Automatic screening device for neodymium-iron-boron magnetic powder

Abstract

This utility model discloses an automatic screening device for NdFeB magnetic powder in the field of NdFeB screening technology. It includes a screening box with multiple sets of corrugated screening plates fixedly connected inside. Multiple sets of sweeping shafts are rotatably connected to the inner wall of the screening box. Sweeping rods are fixedly connected to the side walls of the sweeping shafts, and sweeping brushes are elastically connected to the outer sides of the sweeping rods. The sweeping brushes are used to clean the screening plates. Discharge ports are provided on both sides of the screening box, located at both ends of the screening plates. A hopper is provided at the top of the screening box, and a fixed rubbing component and a movable rubbing component are provided at the bottom of the hopper. The movable rubbing component moves up and down on one side of the fixed rubbing component to break up the powder. This utility model can avoid powder lumps that are difficult to disperse and thus prevent effective screening, avoid leaving a large amount of powder behind, and ensure that the screening plates always have a high utilization rate, improving screening quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of neodymium iron boron sieving technology, specifically to an automatic sieving device for neodymium iron boron magnetic powder. Background Technology

[0002] Neodymium magnets are tetragonal crystals formed from neodymium, iron, and boron. When processing neodymium iron boron magnet materials, the neodymium iron boron magnet powder needs to be sieved. Only uniform and fine powder after sieving is used for processing to ensure the quality of the processed neodymium iron boron magnets.

[0003] However, most existing powder screening machines use several layers of horizontally laid screens, which are continuously shaken by a vibrating motor to screen and separate the powder. The separation is slow from bottom to top, which results in low screening efficiency. It is also difficult to shake off and discharge clumps of powder. As screening continues, larger particles or clumps of powder remain, occupying the screen space and causing clogging of the screening holes, leading to low screening efficiency. In addition, screen cleaning is relatively difficult, and the screens have long been occupied with low utilization.

[0004] Based on this, this utility model designs an automatic sieving device for neodymium iron boron magnetic powder to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an automatic screening device for neodymium iron boron magnetic powder, so as to solve the problems of low screening efficiency, easy clogging of screening holes, and low screen utilization rate of existing screening devices mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An automatic sieving device for neodymium iron boron magnetic powder includes a sieving box, with multiple sets of corrugated sieving plates fixedly connected inside the sieving box. Multiple sets of sweeping shafts are rotatably connected to the inner wall of the sieving box. Sweeping rods are fixedly connected to the side walls of the sweeping shafts, and sweeping brushes are elastically connected to the outer sides of the sweeping rods. The sweeping brushes are used to clean the sieving plates. Discharge ports are opened on both sides of the sieving box, located at both ends of the sieving plates. A hopper is provided at the top of the sieving box, and a fixed rubbing component and a movable rubbing component are provided at the bottom of the hopper. The movable rubbing component moves up and down on one side of the fixed rubbing component to rub the powder apart.

[0008] Preferably, the screening plate is a corrugated plate composed of multiple semi-circular arcs, with the middle of the screening plate being higher than the two ends, and the sweeping axis being located at the center of the semi-circular arcs at both ends of the screening plate.

[0009] Preferably, guide plates are fixedly connected to both ends of the screening plate. The guide plates are inclined plates with the inner side higher than the outer side, and one end of the guide plates is fixedly connected to the discharge port.

[0010] Preferably, a baffle plate is fixedly connected to the inside of the discharge port, and the baffle plate is located above the guide plate.

[0011] Preferably, both the movable and fixed material rubbing components include a back plate and a material rubbing plate. The material rubbing plate is elastically connected to one side of the back plate. Multiple rows of rubbing rods are fixedly connected to the inner side of the material rubbing plate. The rubbing rods of the movable and fixed material rubbing components are arranged crosswise. A lower hanging rod is fixedly connected to one end of the back plate of the movable material rubbing component. A sliding window is fixedly opened on the rear wall of the screening box. The lower hanging rod passes through the sliding window and is slidably connected to the screening box. A reciprocating spring is fixedly connected between the lower hanging rod and the screening box.

[0012] Preferably, the sweeping shafts in the same column are driven by a chain, and one of the sweeping shafts located at the top is fixedly connected to a swing arm at its end. The swing arm is used to push the lower hanging rod to drive the back plate of the moving material rubbing component to slide down.

[0013] Preferably, the upper end of the material rubbing plate is provided with an open ramp, and the distance between the open ramps of the material rubbing plate is greater than the opening width at the bottom of the hopper.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes a reciprocating moving material-rubbing component that rubs against a fixed material-rubbing component to break up lumps or relatively large, sticky powder clumps. This prevents the powder clumps from being difficult to disperse and thus hinders effective sieving. The cooperation between the reciprocating moving and fixed material-rubbing components also controls the amount of material fed, ensuring a more even and smaller drop, preventing large amounts of material from accumulating on the screening plate and hindering rapid and effective sieving, thereby improving screening quality and efficiency. A rotating sweeping shaft drives a sweeping brush to brush across the screening plate, preventing clogging and further assisting in crushing and sieving. At the same time, it avoids leaving large amounts of powder behind, ensuring that the screening plate always has a high utilization rate. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the front view structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the front-view half-section structure of this utility model;

[0020] Figure 4This is an enlarged structural diagram of part A of the present invention;

[0021] Figure 5 This is a side view half-section structural diagram of the present invention.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Screening box; 2. Screening plate; 3. Sweeping shaft; 4. Sweeping rod; 5. Sweeping brush; 6. Discharge port; 7. Feed hopper; 8. Fixed material rubbing component; 9. Moving material rubbing component; 10. Guide inclined plate; 11. Material blocking slide plate; 91. Back plate; 92. Material rubbing plate; 93. Rubbing rod; 94. Lower hanging rod; 95. Sliding window; 96. Reciprocating spring; 18. Swing rod; 19. Open ramp. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 This utility model provides a technical solution:

[0026] An automatic sieving device for neodymium iron boron magnetic powder includes a sieving box 1. Multiple sets of corrugated sieving plates 2 are fixedly connected inside the sieving box 1. Multiple sets of sweeping shafts 3 are rotatably connected to the inner wall of the sieving box 1. Sweeping rods 4 are fixedly connected to the side walls of the sweeping shafts 3. Sweeping brushes 5 are elastically connected to the outer side of the sweeping rods 4. The sweeping brushes 5 are used to clean the sieving plates 2. Discharge ports 6 are opened on both sides of the sieving box 1. The discharge ports 6 are located at both ends of the sieving plates 2. A feeding hopper 7 is provided at the top of the sieving box 1. A fixed rubbing component 8 and a movable rubbing component 9 are provided at the bottom of the feeding hopper 7. The movable rubbing component 9 moves up and down on one side of the fixed rubbing component 8 to rub the powder apart.

[0027] This invention involves feeding the powder to be screened into a hopper. The powder falls between a fixed rubbing component 8 and a movable rubbing component 9. The movable rubbing component 9, moving up and down, rubs the powder against the fixed rubbing component 8, breaking up lumps or large, sticky pieces of powder. This prevents the powder from being difficult to disperse and thus hinders effective screening. The cooperation between the movable and fixed rubbing components also controls the amount of material fed, ensuring a more even and smaller amount of material falls. This prevents a large amount of material from accumulating on the screening plate 2, which would hinder rapid and effective screening, thereby improving screening quality and efficiency. After the powder falls onto the screening plate 2, smaller powder particles fall automatically, while larger or slightly sticky powder particles flow to both ends of the screening plate 2. During the flow, some of the powder is also filtered out. Thus, most of the powder reaching the lowest point at both ends of the screening plate 2 consists of clumps or larger particles. Then, as the rotating sweeping shaft 3 drives the sweeping brush 5 to brush across the screening plate 2, the sweeping brush 5 can sweep off the powder stuck on the screening plate 2 and, to a certain extent, rub and sweep away the clumps. When the sweeping brush 5 reaches the very end of the screening plate 2, it will sweep away the remaining material along the tangent of the screening plate 2, thereby sweeping out the remaining material and discharging it through the discharge port 6. This not only prevents the screening plate 2 from clogging but also further assists in crushing and screening, while avoiding the retention of a large amount of powder, ensuring that the screening plate 2 always has a high utilization rate.

[0028] The sieve plate 2 is a wavy plate composed of multiple semi-circular arcs, with a higher center and lower ends. The sweeping shaft 3 is located at the center of the semi-circular arcs at both ends of the sieve plate 2. When the sweeping shaft 3 drives the sweeping rod 4 to rotate, it can fit closely with the sieve plate 2 to ensure cleaning coverage and cleaning effect. At the same time, the sweeping brush 5 is elastically connected to one side of the sweeping rod 4 through a telescopic rod, so that the sweeping brush 5 can always be in contact with the sieve plate 2. When there are large powder lumps, the sweeping brush 5 can retract to avoid jamming and failure to operate normally.

[0029] The screening plate 2 has guide inclined plates 10 fixedly connected to both ends. The guide inclined plates 10 are inclined plates with the inner side higher than the outer side, and one end of the guide inclined plate 10 is fixedly connected to the discharge port 6. This allows for better collection and discharge of the swept-out residual powder.

[0030] The discharge port 6 is fixedly connected to a baffle plate 11, which is located above the guide plate to prevent the material falling from above from sliding directly out of the discharge port 6.

[0031] Preferably, both the movable material rubbing component 9 and the fixed material rubbing component 8 include a back plate 91 and a material rubbing plate 92. The material rubbing plate 92 is elastically connected to one side of the back plate 91. Multiple rows of rubbing rods 93 are fixedly connected to the inner side of the material rubbing plate 92. The rubbing rods 93 of the movable material rubbing component 9 and the fixed material rubbing component 8 are arranged crosswise. A lower hanging rod 94 is fixedly connected to one end of the back plate 91 of the movable material rubbing component 9. A sliding window 95 is fixedly opened on the rear wall of the screening box 1. The lower hanging rod 94 passes through the sliding window 95 and is slidably connected to the screening box 1. A reciprocating spring 96 is fixedly connected between the lower hanging rod 94 and the screening box 1.

[0032] Material falling from hopper 7 enters between the moving rubbing member 9 and the fixed rubbing member 8. Larger or piled-up powder is blocked by the crossed rubbing rods 93 and cannot fall. However, with the reciprocating movement of the moving rubbing member 9, large pieces of powder are squeezed and broken up by the rubbing rods 93 and fall, thus avoiding the problem of clumped material that cannot be effectively filtered. Since the rubbing plate 92 is elastically connected to one side of the back plate 91, it will not get stuck or damaged if there are large, difficult-to-crush materials during use, while also ensuring that the kneading has a certain clamping force.

[0033] Among them, the sweeping shafts 3 located in the same column are driven by a chain. One of the sweeping shafts 3 located at the top is fixedly connected to a swing arm 18 at its end. The swing arm 18 is used to push the lower hanging rod 94 to drive the back plate 91 of the moving material rubbing component 9 to slide down.

[0034] As the sweeping shaft 3 rotates continuously, it drives the other sweeping shafts 3 in the same row to rotate together through chain drive. During rotation, it drives the swing arm 18 to rotate. When the swing arm 18 reaches the end of the lower hanging rod 94, it pulls down the lower hanging rod 94. The lower hanging rod 94 moves down, causing the back plate 91 and the rubbing plate 92 to move down. When the swing arm 18 rotates completely past the lower hanging rod 94, the lower hanging rod 94 automatically moves up to return to its original position under the action of the reciprocating spring 96. This achieves the effect of the rubbing plate 92 of the moving rubbing component 9 moving back and forth on the side of the rubbing plate 92 of the fixed rubbing component 8.

[0035] The upper end of the material rubbing plate 92 is provided with an open ramp 19, and the distance between the open ramps 19 of the material rubbing plate 92 is greater than the opening width of the bottom of the hopper 7. This ensures that the material in the hopper 7 can fall completely between the moving material rubbing component 9 and the fixed material rubbing component 8, preventing material leakage and ensuring that the falling material is rubbed open, while also limiting the amount of material discharged.

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," 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.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic sieving device for neodymium iron boron magnetic powder, characterized in that: The sieve box (1) is fixedly connected to a number of wavy sieve plates (2). The inner wall of the sieve box (1) is rotatably connected to a number of sweeping shafts (3). The side wall of the sweeping shaft (3) is fixedly connected to a sweeping rod (4). The outer side of the sweeping rod (4) is elastically connected to a sweeping brush (5). The sweeping brush (5) is used to clean the sieve plate (2). The sieve box (1) has discharge ports (6) on both sides. The discharge ports (6) are located at both ends of the sieve plate (2). The top of the sieve box (1) is provided with a feeding hopper (7). The bottom of the feeding hopper (7) is provided with a fixed rubbing component (8) and a movable rubbing component (9). The movable rubbing component (9) moves up and down on one side of the fixed rubbing component (8) to rub the powder.

2. The automatic sieving device for neodymium iron boron magnetic powder according to claim 1, characterized in that: The sieve plate (2) is a wave-shaped plate composed of multiple semi-circular arcs. The sieve plate (2) is high in the middle and low at both ends, and the sweeping shaft (3) is located at the center of the semi-circular arcs at both ends of the sieve plate (2).

3. The automatic sieving device for neodymium iron boron magnetic powder according to claim 1, characterized in that: Both ends of the screening plate (2) are fixedly connected to guide inclined plates (10). The guide inclined plates (10) are inclined plates with the inner side higher than the outer side. One end of the guide inclined plate (10) is fixedly connected to the discharge port (6).

4. The automatic sieving device for neodymium iron boron magnetic powder according to claim 1, characterized in that: A baffle plate (11) is fixedly connected to the inside of the discharge port (6), and the baffle plate (11) is located above the guide ramp (10).

5. An automatic sieving device for neodymium iron boron magnetic powder according to claim 1, characterized in that: Both the movable material rubbing component (9) and the fixed material rubbing component (8) include a back plate (91) and a material rubbing plate (92). The material rubbing plate (92) is elastically connected to one side of the back plate (91). Multiple rows of rubbing rods (93) are fixedly connected to the inner side of the material rubbing plate (92). The rubbing rods (93) of the movable material rubbing component (9) and the fixed material rubbing component (8) are arranged crosswise. A lower hanging rod (94) is fixedly connected to one end of the back plate (91) of the movable material rubbing component (9). A sliding window (95) is fixedly opened on the rear wall of the screening box (1). The lower hanging rod (94) passes through the sliding window (95) and is slidably connected to the screening box (1). A reciprocating spring (96) is fixedly connected between the lower hanging rod (94) and the screening box (1).

6. The automatic sieving device for neodymium iron boron magnetic powder according to claim 1, characterized in that: The sweeping shafts (3) located in the same column are driven by a chain. One of the sweeping shafts (3) located at the top is fixedly connected to a swing arm (18). The swing arm (18) is used to push the lower hanging rod (94) to drive the back plate (91) of the moving material rubbing part (9) to slide down.

7. An automatic sieving device for neodymium iron boron magnetic powder according to claim 5, characterized in that: The upper end of the material rubbing plate (92) is provided with an open ramp (19), and the distance between the open ramps (19) of the material rubbing plate (92) is greater than the opening width of the bottom of the hopper (7).

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