CN2241379Y

CN2241379Y - Transformer oil tank with edge-flanged cover

Info

Publication number: CN2241379Y
Application number: CN 96202212
Authority: CN
Inventors: 陈鹰; 柳溪
Original assignee: YUNNAN TRANSFORMER FACTORY
Current assignee: Yunnan Transformer Electric Co., Ltd.
Priority date: 1996-01-08
Filing date: 1996-01-08
Publication date: 1996-11-27
Anticipated expiration: 2006-01-08

Abstract

The utility model relates to a transformer oil tank. The existing porch covering sealed transformer tanks which are unsuitable for oil tanks of larger sizes have the disadvantages of high cost and low productivity. The utility model is characterized in that a horizontal outer porch is arranged at the upper opening of a tank body which is made of steel plates; the outer porch of the tank body is covered with a folding edge which is arranged on the periphery of the steel plate tank cover; a sealing strip is arranged between a tank cover and the horizontal outer porch of the tank body; the tank cover and the tank body are connected into a whole by screw bolts which are arranged outside the sealing strip; a metal spacing strip which is welded on the outer porch of the tank body is provided with the function of sealing strip compression and spacing. The utility model has the advantages of simple structure, favorable protective effect, low cost, high productivity, light self weight and beautiful appearance. The utility model is applicable to various transformers of any type.

Description

Oil tank of transformer with flanging case lid

The utility model is a kind of oil tank of transformer.

Application number is that 92215879.7 Chinese patent application file has been announced a kind of " cover edge hermetically sealed type transformer case ".Its objective is and prevent that dust, rainwater etc. from entering in the case.Its structure is that case lid has an evagination cover edge to cover casing, and there is a V-shaped groove casing upper edge, puts into sealing ring in it.The shortcoming of this structure is that casing must be foundry goods, is not suitable for the bigger fuel tank of physical dimension; Need process V-shaped groove on the casing, the cost high production rate is low; The moisture that accumulates in the V-shaped groove can make corrosion of metal, and influences the useful life of sealing ring.

The purpose of this utility model provides and a kind ofly can prevent that sealing joint strip from being worn out, chapping by ultraviolet irradiation and prevent that dust, rainwater etc. from entering in the case, and is applied widely again, the low and service-strong oil tank of transformer of cost easy to manufacture.

The utility model is made up of case lid and casing two parts, it is characterized in that there is a horizontal outer on casing both sides or four limits suitable for reading that metallic plate is made, case lid both sides that metallic plate is made or four limits have a downward flanging to cover casing horizontal outer suitable for reading, flanging can also but out of plumb be downward vertically downward, one sealing strip places between case lid and the horizontal outer of casing, and sealing strip has bolt that case lid and the horizontal outer of casing are combined as a whole outward.All there is horizontal outer on casing best four limits suitable for reading and all there is flanging vertically downward on best four limits of case lid.Casing preferably is welded with the metal positive stop strip on the horizontal outer, plays the compression position-limiting action of sealing strip.Because flanging covers the casing outer, can prevent that sealing joint strip from being worn out, chapping by ultraviolet irradiation and prevent that dust, rainwater etc. from entering in the case.The most important functions of sealing strip is to prevent the transformer leakage of oil, so the utility model can improve the anti-leakage of oil of transformer greatly.Flanging has also been covered defectives such as get rusty in the case edge, distortion, has beautified the transformer outward appearance.Flanging around the case lid also can play reinforcement, makes case lid be difficult for being out of shape because of factors such as welding, thereby can reduce case lid thickness, saves metal material.

Compare with prior art, the utility model has the advantages that simple in structurely, protection effect is good, and applicable to large, medium and small transformer, processing technology is simple, does not need founding foundry goods and processing trough, manufacturing cost poor efficiency height, and from heavy and light, good looking appearance.

Fig. 1 looks the part section structural representation for the master of embodiment.

Fig. 2 is the enlarged drawing of Fig. 1 midship section part.

Fig. 3 is the structural representation of case lid among the embodiment, and wherein 3-A is main looking, and 3-B is for overlooking, and 3-C is that a left side is looked.

Embodiment: see Fig. 1-3.There is a horizontal outer 2 on four limits suitable for reading of the casing 1 that steel plate is made, there is vertically downward a flanging 4 to cover casing horizontal outer suitable for reading around the case lid that steel plate is made 3, one rubber weather strip 5 places between case lid and the horizontal outer of casing, and sealing strip has bolt 6 that case lid and the horizontal outer of casing are combined as a whole outward.On the horizontal outer of the casing outside the bolt 6, be welded with a round steel positive stop strip 7.The diameter of sealing strip 5 is 16 millimeters, and the diameter of round steel 7 is 10 millimeters, and the thickness of case lid steel plate is 6 millimeters, and the height of flanging 4 is 28 millimeters.

Claims

1, a kind of oil tank of transformer with flanging case lid, form by case lid and casing two parts, it is characterized in that there is a horizontal outer on casing both sides suitable for reading or four limits that metallic plate is made, the both sides of the case lid that metallic plate is made or four limits have a downward flanging to cover casing horizontal outer suitable for reading, one sealing strip places between case lid and the horizontal outer of casing, and sealing strip has bolt that case lid and the horizontal outer of casing are combined as a whole outward.

2,, it is characterized in that all there is horizontal outer on casing four limits suitable for reading and all there is flanging vertically downward on case lid four limits as the said oil tank of transformer of claim 1.

3,, it is characterized in that on the horizontal outer of the casing outside the said bolt, being welded with a metal positive stop strip as the said oil tank of transformer of claim 1.