CN106179950A - A kind of electric assembling vibration type corn grading plant - Google Patents

A kind of electric assembling vibration type corn grading plant Download PDF

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Publication number
CN106179950A
CN106179950A CN201610574423.3A CN201610574423A CN106179950A CN 106179950 A CN106179950 A CN 106179950A CN 201610574423 A CN201610574423 A CN 201610574423A CN 106179950 A CN106179950 A CN 106179950A
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China
Prior art keywords
granary
crank
frequency conversion
spring
slideway
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CN201610574423.3A
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Chinese (zh)
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CN106179950B (en
Inventor
马学东
李亚运
于晓光
田旭
陈强
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University of Science and Technology Liaoning USTL
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University of Science and Technology Liaoning USTL
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING 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
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING 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
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B07B1/30Moving 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING 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
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens

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  • Combined Means For Separation Of Solids (AREA)

Abstract

A kind of electric assembling vibration type corn grading plant, is made up of rear end frequency conversion motor, rear end motor cabinet, power transmission shaft, spring slide bearing, universal rolling wheel, left connecting rod, rear crank, slide block, side link, lower end connection, base, right connecting rod, front end frequency conversion motor, front end motor cabinet, front crank, front rod, front connector, granary etc..The wherein composition such as rear crank, slide block, side link, lower end connection one oscillating guidebar mechanism.This mechanism passes through power transmission shaft, and under the driving of rear end frequency conversion motor, the pin joint around side link Yu lower end connection does reciprocal swing;Simultaneously by left connecting rod and right connecting rod, make granary around the center of circle, bottom surface of the hollow cylinder slideway on base top, do reciprocal yaw.It is high that the present invention has layering efficiency, and layering energy is big, stable, service life length feature.

Description

A kind of electric assembling vibration type corn grading plant
Technical field
The present invention relates to a kind of electric assembling vibration type corn grading plant, belong to a kind of corn and go deimpurity separation to fill Put.Can also be used for Chinese herbal medicine seed, grass seed and magazins' layout and graded operation.
Background technology
When ancient Chinese working people has utilized variable grain vibrations received and impact, granule will appear from segregation Corn is sieved with the principle of separating effect." generation language new statement " " outward dispersing winnowed with a dustpan, pityrosporum is front." the words the most well demonstrates this A bit.But traditional device fully relies on manpower, classification efficiency is poor, and labor intensity is big, it is impossible to adapt to present mechanization of agriculture Trend.
The present invention uses frequency conversion motor to be power source, the mode using combination vibration, and in simulating reality life, people use The process of sieve screening corn, reaches the effect of high-effective classifying corn.Bounce by spring slide bearing contained spring And the transmission of the parts such as universal rolling wheel, make granary can stablize at horizontal level when rear end frequency conversion motor stall.For passing Pass the moment of torsion of rear end frequency conversion motor and make rear end frequency conversion motor can be fixed when granary tandem vibrates, have employed One telescopic unitized drive shaft.
Retrieving according to pertinent literature, mode as characterized above, to utilize combination vibration is to realize the dress of corn classification Put and Patents is also not directed to.
Summary of the invention
It is an object of the invention to provide a kind of electric assembling vibration type corn grading plant, to strengthen grading effect, improve Classification efficiency, reduces the labor intensity of people.
Present invention is as follows:
A kind of electric assembling vibration type corn grading plant, by rear end frequency conversion motor, rear end motor cabinet, power transmission shaft, spring Sliding support, universal rolling wheel, left connecting rod, rear crank, slide block, side link, lower end connection, base, right connecting rod, front end variable-frequency electric Machine, front end motor cabinet, front crank, front rod, front connector, granary etc. form.Wherein rear crank, slide block, side link, lower end Composition one oscillating guidebar mechanism such as connector.This mechanism pass through power transmission shaft, under the driving of rear end frequency conversion motor, around side link with The pin joint of lower end connection does reciprocal swing;Make granary around the hollow cylinder on base top by left linkages simultaneously The center of circle, bottom surface of slideway, does reciprocal yaw.Composition one crank block such as front crank, front rod, front connector, granary Mechanism.Reciprocal horizontal linear vibration, under the driving of front end frequency conversion motor, is done by this mechanism.Circulation in both the above motion is driven Under Dong, promoting the corn in granary, grass stalk, sandstone is layered along gravity direction segregation.Rely on the pore being distributed in granary Screen out sandstone, rely on artificial removal top grass stalk after layering, discharge corn, complete classification.
Granary is inside and outside two-layer.Internal layer rotary strainer is hemispherical, and it provides the benefit that: 1, compared to cylinder or other shapes Corn sieve, the contact area of corn and compass screen surface can be increased;2, reduce the resistance that corn moves in rotary strainer, increase corn Layering energy.Pore and the hemispherical projections of 25 a diameter of 20mms of numerous a diameter of 2mm are distributed inside internal layer rotary strainer, its Provide the benefit that: hemispherical projections can improve the layering energy of corn by friction and collision.Outer layer rotary strainer is cylindrical, its Bottom is a network structure, and it provides the benefit that: 1, cylindrical outer sieve is easy on sieve nest weld slideway and connector;2, the end The network structure in portion can be discharged the fine sand fallen in internal layer rotary strainer outside storehouse.One each side it is distributed cancellated The disk of a diameter of 100mm, welds at a connector, the center of circle of the bolt hole on the two connector and the end below each disk The center of circle, the bottom surface three point on a straight line of the hollow cylinder slideway on seat.Make granary, base, left linkages and side link composition one Parallel-crank mechanism.It provides the benefit that: only makes above three center of circle conllinear, could pass through left linkages and swing guide Linkage, it is achieved yaw motion is done in the center of circle, bottom surface of granary hollow cylinder slideway on base.At outer layer rotary strainer The slideway that bottom welding one length is more smaller than rotary strainer diameter, the inner side of this slideway cross section is a circular arc, and arc angle is 200 °. It provides the benefit that: this slideway limits the left and right of granary and upper and lower movement and rotation front and back so that it is can only be the end of along Hollow cylinder slideway on seat do before and after move horizontally, and the center of circle, the bottom surface left-right rotation around hollow cylinder slideway. Positive front lower place, outer layer rotary strainer side is welded with half cirque slideway, and it provides the benefit that: it coordinates with front end connector, permissible Avoid the granary interference when side-to-side vibrations to front rod, and the front rod horizontal thrust to granary can be transmitted.
Power transmission shaft is combination type, is made up of surrounding jacket, internal rotating shaft and coil tension spring.Surrounding jacket one end has keyway The other end has spline, is separated by a circular baffle plate between two keyways.One end of internal rotating shaft be the spline other end be flat key, Between also have a circular baffle plate.Coil tension spring is arranged between two baffle plates.It provides the benefit that: 1, this axle both can transmit rear end The moment of torsion of frequency conversion motor can make again rear end frequency conversion motor be fixed when granary tandem vibrates, it is to avoid rear end change Frequently motor does reciprocal straight-line oscillation with granary, adds the service life of device;2, the spring on this power transmission shaft can have Effect alleviates impact when granary tandem vibrates to front end frequency conversion motor.
The base of spring slide bearing is a concave shape groove, respectively puts a spring in chassis interior both sides, puts one above spring Can slide up and down top board, and when top board is positioned at extreme higher position, spring is positioned at initial condition.It provides the benefit that: 1, can be effective Impact to rear end frequency conversion motor when alleviating granary yaw;2, by the bounce of spring slide bearing contained spring with And the transmission of the parts such as universal rolling wheel, make granary can stablize at horizontal level when rear end frequency conversion motor stall;3, in paddy During the vibration of thing storehouse tandem, granary playing the effect that auxiliary supports, make that mechanism runs is more steady.
In sum, it is high that the present invention has layering efficiency, and layering energy is big, stable, service life length feature.
Accompanying drawing explanation
Fig. 1 is electric assembling vibration type corn grading plant perspective view.
Fig. 2 is electric assembling vibration type corn grading plant longitudinal section perspective view.
Fig. 3 is power transmission shaft perspective view.
Fig. 4 is power transmission shaft longitudinal section perspective view.
Fig. 5 is spring slide bearing perspective view.
Fig. 6 is universal rolling wheel perspective view.
Fig. 7 is rear crank perspective view.
Fig. 8 is slide block perspective view.
Fig. 9 is side link perspective view.
Figure 10 is lower end connection perspective view.
Figure 11 is base perspective view.
Figure 12 is front connector perspective view.
Figure 13 is the internal perspective view of granary.
Figure 14 is granary external perspective structural representation.
Figure 15 is granary longitudinal section perspective view.
Detailed description of the invention
As shown in figures 1-15, a kind of electric assembling vibration type corn grading plant, by rear end frequency conversion motor 1, rear end motor Seat 2, power transmission shaft 3, spring slide bearing 4, universal rolling wheel 5, left connecting rod 6, rear crank 7, slide block 8, side link 9, lower end connection 10, base 11, right connecting rod 12, front end frequency conversion motor 13, front end motor cabinet 14, front crank 15, front rod 16, front connector 17, Granary 18 grade forms.The wherein composition such as rear crank 7, slide block 8, side link 9, lower end connection 10 oscillating guidebar mechanism.This Mechanism passes through power transmission shaft 3, and under the driving of rear end frequency conversion motor 1, the pin joint around side link 9 with lower end connection 10 does back and forth Swing;Simultaneously by left connecting rod 6 and right connecting rod 12, make granary 18 around the center of circle, bottom surface of base 11 upper cylindrical slideway, Do reciprocal yaw.Composition one slider-crank mechanism such as front crank 15, front rod 16, front connector 17, granary 18.This Reciprocal horizontal linear vibration, under the driving of front end frequency conversion motor 13, is done by mechanism.Under the circulation of both the above motion drives, Promoting the corn in granary 18, grass stalk, sandstone is layered along gravity direction segregation.Rely on and be distributed in the fine ga(u)ge screen in granary 18 Separate sandstone, rely on artificial removal top grass stalk after layering, discharge corn, complete classification.
Rear end motor cabinet 2 is fixed on ground, and rear end frequency conversion motor 1 is fixed by bolts on rear end motor cabinet 2.Power transmission shaft 3 rear ends are connected with rear end frequency conversion motor 1 by general flat key, and front end is connected with one end of split pin with rear crank 7 by flat key. Slide block 8 upper end and the other end of rear crank 7 are by loose bolted splice, and the lower end of slide block 8 is by the circular hole on slide block and side link 9 Formation is slidably connected.Side link 9 passes through loose bolted splice with the circular hole of lower end connection 10 at the circular hole of center;Side link 9 At the circular hole at two ends, hinged with the lower end circular hole of the left connecting rod 6 of both sides and right connecting rod 12 by pine bolt;Side link 9 liang At the rectangular block of side outermost end, fixed a universal rolling wheel 5 respectively by screw.The spin of universal rolling wheel 5 is propped up by spring slide The bounce of the spring in seat 4 and the top board of spring slide bearing 4 keep tangent, and can roll on this top board, and spring is sliding Dynamic bearing 4 is fixed on ground by foundation bolt.The upper end of left connecting rod 6 and right connecting rod 12 is by pine bolt and granary 18 end The connector of portion's welding is hinged.The upper end of lower end connection 10 and the underface being welded on base 11 top hollow cylinder slideway Rectangle slideway formed be slidably connected.Base 11 lower end is welded on ground, upper end and the slideway shape of granary 18 bottom welding One-tenth is slidably connected.The front end of granary 18 is half cirque slideway, and this slideway forms, with the slide plate of front connector 17, the company of slip Connect;The front end of this connector is hinged with the rear end of front rod 16 by pine bolt.Front crank 15 one end is by pine bolt and front company The front end of bar 16 is hinged, and its other end is connected with front end frequency conversion motor 13 by general flat key.Front end frequency conversion motor 13 uses bolt Being fixed on front motor seat 14, front motor seat 14 is fixed on ground.
The internal layer rotary strainer of granary 18 is hemispherical, compared to cylinder or other shapes corn sieve can increase corn with The contact area of compass screen surface reduces the resistance that corn moves in rotary strainer simultaneously.The pore of numerous a diameter of 2mm is distributed inside it With the hemispherical projections of 25 a diameter of 20mm, corn is more layered energy with hemispherical projections friction with colliding to obtain, It is beneficial to classification.Granary 18 outer layer rotary strainer is cylindrical, is a network structure bottom it.Cylindrical outer sieve is easy on sieve nest Welding slideway and connector, the network structure of bottom can be discharged the fine sand fallen in internal layer rotary strainer outside storehouse.At netted knot The disk that an a diameter of 100mm is each side distributed of structure, welds a connector below each disk, the two connects The center of circle, the bottom surface three point on a straight line of the hollow cylinder slideway on the center of circle of the bolt hole on part and base 11.Make granary 18, the end Seat 11, left connecting rod 6, right connecting rod 12 and side link 9 form a parallel-crank mechanism.Only make above three center of circle conllinear, Left linkages and oscillating guidebar mechanism could be passed through, it is achieved the bottom surface of the granary 18 hollow cylinder slideway on base 11 Yaw motion is done in the center of circle.At the slideway that outer layer rotary strainer bottom welding one length is more smaller than rotary strainer diameter, this slideway cross section Inner side be a circular arc, arc angle is 200 °.This slideway limits the left and right of granary 18 and upper and lower movement and front and back Rotation so that it is can only the hollow cylinder slideway along base 11 do before and after move horizontally, and sliding around hollow cylinder The center of circle, the bottom surface left-right rotation in road.Positive front lower place, outer layer rotary strainer side is welded with half cirque slideway, itself and front end connector 17 coordinate, and can avoid the granary 18 interference when side-to-side vibrations to front rod 16, and can transmit front rod 16 to paddy The horizontal thrust in thing storehouse 18.
Power transmission shaft 3 is combination type, is made up of surrounding jacket, internal rotating shaft and coil tension spring.Surrounding jacket one end has key The groove other end has spline, is separated by a circular baffle plate between two keyways.One end of internal rotating shaft be the spline other end be flat Key, between also have a circular baffle plate.Coil tension spring is arranged between two baffle plates.This axle both can transmit rear end frequency conversion motor 1 Moment of torsion can make again rear end frequency conversion motor 1 be fixed when granary 18 tandem vibrates, it is to avoid rear end frequency conversion motor 1 Do reciprocal straight-line oscillation with granary 18, add the service life of device.Spring on this power transmission shaft can effectively be alleviated Impact to front end frequency conversion motor 13 during the vibration of granary 18 tandem.
Spring slide bearing 4 base is a concave shape groove, respectively puts a spring in chassis interior both sides, and putting one above spring can The top board slided up and down, when top board is positioned at extreme higher position, spring is positioned at initial condition.If the paddy when rear end frequency conversion motor 1 stall Thing storehouse 18 is in obliquity, and spring slide bearing 4 can lean on the bounce of its internal spring, by portions such as universal rolling wheels 5 The transmission of part, makes granary 18 return to horizontal level, and when can effectively alleviate granary 18 yaw becomes rear end Frequently the impact of motor 1.When granary 18 tandem vibrates, granary 18 can be played the work that auxiliary supports by this device With, make that granary 18 runs when horizontal linear vibrates is more steady, improves layering efficiency.
The work process of the present invention: load corn to be fractionated from granary 18 top, connect main power, rear end variable-frequency electric Machine 1 starts.Under the driving of rear end frequency conversion motor 1, granary 18 is sliding around base 11 upper cylindrical by oscillating guidebar mechanism Reciprocal yaw is done in the center of circle, bottom surface in road.After arriving Preset Time, rear end frequency conversion motor 1 power-off, treat granary 18 When stopping vibration, front end frequency conversion motor 13 starts.Under the driving of front end frequency conversion motor 13, granary 18 is by crank block machine Structure cylindrical slideway along base 11 does reciprocal horizontal linear vibration.After arriving Preset Time, front end frequency conversion motor 13 power-off, when granary 18 stops vibration, rear end frequency conversion motor 1 is again started up, and circulates with this.Following of both the above motion Ring promotes the corn in granary 18, grass stalk under driving, sandstone is layered along gravity direction segregation.Dependence is distributed in granary 18 Fine ga(u)ge screen separate sandstone, rely on grass stalk in artificial removal top after layering, discharge corn, complete graded operation.

Claims (4)

1. an electric assembling vibration type corn grading plant, is slided by rear end frequency conversion motor, rear end motor cabinet, power transmission shaft, spring Dynamic bearing, universal rolling wheel, left connecting rod, rear crank, slide block, side link, lower end connection, base, right connecting rod, front end variable-frequency electric Machine, front end motor cabinet, front crank, front rod, front connector, granary etc. form.It is characterized in that the mode of vibration of this device For combination type, composition one oscillating guidebar mechanism such as described rear crank, slide block, side link, lower end connection, this mechanism is by passing Moving axis is under the driving of rear end frequency conversion motor, and the pin joint around side link Yu lower end connection does reciprocal swing, passes through simultaneously Left linkages makes granary around the center of circle, bottom surface of the hollow cylinder slideway on base top, does reciprocal yaw;Described Composition one slider-crank mechanism such as front crank, front rod, front connector, granary, this mechanism is in the driving of front end frequency conversion motor Under, do reciprocal horizontal linear vibration.
A kind of electric assembling vibration type corn grading plant the most according to claim 1, it is characterised in that: described corn Storehouse is inside and outside two-layer, and internal layer rotary strainer is hemispherical, and the pore of numerous a diameter of 2mm and 25 a diameter of 20mms are distributed inside it Hemispherical projections;Outer layer rotary strainer is cylindrical, is a network structure bottom it;Each side it is distributed cancellated The disk of one a diameter of 100mm, below each disk weld a connector, the center of circle of the bolt hole on the two connector with The center of circle, the bottom surface three point on a straight line of the hollow cylinder slideway on base, makes granary, base, left linkages and side link composition One parallel-crank mechanism;The slideway that a length is more smaller than rotary strainer diameter is welded in outer layer rotary strainer bottom, this slideway cross section Inner side is a circular arc, and arc angle is 200 °;The Zheng Qian lower end, side of outer layer rotary strainer is welded with half cirque slideway.
A kind of electric assembling vibration type corn grading plant the most according to claim 1, it is characterised in that: described transmission Axle is a telescopic unitized drive shaft, is made up of surrounding jacket, internal rotating shaft and coil tension spring;Surrounding jacket one end has The keyway other end has spline, is separated by a circular baffle plate between two keyways;One end of internal rotating shaft is that the spline other end is Flat key, between also have a circular baffle plate, coil tension spring is arranged between two baffle plates.
A kind of electric assembling vibration type corn grading plant the most according to claim 1, it is characterised in that: described spring The base of sliding support is a concave shape groove, respectively puts a spring in chassis interior both sides, puts one and can slide up and down above spring Top board, when top board is positioned at extreme higher position, spring is positioned at initial condition.
CN201610574423.3A 2016-07-19 2016-07-19 A kind of electric assembling oscillatory type cereal grading plant Active CN106179950B (en)

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CN106925511A (en) * 2017-05-16 2017-07-07 辽宁科技大学 Electric vertical straight-line oscillation type cereal grading plant
CN107185817A (en) * 2017-07-13 2017-09-22 辽宁科技大学 Electromagnetic assembled straight-line oscillation type hybrid particles sorting unit
CN107214090A (en) * 2017-05-12 2017-09-29 辽宁科技大学 The shimmy formula hybrid particles sorting unit of one kind combination and method for separating
CN108380498A (en) * 2018-05-09 2018-08-10 辽宁科技大学 Electronic compound shimmy device
CN108435577A (en) * 2018-05-09 2018-08-24 辽宁科技大学 Electric assembling moving particle separator
CN108435546A (en) * 2018-04-20 2018-08-24 青岛理工大学 A kind of reciprocating swing type ultrasonic wave high frequency shale shaker
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CN107214090A (en) * 2017-05-12 2017-09-29 辽宁科技大学 The shimmy formula hybrid particles sorting unit of one kind combination and method for separating
CN106925511A (en) * 2017-05-16 2017-07-07 辽宁科技大学 Electric vertical straight-line oscillation type cereal grading plant
CN107185817A (en) * 2017-07-13 2017-09-22 辽宁科技大学 Electromagnetic assembled straight-line oscillation type hybrid particles sorting unit
CN107185817B (en) * 2017-07-13 2023-01-13 辽宁科技大学 Electromagnetic combined linear vibration type mixed particle sorting device
CN108435546B (en) * 2018-04-20 2024-03-12 青岛理工大学 Reciprocating swing type ultrasonic high-frequency vibrating screen
CN108435546A (en) * 2018-04-20 2018-08-24 青岛理工大学 A kind of reciprocating swing type ultrasonic wave high frequency shale shaker
CN108515022B (en) * 2018-05-09 2023-09-19 辽宁科技大学 Combined vibration mixed particle layering device
CN108515022A (en) * 2018-05-09 2018-09-11 辽宁科技大学 Combination vibration hybrid particles decker
CN108465639A (en) * 2018-05-09 2018-08-31 辽宁科技大学 Motion biomimetics particle decker
CN108465639B (en) * 2018-05-09 2023-09-22 辽宁科技大学 Motion bionic particle layering device
CN108380498B (en) * 2018-05-09 2023-07-25 辽宁科技大学 Electric composite shimmy device
CN108435577B (en) * 2018-05-09 2023-09-12 辽宁科技大学 Electric combined motion particle separating device
CN108435577A (en) * 2018-05-09 2018-08-24 辽宁科技大学 Electric assembling moving particle separator
CN108380498A (en) * 2018-05-09 2018-08-10 辽宁科技大学 Electronic compound shimmy device
CN108554819A (en) * 2018-06-06 2018-09-21 辽宁科技大学 Aggregate motion particle sorting apparatus
CN108686952A (en) * 2018-06-06 2018-10-23 辽宁科技大学 Device for particle characteristics of motion research
CN108686952B (en) * 2018-06-06 2023-09-12 辽宁科技大学 Device for researching particle motion law
CN109883895B (en) * 2019-02-11 2023-09-05 辽宁科技大学 Mixed particle layering test device and method
CN109883895A (en) * 2019-02-11 2019-06-14 辽宁科技大学 A kind of hybrid particles layering experimental rig and method
US11559828B2 (en) 2020-02-07 2023-01-24 Chad M. Johnson Plant product extraction apparatus
CN111266292A (en) * 2020-03-20 2020-06-12 辽宁科技大学 Electromagnetic composite vibration type material layering device and using method thereof
CN112191509A (en) * 2020-10-14 2021-01-08 汤双琴 Highway is with basement stone screening installation
CN112791943A (en) * 2020-12-31 2021-05-14 泌阳亿健食品有限公司 Mushroom food processing impurity sieving mechanism
CN115350909A (en) * 2022-09-14 2022-11-18 徐斌 Controllable blanking anti-blocking multi-stage sand screening device
CN115350909B (en) * 2022-09-14 2023-10-10 东至安东昭潭机制砂生产有限公司 Multistage sand screening device capable of controlling blanking to prevent blockage

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