CN210701164U - Material classified screening device - Google Patents

Abstract

The utility model provides a material grading and screening device, which comprises a feeding cylinder, a distribution device, a primary screening device and a secondary screening device, wherein the distribution device is connected with and positioned below the feeding cylinder; the first-stage screening device is internally provided with a first screen and a screen plate which are obliquely arranged, the screen plate is parallel to the first screen, the bottom of the screen plate is connected with a first collecting device, and a falling channel for falling materials is formed at the bottom of the screen plate; the secondary screening device includes: the device comprises a driving mechanism, a screening cylinder and a conical roller which is arranged in the screening cylinder and horizontally rotates under the driving of a driving device, wherein the conical surface of the conical roller is covered with at least two screens with different filtering apertures. The utility model discloses a material classified screening device can be in succession in batches carry out classified screening to the material of the multiple different particle diameter scope that contains in the material to the reliability and the classified screening efficiency of this material classified screening device operation have been improved remarkably.

Description

Material classified screening device

Technical Field

The utility model relates to a material screening technical field especially relates to a material classifying screen device.

Background

Raw materials for production in the industries of chemical industry, mine industry, coal industry, grain industry, food industry, mineral processing industry and the like often contain various impurities, such as soil, sand stone, grass seeds, miscellaneous cereals, metal and the like, and the impurities must be removed by a screening device. Meanwhile, in the actual use process, different materials or different impurities are required to be classified and screened according to the particle size. The screening device in the prior art only can carry out impurity removal operation or carry out classified screening operation on the materials after impurity removal with single function, so that the traditional screening device has certain limitation when in use. In addition, the prior art generally uses high-speed airflow to blow the materials for screening the particle sizes of the materials, and utilizes the difference of the weight of the materials to realize classified collection. The prior art causes certain air pollution when in use, and actually utilizes high-speed airflow to blow materials to realize the classification of the particle sizes of the materials, and has the technical defect of inaccurate material classification.

For example, chinese utility model patent with publication number CN204769572U discloses a tea fruit classifying and screening and shell breaking device, which indicates that the feeding hopper in a contracted form is horizontally arranged in a spiral screening device as a whole, and through the shrinkage hole with gradually changed diameter, which is arranged on the outer wall of the conical barrel, so as to take out the tea fruit, and realize the classifying and screening function of the tea fruit with different sizes. The applicant thinks that this kind of sieving mechanism to tea fruit not only has the limitation of the applicable object of classified screening, and more importantly, this prior art drops easily when inputing to the feeder hopper to tea fruit, can only rely on the manual work once to put into the feeder hopper with tea fruit to the effect that leads to the classified screening to tea fruit is relatively poor. In particular, the applicant indicates that the tea fruit grading, screening and shell breaking device has undesirable effect on continuous and large-scale grading and screening of materials (namely tea fruits) and has low grading and screening efficiency.

In view of the above, there is a need for an improved screening device in the prior art to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to disclose a material classified screening device for realize that the material realizes continuous, efficient classified screening, and avoid the material to cause secondary pollution to the air at the classified screening in-process, in order to improve the reliability.

In order to achieve the above object, the utility model provides a material classifying and screening device, include:

the distribution device, the primary screening device and the secondary screening device are arranged below the feeding cylinder;

the first screening device is internally provided with a first screen and a screen plate which are obliquely arranged, the screen plate is parallel to the first screen, the bottom of the screen plate is connected with a first collecting device, the bottom of the screen plate forms a falling channel for materials to fall, and the top of the first screening device is provided with a vibrating motor;

the secondary screening device comprises: the device comprises a driving mechanism, a screening cylinder and a conical roller which is arranged in the screening cylinder and horizontally rotates under the driving of a driving device, wherein the conical surface of the conical roller is covered with at least two screens with different filtering apertures.

As a further improvement of the present invention, the distribution device includes a distributor and a plurality of distribution pipes respectively connecting the distributor and the one-level screening device, the distribution pipes are flexible pipes.

As a further improvement of the present invention, the driving mechanism comprises a rotating motor, a reducer, a coupler and a rotating shaft which are coaxially arranged, the rotating shaft horizontally penetrates through the conical roller and drives the conical roller to horizontally rotate in the screening cylinder, and the bottom of the screening cylinder is provided with a first collecting cylinder, a second collecting cylinder and a third collecting cylinder;

and a fourth collecting cylinder is arranged in the primary screening device and is communicated with a cavity formed above the first screen.

As a further improvement of the utility model, a conical bottom pipe which is deviated to the second-stage screening device is formed at the bottom of the first-stage screening device, and the conical bottom pipe guides the materials into the conical roller through an inclined pipe;

a partition plate is arranged at one end, close to the driving mechanism, of the screening cylinder, the partition plate is sleeved on an inner ring of the bearing, one end, with the larger diameter, of the conical roller is sleeved on an outer ring of the bearing, and the partition plate is provided with a through hole which is communicated with the inclined pipe and used for allowing materials to enter the conical roller;

and a second screen is arranged at the end with the smaller diameter of the conical roller and is positioned above the third collecting cylinder.

As a further improvement of the present invention, the tapered roller comprises: the vertical rods are axially contracted and configured along the extension direction of the rotating shaft, a plurality of connecting rods are arranged between the vertical rods and the rotating shaft, the connecting rods are intersected at the rotating shaft, a supporting seat with a built-in bearing is configured, the rotating shaft penetrates through the supporting seat, the vertical rods support and cover a third screen and a fourth screen, the third screen is positioned above the first collecting barrel, and the fourth screen is positioned above the second collecting barrel;

the third screen, the fourth screen and the second screen are metal screens with sequentially decreasing filtering apertures.

As a further improvement of the utility model, the material grading and screening device also comprises a cover plate buckled at the top of the feeding cylinder;

the feeding cylinder is internally provided with an inner cylinder which is eccentrically arranged, a first blocking plate and a second blocking plate which are obliquely arranged in parallel, a third blocking plate which is connected with the cover plate and is vertically arranged, and a fourth blocking plate which is tangent to the outer wall of the cylinder and is arranged in parallel with the third blocking plate.

As a further improvement of the utility model, the length of first barrier plate is less than the length of second barrier plate, the first blanking passageway that the bottom of second barrier plate extended to feeding bobbin base portion and was connected with distributor.

As a further improvement, the inside of drum sets up and laps the connection and be the fifth barrier plate of perpendicular setting, the horizontal distance between fifth barrier plate and the fourth barrier plate does at least the twice of the horizontal distance between fourth barrier plate and the third barrier plate.

As a further improvement of the utility model, the material classifying and screening device further comprises an induced draft fan connected with the inner cylinder only, and the induced draft fan is connected into the inner cylinder through an induced draft pipeline; and a second blanking channel separated from the first blanking channel is arranged at the bottom of the inner cylinder.

As a further improvement of the utility model, the rotating shaft horizontally and transversely penetrates through the conical roller and the screening drum and extends out of the screening drum, and the tail end of the rotating shaft is embedded on the rotating bracket;

the rotating bracket is composed of a second supporting seat and a supporting bearing for accommodating the rotating shaft.

Compared with the prior art, the beneficial effects of the utility model are that: through the utility model discloses a material classified screening device, the material to the multiple different particle diameter scope that contains in the material that can be in continuous batch carries out classified screening to improve the reliability and the classified screening efficiency of this material classified screening device operation, and avoided the material at the secondary pollution that the classified screening in-process caused the air.

Drawings

FIG. 1 is a schematic structural view of the upper half of a material classifying and screening device of the present invention;

FIG. 2 is a schematic structural view of the lower half part of the material classifying and screening device of the present invention;

fig. 3 is a sectional view taken along line a-a of fig. 1.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

It should be understood that in the present embodiment, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "positive", "negative", etc. indicate the orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present technical solution and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the technical solution.

Referring to fig. 1 to 3, a specific embodiment of a material classifying and screening apparatus of the present invention is disclosed; wherein, fig. 1 and fig. 2 are arranged up and down on a three-dimensional space and are connected through an inclined pipe 11 to jointly form the material grading and screening device. The material classifying and screening device disclosed by the embodiment can be used for classifying and screening granular materials with the particle size distribution range of 1-20 mm, and the materials which can be processed comprise but are not limited to metal particles, grains, grass seeds, sand and stones and the like, and can be used for screening out materials with three particle size ranges of coarse particles, medium particles and fine particles. It should be noted that, in the present embodiment, the coarse-grained materials, the medium-grained materials and the fine-grained materials are only relative terms, and the material classifying and screening device disclosed in the present embodiment can separate materials with more diversified grain size ranges according to actual use requirements, and specific implementation manners thereof are shown below. Meanwhile, the material classifying and screening device disclosed by the embodiment can not only perform classifying and screening operations on materials, but also perform various similar operations such as dehydration and desliming.

It should be noted that fig. 1 and fig. 2 are simplified representations of the material classifying and screening device, and are made of a plate or a pipe with a certain thickness in an actual manufacturing process; wherein, the pipe and the plate can be made of stainless steel with the metal mark of above SUS 304.

In this embodiment, a material classifying and screening device includes: a feeding cylinder 2, a distribution device connected with the feeding cylinder 2 and positioned below the feeding cylinder, a primary screening device 7 and a secondary screening device. The top of the feeding cylinder 2 is provided with an opening for feeding materials into the feeding cylinder 2. The material classifying and screening device further comprises a cover plate 37 buckled at the top of the feeding cylinder 2, so that the feeding cylinder 2 is movably covered by the cover plate 37. The opening formed in the top of the feed cylinder 2 is circular and fits into a circular cover plate 37. When the material classifying and screening device is used, the cover plate 37 covers the top opening of the feeding cylinder 2, and materials are simultaneously conveyed to the feeding cylinder 2 through the feeding pipe 1 arranged on the cover plate 37.

The material classifying and screening device further comprises an induced draft fan 31 which is only connected with the inner barrel 30, and the induced draft fan 31 is connected into the inner barrel 30 through an induced draft pipeline 32. The opening 321 of the draft duct 32 communicates with the internal cavity formed by the inner barrel 30. The bottom of the inner cylinder 30 is provided with a second blanking channel 29 separated from the first blanking channel 201. The second blanking channel 29 can be used in cooperation with a cloth bag type dust collector mature in the prior art to eliminate fine dust generated by the material classifying and screening device during operation through the cloth bag type dust collector, so that secondary pollution to air is reduced.

In particular, the feed cylinder 2 may be fixed by a frame (not shown) made of angle steel. More specifically, in the present embodiment, the feed pipe 1 is located above the first blocking plate 3 in the vertical direction. The first blocking plate 3 and the second blocking plate 4 are arranged at intervals up and down, are parallel and are inclined downwards. The material not classified and screened falls from the feeding pipe 1 onto the first barrier plate 3 and falls down onto the second barrier plate 4. Because the length of first barrier plate 3 is less than the length of second barrier plate 4 for the material of whereabouts is difficult to pile up in feed cylinder 2, has reduced the angle of repose that granular material formed effectively, makes more smooth downward flow in feed cylinder 2 of granular material, in order to prevent that the material from blockking up the first blanking pipe 201 that the feed cylinder 2 bottom set up. The feed cylinder 2 and the inner cylinder 30 form an integral structure.

Referring to fig. 1 and 3, in this embodiment, the feeding cylinder 2 has an eccentric inner cylinder 30, a first blocking plate 3 and a second blocking plate 4 which are obliquely arranged in parallel, a third blocking plate 38 which is connected to the cover plate 37 and is vertically arranged, and a fourth blocking plate 33 which is tangent to the outer wall of the cylinder 30 and is arranged in parallel with the third blocking plate 38. The cylinder 30 is internally provided with a fifth stop plate 34 which is connected with the cover plate 37 and is vertically arranged, and the horizontal distance between the fifth stop plate 34 and the fourth stop plate 33 is at least twice as long as the horizontal distance between the fourth stop plate 33 and the third stop plate 38.

In fig. 3, the third blocking plate 38 and the fourth blocking plate 33 form a strip-shaped drop gap (see arrow C in fig. 3). Meanwhile, the width of the gap (in the horizontal direction) shown by the arrow E in fig. 3 is at least two times or more, and most preferably three times, the width of the gap (in the horizontal direction) shown by the arrow D. Through the structure, the materials which enter the feeding cylinder 2 and are in particle shapes collide with each other in the feeding cylinder 2 in small amplitude and high frequency under the action of the negative pressure airflow formed by the draught fan 31, and the repose angle formed by the particle materials is further reduced.

In particular, in the embodiment, the third blocking plate 38, the fourth blocking plate 33 and the fifth blocking plate 34 are arranged, so that the material with a relatively large particle size (generally, the material with a particle size larger than 1 mm) can fall into the distribution device through the first blanking channel 201 through the gap shown by the arrow C, and simultaneously, the particles in the powder form (generally, the material with a particle size smaller than 1 mm) can sequentially and roundly pass through the third blocking plate 38, the fourth blocking plate 33 and the fifth blocking plate 34, and under the action of the third blocking plate 38 and the fourth blocking plate 33 in sequence, the particles with a relatively large particle size are effectively prevented from being attracted by the air flow formed by the induced draft fan 31 to enter the inner barrel 30, so that only extremely fine dust and fine particles in the material are screened from the material, and the yield after the material classification screening is improved. Finally, in the present embodiment, the bottom of the second blocking plate 4 extends to the bottom of the feeding cylinder 2 and is connected to the first blanking channel 201 of the distribution device, so that the remaining material separated from the powder particles by the negative pressure airflow generated by the induced draft fan 31 flows to the first blanking channel 201. Meanwhile, the fifth barrier plate 34 is arranged, the vertically arranged fifth barrier plate 34 can divide and cut off the negative pressure airflow formed by the induced draft fan 31, and a plurality of vortexes are formed in the inner barrel 30, so that the ultrafine dust and fine particles are driven to move to the second blanking channel 29, and the ultrafine dust and fine particles are prevented from being sucked by the induced draft fan 31 and discharged to the atmospheric environment. Of course, a filter screen (not shown) may be disposed in the induced draft duct 32 by those skilled in the art to further prevent the extremely fine dust and fine particles from being sucked by the induced draft fan 31 and discharged to the atmosphere, so as to reduce the secondary pollution to the air caused by the operation of the material classifying and screening device.

In this embodiment, the first screening device 7 is provided with a first screen 8 and a screen plate 71 which are obliquely arranged, the screen plate 71 is arranged in parallel with the first screen 8, the bottom of the screen plate 71 is connected with a first collecting device, the bottom of the screen plate 71 forms a falling channel 72 for the material to fall, and the top of the first screening device 7 is provided with a vibrating motor 9. The vibration motor 9 can adopt a servo motor or an alternating current motor and is provided with an eccentric wheel, and the integral drive primary screening device 7 vibrates.

The secondary screening device includes: the device comprises a driving mechanism, a screening drum 40 and a conical roller 22 which is arranged in the screening drum and horizontally rotates under the driving of a driving device, wherein at least two screens with different filter apertures are covered on the conical surface of the conical roller 22.

In the present embodiment, the distribution device includes a distributor 5 and three distribution pipes respectively connecting the distributor 5 and the primary screening device 7, and a distribution pipe 61, a distribution pipe 62 and a distribution pipe 63. The distribution pipe 61, the distribution pipe 62, and the distribution pipe 63 are flexible pipes and may be made of rubber having good weather resistance. The technical mode of adopting a plurality of distributing pipes makes the material that falls to the primary screening device 7 from the distributor 5 more evenly scatter on the first screen 8, thereby being favorable to the vibration separation of large granule material and other materials. A fourth collecting cylinder 28 is arranged in the primary screening device 7, and the fourth collecting cylinder 28 is communicated with a cavity formed above the first screen 8. Large particulate material slides from above the first screen 8 in the direction of arrow B in figure 1 into the fourth collection canister 28. The bottom of the primary screening device 7 forms a conical bottom tube 73 which is biased towards the secondary screening device.

Meanwhile, the first screen mesh 8 and the screen plate 71 are arranged in parallel and inclined mode, and specifically, the included angle between the first screen mesh 8 and the screen plate 71 and the horizontal plane is 15 degrees. Due to the arrangement of the screen deck 71 which is arranged obliquely, the material screened by the first screen mesh 8 can drop from the bottom of the screen deck 71 to the conical bottom pipe 73 by forming a dropping channel 72 for the material to fall along the screen deck 7 in a vibrating manner, and slide into the conical drum 22 through the inclined pipe 11 for further classified screening processing. Meanwhile, as the conical bottom pipe 73 is deviated from the secondary screening device, materials with small particle sizes are not easy to accumulate in the conical bottom pipe 73, so that the grading screening effect of the material grading screening device on materials with different particle sizes is improved to a certain extent.

Further, in the present embodiment, the driving mechanism is composed of a rotating electric machine 12, a speed reducer 13, a coupling 14, and a rotating shaft 21, which are coaxially provided. The rotating shaft 21 horizontally penetrates through the conical roller 22 and drives the conical roller 22 to horizontally rotate in the screening drum 40, and the bottom of the screening drum 40 is provided with a first collecting drum 17, a second collecting drum 18 and a third collecting drum 19. The screening cylinder 40 is cylindrical and is communicated with the first collecting cylinder 17, the second collecting cylinder 18 and the third collecting cylinder 19, so that materials with different particle sizes are collected through the first collecting cylinder 17, the second collecting cylinder 18 and the third collecting cylinder 19 respectively.

The bottom of the primary screening device 7 forms a conical bottom pipe 73 deviated to the secondary screening device, and the conical bottom pipe 73 guides the materials into the conical roller 22 through the inclined pipe 11. The tapered drum 22 includes: the screen cloth collecting device comprises a plurality of vertical rods 24 axially contracted and configured along the extending direction of a rotating shaft 21, a plurality of connecting rods 25 are arranged between the vertical rods 24 and the rotating shaft 21, the connecting rods 25 are intersected at the rotating shaft 21 and are provided with a first supporting seat 26 with a built-in bearing, the rotating shaft 21 penetrates through the first supporting seat 26, the vertical rods 24 support and cover a third screen cloth 27 and a fourth screen cloth 23, the third screen cloth 27 is positioned above a first collecting barrel 17, and the fourth screen cloth 23 is positioned above a second collecting barrel 18. The rotating shaft 21 horizontally and transversely penetrates through the conical roller 22 and the screening drum 40 and extends out of the screening drum 40, and the tail end 218 of the rotating shaft 21 is embedded on the rotating bracket. A plurality of reinforcing rings (not shown) formed by angle steel or band steel enclosure may be disposed on the conical surface formed by the plurality of vertical rods 24 to enhance the structural strength of the conical roller 22. Specifically, in the present embodiment, the rotating bracket is composed of a second supporting seat 224 and a supporting bearing 20 for accommodating the rotating shaft 21. It should be noted that the rotary motor 12 and the screening drum 40 of the present embodiment can be fixed by a frame (not shown) made of angle steel.

In this embodiment, the third screen 27, the fourth screen 23 and the second screen 222 are metal screens with sequentially decreasing filter hole diameters, so that a plurality of materials with different particle size ranges can be screened out by the third screen 27, the fourth screen 23 and the second screen 222. Furthermore, the mesh openings formed by the first screen 8, the third screen 27, the fourth screen 23 and the second screen 222 in this embodiment may be circular, square, rectangular or diamond-shaped or other shapes, and the aperture of the mesh opening formed by the first screen 8 is 10-20 mm, the aperture of the mesh opening formed by the third screen 27 is 8-9 mm, the aperture of the mesh opening formed by the fourth screen 23 is 4-7 mm, and the aperture of the mesh opening formed by the second screen 222 is 1-3 mm.

In particular, it should be noted that the material classifying and screening device disclosed in this embodiment is only an exemplary one, and in the practical use, the mesh size formed by the first screen 8, the third screen 27, the fourth screen 23 and the second screen 222 can be adjusted to form different sizes with the screening aperture from large to small, and can be determined according to the type and the property of the material to be classified and screened.

The screening drum 40 integrally accommodates the conical roller 22, and a partition plate 221 is arranged at one end close to the driving mechanism, the partition plate 221 is sleeved on the inner ring of the bearing 16, the partition plate 221 is circular, and particularly, the outer edge of the partition plate 221 is sleeved on the inner ring of the bearing 16; the larger end of the tapered roller 22 is sleeved on the outer ring of the bearing 16, and the partition plate 221 is provided with a through hole which is communicated with the inclined tube 11 and used for feeding materials into the tapered roller 22. The partition 221 is provided with a through hole (not shown) communicating with the inclined tube 11 for feeding the material to the tapered drum 22. With the above-described structure, when the drive motor 12 drives the tapered roller 22 to perform the pivotal movement in the horizontal direction, the partition 221 is kept stationary, and only the tapered roller 22 is rotated.

As shown in fig. 2, the material after the primary classification screening by the primary screening device 7 slides into the inner cavity of the cone-shaped drum 22 in the direction of the arrow B' in fig. 2. The smaller diameter end of the conical drum 22 is provided with a second screen 222, and the second screen 222 is positioned above the third collecting cylinder 19. The conical roller 22 is driven by the rotating motor 12 to integrally drive the plurality of vertical rods 24 to rotate around the rotating shaft 21 through the rotating shaft 21 and the partition 221, so that the material inside the conical roller 22 continuously rotates and passes through the third screen 27, the fourth screen 23 and the second screen 222 to respectively fall into the first collecting cylinder 17, the second collecting cylinder 18 and the third collecting cylinder 19. Meanwhile, the first supporting seat 26 and the connecting rod 25 are provided to make the tapered roller 22 more smooth and reliable in the pivoting motion about the rotating shaft 21. Meanwhile, as the end of the conical drum 22 close to the partition 221 is larger and the end far from the partition 221 is smaller, the material with smaller particle size can be gradually thrown to the second screen 222 under the action of centrifugal force and the material with the screened particle size of the second screen 222 is thrown out of the conical drum 22 and finally falls into the third collecting barrel 19.

Through the material classified screening device disclosed by the embodiment, the materials with different particle size ranges contained in the materials can be classified and screened continuously in batches, the operation reliability and the classified screening efficiency of the material classified screening device are improved, and the secondary pollution of the materials to the air in the classified screening process is avoided.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. A material classifying and screening device is characterized by comprising:

the feeding cylinder (2), the distributing device, the primary screening device (7) and the secondary screening device are connected with the feeding cylinder (2) and positioned below the feeding cylinder;

a first screen mesh (8) and a screen plate (71) which are obliquely arranged are arranged in the primary screening device (7), the screen plate (71) is parallel to the first screen mesh (8), the bottom of the screen plate (71) is connected with a first collecting device, a falling channel (72) for falling of materials is formed at the bottom of the screen plate (71), and a vibrating motor (9) is arranged at the top of the primary screening device (7);

the secondary screening device comprises: the device comprises a driving mechanism, a screening drum (40) and a conical roller (22) which is arranged in the screening drum and horizontally rotates under the driving of a driving device, wherein at least two screens with different filtering apertures are covered on the conical surface of the conical roller (22).

2. The apparatus for classifying and screening materials according to claim 1, wherein the distribution apparatus comprises a distributor (5) and a plurality of distribution pipes respectively connecting the distributor (5) and the primary screening apparatus (7), and the distribution pipes are flexible pipes.

3. The material classifying and screening device according to claim 1, wherein the driving mechanism is composed of a rotating motor (12), a reducer (13), a coupling (14) and a rotating shaft (21) which are coaxially arranged, the rotating shaft (21) horizontally penetrates through the conical roller (22) and drives the conical roller (22) to horizontally rotate in the screening cylinder (40), and the bottom of the screening cylinder (40) is provided with a first collecting cylinder (17), a second collecting cylinder (18) and a third collecting cylinder (19);

a fourth collecting cylinder (28) is arranged in the primary screening device (7), and the fourth collecting cylinder (28) is communicated with a cavity formed above the first screen (8).

4. The apparatus for classifying and screening materials according to claim 3, wherein the bottom of the primary screening device (7) is formed with a tapered bottom pipe (73) biased toward the secondary screening device, the tapered bottom pipe (73) guiding the materials into the interior of the tapered drum (22) through the inclined pipe (11);

a partition plate (221) is arranged at one end, close to the driving mechanism, of the screening cylinder (40), the partition plate (221) is sleeved on an inner ring of the bearing (16), one end, with a larger diameter, of the conical roller (22) is sleeved on an outer ring of the bearing (16), and the partition plate (221) is provided with a through hole which is communicated with the inclined tube (11) and used for allowing materials to enter the conical roller (22);

the end of the conical roller (22) with the smaller diameter is provided with a second screen (222), and the second screen (222) is positioned above the third collecting cylinder (19).

5. The apparatus for classifying and screening materials according to claim 4, wherein the conical drum (22) includes: the screen cloth screening device comprises a plurality of vertical rods (24) which are axially contracted and configured along the extension direction of a rotating shaft (21), a plurality of connecting rods (25) are arranged between the vertical rods (24) and the rotating shaft (21), the connecting rods (25) are intersected at the rotating shaft (21) and are provided with first supporting seats (26) with bearings inside, the rotating shaft (21) penetrates through the first supporting seats (26), the vertical rods (24) support and cover a third screen cloth (27) and a fourth screen cloth (23), the third screen cloth (27) is positioned above a first collecting cylinder (17), and the fourth screen cloth (23) is positioned above a second collecting cylinder (18);

the third screen (27), the fourth screen (23) and the second screen (222) are respectively metal screens with sequentially decreasing filtering aperture.

6. A material classifying and screening device according to any one of claims 1 to 5, further comprising a cover plate (37) snap-fitted on top of the feed cylinder (2);

an inner barrel (30) which is eccentrically arranged is arranged in the feeding barrel (2), a first blocking plate (3) and a second blocking plate (4) which are obliquely arranged in parallel, a third blocking plate (38) which is connected with the cover plate (37) and is vertically arranged, and a fourth blocking plate (33) which is tangent to the outer wall of the inner barrel (30) and is arranged in parallel with the third blocking plate (38) are arranged in the feeding barrel.

7. The apparatus for the classified screening of materials according to claim 6, wherein the length of the first blocking plate (3) is smaller than the length of the second blocking plate (4), and the bottom of the second blocking plate (4) extends to the first blanking channel (201) of the bottom of the feeding cylinder (2) and is connected with the distribution device.

8. The apparatus for classifying and screening materials according to claim 6, wherein a fifth baffle plate (34) connected to the cover plate (37) and vertically disposed is disposed inside the inner cylinder (30), and the horizontal distance between the fifth baffle plate (34) and the fourth baffle plate (33) is at least twice as long as the horizontal distance between the fourth baffle plate (33) and the third baffle plate (38).

9. The material classifying and screening device according to claim 8, further comprising an induced draft fan (31) connected with the inner barrel (30) only, wherein the induced draft fan (31) is connected to the inside of the inner barrel (30) through an induced draft pipeline (32); and a second blanking channel (29) separated from the first blanking channel (201) is arranged at the bottom of the inner cylinder (30).

10. The material classifying and screening device according to claim 3, wherein the rotary shaft (21) horizontally and transversely penetrates through the conical roller (22) and the screening drum (40) and extends out of the screening drum (40), and the tail end of the rotary shaft (21) is embedded on the rotary bracket;

the rotating bracket is composed of a second supporting seat (224) and a supporting bearing (20) for accommodating the rotating shaft (21).

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