CN2218964Y

CN2218964Y - Oil storage tank for corrugated pipe transformer

Info

Publication number: CN2218964Y
Application number: CN 94230169
Authority: CN
Inventors: 孙艺夫
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-25
Filing date: 1994-09-08
Publication date: 1996-01-31
Anticipated expiration: 2004-09-08

Abstract

The utility model relates to a transformer oil compensation apparatus-an oil storage tank for a corrugated pipe transformer. A metallic corrugated pipe assembly which can isolate the transformer oil from the outside air is arranged in the outer shell of the oil storage tank for a transformer; the inner oil type or the outer type can be adopted; the corrugated pipe can be arranged adopting the vertical type or the horizontal type. The adoptive metal corrugated pipe is made by adopting the method of plastic forming and has the excellent flexibility; the sufficient volume compensation of the transformer oil can be realized making use of large variation of the internal capacity produced by the expansion and contraction of the elastic element. The problem of the leakage of the oil storage tank can be thoroughly solved; the utility model has safety, long service life, low cost and convenient installation.

Description

Corrugated pipe type transformer sump

The utility model relates to a kind of transformer oil compensation arrangement-corrugated pipe type transformer sump.

This is the indispensable protectiveness parts of a kind of transformer, and its effect is volumetric expansion or the contraction that insulating oil produces because of variations in temperature in the compensator transformer, is not damaged with protection transformer housing.

Present transformer oil-expansion vessel (also claiming conservator) mainly contains three kinds.First kind is a simple oil tank, and an oil-in is arranged, an exhaust outlet and an oil level indicator.This oil-expansion vessel is generally used on the miniature transformer, and its greatest problem is that transformer oil communicates with outside air, so easy moisture absorption of transformer oil and oxidation, thereby causes insulation property to reduce, and causes accident to take place.Second kind is rubber bag tank formula oil-expansion vessel, it is that rubber bag tank is placed oil tank, the effect of capsule is to make transformer oil and isolate from outer air, compensate the variation of oil volume simultaneously by its breathing, its subject matter is poor reliability, easily aging, cracky, easily produce and leak, must carry out exhaust when installing simultaneously, inhale the vacancy reason.Using at present maximum is the third oil-expansion vessel, i.e. diaphragm of rubber formula oil-expansion vessel, and second kind of its similar just changes capsule into sheet rubber, though reduced cost, also be easy to show oil level, increased loaded down with trivial details assembly program, because sealing surface is big, be easy to especially leak, need regular maintenance.The two kinds of oil-expansion vessels in back generally are applied on the medium-and-large-sized transformer.Problems such as the leakage of oil of above-mentioned these several oil-expansion vessels, poor reliability are perplexing the designer and the manager of whole power transmission and transformation industry always, also are domestic and international power equipment problems anxious to be solved.

The purpose of this utility model provides a kind of novel transformer oil-expansion vessel, and it can overcome many deficiencies of above-mentioned several transformer oil-expansion vessels fully.Make it be difficult for leaking, safe and reliable, simple installation, easy to manufacture, production cost is low.

The purpose of this utility model is achieved in that

The bellows component that a metal bellows made from plastic molding method constitutes is installed in the transformer oil-expansion vessel, its effect is that transformer insulation oil and outside air are isolated, and utilizes this flexible member of the bellows great variety that internal capacity is produced when it is flexible to realize sufficient volume compensation to transformer oil simultaneously.The structure of this kind oil-expansion vessel can adopt inner oil type be transformer oil in bellows, or outer oil type be transformer oil outside bellows, and the mounting means of bellows also can adopt vertical or horizontal.

Compared with prior art, this structure has following superiority: 1, bellows is made of metal (being generally stainless steel), and intensity own is higher, does not have problems such as aging and air penetration, and is therefore safe and reliable, long service life.2, bellows is an all welded construction, does not have sealing part, has thoroughly solved leakage problem.Behind the disposable installation qualification, need not regular maintenance and maintenance, therefore greatly reduce maintenance cost, and reduced loss of outage.3, simple installation.Add oil when bellows can dispatch from the factory in manufactory, the emptying air does not need to remake pump-down process during on-the-spot the installation, greatly reduces the execute-in-place difficulty, improves the reliability of equipment simultaneously.4, the bellows by optimal design has sizable volume compensation ability and fabulous flexibility, the oil pressure that produces during maximum displacement≤± 0.01MPa.5, this bellows manufacturing is to adopt existing maturation process, i.e. thin plate butt joint is welded into pipe, becomes out ripple by plastic deformation then on forming machine.Method is simple, and stock utilization can reach more than 90%.

Describe its structure and operation principle in detail below in conjunction with the embodiment accompanying drawing.

Fig. 1 is the vertical bellows oil-expansion vessel of an inner oil type schematic diagram.

Fig. 2 is the horizontal bellows oil-expansion vessel of an inner oil type schematic diagram.

Fig. 3 is the vertical bellows oil-expansion vessel of an outer oil type schematic diagram.

Fig. 4 is the horizontal bellows oil-expansion vessel of an outer oil type schematic diagram.

Embodiment 1: referring to Fig. 1, on the vertical bottom surface that is installed in transformer oil-expansion vessel shell 5 of bellows component 1, it is inner oil type that the base plate of oil-in 2 and bellows component 1 links together, and 6 is oil level indicator, and 3 is sewage draining exit, and 4 is pneumostome.

When transformer insulation oil heats up expansion, enter in the bellows component 1 by oil-in 2, under positive pressure, the bellows elongation, the air in the oil-expansion vessel housing 5 are discharged by pneumostome 4, promptly finish the heat expansion compensation; When the transformer insulation oil cooling is shunk, under suction function, bellows contract, the oil in the bellows component 1 flows out by oil-in 2, enters transformer, and air is sucked in the oil-expansion vessel housing 5 by pneumostome 4, promptly finishes shrinkage-compensating.

Embodiment 2, referring to Fig. 2, and bellows component 1 horizontal placement, all the other structures and the foregoing description 1 are basic identical, and be parallel in order to guarantee horizontal bellows both ends of the surface, and guiding mechanism 7 need be set.

Embodiment 3, and referring to Fig. 3, oil-in 2 links to each other with transformer oil-expansion vessel shell 5 base plates, and it is outward outer oil type that insulating oil is in bellows, and bellows component 1 communicates with ambient atmosphere by pneumostome 4, and bellows component 1 is welded on the top of shell 5, adopts vertical setting.

Embodiment 4, referring to Fig. 4, also adopt outer oil type, and bellows component 1 adopts horizontal setting, also guiding mechanism 7 need be set.

As can be seen from the figure, owing to have the oil-expansion vessel of above-mentioned bellows structure, can vary with temperature and the huge change in volume that produces is fully regulated and compensated transformer oil fully, thereby the protection transformer case is not subject to any damage.

The used bellows of above-mentioned bellows-type oil-expansion vessel, its waveform can be waveforms such as U-shaped, V-arrangement, Ω shape and S shape, its manufacture method can adopt plasticity such as hydraulic pressure, mechanical bulging, rubber and the rubber bag tank method that becomes second nature.

Claims

1, a kind of transformer oil compensation arrangement---corrugated pipe type transformer sump, its structure includes oil-in (2), sewage draining exit (3), pneumostome (4), shell (5) and oil level indicator (6), it is characterized in that: body plan has bellows component (1) in the shell (5) of transformer oil-expansion vessel.

2, corrugated pipe type transformer sump according to claim 1 is characterized in that: transformer oil and vertical being arranged in the shell (5) are housed in the bellows component (1).

3, corrugated pipe type transformer sump according to claim 1 is characterized in that: bellows component is equipped with transformer oil in (1), can horizontally be arranged in the shell (5).

4, corrugated pipe type transformer sump according to claim 1 is characterized in that: transformer oil and vertical being arranged in the shell (5) are housed outside the bellows component (1).

5, corrugated pipe type transformer sump according to claim 1 is characterized in that: bellows component (1) is outer to be equipped with transformer oil, can horizontally be arranged in the shell (5).