CN215119852U

CN215119852U - Ring main unit of gas insulated vacuum circuit breaker

Info

Publication number: CN215119852U
Application number: CN202121463054.3U
Authority: CN
Inventors: 刘泽阳; 黄生; 罗平涛
Original assignee: Hunan Lke Electric Appliances Co ltd
Current assignee: Hunan Lke Electric Appliances Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-12-10
Anticipated expiration: 2031-06-29

Abstract

The utility model discloses a gas insulated vacuum circuit breaker ring main unit, which comprises a gas tank, wherein a vacuum circuit breaker and a grounding switch connected with the vacuum circuit breaker are arranged in the gas tank, a K-shaped spring operating mechanism for controlling the vacuum circuit breaker is arranged at the front upper part of the gas tank, and an isolation operating mechanism linked with the grounding switch is arranged at the front lower part of the gas tank; the vacuum circuit breaker comprises a switch frame, an epoxy partition plate assembly is arranged in the middle of the switch frame, three vacuum arc-extinguishing chamber assemblies are distributed in parallel on the epoxy partition plate assembly, a lower static contact of an isolating switch is arranged on the upper portion of each vacuum arc-extinguishing chamber assembly, an isolating switch moving contact is arranged on the upper portion of the lower static contact, an insulator is arranged on the upper portion of the switch frame, and an upper static contact of the isolating switch is arranged on the insulator. The utility model discloses collect isolator, vacuum circuit breaker, earthing switch as an organic whole, the current capacity that makes gaseous looped netowrk cabinet can bear is showing the increase.

Description

Ring main unit of gas insulated vacuum circuit breaker

Technical Field

The utility model relates to a middling pressure electric power system equipment especially relates to a gas insulated vacuum circuit breaker looped netowrk cabinet.

Background

At present, traditional 10kV medium voltage alternating current gas insulation vacuum circuit breaker looped netowrk cabinet structure is various: the application amount of the load switch cabinet (C cabinet), the combined electrical appliance cabinet (F cabinet) and the breaker cabinet (V cabinet) is large, the parameters are only 630A/20kA or 630A/31.5kA (fuse), and a small amount of 1250A/25kA appears in the market of the breaker unit cabinet; but the performance stability and safety are not very reliable, and the mechanical life is not high; although the three-station isolating switch is divided into a bus side and a line side, the three-station switch on the line side is only grounded to a cable end loop, and the switch body is not reliably grounded, so that potential safety hazards to maintainers still exist. The short-circuit on-off capability of the grounding switch cannot be met, and the short-circuit on-off capability of the grounding switch of the combined electrical appliance unit cabinet (F cabinet) is only 5kA (peak value).

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a structure is compacter, and rated parameter is higher to 1250A 31.5kA, collects isolator, vacuum circuit breaker simultaneously, down earthing switch combined function type gas-insulated vacuum circuit breaker looped netowrk cabinet as an organic whole, its isolator also belongs to the linkage operation with earthing switch.

Realize the utility model discloses the technical scheme of purpose is: the utility model provides a gas insulation vacuum circuit breaker looped netowrk cabinet, includes the gas tank, inside vacuum circuit breaker that is equipped with of gas tank and with earthing switch that vacuum circuit breaker links to each other, upper portion is equipped with before the gas tank and is used for control vacuum circuit breaker's K type spring operation mechanism, the lower part be equipped with before the gas tank with earthing switch linked's isolation operating device.

Preferably, the vacuum circuit breaker comprises a switch frame, an epoxy partition plate assembly is arranged in the middle of the switch frame, three vacuum arc-extinguishing chamber assemblies are distributed in parallel on the epoxy partition plate assembly, a lower static contact of a disconnecting switch is arranged on the upper portion of each vacuum arc-extinguishing chamber assembly, a moving contact of the disconnecting switch is arranged on the upper portion of the lower static contact, an insulator is arranged on the upper portion of the switch frame, an upper static contact of the disconnecting switch is arranged on the insulator, a lower outgoing line conductive copper bar is arranged outside the epoxy partition plate assembly, a flexible connection copper bar connected with the vacuum arc-extinguishing chamber assemblies is arranged on the upper portion of the lower outgoing line conductive copper bar, and a static contact device of a grounding switch used for connecting the grounding switch is arranged between the lower outgoing line conductive copper bars.

By adopting the technical scheme, the utility model discloses following beneficial effect has: (1) the invention integrates the disconnecting switch, the vacuum circuit breaker and the grounding switch into a whole, so that the structure is more compact, the disconnecting switch and the grounding switch are also in linkage operation, the current capacity of the gas ring main unit can be obviously increased, and the rated parameter is improved to 1250A/31.5 kA;

(2) the fixed side-mounted gas insulated vacuum circuit breaker installs the disconnecting switch, the vacuum arc extinguish chamber, the lower outgoing line conductive copper bar and the grounding switch on the epoxy partition plate in the middle of the switch frame in a parallel mode, so that the fixed side-mounted vacuum circuit breaker is more compact in structure, and the stable operation of the circuit breaker has higher reliability while the installation space of the gas tank is effectively saved. In addition, the lower grounding switch can realize reliable grounding of the cable end loop and the switch body;

(3) the vacuum circuit breaker adopts a frame type structure in the main structural design, a fourth generation novel K-shaped spring operation mechanism and a three-phase vacuum arc extinguish chamber component which are optimized in design are fixed on the frame in a front-back arrangement mode, three vacuum arc extinguish chamber components are distributed on an epoxy clapboard component fixed on the frame in parallel, an isolating switch is arranged on a bracket at the upper part of the vacuum arc extinguish chamber, and a lower outgoing conductive copper bar is connected through a flexible connecting copper bar to form a main loop;

(4) as the utility model discloses technical scheme's key improvement, coaxial drive between its circuit breaker mechanism transmission mode breaks through traditional mechanism axle and the circuit breaker main shaft borrows the different axle drive transformation ratio technique of VS1 handcart circuit breaker maturity ingeniously, improves vacuum interrupter's contact pressure, acquires higher short circuit breaking capacity.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is another view angle overall structure diagram of the present invention;

FIG. 3 is a front view of the present invention;

fig. 4 is a side view of the present invention;

FIG. 5 is a cross-sectional view of FIG. 4;

figure 6 is a schematic view of the epoxy spacer assembly of the present invention.

Detailed Description

Referring to fig. 1 to 6, the ring main unit of the gas insulated vacuum circuit breaker of the embodiment includes a gas box 2, a vacuum circuit breaker 16 and an earthing switch 11 connected to the vacuum circuit breaker are arranged inside the gas box 2, a K-type spring operating mechanism 14 for controlling the vacuum circuit breaker is arranged on the front upper portion of the gas box 2, and an isolation operating mechanism 15 linked with the earthing switch is arranged on the front lower portion of the gas box 2.

The vacuum circuit breaker 16 comprises a switch frame 1, an epoxy partition plate assembly 8 is arranged in the middle of the switch frame 1, three vacuum arc extinguish chamber assemblies 7 are distributed in parallel on the epoxy partition plate assembly 8, a lower isolating switch static contact 6 is arranged on the upper portion of each vacuum arc extinguish chamber assembly 7, an isolating switch moving contact 5 is arranged on the upper portion of the lower isolating switch static contact 6, an insulator 3 is arranged on the upper portion of the switch frame 1, an upper isolating switch static contact 4 is arranged on the insulator 3, a lower outgoing line conductive copper bar 10 is arranged outside the epoxy partition plate assembly 8, a flexible connecting copper bar 9 connected with the vacuum arc extinguish chamber assemblies 7 is arranged on the upper portion of the lower outgoing line conductive copper bar 10, and a grounding switch static contact device 12 used for connecting a grounding switch is arranged between the lower outgoing line conductive copper bars 10.

The vacuum circuit breaker adopts the mature different-shaft transmission ratio technology of a VS1 handcart circuit breaker.

In the implementation process, after the isolation switch is switched on by the isolation operation mechanism, after the switching-on spring 17 of the K-type spring operating mechanism is enabled to store energy manually or electrically, a mechanism switching-on button is pressed down, the stored energy is released by the switching-on spring to enable the cam 18 of the K-type spring operating mechanism 14 to work to drive the mechanism rotating shaft 19 to rotate for a certain working angle, then the joint bearing 20 and the middle connecting rod 21 which are connected with the mechanism rotating shaft drive the spline main shaft 22 of the vacuum circuit breaker to rotate for a certain angle, so that the connecting lever 23 on the spline main shaft drives the movable end contact 25 of the vacuum arc extinguish chamber to vertically move upwards for a certain working stroke, the vacuum circuit breaker completes switching-on, and the switching-off spring 24 stores energy. And pressing a mechanism opening button to release the mechanism, releasing energy by an energy-stored opening spring to enable the spline main shaft to rotate in the opposite direction, and completing opening by the vacuum circuit breaker.

Compared with the traditional hexagonal shaft made of insulating materials, the spline main shaft has higher load bearing capacity, uniform transmission stress, long strength service life and high automatic centering precision.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a gas insulated vacuum circuit breaker looped netowrk cabinet which characterized in that: including gas tank (2), gas tank (2) inside be equipped with vacuum circuit breaker (16) and with earthing switch (11) that vacuum circuit breaker links to each other, upper portion is equipped with before gas tank (2) and is used for control vacuum circuit breaker's K type spring operation mechanism (14), gas tank (2) preceding lower part be equipped with earthing switch linked isolation operating device (15).

2. The ring main unit for gas insulated vacuum circuit breakers according to claim 1, wherein: the vacuum circuit breaker (16) comprises a switch frame (1), an epoxy clapboard component (8) is arranged in the middle of the switch frame (1), three vacuum arc-extinguishing chamber assemblies (7) are distributed in parallel on the epoxy clapboard assembly (8), a lower static contact (6) of an isolating switch is arranged at the upper part of each vacuum arc-extinguishing chamber assembly (7), the upper part of the lower static contact (6) is provided with a moving contact (5) of an isolating switch, the upper part of the switch frame (1) is provided with an insulator (3), the insulator (3) is provided with an upper fixed contact (4) of the isolating switch, a lower outgoing line conductive copper bar (10) is arranged outside the epoxy clapboard component (8), the upper part of the lower outgoing line conductive copper bar (10) is provided with a flexible connection copper bar (9) connected with the vacuum arc extinguishing chamber component (7), and a static contact device (12) of the grounding switch for connecting the grounding switch is arranged between the lower outgoing line conductive copper bars (10).