An insurance arrester

Abstract

The application discloses an insurance lightning arrester, characterized in that comprising: an insurance tube, which is composed of a gas production material inner layer and a protective outer layer to form an insulation tube body, an arc leading wire penetrating through the insulation tube body to electrically connect a first electrode part and a joint part, the joint part being electrically connected with a tower and enabling the insurance tube to be longitudinally arranged and fixed along a conductor; and an arc leading electrode, which comprises a clamping part and a second electrode part, the clamping part being longitudinally adjusted and clamped to be electrically connected, so that the second electrode part and the first electrode part form a parallel gap distance smaller than an insulation distance of an insulator; when lightning breaks through the parallel gap, lightning current rapidly fuses the arc leading wire to form an arc, the gas production material inner layer is rapidly decomposed into a large amount of gas under the arc burning, and the arc is longitudinally blown out to extinguish the arc. The application can avoid line-to-line short circuit, has simple and reliable structure, reduces cost, is beneficial to promotion, and greatly reduces a lightning trip-out rate of an overhead distribution line.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lightning protection of high-voltage overhead distribution lines, and particularly relates to an insurance arrester. BACKGROUND

[0002] At present, most of the high-voltage distribution lines in China are overhead laid, and are prone to lightning strikes and external damage failures during operation, and personal electric shock also occurs frequently, which causes serious losses to the national economy and threatens personal safety. Overhead conductor insulation can reduce the risk of external damage and personal electric shock, and about one-third of the high-voltage overhead distribution lines have been insulated. However, the insulated conductors are prone to wire breakage accidents when subjected to lightning strikes.

[0003] The installation of arresters can effectively reduce the lightning trip-out rate of high-voltage overhead distribution lines. A large number of distribution lines are installed with arresters, and the following problems are found in operation: 1. The deterioration of the non-gap arrester causes line failure, and the fault point is difficult to find; 2. The connection and adjustment structure of the gap arrester is complex due to the change of insulator size and length and the suspension angle of the conductor, and the structure for adjusting the gap is prone to bolt loosening; 3. The thermal capacity of the distribution zinc oxide arrester is small, and it is prone to explosion accidents after being subjected to multiple lightning strokes; 4. The arrester installed in the high altitude is difficult to carry out electrical tests.

[0004] The arrester using the spray arc extinguishing technology is started to be applied to high-voltage overhead distribution lines, but due to the small line-to-line distance, such as about 1 meter for 10kV line-to-line distance, the sprayed airflow is easy to cause the reduction of the insulation of adjacent conductors, resulting in short-circuit failure.

[0005] In order to ensure the safe and reliable power supply of the power grid, it is urgent to develop an arrester with higher safety and reliability, easy to install, easy to maintain, and low cost. SUMMARY

[0006] The purpose of the present application is to provide an insurance arrester with higher safety and reliability, easy to install, easy to maintain, and low cost.

[0007] In order to achieve the above object, the application discloses an insurance lightning arrester, comprising: an insurance tube composed of a gas generating material inner layer and a protective outer layer, an arc striking wire penetrating through the insulation tube to electrically connect a first electrode part and a joint part, the joint part electrically connecting a tower and enabling the insurance tube to be fixed along the longitudinal direction of a conductor; an arc striking electrode comprising a clamping part and a second electrode part, the clamping part being clamped and electrically connected in position along the longitudinal direction of the conductor, so that the second electrode part and the first electrode part form a parallel gap distance smaller than the insulation distance of an insulator; when lightning strikes through the parallel gap, lightning current rapidly melts the arc striking wire to form an arc, and the gas generating material inner layer rapidly decomposes a large amount of gas under the heat of the arc, and the arc is blown out longitudinally.

[0008] Compared with the prior art, the insurance lightning arrester has the following beneficial effects: 1. The insurance tube of the lightning arrester is installed along the longitudinal direction of the conductor, and the high-speed gas flow rich in charged particles ejected from the end part moves and diffuses along the longitudinal direction of the lightning failure phase conductor, so that short circuit failure of the adjacent phase conductor can be avoided, and the ejection arc extinguishing lightning arrester is suitable for overhead distribution lines with small phase-to-phase distance; 2. The clamping part of the arc striking electrode is adjusted in position along the longitudinal direction of the conductor to adjust the parallel gap distance, so that the lightning arrester has simple and reliable installation and connection structure, strong universality, and is convenient to install and maintain; 3. After the insurance lightning arrester operates, the arc striking wire is melted, the parallel gap distance is increased, and the insurance lightning arrester is automatically separated, so that the insurance lightning arrester is used once, and the safety and reliability of the product are more easily ensured. At the same time, since the span of the high-voltage overhead distribution line is usually only a few tens of meters, when repeated lightning strikes or multiple return strokes occur, the insurance lightning arrester installed on the adjacent tower can be protected to avoid line tripping.

[0009] Preferably, the joint part comprises a tube joint and a tower joint, the tube joint fixedly connecting one end of the insulation tube, and the tower joint fixedly connecting the tower.

[0010] Preferably, the tube joint comprises a plug or a tube cap sealingly connected to one end of the insulation tube.

[0011] Preferably, the tube joint comprises a tube clamp connected to one end of the insulation tube.

[0012] Preferably, the tube clamp further connects a tube cover or a tube plug, which is broken by the high-speed gas flow when the insurance lightning arrester operates.

[0013] Preferably, the tower joint comprises a threaded hole for fixing a mounting screw of the insulator, or comprises a section steel clamp for clamping a section steel fixed to the tower.

[0014] Preferably, the first electrode part comprises an identification part, which has a shape or color different from the insulating tube body, and the shape or color of the identification part changes when the safety lightning arrester operates, so as to facilitate the patrol discovery.

[0015] Preferably, the identification part comprises a tube cover, which covers the insulating tube body and is connected and fixed by the arc leading wire, the tube cover is 5-50 mm long and has a color different from the insulating tube body, when the safety lightning arrester operates, the arc leading wire is fused, the tube cover is blown off by high-speed airflow, and the patrol discovery is facilitated.

[0016] Preferably, the clamping part comprises at least one metal nail, which penetrates the insulating layer of the wire, is well electrically connected with the wire, and is fixed.

[0017] Preferably, the second electrode part has a ring structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a sectional view of a single-jet safety tube in the embodiment of the present application.

[0019] Figure 2 It is a schematic view of a double-jet safety tube in the embodiment of the present application.

[0020] Figure 3 It is a schematic view of a clamping type arc leading electrode structure in the embodiment of the present application.

[0021] Figure 4 It is a schematic view of a puncture type arc leading electrode structure in the embodiment of the present application.

[0022] Figure 5 It is a schematic view of a safety lightning arrester installation in the embodiment of the present application.

[0023] Figure 6 It is a schematic view of a double-loop line safety lightning arrester installation in the embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the technical content, structural features, achieved purposes and effects of the present application clear, the following will be described in detail in combination with the embodiments and the accompanying drawings.

[0025] As Figures 1 to 6As shown, the present application discloses a kind of insurance lightning arresters, comprising: safety tube 21, safety tube 21 is by gas generating material inner layer 4 and protective outer layer constitute insulating tube 3, gas generating material inner layer 4 and protective outer layer are all insulating material, insulating tube 3 is insulator, one arc line 5 is electrically connected first electrode part 6 and connector part 7 through insulating tube 3, connector part 7 is electrically connected cross arm 11 on pole tower 10 and makes safety tube 21 be longitudinally installed and fixed along wire 14;Arcing electrode 22, arcing electrode 22 includes clamping part 8 and second electrode part 9, clamping part 8 is longitudinally adjusted position clamping and electrically connected, so that second electrode part 9 and first electrode part 6 constitute parallel gap 20 distance is less than the insulation distance of insulator 12;When lightning breaks parallel gap 20, lightning current rapidly fuses arcing wire 5 and forms arc, gas generating material inner layer 4 is rapidly decomposed by arc burning and a large amount of gas, longitudinal arc blowout extinguishes arc.

[0026] Parallel gap 20 distance is usually equivalent to 60~90% of the insulation distance of insulator 12, preferably 70~80%, to realize when encountering lightning, parallel gap is preferentially broken down than insulator.In different overhead distribution lines, the selection of insulator will lead to different insulation distances of insulator, the height of adjacent pole tower wire hanging point will lead to wire upward or downward inclination, all of which will affect the installation setting of parallel gap, the advantage of the present application is to realize the adjustment of parallel gap 20 by adjusting the installation position of arcing electrode 22 on wire, to ensure its number in the preferred position.Meanwhile, it also realizes that the installation connection structure of lightning arrester is simple and reliable, has strong universality, is convenient to install and maintain.

[0027] As shown in the first embodiment, Figure 1 Connector part 7 includes pipe joint 2 and tower joint 1, pipe joint 2 and tower joint 1 are welded into one and constitute connector part 7, pipe joint 2 includes plug or pipe cap, is fixedly connected and sealed through thread and glue bonding one end of insulating tube 3, tower joint 1 is used for fixedly connecting pole tower 10, high-speed airflow is only sprayed out at one end of first electrode part 6 when insurance lightning arrester 21 acts, and gas is not sprayed at one end of insulator 12, which is suitable for pole tower with double support insulator.

[0028] As shown in the second embodiment, Figure 2 Pipe joint 2 includes pipe clamp connecting one end of insulating tube 3. Pipe clamp also connects a pipe cover 18, which is blown open by high-speed airflow when insurance lightning arrester 21 acts. The second embodiment can realize gas spraying at both ends of safety tube, improve arc extinguishing capacity, and the opposite direction of gas spraying can reduce the impact force generated by high-speed airflow instantaneously sprayed out, which is suitable for pole tower with single support insulator.

[0029] As shown in the third embodiment, Figure 1 , 2As shown in FIGS. 1 and 3, the tower joint 1 includes a threaded hole for fixing the mounting screw 13 of the insulator 12. Alternatively, the tower joint 1 includes a steel clamp (not shown) for clamping a steel bar fixed to the tower.

[0030] As shown in FIGS. 1 and 3, the tower joint 1 includes a threaded hole for fixing the mounting screw 13 of the insulator 12. Alternatively, the tower joint 1 includes a steel clamp (not shown) for clamping a steel bar fixed to the tower. Figure 1 、 2 As shown in FIGS. 1 and 3, the tower joint 1 includes a threaded hole for fixing the mounting screw 13 of the insulator 12. Alternatively, the tower joint 1 includes a steel clamp (not shown) for clamping a steel bar fixed to the tower.

[0031] As shown in FIGS. 1 and 3, the tower joint 1 includes a threaded hole for fixing the mounting screw 13 of the insulator 12. Alternatively, the tower joint 1 includes a steel clamp (not shown) for clamping a steel bar fixed to the tower. Figure 3 As shown in FIGS. 1 and 3, the tower joint 1 includes a threaded hole for fixing the mounting screw 13 of the insulator 12. Alternatively, the tower joint 1 includes a steel clamp (not shown) for clamping a steel bar fixed to the tower.

[0032] As shown in FIGS. 1 and 3, the tower joint 1 includes a threaded hole for fixing the mounting screw 13 of the insulator 12. Alternatively, the tower joint 1 includes a steel clamp (not shown) for clamping a steel bar fixed to the tower. Figure 4 As shown in FIGS. 1 and 3, the tower joint 1 includes a threaded hole for fixing the mounting screw 13 of the insulator 12. Alternatively, the tower joint 1 includes a steel clamp (not shown) for clamping a steel bar fixed to the tower.

[0033] As shown in FIGS. 1 and 3, the tower joint 1 includes a threaded hole for fixing the mounting screw 13 of the insulator 12. Alternatively, the tower joint 1 includes a steel clamp (not shown) for clamping a steel bar fixed to the tower. Figure 3 、 4 As shown in FIGS. 1 and 3, the tower joint 1 includes a threaded hole for fixing the mounting screw 13 of the insulator 12. Alternatively, the tower joint 1 includes a steel clamp (not shown) for clamping a steel bar fixed to the tower.

[0034] As shown in FIGS. 1 and 3, the tower joint 1 includes a threaded hole for fixing the mounting screw 13 of the insulator 12. Alternatively, the tower joint 1 includes a steel clamp (not shown) for clamping a steel bar fixed to the tower. Figure 6 As shown in FIGS. 1 and 3, the tower joint 1 includes a threaded hole for fixing the mounting screw 13 of the insulator 12. Alternatively, the tower joint 1 includes a steel clamp (not shown) for clamping a steel bar fixed to the tower.

[0035] The arcing wire 5 of the insurance arrester is fused after action, the distance of the parallel gap 20 is changed from between the second electrode part 9 and the first electrode part 6 to between the pipe joint 2 and the first electrode part 6, the distance is increased to be greater than the insulation distance of the insulator, the insurance arrester is automatically disconnected, so that the insurance arrester is used once, and the safety and reliability of the product are more easily ensured, and meanwhile, since the span of the high-voltage overhead distribution line is usually only dozens of meters, when repeated lightning strokes or multiple return strokes are encountered, the insurance arrester installed on the adjacent tower can be protected, and line tripping is avoided.

[0036] The above only discloses preferred embodiments of the present application, and of course cannot limit the scope of the patent right of the present application, so equivalent changes made in the patent application scope of the present application still belong to the scope covered by the present application.

Claims

1. An insurance arrester, characterized by, The application relates to an arc-extinguishing device for lightning protection, which comprises the following parts: an insulating tube composed of an inner layer of gas-generating material and an outer layer of protective material, an arc-inducing wire penetrating through the insulating tube to electrically connect a first electrode part and a joint part, the joint part being electrically connected to a tower and enabling the arc-extinguishing device to be fixed along the wire in the longitudinal direction; an arc-inducing electrode comprising a clamping part and a second electrode part, the clamping part being adjusted in position along the wire in the longitudinal direction to be clamped and electrically connected, so that the second electrode part and the first electrode part form a parallel gap with a gap distance smaller than the insulating distance of an insulator; when lightning strikes the parallel gap, lightning current rapidly melts the arc-inducing wire to form an arc, the inner layer of gas-generating material is rapidly decomposed into a large amount of gas under the heat of the arc, and the arc is blown out in the longitudinal direction.

2. An arcing horn according to claim 1, wherein the joint part comprises a tube joint and a tower joint, the tube joint being fixedly connected to one end of the insulating tube, and the tower joint being fixedly connected to the tower.

3. An arcing horn according to claim 2, wherein the tube joint comprises a plug or a tube cap to be sealingly connected to one end of the insulating tube.

4. An arcing horn according to claim 2, wherein the tube joint comprises a tube clamp to be connected to one end of the insulating tube.

5. An arcing horn according to claim 4, wherein the tube clamp is further connected to a tube cover or a tube plug, which is blown open by high-speed airflow when the arc-extinguishing device operates.

6. An arcing horn according to claim 2, wherein the tower joint comprises a screw hole for a mounting screw of the insulator or a steel clamp for clamping a steel of the tower.

7. An insurance arrester according to claim 1, characterized in that the first electrode part comprises an identification part, the shape or color of the identification part being different from that of the insulating tube, and the shape or color of the identification part changes when the arc-extinguishing device operates, so as to facilitate the discovery of the arc-extinguishing device.

8. An arcing horn according to claim 7, wherein the identification part comprises a tube cover to be sealingly connected to the insulating tube and to be fixed by the arc-inducing wire, the tube cover being 5-50 mm long and having a color different from that of the insulating tube, the arc-inducing wire being melted when the arc-extinguishing device operates, and the tube cover being blown open by high-speed airflow, so as to facilitate the discovery of the arc-extinguishing device.

9. An insurance arrester according to claim 1, characterized in that the clamping part comprises at least one spike to penetrate through the insulating layer of the wire and to be electrically connected to and fixed to the wire.

10. An arcing horn according to claim 1, wherein the second electrode part has a ring structure.

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