Multi-layer powder screening device

Abstract

The utility model discloses a multi-layer powder screening device, which belongs to the field of powder screening devices and comprises a machine base, a vibrating disc and a feeding mechanism, an electric push rod stretches out and draws back to drive a movable plate to move and enable a rack to move, a sector gear meshed with the rack rotates, an adjusting plate is driven to rotate through a rotating rod in the rotating process, and the vibrating disc is driven to rotate. The angle of the adjusting plates can be accurately adjusted by controlling the telescopic degree of the electric push rod, and the opening and closing degree between the adjusting plates is controlled, so that the amount and speed of materials entering the powder screening device from the storage hopper are accurately controlled, and the problem that the manual adding amount is difficult to control is solved; according to the powder screening device, the conditions of overlarge screen surface load and insufficient screening caused by excessive adding amount are prevented, the problem that the production efficiency is influenced by too small adding amount is solved, the stability and high efficiency of the screening process are ensured, automatic feeding operation is achieved, and materials can be automatically conveyed into the powder screening device.

Description

Technical Field

[0001] This utility model relates to the field of powder screening devices, and in particular to a multi-layer powder screening device. Background Technology

[0002] A vibrating screen is a screening device that uses the excitation force generated by a vertical vibrating motor to cause the screen surface to move in three dimensions: horizontal, vertical, and inclined. It can perform fine screening, impurity removal, and filtration of granular, powdered, and liquid materials down to 5 mesh, featuring high screening efficiency and high precision. The vibrating screen adopts a fully enclosed structure and is suitable for screening and filtering granular, powdered, and viscous materials, and is widely used in various industries such as grain processing, chemical, pharmaceutical, building materials, and metallurgy.

[0003] In existing technologies, wheat is susceptible to various impurities during harvesting, storage, and transportation, such as dust, sand, chaff, broken grains, and potentially moldy grains. Additionally, wheat grains themselves vary in size. A vibrating screen, with its multi-layered screen design, effectively separates impurities, foreign objects, and wheat grains of different qualities based on differences in particle size and density. This multi-layered screening progressively removes large and small impurities, selecting wheat grains that meet processing requirements. This ensures that the wheat entering the mill is pure and uniform, thereby improving the quality and taste of the flour, reducing wear on subsequent processing equipment, increasing production efficiency, and guaranteeing food safety.

[0004] However, existing multi-layer sieving devices using a vibrating sieve have the following problems when performing multi-layer sieving of wheat flour:

[0005] Manual material loading requires a lot of manpower, which increases production costs, and long hours of repetitive labor can easily lead to worker fatigue, thus affecting work efficiency.

[0006] Manually adding the material is difficult to control precisely. In practice, adding too much will overload the screen surface, preventing the material from being fully dispersed and screened, reducing the screening effect and quality, and causing incomplete screening to occur frequently, affecting product quality and subsequent processing. Conversely, adding too little will result in low equipment production efficiency, making it unable to meet the needs of large-scale production. Utility Model Content

[0007] The main purpose of this invention is to provide a multi-layer powder screening device that can effectively solve the problems in the background art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A multi-layer powder screening device includes a base and a vibrating plate. Several damping springs are fixedly connected between the base and the vibrating plate. A vibrating motor is fixedly connected to the bottom surface of the vibrating plate. Several screen frames are fixedly connected to the top surface of the vibrating plate in a stacked manner. A discharge port is fixedly connected to the side wall of each screen frame. Screen meshes are fixedly connected inside each screen frame, with the mesh density gradually increasing from top to bottom. A dust cover is fixedly connected to the top surface of the uppermost screen frame, and a feed inlet is fixedly connected to the top surface of the dust cover. The feed inlet... The device is equipped with a feeding mechanism, which includes a storage hopper, a housing, an electric push rod, a movable plate, a rack, an adjusting plate, and a sector gear. The housing is fixedly connected between the discharge port and the storage hopper. The electric push rod is fixedly connected to the top surface of the L-shaped plate at the front end of the housing. The movable plate is fixedly connected to the output end of the electric push rod. The rack is fixedly connected to both sides of the electric push rod. The two adjusting plates are movably connected to the housing through rotating rods at both ends. The sector gear is fixedly connected to the rotating rod on one side and meshes with the rack.

[0010] Furthermore, the storage hopper is located above the dust cover, and a set of symmetrical support plates are fixedly installed between the storage hopper and the dust cover.

[0011] Furthermore, the outer shell of the mechanism is fixedly installed between the storage hopper and the feed inlet and is interconnected with each other, and a set of symmetrical rotating holes are respectively opened on the front and rear walls of the outer shell of the mechanism.

[0012] Furthermore, the L-shaped plate is fixedly installed on the front wall of the mechanism housing and located between the rotating holes, and a T-shaped guide bar is fixedly installed on the front wall of the vertical part of the L-shaped plate.

[0013] Furthermore, the electric actuator is fixedly installed on the top surface of the transverse part of the L-shaped plate, and a movable plate is fixedly installed on the output end of the electric actuator. A T-shaped guide groove is provided on the rear wall of the movable plate, and the movable plate is movably installed together with the T-shaped guide bar through the T-shaped guide groove. Racks are fixedly installed on the left and right side walls of the movable plate respectively.

[0014] Furthermore, the adjustment plate is provided with a set of left and right symmetrical ones, and a rotating rod is fixedly installed on the front and rear ends of the adjustment plate respectively. The rotating rod is movably installed in the rotating hole, and the sector gear is fixedly installed on the end wall of the front rotating rod and meshes with the rack.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In this invention, the feeding mechanism utilizes an electric push rod to extend and retract, moving a movable plate and causing a rack to rotate. The sector gear meshing with the rack rotates, and during this rotation, it drives an adjusting plate to rotate via a rotating rod. By controlling the extension and retraction of the electric push rod, the angle of the adjusting plate can be precisely adjusted, and the opening and closing of the adjusting plates can be controlled. This allows for precise control of the amount and speed of material entering the screening device from the storage hopper, avoiding the problem of difficulty in controlling the amount added manually. It prevents both excessive addition leading to overload on the screen surface and insufficient screening, and insufficient addition affecting production efficiency. This ensures the stability and efficiency of the screening process and achieves automatic feeding, automatically conveying materials to the screening device without relying on manual feeding. This avoids long hours of repetitive labor for workers, effectively reducing labor intensity, manpower input, production costs, and improving work efficiency. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram showing the overall structure of this utility model broken down.

[0019] Figure 3 This is a schematic diagram of the overall structure of the storage hopper and the outer shell of the mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the L-shaped plate of this utility model;

[0021] Figure 5 This is a structural breakdown diagram of the feeding mechanism of this utility model.

[0022] In the diagram: 1. Base; 2. Vibratory feeder; 3. Shock-absorbing spring; 4. Vibratory motor; 5. Screen frame; 6. Discharge port; 7. Screen mesh; 8. Dust cover; 9. Feed inlet; 10. Feeding mechanism; 11. Storage hopper; 12. Support plate; 13. Mechanism housing; 14. Rotating hole; 15. L-shaped plate; 16. T-shaped guide bar; 17. Electric actuator; 18. Movable plate; 19. T-shaped guide groove; 20. Rack; 21. Adjusting plate; 22. Rotating rod; 23. Sector gear. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figure 1 - Figure 5As shown, a multi-layer powder screening device includes a base 1 and a vibrating plate 2. Several damping springs 3 are fixedly connected between the base 1 and the vibrating plate 2. A vibrating motor 4 is fixedly connected to the bottom surface of the vibrating plate 2. Several screen frames 5 are fixedly connected to the top surface of the vibrating plate 2 in a stacked manner. A discharge port 6 is fixedly connected to the side wall of the screen frame 5. A screen mesh 7 is fixedly connected inside the screen frame 5. The density of the screen mesh 7 gradually increases from top to bottom. A dust cover 8 is fixedly connected to the top surface of the uppermost screen frame 5. A feed inlet 9 is fixedly connected to the top surface of the dust cover 8.

[0025] The screening principle of this multi-layer sieving device during wheat flour processing is as follows:

[0026] Turn on the vibrating motor 4 installed on the bottom of the vibrating plate 2. After the power is turned on, the vibrating motor 4 generates an excitation force, causing the vibrating plate 2 to vibrate. Since there are several damping springs 3 fixedly connected between the machine base 1 and the vibrating plate 2, the damping springs 3 can effectively reduce the vibration transmitted to the machine base 1, while ensuring that the vibrating plate 2 can vibrate normally. When the wheat flour material enters the uppermost screen frame 5 from the feed port 9 on the top surface of the dust cover 8, under the action of the vibration of the vibrating plate 2, the material moves on the screen 7 in the screen frame 5. The density of the screen 7 gradually increases from top to bottom. Larger particles cannot pass through the screen 7 and will remain in the screen frame 5. Smaller particles pass through the screen 7 and fall into the lower screen frame 5 for further screening. After being screened by the screen 7 in multiple screen frames 5, materials of different particle sizes remain in the corresponding screen frames 5 and are finally discharged through the discharge port 6 fixedly connected to the side wall of the screen frame 5, thus realizing the multi-layer screening and grading of wheat flour material.

[0027] A feeding mechanism 10 is provided above the feed inlet 9. The feeding mechanism 10 includes a storage hopper 11, a mechanism housing 13, an electric push rod 17, a movable plate 18, a rack 20, an adjusting plate 21, and a sector gear 23. The mechanism housing 13 is fixedly connected between the discharge port 6 and the storage hopper 11. The electric push rod 17 is fixedly connected to the top surface of the L-shaped plate 15 at the front end of the mechanism housing 13. The movable plate 18 is fixedly connected to the output end of the electric push rod 17. The rack 20 is fixedly connected to both sides of the electric push rod 17. The two adjusting plates 21 are movably connected to the mechanism housing 13 through the rotating rods 22 at both ends. The sector gear 23 is fixedly connected to the rotating rod 22 on one side and meshes with the rack 20.

[0028] like Figure 3 As shown, the storage hopper 11 is located above the dust cover 8. The storage hopper 11 is used to store and receive the material to be screened. It is placed above the dust cover 8, and the material can fall naturally into the screening device by gravity. A set of symmetrical support plates 12 are fixedly installed between the storage hopper 11 and the dust cover 8. The support plates 12 play the role of supporting and fixing the storage hopper 11 to ensure the stability of the position of the storage hopper 11.

[0029] like Figure 3 As shown, the outer shell 13 of the mechanism is fixedly installed between the storage hopper 11 and the feed inlet 9 and is interconnected with each other. The outer shell 13 of the mechanism serves as the main frame of the feeding mechanism. It is fixedly installed between the storage hopper 11 and the feed inlet 9 to form a connected channel, so that the material can smoothly enter the feed inlet 9 from the storage hopper 11 through the outer shell 13 of the mechanism. A set of symmetrical rotating holes 14 are respectively opened on the front and rear walls of the outer shell 13. The rotating holes 14 are used to cooperate with the rotating rod 22 to realize the rotation operation.

[0030] like Figure 4 As shown, the L-shaped plate 15 is fixedly installed on the front wall of the housing 13 of the mechanism and located between the rotating holes 14. The L-shaped plate 15 can serve as a mounting support for the electric push rod 17. A T-shaped guide bar 16 is fixedly installed on the front wall of the vertical part of the L-shaped plate 15, which cooperates with the T-shaped guide groove 19 on the movable plate 18. By utilizing the guiding principle of the T-shaped structure, the moving direction of the movable plate 18 is restricted, so that it can only move in a straight line along the direction of the T-shaped guide bar 16.

[0031] like Figure 5 As shown, the electric actuator 17 is fixedly installed on the top surface of the transverse part of the L-shaped plate 15, and a movable plate 18 is fixedly installed on the output end of the electric actuator 17. A T-shaped guide groove 19 is provided on the rear wall of the movable plate 18, and the movable plate 18 is movably installed together with the T-shaped guide bar 16 through the T-shaped guide groove 19. Racks 20 are fixedly installed on the left and right side walls of the movable plate 18 respectively. When the electric actuator 17 is turned on, the output end of the actuator is driven to push the movable plate 18 downward, so that the movable plate 18 moves along the T-shaped guide bar 16 through the T-shaped guide groove 19, and drives the racks 20 on both sides to move synchronously, thereby providing driving force for the rotation of the sector gear 23.

[0032] like Figure 5 As shown, the adjusting plate 21 is provided with a set of left and right symmetrical ones, and rotating rods 22 are fixedly installed on the front and rear ends of the adjusting plate 21 respectively. The rotating rods 22 are movably installed in the rotating hole 14, and the sector gear 23 is fixedly installed on the end wall of the front rotating rod 22 and meshes with the rack 20. When the rack 20 moves linearly under the drive of the movable plate 18, it will push the sector gear 23 to rotate, thereby driving the rotating rod 22 and the adjusting plate 21 to rotate. The meshing transmission between the sector gear 23 and the rack 20 realizes the conversion of the linear motion of the movable plate 18 into the rotational motion of the adjusting plate 21. By controlling the extension and retraction of the electric push rod 17, the rotation angle of the adjusting plate 21 can be precisely adjusted, thereby accurately controlling the opening size of the discharge port, realizing precise control of material flow and falling speed, and realizing automatic feeding operation.

[0033] The specific working principle of the feeding mechanism 10 in conjunction with the multi-layer powder screening device is as follows:

[0034] The wheat flour processing powder to be screened is placed into the storage hopper 11 for storage. When screening is required, the electric actuator 17 installed on the top surface of the horizontal part of the L-shaped plate 15 is activated. The electric actuator 17 drives the output end to push the movable plate 18 downward. The movable plate 18 slides along the T-shaped guide bar 16 on the front wall of the vertical part of the L-shaped plate 15 through the T-shaped guide groove 19 opened on the rear wall. The racks 20 installed on both sides of the movable plate 18 move with the movement of the movable plate 18. When the racks 20 move downward... Because the rack 20 and the sector gear 23 mesh together, the rack 20 will drive the sector gear 23 to rotate under the meshing action. The symmetrical sector gears 23 will rotate relative to each other, and during this rotation, they will drive the rotating rod 22 to rotate within the rotating hole 14 on the mechanism housing 13. The rotating rod 22 will then drive the adjusting plate 21 to rotate within the mechanism housing 13. The symmetrical adjusting plates 21 will rotate relative to each other, and during this continuous rotation, the material feeding gap will gradually increase. Simultaneously, the material stored in… The material in the storage hopper 11 falls into the outer shell 13 of the mechanism under gravity, passes through the feeding gap formed between the adjusting plates 21 inside the outer shell 13, and enters the multi-layer screening device through the feed inlet 9 for multi-layer screening. By controlling the extension and retraction of the electric push rod 17, the angle of the adjusting plates 21 can be precisely adjusted, and the opening and closing of the adjusting plates 21 can be controlled to precisely control the amount and speed of material entering the screening device from the storage hopper 11. This avoids the problem of difficulty in controlling the amount added manually. It prevents both excessive addition leading to excessive screen load and insufficient screening, and insufficient addition affecting production efficiency. This ensures the stability and efficiency of the screening process. At the same time, it eliminates the need for repeated manual feeding of materials into the device. The material is automatically transported into the device for processing by the feeding mechanism 10, realizing automatic feeding operation. It no longer relies on manual feeding, avoids long hours of repetitive labor by workers, effectively reduces labor intensity, reduces manpower input, lowers production costs, and improves work efficiency.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-layer powder screening device, comprising a base (1) and a vibrating plate (2), wherein a plurality of damping springs (3) are fixedly connected between the base (1) and the vibrating plate (2), and a vibrating motor (4) is fixedly connected to the bottom surface of the vibrating plate (2), wherein a plurality of screen frames (5) are fixedly connected to the top surface of the vibrating plate (2) in a stacked manner, and a discharge port (6) is fixedly connected to the side wall of the screen frame (5), wherein a screen mesh (7) is fixedly connected inside the screen frame (5), and the density of the screen mesh (7) gradually increases from top to bottom, and a dust cover (8) is fixedly connected to the top surface of the uppermost screen frame (5), and a feed inlet (9) is fixedly connected to the top surface of the dust cover (8), characterized in that: The upper side of the feeding port (9) is provided with a feeding mechanism (10), and the feeding mechanism (10) comprises a storage hopper (11), a mechanism shell (13), an electric push rod (17), a movable plate (18), a rack (20), an adjusting plate (21) and a sector gear (23), the mechanism shell (13) is fixedly connected between the discharge port (6) and the storage hopper (11), and the electric push rod (17) is fixedly connected to the top surface of the front end L-shaped plate (15) of the mechanism shell (13), the movable plate (18) is fixedly connected to the output end of the electric push rod (17), and the rack (20) is fixedly connected to the two sides of the electric push rod (17), the two adjusting plates (21) are movably connected in the mechanism shell (13) through the rotating rods (22) at the two ends, and the sector gear (23) is fixedly connected with the rotating rod (22) on one side and meshes with the rack (20).

2. A multi-deck sifter according to claim 1, wherein: The storage hopper (11) is located above the dustproof cover (8), and a set of symmetrical supporting plates (12) are fixedly installed between the storage hopper (11) and the dustproof cover (8).

3. A multi-deck sifter according to claim 2, wherein: The mechanism shell (13) is fixedly installed between the storage hopper (11) and the feeding port (9) and is in communication with each other, and a set of symmetrical rotating holes (14) are formed in the front and rear walls of the mechanism shell (13).

4. A multi-deck sifter according to claim 3, wherein: The L-shaped plate (15) is fixedly installed on the front wall of the mechanism shell (13) and is located between the rotating holes (14), and a T-shaped guide strip (16) is fixedly installed on the front wall of the vertical part of the L-shaped plate (15).

5. A multi-deck sifter according to claim 4, wherein: The electric push rod (17) is fixedly installed on the top surface of the horizontal part of the L-shaped plate (15), and the output end of the electric push rod (17) is fixedly installed with the movable plate (18), a T-shaped guide groove (19) is formed in the rear wall of the movable plate (18), and the movable plate (18) is movably installed with the T-shaped guide strip (16) through the T-shaped guide groove (19), and the left and right side walls of the movable plate (18) are respectively fixedly installed with the rack (20).

6. A multi-deck sifter according to claim 5, wherein: A set of left-right symmetrical adjusting plates (21) are arranged, and rotating rods (22) are fixedly installed on the front and rear ends of the adjusting plates (21), the rotating rods (22) are movably installed in the rotating holes (14), and the sector gear (23) is fixedly installed on the end wall of the front rotating rod (22) and meshes with the rack (20).

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