CN2197730Y - ZnO pressure sensative resistor - Google Patents
ZnO pressure sensative resistor Download PDFInfo
- Publication number
- CN2197730Y CN2197730Y CN 94221641 CN94221641U CN2197730Y CN 2197730 Y CN2197730 Y CN 2197730Y CN 94221641 CN94221641 CN 94221641 CN 94221641 U CN94221641 U CN 94221641U CN 2197730 Y CN2197730 Y CN 2197730Y
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- CN
- China
- Prior art keywords
- string
- arc extinguishing
- sealing
- cover
- sealing arc
- Prior art date
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Abstract
The utility model provides an improved zinc oxide pressure-sensitive resistor, comprising a zinc oxide resistor string (5) which is held between a conductive strip (7) and an insulating pressing plate (1) and is lapped in string way in sequence, a wire connecting terminal (9), and an elastic rubber sheet (8). The utility model is characterized in that the utility model also comprises a sealing arc extinguishing sleeve; the sealing arc extinguishing sleeve is formed by string lapping of a ceramic sleeve (3) and a high-temperature-resistant rubber sealing ring (6) at both ends of the sealing arc extinguishing sleeve; the sealing arc extinguishing sleeve can make the zinc oxide resistor string (5), the inner extending end of the wire connecting terminal (9), and the elastic rubber sheet (8) be sealed between the conductive strip (7) and the insulating pressing plate (1), which not only can prevent the moisture eroding for zinc oxide resistor string (5), but also can prevent electric arc bolting out.
Description
The utility model relates to a kind of overvoltage protection semiconductor device, a kind of varistor, and more particularly a kind of high energy ZnO varistor mainly is applicable to the quick de-excitation of synchronous generator rotor and the switching overvoltage protection of electric equipment.
The common high energy ZnO varistor that is used for synchronous generator rotor quick de-excitation mainly is that clamping is gone here and there folded zinc oxide valve plate (resistance) string, binding post and elastic pressuring plate (silicon rubber compressing tablet) and the bakelite protective sleeve that is sleeved on outside described zinc oxide valve plate string, binding post and the elastic pressuring plate constitutes successively between busbar and insulating press boards.Owing to for rigidity contacts,, so can't avoid the erosion of humid air and other corrosive gas between two of the bakelite protective sleeve that this common high energy ZnO resistors device is used and busbar and the insulation board again without any seal approach.After wherein high energy ZnO valve block is subjected to the erosion of above-mentioned pernicious gas, the leakage current of its cut-off region will constantly increase, aging aggravation, and the demagnetization capacity that can bear decreases, and finally causes puncturing and burns.Burnt in case be located at the outer bakelite protective sleeve of high energy gasification zinc valve block string, electric arc is just scurried out and is burnt out its contiguous high energy ZnO varistor and other electric equipment.
In view of there is above-mentioned deficiency in prior art, the purpose of this utility model provides a kind of erosion that can prevent pernicious gas, the modified model high energy ZnO varistor that can stop electric arc to be scurried out again.
The utility model realizes that the above-mentioned purpose technical solution comprises folded ZnO resistors string, binding post, the elastic sheet rubber of string successively that is clamped between busbar and the insulating press boards, it is characterized in that also comprising sealing arc extinguishing cover, sealing arc extinguishing cover is made of the folded institute of ceramic jacket and the high-temperature resistant rubber sealing ring string that is located at its two; The insulating press boards at two and busbar are common up and down constitutes an annular seal space with it for described sealing arc extinguishing cover, and inner extending end, the elastic sheet rubber of described ZnO resistors string, binding post sealed within it.
Because the main body of sealing arc extinguishing cover described in the utility model adopts ceramic jacket, the sealing of high-temperature resistant rubber sealing ring has been used at two again, so when normal operation, can prevent the erosion of moisture and other pernicious gas effectively to the ZnO resistors string, and when the energy breakdown accident takes place, can stop scurrying out of strong electric arc, avoid burning contiguous high energy ZnO varistor and other electric equipment, prevent stretching of accident.This shows that it is long that the utility model has a life-span than prior art, outstanding advantage and remarkable result safe in utilization.
Below in conjunction with drawings and Examples the utility model is explained in further detail.
Fig. 1 and Fig. 2 are for showing the structural representation of a specific embodiments of the present utility model; Wherein, Fig. 1 is front view (full section), and Fig. 2 is a vertical view.
Referring to Fig. 1 and Fig. 2, described ZnO resistors string 5 is made of four discoid zinc oxide resistance sheet series connection; ZnO resistors string 5, binding post 9, elastic sheet rubber 8 are gone here and there successively from bottom to up and are stacked by four screw rod 10 fastening clamps between busbar 7 and insulating press boards 1; Sealing arc extinguishing cover described in the utility model is by a ceramic jacket 3 cylindraceous and folded the forming of high-temperature resistant rubber sealing ring 6 strings that is located at this ceramic jacket two about in the of 3; Described sealing arc extinguishing cover and its higher authorities' insulating press boards 1 and following busbar 7 be common to constitute an annular seal space with the inner extending end of ZnO resistors string 5, binding post 9, elastic sheet rubber 8 sealings within it.
Referring to Fig. 1 and Fig. 2, another ancillary technique of the present utility model is characterised in that the outer seal protection cover that also is provided with of described sealing arc extinguishing cover, and the sealing protective sleeve is made of with the folded institute of sealing ring 2 strings that is located at bakelite cover two about in the of 4 bakelite cover 4; Described seal protection cover and its higher authorities' insulating press boards 1 and the another annular seal space of following busbar 7 common formations, with the sealing of described sealing arc extinguishing cover within it, to reach the purpose that ceramic jacket 3 is within it established in further raising sealing effectiveness and protection.
Implementation method beyond the utility model is above-mentioned is utilized known technology and is seen figures.1.and.2 and carries out.
Claims (2)
1, a kind of high energy ZnO varistor, comprise folded ZnO resistors string (5), binding post (9), the elastic sheet rubber (8) of string successively that is clamped between busbar (7) and the insulating press boards (1), it is characterized in that also comprising sealing arc extinguishing cover, sealing arc extinguishing cover by ceramic jacket (3) and high-temperature resistant rubber sealing ring (6) string that is located at its two fold constitute; Described sealing arc extinguishing cover with its up and down the insulating press boards (1) and the busbar (7) at two constitute an annular seal space jointly, inner extending end, the elastic sheet rubber (8) of described ZnO resistors string (5), binding post (9) sealed within it.
2, a kind of high energy ZnO varistor according to claim 1 is characterized in that the outer seal protection cover that also is provided with of described sealing arc extinguishing cover, the sealing protective sleeve by bakelite cover (4) and sealing ring (2) string that is located at its two fold constitute; Described seal protection cover and its insulating press boards (1) and the busbar (7) at two up and down constitute another annular seal space jointly, with the sealing of described sealing arc extinguishing cover within it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94221641 CN2197730Y (en) | 1994-09-15 | 1994-09-15 | ZnO pressure sensative resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94221641 CN2197730Y (en) | 1994-09-15 | 1994-09-15 | ZnO pressure sensative resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2197730Y true CN2197730Y (en) | 1995-05-17 |
Family
ID=33835888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94221641 Expired - Fee Related CN2197730Y (en) | 1994-09-15 | 1994-09-15 | ZnO pressure sensative resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2197730Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464378C (en) * | 2004-04-27 | 2009-02-25 | 李炬 | A piezoresistor having arc-extinguishing and flame-proofing function |
| WO2016173250A1 (en) * | 2015-04-29 | 2016-11-03 | 陈斌 | Surge protection device |
-
1994
- 1994-09-15 CN CN 94221641 patent/CN2197730Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464378C (en) * | 2004-04-27 | 2009-02-25 | 李炬 | A piezoresistor having arc-extinguishing and flame-proofing function |
| WO2016173250A1 (en) * | 2015-04-29 | 2016-11-03 | 陈斌 | Surge protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |