CN2541936Y

CN2541936Y - Dry high voltaeg current transformer

Info

Publication number: CN2541936Y
Application number: CN02233067U
Authority: CN
Inventors: 张子鸾; 方静
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-23
Filing date: 2002-04-23
Publication date: 2003-03-26
Anticipated expiration: 2012-04-23

Abstract

The utility model discloses a dry-type high-tension current mutual-inductor, and comprises a primary winding conductor, capacitance major insulation, a glass-steel insulating cylinder, a silicon rubber umbrella skirt, macromolecule insulating packing, a end cap, a flange, a box, and a secondary winding and the like. The utility model is characterized in that the primary winding conductor in the U-shaped structure is sequentially sleeved at an electrician good conductor which is insulated with the primary winding conductor, the capacitance major insulation is formed by the alternation of solid composite material and a capacitance screen, and the high-tension glass-steel insulating cylinder bears the mechanical load of the mutual-inductor. The high-tension current mutual-inductor is the full dry-type insulation, and has the advantages of oil-free effect, non-gas, non-ceramic effect, and reliable safety.

Description

Dry Type High Tension Current Transformer

The utility model relates to a kind of high-tension current inductor, particularly adopts solid insulation, is used for the Dry Type High Tension Current Transformer of outdoor or indoor transformer station.

At present, for solving the seepage oil problem of 35kV and above filling type high-tension current inductor, the domestic Dry Type High Tension Current Transformer that solid insulation occurred adopting discloses this Dry Type High Tension Current Transformer such as CN236184Y that announces respectively on February 2nd, 2000 and on September 13rd, 2000 and the Chinese utility model patent specification of CN2396494Y.What this high-tension current inductor adopted is " U " font structure, and its major advantage is not have oil, no gas (SF ₆), no porcelain, volume is little, in light weight, pollution flashover voltage is high, be convenient to installation and maintenance, reliable.Yet, this current transformer cancelled traditional oil-filled mutual inductor rise along the face insulation with bear the insulator of mechanical load double action, and increased " the tubulose rigid backbone made from steel alloy or other non-magnet_conductible material " in the inside of its capacitor type main insulation, bear mechanical load with it.Reached dry insulation purpose although it is so, but because alloy pipe is positioned at main insulation, its external diameter is restricted; Simultaneously, from steel tube inner hole, also will pass one time winding, so thickness of steel pipe can not be too thick.Like this, the mechanical strength of alloy pipe (rigidity) is just relatively poor, thereby influences the ability of the whole tolerance of instrument transformer mechanical load.Come " fixedly secure the two ends of U-shaped dry-type high-voltage sleeve pipe " though designed " having certain dielectric strength and high mechanical properties " hookup in the patent specification of this current transformer, the mechanical property of instrument transformer integral body is still relatively poor.

The purpose of this utility model is to overcome the shortcoming of above prior art, a kind of Dry Type High Tension Current Transformer is provided, the mechanical load of this high-tension current inductor is sleeved on the outer high strength glass fiber reinforced plastic insulating cylinder of " U " shape capacitor type main insulation by two and bears, the advantage that had so both kept the dry insulation structure has solved the problem of existing dry type mutual inductor bad mechanical strength again.

For achieving the above object, the utility model Dry Type High Tension Current Transformer is curving " U " shape, the surperficial capacitor type main insulation of directly making on a winding conductor of smooth treatment, and capacitor type main insulation alternately is made of solid composite material and capacitance plate; These capacitance plates are made by metal forming or semiconductive film.The top of " U " shape capacitor type main insulation, its two arm is set with the high strength glass fiber reinforced plastic insulating cylinder that is bonded with the silicon rubber full skirt; Perfusion macromolecule insulation filler between glass fibre reinforced plastic insulating tube and the capacitor type main insulation.The upper end of glass fibre reinforced plastic insulating tube is by end cap and a winding conductor sealing and fixing, and its lower end is fixed on the casing by flange.The glass fibre reinforced plastic insulating tube can be the identical cylindrical shape of two ends diameter, also can be the toroidal that upper end diameter is little, lower end diameter is big.

Coated outside one deck outer jacket of the bottom of " U " shape capacitor type main insulation, outer jacket fixes on together with flange and glass fibre reinforced plastic insulating tube by sealing device.The secondary coil of the outer suit ribbon core of outer jacket, secondary coil can be fixed in the casing by the mode of bolt or resin-cast.The bottom of " U " shape structure can be fixed on the bottom of casing by the mode of bolt or resin-cast.

A winding conductor can be a uniconductor, and adopt good electrician's copper rod (pipe) or the electrician's aluminium bar (pipe) of electric conductivity: one time winding conductor can be many conductors also, and being suitable for a winding is the series-parallel situation of multiturn.When one time winding was many conductors, these conductors were for being sleeved on together electrician's good conductor also insulated from each other successively, and as copper pipe (or aluminum pipe) etc., the cross sectional shape of the interior conductor is not limit.These are sleeved on together and after a winding sub-conductor of mutually insulated passes from end cap successively, can be processed into step-likely, make things convenient for connection in series-parallel to connect.

Adopt said structure, because the mechanical load of instrument transformer is born by the relative thicker high strength glass fiber reinforced plastic insulating cylinder of diameter, make this pattern Dry Type High Tension Current Transformer have than existing dry type mutual inductor better mechanical strength, therefore can not re-use the rigid backbone that alloy pipe is used as load, also not need the high strength hookup to connect the end in order to strengthen the mechanical property of instrument transformer.So both keep advantages such as dry insulation structural oilless, no gas, no porcelain, ne-leakage, solved the problem of the whole mechanics poor-performing of existing Dry Type High Tension Current Transformer again.

As further improvement of the utility model, the lower end and the secondary winding of " U " shape structure fixedly secure in casing by the way of resin-cast together.

From the above, the utility model Dry Type High Tension Current Transformer is made up of winding conductor, capacitor type main insulation, glass fibre reinforced plastic insulating tube, silicon rubber full skirt, macromolecule insulation filler, end cap, flange, casing, secondary coil, outer jacket etc.Be characterized in: a winding conductor that curves " U " shape is made up of the good electrician's conductor of multilayer insulated from each other that is sleeved on successively together, the outer directly parcel of a winding conductor capacitor type main insulation, the outside suit on the top of capacitor type main insulation (that is: bearing along the part of face insulation) is stained with the glass fibre reinforced plastic insulating tube of silicon rubber full skirt, the upper end of glass fibre reinforced plastic insulating tube is by end cap and a winding conductor sealing and fixing, filled high polymer insulation filler between capacitor type main insulation and the glass fibre reinforced plastic insulating tube, the lower end of glass fibre reinforced plastic insulating tube is fixed on the casing by flange, secondary coil is sleeved on the outside of capacitor type main insulation, and secondary coil places in the casing.

In sum, advantage of the present utility model: the mechanical load that is instrument transformer is born by the relative thicker high strength glass fiber reinforced plastic insulating cylinder of diameter, solved the problem of the whole mechanics poor-performing of existing Dry Type High Tension Current Transformer, cancelled rigid backbone and high strength hookup that steel alloy or other non-magnet_conductible material are made simultaneously, made more advantages of simple of instrument transformer structure.

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

Accompanying drawing 1 is the utility model Dry Type High Tension Current Transformer structural representation.

Accompanying drawing 2 is a winding sub-conductor end construction schematic diagram.

The utility model Dry Type High Tension Current Transformer (as shown in Figure 1) is made up of winding conductor 1, capacitor type main insulation 2, glass fibre reinforced plastic insulating tube 3, silicon rubber full skirt 4, macromolecule insulation filler 5, end cap 6, flange 7, casing 8, secondary coil 9, outer jacket 10 etc.A winding conductor 1 can be a uniconductor, adopts good electrician's copper rod (pipe) or the electrician's aluminium bar (pipe) of electric conductivity.One time winding conductor 1 can be many conductors also, is applicable to that a winding is the series-parallel situation of multiturn.When one time winding was many conductors, these conductors (being called sub-conductor) were for being sleeved on together electrician's good conductor also insulated from each other successively, and as copper pipe (or aluminum pipe) etc., the cross section of the interior sub-conductor is not limit.These are sleeved on successively and are sub-conductor insulating barrier 12 (as shown in Figure 2) between together the winding sub-conductor 11, and they form winding conductor 1 jointly one time.After one time winding conductor 1 passes from end cap 6, can be processed into step-like (as shown in Figure 2), connect with the connection in series-parallel between the sub-conductor at convenient " U " shape structure two ends.

Curve " U " shape, the surperficial capacitor type main insulation 2 of on a winding conductor 1 of smooth treatment, directly making.Capacitor type main insulation 2 alternately is made of solid composite material and capacitance plate; These capacitance plates are made by metal forming or semiconductive film.The top of " U " shape capacitor type main insulation 2, its two arm is set with the high strength glass fiber reinforced plastic insulating cylinder 3 that is bonded with silicon rubber full skirt 4; Perfusion macromolecule insulation filler 5 between glass fibre reinforced plastic insulating tube 3 and the capacitor type main insulation 2.The upper end of glass fibre reinforced plastic insulating tube 3 is by end cap 6 and winding conductor 1 sealing and fixing, and its lower end is fixed on the casing 8 by flange 7.

Coated outside one deck outer jacket 10 of the bottom of " U " shape capacitor type main insulation 2, outer jacket 10 is fixed together by sealing device and flange 7 and glass fibre reinforced plastic insulating tube 3.The secondary coil 9 of outer jacket 10 outer suit ribbon cores, secondary coil 9 can be fixed in the casing 8 by the mode of bolt or resin-cast.The bottom of " U " shape structure can be fixed on the bottom of casing 8 by the mode of bolt or resin-cast.

Claims

1. Dry Type High Tension Current Transformer, it is by a winding conductor 1, capacitor type main insulation 2, glass fibre reinforced plastic insulating tube 3, silicon rubber full skirt 4, macromolecule insulation filler 5, end cap 6, flange 7, casing 8, secondary coil 9, outer jacket 10 compositions such as grade, it is characterized in that: a winding conductor 1 outer directly parcel capacitor type main insulation 2 that curves " U " shape, a described winding conductor 1 is made up of the multiple layer of copper insulated from each other or the aluminium conductor that are sleeved on successively together, the outside suit glass fibre reinforced plastic insulating tube 3 of part outside the casing 8 of described capacitor type main insulation 2, the upper end of described glass fibre reinforced plastic insulating tube 3 is by end cap 6 and winding conductor 1 sealing and fixing, filled high polymer insulation filler 5 between described capacitor type main insulation 2 and the glass fibre reinforced plastic insulating tube 3, described glass fibre reinforced plastic insulating tube 3 outside bonding silicone rubber full skirts 4, described glass fibre reinforced plastic insulating tube 3 is fixed on the casing 8 by flange 7, secondary coil 9 is sleeved on the outside of capacitor type main insulation 2, and described secondary coil 9 places in the casing 8.

2. Dry Type High Tension Current Transformer as claimed in claim 1 is characterized in that: secondary winding 9 is fixed in the casing 8 with resin-cast with the lower end that is surrounded by " U " shape capacitor type main insulation 2 of outer jacket 10.