CN202352412U

CN202352412U - Fully insulating tube bus

Info

Publication number: CN202352412U
Application number: CN2011205173117U
Authority: CN
Inventors: 蒋文功; 周忠
Original assignee: JIANGSU WETOWN ELECTRICITY SET CO Ltd
Current assignee: Jiangsu Witten Electric Group Ltd By Share Ltd; Wetown Electric Group Co Ltd
Priority date: 2011-12-13
Filing date: 2011-12-13
Publication date: 2012-07-25
Anticipated expiration: 2021-12-13

Abstract

The utility model discloses a fully insulating tube bus. A conductor shielding layer is coated on the surface of a tubular conductor; an insulating material is coated between the conductor shielding layer and an insulating shielding layer; a capacitive screen is embedded inside the insulating layer so as to realize grade insulation; the insulating shielding layer adopts a semi-conductive material for shielding; a coated copper strip or aluminum foil serves as a metal shielding layer; and the metal shielding layer is protected. The grade insulation mode mainly has the following advantages: 1, moisture is prevented from entering the interior of the insulating layer and further reducing the insulating strength; 2, partial electromagnetic field is shielded so as to reduce the circuit loss; 3, the material cost is reduced; 4, a material utilization factor is improved; and 5, electric field distribution is improved so as to improve the insulating performance. By utilizing the bus product, overhead and underground installation can be realized, and the application range is wide; the production and manufacturing cost can be effectively reduced, and the capital investment of an equipment purchaser is reduced.

Description

All insulation pipe bus

Technical field

This utility model relates to a kind of electric power system median generatrix, and particularly a kind of full-shield mix insulation protection contact tube bus belongs to equipment for power transmission and distribution.

Background technology

Connection in the transformer station of electric power system, the power distribution station between step down side to switchgear house, switchgear house to the switchgear house is to connect through bus, so the performance of bus insulation structure is determining bus performance of products and fail safe.

At present, in the change of electric power system, power distribution station, the used bus of main transformer low-pressure side is main with rectangular conductor mainly.The skin effect coefficient of single rectangular conductor is less, and supplementary load loss are low, but ampacity is limited, therefore, is applicable to that generally electric current is the loop use below the 2000A; Need adopt the multi-slice rectangle conductor parallel way to improve ampacity for satisfying the ampacity requirement, because multi-disc conductor skin effect coefficient big than monolithic conductor, so supplementary load loss increase.Therefore ampacity is not counted increase and is formed doubly and increase along with conductor piece, and especially every when above above three mutually, the skin effect coefficient of conductor enlarges markedly.Conductor should be selected the tubular conductor of the low moulding of skin effect coefficient in practical engineering application.

For solving the heating that inductive loop causes in the alternating intense magnetic field and preventing that the person from touching charged bus and metal object is fallen problems such as producing phase fault on the bus, the conductor insulation problem just becomes a problem that must solve.Conductive surface insulate and shielding processing can overcome the above problems managing; But existing insulated tube bus insulation is handled mostly to hold teflon oriented film as main insulation; And in actual engineering, be applied; Yet this kind mode insulating material cost is high, and is high to the transmission facility input cost.

Summary of the invention

Goal of the invention: the purpose of the utility model provides a kind of good insulation preformance, all insulation pipe bus that cost is low, and this all insulation pipe bus can be maked somebody a mere figurehead installation, can be embedded in underground and cable trough again, has wide range of applications.

Technical scheme: a kind of all insulation pipe bus, comprise the conductor shield that holds tubular conductor successively, hybrid packet around insulating barrier, insulation screen, metal screen layer and protective jacket, said metal screen layer is drawn earth lead.

Said hybrid packet comprises polyester film, capacitance plate and the polytetrafluoroethylene film of dipping silicon gel around insulating barrier; Polyester film and capacitance plate twine at interval; Twine at least one layer of the number of plies, the polyester film and the capacitance plate number of plies equate that outermost layer twines the polytetrafluoroethylene film as insulating protection.

Said insulation screen comprises the heat-shrinkable T bush and the semiconductive material layer that holds heat-shrinkable T bush as insulating protection.

Said protective jacket bus inner surfaces protect layer and bus protection layer.

Beneficial effect: the utility model all insulation pipe bus is at tubular conductive surface coating conductor screen; Coated insulation material and be bumped into capacitance plate in insulating barrier inside and realize the sublevel insulation between conductor shield and the insulation screen; Insulation screen adopts semiconductive material as shielding; Hold copper strips or aluminium foil as metal screen layer, and metal screen layer is protected processing; This kind sublevel insulation mode mainly contains following some advantage: prevent that 1, moisture from getting into the inner dielectric strength that reduces of insulating barrier; 2, the masked segment electromagnetic field reduces line loss; 3, reduce material cost; 4, improve the material use factor; 5, improve Electric Field Distribution and improve insulation property.This kind bus product can be realized built on stilts and underground installation, has wide range of applications; Can effectively reduce manufacturing cost, reduce the fund input of equipment purchase side.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model broken section enlarged drawing.

Embodiment

Below in conjunction with accompanying drawing the present invention is described further.

As shown in the figure, a kind of all insulation pipe bus comprises the conductor shield 2 that holds tubular conductor 1 successively, hybrid packet around insulating barrier 3, insulation screen 4, metal screen layer 5 and protective jacket 6, and said metal screen layer 5 is drawn earth lead 7.Said hybrid packet comprises polyester film 31, capacitance plate 32 and the polytetrafluoroethylene film 33 of dipping silicon gel around insulating barrier 3; Polyester film 31 twines with capacitance plate 32 at interval; Twine three layers; Polyester film 31 equates that with capacitance plate 32 numbers of plies outermost layer twines the polytetrafluoroethylene film 33 as insulating protection.Said insulation screen 4 comprises the heat-shrinkable T bush 41 and the semiconductive material layer 42 that holds heat-shrinkable T bush 41 as insulating protection.Said protective jacket 6 bus inner surfaces protect layers 61 and bus protection layer 62.

The all insulation pipe bus of the utility model contains tubular conductor 1, and tubular conductor 1 both can be a copper pipe, also can be aluminum pipe or the tubular conductor of other alloys.Tubular conductor 1 surface coats one deck conductor shield 2; This conductor shield 2 is to twine with the banded material of semiconductive to make; The hybrid packet that is polyester film 31 and polytetrafluoroethylene film 33 between conductor shield 2 and insulation screen 4 is around insulating barrier 3; Hybrid packet is after insulating barrier 3 is to twine with the total length integral body of the tubular conductor 1 in the polyester film that floods the silicon gel 31 edges earlier, and the polytetrafluoroethylene film 33 that holds dipping silicon gel is done the reinforcement processing of insulating, and reusable heat Heat-Shrinkable Tubings 41 is done insulation protection processing; And hold semiconductive material layer 42 as insulation screen 7, make whole insulation system.Holding copper strips or aluminium foil at the integral insulation body structure surface makes metal screen layer 5 and makes last shielding processing; Make bus inner surfaces protect layer 61 and bus protection layer 62 at last, and before manufacturing lining overcoat 61 and bus protection layer 62, draw earth lead 7 from metal screen layer 5.

The mix insulation layer is after flooding the silicon gels with polyester film 31 and polytetrafluoroethylene film 33; The total length of tubular conductor 1 coats in conductor shield 2 outers; Its method is when twining with polyester film 31, to put into the capacitance plate 32 (aluminium foil) of conduction, and polyester film 31 twines capacitance plate 32 after twining certain thickness, and circulation is twined successively; And the insulation number of plies between capacitance plate 32 and the capacitance plate 32 is consistent, twine polytetrafluoroethylene film 33 again and do the insulation protective treatment.

The mix insulation layer is covered to complete; Adding cover one deck heat-shrinkable T bush 41 in hybrid packet around insulating barrier 3 handles as insulating protection; Hold on heat-shrinkable T bush 41 surfaces or add cover semiconductive material layer 42 as insulation screen 4, integral body is processed in combination, holds copper strips or aluminium foil is made metal screen layer 5 last shielding processing at the integral insulation body structure surface; Make bus inner surfaces protect layer 61 and bus protection layer 62 at last, and draw earth lead 7.

Claims

1. all insulation pipe bus; It is characterized in that: comprise the conductor shield (2) that holds tubular conductor (1) successively, hybrid packet around insulating barrier (3), insulation screen (4), metal screen layer (5) and protective jacket (6), said metal screen layer (5) is drawn earth lead (7).

2. all insulation pipe bus according to claim 1; It is characterized in that: said hybrid packet comprises polyester film (31), capacitance plate (32) and the polytetrafluoroethylene film (33) of dipping silicon gel around insulating barrier (3); Polyester film (31) and capacitance plate (32) twine at interval; Twine at least one layer of the number of plies, the polyester film (31) and capacitance plate (32) number of plies equate that outermost layer twines the polytetrafluoroethylene film (33) as insulating protection.

3. all insulation pipe bus according to claim 1 is characterized in that: said insulation screen (4) comprises the heat-shrinkable T bush (41) as insulating protection and holds the semiconductive material layer (42) of heat-shrinkable T bush (41).

4. all insulation pipe bus according to claim 1 is characterized in that: said protective jacket (6) bus inner surfaces protect layer (61) and bus protection layer (62).