US1872308A

US1872308A - Tank structure

Info

Publication number: US1872308A
Application number: US493485A
Authority: US
Inventors: Llewellyn Fredrick
Original assignee: Westinghouse Electric and Manufacturing Co
Current assignee: CBS Corp
Priority date: 1930-11-05
Filing date: 1930-11-05
Publication date: 1932-08-16
Anticipated expiration: 1949-08-16

Description

fastening of the cover from the casing.

bolts nuts and gasket.

Patented Aug. 16, 1932 PA E OFFICE "annex nmc'rmc a muracmmeoonm. a ooarom'rron or rnnnsnv'ama s'rnucmn I a plicat on med November Myinvention electrical apparatus and more particularly to the tank structure of encased eil innnersetl" electrical apparatus, such as transformers of very large K! size and capacity.

During recent years, the size of oil-immersed transformers has so increased, that it has become customary in transformers of r H large size to split the tank into two sections 10 for transportation or handling, the tank being sectionalized at such an elevation that the transformer could be shipped in the lower section thereof. Previously the same cover M used in the general assembly of the, trans- I former was used during shipment'of the lower section of the split tank. This necessitated the removal of the fittings attached to the top of the transformer, the plugging of the openings left by the fittings and the untank at its destination reassembly of the order of the work just menquired the reverse tioned.

In the final assembly of the tank, gas leakage is one of the difiiculties encountered when the cover is secured by bolts. As the size of transformers increases, the work necessary for detaching the transformer fitting from the tank, for shipment becomes involved and entails considerable time and expense. Sectionalizing the tank for shipment often reduces the freight charges, which are some-' times based on the volume of the unit shipped. j g z The general object of my invention is to I improve the structure of a sectionalized tank.

A. further object of my invention is to provide a sectionalized transformer tank which shall be free from leakage and economical to construct.

Another object of my invention is to provide a transformer tank or casing which may be conveniently and economically disas sembled for shipment and reassembled thereafter. a

A further object is to eliminate, and, consequently, to save the cost of, an angle" ring, drilling both the angle ring and cover plate,

5,;1eao. Serial m. 495,435."

- In accordancewith my invmtion, the upper end of the sections-lined tank section is closed by a cover plate, which is secured thereto by welding while a temporary cover closes the lower section vofthesplit tank duringdiipment." x..

The invention, together with additional ob:- jects and advantages thereof, will bebetter understood from the following-description of a specific'embodiment, when read in (3011- junction with the accompanying drawing in which: v Figure 1 is a view partly in'front elevation and partly in section, showing an encased oil i-mmersed' transformer embodying any invention; i

Figure 2 isan enlarged vertical sectional vi w showing the top portion of-the split Figure "3' is a sectional view showing the lower section of the transformer tank closed by a temporary cover and ready for shipment or handling.

Like reference characters indicate similar parts in the difierent figuresof the drawing. Refening'specifically to the drawing, the apparatus shown in Fig. 1 comprises a tank 1 containing an oi l-immersed transformer 52, enclosed by a suitable casing 3. Radiators 4 and headers'fi of suitableconstructien may "be attached to thecasing As is usualfin afil imme'rsed transformers, there issuficient space between thetra-nsformer 2 and the cover '6 tooonta'in the coil necessary for the cooling of the transformer, the transformer" leads,--* bushings andconnections (not shown). lhe Ii-upper portion 7 of'the tankis separable from "the lower thereonas shown iii-Figs.

1 L i around the loweredge of the upper 7 isanmngle ring 8 which provides a laterally extending flange." The flange ofthe a le ring is provided, with bolt holes 9 suitab y spaced for receiving connectingbolts 1'0. RibS 12 are attached to section 7fby suitable means, while a cover fi is fi-rmly se- --cured, ier example,bya weld 13 to ribs 12 and tlae' upper section 1', The r-i bs 12-strengthen the-union of the cover (land theupper-section T and provide a for or rinnrsnvnnm nssmnon To w ns'rmanousi'a i the cover is. The-a4 weld 13 serves also as a seal, thereby eliminating the usual gasket between the cover and the tank.

As shown in Figs. 1 and 3, an angle ring 1 1 is secured around the upper edge of the lower portion of the casing 3 at its meeting edge 16 in any suitable manner and provides a laterally extending flange which is provided 7, with bolt holes 17 of the same size and spacing as those of angle ringSof the upper section 7. A temporary cover 18 isprovided for use during shipment and storage that engages the flange 14 and is locked thereto by" means of bolts 10, as shown in. Fig. 3. A solid temporary cover 18 is used, thus eliminating the apertures in the original cover after the usual transformer fittings have been removed.

' Upon arrival at its destination, the temporary cover 18 is removed from the casing 3, and the upper section 7, with all parts attached to the cover, as before shipment, is replaced. 7

' It will be seen, therefore, that I have provided a transformer-tank structure, so divided into upper and lower parts that the transformer may be shipped in the lower part, immersed in oil, and the cover and upper section may be shipped with all parts attached to the cover, assembled, thereby reducing the height and volume of the units to be transported and also eliminating the inconveniences and expense involved'in disassembling the fittings, leads and connections from the cover of the tank, and covering the openings thereby exposed.

Although I have shown and described cer tain specific embodiments of my invention, I am fully aware that many modifications thereof are possible. My invention, therefore, is not to be restricted except insofar as is necessitated by the prior art and by the spirit of the appended claims.

I claim as my invention V p 1. In combination, a transformer having an enclosing split casing, a fixed cover welded to the upper edge of said casing, a temporary cover, and means for attaching said temporary cover to the split edge of said enclosing split casing.

2. In combination, a transformer having an enclosing casing, said enclosing casing being divided into an upper section and a lower section, a fixed cover welded to the upper edge of said upper section, a temporarycover, and means for attaching said temporary cover to said lower section.

3. In combination, a transformer having an enclosing casing, said enclosing casing being divided into an upper section and a lower section, a fixed cover Welded to the upper edge of said upper section, a series of rib braces around the inside top edge of said upper section, means for securing said rib braces to said upper section, a temporary cover, and

means for attaching said temporary cover to said lower section of said enclosed casing.

4. In combination, a transformer having an enclosing casing, said casing being divided into an upper section and a lower section, a series of rib braces secured around the inside top edge of said upper section, and means for securing said series of rib braces to said upper section, a fixed cover welded to the upper edge of said upper section of said casing and welded to said series of rib braces, a temporary cover, and means for attaching said temporary cover to the lower section of the said casing.

In testimony whereof, I have hereunto subscribed myname this 29th day of October,

FREDRICK LLEWELLYN.