CA1078789A - Machine for salvaging waste concrete material - Google Patents
Machine for salvaging waste concrete materialInfo
- Publication number
- CA1078789A CA1078789A CA311,329A CA311329A CA1078789A CA 1078789 A CA1078789 A CA 1078789A CA 311329 A CA311329 A CA 311329A CA 1078789 A CA1078789 A CA 1078789A
- Authority
- CA
- Canada
- Prior art keywords
- classifying drum
- section
- drum
- water
- concrete material
- 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
Landscapes
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A machine for salvaging wet concrete material has an inclined frame with a classifying drum mounted for axial rotation thereon. The classify-ing drum has a first section adjacent its lower end incorporating an unbroken cylindrical wall, a second section adjacent thereto incorpora-ting a fine sand screen cylindrical wall, a third section adjacent said second section incorporating a coarse sand screen cylindrical wall and a fourth section adjacent thereto incorporating an unbroken cylindrical wall with an open end. A spiral conveyor in the classifying drum is attached to and extends continuously therethrough. A receiving hopper and a well are located on the frame at the lower end thereof for receiving the wet concrete material and water. A rotary elevator is attached to the first section of said classifying drum for rotation therewith and is partially disposed within said well and valve means controls communication between said hopper and said well. A discharge chute is positioned through a central opening in said rotary elevator and extends into the first section of the classifying drum and delivers wet concrete material and water from the well into said first section of said classifying drum.
A receiving trough is disposed under the screen cylindrical walls of the classifying drum for receiving water, cement and sand passing therethrough.
This invention is distinguishable from others by reason of the arrangement of the rotary elevator, receiving hopper and well with the valve means for controlling the flow of wet material and water therefrom into said drum.
A machine for salvaging wet concrete material has an inclined frame with a classifying drum mounted for axial rotation thereon. The classify-ing drum has a first section adjacent its lower end incorporating an unbroken cylindrical wall, a second section adjacent thereto incorpora-ting a fine sand screen cylindrical wall, a third section adjacent said second section incorporating a coarse sand screen cylindrical wall and a fourth section adjacent thereto incorporating an unbroken cylindrical wall with an open end. A spiral conveyor in the classifying drum is attached to and extends continuously therethrough. A receiving hopper and a well are located on the frame at the lower end thereof for receiving the wet concrete material and water. A rotary elevator is attached to the first section of said classifying drum for rotation therewith and is partially disposed within said well and valve means controls communication between said hopper and said well. A discharge chute is positioned through a central opening in said rotary elevator and extends into the first section of the classifying drum and delivers wet concrete material and water from the well into said first section of said classifying drum.
A receiving trough is disposed under the screen cylindrical walls of the classifying drum for receiving water, cement and sand passing therethrough.
This invention is distinguishable from others by reason of the arrangement of the rotary elevator, receiving hopper and well with the valve means for controlling the flow of wet material and water therefrom into said drum.
Description
Background of the Invention (1) Field of the Invention:
This invention relates to machines for salvaging waste concrete materia1 such as for example that contai`ned in a ready mix concrete truck and unused at a job site. ;
This invention relates to machines for salvaging waste concrete materia1 such as for example that contai`ned in a ready mix concrete truck and unused at a job site. ;
(2) Description of the Prior Art:
Priot machines for this purpose have been proposed and one such machine is seen in U.S. Patent 2,942,731 of June 28, 1960 to R.B.
Soldini. An aggregate separating machine is seen in U.S. Patent No.
2,983,378 of May 9, 1961 to L.G. HiIkemeier and a gravel sepatator, a foundry sand reclaiming device and an ore washing apparatus are seen in U.S. Patents 2,836,299 of May 27, 1958 to E. Johnson and 2,331,135 of October 5, 1943 to ~. Ovestrud and 2,599,402 of June 3, 1952 to R.B.
Lindsey, respectively. Each of these patented devices incorporate a classi-fying drum into which material can be delivered. Each of the machines attempts separation and classification of the materials introduced and one of them, that of U.S. patent 2,942,731, attempts a washing action with respect to the concrete present in the concrete mix introduced into the machine. None of the disclosures incoude a practical means of receiv-ing a batch of mixed unset concrete from a ready mix truck and then deliver-ing it at a predetermined rate and volume which can be controlled by the operator as necessary with respect to the condition of the concrete being handled.
None of the disclosures include a practical means of receiving a batch of mixed unset concrete from a ready mix truck and then delivering it at a predetermined rate and volume which can be controlled by the operator as necessary with respect to the condition of the concrete being 28 hauled. None of the machines of the patents disclose a settling tank for _3_ ,~
.' '. " ~ :
- 107~789 settling out and recovering the fines, such as fine sands and the like, :
which constitute a substantial portion of the mixed concrete and none of the machines teach a practical and efficient apparatus for handling, washing and separating all of the material ;n wet concrete as highly desirable in considering the environmental impact of the dumping of such wet concrete indiscriminately as frequently takes place at the present time.
Summary of the Invention A machine for salvaging waste concrete material incorporates a receiving hopper capable of receiving a sizable amount of wet concrete from a ready mix truck, apparatus for selectively feeding the wet concrete at controlled rates into an inclined classifying and separating drum wherein water is introduced for washing cement from sand and aggregate present in the concrete mix with the resultant coarse sand and aggregate being classified as by size and discharged and the water mixed cement and fine sands and the like discharged into a sump and settling tank from which the fine sands and the like may be recovered and from which the clarified water may be recirculated.
Description of the Drawings Figure 1 is a side elevation with broken lines indicating hidden parts showing a mchine for salvaging wet concrete material;
Figure 2 is an end elevation on line 2-2 of Figure l;
Figure 3 is an opposite end elevation on line 3-3 of Figure I;
and Figure 4 is an opposite side elevation with respect to Figure 1.
Description of the Preferred Embodiment In the form chosen for illustration and description herein the machine for salvaging waste concrete material comprises an elongated frame 28 10, the major portion of which is inclined with a horizontal end extension ~:~ 10~8789 11 on one end thereof. The elevated end of the inclined frame 10 is supported on legs 12. A receiving hopper 13 7s mounted on the frame 10 above the horizonta1 end portion 11 and Is of a size sufficient to receive the residual mtxed concrete from a ready mix truck along with an amount of rinse water averaging approximately 300 gallons more or less. Clean water - is introduced into the receiving hopper 13 as hereinafter described.
A movable apertured disc 14 controls the discharge from a lower end of the receiving hopper 13 into a well 15 in which a rotary elevator 16 is located. A plurality of buckets 17 are arranged in circumferentially spaced, radially positioned relation on the rotary elevator 16 so that ~ they will pick up the waste concrete material and water in the well 15 and discharge it into a charging chute 18 which extends through the open center of the rotary elevator 16 and into one end of a classifying drum 19 on which the rotary elevator 17 is mounted. The classifying drum l9 is rotatably positioned in spaced parallel relation to the inclined frame lO and supported by drive wheels 20 and idler wheels 21 as will be under-stood by those skilled in the art.
The classifying drum l9 is arranged to the drive and idler wheels 20 and 21 so that it rotates on its longitudinal axis and it is provided on its inner surface with a continuously extending spiral conveyor 22 so that the concrete material and water delivered into the lower end thereof from the charging chute 18 will be continuousiy conveyed toward the upper end of the classifying drum l9 with the large aggregate discharged out of the open upper end 23 thereof.
Intermediate portions of the classifying drum l9 are formed of open framework members 24, some of which are spirally arranged as at 25 to support the spiral conveyor 22 and a fine sand screen 26 covers one portion 28 of the classifying drum 19 and a coarse sand screen 27 covers an adjacent section thereof as best seen in Figures l and 4 of the drawings. It will be observed that the classifying drum is arranged in substantially equal quarter sections, the first section carrying the rotary elevator 16 has an unbroken cylindrical body, the second and third sections comprising the - fine sand screen 26 and the coarse sand screen 27 and the fourth section has an unbroken cylindrical wall defining the open end 23.
The lower three-fifths of the screen sections of the classifying drum 23 is positioned within a cross sectionally arcuate receiving trough 28 from which drain openings 29 and 30 provide a discharge route for the water, fine sand and cement, which are directed into an angularly disposed screw conveyor 33 which is positioned on the inclined frame 10 and parallel therewith. The screw conveyor 33 is positioned in a longitudinally extending trough. The water, the very fine sand and cement flows out of the trough and into a sump 31 which acts as a settling tank. A pipe 32 communicates therewith. The remaining material passes over the coarse screen 27 from which the coarse sands and small particles of aggregate and the like are discharged onto the screw conveyer 33 so that the coarse sand and the like are moved outwardly to a discharge end 34. The aggregate continues across the coarse screen 27 and through the upper quarter section of the classifying drum l9 and is discharged out of the upper end 23 of the classifying drum. The points of discharge are separated horizontally so that the recovered coarse sand and aggregate are deposited in several locations.
The means for rotating the classifying drum comprises an electric motor 36, as best seen in Figure 4 of the drawings, which is coupled to drive components 37 and 38 which includes gear reduction units connected to drive shafts 39 on which the drive wheels 20 are secured. A control 28 panel 35 on the frame lO directly controls the electric motor 36 as well ' ~ '' :: ;
` 1078789 as a motor drlven pump not shown which communicates with the pipe 32 leading from the sump or settling tank 31 as heretofore described.
Clean water from the sump or settlTng tank 31 or another source delivered to the machine by a delivery tube 40 which communicates with a supply pipe 41. A branch 42 of the supply pipe 41 communicates with a fine screen spray bar 43 located exteriorly of the fine sand screen 26 area of the classifying drum 19 so that water directed therefrom continually washes the fine sand and cement from the screen 26 and into the lower end of the screw conveyor 33 from whence it is discharged directly into the sump 31.
The supply pipe 41 extends along the frame 10 to a series of nozzles 44 in the lower end of the well 15, the arrangement being such that cement, fine sand and aggregate adhering to the rotary elevator 16 and the buckets 17 thereof are continuously removed therefrom. A further extension of the supply pipe 41 communicates with a spray bar 45 in the upper outer end of the receiving hopper 13.
It will thus be seen that a machine for salvaging wet c~ncrete material has been disclosed which receives, washes, classifies and separates the cement, fine and coarse sands and aggregates and makes the same available for reuse and at the same time and most importantly enables the residual mixed concrete in ready mix trucks and the like to be conveniently and desirably processed for an environmentally safe disposal.
Although but one embodiment of the present invention has been illustrated and described, it will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention.
' ~ :
Priot machines for this purpose have been proposed and one such machine is seen in U.S. Patent 2,942,731 of June 28, 1960 to R.B.
Soldini. An aggregate separating machine is seen in U.S. Patent No.
2,983,378 of May 9, 1961 to L.G. HiIkemeier and a gravel sepatator, a foundry sand reclaiming device and an ore washing apparatus are seen in U.S. Patents 2,836,299 of May 27, 1958 to E. Johnson and 2,331,135 of October 5, 1943 to ~. Ovestrud and 2,599,402 of June 3, 1952 to R.B.
Lindsey, respectively. Each of these patented devices incorporate a classi-fying drum into which material can be delivered. Each of the machines attempts separation and classification of the materials introduced and one of them, that of U.S. patent 2,942,731, attempts a washing action with respect to the concrete present in the concrete mix introduced into the machine. None of the disclosures incoude a practical means of receiv-ing a batch of mixed unset concrete from a ready mix truck and then deliver-ing it at a predetermined rate and volume which can be controlled by the operator as necessary with respect to the condition of the concrete being handled.
None of the disclosures include a practical means of receiving a batch of mixed unset concrete from a ready mix truck and then delivering it at a predetermined rate and volume which can be controlled by the operator as necessary with respect to the condition of the concrete being 28 hauled. None of the machines of the patents disclose a settling tank for _3_ ,~
.' '. " ~ :
- 107~789 settling out and recovering the fines, such as fine sands and the like, :
which constitute a substantial portion of the mixed concrete and none of the machines teach a practical and efficient apparatus for handling, washing and separating all of the material ;n wet concrete as highly desirable in considering the environmental impact of the dumping of such wet concrete indiscriminately as frequently takes place at the present time.
Summary of the Invention A machine for salvaging waste concrete material incorporates a receiving hopper capable of receiving a sizable amount of wet concrete from a ready mix truck, apparatus for selectively feeding the wet concrete at controlled rates into an inclined classifying and separating drum wherein water is introduced for washing cement from sand and aggregate present in the concrete mix with the resultant coarse sand and aggregate being classified as by size and discharged and the water mixed cement and fine sands and the like discharged into a sump and settling tank from which the fine sands and the like may be recovered and from which the clarified water may be recirculated.
Description of the Drawings Figure 1 is a side elevation with broken lines indicating hidden parts showing a mchine for salvaging wet concrete material;
Figure 2 is an end elevation on line 2-2 of Figure l;
Figure 3 is an opposite end elevation on line 3-3 of Figure I;
and Figure 4 is an opposite side elevation with respect to Figure 1.
Description of the Preferred Embodiment In the form chosen for illustration and description herein the machine for salvaging waste concrete material comprises an elongated frame 28 10, the major portion of which is inclined with a horizontal end extension ~:~ 10~8789 11 on one end thereof. The elevated end of the inclined frame 10 is supported on legs 12. A receiving hopper 13 7s mounted on the frame 10 above the horizonta1 end portion 11 and Is of a size sufficient to receive the residual mtxed concrete from a ready mix truck along with an amount of rinse water averaging approximately 300 gallons more or less. Clean water - is introduced into the receiving hopper 13 as hereinafter described.
A movable apertured disc 14 controls the discharge from a lower end of the receiving hopper 13 into a well 15 in which a rotary elevator 16 is located. A plurality of buckets 17 are arranged in circumferentially spaced, radially positioned relation on the rotary elevator 16 so that ~ they will pick up the waste concrete material and water in the well 15 and discharge it into a charging chute 18 which extends through the open center of the rotary elevator 16 and into one end of a classifying drum 19 on which the rotary elevator 17 is mounted. The classifying drum l9 is rotatably positioned in spaced parallel relation to the inclined frame lO and supported by drive wheels 20 and idler wheels 21 as will be under-stood by those skilled in the art.
The classifying drum l9 is arranged to the drive and idler wheels 20 and 21 so that it rotates on its longitudinal axis and it is provided on its inner surface with a continuously extending spiral conveyor 22 so that the concrete material and water delivered into the lower end thereof from the charging chute 18 will be continuousiy conveyed toward the upper end of the classifying drum l9 with the large aggregate discharged out of the open upper end 23 thereof.
Intermediate portions of the classifying drum l9 are formed of open framework members 24, some of which are spirally arranged as at 25 to support the spiral conveyor 22 and a fine sand screen 26 covers one portion 28 of the classifying drum 19 and a coarse sand screen 27 covers an adjacent section thereof as best seen in Figures l and 4 of the drawings. It will be observed that the classifying drum is arranged in substantially equal quarter sections, the first section carrying the rotary elevator 16 has an unbroken cylindrical body, the second and third sections comprising the - fine sand screen 26 and the coarse sand screen 27 and the fourth section has an unbroken cylindrical wall defining the open end 23.
The lower three-fifths of the screen sections of the classifying drum 23 is positioned within a cross sectionally arcuate receiving trough 28 from which drain openings 29 and 30 provide a discharge route for the water, fine sand and cement, which are directed into an angularly disposed screw conveyor 33 which is positioned on the inclined frame 10 and parallel therewith. The screw conveyor 33 is positioned in a longitudinally extending trough. The water, the very fine sand and cement flows out of the trough and into a sump 31 which acts as a settling tank. A pipe 32 communicates therewith. The remaining material passes over the coarse screen 27 from which the coarse sands and small particles of aggregate and the like are discharged onto the screw conveyer 33 so that the coarse sand and the like are moved outwardly to a discharge end 34. The aggregate continues across the coarse screen 27 and through the upper quarter section of the classifying drum l9 and is discharged out of the upper end 23 of the classifying drum. The points of discharge are separated horizontally so that the recovered coarse sand and aggregate are deposited in several locations.
The means for rotating the classifying drum comprises an electric motor 36, as best seen in Figure 4 of the drawings, which is coupled to drive components 37 and 38 which includes gear reduction units connected to drive shafts 39 on which the drive wheels 20 are secured. A control 28 panel 35 on the frame lO directly controls the electric motor 36 as well ' ~ '' :: ;
` 1078789 as a motor drlven pump not shown which communicates with the pipe 32 leading from the sump or settling tank 31 as heretofore described.
Clean water from the sump or settlTng tank 31 or another source delivered to the machine by a delivery tube 40 which communicates with a supply pipe 41. A branch 42 of the supply pipe 41 communicates with a fine screen spray bar 43 located exteriorly of the fine sand screen 26 area of the classifying drum 19 so that water directed therefrom continually washes the fine sand and cement from the screen 26 and into the lower end of the screw conveyor 33 from whence it is discharged directly into the sump 31.
The supply pipe 41 extends along the frame 10 to a series of nozzles 44 in the lower end of the well 15, the arrangement being such that cement, fine sand and aggregate adhering to the rotary elevator 16 and the buckets 17 thereof are continuously removed therefrom. A further extension of the supply pipe 41 communicates with a spray bar 45 in the upper outer end of the receiving hopper 13.
It will thus be seen that a machine for salvaging wet c~ncrete material has been disclosed which receives, washes, classifies and separates the cement, fine and coarse sands and aggregates and makes the same available for reuse and at the same time and most importantly enables the residual mixed concrete in ready mix trucks and the like to be conveniently and desirably processed for an environmentally safe disposal.
Although but one embodiment of the present invention has been illustrated and described, it will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention.
' ~ :
Claims (6)
1. In a machine for separating and salvaging cement, fine and coarse sand and aggregate from wet concrete material and water having an inclined frame, a classifying drum mounted for axial rotation above and parallel with said inclined frame and means for rotating said classifying drum; the improvement comprising forming said classifying drum with a first section adjacent its lower end incorporating an unbroken cylindrical wall, a second section adjacent thereto incorporating a fine sand screen cylindri-cal wall, a third section adjacent said second section incorporating a coarse sand screen cylindrical wall and a fourth section adjacent thereto incorporating an unbroken cylindrical wall with an open end, a spiral conveyor in said classifying drum attached to and extending continuously throughout said classifying drum, a receiving hopper and a well on said frame at the lower end thereof and adjacent the lower end of said classifying drum for receiving said wet concrete material and water, said hopper communicating with said well, a rotary elevator attached to the first section of said classifying drum for rotation therewith and partially disposed within said well and valve means comprising a movable apertured disc controlling communication between said hopper and said well, a discharge chute positioned through a central opening in said rotary elevator and extending into said first section of said classifying drum and arranged to receive said concrete material and water delivered thereto by said rotary elevator from said well and deliver said concrete material and water into said first section of said classifying drum, a receiving trough disposed under the screen cylindrical walls of said classifying drum for receiving water, cement and sand passing therethrough, openings in said receiving trough and a conveyor positioned on said frame and parallel therewith and be-neath said openings in said trough for moving fine and coarse sand from beneath said receiving trough, a settling tank and a sump positioned beneath said conveyor for receiving said water, cement and fine sand therefrom and a water supply system arranged for communication with a water source, a spray bar in communication with said water supply system and positioned exteriorly of said fine sand screen cylindrical wall of said classifying drum for directing water thereagainst, said water supply system extended to and communicating with said well and said receiving hopper and arranged for directly wash water against said rotary elevator.
2. The improvement in a machine for salvaging wet concrete material as set forth in Claim 1 and wherein said means for rotating said classifying drum include driven and idler wheels rotatably positioned above said frame and engaging the first and fourth sections of said classifying drum.
3. The improvement in a machine for salvaging wet concrete material as set forth in Claim 1 and wherein said means for rotating said classifying drum include driven and idler wheels rotatably positioned above said frame and engaging the first and fourth sections of said classifying drum, drive components including a source of rotary power arranged to rotate said drive wheels.
4. The improvement in a machine for salvaging wet concrete material as set forth in claim 1 and wherein said valve means controlling communication between said hopper and said wall comprises an apertured disc movable relative to said hopper whereby varying amounts of material from said hopper can be delivered to said well.
5. The machine for salvaging wet concrete material set forth in claim 1 and wherein said second section and said third section of said classifying drum are formed of open framework in a cylindrical shape with wire screen positioned over said open framework,
6. The machine for salvaging wet concrete material set forth in claim 1 and wherein said second section and said third section of said classifying drum are formed of open framework in a cylindrical shape with wire screen positioned over said open framework and wherein said spiral conveyor in said classifying drum is attached to the inner sides of said open framework in said second and third sections of said classifying drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA311,329A CA1078789A (en) | 1978-09-14 | 1978-09-14 | Machine for salvaging waste concrete material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA311,329A CA1078789A (en) | 1978-09-14 | 1978-09-14 | Machine for salvaging waste concrete material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1078789A true CA1078789A (en) | 1980-06-03 |
Family
ID=4112355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA311,329A Expired CA1078789A (en) | 1978-09-14 | 1978-09-14 | Machine for salvaging waste concrete material |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1078789A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106493161A (en) * | 2015-09-07 | 2017-03-15 | 李智路 | A kind of rotary screen formula municipal refuse terminal is sorted out, sorts, seals system up for safekeeping |
| CN108672259A (en) * | 2018-06-27 | 2018-10-19 | 中铁工程装备集团有限公司 | A kind of roller screening type quarrying case |
| CN109046754A (en) * | 2018-09-06 | 2018-12-21 | 甘肃省早子沟金矿有限责任公司 | Wet screening machine |
-
1978
- 1978-09-14 CA CA311,329A patent/CA1078789A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106493161A (en) * | 2015-09-07 | 2017-03-15 | 李智路 | A kind of rotary screen formula municipal refuse terminal is sorted out, sorts, seals system up for safekeeping |
| CN108672259A (en) * | 2018-06-27 | 2018-10-19 | 中铁工程装备集团有限公司 | A kind of roller screening type quarrying case |
| CN109046754A (en) * | 2018-09-06 | 2018-12-21 | 甘肃省早子沟金矿有限责任公司 | Wet screening machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |