Variable frequency winnower

Abstract

The utility model relates to the technical field of winnowing machine, and disclose a kind of frequency conversion winnowing machine, including winnowing frame, the upper end of winnowing frame is equipped with winnowing net cylinder, the top of winnowing net cylinder Both sides are equipped with fixed frame, and the fixed frame is equipped with screening net board inside;The bottom of winnowing net cylinder is equipped with screening bucket a, screening bucket b and screening bucket c from left to right, and the end of winnowing net cylinder is fixedly installed with winnowing pipeline, the top of winnowing frame is equipped with equipment carrier plate, and the equipment carrier plate is equipped with frequency conversion fan;The utility model equipment is electrically connected by adjusting frequency converter and frequency conversion fan, can realize the continuous, accurate regulation of wind speed, satisfy the grading separation demand of different density impurities.

Description

Technical Field

[0001] This utility model relates to the field of air classifier technology, specifically a variable frequency air classifier. Background Technology

[0002] In fields such as agricultural product processing, grain storage, and plastic pellet recycling, material separation and impurity removal are crucial preliminary processes to ensure the quality and efficiency of subsequent production. Traditional air separation equipment currently on the market has gradually revealed numerous technical shortcomings in long-term application, making it difficult to meet the demands for high-precision and high-efficiency separation. Specific problems are as follows:

[0003] Traditional air classifiers mostly use fixed-speed fans, which can only provide a single or limited range of air speeds and cannot flexibly adjust the airflow according to the density differences of impurities in the material. For example, when processing a mixture of heavy impurities such as ironware and stones with light impurities such as hair and lint, a fixed high airflow can blow away qualified materials to separate the heavy impurities, but it can also cause some qualified materials to settle with the heavy impurities. A fixed low airflow can retain qualified materials to separate the light impurities, but it cannot effectively remove the heavy impurities, ultimately resulting in material waste or impurity residue, which seriously affects the separation purity. Therefore, a new technical solution needs to be designed to address this issue. Utility Model Content

[0004] The purpose of this invention is to provide a variable frequency air separator to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a variable frequency air separator, comprising an air separator frame, an air separator screen cylinder mounted on the upper end of the air separator frame, fixed frames mounted on both sides of the top of the air separator screen cylinder, and a screening screen plate mounted inside the fixed frames; screening hoppers a, b, and c are mounted from left to right on the bottom end of the air separator screen cylinder, an air separator pipe is fixedly mounted on the end of the air separator screen cylinder, an equipment carrier plate is mounted on the top of the air separator frame, a variable frequency fan is mounted on the equipment carrier plate, the air separator pipe is connected to the output end of the variable frequency fan, and an adjustable frequency converter is mounted on the equipment carrier plate, the adjustable frequency converter being electrically connected to the variable frequency fan.

[0006] Preferably, the bottom end of the screening screen plate is equipped with a screen, the inner walls on both sides of the screening screen plate are provided with smooth inclined surfaces, the top left and right sides of the screening screen plate are provided with mounting holes evenly spaced, the top end of the fixing frame is provided with a mounting screw groove at the mounting hole, and the mounting hole and mounting screw groove are screwed with bolt bodies.

[0007] Preferably, the bottom end of the bolt body is provided with a circular groove, and the bottom end of the circular groove is provided with a bolt shank, which is screwed into the mounting hole and the mounting screw groove.

[0008] Preferably, a fixing ring is installed on the upper outer end of the bolt rod, and an annular pressure plate, a spring and an annular rubber sheet are fitted on the circumferential surface of the bolt rod, with a compression block installed at the upper edge of the annular rubber sheet.

[0009] Preferably, the outer wall of the bolt body is provided with a smooth surface, and the surface of the smooth surface is provided with anti-slip texture.

[0010] Preferably, a support platform is installed on the top left side of the air classifier frame, a feed hopper is installed on the upper end of the support platform, a feed channel is installed on the side wall of the feed hopper, the feed channel is connected to the screening screen plate, and a discharge port is provided at the end of the air classifier pipe.

[0011] Preferably, the bottom end of the air classifier frame is equipped with a material receiving box a, a material receiving box b, and a material receiving box c, respectively, located directly below the screening hoppers a, b, and c.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention enables continuous and precise adjustment of airflow speed by regulating the electrical connection between the frequency converter and the variable frequency fan, thus meeting the requirements for the graded separation of impurities of different densities. For example, when processing mixed materials, the airflow speed can be increased first to blow qualified materials backward, causing heavy impurities such as ironware and stones to fall into screening hopper a; then the airflow speed can be gradually reduced, allowing light impurities such as hair and lint to be discharged from the outlet through the air separation pipe, while qualified materials fall into screening hopper b. This completely solves the problem of traditional equipment's difficulty in simultaneously separating both heavy and light impurities, significantly improving material purity and separation efficiency, and reducing material waste. Attached Figure Description

[0014] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 This is a rear-view three-dimensional structural schematic diagram provided for this utility model;

[0016] Figure 3 A schematic diagram of the screening screen provided by this utility model;

[0017] Figure 4 A schematic diagram of the bolt body provided by this utility model.

[0018] In the diagram: 1. Air classifier frame; 2. Support platform; 3. Feed hopper; 4. Feed channel; 5. Screening hopper a; 6. Screening screen; 7. Air classifier cylinder; 8. Screening hopper b; 9. Equipment carrier plate; 10. Variable frequency fan; 11. Adjustable frequency converter; 12. Fixing frame; 13. Air classifier pipeline; 14. Discharge port; 15. Screening hopper c; 16. Material receiving box c; 17. Material receiving box b; 18. Material receiving box a; 19. Smooth inclined surface; 20. Screen; 21. Bolt body; 211. Circular groove; 212. Annular rubber sheet; 213. Bolt rod; 214. Extrusion block; 215. Annular pressure plate; 216. Fixing ring; 217. Spring; 218. Smooth surface; 22. Mounting hole. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1-4 As shown, a variable frequency air separator includes an air separator frame 1. An air separator screen cylinder 7 is mounted on the upper end of the air separator frame 1. Fixed frames 12 are installed on both sides of the top of the air separator screen cylinder 7, and screening screen plates 6 are installed inside the fixed frames 12. Screening hoppers a5, b8 and c15 are mounted from left to right on the bottom of the air separator screen cylinder 7. An air separator pipe 13 is fixedly installed at the end of the air separator screen cylinder 7. An equipment carrier plate 9 is mounted on the top of the air separator frame 1. A variable frequency fan 10 is installed on the equipment carrier plate 9. The air separator pipe 13 is connected to the output end of the variable frequency fan 10. An adjustable frequency converter 11 is installed on the equipment carrier plate 9. The adjustable frequency converter 11 is electrically connected to the variable frequency fan 10.

[0021] In the specific implementation process, the air classifier frame 1 adopts a welded frame structure, the air classifier screen cylinder 7 is a sealed cavity, and the bottom end is opened with a discharge port at the position of the screening hopper. The fixed frame 12 is a "U" shaped groove structure. The screening screen plate 6 is installed on the upper end of the two air classifier screen cylinders 7. The air classifier screen cylinder 7 is connected through the air classifier pipe 13 by the frequency converter fan 10, thereby forming a negative pressure on the air classifier screen cylinder 7 to achieve air classification. The wind speed of the frequency converter fan 10 can be adjusted by adjusting the frequency converter 11.

[0022] In some technical solutions, the bottom end of the screening screen plate 6 is equipped with a screen 20, and the inner walls on both sides of the screening screen plate 6 are provided with smooth inclined surfaces 19. The top left and right sides of the screening screen plate 6 are evenly spaced with mounting holes 22. The top of the fixing frame 12 is provided with a mounting screw groove at the mounting hole 22. The mounting hole 22 and the mounting screw groove are screwed with bolt bodies 21.

[0023] In the specific implementation process, the screen 20 adopts a detachable design; the smooth inclined surface 19 is polished to facilitate the flow of raw materials. The mounting screw groove and mounting hole 22 on the fixing frame 12 are in the same position, and are fixed by bolt body 21.

[0024] In some technical solutions, a circular groove 211 is provided at the bottom end of the bolt body 21, and a bolt shank 213 is provided at the bottom end of the circular groove 211. The bolt shank 213 is screwed into the mounting hole 22 and the mounting screw groove. A retaining ring 216 is installed on the upper outer end of the bolt shank 213. An annular pressure plate 215, a spring 217, and an annular rubber sheet 212 are fitted on the circumferential surface of the bolt shank 213. A compression block 214 is installed at the upper edge of the annular rubber sheet 212. The outer wall of the bolt body 21 is provided with a smooth surface 218, and the surface of the smooth surface 218 is provided with anti-slip texture.

[0025] In the specific implementation process, the bolt rod 213 is vertically fixed in the circular groove 211, and the connection between the mesh plate and the fixed frame is achieved by the thread engaging with the mounting screw groove of the fixed frame; the fixing ring 216 restricts the upward displacement of the annular pressure plate, spring 217, and annular rubber sheet 212 to prevent the parts from slipping off the upper end of the bolt rod 213; the annular pressure plate 215 evenly transmits the elastic force of the spring 217 to the annular rubber sheet 212; the spring 217 provides continuous preload to counteract bolt loosening caused by equipment vibration; the annular rubber sheet 212 and the extrusion block 214 fill the gap between the bolt rod 213 and the mounting hole 22 through elastic deformation to achieve sealing and dust prevention; the extrusion block 214 is compressed when the bolt is tightened, which enhances the fit between the rubber sheet and the inner wall of the mounting hole 22; the smooth surface 218 is convenient for hand gripping, and the anti-slip texture increases the friction between the hand and the bolt, preventing slippage during disassembly and improving the ease of operation.

[0026] In some technical solutions, a support platform 2 is installed on the top left side of the air classifier frame 1, a feed hopper 3 is installed on the upper end of the support platform 2, a feed channel 4 is installed on the side wall of the feed hopper 3, the feed channel 4 is connected to the screening screen plate 6, and a discharge port 14 is provided at the end of the air classifier pipe 13.

[0027] In the specific implementation process, the top of the air classifier frame 1 is equipped with a feeding hopper 3 via a support platform 2. The feeding hopper 3 transports the raw materials to the screening screen plate 6 through the feeding channel 4, and the raw materials inside the air classifier pipe 13 can be cleaned through the discharge port 14.

[0028] In some technical solutions, the bottom end of the air classifier frame 1 is equipped with material receiving boxes a18, b17 and c16 respectively, located directly below the screening hoppers a5, b8 and c15.

[0029] In practice, the material receiving boxes adopt an open design, and the three material receiving boxes can receive the raw materials that have passed through the three screening hoppers.

[0030] Working principle:

[0031] The material is first poured into the feed hopper 3, and then enters the screening screen plate 6 through the inclined feed channel 4. The screen 20 at the bottom of the screening screen plate 6 will first filter out large impurities in the material. The smooth inclined surfaces 19 on both sides guide the material to gather in the middle of the screen plate to avoid stagnation. After the material enters the air classifier cylinder 7, the frequency converter 11 is adjusted to control the operation of the frequency converter fan 10. The airflow generated by the fan is sent into the air classifier cylinder 7 through the air classifier pipe 13. The wind speed can be flexibly adjusted by the frequency converter. The screening hoppers a5, b8, and c15 respectively guide the heavy impurities, qualified materials, and transitional light impurities into the corresponding receiving boxes a18, b17, and c16 below.

[0032] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] 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 variable frequency air separator, comprising an air separator frame (1), characterized in that, The upper end of the air separator frame (1) is equipped with an air separator screen cylinder (7), and fixed frames (12) are installed on both sides of the top of the air separator screen cylinder (7). Screening screen plates (6) are installed inside the fixed frames (12). The bottom end of the air separation screen cylinder (7) is equipped with screening buckets a (5), b (8) and c (15) from left to right. The end of the air separation screen cylinder (7) is fixedly installed with an air separation pipe (13). The top of the air separation frame (1) is equipped with an equipment carrier plate (9). A variable frequency fan (10) is installed on the equipment carrier plate (9). The air separation pipe (13) is connected to the output end of the variable frequency fan (10). An adjustable frequency converter (11) is installed on the equipment carrier plate (9). The adjustable frequency converter (11) is electrically connected to the variable frequency fan (10).

2. The variable frequency air separator according to claim 1, characterized in that, The bottom end of the screening plate (6) is equipped with a screen (20). Both sides of the inner wall of the screening plate (6) are provided with smooth inclined surfaces (19). The top of the screening plate (6) is provided with mounting holes (22) evenly spaced on the left and right sides. The top of the fixing frame (12) is provided with a mounting screw groove at the mounting hole (22). The mounting hole (22) and the mounting screw groove are screwed with bolt bodies (21).

3. A variable frequency air separator according to claim 2, characterized in that, The bottom end of the bolt body (21) is provided with a circular groove (211), and the bottom end of the circular groove (211) is provided with a bolt rod (213). The bolt rod (213) is screwed into the mounting hole (22) and the mounting screw groove.

4. A variable frequency air separator according to claim 3, characterized in that, A retaining ring (216) is installed on the upper outer end of the bolt rod (213). An annular pressure plate (215), a spring (217) and an annular rubber sheet (212) are fitted on the circumferential surface of the bolt rod (213). An extrusion block (214) is installed at the upper edge of the annular rubber sheet (212).

5. A variable frequency air separator according to claim 4, characterized in that, The outer wall of the bolt body (21) is provided with a smooth surface (218), and the surface of the smooth surface (218) is provided with anti-slip texture.

6. A variable frequency air separator according to claim 1, characterized in that, A support platform (2) is installed on the top left side of the air classifier frame (1). A feed hopper (3) is installed on the upper end of the support platform (2). A feed channel (4) is installed on the side wall of the feed hopper (3). The feed channel (4) is connected to the screening screen plate (6). An outlet (14) is provided at the end of the air classifier pipe (13).

7. A variable frequency air separator according to claim 1, characterized in that, The bottom end of the air classifier frame (1) is located directly below the screening buckets a (5), b (8) and c (15), and is respectively equipped with a receiving box a (18), a receiving box b (17) and a receiving box c (16).

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