CN215452048U - Y-shaped recoil arc-extinguishing device - Google Patents
Y-shaped recoil arc-extinguishing device Download PDFInfo
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- CN215452048U CN215452048U CN202120851685.6U CN202120851685U CN215452048U CN 215452048 U CN215452048 U CN 215452048U CN 202120851685 U CN202120851685 U CN 202120851685U CN 215452048 U CN215452048 U CN 215452048U
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Abstract
The utility model discloses a Y-shaped recoil arc extinguishing device, which belongs to the technical field of lightning protection and arc extinguishing and comprises an arc striking electrode, a recoil pipe and a recoil electrode, wherein the recoil pipe is arranged to be of an internal hollow structure, the recoil pipe is arranged to be of a Y-shaped structure, the arc striking electrode is arranged at the top end of the recoil pipe, and the recoil electrode is arranged at the bottom end of the recoil pipe in a sealing manner. The utility model can effectively destroy the impact arc-establishing channel, inhibit the power frequency arc-establishing process and protect the safety of the power system. The improvement of the capability, the level and the reliability of the device can cause the improvement of the safety of the power system, the probability of various short circuits is greatly reduced, the probability of malignant accidents is greatly reduced, and the cost performance of lightning protection is improved. The insulator can be timely treated before malignant mutation, damage to the insulator is reduced, maintenance cost is reduced, and the protection degree of a line is improved.
Description
Technical Field
The utility model relates to the technical field of lightning protection and arc extinction, in particular to a Y-shaped recoil arc-extinguishing device.
Background
Lightning strike can bring different forms of damage and destruction to electric power facilities, and thundercloud discharge can cause lightning strike overvoltage in an electric power system, and the lightning strike overvoltage is divided into direct lightning strike overvoltage and induced lightning strike overvoltage. Lightning overvoltage can damage insulators and power transmission lines; the line insulator flashover is caused by impact flashover caused by lightning strike on the transmission line, and then large power frequency follow current is generated to damage the insulator string and hardware fittings, so that line accidents are caused; lightning strikes on a power transmission line or a lightning conductor can cause strand breakage and even breakage, so that power transmission work cannot be carried out.
The existing 'dredging type' lightning protection mode mainly installs parallel protection gaps at two ends of an insulator (string), has simple structure and convenient installation, but can only cut off short-circuit current by relying on a breaker because the arc extinguishing function module is not arranged, so that the short-circuit current continuously flows into a system, the accident rate is converted from the trip rate, the lightning trip rate is improved to a certain extent, and huge safety accidents of a line are easily caused. Meanwhile, due to the ablation effect of the short-circuit current, the parallel protection gap insulation matching fails, and the application function is lost.
The electric field of the existing active arc extinguishing parallel gap is mostly an extremely uneven electric field, the volt-second characteristic of the electric field is very steep, and the electric field is difficult to be well matched with the volt-second characteristic of protected insulation. The single-recoil arc-extinguishing device can effectively reduce lightning current, so that the volt-second characteristic of the active arc-extinguishing parallel gap becomes flatter. However, in the process of recoil arc extinguishing by the single recoil device, the discharged arc energy may contact the wire, so that the wire burns, the insulation performance of the line is damaged, and the reliability of power supply is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a Y-shaped recoil arc-extinguishing device, which solves the technical problem that the insulating property of a line is damaged in the recoil arc-extinguishing process of the conventional single recoil arc-extinguishing device. Aiming at the condition that arc extinguishing energy discharged by a single-recoil arc extinguishing device can burn a power transmission line, a Y-shaped recoil arc extinguishing method is provided. The arc extinguishing channel in the existing single-recoil arc extinguishing device is improved, the discharge time of an electric arc can be prolonged, and the circuit is prevented from being burnt by arc extinguishing energy.
The utility model provides a Y type recoil arc control device, includes striking electrode, recoil pipe and recoil electrode, and the recoil pipe sets up to inside hollow structure, and the recoil pipe sets up to "Y" type structure, striking electrode sets up the top at the recoil pipe, and the sealed bottom that sets up at the recoil pipe of recoil electrode.
Furthermore, a plurality of group edges are arranged on the outer side of the back flushing pipe, and the group edges are arranged alternately.
Further, the recoil pipe comprises a forked pipe and a straight pipe, wherein the forked pipe is arranged at one end of the straight pipe.
Further, the arc striking electrode is arranged at the top end of the forked pipe, and the recoil pipe is made of an insulating material.
Further, the bottom of the recoil pipe is provided with an inward-recessed internal thread hole, and the internal thread hole is in threaded connection with an external fixing device.
Further, the arc striking electrode is set as a metal ring electrode, and the recoil electrode is set as a metal electrode.
Further, the recoil arc extinguishing device is arranged at two ends of the insulator in parallel or arranged on the upper electrode or the lower electrode.
By adopting the technical scheme, the utility model has the following technical effects:
the utility model can effectively destroy the impact arc-establishing channel, inhibit the power frequency arc-establishing process and protect the safety of the power system. The improvement of the capability, the level and the reliability of the device can cause the improvement of the safety of the power system, the probability of various short circuits is greatly reduced, the probability of malignant accidents is greatly reduced, and the cost performance of lightning protection is improved. The insulator can be timely treated before malignant mutation, damage to the insulator is reduced, maintenance cost is reduced, and the protection degree of a line is improved.
Drawings
FIG. 1 is a cross-sectional view of a recoil assembly of the present invention.
FIG. 2 is a schematic diagram of the structure of the recoil unit of the present invention.
Reference numbers in the figures: 1-an arc ignition electrode; 2-backflushing the pipe; 2.1-forked tube; 2.2-straight tube; 3-group edge; 4-recoil electrode.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments are given and the present invention is described in further detail. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
A Y-shaped recoil arc extinguishing device is shown in figures 1-2 and comprises an arc striking electrode 1, a recoil pipe 2 and a recoil electrode 4, wherein the recoil pipe 2 is of an internal hollow structure, the recoil pipe 2 is of a Y-shaped structure, the arc striking electrode 1 is arranged at the top end of the recoil pipe 2, and the recoil electrode 4 is hermetically arranged at the bottom end of the recoil pipe 2. The outside of the recoil pipe 2 is provided with a plurality of group edges 3, and the plurality of group edges 3 are arranged alternately. The backflushing pipe 2 comprises a forked pipe 2.1 and a straight pipe 2.2, wherein the forked pipe 2.1 is arranged at one end of the straight pipe 2.2. The ignition electrode 1 is arranged at the top end of the bifurcated pipe 2.1, and the recoil pipe 2 is made of an insulating material. The bottom of the recoil pipe 2 is provided with an inward-recessed internal thread hole, and the internal thread hole is in threaded connection with an external fixing device. The arc ignition electrode 1 is set as a metal ring electrode, and the recoil electrode 4 is set as a metal electrode. The recoil arc extinguishing devices are arranged at two ends of the insulator in parallel or arranged on the upper electrode or the lower electrode.
The recoil pipe 2 is set as a support body, when lightning flashover electric arc is close to the Y-shaped recoil arc extinguishing device, an arc striking electrode forms an ascending pilot by carrying out physical touch, coulomb force action and point discharge on the flashover electric arc, the electric arc is dragged to the inlet of the Y-shaped recoil arc extinguishing device, the outer electric arc enters the superfine recoil pipe under the action of the lightning receiving electrode, and the inner diameter of the recoil pipe is far smaller than the diameter of the electric arc. The arc column is filled by the narrow pipe in the recoil pipe, the arc generates elastic deformation, the radial deformation of the arc is converted into axial deformation, and the axial elastic force of the arc is improved. The arc is limited by the pipe wall in the back-flushing pipe, the diameter of the arc column is forcibly reduced, so that the conductive cross-sectional area of the whole arc is reduced, the resistance of the arc is increased, and the power calculation formula is as follows: p ═ I2R, it is known that the arc power also increases, and the heat and temperature in the tube increase. The inlet arc and the outlet arc generate 180-degree opposite impact collision in the tube and are cut offThe channels of arc radiation, convection, conduction and loss are formed, the heat dissipation is blocked, and the temperature is further increased; at the same time, the density of the arc plasma in the tube increases sharply, the friction and collision between particles are accelerated, and the heat and temperature rise again. The temperature difference between the inside and the outside of the recoil pipe is increased, so that the pressure difference is increased, when the pressure in the recoil pipe is greater than the pressure outside the pipe, the directional electric arc explosion effect from inside to outside is generated, and the explosion effect causes the electric arc discharge: on the one hand, the arc in the tube is rapidly evacuated; and on the other hand, the outer arc cavity effect blocks the injection of the energy of the outer arc. The continuity of the electric arc is destroyed, the extinguishing of the lightning impulse electric arc is accelerated, and the formation of a power frequency arc establishing channel is eliminated. The umbrella skirt of the device can increase creepage distance, so that electric arcs can enter the backflushing pipe more easily, and direct flashover of the electric arcs on the outer surface of the Y-shaped backflushing device is avoided.
An arc extinguishing path with a Y-shaped recoil structure is designed. The Y-shaped recoil pipe is made of high-hardness, high-temperature-resistant and high-pressure-resistant inorganic non-metallic materials, an arc striking electrode is arranged at the inlet of the Y-shaped recoil pipe and made of conductive materials, and the purpose is to enable electric arcs to smoothly enter the recoil pipe. The inside of the Y-shaped recoil pipe is a semi-closed space which is an area for elastic collision of electric arcs. The electric arc is compressed in the recoil pipe, and a part of energy is discharged from the upper port of the Y-shaped recoil pipe in a recoil mode, so that the lightning current is reduced, and the discharge time of the electric arc is prolonged.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (7)
1. A Y-shaped recoil arc-extinguishing device is characterized in that: including striking electrode (1), recoil pipe (2) and recoil electrode (4), recoil pipe (2) set up to inside hollow structure, and recoil pipe (2) set up to "Y" type structure, striking electrode (1) sets up on the top of recoil pipe (2), and sealed the setting in the bottom of recoil pipe (2) of recoil electrode (4).
2. The Y-shaped recoil arc extinguishing device according to claim 1, wherein: the outer side of the back flushing pipe (2) is provided with a plurality of group edges (3), and the group edges (3) are arranged alternately.
3. The Y-shaped recoil arc extinguishing device according to claim 1, wherein: the backflushing pipe (2) comprises a forked pipe (2.1) and a straight pipe (2.2), wherein the forked pipe (2.1) is arranged at one end of the straight pipe (2.2).
4. The Y-shaped recoil arc extinguishing device according to claim 3, wherein: the arc striking electrode (1) is arranged at the top end of the forked pipe (2.1), and the recoil pipe (2) is made of insulating materials.
5. The Y-shaped recoil arc extinguishing device according to claim 4, wherein: the bottom of the backflushing pipe (2) is provided with an inward-sunken internal thread hole, and the internal thread hole is in threaded connection with an external fixing device.
6. The Y-shaped recoil arc extinguishing device according to claim 5, wherein: the arc ignition electrode (1) is set as a metal ring electrode, and the recoil electrode (4) is set as a metal electrode.
7. The Y-shaped recoil arc extinguishing device according to claim 6, wherein: the recoil arc extinguishing devices are arranged at two ends of the insulator in parallel or arranged on the upper electrode or the lower electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120851685.6U CN215452048U (en) | 2021-04-23 | 2021-04-23 | Y-shaped recoil arc-extinguishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120851685.6U CN215452048U (en) | 2021-04-23 | 2021-04-23 | Y-shaped recoil arc-extinguishing device |
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| Publication Number | Publication Date |
|---|---|
| CN215452048U true CN215452048U (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120851685.6U Active CN215452048U (en) | 2021-04-23 | 2021-04-23 | Y-shaped recoil arc-extinguishing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116727808A (en) * | 2023-05-05 | 2023-09-12 | 佛山市三乔焊接实业有限公司 | Arc striking circuit of stud welding machine |
-
2021
- 2021-04-23 CN CN202120851685.6U patent/CN215452048U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116727808A (en) * | 2023-05-05 | 2023-09-12 | 佛山市三乔焊接实业有限公司 | Arc striking circuit of stud welding machine |
| CN116727808B (en) * | 2023-05-05 | 2024-02-02 | 佛山市三乔焊接实业有限公司 | Arc striking circuit of stud welding machine |
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