CN112387585A - Corn screening device - Google Patents
Corn screening device Download PDFInfo
- Publication number
- CN112387585A CN112387585A CN202011290012.4A CN202011290012A CN112387585A CN 112387585 A CN112387585 A CN 112387585A CN 202011290012 A CN202011290012 A CN 202011290012A CN 112387585 A CN112387585 A CN 112387585A
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- CN
- China
- Prior art keywords
- screening
- screening box
- corn
- box
- net
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
- B07B1/30—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro within their own plane in or approximately in or transverse to the direction of conveyance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/005—Transportable screening plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/04—Cleaning by suction, with or without auxiliary action
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M3/00—Portable or wheeled frames or beds, e.g. for emergency power-supply aggregates, compressor sets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
Abstract
The invention relates to the technical field of agricultural machinery, in particular to a corn screening device, which improves the screening effect of corn and reduces the limitation of the use of the device; the large screening net is inserted into an opening of the screening box, the front end and the rear end of the large screening net are slidably connected with the inner wall of a cavity of the screening box, the right end of the motor support is connected with the outer wall of the screening box, the bottom end of the power motor is connected with the top end of the motor support, a rotating wheel is arranged at the output end of the power motor, the left end of the connecting rod is rotatably connected with the front end of the rotating wheel through the rotating shaft, the right end of the connecting rod is rotatably connected with the left end of the large screening net through a hinge, the small screening net is obliquely and fixedly installed in the cavity of the large screening net, and the bottom end of the small screening net is connected with the bottom end of a discharge port of the screening box.
Description
Technical Field
The invention relates to the technical field of agricultural machinery, in particular to a corn screening device.
Background
Corn is an annual herbaceous plant of the family poaceae. Also named as corn, corn cob, corn, pearl rice, etc. As a high-yield grain crop in china, corn is an important feed source in animal husbandry, aquaculture, and the like, and is one of indispensable raw materials for food, medical care, light industry, chemical industry, and the like.
After the corns are harvested, threshing and screening are needed, so that a better using effect is achieved, manual screening labor force can be reduced by the screening equipment, and screening efficiency is accelerated. The corn screening equipment in the current market is generally simple in structure and does not have the function of screening out the corn kernels with incomplete grains, so that the using effect of the corn is poor.
Disclosure of Invention
In order to solve the technical problems, the invention provides the corn screening device which can improve the screening effect of the corn and reduce the limitation of the use of the device.
The corn screening device comprises a screening box, a large screening net, a motor bracket, a power motor, a connecting rod, a rotating shaft, a small screening net and a fan bracket, wherein a cavity is arranged inside the screening box, a feed inlet is formed in the top end of the screening box, a discharge outlet and an opening are respectively formed in the side wall of the screening box, the feed inlet, the discharge outlet and the opening are communicated with the cavity of the screening box, the large screening net is inserted into the opening of the screening box, the front end and the rear end of the large screening net are slidably connected with the inner wall of the cavity of the screening box, the right end of the motor bracket is connected with the outer wall of the screening box, the bottom end of the power motor is connected with the top end of the motor bracket, a rotating wheel is arranged at the output end of the power motor, the left end of the connecting rod is rotatably connected with the front end of the rotating wheel through the rotating shaft, the right end of the connecting rod is rotatably connected with the left end of the large screening net through a hinge, the bottom of the small-size screening net is connected with the bottom of the discharge port of the screening box, and the left end of the small-size screening net extends to the outer side of the screening box.
The corn screening device also comprises a fan bracket, an exhaust fan and a connecting pipe, wherein the side wall of the screening box is provided with a dust suction port, the dust suction port is communicated with a cavity of the screening box, the input end of the connecting pipe is communicated with the dust suction port of the screening box, the left end of the fan bracket is connected with the outer wall of the screening box, the bottom end of the exhaust fan is connected with the top end of the fan bracket, and the input end of the exhaust fan is communicated with the output end of the connecting pipe.
The corn screening device also comprises a neck ring and a blocking cover, wherein the side wall of the screening box is provided with a first cleaning hole, the first cleaning hole is communicated with a cavity of the screening box, the first cleaning hole is arranged above a large-size screening net, the input end of the neck ring is communicated with the first cleaning hole of the screening box, and the left end of the blocking cover is detachably connected with the right end of the neck ring through a bolt.
The corn screening device also comprises a vibration motor, wherein the top end of the vibration motor is connected with the bottom end of the small-size screening net.
The corn screening device also comprises a funnel, wherein the output end of the funnel is communicated with the feeding hole of the screening box.
The corn screening device also comprises a cleaning pipe, wherein the side wall of the screening box is provided with a second cleaning hole, the second cleaning hole is communicated with the cavity of the screening box, the second cleaning hole is arranged below the small-size screening net, and the input end of the cleaning pipe is communicated with the second cleaning hole of the screening box.
The corn screening device also comprises four groups of trundles, and the top ends of the four groups of trundles are connected with the bottom end of the screening box.
The corn screening device also comprises four groups of cylinders and four groups of feet, wherein the side walls of the four groups of cylinders are connected with the side wall of the screening box, and the top ends of the four groups of feet are respectively connected with the output ends of the four groups of cylinders.
Compared with the prior art, the invention has the beneficial effects that: carry the maize to the feed inlet department of screening case through the machine of raising, then the feed inlet through the screening case drops on the top of large-size screening net, open motor power, motor power output drives the runner rotation, the runner drives large-size screening net horizontal hunting through the connecting rod, large-size screening net filters the corncob that is mingled with in the maize, corn bract and debris, the maize granule drops to the top of small-size screening net through the mesh hole of large-size screening net, the discharge gate discharge of saturated maize granule through the screening case, unsaturated maize granule and dust drop to the cavity bottom of screening case through the screen cloth sky of small-size screening net, improve the screening effect of maize, the limitation that the reducing means used.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the right-hand side view of the present invention;
FIG. 3 is a schematic top view of the present invention;
FIG. 4 is a schematic view of a portion of the enlarged structure of A in FIG. 3;
FIG. 5 is a schematic view of a portion of B in FIG. 1;
in the drawings, the reference numbers: 1. a screening box; 2. a large-size screening net; 3. a motor bracket; 4. a power motor; 5. a rotating wheel; 6. a connecting rod; 7. a rotating shaft; 8. a small-size screening net; 9. a fan bracket; 10. an exhaust fan; 11. a connecting pipe; 12. a collar; 13. blocking the cover; 14. a vibration motor; 15. a funnel; 16. cleaning the pipe; 17. a caster wheel; 18. a cylinder; 19. and (5) ground feet.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1 to 5, the corn screening device of the invention comprises a screening box 1, a large screening net 2, a motor bracket 3, a power motor 4, a connecting rod 6, a rotating shaft 7, a small screening net 8 and a fan bracket 9, wherein a cavity is arranged inside the screening box 1, a feed inlet is arranged at the top end of the screening box 1, a discharge outlet and an opening are respectively arranged on the side wall of the screening box 1, the feed inlet, the discharge outlet and the opening are all communicated with the cavity of the screening box 1, the large screening net 2 is inserted into the opening of the screening box 1, the front end and the rear end of the large screening net 2 are both slidably connected with the inner wall of the cavity of the screening box 1, the right end of the motor bracket 3 is connected with the outer wall of the screening box 1, the bottom end of the power motor 4 is connected with the top end of the motor bracket 3, the output end of the power motor 4 is provided with a rotating wheel 5, the left end of the connecting rod 6 is, the right end of the connecting rod 6 is rotatably connected with the left end of the large screening net 2 through a hinge, the small screening net 8 is obliquely and fixedly installed in the cavity of the large screening net 2, the bottom end of the small screening net 8 is connected with the bottom end of the discharge port of the screening box 1, and the left end of the small screening net 8 extends to the outer side of the screening box 1; carry the maize to the feed inlet department of screening case 1 through the machine of raising, then the feed inlet through screening case 1 drops on the top of No. 2 screening nets, open motor power 4, motor power 4 output power drives the runner 5 rotatory, runner 5 drives No. 2 horizontal hunting of No. 2 screening nets through connecting rod 6, No. 2 screening nets filter the corncob that mix with in the maize, corn bract and debris, the corn grain drops to the top of No. 8 screening nets through No. 2 screening nets's screen hole, the saturated corn grain is discharged through the discharge gate of screening case 1, the not full corn grain and dust drop to the cavity bottom of screening case 1 through No. 8 screening nets's screen cloth sky, improve the screening effect of maize, the limitation that the reduction device used.
The corn screening device also comprises a fan bracket 9, an exhaust fan 10 and a connecting pipe 11, wherein the side wall of the screening box 1 is provided with a dust suction port, the dust suction port is communicated with the cavity of the screening box 1, the input end of the connecting pipe 11 is communicated with the dust suction port of the screening box 1, the left end of the fan bracket 9 is connected with the outer wall of the screening box 1, the bottom end of the exhaust fan 10 is connected with the top end of the fan bracket 9, and the input end of the exhaust fan 10 is communicated with the output end of the connecting pipe 11; with air exhauster 10's output and collection dirt sack intercommunication, at the screening process, open air exhauster 10, air exhauster 10 will screen the garrulous little corn bract in case 1 cavity and dust suction and carry to the collection dirt sack through connecting pipe 11 in, the effectual dust that produces of absorption in the screening reduces the pollution of dust to the environment, improves the feature of environmental protection of device.
The corn screening device also comprises a neck ring 12 and a blocking cover 13, wherein the side wall of the screening box 1 is provided with a first cleaning hole, the first cleaning hole is communicated with a cavity of the screening box 1, the first cleaning hole is arranged above the large-size screening net 2, the input end of the neck ring 12 is communicated with the first cleaning hole of the screening box 1, and the left end of the blocking cover 13 is detachably connected with the right end of the neck ring 12 through a bolt; through setting up the cervical collar 12, when the top of large-size screening net 2 filters the thing too much, easily cause large-size screening net 2 to block up, reduce screening efficiency, open blanking cover 13, be convenient for clear up the filtration thing on the top of large-size screening net 2, improve the convenience of device.
The corn screening device also comprises a vibration motor 14, wherein the top end of the vibration motor 14 is connected with the bottom end of the small-size screening net 8; through setting up vibrating motor 14, the screening efficiency of small size screening net 8 is accelerated in the vibration that vibrating motor 14 produced, improves the work efficiency of device.
The corn screening device also comprises a funnel 15, wherein the output end of the funnel 15 is communicated with the feed inlet of the screening box 1; through setting up funnel 15, increase the feeding area of device, improve the practicality of device.
The corn screening device also comprises a cleaning pipe 16, wherein the side wall of the screening box 1 is provided with a second cleaning hole, the second cleaning hole is communicated with the cavity of the screening box 1, the second cleaning hole is arranged below the small-size screening net 8, and the input end of the cleaning pipe 16 is communicated with the second cleaning hole of the screening box 1; through setting up clearance pipe 16, be convenient for clear up the not full maize granule of screening to screening case 1 cavity bottom, improve the convenience of device.
The corn screening device also comprises four groups of trundles 17, wherein the top ends of the four groups of trundles 17 are connected with the bottom end of the screening box 1; by arranging four groups of trundles 17, the device can be conveniently shifted, and the convenience of the device is improved.
The corn screening device also comprises four groups of cylinders 18 and four groups of feet 19, wherein the side walls of the four groups of cylinders 18 are connected with the side wall of the screening box 1, and the top ends of the four groups of feet 19 are respectively connected with the output ends of the four groups of cylinders 18; when the device moves to a proper position through the four groups of trundles 17, the four groups of air cylinders 18 are opened, telescopic joints of the four groups of air cylinders 18 respectively push the four groups of feet 19 to move downwards, after the bottom ends of the four groups of feet 19 are contacted with the ground, the four groups of trundles 17 are separated from the ground, the device can generate vibration in the operation process, the four groups of feet 19 are fixed, the device does not move due to vibration, and the stability of the device is improved.
The corn screening device of the invention is operated, firstly, the device is moved to a proper position through four groups of trundles, four groups of air cylinders are opened, telescopic joints of the four groups of air cylinders respectively push the four groups of ground feet to move downwards, the four groups of the trundles are separated from the ground after the bottom ends of the four groups of the ground feet are contacted with the ground, then, the corn is conveyed into a hopper through a lifting machine, then the corn falls on the top end of a large-size screening net through the hopper, a power motor is opened, the power motor outputs power to drive a rotating wheel to rotate, the rotating wheel drives the large-size screening net to swing left and right through a connecting rod, the large-size screening net filters corn cobs, corn bracts and sundries which are mixed in the corn, the corn particles fall to the top end of a small-size screening net through the screen holes of the large-size screening net, then, a vibration motor is opened, the vibration motor generates vibration to, the empty cavity bottom that drops to the screening case that drops of screen cloth of full maize granule and dust through the screen cloth of small size screening net simultaneously with the output and the collection dirt sack intercommunication of air exhauster, opens the air exhauster, and the air exhauster will screen the garrulous little corn bract in the case cavity and dust suction through the connecting pipe and carry to collection dirt sack can.
The corn screening device has the advantages that the installation mode, the connection mode or the arrangement mode are common mechanical modes, and the corn screening device can be implemented as long as the beneficial effects of the corn screening device can be achieved; the power motor, the exhaust fan, the vibration motor and the air cylinder of the corn screening device are purchased from the market, and technicians in the industry only need to install and operate the corn screening device according to the attached operating instructions.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A corn screening device is characterized by comprising a screening box (1), a large-size screening net (2), a motor support (3), a power motor (4), a connecting rod (6), a rotating shaft (7), a small-size screening net (8) and a fan support (9), wherein a cavity is arranged inside the screening box (1), a feeding hole is formed in the top end of the screening box (1), a discharging hole and an opening are respectively formed in the side wall of the screening box (1), the feeding hole, the discharging hole and the opening are all communicated with the cavity of the screening box (1), the large-size screening net (2) is inserted into the opening of the screening box (1), the front end and the rear end of the large-size screening net (2) are both connected with the inner wall of the cavity of the screening box (1) in a sliding manner, the right end of the motor support (3) is connected with the outer wall of the screening box (1), the bottom end of the power motor (4) is connected with the top end of the motor support (3, the output of motor power (4) is provided with runner (5), and the front end rotatable coupling of pivot (7) and runner (5) is passed through to the left end of connecting rod (6), and the right-hand member of connecting rod (6) passes through hinge rotatable coupling with the left end of large-size screening net (2), and slope fixed mounting is in the cavity of large-size screening net (2) for the small-size screening net (8), the bottom of small-size screening net (8) is connected with the discharge gate bottom of screening case (1) to the left end of small-size screening net (8) extends to the outside of screening case (1).
2. The corn screening device according to claim 1, further comprising a fan bracket (9), an exhaust fan (10) and a connecting pipe (11), wherein a dust suction port is formed in the side wall of the screening box (1), the dust suction port is communicated with the cavity of the screening box (1), the input end of the connecting pipe (11) is communicated with the dust suction port of the screening box (1), the left end of the fan bracket (9) is connected with the outer wall of the screening box (1), the bottom end of the exhaust fan (10) is connected with the top end of the fan bracket (9), and the input end of the exhaust fan (10) is communicated with the output end of the connecting pipe (11).
3. The corn screening device as claimed in claim 2, characterized by further comprising a collar (12) and a blocking cover (13), wherein the side wall of the screening box (1) is provided with first cleaning holes which are communicated with the cavity of the screening box (1), the first cleaning holes are arranged above the large-size screening net (2), the input end of the collar (12) is communicated with the first cleaning holes of the screening box (1), and the left end of the blocking cover (13) is detachably connected with the right end of the collar (12) through bolts.
4. A corn screening apparatus as claimed in claim 3, further comprising a vibration motor (14), wherein the top end of the vibration motor (14) is connected to the bottom end of the small-sized screening net (8).
5. A corn screening device as claimed in claim 4, characterized in that it further comprises a hopper (15), the output end of the hopper (15) being in communication with the inlet opening of the screening box (1).
6. The corn screening device as claimed in claim 5, characterized in that it further comprises a cleaning pipe (16), the side wall of the screening box (1) is provided with a second cleaning hole, said second cleaning hole is communicated with the cavity of the screening box (1), the second cleaning hole is arranged under the small-sized screening net (8), and the input end of the cleaning pipe (16) is communicated with the second cleaning hole of the screening box (1).
7. The corn screening device according to claim 6, further comprising four sets of casters (17), wherein the top ends of the four sets of casters (17) are connected to the bottom end of the screening box (1).
8. The corn screening device according to claim 7, characterized by further comprising four sets of air cylinders (18) and four sets of ground feet (19), wherein the side walls of the four sets of air cylinders (18) are connected with the side walls of the screening box (1), and the top ends of the four sets of ground feet (19) are respectively connected with the output ends of the four sets of air cylinders (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011290012.4A CN112387585A (en) | 2020-11-18 | 2020-11-18 | Corn screening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011290012.4A CN112387585A (en) | 2020-11-18 | 2020-11-18 | Corn screening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112387585A true CN112387585A (en) | 2021-02-23 |
Family
ID=74606396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011290012.4A Pending CN112387585A (en) | 2020-11-18 | 2020-11-18 | Corn screening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112387585A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113275243A (en) * | 2021-07-12 | 2021-08-20 | 诸城兴贸玉米开发有限公司 | Corn particle screening device with automatic cleaning function |
| CN115250760A (en) * | 2022-09-01 | 2022-11-01 | 江苏沃得农业机械股份有限公司 | Cleaning device for rice and wheat oil unmanned combine harvester |
-
2020
- 2020-11-18 CN CN202011290012.4A patent/CN112387585A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113275243A (en) * | 2021-07-12 | 2021-08-20 | 诸城兴贸玉米开发有限公司 | Corn particle screening device with automatic cleaning function |
| CN113275243B (en) * | 2021-07-12 | 2022-05-17 | 诸城兴贸玉米开发有限公司 | Corn particle screening device with automatic cleaning function |
| CN115250760A (en) * | 2022-09-01 | 2022-11-01 | 江苏沃得农业机械股份有限公司 | Cleaning device for rice and wheat oil unmanned combine harvester |
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