Multifunctional grain screening machine

Abstract

The utility model belongs to grain screening technical field, and disclose: a multifunctional grain screening machine, including movable rack, the movable rack is installed with hopper, the right side position of hopper's discharge gate is provided with centrifugal fan, the centrifugal fan is installed on movable rack, the centrifugal fan's blowing direction corresponds with the discharge position of hopper, the centrifugal fan's below is provided with screening mechanism, the screening mechanism is installed on movable rack, the screening mechanism includes screening frame, the left side of screening frame is connected with the vibration drive mechanism of installation on movable rack, locking assembly only needs to be manually pulled operation to be able to quickly unlock or lock screen, need not tool auxiliary, greatly shorten the time cost of screen replacement and cleaning, and the automatic cleaning of brush strip cleaning assembly realizes the screen hole blockage, can reduce the frequency of shutdown, improve the continuous operation ability of equipment.

Description

Technical Field

[0001] This utility model belongs to the field of grain screening technology, specifically a multi-functional grain screening machine. Background Technology

[0002] In agricultural production, after grain harvest, impurities such as straw, stones, and shriveled grains need to be removed to ensure quality. However, traditional manual screening methods are inefficient and labor-intensive. Mechanized screening equipment has become one of the core pieces of equipment for post-harvest grain processing. Currently, although grain screening machines on the market can combine air separation and screening processes to separate impurities, there are still many technical challenges:

[0003] Screen maintenance is inconvenient: Most screening machines use welding or complex bolts to fix the screens, making disassembly and replacement cumbersome. Cleaning clogged screen holes requires stopping the machine for disassembly, which consumes a lot of manpower and time. Lack of automation in screen cleaning: The screen surface is prone to clogging due to material accumulation (such as damp grain sticking together), but existing equipment mostly relies on manual cleaning, which can lead to a decrease in screening efficiency and an increase in equipment load in the long run.

[0004] Therefore, a multifunctional grain screening machine is proposed to address the above problems. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides a multi-functional grain screening machine, which has the advantages of easy disassembly and assembly of the screen with locking components, stable and reliable operation under vibration conditions, automatic cleaning of screen holes by the brush cleaning component, and flexible protection of multi-level screens.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-functional grain screening machine, including a mobile frame, a hopper installed on the mobile frame, a centrifugal fan located on the right side of the hopper's discharge port, the centrifugal fan being mounted on the mobile frame, the blowing direction of the centrifugal fan corresponding to the discharge position of the hopper, and a screening mechanism located below the centrifugal fan, the screening mechanism being mounted on the mobile frame;

[0007] The screening mechanism includes a screening frame. A vibration drive mechanism mounted on a mobile frame is connected to the left side of the screening frame. Large-hole screens and small-hole screens are installed on the inner side of the screening frame, with corresponding large-hole and small-hole screens. Positioning guide grooves are provided on the inner wall of the screening frame at positions corresponding to the large-hole and small-hole screens. The front sides of the large-hole and small-hole screens are connected to the screening frame via locking components. Brush cleaning components are installed on the screening frame at positions corresponding to the large-hole and small-hole screens.

[0008] Preferably, a large particle impurity discharge plate and a clean grain discharge plate are respectively attached to the right side of the large-hole screen and the small-hole screen, and a small particle impurity discharge plate is provided at the bottom right end of the screening frame. The large particle impurity discharge plate, the clean grain discharge plate, and the small particle impurity discharge plate are all fixedly connected to the screening frame.

[0009] Preferably, guide positioning grooves are provided on the front side of the screening frame at positions corresponding to the large-hole screen and the small-hole screen.

[0010] Preferably, the locking assembly includes a fixed shell fixed to the front side of the screening frame, a movable plate is provided inside the fixed shell, a return spring is connected to the top of the movable plate, the return spring is located inside the fixed shell, a pull rod is provided inside the return spring, the bottom end of the pull rod is fixedly connected to the movable plate, the top end of the pull rod passes through the fixed shell and is connected to a pull block, a positioning rod is fixedly connected to the bottom of the movable plate, and a fixing ear is fixedly connected to the front side of the large-hole screen and the small-hole screen at a position corresponding to the positioning rod, a positioning hole is opened on the fixing ear, and the bottom end of the positioning rod extends into the positioning hole.

[0011] Preferably, both the large-hole screen and the small-hole screen have handles fixedly connected to their front sides.

[0012] Preferably, the brush cleaning assembly includes a lead screw and a positioning slide rod arranged vertically and vertically on the left side of the screening frame. One end of the lead screw is connected to a small motor. A displacement block is connected between the lead screw and the positioning slide rod. Two moving rods are fixedly connected to the right side of the displacement block. A flexible strip is provided at the bottom of the moving rod. The upper and lower flexible strips slide and fit against the upper surfaces of the large-hole screen and the small-hole screen, respectively.

[0013] Preferably, a strip-shaped groove is provided on the left side of the screening frame at a position corresponding to the moving rod, and the moving rod passes through the strip-shaped groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The locking component of this utility model has a linkage structure of pull block, pull rod and positioning rod. It can quickly unlock or lock the screen by manual lifting operation without the need for tools. Compared with the traditional bolt or welding fixing method, it greatly shortens the time cost of screen replacement (such as changing the screen with the corresponding aperture to adapt to different grain varieties such as wheat and corn) and cleaning, reduces the difficulty of operation for farmers and improves the efficiency of equipment maintenance.

[0016] 2. The small motor drives the lead screw of the brush cleaning component of this utility model to rotate, and the displacement block drives the flexible strip to move back and forth along the screen surface, so as to realize the automatic cleaning of screen hole blockage (such as broken grains and sticky impurities). Compared with manual cleaning, it can reduce the frequency of machine downtime and improve the continuous operation capability of the equipment, especially suitable for large-scale grain screening scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the screening mechanism of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0020] Figure 4 This is a schematic diagram of the screening framework of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the brush cleaning assembly of this utility model;

[0022] Figure 6 This is a schematic diagram of the locking component of this utility model.

[0023] In the picture:

[0024] 1. Mobile frame; 2. Hopper; 3. Centrifugal fan;

[0025] 4. Screening agency;

[0026] 41. Screening frame; 42. Large-hole screen; 43. Small-hole screen; 44. Positioning guide groove;

[0027] 45. Locking assembly; 451. Fixed housing; 452. Movable plate; 453. Return spring; 454. Pull rod; 455. Pull block; 456. Positioning rod; 457. Fixed lug; 458. Positioning hole;

[0028] 46. ​​Brush cleaning assembly; 461. Lead screw; 462. Positioning slide bar; 463. Small motor;

[0029] 464. Displacement block; 465. Moving rod; 466. Flexible strip; 467. Strip-shaped through groove;

[0030] 47. Guide positioning slot; 48. Handle;

[0031] 5. Large particle impurity removal plate; 6. Clean grain removal plate; 7. Small particle impurity removal plate. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figures 1 to 6 As shown, this utility model provides a multi-functional grain screening machine, including a mobile frame 1. The mobile frame 1 facilitates the overall movement of the equipment, adapts to different working sites, and improves the flexibility of equipment use. A hopper 2 is installed on the mobile frame 1. The hopper 2 provides a centralized feeding space for the grain to be screened. The inclined structure guides the material to flow evenly to the air separation area of ​​the centrifugal fan 3, avoiding local accumulation. The centrifugal fan 3 is set on the right side of the discharge port of the hopper 2. The centrifugal fan 3 separates light impurities in the grain, such as shriveled grains, dust, and straw fragments, through airflow, thus initially improving the quality of the grain. The centrifugal fan 3 is installed on the mobile frame 1, and the blowing direction of the centrifugal fan 3 corresponds to the discharge position of the hopper 2. A screening mechanism 4 is set below the centrifugal fan 3. The screening mechanism 4 is the core module of grain grading and screening, integrating multi-level screens and cleaning components to achieve precise separation of impurities and self-cleaning of the screens. The screening mechanism 4 is installed on the mobile frame 1.

[0034] The screening mechanism 4 includes a screening frame 41, which provides a foundation for the installation and vibration support of the large-aperture screen 42 and the small-aperture screen 43, ensuring the structural stability of the screening operation. A vibration drive mechanism mounted on a mobile frame 1 is connected to the left side of the screening frame 41. This mechanism provides vibration power to the screening frame 41, allowing the grain to be evenly dispersed on the screens and quickly completed for grading, thus improving screening efficiency. The inner side of the screening frame 41 is equipped with corresponding large-aperture screens 42 and small-aperture screens 43. The large-aperture screen 42 intercepts and separates large particles of impurities from the grain, while the small-aperture screen 43 further filters out small particles. The double-layer screens work together to achieve multi-level grading, improving the purity of the clean grain. The inner wall of the screening frame 41 is aligned with the large-aperture screen 42 and the small-aperture screen 43. Positioning guide grooves 44 are provided at corresponding positions for the large-hole screen 42 and small-hole screen 43, providing insertion guidance and lateral limiting to ensure accurate screen installation and prevent displacement during vibration operation. The front sides of the large-hole screen 42 and small-hole screen 43 are connected to the screening frame 41 through locking components 45. The locking components 45 enable quick disassembly and assembly of the large-hole screen 42 and small-hole screen 43 and stable locking under vibration conditions, allowing screen replacement to be completed without tools, thus improving maintenance convenience. Brush cleaning components 46 are installed on the screening frame 41 at positions corresponding to the large-hole screen 42 and small-hole screen 43. The brush cleaning components 46 automatically clean the blockages on the surface of the large-hole screen 42 and small-hole screen 43, preventing material accumulation in the screen holes from affecting screening efficiency and extending the service life of the screen.

[0035] Specifically, a large particle impurity discharge plate 5 and a clean grain discharge plate 6 are respectively attached to the right side of the large-hole screen 42 and the small-hole screen 43. A small particle impurity discharge plate 7 is set at the bottom right end of the screening frame 41. The large particle impurity discharge plate 5, the clean grain discharge plate 6, and the small particle impurity discharge plate 7 are all fixedly connected to the screening frame 41. The large particle impurity discharge plate 5 guides the large impurities separated by the large-hole screen 42 to be discharged in a concentrated manner. The clean grain discharge plate 6 receives the qualified grain after screening by the small-hole screen 43. The small particle impurity discharge plate 7 collects the small impurities that fall through the small-hole screen 43. The three-channel design realizes the classified output of materials and improves the collection efficiency.

[0036] Furthermore, guide positioning grooves 47 are provided on the front side of the screening frame 41 at positions corresponding to the large-hole screen 42 and the small-hole screen 43. The guide positioning grooves 47 provide insertion guidance for the front of the large-hole screen 42 and the small-hole screen 43, and together with the positioning guide grooves 44, achieve precise positioning of the entire length of the screen.

[0037] Furthermore, the locking assembly 45 includes a fixed housing 451 fixed to the front side of the screening frame 41. The fixed housing 451 provides an installation and protective shell for the locking assembly 45, preventing impurities from entering and affecting the operation of the assembly. A movable plate 452 is provided inside the fixed housing 451. The movable plate 452 drives the positioning rod 456 to complete the locking or unlocking action by moving vertically, and is the core transmission component of the assembly. A return spring 453 is connected to the top of the movable plate 452. The return spring 453 provides a downward preload to the movable plate 452 to ensure that the positioning rod 456 is stably embedded in the positioning hole 458, improving the locking reliability under vibration conditions. The return spring 453 is located inside the fixed housing 451, and a pull rod 454 is provided inside the return spring 453. The pull rod 454 provides a lifting force point for the operator, which is converted into the vertical displacement of the movable plate 452 through mechanical transmission. The bottom end of the pull rod 454 is fixedly connected to the movable plate 452. A pulling block 455 is connected to the top of the fixed shell 451. The pulling block 455 increases the force application area for the operator, making the lifting operation more effortless and convenient. A positioning rod 456 is fixedly connected to the bottom of the movable plate 452. The positioning rod 456 achieves mechanical locking between the screen and the screening frame 41 by inserting into the positioning hole 458. The structure is simple and reliable. The front sides of the large-hole screen 42 and the small-hole screen 43 are fixedly connected to the corresponding positions of the positioning rod 456. The fixing ear 457 provides a locking interface for the screen. Through the cooperation of the positioning hole 458 and the positioning rod 456, the screen can be quickly disassembled and assembled. The positioning hole 458 is opened on the fixing ear 457. The positioning hole 458 and the positioning rod 456 form a precise fit to ensure the consistency of the screen installation position. The bottom end of the positioning rod 456 extends into the positioning hole 458. The fitting structure of the positioning rod 456 and the positioning hole 458 effectively prevents the screen from shifting during vibration operation and ensures screening accuracy.

[0038] It is worth noting that both the large-hole screen 42 and the small-hole screen 43 are fixedly connected to the front side with handles 48. The handles 48 provide a force point for pulling the large-hole screen 42 and the small-hole screen 43, making the screen assembly and disassembly more convenient and labor-saving.

[0039] It is worth noting that the brush cleaning assembly 46 includes a lead screw 461 and a positioning slide rod 462, which are correspondingly arranged vertically on the left side of the screening frame 41. The lead screw 461 and the positioning slide rod 462 cooperate to provide transmission and guidance for the horizontal movement of the displacement block 464, ensuring that the flexible strip 466 moves smoothly along the screen surface. One end of the lead screw 461 is connected to a small motor 463, which provides rotational power to the lead screw 461 and is the power source of the brush cleaning assembly 46, realizing automated cleaning. The displacement block 464 is connected between the lead screw 461 and the positioning slide rod 462. The displacement block 464 converts the rotational motion of the lead screw 461 into horizontal linear motion, driving the movement of the brush cleaning assembly 464. Rod 465 and flexible strip 466 complete the cleaning action. Two moving rods 465 are fixedly connected to the right side of displacement block 464. The moving rods 465 provide installation support for flexible strip 466 and transmit the power of displacement block 464 to the cleaning area. Flexible strip 466 is set at the bottom of moving rod 465. Flexible strip 466 is made of wear-resistant flexible material to avoid scratching the screen when cleaning screen blockage, improve cleaning reliability and screen life. The upper and lower flexible strips 466 slide and fit against the upper surface of large-hole screen 42 and small-hole screen 43 respectively. The sliding fit design between flexible strip 466 and screen surface ensures that the entire screen area is cleaned without dead corners, preventing material accumulation from clogging the screen holes.

[0040] It is worth mentioning that a strip-shaped through groove 467 is provided on the left side of the screening frame 41, corresponding to the position of the moving rod 465. The strip-shaped through groove 467 provides horizontal movement space for the moving rod 465, while restricting the vertical displacement of the moving rod 465 to ensure precise cleaning action. The moving rod 465 passes through the strip-shaped through groove 467. The structural design of the moving rod 465 passing through the strip-shaped through groove 467 realizes the power transmission and action synchronization inside and outside the screening frame 41.

[0041] Among them, the centrifugal fan 3, the small motor 463, and the vibration drive mechanism are existing technologies and will not be described in detail; at the same time, this utility model also includes a power supply, a controller, and a switch, which are not the main technical points of this patent and will not be described in detail.

[0042] Working principle and process: The grain to be screened is poured into hopper 2. The inclined structure of hopper 2 guides the grain to flow evenly towards the discharge port. Subsequently, centrifugal fan 3 starts, and the generated airflow performs air separation on the grain falling from the discharge port, separating out shriveled grains, dust and other light impurities. The air-separated grain falls onto the large-hole screen 42 of the screening mechanism 4. At the same time, the vibration drive mechanism on the left side of the screening frame 41 drives the screening frame 41 to vibrate, causing the grain to spread evenly on the large-hole screen 42. Large particles of impurities (such as large stones and straw pieces) are intercepted by the large-hole screen 42 and discharged through the large particle impurity discharge plate 5. The grain that passes through the large-hole screen 42 falls onto the lower small-hole screen 43, where small particles of impurities (such as small soil particles) are further separated. The small impurities are collected through the small particle impurity discharge plate 7, and the qualified clean grain flows out through the clean grain discharge plate 6. During this process, the brush cleaning component 46 operates synchronously, and the small motor... The drive screw 461 rotates, causing the displacement block 464 to move horizontally along the positioning slide bar 462. The moving rod 465 connected to the displacement block 464 moves through the strip groove 467, causing the flexible strip 466 at the bottom to slide back and forth on the large-hole screen 42 and the small-hole screen 43, automatically clearing the screen hole blockage. If the screen needs to be replaced or cleaned, the pull block 455 of the locking component 45 can be operated to lift the pull rod 454, causing the movable plate 452 to compress the return spring 453, so that the positioning rod 456 is removed from the positioning hole 458 of the fixed ear 457. The screen can be pulled out by the handle 48, and after cleaning or replacement, the screen can be inserted again. The pull block 455 is released, and the return spring 453 pushes the movable plate 452 down, so that the positioning rod 456 is re-embedded in the positioning hole 458, completing the screen locking. The entire equipment is supported by a mobile frame 1 and can be flexibly moved to different working positions to adapt to various screening scenarios.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-functional grain screening machine, comprising a mobile frame (1), characterized in that: A hopper (2) is installed on the mobile frame (1). A centrifugal fan (3) is provided on the right side of the discharge port of the hopper (2). The centrifugal fan (3) is installed on the mobile frame (1). The blowing direction of the centrifugal fan (3) corresponds to the discharge position of the hopper (2). A screening mechanism (4) is provided below the centrifugal fan (3). The screening mechanism (4) is installed on the mobile frame (1). The screening mechanism (4) includes a screening frame (41). A vibration drive mechanism installed on a mobile frame (1) is connected to the left side of the screening frame (41). Large-hole screens (42) and small-hole screens (43) are installed on the inner side of the screening frame (41) and are arranged vertically. Positioning guide grooves (44) are provided on the inner wall of the screening frame (41) at positions corresponding to the large-hole screens (42) and small-hole screens (43). The front sides of the large-hole screens (42) and small-hole screens (43) are connected to the screening frame (41) through locking components (45). Brush cleaning components (46) are installed on the screening frame (41) at positions corresponding to the large-hole screens (42) and small-hole screens (43).

2. The multifunctional grain screening machine according to claim 1, characterized in that: The large-hole screen (42) and the small-hole screen (43) are respectively attached to the right side of the large-particle impurity discharge plate (5) and the clean grain discharge plate (6). The bottom right end of the screening frame (41) is provided with a small-particle impurity discharge plate (7). The large-particle impurity discharge plate (5), the clean grain discharge plate (6), and the small-particle impurity discharge plate (7) are all fixedly connected to the screening frame (41).

3. The multifunctional grain screening machine according to claim 1, characterized in that: The front side of the screening frame (41) is provided with guide positioning grooves (47) at positions corresponding to the large-hole screen (42) and the small-hole screen (43).

4. The multifunctional grain screening machine according to claim 1, characterized in that: The locking assembly (45) includes a fixed housing (451) fixed to the front side of the screening frame (41). A movable plate (452) is disposed inside the fixed housing (451). A return spring (453) is connected to the top of the movable plate (452). The return spring (453) is located inside the fixed housing (451). A pull rod (454) is disposed inside the return spring (453). The bottom end of the pull rod (454) is fixedly connected to the movable plate (452). The top of the pull rod (454) passes through the fixed shell (451) and is connected to the pull block (455). The bottom of the movable plate (452) is fixedly connected to the positioning rod (456). The front sides of the large-hole screen (42) and the small-hole screen (43) are fixedly connected to the positioning rod (456) at the corresponding positions. The positioning ears (457) are provided with positioning holes (458) on the fixing ears (457). The bottom end of the positioning rod (456) extends into the positioning hole (458).

5. A multifunctional grain screening machine according to claim 1, characterized in that: Handles (48) are fixedly connected to the front sides of both the large-hole screen (42) and the small-hole screen (43).

6. A multifunctional grain screening machine according to claim 1, characterized in that: The brush cleaning assembly (46) includes a lead screw (461) and a positioning slide rod (462) arranged vertically on the left side of the screening frame (41). One end of the lead screw (461) is connected to a small motor (463). A displacement block (464) is connected between the lead screw (461) and the positioning slide rod (462). Two moving rods (465) are fixedly connected to the right side of the displacement block (464). A flexible strip (466) is provided at the bottom of the moving rod (465). The upper and lower flexible strips (466) slide and fit against the upper surfaces of the large-hole screen (42) and the small-hole screen (43), respectively.

7. A multifunctional grain screening machine according to claim 6, characterized in that: A strip-shaped through groove (467) is provided on the left side of the screening frame (41) at the position corresponding to the moving rod (465), and the moving rod (465) passes through the strip-shaped through groove (467).

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