CN201478689U

CN201478689U - Lighting-protection device for electric railway traction power supply system

Info

Publication number: CN201478689U
Application number: CN2009202244128U
Authority: CN
Inventors: 尹彬
Original assignee: SHANDONG XUNSHI ELECTRIC CO Ltd
Current assignee: SHANDONG XUNSHI ELECTRIC CO Ltd; ZIBO YIYUAN ELECTRIC POWER TECHNOLOGY Co Ltd; China Electric Power Research Institute Co Ltd CEPRI; China Railway Electrification Engineering Group Co Ltd; China Railway Electrification Survey Design and Research Institute Co Ltd
Priority date: 2009-08-25
Filing date: 2009-08-25
Publication date: 2010-05-19
Anticipated expiration: 2019-08-25

Abstract

The utility model discloses a lighting-protection device for protecting an alternative current electric railway traction power supply system, which comprises an upright post. A wrist-arm insulator is fixedly arranged on the upright post, a high-voltage side of the wrist-arm insulator is connected with the power supply system, and a low-voltage side of the wrist-arm insulator is connected with the upright post. The device is characterized in that hoop components are respectively arranged at two ends of the wrist-arm insulator, lighting arrester bodies are symmetrically arranged on the upper portions of two groups of the hoop components, horn electrodes are symmetrically arranged on the upper portions of the lighting arrester bodies, an air gap is formed between two horn electrodes, and the horn electrodes adopt stainless steel materials. The device has convenient installation, high reliability and capability of effectively preventing the insulator from flashover puncture owing to good anticorrosion and electric arc ablation resistance of the horn electrodes and protecting safe running of the railway traction power supply system.

Description

Lightning prevention device for electric railway traction power supply system

Technical field

The utility model relates to electric railway traction power supply system, relates in particular to a kind of lightning prevention device for electric railway traction power supply system, and it is particularly suitable for using on the 27.5KV electrification railway contact net.

Background technology

The development of China's electric railway in recent years is very fast, going into operation of the electrification innovation of old circuit, the operation of Line for Passenger Transportation, Beijing-Shanghai express railway, all the reliability of tractive power supply system is had higher requirement, there are the following problems and existing railway is with arrester device:

1. owing to bear system voltage, easily aging, reliability is not high, and is difficult in maintenance with arrester without gaps for railway;

2. its electrode that constitutes the gap adopts ordinary low-carbon steel, the anticorrosion and scarce capacity of anti-the ablation to the railway of band series gap with lightning arrester.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of convenient for installation and maintenance, lightning prevention device for electric railway traction power supply system that reliability is high of being used for alternating current gasification railway traction power supply system that overcomes the above-mentioned defective of prior art is provided.

The technical scheme that the utility model adopted is: lightning prevention device for electric railway traction power supply system, comprise and be provided with column 1, be set with bracket insulator 2 on the column 1, the high-pressure side of bracket insulator 2 and electric power system connect, the low-pressure side of bracket insulator 2 and column connect, it is characterized in that: the two ends at bracket insulator 2 are provided with anchor ear assembly 3 respectively, two groups of anchor ear assembly 3 tops are symmetrical arranged lightning arrester body 4 respectively, two lightning arrester body 4 tops are symmetrical arranged respectively and constitute air gap 6 between 5, two goat's horn electrodes 5 of goat's horn electrode.

Wherein preferred version is:

Described anchor ear assembly 3 comprises supporting bracket 7, goes up anchor ear 8 and following anchor ear 9, anchor ear 8 tops are fixed in supporting bracket 7 bottoms, last anchor ear 8 is fixed on the bracket insulator 2 by bolt 10, nut 13 respectively with following anchor ear 9 two ends, described goat's horn electrode 5 is fixed on lightning arrester body 4 tops by top board 16, lower platen 17, and described lightning arrester body 4 bottoms are fixed on supporting bracket 7 tops by hexagon socket head cap screw 15;

Described goat's horn electrode 5 adopts stainless steel material.

Lightning prevention device for electric railway traction power supply system of the present utility model has characteristics such as good economy performance, easy for installation, reliability height, particularly, shows the following aspects: (1) is easy for installation, reliability is high, easy to maintenance; (2) the goat's horn electrode adopts stainless steel material, and is anticorrosion better with the arc ablation resistance ability; (3) air gap distance of goat's horn electrode can be adjusted, and can cooperate the bracket insulator of different insulative distance, and applicability is strong.

Description of drawings

Fig. 1 is total mounting structure schematic diagram of the present utility model;

Fig. 2 is an anchor ear modular construction schematic diagram of the present utility model;

Fig. 3 is a lightning arrester body structural representation of the present utility model;

Fig. 4 is the connected mode schematic diagram of the utility model goat's horn electrode and upper and lower pressing plate;

Fig. 5 is the structural representation of upper and lower pressing plate of the present utility model;

Among the figure: 9 times anchor ears of anchor ear, 10 bolts, 11 plain washers, 12 spring washers, 13 nuts, 14 stainless steel covers, 15 hexagon socket head cap screws, 16 top boards, 17 lower platens on 7 supporting brackets 8 of 1 column, 2 bracket insulators, 3 anchor ear assemblies, 4 lightning arrester bodies, 5 goat's horn electrodes, 6 air gaps

Embodiment

Specifically describe embodiment of the present utility model below with reference to accompanying drawing.

Be described with reference to Figure 1 concrete mounting structure of the present utility model, it mainly comprises column 1, bracket insulator 2, anchor ear assembly 3, lightning arrester body 4, goat's horn electrode 5 and air gap 6, horizontal direction is set with bracket insulator 2 on the metal upright post 1 of good earth, in the middle of the bracket insulator 2 is insulated part, both sides are fixed with the steel cap, the low-pressure side steel cap of bracket insulator 2 is by connecting gold utensil and column UNICOM, and bracket insulator 2 high-pressure side steel caps are by connecting gold utensil and UNICOM of railway power supply system; Wherein, the high-pressure side of bracket insulator 2 and low-pressure side two ends are provided with anchor ear assembly 3 respectively, two groups of anchor ear assemblies 3 are held tightly on the steel cap of the two ends of bracket insulator 2, the top of two groups of anchor ear assemblies 3 is symmetrical arranged lightning arrester body 4 respectively, two lightning arrester body 4 tops are symmetrical arranged respectively and constitute air gap 6 between 5, two goat's horn electrodes 5 of goat's horn electrode.

Shown in Fig. 2～3, anchor ear assembly 3 comprises supporting bracket 7, goes up anchor ear 8 and following anchor ear 9; Lightning arrester body 4 adopts known metal oxide arrester frame mode, include zinc oxide component, there are stainless steel cover 14 and hexagon socket head cap screw 15 in the lower end, and lightning arrester body 4 is arranged at supporting bracket 7 tops by hexagon socket head cap screw 15, and anchor ear 8 tops are fixed in welding manner in supporting bracket 7 bottoms; Last anchor ear 8 with following anchor ear 9 be about semi-circular structure, fixedly hold tightly on the column steel cap of the two ends of bracket insulator 2 by bolt 10, nut 13, spring washer 12 and plain washer 11 respectively at two ends, and its connection should guarantee that two lightning arrester bodies 4 have the through-flow property of favorable conductive with the ground connection column 1 of bracket insulator 2 low-pressure sides and on high-tension side railway power supply system respectively through the anchor ear assembly 3 of lower end.

Shown in Fig. 4～5, goat's horn electrode 5 adopts " " shape bar electrode, two goat's horn electrodes, 5 positioned opposite make goat's horn upwards, its horizontal tail is fixed on two lightning arrester bodies, 4 tops by top board 16 and lower platen 17 respectively, the insulation distance different according to bracket insulator 2, can be by adjusting goat's horn electrode 5 and top board 16, the relative position of lower platen 17, change the distance of air gap 6, guarantee that lightning discharge occurs between this air gap, goat's horn electrode 5 is selected stainless steel material for use in addition, can effectively solve the anticorrosion problem of ordinary metallic material, improve the anticorrosion and anti-ablation ability of electrode.

Top board 16 is a rectangular configuration, circular lower platen 17 is connected with the stainless steel cover of lightning arrester body 4 upper ends, top board 16 and lower platen 17 compress up and down on back and the goat's horn electrode 5 contacted surfaces, be respectively arranged with the groove that is complementary with goat's horn electrode 5 section radius, play the fixedly effect of goat's horn electrode 5, all be equipped with installing hole on top board 16 and the lower platen 17, be installed in the lightning arrester upper end by bolt.

Operation principle of the present utility model and process: when tractive power supply system normally moves, air gap shielding system voltage constitutes the protection gap, and lightning arrester body does not bear voltage, need not consider the problem of aging under the long-time running voltage, improve its reliability greatly, reduced maintenance cost; When tractive power supply system is struck by lightning, thunder and lightning causes tractive power supply system to produce overvoltage, under the lightning overvoltage effect, air gap between the goat's horn electrode is breakdown, lightning arrester presents Low ESR, lightning current is released into ground through the discharge channel that bracket insulator high-pressure side lightning arrester, air gap, bracket insulator low-pressure side lightning arrester, column or earth connection are constituted, and bears arc erosion by the goat's horn electrode; After the lightning impulse; power-frequency voltage is loaded on the lightning arrester body; the resistance moment change of lightning arrester body is big; the electric current that passes through is that arc current is suppressed in low numerical value; the air gap arc drop increases, and the insulation of air gap recovers rapidly, and electric arc extinguishes in the short time naturally at the utmost point; power frequency continued flow is interdicted fully, thereby realizes the purpose of protection tractive power supply system.

Claims

1. lightning prevention device for electric railway traction power supply system, comprise and be provided with column (1), be set with bracket insulator (2) on the column (1), the high-pressure side of bracket insulator (2) and electric power system connect, the low-pressure side of bracket insulator (2) and column connect, it is characterized in that: anchor ear assembly (3) is set respectively at the two ends of bracket insulator (2), two groups of anchor ear assemblies (3) top is symmetrical arranged lightning arrester body (4) respectively, two lightning arrester bodies (4) top is symmetrical arranged goat's horn electrode (5) respectively, constitutes air gap (6) between two goat's horn electrodes (5).

2. lightning prevention device for electric railway traction power supply system according to claim 1, it is characterized in that: described anchor ear assembly (3) comprises supporting bracket (7), last anchor ear (8) and following anchor ear (9), anchor ear (8) top is fixed in supporting bracket (7) bottom, last anchor ear (8) passes through bolt (10) respectively with following anchor ear (9) two ends, nut (13) is fixed on the bracket insulator (2), described goat's horn electrode (5) is by top board (16), lower platen (17) is fixed on lightning arrester body (4) top, and described lightning arrester body (4) bottom is fixed on supporting bracket (7) top by hexagon socket head cap screw (15).

3. lightning prevention device for electric railway traction power supply system according to claim 1 and 2 is characterized in that: described goat's horn electrode (5) adopts stainless steel material.