CN213424750U

CN213424750U - Series multi-gap metal oxide arrester

Info

Publication number: CN213424750U
Application number: CN202022968304.0U
Authority: CN
Inventors: 朱淑梅; 王晓利; 刘剑秋; 于金燕
Original assignee: Liaoning Hualong Electric Technology Inc Co
Current assignee: Liaoning Hualong Electric Technology Inc Co
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-06-11
Anticipated expiration: 2030-12-10

Abstract

The utility model discloses a many clearance metal oxide arresters of establishing ties, include: the core comprises an SMC layer, and a first electrode, a first insulating rod, a second electrode, three resistance discs, a third electrode, a second insulating rod and a fourth electrode which are arranged in the SMC layer; the first discharge rod is connected with the first electrode, the first discharge ball is connected with the second electrode, the second discharge rod is connected with the third electrode, and the second discharge ball is connected with the fourth electrode; the end covers are arranged at two ends of the silicon rubber outer sleeve, the first conductive bolt penetrates through the end covers to be connected with the first electrode, the first conductive bolt is connected with the high-voltage bus, the second conductive bolt penetrates through the end cover at the other side to be connected with the fourth electrode, and the second conductive bolt is connected with the ground wire. The utility model discloses a two clearance designs, and the clearance structure is the design of ball crack, and discharge voltage is more stable, and protective properties is more reliable.

Description

Series multi-gap metal oxide arrester

Technical Field

The utility model belongs to the technical field of the arrester, a many clearance metal oxide arresters of establishing ties is related to.

Background

With the continuous lengthening of power distribution network lines and the popularization of insulation design, the line breaking accident caused by lightning damage is obvious, the statistical number of insulator breakdown accidents is continuously increased, and the safe operation of the power distribution network lines is seriously threatened. The lightning arrester is an electrical device which can release thunder and lightning or release overvoltage energy for operating an electric power system, protect electrical equipment from being damaged by instantaneous overvoltage, and cut off follow current without causing short circuit of system grounding. The arrester can effectual protection power equipment, in case abnormal voltage appears, the arrester plays the guard action, and after the magnitude of voltage is normal, the arrester reconverted fast again to guarantee the normal power supply of system.

The clearance design of traditional clearance arrester is whole to be single clearance, and its clearance also is mostly split type design with the arrester body, clearance and arrester independent structure promptly, and the cooperation installation, its electrical property is difficult to guarantee. Some gaps are designed before the arrester body, and others are designed after the arrester body. The gap is designed in front of the arrester body, the arrester body is isolated from the system, and when overvoltage occurs, the overvoltage energy is released at one time. The gap is designed behind the arrester body, and after the arrester reaches the discharge voltage, the gap is continuously pressurized, so that the gap is broken down, and overvoltage energy is externally released. The two designs have advantages and disadvantages, the discharge mechanisms are various, and the electric field distribution is disordered, so that the discharge voltage is unstable, and the protection performance is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a many clearances of series connection metal oxide arrester adopts the design of two clearances, and the clearance structure is the design of ball crack, and discharge voltage is more stable, and protective properties is more reliable.

The utility model discloses a many clearance metal oxide arresters of establishing ties, include: the core comprises an SMC layer, and a first electrode, a first insulating rod, a second electrode, three resistance sheets, a third electrode, a second insulating rod and a fourth electrode which are sequentially arranged in the SMC layer; the silicon rubber outer sleeve is wrapped outside the core body, the first discharge rod is connected with the first electrode, the first discharge ball is connected with the second electrode, the second discharge rod is connected with the third electrode, and the second discharge ball is connected with the fourth electrode; the end covers are installed at two ends of the silicon rubber outer sleeve, the first conductive bolt penetrates through the end cover on one side to be connected with the first electrode, the first conductive bolt is connected with the high-voltage bus, the second conductive bolt penetrates through the end cover on the other side to be connected with the fourth electrode, and the second conductive bolt is fixed on the cross arm and connected with the ground wire.

The utility model discloses an among the many clearances metal oxide arrester of establishing ties, the resistance card is piezo-resistor.

The utility model discloses an among the many clearances of series connection metal oxide arrester, silicon rubber overcoat surface integrated into one piece has a plurality of silicon rubber full skirts.

The utility model discloses a many clearance metal oxide arresters of establishing ties has following beneficial effect at least:

1. the utility model discloses a many clearances arrester adopts the design of two clearances, and the clearance structure is the design of ball clearance, and discharge voltage is more stable, and protective properties is more reliable.

2. The utility model discloses many clearance arrester is at arrester body both ends, respectively has designed a discharge gap around promptly to make the characteristics that have possessed two kinds of structures, it is more stable to discharge, and arc rupture arc light effect is more excellent.

3. The utility model discloses many clearance arrester, clearance mechanism and arrester formula as an organic whole design, electric stable performance, simple to operate.

Drawings

Fig. 1 is a schematic structural diagram of a series multi-gap metal oxide arrester of the present invention;

fig. 2 is a cross-sectional view of a series multiple gap metal oxide arrester of the present invention;

fig. 3 is a sectional view of the core.

Detailed Description

As shown in fig. 1-3, the utility model discloses a series connection multi-gap metal oxide arrester, include: the core body, the silicon rubber jacket 2, the first discharging rod 4, the second discharging rod 6, the first discharging ball 5, the second discharging ball 7, the first conductive bolt 3 and the second conductive bolt 9. The core body comprises an SMC layer 18, and a first electrode 11, a first insulating rod 12, a second electrode 13, three resistive sheets 14, a third electrode 15, a second insulating rod 16 and a fourth electrode 17 which are arranged in the SMC layer 18 in sequence. The silicon rubber outer sleeve 2 is wrapped outside the core body, the first discharge rod 4 is connected with the first electrode 11, the first discharge ball 5 is connected with the second electrode 13, the second discharge rod 6 is connected with the third electrode 15, and the second discharge ball 7 is connected with the fourth electrode 17. End covers 8 are installed at two ends of the silicon rubber outer sleeve 2, the first conductive bolt 3 penetrates through the end cover 8 on one side to be connected with the first electrode 11, the first conductive bolt 3 is connected with a high-voltage bus, the second conductive bolt 9 penetrates through the end cover 8 on the other side to be connected with the fourth electrode 17, and the second conductive bolt 9 is fixed on the cross arm and connected with the ground wire.

The resistor disc 14 is a voltage dependent resistor.

And a plurality of silicon rubber umbrella skirts are integrally formed on the surface of the silicon rubber outer sleeve 2.

The utility model discloses a same with traditional gapless arrester during the arrester installation, high-voltage bus is connected to the upper end, with the system equipotential, the lower extreme is good ground connection, with the earth equipotential.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the spirit of the present invention, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A series multiple gap metal oxide arrester, comprising: the core comprises an SMC layer, and a first electrode, a first insulating rod, a second electrode, three resistance sheets, a third electrode, a second insulating rod and a fourth electrode which are sequentially arranged in the SMC layer; the silicon rubber outer sleeve is wrapped outside the core body, the first discharge rod is connected with the first electrode, the first discharge ball is connected with the second electrode, the second discharge rod is connected with the third electrode, and the second discharge ball is connected with the fourth electrode; the end covers are installed at two ends of the silicon rubber outer sleeve, the first conductive bolt penetrates through the end cover on one side to be connected with the first electrode, the first conductive bolt is connected with the high-voltage bus, the second conductive bolt penetrates through the end cover on the other side to be connected with the fourth electrode, and the second conductive bolt is fixed on the cross arm and connected with the ground wire.

2. The series multi-gap metal oxide arrester of claim 1 wherein the resistive patch is a varistor.

3. The tandem multi-gap metal oxide surge arrester of claim 1 wherein the silicone rubber casing has a plurality of silicone rubber sheds integrally formed on a surface thereof.