GB2121377A - Bridge scraper for unpiling material - Google Patents
Bridge scraper for unpiling material Download PDFInfo
- Publication number
- GB2121377A GB2121377A GB08312509A GB8312509A GB2121377A GB 2121377 A GB2121377 A GB 2121377A GB 08312509 A GB08312509 A GB 08312509A GB 8312509 A GB8312509 A GB 8312509A GB 2121377 A GB2121377 A GB 2121377A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bridge
- scraper
- vertical
- lifted
- frame
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/02—Loading or unloading machines comprising essentially a conveyor for moving the loads associated with a device for picking-up the loads
- B65G65/08—Loading or unloading machines comprising essentially a conveyor for moving the loads associated with a device for picking-up the loads with reciprocating pick-up conveyors
- B65G65/10—Raking or scraping devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ship Loading And Unloading (AREA)
- Sampling And Sample Adjustment (AREA)
- Combined Means For Separation Of Solids (AREA)
- Pusher Or Impeller Conveyors (AREA)
- Auxiliary Methods And Devices For Loading And Unloading (AREA)
Abstract
Apparatus for taking bulk material from dumps or the like consists of a chainless bridge scraper comprising a bridge 1 which spans the width of the dump and is movable along the dump. A movable beam 2 is disposed below the bridge and is parallel to the longitudinal direction of the bridge and is provided on its bottom surface with scraper blades 7 at spaced predetermined distances apart. The beam 2 is connected to the bridge 1 by rigid constraining means, which are adapted to be lifted and lowered and to be laterally actuated. An actuating mechanism 5,8 is provided to actuate and constrain the beam in a vertical direction and by a predetermined distance in and opposite to the direction in which the material is to be conveyed. <IMAGE>
Description
SPECIFICATION
Apparatus for taking bulk material from dumps or the like
This invention relates to apparatus for taking bulk material from dumps or the like, which apparatus consists of a bridge scraper comprising a bridge, which spans the width of the dump and is movable along the dump, and scraper blades for taking up the material.
The prior art is represented by apparatus disclosed in German Patent Specification
10 32 1 70. In that apparatus, the scraper blades are attached to a vertically revolving chain. As the chain is deflected from the vertical plane into a horizontal plane, difficulties are encountered with sticky or caking bulk material, which may adhere to the blades so that it is difficult to empty the blades.
Another known apparatus is disclosed in
German Patent Specification 26 1 6 807 and comprises a scraper chain revolving in a horizontal plane. That chain is guided by two carrying rails, which extend parallel to each other in a horizontal plane and above the same, respectively. A vertical wall is provided which is disposed between the two courses of the scraper chain and extends along the length thereof and serves to guide the material being handled.
In both designs and other known bridge scrapers, it is necessary to provide scraper chains, chain-guiding means, chain sprockets, drive shafts bearings, gearing and other parts which are subjected to wear. The apparatus constitute complicated and expensive structures and are relatively complicated also in operation.
It is an object of the invention to avoid the disadvantages of the known scraper conveyors regarding wear and mode of operation and to provide a bridge scraper by which the bulk material stored at the base of the dump can be removed along the dump in both directions without need for a scraper chain, as is particularly required in homogenizing dumps in the Portland cement industry, in coal-dressing plants and oredressing plants.
This object is accomplished in accordance with the invention by a design which is free of scraper chains and comprises a movable beam, which is disposed below the bridge and extends parallel to the longitudinal direction of the bridge and which is provided at its bottom surface with scraper blades spaced predetermined distances apart, which beam is connected to or suspended from the bridge by rigid constraining means, which are adapted to be lifted and lowered and to be actuated in a lateral direction and an actuating mechanism is provided for actuating and constraining the beam in a vertical direction and by a predetermined distance in and opposite to the direction in which the bulk material is to be conveyed.
In a preferred embodiment of the invention it has proved desirable to provide a swingable horizontal beam which is disposed below the bridge and is connected to the bridge by means of two substantially vertically extending levers,
which are disposed on opposite sides of and
embrace the bridge and are pivoted to the beam
and are pivoted to the bridge by an upper pivot for
a vertical pivoted movement, said pivot is connected by a link to a stationary point, and the
levers serve to impart vertical and forward and
rearward movements to the beam and to the scraper blades adjacent to the bulk material.
According to another feature of the invention, the horizontal beam which is movably arranged below the bridge is constrained by means of a substantially vertically extending frame, which
laterally embraces the bridge, also by means of a horizontally extending, closed track cage provided at the lower end of said frame, and by means of rollers which are movable in the inner frame on the top of the beam, which is adapted to be lifted and lowered and is linked to a fixed point by a link.
An upper actuating cylinder for vertical displacements is preferably disposed above the lever and/or the link and a lower actuating cylinder for horizontal displacements is preferably provided laterally of the lever and is pivoted to the underside of the bridge.
In accordance with a further feature of the invention, an upper actuating cylinder for vertical displacements is disposed above the frame and/or the link and a lower actuating cylinder which is rigidly connected to the beam in the direction of conveyance is provided laterally of the rack cage.
It has proved desirable to provide an arrangement in which the horizontal beam disposed below the bridge is constrained by means of a horizontally and vertically extending frame, which is substantially rigidly connected to the bridge, and by means of a track cage slot which extends in the vertical plane and is closed horizontally and in elliptical shape, and by means of rollers which are movable in the inner frame on the top of the beam.
In accordance with another preferred feature, two juxtaposed beams are disposed below the bridge and extend parallel to the bridge in its longitudinal direction and are movable, i.e., are adapted to be lifted and lowered and to be moved forwardly and rearwardly by a predetermined distance in the direction of conveyance and are adapted to be operated in tandem and provided on their bottom surfaces with scraper blades having a predetermined spacing, and said beams are connected to the bridge by rigid constraining means, which are adapted to be lifted and lowered and to be actuated in a lateral direction.
To avoid a return movement of the beam in the elliptical track, the same may contain springloaded elements preventing a return movement so that all rollers can be operated only in one direction.
The invention will now be explained more in detail with reference to illustrative embodiments shown on the drawings, in which
Figure 1 is an overall front elevation showing the apparatus,
Figure 2 is a corresponding detailed side elevation showing the levers and the functional parts associated therewith.
Figure 3 is a sectional view taken on line A-A in Figure 2,
Figure 4 is a side elevation showing a detail variant comprising a liftable frame and track cage and associated functional parts,
Figure 5 is a sectional view taken on plane B-B in Figure 4,
Figure 6 is a side elevational showing a variant with an elliptical track,
Figure 7 is a side elevation showing an embodiment comprising two beams and
Figure 8 is a sectional view taken on plane C-C in Figure 7.
The apparatus comprises a bridge 1, which spans the width of the dump and is movable along the dump and is rail-bound in the working region, and a movable beam 2, which is disposed below the bridge and extends parallel thereto in its longitudinal direction and on its bottom surface is provided with fixed scraper blades 7, which have a predetermined spacing. The beam 2 is connected to or suspended from the bridge 1 by constraining means 3, 13, which are adapted to be lifted and lowered and to be laterally actuated. Means for actuating the constraining means and the beam 2 in a vertical direction and by a predetermined distance in the direction of conveyance and opposite thereto comprise a link 5, which extends substantially above the bridge 1 and is pivoted to a fixed point 6, 1 5 of the bridge, and a lower actuating mechanism 8, 1 6.
The means for constraining the beam 2 relative to the bridge 1 preferably comprise pairs of substantially vertically extending levers 3. The levers of each pair are disposed on opposite sides of and embrace the bridge 1 for a vertical pivotal movement by an upper pivot 4, which is connected by a link 5 to a fixed point 6.
In dependence on the length of the bridge 1 and the requirements, two or more pairs of levers 3 are connected to the bridge 1. Two or more upper actuating cylinders 9 are pivoted to the bridge and serve to lift and lower the beam 2 and the levers 3 and act on the link 5 to initiate the lifting and lowering movement. An actuating cylinder 8 for horizontal displacements is pivoted to the underside of the bridge laterally of the lever 3 and serves to actuate the levers 3 and the beam 2.
The levers 3 are designed to embrace the bridge 1 and are laterally supported by the bridge 1 during a conveyance of material so that the resistance presented by the material will be taken up by the scraper blades 7 and the frictional resistance between the bridge and the levers will be relatively small. For this purpose, slide bars 1 0 of plastic material may be provided between the bridge 1 and the lever 3.
In another embodiment, shown in Figures 4, 5, the beam 2 is connected to the bridge 1 by a frame 13, which is adapted to be lifted and lowered. A horizontally extending track cage 12, which is closed in itself, is provided at the lower end of the frame 1 3 and serves to receive rollers
11, which are guided inside the track cage and on the upper surface of the beam 2. The top part of the frame 13 is connected to a vertical link 14 and is supported at a fixed point 1 5 above the bridge
1.
A lower actuating cylinder 1 6 is supported on the side of the track cage 1 2 in the direction of conveyance and is fixed to the beam 2. An upper actuating cylinder 9 for vertical displacements of the frame 13 and of the beam 2 is mounted above the frame 13 and the link 5.
The mode of operation is as follows:
In the initial position the lower actuating cylinder 8, 1 6 is extended, the piston of the upper actuating cylinder 9 is retracted. In the operating position the upper actuating cylinder 9 lowers the frame 13 and the levers 3 so that the scraper blades 7 enter the bulk material. The beam 2 with the scraper blades 7 is then moved in the direction of conveyance and the material to be conveyed is advanced in steps to the succeeding conveyor.
When the stroke has been completed, the system is lifted by means of the upper actuating cylinder 9 and is moved to its initial position by means of the lower actuating cylinders 8, 1 6.
An intermittent operation, a semicontinuous operation and a continuous operation can be achieved by a suitable control of the velocity of the actuating cylinders.
In another embodiment, shown in Figure 6, the beam is connected to the bridge by means of a rigid frame 1 7 in such a manner that the track cage 1 8 defining a closed elliptical track ensures that the beam 2 will move on a constant level.
Throughout the movement of the beam 2, the
latter is constrained by the elliptical track in the track cage 1 8 and by rollers 19 provided at the top of the beam. This embodiment affords the
advantage that the structure is simplified in a
desirable manner and the need for the
mechanisms for lifting and lowering the beam is
eliminated. In the initial position the beam 2 is in
its upper position. In the operating position the
beam 2 is lowered by means of the rollers 19
moving in the elliptical track cage 1 8 so that the
scraper blades 7 enter the bulk material. During a
subsequent step the beam with the scraper blades
is moved for a predetermined distance in the
direction of conveyance in the material being
conveyed. When the end position in the elliptical
track in the track cage has been reached, the
beam 2 is raised from the material to be conveyed
and is returned to its initial position.
In another embodiment, shown in Figures 7 and
8, two beams 20 are provided below the bridge 1
and are adapted to be operated in tandem to
ensure a substantially continuous conveyance at
uniform forward and rearward velocities.
In the initial position, both beams are held in a
position midway between their upper and lower positions. During operation one beam is lowered
so that its scraper blades enter the material to be
conveyed whereas the other beam is raised to its uppermost position. Thereafter the first beam together with the material being conveyed is moved in the direction of conveyance and the second beam, without material to be conveyed, is moved rearwardly to its initial position. Thereafter the second beam serves to convey material and the first beam is returned.
The surprising technical result which is produced resides in that the apparatus is simplified by the elimination of chains and the like so that the structure is lighter in weight and more economical. Because the blades are directly
accessible when the apparatus is at a standstill, the time required for repairs and maintenance will
be reduced. The scraper blades are directly raised
out of the material to be conveyed so that the
availability of the entire bridge scraper apparatus
is increased.
When it is desired to move the apparatus from one dump to another, the beam with the scraper blades is lifted and the apparatus is moved by the running gear to an operating position at another elongated dump without contacting the dump area during such travel.
When bridge scrapers having a scraper chain travel from one dump to another, the material which has remained on the bottom of the dump is inevitably carried along so that the desired chemical composition of the homogenized mixture may be altered in an undesired manner.
No material to be conveyed is carried along during the travel of the chainless bridge scraper which has been described so that the homogenization will not be adversely affected by such transfer.
The bulk material present at the base of the dump may be removed along the dump in either direction.
Claims (8)
1. Apparatus for taking bulk material from dumps or the like, which apparatus consists of a bridge scraper comprising a bridge, which spans the width of the dump and is movable along the dump, and scraper blades for taking up the material, characterized in that the apparatus is chainless and comprises a moveable beam, which is disposed below the bridge and extends parallel to the longitudinal direction of the bridge and which is provided at its bottom surface with scraper blades spaced predetermined distances
apart, which beam is connected to or suspended from the bridge by rigid constraining means, which are adapted to be lifted and lowered and to
be actuated in a lateral direction, and an actuating
mechanism is provided for actuating and
constraining the beam in a vertical direction and
by a predetermined distance in and opposite to the
direction in which the bulk material is to be
conveyed.
2. A bridge scraper according to claim 1,
characterized in that the swingable horizontal
beam which is disposed below the bridge is connected to the bridge by means of two substantially vertically extending levers, which are disposed on opposite sides of and embrace the bridge and are pivoted to the beam and are pivoted to the bridge by an upper pivot for a vertical pivoted movement, said pivot is connected by a link to a stationary point, and the levers serve to impart vertical and forward and rearward movements to the beam and to the scraper blades adjacent to the bulk material.
3. A bridge scraper according to claim 1, characterized in that the horizontal beam which is movably arranged below the bridge is constrained by means of a substantially vertically extending frame, which laterally embraces the bridge, also by means of a horizontally extending, closed track cage provided at the lower end of said frame, and by means of rollers which are movable in the inner frame on the top of the beam, which is adapted to be lifted and lowered and is linked to a fixed point buy a link.
4. A bridge scraper according to claim 1 or 2, characterized in that an upper actuating cylinder for vertical displacements is preferably disposed above the lever and/or the link and a lower actuating cylinder for horizontal displacements is preferably provided laterally of the lever and is pivoted to the underside of the bridge.
5. A bridge scraper according to claim 1 or 3, characterized in that an upper actuating cylinder for vertical displacements is disposed above the frame and/or the link and a lower actuating cylinder which is rigidly connected to the beam in the direction of conveyance is provided laterally of the track cage.
6. A bridge scraper according to claim 1, characterized in that the horizontal beam disposed below the bridge is constrained by means of a horizontally and vertically extending frame, which is substantially rigidly connected to the bridge, and by means of a track cage which extends in the vertical plane and is closed horizontally and in elliptical shape, and by means of rollers which are movable in the inner frame on the top of the beam
7. A bridge scraper according to claim 1, characterized in that two juxtaposed beams are disposed below the bridge and extend parallel to the bridge in its longitudinal direction and are movable, i.e., are adapted to be lifted and lowered and to be moved forwardly and rearwardly by a predetermined distance in the direction of conveyance and are adpated to be operated in tandem and provided on their bottom surfaces with scraper blades having a predetermined spacing, and said beams are connected to the bridge by rigid constraining means, which are adapted to be lifted and lowered and to be actuated in a lateral direction.
8. A bridge scraper according to claim 1 or 6, characterized in that the track cage is provided with spring-loaded elements preventing a return movement of the beam in the elliptical track and all rollers can be operated only in one direction.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3219177A DE3219177C2 (en) | 1982-05-21 | 1982-05-21 | Device for removing bulk material from heaps or the like. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8312509D0 GB8312509D0 (en) | 1983-06-08 |
| GB2121377A true GB2121377A (en) | 1983-12-21 |
| GB2121377B GB2121377B (en) | 1985-11-20 |
Family
ID=6164210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08312509A Expired GB2121377B (en) | 1982-05-21 | 1983-05-06 | Bridge scraper for unpiling material |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5936030A (en) |
| DE (1) | DE3219177C2 (en) |
| DK (1) | DK225783A (en) |
| FI (1) | FI831259L (en) |
| FR (1) | FR2527185A1 (en) |
| GB (1) | GB2121377B (en) |
| IT (1) | IT1161167B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3726977C3 (en) * | 1987-08-13 | 1995-09-07 | Pwh Anlagen & Systeme Gmbh | Storage device for bulk material dumps |
| JP2510272B2 (en) * | 1989-01-19 | 1996-06-26 | 積水化学工業株式会社 | Method for manufacturing water-permeable artificial lawn |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB608791A (en) * | 1946-02-28 | 1948-09-21 | Boby Ltd Robert | Improvements in or relating to kilns |
| GB707594A (en) * | 1951-01-04 | 1954-04-21 | Otto Welger | Improvements in and relating to collecting and baling presses, for straw, hay or thelike |
| GB741233A (en) * | 1951-01-04 | 1955-11-30 | Otto Welger | Improvements in and relating to collecting and baling presses for straw, hay or the like |
| GB1598661A (en) * | 1976-10-21 | 1981-09-23 | Worsley & Co Ltd G | Apparatus for moving materials |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1354676A (en) * | 1917-12-15 | 1920-10-05 | Benjamin A Mitchell | Drag-classifier |
| DE1206192B (en) * | 1964-06-01 | 1965-12-02 | Bernhard Strautmann & Soehne O | Device for picking up and conveying bulk agricultural goods |
| DE1275457B (en) * | 1965-04-09 | 1968-08-14 | Buettner Werke Ag | Step-by-step conveyor for dust or bulk material, particularly suitable as a discharge device for electric dust extractors |
| DE1927031A1 (en) * | 1969-05-28 | 1970-12-03 | Schade Maschf Gustav | Device for removing debris heaps and the like. |
| DE2616807C3 (en) * | 1976-04-15 | 1978-09-21 | Pohlig-Heckel-Bleichert Vereinigte Maschinenfabriken Ag, 5000 Koeln | Device for storing a bulk material dump |
| FR2392904A1 (en) * | 1977-06-01 | 1978-12-29 | Fives Cail Babcock | Bulk material loading-unloading machine - has chain scraper and harrow on arm travelling over stocking area |
| JPS5649822A (en) * | 1979-09-28 | 1981-05-06 | Toshiba Electric Equip Corp | Electric heater device |
| JPS5652208U (en) * | 1979-09-29 | 1981-05-08 | ||
| DE3031861A1 (en) * | 1980-08-23 | 1982-04-01 | Fried. Krupp Gmbh, 4300 Essen | Pick up installation for band conveyors - retrieves goods falling from conveyor band onto support frame using movable scraper beams |
-
1982
- 1982-05-21 DE DE3219177A patent/DE3219177C2/en not_active Expired
-
1983
- 1983-04-14 FI FI831259A patent/FI831259L/en not_active Application Discontinuation
- 1983-04-22 IT IT20756/83A patent/IT1161167B/en active
- 1983-05-05 FR FR8307492A patent/FR2527185A1/en not_active Withdrawn
- 1983-05-06 GB GB08312509A patent/GB2121377B/en not_active Expired
- 1983-05-20 JP JP58087814A patent/JPS5936030A/en active Pending
- 1983-05-20 DK DK225783A patent/DK225783A/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB608791A (en) * | 1946-02-28 | 1948-09-21 | Boby Ltd Robert | Improvements in or relating to kilns |
| GB707594A (en) * | 1951-01-04 | 1954-04-21 | Otto Welger | Improvements in and relating to collecting and baling presses, for straw, hay or thelike |
| GB741233A (en) * | 1951-01-04 | 1955-11-30 | Otto Welger | Improvements in and relating to collecting and baling presses for straw, hay or the like |
| GB1598661A (en) * | 1976-10-21 | 1981-09-23 | Worsley & Co Ltd G | Apparatus for moving materials |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3219177A1 (en) | 1983-11-24 |
| IT8320756A1 (en) | 1984-10-22 |
| JPS5936030A (en) | 1984-02-28 |
| FI831259A0 (en) | 1983-04-14 |
| IT1161167B (en) | 1987-03-11 |
| IT8320756A0 (en) | 1983-04-22 |
| FR2527185A1 (en) | 1983-11-25 |
| DK225783A (en) | 1983-11-22 |
| GB8312509D0 (en) | 1983-06-08 |
| DE3219177C2 (en) | 1987-08-20 |
| GB2121377B (en) | 1985-11-20 |
| FI831259L (en) | 1983-11-22 |
| DK225783D0 (en) | 1983-05-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |