A super-fine hard alloy spray granulation device with vibration blanking function

Abstract

The utility model relates to powder metallurgy technical field, concretely relates to a kind of superfine hard alloy spray granulation device with vibration blanking function, including support frame, spray granulation tower, mounting plate, feed hopper, first motor and rotating rod etc., spray granulation tower is installed in support frame upper portion, feed hopper is equipped in spray granulation tower top left side, mounting plate is respectively equipped on the left and right two side walls of spray granulation tower upper portion, first motor is fixedly connected with left side on spray granulation tower upper portion, the output shaft of first motor is connected with a rotating rod of horizontal arrangement right, the right end of rotating rod penetrates spray granulation tower inside, and from the right side of spray granulation tower comes out.The utility model passes through protruding block to promote connecting block and drive sieve tray up and down vibration, destroy superfine particle agglomeration, prevent bridge plugging, solved the problem that superfine powder is easily adhered in traditional granulation device, poor mobility leads to unsmooth blanking.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy technology, and in particular to an ultrafine cemented carbide spray granulation device with vibration feeding function. Background Technology

[0002] Ultrafine cemented carbide, as a high-performance engineering material, is widely used in the manufacture of precision cutting tools, mining tools for geological drilling, and various wear-resistant parts that serve under harsh conditions due to its extremely high hardness, excellent wear resistance, and outstanding bending strength. It plays a vital role in modern industrial production. In its preparation process, spray granulation technology is an indispensable core step. This process atomizes a uniformly mixed cemented carbide slurry at high speed to form a large number of micron-sized fine droplets, which are then fully contacted with high-temperature airflow in a large drying tower. This allows the solvent to evaporate and be removed in a very short time, ultimately forming a free-flowing powder with excellent flowability, concentrated particle size distribution, and good sphericity. This provides a uniform and stable high-quality raw material base for subsequent automatic pressing and sintering densification processes.

[0003] However, when processing ultrafine or nanoscale cemented carbide powders, traditional spray granulation devices are prone to particle agglomeration due to the large specific surface area and high surface energy of the powders. This often results in soft particles sticking together, bridging, or accumulating on the walls of the conical feeding section and outlet of the tower, causing severe blockages. This not only hinders the smooth discharge of materials and reduces production efficiency, but also requires frequent shutdowns for manual cleaning, disrupting the continuity and automation of production, increasing operation and maintenance costs, and potentially causing batch-to-batch product quality fluctuations, affecting the consistency of product performance.

[0004] Therefore, it is necessary to design an ultrafine cemented carbide spray granulation device with vibration feeding function to solve the above-mentioned technical problems. Utility Model Content

[0005] To overcome the shortcomings of traditional spray granulation devices, such as poor material feeding and frequent blockages caused by the easy agglomeration of ultrafine cemented carbide powder, which requires shutdown for cleaning and affects production efficiency, continuity and product quality, this utility model provides an ultrafine cemented carbide spray granulation device with vibration feeding function.

[0006] The technical solution of this utility model is: an ultrafine hard alloy spray granulation device with vibration feeding function, comprising a support frame, a spray granulation tower, a mounting plate, a feed hopper, a first motor, a rotating rod, a protrusion, a limiting rod, a sieve plate, a connecting block, and a spring. The spray granulation tower is mounted on the upper part of the support frame. A feed hopper is located on the top left side of the spray granulation tower. Mounting plates are respectively located on the left and right side walls of the upper part of the spray granulation tower. The first motor is fixedly connected to the upper left side of the spray granulation tower. A horizontally arranged rotating rod is connected to the output axis of the first motor to the right. The right end of the rotating rod penetrates into the interior of the spray granulation tower. The rotating rod extends from the right side of the spray granulation tower, with both ends rotatably connected to the corresponding mounting plates. Protrusions are fixedly connected to both ends of the rotating rod. Limiting rods are installed inside both mounting plates. A sieve disc is slidably connected to the upper part of the spray granulation tower. Connecting blocks are installed on both sides of the sieve disc. Two connecting blocks extend horizontally through the left and right side walls of the spray granulation tower and are slidably connected to the corresponding limiting rods. The connecting blocks are slidably connected to the side walls of the spray granulation tower. The two protrusions rotatably contact the bottom of the corresponding connecting blocks. Springs are fitted onto the limiting rods between the two connecting blocks and the corresponding mounting plates.

[0007] Optionally, it also includes a connecting rod, a first bevel gear, a second motor, a second bevel gear, and a screw conveyor. A vertically arranged connecting rod is rotatably connected to the middle of the spray granulation tower. The top of the connecting rod extends upward through the spray granulation tower and is fixedly connected to the first bevel gear. A second motor is fixedly connected to the right side of the top of the spray granulation tower. The output shaft of the second motor is connected to the second bevel gear. The first bevel gear and the second bevel gear mesh with each other. A screw conveyor is installed at the lower part of the connecting rod.

[0008] Optionally, the sieve disc has multiple sieve holes evenly distributed on it, the connecting rod passes downward through the middle of the sieve disc and is slidably connected to the sieve disc, and the rotating rod passes horizontally through the connecting rod and is rotatably connected to the connecting rod.

[0009] Optionally, it also includes a hopper, a baffle, a fixing block, and a limiting block. The bottom of the spray granulation tower is provided with a hopper, a baffle is slidably connected to the middle of the hopper, a fixing block is provided on the lower front side of the hopper, and a limiting block is slidably connected inside the fixing block. The limiting block is slidably connected to the hopper and the baffle respectively.

[0010] Optionally, it also includes a collection box, which is placed under the support frame and located directly below the hopper.

[0011] Optionally, it also includes transparent windows, with transparent windows fixedly connected to the front and rear side walls of the upper part of the spray granulation tower.

[0012] Compared with the prior art, the present invention has the following advantages: 1. The present invention uses the protrusion to push the connecting block to drive the screen plate to vibrate up and down, thereby breaking the agglomeration of ultrafine particles, preventing bridging and clogging, and solving the problem of easy adhesion and poor flowability of ultrafine powder in traditional granulation devices, which leads to poor material feeding.

[0013] 2. This utility model uses a second motor to drive the spiral conveyor rod to rotate, which pushes and stirs the falling particles. This works in conjunction with the vibration of the screen plate to effectively prevent the discharge port from accumulating and clogging, thus ensuring the continuity and stability of the feeding process.

[0014] 3. This utility model facilitates observation of the working conditions inside the spray granulation tower by setting a transparent window, and controls the discharge speed and achieves sealing by cooperating with the baffle and limit block, thus achieving the effects of easy regulation, anti-blocking and shutdown sealing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of the spray granulation tower of this utility model.

[0017] Figure 3 This is a schematic diagram of the covering structure for the first motor, rotating rod, and protrusion components of this utility model.

[0018] Figure 4 This is a schematic diagram of the covering structure for components such as the connecting rod, the first bevel gear, and the second motor of this utility model.

[0019] Figure 5 This is a schematic diagram of the planar structure of the sieve plate, connecting block, and spring components of this utility model.

[0020] Reference numerals: 1. Support frame; 2. Spray granulation tower; 201. Mounting plate; 202. Discharge hopper; 3. Feed hopper; 4. First motor; 5. Rotating rod; 6. Protrusion; 7. Limiting rod; 8. Screen plate; 9. Connecting block; 10. Spring; 11. Connecting rod; 12. First bevel gear; 13. Second motor; 14. Second bevel gear; 15. Screw conveyor rod; 16. Baffle; 17. Fixing block; 18. Limiting block; 19. Collection box; 20. Transparent window. Detailed Implementation

[0021] Example: An ultrafine cemented carbide spray granulation device with vibration feeding function, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the system includes a support frame 1, a spray granulation tower 2, a mounting plate 201, a feed hopper 3, a first motor 4, a rotating rod 5, a protrusion 6, a limiting rod 7, a screen plate 8, a connecting block 9, and a spring 10. The spray granulation tower 2 is mounted on the upper part of the support frame 1. The feed hopper 3 is located on the top left side of the spray granulation tower 2. Mounting plates 201 are respectively located on the left and right side walls of the upper part of the spray granulation tower 2. The first motor 4 is mounted on the upper left side of the spray granulation tower 2 by screws. A horizontally positioned rotating rod 5 is connected to the right side of the output shaft of the first motor 4. The right end of the rotating rod 5 penetrates into the interior of the spray granulation tower 2 and exits from the right side of the spray granulation tower 2. The two ends of the rotating rod 5... The rotating rod 5 is rotatably connected to the corresponding mounting plate 201. The left and right ends of the rotating rod 5 are respectively welded with protrusions 6. The two mounting plates 201 are each provided with a limiting rod 7. The upper part of the spray granulation tower 2 is slidably connected with a screen plate 8. Multiple screen holes are evenly opened on the screen plate 8. The left and right sides of the screen plate 8 are respectively provided with connecting blocks 9. The two connecting blocks 9 are horizontally protruding through the left and right side walls of the spray granulation tower 2 and are slidably connected with the corresponding limiting rods 7. The connecting blocks 9 are slidably connected to the side walls of the spray granulation tower 2. The two protrusions 6 are respectively in rotatable contact with the bottom of the corresponding connecting blocks 9. The two connecting blocks 9 are respectively fitted with springs 10 on the limiting rods 7 between the corresponding mounting plates 201.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, it also includes a connecting rod 11, a first bevel gear 12, a second motor 13, a second bevel gear 14, and a screw conveyor 15. A vertically arranged connecting rod 11 is rotatably connected to the middle of the spray granulation tower 2. The connecting rod 11 passes downward through the middle of the screen plate 8 and is slidably connected to the screen plate 8. A rotating rod 5 passes horizontally through the connecting rod 11 and is rotatably connected to the connecting rod 11. The top of the connecting rod 11 extends upward through the spray granulation tower 2 and is welded with the first bevel gear 12. The second motor 13 is installed on the top right side of the spray granulation tower 2 by screws. The output shaft of the second motor 13 is connected to the second bevel gear 14. The first bevel gear 12 and the second bevel gear 14 mesh with each other. A screw conveyor 15 is installed at the lower part of the connecting rod 11.

[0023] For example, body 1, Figure 2 and Figure 4 As shown, it also includes a hopper 202, a baffle 16, a fixing block 17, and a limiting block 18. The bottom of the spray granulation tower 2 is provided with a hopper 202. The baffle 16 is slidably connected to the middle of the hopper 202. The fixing block 17 is provided on the lower front side of the hopper 202. The limiting block 18 is slidably connected inside the fixing block 17. The limiting block 18 is slidably connected to the hopper 202 and the baffle 16 respectively.

[0024] like Figure 1 , Figure 2 and Figure 4As shown, it also includes a collection box 19 and a transparent window 20. The collection box 19 is placed at the bottom of the support frame 1. The collection box 19 is located directly below the feed hopper 202. The transparent windows 20 are glued to the front and rear side walls of the upper part of the spray granulation tower 2.

[0025] When this device is needed, firstly, the pre-prepared ultrafine hard alloy slurry is injected into the spray granulation tower 2 through the feed hopper 3. Simultaneously, the first motor 4 is started. The output shaft of the first motor 4 drives the rotating rod 5 connected to it to begin rotating at a uniform speed. As the rotating rod 5 rotates, the two protrusions 6 also perform circular motion. During the rotation, the protruding parts of the protrusions 6 periodically contact the bottom of the connecting block 9 located directly above them. Since the connecting block 9 horizontally extends through the left and right side walls of the spray granulation tower 2, and... The connecting block 9 is slidably connected to the corresponding limiting rod 7, thus restricting its movement in the vertical direction. When the protruding part of the protrusion 6 contacts the connecting block 9, it applies an upward thrust, pushing the connecting block 9 to overcome the elastic force of the spring 10 and slide upward along the limiting rod 7. When the protrusion 6 rotates to the lowest point and continues to rotate, its contact surface with the connecting block 9 gradually separates. At this time, the spring 10 releases its elastic potential energy, pushing the connecting block 9 to return to its original position downward. The continuous rotation of the protrusion 6 causes the connecting block 9 to perform reciprocating vertical motion under its action.

[0026] The connecting block 9 is connected to the screen plate 8 located inside the spray granulation tower 2. Therefore, the vertical reciprocating motion of the connecting block 9 is directly transmitted to the screen plate 8, causing the screen plate 8 to generate high-frequency vertical vibration in the upper part of the spray granulation tower 2. This vibration effectively breaks the agglomeration structure of ultrafine hard alloy particles formed on the surface of the screen plate 8 or in the feeding channel, preventing material bridging and blockage, and ensuring that the granulated particles can flow smoothly downwards, thus realizing the core function of vibration-assisted feeding.

[0027] Meanwhile, in order to further promote the discharge of materials and prevent bottom accumulation, the second motor 13 is started. The output shaft of the second motor 13 drives the second bevel gear 14 to rotate. The second bevel gear 14 meshes with the first bevel gear 12 fixed at the top of the vertical connecting rod 11, thereby transmitting power to the connecting rod 11, causing it to rotate in the middle of the spray granulation tower 2. The lower part of the connecting rod 11 is equipped with a spiral conveying rod 15, which acts like a screw when rotating, continuously pushing and stirring the falling particles downwards, effectively preventing blockage of the discharge port. Together with the vibration function of the screen plate 8, it ensures the continuity and stability of the entire feeding process.

[0028] During the granulation process, the liquid material is dried into granules in the spray granulation tower 2. After being screened and guided by the sieve plate 8 and vibrated, it is pushed by the screw conveyor 15 and finally discharged from the discharge hopper 202 at the bottom of the spray granulation tower 2. The operator can first remove the limiting block 18 used to fix the baffle 16, and then pull the baffle 16 to open the discharge hopper 202, so that the liquid material can be discharged smoothly, preventing the discharge from being too fast or blocked. The discharged granules fall into the collection box 19 located directly below the discharge hopper 202, completing the entire collection process.

[0029] Throughout the operation, the operator can also observe the vibration of the screen plate 8, the flow of the material, and the drying effect in real time through the transparent windows 20 installed on the front and rear side walls of the upper part of the spray granulation tower 2. This allows for timely adjustment of process parameters to ensure product quality. When shutdown is required, first turn off the first motor 4 and the second motor 13. After all moving parts, such as the protrusion 6, the screw conveyor 15, and the screen plate 8, have completely stopped, push the baffle 16 to close it and seal the discharge hopper 202, thus completing the shutdown operation. Necessary cleaning and maintenance can be performed afterward. The next time it is used, follow the above steps.

Claims

1. A spray granulation device for ultrafine hard alloys with vibration feeding function, characterized in that: The system includes a support frame (1), a spray granulation tower (2), a mounting plate (201), a feed hopper (3), a first motor (4), a rotating rod (5), a protrusion (6), a limiting rod (7), a screen plate (8), a connecting block (9), and a spring (10). The spray granulation tower (2) is mounted on the upper part of the support frame (1). The feed hopper (3) is located on the left side of the top of the spray granulation tower (2). Mounting plates (201) are located on the left and right side walls of the upper part of the spray granulation tower (2). The first motor (4) is fixedly connected to the left side of the upper part of the spray granulation tower (2). A horizontally arranged rotating rod (5) is connected to the right side of the output shaft of the first motor (4). The right end of the rotating rod (5) enters the interior of the spray granulation tower (2) and exits from the right side of the spray granulation tower (2). The two ends of the moving rod (5) are rotatably connected to the corresponding mounting plate (201). The left and right ends of the rotating rod (5) are fixedly connected to the protrusions (6). The two mounting plates (201) are equipped with limit rods (7). The upper part of the spray granulation tower (2) is slidably connected to the screen plate (8). The left and right sides of the screen plate (8) are respectively equipped with connecting blocks (9). The two connecting blocks (9) are horizontally protruding through the left and right side walls of the spray granulation tower (2) and slidably connected to the corresponding limit rods (7). The connecting blocks (9) are slidably connected to the side wall of the spray granulation tower (2). The two protrusions (6) are rotatably contacted with the bottom of the corresponding connecting blocks (9). The limit rods (7) between the two connecting blocks (9) and the corresponding mounting plates (201) are fitted with springs (10).

2. The ultrafine cemented carbide spray granulation device with vibration feeding function according to claim 1, characterized in that: It also includes a connecting rod (11), a first bevel gear (12), a second motor (13), a second bevel gear (14), and a screw conveyor (15). A vertically arranged connecting rod (11) is rotatably connected to the middle of the spray granulation tower (2). The top of the connecting rod (11) extends upward through the spray granulation tower (2) and is fixedly connected to the first bevel gear (12). The second motor (13) is fixedly connected to the right side of the top of the spray granulation tower (2). The output shaft of the second motor (13) is connected to the second bevel gear (14). The first bevel gear (12) and the second bevel gear (14) mesh with each other. A screw conveyor (15) is installed at the lower part of the connecting rod (11).

3. The ultrafine cemented carbide spray granulation device with vibration feeding function according to claim 2, characterized in that: Multiple sieve holes are evenly opened on the sieve plate (8). The connecting rod (11) passes downward through the middle of the sieve plate (8) and is slidably connected with the sieve plate (8). The rotating rod (5) passes horizontally through the connecting rod (11) and is rotatably connected with the connecting rod (11).

4. The ultrafine cemented carbide spray granulation device with vibration feeding function according to claim 3, characterized in that: It also includes a hopper (202), a baffle (16), a fixing block (17) and a limiting block (18). The bottom of the spray granulation tower (2) is provided with a hopper (202). A baffle (16) is slidably connected in the middle of the hopper (202). A fixing block (17) is provided on the lower front side of the hopper (202). A limiting block (18) is slidably connected inside the fixing block (17). The limiting block (18) is slidably connected to the hopper (202) and the baffle (16) respectively.

5. The ultrafine cemented carbide spray granulation device with vibration feeding function according to claim 4, characterized in that: It also includes a collection box (19), which is placed under the support frame (1) and is located directly below the hopper (202).

6. The ultrafine cemented carbide spray granulation device with vibration feeding function according to claim 5, characterized in that: It also includes transparent windows (20), and transparent windows (20) are fixedly connected to the front and rear side walls of the upper part of the spray granulation tower (2).

Images