CN2059698U

CN2059698U - Metal corrugated sheet type expander

Info

Publication number: CN2059698U
Application number: CN 90210054
Authority: CN
Inventors: 邵宏伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-01-12
Filing date: 1990-01-12
Publication date: 1990-07-25

Abstract

The utility model relates to a metal corrugated sheet type expander. The metal corrugated sheet type expander comprises an upper cover, a lower cover, and a metal corrugated sheet which has an expansion function is positioned at the upper and lower contact of the center of the upper cover and the lower cover. The utility model is characterized in that a backing ring is arranged between the upper cover and the lower cover, a wave box which is connected with the upper and lower contact is arranged in the inner of the backing ring, and the wave box is formed by the two metal corrugated sheets having corrugation in opposite direction. A screw rod which is used to connect with the upper cover and the lower cover and a screw cap which is sheathed on the screw rod are used to fix the upper cover and the lower cover. The utility model has the advantages of material allowable value full using, material saving, low cost, easy transportation and reliable operation.

Description

Metal corrugated sheet type expander

The utility model relates to a kind of wavy metal chip expander, and a kind of cubage compensation device when it changes as oil temperature is widely used on current transformer in the high-voltage fence, the voltage transformer or in high-voltage switch gear, electric locomotive and the transformer.

At present commercially available wavy metal chip expander is the container of a kind of variable volume of being formed by the equidirectional gang welding by several thin slices that are pressed into the annular concentric ripple with mould, and its profile resembles the bellows of Accordion very much.Because it is by the overlapping assembly welding of the equidirectional of ripple.Its free height is the sum total of these sheet thickness, when internal pressure changes, its volume becomes thereupon, here have 2 deficiencies, the first is pressed the overlapping combination of corrugated plate equidirectional, the so adjacent sensitivity difference of two corrugated plate pressurizeds up and down, promptly going up corrugated plate is the front pressurized, and its sensitivity is higher, can produce very big displacement, and corrugated plate is the reverse side pressurized down, its sensitivity is lower, and half of corrugated plate on identical pressure bottom offset can only be so just lost second half, thereby wasted material, improved cost; It two is corrugated plate self welding, without any reinforcing structure such as spacing guiding, can only vertical transportation, slightly once vibrations jolt wave and duration of oscillation longer, thereby equal to have reduced self life-span, the side that crouches transportation very easily causes distortion, brings great convenience to the user.

At the deficiency that above-mentioned prior art exists, the purpose of this utility model provides that a kind of cost is low, reliable, the wavy metal chip expander of convenient transportation.

The purpose of this utility model is achieved by the following technical solution: it comprises loam cake, lower cover, the flange plate that is positioned at the lower contact at lower cover center and is fixed on the lower contact end has reached the wavy metal sheet of expansion, its technological points is to be provided with at the center of loam cake to be convenient to install oil pressure, the upper connection of warm display unit of oil or pressure releasing means, on, be provided with two or more gasket rings between the lower cover, be provided with that one or more are made up of two opposite wavy metal sheets of ripple direction in the gasket ring and with last, the ripple box that lower contact is communicated with, the outer end of ripple box is welded on the connecting part of two gasket rings, on, lower cover is fixed by screw rod that connects its two lids and the nut that is enclosed within on the screw rod.The lower contact of transformer oil field enters, and the ripple box that is communicated with lower contact is expanded, and reaches the effect of compensation volume with this.

The utility model is because the ripple box is to be made of two opposite wavy metal sheets of ripple direction, thereby increased compensation rate, made full use of the allowable value of material, and make it bring into play maximum effect, have the advantages that to save material, reduce cost, particularly adopt the axial limiting mechanism of forming by screw rod, gasket ring and upper and lower cover and be welded on the edge limit structure that the ripple box constitutes on the gasket ring, thereby also brought very big convenience, and make it to guarantee reliability of operation to transportation.

The utility model is described in further detail below in conjunction with embodiment and accompanying drawing thereof:

Fig. 1 the utility model structural representation.

Fig. 2 is the local enlarged diagram among Fig. 1.

Fig. 3 is the A-A sectional view among Fig. 1.

Fig. 1～3rd, an embodiment of the present utility model, it comprises loam cake 3, lower cover 7 and laying respectively at, the upper connection 2 at lower cover center, lower contact 8 and be fixed on the flange plate 9 of lower contact 8 ends, last, be provided with 6 gasket rings 11 between the lower cover, gasket ring 11 is provided with the exhaust port 6 of being convenient to discharged air, be provided with 5 in the gasket ring 11 by last, the ripple box 12 that the wavy metal sheet 13 that following two ripple directions are opposite is formed, each ripple box is all by its center hole and last, lower contact 2,8 are communicated with, the outer of each ripple box is welded on the connecting part of adjacent two gasket rings, the structure of corrugated plate is that an outer ripple by the orthodrome sine wave constitutes (see figure 2) with the trapezoidal ripple that is connected this outer ripple, this corrugated plate is except making its displacement increase, can also change the characteristic of corrugated plate, this characteristic is exactly the linear performance on rectangular coordinates, promptly when pressure is increased to certain value, the outer ripple that is made of the orthodrome sine wave will produce the trapezoidal ripple that the middle part is passed in radial displacement, the camber of corrugated plate is increased, produce bigger displacement with this, also be provided with a circular groove 14(on the trough of each corrugated plate referring to Fig. 2, Fig. 3), its effect is the needs that satisfy pumping high vacuum when manufacturing firm detects finished product or uses producer's vacuum oil, on, lower cover 3,7 fix by the nut at screw rod 5 and screw rod two ends, on, ripple box number in gasket ring between the lower cover and the gasket ring as required compensation volume size and decide, at least 2 of gasket rings, the ripple box at least one.Chemically examine or vacuumize oiling usefulness in order to guarantee that expander draws oil sample at any time in proper functioning, on the pipeline that is communicated with lower contact one side, be provided with vacuum valve 10.But setting pressure table 1 in the upper connection 2, but also setting pressure releasing device, but setting pressure sensor also are for advantage has been created in control automatically.

Claims

1, a kind of wavy metal chip expander, it comprises loam cake, lower cover, be positioned at the lower contact at lower cover center and be fixed on the flange plate of lower contact end and the wavy metal sheet that plays expansion, it is characterized in that: be provided with the upper connection of being convenient to install oil pressure or oily temperature display unit or pressure releasing means at the center of loam cake, on, be provided with plural gasket ring between the lower cover, be provided with that one or more are made up of two opposite wavy metal sheets of ripple direction in the gasket ring and with last, the ripple box that lower contact is communicated with, the outer end of ripple box is welded on the connecting part of two gasket rings, upper and lower covers by connecting two lids screw rods and be enclosed within fixed by nut on the screw rod.

2, by the described wavy metal chip of claim 1 expander, it is characterized in that: the wavy metal sheet is that the outer ripple by an orthodrome sine wave constitutes with the trapezoidal ripple that is connected this outer ripple.

3, by the described wavy metal chip of claim 1 expander, it is characterized in that: gasket ring is provided with exhaust port.

4, by claim 1 and 2 described wavy metal chip expanders, it is characterized in that: on the trough of each wavy metal sheet, also be provided with a circular groove.