CN201282006Y

CN201282006Y - Oil tank structure of power distribution power transformer

Info

Publication number: CN201282006Y
Application number: CNU2008200363683U
Authority: CN
Inventors: 陈兴福
Original assignee: CHANGZHOU SPECIAL TRANSFORMER Co Ltd
Current assignee: CHANGZHOU SPECIAL TRANSFORMER Co Ltd
Priority date: 2008-05-28
Filing date: 2008-05-28
Publication date: 2009-07-29
Anticipated expiration: 2018-05-28

Abstract

An oil tank structure for a distribution power transformer belongs to the field of power equipment. An oil tank comprises a tank cover, a tank edge, a tank body and a corrugated sheet, wherein, the tank edge is arranged at the upper end of the tank body; the tank cover is arranged on the tank body; the corrugated sheet is arranged outside the tank body; the bottom surface of the tank body is downward convex; the downward convex bottom part forms a tank bottom; the width of the tank bottom is 15 to 20mm larger than that of a support plate for two lower clamping pieces of the iron core of the transformer; and the downward convex bottom surface of the tank body forms a lower section of oil groove. Under the condition that any parameters of the transformer are not changed, the utility model saves the oil of the transformer, and solves the problem that a body of the transformer has difficulties to be placed in the tank.

Description

Oil tank construction for electricity distribution power transformer

Technical field:

The utility model belongs to field of electrical equipment, specifically is a kind of oil tank construction for electricity distribution power transformer.

Background technology:

In the prior art, urban residents district, urban cells power supply have the effect of two aspects with the fuel tank of electricity distribution power transformer, on the one hand the live part and the external world of unshakable in one's determination and whole device body are separated fully, splendid attire transformer oil on the other hand, and the heat that the device body is produced when by transformer oil transformer being moved is dispersed in the surrounding air and goes.

At present the distribution transformer fuel tank adopts structure: according to the diameter of line high-tension coil, add that enough electrical distance sizes are the width dimensions of fuel tank, along equally being constant at the bottom of case, the welding locating pin fixes the device body to this size at the bottom of the case from case.The shortcoming of this Oiltank structure: the first, because the heat of transformer mainly is the load loss generation of coil, and more than the main heat radiation center of concentrating of heat radiation, heat makes progress simultaneously, the caloric value of lower yoke unshakable in one's determination is seldom, so, do not working the usefulness of dispelling the heat with near the lower clamping piece upper supporting plate of device body is concordant transformer oil, actual is to have formed the region of bypassed oil, has wasted transformer oil; The second, owing to be welded with locating pin at the bottom of the case at the bottom of the case, locating pin is to cooperate with location hole on the device body pad pin, give device body nowel and increased difficulty, often see that the assembler shakes right rolling with play device left side in fuel tank of installing loam cake of driving, the phenomenon that can not load exactly, if the locating pin dimensional discrepancy a little more greatly, that lifting will be difficult unusually.Because the size of location hole and locating pin generally is to differ 5～7.5mm.Tradition fuel tank lower segment groove such as Fig. 2 show.

Summary of the invention

In order to solve the above-mentioned problems in the prior art, the utility model proposes a kind of new oil tank construction for electricity distribution power transformer.This product use the electricity distribution power transformer for the power supply of urban residents district, urban cells, and during this structure transformer specification belongs in power transformer, other distribution transformer of low capacity level, capacity is 30～2000kVA usually, and specifically technical scheme is as follows:

A kind of oil tank construction for electricity distribution power transformer comprises case lid, case edge, casing and ripple river in Shangdong Province sheet, and case is along the upper end that is located at casing, and case lid should be on casing, and ripple river in Shangdong Province sheet is located at outside the casing.The bottom surface of described casing constitutes at the bottom of the case for following convex, the bottom of following convex; Width at the bottom of the case is than the big 15～20mm of width of two lower clamping piece support plates of the iron core of transformer, and the following convex of the bottom surface of described casing constitutes fuel-economizing groove down.

The height of convex upper edge is identical with the height of two lower clamping pieces of the iron core of transformer under arriving at the bottom of the described case.It at the bottom of the described case horizontal plane.

The ripple river in Shangdong Province sheet that is used to dispel the heat is directly to be welded on tank wall, and is long-pending with the whole outer surface that increases fuel tank, by ripple river in Shangdong Province sheet quantity to reach the requirement of transformer heat radiation.

The fuel tank of transformer is that steel plate welding forms, and divides case lid, case edge, ripple river in Shangdong Province sheet, fuel-economizing groove down, following fuel-economizing groove and case along between be connected with four angle steel, ripple river in Shangdong Province sheet does not bear and lifts by crane heavy burden.

The utility model is saved transformer oil under the situation that does not change any parameter of transformer; Solve the problem of transformer body nowel difficulty.

Description of drawings

Fig. 1 is a lower segment groove schematic diagram of the present utility model

Fig. 2 is traditional fuel tank lower segment groove schematic diagram

1 is following fuel-economizing groove, and 2 be lower clamping piece, and 3 is iron core, and 4 is coil, and 5 is heat transmission ripple river in Shangdong Province fin, 6 be case at the bottom of

Embodiment

A kind of oil tank construction for electricity distribution power transformer comprises case lid, case edge, casing and ripple river in Shangdong Province sheet 5, and case is along the upper end that is located at casing, and case lid should be on casing, and ripple river in Shangdong Province sheet 5 is located at outside the casing.The bottom surface of described casing is following convex, and the bottom of following convex constitutes at the bottom of the case 6; 6 width is than the big 15～20mm of width of two lower clamping pieces, 2 support plates of the iron core of transformer at the bottom of the case, and the following convex of the bottom surface of described casing constitutes fuel-economizing groove 1 down.

6 is identical with the height of two lower clamping pieces 2 of the iron core 3 of transformer to the height of following convex upper edge at the bottom of the described case.6 is horizontal planes at the bottom of the described case.

The ripple river in Shangdong Province sheet 5 that is used to dispel the heat is directly to be welded on tank wall, and is long-pending with the whole outer surface that increases fuel tank, by ripple river in Shangdong Province sheet 5 quantity to reach the requirement of transformer heat radiation.

Fig. 2 is traditional fuel tank lower segment groove schematic diagram, the utility model fuel tank bottom tank wall becomes the straight barrel-shaped following convex that is, width at the bottom of the case is that two lower clamping piece support plate Breadth Maximums add upwards bending of 15～20mm, the concordant case that outwards is bent to of upper supporting plate that is elevated to lower clamping piece is along wide, upwards bending and the welding of ripple river in Shangdong Province sheet, its section shape dress is as Fig. 1.If fuel tank length is 1200mm, be 160mm to lower clamping piece upper supporting plate height at the bottom of the case, the every limit indentation of section 80mm, then separate unit saving transformer oil is: 1200 * 160 * 80 * 2 ÷, 1000000 * 0.8kg/dm ²=24.576kg; Go to have disappeared at the bottom of the case after the locating pin, the steel of saving are about 1kg.

Economic benefit of the present utility model is appreciable, if middle-size and small-size oil-immersed distributing transformer, all useful this structure, if average year is produced 2000 meters, year can be saved transformer oil: 2000 * 24.576=49152kg steel: 2000kg.

Claims

1, a kind of oil tank construction for electricity distribution power transformer comprises case lid, case edge, casing and ripple river in Shangdong Province sheet, and case is along the upper end that is located at casing, case lid should be on casing, ripple river in Shangdong Province sheet is located at outside the casing, it is characterized in that the bottom surface of described casing is following convex, and the bottom of following convex constitutes at the bottom of the case; Width at the bottom of the case is than the big 15～20mm of width of two lower clamping piece support plates of the iron core of transformer, and the following convex of the bottom surface of described casing constitutes fuel-economizing groove down.

2, oil tank construction for electricity distribution power transformer according to claim 1 is characterized in that arriving the height of convex upper edge identical with the height of two lower clamping pieces of the iron core of transformer at the bottom of the described case.

3, oil tank construction for electricity distribution power transformer according to claim 1 is characterized in that at the bottom of the described case be a horizontal plane.

4, be connected with angle steel between the oil tank construction for electricity distribution power transformer according to claim 1, the top that it is characterized in that described down fuel-economizing groove and case edge.