Automatic drying device and method for grain processing

Abstract

The present application relates to the technical field of dry processing, in particular to a kind of grain processing automatic drying device and method, including base, roller, adjusting unit and hot air unit.In the present application, the length of the grain is reduced in the accumulation area by the adjusting unit, which reduces the uniformity of the grain after being lifted, and the curtain formed by the second lifting plate in the middle drying area is uniform and at the maximum length, the grain is evenly dispersed for drying operation, thereby avoiding the problem of overheating of the grain caused by excessive lifting near the hot air area, and the inner and outer drying is formed by the hot air cylinder, air outlet sleeve and auxiliary heating ring in the hot air unit, and the heat transferred to the auxiliary heating ring after the roller is heated in the middle drying area ensures that the hot air still has the required heat for drying after flowing from right to left, improving the drying effect of the middle drying area (far from the hot air outlet area).

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dry processing, in particular to an automatic drying device and method for grain processing. BACKGROUND

[0002] In order to store safely, prevent mildew, maintain quality and extend storage time, it is necessary to dry the grain in the grain processing process to remove the moisture in the grain, such as seed grain, edible rice, corn, wheat and soybean.

[0003] At present, natural drying or mechanical ventilation drying is usually adopted, and in the mechanical ventilation drying, existing equipment such as a roller dryer, a tower dryer, a fluidized bed dryer and a batch circulating dryer is adopted for drying operation, and corresponding equipment is selected according to drying requirements, for example, roller dryers are adopted for drying operation for grain such as corn, sorghum and industrial grain which can tolerate mechanical tumbling and collision, and in the drying operation using the roller dryer, the grain to be dried is gradually put into the roller through the roller opening by manual operation, the air blower arranged at the other side of the roller blows hot air into the roller continuously, the grain is repeatedly scooped up and dropped by the lifting plate in the slowly rotating roller to contact the hot air for drying, and the grain is taken out from the roller opening after drying.

[0004] In the above existing drying process, the following problems exist: in the current roller drying process, the hot air is blown from one end of the roller to the opening end, so the temperature in the roller decreases from the closed end to the opening end, the material curtain formed by the grain lifted by the lifting plate of fixed angle in the drying process is the same, the grain close to the initial area of the hot air is prone to overheat and dry over and the grain far from the initial area of the hot air is prone to insufficient heating and poor drying effect, so the drying effect of the grain is uneven as a whole and it is difficult to meet the demand of uniform drying. SUMMARY

[0005] Therefore, it is necessary to provide an automatic drying device and method for grain processing to solve the above problems of the prior art.

[0006] The present application provides an automatic drying device for grain processing, which comprises a base, a roller rotatably arranged on the base, and a material control assembly arranged on the left side of the roller.

[0007] A hollow tube extending along the axis of the roller is arranged in the roller, and a stacking area, a middle drying area and a material control area are sequentially arranged in the roller from right to left, and adjusting units are arranged in the stacking area and the material control area, and the adjusting units comprise a plurality of lifting plates one distributed in the circumferential direction.

[0008] The middle drying area is fixedly provided with a plurality of groups of material lifting assemblies arranged equidistantly from left to right, and each material lifting assembly comprises a plurality of material lifting plates two circumferentially distributed and fixed to the roller, and tangents at the connection positions of the material lifting plates two and the roller are perpendicular to each other.

[0009] The roller is provided with a hot air unit for auxiliary drying, and the hot air unit comprises a hot air cylinder located at the right side of the roller and a plurality of air outlet sleeves distributed equidistantly left and right.

[0010] The middle drying area is provided with two auxiliary heating rings distributed left and right, and the auxiliary heating rings perform secondary heating on the hot air flowing back to the air outlet sleeves by using the heat transferred by the electric heating pipes.

[0011] The angle of the material lifting plate one is changed by means of the adjusting unit to control the length of the material curtain in the accumulation area, the material lifting plate two is used to form the maximum material curtain in the middle drying area, the hot air unit is used to form double heating drying inside and outside, and the auxiliary heating ring is used for auxiliary heating circulation to form the drying operation of external drying, internal maximum material lifting and circulating auxiliary heating in the middle drying area.

[0012] According to an advantageous embodiment, the adjusting unit further comprises a rotating sleeve, the hollow tube is provided with a rotating sleeve, the circumferential surface of the rotating sleeve is hingedly connected with a connecting frame corresponding to the adjacent material lifting plate one, the connecting frame is hingedly connected with the corresponding material lifting plate one, and the material lifting plate one is hingedly connected with the inner wall of the roller.

[0013] The hollow tube moves forward and backward to drive the rotating sleeve to move synchronously, change the angle between the tangent at the connection position of the material lifting plate one and the roller, and adapt to three operation states of rapid feeding, slow drying and rapid discharging.

[0014] According to an advantageous embodiment, a plurality of material leakage holes are formed through the material lifting plate two, and the material leakage holes are uniformly distributed on the surface of the material lifting plate two.

[0015] According to an advantageous embodiment, the hot air unit further comprises a flow dividing cylinder, the right end surface of the roller is fixedly provided with a flow dividing cylinder sleeved on the hollow tube, a communication groove one is formed in the hollow tube and communicates with the inner cavity of the flow dividing cylinder, and all the hot air cylinders are fixedly arranged on the flow dividing cylinder and penetrate into the inside of the roller.

[0016] According to an advantageous embodiment, all the air outlet sleeves are sleeved on the hollow tube and correspond to the material lifting assemblies one by one, a communication groove two is formed in the hollow tube and communicates with the inner cavity of the air outlet sleeve, and a plurality of air outlets are formed in the circumferential surface of the air outlet sleeve.

[0017] The hollow frame one is fixedly arranged between the air outlet sleeve and the inner wall of the roller, and a spoiler is fixedly arranged on the left and right sides of the hollow frame one.

[0018] According to an advantageous embodiment, the spoiler is in the shape of a broken line from top to bottom, the inside of the spoiler is a hollow structure and communicates with the cavity of the hollow frame one.

[0019] According to an advantageous embodiment, the auxiliary heating ring is fixedly arranged in the roller, and an annular cavity is formed in the auxiliary heating ring.

[0020] A communication groove three is formed in the hollow pipe corresponding to the hollow frame two, the hollow frame two cavity communicates with the hollow pipe cavity through the communication groove three, and a shunt block is fixedly arranged in the hollow pipe.

[0021] According to an advantageous embodiment, the inner arc surface of the auxiliary heating ring is provided with auxiliary heating ports, and the number of auxiliary heating ports on the auxiliary heating ring gradually increases from right to left.

[0022] According to an advantageous embodiment, the hot air cylinder, the air outlet and the auxiliary heating port are all provided with a matching shape of the anti-blocking net plate.

[0023] In addition, the application also provides an automatic drying method for grain processing, which comprises the following steps: S1, preheating the roller: heating the roller and the hot air blowing into the hollow pipe two operation modes to preheat the roller.

[0024] S2, put in grain: manually put the grain to be dried into the upper inlet of the material control assembly, adjust the lifting plate one to be in the feeding state through the adjusting unit, then slowly rotate the roller, the grain moves quickly from left to right, and the grain to be dried moves to the accumulation area.

[0025] S3, travel drying: adjust the lifting plate one through the adjusting unit to make the lifting curtain of the lifting plate one shorter, slowly reverse the roller to make the grain move slowly from right to left, uniformly dry the grain in the middle drying area, and maintain the temperature of the hot air in the middle drying area while auxiliary heating drying in the middle drying area by the auxiliary heating ring.

[0026] S4, cooling and stabilizing: stop heating after completing the drying operation, but the roller keeps rotating, so that the temperature of the grain decreases to close to the ambient temperature.

[0027] S5, discharge and collection: after confirming that the grain is cooled, adjust the angle of the lifting plate one through the adjusting unit to make the grain move quickly from right to left and fall out of the collection from the lower opening of the material control assembly.

[0028] In summary, the present application has the following beneficial effects: in the present application, the length of the grain raised curtain is reduced in the accumulation area by means of the adjusting unit, that is, the uniformity of the raised grain is reduced, and the curtain formed by the second raising plate in the middle drying area is uniform and at the maximum length, the grain is dispersed and uniformly dried, thereby avoiding the problem of overheating of the grain caused by excessive raising near the hot air area, and the inner and outer drying is formed by the hot air cylinder, the air outlet sleeve and the auxiliary heating ring in the hot air unit, and the heat transferred to the auxiliary heating ring from the heated roller in the middle drying area ensures that the hot air still has the required heat after flowing from right to left, thereby improving the drying effect of the middle drying area (far away from the hot air outlet area) on the grain. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the provided drawings.

[0030] Figure 1 A perspective structural schematic diagram of a grain processing automatic drying device according to an embodiment of the present application is shown.

[0031] Figure 2 A partial structural sectional perspective structural schematic diagram of a grain processing automatic drying device according to an embodiment of the present application is shown.

[0032] Figure 3 A partial sectional front view between the roller, the first raising plate and the second raising plate according to an embodiment of the present application is shown.

[0033] Figure 4 A partial sectional perspective structural schematic diagram between the hollow pipe, the auxiliary heating ring and the spoiler according to an embodiment of the present application is shown.

[0034] Figure 5 A partial sectional structural schematic diagram between the hollow pipe, the spoiler and the air outlet sleeve according to an embodiment of the present application is shown.

[0035] Figure 6 A partial sectional plan view between the auxiliary heating ring, the second hollow frame and the flow dividing block according to an embodiment of the present application is shown.

[0036] Figure 7 A schematic diagram of the flow of hot air from right to left between the hollow pipe, the second hollow frame and the auxiliary heating ring according to an embodiment of the present application is shown.

[0037] Figure 8Fig. 2 shows a perspective view of the right auxiliary heating ring and hollow frame II according to the embodiment of the present application.

[0038] Figure 9 Fig. 3 shows a perspective view of the left auxiliary heating ring and hollow frame II according to the embodiment of the present application.

[0039] The above-mentioned figures include the following reference signs: 1, base; 2, roller; 3, shell; 4, material control assembly; 5, hollow pipe; 60, accumulation zone; 61, middle drying zone; 62, material control zone; 7, adjusting unit; 70, material lifting plate I; 71, rotating sleeve; 710, connecting frame; 8, material lifting plate II; 80, material leakage hole; 9, hot air unit; 90, hot air cylinder; 91, air outlet sleeve; 92, auxiliary heating ring; 93, shunt cylinder; 94, communication groove I; 95, communication groove II; 950, air outlet; 951, hollow frame I; 952, spoiler; 96, hollow frame II; 960, communication groove III; 961, shunt block; 962, auxiliary heating port; 97, anti-blocking screen. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0041] As shown in Figure 1 , a grain processing automatic drying device includes a base 1, a roller 2 is rotatably arranged on the base 1, a shell 3 is installed on the roller 2, a plurality of electric heating pipes (not shown in the figure) are arranged on the inner arc surface of the shell 3 and surround the roller 2, a material control assembly 4 is arranged on the left side of the roller 2, and the roller 2 is driven to rotate by an external motor (not shown in the figure) through an existing transmission mode such as a gear drive mode.

[0042] As shown in Figure 1 , Figure 2 , and Figure 3 , a hollow pipe 5 extending along the axis from left to right is arranged in the roller 2, an accumulation zone 60, a middle drying zone 61 and a material control zone 62 are sequentially arranged in the roller 2 from right to left, adjusting units 7 are arranged in the accumulation zone 60 and the material control zone 62, the adjusting units 7 include a plurality of material lifting plates I 70 which are distributed in the circumferential direction and have adjustable inclination angles; the hollow pipe 5 is driven to move left and right by an external hydraulic cylinder (not shown in the figure), and the right end of the hollow pipe 5 is connected to an external existing hot air machine (not shown in the figure).

[0043] As shown in Figure 3 , the adjusting units 7 include a plurality of material lifting plates II 8 which are distributed in the circumferential direction and have adjustable inclination angles, the material lifting plates II 8 are arranged on the left side of the roller 2, the material lifting plates II 8 are driven to rotate by an external motor (not shown in the figure) through an existing transmission mode such as a gear drive mode, and the material lifting plates II 8 are arranged in the material control zone 62.As shown, a plurality of groups of material lifting assemblies are fixedly arranged in the middle drying area 61 from left to right at equal intervals, and the material lifting assemblies include a plurality of material lifting plates two 8 distributed in a circumferential direction and fixed to the roller 2, and tangents at the connection positions of the material lifting plates two 8 and the roller 2 are perpendicular to each other.

[0044] As shown in Figure 2 and Figure 3 The roller 2 is provided with a hot air unit 9 for auxiliary drying, and the hot air unit 9 includes a hot air cylinder 90 located on the right side of the roller 2 and a plurality of air outlet sleeves 91 located inside the roller 2 and distributed at equal intervals left and right.

[0045] As shown in Figure 3 The middle drying area 61 is provided with two auxiliary heating rings 92 distributed left and right, and the hot air in the hollow pipe 5 enters the auxiliary heating ring 92 from right to left and then flows back to the air outlet sleeve 91, and the auxiliary heating ring 92 uses the heat transferred by the electric heating pipe to perform secondary heating on the hot air.

[0046] In operation, first, the roller 2 is preheated by the heat generated after the electric heating pipe is powered on, and then the grain to be dried is manually fed into the roller 2 through the left opening of the roller 2 by means of the material control assembly 4, and at the same time, the external motor is operated to make the roller 2 rotate forward, and through the inclined features of the material lifting plate one 70 and the material lifting plate two 8, the grain moves from left to right and finally accumulates in the accumulation area 60, and then the heating temperature of the electric heating pipe is increased to the set temperature, and at the same time, the hot air is blown into the hollow pipe 5 by the existing hot air machine on the right side, and the external motor is operated to make the roller 2 slowly reverse, and the grain slowly moves from right to left.

[0047] In the above slow moving process of grain, the grain in the middle drying area 61 is lifted by the second lifting plate 8 to form a curtain, which is dried by the hot air blown in through the hot air cylinder 90 and the air outlet sleeve 91 and the heat transferred by the roller 2 itself. It needs to be pointed out that in the process of grain entering the roller 2 from left to right, the adjusting unit 7 adjusts the first lifting plate 70 so that the tangent angle at the connection between the first lifting plate 70 and the roller 2 is at a maximum, facilitating the rapid transportation of grain from left to right and improving the feeding efficiency. Secondly, after drying, the above-mentioned method is used for rapid unloading. When drying the grain, the tangent angle at the connection between the first lifting plate 70 and the roller 2 is at a minimum, reducing the lifting effect of the first lifting plate 70 on the grain and reducing the curtain formed by the lifting action in the accumulation area 60 and the control area 62. The temperature in the accumulation area 60 is the highest due to the large amount of hot air flowing out through the hot air cylinder 90 and the sealing at the right end. The above-mentioned method avoids the problem of overheating caused by the dispersion of grain in the accumulation area 60. In the control area 62, the problem of grain splashing caused by excessive lifting action is avoided. The tangent at the connection between the second lifting plate 8 and the roller 2 is perpendicular to each other, and the curtain formed by the lifting of the second lifting plate 8 is uniform, and the grain is uniformly dispersed, so the grain is uniformly dried in the middle drying area 61. At the same time, the auxiliary heating ring 92 is set to maintain the temperature of the hot air in the middle drying area 61 while auxiliary drying in the middle drying area 61, ensuring the drying effect of the middle drying area 61. After completing the drying operation, the grain is quickly moved from right to left by the external motor, and falls out of the opening below the control assembly 4 and is collected.

[0048] As shown in Figure 2 and Figure 3 The adjusting unit 7 also includes a rotating sleeve 71, which is rotatably sleeved on the hollow pipe 5. The circumferential surface of the rotating sleeve 71 is hingedly connected with a connecting frame 710 corresponding to the adjacent first lifting plate 70. The connecting frame 710 is hingedly connected with the corresponding first lifting plate 70, and the first lifting plate 70 is hingedly connected with the inner wall of the roller 2.

[0049] The forward and backward movement of the hollow pipe 5 drives the rotating sleeve 71 to move synchronously, changing the angle between the tangent at the connection between the first lifting plate 70 and the roller 2, adapting to the three operation states of rapid feeding, slow drying and rapid unloading.

[0050] In the initial state, the tangent line at the connection between the first lifting plate 70 and the inner wall of the roller 2 is perpendicular to each other, at this time, the included angle between them is the largest, the first lifting plate 70 and the second lifting plate 8 have the same maximum lifting effect, so the feeding and discharging operation of the grain is carried out in this state, and when the slow drying operation is carried out, the outer hydraulic cylinder works to make the hollow tube 5 move left, the hollow tube 5 drives the rotating sleeve 71 and the connecting frame 710 to move left synchronously, the connecting frame 710 pulls the corresponding first lifting plate 70 to move synchronously, so that the included angle between the tangent line at the connection between the first lifting plate 70 and the inner wall of the roller 2 is reduced, in this state, the grain curtain formed when the roller 2 drives the first lifting plate 70 to lift the grain is smaller than the grain curtain formed when the second lifting plate 8 lifts the grain, therefore, in the area close to the hot air cylinder 90 (the part with the highest temperature in the whole roller 2), the grain lifting curtain is short, and the whole is still in the accumulation state, thereby avoiding the problem of grain overheating and cracking or bursting in the high temperature area.

[0051] As shown in Figure 4 , a plurality of material leakage holes 80 are provided through the second lifting plate 8, and the material leakage holes 80 are uniformly distributed on the surface of the second lifting plate 8, part of the grain leaks out through the material leakage holes 80 when the second lifting plate 8 lifts the grain, and the lifting action forms a more uniform grain curtain.

[0052] As shown in Figure 2 and Figure 4 , the hot air unit 9 further comprises a flow dividing cylinder 93, the right end surface of the roller 2 is fixedly provided with the flow dividing cylinder 93 which is sleeved on the hollow tube 5, the hollow tube 5 is provided with a communication groove one 94 which communicates with the inner cavity of the flow dividing cylinder 93, and all the hot air cylinders 90 are fixedly arranged on the flow dividing cylinder 93 and penetrate into the inside of the roller 2.

[0053] When working, the hot air entering through the hollow tube 5 is pumped into the flow dividing cylinder 93 through the communication groove one 94, and then is pumped into the roller 2 by all the hot air cylinders 90, the hot air from right to left as the internal heat source for drying the grain inside, cooperates with the external heat source of the outer wall of the roller 2, and the grain is dried by internal and external double drying, thereby improving the drying efficiency.

[0054] As shown in Figure 3 and Figure 5 , all the air outlet sleeves 91 are sleeved on the hollow tube 5 and correspond to the lifting assembly one, the hollow tube 5 is provided with a communication groove two 95 which communicates with the inner cavity of the air outlet sleeve 91, and the circumferential surface of the air outlet sleeve 91 is provided with a plurality of circumferentially distributed air outlets 950.

[0055] The air outlet sleeve 91 and the inner wall of the roller 2 are fixedly provided with a hollow frame one 951, and the left and right sides of the hollow frame one 951 are fixedly provided with baffles 952.

[0056] As shown in Figure 5As shown, in order to increase the contact area of the food and the spoiler 952, the spoiler 952 is a broken line from top to bottom, the spoiler 952 is a hollow structure and communicates with the hollow frame 951.

[0057] When working, in the process of driving the second lifting plate 8 to lift and dry the food, the second lifting plate 8 pushes the food to move synchronously in the vertical state. In the whole process from the vertical state to the inclined state, and then gradually from the inclined state to the horizontal state and from the horizontal state to the inclined state, most of the food on the second lifting plate 8 slides off the second lifting plate 8 under the action of gravity and forms a parabolic material curtain, and a small part of the food falls out through the leakage hole 80 under the action of gravity in the above process, so as to uniformly lift the food in all directions, make the food uniformly leak in the middle drying area 61, and ensure uniform heating, thereby improving the uniformity of drying the food. It needs to be pointed out that: because the single lifting action of the second lifting plate 8 cannot meet the dispersion demand of a large amount of food at the same time, the leakage hole 80 can provide part of the dispersion drying demand of the food.

[0058] Secondly, in the process of the second lifting plate 8 following the rotation of the roller 2 to lift the food, the hollow frame 951 and the spoiler 952 are synchronously rotated by the roller 2. In the process of the food forming a material curtain and falling, the spoiler 952 hinders the original moving path of the food, so that the food changes the moving direction after contacting the spoiler 952 after being lifted, increases the randomness of the moving process of the food, improves the uniformity of drying the food, and part of the hot air passing through the hollow pipe 5 enters the air outlet sleeve 91 through the communication groove 95, is sprayed into the inside of the roller 2 through the air outlet 950, and a plurality of equidistantly distributed drying heat source points are arranged in the area away from the hot air cylinder 90 through a plurality of air outlets 950. Avoid the problem that the food is not dried uniformly because the food is far away from the hot air cylinder 90, the heat of the hot air is lost, or the hot air is difficult to reach. At the same time, the hollow feature of the hollow frame 951 and the broken line surface of the spoiler 952 enable the food to fully contact the surface of the spoiler 952, so that heat is transmitted to the food in the form of direct contact while the food is disturbed, thereby improving the drying effect and efficiency.

[0059] As shown in Figure 4 , Figure 6 and Figure 7 , the auxiliary heating ring 92 is fixedly arranged in the roller 2, and a ring-shaped cavity is formed in the auxiliary heating ring 92. The hollow pipe 5 is slidably provided with two hollow frames 96 which are symmetrical in front and back and in T shape.

[0060] The hollow pipe 5 is provided with a communication groove three 960 corresponding to the hollow frame two 96. The inner cavity of the hollow frame two 96 communicates with the inner cavity of the hollow pipe 5 through the communication groove three 960. The hollow pipe 5 is fixedly provided with a flow dividing block 961. The flow dividing block 961 is located between the two hollow frame two 96. The hot air from the right side enters the auxiliary heating ring 92 from the front hollow frame two 96 and flows out from the rear hollow frame two 96.

[0061] As shown in Figure 8 and Figure 9 , the inner arc surface of the auxiliary heating ring 92 is provided with an auxiliary heating port 962. The number of auxiliary heating ports 962 on the auxiliary heating ring 92 from right to left gradually increases.

[0062] In operation, the hot air entering the hollow pipe 5 enters the front hollow frame two 96 through the right side first front communication groove three 960, and is divided into two paths in the auxiliary heating ring 92. Finally, the hot air is merged at the rear side of the auxiliary heating ring 92 and enters the rear hollow frame two 96, and then flows back to the hollow pipe 5 through the right side first rear communication groove three 960. At the same time, part of the heat is transferred to the auxiliary heating ring 92 through the inner wall of the drum 2 heated by the electric heating pipe. The auxiliary heating ring 92 transfers heat to the hot air flowing in it, ensuring that the hot air still has the required heat after flowing from right to left. Therefore, the heat preservation effect is achieved through the transfer of multiple auxiliary heating rings 92. The auxiliary heating ports 962 also have the effect of maintaining the drying temperature inside the drum 2. In summary, the drying capacity of the grain in the middle drying area 61 and the left area of the drum 2 meets the demand, avoiding the problem of excessive heat loss due to the open end of the drum 2 and the open setting of the drum 2, which affects the drying effect of the grain. It needs to be additionally pointed out that because the hot air is continuously transported from right to left, although it is assisted and heat preserved by the auxiliary heating ring 92 in the middle process, the temperature of the hot air blown out through the auxiliary heating port 962 is not enough to cause excessive drying of the grain. Therefore, the middle drying area 61 (far away from the area of the large hot air outlet, i.e. the accumulation area 60) is the most suitable area for drying operation in the drum 2, which ensures the drying effect while avoiding excessive drying.

[0063] It needs to be additionally pointed out that during the left and right movement of the hollow pipe 5, the corresponding communication groove one 94 is still in the inner cavity of the flow dividing cylinder 93, the communication groove two 95 is still in the inner cavity of the air outlet sleeve 91, and the communication groove three 960 is still in the coverage area of the horizontal section of the hollow frame two 96. Therefore, the left and right movement of the hollow pipe 5 will not interfere with the set flow process of the hot air between the hollow pipe 5, the flow dividing cylinder 93, the air outlet sleeve 91 and the hollow frame two 96.

[0064] As shown in Figure 4 and Figure 5 , in order to prevent blockage, the hot air duct 90, the air outlet 950 and the auxiliary heating port 962 are all provided with a blocking net plate 97 with a matching shape.

[0065] It needs to be additionally pointed out that in the present application, the adjusting unit 7 and the hot air unit 9 are added to the existing drum drying technology, wherein the adjusting unit 7 changes the size of the material curtain formed by the material lifting action in the accumulation area 60, avoids the problem of overheating caused by reducing the size of the material curtain formed by the grain material lifting in the accumulation area 60 which is the highest temperature area inside the drum 2, and at the same time, the material lifting curtain of the material lifting plate two 8 in the middle drying area 61 is in the longest state, the drying uniformity and drying effect of the grain in this area are improved, the inside and outside drying operations are formed by the hot air unit 9 and the external heat source of the drum 2 being in line, and at the same time, the heat transferred from the heated drum 2 to the auxiliary heating ring 92 ensures that the hot air still has the required heat after flowing from right to left, and ensures that the drying temperature in the area from right to left in the drum 2 will not be insufficient to affect the drying effect due to the long conveying distance. Compared with the fixed material lifting action technical solution in the prior art, the problem of over-drying is avoided, and the parts are all conventional existing technical parts, which can be used continuously after single installation, so the economic benefits brought by the above-mentioned technical problems are negligible. The above-mentioned increased conventional parts, in summary, the technical solution is a specific improvement based on the existing technical condition and solving the technical problem.

[0066] In addition, the present application also provides an automatic drying method for grain processing, which comprises the following steps: S1, preheating the drum 2: the heat generated by the electric heating pipe after being electrified and the hot air blown into the hollow pipe 5 by the existing external hot air machine are used to preheat the drum 2.

[0067] S2, feeding grain: the existing conveying equipment is used to send the grain to be dried into the upper inlet of the material control assembly 4, the material lifting plate one 70 is adjusted to be in the feeding state by the adjusting unit 7, then the drum 2 is slowly rotated by the external motor, the grain moves quickly from left to right, and the grain to be dried moves into the accumulation area 60.

[0068] S3, drying in motion: the material lifting curtain of the material lifting plate one 70 is shortened by adjusting the material lifting plate one 70 by the adjusting unit 7, the drum 2 is slowly reversed by the external motor, the grain moves slowly from right to left, in the middle drying area 61, the grain is uniformly dried by the hot air blown out by the hot air cylinder 90 and the heat generated by the electric heating pipe while the material lifting plate two 8 is lifting, and at the same time, the temperature of the hot air in the middle drying area 61 is maintained by the auxiliary heating ring 92 set in the middle drying area 61, so as to ensure the drying effect of the middle drying area 61.

[0069] S4, cooling and stabilizing: after the drying operation is completed, the heating is stopped, but the drum 2 is maintained to rotate, so that the temperature of the grain is reduced to close to the ambient temperature.

[0070] S5, the grain collection: after confirming that the grain is cooled, the grain is quickly moved from right to left by adjusting the angle of the grain lifting plate 70 through the adjusting unit 7 and falling from the opening below the control component 4 to be collected.

[0071] In the description of the present application, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the devices or elements indicated must have a specific orientation or be constructed and operated in a specific orientation, therefore cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0072] In addition, the terms "first", "second", "one", "two" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "one", "two" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0073] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected", "mounted", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0074] The embodiments of the specific implementation are the preferred embodiments of the present application, which do not limit the protection scope of the present application, so that any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An automatic grain drying device, characterized in that, include: A base, on which a roller is rotatably mounted, and a shell is installed on the roller. Multiple electric heating tubes are arranged around the roller on the inner arc surface of the shell. A material control component is arranged on the left side of the roller. The drum is equipped with a hollow tube. From right to left, the drum is equipped with a stacking area, a central drying area and a material control area. An adjustment unit is provided in both the stacking area and the material control area. The adjustment unit includes multiple lifting plates. The central drying zone is equipped with multiple sets of lifting assemblies arranged equidistantly from left to right. Each lifting assembly includes multiple circumferentially distributed lifting plates fixed to the drum. The tangents at the connection between the lifting plates and the drum are perpendicular to each other. The drum is equipped with a hot air unit for auxiliary drying. The hot air unit includes a hot air duct located on the right side of the drum and multiple air outlet sleeves. The central drying zone is equipped with two auxiliary heating rings distributed on the left and right. The auxiliary heating rings use the heat transferred by the electric heating tube to reheat the hot air flowing back to the air outlet sleeve. The angle of the first lifting plate is changed by the adjustment unit to control the length of the lifting curtain in the stacking area. The second lifting plate forms the maximum lifting curtain for uniform drying. The hot air unit forms double drying inside and outside, and the auxiliary heating ring is circulated for auxiliary heating. In the middle drying area, the drying operation is formed by external drying, maximum internal lifting and circulating auxiliary heating. The adjustment unit also includes a rotating sleeve, which is rotatably mounted on the hollow tube. The circumferential surface of the rotating sleeve is ball-hinged with a connecting frame corresponding to an adjacent lifting plate. The connecting frame is hinged to the corresponding lifting plate, and the lifting plate is hinged to the inner wall of the drum. The hollow tube moves back and forth, driving the rotating sleeve to move synchronously, changing the angle between the tangent at the connection between the lifting plate and the drum, adapting to three operating states: rapid feeding, slow drying, and rapid discharging. All the aforementioned air outlet sleeves are fitted onto the hollow tube and correspond one-to-one with the material lifting assembly. The hollow tube has a connecting groove 2 that communicates with the inner cavity of the air outlet sleeve. The circumferential surface of the air outlet sleeve has multiple circumferentially distributed air outlets. A hollow frame is fixedly installed between the air outlet sleeve and the inner wall of the drum, and baffles are fixedly installed on both the left and right sides of the hollow frame. The auxiliary heating ring is fixedly installed inside the drum and an annular cavity is opened inside the auxiliary heating ring. Two hollow frames that are symmetrical and T-shaped are slidably installed on the hollow tube. The hollow tube has a connecting groove three corresponding to the hollow frame two. The inner cavity of the hollow frame two is connected to the inner cavity of the hollow tube through the connecting groove three. A flow divider is fixedly installed inside the hollow tube. The flow divider is located between the two hollow frames two, so that the hot air entering from the right side enters the auxiliary heating ring from the front hollow frame two and flows out from the rear hollow frame two.

2. The automatic grain drying device according to claim 1, characterized in that: The second lifting plate has multiple material leakage holes that are evenly distributed on its surface.

3. The automatic grain drying device according to claim 1, characterized in that: The hot air unit also includes a distribution cylinder. A distribution cylinder is fixedly installed on the right end face of the drum and sleeved on the hollow tube. A connecting groove is opened on the hollow tube to communicate with the inner cavity of the distribution cylinder. All hot air cylinders are fixedly installed on the distribution cylinder and penetrate into the inside of the drum.

4. The automatic grain drying device according to claim 3, characterized in that: The spoiler is zigzag-shaped from top to bottom, and the interior of the spoiler is a cavity structure that is connected to a cavity in the hollow frame.

5. An automatic grain drying device according to claim 4, characterized in that: The auxiliary heating ring has auxiliary heating ports on its inner arc surface, and the number of auxiliary heating ports on the auxiliary heating ring gradually increases from right to left.

6. The automatic grain drying device according to claim 5, characterized in that: The hot air duct, air outlet, and auxiliary heating port are all equipped with anti-clogging mesh plates of a matching shape.

7. An automatic grain drying method, comprising an automatic grain drying device according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Preheating drum: The drum is preheated by two methods: heating the drum and blowing hot air into the hollow tube; S2. Feeding grain: The grain to be dried is fed into the upper inlet of the material control component. The lifting plate is adjusted to the feeding state by the adjustment unit, and then the grain to be dried moves quickly into the stacking area. S3. Moving Drying: Adjust the lifting plate one by adjusting the unit to shorten the lifting curtain of the lifting plate one, so that the grain is dried evenly in the middle drying zone. At the same time, the auxiliary heating ring is used to carry out auxiliary heating drying in the middle drying zone while maintaining the temperature of the hot air in the middle drying zone. S4. Cooling Stability: After the drying process is completed, heating is stopped, but the drum continues to rotate, so that the grain temperature drops to the ambient temperature. S5. Grain collection: After confirming that the grain has cooled down, adjust the angle of the lifting plate by adjusting the unit so that the grain moves quickly from right to left and falls out from the lower opening of the control component for collection.

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