CN2684424Y

CN2684424Y - Box type gas insulated metal sealing switchgear

Info

Publication number: CN2684424Y
Application number: CN 200420038058
Authority: CN
Inventors: 董万峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-01-18
Filing date: 2004-01-18
Publication date: 2005-03-09
Anticipated expiration: 2014-01-18

Abstract

The utility model belongs to a box type gas insulated metal sealing switchgear of three-phase alternating current of 50Hz, adapting to the control and the protection of an electric power transmission and distribution system. The utility model is primarily composed of functional units of a vacuum breaker, an insulated earth switch, a main bus, a bus connector, a cable in-out line socket, etc. The three-phase common box structure is provided with elements of the vacuum breaker, the insulated earth switch, and the main bus; three phases of A, B, and C of these elements are arranged in a fore-and-aft type like the Chinese character 'yi'. The box type gas insulated metal sealing switchgear has the advantages of simple and compact structure, stable performance, beautiful appearance, convenient equipment management and maintenance, small width of a cabinet body, and land resource saving, etc. Compared with the same kind of traditional switchgear, the box type gas insulated metal sealing switchgear can economize floor space by at least 65 percent; compared with inflating cabinets of foreign companies at present, the box type gas insulated metal sealing switchgear can economize floor space by at least 30 percent. The major technical parameter of the utility model exceeds levels of an open type metal sealing switchgear and a conventional gas insulated metal sealing switchgear, and the box type gas insulated metal sealing switchgear is an ideal product which can replace traditional electric power transmission and distribution station equipment.

Description

The box type gas insulating metal enclosed switchgear

(1) technical field:

The utility model belongs to the box type gas insulating metal enclosed switchgear.

(2) technical background:

The power industry high speed development drives the common progress of high voltage electric equipment manufacturing simultaneously.Medium-voltage distribution equipment has a large capacity and a wide range especially, is widely used in industrial and mining enterprises, power plant, urban and rural power grids etc., and its security reliability directly affects the safety of national economy and people's lives and properties.

Application feature from domestic switchgear, mainly based on air-insulated open type switchgear, but the insulation margin alternate and over the ground of this series products is little, can not meet the operating condition requirement, especially in filth, humidity, condensation, and place such as power plant, the insulation fault rate is high especially, and uses limited in the high altitude localities.Therefore manage to strengthen the insulation level of existing switchgear and improve work such as insulating part material extremely urgent.I think that the dielectric that only changes is only the effective way that improves the switchgear insulation level; The size of switch is dwindled.Therefore adopt the box type gas insulating metal enclosed switchgear of sulfur hexafluoride gas-insulating to arise at the historic moment.This equipment is subjected to the ambient atmosphere condition effect hardly.Therefore under the condition of plateau and pollution severity, more can bring into play its advantage; And the set-up time is short, floor space is little, maintenance period is long, maintenance cost is low, utilance is high, the person and device security height, power supply are reliable, be widely used in the narrow and small place of humidity, condensation, filth, chemical gas burn into, densely populated urban district, skyscraper, places such as subway and underground substation.

(3) summary of the invention:

The utility model belongs to the box type gas insulating metal enclosed switchgear, mainly form by function element such as circuit breaker, isolation-earthed switch, main bus bar, bus coupling, cable turnover line sockets, and each function element is sealed in the housing that is filled with sulfur hexafluoride gas, increase insulation margin greatly, and be not subjected to the influence of external environment.

The three-phase of all simultaneously function element is furnished with-and other is in the box type gas insulating metal enclosed switchgear of international renowned companies such as ABB, Siemens, Alstom, the relative cabinet front panel of A, B, C three-phase of elements such as circuit breaker, isolation-earthed switch, main bus bar, bus coupling, cable turnover line socket is the left, center, right structural configuration, but A, B, C three-phase, in-line was arranged before and after the front panel of cabinet was relatively; The insulated tension pole interlock of circuit breaker by two parallel connections, and moved end support switching mechanism by being fixed in arc control device and arc control device moved end the direction of motion.

Advantage of the present utility model: all high voltage devices all are enclosed in the housing that is filled with sulphur hexafluoride, are not subjected to the influence of external environment, and insulation is reliable, operation transmission efficiency height, and safe and reliable to operation, floor space is little.

In-line was arranged before and after the front panel of the A of each function element of the present utility model, B, each relative cabinet of C three-phase was, and three-phase operation is by insulated tension pole realization, and is rational in infrastructure, operation transmission efficiency height, and operation is reliable, the mechanical endurance that can improve circuit breaker greatly.And can significantly reduce the width of cabinet, floor space is 30% of a conventional air insulation switch cubicle of the same type, and 65% of inflation cabinet conventional of the same type has significantly reduced floor space.Adopting bus tie, be convenient to Installation and Debugging, is the desirable substitute products of traditional electrical power trans mission/distribution system equipment

(4) description of drawings:

The end view of Fig. 1, box type gas insulating metal enclosed switchgear.

1 is discharge channel among Fig. 1, the 2nd, the left fixed head of circuit breaker, the 3rd, vacuum interrupter, the 4th, insulated tension pole, the 5th, circuit breaker cradle, the 6th, busbar, the 7th, pull bar, the 8th, transmission main shaft, the 9th, connecting rod, the 10th, the mechanism of circuit breaker, the 11st, Pressure gauge, the 12nd, the mechanism of isolation earthing switch, the 13rd, the operation axis of isolation earthing switch (insulation), the 14th, insulator, the 15th, cable plug, the 16th, current transformer, the 17th, the cable fixed mount, the 18th, cabinet, the 19th, cable, the 20th, conductive support, the 21st, rupture pressure disc, the contact knife of 22 isolation-earthed switches, the 23rd, the pre-stage clip of the contact knife of isolation earthing switch, the 24th, the static contact seat of isolating switch, the 25th, the supporting bracket of circuit breaker Insulating frame

The front view of Fig. 2, box type gas insulating metal enclosed switchgear.

26 is supporting insulators among Fig. 2, the 27th, seal casinghousing, the 28th, busbar, the 29th, the connecting plate of insulated tension pole and arc control device moved end, the 30th, the compression spring of contact of breaker, the 31st, conduction is flexible coupling, the 32nd, the upper backup pad of circuit breaker, the 33rd, the lower supporting plate of circuit breaker, the 34th, the static contact seat of earthed switch, the 35th, the right fixed head of circuit breaker, the 36th, the arc-extinguishing chamber of circuit breaker guide post, the 37th, the arc-extinguishing chamber of circuit breaker fairlead, the 38th, insulated tension pole lead to pin, the 39th, the guide finger of arc-extinguishing chamber of circuit breaker moved end.

(5) most preferred embodiment of the present utility model:

Item 28 buses are supported by two item 26 insulators, and 26 supporting insulator can link to each other with an other cabinet with spline structure by bus tie, constitute main bus bar.28 buses 31 link to each other by being flexible coupling of item 6 busbars and circuit breaker.

The mechanism of item 10 circuit breakers is fixed on the preceding outer facade of 27 seal casinghousing, mechanism links to each other by 9 connecting rod, 8 power transmission shaft, 7 pull bar, 4 insulated tension pole, item 4 insulated tension poles are by 38 guide finger, link to each other with the connecting plate of arc control device moved end with item 29 insulated tension poles, link to each other with item 37 arc-extinguishing chamber of circuit breaker fairleads and item 36 guide posts by 39 guide fingers again, constitute the running part of vacuum circuit-breaker jointly with 5 circuit breaker cradles; Item 3 vacuum interrupters are connected with 32,33 upper and lower support plate, and are fixed on 2,35 fixed head, constitute the breaker body part.Item 30 springs are through on 36 guide post, and the contact precompression of vacuum circuit-breaker is provided.Item 35 right fixed heads, 2 a left fixed head are fixed on the preceding facade of 27 seal casinghousing.

The static contact seat of item 24 isolating switches is fixed on the quiet end of 3 vacuum interrupter, 14 insulators were fixed on 27 seal casinghousing following, item 20 conductive supports are fixed on 14 insulator, the contact knife of item 22 isolation-earthed switches is fixed on 20 conductive support by the operation axis of item 13 isolation earthing switch, item 23 touch springs provide precompression for the contact knife of item 22 isolation earthing switch, the static contact seat of item 34 earthed switches is fixed on the front of 27 seal casinghousing, the mechanism of item 12 isolation earthing switch directly links to each other with the operation axis of 13 isolation earthing switch, the common formation of above element three station isolation-earthed switches.

Item 15 cable plugs, 16 current transformers, 17 cable fixed mounts, 19 cables are the annex of box type gas insulating metal enclosed switchgear.

The utility model evidence, every technical parameter all can reach the specification requirement of power transmission and transformation line, and can improve the fail safe and the reliability of power supply, reasonable structural arrangement, transmission efficiency height greatly.Compare with conventional switch equipment of the same type and can save floor space more than 65%; Compare with present offshore company box type gas insulating metal enclosed switchgear of the same type (inflation cabinet), and save floor occupying area more than 30%.The utility model overall performance height, the application prospect of product is very wide.The utlity model has excellent comprehensive performances, will make positive contribution for the development of the electric utility of China.

Claims

1, a kind of box type gas insulating metal enclosed switchgear mainly is made up of function element such as vacuum circuit-breaker, isolation-earthed switch, main bus bar, bus coupling, cable turnover line sockets; It is characterized in that circuit breaker, isolation-earthed switch, cable turnover line socket, main bus bar A, B, C, three-phase, in-line was arranged before and after the front panel of cabinet was relatively, and was enclosed in the housing that is filled with sulfur hexafluoride gas.

2, a kind of box type gas insulating metal enclosed switchgear according to claim 1, A, the B, the C three-phase vacuum interrupter that it is characterized in that being enclosed in the circuit breaker in the sulfur hexafluoride gas are located on the outer mechanism of air chamber and are front and back in-line arrangement, A, B, C three-phase link to each other by two eradication edge pull bars in parallel, and the other end links to each other with mechanism by a metal connecting rod.

3, a kind of box type gas insulating metal enclosed switchgear according to claim 1, the insulated tension pole that it is characterized in that circuit breaker links to each other with a connecting plate by a pivot pin, link to each other with the guide post of arc-extinguishing chamber of circuit breaker by another pivot pin again, pivot pin and connecting plate are fixed on the moved end support of arc control device.

4, a kind of box type gas insulating metal enclosed switchgear according to claim 1, A, the B, the C three-phase that it is characterized in that being enclosed in the isolation-earthed switch in the sulfur hexafluoride gas are located on the outer mechanism of air chamber and are front and back in-line arrangement, and the insulation main shaft passes the axis of rotation of A, B, C three-phase contact knife.

5, a kind of box type gas insulating metal enclosed switchgear according to claim 1, the lower end that it is characterized in that circuit breaker connects a fixed contact, with another winding ground contact and be installed in down main shaft and contact knife sheet formation isolation-earthed switch on the cable block, the moved end of circuit breaker upwards directly links to each other with the main bus bar of upper end.