CN106953241A - Gas-insulated transmission line - Google Patents
Gas-insulated transmission line Download PDFInfo
- Publication number
- CN106953241A CN106953241A CN201710268197.0A CN201710268197A CN106953241A CN 106953241 A CN106953241 A CN 106953241A CN 201710268197 A CN201710268197 A CN 201710268197A CN 106953241 A CN106953241 A CN 106953241A
- Authority
- CN
- China
- Prior art keywords
- conductor
- protective case
- gas
- housing
- transmission line
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/202—Cable lay-outs
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/063—Totally-enclosed installations, e.g. in metal casings filled with oil or gas
Abstract
The invention discloses a kind of gas-insulated transmission line; include the piping unit of some connections; each piping unit includes housing, the disc insulator for being arranged on housing two ends, conductor and the insulation compressed gas that is arranged on housing and conductor through disc insulator; protective case is arranged with outside the conductor; the protective case, which is each passed through two disc insulators and sealing is formed between protective case and disc insulator, to be coordinated, and the protective case inwall is provided with to be contradicted conductor to realize the clamping element for fixing conductor under the effect of housing interior insulation compressed gas.When conductor is assembled, clamping element will not produce squeezing action to conductor, and the conductor during installing conductor can be avoided the phenomenon worn and torn occur to a certain extent.
Description
Technical field
The present invention relates to a kind of transmission line of electricity, more specifically, it relates to a kind of gas-insulated transmission line.
Background technology
Traditional power transmission mode mainly is made up of overhead transmission line and cable run at present, overhead transmission line exist line loss greatly,
Easily influenceed by amblent air temperature factor, consume the defects such as big quantity space and land resource, and although cable run can be applied to city
Underground transmission, but it equally exists the problem of line loss is big, capacitance current is big, and the sectional area of cable run has almost reached at present
Technology and the economic limit, current-carrying capacity are restricted, it is necessary to be equipped with reactive power compensator and cooling system.
Regarding to the issue above, Application No. 201420093317.X Chinese patent, it discloses a kind of gas-insulated electricity
Circuit, includes the piping unit of some connections, and each piping unit includes housing, the conductor in the housing, is arranged on
The disc insulator at housing two ends and the insulating gas being arranged between the housing and the conductor, the housing include gold
Belong to layer and composite layer, the metal level constitutes metal tube, and the composite layer constitutes multiple tube.Due to conductor and housing
Between be filled with insulating gas, the insulating properties and current-carrying capacity of transmission line of electricity can be effectively increased.
But, when the circuit is under long-time use, damage phenomenon occurs in its conductor, therefore is accomplished by carrying out conductor
Change, because conductor is that, through disc insulator, disc insulator can play good position-limiting action, therefore benzvalene form to conductor
Cooperation between insulator and conductor is often compared closely, and when installing conductor, conductor be need to be each passed through it is multiple
Disc insulator, so as to cause easily occur wear phenomenon in conductor installation process, the normal of influence conductor is used.
The content of the invention
It is an object of the invention to provide a kind of gas-insulated transmission line, it has effectively subtracts during installing conductor
The effect of few conductor abrasion.
The present invention above-mentioned technical purpose technical scheme is that：A kind of gas insulation electric power line
Road, includes the piping unit of some connections, and each piping unit includes housing, is arranged on the disc insulator at housing two ends, passes through
Protection is arranged with outside the conductor of disc insulator and the insulation compressed gas being arranged between housing and conductor, the conductor
Set, the protective case, which is each passed through two disc insulators and sealing is formed between protective case and disc insulator, to be coordinated, described to protect
Jacket inner wall is provided with to be contradicted conductor to realize the clamping element for fixing conductor under the effect of housing interior insulation compressed gas.
By above-mentioned setting, during circuit is installed, disc insulator is first fixed on to the two ends of housing, then will
Protective case passes through disc insulator, and now then conductor is extend into guarantor by protective case by disc insulator to effectively fixing
In sheath, due to not being passed through insulation compressed gas in now housing, therefore clamping element will not play a clamping work to conductor
With conductor can be penetrated into very easily in protective case, and conductor will not be worn in whole process；When conductor is worn into completion
Afterwards, toward insulation compressed gas is filled with housing, with being constantly filled with for gas, the pressure in housing can be increasing, therefore
Clamping element can grip effect well under the pressure towards conductor motion so as to be played to conductor.And work as makes in circuit
After a period of time, the phenomenon of damage occurs in conductor, and when needing to change conductor, by the insulation pressure in housing
Contracting gas is bled off, and now clamping element is no longer clamped to conductor, so that the unloading process of conductor is very convenient.
It is preferred that, the clamping element includes the swelling gasbag being circumferentially overlying on protective case inner ring surface and through protective case side
Wall and the air-filled pore connected with swelling gasbag inside.
By above-mentioned setting, when installing conductor, due to not being passed through insulation compressed gas in housing, therefore now
Air bag is in shrivelled state, and conductor can be penetrated into very easily in protective case, and it will not be ground during penetrating
Damage；After conductor is worn into completion, toward housing in pour insulation compressed gas, the compressed gas can be entered in air bag, and
With being constantly filled with for gas, the pressure in housing is increasing, accordingly, and air bag can constantly expand, so as to be risen to conductor
To good clamping action, prevent conductor from shaking phenomenon occur in protective case to a certain extent and influence normal transmission.
It is preferred that, the clamping element includes coordinating through the through hole being arranged on the wall of protective case side, with through hole sealing sliding
And one end can be with leading grip block that body sidewall offsets and being set on grip block and make grip block and elastic component free of conductors.
By above-mentioned setting, when installing conductor, first conductor is penetrated into protective case, and due to not leading in housing
Enter the compressed gas that insulate, therefore grip block will not play a part of a clamping to conductor, so that being passed to by conductor
During in protective case, conductor is not in the phenomenon of abrasion, it is ensured that the normal transmission work of circuit；Conductor is worn into completion
Afterwards, toward insulation compressed gas is passed through in housing, with being constantly filled with for its gas, the pressure in housing constantly increases, and due to protecting
Pressure in sheath is constant, therefore now grip block can be in the presence of insulation compressed gas towards conductor motion, so as to leading
Body is played grips effect well.
It is preferred that, one end covering elasticity layer that the grip block is contradicted with conductor.
By above-mentioned setting, because elastic layer possesses certain elasticity capacity, therefore its can grip block and conductor it
Between play good cushioning effect, grip block damage for being caused to conductor during conductor is clamped is prevented to a certain extent.
It is preferred that, one end of the elastic layer counter conductor is provided with several salient points.
By above-mentioned setting, the presence of salient point can be effectively increased the contact area between grip block and conductor, and work as and connect
After contacting surface product increase, the frictional force between grip block and conductor can also increase, so as to be further ensured that grip block to wire
Clamping action.
It is preferred that, it is provided with and is sealed with protective case on the through hole coordinated, the side wall of the through hole on the disc insulator
The sealing strip of sealing between increase through-hole side wall and protective case is provided with, the disc insulator is set with respect to one end of housing
There is under insulation compressed gas effect crush seal bar to increase the extrusion of sealing between sealing strip and protective case.
By above-mentioned setting, the presence of sealing strip can be effectively increased the sealing between conductor and through-hole side wall；And
In the course of normal operation of circuit, it can compare due to filling the pressure in completely insulation compressed gas, therefore housing in housing
Height, and overstock part and can be moved in the presence of the pressure towards sealing strip, so that being against on conductor tightly by sealing strip, can
It is effectively increased the sealing between conductor and through-hole side wall.
It is preferred that, the extrusion include through be arranged on disc insulator with respect to shell one end the first slip hole, set
Put on disc insulator and the second slip hole of the first slip hole of connection and through hole and the first slider bore seal what sliding coordinated
Slipping block and the sealing of the second slip hole, which slide the crushing block coordinated and be arranged on, makes what both linked between crushing block and slipping block
STATEMENT OF FEDERALLY SPONSORED.
By above-mentioned setting, when circuit is during normal work, due to filling full compressed gas, therefore shell in housing
Internal pressure can be than larger, and the direction that slipping block can be away from housing in the presence of the pressure is moved, and in sliding
During block is moved, due to there is the presence of STATEMENT OF FEDERALLY SPONSORED, therefore slipping block can drive crushing block to be moved towards the direction of sealing strip,
So that crushing block pushes against sealing strip, the sealing between through-hole side wall and conductor is further ensured that.
It is preferred that, the STATEMENT OF FEDERALLY SPONSORED include the oblique dovetails that are arranged on slipping block and be arranged on crushing block and with oblique swallow
The oblique dovetail groove that tail block coordinates.
By above-mentioned setting, when direction of the slipping block in housing in the presence of pressure away from housing is slided, by
In the cooperation of oblique dovetails and oblique dovetail groove, therefore crushing block can be moved in the presence of slipping block towards the direction of conductor, from
And enable crushing block crush seal bar, it is effectively increased the sealing between conductor and through-hole side wall.
It is preferred that, protective case side wall is provided with several limiting sections, and the limiting section is arranged on including two protrusions
The depressed part coordinated with disc insulator is formed between protuberance on protective case outer wall, adjacent two protuberance.
By above-mentioned setting, after the assembling of protective case and disc insulator is completed, disc insulator can snap onto recessed
In the portion of falling into, so as to effectively prevent that protective case from sliding phenomenon occur along shell length direction.
It is preferred that, the cross sectional shape of the protuberance is circular arc.
By above-mentioned setting, the structure of arc, when disc insulator is assembled with protective case, enable protuberance compared with
Readily to there is deformation phenomenon, facilitate the installation of disc insulator and protective case.
In summary, the invention has the advantages that：
1. by setting clamping element, during conductor is assembled, clamping element will not play a part of clamping to conductor, effectively keep away
Exempt from conductor and occur the phenomenon damaged because of abrasion during installation；
2. the insulating properties between conductor and disc insulator can be effectively increased；
3. disc insulator can play good position-limiting action to protective case, prevent that protective case from moving in housing.
Brief description of the drawings
Fig. 1 is the structure chart of embodiment one；
Fig. 2 is the enlarged drawing of part A in Fig. 1；
Fig. 3 is the structure chart of slipping block in embodiment one；
Fig. 4 is the structure chart of crushing block in embodiment one；
Fig. 5 is the structure chart of embodiment two；
Fig. 6 is the structure chart of part B in Fig. 5.
In figure：1st, housing；2nd, disc insulator；21st, the first slip hole；22nd, the second slip hole；3rd, protuberance；4th, protect
Set；5th, conductor；6th, clamping element；61st, air-filled pore；62nd, air bag；63rd, grip block；64th, spring；65th, through hole；7th, slipping block；8th, squeeze
Briquetting；81st, oblique dovetail groove；9th, oblique dovetails；10th, elastic layer；11st, salient point；12nd, sealing strip.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment one:
A kind of gas-insulated transmission line, referring to Figures 1 and 2, includes the piping unit of several connections, piping unit includes circle
The housing 1 of tubular and the disc insulator 2 for being fixed on piping unit two ends, are provided through through hole 65 on disc insulator 2,
Through hole 65 through direction it is parallel with the axis direction of housing 1；Protective case 4 is provided with housing 1, protective case 4 is each passed through
Through hole 65 on two disc insulators 2, the through hole 65 is shaped as circle, on the side wall of through hole 65 covered with rubber strip, should
The cross sectional shape of rubber strip is the circular rings being arranged concentrically with through hole 65.It is provided with disc insulator 2 with respect to one end of housing 1
4 under insulation compressed gas effect crush seal bar 12 to increase the extrusion of sealing between sealing strip 12 and protective case 4.
The extrusion is arranged on the first cunning including running through the first slip hole 21 for being arranged on the relative one end of housing 1 of disc insulator 2, sliding
The slipping block 7 moved in hole 21, the second slip hole 22 for being arranged on the side wall of the first slip hole 21 and being communicated with through hole 65, sliding are set
Crushing block 8 in the second slip hole 22 and the STATEMENT OF FEDERALLY SPONSORED being arranged between crushing block 8 and slipping block 7, with reference to Fig. 3, STATEMENT OF FEDERALLY SPONSORED
Including the oblique dovetails 9 being arranged on slipping block 7 and the oblique dovetail groove 81 for being arranged on crushing block 8 and coordinating with oblique dovetails 9.
Referring to Figures 1 and 2, the outer wall of protective case 4 is provided with several limiting sections, and the limiting section includes two circular arc
Protuberance 3, the protuberance 3 is made up of elastomeric material, and the depression coordinated with disc insulator 2 is formed between two protuberances 3
Portion, good position-limiting action is played so as to the axial direction to protective case 4.
The internal diameter of conductor 5 and protective case 4 that cylinder is equipped with protective case 4 is greater than the diameter of conductor 5, in protection
It is provided with the inner ring surface of pipe and contradicts conductor 5 to realize the clamping for fixing conductor 5 under the effect of the interior insulation compressed gas of housing 1
Part 6, clamping element 6 include being circumferentially overlying in swelling gasbag 62 on the inner ring surface of protective case 4 and through the side wall of protective case 4 and with expansion
The air-filled pore 61 communicated inside air bag 62, the length of swelling gasbag 62 is identical with the length of protective case 4.
Assembling process：Disc insulator 2 is first arranged on to the two ends of housing 1, protective case 4 is then passed through into disc insulator
Through hole 65 in 2, during protective case 4 is worn, first deforms upon the protuberance 3 on protective case 4, then makes benzvalene form exhausted
Edge 2 is snapped onto in adjacent two protuberance 3, then no longer forces in protuberance 3, after protuberance 3 recovers, disc insulator 2 blocks
It is embedded in depressed part, so as to play good position-limiting action to protective case 4；Meanwhile, now protective case 4, disc insulator 2 and shell
The space of sealing is formed between body 1.Then, conductor 5 is passed in protective case 4, because now air bag 62 is in shrivelled state,
Therefore air bag 62 can be penetrated into very easily in protective case 4, be not in the phenomenon of abrasion.
Conductor 5 is worn after finishing, toward housing 1 in pour insulation compressed gas, the insulation compressed gas is empty for compression
Gas, can be prevented effectively from pollution on the environment after insulation leakage of compressed gas.And with the continuous injection of compressed air, shell
Pressure in body 1 constantly increases, now, and most compressed gas can be entered in air bag 62 so that air bag 62 occur it is swollen
Swollen phenomenon, and then good fixation can be played to conductor 5；And at the same time, the pressure in housing 1 can also drive cunning
Move block 7 move, slipping block 7 can drive crushing block 8 to be moved towards sealing strip 12, thus by sealing strip 12 tightly be against protective case
On 4, the sealing between increase disc insulator 2 and protective case 4 prevents that the air in housing 1 from leaking to a certain extent.
Embodiment two：
A kind of gas-insulated transmission line, reference picture 5 and Fig. 6, the present embodiment and the difference of embodiment one are, in the present embodiment
Clamping element 6 include through be arranged on through hole 65 on the side wall of protective case 4, with the sealing sliding cooperation of through hole 65 and one end can be with leading
The grip block 63 that the side wall of body 5 offsets and the elastic component being set on grip block 63；Wherein, elastic component is spring 64, spring 64
One end is fixedly connected with grip block 63, and the other end is fixedly connected with the side wall of through hole 65；In grip block 63 with respect to the one of protective case 4
It is made up, is set on end face of the elastic layer 10 with respect to protective case 4 of elastomeric material covered with elastic layer 10, the elastic layer 10 on end
There are several salient points 11.
After conductor 5 is worn in protective case 4, toward housing 1 in pour compressed gas, it is continuous with compressed gas
It is filled with, the pressure in housing 1 is increasing, grip block 63 can be moved in the presence of the pressure towards protective case 4, so as to realize
Effective fixation to protective case 4.And the presence of elastic layer 10, grip block 63 can be avoided to a certain extent to protective case 4
Damage.
This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art
Member can make the modification without creative contribution to the present embodiment as needed after this specification is read, but as long as at this
All protected in the right of invention by Patent Law.
Claims (10)
1. a kind of gas-insulated transmission line, includes the piping unit of some connections, each piping unit includes housing (1), set
Disc insulator (2) at housing (1) two ends, through disc insulator (2) conductor (5) and be arranged on housing (1) with leading
Insulation compressed gas between body (5), it is characterized in that：Protective case (4), the protective case (4) point are arranged with outside the conductor (5)
Form sealing not through two disc insulators (2) and protective case (4) and disc insulator (2) to coordinate, the protective case (4)
Inwall is provided with to be contradicted conductor (5) to realize to the fixed clamping element of conductor (5) under the effect of housing (1) interior insulation compressed gas
(6)。
2. gas-insulated transmission line according to claim 1, it is characterized in that：The clamping element (6) includes circumferential cover
Swelling gasbag (62) on protective case (4) inner ring surface and through protective case (4) side wall and with being connected inside swelling gasbag (62)
Air-filled pore (61).
3. gas-insulated transmission line according to claim 1, it is characterized in that：The clamping element (6) is included through setting
Through hole (65) and through hole (65) sealing sliding cooperation and one end on the wall of protective case (4) side can offset with conductor (5) side wall
Grip block (63) and the elastic component for being set on grip block (63) and making grip block (63) to be separated with conductor (5).
4. gas-insulated transmission line according to claim 3, it is characterized in that：The grip block (63) is supported with conductor (5)
Tactile one end covering elasticity layer (10).
5. gas-insulated transmission line according to claim 4, it is characterized in that：Elastic layer (10) counter conductor (5)
One end be provided with several salient points (11).
6. gas-insulated transmission line according to claim 1, it is characterized in that：It is provided with the disc insulator (2)
Sealed with protective case (4) and increase through hole (65) side wall is provided with the through hole (65) coordinated, the side wall of the through hole (65) with protecting
The sealing strip (12) of sealing between sheath (4), the disc insulator (2) is provided with insulation with respect to one end of housing (1)
Compressed gas acts on lower crush seal bar (12) to increase the extrusion of sealing between sealing strip (12) and protective case (4).
7. gas-insulated transmission line according to claim 6, it is characterized in that：The extrusion, which includes running through, is arranged on basin
Formula insulator (2) with respect to housing (1) one end the first slip hole (21), be arranged on disc insulator (2) and connect first slide
Move hole (21) and the second slip hole (22) of through hole (65) and the first slider bore seals the slipping block (7) and second that sliding coordinates
Slip hole (22) sealing, which slides the crushing block (8) coordinated and is arranged on, makes what both linked between crushing block (8) and slipping block (7)
STATEMENT OF FEDERALLY SPONSORED.
8. gas-insulated transmission line according to claim 7, it is characterized in that：The STATEMENT OF FEDERALLY SPONSORED includes being arranged on slipping block
(7) oblique dovetails (9) on and the oblique dovetail groove (81) for being arranged on crushing block (8) and coordinating with oblique dovetails (9).
9. gas-insulated transmission line according to claim 1, it is characterized in that：The protective case (4) is if side wall is provided with
Dry limiting section, the limiting section includes the protuberance (3) that two protrusions are arranged on protective case (4) outer wall, adjacent two protrusion
The depressed part coordinated with disc insulator (2) is formed between portion (3).
10. gas-insulated transmission line according to claim 9, it is characterized in that：The cross sectional shape of the protuberance (3) is
Circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710268197.0A CN106953241B (en) | 2017-04-22 | 2017-04-22 | gas-insulated transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710268197.0A CN106953241B (en) | 2017-04-22 | 2017-04-22 | gas-insulated transmission line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106953241A true CN106953241A (en) | 2017-07-14 |
| CN106953241B CN106953241B (en) | 2018-11-30 |
Family
ID=59477345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710268197.0A Expired - Fee Related CN106953241B (en) | 2017-04-22 | 2017-04-22 | gas-insulated transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106953241B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649543A (en) * | 2018-06-26 | 2020-01-03 | 江苏中顺电气有限公司 | Power transmission bus |
| CN112053814A (en) * | 2020-09-07 | 2020-12-08 | 孙水平 | Ceramic insulator convenient to wind and install for high-voltage power transmission |
| CN112510618A (en) * | 2020-10-12 | 2021-03-16 | 美嘉科技（镇江）有限公司 | Insulating bus duct device |
| WO2021102868A1 (en) * | 2019-11-27 | 2021-06-03 | 扬州仁智信息科技有限公司 | Copper-aluminum composite bus duct |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446617A (en) * | 2008-05-27 | 2009-06-03 | 中国电力科学研究院 | Test apparatus of DC gas insulated metal enclosed transmission line (GIL) |
| CN102207417A (en) * | 2010-03-29 | 2011-10-05 | Ls电线有限公司 | Leakage detection device for gas insulated transmission line |
| CN203787922U (en) * | 2014-03-03 | 2014-08-20 | 江苏神马电力股份有限公司 | Gas insulation power transmission line |
| CN204144856U (en) * | 2014-05-31 | 2015-02-04 | 平顶山电力设计院有限公司 | A kind of gas insulation electric power line |
| CN104362565A (en) * | 2014-11-06 | 2015-02-18 | 中国西电电气股份有限公司 | Ultrahigh-voltage resin-impregnated paper capacitive wall bushing |
| CN104538916A (en) * | 2014-11-14 | 2015-04-22 | 北京电力设备总厂有限公司 | Detachable bus unit and rigid gas insulation electric transmission line |
-
2017
- 2017-04-22 CN CN201710268197.0A patent/CN106953241B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446617A (en) * | 2008-05-27 | 2009-06-03 | 中国电力科学研究院 | Test apparatus of DC gas insulated metal enclosed transmission line (GIL) |
| CN102207417A (en) * | 2010-03-29 | 2011-10-05 | Ls电线有限公司 | Leakage detection device for gas insulated transmission line |
| CN203787922U (en) * | 2014-03-03 | 2014-08-20 | 江苏神马电力股份有限公司 | Gas insulation power transmission line |
| CN204144856U (en) * | 2014-05-31 | 2015-02-04 | 平顶山电力设计院有限公司 | A kind of gas insulation electric power line |
| CN104362565A (en) * | 2014-11-06 | 2015-02-18 | 中国西电电气股份有限公司 | Ultrahigh-voltage resin-impregnated paper capacitive wall bushing |
| CN104538916A (en) * | 2014-11-14 | 2015-04-22 | 北京电力设备总厂有限公司 | Detachable bus unit and rigid gas insulation electric transmission line |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649543A (en) * | 2018-06-26 | 2020-01-03 | 江苏中顺电气有限公司 | Power transmission bus |
| WO2021102868A1 (en) * | 2019-11-27 | 2021-06-03 | 扬州仁智信息科技有限公司 | Copper-aluminum composite bus duct |
| CN112053814A (en) * | 2020-09-07 | 2020-12-08 | 孙水平 | Ceramic insulator convenient to wind and install for high-voltage power transmission |
| CN112053814B (en) * | 2020-09-07 | 2022-08-09 | 孙水平 | Ceramic insulator convenient to wind and install for high-voltage power transmission |
| CN112510618A (en) * | 2020-10-12 | 2021-03-16 | 美嘉科技（镇江）有限公司 | Insulating bus duct device |
| CN112510618B (en) * | 2020-10-12 | 2022-04-08 | 美嘉科技（镇江）有限公司 | Insulating bus duct device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106953241B (en) | 2018-11-30 |
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Granted publication date: 20181130 Termination date: 20210422 |