CN2417545Y

CN2417545Y - Simple type transformer sleeve

Info

Publication number: CN2417545Y
Application number: CN 00208668
Authority: CN
Inventors: 刘刚; 秦伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-30
Filing date: 2000-04-30
Publication date: 2001-01-31
Anticipated expiration: 2010-04-30

Abstract

The utility model relates to a simple type transformer sleeve which has the technical key points that insulators are composed of the press of moulding plastics, and sealing positions all adopt axial wedge shape sealing rings or combination heteromorphic sealing rings so as to reach a sealing effect. The sealing rings are all in a sealed state, and the sealing rings don't have bareness in the air. The sleeve has simple structure, the sleeve can be colored according to rules, and has good versatility with a traditional structure. The utility model is especially suitable for the matching of products of transformer classes, mutual inductor classes and capacitor classes.

Description

The plain type bushing shell for transformer

The utility model relates to a kind of transformer ' s type product plain type bushing shell for transformer, is the improvement to present bushing shell for transformer.

In the market Chang Yong bushing shell for transformer structure as shown in Figure 6, it is made up of porcelain insulator 3, conducting rod 1, cushion rubber 17, porcelain trim ring 19, securing member 8 etc., this is simple in structure, cost is low, continues to use always.But its not anti-mechanical shock, frangible, hermetically-sealed construction is unreasonable, and

cushion rubber

17,18 easily chaps, and influenced by case lid place machining accuracy, causes oil leakage phenomenon to happen occasionally.

(notification number is CN2311844Y) discloses a kind of compound inslation bushing shell for transformer as shown in Figure 5 on Chinese patent, and it adopts the composite material cast to form.The inside has been adopted multi-layer sealed, adds encapsulation, and insulator 3 is also adopted the moulding plastics manufacturing, and this structure is too complicated, and cost is too high, be difficult to promote, and no recessed annular die cavity 6 under the full skirt, reduced the surface withstand voltage performance.Multiple combination of materials of while, because the coefficient of expansion is inconsistent uncompensated again, working long hours to cause seepage.

The utility model purpose is to avoid above-mentioned weak point and plain type bushing shell for transformer that a kind of features simple structure, dependable performance are provided.

The purpose of this utility model is realized by following scheme: have insulator 3, be coated with conducting rod 1 in the top, and it is fixing with nut 15 and packing ring 14, the bottom is fixed on the transformer case lid 9 by ring flange 10 and bolt 8, its difference is insulator 3, upper and lower sealing position axial seal is provided with wedge-type seal circle 2 and 13, and insulator 3 inboards and the ring flange 10 inboard corresponding configuration that go up have the conical surface 4 and 11.

In the such scheme, insulator 3 usefulness moulding compression molding materials constitute, and inboard, its underpart is provided with cage ring 12.

According to such scheme, primary structure of the present utility model is characterised in that insulator 3 upper and lower sealing position axial seals are provided with wedge-type seal circle 2 and 13, and insulator 3 inboards and the ring flange 10 inboard corresponding configuration that go up have the conical surface 4 and 11.

When mounted, upper sealing gasket 2 by the male cone (strobilus masculinus) of sealing ring 2 and the wedging action of inner conical surface 4, is guaranteed non-leakage under the pressure of packing ring 14 and nut 15.The secondary seal effect of sealing ring 4 top convex surfaces 16 makes sealing more reliable simultaneously.The lower seal place is by the wedging action of wedge-type seal circle 13 and inner conical surface 11,9 of ring flange 10 and transformer case lids pass through welding, inner conical surface 11 obtains by machine work, surface quality is better than former transformer case lid and guarantees the non-leakage oil in bottom, and two sealing rings 2 and 13 all do not contact with atmosphere, and the life-span is long.

In the such scheme, insulator 3 usefulness moulding compression molding materials are made, and umbrella 5 has annular cavity 6, helps improving sealing site surface quality and appearance creepage distance, and particularly damp proof creepage performance improves flashover voltage.Insulator 3 bottoms are provided with loop isolation stall 12, make with ambroin, 9 insulation levels of lead-in wire 7 and case lid are improved, when especially gas is arranged at full-sealed transformer top.Can cancel 12 when using for oil-filled type or low pressure outlet terminal.This sleeve pipe links to each other insulator 3 by securing member 8 with ring flange 10.Insulator can be made into various corresponding color, and overall structure can be made and wear cable formula or wiring screw formula, wears the cable formula generally as bushing, and the wiring screw formula generally is used for big current mode.

The utility model features simple structure is made easily, and is easy to install, is widely used on range transformer series products (transformer, instrument transformer, the capacitor) sleeve pipe.

Below in conjunction with accompanying drawing an embodiment of the present utility model is described.

Fig. 1 wears cable formula sleeve pipe view for the utility model.

Fig. 2 is sequence number 3 front views among Fig. 1.

Fig. 3 is sequence number 2 front views among Fig. 1.

Fig. 4 is sequence number 13 front views among Fig. 1.

Embodiment of the present utility model such as Fig. 1-4 shows, is illustrated as a transformer and wears the cable bushing with simple and easy combined type.Has umbellate form insulator 5, in be coated with the conducting rod 1 of band lead-in wire 7, realizing sealing under the pressure of packing ring 14 and nut 15 by combination fixing ring 3, be welded with the ring flange 10 of band inner conical face 11 on the transformer case lid 9, logical then sealing ring 13 is realized lower seal, sleeve pipe is fixed on the transformer by securing member 8, for improving insulation level between lead-in wire and case lid, be provided with cage ring 12 in the bottom, when especially gas being arranged the multilayer cage ring can be set for the full-sealed transformer inside pipe casing, the ageing-resistant plastics of insulator 3 usefulness are made, and can make by the power department specified color, and are eye-catching, attractive in appearance, be difficult for broken.

This structural change sealing principle, sealing ring does not expose, each molded part machining accuracy is also high, easily guarantees decrement, improves the sealing ring life-span.Sleeve pipe overall dimension on case lid is littler, and is both artistic and practical.And organization of production is easy, and cost is low, and simultaneously because similar with traditional structure, to install and use custom consistent with transformer factory, can obtain fast popularization fast.

Claims

1, a kind of plain type bushing shell for transformer, has insulator 3, be coated with conducting rod 1 fully in the top, and it is fixing with nut 15 and packing ring 14, the bottom is fixed on the transformer case lid 9 by ring flange 10 and bolt 8, it is characterized in that insulator 3 upper and lower sealing position axial seals are provided with wedge-type seal circle 2 and 13, insulator 3 inboards and the ring flange 10 inboard corresponding configuration that go up have the conical surface 4 and 11.

2, by the described plain type bushing shell for transformer of claim 1, it is characterized in that insulator constitutes with the moulding compression molding material, insulator 3 is provided with cage ring 12 with lower inside.