A screening device for powder processing

Abstract

The utility model discloses a kind of screening devices of powder processing, it is related to the screening device field of powder processing, including vibration box body, the support leg is fixedly installed in the bottom four around of vibration box body, vibration structure is fixedly installed in the bottom center position of vibration box body, the upper end of vibration box body is equipped with feed inlet, the first screening plate is movably installed in the inside upper end both sides of vibration box body, the second screening plate is movably installed in the inside below of vibration box body in the first screening plate, the inside rotation of guide slope center position in the bottom both sides of vibration box body is installed with screw rod, first motor is fixedly installed in the one end of screw rod, the bottom one side of vibration box body is integrally formed with extension pipe. The utility model uses above structure, prevent its blockage discharge channel, the continuous rotation of screw rod realizes the continuous conveying of powder, need not intermittent operation, improve overall production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of sieving devices for powder processing, and specifically relates to a sieving device for powder processing. Background Technology

[0002] In the field of powder processing, sieving devices are key equipment for achieving fine processing of materials. They are widely used in industries such as food, pharmaceuticals, and chemicals. They use sieves to classify and screen powders of different particle sizes, removing impurities and ensuring the uniformity of powder particles. This provides raw materials that meet quality standards for subsequent processing. As industries increase their requirements for the purity and precision of powders, sieving devices need to be adapted to various powder characteristics and combine vibration, airflow, and other auxiliary methods to improve screening efficiency. They play an important role in ensuring the stability of product quality in modern production lines.

[0003] Existing technologies have developed some sieving devices specifically for powder processing. For example, Chinese patent with publication number "CN208427347U" discloses "a powder sieving device" that uses a spray head to rinse the inside of the device body, washing out the residual powder inside the device body, and then uses a warm air blower to quickly dry the inside of the device body, ensuring that the quality of the powder is not affected and greatly extending the service life of the device.

[0004] Although the internal structure of the device is rinsed with spray nozzles to remove residual powder and then quickly dried with a warm air blower to ensure that the quality of the powder is not affected and to greatly extend the service life of the device, the first, second, and third discharge ports of the device lack anti-clogging design. Powder is prone to accumulate at the discharge ports due to static electricity or humidity. Especially when the upper and lower screen plates are tilted during conveying, the powder may cause blockage at the discharge ports, affecting screening efficiency. Moreover, cleaning the blockage requires stopping the machine and interrupting the processing flow. Utility Model Content

[0005] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a sieving device for powder processing to solve the problems of sieving devices in powder processing.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A sieving device for powder processing includes a vibrating box body. Support legs are fixedly installed around the bottom of the vibrating box body. A vibrating structure is fixedly installed at the center of the bottom of the vibrating box body. A feed inlet is provided at the upper end of the vibrating box body. A first sieve plate is movably installed on both sides of the upper end inside the vibrating box body. A second sieve plate is movably installed below the first sieve plate inside the vibrating box body. Guide slopes are provided on both sides of the bottom of the vibrating box body. A screw rod is rotatably installed inside the center of the guide slope. A first motor is fixedly installed at one end of the screw rod. An extension tube is integrally formed on one side of the bottom of the vibrating box body. The end of the screw rod away from the output shaft of the first motor is rotatably installed inside the extension tube. A discharge pipe is integrally formed at the bottom of the outer ring of the extension tube.

[0007] As a preferred technical solution, the vibration structure includes an outer protective plate, a second motor, a swing rod, and a stabilizer. The outer protective plate has an internal mounting groove, and the stabilizer is fixedly installed in the inner ring of the mounting groove. The second motor is fixedly installed at the bottom center of the stabilizer, and the swing rod is fixedly installed on the output shaft of the second motor.

[0008] As a preferred technical solution, the output shaft of the second motor passes through the center of the stabilizer frame and is fixedly connected to the swing rod, and the swing rod rotates on the side of the stabilizer frame away from the second motor.

[0009] As a preferred technical solution, buffer grooves are provided on both the upper and lower ends of the inside of the vibration box body. Multiple buffer springs are fixedly installed at the upper and lower ends of the buffer grooves. Buffer plates are fixedly installed on the opposite sides of the buffer springs at the upper and lower ends. The buffer plates are movably installed inside the buffer grooves by the springs.

[0010] As a preferred technical solution, both ends of the first and second sieve plates are integrally formed with raised plates, and multiple mounting holes are opened inside the raised plates on both sides.

[0011] As a preferred technical solution, the buffer plate has multiple internal threaded holes on the side away from the buffer groove, and the protruding plates are all attached to the side of the buffer plate away from the buffer groove. The internal threaded holes are threaded with screws.

[0012] As a preferred technical solution, a conveying groove is provided at the bottom of the guide slopes on both sides, and the spiral rod rotates at the bottom of the guide slope through the conveying groove. The output shaft of the first motor passes through one side of the vibration box body and is fixedly connected to one end of the spiral rod.

[0013] In summary, the present invention has the following main advantages: First, the rotation of the screw actively pushes the powder towards the discharge pipe, preventing the material from accumulating at the bottom. The rotation of the screw blades can break up small lumps, preventing them from blocking the discharge channel. The continuous rotation of the screw enables continuous conveying of the powder without the need for intermittent operation, thus improving overall production efficiency. Secondly, the buffer spring plays a role in damping and stabilizing during vibration transmission, avoiding damage to the device caused by rigid impact. By adjusting the spring's elastic coefficient, the amplitude of the sieve plate can be controlled to adapt to the screening requirements of powders with different properties, reduce fatigue damage to the device structure caused by vibration, and extend the service life of the equipment. Third, the screw conveyor mechanism consists of a screw rod, a first motor, a guide slope, and an extension pipe. When the powder falls into the bottom of the device through the sieve plate, it will accumulate on the guide slope. The inclined design of the guide slope allows the powder to slide naturally towards the bottom conveying trough. The screw rod rotates in the conveying trough, pushing the powder axially to the extension pipe, and finally discharged from the discharge pipe. The rotating screw blades generate friction with the powder particles, grabbing the material from the guide slope into the conveying trough. The continuous rotation of the screw blades forms an axial thrust, enabling the powder to overcome friction and its own weight, moving towards the discharge pipe. The closed structure of the extension pipe prevents powder leakage, ensuring the environmental friendliness and high efficiency of the conveying process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the vibration structure of this utility model; Figure 3 This is a schematic diagram of the internal cross-sectional structure of the vibration box body of this utility model; Figure 4 This is a utility model Figure 3 A magnified structural diagram of part A; Figure 5 This is a schematic diagram of the conveying trough structure of this utility model.

[0015] Reference numerals in the attached drawings: 1. Feed inlet; 2. Vibration box body; 3. Extension pipe; 4. Discharge pipe; 5. Vibration structure; 6. Support leg; 7. First motor; 8. Swinging rod; 9. Second motor; 10. Stabilizer; 11. Mounting groove; 12. First sieve plate; 13. Protruding plate; 14. Mounting hole; 15. Second sieve plate; 16. Guide slope; 17. Spiral rod; 18. Conveying trough; 19. Internal threaded hole; 20. Buffer spring; 21. Buffer groove; 22. Buffer plate; 23. Outer protective plate. Detailed Implementation

[0016] Example refer to Figures 1-5This embodiment of a powder processing sieving device includes a vibrating box body 2, with support legs 6 fixedly installed around the bottom of the vibrating box body 2, a vibrating structure 5 fixedly installed at the center of the bottom of the vibrating box body 2, a feed inlet 1 at the upper end of the vibrating box body 2, a first sieving plate 12 movably installed on both sides of the upper end inside the vibrating box body 2, a second sieving plate 15 movably installed below the first sieving plate 12 inside the vibrating box body 2, guide slopes 16 on both sides of the bottom inside the vibrating box body 2, a screw rod 17 rotatably installed inside the center of the guide slope 16, a first motor 7 fixedly installed at one end of the screw rod 17, an extension tube 3 integrally formed on one side of the bottom of the vibrating box body 2, the end of the screw rod 17 away from the output shaft of the first motor 7 rotatably installed inside the extension tube 3, and a discharge pipe 4 integrally formed at the bottom of the outer ring of the extension tube 3.

[0017] refer to Figures 2 to 3 The vibration structure 5 includes an outer protective plate 23, a second motor 9, a swing rod 8, and a stabilizer 10. The outer protective plate 23 has an installation groove 11 inside, and the stabilizer 10 is fixedly installed in the inner ring of the installation groove 11. The second motor 9 is fixedly installed at the bottom center of the stabilizer 10. The swing rod 8 is fixedly installed on the output shaft of the second motor 9. The output shaft of the second motor 9 passes through the center of the stabilizer 10 and is fixedly connected to the swing rod 8. The swing rod 8 rotates on the side of the stabilizer 10 away from the second motor 9. The second motor 9 drives the swing rod 8 to rotate at high speed. The eccentric design of the swing rod 8 generates centrifugal force when it rotates, thereby causing the entire vibrating box body 2 to vibrate. This vibration is transmitted to the first sieve plate 12 and the second sieve plate 15 through the buffer spring 20, causing the powder particles on the plate surface to move irregularly. Larger particles cannot pass through the sieve holes and move towards the discharge port along the inclined sieve plate, while smaller particles pass through the sieve holes and fall into the next stage sieve plate or the bottom of the device.

[0018] refer to Figures 3 to 4 The vibrating box body 2 has buffer grooves 21 on both sides and at the top and bottom. Multiple buffer springs 20 are fixedly installed at the top and bottom of the buffer grooves 21. Buffer plates 22 are fixedly installed on the opposite sides of the buffer springs 20. The buffer plates 22 are movably installed inside the buffer grooves 21 by the springs. The bottom of both ends of the first sieve plate 12 and the second sieve plate 15 are integrally formed with protruding plates 13. Multiple mounting holes 14 are opened inside the protruding plates 13 on both sides. Multiple internal threaded holes 19 are opened inside the side of the buffer plate 22 away from the buffer grooves 21. The protruding plates 13 are all attached to the side of the buffer plate 22 away from the buffer grooves 21. The internal threaded holes 19 are connected to screws. The buffer springs 20 play a role in damping and stabilizing during vibration transmission, avoiding damage to the device caused by rigid impact. By adjusting the elastic coefficient of the spring, the amplitude of the sieve plate can be controlled to adapt to the screening requirements of powders with different properties, reduce fatigue damage to the device structure caused by vibration, and extend the service life of the equipment.

[0019] refer to Figure 5 The bottom of the guide slopes 16 on both sides is provided with a conveying trough 18. The screw rod 17 rotates in the bottom of the guide slope 16 through the conveying trough 18. The output shaft of the first motor 7 passes through one side of the vibrating box body 2 and is fixedly connected to one end of the screw rod 17. When the powder falls into the bottom of the device through the sieve plate, it will accumulate on the guide slope 16. The inclined design of the guide slope 16 allows the powder to slide naturally to the bottom conveying trough 18. The screw rod 17 rotates in the conveying trough 18, pushing the powder axially to the extension pipe 3, and finally discharged from the discharge pipe 4. The rotating screw blades generate friction with the powder particles, grabbing the material from the guide slope 16 to the conveying trough 18. The continuous rotation of the screw blades forms an axial thrust, which makes the powder overcome friction and its own weight and move towards the discharge pipe 4. The closed structure of the extension pipe 3 prevents powder leakage and ensures the environmental protection and high efficiency of the conveying process.

[0020] Operating principle and advantages: During operation, the second motor 9 drives the swing rod 8 to rotate at high speed. The eccentric design of the swing rod 8 generates centrifugal force during rotation, causing the entire vibrating box body 2 to vibrate. This vibration is transmitted to the first sieve plate 12 and the second sieve plate 15 through the buffer spring 20, causing the powder particles on the plate surface to move irregularly. Larger particles cannot pass through the sieve holes and move towards the discharge port along the inclined sieve plate, while smaller particles pass through the sieve holes and fall into the next sieve plate or the bottom of the device. The buffer spring 20 plays a role in shock absorption and stabilization during vibration transmission, avoiding damage to the device caused by rigid impact. By adjusting the spring coefficient, the amplitude of the sieve plate can be controlled to adapt to the screening requirements of powders with different characteristics and reduce the impact of vibration on the device structure. To prevent fatigue damage and extend equipment lifespan, the screw conveyor mechanism consists of a screw rod 17, a first motor 7, a guide slope 16, and an extension pipe 3. When the powder falls into the bottom of the device through the sieve plate, it accumulates on the guide slope 16. The inclined design of the guide slope 16 allows the powder to slide naturally to the bottom conveying trough 18. The screw rod 17 rotates in the conveying trough 18, pushing the powder axially to the extension pipe 3, and finally discharging it from the discharge pipe 4. The rotating screw blades generate friction with the powder particles, grabbing the material from the guide slope 16 to the conveying trough 18. The continuous rotation of the screw blades generates axial thrust, enabling the powder to overcome friction and its own weight, moving towards the discharge pipe 4. The closed structure of the extension pipe 3 prevents powder leakage, ensuring the environmental friendliness and high efficiency of the conveying process.

Claims

1. A sieving device for powder processing, comprising a vibrating box body, characterized in that: Support legs are fixedly installed around the bottom of the vibrating box body. A vibration structure is fixedly installed at the center of the bottom of the vibrating box body. A feed inlet is provided at the top of the vibrating box body. A first sieve plate is movably installed on both sides of the upper part of the vibrating box body. A second sieve plate is movably installed below the first sieve plate inside the vibrating box body. Guide slopes are provided on both sides of the bottom of the vibrating box body. A screw rod is rotatably installed inside the center of the guide slope. A first motor is fixedly installed at one end of the screw rod. An extension tube is integrally formed on one side of the bottom of the vibrating box body. The end of the screw rod away from the output shaft of the first motor is rotatably installed inside the extension tube. A discharge pipe is integrally formed at the bottom of the outer ring of the extension tube.

2. The sieving device for powder processing according to claim 1, characterized in that: The vibration structure includes an outer protective plate, a second motor, a swing rod, and a stabilizer. The outer protective plate has an internal mounting groove, and the stabilizer is fixedly installed in the inner ring of the mounting groove. The second motor is fixedly installed at the bottom center of the stabilizer, and the swing rod is fixedly installed on the output shaft of the second motor.

3. The sieving device for powder processing according to claim 2, characterized in that: The output shaft of the second motor passes through the center of the stabilizer frame and is fixedly connected to the swing rod, which rotates on the side of the stabilizer frame away from the second motor.

4. The sieving device for powder processing according to claim 1, characterized in that: The vibration box body has buffer grooves on both sides at the top and bottom. Multiple buffer springs are fixedly installed at the top and bottom of the buffer grooves. Buffer plates are fixedly installed on the opposite sides of the buffer springs at the top and bottom. The buffer plates are movably installed inside the buffer grooves by the springs.

5. A sieving device for powder processing according to claim 4, characterized in that: Both ends of the first and second sieve plates are integrally formed with raised plates, and multiple mounting holes are opened inside the raised plates on both sides.

6. A sieving device for powder processing according to claim 5, characterized in that: The buffer plate has multiple internal threaded holes on the side away from the buffer groove. The protruding plates are all attached to the side of the buffer plate away from the buffer groove. The internal threaded holes are threaded with screws.

7. A sieving device for powder processing according to claim 1, characterized in that: The bottom of the guide slopes on both sides is provided with a conveying groove. The spiral rod rotates in the bottom of the guide slope through the conveying groove. The output shaft of the first motor passes through one side of the vibrating box body and is fixedly connected to one end of the spiral rod.

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