US2503686A - Aggregate drier - Google Patents

Description

K. A. RAYPHOLTZ April 11, 1950 AGGREGATE DRIER Filed June 5, 1946 m Mm R Patented Apr. 11, 1950 asoass AGGREGATE DRIER.

Kenneth A. Raypholtz, Marion, Ind., assignor to vOvermander.Machine, Ina, Marion, Ind., a corporation Application June 5, 1946, Serial No. 674,423

. '8 Claims. 1 This invention relates to a drier structure for aggregates and the like.

The chief object of .thisinvention is "to-provide a drier of extreme simplicity and one which is capable of disassembly for interior access .for

repair and replacement purposes and one where-' in the aggregate is tumbled .by reason'of rotation of the drier drum and is advanced from the inlet to the discharge end thereof by what might be termed generally ahelical like series of transfer pocketsassociated with diametrically positioned dams.

The chief feature of the invention resides in providing a structure including theaforesaid and associatingthesame'with a flame'unit, the-latter discharging to'a combustion chamber juxtapositioned to the discharge end of the drier, the intake end being suitably muffled, and associating therewithbetween the combustion-chamber and the discharge chamber'an igniter.

One specific feature of the invention resides in the circular offset successive transferpockets upon the drier interior, and associating with-each in diametrically opposed relation an interior dam.

Gther objects and features of the :invention will be set forth more fully hereinafter.

'Thezfull nature of the-.invention-will be understood from the accompanying drawings and the following description and'claims:

Inthe drawings I f Fig. 1 is aside elevation of a drier unit embodying the invention, parts being :broken away toshow the same'and other parts in'section.

Fig. 2 is an end View of the drier.

Fig. 3 is a developed plan view of a portion of :the drum interior showingrthe transfer pockets. 1 H I .Fig. 4 is an end ;elevational view of 'theigniter mechanism and thecombustion chamber together with the associated control "circuit.

In Figs. 1 and 2 of thedrawings, l and H indicate suitable supports in spaced relation thatterminate .in anarcuate cradle 12, and associated therewith is a plurality or rolls. [3 by which the circular rings M are rotatably supported. L

These circular rings are hereinl 'shown as 0i angle'section'see Ma. 'On'eof the rings carries, by means of brackets l 5 a sprocket I 6,andmeshingztherewith is a chain 7 driven 'bya sprocket pinion IBcarried by ashait l9, see Fig. 2, this shaft'heingisuitably driven. j

Herein the drum proper includes three sections, A, 'B, and 0,101 convenience, and the same have an exterior shell portion 20 and an interior shell 2|. ,Therebetween preferably is included insulation 22.

The shells aremaintained in spaced relation by means of annular discs 23 and 24 and the intake end includes the disc 25. The flange structures Ma are carried between discs Hand 25,.as shown.

It will'be'noted that at the intake end, which is the larger end of the drier, the shells 2fl-and 2| have inwardly directed flanges, same being suitably'secured to the disc 25, and tothe same also is secured 'armuiiledstructure 25. The discharge end of the drier is similarly'formed 'by. inwardly directed flanges, as indicated at 128.. If desired, the several sections, A, B and C, may be detachably associated together so that access may'berhad'from either end of eachsection, when disassociated, for removal of damaged parts within the drier and replacement of parts'for renewal purposes;

It is to be understood that the aggregate is supplied at the open mouth 29 of the mufiie structure and'by any suitable means, see dotted lines.

The discharge is efiected-at the opposite end 3U-of the drier, whichis'oi lesser "diameter-than the intake ,endof the'drier, although the muflle intake 29 is of 1185581 diameter.

.Adjacent the ;dischargeendof the drier is any suitable discharge means, or the same may be omitted whenever desired or required. However,

inspaiced relation-to and'coaxial withthe drum,

which although of conical type is mounted for rotation on the horizontal axis, is a refractory ignition tile element 3| suitablywsupported and having an oppositely directed conical interior 32 providing a combustion chamber 33.

vAt the more remote-and smaller end of this combustion chamber there is provided an :oil and gas burner unit having the nozzle 34 into the combustion chamber and preferably axially lined therewith but longitudinally spaced from that chamber to permit air entrance for combustion purposes.

.Interposed between the discharge end of the drier and the discharge end of the combustion chamberand movable intothe gap therebetween is an'igniter structure indicated-generally by the letter D in Fig. 1 and shown more particularly in igf :Herein there .is .pivotally supportedv on support 35 a T-shaped lever having the .arm .3fi,. th.e arm 3'land the arm 38. Thearmtfl .adjustabl supports at. an igniterstructiu'e 40 having .the:

spaced and insulated electrodes 4| and 42 projecting therefrom.

The arm 36 includes a threaded extension 43 upon which is adjustably mounted a counterbalancing weight structure 44 locked in the adjusted position as at 45. The arm 31 is connected as at 46 to a link 41 pivotally connected at 48 to the core 49 of a stationary solenoid 50.

L and L indicate respectively the supply lines from a supply circuit not shown. It is to be understood that the support 35 is suitably supported and that the solenoid 50 is stationarily supported by suitable means, not shown.

The solenoid 59 is connected by line I to line L and it is also connected by line 52 to one terminal 53 of a push button switch having the actuating portion 54. The other contact of this switch is connected by line 55 to line L Therefore, whenever the push button switch is closed the solenoid 50 will be energized and the arm 31 will be rotated clockwise upon the support 35, thereby rotating clockwise the igniter 40.

Such rotation positions the igniter 40 in the gap and in partial registration with the discharge end of the drier and the discharge end of the combustion chamber so that the combustible mixture then in the chamber will be ignited, and thereafter the flame will be directed inwardly and axially of the drier structure.

In Fig. 4, primary of a transformer T is indicated by the numeral 56 and same is connected by line 51 to line L The other terminal of the transformer primary is connected by line 58 to line L In other words, the primary is always across the line in the present illustrated circuit.

Associated with this primary is a secondary 59, and it has one terminal connected by line 69 to a terminal 6|. The other terminal 52 is connected by line 63 to one electrode, to-wit, electrode 42. The other terminal of secondary 59 is connected by line 64 to the other electrode 4 I A line 65, connected to line L in turn is connected to a relay 66, the other terminal of which is connected by line 51 to the line 52 or contact 53.

This relay controls a bridging contact 68 so that when the push button 54 is closed the relay will be energized, the bridging contact 68 will be elevated and close the circuit across the contacts BI and 62, thereby closing the circuit through the secondary and. to the electrodes 4I-42.

At such time the spark passes between electrodes ll and 42. In other words, solenoid 50, relay 56 and primary 66 are all standard or low voltage units while the secondary 59 and igniter 40 are hi h voltage units, and the igniter is only energized for ignition purposes when the push button 54 is closed, which means the igniter is only energized for ignition purposes when the igniter is interposed between the combustion chamber and the discharge end of the drier.

Reference will now be had to certain of the cutaway portions of Fig. 1 and Fig. 3. Therein it will be noted that the interior 2I of conical drier shell or drum is provided with inwardly directed annular vanes or partitions designated by the numeral Ill. These may be of any radial width and may be spaced apart longitudinally as desired or required.

Between each adjacent pair of circular vanes III is a longitudinally directed dam II. Diametrically opposite the dam II which is radiall positioned, there is provided an inclined dam I2, and the same is inclined, as shown in Fig. 3, relative to the direction of rotation of the drier.

Adjacent the junction of the inclined dam I2 and the adjacent circular vanes I0 there is a gap I3 so that as a result of the direction of rotation the aggregate engaging the dam I2 slides from one annular portion of the drier into the next succeeding portion of the drier defined by the next adjacent pair of substantially circular vanes III. The gap and inclined dam may be termed a transfer pocket arrangement.

It is to be understood, as stated initially herein, that diametrically opposite each inclined vane I2 with the adjacent throat 13 there is provided a radial vane H.

As the drier rotates the aggregate picked up by the vane II is carried upwardly until it drops downwardly from the inside shell 2|. As it drops downwardly it drops into substantially the same annular portion of the drier but by reason of the inclined vane '12 is caused, in drier rotation, to advance from the intake end to the discharge end. It is to be understood that each successive circular portion of the drier is provided with at least one radial vane and a diametrically opposite transfer pocket. Preferably, however, a plurality of the aforesaid are provided as shown in Fig. 3.

It is furthermore to be understood that the radial vanes by reason of the diametrical positioning and the transfer pockets are helically offset,

as it were, with respect to successive circular portions of the drier interior.

In other words, it might be said that there is a helical like series of transfer pockets and a helical like series of radially directed vanes or dams associated with circular channels, the adjacent channels successively communicating with adjacent the pockets for aggregate transfer purposes.

The foregoing description applies to one series of pockets from end to end and one series of radial dams positioned from end to end of the drier. Obviously for efiicient operation there are a plurality of such series and, as shown in Fig. 3, by way of example only.

It also is to be understood that the number of such pockets and diametrically positioned radial vanes or dams need not be the same in number throughout the drier. In other words, it may, if desired, include, for example, twice as many cooperating pairs of dams and pockets at the larger intake end as may be found or utilized at the discharge end so that the term helical like series does not by implication require that there be the same number in each longitudinal section of the drier, considered from end to end.

While the invention has been illustrated and described in great detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character.

The several modifications described herein as well as others which will readily suggest them her, and a conical drier drum, all in longitudinal alignment and spaced one from the other and substantially horizontally disposed, the chamber and. drum being similarly directed with flame and aggregate flow therethrough, respectively, in opposite directions and aggregate and flame flow in the drum of counter-flow type, the larger end of the chamber and. the small end of the drum comprising the respective discharge ends, the drum discharge end exceeding in area that of the chamber discharge end and the inclination of the chamber exceeding that of the drum.

2. A drier structure as defined by claim 1 wherein muflle means of peripheral and bell-like character is provided at the large end of the drum and is centrally apertured for a combination aggregate intake and gas outlet opening of an area less than that of the drum discharge area for combustion products flow retardation towards dis charge.

3. A drier structure including a multi-section conical drum comprised of successive conical sections detachably secured together, the drum being disposed for rotation upon its longitudinal axis, the smaller end comprising the discharge, bellmouth shaped mufile means at the larger end and having a single coaxial intake opening of an area less than that of the discharge, and means only upon the interior of each section of said drum for content peripheral advancement there-v through incident to drum rotation, and readily accessible from either end of the means supporting section for replacement and repair purposes.

4. A drier structure including an elongated conical drum disposed for rotation upon a horizontal axis, the smaller end comprising the discharge, longitudinally spaced circular-like vanes in spaced relation upon the drum interior, radial like dam members between adjacent circularlike vanes, and transfer pocket means between adj acent circular-like vanes positioned substantially diametrically opposite the radial vanes for content advancement longitudinally of the drum and upwardly to the discharge end incident to drum rotation.

5. A drier structure as defined by claim 4 wherein longitudinally successive pocket means and 6 opposed radial vanes are each progressively 011- set circumferentially in successive circular channels.

6. A drier structure as defined by claim 4 wherein each circular channel includes a plurality of radial dams and opposed transfer pocket means, same being alternated.

7. A drier structure as defined by claim 4 Wherein longitudinally successive pocket means and opposed radial vanes are each progressively offset circumferentially in successive circular channels and each circular channel includes a plurality of radial dams and opposed transfer pocket means.

8. A drier as defined by claim 4 wherein the pocket transfer means and radial vanes from end to end of the drum, each are substantially helically disposed upon the drum interior.

KENNETH A. RAYPHOLTZ.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 685,243 Atwood Oct. 29, 1901 743,538 Michaelis, Jr Nov. 10, 1903 1,142,841 Raleigh June 15, 1915 1,317,686 Chappell Oct. 7, 1919 1,435,930 Laury NoV. 21, 1922 1,703,635 Ranson Feb. 26, 1929 1,758,778 Bauchere et a1 May 13, 1930 1,797,831 Luther Mar. 24, 1931 1,818,616 Good 1 Aug. 11, 1931 1,830,474 Macrae et a1. Nov. 3, 1931 1,882,421 Hedrick Oct. 11, 1932 1,898,776 Horn et al Feb. 21, 1933 1,937,094 Palmer Nov. 28, 1933 1,973,002 Kroepfle Sept. 11, 1934 2,049,734 Fasting Aug. 4, 1936

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