CN112007851A - Multistage ore screening device for mine - Google Patents
Multistage ore screening device for mine Download PDFInfo
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- CN112007851A CN112007851A CN202010836480.0A CN202010836480A CN112007851A CN 112007851 A CN112007851 A CN 112007851A CN 202010836480 A CN202010836480 A CN 202010836480A CN 112007851 A CN112007851 A CN 112007851A
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- Prior art keywords
- frame
- screening
- guide
- stage frame
- base
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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
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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
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
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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
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- 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
-
- 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
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses an ore multistage screening device for mines, which comprises a base, wherein the base is symmetrically arranged, a blanking channel is arranged between the base and the base, a guide plate is obliquely arranged in the blanking channel, a support is vertically and fixedly connected to the base, the top of the support is obliquely connected with a support frame, a plurality of guide rails are uniformly distributed on the support frame, the guide rails are matched and connected with guide wheels connected to the outer side of the screening frame, the outer side of one surface of the screening frame is fixedly connected with a guide groove of a linear swing mechanism, reinforcing rods are symmetrically connected to two sides of the guide groove, a blanking hopper is arranged above the front end of the screening frame, the blanking hopper is fixedly connected to the upper part of the front end of the; have compact structure, reasonable in design, the thinking is novel unique, drenches the ore surface through the nozzle water spray of feed opening, avoids the raise dust contaminated air, and reciprocal linear displacement about the drive screening frame of straight line swing mechanism realizes the screening, and overhead structure makes things convenient for the transport vechicle to stretch into conveniently receives the blanking, and the safety beam can prevent that the transport vechicle striking from damaging, and the screening frame realizes multi-stage screening.
Description
Technical Field
The invention relates to the technical field of ore separation screening machinery, in particular to an ore multistage screening device for a mine.
Background
Mine screening is the process of separating loose materials into different size fractions through a screen, and is called ore screening. In the concentrating mill, screening is mostly combined with the seed testing industry. The passing classification of which the granularity is qualified before the ore enters a certain section of a crusher is called pre-screening. The crushing device can prevent the excessive crushing of ores and improve the production efficiency of the crusher. After the ore is crushed by the powder crushing machine, the granularity of the crushed ore is measured by a screening gun, so that the unqualified and overlarge ore particles are returned to the crushing operation for crushing again, and the screening is called as inspection screening.
And a lot of bold ore still need follow heavy crushing and carry out screening once more after the screening, need add a large amount of manpower and materials through the turnover in the meantime, and the labour and force consuming consumes a lot of time, this is the problem that awaits a great deal of solution.
Disclosure of Invention
The invention aims to solve the existing problems and provides a mine ore multistage screening device which can complete screening operation of different grades by adopting multistage screening once without turnover.
The invention is realized by the following technical scheme: the utility model provides a multistage screening plant of ore for mine, which comprises a base, the base symmetry sets up, sets up the blanking passageway between them, the slope sets up the deflector in the blanking passageway, vertical rigid coupling support on the base, support top slope connection carriage, the equipartition sets up a plurality of guide rails on the carriage, the guide pulley of screening frame outside connection is connected in the guide rail cooperation, screening frame one side outside rigid coupling straight line swing mechanism's guide slot, guide slot bilateral symmetry connects the stiffener, the front end top of screening frame sets up the blanking fill, the blanking fill passes through the support body rigid coupling in the front end upper portion of base, the feed opening outside of blanking fill sets up the nozzle.
As a further improvement of the scheme, the support is set to be a structure with one side higher than the other side, and is fixedly connected with the support frame to form an inclined structure.
As a further improvement to the scheme, an overhead structure is arranged at the lower end of the inclined guide plate, an anti-collision safety beam is arranged on the vertical face of the overhead structure, and a transport vehicle is arranged in the overhead structure.
As a further improvement to the above scheme, the guide rail is provided with a guide wheel in a matching manner, the guide wheel is sleeved on a support shaft, and the support shaft is transversely connected to the bottom of the screening frame in a through manner.
As the further improvement to above-mentioned scheme, the screening frame include one-level frame, second grade frame and tertiary frame, the one-level frame set up in upper strata, second grade frame set up in intermediate level, tertiary frame and set up in the lower floor, be parallel to each other and be the slope form between one-level frame, second grade frame and tertiary frame, the low side of the slope form of one-level frame, second grade frame and tertiary frame inclines respectively and sets up blown down spout, well blown down spout and lower blown down spout, divide equally in one-level frame, second grade frame and the tertiary frame and do not pass through bolt releasable connection screen cloth.
As a further improvement to the above scheme, the linear oscillating mechanism includes a guide groove, the guide groove is vertically and fixedly connected to the middle of the outer side of one surface of the screening frame, a concave chute is vertically arranged in the outer side surface of the guide groove, one end of an oscillating rod is arranged in the chute through a bearing or a roller, the other end of the oscillating rod is connected with one end of an oscillating arm, the other end of the oscillating rod is connected with the outer end of a power arm through a pin shaft, the inner end of the oscillating rod is sleeved on an output shaft of a speed reducer, an input shaft of the speed reducer is connected with an output.
As a further improvement of the above scheme, after being conveyed and put into a blanking hopper, ores to be screened fall through a blanking port, and water sprayed out through a nozzle wets the surface of the ores, so that dust emission can be avoided, air pollution is reduced, air quality in a screening process is improved, and an operation environment is improved, after the ores fall onto a coarse screen of an upper primary frame in a screening frame, large blocks are filtered out through primary classification and discharged from an upper discharge chute (waste material), similarly, secondary large blocks in a secondary frame are discharged from a middle discharge chute (primary material), the ores screened by a screen in the secondary frame fall onto a fine screen in a tertiary frame, small blocks are screened out from a fine screen in the tertiary frame and discharged from the middle discharge chute (secondary material), and fine materials filtered by a fine screen in the tertiary frame fall onto a guide plate (tertiary material); the screen cloth and the screening frame are under the drive of rectilinear swinging mechanism, through the reciprocal linear displacement on the guide rail of the guide pulley installation outside the screening frame on the carriage, make and sieve the ore on the screen cloth and filter the classification, from the transport vechicle collection that the low side was stretched into in the overhead structure to the high-end landing on the deflector, set up crashproof safety beam in the overhead structure and can avoid the transport vechicle to stretch into the overhead structure in the speed too fast and hit down the founding wall under the external force drive, cause the damage of transport vechicle.
Compared with the prior art, the invention has the following advantages: have compact structure, reasonable in design, the thinking is novel unique, drenches through the nozzle water spray of feed opening to the ore surface, avoids the raise dust contaminated air, and reciprocal linear displacement about the drive screening frame of straight line swing mechanism realizes the screening, and screening frame multilayer structure realizes that multistage screening and the ejection of compact are thinner, the convenience of slagging tap, and overhead structure makes things convenient for the transport vechicle to stretch into, conveniently receives the thin material, and the safety beam can prevent the transport vechicle striking damage.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the screening frame in fig. 1.
Fig. 3 is a schematic view of an installation structure of the screen.
Fig. 4 is a schematic structural view of the linear oscillating mechanism.
Detailed Description
The invention will be further described with reference to the accompanying drawings, as shown in figures 1-4.
Example 1
The utility model provides a multistage screening plant of ore for mine, which comprises a base 1, 1 symmetry of base sets up, set up blanking passageway 2 during it, the slope sets up deflector 3 in blanking passageway 2, vertical rigid coupling support 4 on the base 1, support 4 top slope connection carriage 5, the equipartition sets up a plurality of guide rails 19 on the carriage 5, guide rail 19 cooperates and connects the guide pulley 20 of connecting 6 outside connections of screening frame, 6 one side outside rigid coupling linear oscillating mechanism 7's of screening frame guide slot 13, 13 bilateral symmetry of guide slot connect stiffener 14, screening frame 6's front end top sets up blanking fill 16, blanking fill 16 passes through 15 rigid couplings of support body in the front end upper portion of base 1, the feed opening 22 outside of blanking fill 16 sets up nozzle 23.
As a further improvement of the scheme, the bracket 4 is set to be a structure with one side higher and the other side lower, and is fixedly connected with the supporting frame 5 to form an inclined structure.
As a further improvement of the scheme, an overhead structure 17 is arranged at the lower end of the inclined guide plate 3, an anti-collision safety beam 18 is arranged on the vertical surface of the overhead structure 17, and a transport vehicle 27 is arranged in the overhead structure 17.
As a further improvement to the above scheme, the guide rail 19 is provided with a guide wheel 20 in a matching manner, the guide wheel 20 is sleeved on a support shaft 21, and the support shaft 21 is transversely connected to the bottom of the screening frame 6 in a full length manner.
As a further improvement to the above scheme, the screening frame 6 comprises a first-stage frame 63, a second-stage frame 62 and a third-stage frame 61, the first-stage frame 63 is arranged on the upper layer, the second-stage frame 62 is arranged on the middle layer, the third-stage frame 61 is arranged on the lower layer, the first-stage frame 63, the second-stage frame 62 and the third-stage frame 61 are parallel to each other and are inclined, the lower sides of the inclined shapes of the first-stage frame 63, the second-stage frame 62 and the third-stage frame 61 are respectively provided with an upper discharging groove 26, a middle discharging groove 25 and a lower discharging groove 29 in an inclined manner, and the first-stage frame 63, the second-stage frame 62 and the third-stage.
As a further improvement to the above scheme, the linear swing mechanism 7 includes a guide groove 13, the guide groove 13 is vertically and fixedly connected to the middle of the outer side of one surface of the screening frame 6, an inward concave chute is vertically arranged in the outer side surface of the guide groove 13, one end of a swing rod 12 is arranged in the chute through a bearing or a roller, the other end of the swing rod 12 is connected to one end of a swing arm 11, the other end of the swing rod is connected to the outer end of a power arm 10 through a pin shaft, the inner end of the swing arm is sleeved on an output shaft of the speed reducer 9, an input shaft of the speed reducer 9 is connected to an output shaft of.
As a further improvement of the above scheme, after the ore to be screened is conveyed and put into the blanking hopper 16, the ore falls through the blanking port 22, the water sprayed out through the nozzle 23 wets the surface of the ore, thereby avoiding the occurrence of dust emission, reducing the pollution to the air, improving the air quality in the screening process, improving the working environment, after the ore falls on the coarse screen of the upper primary frame 63 in the screening frame 6, the ore is primarily classified, the large blocks are filtered out and discharged from the upper discharge chute (waste material), similarly, the secondary large blocks in the secondary frame 62 are discharged from the middle discharge chute (primary material), the ore screened by the screen in the secondary frame 62 falls on the ultrafine screen in the tertiary frame 61, the small blocks are screened out from the ultrafine screen in the tertiary frame 61 and discharged from the discharge chute (secondary material), and the fine material filtered by the ultrafine screen in the tertiary frame 61 falls on the guide plate 3 (tertiary material); under the drive of rectilinear swinging mechanism 7, screen cloth and screening frame 6 through the reciprocal linear displacement on the guide rail 19 of the outer guide pulley 20 of screening frame 6 installation on carriage 5, impel to screen the ore on the screen cloth and filter hierarchical, from high-end landing to the low end on the deflector 3 through stretching into the transport vechicle 27 collection in the overhead structure 17, set up crashproof safety beam 18 in the overhead structure 17 and can avoid transport vechicle 27 to stretch into the overhead structure 17 under external force drive and too fast and hit down the founding wall, cause the damage of transport vechicle 27.
Example 2
The utility model provides a multistage screening plant of ore for mine, which comprises a base 1, 1 symmetry of base sets up, set up blanking passageway 2 during it, the slope sets up deflector 3 in blanking passageway 2, vertical rigid coupling support 4 on the base 1, support 4 top slope connection carriage 5, the equipartition sets up a plurality of guide rails 19 on the carriage 5, guide rail 19 cooperates and connects the guide pulley 20 of connecting 6 outside connections of screening frame, 6 one side outside rigid coupling linear oscillating mechanism 7's of screening frame guide slot 13, 13 bilateral symmetry of guide slot connect stiffener 14, screening frame 6's front end top sets up blanking fill 16, blanking fill 16 passes through 15 rigid couplings of support body in the front end upper portion of base 1, the feed opening 22 outside of blanking fill 16 sets up nozzle 23.
As a further improvement of the scheme, the bracket 4 is set to be a structure with one side higher and the other side lower, and is fixedly connected with the supporting frame 5 to form an inclined structure.
As a further improvement of the scheme, an overhead structure 17 is arranged at the lower end of the inclined guide plate 3, an anti-collision safety beam 18 is arranged on the vertical surface of the overhead structure 17, and a transport vehicle 27 is arranged in the overhead structure 17.
As a further improvement to the above scheme, the guide rail 19 is provided with a guide wheel 20 in a matching manner, the guide wheel 20 is sleeved on a support shaft 21, and the support shaft 21 is transversely connected to the bottom of the screening frame 6 in a full length manner.
As a further improvement to the above scheme, the screening frame 6 comprises a first-stage frame 63, a second-stage frame 62 and a third-stage frame 61, the first-stage frame 63 is arranged on the upper layer, the second-stage frame 62 is arranged on the middle layer, the third-stage frame 61 is arranged on the lower layer, the first-stage frame 63, the second-stage frame 62 and the third-stage frame 61 are parallel to each other and are inclined, the lower sides of the inclined shapes of the first-stage frame 63, the second-stage frame 62 and the third-stage frame 61 are respectively provided with an upper discharging groove 26, a middle discharging groove 25 and a lower discharging groove 29 in an inclined manner, and the first-stage frame 63, the second-stage frame 62 and the third-stage.
As a further improvement to the above scheme, the linear swing mechanism 7 includes a guide groove 13, the guide groove 13 is vertically and fixedly connected to the middle of the outer side of one surface of the screening frame 6, an inward concave chute is vertically arranged in the outer side surface of the guide groove 13, one end of a swing rod 12 is arranged in the chute through a bearing or a roller, the other end of the swing rod 12 is connected to one end of a swing arm 11, the other end of the swing rod is connected to the outer end of a power arm 10 through a pin shaft, the inner end of the swing arm is sleeved on an output shaft of the speed reducer 9, an input shaft of the speed reducer 9 is connected to an output shaft of.
As a further improvement to the above scheme, a coarse screen is arranged in the first-stage frame 63.
As a further improvement to the above scheme, a fine screen is arranged in the secondary frame 62.
As a further improvement to the above, a fine mesh is provided in the third-stage frame 61.
As a further improvement of the above scheme, after the ore to be screened is conveyed and put into the blanking hopper 16, the ore falls through the blanking port 22, the water sprayed out through the nozzle 23 wets the surface of the ore, thereby avoiding the occurrence of dust emission, reducing the pollution to the air, improving the air quality in the screening process, improving the working environment, after the ore falls on the coarse screen of the upper primary frame 63 in the screening frame 6, the ore is primarily classified, the large blocks are filtered out and discharged from the upper discharge chute (waste material), similarly, the secondary large blocks in the secondary frame 62 are discharged from the middle discharge chute (primary material), the ore screened by the screen in the secondary frame 62 falls on the ultrafine screen in the tertiary frame 61, the small blocks are screened out from the ultrafine screen in the tertiary frame 61 and discharged from the discharge chute (secondary material), and the fine material filtered by the ultrafine screen in the tertiary frame 61 falls on the guide plate 3 (tertiary material); under the drive of rectilinear swinging mechanism 7, screen cloth and screening frame 6 through the reciprocal linear displacement on the guide rail 19 of the outer guide pulley 20 of screening frame 6 installation on carriage 5, impel to screen the ore on the screen cloth and filter hierarchical, from high-end landing to the low end on the deflector 3 through stretching into the transport vechicle 27 collection in the overhead structure 17, set up crashproof safety beam 18 in the overhead structure 17 and can avoid transport vechicle 27 to stretch into the overhead structure 17 under external force drive and too fast and hit down the founding wall, cause the damage of transport vechicle 27.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a multistage screening plant of ore for mine, which comprises a base and is characterized in that, the base symmetry sets up the blanking passageway between, the slope sets up the deflector in the blanking passageway, vertical rigid coupling support on the base, support top slope connection carriage, the equipartition sets up a plurality of guide rails on the carriage, the guide pulley that the screening frame outside is connected in the guide rail cooperation, screening frame one side outside rigid coupling sharp swing mechanism's guide slot, the guide slot bilateral symmetry connects the stiffener, set up the blanking fill on the front end top of screening frame, the blanking fill passes through support body rigid coupling in the front end upper portion of base, the feed opening outside of blanking fill sets up the nozzle.
2. A multistage ore screening apparatus as claimed in claim 1, wherein the support is configured to have a height from one side to the other and is secured to a support frame to form an inclined structure.
3. The multistage ore screening device for mines as claimed in claim 1, wherein an overhead structure is arranged at the lower end of the inclined guide plate, an anti-collision safety beam is arranged on the vertical surface of the overhead structure, and a transport vehicle is arranged in the overhead structure.
4. The multistage ore screening device for mines as claimed in claim 1, wherein the guide rail is provided with a guide wheel in a matching manner, the guide wheel is sleeved on a support shaft, and the support shaft is connected to the bottom of the screening frame in a transverse through manner.
5. The multistage ore screening device for mines according to claim 1, wherein the screening frame comprises a first-stage frame, a second-stage frame and a third-stage frame, the first-stage frame is arranged on an upper layer, the second-stage frame is arranged on a middle layer, and the third-stage frame is arranged on a lower layer, the first-stage frame, the second-stage frame and the third-stage frame are parallel to each other and are inclined, the lower sides of the inclined shapes of the first-stage frame, the second-stage frame and the third-stage frame are respectively provided with an upper discharging groove, a middle discharging groove and a lower discharging groove in an inclined mode, and the first-stage frame, the second-stage frame and the third-stage frame.
6. The multistage ore screening device for the mine, according to claim 1, wherein the linear swing mechanism comprises a guide groove, the guide groove is vertically and fixedly connected to the middle of the outer side of one surface of the screening frame, an inward concave type sliding groove is vertically formed in the outer side surface of the guide groove, one end of a swing rod is arranged in the sliding groove through a bearing or a roller, the other end of the swing rod is connected with one end of a swing arm, the other end of the swing rod is connected with the outer end of a power arm through a pin shaft, the inner end of the swing rod is sleeved on an output shaft of a speed reducer, an input shaft of the speed reducer is connected with an output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010836480.0A CN112007851A (en) | 2020-08-19 | 2020-08-19 | Multistage ore screening device for mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010836480.0A CN112007851A (en) | 2020-08-19 | 2020-08-19 | Multistage ore screening device for mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112007851A true CN112007851A (en) | 2020-12-01 |
Family
ID=73505120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010836480.0A Withdrawn CN112007851A (en) | 2020-08-19 | 2020-08-19 | Multistage ore screening device for mine |
Country Status (1)
| Country | Link |
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| CN (1) | CN112007851A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113477297A (en) * | 2021-06-23 | 2021-10-08 | 张晔 | Feeding mechanism of rice polishing machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205550830U (en) * | 2016-05-09 | 2016-09-07 | 青岛科技大学 | Ground is experimental with crank rocker -type screening machine |
| CN205966477U (en) * | 2016-08-16 | 2017-02-22 | 王松元 | Mining quarrying screening plant |
| CN107020194A (en) * | 2017-05-29 | 2017-08-08 | 肇庆市思睿力机器人科技有限公司 | It is a kind of to improve the low ore pulverizer of strong applicability power consumption |
| CN107029987A (en) * | 2017-04-26 | 2017-08-11 | 新乡市振英机械设备有限公司 | A kind of multilayer closed vibration sieve |
| CN107971067A (en) * | 2017-12-03 | 2018-05-01 | 青岛联合智造科技有限公司 | A kind of crush wraps up in mud ore crusher easy to feeding with what is screened |
-
2020
- 2020-08-19 CN CN202010836480.0A patent/CN112007851A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205550830U (en) * | 2016-05-09 | 2016-09-07 | 青岛科技大学 | Ground is experimental with crank rocker -type screening machine |
| CN205966477U (en) * | 2016-08-16 | 2017-02-22 | 王松元 | Mining quarrying screening plant |
| CN107029987A (en) * | 2017-04-26 | 2017-08-11 | 新乡市振英机械设备有限公司 | A kind of multilayer closed vibration sieve |
| CN107020194A (en) * | 2017-05-29 | 2017-08-08 | 肇庆市思睿力机器人科技有限公司 | It is a kind of to improve the low ore pulverizer of strong applicability power consumption |
| CN107971067A (en) * | 2017-12-03 | 2018-05-01 | 青岛联合智造科技有限公司 | A kind of crush wraps up in mud ore crusher easy to feeding with what is screened |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113477297A (en) * | 2021-06-23 | 2021-10-08 | 张晔 | Feeding mechanism of rice polishing machine |
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Application publication date: 20201201 |