CN201450297U

CN201450297U - GIB for GIS

Info

Publication number: CN201450297U
Application number: CN200920032553XU
Authority: CN
Inventors: 申春红; 马曾锐; 穆双录; 史方颖
Original assignee: China XD Electric Co Ltd
Current assignee: China XD Electric Co Ltd
Priority date: 2009-04-13
Filing date: 2009-04-13
Publication date: 2010-05-05
Anticipated expiration: 2019-04-13

Abstract

The utility model discloses a GIB for GIS, which comprises a plurality of bus housing segments in flanged connection, and the gas chamber division parts of the bus housing segments are connected through disc insulators. The GIB is characterized in that two ends of each housing segment adopt tapered structures, and the diameter in the middle is smaller than that at two ends; and for the part requiring no gas chamber division, an insulating platform support structure is adopted to support and connect with a conductor. The utility model adopts GIB with inconstant diameters, thereby reducing the electric field at the disc insulator connection parts; the coaxial electric field at the middle part is relatively uniform, thereby saving raw material for bus housing and SF6 gas consumption; and the GIB has the advantages of brief shape, simple structure, superior insulating property, convenient use and installation, etc.

Description

The GIS gas insulated bus

Technical field

The utility model relates to a kind of gas insulated bus that is used for Cubicle Gas-Insulated Switchgear (GIS).

Background technology

Traditional GIS equipment is to wait gauge structure with the housing of long bus, and the insulation of bus-bars conductor is supported for disc insulator, and the connecting portion design has independently earth connection between the bus housing, and outward appearance is wordy.In addition, use by the research of electric field analytic technique, find that the electric field at connection disc insulator position, bus two ends is bigger than bus middle part, therefore the diameter of bus shell, can't save bus housing raw material and SF by the diameter decision of used disc insulator ₆The consumption of gas.For not needing to carry out the position that air chamber is divided, need to increase the consumption of disc insulator, strengthened the weight of bus.

Summary of the invention

The purpose of this utility model provide a kind of can satisfy the GIS equipment requirements do not wait the gauge structure gas insulated bus, profile is succinct, and is simple in structure, insulation property are superior, and are easy to install, can save gas insulated bus to raw material and SF ₆The consumption of gas.

For reaching above purpose, the utility model takes following scheme to be achieved:

A kind of GIS gas insulated bus comprises the bus housing of flange connection, and bus housing air chamber is divided the position and connected with disc insulator, it is characterized in that, pyramidal structure is adopted at described every section bus housing two ends, and the middle part diameter is less than the two ends diameter; For not needing to carry out the position that air chamber is divided, employing insulation pad supporting structure supports conductor and is connected.

In the such scheme, described insulation pad supporting structure comprises the counter flange and the cover plate of insulation pad, bus housing side, is connected with cover plate by counter flange at the bottom of the platform of insulation pad; The platform top of insulation pad connects a special-shaped conductor, and the axial both ends of the surface of special-shaped conductor are connected with contact, by these two contacts bus-bars conductor are linked together.Described bus shell flange connecting portion, adopt the syndeton of sealing surface flange and seal groove flange, seal groove flange joint face is provided with special-shaped seal groove, and sealing ring is installed in the seal groove, and sealing ring is with the tight sealing-in of metal covering of sealing surface flange and seal groove flange.

Also be provided with the dovetail groove of a circle by way of the flange connecting hole in the seal groove periphery of seal groove flange, the sealing surface flange of this dovetail groove is provided with one or two pump nozzle that can inject anticorrisive agent and is communicated with dovetail groove relatively.

Compared with prior art, the utility model bus housing adopts conical design, and end diameter is bigger, can reduce the electric field of basin connecting portion, and the middle part is a coaxial electric field, and electric field is even relatively, and more isometrical like this housing can be saved 20% SF ₆Gas usage, the material usage of housing is saved more than 10% simultaneously.

Adopt the insulation pad supporting structure that conductor is supported at the position that does not need to divide air chamber, significantly reduce the consumption of disc insulator, and the sealing part of major loop, bus weight and difficulty of processing are reduced, and help improving the sealing property of major loop.Its insulation pad is the poured with epoxy resin structure, is the convenience of the installation and maintenance that make things convenient for conductor, and the special connected mode that insulation pad supporting structure and housing adopt when bus breaks down, satisfies the dismounting to any conductor, and maintenance utmost point fault recovery workload is little.

Bus shell flange connecting portion adopts the metal covering tight fit; and solve the anticorrosion problem of joint face at the dovetail groove that joint face is provided with special-purpose notes anti-corrosion material; the protection sealing ring is avoided environmental impact and premature aging; flange metal tight fit joint face no longer needs to smear fluid sealant; flange metal tight fit mask has excellent conducting performance like this; the shell flange joint face need not established independently earth connection, and the bus outward appearance is more succinct, and grounded circuit is safer reliable.

Description of drawings

Fig. 1 is the overall structure figure of the utility model gas insulated bus.

Fig. 2 is the enlarged drawing of Fig. 1 gas insulated bus insulation pad supporting construction.

Fig. 3 is the structure of Fig. 1 gas insulated bus shell flange connecting portion.

Fig. 4 is that the A-A of Fig. 3 is to partial sectional view.

Fig. 5 is that the B-B of Fig. 3 is to partial sectional view.

Among Fig. 1 to Fig. 5: 1, bus-bars conductor; 2, insulation pad supporting construction; 3, bus housing; 4, radome; 5, disc insulator; 6, contact; 7, contact radome; 8, special-shaped conductor; 9, insulation pad; 10, cover plate; 11, counter flange; 12, connecting bolt position; 13, anticorrisive agent injection phase; 14, bolt; 15, rainproof pad; 16, sealing surface flange; 17, seal groove flange; 18, sealing ring; 19, anticorrisive agent groove; 20, pump nozzle

Embodiment

Below in conjunction with accompanying drawing and instantiation the utility model is described in further detail.

As Fig. 1-shown in Figure 5, bus-bars conductor 1 adopts plug-in connection with contact 6, contact 6 is connected with special-shaped conductor 8 employing faces, fastening with screw, contact radome 7 is screwed on contact 6, insulation pad 9 assembles by the installing technological hole on the special-shaped conductor with special-shaped conductor 8, and insulation pad 9 is connected with cover plate 10 by counter flange 11.Housing seal face flange 16 adopts full line bolt 14 to be connected with seal groove flange 17, sealing ring 18 is installed in the special-shaped seal groove, special-shaped seal groove need not smeared fluid sealant and sealing ring can be fixed, can guarantee sealing surface flange 16 and seal groove flange 17 excellent conducting performance like this, anticorrisive agent can be injected anticorrisive agent groove 19 by pump nozzle 20.When maybe needing to disintegrate when breaking down, conductor 1 can be split out by dismounting insulation pad supporting construction 2, demounting procedure is as follows, the trip bolt of the fixing special-shaped conductor 8 of at first dismantling, the trip bolt of the radome 7 of dismantling then, radome 7 moved it is enclosed within on the conductor 1, then the trip bolt of fastening contact 6 is dismantled, contact 6 is outwards moved, contact adopts identical method for dismounting in addition, so special-shaped conductor 8 can be pulled down, and conductor 1 can utilize the space of special-shaped conductor 8 to dismantle.

In order to reduce sulfur hexafluoride gas and case material consumption, conical design is adopted at bus housing 3 two ends, and available casting or welding method realize that tapering part also is easy to guarantee the electric field strength of housing 3 and disc insulator 5 junctions simultaneously.

Claims

1. a GIS gas insulated bus comprises the bus housing that the multistage flange connects, and bus housing air chamber is divided the position and connected with disc insulator, it is characterized in that, pyramidal structure is adopted at described every section bus housing two ends, and the middle part diameter is less than the two ends diameter; For not needing to carry out the position that air chamber is divided, employing insulation pad supporting structure supports conductor and is connected.

2. GIS gas insulated bus as claimed in claim 1 is characterized in that, described insulation pad supporting structure comprises the counter flange and the cover plate of insulation pad, bus housing side, is connected with cover plate by counter flange at the bottom of the platform of insulation pad; The platform top of insulation pad connects a special-shaped conductor, and the axial both ends of the surface of special-shaped conductor are connected with contact, by these two contacts bus-bars conductor are linked together.

3. GIS gas insulated bus as claimed in claim 1, it is characterized in that, described bus shell flange connecting portion, adopt sealing surface flange and the full line bolt fastening structure of seal groove flange, seal groove flange joint face is provided with special-shaped seal groove, sealing ring is installed in the seal groove, and sealing ring is with the tight sealing-in of metal covering of sealing surface flange and seal groove flange.

4. GIS gas insulated bus as claimed in claim 3, it is characterized in that, also be provided with the dovetail groove of a circle by way of the flange connecting hole in the seal groove periphery of seal groove flange, the sealing surface flange of this dovetail groove is provided with one or two pump nozzle that can inject anticorrisive agent and is communicated with dovetail groove relatively.