CN212695068U - Double-column rotary open type isolating switch wiring seat, conductive seat and isolating switch - Google Patents

Double-column rotary open type isolating switch wiring seat, conductive seat and isolating switch Download PDF

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Publication number
CN212695068U
CN212695068U CN202021297309.9U CN202021297309U CN212695068U CN 212695068 U CN212695068 U CN 212695068U CN 202021297309 U CN202021297309 U CN 202021297309U CN 212695068 U CN212695068 U CN 212695068U
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China
Prior art keywords
hole
conductive
isolating switch
connecting part
connecting portion
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CN202021297309.9U
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Chinese (zh)
Inventor
王林荃
马晓
吴上
彭壮
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Chang Hi Tech New Technology Co ltd
Hunan Changgao High Voltage Switchgear Group Co Ltd
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Hunan Changgao High Voltage Switchgear Group Co Ltd
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Abstract

The utility model provides a rotatory open-type isolator wire holder of twin columns, electrically conductive seat and isolator, the rotatory open-type isolator wire holder of twin columns includes: the first connecting part is internally provided with a cavity structure; the upper side of the first connecting part is provided with a first through hole, the lower side of the first connecting part is provided with a second through hole corresponding to the first through hole, and the first through hole and the second through hole are jointly used for connecting a conductive shaft of the isolating switch conductive seat; the right side of the first connecting part is used for connecting one end of a flexible conductive belt of the isolating switch conductive seat; the second connecting part is used for connecting the isolating switch conducting rod and the first connecting part; the first connecting part and the second connecting part are of an integrally formed structure. The embodiment of the utility model provides a through built-in cavity in first connecting portion, reduced the volume of wire holder, also be convenient for with electrically conductive seat in the connection of other parts. Through designing into integrated into one piece structure with first connecting portion and second connecting portion, simplified the process of wire holder processing, the structure of integration also better lets the electric current circulation simultaneously.

Description

Double-column rotary open type isolating switch wiring seat, conductive seat and isolating switch
Technical Field
The utility model belongs to the isolator field, concretely relates to rotatory open-type isolator connection terminal of twin columns, conductive seat and isolator.
Background
In an electric power system, the double-column rotary starting type isolating switch is widely applied to substations with voltages of 35KV and above. And the wire holder is a component which is difficult to avoid by most isolating switches. At present, most of wire holders of the double-column rotary opening type isolating switch adopt casting structures, the casting structures are complex in structure, and the casting cost is high; in addition, the problems of high weight, poor heat dissipation and the like are easily caused due to the complex structure, so that the working stability of the isolating switch is poor, the long-term stable operation of the power system is seriously hindered, and the cost of the power grid in operation and maintenance is increased.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a rotatory open-type isolator wire holder of twin columns, the simple structure of the rotatory open-type isolator wire holder of twin columns has solved the complicated, with high costs problem of wire holder structure. The utility model also provides a conductive seat and isolator.
According to the utility model discloses rotatory open-type isolator wire holder of twin columns of first aspect embodiment, include: a first connection portion and a second connection portion; the first connecting part is internally provided with a cavity structure; the upper side of the first connecting part is provided with a first through hole, the lower side of the first connecting part is provided with a second through hole corresponding to the first through hole, and the first through hole and the second through hole are jointly used for connecting a conductive shaft of a conductive seat of an isolating switch; the right side of the first connecting part is used for connecting one end of a flexible conductive belt of the isolating switch conductive seat; the second connecting part is used for connecting the isolating switch conducting rod and the first connecting part; the second connecting portion and the first connecting portion are of an integrally formed structure.
According to the utility model discloses rotatory open-type isolator wire holder of twin columns has following technological effect at least: through the built-in cavity in first connecting portion, can reduce the holistic volume of wire holder, also be convenient for simultaneously with the connection of other parts in the conductive seat. The first connecting part and the second connecting part are designed into an integrally formed structure, so that the processing process of the wire holder can be greatly simplified, and meanwhile, compared with a split structure, the integrally formed structure can better allow current to flow; in addition, the split structure is easy to corrode seriously due to long-time open air, so that the circulation of current is greatly influenced, the integrated structure can greatly reduce the influence of the problem, and the split structure can only corrode the surface of the connecting seat and cannot corrode the connecting part of a plurality of parts.
According to some embodiments of the invention, the lower side surface of the first connection portion is provided with a boss.
According to some embodiments of the invention, the first through hole and the second through hole are provided with an insulating layer on their surfaces.
According to some embodiments of the utility model, connect the through hole has been seted up on the right side of first connecting portion.
According to some embodiments of the utility model, keep away from on the second connecting portion the installation through-hole has been seted up to the one end of first connecting portion.
According to some embodiments of the invention, the material of the first connecting portion and the material of the second connecting portion all adopt aluminum alloy.
According to the utility model discloses electrically conductive seat of rotatory open-type isolator of twin columns of second aspect embodiment, include: the double-column rotary open type isolating switch wiring seat, the conductive shaft, the wiring terminal board and the flexible conductive belt; a conductive shaft disposed in the first and second through holes of the first connection portion; one end of the flexible conductive belt is connected with the inner surface of the right side of the first connecting part, and the other end of the flexible conductive belt is connected with the conductive shaft; and the terminal board is connected with one end of the conductive shaft, which is far away from the second through hole.
According to the utility model discloses electrically conductive seat of rotatory open-type isolator of twin columns has following technological effect at least: the double-column rotary open type isolating switch wiring seat is added, so that the whole structure of the conductive seat is simplified, and the cost of the whole conductive seat is reduced by phase change. The connection to the disconnector body can be achieved by connecting the terminal board and the conductive shaft. A stable current transfer may be provided by the flexible conductive strip.
According to some embodiments of the present invention, the flexible conductive strip is provided with through holes at both ends.
According to some embodiments of the present invention, the conductive shaft is provided with an insulating layer at a contact portion between the first through hole and the second through hole.
According to the utility model discloses isolator of third aspect embodiment, including the isolator body and as above-mentioned two post rotation open-type isolator conductive seat.
According to the utility model discloses isolator has following technological effect at least: the structure of the isolating switch can be simplified by adding the double-column rotary open type isolating switch conductive seat, and the cost of the whole isolating switch is reduced by phase change. And simultaneously, the stability of current transmission is improved.
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 schematic structural diagram of a wire holder according to an embodiment of the present invention
Fig. 2 is a schematic diagram of the operation of the wire holder according to the embodiment of the present invention.
Reference numerals:
a first connection portion 100, a first through hole 110, a second through hole 120, a boss 130, a connection through hole 140,
A second connecting portion 200, a mounting through-hole 210,
A conductive shaft 300,
A flexible conductive band 400,
A conductive rod 500,
A terminal board 600,
A porcelain insulator upper flange 700.
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 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 drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, if there are first, second, third, fourth, etc. described, it is only for the purpose of distinguishing technical features, and it is not understood that relative importance is indicated or implied or that the number of indicated technical features is implicitly indicated or that the precedence of the indicated technical features is implicitly indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.
A two-post rotary opening type disconnecting switch wire holder according to an embodiment of the first aspect of the present invention will be described below with reference to fig. 1 to 2.
According to the utility model discloses rotatory open-type isolator wire holder of twin columns of first aspect embodiment, include: a first connection portion 100 and a second connection portion 200. A first connection portion 100 having a hollow structure therein; the upper side of the first connecting part 100 is provided with a first through hole 110, the lower side is provided with a second through hole 120 corresponding to the first through hole 110, and the first through hole 110 and the second through hole 120 are used for connecting a conductive shaft 300 of the conductive seat of the isolating switch together; the right side of the first connecting part 100 is used for connecting one end of the flexible conductive strip 400 of the isolating switch conductive socket; a second connection part 200 for connecting the disconnection switch conductive bar 500 and the first connection part 100; the first connection portion 100 and the second connection portion 200 are integrally formed.
Referring to fig. 1 and 2, the first connection portion 100 has a cavity structure therein, and a flexible conductive tape 400 is connected to the inner surface of the right side of the first connection portion 100. The connection of the flexible conductive tape 400 to the inner surface of the right side of the first connection portion 100 may be performed by means of bolt fastening, welding, a clamping groove, or the like. Most settings of second connecting portion 200 are inside isolator conducting rod 500, can guarantee like this the utility model discloses the steadiness of connection terminal installation of embodiment. The upper side of the first connecting portion 100 is provided with a first through hole 110, the lower side of the first connecting portion 100 is provided with a second through hole 120 corresponding to the first through hole 110, the first through hole 110 and the second through hole 120 are used as shaft holes of the conductive shaft 300, and the conductive shaft 300 penetrates from the first through hole 110 and enters the second through hole 120, so that the conductive shaft 300 can be ensured to rotate in the first connecting portion 100. In some embodiments of the present invention, in order to ensure that the conductive shaft 300 does not directly contact with the first through hole 110 and the second through hole 120, an insulating sleeve may be added at a contact portion between the conductive shaft 300 and the first through hole 110 and the second through hole 120.
In addition, different current levels can be accommodated by selecting the size of the second connection portion 200 with different lengths and heights. The current level of the isolating switch is the current capacity of the conducting part of the isolating switch, the current capacity is in direct proportion to the current cross section of the right cavity of the wire holder and the conducting rod 500, and the larger the current cross section is, the larger the current capacity is, and the smaller the current capacity is. The through-flow section of the wire holder is equal to length and is multiplied by height, and when the height is fixed, the size of the through-flow section can be changed by changing the length of the right cavity of the wire holder during processing.
According to the utility model discloses rotatory open-type isolator wire holder of twin columns through built-in cavity in first connecting portion 100, can reduce the holistic volume of wire holder, also be convenient for simultaneously with electrically conductive being connected of other parts in the seat. The first connecting part 100 and the second connecting part 200 are designed into an integrally formed structure, so that the processing process of the wire holder can be greatly simplified, and meanwhile, the integrated structure can better lead current to flow; in addition, the split structure is easy to corrode seriously due to long-time open air, so that the circulation of current is greatly influenced, the integrated structure can greatly reduce the influence of the problem, and the split structure can only corrode the surface of the connecting seat and cannot corrode the connecting part of a plurality of parts.
In some embodiments of the present invention, the lower outer surface of the first connection portion 100 is provided with a boss 130. In actual engineering, the lower terminal surface of conducting shaft 300 can stretch out the downside of first connecting portion 100, and the length that conducting shaft 300 stretches out can be less than boss 130's height the utility model discloses an in some embodiments, the lower terminal surface of conducting shaft 300 also can select with first connecting portion 100's downside surface parallel and level, can guarantee like this the utility model discloses the connection terminal can with isolator porcelain bottle upper flange 700 surface connection, simultaneously, because there is the clearance between boss 130's the bottom surface of conducting shaft 300 and porcelain bottle upper flange 700 surface, when preventing that conducting shaft 300 from rotating with porcelain bottle upper flange 700 surface friction, guarantee conducting shaft 300's normal rotation.
In some embodiments of the present invention, the first through hole 110 and the second through hole 120 are surface-provided with an insulating layer. Since the conductive shaft 300 needs to be rotated and thus the connection is not necessarily stable, providing an insulating layer on the surfaces of the first through hole 110 and the second through hole 120 may prevent the conductive shaft 300 from being directly connected to the first connection portion 100 through the first through hole 110 and the second through hole 120. In addition, the setting of insulating layer also can let the rotation of conducting shaft 300 more level and smooth, in some embodiments of the utility model, the insulating layer can adopt insulating axle sleeve, can be convenient for the rotation of conducting shaft 300 like this more.
In some embodiments of the present invention, the right side of the first connecting portion 100 is opened with a connecting through hole 140. Referring to fig. 1 and 2, the right side of the first connection portion 100 is provided with the connection through hole 140, and the portion of the flexible conductive strip 400 connected to the right side of the first connection portion 100 is also provided with a corresponding through hole, so that the flexible conductive strip 400 can be quickly and stably connected to the right side of the first connection portion 100 by using a bolt fastener. In addition, the through holes are formed and the bolt fastening pieces are used for connection, so that the flexible conductive belt 400 is more convenient to disassemble, and can be replaced only after the bolts are disassembled when the flexible conductive belt 400 needs to be replaced, and the whole wire holder possibly needs to be replaced by adopting welding and other modes.
In some embodiments of the present invention, the second connecting portion 200 has a mounting through hole 210 at an end thereof away from the first connecting portion 100. The connection between the second connecting portion 200 and the conductive rod 500 is various, and the welded connection is firm, but is not convenient for later replacement, and may even damage the isolating switch body when the isolating switch body needs to be replaced. The second connection portion 200 is connected to the first connection portion 100 by a bolt fastener through a mounting through hole 210. Referring to fig. 1 and 2, an end of the second connection portion 200 connected to the conductive rod 500 is provided with a mounting through hole in a radial direction of the conductive rod 500, the conductive rod 500 is provided with a through hole corresponding to the mounting through hole, a groove capable of allowing the second connection portion 200 to be partially inserted is provided at a tip of the conductive rod 500, and after the second connection portion 200 is inserted into the groove, a bolt is used to pass through the through hole of the conductive rod 500 and the mounting through hole 210 of the second connection portion 200, and then fastening is performed. After fastening the plurality of through holes in the same manner, the second connection portion 200 is connected to the conductive rod 500. The mode is adopted for connection, on one hand, the wire holder is convenient to replace subsequently, and on the other hand, the connection stability can be improved.
In some embodiments of the present invention, the first connecting portion 100 is a cuboid structure, which is convenient for transportation and has higher stability when installed. The second connection portion 200 has a cylindrical structure, which is similar to the conductive rod 500, and facilitates the installation of the conductive rod 500 in a built-in manner, and the cylindrical structure has high stability and can bear a certain strength.
In some embodiments of the present invention, the second connecting portion 200 is also provided with a cavity inside. In practical engineering, part of the disconnecting switches do not need too high current-carrying capacity, and at this time, if the size of the second connection portion 200 is merely reduced, the strength of the second connection portion 200 may be greatly reduced, and at this time, if a cavity is provided in the second connection portion 200, a certain current-carrying capacity may be ensured, and at the same time, a greater strength may be provided.
In some embodiments of the present invention, the material of the first connecting portion 100 and the material of the second connecting portion 200 are both aluminum alloy. The aluminum alloy has the characteristics of light total amount and high strength, can greatly reduce the weight of the wire holder, has higher strength, and is also favorable for keeping the stability of the wire holder in subsequent operation. In addition, the aluminum alloy has high corrosion resistance, and can prevent the wire holder from being seriously corroded when the wire holder runs outdoors for a long time.
According to the utility model discloses electrically conductive seat of rotatory open-type isolator of twin columns of second aspect embodiment, include: the double-column rotary opening type disconnecting switch wire holder, the conductive shaft 300, the terminal board 600 and the flexible conductive belt 400. A conductive shaft 300 disposed in the first and second through holes 110 and 120 of the first connection portion 100; a terminal board 600 connected to an end of the conductive shaft 300 remote from the second through-hole 120; and a flexible conductive tape 400 having one end connected to the right inner surface of the first connection part 100 and the other end connected to the conductive shaft 300.
Referring to fig. 2, the connection of the flexible conductive tape 400 to the inner surface of the right side of the first connection portion 100 may be performed by means of bolt fastening, welding, a clamping groove, etc. Most of second connecting portion 200 sets up in isolator conducting rod 500, can guarantee like this the utility model discloses the steadiness of connection terminal installation of embodiment. The upper side of the first connecting portion 100 is provided with a first through hole 110, the lower side of the first connecting portion 100 is provided with a second through hole 120 corresponding to the first through hole 110, the first through hole 110 and the second through hole 120 are used as shaft holes of the conductive shaft 300, and the conductive shaft 300 penetrates from the first through hole 110 and enters the second through hole 120, so that the conductive shaft 300 can be ensured to rotate in the first connecting portion 100. The end of the shaft 300 remote from the second through-hole 120 is connected to a terminal block 600, which is finally used to connect an external wire clamp.
During the use, will the utility model discloses electrically conductive seat installs in isolator vase upper flange 700's upper surface, makes the downside surface of first connecting portion 100 be connected with vase upper flange 700 upper surface, and the axle center that makes electrically conductive axle 300 is the same with the rotatory axle center of isolator vase upper flange 700. Meanwhile, the terminal board 600 is connected to an external clamp. When the isolating switch works, the terminal board 600 and the conductive shaft 300 are fixed by the tension of an external wire clamp; in the disconnecting switch breaking and closing process, the utility model discloses the connection terminal rotates, simultaneously owing to adopt flexible conductive band 400 for the connection terminal can rotate relatively round conducting shaft 300, and the rotation of connection terminal drives conducting rod 500's rotation, and then prevents that disconnecting switch from breaking and closing the in-process, because terminal board 600 and conducting shaft 300 receive outside fastener pulling force and cause the conducting rod 500 "the condition of dying of holding back".
According to the utility model discloses rotatory open-type isolator of twin columns leads electrical seat can make the holistic structure of conductive seat obtain simplifying through increasing the rotatory open-type isolator connection terminal of foretell twin columns, also becomes the cost that reduces whole conductive seat mutually. The connection with the disconnection switch body can be achieved by connecting the terminal board 600 and the conductive shaft 300 together. Stable current transfer may be provided by the flexible conductive strip 400.
In some embodiments of the present invention, both ends of the flexible conductive strip 400 are provided with through holes. Referring to fig. 1 and 2, a through hole is formed at one end of the flexible conductive strip 400 connected to the wire holder, so that the connection with the wire holder can be facilitated. In practical engineering, in order to ensure the connection between the flexible conductive strip 400 and the wire holder, the right side of the first connection portion 100 is also provided with the connection through holes 140 corresponding to the through holes on the flexible conductive strip 400, so that the bolt fasteners can be used to realize the fast and stable connection between the flexible conductive strip 400 and the right side of the first connection portion 100 through the through holes. Referring to fig. 1 and 2, a through hole is formed at one end of the flexible conductive band 400 connected to the conductive shaft 300 to facilitate connection with the conductive shaft 300, and the connection with the conductive shaft 300 is also fastened by a bolt fastener. In addition, the through holes are formed and the bolt fastening pieces are used for connection, so that the flexible conductive belt 400 is more convenient to detach, the flexible conductive belt can be replaced only after the bolts are detached, and the whole conductive seat can be replaced by adopting welding and other modes.
In some embodiments of the present invention, the contact portion between the conductive shaft 300 and the first through hole 110 and the second through hole 120 is provided with an insulating layer. Providing an insulating layer may prevent the conductive shaft 300 from being connected to the first connection portion 100 through the first and second through holes 110 and 120 because the conductive shaft 300 needs to be rotated and thus the connection must be unstable. In addition, the setting of insulating layer also can let the rotation of conducting shaft 300 more level and smooth, in some embodiments of the utility model, the insulating layer can adopt insulating axle sleeve, can be convenient for the rotation of conducting shaft 300 like this more.
According to the utility model discloses the isolator of third aspect embodiment, including the electrically conductive seat of isolator body and foretell rotatory open-type isolator of twin columns.
Referring to fig. 1 and 2, the lower outer surface of the first connection portion 100 is mounted on the upper surface of the upper flange 700 of the porcelain bottle of the disconnector body, and the second connection portion 200 is mounted in the conductive rod 500 of the disconnector.
According to the utility model discloses isolator can make isolator's structure obtain simplifying through increasing foretell double-column rotation open-type isolator conductive seat, also the phase-change has reduced whole isolator's cost. And simultaneously, the stability of current transmission is improved.
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 present 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 above embodiments, and those skilled in the art can 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 (10)

1. The utility model provides a two post rotation open-type isolator wire holders which characterized in that includes:
a first connection part (100) having a cavity structure therein; a first through hole (110) is formed in the upper side of the first connecting part (100), a second through hole (120) corresponding to the first through hole (110) is formed in the lower side of the first connecting part, and the first through hole (110) and the second through hole (120) are jointly used for connecting a conductive shaft (300) of a conductive seat of an isolating switch; the right side of the first connecting part (100) is used for connecting one end of a flexible conductive strip (400) of the isolating switch conductive seat;
a second connection part (200) for connecting the disconnecting switch conductive rod (500) and the first connection part (100); the second connecting part (200) and the first connecting part (100) are of an integrally formed structure.
2. The connector holder of the dual column rotary on type disconnecting switch according to claim 1, wherein the lower outer surface of the first connecting portion (100) is provided with a boss (130).
3. The connector holder of claim 1, wherein the first and second through holes (110, 120) are provided with an insulating layer on the surface.
4. The connector holder of the dual-column rotary opening type disconnecting switch according to claim 1, wherein the right side of the first connecting portion (100) is provided with a connecting through hole (140).
5. The connector holder of claim 1, wherein the second connecting portion (200) has a mounting hole (210) at an end thereof remote from the first connecting portion (100).
6. The connector holder of claim 1, wherein the first connecting portion (100) and the second connecting portion (200) are made of aluminum alloy.
7. The utility model provides a two post rotation open-type isolator conductive seat which characterized in that includes: the connector holder of the double-column rotary opening type disconnecting switch as claimed in any one of claims 1 to 6; and
a conductive shaft (300) disposed in the first through hole (110) and the second through hole (120) of the first connection portion (100);
a flexible conductive tape (400) having one end connected to the right inner surface of the first connection part (100) and the other end connected to the conductive shaft (300);
and a terminal board (600) connected to one end of the conductive shaft (300) remote from the second through hole (120).
8. The dual-post rotary on-type disconnector conductive socket according to claim 7, wherein both ends of the flexible conductive strap (400) are provided with through holes.
9. The dual-column rotary on-type disconnector conductive socket according to claim 7, wherein an insulating layer is disposed at a contact portion of the conductive shaft (300) and the first and second through holes (110, 120).
10. A disconnector comprising a disconnector body and a double-post rotary on-disconnector contact block according to any one of claims 7 to 9.
CN202021297309.9U 2020-07-06 2020-07-06 Double-column rotary open type isolating switch wiring seat, conductive seat and isolating switch Active CN212695068U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021297309.9U CN212695068U (en) 2020-07-06 2020-07-06 Double-column rotary open type isolating switch wiring seat, conductive seat and isolating switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021297309.9U CN212695068U (en) 2020-07-06 2020-07-06 Double-column rotary open type isolating switch wiring seat, conductive seat and isolating switch

Publications (1)

Publication Number Publication Date
CN212695068U true CN212695068U (en) 2021-03-12

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ID=74896180

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Application Number Title Priority Date Filing Date
CN202021297309.9U Active CN212695068U (en) 2020-07-06 2020-07-06 Double-column rotary open type isolating switch wiring seat, conductive seat and isolating switch

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Address after: No. 393, Section 3, Jinxing North Road, Wangcheng Economic and Technological Development Zone, Changsha, Hunan 410219

Patentee after: Chang Hi-Tech New Technology Co.,Ltd.

Country or region after: China

Patentee after: HUNAN CHANGGAO HIGH VOLTAGE SWITCHGEAR Co.,Ltd.

Address before: 411400, No. 393, section 3, North Jinxing Road, Wangcheng economic and Technological Development Zone, Changsha City, Hunan Province

Patentee before: HUNAN CHANGGAO HIGH VOLTAGE SWITCHGEAR GROUP Co.,Ltd.

Country or region before: China

Patentee before: HUNAN CHANGGAO HIGH VOLTAGE SWITCHGEAR Co.,Ltd.

CP03 Change of name, title or address