A drying device for grain processing

Abstract

The present invention relates to the technical field of drying, and specifically provides a drying device for grain processing, including a drying cylinder. A rotating cylinder is sleeved on the outer periphery of the drying cylinder, and there is a cavity between the rotating cylinder and the drying cylinder. Drying trays are arranged up and down in the drying cylinder. First ventilation holes are opened on the side walls of the drying trays, and second ventilation holes are opened on the side wall of the drying cylinder, and they correspond to each other one by one. Obstructing blocks with gradually increasing lengths from top to bottom are arranged on the inner wall of the rotating cylinder. When the rotating cylinder rotates, the number of obstructing blocks blocking the second ventilation holes can be adjusted, so as to adjust the length of the slow-suction area, so that the length of the slow-suction area can be adaptively adjusted according to the humidity of the grain, so that the slow-suction effect of the grain is better, and the moisture content of the grain is evenly distributed, so as to avoid quality problems such as mildew and germination during subsequent storage and processing, and improve the drying quality of the grain.

Description

Technical Field

[0001] The present invention relates to the technical field of drying, and particularly to a drying device for grain processing. Background Art

[0002] Drying equipment is widely used in fields such as agriculture, food processing, chemical industry, and medicine to reduce the moisture content of materials for storage, transportation, and further processing. For example, it is applied in the field of drying grains, specifically to reduce the water content for storage and further processing. Correct use of grain drying equipment can prevent grains from mildewing, deteriorating, and losing nutrients. Chinese Patent CN213090395U discloses an inner core structure of a grain drying equipment. In this solution, the dryer is divided into a tempering and material leveling section, a drying section, and a discharging section from top to bottom. The tempering and material leveling section has the same height as the drying section, and a barrier drying device is installed in the tempering and material leveling section to complete the drying operation of the grains.

[0003] However, when drying grains with different humidities in the above solution, grains with relatively high or low humidity may enter the tempering and material leveling section with a humidity higher or lower than the required humidity for tempering, resulting in a poor tempering effect of the grains in the tempering and material leveling section, thus affecting the quality of the finished product. Summary of the Invention

[0004] Based on this, in view of the problem that the humidity of grains with different humidities entering the tempering section is different, which affects the drying quality of grains in the tempering section, it is necessary to provide a drying device for grain processing.

[0005] The above object is achieved by the following technical solutions:

[0006] A drying device for grain processing, comprising:

[0007] A drying cylinder, on which a feed inlet, an air inlet, and an air outlet are provided;

[0008] A rotating cylinder, which is sleeved on the outer periphery of the drying cylinder and can rotate. There is a cavity between the rotating cylinder and the drying cylinder, and the cavity is communicated with the air inlet;

[0009] Drying trays, which are horizontally arranged in the drying cylinder. First ventilation holes are provided on the side walls of the drying trays, and second ventilation holes are provided on the side walls of the drying cylinder. The first ventilation holes and the second ventilation holes correspond to each other one by one. The cavity is communicated with the first ventilation holes and the second ventilation holes. There are several drying trays distributed up and down, and communication grooves are provided on the drying trays. Grains fall layer by layer through the communication grooves;

[0010] A scraping assembly, which is located on the drying trays and is used to convey grains into the communication grooves;

[0011] On the inner wall of the rotating cylinder, there are shielding blocks distributed vertically. The shielding blocks are used to shield the second ventilation holes. The length of the shielding blocks gradually increases from top to bottom. When the rotating cylinder rotates, it drives the shielding blocks to gradually block the second ventilation holes from bottom to top, and when rotating in the reverse direction, it gradually opens the blocked second ventilation holes from top to bottom.

[0012] Furthermore, the connecting groove is an annular groove. A limiting ring is arranged below the connecting groove. There is a space between the connecting groove and the limiting ring. The grains pass through the space between the limiting ring and the connecting groove. The limiting ring can move vertically to change the size of the space between the limiting ring and the connecting groove so as to change the flow rate of the grains.

[0013] The limiting ring is configured to move upward to reduce the space between the limiting ring and the connecting groove when the shielding block shields the second ventilation hole, and increase the space between the limiting ring and the connecting groove when the shielding block opens the blocked second ventilation hole.

[0014] Furthermore, a baffle is arranged on the outer periphery of the limiting ring. The baffle passes through the first ventilation hole and the second ventilation hole. One end of the shielding block on the rotating cylinder has an inclined surface. When the rotating cylinder rotates, it drives the baffle to move vertically on the inclined surface of the shielding block.

[0015] Furthermore, the scraping assembly includes a scraping disc and scraping rods. The scraping disc is rotatably arranged at the center of the drying disc. The scraping rods are fixedly arranged on the outer peripheral surface of the scraping disc, and there are several scraping rods. The shape of the scraping rods is serrated, and the cross-section of the scraping rods is triangular with the tip facing upward. When the scraping disc rotates, the scraping rods scrape the grains, and the scraping rods gather the grains into the connecting groove.

[0016] Furthermore, a dispersing disc is arranged below the drying disc. Dispersing rods are arranged on the outer periphery of the dispersing disc. The shape of the dispersing rods is serrated, and the cross-section of the dispersing rods is triangular with the tip facing upward. After passing through the connecting groove, the grains pass through the tips of the dispersing rods to be dispersed.

[0017] Furthermore, the dispersing rods and the scraping rods are arranged in an alternating manner.

[0018] Furthermore, a driving assembly is arranged on the drying cylinder. The driving assembly is used to drive the scraping disc and the dispersing disc to rotate.

[0019] Furthermore, the driving assembly includes a driving motor and a transmission shaft. The driving motor is fixedly arranged on the drying cylinder. The transmission shaft is fixedly connected to the rotating shaft of the driving motor. The scraping disc and the dispersing disc are both coaxially connected to the transmission shaft.

[0020] Further, a first spline is provided at the upper end of the rotating shaft of the scraping disc, and the first spline is connected to the transmission shaft. A keyway is provided at the lower end of the rotating shaft of the scraping disc. A second spline is provided at the upper end of the rotating shaft of the dispersing disc, and the second spline is located within the keyway, and the keyway and the first spline are arranged staggeredly.

[0021] Further, a support frame is provided below the drying cylinder, and the support frame is used to support the drying cylinder.

[0022] The beneficial effects of the present invention are as follows:

[0023] By providing a rotating cylinder structure, the present invention adjusts the length of the slow-settling area, enabling the length of the slow-settling area to be adaptively adjusted according to the humidity of the grains. As a result, the slow-settling effect of the grains is better, and the moisture content of the grains is evenly distributed, avoiding quality problems such as mildew and germination during subsequent storage and processing, and improving the drying quality of the grains.

[0024] By providing scraping rods that are serrated, have a triangular cross-section, and a pointed end facing upward, the scraping rods cause less damage to the grains when scraping the grains, reduce the force between the grains, and lower the probability of the grains being crushed.

[0025] By providing dispersing rods that are serrated, have a triangular cross-section, and a pointed end facing upward, the grains are evenly dispersed after passing through the dispersing rods, enabling the grains to be evenly heated and achieving a better drying effect for the grains. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of a drying device for grain processing provided by an embodiment of the present invention;

[0027] Figure 2 It is a schematic internal structure diagram of a drying device for grain processing provided by an embodiment of the present invention;

[0028] Figure 3 It is an exploded view of the drying disc of a drying device for grain processing provided by an embodiment of the present invention;

[0029] Figure 4 It is a schematic structural diagram of the rotating cylinder of a drying device for grain processing provided by an embodiment of the present invention;

[0030] Figure 5 It is a schematic structural diagram of the scraping assembly of a drying device for grain processing provided by an embodiment of the present invention;

[0031] Figure 6 It is a sectional view of the drying cylinder of a drying device for grain processing provided by an embodiment of the present invention.

[0032] Wherein:

[0033] 100, drying cylinder; 110, feed inlet; 120, discharge outlet; 130, air inlet; 140, air outlet; 150, support frame; 160, limit ring;

[0034] 200, rotating cylinder; 210, blocking block; 220, communication hole;

[0035] 300, drying tray; 310, first ventilation hole; 320, second ventilation hole; 330, communication groove;

[0036] 400, limiting ring; 410, baffle; 420, elastic piece;

[0037] 500, scraping tray; 510, scraping rod; 520, first spline; 530, keyway;

[0038] 600, dispersion tray; 610, dispersion rod; 620, second spline;

[0039] 700, drive assembly; 710, drive motor; 720, transmission shaft. Specific Embodiments

[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The terms "connection" and "coupling" used in this application, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0042] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0043] The following will refer to Figures 1-6 to describe a drying device for grain processing provided by the present application.

[0044] A drying device for grain processing, suitable for drying grains, includes a drying cylinder 100. An inlet 110, an air inlet 130 and an air outlet 140 are provided on the upper end surface of the drying cylinder 100. Grains enter the drying cylinder 100 from the inlet 110, and the heated gas enters the drying cylinder 100 from the air inlet 130 to dry the grains. Subsequently, it is discharged through the air outlet 140 to form a gas flow to uniformly heat the grains. An outlet 120 is provided at the bottom of the drying cylinder 100, and the dried grains are discharged from the outlet 120.

[0045] A rotating cylinder 200 is sleeved on the outer periphery of the drying cylinder 100. The rotating cylinder 200 can rotate relative to the drying cylinder 100. There is a cavity between the rotating cylinder 200 and the drying cylinder 100, and this cavity is communicated with the air inlet 130. The heated gas enters this cavity from the air inlet 130, specifically through a communication hole 220 provided at the upper end of the rotating cylinder 200. The gas enters the above-mentioned cavity from the air inlet 130 through the communication hole 220.

[0046] A drying tray 300 is arranged in the drying cylinder 100. The drying tray 300 is horizontally placed. First ventilation holes 310 are provided on the side wall of the drying tray 300, and second ventilation holes 320 are provided on the side wall of the drying cylinder 100. The first ventilation holes 310 and the second ventilation holes 320 correspond to each other one by one and are both communicated with the above-mentioned cavity. Therefore, the heated gas in the cavity blows towards the drying tray 300 through the first ventilation holes 310 and the second ventilation holes 320. After the grains enter the drying cylinder 100 from the inlet 110, they fall onto the drying tray 300. There are several drying trays 300 distributed up and down. A plurality of first ventilation holes 310 are provided on the side wall of each drying tray 300, and the second ventilation holes 320 on the side wall of the drying cylinder 100 are uniformly distributed in the vertical direction, specifically as Figure 6 shown.

[0047] A communication groove 330 is formed in the drying tray 300. The communication groove 330 allows grains to pass through the layers of drying trays 300. A scraping component is also provided on the drying tray 300. The scraping component is used to scrape the grains on the drying tray 300 into the communication groove 330. By providing the scraping component, the grains can be evenly dried and at the same time transported to the communication groove 330, so as to pass through the layers of drying trays 300.

[0048] To facilitate the connection of the vertically distributed drying trays 300 inside the drying cylinder 100, a limiting ring 160 is provided on the inner wall of the drying cylinder 100. There are multiple limiting rings 160, and the drying tray 300 is located between two adjacent limiting rings 160.

[0049] As Figure 4 shown, on the inner wall of the rotating cylinder 200, there are vertically distributed blocking blocks 210. The blocking blocks 210 are used to block the second ventilation holes 320 so that the heating gas cannot enter the drying tray 300 corresponding to the second ventilation holes 320 through the second ventilation holes 320. The length of the blocking blocks 210 gradually increases from top to bottom. When the rotating cylinder 200 rotates, the blocking blocks 210 rotate synchronously to gradually block the second ventilation holes 320 from bottom to top, and when rotating in the reverse direction, the blocked second ventilation holes 320 are gradually opened from top to bottom.

[0050] It should be noted that, as Figure 4 and Figure 6 shown, the blocking blocks 210 are evenly arranged in a circular array on the inner wall of the rotating cylinder 200, and the lengths of the blocking blocks 210 at different heights are different. One ends of several blocking blocks 210 are flush, while the other ends have different lengths. The length of the lowermost blocking block 210 is the longest, and the longest length is the distance between two adjacent second ventilation holes 320. The blocking blocks 210 gradually become shorter from bottom to top. In the initial state, the flush ends of the blocking blocks 210 of the rotating cylinder 200 are close to the second ventilation holes 320 on the drying cylinder 100 and do not block the second ventilation holes 320. When the rotating cylinder 200 rotates counterclockwise (counterclockwise as viewed from above the rotating cylinder 200 to below), the lowermost blocking block 210 blocks the second ventilation holes 320 at the corresponding height. When continuing to rotate, the second-lowest layer will also block the second ventilation holes 320 at the corresponding height. When continuing to rotate, the subsequent blocking blocks 210 from bottom to top gradually block the second ventilation holes 320 at the corresponding height. When rotating in the reverse direction, that is, clockwise (counterclockwise as viewed from above the rotating cylinder 200 to below), the blocked second ventilation holes 320 at the corresponding height can be gradually opened from top to bottom.

[0051] When the second ventilation hole 320 is blocked, no heating gas passes through the corresponding drying tray 300. The area below the corresponding height of the second ventilation hole 320 is the slow-settling area, and the area before entering the slow-settling area is set as the drying area. The function of the slow-settling area is to keep the dried grains at a certain temperature and humidity, so that the temperature and moisture content of the grains are evenly distributed, prevent the grains from shrinking sharply due to rapid cooling, and at the same time strengthen the even distribution of the moisture content of the grains to avoid quality problems such as mildew and germination during subsequent storage and processing.

[0052] The structure of the rotating cylinder 200 of the present application can adjust the length of the above-mentioned slow-settling area. For example, Figure 2 , Figure 4 and Figure 6 As shown, when the humidity of the grains is low, after passing through a small number of drying trays 300, the humidity requirement for entering the slow-settling area is reached. The rotating cylinder 200 rotates counterclockwise (counterclockwise when looking from above to below the rotating cylinder 200). The blocking block 210 on the rotating cylinder 200 gradually blocks the second ventilation hole 320 at the corresponding height from bottom to top, which also increases the length of the slow-settling area. Correspondingly, the drying area will decrease, so that when the humidity of the grains reaches the requirement for entering the slow-settling area, they just enter the slow-settling area. Similarly, if the humidity of the grains is high and more drying trays 300 are needed to reach the humidity requirement for entering the slow-settling area, the rotating cylinder 200 rotates clockwise (counterclockwise when looking from above to below the rotating cylinder 200). The blocking block 210 on the rotating cylinder 200 gradually stops blocking the second ventilation hole 320 at the corresponding height from top to bottom, which also shortens the length of the slow-settling area. Correspondingly, the drying area will increase, so that when the humidity of the grains reaches the requirement for entering the slow-settling area, they just enter the slow-settling area. After the grains reach the requirement of the slow-settling area and enter the slow-settling area, the water distribution of the grains can be made more uniform, improving the drying quality of the grains.

[0053] It should be noted that the humidity of the grains can be detected before drying the grains. The rotation of the rotating drum 200 can be adjusted according to the humidity of the grains, and the rotation direction and distance of the rotating drum 200 can be adjusted according to the humidity of the grains so as to adapt to the drying of grains with different humidities. For example, before the grains enter the drying drum 100, a humidity detection instrument can be used to detect the humidity of the grains. Among them, to ensure the detection accuracy, sampling detection needs to be carried out in different areas, and the detection results are averaged to improve the detection accuracy. After the humidity of the grains is detected, the rotation direction and rotation distance of the rotating drum 200 can be adjusted according to the humidity of the grains. When the detected humidity of the grains is set to be small (no accurate value is selected in this embodiment, and the accurate value when the humidity of the grains is small can be determined according to the actual situation, and no specific limitation is made here), the rotating drum 200 is rotated counterclockwise to reduce the drying area. Correspondingly, the slow-settling area increases; at the same time, when the detected humidity of the grains is set to be large (no accurate value is selected in this embodiment, and the accurate value when the humidity of the grains is large can be determined according to the actual situation, and no specific limitation is made here), the rotating drum 200 is rotated clockwise to increase the drying area. Correspondingly, the slow-settling area decreases.

[0054] Of course, in other embodiments of the present invention, a humidity sensor (not shown in the figure) can also be installed in the drying drum 100. The humidity sensor can obtain the humidity change of the grains in the drying drum 100. It can be understood that as the grains are dried, the humidity data of the grains obtained by the humidity sensor gradually decreases. Therefore, a preset value is set, and this preset value is the humidity value when the humidity of the grains reaches the requirement for entering the slow-settling area. When the humidity value of the grains decreases to the preset value, the humidity sensor sends a signal to drive the rotation of the rotating drum 200. Then, when the humidity value of the grains meets the requirement for entering the slow-settling area, the rotating drum 200 rotates to adjust the grains to enter the slow-settling area.

[0055] Specifically, the shape of the communication groove 330 is an annular groove. A limiting ring 400 is arranged below the communication groove 330. The limiting ring 400 is adapted to the communication groove 330. However, the limiting ring 400 is located below the communication groove 330 and the limiting ring 400 does not block the communication groove 330. The space between the limiting ring 400 and the communication groove 330 allows the grains to pass through. By controlling the vertical movement of the limiting ring 400, the space between the limiting ring 400 and the communication groove 330 can be adjusted. Since this space allows the grains to pass through, if the space increases or decreases, the flow rate of the grains can be increased or decreased. In the slow-settling area, it is necessary to reduce the flow rate of the grains so that the grains can stay in the slow-settling area for a longer time. Therefore, the space between the communication groove 330 on the drying tray 300 in the slow-settling area and the limiting ring 400 is small, thereby slowing down the flow rate of the grains in the slow-settling area.

[0056] Specifically, the space between the limiting ring 400 and the communication groove 330 is reduced by the shielding block 210. Specifically as follows:

[0057] As Figure 2 , Figure 3 , Figure 4 and Figure 6 shown, a baffle 410 is provided on the outer periphery of the limiting ring 400. The baffle 410 passes through the first ventilation hole 310 and the second ventilation hole 320 and extends into the cavity between the rotary drum 200 and the drying drum 100. One end of the shielding block 210 on the inner wall of the rotary drum 200 has an inclined surface. When the rotary drum 200 rotates to drive the shielding block 210 to rotate synchronously, during the process that the shielding block 210 changes from not shielding the second ventilation hole 320 to shielding the second ventilation hole 320, the inclined surface of the shielding block 210 contacts the baffle 410 extending out of the second ventilation hole 320. Since the baffle 410 is restricted from rotating in the second ventilation hole 320, the inclined surface of the shielding block 210 drives the baffle 410 to move upward, so that the limiting ring 400 moves upward synchronously, thereby reducing the space between the limiting ring 400 and the communication groove 330, and blocking the second ventilation hole 320 at this position. Since the drying tray 300 corresponding to the second ventilation hole 320 shielded by the shielding block 210 belongs to the slow-susceptibility area, the grains on the drying tray 300 in the slow-susceptibility area pass through the communication groove 330 at a slower speed, and the slow-susceptibility effect is better.

[0058] It should be noted that, in order to reset the limiting ring 400, elastic pieces 420 are provided on the upper surface of the limiting ring 400. There are multiple elastic pieces 420 and they are arranged in a circumferential array on the upper surface of the limiting ring 400. The elastic pieces 420 are located between the limiting ring 400 and the drying tray 300. When the shielding block 210 does not contact the baffle 410, the elastic pieces 420 are in their original lengths. At this time, the space between the limiting ring 400 and the communication groove 330 is normal, and the grains pass through the communication groove 330 normally; when the rotary drum 200 rotates to drive the shielding block 210 to push the baffle 410 upward, the elastic pieces 420 are compressed and deformed. At this time, the space between the limiting ring 400 and the communication groove 330 becomes smaller, reducing the flow rate of the grains; when the rotary drum 200 rotates in the opposite direction to drive the shielding block 210 to disengage from the baffle 410, the limiting ring 400 moves downward under the action of the reset of the elastic pieces 420 to increase the space size between the limiting ring 400 and the communication groove 330 so as to be reset.

[0059] In a further embodiment, as Figure 2 , Figure 3 and Figure 5 shown, the scraping assembly includes a scraping plate 500 and scraping rods 510. The scraping plate 500 is rotatably arranged at the central position of the drying tray 300, and the scraping rods 510 are fixedly arranged on the outer periphery of the scraping plate 500. There are several scraping rods 510 and the shape of the scraping rods 510 is serrated. The cross-section of the scraping rods 510 is triangular with the tip facing upward. When the scraping plate 500 drives the scraping rods 510 to rotate, the scraping rods 510 convey the grains into the communication groove 330. For example, taking Figure 2 ,Figure 3 and Figure 5 As shown in Figure 5 , when the scraping disc 500 rotates clockwise, the serrated scraping rod 510 also rotates clockwise, and the serrated tip of the scraping rod 510 located behind the clockwise rotation is directly above the communication groove 330, that is, the V-shaped groove corresponding to the tip is directly above the communication groove 330. When the scraping rod 510 rotates clockwise, the V-shaped groove has an effect of gathering the grains, so that the grains fall onto the next drying disc 300 through the communication groove 330.

[0060] It should be noted that by setting the serrated scraping rod 510, and the cross-section of the scraping rod 510 is triangular with the tip facing upward, when the scraping rod 510 pushes the grains, the force between the grains is small, and there are multiple communication grooves 330 provided on the drying disc 300, which reduces the distance that the grains are pushed by the scraping rod 510 on the drying disc 300, and further reduces the phenomenon that the grains are crushed by the scraping rod 510.

[0061] In a further embodiment, a dispersion disc 600 is provided below the drying disc 300. The dispersion disc 600 is specifically located below the limiting ring 400. The dispersion disc 600 is rotatably provided below the drying disc 300. The dispersion disc 600 is coaxial with the scraping disc 500 and the two rotate synchronously. A dispersion rod 610 is fixedly provided on the outer periphery of the dispersion disc 600. There are also several dispersion rods 610 and they are also serrated. The cross-section of the dispersion rod 610 is also triangular with the tip facing upward. The dispersion rod 610 and the scraping rod 510 are arranged in an interleaved manner, that is, when looking from top to bottom, the two do not coincide but alternate with each other.

[0062] When the grains fall onto another drying disc 300 through the communication groove 330, they will pass through the dispersion rod 610. The cross-section of the dispersion rod 610 is triangular with the tip facing upward. After the grains pass through the dispersion rod 610, they will disperse and fall, so that the heating gas can evenly dry the grains.

[0063] For the convenience of connection, a first spline 520 is provided at the upper end of the rotating shaft of the scraping disc 500, and a key groove 530 is provided at the lower end of the scraping disc 500. A second spline 620 is provided at the upper end of the rotating shaft of the dispersion disc 600. The second spline 620 is located in the key groove 530, that is, as shown in Figure 5 (normally, the position of the key groove 530 cannot be shown. To show the positional relationship between the key groove 530 and the first spline 520, the position of the key groove 530 is added to Figure 5 ), the position of the key groove 530 and the position of the first spline 520 are staggered, so that the positions of the first spline 520 and the second spline 620 are staggered, and further the scraping rod 510 of the scraping disc 500 and the dispersion rod 610 of the dispersion disc 600 are arranged in an interleaved manner. Figure 5 shown (normally Figure 5 the position of the key groove 530 should not be shown. To show the positional relationship between the key groove 530 and the first spline 520, the position of the key groove 530 is added to Figure 5 it)

[0064] Specifically, a driving assembly 700 is provided on the drying cylinder 100. The driving assembly 700 is used to drive the scraping disc 500 and the dispersion disc 600 to rotate. The driving assembly 700 includes a driving motor 710 and a transmission shaft 720. The driving motor 710 is fixedly arranged on the drying cylinder 100. The transmission shaft 720 is fixedly connected to the rotating shaft of the driving motor 710. The first spline 520 at the upper end of the rotating shaft of the scraping disc 500 is connected to the transmission shaft 720. The scraping disc 500 and the dispersion disc 600 are connected through a keyway 530 and a second spline 620. The driving motor 710 drives the transmission shaft 720 to rotate, and the transmission shaft 720 drives the scraping disc 500 and the dispersion disc 600 to rotate synchronously.

[0065] In a further embodiment, an external motor (not shown in the figure) is provided on the drying cylinder 100. The external motor is used to drive the rotating cylinder 200 to rotate, and the rotation of the rotating cylinder 200 further adjusts the length of the slow-down area.

[0066] It should be noted that the external motor can be manually controlled to start. For example, after obtaining the specific humidity value through a humidity detector before the grains enter the drying cylinder 100, the operator can control the external motor to adjust the rotation direction and distance of the rotating cylinder 200 to adjust the length of the slow-down area according to the obtained grain humidity value. If a humidity sensor is provided in the drying cylinder 100, the external motor can be automatically started through a control program. The external motor drives the rotating cylinder 200 to rotate to adjust the length of the slow-down area. And the control program in this embodiment can be a computer program or a PLC program (the control program can realize performing corresponding adjustments to the rotation direction and distance of the rotating cylinder 200 according to the data obtained by the humidity sensor. It is not specifically limited here what kind of control program it is). The humidity value of the grains is obtained in real time through the humidity sensor and automatically input into the computer program or the PLC program. The computer program or the PLC program obtains and processes the data to control the external motor to drive the rotating cylinder 200 to rotate so as to be able to adjust the length of the slow-down area.

[0067] In a further embodiment, a support frame 150 is provided at the bottom of the drying cylinder 100. The support frame 150 is used to support the drying cylinder 100 and provides space for the discharge port 120 to facilitate discharging.

[0068] Combined with the above embodiments, the specific working process of a drying device for grain processing provided by the present application is described as follows:

[0069] The heating gas is introduced from the air inlet 130 into the cavity between the rotating cylinder 200 and the drying cylinder 100, and then the heating gas enters the drying cylinder 100 through the second ventilation holes 320 and the first ventilation holes 310, and the temperature in the drying cylinder 100 gradually increases.

[0070] Start the drive motor 710. The drive motor 710 drives the scraping disc 500 and the dispersion disc 600 to rotate synchronously, and feeds the grains to be dried into the drying cylinder 100 from the feed inlet 110. The grains fall onto the drying tray 300. The rotation of the scraping disc 500 on the drying tray 300 drives the scraping rod 510 to rotate. The scraping rod 510 gathers the grains falling on the drying tray 300 to the communication groove 330. The grains fall onto another drying tray 300 through the space between the communication groove 330 and the limiting ring 400. During the process of falling onto another drying tray 300, the grains pass through the dispersion rods 610 on the dispersion disc 600, and the dispersion rods 610 disperse the grains, enabling the grains to be in uniform contact with the heating gas.

[0071] When the grains fall onto the next drying tray 300, the process is the same as when they fall onto the previous drying tray 300. The difference is that the humidity of the grains falling onto the next drying tray 300 is lower than that of the grains falling onto the previous drying tray 300. When the humidity of the grains decreases to meet the humidity requirement for entering the slow-settling area, the external motor drives the rotating cylinder 200 to rotate. The blocking block 210 on the inner wall of the rotating cylinder 200 blocks the corresponding part of the second ventilation holes 320 of the lower drying tray 300 (there are many drying trays 300 arranged from top to bottom, and the grains also flow from top to bottom. The lower drying tray 300 refers to the drying tray 300 that the grains have not flowed through, and the area where this part of the drying trays 300 is located becomes the slow-settling area) to form the slow-settling area.

[0072] If the humidity of the grains is low, the grains reach the humidity requirement for entering the slow-settling area after passing through fewer drying trays 300. The rotation of the rotating cylinder 200 drives the blocking block 210 to block the corresponding part of the second ventilation holes 320 of the next drying tray 300 and the subsequent drying trays 300, so that the grains just enter the slow-settling area after reaching the humidity requirement for entering the slow-settling area. While the blocking block 210 blocks the second ventilation holes 320, the inclined surface of the blocking block 210 pushes the baffle 410 on the limiting ring 400 upward, thereby causing the limiting ring 400 to move upward to compress the elastic piece 420. The space between the limiting ring 400 and the communication groove 330 decreases, and the flow rate of the grains in the communication groove 330 in the slow-settling area slows down, and the slow-settling effect is better, thus improving the drying quality of the grains.

[0073] If the humidity of the grains is relatively high, the grains need to pass through a relatively large number of drying trays 300 to meet the humidity requirement for entering the tempering area. The rotating drum 200 rotates in the reverse direction to drive the shielding block 210 to open the second ventilation holes 320 corresponding to the excessive length of the tempering area, shortening the length of the tempering area, so that the grains just enter the tempering area after meeting the humidity requirement for entering the tempering area. When the shielding block 210 opens the second ventilation holes 320, the shielding block 210 no longer restricts the baffle 410, that is, the limiting ring 400 is no longer restricted. The elastic piece 420 on the limiting ring 400 resets and then pushes the limiting ring 400 to move downward to reset, so that the space between the limiting ring 400 and the communication groove 330 returns to normal, thereby increasing the drying area and reducing the tempering area, ensuring that the grains just enter the tempering area after the humidity reaches the requirement and preventing them from entering the tempering area when the humidity is too high.

[0074] After drying is completed, it is discharged from the discharge port 120, and the discharged grains can be collected.

[0075] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0076] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A drying device for grain processing, characterized in that, Comprising: A drying cylinder, on which a feed inlet, an air inlet and an air outlet are provided; A rotary cylinder, which is sleeved on the outer periphery of the drying cylinder and can rotate. There is a cavity between the rotary cylinder and the drying cylinder, and the cavity is communicated with the air inlet; Drying trays, which are horizontally arranged in the drying cylinder. First ventilation holes are provided on the side walls of the drying trays. Second ventilation holes are provided on the side walls of the drying cylinder. The first ventilation holes and the second ventilation holes correspond to each other one by one. The cavity is communicated with the first ventilation holes and the second ventilation holes. There are several drying trays which are distributed up and down. Communication grooves are provided on the drying trays, and grains fall layer by layer through the communication grooves; A scraping assembly, which is located on the drying tray and is used for conveying grains into the communication grooves; Blocking blocks are arranged on the inner wall of the rotary cylinder in an up-and-down distribution. The blocking blocks are used for blocking the second ventilation holes. The length of the blocking blocks gradually increases from top to bottom. When the rotary cylinder rotates, the blocking blocks drive the second ventilation holes to be gradually blocked from bottom to top, and when rotating in the reverse direction, the blocked second ventilation holes are gradually opened from top to bottom.

2. The drying equipment for grain processing according to claim 1, characterized in that, The communication groove is an annular groove. A limiting ring is arranged below the communication groove. There is a space between the communication groove and the limiting ring. Grains pass through the space between the limiting ring and the communication groove. The limiting ring can move in the vertical direction to change the size of the space between the limiting ring and the communication groove so as to change the flow rate of the grains; The limiting ring is configured to move upward to reduce the space between the limiting ring and the communication groove when the blocking block blocks the second ventilation hole, and increase the space between the limiting ring and the communication groove when the blocking block opens the blocked second ventilation hole.

3. The drying equipment for grain processing according to claim 2, wherein A baffle is arranged on the outer periphery of the limiting ring. The baffle passes through the first ventilation hole and the second ventilation hole. One end of the blocking block on the rotary cylinder has an inclined surface. When the rotary cylinder rotates, it drives the baffle to move vertically on the inclined surface of the blocking block.

4. The drying equipment for grain processing according to claim 1, characterized in that, The scraping assembly includes a scraping disc and scraping rods. The scraping disc is rotatably arranged at the center of the drying tray. The scraping rods are fixedly arranged on the outer peripheral surface of the scraping disc, and there are several scraping rods. The shape of the scraping rods is serrated, and the cross section of the scraping rods is triangular with the tip facing upward. When the scraping disc rotates, the scraping rods scrape grains, and the scraping rods gather the grains into the communication grooves.

5. The drying equipment for grain processing according to claim 4, characterized in that, A dispersing disc is arranged below the drying tray. Dispersing rods are arranged on the outer periphery of the dispersing disc. The shape of the dispersing rods is serrated, and the cross section of the dispersing rods is triangular with the tip facing upward. After the grains pass through the communication grooves, they pass through the tips of the dispersing rods to be dispersed.

6. The drying equipment for grain processing according to claim 5, characterized in that The dispersing rods and the scraping rods are arranged alternately.

7. The drying equipment for grain processing according to claim 6, wherein, A driving assembly is arranged on the drying cylinder, and the driving assembly is used for driving the scraping disc and the dispersing disc to rotate.

8. The drying equipment for grain processing according to claim 7, characterized in that, The driving assembly includes a driving motor and a transmission shaft. The driving motor is fixedly arranged on the drying cylinder. The transmission shaft is fixedly connected with the rotating shaft of the driving motor. The scraping disc and the dispersing disc are both coaxially connected to the transmission shaft.

9. The drying equipment for grain processing according to claim 8, characterized in that, A first spline is provided at the upper end of the rotating shaft of the scraping disc, and the first spline is connected to the transmission shaft. A keyway is formed in the lower end of the rotating shaft of the scraping disc. A second spline is provided at the upper end of the rotating shaft of the dispersing disc, and the second spline is located in the keyway. The keyway and the first spline are arranged in a staggered manner.

10. The drying equipment for grain processing according to claim 1, characterized in that, A support frame is provided below the drying cylinder, and the support frame is used to support the drying cylinder.

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