US1994360A - Soap chilling roll - Google Patents

Description

March 12, 1935.

A. 0. HURXTHAL SOAP 'CHILLING ROLL s Sheets-Sheet 1 Filed Oct. 6, 1951 mmllllllla March 12, 1935.

A. 0. HURXTHAL SOAP CHILLING ROLL Filed Oct. 6, 1931 5 Sheets-Sheet 2 5g @1117 fig? Mmh 12, 1935.. A0, H RXTHAL 1,994,360

SOAP CHILLING ROLL Patented Mar. 12, 1935 PATENT OFFICE SOAP CHILLING ROLL Alpheus 0. Hurxthal, Philadelphia, Pa., assignor to Proctor & Schwartz, Incorporated, Philadelphia, Pa., a corporation of Pennsylvania Application October 6, 1931, Serial No. 567,316

8 Claims. (Cl. 257-95) This invention relates to chilling rolls of the hollow cylindrical type commonly employed for the purpose of chilling soap and similar materials which are intended to beapplied, while in a more or less plastic state, in a layer, having a substantially uniform thickness, on the peripheral surface of the roll, in order that the material may be readily chilled and solidified to an extent that will permit the material to be 'sebsequently removed from the peripheral surface of the roll in the form of chips, by suitable scraping mechanism co-operating with the roll. Such rolls usually are of a relatively large size, for example, a typical roll may have a diameter of about 24 inches, more or less, and a length of about '72 inches, more or less. These rolls are usually mounted for rotation about a horizontally disposed axis,- being supported entirely by bearings arranged at opposite ends of the rolls respectively. The material to be chilled is usually applied to the peripheral surface of the chilling roll by means of a relatively small roller located near the top of the chilling roll and having its axis arranged substantially parallel to the axis of the chilling roll and its peripheral surface spaced from and theoretically parallel to the peripheral surface of the chilling roll, the distance between the peripheral surfaces of the two rolls determining the thickness of the layer of material to 30 v be applied to the chilling roll.

Heretofore hollow chilling rolls have been completely filled, or at least half filled, with water,

for the purpose of cooling the material-carrying surface of the roll. The presence of such large quantities of liquid causes the roll to sag at its center.

sagging of the chilling roll intermediate its ends, while the press roll remains straight, causes the thickness of the layer of material to vary in a 40 layer of material being thicker at and adjacent the center of the face of the chilling roll, where the greatest sa ging occurs, than at and adjacent to the ends of the chilling roll, where little or no sagging of the chilling roll occurs. Consequently when the material is subsequently broken up into chips, the chips coming from the portions of the chilling roll adjacent the ends thereof will be thinner than those coming from the center and other intermediate portions of the face of the chilling roll.

Another objection to the use of a large volume of water in the chilling roll is that the water in the roll, by absorbing heat from the material being chilled on-the peripheral surface of the chilldirection across the face of the chilling roll, the

ing roll, attains a higher temperature than the freshwater entering the chilling roll. Consequently, the fresh water,upon entering the chilling roll and mixing with the water already in the chilling roll, loses a considerable percentage of its 5 efficiency as a cooling medium for the chillin roll, due to the fact that the larger body of water in the chilling roll immediately absorbs the relatively small amount of fresh water entering the chilling roll, thereby neutralizing the tempera- 10 ture of the fresh water without materially lowering the temperature of the body of water contained within the chilling roll.

In order to overcome these objections, some manufacturers have resorted to the practice of 15 placing a supplementary cylinder within the chilling roll, the supplementary cylinder, as a rule, being arranged in axial alignment with the chilling roll for the purpose of reducing the volume of water in the chilling roll and at the same time 20 holding the reduced volume of water in contact with the inner surface of the peripheral wall of the chilling roll. In such cases the water is fed into the space between the outer surface of the supplementary cylinder and the inner surface of 25 the chilling roll, at one end of the chilling roll, while a corresponding amount of water is discharged from the opposite end of the chilling roll.

. This arrangement is likewise open to objection in that the chilling roll is maintained at a relatively lower temperature at the inlet end than at its opposite end where the surplus water is discharged.

Consequently, the. material on the outer surface of the chilling roll chills more rapidly at and adjacent the inlet end than it does at the dis- 5 charge end of the chilling roll.

The relatively small flow of fresh water into the large body of water within the chilling roll in either case is unable-to create a circulation of sumcient velocity to effect, efliciently, the transfer 40 of heat from the roll to the water, it being a well established fact in the art that the velocity of water with respect to the peripheral'surface of the chilling roll has a decided effect upon the emciency in transferring the heat from the chilling roll to the water. 7

The object of this invention is to provide a cooling system for "chilling rolls which will be free from each and all of the objections above noted. First, by eliminating the necessity for a large volume of water in the chilling roll, which, as above noted, causes the roll to sag. Secondly, by spraying the cooling medium against the inner surface of the peripheral wall of the chilling roll from one end of the roll to theopposite end thereof, whereby all points across the inner surface of the peripheral surface of the roll will simultaneously receive the cooling medium at the same temperature. Thirdly, by spraying the cooling medium against the inner surface of the peripheral wall of the chilling roll a high velocity of the cooling medium relative to the wall is obtained, thus the transfer of heat is increased to maximum. Fourthly, by spraying the cooling medium against the peripheral wall substantially tangentially with respect to the said wall and at a plurality of places spaced circumferentially of the said wall a whirling layer of water or other cooling medium is maintained in contact with the inner surface of the said peripheral wall of the chilling roll and the whirling of the cooling medium is accelerated at each of the places where the spray impinges upon the inner surface of the peripheral wall of the chilling roll, thereby maintaining the high velocity of. the cooling medium with respect to that portion of the peripheral wall of the chilling roll which carries the material from the press roll to the scraping means.

The construction and operation of the apparatus will be fully disclosed hereinafter, reference being had to the accompanying drawings, of which:

Figs. 1 and 2 are respectively a plan and side elevation of a chilling apparatus constructed in accordance with the principles of this invention;

Fig.3 is a transverse sectional elevation of the chilling roll, taken on the line 3-3, Fig. 1;

Fig. 4 is a. longitudinal sectional elevation of the chilling roll, taken on the line 44, Fig. 3; and

Fig. 5 is an enlarged transverse sectional elevation of one of the spray pipes, the section being taken on the line 55, Fig. 4.

Referring to Figs. 1 and 2 of the drawings, the chilling roll 1 is provided with trunnions 2 and 3 which are rotatably mounted in bearings 4 and 5 respectively carried by supporting frames 6 and 7 respectively.

Secured to the trunnion 3 is a gear wheel 8 which meshes with a pinion 9 that is secured to a shaft 10 supported in suitable bearings formed in the end frames 6 and '7 respectively. To the opposite end of the shaft 10 is secured a sprocket or other drive wheel 11, around which passes a chain or other power-transmitting belt 12. The drive belt 12 also passes around a small driving wheel 13 secured, in the present instance, to the armature shaft of an electric motor 14.

Disposed in substantially parallel relation to the axis of the chilling roll 1 is a press roll 15 which receives the material to be chilled from a hopper 16, the press roll 15 and the hopper 16 being supported in any suitable manner whereby the peripheral surface of the press roll 15 may be set at any desired distance from the peripheral surface of the chilling roll 1.

The material to be chilled passes from the hopper 16 onto the peripheral surface of the press roll 15 which transfers the material to the peripheral surface of the chilling roll 1. The material is carried by the chilling roll for a sufllcient length of time to permit the material to become chilled and solidified prior to its being scraped or otherwise removed by a suitable scraping or chipforming mechanism, not shown, which normally is disposed about beyond the point at which the material is applied to the peripheral surface of the chilling roll.

Referring now to Figs. 3 and 4 of the drawings,

the chilling roll 1 comprises a relatively thin peripheral wall 20 which is provided with inwardly extending end flanges 21 and 22 respectively. The

peripheral wall 20 is also provided with a series of inwardly extending annular reinforcing ribs 23, 23 which are spaced longitudinally of the chilling roll 1 intermediate the end flanges 21 and 22 thereof.

Secured to the end flange 21 is a head 24 from which projects the trunnion 2, the trunnion, in the present instance, being illustrated as an integral part of the head 24. Secured to the end flange 22, at the opposite end of the chilling roll 1, is a head 25, from which projects the trunnion 3.

The trunnions 2 and 3 are provided with axially extending aligned openings 26 and 27 respectively, through which extend feed and discharge pipes 28 and 29 respectively, suitable bearings being provided in the trunnions, as at 30 and 31, for suitably supporting the pipes 28 and 29 with respect to the trunnions 2 and 3 respectively. Suitably packing glands 32 and 33 are provided at the outer ends of the trunnions 2 and 3 respectively for preventing any passage of the cooling medium to or from the interior of the chilling roll 1, except through the pipes 28 and 29 respectively.

On the inner ends of the feed and discharge pipes 28 and 29 are secured manifolds 34 and 35 respectively. Extending radially from each of the manifolds 34 and 35 is a series of hollow spokes in the present instance having the form of pipes 36, 36, which are tapped into and communicate with the hollow centers of the manifolds 34 and 35, said manifolds being connected by a duct, in the form of a pipe 37, which is disposed in axial alignment with the axis of the chilling roll 1 and communicates at its opposite ends with the hollow centers of the manfolds 34 and 35 respectively.

At the outer ends of g the hollow spokes 36, 36 are fittings 38, 38, which respectively support the opposite ends of spray pipes 39, 39, which extend longitudinally of the roll 1 at a. predetermined distance from the inner surface of the wall 20 of the roll 1, the spray pipes 39 being capped at their oppositeends as indicated at 40.

In each of the spray pipes 39 is a series of spray nozzles 41, 41 which-are disposed in spaced relation to each other in a direction longitudinally of the chilling roll 1, the sprays from the series of nozzles flaring and impinging upon the inner surface of the wall 20 of the roll 1 in a manner to form substantially continuous unbroken line of cooling medium in a direction longitudinally of the chilling roll, so that the inner surface of the said peripheral wall 20 receives the same amount of cooling medium at a uniform temperature at one time, substantially from end to end of the roll 1, the cooling medium entering the inlet pipe 28, passing into the manifold 34, through the duct 37, into the manifold 35, thence through the hollow spokes 36, 36 of the manifolds 34 and 35 into the opposite ends of the spray pipes'39, 39 simultaneously, thence through the spray nozzles 41, 41 carried by each of the spray pipes 39.

Formed in the manifold 35 is an exhaust chamber 45 with which the discharge pipe 29 communicates. Also communicating with the exhaust chamber 45 is a depending pipe 46 which, through a suitable fitting 47, communicates with one end of an exhaust pipe 48 which is disposed in the lower portion of the horizontally disposed chilling roll 1, the exhaust pipe 48 'being perforated or provided with a longitudinally extending slot through which the cooling medium, at the lowest point of the horizontally disposed cylinder 1, passes into the said exhaust pipe 48. The opposite end of the exhaust pipe 48 is supported from the manifold 34 by means of a spoke 49 which may be in the form of a pipe secured in a blind tapping 50 formedin the manifold 34, in order that the pipe 49 will receive no incoming water from the manifold 34.

Connected to the inlet pipe 28 is a feed pipe 51 which is connected to a high velocity pump 52, the pump 52 being fed by a suitable inlet pipe 53 from any suitable source of supply of cooling medium. The pump 52 in the present instance is shown as being driven by an electric motor 54.

Connected to the discharge pipe 29 is an outlet pipe 55 which is connected to a discharge pump 56, in the present instance illustrated as being driven by a tight pulley 5'7, a loose pulley 58 being arranged adjacent the tight pulley 57 for the purpose of stopping the discharge pump 56 as desired.

Obviously, the discharge pump 56 may be driven by an independent electric motor, if desired, or the motors 14 and 54 may be eliminated and tight and loose pulleys substituted therefor which may be operatively connected to a common drive shaft together with the pulleys 5'7 and 58 of the discharge pump 56.

With this arrangement of piping the spraying mechanism including the pipes 28, 29, manifolds 34 and 35, spray pipes 39, and exhaust pipe 48 are held stationary, while the chilling roll 1 rotates at a speed which will permit the material, carried by the peripheral surface thereof, to become chilled while traveling between the press roll 15 and the scraping mechanism as above noted.

Obviously, the spray nozzles 41 may direct the cooling medium radially with respect to the axis of the roll, but in order to provide a whirling layer of cooling medium in contact with the inner surface of the peripheral wall of the chilling roll the spray nozzles 41, as indicated in Figs. 3 and 5, are arranged at a slight angle with respect to the axis of the chilling roll and beyond each of the spray pipes 39 a deflector 60 is provided which, in the present instance, extends the full length of the spray pipes 39 and is secured to the spray pipe by means of bolts 61, as shown in Fig. 5, the deflector 60 intercepting the spray from the nozzles 41 and deflecting it in the manner illustrated in Fig. 3, so that the spray will impinge upon the inner surface of the peripheral wall of the chilling roll 1 substantially tangent to said peripheral wall.

Due to the high velocity at which the spray impinges against inner surface of the peripheral wall 20 of the chilling roll 1, the cooling medium will be caused to whirl about the axis of ,the roll in contact with the said inner surface of the peripheral wall 20 of the roll 1. Obviously, the provision of a plurality of spray pipes 39 at circumferentially spaced points with respect to the chilling roll 1 causes an acceleration of the whirling layer of cooling medium at each point where the succeeding sprays impinge upon the said inner surface of the peripheral wall of the chilling roll, such circumferentially spaced sprays also supplementing the whirling layer of cooling medium with fresh cooling medium which maintains the temperature of the whirling layer substantially uniform. The high velocity of the whirling layer of cooling medium in contact with andwithrespect to the inner surface of the peripheralwall 20 eflects a rapid transfer of the heat from the said wall 20 which has been absorbed by said wall from the materialcarried by the outer peripheral surface thereof.

Obviously, by rotating the spray pipes 39 within the fittings 38, 38, which support these pipes at their opposite ends, the angle at which the nozzles 40 deliver the cooling medium may be varied to any desired extent and by the elimination of the deflectors 60 these nozzles 41 may be caused to direct the spray radially with respect to the axisof the roll 1. Obviously, by rotating the spray pipes 39 with respect to each other the sprays delivered by the different nozzles 41 may be concentrated at any desired place on the inner surface of the wall 20, or concentrated at one place and separated at other places with respect to the inner surface of the wall, in order that the peripheral wall of the roll may be maintained at the uniform temperature throughout its material-carrying segment of movement.

In the present instance, the sprays from the nozzles 41 are directed in the direction in which the chilling roll 1 is rotating, but obviously this condition may be reversed if desired and thereby increase the velocity of the cooling medium relative to the peripheral wall of the chilling roll.

I claim:

1. The combination of a hollow chilling roll, a series of pipes disposed substantially parallel to the axis of said roll and in spaced relation circumferentially of said roll, a series of spray nozzles in each pipe and spaced longitudinally of the roll, and a deflector carried by each pipe and extending across the path of the spray from each nozzle in predetermined fixed relation to said nozzle and to the curvature of the inner surface of the peripheral wall of the roll for deflecting said spray substantially tangentially with respect to the peripheral wall of the roll.

2. The combination of a hollow chilling roll arranged with its axis disposed horizontally, a series of spray pipes in and extending longitudinally of said roll in cireumferentially spaced relation to each other, a manifold adjacent each end of the roll, radially extending hollow arms respectively connecting the opposite ends of the spray pipes with said manifolds for supporting and simultaneously feeding each spray pipe inwardly toward its center from the opposite ends thereof, a pressure equalizing fluid conduit connecting the said manifolds, and a feed pipe connected to the circuit including the manifolds and the pressure equalizing conduit and axially aligned with said roll and extending outwardly from one end of said roll for feeding the manifold adjacent the said end of said roll.

3. The combination of a hollow chilling roll arranged with its axis disposed horizontally, a series of spray pipes in and extending longitudinally of said roll in circumferentiaily spaced relation to each other, an exhaust pipe extending longitudinally of andin the lower portion of the roll, a manifold adjacent each end of the roll for supporting and simultaneously feeding each spray pipe at the opposite ends thereof, a conduit connecting the said manifolds, means axially aligned with the axis of said roll and extending outwardly from one end of said roll for feeding the manifold adjacent the said end of said roll, means for supporting said exhaust pipe from said manifolds, and means axially aligned with the axis of the roll and extending outwardly from the opposite end of said roll and connected to said exhaust pipe for discharging the fluid from said roll.

4. The combination or a hollow chilling roll, trunnions extending outwardly from the opposite ends of the roll respectively, means for rotatably supporting the trunnions in a horizontal plane, a series of spray pipes in and extending longitudinally of said roll in circumferentially spaced relation to each other, a manifold adjacent each end of said roll and connected to the opposite ends of the spray pipes respectively, a duct connecting said manifolds, a feed pipe axially aligned with and extending outwardly through one of said trunnions and connected to one of the said manifolds, a discharge pipe axially aligned with and extending through the other of said trunnions and connected to an exhaust chamber in the secend of said manifolds, and an exhaust pipe having an intake located adjacent the lowest portion of said roll and connected to the said exhaust chainher.

5. The combination of a hollow chilling roll, trunnions extending outwardly from the opposite ends of the roll respectively, means for rotatably supporting the trunnions in a horizontal plane, a series of spray pipes in and extending longitudinally of said roll in circumferentially spaced relation to each other, a series of spray nozzles in each spray pipe and in spaced relation longitudinally oi the roll, a manifold adjacent each end of said roll and connected to the opposite ends of the spray pipes respectively, a duct connecting said manifolds, a feed pipe axially aligned with and extending outwardly through one of said trunnions and connected to one of the said manifolds, a discharge pipe axially aligned with and extending through the other of said trunnions and connected to an exhaust chamber in the second of said manifolds, and an exhaust pipe having an intake located adjacent the lowest portion of said roll and connected to the said exhaust chamher.

6. The combination of a hollow chilling roll, trunnions extending outwardly from the opposite ends of the roll respectively, means for rotatably supporting the trunnions in a horizontal plane, a series of spray pipes in and extending longitudinally of said roll in circumferentially spaced relation to each other, a series of spray nozzles in each spray pipe and in spaced relation longitudinally of the roll, a deflector carried by each spray pipe and extending into the line of spray from each nozzle to deflect the said spray substantially tangent to the peripheral wall of the roll, a manifold adiacent each end of said roll and connected to the opposite ends of the spray pipes respectively, a duct connecting said manifolds, a feed pipe axially aligned with and extending outwardly through one of said trunnions and connected to one of the said manifolds, a discharge pipe axially aligned with and'extending through the other of said trunnions and connected to an exhaust chamber in the second of said manifolds, and an exhaust pipehaving an' intake located adjacent the lowest portion of said roll and connected to the said exhaust chamber.

7. The combination of a hollow chilling roll, trunnions extenctng outwardly from the opposite ends of the roll respectively, means for rotatably supporting the trunnions in a horizontal plane, a series of spray pipes in and extending longitudinally of said roll in circumferentially spaced relation to' each other, a manifold adjacent each end of said roll and connected to the opposite ends of the spray pipes respectively, a duct connecting said manifolds, a feed pipe axially aligned with and extending outwardly through one of said trunnions and connected to one of the said manifolds, a discharge pipe axially aligned with and extending through the other of said trunnions and connected to an exhaust chamber in the second of said manifolds, an exhaust pipe having an intake located adjacent the lowest portion of said roll and connected to the said exhaust chamber, a feed pump connected to the said feed pipe, and an exhaust pump connected to said discharge pipe,

8. The combination of a hollow roll, means within the roll and provided with a plurality of relatively spaced openings for discha ging fluid against an inner surface of the roll, and deflecting means interposed between said openings and said wall in predetermined fixed relation to said opening and to the curvature of said wall for spreading the discharges from said plurality of openings respectively substantially into marginal contact with each other for transforming 'the plurality of independent discharges into substantially a single sheet-like form.

ALPHEUS O. HURXTHAL.

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