A double screw powder mixing and crushing integrated device

Abstract

This utility model relates to a twin-screw powder mixing and pulverizing integrated device, including a tank, a pulverizing tube disposed on the tank, and a mixing tube disposed on the upper side of the pulverizing tube. Two sets of threaded rods are arranged in parallel inside the mixing tube, which are used to cooperate to perform preliminary mixing of the powder. A first rotating shaft is provided inside the pulverizing tube, and several sets of blades are linearly and evenly distributed on the surface of the first rotating shaft. The blades are used to pulverize the powder. A second rotating shaft is provided inside the tank, and several sets of stirring rods are linearly and evenly distributed on the surface of the second rotating shaft. The stirring rods are used to perform final mixing of the pulverized powder. A control panel is provided on the side of the tank. By connecting the mixing tube, pulverizing tube, and tank in series from top to bottom, the powder can achieve uninterrupted continuous production of preliminary mixing, pulverizing, and final mixing under the action of gravity, which greatly reduces the equipment footprint and effectively avoids loss and cross-contamination caused by material transfer.

Description

Technical Field

[0001] This utility model relates to the technical field of mixing and pulverizing devices, and in particular to a twin-screw powder mixing and pulverizing integrated device. Background Technology

[0002] Powder mixing and pulverizing equipment is a highly efficient process intensification device. It is defined as a single unit that integrates pulverization and mixing functions. Its role is not only to simplify the process, improve efficiency, and reduce energy consumption, but also to produce powder products with more uniform composition and more stable quality. It plays an irreplaceable role in some high-end material preparation fields and is widely used in many industries such as pharmaceuticals, chemicals, metallurgy, building materials, food, and electronic materials.

[0003] Existing powder mixing and pulverizing equipment typically treats the mixer, pulverizer, and agitator as three independent devices connected by pipelines or conveyor belts. This results in problems such as dispersed equipment layout, large footprint, easy material spillage and contamination during transfer, independent power systems for each device leading to high energy consumption and complex control, and a single discharge method that makes it difficult to seamlessly integrate with subsequent automated equipment. Utility Model Content

[0004] The technical problem to be solved by this utility model is that existing powder mixing and pulverizing devices usually occupy a large area, and the materials are easy to escape and cause pollution during the transfer process; they have high energy consumption and complicated collaborative operation; the mixing effect is poor; the discharge method is single and it is difficult to seamlessly connect with subsequent packaging or conveying processes.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A twin-screw powder mixing and pulverizing integrated device includes a tank, a pulverizing tube disposed on the tank, and a mixing tube disposed on the upper side of the pulverizing tube. Two sets of threaded rods are arranged in parallel inside the mixing tube. The two sets of threaded rods are used to cooperate to perform preliminary mixing of the powder. A first rotating shaft is provided inside the pulverizing tube. Several sets of blades are linearly and evenly distributed on the surface of the first rotating shaft. The blades are used to pulverize the powder. A second rotating shaft is provided inside the tank. Several sets of stirring rods are linearly and evenly distributed on the surface of the second rotating shaft. The stirring rods are used to perform final mixing of the pulverized powder. A control panel is provided on the side of the tank. The control panel is used to control the working status of the threaded rods, blades, and stirring rods.

[0006] The beneficial effects of this utility model are as follows: by connecting the mixing pipe, crushing pipe, and tank in series from top to bottom, the powder achieves uninterrupted continuous production through preliminary mixing, crushing, and final mixing under gravity, greatly reducing the equipment footprint and effectively avoiding losses and cross-contamination caused by material transfer. Through the innovative design of the above-mentioned structural integration, transmission optimization, and control coordination, this utility model is not a simple stacking of existing technologies, but rather achieves a significant improvement in overall performance, possessing outstanding substantive features and significant progress.

[0007] Furthermore, a third rotating shaft is fixedly connected to the end of each of the two sets of threaded rods away from the crushing tube. Gears are fixedly connected to the third rotating shaft, and rack belts are fitted on the outer sides of the two sets of gears, with the rack belts meshing with the gears.

[0008] Furthermore, one set of gears is equipped with a first drive motor, which drives the connected gears to rotate, causing the rack belt to rotate synchronously, and the rack belt drives the other set of gears to rotate synchronously.

[0009] Furthermore, a second drive motor is provided at the upper end of the crushing tube, and the output end of the second drive motor is fixedly connected to the first rotating shaft.

[0010] Furthermore, the second drive motor drives the first rotating shaft to rotate, which in turn drives the blades to rotate synchronously. The blades then pulverize the powder by rotating.

[0011] Furthermore, a third drive motor is provided at the bottom of the tank. The output end of the third drive motor is fixedly connected to the second rotating shaft. The third drive motor drives the second rotating shaft to rotate, thereby causing the stirring rod to rotate synchronously. The stirring rod mixes the powder by rotating.

[0012] Furthermore, a feed hopper is provided on the outer side of the mixing tube away from the crushing tube, and the feed hopper is used to introduce the powder to be processed.

[0013] Furthermore, a discharge pipe is provided on the side of the tank, and a connector is fixedly connected to the end of the discharge pipe. The connector is used to connect with an external suction structure to discharge the mixed powder.

[0014] Compared with the prior art, this utility model has the following outstanding substantive features and significant progress:

[0015] 1. High-level structural integration and collaborative optimization of processes

[0016] In existing technologies, mixing, crushing, and stirring are mostly done in series with independent equipment, which leads to problems such as equipment redundancy, poor connection, and easy material leakage. This utility model achieves seamless integration of the three processes of "preliminary mixing → crushing → final mixing" by designing the mixing pipe, crushing pipe, and tank in series from top to bottom and using gravity flow connection. This structure not only significantly reduces the equipment footprint, but more importantly, through process collaborative design, it avoids the exposure and cross-contamination of materials during transfer, realizing continuous and closed-loop production.

[0017] 2. Innovative Design of Twin-Screw Synchronous Transmission System

[0018] Traditional twin-screw mixers often employ independent motor drives or complex gearbox transmissions, resulting in high costs and complex structures. This invention innovatively adopts a synchronous transmission method of "single motor, gear, and rack and belt," achieving synchronous opposite rotation of two sets of screw rods with only a single first drive motor. This method features a simple structure, high transmission efficiency, low manufacturing cost, and ease of maintenance.

[0019] 3. Multi-process centralized control system

[0020] In existing technologies, mixing, crushing, and stirring equipment typically require separate control, resulting in cumbersome operation and high energy consumption. This invention centrally controls the first, second, and third drive motors through a single control panel, achieving coordinated control of the three major processes: mixing, crushing, and stirring. This simplifies operation, significantly reduces energy consumption, and allows for flexible adjustment of the speed and processing time of each stage based on material characteristics.

[0021] 4. Universality and automation adaptability of the discharge interface

[0022] Traditional discharge methods often use simple discharge ports, which are difficult to adapt to automated production lines. This invention features a connector at the end of the discharge pipe, allowing direct connection to a negative pressure suction system, achieving fully enclosed, automated discharge and improving the overall line integration and clean production level.

[0023] The beneficial effects of adopting the above-mentioned further solution are as follows: By integrating the control panel to control the first, second, and third drive motors, centralized and precise management of the working status of the threaded rods, blades, and stirring rods is achieved. This integrated control not only simplifies operation and reduces the total installed power, but also optimizes overall energy efficiency through the adjustable speed of each stage. By setting up a two-stage mixing and a dedicated single-stage pulverizing structure, the powder is first pre-mixed in the mixing tube by two sets of threaded rods in a preliminary and distributed manner, so that the components are evenly dispersed. Then it enters the pulverizing tube, where the high-speed rotating blades perform non-segregated and fair pulverization of the pre-mixed material, ensuring the consistency of the pulverization effect. Finally, the pulverized powder is homogenized by the stirring rod in the tank, thereby ensuring that the final product has extremely high uniformity. A connector is set at the end of the discharge pipe, which can be directly connected to an external negative pressure suction system, realizing fully enclosed and automated powder conveying, which greatly improves the automation level and clean production level of the entire production line. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of this utility model from another angle;

[0026] Figure 3 This is a schematic diagram of the threaded rod structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the blade structure of this utility model;

[0028] Figure 5 This is a schematic diagram of the stirring rod structure of this utility model.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Tank body; 2. Crushing pipe; 3. Mixing pipe; 4. Threaded rod; 5. First rotating shaft; 6. Blade; 7. Second rotating shaft; 8. Stirring rod; 9. Feed hopper; 10. Discharge pipe; 11. Control panel; 12. Third rotating shaft; 13. Gear; 14. Rack and belt; 15. First drive motor; 16. Second drive motor; 17. Third drive motor; 18. Connector. Detailed Implementation

[0031] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0032] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0033] like Figures 1-5 As shown, a twin-screw powder mixing and pulverizing integrated device includes a tank 1, a pulverizing tube 2 disposed on the tank 1, and a mixing tube 3 disposed on the upper side of the pulverizing tube 2. Two sets of threaded rods 4 are arranged side by side inside the mixing tube 3. The two sets of threaded rods 4 are used to cooperate to perform preliminary mixing of powder. A first rotating shaft 5 is provided inside the pulverizing tube 2. Several sets of blades 6 are linearly and evenly distributed on the surface of the first rotating shaft 5. The blades 6 are used to pulverize the powder. A second rotating shaft 7 is provided inside the tank 1. Several sets of stirring rods 8 are linearly and evenly distributed on the surface of the second rotating shaft 7. The stirring rods 8 are used to perform final mixing of the pulverized powder. A control panel 11 is provided on the side of the tank 1. The control panel 11 is used to control the working status of the threaded rods 4, blades 6 and stirring rods 8.

[0034] like Figure 3 As shown, a third rotating shaft 12 is fixedly connected to the end of each of the two sets of threaded rods 4 away from the crushing tube 2. A gear 13 is fixedly connected to the third rotating shaft 12. A rack belt 14 is sleeved on the outer side of the two sets of gears 13. The rack belt 14 meshes with the gears 13. A first drive motor 15 is provided on one set of gears 13. The first drive motor 15 drives the rack belt 14 to rotate synchronously by driving the gear 13 connected to it to rotate. The rack belt 14 drives the other set of gears 13 to rotate synchronously by rotating. The rotation of the gears 13 drives the threaded rods 4 to rotate synchronously, so that the two sets of threaded rods 4 can perform preliminary mixing of the powder through rotational cooperation.

[0035] like Figures 4-5 As shown, a second drive motor 16 is provided at the upper end of the crushing tube 2. The output end of the second drive motor 16 is fixedly connected to the first rotating shaft 5. The second drive motor 16 drives the first rotating shaft 5 to rotate, thereby driving the blade 6 to rotate synchronously. The blade 6 crushes the powder by rotating. A third drive motor 17 is provided at the bottom of the tank body 1. The output end of the third drive motor 17 is fixedly connected to the second rotating shaft 7. The third drive motor 17 drives the second rotating shaft 7 to rotate, thereby driving the stirring rod 8 to rotate synchronously. The stirring rod 8 mixes the powder by rotating.

[0036] like Figures 1-2As shown, a feed hopper 9 is provided on the outer side of the mixing pipe 3 away from the crushing pipe 2. The feed hopper 9 is used to introduce the powder to be processed. A discharge pipe 10 is provided on the side of the tank body 1. A connector 18 is fixedly connected to the end of the discharge pipe 10. The connector 18 is used to connect with the external suction structure to discharge the mixed powder.

[0037] Working principle:

[0038] First, the powder to be processed is fed into the mixing tube 3 from the feed hopper 9. The first drive motor 15 starts and drives a set of gears 13 to rotate. Through the transmission of the rack belt 14, the two sets of threaded rods 4 rotate synchronously in opposite directions. The threaded rods 4, through their unique spiral structure, shear, convection and diffuse the powder to complete the initial mixing.

[0039] Then, the pre-mixed powder falls into the crushing tube 2 below under the action of gravity. At this time, the second drive motor 16 starts and drives the first rotating shaft 5 and several sets of blades 6 linearly distributed on its surface to rotate at high speed. The rotating blades 6 generate strong impact, shearing and grinding action on the falling powder, crushing it to the target particle size.

[0040] Next, the pulverized powder continues to fall into the tank 1. The third drive motor 17 starts and drives the second rotating shaft 7 and the stirring rod 8 on it to rotate. The stirring rod 8 gently and thoroughly mixes the powder in the tank to ensure that the different components and particles of different sizes are evenly distributed to form the final product.

[0041] Finally, after the mixing and crushing process is completed, the final product is discharged through the discharge pipe 10 and connected to an external suction system through the connector 18, which can achieve efficient and dust-free automated discharge.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A twin-screw powder mixing and pulverizing integrated device, characterized in that, The device includes a tank (1), a crushing tube (2) on the tank (1), and a mixing tube (3) on the upper side of the crushing tube (2). Two sets of threaded rods (4) are arranged in parallel inside the mixing tube (3). The two sets of threaded rods (4) are used to cooperate in the initial mixing of the powder. The crushing tube (2) is equipped with a first rotating shaft (5). Several sets of blades (6) are linearly and evenly distributed on the surface of the first rotating shaft (5). The blades (6) are used to crush the powder. The tank (1) is equipped with a second rotating shaft (7). Several sets of stirring rods (8) are linearly and evenly distributed on the surface of the second rotating shaft (7). The stirring rods (8) are used to finally mix the crushed powder. A control panel (11) is provided on the side of the tank (1). The control panel (11) is used to control the working status of the threaded rods (4), blades (6), and stirring rods (8).

2. The integrated twin-screw powder mixing and pulverizing device according to claim 1, characterized in that, Two sets of threaded rods (4) are fixedly connected to a third rotating shaft (12) at the end away from the crushing tube (2). A gear (13) is fixedly connected to the third rotating shaft (12). A rack belt (14) is sleeved on the outside of the two sets of gears (13). The rack belt (14) meshes with the gear (13).

3. The integrated twin-screw powder mixing and pulverizing device according to claim 2, characterized in that, One set of gears (13) is equipped with a first drive motor (15). The first drive motor (15) drives the gear (13) connected to it to rotate, thereby driving the rack belt (14) to rotate synchronously. The rack belt (14) drives another set of gears (13) to rotate synchronously.

4. The twin-screw powder mixing and comminuting integrated device according to claim 1, characterized in that, The upper end of the crushing tube (2) is provided with a second drive motor (16), and the output end of the second drive motor (16) is fixedly connected to the first rotating shaft (5).

5. The twin-screw powder mixing and comminuting integrated device according to claim 4, wherein The second drive motor (16) drives the first rotating shaft (5) to rotate, which in turn drives the blade (6) to rotate synchronously. The blade (6) crushes the powder by rotating.

6. The twin-screw powder mixing and comminuting integrated device according to claim 1, wherein The bottom of the tank (1) is equipped with a third drive motor (17). The output end of the third drive motor (17) is fixedly connected to the second rotating shaft (7). The third drive motor (17) drives the second rotating shaft (7) to rotate, thereby driving the stirring rod (8) to rotate synchronously. The stirring rod (8) mixes the powder by rotating.

7. The twin-screw powder mixing and comminuting integrated device according to claim 1, wherein A feed hopper (9) is provided on the outer side of the mixing tube (3) away from the crushing tube (2). The feed hopper (9) is used to introduce the powder to be processed.

8. The twin-screw powder mixing and comminuting integrated device according to claim 1, characterized in that, The tank body (1) is provided with a discharge pipe (10) on the side. The end of the discharge pipe (10) is fixedly connected to a connector (18). The connector (18) is used to connect with an external suction structure to discharge the mixed powder.

Images