US2737174A - Furnace radiator mounting - Google Patents

Description

United States Patent FURNACE RADIATOR MOUNTING James H. McQueen, Indianapolis, Ind., assignor to Hall- Neal Furnace Company, Indianapoiis, had, a corporation of Indiana Application May 20, 1953, Serial No. 356,260 4 Claims. or. 126-118 This invention relates to a heat radiating structure to be manufactured separately from and applied to a heating furnace such as the warm air type of furnace. A primary object of the invention is to provide a structure which may be preformed and handled in a linear form and sent to the job for installation about a cylindrical combustion chamber such that there Will be intimate contact with the radiating structure by the combustion chamber wall.

Heretofore there have been many forms of fin radiating structures devised to be applied and mounted around the outside of the combustion chamber wall, but one of the great problems has been to get such an intimate contact between the radiating structure and the combustion wall chamber as to permit an actual intimate contact between the radiating structure and that wall for high conduction or heat from the Wall into the radiating structure.

Costs of course must be kept at the lowest possible level, and therefore the radiators to be applied to heating furnaces have to be made at a relatively low cost so as to insure their usage over and above the use of a combustion chamber wall depending entirely upon its cylindrical surface alone for heat conduction.

The present invention embodies the concept of forming a fin type radiator in a linear manner wherein fins are applied to a planar sheet of metal, and then when the assembly is taken to the furnace, it may be readily curved around the cylindrical wall of the combustion chamber and drawn up snugly thereagainst so that all of the fins in the structure will be in intimate contact along certain Zones thereof, this contact being effected by means for applying tension to the wall carrying the fins so as to drive these fins against the wall and hold them compressively thereagainst.

In addition to the above indicated objects and advantages of the invention, many additional ones will become apparent to those versed in the art in the following description of one particular form of the invention as illustrated in the accompanying drawing, in which:

Fig. 1 is a view in top plan of a structure embodying the invention;

Fig. 2 is a view in side elevation and partial section;

Fig. 3 is a view in top plan of a fin radiator structure before applying to the furnace;

Fig. 4 is a detail in vertical section on the line 4-4 in Fig. 1; and

Fig. 5 is a detail on an enlarged scale in vertical section on the line 5--5 in Fig. 2.

The invention is herein illustrated and described as being applied to a conventional type furnace employing a cylindrical combustion chamber and having a radiating drum 11 through which the products of combustion are circulated and eventually taken out through the stack pipe 12.

A radiator structure is initially formed by fixing a pin rality of fins 13 to a sheet of metal 14. The metal 14 is initially in planar form, so that the fins 13 may be attached thereto and extend throughout its vertical height.

End portions of the metal plate 14 are turned therefrom substantially at right angles thereto to form the end fins 15 and 16 respectively, Fig. 3, and each of these fins 15 and 16 have their outer ends bent over to form the respective flanges 17 and 18 which are in substantial parallelism to the plate 14.

Each of the fins 13 is formed to have a foot 19 which is employed as the means for securing therethrough the fin 13 to the plate 14, such as by spot welding. The fin 13 in each instance is also provided with a foot 20, herein shown as turned from the opposite side of the fin 13 in each instance in respect to the foot 19, this being for a matter of convenience in giving ready access to the foot 19 in the spot welding procedure. As indicated, these fins 13 are spaced at regular intervals along the plate 14 between the end fins 15 and 16.

The fins 13 in each case adjacent to the end fins 15 and 16 are interconnected with those end fins at their upper end portions by a rod or bolt 21 and 22 respectively.

On the side of the metal sheet of plate 14 reverse from that to which the fins 13 are attached, and at the lower corners thereof in respect to the location of the rods 21 and 22, there is fixed to each corner portion respectively a flexible metal strap 23 and 24, these straps 23 and 24 being readily bendable. Straps 23 and 24 may be attached to the plate 14 by any suitable means, such as by spot welding.

The assembly of the radiator structure thus far de. scribed is made to have a length such that when it is applied to the combustion chamber wall 10, and carried therearound, it will cover substantially the side wall between the ends of the radiator drum 11. The combustion chamber wall 10 is provided with a pair of radiator support brackets 25 and 26 adjacent the ends of the drum 11, and so located as to receive the bolts or rods 21 and 22 thereover when the structure is bent around the combustion chamber wall 10, this condition being achieved by bending the wall 14 with the feet 20 of the fins 13 resting against the member 10. In the form herein shown, the vertical height of the plate 14 is substantially equal to the vertical height of the drum 11.

In order to bring the feet 20 of the fins 13 as well as the feet 17 and 18 of the end plate fins 15 and 16 into intimate contact with the wall It), the straps 23 and 24 are carried between the wall 10 and the brackets 27 and 28 which are fixed on the drum 11. These straps 23 and 24 are respectively pulled between those brackets and the wall 10 as far as they may be carried and then are bent around over the brackets and into the folded conditions where the end parts 38 and 29 overlap the straps between the brackets 27 and 28 and the plate or sheet 14, the sharp angular bend of these straps about the brackets 27 and 28 being sufficient to prevent their slipping and allowing the plate 14 to retract from that position which causes the feet 20 to be compressively engaged against the wall 10 as is best indicated in Fig. 1. 7

By this method of pulling the sheet 14 around as tightly as possible to insure contact of the feet 20 against the Wall 10, that contact is maintained throughout the life of the furnace particularly in view of the fact that during heating operations when the radiating structure is actually effective, the wall 10 will be quite hot, and will of course be expanded from its original condition when the radiator was originally applied in the erection of the furnace, and therefore that compressive engagement of the feet 20 of the fins 13 will be tended to be increased rather than decreased, so that in actual operation an extremely effective radiating effect is obtained.

It is to be noted of course that by the formation of the radiator composed of the plate 14 and the fins 13 extending vertically throughout its length, there are providcd a plurality of flucs 30 between adjacent fins 13 as well as the end fins and 16. This flue" action of course tends to accelerate flow of air across the surface of the combustion wall 10, as well as across the surfaces of the radiating fins 13, all tending to heat the air as quickly and as efficiently as may be possible underthe conditions of such a structure.

The brackets and 26 carry the vertical load of the radiator through the bolts or rods 21 and 22, and the straps 23 and 24 insure the physical, intimate compressive contact of the fins 13 through their feet 20 with the wall 10.

Therefore, it is to be seen that I have provided an extremely simple and yet most effective heat radiating structure for application to heat radiating surfaces, and while I have described the invention in the one particular form, it is obvious that structural variations may be employed without departing from the spirit of the invention, and I therefore do not desire to be limited to that precise form beyond the limitations which may be imposed by the following claims.

I claim:

1. In a furnace, the combination with a furnace curved heating radiator wall, of a metal sheet carried circumferentially around a part of said wall; a plurality of spaced apart fins between said wall and said sheet extending approximately radially from abutment with the wall into abutment with and secured to said sheet; means vertically suspending the sheet and fin assembly by its upper end portion along said wall; and means urging the lower portion of said assembly toward said wall to maintain said fins in intimate contact with said wall, said last means comprising a length of a flexible member secured by one end to a lower end portion of said assembly extending therefrom by a length; and a bracket carried in fixed manner by said furnace adjacent to and beyond said assembly end portion, around which bracket said member length is reversely bent under tension as both a radial and circumferential retaining means.

2. The structure of claim 1 in which there is a second flexible member secured to the assembly at its other lower end portion, and a second bracket carried by the furnace spaced circumferentially from said second end; said sec ond flexible member reversely bent under tension around the second bracket as a radial and circumferential holding means, whereby said assembly is tended to be stretched between said two flexible lengths and maintained under tension against said wall therebetween.

3. The structure of claim 1 in which said bracket has a post and in which said flexible member is a metal strap and is bent around the post of the bracket by a sharp reverse U bend to retain the strap under tension between the bracket and said assembly.

4. In a furnace, the combination with an arcuate length of a furnace wall; a fin radiator assembly comprising a plurality of spaced apart fins and an outside enclosing plate, said fins being disposed normally of said plate with one edge portion of each fin secured to said plate, said last named fin edge portions being substantially parallel to each other; a pair of straps relatively narrow in respect to the height of said plate and fixed by one end eachto end portions of said assembly; said assembly being wrapped around said wall with ends of said fins abutting the wall and the fins spacing the plate from the wall; a pair of brackets carried by the furnace one circumferentially spaced apart from the other around said wall length and adjacent each of said assembly ends; and said straps being pulled in opposite directions one from the other and bent sharply over each of said brackets in approximate U shape maintaining the intervening assembly compressibly against said wall.

References Cited in the file of this patent UNITED STATES PATENTS 1,680,907 Nevel Aug. 14, 1928 1,716,083 Neal June 4, 1929 1,942,211 Hartwig Jan. 2, 1934 2,161,477 Holmes June 6, 1939 2,191,349 Lengyel Feb. 20, 1940 FOREIGN PATENTS 707,514 France Apr. 14, 1931 645,280 Germany May 25, 1937

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