CN102738706A - Low-voltage valve type lightning arrester - Google Patents
Low-voltage valve type lightning arrester Download PDFInfo
- Publication number
- CN102738706A CN102738706A CN2012102252756A CN201210225275A CN102738706A CN 102738706 A CN102738706 A CN 102738706A CN 2012102252756 A CN2012102252756 A CN 2012102252756A CN 201210225275 A CN201210225275 A CN 201210225275A CN 102738706 A CN102738706 A CN 102738706A
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- spark gap
- valve block
- bracing frame
- terminals
- valve type
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Abstract
The invention discloses a low-voltage valve type lightning arrester. One end of a ceramic tube is provided with an upper terminal, the other end of the ceramic tube is provided with a lower terminal, a spring, a power frequency current blocking structure and a valve plate are arranged in the ceramic tube, the power frequency current blocking structure consists of a support frame, a plurality of spark gap plates and a plurality of mica washers, the adjacent spark gap plates are separated by the mica washers, the spark gap plates and the mica washers are arranged in the support frame, the upper end of the support frame is connected with the upper terminal through the spring, the lower end of the support frame is contacted with the valve plate, and the valve plate is connected with the lower terminal. After being reinforced, the spark gap plates and the mica washers cannot become loose or fall off even in case of impact of large current.
Description
Technical field
The present invention relates to the lightning arrester in the electric power system, be 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 was in normal operating condition in system, the gap that mica washer and spark gap sheet constitute isolated the valve and the charged high-voltage conducting wires of lightning arrester.When overvoltage occurring, and when reaching the one of which 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 the system restoration normal operating conditions.Avoid effect though this lightning arrester can play,, under the impact of lightning current, be easy to occur becoming flexible, after long-term the use, can lose lightning-arrest effect because its inner spark gap sheet and mica washer and porcelain tube are matched in clearance.
Summary of the invention
To above-mentioned technical problem, the purpose of this invention is to provide a kind of low pressure valve type arrester, through the reinforcing to spark gap sheet and mica washer, even under the impact of big 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, and the other end is provided with down terminals, is provided with spring, power current blocking-up structure and valve block in the earthenware; Said power current blocking-up structure bracing frame, a plurality of spark gap sheet and mica washer are formed; Separate through mica washer between the adjacent spark gap sheet, spark gap sheet and mica washer are assemblied in the bracing frame, and the upper end of bracing frame is connected with last terminals through spring; The lower end of bracing frame contacts with valve block, and valve block is connected with following terminals.
Adopted such scheme, the effect through bracing frame is anchored in the bracing frame spark gap sheet and mica washer, under the impact of big electric current, can not cause loosening or comes off, and makes it in lightning arrester, play firm lightning protection function.During normal voltage, valve block resistance is very big, 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 big resistance, makes the insulation of spark gap sheet recover normally operation rapidly.
Description of drawings
Fig. 1 is a structural representation of the present invention;
1 is earthenware, and 1a is a gamp, and 1b is a umbellule, and 2 is last terminals, and 3 are following terminals, and 4 is spring, and 5 is valve block, and 6a is last electric conductor, and 6b is last electric conductor, and 6c is an insulating case, and 7 is the spark gap sheet, and 8 is mica washer.
Embodiment
With reference to Fig. 1, low pressure valve type arrester of the present invention, 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 down terminals 3, and last terminals 2 are used for being connected with power output end, and following 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 made up 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 is used for that cloudy disconnected power current passes through under the normal power-up situation, and under the lightning overvoltage effect, the breakdown discharge of spark gap sheet is passed through lightning current.Separate through 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 made up of last electric conductor 6a, last electric conductor 6b and insulating case 6c, and last electric conductor 6a and last electric conductor 6b are installed in the upper and lower of insulating case 6c respectively.The insulating case of bracing frame and earthenware 1 interference fit, the effect through bracing frame are anchored in the bracing frame spark gap sheet 7 and mica washer 8, under the impact of big electric current, can not cause loosening or come off, and make it in lightning arrester, play firm lightning protection function.The upper end of bracing frame is connected with last terminals 2 through spring 4, and the lower end of bracing frame contacts with valve block 5, and valve block is connected with following terminals.The valve block that valve block 5 is processed for carborundum.This valve block has nonlinear characteristic, and during normal voltage, valve block resistance is very big, 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 big resistance, makes the insulation of spark gap sheet recover normally operation rapidly.
Claims (4)
1. low pressure valve type arrester; One end of earthenware is provided with terminals, and the other end is provided with down terminals, is provided with spring, power current blocking-up structure and valve block in the earthenware; It is characterized in that: said power current blocking-up structure bracing frame, a plurality of spark gap sheet and mica washer are formed; Separate through mica washer between the adjacent spark gap sheet, spark gap sheet and mica washer are assemblied in the bracing frame, and the upper end of bracing frame is connected with last terminals through spring; The lower end of bracing frame contacts with valve block, and valve block is connected with following terminals.
2. low pressure valve type arrester according to claim 1 is characterized in that, support frame as described above is made up of last electric conductor, last electric conductor and insulating case, and last electric conductor and last electric conductor are installed in the upper and lower of insulating case respectively.
3. low pressure valve type arrester according to claim 1 is characterized in that, said valve block is the valve block that carborundum is processed.
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 |
|---|---|---|---|
| CN2012102252756A CN102738706A (en) | 2012-06-30 | 2012-06-30 | Low-voltage valve type lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102252756A CN102738706A (en) | 2012-06-30 | 2012-06-30 | Low-voltage valve type lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102738706A true CN102738706A (en) | 2012-10-17 |
Family
ID=46993732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102252756A Pending CN102738706A (en) | 2012-06-30 | 2012-06-30 | Low-voltage valve type lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102738706A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1015398A (en) * | 1974-06-17 | 1977-08-09 | Eugene C. Sakshaug | Sparkover stabilizing means for an ungraded surge voltage arrester |
| CN2078936U (en) * | 1990-12-21 | 1991-06-12 | 刘化交 | Damaged self-falling out arrester |
| CN1247368A (en) * | 1999-09-08 | 2000-03-15 | 南京跃华电子电气公司 | Metal oxide arrester with non-linear internal gap |
-
2012
- 2012-06-30 CN CN2012102252756A patent/CN102738706A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1015398A (en) * | 1974-06-17 | 1977-08-09 | Eugene C. Sakshaug | Sparkover stabilizing means for an ungraded surge voltage arrester |
| CN2078936U (en) * | 1990-12-21 | 1991-06-12 | 刘化交 | Damaged self-falling out arrester |
| CN1247368A (en) * | 1999-09-08 | 2000-03-15 | 南京跃华电子电气公司 | Metal oxide arrester with non-linear internal gap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121017 |