Uniform mixing device for composite modifier

Abstract

The utility model relates to the technical field of asphalt modification, in particular to a composite modifier uniform mixing device which comprises a mixing tank, a stirring device is arranged in the mixing tank and comprises a stirring shaft and a driving motor, and a scattering mechanism is arranged on the upper portion of the stirring shaft. The material scattering mechanism comprises a material storage barrel fixedly connected with the stirring shaft and a material scattering pipe arranged at the bottom of the material storage barrel, the material storage barrel penetrates through the upper wall of the mixing tank, the outer wall of the material storage barrel is rotationally connected with the mixing tank in a sealed mode, a plurality of material scattering openings are formed in the end, located in the mixing tank, of the material storage barrel, and the material scattering openings are formed in the two sides of the material storage barrel and communicate with an inner cavity of the material storage barrel; a circle of material guide ring plate is arranged on the lower portion of the material scattering opening along the outer wall of the material storage barrel, a material scraping shaft is arranged in an inner cavity of the material storage barrel, the lower end of the material scraping shaft is rotationally connected with the bottom wall of the material storage barrel, the upper end of the material scraping shaft is fixedly connected with the outer wall of the mixing tank, and a material scraping spiral piece is fixed to the material scraping shaft and abuts against the inner wall of the material storage barrel. According to the utility model, the accuracy of the feeding amount is improved, and meanwhile, the uniformity of material dispersion is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt modification, in particular to a composite modifier uniform mixing device. Background Art

[0002] In the field of road construction and maintenance, asphalt is an important building material, and its performance directly affects the quality and service life of the road. In order to improve the performance of asphalt, such as enhancing anti-aging, improving anti-rutting ability, and improving temperature stability, modifiers are often added to asphalt. There are many types of asphalt modifiers. In reality, different modifiers are compounded to make composite modifiers to improve the comprehensive effect. In the mixing process of asphalt and composite modifiers, due to the difference in physical properties between modifiers and asphalt, uneven addition ratios, and limitations of mixing processes, the distribution of modifiers in asphalt is often uneven. At present, the mixing of asphalt and composite modifiers is mainly completed by mixing equipment. Although the mixing equipment can mix the modifier with asphalt to a certain extent, due to factors such as the particle size, density, and shape of different modifiers in the composite modifier, as well as the viscosity and temperature characteristics of asphalt, it is difficult to achieve an ideal uniform distribution of the modifier in asphalt. This uneven distribution will seriously affect the performance of asphalt, such as reducing the adhesion of asphalt, increasing the aging rate of asphalt, etc., thereby shortening the service life of the road.

[0003] China Utility Model Patent Authorization Announcement No. CN215610820U proposes a high-viscosity modified asphalt mixing device, including a tank body, a stirring mechanism, a driving mechanism, an asphalt feed pipe and an exhaust pipe. The stirring mechanism is installed at the central axis of the tank body, and the asphalt feed pipe is fixedly connected to one side of the top of the tank body. The stirring mechanism includes a modifier feed mechanism and a stirring blade. The modifier feed mechanism is movably inserted in the top of the tank body, and the stirring blade is fixedly connected to both sides of the modifier feed mechanism. By using the arrangement mode in which the stirring mechanism and the modifier feed mechanism are matched, the modifier receives the centrifugal force and the conical protrusion in the modifier feed mechanism, so that the release area of ​​the modifier is expanded, and the asphalt in contact with the modifier is stirred by the stirring blade, so that the modifier and the asphalt are mixed more fully. In the above structure, the modifier is put into the containing chamber. Since the modifier release tube is arranged at the bottom of the containing chamber, when the modifier is subjected to the centrifugal force, although a part of the modifier will be thrown out from the modifier release tube due to the action of gravity and centrifugal force, some powdered modifiers with poor fluidity in the composite modifier may stick to the inner wall of the containing chamber and be difficult to fall, thus resulting in inaccurate dosage. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a composite modifier uniform mixing device, which can realize uniform spreading of materials and scrape off and deliver the attached materials, thereby improving the accuracy of the feeding amount and the uniformity of the material dispersion.

[0005] The mixing device of the present invention comprises a mixing tank, a feeding port is arranged on the top of the mixing tank, a discharging port is arranged on the bottom of the mixing tank, a stirring device is arranged in the mixing tank, the stirring device comprises a stirring shaft and a driving motor, the lower end of the stirring shaft is connected with the output shaft of the driving motor, a stirring blade is arranged on the stirring shaft, and a spreading mechanism is arranged on the upper part of the stirring shaft, the spreading mechanism comprises a storage barrel fixedly connected with the stirring shaft and a spreading pipe arranged at the bottom of the storage barrel, the storage barrel passes through the upper wall of the mixing tank, the outer wall of the storage barrel is sealed and rotatably connected with the mixing tank, a plurality of spreading ports are arranged at one end of the storage barrel located in the mixing tank, the spreading ports are arranged at both sides of the storage barrel and are communicated with the inner cavity of the storage barrel, a circle of material guiding ring plates is arranged along the outer wall of the storage barrel at the lower part of the spreading port, a scraping shaft is arranged in the inner cavity of the storage barrel, the scraping shaft has a lower end rotatably connected with the bottom wall of the storage barrel, the upper end of the scraping shaft is fixedly connected with the outer wall of the mixing tank, a scraping spiral piece is fixed on the scraping shaft, and the scraping spiral piece is abutted against the inner wall of the storage barrel.

[0006] Preferably, the outer wall of the mixing tank is provided with a jacket, and a heating pipe is provided in the jacket.

[0007] Preferably, an upper cover is detachably fixed to the upper portion of the storage barrel, and the scraper shaft passes through the upper cover and is rotatably connected to the upper cover.

[0008] Preferably, a support frame is provided outside the mixing tank, the support frame is fixed on the outer wall of the top of the mixing tank, and the upper end of the scraper shaft is fixedly mounted on the support frame.

[0009] Preferably, a vent is provided on the top of the mixing tank.

[0010] Preferably, the guide ring plate and the bottom surface of the storage barrel form a truncated cone, and the inner edge of the guide ring plate is higher than the outer edge. This arrangement is more conducive to ensuring that the material falls at an angle.

[0011] Preferably, a material guide groove is provided on the upper surface of the material guide ring plate, and the material guide groove extends from the inner edge to the outer edge of the material guide ring plate in a radial shape.

[0012] Preferably, the stirring blades are arranged at an angle to increase the shear force with the material.

[0013] Preferably, a U-shaped stirring rod is provided at the bottom of the stirring shaft, and both ends of the U-shaped stirring rod are symmetrically arranged relative to the central axis of the stirring shaft. The U-shaped stirring rod is provided with stirring blades. The setting of the U-shaped stirring rod increases the stirring effect of the bottom material.

[0014] Compared with the prior art, the utility model has the following beneficial effects: when the stirring shaft drives the storage barrel to rotate, the scraping shaft inside the storage barrel does not rotate, and at this time the inner wall of the storage barrel rotates relative to the scraping spiral blade, and under the action of the scraping spiral blade, the scraping spiral blade attached to the inner wall of the storage barrel is scraped off, and under the combined action of friction, gravity and the scraping spiral blade, it is sent to the bottom of the storage barrel along the scraping spiral blade, and thrown into the mixing tank from the spreading port under the action of centrifugal force, thereby achieving dispersed spreading, which is beneficial to the uniform dispersion of the composite modifier in the asphalt; at the same time, when the composite modifier material moves along the scraping spiral blade, it also plays a role of further mixing;

[0015] The guide ring can prevent the material from falling too close to the stirring shaft or even sticking to the stirring shaft, making it difficult to disperse. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a side structural schematic diagram of the utility model;

[0018] Figure 3 It is a schematic diagram of the external structure of the storage barrel;

[0019] Figure 4 It is a schematic diagram of the internal structure of the storage barrel;

[0020] In the figure: 1. mixing tank; 2. feed inlet; 3. discharge outlet; 4. stirring shaft; 5. drive motor; 6. stirring blade; 7. storage barrel; 8. spreading port; 9. material guide ring plate; 10. scraper shaft; 11. scraper spiral blade; 12. jacket; 13. upper cover; 14. support frame; 15. vent; 16. material guide trough; 17. U-shaped stirring rod. DETAILED DESCRIPTION

[0021] The present invention will be described clearly and completely below with reference to the accompanying drawings.

[0022] like Figure 1 , Figure 2As shown, the composite modifier uniform mixing device described in the utility model comprises a mixing tank 1, a feeding port 2 and an air vent 15 are arranged on the top of the mixing tank 1, a discharging port 3 is arranged at the bottom of the mixing tank 1, a stirring device is arranged in the mixing tank 1, the stirring device comprises a stirring shaft 4 and a driving motor 5, the lower end of the stirring shaft 4 is connected to the output shaft of the driving motor 5, a stirring blade 6 is arranged on the stirring shaft 4, the stirring blade 6 is arranged obliquely, a spreading mechanism is arranged on the upper part of the stirring shaft 4, the spreading mechanism comprises a storage barrel 7 fixedly connected to the stirring shaft 4 and a spreading pipe arranged at the bottom of the storage barrel 7, the storage barrel 7 passes through the upper wall of the mixing tank 1, and the outer wall of the storage barrel 7 is connected to the mixing tank 1. The mixing tank 1 is sealed and rotatably connected. One end of the material storage barrel 7 located in the mixing tank 1 is provided with a plurality of material spreading ports 8. The material spreading ports 8 are provided on both sides of the material storage barrel 7 and are connected with the inner cavity of the material storage barrel 7. A circle of material guide ring plates 9 are provided along the outer wall of the material storage barrel 7 at the lower part of the material spreading ports 8. The material guide ring plates 9 and the bottom surface of the material storage barrel 7 form a truncated cone, and the inner edge of the material guide ring plates 9 is higher than the outer edge. The inner cavity of the material storage barrel 7 is provided with a scraper shaft 10. The lower end of the scraper shaft 10 is rotatably connected with the bottom wall of the material storage barrel 7. The upper end of the scraper shaft 10 is fixedly connected with the outer wall of the mixing tank 1. The scraper spiral blades 11 are fixed on the scraper shaft 10, and the scraper spiral blades 11 are against the inner wall of the material storage barrel 7. The outer wall of the mixing tank 1 is provided with a jacket 12, and a heating pipe is provided in the jacket 12.

[0023] A U-shaped stirring rod 17 is provided at the bottom of the stirring shaft 4, and the two ends of the U-shaped stirring rod 17 are symmetrically arranged relative to the central axis of the stirring shaft 4. A stirring blade 6 is provided on the U-shaped stirring rod 17, and the stirring blades 6 on the U-shaped stirring rod 17 are staggered with the stirring blades 6 on the stirring shaft 4. The setting of the U-shaped stirring rod 17 increases the stirring effect of the bottom material.

[0024] An upper cover 13 is detachably fixed on the upper part of the storage barrel 7, and the scraper shaft 10 passes through the upper cover 13 and is rotatably connected to the upper cover 13. A support frame 14 is provided outside the mixing tank 1, and the support frame 14 is fixed on the outer wall of the top of the mixing tank 1, and the upper end of the scraper shaft 10 is fixedly installed on the support frame 14.

[0025] like Figure 3 , Figure 4 As shown, a material guide groove 16 is provided on the upper surface of the material guide ring plate 9. The material guide groove 16 extends from the inner edge to the outer edge of the material guide ring plate 9 in a radial shape.

[0026] The working process is as follows: asphalt enters the mixing tank 1 from the feed port 2, the upper cover 13 is opened to load the composite modifier into the storage barrel 7, the drive motor 5 is started, the stirring shaft 4 starts to rotate, driving the storage barrel 7 to rotate, and at the same time, since the scraper shaft 10 is fixed on the support frame 14, the scraper shaft 10 will not rotate. In this way, the inner wall of the storage barrel 7 rotates relative to the scraper spiral blade 11, and the composite modifier attached to the inner wall of the storage barrel 7 is scraped off by the scraper spiral blade 11. Under the action of gravity and friction, the composite modifier moves along the spiral of the scraper spiral blade 11 to the bottom of the storage barrel 7, and then is sprinkled out from the spreading port 8 under the action of centrifugal force, and is guided into the asphalt in the mixing tank 1 under the action of the guide ring plate 9, and then mixed with the asphalt under the stirring of the stirring blade 6.

Claims

1. A composite modifier uniform mixing device, comprising a mixing tank (1), wherein the top of the mixing tank (1) is provided with a feed inlet (2), the bottom of the mixing tank (1) is provided with a discharge outlet (3), and a stirring device is provided in the mixing tank (1), characterized in that: The stirring device comprises a stirring shaft (4) and a driving motor (5), the lower end of the stirring shaft (4) is connected to the output shaft of the driving motor (5), a stirring blade (6) is provided on the stirring shaft (4), and a material spreading mechanism is provided on the upper part of the stirring shaft (4), the material spreading mechanism comprises a material storage barrel (7) fixedly connected to the stirring shaft (4) and a material spreading pipe provided at the bottom of the material storage barrel (7), the material storage barrel (7) passes through the upper wall of the mixing tank (1), the outer wall of the material storage barrel (7) is sealed and rotatably connected to the mixing tank (1), and one end of the material storage barrel (7) located in the mixing tank (1) is provided with A plurality of material spreading ports (8) are provided on both sides of the material storage barrel (7) and are communicated with the inner cavity of the material storage barrel (7). A circle of material guide ring plates (9) are provided at the lower part of the material spreading ports (8) along the outer wall of the material storage barrel (7). A scraper shaft (10) is provided in the inner cavity of the material storage barrel (7). The lower end of the scraper shaft (10) is rotatably connected to the bottom wall of the material storage barrel (7), and the upper end of the scraper shaft (10) is fixedly connected to the outer wall of the mixing tank (1). A scraper spiral blade (11) is fixed on the scraper shaft (10), and the scraper spiral blade (11) abuts against the inner wall of the material storage barrel (7).

2. The composite modifier uniform mixing device according to claim 1, characterized in that: The outer wall of the mixing tank (1) is provided with a jacket (12), and a heating pipe is provided in the jacket (12).

3. The composite modifier uniform mixing device according to claim 1, characterized in that: An upper cover (13) is detachably fixed to the upper part of the storage barrel (7), and the scraper shaft (10) passes through the upper cover (13) and is rotatably connected to the upper cover (13).

4. The composite modifier uniform mixing device according to claim 1, characterized in that: A support frame (14) is provided outside the mixing tank (1), the support frame (14) is fixed on the top outer wall of the mixing tank (1), and the upper end of the scraper shaft (10) is fixedly mounted on the support frame (14).

5. The composite modifier uniform mixing device according to claim 1, characterized in that: The top of the mixing tank (1) is provided with an air release port (15).

6. The composite modifier uniform mixing device according to claim 1, characterized in that: The material guide ring plate (9) and the bottom surface of the material storage barrel (7) form a truncated cone, and the inner edge of the material guide ring plate (9) is higher than the outer edge.

7. The composite modifier uniform mixing device according to claim 1, characterized in that: A material guide groove (16) is provided on the upper surface of the material guide ring plate (9), and the material guide groove (16) extends from the inner edge to the outer edge of the material guide ring plate (9) in a radial shape.

8. The composite modifier uniform mixing device according to claim 1, characterized in that: The stirring blade (6) is arranged at an inclination.

9. The composite modifier uniform mixing device according to claim 1, characterized in that: A U-shaped stirring rod (17) is provided at the bottom of the stirring shaft (4), two ends of the U-shaped stirring rod (17) are symmetrically arranged relative to the central axis of the stirring shaft (4), and a stirring blade (6) is provided on the U-shaped stirring rod (17).

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