CN111403224A - Extra-high voltage isolating switch main cutter bar protection device and isolating switch - Google Patents
Extra-high voltage isolating switch main cutter bar protection device and isolating switch Download PDFInfo
- Publication number
- CN111403224A CN111403224A CN202010134210.5A CN202010134210A CN111403224A CN 111403224 A CN111403224 A CN 111403224A CN 202010134210 A CN202010134210 A CN 202010134210A CN 111403224 A CN111403224 A CN 111403224A
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- isolating switch
- cutter bar
- extra
- high voltage
- main cutter
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/023—Base and stationary contacts mounted thereon
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model provides an extra-high voltage isolator owner cutter arbor protection device, includes: the anti-rotation part is arranged at the front end of the auxiliary moving contact; the limiting mechanism is provided with a guide groove which allows the anti-rotation part to horizontally rotate along with the auxiliary moving contact, the stroke of the guide groove is consistent with the horizontal rotation stroke of the auxiliary moving contact, and the caliber of the guide groove is used for preventing the anti-rotation part from overturning; and the fixed support is arranged on one side of the main fixed contact of the isolating switch and used for fixing the limiting mechanism. The invention can limit the motion trail of the auxiliary moving contact through the rotation prevention part and the limiting mechanism, and prevent the auxiliary moving contact from turning before the rotation prevention part completely passes through the guide groove, thereby limiting the motion trail of the main knife bar of the isolating switch and finally realizing the effect of preventing the main knife bar from turning in advance. The limiting mechanism can be flexibly mounted through the fixing support, and meanwhile, the fixing support and the limiting mechanism can be flexibly detached.
Description
Technical Field
The invention belongs to the field of isolating switches, and particularly relates to a main cutter bar protection device of an extra-high voltage isolating switch and the isolating switch.
Background
With the development of power grid utilities and power transmission projects, some extra-high voltage three-column horizontal rotation turnover type isolating switches with high-parameter bus conversion switching-on and switching-off capacity are already put into operation. The high-parameter bus conversion on-off capacity needs to add a small vacuum circuit breaker on a main conductive loop of an extra-high voltage three-column horizontal rotation overturning type isolating switch, so that the small vacuum circuit breaker can be driven to be closed and opened according to the closing and opening of a main knife rod of the extra-high voltage three-column horizontal rotation overturning type isolating switch. The switching-on of the extra-high voltage three-column horizontal rotation turnover type isolating switch is completed by two steps of horizontal rotation motion of the main cutter bar and turnover of the main cutter bar around the axis of the main cutter bar, if the horizontal rotation motion step of the main cutter bar (the active contacts at the two ends of the main cutter bar completely enter the main fixed contact) is not completed, the main cutter bar starts to turn over around the axis, the active contacts at the two ends of the main cutter bar cannot enter the main fixed contact and are clamped at the outer opening of the main fixed contact, and the switching-on failure is caused. Under normal conditions, the horizontal rotation motion of the main cutter bar is finished, the driving contacts at the two ends touch the innermost limiting pads of the main static contacts at the two sides and then are limited by resistance, and then the main cutter bar overturning self-holding force spring in the main cutter bar overturning transmission box starts to be compressed, so that the two-step action switching-on is realized.
When a main knife bar of the extra-high voltage three-column horizontal rotation turnover type isolating switch with high parameter bus conversion breaking capacity horizontally rotates to be close to a main static contact, an auxiliary moving contact arranged at the front end of the main static contact needs to toggle a miniature circuit breaker in an auxiliary loop to be switched on first, and then an active contact at the front end of the main knife bar enters the main static contact to be turned over. However, the force required for shifting the miniature circuit breaker to switch on may be increased after the service life of the isolating switch is too long, and meanwhile, the overturning holding force of the main cutter bar may be reduced, so that the extra-high voltage three-column horizontal rotation overturning type isolating switch can be overturned in advance due to the reason that the resistance is increased or the overturning holding force of the main cutter bar is reduced when the miniature circuit breaker is shifted to switch on, and thus, the reliable operation of a power grid can be seriously influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the extra-high voltage isolating switch main cutter bar protecting device which is simple in structure and solves the problem that the extra-high voltage three-column horizontal rotation turnover type isolating switch can turn over in advance. The invention also provides the isolating switch.
According to the embodiment of the first aspect of the invention, the extra-high voltage isolating switch main cutter bar protecting device comprises: the anti-rotation part is arranged at the front end of the auxiliary moving contact; the limiting mechanism is provided with a guide groove which allows the rotation preventing part to horizontally rotate along with the auxiliary moving contact, the stroke of the guide groove is consistent with the horizontal rotation stroke of the auxiliary moving contact, and the caliber of the guide groove is used for preventing the rotation preventing part from overturning; and the fixed support is arranged on one side of the main fixed contact of the isolating switch and used for fixing the limiting mechanism.
The extra-high voltage isolating switch main cutter bar protection device provided by the embodiment of the invention at least has the following technical effects: can realize the injecing to the movement track of supplementary moving contact through preventing commentaries on classics portion and stop gear, prevent that supplementary moving contact from taking place the upset before preventing that commentaries on classics portion passes through the guide slot completely, and then realize the injecing to the movement track of isolator's main pole, finally realize preventing the effect that main pole overturns in advance. The limiting mechanism can be flexibly mounted through the fixing support, and meanwhile, the fixing support and the limiting mechanism can be flexibly detached.
According to some embodiments of the invention, the rotation preventing part is of a plate-like structure.
According to some embodiments of the invention, the limiting mechanism is a channel steel or a U-shaped plate.
According to some embodiments of the invention, the upper and lower sides of the limiting mechanism are respectively provided with an upper clamping plate and a lower clamping plate, and the upper clamping plate and the lower clamping plate are used for adjusting the width of the guide groove.
According to some embodiments of the invention, the fixing bracket comprises: the mounting column is fixed on one side of the main static contact; one end of the connecting component is fixed on the mounting column; and the fixing part is connected with the other end of the connecting part and is used for fixing the limiting mechanism.
According to some embodiments of the invention, the connecting part comprises a clamping part, a connecting column and a connecting seat which are connected in sequence; the clamping part is connected with the mounting column; the connecting seat is used for installing the fixing part.
According to some embodiments of the invention, an adjustment bolt is provided on the mounting post; the adjusting bolt is used for adjusting the length of the mounting column.
According to some embodiments of the invention, the securing component employs mechanical jaws; the mechanical clamping jaw is fixed on the connecting part.
According to a second aspect of the invention, an isolation switch comprises: the extra-high voltage isolating switch main cutter bar protecting device is described above; the rotary insulator, the turnover transmission box and the main cutter rod are connected in sequence; the rotary insulator is used for driving the main cutter bar to horizontally rotate through the turnover transmission box; the turnover transmission box is also used for enabling the main cutter bar to rotate around the axis of the main cutter bar; the active contacts are arranged at two ends of the main cutter rod; the auxiliary moving contact is arranged at the front end of the active contact; the main static contact is used for controlling the on-off of a main power supply loop together with the active contact; and the auxiliary static contact is used for controlling the on-off of the auxiliary loop together with the auxiliary moving contact.
The isolating switch provided by the embodiment of the invention at least has the following technical effects: the function of preventing the main cutter bar from overturning in advance can be realized by adding the extra-high voltage isolating switch main cutter bar protecting device. The main cutter bar can be turned around the axis by turning the transmission case. In addition, the rotary insulator can be connected into external power supply equipment more conveniently.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a front view of the isolator switch of the present invention (only one side of the main bar is shown);
FIG. 2 is an enlarged schematic view of a detail A of FIG. 1;
fig. 3-1 is a schematic view of the auxiliary moving contact of the present invention in a position limiting mechanism;
fig. 3-2 is a schematic view of the active contact of the present invention just moving to the main stationary contact;
fig. 3-3 are schematic diagrams of the closing end of the active contact and the main stationary contact according to the present invention.
Reference numerals:
a rotation prevention part 100,
A limiting mechanism 200, an upper clamping plate 210, a lower clamping plate 220,
Fixing bracket 300, mounting column 310, adjusting bolt 311, connecting part 320, clamping part 321, connecting column 322, connecting seat 323, fixing part 330,
A rotary insulator 400,
A turnover transmission case 500,
A driving contact 600,
An auxiliary moving contact 700,
A main static contact 800,
And an auxiliary stationary contact 900.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, if there are first, second, third, fourth, etc. described only for the purpose of distinguishing technical features, they are not to be interpreted as indicating or implying relative importance or implying number of indicated technical features or implying precedence of indicated technical features.
In the description of the present invention, unless otherwise explicitly defined, terms such as arrangement, connection and the like should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.
The extra-high voltage isolating switch main cutter bar protecting device according to the first aspect of the invention is described below with reference to fig. 1 to 3-3.
According to the embodiment of the first aspect of the invention, the extra-high voltage isolating switch main cutter bar protecting device comprises: rotation prevention part 100, limiting mechanism 200 and fixing support 300. The anti-rotation part 100 is arranged at the front end of the auxiliary moving contact 700; a limiting mechanism 200 having a guide groove for allowing the rotation prevention part 100 to horizontally rotate along with the auxiliary moving contact 700, wherein the stroke of the guide groove is identical to the horizontal rotation stroke of the auxiliary moving contact 700, and the caliber of the guide groove is used for preventing the rotation prevention part 100 from overturning; and the fixing bracket 300 is arranged on one side of the main fixed contact 800 of the isolating switch and used for fixing the limiting mechanism 200.
Referring to fig. 1 to 3-3, the limiting mechanism 200 has a guide groove therein, which allows the rotation preventing part 100 to pass through when the rotation preventing part 100 is not turned, and prevents the rotation preventing part 100 from passing through when the rotation preventing part 100 is turned. When the isolating switch starts to be switched on, the main blade rod drives the driving contact 600 and the auxiliary moving contact 700 to operate, and further drives the rotation preventing part 100 located at the front end of the auxiliary moving contact 700 to move along. When the rotation preventing part 100 runs to the limiting mechanism 200, the rotation preventing part 100 can pass through the guide groove, but the caliber width of the guide groove is limited, and the rotation preventing part 100 can only pass through the guide groove under the condition that the rotation preventing part 100 is not overturned, so that the rotation preventing part 100 can only overturn after the rotation preventing part 100 moves out of the limiting mechanism 200, the rotation of the auxiliary contact, the main contact and the main cutter bar is limited, and the purpose of preventing the rotation in advance is achieved.
According to the extra-high voltage isolating switch main cutter bar protecting device provided by the embodiment of the invention, the motion trail of the auxiliary moving contact 700 can be limited by the rotation preventing part 100 and the limiting mechanism 200, the auxiliary moving contact 700 is prevented from being overturned before the rotation preventing part 100 completely passes through the guide groove, the motion trail of the main cutter bar of the isolating switch is further limited, and the effect of preventing the main cutter bar from being overturned in advance is finally realized. The fixing bracket 300 can be used for flexibly mounting the limiting mechanism 200, and meanwhile, the fixing bracket 300 and the limiting mechanism 200 can be flexibly detached.
In some embodiments of the present invention, referring to fig. 2, the rotation preventing part 100 is a plate-shaped structure. The width of the guide groove can be made narrower by adopting the plate-shaped structure, and the possibility of the anti-rotation part 100 turning over when passing through the guide groove can be further reduced by combining the two plates because the plate-shaped structure is a slender structure.
In some embodiments of the present invention, referring to fig. 2, the spacing mechanism 200 employs channel steel or U-shaped plates for the spacing mechanism 200. The limitation of the rotation-preventing part 100 can be realized by adopting a channel steel or U-shaped plate structure. The gap between the upper side and the lower side of the channel steel or the U-shaped plate can be used as a guide groove. Theoretically, the higher the degree of the fit between the width of the guide groove and the thickness of the rotation preventing portion 100, the better. However, considering the problems of corrosion in actual installation and later use, the width of the guide groove is usually slightly wider than the thickness of the rotation preventing part 100, so that the rotation preventing part 100 can be ensured to pass through the guide groove smoothly, and the function of preventing the rotation preventing part 100 from turning over in advance can be achieved.
In some embodiments of the present invention, referring to fig. 2, an upper clamping plate 210 and a lower clamping plate 220 are respectively disposed on the upper side and the lower side of the limiting mechanism 200, and the upper clamping plate 210 and the lower clamping plate 220 are used for adjusting the caliber width of the guide groove. The upper and lower clamping plates 210 and 220 may be connected to the upper and lower sides of the limiting mechanism 200 by welding. The guide groove surrounded by the upper clamping plate 210 and the lower clamping plate 220 can be adjusted by adjusting the positions of the upper clamping plate 210 and the lower clamping plate 220 on the upper side and the lower side of the limiting mechanism 200. This allows the range of applications of the limit mechanism 200 to be larger, and more types of disconnectors can be used.
In some embodiments of the present invention, referring to fig. 2, the fixing bracket 300 includes: mounting post 310, connecting member 320, and securing member 330. The mounting post 310 is fixed on one side of the main static contact 800; a connecting member 320 having one end fixed to the mounting post 310; and a fixing member 330 connected to the other end of the connecting member 320, for fixing the spacing mechanism 200. The fixing member 330 may be disposed at a proper position by the cooperation of the mounting post 310 and the connecting member 320, and the spacing mechanism 200 may be fixed at a proper position by the fixing member 330.
In some embodiments of the present invention, referring to fig. 2, the coupling member 320 includes a clamping part 321, a coupling post 322, and a coupling seat 323, which are sequentially coupled; the clamping part 321 is connected with the mounting column 310; the coupling seat 323 is used to mount the fixing member 330. Generally, in order to ensure that the fastening part 321 is assembled with the mounting post 310, a circular through hole matching with the mounting post 310 is formed inside the fastening part 321, and an opening is formed at one side of the fastening part 321, so that the fastening part 321 can be tightly assembled with the mounting post 310. In addition, a bolt hole can be formed in one side of the opening of the clamping part 321, so that the clamping part 321 can be further locked by using a bolt conveniently in the follow-up process. Connecting section 323 mainly provides a mounting base for limiting mechanism 200, and usually a through hole is formed in connecting section 323, so that it is convenient to subsequently assemble limiting mechanism 200 and connecting section 323 using a bolt or other components. The connection post 322 is used to connect the fastening part 321 and the connection seat 323.
In some embodiments of the present invention, an adjusting bolt 311 is disposed on the mounting post 310; the adjustment bolt 311 is used to adjust the length of the mounting post 310. The adjustment bolt 311 is used to adjust the length of the mounting post 310. For different types of disconnectors, the installation environments of the main static contact 800 may be different, and even the installation positions of disconnectors of the same type may have a certain error, for example, when the disconnectors are installed on a grading ring, a certain error may exist in the distance between the grading rings on the two sides of the main static contact 800, and at the same time, an error may also exist in the installation column 310 itself. The problem of these small errors can be effectively solved by adjusting the bolt 311.
In some embodiments of the invention, the securing component 330 employs mechanical jaws; the mechanical jaws are fixed to the connecting member 320. The mechanical clamping jaws can be used to stabilize and secure the spacing mechanism 200 and the fixing part 330. In some embodiments, a screw may be coupled behind the fixing member 330, and the assembly between the fixing member 330 and the coupling member 320 may be facilitated by the screw.
According to a second aspect of the invention, an isolation switch comprises: the special high voltage isolating switch comprises a main cutter bar protecting device of the special high voltage isolating switch, a rotary insulator 400, a turnover transmission case 500, a main cutter bar, a driving contact 600, an auxiliary moving contact 700, a main static contact 800 and an auxiliary static contact 900. The extra-high voltage isolating switch main cutter bar protecting device is used for limiting the turnover of the main cutter bar; the rotary insulator 400 is used for driving the main cutter bar to horizontally rotate through the turnover transmission case 500; the turnover transmission case 500 is also used for enabling the main cutter bar to rotate around the axis of the main cutter bar; the active contacts 600 are arranged at two ends of the main cutter bar; the auxiliary moving contact 700 is disposed at the front end of the active contact 600; the main static contact 800 is used for controlling the on-off of a main power supply loop together with the active contact 600; the auxiliary stationary contact 900 is used to control the on/off of the auxiliary circuit together with the auxiliary moving contact 700.
Referring to fig. 1 to 3-3, the rotation of the rotary insulator 400 drives the turnover transmission case 500 to operate, thereby driving the main blade to rotate horizontally. The main cutter bar does not turn during the horizontal rotation due to the problem of the holding force of the turn gear box 500. In the switching-on process, the extra-high voltage isolating switch main cutter bar protection device does not overturn in advance. Therefore, the normal switching on of the active contact 600 and the main stationary contact 800 can be ensured.
According to the isolating switch provided by the embodiment of the invention, the function of preventing the main cutter bar from overturning in advance can be realized by adding the extra-high voltage isolating switch main cutter bar protecting device. The completion of the main cutter bar turning motion about the axis can be realized by turning the gear box 500. In addition, the external power supply device can be more conveniently connected through the rotary insulator 400.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the embodiments, and those skilled in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. The utility model provides an extra-high voltage isolator owner cutter arbor protection device which characterized in that includes:
the anti-rotation part (100) is arranged at the front end of the auxiliary moving contact (700);
the limiting mechanism (200) is provided with a guide groove which allows the rotation prevention part (100) to horizontally rotate along with the auxiliary moving contact (700), the stroke of the guide groove is consistent with the horizontal rotation stroke of the auxiliary moving contact (700), and the caliber of the guide groove is used for preventing the rotation prevention part (100) from overturning;
and the fixed support (300) is arranged on one side of the main fixed contact (800) of the isolating switch and used for fixing the limiting mechanism (200).
2. The extra-high voltage isolating switch main cutter bar protecting device according to claim 1, wherein the rotation preventing part (100) is of a plate-shaped structure.
3. The extra-high voltage isolating switch main cutter bar protecting device according to claim 1 or 2, wherein the limiting mechanism (200) is made of channel steel or a U-shaped plate.
4. The extra-high voltage isolating switch main cutter bar protecting device according to claim 1, wherein an upper clamping plate (210) and a lower clamping plate (220) are respectively arranged on the upper side and the lower side of the limiting mechanism (200), and the upper clamping plate (210) and the lower clamping plate (220) are used for adjusting the caliber width of the guide groove.
5. The main arbor protector for extra-high voltage isolation switch of claim 1, characterized in that the fixing bracket (300) comprises:
the mounting column (310) is fixed on one side of the main static contact (800);
a connecting member (320) having one end fixed to the mounting post (310);
and a fixing member (330) connected to the other end of the connecting member (320) and fixing the stopper mechanism (200).
6. The extra-high voltage isolating switch main cutter bar protecting device is characterized in that the connecting part (320) comprises a clamping part (321), a connecting column (322) and a connecting seat (323) which are connected in sequence; the clamping part (321) is connected with the mounting column (310); the connecting seat (323) is used for installing the fixing part (330).
7. The extra-high voltage isolating switch main cutter bar protecting device according to claim 5, characterized in that an adjusting bolt (311) is arranged on the mounting column (310); the adjusting bolt (311) is used for adjusting the length of the mounting column (310).
8. The extra-high voltage isolating switch main cutter bar protecting device according to claim 5, characterized in that the fixing part (330) adopts a mechanical clamping jaw; the mechanical clamping jaw is fixed on the connecting part (320).
9. A disconnector, comprising: the main cutter bar protecting device of the extra-high voltage isolating switch as claimed in any one of claims 1 to 8; and
the rotary insulator (400), the turnover transmission case (500) and the main cutter rod are connected in sequence; the rotary insulator (400) is used for driving the main cutter bar to horizontally rotate through the turnover transmission box (500); the overturning transmission box (500) is also used for enabling the main cutter bar to rotate around the axis of the main cutter bar;
the driving contacts (600) are arranged at two ends of the main cutter rod;
the auxiliary moving contact (700) is arranged at the front end of the active contact (600);
the main static contact (800) is used for controlling the on-off of a main power supply loop together with the active contact (600);
and the auxiliary static contact (900) is used for controlling the on-off of the auxiliary loop together with the auxiliary moving contact (700).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010134210.5A CN111403224A (en) | 2020-03-02 | 2020-03-02 | Extra-high voltage isolating switch main cutter bar protection device and isolating switch |
| PCT/CN2020/102842 WO2021174746A1 (en) | 2020-03-02 | 2020-07-17 | Main knife protection device for ultra-high voltage isolation switch, and isolation switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010134210.5A CN111403224A (en) | 2020-03-02 | 2020-03-02 | Extra-high voltage isolating switch main cutter bar protection device and isolating switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111403224A true CN111403224A (en) | 2020-07-10 |
Family
ID=71430403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010134210.5A Pending CN111403224A (en) | 2020-03-02 | 2020-03-02 | Extra-high voltage isolating switch main cutter bar protection device and isolating switch |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111403224A (en) |
| WO (1) | WO2021174746A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112216547A (en) * | 2020-10-27 | 2021-01-12 | 国网冀北电力有限公司检修分公司 | Prevent spacing resetting means and isolator that isolator overturned in advance |
| WO2021174746A1 (en) * | 2020-03-02 | 2021-09-10 | 湖南长高高压开关集团股份公司 | Main knife protection device for ultra-high voltage isolation switch, and isolation switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114068233B (en) * | 2021-11-02 | 2024-05-07 | 裕力电气集团有限公司 | Load switch convenient for replacing linkage mechanism |
| CN114221244B (en) * | 2021-11-22 | 2024-04-09 | 华能河南中原燃气发电有限公司 | 500kV isolator deicing system convenient to use |
| CN114284008B (en) * | 2021-12-06 | 2024-02-09 | 扬州市玉宇电器有限公司 | Double-layer compression ring for uniform high-voltage power transmission |
| CN114227544B (en) * | 2021-12-24 | 2023-02-21 | 连云港市永旺玻璃制品有限公司 | Anti-cracking cutting device and method for hollow glass processing production |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4112268A (en) * | 1976-12-01 | 1978-09-05 | H. K. Porter Company, Inc. | Double side air break disconnecting switch |
| CN201616373U (en) * | 2009-12-14 | 2010-10-27 | 山东泰开隔离开关有限公司 | Three-column horizontal tilting type outdoor three-phase high-voltage alternating-current isolating switch |
| US8916785B1 (en) * | 2012-10-13 | 2014-12-23 | Cleaveland/Price Inc. | Double break disconnect switch |
| CN209033808U (en) * | 2018-10-17 | 2019-06-28 | 无锡市前友工程咨询检测有限公司 | A kind of holding frame of perforation extraction instrument |
| CN209753656U (en) * | 2019-03-29 | 2019-12-10 | 中冶南方工程技术有限公司 | opening degree adjustable furling guide groove |
| CN111403224A (en) * | 2020-03-02 | 2020-07-10 | 湖南长高高压开关集团股份公司 | Extra-high voltage isolating switch main cutter bar protection device and isolating switch |
-
2020
- 2020-03-02 CN CN202010134210.5A patent/CN111403224A/en active Pending
- 2020-07-17 WO PCT/CN2020/102842 patent/WO2021174746A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021174746A1 (en) * | 2020-03-02 | 2021-09-10 | 湖南长高高压开关集团股份公司 | Main knife protection device for ultra-high voltage isolation switch, and isolation switch |
| CN112216547A (en) * | 2020-10-27 | 2021-01-12 | 国网冀北电力有限公司检修分公司 | Prevent spacing resetting means and isolator that isolator overturned in advance |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021174746A1 (en) | 2021-09-10 |
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