Recycling and screening device for concrete aggregate

Abstract

The invention belongs to the technical field of concrete aggregate screening, and discloses a concrete aggregate recycling and screening device which comprises a limiting bin installed on the ground through a supporting support and further comprises a screening plate, and the screening plate is rotationally connected to the interior of the limiting bin through a bearing and used for screening concrete aggregate. Aggregate clamped in the screen holes of the screen body can be blown into the bearing plate through wind power through the arranged cleaning mechanism, due to the fact that the screen body rotates continuously, the screen holes can be cleaned continuously, the screen holes are prevented from being blocked, the screening effect is guaranteed, and due to the fact that the bearing plate is inclined, the screening effect is improved. The bearing plate is not perpendicular to airflow exhausted by the exhaust pipe, so that under continuous blowing of wind power, aggregate can directly slide along the surface of the bearing plate and directly fall down and be discharged at the end close to the second motor, the aggregate cleaned down from the screen holes cannot participate in screening again in the process, and therefore the aggregate is prevented from being clamped again, and the service life of the aggregate is prolonged. And the screening efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete aggregate screening, in particular to a concrete aggregate recovery and screening device. Background Art

[0002] Asphalt oil sand is a special mineral sand resource rich in natural asphalt. Asphalt concrete pavement contains asphalt oil sand. In the process of concrete aggregate recovery and screening, the asphalt oil sand is often separated by a combination of mechanical crushing and screening. First, the block material containing asphalt oil sand is crushed into smaller particles by a powerful mechanical crushing equipment. During the crushing process, part of the asphalt will peel off from the surface of the aggregate due to the relatively weak bonding force between asphalt and aggregates such as sand and their own different physical properties. After that, the aggregates of different particle size ranges and the asphalt fragments mixed therein are separated according to the particle size through a multi-layer screen screening device. Then, the part containing more asphalt can be further treated by heating or solvent extraction.

[0003] In the prior art, during the screening process after crushing, some crushed materials may get stuck in the sieve holes, thereby affecting the subsequent screening. For example, the invention patent with application number CN201710162728.8 discloses a recycled concrete aggregate screening device, the technical solution of which includes a support frame and a body, the body includes a shell and a sieve body rotatably connected in the shell and tilted, one end of the shell is connected to a feed hopper, sieve holes are distributed on the sieve body, a driving mechanism for driving the sieve body to rotate is arranged on the support frame, a mounting bar is fixed inside the shell, a push rod corresponding to the sieve hole is arranged along the axial direction of the rod, a push ball with a diameter larger than the sieve hole is fixed at the end of the push rod, and a first spring for pushing the push rod to keep the push ball trapped in the sieve hole is arranged between the push rod and the mounting bar. Therefore, when encountering aggregate stuck in some sieve holes, the push ball will continuously sink into each sieve hole during the rotation of the sieve body, and the aggregate stuck in the sieve hole will be pushed into the sieve body, so that it is very convenient to clean the aggregate stuck in the sieve hole and keep the sieve body in a good screening state.

[0004] The above patent uses a push ball to push the aggregate stuck in the sieve hole into the sieve body, thereby cleaning the sieve hole. However, this method causes the aggregate that is just stuck in the sieve hole to re-enter the sieve body for screening, and the cleaned aggregate will block the sieve hole again, which will still affect the screening. Therefore, improvements are made to address the above problems. Summary of the invention

[0005] In order to solve the problem proposed in the above background technology that the aggregate stuck in the sieve hole is pushed into the sieve body to clean the sieve hole, but the cleaned aggregate will block the sieve hole again, the present invention provides a concrete aggregate recovery and screening device.

[0006] To achieve the above object, the present invention provides the following technical solution: a concrete aggregate recovery and screening device, comprising a limit bin, the limit bin being installed on the ground through a support bracket, and further comprising: A sieve plate, which is rotatably connected to the interior of the limiting bin via a bearing and is used for screening concrete aggregates; A load-bearing plate, which is arranged inside the screen plate and is used to receive the aggregates that have been cleaned and blocked the screen holes; An adjusting mechanism, which is arranged at one side of the limiting bin and limits one end of the carrying plate through a transmission mechanism; A second motor, which is disposed at the other side of the limiting bin and connected to the other end of the carrying plate through a transmission mechanism; A driving mechanism, the driving mechanism is arranged on the supporting bracket and is used to drive the screen plate to rotate; A cleaning mechanism is arranged on the outer surface of the limiting bin and is used for cleaning the sieve holes on the sieve plate.

[0007] The adjustment mechanism includes a limit shell, a limit block, a threaded shaft and a connecting block. The limit shell and the limit block are fixedly mounted on the limit bin, the threaded shaft is rotatably connected to the middle part of the limit block, the connecting block is slidably connected to the limit bin and is threadedly connected to the threaded shaft, and the limit shell is sleeved on the surface of the limit shell, the limit block and the threaded shaft.

[0008] The transmission mechanism includes a rubber sleeve and a universal joint. The rubber sleeve is sleeved on the surfaces of both ends of the universal joint. There are two rubber sleeves in total. One end of the universal joint close to the adjustment mechanism is fixedly connected to the connecting block, and the other end is rotatably connected to the bearing plate. One end of the universal joint close to the second motor is slidably connected to the bearing plate, and the other end is fixedly connected to the output shaft of the second motor.

[0009] Preferably, the sieve plate includes a sieve body and a first gear, the sieve body is rotatably connected to the limiting bin via a bearing, the inner ring and outer ring of the bearing are fixedly connected to the outer surface of the sieve body and the inner wall of the limiting bin respectively, and the first gear is fixedly mounted on one end of the sieve body.

[0010] Preferably, the driving mechanism comprises a first motor and a second gear, the first motor is fixedly mounted on a supporting bracket, the second gear is fixedly mounted on an output shaft of the first motor, and the second gear is meshed with the first gear.

[0011] Preferably, the supporting plate is in a semi-conical shape, and there is a gap between the supporting plate and the screen body.

[0012] Preferably, the cleaning mechanism includes a fan, a connecting air duct, a connecting bin and an exhaust pipe, the fan is fixedly mounted on the surface of the limiting bin, the connecting bin is arranged at the top of the limiting bin, the air outlet of the fan is connected to the inside of the connecting bin through the connecting air duct, the exhaust pipe is fixedly mounted on the bottom of the connecting bin, and the exhaust pipe is fixedly connected to the limiting bin.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The cleaning mechanism of the present invention can blow the aggregate stuck in the sieve holes of the sieve body into the inside of the bearing plate through wind force. Since the sieve body is continuously rotating, the sieve holes can be continuously cleaned to prevent the sieve holes from being blocked and ensure the screening effect.

[0014] 2. In the present invention, since the supporting plate is inclined, the supporting plate and the airflow discharged from the exhaust pipe are not perpendicular. Therefore, under the continuous blowing of wind, the aggregate can directly slide along the surface of the supporting plate and fall directly to the end close to the second motor and be discharged. In this process, the aggregate cleaned from the sieve holes will not participate in the screening again, thereby preventing it from getting stuck again, thereby improving the screening efficiency.

[0015] 3. The present invention can drive the connection block to move downward by rotating the threaded shaft, so that the inclination direction of the bearing plate is opposite to the original direction. At this time, the bearing plate can be driven by the second motor to rotate to spread the concrete aggregate inside the sieve body and dig out a part of it. The excavated concrete aggregate is blown by the wind discharged from the exhaust pipe on the bearing plate and gradually falls back on the inner wall of the sieve body. In this way, when the concrete aggregate inside the sieve body is large and thick and affects the screening, the amount of aggregate to be screened can be reduced, thereby ensuring the normal operation and efficiency of the screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural cross-sectional view of the limiting bin of the present invention; Figure 3 It is a structural subdivision diagram of the cleaning mechanism of the present invention; Figure 4 It is a schematic diagram of the internal structure of the sieve body of the present invention; Figure 5 It is a structural breakdown diagram of the regulating mechanism of the present invention.

[0017] In the figure: 1. limit bin; 11. bearing; 12. support bracket; 2. sieve plate; 201. sieve body; 202. first gear; 3. adjustment mechanism; 301. limit housing; 302. limit block; 303. threaded shaft; 304. connecting block; 4. driving mechanism; 401. first motor; 402. second gear; 5. bearing plate; 6. cleaning mechanism; 601. fan; 602. connecting air duct; 603. connecting bin; 604. exhaust pipe; 7. transmission mechanism; 701. rubber sleeve; 702. universal joint; 8. second motor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figures 1 to 5 As shown, the present invention provides a recovery and screening device for concrete aggregates, comprising a limiting bin 1, which is installed on the ground through a supporting bracket 12, and also comprises a sieve plate 2, which is rotatably connected to the inside of the limiting bin 1 through a bearing 11 and is used for screening concrete aggregates; a bearing plate 5, which is arranged inside the sieve plate 2 and is used for receiving the aggregates that have been cleaned and block the sieve holes; an adjusting mechanism 3, which is arranged on one side of the limiting bin 1 and limits one end of the bearing plate 5 through a transmission mechanism 7; a second motor 8, which is arranged on the other side of the limiting bin 1 and is connected to the other end of the bearing plate 5 through a transmission mechanism 7; a driving mechanism 4, which is arranged on the supporting bracket 12 and is used for driving the sieve plate 2 to rotate; a cleaning mechanism 6, which is arranged on the outer surface of the limiting bin 1 and is used for cleaning the sieve holes on the sieve plate 2; a feeding port is arranged at one end of the limiting bin 1 close to the adjusting mechanism 3, a first discharging port is arranged at one end of the limiting bin 1 close to the second motor 8, and a second discharging port is arranged at the bottom of the limiting bin 1.

[0020] The above scheme is adopted: the cleaning mechanism 6 is set up to blow the aggregate stuck in the sieve holes of the sieve body 201 into the inside of the supporting plate 5 through wind force. Since the supporting plate 5 is inclined, the supporting plate 5 and the air duct are not perpendicular. Therefore, under the continuous blowing of wind force, the aggregate can directly slide along the surface of the supporting plate 5 and fall directly to the end close to the second motor 8 and be discharged. In this process, the aggregate cleaned from the sieve holes will not participate in the screening again, thereby preventing it from getting stuck again, thereby improving the screening efficiency.

[0021] like Figure 2 and Figure 3As shown, the sieve plate 2 includes a sieve body 201 and a first gear 202. The sieve body 201 is rotatably connected to the limiting bin 1 through a bearing 11. The inner ring and the outer ring of the bearing 11 are fixedly connected to the outer surface of the sieve body 201 and the inner wall of the limiting bin 1 respectively. The first gear 202 is fixedly installed at one end of the sieve body 201; the driving mechanism 4 includes a first motor 401 and a second gear 402. The first motor 401 is fixedly installed on the supporting bracket 12, and the second gear 402 is fixedly installed on the output shaft of the first motor 401. The second gear 402 is meshed with the first gear 202.

[0022] The above scheme is adopted: the second gear 402 is driven to rotate by the first motor 401, thereby driving the first gear 202 to rotate. When the first gear 202 rotates, it drives the screen body 201 to rotate, thereby realizing the screening of concrete aggregates. The provided bearing 11 can support the screen body 201 inside the limiting bin 1, and can also reduce the friction force when the screen body 201 rotates.

[0023] like Figure 5 As shown, the adjustment mechanism 3 includes a limit shell 301, a limit block 302, a threaded shaft 303 and a connecting block 304. The limit shell 301 and the limit block 302 are fixedly installed on the limit bin 1, the threaded shaft 303 is rotatably connected to the middle part of the limit block 302, the connecting block 304 is slidably connected to the limit bin 1 and is threadedly connected to the threaded shaft 303, and the limit shell 301 is sleeved on the surfaces of the limit shell 301, the limit block 302 and the threaded shaft 303.

[0024] The above scheme is adopted: the limiting shell 301 is set to protect the limiting shell 301, the limiting block 302 and the threaded shaft 303. This is because the place is close to the feed port, preventing concrete aggregate from entering between the above structures and affecting the normal operation of the structure. By rotating the threaded shaft 303, the connecting block 304 can be driven to move up and down. When the connecting block 304 moves down to the bottom, the inclination direction of the supporting plate 5 is opposite to the original. At this time, the supporting plate 5 can be driven by the second motor 8 to rotate to spread the concrete aggregate inside the screen body 201 and dig out a part of it. The excavated concrete aggregate is blown by the wind discharged from the exhaust pipe 604 on the supporting plate 5 and gradually falls back on the inner wall of the screen body 201. In this way, when the concrete aggregate inside the screen body 201 is more and thicker and affects the screening, the amount of aggregate to be screened can be reduced, thereby ensuring the normal operation of the screening and the efficiency of the screening.

[0025] like Figure 5As shown, the transmission mechanism 7 includes a rubber sleeve 701 and a universal joint 702. The rubber sleeve 701 is sleeved on the two end surfaces of the universal joint 702. There are two rubber sleeves 701. One end of the universal joint 702 close to the adjustment mechanism 3 is fixedly connected to the connecting block 304, and the other end is rotatably connected to the supporting plate 5; one end of the universal joint 702 close to the second motor 8 is slidably connected to the supporting plate 5, and the other end is fixedly connected to the output shaft of the second motor 8.

[0026] By adopting the above scheme, the universal joint 702 can be protected by the rubber sleeve 701 to prevent the screened aggregate from affecting the universal joint 702, and through this connection form, the supporting plate 5 can be rotated at different inclinations, thereby achieving the purpose of realizing different functions of the supporting plate 5 at different inclinations.

[0027] like Figure 4 and Figure 5 As shown, the supporting plate 5 is in a semi-conical shape, and there is a gap between the supporting plate 5 and the screen body 201 .

[0028] The above scheme is adopted: the supporting plate 5 is located at the upper end of the screen body 201 and does not contact the screen body 201, and will not affect the rotation of the screen body 201 to screen the internal concrete aggregate. The shape of the supporting plate 5 has a good receiving effect, and can collect the aggregate stuck in the sieve hole blown down by the exhaust pipe 604. Moreover, since the supporting plate 5 has a certain inclination, the wind blown out by the exhaust pipe 604 is not perpendicular to the supporting plate 5, which makes the airflow refracted and deflected after contacting the supporting plate 5. At this time, the airflow will drive the aggregate on the supporting plate 5 to move toward the first discharge port on the limiting bin 1, directly skipping the screening process. This is because the aggregate on the supporting plate 5 can be stuck in the sieve hole, which means that its size is too large to pass the screening.

[0029] like Figure 3 As shown, the cleaning mechanism 6 includes a fan 601, a connecting air duct 602, a connecting bin 603 and an exhaust pipe 604. The fan 601 is fixedly installed on the surface of the limiting bin 1, the connecting bin 603 is arranged on the top of the limiting bin 1, and the air outlet of the fan 601 is connected to the inside of the connecting bin 603 through the connecting air duct 602. The exhaust pipe 604 is fixedly installed on the bottom of the connecting bin 603, and the exhaust pipe 604 is fixedly connected to the limiting bin 1.

[0030] The above scheme is adopted: wind is generated by the fan 601, and the wind is transmitted to the connecting bin 603 through the connecting air duct 602, the wind evenly enters the exhaust pipe 604 through the connecting bin 603 and blows toward the sieve holes at the top of the sieve body 201, when aggregate is stuck in the sieve holes at the top of the sieve body 201, the aggregate will receive the downward force of its own gravity and the thrust of the airflow discharged into the sieve holes through the exhaust pipe 604, which can ensure that the aggregate smoothly leaves the sieve holes, and the wind can also enter the interior of the sieve body 201 through the sieve holes, especially the top of the supporting plate 5, to realize the pushing effect on the aggregate on the top of the supporting plate 5.

[0031] The working principle and use process of the present invention: When in use, concrete aggregate is put into the screen body 201 through the feed port, and then the first motor 401 is started to drive the second gear 402 to rotate, and the second gear 402 drives the screen body 201 to rotate through the first gear 202 to screen the internal concrete aggregate; During the screening process, due to the movement and coverage between the aggregates, some aggregates will be stuck in the sieve holes. The fan 601 is started synchronously to generate wind force. The airflow passes through the connecting air duct 602 and the connecting bin 603 and is discharged downward through the exhaust pipe 604. The exhaust pipe 604 is directly opposite to the sieve holes on the sieve body 201. The aggregates stuck in the sieve holes can be blown down to the carrying plate 5 through the airflow. Then the airflow passes through the sieve holes to reach the surface of the carrying plate 5, and the aggregates on the carrying plate 5 are blown toward the direction of the first discharge port and discharged; When too much concrete aggregate is poured in at one time, the aggregate will accumulate inside the sieve body 201, which will affect the screening effect. At this time, the threaded shaft 303 is rotated to drive the connecting block 304 to move downward, and the bearing plate 5 is driven to tilt in the opposite direction. At this time, the rubber sleeve 701 close to one end of the second motor 8 will slide inside the bearing plate 5 to compensate for the movement. After the adjustment is completed, the second motor 8 is started to drive the bearing plate 5 to rotate one circle through the transmission mechanism 7. The bearing plate 5 can flatten the thicker and more aggregate inside the sieve body 201 and dig a part of the aggregate onto the surface of the bearing plate 5, thereby reducing the amount of aggregate screened inside the sieve body 201. As the fan 601 continues to work, the airflow will gradually blow the aggregate on the surface of the bearing plate 5 to the vicinity of the feed port, thereby reducing the accumulation of excessive aggregate in the same area.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete aggregate recovery and screening device, comprising a limiting bin (1), wherein the limiting bin (1) is installed on the ground via a supporting bracket (12), characterized in that: Also includes, A sieve plate (2), the sieve plate (2) being rotatably connected to the interior of the limiting bin (1) via a bearing (11) and being used for screening concrete aggregates; A load-bearing plate (5), the load-bearing plate (5) being arranged inside the sieve plate (2) and being used to receive the aggregates that have been cleaned out and block the sieve holes or to dig out a portion of the concrete aggregates that are piled up to be screened; An adjusting mechanism (3), wherein the adjusting mechanism (3) is arranged on one side of the limiting bin (1) and limits one end of the carrying plate (5) through a transmission mechanism (7); A second motor (8), the second motor (8) being arranged at the other side of the limiting bin (1) and connected to the other end of the carrying plate (5) via a transmission mechanism (7); A driving mechanism (4), the driving mechanism (4) being arranged on the supporting bracket (12) and being used to drive the screen plate (2) to rotate; A cleaning mechanism (6), wherein the cleaning mechanism (6) is arranged on the outer surface of the limiting bin (1) and is used to clean the sieve holes on the sieve plate (2); The adjustment mechanism (3) comprises a limiting shell (301), a limiting block (302), a threaded shaft (303) and a connecting block (304); the limiting shell (301) and the limiting block (302) are both fixedly mounted on the limiting bin (1); the threaded shaft (303) is rotatably connected to the middle part of the limiting block (302); the connecting block (304) is slidably connected to the limiting bin (1) and is threadedly connected to the threaded shaft (303); the limiting shell (301) is sleeved on the surfaces of the limiting shell (301), the limiting block (302) and the threaded shaft (303); The transmission mechanism (7) comprises a rubber sleeve (701) and a universal joint (702), wherein the rubber sleeve (701) is sleeved on the surfaces of both ends of the universal joint (702), and there are two rubber sleeves (701) in total, wherein the universal joint (702) close to the adjustment mechanism (3) has one end fixedly connected to the connection block (304) and the other end rotatably connected to the bearing plate (5); One end of the universal joint (702) close to the second motor (8) is slidably connected to the bearing plate (5), and the other end is fixedly connected to the output shaft of the second motor (8).

2. The concrete aggregate recovery and screening device according to claim 1, characterized in that: The sieve plate (2) comprises a sieve body (201) and a first gear (202); the sieve body (201) is rotatably connected to the limiting bin (1) via a bearing (11); an inner ring and an outer ring of the bearing (11) are fixedly connected to the outer surface of the sieve body (201) and the inner wall of the limiting bin (1), respectively; and the first gear (202) is fixedly mounted on one end of the sieve body (201).

3. The concrete aggregate recovery and screening device according to claim 2, characterized in that: The driving mechanism (4) comprises a first motor (401) and a second gear (402), wherein the first motor (401) is fixedly mounted on a support bracket (12), and the second gear (402) is fixedly mounted on an output shaft of the first motor (401), and the second gear (402) is meshed with the first gear (202).

4. The concrete aggregate recovery and screening device according to claim 2, characterized in that: The supporting plate (5) is in the shape of a semi-cone, and there is a gap between the supporting plate (5) and the screen body (201).

5. The concrete aggregate recovery and screening device according to claim 1, characterized in that: The cleaning mechanism (6) comprises a fan (601), a connecting air duct (602), a connecting bin (603) and an exhaust pipe (604); the fan (601) is fixedly mounted on the surface of the limiting bin (1); the connecting bin (603) is arranged on the top of the limiting bin (1); the air outlet of the fan (601) is connected to the inside of the connecting bin (603) via the connecting air duct (602); the exhaust pipe (604) is fixedly mounted on the bottom of the connecting bin (603); and the exhaust pipe (604) is fixedly connected to the limiting bin (1).

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