CN220774053U

CN220774053U - Double-column lightning arrester

Info

Publication number: CN220774053U
Application number: CN202322429340.3U
Authority: CN
Inventors: 朱杰; 蒋烨; 李向军; 姜玉根; 高奇峰
Original assignee: Ningbo Zhenhai Guochuang High Voltage Electric Apparatus Co ltd
Current assignee: Ningbo Zhenhai Guochuang High Voltage Electric Apparatus Co ltd
Priority date: 2023-09-06
Filing date: 2023-09-06
Publication date: 2024-04-12
Anticipated expiration: 2033-09-06

Abstract

The utility model discloses a double-column lightning arrester, which comprises an end cover, a bottom cover and an insulating shell, wherein the end cover is arranged on the bottom cover; an upper wiring terminal is led out from the end cover, and a lower wiring terminal is led out from the bottom cover; a first valve plate column and a second valve plate column are arranged in parallel at intervals in the insulating shell; the first valve block column consists of a plurality of valve blocks penetrating through the first core rod; the top surface of the first valve block column contacts the upper wiring end through the first spring, and meanwhile, the bottom surface of the first valve block column compresses the metal conductive strip under the elasticity of the first spring; the second valve block column is composed of a plurality of valve blocks penetrating through the second core rod, the bottom surface of the second valve block column is connected with the lower wiring end through a second spring, and meanwhile, the top surface of the second valve block column is pressed against the metal conductive strip under the action of the elastic force of the second spring.

Description

Double-column lightning arrester

Technical Field

The utility model relates to a lightning arrester, in particular to a double-column type lightning arrester.

Background

The arrester is also called overvoltage protector or overvoltage limiter. The lightning arresters are typically connected between the grid cable and ground in parallel with the protected equipment. The lightning arrester can effectively protect equipment, and once abnormal voltage appears, the lightning arrester acts to play a role in protection. When the device is operated at normal operating voltage, the lightning arrester will not function and is considered to be open circuit to the ground. Once a high voltage occurs and the insulation of the protected equipment is compromised, the lightning arrester acts immediately, directing the surge current to ground, limiting the overvoltage amplitude and protecting the equipment. After the overvoltage disappears, the lightning arrester quickly recovers the open circuit state, so that the equipment and the circuit work normally.

The zinc oxide resistor disc in the zinc oxide lightning arrester commonly used at present has good nonlinear volt-ampere characteristic. When normal operating voltage is applied to the arrester, only a small leakage current in the resistor disc passes, which is equal to an open circuit. When overvoltage occurs, a large current passes through the lightning arrester, but the voltage is limited to a certain range and is close to a short circuit.

The zinc oxide arrester is internally formed by stacking a plurality of zinc oxide resistor pieces, terminal electrodes are respectively connected to two ends of the zinc oxide resistor pieces, an upper terminal electrode is connected to a power grid wire, and a lower terminal electrode is connected to a ground wire. The outside of the lightning arrester is provided with an insulating jacket, and the insulating jacket plays a role in sealing at the same time so as to prevent external water vapor from entering the lightning arrester to cause short circuit.

The number of zinc oxide resistor discs (valve plates) in the lightning arrester is determined by voltage, however, when the number of the required valve plates is large, the whole length of the lightning arrester is long, and the lightning arrester is inconvenient to manufacture, assemble and install on site.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present utility model provides a dual-column lightning arrester, comprising an end cover, a bottom cover, and an insulating housing; an upper wiring terminal is led out from the end cover, and a lower wiring terminal is led out from the bottom cover; a first valve plate column and a second valve plate column are arranged in parallel at intervals in the insulating shell; the first valve block column consists of a plurality of valve blocks penetrating through the first core rod; the top surface of the first valve block column contacts the upper wiring end through the first spring, and meanwhile, the bottom surface of the first valve block column compresses the metal conductive strip under the elasticity of the first spring; the second valve block column is composed of a plurality of valve blocks penetrating through the second core rod, the bottom surface of the second valve block column is connected with the lower wiring end through a second spring, and meanwhile, the top surface of the second valve block column is pressed against the metal conductive strip under the action of the elastic force of the second spring.

Further, an insulating positioning disc is also arranged on the insulating shell; the insulating positioning disc is made of insulating materials, and is provided with positioning holes for positioning the first valve plate column and the second valve plate column and slotted holes for the metal conducting strips to pass through; the insulating positioning disk is used for fixing and isolating the first valve plate column and the second valve plate column.

Further, the valve plate is a zinc oxide resistor plate.

Further, the metal conductive strip is an aluminum strip.

Further, the insulating housing is oval.

Further, the insulating positioning disk is elliptical.

According to the utility model, the valve plate columns are arranged side by side, and meanwhile, the valve plate columns are connected in series through the metal conducting strips, so that the overall height of the lightning arrester is reduced while the lightning arrester is ensured to have enough valve plates, and the lightning arrester is convenient to transport and install on site.

The conception, specific structure, and technical effects of the present utility model will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present utility model.

Drawings

Fig. 1 is a schematic view of a double column arrester in a preferred embodiment of the present utility model;

fig. 2 is a top view of the insulating puck of fig. 1.

Detailed Description

The following description of the preferred embodiments of the present utility model refers to the accompanying drawings, which make the technical contents thereof more clear and easy to understand. The present utility model may be embodied in many different forms of embodiments and the scope of the present utility model is not limited to only the embodiments described herein.

As shown in fig. 1, the present utility model provides a double-column arrester comprising an end cover 3, a bottom cover 7, and an insulating housing 10. An upper terminal 1 is led out from the end cover 3, and a lower terminal 2 is led out from the bottom cover 4. Inside the insulating housing 10, a first valve sheet 5 and a second valve sheet 6 are arranged side by side at intervals. The first valve block column 5 is composed of a plurality of valve blocks penetrating through the first core rod 11, the top surface of the first valve block column 5 is in contact with the upper wiring end 1 through the first spring 7, and meanwhile, the bottom surface of the first valve block column 5 is pressed against the metal conductive strip 9 under the elasticity of the first spring 7. The second valve block column 6 is composed of a plurality of valve blocks penetrating through the second core rod 12, the bottom surface of the second valve block column 6 is connected with the lower wiring end through the second spring 8, and meanwhile, the top surface of the second valve block column 6 is pressed against the metal conductive strip 9 under the elastic force of the second spring 8.

Referring to fig. 1 and also to fig. 2, an insulating positioning disk 13 is further provided in the insulating housing 10. The insulating spacer 13 is made of an insulating material, and is provided with positioning holes 131, 132 for positioning the first and second valve plates 5, 6, and slots 133 for passing the metal conductive strips 9. The function of the insulating positioning disk is to fix and isolate the first valve block 5 and the second valve block 6

Wherein, the valve block is zinc oxide resistance card, and the metal conducting strip is aluminium strip.

Wherein, insulating shell and insulating positioning disk are oval.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. The double-column lightning arrester is characterized by comprising an end cover, a bottom cover and an insulating shell; an upper wiring terminal is led out from the end cover, and a lower wiring terminal is led out from the bottom cover; a first valve plate column and a second valve plate column are arranged in parallel at intervals in the insulating shell; the first valve block column consists of a plurality of valve blocks penetrating through the first core rod; the top surface of the first valve block column contacts the upper wiring end through the first spring, and meanwhile, the bottom surface of the first valve block column compresses the metal conductive strip under the elasticity of the first spring; the second valve block column is composed of a plurality of valve blocks penetrating through the second core rod, the bottom surface of the second valve block column is connected with the lower wiring end through a second spring, and meanwhile, the top surface of the second valve block column is pressed against the metal conductive strip under the action of the elastic force of the second spring.

2. The double column arrester of claim 1 wherein an insulating positioning disk is further provided on the insulating housing; the insulating positioning disc is made of insulating materials, and is provided with positioning holes for positioning the first valve plate column and the second valve plate column and slotted holes for the metal conducting strips to pass through; the insulating positioning disk is used for fixing and isolating the first valve plate column and the second valve plate column.

3. The double column arrester of claim 2 wherein the valve sheet is a zinc oxide resistive sheet.

4. A double column arrester as in claim 3, wherein the metal conductive strip is an aluminum strip.

5. The double column arrester of claim 4 wherein the insulating housing is oval.

6. The double column arrester of claim 5 wherein the insulating positioning disk is oval.