Waste fiber concrete aggregate grading regeneration device
By combining grading and air separation mechanisms, effective separation of fibers and aggregates is achieved, solving the problem of high fiber content in waste fiber concrete recycling devices, improving the strength and workability of recycled concrete, and making it suitable for industrial production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG UNIV OF PETROCHEMICAL TECH
- Filing Date
- 2025-05-27
- Publication Date
- 2026-06-05
AI Technical Summary
Existing waste fiber concrete recycling devices cannot effectively remove or reduce fiber content, resulting in recycled concrete with low strength, high water absorption, and deteriorated workability.
A waste fiber-reinforced concrete aggregate grading and recycling device was designed, which includes a grading mechanism and an air separation mechanism. The fiber and aggregate are separated through grading and air separation, thereby reducing the fiber content in the aggregate.
It improves the strength of recycled concrete, reduces water absorption, and enhances its workability, making it suitable for industrial production.
Smart Images
Figure CN224321843U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of concrete recycling technology, and in particular relates to a graded recycling device for waste fiber concrete aggregate. Background Technology
[0002] The rapid development of the construction industry has led to an increasing amount of construction waste. In order to improve the resource utilization of construction waste, waste concrete and other construction waste are crushed, screened and washed to form aggregates, which are then applied to concrete to form recycled aggregate concrete. The application of recycled aggregate concrete effectively solves the problem of waste of construction waste resources.
[0003] To improve the strength and other properties of concrete, fibers (such as steel fibers or glass fibers) are typically added to the aggregate to form fiber-reinforced concrete. When this type of concrete is recycled after disposal, a specialized process is needed to remove or reduce the fiber content to meet the performance requirements of the recycled aggregate. However, existing waste concrete recycling equipment lacks the function of removing or reducing fibers. Recycled concrete produced directly from high-fiber-content aggregates has lower strength, higher water absorption, and deteriorated workability.
[0004] To improve the strength, reduce the water absorption, and enhance the workability of recycled concrete generated from waste fiber-reinforced concrete aggregate, a graded recycling device for waste fiber-reinforced concrete aggregate is proposed. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model proposes a waste fiber concrete aggregate grading and recycling device.
[0006] To achieve the above objectives, this utility model provides a waste fiber-reinforced concrete aggregate grading and recycling device, comprising:
[0007] The cylinder has a feed hopper at the top and a first discharge port at the bottom.
[0008] A grading mechanism is provided on the upper part of the cylinder. The grading mechanism includes two sets of screens arranged vertically. The screen mesh of the upper one is larger than that of the screen of the lower one. The side wall of the cylinder is provided with a second discharge port corresponding to the two screens respectively.
[0009] An air separation mechanism is provided at the lower part of the cylinder. The air separation mechanism includes a fan, which is fixed to the side wall of the cylinder and blows air laterally toward the inside of the cylinder. A third discharge port is provided on the side wall of the cylinder facing the fan.
[0010] Preferably, the grading mechanism further includes four mounting plates and several springs. The several springs are evenly fixed to the bottom of the left and right sides of the two screens. The four mounting plates are respectively connected to the lower sides of the two screens through the springs. The four mounting plates are fixed to the left and right sides of the inner wall of the cylinder in pairs. The screens are inclined, and the lower end is smoothly connected to the second discharge port.
[0011] Preferably, the grading mechanism further includes a hinge rod, which is disposed at the end of the two screens away from the second discharge port and is hinged to the two screens. A top plate is fixedly connected to the bottom of the hinge rod, and a cam is abutted against the bottom of the top plate. A rotating shaft is fixedly connected to the cam, and the rotating shaft passes through the cylinder and is rotatably connected to the cylinder. One end of the rotating shaft extends out of the outer wall of the cylinder and is fixedly connected to a motor.
[0012] Preferably, a guide trough is smoothly connected to the outside of the second discharge port. The guide trough is fixed to the outer wall of the cylinder. Both guide troughs are inclined downwards and face different directions.
[0013] Preferably, the third discharge port is located diagonally below the air outlet of the blower, and a discharge cylinder is fixedly connected to the outside of the third discharge port. A cloth bag is provided on the end of the discharge cylinder away from the third discharge port.
[0014] Preferably, a plurality of inwardly bent fixing hooks are fixedly connected to the outer circumference of the end of the discharge cylinder away from the third discharge port, and a connecting structure is fixedly connected to the opening of the cloth bag corresponding to the fixing hooks, and the connecting structure is detachably connected to the fixing hooks.
[0015] Preferably, the bottom of the cylinder is cone-shaped, and the first discharge port is located at the bottom of the cone.
[0016] Preferably, a number of legs are fixedly connected to the bottom of the cylinder.
[0017] Compared with the prior art, the present invention has the following advantages and technical effects:
[0018] Waste fiber-reinforced concrete, after being crushed, enters the cylinder through the feed hopper. It first undergoes grading and screening by a grading mechanism. Larger aggregate particles are intercepted by the upper screen, while smaller particles pass through and are further screened by the lower screen, exiting from different second discharge ports to obtain aggregates with varying particle sizes. This meets the diverse needs of different projects for aggregate particle sizes and improves the adaptability of aggregate use. The smaller aggregate particles that pass through multiple screenings then enter the air-classifying mechanism for further air separation. The air-classifying mechanism's fan blows air laterally into the cylinder, separating fibers and aggregates based on their density and mass differences. Lightweight fibers are blown towards the third discharge port by the airflow, while heavier aggregates fall due to gravity, achieving fiber-aggregate separation, reducing the fiber content in the aggregate, increasing the strength of the recycled concrete, reducing water absorption, and improving workability. The final aggregate product, after screening and air separation, is discharged from the first discharge port at the bottom of the cylinder. The overall structure is compact and easy to operate, suitable for industrial production. Attached Figure Description
[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:
[0020] Figure 1 This is a schematic diagram of the waste fiber concrete aggregate grading and recycling device of this utility model;
[0021] Figure 2 This is a cross-sectional view of the waste fiber concrete aggregate grading and recycling device of this utility model;
[0022] Figure 3 This is a schematic diagram of the grading mechanism in this utility model;
[0023] Figure 4 This is a schematic diagram of the bag connection in this utility model.
[0024] In the diagram: 1. Cylinder; 2. Feed hopper; 3. First discharge port; 401. Screen; 402. Second discharge port; 403. Mounting plate; 404. Spring; 405. Hinge rod; 406. Top plate; 407. Cam; 408. Rotating shaft; 409. Motor; 501. Fan; 502. Third discharge port; 6. Guide chute; 7. Discharge cylinder; 8. Cloth bag; 9. Fixing hook; 10. Connecting structure; 11. Support leg. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0027] Reference Figures 1 to 4 As shown, this embodiment provides a waste fiber-reinforced concrete aggregate grading and recycling device, including:
[0028] The cylinder 1 has a feed hopper 2 at the top and a first discharge port 3 at the bottom.
[0029] A grading mechanism is set on the upper part of the cylinder 1. The grading mechanism includes two sets of screens 401 set up at the top and bottom. The mesh size of the upper screen 401 is larger than that of the lower screen 401. The side wall of the cylinder 1 is provided with a second discharge port 402 corresponding to the two screens 401 respectively.
[0030] An air separation mechanism is located at the lower part of the cylinder 1. The air separation mechanism includes a fan 501, which is fixed to the side wall of the cylinder 1 and blows air horizontally toward the inside of the cylinder 1. A third discharge port 502 is provided on the side wall of the cylinder 1 facing the fan 501.
[0031] Waste fiber-reinforced concrete, after being crushed, enters the cylinder 1 from the feed hopper 2. It first undergoes grading and screening by a grading mechanism. Larger aggregate particles are intercepted by the upper screen 401, while smaller aggregate particles pass through the upper screen 401 and are further screened by the lower screen 401, exiting from different second discharge ports 402 to obtain aggregates with different particle size ranges. This meets the diverse needs of different projects for aggregate particle size and improves the adaptability of aggregate use. The smaller aggregate particles that pass through multiple screenings enter the air classification mechanism for further air classification. The air classification mechanism's fan 501 blows air laterally into the cylinder 1, separating fibers and aggregates based on their density and mass differences. Lighter fibers are blown towards the third discharge port 502 by the air force and discharged, while heavier aggregates fall due to gravity, achieving fiber-aggregate separation, reducing the fiber content in the aggregate, increasing the strength of the recycled concrete, reducing water absorption, and improving workability. The final aggregate product after screening and air classification is discharged from the first discharge port 3 at the bottom of the cylinder 1. Its overall structure is compact and easy to operate, making it suitable for industrial production.
[0032] Furthermore, the upper screen 401 has a sieve aperture of 5mm, and the lower screen 401 has a sieve aperture of 2mm. After being screened by two layers of screen 401, coarse aggregate larger than 5mm is separated and can be fed into the crushing device for further crushing; medium aggregate of 2mm-5mm is separated and can directly enter the strengthening process for producing recycled aggregate for use in road base courses, embankment projects, and other applications with lower strength requirements; fine aggregate smaller than 2mm has a smaller particle size, and the fibers are more easily encased in the mortar matrix, so it enters the air classification process for further processing to reduce the fiber content.
[0033] Further optimization of the scheme: the grading mechanism also includes four mounting plates 403 and several springs 404. The springs 404 are evenly fixed to the bottom of the left and right sides of the two screens 401. The four mounting plates 403 are respectively connected to the lower sides of the two screens 401 through the springs 404. The four mounting plates 403 are fixed to the left and right sides of the inner wall of the cylinder 1 in pairs. The screens 401 are set at an angle, and the lower end is smoothly connected to the second discharge port 402.
[0034] By incorporating a spring 404 to elastically support the screen 401 in the grading mechanism and adopting an inclined design, the aggregate grading efficiency and equipment reliability are significantly improved. The spring 404 can buffer the impact force of falling aggregates, reduce wear on the screen 401 and extend its service life, while allowing the screen 401 to generate slight vibrations under material impact, preventing fine particles from clogging the mesh. The inclined screen 401 allows the aggregates to slide naturally towards the discharge port under gravity, avoiding accumulation. Combined with the smooth connection of the second discharge port 402, it ensures that aggregates of different particle sizes are discharged quickly, effectively improving the overall screening efficiency and continuity.
[0035] The grading mechanism further optimizes the design by including a hinge rod 405. The hinge rod 405 is located at the end of the two screens 401 away from the second discharge port 402 and is hinged to the two screens 401. A top plate 406 is fixedly connected to the bottom of the hinge rod 405. A cam 407 is abutted against the bottom of the top plate 406. A rotating shaft 408 is fixedly connected to the cam 407. The rotating shaft 408 passes through the cylinder 1 and is rotatably connected to the cylinder 1. A motor 409 is fixedly connected to one end of the rotating shaft 408 that extends out of the outer wall of the cylinder 1.
[0036] The structural design of driving the screen 401 to vibrate via the cam 407 significantly improves the continuity and anti-clogging ability of the aggregate grading process: the motor 409 drives the cam 407 on the rotating shaft 408 to rotate, periodically pushing the top plate 406 at the bottom of the hinge rod 405, causing the screen 401 to vibrate reciprocally, effectively preventing fibers or fine aggregates from clogging the screen holes and ensuring stable grading efficiency; the hinged connection allows the screen 401 to maintain structural flexibility during vibration, reducing mechanical wear and extending the service life of the equipment.
[0037] The scheme is further optimized by smoothly connecting the second discharge port 402 to the outside of the guide trough 6. The guide trough 6 is fixed to the outer wall of the cylinder 1. Both guide troughs 6 are inclined downward and face different directions.
[0038] By setting downward-sloping guide troughs 6 with different directions outside the second discharge port 402, the discharge efficiency and flow direction control of graded aggregates are significantly optimized: the smooth connection and inclined design of the guide troughs 6 ensure that aggregates of different particle sizes are discharged smoothly under the action of gravity, avoiding blockage and residue caused by turning or resistance; the two guide troughs 6 are oriented in different directions, which can guide the graded aggregates to different collection areas respectively, avoiding aggregate accumulation caused by unidirectional material feeding, and improving the flexibility and practicality of the layout.
[0039] In a further optimized design, the third discharge port 502 is located diagonally below the air outlet of the blower 501. A discharge cylinder 7 is fixedly connected to the outside of the third discharge port 502, and a cloth bag 8 is provided on the end of the discharge cylinder 7 away from the third discharge port 502.
[0040] The discharge cylinder 7 guides the air-separated fibers to the filter bag 8, which efficiently collects the lightweight fibers by using the filtration effect of the filter bag 8, preventing fiber dust from spreading and polluting the environment. The flexible material of the filter bag 8 can adapt to airflow fluctuations, ensuring sealing performance, while also being easy to disassemble and replace, realizing convenient recycling of separated fibers and equipment maintenance, taking into account both environmental protection requirements and operational economy.
[0041] In a further optimized design, a number of inwardly bent fixing hooks 9 are fixedly connected to the outer periphery of the end of the discharge cylinder 7 away from the third discharge port 502. A connecting structure 10 is fixedly connected to the opening of the cloth bag 8 corresponding to the fixing hooks 9. The connecting structure 10 and the fixing hooks 9 are detachably connected.
[0042] Furthermore, the connecting structure 10 can be any structure that can be connected to the fixing hook 9, such as a strap or a hanging ring.
[0043] The detachable design of the fixing hook 9 and the strap / hanging ring allows the cloth bag 8 to be quickly replaced after the fiber collection is saturated, avoiding the tedious process of stopping the machine for cleaning and improving the efficiency of continuous operation of the equipment.
[0044] The design was further optimized by setting the bottom of the cylinder 1 into a cone shape, with the first discharge port 3 located at the bottom of the cone.
[0045] By designing the bottom of the cylinder 1 as a cone and opening the first discharge port 3 at its bottom, the aggregate discharge efficiency and equipment cleanliness are significantly improved: the cone structure allows the aggregate after grading and air separation to naturally concentrate at the bottom under the action of gravity, avoiding material retention and residue that is easily caused by the flat bottom surface, and ensuring that the final product is completely discharged; the discharge port is located at the lowest point of the cone, which further optimizes the material flow path, reduces the risk of blockage, and facilitates the docking of subsequent collection devices, improves the continuity and automation of the overall recycling process, reduces the frequency of manual cleaning, and enhances the practicality and reliability of the equipment.
[0046] The design was further optimized by attaching several support legs 11 to the bottom of the cylinder 1.
[0047] The bottom support leg 11 provides stable support for the device, increases the equipment's ground clearance, optimizes the bottom discharge space, and reduces operational interference caused by uneven ground, ensuring reliable operation of the device under complex working conditions, while taking into account both structural strength and operational flexibility.
[0048] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.
[0049] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element 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 utility model.
[0050] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.
Claims
1. A graded recycling device for waste fiber-reinforced concrete aggregate, characterized in that, include: The cylinder (1) has a feed hopper (2) at the top and a first discharge port (3) at the bottom. A grading mechanism is provided on the upper part of the cylinder (1). The grading mechanism includes two sets of screens (401) arranged vertically. The screen (401) located on the upper part has a larger mesh size than the screen (401) located on the lower part. The side wall of the cylinder (1) is provided with a second discharge port (402) corresponding to the two screens (401). An air separation mechanism is provided at the lower part of the cylinder (1). The air separation mechanism includes a fan (501). The fan (501) is fixed to the side wall of the cylinder (1) and blows air horizontally toward the inside of the cylinder (1). A third discharge port (502) is provided on the side wall of the cylinder (1) facing the fan (501).
2. The waste fiber-reinforced concrete aggregate grading and recycling device according to claim 1, characterized in that: The grading mechanism also includes four mounting plates (403) and several springs (404). The several springs (404) are evenly fixed to the bottom of the left and right sides of the two screens (401). The four mounting plates (403) are respectively connected to the lower sides of the two screens (401) through the springs (404). The four mounting plates (403) are fixed to the left and right sides of the inner wall of the cylinder (1) in pairs. The screens (401) are inclined, and the lower end is smoothly connected to the second discharge port (402).
3. The waste fiber-reinforced concrete aggregate grading and recycling device according to claim 1, characterized in that: The grading mechanism further includes a hinge rod (405), which is located at the end of the two screens (401) away from the second discharge port (402) and is hinged to the two screens (401). A top plate (406) is fixedly connected to the bottom of the hinge rod (405), and a cam (407) is abutted against the bottom of the top plate (406). A rotating shaft (408) is fixedly connected to the cam (407), which passes through the cylinder (1) and is rotatably connected to the cylinder (1). One end of the rotating shaft (408) extends out of the outer wall of the cylinder (1) and is fixedly connected to a motor (409).
4. The waste fiber-reinforced concrete aggregate grading and recycling device according to claim 1, characterized in that: The second discharge port (402) is smoothly connected to a guide groove (6), which is fixed to the outer wall of the cylinder (1). Both guide grooves (6) are inclined downward and face different directions.
5. The waste fiber-reinforced concrete aggregate grading and recycling device according to claim 1, characterized in that: The third discharge port (502) is located diagonally below the air outlet of the blower (501). A discharge cylinder (7) is fixedly connected to the outside of the third discharge port (502). A cloth bag (8) is provided on the end of the discharge cylinder (7) away from the third discharge port (502).
6. The waste fiber-reinforced concrete aggregate grading and recycling device according to claim 5, characterized in that: The discharge cylinder (7) has several inwardly bent fixing hooks (9) fixedly connected to the outer periphery of one end away from the third discharge port (502). The opening of the cloth bag (8) is fixedly connected to the fixing hooks (9) with a connecting structure (10). The connecting structure (10) is detachably connected to the fixing hooks (9).
7. The waste fiber-reinforced concrete aggregate grading and recycling device according to claim 1, characterized in that: The bottom of the cylinder (1) is set in a cone shape, and the first discharge port (3) is opened at the bottom of the cone shape.
8. The waste fiber-reinforced concrete aggregate grading and recycling device according to claim 1, characterized in that: Several legs (11) are fixed to the bottom of the cylinder (1).