Aggregate screening device for recycled concrete

Abstract

The present invention discloses an aggregate screening device for recycled concrete, which relates to the technical field of recycled concrete. The aggregate screening device for recycled concrete comprises a processing box and a feed pipe installed on the processing box. A partition is fixed inside the processing box, and the processing box forms a first chamber and a second chamber under the dividing action of the partition. The first chamber and the second chamber are connected, and one end of the feed pipe is located inside the first chamber. In the aggregate screening device for recycled concrete, during the screening process of the recycled concrete by the processing box, the concrete aggregate to be screened is sorted and filtered through the filter screens on each conical sorting box. The internal filtration of each conical sorting box collects concrete aggregate to be screened with similar particle size, so that the resistance generated between the brick material and the concrete material on the aggregate when they are sinking and rising in layers is relatively small, thereby ensuring the efficiency of the aggregate stratification screening inside the conical sorting box.

Description

Technical Field

[0001] The invention relates to the technical field of recycled concrete, in particular to an aggregate screening device for recycled concrete. Background Art

[0002] Recycled concrete is made by crushing, cleaning, and grading discarded concrete blocks, mixing them with a specific proportion and grading, and then adding cement and water to partially or completely replace natural aggregates such as sand and gravel. Recycled concrete can be made using the following aggregate combinations: all recycled aggregate; recycled coarse aggregate and natural sand; natural crushed stone or pebbles; recycled fine aggregate; or recycled aggregate replacing part of either coarse or fine aggregate.

[0003] In comparison, a recycled concrete aggregate screening system with patent number CN111892318A includes a separation module and a screening module connected to the separation module through a pipeline; the separation module includes a centrifugal box, a centrifugal drive motor located at the bottom of the centrifugal box, and a turntable located on the upper side of the centrifugal drive motor. The exterior of the centrifugal box is cylindrical, and the interior is provided with a conical centrifugal bin with a diameter gradually decreasing downward. This invention has the ability to separate bricks and concrete materials and separate concrete materials of different volumes. At the same time, when separating bricks and concrete materials, no power is required, which is energy-saving and environmentally friendly.

[0004] When the above-mentioned recycled concrete aggregate screening system screens the crushed aggregate, the particle size of the crushed aggregate is uneven, and some aggregates with larger particle sizes will hinder the upward movement of aggregates with smaller particle sizes, reducing the internal stratification effect and the stratification efficiency. Summary of the Invention

[0005] The object of the present invention is to provide an aggregate screening device for recycled concrete to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a device for screening aggregate for recycled concrete, comprising a processing box and a feed pipe mounted on the processing box, wherein a partition is fixed inside the processing box, and the processing box forms a first chamber and a second chamber under the dividing action of the partition, the first chamber and the second chamber being in communication with each other, one end of the feed pipe is located inside the first chamber, a plurality of conical sorting boxes are vertically arranged on the first chamber, a filter is fixed at the bottom of the conical sorting box, and the aperture of the filter on each conical sorting box is arranged to decrease from top to bottom, a plurality of connecting plates are fixed on the side wall of the lower end of the conical sorting box, and the upper and lower conical sorting boxes are integrally connected under the action of each connecting plate, a rotating assembly for rotating the conical sorting box is provided at the lower end of the processing box, and each of the conical sorting boxes is provided with a screening and discharging assembly for screening and discharging materials after sorting, and a recovery assembly for recovering recycled fine aggregate during the feeding process of recycled concrete is provided on the first chamber.

[0007] Preferably, the rotating assembly includes an L-shaped plate fixed to the lower end of the processing box, a rotating shaft is rotatably connected to the L-shaped plate, and a mounting shaft is rotatably connected to the processing box. One end of the mounting shaft is located inside the first chamber and is fixed to the lowest conical sorting box. The rotating shaft and the mounting shaft are concentrically arranged and connected through a transmission assembly. A driving motor for driving the rotating shaft is installed on the L-shaped plate, and a vibration assembly is provided on the mounting shaft to facilitate the efficient transportation and filtration of recycled concrete from the conical sorting box.

[0008] Preferably, the transmission assembly includes a plurality of spline grooves provided at one end of the rotating shaft, each of the spline grooves is slidably connected to a spline pin, and one end of each of the spline pins is fixed to one end of the mounting shaft.

[0009] Preferably, the vibration component includes a strip plate, a fixing pin is fixed on the upper end of the strip plate, an annular plate is fixed on the side wall of the mounting shaft, the annular plate is located above the strip plate, and a plurality of protrusions for pushing against the fixing pin are fixed in an annular array at the lower end of the annular plate, and a contraction component for contracting the strip plate is provided at the lower end of the processing box.

[0010] Preferably, the shrinkage assembly includes a fixed frame fixed to the lower end of the processing box, and a plurality of first T-shaped rods are slidably connected to the fixed frame, one end of each of the first T-shaped rods is fixed to the strip plate, and a first mounting plate is fixed to the upper end of the strip plate, and a first iron block and a first electromagnet are respectively installed on the side of the first mounting plate opposite to the fixed frame, and a first spring is sleeved on the side wall of each of the first T-shaped rods.

[0011] Preferably, the screening and discharging assembly includes a plurality of annular screening frames sleeved on the outside of the conical sorting box, and each of the annular screening frames is fixed with an annular baffle on the side close to the conical sorting box. The conical sorting box is provided with a plurality of discharge troughs, and each discharge trough is blocked under the counteraction of each annular baffle. A mounting frame is fixed on the first chamber, and a plurality of conveying pipes are installed on the mounting frame, and one end of each of the conveying pipes is connected to each annular screening frame respectively. A lifting assembly for lifting the annular screening frame is installed on the mounting frame, and the two adjacent annular screening frames are connected by a plurality of connecting blocks so that the annular screening frames can keep rising and falling synchronously. A rubber pad is provided on the side of the annular screening frame that is against the conical sorting box to facilitate the annular screening frame to keep against the conical sorting box during the lifting process.

[0012] Preferably, the lifting assembly includes a second mounting plate fixed to one side of the mounting frame, and a plurality of second T-shaped rods are slidably connected to the second mounting plate, one end of each second T-shaped rod is fixed to the topmost annular screening frame on the outside of the conical sorting box, and a second spring is sleeved on the side wall of each second T-shaped rod, and a second electromagnet and a second iron block are respectively fixed between the second mounting plate and the annular screening frame.

[0013] Preferably, the recovery component includes an air pipe installed on the first chamber, one end of the air pipe is located below the feed pipe, a first slide groove and a second slide groove are provided on the processing box, the first slide groove is located above the second slide groove, and the first slide groove and the second slide groove are connected to the interior of the second chamber, one end of the air pipe is connected to the interior of the second slide groove, and the first recovery frame and the second recovery frame are respectively slidably connected to the first recovery frame and the second recovery frame. Filter plates for filtration are installed on the first recovery frame and the second recovery frame, and a blowing component for blowing air is provided on the air pipe.

[0014] Preferably, the blowing assembly includes a support frame fixed inside the air pipe, an operating shaft is rotatably connected to the support frame, a fan blade is fixed to one end of the operating shaft, and a driving assembly for driving the operating shaft is provided on the rotating shaft.

[0015] Preferably, the driving assembly includes a transmission shaft rotatably connected to the L-shaped plate, one end of the transmission shaft is located inside the trachea and is fixed with a first bevel gear, one end of the operating shaft is fixed with a second bevel gear, the first bevel gear and the second bevel gear are meshed with each other, a third bevel gear is fixed on the rotating shaft, and one end of the transmission shaft is fixed with a fourth bevel gear, the third bevel gear and the fourth bevel gear are meshed with each other.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This type of aggregate screening device for recycled concrete, during the process of the processing box screening the recycled concrete, the concrete aggregate to be screened is sorted and filtered through the filter screens on each conical sorting box. The internal filtration of each conical sorting box collects concrete aggregate to be screened with similar particle size, so that the resistance generated between the brick material and the concrete material on the aggregate when they are sinking and rising in layers is relatively small, thereby ensuring the efficiency of the aggregate layer screening inside the conical sorting box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall appearance structure of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the rotating assembly, transmission assembly, vibration assembly and contraction assembly of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the processing box of the present invention;

[0021] Figure 4 This is a schematic diagram of the recycling component structure of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the blowing assembly and the driving assembly of the present invention;

[0023] Figure 6 This is a structural diagram of a cone-type sorting box according to the present invention;

[0024] Figure 7 It is a schematic structural diagram of the lifting assembly of the present invention;

[0025] Figure 8 This is a schematic structural diagram of the discharge assembly of the present invention;

[0026] Figure 9 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 10 for Figure 5 Schematic diagram of the enlarged structure at B in the middle;

[0028] Figure 11 for Figure 7 Schematic diagram of the enlarged structure at point C in the middle.

[0029] In the figure: 101, processing box; 102, feeding pipe; 2, partition; 3, cone-shaped sorting box; 4, filter screen; 5, connecting plate; 6, rotating assembly; 601, L-shaped plate; 602, rotating shaft; 603, mounting shaft; 604, driving motor; 7, transmission assembly; 701, spline groove; 702, spline pin; 8, vibration assembly; 801, strip plate; 802, fixing pin; 803, annular plate; 804, protrusion; 9, shrinking assembly; 901, fixing frame; 902, first T-bar; 903, first mounting plate; 904, first iron block; 905, first electromagnet; 906, first spring; 10, discharging assembly; 1001, annular screening frame; 1002, annular baffle; 1 003, discharge chute; 1004, mounting bracket; 1005, conveying pipe; 11, lifting assembly; 1101, second mounting plate; 1102, second T-bar; 1103, second spring; 1104, second electromagnet; 1105, second iron block; 12, recovery assembly; 1201, air pipe; 1202, first chute; 1203, first recovery frame; 1204, second chute; 1205, second recovery frame; 1206, filter plate; 13, blowing assembly; 1301, operating shaft; 1302, fan blade; 14, driving assembly; 1401, transmission shaft; 1402, first bevel gear; 1403, second bevel gear; 1404, third bevel gear; 1405, fourth bevel gear. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1-11The present invention provides a technical solution: an aggregate screening device for recycled concrete, comprising a processing box 101 and a feed pipe 102 installed on the processing box 101, a partition 2 is fixed inside the processing box 101, and the processing box 101 forms a first chamber and a second chamber under the dividing action of the partition 2, the first chamber and the second chamber are communicated, one end of the feed pipe 102 is located inside the first chamber, a plurality of conical sorting boxes 3 are vertically arranged on the first chamber, a filter screen 4 is fixed at the bottom of the conical sorting box 3, and the aperture of the filter screen 4 on each conical sorting box 3 is sequentially reduced from top to bottom, a plurality of connecting plates 5 are fixed on the side wall of the lower end of the conical sorting box 3, and the upper and lower conical sorting boxes 3 are integrated under the action of each connecting plate 5 The processing box 101 is connected, and the lower end of the processing box 101 is provided with a rotating component 6 for rotating the conical sorting box 3. Each conical sorting box 3 is provided with a screening and discharging component 10 for screening the material after sorting. The first chamber is provided with a recovery component 12 for recovering recycled fine aggregate during the feeding process of recycled concrete. In the process of the processing box 101 screening the recycled concrete, the filter screen 4 on each conical sorting box 3 is used to sort and filter the concrete aggregate to be screened. The internal filtration of each conical sorting box 3 collects the concrete aggregate to be screened with a similar particle size, so that the resistance between the brick material and the concrete material on the aggregate is relatively small when they are sinking and rising in layers, respectively, to ensure the efficiency of the aggregate stratification screening inside the conical sorting box 3.

[0032] The rotating assembly 6 includes an L-shaped plate 601 fixed to the lower end of the processing box 101, and a rotating shaft 602 is rotatably connected to the L-shaped plate 601. A mounting shaft 603 is rotatably connected to the processing box 101. One end of the mounting shaft 603 is located inside the first chamber and is fixed to the lowest conical sorting box 3. The rotating shaft 602 and the mounting shaft 603 are concentrically arranged and connected by a transmission assembly 7. A driving motor 604 for driving the rotating shaft 602 is installed on the L-shaped plate 601, and a vibration assembly 8 is provided on the mounting shaft 603 for facilitating efficient transportation and filtration of recycled concrete from the conical sorting box 3. The driving motor 604 drives the rotating shaft 602 to rotate. During the rotation of the rotating shaft 602, the connection transmission action between the spline groove 701 and the spline pin 702 drives the mounting shaft 603 to rotate. During the rotation of the mounting shaft 603, each conical sorting box 3 is driven to rotate inside the processing box 101.

[0033] The transmission assembly 7 includes a plurality of spline grooves 701 provided at one end of the rotating shaft 602, and each spline groove 701 is slidably connected to a spline pin 702, and one end of each spline pin 702 is fixed to one end of the mounting shaft 603. The rotating shaft 602 is driven to rotate by the driving motor 604. During the rotation of the rotating shaft 602, the mounting shaft 603 is driven to rotate through the connection transmission action between the spline groove 701 and the spline pin 702.

[0034] The vibration assembly 8 includes a strip plate 801, a fixing pin 802 is fixed to the upper end of the strip plate 801, and an annular plate 803 is fixed to the side wall of the mounting shaft 603. The annular plate 803 is located above the strip plate 801, and a plurality of protrusions 804 for resisting and pushing against the fixing pin 802 are fixed in an annular array at the lower end of the annular plate 803. The lower end of the processing box 101 is provided with a contraction assembly 9 for contracting the strip plate 801. During the rotation of the mounting shaft 603, the protrusions 804 on the annular plate 803 successively resist the fixing pin 802 and the mounting shaft 603 falls and resets under its own gravity, so that the mounting shaft 603 reciprocates up and down at the bottom of the processing box 101 while rotating. The reciprocating motion of the mounting shaft 603 causes each conical sorting box 3 to reciprocate up and down, vibrating the filter screen 4 inside the conical sorting box 3, thereby ensuring the efficiency of filtering and collecting the concrete aggregate to be screened from each filter screen 4.

[0035] The shrinking assembly 9 includes a fixing frame 901 fixed to the lower end of the processing box 101, and a plurality of first T-shaped rods 902 are slidably connected to the fixing frame 901, and one end of each first T-shaped rod 902 is fixed to the strip plate 801, and a first mounting plate 903 is fixed to the upper end of the strip plate 801, and a first iron block 904 and a first electromagnet 905 are respectively installed on the side of the first mounting plate 903 opposite to the fixing frame 901. A first spring 906 is sleeved on the side wall of each first T-shaped rod 902, and the first electromagnet 905 is energized. After the first electromagnet 905 is energized, the magnetic force between the first electromagnet 905 and the first iron block 904 and the guiding effect of each first T-shaped rod 902 drive the strip plate 801 to shrink, so that when the annular plate 803 rotates, the various protrusions 804 no longer resist the fixing pin 802, so that the various conical sorting boxes 3 inside the processing box 101 only rotate without vibrating up and down, thereby avoiding the up and down vibration affecting the stratification effect.

[0036] The screening and discharging component 10 includes a plurality of annular screening frames 1001 sleeved on the outside of the conical sorting box 3, and each annular screening frame 1001 is fixed with an annular baffle 1002 on the side close to the conical sorting box 3. A plurality of discharge troughs 1003 are provided on the conical sorting box 3, and each discharge trough 1003 is blocked under the counteraction of each annular baffle 1002. A mounting frame 1004 is fixed on the first chamber, and a plurality of conveying pipes 1005 are installed on the mounting frame 1004. One end of each conveying pipe 1005 is connected to each annular screening frame 1001, and a lifting component 11 for lifting the annular screening frame 1001 is installed on the mounting frame 1004. The two adjacent annular screening frames 1001 are lifted and lowered. 001 are connected by multiple connecting blocks so that the annular screening frames 1001 can be kept rising and falling synchronously. A rubber pad is provided on the side of the annular screening frame 1001 that abuts against the conical sorting box 3 to facilitate the annular screening frame 1001 to keep against the conical sorting box 3 during the lifting process. Through the lifting component 11, the annular screening frames 1001 outside the conical sorting box 3 are driven to rise, so that the annular screening frames 1001 are communicated with the various discharge troughs 1003 on the conical sorting box 3. At this time, as the conical sorting box 3 continues to rotate, the stratified aggregates are transported outward through the annular screening frame 1001 and the conveying pipe 1005 and collected by the action of centrifugal force, completing the screening and collection of recycled concrete aggregates.

[0037] The lifting assembly 11 includes a second mounting plate 1101 fixed to one side of the mounting frame 1004, and a plurality of second T-shaped rods 1102 are slidably connected to the second mounting plate 1101, and one end of each second T-shaped rod 1102 is fixed to the uppermost annular screening frame 1001 on the outer side of the conical sorting box 3, and a second spring 1103 is sleeved on the side wall of each second T-shaped rod 1102. A second electromagnet 1104 and a second iron block 1105 are respectively fixed between the second mounting plate 1101 and the annular screening frame 1001. When the second electromagnet 1104 is energized, the energized second electromagnet 1104 drives the annular screening frame 1001 to move upward under the action of the magnetic force between the second electromagnet 1104 and the second iron block 1105 and the guidance of the second T-shaped rods 1102. When it needs to be lowered, the second electromagnet 1104 is de-energized, and the annular screening frame 1001 is reset under the action of its own gravity and the second spring 1103.

[0038] The recycling component 12 includes an air pipe 1201 installed on the first chamber, one end of the air pipe 1201 is located below the feed pipe 102, a first chute 1202 and a second chute 1204 are provided on the processing box 101, the first chute 1202 is located above the second chute 1204, and the first chute 1202 and the second chute 1204 are connected to the interior of the second chamber, one end of the air pipe 1201 is connected to the interior of the second chute 1204, and the first recycling frame 1203 and the second recycling frame 1205 are slidably connected to the first chute 1202 and the second chute 1204 respectively. A filter plate 1206 for filtering is installed on 205, and a blowing component 13 for blowing is provided on the air pipe 1201. Through the recovery component 12, the dust and recycled fine aggregate on the concrete aggregate to be screened are separated from the recycled concrete and flow to the second chamber and pass between the first chute 1202 and the second chute 1204. During the passing process, the recycled fine aggregate is filtered and collected by the filter plate 1206 on the first recovery frame 1203, and then the dust is collected by the filter plate 1206 on the second recovery frame 1205, which is convenient for dust reduction and recycling of recycled fine aggregate during the concrete aggregate screening process.

[0039] The blowing assembly 13 includes a support frame fixed inside the air pipe 1201, and an operating shaft 1301 is rotatably connected to the support frame. A fan blade 1302 is fixed to one end of the operating shaft 1301. A driving assembly 14 for driving the operating shaft 1301 is provided on the rotating shaft 602. Through the blowing assembly 13, air is evacuated from the inside of the second slide groove 1204 and blown out from the other end of the air pipe 1201.

[0040] The driving assembly 14 includes a transmission shaft 1401 rotatably connected to the L-shaped plate 601, one end of the transmission shaft 1401 is located inside the trachea 1201 and is fixed with a first bevel gear 1402, and one end of the operating shaft 1301 is fixed with a second bevel gear 1403, the first bevel gear 1402 and the second bevel gear 1403 are meshed with each other, a third bevel gear 1404 is fixed on the rotating shaft 602, and one end of the transmission shaft 1401 is fixed with a fourth bevel gear 1405, the third bevel gear 1404 and the fourth bevel gear 1405 are meshed with each other. During the rotation of the rotating shaft 602, the transmission shaft 1401 is driven to rotate through the mutual meshing transmission between the third bevel gear 1404 and the fourth bevel gear 1405. During the rotation of the transmission shaft 1401, the fan blades 1302 at one end of the operating shaft 1301 are driven to rotate through the mutual meshing transmission between the first bevel gear 1402 and the second bevel gear 1403.

[0041] Working principle: During the screening process of recycled concrete by the processing box 101, the concrete aggregate to be screened is transported to the interior of the processing box 101 through the feeding pipe 102, and passes through each cone-shaped sorting box 3 in turn due to its own falling action. Since a filter screen 4 is fixed at the bottom of each cone-shaped sorting box 3, and the aperture of the filter screen 4 on each cone-shaped sorting box 3 is set to decrease from top to bottom, the concrete aggregate to be screened is sorted and filtered by each filter screen 4 during the process of passing through each cone-shaped sorting box 3, so that the interior of each cone-shaped sorting box 3 filters and collects the concrete aggregate to be screened with a similar particle size. During the process of the concrete aggregate to be screened circulating on each cone-shaped sorting box 3, the driving motor 604 drives the rotating shaft 602 to rotate. During the rotation of the shaft 602, the connection and transmission between the spline groove 701 and the spline pin 702 drives the installation shaft 603 to rotate. During the rotation of the installation shaft 603, each cone-shaped sorting box 3 is driven to rotate inside the processing box 101. During the rotation of the installation shaft 603, the projections 804 on the annular plate 803 counteract the fixed pin 802 in sequence, and the installation shaft 603 falls and resets under its own gravity, so that the installation shaft 603 reciprocates up and down at the bottom of the processing box 101 while rotating. The reciprocating motion of the installation shaft 603 causes each cone-shaped sorting box 3 to reciprocate up and down, vibrating the filter screen 4 inside the cone-shaped sorting box 3, thereby ensuring the efficiency of filtering and collecting the concrete aggregate to be screened from each filter screen 4.

[0042] After the conveying, filtering and collection of the concrete aggregate to be screened are completed, the rotating component 6 and the transmission component 7 continue to drive each cone-shaped sorting box 3 to rotate inside the processing box 101, and then the contraction component 9 drives the strip plate 801 to contract, so that the protrusions 804 of the annular plate 803 no longer resist the fixed pin 802 during rotation, so that the cone-shaped sorting boxes 3 inside the processing box 101 only rotate without vibrating up and down. In the process of rotating the cone-shaped sorting boxes 3, under the action of centrifugal force, the lighter concrete material on the aggregate adheres to the inner wall of the cone-shaped sorting box 3 and moves upward, while the heavier brick material on the aggregate adheres to the inner wall of the cone-shaped sorting box 3 and moves to settle, so that the aggregate filtered and collected on the cone-shaped sorting box 3 is stratified inside the cone-shaped sorting box 3 under the action of centrifugal force. , and in the process of stratification, because aggregates with similar particle sizes are filtered inside the conical sorting box 3, the resistance generated between the bricks and concrete materials on the aggregates when they are sinking and rising respectively is relatively small, thereby ensuring the efficiency of stratified screening of aggregates inside the conical sorting box 3. After the bricks and concrete materials on the aggregates are stratified by rotating the conical sorting box 3, the lifting component 11 drives the respective annular screening frames 1001 outside the conical sorting box 3 to move upward, so that the respective annular screening frames 1001 are connected to the respective discharge troughs 1003 on the conical sorting box 3. At this time, as the conical sorting box 3 continues to rotate, the stratified aggregates are transported outward through the annular screening frames 1001 and the conveying pipe 1005 by the action of centrifugal force and collected, thereby completing the screening and collection of recycled concrete aggregates;

[0043] During the rotation of the rotating shaft 602, the driving component 14 and the rotation of the fan blades 1302 exhaust the air inside the second chute 1204 and blow it out from the other end of the air pipe 1201. Accompanied by the concrete aggregate to be screened falling from one end of the feed pipe 102 and the blowing action of one end of the air pipe 1201, the dust and recycled fine aggregate on the concrete aggregate to be screened are separated from the recycled concrete and flow to the second chamber and pass between the first chute 1202 and the second chute 1204. During the passing process, the recycled fine aggregate is filtered and collected by the filter plate 1206 on the first recovery frame 1203, and then the dust is collected by the filter plate 1206 on the second recovery frame 1205, so as to facilitate dust reduction and recycling of recycled fine aggregate during the concrete aggregate screening process.

Claims

1. A recycled concrete aggregate screening device, comprising a processing box (101) and a feed pipe (102) mounted on the processing box (101), characterized in that: A partition (2) is fixed inside the processing box (101), and the processing box (101) forms a first chamber and a second chamber under the dividing effect of the partition (2), the first chamber and the second chamber are communicated, one end of the feed pipe (102) is located inside the first chamber, and a plurality of conical sorting boxes (3) are vertically arranged on the first chamber, a filter (4) is fixed at the bottom of the conical sorting box (3), and the aperture of the filter (4) on each conical sorting box (3) is arranged to decrease from top to bottom, and the conical sorting box (3) is arranged to decrease from top to bottom. A plurality of connecting plates (5) are fixed to the side wall at the lower end of the conical sorting box (3), and the upper and lower conical sorting boxes (3) are connected in an integrated manner under the action of each connecting plate (5); a rotating assembly (6) for rotating the conical sorting box (3) is provided at the lower end of the processing box (101); each of the conical sorting boxes (3) is provided with a screening and discharging assembly (10) for screening and discharging materials after sorting; and a recycling assembly (12) for recycling recycled fine aggregate in the recycled concrete feeding process is provided on the first chamber; The rotating assembly (6) includes an L-shaped plate (601) fixed to the lower end of the processing box (101), a rotating shaft (602) is rotatably connected to the L-shaped plate (601), and a mounting shaft (603) is rotatably connected to the processing box (101), one end of the mounting shaft (603) is located inside the first chamber and is fixed to the lowest conical sorting box (3), the rotating shaft (602) and the mounting shaft (603) are concentrically arranged and connected via a transmission assembly (7), a driving motor (604) for driving the rotating shaft (602) is installed on the L-shaped plate (601), and a vibration assembly (8) is provided on the mounting shaft (603) for facilitating efficient conveying and filtering of recycled concrete from the conical sorting box (3); The vibration assembly (8) comprises a strip plate (801), a fixing pin (802) being fixed to the upper end of the strip plate (801), an annular plate (803) being fixed to the side wall of the mounting shaft (603), the annular plate (803) being located above the strip plate (801), and a plurality of protrusions (804) for pushing against the fixing pin (802) being fixed in an annular array at the lower end of the annular plate (803), and a contraction assembly (9) for contracting the strip plate (801) being provided at the lower end of the processing box (101); The shrinkage assembly (9) includes a fixed frame (901) fixed to the lower end of the processing box (101), and a plurality of first T-shaped rods (902) are slidably connected to the fixed frame (901), one end of each first T-shaped rod (902) is fixed to the strip plate (801), and a first mounting plate (903) is fixed to the upper end of the strip plate (801), and a first iron block (904) and a first electromagnet (905) are respectively installed on the side of the first mounting plate (903) opposite to the fixed frame (901), and a first spring (906) is sleeved on the side wall of each first T-shaped rod (902).

2. The aggregate screening device for recycled concrete according to claim 1, characterized in that: The transmission assembly (7) comprises a plurality of spline grooves (701) formed at one end of a rotating shaft (602), each of the spline grooves (701) being slidably connected to a spline pin (702), and one end of each of the spline pins (702) being fixed to one end of a mounting shaft (603).

3. The aggregate screening device for recycled concrete according to claim 2, characterized in that: The screening and discharging assembly (10) comprises a plurality of annular screening frames (1001) sleeved on the outside of the conical sorting box (3), an annular baffle (1002) being fixed on the side of each annular screening frame (1001) facing the conical sorting box (3), a plurality of discharge troughs (1003) being provided on the conical sorting box (3), and each discharge trough (1003) being blocked by the counteracting action of each annular baffle (1002), a mounting frame (1004) being fixed on the first chamber, and a plurality of conveying pipes (1005) being installed on the mounting frame (1004) ), one end of each of the conveying pipes (1005) is respectively connected to each of the annular screening frames (1001), a lifting assembly (11) for lifting the annular screening frames (1001) is installed on the mounting frame (1004), and two adjacent annular screening frames (1001) are connected by a plurality of connecting blocks so that each of the annular screening frames (1001) can be lifted and lowered synchronously, and a rubber pad is provided on the side of the annular screening frame (1001) that abuts against the conical sorting box (3) to facilitate the annular screening frame (1001) to maintain abutment against the conical sorting box (3) during the lifting process.

4. The aggregate screening device for recycled concrete according to claim 3, characterized in that: The lifting assembly (11) comprises a second mounting plate (1101) fixed to one side of the mounting frame (1004); a plurality of second T-shaped rods (1102) are slidably connected to the second mounting plate (1101); one end of each second T-shaped rod (1102) is fixed to the uppermost annular screening frame (1001) on the outer side of the conical sorting box (3); a second spring (1103) is sleeved on the side wall of each second T-shaped rod (1102); and a second electromagnet (1104) and a second iron block (1105) are respectively fixed between the second mounting plate (1101) and the annular screening frame (1001).

5. The aggregate screening device for recycled concrete according to claim 4, characterized in that: The recovery component (12) includes an air pipe (1201) installed on the first chamber, one end of the air pipe (1201) is located below the feed pipe (102), and the processing box (101) is provided with a first chute (1202) and a second chute (1204), the first chute (1202) is located above the second chute (1204), and the first chute (1202) and the second chute (1204) are connected to the interior of the second chamber. One end of the air pipe (1201) is communicated with the interior of the second slide groove (1204); a first recovery frame (1203) and a second recovery frame (1205) are slidably connected to the first slide groove (1202) and the second slide groove (1204), respectively; a filter plate (1206) for filtering is installed on the first recovery frame (1203) and the second recovery frame (1205); and an air blowing component (13) for blowing is provided on the air pipe (1201).

6. The aggregate screening device for recycled concrete according to claim 5, characterized in that: The blowing assembly (13) comprises a support frame fixed inside the air pipe (1201), an operating shaft (1301) being rotatably connected to the support frame, a fan blade (1302) being fixed to one end of the operating shaft (1301), and a driving assembly (14) for driving the operating shaft (1301) being provided on the rotating shaft (602).

7. The aggregate screening device for recycled concrete according to claim 6, characterized in that: The driving assembly (14) comprises a transmission shaft (1401) rotatably connected to the L-shaped plate (601), one end of the transmission shaft (1401) is located inside the trachea (1201) and is fixed with a first bevel gear (1402), one end of the operating shaft (1301) is fixed with a second bevel gear (1403), the first bevel gear (1402) and the second bevel gear (1403) are meshed with each other, a third bevel gear (1404) is fixed on the rotating shaft (602), and one end of the transmission shaft (1401) is fixed with a fourth bevel gear (1405), the third bevel gear (1404) and the fourth bevel gear (1405) are meshed with each other.

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