CN1024233C - Heat treating method for zinc oxide resistance sheet - Google Patents
Heat treating method for zinc oxide resistance sheet Download PDFInfo
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- CN1024233C CN1024233C CN 92109950 CN92109950A CN1024233C CN 1024233 C CN1024233 C CN 1024233C CN 92109950 CN92109950 CN 92109950 CN 92109950 A CN92109950 A CN 92109950A CN 1024233 C CN1024233 C CN 1024233C
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- zinc oxide
- resistance sheet
- oxide resistance
- temperature
- per hour
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Abstract
The present invention relates to a method for the heat treatment of a zinc oxide resistor sheet, which is characterized in that a kiln is heated from room temperature in the speed of 50 to 100 DEG C per hour, and heat is preserved for 1 to 4 hours when the temperature achieves 490 to 550 DEG C; then, the temperature drops in the speed of 10 to 17 DEG C per hour until the room temperature is achieved. The method of the present invention has reasonable technique and high yield; the treated zinc oxide resistor sheet has good quality, good thermal stability and aging resistance.
Description
The present invention relates to the heat treatment method of lightning arrester with zinc oxide resistance sheet, is the improvement to the Technology for Heating Processing of existing zinc oxide resistance sheet.
Zinc oxide resistance sheet is the critical component of lightning arrester, its resistance is with the applied voltage size nonlinear change to take place, when running into the thunder and lightning attack that exceeds the normal voltage manyfold, the resistance of zinc oxide resistance sheet can instantaneously reduce many, make powerful transient current under the zinc oxide resistance sheet inflow place, avoid big electric current flow through electrical appliance and burning apparatus, but what influence the ZnO resistors tablet quality is Technology for Heating Processing, many manufacturer production zinc oxide resistance sheets are arranged at present both at home and abroad, the producer that has does not heat-treat zinc oxide resistance sheet, the Technology for Heating Processing of the production man that abroad has is also undesirable, because they fix on 475 ℃ to the maximum temperature of tunnel kiln, cooling rate per hour is 17-20 ℃, utilize this process to handle the zinc oxide resistance sheet of producing with domestic raw material, aging poor performance, after being contained on the lightning arrester operation a period of time, leakage current increases gradually, power loss increases gradually, the useful life of zinc oxide resistance sheet is short, just cause the damage of power equipment in case break down, also influence is produced.
The objective of the invention is to study a kind of heat treatment method of zinc oxide resistance sheet, to improve the thermal stability and the durability of zinc oxide resistance sheet.
The heat treatment of zinc oxide resistance sheet of the present invention is to carry out in the electric heating tunnel cave, the characteristics of this heat treatment method are that kiln begins with per hour 50-100 ℃ speed rising from room temperature, when temperature reaches 490-550 ℃, kept temperature 1-4 hour, then with per hour 10-17 ℃ speed decline, till room temperature.
The temperature-controlled process of zinc oxide resistance sheet heat treatment kiln is by thermocouple temperature measurement, controls the angle of flow of controllable silicon adjuster then, with the quantity and the position of control resistive heater, reaches the purpose of temperature control.
The heat treatment method of zinc oxide resistance sheet of the present invention and existing heat treatment method compare: the inventive method technology is reasonable, its rate of finished products height, the quality of zinc oxide resistance sheet is good, Heat stability is good, with the zinc oxide resistance sheet after the processing of this process, in ageing test, the leakage current of zinc oxide resistance sheet increases in time and descends, it also is the decline superpotential power consumption, stops power consumption (W
2) and initial power consumption (W
1) ratio less than 1, improved the useful life of zinc oxide arrester.
Accompanying drawing is the heat treatment temperature curve chart of zinc oxide resistance sheet.
Among the figure, t is the time, and T is a temperature, and h is hour.
Below by above-mentioned process for an embodiment:
Zinc oxide resistance sheet is placed in the kiln, with per hour 70 ℃ speed intensification, in the time of 505 ℃, be incubated 3 hours, again with per hour 15 ℃ speed cooling, the according to said method zinc oxide resistance sheet of Chu Liing, through the good thermal stability of this resistor disc of evidence, long service life.
Claims (1)
- A kind of heat treatment method of zinc oxide resistance sheet, be in electrically heated tunnel cave, to carry out, the feature of this processing method is that kiln begins with per hour 50-100 ℃ speed rising from room temperature, when temperature reaches 490-550 ℃, kept temperature 1--4 hour, then with per hour 10--17 ℃ speed decline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92109950 CN1024233C (en) | 1992-09-29 | 1992-09-29 | Heat treating method for zinc oxide resistance sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92109950 CN1024233C (en) | 1992-09-29 | 1992-09-29 | Heat treating method for zinc oxide resistance sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1076052A CN1076052A (en) | 1993-09-08 |
| CN1024233C true CN1024233C (en) | 1994-04-13 |
Family
ID=4944500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92109950 Expired - Fee Related CN1024233C (en) | 1992-09-29 | 1992-09-29 | Heat treating method for zinc oxide resistance sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1024233C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014661B (en) * | 2020-07-17 | 2023-06-23 | 中国电力科学研究院有限公司 | Method and system for determining aging characteristic of direct current arrester resistor disc |
-
1992
- 1992-09-29 CN CN 92109950 patent/CN1024233C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1076052A (en) | 1993-09-08 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |