CN113393988A - Arrester for inhibiting flashover of resistance card and assembling method thereof - Google Patents
Arrester for inhibiting flashover of resistance card and assembling method thereof Download PDFInfo
- Publication number
- CN113393988A CN113393988A CN202110616287.0A CN202110616287A CN113393988A CN 113393988 A CN113393988 A CN 113393988A CN 202110616287 A CN202110616287 A CN 202110616287A CN 113393988 A CN113393988 A CN 113393988A
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- lightning arrester
- core body
- arrester
- insulating layer
- flashover
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000002401 inhibitory effect Effects 0.000 title description 4
- 239000002184 metal Substances 0.000 claims abstract description 48
- 230000002950 deficient Effects 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 229920001971 elastomer Polymers 0.000 claims abstract description 4
- 229920002379 silicone rubber Polymers 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims 1
- 239000004945 silicone rubber Substances 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 6
- 230000001629 suppression Effects 0.000 abstract 2
- 239000004944 Liquid Silicone Rubber Substances 0.000 description 7
- 238000010891 electric arc Methods 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 239000004593 Epoxy Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Classifications
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- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
Abstract
The application provides an arrester and its assembly method of suppression resistance card flashover, the arrester of suppression resistance card flashover includes: the lightning arrester core body comprises a plurality of coaxially arranged resistance cards and metal cushion blocks arranged at two ends of each resistance card; the fixing device fixes the lightning arrester core body by clamping two ends of the lightning arrester core body; the insulating layer is coated on the outer sides of the lightning arrester core body and the fixing device, and a plurality of rubber rings distributed along the axial direction of the insulating layer are arranged on the outer peripheral wall of the insulating layer; the lightning arrester comprises metal end covers, wherein the two metal end covers are respectively arranged at two ends of a core body of the lightning arrester, at least one metal end cover is provided with a connecting part, and the connecting part is used for fixing the lightning arrester and connecting a plurality of lightning arresters in series. The metal cushion block can adjust the distance between two adjacent resistance cards and can adjust the height of the whole lightning arrester core body. The insulating layer can restrain flashover electric arcs of defective electric arcs, effectively isolates and protects adjacent normal resistance cards, and avoids faults of the whole lightning arrester caused by defects of a single resistance card.
Description
Technical Field
The invention belongs to the technical field of lightning arresters, and particularly relates to a lightning arrester for inhibiting flashover of a resistor disc and an assembling method thereof.
Background
The large-capacity multi-column parallel arrester is widely applied to the fields of direct current converter stations, alternating current series compensation devices and the like, and mainly used for absorbing system redundant energy and limiting overvoltage. Operation experience shows that the lightning arrester has high failure rate due to the fact that the number of the parallel columns is large. Research shows that the main reason that the high fault rate of the large-capacity multi-column parallel arrester is the existence of a defective resistor disc with low probability, and adjacent qualified resistor discs are easy to be ablated when the surface of the defective resistor disc is in flashover, so that the lightning arrester is developed into the whole-column flashover fault.
Disclosure of Invention
In view of the above, the present invention provides an arrester for suppressing flashover of a resistor disc and an assembling method thereof, so as to solve or overcome at least one technical problem in the prior art.
In a first aspect, there is provided an arrester for suppressing flashover of a resistive sheet, comprising:
the lightning arrester core body comprises a plurality of coaxially arranged resistance cards and metal cushion blocks arranged at two ends of each resistance card;
a fixing device that fixes the surge arrester core body by clamping both ends of the surge arrester core body;
the insulating layer is coated on the outer sides of the lightning arrester core body and the fixing device, and a plurality of rubber rings distributed along the axial direction of the insulating layer are arranged on the outer peripheral wall of the insulating layer;
the lightning arrester comprises a lightning arrester core body, metal end covers and at least one connecting part, wherein the metal end covers are arranged at two ends of the lightning arrester core body respectively, and the connecting part is arranged on at least one of the metal end covers and used for fixing the lightning arrester and connecting the lightning arrester in series.
Further, the outer diameter of the resistance sheet is equal to that of the metal cushion block.
Further, the insulating layer is silicon rubber.
Further, the insulating layer is arranged on the lightning arrester core body in a pouring mode.
Further, the fixing device includes:
a plurality of insulating rods arranged in parallel with the surge arrester core body, the plurality of insulating rods being arranged in a circumferential direction of the surge arrester core body;
the metal connecting blocks are arranged at two ends of the lightning arrester core body respectively and are connected with the insulating rods respectively.
Furthermore, a plurality of metal cushion blocks are arranged between every two adjacent resistance cards, and the thickness of each metal cushion block is more than or equal to 20 mm.
In a second aspect, there is provided a method of assembling a surge arrester that suppresses flashover of a resistor disc, comprising:
acquiring parts of a lightning arrester and liquid silicon rubber;
secondly, connecting the resistance cards and the metal cushion blocks in series at intervals in sequence;
thirdly, adjusting the height of the lightning arrester core body by adopting the metal cushion blocks, and adjusting and fixing devices to fix the resistance cards and the metal cushion blocks;
and fourthly, arranging an insulating layer on the lightning arrester core body.
Further, still include:
and fifthly, performing detection tests on the lightning arrester for at least 8 times to ensure that the normal resistance card does not have flashover.
Further, before the lightning arrester is subjected to a detection test, a defective resistor disc is arranged on the core body of the lightning arrester, and a preset energy is injected into the lightning arrester by using an impact current generator, so that the duration of the test current is at least 130ms, and the amplitude of the test current is 90-160A.
Further, the method for arranging the insulating layer on the lightning arrester core body comprises the following steps:
and casting the liquid silicon rubber on the lightning arrester core body, and curing the liquid silicon rubber into the insulating layer.
The application has the following beneficial effects:
the application provides a restrain arrester of resistance card flashover and assembly method thereof through being provided with at least one metal cushion between two adjacent resistance cards for can adjust the distance between two adjacent resistance cards, and can adjust the height of whole arrester core. The insulating layer that sets up on the outside wall of arrester core can restrain flashover electric arc when one of them resistance chip is defective for electric arc is restricted in the surface development of insulating layer, effectively keeps apart and protects adjacent normal resistance chip, avoids single resistance chip defect to lead to the trouble of whole arrester.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic half-section view of an internal structure of a lightning arrester for suppressing flashover of a resistor disc according to an embodiment of the invention;
fig. 2 is a schematic flow chart of an assembly method of the arrester for suppressing the flashover of the resistor disc, according to the arrester for suppressing the flashover of the resistor disc provided by the embodiment of the invention.
The device comprises a metal cushion block 1, a resistor disc 2, an insulating rod 3, an insulating layer 4, a metal connecting block 5, a metal end cover 6 and a connecting part 7.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
Referring to fig. 1, the present application provides, in a first aspect, an arrester for suppressing a flashover of a resistor disc, including: the lightning arrester core body comprises a plurality of coaxially arranged resistance cards 2 and metal cushion blocks 1 arranged at two ends of each resistance card 2; a fixing device that fixes the surge arrester core body by clamping both ends of the surge arrester core body; the insulating layer 4 covers the lightning arrester core body and the outer side of the fixing device, and a plurality of rubber rings distributed along the axial direction of the insulating layer 4 are arranged on the outer peripheral wall of the insulating layer 4; the lightning arrester comprises metal end covers 6, wherein the two metal end covers 6 are respectively arranged at two ends of the lightning arrester core body, at least one metal end cover 6 is provided with a connecting part 7, and the connecting part 7 is used for fixing the lightning arrester and connecting the lightning arrester in series.
The interval of two adjacent resistance card 2 has been guaranteed to metal cushion 1 that sets up between two resistance card 2 to can adjust the height of whole arrester core, fixing device adopts a plurality of insulator spindle 3 (for example epoxy pole) evenly to encircle the setting in the outside circumference of arrester core, each epoxy pole all with the axial direction parallel of arrester core, through the fastener at the axial both ends of each epoxy pole and arrester core with each metal cushion 1 and each arrester core fastening connection together. The insulating layer 4 is arranged outside the lightning arrester core body and each insulating rod 3, and the insulating layer 4 plays a role in protecting the lightning arrester core body.
In the embodiment, the outer diameter of the resistor disc 2 is equal to that of the metal cushion block 1, and the equal outer diameter ensures that the insulating layer 4 is convenient to arrange. It should be understood that the diameter of each resistive sheet 2 and each metal spacer 1 may be of increasing or decreasing value, so as to be able to form a shuttle-type lightning conductor core.
The insulating layer 4 is made of silicon rubber, the silicon rubber has good insulating performance, can resist corona and electric arc, and has high-temperature stability, so that the insulating layer is suitable for being arranged on a lightning arrester core body to inhibit flashover electric arc of the defective resistor disc 2, and normal operation of the normal resistor disc 2 is further guaranteed.
In this embodiment, the insulating layer 4 is provided on the lightning arrester core by means of casting. Specifically, by using liquid silicon rubber to be poured on the resistor chip, after the liquid silicon rubber is solidified, the insulating layer 4 is attached to the outer portion of the lightning arrester core body, and the insulating protection of the lightning arrester core body is guaranteed.
The fixing device includes: a plurality of insulating rods 3, the insulating rods 3 being arranged in parallel with the surge arrester core body, the insulating rods 3 being arranged in a circumferential direction of the surge arrester core body; the metal connecting blocks 5 are arranged at two ends of the lightning arrester core body respectively, and the metal connecting blocks 5 are connected with the insulating rods 3 respectively. The lightning arrester core body is connected in a clamping mode through the plurality of insulating rods 3 and the metal connecting blocks 5, and the structural stability of the lightning arrester core body is guaranteed.
In this embodiment, when the liquid silicone rubber is cast, the insulating rods 3 are cast in the liquid silicone rubber together with the fixing device, and the insulating layer 4 is formed after the liquid silicone rubber is cured. It should be understood that, when the liquid silicone rubber is cast, the lightning arrester core body fixed by the fixing device may be placed in a casting mold, and then the liquid silicone rubber is injected, and the casting mold may be removed after it is cured.
A plurality of metal cushion blocks 1 are arranged between every two adjacent resistance cards 2, the thickness of each metal cushion block 1 is larger than or equal to 20mm, so that any two adjacent resistance cards 2 are not in direct contact, the defect resistance card 2 cannot burn and damage the adjacent normal resistance card 2 when one of the resistance cards 2 is defective, and the internal electric arc caused by the defect resistance card 2 is effectively inhibited through the insulating layer 4 arranged on the peripheral wall of each resistance card 2.
Referring to fig. 1 and 2, in a second aspect, the present application provides a method of assembling an arrester for suppressing a flashover of a resistor disc, including: acquiring parts of a lightning arrester and liquid silicon rubber; secondly, connecting the resistance cards 2 and the metal cushion blocks 1 in series at intervals in sequence; step three, adjusting the height of the lightning arrester core body by adopting the metal cushion blocks 1, and adjusting and fixing devices to fix the resistance cards 2 and the metal cushion blocks 1; and step four, arranging an insulating layer 4 on the arrester core body.
In this embodiment, the method further includes: and fifthly, performing detection tests on the lightning arrester for at least 8 times to ensure that the normal resistance card 2 does not have flashover. It should be understood that before the lightning arrester is tested, a defective resistor disc 2 is arranged on the core body of the lightning arrester, and a preset energy is injected into the lightning arrester by using a surge current generator, so that the duration of the test current is at least 130ms, and the amplitude of the test current is 90-160A. The success of the assembly of the lightning arrester can be verified through the fifth step, so that the lightning arrester has good usability.
In the fourth step, the method for arranging the insulating layer 4 on the lightning arrester core body comprises the following steps: and pouring the liquid silicon rubber on the arrester core body, and curing the liquid silicon rubber into the insulating layer 4. Specifically, the thickness and the shape of the insulating layer 4 required can be formed by adopting a casting mold, the mold is favorable for forming the liquid silicone rubber, and the casting mold is detached after the liquid silicone rubber is cured.
The lightning arrester for inhibiting the flashover of the resistance cards and the assembling method thereof have the advantages that the at least one metal cushion block 1 is arranged between the two adjacent resistance cards 2, so that the distance between the two adjacent resistance cards 2 can be adjusted, and the height of the core body of the whole lightning arrester can be adjusted. The insulating layer 4 that sets up on the outside wall of arrester core can restrain flashover electric arc when one of them resistance card 2 has the defect for electric arc is restricted to the surface development of insulating layer 4, effectively keeps apart and protects adjacent normal resistance card 2, avoids single resistance card 2 defect to lead to the trouble of whole arrester.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. An arrester for suppressing flashover of a resistive patch, comprising:
the lightning arrester core body comprises a plurality of coaxially arranged resistance cards and metal cushion blocks arranged at two ends of each resistance card;
a fixing device that fixes the surge arrester core body by clamping both ends of the surge arrester core body;
the insulating layer is coated on the outer sides of the lightning arrester core body and the fixing device, and a plurality of rubber rings distributed along the axial direction of the insulating layer are arranged on the outer peripheral wall of the insulating layer;
the lightning arrester comprises a lightning arrester core body, metal end covers and at least one connecting part, wherein the metal end covers are arranged at two ends of the lightning arrester core body respectively, and the connecting part is arranged on at least one of the metal end covers and used for fixing the lightning arrester and connecting the lightning arrester in series.
2. The arrester of claim 1 wherein the resistive sheet has an outer diameter equal to an outer diameter of the metal spacer.
3. The arrester of claim 1 wherein the insulating layer is silicone rubber.
4. The arrester of claim 3 wherein the insulation layer is cast over the arrester core.
5. The arrester of claim 1 wherein the securing device comprises:
a plurality of insulating rods arranged in parallel with the surge arrester core body, the plurality of insulating rods being arranged in a circumferential direction of the surge arrester core body;
the metal connecting blocks are arranged at two ends of the lightning arrester core body respectively and are connected with the insulating rods respectively.
6. The arrester for suppressing the flashover of the resistor disc as claimed in claim 1, wherein a plurality of metal cushion blocks are arranged between each two adjacent resistor discs, and the thickness of each metal cushion block is more than or equal to 20 mm.
7. A method of assembling a surge arrester for suppressing flashover of a resistive patch, comprising:
acquiring parts of a lightning arrester and liquid silicon rubber;
secondly, connecting the resistance cards and the metal cushion blocks in series at intervals in sequence;
thirdly, adjusting the height of the lightning arrester core body by adopting the metal cushion blocks, and adjusting and fixing devices to fix the resistance cards and the metal cushion blocks;
and fourthly, arranging an insulating layer on the lightning arrester core body.
8. The method of assembling a surge arrester for suppressing flashover of a resistor disc as claimed in claim 7, further comprising:
and fifthly, performing detection tests on the lightning arrester for at least 8 times to ensure that the normal resistance card does not have flashover.
9. The method of claim 8, wherein before testing the lightning arrester, the lightning arrester core is provided with a defective resistor, and the surge current generator is used to inject a predetermined amount of energy into the lightning arrester to maintain the test current for at least 130ms and to maintain the test current at a magnitude of 90A to 160A.
10. The method of assembling a surge arrester according to claim 7, wherein the method of providing the insulating layer on the arrester core body is:
and pouring the liquid silicon rubber on the lightning arrester core body, and curing the liquid silicon rubber into the insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110616287.0A CN113393988A (en) | 2021-06-03 | 2021-06-03 | Arrester for inhibiting flashover of resistance card and assembling method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110616287.0A CN113393988A (en) | 2021-06-03 | 2021-06-03 | Arrester for inhibiting flashover of resistance card and assembling method thereof |
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| Publication Number | Publication Date |
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| CN113393988A true CN113393988A (en) | 2021-09-14 |
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| CN202110616287.0A Pending CN113393988A (en) | 2021-06-03 | 2021-06-03 | Arrester for inhibiting flashover of resistance card and assembling method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008218712A (en) * | 2007-03-05 | 2008-09-18 | Toshiba Corp | Arrester |
| CN201185110Y (en) * | 2007-09-06 | 2009-01-21 | 固力发电气有限公司 | Puncture type lightning protection insulator |
| CN106448976A (en) * | 2016-09-23 | 2017-02-22 | 国家电网公司 | High-altitude arrester for protecting +/-400kV DC transmission line |
| CN107680761A (en) * | 2017-09-18 | 2018-02-09 | 西安唯实输配电技术有限公司 | A kind of electric railway intelligent metal oxide arrester and preparation method |
| CN108053958A (en) * | 2017-12-20 | 2018-05-18 | 国网湖南省电力有限公司 | A kind of arrester |
| CN110211755A (en) * | 2019-05-31 | 2019-09-06 | 国网湖南省电力有限公司 | Cage lightning arrester insulating cylinder and explosion-proof lightning arrester |
| CN215220403U (en) * | 2021-06-03 | 2021-12-17 | 中国电力科学研究院有限公司 | Lightning arrester for inhibiting flashover of resistor disc |
-
2021
- 2021-06-03 CN CN202110616287.0A patent/CN113393988A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008218712A (en) * | 2007-03-05 | 2008-09-18 | Toshiba Corp | Arrester |
| CN201185110Y (en) * | 2007-09-06 | 2009-01-21 | 固力发电气有限公司 | Puncture type lightning protection insulator |
| CN106448976A (en) * | 2016-09-23 | 2017-02-22 | 国家电网公司 | High-altitude arrester for protecting +/-400kV DC transmission line |
| CN107680761A (en) * | 2017-09-18 | 2018-02-09 | 西安唯实输配电技术有限公司 | A kind of electric railway intelligent metal oxide arrester and preparation method |
| CN108053958A (en) * | 2017-12-20 | 2018-05-18 | 国网湖南省电力有限公司 | A kind of arrester |
| CN110211755A (en) * | 2019-05-31 | 2019-09-06 | 国网湖南省电力有限公司 | Cage lightning arrester insulating cylinder and explosion-proof lightning arrester |
| CN215220403U (en) * | 2021-06-03 | 2021-12-17 | 中国电力科学研究院有限公司 | Lightning arrester for inhibiting flashover of resistor disc |
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