CN211239300U - Fully-shielded European sleeve - Google Patents
Fully-shielded European sleeve Download PDFInfo
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- CN211239300U CN211239300U CN201922151321.2U CN201922151321U CN211239300U CN 211239300 U CN211239300 U CN 211239300U CN 201922151321 U CN201922151321 U CN 201922151321U CN 211239300 U CN211239300 U CN 211239300U
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Abstract
The utility model relates to the technical field of electrical equipment, in particular to a fully-shielded European-style sleeve, which comprises an L-shaped insulating body, wherein a high-voltage conductor and two shielding nets are arranged in the insulating body, the high-voltage conductor extends to the two ends of the insulating body, the shielding nets are sleeved on the high-voltage conductor, a gap is arranged between the shielding nets and the high-voltage conductor, and an insulator is filled in the gap; the surface of the insulating body is provided with mounting nuts corresponding to the shielding nets, and the mounting nuts are connected with the corresponding shielding nets; the utility model has the advantages that through the structure of the two shielding nets, when the high-voltage conductor is electrified, the induction capacitor generates a low-voltage electric signal, and the prompting and warning effect is achieved by connecting the electric display; the electric field structure of the body part can be adjusted and insulated, and the electric field intensity of the part can be reduced; the insulating body is in a right-angle shape, the cable trend is in a left, middle and right horizontal structure with a phase sequence, the space in the cabinet is limited, and the arrangement mode is beneficial to the installation of high-voltage cables and accessories.
Description
Technical Field
The utility model relates to an electrical equipment technical field, concretely relates to shield european style sleeve pipe entirely.
Background
In a medium-voltage distribution network, a certain distance exists between a switch cabinet and a user transformer for various reasons, the connection is required to be realized through a high-voltage insulated cable, and a cable distribution box is arranged in a certain distance in consideration of the factors such as convenience during cable laying, overhauling, troubleshooting and the like.
A cable distribution box is an apparatus for performing distribution, branching, splicing and conversion circuits on cable lines, and is mostly used outdoors. Cable distribution boxes are divided into two main categories according to their electrical composition: one type of the cable tapping box does not contain any tapping box equipment, only accessories for processing and connecting cable ends are arranged in the box body, the structure is simpler, the volume is smaller, the function is single, and the cable tapping box can be called as a common tapping box; the other type is that the box not only has accessories of a common tapping box, but also contains one or more tapping box devices, the structure is complex, the volume is large, the number of connecting devices is large, the manufacturing technology difficulty is large, the manufacturing cost is high, and the box can be called as a high-grade tapping box.
The sleeve is an indispensable insulator for the tapping, branching and switching of the junction box of the cable line.
The main defects of the traditional sleeve are as follows:
1. the insulating layer epoxy resin of the sleeve can generate capacitance to ground and cannot be contacted; discharge can be generated in dirty and humid environments, and the environment resistance is poor;
2. when an accident occurs, interphase breakdown and explosion are easy to occur, high-temperature and high-pressure gas is generated, and serious damage is caused to property and life;
3. the insulating layer on the surface of the pipe is of a coated insulating structure, so that the excellent insulating property of the epoxy resin cannot be fully utilized, and the insulating layer is ensured by the air insulating distance, so that the space of the tapping box is large;
4. cannot achieve true miniaturization and poor environmental resistance.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to solve the technical problem that an easy to assemble, high-reliability fully-shielded European style sleeve is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be:
the full-shielding European-style bushing comprises an L-shaped insulating body, wherein a high-voltage conductor and two shielding nets are arranged in the insulating body, the high-voltage conductor extends to two ends of the insulating body, the shielding nets are sleeved on the high-voltage conductor, a gap is formed between each shielding net and the high-voltage conductor, an insulator is filled in the gap, and the insulator and the insulating body are integrally formed;
and the surface of the insulating body is provided with a mounting nut corresponding to the shielding net, and the mounting nut is connected with the corresponding shielding net.
The beneficial effects of the utility model reside in that: through the structure of the two shielding nets, the first shielding net is used for indicating the electrified state of the distribution box, when the high-voltage conductor is electrified, the induction capacitor generates a low-voltage electric signal, and the high-voltage electrified display is connected to achieve the prompting and warning functions, so that the cable distribution box does not need to be specially provided with a high-voltage sensor; secondly, the electric field structure of the main body part is adjusted through the shielding net, the electric field intensity of the part is reduced, and the control requirements of the tapping box equipment on power frequency withstand voltage and local discharge capacity are met under the condition that the surface of the insulating body is grounded; the shielding sleeve can safely penetrate through the metal plate, the tapping box can be provided with a plurality of compartments, the safety (metal plate grounding) during maintenance is improved, and the phenomenon of 'fire burning and continuous operation' during fault isolation is reduced.
The insulating body is in a right-angle shape, the cable runs to a left, middle and right horizontal structure in a phase sequence, under the condition that the space in the cabinet is limited, the arrangement mode is most beneficial to the field installation (a substation) of the high-voltage cable and accessories, the electrical property and the heat resistance of a high-voltage loop depend on the quality of the installation of the cable and the accessories, and the accident caused by the installation quality accounts for about 80 percent of the accident.
Drawings
Fig. 1 is a cross-sectional view of a fully shielded euro-type casing according to an embodiment of the present invention;
description of reference numerals: 1. an insulating body; 2. a high voltage conductor; 3. a shielding mesh; 4. mounting a nut; 5. a zinc layer.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, the utility model discloses a fully shielded european style bushing, including L-shaped insulator 1, be provided with high voltage conductor 2 and two shielding nets 3 in the insulator 1, high voltage conductor 2 extends to insulator 1 both ends, shielding net 3 cover is established on high voltage conductor 2 and shielding net 3 cover has the clearance with high voltage conductor 2 between, the clearance intussuseption is filled with the insulator, the insulator forms with insulator 1 is integrated into one piece;
the surface of the insulating body 1 is provided with a mounting nut 4 corresponding to the shielding net 3, and the mounting nut 4 is connected with the corresponding shielding net 3.
From the above description, the working principle of the present invention is: when the conductor passes through the installation surface made of metal materials, because the metal installation surface is an extremely uneven electric field and requires a certain ground distance, the shielding net 3 is adopted to change the extremely uneven electric field into a slightly uneven electric field, the electric field intensity is reduced, the safety margin is improved, and meanwhile, the shielding net 3 and the metal zinc shielding layer generate secondary induction signals which can be directly grounded or connected with a secondary display or controller.
The electric field structure is adjusted through the shielding net 3, so that the overall electric field intensity of the connecting end of the isolation tapping box is reduced, and the electrical performance requirement is met.
The partial surface exposed in the air has a metal grounding layer, so that the insulating body 1 can not generate interphase short circuit and is not influenced by the external environment.
From the above description, one is used to indicate the electrified state of the distribution box through the structure of the two shielding nets 3, when the high-voltage conductor 2 is electrified, the induction capacitor generates a low-voltage electric signal, and the prompting and warning effects are achieved by connecting the high-voltage electrified display, and the cable distribution box does not need to be specially configured with a high-voltage sensor; secondly, the electric field structure of the part of the insulating body 1 is adjusted through the shielding net 3, the electric field intensity of the part is reduced, and the control requirements of the tapping box equipment on power frequency withstand voltage and local discharge capacity are met under the condition that the surface of the insulating body 1 is grounded; the shielding sleeve can safely penetrate through the metal plate, the tapping box can be provided with a plurality of compartments, the safety (metal plate grounding) during maintenance is improved, and the phenomenon of 'fire burning and continuous operation' during fault isolation is reduced.
Further, the surface of the insulating body 1 is metallized.
From the above description, it can be known that the sleeve part is subjected to surface metallization treatment, that is, the exposed part of the fully-shielded european sleeve is at ground potential, and when the external environment is severe, such as dirt and moisture, the performance of the insulating body 1 is not affected, such as discharge, water tree aging and the like; the air insulation distance can be not considered in the interphase distance, so that the space size required by the tapping box is reduced; because each phase has the grounding metal layer on the surface, the distribution box can not generate interphase short circuit fault, and the damage degree caused by the fault is greatly reduced.
Further, the insulator and the insulator body 1 are molded into an integral structure by an epoxy resin automatic pressure gel molding process.
From the above description, it can be known that the mechanical properties of the fully-shielded european bushing can be obviously improved by forming the fully-shielded european bushing into an integral structure through the epoxy resin automatic pressure gel forming process, and meanwhile, the precision of the forming through the epoxy resin automatic pressure gel forming process is higher, the dimensional accuracy of the insulating body 1 can be improved, and the fully-shielded european bushing is beneficial to matching with a mechanism and a box body, reduces contact resistance, has high interchangeability, has few possible partial discharge nodes, long service life, low cost, light weight, labor-saving and convenient installation and low requirements of installers.
Further, the outer surface of the insulating body 1 is subjected to sand blasting.
From the above description, it can be seen that the mechanical properties of the surface of the insulator 1 are improved by the blasting treatment, which results in the surface of the insulator 1 obtaining a certain degree of cleanliness and different degrees of roughness due to the impact and cutting action of the abrasive on the surface of the insulator 1, thus improving the fatigue resistance of the insulator 1, increasing the adhesion between it and the coating, prolonging the durability of the coating, and facilitating the leveling and decoration of the coating.
Further, a metal layer is plated on the outer surface of the insulating body 1.
Further, the metal layer is a zinc layer 5.
From the above description, it can be seen that the zinc layer 5 can be used as a shielding layer and can generate a secondary sensing signal, which can be directly connected to ground or a secondary display or controller.
Further, the central axes of the two shielding nets 3 are vertically arranged.
As can be seen from the above description, the central axes of the two shielding nets 3 are vertically arranged, so that a sufficient distance between the two shielding nets 3 can be ensured, and the nut 4 can be conveniently installed.
Example one
A full-shielding European-style bushing comprises an L-shaped insulating body, wherein a high-voltage conductor and two shielding nets are arranged in the insulating body, central axes of the two shielding nets are vertically arranged, the high-voltage conductor extends to two ends of the insulating body, the shielding nets are sleeved on the high-voltage conductor, a gap is formed between each shielding net and the high-voltage conductor, an insulator is filled in each gap, and the insulator and the insulating body are integrally formed;
and the surface of the insulating body is provided with a mounting nut corresponding to the shielding net, and the mounting nut is connected with the corresponding shielding net.
And carrying out metallization treatment on the surface of the insulating body.
The insulator and the insulator body are molded into an integral structure through an epoxy resin automatic pressure gel molding process.
The outer surface of the insulating body is subjected to sand blasting treatment.
The outer surface of the insulating body is plated with a zinc layer.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (7)
1. A full-shielding European-style bushing is characterized by comprising an L-shaped insulating body, wherein a high-voltage conductor and two shielding nets are arranged in the insulating body, the high-voltage conductor extends to two ends of the insulating body, the shielding nets are sleeved on the high-voltage conductor, a gap is formed between each shielding net and the high-voltage conductor, an insulator is filled in the gap, and the insulator and the insulating body are integrally formed;
and the surface of the insulating body is provided with a mounting nut corresponding to the shielding net, and the mounting nut is connected with the corresponding shielding net.
2. The fully shielded euro-type bushing according to claim 1, wherein the surface of the insulator body is metallized.
3. The fully shielded euro-type bushing according to claim 1, wherein the insulator and the insulator body are molded as a unitary structure by an epoxy automatic pressure gel molding process.
4. The fully shielded euro-sleeve of claim 1 wherein the outer surface of the insulative body is grit blasted.
5. The fully shielded euro-type bushing according to claim 4, wherein the outer surface of the insulative body is plated with a metal layer.
6. The fully shielded euro-type bushing according to claim 5, wherein the metal layer is a zinc layer.
7. The fully shielded euro-type bushing according to claim 1, wherein the central axes of the two shielding meshes are vertically disposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922151321.2U CN211239300U (en) | 2019-12-04 | 2019-12-04 | Fully-shielded European sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922151321.2U CN211239300U (en) | 2019-12-04 | 2019-12-04 | Fully-shielded European sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211239300U true CN211239300U (en) | 2020-08-11 |
Family
ID=71915976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922151321.2U Active CN211239300U (en) | 2019-12-04 | 2019-12-04 | Fully-shielded European sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211239300U (en) |
-
2019
- 2019-12-04 CN CN201922151321.2U patent/CN211239300U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A fully shielded European casing Effective date of registration: 20210419 Granted publication date: 20200811 Pledgee: Bank of China Limited Xiamen Jimei sub branch Pledgor: XIAMEN HUANYUAN ELECTRIC POWER TECHNOLOGY Co.,Ltd. Registration number: Y2021980002758 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |