US2366088A - Pipe heating furnace - Google Patents

Description

.1. L. cooDY PIPE HEATING FURNACE Filed April 27, 1944 Dec. 26, 1944.

Sheets-Sheet l Johh A600 INVENTOR Dec. 26, 1944. l .1. COODY PIPE- HEATING FURNACE Filed April 27, 1944 2 Sheets-Sheet 2 Jab/7 50004 /M Patented Dec. 26, 1944 l" pipe sections around a form.

NITED-S A s PAT :Prer: HEATING FURNACE 1 a John Goody, Tulsa, Okla... Application April 27, 1944, Serial No. 532,989 3 The invention relates to pipe heating furnaces, particularly adapted for heating pipejsctions of large diameter,- preparatory to placing the pipesections onfa bendingtabIe for bending the A further object is to provide a pipe section heating furnace, through which furnace at plurality of pipe "sections are progressively moved to a discharge point wherethe pipe sections are -removed as needed for the bending operation.

j A further object is to-provide trackways at opposite sides of the furnace and extending; en-

tirely across the furnace and shoes in said trackway for supporting thepipe ends in spaced relation so that the p'roductsof combustion within the furnace will pass entirely around the jportions of the pipe sectionsywithin the furnace. 1

Also to inclinethe trackways so that the pipe sections will move by gravitytowards the discharge side of the furnace. in

A further object is to provide thedischarge side of the furnace between the trackways with filler members so that the lower pipe section will act. as a seal against escapeof gasesfromthe,

furnace. i

A further object is to provide the lower portion of the furnace with a transverse supporting memberengaging the lower sides of the pipe sections between the trackways for preventing sagging of the pipe sections, incident to the heating thereof.

A further object is heating furnace through which pipe sections, to be heated, will move by gravityfrom a pipe feeding position to a pipe discharge position, on the opposite side of the furnace. l

With the above and otherobjects in view the invention resides in the combination and arto provide a pipe section rangement of parts as hereinafter set forth,

shown in the drawings, described and claimed, it being understood that changes" in the precise embodiment of theinventionmay bemadewithin the scope of what is claimed without departing from the spirit of the invention.

In the drawings:

Figure 1 is a perspective view of the furnace, 1

the combustionchamber 2 through a bumer 3,

and the products of combustion pass upwardly into the chamber 4 of the dome section 5 of-the furnace, and then outwardlythrough the flue 6 tothe atmosphere, y I

The dome section 5 is rigidly supported, up-

wardly spaced, from the lower section I by the rigidiarms I carried by the stationary uprights 8 and, by the downwardly extending: armsil; the lower ends of the arms fl beingconnected to the "oblong shaped frame I Il,*formed' fromjangle iron,

therefore it willbe seen that the dome is rigidly supported at all'times. I

The end bars I I of the frame Ill are formed from channel iron to form guides in. which the I refractory pipe holding spacer members I2 are guided; there being similarly shaped channeled members I3 carried by the endsof the furnace section I for guiding jthelower spacer blocks 12.

The bars I3 extend beyondthe rear side: of the furnace, clearly shown in Figure 2', so,,that pipe I sections I4 can be assembled in the spacer blocks to the rear of the furnace, and asthe guide chan- ,nels I I and I3 incline downwardly and forwardly, it will beseen that the pipe sections will be progressively fed downwardly and forwardly through the combustion chamber 2 to, the forward side of the furnace by gravity. The lower forward ends of the guide channels I3 terminate in upwardly extending stop arms l5 and by referring to Figure 2, it will be seen that when, the pipe section III, shown in dotted lines, has been heated the upper spacerblock I2 can be removed,

then the pipe section removedfor a bending operation on a bending table; after which the lower block I2 is removed and thenall of the block sections, with the pipe sections therein,will

feed downwardly by gravity so that the next pipe section, which has been previously heated, is"

in position to be removed, for bending purposes, I

It willbe noted that the lower section of pipe will cool some on its outer side and this cool side is placed against the form around which the section is bent, hence will be free of wrinkles incident to the bending operation while thehot outer side will be ductile and will easily stretch} and will be free of wrinkles. The type of bending machine is disclosed in my co-pending application, Serial Number 532,988, filed April 27,

1944. It will be notedthat the lower pipe section I4 substantially closes the space between the dome and the base at the point of discharge, I thereby preventing excessive loss of heat during the heating operation. I I I l p It has been found desirable to support the ENT! OFFICE pipe sections I4 within the furnace intermediate their ends to prevent sagging of the sections and to accomplish this result a Water cooled upwardly inclined supporting member [6 is provided. Member Hi engages the under sides of the pipe sections l4, consequently the pipe sections are maintained straight at all times. A circulation of water may be maintained through the sup port I6 by means of a water supply pipe l1, and a discharge pipe I8. It will be noted that the ends of the pipe sections l4 extend beyond the ends of the furnace, and the heating is centrally of the sections where the bend is to take place. The furnace is particularly adapted for bending pipe of large diameter, as high as 24 inches, which is quite common around refineries.

The spacer members, l2 are provided with arcuate recesses l9 conforming to the cross sectional shape of the pipe, however they are preff erably spaced asat 20 to take care of expansion and contraction.

a From the above it will be seen thata pipe heating furnace is provided which is simple in construction and one through which pipe sections are progressively fed by gravity to the point of discharge.

The invention having been set forth what is claimed as new and useful is:

1. A furnace for heating pipe sections, said furnace comprising a lower base section having a combustion chamber therein, a dome section above the base section in spacedrelation thereto; transversely extending downwardly and forwardly inclined spacer block trackways carried by the base section and the dome section, separable spacer blocks mounted in said trackway for the-reception of opposite ends of pipe sections, said pipesections and spacer blocks moving by gravity through the combustion chamber from the rear side of the furnace to the forward discharge side as the pipe sections and spacer blocks at the discharge side are removed from the trackways.

2. A device as set forth in claim 1 including a pipe section sag brace extending through the furnace in engagement with the under sides of the pipe sections. I

3. A device as set forth in claim 1 includinga brace extending through the combustion chamber in engagement with the under side of the pipe sections, and means for cooling said sag brace.

4. A device as set forth in claim 1 wherein the lower spacer block guides extend beyond the rear side of the furnace, thereby allowing the assembling of spacer blocks and pipe sections to the rear of the'furnace to be fed through the furnace as pipe sections are removed from the discharge side of the furnace.

5-. A device as set forth in claim 1 including stop members in the path of the spacer blocks at the discharge side of the furnace for limiting the lower pipe section to the. dischargepoint outside the furnace. v p I 6.. A device as set forth in claim Lwhereinthe spacer blocks are formed from refractory matesubstantially formclosuresfor the space between thefurnace section at the rear and forward sides of the furnace thereby preventing excessive loss of products of combustion.

JOHN L. COODY.

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