CN213243116U

CN213243116U - Shielding cover and power transformation framework

Info

Publication number: CN213243116U
Application number: CN202021576537.XU
Authority: CN
Inventors: 庄奥运; 黄从鹏
Original assignee: Jiangsu Shenma Electric Power Co Ltd
Current assignee: Jiangsu Shenma Electric Power Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-05-18
Anticipated expiration: 2030-07-31

Abstract

The utility model discloses a shield cover, this shield cover include first main part and second main part, and first main part and second main part are the casing and set up relatively and form the shielding chamber, and the lower extreme in shielding chamber link up, and the second main part sets up the mounting hole in the one side relative with first main part, and the inner wall of first main part and second main part sets up the installation component respectively and is used for connecting other parts. The utility model also discloses a transformer framework, including shield cover, crossbeam and the supporting component of setting at the crossbeam both ends, the crossbeam passes through end flange with the supporting component and is connected, and the shield cover is located the end flange periphery and is made the end flange be located the shielding intracavity, and the end flange that directly articulates the wire on setting up of shield cover makes the transformer framework can not produce unusual corona discharge, reaches the effect of voltage-sharing to under the condition that shortens the whole length of transformer framework, keep good electrical property.

Description

Shielding cover and power transformation framework

Technical Field

The application relates to the technical field of power transmission, in particular to a shielding case and a power transformation framework.

Background

A power transformation framework is a structure for mounting an overhead conductor and bearing tension in an outdoor distribution device of a transformer substation, and generally includes a plurality of supporting members and insulating cross beams erected between the supporting members.

The inventor of the application finds that in the existing power transformation framework, usually, a flange at the end part cannot be directly provided with a hanging point of a lead, and the arrangement of the hanging line can cause corona discharge at the end part, so that potential safety hazards exist; meanwhile, only the wire is hung in the middle of the insulating beam, so that the length of the insulating beam can be increased, and the cost and the occupied area are increased.

SUMMERY OF THE UTILITY MODEL

To the deficiency of the prior art, one of the objects of the present invention is to provide a shielding cover, which is split, simple in structure, easy to install, and capable of preventing abnormal corona discharge from occurring in the cover of the irregular charged part.

In order to realize the purpose of the utility model, the utility model adopts the following technical means: the utility model provides a shield cover, includes first main part and second main part, and first main part and second main part are the casing and set up relatively and form the shielding chamber, and the lower extreme in shielding chamber link up, and the second main part sets up the mounting hole in one side relative with first main part, and the inner wall of first main part and second main part sets up the installation component respectively and is used for connecting other parts. The shielding cover is divided into the first main body and the second main body which are arranged in a split manner, so that the structure of the shielding cover is simplified, the processing and the forming are convenient, the production cost is reduced, the installation is convenient, and the irregularly-shaped charged part covered in the shielding cover can not generate corona discharge; due to the arrangement of the mounting hole, the shielding cover can be covered on a certain part of a large-sized component, and the application is wider.

Preferably, first main part includes preceding face, the back face of relative setting, the semicircle face of face and back face before connecting, and the edge of first main part sets up the turn-up. The structure of the first main body is smooth, edges and corners are reduced, and abnormal discharge of the tip can be avoided.

Preferably, the second body comprises a first sub-body and a second sub-body, and the first sub-body and the second sub-body are structurally symmetrical. The second main body is arranged in a split mode, so that components of the quilt cover arranged in the shielding cavity can be conveniently installed through the installation holes, and the operation and maintenance are convenient to install.

Preferably, the first split body comprises two plate surfaces which are perpendicular to each other, and the edge of the first split body is provided with a curled edge. The edges of the first split body and the second split body are provided with the curled edges, so that the electrical performance of the shielding cover can be guaranteed, and corona discharge does not occur.

Preferably, the first and second sub-bodies are provided with semicircular notches on the sides close to each other to form mounting holes. The two semicircular notches are combined into a circular mounting hole which can be just matched with the shape of the flange cylinder.

Preferably, the shielding case is made of metal. The conductive metal can reflect, absorb and counteract electromagnetic waves, so that the electromagnetic wave radiation is reduced. When the frequency of the interference electromagnetic field is higher, the eddy current generated in the metal material with low resistivity is utilized to form the counteraction effect on the electromagnetic wave, thereby achieving the shielding effect. When the frequency of the interference electromagnetic wave is lower, a material with high magnetic permeability is adopted, so that the magnetic force lines are limited in the shielding case, and the magnetic force lines are prevented from being diffused to the space outside the shielding case. In some cases, if a good shielding effect is required for both high-frequency and low-frequency electromagnetic fields, different metal materials may be used to form the multi-layer shield. At the same time, the whole surface of the shielding case must be conductive and continuous, and a conductor which can not directly penetrate through the shielding case cannot exist, so that good shielding effect can be achieved.

Preferably, the mounting components are a plurality of mounting plates, one end of each mounting plate is fixedly connected with the inner wall of the shielding case, and the other end of each mounting plate is provided with a through hole for connection. The mounting plate is integrally fixed with the inner wall of the shielding cover and is in bolt connection with the part arranged in the shielding cover through the through hole, so that the mounting and the dismounting are convenient.

To prior art not enough, the utility model discloses a second of the purpose provides a transformer framework, and this transformer framework's whole length of insulating crossbeam is short, can reduce manufacturing cost to reduce area, can also guarantee transformer framework's electrical property simultaneously.

In order to realize the purpose of the utility model, the utility model adopts the following technical means: the utility model provides a power transformation framework, includes the crossbeam and sets up the supporting component at the crossbeam both ends, and the crossbeam passes through tip flange joint, its characterized in that with supporting component: the power transformation framework further comprises a shielding cover, the shielding cover comprises a first main body and a second main body, the first main body and the second main body are shells and are oppositely arranged to form a shielding cavity, one side, opposite to the first main body, of the second main body is provided with a mounting hole, the inner walls of the first main body and the second main body are respectively provided with a mounting part used for being connected with an end flange, the shielding cover is arranged on the periphery of the end flange to enable the end flange to be located in the shielding cavity, and the end flange is connected with the cross beam through the mounting hole. Due to the arrangement of the shielding cover, abnormal corona discharge can not be generated on the end flange of the wiring power transformation framework, the voltage-sharing effect is achieved, and therefore good electrical performance is kept under the condition that the overall length of the power transformation framework is shortened.

Preferably, the end flange has a flange cylinder, and the flange cylinder extends to the outer side of the shielding cover through the mounting hole to be connected with the cross beam. The end flange is provided with a flange cylinder matched with the mounting hole of the shielding cover, so that the mounting is convenient.

Preferably, the mounting member is fixedly attached to an upper surface of the end flange such that the end flange can be easily coupled to the mounting member of the shield.

Drawings

Fig. 1 is a schematic perspective view of a shielding case 100 according to a first embodiment of the present invention;

fig. 2 is a perspective view of the first body 110 according to the first embodiment of the present invention;

fig. 3 is a schematic perspective view of the second body 120 according to the first embodiment of the present invention;

fig. 4 is a schematic perspective view of the first sub-body 121 according to the first embodiment of the present invention;

fig. 5 is a partial schematic view of a power transformation framework 1000 according to a second embodiment of the present invention;

fig. 6 is an overall schematic view of a power transformation framework 1000 according to a second embodiment of the present invention.

Detailed Description

As required, detailed embodiments of the present invention will be disclosed herein. However, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed manner, including employing various features disclosed herein in connection with which such features may not be explicitly disclosed.

The first embodiment is as follows:

as shown in fig. 1 to 4, the present embodiment provides a shielding case 100, which includes a first main body 110 and a second main body 120, where the first main body 110 and the second main body 120 are both shells and are oppositely disposed to form a shielding cavity 130, a lower end of the shielding cavity 130 penetrates through the shielding cavity, a mounting hole 123 is disposed on one side of the second main body 120 opposite to the first main body 110, and mounting members are disposed on inner walls of the first main body 110 and the second main body 120 respectively for connecting other members. The first main body 110 and the second main body 120 which are divided into the shielding case 100 are arranged in a split manner, so that the structure of the shielding case 100 is simplified, the processing and the forming are convenient, the production cost is reduced, the installation is convenient, and the charged parts which are covered in the shielding case and have irregular shapes can not generate corona discharge; the installation hole 123 allows the shielding cover 100 to be conveniently sleeved on a large component, so that the application of the shielding cover is wider.

In the present embodiment, the upper end of the shielding chamber 130 penetrates. The electric performance can be ensured under the condition of saving materials. In other embodiments, the upper end of the shielding cavity can be provided with a plane shielding structure, and the electrical performance of the covered electrified component can be still ensured.

In this embodiment, the first body 110 includes a front plate 111, a rear plate 112, and a semi-circular surface 113 connecting the front plate 111 and the rear plate 112, which are oppositely disposed, and a hem is disposed at an edge of the first body 110. The structure of the first body 110 is smooth, and the arrangement of the semicircular surface 113 and the curled edge can reduce edges and corners of the whole structure, avoid abnormal discharge of the tip, and ensure that the charged component has good electrical performance.

In this embodiment, the front plate 111, the rear plate 112, and the semicircular surface 113 connecting the front plate 111 and the rear plate 112 are smoothly transitioned, and there is no sharp corner. The edge of the first body 110 includes edges, all of which are configured to be curled.

In other embodiments, the semicircular surface can be replaced by a plane or an arc surface as long as the connection between the semicircular surface and the front plate surface and the connection between the semicircular surface and the rear plate surface are smooth.

In the present embodiment, the second body 120 includes a first segment 121 and a second segment 122, and the first segment 121 and the second segment 122 are structurally symmetrical. The second body 120 is separated from the housing, so that the components covered in the shielding cavity 130 can be conveniently mounted through the mounting holes 123, and the mounting, operation and maintenance are convenient.

In other embodiments, the first and second sub-bodies may be asymmetric in structure, and the shapes and sizes of the first and second sub-bodies are designed according to the actual shape of the charged member covered.

In this embodiment, the first sub-body 121 includes two perpendicular plate surfaces, a first plate surface 1211 and a second plate surface 1212, and a hem is disposed at an edge of the first sub-body 121. The edges of the first and

second sub-bodies

121 and 122 are curled, so that the electrical performance of the shield can 100 can be guaranteed and corona discharge does not occur.

In other embodiments, the first and second sub-bodies may be circular arc surfaces with a central angle of 90 °, or any other flat or curved surfaces with smooth surface transition, as long as there is enough space to cover the charged member.

In the present embodiment, the first and

second segments

121 and 122 are provided with semicircular notches 1213 on their sides adjacent to each other to form the mounting hole 123. The combination of the two semicircular notches 1213 into the circular mounting hole 123 can exactly match the shape of the flange barrel.

In other embodiments, the specific structure of the mounting hole may be designed according to the shape of the component passing through the mounting hole, and is not limited herein.

In the present embodiment, the shielding can 100 is made of metal. When the frequency of the interference electromagnetic field is higher, the eddy current generated in the metal material with low resistivity is utilized to form the counteraction effect on the electromagnetic wave, thereby achieving the shielding effect. When the frequency of the interfering electromagnetic wave is low, a material with high magnetic permeability is adopted, so that the magnetic lines of force are limited in the shielding case 100, and are prevented from being diffused to the space outside the shielding case 100. In other embodiments, different metal materials may be used to form the multi-layered shield if good shielding against both high and low frequency electromagnetic fields is desired. At the same time, the whole surface of the shielding case must be conductive and continuous, and a conductor which can not directly penetrate through the shielding case cannot exist, so that good shielding effect can be achieved.

In the present embodiment, the material of the shielding can 100 is aluminum. The aluminum material has light weight and low price, and can meet the shielding requirement. In other embodiments, metal materials such as iron, copper, nickel, etc. may be selected to meet the shielding requirements.

In the embodiment, the mounting member 140 includes a plurality of mounting plates 141, one end of each mounting plate 141 is fixedly connected to the inner wall of the shielding case 100, and the other end of each mounting plate 141 is provided with a through hole 1411 for connection. The mounting plate 141 is integrally fixed to the inner wall of the shield case 100, and is bolted to the components housed therein through the through holes 1411, thereby facilitating mounting and dismounting.

In this embodiment, four mounting plates 141 are provided on the inner wall of the first body 110, two mounting plates 141 are provided on the inner walls of the first and

second components

121 and 122 of the second body 120, respectively, and the mounting plates 141 are plate-shaped and are fixedly connected to the charged member housed in the shield case 100.

In other embodiments, the structure of the mounting member may be designed according to the shape characteristics of the live part covered on the shield case, and is not limited to the shape of the mounting plate.

The shield case 100 of the present embodiment is provided separately, and is easy to install, and the shield case is provided around the charged member to prevent abnormal corona discharge, so that the covered charged member has good electrical performance.

Example two:

as shown in fig. 5 to 6, in combination with fig. 1 to 4, the present embodiment further provides a power transformation framework 1000, which includes a cross beam 1100 and support assemblies 1200 disposed at two ends of the cross beam 1100, the cross beam 1100 is connected to the support assemblies 1200 through end flanges 1300, and a wire hanging plate is connected between the end flanges 1300 and the cross beam 1100 for hanging wires. The power transformation framework 1000 further comprises a shielding case 100, the shielding case 100 comprises a first main body 110 and a second main body 120, the first main body 110 and the second main body 120 are both shells and are oppositely arranged to form a shielding cavity 130, and the lower end of the shielding cavity 130 penetrates through the periphery of the end flange 1300 and is used for covering the periphery of the end flange. The second body 120 is provided with a mounting hole 123 at a side opposite to the first body 110, the inner walls of the first body 110 and the second body 120 are respectively provided with a mounting part 140 for connecting an end flange 1300, the shielding case 100 is covered on the outer periphery of the end flange 1300 so that the end flange 1300 is located in the shielding cavity 130, and the end flange 1300 is connected with the cross beam 1100 by extending out of the shielding case 100 through the mounting hole 123. The shield case 100 prevents abnormal corona discharge from occurring in the end flange 1300 to which the wires are directly attached to the power transformation frame 1000, thereby achieving a voltage-sharing effect, and maintaining good electrical performance while shortening the overall length of the power transformation frame 1000.

In this embodiment, the end flange 1300 has a flange cylinder 1310, and the flange cylinder 1310 extends through the mounting hole 123 to the outside of the shielding cage 100 to be connected to the cross member 1100. The end flange 1300 has a flange 1310 that mates with the mounting hole 123 of the shield 100 to facilitate installation.

In this embodiment, the mounting member 140 is fixedly attached to the upper surface 1320 of the end flange 1300. The end flange 1300 has a plurality of screw holes on its upper surface 1320 for matching with the through holes 1411 of the mounting plate 141 and then connecting with screws, so as to facilitate connection with the mounting component 140 of the shielding case 100.

In other embodiments, the structure of the shield can may be any of the embodiments described above.

In this embodiment, specifically, the power transformation framework 1000 includes at least two support assemblies 1200 and a beam 1100, the support assemblies 1200 are disposed at intervals along the first direction a, the beam 1100 is erected between two adjacent support assemblies 1200, and the support assemblies 1200 support the beam 1100. The beam 1100 is used for hanging a wire. The at least one support assembly 1200 includes a first support portion 1210 and a second support portion 1220 connected to each other, the first support portion 1210 is located between the cross beam 1100 and the second support portion 1220, the first support portion 1210 is made of a composite insulating material, and the second support portion 1220 is made of a metal material. Since the first support portion 1210 connected to the beam 1100 is made of a composite insulating material and has excellent electrical insulating properties, the electrical safety distance between the conductive line and the support assembly 1200 can be reduced, and the width and the land acquisition cost of the power transformation frame 1000 can be effectively reduced, and the second support portion 1220 is made of a metal material, so that the cost can be reduced. In addition, the support assembly 1200 with the composite structure has light weight and is not easy to rust and crack, so that the problem of difficulty in transportation, installation and maintenance is solved, and the transportation, installation and maintenance cost is reduced.

In the present embodiment, in order to further reduce the width of the power transformation structure 1000, all the support assemblies 1200 include the first support 1210 and the second support 1220, the first support 1210 is made of a composite insulating material, so as to fully exert the electrical insulation performance thereof, and reduce the electrical safety distance between the wires and the support assemblies 1200 to the maximum extent, thereby reducing the width and the ground charge of the power transformation structure.

In the traditional power transformation framework, the cross beam is made of metal materials, and a strain insulator string, a suspension insulator string or a jumper wire is required to be combined to connect the lead, so that the whole height of the power transformation framework is higher. In this embodiment, the beam 1100 is made of a composite insulating material, has excellent electrical insulating properties, can be directly used for hanging a wire, and does not need to adopt a structure such as a suspension insulator, and since the ground height of the wire is fixed, after the hanging of the wire by the suspension insulator is cancelled, the height of the power transformation frame 1000 can be integrally reduced, and the material consumption of the structure such as the suspension insulator and the material consumption of the support assembly 1200 are reduced; moreover, strain insulator strings, suspension insulator strings and jumper wires are saved, and the problem of windage yaw discharge which can exist in the power transformation framework 1000 can be solved; the power transformation framework 1000 made of the composite insulating material is light in weight, not prone to rusting and cracking, high in transportation and installation efficiency, capable of achieving a full life cycle and free of maintenance, and capable of reducing operation and maintenance costs of an original porcelain insulator chain.

In this embodiment, two supporting assemblies 1200 are spaced apart along the first direction a, and in this case, the power transformation frame 1000 is a single-span power transformation frame 1000.

In other embodiments, the support assemblies are spaced apart along the first direction by at least three, for example, three, four or more, and the power transformation framework is a row power transformation framework.

The power transformation frame 1000 of the present embodiment employs the shielding case 100, so that the end flange 1300 directly hanging the wires on the power transformation frame 1000 does not generate abnormal corona discharge, and achieves a voltage-sharing effect, thereby maintaining good electrical performance while shortening the overall length of the power transformation frame 1000.

While the invention has been described with reference to the above disclosure, it will be understood by those skilled in the art that various changes and modifications in the above-described structures and materials, including combinations of features disclosed herein either individually or in any combination, will be apparent to one skilled in the art from the disclosure herein. These variants and/or combinations fall within the technical field of the present invention and are intended to be protected by the following claims.

Claims

1. A shielding cage, characterized by: the shielding cover comprises a first main body and a second main body, wherein the first main body and the second main body are shells and are oppositely arranged to form a shielding cavity, the lower end of the shielding cavity is communicated, the second main body is provided with a mounting hole at one side opposite to the first main body, and the inner walls of the first main body and the second main body are respectively provided with a mounting part used for connecting external parts.

2. The shield of claim 1, wherein: first main part is including relative preceding face, the back face that sets up, connection preceding face with the semicircle face of back face, the edge of first main part sets up the turn-up.

3. The shield of claim 1, wherein: the second main body comprises a first split body and a second split body, and the first split body and the second split body are structurally symmetrical.

4. The shield of claim 3, wherein: the first split body comprises two mutually perpendicular plate surfaces, and a curled edge is arranged at the edge of the first split body.

5. The shield of claim 3, wherein: and semicircular notches are arranged on the sides, close to each other, of the first split body and the second split body to form the mounting holes.

6. The shield of claim 1, wherein: the shielding cover is made of metal.

7. The shield of claim 1, wherein: the mounting component is a plurality of mounting panels, mounting panel one end with the inner wall fixed connection of shield cover, the mounting panel other end sets up the through-hole and is used for connecting.

8. The utility model provides a power transformation framework, includes the crossbeam and sets up the supporting component at crossbeam both ends, the crossbeam with the supporting component passes through tip flange joint, its characterized in that: the transformer framework still includes the shield cover, the shield cover includes first main part and second main part, first main part with the second main part is the casing and sets up relatively and forms the shielding chamber, the second main part with one side that first main part is relative sets up the mounting hole, first main part with the inner wall of second main part sets up the installing component respectively and is used for connecting the tip flange, the shield cover is located the tip flange periphery makes the tip flange is located the shielding intracavity, the tip flange passes through the mounting hole with the crossbeam is connected.

9. A power transformation frame as claimed in claim 8, wherein said end flanges have flange barrels extending through said mounting holes to the outside of said shield enclosure for connection to said beam.

10. A transformation frame according to claim 8, wherein said mounting members are fixedly attached to an upper surface of said end flanges.