US1743934A - Dust separator - Google Patents

Description

Jan., M49 M939.. R, RUEMELMN L74334 DUSTl SEPARATOR Filed Nov. 26. 1924 2 sheets-sheet 1 Jan. M, 1930. R, RUEMEUN 343,934

DUST SEPARATOR Filed Nov. 2e, 1924 2 sneetshet 2 Fai-n n if Patented Jan; i4, 1930 OFFICE RICHARD RUEMELIN, F ST. PAUL, MINNESOTA.'

DUST SEPARATOR Application led November 26, 1924. Serial No. 752,436.

This invention relates to improvements in dust separators and devices particularly designed for use in separating or removing from a current of air, such materials as floating dust, grit, sand and other heavier-thanair particles, and more particularly is an improvement over the form of dust collector shown in my Patent' 1,601,148, issued Sepe tmber 28, 1926. Y

An object of this invention is to provide a dust collextor having a plurality of dust collecting. bags or bag-like screens arranged therein, and each such bag preferably being Adivided into a plurality of intercommunieating compartments, through which the dust-laden air must pass for nal cleaning and filtering.

A further object of the invention is to provide'a dust collector having a simple and aoin'expensive means for vretaining vthe lower;

ends of the bags in open dust and air-receivingposition, means jalso being provided for demountably securing theopen ends of the bags thereto.

` A further object is to provide such a device having means for simultaneously shaking or agitating'all of'the dust V'collecting bags for the purpose of dislodging and removing therefrom all of the heavier-than-air material which has accumulated therein and causing it to be precipitated into the lower portion of the vstructure, such action taking place only when the flow of airfthrough the device hasv been interrupted. l

Other objects of the invention will appear from thefollowing description and the accompanying vdrawings and will be more par- .ticularl-y pointed out 'in the annexed claims.A

vIn the accompanying drawings there has been disclosed a structure designed to carry out the various objects of the invention, but it is to be understood that jthe invention is not confinedA to the exact features shown, as various changes may be made within the .scope ofthe claims which follow. In thev accompanying drawings forming part of this specification,

Figure l is a view in sectional-elevation taken on the line 1 1 of Figure 2, showing the invention applied to a dust collector;

Figure 2 is a cross sectional view on the line 2-2 of Figure 1, showing the preferred manner of supporting the dust collecting bags in the apparatus;

Figure 3 is a detail plan view of the frame to which the lower open ends of the bags are demountably secured;

Figure 4 is a sectional plan view showing the means provided for shaking the bags;

Figure 5 is an enlarged detail view of the bag supporting means, also the means provided for demountably securing the lower open ends of the bags to the supporting frames;

Figure 6v is a perspective view of one of the bags removed from the apparatus;

` Figure 7. is a det-ail viewl showing a modified construction of the means for securing the lower open-ends offthe bags to the sup-4 porting frame; :and

Figure 8 is a view showing a modified con struction of the bag shaking means.

In the selected embodiment of the invention here shown, there is illustrated a dust collector similar to the one shown in the above mentioned prior pendingapplication, comprising a casing 1l having a hopper 12 provided in the lower portion thereof, as

shown in Figure 1. An intake openingl is provided in the upper portion of the casing'and communicates with an expansion chamber 14 arranged within the casing 11.v A discharge opening 15 is provided 'in the lower portion of the expansion chamber 14 through which the -heavier particles such as sand and grit may be precipitated into the hopper 12 therebeneath. The lighter materials will be carried with the dust-laden air from the chamber 14 through ports 16 provided in the wall 17 ofthe expansion chamber 14. ,o Difusers 18 are preferably provided within the casing 11 adjacent the port-s 16 to diffuse or distribute the air current so as to produce a uniform velocity of the air through the casing and also for the purpose of avoidng'a whirling or short-circuiting action. Y

An important feature of this invention resides in ,the novel construction and ar-vV rangement. ofthe dust-collecting bags or screens 19 which are mounted within a clean air chamber 21, composed on three sides by the walls of the casing 11 and having an inner wall 22 preferably of a fine meshed screen or cloth, through which air may pass from the interior of the casing 11 and into the clean air chamber 21. (See Figure 3.) As shown in Figure 6, the dustecollecting bags resemble in form an open-ended bag having a series of stitchings 23 provided longitudinally thereof in the intermediate portion of the bag. These stitchings unite the opposite sides of the bag, thereby substantially providing a series of inter-communicating compartments within each bag, the upper and lower ends of the compartments being in direct communication with one another as a result of the stitchings 23 extending only partially the length of the bag.v The lower open end 24 of each bag is preferably provided with a beaded edge 25 which is adapted to be seated in an annular groove 26 provided in the upper surface of a frame 27 forming the lower wall of the clean air compartment 21. Suitable cleats or strips 28 are provided for` securing the edge of the bag to the frame 27 as shown in Figure 5. These strips or cleats may be conveniently secured to the frame 27 by such means as screws or nails. A plurality of elongated openings 29 are provided in the frame 27 and these openings are arranged to register with the open end of the sack when it has been secured tothe frame as shown in Figure 5. The upper end of the bag is yieldingly secured to avsupporting bar 31 having its ends suitably secured to the-side walls of the casing 11 as particularly shown in Figure p2. The means provided for thus yieldingly supporting the upper ends of the bags preferably consists in the provision of a bar 32 arranged within the closed end of the bag and having an I-bolt 33 secured thereto which extends through the wall of the bag and has a spring 34 connecting it with the supporting bar 31. Thus it will be seen that the bags lwill be held in an upright taut position. If desired, however, the tension springs 34 may be dispensed with and the I-bolts 33 connected to the supporting bar 31 by means of a piece of wire passed therethrough and around the bar.

In the operation of the device, the dustladen air will circulate through the casing 11, as indicated by the arrows in Figure 1, thence upwardly through the elongated openings 29 in the lower wall 27 of the clean air chamber 21. From these openings, the air will enter the compartments in the bags 'andY will outwardly pass therefrom through the walls of the bag, the dust carried upward-ly into the bags by the air being collected within the compartments tlireof, and only the clean air passing through the walls of the bag into the clean air chamber 21. The bags are preferably constructed of a fine mesh cloth although other materials may be used. From the chamber 21, the clean air will be discharged through the discharge opening 35 into a suitable receiving trunk, not shown.

Means -are also provided for shaking or agitating the bags to dislodge and remove the dust therefrom when a considerable amount of dust has been accumulated therein. The means provided for thus shaking the bags is clearly shown in'Figure 4, and comprises a plurality of U-shaped rods 36 having their ends suitably' secured, by such means as the threaded nuts 37, to a reciprocally mounted shaker bar 38 mounted in bearings 39 provided in the walls of the casing 11. Means are provided for actuating the bars 38, and therefore the U-shaped rods 36, and as here shown comprises an upright oscillating arm 41 pivotally mounted on a bracket 42 secured to the wall of the casing. The arm 41 is oscillated by means of a cam 43 mounted upon a back gear 44 driven by a pinion 45 mounted on the shaft of a motor 46, (see Figures 2 and 4). When the motor 46 is started, a reciprocatory movement will be imparted to the bar 38, thereby causing the parallel side members of the U-shaped rods 36 to alternately engage the sides of the bags thereby imparting a shaking and agitating movement to the bags which will cause the dust accumulated therein to become dislodged and precipitated through the elongated openings 29 in the lower Wall 27 and into the hopper 12 arranged therebeneath. The U-shaped shaker rods 36 are preferably arranged so as to engage the central portions of the bags, which has been found to be more effective in dislodging the dust accumulated therein. A hinged door or gate 47 is preferably provided at the apex or bottom of the hopper 12, and this gate is normally retained in closed position. When, however, sufficient sand and grit has been accumulated in the bottom of the hopper to `cause the weight thereof to a-utomaticallv open the gate 47, the latter will be opened to allow the contents of the hopper to be dischargedi'therefrom into a suitable receiving means, not shown. As soon as the hopper has thus been emptied the gate will automatically close and prevent the/escape of air therethrough until again opened by the weight of material accumulated in the hopper. A manhole 48 is preferably provided in the wall of the casing 11 through which access may be had to the interior thereof.

Th* purpose of forming the bags with a plurality of compartments, as above described, is to prevent the side walls thereof to contact with one another, when inflated, 1n the operation of separating the dust from the air. If the walls of the bags are allowed to contact `with one another during the operation of the apparatus the contacting portions of the bag walls will be rendered inoperative and will thereby reduce the capacity of the apparatus. By the novel' arrangement and construction of the bags here shown, it will be impossible for the walls of adjacent bags to contact with one another during the operation of the -separator which, therefore, will tend to greatly increase the capacity thereof.

In Figure 7, there is shown a modified construction of securing the lower open end of the bag to the lower wall"27 of the clean air chamber 21. In the construction here shown the annular groove 26 has been eliminated from the frame and a grooved cleat 4,9 is provided wherein the bead 26-of the bag will be seated when the cleat 29 is secured tothe frame 27 as shown. y v Figure 8 illustrates a modified construction of the shaker'rods 36. As here shown instead of each bag being encircled by a shaker member or rod as shown in Figure ,4, a plurality of straight rods 51 are interposed between the bags which are so arranged as to engage the side walls of the bags when the shaker barv 38 isreciprocated. When the latter construction is used, it will be necessary, of course, to increase the travel of the shaker bar 38 in order that the rods 51 will be brought into contact with the walls of the bags.

I claim as my invention:

l. A hollow structure as a suction casing divided by a horizontal partition into upper and lower chambers, one a bag chamber, the partition having an opening therein, a bag having an open lower end arranged sealingly around the opening, means yieldingly attaching the upper closed end of the bag to hold it in taut condition, a bar horizon-- tally slidable in the casing walls and traversing the bag chamber and having beater elements mounted thereon, one at each side of the bag, and spaced from its walls, and means for obtaining an oscillation of the bar, vibratory in character, alternately in opposite directions. v

2. Ac hollow structure as a suction casing divided by a horizontal partition into upper and lower chambers, one a bag chamber, the partition having openings therein spaced apart, bags cach having an open lower end arranged sealingly around .one opening, means yieldingly attaching the upper closed end of each bag to hold it in taut condition, a bar horizontally slidablel in the casing walls and traversing the. bag chamber and having beater elements mounted thereon one at each side of each bag and normally spaced from the bag walls, and extending the full length of the gre-test transverse dimension of the bag, and means for obtaining an oscillation of the bar, vibratory in character, alternately in opposite directions.

3. A vhollow structure as a suction casing divided by a horizontal partition into upper and lower chambers, one a bag chamber, the partition having openings therein spaced apart, bags each having an open lower end arranged sealingly around one opening, means yieldingly attaching the upper closed end of each bag centrally of thev bag to hold it in taut condition, a bar horizontally slidable in the casing walls and traversing the bag chamber laterally of the bags, and having mounted thereon beater elements relatively flexible, one at each side of each bag, and spaced from the walls of the bags, substantially at the level of the vertical middle of theV bag, extending the full length of the greatest transverse dimension of the bag, and means for obtaining an oscillation of the bar, vibratory in character, alternately in opposite directions.

In witness whereof, I have hereunto set my hand this 22nd day of November, 1924.

RICHARD RUEMELIN.

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