CN115318637B

CN115318637B - Horizontal airflow screen

Info

Publication number: CN115318637B
Application number: CN202211116285.6A
Authority: CN
Inventors: 连千荣
Original assignee: Ningbo Ekm New Material Co ltd
Current assignee: Ningbo Ekm New Material Co ltd
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2023-05-30
Anticipated expiration: 2042-09-14
Also published as: CN115318637A

Abstract

The application relates to a horizontal air flow screen, including: the screening bin comprises a screening bin shell, wherein a cavity is formed in the screening bin shell, a partition plate is arranged in the screening bin shell to divide the cavity into a fine screening bin and a coarse screening bin, a communication channel for communicating the fine screening bin with the coarse screening bin is arranged on the partition plate, and a feed channel for communicating the fine screening bin is arranged at one end of the screening bin shell; the two ends of the fine screening cylinder are connected with the communication channel and the feeding channel in a sealing way; the expansion rollers are arranged on the inner sides of the fine screening barrels, one ends of the expansion rollers penetrate through the fine screening barrels and are connected to the screening bin shell and are located in the circumferential direction of the feeding channel, the other ends of the expansion rollers are used for abutting the fine screening barrels on the partition plates, and one ends of the expansion rollers, which are close to the feeding channel, are provided with first limit baffles so as to tightly abut the fine screening barrels on the inner wall, located in the circumferential direction of the feeding channel, of the screening bin shell; and the expansion driving mechanism is connected to the screening bin shell and used for driving the expansion roller to move in a direction away from the feeding channel. The application can adjust the aperture of the fine screening holes.

Description

Horizontal airflow screen

Technical Field

The application relates to the field of screening devices, in particular to a horizontal airflow screen.

Background

The air flow screen is a screening device for screening two materials with different particle sizes, generally, a horizontal air flow screen is provided with a feeding mechanism for spiral conveying in a screening bin, the materials are conveyed into a screen cylinder from a hopper through spiral conveying, and along with continuous rotation of a splitter blade, the materials are continuously updated and pushed in a screen box, fine materials are screened out through a fine screening cylinder and discharged from a fine material port, and coarse materials are screened out through a coarse screening cylinder and discharged from a coarse material port.

In general, when sieving a material having a non-uniform thickness, the pore diameter of the fine sieving cylinder is usually required to be adjusted, but in general, the fine sieving cylinder needs to be removed and replaced as a whole, which results in low efficiency.

Disclosure of Invention

In order to facilitate adjustment of the aperture of the fine screening drum, the present application provides a horizontal air flow screen.

The application provides a horizontal air current sieve adopts following technical scheme:

a horizontal air flow screen comprising:

the screening bin comprises a screening bin shell, wherein a cavity is formed in the screening bin shell, a partition plate is arranged in the screening bin shell to divide the cavity into a fine screening bin and a coarse screening bin, a communication channel for communicating the fine screening bin with the coarse screening bin is arranged on the partition plate, and a feed channel for communicating the fine screening bin is arranged at one end of the screening bin shell;

the fine screening cylinder is made of elastic materials, two ends of the fine screening cylinder are respectively and hermetically connected with the communication channel and the feeding channel, and a plurality of fine screening holes are formed in the fine screening cylinder;

the expansion rollers are arranged on the inner sides of the fine screening barrels, one ends of the expansion rollers penetrate through the fine screening barrels and are connected to the screening bin shell and are located in the circumferential direction of the feeding channel, the other ends of the expansion rollers are used for abutting the fine screening barrels against the partition plates, and a first limit baffle is arranged at one end, close to the feeding channel, of each expansion roller so as to abut the fine screening barrels against the inner wall, located in the circumferential direction of the feeding channel, of the screening bin shell;

and the expansion driving mechanism is connected to the screening bin shell and used for driving the expansion roller to move in a direction away from the feeding channel.

Through adopting above-mentioned technical scheme, the fine screening section of thick bamboo makes it can have certain deformability through the setting of elastic material, and makes the whole fine screening section of thick bamboo can be opened through the setting of expansion roller and expansion actuating mechanism to make the sieve mesh on the fine screening section of thick bamboo also can be enlarged, thereby make the diameter increase of the granule that the fine screening section of thick bamboo can screen out, thereby conveniently adjust, need not to wholly change the fine screening section of thick bamboo.

Preferably, one end of the expansion roller, which deviates from the first limit baffle, is provided with a second limit baffle parallel to the partition board, a plurality of balls are arranged on the second limit baffle, the balls are in butt joint with the inner wall of the fine screening barrel, a plurality of limit grooves for limiting the movement track of the balls one by one are arranged on the partition board, and when the expansion driving mechanism drives the expansion roller to move in a direction away from the feeding channel, the balls are always limited and slide in the same limit groove.

Through adopting above-mentioned technical scheme, this kind of mode can be spacing to the both ends of expansion roller for expansion actuating mechanism is at the in-process of drive expansion roller one end, and the expansion roller is whole to be removed along given direction, simultaneously, because the other end of expansion roller needs to prop up fine screening section of thick bamboo part on the baffle, the frictional force when the other end contact of expansion roller also can be reduced to the setting mode of ball.

Preferably, the expansion driving mechanism comprises a plurality of rotating discs which are connected outside the screening bin shell and a driving device for driving the rotating discs to rotate, the rotating shaft centers of the rotating discs are located outside the feeding channels, the expansion rollers penetrate through the screening bin shell and are connected to the outer edges of the rotating discs, and limiting channels for the expansion rollers to penetrate through and slide are arranged on the screening bin shell.

Through adopting above-mentioned technical scheme, this kind of mode makes through rotating the rolling disc and makes the expansion roller remove along curved direction, and simultaneously corresponds, and the orbit of spacing groove also can correspond to set up to curved orbit for the arc at the spacing groove also can be used for supporting the gravity of a part, thereby reduces the condition that leads to the expansion roller to take place to slide because of the effect of gravity.

Preferably, the driving device comprises an annular rotary table rotationally connected outside the screening bin shell, the annular rotary table is sleeved outside the feeding mechanism and is concentric with the feeding channel, a plurality of rotary tables are uniformly distributed in the circumferential direction of the annular rotary table, the outer edge of each rotary table is provided with an outer tooth surface meshed with the annular rotary table, and the screening bin shell is provided with a locking device for locking the annular rotary table.

Through adopting above-mentioned technical scheme, this kind of setting can make at the in-process of rotating annular carousel, all can rotate in step with a plurality of rotating disk of annular carousel meshing to make all expansion rollers and the connection structure that control fine screening section of thick bamboo expansion all can move in step, make the circumference of fine screening section of thick bamboo all can be by even expansion.

Preferably, the fine screening cylinder comprises a first extending part extending into the feeding channel and abutting against the inner wall of the feeding channel and a first flanging part connected with the first extending part and extending out of the screening bin shell, the first flanging part is clamped between the annular rotary disc and the screening bin shell, the locking device comprises a plurality of limiting parts arranged on the periphery of the annular rotary disc and locking parts arranged on the limiting parts, the limiting parts are used for limiting the annular rotary disc, the first flanging part and the screening bin shell to be separated from each other, and the locking parts are used for tightly pressing the annular rotary disc on the first flanging part or loosening the annular rotary disc.

Through adopting above-mentioned technical scheme, this kind of mode not only can seal fine screening section of thick bamboo and feed mechanism, also can make the granule material can not get into the fine screening storehouse through the junction between fine screening section of thick bamboo and the screening storehouse casing. Furthermore, because the whole fine screening cylinder is made of elastic materials, a certain damping force can be applied to the annular rotary table, and the state of the annular rotary table can be limited by the mode that the annular rotary table is tightly pressed by the locking piece, and the sealing effect between the fine screening cylinder and the screening bin shell can be improved.

Preferably, the outer edges of the first limit baffle and the second limit baffle are arc-shaped, wherein the limit channel is always located in the projection of the first limit baffle in the process that the expansion roller slides in the limit channel.

Through adopting above-mentioned technical scheme, spacing passageway is arranged in the projection of first limit baffle all the time and sets up the mode, can make first limit baffle can carry out the cooperation with the fine screening section of thick bamboo and seal spacing passageway to make fine screening storehouse and external can not directly communicate through spacing passageway.

Preferably, the expanding roller comprises a windward section positioned between the first limit baffle and the second limit baffle, and the cross section of the windward section is in streamline arrangement.

Through adopting above-mentioned technical scheme for the air current vortex condition in the fine screening section of thick bamboo becomes less in work engineering for the screening efficiency is difficult to by the setting of expanding roller and is influenced.

Preferably, the expansion roller further comprises a connecting section connected with the rotating disc, the windward section is rotationally connected with the connecting section and the windward section is rotationally connected with the second limit baffle, an adjusting column penetrating through the connecting section is coaxially connected to the windward section, and damping connection is achieved between the adjusting column and the connecting section.

Through adopting above-mentioned technical scheme, this kind of setting makes after moving the expansion roller through rotating the rolling disc, can change the relative state of windward section in the bucket through rotating the adjusting column to make the expansion roller after the adjustment, windward section can all be adjusted to a state that is less in the working process resistance all the time.

Preferably, the fine screening cylinder is provided with a second flanging part which passes through the communication channel and extends to the coarse screening bin, the coarse screening cylinder is arranged in the coarse screening bin and comprises a flange part, a coarse screening net part and a top cover part which are coaxially and sequentially connected, a plurality of hollow limit posts are circumferentially arranged on the flange part, the top cover part is connected with a connecting sheet which radially extends and is connected with the limit posts, the flange part tightly presses the second flanging part on the partition plate, a fastening bolt connected with the partition plate is arranged in the limit posts in a penetrating manner, and the end part of the fastening bolt is in butt joint with the end part of the limit post.

Through adopting above-mentioned technical scheme, this kind of setting method also can further improve the sealed effect of the fine screening section of thick bamboo other end for the space in the fine screening section of thick bamboo can not directly communicate with the fine screening storehouse.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the step of synchronously expanding the expansion rollers is driven by rotating the annular rotary table, so that the whole fine screening cylinder can be expanded, and the sieve holes on the fine screening cylinder can be enlarged, so that the diameter of particles which can be screened out by the fine screening cylinder is increased, the fine screening cylinder is convenient to adjust, and the fine screening cylinder does not need to be replaced integrally;

2. the sealing effect is better;

3. the operation steps are simple.

Drawings

Fig. 1 is a cross-sectional view of a horizontal air flow screen.

FIG. 2 is a schematic view of a partial cross-sectional structure of a fine screen cartridge mated with an expansion roller.

Fig. 3 is a schematic view of the configuration of the expanding roller in cooperation with the driving means.

Fig. 4 is a schematic view in partial cross-section of a screening house housing showing in particular the structure of the partition towards the side of the fine screening house.

Fig. 5 is a schematic structural view of the driving device on the screening bin housing.

Fig. 6 is a schematic view of the structure of the expanding roller.

Fig. 7 is an exploded view of the annular turntable, feed tube and screening bin housing.

Fig. 8 is a schematic view of the structure of the installation place of the coarse screening cartridge.

Fig. 9 is an exploded view of a coarse screening cartridge with its mounting.

Reference numerals illustrate: 1. a screening bin housing; 2. a feed mechanism; 11. a fine screening bin; 12. coarse screening bin; 13. a communication passage; 14. a feed channel; 15. a partition plate; 3. a fine screening cylinder; 4. a coarse screening cylinder; 21. conveying the rotary main shaft; 5. an expanding roller; 6. an expansion driving mechanism; 51. a first limit baffle; 52. the second limit baffle plate; 53. a ball; 16. a limit groove; 61. a rotating disc; 62. a driving device; 17. a limiting channel; 621. an annular turntable; 54. a windward section; 55. a connection section; 56. an adjusting column; 63. a locking device; 22. a feed pipe; 631. a limiting piece; 632. a locking member; 31. a first extension; 32. a first burring part; 33. a second extension; 34. a second burring part; 41. a flange portion; 42. a coarse screen section; 43. a top cover part; 44. a limit column; 45. and a connecting sheet.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-9.

The embodiment of the application discloses a horizontal airflow screen. Referring to fig. 1, the horizontal air flow screen comprises a screening bin housing 1 and a feeding mechanism 2 arranged at one end of the screening bin housing 1, wherein an opening for adding particles is formed above the feeding mechanism 2 and is communicated into the screening bin housing 1. The screening bin housing 1 is internally provided with a cavity, the cavity is divided into a fine screening bin 11 and a coarse screening bin 12 through a partition plate 15, a communication channel 13 for communicating the fine screening bin 11 with the coarse screening bin 12 is arranged on the partition plate 15, and a feeding channel 14 for communicating the fine screening bin 11 with the feeding mechanism 2 is arranged on the screening bin housing 1 and positioned on one side of the fine screening bin 11 far away from the coarse screening bin 12. The screening bin comprises a screening bin shell 1, a fine screening cylinder 3, a coarse screening cylinder 4, a conveying rotary main shaft 21, a spiral section and a plurality of flow dividing blades, wherein two ends of the fine screening cylinder 3 are respectively communicated with a feeding mechanism 2 and a coarse screening cylinder 12, the coarse screening cylinder 4 is arranged in the coarse screening cylinder 12, the coarse screening cylinder 4 is connected to the screening bin shell 1, one end of the feeding mechanism 2 is communicated with the fine screening cylinder 3, the conveying rotary main shaft 21 extends into the fine screening cylinder 3, one end of the conveying rotary main shaft 21, close to the feeding mechanism 2, is provided with the spiral section, one side, far away from the feeding mechanism 2, is circumferentially provided with the plurality of flow dividing blades, under the action of the conveying rotary main shaft 21, materials are continuously conveyed into the fine screening cylinder 3 through the spiral section, then the materials are turned up through the continuous stirring of the flow dividing blades, finer particles are screened out by the sieve holes on the fine screening cylinder 3 and enter the fine screening cylinder 11, and the rest materials are continuously pushed forward into the coarse screening cylinder 4 and are screened into the coarse screening cylinder 12.

Referring to fig. 1 and 2, the fine screening cartridge 3 is made of an elastic material and is provided with a plurality of fine screening holes in the circumferential direction thereof, an expansion roller 5 for expanding the fine screening cartridge 3 is provided in the fine screening cartridge 3, and an expansion driving mechanism 6 for driving the expansion roller 5 to move to expand the fine screening cartridge 3 is provided outside the screening cartridge housing 1. The expanding roller 5 is provided with a plurality of and all is located the inboard of fine screening section of thick bamboo 3, and expanding roller 5 one end runs through fine screening section of thick bamboo 3 and slides and connect on screening storehouse casing 1, and wherein, expanding roller 5 one end is located the circumference of feed channel 14 with screening storehouse casing 1 part that slides and connect, and the other end extends to the direction that coarse screening storehouse 12 is located and with fine screening section of thick bamboo 3 part butt on baffle 15. The expanding roller 5 is provided with a first limit baffle plate 51 which is positioned in the fine screening barrel 3, and the first limit baffle plate 51 is arranged on one side close to the feeding mechanism 2 so as to tightly prop the fine screening barrel 3 against the inner wall of the screening bin shell 1, which is positioned in the circumferential direction of the feeding channel 14.

Here, during the movement of the expansion roller 5 driven by the expansion driving mechanism 6, the expansion roller 5 moves in a direction away from the feed passage 14, so that the inner diameter of the fine screening cylinder 3 is enlarged, and the portions at the two ends of the fine screening cylinder 3 are driven by the two ends of the expansion roller 5 to abut against the partition plate 15 and the inner wall of the screening bin housing 1, and during the movement of the expansion roller 5 in a direction away from the feed passage 14, the area of the fine screening cylinder 3 on the partition plate 15 and the screening bin housing 1 is gradually increased, so that the expansion roller 5 stretches the circumference of the fine screening cylinder 3 (i.e., increases the radius of the cross section, increases the circumference of the cross section) during the outward expansion, and also stretches the axial direction of the fine screening cylinder 3. The fine screening cylinder 3 is stretched around the circumference thereof, which causes the fine screening holes in the fine screening cylinder 3 to be enlarged. When the expansion driving mechanism 6 drives the expansion roller 5 to move reversely, the fine screening cylinder 3 contracts under the deformation action of the self material, so that the aperture of the fine screening holes is reduced, and the purpose of adjusting the aperture of the fine screening holes is achieved.

Here, the circumferential direction of the fine screening holes of the fine screening cylinder 3 may not be uniform due to non-uniform stretching, so that the fine screening holes may deviate to an elliptical shape as a whole after being expanded, the axial direction of the fine screening cylinder may be stretched by two unit distances and the circumference of the cross section of the fine screening cylinder may be approximately stretched by 2pi unit distances as the expanding roller 5 moves one unit distance in the axial direction away from the feed passage 14. Thus, the axial stretch distance of the fine screening cartridge 3 is shorter, and the size of the fine screening holes through which the material can pass is largely changed by the change in the distance of the fine screening holes along the axial direction of the fine screening cartridge 3, thereby changing the size of the material allowed to pass.

In one manner that may be achieved, the size of material that can be admitted through the changed fine screening openings may be determined experimentally, for example by feeding material of known particle size into a horizontal screening machine for screening to determine whether the adjusted pore size of the fine screening openings meets the desired requirements. And after the experiment meets the requirement, the corresponding adjusting position can be recorded to characterize the particle size of the materials which can be screened after the expanding roller is adjusted to the position.

Referring to fig. 2 to 4, on the basis of this, one end of the expanding roller 5 facing away from the first limit baffle 51 is provided with a second limit baffle 52 parallel to the partition plate 15, one end of the second limit baffle 52 facing the partition plate 15 is provided with three balls 53 along the circumference of the axis of the expanding roller 5, and the balls 53 abut against the inner wall of the fine screening cylinder 3 and abut against the partition plate 15 at the corresponding part of the fine screening cylinder 3. The partition 15 is provided with three limiting grooves 16 for limiting the movement track of the balls 53 one by one, and the balls 53 can still be limited by the limiting grooves 16 because the fine screening cylinder 3 is made of elastic materials and has certain deformability. And because of the arrangement of the elastic materials of the fine screening cylinder 3, the first limit baffle plate 51 and the second limit baffle plate 52 on two sides can be extruded by the elastic materials to improve the respective friction force and the overall stability of the expanding roller 5. Wherein the outer contours of the first limit baffle plate 51 and the second limit baffle plate 52 are mutually overlapped along the extending direction of the expanding roller 5. In the process of abutting against the fine screening cylinder 3, a part of the outer edges of the first limit baffle 51 and the second limit baffle 52 abut against the fine screening cylinder 3 to limit the degree to which the fine screening cylinder 3 is enlarged or contracted.

Referring to fig. 3 and 5, the expansion driving mechanism 6 includes a plurality of rotating discs 61 rotatably connected to the outside of the screening bin housing 1 and driving devices 62 for driving the rotating discs 61 to rotate, the rotation axes of the rotating discs 61 are located in the circumferential direction of the feed passage 14, and the rotating discs 61 and the driving devices 62 are connected to the outer surface of the screening bin housing 1. One end of the expansion roller 5 penetrates through the screening bin housing 1 and is welded and fixed on the outer edge of the rotating disc 61, and a limiting channel 17 for the expansion roller 5 to penetrate through and slide is correspondingly arranged on the screening bin housing 1. Under the action of the driving device 62, the rotating disc 61 is driven to synchronously rotate, so that the expanding roller 5 fixed on the outer edge of the rotating disc 61 correspondingly moves. Here, the trajectory of the limiting passage 17 is circular arc and coaxial with the rotating disc 61, and the limiting passage 17 through which the expanding roller 5 passes needs to be opened in the fine screening drum 3. However, it should be noted that, in the process that the expanding roller 5 slides in the limiting channel 17, the axial projection of the limiting channel 17 always needs to fall into the position where the first limiting baffle 51 is located, so that the position where the limiting channel 17 is located is blocked under the mutual cooperation of the three components, and the communication between the fine screening bin 11 and the outside of the screening bin housing 1 is cut off, so that the screened particles in the fine screening bin 11 cannot leak out of the screening bin housing 1 through the limiting channel 17.

The driving device 62 comprises an annular rotary table 621 rotatably connected to the outside of the screening bin housing 1, the annular rotary table 621 is sleeved on the outer side of the feeding pipe 22 of the feeding mechanism 2 and is concentrically arranged with the feeding channel 14, wherein four groups of expansion rollers 5 are arranged in the embodiment, the four groups of expansion rollers 5 are correspondingly connected with a rotary table 61, the four rotary tables 61 are uniformly distributed on the circumference of the annular rotary table 621, and the outer edge of the rotary table 61 is provided with an outer tooth surface meshed with the annular rotary table 621. Here, the entire annular dial 621 may have a gear shape, or an outer tooth surface may be provided only at a portion engaged with the rotating dial 61. Thus, in the process of rotating the annular rotary disk 621, the four rotary disks 61 can be synchronously driven to move in the same direction, so that the four groups of expansion rollers 5 can synchronously expand along the given direction. Here, markings may be provided on the outside of the annular disc 621 to characterize the particle size of the material that the fine screening holes are capable of allowing to screen when the annular disc 621 is rotated to a corresponding angle.

Referring to fig. 6, the expanding roller 5 includes a windward section 54 and a connection section 55 which are coaxially and rotatably connected, the windward section 54 is located in the fine screening drum 3, the connection section 55 is used for being connected with a rotating disc 61, the first limit baffle 51 is fixed on the connection section 55, and the second limit baffle 52 is rotatably connected with the windward section 54. The cross section of the windward section 54 is in streamline arrangement, an adjusting column 56 penetrating through the connecting section 55 is coaxially connected to the windward section 54, the adjusting column 56 extends out of the connecting section 55 and is in damping connection with the connecting section 55, and a specific damping connection mode can be realized by wrapping a rubber sleeve outside the adjusting column 56. Thus, after the annular rotary disk 621 drives the four expanding rollers 5 for corresponding movement, the relative posture of the windward segment 54 in the fine screening drum 3 can be changed by rotating the adjusting column 56 so that the influence on the air flow in the fine screening drum 3 during the stirring of the splitter blades is small.

The screening bin housing 1 is provided with a locking device 63 for locking the annular rotary disk 621, the feeding pipe 22 of the feeding mechanism 2 is connected with the screening bin housing 1 in a flange connection mode, and the annular rotary disk 621 is located on the periphery of the flange end of the feeding pipe 22 and limited by the flange end. The locking device 63 includes a limiting member 631 disposed on the circumference of the annular turntable 621 and a locking member 632 disposed on the limiting member 631, wherein the limiting member 631 is L-shaped and extends to the end surface of the annular turntable 621 to limit the annular turntable 621. Here, the locking member 632 may be a bolt so that the locking member 632 and the stopper 631 cooperate with each other to lock the annular rotary disk 621 in a tight manner, and thus when the annular rotary disk 621 rotates by a desired angle to adjust the fine screening cartridge 3 to a proper state, the state of the annular rotary disk 621 may be locked by the locking member 632 so that the state of the fine screening cartridge 3 is not easily changed during operation.

Referring to fig. 7, as a specific installation mode of the fine screening drum 3, the fine screening drum 3 has a first extension portion 31 extending into the feed passage 14 and abutting against the inner wall of the feed passage 14, and a first burring portion 32 connected to the first extension portion 31 and extending to the outside of the screening bin housing 1, the first burring portion 32 being sandwiched between the annular rotary disk 621 and the screening bin housing 1, and the first burring portion 32 being also sandwiched between the flange end of the feed pipe 22 of the feed mechanism 2 and the screening bin housing 1. The first flanging part 32 not only seals the feeding pipe 22 of the feeding mechanism 2 and the screening bin housing 1, so that the feeding mechanism 2 is directly communicated with the space in the fine screening cylinder 3, but also can exert a certain damping effect on the annular turntable 621.

Referring to fig. 8 and 9, the fine screening cylinder 3 further has a second extending portion 33 extending into the communication passage 13 and abutting against the inner wall of the communication passage 13, and a second burring portion 34 extending into the coarse screening chamber 12 through the communication passage 13, the coarse screening cylinder 4 being provided in the coarse screening chamber 12, the coarse screening cylinder 4 being connected to the partition plate 15 and sandwiching the second burring portion 34 between the coarse screening cylinder 4 and the partition plate 15 to seal a portion of the coarse screening cylinder 4. Specifically, the coarse screening cylinder 4 includes a flange portion 41, a coarse screen portion 42 and a top cover portion 43 that are coaxially connected in sequence, the screen holes of the coarse screen portion 42 are located in the lateral circumferential direction, a plurality of hollow limit posts 44 are integrally provided in the circumferential direction of the flange portion 41, the top cover portion 43 is connected with a connecting sheet 45 extending radially and connected with the limit posts 44, the connecting sheet 45 connects the flange portion 41 and the top cover portion 43 to form a relatively fixed whole, and the coarse screen portion 42, the flange portion 41 and the top cover portion 43 can be fixed by bonding. In the mounting process, the flange portion 41 presses the second flange portion 34 against the partition 15, and the fastening bolt penetrates through the limit post 44 and then is connected with the partition 15, and the coarse screening drum 4 is integrally fixed on the partition 15 by abutting the fastening bolt against the end portion of the limit post 44, where the other end of the conveying rotary main shaft 21 of the feeding mechanism 2 may penetrate through the top cover portion 43 to support the conveying rotary main shaft 21.

Therefore, under the action of the first extending parts 31 and the second extending parts 33 on the two sides of the fine screening cylinder 3, the space in the fine screening cylinder 3 and the fine screening bin 11 can be communicated only through the fine screening holes, and meanwhile, in the process of expanding the fine screening bin 11 by the expanding roller 5, the connection strength between the two ends of the fine screening bin 11 and the partition 15 and the screening bin shell 1 can be improved by the structural arrangement of the first extending parts 31 and the second extending parts 33, so that the fine screening bin 11 is more stable in the process of being expanded.

The implementation principle of the horizontal airflow screen in the embodiment of the application is as follows:

when the aperture of the fine screening drum 3 needs to be adjusted, the bolts locking the annular rotary disk 621 are loosened, the circumferential expansion rollers 5 are rotated to a proper angle to expand the fine screening drum 3 to a proper size, the bolts are tightened, and thereafter the adjusting posts 56 of the expansion rollers 5 are adjusted to adjust the windward section 54 to a proper state.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A horizontal air flow screen, comprising:

the screening bin comprises a screening bin shell (1), wherein a cavity is formed in the screening bin shell (1), a partition plate (15) is arranged in the screening bin shell (1) to divide the cavity into a fine screening bin (11) and a coarse screening bin (12), a communication channel (13) for communicating the fine screening bin (11) with the coarse screening bin (12) is arranged on the partition plate (15), and a feed channel (14) for communicating the fine screening bin (11) is arranged at one end of the screening bin shell (1);

the fine screening cylinder (3) is made of elastic materials, two ends of the fine screening cylinder are respectively and hermetically connected with the communication channel (13) and the feeding channel (14), and a plurality of fine screening holes are formed in the fine screening cylinder (3);

the expansion roller (5) is arranged on the inner side of the fine screening cylinder (3), one end of the expansion roller (5) penetrates through the fine screening cylinder (3) and is connected to the screening bin shell (1) and is positioned in the circumferential direction of the feeding channel (14), the other end of the expansion roller (5) is used for abutting the fine screening cylinder (3) on the partition plate (15), and a first limit baffle (51) is arranged at one end, close to the feeding channel (14), of the expansion roller (5) so as to tightly abut the fine screening cylinder (3) on the inner wall, located in the circumferential direction of the feeding channel (14), of the screening bin shell (1);

an expansion driving mechanism (6) connected to the screening bin shell (1) and used for driving the expansion roller (5) to move in a direction away from the feeding channel (14);

one end of the expansion roller (5) deviating from the first limit baffle (51) is provided with a second limit baffle (52) parallel to the partition plate (15); the outer contours of the first limit baffle (51) and the second limit baffle (52) are mutually overlapped along the extension direction of the expansion roller (5).

2. A horizontal airflow screen as set forth in claim 1 wherein: be provided with a plurality of balls (53) on second limit baffle (52), ball (53) and the inner wall butt of fine screening section of thick bamboo (3), be provided with a plurality of spacing groove (16) that are used for restriction ball (53) motion orbit on baffle (15) expansion actuating mechanism (6) drive expansion roller (5) to the direction removal of keeping away from feed channel (14), ball (53) are spacing in same spacing groove (16) all the time.

3. A horizontal airflow screen as set forth in claim 2 wherein: the expansion driving mechanism (6) comprises a plurality of rotating discs (61) which are connected outside the screening bin shell (1) in a rotating mode and a driving device (62) which drives the rotating discs (61) to rotate, the rotating shaft center of each rotating disc (61) is located outside the feeding channel (14), the expansion roller (5) penetrates through the screening bin shell (1) and is connected to the outer edge of each rotating disc (61), and a limiting channel (17) which is used for the expansion roller (5) to penetrate and slide is arranged on the screening bin shell (1).

4. A horizontal airflow screen as set forth in claim 3 wherein: the driving device (62) comprises an annular rotary table (621) which is rotationally connected to the outside of the screening bin shell (1), the annular rotary table (621) is sleeved on the outer side of the feeding mechanism (2) and is concentric with the feeding channel (14), a plurality of rotary tables (61) are uniformly distributed on the circumference of the annular rotary table (621), the outer edge of each rotary table (61) is provided with an outer tooth surface meshed with the annular rotary table (621), and a locking device (63) for locking the annular rotary table (621) is arranged on the screening bin shell (1).

5. The horizontal airflow screen as set forth in claim 4 wherein: the fine screening cylinder (3) is provided with a first extending part (31) which extends into the feeding channel (14) and is abutted to the inner wall of the feeding channel (14) and a first flanging part (32) which is connected with the first extending part (31) and extends out of the screening bin shell (1), the first flanging part (32) is clamped between the annular rotary disc (621) and the screening bin shell (1), the locking device (63) comprises a plurality of limiting parts (631) arranged on the periphery of the annular rotary disc (621) and locking parts (632) arranged on the limiting parts (631), the limiting parts (631) are used for limiting the annular rotary disc (621), the first flanging part (32) and the screening bin shell (1) to be separated from each other, and the locking parts (632) are used for tightly pressing the annular rotary disc (621) on the first flanging part (32) or loosening the annular rotary disc.

6. A horizontal airflow screen as set forth in claim 3 wherein: the outer edges of the first limit baffle (51) and the second limit baffle (52) are arranged in an arc shape, wherein the limit channel (17) is always positioned in the projection of the first limit baffle (51) in the process that the expansion roller (5) slides in the limit channel (17).

7. A horizontal airflow screen as set forth in claim 3 wherein: the expansion roller (5) comprises a windward section (54) positioned between the first limit baffle (51) and the second limit baffle (52), and the cross section of the windward section (54) is in streamline arrangement.

8. The horizontal airflow screen as set forth in claim 7 wherein: the expansion roller (5) further comprises a connecting section (55) connected with the rotating disc (61), the windward section (54) is rotationally connected with the connecting section (55) and the windward section (54) and the second limit baffle (52), an adjusting column (56) penetrating through the connecting section (55) is coaxially connected to the windward section (54), and the adjusting column (56) is connected with the connecting section (55) in a damping mode.

9. A horizontal airflow screen as set forth in claim 1 wherein: the utility model provides a fine screening section of thick bamboo (3) have through intercommunication passageway (13) and extend second turn-ups portion (34) in coarse screening storehouse (12), be provided with coarse screening section of thick bamboo (4) in coarse screening storehouse (12), coarse screening section of thick bamboo (4) are including coaxial flange portion (41), coarse screening portion (42) and top cap portion (43) that connect gradually, flange portion (41) circumference is provided with a plurality of hollow spacing post (44), top cap portion (43) are connected with connecting piece (45) that radially extend and are connected with spacing post (44), flange portion (41) compress tightly second turn-ups portion (34) on baffle (15), run through in spacing post (44) and be provided with the fastening bolt who is connected with baffle (15), the tip and the tip butt of spacing post (44) of fastening bolt.