Environment-friendly multi-layer grain impurity removing equipment

Abstract

The utility model relates to grain processing technical field especially is an environmental protection type multilayer grain impurity removal equipment, including vertical screw conveyor, the feed inlet of vertical screw conveyor is provided with storage bin, be provided with the impurity removal mechanism on vertical screw conveyor and be used for grain impurity removal, and the impurity removal mechanism includes: separation subassembly, including the box of fixed in the discharge port lower end of vertical screw conveyor, the inside upper end of box is provided with a plurality of electromagnetic plate, the inside lower end of box is fixed with the shaft seat in the middle, the baffle is rotatably installed on the shaft seat upper end, the outer wall of box is installed with servo motor and is used for driving baffle overturn, the lower end of box is fixed with the discharge gate and the discharge port respectively left and right sides, through adopting staggered electromagnetic plate and automatic overturning baffle structure, the full -automatic adsorption and separation of magnetic impurity are realized, through double -deck vibrating screen net cooperation springing clear net structure, the classification screening of grain particle is completed, realizes the synchronous efficient removal of metal impurity and different granularity impurity.

Description

Technical Field

[0001] This utility model relates to the field of grain processing technology, specifically to an environmentally friendly multi-level grain impurity removal device. Background Technology

[0002] After harvesting, grains are often mixed with impurities such as metal scraps, stones, and chaff. These impurities not only affect the safety of grain storage and processing quality, but also directly relate to the hygiene standards of subsequent food production. According to CN105312235B, an environmentally friendly multi-level grain impurity removal device is disclosed. This technology discloses a technical solution including "a primary cleaning screen, the discharge port of which is connected to the upper end of a discharge pipe, the lower end of which is connected to the inlet of an elevator, the middle part of which is an air separator, and the side wall of which is symmetrically provided with a first and a second opening. The first opening is connected to the air inlet of a blower through an air duct, and the air outlet of the blower is connected to an exhaust pipe. A row of stepped baffles is provided at the first opening." This technology has the technical effect that "grain screened by the primary cleaning screen falls slowly through the baffles in the air separator. By adjusting the appropriate air volume, impurities are completely removed during multiple discharges, improving production efficiency and avoiding waste; in addition, the air separator is made of transparent material, which facilitates the operator's observation." In existing grain impurity removal operations, a single vibrating screen or air separator is often used. Such equipment is difficult to effectively separate magnetic metal debris, side stones, and light impurities at the same time. Due to the significant differences in the physical properties of different types of impurities, the single separation principle has limitations. As a result, metal debris is easily left in the grain flow, while impurities of similar particle size cannot be completely removed due to the lack of targeted separation methods, which directly affects the purity and quality of the finished grain. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an environmentally friendly multi-level grain impurity removal device. By employing an interlaced electromagnetic plate and an automatic flipping baffle structure, it achieves fully automatic adsorption and separation of magnetic impurities. Through a double-layer vibrating screen combined with a bouncing screen cleaning structure, it completes the grading and screening of grain particles, achieving simultaneous and efficient removal of metallic impurities and impurities of different particle sizes.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly multi-level grain impurity removal device, comprising a vertical screw conveyor, a storage bin at the feed inlet of the vertical screw conveyor, and an impurity removal mechanism on the vertical screw conveyor for grain impurity removal, the impurity removal mechanism comprising: The separation assembly includes a box fixed at the lower end of the discharge port of the vertical screw conveyor. Several electromagnetic plates are installed at the upper end of the box. A shaft seat is fixed at the middle of the lower end of the box. A baffle is rotatably installed at the upper end of the shaft seat. A servo motor is installed on the outer wall of the box and is used to drive the baffle to flip. A discharge port and a discharge outlet are fixed on the left and right sides of the lower end of the box, respectively. A screening component is positioned above the separation component and is used for grain screening.

[0005] Preferably, the screening assembly further includes a base located directly below the discharge port, a cylinder being positioned above the base, and several circumferentially arranged springs being installed between the lower outer edge of the cylinder and the upper outer edge of the base. An upper screen frame and a lower screen frame are fixed at the upper and lower ends of the cylinder, respectively. A first discharge port is fixed to the outer wall of the cylinder and located between the upper and lower screen frames. A second discharge port is fixed to the outer wall of the cylinder and located above the upper screen frame. A third discharge port is fixed to the outer wall of the cylinder and located below the lower screen frame. A vibration motor is installed at the lower end of the cylinder.

[0006] Preferably, the screening component further includes a retaining ring fixed inside the upper and lower screen frames, and a plurality of rubber balls are placed inside the retaining ring.

[0007] Preferably, the separation assembly further includes a discharge pipe fixed at the lower end of the discharge port and used to connect to the collection box.

[0008] Preferably, the upper part of the box has several electromagnetic plates arranged in two rows, and the electromagnetic plates in the two rows are arranged symmetrically and alternately.

[0009] Preferably, the separation assembly further includes a valve fixed to the discharge port of the vertical screw conveyor and used to control the start and stop of the material supply.

[0010] Beneficial effects This invention provides an environmentally friendly, multi-level grain impurity removal device. Compared with existing technologies, it has the following advantages: 1. A vertical screw conveyor vertically lifts the grain from the storage silo and feeds it into the separation unit's housing. Inside the housing, the grain first passes through several electromagnetic plates at the upper part of the housing. The strong magnetic field generated by these plates efficiently adsorbs magnetic metal impurities mixed in the grain, completing the first stage of magnetic separation. At this time, the baffle inside the housing is tilted to the right under the drive of a servo motor, allowing the cleaned grain to be smoothly guided along the baffle surface to the discharge port and enter the upper screening unit for subsequent particle size classification. When it is necessary to clean the metal impurities accumulated on the electromagnetic plates, the control system instructs the servo motor to drive the baffle to the left, simultaneously cutting off the power supply to the electromagnetic plates to demagnetize them. This causes the adsorbed metal impurities to fall off the baffle surface under gravity and finally be discharged through the discharge port. This automates the magnetic separation and impurity cleaning process, ensuring that magnetic metal impurities are efficiently and thoroughly separated and collected.

[0011] 2. When the grain falls into the box, it first passes through the magnetic field of the upper electromagnetic plate, which adsorbs most of the magnetic metal impurities. Impurities that are not fully captured will have their falling path changed by the staggered arrangement of the lower electromagnetic plates as the grain continues to fall, and will be captured again by the lower magnetic field. This increases the contact range and contact time between the grain and the strong magnetic field area, and improves the adsorption efficiency and removal rate of fine or hidden magnetic metal impurities in the grain flow. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the separation component in this utility model; Figure 3 This is a cross-sectional structural diagram of the separation component in this utility model; Figure 4 This is a cross-sectional structural diagram of the screening component in this utility model.

[0013] In the diagram: 1. Vertical screw conveyor; 2. Storage silo; 3. Impurity removal mechanism; 31. Separation component; 311. Box body; 312. Electromagnetic plate; 313. Shaft seat; 314. Baffle; 315. Servo motor; 316. Discharge port; 317. Discharge outlet; 318. Discharge pipe; 319. Valve; 32. Screening component; 321. Base; 322. Cylinder; 323. Spring; 324. Upper screen frame; 325. Lower screen frame; 326. First discharge port; 327. Second discharge port; 328. Third discharge port; 329. Vibrating motor; 3210. Retaining ring; 3211. Rubber ball. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0015] Please see Figure 1 - Figure 4 This utility model provides a technical solution: an environmentally friendly multi-level grain impurity removal device, including a vertical screw conveyor 1, a storage bin 2 at the feed inlet of the vertical screw conveyor 1, and an impurity removal mechanism 3 on the vertical screw conveyor 1 for grain impurity removal. The impurity removal mechanism 3 includes: The separation component 31 includes a box 311 fixed at the lower end of the discharge port of the vertical screw conveyor 1. Several electromagnetic plates 312 are provided at the upper end of the box 311. A bearing seat 313 is fixed at the middle of the lower end of the box 311. A baffle 314 is rotatably installed on the upper end of the bearing seat 313. A servo motor 315 is installed on the outer wall of the box 311 and is used to drive the baffle 314 to flip. A discharge port 316 and a discharge outlet 317 are fixed on the left and right sides of the lower end of the box 311, respectively. Screening component 32 is positioned above separation component 31 and is used for grain screening.

[0016] In this embodiment, the grain in the storage bin 2 is vertically lifted and fed into the box 311 of the separation component 31 by the vertical screw conveyor 1. The grain first passes through several electromagnetic plates 312 located at the upper part of the box 311. The strong magnetic field generated by these plates efficiently adsorbs magnetic metal impurities mixed in the grain, completing the first stage of magnetic separation. At this time, the baffle 314 inside the box 311 is kept tilted to the right under the drive of the servo motor 315, allowing the cleaned grain after magnetic separation to be smoothly guided along the surface of the baffle 314. The material flows downward through the feed inlet 316 and into the upper screening component 32 for subsequent particle size classification. When it is necessary to clean the metal impurities accumulated on the electromagnetic plate 312, the control system instructs the servo motor 315 to drive the baffle 314 to flip to the left, while simultaneously cutting off the power supply to the electromagnetic plate 312 to demagnetize it. This causes the adsorbed metal impurities to fall off onto the surface of the baffle 314 under gravity and finally be discharged through the discharge port 317. This automates the magnetic separation and impurity cleaning process, ensuring that magnetic metal impurities are efficiently and thoroughly separated and collected.

[0017] Specifically, the screening component 32 also includes a base 321 located directly below the discharge port 316. A cylinder 322 is located above the base 321. Several springs 323 are arranged in a circular pattern between the lower outer edge of the cylinder 322 and the upper outer edge of the base 321. An upper screen frame 324 and a lower screen frame 325 are fixed at the upper and lower ends inside the cylinder 322, respectively. A first discharge port 326 is fixed on the outer wall of the cylinder 322 and located between the upper screen frame 324 and the lower screen frame 325. A second discharge port 327 is fixed on the outer wall of the cylinder 322 and located above the upper screen frame 324. A third discharge port 328 is fixed on the outer wall of the cylinder 322 and located below the lower screen frame 325. A vibration motor 329 is installed at the lower end of the cylinder 322.

[0018] In this embodiment, the grain after magnetic separation and impurity removal falls into the screening component 32 directly below the feed port 316. The grain enters the cylinder 322. After the vibration motor 329 is started, it drives the cylinder 322 to generate high-frequency micro-amplitude vibration. This vibration is strengthened and stabilized by the circumferentially arranged springs 323, so that the grain inside the cylinder 322 forms a good dispersion state during the throwing and diffusion motion. The grain first contacts the upper screen frame 324. Large particles of impurities larger than the screen hole size are intercepted on the screen surface and discharged through the second discharge port 327. The remaining grain and small and medium-sized impurities pass through the upper screen frame 324 and fall to the lower screen frame 325. The lower screen frame 325 performs secondary screening of the material. Grain with qualified size is retained as the oversize and collected as clean grain output through the first discharge port 326 located between the upper and lower screen frames. Small impurities smaller than the screen hole size pass through the lower screen frame 325 and become the undersize, and are finally discharged through the third discharge port 328 located below the lower screen frame 325.

[0019] Specifically, the screening component 32 also includes a retaining ring 3210 fixed inside the upper screen frame 324 and the lower screen frame 325, and a number of rubber balls 3211 are placed inside the retaining ring 3210.

[0020] In this embodiment, when the vibration motor 329 drives the cylinder 322 to generate high-frequency vibration, these rubber balls 3211 bounce randomly within the space defined by the retaining ring 3210 and continuously impact the bottom surfaces of the upper screen frame 324 and the lower screen frame 325. This impact can effectively shake off and remove particles stuck in the screen mesh, thereby preventing screen blockage and maintaining the effective screening area and permeability of the screen.

[0021] Specifically, the separation component 31 also includes a discharge pipe 318 fixed at the lower end of the discharge port 317 and used to connect to the collection box.

[0022] In this embodiment, after the metal impurities fall, they are collected and introduced into the discharge pipe 318 through the discharge port 317, and then fall into a dedicated impurity collection box.

[0023] Specifically, inside the housing 311, there are several electromagnetic plates 312 arranged in two rows, and the electromagnetic plates 312 in the two rows are arranged symmetrically and alternately.

[0024] In this embodiment, when the grain falls into the box 311, it is first subjected to the magnetic field of the upper electromagnetic plate 312, which adsorbs most of the magnetic metal impurities. The impurities that are not fully captured will change their falling path due to the staggered arrangement of the lower electromagnetic plates 312 as the grain continues to fall, and will be captured again by the lower magnetic field. This increases the contact range and contact time between the grain and the strong magnetic field area, and improves the adsorption efficiency and removal rate of fine or hidden magnetic metal impurities in the grain flow.

[0025] Specifically, the separation component 31 also includes a valve 319 fixed at the discharge port of the vertical screw conveyor 1 and used to control the start and stop of the feeding.

[0026] In this embodiment, valve 319 remains open during normal impurity removal operation of the equipment; when it is necessary to remove metal impurities adsorbed on electromagnetic plate 312, the control system first closes valve 319 to cut off upstream material supply and prevent new material from interfering with the impurity removal process.

[0027] The working principle and usage process of this utility model are as follows: First, the grain in the storage bin 2 is vertically lifted and fed into the box 311 of the separation component 31 by the vertical screw conveyor 1. At this time, the valve 319 fixed at the discharge port of the vertical screw conveyor 1 remains open. The grain passes through several electromagnetic plates 312 arranged symmetrically in two rows on the upper part of the box 311. The strong magnetic field generated by these plates can efficiently adsorb the magnetic metal impurities mixed in the grain, completing the first stage of magnetic separation and impurity removal. At this time, the baffle 314 inside the box 311 is kept tilted to the right under the drive of the servo motor 315, so that the clean grain after magnetic separation can be smoothly guided to the discharge port 316 along the surface of the baffle 314. Then, the grain falls through the feed inlet 316 into the screening assembly 32 directly below it, entering the cylinder 322. After the vibration motor 329 starts, it drives the cylinder 322 to generate high-frequency, low-amplitude vibrations. This vibration is reinforced and stabilized by the circumferentially arranged springs 323, ensuring good dispersion of the grain inside the cylinder 322 during the throwing and diffusion motion. The grain first contacts the upper screen frame 324, where large particles larger than the screen aperture are trapped on the screen surface and discharged through the second discharge port 327. The remaining grain and small to medium-sized impurities pass through the upper screen frame 324 and fall to the lower screen frame 325. During this screening process, several rubber balls 3211 inside the retaining rings 3210 fixed inside the upper screen frame 324 and the lower screen frame 325 bounce randomly and continuously hit the bottom of the screen, effectively shaking off and removing particles stuck in the screen holes; the lower screen frame 325 performs secondary screening of the material. Grains that meet the size requirements are retained as oversize and collected as clean grains through the first discharge port 326 located between the upper and lower screen frames, while small impurities smaller than the screen hole size pass through the lower screen frame 325 as undersize and are finally discharged through the third discharge port 328 located below the lower screen frame 325. Finally, when it is necessary to clean the metal impurities accumulated on the electromagnetic plate 312, the control system first closes the valve 319 to cut off the upstream material, and then instructs the servo motor 315 to drive the baffle 314 to flip to the left, while cutting off the power supply to the electromagnetic plate 312 to demagnetize it, so that the adsorbed metal impurities fall off to the surface of the baffle 314 under the action of gravity, and are finally concentrated and introduced into the discharge pipe 318 at its lower end through the discharge port 317, and enter the dedicated impurity collection box.

[0028] 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.

[0029] 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. An environmentally friendly multi-level grain cleaning device, comprising a vertical screw conveyor (1), wherein the feed inlet of the vertical screw conveyor (1) is provided with a storage bin (2), characterized in that: The vertical screw conveyor (1) is equipped with a cleaning mechanism (3) for removing impurities from grain. The cleaning mechanism (3) includes: The separation assembly (31) includes a box (311) fixed at the lower end of the discharge port of the vertical screw conveyor (1). Several electromagnetic plates (312) are provided at the upper end of the box (311). A bearing seat (313) is fixed at the middle of the lower end of the box (311). A baffle (314) is rotatably installed at the upper end of the bearing seat (313). A servo motor (315) is installed on the outer wall of the box (311) and is used to drive the baffle (314) to flip. A discharge port (316) and a discharge port (317) are fixed on the left and right sides of the lower end of the box (311), respectively. The screening component (32) is positioned above the separation component (31) and is used for grain screening.

2. The environmentally friendly multi-level grain impurity removal equipment according to claim 1, characterized in that: The screening component (32) also includes a base (321) located directly below the discharge port (316). A cylinder (322) is located above the base (321). Several springs (323) arranged in a circle are installed between the lower outer edge of the cylinder (322) and the upper outer edge of the base (321). An upper screen frame (324) and a lower screen frame (325) are fixed at the upper and lower ends inside the cylinder (322). A first discharge port (326) is fixed on the outer wall of the cylinder (322) and located between the upper screen frame (324) and the lower screen frame (325). A second discharge port (327) is fixed on the outer wall of the cylinder (322) and located above the upper screen frame (324). A third discharge port (328) is fixed on the outer wall of the cylinder (322) and located below the lower screen frame (325). A vibration motor (329) is installed at the lower end of the cylinder (322).

3. The environmentally friendly multi-level grain impurity removal equipment according to claim 2, characterized in that: The screening component (32) also includes a retaining ring (3210) fixed inside the upper screen frame (324) and the lower screen frame (325), and a number of rubber balls (3211) are placed inside the retaining ring (3210).

4. The environmentally friendly multi-level grain impurity removal equipment according to claim 1, characterized in that: The separation component (31) also includes a discharge pipe (318) fixed at the lower end of the discharge port (317) and used to connect to the collection box.

5. The environmentally friendly multi-level grain impurity removal equipment according to claim 1, characterized in that: Inside the box (311), there are several electromagnetic plates (312) arranged in two rows, and the electromagnetic plates (312) in the upper and lower rows are arranged symmetrically and alternately.

6. The environmentally friendly multi-level grain impurity removal equipment according to claim 1, characterized in that: The separation component (31) also includes a valve (319) fixed at the outlet of the vertical screw conveyor (1) and used to control the start and stop of the feeding.

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