KR200454411Y1 - Lead Wire Attached Polymer Lightning Arrester - Google Patents

Abstract

The present invention relates to a lead wire-attached polymer lightning arrester, comprising: an arrester module including a device formed of zinc oxide and an aluminum electrode coupled to both ends of the device; A connection electrode coupled to one end of the aluminum electrode and connecting the lowering wire and the aluminum electrode; And a housing injection molded to surround one end of the reduction wire and the arrester module. As a result, it is not necessary to separately perform the process of connecting the reduction wires, thereby facilitating the installation of the polymer arrester. In addition, the insulation performance is improved since the air tightness of the cutting wire and the polymer housing is maintained during the injection of the polymer housing and the insulating area extends to the wire area for the cutting. In addition, since the charging unit is not exposed to the outside, it is possible to prevent safety accidents due to contact of the human body or failure due to birds.

Polymer, Arrester, Airtight, Reduction Wire, Connecting Electrode, Housing

Description

Polymer lightening arrester with voltage lead wire in one body}

The present invention relates to a lead wire-attached polymer lightning arrester, and more particularly, by forming the lowering wire integrally with the lightning arrester, the airtightness between the lowering wire and the lightning arrester is maintained, and the insulation area is extended to improve the insulation performance. It relates to a type polymer arrester.

In general, when abnormal overvoltage is induced in the power system, insulation breakdown of the power device occurs, and when high voltage penetrates into the power consumer, electric and electronic devices are damaged and shorten the lifespan.

The arrester prevents temporary overvoltages such as surge voltages caused by lightning strikes or circuit switching in power transmission / distribution, power plants, substations and tram lines to prevent insulation breakdown of power equipment, damage to electrical and electronic devices, and shortening of life. It is a protective device.

The arrester used for the distribution line includes an arrester module composed of an insulator and a housing surrounding the arrester module. The arrester module uses a zinc oxide device having excellent non-linearity to allow no-pore discharge, and the housing is made of porcelain or polymer.

In the case of an arrester having a magnetic housing, the magnetic housing is cracked and eroded due to a difference in coefficient of thermal expansion, mechanical fatigue caused by repeated cold and arc heat. In addition, in the case of a rubber gasket used to maintain the airtight between the upper electrode and the lower electrode of the magnetic housing, when the elasticity is lowered due to aging and compressive stress, the airtightness is lowered. Accordingly, arcs are generated and destroyed by deterioration of moisture absorption, and moisture is accumulated and condensed by moisture inflow, which causes flashovers inside the arrester, and through flashing occurs through flashovers. In particular, when an explosion occurs due to an arc discharge caused by a lightning strike, the fragments scattered, which may cause damage to surrounding power equipment as well as human damage.

In the case of a lightning arrester having a polymer housing made of a polymer, the polymer housing is injected and then assembled by inserting the arrester module into the polymer housing. Then, a sealant is applied to the upper and lower portions, and a stainless cover is attached with a stud bolt fitted with an O-ring. To keep it confidential. The polymer housing can not only reduce the size and weight of the arrester, but also improve the explosion-proof performance in case of short circuit inside the arrester, and improve the airtightness and fouling resistance against moisture absorption, which is the main cause of the arrester accident. However, a lightning arrester having a polymer housing may not be permanently maintained due to inadvertent operation and secular changes in the natural environment during the sealing process, and there is a possibility that an electrical accident due to moisture absorption may occur when the airtightness decreases.

In order to solve this disadvantage, Korean Laid-Open Patent Publication No. 2005-29012 discloses the invention of injection molding the polymer housing integrally with the arrester module. The integrated polymer arrester in which the lightning arrester module and the polymer housing are integrally injected, assembles the stud bolt to the knuckle of the arrester module, compresses it by applying pressure to the outside of the knuckle, and fixes the stud bolt. Then, by inserting the arrester module into the injection mold and injecting the silicone rubber, as the silicone rubber surrounds the arrester module, the arrester module is completely blocked from the outside. In addition, the adhesive is applied to the outside of the arrester module to maintain the adhesion between the arrester module and the polymer housing by injection vulcanization. As a result, the cause of moisture absorption is eliminated, thereby maintaining excellent airtightness, and reducing cost and workability by reducing the number of components.

However, the lightning arrester having the magnetic housing and the arrester having the polymer housing which are currently used have the following problems. That is, it is inconvenient to connect the lowering wire because it is necessary to tighten the screws when connecting the upper metal body and the lowering wire, and the lightning arrester head is unstable by attaching the insulation cover. It causes workers' safety accidents.

In order to solve this disadvantage, Korean Laid-Open Patent Publication No. 1999-15786 installs a connector having an insertion hole formed at one end of a poly housing, and connects one end of an incoming cable to the insertion hole and connects it. Then, the rubber mold cone is mounted to surround the coupling portion of the polymer housing, the connector and the incoming cable. However, since the rubber mold cone is not integrally injected with the polymer housing, the connector, and the lead cable, airtightness is difficult to be maintained. Therefore, if the airtightness is lowered, there is room for electric accidents due to moisture absorption. In addition, as the number of parts increases, there is a disadvantage that the cost increases and the assembly work is cumbersome.

It is an object of the present invention to provide a lead wire-attached polymer lightning arrester which can easily connect a reduction wire and improve airtightness, thereby preventing electric system failure and safety accidents of an operator.

The structure of the present invention for achieving the object as described above, an arrester module including an element formed of zinc oxide, and an aluminum electrode coupled to both ends of the element; A connection electrode coupled to one end of the aluminum electrode and connecting the lowering wire and the aluminum electrode; And a housing that is injection molded to surround one end of the cut-out wire and the arrester module.

The connection electrode may include a head having a wire connection groove into which the cutting wire is inserted, a body tapered to gradually increase in diameter from the head, and a coupling pole protruding from an end of the body and coupled to the aluminum electrode. It is preferable to include.

An wire receiving groove having a diameter larger than the wire connecting groove may be formed at an inlet side of the head in which the wire connecting groove is formed.

A tin layer made of tin of a predetermined thickness may be formed inside the wire connection groove.

The body may have a notched groove notched along the circumferential direction.

The lead wire-attached polymer arrester according to the present invention, as the lowering wire is made integrally to the polymer arrester, it is not necessary to perform a process for connecting the lowering wire separately, it becomes easy to install the polymer arrester. In addition, as the covering of the reducing wire and the polymer housing are made of the same series of silicone rubber, the insulation of the cutting wire and the polymer housing is maintained at the injection of the polymer housing, and the insulation area is extended to the cutting wire area, thereby improving insulation performance. do. In addition, since the charging unit is not exposed to the outside, it is possible to prevent safety accidents due to contact of the human body or failure due to birds.

The present invention as described above will be described in more detail based on the accompanying drawings.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users or operators, and accordingly, the meaning of each term should be interpreted based on the contents throughout the present specification. will be.

1 is a front view of the polymer arrester according to the present invention, Figure 2 is a cross-sectional view of FIG.

The polymer arrester 1 includes a lightning arrester module 10, a polymer housing 5, a wire for reduction 30, a connection electrode 20, and an arrester cover 40.

The arrester module 10 includes an element 11, an aluminum electrode 13, a synthetic resin film 15, and a reinforcing fiber 17.

The element 11 is formed by combining a plurality of zinc oxide elements formed of zinc oxide (ZnO) in the longitudinal direction.

The aluminum electrodes 13 are respectively coupled to both ends of the element 11 and are made of aluminum. Hereinafter, reference numeral 13 denotes an aluminum electrode. On both ends of the aluminum electrode 13, which are not in contact with the element 11, the coupling groove 14 for connecting the wire or the device coupled to the polymer arrester 1 is recessed.

The synthetic resin film 15 may use a heat resistant polypropylene film, and is mounted to surround the outer circumferential surface of the entire region of the element 11 and a partial region of the aluminum electrode 13. The synthetic resin film 15 prevents the epoxy resin in the subsequent process from seeping into the element 11 and allows the silicone rubber forming the housing 5 to withstand the curing temperature at the time of integral injection.

The reinforcing fiber 17 is made of glass fiber and epoxy resin, is mounted to surround the outer surface of the synthetic resin film 15, and the outer surface of the reinforcing fiber 17 is wound in a diamond shape.

The connection electrode 20 is coupled to one or both ends of the arrester module 10 and is used to connect the arrester module 10 and the lowering wire 30.

As shown in FIGS. 3 and 4, the connection electrode 20 has a head 21, a body 25, a coupling pole 27, and a head 21, a body 25, and a coupling pole 27. ) Is manufactured integrally using aluminum.

The head 21 is formed in a hexagonal column shape, a circular wire coupling groove 22 is formed in the central region of the head 21 to which the conductor portion of the lowering wire 30 is coupled. And the inlet side of the wire coupling groove 22 has a wider diameter than the wire coupling groove 22, the wire receiving groove 24 is formed to accommodate the cover of the reduction wire 30 is formed.

On the other hand, since the connection electrode 20 is made of aluminum and the conductor 35 portion of the lowering wire 30 is made of copper, corrosion may occur due to contact of dissimilar metals. In order to prevent this, a tin layer 23 having a predetermined thickness is formed on the inner wall surface of the wire coupling groove 22. The tin layer 23 is formed by dissolving tin and injecting it into the wire coupling groove 22 and then using a reprocessing method to remove a portion except tin of a desired thickness.

The body 25 is tapered so that its diameter increases as it moves away from the head 21, and is formed in a truncated cone shape. The notch groove 26 is formed in the body 25 along the circumferential direction in an area adjacent to the head 21, and the silicone rubber is introduced into the notch groove 26 when the polymer housing 5 is injected. It will improve the adhesion with).

The coupling pole 27 protrudes from a surface opposite to the head 21 of the body 25 and is inserted into the coupling groove 14 of the aluminum electrode 13 so that the connection electrode 20 is connected to the aluminum electrode 13. To be combined.

The lowering wire 30 is a wire used to connect to the primary side of the column transformer in high and special high-voltage overhead lines, and the conductor 35 part is made of copper, and the covering 31 is made of the high molecular housing 5. It is manufactured using synthetic rubber of the same series.

The polymer housing 5 is made of a polymer polymer and is injection molded to surround a part of the element 11, the aluminum electrode 13, the connection electrode 20, and the lowering wire 30. At this time, since the coating 31 of the lowering wire 30 is made of synthetic rubber of the same series as the polymer housing 5, the polymer housing 5 and the lowering wire 30 during injection molding of the polymer housing 5. ) Is completely glued.

On the other hand, the arrester cover 40 is coupled to one end that is not coupled to the lowering wire 30 of the polymer arrester 1, the blocking plate 41 for blocking one end surface of the polymer arrester 1, the blocking plate A rib 45 is bent from 41 to surround the outer circumferential surface of the polymer housing 5. The arrester cover 40 is made of stainless steel, and induces leakage current toward the disconnector, thereby improving the insulation characteristics of the insulation hanger.

Looking at the manufacturing process of the polymer arrester (1) by such a configuration as follows.

The plurality of zinc oxide devices 11 are connected to fabricate the device 11, and the aluminum electrodes 13 are coupled to both ends of the device 11. A part of the element 11 and the aluminum electrode 13 are wrapped with the synthetic resin film 15, and the outer surface of the synthetic resin film 15 is wrapped with the reinforcing fiber 17 to be treated.

Then, the connection electrode 20 is coupled to one end of the aluminum electrode 13. At this time, the coupling pole 27 of the connection electrode 20 is coupled by applying a predetermined pressure or more to be pressed into the coupling groove 14 of the aluminum electrode 13.

When the coupling of the connection electrode 20 is completed, the cover 31 of one end of the lowering wire 30 is removed by the length of the wire coupling groove 22, and then the conductor 35 of the lowering wire 30 is connected. The conductor 35 of the cutting wire 30 is pressed into the wire coupling groove 22 by pressing the wire coupling groove 22 of the electrode 20. At this time, the wire receiving groove 24 is accommodated in the end of the reduction wire 30 is coated with a coating (31).

When the lowering wire 30 is coupled to the connection electrode 20 in this way, in order to form the polymer housing 5 on the outside of the arrester module 10 on which the lowering wire 30 is mounted, the lightning arrester module ( 10) and then the polymer housing 5 is vacuum injection molded.

When injection molding is completed, the arrester cover 40 is mounted on one end of the polymer arrester 1 to complete the assembly of the polymer arrester 1.

1 is a front view of the polymer arrester according to the present invention,

2 is a cross-sectional view of FIG.

3 is a partial side cross-sectional view of the connection electrode of FIG.

4 is a plan view of the connection electrode of FIG. 4.

Description of the Related Art

 1: Lightning arrester 10: Lightning arrester module

11 element 13 aluminum electrode

14: bonding groove 15: synthetic resin film

17: reinforcing fiber 20: connecting electrode

21: head 25: body

27: coupling pole 30: cutting wire

Claims (5)

An arrester module including an element formed of zinc oxide and an aluminum electrode coupled to both ends of the element; A connection electrode coupled to one end of the aluminum electrode and connecting the lowering wire and the aluminum electrode; And a housing that is injection molded to surround one end of the reduction wire and the arrester module, The connection electrode may include a head having a wire connection groove into which the cutting wire is inserted, a body formed to be tapered as the diameter thereof increases away from the head, and a protrusion formed at an end of the body and coupled to the aluminum electrode. A lead wire-attached polymer lightning arrestor comprising a pole. delete The method of claim 1, Lead wire-attached polymer lightning arrester, characterized in that the wire receiving groove having a diameter larger than the wire connecting groove is formed on the inlet side of the head is formed with the wire connecting groove. The method of claim 1, Lead wire-attached polymer lightning arrester, characterized in that the tin layer is formed in the interior of the wire connection groove. The method of claim 1, Lead body-attached polymer arrester, characterized in that the body is formed notched groove notched along the circumferential direction.

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