Grain dryer with screening structure

Abstract

The grain drying machine with the screening structure comprises a supporting seat, an air heater is fixedly installed on one side of the top end of the supporting seat, a drying bin is fixedly installed on the side, close to the air heater, of the supporting seat, and a screening bin is fixedly installed on the side, close to the drying bin, of the supporting seat. The screening structure has the advantages that when the screening structure needs to be cleaned, equipment does not need to be shut down, the two baffles can be driven to move alternately only by starting the motor, the baffles moving alternately are attached to the partition plate, and therefore grain falling from the top end of the screening bin is distributed; the screw rod is driven to rotate through transmission of the belt and the gear, the cleaning brush is driven by the rotating screw rod to effectively clean the blocked screening plate, the blocked screening plate can be effectively cleaned in the grain conveying process, grain conveying and drying do not need to be stopped, the cleaning efficiency is high, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of grain dryers, in particular to a grain dryer with a screening structure. Background Art

[0002] With the advancement of agricultural modernization, grain production continues to expand. Traditional natural drying methods are no longer able to meet the demand for large-scale, efficient grain drying. To prevent moisture-rich grain from becoming moldy and sprouting during storage, which can reduce its nutritional value and even render it inedible, many companies have developed various types of grain dryers. The advent of grain dryers effectively addresses the challenges of post-harvest grain drying and mold, improving grain drying efficiency and quality. The working principle of a grain dryer is primarily based on the transfer of heat energy and moisture evaporation. During operation, a heating system generates high-temperature hot air, which is delivered to a drying chamber via a conveyor system. Within the drying chamber, the hot air heats and blows through the grain, gradually evaporating the moisture within it and discharging it with the air. The reduced moisture content of the dried grain significantly improves its storage stability. Under appropriate storage conditions, dried grain can maintain its quality and nutritional value for extended periods, minimizing storage losses.

[0003] To facilitate grain storage and processing, existing grain dryers often use screening mechanisms to screen the grain before and after drying. This prevents impurities and debris from clogging the dryer's grain discharge system, hindering the drying process and even damaging the equipment. Screening also removes impurities, stalks, and damaged grains, which increase the grain's surface area and thus prolong drying time. Screening reduces the total volume and surface area of ​​the grain to be dried, thereby shortening drying time, improving drying efficiency, and ensuring a smooth drying process.

[0004] However, the existing grain screening structure is usually composed of a screening bin, a screening plate, a discharge port and a conveying pipe. The grain is fed from the feed port, screened by the screening plate and then transported to the drying bin, and the screened impurities are discharged through the screening plate and the discharge port. However, when the grain is transported and screened, the straw and debris mixed in the grain are easily blocked at the top of the screen mesh hole of the screening structure. Since the screening plate is located inside the screening bin, it is often necessary to manually remove the screening plate and clean it, and then install it in the original way after cleaning. During the cleaning period, the screening bin, heating system and drying bin need to be shut down, and maintenance and cleaning are relatively cumbersome. Therefore, the screening structure greatly affects the grain transportation efficiency during the cleaning process, and is relatively inconvenient to use. Utility Model Content

[0005] The purpose of the present utility model is to provide a grain dryer with a screening structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a grain dryer with a screening structure, comprising a support base, a hot air blower fixedly installed on one side of the top of the support base, a drying bin fixedly installed on the side of the support base close to the hot air blower, a screening bin fixedly installed on the side of the support base close to the drying bin, the screening bin is rotatably connected to a symmetrically arranged circular shaft near the top position, a baffle is fixedly connected to each of the circular shafts, one end of each of the circular shafts is fixedly connected to a first gear, a limiting groove is provided near the bottom end of the screening bin near the first gear, a slider is slidably connected in the limiting groove, and one side of the slider The cam is fixedly connected to the gear train of the screening bin, and a motor is installed corresponding to the rack of the screening bin. The output end of the motor is fixedly connected to the second gear, and the end of the circular shaft away from the first gear is fixedly connected to the first pulley. The bottom end of the screening bin is fixedly connected to the symmetrically arranged screening plate, and the screening bin is fixedly connected to the middle position of the screening plate corresponding to the screening bin. The screening bin is provided with a symmetrically arranged chute, and the chute is rotatably connected to a screw rod, one end of the screw rod is fixedly connected to the second pulley, and the screw rod is threadedly connected to a threaded block, and the opposite sides of the two threaded blocks are fixedly connected to a cleaning brush.

[0007] Preferably, a ventilation duct is fixedly connected between the hot air blower and the drying bin, a conveying duct is fixedly connected between the drying bin and the screening bin, and the first pulley and the second pulley are connected by a belt.

[0008] Preferably, the bottom end of the drying bin is designed as an inclined structure, and the screening bin is provided with a discharge port corresponding to the screening plate.

[0009] Preferably, the first pulley and the second pulley are both cam pulleys, and the belt is a synchronous belt.

[0010] Preferably, the second gear is meshedly connected to a rack, and the rack is meshedly connected to the two first gears.

[0011] Preferably, the top of the partition plate is designed as a triangular structure, and both sides of the top of the triangle are designed as arc structures.

[0012] Preferably, one end of the baffle close to the partition plate is designed as an arc-shaped structure, and the arc track corresponds to the arc track of the partition plate, and the top end of the partition plate is arranged corresponding to the baffle.

[0013] Preferably, a feed port is fixedly connected to the top of the screening bin, the feed port is designed as an inverted cone structure, and the feed port is arranged corresponding to the baffle.

[0014] Preferably, the screening holes of the screening plate are designed as a strip structure, and the gap between the screening holes is larger than the material size.

[0015] Preferably, the cleaning brush is arranged corresponding to the screening plate, and the cleaning brush and the screening plate are in contact with each other.

[0016] Compared with the prior art, the beneficial effect of the utility model is that when the screening structure needs to be cleaned, there is no need to shut down the equipment. It is only necessary to start the motor to drive the two baffles to move alternately. The alternatingly moving baffles are fitted with the partitions to achieve the diversion of the falling grain from the top of the screening bin. At the same time, when the baffles move alternately, the belt and gear transmission drive the screw rod to rotate, and the rotating screw rod drives the cleaning brush to effectively clean the clogged screening plate, so that the clogged screening plate can be effectively cleaned during the transportation of grain, without stopping the transportation and drying of the grain. The cleaning efficiency is high and it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 This is the front view of the screening bin structure of the utility model;

[0019] Figure 3 For the utility model Figure 2 A magnified view of the structure of area A;

[0020] Figure 4 This is a side view of the screening bin structure of the present utility model;

[0021] Figure 5 This is a cross-sectional view of the main structure of the screening bin of the present invention;

[0022] Figure 6 This is a cross-sectional view of the bottom structure of the screening bin of the present invention.

[0023] In the figure: 1. Support base; 2. Hot air blower; 3. Drying chamber; 4. Screening chamber; 5. Circular shaft; 6. Baffle; 7. First gear; 8. Limiting groove; 9. Slider; 10. Rack; 11. Motor; 12. Second gear; 13. First pulley; 14. Screening plate; 15. Partition plate; 16. Slide; 17. Screw; 18. Second pulley; 19. Threaded block; 20. Cleaning brush. DETAILED DESCRIPTION

[0024] See also Figure 1-6The utility model provides a technical solution: a grain dryer with a screening structure, including a support base 1, a hot air blower 2 is fixedly installed on one side of the top of the support base 1, a drying bin 3 is fixedly installed on the side of the support base 1 near the hot air blower 2, a screening bin 4 is fixedly installed on the side of the support base 1 near the drying bin 3, the screening bin 4 is rotatably connected to a symmetrically arranged circular shaft 5 near the top position, baffles 6 are fixedly connected to the circular shafts 5, one end of the circular shafts 5 is fixedly connected to a first gear 7, a limiting groove 8 is provided at the bottom end of the screening bin 4 near the first gear 7, a slider 9 is slidably connected in the limiting groove 8, and a rack 10 is fixedly connected to one side of the slider 9. A motor 11 is installed corresponding to the rack 10, and the output end of the motor 11 is fixedly connected to the second gear 12. The end of the circular shaft 5 away from the first gear 7 is fixedly connected to the first pulley 13, and the bottom end of the screening bin 4 is fixedly connected to a symmetrically arranged screening plate 14. The screening bin 4 is fixedly connected to a partition plate 15 at the middle position of the screening plate 14 corresponding to the screening plate 14. The screening bin 4 is provided with a symmetrically arranged chute 16 corresponding to the screening plate 14, and a screw rod 17 is rotatably connected in the chute 16. One end of the screw rod 17 is fixedly connected to the second pulley 18, and a threaded block 19 is threadedly connected to the screw rod 17. A cleaning brush 20 is fixedly connected to the opposite side of the two threaded blocks 19.

[0025] A ventilation duct is fixedly connected between the hot air blower 2 and the drying bin 3, and a conveying pipe is fixedly connected between the drying bin 3 and the screening bin 4, so that the hot air blower 2 can convey the hot air to the inside of the screening bin 4 through the conveying pipe, so as to heat and dry the grain inside the screening bin 4. The first pulley 13 and the second pulley 18 are connected by a belt. The first pulley 13 and the second pulley 18 are both cam pulleys, and the belt is a synchronous belt, so that the first pulley 13 can synchronously drive the second pulley 18. The bottom end of the drying bin 3 is designed with an inclined structure, and the screening bin 4 is provided with a discharge port corresponding to the screening plate 14, so that the grain after screening at the top of the screening bin 4 is conveyed into the conveying pipe, and then conveyed to the drying bin 3 through the conveying pipe. The second gear 12 is meshed with the rack 10, and the rack 10 is meshed with the two first gears 7, so that the second gear 12 drives the rack 10 The reciprocating motion drives the two first gears 7 to rotate synchronously through the rack 10. The top of the partition plate 15 is designed as a triangular structure, and the two sides of the top of the triangle are designed as arc structures. The end of the baffle 6 close to the partition plate 15 is designed as an arc structure, and the arc trajectory corresponds to the arc trajectory of the partition plate 15. The top of the partition plate 15 is correspondingly arranged with the baffle 6. The design of the arc structure facilitates the fit between the partition plate 15 and the baffle 6, so that the two baffles 6 can effectively block the grain when performing alternating motion. The screening hole of the screening plate 14 is designed as a strip structure. The gap between the screening holes is larger than the material size, which is convenient for screening straw and debris. At the same time, it can ensure that the grain passes through the screening plate 14. The cleaning brush 20 is corresponding to the screening plate 14. The cleaning brush 20 and the screening plate 14 are fit to each other, and fit to each other, which facilitates the cleaning brush 20 to clean the debris on the top of the screening plate 14.

[0026] Specifically, when the present invention is used, when the equipment needs to transport grain and the sieve holes of the screening plate 14 are clogged with debris and the screening plate 14 needs to be cleaned, the motor 11 is started, and the output end of the motor 11 drives the second gear 12 to rotate. Since the second gear 12 is meshed with the rack 10, the second gear 12 transmits the power to the rack 10. Since the slider 9 fixedly connected to one side of the rack 10 is slidably connected to the limiting groove 8, the limited rack 10 is driven by the second gear 12 to reciprocate along the limiting groove 8. The reciprocating rack 10 squeezes the two first gears 7 at the same time, and the squeezed first gears 7 are squeezed. The gears 7 rotate at the same time, and the two first gears 7 drive the circular shafts 5 to rotate on the screening bin 4. The two rotating circular shafts 5 drive the two baffles 6 to rotate. The two rotating baffles 6 are alternately fitted with the partition plates 15. The grain falling from the top of the screening bin 4 is blocked by the baffles 6 and slides to the top of the other screening plate 14. At the same time, the rotating circular shaft 5 drives the first pulley 13 to rotate, and the first pulley 13 drives the second pulley 18 to rotate through the belt. The second pulley 18 drives the screw rod 17 to rotate, and the screw rod 17 drives the threaded block 19 to move horizontally in the chute 16. The moving threaded block 19 drives the cleaning brush 20 to clean and discharge the debris on the surface of the screening plate 14.

Claims

1. A grain dryer with a screening structure, characterized in that: The invention comprises a support base (1), wherein a hot air blower (2) is fixedly installed on one side of the top of the support base (1), a drying chamber (3) is fixedly installed on one side of the support base (1) close to the hot air blower (2), a screening chamber (4) is fixedly installed on one side of the support base (1) close to the drying chamber (3), the screening chamber (4) is rotatably connected to a symmetrically arranged circular shaft (5) near the top position, a baffle (6) is fixedly connected to each of the circular shafts (5), one end of each of the circular shafts (5) is fixedly connected to a first gear (7), a limiting groove (8) is provided near the bottom end of the screening chamber (4) close to the first gear (7), a slider (9) is slidably connected in the limiting groove (8), a rack (10) is fixedly connected to one side of the slider (9), and a motor (10) is installed in the screening chamber (4) corresponding to the rack (10). 11), the output end of the motor (11) is fixedly connected to the second gear (12), the end of the circular shaft (5) away from the first gear (7) is fixedly connected to the first pulley (13), the bottom end of the screening bin (4) is fixedly connected to the symmetrically arranged screening plate (14), the screening bin (4) is fixedly connected to the middle position of the screening plate (14), the screening bin (4) is provided with a symmetrically arranged chute (16) corresponding to the screening plate (14), the chute (16) is rotatably connected to a screw rod (17), one end of the screw rod (17) is fixedly connected to the second pulley (18), the screw rod (17) is threadedly connected to a threaded block (19), and the opposite sides of the two threaded blocks (19) are fixedly connected to a cleaning brush (20).

2. The grain dryer with a screening structure according to claim 1, characterized in that: A ventilation duct is fixedly connected between the hot air blower (2) and the drying chamber (3), a conveying duct is fixedly connected between the drying chamber (3) and the screening chamber (4), and the first pulley (13) and the second pulley (18) are connected via a belt.

3. The grain dryer with a screening structure according to claim 1, characterized in that: The bottom end of the drying bin (3) is designed as an inclined structure, and the screening bin (4) is provided with a discharge port corresponding to the screening plate (14).

4. The grain dryer with a screening structure according to claim 1, characterized in that: The first pulley (13) and the second pulley (18) are both cam pulleys, and the belt is a synchronous belt.

5. The grain dryer with a screening structure according to claim 1, characterized in that: The second gear (12) is meshedly connected to the rack (10), and the rack (10) is meshedly connected to the two first gears (7).

6. The grain dryer with a screening structure according to claim 1, characterized in that: The top of the partition plate (15) is designed as a triangular structure, and both sides of the top of the triangle are designed as arc structures.

7. The grain dryer with a screening structure according to claim 5, characterized in that: One end of the baffle (6) close to the partition plate (15) is designed as an arc-shaped structure, and the arc track corresponds to the arc track of the partition plate (15), and the top end of the partition plate (15) is arranged corresponding to the baffle (6).

8. The grain dryer with a screening structure according to claim 1, characterized in that: The top of the screening bin (4) is fixedly connected with a feed port, the feed port is designed as an inverted cone structure, and the feed port is arranged corresponding to the baffle (6).

9. The grain dryer with a screening structure according to claim 1, characterized in that: The screening holes of the screening plate (14) are designed as a strip structure, and the gap between the screening holes is larger than the size of the material.

10. The grain dryer with a screening structure according to claim 1, characterized in that: The cleaning brush (20) is arranged corresponding to the screening plate (14), and the cleaning brush (20) and the screening plate (14) are in contact with each other.

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