A flour raw material screening and mixing device

Abstract

A powder raw material screening and mixing device, relating to the technical field of raw material screening devices, solves the problem of insufficient shearing force in existing technologies, making it difficult to break up tangled agglomerates of powder. It includes a housing and a screening cylinder, the screening cylinder being rotatably connected inside the housing. The screening cylinder has multiple sieve holes, and multiple crushing blades are uniformly connected inside the screening cylinder. A feed pipe is connected to the feed end of the screening cylinder; a conveying pipe is coaxially connected inside the feed pipe, and the feed pipe and conveying pipe are rotatably connected. The conveying pipe is fixedly connected to the housing. A blower is connected to the top of the housing, and a blower pipe is connected to the housing corresponding to the blower. A discharge port is connected to the bottom wall of the housing. The beneficial effects are: the crushing blades generate dynamic shearing force as the screening cylinder rotates; the change in the diameter of the trapezoidal cylinder causes the powder to be compressed during movement; and the blower assists in screening, effectively breaking up tangled agglomerates.

Description

Technical Field

[0001] This utility model relates to the technical field of raw material screening devices, specifically a screening and mixing device for powdered raw materials. Background Technology

[0002] Carbon-carbon composites are high-performance composite materials with carbon fibers and their fabrics as reinforcements and carbon as the matrix. They are widely used in aerospace, new energy, and high-end equipment manufacturing. In the production process of carbon-carbon composites, the screening and mixing of powder raw materials are key preliminary steps. The raw material system of carbon-carbon composites usually contains a variety of functional additive powders. Parameters such as the particle size distribution, mixing uniformity, and impurity content of each component powder in carbon-carbon composites are crucial to the subsequent material properties.

[0003] Excessively coarse particles can lead to pore defects inside the green body; uneven powder distribution can lead to component distribution defects and reduce the fatigue resistance of the material; hard impurities in the powder can form stress concentration points, causing the material to crack; and organic impurities can cause gas residue during carbonization, forming pore defects.

[0004] Current powder raw material screening devices generally have a structure similar to that described in patent application number "CN202320018685.7" for an automatic gypsum powder raw material screening machine. This includes a machine body, a feed inlet, a first discharge outlet, a second discharge outlet, a guide, a guide rail, a motor, a base, and protruding posts. The feed inlet is located on the upper left side of the machine body and has a funnel-shaped design. The first and second discharge outlets are located on the right side, away from the feed inlet, with the first discharge outlet positioned above the second discharge outlet. The length of the first discharge outlet is greater than the length of the second discharge outlet. A guide is installed below the first and second discharge outlets. A guide rail is located below the machine body, allowing the machine body to move along the length of the guide rail. A motor is located on one side of the machine body and mounted on the base. The motor is connected to a rotating shaft via a coupling. A protruding post with screws is mounted on the rotating shaft. When the machine body moves to the side closest to the motor, the protruding post can contact the machine body. However, the shearing force of this invention is insufficient, making it difficult to break up the tangled agglomerates of powder.

[0005] Therefore, this utility model proposes a powder raw material screening and mixing device to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of this invention is to provide a powder raw material screening and mixing device to solve the problem of insufficient shear force in the prior art, which makes it difficult to break up entangled agglomerates of powder.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A powder raw material screening and mixing device includes a casing and a screening cylinder. The bottom of the casing is evenly connected with multiple support legs. The casing is hollow. The screening cylinder is rotatably connected to the casing. The screening cylinder has multiple screen holes. Multiple crushing blades are evenly connected inside the screening cylinder.

[0009] The feeding end of the screening cylinder is connected to a feeding pipe, and a bearing is connected between the feeding pipe and the machine housing. A synchronous pulley is coaxially connected to the feeding pipe. A first drive motor drives the synchronous pulley to rotate through a synchronous belt. The first drive motor is connected to the side wall of the machine housing. A conveying pipe is coaxially connected inside the feeding pipe. The feeding pipe and the conveying pipe are rotatably connected. The conveying pipe is fixedly connected to the machine housing.

[0010] A blower is connected to the top of the chassis, and a blower pipe is connected to the chassis corresponding to the blower. A discharge port is connected to the bottom wall of the chassis.

[0011] Furthermore, a second drive motor is connected to the end of the conveying pipe, and a first spiral blade is coaxially connected to the drive shaft of the second drive motor. The first spiral blade is disposed inside the conveying pipe, and a feed inlet is connected to the upper end of the conveying pipe.

[0012] Furthermore, a rotating roller is provided at the discharge end of the screening cylinder. The rotating roller is symmetrically arranged at the bottom of the screening cylinder and is rotatably connected to the machine casing. The rotating roller is in contact with the screening cylinder.

[0013] Furthermore, the discharge end of the screening cylinder is connected to a rotating door, and a locking assembly is connected between the rotating door and the screening cylinder. An observation window is provided on the rotating door.

[0014] Furthermore, the screening cylinder is trapezoidal in shape, and its diameter gradually decreases from the inlet end to the outlet end.

[0015] Furthermore, a discharge pipe is connected to the discharge port, a third drive motor is connected to the bottom of the discharge pipe, a second spiral blade is coaxially connected to the drive shaft of the third drive motor, the second spiral blade is disposed inside the discharge pipe, a discharge port is opened on the side wall of the discharge pipe, and the bottom of the discharge pipe is inclined corresponding to the discharge port.

[0016] Furthermore, the bottom of the inner side of the chassis is inclined, and a vibration motor is connected to the bottom of the chassis; the bottom of each support leg is connected to a buffer pad.

[0017] In summary, compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. The crushing blades of this utility model generate dynamic shearing force as the screening cylinder rotates. The change in diameter of the trapezoidal cylinder causes the powder to be squeezed during movement, which can effectively break up entangled agglomerates. At the same time, the blower assists in screening, avoids clogging of the screen holes, and improves screening efficiency.

[0019] In this invention, the rotating roller at the bottom of the discharge end of the screening cylinder abuts against the cylinder body, and the friction helps the screening cylinder rotate stably, avoiding jamming caused by uneven load on the cylinder body. Attached Figure Description

[0020] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 ;

[0021] Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 ;

[0022] Figure 3 This is the front view of the present invention;

[0023] Figure 4 This is a partial cross-sectional view of the main view of this utility model;

[0024] In the diagram: 1. Chassis; 2. Screening cylinder; 3. Screen holes; 4. Crushing blades; 5. Support legs; 6. Buffer pad; 7. Rotating roller; 8. Feed pipe; 9. Bearing; 10. Synchronous pulley; 11. First drive motor; 12. Synchronous belt; 13. Conveying pipe; 14. Second drive motor; 15. First spiral blade; 16. Feed inlet; 17. Rotating door; 18. Locking assembly; 19. Observation window; 20. Blower; 21. Blower pipe; 22. Discharge port; 23. Discharge pipe; 24. Third drive motor; 25. Second spiral blade; 26. Discharge port; 27. Vibrating motor. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In this application, the terms "upper," "inner," "outer," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0027] like Figure 1-4 As shown, a powder raw material screening and mixing device includes a housing 1 and a screening cylinder 2. Multiple support legs 5 are evenly connected to the bottom of the housing 1, and buffer pads 6 are connected to the bottom of each support leg 5. The housing 1 is hollow. The screening cylinder 2 is rotatably connected inside the housing 1. Multiple screen holes 3 are opened on the screening cylinder 2, and multiple crushing blades 4 are evenly connected inside the screening cylinder 2. The screening cylinder 2 is trapezoidal in shape, and its diameter gradually decreases from the inlet end to the outlet end. A rotating roller 7 is provided at the outlet end of the screening cylinder 2. The rotating rollers 7 are symmetrically arranged at the bottom of the screening cylinder 2 and rotatably connected to the housing 1. The rotating rollers 7 are in contact with the screening cylinder 2.

[0028] Furthermore, the inlet end of the screening cylinder 2 is connected to an inlet pipe 8, and a bearing 9 is connected between the inlet pipe 8 and the housing 1. A synchronous pulley 10 is coaxially connected to the inlet pipe 8. A first drive motor 11 drives the synchronous pulley 10 to rotate through a synchronous belt 12. The first drive motor 11 is connected to the side wall of the housing 1. A conveying pipe 13 is coaxially connected inside the inlet pipe 8. The inlet pipe 8 and the conveying pipe 13 are rotatably connected. The conveying pipe 13 is fixedly connected to the housing 1. A second drive motor 14 is connected to the end of the conveying pipe 13. A first spiral blade 15 is coaxially connected to the drive shaft of the second drive motor 14. The first spiral blade 15 is disposed inside the conveying pipe 13. A feed inlet 16 is connected to the upper end of the conveying pipe 13.

[0029] Furthermore, the discharge end of the screening cylinder 2 is connected to a rotating door 17, and a locking assembly 18 is connected between the rotating door 17 and the screening cylinder 2. An observation window 19 is provided on the rotating door 17.

[0030] Furthermore, a blower 20 is connected to the top of the casing 1, and a blower pipe 21 is connected to the casing 1 corresponding to the blower 20. A discharge port 22 is connected to the bottom wall of the casing 1. A discharge pipe 23 is connected to the discharge port 22, and a third drive motor 24 is connected to the bottom of the discharge pipe 23. A second spiral blade 25 is coaxially connected to the drive shaft of the third drive motor 24. The second spiral blade 25 is disposed inside the discharge pipe 23. A discharge port 26 is opened on the side wall of the discharge pipe 23, and the bottom of the discharge pipe 23 is inclined corresponding to the discharge port 26. The bottom inner side of the casing 1 is inclined, and a vibration motor 27 is connected to the bottom of the casing 1.

[0031] The working process of this utility model is as follows:

[0032] First, the powdered raw material to be processed falls into the conveying pipe 13 from the feed inlet 16 at the top of the equipment. Then, the second drive motor 14 starts, driving the coaxial first spiral blade 15 to rotate, conveying the raw material axially along the conveying pipe 13 into the screening cylinder 2. At the same time, the first drive motor 11 drives the synchronous wheel 10 to rotate through the synchronous belt 12. The synchronous wheel 10 is coaxially connected to the feed pipe 8, thereby driving the screening cylinder 2 to rotate around its own axis. The crushing blades 4, which are evenly distributed on the inner wall of the screening cylinder 2, rotate with the cylinder body, generating mechanical shearing force on the entangled agglomerates in the powder, initially breaking up the agglomerate structure. The screening cylinder 2 has a trapezoidal structure with a large diameter at the feed end and a small diameter at the discharge end. When the powder rotates with the cylinder body, it will move towards the discharge end and be squeezed due to the gradually decreasing diameter of the cylinder body, further breaking up the agglomerates. At the same time, the powder impacts the screen holes 3 on the cylinder wall under the action of centrifugal force. Fine powder falls into the bottom of the machine box 1 through the screen holes 3, while coarse powder or undissolved agglomerates continue to move in the cylinder.

[0033] The rotating roller 7 at the bottom of the discharge end of the screening cylinder 2 contacts the cylinder body, and the friction helps the screening cylinder 2 to rotate stably, avoiding jamming caused by uneven load on the cylinder body. The blower 20 at the top of the machine box 1 blows airflow into the vicinity of the screening cylinder 2 through the air pipe 21, which not only helps the fine powder to pass through the screen holes 3 quickly, but also prevents the screen holes 3 from clogging. At the same time, it disturbs the powder in the cylinder and enhances the dispersion effect.

[0034] The fine powder falling into the bottom of the casing 1 then slides automatically towards the discharge port 22 due to the tilt of the bottom wall and enters the discharge pipe 23. At the same time, the vibration motor 27 at the bottom of the casing 1 starts, causing the bottom wall of the casing 1 and the screening cylinder 2 to vibrate slightly, promoting the fine powder after screening to gather towards the discharge port 22 and avoiding accumulation. Then, the third drive motor 24 drives the second spiral blade 25 to rotate, and outputs the fine powder in the discharge pipe 23 from the discharge port 26 on the side wall in a quantitative manner, which can further mix the powder and prevent the fine powder from clogging.

[0035] Coarse powder or agglomerates that do not pass through the sieve holes 3 are rotated to the discharge end of the screening cylinder 2. The rotating door 17 is opened by the locking assembly 18, which allows for cleaning of the inside of the screening cylinder 2. The observation window 19 allows for real-time monitoring of the material status inside the cylinder, ensuring normal operation.

Claims

1. A flour material screening and mixing device comprising a casing (1) and a screening cylinder (2), characterized in that, The bottom of the casing (1) is evenly connected with multiple support legs (5). The casing (1) is hollow. The screening cylinder (2) is rotatably connected inside the casing (1). Multiple screen holes (3) are opened on the screening cylinder (2). Multiple crushing blades (4) are evenly connected inside the screening cylinder (2). The feeding end of the screening cylinder (2) is connected to a feeding pipe (8), and a bearing (9) is connected between the feeding pipe (8) and the machine box (1). A synchronous pulley (10) is coaxially connected to the feeding pipe (8). A first drive motor (11) drives the synchronous pulley (10) to rotate through a synchronous belt (12). The first drive motor (11) is connected to the side wall of the machine box (1). A conveying pipe (13) is coaxially connected inside the feeding pipe (8). The feeding pipe (8) and the conveying pipe (13) are rotatably connected. The conveying pipe (13) is fixedly connected to the machine box (1). A blower (20) is connected to the top of the casing (1), and a blower pipe (21) is connected to the casing (1) corresponding to the blower (20). A discharge port (22) is connected to the bottom wall of the casing (1).

2. A flour material screening and mixing apparatus according to claim 1, wherein The end of the conveying pipe (13) is connected to a second drive motor (14), and a first spiral blade (15) is coaxially connected to the drive shaft of the second drive motor (14). The first spiral blade (15) is disposed inside the conveying pipe (13), and the upper end of the conveying pipe (13) is connected to a feed inlet (16).

3. A flour material screening and mixing apparatus according to claim 2, wherein The discharge end of the screening cylinder (2) is provided with a rotating roller (7). The rotating roller (7) is symmetrically arranged at the bottom of the screening cylinder (2). The rotating roller (7) is rotatably connected to the machine box (1). The rotating roller (7) is in contact with the screening cylinder (2).

4. A flour material screening and mixing apparatus according to claim 3, wherein The discharge end of the screening cylinder (2) is connected to a rotating door (17), and a locking assembly (18) is connected between the rotating door (17) and the screening cylinder (2). An observation window (19) is provided on the rotating door (17).

5. A flour material screening and mixing apparatus according to claim 4, wherein The screening cylinder (2) is trapezoidal in shape, and the diameter of the screening cylinder (2) gradually decreases from the feed end to the discharge end.

6. A flour material screening and mixing apparatus according to claim 1, wherein A discharge pipe (23) is connected to the discharge port (22). A third drive motor (24) is connected to the bottom of the discharge pipe (23). A second spiral blade (25) is coaxially connected to the drive shaft of the third drive motor (24). The second spiral blade (25) is disposed inside the discharge pipe (23). A discharge port (26) is opened on the side wall of the discharge pipe (23). The discharge pipe (23) is inclined to the bottom of the discharge port (26).

7. A flour material screening and mixing apparatus according to claim 1, wherein The bottom of the inner side of the chassis (1) is inclined, and a vibration motor (27) is connected to the bottom of the chassis (1); the bottom of each support leg (5) is connected to a buffer pad (6).

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