CN203553032U - Outdoor vacuum circuit breaker used for electrified railway traction system - Google Patents
Outdoor vacuum circuit breaker used for electrified railway traction system Download PDFInfo
- Publication number
- CN203553032U CN203553032U CN201320668105.5U CN201320668105U CN203553032U CN 203553032 U CN203553032 U CN 203553032U CN 201320668105 U CN201320668105 U CN 201320668105U CN 203553032 U CN203553032 U CN 203553032U
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- pouring seat
- insulation pouring
- terminal block
- pole
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- 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
Links
- 238000009413 insulation Methods 0.000 claims abstract description 84
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 239000003822 epoxy resin Substances 0.000 claims abstract description 5
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 5
- 238000005452 bending Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000005266 casting Methods 0.000 abstract 7
- 239000007789 gas Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Abstract
The utility model discloses an outdoor vacuum circuit breaker used for an electrified railway traction system, which comprises a cross beam, a solid-sealed polar pole and a mechanism box. The solid-sealed polar pole comprises an upper polar pole, a wiring board, a lower polar pole and an insulation pull rod; the upper polar pole comprises a vacuum interrupter, an upper wiring terminal, a buffer layer surrounding the vacuum interrupter and an upper insulation casting seat cast by adopting epoxy resin; the lower polar pole is provided with a lower insulation casting seat, the upper insulation casting seat, the lower insulation casting seat and the wiring board are fixedly connected together, the wiring board is located between the upper insulation casting seat and the lower insulation casting seat, and the dynamic end of the vacuum interrupter is electrically connected with the wiring board; a driving piece is in transmission connection with the insulation pull rod, the insulation pull rod passes through the lower insulation casting seat and the wiring board and is connected with the dynamic end of the vacuum interrupter so as to drive the dynamic end to move. The outdoor vacuum circuit breaker used for an electrified railway traction system has the above advantages of reducing operational accidents of the circuit breaker, reducing the operation cost and increasing reliability.
Description
Technical field
The utility model relates to a kind of outdoor vacuum circuit breaker for electrified railroad traction system.
Background technology
The existing outdoor breaker for electrified railroad traction system, mostly is vacuum circuit-breaker or the SF6 circuit breaker of of SF6 gas, nitrogen, dry air etc., making auxiliary group of insulation.These circuit breakers have the shortcoming of a general character: need carry out air seal, in the on-the-spot operation of product use procedure, easily leak air or gas in the phenomenon of water content bid, cause insulating capacity to decline, and then cause insulation fault or operation to report to the police.
Utility model content
The utility model provides the outdoor vacuum circuit breaker for electrified railroad traction system, and it has overcome the existing deficiency of outdoor vacuum circuit breaker in background technology.
The technical scheme adopting that the utility model solves its technical problem is:
For the outdoor vacuum circuit breaker of electrified railroad traction system, comprise crossbeam, be installed in the pole on crossbeam and be installed in the mechanism case of crossbeam, in this mechanism case, establish actuator; This pole comprises pole, terminal block, lower pole and insulated tension pole; On this, pole comprises vacuum interrupter, connects the upper connecting terminal of the quiet end of vacuum interrupter, the resilient coating of wrapped vacuum arc control device and the upper insulation pouring seat of employing poured with epoxy resin so that vacuum interrupter, resilient coating and upper connecting terminal are linked into an integrated entity; This lower pole has lower insulation pouring seat; On this, insulation pouring seat, lower insulation pouring seat and terminal block are fixed together, and terminal block is between upper insulation pouring seat and lower insulation pouring seat, and described movable end of vacuum arc extinguishing chamber and terminal block can be electrically connected to; This terminal block place is provided with through hole; This actuator insulated tension pole that is in transmission connection, this insulated tension pole through the through hole of lower insulation pouring seat and terminal block and the moved end that is connected vacuum interrupter can drive moved end activity.
Among one embodiment: this lower insulation pouring seat has upper port, and on this, insulation pouring seat has lower port, this lower port and the upper port bottom surface, terminal block top that is tightly connected respectively.
Among one embodiment: the quiet end of this upper connecting terminal and vacuum interrupter is affixed and electrical connection by double threaded screw.
Among one embodiment: described upper connecting terminal is revolving structure.
Among one embodiment: the external diameter of this terminal block is greater than insulation pouring seat external diameter, is greater than lower insulation pouring seat external diameter, and, the dead in line of this terminal block, upper insulation pouring seat and lower insulation pouring seat.
Among one embodiment: this mechanism case comprises each side plate, those side plates are fixedly attached into mechanism case; This mechanism case place establishes opening, and Ling She bindiny mechanism case is can cover the door-plate that connects opening; Fire proof heat-insulation layer is all equipped with in the inner side of this side plate and door-plate.
Among one embodiment: this lower insulation pouring seat upper port periphery stretches out into bulge loop; Separately establish screw, this tip of screw is through bulge loop, terminal block and be screwed onto insulation pouring seat bottom surface; Between the head of screw of this screw and bulge loop, establish radome.
Among one embodiment: also comprise one can strain electric fitting, by the connection between insulated tension pole and movable end of vacuum arc extinguishing chamber, electric fitting top is fixed and is electrically contacted movable end of vacuum arc extinguishing chamber, this electricity fitting bottom is fixed and is electrically contacted terminal block.
Among one embodiment: this electricity fitting comprises conducting strip, this conducting strip bending formation have conductive segment on, a side section that connects upper conductive segment one side to be connected the conductive segment of this side section with one, on this, conductive segment is established through hole, on this, conductive segment is above-mentioned electric fitting top, and this lower conductive segment is above-mentioned electric fitting bottom; This insulated tension pole upper end is convexly equipped with bulge loop, and this insulated tension pole upper end is from bottom to top through through hole affixed movable end of vacuum arc extinguishing chamber, and in this bulge loop contact, conductive segment bottom surface and upper conductive segment and movable end of vacuum arc extinguishing chamber are fixed and electrically contact.
Among one embodiment: this conducting strip bending also forms another the lower conductive segment that also has an opposite side section that connects upper conductive segment opposite side to be connected this opposite side section with, and these twice conductive segments lay respectively at insulated tension pole both sides.
The technical program is compared with background technology, and its tool has the following advantages:
Adopt pole structure, use Epoxy Resin to be enclosed in pole vacuum interrupter, without SF6 or auxiliary group of insulation form of other gas, do not exist the Insulation Problems that in gas leakage or gas, water content exceeds standard caused to occur, make circuit breaker be more suitable for the applied environment of electric railway vibration, high filth and frequent operation, can reduce the generation of circuit breaker interruption of service, reduce operating cost, increase reliability.
Between vacuum interrupter and upper insulation pouring seat, establish resilient coating, can play cushioning effect, improve sealing property, convenient manufacture, improves rate of finished products, reduces manufacturing cost.
The quiet end of upper connecting terminal and vacuum interrupter is affixed and electrical connection by double threaded screw, and convenient cast guarantees performance affixed and that be electrically connected to.
The external diameter of terminal block is greater than insulation pouring seat external diameter, is greater than lower insulation pouring seat external diameter, the dead in line of terminal block, upper insulation pouring seat and lower insulation pouring seat, terminal block outer peripheral edges are stretched out outside insulation pouring seat and lower insulation pouring seat, to improve electric field.
Tip of screw is through bulge loop, terminal block and be screwed onto insulation pouring seat bottom surface, convenient for assembly.Between the head of screw of screw and bulge loop, establish radome, to improve electric field.
Electricity fitting comprises conducting strip, conducting strip bending formation have upper conductive segment, side section and lower conductive segment, insulated tension pole upper end is from bottom to top through through hole affixed movable end of vacuum arc extinguishing chamber, conductive segment bottom surface in bulge loop contact, make conductive segment and movable end of vacuum arc extinguishing chamber fix and electrically contact, can guarantee that electric fitting is electrically connected to moved end, terminal block, product structure is simple, cost is low, long service life.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 has illustrated one of the structural representation of the one pole outdoor vacuum circuit breaker of a preferred embodiment.
Fig. 2 illustrated a preferred embodiment one pole outdoor vacuum circuit breaker structural representation two.
Fig. 3 has illustrated one of the structural representation of the pole of a preferred embodiment.
Fig. 4 has illustrated the A-A generalized section of Fig. 3.
Fig. 5 illustrated a preferred embodiment pole structural representation two.
Fig. 6 has illustrated the B-B generalized section of Fig. 5.
Fig. 7 has illustrated one of the structural representation of the bipolar outdoor vacuum circuit breaker of another preferred embodiment.
Fig. 8 illustrated another preferred embodiment bipolar outdoor vacuum circuit breaker structural representation two.
Fig. 9 illustrated another preferred embodiment bipolar outdoor vacuum circuit breaker structural representation three.
Embodiment
Please referring to Fig. 1 to Fig. 6, for the outdoor vacuum circuit breaker of electrified railroad traction system, comprise that a crossbeam 100, is installed in mechanism case 300 and support 400 that pole 200, on crossbeam 100 is installed in crossbeam 100, is one pole outdoor vacuum circuit breaker.
This crossbeam 100 comprises upper and lower two block plates 110, and this two block plate 110 is bent into U-shaped, after these two block plates, 110 bendings, with bolt, is fixedly spliced into crossbeam, or affixed by welding.This crossbeam 100 is fixed on support 400.
This pole 200 comprises pole 210, terminal block 220, lower pole 230 and insulated tension pole 240.
On this, pole 210 comprises upper connecting terminal 212, the resilient coating 213 of wrapped vacuum arc control device 211 of vacuum interrupter 211, connection vacuum interrupter 211 quiet ends and adopts the upper insulation pouring seat 214 of poured with epoxy resin so that vacuum interrupter 211, resilient coating 213 and upper connecting terminal 212 are linked into an integrated entity, and on this, insulation pouring seat 214 has lower port.Among the present embodiment: this upper connecting terminal 212 and the quiet end of vacuum interrupter 211 be affixed and electrical connection by double threaded screw 215; Described upper connecting terminal 212 is revolving structure, for example cylinder.This lower pole 230 has lower insulation pouring seat 231, and this lower insulation pouring seat 231 has upper port.The adaptive alignment of the upper port of the lower port of insulation pouring seat 214 and lower insulation pouring seat 231 on this.Among the present embodiment, on this, outside insulation pouring seat 214, lower insulation pouring seat 231, enclose and be all provided with size interval interlaced arrangement and even spaced apart a plurality of full skirts 280, make outer creepage distance can meet 44mm/kV, and the diameter of the part of the upper insulation pouring seat 214 of this correspondence upper connecting terminal 212 is less than the diameter of part of the upper insulation pouring seat 214 of corresponding vacuum interrupter 211.
This lower insulation pouring seat 231 is fixed in the end face middle part of crossbeam 100 by bolt.On this, insulation pouring seat 214, lower insulation pouring seat 231 and terminal block 220 are fixed together, and this terminal block 220 is fixed between insulation pouring seat 214 and lower insulation pouring seat 231, and, this lower port and the upper port bottom surfaces, terminal block 220 top that are tightly connected respectively.Among the present embodiment, the following structure of described affixed employing: these lower insulation pouring seat 231 upper port peripheries bulge loop 232 that stretches out; Separately establish screw 260, these screw 260 ends are through bulge loop 232, terminal block 220 and be screwed onto insulation pouring seat 214 bottom surfaces, with this, terminal block 220, upper insulation pouring seat 214 and lower insulation pouring seat 231 are fixed together; Best, 232 of the head of screw of this screw 260 and bulge loops are established radome 270.The structure example of sealing as: on this, 220 of insulation pouring seat 212 lower port and terminal blocks are established sealing ring 290, and these lower insulation pouring seat 231 upper port and 220 of terminal blocks are also established sealing ring 290.In one preferred version, the external diameter of this terminal block 220 is greater than insulation pouring seat 214 external diameters, is greater than lower insulation pouring seat 231 external diameters, and, the dead in line of this terminal block 220, upper insulation pouring seat 212 and lower insulation pouring seat 231, so that these terminal block 220 outer peripheral edges are stretched out outside insulation pouring seat 212, lower insulation pouring seat 213.
In this mechanism case 300, establish actuator 310, for example rotating shaft, this actuator 310 insulated tension pole 240 that is in transmission connection, for example, set firmly connecting lever in rotating shaft, by hinged this insulated tension pole lower end of connecting lever.This insulated tension pole 240 is through lower insulation pouring seat 231 and terminal block 220 and be connected the moved end of vacuum interrupter 211, dynamic equipment can drive actuator 310 activities, actuator 310 can drive insulated tension pole 240 activities, drives movable end of vacuum arc extinguishing chamber movable, to realize, closes a floodgate or separating brake.Certainly, described terminal block place is provided with the through hole passing for insulated tension pole, and through hole external diameter is greater than insulated tension pole external diameter.Among the present embodiment, this mechanism case 300 comprises each side plate, and those side plates are fixedly attached into casing to form mechanism case; This mechanism case place establishes opening, and Ling She bindiny mechanism case is can cover the door-plate that connects opening, and this door-plate is for example by sliding or being rotationally connected side plate; Best, fire proof heat-insulation layer is all equipped with in the inner side of this side plate and door-plate, and this side plate or door-plate adopt stainless steel or cover aluminium zine plate.
These vacuum interrupter 211 moved ends and terminal block 220 can be electrically connected to, and among the present embodiment, the electric fitting 250 by energy strain between these vacuum interrupter 211 moved ends and terminal block 220 is electrically connected to.By the connection between insulated tension pole and movable end of vacuum arc extinguishing chamber, electric fitting 250 tops are fixed and electrically contacted movable end of vacuum arc extinguishing chamber, this electricity fitting bottom is fixed and is electrically contacted terminal block.In one preferred version: this electricity fitting 250 comprises conducting strip, this conducting strip bending form has conductive segment 251, the two side sections 252 and two that connect respectively upper conductive segment 251 both sides on one to be connected respectively the lower conductive segment 253 of this both sides section, on this, conductive segment 251 is established through hole, on this, conductive segment is above-mentioned electric fitting top, and this lower conductive segment is above-mentioned electric fitting bottom.These insulated tension pole 240 upper ends are convexly equipped with bulge loop 241, these insulated tension pole 240 upper ends are from bottom to top through through hole affixed vacuum interrupter 211 moved ends, in these bulge loop 241 contacts, conductive segment 251 bottom surfaces make conductive segment 251 and vacuum interrupter 211 moved ends fix and electrically contact, and these twice conductive segments lay respectively at insulated tension pole both sides.The electric-conductor forming by conducting strip bending has elasticity, can upper and lower strain.
Among another preferred embodiment, it and a upper preferred embodiment difference are: please refer to Fig. 7, Fig. 8 and Fig. 9, bipolar outdoor vacuum circuit breaker for electrified railroad traction system, comprise that a crossbeam 100 ', two poles 200 ', that are installed on crossbeam 100 ' are installed in mechanism case 300 ' and the support 400 ' of crossbeam 100 ', it comprises two poles, forms bipolar outdoor vacuum circuit breaker.The structure of this pole 200 ' please refer to the structure of an embodiment.The lower insulation pouring seat of this two pole is all fixed in end face left and right two parts of crossbeam 100 ' by bolt.In this mechanism case 300 ', establish actuator, for example rotating shaft, this actuator insulated tension pole that is in transmission connection, for example, set firmly two connecting levers in rotating shaft, and two connecting levers are the insulated tension pole lower end of hinged these two poles respectively.
The above, it is only the utility model preferred embodiment, therefore can not limit according to this scope that the utility model is implemented, the equivalence of doing according to the utility model the scope of the claims and description changes and modifies, and all should still belong in the scope that the utility model contains.
Claims (10)
1. for the outdoor vacuum circuit breaker of electrified railroad traction system, comprise crossbeam, be installed in the pole on crossbeam and be installed in the mechanism case of crossbeam, in this mechanism case, establish actuator; It is characterized in that: this pole comprises pole, terminal block, lower pole and insulated tension pole; On this, pole comprises vacuum interrupter, connects the upper connecting terminal of the quiet end of vacuum interrupter, the resilient coating of wrapped vacuum arc control device and the upper insulation pouring seat of employing poured with epoxy resin so that vacuum interrupter, resilient coating and upper connecting terminal are linked into an integrated entity; This lower pole has lower insulation pouring seat; On this, insulation pouring seat, lower insulation pouring seat and terminal block are fixed together, and terminal block is between upper insulation pouring seat and lower insulation pouring seat, and described movable end of vacuum arc extinguishing chamber and terminal block can be electrically connected to; This terminal block place is provided with through hole; This actuator insulated tension pole that is in transmission connection, this insulated tension pole through the through hole of lower insulation pouring seat and terminal block and the moved end that is connected vacuum interrupter can drive moved end activity.
2. the outdoor vacuum circuit breaker for electrified railroad traction system according to claim 1, it is characterized in that: this lower insulation pouring seat has upper port, on this, insulation pouring seat has lower port, this lower port and the upper port bottom surface, terminal block top that is tightly connected respectively.
3. the outdoor vacuum circuit breaker for electrified railroad traction system according to claim 1, is characterized in that: the quiet end of this upper connecting terminal and vacuum interrupter is affixed and electrical connection by double threaded screw.
4. the outdoor vacuum circuit breaker for electrified railroad traction system according to claim 1, is characterized in that: described upper connecting terminal is revolving structure.
5. the outdoor vacuum circuit breaker for electrified railroad traction system according to claim 1, it is characterized in that: the external diameter of this terminal block is greater than insulation pouring seat external diameter, is greater than lower insulation pouring seat external diameter, and, the dead in line of this terminal block, upper insulation pouring seat and lower insulation pouring seat.
6. the outdoor vacuum circuit breaker for electrified railroad traction system according to claim 2, is characterized in that: this mechanism case comprises each side plate, and those side plates are fixedly attached into mechanism case; This mechanism case place establishes opening, and Ling She bindiny mechanism case is can cover the door-plate that connects opening; Fire proof heat-insulation layer is all equipped with in the inner side of this side plate and door-plate.
7. the outdoor vacuum circuit breaker for electrified railroad traction system according to claim 2, is characterized in that: this lower insulation pouring seat upper port periphery stretches out into bulge loop; Separately establish screw, this tip of screw is through bulge loop, terminal block and be screwed onto insulation pouring seat bottom surface; Between the head of screw of this screw and bulge loop, establish radome.
8. according to the outdoor vacuum circuit breaker for electrified railroad traction system described in any one in claim 1 to 7, it is characterized in that: the electric fitting that also comprises an energy strain, by the connection between insulated tension pole and movable end of vacuum arc extinguishing chamber, electric fitting top is fixed and electrically contacted movable end of vacuum arc extinguishing chamber, this electricity fitting bottom is fixed and is electrically contacted terminal block.
9. the outdoor vacuum circuit breaker for electrified railroad traction system according to claim 8, it is characterized in that: this electricity fitting comprises conducting strip, this conducting strip bending formation have conductive segment on, a side section that connects upper conductive segment one side to be connected the conductive segment of this side section with one, on this, conductive segment is established through hole, on this, conductive segment is above-mentioned electric fitting top, and this lower conductive segment is above-mentioned electric fitting bottom; This insulated tension pole upper end is convexly equipped with bulge loop, and this insulated tension pole upper end is from bottom to top through through hole affixed movable end of vacuum arc extinguishing chamber, and in this bulge loop contact, conductive segment bottom surface and upper conductive segment and movable end of vacuum arc extinguishing chamber are fixed and electrically contact.
10. the outdoor vacuum circuit breaker for electrified railroad traction system according to claim 9, it is characterized in that: this conducting strip bending also forms another the lower conductive segment that also has an opposite side section that connects upper conductive segment opposite side to be connected this opposite side section with, and these twice conductive segments lay respectively at insulated tension pole both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320668105.5U CN203553032U (en) | 2013-10-28 | 2013-10-28 | Outdoor vacuum circuit breaker used for electrified railway traction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320668105.5U CN203553032U (en) | 2013-10-28 | 2013-10-28 | Outdoor vacuum circuit breaker used for electrified railway traction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203553032U true CN203553032U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320668105.5U Expired - Lifetime CN203553032U (en) | 2013-10-28 | 2013-10-28 | Outdoor vacuum circuit breaker used for electrified railway traction system |
Country Status (1)
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| CN (1) | CN203553032U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935446A (en) * | 2015-12-31 | 2017-07-07 | 施耐德电气(厦门)开关设备有限公司 | Attachment means and circuit breaker polar |
| CN109036945A (en) * | 2018-09-22 | 2018-12-18 | 麦克奥迪（厦门）电气股份有限公司 | Gas-filling cabinet pole and preparation method thereof |
| CN109115435A (en) * | 2018-06-14 | 2019-01-01 | 中国电力科学研究院有限公司 | Extra-high-voltage alternating current switching mode controllable arrester separate structure and its antidetonation check method |
| CN114530299A (en) * | 2022-02-21 | 2022-05-24 | 电子科技大学中山学院 | High-voltage insulation device in low-temperature environment |
-
2013
- 2013-10-28 CN CN201320668105.5U patent/CN203553032U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935446A (en) * | 2015-12-31 | 2017-07-07 | 施耐德电气(厦门)开关设备有限公司 | Attachment means and circuit breaker polar |
| CN106935446B (en) * | 2015-12-31 | 2019-03-15 | 施耐德电气(厦门)开关设备有限公司 | Attachment device and circuit breaker polar |
| CN109115435A (en) * | 2018-06-14 | 2019-01-01 | 中国电力科学研究院有限公司 | Extra-high-voltage alternating current switching mode controllable arrester separate structure and its antidetonation check method |
| CN109036945A (en) * | 2018-09-22 | 2018-12-18 | 麦克奥迪（厦门）电气股份有限公司 | Gas-filling cabinet pole and preparation method thereof |
| CN114530299A (en) * | 2022-02-21 | 2022-05-24 | 电子科技大学中山学院 | High-voltage insulation device in low-temperature environment |
| CN114530299B (en) * | 2022-02-21 | 2023-05-05 | 电子科技大学中山学院 | High-voltage insulation device in low-temperature environment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |