Premixing system for preparing modified asphalt
By crushing and continuously conveying the modifier, combined with a double-layer mixing tank, a heat transfer oil circulation system, and PLC control, the problems of uneven dispersion, discontinuous conveying, and inaccurate metering of the modifier in modified asphalt production have been solved, achieving efficient and uniform modified asphalt production.
Patent Information
- Application Number
- CN202520334659.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-02-28
Smart Images
Figure CN223777498U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of asphalt production, and more specifically, to a premix system for preparing modified asphalt. Background Technology
[0002] Asphalt, as an important road construction and waterproofing material, is widely used in highways, bridges, airport runways, and roof waterproofing projects. However, traditional asphalt materials have certain deficiencies in high-temperature stability, low-temperature crack resistance, and aging resistance, making it difficult to meet the demands of modern transportation and construction industries for high-performance asphalt materials. Therefore, modified asphalt has emerged. By adding polymers (such as SBS), rubber powder, anti-stripping agents, fibers, and other modifiers to asphalt, its overall performance can be effectively improved, extending its service life.
[0003] In the production of modified asphalt, the premixing of modifiers is a crucial step. Traditional modified asphalt production typically involves adding modifiers to the base asphalt manually or using simple mechanical methods, and then dispersing them through stirring.
[0004] However, manual or simple mechanical methods of adding modifiers have at least the following technical problems: the modifier particles are large and unevenly dispersed; some modifiers (such as SBS) are usually supplied in granular or block form, which are difficult to dissolve quickly when added directly to asphalt, affecting the modification effect; material conveying is discontinuous and prone to blockage; during the conveying process, the irregular shape or specific gravity of the modifier can easily lead to poor conveying or blockage, affecting production stability; inaccurate metering affects product quality; the addition ratio of modifiers needs to be strictly controlled, and if the metering error is too large, it will affect the performance of the modified asphalt, leading to unstable construction quality; the mixing effect is limited and energy consumption is high; traditional mixing processes are often energy-intensive and time-consuming, and it is difficult to ensure the uniformity of mixing, affecting production efficiency. Utility Model Content
[0005] To overcome the shortcomings of the prior art, such as the difficulty in quickly dissolving modifiers when added to asphalt, this invention provides a premix system for preparing modified asphalt.
[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:
[0007] A premix system for preparing modified asphalt includes a crushing device, a feeding mechanism, a lifting mechanism, a mixing device, and a control system.
[0008] The crushing device has a first feeding port at the upper end and a first discharging port at the lower end; the second feeding port of the feeding mechanism is located directly below the first discharging port.
[0009] The second discharge port of the feeding mechanism is correspondingly provided with the third feeding port at the bottom of the lifting mechanism; the third discharge port at the top of the lifting mechanism is connected to the mixing device through a conveying pipe, and a spiral guide vane is provided inside the conveying pipe;
[0010] The control system is electrically connected to the crushing device, the feeding mechanism, the lifting mechanism, and the mixing device.
[0011] Furthermore, the crushing device includes a crushing chamber and crushing rollers arranged in parallel inside it;
[0012] The crushing chamber is provided with a first feeding port at the top and a first discharging port at the bottom;
[0013] The crushing roller includes an active crushing roller and a driven crushing roller that is rolled and connected to the active crushing roller; the active crushing roller is connected to a first drive motor through a reducer, and the distance between the two rollers is adjusted by a hydraulic adjustment mechanism.
[0014] Furthermore, the surface of the crushing roller is uniformly arranged with staggered crushing teeth.
[0015] Furthermore, a screen is provided below the first discharge port of the crushing device, and the screen aperture is 10-30mm.
[0016] Preferably, the screen is inclined.
[0017] Furthermore, the feeding mechanism is a screw feeder, including a lifting cylinder. A rotary motor is fixedly installed at one end of the lifting cylinder, and an auger is installed in the inner cavity. The output end of the rotary motor is rotatably connected to one end of the auger through a coupling.
[0018] Furthermore, the lifting mechanism includes a housing, inside which is provided an annular conveyor belt, on which a plurality of bucket-type hoppers are fixedly installed at uniform intervals;
[0019] After the material is discharged from the second discharge port of the feeding mechanism, it enters the bucket hopper through the third feeding port of the lifting mechanism; the bucket hopper conveys the material vertically to the third discharge port at the top of the lifting mechanism via the annular conveyor belt;
[0020] The top of the lifting mechanism is equipped with a drive roller, and the bottom is equipped with a driven roller and a counterweight tensioning device; the third feeding port of the lifting mechanism is also equipped with an infrared material level sensor for sensing the falling height of the material.
[0021] Furthermore, the mixing device has a double-layer mixing tank structure, with the inner layer made of stainless steel and the outer layer provided with an insulation layer for maintaining the temperature of the base asphalt.
[0022] The mixing device is equipped with a vertically arranged stirring shaft, on which several sets of staggered stirring blades are mounted; the stirring shaft is connected to a second drive motor through a reducer.
[0023] The mixing device is surrounded by heat-conducting oil coils on its inner wall.
[0024] Preferably, the installation angle of the stirring blade is 30°-60°.
[0025] Furthermore, the top of the mixing device is also integrated with temperature and pressure sensors to monitor temperature and pressure changes during the mixing process inside the mixing device.
[0026] Furthermore, a modifier metering chamber is provided on the top of the mixing device.
[0027] Preferably, the modifier metering chamber is equipped with a weighing sensor and a flow control device.
[0028] More preferably, the flow control device includes a mass flow meter or a volumetric flow meter to control the amount of modifier added.
[0029] Furthermore, the control system includes a PLC control module, a data acquisition module, and a remote monitoring module. The PLC control module is electrically connected to the crushing device, the feeding mechanism, the lifting mechanism, the mixing device, and the modifier metering chamber.
[0030] The data acquisition module is used to collect equipment operating parameters; the remote monitoring module is used to realize remote control and data analysis of the system.
[0031] Compared with the prior art, the beneficial effects of this utility model's technical solution are:
[0032] This utility model relates to the field of asphalt production, and more specifically, to a premix system for preparing modified asphalt, comprising a crushing device, a feeding mechanism, a lifting mechanism, a mixing device, and a central control unit. The system first crushes the modifier to reduce its particle size, facilitating subsequent conveying and mixing. Then, the feeding and lifting mechanisms ensure continuous material conveying, preventing blockages. During the mixing stage, a double-layer insulated mixing tank combined with a heat-conducting oil circulation system ensures thorough integration of the modifier and base asphalt, improving production efficiency and product quality. Furthermore, the central control unit integrates PLC control, data acquisition, and remote monitoring functions, enabling real-time monitoring and adjustment of various stages such as crushing, conveying, and mixing, further optimizing the production process and improving automation levels.
[0033] The technical solution of this utility model improves the overall processing efficiency, conveying stability and mixing uniformity of modifiers in the production process of modified asphalt. At the same time, it greatly reduces human intervention and errors through automated control, making production more efficient, intelligent and environmentally friendly. Attached Figure Description
[0034] 1. Crushing device; 101. Crushing chamber; 1011. First feed inlet; 1012. First discharge outlet; 102. Crushing roller; 1021. Driven crushing roller; 1022. Driven crushing roller; 103. Screen;
[0035] 2. Feeding mechanism; 201. Second feeding port; 202. Second discharging port; 201. Lifting cylinder; 202. Rotary motor; 203. Screwdriver;
[0036] 3. Lifting mechanism; 301. Third feeding port; 302. Machine casing; 303. Circular conveyor belt; 304. Bucket hopper; 305. Third discharge port; 306. Drive roller; 307. Driven roller; 308. Counterweight tensioning device;
[0037] 4. Mixing device; 401. Stirring shaft; 402. Stirring blades; 403. Second drive motor;
[0038] 5. Material conveying pipe.
[0039] Figure 1 This is an overall schematic diagram of the asphalt premixing system according to an embodiment of the present invention;
[0040] Figure 2 This is a simplified mechanical diagram of the crushing device according to an embodiment of the present invention;
[0041] Figure 3 This is a simplified mechanical diagram of the feeding mechanism in an embodiment of the present invention;
[0042] Figure 4 This is a schematic diagram of the upper structure of the lifting mechanism according to an embodiment of the present utility model;
[0043] Figure 5 This is a schematic diagram of the lower structure of the lifting mechanism in an embodiment of this utility model. Detailed Implementation
[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this application. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the described embodiments without creative effort are within the scope of protection of this application.
[0045] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0046] Example 1
[0047] like Figure 1-3 As shown, this embodiment discloses a premix system for preparing modified asphalt, including a crushing device 1, a feeding mechanism 2, a lifting mechanism 3, a mixing device 4, and a control system.
[0048] The crushing device 1 has a first feeding port 1011 at the upper end and a first discharge port 1012 at the lower end; the feeding mechanism 2 has a second feeding port 201 directly below the first discharge port 1012.
[0049] The second discharge port 202 of the feeding mechanism 2 is correspondingly set with the third feeding port 301 at the bottom of the lifting mechanism 3;
[0050] The third discharge port 305 at the top of the lifting mechanism 3 is connected to the mixing device 4 through the conveying pipe 5, and the conveying pipe 5 is equipped with a spiral guide plate.
[0051] After the modifier is unpacked and crushed by the crushing device 1, it is lifted to a certain height by the feeding mechanism 2 and the lifting mechanism 3, and then transported to the mixing device 4 through the spiral guide plate in the conveying pipe 5 to premix with the base asphalt.
[0052] The control system is electrically connected to the crushing device 1, the feeding mechanism 2, the lifting mechanism 3, and the mixing device 4, respectively.
[0053] The crushing device 1 includes a crushing chamber 101 and crushing rollers 102 arranged in parallel inside it;
[0054] The crushing chamber 101 has a first feeding port 1011 at the top and a first discharging port 1012 at the bottom;
[0055] The crushing roller 102 includes an active crushing roller 1021 and a driven crushing roller 1022 that is rolled and connected to the active crushing roller 1021. The active crushing roller 1021 is connected to a first drive motor via a reducer, and the driven crushing roller 1022 adjusts the distance between the two rollers via a hydraulic adjustment mechanism. The surface of the crushing roller 102 is uniformly arranged with staggered crushing teeth. By setting the active crushing roller 1021 and the driven crushing roller 1022, and uniformly arranging staggered crushing teeth on the surfaces of the two rollers, efficient crushing of large modifiers can be achieved. The modifier is subjected to compression and shearing when passing between the rollers, forming granular or smaller block materials, which helps the subsequent conveying and mixing processes to proceed smoothly.
[0056] Below the first discharge port 1012 of the crushing device 1, a screen 103 is also provided. The screen 103 is inclined relative to the first discharge port 1012, and the screen aperture of the screen 103 is 10-30mm. The inclined screen can remove materials with excessively large particle sizes, allowing only materials that meet the requirements to enter the next conveying device, ensuring the uniformity and stability of the overall particle size. The inclined screen setting also prevents materials from accumulating or clogging at the discharge port, improving operational stability.
[0057] A modifier metering chamber is installed at the top of the mixing unit 4. This chamber is equipped with a weighing sensor and a flow control device, including a mass flow meter or a volumetric flow meter, to control the amount of modifier added. The top-mounted metering chamber, through the weighing sensor and flow control device (mass flow meter or volumetric flow meter), achieves precise control of the modifier addition amount, avoiding fluctuations in asphalt performance caused by inaccurate modifier addition ratios, and improving product quality consistency.
[0058] The control system includes a PLC control module, a data acquisition module, and a remote monitoring module. The PLC control module is connected to the crushing device 1, the feeding mechanism 2, the lifting mechanism 3, the mixing device 4, and the modifier metering chamber. The data acquisition module collects equipment operating parameters in real time through multiple sensors installed in each device within the control system. These parameters include the modifier addition amount in the crushing device 1, the position markers of each bucket in the lifting mechanism 3 during the lifting process, and the temperature and pressure parameters, material weight parameters, mixing time parameters, and the weight of the mixed asphalt output in the mixing device 4. The remote monitoring module enables remote control and data analysis of the system. The PLC control module can precisely control the equipment's operating status according to preset parameters, reducing errors caused by human operation and improving production efficiency. The data acquisition module collects equipment operating parameters in real time, providing data support for fault diagnosis and process optimization. The remote monitoring module supports remote control and data analysis functions, facilitating centralized monitoring and adjustment of the production process by management personnel, achieving intelligent and refined production management.
[0059] Example 2
[0060] like Figure 1-5 As shown, this embodiment discloses a premix system for preparing modified asphalt, including a crushing device 1, a feeding mechanism 2, a lifting mechanism 3, a mixing device 4, and a control system.
[0061] The crushing device 1 has a first feeding port 1011 at the upper end and a first discharge port 1012 at the lower end; the feeding mechanism 2 has a second feeding port 201 directly below the first discharge port 1012.
[0062] The second discharge port 202 of the feeding mechanism 2 is correspondingly set with the third feeding port 301 at the bottom of the lifting mechanism 3;
[0063] The third discharge port 305 at the top of the lifting mechanism 3 is connected to the mixing device 4 through the conveying pipe 5, and the conveying pipe 5 is equipped with a spiral guide plate.
[0064] After being unpacked and crushed by the crushing device 1, the modifier is lifted to a certain height by the feeding mechanism 2 and the lifting mechanism 3, and then conveyed to the mixing device 4 through the spiral guide vanes inside the conveying pipe 5 to premix with the base asphalt. The spiral guide vane design inside the conveying pipe 5 guides the material to flow evenly during the conveying process, avoiding material accumulation or blockage in the pipe, improving conveying efficiency and flow stability, while maintaining a uniform particle size distribution of the modifier, providing a stable feed for subsequent mixing stages.
[0065] The control system is electrically connected to the crushing device 1, the feeding mechanism 2, the lifting mechanism 3, and the mixing device 4, respectively.
[0066] The feeding mechanism 2 is a screw feeder, including a lifting cylinder 203. A rotary motor 204 is fixedly installed at one end of the lifting cylinder 203, and an auger 205 is installed in the inner cavity. The output end of the rotary motor 204 is rotatably connected to one end of the auger 205 through a coupling.
[0067] The lifting mechanism 3 includes a housing 302, within which a ring conveyor belt 303 is installed. Multiple evenly spaced buckets 304 are fixedly mounted on the ring conveyor belt 303. Material exits from the second discharge port 202 of the feeding mechanism 2 and enters the buckets 304 via the third feeding port 301 of the lifting mechanism 3. The buckets 304 then vertically transport the material via the ring conveyor belt 303 to the third discharge port 305 at the top of the lifting mechanism 3. The use of a ring conveyor belt structure with the buckets 304 fixedly mounted on it effectively achieves vertical conveying, significantly reducing the floor space required and adapting to production site space constraints.
[0068] The lifting mechanism 3 is equipped with a drive roller 306 at the top and a driven roller 307 and a counterweight tensioning device 308 at the bottom. The drive motor power output end of the lifting mechanism 3 at the top is connected to the counterweight tensioning device 308 in conjunction with the drive motor. The driven tensioning wheel of the counterweight tensioning device 308 is rotatably connected to the rotating shaft of the drive roller 306. This tensioning structure effectively ensures the stable operation of the circular conveyor belt, reduces belt deviation, and improves conveying efficiency and reliability. An infrared level sensor for sensing the material's falling height is also installed at the third feeding port 301 of the lifting mechanism 3.
[0069] Example 3
[0070] like Figure 1-5 As shown, this embodiment discloses a premix system for preparing modified asphalt, including a crushing device 1, a feeding mechanism 2, a lifting mechanism 3, a mixing device 4, and a control system.
[0071] The crushing device 1 has a first feeding port 1011 at the upper end and a first discharge port 1012 at the lower end; the feeding mechanism 2 has a second feeding port 201 directly below the first discharge port 1012.
[0072] The second discharge port 202 of the feeding mechanism 2 is correspondingly set with the third feeding port 301 at the bottom of the lifting mechanism 3;
[0073] The third discharge port 305 at the top of the lifting mechanism 3 is connected to the mixing device 4 through the conveying pipe 5, and the conveying pipe 5 is equipped with a spiral guide plate. After the modifier is unpacked and crushed by the crushing device 1, it is lifted to a certain height by the feeding mechanism 2 and the lifting mechanism 3, and then conveyed to the mixing device 4 through the spiral guide plate in the conveying pipe 5 to premix with the base asphalt. The control system is electrically connected to the crushing device 1, the feeding mechanism 2, the lifting mechanism 3 and the mixing device 4 respectively.
[0074] The mixing device 4 is a double-layered mixing tank structure. The inner layer is made of stainless steel, and the outer layer has an insulation layer to maintain the temperature of the base asphalt. A heat-conducting oil coil is arranged around the inner wall of the inner layer of the mixing device 4. The viscosity of the base asphalt and the performance of the modifier are greatly affected by temperature. This embodiment uses a double-layered mixing tank with an insulation layer to maintain the temperature of the base asphalt and modifier during mixing. Continuous temperature control is provided through the heat-conducting oil coil on the inner wall of the inner layer, which can maintain a suitable temperature for the base asphalt and modifier during the mixing process, avoiding uneven mixing or degradation of the modifier performance due to temperature fluctuations.
[0075] The mixing device 4 has a vertically arranged stirring shaft 401 inside, and several sets of staggered stirring blades 402 are installed on the stirring shaft 401; the installation angle of the stirring blades is 30°-60°; the stirring shaft 401 is connected to the second drive motor 403 through a reducer; the connection between the stirring shaft 401 and the second drive motor 403 through the reducer effectively reduces the high speed of the drive motor, while providing greater torque, ensuring stable operation of the stirring process, and maintaining sufficient power output even under the stirring conditions of high viscosity mixtures.
[0076] The mixing blades 402 are arranged in several staggered groups to avoid the mixing dead zones caused by unidirectional mixing. This helps to mix the materials in the entire mixing chamber in all directions, further improving the dispersion uniformity of the modifier and the base asphalt. The installation angle is designed to be 30°-60°, which can generate sufficient thrust and shear force during the mixing process. On the one hand, the tilt angle can guide the material to move from bottom to top, forming convection mixing. On the other hand, the large shear force can effectively break up the insufficiently dispersed modifier agglomerates, promote their deep integration with the base asphalt, and improve the performance of the modified asphalt.
[0077] The top of the mixing unit 4 also integrates temperature and pressure sensors to monitor temperature and pressure changes during the mixing process. The temperature sensor monitors the material temperature inside the mixing unit 4 in real time, ensuring the mixing process remains within the optimal temperature range for modified asphalt. This prevents problems such as insufficient dissolution of the modifier due to excessively low temperatures, or aging of the base asphalt or decomposition of the modifier due to excessively high temperatures. The pressure sensor monitors pressure changes within the mixing chamber, especially during the mixing of high-viscosity materials. When the pressure abnormally increases, it can promptly trigger alarms or control programs to prevent equipment overload and improve system safety and stability.
[0078] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A premix system for preparing modified asphalt, characterized in that, It includes a crushing device (1), a feeding mechanism (2), a lifting mechanism (3), a mixing device (4), and a control system; The crushing device (1) has a first feeding port (1011) at its upper end and a first discharge port (1012) at its lower end; the second feeding port (201) of the feeding mechanism (2) is located directly below the first discharge port (1012); The second discharge port (202) of the feeding mechanism (2) is correspondingly provided with the third feeding port (301) at the bottom of the lifting mechanism (3); the third discharge port (305) at the top of the lifting mechanism (3) is connected to the mixing device (4) through the conveying pipe (5), and the conveying pipe (5) is provided with a spiral guide plate; The control system is electrically connected to the crushing device (1), the feeding mechanism (2), the lifting mechanism (3), and the mixing device (4), respectively.
2. The premix system for preparing modified asphalt according to claim 1, characterized in that, The crushing device (1) includes a crushing chamber (101) and crushing rollers (102) arranged in parallel inside the chamber; The crushing chamber (101) is provided with a first feeding port (1011) at the top and a first discharging port (1012) at the bottom; The crushing roller (102) includes an active crushing roller (1021) and a driven crushing roller (1022) that is rolled and connected to the active crushing roller (1021); the active crushing roller (1021) is connected to the first drive motor through a reducer, and the driven crushing roller (1022) adjusts the distance between the two rollers through a hydraulic adjustment mechanism.
3. The premix system for preparing modified asphalt according to claim 2, characterized in that, The surface of the crushing roller (102) is uniformly arranged with staggered crushing teeth.
4. The premix system for preparing modified asphalt according to claim 1, characterized in that, The crushing device (1) is further provided with a screen (103) below the first discharge port (1012), and the screen hole diameter of the screen (103) is 10-30mm.
5. The premix system for preparing modified asphalt according to claim 1, characterized in that, The feeding mechanism (2) is a screw feeder, including a lifting cylinder (203). A rotary motor (204) is fixedly installed at one end of the lifting cylinder (203), and an auger (205) is installed in the inner cavity. The output end of the rotary motor (204) is rotatably connected to one end of the auger (205) through a coupling.
6. The premix system for preparing modified asphalt according to claim 1, characterized in that, The lifting mechanism (3) includes a housing (302), and an annular conveyor belt (303) is provided inside the housing (302). Multiple buckets (304) are fixedly installed on the annular conveyor belt (303) at uniform intervals. After the material is discharged from the second discharge port (202) of the feeding mechanism (2), it enters the bucket hopper (304) along the third feeding port (301) of the lifting mechanism (3); the bucket hopper (304) conveys the material vertically to the third discharge port (305) at the top of the lifting mechanism (3) via the annular conveyor belt (303); The top of the lifting mechanism (3) is provided with a drive roller (306) and a counterweight tensioning device (308), and the bottom is provided with a driven roller (307); the third feeding port (301) of the lifting mechanism (3) is also provided with an infrared material level sensor for sensing the falling height of the material.
7. The premix system for preparing modified asphalt according to claim 1, characterized in that, The mixing device (4) has a double-layer mixing tank structure, with an outer layer for maintaining the temperature of the base asphalt; the inner wall of the mixing device (4) is surrounded by heat-conducting oil coils. The mixing device (4) has a vertically arranged stirring shaft (401) inside, and several sets of staggered stirring blades (402) are installed on the stirring shaft (401); the stirring shaft (401) is connected to the second drive motor (403) through a reducer.
8. The premix system for preparing modified asphalt according to claim 1, characterized in that, The top of the mixing device (4) is also equipped with a temperature sensor and a pressure sensor to monitor the temperature and pressure changes during the mixing process inside the mixing device (4).
9. The premix system for preparing modified asphalt according to claim 1, characterized in that, The top of the mixing device (4) is provided with a modifier metering chamber.
10. The premix system for preparing modified asphalt according to claim 9, characterized in that, The control system includes a PLC control module, a data acquisition module and a remote monitoring module. The PLC control module is connected to the crushing device (1), the feeding mechanism (2), the lifting mechanism (3), the mixing device (4) and the modifier metering chamber.