CA1135648A - Bucket conveyor - Google Patents
Bucket conveyorInfo
- Publication number
- CA1135648A CA1135648A CA000327927A CA327927A CA1135648A CA 1135648 A CA1135648 A CA 1135648A CA 000327927 A CA000327927 A CA 000327927A CA 327927 A CA327927 A CA 327927A CA 1135648 A CA1135648 A CA 1135648A
- Authority
- CA
- Canada
- Prior art keywords
- conveyor
- drive
- cables
- cable
- buckets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
ABSTRACT OF THE DISCLOSURE
Instead of usual chains or belts with protrusions interlocking drive sprockets or gears of positive drive means such as a bucket conveyor, the invention utilizes cables or ropes, one on each side of the buckets. The drive is effected by drive pulleys, each pulley guiding and driving only a single cable and having a smooth peripheral groove engaging the surface of the respective cable so that the drive is solely frictional, without any positive interlock between the drive pulley and the cables, while transverse guidance of each cable is also secured, thus rendering the conveyor lighter, less expensive and capable of operating at higher speed to increase operational capacity of the conveyor. The securement of each bucket to the respective cable is effected by a loop formed by deflecting the cable away from the direction of its pull.
Instead of usual chains or belts with protrusions interlocking drive sprockets or gears of positive drive means such as a bucket conveyor, the invention utilizes cables or ropes, one on each side of the buckets. The drive is effected by drive pulleys, each pulley guiding and driving only a single cable and having a smooth peripheral groove engaging the surface of the respective cable so that the drive is solely frictional, without any positive interlock between the drive pulley and the cables, while transverse guidance of each cable is also secured, thus rendering the conveyor lighter, less expensive and capable of operating at higher speed to increase operational capacity of the conveyor. The securement of each bucket to the respective cable is effected by a loop formed by deflecting the cable away from the direction of its pull.
Description
1135f~i48 The present invention relates to a bucket conveyor provided with endless draw means for carrying buckets or the like.
In general, bucket conveyors mainly serve in a vertical or steep conveying of loose material, of the type, wherein a plurality of buckets, troughs or pockets is arranged to provide a uniformly pulsating stream of the conveyed material. The material receiving buckets, troughs or pockets are secured to endless draw or carrier means and define with same a predetermined conveying path or loop. In the known structures of the above type, such draw means are formed either by chains of different structural configuration or by draw belts. The tension bucket conveyors utilizing cables are provided with different engagement means directed to secure a positive drive at the drive sprocket or pulley, the pulley having complementary protrusions or depressions for engagement with the engagement means of the belt or cable, to thus provide the positive drive, much like the typical chain-and-sprocket drive. The positive drive has been considered to be the only way of effectively operating a bucket conveyor as witnessed of prior art of which German patent 528,451 and German patent 173,388 show a belt-type bucket conveyor and the way of securing of buckets of same to the belt, while German patent 625,808 and German Offenlegungschrift (patent application published for inspection) 15 5Ç 173 disclose chains as the draw or carrier means for advancing the buckets of a conveyor.
Reference may also be had to Canadian patent 64611 (Edison), Canadian patent 196,981 (Hudson~, U.S. Patent 1,942,590 (Binger), U.S. Patent 3,338,379 (Patterson), sritish patents 301,320 (Isnard) and 252,548 (Neubauer) and many other issued patents showing that the only drive the artisans considered feasible for bucket conveyors is a positive drive ~35648 as referred to above. It is also known to provide bucket conveyors with a plurality of cables at each side of the bucketst each plurality of cables running over a flat surface of a drive drum. The disadvantages of the last mentioned arrangement include the need for an additional guide means for lateral guiding of the cable system at each side of the buckets (East German Patent 58903 - Grunert et al or U.S. Patent 671,315 - Edison) not to mention great width of the drums and difficulties in correcting transverse misalignment of the entire system.
The known structures of bucket conveyors generally are not suitable for high capacity performance applications of bucket conveyors, frequently required in the present technology. The conveyor capacity range figures of conveyors presently being planned start at 500 t~h (tons per hour) and often reach into the region of 1000 t/h. In the future, they are expected to even reach the figures of about 1600 t/h.
In such applications, the belts are no longer suitable as carriers for the buckets. The belt strength required at an increased volume of conveying results in considerable increase in the weight of the material. The drum diameter has also to be increased in order to be capable to handle the increased load caused by the weight of the material. The securement of the buckets turns out to be difficult.
On the other hand, the use of chain-type bucket carriers or draw means appears to be entirely out of question as the increase in the operational capacity of bucket conveyors is generally attained onlv by an increase in the speed of the conveyor. Round link chains allow only speeds of up to a maximum of 0.8 m/s (meters per second), sprocket chains up to 2.5 m/s. At these speed ranges, a strong wear ~.
of the chains takes place. At higher speeds, the application of ch~ins is no longer commercially feasible.
It is an ob~ect of the present invention to overcome the above deficiencies of prior art bucket conveyors.
According to the present invention, the draw or carrier means comprises two cables or ropes driven by frictional engagement with drive pulleys, the conveyor troughs or buckets being secured to such cables. By providing such carrier means, the conveyor troughs can be disposed between the carrier means and can be pivotable, The securement of the conveyor troughs is effected by loops or deflections of the draw cables away fr~m their direction of pull. The drive pulleys are provided with peripheral grooves which can be lined with a drive pulley lining to increase frictional engage~ent between the pulley and the cable.
The said arrange~ent of a bucket conveyor in accordance with the present invention provides noticeable advantages over the presently known structures. Thus, the main advantage resides in a considerable weight reduction which is achieved b~ the application of cables or ropes and drive pulleys in a simple structural arrangement which also applies for the supporting ~tructure. The reduced weight results in the possibility of simul-taneously achievlng an increas~ in the conveying height. In order to achieve an increased speed of conveying, the required grip angle and an increase in friction between the cable and the drive pulley is obtained by lining the grooves in the pulleys, as in the arrangement of the Koepe pulley. In doing so, it is of advantage when the reversing guide loops are movable for adjustment of tension of the cables. The operational principle . ~ .
,~-~1356~8 proposed in accordance with the invention also enables so-called inside dumping of the buckets or troughs, which was not possible in the art of belt carrier bucket conveyors, due to the belt and the drive or guide drums obstructing such discharge. Gn reachin~
a speed limit of the conveyor at which the desired centri~ugal force discharge is still possible, a further increase in the conveying speed can only be achleved if the shape of the buckets or troughs is changed. Su¢h buckets can be disposed between the draw or carrier cable means. In pivotal securement of the buckets between the carrier means, the proposed principle of the present invention can be applied in providing so-called pivoted bucket conveying. In such arrangement it is also possible to provide virtually any desired course of the path of the buc~et conveyor, for instance, a part of the conveyor loop may be disposed in horizontal clrection. The securement of the troughs to the cable or rope enables a free passage over the area of the drive pulleys.
In summary, it can be stated that the present invention improves operational charscteristics of the known bucket conveyors .
-bo a substantial d~ . The advanta~es include higher conveying paths, made possible by reducing the overall weight of the elements of the device. Lower production costs and higher speed and thus an increased capacity are also achieved.
The inventlon will n~w be described by way of preferred embodiments, with reference to the accompanying simplifled drawings, whereins Figure 1 is a slde elevation of a bucket conveyor according to . . .
the present invention;
Flgure 2 is a section II-II of Fig.1;
Figure 3 is section III-III of Fig.1~
Figure 4 is an arrangement according to the present invention, as applied in the art of pivotal Ducket conveyors; and -Y- ..
~ _ 4 -, ......
Figure 5 is section V-V of Fig. 4.
Draw cables 1 and 2 are driven by frictia~ drive pulleys 3 and 4 and pass over a pair of guide p~ eys 5 and 6, to reverse the direction of their travel. The conveyor buckets 7 are secured to the carrier cables 1 and 2 by loops 8 deflectlng the respectlve cable awa~ from the direction of its pull, about the respective bucket a21s or journal 9 and the associated guide bolts 10. This way of securement provides the advantage of the carrier cables 1 and 2 being capable of passing free of obstructions over the drlve and guide pulleys 3, 4, 5 and 6. Reference n~meral 11 deslgnates straight guide rails, while numeral 12 refers to outer ourved guide rails, on which guide rolls 13, p~votally secured to ~ournals 9 of the conveyor buckets 7 are arranged ... . .. ..
to ride. The drive pulleys 3, 4 are provided each with a smooth peripheral groove 14 and are free of any positive drive pro-jections or deflections. They can be lined with a drive pulleylining 15, to increase frictional engagement between the ropes 1 and 2 and the respective grooves.
Figure 4 shows a pivoted bucket conveyor. As will be apparent on review of the figure, the course of conveying can be of virtually any desired shape. Thus, the conveying loop may also include a horizontal porti-on, as indlcated at the bottom of Fig.4. The arrangement, securement and guiding of buckets is effected as described above with reference to Figures 1 through 3, wlth the only dlfference, namely that the conveyor buckets 7 are pivotally secured to their journals or a~es 9.
The guiding is effected by guide pulleys well known in the art and tharefore not shown in the drawings, such guide pulleys being dlsposed at required turns of the conveying path. The conveyor buckets 7 being disposed between drive and guide pulleys 3, 4, 5 and 6, they can be discharged by centrifugal force or by lnside dumping.
.
In general, bucket conveyors mainly serve in a vertical or steep conveying of loose material, of the type, wherein a plurality of buckets, troughs or pockets is arranged to provide a uniformly pulsating stream of the conveyed material. The material receiving buckets, troughs or pockets are secured to endless draw or carrier means and define with same a predetermined conveying path or loop. In the known structures of the above type, such draw means are formed either by chains of different structural configuration or by draw belts. The tension bucket conveyors utilizing cables are provided with different engagement means directed to secure a positive drive at the drive sprocket or pulley, the pulley having complementary protrusions or depressions for engagement with the engagement means of the belt or cable, to thus provide the positive drive, much like the typical chain-and-sprocket drive. The positive drive has been considered to be the only way of effectively operating a bucket conveyor as witnessed of prior art of which German patent 528,451 and German patent 173,388 show a belt-type bucket conveyor and the way of securing of buckets of same to the belt, while German patent 625,808 and German Offenlegungschrift (patent application published for inspection) 15 5Ç 173 disclose chains as the draw or carrier means for advancing the buckets of a conveyor.
Reference may also be had to Canadian patent 64611 (Edison), Canadian patent 196,981 (Hudson~, U.S. Patent 1,942,590 (Binger), U.S. Patent 3,338,379 (Patterson), sritish patents 301,320 (Isnard) and 252,548 (Neubauer) and many other issued patents showing that the only drive the artisans considered feasible for bucket conveyors is a positive drive ~35648 as referred to above. It is also known to provide bucket conveyors with a plurality of cables at each side of the bucketst each plurality of cables running over a flat surface of a drive drum. The disadvantages of the last mentioned arrangement include the need for an additional guide means for lateral guiding of the cable system at each side of the buckets (East German Patent 58903 - Grunert et al or U.S. Patent 671,315 - Edison) not to mention great width of the drums and difficulties in correcting transverse misalignment of the entire system.
The known structures of bucket conveyors generally are not suitable for high capacity performance applications of bucket conveyors, frequently required in the present technology. The conveyor capacity range figures of conveyors presently being planned start at 500 t~h (tons per hour) and often reach into the region of 1000 t/h. In the future, they are expected to even reach the figures of about 1600 t/h.
In such applications, the belts are no longer suitable as carriers for the buckets. The belt strength required at an increased volume of conveying results in considerable increase in the weight of the material. The drum diameter has also to be increased in order to be capable to handle the increased load caused by the weight of the material. The securement of the buckets turns out to be difficult.
On the other hand, the use of chain-type bucket carriers or draw means appears to be entirely out of question as the increase in the operational capacity of bucket conveyors is generally attained onlv by an increase in the speed of the conveyor. Round link chains allow only speeds of up to a maximum of 0.8 m/s (meters per second), sprocket chains up to 2.5 m/s. At these speed ranges, a strong wear ~.
of the chains takes place. At higher speeds, the application of ch~ins is no longer commercially feasible.
It is an ob~ect of the present invention to overcome the above deficiencies of prior art bucket conveyors.
According to the present invention, the draw or carrier means comprises two cables or ropes driven by frictional engagement with drive pulleys, the conveyor troughs or buckets being secured to such cables. By providing such carrier means, the conveyor troughs can be disposed between the carrier means and can be pivotable, The securement of the conveyor troughs is effected by loops or deflections of the draw cables away fr~m their direction of pull. The drive pulleys are provided with peripheral grooves which can be lined with a drive pulley lining to increase frictional engage~ent between the pulley and the cable.
The said arrange~ent of a bucket conveyor in accordance with the present invention provides noticeable advantages over the presently known structures. Thus, the main advantage resides in a considerable weight reduction which is achieved b~ the application of cables or ropes and drive pulleys in a simple structural arrangement which also applies for the supporting ~tructure. The reduced weight results in the possibility of simul-taneously achievlng an increas~ in the conveying height. In order to achieve an increased speed of conveying, the required grip angle and an increase in friction between the cable and the drive pulley is obtained by lining the grooves in the pulleys, as in the arrangement of the Koepe pulley. In doing so, it is of advantage when the reversing guide loops are movable for adjustment of tension of the cables. The operational principle . ~ .
,~-~1356~8 proposed in accordance with the invention also enables so-called inside dumping of the buckets or troughs, which was not possible in the art of belt carrier bucket conveyors, due to the belt and the drive or guide drums obstructing such discharge. Gn reachin~
a speed limit of the conveyor at which the desired centri~ugal force discharge is still possible, a further increase in the conveying speed can only be achleved if the shape of the buckets or troughs is changed. Su¢h buckets can be disposed between the draw or carrier cable means. In pivotal securement of the buckets between the carrier means, the proposed principle of the present invention can be applied in providing so-called pivoted bucket conveying. In such arrangement it is also possible to provide virtually any desired course of the path of the buc~et conveyor, for instance, a part of the conveyor loop may be disposed in horizontal clrection. The securement of the troughs to the cable or rope enables a free passage over the area of the drive pulleys.
In summary, it can be stated that the present invention improves operational charscteristics of the known bucket conveyors .
-bo a substantial d~ . The advanta~es include higher conveying paths, made possible by reducing the overall weight of the elements of the device. Lower production costs and higher speed and thus an increased capacity are also achieved.
The inventlon will n~w be described by way of preferred embodiments, with reference to the accompanying simplifled drawings, whereins Figure 1 is a slde elevation of a bucket conveyor according to . . .
the present invention;
Flgure 2 is a section II-II of Fig.1;
Figure 3 is section III-III of Fig.1~
Figure 4 is an arrangement according to the present invention, as applied in the art of pivotal Ducket conveyors; and -Y- ..
~ _ 4 -, ......
Figure 5 is section V-V of Fig. 4.
Draw cables 1 and 2 are driven by frictia~ drive pulleys 3 and 4 and pass over a pair of guide p~ eys 5 and 6, to reverse the direction of their travel. The conveyor buckets 7 are secured to the carrier cables 1 and 2 by loops 8 deflectlng the respectlve cable awa~ from the direction of its pull, about the respective bucket a21s or journal 9 and the associated guide bolts 10. This way of securement provides the advantage of the carrier cables 1 and 2 being capable of passing free of obstructions over the drlve and guide pulleys 3, 4, 5 and 6. Reference n~meral 11 deslgnates straight guide rails, while numeral 12 refers to outer ourved guide rails, on which guide rolls 13, p~votally secured to ~ournals 9 of the conveyor buckets 7 are arranged ... . .. ..
to ride. The drive pulleys 3, 4 are provided each with a smooth peripheral groove 14 and are free of any positive drive pro-jections or deflections. They can be lined with a drive pulleylining 15, to increase frictional engagement between the ropes 1 and 2 and the respective grooves.
Figure 4 shows a pivoted bucket conveyor. As will be apparent on review of the figure, the course of conveying can be of virtually any desired shape. Thus, the conveying loop may also include a horizontal porti-on, as indlcated at the bottom of Fig.4. The arrangement, securement and guiding of buckets is effected as described above with reference to Figures 1 through 3, wlth the only dlfference, namely that the conveyor buckets 7 are pivotally secured to their journals or a~es 9.
The guiding is effected by guide pulleys well known in the art and tharefore not shown in the drawings, such guide pulleys being dlsposed at required turns of the conveying path. The conveyor buckets 7 being disposed between drive and guide pulleys 3, 4, 5 and 6, they can be discharged by centrifugal force or by lnside dumping.
.
Claims (3)
1. A bucket conveyor for a high conveying capacity and great elevation heights, of the type provided with an endless, driven draw means, wherein (a) the draw means consists of two cables, each cable frictionally engaging a respective drive pulley, a plurality of conveyor buckets being secured to said cables;
(b) the conveyor buckets are each disposed between said cables and are pivotable relative to said cables;
(c) the conveyor buckets are each secured to the respective cables at loop portions of the cables, each loop portion being deflected away from the direction of drive pull acting on the respective cable.
(b) the conveyor buckets are each disposed between said cables and are pivotable relative to said cables;
(c) the conveyor buckets are each secured to the respective cables at loop portions of the cables, each loop portion being deflected away from the direction of drive pull acting on the respective cable.
2. A conveyor as claimed in claim 1, wherein the drive pulleys are each provided with a peripheral groove.
3. A conveyor as claimed in claim 2, wherein the peripheral groove of each drive pulley is lined with a lining for increasing frictional engagement with the respective cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000327927A CA1135648A (en) | 1979-05-18 | 1979-05-18 | Bucket conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000327927A CA1135648A (en) | 1979-05-18 | 1979-05-18 | Bucket conveyor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1135648A true CA1135648A (en) | 1982-11-16 |
Family
ID=4114237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000327927A Expired CA1135648A (en) | 1979-05-18 | 1979-05-18 | Bucket conveyor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1135648A (en) |
-
1979
- 1979-05-18 CA CA000327927A patent/CA1135648A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |