US1672061A - Apparatus for cooling metal rods or bars - Google Patents

Description

June 5, 1928. 1,672,061

J. R. GEORGE APPARATUS FOR COOLING METAL RODS OR BARS Filed April 13, 1927 Patented June 5, 1928.

UNITED STATES 1,672,061 PATENT OFFICE.

JEROME B. GEORGE, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO MORGAN CON- SYIBUCTION COMPANY, OF WORCESTER, MASSACHUSETTS, A CORIORATION O! MAB- SACHUSET'I'S.

APPARATUS FOR COOLINGIETAL RODS OR BARS.

Application fled April 13, 1927. Serial No. 188,597.

The present invention relates to' appa ratus for rapidly cooling hot metal stock, such as rods, bars and the like, in order to minimize the. formation of scale on said stock in its passage from the rolling mill to a reel, cooling bed, or other receiving device.

In certain fundamental aspects, the apparatus of the present invention employs the principles that characterize the cooling apparatus of United States Letters Patent of A. '1. Bloom, No. 1,211,277, dated January 2, 1917; the advantages and improvements which it secures are fully set forth in the following detailed description, having ref- 7 erence to the accompanying drawings, in

which- V Fig. 1 is a longitudinal sectional view of apparatus embodying the invention, as up,- plied for example to the cooling of hot rods. Fig. 2 is a face view of one of the units of said apparatus as viewed from the line 22 of Fig. 1. a

Fig. 3 is a. cross sectional view of another 2 of said units, the section being taken on the line 3--3 of Fig. 1.

Fig. 4: is a fragmentary sectional view on the l1ne 4-4 of Fig. 1.

Like reference characters refer to like parts in the different figures.

As set forth in the aforesaid Bloom patent, effective and rapid cooling of the hot rolled product, for the prevention of scale, cannot be obtained by causing it to be merely as pxpssed through or immersed in water.

, hat is required for this cooling is forcible impact of water on the material,--and for this purpose the present invention provides an exceedingly simple, compact and 40 readily-assembled construction, adapted to secure impingment of the water on the hot material, in this case rods, in a plurality of surrounding inwardly-directed jets.

In Fig. 1, showing this construction, the 46 pipe or guide through which the hot rod travels on its way to the reeling devices, not shown, may be parted at any point in its length to provide suitably spaced sections 1 and 2, the section 1, as shown, entering a guide bushing 3, and the section 2 being secured, as by screw threads or the like, to a member or plate 4 which constitutes the forward end or headof the cooling apparatus proper. Said member 4 is centrally apertured at 5 for the passage of the rod into guide section 2. To the said member 4, the several similarly apertured units of the apparatus, which, as hereinafter described, cooperate to produce the impinging water jets, are rigidly secured by a series of bolts 6, 6, here shown as four in number, and serving to bind all the parts together with their apertures in alinement.

Said jet-producing units are supplied in sets of two, a unit 7 and a unit 8, and as many of said sets as desired may be bound into the assemblage with the end plate 4 by the bolts 6, 6. Each unit or member 7, in the form of .a substantially flat annulus pre sents opposite plane surfaces near its o'uter periphery, both front and rear, the former for contact, as shown at 9, with the rear plane surface of end plate 4, and the latter for contact, as shown at 10, with the front plane surface of associated unit 8. As shown at 9, Fig. 1,. the front plane surface of the next unit 7 is drawn into contact with the rear plane surface of unit 8 of the preceding set, and this arrangement of alternating units 7 and 8, throughout the length of the apparatus, is followed for as many sets of said units as may be "desired, two of such sets being shown in Fig. 1, with the guide bushing 3 secured, as by screw threads or the like, to the outside or rear unit 8 of the last set.

Each unit 7 at its central portion, in surrounding relation to the bore for the passage of the rod therethrough, is formed on its front face with an annular projection 11, having a bevelled outer surface or periphery, as shown at 12. On the rear face o. each member 7, the central bore spreads outwardly to form a, circular recess13, whose side walls diverge sufliciently to receive therein an annular projection 14 on the front su face of'the associated member 8. On the rear surface of each member 8, the central bore spreads outwardly to form a recess with diverging walls, as shown at 15, this recess adapted to receive, as shown, the projection 11 of the next member 7; and a recess 15, corresponding to recess 15, is formed centrally of the rear surface of end plate 4 to receive the annular front projection 11 of the first member or unit 7.

The annular surface contacts 9, 9', 10, 10 between the several units thus assembled and drawn into engagement by the bolts 6 serve, as shown, to maintainnarrow annular spaces between the side walls or projections 11 and 14 and the side walls of the recesses 15 and 13, respectively, within which said projections are received. These narrow annular spaces, in surrounding relation to the central bore through which passes the heated rod, are constricted, so as to serve as pressure nozzles for the impingement of annular jets of water on said rod, and to this end,

*each set or pair of units 7 and 8 providing,

as described above, two of such annular nozzles, is adapted to be supplied with water under pressure for jet discharge through said nozzles.

1 As shown in the drawings, each unit 7 provides an annular chamber or space 16, to which water is supplied through a suitable inlet opening 17 formed peripherally of said member. Each member 8 is formed with an annular water space or chamber 18, and the chambers lti'and 1-8 both are open on the front surfaces of the members 7-and 8, re spectively. A seriesof holes 19, 19, provided by each member or unit 7, establish communication between the water chamber 16 of said unit and the water chamber of the associated unit 8, so that the water supplied through the inlet 17 to each member 7 distributes itself, as shown by the arrows on Fig. 1, between the chambers 16 and 18 of two adjacent members or units 7 and 8 of a set.

By the construction above described, the water supplied under pressure to each set or pair of units 7 and '8 is caused to impinge forcibly in a plurality of closely arranged surrounding annular jets, on the hot rod or bar which is moved at high speed through the passage formed by said units, when assemblecl in axial alinement. It is to be understood, of course, that the invention is not confined to the cooling of rods, but is applicable to hot rolled stock of any crosssectional shape, it being obvious that the nozzle-forming portions of the several units can be made to conform substantially to any desired cross-section of stock, so as to deliver surrounding impinging jets of water on all surfaces of said stock in its passage through saideunits. The construction is one that is readily assembled and disassembled, and units may be added or removed at the dis eretion of the operator, depending upon the degree of cooling required. Or, if desired, any of the assembled units may be rendered inoperative, merely by shutting off its individual water supply. The ease with which the apparatus may be disassembled makes it possible to get rid of a cobble or other obstruction in the rod in a minimum of time, and also facilitates cleaning of the ap paratus, and the removal therefrom of any scale accumulation or foreign matter which mayhave been carried to the interior thereof by the cooling water.

Said cooling water, by its tangential entrance under pressure to each annular chamber 16, obtains a whirling motion in said but will deliver said water to the chamber 30 j 18 in such a manner as to maintain said motion. The delivery of water from each new zleis thus maintained. uniform in quantity and velocity all around said nozzle, which is an importantteature, as otherwise the rod 35 would be pushed by the pressure of the water over against one. side or the other'of the passage surrounded by said nozzles.

It is of particular advantage that the jets be closely grouped, as obtained in the prescut construction, as otherwise the cooling effect of the water delivered by a single jet would be largely lost, due to conversion into steam on striking the red-hot rod. Such close grouping is secured with nozzles of accurate construction, having machined surfaces between which the water flows outwardly, by the particularly useful multiple unit construction herein shown, which lends itself to any desired degree of cooling, con- 1 fined to whatever length or lengths the particular conditions may require.

I claim, i

1. In apparatus of the class described, a

plurality of apertured members secured-:to- 10 gether with their apertures in alinement to provide a passage for the movement of hot metal stock, and an annular water chamber in each of said members, each chamber havnarrow annular space between the member containing said chamber and an adjacent member.

2. In apparatus of the class described, a

plurality of apertured members with their apertures in axial alinement,v to provide a passage for the movement of hotmetal stock, each of said members, in the vicinity of said passage, being spaeed'from the mem bers adjacent, to provide a restricted nozzle surrounding said passage, for impinging a jet of cooling'water against said stock.-

3. In apparatus of the class described, a plurality of apertured members with their apertures in axial alinement, to provide a 125 passage for the movement of. hot metal stock, each of said members, in the vicinity of said passagefbeing'spaced from the members adjacent, to provide a restricted nozzle surrounding" said passage, for impinging a The same effect is obtained-in the 7 mg an outlet to said passage through a jet of cooling water against said stock, and

I said members near their outer peripheries being in continuous surface contact, to prevent said cooling, water from flowingout- Wardly between them.

4. In apparatus of the class described, a plurality of annular members with their bores in axial alinement, toprovide a passage for the movement of hot metal stock, a water chamber in each of said members, and each of said members having, in surrounding relation to said passage, an annular projection narrowly spaced from a corresponding recess in the member adjacent,

under ressure to said chamber by tangential deivery thereto, thereby through the whirling motion of said water, to obtain a uniformly distributed flow from said annular nozzle.

6. In apparatus of the class described, a pair of adjacent members each having an annular water chamber in surrounding relation to a passage through said members for the movement of hot metal stock, an annular delivery nozzle from each chamber for impinging an annular surrounding jet of water on the stock in said passage, means for su plying water under pressure to one of said chambers by tangential delivery thereto thereby through the whirling motion of said water, to obtain a uniformly distributed flow from the annular nozzle of said chamber, and a passage connecting said two water chambers, and slanted in the general direction of motion of said water, thereby to produce in the second chamber a similar whirlin motion of the water.

Date this th day of March, 1927.

JEROME R. GEORGE.

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