Anti-blocking recycled concrete screening device

Abstract

The utility model relates to the technical field of concrete screening, and discloses an anti-clogging recycled concrete screening device which comprises a shell and a spiral conveyor, a feeding bin is arranged on the shell, a crushing device is arranged in the feeding bin, a feeding port and a discharging port are formed in the spiral conveyor, and the feeding port is communicated with the discharging port. A feeding bin is arranged in the shell, a discharging opening is formed in the feeding bin and matched with the feeding bin, a primary screening plate, a fine screening plate and a receiving plate are sequentially and rotationally installed in the shell from top to bottom, a guiding inclined plate is fixedly installed on the shell, a waste receiving opening is formed in the spiral conveyor and matched with the guiding inclined plate, and a waste discharging opening is formed in the shell and matched with the waste receiving opening. And a material receiving mechanism is arranged at the position, corresponding to the fine sieve plate and the receiving plate, of the shell, and a jacking mechanism and a driving mechanism are arranged in the shell. According to the utility model, unqualified particles are automatically reprocessed, a single driving source drives a plurality of jacking mechanisms to realize anti-blocking screening, and an intelligent temporary storage box is designed, so that the material processing efficiency and the resource utilization rate are obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of concrete screening technology, specifically to a clogging-proof recycled concrete screening device. Background Technology

[0002] With the acceleration of global urbanization and the increasing awareness of natural resource protection, recycled concrete is being used more and more widely as a sustainable building material. Recycled concrete is mainly made by recycling waste concrete structures and reusing them after a series of processing processes such as crushing and screening. However, in this process, the screening stage often faces a serious problem - clogging. When processing recycled concrete, traditional screening equipment is prone to clogging of the screen mesh due to the different particle sizes and shapes, especially the presence of a certain amount of fine powder and clay components, which affects screening efficiency and product quality.

[0003] The patent with publication number CN221638773U discloses an anti-clogging recycled concrete screening device, including a screening box. A screening assembly and a cleaning assembly are installed inside the screening box. The screening assembly includes a feed hopper fixedly connected to the top of the screening box. Four mounting slots are provided on the left side of the screening box. Sliding rods are fixedly connected between the top and bottom of each mounting slot. Springs are fixedly connected to the top and bottom of each mounting slot. Slider blocks are fixedly connected between opposite sides of two corresponding springs. A primary screening plate is fixedly connected between the right sides of the two top sliders, and a fine screening plate is fixedly connected between the right sides of the two bottom sliders. Two vibration motors are fixedly installed on the left side of the screening box.

[0004] However, the above-mentioned device has the following problems when in use: the device is particularly poor in handling unqualified particles (i.e., large particles that do not meet the required particle size standard). These large particles often cannot pass through the screen to enter the next processing stage, causing them to either accumulate in the screening device, causing screen blockage and affecting screening efficiency, or require manual intervention to remove and re-crush. This not only increases labor costs, but also reduces the continuity and automation level of the entire process, which is not conducive to the continuous operation of screening activities. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing an anti-clogging recycled concrete screening device, which significantly improves material processing efficiency and resource utilization.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A clog-resistant recycled concrete screening device includes a housing and a screw conveyor. The housing has a feed hopper containing a crushing device. The screw conveyor has a feed inlet and a discharge outlet, the discharge outlet being adapted to the feed hopper. Inside the housing, a primary screening plate, a fine screening plate, and a receiving plate are rotatably mounted sequentially from top to bottom. A guide plate is fixedly installed on the housing. The screw conveyor has a waste collection port adapted to the guide plate. A receiving mechanism is provided on the housing at positions corresponding to the fine screening plate and the receiving plate. A jacking mechanism and a driving mechanism are located inside the housing.

[0008] Preferably, the free ends of the primary screening plate, the fine screening plate, and the receiving plate are all exposed from the housing, and the guide plate is located directly below the free end of the primary screening plate.

[0009] Preferably, the jacking mechanism includes three rotating shafts, and each of the three rotating shafts is fixedly mounted with a jacking column.

[0010] Preferably, the actuating column can make intermittent contact with the corresponding primary sieve plate, fine sieve plate, or receiving plate.

[0011] Preferably, the drive mechanism includes a cylinder and a drive gear. One end of each of the three rotating shafts is fixedly mounted with a drive gear through the housing. The cylinder is mounted on the housing. A mounting plate is fixedly mounted on the output shaft of the cylinder. A drive gear plate is fixedly mounted on the side of the mounting plate opposite to the cylinder. The mounting plate and the drive gear plate are slidably mounted on the housing.

[0012] Preferably, the active gear plate is meshed with all three active gears.

[0013] Preferably, the receiving mechanism includes a temporary storage box, which is fixedly installed on the housing. The temporary storage box is a hollow structure, and the free ends of the fine sieve plate and the receiving plate are located inside the corresponding temporary storage box. A discharge pipe is fixedly installed on the temporary storage box, and a control valve is provided on the discharge pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) This utility model has specially designed an automatic reprocessing mechanism for unqualified particles (i.e. large particles that have not passed the primary screening). Specifically, after the material passes through the primary screening plate, the large particles that fail to pass will slide down the free end of the inclined primary screening plate to the guide plate and further fall into the waste inlet on the screw conveyor. These large particles are then transported back to the feed hopper by the screw conveyor and re-enter the crushing device for crushing. This cycle mechanism ensures that all materials can reach the required particle size standard, avoids the accumulation of large particles in the system, and improves the overall resource recovery rate and processing efficiency.

[0016] (2) This utility model adopts a design scheme of a single driving source driving multiple jacking mechanisms. The cylinder is the main power source. When the cylinder extends and retracts, the active tooth plate moves accordingly and interacts with the three active gears, so that each rotating shaft can rotate synchronously. The jacking column 20 periodically touches the bottom of the primary screen plate 8, the fine screen plate and the receiving plate, generating vibration to promote material separation and prevent screen hole blockage. This design not only reduces the number of driving components and reduces energy consumption, but also ensures the consistency and stability of the vibration frequency of each screen plate, and improves the screening effect.

[0017] (3) This utility model provides a temporary storage space for qualified materials after screening by the fine sieve plate and receiving plate, avoiding material leakage and loss. In addition, a discharge pipe is installed on the temporary storage box, equipped with a control valve, which can manually or automatically adjust the opening to control the speed and timing of material discharge. This not only helps to maintain a stable material flow during continuous production, but also prevents material from flowing out by closing the control valve when the equipment is maintained or the receiving container is replaced, ensuring the safety and flexibility of operation. This design greatly facilitates the collection and subsequent processing of materials, while also reducing the need for manual intervention and improving the automation level of the entire screening process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an anti-clogging recycled concrete screening device proposed in this utility model.

[0019] Figure 2 This is a schematic diagram showing the installation position of the guide inclined plate in an anti-clogging recycled concrete screening device proposed in this utility model.

[0020] Figure 3 This is a schematic diagram showing the installation position of the waste inlet of an anti-clogging recycled concrete screening device proposed in this utility model.

[0021] Figure 4 This is a cross-sectional view of the internal shell of an anti-clogging recycled concrete screening device proposed in this utility model.

[0022] Figure 5 This is a schematic diagram of the jacking mechanism of an anti-clogging recycled concrete screening device proposed in this utility model.

[0023] Figure 6 This is a schematic diagram of the drive mechanism of an anti-clogging recycled concrete screening device proposed in this utility model.

[0024] Figure 7 This is a schematic diagram of the receiving mechanism of an anti-clogging recycled concrete screening device proposed in this utility model.

[0025] In the diagram: 1. Shell; 2. Screw conveyor; 3. Feed inlet; 4. Waste outlet; 5. Feed hopper; 6. Guide inclined plate; 7. Crushing device; 8. Primary screen plate; 9. Temporary storage box; 10. Feed pipe; 11. Feed outlet; 12. Fine screen plate; 13. Receiving plate; 14. Cylinder; 15. Mounting plate; 16. Drive gear plate; 17. Drive gear; 18. Control valve; 19. Rotary shaft; 20. Pushing column. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Please see Figures 1 to 7 A clog-resistant recycled concrete screening device includes a housing 1 and a screw conveyor 2. The screw conveyor 2 can be fixedly installed on the housing 1 or placed through a corresponding frame.

[0028] The shell 1 is provided with a feeding hopper 5, and the inside of the feeding hopper 5 is equipped with a crushing device 7. The crushing device 7 can perform preliminary crushing of large pieces of material so that subsequent screening is more efficient. Since this part is existing technology, it will not be described in detail here.

[0029] The screw conveyor 2 is provided with a loading port 3 and a discharging port 11. The discharging port 11 is adapted to the feeding bin 5. The loading port 3 is located at a lower position, and the discharging port 11 is located at a higher position. Materials can be placed directly into the screw conveyor 2 from the ground through the loading port 3. After that, the materials can be smoothly transferred from the screw conveyor 2 to the feeding bin 5 to realize the loading activity.

[0030] Inside the housing 1, a primary screening plate 8, a fine screening plate 12, and a receiving plate 13 are rotatably installed from top to bottom. The primary screening plate 8, the fine screening plate 12, and the receiving plate 13 are all installed at an angle. The primary screening plate 8, the fine screening plate 12, and the receiving plate 13 are used for grading and screening material particles of different sizes.

[0031] A guide plate 6 is fixedly installed on the shell 1, and a waste inlet 4 is opened on the screw conveyor 2. The waste inlet 4 is adapted to the guide plate 6. Large particles that do not pass through the primary screen plate 8 are discharged by gravity and fall directly onto the guide plate 6. The guide plate 6 is an inclined structure, and the end of the guide plate 6 is directly above the waste inlet 4. Therefore, the large particles that do not pass through the primary screen plate 8 can fall smoothly into the screw conveyor 2. As the screw conveyor 2 starts, the large particles that do not pass through the primary screen plate 8 are crushed and screened again.

[0032] The housing 1 is provided with a receiving mechanism at a position corresponding to the fine screen plate 12 and the receiving plate 13 to facilitate the collection of the screened material. The housing 1 is provided with a jacking mechanism and a driving mechanism, which can prevent clogging under the combined action of the jacking mechanism and the driving mechanism.

[0033] The free ends of the primary screening plate 8, the fine screening plate 12, and the receiving plate 13 all protrude from the housing 1, and the guide inclined plate 6 is located directly below the free end of the primary screening plate 8.

[0034] The primary screening plate 8 is located at the top and is used for preliminary screening of larger particles. Its free end protrudes from the housing 1 to ensure that large particles that fail to pass the primary screening can slide directly out. The guide plate 6 is located directly below the free end of the primary screening plate 8, so that these larger particles can be smoothly guided to the waste inlet 4 to avoid accumulation and blockage inside the device.

[0035] The jacking mechanism includes three rotating shafts 19, and each of the three rotating shafts 19 is fixedly mounted with a jacking column 20.

[0036] The jacking column 20 can make intermittent contact with the corresponding primary screening plate 8, fine screening plate 12 or receiving plate 13.

[0037] When the rotating shaft 19 is rotated, the actuating column 20 will periodically touch the bottom of the screen plate, generating a brief but powerful impact force, causing the screen plate to vibrate, promoting material separation while preventing screen hole blockage.

[0038] The drive mechanism includes a cylinder 14 and a drive gear 17. One end of each of the three rotating shafts 19 passes through the housing 1 and is fixedly mounted with the drive gear 17. The cylinder 14 is mounted on the housing 1. A mounting plate 15 is fixedly mounted on the output shaft of the cylinder 14. A drive gear plate 16 is fixedly mounted on the side of the mounting plate 15 away from the cylinder 14. The mounting plate 15 and the drive gear plate 16 are both slidably mounted on the housing 1.

[0039] The drive gear plate 16 is meshed with all three drive gears 17.

[0040] When the cylinder 14 extends or retracts, it drives the mounting plate 15 and the active gear plate 16 mounted on its output shaft to move back and forth, thereby causing the active gear plate 16 to mesh with the active gear 17 and drive the rotating shaft 19 to rotate. Since the active gear plate 16 is meshed with all three active gears 17, the three rotating shafts 19 can be driven synchronously by one drive source, so that the top column 20 contacts the screen plate in a predetermined pattern, thereby ensuring that the screen plate can vibrate at an appropriate frequency and force, promoting material separation while preventing screen hole blockage.

[0041] The receiving mechanism includes a temporary storage box 9, which is fixedly installed on the housing 1. The temporary storage box 9 is a hollow structure, and the free ends of the fine screen plate 12 and the receiving plate 13 are located inside the corresponding temporary storage box 9. A discharge pipe 10 is fixedly installed on the temporary storage box 9, and a control valve 18 is provided on the discharge pipe 10.

[0042] The temporary storage box 9 is fixedly installed on the housing 1 and is used to temporarily store the material after it has been screened by the fine screen plate 12 and the receiving plate 13. By ensuring that the free ends of the fine screen plate 12 and the receiving plate 13 are inside the temporary storage box 9, the material falling from these two plates can directly enter the temporary storage box 9, thus avoiding material leakage and loss.

[0043] The feed pipe 10 provides a channel for material discharge from the temporary storage box 9. The control valve 18 can be manually or automatically adjusted according to actual needs to control the speed and timing of material discharge. For example, during continuous production, the control valve 18 can be adjusted to maintain a stable material flow; while during equipment maintenance or when replacing the receiving container, the control valve 18 can be closed to prevent material from flowing out.

[0044] Preferably, the control valve 18 can be electrically operated or manually operated, and can be selected according to actual needs. Since it is existing technology, no specific limitation is made here.

[0045] The working process of this utility model is as follows: The recycled concrete blocks after preliminary crushing enter the device through the feeding port 3 of the screw conveyor 2. Since the feeding port 3 is located at a low position, the material can be placed directly on the ground. The screw conveyor 2 transports the material from the low position upwards and sends the material into the feeding hopper 5 of the shell 1 through the discharge port 11 at a higher position.

[0046] After entering the feed hopper 5, large pieces of material are first crushed by the crushing device 7 to reduce the particle size and make the subsequent screening process more efficient.

[0047] After initial crushing, the material falls onto the primary screen plate 8. The primary screen plate 8 is installed at an angle with its free end protruding from the housing 1. Large particles that do not pass through the primary screen will slide down the plate surface to the guide inclined plate 6 and eventually fall into the waste inlet 4, where they will re-enter the screw conveyor 2 for further crushing and screening.

[0048] Smaller particles that pass through the primary sieve plate 8 can fall onto the fine sieve plate 12 for finer screening. The fine sieve plate 12 is also installed at an angle, and the screened finer particles continue to move downwards to the receiving plate 13.

[0049] The material after passing through the fine sieve plate 12 finally falls onto the receiving plate 13, and then slides from the free end of the receiving plate 13 into the corresponding temporary storage box 9.

[0050] The jacking mechanism (including the rotating shaft 19 and the jacking column 20) works together with the drive mechanism (cylinder 14, drive gear 17 and drive toothed plate 16) to make the jacking column 20 periodically touch the bottom of the screen plate, generate vibration, promote material separation and prevent screen hole clogging.

[0051] The discharge pipe 10 on the temporary storage box 9 allows the screened material to be discharged after the control valve 18 is opened. The control valve 18 can be manually or automatically adjusted according to production needs to control the material flow rate and timing.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clogging-preventing recycled concrete screening device, comprising a shell (1) and a screw conveyor (2), a feeding bin (5) is formed on the shell (1), a crushing device (7) is arranged in the feeding bin (5), a feeding opening (3) and a discharging opening (11) are formed on the screw conveyor (2), and the discharging opening (11) is matched with the feeding bin (5), characterized in that, The inside of the shell (1) is sequentially provided with a primary screening plate (8), a fine screening plate (12) and a receiving plate (13) from top to bottom, the shell (1) is fixedly provided with a guide inclined plate (6), the screw conveyor (2) is provided with a waste receiving port (4), the waste receiving port (4) is matched with the guide inclined plate (6), the shell (1) is provided with a material receiving mechanism at a position corresponding to the fine screening plate (12) and the receiving plate (13), and the inside of the shell (1) is provided with a jacking mechanism and a driving mechanism.

2. A clog resistant recycled concrete screening device according to claim 1, wherein, The free ends of the primary screening plate (8), the fine screening plate (12) and the receiving plate (13) are exposed from the shell (1), and the guide inclined plate (6) is located directly below the free end of the primary screening plate (8).

3. A clog resistant recycled concrete screening device as claimed in claim 1, wherein, The jacking mechanism comprises rotating shafts (19), the number of the rotating shafts (19) is three, and the rotating shafts (19) are all fixedly provided with jacking columns (20).

4. A clog resistant recycled concrete screening device according to claim 3, wherein, The jacking column (20) can intermittently contact the corresponding primary screening plate (8), fine screening plate (12) or receiving plate (13).

5. A clog resistant recycled concrete screening device as claimed in claim 3, wherein, The driving mechanism comprises a cylinder (14) and a driving gear (17), one end of each of the three rotating shafts (19) is fixedly provided with the driving gear (17) penetrating through the shell (1), the cylinder (14) is installed on the shell (1), the cylinder (14) is fixedly provided with a mounting plate (15) on an output shaft, the mounting plate (15) is fixedly provided with a driving gear plate (16) on a side away from the cylinder (14), and the mounting plate (15) and the driving gear plate (16) are both slidingly installed on the shell (1).

6. A non-clogging recycled concrete screening device according to claim 5, wherein, The driving gear plate (16) is in meshing relationship with the three driving gears (17).

7. A clog resistant recycled concrete screening device as described in claim 1, wherein, The material receiving mechanism comprises a temporary storage box (9), the temporary storage box (9) is fixedly installed on the shell (1), the temporary storage box (9) is a hollow structure, the free ends of the fine screening plate (12) and the receiving plate (13) are located in the inside of the corresponding temporary storage box (9), the temporary storage box (9) is fixedly provided with a discharging pipe (10), and the discharging pipe (10) is provided with a control valve (18).

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