CN114069459A - Solid insulation base and switch unit using same - Google Patents

Solid insulation base and switch unit using same Download PDF

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Publication number
CN114069459A
CN114069459A CN202111301093.8A CN202111301093A CN114069459A CN 114069459 A CN114069459 A CN 114069459A CN 202111301093 A CN202111301093 A CN 202111301093A CN 114069459 A CN114069459 A CN 114069459A
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CN
China
Prior art keywords
base
flat plate
solid
insulating
switch unit
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.)
Pending
Application number
CN202111301093.8A
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Chinese (zh)
Inventor
窦玮
钟子华
黄楷涛
武可
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhuhai XJ Electric Co Ltd
Original Assignee
Zhuhai XJ Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhuhai XJ Electric Co Ltd filed Critical Zhuhai XJ Electric Co Ltd
Priority to CN202111301093.8A priority Critical patent/CN114069459A/en
Publication of CN114069459A publication Critical patent/CN114069459A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/54—Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch
    • 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
    • H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
    • H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
    • 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
    • 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
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/50—Pedestal- or pad-mounted casings; Parts thereof or accessories therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/075—Earthing arrangements

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

The invention relates to a solid insulating base and a switch unit using the same, wherein the solid insulating base comprises a sleeve structure and a flat plate supporting structure, and the sleeve structure is arranged at the lower part of the flat plate supporting structure; the flat plate supporting structure comprises a base body, three grounding contacts and three insulating columns, wherein the three grounding contacts and the three insulating columns are arranged on the base body; the sleeve structure comprises A, B, C three-phase conductive rods and electric display induction nets respectively arranged around the A, B, C three-phase conductive rods; the A, B, C three-phase conducting rod extends from the bottom of the center of the flat plate supporting structure and bends and extends downwards, and is connected with the three insulating columns at the bottom of the flat plate supporting structure respectively. According to the invention, through the structural design of the solid insulating base, the size of the solid insulating base is reduced, the creepage distance is more abundant, and the reliability is higher; and can guarantee to realize the design of less cabinet depth under enough cable chamber degree of depth space to compatible maximum thickness's current transformer.

Description

Solid insulation base and switch unit using same
Technical Field
The invention relates to the technical field of high-voltage electrical equipment, in particular to a solid insulating base and a switch unit using the same.
Background
The solid insulation base is a core component of a new generation of solid insulation ring main unit. The solid insulation base in the prior art is of a flat plate structure integrally, a three-phase wire inlet and outlet conductive rod and a grounding contact are fixedly sealed, and a sleeve is arranged in a front manner and is matched with a three-station insulation box for use. The solid insulating base of the prior art has the following disadvantages:
(1) the structure is a flat plate structure generally, the creepage distance threshold amount is small, and the structure volume is large;
(2) the sleeve in the solid insulation base is usually arranged in front, so that the space of a cable chamber is penetrated, the depth of the cabinet is generally larger, and the miniaturization of the product is not easy to realize;
(3) the insulator has a complex structure, the local material has poor uniformity, casting defects are easy to generate, or the bonding force with an insert is poor due to inconsistent shrinkage, and local discharge is easy to cause;
(4) the sleeve has short length, and the current transformer with larger thickness and size requirements such as small transformation ratio, phase zero sequence composite type and the like has poorer compatibility.
Disclosure of Invention
In view of the above-mentioned circumstances of the prior art, an object of the present invention is to provide a solid insulating base and a switch unit using the same, which are reduced in size, have a more sufficient creepage distance, and have higher reliability by structural design of the solid insulating base; and can guarantee to realize the design of less cabinet depth under enough cable chamber degree of depth space to compatible maximum thickness's current transformer.
To achieve the above object, according to one aspect of the present invention, there is provided a solid insulation base comprising a sleeve structure and a flat plate support structure, wherein the sleeve structure is disposed at a lower portion of the flat plate support structure;
the flat plate supporting structure comprises a base body, three grounding contacts and three insulating columns, wherein the three grounding contacts and the three insulating columns are arranged on the base body;
the sleeve structure comprises A, B, C three-phase conductive rods and electric display induction nets respectively arranged around the A, B, C three-phase conductive rods;
the A, B, C three-phase conducting rod extends from the bottom of the center of the flat plate supporting structure and bends and extends downwards, and is connected with the three insulating columns at the bottom of the flat plate supporting structure respectively.
Furthermore, the sleeve structure is connected with the front joint of the cable and the incoming and outgoing line loop.
Furthermore, the A, B, C three-phase current conducting rod is a bent structure which is bent for multiple times.
Furthermore, the three insulating columns are of columnar structures and are arranged on the base body in parallel;
the periphery of the bottom of each insulating column is sunken towards the inside of the base body to form a square display cavity structure.
Furthermore, the cylindrical structure of each insulating column forms a shed-type structure along the circumferential direction.
Further, the three ground contacts correspond to the three insulating columns respectively.
According to another aspect of the present invention, there is provided a switch unit having a solid insulating base, comprising a solid insulating base and a switch unit; the switch unit is arranged on the solid insulating base; wherein the content of the first and second substances,
the switch unit comprises a three-station disconnecting link, an insulating box and a pole;
the solid insulation base and the insulation box are assembled through flat plate sealing, and the switch unit is installed on the solid insulation base through the three-station disconnecting link.
Furthermore, each phase of the three-position disconnecting link is electrically connected with the A, B, C three-phase conductive rod of the solid insulating base through a detachable contact seat.
Furthermore, the three-station disconnecting link rotates for a preset angle under the support of the solid insulation base so as to realize the separation and combination of the isolating switch and the grounding switch in the switch unit.
In summary, the present invention provides a solid insulation base and a switch unit using the same, wherein the solid insulation base includes a sleeve structure and a flat plate supporting structure, the sleeve structure is disposed at a lower portion of the flat plate supporting structure; the flat plate supporting structure comprises a base body, three grounding contacts and three insulating columns, wherein the three grounding contacts and the three insulating columns are arranged on the base body; the sleeve structure comprises A, B, C three-phase conductive rods and electric display induction nets respectively arranged around the A, B, C three-phase conductive rods; the A, B, C three-phase conducting rod extends from the bottom of the center of the flat plate supporting structure and bends and extends downwards, and is connected with the three insulating columns at the bottom of the flat plate supporting structure respectively. According to the technical scheme provided by the invention, the solid insulating base is structurally designed, so that the size of the solid insulating base is reduced, the creepage distance is more abundant, and the reliability is higher; and can guarantee to realize the design of less cabinet depth under enough cable chamber degree of depth space to compatible maximum thickness's current transformer. The invention has the following beneficial technical effects:
(1) the method is applied to a miniaturized solid cabinet, and the width of the cabinet can reach 325 mm.
(2) Through arranging the sleeve pipe between two parties, the leading scheme of contrast prior art universal adoption, the cabinet deep space saves 100 ~ 150mm, is favorable to whole cabinet miniaturization.
(3) The adoption is alternate heavy chamber structure, and the insulating support post is provided with the full skirt, and the creep distance threshold volume is more sufficient, and insulating properties is more reliable.
(4) Through the integrative pouring of three-phase business turn over line conducting rod trigeminy, the modularization degree is higher, more is applicable to intelligent manufacturing.
(5) By adopting a long sleeve structure, the phase current transformer and the phase and zero sequence composite current transformer with the thickness of 65-120 mm can be compatible, and the application range is wider.
(6) According to the solid insulation base, only the incoming and outgoing line conductors are sealed, and the isolation contacts are independently installed, so that bad electric contact of the disconnecting link caused by displacement or skew of the contacts is effectively avoided.
Drawings
Fig. 1 is a schematic view of the overall structure of a solid insulation base according to an embodiment of the present invention 1;
FIG. 2 is a schematic view of the overall structure of a solid insulating base according to an embodiment of the present invention 2;
fig. 3 is a schematic diagram of the overall structure of the switch unit according to the embodiment of the present invention.
Description of reference numerals: 1-a base body, 2-a phase conducting rod, 3-B phase conducting rod, 4-C phase conducting rod, 5-a grounding contact, 6-an electric display induction net, 7-a sinking cavity, 8-an insulating column, 9-a shed and 10-an electric induction ring interface; 11-a solid insulating base; 12-a three-station knife switch; 13-an insulating box; 14-pole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. According to an embodiment of the invention, a solid insulation base is provided, and the solid insulation base is a core insulation part of a new generation of solid insulation ring main unit and is used for fixing and sealing the incoming and outgoing line conductive piece and the grounding contact and supporting the three-station isolation/grounding disconnecting link. Fig. 1 and 2 are schematic diagrams showing the overall structure of a solid insulation base according to an embodiment of the present invention from different angles, and the solid insulation base includes a sleeve structure and a flat plate support structure, wherein the sleeve structure is arranged at the lower part of the flat plate support structure. The solid insulating base can be formed by injection molding through an epoxy resin APG process, the lower part of the solid insulating base is of a sleeve structure, and the upper part of the solid insulating base is of a flat plate supporting structure. The three-phase conductive piece is poured in a triple mode, and the outer surface of the three-phase conductive piece is coated with a zinc layer or semi-conductive graphite for grounding shielding. The flat plate supporting structure comprises a base body 1, three grounding contacts 5 and three insulating columns 8, wherein the three grounding contacts 5 and the three insulating columns 8 are arranged on the base body 1; the bushing structure comprises an A-phase conducting rod 3, a B-phase conducting rod 4, a C-phase conducting rod 5 and an electric display induction net 6 which is respectively arranged around the A-phase conducting rod 3, the B-phase conducting rod 4 and the C-phase conducting rod 5; the A-phase conducting rod 3, the B-phase conducting rod 4 and the C-phase conducting rod 5 extend from the bottom of the center of the flat plate supporting structure, bend downwards and extend, and are respectively connected with the three insulating columns 8 at the bottom of the flat plate supporting structure. The sleeve structure is used for connecting a front joint of a cable and an incoming and outgoing line loop, and the sleeve structure is used for opening and closing the incoming and outgoing lines and is sometimes called an incoming and outgoing line sleeve for distinguishing other sleeve structures. In engineering applications, cables are plugged into the sleeves through the cable front interface to transmit electrical current. By adopting the centered arrangement of the sleeves, the design of smaller cabinet depth can be realized under enough cable chamber depth space, and the current transformer with the maximum thickness of 120mm can be compatible. The A-phase conducting rod 3, the B-phase conducting rod 4 and the C-phase conducting rod 5 are all of bent structures, and the bent structures are special-shaped bent structures which are bent for multiple times. As shown in fig. 1, three insulating columns 8 are in a columnar structure and are arranged in parallel on the base body; the periphery of the bottom of each insulating column 8 is sunken towards the inside of the base body 1 to form a square display cavity structure 7. The solid insulating base provided by the embodiment of the invention adopts a miniaturized sinking cavity structure design, the size is reduced to the utmost extent in the industry, the creepage distance is more abundant, and the reliability is higher. The cylindrical structure of each insulating column 8 forms a shed-type structure 9 along the circumferential direction. The three ground contacts 5 correspond to the three insulating columns 8 respectively. As shown in fig. 2, a live induction loop interface 10 is provided on the electric induction network 6. The solid insulation base of the embodiment of the invention realizes the miniaturization of the structure size through the design, and can realize the maximum outer contour: 315mm wide, 490mm long, and the bushing axis is 155mm from the top surface of the base. The three-phase conducting rod is formed by bending and pouring the three-phase conducting rod and the three-phase conducting rod is integrally formed by three-phase conducting rod, and the distance between every two adjacent three-phase conducting rod is 107mm in the width direction and 150mm in the depth direction. The lower bent sleeve is arranged in the middle of the flat plate supporting structure and is level with the B-phase insulating column left and right. The bottom of the three-phase insulating column is provided with a rectangular sinking cavity structure with the depth of 53 mm; the insulating support column is provided with a lateral umbrella skirt; the grounding contact is of a three-phase integrated structure and is fixedly sealed in the product; the outer surface of the pole insulator is coated with a zinc layer or semi-conductive graphite and is reliably grounded.
According to another embodiment of the present invention, there is provided a switch unit having a solid insulating base, and an overall structural schematic diagram of the switch unit is shown in fig. 3, the switch unit includes a solid insulating base 11 and a switch unit; the switch unit is arranged on the solid insulation base. The switch unit comprises a three-station knife switch 12, an insulating box 13 and a pole 14; the solid insulating base 11 and the insulating box 13 are assembled through flat plate sealing and fastened through screws on the periphery. The switch unit is installed on the solid insulation base 11 through the three-position disconnecting link 12. Each phase of the three-position disconnecting link 12 is electrically connected with the A, B, C three-phase conductive rod of the solid insulating base 11 through a detachable contact seat. The three-position disconnecting link rotates by a preset angle under the support of the solid insulating base to realize the separation and combination of the isolating switch and the grounding switch in the switch unit, and the preset angle is +/-60 degrees for example.
In summary, the present invention relates to a solid insulation base and a switch unit using the same, wherein the solid insulation base includes a sleeve structure and a flat plate supporting structure, the sleeve structure is disposed at a lower portion of the flat plate supporting structure; the flat plate supporting structure comprises a base body, three grounding contacts and three insulating columns, wherein the three grounding contacts and the three insulating columns are arranged on the base body; the sleeve structure comprises A, B, C three-phase conductive rods and electric display induction nets respectively arranged around the A, B, C three-phase conductive rods; the A, B, C three-phase conducting rod extends from the bottom of the center of the flat plate supporting structure and bends and extends downwards, and is connected with the three insulating columns at the bottom of the flat plate supporting structure respectively. According to the technical scheme provided by the invention, the solid insulating base is structurally designed, so that the size of the solid insulating base is reduced, the creepage distance is more abundant, and the reliability is higher; and can guarantee to realize the design of less cabinet depth under enough cable chamber degree of depth space to compatible maximum thickness's current transformer.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (9)

1. A solid insulation base is characterized by comprising a sleeve structure and a flat plate supporting structure, wherein the sleeve structure is arranged at the lower part of the flat plate supporting structure;
the flat plate supporting structure comprises a base body, three grounding contacts and three insulating columns, wherein the three grounding contacts and the three insulating columns are arranged on the base body;
the sleeve structure comprises A, B, C three-phase conductive rods and electric display induction nets respectively arranged around the A, B, C three-phase conductive rods;
the A, B, C three-phase conducting rod extends from the bottom of the center of the flat plate supporting structure and bends and extends downwards, and is connected with the three insulating columns at the bottom of the flat plate supporting structure respectively.
2. The solid insulation base of claim 1, wherein the bushing structure connects a cable front connector and an access loop.
3. The solid insulation base of claim 2, wherein the A, B, C three-phase conducting bars are each a multi-bent structure.
4. The solid insulation base of claim 3, wherein the three insulation posts are columnar structures arranged side by side on the base body;
the periphery of the bottom of each insulating column is sunken towards the inside of the base body to form a square display cavity structure.
5. The solid insulation base of claim 4, wherein the cylindrical structure of each insulation column circumferentially forms a shed-type structure.
6. The solid insulation base of claim 5, wherein the three ground contacts correspond to the three insulation posts, respectively.
7. A switch unit with a solid insulating base is characterized by comprising the solid insulating base and the switch unit; the switch unit is arranged on the solid insulating base; wherein the content of the first and second substances,
the switch unit comprises a three-station disconnecting link, an insulating box and a pole;
the solid insulation base and the insulation box are assembled through flat plate sealing, and the switch unit is installed on the solid insulation base through the three-station disconnecting link.
8. The switch unit of claim 7, wherein each phase of said three-position switches is electrically connected to the A, B, C three-phase conductive bars of said solid insulating base by a removable contact block.
9. The switch unit of claim 8, wherein the three-position disconnecting link rotates for a preset angle under the support of the solid insulating base to realize the switching on and off of the disconnecting switch and the grounding switch in the switch unit.
CN202111301093.8A 2021-11-04 2021-11-04 Solid insulation base and switch unit using same Pending CN114069459A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111301093.8A CN114069459A (en) 2021-11-04 2021-11-04 Solid insulation base and switch unit using same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111301093.8A CN114069459A (en) 2021-11-04 2021-11-04 Solid insulation base and switch unit using same

Publications (1)

Publication Number Publication Date
CN114069459A true CN114069459A (en) 2022-02-18

Family

ID=80273878

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111301093.8A Pending CN114069459A (en) 2021-11-04 2021-11-04 Solid insulation base and switch unit using same

Country Status (1)

Country Link
CN (1) CN114069459A (en)

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