US1663497A - A cokpoeation of dela - Google Patents

Description

March 20, 1928. I

B. P. HAZELTINE METHOD OF PREVENTING OXIDATION OF METAL-PIPE WH-IL'E COOLING Filed April '7, 1926 2' Sheets-Sheet1 INVENTQR March 20', 1928.

' B. P; HAZELTINE METHOD OF PREVENTING OXIDATION OF METAL Pm: WHILE coomue Filed April v. 1926 2 Sheets-Sheet A TOENEY' Patented Mar. 20, 1928.

UNITED STATES PATENT OFFICE.

BEN-THIN P. HAZELTINE, OF WHEELING, WEST VIRGINIA, ASSIGNOR TO WHEELING STEEL CORPORATION, OF WHEELING, WEST VIRGINIA, A CORPORATION OF DELA- WARE.

METHOD PREVENTING OXIDATION OF METAL PIPE \VHILE COOLING.

Application filed April 7,

This invention relates broadly to amethod of reventing the oxidation of metal pipe whi le cooling following the manufacture thereof.

A further object is to provide a method of effecting the cooling of metal pipe wherein the pipe is maintained during the cooling interval in an atmosphere rendered nonoxidizing by gases or vapors which may either be introduced to envelop the pipe or be created, or arise from, the heated pipe itself.

A still further objectis to provide a method of effecting the cooling of the pipe which shall include the exclusion ofatmospheric air from and the maintenance of a nonoxidizing or reducing atmosphere within a chamber, thereby to prevent oxidation of the pipe within said chamber during the interval required to reduce the temperature of the latter below that at which it will readily oxidize upon exposure to the air.

In describin the invention in detail, reference is hereln had to the accompanying drawings, in which Figure 1 is a sectional side elevation of a form of pipe cooling mechanism embodying my invention;

Figure 2 is a horizontal section, reduced, of the casing, showing the enclosed mechanism in top plan;

Figure 3 is a vertical section, reduced, taken on line 33, Fig. 1; and

Figure 4 is an enlarged section on line 4-4, Fig. 3.

Referring to said drawings, 1 indicates a downwardly and forwardly inclined bench having a length approximating that of the pipe that is being manufactured, and to which the len ths of the pipe produced are delivered as t ey are successively advanced through the usual sizing rolls (not shown). Said bench may be mounted in any suitable manner, but is preferably carried upon the upper ends of a plurality of threaded standards 2 which are adjustable vertically in base castings 3 for positioning the bench at a suitable elevation for receiving the advancing lengths of pipe thereon.

Disposed lengthwise of the bench 1 is a pipe holding and releasing device which, as herein shown, comprises a member 4 of reversed trough-like form in cross section normally having its parallel terminal edges 1926. Serial N0. 100,366.

occupying seated relation to the top surface of said bench. In its said normal position, the trough member is adapted to receive bet-ween its substantially parallel sides a length of pipe 5 introduced lengthwise through a therewith alined port 6 provided in an end of a casing 7 which constitutes a chamber-forming enclosure within which said bench 1 and other associated parts of the invention are located; and, additionally, said member 1 serves to guide the so delivered pipe to, and accurately to retain the latter in, horizontal position on the inclined surface of said bench.

Said trough member is formed with a longitudinal web or tin S on the hack thereof, and cast inti-igral therewith at an appropriate point, as approximately midway between the ends thereof is a transverse illl-llltcrsccting sleeve 5) in which is closely titted an arm 10. Said arm is disposed in fixed relation to the substantially horizontal arm 11 oi an angular lever 11 which has its said arm pivotally mounted upon supporting lugs 13 carried on the rear part of the bench 1. Formed onlsaid trough member at intervals throughout its length are arms 14 which are pivotally mounted on other lugs 15 carried by said bench, as shown. A connecting rod or link 16 is interposed between the substantially vertical arm of the lever 11 and a crank arm 17 carried by a suitably journaled shaft 18 which is located outside the casing 7 and which has fixed thereon an operating lever 19. Thus, as is evident, forward and rearward shifting force applied to said operating lever will effect elevation and lowering of the trough member with respect to the seated position thereof shown in. Figs. 1 and4 of the drawings. It will be understood that mechanical means for effecting shit'tim of the trough member may be substituted mthe hand shifting means shown and described.

Located within the cooling chamber formed by the provision of the casing 7 is a continuously traveling pipe conveyor comprising a plurality of endless conveyor chains 20 carried by pairs of sprocket wheels 21, said chains having fixed thereon at equidistant intervals upstanding posts 22 and adjacent posts. being adapted to receive t-herebetwe'en a single pipe. The posts of the various chains embodied in the conveyor are so arranged that they form rows parallel to the -front end of the bench 1. Said edge overlies the adjacent end of the conveyor, and, thcretorc, as successive lengths of pipe, delivered to the bench as aforesaid, are rele od, they roll down the inclined surface of said bench and drop from the latter to a space between two alined rows of posts of said conveyor. Obviously, successively released pipes are thus delivered to different spaces and are maintained out of contact with one another by the space-separating rows of posts.

Pipes delivered to the conveyor are advanced on the latter and, as the conveyor chains 20 pass downward over the forward sprocket wheels 21, roll oil the posts 22 of the row next in advance thereof to and through a horizontal opening or passages 23 provided in an amn'opriate position in the casing, thence roll down over the inclined top surface of a suitable shelf or apron 24 and are delivered by gravity to a second conveyor located without the casing, as shown,

sa d second conveyor comprising endless traveling chains 95 carried by sprocket wheels 26. The chains carry posts 27 having an arrangement corresponding to the posts of the first mentioned conveyor. Said second conveyor may lead to any suitable delivery location.

The casing 7 is designed to confine a cooling medium which may consist of the gases and vapors arising from the heated pipes passing therethrough, or live steam introduced within the casing. Enveloped by such cooling medium, the pipe is cooled rapidly in an atmosphere from which is excluded atmospheric air, thereby preventing excessive oxidation and scale formation.

What is claimed is- 1. The method of handling metal pipe to prevent excessive oxidation while cooling, which consists in conveying the lieaited pipe to and through an enclosed chamber from which atmospheric air is excluded, and maintaining said pipe in the non-oxidizing at niosphere of said chamber while cooling it to a point below that at which oxidatixm occurs, said atmosphere being created by steam within said chamber.

52. The method of handling metal pipe to prmient cXce,. ..1ire oxidation thereof while cooling, which consists in conveying the heated pipe to and through an enclosed chamber from which atmospheric air is excluded, and maintaining said pipe in a nonm-zidizing atmosphere created by steam within said chamber until the pipe has cooled to a point below that at which oxidation oc curs.

3. The method of handling metal pipe to prevent excessive oxidation while cooling, which consists in conveying the heated pipe to and through an enclosed chamber from which oxidizing atmosphere is excluded, and controlling the rate of travel of said pipe through said chamber to the extent that the pipe is maintained in a non-oxidizing atmosphere created by Water vapor until it has become cooled to a point below that at which o;-;idution occurs.

In testimony whereof, I affix my signature.

BENJAMIN P. HAZELTINE.

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