a first electrode portion 6, and air is not sprayed out from one end of an insulator 12, so that the tower joint is suitable for a tower with double insulators.

In a second embodiment, shown in fig. 2, the pipe joint 2 comprises one end of a pipe clamp connection insulating pipe body 3. The pipe clamp is also connected with a pipe cover 8, and the pipe cover 8 is flushed away by high-speed airflow when the safety arrester 21 acts. The second embodiment can realize the air injection at the two ends of the protective tube, improves the arc extinguishing capability, can reduce the impact force generated by the instantaneous ejection of high-speed airflow by the air injection in the opposite direction, and is suitable for the tower with a single insulator.

As shown in fig. 1, 2 and 3, the tower fitting 1 includes a screw hole for fixing to a mounting screw 13 of the insulator 12. Alternatively, the tower joint 1 comprises a profile steel clamp (not shown) for clamping and fixing to the profile steel of the tower.

As shown in fig. 1 and 2, first electrode portion 6 is a light aluminium material pipe cover (with first electrode portion mark simultaneously as 6), and the pipe cover 6 is long 5~50mm, and the colour is the aluminum product white, and is different with 3 colours of insulating tube body, is connected fixedly by leading arc line 5, and when insurance arrester 21 moved, the fuse of leading arc line 5, pipe cover 6 was washed away by high velocity air, was convenient for fortune dimension personnel or unmanned aerial vehicle tour and finds.

As shown in fig. 3, the arc ignition electrode 22 includes a clamping portion 8 and a second electrode portion 9, the clamping portion 8 is used for clamping the wire 14, the position is adjusted along the longitudinal direction of the wire 14, the tightening bolt 17 can clamp and electrically connect the wire 14, so that the distance between the second electrode portion 9 and the first electrode portion 6, which forms the parallel gap 20, is smaller than the insulation distance of the insulator 12; in this embodiment, the conductor may be a bare conductor, or an insulated conductor may be stripped of insulation at the clamping location. The clamping part 8 is in an opening state, so that the eddy current generated by the alternating current induction of the lead 14 can be reduced, and the energy loss is caused. The arc starting electrode 22 is made of elastic steel, preferably 316 stainless steel.

As shown in fig. 4, the arc-striking electrode 22 includes a clamping portion 8 and a second electrode portion 9, the clamping portion 8 includes at least one metal nail, and the bolt 17 is tightened to make the metal nail penetrate through the insulation layer of the wire 14 and be electrically connected and fixed with the wire 14.

As shown in fig. 3 and 4, the second electrode portion 9 of the arc starting electrode 22 has a ring-shaped structure and constitutes an electrode end portion. In order to realize the grounding maintenance on the insulated wire, the annular structure of the second electrode part 9 can be enlarged, so that the grounding wire clamp is convenient to clamp, and the use function of the arc striking electrode 22 can be expanded. When the arc starting electrode 22 is used for an insulated wire, the surface may be covered with an insulating silicone rubber layer protection (not shown).

As shown in fig. 6, in the double-circuit overhead distribution line, the distance between the wires of different phases is small, usually less than 1 meter, the fuse tube 21 of the present invention is fixed along the longitudinal direction of the wire 14, the high-speed air jet will flow along the longitudinal direction of the wire, the charged particles will decrease in density during diffusion, gradually neutralize and disappear, and thus the occurrence of discharge caused by the connection of the adjacent wires by the charged particles can be avoided, and arc extinction failure can be avoided.

Fuse 5 fusing of arc starting line after the action of insurance arrester, parallelly connected clearance 20 distance becomes between coupling 2 and the first electrode portion 6 by between second electrode portion 9 and the first electrode portion 6, the distance increases to the insulating distance who is greater than the insulator, the insurance arrester breaks away from automatically, thereby make the disposable of insurance arrester, guarantee the fail safe nature of product more easily, simultaneously because the span of high-voltage overhead distribution line only has tens meters usually, when meetting repeated thunderbolt or strike back many times, the insurance arrester of adjacent shaft tower installation can play the protection, avoid the circuit tripping operation.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.

Claims

1. A fused arrester, comprising:

the protective tube is an insulating tube body formed by an inner layer of gas production material and an outer protective layer, an arc striking wire penetrates through the insulating tube body and is electrically connected with a first electrode part and a joint part, and the joint part is electrically connected with a tower and enables the protective tube to be longitudinally arranged and fixed along a lead;

the arc striking electrode comprises a clamping part and a second electrode part, and the clamping part is clamped along the longitudinal position of the lead and is electrically connected with the lead, so that the parallel gap distance formed by the second electrode part and the first electrode part is smaller than the insulation distance of the insulator;

when lightning breaks through the parallel gap, the lightning current quickly fuses the arc striking line to form an electric arc, the inner layer of the gas production material is burnt by the electric arc to quickly decompose a large amount of gas, and the electric arc is extinguished by longitudinally blowing the arc.

2. A lightning arrester according to claim 1 wherein the joint part comprises a pipe joint and a tower joint, the pipe joint being fixedly connected to one end of the insulating pipe body, the tower joint being fixedly connected to the tower.

3. A lightning arrester according to claim 2 wherein the pipe connector comprises a plug or cap for sealing engagement with an end of the insulating body.

4. A lightning arrester according to claim 2 wherein the pipe connector comprises a pipe clamp connected to an end of the insulating pipe body.

5. A safety arrester according to claim 4, characterized in that the pipe clamp is further connected to a pipe cap or pipe plug which is blown open by the high-velocity air stream when the safety arrester is activated.

6. A lightning arrester according to claim 2 characterized in that the tower head comprises a threaded hole for fastening to a mounting screw of the insulator or a steel clip for clamping to a steel of the tower.

7. A lightning arrester according to claim 1 characterized in that the first electrode part comprises a recognition portion, the recognition portion having a different shape or colour from the insulating tube, and when the lightning arrester is activated, the recognition portion changes shape or colour to facilitate detection.

8. The safety lightning arrester according to claim 7, wherein the identification portion comprises a tube cap covering the insulating tube body and fixed by the arc striking wire, the tube cap is 5-50 mm long and different in color from the insulating tube body, when the safety lightning arrester operates, the arc striking wire is fused, and the tube cap is blown away by high-speed airflow, so that inspection and discovery are facilitated.

9. A lightning arrester according to claim 1 wherein the clamping portion comprises at least one spike penetrating through the insulation of the conductor to provide good electrical connection and retention with the conductor.

10. The lightning arrester of claim 1 wherein the second electrode portion is of annular configuration.