An air screen cleaner

Abstract

The utility model relates to agricultural grain processing machinery technical field discloses a kind of wind sieve cleaner, including cleaner main body and the inlet of fixed connection in the front side of cleaner main body, the bottom wall of inlet is connected with winnowing device, the top wall rear side of winnowing device is fixedly installed with fan, the right side of fan is connected with sandkong, the bottom of sandkong is connected with dust discharge port, the outer wall right side of winnowing device is connected with light impurity discharge port, the bottom wall of winnowing device is connected with drum screen by feeding hopper, drum screen is rotatably connected in the inside of cleaner main body and is driven rotation by rotor power device, and drum screen includes five screen meshes that are sequentially connected along axial direction. The utility model pre-removes dust and light impurities by winnowing device, and different size particle impurities are accurately classified and screened by cooperating multi-section rotary drum screen, effectively prevent screen mesh from being blocked, and significantly improve the cleaning purity and operation efficiency of grain.

Description

Technical Field

[0001] This utility model relates to the field of agricultural grain processing machinery technology, and in particular to a wind-screen cleaning machine. Background Technology

[0002] In the initial processing of agricultural grains after harvest, the raw grain material often contains various types of foreign matter and impurities. These impurities include not only lighter rice husks, shriveled grains, and dust raised during harvesting, but also small particles such as sand and grass seeds smaller than grains, as well as larger particles such as straw and clods of soil. If these impurities are not thoroughly and properly cleaned, they will seriously affect the safety of subsequent grain storage and the quality of the finished product. Existing grain cleaning technologies use single vibrating screening equipment or simple wind-driven winnowing equipment for operation.

[0003] However, while existing single screening equipment can remove solid impurities such as stones by utilizing the physical size differences of the mesh openings, it cannot effectively separate dust and empty husks that are similar in size to grains but lighter in weight. This results in a high impurity rate in the cleaned grains. While simple wind-powered equipment can remove light impurities, it cannot remove heavy stones or perform precise grading and screening. As a result, in order to obtain clean grains, materials often need to be transferred and processed multiple times between different devices. This not only greatly increases the labor intensity and time cost of the cleaning operation, but also, since existing screening mechanisms mostly use flat screens, the mesh openings are prone to clogging when processing wet or high-impurity grains, leading to a significant decrease in cleaning efficiency.

[0004] Therefore, this utility model proposes an air-screen cleaning machine to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the fact that existing traditional grain cleaning equipment is difficult to remove dust and light impurities and solid impurities in a single process, resulting in the need for multiple transfer and processing steps, which increases labor intensity and time costs, and that conventional flat screens are prone to mesh blockage when processing grains with high impurity content, resulting in low cleaning efficiency and poor grading effect, this utility model aims to provide a wind-screen cleaning machine with an improved structure that can effectively solve the above problems.

[0006] This utility model provides an air-screen cleaning machine, including: a cleaning machine body, and a feed inlet fixedly connected to the front side of the cleaning machine body. The bottom wall of the feed inlet is connected to an air-screening device. A handle is fixedly installed on the front side of the outer wall of the air-screening device. A fan is fixedly installed on the rear side of the top wall of the air-screening device. A three-phase asynchronous motor is fixedly installed on the top wall of the fan. A cyclone separator is connected to the right side of the fan. A dust outlet is connected to the bottom of the cyclone separator. A light impurity outlet is connected to the right side of the outer wall of the air-screening device. A feed hopper is connected to the bottom wall of the air-screening device. A drum screen is connected to the outer wall of the feed hopper.

[0007] The drum screen is rotatably connected to the interior of the cleaning machine body. A rotor power unit is installed on the rear side of the outer wall of the drum screen. The drum screen includes a first screen, a second screen, a third screen, a fourth screen, and a fifth screen connected in sequence. The bottom of the first screen is connected to a small impurity discharge port, the bottom of the second screen is connected to a small impurity discharge port, the bottom of the third, fourth, and fifth screens is connected to a discharge hopper, the bottom of the discharge hopper is connected to a grain discharge port, and the bottom of the tail end of the drum screen is connected to a large impurity discharge port.

[0008] Preferably, the air separator is located between the feed inlet and the feed hopper, the air intake of the fan is connected to the interior of the air separator, the output shaft of the three-phase asynchronous motor is connected to the impeller of the fan, the three-phase asynchronous motor is used to drive the fan to generate negative pressure airflow, and the cyclone separator is used to separate dust through centrifugal sedimentation and discharge it through the dust outlet.

[0009] Preferably, the cyclone separator is fixedly installed on the right side wall of the air classifier, the dust outlet is located at the bottom of the cone of the cyclone separator, the light impurity outlet is located on the side wall of the air classifier and below the cyclone separator, and the diameter of the light impurity outlet is larger than the diameter of the dust outlet.

[0010] Preferably, the feed hopper has a funnel-shaped structure, with the upper end of the feed hopper fixedly connected to the bottom wall opening of the air classifier, and the lower end of the feed hopper extending obliquely into the feed end of the first section of the drum screen. The feed hopper is used to guide the material after air classification into the drum screen.

[0011] Preferably, the rotor power unit is fixedly installed on the rear outer wall of the main body of the cleaning machine. The rotor power unit has a drive shaft that passes through the rear wall of the main body of the cleaning machine and is fixedly connected to the center of the rear end of the drum screen. The rotor power unit is used to drive the drum screen to rotate around the central axis of the drum screen.

[0012] Preferably, the first, second, third, fourth, and fifth screen sections are fastened with interlocking clips, allowing for detachable and replaceable structures, and the first, second, third, fourth, and fifth screen sections are arranged coaxially along the axial direction of the drum screen.

[0013] Preferably, the small impurity discharge ports corresponding to the first and second screen sections are both independently set collection tank structures, and a partition is set between the small impurity discharge ports to prevent impurities screened out at different stages from mixing.

[0014] Preferably, the discharge hopper is a conical trough that is wider at the top and narrower at the bottom. The length of the upper opening of the discharge hopper covers the horizontal projection area of ​​the third, fourth, and fifth screen sections, and the grain discharge port is located at the bottom of the discharge hopper where the grains converge.

[0015] Preferably, the large impurity discharge port is located at the bottom of the main body of the cleaning machine and directly below the end discharge port of the drum screen. The large impurity discharge port, the discharge hopper, the small impurity discharge port, and the small impurity discharge port are arranged sequentially and alternately in the front-to-back direction at the bottom of the main body of the cleaning machine.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model solves the problem of incomplete cleaning caused by existing grain cleaning equipment being unable to remove both light dust and solid impurities in a single process by setting an air separation device integrating a fan and a cyclone separator below the feed inlet and connecting it to a five-section drum screen at the rear end. It achieves the effect of first using negative pressure airflow to remove light impurities such as dust and rice husks, and then using multi-stage screens to physically separate small and large impurities, thereby greatly improving the purity of grains and cleaning efficiency.

[0018] 2. This utility model solves the problem that traditional cleaning machines cannot accurately grade impurities of different sizes mixed in grains by using a drum screen structure composed of multiple sections of screens with different apertures connected sequentially along the axial direction. It achieves the effect of using the small aperture screen at the front to filter out fine sand and gravel, using the large aperture screen in the middle and rear to screen out high-quality grains, and using the tail end to discharge large impurities such as straw, thus realizing the effect of accurate separation and collection of five levels of materials in one feeding.

[0019] 3. This utility model solves the problem of reduced screening efficiency caused by mesh clogging in traditional flat screens by using a rotor power device to drive an inclined drum screen for rotational screening. It achieves the effect of using the combination of rotational centrifugal force and gravity to make the material continuously roll and jump in the screen, effectively preventing the material from getting stuck in the mesh, thus ensuring the long-term continuous and stable operation of the equipment. Attached Figure Description

[0020] Figure 1 This is a perspective view of an air-screen cleaning machine proposed in this utility model;

[0021] Figure 2 This is a front view of an air-screen cleaning machine proposed in this utility model;

[0022] Figure 3 This is a right view of an air-screen cleaning machine proposed in this utility model;

[0023] Figure 4 This is a partial structural schematic diagram of an air-screen cleaning machine proposed in this utility model.

[0024] Legend:

[0025] 1. Feed inlet; 2. Air separator; 3. Blower; 4. Shaclolen; 5. Feed hopper; 6. Cleaner body; 7. Drum screen; 701. First section screen; 702. Second section screen; 703. Third section screen; 704. Fourth section screen; 705. Fifth section screen; 8. Rotor power unit; 9. Light impurity discharge port; 10. Dust discharge port; 11. Discharge hopper; 111. Large impurity discharge port; 112. Grain discharge port; 113. Small impurity discharge port one; 12. Small impurity discharge port two; 13. Three-phase asynchronous motor; 14. Handle. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] Example:

[0028] Please refer to Figures 1 to 4 This utility model provides an air-screen cleaning machine, which aims to solve the problems that existing cleaning equipment often cannot efficiently separate dust, light impurities, small impurities of different sizes, large impurities and qualified grains in a continuous process, and the screen is prone to clogging, resulting in low cleaning efficiency and poor grading effect.

[0029] Please refer to Figure 1 and Figure 2A wind-screen cleaning machine includes a main body 6 and a feed inlet 1 fixedly connected to the front side of the main body 6. The feed inlet 1 is used to receive the grain raw material to be cleaned. The bottom wall of the feed inlet 1 is connected to a wind-screening device 2, which serves as a primary processing unit before the material enters the screening process. A handle 14 is fixedly installed on the front side of the outer wall of the wind-screening device 2. The handle 14 is fixed to the outer wall of the wind-screening device 2 by bolt connection for easy gripping and maintenance by the operator. A fan is fixedly installed on the rear side of the top wall of the wind-screening device 2. 3. The blower 3 provides negative pressure power for the entire air separation process. A three-phase asynchronous motor 13 is fixedly installed on the top wall of the blower 3. The output shaft of the three-phase asynchronous motor 13 is connected to the internal impeller of the blower 3 to drive the blower 3. A cyclone separator 4 is connected to the right side of the blower 3. The cyclone separator 4 is used as a gas-solid separation device to settle dust in the airflow. A dust outlet 10 is connected to the bottom of the cyclone separator 4. A light impurity outlet 9 is connected to the right side of the outer wall of the air separation device 2. A feed hopper 5 is connected to the bottom wall of the air separation device 2. The outer wall of the feed hopper 5 is connected to a rotary screen 7. The feed hopper 5 guides the material after air separation to the screening system. The rotary screen 7 is rotatably connected to the interior of the cleaning machine body 6. A rotor power unit 8 is installed on the rear side of the outer wall of the rotary screen 7. The rotor power unit 8 drives the rotary screen 7 to rotate around its own axis. The rotary screen 7 includes a first screen 701, a second screen 702, a third screen 703, a fourth screen 704, and a fifth screen 705 connected sequentially along the axial direction. The first screen 701... The lower part of the first screen 702 is connected to a small impurity discharge port 12. The lower part of the second screen 702 is connected to a small impurity discharge port 113. The bottom areas of the third screen 703, the fourth screen 704 and the fifth screen 705 are connected to a discharge hopper 11. The lower end of the discharge hopper 11 is equipped with a grain discharge port 112. The lower end of the drum screen 7 is equipped with a large impurity discharge port 111. Through the organic combination of the above components, a wind-screen cleaning machine forms a comprehensive processing platform that integrates wind-screen dust removal and multi-stage screening.

[0030] Please refer to Figure 1 , Figure 2 and Figure 4The air classifier 2 is located directly below the feed inlet 1 and is welded or flanged to the bottom wall of the feed inlet 1. A vertically oriented air classifier channel is formed inside the air classifier 2 for material passage. A fan 3 is bolted to the rear side of the top wall of the air classifier 2. The air intake of the fan 3 connects downwards to the internal channel of the air classifier 2. A three-phase asynchronous motor 13 is fixedly mounted on the top of the fan 3 via a base. The output shaft of the three-phase asynchronous motor 13 passes vertically downwards through the housing of the fan 3 and is keyed to the impeller hub inside the fan 3. The high-speed rotation of the three-phase asynchronous motor 13 drives the fan 3 to generate an upward negative pressure airflow within the air classifier 2. The exhaust vent is tangentially connected to the air inlet of the cyclone separator 4 located on the right side via a pipe. The cyclone separator 4 is fixed to the outer wall of the main body 6 of the cleaning machine or the side wall of the air classifier 2 by a bracket. The bottom conical section of the cyclone separator 4 is connected to a dust outlet 10. The dust outlet 10 is used to collect and discharge dust particles separated and settled by centrifugal force. A rectangular or circular impurity discharge port is also opened on the upper right side wall of the air classifier 2 and connected to a light impurity discharge port 9. The light impurity discharge port 9 extends obliquely downward to discharge rice husks and shriveled grains carried out by the airflow outside the machine. A handle 14 is fixed to the front outer wall of the air classifier 2 by screws. The handle 14 has a U-shaped structure for easy gripping by the operator.

[0031] Meanwhile, a feed hopper 5 is fixedly connected to the bottom funnel-shaped opening of the air classifier 2. The feed hopper 5 has an inverted conical structure. The top flange of the feed hopper 5 is sealed to the bottom flange of the air classifier 2. The lower discharge pipe of the feed hopper 5 extends backward and downward at an angle and passes through the front panel of the main body 6 of the cleaning machine. The lower discharge pipe of the feed hopper 5 is directly inserted into the front opening of the drum screen 7. The outer diameter of the lower discharge pipe of the feed hopper 5 is smaller than the inner diameter of the first section of the screen 701 of the drum screen 7. The feed hopper 5 and the drum screen 7 are in a non-contact clearance fit. This structure ensures that the material slides smoothly from the air classifier 2 into the rotating drum screen 7 under the action of gravity, while avoiding interference and wear between the rotating parts and the stationary parts.

[0032] As a preferred embodiment, to achieve precise grading and screening of materials with different particle sizes, the main structure of the drum screen 7 consists of five cylindrical screen sections: a first screen 701, a second screen 702, a third screen 703, a fourth screen 704, and a fifth screen 705, which are sequentially fastened together axially. This structure is detachable and replaceable, and the centerlines of the five screen sections coincide. The drum screen 7 is installed at an angle inside the main body 6 of the cleaning machine. The front end of the drum screen 7, i.e., the feed end, is higher than the rear end, i.e., the discharge end. The mesh size of the first screen 701 and the second screen 702 is smaller than the diameter of a standard grain. A separate small impurity discharge port 2 12 is located directly below the first screen 701, and a separate small impurity discharge port 113 is located directly below the second screen 702. Both the small impurity discharge port 2 12 and the small impurity discharge port 113... The collection trough is funnel-shaped and fixed to the base frame of the cleaning machine body 6 by a bracket. A partition is provided between the two to prevent mixing. The mesh size of the third screen 703, the fourth screen 704 and the fifth screen 705 is larger than the diameter of the standard grains but smaller than the size of large impurities. A through rectangular discharge hopper 11 is provided directly below these three screens. The upper opening edge of the discharge hopper 11 is fixed to the inner wall of the cleaning machine body 6 and covers the projection area of ​​the three screens. The bottom of the discharge hopper 11 is connected to the grain discharge port 112. The grain discharge port 112 extends to the outside through the bottom plate of the cleaning machine body 6. The large impurity discharge port 111 is provided directly below the end opening of the fifth screen 705 of the drum screen 7. The large impurity discharge port 111 is fixed to the bottom rear end of the cleaning machine body 6 and is used to receive large particles of impurities that have not passed through the screen.

[0033] In another preferred embodiment, in order to drive the drum screen 7 to rotate smoothly, the rotor power unit 8 includes a motor, a reducer and a transmission shaft assembly. The rotor power unit 8 is fixedly installed on the outer wall of the rear end of the cleaning machine body 6 by bolts. The output shaft of the rotor power unit 8 passes horizontally through the bearing seat on the rear wall plate of the cleaning machine body 6 and extends into the interior of the cleaning machine body 6. The end of the output shaft of the rotor power unit 8 is connected and fixed to the central hub key at the rear end of the drum screen 7 by a flange or coupling. The rotor power unit 8 drives the drum screen 7 to rotate continuously around the central axis, thereby driving the internal material to tumble and move forward.

[0034] Working principle: When the operator moves the equipment to the working position with the help of handle 14 and connects the power, the three-phase asynchronous motor 13 starts and drives the fan 3 to rotate at high speed, thereby generating an upward negative pressure airflow inside the air classifier 2. The grain raw material to be processed continuously enters the vertical channel of the air classifier 2 through the feed port 1. During the fall of the grain, the negative pressure airflow sucks the dust entrained in the grain into the fan 3 and then presses it into the cyclone 4. After centrifugal separation and sedimentation in the cyclone 4, the dust is discharged through the dust outlet 10 at the bottom. At the same time, the lighter impurities such as husks and shriveled grains are carried by the airflow and discharged from the light impurity outlet 9 above the side wall of the air classifier 2, while the heavier grain particles overcome the airflow resistance and fall into the feed hopper 5 at the bottom.

[0035] After being separated by air, the grains slide down the inclined surface of the feed hopper 5 into the first section of the screen 701 of the drum screen 7. At this time, the rotor power unit 8 drives the drum screen 7 to rotate continuously around its own axis. Since the drum screen 7 is arranged at an angle, the grains tumble on the inner wall of the drum screen 7 and move backward under the combined action of gravity and centrifugal force. When the grains pass through the first section of the screen 701 and the second section of the screen 702, since the mesh diameter of these two sections of the screen is designed to be smaller than the standard grain diameter, the fine sand, gravel and grass seeds mixed in the grains pass through the mesh and fall down, and are collected and discharged in the corresponding small impurity discharge port 2 12 and small impurity discharge port 113 below.

[0036] As the drum screen 7 continues to rotate, the unscreened material continues to be conveyed to the third screen 703, the fourth screen 704, and the fifth screen 705. Since the mesh diameter of these three screens is designed to be larger than the standard grain diameter but smaller than the size of large impurities, qualified and plump high-quality grains pass through the mesh and fall into the discharge hopper 11 below, and then collect at the grain discharge port 112 to be discharged as finished products. However, large impurities such as straw and stones cannot pass through the mesh and can only roll along the inner wall of the drum screen 7 to the end opening of the drum screen 7, and finally fall into the large impurity discharge port 111 below for discharge. This achieves thorough separation and grading of dust, light impurities, small impurities, and large impurities in the grain raw materials.

Claims

1. A wind-screen cleaning machine, comprising: The main body of the cleaning machine (6) and the feed inlet (1); Its features are, The bottom wall of the feed inlet (1) is connected to an air classifier (2). A handle (14) is fixedly installed on the front side of the outer wall of the air classifier (2). A fan (3) is installed on the rear side of the top wall of the air classifier (2). A three-phase asynchronous motor (13) is fixedly installed on the top wall of the fan (3). A cyclone separator (4) is connected to the right side of the fan (3). A dust outlet (10) is connected to the bottom of the cyclone separator (4). A light impurity outlet (9) is connected to the right side of the outer wall of the air classifier (2). The bottom wall of the hopper (5) is connected to the feed hopper (5), the outer wall of the feed hopper (5) is connected to the drum screen (7), the drum screen (7) is rotatably connected to the interior of the main body (6) of the cleaning machine, the rotor power device (8) is installed on the rear side of the outer wall of the drum screen (7), the air separation device (2) is located between the feed inlet (1) and the feed hopper (5), the air intake of the blower (3) is connected to the interior of the air separation device (2), and the output shaft of the three-phase asynchronous motor (13) is connected to the impeller of the blower (3) via a drive.

2. The air-screen cleaning machine according to claim 1, characterized in that, The drum screen (7) includes a first screen section (701), a second screen section (702), a third screen section (703), a fourth screen section (704), and a fifth screen section (705) connected in sequence. The first screen section (701) is connected to a small impurity discharge port two (12) below it. The second screen section (702) is connected to a small impurity discharge port one (113) below it. The bottom of the third screen section (703), the fourth screen section (704), and the fifth screen section (705) is connected to a discharge hopper (11). The lower end of the discharge hopper (11) is connected to a grain discharge port (112). The lower end of the drum screen (7) is connected to a large impurity discharge port (111).

3. The air-screen cleaning machine according to claim 1, characterized in that, The cyclone separator (4) is fixedly installed on the right side wall of the blower (3), the dust outlet (10) is located at the bottom of the cone of the cyclone separator (4), and the light impurity outlet (9) is located on the side wall of the air classifier (2).

4. The air-screen cleaning machine according to claim 2, characterized in that, The upper end of the feed hopper (5) is fixedly connected to the bottom wall opening of the air separation device (2), and the lower end of the feed hopper (5) extends obliquely into the feed end of the first section of the screen (701) of the drum screen (7).

5. The air-screen cleaning machine according to claim 1, characterized in that, The rotor power unit (8) is fixedly installed on the rear outer wall of the cleaning machine body (6). The rotor power unit (8) has a drive shaft that passes through the rear wall of the cleaning machine body (6) and is fixedly connected to the rear center of the drum screen (7).

6. The air-screen cleaning machine according to claim 2, characterized in that, The first section screen (701), the second section screen (702), the third section screen (703), the fourth section screen (704), and the fifth section screen (705) are fastened together and can be disassembled and replaced. The first section screen (701), the second section screen (702), the third section screen (703), the fourth section screen (704), and the fifth section screen (705) are arranged coaxially along the axis of the drum screen (7).

7. The air-screen cleaning machine according to claim 2, characterized in that, The small impurity outlet 2 (12) corresponding to the first section of screen (701) and the small impurity outlet 1 (113) corresponding to the second section of screen (702) are both independently set collection tank structures, and a partition is provided between the small impurity outlet 2 (12) and the small impurity outlet 1 (113).

8. The air-screen cleaning machine according to claim 2, characterized in that, The discharge hopper (11) is a conical trough that is wider at the top and narrower at the bottom. The upper opening of the discharge hopper (11) covers the horizontal projection area of ​​the third screen (703), the fourth screen (704), and the fifth screen (705). The grain discharge port (112) is located at the bottom of the discharge hopper (11).

9. A wind-screen cleaning machine according to claim 2, characterized in that, The large impurity discharge port (111) is located at the bottom of the main body of the cleaning machine (6) and directly below the end discharge port of the drum screen (7). The large impurity discharge port (111), the discharge hopper (11), the small impurity discharge port one (113), and the small impurity discharge port two (12) are arranged sequentially at intervals along the front-back direction at the bottom of the main body of the cleaning machine (6).

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