CN217444172U

CN217444172U - Line lightning protection and multi-chamber gap line structure

Info

Publication number: CN217444172U
Application number: CN202220892526.5U
Authority: CN
Inventors: 魏邦钦; 李勇; 赵勇; 王健
Original assignee: Yichang Hengyuan Technology Co ltd
Current assignee: Yichang Hengyuan Technology Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-09-16
Anticipated expiration: 2032-04-18

Abstract

The utility model provides a line lightning protection and multicavity room clearance circuit structure, including supporting insulator and arc extinguishing unit, supporting insulator and arc extinguishing unit one end set up in the backup pad side by side, and the supporting insulator other end is equipped with the striking electrode, and striking electrode one end is connected with supporting insulator, and the other end forms discharge gap with arc extinguishing unit tip, and the arc extinguishing unit is inside to be equipped with a plurality of spherical intermediate electrodes, is equipped with the electric arc quenching room that the cross-section is the structure of falling the trapezoid between two intermediate electrodes, and the intermediate electrode both sides are respectively through discharge channel and electric arc quenching room intercommunication. The product adopts a pure air gap structure to be isolated from a power grid, does not bear system voltage and system operation overvoltage, enhances reliability, prolongs service life and reduces maintenance cost.

Description

Line lightning protection and multi-chamber gap line structure

Technical Field

The utility model belongs to the technical field of the circuit lightning protection and specifically relates to a circuit lightning protection and multicavity room clearance circuit structure is related to.

Background

The lightning stroke accidents of the urban power distribution network cable occur occasionally, particularly after the overhead insulated cable is adopted, the line breaking accidents caused by lightning damage are relatively increased, and the problem of the lightning damage line breaking can be solved by additionally arranging a line type overvoltage protector (hereinafter referred to as a protector). The protector consists of a discharge ring, a protector element and a bracket and is fixed on the insulator. The protector adopts a discharge ring (a current-guiding ring or an arc discharge gap) to facilitate the moving, lengthening and extinguishing of the electric arc; the high power frequency discharge voltage ensures that the lightning arrester does not act under the over-voltage operation; the excellent nonlinearity of protector component makes power frequency afterflow restriction very little, is favorable to the electric arc to extinguish in the twinkling of an eye, avoids insulator flashover or puncture, protects overhead line wire, avoids taking place the broken string accident, ensures overhead line's safe operation. However, the existing 10kV distribution line protector is low in overall insulation level, free of lightning conductor and special ground, and extremely low in lightning resistance level; the distribution lines mainly sense lightning threats, the lightning hazard coverage is wide, and the number of trip lines is large; the distribution line insulated wires are applied in a large quantity, the lightning stroke wire breakage condition is serious, and the first-aid repair recovery time is long.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a line lightning protection and multi-chamber gap line structure, solving the problems that the protector of the 10kV distribution line has low overall insulation level, no lightning conductor, no special grounding and extremely low lightning resistance level; the distribution lines mainly sense lightning threats, the lightning hazard coverage is wide, and the number of trip lines is large; the distribution line insulated conductor is applied in a large quantity, the lightning stroke broken line condition is serious, and the repair recovery time is long.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a circuit lightning protection and multi-chamber clearance line structure, including supporting insulator and arc extinguishing unit, supporting insulator and arc extinguishing unit one end set up in the backup pad side by side, the supporting insulator other end is equipped with the striking electrode, striking electrode one end is connected with supporting insulator, the other end forms the discharge gap with arc extinguishing unit tip, the inside a plurality of spherical intermediate electrodes that are equipped with of arc extinguishing unit, be equipped with the electric arc quenching room that the cross-section is the structure of falling the trapezium between two intermediate electrodes, intermediate electrode both sides are respectively through discharge channel and electric arc quenching room intercommunication.

In the preferred scheme, a flexible wire is further arranged, one end of the flexible wire is electrically connected with the conducting wire through a wire clamp, and the flexible wire is electrically connected with the arc striking electrode.

In the preferred scheme, the body of the arc extinguishing unit is a silicon rubber rod, the end part of the silicon rubber rod is provided with a contact head, and the contact head is electrically connected with a middle electrode at the end part of the silicon rubber rod.

In a preferred scheme, the end part of the arc striking electrode is fixedly connected with the end part of the supporting insulator through a nut.

In the preferred scheme, the arc extinguishing unit and the end part of the supporting insulator are fixedly connected with the supporting plate through nuts.

In the preferred scheme, the arc extinguishing unit and the supporting insulator are installed on the straight rod, and the arc extinguishing unit and the supporting insulator are installed in an upward inclined mode.

In the preferred scheme, strain insulator pole installation arc extinguishing unit and support insulator, installation arc extinguishing unit and the downward slope of support insulator are installed.

The utility model provides a circuit lightning protection and multi-chamber clearance circuit structure, the beneficial effect of this structure is:

1. the product adopts a pure air gap structure to be isolated from a power grid, does not bear system voltage and system operation overvoltage, enhances reliability, prolongs service life and reduces maintenance cost;

2. the lightning stroke trip-out rate is effectively reduced;

3. the product can avoid insulator lightning flashover, avoid lightning breakage and reduce lightning outage time and lightning failure rate;

4. the product adopts a natural body for grounding, the product does not need to adjust and detect the grounding condition, does not need an additional grounding wire, and is convenient, simple and reliable to install;

5. the product does not need manual maintenance, and can be self-cleaned and self-protected.

Drawings

The invention will be further explained with reference to the following figures and examples:

FIG. 1 is a view of the installation structure of the linear rod of the present invention;

FIG. 2 is a diagram of the tension rod installation body of the present invention;

fig. 3 is a top cross-sectional structural view of the arc extinguishing unit of the present invention;

fig. 4 is a front sectional structural view of the arc extinguishing unit of the present invention;

fig. 5 is a schematic diagram of arc extinguishing discharge of the arc extinguishing unit of the present invention;

in the figure: a wire 1; a wire clamp 2; a flexible wire 3; an arc ignition electrode 4; an arc extinguishing unit 5; a silicone rubber rod 501; an intermediate electrode 502; a discharge channel 503; a contact tip 504; an arc quenching chamber 505; a support insulator 6; a support plate 7; a fixed top insulator 8; tension rods 9.

Detailed Description

As shown in fig. 1 to 5, a line lightning protection and multi-chamber gap line structure includes a supporting insulator 6 and an arc extinguishing unit 5, one end of the supporting insulator 6 and one end of the arc extinguishing unit 5 are arranged side by side on a supporting plate 7, the other end of the supporting insulator 6 is provided with an arc striking electrode 4, one end of the arc striking electrode 4 is connected with the supporting insulator 6, the other end of the arc striking electrode forms a discharge gap with the end of the arc extinguishing unit 5, a plurality of spherical intermediate electrodes 502 are arranged inside the arc extinguishing unit 5, an arc quenching chamber 505 with an inverted trapezoid-shaped cross section is arranged between the two intermediate electrodes 502, and two sides of the intermediate electrodes 502 are respectively communicated with the arc quenching chamber 505 through discharge channels 503.

The simple quenching principle technology is utilized to protect the overhead line from being damaged by lightning stroke, and the large energy of the short-circuit current of the line caused by the lightning stroke can be released into the air. Meanwhile, other auxiliary equipment such as a grounding wire and a grounding rod is not required to be added, and the simple quenching arc works under the natural resistance of the electric pole and the cross arm.

When a lightning strike occurs, the overvoltage (direct or indirect) generated by the lightning strike is firstly broken down in the air gap between the outer terminal electrode and the wire clamp installed on the conductor, a large arc is generated between the arc extinguishing unit 5 and the discharge gap line lightning protection device of the arc striking electrode 4, the discharge is conducted to the inside of the arc extinguishing unit 5, the metal characteristics of the middle electrode 502 can enable the discharge channels 503 to discharge one by one, the large arc generated by a high-power lightning overvoltage is converted into small arcs, and the small arcs are discharged from the arc quenching chambers 505 of two adjacent middle electrodes 502 as shown in fig. 5. The high-pressure gas generated in the process of arc release blows small arcs to the surrounding air, so that the maximum arc extinguishing time for arc extinguishing is less than 10 milliseconds, a power grid stably runs, and the power supply system outage or reclosing operation is reduced.

The multi-cavity gap line lightning protection device only needs to be installed on a distribution line once in application, and can be used together with the traditional lightning protection equipment of a transformer substation to protect equipment such as a transformer and the like from damage caused by various overvoltage and power frequency follow current.

Preferably, a flexible wire 3 is further arranged, one end of the flexible wire 3 is electrically connected with the lead wire 1 through a wire clamp 2, and the flexible wire 3 is electrically connected with the arc striking electrode 4. The flexible wire 3 is electrically connected with the lead 1 through the wire clamp 2, and the flexible wire 3 plays a role of transmitting voltage.

Preferably, the body of the arc extinguishing unit 5 is a silicon rubber rod 501, a contact 504 is arranged at an end of the silicon rubber rod 501, and the contact 504 is electrically connected with the middle electrode 502 at the end of the silicon rubber rod 501. The silicon rubber rod 501 has good insulation, lightning protection and anti-aging effects.

In a preferred scheme, the end part of the arc ignition electrode 4 is fixedly connected with the end part of the supporting insulator 6 through a nut. The arc striking electrode 4 is locked and installed at the end of the supporting insulator 6 through a nut.

Preferably, the end portions of the arc extinguishing unit 5 and the supporting insulator 6 are fixedly connected with the supporting plate 7 through nuts. The arc extinguishing unit 5 and the end of the supporting insulator 6 are mounted on the supporting plate 7 by means of nuts.

In a preferred scheme, the arc extinguishing unit 5 and the supporting insulator 6 are installed on the straight rod, and the arc extinguishing unit 5 and the supporting insulator 6 are installed in an upward inclined mode. With the structure shown in fig. 1, the arc extinguishing unit 5 and the supporting insulator 6 are arranged to incline upwards, so that equipment such as a transformer and the like can be protected from being damaged by various overvoltages and power frequency follow currents.

In the preferred scheme, the tension rod is provided with the arc extinguishing unit 5 and the supporting insulator 6, and the arc extinguishing unit 5 and the supporting insulator 6 are obliquely arranged in the downward direction. As shown in the structure of fig. 2, the tension rod installation arc extinguishing unit 5 and the supporting insulator 6 are installed in an inclined mode in the downward direction, installation is convenient, and devices such as a transformer and the like can be protected from damage caused by various overvoltage and power frequency follow currents.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. The utility model provides a circuit lightning protection and multicavity room clearance circuit structure, characterized by: including supporting insulator (6) and arc extinguishing unit (5), supporting insulator (6) and arc extinguishing unit (5) one end set up side by side on backup pad (7), supporting insulator (6) other end is equipped with striking electrode (4), striking electrode (4) one end is connected with supporting insulator (6), the other end forms discharge gap with arc extinguishing unit (5) tip, arc extinguishing unit (5) inside is equipped with a plurality of spherical intermediate electrode (502), be equipped with arc quenching room (505) that the cross-section is the structure of falling the trapezium between two intermediate electrode (502), intermediate electrode (502) both sides are respectively through discharge channel (503) and arc quenching room (505) intercommunication.

2. The line lightning protection and multi-chamber gap line structure of claim 1, wherein: and a flexible wire (3) is also arranged, one end of the flexible wire (3) is electrically connected with the lead (1) through a wire clamp (2), and the flexible wire (3) is electrically connected with the arc striking electrode (4).

3. The line lightning protection and multi-chamber gap line structure of claim 1, wherein: the body of the arc extinguishing unit (5) is a silicon rubber rod (501), a contact head (504) is arranged at the end part of the silicon rubber rod (501), and the contact head (504) is electrically connected with a middle electrode (502) at the end part of the silicon rubber rod (501).

4. The line lightning protection and multi-chamber gap line structure of claim 1, wherein: the end part of the arc striking electrode (4) is fixedly connected with the end part of the supporting insulator (6) through a nut.

5. The line lightning protection and multi-chamber gap line structure of claim 1, wherein: the end parts of the arc extinguishing unit (5) and the supporting insulator (6) are fixedly connected with the supporting plate (7) through nuts.

6. The line lightning protection and multi-chamber gap line structure of claim 1, wherein: the arc extinguishing unit (5) and the supporting insulator (6) are installed on the straight line rod, and the arc extinguishing unit (5) and the supporting insulator (6) are installed in an upward inclined mode.

7. The line lightning protection and multi-chamber gap line structure of claim 1, wherein: the tension rod is provided with an arc extinguishing unit (5) and a supporting insulator (6), and the arc extinguishing unit (5) and the supporting insulator (6) are installed in an inclined mode in the downward direction.