A new type of aluminum powder crushing device

Abstract

The utility model relates to the technical field of aluminium powder production equipment, especially to a new type aluminium powder reducing mechanism, including primary reducing mechanism and secondary reducing mechanism, primary reducing mechanism includes reducing box, and two broken rollers are rotatably installed in reducing box, secondary reducing mechanism includes cylinder, and ball mill jar is rotatably installed in cylinder, and a plurality of grinding bodies are distributed in ball mill jar, first, aluminium material is roughly ground into aluminium particle of big granule through broken roller, and then aluminium particle is impacted into fine aluminium powder through grinding body in ball mill jar, secondary grinding, layer by layer progression, greatly reduce the ball mill time needed by ball mill jar, through preparation efficiency, and the power consumption needed by ball mill jar drive is greater than broken roller power consumption, and relatively speaking, preparation cost is saved, ball mill jar is equipped with the supporting plate, makes the grinding body under the action of centrifugal force height higher, thereby making the impact force of the grinding body falling greater, and the aluminium powder is reduced faster, and the ball mill efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum powder production equipment, and in particular to a novel aluminum powder crushing device. Background Technology

[0002] Aluminum powder is an odorless, silvery-white metallic powder and a type of metallic pigment. Aluminum powder particles are relatively fine. Typically, aluminum is fed into a ball mill, where it is continuously crushed by the impact of steel balls. The resulting finely ground aluminum powder then seeps out of the mill. However, it's important to note that while traditional ball mills rotate during operation, causing the steel balls to tumble and impact, the rotational speed of the mill is limited. Most of the steel balls move at the bottom, resulting in a lower effective number of impacting balls than actually required, thus affecting grinding efficiency. Furthermore, directly feeding the raw aluminum material into the ball mill, especially if the aluminum material itself is relatively large, will require a longer grinding time. The process is lengthy and inefficient. Furthermore, the continuous impact of the steel balls during ball milling generates heat, which can cause aluminum powder to ignite, affecting production and damaging machinery, posing a safety hazard. Therefore, grinding aids, such as a mixture of 60% stearic acid and 40% petroleum hydrocarbons, kerosene, or wire drawing oil, are injected into the ball mill to coat the aluminum particles and prevent spontaneous combustion. Once the aluminum powder reaches a certain size, it is discharged from the ball mill along with the grinding aid and then transferred to a separation device for further separation. This process is not only cumbersome but also reduces production efficiency.

[0003] Therefore, this utility model provides a novel aluminum powder pulverizing device to improve the production efficiency of aluminum powder ball milling. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing a new type of aluminum powder crushing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A novel aluminum powder pulverizing device includes a primary pulverizing device for coarse grinding and a secondary pulverizing device for fine grinding. The primary crushing device includes a crushing box, inside which two crushing rollers are rotatably installed. The two crushing rollers rotate relative to each other. The bottom of the crushing box has a tapered design, and a feeding pipe is connected to the bottom of the crushing box. The secondary crushing device includes a cylinder, a ball mill jar is rotatably installed inside the cylinder, several grinding media are distributed inside the ball mill jar, the ball mill jar is connected to a feeding pipe, and a water supply system is connected inside the ball mill jar for continuously conveying grinding aids. Multiple support plates are arranged in a ring on the inner wall of the ball mill jar, and a collecting cavity is provided in the lower part of the cylinder, with a discharge port at the bottom of the collecting cavity.

[0006] Preferably, the ball mill jar is fixed with a rotating shaft at both ends, and the two rotating shafts are rotatably connected to both ends of the cylinder.

[0007] Preferably, the discharge port is connected to an electric three-way valve, and the other two ports of the electric three-way valve are connected to a centrifuge tank with an opening at the bottom. A centrifuge cylinder is rotatably installed inside the centrifuge tank. The centrifuge cylinder is driven by a centrifuge motor fixed on the centrifuge tank. Several fine mesh holes are evenly distributed on the side wall of the centrifuge cylinder. A discharge pipe is provided at the bottom of the centrifuge cylinder, and an electric valve is provided at the port of the discharge pipe.

[0008] Preferably, the water supply system includes a ring pipe, which is embedded in the end side wall of the feed pipe. The ring pipe has multiple spray holes evenly distributed on the side facing the ball mill jar, and a water supply pipe is connected to the other side.

[0009] Preferably, a feeding pump is connected between the two ends of the feeding pipe.

[0010] Preferably, the tray is a spiral plate.

[0011] Preferably, the two ends of the spiral plate abut against the inner walls of the two sides of the ball mill jar, and the number of spiral plate turns is less than 1.

[0012] Preferably, the connection point between the centrifuge tank and the electric three-way valve is located inside the centrifuge cylinder.

[0013] Preferably, a first gear is fixed to the upper side wall of the centrifuge cylinder, the first gear meshes with a second gear, and the second gear is fixed to the output shaft of the centrifuge motor.

[0014] Preferably, both the centrifuge cylinder and the centrifuge tank have a tapered bottom design.

[0015] Compared with the prior art, this utility model provides a novel aluminum powder pulverizing device, which has the following beneficial effects: 1. This utility model includes a primary crushing device and a secondary crushing device. First, the aluminum material is coarsely ground into large aluminum particles by the crushing roller of the primary crushing device. Then, the aluminum particles are impacted into fine aluminum powder by the grinding media in the ball mill jar of the secondary crushing device. The two-stage grinding is progressively advanced. Compared with directly placing the aluminum material into the ball mill, this method greatly reduces the ball milling time required by the ball mill jar and improves the production efficiency. The power consumption required to drive the ball mill jar is greater than the power consumption of the crushing roller, which saves production costs.

[0016] 2. The grinding aid is continuously sprayed into the ball mill jar through the water supply system to ensure that the content of the grinding aid is sufficient to coat all the aluminum powder, so that the aluminum powder does not come into direct contact with the air, thereby avoiding the combustion of aluminum powder. At the same time, under the action of the grinding aid, the aluminum powder has fluidity in the ball mill jar, preventing agglomeration and adhesion, thereby improving the grinding effect, that is, improving the fineness of aluminum powder.

[0017] 3. The bottom of the cylinder is connected to a centrifuge tank. Through centrifugation, the grinding aid is separated from the aluminum powder. The crushing box, ball mill tank and centrifuge tube are designed to be connected vertically, eliminating the need for material transfer and distribution. Direct feeding and separation improves preparation efficiency and saves transportation costs and time.

[0018] 4. The ball mill jar is equipped with a support plate, which allows the grinding media to rise higher under centrifugal force, resulting in a greater impact force when the grinding media falls, faster aluminum powder crushing, and improved ball milling efficiency.

[0019] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

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

[0021] Figure 2 For the present utility model Figure 1 A partial schematic diagram of point A.

[0022] Figure 3 This is a full sectional view of the present invention.

[0023] Figure 4 For the present utility model Figure 3 A partial schematic diagram of point B.

[0024] Figure 5 This is a cross-sectional schematic diagram of the centrifuge tank of this utility model.

[0025] Figure 6 For the present utility model Figure 5 A schematic diagram at point C.

[0026] In the diagram: 1. Crushing box; 2. Crushing roller; 3. Feeding pipe; 4. Cylinder; 5. Ball mill jar; 6. Rotating shaft; 7. Ring pipe; 8. Water supply pipe; 9. Support plate; 10. Electric three-way valve; 11. Centrifuge tank; 12. Centrifuge cylinder; 13. First gear; 14. Second gear; 15. Discharge pipe; 16. Electric valve; 17. Gathering chamber. Detailed Implementation

[0027] The following will refer to the appendix in the embodiments of this utility model. Figure 1-6 The technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0028] Example 1: In order to solve the problems existing in the prior art, this example provides a novel aluminum powder pulverizing device, including a primary pulverizing device and a secondary pulverizing device, wherein the pulverized particles of the primary pulverizing device are larger than those of the secondary pulverizing device. The primary crushing device includes a crushing box 1, in which two crushing rollers 2 are rotatably installed. The two crushing rollers 2 mesh with each other, and gears are fixed at the ends of the two crushing rollers 2. The two gears mesh with each other, and one of the gears is driven by a motor, so that the two crushing rollers 2 rotate relative to each other. The bottom end of the crushing box 1 is connected to a feeding pipe 3. The bottom end of the crushing box 1 is designed to be constricted towards the feeding pipe 3, so that the crushed aluminum particles can be gathered towards the feeding pipe 3. The secondary grinding device includes a cylinder 4, with rotating shafts 6 rotatably mounted at both ends of the cylinder 4. A grinding jar 5 is fixed between the two rotating shafts 6. The right rotating shaft 6 is driven by a drive device, which rotates the grinding jar 5. The drive device includes, but is not limited to, a drive device composed of a motor and a gearbox. Several grinding media, such as steel balls and steel segments, are distributed inside the grinding jar 5. Multiple support plates 9 are arranged in a ring on the inner wall of the grinding jar 5. The left rotating shaft 6 has a through hole penetrating the left side wall of the grinding jar 5. Multiple U-shaped frames are spaced around the through hole on the left side wall of the cylinder 4. One side of the U-shaped frame is cantilevered and fixed to the side wall of the cylinder 4. One side cantilever extends into the through hole, and multiple U-shaped frame cantilever arms are fixedly connected to the ring pipe 7. The ring pipe 7 has multiple spray holes evenly distributed on the side facing the inside of the ball mill jar 5, and the other side is connected to the water supply pipe 8. The water supply pipe 8 is connected to the grinding aid storage tank through the pump. The grinding aid storage tank, pump, water supply pipe 8, and ring pipe 7 together form a water supply system for replenishing the grinding aid. The end of the feeding pipe 3 in the primary crushing device passes through the axis of the ring pipe 7 into the ball mill jar 5. The cylinder 4 is provided with a collecting cavity 17 located below the ball mill jar 5. The collecting cavity 17 is funnel-shaped, and the lowest end of the bottom wall of the collecting cavity 17 is connected to an electric three-way valve 10. The other two ports of the electric three-way valve 10 are connected to centrifuge tanks 11. Centrifuge tank 11 is open at the bottom and a centrifuge cylinder 12 is rotatably installed inside the centrifuge tank 11. The centrifuge cylinder 12 is open at the top. The connection between the centrifuge tank 11 and the electric three-way valve 10 is located within the centrifuge cylinder 12. A centrifuge motor is fixed on the upper surface of the centrifuge tank 11, located on the side of the centrifuge cylinder 12. The output shaft of the centrifuge motor is inserted into the centrifuge tank 11. A second gear 14 is fixed on the output shaft of the centrifuge motor. The second gear 14 meshes with a first gear 13. The first gear 13 is fixed on the upper side wall of the centrifuge cylinder 12. The side wall of the centrifuge cylinder 12 is evenly distributed with several fine mesh holes. A discharge pipe 15 is provided at the bottom of the centrifuge cylinder 12. An electric valve 16 is provided at the port of the discharge pipe 15 to control the opening and closing of the discharge pipe 15.

[0029] The specific usage process of this embodiment is as follows: Aluminum material is fed into the crushing chamber 1. Under the interlocking action of two crushing rollers 2, the aluminum material is crushed into larger particles. These larger aluminum particles enter the ball mill jar 5 through the feeding pipe 3. As the ball mill jar 5 rotates, the grinding media rises along the side wall inside the jar 5 under the action of the support plate 9. When they reach a certain height, they fall freely and impact the aluminum particles. The support plate 9 further elevates the grinding media, resulting in a greater impact force on the aluminum particles upon impact. The greater the impact force, the more thoroughly the aluminum particles are broken, improving the ball mill efficiency. This secondary crushing and pulverization of the aluminum particles reduces the amount of material needed in the ball mill jar 5. The ball milling time improves the preparation efficiency, while the power consumption required to drive the ball mill jar 5 is greater than that of the crushing roller 2, thus saving preparation costs. While the ball mill jar 5 is rotating, the water supply system is started, and the grinding aid is injected into the ring pipe 7 through the water supply pipe 8. Then, the grinding aid is sprayed into the ball mill jar 5 from the nozzle of the ring pipe 7. After the grinding aid comes into contact with the aluminum powder, it forms a protective film on the surface of the aluminum powder, so that the aluminum powder does not come into direct contact with the air, thereby avoiding the combustion of the aluminum powder. At the same time, under the action of the grinding aid, the aluminum powder has fluidity in the ball mill jar 5, avoiding agglomeration and adhesion, thereby improving the grinding effect, that is, improving the fineness of the aluminum powder. Aluminum powder that meets the fineness requirements is discharged from the ball mill jar 5 along with the grinding aid, and then gathers at the lowest point of the lower end of the cylinder 4 along the collecting cavity 17. It is then transported to the electric three-way valve 10. The electric three-way valve 10 opens, allowing the aluminum powder-grinding aid viscous liquid to enter the centrifuge cylinder 12. The centrifuge motor starts and drives the centrifuge cylinder 12 to rotate at high speed through the first gear 13 and the second gear 14, with a speed exceeding 10,000 rpm. This causes the grinding aid to be thrown out and separated from the aluminum powder. The grinding aid flows down the side wall of the centrifuge jar 11. After the centrifuge motor stops, the electric valve 16 opens, and the aluminum powder flows out from the discharge pipe 15. The two sets of centrifuge equipment are set up to centrifuge in batches. After one centrifuge jar 11 reaches its capacity limit, it is transported to the other centrifuge jar 11. This batch and side operation improves production efficiency. The drawing oil can be recycled after separation.

[0030] In this embodiment, both the crushing box 1 and the cylinder 4 are fixed to the foundation by a bracket (this is a basic mounting frame, which is easy for technicians to set up and is shown in the attached drawings), and are arranged vertically.

[0031] In this embodiment, both the centrifuge cylinder 12 and the centrifuge tank 11 have a tapered opening at the bottom to facilitate material discharge.

[0032] In Example 2, a cone bottom is provided at the upper end of the crushing roller 2 inside the crushing box 1. The outlet of the cone bottom is located at the biting point of the two crushing rollers 2, so that the material is accurately dropped into the biting point of the two crushing rollers 2 after being fed in and is completely crushed, avoiding any residue.

[0033] In Example 3, a sealing measure is taken at the through hole to prevent the grinding media, aluminum powder particles, and grinding aid from overflowing from the through hole, and at the same time to prevent outside air from entering the ball mill jar 5, so as to prevent the aluminum material from contacting oxygen and oxidizing rapidly after being crushed into small particles.

[0034] Example 4: A feeding pump is connected between the two ends of the feeding pipe 3 to ensure feeding efficiency.

[0035] In Example 5, the support plate 9 is a spiral plate, with both ends of the spiral plate abutting against the inner walls of both sides of the ball mill jar 5. The spiral plate has fewer than 1 turns or is wavy, which causes the grinding media to fall irregularly, preventing the uniform motion of the grinding media from reducing the grinding efficiency. In addition, the number of support plates 9 is less than 4, so that the horizontal projections of adjacent support plates 9 do not overlap, reducing the probability of the grinding media falling and hitting the support plate 9, while leaving space for the grinding media to impact.

[0036] In Example 6, multiple stirring rods are evenly distributed on the top wall of the centrifuge tank 11 inside the centrifuge cylinder 12, which causes the aluminum powder viscous liquid to be tumbled during centrifugation, thereby improving centrifugation efficiency.

[0037] Example 7: The water supply system not only supplies grinding aids, but can also be filled with inert gas, which can also inhibit the spontaneous combustion and oxidation of aluminum powder.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A novel aluminum powder pulverizing device, characterized in that, It includes a primary grinding unit for coarse grinding and a secondary grinding unit for fine grinding; The primary crushing device includes a crushing box (1), in which two crushing rollers (2) are rotatably installed. The two crushing rollers (2) rotate relative to each other. The bottom of the crushing box (1) is designed with a tapered opening, and the bottom of the crushing box (1) is connected to a feeding pipe (3). The secondary crushing device includes a cylinder (4), a ball mill jar (5) is rotatably installed inside the cylinder (4), a number of grinding media are distributed inside the ball mill jar (5), the ball mill jar (5) is connected to the feeding pipe (3), and a water supply system is connected inside the ball mill jar (5) for continuously conveying grinding aids. Multiple trays (9) are arranged in a ring on the inner wall of the ball mill jar (5), and a collecting cavity (17) is provided at the bottom of the cylinder (4), with a discharge port at the bottom of the collecting cavity (17).

2. The novel aluminum powder pulverizing device according to claim 1, characterized in that, The ball mill jar (5) has two rotating shafts (6) fixed at both ends, and the two rotating shafts (6) are rotatably connected to the two ends of the cylinder (4).

3. The novel aluminum powder pulverizing device according to claim 2, characterized in that, The discharge port is connected to an electric three-way valve (10). The other two ports of the electric three-way valve (10) are connected to a centrifuge tank (11) with an opening at the bottom. A centrifuge cylinder (12) is rotatably installed inside the centrifuge tank (11). The centrifuge cylinder (12) is driven by a centrifuge motor fixed on the centrifuge tank (11). Several fine mesh holes are evenly distributed on the side wall of the centrifuge cylinder (12). A discharge pipe (15) is provided at the bottom of the centrifuge cylinder (12). An electric valve (16) is provided at the port of the discharge pipe (15).

4. The novel aluminum powder pulverizing device according to claim 2, characterized in that, The water supply system includes a ring pipe (7), which is embedded in the end side wall of the feed pipe (3). The ring pipe (7) has multiple spray holes evenly distributed on the side facing the ball mill jar (5), and the other side is connected to a water supply pipe (8).

5. The novel aluminum powder pulverizing device according to claim 1, characterized in that, A feed pump is connected between the two ends of the feed pipe (3).

6. The novel aluminum powder pulverizing device according to claim 1, characterized in that, The tray (9) is a spiral plate.

7. A novel aluminum powder pulverizing device according to claim 6, characterized in that, The two ends of the spiral plate abut against the inner walls of both sides of the ball mill jar (5), and the number of spiral plate turns is less than 1.

8. A novel aluminum powder pulverizing device according to claim 3, characterized in that, The centrifuge tank (11) and the electric three-way valve (10) are connected inside the centrifuge cylinder (12).

9. A novel aluminum powder pulverizing device according to claim 8, characterized in that, The centrifuge tube (12) has a first gear (13) fixed on the upper side wall, the first gear (13) meshes with a second gear (14), and the second gear (14) is fixed on the output shaft of the centrifuge motor.

10. A novel aluminum powder pulverizing device according to claim 8, characterized in that, Both the centrifuge tube (12) and the centrifuge tank (11) have a tapered opening design at the bottom.

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