US2167504A - Cooling of cylindrical bodies - Google Patents

Description

' liiliiiliiiIlII IIIIEIIIIIIIIIIL! 1.1.! 1.! IIIIIIIIIIIII Filed June 9, 1938 I I l I I I I I I I I I I R S GORMAN ET AL COOLING OF CYLINDRICAL BODIES IIIIIIIIIIII III July 25 1939 Ju y 25, 1939. I R 5 ORMA ET AL v 2,167,504 I 1938 2 Sheets-Sheet 2 Patented July 25, 1939 UNITED STATES PATENT OFFICE COOLING OF GYLINDRIGAL BODIES Raymond S. Gorman, Dormont, and Ralph E. Graham, Grafton, Pa., assignors to Cliflord B. Ferree, Pittsburgh, Pa.

Application June 9, 1938, Serial No. 212,746 1 Claim. (01. 266-65 This invention relates to the cooling of cylinin plan from above, and partly in horizontal secdrical bodies of metal, and finds practical applition. Certain parts shown in Fig. I are not prescation in the formation by cooling of a chill upon ent in the showing of Fig. II. Fig. III is a fragthe barrel of a forged steel roll. Its general apmentary view to larger scale, illustrating in side 5 plicability to the formation of chills upon cylinelevation and in vertical section certain details 5 drical bodies will be manifest. The objects in of structure. Fig. IV is a view in section, on the view are quality, depth, and uniformity of chill plane indicated by the line IVIV, Fig. III.

throughout the extent of the cylindrical body. Fig. V is a fragmentary View in horizontal sec- In Letters Patent of the United States. No. tion, illustrating the relative positions of the roll 2,044,384, granted to Clifford B. Ferree, for surface and the spraying apparatus. 10 Method of and apparatus for cooling rolls, a spray A roll l stands on end on a turn-table 3. It

jacket is shown and described. The spray jacket will be understood that this roll has been brought is a double-walled cylindrical shell, of length corto high temperature in a suitable furnace, and responding to or somewhat exceeding that of the has been quickly taken from the furnace and barrel of the roll to be cooled, and of an internal set in centered position upon the turn-table. It 15 diameter such as to receive the roll with small is very hot, and the purpose of the apparatus is clearance. The inner wall of the jacket is perfoto project upon its surface uniformly everywhere rated with a multitude of small, closely set, evena constantly renewed surge of water of uniform, 1y distributed orifices; and from these orifices, and (necessarily) of relatively low, temperature.

when the apparatus is in service, jets of water The apparatus includes, in combination with 20 are projected upon the surface of a hot roll that the turn-table 3, the spraying device. This conhas been brought to place within the jacket, and sists of a cage whose bars 4 extend vertically that stands, rotating upon a turn-table. The and stand in cylindrical assembly, surrounding problem to which the invention of the said Ferthe roll in place on the turn-table. The bars are ree patent is addressed is the problem of fiowhollow, for the conveyance of water; they are 25 ing uniformly over every unit of area of the provided each with a line of orifices 4|, opening surface of the roll barrel, at maximum rate, and toward the roll body; they stand spaced at a at uniform temperature, the cooling stream of uniform interval from the roll body; and they water. are spaced apart, at equal intervals one from It has been found that, in aparticular installaanother. The hollow bars of the cage advan- 30 tion, the chilling effect upon the rolls was not, tageously take the form of lengths of pipe of as had been intended, uniform. Investigation elongate, and specifically of oval cross-section revealed the fact that it was the lower portion (approximating sector shape), set with the major of the roll as it stood within the cooling appa axis in radial position with respect to the. axis ratus that was less perfectly chilled than the of the roll, and with the small end inward. Thus 35 upper portion; and the fact was perceived that, maximum capacity is combined with maximum because of the narrowness of the interval at space interval between cage bars. Conveniently which the jacket was spaced from the roll surthe bars 4 are built into a cage structure that inface, there was a glutting of the way of escape eludes upper and lower headers 46 of annular of the heated water downward, and that, in 0011- form, and to the two headers alike water under 40 sequence, the Withdrawal of heat proceeded at suitable pressure is supplied by appropriate conmore rapid rate at the upper than at the lower nection, as the drawings show. The headers are end. of the roll body. It is to the overcoming of so spaced and arranged that in the assembly the that difliculty, and to the realizing in fullest barrel of the roll is positioned wholly between measure of the benefits and advantages of the them, so that thoughout all its extent the barrel 45 method and apparatus of the Ferree patent of the roll may be played upon by jets from the named above that the present invention is adorifices in the bars. dressed. 'Figs. III and IV serve to show details of suit- In the accompanying drawings Fig. I is a view, able structure. The headers are box-like strucpartly in side elevation, partly in vertical section tures built of plates, and the pipes 5 at their ends 50 of roll-cooling apparatus in which the present (conveniently swedged to circular shape) are invention is embodied. In this figure certain welded in openings of corresponding shape in parts are broken away; and a roll is shown, in the header walls. cooling position within the apparatus. Fig. II Other features shown in the drawings are ciris a fragmentary View of the apparatus, partly cumstantial, merely, and not essential to this 55 invention. The roll is shown to be provided with an axial bore, and a nozzle 5 is provided for projecting a stream of cooling water into the bore. A perforated plug I2 is shown set within the bore at the lower end, whose effect is to cause the water supplied to the bore to over- How and pour over the surface of the upper neck of the roll.

In operation multitudinous jets of water properly distributed impinge upon the roll surface and take up heat. The heated water passes frecly away between the bars of the cage. There is no glutting, no arrest of the escape, no interference by accumulation of hot water with the cooling eflect of the jets, either toward the lower end of the roll or elsewhere. The escaping water falls and may be gathered in a basin 39. Thence it may be carried away through a line 10 and, if desired, after cooling, may be returned again (as by a pump, not shown) through the water supply connection 42.

Water ordinarily will be the cooling medium; manifestly, it suffices that it be a liquid.

We claim as our invention:

Apparatus for applying to a heated cylindrical body of metal an inundating flood of cooling liquid, such apparatus consisting of a cylindrical cage of hollow, vertically extending, spacedapart bars provided with inwardly and radially directed orifices, together with means for maintaining the bars flushed with liquid under pressure, the cage being adapted to surround and to stand at an interval from the surface of the vertically standing cylindrical body to be cooled, the bars of the cage being of oval shape in crosssection and being assembled with the major axes of the ovals extending in radial direction, the parts being so proportioned that quantities of liquid, injected through the orifices and impinging upon the surface of the cylindrical body, pass freely away between the bars, without glutting.

RAYMOND S. GORMAN. RALPH E. GRAHAM.

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