Road construction waste sorting and screening device and method

Abstract

This invention relates to the field of waste sorting and screening technology. This invention application discloses a road construction waste sorting and screening device, which mainly aims to solve the technical problems of existing automated sorting and screening devices for demolition waste in road construction having relatively complex structures, high support costs, and high operating and maintenance costs. This invention improves the structure of the drive unit to achieve the function of simultaneously driving the crushing unit and the traction unit to crush and traction reinforced concrete, which can better meet the sorting needs of steel bars and alloy components. It also optimizes the structure of the entire device, reduces the energy consumption and maintenance difficulty of the device, and can better meet the needs of users.

Description

Technical Field

[0001] This invention relates to the field of waste sorting and screening technology, specifically to a device and method for sorting and screening construction waste from road construction. Background Technology

[0002] Construction waste generated during municipal road construction generally refers to the waste produced by construction units during the construction, laying, demolition, or repair of various buildings, structures, and pipelines. It mainly includes concrete waste or reinforced concrete waste. Currently, in the market, construction waste is screened for recyclable metals to avoid wasting metal resources and save construction costs.

[0003] To address the aforementioned issues, a patent for a municipal road construction waste sorting and screening device and method has been disclosed by those skilled in the art, with publication number CN114832894A. This patent utilizes the output of a first motor to drive a first conveyor shaft to rotate, which in turn drives a conveyor belt to rotate, moving the municipal road construction waste placed on the conveyor belt. A hydraulic rod then drives a sliding block to move along a sliding groove within a second housing. The sliding block drives a moving rod along a movable groove within the second housing, which in turn drives a first scraper to move, allowing the first scraper to remove debris from the filter screen and effectively prevent clogging. Simultaneously, the sliding block moves a magnet, adsorbing metal from the crushed municipal road construction waste onto its surface, facilitating the screening of the waste. When the magnet contacts the second scraper, the second scraper scrapes off the metal adsorbed on the magnet's surface, thus achieving the purpose of sorting the construction waste.

[0004] However, the above-mentioned patent has the following drawbacks in actual use: First, the screening device can play a good role in screening metals with small volume or weight, but it cannot achieve the same sorting effect when sorting steel bars or alloy rods in reinforced concrete. This is because the steel bars are long and heavy, and when the device is vibrating, simply using magnets to attract them cannot guarantee that the steel bars can move smoothly with the magnets. Moreover, the wet concrete attached to the steel bars will affect the attraction effect of the magnets to a certain extent, and alloy materials cannot be attracted by the magnets. Second, the above-mentioned screening device requires the use of multiple motors and transmission structures, and the overall structure of the device is relatively complex. In actual use, it has high energy consumption and is difficult to maintain, which cannot meet the increasingly high usage needs of enterprises. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned problems, and to disclose a road construction waste sorting and screening device and screening method.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: In a first aspect, the present invention provides a road construction waste sorting and screening device, comprising a shell and a waste collection box. The bottom surface of the shell has several through holes communicating with the inner cavity of the shell. Support legs are installed at the four corners of the bottom surface of the shell. A feeding port is provided on the top surface of the shell, and a hopper is installed at the feeding port. A discharge channel is provided on the left side of the shell, one end of which communicates with the inner cavity of the shell, and a guide groove is installed at the opening of the other end of the discharge channel. The waste collection box can be placed below the shell. A partition is provided inside the shell, and one end of the partition is connected to the outer shell. The right side of the inner cavity of the shell is connected, and the other end of the partition is connected to the lower edge of the opening at the other end of the discharge channel. One end of the partition is higher than the other end of the partition. A crushing unit is provided below the partition. The partition has several elongated holes. The crushing unit can protrude through the elongated holes to the upper surface of the partition and crush the reinforced concrete material on the upper surface of the partition. A traction unit is installed in the discharge channel. A drive unit is installed on the right side of the shell. The drive unit is connected to the crushing unit and the traction unit respectively. The drive unit can drive the crushing unit and the traction unit to move simultaneously.

[0007] As a further technical solution, the drive unit includes a motor and a drive shaft. The motor shaft is connected to one end of the drive shaft via a coupling. Two drive gears are mounted on the drive shaft. The other end of the drive shaft extends out of the rear surface of the housing. A drive wheel is mounted on the other end of the drive shaft. The drive wheel is connected to the traction unit via a drive belt. Both drive gears are connected to the crushing unit.

[0008] As a further technical solution, the crushing unit includes two rotating rollers, both located below the partition. The first end of each rotating roller passes through the right side of the inner cavity of the outer casing and extends to the right side of the outer casing. The second end of each rotating roller is movably connected to the left side of the inner cavity of the outer casing. A driven gear is installed on the first end of each rotating roller, and two driving gears are located between the two driven gears. The two driven gears and the two driving gears are in a one-to-one correspondence. Each driven gear meshes with its corresponding driving gear. A plurality of crushing wheels are installed at equal intervals on the rotating rollers. The plurality of crushing wheels are in a one-to-one correspondence with the elongated holes on one side of the center line of the partition. The diameter of the plurality of crushing wheels decreases progressively from one end of the rotating roller to the other end, ensuring that the upper edges of the plurality of crushing wheels can pass through the corresponding elongated holes and protrude from the upper surface of the partition.

[0009] As a further technical solution, the two driving gears rotate counterclockwise following the transmission shaft, and both driving gears can actuate the driven gears they mesh with, ensuring that the rotation directions of the two driven gears are opposite.

[0010] As a further technical solution, both of the driving gears push down the driven gears that mesh with them, causing the two rotating rollers to rotate with several crushing wheels in the direction of the center line of the partition. The edges of the crushing wheels are provided with several crushing teeth.

[0011] As a further technical solution, the concrete fragments crushed by the crushing teeth can fall through the gap between the crushing wheel and the edge of the elongated hole onto the bottom surface of the inner cavity of the outer shell and then fall into the fragment collection box through the through hole.

[0012] As a further technical solution, the traction unit includes a notch, a traction roller one, and a traction roller two. The notch is located on the lower surface of the discharge channel. The traction roller one and the traction roller two are installed vertically. One end of the traction roller one and the traction roller two extends out of the front surface of the outer shell, and the other end of the traction roller one and the traction roller two extends out of the rear surface of the outer shell. A driven wheel two is installed on both the traction roller one and the traction roller two. The driven wheel two is connected to the driving wheel through a belt, driving the traction roller one and the traction roller two to rotate relative to each other.

[0013] As a further technical solution, the traction unit also includes an auxiliary wheel, and the driving wheel is connected to the auxiliary wheel and the driven wheel through a transmission belt to form a closed transmission circuit.

[0014] As a further technical solution, the distance between the lower edge of the second traction roller and the upper edge of the first traction roller is matched with the size of the reinforcing bar.

[0015] As a further technical solution, the shape of the partition, the shape of the bottom surface of the discharge channel, and the shape of the base plate are matched.

[0016] Secondly, based on the aforementioned road construction waste sorting and screening device, the present invention also provides a screening method, as follows: Reinforced concrete blocks are fed into the hopper and fall onto the partition through the feeding port. The motor starts, and the drive gear and drive wheel on the drive shaft drive the two crushing rollers, traction roller one and traction roller two to rotate synchronously. Under the action of gravity, the reinforced concrete blocks slide along the inclined partition. During the sliding process, the reinforced concrete blocks continuously pass over the crushing rollers. The crushing teeth on the crushing rollers continuously crush the concrete blocks on the steel bars. The crushed concrete fragments fall through the gap between the crushing rollers and the edge of the elongated hole onto the bottom surface of the inner cavity of the outer shell and fall into the fragment collection box through the through hole one. Under the action of gravity, the steel bars fall along the upper surface of the partition to the outlet of the discharge channel one. Under the rotation of traction roller one, the steel bars enter the gap between traction roller one and traction roller two and fall onto the bottom plate of the guide groove under the combined action of traction roller one and traction roller two. The concrete adhering to the surface of the steel bars is crushed by traction roller one and traction roller two and falls into the fragment collection box through the through hole two. The steel bars on the bottom plate are removed, thus completing the sorting of reinforced concrete.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Driven by a motor, this invention utilizes the drive gear and drive wheel on the transmission shaft to simultaneously drive the crushing unit and the traction unit to crush and traction reinforced concrete, allowing steel bars and alloy rods to be effectively separated from the concrete. This achieves automated sorting of metals with large volume and weight, effectively reducing the energy consumption of the sorting work, while also reducing the failure rate and maintenance difficulty of the device, thus better meeting the needs of enterprises. 2. This device utilizes several crushing wheels arranged in descending order of diameter, along with inclined baffles, to complete the crushing work during the rolling of reinforced concrete. This achieves the effect of automatic conveying and crushing of reinforced concrete, eliminating the need for a drive belt, simplifying the structure of the device, and reducing production costs. Attached Figure Description

[0018] Figure 1 This is a front view of the road construction waste sorting and screening device described in this invention; Figure 2 This is the present invention. Figure 1 A partially enlarged schematic diagram of the drive unit in the road construction waste sorting and screening device shown. Figure 3 This is the present invention. Figure 1 The diagram shows a cross-sectional view of the road construction waste sorting and screening device (the arrows in the diagram indicate the rotation direction of the drive shaft). Figure 4 This is the present invention. Figure 3 A partially enlarged schematic diagram of the discharge channel section in the road construction waste sorting and screening device shown. Figure 5 This is the present invention. Figure 3 The diagram shows a partially enlarged view of the drive unit in the road construction waste sorting and screening device (the arrows in the diagram indicate the rotation direction of the drive shaft). Figure 6 This is a rear view of the road construction waste sorting and screening device described in this invention (the arrows in the figure indicate the rotation directions of the auxiliary wheel, driven wheel one, and driven wheel two, respectively). Figure 7 This is the present invention. Figure 6 The diagram shows a partially enlarged view of the discharge channel section in the road construction waste sorting and screening device (the arrows in the diagram indicate the rotation directions of the auxiliary wheel, driven wheel one, and driven wheel two, respectively). Figure 8 This is a schematic diagram of the drive unit described in this invention on the right side of the housing (the arrows in the diagram indicate the rotation directions of the two driven wheels respectively). Figure 9 This is a schematic diagram of the structure of the partition described in this invention; Figure 10 This is a schematic diagram of the structure of the drive gear described in this invention; Figure 11 This is a schematic diagram of the driven gear described in this invention; In the diagram: 1. Outer shell; 2. Crusher collection box; 3. Support leg one; 4. Hopper; 5. Guide groove; 6. Partition plate; 7. Elongated hole; 8. Drive belt; 9. Bracket; 10. Motor; 11. Drive shaft; 12. Drive gear; 13. Drive wheel; 14. Rotating roller; 15. Driven gear; 16. Crushing wheel; 17. Notch; 18. Traction roller one; 19. Traction roller two; 20. Driven wheel one; 21. Driven wheel two; 22. Auxiliary wheel. Detailed Implementation

[0019] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. For ease of description, the words "up," "down," "left," and "right" appearing in this invention only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, the present invention proposes a road construction waste sorting and screening device.

[0023] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figures 1-11 As shown; the road construction waste sorting and screening device provided in this embodiment includes a shell 1 and a waste collection box 2. The bottom surface of the shell 1 has several through holes communicating with the inner cavity of the shell 1. The top surface of the shell has a feeding port with a hopper 4 installed thereon. The left side of the shell has a discharge channel, one end of which communicates with the inner cavity of the shell, and the other end of which has a guide groove 5 installed at its opening. The waste collection box can be placed below the shell. A partition 6 is provided inside the shell 1, with the first end of the partition 6 connected to the right side of the inner cavity of the shell. Next, the second end of the partition 6 is connected to the lower edge of the opening at the other end of the discharge channel. The first end of the partition 6 is higher than the second end of the partition. A crushing unit is provided below the partition 6. The partition 6 has several elongated holes. The crushing unit can protrude through the elongated holes to the upper surface of the partition and crush the reinforced concrete material on the upper surface of the partition. A traction unit is installed in the discharge channel. A drive unit is installed on the right side of the outer shell 1. The drive unit is connected to the crushing unit and the traction unit respectively. The drive unit can drive the crushing unit and the traction unit to move simultaneously.

[0024] Driven by a motor, this invention utilizes the drive gear and drive wheel on the transmission shaft to simultaneously drive the crushing unit and the traction unit to crush and traction reinforced concrete, allowing steel bars and alloy rods to be effectively separated from the concrete. This achieves automated sorting of large-volume and heavy metals, effectively reducing energy consumption in the sorting process, while also lowering the failure rate and maintenance difficulty of the device, thus better meeting the needs of enterprises.

[0025] The specific structure of each part is as follows: like Figure 1 As shown, the outer shell 1 is a right-angled trapezoidal box. The top and bottom surfaces of the outer shell 1 are both flat. Several through holes are provided on the bottom surface of the outer shell 1, which communicate with the inner cavity of the outer shell 1. The front surface, rear surface, and right side surface of the outer shell 1 are high vertical surfaces. The upper edges of the three high vertical surfaces are connected to the three sides of the top surface, and the lower edges of the three high vertical surfaces are connected to the three sides of the bottom surface. The right side surface of the outer shell 1 has a door that can be opened to facilitate cleaning of the bottom surface of the inner cavity of the outer shell 1. The left side surface of the outer shell 1 includes two parts: a sloping surface and a low vertical surface. The sloping surface is located above the low vertical surface. The upper edge of the sloping surface is connected to the last edge of the top surface, and the lower edge of the sloping surface is connected to the upper edge of the low vertical surface. The lower edge of the low vertical surface is connected to the last edge of the bottom surface. Support legs 3 are installed at the four corners of the bottom surface of the outer shell 1. The top surface of the outer shell 1 has a feeding port for feeding reinforced concrete materials. A hopper 4 is installed at the feeding port.

[0026] Furthermore, such as Figure 1 , Figure 3 As shown, a discharge channel is provided on the short vertical surface of the outer shell 1. One end of the discharge channel is connected to the inner cavity of the outer shell 1 through the short vertical surface. The discharge channel is a rectangular channel. A guide groove 5 is installed at the opening of the other end of the discharge channel. The guide groove 5 is a long groove with a "U"-shaped cross-section, which is spliced ​​from two side plates and a bottom plate. The bottom plate and the two side plates are long strip plates with the same length. The length direction of the two side plates is consistent with the length direction of the bottom plate. The two side plates are parallel to each other and perpendicular to the bottom plate. The lower edges of the two side plates are respectively perpendicular to the bottom plate. The two sides of the base plate are connected. The size of one end of the guide groove 5 matches the size of the discharge channel. One side of the base plate is connected to the bottom edge of the discharge channel. The base plate is provided with several through holes 2, which connect the upper and lower surfaces of the base plate. One side of each of the two side plates is connected to the two sides of the discharge channel. The guide groove is used to receive the material discharged from the discharge channel. The crushed material collection box 2 is a rectangular box with an opening at the top. The size of the crushed material collection box 2 matches the size of the bottom surface of the outer shell 1 and ensures that the crushed material collection box 2 can be placed under the outer shell 1.

[0027] Furthermore, such as Figure 3As shown, a partition 6 is provided inside the outer casing 1, and the partition 6 is inclined. The first end of the partition 6 is connected to the right side of the inner cavity of the outer casing 1. The first end of the partition 6 is close to the feeding port and can receive the reinforced concrete material fed into the feeding port. The second end of the partition 6 is connected to the lower edge of the opening at the other end of the discharge channel. The first end of the partition 6 is higher than the second end of the partition 6. The center line of the partition 6 points from the first end of the partition 6 to the second end of the partition 6. A crushing unit is provided below the partition 6. Several elongated holes 7 are provided on the partition 6 (see details). Figure 9 The elongated holes 7 are elongated in shape, and several elongated holes 7 are symmetrically distributed on both sides of the center line of the partition 6 (in this embodiment, six elongated holes 7 are provided on each side). The length direction of the elongated holes 7 is perpendicular to the length direction of the center line of the partition 6. The crushing unit can protrude to the upper surface of the partition 6 through the elongated holes 7 and crush the reinforced concrete material on the upper surface of the partition 6. A traction unit is installed in the discharge channel. The traction unit opens near the other end of the discharge channel. The traction unit can pull the steel bars at the second end of the partition 6 into the guide groove 5. A drive unit is installed on the right side of the outer shell 1. The drive unit is connected to the crushing unit and the traction unit respectively. The drive unit can drive the crushing unit and the traction unit to move simultaneously.

[0028] It should be noted that, further, such as Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the aforementioned drive unit includes a bracket 9 mounted on the right side of the housing 1. A motor 10 and a drive shaft 11 are mounted on the bracket 9. The length direction of the drive shaft 11 is parallel to the right side and bottom surface of the housing 1. The motor 10 is located near the front surface of the housing 1. The shaft of the motor 10 is connected to one end of the drive shaft 11 via a coupling. Two drive gears 12 (see [reference needed] for details) are mounted on the drive shaft 11. Figure 10 The planes on which the two drive gears 12 are located are perpendicular to the right side of the outer casing 1. The other end of the drive shaft 11 extends out of the rear surface of the outer casing 1. The drive wheel 13 is installed on the other end of the drive shaft 11. The motor 10 can drive the drive shaft 11 to rotate synchronously with the drive wheel 13 and the two drive gears 12. The drive wheel 13 is connected to the traction unit through the transmission belt 8 and carries the traction unit to perform traction action. Both drive gears are connected to the crushing unit and drive the crushing unit to crush the reinforced concrete material on the upper surface of the partition 6 by rotation.

[0029] It should be noted that, further, the aforementioned crushing unit includes two rotating rollers 14, which are parallel to each other in their length direction. Both rotating rollers 14 are located below the partition 6 and are parallel to the bottom surface of the inner cavity of the outer shell 1. The two rotating rollers 14 are located on both sides of the center line of the partition 6. One end of the rotating roller 14 passes through the right side of the inner cavity of the outer shell 1 and extends to the right side of the outer shell 1. The other end of the rotating roller 14 is movably connected to the left side of the inner cavity of the outer shell 1, allowing the rotating roller 14 to rotate within the outer shell 1. A driven gear 15 (see [link to driven gear 15]) is installed on one end of the rotating roller 14. Figure 11 The driven gear 15 is parallel to the right side of the outer casing 1. Two driving gears 12 are located between the two driven gears 15, and the two driven gears 15 and the two driving gears 12 are in a one-to-one correspondence. The driven gears 15 mesh with their corresponding driving gears 12. Several crushing wheels 16 are installed at equal intervals on the rotating roller 14. The crushing wheels 16 are in a one-to-one correspondence with the elongated holes 7 on one side of the center line of the partition plate 6. The crushing wheels 16 are arranged at equal intervals along the length of the rotating roller 14. The diameter of the crushing wheels 16 decreases gradually from one end of the rotating roller 14 to the other end, ensuring that the upper edge of each crushing wheel 16 can pass through the corresponding elongated hole 7 and protrude from the upper surface of the partition plate 6. This device uses a series of crushing wheels with decreasing diameters in conjunction with an inclined partition to complete the crushing work during the rolling of reinforced concrete, thereby achieving the effect of automatic conveying and crushing of reinforced concrete. It eliminates the need for a drive belt, simplifies the structure of the device, and reduces manufacturing costs.

[0030] Two drive gears 12 rotate counterclockwise following the drive shaft 11. Both drive gears 12 can drive the driven gears 15 they mesh with, ensuring that the two driven gears 15 rotate in opposite directions. That is, when one driven gear 15 rotates counterclockwise, the other driven gear 15 rotates clockwise. Both drive gears 12 drive the driven gears 15 they mesh with downwards, causing the two rotating rollers 14 to rotate with several crushing wheels 16 in the direction of the center line of the partition 6. Several crushing teeth are provided on the edge of the crushing wheel 16. The crushing teeth are arranged at equal distances along the edge of the crushing wheel 16. The crushing teeth are pyramidal in shape, and the tips of the crushing teeth point to the outside of the crushing wheel 16. The concrete fragments crushed by the crushing teeth can fall through the gap between the crushing wheel 16 and the edge of the elongated hole 7 onto the bottom surface of the inner cavity of the outer shell 1 and fall into the fragment collection box 2 through the through hole 1. The size of the several elongated holes 7 is the same, and the size of the several elongated holes 7 matches the size of the crushing wheel 16 with the largest diameter.

[0031] It should be noted that the traction unit includes a notch 17, a first traction roller 18, and a second traction roller 19. The notch 17 is located on the lower surface of the discharge channel. The notch 17 is L-shaped, with its vertical surface connecting to the lower surface of the discharge channel and its horizontal surface connecting to one end face of the discharge channel. The connecting edge between the horizontal surface of the notch 17 and one end face of the discharge channel forms the bottom edge of the discharge channel. The dimensions of the notch 17 match the dimensions of the first traction roller 18. The first traction roller 18 is embedded in the notch 17 and can rotate within it. Traction roller 18 is close to the vertical surface of notch 17, with its upper edge protruding from the bottom surface of the discharge channel. One end of traction roller 18 extends beyond the front surface of housing 1, and the other end extends beyond the rear surface of housing 1. Driven wheel 20 is mounted on the other end of traction roller 18. Traction roller 29 is mounted on the top surface of the discharge channel, with its lower edge close to the upper edge of traction roller 18. One end of traction roller 29 extends beyond the front surface of housing 1, and the other end extends beyond the rear surface of housing 1. On the rear surface of the outer casing 1, a driven wheel 21 is installed on the other end of the traction roller. An auxiliary wheel 22 is installed on the rear surface of the outer casing 1, located above the driven wheel 21. The transmission belt 8 starts from the lower edge of the driving wheel 13, passes the rear edge of the driven wheel 21, then goes around the front edge of the driven wheel 10, passes the rear edge of the auxiliary wheel 22, reaches the lower edge of the auxiliary wheel 22, and then passes the lower edge of the auxiliary wheel 22, passes the upper edge of the driving wheel 13, and returns to the lower edge of the driving wheel 13, forming a closed transmission circuit. 3. The front edge of driven wheel 1 20, driven wheel 21 and auxiliary wheel 22 is near the right side of the outer shell 1, and the rear edge of driven wheel 13, driven wheel 1 20, driven wheel 21 and auxiliary wheel 22 is near the left side of the outer shell 1. When driven wheel 13 rotates counterclockwise, it can drive traction roller 18 and traction roller 2 19 to rotate relative to each other through driven wheel 1 20 and driven wheel 21. During the relative rotation, traction roller 18 and traction roller 2 19 pull the steel bar from the partition 6 to the floor of the guide groove 5.

[0032] The distance between the lower edge of the second traction roller 19 and the upper edge of the first traction roller 18 matches the size of the reinforcing bar. When the first traction roller 18 and the second traction roller 19 pull the reinforcing bar, the first traction roller 18 and the second traction roller 19 can squeeze the small concrete blocks attached to the reinforcing bar into fragments. Under the action of gravity, the concrete fragments roll down through the vertical and horizontal surfaces of the notch 17 onto the bottom plate of the guide groove 5 and fall into the fragment collection box 2 through the through hole 2 on the bottom plate.

[0033] In the implementation of the technical solution of the present invention, the shape of the partition 6, the shape of the bottom surface of the discharge channel and the shape of the base plate are matched. Both the partition 6 and the base plate are flat plates, and the bottom surface of the discharge channel is flat; or both the partition 6 and the base plate are curved plates, and the bottom surface of the discharge channel is curved. The curvature of the partition 6, the curvature of the bottom surface of the discharge channel and the curvature of the base plate are matched. In addition, two support legs are installed on the other side of the base plate. The two support legs support the ground. The height of the support legs matches the height of the scrap collection box 2 and ensures that one end of the scrap collection box 2 can pass through the bottom of the base plate.

[0034] The electronic components used in this technical solution are all existing products, and the technical solution of this invention does not have any special requirements or changes to the structure of the above-mentioned electronic components; During the implementation of this technical solution, those skilled in the art need to connect all electrical components and their compatible power supplies via wires, and should select a suitable controller according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle of this technical solution and the sequential operation order of each electrical component; the detailed connection methods are well-known in the art. This technical solution mainly introduces the working principle and process, and will not further explain electrical control.

[0035] The above-mentioned road construction waste sorting and screening device uses the following method for sorting and screening construction waste: During implementation, Workers put reinforced concrete blocks into hopper 4. The reinforced concrete blocks fall onto partition 6 through the feeding port. At this time, motor 10 starts, and the drive gear 12 and drive wheel 13 on drive shaft 11 drive two crushing rollers, traction roller 18 and traction roller 2 19 to rotate synchronously. Under the action of gravity, the reinforced concrete blocks slide along the inclined partition 6. During the sliding process, the reinforced concrete blocks continuously pass through crushing wheel 16. The crushing teeth on crushing wheel 16 continuously crush the concrete blocks on the steel bars. The crushed concrete fragments fall through the gap between crushing wheel 16 and the edge of long hole 7 onto the bottom surface of the inner cavity of outer shell 1 and fall into fragment collection box 2 through through hole 1. Since the reinforcing bars cannot pass through the gaps, they fall along the upper surface of the partition 6 under the action of gravity to the outlet of the discharge channel. The reinforcing bars are pulled by the rotation of the first traction roller 18 into the gap between the first traction roller 18 and the second traction roller 19, and fall onto the bottom plate of the guide groove 5 under the combined action of the first traction roller 18 and the second traction roller 19. The concrete adhering to the surface of the reinforcing bars is crushed by the first traction roller 18 and the second traction roller 19 and falls into the crushed material collection box 2 through the second through hole. The workers remove the reinforcing bars from the bottom plate, thus completing the sorting of reinforced concrete.

[0036] The above technical solutions only embody the preferred technical solutions of the present invention. Any modifications that may be made by those skilled in the art to certain parts thereof embody the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A road construction waste sorting and screening device, comprising a shell and a waste collection box, wherein the bottom surface of the shell has several through holes communicating with the inner cavity of the shell, the top surface of the shell has a feeding port with a hopper installed thereon, the left side of the shell has a discharge channel, one end of the discharge channel communicating with the inner cavity of the shell, and the other end of the discharge channel having a guide groove installed at its opening, and the waste collection box being able to be placed below the shell, characterized in that... The outer shell is equipped with a partition. The first end of the partition is connected to the right side of the inner cavity of the outer shell, and the second end of the partition is connected to the lower edge of the opening at the other end of the discharge channel. The first end of the partition is higher than the second end of the partition. A crushing unit is provided below the partition. The partition has several elongated holes. The crushing unit can protrude through the elongated holes to the upper surface of the partition and crush the reinforced concrete material on the upper surface of the partition. A traction unit is installed in the discharge channel. A drive unit is installed on the right side of the outer shell. The drive unit is connected to the crushing unit and the traction unit respectively. The drive unit can drive the crushing unit and the traction unit to operate simultaneously. The traction unit includes a notch, a first traction roller, and a second traction roller. The notch is located on the lower surface of the discharge channel. The first traction roller and the second traction roller are installed vertically. One end of the first traction roller and the second traction roller extends out of the front surface of the outer shell, and the other end of the first traction roller and the second traction roller extends out of the rear surface of the outer shell. A driven wheel is installed on both the first traction roller and the second traction roller. The driven wheel is connected to the driving wheel through a belt, driving the first traction roller and the second traction roller to rotate relative to each other. Under the action of gravity, the steel bars will fall along the upper surface of the partition to the discharge channel. The steel bars will enter the gap between traction roller 1 and traction roller 2 under the rotation of traction roller 1 and traction roller 2 and fall onto the bottom plate of the guide groove under the combined action of traction roller 1 and traction roller 2. The concrete attached to the surface of the steel bars will be crushed by traction roller 1 and traction roller 2 and fall into the crushed material collection box through the through hole 2. The crushing unit includes two rotating rollers. Both driving gears push down the driven gears they mesh with, causing the two rotating rollers to rotate with several crushing wheels in the direction of the center line of the partition. The edges of the crushing wheels are provided with several crushing teeth. The notch is L-shaped. The vertical surface of the notch connects to the lower surface of the discharge channel, and the horizontal surface of the notch connects to one end face of the discharge channel. The connecting edge between the horizontal surface of the notch and one end face of the discharge channel is the bottom edge of the discharge channel. The size of the notch matches the size of the first traction roller. The first traction roller is embedded in the notch and can rotate inside the notch. The first traction roller is close to the vertical surface of the notch, and the upper edge of the first traction roller protrudes from the bottom surface of the discharge channel.

2. The road construction waste sorting and screening device according to claim 1, characterized in that, The drive unit includes a motor and a drive shaft. The motor shaft is connected to one end of the drive shaft via a coupling. Two drive gears are mounted on the drive shaft. The other end of the drive shaft extends out of the rear surface of the housing. A drive wheel is mounted on the other end of the drive shaft. The drive wheel is connected to the traction unit via a drive belt. Both drive gears are connected to the crushing unit.

3. The road construction waste sorting and screening device according to claim 2, characterized in that, Both rotating rollers are located below the partition. The first end of each rotating roller passes through the right side of the inner cavity of the outer shell and extends to the right side of the outer shell. The second end of each rotating roller is movably connected to the left side of the inner cavity of the outer shell. A driven gear is installed on the first end of each rotating roller. Two driving gears are located between the two driven gears. The two driven gears and the two driving gears are in a one-to-one correspondence. The driven gears mesh with their corresponding driving gears. A plurality of crushing wheels are installed at equal intervals on the rotating rollers. The plurality of crushing wheels are in a one-to-one correspondence with the elongated holes on one side of the center line of the partition. The diameter of the plurality of crushing wheels decreases progressively from one end of the rotating roller to the other end, ensuring that the upper edges of the plurality of crushing wheels can pass through the corresponding elongated holes and protrude from the upper surface of the partition.

4. The road construction waste sorting and screening device according to claim 3, characterized in that, The two drive gears rotate counterclockwise following the drive shaft, and both drive gears can actuate the driven gears they mesh with, ensuring that the two driven gears rotate in opposite directions.

5. The road construction waste sorting and screening device according to claim 1, characterized in that, The concrete fragments broken by the crushing teeth can fall through the gap between the crushing wheel and the edge of the elongated hole onto the bottom surface of the inner cavity of the outer shell, and then fall into the fragment collection box through the through hole.

6. The road construction waste sorting and screening device according to claim 1, characterized in that, It also includes an auxiliary wheel, and the driving wheel is connected to the auxiliary wheel and the driven wheel via a transmission belt to form a closed transmission circuit.

7. The road construction waste sorting and screening device according to claim 1, characterized in that, The distance between the lower edge of the second traction roller and the upper edge of the first traction roller matches the size of the reinforcing bar.

8. The screening method of the road construction waste sorting and screening device according to any one of claims 1-7, characterized in that, Reinforced concrete blocks are fed into the hopper and fall onto the partition plate through the feeding port. The motor starts, and the drive gear and drive wheel on the drive shaft drive the two crushing rollers, traction roller one and traction roller two to rotate synchronously. Under the action of gravity, the reinforced concrete blocks slide along the inclined partition plate. During the sliding process, the reinforced concrete blocks continuously pass over the crushing rollers. The crushing teeth on the crushing rollers continuously crush the concrete blocks on the steel bars. The crushed concrete fragments fall through the gap between the crushing rollers and the edge of the long hole onto the bottom surface of the inner cavity of the outer shell and fall into the fragment collection box through the through hole one. The steel bars on the bottom plate are then removed, thus completing the sorting of the reinforced concrete.

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