A cold-mixed recycled fine aggregate double-helix mixing device

Abstract

This utility model discloses a cold-mix recycled fine aggregate double-helix mixing device, belonging to the technical field of mixing devices. It includes a silo body, with a top cover snapped onto the top of the silo body. A drive chamber is fixedly connected to the top of the top cover. A feed hopper is fixedly connected to one end of the top cover, and an exhaust pipe is fixedly connected to the other end of the top cover through an opening. A filter assembly is fixedly connected to the side wall of the exhaust pipe, and a support sleeve is rotatably connected inside the cavity of the top cover. The silo body provided by this utility model improves mixing efficiency and uniformity while simultaneously filtering the exhaust gas generated during mixing. This solves the problems of low mixing efficiency and uneven mixing in existing cold-mix recycled fine aggregate mixing devices when mixing fine aggregates with different characteristics, as well as the problems of inadequate exhaust dust removal systems and serious dust content in the exhaust gas.

Description

Technical Field

[0001] This utility model relates to the field of mixing device technology, specifically to a cold-mixed recycled fine aggregate double-helix mixing device. Background Technology

[0002] The cold-mixed recycled fine aggregate double-helix mixing device is a device that uses a double-helix structure to rotate and mix materials such as cold-mixed recycled fine aggregate evenly.

[0003] A search revealed the following publication (announcement) number: CN116005518A, entitled: "A Dual Mixing System for Recycled Materials," which includes a support frame, a first mixing mechanism, a second mixing mechanism, and a conveyor arranged sequentially from top to bottom. The first mixing mechanism is mounted on the support frame, and a moving mechanism is installed on the second mixing mechanism, allowing the moving mechanism to move horizontally on the support frame. This application can save costs and reduce the floor space required.

[0004] The above technical solution has the following shortcomings;

[0005] The above-mentioned solutions have significant shortcomings in practical applications. Existing devices have poor adaptability to fine aggregates with different properties. Materials with a density difference of up to 20%, such as quartz sand and limestone sand, are prone to stratification. Fluctuations in moisture content of 1%-8% cause material agglomeration or dispersion, resulting in the inability to uniformly coat components such as cement. Single / twin-shaft constant-speed mixing with blades of fixed pitch and uniform diameter creates a dead zone within the device where the material turnover rate is less than 30% of the normal range. Furthermore, the rotation speed cannot adapt to the requirements of the mixing stage, extending the mixing cycle by 30%-50%. The timing of feeding and discharging is out of control. Concentrated batch feeding causes material to separate due to gravity. The discharge lacks a homogenization buffer structure, resulting in sequential stratification, which exacerbates uneven mixing. In addition, a large amount of dust is generated during mixing and unloading. The exhaust dust removal system is inadequate, with unreasonable dust hood design, poor performance of dust removal equipment, and insufficient fan power, resulting in serious dust content in the exhaust. This not only endangers the health of operators, pollutes the workshop environment, and accelerates equipment wear, but also damages the surrounding ecology. Utility Model Content

[0006] In view of the problems existing in the current cold-mixed recycled fine aggregate double-spiral mixing device, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a cold-mixed recycled fine aggregate double-helix mixing device, which solves the problems of low mixing efficiency and uneven mixing of fine aggregates with different characteristics in existing cold-mixed recycled fine aggregate mixing devices, as well as the imperfect exhaust and dust removal system and serious dust content in the exhaust.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A cold-mixed recycled fine aggregate double-helix mixing device includes a silo body, a top cover snapped onto the top of the silo body, a drive chamber fixedly connected to the top of the top cover, a feed hopper fixedly connected to one end of the top of the top cover, an exhaust pipe fixedly connected to the other end of the top of the top cover through an opening, a filter assembly fixedly connected to the side wall of the exhaust pipe, and a support sleeve rotatably connected inside the cavity of the top cover.

[0010] An air inlet pipe is fixedly connected to the top of the drive chamber, and a support pipe is rotatably connected to the bottom of the air inlet pipe. One end of the support pipe passes through a support sleeve and is fixedly connected to a stirring spray plate. Spiral blades are fixedly connected to both ends of the support sleeve wall, and stirring scrapers are fixedly connected to both ends of the top of the support sleeve wall. A discharge valve is fixedly connected to the bottom of the chamber. A drive mechanism is fixedly connected to the support sleeve and the support pipe inside the drive chamber. Limiting mechanisms are fixedly connected to the top cover at both ends of the top of the chamber.

[0011] Preferably, the driving mechanism includes a motor, a drive gear, a spur gear, and a reverse gear. The motor is fixedly connected to the inner side wall of the drive chamber, and a drive gear is fixedly connected to one end of the motor. A spur gear is fixedly connected to the wall of the support tube, and a reverse gear is fixedly connected to the wall of the support sleeve. The two ends of the drive gear are respectively meshed with the spur gear and the reverse gear.

[0012] Preferably, the limiting mechanism includes a positioning plate, a U-shaped positioning seat, a threaded limiting port, and a limiting screw. Positioning plates are fixedly connected to both side walls of the top cover, and U-shaped positioning seats are fixedly connected to both top ends of the hopper. The positioning plates at both ends are inserted into the corresponding U-shaped positioning seats. The side walls of the positioning plates and U-shaped positioning seats at both ends are provided with corresponding threaded limiting ports, and the limiting screws are threadedly connected to them.

[0013] Preferably, the filter assembly includes a filter chamber, the filter chamber is provided with filter packing inside the chamber, the top of the filter chamber is fixedly connected to an exhaust port filter separation screen through an opening, and the bottom of the filter chamber is threadedly connected to a collection tank through a threaded opening.

[0014] Preferably, the stirring spray plate includes multiple hollow plates, and each side wall is provided with multiple spray holes.

[0015] Furthermore, a rotating handle is fixedly connected to one end of each of the two limiting screws.

[0016] Preferably, a control display is fixedly connected to the side wall of the chamber, and the cavity of the chamber is provided with a corrosion-resistant and non-stick ceramic coating.

[0017] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0018] 1. This utility model utilizes a driving mechanism to make the support pipe and support sleeve rotate in opposite directions, driving the mixing spray plate, spiral blades, and mixing scraper to form a counter-stirring force field, eliminating the mixing dead zone. It is highly adaptable to fine aggregates with different characteristics, such as density difference of up to 20% and moisture content fluctuation of 1%-8%, improving mixing efficiency by 30%-50% and significantly improving uniformity. The hollow plate structure of the mixing spray plate, combined with the spray nozzles to inject airflow or additives, further enhances the mixing effect.

[0019] 2. This utility model utilizes filter packing material and exhaust port filter separation screen installed in the filter assembly to perform multi-stage filtration of the mixed dust-laden gas. The collection tank collects the dust, effectively treating the dust-laden gas, reducing dust emissions, ensuring that the exhaust dust content meets environmental protection requirements, and reducing health hazards to operators and pollution to the environment.

[0020] 3. This utility model utilizes a positioning plate installed in the limiting mechanism to interlock with a U-shaped positioning seat and is fastened by a limiting screw, resulting in a quick and stable connection. The rotating handle facilitates operation, making it easy to disassemble and maintain the equipment. At the same time, it ensures airtightness to reduce dust leakage. The control display enables real-time monitoring and adjustment of parameters, improving the degree of automation. The corrosion-resistant and non-stick ceramic coating installed on the inner wall of the silo prevents material adhesion, reduces residue, extends the service life of the equipment, and facilitates cleaning and maintenance. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a front sectional view of the present invention;

[0024] Figure 3 This is a three-dimensional exploded view of the filter component of this utility model;

[0025] Figure 4 For the present utility model Figure 2 Enlarged schematic diagram of part A.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Bin body; 2. Top cover; 3. Drive bin; 4. Feed hopper; 5. Exhaust pipe; 6. Filter assembly; 7. Support sleeve; 8. Air inlet pipe; 9. Support pipe; 10. Mixing spray plate; 11. Spiral blade; 12. Mixing scraper; 13. Discharge valve; 14. Motor; 15. Drive gear; 16. Positive gear disc; 17. Negative gear disc; 18. Positioning plate; 19. U-shaped positioning seat; 20. Threaded limit port; 21. Limiting screw; 22. Filter bin; 23. Filter packing; 24. Exhaust port filter separation screen; 25. Collection tank; 26. Spray nozzle; 27. Rotating handle; 28. Control display. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] This utility model discloses a double-helix mixing device for cold-mixed recycled fine aggregates.

[0030] This utility model provides, for example Figure 1-4 The cold-mixed recycled fine aggregate double-helix mixing device shown includes a bin body 1, a top cover 2 snapped onto the top of the bin body 1, a drive bin 3 fixedly connected to the top of the top cover 2, a feed hopper 4 fixedly connected to one end of the top of the top cover 2, an exhaust pipe 5 fixedly connected to the other end of the top of the top cover 2 through an opening, a filter assembly 6 fixedly connected to the side wall of the exhaust pipe 5, and a support sleeve 7 rotatably connected inside the cavity of the top cover 2.

[0031] An air inlet pipe 8 is fixedly connected to the top of the drive chamber 3. A support pipe 9 is rotatably connected to the bottom of the air inlet pipe 8. One end of the support pipe 9 passes through the support sleeve 7 and is fixedly connected to a stirring spray plate 10. Spiral blades 11 are fixedly connected to both ends of the support sleeve 7. Stirring scrapers 12 are fixedly connected to both ends of the top of the support sleeve 7. A discharge valve 13 is fixedly connected to the bottom of the chamber 1. A drive mechanism is fixedly connected to the support sleeve 7 and the support pipe 9 inside the drive chamber 3. Limiting mechanisms are fixedly connected to the top cover 2 at both ends of the top of the chamber 1. The snap-fit ​​structure between the chamber 1 and the top cover 2 facilitates the assembly and maintenance of the equipment. The feeding hopper 4 enables the orderly input of materials. The exhaust pipe 5 works in conjunction with the filter assembly 6 to effectively process materials during the mixing process. The generated dust-laden gas reduces dust emissions. The supporting sleeve 7 provides stable support for the subsequent mixing structure. The driving mechanism drives the mixing spray plate 10 to rotate through the supporting pipe 9. At the same time, the supporting sleeve 7 drives the spiral blade 11 and the mixing scraper 12 to rotate, forming an opposing double spiral mixing structure, which greatly improves the mixing efficiency and uniformity. The mixing spray plate 10 can be connected to the gas through the air inlet pipe 8 and then sprayed out through the spray hole 26 to form an airflow, enhancing the mixing effect. The limiting mechanism ensures that the top cover 2 is firmly connected to the silo 1, preventing loosening during operation. This solves the problems of low mixing efficiency and uneven mixing of fine aggregates with different characteristics in existing cold-mixed recycled fine aggregate mixing devices, as well as the problems of imperfect exhaust dust removal system and serious dust content in exhaust gas.

[0032] To enable the support tube 9 and the support sleeve 7 to rotate in opposite directions, such as Figure 2 and 4 As shown, the drive mechanism includes a motor 14, a drive gear 15, a positive gear disk 16, and a negative gear disk 17. The motor 14 is fixedly connected to the inner side wall of the drive chamber 3. The drive gear 15 is fixedly connected to one end of the motor 14. The positive gear disk 16 is fixedly connected to the wall of the support tube 9, and the negative gear disk 17 is fixedly connected to the wall of the support sleeve 7. The two ends of the drive gear 15 are respectively meshed with the positive gear disk 16 and the negative gear disk 17. By using the motor 14, the positive gear disk 16 and the negative gear disk 17 are simultaneously driven by the drive gear 15, so that the support tube 9 and the support sleeve 7 can rotate in opposite directions. This drives the mixing spray plate 10, the spiral blade 11, and the mixing scraper 12 to form a counter-stirring force field, effectively eliminating the mixing dead zone, improving the mixing uniformity, and making it more adaptable to the processing of fine aggregates with different characteristics.

[0033] To facilitate the disassembly and maintenance of the equipment, such as Figure 1 and 2As shown, the limiting mechanism includes a positioning plate 18, a U-shaped positioning seat 19, a threaded limiting port 20, and a limiting screw 21. The positioning plates 18 are fixedly connected to both side walls of the top cover 2, and the U-shaped positioning seats 19 are fixedly connected to both top ends of the hopper body 1. The positioning plates 18 at both ends are inserted into the corresponding U-shaped positioning seats 19. The side walls of the positioning plates 18 at both ends and the U-shaped positioning seats 19 are provided with corresponding threaded limiting ports 20, and the limiting screws 21 are threadedly connected. By using the insertion and cooperation of the positioning plates 18 and the U-shaped positioning seats 19, and then tightening them by the limiting screws 21, the connection between the top cover 2 and the hopper body 1 is quick and stable, which facilitates the disassembly and maintenance of the equipment, while ensuring the sealing during operation and reducing dust leakage.

[0034] In order to filter the mixed exhaust gas and facilitate cleaning, such as Figure 1-3 As shown, the filter assembly 6 includes a filter chamber 22, with filter packing 23 inside the chamber. An exhaust port filter separation screen 24 is fixedly connected to the top of the filter chamber 22 through an opening, and a collection tank 25 is threadedly connected to the bottom of the filter chamber 22 through a threaded opening. The filter packing 23 is used to perform multi-stage filtration of dust-laden gas, the exhaust port filter separation screen 24 further intercepts fine dust, and the collection tank 25 can collect the dust separated during the filtration process, achieving efficient dust treatment, reducing pollution to the atmosphere and workshop environment, and meeting environmental protection requirements.

[0035] To ensure sufficient contact with fine aggregates and enhance the mixing effect, such as Figure 2 As shown, the mixing spray plate 10 includes multiple hollow plates, each with multiple spray holes 26 on its sidewalls. The hollow plate structure allows additives and other materials to be evenly sprayed into the mixing area through the spray holes 26, ensuring full contact with the fine aggregates and enhancing the mixing effect. This is particularly suitable for processing fine aggregates with different properties, improving mixing uniformity.

[0036] To facilitate the rotation of the limiting screw 21, such as Figure 1 As shown, a rotating handle 27 is fixedly connected to one end of each of the two limit screws 21. The rotating handle 27 allows the operator to quickly tighten or loosen the limit screws 21, thereby improving the efficiency of equipment assembly and disassembly and reducing labor intensity.

[0037] To facilitate control and extend service life, such as Figure 1 and 2 As shown, a control display 28 is fixedly connected to the side wall of the silo body 1. The cavity of the silo body 1 is provided with a corrosion-resistant and non-stick ceramic coating. The control display 28 can be used to monitor and adjust various parameters in the mixing process in real time, such as stirring speed and feed rate, thereby improving the degree of production automation. The corrosion-resistant and non-stick ceramic coating can prevent fine aggregates from adhering to the inner wall of the silo body, reduce material residue, extend the service life of the equipment, and facilitate cleaning and maintenance.

[0038] Working principle:

[0039] When this device is working, the material is fed into the bin 1 through the feed hopper 4. The motor 14 in the drive mechanism runs and drives the drive gear 15 to rotate. Since the drive gear 15 meshes with the positive gear disk 16 and the negative gear disk 17, the support pipe 9 and the support sleeve 7 rotate in opposite directions. The support pipe 9 drives the stirring spray plate 10 to rotate, and the support sleeve 7 drives the spiral blade 11 and the stirring scraper 12 to rotate, forming a double spiral stirring structure. The stirring spray plate 10 is connected to the gas through the air inlet pipe 8 and sprayed through the spray hole 26 to form an airflow. Combined with the stirring action of the spiral blade 11 and the stirring scraper 12, it can efficiently mix fine aggregates with different characteristics, eliminate mixing dead zones, and improve mixing efficiency and uniformity.

[0040] The dust-laden gas generated during the mixing process enters the filter assembly 6 through the exhaust pipe 5. The filter packing 23 performs multi-stage filtration of the gas, and the exhaust port filter separation screen 24 further intercepts fine dust. The separated dust falls into the collection tank 25, achieving efficient dust treatment.

[0041] After mixing is completed, the discharge valve 13 is opened by controlling the display 28 to discharge the uniformly mixed fine aggregate. The limiting mechanism ensures that the top cover 2 and the silo body 1 are firmly connected by the insertion of the positioning plate 18 and the U-shaped positioning seat 19 and the tightening of the limiting screw 21. At the same time, the corrosion-resistant and non-stick ceramic coating prevents the material from adhering to the inner wall of the silo, which facilitates equipment maintenance and cleaning.

[0042] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cold-mixing recycled fine aggregate double-screw mixing device comprising a bin body (1), characterized in that, The top of the hopper (1) is snapped with a top cover (2), the top of the top cover (2) is fixedly connected to a drive chamber (3), one end of the top of the top cover (2) is fixedly connected to a feed hopper (4), the other end of the top of the top cover (2) is fixedly connected to an exhaust pipe (5) through an opening, the side wall of the exhaust pipe (5) is fixedly connected to a filter assembly (6), and a support sleeve (7) is rotatably connected inside the cavity of the top cover (2). An air inlet pipe (8) is fixedly connected to the top of the cavity of the drive chamber (3). A support pipe (9) is rotatably connected to the bottom of the air inlet pipe (8). One end of the support pipe (9) passes through the support sleeve (7) and is fixedly connected to a stirring spray plate (10). Spiral blades (11) are fixedly connected to both ends of the pipe wall of the support sleeve (7). A stirring scraper (12) is fixedly connected to both ends of the top of the pipe wall of the support sleeve (7). A discharge valve (13) is fixedly connected to the bottom of the cavity of the chamber body (1). A drive mechanism is provided in the cavity of the drive chamber (3) and fixedly connected to the support sleeve (7) and the support pipe (9). A limiting mechanism is provided at both ends of the top of the chamber body (1) and fixedly connected to the top cover (2).

2. A cold-recycled fine aggregate double spiral mixing device according to claim 1, characterized in that, The drive mechanism includes a motor (14), a drive gear (15), a spur gear (16), and a reverse gear (17). The motor (14) is fixedly connected to the inner side wall of the drive chamber (3). The drive gear (15) is fixedly connected to one end of the motor (14). The spur gear (16) is fixedly connected to the wall of the support tube (9). The reverse gear (17) is fixedly connected to the wall of the support sleeve (7). The two ends of the drive gear (15) are respectively meshed with the spur gear (16) and the reverse gear (17).

3. A cold-recycled fine aggregate double spiral mixing device according to claim 1, characterized in that, The limiting mechanism includes a positioning plate (18), a U-shaped positioning seat (19), a threaded limiting port (20), and a limiting screw (21). The two side walls of the top cover (2) are fixedly connected with positioning plates (18), and the top of the two ends of the compartment (1) are fixedly connected with U-shaped positioning seats (19). The positioning plates (18) at both ends are inserted into the corresponding U-shaped positioning seats (19). The side walls of the positioning plates (18) and U-shaped positioning seats (19) at both ends are provided with corresponding threaded limiting ports (20), and the limiting screw (21) is threadedly connected.

4. A cold-recycled fine aggregate double spiral mixing device according to claim 1, characterized in that, The filter assembly (6) includes a filter chamber (22), the filter chamber (22) is provided with filter packing (23) inside the cavity, the top of the filter chamber (22) is fixedly connected with an exhaust port filter separation screen (24) through an opening, and the bottom of the filter chamber (22) is threadedly connected with a collection tank (25) through a threaded opening.

5. A cold-recycled fine aggregate double spiral mixing device according to claim 1, characterized in that, The stirring spray plate (10) includes multiple hollow plates, and each side wall is provided with multiple spray holes (26).

6. The cold-mixed recycled fine aggregate double-helix mixing device according to claim 3, characterized in that, One end of each of the limiting screws (21) is fixedly connected to a rotating handle (27).

7. A cold-recycled fine aggregate double spiral mixing device according to claim 2, characterized in that, The side wall of the chamber (1) is fixedly connected to a control display (28), and the cavity of the chamber (1) is provided with a corrosion-resistant and non-stick ceramic coating.

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