CN212303527U

CN212303527U - Solid insulation switch structure of solid insulation ring main unit

Info

Publication number: CN212303527U
Application number: CN202020958292.0U
Authority: CN
Inventors: 郑鸥; 陈舒张; 赵锦波
Original assignee: Zhejiang Dongjia Electric Power Technology Co ltd
Current assignee: Zhejiang Dongjia Electric Power Technology Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-01-05
Anticipated expiration: 2030-05-29

Abstract

The utility model provides a solid insulation switch structure of solid insulation looped netowrk cabinet, includes fixed insulating cylinder, and pours into A \ B \ C looks generating line inlet conductor, vacuum interrupter, combined floodgate contact connecting piece, the conductor of being qualified for the next round of competitions in fixed insulating cylinder, A \ B \ C looks generating line inlet conductor passes through the flexible connectors and is connected with vacuum interrupter, solid insulation switch structure still includes isolation blade, isolation blade holder and ground connection shielding piece, combined floodgate contact connecting piece one end is connected with vacuum interrupter, and the other end is equipped with moves the contact seat, the conductor of being qualified for the next round of competitions is connected with the isolation blade holder down, should keep apart the blade holder isolation blade, it is equipped with the ground connection shielding piece to be equipped with the cover on the conductor of being qualified for the next round of competitions down. The electric field is optimized by a metal electrode shielding method through the grounding shielding piece arranged on the lower outgoing line conductor, so that the electric field distribution is improved, the partial discharge index is stabilized, the electric field concentration problem is effectively solved, and the use safety of the product is ensured.

Description

Solid insulation switch structure of solid insulation ring main unit

Technical Field

The invention relates to the technical field of solid insulated switches, in particular to a structure of a solid insulated switch.

Background

The Ring Main Unit (Ring Main Unit) is a group of transmission and distribution electrical equipment (high-voltage switch equipment) which is arranged in a metal or nonmetal insulating cabinet body or is made into electrical equipment of an assembled interval Ring Main power supply Unit, and the core part of the Ring Main Unit adopts a vacuum circuit breaker or a load switch and a fuse, so that the Ring Main Unit has the advantages of improving power supply parameters and performance, power supply safety and the like. The ring main units can be classified into air-insulated ring main units, SF6 gas (sulfur hexafluoride gas) -insulated inflatable ring main units and solid-insulated ring main units insulated by epoxy resin according to different insulating media. The transformer substation is widely applied to distribution stations and box-type substations of load centers of urban residential districts, high-rise buildings, large public buildings, factory enterprises and the like.

In the medium-voltage ring main unit, the application of SF6 gas is quite extensive. With the enhancement of the awareness of environmental protection, due to the use of a large amount of SF6 gas, pollution and damage to the environment on which human beings live are inevitable, and adverse effects on the health of human beings are brought. From the environmental protection perspective, electrical equipment with little or no use of SF6 gas should be a development direction in the high voltage electrical equipment manufacturing industry.

The solid insulation ring main unit adopts epoxy resin material as an insulator, organically combines a vacuum arc extinguish chamber, a main conductive loop, an insulation support and the like into a whole by a solid-sealed pole technology, and realizes the functions of load current distribution, load current combination or fault current isolation and the like through the movement of an operating mechanism, thereby realizing the control of a power supply and distribution system and the protection of equipment and personal safety. However, in the prior art, a large part of solid insulation parts are not shielded and protected, the index of partial discharge is unstable, the insulation cannot be recovered once the solid insulation is discharged, and meanwhile, the discharge can continuously increase and develop in the service life, and finally, insulation breakdown and interphase short circuit fault occur.

Disclosure of Invention

In order to solve the technical defects, the invention provides a solid insulation switch structure of a solid insulation ring main unit.

The technical scheme of the invention is as follows: the utility model provides a solid insulation switch structure of solid insulation looped netowrk cabinet, includes fixed insulating cylinder, and pours into A \ B \ C looks generating line inlet conductor, vacuum interrupter, combined floodgate contact connecting piece, the conductor of being qualified for the next round of competitions in fixed insulating cylinder, A \ B \ C looks generating line inlet conductor passes through the flexible connectors and is connected with vacuum interrupter, solid insulation switch structure still includes isolation blade, isolation blade holder and ground connection shielding piece, combined floodgate contact connecting piece one end is connected with vacuum interrupter, and the other end is equipped with moves the contact seat, the conductor of being qualified for the next round of competitions is connected with the isolation blade holder down, should keep apart the blade holder isolation blade, it is equipped with the ground connection shielding piece to be equipped with the cover on the conductor of being qualified for the next round of competitions down.

The utility model discloses a further setting: and the position of the fixed insulating cylinder relative to the grounding shielding piece is provided with a mounting hole and a steel screw, and two ends of the steel screw are respectively connected with the grounding shielding piece and the electrified display.

The utility model discloses a further setting: the cavity of blade is kept apart relatively to fixed insulating cylinder, is equipped with wave full skirt structure on the inner wall, and this full skirt structure surface is equipped with a plurality of depressed face, be equipped with a plurality of shrinkage pool on the depressed face.

The utility model discloses a further setting: the solid insulation switch structure further comprises an insulation pull rod, and the insulation pull rod is connected with the vacuum arc extinguish chamber.

The utility model has the advantages that: the electric field is optimized by a metal electrode shielding method through the grounding shielding piece arranged on the lower outgoing line conductor, so that the electric field distribution is improved, the partial discharge index is stabilized, the electric field concentration problem is effectively solved, and the use safety of the product is ensured.

Through the steel screw that sets up, connect the display in ground connection shielding part and area respectively, when equipment has operating voltage, in time warn, improve operation safety.

Through the wave full skirt structure that sets up, it is limited to overcome fixed insulating cylinder inner space, and electric insulation distance receives the problem of restriction, utilizes sunken face, the shrinkage pool of full skirt, under the prerequisite that does not increase fixed insulating cylinder volume, reaches the effect that increases electric insulation distance.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an embodiment of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is an enlarged view of FIG. 2 at B;

fig. 5 is a structural view of a ground shield according to an embodiment of the present invention.

The reference numbers in the drawings are respectively: 1. a bus incoming line conductor (11 for phase A, 12 for phase B and 13 for phase C); 2. a flexible connector; 3. a vacuum arc-extinguishing chamber; 4. a closing contact connecting piece (41 is a movable contact seat); 5. isolating the blade; 6. isolating the tool apron; 7. a lower outlet conductor; 8. a grounding shield (81 is a mesh, 82 is a mounting hole, and 83 is a steel screw); 9. and a fixed insulating cylinder (91 is an umbrella skirt, 92 is a concave surface, 93 is a concave hole, and 94 is an insulating pull rod).

Detailed Description

The incoming line of the present invention is described in detail with reference to the accompanying drawings, as shown in fig. 1-5, a solid insulation switch structure of a solid insulation ring main unit comprises a fixed insulation cylinder 9, an a \ B \ C phase bus incoming line conductor 1 poured in the fixed insulation cylinder 9, a vacuum arc extinguish chamber 2, a closing contact connecting piece 4, and a lower outgoing line conductor 7, wherein the a \ B \ C phase bus incoming line conductor 1 is connected with the vacuum arc extinguish chamber 2 through a flexible connecting piece 2, the solid insulation switch structure further comprises an isolation blade 5, an isolation blade holder 6 and a grounding shielding piece 8, one end of the contact connecting piece 4 is connected with the vacuum arc extinguish chamber 2, the other end is provided with a movable contact holder 41, the lower outgoing line conductor 7 is connected with the isolation blade holder 6, the isolation blade 5 is mounted on the isolation blade holder 6, the grounding shielding piece 8 is sleeved on the lower outgoing line conductor 7, the grounding shielding piece 8 is cylindrical, on the peripheral surface of which a plurality of meshes 81 are arranged.

The position of the fixed insulating cylinder 9 relative to the grounding shield 8 is provided with a mounting hole 82 and a steel screw 83, and two ends of the steel screw 83 are respectively connected with the grounding shield 8 and the live display.

The fixed insulating cylinder 9 is provided with a wave-shaped umbrella skirt 91 structure on the inner wall relative to the cavity for isolating the blade 5, the surface of the umbrella skirt 91 structure is provided with a plurality of concave surfaces 92, and the concave surfaces 92 are provided with a plurality of concave holes 93.

The solid insulated switch structure further comprises an insulated pull rod 94, and the insulated pull rod 94 is connected with the vacuum arc-extinguishing chamber 2.

Through the grounding shielding piece 8 arranged on the lower outgoing line conductor 7, electric field optimization is carried out by a metal electrode shielding method, so that electric field distribution is improved, partial discharge indexes are stabilized, the problem of electric field concentration is effectively solved, and the use safety of a product is ensured.

Through the steel screw 83 that sets up, connect the display in ground connection shielding member 8 and area respectively, when equipment has operating voltage, in time warn, improve operation safety.

Through the wave full skirt 91 structure that sets up, it is limited to overcome fixed insulating cylinder 9 inner space, and electric insulation distance receives the problem of restriction, utilizes the depressed face 92, the shrinkage pool 93 of full skirt 91, under the prerequisite that does not increase fixed insulating cylinder 9 volume, reaches the effect that increases electric insulation distance.

It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.

Claims

1. The utility model provides a solid insulation switch structure of solid insulation looped netowrk cabinet which characterized in that: including fixed insulating cylinder, and pour into a mould A \ B \ C looks generating line inlet conductor, vacuum interrupter, combined floodgate contact connecting piece, the conductor of being qualified for the next round of competitions in fixed insulating cylinder, A \ B \ C looks generating line inlet conductor passes through flexible connectors and is connected with vacuum interrupter, solid insulation switch structure still includes isolation blade, isolation blade holder and ground shield, combined floodgate contact connecting piece one end is connected with vacuum interrupter, and the other end is equipped with moves the contact seat, the conductor of being qualified for the next round of competitions is connected with the isolation blade holder down, is equipped with the isolation blade on this isolation blade holder, the cover is equipped with ground shield on the conductor of being qualified for the next round of competitions down, and this ground shield is the cylindric, is equipped with a.

2. The solid insulation switch structure of the solid insulation ring main unit according to claim 1, wherein: and the position of the fixed insulating cylinder relative to the grounding shielding piece is provided with a mounting hole and a steel screw, and two ends of the steel screw are respectively connected with the grounding shielding piece and the electrified display.

3. The solid insulation switch structure of the solid insulation ring main unit according to claim 1, wherein: the cavity of blade is kept apart relatively to fixed insulating cylinder, is equipped with wave full skirt structure on the inner wall, and this full skirt structure surface is equipped with a plurality of depressed face, be equipped with a plurality of shrinkage pool on the depressed face.

4. The solid insulation switch structure of the solid insulation ring main unit according to claim 1, wherein: the solid insulation switch structure further comprises an insulation pull rod, and the insulation pull rod is connected with the vacuum arc extinguish chamber.