A grain impurity removing device

Abstract

This utility model discloses a grain impurity removal device, including a shell, a rotary screen cylinder rotatably mounted inside the shell, a hopper fixed to the left end of the shell, a drive assembly for driving the rotary screen cylinder to rotate fixed to the right side of the shell, a discharge port and a door panel installed on the front side of the shell, a suction mechanism near the discharge port, a blowing pipe horizontally arranged inside the rotary screen cylinder, an air nozzle connected to an air pump on the lower side of the blowing pipe, spiral blades on the inner wall of the rotary screen cylinder, screen holes on the outer wall, a retaining ring inside the left port, a gear ring on the right end, a motor and a drive gear, a cover on the upper end of the shell, and a fan, a screen cover, and a filter plate. This device achieves continuous screening through the rotation of the rotary screen cylinder in conjunction with the spiral blades, removes attached impurities through multi-point blowing by the air nozzle, and centrally sucks up and cleans the dust under the screen through the suction mechanism, effectively improving the cleanliness of grain screening and simplifying subsequent cleaning operations.

Description

Technical Field

[0001] This utility model belongs to the technical field of grain processing equipment, specifically relating to a grain impurity removal device. Background Technology

[0002] During the harvesting, transportation, and storage of grains, non-grain impurities such as mud, rice husks, wheat awns, straw fragments, and fine dust are often introduced. These impurities not only affect the quality of the grain but may also cause mold, pests, and other problems during subsequent processing, storage, and use, and even threaten food safety. Therefore, impurity removal is an essential basic process in grain processing.

[0003] Currently, most impurity removal equipment on the market primarily uses physical sieving to initially remove impurities, with some devices incorporating air separation mechanisms to remove lighter impurities. However, existing technologies have the following shortcomings: First, some impurity removal devices rely solely on sieve openings, lacking a power drive to assist in grain flow, resulting in low sieving efficiency and problems such as grain accumulation and incomplete sieving; second, traditional air separation devices mostly only have blowing or suction structures on one side, resulting in a single impurity separation direction, which easily causes dust and light impurities to remain in the grain, affecting the final cleanliness; third, the collection effect of impurities is poor, the device is inconvenient to clean, and it affects subsequent usage efficiency. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a grain impurity removal device that can achieve high screening efficiency, more thorough impurity removal and easy cleaning, which has become a technical problem that urgently needs to be solved in this field.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A grain impurity removal device includes a housing, a rotary screen cylinder rotatably mounted on the inner side of the housing, a hopper for feeding material into the rotary screen cylinder fixed at the left end of the housing, the rotary screen cylinder transversely penetrating the housing, a drive assembly for driving the rotary screen cylinder to rotate fixed on the right side of the housing, a discharge port provided on the front side of the housing, and an openable door panel installed at the discharge port.

[0007] A suction mechanism is installed near the discharge port of the shell to draw air inwards. A blower pipe is inserted horizontally inside the drum screen to blow air downwards. The blower pipe is connected to an air pump through a pipeline.

[0008] Furthermore, the left end of the blower pipe has a fixed bracket, and the lower side of the blower pipe has multiple air nozzles evenly arranged from left to right, with the fixed bracket fixed to the left end of the housing.

[0009] Furthermore, the outer surface of the rotary screen cylinder is provided with uniformly arranged screen holes, and the inner surface of the rotary screen cylinder is fixed with spiral blades. An annular retaining ring is fixed at the inner side of the left port of the rotary screen cylinder, and a gear ring that is connected to the drive assembly is fixed near the right end of the rotary screen cylinder.

[0010] Furthermore, the drive assembly includes a motor fixed to the right end of the housing, and a drive gear that meshes with a gear ring is fixed on the output shaft of the motor.

[0011] Furthermore, the upper end of the housing is open, and an inverted U-shaped cover is installed at the opening. The front side of the housing is provided with a discharge channel that communicates with the discharge port, and the suction mechanism is installed on the top of the discharge channel.

[0012] Furthermore, the suction mechanism includes a fan, with a mesh cover and a filter plate fixed at both ends of the upper part of the fan.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention features a transversely penetrating rotary screen cylinder within the housing, which, combined with a drive assembly, rotates continuously. The screen holes are used to sieve foreign objects and impurities in the grain by size. Simultaneously, spiral blades inside the rotary screen cylinder propel the grain to the right, making the screening process continuous and efficient. This avoids the problem of incomplete screening caused by short screening paths or poor propulsion in existing devices.

[0015] This invention solves the problems of single-direction airflow and poor dust removal effect of existing air separation structures by setting an air pipe with a jet nozzle inside the rotary screen cylinder and connecting the air pipe to an air pump to achieve multi-point airflow cleaning of the grain surface, which can remove dust and light impurities attached to the grain particles.

[0016] This invention features a suction mechanism at the discharge port of the housing, and a fan, filter plate, and mesh structure are configured in the suction channel. While removing impurities under the screen, it further removes and centrally processes dust and light impurities through negative pressure suction, effectively preventing impurities from remaining inside the device and solving the problems of serious impurity residue and cumbersome cleaning in traditional devices.

[0017] This utility model, by setting a cover on the top of the shell and an openable door panel at the front end, and using it in conjunction with the discharge channel structure, allows operators to easily observe the impurity removal process and clean up accumulated impurities in a timely manner, improving the ease of use and efficiency of later maintenance of the equipment, and further overcoming the shortcomings of existing devices that are not easy to clean and have long maintenance cycles. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the blower tube of this utility model;

[0020] Figure 3 This is a schematic diagram of the rotary screen cylinder of this utility model;

[0021] Figure 4 This is a schematic diagram of the drive component of this utility model;

[0022] Figure 5 This is a schematic diagram of the outer casing of this utility model;

[0023] Figure 6 This is a schematic diagram of the suction mechanism of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Shell; 2. Rotary screen cylinder; 21. Retaining ring; 22. Spiral blade; 23. Screen hole; 24. Gear ring; 3. Air blowing pipe; 31. Fixed bracket; 32. Air nozzle; 4. Hopper; 5. Cover; 51. Side guard; 6. Suction mechanism; 61. Mesh cover; 62. Fan; 63. Filter plate; 7. Door panel; 8. Drive assembly; 81. Motor; 82. Drive gear. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] like Figure 1As shown, a grain impurity removal device includes a housing 1, a rotary screen 2 rotatably mounted inside the housing 1, and a hopper 4 for feeding material into the rotary screen 2 fixed at the left end of the housing 1. The rotary screen 2 extends transversely through the housing 1. A drive assembly for rotating the rotary screen 2 is fixed on the right side of the housing 1. A discharge port is provided on the front side of the housing 1, and an openable door 7 is installed at the discharge port. The housing 1 is made of welded steel plate, forming a closed impurity removal space inside, effectively preventing dust leakage during the impurity removal process. The through-type arrangement of the rotary screen 2 increases the screening throughput, and continuous conveying and... Screening is carried out simultaneously; the hopper 4 is directly connected to the rotary screen cylinder 2 and is set at a high position to facilitate gravity feeding and improve feeding efficiency; the door panel 7 can be flipped open by hinges to facilitate cleaning of impurities at the discharge port; a suction mechanism 6 is installed near the discharge port on the shell 1 to draw air inwards. The suction mechanism 6 is set at the end of the impurity removal to draw away fine impurities and dust from the screen holes, thereby improving the cleanliness of the finished grain; a downward blowing pipe 3 is horizontally inserted inside the rotary screen cylinder 2. The blowing pipe 3 is connected to an air pump through a pipe to blow air onto the surface of the grain particles to break up the attached dust and light impurities, effectively improving the air separation effect.

[0028] like Figure 2 As shown, the left end of the blower pipe 3 has a fixed bracket 31, and multiple jet nozzles 32 evenly arranged on the lower side of the blower pipe 3 are fixed thereon. The fixed bracket 31 is fixed to the left end of the housing 1. The fixed bracket 31 is made of metal to ensure that the blower pipe 3 remains stable and does not shake during operation. The jet nozzles 32 are integrally welded to the blower pipe 3. The jet nozzles 32 have a conical outlet structure, which can form a high-speed fine airflow under the action of the air pump, effectively penetrating the inside of the grain pile and stripping off light impurities and fine powder attached to the surface of the particles. The uniform arrangement of the jet nozzles 32 ensures that the wind covers the entire screening section, improving the uniformity of dust removal and the processing efficiency.

[0029] like Figure 3 As shown, the outer surface of the rotary screen cylinder 2 is provided with uniformly arranged screen holes 23, and the inner surface of the rotary screen cylinder 2 is fixed with spiral blades 22. An annular retaining ring 21 is fixed at the inner side of the left port of the rotary screen cylinder 2, and a gear ring 24 connected to the drive assembly is fixed near the right end of the rotary screen cylinder 2. The screen holes 23 are uniformly distributed on the surface of the screen cylinder with a perforated structure, which is used to screen impurities by size, ensuring that impurities with smaller particle sizes can be separated and discharged in time. The spiral blades 22 are made of steel plate bent and welded to the inner wall of the rotary screen cylinder 2, which is used to push the grain to the right along the axis of the screen cylinder during rotation, so as to realize the continuous conveying function of the material. The retaining ring 21 is set at the left port to prevent the material from flowing back, so as to ensure that the grain can be stably pushed to the right after falling into the rotary screen cylinder 2 from the hopper 4, without falling back. The gear ring 24 is meshed with the motor drive component to realize the stable drive rotation of the rotary screen cylinder 2, and maintain the continuity and efficiency of the impurity removal process.

[0030] like Figure 3 As shown, the drive assembly 8 includes a motor 81 fixed to the right end of the housing 1, and a drive gear 82 that meshes with the gear ring 24 is fixed on the output shaft of the motor 81. The motor 81 is a high-torque motor, which can provide sufficient driving force to drive the screen cylinder to rotate continuously under grain load. The drive gear 82 and the gear ring 24 adopt a helical tooth meshing structure, which effectively reduces meshing impact and operating noise, and improves operating stability. The drive assembly is installed on the support plate at the right end of the housing 1, and is provided with reinforcing ribs to enhance the strength and stability of the motor mounting structure.

[0031] like Figure 5 As shown, the upper end of the housing 1 is open, and an inverted U-shaped cover 5 is installed at the opening. The front side of the housing 1 is provided with a discharge channel that communicates with the discharge port. The suction mechanism 6 is installed on the top of the discharge channel. The cover 5 is made of transparent plastic or tempered glass, which makes it easy to observe the internal operating status. It is tightly connected to the housing 1 by a sealing strip, which can effectively prevent dust from leaking out during the impurity removal process. The discharge channel is located at the front end of the housing 1 and is connected to the door panel 7. The inside is smooth, which facilitates the accumulation and discharge of impurities. The suction mechanism 6 is located above the discharge channel. When the fan is working, it forms an airflow adsorption path, which can efficiently suck out the dust and fine impurities that fall into the screen holes, preventing impurities from accumulating again inside the device.

[0032] like Figure 6 As shown, the suction mechanism 6 includes a fan 62, with a mesh cover 61 and a filter plate 63 fixed at both ends of the upper end of the fan 62. The fan 62 is a centrifugal fan structure, which can provide a continuous and stable negative pressure airflow for impurity suction. The mesh cover 61 is set outside the suction port to prevent foreign objects from being sucked into the fan and damaging the impeller. The filter plate 63 adopts a removable and washable multi-layer filter structure, which can effectively intercept fine dust and floating particles, ensuring that the exhaust gas is clean and does not pollute the external environment, while extending the service life of the fan.

[0033] The working principle of this utility model is as follows: When screening grain for impurities, the grain is poured into the inner side of the hopper 4 and enters the rotary screen 2. At this time, the motor 81 drives the gear ring 24 to rotate the rotary screen 2. The rotating rotary screen 2 uses the spiral blades 22 to push the grain to the right. At the same time, the rotary screen 2 uses the screen holes 23 to screen the impurities in the grain. Meanwhile, the air pump continuously pumps air into the air pipe 3, causing the air nozzle 32 to blow air downwards, blowing off the impurities and dust adsorbed on the grain particles and blowing them away from the grain pile. At this time, the door panel 7 is in the closed state. Then, the fan 62 continuously draws air into the housing 1, thereby further sucking away the impurities and dust through the screen holes 23 on the rotary screen 2, thus completing a more thorough impurity removal process for the grain. The screened impurities and dust will accumulate at the discharge port. Finally, the door panel 7 can be opened for cleaning.

[0034] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A grain impurity removal device, comprising a housing (1), characterized in that: A rotary screen cylinder (2) is rotatably installed on the inner side of the housing (1), and a hopper (4) for feeding material into the rotary screen cylinder (2) is fixed at the left end of the housing (1). The rotary screen cylinder (2) passes through the housing (1) laterally. A drive assembly (8) for driving the rotary screen cylinder (2) to rotate is fixed on the right side of the housing (1). A discharge port is provided on the front side of the housing (1), and an openable door panel (7) is installed at the discharge port. The housing (1) is equipped with a suction mechanism (6) that draws air inward near the discharge port. The inner side of the rotary screen cylinder (2) is transversely inserted with a blower pipe (3) that blows air downward. The blower pipe (3) is connected to an air pump through a pipe.

2. The grain impurity removal device according to claim 1, characterized in that: The left end of the blow pipe (3) has a fixed bracket (31), and a plurality of jet nozzles (32) are fixed on the lower side of the blow pipe (3). The fixed bracket (31) is fixed to the left end of the housing (1).

3. The grain impurity removal device according to claim 1, characterized in that: The outer surface of the sieve cylinder (2) is provided with uniformly arranged sieve holes (23), and the inner surface of the sieve cylinder (2) is fixed with spiral blades (22). An annular retaining ring (21) is fixed at the inner side of the left port of the sieve cylinder (2), and a gear ring (24) that is connected to the drive assembly is fixed near the right end of the sieve cylinder (2).

4. The grain impurity removal device according to claim 3, characterized in that: The drive assembly (8) includes a motor (81) fixed to the right end of the housing (1), and a drive gear (82) that meshes with a gear ring (24) is fixed on the output shaft of the motor (81).

5. The grain impurity removal device according to claim 1, characterized in that: The upper end of the housing (1) is provided with an opening, and an inverted U-shaped cover (5) is installed at the opening. The front side of the housing (1) is provided with a discharge channel communicating with the discharge port, and the suction mechanism (6) is installed on the top of the discharge channel.

6. The grain impurity removal device according to claim 5, characterized in that: The suction mechanism (6) includes a fan (62), and a mesh cover (61) and a filter plate (63) are fixed at both ends of the upper end of the fan (62).

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