US1539401A - Pulverizing machine - Google Patents

Description

May 26, 1925. 1,539,401

J. NEUBURGER PULVERIZING MACHINE Filed Feb. 2l, 1925 '4 ha g N i *il Patented May-f2.6, A1925.

UNITED STATES JACOB NEUBURGER, 0F CHICAGO,.ILLINIS.

PULVERIZING MACHINE.

Application led February 21, 1925. Serial No. 10,744.

To all whom t lmay concern.'

Be it known that I, JACOB NEUBRGER, a citizen of the United States, residing 4at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Pulverizing Machines, of which the following is a'speciication.

The invention relates broadly to pneumaticy pulverizing devices and'provides a device for pulverizing a wide variety of materials, such as lime stone, coffee, and' any other material that can be broken up by impact and friction.

While I have referred to the present machine as a pulverizing'device.I attach no limitation to the term, asthe principles of the invention can be embodied in a machine for breaking up particles of matter to different degrees of iineness of larger or smaller size than what might be considered a pulverulent state. One of the objects of the invention is to provide a device which will be immune to stoppage or irregular ac'- 'tion from clogging.

Another object is to provide a device that will be simple of construction, inexpensive to manufacture and easily operated at a small cost so as to be highly efficient. l A preferred embodiment of the, invention is illustrated in the accompanying draw# ing in which: l

Fig. 1 is aside elevation partly broken away to show a portion in section.

v Fig. 2 is a transverse sectlon taken on f line 2 2 of Fig. 1, and

Fig. 3 is a fragmental lsection through the lower part of the device shown on an enlarged scale.

` The operation of pulverizing the-material and of separating the pulverized particles from the unpulverized particles are both performed inV a receiving tankl comprising a cylindrical shell 6 and upper and lower frustro conical shells 7 and 8 respectfully. The large circular ends of both of the conical shellsl are formed with vertically extending lafnges 9 and 10. These form cylindrical surfaces to which are secured annular attaching rings 11 and 12 of angle section, which in turn are riveted to companion attaching rings 13 and 14 at the top and bottom edges of the cylindrical shell 6.

The small circular e'nds vof the conical shells 7 and 8 are also formed with verti,

connect with a hanged hopper 29 into which Y 'Io the top iange 17 of the conical shell 7 a flanged elbow 24 having a boss 24 integral therewith is secured. 'Io the other Harige of the elbow a discharge pipe line 25 connects. A chute 26 is connected to an inlet 27 entering the lower conical shell 8 and has its upper end ianged as at 28 to the previously ground or broken up material is placed.

On opposite sides of the center line of the cylindrical shell 6 disposed and in the same horizontal plane, are suspension rods 30 extending therethrough and held firmly in place by means of nuts on the ends of said rods drawn tightly against bosses fplred integral with the side walls of the s e l A bafie plate 31 of a diameterless than the diameter of the shell 6 is hung from the rods 30 by U-bolts 32,` the baile plate being disposed Concentrically of said shell to leave an annular opening4 for the passage of a stream of air for carrying away the pulverized material.

A pneumatic discharge'nozzle '33 is supported in the lower part'of the device in position to` discharge against the bottom of said baffle plate at its center. This nozzle comprises a drum 34 having large openings 34 adjacent its lower end preferably in the same horizontal plane. Within said drum and above said openings is positioned a con- 100l ical wall or partition 35 which is preferably integral with the drum. This conical wall or partition has a threaded boss at itsl apex into whichscrews a nipple 36. A closure cap 37 has threaded engagement with said 105 drum and nipple. A blast discharge pipe 33 having its discharge end reduced in size is coupled to the end of the nipple 36. The bottom end of the drum 34 has threaded engagement with the central threaded open- 110 ing 22 in the bottom 'plate 22, and a plug a reduction in the rate of How of air there- 40 having a central which an air supply pipe 41 is secured,

` closes the bottom of the drum through its threaded engagement in the opening 22 in the bottom plate 22.

Material that'has previously been ground or broken up in small particles is put into the hopper from which a continuous discharge will occur over and around the drum 34 of the nozzle. The air blast coming in through the air jet 41 at the upper e-nd of the air supply pipe 41 will cause the particles of material to be drawn through the apertures 34 at each side and into the air stream, similar to an injector action, forced upwardly through the blast nozzle to fo-r cibly strike against the kbaffle plate 31. The force of the impact of these particles under the velocity of-this high velocity air blast will quickly pulverize them. After striking the bailie plate or impact surface 31 lthe particles of material that have not been pulverized will again drop into the'extension pipe or pocket 19 whereby they will be in a position to again pass into the apertures 34 of the drum and up through the air blast nozzle again.. The friction of their passage through the blast nozzle and their friction against each other will aid in the pulverizing action. An auxiliaryl air line 43 entering the elbow 24'discharges air in the direction of the outlet 25, thus tending to aid the propulsion of the discharging dust or pulverized material,`

It will be observed that from the point where the particles are first introduced into the air stream around the tip of the air jet 4l to the point where they strike the impact plate 31 they travel in a substantially straight path. 'Ihe absence of bends or threaded opening in' sharp angle deliections in the path of then particles while they are underthe impelling influence of the air stream allows the particles to retain the velocit of the air stream from-start to finish of thelr impelled motion and thus avoids all tendency of the device to clog. The', lateral introduction of the particles through the relatively large openings 41 to the sides of the upwardly. directed air jet automatically proportions the rate at which the particles enter the air stream,

v and this'al'so avoids tendency to clog. f

The air stream on striking the impact surface 31 is deflected outwardly across the bottom of this surface to the annular opening 44 between the impact surface and the. side walls of the shell 6. Because of therelatively large area of this annular passa ewa U nozzle 33 couple wit 1n1tial retardation of the air stream by contact with the baiiie plate 31, the flow of air passing up through this passageway drops in velocity. The area of the passageway 41 .is not, however, so large as to produce 'such 44 so that it will be of sulicient velocity tov sustain the pulverized particles against the force of gravity but will be of insufiicient velocity to carry the unpulverized particles upwardly through this opening, whereupon these unpulverized particles will 'drop back into the pocket 19. The horizontal lateral deflection of the air stream forms a curtain of air which is Very efficacious for picking up and carrying away the pulverized particles. rObviously, any other gas than air may be employed if any particular action, chemical or otherwise, is desired, and lthis gas or air may be heated or chilled if desired.

While the preferred form of the invention has been illustrated it is not intended that the same be liniited to the exact details and structure shown but as the invention is capable of numerous modifications and changes.

I claim:

1. The method of pulverizing and conveying materials which includes entraining and projecting particles of such materials by a high velocity non-tortuous stream of fluid against the center of a surface substantially transverse to the direction of flow to break up the particles by impact upon said surface, producing a movlng curtain of air at 2. In a device of the character described,

in combination, a chamber for the reception of bulk materials, a perforate drum disposed vertically in said chamber and having an axial outlet, a receiving and separating chamber above said drum, a balile plate disposed in said .receiving chamber transversely to the axial outlet of said drum and peripherally spacedy from the walls of said receiving chamber to afford a continuous passageway of constricted area, and a nozzle axially disposed in said drum for delivering a stream of fluid under high velocity through said drum to entrain materials' deposited therein and deliver them with impact against said baflie plate.

3. In a device of the character described, in combination, a chamber for the reception of bulk materials, a perforated drum disposed vertically in said chamber and having an axial outlet, a receiving and separating chamber above said drum, a baille plate disposed in said receiving chamber transversely to the axial outlet of said drum and receiving chamber to afford a continuous passageway of constricted area, and a nozzle axially disposed in said drum for delivering a stream "of iuid under high velocity through said drum to entrain materials deposited therein and deliver them with impact against said baille plate, and means for introducing materials directly into said first mentioned chamber remote from said baffle plate. Y

4. In a device of the character described, in combination, a chamber for the reception of bulk materials, a perforated drum disposed vertically in said chamber and having an axial outlet, a receiving and separating chamber above said drum, said receiving chamber having an outlet, a baiiieplatedisposed in said receiving chamber transversely to the axial outlet of said drum and peripherally spaced from the Walls of said receiving chamber to afford a continuous passageway of constricted area, a nozzle axially disposed in said drum for delivering a stream of fluid under high velocity through said drum to entrain materials deposited therein and deliver them with impact against said balile plate, and means for creating an auxiliary 'stream of iuid in the outlet .of said receiving chamber.

5. In a device of the character described, in combination, a chamber for the reception of material to be pulver-ized, a drum vertically disposed in said chamber and having transverse inlets placing said drum in direct lateral communication with said chamber, an axial outlet for said drum, a nozzle in said drum concentric With said outlet, a receiving chamber above said first mentioned chamber, a baile plate disposed in said receiving chamber transversely to the vertical axis of said drum, and said nozzle discharging a stream of `fluid through said drum which entrains such materials and impinges them against said baille plate, the material passing through a substantially rectilinear path from its induction into said stream to its point of impact upon said baflie plate.

6. In a device of the character described,

in combination, a chamber for reception of material in bulk, a drum disposed Within said chamber and -provided with transverse inlets in direct llateral communication with said chamber, a constricted outlet for said drum provided with a tapering entrance, and an induction nozzle projecting into said drum substantially axially of said constrictved outlet and spaced from but adjacent to the tapering entrance thereof.

In testimonly whereof, I affix my signature at 10 South a Salle Street, Chicago, Illi nois. i

JACOBy NEUBURGER.

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