A grain dryer with high drying efficiency

Abstract

This utility model belongs to the field of agricultural machinery technology and discloses a grain dryer with high drying efficiency. It includes a drying chamber with a hollow tube installed on the top. The upper end of the hollow tube extends to the upper side of the drying chamber, and a gap is left between the lower end of the hollow tube and the bottom wall of the drying chamber for grain to enter. A discharge port is provided on the outer surface of the hollow tube near its upper part. A lifting mechanism is provided inside the hollow tube to lift the grain to the top. A sleeve is installed on the outer surface of the hollow tube, and air vents are evenly distributed on the surface of the sleeve. A hot air blower is installed at the bottom of the drying chamber, and an air outlet pipe is connected to the outlet end of the hot air blower, which communicates with the interior of the sleeve. Multiple inner annular plates are arranged vertically on the outer surface of the sleeve. By repeatedly lifting the grain, it can be continuously and evenly dried until its moisture content reaches the standard before being discharged, thus ensuring the dryness of the grain and preventing mold growth during subsequent storage.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology, specifically a grain dryer with high drying efficiency. Background Technology

[0002] Newly harvested grains often contain high moisture content. If they are not dried in time, they are prone to mold, sprouting, pests, and other problems, leading to a decline in grain quality and yield loss, which seriously affects farmers' economic income and the country's grain reserve security. Currently, grains are generally placed in the sun to dry, but this cannot be done in rainy, foggy, or hazy weather. In such cases, a dryer can be used to dry the grain.

[0003] Chinese patent CN214747073U discloses a high-efficiency grain dryer. The high-efficiency grain dryer uses a first motor to drive a rotating rod to rotate. The rotating rod and a rotary plate move the grain from the storage box through the feeding box into the drying box. A control device controls the heating mesh plate to raise the temperature inside the drying box. A temperature sensor monitors the temperature inside the drying box in real time. A slide plate moves the grain through the drying box. The dried grain is collected by a receiving box.

[0004] Although the aforementioned patent can dry grains, the grains flow on the slide plate inside the drying chamber and are discharged directly from the outlet. The residence time of the grains inside the drying chamber is uncontrollable, and they are easily discharged before the drying requirements are met, resulting in poor overall drying effect and easy mold growth during subsequent storage. Utility Model Content

[0005] To address the problems mentioned in the background section, this utility model provides a grain dryer with high drying efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A grain dryer with high drying efficiency includes a drying chamber. A hollow tube is installed on the top of the drying chamber, with its upper end extending to the upper side of the drying chamber. A gap is left between the lower end of the hollow tube and the bottom wall of the drying chamber for grain to enter. A discharge port is provided on the outer surface of the hollow tube near its upper part. A lifting mechanism capable of lifting the grain to the top is provided inside the hollow tube. A sleeve is installed on the outer surface of the hollow tube, and air vents are evenly distributed on the surface of the sleeve. A hot air blower is provided at the bottom of the drying chamber, and an air outlet pipe is connected to the air outlet end of the hot air blower. The end of the air outlet pipe communicates with the interior of the sleeve. Multiple inner annular plates are arranged vertically on the outer surface of the sleeve, and multiple outer annular plates are arranged vertically on the inner wall of the drying chamber, with the outer annular plates and inner annular plates distributed alternately.

[0007] Preferably, the lifting mechanism includes a shaft rotatably mounted on the bottom wall of the drying chamber, and the shaft is coaxially arranged inside the hollow tube. The outer surface of the shaft is provided with helical blades, the outer edge of the helical blades is in contact with the inner wall of the hollow tube, and a motor is installed at the top of the hollow tube, with the output shaft of the motor connected to the shaft.

[0008] Preferably, the top of the drying box is provided with a feed inlet, and the outer surface of the hollow tube located on the upper side of the drying box is connected to a discharge pipe. The outer surface of the hollow tube is equipped with an annular baffle through a lifting mechanism.

[0009] Preferably, the lifting mechanism includes a collar slidably mounted on the outer surface of the hollow tube, a plurality of guide rods connected to the lower surface of the collar, the ends of the guide rods sliding through to the inside of the drying chamber and connected to an annular baffle, and an electric push rod mounted on the outer surface of the hollow tube, the end of the telescopic end of the electric push rod being connected to the collar.

[0010] Preferably, the end of the air outlet duct is connected to a cross tube, and each of the four corners of the cross tube is connected to a diversion tube, and the ends of the four diversion tubes are all connected to the inside of the sleeve.

[0011] Preferably, the drying oven has four support legs installed at the four corners of the bottom, and a bracket is installed between the four support legs, with the hot air blower mounted on the bracket.

[0012] Preferably, the inner wall of the drying oven is provided with three humidity sensors, and the three humidity sensors are distributed at equal intervals along the height direction.

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

[0014] 1. This utility model uses a lifting mechanism to lift the grain located at the bottom to the discharge port. Then, it is guided by the inner and outer annular plates in sequence, which disperses the grain and increases the falling time. This allows the grain to be dried by hot air evenly and for a longer period of time during the falling process. Furthermore, by repeatedly lifting the grain, the grain can be dried continuously and evenly until its moisture content reaches the standard before being discharged. This ensures the dryness of the grain and avoids mold growth during subsequent storage.

[0015] 2. This utility model uses a lifting mechanism to raise the annular baffle, exposing the discharge port. When the motor is started, the grain is lifted to the discharge port and discharged outwards, achieving the function of reciprocating lifting and drying of the grain. When the lifting mechanism lowers the annular baffle to block the discharge port, the lifted grain can be discharged outwards from the discharge pipe. Therefore, the functions of discharge and lifting drying can be achieved through the same set of mechanisms, eliminating the need for two separate sets of mechanisms and reducing costs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a frontal cross-sectional view of the present invention.

[0018] Figure 3 for Figure 1 Enlarged diagram of A in the middle;

[0019] Figure 4 for Figure 2 Enlarged diagram of B in the diagram;

[0020] Figure 5 for Figure 2 An enlarged diagram of C in the diagram.

[0021] In the diagram: 1. Drying oven; 101. Hollow tube; 102. Discharge port; 103. Sleeve; 104. Hot air blower; 105. Air outlet pipe; 106. Inner annular plate; 107. Outer annular plate; 2. Lifting mechanism; 201. Shaft; 202. Spiral blade; 203. Motor; 3. Feed inlet; 301. Discharge pipe; 302. Annular baffle; 4. Lifting mechanism; 401. Collar; 402. Guide rod; 403. Electric push rod; 5. Cross tube; 501. Diverter pipe; 6. Support leg; 601. Bracket; 7. Humidity sensor. Detailed Implementation

[0022] 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.

[0023] like Figures 1 to 5 As shown, this utility model provides a grain dryer with high drying efficiency, including a drying chamber 1. A hollow tube 101 is installed on the top of the drying chamber 1, with its upper end extending to the upper side of the drying chamber 1. A gap is left between the lower end of the hollow tube 101 and the bottom wall of the drying chamber 1 for grain to enter. A discharge port 102 is provided on the outer surface of the hollow tube 101 near its upper part. A lifting mechanism 2 capable of lifting the grain to the top is provided inside the hollow tube 101. A sleeve 103 is installed on the outer surface of the hollow tube 101, and air vents are evenly distributed on the surface of the sleeve 103. A hot air blower 104 is provided at the bottom of the drying chamber 1, and an air outlet pipe 105 is connected to the air outlet end of the hot air blower 104. The end of the air outlet pipe 105 communicates with the inside of the sleeve 103. The outer surface of the sleeve 103 is provided with a plurality of inner annular plates 106 in the vertical direction, and the inner wall of the drying oven 1 is provided with a plurality of outer annular plates 107 in the vertical direction, and the outer annular plates 107 and the inner annular plates 106 are distributed alternately.

[0024] The grain to be dried is loaded into the drying chamber 1, and then the hot air blower 104 is turned on. The hot air generated by the blower enters the sleeve 103 through the air outlet 105, and finally blows evenly onto the grain through the air outlet on its surface. At the same time, the lifting mechanism 2 lifts the grain located at the bottom to the discharge port 102 for discharge. Then, it is guided by the inner ring plate 106 and the outer ring plate 107 in sequence, which disperses it and increases the falling time. This allows the grain to be dried by hot air evenly and for a longer time during the falling process. Furthermore, by repeatedly lifting the grain, the grain can be dried continuously and evenly until its moisture content reaches the standard before being discharged. This ensures the dryness of the grain and avoids mold growth during subsequent storage.

[0025] It is worth noting that the hot air blower 104 is model HWIR450F, which features an advanced intelligent temperature control system that can adjust the appropriate drying temperature according to the type of grain.

[0026] The diameter of the vent can be set according to the actual situation to ensure that the grain will not cause blockage of the vent.

[0027] like Figure 2 , Figure 4 and Figure 5 As shown, the lifting mechanism 2 includes a shaft 201 rotatably mounted on the bottom wall of the drying chamber 1, and the shaft 201 is coaxially arranged inside the hollow tube 101. The outer surface of the shaft 201 is provided with a spiral blade 202, the outer edge of the spiral blade 202 is in contact with the inner wall of the hollow tube 101, and a motor 203 is mounted on the top of the hollow tube 101. The output shaft of the motor 203 is connected to the shaft 201.

[0028] Using the above scheme: when the motor 203 is started, its drive shaft 201 rotates, and the shaft 201 drives the spiral blades 202 to rotate, so that the grain that has entered between the bottom of the hollow tube 101 and the bottom wall of the drying box 1 can be lifted upward by the rotating spiral blades 202.

[0029] like Figures 1 to 4 As shown, the top of the drying chamber 1 is provided with a feed inlet 3. A discharge pipe 301 is connected to the outer surface of the hollow tube 101 located on the upper side of the drying chamber 1. An annular baffle 302 is installed on the outer surface of the hollow tube 101 through a lifting mechanism 4. The lifting mechanism 4 includes a collar 401 slidably installed on the outer surface of the hollow tube 101. A plurality of guide rods 402 are connected to the lower surface of the collar 401. The ends of the guide rods 402 slide through to the inner side of the drying chamber 1 and are connected to the annular baffle 302. An electric push rod 403 is installed on the outer surface of the hollow tube 101. The end of the telescopic end of the electric push rod 403 is connected to the collar 401.

[0030] Using the above scheme: Grain can be added into the drying chamber 1 through the inlet 3 for drying. After the grain is dried, it can be discharged outward through the discharge pipe 301. The electric push rod 403 drives the collar 401 to rise, and the collar 401 drives the annular baffle 302 to rise through the guide rod 402, exposing the discharge port 102. When the motor 203 is started, the grain is lifted to the discharge port 102 and discharged outward, realizing the function of reciprocating lifting and drying of the grain. When the electric push rod 403 drives the annular baffle 302 to fall and block the discharge port 102, the lifted grain can be discharged outward through the discharge pipe 301. Therefore, the functions of discharge and lifting drying can be realized through the same set of mechanisms, eliminating the need for two separate sets of mechanisms and reducing costs.

[0031] like Figure 1 , Figure 2 and Figure 5 As shown, the end of the air outlet duct 105 is connected to a cross tube 5, and each of the four corners of the cross tube 5 is connected to a diversion tube 501, and the ends of the four diversion tubes 501 are all connected to the inside of the sleeve 103. Each of the four corners of the bottom of the drying oven 1 is equipped with a support leg 6, and a bracket 601 is installed between the four support legs 6. The hot air blower 104 is installed on the bracket 601.

[0032] The above scheme is adopted: through the diversion effect of the cross tube 5 and the diverter tube 501, the hot air enters the sleeve 103 evenly and is discharged out evenly from the air outlet, reducing the local concentration of hot air and improving the uniformity of grain drying.

[0033] like Figures 1 to 4 As shown, the inner wall of the drying oven 1 is equipped with three humidity sensors 7, and the three humidity sensors 7 are distributed at equal intervals along the height direction.

[0034] The above scheme uses three humidity sensors 7 to monitor the moisture content of grain at different heights, thereby accurately determining the overall dryness and ensuring that the moisture content of the dried material is uniform, achieving the ideal drying effect.

[0035] Working principle and usage process of this utility model:

[0036] The grain is loaded into the drying chamber 1 through the feed inlet 3 using an external lifting device. Then, the hot air blower 104 is started, and the hot air generated enters the sleeve 103 through the air outlet 105. Finally, it is blown evenly onto the grain through the air outlet holes on its surface. At the same time, the motor 203 is started to drive the shaft 201 to rotate. The shaft 201 drives the spiral blades 202 to rotate, so that the grain that has entered between the bottom of the hollow tube 101 and the bottom wall of the drying chamber 1 can be lifted upward by the rotating spiral blades 202 to the discharge port 102 for discharge. Then, it is guided by the inner annular plate 106 and the outer annular plate 107 in sequence, so that it is dispersed and the falling time is increased. This allows the grain to be dried by hot air evenly and for a longer time during the falling process. By repeatedly lifting the grain, the grain can be dried continuously and evenly. After drying is completed, the electric push rod 403 is started to drive the annular baffle 302 to descend and block the discharge port 102. The lifted grain can be discharged outward from the discharge pipe 301.

[0037] 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.

[0038] 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 grain dryer with high drying efficiency, comprising a drying chamber (1), characterized in that: A hollow tube (101) is installed on the top of the drying box (1). The upper end of the hollow tube (101) extends to the upper side of the drying box (1). A gap is left between the lower end of the hollow tube (101) and the bottom wall of the drying box (1) for grain to enter. A discharge port (102) is provided on the outer surface of the hollow tube (101) near its upper side. A lifting mechanism (2) capable of lifting the grain to the top is provided inside the hollow tube (101). The outer surface of the hollow tube (101) is fitted with a sleeve (103), and the surface of the sleeve (103) is evenly distributed with air outlet holes. A hot air blower (104) is provided at the bottom of the drying box (1), and the air outlet end of the hot air blower (104) is connected to an air outlet pipe (105). The end of the air outlet pipe (105) is connected to the inside of the sleeve (103). The outer surface of the sleeve (103) is provided with a plurality of inner annular plates (106) in the vertical direction, and the inner wall of the drying box (1) is provided with a plurality of outer annular plates (107) in the vertical direction, and the outer annular plates (107) and the inner annular plates (106) are distributed alternately.

2. The high-efficiency grain dryer according to claim 1, characterized in that: The lifting mechanism (2) includes a shaft (201) rotatably mounted on the bottom wall of the drying box (1), and the shaft (201) is coaxially arranged inside the hollow tube (101). The outer surface of the shaft (201) is provided with a spiral blade (202), the outer edge of the spiral blade (202) is in contact with the inner wall of the hollow tube (101), and a motor (203) is mounted on the top of the hollow tube (101). The output shaft of the motor (203) is connected to the shaft (201).

3. The high-efficiency grain dryer according to claim 1, characterized in that: The top of the drying box (1) is provided with a feed inlet (3), and the outer surface of the hollow tube (101) located on the upper side of the drying box (1) is connected to a discharge pipe (301). The outer surface of the hollow tube (101) is equipped with an annular baffle (302) through a lifting mechanism (4).

4. The high-efficiency grain dryer according to claim 3, characterized in that: The lifting mechanism (4) includes a collar (401) slidably mounted on the outer surface of the hollow tube (101). A plurality of guide rods (402) are connected to the lower surface of the collar (401). The ends of the guide rods (402) slide through to the inner side of the drying box (1) and are connected to the annular baffle (302). An electric push rod (403) is mounted on the outer surface of the hollow tube (101). The end of the telescopic end of the electric push rod (403) is connected to the collar (401).

5. The high-efficiency grain dryer according to claim 1, characterized in that: The end of the air outlet pipe (105) is connected to a cross pipe (5), and each of the four corners of the cross pipe (5) is connected to a diversion pipe (501), and the ends of the four diversion pipes (501) are all connected to the inside of the sleeve (103).

6. The high-efficiency grain dryer according to claim 1, characterized in that: The drying box (1) has four support legs (6) installed at the four corners of the bottom, and a bracket (601) is installed between the four support legs (6). The hot air blower (104) is installed on the bracket (601).

7. The high-efficiency grain dryer according to claim 1, characterized in that: The inner wall of the drying oven (1) is provided with three humidity sensors (7), and the three humidity sensors (7) are distributed at equal intervals along the height direction.

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