Agricultural and pastoral straw screen drum adsorption winnowing machine

Abstract

The invention provides an agricultural and pastoral straw screen drum adsorption winnowing machine, and belongs to the technical field of straw impurity removal, the agricultural and pastoral straw screen drum adsorption winnowing machine comprises a vibrating screen and a winnowing unit which are arranged along a first path, and the winnowing unit comprises a winnowing box, a screen drum, a fan, a first driving part and a scraping plate; the winnowing box is arranged at one end of the vibrating screen, the winnowing box is provided with a feeding port and a discharging port, and the feeding port is in butt joint with the vibrating screen; the screen drum is rotationally connected into the winnowing box, and the screen drum and the winnowing box are arranged in a spaced mode. The fan is communicated with the interior of the screen drum, the fan and the screen drum are sequentially arranged along a second path, and the second path is perpendicular to the first path; the first driving part is in transmission connection with the screen drum and is used for driving the screen drum to rotate by taking the extension direction of the second path as a rotating shaft; the scraping plate is connected to the outer wall of the screen drum, and the side, deviating from the screen drum, of the scraping plate extends to the discharging port. The screening effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of straw impurity removal, and in particular relates to an agricultural and animal husbandry straw screen drum adsorption air separator. Background Art

[0002] In agricultural and animal husbandry production, the comprehensive utilization of crop straw (such as feed, energy, base material, etc.) is an important link in improving resource utilization efficiency and reducing environmental pollution.

[0003] However, during the harvesting and collection process, straw is often mixed with a large amount of impurities, such as soil particles, gravel, dust, etc. These impurities will significantly reduce the quality and safety of subsequent processing of the straw.

[0004] At present, the impurity separation of straw mainly relies on vibration screening technology. The vibration screen achieves physical separation of straw and impurities through the difference in screen aperture. However, fine impurities (such as dust) can easily penetrate the screen and cannot be separated from the straw. In the end, the impurity content in the straw is still higher than the processing requirements, and there is a defect of poor screening effect. Summary of the invention

[0005] The embodiment of the present invention provides an agricultural and animal husbandry straw screen drum adsorption air separator, aiming to solve the technical problem of poor screening effect.

[0006] To achieve the above object, the technical solution adopted by the present invention is: to provide an agricultural and animal husbandry straw screen drum adsorption air separator, comprising a vibrating screen and an air separation unit arranged along a first path, wherein the air separation unit comprises: A wind separation box, the wind separation box having a feed port and a discharge port, the feed port being connected to the vibrating screen; A sieve drum is rotatably disposed in the air separation box, and the sieve drum and the air separation box are radially spaced apart; a fan connected to the interior of the sieve drum, wherein the fan and the sieve drum are sequentially arranged along a second path, and the second path is perpendicular to the first path; a first driving member, drivingly connected to the screen drum, and used for driving the screen drum to rotate with the extending direction of the second path as the rotation axis; and A scraper plate is connected to the outer wall of the screen cylinder, and the scraper plate extends from the side of the screen cylinder to the discharge port.

[0007] In one possible implementation, a material baffle plate is provided in the air separation box, the material baffle plate is parallel to the axis of the sieve cylinder, the side of the material baffle plate away from the sieve cylinder is fixedly connected to the inner wall of the air separation box, and the other side of the material baffle plate is spaced apart from the outer wall of the sieve cylinder.

[0008] In a possible implementation, a material spreading unit is provided on a side of the material baffle plate facing the material feed port, and the material spreading unit includes: A reciprocating shaft, rotatably connected to the baffle plate, wherein the axial direction of the reciprocating shaft is parallel to the second path; A second driving member is drivingly connected to the reciprocating shaft and is used to drive the reciprocating shaft to rotate with the extending direction of the baffle plate as the rotation axis; A reciprocating seat is slidably connected to the material blocking plate, the reciprocating seat is also threadedly connected to the reciprocating shaft, and the reciprocating seat reciprocates along the axis direction of the reciprocating shaft; and A material sorting comb is connected to the reciprocating seat.

[0009] In a possible implementation, the material laying unit further includes a first telescopic member fixedly connected to the reciprocating seat, the first telescopic member telescopes along an axial direction perpendicular to the reciprocating axis, and the material sorting comb is connected to the telescopic end of the first telescopic member.

[0010] In a possible implementation, the material sorting comb is rotatably connected to the telescopic end of the first telescopic member, and the rotation axis of the material sorting comb is perpendicular to the plate surface of the material baffle plate; The material spreading unit also includes a second telescopic member, one end of which is hinged to the reciprocating seat, and the other end is hinged to the material sorting comb, and the hinge axis of the second telescopic member is perpendicular to the plate surface of the material baffle plate.

[0011] In a possible implementation, the reciprocating shaft is respectively provided on the top side and the bottom side of the baffle plate; The reciprocating seat comprises: A moving block is slidably connected to the baffle plate, and the moving block moves along the axial direction of the reciprocating shaft; Two transmission blocks are respectively screwed to the reciprocating shaft, and both of the transmission blocks are detachably connected to the moving block; Wherein, when one of the transmission blocks is connected to the moving block, the other transmission block is separated from the moving block, and the two reciprocating shafts rotate alternately.

[0012] In a possible implementation, both transmission blocks are equipped with a connecting piece, which is located on the side where the two transmission blocks are close to each other, and the telescopic direction of the connecting piece is perpendicular to the axial direction of the reciprocating shaft. The moving block is provided with a socket adapted to the telescopic end of the connecting piece.

[0013] In a possible implementation, the connecting member includes: An expander, which expands and contracts along an axial direction perpendicular to the reciprocating shaft; A screw, the axial direction of which is parallel to the telescopic direction of the telescope, one end of which is rotatably connected to the telescopic end of the telescope, and the other end of which is threadedly connected to the jack; and The rotator is connected to the screw rod and is used to drive the screw rod to rotate around its own central axis.

[0014] In a possible implementation, a material shifting unit is provided on a side of the scraper plate facing the material outlet, and the material shifting unit includes: a material-moving member, rotatably connected to the scraper plate, wherein the rotation axis of the material-moving member is perpendicular to the extension direction of the scraper plate; and The third driving member is transmission-connected with the material-moving member and is used for driving the material-moving member to rotate.

[0015] In a possible implementation, the material moving member includes a plurality of material moving rods, and the plurality of material moving rods are arranged at intervals around a rotation axis of the material moving member.

[0016] Compared with the prior art, the agricultural and animal husbandry straw screen drum adsorption air separator provided by the present invention has a vibration screen as the first-level screening equipment, which is responsible for removing large impurities in the straw. When the straw is fed into the vibration screen, the screen body generates reciprocating motion under the action of the vibration force. This motion makes it impossible for large impurities such as stones and soil particles in the straw to pass through the screen holes together with the straw due to their large weight and volume. These large impurities are gradually separated on the screen surface of the vibration screen and eventually discharged from the system, thereby achieving the initial purification of the straw. The straw screened by the vibration screen is sucked into the interlayer between the screen drum and the air separation box from the feed port by the fan. In this process, the straw is adsorbed on the outer wall of the screen drum and rotates in the interlayer together with the rotation of the screen drum. The rotation of the screen drum not only drives the rotation of the straw, but also creates conditions for the subsequent secondary screening. During the rotation of the straw, the fan continuously generates suction, which causes fine impurities (such as dust) in the straw to be sucked into the screen drum. Since the screen holes of the screen drum are designed to be small enough, these fine impurities can easily pass through the screen holes and be discharged from the system by the fan, while the straw itself cannot pass through the screen holes due to its large size, so it is retained on the outer wall of the screen drum. Through such a design, the screen drum not only achieves the clamping and transmission of the straw during the rotation process, but also completes the secondary screening of the straw. This two-stage screening method greatly improves the screening effect of the straw and ensures that the impurities in the straw can be completely removed. In the process of straw processing, the two-stage screening system of the vibrating screen and the screen drum efficiently removes impurities in the straw through two core steps, namely the initial purification of the vibrating screen and the secondary screening of the screen drum. This system not only improves the screening effect of the straw, but also ensures that the purity of the straw meets the requirements of subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the agricultural and animal husbandry straw screen drum adsorption air separator according to an embodiment of the present invention; Figure 2A schematic diagram of the structure of the screen drum, scraper plate and baffle plate used in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a material laying unit used in an embodiment of the present invention; Figure 4 A schematic structural diagram of another variant implementation of the material laying unit used in an embodiment of the present invention; Figure 5 A partial schematic diagram of a connecting member used in an embodiment of the present invention; Figure 6 A schematic structural diagram of another variant implementation of a connector used in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the material shifting unit used in an embodiment of the present invention.

[0018] Description of reference numerals: 10. Vibrating screen; 20. air selection unit; 201. air selection box; 202. screen drum; 203. fan; 204. scraper plate; 205. baffle plate; 30. Material laying unit; 301. Reciprocating shaft; 302. Reciprocating seat; 3021. Moving block; 30211. Insertion hole; 3022. Transmission block; 303. Material sorting comb; 304. First telescopic member; 305. Second telescopic member; 40, connector; 401, telescope; 402, rotator; 403, screw; 50. Material shifting unit; 501. Material shifting member; 5011. Material shifting rod; 502. Third driving member. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] Please also read Figures 1 to 7, the present invention is to describe the adsorption wind separator of the agricultural and animal husbandry straw screen drum 202. The adsorption wind separator of the agricultural and animal husbandry straw screen drum 202 comprises a vibrating screen 10 and a wind separator unit 20 arranged along a first path, wherein the wind separator unit 20 comprises a wind separator box 201, a screen drum 202, a fan 203, a first driving member (not shown) and a scraper plate 204, wherein the wind separator box 201 is arranged at one end of the vibrating screen 10, and the wind separator box 201 has a feed port and a discharge port, wherein the feed port is connected to the vibrating screen 10; the screen drum 202 is rotatably arranged in the wind separator box 201, and The sieve drum 202 is spaced apart from the air separation box 201; the fan 203 is connected to the inside of the sieve drum 202, and the fan 203 and the sieve drum 202 are arranged in sequence along the second path, and the second path is perpendicular to the first path; the first driving member is transmission-connected to the sieve drum 202, and is used to drive the sieve drum 202 to rotate with the extension direction of the second path as the rotation axis; the scraper plate 204 is connected to the outer wall of the sieve drum 202, and the scraper plate 204 extends from the side of the sieve drum 202 to the discharge port.

[0021] Specifically, the first driving member is a motor.

[0022] It should be noted that a pulse dust collector or a bag dust collector can be installed at the air outlet of the fan 203.

[0023] The agricultural and animal husbandry straw screen drum 202 adsorption air separator provided in this embodiment is compared with the prior art. The vibrating screen 10 is used as the first-level screening equipment to remove large impurities in the straw. When the straw is fed into the vibrating screen 10, the screen body produces reciprocating motion under the action of the vibration force. This motion makes it impossible for large impurities such as stones and soil particles in the straw to pass through the sieve holes together with the straw due to their large weight and volume. These large impurities are gradually separated on the screen surface of the vibrating screen 10 and eventually discharged from the system, thereby achieving the preliminary purification of the straw. The straw screened by the vibrating screen 10 is sucked into the interlayer between the screen drum 202 and the air separation box 201 from the feed port by the fan 203. In this process, the straw is adsorbed on the outer wall of the screen drum 202 and rotates together in the interlayer with the rotation of the screen drum 202. The rotation of the screen drum 202 not only drives the rotation of the straw, but also creates conditions for the subsequent secondary screening. During the rotation of the straw, the fan 203 continuously generates suction, which causes the fine impurities (such as dust) in the straw to be sucked into the screen drum 202. Since the screen holes of the screen drum 202 are designed to be small enough, these fine impurities can easily pass through the screen holes and be discharged from the system by the fan 203, while the straw itself cannot pass through the screen holes due to its large volume, and is retained on the outer wall of the screen drum 202. Through such a design, the screen drum 202 not only realizes the clamping and transmission of the straw during the rotation process, but also completes the secondary screening of the straw at the same time. This two-stage screening method greatly improves the screening effect of the straw and ensures that the impurities in the straw can be completely removed. In the straw processing process, the two-stage screening system of the vibrating screen 10 and the screen drum 202 efficiently removes the impurities in the straw through two core steps, namely the initial purification of the vibrating screen 10 and the secondary screening of the screen drum 202. This system not only improves the screening effect of the straw, but also ensures that the purity of the straw meets the requirements of subsequent processing.

[0024] In some embodiments, see Figure 1 and Figure 2 A baffle plate 205 is provided in the air separation box 201, and the baffle plate 205 is parallel to the axis of the sieve cylinder 202. The side of the baffle plate 205 away from the sieve cylinder 202 is fixedly connected to the inner wall of the air separation box 201, and the other side of the baffle plate 205 is spaced apart from the outer wall of the sieve cylinder 202.

[0025] A material passage is formed between the baffle plate 205 and the outer wall of the screen drum 202. When the thickness of the straw is less than or equal to the height of the material passage, the straw can all pass through the material passage. However, once the thickness of the straw exceeds the height of the material passage, the baffle plate 205 will immediately take effect and intercept the excess portion. In this way, the thickness of the straw adsorbed on the outer wall of the screen drum 202 is limited to the height of the material passage. The design of the baffle plate 205 actually automatically forms a physical interception barrier, which forcibly keeps the straw layer on the surface of the screen drum 202 at a preset stable thickness. This mechanism effectively avoids the problem of reduced screening effect of the screen drum 202 due to excessive straw thickness, thereby ensuring that the screen drum 202 can continuously and efficiently screen fine impurities.

[0026] In some embodiments, see Figure 3 A material spreading unit 30 is provided on the side of the material baffle plate 205 facing the material feed port, and the material spreading unit 30 includes a reciprocating shaft 301, a second driving member (not shown), a reciprocating seat 302 and a material sorting comb 303. The reciprocating shaft 301 is rotatably connected to the material baffle plate 205, and the axial direction of the reciprocating shaft 301 is parallel to the second path; the second driving member is transmission-connected to the reciprocating shaft 301, and is used to drive the reciprocating shaft 301 to rotate with the extension direction of the material baffle plate 205 as the rotation axis; the reciprocating seat 302 is slidably connected to the material baffle plate 205, and the reciprocating seat 302 is also screwed to the reciprocating shaft 301, and the reciprocating seat 302 reciprocates along the axial direction of the reciprocating shaft 301; the material sorting comb 303 is connected to the reciprocating seat 302.

[0027] Specifically, the second driving member is a motor.

[0028] The second driving member starts to drive the reciprocating shaft 301 to rotate, so that the reciprocating seat 302 moves in a straight line. The moving direction of the reciprocating seat 302 is changed by changing the direction of the output shaft of the second driving member, so that the reciprocating seat 302 can reciprocate. The reciprocating seat 302 will drive the material comb 303 to reciprocate during the reciprocating motion.

[0029] Driven by the reciprocating seat 302, the sorting comb 303 spreads out the straw adsorbed on the outer wall of the screen drum 202, effectively avoiding concentrated accumulation and overlapping of the straw, ensuring that the straw adsorbed on the outer wall of the screen drum 202 can be distributed more evenly, which not only optimizes the working state of the screen drum 202, but also further improves the screening efficiency and effect of the screen drum 202 for fine impurities, making the entire screening process more efficient.

[0030] In some embodiments, see Figure 3 The material spreading unit 30 also includes a first telescopic member 304 fixedly connected to the reciprocating seat 302 , the first telescopic member 304 is telescopic along an axial direction perpendicular to the reciprocating shaft 301 , and the material sorting comb 303 is connected to the telescopic end of the first telescopic member 304 .

[0031] Specifically, the first telescopic member 304 may be a telescopic oil cylinder, an electric cylinder, or a hydraulic cylinder.

[0032] When the material comb 303 gradually approaches the inner wall of the air separation box 201 in its reciprocating trajectory, the first telescopic member 304 is activated in time to quickly and smoothly retract the material comb 303, so that the material comb 303 is away from the straw layer adsorbed by the outer wall of the screen cylinder 202. This action effectively prevents the material comb 303 from accidentally piling up straw on the inner wall of the air separation box 201 during the continued movement. Subsequently, when the material comb 303 moves to the preset round-trip point, the first telescopic member 304 is activated again, this time to slowly extend the material comb 303, so that it is accurately inserted into the straw layer adsorbed by the outer wall of the screen cylinder 202, and continues to perform its task of spreading the straw. This design ensures the working efficiency of the material comb 303.

[0033] In some embodiments, see Figure 4 The material sorting comb 303 is rotatably connected to the telescopic end of the first telescopic member 304 , and the rotation axis of the material sorting comb 303 is perpendicular to the plate surface of the material blocking plate 305 .

[0034] The material spreading unit 30 further comprises a second telescopic member 305 , one end of which is hinged to the reciprocating seat 302 , and the other end of which is hinged to the material sorting comb 303 . The hinge axis of the second telescopic member 305 is perpendicular to the surface of the material blocking plate 205 .

[0035] Specifically, the second telescopic member 305 can be a telescopic oil cylinder, an electric cylinder, or a hydraulic cylinder.

[0036] When the material comb 303 moves to the round-trip point according to the preset trajectory, the second telescopic member 305 starts to extend the material comb 303 in time, so that the bottom end of the material comb 303 begins to slowly tilt toward the inner wall of the air separation box 201 until the bottom end of the material comb 303 fits the inner wall of the air separation box 201. At the same time, the first telescopic member 304 also starts to extend, pushing the material comb 303 to descend steadily. During the descent of the material comb 303, the bottom end of the material comb 303 fits the inner wall of the air separation box 201, further reducing the possibility of straw being accidentally accumulated on the inner wall of the air separation box 201, making the entire workflow smoother and more efficient.

[0037] In some embodiments, see Figure 4 The top and bottom sides of the baffle plate 205 are respectively provided with a reciprocating shaft 301. The reciprocating seat 302 includes a moving block 3021 and two transmission blocks 3022. The moving block 3021 is slidably connected to the baffle plate 205, and the moving block 3021 moves along the axis direction of the reciprocating shaft 301; the two transmission blocks 3022 are respectively screwed to the reciprocating shaft 301, and the two transmission blocks 3022 are detachably connected to the moving block 3021.

[0038] When one transmission block 3022 is connected to the moving block 3021 , the other transmission block 3022 is separated from the moving block 3021 , and the two reciprocating shafts 301 rotate alternately.

[0039] Specifically, two second driving members are provided, both of which are motors. The output shafts of the second driving members are directly fixed to the center of the end of the reciprocating shaft 301. The two second driving members are started alternately, and the moving block 3021 is adsorbed and fixed to the transmission block 3022 corresponding to the second driving member in the working state.

[0040] The second driving member starts to drive the corresponding reciprocating shaft 301 to rotate. The rotation of the reciprocating shaft 301 drives the corresponding moving block 3021 to move through the corresponding transmission block 3022, thereby driving the material sorting comb 303 to move. When the material sorting comb 303 moves to the round-trip point, the second driving member stops working, and another second driving member starts, thereby driving the material sorting comb 303 to move to the origin.

[0041] In some embodiments, the transmission block 3022 and the moving block 3021 may be connected via an electromagnet. When the electromagnet is powered on, the transmission block 3022 and the moving block 3021 are adsorbed and fixed. When the electromagnet is powered off, the transmission block 3022 and the moving block 3021 are separated.

[0042] In some embodiments, the transmission block 3022 and the moving block 3021 can be connected by an electric suction cup. Two electric suction cups are provided. Both electric suction cups can be fixedly installed on the moving block 3021. The two electric suction cups can also be installed on the two transmission blocks 3022 respectively.

[0043] In some embodiments, both transmission blocks 3022 are equipped with a connecting member 40, which is located on the side where the two transmission blocks 3022 are close to each other. The telescopic direction of the connecting member 40 is perpendicular to the axial direction of the reciprocating shaft 301, and the moving block 3021 is provided with a socket 30211 adapted to the telescopic end of the connecting member 40.

[0044] When the moving block 3021 needs to be connected to the transmission block 3022 , the connecting member 40 extends out and is inserted into the insertion hole 30211 , so that when the transmission block 3022 moves, it can drive the moving block 3021 to move synchronously.

[0045] In some embodiments, see Figure 5 The connecting member 40 can be a telescopic oil cylinder, a hydraulic cylinder, or an electric cylinder, and the telescopic end of the connecting member 40 is plugged and adapted to the socket 30211.

[0046] In some embodiments, see Figure 6The connecting member 40 includes a telescope 401, a screw 403 and a rotator 402. The telescope 401 is telescopic along an axial direction perpendicular to the reciprocating shaft 301; the axial direction of the screw 403 is parallel to the telescopic direction of the telescope 401, one end of the screw 403 is rotatably connected to the telescopic end of the telescope 401, and the other end of the screw 403 is threadedly connected to the socket 30211; the rotator 402 is transmission-connected to the screw 403, and is used to drive the screw 403 to rotate around its own central axis.

[0047] Specifically, the telescopic device 401 may be a telescopic oil cylinder, a hydraulic cylinder, or an electric cylinder, and the rotator 402 may be a motor.

[0048] When the moving block 3021 needs to be connected to the transmission block 3022, the telescopic device 401 pushes the screw rod 403 close to the socket 30211. During the process of the screw rod 403 approaching the socket 30211, the rotator 402 starts to drive the screw rod 403 to rotate, thereby inserting the screw rod 403 into the socket 30211; when the moving block 3021 needs to be separated from the transmission block 3022, the telescopic device 401 and the rotator 402 are started synchronously, the rotator 402 drives the screw rod 403 to rotate, and the telescopic device 401 is retracted at the same time, thereby pulling the screw rod 403 out of the socket 30211.

[0049] The threaded connection has self-locking properties, and the threaded connection is more stable than the plug-in connection, thereby making the connection between the moving block 3021 and the transmission block 3022 more stable, thereby improving the stability of the material comb 303 during the reciprocating motion.

[0050] In some embodiments, see Figure 7 A material shifting unit 50 is provided on the side of the scraper plate 204 facing the material outlet. The material shifting unit 50 includes a material shifting member 501 and a third driving member 502. The material shifting member 501 is rotatably connected to the scraper plate 204, and the rotation axis of the material shifting member 501 is perpendicular to the extension direction of the scraper plate 204; the third driving member 502 is transmission-connected to the material shifting member 501, and is used to drive the material shifting member 501 to rotate.

[0051] It should be noted that the third driving component 502 is a motor.

[0052] The straw is adsorbed on the outer wall of the screen drum 202, and as the screen drum 202 rotates, the straw moves to the scraper plate 204. Since the scraper plate 204 abuts against the outer wall of the screen drum 202, the scraper plate 204 separates the straw from the outer wall of the screen drum 202, and the straw falls on the scraper plate 204. After the straw falls on the surface of the scraper plate 204, the third driving member 502 starts to drive the material shifting member 501 to rotate, so that the material shifting member 501 shifts the straw to the discharge port, thereby accelerating the discharge speed.

[0053] In some embodiments, see Figure 7The material shifting member 501 includes a plurality of material shifting rods 5011 , and the plurality of material shifting rods 5011 are arranged at intervals around the rotation axis of the material shifting member 501 .

[0054] A multi-rod material-discharging structure is adopted, and each rod is arranged radially. When the material-discharging member 501 rotates, each material-discharging rod 5011 contacts the straw in turn, forming a continuous pulse unloading effect, further accelerating the unloading speed.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An agricultural and animal husbandry straw screen drum adsorption air separator, characterized in that: It includes a vibrating screen and a wind selection unit arranged along a first path, and the wind selection unit includes: A wind separation box, the wind separation box having a feed port and a discharge port, the feed port being connected to the vibrating screen; A sieve drum is rotatably disposed in the air separation box, and the sieve drum and the air separation box are radially spaced apart; a fan connected to the interior of the sieve drum, wherein the fan and the sieve drum are sequentially arranged along a second path, and the second path is perpendicular to the first path; a first driving member, drivingly connected to the screen drum, and used for driving the screen drum to rotate with the extending direction of the second path as the rotation axis; and A scraper plate is connected to the outer wall of the screen cylinder, and the scraper plate extends from the side of the screen cylinder to the discharge port.

2. The agricultural and animal husbandry straw screen drum adsorption air separator according to claim 1, characterized in that: A material baffle plate is provided in the air separation box, the material baffle plate is parallel to the axis of the sieve cylinder, one side of the material baffle plate away from the sieve cylinder is fixedly connected to the inner wall of the air separation box, and the other side of the material baffle plate is spaced apart from the outer wall of the sieve cylinder.

3. The agricultural and animal husbandry straw screen drum adsorption air separator according to claim 2, characterized in that: A material spreading unit is provided on one side of the baffle plate facing the feed inlet, and the material spreading unit comprises: A reciprocating shaft, rotatably connected to the baffle plate, wherein the axial direction of the reciprocating shaft is parallel to the second path; A second driving member is drivingly connected to the reciprocating shaft and is used to drive the reciprocating shaft to rotate with the extending direction of the baffle plate as the rotation axis; A reciprocating seat is slidably connected to the material blocking plate, the reciprocating seat is also threadedly connected to the reciprocating shaft, and the reciprocating seat reciprocates along the axis direction of the reciprocating shaft; and A material sorting comb is connected to the reciprocating seat.

4. The agricultural and animal husbandry straw screen drum adsorption air separator according to claim 3, characterized in that: The material spreading unit further comprises a first telescopic member fixedly connected to the reciprocating seat, the first telescopic member telescopes along an axial direction perpendicular to the reciprocating shaft, and the material sorting comb is connected to the telescopic end of the first telescopic member.

5. The agricultural and animal husbandry straw screen drum adsorption air separator according to claim 4, characterized in that: The material sorting comb is rotatably connected to the telescopic end of the first telescopic member, and the rotation axis of the material sorting comb is perpendicular to the plate surface of the material baffle plate; The material spreading unit also includes a second telescopic member, one end of which is hinged to the reciprocating seat, and the other end is hinged to the material sorting comb, and the hinge axis of the second telescopic member is perpendicular to the plate surface of the material baffle plate.

6. The agricultural and animal husbandry straw screen drum adsorption air separator according to claim 3, characterized in that: The reciprocating shaft is respectively provided on the top side and the bottom side of the baffle plate; The reciprocating seat comprises: A moving block is slidably connected to the baffle plate, and the moving block moves along the axial direction of the reciprocating shaft; Two transmission blocks are respectively screwed to the reciprocating shaft, and both of the transmission blocks are detachably connected to the moving block; Wherein, when one of the transmission blocks is connected to the moving block, the other transmission block is separated from the moving block, and the two reciprocating shafts rotate alternately.

7. The agricultural and animal husbandry straw screen drum adsorption air separator according to claim 6, characterized in that: The two transmission blocks are both equipped with a connecting piece, which is located on the side where the two transmission blocks are close to each other. The telescopic direction of the connecting piece is perpendicular to the axial direction of the reciprocating shaft, and the moving block is provided with a socket adapted to the telescopic end of the connecting piece.

8. The agricultural and animal husbandry straw screen drum adsorption air separator according to claim 7, characterized in that: The connecting piece comprises: An expander, which expands and contracts along an axial direction perpendicular to the reciprocating shaft; A screw, the axial direction of which is parallel to the telescopic direction of the telescope, one end of which is rotatably connected to the telescopic end of the telescope, and the other end of which is threadedly connected to the jack; and The rotator is connected to the screw rod and is used to drive the screw rod to rotate around its own central axis.

9. The agricultural and animal husbandry straw screen drum adsorption air separator according to claim 1, characterized in that: A material shifting unit is provided on one side of the scraper plate facing the material outlet, and the material shifting unit comprises: a material-moving member, rotatably connected to the scraper plate, wherein the rotation axis of the material-moving member is perpendicular to the extension direction of the scraper plate; and The third driving member is transmission-connected with the material-moving member and is used for driving the material-moving member to rotate.

10. The agricultural and animal husbandry straw screen drum adsorption air separator according to claim 9, characterized in that: The material-moving member comprises a plurality of material-moving rods, and the plurality of material-moving rods are arranged at intervals around the rotating shaft of the material-moving member.

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