CN202111407U

CN202111407U - Dry air insulated metal enclosed switchgear

Info

Publication number: CN202111407U
Application number: CN2011201870969U
Authority: CN
Inventors: 国世峥; 刘广斧; 王利
Original assignee: SHENYANG HUALI ENERGY EQUIPMENT MANUFACTURING Co Ltd
Current assignee: SHENYANG HUALI ENERGY EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2010-08-23
Filing date: 2011-05-29
Publication date: 2012-01-11
Anticipated expiration: 2021-05-29

Abstract

Dry air insulated metal enclosed switchgear solves the technical problem that an existing structure cannot be applied to gas insulated metal enclosed switchgear with dry air serving as an insulating medium, and is characterized in that a shielding ring is mounted at the joint of a three-position switch and a branch bus, a groove at the junction of an insulator and a high-voltage terminal of an inner conical sleeve of a main bus is a circular arc opening so that a circular arc groove is formed, an upper cone frustum of the insulator and the conical surface of the insulator are in circular arc transition so that a circular arc boss is formed, the outer surface of the insulator is a protruding arc-shaped conical surface, and the outer surface of an insulator of a pull bar insulator is a protruding arc-shaped surface. The dry air insulated metal enclosed switchgear has the advantages that the improved insulating structure of equipment enables electric fields inside and outside a product to be more even and improves the puncture voltage level, and the dry air insulated metal enclosed switchgear with the improved insulating structure can avoid corona, discharge and flashover, so that the technical problem of use of dry air to replace SF6 (sulfur hexafluoride) gas as the insulating medium is solved.

Description

A kind of dry air insulated metal sealing switch equipment

Technical field

The utility model belongs to high voltage electrical apparatus technical field, particularly a kind of dry air insulated metal sealing switch equipment.

Background technology

Present existing Cubicle Gas-Insulated Switchgear generally adopts SF ₆(sulphur hexafluoride) gas is as dielectric, and SF ₆Gas is one of greenhouse gases of Kyoto Protocol predetermined restricted discharging, and its greenhouse effect are 29000 times of carbon dioxide, simultaneously SF ₆Gas can produce toxic and harmful under the effect of electric arc, adopt clean dried compressed air to substitute SF as dielectric ₆Gas is important measures that realize energy-saving and emission-reduction, protection environment.What prior art adopted is contained in pole, three-station, instrument transformer and the outside inner cone insulator that is the frustum shape in the gas tank of a sealing; Be electrically connected with bus; The bus junction does not have shading ring; And the insulator exterior of the link insulator in the pole is designed to cylindrical surface, and its insulating capacity is lower, but because SF ₆Gas has good insulation performance performance and arc extinguishing ability, so the structure of above-mentioned gas insulated metal sealing switch equipment can adopt SF ₆Gas is as dielectric, and the insulation property of dried compressed air are lower than SF ₆Gas; If the structure of existing Cubicle Gas-Insulated Switchgear charges into dried compressed air as dielectric; Because the insulating capacity of dried compressed air is lower; Will high-pressure sections such as bus junction and inner cone insulator and link insulator produce alternate with relatively discharge and punch-through, so existing structure can not be applied to adopt the Cubicle Gas-Insulated Switchgear of dry air as dielectric.

Summary of the invention

The utility model problem to be solved is; Overcome deficiency and defective that prior art exists; On the basis of clean dried compressed air insulation characterisitic being carried out theoretical and analysis of experiments; Be designed to the basis with the Computer Simulation Optimization electric field, Electric Field Distribution and insulation system are improved, a kind of dry air insulated metal sealing switch equipment that can adopt dried compressed air as dielectric is provided.

The technical solution that the utility model adopted comprises gas tank unit, low-pressure chamber, mechanism chamber and cable vault; Three-station in the gas tank unit, pole; No. 3 inner cone gang socket and No. 2 inner cone gang socket; On the left shrouding of gas tank with right shrouding on the main bus bar inner cone sleeve pipe that is connected; Be connected through branch bus between main bus bar inner cone sleeve pipe and the three-station; At said three-station and branch bus junction the smooth shading ring of surperficial circular arc is installed, said pole comprises pole shell, vacuum interrupter, link insulator and moved end outlet seat and the quiet line seat that brings out, and link insulator is installed in pole enclosure moved end; Said pole shell is to seal the epoxy package that pours into admittedly through automatic pressure gelation process, and this epoxy package is enclosed in vacuum interrupter and moved end outlet seat and the quiet line seat that brings out together admittedly.

The insulator of described main bus bar inner cone sleeve pipe and the groove at HV Terminal junction surface are the circular arc mouth; Form an arc groove; Arc transition is adopted on the last round platform of insulator and the cone of insulator surface, forms a circular arc boss, and the outer surface of insulator is the protrusion arc conical surface.

The insulator outside surface of said link insulator is protruding curved surfaces, and its screw rod is pressed the high-pressure side of annotating at insulator as inserts, and its sleeve is pressed the low-pressure end of annotating at insulator as inserts.

Compared with prior art; The beneficial effect of the utility model is owing to increased shading ring in the bus junction, to have improved the insulation system of equipment simultaneously; Comprise the outer surface design that has improved inner cone insulator and pole draw-in bar insulator; Inner cone insulator and link insulator outer surface are designed to protruding curved surfaces, have optimized the Electric Field Distribution state here, make the inside and outside electric field of product more even; Improved the puncture voltage level; Corona, discharge and flashover phenomenon can not appear in use in dried compressed air insulated metal sealing switch equipment, under the constant situation of pole length, use in dried compressed air electric discharge phenomena can not occur in as the Cubicle Gas-Insulated Switchgear of dielectric; The compressed air of clean dried that therefore can adopt a little higher than atmospheric pressure 0.13MPa substitutes SF as dielectric thereby solved the employing dry air ₆Gas is as the technical problem of dielectric, and the use of no greenhouse gas and limit exhaust body has been played protective effect effectively to environment, and equipment do not receive ectocine, and reliability is high, volume is little, and cost is lower.

Description of drawings

Fig. 1 is the left view of the utility model structural representation,

Fig. 2 is the A-A cutaway view of Fig. 1,

Fig. 3 is the structural representation of the utility model pole,

Fig. 4 is the B-B cutaway view of Fig. 1,

Fig. 5 is the sketch map of the utility model main bus bar inner cone sleeve pipe,

Fig. 6 is the sketch map of the utility model link insulator.

Among the figure:

1. branch bus, 2. three-station, 3. pole, 3-1. pole shell,

3-2. vacuum interrupter, the 3-3. link insulator, the curved surfaces that the 3-3-1. link insulator is protruding,

3-3-2. screw rod, the 3-3-3. sleeve, 3-4. moved end outlet seat,

3-5. the quiet line seat that brings out, No. 4.3 inner cone gang socket, 5. cable, 6. cable vault,

7.2 number inner cone gang socket, 8. cabinet shell, 9. gas tank unit,

10. vacuum circuit breaker operating mechanism, 11. three-station operating mechanisms, 12. low-pressure chambers,

13. main bus bar inner cone sleeve pipe, 13-1. main bus bar inner cone sleeve pipe arc groove,

13-2. main bus bar inner cone sleeve pipe circular arc boss, in the 13-3. main bus bar inner cone sleeve pipe protrusion arc conical surface, 14. main bus bars, 15. shading rings, 16. pressure relief devices, mechanism chambers 17..

Embodiment

The embodiment of the utility model is provided below in conjunction with accompanying drawing.

Shown in accompanying drawing; The utility model comprises cabinet housing 8, be contained in gas tank unit 9, low-pressure chamber 12, cable vault 6 in the cabinet housing 8, said gas tank unit 9 be one by the non-magnetic rustproof steel plate through laser cutting and the rectangular box body that is welded, on the left shrouding of gas tank unit 9 with each is being connected with 3 main bus bar inner cone sleeve pipes 13 with bolt on the right shrouding; The insulator of described main bus bar inner cone sleeve pipe 13 and the groove at HV Terminal junction surface are the circular arc mouth; Form a main bus bar inner cone sleeve pipe arc groove 13-1, the outer surface of insulator is protrusion arc conical surface 13-3, and arc transition is adopted on the last round platform of insulator and the protrusion arc cone of insulator surface; Form a main bus bar inner cone sleeve pipe circular arc boss 13-2; Above-mentioned design optimization the Electric Field Distribution state of main bus bar inner cone sleeve pipe 13, improved the puncture voltage level of main bus bar inner cone sleeve pipe 13, three-station 2 also is installed in gas tank unit 9; Be connected through branch bus 1 between main bus bar inner cone sleeve pipe 13 and the three-station 2; Be connected with shading ring 15 in three-station 2 and branch bus 1 junction with bolt, said shading ring 15 surperficial circular arcs are smooth, make that Electric Field Distribution is even on every side; Avoided because the unbalanced discharge that causes of Electric Field Distribution; Corona, discharge, flashover phenomenon can not appear in use in Cubicle Gas-Insulated Switchgear, on the preceding shrouding of gas tank unit 9, connect 3 poles 3 with bolt, and said pole 3 comprises pole shell 3-1, vacuum interrupter 3-2, link insulator 3-3 and moved end outlet seat 3-4 and the quiet line seat 3-5 that brings out; Link insulator 3-3 is installed in the inner moved end of pole shell 3-1; Said pole shell 3-1 seals the epoxy package that pours into admittedly through automatic pressure gelation process, and this epoxy package is enclosed in vacuum interrupter 3-2 and moved end outlet seat 3-4 and the quiet line seat 3-5 that brings out together admittedly, has so not only dwindled the size of vacuum interrupter 3-2; And do not receive the influence of extraneous dust and moisture fully; Improved weatherability, and this epoxy package both can be used as the main insulation of primary circuit, can be used as the mechanical support of primary circuit again; The insulator outside surface of said link insulator 3-3 is protruding curved surfaces 3-3-1; Its screw rod 3-3-2 presses the high-pressure side of annotating at insulator as inserts; Its sleeve 3-3-3 press to annotate the low-pressure end at insulator as inserts, and adds silicon powder filler wadding warp automatic pressure gelation process with epoxy resin and be cured as integrative-structure; In the mechanism chamber 17 of 9 front sides, gas tank unit, be connected with and possess simultaneously manually and the electric operating function is used to operate the vacuum circuit breaker operating mechanism 10 of pole 3 and manually reaches electric operating function three-station operating mechanism 11 with possessing simultaneously through bolt; Charged pressure is the clean dried compressed air of 0.13MPa in gas tank unit 9; Vacuum circuit breaker operating mechanism 10 place's joint faces adopt airtight welding sylphon seal on gas tank unit 9; Three-station operating mechanism 11 places joint faces adopt the seal with elastometic washer of O type on gas tank unit 9, on gas tank unit 9 lower side panels with bolt be connected with 6 No. 3 inner

cone gang sockets

4 and 7, No. 3 inner cone gang socket 4 of 3 No. 2 inner cone gang socket can parallelly connected socket cable chamber 6 in many cables 5; No. 2 inner cone gang socket can connect voltage transformer or lightning arrester; Current transformer can be sleeved on the cable, and with the switchgear frame fixation, be provided with the pressure relief device 16 that rupture pressure disc is housed on 9 tops, gas tank unit; When gas tank unit 9 air pressure inside raise above 0.3MPa; Pressure relief device 16 will be opened automatically, discharges gas tank unit 9 internal pressures and drains gas tank unit 9 internal gas, to guarantee operating personnel and safety of products; Said low-pressure chamber 12 is positioned at top, whole switchgear front side; Be the installing space of the control instrument of switchgear, said gas tank housing, low-pressure chamber housing, and the door of low-pressure chamber, mechanism chamber and each compartment of toolroom is by the regulation effective grounding.

Said gas tank unit 9 constitutes separate functional unit separately with mechanism chamber 17 and low-pressure chamber 12, cable vault 6 and cabinet shell 8, all can be used as a separate modular manufacturing, only needs to connect with regard to one-tenth switchgear capable of being combined with bolt.Pole 3 is to close to close, cut-off the operating current in loop or the functional unit of overload current; Connect, isolate major loop or with loop ground connection through three-station operating mechanism 11; Main bus bar 14 is used for connecting major loop, and cable 5 will go out line current and cause next stage controller switching equipment or user.

Claims

1. dry air insulated metal sealing switch equipment; Comprise gas tank unit (9), low-pressure chamber (12), mechanism chamber (17) and cable vault (6); Three-station (2), pole (3) in the gas tank unit (9); No. 3 inner cone gang sockets (4) and No. 2 inner cone gang sockets (7); On the left shrouding of gas tank unit (9) with right shrouding on the main bus bar inner cone sleeve pipe (13) that is connected; Be connected through branch bus (1) between main bus bar inner cone sleeve pipe (13) and the three-station (2), it is characterized in that, the smooth shading ring of surperficial circular arc (15) is installed at said three-station (2) and branch bus (1) junction; Said pole (3) comprises pole shell (3-1), vacuum interrupter (3-2), link insulator (3-3) and moved end outlet seat (3-4) and the quiet line seat (3-5) that brings out; Link insulator (3-3) is installed in the inner moved end of pole shell (3-1), and said pole shell (3-1) is to seal the epoxy package that pours into admittedly through automatic pressure gelation process, and this epoxy package is enclosed in vacuum interrupter (3-2) and moved end outlet seat (3-4) and the quiet line seat (3-5) that brings out together admittedly.

2. according to the said dry air insulated metal of claim 1 sealing switch equipment; It is characterized in that; The insulator of described main bus bar inner cone sleeve pipe (13) and the groove at HV Terminal junction surface are the circular arc mouth, form an arc groove (13-1), and arc transition is adopted on the last round platform of insulator and the cone of insulator surface; Form a circular arc boss (13-2), the outer surface of insulator is the protrusion arc conical surface (13-3).

3. according to the said dry air insulated metal of claim 1 sealing switch equipment; It is characterized in that; The insulator outside surface of said link insulator (3-3) is protruding curved surfaces (3-3-1); Its screw rod (3-3-2) is pressed the high-pressure side of annotating at insulator as inserts, and its sleeve (3-3-3) is pressed the low-pressure end of annotating at insulator as inserts.