CN110586460B - Underground large raw coal screening device - Google Patents
Underground large raw coal screening device Download PDFInfo
- Publication number
- CN110586460B CN110586460B CN201910879537.2A CN201910879537A CN110586460B CN 110586460 B CN110586460 B CN 110586460B CN 201910879537 A CN201910879537 A CN 201910879537A CN 110586460 B CN110586460 B CN 110586460B
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- plate
- raw coal
- screening device
- sieve
- coal screening
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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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
-
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
Abstract
The invention discloses an underground large-scale raw coal screening device, which belongs to the technical field of coal mine equipment and is arranged at the output side of a raw coal conveyor belt. The underground large-scale raw coal screening device can screen the raw coal surface or coal particles with smaller particle sizes in the raw coal to directly enter the coal bunker, greatly reduces the treatment capacity of a crusher, and improves the production efficiency.
Description
Technical Field
The invention relates to the technical field of coal mine equipment, in particular to an underground large-scale raw coal screening device.
Background
With the continuous development of social economy and science and technology, mine resources are still important pillars for the development of modern social economy and science and technology. At present, the raw coal is mostly mined from a mining surface in a coal mine, then the raw coal is conveyed by a belt conveyor and then enters a crusher to be crushed and then enters a coal bunker, but the mining amount of the raw coal is limited by the processing capacity of the crusher when the mining amount of the raw coal is too large, so that the mining amount of the raw coal can be influenced. Meanwhile, as the raw coal with smaller granularity or coal particles also exist in the raw coal, the crusher can block the bin or be damaged, and then the whole raw coal mining production line is stopped, so that the production efficiency is greatly reduced, and the coal mine benefit is reduced.
Therefore, it is necessary to develop a new downhole large-sized raw coal screening device to screen out the raw coal surface or coal particles with smaller particle size in the raw coal to improve the production efficiency.
Disclosure of Invention
The invention aims to provide an underground large-scale raw coal screening device which can screen raw coal surfaces or coal particles with smaller particle sizes in raw coal to enable the raw coal surfaces or the coal particles to directly enter a coal bunker, so that the treatment capacity of a crusher is greatly reduced, the production efficiency is improved, the service life of a toothed roller of the crusher is prolonged, and the equipment maintenance cost is reduced.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention discloses a downhole large-scale raw coal screening device which is arranged on the output side of a raw coal conveyor belt and comprises side plates, a first cross beam, a supporting tube, a second cross beam, a screen plate and a vibrating motor, wherein the two side plates are symmetrically arranged in a face-to-face manner, the first cross beam, the supporting tube and the second cross beam are connected between the bottoms of the two side plates in parallel, the supporting tube is used for mounting the device on a downhole bracket, the screen plate is arranged above the first cross beam, the supporting tube and the second cross beam, a discharge hole for outputting small-granularity raw coal is correspondingly arranged at the tail part of a chute of the screen plate, two ends of the second cross beam symmetrically penetrate through the vertical walls of the side plates, and then two end faces of the second cross beam are respectively provided with a motor flange which is.
Furthermore, the upper end and the lower end of the side plate are outwards provided with first protective edges, a plurality of first reinforcing ribs are vertically arranged between the first protective edges, and the inner side edges of the first reinforcing ribs are connected to the outer wall of the side plate.
Furthermore, the supporting tube and the second cross beam penetrate through the periphery of the side plate behind the vertical wall and are respectively provided with a first outer reinforcing plate and a second outer reinforcing plate, the large inner sides of the first outer reinforcing plate and the second outer reinforcing plate are attached to the outer wall of the side plate, and the two sides of the first outer reinforcing plate and the two sides of the second outer reinforcing plate are respectively provided with the first reinforcing ribs.
Furthermore, an extension side guard plate is arranged above the side plate, a second protective edge of the extension side guard plate is connected with the first protective edge at the upper end through a bolt, and a second reinforcing rib is vertically arranged on the outer wall of the extension side guard plate.
Furthermore, a sieve plate bottom plate of the sieve plate is arranged at the tops of the first cross beam and the second cross beam through anchor ears.
Furthermore, the staple bolt includes staple bolt board and lower staple bolt board, go up staple bolt board fixed connection in on the bottom surface of sieve bottom plate, it is a plurality of staple bolt board down pass through the bolt with go up the staple bolt board and connect, go up staple bolt board and lower staple bolt board and cramp first crossbeam or second crossbeam.
Furthermore, the inner side of the side plate is provided with a lining plate, the lining plate is provided with a countersunk bolt hole, and the lining plate is fixedly connected to the inner wall of the side plate through the countersunk bolt.
Furthermore, the lining plate is made of polyurethane plate materials with good wear resistance.
Furthermore, vibrating motor is in the installation of inclining on the motor flange, vibrating motor's axis with the base contained angle of curb plate is X.
Further, the numerical range of the included angle X is 30-80 degrees.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention relates to an underground large-scale raw coal screening device, which is characterized in that the front part of the large-scale raw coal screening device is higher than the back part thereof and is arranged at the rear side of a raw coal conveying belt conveyor in an inclined manner, raw coal output from the belt conveyor or a damping device falls onto a screen plate of the device, and raw coal surface or coal particles with smaller particle size fall into a chute below the screen surface of the screen plate, are output to a discharge port along the inclined chute and are directly discharged into a coal bunker through the discharge port; coal blocks with large particle sizes slide down along the sieve surface of the sieve plate and enter a crusher for crushing treatment after passing through a slide carriage at the rear part of the device; furthermore, the screening effect of the equipment can be enhanced through the directional vibration of the vibration motor, so that the raw coal surface or coal particles with smaller particle size can fully fall into a chute of the screen plate. The invention greatly reduces the processing amount of the crusher, improves the production efficiency, and simultaneously avoids the blockage or damage of the crusher, so that the service life of the crusher tooth roller is prolonged, and the equipment maintenance cost is reduced.
In addition, through the arrangement of the first protective edge, the first reinforcing rib, the first outer reinforcing plate and the second outer reinforcing plate, the overall strength and rigidity of the large-scale raw coal screening device can be increased, and the impact resistance of the device is improved. By prolonging the arrangement of the side protection plates, the instantaneous storage capacity of the large-scale raw coal screening device can be improved, and raw coal is prevented from overflowing from the top of the device; through the setting of second strengthening rib, be favorable to increasing the rigidity and the intensity that prolong the side guard plate, reduce the impact deformation. Through the setting of split type staple bolt, be convenient for carry out the change of sieve through dismantling the staple bolt, be convenient for change the suitable sieve of gap degree according to concrete operating mode, be convenient for simultaneously carry out convenient the change to the sieve of damage. The arrangement of the lining plate made of polyurethane can protect the inner wall of the side plate, and damage to the side plate due to rubbing of gliding raw coal is avoided. The vibrating motors have the same mass and synchronously rotate in opposite directions or move in opposite directions, the components of the centrifugal force generated at each moment along the vibrating direction are always superposed, and the components in the normal direction are always offset, so that a single exciting force along the vibrating direction is formed, and the aim of efficiently vibrating and dewatering is fulfilled by the screen box.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic structural diagram of a main view of an underground large-scale raw coal screening device;
FIG. 2 is a schematic structural diagram of a large-scale raw coal screening device in a side view in cross section according to the invention;
description of reference numerals: 1. a side plate; 101. a first protective edge; 102. a first reinforcing rib; 103. a first outer stiffener; 104. a second outer stiffening plate; 2. a first cross member; 3. extending the side guard plate; 301. a second protective edge; 302. a second reinforcing rib; 4. supporting a tube; 5. a second cross member; 501. a motor flange; 6. a sieve plate; 601. a sieve plate bottom plate; 7. hooping; 701. an upper hoop plate; 702. a lower hoop plate; 8. a liner plate; 9. a vibration motor; 10. and (4) a discharge port.
Detailed Description
The core of the invention is to provide a large-scale underground raw coal screening device, which can screen the raw coal surface or coal particles with smaller particle size in the raw coal to directly enter a coal bunker, thereby greatly reducing the processing amount of a crusher, improving the production efficiency, prolonging the service life of a toothed roller of the crusher and reducing the maintenance cost of equipment.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The drawings illustrate that, in the following detailed description, the upper, lower, left and right descriptions are provided for the drawings in the specification, and should not be construed as limiting the invention.
In one embodiment of the invention, as shown in fig. 1 and 2, a downhole large-scale raw coal screening device is installed on the output side of a raw coal conveyor belt and comprises a side plate 1, a first cross beam 2, a support tube 4 and a second cross beam 5, sieve 6 and vibrating motor 9, two curb plate 1 sets up to the face symmetry, first crossbeam 2, stay tube 4 and second crossbeam 5 parallel arrangement each other and welded connection are between the bottom of two curb plates 1, stay tube 4 is used for installing this device on the underground carriage, sieve 6 sets up at first crossbeam 2, stay tube 4 and second crossbeam 5's top, sieve 6 chute afterbody corresponds the position and offers the discharge gate 10 that is used for exporting the raw coal of small particle size, two terminal surfaces are provided with motor flange 501 respectively behind the founding wall that curb plate 1 was passed to second crossbeam 5 both ends symmetry, motor flange 501 connects vibrating motor 9.
The large-scale raw coal screening device is obliquely arranged on the rear side of a raw coal conveying belt conveyor in a front-high and back-low manner, raw coal output from the belt conveyor or a damping device falls onto a screen plate 6 of the device, raw coal surface or coal particles with smaller particle size fall into a chute below the screen surface of the screen plate 6, are output to a discharge port 10 along the oblique chute, and are directly discharged into a coal bunker through the discharge port 10; coal blocks with large particle sizes slide down along the sieve surface of the sieve plate 6 and enter a crusher for crushing treatment after passing through a slide carriage at the rear part of the device; furthermore, the screening effect of the equipment can be enhanced through the directional vibration of the vibration motor 9, so that the raw coal surface or coal particles with smaller particle size can fully fall into the chute of the screen plate 6. The invention greatly reduces the processing amount of the crusher, improves the production efficiency, and simultaneously avoids the blockage or damage of the crusher, so that the service life of the crusher tooth roller is prolonged, and the equipment maintenance cost is reduced.
In an embodiment of the present invention, as shown in fig. 1 and 2, the upper and lower ends of the side plate 1 are outwardly provided with first protective edges 101, a plurality of first reinforcing ribs 102 are vertically arranged between the first protective edges 101, and the inner side edges of the first reinforcing ribs 102 are connected to the outer wall of the side plate 1.
Furthermore, the peripheries of the supporting tube 4 and the second beam 5 after penetrating through the vertical wall of the side plate 1 are respectively welded with a first outer reinforcing plate 103 and a second outer reinforcing plate 104, the inner large faces of the first outer reinforcing plate 103 and the second outer reinforcing plate 104 are attached to the outer wall of the side plate 1, and first reinforcing ribs 102 are respectively arranged on two sides of the first outer reinforcing plate 103 and two sides of the second outer reinforcing plate 104. Through the arrangement of the first protective edge 101, the first reinforcing rib 102, the first outer reinforcing plate 103 and the second outer reinforcing plate 104, the overall strength and rigidity of the large-scale raw coal screening device can be increased, and the impact resistance of the device is improved.
In an embodiment of the present invention, as shown in fig. 1 and 2, an extension side guard 3 is installed above a side plate 1, a second guard 301 of the extension side guard 3 is connected to a first guard 101 at an upper end by a bolt, and a second reinforcing rib 302 is vertically provided on an outer wall of the extension side guard 3. By prolonging the arrangement of the side guard plates 3, the instantaneous storage capacity of the large-scale raw coal screening device can be improved, and raw coal is prevented from overflowing from the top of the device; through the arrangement of the second reinforcing ribs 302, the rigidity and the strength of the extension side guard plate 3 are increased, and the impact deformation is reduced.
In an embodiment of the invention, as shown in fig. 2, the deck bottom 601 of the deck 6 is mounted on top of the first 2 and second 5 beams by means of hoops 7.
Further, staple bolt 7 includes staple bolt board 701 and lower staple bolt board 702, goes up staple bolt board 701 fixed connection on the bottom surface of sieve bottom plate 601, and a plurality of lower staple bolt boards 702 are connected with last staple bolt board 701 through the bolt, goes up staple bolt board 701 and lower staple bolt board 702 and cramps first crossbeam 2 or second crossbeam 5. Through split type staple bolt 7's setting, be convenient for carry out sieve 6's change through dismantling staple bolt 7, be convenient for change the sieve 6 that the gap degree is suitable according to concrete operating mode, be convenient for carry out convenient the change to the sieve 6 of damage simultaneously.
In an embodiment of the present invention, as shown in fig. 2, a lining plate 8 is disposed on the inner side of the side plate 1, a countersunk bolt hole is disposed on the lining plate 8, and the lining plate 8 is fixedly connected to the inner wall of the side plate 1 by means of a countersunk bolt. Further, the lining plate 8 is made of polyurethane plate material with good wear resistance. The arrangement of the lining plate 8 made of polyurethane can protect the inner wall of the side plate 1, and damage caused by sliding raw coal rubbing of the side plate 1 is avoided.
In an embodiment of the present invention, as shown in fig. 2, the vibration motor 9 is mounted on the motor flange 501 in an inclined manner, and an included angle between the axis of the vibration motor 9 and the bottom edge of the side plate 1 is X. Further, the numerical range of the included angle X is 30-80 degrees. According to the self-synchronizing principle, the action direction of the exciting force generated by the vibration motors 9 forms a fixed included angle X with the horizontal direction, the vibration motors 9 have the same mass and synchronously rotate in opposite directions or move in opposite directions, the component forces of the centrifugal force generated at each moment along the vibration direction are always superposed, and the component forces in the normal directions of the centrifugal force are always offset with each other, so that the single exciting force along the vibration direction is formed, and the aim of efficiently vibrating and dewatering is fulfilled by the sieve box.
According to the underground large-scale raw coal screening device, the large-scale raw coal screening device is obliquely arranged on the rear side of a raw coal conveying belt conveyor in a front-high and back-low mode, raw coal output from the belt conveyor or a damping device falls onto a screen plate 6 of the device, raw coal surfaces or coal particles with smaller particle sizes fall into a chute below the screen surface of the screen plate 6, are output to a discharge port 10 along the oblique chute, and are directly discharged into a coal bunker through the discharge port 10; coal blocks with large particle sizes slide down along the sieve surface of the sieve plate 6 and enter a crusher for crushing treatment after passing through a slide carriage at the rear part of the device; furthermore, the screening effect of the equipment can be enhanced through the directional vibration of the vibration motor 9, so that the raw coal surface or coal particles with smaller particle size can fully fall into the chute of the screen plate 6. The invention greatly reduces the processing amount of the crusher, improves the production efficiency, and simultaneously avoids the blockage or damage of the crusher, so that the service life of the crusher tooth roller is prolonged, and the equipment maintenance cost is reduced. In addition, through the arrangement of the first protective edge 101, the first reinforcing rib 102, the first outer reinforcing plate 103 and the second outer reinforcing plate 104, the overall strength and rigidity of the large-scale raw coal screening device can be increased, and the impact resistance of the device is improved. By prolonging the arrangement of the side guard plates 3, the instantaneous storage capacity of the large-scale raw coal screening device can be improved, and raw coal is prevented from overflowing from the top of the device; through the arrangement of the second reinforcing ribs 302, the rigidity and the strength of the extension side guard plate 3 are increased, and the impact deformation is reduced. Through split type staple bolt 7's setting, be convenient for carry out sieve 6's change through dismantling staple bolt 7, be convenient for change the sieve 6 that the gap degree is suitable according to concrete operating mode, be convenient for carry out convenient the change to the sieve 6 of damage simultaneously. The arrangement of the lining plate 8 made of polyurethane can protect the inner wall of the side plate 1, and damage caused by sliding raw coal rubbing of the side plate 1 is avoided. The vibrating motors 9 have the same mass and synchronously rotate in opposite directions or move in opposite directions, the components of the centrifugal force generated at each moment along the vibrating direction are always superposed, and the components in the normal direction are always offset, so that a single exciting force along the vibrating direction is formed, and the aim of efficiently vibrating and dewatering is fulfilled by the screen box.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the scope of the present invention is defined by the claims.
Claims (8)
1. The utility model provides a large-scale raw coal screening plant in pit, sets up the output side at raw coal belt conveyor, its characterized in that: comprises side plates (1), a first beam (2), a supporting tube (4), a second beam (5), a sieve plate (6) and a vibration motor (9), wherein the two side plates (1) are arranged symmetrically in a face-to-face manner, the first beam (2), the supporting tube (4) and the second beam (5) are mutually connected between the bottoms of the two side plates (1) in parallel, the supporting tube (4) is used for mounting the device on a downhole bracket, the sieve plate (6) is arranged above the first cross beam (2), the supporting tube (4) and the second cross beam (5), the tail part of the chute of the sieve plate (6) is correspondingly provided with a discharge hole (10) for outputting the small-granularity raw coal, two ends of the second cross beam (5) symmetrically penetrate through the two end faces of the rear end face of the vertical wall of the side plate (1), and motor flanges (501) are respectively arranged on the two end faces, and the motor flanges (501) are connected with the vibration motor (9);
a sieve plate bottom plate (601) of the sieve plate (6) is arranged at the tops of the first cross beam (2) and the second cross beam (5) through anchor ears (7);
staple bolt (7) are including last armful hoop board (701) and lower armful hoop board (702), go up armful hoop board (701) fixed connection be in on the bottom surface of sieve bottom plate (601), a plurality of lower armful hoop board (702) pass through the bolt with go up armful hoop board (701) and connect, go up armful hoop board (701) and hoop board (702) down and hoop first crossbeam (2) or second crossbeam (5).
2. The underground large-scale raw coal screening device according to claim 1, wherein: the upper end and the lower end of the side plate (1) are outwards provided with first protective edges (101), a plurality of first reinforcing ribs (102) are vertically arranged between the first protective edges (101), and the inner side edges of the first reinforcing ribs (102) are connected to the outer wall of the side plate (1).
3. The downhole large raw coal screening device of claim 2, wherein: the supporting tube (4) and the second cross beam (5) penetrate through the periphery behind the vertical wall of the side plate (1) and are respectively provided with a first outer reinforcing plate (103) and a second outer reinforcing plate (104), the large inner side faces of the first outer reinforcing plate (103) and the second outer reinforcing plate (104) are attached to the outer wall of the side plate (1), and the two sides of the first outer reinforcing plate (103) and the second outer reinforcing plate (104) are respectively provided with the first reinforcing ribs (102).
4. The downhole large raw coal screening device of claim 2, wherein: the side guard plate is characterized in that an extension side guard plate (3) is arranged above the side plate (1), a second protective edge (301) of the extension side guard plate (3) is connected with the first protective edge (101) at the upper end through a bolt, and a second reinforcing rib (302) is vertically arranged on the outer wall of the extension side guard plate (3).
5. The underground large-scale raw coal screening device according to claim 1, wherein: the inner side of the side plate (1) is provided with a lining plate (8), the lining plate (8) is provided with a countersunk bolt hole, and the lining plate (8) is fixedly connected to the inner wall of the side plate (1) through the countersunk bolt.
6. The underground large-scale raw coal screening device according to claim 5, wherein: the lining plate (8) is made of polyurethane plate materials with good wear resistance.
7. The underground large-scale raw coal screening device according to claim 1, wherein: vibrating motor (9) is in the installation of inclining on motor flange (501), the axis of vibrating motor (9) with the base contained angle of curb plate (1) is X.
8. The underground large-scale raw coal screening device according to claim 7, wherein: the numerical range of the included angle X is 30-80 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910879537.2A CN110586460B (en) | 2019-09-18 | 2019-09-18 | Underground large raw coal screening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910879537.2A CN110586460B (en) | 2019-09-18 | 2019-09-18 | Underground large raw coal screening device |
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| Publication Number | Publication Date |
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| CN110586460A CN110586460A (en) | 2019-12-20 |
| CN110586460B true CN110586460B (en) | 2021-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910879537.2A Active CN110586460B (en) | 2019-09-18 | 2019-09-18 | Underground large raw coal screening device |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1126484A (en) * | 1964-12-18 | 1968-09-05 | Coal Industry Patents Ltd | Screening apparatus having an electrically heated screen |
| CN201410466Y (en) * | 2009-06-16 | 2010-02-24 | 鞍山重型矿山机器股份有限公司 | Light round vibrating screen |
| CN202700803U (en) * | 2012-06-19 | 2013-01-30 | 中国矿业大学(北京) | Vibrating screen supporting screen plate device |
| CN202845301U (en) * | 2012-08-16 | 2013-04-03 | 南昌矿山机械有限公司 | YKR / ZKR type vibrating screen |
| CN203972295U (en) * | 2014-07-11 | 2014-12-03 | 钟祥市新宇机电制造有限公司 | Rubbish classifying screen |
| CN104624488B (en) * | 2015-02-02 | 2016-01-20 | 江苏鹏飞集团股份有限公司 | Straight line flip flop screen |
| CN107127149B (en) * | 2017-07-07 | 2019-08-02 | 中国矿业大学 | A kind of totally-enclosed circular vibration flip flop screen of modularization |
| CN107225086B (en) * | 2017-07-31 | 2023-01-06 | 塞尔姆（北京）科技有限责任公司 | Heavy high frequency miropowder sieve of individual layer |
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2019
- 2019-09-18 CN CN201910879537.2A patent/CN110586460B/en active Active
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