CN214021824U

CN214021824U - Roller screen

Info

Publication number: CN214021824U
Application number: CN202022865924.1U
Authority: CN
Inventors: 何清; 闫红新; 王勇; 潘正云; 杨文生; 李晨
Original assignee: Hefei Design And Research Institute Of Coal Industry LLC
Current assignee: Hefei Design And Research Institute Of Coal Industry LLC
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2021-08-24
Anticipated expiration: 2030-12-02

Abstract

The utility model provides a roller screen, which relates to the technical field of screening equipment and comprises a machine body, roller components and a lifting mechanism, wherein a plurality of roller components are arranged in parallel and at intervals along the length direction of the machine body between a feed port and a discharge port of the machine body to form a screen surface; the lifting mechanism is arranged on the machine body, at least one lifting mechanism is connected with one roller component, and the lifting mechanism is suitable for pushing the roller component to reciprocate along the vertical direction. The utility model discloses well a plurality of roller bearing subassemblies are along the length direction parallel arrangement and the interval arrangement formation sifter of organism between feed inlet and discharge gate, can sieve the supplied materials through the sifter, through set up elevating system on the organism, elevating system promotes roller bearing subassembly along vertical direction reciprocating motion for roller bearing subassembly can stir the supplied materials on the sifter, reduces the dwell time of supplied materials on the sifter, thereby reduces roller bearing subassembly jamming risk, improves screening efficiency.

Description

Roller screen

Technical Field

The utility model relates to a screening equipment technical field particularly, relates to a roller screen.

Background

Roller sifter is the common equipment that enterprises such as colliery, thermal power factory, steel plant or coke-oven plant are used for sieving coal or other raw and other materials, forms the sifting surface by many sieve axle interval arrangements usually, will wait that the supplied material of sieving is carried to the sifting surface on from one end, and the supplied material that the volume is less drops to sifting surface below from the clearance between the sieve axle, and the great supplied material of volume rolls through the sieve axle and carries to the sifting surface other end and get into subsequent handling to the supplied material of equidimension not sieves.

In the prior art, the sieve shaft forming the sieve surface can only rotate, incoming materials to be sieved move on the sieve surface through rotation of the sieve shaft and self gravity, the incoming materials with large size on the sieve surface cannot leave quickly, the sieving efficiency is influenced, meanwhile, large incoming materials with different shapes stay on the sieve surface for a long time, the sieve shaft is easy to generate clamping stagnation, the phenomena of equipment overload tripping and the like are caused, and the safe operation of the equipment is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem how to reduce roller screen jamming risk, improve screening efficiency.

In order to solve the above problem, the utility model provides a roller screen, include:

the machine body is provided with a feeding hole and a discharging hole;

the rolling shaft assemblies are arranged between the feeding hole and the discharging hole, the rolling shaft assemblies are arranged in plurality, and the rolling shaft assemblies are arranged in parallel and arranged at intervals in the length direction of the machine body to form a screen surface;

the lifting mechanism is arranged on the machine body, at least one lifting mechanism is connected with one roller assembly, and the lifting mechanism is suitable for pushing the roller assembly to reciprocate along the vertical direction.

Optionally, the roller assembly includes a roller and a power member, the roller is in driving connection with the power member, and the roller is adapted to rotate under the driving of the power member.

Optionally, the lifting mechanism includes a first telescopic piece, the first telescopic piece is arranged along the vertical direction, one end of the first telescopic piece is connected with the machine body, and the other end of the first telescopic piece is connected with the roller.

Optionally, the lifting mechanism further comprises a base, one end of the base is connected with the machine body, the other end of the base is connected with the first telescopic piece, and the bases are sequentially arranged in a stepped manner at intervals in the length direction of the machine body.

Optionally, a plurality of screen pieces are arranged on the roller, and the plurality of screen pieces are arranged at intervals in the width direction of the machine body.

Optionally, in the width direction of the machine body, the sieve sheets on the adjacent rollers are staggered.

Optionally, still include stock stop, stock stop set up the feed inlet with between the sifter, stock stop is suitable for to remove with the adjustment gets into the volume of receiving of sifter.

Optionally, the striker mechanism includes striker plate, second extensible member and round pin axle, the striker plate is followed the width direction of organism sets up, the second extensible member is followed the length direction of organism sets up, the one end of striker plate with the organism passes through round pin hub connection, the striker plate is suitable for wind under the drive of second extensible member the round pin axle rotates.

Optionally, a waist-shaped hole is formed in the striker plate, and the second telescopic piece is connected with the striker plate through the waist-shaped hole.

Optionally, the second telescopic part is provided with a detection device, the detection device is arranged on the machine body and is suitable for detecting the pressure of the screen surface to start and stop the second telescopic part.

Compared with the prior art, the utility model, following beneficial effect has: a plurality of roller bearing subassemblies are along the length direction parallel arrangement and the interval arrangement of organism between feed inlet and discharge gate and are formed the sifter, can sieve the supplied materials through the sifter, through set up elevating system on the organism, at least one elevating system is connected with a roller bearing subassembly, elevating system promotes roller bearing subassembly along vertical direction reciprocating motion, make the roller bearing subassembly can stir the supplied materials on the sifter, reduce the dwell time of supplied materials on the sifter, thereby reduce the jamming risk of roller bearing subassembly, improve screening efficiency.

Drawings

Fig. 1 is a schematic structural view of a roller screen in an embodiment of the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1 according to an embodiment of the present invention;

fig. 3 is an enlarged view of the embodiment of the present invention at B in fig. 1;

fig. 4 is a schematic structural view of a screen surface in an embodiment of the present invention.

Description of reference numerals:

1-machine body, 11-feeding hole, 12-discharging hole, 121-first discharging hole, 122-second discharging hole, 123-third discharging hole, 2-rolling shaft component, 21-rolling shaft, 211-screening sheet, 22-power part, 3-screening surface, 4-lifting mechanism, 41-first telescopic part, 42-base, 5-material stopping mechanism, 51-material stopping plate, 511-waist-shaped hole, 52-second telescopic part, 53-pin shaft and 6-detection device.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be understood that the forward direction of "X" in the drawings represents the forward direction, and correspondingly, the reverse direction of "X" represents the rearward direction; the forward direction of "Y" represents the left direction, and correspondingly, the reverse direction of "Y" represents the right direction; the forward direction of "Z" represents the upward direction, and correspondingly, the reverse direction of "Z" represents the downward direction, and the terms "X", "Y", "Z", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings of the specification, and are merely for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Roller sifter is the common equipment that enterprises such as colliery, thermal power factory, steel plant or coke-oven plant are used for sieving coal or other raw and other materials, forms the sifting surface by many sieve axle interval arrangements usually, will wait that the supplied material of sieving is carried to the sifting surface on from one end, and the supplied material that the volume is less drops to sifting surface below from the clearance between the sieve axle, and the great supplied material of volume rolls through the sieve axle and carries to the sifting surface other end and get into subsequent handling to the supplied material of equidimension not sieves. In the prior art, the sieve shaft forming the sieve surface can only rotate, incoming materials to be sieved move on the sieve surface through rotation of the sieve shaft and self gravity, the incoming materials with large size on the sieve surface cannot leave quickly, the sieving efficiency is influenced, meanwhile, large incoming materials with different shapes stay on the sieve surface for a long time, the sieve shaft is easy to generate clamping stagnation, the phenomena of equipment overload tripping and the like are caused, and the safe operation of the equipment is influenced.

To solve the above problem, as shown in fig. 1 and 4, an embodiment of the present invention provides a roller screen, including: the machine body 1 is provided with a feeding hole 11 and a discharging hole 12; the rolling shaft components 2 are arranged between the feed inlet 11 and the discharge outlet 12, the rolling shaft components 2 are provided with a plurality of rolling shaft components 2, and the rolling shaft components 2 are arranged in parallel and arranged at intervals in the length direction of the machine body 1 to form a screen surface 3; the lifting mechanism 4 is arranged on the machine body 1, at least one lifting mechanism 4 is connected with one roller assembly 2, and the lifting mechanism 4 is suitable for pushing the roller assembly 2 to reciprocate along the vertical direction.

As shown in fig. 1 and 4, the cross-sectional shape of the machine body 1 may be rectangular, trapezoidal, circular, or any combination thereof, the feed inlet 11 may be disposed at the top or side of the machine body 1, the discharge outlet 12 may be disposed at the bottom or side of the machine body 1, the feed inlet 11 and the discharge outlet 12 may be triangular, rectangular, polygonal, circular, or any combination thereof, the plurality of roller assemblies 2 are disposed in parallel and at intervals along the length direction of the machine body 1 to form the screening surface 3, the screening surface 3 may be disposed horizontally or inclined at a certain angle to the horizontal plane, one or more lifting mechanisms 4 may be disposed, and the lifting mechanisms 4 may be disposed at the side of the roller assemblies 2 along the width direction of the machine body 1 or at the middle position or any position of the roller assemblies 2.

In this embodiment, the machine body 1 is a trapezoidal box structure, and is composed of a frame and a housing, a feed inlet 11 is disposed on the right side of the top of the machine body 1, three discharge outlets 12 are disposed on the bottom of the machine body 1, from left to right, a first discharge outlet 121, a second discharge outlet 122 and a third discharge outlet 123 are respectively disposed, the first discharge outlet 121 is disposed on the left side of the end of the screen surface 3 and is used for discharging incoming materials with large volume, the second discharge outlet 122 is disposed below the screen surface 3 and is used for discharging incoming materials with small volume, the third discharge outlet 123 is disposed on the right side of the start end of the screen surface 3 and is used for shunting incoming materials exceeding the screening capacity, the screen surface 3 and the horizontal plane are obliquely disposed at a certain angle, a plurality of the lifting mechanisms 4 are disposed, in the width direction of the machine body 1, each roller assembly 2 is connected with a lifting mechanism 4 near the left end and the right end, so that each roller assembly 2 can reciprocate along the vertical direction, 3 each homoenergetic of sifter agitates the supplied materials, and screening effect is better, and elevating system 4 sets up at both ends for reciprocating motion is more synchronous along vertical direction at 2 both ends of roller bearing subassembly, can reduce the jamming, improves screening efficiency, and feed inlet 11 and discharge gate 12 set up from top to bottom, and sifter 3 personally submits certain angle slope setting with the level, can make supplied materials make full use of self gravity and sieve on sifter 3, and screening efficiency is higher.

As shown in fig. 1 and 4, the longitudinal direction of the machine body 1 is the direction along the X axis, the width direction of the machine body 1 is the direction along the Y axis, and the vertical direction is the direction along the Z axis.

Like this, a plurality of roller bearing assembly 2 are along organism 1's length direction parallel arrangement and interval arrangement formation sifter 3 between feed inlet 11 and discharge gate 12, can sieve the supplied materials through sifter 3, through set up elevating system 4 on organism 1, at least one elevating system 4 is connected with a roller bearing assembly 2, elevating system 4 promotes roller bearing assembly 2 along vertical direction reciprocating motion, make roller bearing assembly 2 can stir the supplied materials on sifter 3, reduce the dwell time of supplied materials on sifter 3, thereby reduce roller bearing assembly 2 jamming risk, improve screening efficiency.

Optionally, the roller assembly 2 comprises a roller 21 and a power member 22, the roller 21 is in driving connection with the power member 22, and the roller 21 is adapted to rotate under the driving of the power member 22.

As shown in fig. 1 and 4, the power member 22 may adopt various types of motors as required, the roller 21 may be directly connected to the power member 22 in a driving manner, or may be connected to the power member 22 through a connecting member such as a timing belt or a timing wheel, and each roller assembly 2 may be provided with one power member 22 separately, or a plurality of roller assemblies 2 may share one power member 22 through a connecting member.

In this embodiment, roller 21 of every roller bearing subassembly 2 all sets up a motor alone, roller 21 sets up and passes through the coupling joint with the output shaft coaxial of motor, every roller bearing subassembly 2 sets up the motor alone, make each roller bearing subassembly 2 between each mutually noninterference, roller bearing 21 power is more sufficient, even the operation that does not influence whole equipment even the fault of individual motor, can improve equipment screening efficiency, and simultaneously, the motor is direct to be connected with roller bearing 21, can reduce the equipment volume, reduce the kinetic energy loss, it is more energy-concerving and environment-protective.

Like this, use the axis to rotate as the axle through power component 22 drive roller 21, can promote supplied materials along sifting surface 3 forward movement, reduce the dwell time of supplied materials on sifting surface 3 to reduce roller assembly 2 jamming risk, improve screening efficiency.

Optionally, the lifting mechanism 4 includes a first telescopic member 41, the first telescopic member 41 is disposed along the vertical direction, one end of the first telescopic member 41 is connected to the machine body 1, and the other end of the first telescopic member 41 is connected to the roller 21.

As shown in fig. 1, the first telescopic member 41 may be a hydraulic cylinder, an air cylinder or an electric cylinder, the first telescopic members 41 of the plurality of lifting mechanisms 4 may be separately arranged or arranged in parallel, and the first telescopic members 41 of the lifting mechanisms 4 may be synchronously telescopic, sequentially telescopic with time delay or telescopic as required.

In this embodiment, the first telescopic member 41 is a hydraulic cylinder, a fixed end of the hydraulic cylinder is connected to the machine body 1, bearings are respectively disposed at positions of the roller near left and right sides, inner rings of the bearings rotate along with the roller, a movable end of the hydraulic cylinder is connected to an outer ring of the bearing at a side end of the roller 21, the hydraulic cylinders of the plurality of lifting mechanisms 4 are arranged in parallel through a pipeline (not shown), electromagnetic valves (not shown) are respectively disposed on branches leading to the respective hydraulic cylinders, the respective electromagnetic valves are electrically connected to a control box (not shown), the control box sends an instruction to open or close the electromagnetic valves, so that the hydraulic cylinders are telescopic, preferably, the hydraulic cylinders of the respective lifting mechanisms 4 are sequentially telescopic from back to front, and the circulation is performed, so that incoming materials can be pushed to roll forward, and the risk of jamming of the roller assembly 2 is reduced.

Like this, promote roller 21 along vertical direction reciprocating motion through setting up first extensible member 41 for roller 21 can stir the supplied materials, reduces the dwell time of supplied materials on sifter 3, thereby reduces roller 21 jamming risk, improves screening efficiency.

Optionally, the lifting mechanism 4 further includes a base 42, one end of the base 42 is connected to the machine body 1, the other end of the base 42 is connected to the first extensible member 41, and the plurality of bases 42 are sequentially arranged in a step shape at intervals in the length direction of the machine body 1.

As shown in fig. 1, the base 42 may be in the form of a pad, a bracket, or the like, and may be connected to the machine body 1 by welding, riveting, bolting, or integral molding, or the like, and the first extensible member 41 may also be connected to the base 42 by welding, riveting, bolting, or the like, and the heights of the bases 42 of the lifting mechanisms 4 may be the same or may be set as needed.

In this embodiment, the base 42 is a bracket welded by angle steel, the base 42 is connected with the machine body 1 through bolts, the first telescopic parts 41 are also installed on the base 42 through bolts, because the base 42 is installed on a platform at the same height on the machine body 1, and the screen surface 3 and the horizontal plane are inclined at a certain angle, therefore, the base 42 of each lifting mechanism 4 is sequentially arranged at intervals in a ladder shape from front to back, and therefore, the telescopic amount of the first telescopic parts 41 of each lifting mechanism 4 can be kept consistent and is convenient to control.

Like this, through setting up the first extensible member 41 of base 42 easy to assemble, a plurality of bases 42 are the echelonment and set up the part that makes the first extensible member 41 of each elevating system 4 can adopt the same model at interval in proper order, make things convenient for maintenance, and the commonality is stronger, can save the cost.

Optionally, a plurality of screen sheets 211 are disposed on the roller 21, and the plurality of screen sheets 211 are spaced apart from each other in the width direction of the machine body 1.

As shown in fig. 4, the shape of the screen sheet 211 may be triangular, rectangular, polygonal, circular or a combination thereof, and the plurality of screen sheets 211 may be uniformly spaced or irregularly spaced in the width direction of the machine body 1, preferably, in this embodiment, the screen sheet 211 is a circular screen sheet 211, the circular screen sheet 211 is coaxially disposed with the roller 21, and the plurality of screen sheets 211 are uniformly spaced in the width direction of the machine body 1, so that the mesh size of the screen surface 3 is more uniform, and the screening quality can be improved.

In this way, by providing a plurality of screen pieces 211 on the roller 21 at intervals in the width direction of the machine body 1, the mesh of the screen surface 3 can be encrypted, and the screening quality can be improved.

Alternatively, the screen pieces 211 on the adjacent rollers 21 are staggered in the width direction of the machine body 1.

As shown in fig. 4, the sieve sheets 211 on the adjacent rollers 21 are arranged in a staggered manner, where the staggered arrangement means that a certain sieve sheet 211 on one roller 21 is arranged between two adjacent sieve sheets 211 on the other adjacent roller 21, and the sieve sheet 211 may be arranged at the center between two adjacent sieve sheets 211 on the other adjacent roller 21, or may be arranged at any position between two adjacent sieve sheets 211, and preferably, in this embodiment, the sieve sheet 211 is arranged at the center between two adjacent sieve sheets 211 on the other adjacent roller 21, so that the size of the mesh of the sieve surface 3 is more uniform, and the sieving quality can be improved.

In this way, the screen mesh of the screen surface 3 can be encrypted by arranging the screen pieces 211 on the adjacent rollers 21 in a staggered manner, and the screening quality is improved.

Optionally, the roller screen further comprises a material blocking mechanism 5, the material blocking mechanism 5 is arranged between the feeding hole 11 and the screen surface 3, and the material blocking mechanism 5 is suitable for moving to adjust the material feeding amount entering the screen surface 3.

As shown in fig. 1, a material blocking mechanism 5 for adjusting the amount of the material coming from the screen surface 3 is further disposed between the feeding port 11 and the screen surface 3, the material blocking mechanism 5 can slide along the length direction of the machine body 1 to adjust the size of the feeding port, so as to adjust the amount of the material coming from the screen surface 3, and can also adopt one end to fix on the machine body 1 and the other end to swing to adjust the flow direction of the incoming material, so as to adjust the amount of the material coming from the screen surface 3.

Like this, through set up stock stop 5 between feed inlet 11 and sifter 3, can adjust the volume of coming the material that gets into sifter 3, prevent to come the too big screen surface 3 overload damage equipment that causes of volume of material.

Optionally, the striker mechanism 5 includes a striker plate 51, a second extensible member 52 and a pin shaft 53, the striker plate 51 is disposed along the width direction of the machine body 1, the second extensible member 52 is disposed along the length direction of the machine body 1, one end of the striker plate 51 is connected with the machine body 1 through the pin shaft 53, and the striker plate 51 is suitable for rotating around the pin shaft 53 under the driving of the second extensible member 52.

As shown in fig. 1 and 2, the striker plate 51 may have a triangular shape, a rectangular shape, a polygonal shape, a circular shape, or a combination thereof, the striker plate 51 may be made of a common metal plate, wood plate, or plastic plate, or may have a plate-like structure with a frame, and the second telescopic member 52 may be a hydraulic cylinder, an air cylinder, or an electric cylinder.

In this embodiment, the striker plate 51 is a plate-shaped structure having a frame, the plate-shaped structure having the frame is more robust and has a certain thickness, and is conveniently connected to the machine body 1 and the second extensible members 52, the striker plate 51 is disposed along the width direction of the machine body 1, the upper end of the striker plate 51 is provided with a shaft hole along the width direction of the machine body 1, a striker plate mounting seat is disposed below the feed port 11 on the machine body 1, the upper end of the striker plate 51 is installed on the striker plate mounting seat by passing a pin shaft 53 through the shaft hole, the second extensible members 52 are two, the two second extensible members 52 are respectively disposed on the left and right sides of the rear end of the machine body 1 and are respectively connected to the left and right sides of the striker plate 51, the two second extensible members 52 are both provided with electric cylinders, the left and right sides of the rear end of the machine body 1 are both provided with electric cylinder supports, the fixed ends of the electric cylinders are installed, the movable end of the electric cylinder is connected with the striker plate 51, and the electric cylinder drives the striker plate 51 to rotate around the pin shaft 53.

Like this, the one end of striker plate 51 is connected with organism 1 through round pin axle 53, and second extensible member 52 drive striker plate 51 rotates around round pin axle 53, can adjust the volume of getting into the material of sifter 3, prevents to come the too big screen surface 3 overload damage equipment that causes of volume of material.

Optionally, a kidney-shaped hole 511 is formed in the striker plate 51, and the second telescopic member 52 is connected with the striker plate 51 through the kidney-shaped hole 511.

As shown in fig. 1 and 3, in this embodiment, the frames on the left and right sides of the striker plate 51 are provided with a waist-shaped hole 511, the waist-shaped hole 511 is arranged along the length direction of the striker plate 51, and the movable end of the second extensible member 52 is connected with a latch, which is inserted into the waist-shaped hole 511 and can slide in the waist-shaped hole 511.

Like this, through set up waist type hole 511 on striker plate 51, make things convenient for second extensible member 52 to be connected with striker plate 51, waist type hole 511 design is simple, and it is effectual to slide, can simplify the structure of striker mechanism 5, practices thrift the cost.

Optionally, the roller screen further comprises a detection device 6, the detection device 6 is disposed on the machine body 1, and the detection device 6 is adapted to detect the pressure of the screen surface 3 to start and stop the second telescopic member 52.

As shown in fig. 1, in this embodiment, a detection device 6 is further disposed on the machine body 1 below the base 42 of the lifting mechanism 4, the detection device 6 is a pressure sensor, and the pressure sensor is used to detect the pressure of the screen surface 3 and transmit the detection information to a control box (not shown) to start and stop the second expansion part 52, so as to adjust the amount of the incoming material entering the screen surface 3.

Like this, through set up the pressure that detection device 6 detected sifter 3 on organism 1, can make 5 adjustments of stock stop get into the volume of coming of sifter 3 to prevent to come the too big screen surface 3 overload damage equipment that causes of volume of material.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims

1. A roller screen, comprising:

the device comprises a machine body (1), wherein the machine body (1) is provided with a feeding hole (11) and a discharging hole (12);

the roller assemblies (2) are arranged between the feed port (11) and the discharge port (12), a plurality of roller assemblies (2) are arranged, and the plurality of roller assemblies (2) are arranged in parallel and arranged at intervals in the length direction of the machine body (1) to form a screen surface (3);

the lifting mechanism (4) is arranged on the machine body (1), at least one lifting mechanism (4) is connected with one roller assembly (2), and the lifting mechanism (4) is suitable for pushing the roller assembly (2) to reciprocate along the vertical direction.

2. A roller screen according to claim 1, characterized in that the roller assembly (2) comprises a roller (21) and a power member (22), the roller (21) being drivingly connected to the power member (22), the roller (21) being adapted to be rotated by the power member (22).

3. A roller screen according to claim 2, characterized in that the lifting mechanism (4) comprises a first telescopic member (41), the first telescopic member (41) being arranged in a vertical direction, one end of the first telescopic member (41) being connected to the machine body (1) and the other end of the first telescopic member (41) being connected to the roller (21).

4. The roller screen according to claim 3, characterized in that the lifting mechanism (4) further comprises a base (42), one end of the base (42) is connected with the machine body (1), the other end of the base (42) is connected with the first extensible member (41), and the plurality of bases (42) are sequentially arranged in a stepped manner at intervals in the length direction of the machine body (1).

5. A roller screen according to claim 2, characterized in that the roller (21) is provided with a plurality of screen sheets (211), and the plurality of screen sheets (211) are arranged at intervals in the width direction of the machine body (1).

6. A roller screen according to claim 5, characterized in that the screening sheets (211) on adjacent rollers (21) are staggered in the width direction of the machine body (1).

7. A roller screen according to any one of claims 1 to 6, characterized in that it further comprises a striker mechanism (5), said striker mechanism (5) being arranged between the feed opening (11) and the screen surface (3), said striker mechanism (5) being adapted to be moved to adjust the incoming material amount entering the screen surface (3).

8. A roller screen according to claim 7, characterized in that the striker mechanism (5) comprises a striker plate (51), a second telescopic member (52) and a pin shaft (53), the striker plate (51) is arranged along the width direction of the machine body (1), the second telescopic member (52) is arranged along the length direction of the machine body (1), the striker plate (51) is connected with the machine body (1) through the pin shaft (53), and the striker plate (51) is adapted to rotate around the pin shaft (53) under the driving of the second telescopic member (52).

9. A roller screen according to claim 8, characterized in that said striker plate (51) is provided with a kidney-shaped hole (511), and said second telescopic element (52) is connected to said striker plate (51) through said kidney-shaped hole (511).

10. A roller screen according to claim 8, characterized in that it further comprises a detection device (6), said detection device (6) being arranged on said machine body (1), said detection device (6) being adapted to detect the pressure of said screening surface (3) to activate or deactivate said second telescopic member (52).