A device for improving the tap density of stainless steel powder

Abstract

The utility model discloses a device that improves the vibration density of stainless steel powder, which comprises a base, four L-shaped fixing columns are fixedly connected to the upper surface of the base, a precipitation tank is fixedly connected to one end of the four L-shaped fixing columns, a protective cover is fixedly connected to one side of the precipitation tank, a controller is fixedly installed on one side of the protective cover, and a shearing structure is arranged on the protective cover. The utility model is provided with a servo motor, a rotating shaft, a rotating rod, a shearing rod and a gear, etc. The servo motor drives the rotating shaft to rotate, a pair of intermeshing gears drive two rotating rods to rotate towards each other in the precipitation tank, two groups of staggered shearing rods fixedly connected to the rotating rods rotate at high speed, the shearing rods strongly stir and shear the slurry, completely break the powder agglomerates, make the dispersing agent fully contact with the surface of the powder, complete the modification, and thus improve the vibration density of the stainless steel powder.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel powder tapping technology, and in particular to a device for improving the tapping density of stainless steel powder. Background Technology

[0002] The tap density of stainless steel powder is a key physical property indicator that directly affects its application in powder metallurgy, 3D printing, and other fields. Currently, water atomization is the mainstream process for preparing stainless steel powder. However, the submicron fine powder generated during this process adheres to the surface of larger particles, forming "satellite powder" and hard agglomerates, which severely degrades the powder's flowability and makes it difficult to improve the tap density. To remove these harmful submicron powders, a wet classification process is often used in industry. This involves mixing the atomized and passivated powder with water and then separating it in a sedimentation tank by gravity.

[0003] However, in the existing technology, the adhesion formed between submicron powder and micron-sized particles due to van der Waals forces cannot be effectively broken. These fine powders are not in a free state, but are "hanging" on the large particles, which makes it impossible to effectively float and separate during the settling process. In the end, most of them still remain in the main product. To address this, a device for improving the tap density of stainless steel powder is proposed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device for improving the tap density of stainless steel powder.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a device for improving the tap density of stainless steel powder, comprising a base, four L-shaped fixing columns fixedly connected to the upper surface of the base, a sedimentation tank fixedly connected to one end of the four L-shaped fixing columns, a protective cover fixedly connected to one side of the sedimentation tank, a controller fixedly installed on one side of the protective cover, a shearing structure provided on the protective cover, a limit frame fixedly connected to the upper surface of the sedimentation tank, a fixing plate fixedly connected to the upper surface of the limit frame, a pushing structure provided on the fixing plate, and a guide groove fixedly connected to one side of the sedimentation tank; The shearing structure includes a rotating shaft rotatably connected to one side of the inner side of the protective cover, and a servo motor fixedly connected to the outer side of the protective cover. The output shaft of the servo motor is fixedly connected to one end of the rotating shaft. The servo motor is electrically connected to a controller, and the controller controls the servo motor to start, thereby driving the rotating shaft to rotate.

[0006] As a further description of the above technical solution: The sedimentation tank has two rotating rods inside, each of which is fixedly connected to a set of shearing rods. The two sets of shearing rods are staggered and rotate at high speed to strongly stir and shear the slurry, thoroughly breaking up powder agglomerates and ensuring that the dispersant is in full contact with the powder surface.

[0007] As a further description of the above technical solution: One end of each of the rotating rods extends into the interior of the protective cover and is fixedly connected to a gear. The two gears mesh with each other, and one side of one of the gears is fixedly connected to one end of the rotating shaft. The two rotating rods are driven to rotate in opposite directions inside the sedimentation tank by a pair of meshing gears.

[0008] As a further description of the above technical solution: The pushing structure includes a first electric push rod fixedly connected to one side of the fixed plate. A sliding column is fixedly connected to the piston end of the first electric push rod. The first electric push rod is electrically connected to the controller. The controller controls the first electric push rod to start, so that the piston end of the first electric push rod pushes the sliding column to move.

[0009] As a further description of the above technical solution: Two sets of support blocks are fixedly connected to the upper surface of the limiting frame. Each set of support blocks has a sliding rod fixedly connected to one side of the opposite side. Both sliding rods pass through one side of the sliding column and are slidably connected. The sliding column moves horizontally along the sliding rod to one end of the sedimentation tank, so that the scraper below moves horizontally and accurately scrapes the concentrated submicron powder sludge layer floating on the liquid surface into the guide channel.

[0010] As a further description of the above technical solution: The upper surface of the slide column is slidably connected to two limiting posts. Each limiting post has a limiting disc fixedly connected to its upper surface. The bottom of the two limiting posts is fixedly connected to a scraper. The upper surface of the slide column is fixedly connected to a second electric push rod. The piston end of the second electric push rod is fixedly connected to the upper surface of the scraper. When the second electric push rod is activated, it pushes the scraper downward so that its lower edge is immersed below the liquid surface.

[0011] As a further description of the above technical solution: A liquid inlet pipe is fixedly connected to one side of the sedimentation tank, and a first valve is installed on the liquid inlet pipe. A discharge pipe is fixedly connected to the other side of the sedimentation tank, and a second valve is installed on the discharge pipe. A very dilute dispersant solution is slowly added to the sedimentation tank again through the liquid inlet pipe. The solution added this time will rise from the bottom, generating a gentle upward water flow, which will further push the submicron powder suspended in the middle liquid column to the liquid surface, forming a thicker and more viscous submicron powder sludge layer.

[0012] This utility model has the following beneficial effects: 1. Compared with the prior art, this device for improving the tap density of stainless steel powder is equipped with a servo motor, a rotating shaft, rotating rods, shearing rods, and gears. The servo motor drives the rotating shaft to rotate, and a pair of meshing gears drive two rotating rods to rotate in opposite directions in the settling tank. This causes two sets of staggered shearing rods fixedly connected to the rotating rods to rotate at high speed, which strongly stirs and shears the slurry, thoroughly breaking up powder agglomerates and ensuring that the dispersant fully contacts the powder surface to complete the modification, thereby improving the tap density of stainless steel powder.

[0013] 2. Compared with the prior art, this device for improving the tap density of stainless steel powder is equipped with a first electric push rod, a sliding column, a limiting column, a limiting plate, a scraper, a second electric push rod, a support block, and a sliding rod. When the second electric push rod is activated, it pushes the scraper downward so that its lower edge is immersed below the liquid surface. Then, the first electric push rod is activated, pushing the sliding column to move horizontally along the sliding rod to one end of the sedimentation tank, so that the scraper below moves horizontally and accurately scrapes the concentrated submicron powder sludge layer floating on the liquid surface into the guide channel, thereby completely separating it from the main product. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a device for improving the tap density of stainless steel powder according to the present invention. Figure 2 This is a cross-sectional view of a device for improving the tap density of stainless steel powder according to the present invention. Figure 3 This is a schematic diagram of the shearing structure of a device for improving the tap density of stainless steel powder according to the present invention. Figure 4 An exploded view of the shear structure of a device for improving the tap density of stainless steel powder proposed in this utility model; Figure 5 A schematic diagram of the pushing structure of a device for improving the tap density of stainless steel powder proposed in this utility model; Figure 6 An exploded view of the pushing structure of a device for improving the tap density of stainless steel powder proposed in this utility model.

[0015] Legend: 1. Base; 2. L-shaped fixing column; 3. Sedimentation tank; 4. Protective cover; 5. Controller; 6. Shearing structure; 601. Servo motor; 602. Rotating shaft; 603. Rotating rod; 604. Shearing rod; 605. Gear; 7. Limiting frame; 8. Fixing plate; 9. Pushing structure; 901. First electric push rod; 902. Sliding column; 903. Limiting column; 904. Limiting plate; 905. Scraper; 906. Second electric push rod; 907. Support block; 908. Sliding rod; 10. Liquid inlet pipe; 11. Discharge pipe; 12. Guide channel. Detailed Implementation

[0016] 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.

[0017] Reference Figures 1 to 6 This utility model provides a device for improving the tap density of stainless steel powder: It includes a base 1, with four L-shaped fixing columns 2 fixedly connected to the upper surface of the base 1. A sedimentation tank 3 is fixedly connected to one end of each of the four L-shaped fixing columns 2. A protective cover 4 is fixedly connected to one side of the sedimentation tank 3. A controller 5 is fixedly installed on one side of the protective cover 4. A shearing structure 6 is provided on the protective cover 4. A limit frame 7 is fixedly connected to the upper surface of the sedimentation tank 3. A fixing plate 8 is fixedly connected to the upper surface of the limit frame 7. A pushing structure 9 is provided on the fixing plate 8. A guide channel 12 is fixedly connected to one side of the sedimentation tank 3. An inlet pipe 10 is connected to the sedimentation tank 3, and a first valve is installed on the inlet pipe 10. A discharge pipe 11 is fixedly connected to the other side of the sedimentation tank 3, and a second valve is installed on the discharge pipe 11. A very dilute dispersant solution is slowly added to the sedimentation tank 3 again through the inlet pipe 10. The solution added this time will rise from the bottom, generating a gentle upward water flow, which will push the submicron powder suspended in the middle liquid column to the liquid surface, forming a thicker and more viscous submicron powder sludge layer. The high tap density micron-level stainless steel powder slurry located at the bottom of the sedimentation tank 3 can be discharged through the discharge pipe 11 for subsequent dewatering and drying treatment. To achieve the purpose of stirring and shearing, the shearing structure 6 includes a rotating shaft 602 rotatably connected to one side of the inner side of the protective cover 4, a servo motor 601 fixedly connected to the outer side of the protective cover 4, the output shaft of the servo motor 601 being fixedly connected to one end of the rotating shaft 602, and the servo motor 601 being electrically connected to the controller 5. Inside the sedimentation tank 3, two rotating rods 603 are rotatably connected, each rotating rod 603 having a set of shearing rods 604 fixedly connected to it. The two sets of shearing rods 604 are staggered, and one end of each rotating rod 603 extends into the interior of the protective cover 4 and is fixedly connected. There is a gear 605, and two gears 605 mesh with each other. One side of one gear 605 is fixedly connected to one end of the rotating shaft 602. The servo motor 601 drives the rotating shaft 602 to rotate. Through a pair of meshing gears 605, two rotating rods 603 are driven to rotate in opposite directions in the sedimentation tank 3. This causes two sets of staggered shearing rods 604 fixedly connected to the rotating rods 603 to rotate at high speed, which strongly stirs and shears the slurry, thoroughly breaks up the powder agglomerates, and makes the dispersant fully contact the powder surface to complete the modification, thereby improving the tap density of the stainless steel powder. To achieve the pushing purpose, the pushing structure 9 includes a first electric push rod 901 fixedly connected to one side of the fixed plate 8. A sliding column 902 is fixedly connected to the piston end of the first electric push rod 901. The first electric push rod 901 is electrically connected to the controller 5. Two sets of support blocks 907 are fixedly connected to the upper surface of the limiting frame 7. A sliding rod 908 is fixedly connected to the opposite side of each set of support blocks 907. Both sliding rods 908 pass through one side of the sliding column 902 and are slidably connected. Two limiting posts 903 are slidably connected through the upper surface of the sliding column 902. A limiting plate 904 is fixedly connected to the upper surface of each limiting post 903. A scraper 905 is fixedly connected to the bottom of column 903. A second electric push rod 906 is fixedly connected to the upper surface of sliding column 902. The piston end of the second electric push rod 906 is fixedly connected to the upper surface of scraper 905. When the second electric push rod 906 is activated, it pushes scraper 905 downward so that its lower edge is immersed below the liquid surface. Then, the first electric push rod 901 is activated, pushing sliding column 902 to move horizontally along sliding rod 908 to one end of sedimentation tank 3, so that scraper 905 below moves horizontally and precisely scrapes the concentrated submicron powder sludge layer floating on the liquid surface into guide channel 12, thereby completely separating it from the main product.

[0018] Working principle: Atomized and passivated stainless steel powder and water are injected into the settling tank 3 through the inlet pipe 10. Dispersant is added in proportion. The controller 5 controls the servo motor 601 to start, which drives the rotating shaft 602 to rotate. Through a pair of meshing gears 605, two rotating rods 603 rotate in opposite directions inside the settling tank 3. This causes two sets of staggered shearing rods 604 fixed to the rotating rods 603 to rotate at high speed, which strongly stirs and shears the slurry, thoroughly breaking up powder agglomerates and ensuring that the dispersant fully contacts the powder surface to complete the modification, thereby increasing the tap density of the stainless steel powder. After stirring stops, the slurry enters the static settling stage in the settling tank 3. After dispersion and modification, the micron-sized main product powder quickly settles to the bottom of the settling tank 3, while the released submicron powder slowly floats to the surface. Then, it is slowly added back into the settling tank 3 through the inlet pipe 10. A very dilute dispersant solution is added. The solution rises from the bottom, creating a gentle upward flow that pushes the submicron powder suspended in the middle liquid column further to the surface, forming a thicker, more viscous submicron powder sludge layer. When the clear, viscous sludge layer is higher than the upper surface of the settling tank 3, the second electric push rod 906 is activated, pushing the scraper 905 downward so that its lower edge is submerged below the liquid surface. Then, the first electric push rod 901 is activated, pushing the slide column 902 horizontally along the sliding rod 908 to one end of the settling tank 3, causing the scraper 905 below to move horizontally and precisely scrape the concentrated submicron powder sludge layer floating on the liquid surface into the guide channel 12, thereby completely separating it from the main product. After separation, the high-density micron-level stainless steel powder slurry at the bottom of the settling tank 3 can be discharged through the discharge pipe 11 for subsequent dewatering and drying.

[0019] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for improving the tap density of stainless steel powder, comprising a base (1), characterized in that: Four L-shaped fixing columns (2) are fixedly connected to the upper surface of the base (1). One end of the four L-shaped fixing columns (2) is fixedly connected to a sedimentation tank (3). A protective cover (4) is fixedly connected to one side of the sedimentation tank (3). A controller (5) is fixedly installed on one side of the protective cover (4). A shearing structure (6) is provided on the protective cover (4). A limit frame (7) is fixedly connected to the upper surface of the sedimentation tank (3). A fixing plate (8) is fixedly connected to the upper surface of the limit frame (7). A pushing structure (9) is provided on the fixing plate (8). A guide channel (12) is fixedly connected to one side of the sedimentation tank (3). The shearing structure (6) includes a rotating shaft (602) rotatably connected to one side inside the protective cover (4). A servo motor (601) is fixedly connected to the outer side of the protective cover (4). The output shaft of the servo motor (601) is fixedly connected to one end of the rotating shaft (602). The servo motor (601) is electrically connected to the controller (5).

2. The device for improving the tap density of stainless steel powder according to claim 1, characterized in that: The sedimentation tank (3) has two rotating rods (603) inside, and each of the rotating rods (603) is fixedly connected to a set of shearing rods (604), and the two sets of shearing rods (604) are intersecting.

3. The device for improving the tap density of stainless steel powder according to claim 2, characterized in that: One end of each of the rotating rods (603) extends into the interior of the protective cover (4) and is fixedly connected to a gear (605). The two gears (605) mesh with each other, and one side of one of the gears (605) is fixedly connected to one end of the rotating shaft (602).

4. The device for improving the tap density of stainless steel powder according to claim 1, characterized in that: The pushing structure (9) includes a first electric push rod (901) fixedly connected to one side of the fixed plate (8), a slide rod (902) fixedly connected to the piston end of the first electric push rod (901), and the first electric push rod (901) is electrically connected to the controller (5).

5. The device for improving the tap density of stainless steel powder according to claim 4, characterized in that: The upper surface of the limiting frame (7) is fixedly connected to two sets of support blocks (907). Each set of support blocks (907) is fixedly connected to a sliding rod (908) on the opposite side. Both sliding rods (908) pass through one side of the sliding column (902) and are slidably connected.

6. The device for improving the tap density of stainless steel powder according to claim 4, characterized in that: The upper surface of the slide column (902) is slidably connected to two limiting columns (903). Each limiting column (903) has a limiting plate (904) fixedly connected to its upper surface. The bottom of the two limiting columns (903) is fixedly connected to a scraper (905). The upper surface of the slide column (902) is fixedly connected to a second electric push rod (906). The piston end of the second electric push rod (906) is fixedly connected to the upper surface of the scraper (905).

7. The device for improving the tap density of stainless steel powder according to claim 1, characterized in that: A liquid inlet pipe (10) is fixedly connected to one side of the sedimentation tank (3), and a first valve is installed on the liquid inlet pipe (10). A discharge pipe (11) is fixedly connected to the other side of the sedimentation tank (3), and a second valve is installed on the discharge pipe (11).

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