CN114242359B - Lightning arrester with pressure relief device - Google Patents
Lightning arrester with pressure relief device Download PDFInfo
- Publication number
- CN114242359B CN114242359B CN202111549961.4A CN202111549961A CN114242359B CN 114242359 B CN114242359 B CN 114242359B CN 202111549961 A CN202111549961 A CN 202111549961A CN 114242359 B CN114242359 B CN 114242359B
- Authority
- CN
- China
- Prior art keywords
- lock tongue
- pressure relief
- insulating jacket
- spring
- arrester
- 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.)
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Links
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000011787 zinc oxide Substances 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 238000007142 ring opening reaction Methods 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention discloses a lightning arrester with a pressure relief device, which comprises an insulating jacket, a zinc oxide resistor disc, an upper terminal electrode and a lower terminal electrode, wherein the insulating jacket is provided with a plurality of metal electrodes; a power storage spring is arranged outside the zinc oxide resistor disc at the inner upper part of the insulating jacket; the power accumulating spring is compressed in the insulating jacket; a lock tongue hole is formed in the middle of the inner wall of the insulating jacket; a telescopic spring is arranged in the lock tongue hole; the lock tongue is arranged in the lock tongue hole through a telescopic spring; under the normal state, the lock tongue stretches out of the lock tongue hole under the action of the telescopic spring; the power accumulating spring presses the impact block on the upper side surface of the lock tongue; the inner side surface of the lower end cover of the insulating jacket is provided with a concentric double-groove ring with a V-shaped cross section.
Description
Technical Field
The invention relates to a lightning arrester, in particular to a lightning arrester with a pressure relief device.
Background
The arrester is also called overvoltage protector or overvoltage limiter. The lightning arresters are typically connected between the grid cable and earth, typically in parallel with the protected equipment. The lightning arrester can effectively protect equipment, and once abnormal voltage appears, the lightning arrester acts to play a role in protection. When the device is operated at normal operating voltage, the lightning arrester will not function and is considered to be open circuit to the ground. Once a high voltage occurs and the insulation of the protected equipment is compromised, the lightning arrester acts immediately, directing the surge current to ground, limiting the overvoltage amplitude and protecting the equipment. After the overvoltage disappears, the lightning arrester quickly returns to the original state, so that the equipment and the circuit work normally.
The zinc oxide resistor disc in the zinc oxide lightning arrester commonly used at present has good nonlinear volt-ampere characteristic. When normal operating voltage is applied to the arrester, only a small leakage current in the resistor disc passes, which is equal to an open circuit. When overvoltage occurs, a large current passes through the lightning arrester, but the voltage is limited to a certain range and is close to a short circuit.
The zinc oxide lightning arrester is formed by stacking a plurality of zinc oxide resistor sheets, and an insulating jacket is arranged outside the zinc oxide lightning arrester. Terminal electrodes are respectively connected to two ends of the zinc oxide resistor disc, the upper terminal electrode is connected to a power grid wire, and the lower terminal electrode is connected to a ground wire.
When the voltage is too high, and the zinc oxide resistor is damaged, high-temperature and high-pressure arc gas can be generated inside the lightning arrester. In the prior art, in order to release pressure for the lightning arrester, a thin wall part is arranged on an insulating jacket of the lightning arrester, so that high-pressure gas breaks through the thin wall part to release pressure.
However, the thin wall portion also reduces the strength of the insulating cover of the arrester at that portion, resulting in accidental damage. In addition, the thin wall portion is generally disposed on a circumferential side wall of the arrester, and after the arc gas of high pressure and high temperature leaks out from the side surface of the arrester, personnel and equipment near the arrester may be injured.
Accordingly, those skilled in the art have been directed to developing an improved arrester with a pressure relief device.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention is to provide an improved lightning arrester with a pressure relief device.
In order to achieve the aim, the invention provides a lightning arrester with a pressure relief device, which comprises an insulating jacket, a zinc oxide resistor disc, an upper terminal electrode and a lower terminal electrode; a power storage spring is arranged outside the zinc oxide resistor disc at the inner upper part of the insulating jacket; the power accumulating spring is compressed in the insulating jacket; a lock tongue hole is formed in the middle of the inner wall of the insulating jacket; a telescopic spring is arranged in the lock tongue hole; the lock tongue is arranged in the lock tongue hole through a telescopic spring; under the normal state, the lock tongue stretches out of the lock tongue hole under the action of the telescopic spring; the power accumulating spring presses the impact block on the upper side surface of the lock tongue; the inner side surface of the insulating jacket is provided with a concentric double-groove ring with a V-shaped cross section.
Further, the upper side surface of the lock tongue is set to be a plane, and the lower side surface is set to be an inclined plane.
Further, an insulating material is provided outside the zinc oxide resistor sheet to insulate it from the power spring and the impact block.
Further, the insulating material is an insulating film or a coating.
Further, the impact block is made of metal, and the impact part thereof is in an inverted trapezoid shape.
Further, the impact block is made of stainless steel.
Further, the impact blocks are symmetrically arranged in the circumferential direction of the zinc oxide resistor disc.
Further, the number of impact blocks is 4.
According to the lightning arrester disclosed by the invention, the pressure relief part is arranged at the lower end cover of the lightning arrester, so that the damage of high-pressure high-temperature arc gas caused by leakage can be minimized. Meanwhile, a thin wall part is not specially arranged on the lower end cover, the pressure release ring is broken through by triggering the built-in energy storage spring and the impact block through high-pressure gas, and an open slot can be arranged on the inner wall surface of the lower end cover, so that the external strength of the insulating jacket is not influenced.
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
Drawings
FIG. 1 is a schematic view of a surge arrester with a pressure relief device in a preferred embodiment of the present invention;
fig. 2 is a partial enlarged view at a in fig. 1;
fig. 3 is a schematic view of the arrester in a preferred embodiment of the present invention after decompression.
Detailed Description
The following description of the preferred embodiments of the present invention refers to the accompanying drawings, which make the technical contents thereof more clear and easy to understand. The present invention may be embodied in many different forms of embodiments and the scope of the present invention is not limited to only the embodiments described herein.
A lightning arrester with pressure relief device according to the present invention, as shown in fig. 1 and 2, comprises an insulating jacket 1, a zinc oxide resistive film 2, and upper and lower terminal electrodes 3, 4. Wherein the upper terminal electrode 3 is connected to the grid cable, and the lower terminal electrode 4 is connected to the ground line. A power spring 8 is arranged at the upper part of the inside of the insulating jacket 1 and at the periphery of the zinc oxide resistor disc 2. The power spring 8 is compressed within the insulating jacket 1. A bolt hole 14 is arranged in the middle of the inner wall of the insulating jacket 1. A telescopic spring 10 is arranged in the bolt hole 14. The bolt 11 is mounted in the bolt hole 14 by a telescopic spring 10. Under normal conditions, the bolt 11 extends out of the bolt hole 14 under the action of the telescopic spring 10. The power spring 8 presses the impact block 9 against the upper side 15 of the tongue 11. The inner side surface 6 of the lower end cover 7 of the insulating jacket 1 is provided with a concentric double-groove ring 5 with a V-shaped cross section.
As shown in fig. 2, when high-temperature and high-pressure arc gas is generated inside the arrester, the high-pressure gas presses the tongue 11 into the tongue hole 14, thereby triggering the power storage spring 8. The impact block 9 is ejected out at a high speed by the power accumulating spring 8 and impacted on the inner side surface 6 of the lower end cover 7 of the insulating jacket 1, so that the lower end cover 7 breaks and falls off along the concentric double-groove ring 5 on the inner side surface 6 to form a pressure relief ring opening 13, and meanwhile, internal high-pressure gas is discharged from the pressure relief ring opening 13.
The upper side 15 of the bolt 9 is provided as a flat surface and the lower side 16 as a bevel surface to facilitate the initial assembly of the compression power spring 8 and the impact block 9.
An insulating film or insulating coating is provided on the outside of the zinc oxide resistor sheet 2 to insulate it from the power spring 8 and the impact block 9.
The impact block 9 is made of metal, and the impact portion 17 thereof has an inverted trapezoidal shape.
The impact blocks 9 and the bolts 11 are symmetrically arranged in the circumferential direction of the zinc oxide resistor disc 2, such as 2, 4, 6, etc.
According to the lightning arrester disclosed by the invention, the pressure relief part is arranged at the lower end cover of the lightning arrester, so that the damage of high-pressure high-temperature arc gas caused by leakage can be minimized. Meanwhile, a thin wall part is not specially arranged on the lower end cover, but the pressure relief ring opening is broken through by triggering the built-in energy storage spring and the impact block through high-pressure gas, and an open slot can be arranged on the inner wall surface of the lower end cover, so that the external strength of the insulating jacket is not influenced.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention without requiring creative effort by one of ordinary skill in the art. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (7)
1. The lightning arrester with the pressure relief device is characterized by comprising an insulating jacket, a zinc oxide resistor disc, an upper terminal electrode and a lower terminal electrode; a power storage spring is arranged outside the zinc oxide resistor disc at the inner upper part of the insulating jacket; the power accumulating springs are symmetrically arranged in the circumferential direction of the zinc oxide resistor disc, the axes of the power accumulating springs are parallel to the axes of the zinc oxide resistor disc and are longitudinally compressed in the insulating jacket, and the power accumulating springs have a downward relaxation tendency; a lock tongue hole is formed in the middle of the inner wall of the insulating jacket; a telescopic spring is arranged in the lock tongue hole; the lock tongue is arranged in the lock tongue hole through a telescopic spring; under the normal state, the lock tongue stretches out of the lock tongue hole under the action of the telescopic spring; the power accumulating spring presses the impact block on the upper side surface of the lock tongue; the inner side surface of the lower end cover of the insulating jacket is provided with a concentric double-groove ring, and the cross section of the ring groove is V-shaped;
when high-temperature and high-pressure arc gas is generated in the lightning arrester, the high-pressure gas presses the lock tongue into the lock tongue hole, so that the power storage spring is triggered; the impact block is ejected out at a high speed by the power accumulating spring and impacted on the inner side surface of the lower end cover of the insulating jacket, so that the lower end cover breaks and falls off along the concentric double-groove ring on the inner side surface of the lower end cover to form a pressure relief ring opening, and meanwhile, internal high-pressure gas is discharged from the pressure relief ring opening.
2. The arrester with pressure relief device according to claim 1, wherein the upper side of the tongue is provided as a flat surface and the lower side is provided as a beveled surface.
3. The arrester with pressure relief device according to claim 2, wherein an insulating material is provided outside the zinc oxide resistive sheet to insulate it from the power spring and the impact block.
4. A surge arrester with pressure relief device as claimed in claim 3 wherein the insulating material is an insulating film or coating.
5. The arrester with pressure relief device as claimed in claim 4, wherein the impact block is made of metal and the impact portion thereof is inverted trapezoidal.
6. The arrester with pressure relief device as in claim 5, wherein the impact block is made of stainless steel.
7. The arrester with pressure relief device as in claim 6, wherein the number of impact blocks is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111549961.4A CN114242359B (en) | 2021-12-17 | 2021-12-17 | Lightning arrester with pressure relief device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111549961.4A CN114242359B (en) | 2021-12-17 | 2021-12-17 | Lightning arrester with pressure relief device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114242359A CN114242359A (en) | 2022-03-25 |
| CN114242359B true CN114242359B (en) | 2023-11-17 |
Family
ID=80758057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111549961.4A Active CN114242359B (en) | 2021-12-17 | 2021-12-17 | Lightning arrester with pressure relief device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114242359B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08167505A (en) * | 1994-12-15 | 1996-06-25 | Otowa Denki Kogyo Kk | Layer of arrester device in lightning arrester |
| JPH1140311A (en) * | 1997-07-16 | 1999-02-12 | Meidensha Corp | Arrester |
| JP2000021609A (en) * | 1998-06-29 | 2000-01-21 | Toshiba Corp | Lightning arrester |
| JP2002175905A (en) * | 2000-12-07 | 2002-06-21 | Mitsubishi Electric Corp | Arrester |
| CN108053958A (en) * | 2017-12-20 | 2018-05-18 | 国网湖南省电力有限公司 | A kind of arrester |
| CN109887693A (en) * | 2019-04-02 | 2019-06-14 | 泰州学院 | A kind of variable in-line gap composite insulating metal oxide lightning arrester |
| CN110932096A (en) * | 2019-12-26 | 2020-03-27 | 辽宁华隆电力科技股份有限公司 | Self-power-off type gap lightning arrester for three-dimensional wound core transformer |
| CN111210957A (en) * | 2020-01-07 | 2020-05-29 | 宁波市镇海国创高压电器有限公司 | Lightning arrester capable of resisting high tensile load |
| CN113130158A (en) * | 2021-04-19 | 2021-07-16 | 马丹 | Explosion-proof lightning arrester |
| CN113130156A (en) * | 2021-03-01 | 2021-07-16 | 莫诚柱 | Zinc oxide lightning arrester in box-type substation and use method thereof |
| CN214476728U (en) * | 2020-12-21 | 2021-10-22 | 苏州海阔能源科技有限公司 | Novel lightning arrester device |
| CN214541765U (en) * | 2021-03-29 | 2021-10-29 | 扬州华铁铁路配件有限公司 | EMUs lightning arrester convenient to installation is maintained |
-
2021
- 2021-12-17 CN CN202111549961.4A patent/CN114242359B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08167505A (en) * | 1994-12-15 | 1996-06-25 | Otowa Denki Kogyo Kk | Layer of arrester device in lightning arrester |
| JPH1140311A (en) * | 1997-07-16 | 1999-02-12 | Meidensha Corp | Arrester |
| JP2000021609A (en) * | 1998-06-29 | 2000-01-21 | Toshiba Corp | Lightning arrester |
| JP2002175905A (en) * | 2000-12-07 | 2002-06-21 | Mitsubishi Electric Corp | Arrester |
| CN108053958A (en) * | 2017-12-20 | 2018-05-18 | 国网湖南省电力有限公司 | A kind of arrester |
| CN109887693A (en) * | 2019-04-02 | 2019-06-14 | 泰州学院 | A kind of variable in-line gap composite insulating metal oxide lightning arrester |
| CN110932096A (en) * | 2019-12-26 | 2020-03-27 | 辽宁华隆电力科技股份有限公司 | Self-power-off type gap lightning arrester for three-dimensional wound core transformer |
| CN111210957A (en) * | 2020-01-07 | 2020-05-29 | 宁波市镇海国创高压电器有限公司 | Lightning arrester capable of resisting high tensile load |
| CN214476728U (en) * | 2020-12-21 | 2021-10-22 | 苏州海阔能源科技有限公司 | Novel lightning arrester device |
| CN113130156A (en) * | 2021-03-01 | 2021-07-16 | 莫诚柱 | Zinc oxide lightning arrester in box-type substation and use method thereof |
| CN214541765U (en) * | 2021-03-29 | 2021-10-29 | 扬州华铁铁路配件有限公司 | EMUs lightning arrester convenient to installation is maintained |
| CN113130158A (en) * | 2021-04-19 | 2021-07-16 | 马丹 | Explosion-proof lightning arrester |
Non-Patent Citations (1)
| Title |
|---|
| 电力机车用25kV金属氧化物避雷器;沈建华;机车电传动(第02期);全文 * |
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| Publication number | Publication date |
|---|---|
| CN114242359A (en) | 2022-03-25 |
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