CA2150221C - Feed conveying apparatus - Google Patents
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- CA2150221C CA2150221C CA002150221A CA2150221A CA2150221C CA 2150221 C CA2150221 C CA 2150221C CA 002150221 A CA002150221 A CA 002150221A CA 2150221 A CA2150221 A CA 2150221A CA 2150221 C CA2150221 C CA 2150221C
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Abstract
A feed conveying apparatus is disclosed for use in a poultry or livestock feeding system (10). The feed conveying apparatus has a housing (14, 203) having a feed inlet (I) which receives feed from a feed supply (12, BFT) and a feed outlet (O). The housing has a body (24) which generally converges downwardly and inwardly from the feed inlet toward the feed outlet. A feed conveyor (16, 207) extends through the housing. The conveyor has a conveyor tube (17, 209) with a feed auger (18, 211) therein. The feed auger has a multiplicity of substantially equally spaced flights (62) and is driven within the conveyor tube for picking up feed from the housing and for conveying it through the conveyor tube. A regulator (58, 300) is provided for regulating the amount of feed within the conveyor tube downstream from the housing to an amount less than will totally fill the conveyor tube so as to form a partial void (V) within the conveyor tube and to prevent overcompaction of the feed within the conveyor tube. An agitator weight (144a, 219) is positioned within the housing which is movable by the auger as the latter moves within the housing. The agitator weight has a rod (164, 221) attached thereto for breaking up bridging feed within the housing above the level of the agitator weight.
Description
WO 94/15453 , o ~ ~ ~ PCT/US93/12226 FEED CONVEYING APPARATUS
Background of the Invention This invention relates to animal or poultry feeding systems in which a . 5 pulverant, fluent feed is conveyed to a series of feeding stations where it is dispensed for chickens (or other animals or birds) to eat, and, more particularly, to a feed intake unit to which the feedstock is delivered and from which it is conveyed.
Poultry feeding systems are well-known in the art. See, for example, U.S.
Patent Nos. 4,850,307; 4,460,230; 4,003,339; 3,971,340; 3,598,087; 3,415,228;
and 3,230,933. As shown in these representative patents, feedstock from a bulk feed tank or the like is delivered to an intake cup or hopper. From the hopper, the feed is delivered to a conveyor which services a number of feeding stations. In large poultry houses, one of these conveyors may have a length of up to 400 feet and there may be 200-300 or so of the feeding stations. The feed is conveyed, usually by means of an auger received in a feed conveyor tube extending through each of the feed stations. The auger may either be rotary driven or axially propelled within the tube to convey the feed from the intake cup and from feeder to feeder. Feed is deposited from the conveyor into feed pans of the feeders located at each station for subsequent consumption by the birds.
It is a problem with present feeding systems that they can become overloaded and jammed up with feed. This situation is likely to occur, for example, when the feeders are full. Then a substantial amount of feed is retained in the conveyor loop. At the same time, additional feed is being dispensed from the hopper into the conveyor. When that happens, the pressures created compact the feed in the conveyor loop until all void spaces are filled or packed. The resultant pressures eventually cause the auger to jam and stop moving. For example, in certain of the prior art feeding systems (such as shown in U.S. Patent 4,850,307), it is a feature of these systems that voids are intentionally formed between the flights of the auger within the conveyor tube through the use of bailles within the intake cup so as to restrict the flow of feed to the auger. However, it has been found that if no feed is being dispensed to the feed stations and as the conveyor is run continuously, these voids tend to become overfilled as more feed is delivered to the auger. The feed at the inlet to the conveyor is also compacted, as is the feed above it. In this latter regard, even if the feed at the inlet to the conveyor is broken up, the compacted feed above it may create a solid bridge preventing any feed from reaching the conveyor from the hopper.
If the further delivery of feed to the conveyor system ultimately jams the auger, the conveyor feed tube must be disassembled, the compacted feed cleaned out, and everything then reassembled. The feed intake to the conveyor must also be cleaned out to break up deposits of compacted feed. This is not only a time consuming and expensive process, but it means the poultry is either not fed, or must be fed by hand or in some other manner during the down time.
Summary of the Invention In one aspect, the invention provides a feed intake apparatus for a poultry or livestock feeding system, the apparatus comprising at least one housing having a feed inlet which receives feed from a feed supply and a feed outlet, a feed conveyor extending from the housing in an endless loop and returning to the housing, a plurality of feeders spaced along the endless loop, the feed conveyor comprising a conveyor tube and a conveyor element disposed within the tube, the conveyor element having a multiplicity of conveying elements spaced therealong, the conveyor element being axially driven within the conveyor tube around the endless loop for picking up feed from the housing and for conveying it through the conveyor tube to each of the feeders along the conveyor path and for returning any excess feed to the housing, and a regulating tube within the feed outlet receiving an auger, the regulating tube including a regulating section having a diameter only somewhat greater than the diameter of the auger thereby to regulate the amount of feed carned by the auger and to insure that a partial void is provided in the conveyor tube downstream from the feed intake apparatus thereby positively preventing over compaction of feed in the conveyor tube. The regulating tube may further comprise a striping section upstream from the regulating section having a diameter only somewhat larger than the diameter of the auger for stripping excess feed carned by the auger. The regulating tube may have a discharge outlet upstream from the feed striping section for the discharge of the excess feed striped from the auger by the striping section. Suitably, the tube has a feed inlet opening intermediate the striping section and the regulating section for directing feed into the auger upstream of the regulating section thereby to insure the supply of fresh feed to the conveyor. Preferably, the conveyor element is an auger housed within the conveyor tube, the feed auger having a multiplicity of substantially equally spaced flights with at least some of the auger flights within the feed intake apparatus being open from above, the apparatus further comprising an agitator member engageable with the auger flights as the latter move through the housing so as to effect intermittent movement of the agitator member relative to the auger. Preferably, the agitator member has an elongate member extending therefrom into the housing for agitating feed within the housing so as to insure that the feed flows to the regulating tube for being picked up by the auger and conveyed by the feed conveyor.
In a further aspect, the invention provides a method of conveying feed from a bulk supply of the feed to a plurality of feeders by means of a feed conveying system, the feed conveying system comprising a housing for receiving a supply of feed, a conveyor tube extending along a feed conveyor path from the housing to a multiplicity of feeders spaced along the conveyor tube with each of the feeders receiving feed from the feed conveying system, the feed conveyor path extending in an endless loop and returning to the housing, a feed conveying element disposed within the feed conveyor tube and being axially propelled therewithin around the endless loop, wherein the method comprises the steps of:
(a) axially propelling the feed conveying element through the feed conveying tube and around the endless loop to pick up feed from the housing and for delivering feed to each of the feeders around the endless loop and thence returning any excess feed to the housing;
(b) regulating the amount of :feed carried by the feed conveying element downstream from the housing to an amount less than will fill the feed conveyor tube so as to form a partial void within the feed conveyor tube; and (c) continuously driving the feed conveying element through the feed conveyor tube after all of the feeders have been filled with feed so as to replenish feed within the feeders as such feed is consumed without jamming the feed conveying element within the feed conveyor tube.
Brief Description of the Drawings Fig. 1 is a representation of a portion of a poultry feed delivery system with which the intake cup of the present invention is used;
Fig. 2 is a top plan view of the cup with a paddle or stirring assembly used in the first embodiment of the invention;
Fig. 3A is a sectional view of the cup taken along line 3-3 in Fig. 2;
Fig. 3B is a sectional view of another embodiment of the cup of Fig. 3;
Fig. 3C is a view (see sheet 7) on, an enlarged scale taken along line 3C - -3C of Fig. 3B
illustrating a gear having teeth bent out of the plane of the gear with the gear driven by the 3a conveyor auger;
Fig. 3D is a view similar to Fig. 3C wherein the gear teeth have enlarged end portions interengageable with the flights of the anger so as to aid in the breaking up of compacted feed between the flights;
Fig. 3E is a view taken along line 3E - - 3E of Fig. 3C illustrating in plan manner in which the bent gear teeth mesh with the auger to dislodge compacted feed and to regulate the amount of feed;
WO 94/15453 { ~ , _ ~ PCTIUS93112226 Fig. 4 is a top plan view of the cup with a ball installed in the cup and used in a second embodiment of the invention;
Fig. SA is a sectional view of the cup taken along line S-5 in Fig. 4;
Figs. SB and SC illustrate additional ball configurations for the second embodiment;
Figs. 6A and 6B are, respectively, a perspective view of the ball (Fig. 6A) and a combined ball and agitator rod (Fig. 6B);
Fig. 7 is a plan view of the cup of Fig. 4 with portions of the ball broken away a frame installed in the housing of the cup for holding the ball agitator in a desired position with respect to the auger;
Fig. 8 is a side elevational view of one side member of the frame;
Fig. 9 is a plan view of the cup housing with a multiple diameter regulator tube of the invention installed;
Fig. 10 is a side view of the tube;
Fig. 11 is a top view of the tube; and Fig. 12 is a side view of a second embodiment of the tube;
Fig. 13 is a side elevational view of the lower portion of an intake feed cup of the present invention incorporating the regulator tube of Figs. 9-12 illustrating the conveyor tube having a flared bell end adapted to be received on an inlet tube and on an outlet tube of the intake housing;
Fig. 13A-13F illustrate the various diameters of the agitator tube and their relation to the diameter of the conveyor tube and the auger so as to loosen compacted feed, to supply fresh feed, and to form a void (regulate) in the conveyor tube to prevent over filling;
Fig. 14 is a semi-diagrammatic view of a feed delivery and feeder system using multiple conveyor drives and multiple feed intake cups of the present invention;
Fig. 15 is a view of a bulk feed tank which supplies feed to the intake feed cup of Fig. 1 with the bulk feed tank having an outlet boot at the bottom thereof with a rotary driven auger within the boot and with an agitator in the boot similar to the agitator disclosed above in regard to Figs.
4-8; and Fig 16 is an enlarged view taken on line 16--16 of Fig. 15 illustrating a ball agitator/rod for breaking up compacted feed within the outlet or boot portions of the bulk feed tank.
Corresponding reference characters indicate corresponding parts throughout the drawings.
~WO 94/15453 ~ ~ PCTIUS93/12226 Description of Preferred Embodiments Referring to the drawings, a poultry feeding system is indicated generally in Figs. 1 and 14. System 10 includes a hopper 12 into which feed is received from a bulk feed tank BFT or the like (see Fig. 15). From hopper 12, the feed gravitates (falls) 5 into an intake or hopper unloader cup 14 which comprises the present invention and which is described in detail hereinafter. From cup 14, the feed enters a conveyor 16.
The latter includes a conveyor tube 17 in which an auger 18 is located.
Preferably, auger 18 is a centerless auger having the appearance of a stretched out coil spring.
Auger 18 driven by a drive mechanism 20 to cause the feed to be transferred by 10 conveyor 16 to one or more feed stations 22. Auger 18 may be rotatably or linearly driven by the drive mechanism. Auger 18 may be linearly propelled through tube 17 by means of a drive gear having gear teeth in mesh with the flight of the auger.
Such a drive is described in U.S. Patent 4,460,230.
Alternatively, the auger maybe rotary driven within the conveyor tube such that the auger acts like a screw to convey the feed through the conveyor tube.
Still other well-known feed conveyors (e.g., a chain conveyor) may be used. As shown in Fig. 14, when auger 19 is linearly propelled, conveyor 16 may be an endless closed track system in which the conveyor 16 is arranged in a closed loop configuration around the poultry house. As shown in Fig. 14, additional drive mechanisms 20 and additional intake feed cups 14 may be located along the loop to facilitate movement of feed to the various feeders 22.
In delivering feed to feeders 22, one problem which is encountered is feed compaction. Compaction is usually caused by an over abundance of feed being conveyed through the system. If, for example, feed currently in the conveyor is not deposited at a station because the feed already there has not been consumed, excess feed in the conveyor will be circulated back to cup 14. At the same time, additional feed flows from hopper 12 into cup 14 for entry into the conveyor. Since the flow of feed through the cup is by gravity, the feed will exert a substantial amount of "hydrostatic"
pressure on the feed so as to pack even more feed into the feed conveyor. And, since the excess feed in the conveyor is being constantly recirculated throughout the feed loop, rather than deposited at the stations, it often becomes more and more compacted until jamming occurs. If the conveying system gets jammed, it must be disassembled by removing the auger from the conveyor tube, the compacted feed cleaned out, and the system then reassembled. This creates a time consuming and expensive delay especially considering the number of birds fed by the system, and the amount of wasted feed which WO 94/15453 . PCTJUS93/12226 ' -is created by the jam. Intake cup 14 of the present invention alleviates feed compaction, and thus eliminates the attendant time delay and cost.
In Figs. 2 and 3A, a first embodiment of the intake cup is shown to include a housing 24. The housing has a generally rectangular upper end 26 the side walls 28 of which define a feed inlet I. Respective flanges 30 are formed at the upper end of each side wall for attachment of the intake to the bottom or outlet end of hopper 12. It will be appreciated that feed may be supplied to cup 14 by means other than hopper 14. For example, feed may be supplied by means of a suitable drop tube (not shown).
Side walls 28 of housing 24 also have a lower tapered section 32 for the lower end of the housing to define an outlet O into which feed flows from the intake cup 14 into conveyor 16.
Feed conveyor 16 is connected to housing outlet O for the feed flowing through the housing to flow into the conveyor. The conveyor includes conveyor tube 17 having an inlet end at the outlet of the housing and a series of spaced outlets 36, one at each feed station 22. The lower end of section 32 of housing 24 has a rounded semi-cylindrical base portion, as indicated at 38 in Fig. 3A. In addition to helping to define outlet O of the intake cup, base portion 38 also provides a housing for auger 18.
The auger moves rotatably in or linearly through housing section 38 for conveying feed falling from the hopper to be delivered to the conveyor and to be distributed to the outlets 36. Alternately, and as described hereinafter, a multiple diameter tube 40, see Figs. 9-11, may be installed through openings 42 in the lower sidewall of the housing, and auger 18 is movable axially through this tube. The multiple diameter tube 40 serves to permit more feed from within housing 24 to enter the conveyor and also serves to prevent over filling and/or over compaction of the feed in a manner as will appear.
Referring to Fig. 3A, an optional baffle 44 within housing 24 has one end attached to a side wall 28 of the housing at the upper end of the housing.
Baffle 44 angles downwardly into the housing to form a chute for the feed F delivered to cup 14 from the hopper. In addition to baffle 44, a support plate 46 is also attached to a side wall 28 of the cup housing. The upper end of plate 46 is, as shown in Fig. 3A, attached to the same side wall 28 as is the upper end of baffle 44, so the baffle and plate depend - 30 from the same side of the housing. Baffle 44 overhangs plate 46 minimize the effect of "hydrostatic" pressure of the feed in the intake cup and hopper 12 from over compacting the feed. Or, as shown in Fig. 2, baffle 44 does not have to be used.
An agitator 48 is positioned in the tapered lower end of housing 24 so as to agitate the feed falling into the outlet of the intake cup. By churning or stirring the feed within housing 24, it will not be easily compacted and therefore will not bridge within the housing and will thus flow continuously down toward the conveyor.
Agitator WO 94115453 ~ PCTIUS93/12226 :a ..,, :f. , .. .
48 first includes a pair of rotatable blades 50 and 52, respectively, commonly mounted for rotation on a shaft 54. The stirring blades are mounted on the shaft so they are at a 90_ angle to each other as shown in Fig. 2. Shaft 54 extends through support plate 46 and is rotatably supported on the plate 46 and on housing 24 by bearings 56. A
gear 58 is fixedly mounted on shaft 54. The gear is located such that its teeth 60 extend into the outlet portion 38 of the housing. The teeth mesh with flights 62 of auger 18 (see Fig.
3C). Consequently, movement (either axially or rotary) of the auger turns the gear, and rotation of the gear causes rotation of the agitator blades 50, 52. This produces the stirring action discussed above. In operation, upper blade 50 of the blade assembly promotes flowability of feed from the hopper, and the lower blade 52 provides agitation of the feed to keep it flowing into the outlet. As gear teeth 60 move in and out of mesh with the flights 62 of auger 18, the gear teeth move in toward the center of the auger and thus physically break up compacted feed carried by the auger. Thus, the gear teeth tend to prevent over compaction, over filling, and jamming of the conveyor.
Further, as ~ excess, compacted feed is dislodged from the auger by the gear teeth, fresh feed is re-mixed therewith such that fresh, loose feed is conveyed from the feed cup to feeders 22.
It will be appreciated that teeth 60 of gear 58 may be enlarged and may be of a bulbous shape so as to fit more closely between the flights 62 of auger 18 thereby to aid in breaking out compacted feed within the auger and to insure proper conveyor filling and to reduce or nunimize the possibility of jamming the conveyor.
Figs. 3B and 3C illustrate an alternate embodiment of agitator means 48 from that shown in Fig. 3A. In Fig. 3B, a gear 58" (a third rotatable stirring blade) mounted on shaft 54. The teeth 66 of gear 58" are angled or bent with respect to the body of the gear for contact with flights 62 of auger 18. Now, as the auger is moved, the bent gear teeth 66 are engaged by the moving auger 18 thus causing gear 58" to be rotated in the appropriate direction producing, in turn, rotation of blades 50 and 52.
Blades 50 and 52 function as previously described. Bent gear 58" provides the additional feature of regulating feed level. This is important when, for example, the auger is completely filled with feed. Through use of bent gear 58", as the bent gear teeth 66 move down into, across, and up out of the space between the flights 62 of conveyor 18, so as to dig out compacted feed thus resulting in a positive displacement of excess feed. In Fig. 3C, the bent gear 58" is shown in side elevation and it can be seen that bent gear teeth 66 move down and into the auger below the centerline thereof.
Simultaneously, as shown in Fig. 3F, the teeth sweep horizontally across the auger. In this manner, compacted feed within the auger is positively broken up, dislodged and is WO 94/15453 ' y : . : PCTIUS93112226 physically discharged from the auger. This then allows the auger to move through the unloader cup and into conveyor tube 17 not completely filled thereby minimizing the tendency to jam. As discussed above, it is when the auger is filled that jamming of the system is likely to occur. Also, fresh feed within the intake cup may be mixed with the dislodged jammed feed.
As shown in FIG. 3b, a plate 47 is cantilevered from sheet 46 so as to extend above and along side a portion of auger 18 so as to prevent feed dislodged from the auger by gear teeth 66 from falling back into the auger. This aids in preventing jamming of the auger.
It will be understood that if gear 58" is moved toward or away from the center line of auger 18, the amount of feed positively dislodged from the auger may be regulated. More specifically, if gear 58" is moved in toward the centerline of the auger, teeth 66 will penetrate the auger to a greater extent and more feed will be displaced from between the flights.
It will be understood that while gear 58 is shown to be formed of relatively heavy sheet metal with gear teeth 66 bent therefrom, gear 58" may be molded from a suitable plastic. If gear 58" is molded of plastic, it may be desirable that the planar body of the gear be of a thickness corresponding generally to the thickness that its gear teeth 66 are "bent" out of the plane of the gear body. In other words, if the bent teeth 66 are bent out of the plane of the gear body 5/8 inch, the molded gear may have a thickness of 5/8 inches.
It will be appreciated that with the gear agitators 58 and 58" described above in regard to Figs. 3A and 3B, auger 18 may either be linearly driven in tube 17 by a gear drive system as described in the above-noted U.S. Patent 4,460,230, or may be rotary driven.
It will be appreciated that due to the construction of the intake cup 14 of the present invention and the operation of gears 58 or 58", the feed conveyor may be operated without jamming after all of the feed stations 22 have been completely filled.
This insures that conveyor tube 17 is charged with feed between each of the feeders 22.
Thus, upon startup of the conveyor system, feed is delivered simultaneously to all of the feeders thereby preventing the birds in a poultry house from being attracted to only a few of the first feeding stations to receive fresh feed. .
Referring now to Figs. 4-6, a second and gearless embodiment of the feed intake cup and agitator is indicated generally 114. As before, cup 114 transfers or unloads feed from hopper 12 to conveyor 16 so the feed can be delivered to the feed stations 22. Cup 114 includes a housing 124 having an inlet I' which is connected to the -WO 94/15453 'r' PCTIUS93/12226 outlet of hopper 12 for feed to flow into the housing through the inlet.
Housing 124 has an upper rectangular shaped section '126 comprised of side walls 128. The upper end of the side walls define housing intake I'. The lower reaches of the side walls are angled to form a second and generally tapered section 132 for flowing the feed into housing outlet O'. As shown in Figs. 4 and 5, bolts (or rods) B 1 and B2 extend transversely of the centerline of the outlet across the housing. The bolts are located adjacent the respective end walls of the housing. The bolts are secured to the housing by nuts N. It will be noted that the bolts also act to stir the feed since the feed flowing into the outlet end of the housing must divert itself around the bolts, and then recombine.
The feed conveyor is connected to outlet O' for feed flowing through the housing to flow into the conveyor. The conveyor includes a hollow tube defined by a rounded section 13 8 of the housing walls formed at the lower end of the housing. Auger 18 is located in this tube for movement as previously described. Like cup 14, cup 114 includes an agitation means 140 positioned in the housing and movable by auger 18. As with the agitator paddles or blades 50, 52, means 140 agitates the feed to prevent the aforementioned compaction problem within housing 124. Agitation means 140 includes an agitator weight, preferably a ball 144, installed in the housing. The ball is sized to fit in outlet O', and as best seen in Figs. SA-SC, rests upon the upper portion of auger flights 62. The diameter of the ball is greater than the spacing of the flights of the auger.
Consequently, ball 144 is caused to rotate and to move up and down (bounce) by movement of the flights 62 as auger 18 is propelled either linearly or rotatably. It will be understood that while linear movement of auger 18 is preferred, agitator 140 will work with rotary driven augers as well. Ball 144 is a relatively heavy metal ball so that it will bear against the flights of the auger and to be bounced up and down as the auger moves. As shown in Fig. 6A, the ball may be hollow and has an opening 146 formed in it. A hollow ball imposes less weight on the housing than a solid ball so the housing walls do not have to be reinforced and prevents undue compaction of the feed due to the weight of the ball.
Referring to Figs. 7 and 8, cup 114 further includes a frame 148 mountable in housing 124 for limiting movement of the ball so that the ball does not become dislodged from the auger. Frame 148 includes side pieces 150 which are connected together by bolts 152. The bolts are inserted through openings 154 in the side pieces and the bolts are secured to the side pieces by nuts 156 attached to each end of the bolts. As seen in Fig. 7, frame 148, when installed in the housing is positioned such that the spacing between the bolts somewhat greater than the diameter of the ball.
This holds the ball captive and keeps the ball generally in register with the auger flights, and .. . ~ . . .. .
2Z~~2~.~
allows the ball to freely contact the auger flights. As shown in Fig. 8, the side pieces 150 each have an upper main body portion 158 in which the spaced openings 154 are formed. A pair of legs 160 depend from the sides of the main body. The legs are spaced apart such that when the frame is positioned in the housing, the base of the legs S rest upon the transversely extending bolts B 1, B2. The main body portion of the side pieces then keep the ball from being rolled up the tapering side walls of the housing.
Finally, sleeves 162 can be fitted over the bolts 152 as shown for the left-hand bolt in Fig. 7. Each sleeve is of a plastic material which not only protects the bolts from damage by contact with the ball; but also, prevents any moisture in the feed from 10 contacting the bolt and causing it to rust and prevent the feed from sticking to the bolts.
Referring to Fig. SB, agitation means 140 is shown to include a ball 144a.
Unlike the ball 144 shown in Fig. 6A, ball 144a has an elongate rod 164 fixed to the ball and extending upwardly therefrom into the upper reaches of the intake cup 114 above auger 18. As the ball moves up and down due to movement of auger 18, the ball and the rod are repeatedly move (oscillate) about and churn the feed falling into the outlet portion of the cup. In addition, the upper end of the rod may be flattened, as indicated at 166. A chain may be attached to this flattened end of the rod. The outer end of the chain is connected to a sidewall of the housing, at the upper end of the housing by a crossbar 170. Since the chain is connected to the free end of the rod, the chain tethers the rod in a generally desired vertical position, but allows the ball and the rod to be moved freely by the auger. Further, the chain provides a flailing action as this upper end of the rod moves around in the housing. This provides a further stirring action to the feed. In addition, if the feed were to bridge over any portion of hopper 14 or intake cup 12 so that feed could not flow down into the outlet O, the flailing action of the rod or chain would readily breakup any such bridging of the feed to reestablish the flow of feed.
While rod 164 is shown in FIG. SB as being supported by a single chain 168, it will be understood that multiple chains may be used or even preferred to maintain the rod in its desired upright position and to further agitate the feed.
As shown in Fig. SC, the length of the rod can be longer than that shown in Fig. SB. Here, a rod 164a is attached to ball 144a so as to extend well up into hopper 114. A guide ring 172 is centrally positioned in this upper end of the housing. The ring is located in place by respective arms 174a, 174b. The upper end of rod 164a extends through the guide ring. Now, as ball 144a moves about, the upper end of the rod executes a swirling motion which is generally circular. The extent of this motion defined by the extent to which the upper end of the rod extends through the guide ring and the ~WO 94/15453 ~ ~ PCT/US93/12226 diameter of the guide ring. In any event, the result is to provide a stirring motion for the feed flowing through the cup.
With the above described embodiments using the ball 144 or 144a (as shown in Figs. 4-7), it will be understood that the ball could be of different diameters.
The constraint is that the diameter be large enough that the ball not slip between adjacent flights 62 of auger 18 and block its operation. On the other hand, the diameter cannot be so great that an adequate continuous flow of feed into the outlet of the cup is prevented. Similarly, the length of rod 164 can be of any of a range of lengths. The constraint is that it cannot be so short as to allow itself to fall between adjacent flights of the auger. Again, this would jam the auger.
While the balls 144, 144a are shown to be positioned above the centerline of auger 18, it will be appreciated that in certain designs of the intake cup 114, the balls may be located off the vertical centerline of the auger between about approximately the 10 O'clock or 2 O'clock positions. It will be understood that if ball 144 is located off the centerline of auger 18, the auger will impart not only vertical movement to the ball, but the ball will also be rotated.
Referring now to Fig. 15, a bulk feed tank BFT is shown located proximate a poultry hose H in which feeding system 10 is installed. Typically, such bulk feed tanks (or other storage silos or bins) are used in conjunction with feeding system 10 to store large quantities of feed and to supply the intake feed cups 14 and previously described. As shown, the bulk feed tank has a raised tank body 201 with a downwardly converging outlet section 203. At the bottom end of the outlet section, an outlet boot 205 is provided for directing feed from within the tank into a feed supply auger conveyor 207.
The feed supply auger conveyor 207 has a conveyor tube 209 in which a rotary driven auger 211 is driven by a motor 213. The auger conveyor supplies feed by means of drop tubes 215 to the intake cups 14 and 114 located within the poultry house.
A portion of the auger within boot 205 is open to feed in the lower reaches of the outlet section 203.
As best shown in Fig. 16, a ball agitator 217 (similar to agitators 140 previously described in regard to Figs. 4 - 8) is provided within boot 205 and outlet section 203 so as to agitate the feed therein and to insure the free flow of feed to auger 211. More particularly, ball agitator 217 comprises a ball weight 219 positioned within outlet boot 205 in position to bear on the exposed section of auger 211 such that the ball weight will be bounced up and down and in other manners upon rotation of the auger by drive motor 2I3. The ball weight may be provided with a rod agitator similar to rods 164 or 164a previously described, except the agitator rod for a bulk feed tank may be considerably Longer than the rods used in an intake cup application. For example, an agitator rod for a bulk feed tank my be 6 - 10 feet long. Of course, the agitator sod 221 may be guided by either a fixed ring collar 223 (similar to collar 172) supported within outlet section 203 by arms 225, or by a tether chain (not shown in Fig.
16) similar to chain 168 in the manner heretofore described in regard to Figs SB and SC.
Further, the agitator rod 221 may optionally be provided with arms or pegs 227 which extend out from the rod at various positions therealong so as to engage and to stir more feed than an agitator rod without the arms could contact upon the ball weight being moved (oscillated) by the auger.
As previously noted, rod 221 may be several feet long so as to extend a considerable distance above auger 211. As the rod 221 oscillates up and down, compacted feed within outlet 203 is caused to fall downward around rod 221 toward the auger thus forming an inverted cone-shaped area of loosened feed or, in some instances, an inverted cone-shaped opening. Continued up and down movement of rod 221 loosens the compacted feed alt along the length of the rod.
It will be appreciated that by using the ball agitator 217 and rod 221 within a bulk feed tank, cumbersome unloading flails and other unloaders previously used with bulk feed tanks may be eliminated. Upon start up of the auger drive motor 213, ball agitator will automatically be operated. Alternatively, it will be appreciated that in some bulk feed tank applications or the like, the ball agitator above described may employ drive other than an auger. For example, the ball agitator may be bounced up and down or otherwise oscillated by means of a rotary driven cam or other oscillatory drive.
In conjunction with or separate from the use of ball agitator 217 in boot 205, a bent gear agitator (not shown in Figs. 15 or 16) similar to gear 58"
described in conjunction with Figs. 3B and 3C above may be employed. More specifically, the bent gear teeth 66 of gear 58" are engaged by auger 211 such that rotation of the auger by drive motor 213 causes the gear 58" to rotate. Thus the bent gear teeth 66 positively draw feed from boot 205 into the auger, and, if such auger becomes filled with compacted feed, tends to dig out the compacted feed.
In addition to use of the gear driven agitators 48 in cup 14, or the agitator 142 of cup 114, the present invention may further be constituted by multiple diameter agitator or regulator tube 300 (see Figs. 9-13) which is insertable through the outlet portion of housing 24 or 124. Auger 18 extends through tube 300 and is movable therein, reciprocally or rotatably, to transport feed through conveyor 16. As seen best in Figs. 10 and 11, tube 300 has three sections, as indicated at 302, 304, and 306, WO 94!15453 ~ ~ ~ ~ ~ PCT/US93/12226 respectively, with a narrow cutout 308 being made between sections 302 and 304, and a substantially longer cutout 310 between sections 304 and 306. As indicated in Fig. 10, tube 300 the auger enters the tube at its left hand end and exits from the right hand end.
Auger 18 may, for example, have an outer diameter of about 1.438 inches (3.65 cm).
Tube 300 has a uniform outer diameter A along its length. This diameter may, for example, be 1.75 in. (4.45 cm.) and the radius 0.875 in. (2.22 cm). The wall thickness at the inlet end 302 of the tube is indicated B and is (for example) 0.035 in.
(0.089 cm).
This means the inside diameter of the pipe, at its inlet end 302 is 1.68 in.
(4.27 cm) which is considerably larger than the outer diameter of auger 18. In addition, the distance from the lower outer wall of the tube to the upper inner wall thereof, dimension C in Fig. 10, is 1.715 in. (4.36 cm). As can be seen in Fig. 13, the inner diameter of the inlet section 302 of tube 300 is approximately the same as the inner diameter of conveyor tube 17. The later has a flared, bell end 1T sized to be received on the end of section 302 to connect the conveyor tube to tube 300.
Tube 300 may, for example, have a length of about 12 in. (30.5 cm).
Section 302 is 2.625 in. (6.67 cm) in length. Cut out section 308 is, for example, 1 in.
(2.54 cm) in length. Approximately half way along the length of section 308, or 3.125 in. (7.94 cm) from the inlet end of the tube, the wall thickness of the tube changes from the dimension B value to the thicker wall thickness as indicated by dimension D. This transition in thickness is indicated at 312. The new wall thickness of the tube is, for example, 0.113 in. (0.29 cm), and is uniform throughout the remaining length of the tube.
Tube section 304 is also 1 in. (2.54 cm) in length and has the thicker wall.
The inner diameter of the tube at intermediate uniform section 304 is now reduced to 1.524 in. (3.87 cm), which is only somewhat greater than the 1.438 in. (3.65 cm) diameter of auger 18. It will be appreciated as auger 18 enters section 304, any excess compacted feed carried on the outside of the auger 18 is physically stripped from the auger. In addition, the relatively close tolerance between the inner diameter of stripping section 304 and auger 18 tends to guide the auger as the later passes through tube 300.
Cut out 310 extends for 4.75 in. (12.07 cm), for example. The wall thickness throughout this section is the thicker wall section. Lastly, section 306 is the same length as section 302. The wall thickness at this outlet end of the pipe is the thicker wall thickness. Now, the distance from the lower outer wall of the tube to the upper inner wall, dimension E in Fig. 10, is 1.638 in. (4.16 cm). These dimensions and the corresponding cross sectional areas of the tube, the auger, and the amount of feed in the auger at various locations are shown in Fig. 13.
WO 94/15453 _ , PCT/US93/12226 21~~0221~
The construction of regulator tube 300, as above described, is designed to prevent feed compaction in auger 18. It will be noted that the transition in the tube at 312 from a larger inner diameter to a smaller diameter is located in the cutout section 308 of the tube. Since larger diameter section 302 is at the inlet end of the tube, excess feed which has traveled around the conveyor loop with the auger is subject to a stripping or scraping action as the auger enters intermediate section 304 which is of the smaller diameter so as to scrape the excess feed off the auger. The scraped off feed flows via discharge opening 308 back into the cup. Fresh feed delivered through the cup to the outlet now enters the tube through inlet cutout 310. The scraped off feed is stirred in the with new feed by either gear agitator 48 or by a ball agitator 140, as previously described. As the auger, with the excess feed scraped off and with a full charge of loose, fresh feed from inlet opening 310, enters the smaller diameter scraper section 306 and as the auger moves with the conveyor tube, the feed level within the conveyor tube and excess feed is removed from the auger so as to regulate or meter the amount of feed carried by the auger to a predetermined amount. As the auger enters the full diameter of the conveyor tube 17 which is of a larger cross section than regulator section 306, a void V (see Fig. 13F) is formed in conveyor tube 17 thus insuring that the feed in the conveyor is not jammed and is free to flow into each of the feeding stations 22.
As a result, dual diameter regulator tube 300 performs the feed regulation and compacted feed dislodgment functions earlier described and performed by the gear teeth 60 or 60' of gears 58, 58". Because compacted feed is scrapped from the auger by small diameter section 304, and because the scrapped off excess feed is returned to the interior of the intake cup, the regulator tube 300 functions like a stationary agitator thus eliminating for the need for rotary gears and other moving parts. It will be understood that while discharge opening 308 and inlet opening 310 are shown to be separate from one another, it has been found that a single opening may function as both the discharge and inlet opening.
It will be appreciated that by changing the inner diameter of sections 302 and 304 relative to the diameter of the auger 18, the amount of feed regulation effected by tube 300 may be varied.
With respect to Fig. 12, a tube 300x, is shown to be comprised of two tubes 314 and 316, respectively. Both tubes have identical outer diameters corresponding to the diameter values noted above. Tube 314 has a different inner diameter from that of tube 316. Again, these diameter values correspond with those discussed for tube 300. The length of the tubes correspond to the respective lengths of WO 94/15453 ~ ~ ~ ~ PCT/US93112226 the larger and smaller diameter sections of the tube 300. Tubes 314 and 316 are connected together, for example, by welding as indicated at 318. While tubes 314 and 316 could be joined together to form the tube, a single tube may be preferable for use in the conveying system. This is because a single tube is easier to align during installation, 5 and does not require as many welds to connect to the housing of cup 14 or 114, and the conveyor tube 17.
Referring now to Fig. 13 and to Figs. 13A - 13F, multiple diameter agitator tube 300 is shown installed in an intake cup 114 (as illustrated in Figs. 4 - 9).
As shown, the ends 302 and 306 of the agitator tube extend from the outlet portion O' 10 of the intake feed cup. These ends have an outer diameter somewhat less than the inner diameter of a flared bell end 1T of a conventional conveyor tube 17 such that with a flared end on the conveyor tube, the flared ends of the conveyor tube may readily be installed on the protruding ends 302 and 306. It will be noted in Fig. 13 that the inner diameter of conveyor tube 17 and the inner diameter of the ends 302 and 306 are 15 approximately the same. As shown, auger 18 extends through the multiple diameter agitator tube 300 and the auger is preferably linearly driven in the direction shown by the arrow in Fig. 13 such that end 302 constitutes and inlet end and such that end 306 constitutes an outlet end.
Referring to Fig. 14, a typical feed conveyor 16 is illustrated having a linearly propelled feed conveyor auger 18 driven by drive motors 20A or 20B.
The latter drive a coarse pitch gear which has teeth in mesh with the flights 62 of auger 18 so as to linearly (axially) drive the auger through the conveyor tube 17. As shown, feed conveyor 16 is an endless loop conveyor. In such conveyor systems, it is necessary to join the ends of auger 18 together, as by brazing or by using a connector.
This creates a double thickness of the auger in the location of the joint. It has been found that as such continuous loop augers circulate feed in the conveyor after the feeders 22 have been filled, a so-called back lagging effect may be encountered. Back lagging is a condition in which feed conveyed with the auger between adjacent flights is spilled over the trailing flight into the space behind and in which feed from the space between a pair of flights moves rearwardly through the center opening of the auger toward the trailing flights. Generally, such back lagging is uniform from flight to flight and does not present a problem (except that the efficiency of the conveyor is diminished).
However,. in the area of the joint between ends of the conveyor, a more serious problem is encountered.
More particularly, the double thickness of the joint between the ends of auger 18 effectively prevents feed from flowing in a backward movement past the joint.
Further, the double thickness of the joint partially blocks the flow of feed through the _~~~~2~1 ' center of the auger. As such, a void will form behind the joint and a solid slug of feed will buildup in front of the joint. With continued operation of the conveyor after the feeders have been filled, and with additional feed being supplied to the auger from feed cups 14, the slug of compacted feed carried along with the joint will grow (increase in length). Of course, the more compact the feed becomes in this slug and the longer the slug becomes, the more friction it creates as it moves through conveyor tube 17 thus increasing the amount of power required to drive the auger around the conveyor loop.
Referring to Fig. 14, a test conveyor loop CL is shown having a test length of about 70 feet and a width of about 10 feet. The test loop has two auger drive motors, as shown at 20A and 20B, and a pair of intake feed cups 14 of the present invention installed in the conveyor loop. The turns of the conveyor are shown to be 90 degree corners and are indicated at C. The conveyor loop CL has a conveyor tube 16 and an auger 18, as previously described.
In a first test, the conveyor was driven only by drive motor 20A and was 1 S operated for about 15 minutes to with no feed in conveyor tube 17 and with no feed in the feed cups 14 so as to establish a steady state no load condition. The current supplied to drive motor 20A was measured to be 4.3 amps. Feed was then supplied to intake cups 14 so as to fill the conveyor and an excess supply of feed was maintained in each of the feed cups so as to continue to add feed to the conveyor. As the feed was added, the current required by drive motor 20A increased to 5.3 amps. As the filled conveyor continued to circulate for about 15 minutes, the current required by the drive motor increased to 7.1 amps at which point the conveyor would jam and the drive motor would be unable to continue to drive the auger in the conveyor tube. Under such high load conditions, even if the auger did not jam in the conveyor tube, if the drive motor would be shut off, the auger could not be re-started. In accordance with this invention, a re-leveling box 401 was placed in conveyor tube 17 upstream from drive motor so as to breakup the slug of feed in the conveyor and to prevent jamming. More specifically, re-leveling box 401 comprises either a dual diameter metering tube 300 or a gear 58 or 58" agitator and an accumulator supply hopper 403 with the metering tube or - 30 the gear agitator positioned so as to positively break up the slug of feed in the conveyor, to strip excess feed from the auger as the later passes through the re-leveling box, and to resupply the stripped feed to feed voids in the auger as they present themselves while moving through the re-leveling box. More particularly, if metering tube 300 is used, as the slug of compacted feed moves therethrough, excess feed is stripped from the auger by the stripping section 304 and the stripped feed is directed into the hopper 403 via discharge passage 308 to await the passage of a void in the auger. The feed in the WO 9.iI15453 PCTlUS93112226 hopper 403 with then flow into the void via passage 310 In this manner, the compacted slug of feed is broken up each time it passes through the re-leveling box and the trailing void is refilled. In tests with the test loop CL as above described, it has been found that with the conveyor filled with feed and with the intake cups constantly supplying additional feed to the conveyor, the conveyor would reach a steady state conditions in which the drive motor 20A would draw only about 5.3 amps and would maintain this even when the auger was continued to be driven for up to four hours with no increase in current to drive motor 20A.
If a bent gear _'i8" is. used in place of the dual diameter tube 300 in re-leveling box 401, it will be understood that the gear is mounted in the re-leveling box such that the gear is free to rotate with gear teeth in mesh with the auger as it passes therethrough. Thus, teeth 66 tend to dislodge compacted feed from between the flights 62 of the auger and to form a void in which fresh feed or dislodged feed may flow so as to prevent the buildup of a slug of feed which will result in jamming of the conveyor.
What has been described is an improved feed intake cup for use in a poultry feeder system by which feed is delivered from a hopper to a feed conveyor by which the feed is conveyed to a plurality of feeding sites. The conveyor system uses an auger for moving the feed and improved intake cup prevents the auger being jammed.
The intake cup, as described above, simply and easily prevents compaction of feed which would otherwise cause the jamming. It does this by jolting the auger as it moves through the cup, or by turning a pair of paddles to agitate, by vibration of the auger or stirring of the feed, the feed delivered to the auger. An important feature of the cup is the dual diameter tube in which the feed drive auger is positioned. By installing the tube so the auger is driven from the larger into the smaller diameter portion of the tube, excess feed can be removed from the conveyor rather than being constantly recirculated.
This also helps prevent compaction of the feed and potential jamming.
Additionally, the dual diameter regulating tube has no moving parts and thus is simple to construct and to operate.
As various changes could be made in the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Background of the Invention This invention relates to animal or poultry feeding systems in which a . 5 pulverant, fluent feed is conveyed to a series of feeding stations where it is dispensed for chickens (or other animals or birds) to eat, and, more particularly, to a feed intake unit to which the feedstock is delivered and from which it is conveyed.
Poultry feeding systems are well-known in the art. See, for example, U.S.
Patent Nos. 4,850,307; 4,460,230; 4,003,339; 3,971,340; 3,598,087; 3,415,228;
and 3,230,933. As shown in these representative patents, feedstock from a bulk feed tank or the like is delivered to an intake cup or hopper. From the hopper, the feed is delivered to a conveyor which services a number of feeding stations. In large poultry houses, one of these conveyors may have a length of up to 400 feet and there may be 200-300 or so of the feeding stations. The feed is conveyed, usually by means of an auger received in a feed conveyor tube extending through each of the feed stations. The auger may either be rotary driven or axially propelled within the tube to convey the feed from the intake cup and from feeder to feeder. Feed is deposited from the conveyor into feed pans of the feeders located at each station for subsequent consumption by the birds.
It is a problem with present feeding systems that they can become overloaded and jammed up with feed. This situation is likely to occur, for example, when the feeders are full. Then a substantial amount of feed is retained in the conveyor loop. At the same time, additional feed is being dispensed from the hopper into the conveyor. When that happens, the pressures created compact the feed in the conveyor loop until all void spaces are filled or packed. The resultant pressures eventually cause the auger to jam and stop moving. For example, in certain of the prior art feeding systems (such as shown in U.S. Patent 4,850,307), it is a feature of these systems that voids are intentionally formed between the flights of the auger within the conveyor tube through the use of bailles within the intake cup so as to restrict the flow of feed to the auger. However, it has been found that if no feed is being dispensed to the feed stations and as the conveyor is run continuously, these voids tend to become overfilled as more feed is delivered to the auger. The feed at the inlet to the conveyor is also compacted, as is the feed above it. In this latter regard, even if the feed at the inlet to the conveyor is broken up, the compacted feed above it may create a solid bridge preventing any feed from reaching the conveyor from the hopper.
If the further delivery of feed to the conveyor system ultimately jams the auger, the conveyor feed tube must be disassembled, the compacted feed cleaned out, and everything then reassembled. The feed intake to the conveyor must also be cleaned out to break up deposits of compacted feed. This is not only a time consuming and expensive process, but it means the poultry is either not fed, or must be fed by hand or in some other manner during the down time.
Summary of the Invention In one aspect, the invention provides a feed intake apparatus for a poultry or livestock feeding system, the apparatus comprising at least one housing having a feed inlet which receives feed from a feed supply and a feed outlet, a feed conveyor extending from the housing in an endless loop and returning to the housing, a plurality of feeders spaced along the endless loop, the feed conveyor comprising a conveyor tube and a conveyor element disposed within the tube, the conveyor element having a multiplicity of conveying elements spaced therealong, the conveyor element being axially driven within the conveyor tube around the endless loop for picking up feed from the housing and for conveying it through the conveyor tube to each of the feeders along the conveyor path and for returning any excess feed to the housing, and a regulating tube within the feed outlet receiving an auger, the regulating tube including a regulating section having a diameter only somewhat greater than the diameter of the auger thereby to regulate the amount of feed carned by the auger and to insure that a partial void is provided in the conveyor tube downstream from the feed intake apparatus thereby positively preventing over compaction of feed in the conveyor tube. The regulating tube may further comprise a striping section upstream from the regulating section having a diameter only somewhat larger than the diameter of the auger for stripping excess feed carned by the auger. The regulating tube may have a discharge outlet upstream from the feed striping section for the discharge of the excess feed striped from the auger by the striping section. Suitably, the tube has a feed inlet opening intermediate the striping section and the regulating section for directing feed into the auger upstream of the regulating section thereby to insure the supply of fresh feed to the conveyor. Preferably, the conveyor element is an auger housed within the conveyor tube, the feed auger having a multiplicity of substantially equally spaced flights with at least some of the auger flights within the feed intake apparatus being open from above, the apparatus further comprising an agitator member engageable with the auger flights as the latter move through the housing so as to effect intermittent movement of the agitator member relative to the auger. Preferably, the agitator member has an elongate member extending therefrom into the housing for agitating feed within the housing so as to insure that the feed flows to the regulating tube for being picked up by the auger and conveyed by the feed conveyor.
In a further aspect, the invention provides a method of conveying feed from a bulk supply of the feed to a plurality of feeders by means of a feed conveying system, the feed conveying system comprising a housing for receiving a supply of feed, a conveyor tube extending along a feed conveyor path from the housing to a multiplicity of feeders spaced along the conveyor tube with each of the feeders receiving feed from the feed conveying system, the feed conveyor path extending in an endless loop and returning to the housing, a feed conveying element disposed within the feed conveyor tube and being axially propelled therewithin around the endless loop, wherein the method comprises the steps of:
(a) axially propelling the feed conveying element through the feed conveying tube and around the endless loop to pick up feed from the housing and for delivering feed to each of the feeders around the endless loop and thence returning any excess feed to the housing;
(b) regulating the amount of :feed carried by the feed conveying element downstream from the housing to an amount less than will fill the feed conveyor tube so as to form a partial void within the feed conveyor tube; and (c) continuously driving the feed conveying element through the feed conveyor tube after all of the feeders have been filled with feed so as to replenish feed within the feeders as such feed is consumed without jamming the feed conveying element within the feed conveyor tube.
Brief Description of the Drawings Fig. 1 is a representation of a portion of a poultry feed delivery system with which the intake cup of the present invention is used;
Fig. 2 is a top plan view of the cup with a paddle or stirring assembly used in the first embodiment of the invention;
Fig. 3A is a sectional view of the cup taken along line 3-3 in Fig. 2;
Fig. 3B is a sectional view of another embodiment of the cup of Fig. 3;
Fig. 3C is a view (see sheet 7) on, an enlarged scale taken along line 3C - -3C of Fig. 3B
illustrating a gear having teeth bent out of the plane of the gear with the gear driven by the 3a conveyor auger;
Fig. 3D is a view similar to Fig. 3C wherein the gear teeth have enlarged end portions interengageable with the flights of the anger so as to aid in the breaking up of compacted feed between the flights;
Fig. 3E is a view taken along line 3E - - 3E of Fig. 3C illustrating in plan manner in which the bent gear teeth mesh with the auger to dislodge compacted feed and to regulate the amount of feed;
WO 94/15453 { ~ , _ ~ PCTIUS93112226 Fig. 4 is a top plan view of the cup with a ball installed in the cup and used in a second embodiment of the invention;
Fig. SA is a sectional view of the cup taken along line S-5 in Fig. 4;
Figs. SB and SC illustrate additional ball configurations for the second embodiment;
Figs. 6A and 6B are, respectively, a perspective view of the ball (Fig. 6A) and a combined ball and agitator rod (Fig. 6B);
Fig. 7 is a plan view of the cup of Fig. 4 with portions of the ball broken away a frame installed in the housing of the cup for holding the ball agitator in a desired position with respect to the auger;
Fig. 8 is a side elevational view of one side member of the frame;
Fig. 9 is a plan view of the cup housing with a multiple diameter regulator tube of the invention installed;
Fig. 10 is a side view of the tube;
Fig. 11 is a top view of the tube; and Fig. 12 is a side view of a second embodiment of the tube;
Fig. 13 is a side elevational view of the lower portion of an intake feed cup of the present invention incorporating the regulator tube of Figs. 9-12 illustrating the conveyor tube having a flared bell end adapted to be received on an inlet tube and on an outlet tube of the intake housing;
Fig. 13A-13F illustrate the various diameters of the agitator tube and their relation to the diameter of the conveyor tube and the auger so as to loosen compacted feed, to supply fresh feed, and to form a void (regulate) in the conveyor tube to prevent over filling;
Fig. 14 is a semi-diagrammatic view of a feed delivery and feeder system using multiple conveyor drives and multiple feed intake cups of the present invention;
Fig. 15 is a view of a bulk feed tank which supplies feed to the intake feed cup of Fig. 1 with the bulk feed tank having an outlet boot at the bottom thereof with a rotary driven auger within the boot and with an agitator in the boot similar to the agitator disclosed above in regard to Figs.
4-8; and Fig 16 is an enlarged view taken on line 16--16 of Fig. 15 illustrating a ball agitator/rod for breaking up compacted feed within the outlet or boot portions of the bulk feed tank.
Corresponding reference characters indicate corresponding parts throughout the drawings.
~WO 94/15453 ~ ~ PCTIUS93/12226 Description of Preferred Embodiments Referring to the drawings, a poultry feeding system is indicated generally in Figs. 1 and 14. System 10 includes a hopper 12 into which feed is received from a bulk feed tank BFT or the like (see Fig. 15). From hopper 12, the feed gravitates (falls) 5 into an intake or hopper unloader cup 14 which comprises the present invention and which is described in detail hereinafter. From cup 14, the feed enters a conveyor 16.
The latter includes a conveyor tube 17 in which an auger 18 is located.
Preferably, auger 18 is a centerless auger having the appearance of a stretched out coil spring.
Auger 18 driven by a drive mechanism 20 to cause the feed to be transferred by 10 conveyor 16 to one or more feed stations 22. Auger 18 may be rotatably or linearly driven by the drive mechanism. Auger 18 may be linearly propelled through tube 17 by means of a drive gear having gear teeth in mesh with the flight of the auger.
Such a drive is described in U.S. Patent 4,460,230.
Alternatively, the auger maybe rotary driven within the conveyor tube such that the auger acts like a screw to convey the feed through the conveyor tube.
Still other well-known feed conveyors (e.g., a chain conveyor) may be used. As shown in Fig. 14, when auger 19 is linearly propelled, conveyor 16 may be an endless closed track system in which the conveyor 16 is arranged in a closed loop configuration around the poultry house. As shown in Fig. 14, additional drive mechanisms 20 and additional intake feed cups 14 may be located along the loop to facilitate movement of feed to the various feeders 22.
In delivering feed to feeders 22, one problem which is encountered is feed compaction. Compaction is usually caused by an over abundance of feed being conveyed through the system. If, for example, feed currently in the conveyor is not deposited at a station because the feed already there has not been consumed, excess feed in the conveyor will be circulated back to cup 14. At the same time, additional feed flows from hopper 12 into cup 14 for entry into the conveyor. Since the flow of feed through the cup is by gravity, the feed will exert a substantial amount of "hydrostatic"
pressure on the feed so as to pack even more feed into the feed conveyor. And, since the excess feed in the conveyor is being constantly recirculated throughout the feed loop, rather than deposited at the stations, it often becomes more and more compacted until jamming occurs. If the conveying system gets jammed, it must be disassembled by removing the auger from the conveyor tube, the compacted feed cleaned out, and the system then reassembled. This creates a time consuming and expensive delay especially considering the number of birds fed by the system, and the amount of wasted feed which WO 94/15453 . PCTJUS93/12226 ' -is created by the jam. Intake cup 14 of the present invention alleviates feed compaction, and thus eliminates the attendant time delay and cost.
In Figs. 2 and 3A, a first embodiment of the intake cup is shown to include a housing 24. The housing has a generally rectangular upper end 26 the side walls 28 of which define a feed inlet I. Respective flanges 30 are formed at the upper end of each side wall for attachment of the intake to the bottom or outlet end of hopper 12. It will be appreciated that feed may be supplied to cup 14 by means other than hopper 14. For example, feed may be supplied by means of a suitable drop tube (not shown).
Side walls 28 of housing 24 also have a lower tapered section 32 for the lower end of the housing to define an outlet O into which feed flows from the intake cup 14 into conveyor 16.
Feed conveyor 16 is connected to housing outlet O for the feed flowing through the housing to flow into the conveyor. The conveyor includes conveyor tube 17 having an inlet end at the outlet of the housing and a series of spaced outlets 36, one at each feed station 22. The lower end of section 32 of housing 24 has a rounded semi-cylindrical base portion, as indicated at 38 in Fig. 3A. In addition to helping to define outlet O of the intake cup, base portion 38 also provides a housing for auger 18.
The auger moves rotatably in or linearly through housing section 38 for conveying feed falling from the hopper to be delivered to the conveyor and to be distributed to the outlets 36. Alternately, and as described hereinafter, a multiple diameter tube 40, see Figs. 9-11, may be installed through openings 42 in the lower sidewall of the housing, and auger 18 is movable axially through this tube. The multiple diameter tube 40 serves to permit more feed from within housing 24 to enter the conveyor and also serves to prevent over filling and/or over compaction of the feed in a manner as will appear.
Referring to Fig. 3A, an optional baffle 44 within housing 24 has one end attached to a side wall 28 of the housing at the upper end of the housing.
Baffle 44 angles downwardly into the housing to form a chute for the feed F delivered to cup 14 from the hopper. In addition to baffle 44, a support plate 46 is also attached to a side wall 28 of the cup housing. The upper end of plate 46 is, as shown in Fig. 3A, attached to the same side wall 28 as is the upper end of baffle 44, so the baffle and plate depend - 30 from the same side of the housing. Baffle 44 overhangs plate 46 minimize the effect of "hydrostatic" pressure of the feed in the intake cup and hopper 12 from over compacting the feed. Or, as shown in Fig. 2, baffle 44 does not have to be used.
An agitator 48 is positioned in the tapered lower end of housing 24 so as to agitate the feed falling into the outlet of the intake cup. By churning or stirring the feed within housing 24, it will not be easily compacted and therefore will not bridge within the housing and will thus flow continuously down toward the conveyor.
Agitator WO 94115453 ~ PCTIUS93/12226 :a ..,, :f. , .. .
48 first includes a pair of rotatable blades 50 and 52, respectively, commonly mounted for rotation on a shaft 54. The stirring blades are mounted on the shaft so they are at a 90_ angle to each other as shown in Fig. 2. Shaft 54 extends through support plate 46 and is rotatably supported on the plate 46 and on housing 24 by bearings 56. A
gear 58 is fixedly mounted on shaft 54. The gear is located such that its teeth 60 extend into the outlet portion 38 of the housing. The teeth mesh with flights 62 of auger 18 (see Fig.
3C). Consequently, movement (either axially or rotary) of the auger turns the gear, and rotation of the gear causes rotation of the agitator blades 50, 52. This produces the stirring action discussed above. In operation, upper blade 50 of the blade assembly promotes flowability of feed from the hopper, and the lower blade 52 provides agitation of the feed to keep it flowing into the outlet. As gear teeth 60 move in and out of mesh with the flights 62 of auger 18, the gear teeth move in toward the center of the auger and thus physically break up compacted feed carried by the auger. Thus, the gear teeth tend to prevent over compaction, over filling, and jamming of the conveyor.
Further, as ~ excess, compacted feed is dislodged from the auger by the gear teeth, fresh feed is re-mixed therewith such that fresh, loose feed is conveyed from the feed cup to feeders 22.
It will be appreciated that teeth 60 of gear 58 may be enlarged and may be of a bulbous shape so as to fit more closely between the flights 62 of auger 18 thereby to aid in breaking out compacted feed within the auger and to insure proper conveyor filling and to reduce or nunimize the possibility of jamming the conveyor.
Figs. 3B and 3C illustrate an alternate embodiment of agitator means 48 from that shown in Fig. 3A. In Fig. 3B, a gear 58" (a third rotatable stirring blade) mounted on shaft 54. The teeth 66 of gear 58" are angled or bent with respect to the body of the gear for contact with flights 62 of auger 18. Now, as the auger is moved, the bent gear teeth 66 are engaged by the moving auger 18 thus causing gear 58" to be rotated in the appropriate direction producing, in turn, rotation of blades 50 and 52.
Blades 50 and 52 function as previously described. Bent gear 58" provides the additional feature of regulating feed level. This is important when, for example, the auger is completely filled with feed. Through use of bent gear 58", as the bent gear teeth 66 move down into, across, and up out of the space between the flights 62 of conveyor 18, so as to dig out compacted feed thus resulting in a positive displacement of excess feed. In Fig. 3C, the bent gear 58" is shown in side elevation and it can be seen that bent gear teeth 66 move down and into the auger below the centerline thereof.
Simultaneously, as shown in Fig. 3F, the teeth sweep horizontally across the auger. In this manner, compacted feed within the auger is positively broken up, dislodged and is WO 94/15453 ' y : . : PCTIUS93112226 physically discharged from the auger. This then allows the auger to move through the unloader cup and into conveyor tube 17 not completely filled thereby minimizing the tendency to jam. As discussed above, it is when the auger is filled that jamming of the system is likely to occur. Also, fresh feed within the intake cup may be mixed with the dislodged jammed feed.
As shown in FIG. 3b, a plate 47 is cantilevered from sheet 46 so as to extend above and along side a portion of auger 18 so as to prevent feed dislodged from the auger by gear teeth 66 from falling back into the auger. This aids in preventing jamming of the auger.
It will be understood that if gear 58" is moved toward or away from the center line of auger 18, the amount of feed positively dislodged from the auger may be regulated. More specifically, if gear 58" is moved in toward the centerline of the auger, teeth 66 will penetrate the auger to a greater extent and more feed will be displaced from between the flights.
It will be understood that while gear 58 is shown to be formed of relatively heavy sheet metal with gear teeth 66 bent therefrom, gear 58" may be molded from a suitable plastic. If gear 58" is molded of plastic, it may be desirable that the planar body of the gear be of a thickness corresponding generally to the thickness that its gear teeth 66 are "bent" out of the plane of the gear body. In other words, if the bent teeth 66 are bent out of the plane of the gear body 5/8 inch, the molded gear may have a thickness of 5/8 inches.
It will be appreciated that with the gear agitators 58 and 58" described above in regard to Figs. 3A and 3B, auger 18 may either be linearly driven in tube 17 by a gear drive system as described in the above-noted U.S. Patent 4,460,230, or may be rotary driven.
It will be appreciated that due to the construction of the intake cup 14 of the present invention and the operation of gears 58 or 58", the feed conveyor may be operated without jamming after all of the feed stations 22 have been completely filled.
This insures that conveyor tube 17 is charged with feed between each of the feeders 22.
Thus, upon startup of the conveyor system, feed is delivered simultaneously to all of the feeders thereby preventing the birds in a poultry house from being attracted to only a few of the first feeding stations to receive fresh feed. .
Referring now to Figs. 4-6, a second and gearless embodiment of the feed intake cup and agitator is indicated generally 114. As before, cup 114 transfers or unloads feed from hopper 12 to conveyor 16 so the feed can be delivered to the feed stations 22. Cup 114 includes a housing 124 having an inlet I' which is connected to the -WO 94/15453 'r' PCTIUS93/12226 outlet of hopper 12 for feed to flow into the housing through the inlet.
Housing 124 has an upper rectangular shaped section '126 comprised of side walls 128. The upper end of the side walls define housing intake I'. The lower reaches of the side walls are angled to form a second and generally tapered section 132 for flowing the feed into housing outlet O'. As shown in Figs. 4 and 5, bolts (or rods) B 1 and B2 extend transversely of the centerline of the outlet across the housing. The bolts are located adjacent the respective end walls of the housing. The bolts are secured to the housing by nuts N. It will be noted that the bolts also act to stir the feed since the feed flowing into the outlet end of the housing must divert itself around the bolts, and then recombine.
The feed conveyor is connected to outlet O' for feed flowing through the housing to flow into the conveyor. The conveyor includes a hollow tube defined by a rounded section 13 8 of the housing walls formed at the lower end of the housing. Auger 18 is located in this tube for movement as previously described. Like cup 14, cup 114 includes an agitation means 140 positioned in the housing and movable by auger 18. As with the agitator paddles or blades 50, 52, means 140 agitates the feed to prevent the aforementioned compaction problem within housing 124. Agitation means 140 includes an agitator weight, preferably a ball 144, installed in the housing. The ball is sized to fit in outlet O', and as best seen in Figs. SA-SC, rests upon the upper portion of auger flights 62. The diameter of the ball is greater than the spacing of the flights of the auger.
Consequently, ball 144 is caused to rotate and to move up and down (bounce) by movement of the flights 62 as auger 18 is propelled either linearly or rotatably. It will be understood that while linear movement of auger 18 is preferred, agitator 140 will work with rotary driven augers as well. Ball 144 is a relatively heavy metal ball so that it will bear against the flights of the auger and to be bounced up and down as the auger moves. As shown in Fig. 6A, the ball may be hollow and has an opening 146 formed in it. A hollow ball imposes less weight on the housing than a solid ball so the housing walls do not have to be reinforced and prevents undue compaction of the feed due to the weight of the ball.
Referring to Figs. 7 and 8, cup 114 further includes a frame 148 mountable in housing 124 for limiting movement of the ball so that the ball does not become dislodged from the auger. Frame 148 includes side pieces 150 which are connected together by bolts 152. The bolts are inserted through openings 154 in the side pieces and the bolts are secured to the side pieces by nuts 156 attached to each end of the bolts. As seen in Fig. 7, frame 148, when installed in the housing is positioned such that the spacing between the bolts somewhat greater than the diameter of the ball.
This holds the ball captive and keeps the ball generally in register with the auger flights, and .. . ~ . . .. .
2Z~~2~.~
allows the ball to freely contact the auger flights. As shown in Fig. 8, the side pieces 150 each have an upper main body portion 158 in which the spaced openings 154 are formed. A pair of legs 160 depend from the sides of the main body. The legs are spaced apart such that when the frame is positioned in the housing, the base of the legs S rest upon the transversely extending bolts B 1, B2. The main body portion of the side pieces then keep the ball from being rolled up the tapering side walls of the housing.
Finally, sleeves 162 can be fitted over the bolts 152 as shown for the left-hand bolt in Fig. 7. Each sleeve is of a plastic material which not only protects the bolts from damage by contact with the ball; but also, prevents any moisture in the feed from 10 contacting the bolt and causing it to rust and prevent the feed from sticking to the bolts.
Referring to Fig. SB, agitation means 140 is shown to include a ball 144a.
Unlike the ball 144 shown in Fig. 6A, ball 144a has an elongate rod 164 fixed to the ball and extending upwardly therefrom into the upper reaches of the intake cup 114 above auger 18. As the ball moves up and down due to movement of auger 18, the ball and the rod are repeatedly move (oscillate) about and churn the feed falling into the outlet portion of the cup. In addition, the upper end of the rod may be flattened, as indicated at 166. A chain may be attached to this flattened end of the rod. The outer end of the chain is connected to a sidewall of the housing, at the upper end of the housing by a crossbar 170. Since the chain is connected to the free end of the rod, the chain tethers the rod in a generally desired vertical position, but allows the ball and the rod to be moved freely by the auger. Further, the chain provides a flailing action as this upper end of the rod moves around in the housing. This provides a further stirring action to the feed. In addition, if the feed were to bridge over any portion of hopper 14 or intake cup 12 so that feed could not flow down into the outlet O, the flailing action of the rod or chain would readily breakup any such bridging of the feed to reestablish the flow of feed.
While rod 164 is shown in FIG. SB as being supported by a single chain 168, it will be understood that multiple chains may be used or even preferred to maintain the rod in its desired upright position and to further agitate the feed.
As shown in Fig. SC, the length of the rod can be longer than that shown in Fig. SB. Here, a rod 164a is attached to ball 144a so as to extend well up into hopper 114. A guide ring 172 is centrally positioned in this upper end of the housing. The ring is located in place by respective arms 174a, 174b. The upper end of rod 164a extends through the guide ring. Now, as ball 144a moves about, the upper end of the rod executes a swirling motion which is generally circular. The extent of this motion defined by the extent to which the upper end of the rod extends through the guide ring and the ~WO 94/15453 ~ ~ PCT/US93/12226 diameter of the guide ring. In any event, the result is to provide a stirring motion for the feed flowing through the cup.
With the above described embodiments using the ball 144 or 144a (as shown in Figs. 4-7), it will be understood that the ball could be of different diameters.
The constraint is that the diameter be large enough that the ball not slip between adjacent flights 62 of auger 18 and block its operation. On the other hand, the diameter cannot be so great that an adequate continuous flow of feed into the outlet of the cup is prevented. Similarly, the length of rod 164 can be of any of a range of lengths. The constraint is that it cannot be so short as to allow itself to fall between adjacent flights of the auger. Again, this would jam the auger.
While the balls 144, 144a are shown to be positioned above the centerline of auger 18, it will be appreciated that in certain designs of the intake cup 114, the balls may be located off the vertical centerline of the auger between about approximately the 10 O'clock or 2 O'clock positions. It will be understood that if ball 144 is located off the centerline of auger 18, the auger will impart not only vertical movement to the ball, but the ball will also be rotated.
Referring now to Fig. 15, a bulk feed tank BFT is shown located proximate a poultry hose H in which feeding system 10 is installed. Typically, such bulk feed tanks (or other storage silos or bins) are used in conjunction with feeding system 10 to store large quantities of feed and to supply the intake feed cups 14 and previously described. As shown, the bulk feed tank has a raised tank body 201 with a downwardly converging outlet section 203. At the bottom end of the outlet section, an outlet boot 205 is provided for directing feed from within the tank into a feed supply auger conveyor 207.
The feed supply auger conveyor 207 has a conveyor tube 209 in which a rotary driven auger 211 is driven by a motor 213. The auger conveyor supplies feed by means of drop tubes 215 to the intake cups 14 and 114 located within the poultry house.
A portion of the auger within boot 205 is open to feed in the lower reaches of the outlet section 203.
As best shown in Fig. 16, a ball agitator 217 (similar to agitators 140 previously described in regard to Figs. 4 - 8) is provided within boot 205 and outlet section 203 so as to agitate the feed therein and to insure the free flow of feed to auger 211. More particularly, ball agitator 217 comprises a ball weight 219 positioned within outlet boot 205 in position to bear on the exposed section of auger 211 such that the ball weight will be bounced up and down and in other manners upon rotation of the auger by drive motor 2I3. The ball weight may be provided with a rod agitator similar to rods 164 or 164a previously described, except the agitator rod for a bulk feed tank may be considerably Longer than the rods used in an intake cup application. For example, an agitator rod for a bulk feed tank my be 6 - 10 feet long. Of course, the agitator sod 221 may be guided by either a fixed ring collar 223 (similar to collar 172) supported within outlet section 203 by arms 225, or by a tether chain (not shown in Fig.
16) similar to chain 168 in the manner heretofore described in regard to Figs SB and SC.
Further, the agitator rod 221 may optionally be provided with arms or pegs 227 which extend out from the rod at various positions therealong so as to engage and to stir more feed than an agitator rod without the arms could contact upon the ball weight being moved (oscillated) by the auger.
As previously noted, rod 221 may be several feet long so as to extend a considerable distance above auger 211. As the rod 221 oscillates up and down, compacted feed within outlet 203 is caused to fall downward around rod 221 toward the auger thus forming an inverted cone-shaped area of loosened feed or, in some instances, an inverted cone-shaped opening. Continued up and down movement of rod 221 loosens the compacted feed alt along the length of the rod.
It will be appreciated that by using the ball agitator 217 and rod 221 within a bulk feed tank, cumbersome unloading flails and other unloaders previously used with bulk feed tanks may be eliminated. Upon start up of the auger drive motor 213, ball agitator will automatically be operated. Alternatively, it will be appreciated that in some bulk feed tank applications or the like, the ball agitator above described may employ drive other than an auger. For example, the ball agitator may be bounced up and down or otherwise oscillated by means of a rotary driven cam or other oscillatory drive.
In conjunction with or separate from the use of ball agitator 217 in boot 205, a bent gear agitator (not shown in Figs. 15 or 16) similar to gear 58"
described in conjunction with Figs. 3B and 3C above may be employed. More specifically, the bent gear teeth 66 of gear 58" are engaged by auger 211 such that rotation of the auger by drive motor 213 causes the gear 58" to rotate. Thus the bent gear teeth 66 positively draw feed from boot 205 into the auger, and, if such auger becomes filled with compacted feed, tends to dig out the compacted feed.
In addition to use of the gear driven agitators 48 in cup 14, or the agitator 142 of cup 114, the present invention may further be constituted by multiple diameter agitator or regulator tube 300 (see Figs. 9-13) which is insertable through the outlet portion of housing 24 or 124. Auger 18 extends through tube 300 and is movable therein, reciprocally or rotatably, to transport feed through conveyor 16. As seen best in Figs. 10 and 11, tube 300 has three sections, as indicated at 302, 304, and 306, WO 94!15453 ~ ~ ~ ~ ~ PCT/US93/12226 respectively, with a narrow cutout 308 being made between sections 302 and 304, and a substantially longer cutout 310 between sections 304 and 306. As indicated in Fig. 10, tube 300 the auger enters the tube at its left hand end and exits from the right hand end.
Auger 18 may, for example, have an outer diameter of about 1.438 inches (3.65 cm).
Tube 300 has a uniform outer diameter A along its length. This diameter may, for example, be 1.75 in. (4.45 cm.) and the radius 0.875 in. (2.22 cm). The wall thickness at the inlet end 302 of the tube is indicated B and is (for example) 0.035 in.
(0.089 cm).
This means the inside diameter of the pipe, at its inlet end 302 is 1.68 in.
(4.27 cm) which is considerably larger than the outer diameter of auger 18. In addition, the distance from the lower outer wall of the tube to the upper inner wall thereof, dimension C in Fig. 10, is 1.715 in. (4.36 cm). As can be seen in Fig. 13, the inner diameter of the inlet section 302 of tube 300 is approximately the same as the inner diameter of conveyor tube 17. The later has a flared, bell end 1T sized to be received on the end of section 302 to connect the conveyor tube to tube 300.
Tube 300 may, for example, have a length of about 12 in. (30.5 cm).
Section 302 is 2.625 in. (6.67 cm) in length. Cut out section 308 is, for example, 1 in.
(2.54 cm) in length. Approximately half way along the length of section 308, or 3.125 in. (7.94 cm) from the inlet end of the tube, the wall thickness of the tube changes from the dimension B value to the thicker wall thickness as indicated by dimension D. This transition in thickness is indicated at 312. The new wall thickness of the tube is, for example, 0.113 in. (0.29 cm), and is uniform throughout the remaining length of the tube.
Tube section 304 is also 1 in. (2.54 cm) in length and has the thicker wall.
The inner diameter of the tube at intermediate uniform section 304 is now reduced to 1.524 in. (3.87 cm), which is only somewhat greater than the 1.438 in. (3.65 cm) diameter of auger 18. It will be appreciated as auger 18 enters section 304, any excess compacted feed carried on the outside of the auger 18 is physically stripped from the auger. In addition, the relatively close tolerance between the inner diameter of stripping section 304 and auger 18 tends to guide the auger as the later passes through tube 300.
Cut out 310 extends for 4.75 in. (12.07 cm), for example. The wall thickness throughout this section is the thicker wall section. Lastly, section 306 is the same length as section 302. The wall thickness at this outlet end of the pipe is the thicker wall thickness. Now, the distance from the lower outer wall of the tube to the upper inner wall, dimension E in Fig. 10, is 1.638 in. (4.16 cm). These dimensions and the corresponding cross sectional areas of the tube, the auger, and the amount of feed in the auger at various locations are shown in Fig. 13.
WO 94/15453 _ , PCT/US93/12226 21~~0221~
The construction of regulator tube 300, as above described, is designed to prevent feed compaction in auger 18. It will be noted that the transition in the tube at 312 from a larger inner diameter to a smaller diameter is located in the cutout section 308 of the tube. Since larger diameter section 302 is at the inlet end of the tube, excess feed which has traveled around the conveyor loop with the auger is subject to a stripping or scraping action as the auger enters intermediate section 304 which is of the smaller diameter so as to scrape the excess feed off the auger. The scraped off feed flows via discharge opening 308 back into the cup. Fresh feed delivered through the cup to the outlet now enters the tube through inlet cutout 310. The scraped off feed is stirred in the with new feed by either gear agitator 48 or by a ball agitator 140, as previously described. As the auger, with the excess feed scraped off and with a full charge of loose, fresh feed from inlet opening 310, enters the smaller diameter scraper section 306 and as the auger moves with the conveyor tube, the feed level within the conveyor tube and excess feed is removed from the auger so as to regulate or meter the amount of feed carried by the auger to a predetermined amount. As the auger enters the full diameter of the conveyor tube 17 which is of a larger cross section than regulator section 306, a void V (see Fig. 13F) is formed in conveyor tube 17 thus insuring that the feed in the conveyor is not jammed and is free to flow into each of the feeding stations 22.
As a result, dual diameter regulator tube 300 performs the feed regulation and compacted feed dislodgment functions earlier described and performed by the gear teeth 60 or 60' of gears 58, 58". Because compacted feed is scrapped from the auger by small diameter section 304, and because the scrapped off excess feed is returned to the interior of the intake cup, the regulator tube 300 functions like a stationary agitator thus eliminating for the need for rotary gears and other moving parts. It will be understood that while discharge opening 308 and inlet opening 310 are shown to be separate from one another, it has been found that a single opening may function as both the discharge and inlet opening.
It will be appreciated that by changing the inner diameter of sections 302 and 304 relative to the diameter of the auger 18, the amount of feed regulation effected by tube 300 may be varied.
With respect to Fig. 12, a tube 300x, is shown to be comprised of two tubes 314 and 316, respectively. Both tubes have identical outer diameters corresponding to the diameter values noted above. Tube 314 has a different inner diameter from that of tube 316. Again, these diameter values correspond with those discussed for tube 300. The length of the tubes correspond to the respective lengths of WO 94/15453 ~ ~ ~ ~ PCT/US93112226 the larger and smaller diameter sections of the tube 300. Tubes 314 and 316 are connected together, for example, by welding as indicated at 318. While tubes 314 and 316 could be joined together to form the tube, a single tube may be preferable for use in the conveying system. This is because a single tube is easier to align during installation, 5 and does not require as many welds to connect to the housing of cup 14 or 114, and the conveyor tube 17.
Referring now to Fig. 13 and to Figs. 13A - 13F, multiple diameter agitator tube 300 is shown installed in an intake cup 114 (as illustrated in Figs. 4 - 9).
As shown, the ends 302 and 306 of the agitator tube extend from the outlet portion O' 10 of the intake feed cup. These ends have an outer diameter somewhat less than the inner diameter of a flared bell end 1T of a conventional conveyor tube 17 such that with a flared end on the conveyor tube, the flared ends of the conveyor tube may readily be installed on the protruding ends 302 and 306. It will be noted in Fig. 13 that the inner diameter of conveyor tube 17 and the inner diameter of the ends 302 and 306 are 15 approximately the same. As shown, auger 18 extends through the multiple diameter agitator tube 300 and the auger is preferably linearly driven in the direction shown by the arrow in Fig. 13 such that end 302 constitutes and inlet end and such that end 306 constitutes an outlet end.
Referring to Fig. 14, a typical feed conveyor 16 is illustrated having a linearly propelled feed conveyor auger 18 driven by drive motors 20A or 20B.
The latter drive a coarse pitch gear which has teeth in mesh with the flights 62 of auger 18 so as to linearly (axially) drive the auger through the conveyor tube 17. As shown, feed conveyor 16 is an endless loop conveyor. In such conveyor systems, it is necessary to join the ends of auger 18 together, as by brazing or by using a connector.
This creates a double thickness of the auger in the location of the joint. It has been found that as such continuous loop augers circulate feed in the conveyor after the feeders 22 have been filled, a so-called back lagging effect may be encountered. Back lagging is a condition in which feed conveyed with the auger between adjacent flights is spilled over the trailing flight into the space behind and in which feed from the space between a pair of flights moves rearwardly through the center opening of the auger toward the trailing flights. Generally, such back lagging is uniform from flight to flight and does not present a problem (except that the efficiency of the conveyor is diminished).
However,. in the area of the joint between ends of the conveyor, a more serious problem is encountered.
More particularly, the double thickness of the joint between the ends of auger 18 effectively prevents feed from flowing in a backward movement past the joint.
Further, the double thickness of the joint partially blocks the flow of feed through the _~~~~2~1 ' center of the auger. As such, a void will form behind the joint and a solid slug of feed will buildup in front of the joint. With continued operation of the conveyor after the feeders have been filled, and with additional feed being supplied to the auger from feed cups 14, the slug of compacted feed carried along with the joint will grow (increase in length). Of course, the more compact the feed becomes in this slug and the longer the slug becomes, the more friction it creates as it moves through conveyor tube 17 thus increasing the amount of power required to drive the auger around the conveyor loop.
Referring to Fig. 14, a test conveyor loop CL is shown having a test length of about 70 feet and a width of about 10 feet. The test loop has two auger drive motors, as shown at 20A and 20B, and a pair of intake feed cups 14 of the present invention installed in the conveyor loop. The turns of the conveyor are shown to be 90 degree corners and are indicated at C. The conveyor loop CL has a conveyor tube 16 and an auger 18, as previously described.
In a first test, the conveyor was driven only by drive motor 20A and was 1 S operated for about 15 minutes to with no feed in conveyor tube 17 and with no feed in the feed cups 14 so as to establish a steady state no load condition. The current supplied to drive motor 20A was measured to be 4.3 amps. Feed was then supplied to intake cups 14 so as to fill the conveyor and an excess supply of feed was maintained in each of the feed cups so as to continue to add feed to the conveyor. As the feed was added, the current required by drive motor 20A increased to 5.3 amps. As the filled conveyor continued to circulate for about 15 minutes, the current required by the drive motor increased to 7.1 amps at which point the conveyor would jam and the drive motor would be unable to continue to drive the auger in the conveyor tube. Under such high load conditions, even if the auger did not jam in the conveyor tube, if the drive motor would be shut off, the auger could not be re-started. In accordance with this invention, a re-leveling box 401 was placed in conveyor tube 17 upstream from drive motor so as to breakup the slug of feed in the conveyor and to prevent jamming. More specifically, re-leveling box 401 comprises either a dual diameter metering tube 300 or a gear 58 or 58" agitator and an accumulator supply hopper 403 with the metering tube or - 30 the gear agitator positioned so as to positively break up the slug of feed in the conveyor, to strip excess feed from the auger as the later passes through the re-leveling box, and to resupply the stripped feed to feed voids in the auger as they present themselves while moving through the re-leveling box. More particularly, if metering tube 300 is used, as the slug of compacted feed moves therethrough, excess feed is stripped from the auger by the stripping section 304 and the stripped feed is directed into the hopper 403 via discharge passage 308 to await the passage of a void in the auger. The feed in the WO 9.iI15453 PCTlUS93112226 hopper 403 with then flow into the void via passage 310 In this manner, the compacted slug of feed is broken up each time it passes through the re-leveling box and the trailing void is refilled. In tests with the test loop CL as above described, it has been found that with the conveyor filled with feed and with the intake cups constantly supplying additional feed to the conveyor, the conveyor would reach a steady state conditions in which the drive motor 20A would draw only about 5.3 amps and would maintain this even when the auger was continued to be driven for up to four hours with no increase in current to drive motor 20A.
If a bent gear _'i8" is. used in place of the dual diameter tube 300 in re-leveling box 401, it will be understood that the gear is mounted in the re-leveling box such that the gear is free to rotate with gear teeth in mesh with the auger as it passes therethrough. Thus, teeth 66 tend to dislodge compacted feed from between the flights 62 of the auger and to form a void in which fresh feed or dislodged feed may flow so as to prevent the buildup of a slug of feed which will result in jamming of the conveyor.
What has been described is an improved feed intake cup for use in a poultry feeder system by which feed is delivered from a hopper to a feed conveyor by which the feed is conveyed to a plurality of feeding sites. The conveyor system uses an auger for moving the feed and improved intake cup prevents the auger being jammed.
The intake cup, as described above, simply and easily prevents compaction of feed which would otherwise cause the jamming. It does this by jolting the auger as it moves through the cup, or by turning a pair of paddles to agitate, by vibration of the auger or stirring of the feed, the feed delivered to the auger. An important feature of the cup is the dual diameter tube in which the feed drive auger is positioned. By installing the tube so the auger is driven from the larger into the smaller diameter portion of the tube, excess feed can be removed from the conveyor rather than being constantly recirculated.
This also helps prevent compaction of the feed and potential jamming.
Additionally, the dual diameter regulating tube has no moving parts and thus is simple to construct and to operate.
As various changes could be made in the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Claims (6)
- CLAIMS:
Feed intake apparatus for a poultry or livestock feeding system, said apparatus comprising at least one housing having a feed inlet which receives feed from a feed supply and a feed outlet, a feed conveyor extending from said housing in an endless loop and returning to said housing, a plurality of feeders spaced along said endless loop, said feed conveyor comprising a conveyor tube and a conveyor element disposed within said tube, said conveyor element having a multiplicity of conveying elements spaced therealong, said conveyor element being axially driven within said conveyor tube around said endless loop for picking up feed from said housing and for conveying it through said conveyor tube to each of said feeders along said conveyor path and for returning any excess feed to said housing, and a regulating tube within said feed outlet receiving an auger, said regulating tube including a regulating section having a diameter only somewhat greater than the diameter of said auger thereby to regulate the amount of feed corned by said auger and to insure that a partial void is provided in said conveyor tube downstream from said feed intake apparatus thereby positively preventing over compaction of feed in said conveyor tube. - 2. Feed intake apparatus as set forth in claim 1 wherein said regulating tube further comprises a striping section upstream from said regulating section having a diameter only somewhat larger than the diameter of said auger for stripping excess feed corned by said auger.
- 3. Feed intake apparatus as set forth in claim 2 wherein said regulating tube has a discharge outlet upstream from said feed striping section for the discharge of said excess feed striped from said auger by said striping section.
- 4. Feed intake apparatus as set forth in claim 2 or 3 wherein said tube has a feed inlet opening intermediate said striping section and said regulating section for directing feed into said auger upstream of said regulating section thereby to insure the supply of fresh feed to said conveyor.
- 5. Feed intake apparatus as set forth in any one of claims 1 to 4 wherein said conveyor element is an auger housed within said conveyor tube, said feed auger having a multiplicity of substantially equally spaced flights with at least some of said auger flights within said feed intake apparatus being open from above, said apparatus further comprising an agitator member engageable with said auger flights as the latter move through said housing so as to effect intermittent movement of said agitator member relative to said auger.
- 6. Feed intake apparatus as set forth in claim 5 wherein said agitator member has an elongate member extending therefrom into said housing for agitating feed within said housing so as to insure that said feed flows to said regulating tube for being picked up by said auger and conveyed by said feed conveyor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/005,905 US5335619A (en) | 1993-01-15 | 1993-01-15 | Feed intake cup |
| US005,905 | 1993-01-15 | ||
| PCT/US1993/012226 WO1994015453A1 (en) | 1993-01-15 | 1993-12-14 | Feed conveying apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2150221A1 CA2150221A1 (en) | 1994-07-21 |
| CA2150221C true CA2150221C (en) | 2005-11-29 |
Family
ID=35520556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002150221A Expired - Fee Related CA2150221C (en) | 1993-01-15 | 1993-12-14 | Feed conveying apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2150221C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108925443A (en) * | 2018-07-04 | 2018-12-04 | 苏州华吉威自动化设备有限公司 | A kind of automatic high-efficiency charging device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108782300B (en) * | 2018-07-27 | 2023-10-27 | 南宁市牧泰智能科技开发有限公司 | Material feeding unit that poultry was fed |
| CN110622885B (en) * | 2019-10-17 | 2023-10-13 | 青岛田瑞科技集团有限公司 | Material homogenizing device |
| CN112970609B (en) * | 2021-01-29 | 2023-04-14 | 侯德刚 | Movable livestock forage stirring and feeding vehicle |
-
1993
- 1993-12-14 CA CA002150221A patent/CA2150221C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108925443A (en) * | 2018-07-04 | 2018-12-04 | 苏州华吉威自动化设备有限公司 | A kind of automatic high-efficiency charging device |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2150221A1 (en) | 1994-07-21 |
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