Soft magnetic ferrite powder pelletizing and screening device
By adopting an open discharge port and material conveying mechanism in the screening device, combined with the symmetrical arrangement of the vibrating motor and the reinforced support structure, the problem of particle adhesion and agglomeration in the screening device is solved, achieving efficient screening and stable operation, and reducing the cleaning frequency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-04
- Publication Date
- 2026-03-17
AI Technical Summary
When screening soft magnetic ferrite powder, existing linear vibrating screens are prone to particles adhering to the bottom plate due to water vapor and water droplets, forming clumps, which affects screening efficiency and requires frequent cleaning of the screening device to maintain normal operation.
Design an open screening device, including a screening box with an open bottom, a screening device, and a screening structure. The structure of the screening device adopts an open discharge port and a material conveying mechanism. Particle materials fall directly from the bottom of the screening box into the conveying mechanism to avoid adhesion. Combined with the symmetrical arrangement of the vibrating motor and the reinforced support structure, the screening stability and efficiency are ensured.
It effectively prevents particles from sticking to the bottom of the screening device, reduces cleaning frequency, improves screening efficiency, ensures stable operation of the screening device for a long time, and reduces maintenance work.
Smart Images
Figure CN223996557U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a spherical material screening device, and more particularly to a soft magnetic ferrite powder spheroidizing and screening device. Background Technology
[0002] Soft magnetic ferrite is the raw material for preparing soft magnetic ferrite cores. Its dry production process generally includes batching, mixing, pelletizing, pre-firing, pulping, granulation, and packaging. In the pelletizing process, the mixed powder is combined with pure water and then processed into spherical materials of varying sizes using an automatic pelletizing machine. After screening, qualified pellets enter the pre-firing process, while unqualified pellets are recycled for reuse.
[0003] Existing linear vibrating screens all have a closed bottom, with the screened material discharged from one side outlet. Because the spherical materials produced by automatic pelletizing machines have high moisture and temperature, water vapor and droplets easily precipitate when passing through the relatively sealed linear vibrating screen. Due to the closed bottom of the screen, particles falling to the bottom need to undergo a certain movement process to reach the outlet on one side. Since the particles at the bottom of the screen have the smallest diameter, they easily adhere to the bottom plate of the screen under the influence of water droplets, preventing them from moving further under vibration. After prolonged operation, these particles form clumps on the bottom plate that are difficult to remove. Failure to clean them reduces the screening space and eventually leads to screen blockage. To ensure continuous and effective operation, staff need to regularly clean the bottom and side walls of the screen, thus affecting screening efficiency. Utility Model Content
[0004] The purpose of this invention is to provide a soft magnetic ferrite powder pelletizing and screening device. The screening device has an open bottom design, which prevents bottom agglomeration, thus facilitating continuous screening over a long period of time and improving screening efficiency.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a soft magnetic ferrite powder pelletizing and screening device, including a linear vibrating screen, the linear vibrating screen including a screening box and a vibrating motor, a box cover is provided on the upper part of the screening box, and a feed port corresponding to the feed end of the screening box is provided on the box cover. A primary screen and a secondary screen are arranged sequentially from top to bottom inside the screening box. The screening device also includes a material conveying mechanism. The bottom of the screening box is in an open state, and an open discharge port is provided at the bottom of the screening box. The granular material falling from the bottom of the screening box is guided by the open discharge port and falls into the material conveying mechanism. The material conveying mechanism is used to realize the directional conveying of the material falling into it. The screening box is distributed in a left-low and right-high state, and the two vibrating motors are arranged symmetrically on the front and rear sides of the screening box.
[0006] Preferably, the upper part of the open discharge port is a hollow quadrangular truncated cone that runs vertically through the center, and the lower part of the open discharge port is a rectangular frame that runs vertically through the center. The rectangular frame is fixedly installed at the lower part of the hollow quadrangular truncated cone.
[0007] Furthermore, a reinforcing support plate is fixedly installed on both the front and rear sides of the bottom of the screening box. The outer side of the reinforcing support plate and the outer side of the screening box are fixedly connected by several reinforcing ribs. A motor mounting plate is fixedly installed on the outer side of the joint between the reinforcing support plate and the screening box.
[0008] Furthermore, a reinforcing rib plate is provided on both the left and right sides of the bottom of the screening box, and the front and rear sides of the reinforcing rib plate are fixedly connected to the corresponding reinforcing support plate. A reinforcing crossbeam is fixedly provided between the two motor mounting plates, and the reinforcing crossbeam passes through the hollow quadrangular frustum.
[0009] Furthermore, the screening box is mounted on the screening support by four vibration damping springs, and the material conveying mechanism is located below the open discharge port.
[0010] Furthermore, the material conveying mechanism includes a conveying bracket, a conveying belt, a conveying belt support plate, and a driving mechanism. The conveying bracket is located inside the screening bracket. The conveying belt and the conveying belt support plate are both mounted on the conveying bracket, and the conveying belt support plate is used to support the running section of the conveying belt. The driving mechanism is mounted on the conveying bracket and is used to drive the conveying belt to rotate.
[0011] Furthermore, the longitudinal cross-section of the conveyor belt support plate is ︺-shaped, and the longitudinal cross-section of the running section of the conveyor belt, supported by the conveyor belt support plate, is also ︺-shaped.
[0012] The beneficial effects of this utility model are as follows: This utility model has a simple structure and is convenient to process and manufacture; the bottom of the screening box is designed with an open shape, so small-diameter particles falling from the secondary screen directly enter the open discharge port and fall directly onto the conveyor belt through the guide of the open discharge port. This prevents small-diameter particles from sticking to the bottom of the screening box and from forming sticky blocks at the bottom after long-term operation, which can greatly reduce the cleaning frequency of the box and thus improve screening efficiency; the running section of the conveyor belt is shaped like a ︺. After small-diameter particles fall onto the conveyor belt, the particles move towards the center of the conveyor belt, thus avoiding material run-off or leakage and achieving effective and stable conveying of particles. The vibratory motors are symmetrically arranged front and rear and rotate in opposite directions during operation, thus effectively preventing the screening box from vibrating back and forth while ensuring material conveying. The use of reinforcing ribs, reinforcing plates, and reinforcing beams can improve the structural strength of the screening box, thereby ensuring stable screening operation. The large open discharge port facilitates airflow between the open discharge port and the inlet, which helps to remove some water vapor using the flowing airflow, thereby reducing the adhesion of particles to the vertical side walls of the screening box and thus reducing the frequency of cleaning the screening box. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the material conveying mechanism;
[0016] Figure 3 This is a schematic diagram of the structure of a linear vibrating screen;
[0017] Figure 4 This is a schematic diagram of the transverse cross-section of the screening box;
[0018] Figure 5 This is a schematic diagram of the longitudinal section of the conveyor belt and the conveyor belt support plate;
[0019] Figure 6 for Figure 2 Enlarged view of point A in the middle;
[0020] In the diagram: 1 Linear vibrating screen, 11 Screening box, 111 Reinforcing support plate, 112 Reinforcing rib, 12 Vibrating motor, 121 Motor mounting plate, 13 Box cover, 131 Feed inlet, 14 Open discharge port, 141 Hollow quadrangular truncated pyramid, 142 Rectangular frame, 15 Reinforcing rib plate, 16 Reinforcing crossbeam, 171 Upper discharge port, 172 Lower discharge port, 18 Spring bracket, 191 Primary screen, 192 Secondary screen, 2 Material conveying mechanism, 21 Conveying bracket, 22 Conveying belt, 23 Conveying belt support plate, 231 Horizontal plate, 232 Right angle support frame, 2321 Guide plate, 24 Drive mechanism, 3 Screening bracket, 31 Vibration damping spring. Detailed Implementation
[0021] The following will describe specific embodiments and appendices. Figure 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some preferred embodiments of this utility model, and not all embodiments. Those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0022] This utility model provides a soft magnetic ferrite powder pelletizing and screening device (such as...). Figure 1As shown), it includes a linear vibrating screen 1, which is a known mature technology product in the prior art. The vibrating screening principle of the linear vibrating screen 1 will not be described in detail. The linear vibrating screen 1 includes a screening box 11 and a vibrating motor 12. The vibrating motor 12 is a mature technology product in the prior art. The detailed structure and operating principle of the vibrating motor 12 will not be described in detail. A cover 13 is provided on the upper part of the screening box 11. In practical applications, the cover 13 is snapped onto the upper part of the screening box 11, and the periphery of the cover 13 is fixed to the upper outer edge of the screening box 11 using several bolts (not shown in the attached drawing for clarity). An inlet 131 corresponding to the feed end of the screening box 11 is provided on the cover 13. In practical applications, the raw material to be screened continuously enters the inlet 131 through the inlet 131, thereby continuously carrying out subsequent screening work. Inside the screening box 11... The screening box 11 is equipped with a primary screen 191 and a secondary screen 192 arranged sequentially from top to bottom. The primary screen 191 is used to screen out unqualified large-diameter particles, and the secondary screen is used to screen out directly qualified particles. Small-diameter particles smaller than qualified particles pass directly through the screen holes of the secondary screen 192. In practical applications, an upper discharge port 191 and a lower discharge port 192 are arranged on the left side of the screening box 11. The upper discharge port 191 is used to guide the output of large-diameter particles flowing out of the primary screen 191, and the lower discharge port 192 is used to guide the output of qualified-diameter particles flowing out of the secondary screen 192. The screening device also includes a material conveying mechanism 2. The bottom of the screening box 11 is in an open state, that is, the bottom of the screening box 11 is provided with a relatively large opening. The ratio of the opening area to the bottom area of the screening box 11 is in the range of 0.7-0.9:1. In this specific embodiment, the ratio of the opening area to the bottom area of the screening box 11 is 0.8:1; During screening, small-diameter particles flowing out of the screen holes of the secondary screen 192 are directly discharged from the bottom opening of the screening box 11 under the action of gravity. This eliminates the phenomenon of small-diameter particles flowing at the bottom of the screening box 11, effectively preventing their adhesion to the bottom plate and thus preventing the formation of clumps. The absence of clumps reduces the cleaning frequency of the screening box 11. Cleaning of the screening box 11 mainly involves removing a small amount of adhering material from the vertical sidewalls. An open discharge port 14 is provided at the bottom of the screening box 11. Particles falling from the bottom of the screening box 11 are guided by the open discharge port 14 and fall onto the material conveying mechanism 2. The upper and lower openings of the open discharge port 14 are relatively large, allowing some small-diameter particles to pass through without needing to interact with the open discharge port. The material falls onto the material conveying mechanism upon contact with the side wall of the discharge port 14, which can effectively reduce the phenomenon of sticking blocks on the side wall of the open discharge port 14. The discharge port of the open discharge port 14 has a guiding and gathering effect on small diameter particles, so that the material flowing out of the open discharge port 14 can fall into the material conveying mechanism 2. In this specific embodiment, the specific implementation of the open discharge port 14 is as follows: the upper part of the open discharge port 14 is a hollow quadrangular frustum 141 that runs vertically through the center, and the lower part of the open discharge port 14 is a rectangular frame 142 that runs vertically through the center. The rectangular frame 142 is fixedly installed at the lower part of the hollow quadrangular frustum 141. The material conveying mechanism 2 is used to realize the directional conveying of the material falling into it. The screening box 11 is distributed in a left-low and right-high state, and the two vibration motors 12 are arranged symmetrically on the front and rear sides of the screening box 11. In practical applications, the eccentric oscillators of the two vibrating motors 12 are initially positioned at the same point. During vibration operation, the two eccentric oscillators synchronously reverse direction, thereby applying a stable excitation force to the screening box 11 and achieving stable vibration of the screening box 11. Simultaneously, the two vibrating motors 12 are distributed front to back, and the resulting centrifugal forces can cancel each other out, ensuring the stable operation of the screening box 11.
[0023] Based on the above embodiments, to improve the structural strength of the screening box 11 and achieve stable screening operation, a reinforcing support plate 111 is fixedly installed on both the front and rear sides of the bottom of the screening box 11. The outer side of the reinforcing support plate 111 and the outer side of the screening box 11 are fixedly connected by several reinforcing ribs 112. A motor mounting plate 121 is fixedly installed on the outer side of the joint between the reinforcing support plate 111 and the screening box 11. A vibration motor 12 is fixedly installed on each of the motor mounting plates 121. Furthermore, a reinforcing rib plate 15 is provided on both the left and right sides of the bottom of the screening box 11, and the front and rear sides of the reinforcing rib plate 15 are fixedly connected to the corresponding reinforcing support plate 111. A reinforcing crossbeam 16 is fixedly installed between the two motor mounting plates 121, and the reinforcing crossbeam 16 penetrates the hollow quadrangular frustum 14. The reinforcing rib plate 15 and the reinforcing crossbeam 16 further improve the structural strength of the screening box 11, thereby facilitating stable vibration of the screening box 11.
[0024] In practical applications, the screening box 11 is mounted on the screening support 3 by four damping springs 31. Specifically, the screening support 3 is positioned with the left side lower than the right side. The four damping springs 31 are divided into two groups, with two damping springs in each group symmetrically distributed front and back. A lower spring positioning post is provided on the screening support 3 (not shown in the attached drawing for clarity). Spring supports 18 corresponding to the lower spring positioning posts are provided on both the front and rear sides of the screening box 11. An upper spring positioning post is provided at the bottom of the spring support 18. A damping spring 31 is fitted on the upper and lower spring positioning posts that are opposite each other. The expansion and contraction deformation capacity of the damping springs 31 is used to reduce the vibration impact of the screening box 11 on the screening support. The material conveying mechanism 2 is located below the open discharge port 14.
[0025] Based on the above embodiments, the specific implementation of the material conveying mechanism 2 is as follows: The material conveying mechanism 2 includes a conveying support 21, a conveying belt 22, a conveying belt support plate 23, and a driving mechanism 24. The conveying support 21 is located inside the screening support 3. The conveying belt 22 and the conveying belt support plate 23 are both disposed on the conveying support 21, and the conveying belt support plate 23 is used to support the running section of the conveying belt 22. Specifically, a driven roller and a driving roller are rotatably disposed on the left and right sides of the conveying support 21, and the conveying belt 22 is sleeved on the driven roller and the driving roller. The support plate 23 is fixedly disposed between the driven roller and the driving roller, and the upper plane of the conveyor belt support plate 23 is on the same horizontal plane as the highest upper edge of the driven roller and the driving roller. The drive mechanism 24 is disposed on the conveyor bracket 21, and the drive mechanism 24 is used to realize the rotation drive of the conveyor belt 22. Specifically, the drive mechanism 24 includes a drive motor, a reduction gearbox, and a transmission chain. The drive motor drives the reduction gearbox to rotate, the reduction gearbox drives the transmission chain to rotate, the transmission chain drives the driving roller to rotate, and the rotation of the driving roller drives the conveyor belt 22 to rotate, thereby realizing the conveying of materials located on the conveyor belt 22.
[0026] After small-diameter particles fall onto the conveyor belt 22 from the open discharge port 14, to prevent particles from running out from the front and rear sides of the conveyor belt 22, the longitudinal cross-section of the conveyor belt support plate 23 is made into a ︺ shape. Specifically, the conveyor belt support plate 23 consists of a horizontal plate 231 and two right-angle support frames 232. The two right-angle support frames 232 are symmetrically arranged on the front and rear sides of the horizontal plate 231, with their hypotenuses facing each other. The running section of the conveyor belt 22 also has a ︺ shape in its longitudinal cross-section under the support of the conveyor belt support plate 23. The conveyor belt 22 achieves a state of high on both sides and low in the middle through the support of the right-angle support frames 23, which facilitates the collection of particles towards the middle of the conveyor belt 22.
[0027] In this utility model, "upper", "lower", "front", "back", "left", and "right" are all relative positions used to facilitate the description of positional relationships, and therefore cannot be understood as absolute positions as limitations on the scope of protection.
[0028] Except for the technical features described in the specification, all other technologies are known to those skilled in the art.
[0029] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. For those skilled in the art, several improvements and modifications can be made without departing from the concept of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.
Claims
1. A soft magnetic ferrite powder balling and screening device, comprising a linear vibrating screen, the linear vibrating screen comprising a screening box, a vibrating motor, a box cover arranged at the upper part of the screening box, a feeding port corresponding to the feeding end of the screening box arranged on the box cover, and a first screen and a second screen arranged in the screening box from top to bottom in sequence, characterized in that, The screening device further comprises a material conveying mechanism, the bottom of the screening box is in an open state, an open discharge port is arranged at the bottom of the screening box, and the particle materials falling from the bottom of the screening box fall into the material conveying mechanism through the flow guide of the open discharge port; the material conveying mechanism is used for realizing directional conveying of the materials falling thereinto; the screening box is distributed in a left-low and right-high state, and the two vibration motors are arranged on the front and back sides of the screening box in a front-back symmetrical state; the upper part of the open discharge port is a hollow quadrangular frustum, the lower part of the open discharge port is a rectangular frame, and the rectangular frame is fixedly arranged at the lower part of the hollow quadrangular frustum; a reinforcing support plate is fixedly arranged on the front and back sides of the bottom of the screening box, the outer side of the reinforcing support plate is fixedly connected with the outer side of the screening box through reinforcing ribs, and a motor mounting plate is fixedly arranged at the outer side of the abutting position of the reinforcing support plate and the screening box.
2. A soft magnetic ferrite powder balling and screening apparatus according to claim 1, characterized in that The left and right sides of the bottom of the screening box are both provided with a reinforcing rib plate, the front and back sides of the reinforcing rib plate are fixedly connected with the corresponding reinforcing support plates, a reinforcing cross beam is fixedly arranged between the two motor mounting plates, and the reinforcing cross beam penetrates through the hollow quadrangular frustum.
3. A soft magnetic ferrite powder balling and screening apparatus according to claim 2, characterized in that The screening box is arranged on the screening support through four damping springs, and the material conveying mechanism is arranged below the open discharge port.
4. A soft magnetic ferrite powder balling and screening apparatus according to claim 3, characterized in that The material conveying mechanism comprises a conveying support, a conveying belt, a conveying belt support plate and a driving mechanism, the conveying support is arranged in the screening support, the conveying belt and the conveying belt support plate are arranged on the conveying support, the conveying belt support plate is used for supporting the upper running section of the conveying belt, and the driving mechanism is arranged on the conveying support and is used for realizing rotational driving of the conveying belt.
5. A soft magnetic ferrite powder balling and screening apparatus according to claim 4, characterized in that The longitudinal section of the conveying belt support plate is in a shape of a Japanese character "Y", and the longitudinal section of the upper running section of the conveying belt is also in a shape of a Japanese character "Y" under the support of the conveying belt support plate.