CN201796666U

CN201796666U - Detachable metal armored arrester

Info

Publication number: CN201796666U
Application number: CN2010205240070U
Authority: CN
Inventors: 郭道林
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-07
Filing date: 2010-09-07
Publication date: 2011-04-13
Anticipated expiration: 2020-09-07

Abstract

The utility model discloses a detachable metal armored arrester. The detachable metal armored arrester comprises a plurality of zinc oxide piezoresistor valve blocks, wherein the plurality of zinc oxide piezoresistor valve blocks are welded with one another end to end to form a whole through metals; the upper ends and the lower ends of the plurality of zinc oxide piezoresistor valve blocks are welded with metal electrodes respectively to form an upper electrode and a lower electrode respectively; the upper electrode, the lower electrode and the plurality of zinc oxide piezoresistor valve blocks form a core body; the core body is wrapped by an insulation sleeve and a metal shell sequentially; a plug is arranged on the end part of the metal shell; the plug is connected with the upper electrode through a connecting rod; the bottom of the lower electrode is connected with an earthing bolt and is led out; and an explosion-proof flange is arranged at the bottom of the metal shell to form an explosion-proof channel. The detachable metal armored arrester has a simple structure; the core body can be pulled out at any time without moving the plug; parameters and performance of the arrester are detected conveniently or the core body is replaced conveniently; the detachable metal armored arrester is simple in operation and low in maintenance costs; and the defect that the conventional arrester must be tested and replaced integrally is overcome.

Description

Detachable metal armouring formula lightning arrester

Technical field

The utility model relates to overvoltage protection and uses the lightning arrester field, is specifically related to the lightning arrester that a kind of core body is detachable, shell is metal armouring, plug-in is installed.

Background technology

Generally be used at present the plug-in lightning arrester in the gas-filled type device for switching equipment, all be to adopt earlier the ZnO varistor valve block to be made as core body earlier, again core body directly is pressed in the manufacturing process in the silicon rubber, the positioning difficulty of this technology core body in mould is bigger, most situations all can have certain deviation, for avoiding that product quality is impacted, when the design of outer insulating material, need be reserved with bigger allowance, cause small product size bigger, not only cost is higher, and is unfavorable for the developing direction of modern electric miniaturization, also has following inconvenience simultaneously:

1), the difficult calibration of the valve block concentricity in the core body, even the concentricity of valve block is fine when core body is made, but when cast silicon rubber, because of die pressure is very big, it is very high that the probability that is offset takes place core body, as deviation occurs, then has a strong impact on the same flow of entire product.

2), when cast silicon rubber, very big to the influence of core body valve block, damage if at this moment valve block takes place, detection difficulty is bigger, is difficult to be found, even be detected, because of not doing over again, causes waste.

3), the valve block in the core body is superimposed, the connection between the valve block is that the aluminium electrode by the valve block surface connects naturally, contact resistance is bigger.

4), product is at normal operation period, detects inconveniently, maintenance cost is very high.

5), a certain parts of product go wrong, must whole replacement of products, can't keep in repair, cost is very high, also is unfavorable for accident analysis simultaneously.

The utility model content

The purpose of this utility model is to solve the deficiencies in the prior art, provides a kind of core body middle valve plate to adopt metal solder, Whole-dismountable, and working service is convenient, and cost is low, the plug-in lightning arrester of metal armouring.

The technical solution of the utility model is as follows:

A kind of detachable metal armouring formula lightning arrester, include many zinc oxide varistor valves, it is characterized in that: described many zinc oxide varistor valves are welded as a whole from beginning to end by metal, the upper and lower end of described many zinc oxide varistor valves is welded with metal electrode respectively, and constituting upper and lower electrode respectively, described upper and lower electrode constitutes core body with described many zinc oxide varistor valves; Described core body is coated with insulating case and metal shell outward successively, and the end of described metal shell is equipped with unplugg, links to each other by connecting rod between described unplugg and the described top electrode; The bottom of described bottom electrode is connected with earth stud and draws, and the bottom of described metal shell is equipped with explosion-proof flange and constitutes explosion-proof passage.

Described detachable metal armouring formula lightning arrester, it is characterized in that: described unplugg links to each other with electrical network by lead.

Described detachable metal armouring formula lightning arrester is characterized in that: it is raw material that described insulating case adopts well behaved composite silicone rubber, by the high temperature injection extrusion forming; Described metal shell adopts electric conductivity good metal copper or aluminium to process.

Core body of the present utility model is made up of Zinc-oxide piezoresistor, between each resistor valve sheet, adopt metal solder to arrive together, simultaneously weld metal electrode respectively at the upper and lower end of core body valve block, the core body that welding is good must guarantee that valve block and electrode are on same axis, should measure the longitudinal electrical resistance of solder side simultaneously, it should satisfy the specification requirement of lightning arrester.Guaranteed the concentricity of valve block on the one hand, made the not loss of discharge capacity of lightning arrester, reduced the contact resistance between valve block on the other hand, made the defencive function of lightning arrester excellent more.The core body that welding is good inserts in the silicon rubber insulation overcoat together with connecting rod, outside silicon rubber insulation, put again and install the metal armouring housing, in the upper end of connecting rod connect-disconnect plug is installed then, install explosion-proof flange in bottom of the present utility model, to guarantee to form good explosion-proof passage.

The beneficial effects of the utility model:

The utility model is simple in structure, under the motionless situation of connect-disconnect plug, can at any time core body be extracted, parameter and performance to lightning arrester detect or change core body, simple to operate, maintenance cost is lower, has avoided present lightning arrester must put in order the drawback that bench teat is tested and changed.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is a core schematic diagram of the present utility model.

Embodiment

Referring to Fig. 1,2, a kind of detachable metal armouring formula lightning arrester, include many zinc oxide varistor valves 10, many zinc oxide varistor valves 10 are welded as a whole by metal 11 head and the tail, and the upper and lower end of many zinc oxide varistor valves 10 is welded with metal electrode respectively, and constitutes upper and lower electrode 3,7 respectively, upper and lower electrode 3,7 need carry out good electric field structure design, the surface should be smooth, and electric conductivity needs good, will guarantee certain mechanical strength simultaneously;

Upper and lower electrode 3,7 constitutes core body 6 with many zinc oxide varistor valves 10, core body 6 outer silicon rubber insulation cover 5 and the metal shells 4 of being coated with successively, it is raw material that silicon rubber insulation cover 5 adopts well behaved composite silicone rubber, the high temperature injection extrusion forming, metal shell 4 adopts electric conductivity good metal copper or aluminium to process;

The end of metal shell 4 is equipped with unplugg 1, and unplugg 1 links to each other with electrical network by lead, links to each other by connecting rod 2 between unplugg 1 and the top electrode 3;

The bottom of bottom electrode 7 is connected with earth stud 9 and draws, and the bottom of metal shell 4 is equipped with the good nonmetal explosion-proof flange 8 of sealing and constitutes explosion-proof passage.

Referring to Fig. 2, weld one by one by metal 11 between many zinc oxide varistor valves 10 and with upper and lower electrode, it is become one, the common core body 6 of forming, the core body 6 that welding is good has very strong mechanical strength, it has good concentricity and extremely low contact resistance, and the good of lightning arrester effectively guaranteed, can guarantee that core body 6 can integral demounting simultaneously.

The core body of making 6 inserts in the silicon rubber insulation overcoat 5 together with connecting rod 2, outside at insulating coating 5 is installed metal shell 4 again, install explosion-proof flange 8 in the bottom of metal shell 4 again and constitute explosion-proof passage, in the bottom of metal shell 4 earth stud 9 made of copper is installed, the entire product manufacturing is finished.

Claims

1. detachable metal armouring formula lightning arrester, include many zinc oxide varistor valves, it is characterized in that: described many zinc oxide varistor valves are welded as a whole from beginning to end by metal, the upper and lower end of described many zinc oxide varistor valves is welded with metal electrode respectively, and constituting upper and lower electrode respectively, described upper and lower electrode constitutes core body with described many zinc oxide varistor valves; Described core body is coated with insulating case and metal shell outward successively, and the end of described metal shell is equipped with unplugg, links to each other by connecting rod between described unplugg and the described top electrode; The bottom of described bottom electrode is connected with earth stud and draws, and the bottom of described metal shell is equipped with explosion-proof flange and constitutes explosion-proof passage.

2. detachable metal armouring formula lightning arrester according to claim 1, it is characterized in that: described unplugg links to each other with electrical network by lead.

3. detachable metal armouring formula lightning arrester according to claim 1 is characterized in that: it is raw material that described insulating case adopts well behaved composite silicone rubber, by the high temperature injection extrusion forming; Described metal shell adopts electric conductivity good metal copper or aluminium to process.