Multi-layer screen mesh type vibration cleaning sieve

Abstract

The invention discloses a multi-layer screen type vibration cleaning screen which comprises a screening box, multiple layers of screens are installed in the screening box from top to bottom, a feeding hopper is installed at one end of the top of the screening box, and the vibration cleaning screen is characterized in that the vibration cleaning screen further comprises a feeding device which comprises a feeding pipe installed at the bottom of the feeding hopper; a feeding port communicated with the interior of the feeding hopper is formed in the middle of the top of the feeding pipe, a feeding rod is coaxially arranged in the feeding pipe and connected with a driving device used for driving the feeding rod to rotate, grain in the feeding hopper can enter the feeding pipe through the feeding port, and the driving device can drive the feeding rod to rotate. The feeding rod can drive the two sets of auger blades with the opposite spiral directions to rotate so that grains in the middle of the feeding pipe can be conveyed to the two ends of the feeding pipe, meanwhile, the grains can be discharged through the multiple discharging openings in the conveying process so that the grains in the feeding hopper can be dispersed to all positions of the screen, the grains can be screened sufficiently, and the screening effect is good.

Description

Technical Field

[0001] This invention relates to the field of vibrating cleaning screen technology, and in particular to a multi-layer screen type vibrating cleaning screen. Background Technology

[0002] A grain vibrating cleaning screen is a processing device that uses vibration to screen grains. It uses a vibrating motor to drive the screen to vibrate back and forth to assist in conveying and screening the grains. It is used to remove large, medium, small and light impurities and remove impurity particles mixed in the grains. By being equipped with screens of different sizes, it can classify materials according to particle size. When screening grains, existing vibrating cleaning screens pour the grains into the screening box through the feed hopper at once, resulting in a large amount of grains falling onto the screen mesh and accumulating in large quantities from one place to the surrounding areas. The grains can only be dispersed by vibration, and often the grains are discharged from the vibrating screen before they are completely dispersed, resulting in insufficient screening and poor screening effect.

[0003] Chinese invention patent CN206854053U discloses a vibrating screen with a partition plate, including a feed hopper, a screen box, and a base frame. The upper section of the feed hopper is conical, and the lower section is rectangular. The lower outlet of the feed hopper is fixedly connected to the screen box. A partition plate is set along the middle position of the lower outlet of the feed hopper. The two ends of the partition plate are fixedly connected to the inner wall of the lower end of the feed hopper, forming a feeding channel in the middle. The screen is fixed on the cross-section of the screen box. Vibration motors are fixedly installed on both sides of the screen box. The lower end of the screen box is fixedly connected to the base frame near both ends by springs. By setting a partition plate along the middle position at the lower outlet of the feed hopper, when the material is poured into the feed hopper, the vibration of the partition plate divides the material, preventing blockage at the discharge port and avoiding insufficient screening caused by material accumulation. However, although the material can be dispersed to a certain extent by the vibration of the partition plate, it cannot be dispersed to all positions of the screen, thus resulting in insufficient screening. Therefore, the screening effect needs to be improved. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a multi-layer screen type vibrating cleaning screen. This invention solves the technical problem in the prior art where, when screening grain, the grain is poured into the screening box through the feed hopper at once, resulting in a large amount of grain falling onto the screen and accumulating in large quantities from one point to the surrounding areas. It can only be dispersed by vibration, and the grain is often discharged from the vibrating screen before it is completely dispersed, resulting in insufficient screening and poor screening effect.

[0005] To achieve the above-mentioned technical objectives, the present invention provides a multi-layer screen type vibrating cleaning screen, including a screening box, in which multiple layers of screens are installed from top to bottom. A feed hopper is installed at one end of the top of the screening box. The vibrating cleaning screen also includes a feeding device, which includes a feeding pipe installed at the bottom of the feeding hopper. The top of the feeding pipe has a feed port in the middle that communicates with the inside of the feeding hopper. A feeding rod is coaxially provided inside the feeding pipe. The feeding rod is connected to a drive device for driving its rotation. The outer walls at both ends of the feeding rod are respectively provided with auger blades with opposite spiral directions. Multiple discharge ports are provided at equal intervals at the bottom of the feeding rod along its central axis.

[0006] Furthermore, two arc-shaped baffles are arranged opposite each other at the bottom of the feeding tube, and the two arc-shaped baffles are respectively connected to a drive mechanism for driving the two arc-shaped baffles to rotate around the central axis of the feeding tube in different directions.

[0007] Furthermore, the drive mechanism includes a rotating connection assembly, which comprises two sets. One set of rotating connection assemblies is used to rotatably connect one end of the feeding pipe to one end of the two arc-shaped baffles, and the other set of rotating connection assemblies is used to rotatably connect the other end of the feeding pipe to the other end of the two arc-shaped baffles.

[0008] Furthermore, the rotating connection assembly includes a fixed shaft mounted on the feed pipe, and two rotating sleeves are rotatably mounted on the fixed shaft via bearings. The two rotating sleeves are respectively connected to the arc-shaped baffle via connecting rods.

[0009] Furthermore, the drive mechanism also includes a drive assembly connected to the rotary connection assembly. The power provided by the drive assembly is transmitted to the two arc-shaped baffles through the rotary connection assembly to drive the two arc-shaped baffles to rotate in different directions around the central axis of the feed tube.

[0010] Furthermore, the drive assembly includes two driven bevel teeth mounted on two rotating sleeves of the same rotating connection assembly. The two driven bevel teeth respectively mesh with the driving bevel teeth, and the driving bevel teeth are connected to a drive member for driving their rotation.

[0011] Furthermore, the discharge port gradually increases in size from the middle of the feeding pipe to both ends of the feeding pipe.

[0012] Furthermore, the bottom of the feed hopper is funnel-shaped.

[0013] Furthermore, the screen includes an upper screen, a middle screen, and a lower screen arranged from top to bottom. One side wall of the screening box is provided with a first discharge port for discharging large particles of impurities from the upper and middle screens. One end of the screening box is provided with a second discharge port for discharging material from the lower screen. The bottom of one end of the screening box is provided with a third discharge port for discharging small particles of impurities from the bottom of the screening box.

[0014] The beneficial effects of this invention include: 1. Grain inside the feed hopper can enter the feed pipe through the feed inlet. The feed rod can be driven to rotate by the drive device. The feed rod can drive two sets of auger blades with opposite spiral directions to rotate, so as to transport the grain in the middle of the feed pipe to both ends of the feed pipe. At the same time, the grain can be discharged through multiple discharge ports during the conveying process, so as to distribute the grain inside the feed hopper to various positions of the screen, so that the grain is fully screened and the screening effect is good. 2. The discharge port gradually increases in size from the middle of the feeding pipe to both ends. By making the discharge port near the middle of the feeding pipe smaller, the discharge volume in the middle of the feeding pipe can be limited. By making the discharge ports at both ends of the feeding pipe larger, the discharge volume at both ends of the feeding pipe can be increased. Ultimately, the discharge volume of all discharge ports is made consistent, so that the grain inside the feed hopper is more evenly distributed to all positions of the screen, making the grain screening more thorough and further improving the screening effect. 3. When it is necessary to adjust the grain screening speed, the speed of the feeding rod is controlled by the drive device. The feeding rod can control the speed of the auger blades, thereby adjusting the conveying speed of the grain inside the feeding pipe. At the same time, the drive mechanism can drive two arc plates to rotate around the central axis of the feeding pipe in different directions, adjusting the area blocked by the two arc plates at the discharge port to adjust the discharge volume. Thus, the grain screening speed can be adjusted according to actual needs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a multi-layer screen type vibrating cleaning screen according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a multi-layer screen vibrating cleaning screen according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the feeding device structure according to an embodiment of the present invention; Figure 4 This is another state diagram of the feeding device according to an embodiment of the present invention; Figure 5 yes Figure 3 Enlarged view of point A; Figure 6 yes Figure 4 Enlarged view of point B.

[0016] In the diagram: 1. Screening box; 11. First discharge port; 12. Second discharge port; 13. Third discharge port; 2. Screen; 21. Upper screen; 22. Middle screen; 23. Lower screen; 3. Feed hopper; 4. Feeding device; 41. Feeding pipe; 411. Feed inlet; 412. Discharge port; 42. Feeding rod; 43. Drive device; 44. Screwdriver blade; 45. Arc-shaped baffle; 46. Drive mechanism; 461. Connecting assembly; 4611. Fixed shaft; 4612. Bearing; 4613. Rotating sleeve; 4614. Connecting rod; 462. Drive assembly; 4621. Driven bevel gear; 4622. Active bevel gear; 4623. Drive component. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] This invention provides a multi-layer screen type vibrating cleaning screen, such as... Figure 1-4 As shown, the vibrating cleaning screen includes a screening box 1, inside which multiple layers of screens 2 are installed from top to bottom. A feed hopper 3 is installed at one end of the top of the screening box 1. The vibrating cleaning screen also includes a feeding device 4, which includes a feeding pipe 41 installed at the bottom of the feeding hopper 3. The top center of the feeding pipe 41 has a feed inlet 411 communicating with the inside of the feeding hopper 3. A feeding rod 42 is coaxially installed inside the feeding pipe 41. The feeding rod 42 is connected to a drive device 43 for driving its rotation. The drive device 43 is one of an electric motor, a hydraulic motor, or a pneumatic motor. The outer walls at both ends of the feeding rod 42 are respectively provided with spirals in opposite directions. The auger blades 44 and the feeding rod 42 are provided with multiple discharge ports 412 at equal intervals along their central axis. Grain inside the feed hopper 3 can enter the feed pipe 11 through the feed port 411. The feeding rod 42 can be driven to rotate by the driving device 43. The feeding rod 42 can drive two sets of auger blades 44 with opposite spiral directions to rotate, so as to transport the grain in the middle of the feed pipe 11 to both ends of the feed pipe 11. At the same time, the grain can be discharged through multiple discharge ports 412 during the conveying process, so as to disperse the grain inside the feed hopper 3 to various positions of the screen 2, so that the grain is fully screened and the screening effect is good.

[0019] It should be noted that the screen 2 includes an upper screen 21, a middle screen 22, and a lower screen 23 arranged from top to bottom. One end of the screening box 1 has a first discharge port 11 for discharging large particles from the upper and middle screens 21 and 22. One end of the screening box 1 has a second discharge port 12 for discharging material from the lower screen 23. One end of the screening box 1 has a third discharge port 13 for discharging small particles from the bottom of the screening box 1. The screen openings on the upper screen 21 are larger than those on the middle screen 22, and the screen openings on the middle screen 22 are larger than those on the lower screen 23. The grain... During the screening process, larger impurities in the grain can be screened out through the upper screen 21 and the middle screen 22. After screening, the larger impurities in the grain will remain on the upper screen and the middle screen 22, and then be discharged from the inside of the screening box 1 through the first discharge port 11. The screened grain will fall onto the lower screen 23, through which smaller impurities in the grain can be screened out. The screened grain will remain on the lower screen 23, and then be discharged from the inside of the screening box 1 through the second discharge port 12. The smaller impurities in the screened grain will fall to the bottom of the screening box 1, and then be discharged from the inside of the screening box 1 through the third discharge port 13.

[0020] It should be noted that, because the grain is spirally propelled forward by the auger blades 44 within the feeding pipe 41, the grain accumulation at the inlet 411 of the feeding pipe 41 is the densest, resulting in the highest pressure. However, towards both ends of the feeding pipe 41, some grain has already been discharged from the outlet 412, causing a decrease in pressure. This leads to a situation where more grain is discharged from the outlet 412 near the middle of the feeding pipe 41, while less is discharged from the outlets 412 at both ends, making uniform distribution impossible. Therefore, in this embodiment, the outlets 412 gradually increase in size along the direction from the middle of the feeding pipe 41 to both ends. Specifically, the outlets 412 are designed such that all outlets 412 gradually increase in size along the direction from the middle of the feeding pipe 41 to both ends. The length of the feeding pipe 41 is equal in the circumferential direction. At the same time, the width of the discharge port 412 gradually increases along the central axis of the feeding pipe 41 from the middle to both ends of the feeding pipe 41. By making the discharge port 412 near the middle of the feeding pipe 1 smaller, the discharge amount in the middle of the feeding pipe can be limited. By making the discharge ports 412 at both ends of the feeding pipe 1 larger, the discharge amount at both ends of the feeding pipe 1 can be increased. Finally, the discharge amount of all discharge ports 412 is made consistent, so that the grain inside the feed hopper is more evenly distributed to various positions of the screen 2, so that the grain screening is more thorough and the screening effect is further improved.

[0021] It should be noted that the bottom of the feed hopper 3 is funnel-shaped, which allows the grain inside the feed hopper 3 to enter the feed pipe 41 more smoothly through the feed inlet 411.

[0022] In this embodiment, two arc-shaped baffles 45 are arranged opposite each other at the bottom of the feeding pipe 41. The two arc-shaped baffles 45 are respectively connected to a drive mechanism 46 for driving the two arc-shaped baffles 45 to rotate in different directions around the central axis of the feeding pipe 41. The drive mechanism 46 can drive the two arc-shaped baffles 45 to rotate in different directions around the central axis of the feeding pipe 41. When it is necessary to adjust the grain screening speed, the drive device 43 controls the rotation speed of the feeding rod 42. The feeding rod 42 can control the rotation speed of the auger blades 44, thereby adjusting the conveying speed of the grain inside the feeding pipe 41. At the same time, the drive mechanism 46 can drive the two arc-shaped baffles 45 to rotate in different directions around the central axis of the feeding pipe 41, adjusting the size of the area blocked by the two arc-shaped baffles 45 at the discharge port 412, thereby adjusting the discharge amount at the discharge port 412. Thus, the grain screening speed can be adjusted according to actual needs.

[0023] In this embodiment, as Figure 5-6 As shown, the drive mechanism 46 includes a rotating connection assembly 461, which comprises two sets. One set of the rotating connection assembly 461 is used to rotatably connect one end of the feeding pipe 41 to one end of the two arc-shaped baffles 45, and the other set of the rotating connection assembly 461 is used to rotatably connect the other end of the feeding pipe 41 to the other end of the two arc-shaped baffles 45. The rotating connection assembly 461 also includes a fixed shaft 4611 mounted on the feeding pipe 41. The central axis of the fixed shaft 4611 is aligned with the central axis of the feeding pipe 41. Two rotating sleeves 4613 are rotatably mounted on the fixed shaft 4611 via bearings 4612. The two rotating sleeves 4613 are respectively connected to the arc-shaped baffles 45 via connecting rods 4614. The drive mechanism 46 also includes a drive assembly 462 connected to the rotating connection assembly 461. The power provided by the drive assembly 462 is transmitted to the two arc-shaped baffles 45 through the rotating connection assembly 461. On the arc-shaped baffle 45, two arc-shaped plates 45 are driven to rotate around the central axis of the feeding pipe 41 in different directions; at the same time, the driving assembly 462 includes two driven bevel teeth 4621 mounted on two rotating sleeves 4613 of the same rotating connection assembly 461. The two driven bevel teeth 4621 respectively mesh with the active bevel teeth 4622. The active bevel teeth 4622 are connected to the driving member 4623 for driving their rotation. The driving member 4623 is one of an electric motor, a hydraulic motor or a pneumatic motor. The driving member 4623 can drive the active bevel wheel 4622 to rotate. The active bevel teeth 4622 can drive the two driven bevel teeth 4621 to rotate in different directions. The two driven bevel teeth 4621 can drive the two rotating sleeves 4613 to rotate in different directions. The two rotating sleeves 4613 can respectively drive the two arc-shaped plates 45 to rotate around the central axis of the feeding pipe 41 in different directions through the connecting rod 4614.

[0024] It should be noted that the fixed shaft 4611 has a through hole at its center, and one end of the feeding rod 42 passes through the through hole and is connected to the drive device 43.

[0025] Specific principle: When screening grain, the grain to be screened is poured into the feed hopper 3. The grain inside the feed hopper 3 enters the feeding pipe 41 through the feed inlet 411. The drive device 43 drives the feeding rod 42 to rotate, which in turn drives two sets of auger blades 44 with opposite spiral directions to rotate, thus conveying the grain in the middle of the feeding pipe 11 to both ends of the feeding pipe 11. At the same time, the grain is discharged through multiple discharge ports 412 during the conveying process, dispersing the grain inside the feed hopper 3 to various positions of the screen 2. When it is necessary to adjust the screening speed of the grain, the drive device 43 controls the rotation speed of the feeding rod 42, which in turn controls the auger blades. The speed of the plate 44 is adjusted to regulate the conveying speed of the grain inside the feeding pipe 41. At the same time, the drive component 4623 can drive the active umbrella wheel 4622 to rotate. The active umbrella tooth 4622 can drive the two driven umbrella teeth 4621 to rotate in different directions. The two driven umbrella teeth 4621 can drive the two rotating sleeves 4613 to rotate in different directions. The two rotating sleeves 4613 can drive the two arc plates 45 to rotate around the central axis of the feeding pipe 41 in different directions through the connecting rod 4614. The size of the area blocked by the two arc plates 45 at the discharge port 412 is adjusted to adjust the discharge amount of the discharge port 412. Thus, the grain screening speed can be adjusted according to actual needs.

[0026] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A multi-layer screen type vibrating cleaning screen, comprising a screening box (1), wherein multiple layers of screens (2) are installed inside the screening box (1) from top to bottom, and a feed hopper (3) is installed at one end of the top of the screening box (1), characterized in that, The vibrating cleaning screen also includes a feeding device (4), which includes a feeding pipe (41) installed at the bottom of the feeding hopper (3). The top of the feeding pipe (41) is provided with a feed inlet (411) that communicates with the inside of the feeding hopper (3). The feeding pipe (41) is coaxially provided with a feeding rod (42) inside. The feeding rod (42) is connected to a driving device (43) for driving its rotation. The outer walls at both ends of the feeding rod (42) are respectively provided with auger blades (44) with opposite spiral directions. The bottom of the feeding rod (42) is provided with multiple discharge ports (412) at equal intervals along its central axis.

2. The multi-layer screen type vibrating cleaning screen according to claim 1, characterized in that, The bottom of the feeding tube (41) is provided with two arc-shaped baffles (45) facing each other. The two arc-shaped baffles (45) are respectively connected to the driving mechanism (46) for driving the two arc-shaped baffles (45) to rotate around the central axis of the feeding tube (41) in different directions.

3. The multi-layer screen type vibrating cleaning screen according to claim 2, characterized in that, The drive mechanism (46) includes a rotating connection assembly (461), which includes two sets. One set of the rotating connection assembly (461) is used to rotatably connect one end of the feeding pipe (41) to one end of the two arc-shaped baffles (45), and the other set of the rotating connection assembly (461) is used to rotatably connect the other end of the feeding pipe (41) to the other end of the two arc-shaped baffles (45).

4. The multi-layer screen type vibrating cleaning screen according to claim 3, characterized in that, The rotating connection assembly (461) includes a fixed shaft (4611) mounted on the feed pipe (41), and two rotating sleeves (4613) are rotatably mounted on the fixed shaft (4611) via bearings (4612). The two rotating sleeves (4613) are respectively connected to the arc-shaped baffle (45) via connecting rods (4614).

5. The multi-layer screen type vibrating cleaning screen according to claim 4, characterized in that, The drive mechanism (46) further includes a drive assembly (462) connected to the rotary connection assembly (461). The power provided by the drive assembly (462) is transmitted to the two arc-shaped baffles (45) through the rotary connection assembly (461) to drive the two arc-shaped baffles (45) to rotate around the central axis of the feed tube (41) in different directions.

6. The multi-layer screen type vibrating cleaning screen according to claim 5, characterized in that, The drive assembly (462) includes two driven bevel teeth (4621) mounted on two rotating sleeves (4613) of the same rotating connection assembly (461). The two driven bevel teeth (4621) respectively mesh with the active bevel teeth (4622), and the active bevel teeth (4622) are connected to a drive member (4623) for driving their rotation.

7. The multi-layer screen type vibrating cleaning screen according to claim 1, characterized in that, The discharge port (412) gradually increases in size from the middle of the feeding pipe (41) to both ends of the feeding pipe (41).

8. The multi-layer screen type vibrating cleaning screen according to claim 1, characterized in that, The bottom of the feed hopper (3) is funnel-shaped.

9. The multi-layer screen type vibrating cleaning screen according to claim 1, characterized in that, The screen (2) includes an upper screen (21), a middle screen (22) and a lower screen (23) arranged from top to bottom. The screening box (1) has a first discharge port (11) on one side wall for discharging large particles of impurities from the upper screen (21) and the middle screen (22). The screening box (1) has a second discharge port (12) at one end for discharging material from the lower screen (23). The screening box (1) has a third discharge port (13) at the bottom of one end for discharging small particles of impurities from the bottom of the screening box (1).

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