US2171972A

US2171972A - Pressure vessel and method of making same

Info

Publication number: US2171972A
Application number: US98764A
Authority: US
Inventors: Debor Hermann
Original assignee: Dominion Oxygen Co Ltd
Current assignee: Dominion Oxygen Co Ltd
Priority date: 1935-09-05
Filing date: 1936-08-31
Publication date: 1939-09-05
Anticipated expiration: 1956-09-05

Description

Sept. 5, 1939. H. DEBOR PRESSURE VESSEL AND METHOD OF MAKING SAIE Filed Aug. 31, 1936 INVENTGR HERMA NN DE BOR ANEY Patented Sept. 5, 1939 PATENT OFFICE PRESSURE VESSEL AND METHOD or Ma ING SAME Hermann Debor,

Munich, Germany, assignor to Dominion Oxygen Company, Limited, a corporation of Canada Application August 31, In Germany Se is Claims.

This invention relates to metallic containers, and more particularly to prising a plurality of interconnected and preferably intersecting hollow spheroids.

Such containers have been constricting and expanding a tube to form spheroidal zones. Other pressure vessels of this type have been formed by casting or by welding together hollow sections.

The present invention relates to an improved The principal objects of the present invention are to provide improved processes for the manufacture of containers having a plurality of interconnected spheroids; to provide an improved process for welding hemi-spheroidal shells together to form a container consisting of a series of interconnected hollow spheroids; and to provide a new and improved sisting of interconnected hollow spheroids which may be fabricated from elements formed from sheet metal. These and. other objects of the invention will become apparent from the following description and from the accompanying drawing showing an' elevational view partly in sec-' tion of a container embodying features of the invention.

Referring to the drawing, a container made ac cording to the present invention comprises a pair of end sections it and I2 consisting of hollow hemi-spheroidal elements, and a plurality of similar shaped elements or shells l3 and i4 comprising intermediatefisections. The shells are preferably formed in any convenient manner from sheet metal according to any well known process, for example, by stamping or spinning. The bottom end section I2 consists of a cap of substantially hemi-spherical shape, Preferably provided with an annular, inwardly projecting flange l5 at a zone adjacent to the rim l6 about the open end. The intermediate sections l3 and I4, and the top end section I l comprise truncated hemi-spheroidal shells, each having an aperture l8, preferably of circular shape, formed by perforating the wall of the shell opposite the largediameter end. The annular zone adjacent to the rimof the large-diameter end is bent inwardly to 1936, Serial No. 98,764 ptember 5, 1935 form the flanges l9 so that when the respective sections are placed together, that is with the large-diameter ends of adjoining sections juxtaposed, a circumferential groove I! is formed. Similarly the peripheral zone adjacent to the aperture I8 of each intermediate section is deformed so as to provide flanges 20 which form the inner annular groove 2| when adjacent sections are placed together with the large-diameter ends opposed. The zone adjacent to the aperture l8 of the top end section I I may be provided with an inwardly projecting flange 22 which serves as a means for mounting a filling and discharge neck 23 for the container. The inner end 24 of the neck 23 preferably flares outwardly and overlaps the flange 22. Weld material 25 may be deposited in the annular groove formed between the flange 22 and the neck 23.

According to one method of assembling the pressure vessel, the desired number of intermediate sections l3 and M are assembled in pairs back to back, that is, with the large diameter ends opposed and with adjoining apertures l8 properly aligned so as to form the groove 2 I. The respective sections l3 and It may then be united in pairs by depositing solder, braze material, or weld metal 26 (all of which are herein described and claimed as weld metal or weld material) within the groove 2| through the large-diameter end of either section I3 or M. The assembled pairs of intermediate sections may then be positioned adjacent one another so that the rims of the largediameter ends align to form the grooves l1. Solder, braze material, or weld metal 21 may then be applied in the outer annular grooves I! to unite the pairs of intermediate sections in a ion.- gitudinally extending series of interconnected spheroids, until the container has attained the desired length. The rims of the end sections I and 12 are then welded (or brazed, etc.) about the periphery to the respective large-diameter ends of the terminal intermediate sections in a similar manner so as to complete the container.

As an optional method of assembly, an end section may be welded about its rim to the adjoining hemi-spherical shell comprising an intermediate section, after which successive intermediate sections I3 and [4 may be welded alternately about the edges of the small diameter end or aperture l8 and about the rim of the largediameter end until the container has attained the desired length, at which time the opposite end section may be welded in place. In either case the weld material may be deposited either within the groove, or simply about the edges of the aperture II by inserting a welding tool from the open end of each shell.

As the inner end 24 of the neck I! flares outwardly and bears against the flange 2!, pressure and I! may project inwardly a distance greater or less than the adjoining flange, as shown in the drawing and as shown and claimed in my United States Patent No. 2,148,234, to permit the rims to align themselves for welding when placed in the approximate position, and to obviate the need of a jig in the assembly operation. Otherwise, the flanges II and I! may be made identical, in which case .they abut along an annular edge. The grooves l1 and 2| may be made by fianging the rims of the hemi-spheroidal shells and the edges of the apertured portions, in any convenicnt manner, or the grooves may be formed by providing a slight space between the two adjoining parts and without deforming the edges. The groove 2| and the deposit of weld material 26 which serve to reinforce the spheroids at the plane of intersection, may be enlarged as the size of the aperture l8 decreases, to provide the additional support required for such change in the proportions.

Certain details of the hereindisclosed container and the processes of making the same may be varied without departing from the principles of this invention or sacrificing its advantages.

I claim:

1. Process for producing a metallic pressure vessel having a series of interconnected hollow spheroidal zones, said process comprising deforming sheet metal to form hollow hemispheroidal end sections and hollow hemispheroidal intermediate sections. axially aperturing the intermediate sections, joining the respective intermediate sections in axial alignment by welding the margins of adjoining apertures together and by welding the rims of adjoining sections together, and welding the rims of the end sections to the rims of the opposed intermediate sections.

2. Process for producing a metallic pressure vessel having a series of interconnected hollow spheroidal zones formed of assembled hollow hemi-spheroidal end sections and hollow axially apertured hemi-spheroidal intermediate sections, said process comprising bending the rims of the end sections and the rims of the intermediate sections .inwardly to form an outer annular groove when adjacent sections are in assembled position, bending the edges of the respective apertures inwardly to form an inner annular groove when adjacent sections are in assembled relation, and securing the respective sections together by depositing weld metal in the respective grooves.

3. Process for producing a metallic pressure vessel consisting of a series of interconnected hollow spheroidal zones, said process comprising forming hollow hemi-spheroidal end sections, forming hollow hemispheroidal intermediate sections, aperturing the intermediate sections, placing each pair of intermediate sections adjacent to one another with the large-diameter ends oppositely disposed andwith the respective apertures juxtaposed, securing the respective intermediate sections together in pairs by welding about the edges of adjoining apertures, welding such pairs together about the ribs of adjoining large-diameter ends, and welding the rims of the end sections to the outwardly disposed rims of the terminal intermediate sections.

a 4. Process according to claim 8 wherein the edges of the apertures and the rims of the largediameter ends are flanged inwardly forming annular grooves when the sections are assembled, and wherein the welding is performed in the annular grooves.

5. Process according to claim 1 wherein the adjacent intermediate sections are successively welded alternately about the apertures and about the rims.

6. Process according to claim 8 wherein at least one of the end sections is welded about its rim to the adjoining intermediate section after the intermediate sections have all been welded together.

7. In the process of producing a metallic pressure vessel having of a series of interconnected hollow spheroidal zones formed from a pair of hollow end sections and at least one pair of axially perforated hemispheroidal intermediate sections, the steps comprising mounting the intermediate sections with the perforations adjacent, securing said intermediate sections together by welding about the edges of the perforations, and welding the rims of said end sections to the oppositely disposed rims of said intermediate sections.

8. In the process of forming a pressure vessel of intersecting hollow spheroids by assembling a series of hemispheroidal shells having apertures opposite the large-diameter ends; the steps comprising positioning the shells together alternately with the apertures and large-diameter ends in juxtaposed relation and welding the shells together about the edges of the apertures and about the rims of the large-diameter ends.

9. In the process' of forming a pressure vessel of intersecting hollow spheroids by assembling a series of hemispheroidal shells having apertures opposite the large-diameter ends; the steps comprising positioning the shells together alternately with the apertures and large-diameter ends in juxtaposed relation and welding the shells together about an inner annular zone adjacent to the periphery of the apertures and about an outer annular zone adjacent to the rims of the largediameter ends.

10. In the process of forming a pressure vessel of intersecting hollow spheroids by assembling a series of hemi-spheroidal shells having apertures opposite the large-diameter ends; the steps comprising positioning pairs oi shells together with respective apertures in juxtaposed relation, welding the shells about an inner annular zone adjacent to the periphery of the apertures, subsequently positioning the respective welded pairs together with the rims of the large-diameter ends in juxtaposed relation and welding the pairs together about an outer annular zone adjacent to the rims of the large-diameter ends.

11. A pressure vessel of interconnected hollow spheroids comprising hollow substantially hemispherical end sections, and a plurality of hollow substantially hemi-spherical intermediate sections, each of said intermediate sections being provided with an aperture opposite its large-diameter end, said intermediate sections being mutually welded together adjacent to the periphery of the respective adjoining apertures and about the rims of the respective adjoining large-diameter ends, the end sections being welded about the rims to the rims of the terminal intermediate sections.

12. A pressure vessel comprising a plurality oi truncated substantially hemi-spherical shells joined together to form a longitudinally extending series of interconnected spheroids, said shells being secured by joints extending alternately about the large diameter and small diameter ends of said shells, said joints being welded.

13. In a pressure vessel comprising a plurality of interconnected hollow spheroids; a structural element comprising a truncated substantially helm-spherical shell, the large diameter rim and g the small diameter rim of each shell being flanged I inwardly.

HERMANN DEBOR.