Radish seed screening and grading structure
By designing a radish seed screening and grading structure with a base plate, mounting plate, screening cylinder, and dust removal mechanism, the problems of dust pollution and cumbersome seed removal in traditional equipment have been solved, achieving efficient and safe seed screening and retrieval.
Patent Information
- Application Number
- CN202520327915.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-27
AI Technical Summary
Traditional radish seed screening and grading equipment generates a lot of dust during operation, affecting the health of operators and the environment. Furthermore, the process of removing the sieved seeds is cumbersome and inefficient, and can easily cause secondary mixing of the seeds.
A radish seed screening and grading structure was designed, which includes a base plate, a mounting plate, a screening cylinder, a vibrating motor, and a dust removal mechanism. Dust is removed by a dust pump and a ventilation pipe, and seeds are easily retrieved by a motor-driven rotating roller and a cam mechanism.
It effectively prevents dust pollution, improves the air quality of the working environment, reduces occupational health risks, simplifies the seed extraction process, and improves the efficiency and accuracy of screening and grading.
Smart Images
Figure CN223847474U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to radish seed screening technical field, concretely is a radish seed screening grading structure. BACKGROUND
[0002] Radish is a common crop, in the production and processing process of radish seed, seed screening grading is an important link, is related to seed quality and subsequent planting effect, radish device needs to use screening device in the screening process.
[0003] Most of the traditional radish seed screening grading equipment in the working, the seed turning and screening inevitably produce a large amount of dust, these dusts will diffuse in the working environment, not only make the air quality of workplace deteriorate, affect the health of operating personnel, long-term inhalation can cause respiratory diseases and other occupational health problems, and the dust will also drift to the surrounding environment, affect the living quality of nearby residents and the growth environment of surrounding plants and animals, the traditional equipment after completing radish seed screening, the process of taking out the screened seed from the equipment is very cumbersome. Due to the lack of special salvage structure, often need manual salvage into the screening device interior, not only inconvenient operation, low efficiency, and in the salvage process, easy to cause the secondary mixing of seeds, affect the accuracy of screening grading, reduce the working efficiency, in view of this, we propose a radish seed screening grading structure. UTILITARIAN CONTENT
[0004] The utility model aims at providing a radish seed screening grading structure to solve the above background art, most of the traditional radish seed screening grading equipment in the working, the seed turning and screening inevitably produce a large amount of dust, these dusts will diffuse in the working environment, not only make the air quality of workplace deteriorate, affect the health of operating personnel, long-term inhalation can cause respiratory diseases and other occupational health problems, and the dust will also drift to the surrounding environment, affect the living quality of nearby residents and the growth environment of surrounding plants and animals, the traditional equipment after completing radish seed screening, the process of taking out the screened seed from the equipment is very cumbersome. Due to the lack of special salvage structure, often need manual salvage into the screening device interior, not only inconvenient operation, low efficiency, and in the salvage process, easy to cause the secondary mixing of seeds, affect the accuracy of screening grading, reduce the working efficiency problem.
[0005] To achieve the above object, the utility model provides the following technical scheme:
[0006] The application discloses a radish seed screening grading structure, which comprises a bottom plate, a mounting plate arranged above the bottom plate, a plurality of springs arranged between the mounting plate and the bottom plate, a screening cylinder fixed to the mounting plate through a plurality of supporting legs, a cylinder cover closely combined with the top surface of the screening cylinder, two placing frames fixed to the cylinder cover and arranged from top to bottom, an upper sieve plate arranged on the circumferential inner wall of the upper placing frame, a lower sieve plate arranged on the circumferential inner wall of the lower placing frame, a vibration motor arranged on the top surface of the mounting plate, an air pipe fixed to the side wall of the screening cylinder and connected with the inner cavity of the screening cylinder and arranged below the two placing frames, and a one-way valve arranged on the outer wall of the air pipe.
[0007] A dust removal mechanism is arranged on the top surface of the mounting plate and used for sucking and removing dust in the screening cylinder, and the dust removal mechanism comprises a vertical plate fixed to the top surface of the mounting plate and shaped as an L-shaped plate, a rotating roller rotatably connected to the horizontal plate end of the vertical plate, a rotating column coaxially fixed to the bottom surface of the rotating roller and rotatably connected to the mounting plate, a cylindrical cam coaxially fixed to the circumferential outer wall of the rotating roller, a moving block slidingly connected to the front side surface of the vertical plate end of the vertical plate, a fixed plate fixed to the top surface of the cylinder cover, a connecting rod fixed between the fixed plate and the moving block, a dust suction pipe fixed to the top surface of the cylinder cover and connected with the inner cavity of the screening cylinder, a dust suction pump arranged on the top surface of the fixed plate, a rotating rod coaxially fixed to the top surface of the rotating roller, and a motor arranged on the top surface of the horizontal plate end of the vertical plate and used for driving the rotating rod to rotate.
[0008] As a preferred embodiment, the dust removal mechanism further comprises two gears arranged above the horizontal plate end of the vertical plate and meshed with each other, and a rotating shaft coaxially connected with the output shaft of the motor, and the two gears are coaxially fixed to the circumferential outer walls of the rotating shaft and the rotating rod respectively.
[0009] As a preferred embodiment, the front side surface of the vertical plate end of the vertical plate is provided with a guide groove, and the rear side surface of the moving block is fixed with a guide block slidingly connected with the guide groove of the front side surface of the vertical plate end of the vertical plate.
[0010] As a preferred embodiment, the top surface of the cylinder cover is fixed with a feeding hopper connected with the inner cavity of the screening cylinder, the bottom end of the screening cylinder is fixed with a discharging pipe connected with the inner cavity of the screening cylinder, and the outer walls of the feeding hopper pipe body and the discharging pipe are both provided with solenoid valves.
[0011] In a preferred embodiment, a pad is fixed between the spring, the base plate, and the mounting plate. Several fixing posts are fixed between the upper placement frame, the lower placement frame, and the cylinder cover. The size of the screen holes on the top surface of the upper screen plate is larger than the size of the screen holes on the top surface of the lower screen plate. The outer circumference of the two placement frames and the inner circumference of the screening cylinder are on the same horizontal plane. The outer circumference of the upper screen plate and the inner circumference of the placement frame on the same side are on the same horizontal plane, and the outer circumference of the lower screen plate and the inner circumference of the placement frame on the same side are also on the same horizontal plane.
[0012] In a preferred embodiment, the inner circumferential wall of the screening cylinder is provided with two sliding grooves, and the outer circumferential wall of the placement frame is fixed with two sliders that are slidably connected to the sliding grooves on the same side of the inner wall of the screening cylinder.
[0013] In a preferred embodiment, the bottom end of the base plate is fixed with an anti-slip plate that is adapted to its shape, and the thickness of the anti-slip plate is 2-7cm.
[0014] In a preferred embodiment, the dust removal mechanism further includes a protective box fixed to the top surface of the vertical and horizontal plates, the motor is located inside the protective box, and the rotating shaft passes through the top surface of the protective box.
[0015] In a preferred embodiment, sealing rings are provided at the contact points between the feed hopper and the dust suction pipe and the cylinder cover, sealing rings are provided at the contact points between the dust venting pipe and the dust suction pipe and the dust suction pump, and sealing rings are also provided at the contact points between the screening cylinder and the air venting pipe and the discharge pipe.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] 1. This utility model can screen radish seeds by setting a base plate, mounting plate, screening cylinder, several support legs, cylinder cover, several springs and vibration motor. The dust collection pipe of the external dust collection device is tightly connected to the air outlet of the dust pump. By setting a dust removal mechanism, air pipe and one-way valve, the dust generated during the screening process can be sucked away, thereby preventing the dust generated during the screening process from escaping and causing environmental pollution. The design of the dust removal mechanism also makes it easy to move the two placement frames, upper screen plate and lower screen plate to the outside of the screening cylinder, so as to facilitate the retrieval of the screened radish seeds without manual retrieval, saving time and effort.
[0018] 2. In this utility model, the front surface of the vertical plate end of the upright plate is provided with a guide groove, and the rear surface of the moving block is fixed with a guide block that is slidably connected to the guide groove on the front surface of the vertical plate end of the upright plate. This can guide the movement of the moving block, and thus indirectly guide the movement of the connecting rod, the cylinder cover, the two placement frames, the upper sieve plate, and the lower sieve plate. Attached Figure Description
[0019] Figure 1 It is one of whole structure schematic views of the utility model;
[0020] Figure 2 It is second whole structure schematic view of the utility model;
[0021] Figure 3 It is one of partial exploded views of the utility model;
[0022] Figure 4 It is internal structure schematic view of the screening cylinder in the utility model;
[0023] Figure 5 It is whole structure schematic view of the screening cylinder in the utility model;
[0024] Figure 6 It is second partial exploded view of the utility model;
[0025] Figure 7 It is whole structure schematic view of dust removal mechanism in the utility model;
[0026] Figure 8 It is one of partial exploded views of dust removal mechanism in the utility model;
[0027] Figure 9 It is second partial exploded view of dust removal mechanism in the utility model;
[0028] Figure 10 It is third partial exploded view of dust removal mechanism in the utility model;
[0029] The meaning of each reference numeral in the drawing is as follows:
[0030] 1, bottom plate; 2, mounting plate; 3, screening cylinder; 4, support leg; 5, cylinder cover; 6, spring; 7, vibration motor; 8, dust removal mechanism; 81, vertical plate; 82, rotating roller; 83, rotating column; 84, cylindrical cam; 85, moving block; 86, guide block; 87, sliding column; 88, fixed plate; 89, connecting rod; 810, dust suction pump; 811, dust suction pipe; 812, dust passage pipe; 813, rotating rod; 814, gear; 815, motor; 816, rotating shaft; 817, protection box; 9, pad plate; 10, anti-skid plate; 11, placing frame; 12, fixed column; 13, upper sieve plate; 14, lower sieve plate; 15, sliding block; 16, feeding hopper; 17, discharging pipe; 18, electromagnetic valve; 19, air pipe; 20, check valve. DETAILED DESCRIPTION
[0031] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0032] Please refer to Figures 1-10 The present application provides a technical solution: a radish seed screening and grading structure, which comprises a bottom plate 1, an installation plate 2 arranged above the bottom plate 1, a plurality of springs 6 arranged between the installation plate 2 and the bottom plate 1, a screening cylinder 3 arranged above the installation plate 2 and fixed to the installation plate 2 by a plurality of supporting legs 4, a cylinder cover 5 tightly fitted on the top surface of the screening cylinder 3, two placing frames 11 fixed to the cylinder cover 5 and arranged from top to bottom inside the screening cylinder 3, an upper sieve plate 13 arranged on the circumferential inner wall of the upper placing frame 11, a lower sieve plate 14 arranged on the circumferential inner wall of the lower placing frame 11, a vibration motor 7 arranged on the top surface of the installation plate 2, an air pipe 19 fixed to the side wall of the screening cylinder 3 and connected to the inner cavity of the screening cylinder 3 and arranged below the two placing frames 11, and a one-way valve 20 arranged on the outer wall of the air pipe 19, and further comprising:
[0033] The dust removal mechanism 8 is arranged on the top surface of the mounting plate 2 and used for sucking and removing the dust in the inside of the screening cylinder 3. The dust removal mechanism 8 comprises a vertical plate 81 fixed on the top surface of the mounting plate 2 and shaped as an L-shaped, a rotating roller 82 rotatably connected with the horizontal plate end of the vertical plate 81, a rotating column 83 coaxially fixed on the bottom surface of the rotating roller 82 and rotatably connected with the mounting plate 2, a cylindrical cam 84 coaxially fixed on the circumferential outer wall of the rotating roller 82, a moving block 85 slidably connected with the front side surface of the vertical plate end of the vertical plate 81, a fixed plate 88 fixed on the top surface of the cylinder cover 5, a connecting rod 89 fixed between the fixed plate 88 and the moving block 85, a dust suction pipe 811 fixed on the top surface of the cylinder cover 5 and communicated with the inner cavity of the screening cylinder 3, a dust suction pump 810 mounted on the top surface of the fixed plate 88, a rotating rod 813 coaxially fixed on the top surface of the rotating roller 82, a motor 815 mounted on the top surface of the horizontal plate end of the vertical plate 81 and used for driving the rotating rod 813 to rotate, the dust suction pipe 811 penetrates through the top surface of the cylinder cover 5 and extends to the inside of the screening cylinder 3 close to the top end, the air inlet end of the dust suction pump 810 is tightly sleeved with a dust passing pipe 812 communicated with the inner cavity of the dust suction pipe 811, the circumferential outer wall of the cylindrical cam 84 is provided with a limiting groove in a spiral shape, and the front side surface of the moving block 85 is fixed with a sliding column 87 slidably connected with the limiting groove on the outer wall of the cylindrical cam 84. Through the arrangement of the bottom plate 1, the mounting plate 2, the screening cylinder 3, the plurality of supporting legs 4, the cylinder cover 5, the plurality of springs 6 and the vibrating motor 7, the radish seeds can be screened, the dust collection pipe of the external dust collection device is tightly sleeved with the air outlet end of the dust suction pump 810, the dust removal mechanism 8, the air pipe 19 and the one-way valve 20 are arranged to suck and remove the dust generated in the screening process, so that the dust generated in the screening process can be prevented from escaping to cause environmental pollution, and the design of the dust removal mechanism 8 facilitates the movement of the two placing frames 11, the upper sieve plate 13 and the lower sieve plate 14 to the outside of the screening cylinder 3, thereby facilitating the fishing of the screened radish seeds without manual fishing, saving time and effort.
[0034] In the embodiment, the dust removal mechanism 8 further comprises two gears 814 located above the horizontal plate end of the vertical plate 81 and meshing with each other, and a rotating shaft 816 coaxially connected with the output shaft of the motor 815, and the two gears 814 are coaxially fixed on the circumferential outer walls of the rotating shaft 816 and the rotating rod 813, so that the two gears 814 can be smoothly driven to rotate, and the rotating rod 813 and the cylindrical cam 84 can be smoothly driven to rotate.
[0035] In addition, the front side surface of the vertical plate end of the vertical plate 81 is provided with a guide groove, and the rear side surface of the moving block 85 is fixed with a guide block 86 slidably connected with the guide groove on the front side surface of the vertical plate end of the vertical plate 81, so that the movement of the moving block 85 can be guided, and the movement of the connecting rod 89, the cylinder cover 5, the two placing frames 11, the upper sieve plate 13 and the lower sieve plate 14 can be indirectly guided.
[0036] Further, the top surface of the cylinder cover 5 is fixed with a feeding funnel 16 communicated with the inner cavity of the screening cylinder 3, the bottom end of the screening cylinder 3 is fixed with a discharging pipe 17 communicated with the inner cavity of the screening cylinder 3, and the outer wall of the pipe body of the feeding funnel 16 and the discharging pipe 17 is respectively provided with an electromagnetic valve 18, so that the radish seeds can be smoothly added into the screening cylinder 3, and the radish seeds with the smallest particle size can be conveniently discharged.
[0037] Further, the spring 6 is fixed with a pad plate 9 between the bottom plate 1 and the mounting plate 2, a plurality of fixing columns 12 are fixed between the upper placement frame 11 and the lower placement frame 11 and the cylinder cover 5, the size of the sieve hole on the top surface of the upper sieve plate 13 is greater than that of the sieve hole on the top surface of the lower sieve plate 14, the circumferential outer wall of the two placement frames 11 and the circumferential inner wall of the screening cylinder 3 are located on the same horizontal plane, the circumferential outer wall of the upper sieve plate 13 and the circumferential inner wall of the same side placement frame 11 are located on the same horizontal plane, and the circumferential outer wall of the lower sieve plate 14 and the circumferential inner wall of the same side placement frame 11 are also located on the same horizontal plane, so that the seeds can be prevented from passing through the gap between the screening cylinder 3 and the two placement frames 11, and the seeds can be prevented from passing through the gap between the upper sieve plate 13 and the same side placement frame 11 and the gap between the lower sieve plate 14 and the same side placement frame 11.
[0038] Specifically, the circumferential inner wall of the screening cylinder 3 is provided with two sliding grooves, and the circumferential outer wall of the placement frame 11 is fixed with two sliding blocks 15 slidably connected with the same side sliding grooves on the inner wall of the screening cylinder 3, so that the movement of the two placement frames 11, the upper sieve plate 13 and the lower sieve plate 14 can be further guided.
[0039] Notably, the bottom end of the bottom plate 1 is fixed with an anti-skid plate 10 matched with the shape of the bottom plate 1, and the thickness of the anti-skid plate 10 is 2-7 cm, preferably 5 cm, so that the friction between the entire device and the ground can be increased, and the entire device can be more stable during operation.
[0040] It is worth noting that the dust removal mechanism 8 further comprises a protection box 817 fixed on the top surface of the horizontal plate end of the vertical plate 81, the motor 815 is located in the protection box 817, and the rotating shaft 816 penetrates the top surface of the protection box 817, so that the motor 815 can be protected, thereby prolonging the service life of the motor 815.
[0041] It is worth emphasizing that the parts of the feeding funnel 16 and the dust suction pipe 811 in contact with the cylinder cover 5 are provided with sealing rings, the parts of the dust passage pipe 812 in contact with the dust suction pipe 811 and the dust suction pump 810 are provided with sealing rings, and the parts of the screening cylinder 3 in contact with the air passage pipe 19 and the discharging pipe 17 are also provided with sealing rings, so that the sealing performance of the entire device can be better, thereby preventing air leakage and material leakage.
[0042] It needs to be added that the vibration motor 7, the dust suction pump 810, the motor 815 and the two electromagnetic valves 18 are electrically connected with the external PLC through wires, the vibration motor 7, the dust suction pump 810, the motor 815 and the two electromagnetic valves 18 are electrically connected with the external power supply through wires, and the external PLC is also electrically connected with the external power supply through wires.
[0043] Finally, it needs to be pointed out that the vibration motor 7, the dust suction pump 810, the motor 815 and the two electromagnetic valves 18 involved in the utility model are all general standard parts or parts known to those skilled in the art, the structure and principle of which can be known by the technical personnel through the technical manual or through the conventional experimental method, at the idle place of the device, all the electrical components, power elements, electrical components and the matched controller and power supply are connected through wires, the specific connection means should be referred to the working principle in the utility model, the electrical components are electrically connected according to the working order, and the detailed connection means are all the known technology in the art.
[0044] In the specific use process of the embodiment, when seed screening work is needed, first, the collecting pipe of the external dust collecting device is tightly sleeved with the air inlet end of the dust suction pump 810, the electromagnetic valve 18 on the outer wall of the feeding hopper 16 is started by the external PLC, then the appropriate radish seeds are added to the inside of the screening cylinder 3 through the feeding hopper 16, then the electromagnetic valve 18 is closed by the external PLC, then the dust suction pump 810 and the vibration motor 7 are started by the external PLC, the vibration motor 7 is started to indirectly drive the screening cylinder 3, the two placing frames 11, the upper sieve plate 13 and the lower sieve plate 14 to vibrate, the screening cylinder 3 vibrates under the support of the plurality of springs 6 and the plurality of pad plates 9, the two placing frames 11, the upper sieve plate 13 and the lower sieve plate 14 vibrate to screen the radish seeds, and the dust suction pump 810 is started to suck the dust in the inside of the screening cylinder 3 into the inside of the dust suction pipe 811, the dust in the inside of the dust suction pipe 811 then enters the dust passage 812 and enters the inside of the external dust collecting device through the external collecting pipe, when the screening is finished, the vibration motor 7 and the dust suction pump 810 are closed by the external PLC, then the external collecting box is placed on the top surface of the mounting plate 2 and corresponds to the position of the discharging pipe 17, the electromagnetic valve 18 on the outer wall of the discharging pipe 17 is started by the external PLC to discharge the radish seeds in the inside of the screening cylinder 3;
[0045] Then the motor 815 is started by the external PLC, the output shaft of the motor 815 rotates to drive the rotating shaft 816 coaxially connected with the output shaft to rotate, the rotating shaft 816 rotates to drive the same side gear 814 fixedly connected with the rotating shaft to rotate, the gear 814 rotates to drive another gear 814 engaged with the gear to rotate, the other gear 814 rotates to drive the rotating rod 813 fixedly connected with the other gear to rotate, the rotating rod 813 rotates to drive the rotating roller 82 fixedly connected with the rotating rod to rotate, the rotating roller 82 rotates to drive the cylindrical cam 84 fixedly connected with the rotating roller to rotate, the cylindrical cam 84 rotates to drive the sliding column 87 slidingly connected with the limiting groove on the outer wall of the cylindrical cam to move, the sliding column 87 moves upward under the guidance of the moving block 85, the guide block 86 and the vertical plate end front side surface guide groove of the vertical plate 81, the sliding column 87 moves to drive the moving block 85 to move upward at the same time, the moving block 85 moves to drive the fixed plate 88 fixedly connected with the moving block by the connecting rod 89 to move upward, the fixed plate 88 moves to drive the cylinder cover 5, the two placing frames 11, the upper sieve plate 13 and the lower sieve plate 14 to move upward, the two placing frames 11 move under the guidance of the two same side sliding blocks 15 and the two sliding grooves on the inner wall of the screening cylinder 3, until the lower sieve plate 14 moves to the appropriate position above the screening cylinder 3, the motor 815 is turned off by the external PLC, and then the radish seeds can be salvaged.
[0046] The basic principle, main characteristics and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and do not limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. A radish seed screening grading structure comprising a base plate (1), characterized in that, The bottom plate (1) is provided with a mounting plate (2) above it, a plurality of springs (6) are installed between the mounting plate (2) and the bottom plate (1), a screening cylinder (3) is provided above the mounting plate (2) and fixed thereto by a plurality of supporting legs (4), a cylinder cover (5) is provided on the top surface of the screening cylinder (3) and closely attached thereto, two placing frames (11) are provided inside the screening cylinder (3) and fixed to the cylinder cover (5) and arranged from top to bottom, an upper sieve plate (13) is installed on the circumferential inner wall of the upper placing frame (11), a lower sieve plate (14) is installed on the circumferential inner wall of the lower placing frame (11), a vibration motor (7) is installed on the top surface of the mounting plate (2), an air pipe (19) is fixed to the side wall of the screening cylinder (3) and communicates with the inner cavity of the screening cylinder (3) and is located below the two placing frames (11), a one-way valve (20) is installed on the outer wall of the air pipe (19), and the dust removal mechanism (8) is further provided. A dust removal mechanism (8) is provided on the top surface of the mounting plate (2) and used for sucking and removing dust inside the screening cylinder (3), the dust removal mechanism (8) comprises a vertical plate (81) fixed on the top surface of the mounting plate (2) and shaped as an L-shaped, a rotating roller (82) rotatably connected to the horizontal plate end of the vertical plate (81), a rotating column (83) coaxially fixed on the bottom surface of the rotating roller (82) and rotatably connected to the mounting plate (2), a cylindrical cam (84) coaxially fixed on the circumferential outer wall of the rotating roller (82), a moving block (85) slidably connected to the front side surface of the vertical plate end of the vertical plate (81), a fixed plate (88) fixed on the top surface of the cylinder cover (5), a connecting rod (89) fixed between the fixed plate (88) and the moving block (85), a dust suction pipe (811) fixed on the top surface of the cylinder cover (5) and communicating with the inner cavity of the screening cylinder (3), a dust suction pump (810) installed on the top surface of the fixed plate (88), a rotating rod (813) coaxially fixed on the top surface of the rotating roller (82), and a motor (815) installed on the top surface of the horizontal plate end of the vertical plate (81) and used for driving the rotating rod (813) to rotate, the dust suction pipe (811) penetrates through the top surface of the cylinder cover (5) and extends to the inside of the screening cylinder (3) near the top end, the air inlet end of the dust suction pump (810) is tightly sleeved with a dust passage pipe (812) communicating with the inner cavity of the dust suction pipe (811), the circumferential outer wall of the cylindrical cam (84) is provided with a limiting groove in a spiral shape, and the front side surface of the moving block (85) is fixed with a sliding column (87) slidably connected with the limiting groove on the outer wall of the cylindrical cam (84).
2. The radish seed screening hierarchy of claim 1, wherein: The dust removal mechanism (8) further comprises two gears (814) meshing with each other above the horizontal plate end of the vertical plate (81), and a rotating shaft (816) coaxially connected with the output shaft of the motor (815), and the two gears (814) are coaxially fixed on the circumferential outer wall of the rotating shaft (816) and the rotating rod (813), respectively.
3. The radish seed screening hierarchy of claim 1, wherein: The vertical plate (81) is provided with a guide groove on the front side surface of the vertical plate end, and the rear side surface of the moving block (85) is fixed with a guide block (86) slidably connected with the guide groove on the front side surface of the vertical plate end of the vertical plate (81).
4. The radish seed screening hierarchy of claim 1, wherein: The top surface of the cylinder cover (5) is fixed with a feeding funnel (16) communicated with the inner cavity of the screening cylinder (3), the bottom end of the screening cylinder (3) is fixed with a discharging pipe (17) communicated with the inner cavity thereof, and the outer wall of the pipe body of the feeding funnel (16) and the discharging pipe (17) is respectively provided with an electromagnetic valve (18).
5. The radish seed screening hierarchy of claim 1, wherein: The spring (6) is fixed with a backing plate (9) between the bottom plate (1) and the mounting plate (2), a plurality of fixing columns (12) are fixed between the upper placement frame (11) and the lower placement frame (11) and the cylinder cover (5), the size of the sieve hole on the top surface of the upper sieve plate (13) is greater than that of the lower sieve plate (14), the circumferential outer wall of the two placement frames (11) and the circumferential inner wall of the screening cylinder (3) are on the same horizontal plane, the circumferential outer wall of the upper sieve plate (13) and the circumferential inner wall of the same side placement frame (11) are on the same horizontal plane, and the circumferential outer wall of the lower sieve plate (14) and the circumferential inner wall of the same side placement frame (11) are also on the same horizontal plane.
6. The radish seed screening hierarchy of claim 1, wherein: The circumferential inner wall of the screening cylinder (3) is provided with two sliding grooves, and the circumferential outer wall of the placement frame (11) is fixed with two sliding blocks (15) slidably connected with the same side sliding grooves on the inner wall of the screening cylinder (3).
7. The radish seed screening hierarchy of claim 1, wherein: The bottom end of the bottom plate (1) is fixed with an anti-skid plate (10) matched in shape, and the thickness of the anti-skid plate (10) is 2-7cm.
8. The radish seed screening hierarchy of claim 2, wherein: The dust removal mechanism (8) further comprises a protection box (817) fixed on the top surface of the horizontal plate end of the vertical plate (81), the motor (815) is located in the protection box (817), and the rotating shaft (816) penetrates the top surface of the protection box (817).
9. The radish seed screening hierarchy of claim 4, wherein: The feeding funnel (16) and the dust suction pipe (811) are provided with sealing rings at the positions in contact with the cylinder cover (5), the dust suction pipe (812) and the dust suction pipe (811) and the dust suction pump (810) are provided with sealing rings at the positions in contact with each other, and the screening cylinder (3) and the air pipe (19) and the discharging pipe (17) are also provided with sealing rings at the positions in contact with each other.