CN110918454B - A material screening device - Google Patents
A material screening device Download PDFInfo
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- CN110918454B CN110918454B CN201911116728.XA CN201911116728A CN110918454B CN 110918454 B CN110918454 B CN 110918454B CN 201911116728 A CN201911116728 A CN 201911116728A CN 110918454 B CN110918454 B CN 110918454B
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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
- B07B1/34—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro perpendicularly or approximately perpendiculary to the plane of the screen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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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
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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
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
本发明公开了一种物料筛分装置，包括第一支撑板，第一支撑板的顶端一侧固定有第二支撑板，第二支撑板远离第一支撑板的一端固定有第三支撑板，且第一支撑板和第三支撑板之间平行设置，第一支撑板的顶端一侧固定有旋转电机，旋转电机的输出轴通过穿过第三支撑板固定有圆形结构的进料箱。本发明能够对进料箱进行旋转，完成间歇式进料，防止一下进料过多，容易造成堵塞，同时，能够通过一个驱动源，能够进行搅动除尘以及间歇式进料，提高了实用性，能够对物料进行抖动筛分，进行分开收集，提高了便捷性，能够对收集的物料进行逐一落入收集袋内进行包装，提高了实用性，本发明中的各种机械传动均通过一个驱动源实现，设备成本低。
The invention discloses a material screening device, comprising a first support plate, a second support plate is fixed on the top side of the first support plate, and a third support plate is fixed at the end of the second support plate away from the first support plate, The first support plate and the third support plate are arranged in parallel, the top side of the first support plate is fixed with a rotating motor, and the output shaft of the rotating motor is fixed with a circular structure feed box through the third support plate. The invention can rotate the feeding box to complete intermittent feeding, prevent excessive feeding at one time, which is easy to cause blockage, and at the same time, can carry out agitation and dust removal and intermittent feeding through a driving source, which improves the practicability. The material can be shaken and screened and collected separately, which improves the convenience. The collected materials can be dropped into the collection bag for packaging one by one, which improves the practicability. Various mechanical transmissions in the present invention all pass through a driving source. Realization, low equipment cost.
Description
Technical Field
The invention relates to the technical field of material screening, in particular to a material screening device.
Background
When current material screening plant was sieving, traditional screening plant generally was trembled the screening and was sieved and remove dust, all need operate through a plurality of driving sources, and production is higher, and simultaneously, carries out ejection of compact packing after the screening comparatively troublesome, can't stabilize quick ejection of compact packing, has reduced the practicality, for this reason we have proposed a material screening plant.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a material screening device.
In order to achieve the purpose, the invention adopts the following technical scheme:
a material screening device comprises a first supporting plate, wherein a second supporting plate is fixed on one side of the top end of the first supporting plate, a third supporting plate is fixed on one end, far away from the first supporting plate, of the second supporting plate, the first supporting plate and the third supporting plate are arranged in parallel, a rotating motor is fixed on one side of the top end of the first supporting plate, an output shaft of the rotating motor penetrates through the third supporting plate and is fixed with a feeding box of a circular structure, a feeding hole is formed in the top end of the feeding box, a discharging hole is formed in the middle of the side wall of the bottom end of the feeding box, a processing box is arranged on one side of the third supporting plate, a driven shaft is rotatably connected to the inner wall of the top end of the processing box, a first gear is fixed to the outer portion of the driven shaft in a manner, the other end of the first connecting shaft extends to the interior of the dust removal box and is fixedly provided with a fan blade, the outer side wall of the first connecting shaft is in tight fit and is sleeved with a first worm, the outer side wall of the output shaft is in tight fit and is sleeved with a first worm wheel, the first worm wheel and the first worm are in threaded transmission, the outer side wall of the feeding box is provided with a rack, the rack is in meshed transmission with the first worm, the top end of the first supporting plate is fixedly provided with a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are arranged in parallel, one side wall of the first connecting plate, which is close to the second connecting plate, is provided with a first groove, one side wall of the first groove is slidably connected with a sliding block with an arc structure, one side wall of the sliding block is fixedly provided with a screening mechanism, the top side wall of the sliding block is provided with a reset spring, one end of the second connecting shaft extends to the inside cam that is fixed with of first recess, the below of screening mechanism is installed and is gone out the hopper fixed with first connecting plate, second connecting plate, and the below that goes out the hopper is provided with the round platform, and the round platform positive center is fixed with the pivot, one side lateral wall that the second connecting plate is close to the round platform is fixed with the limiting plate that the symmetry set up, and the pivot is kept away from the one end of round platform and is rotated with the limiting plate and be connected.
Preferably, the outer circumferential side wall of the circular truncated cone is provided with a plurality of material receiving grooves along the outer circumferential direction, one side of the circular truncated cone is provided with a baffle plate of an arc structure fixed with the first connecting plate, and one end of the baffle plate close to the material discharging hopper is fixedly provided with a scraper.
Preferably, a transmission shaft is rotatably connected between the first supporting plate and the third supporting plate, a second gear is sleeved on the outer side wall of the transmission shaft in a tight fit mode, the second gear and the rack are in meshed transmission, a third connecting shaft is rotatably connected to the side wall of one side of the second supporting plate, and the third connecting shaft is located below the second connecting shaft.
Preferably, the outer side walls of the second connecting shaft and the third connecting shaft are tightly matched and sleeved with second worms, the outer side wall of the transmission shaft is tightly matched and sleeved with two second worm gears, and the second worms are in threaded transmission fit with the second worm gears.
Preferably, a third worm wheel is sleeved on the outer side wall of the rotating shaft in a tight fit manner, a third worm is fixed at one end, far away from the second supporting plate, of the third connecting shaft, and the third worm wheel is in threaded transmission fit with the third worm.
Preferably, a bag fixing frame fixed at the top end of the first supporting plate is installed below the baffle, and a collecting bag is placed in the bag fixing frame.
Preferably, screening mechanism includes the bottom plate, has seted up the through-hole on the bottom plate, and the through-hole internal fixation has the screen cloth, the both sides lateral wall of bottom plate is fixed with the first fixed plate that the symmetry set up, and the one end of bottom plate is fixed with the second fixed plate, and sets up perpendicularly between first fixed plate and the second fixed plate.
Preferably, one end of the screening mechanism, which is far away from the sliding block, is fixed with elastic cloth, the other end of the elastic cloth is fixed with a second connecting plate, a discharge hole is formed in the second connecting plate, and a collecting box is fixed on the second connecting plate, which is far away from the first connecting plate.
Compared with the prior art, the invention has the beneficial effects that:
1: through the matching among the driven shaft, the first supporting plate, the second supporting plate, the third supporting plate, the stirring plate, the fan blades, the first connecting shaft and the feeding box, the feeding box can be rotated, intermittent feeding is completed, the phenomenon that the feeding is too much and blocking is easily caused is prevented, meanwhile, stirring dust removal and intermittent feeding can be performed through one driving source, and the practicability is improved;
2: through the matching of the screening mechanism, the sliding block, the cam, the reset spring, the second connecting shaft and the elastic cloth, materials can be shaken and screened and separately collected, so that the convenience is improved;
3: through the matching among the round platform, the receiving groove, the bag fixing frame, the baffle, the scraper, the limiting plate, the rotating shaft, the third worm wheel, the third worm and the third connecting shaft, the collected materials can fall into the collecting bag one by one for packaging, so that the practicability is improved;
the material feeding box can rotate to complete intermittent feeding, so that the phenomenon that the material is fed too much at one time and is easily blocked is avoided, meanwhile, stirring dust removal and intermittent feeding can be performed through one driving source, the practicability is improved, the materials can be shaken and screened and separately collected, the convenience is improved, the collected materials can fall into the collecting bag one by one to be packaged, the practicability is improved, various mechanical transmissions are realized through one driving source, and the equipment cost is low.
Drawings
Fig. 1 is a schematic structural diagram of a material screening device according to the present invention.
Fig. 2 is an enlarged schematic structural diagram of a part a of a material screening device provided by the invention.
Fig. 3 is an enlarged schematic structural diagram of a part B of a material screening device according to the present invention.
Fig. 4 is a schematic structural diagram of a screening mechanism of a material screening device according to the present invention.
Fig. 5 is a schematic view of a first worm wheel and a first worm of the material sieving device according to the present invention.
In the figure: 1 first supporting plate, 2 second supporting plate, 3 third supporting plate, 4 bags of fixing belts, 5 rotating motors, 6 output shafts, 7 feeding boxes, 8 feeding holes, 9 processing boxes, 10 driven shafts, 11 first gears, 12 second connecting plates, 13 stirring plates, 14 feeding pipes, 15 dust removing boxes, 16 first connecting shafts, 17 fan blades, 18 filter screens, 19 first worm wheels, 20 first connecting plates, 21 limiting plates, 22 round tables, 23 transmission shafts, 24 second gears, 25 second connecting shafts, 26 second worm wheels, 27 second worms, 28 sliders, 29 return springs, 30 cams, 31 screening mechanisms, 3101 screens, 3102 first fixing plates, 3103 second fixing plates, 32 rotating shafts, 33 material receiving grooves, 34 baffle plates, 35 scraping plates, 36 third connecting shafts, 37 second worm wheels, 38 third worm wheels, 39 third worm wheels, 40 collecting boxes, 41 material discharging hoppers and 42 first worm wheels.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, a material screening device comprises a first supporting plate 1, a second supporting plate 2 is fixed on one side of the top end of the first supporting plate 1, a third supporting plate 3 is fixed on one end of the second supporting plate 2 far away from the first supporting plate 1, the first supporting plate 1 and the third supporting plate 3 are arranged in parallel, a rotating motor 5 is fixed on one side of the top end of the first supporting plate 1, a feeding box 7 with a circular structure is fixed on an output shaft 6 of the rotating motor 5 by penetrating through the third supporting plate 3, a feeding port 8 is arranged at the top end of the feeding box 7, a discharging port is arranged in the middle of the bottom end side wall of the feeding box 7, a processing box 9 is arranged on one side of the third supporting plate 3, a driven shaft 10 is rotatably connected to the inner wall of the top end of the processing box 9, a first gear 11 is fixed at one end of the driven shaft 10 and extends to, a dust removal box 15 is fixed on the outer wall of one side of the treatment box 9, a first connecting shaft 16 is rotatably connected to the side wall of one side of the second support plate 2, a fan blade 18 is fixed on the other end of the first connecting shaft 16 extending into the dust removal box 15, a first worm 19 is sleeved on the outer side wall of the first connecting shaft 16 in a tight fit manner, a first worm wheel 42 is sleeved on the outer side wall of the output shaft 6 in a tight fit manner, the first worm wheel 42 and the first worm 19 are in threaded transmission, a rack is arranged on the outer side wall of the feed box 7 and is in meshed transmission with the first gear 11, a first connecting plate 20 and a second connecting plate 12 are fixed at the top end of the first support plate 1, the first connecting plate 20 and the second connecting plate 12 are arranged in parallel, a first groove 27 is arranged on the side wall of one side of the first connecting plate 20 close to the second connecting plate 12, a slide block 28 with an arc structure is slidably connected to the, the top end side wall of the sliding block 28 is provided with a return spring 29 fixed with the side wall of the first groove 27, one side wall of the second supporting plate 2 is rotatably connected with a second connecting shaft 28, one end of the second connecting shaft 28 extends to the inside of the first groove 27 and is fixed with a cam 30, a discharge hopper 41 fixed with the first connecting plate 20 and the second connecting plate 12 is installed below the screening mechanism 31, a circular truncated cone 22 is arranged below the discharge hopper 41, the center of the circular truncated cone 22 is fixedly provided with a rotating shaft 32, one side wall of the second connecting plate 12 close to the circular truncated cone 22 is fixedly provided with limiting plates 21 symmetrically arranged, and one end of the rotating shaft 32 far away from the circular truncated cone 22 is rotatably connected with the.
The outer circumferential side wall of the circular table 22 is provided with a plurality of material receiving grooves 33 along the outer circumferential direction, one side of the circular table 22 is provided with a baffle 34 with an arc structure fixed with the first connecting plate 20, one end of the baffle 34 close to the discharge hopper 41 is fixed with a scraper 35, a transmission shaft 23 is rotatably connected between the first supporting plate 1 and the third supporting plate 3, the outer side wall of the transmission shaft 23 is tightly matched and sleeved with the second gear 24, the second gear 24 is in meshing transmission with the rack, the side wall of one side of the second supporting plate 2 is rotatably connected with a third connecting shaft 36, the third connecting shaft 36 is positioned below the second connecting shaft 25, the outer side walls of the second connecting shaft 25 and the third connecting shaft 36 are tightly matched and sleeved with the second worm 26, the outer side wall of the transmission shaft 23 is tightly matched and sleeved with two second worm gears, the second worm 26 is in threaded transmission matching with the second worm gears, and the outer side wall of, a third worm 38 is fixed at one end of the third connecting shaft 36 far away from the second supporting plate 2, the third worm wheel 39 is in threaded transmission fit with the third worm 38, a bag fixing frame 4 fixed to the top end of the first supporting plate 1 is installed below the baffle 34, a collecting bag is placed in the bag fixing frame 4, the screening mechanism 31 comprises a bottom plate, a through hole is formed in the bottom plate, a screen 3101 is fixed in the through hole, first fixing plates 3102 symmetrically arranged are fixed to side walls on two sides of the bottom plate, a second fixing plate 3103 is fixed to one end of the bottom plate, a collecting box 40 is fixed between the first fixing plate 3102 and the second fixing plate 3103, elastic cloth is fixed to one end, far away from the sliding block 28, of the screening mechanism 31, the other end of the elastic cloth is fixed to the second connecting plate 12, a discharge hole is formed in the second connecting plate 12, and a collecting box 40.
The bin outlet has been seted up to bottom one side of handling case 9, and the diameter of bin outlet equals with the 8 diameter size of feed inlet, and simultaneously, the passageway has been seted up to one side lateral wall of handling case 9, and the passageway communicates with dust removal 15 inside, and the passageway is inside to be fixed with filter screen 18, and the top of handling case 9 is provided with inlet pipe 14, be connected with the gusset plate between handling case 9 and the third backup pad 3.
The working principle is as follows: pouring the material into a processing box 9, starting a rotating motor 5, wherein the rotating motor 5 drives an output shaft 6 to rotate, the output shaft 6 drives a feeding box 7 to rotate, the feeding box 7 drives a rack arranged on the outer side wall to rotate, the rack is meshed with a first gear 11 to drive a driven shaft 10 to rotate, the driven shaft 10 drives a stirring plate 13 to rotate, the stirring plate 13 stirs the material, so that dust in the material is separated from the material, meanwhile, the output shaft 6 drives a first worm wheel 42 to rotate, the first worm wheel 42 is matched with a first worm 19 to drive a first connecting shaft 16 to rotate, the first connecting shaft 16 drives a fan blade 17 to rotate to absorb dust, when a feeding port 8 of the feeding box 7 is communicated with a discharging port, the material falls into the feeding box 7 and falls onto a screening mechanism 31 from the discharging port, and simultaneously, the rack is meshed with a second gear 24 to drive a transmission shaft 23 to rotate, the transmission shaft 23 drives the second worm wheel to rotate, the second worm wheel and the second worm 26 are in threaded transmission to drive the second connecting shaft 25 and the third connecting shaft 36 to rotate, the second connecting shaft 25 drives the cam 30 to rotate, the cam 30 extrudes the arc-shaped surface of the sliding block 28 to enable the sliding block 28 to drive the screening mechanism 31 to move upwards, when the cam 30 does not extrude the sliding block 28 any more, under the elastic force of the return spring 29, the sliding block 28 drives one end of the screening mechanism 31 to move downwards to form vertical rapid shaking screening, screened materials fall into the discharging hopper 41 and fall into the receiving groove 33 from the discharging hopper 41, due to the rotation of the third connecting shaft 36, the third connecting shaft 36 drives the third worm 38, the third worm 38 and the third worm wheel 39 are in threaded transmission to drive the rotating shaft 32 to rotate, the rotating shaft 32 drives the circular table 22 to rotate, the receiving groove 33 filled with the materials moves downwards, and the receiving groove 33 enters the baffle 34 area, when the material receiving groove 33 is rotated out of the area of the baffle 34, materials in the material receiving groove 33 fall into a collecting bag below to be collected, the design is simple and rapid, the feeding box can be rotated, intermittent feeding is completed, excessive feeding is prevented, blocking is easily caused, meanwhile, stirring dust removal and intermittent feeding can be performed through one driving source, the practicability is improved, the materials can be shaken and screened and are separately collected, the convenience is improved, the collected materials can be packed in the collecting bag one by one, the practicability is improved, various mechanical transmissions are realized through one driving source, and the equipment cost is low.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A material screening device comprises a first supporting plate and is characterized in that a second supporting plate is fixed on one side of the top end of the first supporting plate, a third supporting plate is fixed on one end, far away from the first supporting plate, of the second supporting plate, a rotating motor is fixed on one side of the top end of the first supporting plate, a feeding box of a circular structure is fixed on the output shaft of the rotating motor through the third supporting plate, a feeding hole is formed in the top end of the feeding box, a discharging hole is formed in the middle of the bottom end side wall of the feeding box, a processing box is arranged on one side of the third supporting plate, a driven shaft is rotatably connected to the inner wall of the top end of the processing box, a first gear is fixed outside the processing box in a extending mode, symmetrically arranged stirring plates are fixed on the outer side wall of the driven shaft, a dust removing box is fixed on the outer wall of one side of the, the dust removing box is characterized in that a first connecting shaft is rotatably connected to one side wall of the second supporting plate, the other end of the first connecting shaft extends to the inside of the dust removing box and is fixedly provided with a fan blade, a first worm is sleeved on the outer side wall of the first connecting shaft in a tight fit manner, a first worm wheel is sleeved on the outer side wall of the output shaft in a tight fit manner, the first worm wheel and the first worm are in threaded transmission, a rack is arranged on the outer side wall of the feeding box and is in meshed transmission with the first worm wheel, a first connecting plate and a second connecting plate are fixed at the top end of the first supporting plate and are arranged in parallel, a first groove is arranged on one side wall of the first connecting plate, the side wall of the first groove is in sliding connection with a sliding block with an arc structure, a screening mechanism is fixed on one side wall of the sliding block, and a reset spring fixed with the first groove side wall, one side lateral wall of second backup pad rotates and is connected with the second connecting axle, and the one end of second connecting axle extends to the inside cam that is fixed with of first recess, screening mechanism's below is installed and is gone out the hopper fixed with first connecting plate, second connecting plate, and the below that goes out the hopper is provided with the round platform, and the round platform positive center is fixed with the pivot, one side lateral wall that the second connecting plate is close to the round platform is fixed with the limiting plate that the symmetry set up, and the pivot is kept away from the one end of round platform and is rotated with the limiting plate and be connected.
2. The material screening device of claim 1, wherein a plurality of material receiving grooves are formed in the outer circumferential side wall of the circular truncated cone along the outer circumferential direction of the circular truncated cone, a baffle plate of an arc structure fixed with the first connecting plate is installed on one side of the circular truncated cone, and a scraper is fixed at one end, close to the material discharging hopper, of the baffle plate.
3. The material screening device of claim 1, wherein a transmission shaft is rotatably connected between the first support plate and the third support plate, a second gear is sleeved on the outer side wall of the transmission shaft in a tight fit manner, the second gear and the rack are in meshed transmission, a third connecting shaft is rotatably connected to the side wall of one side of the second support plate, and the third connecting shaft is located below the second connecting shaft.
4. The material screening device of claim 3, wherein the second worm is sleeved on the outer side wall of each of the second connecting shaft and the third connecting shaft in a tight fit manner, the two second worm wheels are sleeved on the outer side wall of the transmission shaft in a tight fit manner, and the second worm wheels are in threaded transmission fit.
5. The material screening device of claim 3, wherein a third worm gear is sleeved on the outer side wall of the rotating shaft in a tight fit manner, a third worm is fixed to one end, far away from the second supporting plate, of the third connecting shaft, and the third worm gear is in threaded transmission fit with the third worm.
6. A material screening apparatus as claimed in claim 2, wherein a bag holder is mounted below the baffle plate and secured to the top of the first support plate, and a collection bag is received in the bag holder.
7. The material screening device of claim 1, wherein the screening mechanism comprises a bottom plate, through holes are formed in the bottom plate, the screen mesh is fixed in the through holes, first fixing plates are symmetrically arranged on two side walls of the bottom plate, a second fixing plate is fixed at one end of the bottom plate, and the first fixing plate and the second fixing plate are vertically arranged.
8. The material screening device of claim 1, wherein an elastic cloth is fixed to one end of the screening mechanism, which is far away from the sliding block, and the other end of the elastic cloth is fixed to a second connecting plate, a discharge hole is formed in the second connecting plate, and a collecting box is fixed to the second connecting plate, which is far away from the first connecting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911116728.XA CN110918454B (en) | 2019-11-15 | 2019-11-15 | A material screening device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911116728.XA CN110918454B (en) | 2019-11-15 | 2019-11-15 | A material screening device |
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| CN110918454A CN110918454A (en) | 2020-03-27 |
| CN110918454B true CN110918454B (en) | 2021-05-28 |
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