Regenerated concrete aggregate chemical slurry coating reinforced drying equipment
By employing a multi-layered nested structure design of inner, middle, and outer rollers, along with the use of a scraping component, the problems of short aggregate movement time and vent blockage in traditional drum dryers are solved. This achieves uniform and efficient drying of recycled concrete aggregates, while reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUJING SENPENG CONCRETE CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-04-24
AI Technical Summary
Traditional drum dryers suffer from problems such as short aggregate movement time, uneven drying, and easy clogging of ventilation holes by chemical slurry, which affect the performance of recycled concrete aggregates and equipment maintenance costs.
The design employs a multi-layered nested structure of inner, middle, and outer rollers, combined with the guiding effect of spiral and arc-shaped guide plates to extend the movement path and residence time of aggregates within the rollers. The scraping component prevents accumulation and clogging of ventilation holes, while the heating component enhances drying efficiency.
It significantly improves drying efficiency, avoids uneven drying and clogging of ventilation holes, improves aggregate quality, and reduces maintenance costs.
Smart Images
Figure CN224162876U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of concrete processing technology, specifically relating to a chemical slurry coating and drying device for recycled concrete aggregates. Background Technology
[0002] In the field of concrete processing, the treatment and strengthening technology of recycled concrete aggregates is particularly important. Traditional drum dryers are widely used for aggregate drying, but they have the following shortcomings in actual use: First, the aggregate movement time inside a traditional drum dryer is relatively short, and due to severe aggregate accumulation, the drying is uneven, affecting the overall performance of the recycled concrete aggregates. Second, when drying recycled concrete aggregates coated with chemical slurry, the slurry easily adheres to the ventilation holes on the inner wall of the drum, causing blockage, which not only reduces drying efficiency but also increases equipment maintenance costs and cleaning difficulty. Utility Model Content
[0003] To overcome the problems of short aggregate movement time, uneven drying, and easy clogging of ventilation holes by aggregate coated with chemical slurry in traditional drum dryers, this invention provides a chemical slurry-coated and reinforced drying device for recycled concrete aggregates. Through a multi-layered nested structure design of inner, middle, and outer drums, the aggregates flow in both forward and reverse directions within the drums. Combined with the guiding and dispersing effects of spiral and arc-shaped guide plates, this not only avoids uneven drying caused by aggregate accumulation but also extends the movement path and residence time of the aggregates within the drums, significantly improving the drying effect. Simultaneously, the stirring and scraping functions of the wall-scraping component effectively prevent aggregate accumulation and ventilation hole clogging. Combined with the heating component, this further enhances drying efficiency and aggregate quality while reducing maintenance costs.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: A chemical slurry coating and strengthening drying device for recycled concrete aggregate mainly includes an outer roller, a middle roller, an inner roller, a drive mechanism, a scraping assembly, a heating assembly, and a frame; the outer roller is rotatably mounted on the frame via support wheels, and a drive mechanism for driving the outer roller to rotate is installed on the frame. The outer roller has an inlet and an outlet at both ends, and a middle roller and an inner roller coaxially mounted inside it. The inner roller is open at both ends, with one end connected to the inlet and the other end having a gap with the middle roller. The middle roller is open at one end and is mounted in the opposite direction outside the inner roller, and is fixed to the outer roller by a support frame. The inner, middle, and outer rollers are connected in a fixed manner; an annular flow guiding cavity is formed between them. The inner wall of the outer roller is provided with a spiral flow guide plate along its axial direction. The inner wall of the middle roller is fixed with multiple sets of arc-shaped flow guide plates along its axial direction. Each set of arc-shaped flow guide plates is evenly distributed along the circumference of the inner wall of the middle roller, and the inclination direction of the arc-shaped flow guide plates is the same as the rotation direction of the middle roller. Ventilation holes are evenly opened on the cylinder walls of the middle and inner rollers. The feed shell is installed at one end of the frame and connected to the feed port of the outer roller. A heating component is fixed on the outer wall of the feed shell. The discharge shell is installed at the other end of the frame and connected to the discharge port of the outer roller. A scraping component for scraping the wall and mixing aggregates is installed inside the inner roller.
[0005] The scraping assembly includes a support rod, connecting rods, and an arc-shaped scraper. One end of the support rod is installed inside the feed housing via a support member, and the other end passes through the end of the middle drum and is installed inside the discharge housing via a support member. The support rod is coaxial with the inner drum. Multiple connecting rods are equidistantly installed along the axial direction on the support rod. An arc-shaped scraper made of wear-resistant material is installed at an angle at the end of the connecting rod. The arc-shaped edge of the scraper is in contact with the inner wall of the inner drum. The inclination direction of the arc-shaped scraper is opposite to the rotation direction of the inner drum. The distance between adjacent connecting rods is less than the orthographic projection length of the arc-shaped scraper. This ensures that the scraping assembly can thoroughly and continuously remove aggregate residue and chemical slurry adhering to the inner wall of the inner drum during rotation.
[0006] The drive mechanism includes a motor, gears, and a gear ring. The gear ring is provided on the outer wall of the outer drum. The motor is mounted on the frame, and its output end is equipped with a gear that meshes with the gear ring. The gear transmission enables the stable rotation of the outer drum, thereby driving the middle drum and inner drum to rotate synchronously, ensuring the uniform distribution and thorough drying of the aggregate in the drum.
[0007] The heating assembly includes a fan and a serpentine heating tube. A hopper connected to the feed inlet is installed on the top of the feed shell, and an air inlet is opened at the end. A fan is installed at the air inlet, and a serpentine heating tube is installed inside it. The fan introduces the heated air into the annular guide cavity. Combined with the design of the ventilation holes, the hot air can be efficiently circulated in the drum, thereby accelerating the evaporation of moisture on the aggregate surface and the solidification process of the chemical slurry.
[0008] The discharge shell is equipped with an exhaust vent at the top, a filter screen at the exhaust vent, and a hopper-shaped discharge port at the bottom. The filter screen is used to block aggregate dust from being discharged with the hot air, and the hopper-shaped design of the discharge port facilitates the rapid discharge of dried aggregate and avoids material accumulation.
[0009] The beneficial effects of this utility model are:
[0010] This invention employs a multi-layered nested structure design of inner, middle, and outer rollers, allowing aggregates to flow in both forward and reverse directions within the rollers. Combined with the guiding and dispersing effects of spiral and arc-shaped guide plates, this not only avoids uneven drying caused by aggregate accumulation but also extends the movement path and residence time of the aggregates within the rollers, significantly improving the drying effect. Simultaneously, the stirring and scraping functions of the wall-scraping component effectively prevent aggregate accumulation and vent blockage. When used in conjunction with the heating component, it further enhances drying efficiency and aggregate quality while reducing maintenance costs. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0012] Figure 2 This is a cross-sectional view of the internal structure of this utility model;
[0013] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;
[0014] Figure 4 This is a three-dimensional cross-sectional view of the present invention;
[0015] The attached diagram is labeled as follows: 1. Outer roller; 2. Middle roller; 3. Inner roller; 4. Drive mechanism; 5. Scraper assembly; 6. Heating assembly; 7. Support wheel; 8. Feed inlet; 9. Discharge outlet; 10. Spiral guide plate; 11. Arc-shaped guide plate; 12. Discharge outlet; 13. Feed shell; 14. Discharge shell; 15. Support rod; 16. Connecting rod; 17. Arc-shaped scraper; 18. Motor; 19. Gear; 20. Gear ring; 21. Fan; 22. Serpentine heating element; 23. Hopper; 24. Exhaust vent; 25. Filter screen; 26. Frame. Detailed Implementation
[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.
[0017] This utility model discloses a chemical slurry coating and strengthening drying device for recycled concrete aggregates. The device mainly includes an outer roller 1, a middle roller 2, an inner roller 3, a drive mechanism 4, a wall scraping assembly 5, a heating assembly 6, and a frame 26. The outer roller 1 is rotatably mounted on the frame 26 via support wheels 7. It has an inlet 8 and an outlet 9 at both ends. A gear ring 20 is provided on the outer wall of the outer roller 1, which meshes with the gear 19 in the drive mechanism 4 to realize the rotation of the outer roller 1. The drive mechanism 4 includes a motor 18, a gear 19, and a gear ring 20. The motor 18 is fixedly mounted on the frame 26, and its output end is connected to the gear 19, which drives the outer roller 1 to rotate stably through gear transmission. The outer roller 1 is nested inside a middle roller 2 and an inner roller 3, which are coaxially arranged together to form an annular guide cavity. The middle roller 2 is open at one end and is fitted onto the outside of the inner roller 3 in the opposite direction, and is fixedly connected to the outer roller 1 by a support frame. The inner roller 3 is open at both ends, with one end connected to the feed port 8 and the other end having a gap with the middle roller 2 to allow aggregate to enter the annular guide cavity. The inner wall of the outer roller 1 is provided with a spiral guide plate 10 along its axial direction to guide the aggregate to move along the discharge port of the outer roller 1. The inner wall of the middle roller 2 is fixed with multiple sets of arc-shaped guide plates 11 along its axial direction. Each set of arc-shaped guide plates 11 is evenly distributed along the circumference of the inner wall of the middle roller 2, and the inclination direction of the arc-shaped guide plates 11 is the same as the rotation direction of the middle roller 2, which is used to disperse the aggregate and guide the aggregate to move along the end of the middle roller 2. Ventilation holes are evenly opened on the cylinder walls of the middle roller 2 and the inner roller 3 for hot air circulation to ensure the efficient evaporation of moisture on the surface of the aggregate and the solidification process of the chemical slurry.
[0018] The feed housing 13 is installed at one end of the frame 26 and connected to the feed inlet 8 of the outer drum 1. A hopper 23 is provided at the top of the feed housing 13 for introducing the aggregate to be processed into the equipment. An air inlet is provided at the end of the feed housing 13, and a fan 21 is installed at the air inlet. A serpentine electric heating tube 22 is installed inside the fan 21, forming a heating assembly 6. The heating assembly 6 introduces the air heated by the serpentine electric heating tube 22 into the annular guide cavity through the fan 21. Combined with the design of the ventilation holes, this achieves efficient circulation of hot air within the drum. After entering the feed shell 13, the material flows along the annular guide cavity, enters the middle roller 2 and inner roller 3 through the ventilation holes, and is finally discharged from the exhaust port 24 at the top of the discharge shell 14. A filter screen 25 is installed at the exhaust port 24 to block aggregate dust from being discharged with the hot air. The exhaust port 24 can be connected to a dust filtration device through an external pipe to enhance the dust removal effect and reduce dust pollution to the environment. The bottom of the discharge shell 14 is provided with a bucket-shaped discharge port 12, which facilitates the rapid discharge of dried aggregate and avoids the accumulation of material.
[0019] The inner roller 3 is equipped with a scraper assembly 5, which is used to remove aggregate residue and chemical slurry adhering to the inner wall of the inner roller 3. The scraper assembly 5 includes a support rod 15, a connecting rod 16, and an arc-shaped scraper 17. One end of the support rod 15 is installed in the feed shell 13 through a support member, and the other end passes through the end of the middle roller 2 and is installed in the discharge shell 14 through a support member. The support rod 15 is coaxial with the inner roller 3. Multiple connecting rods 16 are equidistantly installed on the support rod 15 along the axial direction. The ends of the connecting rods 16 are inclined with arc-shaped scrapers 17 made of wear-resistant material, which further improves the service life. The arc-shaped edge of the arc-shaped scraper 17 fits against the inner wall of the inner roller 3, and the distance between adjacent connecting rods 16 is less than the orthographic projection length of the arc-shaped scraper 17, so as to ensure that the scraper assembly 5 can continuously remove aggregate residue and chemical slurry adhering to the inner wall of the inner roller 3 during rotation, preventing aggregate accumulation and ventilation hole blockage. The inclination direction of the arc-shaped scraper 17 is opposite to the rotation direction of the inner roller 3, which is used to guide the aggregate to move along the end of the inner roller 3.
[0020] This invention employs a multi-layered nested structure design of inner roller 3, middle roller 2, and outer roller 1, allowing aggregates to flow in both forward and reverse directions within the rollers. Combined with the guiding and dispersing effects of spiral guide plate 10 and arc-shaped guide plate 11, this not only avoids uneven drying caused by aggregate accumulation but also extends the movement path and residence time of the aggregates within the rollers, significantly improving the drying effect. Simultaneously, the stirring and scraping functions of the wall scraping component 5 effectively prevent aggregate accumulation and vent blockage. When used in conjunction with the heating component 6, it further enhances drying efficiency and aggregate quality while reducing maintenance costs.
[0021] Work process:
[0022] In actual operation, the aggregate to be processed enters the feed shell 13 through the feed hopper 23, and then enters the inner drum 3 through the feed port 8. After the motor 18 is started, it drives the outer drum 1 to rotate through the meshing transmission of the gear 19 and the gear ring 20, thereby causing the middle drum 2 and the inner drum 3 to rotate synchronously. The aggregate is affected by the rotational force in the inner drum 3 and moves along the inner wall of the inner drum 3. At the same time, the arc-shaped scraper 17 of the scraper assembly 5 scrapes off the aggregate residue and chemical slurry adhering on the inner wall of the inner drum 3, preventing aggregate accumulation and ventilation hole blockage. The aggregate enters the middle drum 2 through one end opening of the inner drum 3. Under the dispersion and guidance of the arc-shaped guide plate 11, it moves in the opposite direction to the inner drum 1. Under the guidance of the spiral guide plate 10, it moves along the axial direction of the outer drum to the discharge port, significantly extending the movement path and residence time of the aggregate in the drum and improving the drying effect. At the same time, the fan 21 in the heating assembly 6 introduces the air heated by the serpentine electric heating tube 22 into the annular guide cavity. The hot air enters the middle drum 2 and the inner drum 3 through the ventilation holes, accelerating the evaporation of moisture on the aggregate surface and the solidification process of the chemical slurry. The dried aggregate enters the discharge shell 14 from the discharge port 9 and is discharged through the discharge port 12, while the hot air is discharged from the exhaust port 24. The filter screen 25 effectively blocks aggregate dust from being discharged with the hot air, reducing its pollution to the environment.
[0023] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.
Claims
1. A chemical slurry coating and drying device for recycled concrete aggregate, characterized in that: The aforementioned chemical slurry coating and strengthening drying equipment for recycled concrete aggregate includes an outer roller (1), a middle roller (2), an inner roller (3), a drive mechanism (4), a scraping assembly (5), a heating assembly (6), and a frame (26). The outer roller (1) is rolled on the frame (26) via support wheels (7). The outer roller (1) has an inlet (8) and an outlet (9) at both ends. The middle roller (2) and the inner roller (3) are nested inside the outer roller (1) and are coaxially arranged therewith. The inner roller (3) is open at both ends, with one end connected to the inlet (8) and the other end having a gap between it and the middle roller (2). The middle roller (2) is open at one end and is sleeved in the opposite direction outside the inner roller (3) and is fixedly connected to the outer roller (1) through a support frame. A ring is formed between the inner roller (3), the middle roller (2), and the outer roller (1). The outer drum (1) has a spiral guide plate (10) on its inner wall along its axial direction. The middle drum (2) has multiple sets of arc-shaped guide plates (11) fixed on its inner wall along its axial direction. Each set of arc-shaped guide plates (11) is evenly distributed along the circumference of the inner wall of the middle drum (2), and the inclination direction of the arc-shaped guide plates (11) is the same as the rotation direction of the middle drum (2). Ventilation holes are evenly opened on the cylinder walls of the middle drum (2) and the inner drum (3). The feed shell (13) is installed at one end of the frame (26) and connected to the feed port (8) of the outer drum (1). The heating component (6) is fixed on the outer wall of the feed shell (13). The discharge shell (14) is installed at the other end of the frame (26) and connected to the discharge port (9) of the outer drum (1). The inner drum (3) is equipped with a scraping component (5) for scraping the wall and mixing aggregate.
2. The chemical slurry coating and strengthening drying equipment for recycled concrete aggregate as described in claim 1, characterized in that: The scraping assembly (5) includes a support rod (15), a connecting rod (16), and an arc-shaped scraper (17). One end of the support rod (15) is installed in the feed shell (13) through a support member, and the other end passes through the end of the middle roller (2) and is installed in the discharge shell (14) through a support member. The support rod (15) is coaxial with the inner roller (3). Multiple connecting rods (16) are equidistantly installed on the support rod (15) along the axial direction. An arc-shaped scraper (17) made of wear-resistant material is installed at the end of the connecting rod (16). The arc-shaped edge of the arc-shaped scraper (17) is in contact with the inner wall of the inner roller (3). The inclination direction of the arc-shaped scraper (17) is opposite to the rotation direction of the inner roller (3). The distance between adjacent connecting rods (16) is less than the orthographic projection length of the arc-shaped scraper (17).
3. A chemical slurry coating and strengthening drying device for recycled concrete aggregate as described in claim 1 or 2, characterized in that: The drive mechanism (4) includes a motor (18), a gear (19) and a gear ring (20). The gear ring (20) is provided on the outer wall of the outer roller (1). The motor (18) is mounted on the frame (26), and its output end is equipped with a gear (19) that meshes with the gear ring (20).
4. The chemical slurry coating and strengthening drying equipment for recycled concrete aggregate as described in claim 3, characterized in that: The heating assembly (6) includes a fan (21) and a serpentine heating tube (22). A hopper (23) communicating with the feed inlet (8) is installed on the top of the feed shell (13). An air inlet is opened at the end of the feed shell (13). A fan (21) is installed at the air inlet. A serpentine heating tube (22) is installed inside the feed shell (13).
5. The chemical slurry coating and strengthening drying equipment for recycled concrete aggregate as described in claim 3, characterized in that: The top of the discharge shell (14) is equipped with an exhaust port (24), a filter screen (25) is installed at the exhaust port (24), and the bottom of the discharge shell (14) is provided with a hopper-shaped discharge port (12).