CN202737423U - Lightening arrester for electric railway traction power supply system - Google Patents
Lightening arrester for electric railway traction power supply system Download PDFInfo
- Publication number
- CN202737423U CN202737423U CN 201220368902 CN201220368902U CN202737423U CN 202737423 U CN202737423 U CN 202737423U CN 201220368902 CN201220368902 CN 201220368902 CN 201220368902 U CN201220368902 U CN 201220368902U CN 202737423 U CN202737423 U CN 202737423U
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- CN
- China
- Prior art keywords
- power supply
- supply system
- lightning
- lightning arrester
- electric railway
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a lightening protection device for an electric railway traction power supply system. The Lightening protection device for an electric railway traction power supply system comprises an upright column, wherein a wrist and arm insulator is fixedly arranged on the upright column; the high-voltage side of the wrist and arm insulator is connected with the power supply system, and the low-voltage side is connected with the upright column. The lightning protection device is characterized in that both ends of the wrist and arm insulator are respectively provided with a hoop assembly; the upper parts of the two hoop assemblies are respectively symmetrically provided with a lightning arrester body; the upper parts of the two lightning arrester bodies are respectively symmetrically provided with a bar-shaped electrode; and an air clearance is formed between the two bar-shaped electrodes. The lightening protection device is convenient for installation and use and is firm in installation, and can effectively prevent safety hazards during the operation of a railway.
Description
Technical field
The utility model relates to a kind of lightning prevention device for electric railway traction power supply system.
Background technology
Railway is the main artery of China's economic development, and electric railway is the important component part of railway transportation.In recent years, China's electric railway development was very fast, and the operation that is open to traffic of the electrification innovation of old circuit, the operation of Line for Passenger Transportation, Beijing-Shanghai express railway is all had higher requirement to the reliability of tractive power supply system.The safe operation of high ferro is very important, the Lightning Protection of high railway traction contact line conducting wire seems more and more important, but the existing arrester for electrified railway traction power supply system of present China, its mounting structure is insecure, fastening torque of bolt is little, has potential safety hazard in railway operation.
The utility model content
According to above deficiency of the prior art, the technical problems to be solved in the utility model is: a kind of lightning prevention device for electric railway traction power supply system is provided, and it is easy to install, and installs firmly, can effectively avoid the potential safety hazard of railway operation.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of lightning prevention device for electric railway traction power supply system, include column, be fixedly installed bracket insulator on the column, the high-pressure side of bracket insulator and electric power system connect, the low-pressure side of bracket insulator and column connect, it is characterized in that: arrange respectively at the two ends of bracket insulator and embrace ring assemblies, embrace ring assemblies top for two groups and be symmetrical arranged respectively lightning arrester body, two lightning arrester body tops are symmetrical arranged respectively the clavate electrode, consist of the air gap between two clavate electrodes.
Described armful of ring assemblies comprises embraces ring, U bolt and pressing plate, and U bolt is stuck in to be embraced in the ring groove, embraces ring and is fixed on the bracket insulator by U bolt, nut respectively with the pressing plate two ends.
Described clavate electrode is marked closely by two stainless steels and is fixed on the lightning arrester body.
The lightning arrester body bottom is fixed on the pressing plate top by hexagon socket head cap screw.
The beneficial effect that the utility model has is: have good economy performance, easy for installation, reliability high, particularly, show the following aspects:
(1) according to the characteristic of electrification railway contact net insulator, lightning arrester is designed to two body symmetrical structures, two lightning arresters are installed in respectively on the upper and lower gold utensil of insulator, and the clavate electrode is drawn in the lightning arrester body upper end, are the series connection air gap between two clavate electrodes.The design of two body symmetrical expressions is convenient installs, and lightning arrester is stressed evenly, and is comparatively attractive in appearance.
(2) consist of the air gap between the electrode bar of lightning arrester upper end, adjust the distance of air gap by research, can guarantee that this air gap can tolerate system's power-frequency voltage and superpotential while of part operation, lightning discharge occurs between this air gap.And can by the different lightning arrester of configuration clearance distance, be applicable to the insulator of different model.
(3) has solid and reliable syndeton.Wherein, fastening nuts moment reaches 44N.m, and has the measure of becoming flexible of preventing.Embracing ring can accurately locate, and can prevent that U bolt from coming off.
When (4) normally moving in system, bear system voltage by the air gap, lightning arrester does not bear system voltage, has increased reliability, has reduced maintenance cost.
(5) electrode bar adopts the aluminium bar material, has good Corrosion Protection.
Description of drawings
Fig. 1 is the utility model overall installation structural representation;
Fig. 2 is that the utility model is embraced the ring assemblies schematic diagram;
Among the figure: 1, column; 2, bracket insulator; 3, embrace ring assemblies; 4, lightning arrester body; 5, clavate electrode; 6, air gap; 7, embrace ring; 8, U bolt; 9, pressing plate.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
Lightning prevention device for electric railway traction power supply system as shown in Figure 1, comprise and be provided with column 1, be fixedly installed 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: arrange respectively at the two ends of bracket insulator 2 and embrace ring assemblies 3, embrace ring assemblies 3 tops for two groups and be symmetrical arranged respectively lightning arrester body 4, two lightning arrester body 4 tops are symmetrical arranged respectively and consist of air gap 6 between 5, two clavate electrodes 5 of clavate electrode.
Embrace ring assemblies and comprise and embrace ring 7, U bolt 8 and pressing plate 9, U bolt 8 is stuck in to be embraced in ring 7 grooves, embraces ring 7 and is fixed on the bracket insulator 2 by U bolt 8, nut respectively with pressing plate 9 two ends.Clavate electrode 5 is marked closely by two stainless steels and is fixed on the lightning arrester body 4, can effectively prevent clavate electrode 5 rotation displacements.Lightning arrester body 4 bottoms are fixed on pressing plate 9 tops by hexagon socket head cap screw, and are fixing more firm.
Operation principle of the present utility model and process: when traction net electric power system is normally moved, air gap shielding system voltage consists of the protection gap, and lightning arrester body does not bear voltage, need not consider the problem of aging under the long-time running voltage, greatly improve its reliability, 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 clavate 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 consist of, and bears arc erosion by the clavate electrode; After the lightning impulse; power-frequency voltage is loaded on the lightning arrester body; the resistance moment change of lightning arrester body is large; 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 (4)
1. lightning prevention device for electric railway traction power supply system, include column, be fixedly installed bracket insulator on the column, the high-pressure side of bracket insulator and electric power system connect, the low-pressure side of bracket insulator and column connect, and it is characterized in that: arrange respectively at the two ends of bracket insulator and embrace ring assemblies, embrace ring assemblies top for two groups and be symmetrical arranged respectively lightning arrester body, two lightning arrester body tops are symmetrical arranged respectively the clavate electrode, consist of the air gap between two clavate electrodes.
2. lightning prevention device for electric railway traction power supply system according to claim 1, it is characterized in that, described armful of ring assemblies comprises embraces ring, U bolt and pressing plate, U bolt is stuck in to be embraced in the ring groove, embraces ring and is fixed on the bracket insulator by U bolt, nut respectively with the pressing plate two ends.
3. lightning prevention device for electric railway traction power supply system according to claim 1 is characterized in that, described clavate electrode is marked closely by two stainless steels and is fixed on the lightning arrester body.
4. lightning prevention device for electric railway traction power supply system according to claim 1 is characterized in that, the lightning arrester body bottom is fixed on the pressing plate top by hexagon socket head cap screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220368902 CN202737423U (en) | 2012-07-27 | 2012-07-27 | Lightening arrester for electric railway traction power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220368902 CN202737423U (en) | 2012-07-27 | 2012-07-27 | Lightening arrester for electric railway traction power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202737423U true CN202737423U (en) | 2013-02-13 |
Family
ID=47663085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220368902 Expired - Lifetime CN202737423U (en) | 2012-07-27 | 2012-07-27 | Lightening arrester for electric railway traction power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202737423U (en) |
-
2012
- 2012-07-27 CN CN 201220368902 patent/CN202737423U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |
|
| CX01 | Expiry of patent term |