CN202712686U - Low voltage valve type lightning arrester - Google Patents
Low voltage valve type lightning arrester Download PDFInfo
- Publication number
- CN202712686U CN202712686U CN 201220316355 CN201220316355U CN202712686U CN 202712686 U CN202712686 U CN 202712686U CN 201220316355 CN201220316355 CN 201220316355 CN 201220316355 U CN201220316355 U CN 201220316355U CN 202712686 U CN202712686 U CN 202712686U
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- spark gap
- valve block
- bracing frame
- valve type
- terminals
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Abstract
The utility model discloses a low voltage valve type lightning arrester. One end of a ceramic tube is provided with an upper connecting terminal, and the other end is provided with a lower connecting terminal. A spring, a power frequency current blocking structure and a valve block are disposed in the ceramic tube. The power frequency current blocking structure is constituted by a supporting rack, a plurality of spark gap sheets, and mica gaskets. Each of the mica gaskets is disposed between each two adjacent spark gap sheets, the spark gap sheets and the mica gaskets are disposed in the supporting rack. An upper end of the supporting rack is connected with the upper connecting terminal by the spring, and the lower end of the supporting rack is contacted with the valve block, which is connected with the lower connecting terminal. By reinforcing the spark gap sheets and the mica gaskets, the loosening and the shedding of the spark gap sheets and the mica gaskets can be prevented, even under the impact of the large current.
Description
Technical field
This practicality relates to the lightning arrester in the electric power system, is specifically related to a kind of low pressure valve type arrester.
Background technology
The valve lightning arrester of prior art mainly contains wire clamp, insulator, spring, spark gap sheet, mica washer, porcelain tube, valve, valve block composition.Its course of work is: when lightning arrester is in normal operating condition in system, and valve and the charged high-voltage conducting wires of the gap isolation lightning arrester that mica washer and spark gap sheet consist of.When overvoltage occurring, and when reaching the one magnitude of voltage, discharging gap discharges immediately.Power frequency continued flow also will be along with flowing into the earth simultaneously.After having served as loss of voltage, discharging gap guarantees when first partly lets slip zero arc extinction to be cut off continuous Shen, makes system recover normal operating conditions.Avoid effect although this lightning arrester can play, because its inner spark gap sheet and mica washer and porcelain tube are matched in clearance, under the impact of lightning current, be easy to occur becoming flexible, after long-term the use, can lose lightning-arrest effect.
Summary of the invention
For above-mentioned technical problem, this practical purpose provides a kind of low pressure valve type arrester, and by the reinforcing to spark gap sheet and mica washer, even under the impact of large electric current, spark gap sheet and mica washer can not become flexible or come off yet.
The low pressure valve type arrester, one end of earthenware is provided with terminals, the other end is provided with lower terminals, be provided with spring, power current blocking-up structure and valve block in the earthenware, described power current blocking-up structure bracing frame, a plurality of spark gap sheet and mica washer form, separate by mica washer between the adjacent spark gap sheet, spark gap sheet and mica washer are assemblied in the bracing frame, the upper end of bracing frame is connected with upper terminals by spring, the lower end of bracing frame contacts with valve block, and valve block is connected with lower terminals.
Adopted such scheme, the effect by bracing frame is anchored in the bracing frame spark gap sheet and mica washer, can not cause loosening under the impact of large electric current or comes off, and makes it play firm lightning protection function in lightning arrester.During normal voltage, valve block resistance is very large, and during overvoltage, valve block resistance becomes very little, so lightning arrester is when lightning overvoltage occurring on line, and its spark gap sheet is breakdown, and valve block can make lightning current release to the earth swimmingly.When the lightning overvoltage disappearance, when recovering power-frequency voltage on the circuit, valve block presents very large resistance, makes the insulation of spark gap sheet recover rapidly normally operation.
Description of drawings
Fig. 1 is this utility structure schematic diagram;
1 is earthenware, and 1a is gamp, and 1b is umbellule, and 2 is upper terminals, and 3 is lower terminals, and 4 is spring, and 5 is valve block, and 6a is upper electric conductor, and 6b is upper electric conductor, and 6c is insulating case, and 7 is the spark gap sheet, and 8 is mica washer.
Embodiment
With reference to Fig. 1, the low pressure valve type arrester that this is practical, the excircle of earthenware 1 are provided with gamp 1a and umbellule 1b, and the external diameter of gamp is 300mm, and the external diameter of gamp is 260mm.One end of earthenware 1 is provided with terminals 2, and the other end is provided with lower terminals 3, and upper terminals 2 are used for being connected with power output end, and lower terminals 3 are used for ground connection.Be provided with spring 4, power current blocking-up structure and valve block 5 in the earthenware 1.The power current blocking-up structure is comprised of bracing frame, a plurality of spark gap sheet 7 and mica washer 8.Spark gap sheet 7 adopts the copper sheet punching out to form, and spark gap sheet 7 passes through for cloudy disconnected power current in the normal power-up situation, and under the lightning overvoltage effect, the breakdown discharge of spark gap sheet is passed through lightning current.Separate by mica washer 8 between the adjacent spark gap sheet 7, spark gap sheet 7 is assemblied in the bracing frame 6 with mica washer 8, support frame as described above is comprised of upper electric conductor 6a, upper electric conductor 6b and insulating case 6c, and upper electric conductor 6a and upper electric conductor 6b are installed in respectively the upper and lower of insulating case 6c.The insulating case of bracing frame and earthenware 1 interference fit, the effect by bracing frame are anchored in the bracing frame spark gap sheet 7 and mica washer 8, can not cause loosening under the impact of large electric current or come off, and make it play firm lightning protection function in lightning arrester.The upper end of bracing frame is connected with upper terminals 2 by spring 4, and the lower end of bracing frame contacts with valve block 5, and valve block is connected with lower terminals.The valve block that valve block 5 is made for carborundum.This valve block has nonlinear characteristic, and during normal voltage, valve block resistance is very large, and during overvoltage, valve block resistance becomes very little, so lightning arrester is when lightning overvoltage occurring on line, and its spark gap sheet is breakdown, and valve block can make lightning current release to the earth swimmingly.When the lightning overvoltage disappearance, when recovering power-frequency voltage on the circuit, valve block presents very large resistance, makes the insulation of spark gap sheet recover rapidly normally operation.
Claims (4)
1. low pressure valve type arrester, one end of earthenware is provided with terminals, the other end is provided with lower terminals, be provided with spring, power current blocking-up structure and valve block in the earthenware, it is characterized in that: described power current blocking-up structure bracing frame, a plurality of spark gap sheet and mica washer form, separate by mica washer between the adjacent spark gap sheet, spark gap sheet and mica washer are assemblied in the bracing frame, the upper end of bracing frame is connected with upper terminals by spring, the lower end of bracing frame contacts with valve block, and valve block is connected with lower terminals.
2. low pressure valve type arrester according to claim 1 is characterized in that, support frame as described above is comprised of upper electric conductor, upper electric conductor and insulating case, and upper electric conductor and upper electric conductor are installed in respectively the upper and lower of insulating case.
3. low pressure valve type arrester according to claim 1 is characterized in that, described valve block is the valve block that carborundum is made.
4. low pressure valve type arrester according to claim 1 is characterized in that, the excircle of earthenware is provided with gamp and umbellule, and the external diameter of gamp is 300mm, and the external diameter of gamp is 260mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220316355 CN202712686U (en) | 2012-06-30 | 2012-06-30 | Low voltage valve type lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220316355 CN202712686U (en) | 2012-06-30 | 2012-06-30 | Low voltage valve type lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202712686U true CN202712686U (en) | 2013-01-30 |
Family
ID=47592951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220316355 Expired - Fee Related CN202712686U (en) | 2012-06-30 | 2012-06-30 | Low voltage valve type lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202712686U (en) |
-
2012
- 2012-06-30 CN CN 201220316355 patent/CN202712686U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20130630 |