An asphalt mixture production asphalt supply device
By using microwave drying equipment and a dust removal system in the asphalt mixture production plant, the pollution and energy consumption problems of the direct-heat drying system were solved, achieving environmentally friendly and efficient aggregate drying and improved bonding performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-19
- Publication Date
- 2026-06-23
AI Technical Summary
Existing asphalt mixture production and asphalt supply equipment pollutes the environment and consumes a lot of energy through direct thermal drying systems. It also causes a lot of dust to adhere to the surface of aggregates, affecting their bonding performance.
Microwave drying equipment is used to heat the aggregates, and combined with a dust collection box and dust removal system, the moisture on the surface of the aggregates is heated by microwaves, and the dust is removed by fans and dust collection bags, so as to achieve an environmentally friendly and efficient drying process.
It reduces drying time and energy consumption, reduces high-temperature flue gas emissions, improves the adhesion between aggregate and asphalt, and ensures construction quality.
Smart Images
Figure CN224394132U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of asphalt production technology, specifically an asphalt supply device for asphalt mixture production. Background Technology
[0002] Asphalt mixture is a composite material, mainly composed of asphalt, coarse aggregate, fine aggregate, and mineral powder, and some also contain polymers and wood cellulose; different structures are formed by mixing these materials of different qualities and quantities, and they have different mechanical properties.
[0003] When constructing small-scale asphalt pavements, a combination of pre-mixed aggregates from the factory and on-site mixing is typically used. The specific process is as follows: First, aggregates of different particle sizes are pre-mixed according to a set ratio at the asphalt mixing plant, and then transported to the construction site. Upon arrival, these pre-mixed aggregates are fed into a mobile asphalt mixing plant for final mixing with heated asphalt binder. This segmented production method ensures accurate material proportions and adapts to the spatial constraints of the construction site, making it particularly suitable for small-scale paving projects such as urban road repairs and residential road surfaces. Secondary on-site mixing ensures that the asphalt mixture is laid at the optimal temperature, thus guaranteeing the quality of the pavement construction.
[0004] Asphalt mixtures need to be kept dry and clean to ensure their adhesion when mixed with asphalt. Existing asphalt supply equipment for asphalt mixture production typically uses direct-fired drying systems, which generate pollutants such as SO2, CO2, and NOx. These systems are also inefficient, with heat loss through flue gas, making them difficult to control and posing a dust explosion hazard. Furthermore, excessive dust adheres to the aggregate surface, which is detrimental to adhesion with asphalt. Utility Model Content
[0005] To address the problems of environmental pollution, high energy consumption, and excessive dust adhesion on aggregate surfaces caused by direct-fired drying of aggregates in existing asphalt mixture production asphalt supply devices, this utility model provides an asphalt supply device for asphalt mixture production.
[0006] This utility model is achieved through the following technical solution:
[0007] An asphalt supply device for producing asphalt mixture includes a base and a hopper. Two discharge plates are rotatably connected to the bottom side wall of the hopper. A telescopic rod is fixedly connected between the two discharge plates. A connecting rod is rotatably connected between the telescopic rod and the discharge plates.
[0008] A horizontal conveyor belt mechanism is installed below the hopper, and a fixed frame is connected and installed on the horizontal conveyor belt mechanism. A microwave drying device is installed inside the fixed frame, and a gas collection hood is installed on the top of the fixed frame.
[0009] The output side of the horizontal conveyor belt mechanism is equipped with a Z-shaped conveyor belt mechanism, and the output side of the Z-shaped conveyor belt mechanism is equipped with a dust collection box. The top of the dust collection box is equipped with a feed inlet corresponding to the output side of the Z-shaped conveyor belt mechanism. Several inclined baffles are provided on the inner wall of the dust collection box. The bottom of the dust collection box is equipped with a discharge outlet on the side away from the feed inlet. Ventilation holes are provided on the two opposite side walls of the dust collection box. A dust collector is connected and installed on the side of the dust collection box. A through hole is provided on the side wall of the dust collector, and a dust collector bag is connected and installed in the through hole. A wind box is connected and installed on the side of the wind box, and a fan is connected and installed on the side of the wind box.
[0010] A further improvement of this utility model is that an auger is rotatably connected and installed at the bottom of the hopper, and a motor for driving the auger to rotate is connected and installed on the outside of the hopper.
[0011] A further improvement of this utility model is that a sand and gravel moisture meter is provided on the side wall of the hopper.
[0012] A further improvement of this invention is that the telescopic rod is a servo-hydraulic controlled hydraulic cylinder.
[0013] A further improvement of this utility model is that a funnel is provided at the top of the hopper.
[0014] A further improvement of this utility model is that an exhaust fan is provided on the top of the gas collection hood.
[0015] A further improvement of this utility model is that a dust baffle is provided on the Z-shaped conveyor belt mechanism.
[0016] A further improvement of this utility model is that a lockable roller is connected and installed on the base frame of the Z-shaped conveyor belt mechanism.
[0017] As can be seen from the above technical solutions, the beneficial effects of this utility model are:
[0018] During use, according to the construction party's requirements, the aggregate, mixed evenly in a certain proportion, is placed in the hopper. The telescopic rod is activated to extend, and the connecting rod drives the two discharge plates to rotate, causing the aggregate to fall between the discharge plates and spread evenly on the horizontal conveyor belt mechanism. The horizontal conveyor belt mechanism conveys the aggregate into the fixed frame. The microwave drying equipment in the fixed frame heats the aggregate with microwaves, causing the moisture on the aggregate to be heated and converted into water vapor under the action of high-frequency electromagnetic waves. The water vapor rises naturally and is discharged through the gas collection hood. As the horizontal conveyor belt mechanism continues to convey the aggregate, the dried aggregate is conveyed to the Z-shaped conveyor belt mechanism for lifting. It enters the dust collection box from the feed port. Under the action of gravity, the aggregate continuously hits and falls back and forth on the baffle, which fully shakes off the dust on the surface of the aggregate. The fan is activated to exhaust air to the outside, allowing air to enter the dust collection box through the ventilation holes. The dust is sucked into the dust collection box and then filtered by the dust collection bag, leaving the dust in the dust collection box. The clean aggregate is discharged from the discharge port. This device dries aggregates using microwave heating equipment. Electromagnetic waves penetrate the aggregates and directly stimulate water molecules to move at high speeds, generating heat through friction. The internal and external moisture levels rise simultaneously, reducing the drying time. There are no high-temperature flue gas emissions, making it more environmentally friendly and reducing energy waste. The device also provides more precise temperature control to prevent aggregates from overheating and pulverizing. The dust collection box and dust removal box ensure that dust on the surface of the dried aggregates is fully shaken off, improving the adhesion between the aggregates and asphalt and enhancing the quality of the asphalt. Attached Figure Description
[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0021] Figure 2 This is a cross-sectional structural diagram of the present invention.
[0022] Figure 3 This is a schematic diagram of a partial cross-sectional structure at the hopper.
[0023] Figure 4 This is a schematic cross-sectional view of the dust removal device.
[0024] In the attached diagram: 1. Base, 2. Hopper, 3. Discharge plate, 4. Telescopic rod, 5. Connecting rod, 6. Horizontal conveyor belt mechanism, 7. Fixed frame, 8. Microwave drying equipment, 9. Gas collection hood, 10. Exhaust fan, 11. Z-type conveyor belt mechanism, 12. Dust box, 13. Feed inlet, 14. Baffle, 15. Discharge outlet, 16. Ventilation hole, 17. Dust collection box, 18. Through hole, 19. Dust collector bag, 20. Air box, 21. Fan, 22. Screwdriver, 23. Motor, 24. Sand and gravel moisture meter, 25. Funnel, 26. Dust baffle plate, 27. Roller. Detailed Implementation
[0025] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.
[0026] like Figure 1-4 As shown, an asphalt supply device for producing asphalt mixture includes a base 1 and a hopper 2. Two discharge plates 3 are rotatably connected to the bottom side wall of the hopper 2. The bottom of the discharge plates 3 is arc-shaped. A telescopic rod 4 is fixedly connected to the wall of the hopper 2 between the two discharge plates 3 by bolts. A connecting rod 5 is rotatably connected between the telescopic rod 4 and the discharge plates 3.
[0027] Below the hopper 2 is a horizontal conveyor belt mechanism 6 driven by a geared motor. A closed fixed frame 7 is connected and installed on the horizontal conveyor belt mechanism 6. Microwave drying equipment 8 is installed inside the fixed frame 7, including a microwave generator, waveguide device, control system and safety protection system. A ventilation duct for heating steam discharge is provided between the microwave drying equipment 8. An inverted cone-shaped gas collection hood 9 is provided on the top of the fixed frame 7.
[0028] The horizontal conveyor belt mechanism 6 has a Z-shaped conveyor belt mechanism 11 driven by a geared motor on its output side. The Z-shaped conveyor belt mechanism 11 has stops perpendicular to the conveyor belt surface, and a baffle to prevent aggregate from falling is provided at the lifting section of the conveyor belt. A vertical dust collection box 12 is provided on the output side of the Z-shaped conveyor belt mechanism 11. A feed inlet 13 is located at the top of the dust collection box 12 corresponding to the output side of the Z-shaped conveyor belt mechanism 11. Several relatively staggered and inclined baffles 14 are provided on the inner wall of the dust collection box 12. The baffles 14 and the inner wall on the opposite side form gaps for aggregate to fall. The baffles 14 form an angle of 30 degrees with the horizontal plane, allowing sufficient time for the aggregate to fall. The bottom of the dust collection box 12 is far from the feed inlet 13. The dust collection box 12 has a discharge port 15 on its side, and an inclined plate is provided at the discharge port 15 to guide the aggregate discharge. The dust collection box 12 has ventilation holes 16 on two opposite side walls perpendicular to the baffle 14. A dust collection box 17 for collecting dust is connected and installed on the side of the dust collection box 12. A circular through hole 18 is provided on the side wall of the dust collection box 17. A cylindrical frame is connected and installed in the through hole 18. A dust collection bag 19 is fitted on the outside of the cylindrical frame. The cylindrical frame is fixed to the outer side wall of the dust collection box 17 by bolts. A wind box 20 is connected and installed on the side of the dust collection box 17. A fan 21 is connected and installed on the side of the wind box 20. The bottom of the dust collection box 17 has a sealable door that can be opened and closed for periodically cleaning the dust inside the dust collection box 17.
[0029] In use, aggregates mixed in a certain proportion are placed into hopper 2 via a conveying device. The telescopic rod 4 is activated to extend, causing one end of connecting rod 5 to descend while the other end rotates, rotating the two discharge plates 3 to the sides to create an opening. The aggregates fall between the discharge plates 3 and are laid flat on the horizontal conveyor belt mechanism 6. The horizontal conveyor belt mechanism 6 conveys the aggregates into a fixed frame 7. The microwave drying device 8 inside the fixed frame 7 microwaves the aggregates, causing the moisture on the aggregates to be converted into water vapor through frictional heating under the action of high-frequency electromagnetic waves. This water vapor rises naturally and is discharged through the gas collection hood 9. The horizontal conveyor belt mechanism 6 continues to convey the dried aggregate to the Z-shaped conveyor belt mechanism 11 for lifting. The aggregate enters the dust collection box 12 from the feed port 13. Under the action of gravity, the aggregate continuously impacts and falls back and forth on the baffle 14, which fully shakes off the dust on the surface of the aggregate. The fan 21 is started to exhaust air to the outside, and a negative pressure is formed inside the air box 20, which allows air to enter the dust collection box 12 through the external ventilation hole 16. The dust is sucked into the dust collection box 17 and then filtered by the dust collection bag 19, leaving the dust in the dust collection box 17. The clean aggregate is discharged from the discharge port 15. This device dries aggregates using microwave heating equipment. Electromagnetic waves penetrate the aggregates and directly stimulate water molecules to move at high speeds, generating heat through friction and simultaneous temperature rise. This reduces the drying time, eliminates high-temperature flue gas emissions, and is more environmentally friendly. It also reduces energy waste, precisely controls the temperature to prevent aggregates from overheating and pulverizing, and the dust collection box 12 and dust removal box 17 ensure that surface dust on the dried aggregates is fully shaken off, improving the adhesion between the aggregates and asphalt and enhancing the quality of the asphalt.
[0030] It should be noted that, in order to ensure the safe operation of the microwave drying equipment 8, magnets should be used to adsorb and remove metal from the aggregate before it enters the microwave drying equipment 8, so as to prevent metal from entering the microwave drying equipment and causing sparks. The dust in the dust collection box 17 should be cleaned regularly and can be recycled as asphalt filler. At the same time, the dust collection bag 19 should be replaced regularly to prevent the dust collection bag 19 from becoming clogged and causing a decrease in dust collection effect.
[0031] The hopper 2 is rotatably connected to the bottom of the hopper 2, and a motor 23 capable of outputting low speed and high torque is connected to the outside of the hopper 2 to drive the auger 22 to rotate. The rotating auger 22 can transfer the aggregate accumulated on both sides to the bottom opening, so that the aggregate is completely discharged, and can prevent the aggregate from arching and affecting the falling. The auger 22 has thick blades and has sufficient strength to agitate the aggregate.
[0032] The hopper 2 is equipped with a sand and gravel moisture meter 24 on its side wall. The LD-100F sand and gravel moisture meter can quickly detect the moisture content of the sand and gravel. The sand and gravel moisture meter 24, located at the outlet, collects the moisture content and transmits the aggregate moisture content signal to the controller. This facilitates the control of the output power of the microwave drying equipment 8, ensuring that the aggregate receives appropriate dewatering power, which is energy-saving and environmentally friendly.
[0033] The telescopic rod 4 is a servo-hydraulic controlled hydraulic cylinder. By analyzing the moisture content detection data, the drying efficiency of the microwave drying equipment 8 is analyzed, and the signal is transmitted to the controller. The controller calculates and precisely controls the extension of the hydraulic telescopic rod 4 to precisely control the opening of the unloading plate 3, so that the aggregate falls onto the horizontal conveyor belt 6 in a certain amount, ensuring the drying efficiency of the aggregate.
[0034] The top of the hopper 2 is equipped with a conical funnel 25. This enlarges the opening of the hopper 2, reducing the possibility of aggregate falling out during addition.
[0035] The top of the gas collection hood 9 is equipped with a motor-driven exhaust fan 10. This can accelerate the dissipation of water vapor, improve drying efficiency, and reduce energy consumption.
[0036] The Z-shaped conveyor belt mechanism 11 is equipped with a dust baffle 26. The dust baffle 26 covers the horizontal conveyor belt mechanism 6 and the Z-shaped conveyor belt mechanism 11, which can prevent the dust raised by the aggregate from polluting the environment when it moves from the horizontal conveyor belt mechanism 6 to the Z-shaped conveyor belt mechanism 11. At the same time, it uses microwave absorbing material to absorb microwaves and prevent the overflowing microwaves from causing harm to the human body.
[0037] The Z-type conveyor belt mechanism 11 has lockable rollers 27 mounted on its base frame. The rollers 27 allow for easy handling of the Z-type conveyor belt mechanism, enabling adjustments to its placement angle based on the actual site conditions, saving production space, and providing a locking mechanism to ensure conveyor belt stability.
[0038] During use, the sand and gravel moisture meter detects the moisture content of the aggregate and transmits the signal to the controller. The controller controls the hydraulic telescopic rod 4 to extend a certain distance according to the output drying power of the microwave drying equipment 8, so that the two unloading plates 3 rotate and open to a certain angle, allowing the aggregate to fall at a certain flow rate and be spread flat on the horizontal conveyor belt mechanism 6, and then be conveyed into the microwave drying equipment 8. The microwave drying equipment 8 emits high-frequency electromagnetic waves, which stimulate water molecules to move at high speed, generate heat and evaporate, and the hot steam is discharged from the gas collection hood 9 under the action of the exhaust fan 10. The dried aggregate enters the Z-shaped conveyor belt mechanism 11 and is lifted into the dust box 12. Through continuous collision with the baffle 14, the dust on the surface of the aggregate is fully shaken off. Then the fan 21 sucks the dust into the dust collection box 17, and it is filtered by the dust collection bag 19 and retained in the dust collection box 17. This device dries aggregates using microwave heating equipment 8, improving drying efficiency, eliminating high-temperature flue gas emissions, making it more environmentally friendly, reducing energy waste, precisely controlling temperature to prevent aggregates from overheating and pulverizing, and using dust collection box 12 and dust removal box 17 to fully shake off surface dust from the dried aggregates, improving the adhesion between the aggregates and asphalt, and improving the quality of the asphalt.
[0039] The controller can be a common PLC controller, such as Schneider Electric M258. The aggregate is automatically dried and dusted by setting a program. When the microwave drying equipment 8 is working, there must be enough aggregate on the conveyor belt. An aggregate detection device is installed in the hopper. Drying is stopped after the aggregate in the hopper is drained to prevent microwave damage to the conveyor belt.
[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An asphalt mixture production asphalt supply device comprising a base (1) and a hopper (2), characterized in that, Two discharge plates (3) are rotatably connected to the bottom side wall of the hopper (2), and a telescopic rod (4) is fixedly connected between the two discharge plates (3). A connecting rod (5) is rotatably connected between the telescopic rod (4) and the discharge plate (3). A horizontal conveyor belt mechanism (6) is provided below the hopper (2), and a fixed frame (7) is connected and installed on the horizontal conveyor belt mechanism (6). A microwave drying device (8) is provided inside the fixed frame (7), and a gas collection hood (9) is provided on the top of the fixed frame (7). The horizontal conveyor belt mechanism (6) is provided with a Z-type conveyor belt mechanism (11) on the output side. The Z-type conveyor belt mechanism (11) is provided with a dust box (12) on the output side. The top of the dust box (12) is provided with a feed inlet (13) corresponding to the output side of the Z-type conveyor belt mechanism (11). Several inclined baffles (14) are provided on the inner wall of the dust box (12). The bottom of the dust box (12) is provided with a discharge port (15) on the side away from the feed inlet (13). Ventilation holes (16) are provided on the two opposite side walls of the dust box (12). A dust collector (17) is connected and installed on the side of the dust box (12). A through hole (18) is provided on the side wall of the dust collector (17). A dust collector bag (19) is connected and installed in the through hole (18). A wind box (20) is connected and installed on the side of the dust collector (17). A fan (21) is connected and installed on the side of the wind box (20).
2. The asphalt supply device for asphalt mixture production according to claim 1, characterized in that, The bottom of the hopper (2) is rotatably connected to an auger (22), and the outside of the hopper (2) is connected to a motor (23) that drives the auger (22) to rotate.
3. The asphalt supply device for asphalt mixture production according to claim 1, characterized in that, A sand and gravel moisture meter (24) is installed on the side wall of the hopper (2).
4. The asphalt supply device for asphalt mixture production according to claim 3, characterized in that, The telescopic rod (4) is a servo-hydraulic controlled hydraulic cylinder.
5. The asphalt supply device for asphalt mixture production according to claim 1, characterized in that, The top of the hopper (2) is equipped with a funnel (25).
6. The asphalt supply device for asphalt mixture production according to claim 4, characterized in that, An exhaust fan (10) is provided on the top of the air collection hood (9).
7. The asphalt supply device for asphalt mixture production according to claim 1, characterized in that, The Z-type conveyor belt mechanism (11) is equipped with a dust baffle (26).
8. The asphalt supply device for asphalt mixture production according to claim 7, characterized in that, The base frame of the Z-type conveyor belt mechanism (11) is connected to lockable rollers (27).