CN111834069A - Semi-closed double-jet airflow arc-extinguishing insulator - Google Patents

Semi-closed double-jet airflow arc-extinguishing insulator Download PDF

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Publication number
CN111834069A
CN111834069A CN201910305837.XA CN201910305837A CN111834069A CN 111834069 A CN111834069 A CN 111834069A CN 201910305837 A CN201910305837 A CN 201910305837A CN 111834069 A CN111834069 A CN 111834069A
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China
Prior art keywords
jet
main body
insulator
insulator main
airflow
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Pending
Application number
CN201910305837.XA
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Chinese (zh)
Inventor
王巨丰
王嬿蕾
张清河
彭斐
杨倩颖
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Individual
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Individual
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Priority to CN201910305837.XA priority Critical patent/CN111834069A/en
Publication of CN111834069A publication Critical patent/CN111834069A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
    • H01B17/46—Means for providing an external arc-discharge path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
    • H01B17/48—Means for obtaining improved distribution of voltage; Protection against arc discharges over chains or other serially-arranged insulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/02—Means for extinguishing arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/02—Means for extinguishing arc
    • H01T1/08—Means for extinguishing arc using flow of arc-extinguishing fluid

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)

Abstract

The invention discloses a semi-closed double-jet airflow arc extinguishing insulator, which comprises an insulator main body, an upper electrode and a lower electrode, wherein the insulator main body is provided with a plurality of air holes; the interior of the insulator main body is of a hollow structure, and a partition plate is longitudinally arranged in the middle of the interior of the insulator main body and divides the interior space of the insulator main body into two groups of air flow spraying channels; the upper end of the left air jet channel is fixedly provided with an air jet assembly, and the lower end of the left air jet channel is provided with an air jet nozzle extending to the side surface of the insulator main body; the upper end of the right jet airflow channel is provided with an airflow jet which extends to the side face of the insulator main body, and the lower end of the right jet airflow channel is fixedly provided with a jet airflow component. The invention can restrict and control the arc path, eliminate the harm of arc drift, has wide application range, one-time installation, long-term reuse, low operation cost and high sensitivity, and is beneficial to the safe production of electric power.

Description

Semi-closed double-jet airflow arc-extinguishing insulator
Technical Field
The invention belongs to a lightning protection device for a power transmission and distribution overhead line, and relates to a semi-closed double-injection airflow arc extinguishing insulator.
Background
The insulator is a special insulating control and can play an important role in an overhead transmission line. Early-age insulators are mostly used for telegraph poles, and a plurality of disc-shaped insulators are hung at one end of a high-voltage wire connecting tower which is gradually developed, are used for increasing creepage distance and are usually made of glass or ceramics. The insulator should not fail due to various electromechanical stresses caused by changes in environmental and electrical loading conditions, otherwise the insulator will not function significantly and will compromise the service and operational life of the entire line.
The main function of the insulator is to achieve electrical insulation and mechanical fixation, for which various electrical and mechanical properties are specified. The method aims at the aspects of development, process, materials, test method, aging problem, mechanical property, brittle failure problem, umbrella group digging, high altitude problem and the like of the composite insulator, wherein the aging problem seriously affects the lightning resistance level of a power transmission line, and the insulator generates flashover and generates single-phase short circuit fault to cause a trip accident under the serious condition.
Disclosure of Invention
The invention aims to provide a semi-closed double-jet airflow arc extinguishing insulator aiming at the defects in the prior art. The device has good effectiveness and durability.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a semi-enclosed double-jet airflow arc extinguishing insulator comprises an insulator main body, an upper electrode and a lower electrode, wherein the insulator main body is fixedly arranged on a cross arm or an overhead conductor through a connecting hardware fitting; the inner part of the insulator main body is of a hollow structure, a partition plate is longitudinally arranged in the middle of the inner part of the insulator main body and divides the inner space of the insulator main body into two groups of air jet channels, and a wall electrode is arranged on the partition plate; the upper end of the left air injection channel is fixedly provided with an air injection assembly, and the lower end of the air injection assembly is an air injection nozzle which vertically extends downwards or extends towards the side surface of the insulator main body; the upper end of the right jet airflow channel is provided with an airflow jet which extends to the side surface of the insulator main body, and the lower end of the right jet airflow channel is fixedly provided with a jet airflow component; the air jet assembly at the upper end of the insulator main body is electrically connected with the upper electrode, and the air jet assembly at the lower end of the insulator main body is electrically connected with the lower electrode.
The invention further discloses that the jet airflow component mainly comprises a jet cylinder and a gas generator; the jet cylinder is embedded on the inner wall of the end part of the jet airflow channel, one end of the jet cylinder is fixedly connected with the gas generator, and the opening of the other end of the jet cylinder is communicated with the jet airflow channel; the gas generator is fixedly arranged at the end part of the jet gas flow channel, so that the inner space of the insulator main body forms two groups of semi-closed structures, and the arc striking electrodes are arranged on the gas generator.
The arc striking electrode is made of metal or nonmetal with strong conductivity and can guide electric arc to enter the jet airflow channel; the injection cylinder is made of a high-strength and strong-pressure-resistant non-conductive metal material; arc extinguishing gas pills triggered by induction current are arranged in the gas generator. The gas generator in the invention can adopt the gas generator in the solid-phase arc-extinguishing lightning-protection device series which is the invented result previously applied by the inventor, and can also adopt the existing gas generator products which use the power transmission line to prevent lightning and extinguish arcs in the market, and the like.
The invention further discloses that an arc guide ring is arranged at the opening of the injection cylinder. The arc guiding ring is made of metal or nonmetal with strong conductivity, and is matched with the wall electrode to guide the arc to rotate to the jet airflow channel on the other side.
The invention further discloses that the outer surface of the insulator main body is provided with a skirt edge. The skirt edge is arranged to enhance creepage distance and avoid electric arc creeping discharge.
The invention further discloses that the wall electrode adopts an arc guide electrode plate or a compression arc extinguishing tube or a recoil tube. The wall electrode can effectively disperse the arc energy, so that the arc can be extinguished more easily.
The invention further discloses that the opening of the airflow nozzle extending to the side surface of the insulator main body is inclined downwards. The downward opening airflow spout can effectively prevent rain water or dust from entering the inside of the air jet flow channel.
The working principle of the invention is as follows:
the invention is arranged on a transmission line, and electric arcs generated when the tower or the lightning conductor is struck by lightning are led into the interior of the insulator string, so that flashover on the outer surface of the insulator string is avoided; the electric arc can be drawn into the insulator string through the upper electrode or the lower electrode, the current flowing in the upper/lower electrode triggers an induction power supply of the gas generator to generate induction current, the induction current further triggers an arc extinguishing gas pill to act, high-speed high-voltage gas is generated to act on the electric arc, and most of the electric arc is destroyed due to the action of the jet airflow generator. The rest electric arc enters the jet airflow channel at the other side along the wall electrode, an arc guide ring is arranged at the jet cylinder hole of the jet airflow generating assembly, the rest electric arc enters the jet airflow assembly in the jet airflow channel at the other side under the action of the arc guide ring and the wall electrode, the circulating electric arc current triggers an induction power supply of the gas generator to generate an induction current, the induction current further triggers an arc extinguishing gas pill to act, high-speed high-pressure gas is generated to act on the rest electric arc, and the electric arc is completely extinguished.
The invention has the advantages and beneficial effects as follows:
1. the invention can restrict and control the arc path, and the arc can be introduced into the arc extinguishing channel, thereby eliminating the harm of arc drift and improving the safety performance.
2. The invention can directly replace the insulator string on the transmission line, not only has the original insulation function, but also has the lightning protection and arc extinguishing functions, has wide application range, and is not influenced by the arrangement of the conducting wire, the tower type and the polar effect
3. The lightning protection device effectively prevents the problem of flashover of the lightning protection device, reduces the lightning trip-out rate of power equipment, protects power facilities, improves the reliability of a power grid, and is favorable for power safety production.
Drawings
Fig. 1 is a schematic view of the overall internal structure of an embodiment of the present invention.
FIG. 2 is a schematic view of the jet assembly of the present invention.
Fig. 3 is a schematic view of the installation of the present invention.
Fig. 4 is a schematic view of the overall internal structure of another embodiment of the present invention.
Fig. 5 is a schematic view of the overall internal structure of another embodiment of the present invention.
Fig. 6 is a schematic view of the overall internal structure of another embodiment of the present invention.
Sequence numbers and corresponding names in the figures:
2-upper electrode, 3-lower electrode, 4-insulator main body, 5-jet airflow component, 6-airflow nozzle, 7-wall electrode, 8-clapboard, 9-jet airflow channel, 10-skirt edge, 11-arc guide ring, 12-jet cylinder, and 13-gas generator.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
example 1:
as shown in fig. 1 and 3, a semi-enclosed double-jet air current arc extinguishing insulator comprises an insulator main body 4, an upper electrode 2 and a lower electrode 3, wherein the insulator main body is fixedly arranged on a cross arm or an overhead conductor through a connecting hardware fitting; the interior of the insulator main body 4 is of a hollow structure, a partition plate 8 is longitudinally arranged in the middle of the interior of the insulator main body, the partition plate 8 divides the interior space of the insulator main body 4 into two groups of air jet channels 9, and a wall electrode 7 is arranged on the partition plate 8; the upper end of the left air jet channel is fixedly provided with an air jet assembly, and the lower end of the left air jet channel is provided with an air jet nozzle extending to the side surface of the insulator main body; the upper end of the right jet airflow channel is provided with an airflow jet which extends to the side surface of the insulator main body, and the lower end of the right jet airflow channel is fixedly provided with a jet airflow component; the air jet assembly at the upper end of the insulator main body is electrically connected with the upper electrode 2, and the air jet assembly at the lower end of the insulator main body is electrically connected with the lower electrode 3.
As shown in fig. 2, the jet air flow module 5 mainly comprises a jet cylinder 12 and an air generator 13; the injection cylinder 12 is embedded on the inner wall of the end part of the injection airflow channel 9, one end of the injection cylinder is fixedly connected with the gas generator 13, and the opening of the other end of the injection cylinder is communicated with the injection airflow channel 9; the gas generator 13 is fixedly arranged at the end part of the jet airflow channel 9, so that the inner space of the insulator main body 4 forms two groups of semi-closed structures, and the arc ignition electrode 14 is arranged on the gas generator 13. An opening of the injection cylinder 12 is provided with an arc guide ring 11. The outer surface of the insulator main body 4 is provided with a skirt edge 10. The wall electrode 7 adopts an arc-conducting electrode plate.
Example 2:
as shown in fig. 4, the structure and principle of this embodiment are substantially the same as those of embodiment 1, except that the wall electrode 7 is a compressed arc tube. The compression arc-extinguishing tube adopts a ceramic tube, and an arc-guiding metal ball is arranged in the middle of the tube.
Example 3:
as shown in fig. 5, the structure and principle of this embodiment are substantially the same as those of embodiment 1, except that the wall electrode 7 is a back-flushing pipe. The recoil pipe is a semi-closed pipe body with one end open and the other end provided with a lightning receiving electrode.
Example 4:
as shown in fig. 6, this embodiment is basically the same as embodiment 3 in structure and principle, except that the opening of the air flow nozzle extending to the side surface of the insulator main body is inclined downward.
Example 5:
the structure and principle of the present embodiment are basically the same as those of embodiment 3, except that a jet airflow assembly is fixedly installed at the upper end of the jet airflow channel on the left side, and the lower end is provided with an airflow nozzle which extends vertically and downwards.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (6)

1. A semi-closed double-jet airflow arc extinguishing insulator comprises an insulator main body (4), an upper electrode (2) and a lower electrode (3), wherein the insulator main body is fixedly arranged on a cross arm or an overhead conductor through a connecting hardware fitting; the method is characterized in that: the interior of the insulator main body (4) is of a hollow structure, a partition plate (8) is further longitudinally arranged in the middle of the interior of the insulator main body, the partition plate (8) divides the inner space of the insulator main body (4) into two groups of air jet channels (9), and a wall electrode (7) is arranged on the partition plate (8); the upper end of the left air injection channel is fixedly provided with an air injection assembly, and the lower end of the air injection assembly is an air injection nozzle which vertically extends downwards or extends towards the side surface of the insulator main body; the upper end of the right jet airflow channel is provided with an airflow jet which extends to the side surface of the insulator main body, and the lower end of the right jet airflow channel is fixedly provided with a jet airflow component; the air jet assembly at the upper end of the insulator main body is electrically connected with the upper electrode (2), and the air jet assembly at the lower end of the insulator main body is electrically connected with the lower electrode (3).
2. The semi-enclosed, dual-jet air flow arc quenching insulator of claim 1, wherein: the jet air flow component (5) mainly comprises a jet cylinder (12) and a gas generator (13); the jet cylinder (12) is embedded on the inner wall of the end part of the jet airflow channel (9), one end of the jet cylinder is fixedly connected with the gas generator (13), and the opening of the other end of the jet cylinder is communicated with the jet airflow channel (9); the gas generator (13) is fixedly arranged at the end part of the jet gas flow channel (9), so that the inner space of the insulator main body (4) forms two groups of semi-closed structures.
3. The semi-enclosed, dual-injection airflow arc quenching insulator of claim 2, wherein: an opening of the injection cylinder (12) is provided with an arc guide ring (11).
4. The semi-enclosed, dual-jet air flow arc quenching insulator of claim 1, wherein: the outer surface of the insulator main body (4) is provided with a skirt edge (10).
5. The semi-enclosed, dual-jet air flow arc quenching insulator of claim 1, wherein: the wall electrode (7) adopts an arc guide electrode plate or a compression arc extinguishing tube or a recoil tube.
6. The semi-enclosed, dual-jet air flow arc quenching insulator of claim 1, wherein: and the opening of the airflow nozzle extending to the side surface of the insulator main body is inclined downwards.
CN201910305837.XA 2019-04-16 2019-04-16 Semi-closed double-jet airflow arc-extinguishing insulator Pending CN111834069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910305837.XA CN111834069A (en) 2019-04-16 2019-04-16 Semi-closed double-jet airflow arc-extinguishing insulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910305837.XA CN111834069A (en) 2019-04-16 2019-04-16 Semi-closed double-jet airflow arc-extinguishing insulator

Publications (1)

Publication Number Publication Date
CN111834069A true CN111834069A (en) 2020-10-27

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ID=72915560

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910305837.XA Pending CN111834069A (en) 2019-04-16 2019-04-16 Semi-closed double-jet airflow arc-extinguishing insulator

Country Status (1)

Country Link
CN (1) CN111834069A (en)

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