CN2264955Y

CN2264955Y - 35KV oiled paper capacity casing

Info

Publication number: CN2264955Y
Application number: CN 96238738
Authority: CN
Inventors: 张凤祥; 罗校军
Original assignee: No1 Branch Of Shenyang Transformer Factory
Current assignee: No1 Branch Of Shenyang Transformer Factory
Priority date: 1996-10-15
Filing date: 1996-10-15
Publication date: 1997-10-15
Anticipated expiration: 2006-10-15

Abstract

The utility model belongs to a transformer unit, particularly a 35 kV oiled paper capacity casing tube used for leading a conductor through an outer shell. The utility model is mainly suitable for out leading outlet wires of 35-40 kV transformers with the current of 1000-4000A. The utility model mainly solves the technical problems of low reliability, difficult maintenance, etc. in the prior art. The utility model is characterized in that an oil conservator with an oil level gauge is arranged on an upper ceramic casing. The whole body of the casing tube is tightly pressed and adopts a disc spring structure. A lower wiring terminal and a conductive rod are an integral body. Compared with the prior art, the utility model has the advantages of high reliability, convenient maintenance, small installation size, etc.

Description

A kind of 35kV oilpaper capacitance graded bushing

The utility model belongs to transformer part or claims assembly, is that conductor is drawn a kind of 35kV oilpaper capacitance graded bushing that passes shell, mainly is applicable to drawing of transformer 35～40kV, electric current 1000～4000A outlet.

At present, the typical structure that is used for the oilpaper capacitance graded bushing that 35～40kV, electric current 1000～3150A outlet draw is the product of ABB AB as shown in Figure 1.It is made up of upper connecting terminal, rain cover, air relief cock, conducting rod, capacitor core, last insulator, mounting flange, measurement terminal, following insulator, lower connecting terminal and insulation wet goods.Its weak point is: 1. because this structure does not have oil level mark, when the certain space that leaves by last insulator top and air relief cock are adjusted pasta, can't see outside, also can't measure during operation, therefore, in case when pasta is lower than the capacitor core insulation, just produce discharge fault, transformer can not be moved; 2. bobbin seal is to adopt conducting rod to give the stress tension, and manufacturability is comparatively strict, and the maintenance difficulty is actually the life goods that can not repair at the scene; 3. lower connecting terminal is assemblied in the lower end of conducting rod, and not only complex structure, and size is also big.

The purpose of this utility model is to overcome the weak point in the above-mentioned prior art, and reliability height, easy to maintenance, a kind of 35kV oilpaper capacitance graded bushing that installation dimension is little are provided.

The purpose of this utility model can reach by following technical measures: it comprises upper connecting terminal, rain cover, air relief cock, conducting rod, capacitor core, goes up insulator, mounting flange, measurement terminal, following insulator and insulation wet goods, its special character: the conservator that the band oil level indicator is housed on last insulator; The integral body of sleeve pipe compresses to adopt and places the conservator inner bottom part and to be enclosed within the whole holddown spring of sleeve pipe on the conducting rod; Directly forging and pressing have the lower connecting terminal that becomes one with conducting rod in the conducting rod lower end.

Below in conjunction with drawings and Examples the utility model is described in further detail:

Fig. 1 is existing 35kV oilpaper capacitance graded bushing structural representation;

Fig. 2 is a structural representation of the present utility model:

Fig. 3 is conservator of the present utility model and compressing structure schematic diagram;

Fig. 4 has the conducting rod structural representation of lower connecting terminal for the utility model;

Fig. 5 is the end view of lower connecting terminal part among Fig. 4.

With reference to Fig. 2～Fig. 5.Forging and pressing have lower connecting terminal 15 in the lower end of conducting rod 8, suit and be welded with lower gasket 14 on the conducting rod 8 on lower connecting terminal 15.Be surrounded by capacitor core 9 at the middle part of conducting rod 8.Be set with successively on the conducting rod 8 that is surrounded by capacitor core 9 down insulator 13, side be equipped with the mounting flange 11 of measurement terminal 12, on insulator 7, conservator 18, the upper gasket 17 that is positioned at conservator 18 inner bottom parts, spring 6 etc., and compress spring 6 by the nut 3 that is tightened on conducting rod 8 tops the sleeve pipe integral sealing compressed.Spring 6 of the present utility model adopts butterfly spring.Face seal is equipped with and is rainproofly put 2 on conservator 18, in conducting rod 8 upper ends upper connecting terminal 1 is housed.Side at conservator 18 is equipped with the oil level indicator of being made up of glass 5 and gland 4 etc.Upside at conservator 18 is equipped with air relief cock 16.Be filled with insulating oil 10 at inside pipe casing.

Can find out that from above-mentioned compared with the prior art the utility model has following good effect:

1. because the utility model is equipped with the conservator with oil level indicator on upper insulator, can pass through oil level Meter is observed the Safe Levels of insulating oil in the sleeve pipe, has avoided that pasta is lower than capacitor core in the prior art Therefore the discharge fault that produces during insulation has improved reliability;

2. because the utility model has adopted spring etc. with the whole structure that compresses of sleeve pipe, dismounting during maintenance Sleeve pipe is not limited by process conditions, and is therefore easy to maintenance;

3. because lower connecting terminal of the present utility model is the overall structure that directly forges and presses out in the conducting rod lower end, therefore, not only saves material, eliminated the contact resistance between conducting rod and lower connecting terminal, and dwindled by the dress size.

Claims

1. 35kV oilpaper capacitance graded bushing, comprise upper connecting terminal, rain cover, air relief cock, conducting rod, capacitor core, go up insulator, mounting flange, measurement terminal, following insulator and insulation wet goods, it is characterized in that: the conservator that the band oil level indicator is housed on last insulator;

2. a kind of 35kV oilpaper capacitance graded bushing according to claim 1 is characterized in that: be provided with and place the conservator inner bottom part and be enclosed within the whole holddown spring of sleeve pipe on the conducting rod;

3. a kind of 35kV capacitance graded bushing according to claim 1 and 2 is characterized in that: directly forging and pressing have the lower connecting terminal that becomes one with conducting rod in the conducting rod lower end;

4. a kind of 35kV capacitance graded bushing according to claim 2 is characterized in that: the whole holddown spring of its sleeve pipe is a disk spring.