Mixing device capable of preventing powder segregation

Abstract

The utility model relates to a mixing device capable of preventing powder segregation, which comprises a mixing barrel, a discharge pipe arranged at the bottom of the mixing barrel, a stirring mechanism for stirring powder arranged in the mixing barrel and a rhombic plug block for plugging the discharge pipe, the outer end diameter of the rhombic plug block is larger than the inner diameter of the discharge pipe, the bottom of the rhombic plug block is fixedly connected with a vertical connecting rod, and the connecting rod is fixedly connected with the bottom of the rhombic plug block. The lower end of the connecting rod extends out of the discharging pipe, and a driving mechanism for driving the rhombic blocking block to move up and down is arranged on the mixing barrel. According to the utility model, the diamond-shaped blocking block is arranged in the mixing barrel, so that powder above the diamond-shaped blocking block is dispersed to the periphery through blocking of the diamond-shaped blocking block when the mixing barrel is used for blanking, light and heavy powder is uniformly distributed to the periphery and is blanked along the bottom wall of the mixing barrel, and the segregation phenomenon of the powder in the blanking process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy, in particular to a mixing device for preventing powder segregation. Background Art

[0002] Powder metallurgy is a process technology that produces metal powder or uses metal powder (or a mixture of metal powder and non-metallic powder) as raw material, and manufactures metal materials, composite materials and various types of products through forming and sintering.

[0003] The preparation of finished powder requires a mixing process in a mixer. When the existing mixer is discharging materials, it is very easy for the powder in the center of the cylinder to enter the bag first due to gravity, and the powder around it to enter the bag later. In addition, it is very easy for light powder to hang on the bottom wall of the mixer, which eventually leads to segregation of the finished product. In addition, the moisture in the powder will increase the occurrence of the hanging phenomenon. Therefore, the powder needs to be kept dry during mixing. Therefore, before adding the powder, it is usually necessary to dry the powder first, which is a cumbersome process. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a mixing device for preventing powder segregation to solve the above problems.

[0005] The utility model is realized through the following technical scheme: a mixing device for preventing powder segregation, comprising a mixing barrel, a discharge pipe is arranged at the bottom of the mixing barrel, a stirring mechanism for stirring powder is arranged in the mixing barrel, a diamond-shaped blocking block for blocking the discharge pipe is arranged in the mixing barrel, the outer end diameter of the diamond-shaped blocking block is larger than the inner diameter of the discharge pipe, and a driving mechanism for driving the diamond-shaped blocking block to move up and down is arranged on the mixing barrel.

[0006] In this scheme, a diamond-shaped block is arranged in the mixing barrel. When the mixing barrel is unloading, the powder above the diamond-shaped block is blocked by the diamond-shaped block, so that the powder is dispersed to the surroundings, and the light and heavy powders are evenly distributed on the surroundings and unloaded along the bottom wall of the mixing barrel, thereby avoiding the segregation of powder during the unloading process.

[0007] As an optimization, the driving mechanism is a vertically arranged telescopic cylinder, a vertical connecting rod is fixedly connected to the bottom of the diamond-shaped block, the lower end of the connecting rod extends to the outside of the discharge pipe, one end of the telescopic cylinder is connected to the mixing barrel, and the other end of the telescopic tube is connected to the connecting rod. This optimization scheme drives the connecting rod to move through the telescopic cylinder, thereby driving the diamond-shaped block to move up and down to control the discharge of materials.

[0008] As an optimization, the discharge pipe sleeve is provided with a collecting pipe, the lower end of the connecting rod extends into the collecting pipe and is fixedly connected to the inner wall of the collecting pipe, and the other end of the telescopic cylinder is fixedly connected to the collecting pipe. This optimization scheme makes the powder more concentrated when it is discharged from the discharge pipe through the collecting pipe, which is convenient for loading.

[0009] As an optimization, the stirring mechanism includes a driving motor fixed on the top of the mixing barrel, the output end of the driving motor extends into the mixing barrel and is fixedly connected to a rotating shaft, and a plurality of stirring rods are distributed on both sides of the rotating shaft.

[0010] As an optimization, a scraper is fitted on the inner bottom of the mixing barrel, and the scraper is fixedly connected to the stirring rod. When unloading the material in this optimization solution, the powder on the inner bottom wall is scraped by the scraper to prevent the powder from sticking to the wall.

[0011] As an optimization, the outer wall of the mixing barrel is surrounded by a heating coil. This optimization solution heats and dries the inside of the mixing barrel through the heating coil, dries the powder, reduces the generation of powder hanging on the wall, reduces the operation process, and is easy to use.

[0012] As an optimization, the outer wall of the mixing barrel is wrapped with a heat-insulating layer, and the heating coil is located in the heat-insulating layer. This optimization solution improves the drying effect by heat preservation.

[0013] As an optimization, at least two feed hoppers are provided on the top of the mixing barrel, and an electric valve is installed on the feed pipe of the feed hopper. This optimization scheme controls the powder feed amount through the electric valve, which facilitates the mixing of powder proportions.

[0014] The beneficial effects of the utility model are as follows: the mixing barrel is heated by the electric heating tube, and the powder can be directly dried, which reduces the drying process before mixing and improves production efficiency. By setting a diamond-shaped block in the mixing barrel, when the mixing barrel is unloading, the powder above the diamond-shaped block is blocked by the diamond-shaped block, so that the powder above the diamond-shaped block is dispersed to the surroundings, and the light and heavy powders are evenly distributed around and unloaded along the bottom wall of the mixing barrel. While unloading, the powder on the bottom wall is scraped by the scraper to prevent the powder from hanging on the wall, avoiding the phenomenon of powder segregation during the unloading process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the front view of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the utility model (diamond-shaped block in closed state);

[0017] Figure 3 This is a schematic diagram of the diamond block in the open state;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the diamond-shaped block;

[0019] As shown in the figure:

[0020] 1. Mixing barrel, 2. Stirring mechanism, 21. Driving motor, 22. Rotating shaft, 23. Stirring rod, 24. Scraper, 3. Diamond block, 4. Connecting rod, 5. Collecting pipe, 6. Telescopic cylinder, 7. Heating coil, 8. Insulation layer, 9. Electric valve, 10. Feed hopper, 11. Discharge pipe. DETAILED DESCRIPTION

[0021] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0022] like Figures 1 to 4 As shown, a mixing device for preventing powder segregation includes a mixing barrel 1, which is fixed to the ground by supporting legs, a discharge pipe 11 is provided at the bottom of the mixing barrel 1, and at least two feed hoppers 10 are provided at the top of the mixing barrel 1 to facilitate mixing of different powders. A feed pipe at the bottom of the feed hopper 10 is connected to the inner cavity of the mixing barrel 1, and an electric valve is installed on the feed pipe of the feed hopper 10.

[0023] The outer wall of the mixing barrel 1 is surrounded by a heating coil 7, which is fixed on the outer wall of the mixing barrel 1. In this embodiment, the heating method of the heating coil 7 is electric heating, which is a conventional technology and will not be described in detail. The outer wall of the mixing barrel 1 is covered with an insulation layer 8, and the heating coil 7 is located in the insulation layer 8 to reduce heat loss.

[0024] A stirring mechanism 2 for stirring powder is provided in the mixing barrel 1. Specifically, the stirring mechanism 2 includes a driving motor 21 fixed to the top of the mixing barrel 1, the output end of the driving motor 21 extends into the mixing barrel 1 and is fixedly connected to a vertical rotating shaft 22, and a plurality of stirring rods 23 are symmetrically distributed on both sides of the rotating shaft 22.

[0025] In this embodiment, the stirring rod 23 is arranged to be tilted downward, and a plurality of stirring rods 23 are distributed along the length direction on the same side of the rotating shaft 22. A scraper 24 is fitted on the inner bottom of the mixing barrel 1, and the scraper 24 is fixedly connected to the lowest stirring rod 23. The scraper scrapes the powder on the inner bottom wall to prevent the powder from sticking to the wall.

[0026] The mixing barrel 1 is provided with a diamond-shaped block 3 for blocking the discharge pipe 11. The outer diameter of the diamond-shaped block 3 is larger than the inner diameter of the discharge pipe 11. The upper and lower outer surfaces of the diamond-shaped block 3 in this embodiment are both conical, which is convenient for the powder to slide down. The mixing barrel 1 is provided with a driving mechanism for driving the diamond-shaped block to move up and down.

[0027] Specifically, the driving mechanism is a vertically arranged telescopic cylinder 6, a vertical connecting rod 4 is fixedly connected to the bottom of the diamond-shaped block, the lower end of the connecting rod 4 extends to the outside of the discharge pipe 11, one end of the telescopic cylinder 6 is connected to the mixing barrel 1, and the other end of the telescopic tube is connected to the connecting rod 4.

[0028] The discharge pipe 11 of this embodiment is sleeved with a collecting pipe 5, and the inner diameter of the collecting pipe 5 matches the outer diameter of the discharge pipe 11. The lower end of the connecting rod 4 extends downward into the collecting pipe 5 and is fixedly connected to the inner wall of the collecting pipe 5, and the other end of the telescopic cylinder 6 is fixedly connected to the collecting pipe 5.

[0029] The left and right sides of the discharge pipe 11 of the mixing barrel of this embodiment are fixedly connected with a first transverse fixed plate, and the left and right sides of the collecting pipe 5 are fixedly connected with a second transverse fixed plate. Two telescopic cylinders 6 are provided, one end of the telescopic cylinder 6 is fixedly connected to the first fixed plate, and the other end of the telescopic cylinder 6 is fixedly connected to the second fixed plate, thereby driving the collecting pipe 5 to move up and down.

[0030] Working principle: Place the powder to be mixed in the feed hopper 10, open the electric valve 9, and the powder enters the mixing barrel 1 for stirring. The powder is dried by the heating coil 7 to keep the powder dry and reduce the occurrence of wall hanging. After stirring and mixing by the stirring mechanism 2, the telescopic cylinder 6 contracts and drives the collecting pipe 5 to move upward, thereby driving the diamond block 3 to move upward to open the discharge pipe 11 for unloading. The powder above the diamond block 3 is blocked by the diamond block 3, and the light and heavy powders are evenly distributed around and unloaded along the bottom wall of the mixing barrel 1. At the same time, the stirring rod 23 drives the scraper 24 to rotate and scrape the powder on the bottom wall of the mixing barrel 1 to prevent the powder from hanging on the wall and avoid the segregation of the powder during the unloading process.

[0031] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A mixing device for preventing powder segregation, comprising a mixing barrel (1), a discharge pipe (11) being provided at the bottom of the mixing barrel (1), and a stirring mechanism (2) for stirring powder being provided inside the mixing barrel (1), characterized in that: The mixing barrel (1) is provided with a diamond-shaped block (3) for blocking the discharge pipe (11), the outer end diameter of the diamond-shaped block is larger than the inner diameter of the discharge pipe, and the mixing barrel (1) is provided with a driving mechanism for driving the diamond-shaped block to move up and down.

2. A mixing device for preventing powder segregation according to claim 1, characterized in that: The driving mechanism is a telescopic cylinder (6) arranged vertically, a vertical connecting rod (4) is fixedly connected to the bottom of the diamond-shaped block (3), the lower end of the connecting rod extends to the outside of the discharge pipe (11), one end of the telescopic cylinder is connected to the mixing barrel (1), and the other end of the telescopic pipe is connected to the connecting rod (4).

3. A mixing device for preventing powder segregation according to claim 2, characterized in that: A collecting pipe (5) is sleeved on the discharge pipe (11), the lower end of the connecting rod (4) extends into the collecting pipe (5) and is fixedly connected to the inner wall of the collecting pipe, and the other end of the telescopic cylinder (6) is fixedly connected to the collecting pipe (5).

4. A mixing device for preventing powder segregation according to claim 1, characterized in that: The stirring mechanism (2) comprises a driving motor (21) fixed to the top of the mixing barrel, the output end of the driving motor extending into the mixing barrel and fixedly connected to a rotating shaft (22), and a plurality of stirring rods (23) are distributed on both sides of the rotating shaft.

5. A mixing device for preventing powder segregation according to claim 4, characterized in that: The inner bottom of the mixing barrel (1) is fitted with a scraper (24), and the scraper is fixedly connected to the stirring rod (23).

6. A mixing device for preventing powder segregation according to claim 1, characterized in that: The outer wall of the mixing barrel (1) is surrounded by a heating coil (7).

7. A mixing device for preventing powder segregation according to claim 6, characterized in that: The outer wall of the mixing barrel (1) is wrapped with a thermal insulation layer (8), and the heating coil (7) is located inside the thermal insulation layer.

8. A mixing device for preventing powder segregation according to claim 1, characterized in that: At least two feed hoppers (10) are provided on the top of the mixing barrel (1), and electric valves (9) are installed on the feed pipes of the feed hoppers.

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