A material mixing and stirring device

Abstract

This utility model belongs to the field of aggregate mixing technology, specifically an aggregate mixing and stirring device, including a frame, a twin-shaft mixer, and a feeding mechanism. The twin-shaft mixer is mounted on the frame, and a discharge port is provided at the bottom of the twin-shaft mixer. A discharge baffle is provided at the discharge port, and the cross-section of the discharge baffle is arc-shaped, with a rectangular horizontal projection. The arc shape of the discharge port matches that of the discharge baffle. The discharge baffle is rotatably connected to a rotating seat at the bottom of the twin-shaft mixer via a turntable. The feeding mechanism is mounted on the feed end of the twin-shaft mixer via a bracket. The feeding mechanism includes a feeding bucket and a feeder. The feeder has a frustum structure, and a cross is provided on the top of the feeding bucket. An electric cylinder is installed on the cross. The feeder is connected to the output shaft of the electric cylinder via a connecting rod. Compared with the prior art, this utility model can accurately control the feeding ratio of depleted uranium aggregate and new raw materials, improving mixing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of aggregate mixing technology, and in particular to an aggregate mixing and stirring device. Background Technology

[0002] In the field of highway construction and maintenance, asphalt pavement is widely used on highways of all levels due to its advantages such as high smoothness, driving comfort, and convenient maintenance. However, with the increase in the service life of asphalt pavement and the accumulation of traffic loads, it is necessary to perform milling and renovation regularly, resulting in a large amount of asphalt milling material. Therefore, the resource recycling and utilization of asphalt milling material has become a key direction for practicing the concept of green transportation development and reducing highway construction costs. After crushing and screening, asphalt milling material can be separated into aggregates of different particle sizes. Among them, depleted uranium aggregate, due to its good physical and mechanical properties, has become an important resource to replace some of the new raw materials in the preparation of asphalt mixtures. However, the mixing quality of depleted uranium aggregate and new raw materials directly determines the road performance of the subsequent asphalt mixture. If the two are not mixed evenly, it will lead to inconsistent asphalt film coating, which in turn will cause early diseases such as pavement cracks, spalling, and rutting, seriously affecting the service life of the pavement.

[0003] Currently, most equipment used in the industry for mixing depleted uranium aggregates with new raw materials is based on improvements to traditional aggregate mixing devices used in construction. These devices suffer from insufficient precision in material control, unbalanced initial mixing ratios, low mixing efficiency, inadequate mixing of old and new aggregates, poor stability in discharge control, and a lack of emergency protection mechanisms.

[0004] In summary, existing aggregate mixing equipment cannot meet the technical requirements for efficient and uniform mixing of depleted uranium aggregates and new raw materials after screening of asphalt milling material. Furthermore, it has significant deficiencies in terms of operational stability and equipment durability, which restricts the large-scale promotion of asphalt milling material resource utilization. Therefore, there is an urgent need for a targeted and optimized aggregate mixing device to solve the above problems. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by developing a material mixing and stirring device that can precisely control the feeding ratio of depleted uranium aggregate and new raw materials, thereby improving mixing efficiency.

[0006] The technical solution of this utility model to solve the technical problem is as follows: a material mixing and stirring device, including a frame, a twin-shaft mixer and a feeding mechanism. The twin-shaft mixer is installed on the frame, and a discharge port is provided at the bottom of the twin-shaft mixer. A discharge baffle is provided at the discharge port. The cross-section of the discharge baffle is arc-shaped, and the horizontal projection is rectangular. The arc shape of the discharge port matches that of the discharge baffle. The discharge baffle is rotatably connected to the rotating seat at the bottom of the twin-shaft mixer via a turntable. The feeding mechanism is installed at the feeding end of the twin-shaft mixer via a bracket. The feeding mechanism includes a feeding bucket and a feeding device. The feeding device has a frustum structure. A cross is provided on the top of the feeding bucket. An electric cylinder is installed on the cross. The feeding device is connected to the output shaft of the electric cylinder via a connecting rod.

[0007] Preferably, a rotating motor and a transmission mechanism are mounted on the frame. The transmission mechanism includes a transmission component connected to the output shaft of the rotating motor via a belt. The transmission mechanism also includes a set of meshing first gears and second gears meshing with the first gears. The two second gears are respectively connected to the two mixing shafts of the twin-shaft mixer. The output shaft of the transmission component is connected to one of the first gears.

[0008] Preferably, a speed reducer is installed on a rotating seat on one side of the discharge baffle, and the turntable is connected to the output shaft of the speed reducer to realize the opening and closing of the discharge baffle by electronic control.

[0009] Preferably, an emergency switch is provided on the rotating seat of the discharge baffle on the side away from the reducer.

[0010] Preferably, the bottom of the feeder is connected to an extension rod, and a guide plate is inclinedly arranged on the extension rod to guide the material to the radial center position of the twin-shaft mixer.

[0011] Preferably, the lower edge of the feeder has a transition chamfer.

[0012] Preferably, the outer surface of the twin-shaft mixer is provided with a reinforcing plate.

[0013] Preferably, the feeding mechanism is arranged in an array.

[0014] The effects provided in the utility model description are merely those of the embodiments, and not all the effects of the utility model. The above technical solution has the following advantages or beneficial effects: 1. With a specially designed feeder, only the cylinder needs to retract during feeding. The feeder and the feeding barrel form an annular channel. After feeding is completed, the cylinder can be extended. Compared with the traditional bottom-mounted feeding baffle, the feeder designed in this utility model is more durable and will not deform after long-term use, thus improving the service life of the equipment. 2. By designing a transition chamfer at the lower edge of the feeder, when the feeder is closed, the material stuck at the lower edge of the feeder will move upward under pressure due to the arc surface design, which can effectively prevent material jamming. 3. By installing an emergency switch on the rotating seat on one side of the discharge baffle, manual discharge can be performed in case of a geared motor failure; 4. By setting an extension rod with a guide plate inclined on it to guide the material to the radial center of the twin-shaft mixer, coarse and fine aggregates can be guided to the radial center of the twin-shaft mixer during the feeding process to complete premixing. This prevents uneven mixing and long mixing time when directly feeding materials, thus improving mixing efficiency. 5. The discharge baffle and discharge port adopt an arc-shaped design. The discharge port is opened by rotation, which can improve the service life of the discharge baffle and prevent deformation caused by long-term pressure when using a gate-type discharge baffle, thus improving the service life of the equipment. 6. By installing reinforcing hoops on the twin-shaft mixer, the strength of the equipment can be further improved; 7. The array-configured feeding mechanism can store various depleted uranium aggregates or new raw materials of different particle sizes, making operation convenient. Attached Figure Description

[0015] Figure 1 This is the front view of the present invention; Figure 2 for Figure 1 A cross-sectional view along the AA direction; Figure 3 for Figure 1 Cross-sectional view along the BB direction; Figure 4 for Figure 1 A cross-sectional view along the CC direction; Figure 5 This is the right view of the present invention; Figure 6 This is a bottom view of the present invention; Figure 7 for Figure 6 A magnified view of a portion of region A in the middle; Figure 8 This is a general structural diagram of the present invention.

[0016] The components include: 1. Frame; 2. Twin-shaft mixer; 21. Discharge baffle; 211. Gear motor; 212. Emergency switch; 213. Turntable; 214. Rotating seat; 22. Rotating motor; 23. Transmission mechanism; 231. First gear; 232. Second gear; 233. Transmission component; 24. Reinforcing hoop; 3. Feeding bucket; 31. Support; 4. Feeder; 41. Electric cylinder; 42. Connecting rod; 43. Guide plate; 431. Extension rod; 44. Transition bevel. Detailed Implementation

[0017] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0018] Example 1 See Figures 1 to 8 A material mixing and stirring device includes a frame 1, a twin-shaft mixer 2, and a feeding mechanism. The twin-shaft mixer 2 is mounted on the frame 1. The bottom of the twin-shaft mixer 2 is provided with a discharge port, and a discharge baffle 21 is provided at the discharge port. The discharge baffle 21 has an arc-shaped cross-section and a rectangular horizontal projection. The arc shape of the discharge port matches that of the discharge baffle 21. The discharge baffle 21 is rotatably connected to a rotating seat 214 at the bottom of the twin-shaft mixer 2 via a turntable 213. The feeding mechanism is mounted on the feeding end of the twin-shaft mixer 2 via a bracket 31. The feeding mechanism includes a feeding bucket 3 and a feeder 4. The feeder 4 has a frustum structure. A cross is provided on the top of the feeding bucket 3. An electric cylinder 41 is mounted on the cross. The feeder 4 is connected to the output shaft of the electric cylinder 41 via a connecting rod 42.

[0019] The frame 1 is equipped with a rotating motor 22 and a transmission mechanism 23. The transmission mechanism 23 includes a transmission component 233, which is connected to the output shaft of the rotating motor 22 via a belt. The transmission mechanism 23 also includes a set of meshing first gears 231 and second gears 232 that mesh with the first gears 231 respectively. The two second gears 232 are respectively connected to the two mixing shafts of the twin-shaft mixer 2. The output shaft of the transmission component 233 is connected to one of the first gears 231.

[0020] A speed reducer is installed on one side of the rotating seat 214 of the discharge baffle 21, and the turntable 213 is connected to the output shaft of the speed reducer to realize the opening and closing of the electrically controlled discharge baffle 21.

[0021] An emergency switch is provided on the rotating seat 214 on the side of the discharge baffle 21 away from the reducer.

[0022] The bottom of the feeder 4 is connected to an extension rod 431, and an inclined guide plate 43 is provided on the extension rod 431 to guide the material to the radial center position of the twin-shaft mixer 2.

[0023] The lower edge of the feeder 4 has a transition chamfer of 44.

[0024] The outer surface of the twin-shaft mixer 2 is provided with a reinforcing plate.

[0025] The feeding mechanism is arranged in an array.

[0026] Working principle This utility model uses an existing controller to control the geared motor 211, the rotary motor 22, and the electric cylinder 41.

[0027] Initial stage: With the electric cylinder 41 fully extended, the frustum-shaped feeder 4 is pushed to its lowest point via the connecting rod 42, its lower edge tightly fitting against the inner wall of the feed hopper 3, forming an annular sealing surface and blocking the material's downward flow. At this time, different materials such as depleted uranium aggregate and new raw materials have been loaded into the arrayed feed hoppers 3, each corresponding to one type of material. The array layout enables synchronous control of multiple components. The stirring shaft of the twin-shaft mixer 2 is stationary, and the reinforcing plate on its outer surface is fixed to the machine body by welding or bolts to enhance overall rigidity and prevent deformation caused by material impact during subsequent stirring. The arc-shaped discharge baffle 21 is completely fitted against the arc-shaped surface of the discharge port and locked in the closed position by the turntable 213; the reducer is in a de-energized state, and the emergency switch is in the locked position to ensure that materials are not accidentally discharged.

[0028] Material feeding stage: The controller sends extension / retraction commands to the corresponding electric cylinder 41 of the feeding mechanism according to the preset material ratio. For example, when it is necessary to increase the feeding amount of depleted uranium aggregate, the controller controls the corresponding electric cylinder 41 to have a larger retraction stroke and a longer duration. After receiving the command, the piston rod of the electric cylinder 41 retracts upward, driving the frustum-shaped feeder 4 to move upward synchronously through the connecting rod 42. At this time, an annular channel is formed between the outer wall of the feeder 4 and the inner wall of the feeding barrel 3, and the material falls along the channel under the action of gravity. Since the feeder 4 is a frustum structure, the channel width changes uniformly when it moves upward, and the feeding speed can be precisely adjusted by controlling the displacement of the electric cylinder 41. The greater the displacement, the wider the channel, and the faster the feeding. When the feeder 4 moves upward or downward, the transition chamfer 44 of its lower edge generates a guiding force when it comes into contact with the material: if a particle is stuck at the edge, the curved surface will exert an upward pushing force on the material, forcing the particle to detach from the stuck position and fall with the mainstream. This design reduces the probability of material jamming compared to the traditional straight edge. The falling material is guided to the guide plate 43 by the extension rod 431 at the bottom of the feeder 4. The guide plate 43 is inclined at a 30°-45° angle and faces the radial center of the twin-shaft mixer 2 (the middle area between the two mixing shafts), so that the materials from different feeding mechanisms form a preliminary convergence and mixing in the central area before entering the mixing chamber, reducing the pressure on the uniformity of subsequent mixing.

[0029] Mixing stage: After the rotating motor 22 on frame 1 starts, its output shaft drives the transmission component 233 to rotate via a belt. The output shaft of the transmission component 233 is connected to the first gear 231, driving it to rotate. The first gear 231 simultaneously meshes with two second gears 232, which are respectively connected and fixed to the two mixing shafts of the twin-shaft mixer 2 via keys. Due to the meshing relationship between the first gear 231 and the two second gears 232, the two mixing shafts achieve counter-rotating differential speeds. This design enables the mixing blades to generate three-dimensional shear force on the material: pushing the material axially and forming cross-mixing radially, avoiding the accumulation of unmixed areas of material in traditional single-shaft mixing, thus improving the mixing uniformity.

[0030] Discharge stage: After the controller detects that the stirring has reached the preset time, it sends a start signal to the reducer. The output shaft of the reducer drives the turntable 213 to rotate. The turntable 213 is connected to the discharge baffle 21, so the baffle rotates synchronously with the turntable 213. Since both the baffle and the discharge port are arc-shaped, their contact surfaces gradually separate during rotation, and the material is discharged under the combined action of gravity and the pushing force of the stirring shaft. The arc-shaped contact surface is made of wear-resistant material, and the contact during rotation is surface contact rather than the line contact of a traditional gate-type baffle, reducing the force per unit area and significantly reducing the wear rate. At the same time, the rotary switch avoids the deformation and jamming caused by long-term pressure on the gate-type baffle. If the reducer suddenly malfunctions, the operator can turn on the emergency switch on the other side of the discharge baffle 21 to rotate the turntable 213 to open the discharge baffle 21, thus forcibly opening it by manually driving the turntable 213 to rotate.

[0031] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not a limitation on the scope of protection of the present utility model. Based on the technical solution of the present utility model, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the present utility model.

Claims

1. A material mixing and stirring device, comprising a frame (1), characterized in that: It also includes a twin-shaft mixer (2) and a feeding mechanism. The twin-shaft mixer (2) is installed on the frame (1). The bottom of the twin-shaft mixer (2) is provided with a discharge port. A discharge baffle (21) is provided at the discharge port. The cross-section of the discharge baffle (21) is arc-shaped and the horizontal projection is rectangular. The discharge port matches the arc shape of the discharge baffle (21). The discharge baffle (21) is rotatably connected to the rotating seat (214) at the bottom of the twin-shaft mixer (2) through a turntable (213). The feeding mechanism is installed at the feeding end of the twin-shaft mixer (2) through a bracket (31). The feeding mechanism includes a feeding bucket (3) and a feeder (4). The feeder (4) is a frustum structure. A cross is provided on the top of the feeding bucket (3). An electric cylinder (41) is installed on the cross. The feeder (4) is connected to the output shaft of the electric cylinder (41) through a connecting rod (42).

2. The aggregate mixing and blending apparatus of claim 1, wherein, The frame (1) is equipped with a rotating motor (22) and a transmission mechanism (23). The transmission mechanism (23) includes a transmission component (233), which is connected to the output shaft of the rotating motor (22) via a belt. The transmission mechanism (23) also includes a set of meshing first gears (231) and second gears (232) meshing with the first gears (231). The two second gears (232) are respectively connected to the two stirring shafts of the twin-shaft mixer (2). The output shaft of the transmission component (233) is connected to one of the first gears (231).

3. The aggregate mixing and blending apparatus of claim 1, wherein, A speed reducer is installed on a rotating seat (214) on one side of the discharge baffle (21), and the turntable (213) is connected to the output shaft of the speed reducer to realize the opening and closing of the discharge baffle (21) by electrical control.

4. The aggregate mixing and blending apparatus of claim 3, wherein, An emergency switch is provided on the rotating seat (214) on the side of the discharge baffle (21) away from the reducer.

5. The aggregate mixing and blending apparatus of claim 1, wherein, The feeder (4) is connected to an extension rod (431) at the bottom, and a guide plate (43) is inclinedly arranged on the extension rod (431) to guide the material to the radial center position of the twin-shaft mixer (2).

6. The aggregate mixing and blending apparatus of claim 1, wherein, The lower edge of the feeder (4) is a transition bevel (44).

7. The aggregate mixing and blending apparatus of claim 1, wherein, The outer surface of the twin-shaft mixer (2) is provided with a reinforcing plate.

8. The aggregate mixing and blending apparatus of claim 1, wherein, The feeding mechanism is arranged in an array.

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