Mixing device

Abstract

The utility model discloses a mixing device, which relates to the technical field of fiber asphalt mixture mixing, and comprises a mixing pot body and a wind tunnel bin, a mixing blade is arranged in the mixing pot body, and the mixing blade rotates around a rotating shaft in the mixing pot body; a cavity is formed in the wind tunnel bin and comprises an expanding section, a constant section and a shrinking section which are sequentially connected and communicated in the first direction, the section, perpendicular to the first direction, of the expanding section is gradually increased in the first direction, and the section, perpendicular to the first direction, of the constant section is constant. The section, perpendicular to the first direction, of the shrinking section is gradually decreased in the first direction, a first opening is formed in the expanding section, a second opening is formed in the constant section, a third opening is formed in the shrinking section, the first opening is connected with an air supply device and conveys air into the cavity, and the second opening is used for adding fibers into the cavity; the third opening is communicated with the mixing pot body through a pipeline, and the fibers can enter the mixing pot body through the pipeline, so that the structure of the mixing device can be simplified.

Description

Technical Field

[0001] This utility model relates to the field of fiber asphalt mixture mixing technology, and in particular to a mixing device. Background Technology

[0002] Fiber-reinforced asphalt mixtures are favored by many practitioners due to their asphalt adsorption and crack-resistant properties, and have been widely used in road construction projects across various regions. However, in the indoor testing phase, when dry-mixing asphalt mixtures are prepared, preheated aggregates are added to the mixing pot first, and then all the fibers are poured into the pot. Insufficient mixing can easily cause the fibers to clump together. According to existing research, clumped fibers create weak stress surfaces, which is detrimental to improving the performance of the asphalt mixture. Therefore, it is necessary to fully disperse the fibers in the mixing pot to improve the performance of the asphalt mixture. Although there are existing technologies that pre-dispersettle the fibers before adding them to the mixing pot to improve the degree of fiber dispersion in the mixture, such as the fiber-reinforced asphalt concrete mixing device provided in Chinese patent application (CN117468301A), which disperses the fibers by adding them between densely distributed dispersing needles and dispersing them through the relative displacement between the dispersing needles, this type of fiber dispersion has a complex structure and is difficult to process. Summary of the Invention

[0003] The purpose of this invention is to provide a mixing device to solve the problems existing in the prior art and to simplify the structure of the mixing device.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a mixing device, comprising: a mixing pot body and a wind tunnel chamber. The mixing pot body has an opening for adding materials into the mixing pot body. A stirring blade is disposed inside the mixing pot body and rotates around a rotation axis within the mixing pot body. The wind tunnel chamber has a cavity for fluid flow, comprising an expanding section, a constant section, and a contracting section sequentially connected and communicating in a first direction. The cross-section of the expanding section perpendicular to the first direction gradually increases in size in the first direction, and the cross-section of the constant section perpendicular to the first direction... The section of the shrinking segment, perpendicular to the first direction, gradually decreases in size along the first direction. The expanding segment has a first opening communicating with the outside, the constant segment has a second opening communicating with the outside, and the shrinking segment has a third opening communicating with the outside. The first opening is connected to an air supply device, which can supply gas into the cavity through the first opening. The second opening is used to add fibers into the cavity. The third opening is connected to the mixing pot body through a pipe, and the fibers can enter the interior of the mixing pot body through the pipe.

[0006] In some embodiments, the mixing device further includes a first storage bin, which is disposed above the mixing pot. The first storage bin is used to hold asphalt and has a first feeding port and a first discharging end. The first discharging end is provided with a first electrically controlled valve and is located above the opening of the pot. The asphalt can flow into the interior of the mixing pot through the first discharging end.

[0007] In some embodiments, the mixing device further includes a second storage silo for holding the fibers. The second storage silo has a second feed port and a second discharge port. The second discharge port is connected to the constant section. A second electrically controlled valve is provided at the second discharge port. The fibers can enter the wind tunnel chamber from the second discharge port through the second opening.

[0008] In some embodiments, the mixing apparatus further includes an information collection device and a processor. The information collection device is disposed above the opening of the pot body. The processor is signal-connected to the mixing pot body, the information collection device, the first electrically controlled valve, and the second electrically controlled valve. The information collection device is used to acquire image information of the fibers contained in the mixing pot body and transmit the image information to the processor.

[0009] In some embodiments, the information collection device includes a high-temperature resistant camera.

[0010] In some embodiments, a first heating device is provided on the first storage silo, the first heating device being used to heat the asphalt, and the first heating device being signal-connected to the processor.

[0011] In some embodiments, the end of the pipeline is a heat-conducting pipe body, and a third heating device is provided on the heat-conducting pipe body. The third heating device is used to heat the fibers inside the heat-conducting pipe body, and the third heating device is signal-connected to the processor.

[0012] In some embodiments, the mixing device further includes a mixing chamber, with the mixing pot body, the first storage bin, the information collection device, and the processor all disposed inside the mixing chamber. A support plate is provided at the upper part of the mixing chamber, and a mixing pot lid is fixed to the lower surface of the support plate. The mixing pot lid has an opening at the bottom. The first storage bin and the information collection device are both fixed above the support plate. The first discharge end and one end of the information collection device both extend through the support plate into the interior of the mixing pot lid. The pipeline extends through the side wall of the mixing chamber and the support plate into the interior of the mixing pot lid. A lifting structure is provided at the lower part of the mixing chamber. The output end of the lifting structure is connected to the mixing pot body. The mixing pot body can move up and down under the action of the lifting structure. When the mixing pot body moves upward, the mixing pot lid can extend into the opening of the pot body and close the opening. When the mixing pot body moves downward, the mixing pot lid can detach from the opening of the pot body.

[0013] In some embodiments, a fourth heating device is provided on the mixing pot body, which is used to heat the mixing pot body and thus heat the mixture inside the mixing pot body. The fourth heating device is signal-connected to the processor.

[0014] In some embodiments, a CNC screen is provided on the outside of the mixing tank. The CNC screen is signal-connected to the processor and is used to display and control relevant parameters of the mixing device.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] The mixing device provided by this utility model features a wind tunnel chamber with a cross-section that gradually increases and then decreases in the direction of the internal cavity, resulting in a locally variable cross-section design that is narrow at both ends and wide in the middle. This design allows for a gradual increase and decrease in wind speed. The relatively slow wind speed inside the wind tunnel chamber ensures that the material entering the chamber has sufficient time to disperse, effectively pre-dispersing the fibers and making them easier to disperse when mixed with asphalt. Furthermore, the connection between the wind tunnel chamber and the air supply device allows for easier adjustment of the fiber conveying speed. The wind tunnel chamber has a simple structure, and the fiber pre-dispersion can be achieved simply by blowing air into the chamber, thus simplifying the structure of the mixing device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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.

[0018] Figure 1 This is a schematic diagram of the mixing device in the embodiments provided by this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the mixing box in the embodiments provided by this utility model.

[0020] In the diagram: 1-Mixing pot body; 11-Stirring blades; 2-Wind tunnel chamber; 21-Air supply device; 22-Pipeline; 23-Third heating device; 3-First storage bin; 31-First heating device; 32-First discharge end; 33-First electrically controlled valve; 4-Second storage bin; 41-Second feeding port; 42-Second discharge port; 43-Second electrically controlled valve; 5-High temperature resistant camera; 6-Mixing box; 61-Bearing plate; 62-Mixing pot cover; 63-Lifting structure; 64-CNC screen. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The purpose of this invention is to provide a mixing device to solve the problems existing in the prior art and to simplify the structure of the mixing device.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the following description is provided in conjunction with the appendix. Figures 1-2 The present invention will be further described in detail below with reference to specific embodiments.

[0024] This utility model provides a mixing device, see reference. Figures 1-2The system includes a mixing pot body 1 and a wind tunnel chamber 2. The mixing pot body 1 has a pot opening for adding materials into the mixing pot body 1. The mixing pot body 1 is equipped with stirring blades 11, which rotate around a rotating axis inside the mixing pot body 1. The wind tunnel chamber 2 has a cavity for fluid flow. The cavity includes an expanding section, a constant section, and a shrinking section that are connected and linked in sequence in a first direction. The cross-section of the expanding section perpendicular to the first direction gradually increases in the first direction. The cross-section of the constant section perpendicular to the first direction remains constant. The cross-section of the shrinking section perpendicular to the first direction gradually decreases in the first direction. The expanding section is provided with a first opening that communicates with the outside. The constant section is provided with a second opening that communicates with the outside. The shrinking section is provided with a third opening that communicates with the outside. The first opening is connected to a ventilation device 21, which can deliver gas into the cavity through the first opening. The second opening is used to add fibers into the cavity. The third opening is connected to the mixing pot body 1 through a pipe 22, through which fibers can enter the interior of the mixing pot body 1. By setting up a wind tunnel chamber 2, and designing a locally variable cross-section (narrow at both ends and wide in the middle) with the internal cavity of the wind tunnel chamber 2 having a cross-section that gradually increases and then decreases again perpendicular to the first direction, the wind speed gradually decreases and then increases again. The relatively slow wind speed inside the wind tunnel chamber 2 ensures that the material entering the wind tunnel chamber 2 has sufficient time to fall and disperse, effectively pre-dispersing the fibers and making them easier to disperse when mixed with asphalt. Furthermore, the connection between the wind tunnel chamber 2 and the air supply device 21 allows for easier adjustment of the fiber conveying speed. The wind tunnel chamber 2 has a simple structure; pre-dispersing the fibers is achieved simply by blowing air into the wind tunnel chamber 2, thus simplifying the structure of the mixing device. In some other embodiments, the mixing blades 11 are detachable, facilitating the removal of the mixing blades 11 and the transfer of the mixture after mixing.

[0025] In some embodiments of this utility model, the mixing device further includes a first storage silo 3, which is disposed above the mixing pot 1. The first storage silo 3 is used to hold asphalt and has a first feeding port and a first discharge end 32. The first discharge end 32 is equipped with a first electrically controlled valve 33 and is located above the opening of the pot body, allowing asphalt to flow into the mixing pot 1 through the first discharge end 32. The first storage silo 3 holds asphalt, and the first storage silo 3 is equipped with a first electrically controlled valve 33. Opening the first electrically controlled valve 33 allows asphalt to enter the mixing pot 1 through the first discharge end 32. The structure is simple, the operation is convenient, and it saves manpower. In this embodiment, the first electrically controlled valve 33 is a high-temperature resistant valve.

[0026] In some embodiments of this invention, the mixing device further includes a second storage silo 4 for holding fibers. The second storage silo 4 has a second feeding port 41 and a second discharging port 42. The second discharging port 42 is connected to a constant section, and a second electrically controlled valve 43 is provided at the second discharging port 42. Fibers can enter the wind tunnel chamber 2 from the second discharging port 42 through a second opening. By setting up the second storage silo 4 to hold fibers, and by providing the second electrically controlled valve 43, opening the second electrically controlled valve 43 allows the fibers to enter the wind tunnel chamber 2 through the second discharging port 42. The structure is simple, the operation is convenient, and it saves manpower.

[0027] In some embodiments of this invention, the mixing device further includes an information collection device and a processor. The information collection device is positioned above the opening of the pot body. The processor is signal-connected to the mixing pot body 1, the information collection device, the first electrically controlled valve 33, and the second electrically controlled valve 43. The information collection device is used to acquire image information of the fibers contained within the mixing pot body 1 and transmit the image information to the processor. By using the information collection device to collect information on the degree of fiber dispersion within the mixing pot body 1, and by signal-connecting the processor to the information collection device, the degree of fiber dispersion within the mixing pot body 1 can be judged in real time, thereby controlling the mixing time and obtaining a fiber-reinforced asphalt mixture with better fiber dispersion, thus improving the performance of the fiber-reinforced asphalt mixture.

[0028] In some embodiments of this invention, the information collection device includes a high-temperature resistant camera 5. The high-temperature resistant camera 5 can collect image information within the mixing pot 1 and transmit this information to a processor. The processor uses a visual algorithm to determine the degree of fiber dispersion and then transmits a signal to the mixing pot 1, instructing the stirring blades 11 within the mixing pot 1 to continue stirring or stop stirring. This avoids the inaccuracy of judging the degree of fiber dispersion within the mixing pot 1 by manual visual inspection. Furthermore, compared to manual visual inspection, the processor-based judgment is faster and more accurate, reducing the time required to determine the degree of fiber dispersion. It also avoids the need to open the container during manual visual inspection, reducing heat loss within the mixing pot 1. This invention uses existing mature visual algorithms to obtain the degree of fiber dispersion in the mixing pot 1. For example, feature extraction algorithms can be used to configure a light source for a high-temperature resistant camera 5 to take pictures of the surface of the mixture. By pre-recording the fiber features in the processor, the processor performs feature recognition, extraction and analysis on the image returned by the high-temperature resistant camera 5 to obtain the distribution image of the fibers in the mixture. Then, by calculating the average density of fibers per unit area, the degree of fiber dispersion in the mixture can be obtained.

[0029] In some embodiments of this invention, a first heating device 31 is provided on the first storage silo 3. The first heating device 31 is used to heat the asphalt and is connected to a processor. The first heating device 31 can heat the asphalt, ensuring that the asphalt enters the mixing pot 1 at a set temperature, and preventing asphalt at lower or higher temperatures from flowing into the mixing pot 1 and affecting the mixture inside the mixing pot 1. In this embodiment, the first heating device 31 is a heating metal wire, which is wound around the outside of the first storage silo 3. By making the heating metal wire conductive, the first storage silo 3 can be heated, thereby heating the asphalt inside the first storage silo 3. A magnetic induction heating device or other heating devices can also be used to heat the first storage silo 3. The first heating device 31 is connected to the processor, which can transmit instructions to the first heating device 31 to adjust its temperature setpoint.

[0030] In some embodiments of this utility model, the end of the pipe 22 is a heat-conducting pipe body, on which a third heating device 23 is provided. The third heating device 23 is used to heat the fibers inside the heat-conducting pipe body and is signal-connected to the processor. A third heating device 23 is also provided at the third discharge port. The third heating device 23 can preheat the fibers to a set temperature, preventing excessively high or low fiber temperatures from affecting the mixture in the mixing pot 1. In this embodiment, the third heating device 23 is a heating metal wire wound around the outer wall of the heat-conducting pipe body. By making the heating metal wire conductive, the heat-conducting pipe body can be heated, thereby heating the fibers inside the heat-conducting pipe body. A magnetic induction heating device or other heating devices can also be used to heat the heat-conducting pipe body. The third heating device 23 is signal-connected to the processor, which can transmit commands to the third heating device 23 to adjust its temperature setpoint.

[0031] In some embodiments of this utility model, the mixing device further includes a mixing chamber 6, with the mixing pot body 1, the first storage bin 3, the information collection device, and the processor all disposed inside the mixing chamber 6; a support plate 61 is disposed on the upper part of the mixing chamber 6, and a mixing pot lid 62 is fixed on the lower surface of the support plate 61, with an opening at the bottom of the mixing pot lid 62; the first storage bin 3 and the information collection device are both fixed above the support plate 61, and the first discharge end 32 and one end of the information collection device both pass through the support plate 6. The pipe extends into the mixing pot cover 62, passing through the side wall of the mixing chamber 6 and the support plate 61. A lifting structure 63 is installed at the lower part of the mixing chamber 6, with its output end connected to the mixing pot body 1. The mixing pot body 1 can move up and down under the action of the lifting structure 63. When the mixing pot body 1 moves upward, the mixing pot cover 62 can extend into the pot opening and close it; when the mixing pot body 1 moves downward, the mixing pot cover 62 can detach from the pot opening. The mixing pot body 1 is located inside the mixing chamber 6. An information collection device is used to evaluate the degree of fiber dispersion in the fiber-reinforced asphalt mixture, avoiding heat loss caused by manually checking the fiber dispersion in the mixing pot body 1 after stopping mixing, and thus saving energy. By setting up a support plate 61 and a mixing pot lid 62, the lifting structure 63 moves the mixing pot 1 upward during mixing, and the mixing pot lid 62 is fastened to the mixing pot 1, which can reduce the heat loss of the mixture in the mixing pot 1 during mixing. In some other embodiments, ventilation openings are provided on the support plate 61 and the inner wall of the mixing box 6 above the support plate 61, and air outlets are provided on the mixing pot lid 62. The interior of the mixing pot 1 is connected to the outside atmosphere through the air outlets and ventilation openings. The ventilation openings can keep the air pressure in the mixing pot 1 constant, avoiding the situation where air is sent into the mixing pot 1 when adding fibers, causing the air pressure in the mixing pot 1 to rise, and also avoiding the situation where the air pressure in the mixing pot 1 is too high to continue sending air in. In some other embodiments, sealing elements are provided between the first discharge end 32, one end of the high-temperature resistant camera 5, and the pipe 22 and the support plate 61 to prevent heat loss. In some other embodiments, the first storage bin 3 can be filled by providing an opening in the mixing bin 6, and the opening can be opened or closed by a cover plate, which can reduce the heat loss inside the mixing bin 6.

[0032] In some embodiments of this invention, a fourth heating device is provided on the mixing pot body 1. This fourth heating device heats the mixing pot body 1, thereby heating the mixture inside. The fourth heating device is connected to a processor. The fourth heating device is a heating metal wire wound around the outer wall of the mixing pot body 1. By making the heating metal wire conductive, the mixing pot body 1 can be heated, thereby heating the mixture inside. Alternatively, a magnetic induction heating device or other heating devices can be used to heat the mixing pot body 1. The fourth heating device is connected to the processor, which can transmit commands to it to adjust its temperature setpoint.

[0033] In some embodiments of this invention, a CNC screen 64 is provided on the outside of the mixing chamber 6. The CNC screen 64 is connected to the processor and is used to display and control relevant parameters of the mixing device. By setting up the CNC screen 64 and connecting it to the processor, the operator can conveniently observe and adjust the relevant parameters inside the mixing device in real time.

[0034] Taking dry-mixed fiber-reinforced asphalt mixture as an example, during use, preheated aggregate (4 hours prior) is added to the mixing pot 1, asphalt at the required heating temperature is added to the first storage bin 3, and the required fibers are added to the second storage bin 4. The heating temperatures of the first, third, and fourth heating devices are set via the CNC screen 64, and the mixing device is started. The mixing pot 1 moves upward and contacts the mixing pot cover 62, forming a closed space, and the mixing blades 11 start mixing simultaneously. In the first mixing stage, the processor starts the air supply device 21 according to the set program and opens the second electrically controlled valve 43 to blow the fibers into the mixing pot 1 through the end of the pipe 22. In the second mixing stage, the second electrically controlled valve 43 is opened via the CNC screen 64 to allow the required amount of asphalt to flow into the mixing pot 1 through the first discharge end 32. In the third mixing stage, the fibers have been added, and mineral powder is manually added to the second storage bin 4, while the air supply device 21 also blows the mineral powder into the mixing pot 1. In the fourth mixing stage, mixing is continued or stopped depending on the degree of fiber dispersion. After stirring stops, the mixing pot body 1 separates from the mixing pot lid 62, and the mixing pot body 1 descends to its original position.

[0035] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A mixing device, characterized in that: include: A mixing pot body, wherein the mixing pot body has a pot body opening for adding materials into the mixing pot body, and a stirring blade is provided inside the mixing pot body, the stirring blade rotating around a rotating axis inside the mixing pot body. as well as A wind tunnel chamber has an internal cavity for fluid flow. The cavity includes an expanding section, a constant section, and a contracting section connected sequentially in a first direction. The cross-section of the expanding section perpendicular to the first direction gradually increases in size, the cross-section of the constant section perpendicular to the first direction remains constant, and the cross-section of the contracting section perpendicular to the first direction gradually decreases in size. The expanding section has a first opening communicating with the outside, the constant section has a second opening communicating with the outside, and the contracting section has a third opening communicating with the outside. The first opening is connected to a ventilation device that can deliver gas into the cavity through the first opening. The second opening is used to add fibers into the cavity. The third opening is connected to a mixing pot body through a pipe, allowing the fibers to enter the mixing pot body through the pipe.

2. The mixing device according to claim 1, characterized in that: Also includes: The first storage bin is located above the mixing pot and is used to hold asphalt. The first storage bin has a first feeding port and a first discharging end. The first discharge end is equipped with a first electrically controlled valve. The first discharge end is located above the opening of the pot body, and the asphalt can flow into the interior of the mixing pot body through the first discharge end.

3. The mixing device according to claim 2, characterized in that: Also includes: The second storage bin is used to hold the fiber. The second storage bin has a second feeding port and a second discharging port. The second discharging port is connected to the constant section. A second electrically controlled valve is provided at the second discharging port. The fiber can enter the wind tunnel chamber from the second discharging port through the second opening.

4. The mixing device according to claim 3, characterized in that: Also includes: An information collection device is provided above the opening of the pot body; The processor is connected to the mixing pot body, the information collection device, the first electrically controlled valve, and the second electrically controlled valve. The information collection device is used to acquire image information of the fibers contained in the mixing pot body and transmit the image information to the processor.

5. The mixing device according to claim 4, characterized in that: The information collection device includes a high-temperature resistant camera.

6. The mixing device according to claim 4, characterized in that: The first storage silo is equipped with a first heating device, which is used to heat the asphalt and is signal-connected to the processor.

7. The mixing device according to claim 5, characterized in that: The end of the pipeline is a heat-conducting pipe body, and a third heating device is provided on the heat-conducting pipe body. The third heating device is used to heat the fibers inside the heat-conducting pipe body, and the third heating device is signal-connected to the processor.

8. The mixing device according to claim 7, characterized in that: Also includes: The mixing chamber, the mixing pot body, the first storage bin, the information collection device, and the processor are all located inside the mixing chamber; The upper part of the mixing box is provided with a support plate, and a mixing pot lid is fixed on the lower surface of the support plate. The bottom of the mixing pot lid is open. The first storage bin and the information collection device are both fixed above the support plate. The first discharge end and one end of the information collection device both pass through the support plate and extend into the interior of the mixing pot lid. The pipeline passes through the side wall of the mixing box and the support plate and extends into the interior of the mixing pot lid. The lower part of the mixing tank is provided with a lifting structure. The output end of the lifting structure is connected to the mixing pot body. The mixing pot body can move up and down under the drive of the lifting structure. When the mixing pot body moves up, the mixing pot lid can extend into the opening of the pot body and close the opening. When the mixing pot body moves down, the mixing pot lid can detach from the opening of the pot body.

9. The mixing device according to claim 4, characterized in that: The mixing pot body is equipped with a fourth heating device, which is used to heat the mixing pot body and thus heat the mixture inside the mixing pot body. The fourth heating device is signal-connected to the processor.

10. The mixing device according to claim 8, characterized in that: A CNC screen is installed on the outside of the mixing tank. The CNC screen is connected to the processor and is used to display and control the relevant parameters of the mixing device.

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