US2340180A - Rapping device - Google Patents

Description

Jam. 25, 1944. A. s. GANNONE RAPPING DEVlICE Filed Jan. 4, 1943 3 Sheets-Sheet l I Jan. 25, 1944. A. s. camuuomsv RAPPING DEVICE Filed Jan. 4, 1945 3 Sheets-Sheet 2 Jab. 25, 1944. A. s; GANNCNE RABPING DEVICE Filed Jan. 4, 1945 3 Sheets-Sheet '3 Patented Jan. 25, 1944 RAPPING DEVICE Anthony S. Gannone, Bound Brook, N. .L, assign.-

or to Research Corporation, New York, N. 1., a c rporation. of New rk Application January 4, 1943, Serial No. 471,289

' 7. Claims. (01. 259-1) This'invention' relates general to means for jarring or: vibrating apparatus utilized in remov 'ing suspended particles fromv gases. It relates in bartiquiart ap ratus, for droppin a missile such as a metal ball upon the electrode structures of electrical precipitators, precipitators of the Co'tt'rell' type, 'for instance, to remove deposited materialirom the. electrodes of the precipiators- The invention hasior its principal object the provision of apparatus for raising a striking member to a level above an, anvil associated with an electrode structure andfallowing the striking member to fall freelyunider the influence of ra ty p n t e anvil.

'AIn ore particular object of the invention is tq'prdvide 'a unitary ball handling device arranged-for rotary or oscillating movement about afhorizonta'l axiswhich will repeatedly pick up afjball; carry 'it'to a'"positionapproximately over air anvil associated with'an' electrode structure, en; release it to fall by, gravity upon the tli e "i oll'owing description of the invention it is; tube understoofl thatth e term electrode structure? mayfreferto a single electrode, such as a 'coliecting; electrode of the plate type; or to u port. r s a y one md c trodesfsuch as the busjbars of discharge electrode systems. The invention can be applied, of course, toj the wallsjor other parts of an electrical pi'ecipitator upon which particulate material is electrically or mechanically "deposited and the removal; of them t rial therefrom is necessary if the precipitator 'l' S' to operate continuously, at

'- c emciencyi' ref rrfedemfoodiment of the invention pro a unitarymeansffor rapping with a fractu're'r'esisting metal ball, comprising a horizontal shaft capable of rotary motion, a ball'liftin g member attached to the shaft and having at least 010.612.1171 projecting outwardly from the shaft, and a' hammer 'bal l,f the latterb'eing' retained within the 'liitingfmember in such a' manner that it can-move" therein and can project partially throughthe confining elements of the arm or arms to contact the surfa'ce, of the anvil or anvils itisadapted to strike. "The ball lifting member is furthercharacterized in that it is so shaped and constructed that, upon rotation of the shaft, the arm portion or portions are capable of lifting the ball above an anvil to be struck, provision being made-for retaining the ball in the elevated position until an arm portion moves into a position which provides a path to-the anvil for the ball, whereupon the ball drops down the arm and projects through the confining elements of the arm far enough to strike the anvil. The arm then lifts the ball as before and the, cycle is repeated. The manner in which the objects mentioned above and other objects are realized by the invention will be set forth in the following description, illustrated by the accompanying drawings wherein: V

Fig. 1 illustrates in side elevation apparatus comprising one embodiment of the invention;

Fig. 1a is a fragmentary detail of the apparatus of Fig. 1; Fig. 1b is a fragmentary detail in partial section of a modification of the apparatus of Fig; 1;

Fig. 1c is a fragmentary detail in partial section of another modification of the apparatus of Fig. 1;

Fig. 2 is a bottom view in Fig. 1;

Fig. 3 is a diagrammatic representation of one method of operating the apparatus shown in Figs. 1 and 2;

Fig. 4 is a diagrammatic representation of another method of operating the apparatus shown in Figs. 1 and 2; Fig. 5 is a diagrammatic representation, of a different method of operating apparatus similar to that of Fig. 1; Y

Fig. 6 is a diagrammatic representation of a modified form of the invention Fig. '7 is a side elevation of another modification of the invention;

of the apparatus shown Fig. 8 is a side elevation in partial section of a.

further modification-of the invention, and

Fig. 9 is a perspective view of a stilliurther modification of the invention.

The apparatus illustrated in Figs. land 2 comprises a track or guidestructure including ball lifting arm i l and ball retaining recess t5, a striking ball it within the, track structure, anda rotatable shaft [1 to which the track structure is attached. TWO; members II, which may be iron castings, fastened to ether with, transverse bolts [Zand cap screws I 3, make upthe track structure and each member I l has under its knee a pad l6 containing a semi-circular depression in which shaft I! is retained. A saddle plate 18, with a semi-circular.depressionthat-is complementary to the depressions in members I land has a partially serrated surface, clamps over shaft i? and eng ages toothed key 2}] which isembedded shaft irassh' wn o fully inFig. 1a., "Shaft Ir is mounted in bearings tnot shown) and-thesiiaft to strike anvil 30, has an elongated shape to allow for the out-of-vertical path of the dropping ball and to make it unnecessary to determine" exactly where the ball will strike the anvil. The

anvil 30 is mounted on member -3-l which carries recesses and as guideways for the missile ID as the track structure oscillates between the position shown in solid lines and the position indicated in broken lines at A.

Figs. 7 and 8 show track structures comprising symmetrical paired arms which alternately cause the missile contained therein to strike paired anvil members 30.

In the'apparatus of l 'igijfl'ther'track structure comprises symmetrically *paired'- arms "4| each having a ball retaining recess 42 and mounted for oscillation about shaft I! so that in alternation the ball is guided to fall upon one and the electrode supports 32 from which electrodes 33 are suspended. Member 3| is supported by insulating bushings 34. The lower end of arm l4 in Figs. 1 and 2 is shaped to ride over the anvil 30. In Fig. lo a modified form of the end of arm I4 is shown in which the sides l9 depend below the top surface of an anvil I In the modification shown in Fig. 1?), means is provided for positively ejecting the ball from the recess l5a, comprising a finger 35 angularly fixed to arm 36 carrying weight 31 and pivotally mounted at the end of recess l5a so that when arm 14 is in position to guide the ball tothe upper surface of the anvil, finger 35 swings into position to eject the ball from recess l5a. Lateral shelf members 38 in'r'ecess l5a support the ball in said recess when in the position indicated in dotted lines. a

"Fig. 3 indicates how, upon oscillating shaft I! and raising the endoflifting arm I4, containing the ball, to approximately horizontal position indicated in dotted lines, the ball is made to roll into recess i5 where it remains until the arm returns to a position over the anvil when it rolls out or the recess and fallsto the anvil. The slope of the bottom of recess l5 with relation to the free falling path provided by arm l4 must be such that the ball will roll out of the recess when and only when arm I4 is properly positioned over the anvil or is approaching the proper position, allowance being made for the time necessary for the movement of the ball. These relativepositions can be determined by trial, test apparatus which permits the angle between portion I4 and portion 15 to be altered being used to advantage in determining the desired relationships. When the apparatus is oscillated as shown. in Fig. 3, interior "surface s of arm Hi serves as a runwayfor the return of the ball to recess [5.

Fig. 4 indicates how the apparatus operates when shaft l! is continuously'rotated. "The ball now drops once every revolution of the shaft or after a shaft movement of 360 degrees. With an oscillating shaft, as indicated in Fig. 3, onthe other hand, the ball drops every time the shaft turns, say, 96 degrees, and returns to its original position, or ato'tal of 192 degreesmSurface s'- of arm i4 serves as a runway for the return of the ballto recess #5 when the apparatus is rotated as indicated in Fig. 4. w V, I .In the modificationshown in Fig. 5, the track structure is pivoted about shaft I! at a point'near the anvil. Arm Mo and recess 15b function on oscillation of the trackstructure about the shaft similarly to the correspondingarms and recesses of Figs. 1-4. Z

,'.In the form of the invention shown in Fig. 6, the symmetrical arms 40 function alternately'i'as other of the paired anvils at the end positions of oscillation defined by stops 43. In operation,

-as the track structure oscillates about shaft l1 from the position shown in full lines the ball is carried upward in the end of lower arm 4| until the arms pass just beyond the horizontal position when the ball will run down the arm and drop into the first recess 42. As the track structure continues its oscillation toward the position shown in dotted lines, the'ball remains in the first recess which in the dotted line position becomes the uppermost recess and in this position the ball drops out "of the recess and falls substantially freely onto right-hand anvil 30.

' In the apparatus of Fig; 8 the paired arm members 44 act alternately as ball retaining recess and ball guides to cause the ball to strike the paired anvils in alternation as the track structure oscillates aboutishaft. I 1.

The enclosures illustratedinfFigs. 1 and 2, and 5-8, are shown imperforate except for the slots through which the balls project in striking the anvils, but the walls'ofthe enclosures can be perforate for purposes of reduction in Weight, observation and removalof dust. The apparatus illustrated inFig. 9 realizes these purposes. The track structure "comprises top plate 50, bottom plate 58, and guide members 55, 56 and 57 which are attached to both plates and tie the whole into a unit structure. Plate'50 has an opening 5I, covered with a removable plate 52, through which a ball may beintroduced. Plate. includes lugs 53 bent down "at right angles to the face of the plate to support retaining plates 54 for shaft H; which serves to oscillate or rotate the structure. Retaining bars 51 are bent to provide a recess 6| for retention of the striking ball (not shown) for the purpose described in connection with other forms of the invention. Guide members 55; 56an'd 51 obviously can be abbreviated except, to'the extent they are needed to hold the apparatustogether, to provide a runway for the ball, and to prevent the ball from leaving the runway, say, when bouncing after striking the anvil. A slot 5 9 in'plate 58 permits the-striking ball to project through to an anvil (not shown). Q 1

In applying the invention to electrical precipitators of the Cottrell type, one or a plurality of the striking units described above'can be used to rap or vibrate a single precipitator, depending upon the size of the precipitator and the need for rapping it. The design 'of the precipitator Willdeterminethe' positi'oiifof the anvils and the manner'of their attachment to the electrode structures or other precipitator' elements which are to be rapped or vibrated.

I claim:

1 Apparatus for rapping material-collecting structures, comprising an anvil mounted on the material-collecting structure, a trackway for a s e i f s l fi lilis agui in p rtion and a missile-retaining portion, said trackway being pivotally mounted for movement with respect to the anvil from a position in which a missile will be guided by the guiding portion into the retaining portion to a position in which a missile will be released from the retaining portion and guided by the guiding portion into substantially free impact upon said anvil.

2. Apparatus for rapping material-collecting structures, comprising an anvil mounted on the material-collecting structure, a trackway for a missile comprising a missile-guiding portion and a missile-retaining portion, said trackway being pivotally mounted for movement with respect to the anvil in a vertical plane from a position in which a missile will be guided by the guiding portion into the retaining portion to a position in which a missile will be released from the retaining portion and guided by the guiding portion into substantially free impact upon said anvil.

3. Apparatus for rapping material-collecting structures, comprising an anvil mounted on the material-collecting structure, a pivotally mounted trackway for a missile rotatable with respect to the anvil into position to guide the missile into impact upon said anvil, and means for retaining said missile at a point in said trackway spaced from the anvil when the trackway is in positions other than the position at which the missile will be guided into impact upon the anvil.

4. Apparatus for rapping material-collecting structures, comprising an anvil mounted on the material-collecting structure, a pivotally mounted trackway for a missile rotatable with respect to the anvil into position to guide the missile into impact upon said anvil, and having a recess constructed and arranged to retain said missile at a point in said trackway spaced from the anvil when the trackway is in positions other than the position at which the missile will be guided into impact upon the anvil.

5. Apparatus for rapping material-collecting structures, comprising an anvil mounted on the material-collecting structure, a pivotally mounted trackway for a missile rotatable with respect to the anvil into position to guide the missile into impact upon said anvil and having a recess constructed and arranged to retain said missile at a point in said trackway spaced from the anvil when the trackway is in positions other than the position at which the missile will be guided into impact upon the anvil, and means for ejecting said missile from said recess when the trackway is in the position at which the missile will be guided into impact upon the anvil.

6. Apparatus for rapping material-collecting structures, comprising an anvil mounted on the material-collecting structure, a trackway for a missile pivotally mounted for oscillation with respect to the anvil between terminal positions in which the trackway guides the missile into impact on said anvil, and means for retaining the missile at a point in said trackway spaced from said anvil at positions of said trackway other than said terminal position.

7. Apparatus for rapping material-collecting structures, comprising a pair of spaced anvils mounted on the material-collecting structure, a trackway for a missile pivotally mounted for oscillation with respect to the anvils between terminal positions in which the trackway guides the missile into impact upon said anvils in alternation, and means for retaining the missile at a point in said trackway spaced from at least one of said anvils at positions of said trackway other than said terminal positions.

ANTHONY S. GANNONE.

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