CN87215730U - High-voltage zno pressure-sensitive resistor - Google Patents
High-voltage zno pressure-sensitive resistor Download PDFInfo
- Publication number
- CN87215730U CN87215730U CN 87215730 CN87215730U CN87215730U CN 87215730 U CN87215730 U CN 87215730U CN 87215730 CN87215730 CN 87215730 CN 87215730 U CN87215730 U CN 87215730U CN 87215730 U CN87215730 U CN 87215730U
- Authority
- CN
- China
- Prior art keywords
- compression moulding
- voltage
- zinc oxide
- moulding tube
- valve plate
- Prior art date
- 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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- Thermistors And Varistors (AREA)
Abstract
The utility model discloses a high-voltage zinc white pressure-sensitive resistor belonging to an electronic electrician product. The high-voltage zinc white pressure-sensitive resistor is mainly used for absorbing the over voltage of the high voltage power rectifier, and protecting the insulation of electrical equipment, such as transformers, from the harm of over voltage. The utility model is provided aiming to solve the problem that a zinc white arrester is easily exploded during the line operation and the sealability is bad. Thermosetting compression molding material of glass fibre is pressed to form a compression molding cylinder and a traditional porcelain sleeve is replaced. Simultaneously the volume of a zinc white valve sheet is small. The residual pressure is low. The discharge capacity is big. The whole structure and the manufacturing technology are simple. The problems of arc and explosion protection and the sealability are effectively solved.
Description
The utility model belongs to the electron and electrician product, is mainly used in the high-voltage rectifier power source overvoltage and absorbs, the overvoltage that produces when absorbing vacuum switch and low-oil-content circuit-breaker operation inductive load, and superpotential harm is avoided in the insulation of electric equipments such as protection transformer.
There are two big technical problems in the zinc oxide arrester of each manufacturer production of China always for a long time.One, how lightning arrester solves explosion-proof problem, and two, because that sealing problem solves is bad, and cause lightning arrester to withdraw from the circuit operation.(add up according to research institute of Ministry of Water Resources and Power Industry, it all is because sealing problem causes that the zinc oxide arrester that China produces withdraws from 90% of circuit operation) therefore above two problems concerning the manufacturer and user of zinc oxide arrester, be a more scabrous difficult problem always.
The purpose of this utility model is fully aware of, is primarily aimed at above technical problem, develops a kind of new high pressure oxidation zinc varistor, to solve the problem of and sealing explosion-proof at circuit preventing arc in service.
Realize that main task of the present utility model is to seek a kind of shell of new preventing arc explosion-proof lamp, to replace insulator, make the zinc oxide valve plate residual voltage low simultaneously, discharge capacity is big.Concrete structure of the present utility model is that this high pressure oxidation zinc varistor comprises zinc oxide valve plate, compression moulding tube, spring assembly, end-cap assembly and sealing ring etc.Zinc oxide valve plate is mainly by zinc oxide, bismuth oxide, cobalt oxide, antimony oxide, materials such as chromium oxide are through overmolding, and high temperature sintering becomes the non-linear substrate of poly semiconductor pottery, and enclose electrode in the substrate both ends of the surface, the compression moulding tube adopts the compacting of glass fibre thermosetting compression molding material to form.Be provided with end cap and bolt at compression moulding tube two ends, the end cap roll extrusion is on the compression moulding tube, and zinc oxide valve plate places in the compression moulding tube, and zinc oxide valve plate one end contacts with end cap, is equipped with sealing ring on the other end and by spring base, conductive strips, the spring assembly that spring is formed.
The utility model is under normal voltage, and the boundary layer is high impedance status, has only very little leakage current (the μ A order of magnitude) to flow through varistor (seeing accompanying drawing two).And when overvoltage occurring in the circuit, the boundary layer becomes Low ESR (reaction time is the nanosecond order of magnitude) overvoltage rapidly and is sponged by piezo-resistance with the form of discharging current, and overvoltage just is suppressed.(seeing accompanying drawing three) overvoltage is with e
SOxidized zinc piezo-resistance is suppressed to V
Z, the proof voltage of equipment is higher than V
S, equipment just obtains protection, and after the surge voltage, for the normal voltage of circuit, the boundary layer recovers high impedance status again, does not take place so the utility model does not have the power frequency continued flow of general valve type arrester.For example making overvoltage protection, the protection high pressure vacuum exchanges and connects the energy device, uses on the 380kW ball mill, puts 6750 times for every, and evidence the utility model has reached Expected Results fully.
Below in conjunction with the utility model accompanying drawing, further describe its structure member.
Accompanying drawing one is the utility model structural representation, (1) zinc oxide valve plate among the figure, (2) end cap, (3) sealing ring, (4) compression moulding tube, (5) spring assembly, (6) bolt, (7) spring washer, (8) plain washer, (9) nut.During assembling, on the compression moulding tube, more successively with zinc oxide valve plate, sealing ring, spring assembly are loaded in the compression moulding tube, another end cap roll extrusion are formed again with an end end cap roll extrusion in elder generation.
Accompanying drawing two is the utility model Z
nThe current-voltage diagram of O valve block.
Accompanying drawing three is the utility model Z
nO resistance suppresses the overvoltage schematic diagram.
The utility model structure and manufacture craft are simple, are used for the high-voltage rectifier power source overvoltage and absorb, and overvoltage injury is avoided in the insulation of the electric equipments such as protection transformer, and is significant.
Claims (2)
1, a kind of high pressure oxidation zinc varistor that is used for the absorption of high-voltage rectifier power source overvoltage, comprise zinc oxide valve plate, the compression moulding tube, spring assembly, end-cap assembly and seals and other component is characterized in that zinc oxide valve plate is by zinc oxide, bismuth oxide, cobalt oxide, antimony oxide, materials such as chromium oxide are through overmolding, and high temperature sintering becomes the non-linear substrate of poly semiconductor pottery, and enclose electrode in basic both ends of the surface, the compression moulding tube adopts the compacting of glass fibre thermosetting plastics to form, and is provided with end cap and bolt at compression moulding tube two ends, and the end cap roll extrusion is on the compression moulding tube, be built-in with zinc oxide valve plate at the compression moulding tube, spring assembly and sealing ring.
2, high pressure oxidation zinc varistor according to claim 1 is characterized in that zinc oxide valve plate end in the compression moulding tube contacts with end cap, is equipped with sealing ring on the other end and by spring base, conductive strips, the spring assembly that spring is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87215730 CN87215730U (en) | 1987-12-28 | 1987-12-28 | High-voltage zno pressure-sensitive resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87215730 CN87215730U (en) | 1987-12-28 | 1987-12-28 | High-voltage zno pressure-sensitive resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87215730U true CN87215730U (en) | 1988-08-17 |
Family
ID=4829801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87215730 Expired - Lifetime CN87215730U (en) | 1987-12-28 | 1987-12-28 | High-voltage zno pressure-sensitive resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87215730U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101436456B (en) * | 2008-12-11 | 2011-03-23 | 中国西电电气股份有限公司 | Method for preparing zinc oxide resistance card |
| CN101325106B (en) * | 2008-04-08 | 2011-06-15 | 合肥南南电力保护设备有限公司 | Constant voltage overvoltage protector |
| CN110156454A (en) * | 2019-05-27 | 2019-08-23 | 国网湖南省电力有限公司 | The preparation method of zinc oxide varistor |
-
1987
- 1987-12-28 CN CN 87215730 patent/CN87215730U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101325106B (en) * | 2008-04-08 | 2011-06-15 | 合肥南南电力保护设备有限公司 | Constant voltage overvoltage protector |
| CN101436456B (en) * | 2008-12-11 | 2011-03-23 | 中国西电电气股份有限公司 | Method for preparing zinc oxide resistance card |
| CN110156454A (en) * | 2019-05-27 | 2019-08-23 | 国网湖南省电力有限公司 | The preparation method of zinc oxide varistor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |