Drying equipment for grain processing

Abstract

The invention relates to the technical field of drying, in particular to drying equipment for grain processing, which comprises a drying cylinder, a rotating cylinder is sleeved on the periphery of the drying cylinder, a cavity is arranged between the rotating cylinder and the drying cylinder, drying plates distributed up and down are arranged in the drying cylinder, first ventilation holes are formed in the side wall of the drying plates, and second ventilation holes are formed in the side wall of the drying cylinder. Sheltering blocks with the lengths gradually increased from top to bottom are arranged on the inner wall of the rotary drum, and the number of the second ventilation holes sheltered by the sheltering blocks can be adjusted when the rotary drum rotates, so that the length of the tempering area is adjusted, the length of the tempering area can be adaptively adjusted according to the humidity of the grains, and the tempering effect of the grains is good; the moisture content of the grains is uniformly distributed, so that the quality problems of mildewing, germination and the like in the subsequent storage and processing processes are avoided, and the drying quality of the grains is improved.

Description

Technical Field

[0001] The invention relates to the technical field of drying, in particular to drying equipment for grain processing. Background Art

[0002] Drying equipment is widely used in agriculture, food processing, chemical industry, medicine and other fields to reduce the moisture content of materials for storage, transportation and further processing. For example, it is used in the field of drying grains, specifically to reduce the moisture content for storage and further processing. Proper use of grain drying equipment can prevent grains from becoming moldy, deteriorating and losing nutrients. Chinese patent CN213090395U discloses an inner core structure of grain drying equipment. This scheme divides the dryer from top to bottom into a slow-flowing and even-mixing section, a drying section and a discharging section. The slow-flowing and even-mixing section is highly consistent with the drying section, and the slow-flowing and even-mixing section is equipped with a barrier drying device, thereby completing the drying operation of the grains.

[0003] However, when drying grains of different humidity levels in the above scheme, grains with higher or lower humidity may enter the slow-hardening and even-material section with humidity higher or lower than that required for slow-hardening, resulting in poor slow-hardening effect of the grains in the slow-hardening and even-material section, thus affecting the quality of the finished product. Summary of the invention

[0004] Based on this, it is necessary to provide a drying equipment for grain processing to address the problem that the different humidity levels of grains entering the slow-softening section affect the drying quality of the grains in the slow-softening section.

[0005] The above purpose is achieved through the following technical solutions: A drying device for grain processing, comprising: A drying cylinder, wherein the drying cylinder is provided with a feed inlet, an air inlet and an air outlet; A rotary drum, the rotary drum is sleeved on the outer circumference of the drying drum and can rotate, a cavity is provided between the rotary drum and the drying drum, and the cavity is communicated with the air inlet; A drying plate, the drying plate is horizontally arranged in the drying cylinder, a first ventilation hole is opened on the side wall of the drying plate, a second ventilation hole is opened on the side wall of the drying cylinder, the first ventilation hole corresponds to the second ventilation hole one by one, the cavity is connected with the first ventilation hole and the second ventilation hole, there are a plurality of drying plates and they are distributed up and down, the drying plate is provided with a connecting groove, and the grains fall down layer by layer through the connecting groove; A scraping assembly, the scraping assembly is located on the drying plate, and the scraping assembly is used to transport the grains into the connecting groove; The inner wall of the rotating drum is provided with blocking blocks distributed up and down, and the blocking blocks are used to block the second ventilation holes. The length of the blocking blocks gradually increases from top to bottom. When the rotating drum rotates, the blocking blocks are driven to gradually block the second ventilation holes from bottom to top, and when the rotating drum rotates in the opposite direction, the blocked second ventilation holes are gradually opened from top to bottom.

[0006] Further, the connecting groove is an annular groove, a limiting ring is arranged below the connecting groove, a space is provided between the connecting groove and the limiting ring, the grain passes through the space between the limiting ring and the connecting groove, and the limiting ring can move in a vertical direction to change the size of the space between the limiting ring and the connecting groove to change the flow speed of the grain; The limiting ring is configured to move upward to reduce the space between the limiting ring and the connecting groove when the blocking block blocks the second ventilation hole, and to increase the space between the limiting ring and the connecting groove when the blocking block opens the blocked second ventilation hole.

[0007] Furthermore, a baffle is provided on the outer periphery of the limiting ring, and the baffle passes through the first ventilation hole and the second ventilation hole. One end of the blocking block on the rotating drum has an inclined surface, and the rotation of the rotating drum drives the baffle to move vertically on the inclined surface of the blocking block.

[0008] Furthermore, the scraping assembly includes a scraping plate and a scraping rod, the scraping plate is rotatably arranged at the center of the drying plate, the scraping rod is fixedly arranged on the outer peripheral surface of the scraping plate, and there are several scraping rods, the scraping rods are serrated in shape, and the cross-section of the scraping rods is triangular with the tip facing upward, the scraping plate rotates the scraping rod to scrape the grains, and the scraping rods gather the grains to the connecting groove.

[0009] Furthermore, a dispersion plate is arranged below the drying plate, and dispersion rods are arranged on the outer periphery of the dispersion plate. The dispersion rods are sawtooth-shaped, and the cross-section of the dispersion rods is triangular, with the tip facing upward. After the grains pass through the connecting groove, they pass through the tip of the dispersion rod to be dispersed.

[0010] Furthermore, the dispersion rods and the scraping rods are arranged alternately.

[0011] Furthermore, a driving assembly is provided on the drying cylinder, and the driving assembly is used to drive the scraping disk and the dispersion disk to rotate.

[0012] 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, and the scraper disk and the dispersion disk are coaxially connected to the transmission shaft.

[0013] Furthermore, a first spline is provided at the upper end of the rotating shaft of the scraper, and the first spline is connected to the transmission shaft. A key slot is provided on the lower end of the rotating shaft of the scraper, and a second spline is provided at the upper end of the rotating shaft of the dispersion disk, and the second spline is located in the key slot. The key slot and the first spline are staggered.

[0014] Furthermore, a support frame is provided below the drying cylinder, and the support frame is used to support the drying cylinder.

[0015] The beneficial effects of the present invention are: The present invention adjusts the length of the slow revival zone by setting a rotating drum structure, so that the length of the slow revival zone can be adjusted according to the humidity adaptability of the grains, thereby achieving a better slow revival effect on the grains and making the moisture content of the grains evenly distributed, thereby avoiding quality problems such as mildew and germination during subsequent storage and processing, thereby improving the drying quality of the grains.

[0016] The present invention provides a scraping rod with a sawtooth shape, a triangular cross section and an upward tip, so that the scraping rod causes less damage to the grains when scraping the grains, reduces the force between the grains, and reduces the probability of the grains being crushed.

[0017] The invention provides a dispersion rod with a sawtooth shape and a triangular cross section and a tip facing upward, so that the grains are evenly dispersed after passing through the dispersion rod, so that the grains are evenly heated and the drying effect of the grains is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a drying device for grain processing provided by one embodiment of the present invention; Figure 2 A schematic diagram of the internal structure of a drying device for grain processing provided by an embodiment of the present invention; Figure 3 An exploded view of a drying plate of a drying device for grain processing provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a rotary drum of a grain processing drying device provided in one embodiment of the present invention; Figure 5 A schematic diagram of the structure of a scraping assembly of a grain processing drying device provided in one embodiment of the present invention; Figure 6 A cross-sectional view of a drying drum of a drying device for grain processing provided in one embodiment of the present invention.

[0019] in: 100, drying cylinder; 110, feed port; 120, discharge port; 130, air inlet; 140, air outlet; 150, support frame; 160, limit ring; 200, rotating drum; 210, shielding block; 220, connecting hole; 300, drying plate; 310, first ventilation hole; 320, second ventilation hole; 330, connecting groove; 400, a limiting ring; 410, a baffle; 420, a spring; 500, scraper plate; 510, scraper rod; 520, first spline; 530, keyway; 600, dispersion plate; 610, dispersion rod; 620, second spline; 700, driving assembly; 710, driving motor; 720, transmission shaft. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is 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.

[0021] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is 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 cannot be understood as a limitation to the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] Refer to the following Figure 1-Figure 6 To describe a drying equipment for grain processing provided by the present application.

[0024] A drying device for grain processing is suitable for drying grains, comprising a drying cylinder 100. A feed 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 feed inlet 110, and heated gas enters the drying cylinder 100 from the air inlet 130 to dry the grains, and then is discharged through the air outlet 140 to form a gas flow to uniformly heat the grains. A discharge port 120 is provided at the bottom of the drying cylinder 100, and the dried grains are discharged from the discharge port 120.

[0025] A rotating drum 200 is sleeved on the outer circumference of the drying drum 100, and the rotating drum 200 can rotate relative to the drying drum 100. There is a cavity between the rotating drum 200 and the drying drum 100, and the cavity is connected to the air inlet 130. The heated gas enters the cavity from the air inlet 130, specifically through the connecting hole 220 opened at the upper end of the rotating drum 200, and the gas enters the above-mentioned cavity from the air inlet 130 through the connecting hole 220.

[0026] A drying tray 300 is arranged in the drying cylinder 100, and the drying tray 300 is placed horizontally. A first ventilation hole 310 is opened on the side wall of the drying tray 300, and a second ventilation hole 320 is opened on the side wall of the drying cylinder 100. The first ventilation hole 310 and the second ventilation hole 320 correspond to each other one by one and are both connected with the above-mentioned cavity, so the heated gas in the cavity is blown toward the drying tray 300 through the first ventilation hole 310 and the second ventilation hole 320, and the grain enters the drying cylinder 100 from the feed inlet 110 and then falls on the drying tray 300. There are several drying trays 300 and they are distributed up and down. Each drying tray 300 has several first ventilation holes 310 on its side wall, and the second ventilation holes 320 on the side wall of the drying cylinder 100 are evenly distributed in the vertical direction. Figure 6 shown.

[0027] A connecting groove 330 is provided on the drying tray 300, and the connecting groove 330 allows the grains to pass through the layers of drying trays 300. A scraping component is also provided on the drying tray 300, and the scraping component is used to scrape the grains on the drying tray 300 into the connecting groove 330. Through the setting of the scraping component, the grains can be evenly dried and transported to the connecting groove 330, thereby passing through the layers of drying trays 300.

[0028] In order to facilitate the connection of the drying trays 300 distributed up and down in 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 .

[0029] like Figure 4As shown, baffle blocks 210 distributed up and down are provided on the inner wall of the drum 200, and the baffle blocks 210 are used to block the second ventilation holes 320 so that the heated gas cannot pass through the second ventilation holes 320 into the drying plate 300 corresponding to the second ventilation holes 320. The length of the baffle blocks 210 gradually increases from top to bottom. When the drum 200 rotates, the baffle blocks 210 rotate synchronously to gradually block the second ventilation holes 320 from bottom to top, and when rotating in the opposite direction, the blocked second ventilation holes 320 are gradually opened from top to bottom.

[0030] It should be noted that Figure 4 and Figure 6 As shown, the shielding blocks 210 are arranged in a circular uniform array on the inner wall of the drum 200, and the lengths of the shielding blocks 210 at different heights are different. One end of several shielding blocks 210 is flush, while the other ends are of different lengths. The length of the bottom shielding block 210 is the longest, and the longest length is the distance between two adjacent second vents 320. The shielding blocks 210 gradually become shorter from bottom to top. In the initial state, the flush end of the shielding block 210 of the drum 200 is close to the second vent 320 on the drying drum 100 and does not block the second vent 320. When the drum 200 rotates counterclockwise (counterclockwise from the top to the bottom of the drum 200), the bottom shielding block 210 blocks the second vent 320 at the corresponding height. When the drum 200 continues to rotate, the second to last layer also blocks the second vent 320 at the corresponding height. When the drum 200 continues to rotate, the subsequent shielding blocks 210 from bottom to top gradually block the second vent 320 at the corresponding height. When rotating in the reverse direction, that is, rotating clockwise (counterclockwise when viewed from the top to the bottom of the rotating drum 200), the blocked second ventilation holes 320 of the corresponding height can be gradually opened from top to bottom.

[0031] When the second ventilation hole 320 is blocked, no heating gas passes through the corresponding drying plate 300, and the area below the height corresponding to the second ventilation hole 320 is the slow recovery zone, and the area before entering the slow recovery zone is set as the drying zone. The function of the slow recovery zone is to keep the dried grains warm under certain temperature and humidity conditions so that the temperature and moisture content of the grains are evenly distributed, preventing the grains from shrinking rapidly due to excessive cooling, and at the same time enhancing the uniform distribution of the moisture content of the grains to avoid quality problems such as mildew and germination during subsequent storage and processing.

[0032] The structure of the drum 200 of the present application can adjust the length of the above-mentioned slow zone, for example, Figure 2 , Figure 4 and Figure 6As shown, if the humidity of the grain is low, after passing through a small number of drying plates 300 to reach the humidity requirement for entering the slow recovery zone, the drum 200 rotates counterclockwise (counterclockwise as viewed from the top to the bottom of the drum 200), and the shielding blocks 210 on the drum 200 gradually block the second ventilation holes 320 of the corresponding height from bottom to top, thereby increasing the length of the slow recovery zone and reducing the corresponding drying zone, so that the grain enters the slow recovery zone just when the humidity reaches the requirement for entering the slow recovery zone; similarly, if the humidity of the grain is high, it needs to pass through more drying plates 300 to reach the humidity requirement for entering the slow recovery zone, and the drum 200 rotates clockwise (counterclockwise as viewed from the top to the bottom of the drum 200), and the shielding blocks 210 on the drum 200 gradually stop blocking the second ventilation holes 320 of the corresponding height from top to bottom, thereby shortening the length of the slow recovery zone and increasing the corresponding drying zone, so that the grain enters the slow recovery zone just when the humidity reaches the requirement for entering the slow recovery zone. After the grains meet the requirements of the slow recovery zone, they enter the slow recovery zone, which can make the water distribution of the grains more even and improve the drying quality of the grains.

[0033] It should be noted that the humidity of the grains can be detected before drying, and the rotation of the drum 200 can be adjusted according to the humidity of the grains, and the rotation direction and distance of the drum 200 can be adjusted according to the humidity of the grains to adapt to the drying of grains with different humidity. For example, before the grains enter the drying drum 100, the humidity of the grains can be detected by a humidity detection instrument. In order to ensure the detection accuracy, it is necessary to sample and detect in different areas, and take the average value of the detection results to improve the detection accuracy. After the humidity of the grains is detected, the rotation direction and rotation distance of the drum 200 can be adjusted according to the humidity of the grains. When the detected humidity of the grains is set to be small (the present embodiment does not select an accurate value, and the accurate value when the humidity of the grains is small can be determined according to actual conditions, and no specific limitation is made here), the drum 200 is rotated counterclockwise to reduce the drying area, and accordingly, the slow recovery area increases; at the same time, when the detected humidity of the grains is set to be large (the present embodiment does not select an accurate value, and the accurate value when the humidity of the grains is large can be determined according to actual conditions, and no specific limitation is made here), the drum 200 is rotated clockwise to increase the drying area, and accordingly, the slow recovery area decreases.

[0034] 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 changes 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. The preset value is the humidity value at which the humidity of the grains reaches the requirement for entering the slow recovery zone. When the humidity value of the grains is reduced to the preset value, the humidity sensor sends a signal to drive the rotating drum 200 to rotate, and then the rotating drum 200 rotates to adjust the grains to enter the slow recovery zone after the humidity value of the grains meets the requirement for entering the slow recovery zone.

[0035] Specifically, the connecting groove 330 is in the shape of an annular groove, and a limiting ring 400 is arranged below the connecting groove 330. The limiting ring 400 is adapted to the connecting groove 330, but the limiting ring 400 is located below the connecting groove 330 and does not block the connecting groove 330. The space between the limiting ring 400 and the connecting groove 330 allows grains to pass through. The space between the limiting ring 400 and the connecting groove 330 is adjusted by controlling the limiting ring 400 to move in the vertical direction. Since the space allows grains to pass through, if the space is increased or decreased, the flow speed of the grains can be increased or decreased. In the slow recovery zone, the flow speed of the grains needs to be reduced so that the time the grains can stay in the slow recovery zone is increased. Therefore, the space between the connecting groove 330 and the limiting ring 400 on the drying plate 300 in the slow recovery zone is smaller, thereby slowing down the flow speed of the grains in the slow recovery zone.

[0036] Specifically, the space between the limiting ring 400 and the connecting groove 330 is reduced by the shielding block 210. The details are as follows: like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, a baffle 410 is provided on the outer periphery of the limiting ring 400, and the baffle 410 passes through the first ventilation hole 310 and the second ventilation hole 320 and extends into the cavity between the rotating drum 200 and the drying drum 100. One end of the blocking block 210 on the inner wall of the rotating drum 200 has a slope. When the rotating drum 200 rotates and drives the blocking block 210 to rotate synchronously, the blocking block 210 changes from not blocking the second ventilation hole 320 to blocking the second ventilation hole 320. The slope of the blocking 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 slope of the blocking 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 connecting groove 330, and blocking the second ventilation hole 320 at this location. Since the drying plate 300 corresponding to the second ventilation hole 320 blocked by the shielding block 210 belongs to the slow recovery zone, the speed at which the grains on the drying plate 300 in the slow recovery zone pass through the connecting groove 330 is slow, and the slow recovery effect is better.

[0037] It should be noted that, in order to reset the limiting ring 400, a spring piece 420 is provided on the upper surface of the limiting ring 400. There are multiple spring pieces 420 and they are arranged in a circular array on the upper surface of the limiting ring 400. The spring piece 420 is located between the limiting ring 400 and the drying plate 300. When the blocking block 210 is not in contact with the baffle 410, the spring piece 420 is at its original length. At this time, the space between the limiting ring 400 and the connecting groove 330 is normal, and the grains pass through the connecting groove 330 normally; when the drum 200 rotates to drive the blocking block 210 to push the baffle 410 to move upward, the spring piece 420 is compressed and deformed, and at this time the space between the limiting ring 400 and the connecting groove 330 becomes smaller, reducing the flow speed of the grains; when the drum 200 rotates in the direction to drive the blocking block 210 to separate from the baffle 410, the limiting ring 400 moves downward under the action of the resetting of the spring piece 420 to increase the space size between the limiting ring 400 and the connecting groove 330 and thus reset.

[0038] In a further embodiment, Figure 2 , Figure 3 and Figure 5 As shown, the scraping assembly includes a scraping plate 500 and a scraping rod 510. The scraping plate 500 is rotatably arranged at the center of the drying plate 300, and the scraping rod 510 is fixedly arranged at the periphery of the scraping plate 500. There are a plurality of scraping rods 510, and the shape of the scraping rods 510 is sawtooth-shaped. The cross section of the scraping rods 510 is triangular, and the tip is upward. When the scraping plate 500 drives the scraping rods 510 to rotate, the scraping rods 510 transport the grains to the connecting groove 330. For example, Figure 2 , Figure 3 and Figure 5 As shown, when the scraper plate 500 rotates clockwise, the serrated scraper rod 510 also rotates clockwise, and the serrated tip of the scraper rod 510 after the clockwise rotation is located directly above the connecting groove 330, that is, the V-shaped groove corresponding to the tip is located directly above the connecting groove 330. When the scraper rod 510 rotates clockwise, the V-shaped groove has a gathering effect on the grains, so that the grains pass through the connecting groove 330 and fall onto the next drying plate 300.

[0039] It should be noted that by providing a serrated scraper rod 510, and the cross-section of the scraper rod 510 is triangular with the tip facing upward, the force between the grains is smaller when the scraper rod 510 pushes the grains, and a plurality of connecting grooves 330 are provided on the drying plate 300, which reduces the distance that the grains are pushed by the scraper rod 510 on the drying plate 300, thereby reducing the phenomenon of the grains being crushed by the scraper rod 510.

[0040] In a further embodiment, a dispersion plate 600 is disposed below the drying plate 300. The dispersion plate 600 is specifically located below the limiting ring 400. The dispersion plate 600 is rotatably disposed below the drying plate 300. The dispersion plate 600 and the scraper plate 500 are coaxial and the two rotate synchronously. A dispersion rod 610 is fixedly disposed on the outer periphery of the dispersion plate 600. There are also a plurality of dispersion rods 610, which 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 scraper rod 510 are staggered, that is, when viewed from top to bottom, the two do not overlap, but alternate with each other.

[0041] When the grains pass through the connecting groove 330 and fall onto another drying plate 300, they will pass through the dispersion rods 610. The dispersion rods 610 have a triangular cross section with the tip facing upward. After passing through the dispersion rods 610, the grains will disperse and fall, so that the heated gas can evenly dry the grains.

[0042] For the convenience of connection, the upper end of the rotating shaft of the scraper 500 is provided with a first spline 520, and the lower end of the scraper 500 is provided with a keyway 530, and the upper end of the rotating shaft of the dispersion disk 600 is provided with a second spline 620, and the second spline 620 is located in the keyway 530, that is, Figure 5 As shown (normal Figure 5 The position of the keyway 530 cannot be displayed in the figure. To indicate the positional relationship between the keyway 530 and the first spline 520, the position of the keyway 530 is added to Figure 5 ), the position of the keyway 530 is staggered with the position of the first spline 520, 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 plate 500 and the dispersion rod 610 of the dispersion plate 600 are staggered.

[0043] Specifically, a driving assembly 700 is provided on the drying cylinder 100, and the driving assembly 700 is used to drive the scraper 500 and the dispersion disk 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, and the transmission shaft 720 is fixedly connected to the rotating shaft of the driving motor 710, and the first spline 520 at the upper end of the rotating shaft of the scraper 500 is connected to the transmission shaft 720, and the scraper 500 and the dispersion disk 600 are connected by 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 scraper 500 and the dispersion disk 600 to rotate synchronously.

[0044] In a further embodiment, an external motor (not shown in the figure) is provided on the drying cylinder 100, and the external motor is used to drive the rotating drum 200 to rotate, and the rotating drum 200 rotates to adjust the length of the slow recovery zone.

[0045] It should be noted that the external motor can be started manually. For example, after the specific humidity value is obtained by the humidity detector before the grain enters the drying drum 100, the operator can control the external motor and adjust the rotation direction and distance of the drum 200 to adjust the length of the buffer zone according to the obtained grain humidity value; if a humidity sensor is provided in the drying drum 100, the external motor can be automatically started by the control program, and the external motor drives the drum 200 to rotate and thus adjust the length of the buffer zone, and the control program in this embodiment can be a computer program or a PLC program (the control program can realize the corresponding adjustment of the rotation direction and distance of the drum 200 according to the data obtained by the humidity sensor, and the type of control program is not specifically limited here), the humidity value of the grain is obtained in real time through the humidity sensor, and the humidity value is automatically input into the computer program or the PLC program, the computer program or the PLC program obtains and processes the data, and then controls the external motor to drive the drum 200 to rotate, thereby adjusting the length of the buffer zone.

[0046] In a further embodiment, a support frame 150 is disposed at the bottom of the drying cylinder 100, and the support frame 150 is used to support the drying cylinder 100 and provide space for the discharge port 120 to facilitate discharge.

[0047] The specific working process of a grain processing drying device provided by the present application is described in combination with the above embodiments: The heated gas is introduced into the cavity between the rotating drum 200 and the drying cylinder 100 from the air inlet 130, and then 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.

[0048] The drive motor 710 is started, and the drive motor 710 drives the scraper plate 500 and the dispersion plate 600 to rotate synchronously, and the grains to be dried are added into the drying cylinder 100 from the feed port 110, and the grains fall onto the drying plate 300. The scraper plate 500 on the drying plate 300 rotates to drive the scraper rod 510 to rotate, and the scraper rod 510 gathers the grains falling on the drying plate 300 to the connecting groove 330, and the grains fall onto another drying plate 300 through the space between the connecting groove 330 and the limiting ring 400. In the process of falling onto another drying plate 300, the grains pass through the dispersion rod 610 on the dispersion plate 600, and the dispersion rod 610 disperses the grains so that the grains are evenly contacted with the heated gas.

[0049] When the grains fall on the next drying tray 300, the process is the same as that of falling on the previous drying tray 300. The difference is that the humidity of each grain falling on the next drying tray 300 is lower than that of the grains falling on the previous drying tray 300. When the humidity of the grains is reduced to meet the humidity requirement for entering the slow recovery zone, the external motor drives the drum 200 to rotate, and the blocking blocks 210 on the inner wall of the drum 200 block part of the second ventilation holes 320 corresponding to the drying tray 300 below (there are a large number of drying trays 300, which are arranged from top to bottom, and the grains also flow from top to bottom. The drying tray 300 below refers to the drying tray 300 that the grains have not flowed through, and the area where this part of the drying tray 300 is located becomes the slow recovery zone) to form a slow recovery zone.

[0050] If the humidity of the grain is low, the grain reaches the humidity requirement for entering the slow recovery zone after passing through fewer drying plates 300, and the rotation of the drum 200 drives the shielding block 210 to block the next drying plate 300 and part of the second ventilation holes 320 corresponding to the subsequent drying plates 300, so that the grain just enters the slow recovery zone after reaching the humidity requirement for entering the slow recovery zone. While the shielding block 210 blocks the second ventilation holes 320, the inclined surface of the shielding block 210 pushes the baffle 410 on the limiting ring 400 upward, so that the limiting ring 400 moves upward to compress the spring piece 420, and the space between the limiting ring 400 and the connecting groove 330 is reduced. The flow speed of the grain in the connecting groove 330 in the slow recovery zone is slowed down, and the slow recovery effect is better, thereby improving the drying quality of the grain.

[0051] If the humidity of the grain is high, the grain needs to pass through more drying plates 300 to reach the humidity requirement for entering the slow recovery zone. The reverse rotation of the drum 200 drives the shielding block 210 to open the second ventilation holes 320 corresponding to the excess length of the slow recovery zone, shortening the length of the slow recovery zone, so that the grain can enter the slow recovery zone just after reaching the humidity requirement for entering the slow recovery zone. At the same time 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, and the spring piece 420 on the limiting ring 400 is reset and then pushes the limiting ring 400 to move downward to reset, so that the space between the limiting ring 400 and the connecting groove 330 returns to normal, thereby increasing the drying area and reducing the slow recovery area, ensuring that the grain enters the slow recovery zone just after the humidity reaches the requirement, and avoiding entering the slow recovery zone when the humidity is too high.

[0052] After drying, the grains are discharged from the discharge port 120 and the discharged grains can be collected.

[0053] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A drying equipment for grain processing, characterized in that: include: A drying cylinder, wherein the drying cylinder is provided with a feed inlet, an air inlet and an air outlet; A rotary drum, the rotary drum is sleeved on the outer circumference of the drying drum and can rotate, a cavity is provided between the rotary drum and the drying drum, and the cavity is communicated with the air inlet; A drying plate, the drying plate is horizontally arranged in the drying cylinder, a first ventilation hole is opened on the side wall of the drying plate, a second ventilation hole is opened on the side wall of the drying cylinder, the first ventilation hole corresponds to the second ventilation hole one by one, the cavity is connected with the first ventilation hole and the second ventilation hole, there are a plurality of drying plates and they are distributed up and down, the drying plate is provided with a connecting groove, and the grains fall down layer by layer through the connecting groove; A scraping assembly, the scraping assembly is located on the drying plate, and the scraping assembly is used to transport the grains into the connecting groove; The inner wall of the rotating drum is provided with blocking blocks distributed up and down, and the blocking blocks are used to block the second ventilation holes. The length of the blocking blocks gradually increases from top to bottom. When the rotating drum rotates, the blocking blocks are driven to gradually block the second ventilation holes from bottom to top, and when the rotating drum rotates in the opposite direction, the blocked second ventilation holes are gradually opened from top to bottom.

2. The grain processing drying equipment according to claim 1, characterized in that: The connecting groove is an annular groove, a limiting ring is arranged below the connecting groove, a space is provided between the connecting groove and the limiting ring, the grain passes through the space between the limiting ring and the connecting groove, and the limiting ring can move in a vertical direction to change the size of the space between the limiting ring and the connecting groove to change the flow speed of the grain; The limiting ring is configured to move upward to reduce the space between the limiting ring and the connecting groove when the blocking block blocks the second ventilation hole, and to increase the space between the limiting ring and the connecting groove when the blocking block opens the blocked second ventilation hole.

3. The grain processing drying equipment according to claim 2, characterized in that: A baffle is provided on the outer periphery of the limiting ring, and the baffle passes through the first ventilation hole and the second ventilation hole. One end of the blocking block on the rotating drum has an inclined surface, and the rotation of the rotating drum drives the baffle to move vertically on the inclined surface of the blocking block.

4. The grain processing drying equipment according to claim 1, characterized in that: The scraping assembly includes a scraping plate and a scraping rod. The scraping plate is rotatably arranged at the center of the drying plate, and the scraping rod is fixedly arranged on the outer peripheral surface of the scraping plate. There are several scraping rods, and the scraping rods are serrated in shape, and the cross-section of the scraping rods is triangular with the tip facing upward. The scraping plate rotates the scraping rod to scrape the grains, and the scraping rods gather the grains to the connecting groove.

5. The grain processing drying equipment according to claim 4, characterized in that: A dispersion plate is arranged below the drying plate, and dispersion rods are arranged on the outer circumference of the dispersion plate. The dispersion rods are sawtooth-shaped, and the cross section of the dispersion rods is triangular, with the tip facing upward. After the grains pass through the connecting groove, they pass through the tip of the dispersion rod to be dispersed.

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

7. The grain processing drying equipment according to claim 6, characterized in that: The drying cylinder is provided with a driving assembly, and the driving assembly is used to drive the scraping disc and the dispersing disc to rotate.

8. The grain processing drying equipment according to claim 7, characterized in that: The driving assembly comprises 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 scraper disc and the dispersion disc are both coaxially connected to the transmission shaft.

9. The grain processing drying equipment according to claim 8, characterized in that: A first spline is arranged at the upper end of the rotating shaft of the scraper, and the first spline is connected to the transmission shaft. A key slot is opened on the lower end of the rotating shaft of the scraper, and a second spline is arranged at the upper end of the rotating shaft of the dispersion disk, and the second spline is located in the key slot. The key slot and the first spline are staggered.

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

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