High-efficiency quality-keeping grain drying system

Abstract

The application discloses a high-efficiency quality-keeping grain drying system, and relates to the technical field of grain drying equipment, which has the advantages of reducing the burst rate and crack rate of grain kernels in the quenching process, and the technical scheme is as follows: a drying machine body is sequentially provided with a grain storage section, an upper drying part, a middle drying part, a lower cooling section and a grain discharging section from top to bottom, and a discharging port is arranged at the lower end of the grain discharging section; each of the upper drying part and the middle drying part comprises a drying section and a recovery section, the length of each drying section of the upper drying part is longer than that of each drying section of the middle drying part, the length of each recovery section of the upper drying part is shorter than that of each recovery section of the middle drying part, the lowermost recovery section of the middle drying part is in communication with the lower cooling section, the lower cooling section is provided with an upper cooling section and a lower cooling section, and a ventilation part for guiding external air to the lower cooling section is arranged in the rear air chamber, and the external air enters the lower cooling section first and then enters the upper cooling section.

Description

Technical Field

[0001] This invention relates to the field of grain drying equipment technology, specifically a high-efficiency, quality-preserving grain drying system. Background Technology

[0002] my country's existing grain drying equipment mainly uses hot air drying. The grain enters the drying tower from the top, and hot air is circulated into the drying tower to dry the wet grain.

[0003] Chinese Patent No. CN202232776U discloses a grain drying tower, including a tower body and a hot air furnace connected to the tower body via a hot air duct. A grain discharge valve is provided at the bottom of the tower body. The tower body is provided with a first drying section, a first tempering section, a second drying section, a second tempering section, a third drying section, a third tempering section, a fourth drying section, a fourth tempering section, a fifth drying section, a fifth tempering section, a sixth drying section, a sixth tempering section, and a cooling section arranged sequentially from top to bottom. The grain discharge valve is located below the cooling section. An angular air box is provided in each drying section and the cooling section. The angular air box is connected to the hot air duct. The cooling section is connected to the cold air fan via a cold air duct. A grain preheating section is also provided above the first drying section.

[0004] In the aforementioned prior art, the cooling section is connected to the air cooler via a cold air duct, allowing the cold air from the air cooler to blow directly onto the cooling section. At this time, the grain flowing down from the sixth tempering section is already heated, which causes the grain grains to cool down suddenly, resulting in an increase in the rate of grain bursting and cracking. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a high-efficiency, quality-preserving grain drying system that reduces the rate of grain cracking and breakage due to sudden cooling.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This invention provides a high-efficiency, quality-preserving grain drying system, including a dryer body and a front air chamber and a rear air chamber respectively connected to the dryer body and located on both sides of the dryer body. The front air chamber is equipped with a heating device, and the rear air chamber is connected to a dust removal device. The dryer body is arranged from top to bottom as follows: a grain storage section, an upper drying component, a middle drying component, a lower cooling section, and a grain discharge section.

[0008] The dryer body has a feed inlet at the upper end of the grain storage section and a discharge outlet at the lower end of the discharge section;

[0009] The upper drying part and the middle drying part each comprise drying sections and recovery sections, the length of each drying section of the upper drying part is longer than the length of each drying section in the middle drying part, the length of each recovery section in the upper drying part is less than the length of each recovery section in the middle drying part, the lowermost recovery section in the middle drying part is in communication with a lower cooling section, the lower cooling section is provided with an upper cooling section and a lower cooling section, a ventilation member is arranged in the rear air chamber to ventilate external air to the lower cooling section, the external air first enters the lower cooling section and then enters the upper cooling section, the lower cooling section is in communication with a discharge section, and the grain is discharged from the discharge section to the main body of the dryer.

[0010] By adopting the above technical scheme, the grain enters the storage section through the feeding port, and enters the drying sections and the recovery sections in the upper drying part which is in communication with the lower part of the storage section, the drying sections and the recovery sections are arranged in multiple sections from top to bottom and are in communication with each other, hot air enters and exits each drying section, and there is no hot air entering and exiting the recovery sections, the lowermost recovery section in the middle drying part is in communication with the cooling section, the cooling section is provided with an upper cooling section and a lower cooling section, and external natural air first enters the lower cooling section and then enters the upper cooling section; the lower cooling section is in communication with the discharge section, and the grain is uniformly discharged from the discharge section, gathered in the lower discharge port, and then discharged from the main body of the dryer, at this time, the external natural air entering the main body of the dryer is not directly in contact with the high-temperature cooled grain, but first passes through the lower cooling section and then enters the upper cooling section, at this time, the lower cooling section of the main body of the dryer adopts a segmented gradient cooling process, which reduces the increase of the burst rate and the crack rate of the grain kernels due to sudden cooling after being heated; the length of each drying section of the upper drying part is longer than the length of each drying section in the middle drying part, which is beneficial to the rapid evaporation and discharge of free moisture in the grain and improves the drying efficiency, and the length of each recovery section in the upper drying part is less than the length of each recovery section in the middle drying part, which is beneficial to the transfer of internal and external moisture in the grain kernels and the balance of the temperature gradient in the later drying stage, and ensures the drying quality.

[0011] Preferably, the drying sections and the recovery sections are guide pipes with a triangular longitudinal section, the guide pipes are connected with the inner wall of the dryer main body, each guide pipe at the same layer in the dryer main body is distributed in intervals, each guide pipe at the upper and lower layers in the dryer main body is distributed in a staggered manner, the guide pipe at the upper layer is directly opposite the space between the two guide pipes at the lower layer, the lower end surface of each guide pipe is open, one end of the guide pipe at the drying section at one layer is in communication with the front air chamber, one end of the guide pipe at the layer below is in communication with the rear air chamber, and one end of each guide pipe in the recovery section is in communication with the rear air chamber.

[0012] Preferably, the rear plenum top is provided with a first air extractor for extracting air from the rear plenum top, the lower part of the rear plenum is communicated with a waste gas outlet pipe, the dust removal device comprises a plurality of parallelly arranged cyclone dust collectors communicated with the waste gas outlet pipe, the air inlet of each cyclone dust collector is communicated with the waste gas outlet pipe, the air outlet of each cyclone dust collector is communicated through a communication pipe, the end of the communication pipe away from the cyclone dust collector is communicated with a second air extractor, and the air outlet of the second air extractor is communicated with an air path pipe.

[0013] Preferably, the heating device is arranged at the bottom of the front plenum, the outer side of the bottom of the front plenum is provided with a louvered air inlet, the front plenum is designed as a variable cross-section structure from bottom to top, that is, the cross-sectional area decreases from bottom to top, the inner wall of the bottom of the front plenum is provided with a vertical first air guide plate, the upper end of the first air guide plate extends to the lower end of the uppermost drying section of the middle drying member, the front plenum is provided with a flip gate at a position corresponding to the slow recovery section of the lowermost part of the upper drying member, which closes the air in the front plenum from moving upward, the rear plenum is provided with an extension plate extending downward at a position corresponding to the upper part of the middle drying member, the extension plate extends away from the drying machine body, and the extension plate is provided with a vertical second air guide plate extending downward at an end away from the drying machine body, the lower end of the second air guide plate is located above the lowermost drying section of the middle drying machine.

[0014] Preferably, the flip gate comprises a rotating shaft rotatably connected between the opposite side walls of the front plenum, the two rotating shafts are each provided with a closing plate, the two rotating shafts are distributed close to the side walls of the front plenum, when the two closing plates are rotated to a horizontal position, the hot air is blocked from flowing upward along the front plenum, and the front plenum is provided with a driving member for driving the rotation of the two closing plates.

[0015] Preferably, the driving member comprises a connecting block arranged at the lower end face of the two closing plates, the lower end of each connecting block is rotatably connected with a first swing rod, the inner wall of the front plenum is rotatably connected with a swing block, the swing block is provided with two swing blocks and is distributed close to the first swing rod, the end of the first swing rod away from the connecting block is hingedly connected to the swing block, the inner wall of the front plenum is rotatably connected with a driving plate between the two swing blocks, the two ends of the driving plate are rotatably connected with second swing rods, the point at which the driving plate is rotatably connected with the inner wall of the front plenum is between the points at which the two second swing rods are rotatably connected with the driving plate, the second swing rods at the upper and lower ends of the driving plate are hingedly connected to the two swing blocks away from the driving plate, and the outer wall of the front plenum is provided with a motor for driving the rotation of the driving plate.

[0016] Preferably, one of the closing plates is provided with a first inclined plate extending downward and inclined toward the direction of the rotating shaft connected with the closing plate, the other closing plate is provided with a second inclined plate cooperating with the first inclined plate and located below the first inclined plate, and the second swing rod driving the rotation of the closing plate with the first inclined plate is located above the other second swing rod.

[0017] Preferably, the front air chamber is provided with a horizontal first air baffle at the upper end of the side of the first air deflector facing the dryer body, the first air baffle forms a single cavity outside the upper cooling section and the lower cooling section, the rear air chamber is provided with a second air baffle at the position corresponding to the lower cooling section, one end of the second air baffle is connected with the outer wall of the dryer body, the other end is connected with the inner wall of the bottom of the rear air chamber, the second air baffle forms a single cavity outside the lower cooling section, and the rear air chamber is provided with a plurality of air inlet butterfly valves on the bottom between the second air baffle and the dryer body.

[0018] Preferably, the grain discharging section comprises a plurality of groups of grain discharging mechanisms, each group of grain discharging mechanisms comprises a grain discharging wheel rotatably connected to the opposite inner wall of the dryer body, a sprocket provided at one end of the grain discharging wheel extending out of the outer wall of the dryer body, an upper guide plate and a lower guide plate provided on the inner wall of the dryer body and located on both sides of the grain discharging wheel, the outer wall of the grain discharging wheel is provided with a plurality of blades distributed along the length direction of the grain discharging wheel, there is a gap between the upper guide plate, the lower guide plate and the blades, the lower end of the upper guide plate is located above the grain discharging wheel, the lower end of the lower guide plate is located below the grain discharging wheel, the two upper guide plates of adjacent two grain discharging wheels are connected to each other when they face each other, the lower guide plates of adjacent two grain discharging wheels are connected to each other when they face each other, each sprocket is connected through an annular chain, and the outer wall of the dryer body is provided with a first motor for driving one of the sprockets to rotate.

[0019] Preferably, the lower end of each upper guide plate is hingedly connected with a movable flap, there is a gap between each movable flap and the grain discharging wheel, the inner wall of the dryer body is provided with a power member for driving the movable flaps above adjacent two grain discharging wheels to rotate simultaneously, the power member comprises a rotating disc rotatably connected to the opposite inner wall of the dryer body, the rotating disc is located between the adjacent two grain discharging wheels and between the two movable flaps, the axis of the rotating disc is parallel to the axis of each grain discharging wheel, and two opposite driving rods are hingedly connected to the disc surface of the rotating disc, one end of each driving rod away from the rotating disc is hingedly connected to the side wall of each movable flap, and the hingedly connected points of the two driving rods and the disc surface of the rotating disc are located on both sides of the vertical line of the center of the rotating disc and are distributed in staggered positions in height, and the outer wall of the dryer body is provided with a second motor for driving the rotating disc to rotate.

[0020] The beneficial effects of the present application are that: the grain enters the storage section from the feed port, and the drying section and the recovery section in the upper drying part communicated with the lower part of the storage section, the drying section and the recovery section are arranged in multiple sections from top to bottom and communicated with each other, hot air enters and exits each drying section, and there is no hot air entering and exiting the recovery section, the recovery section in the lowermost layer of the middle drying part is communicated with the cooling section, the cooling section is provided with an upper cooling section and a lower cooling section, and the external natural air first enters the lower cooling section and then enters the upper cooling section; the lower cooling section is communicated with the grain discharging section, the grain is uniformly discharged from the grain discharging section and collected into the lower discharge port, and then discharged from the main body of the dryer, at this time, the external natural air entering the main body of the dryer is not directly in contact with the high-temperature cooled grain, but first passes through the lower cooling section and then enters the upper cooling section, at this time, the lower cooling section of the main body of the dryer adopts a segmented gradient cooling process, which reduces the increase of the burst rate and crack rate of the grain kernels after being heated and rapidly cooled; the length of each drying section of the upper drying part is longer than that of each drying section in the middle drying part, which is beneficial to the rapid evaporation and discharge of free moisture in the grain and improves the drying efficiency, and the length of each recovery section in the upper drying part is less than that of each recovery section in the middle drying part, which is beneficial to the transfer of internal and external moisture in the grain kernels and the balance of temperature gradient in the later drying stage, and ensures the quality after drying. BRIEF DESCRIPTION OF DRAWINGS

[0021] 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 only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 It is an appearance structure schematic diagram of the high-efficiency quality-preserving grain drying system of the present embodiment.

[0023] Figure 2 It is a structure schematic diagram for embodying the internal airflow of the high-efficiency quality-preserving grain drying system of the present embodiment.

[0024] Figure 3 It is a structure schematic diagram for embodying the drying section and the recovery section of the present embodiment.

[0025] Figure 4 It is a structure schematic diagram for embodying the chain wheel of the present embodiment.

[0026] Figure 5 It is a structure schematic diagram for embodying the sealing plate of the present embodiment.

[0027] Figure 6 It is a structure schematic diagram for embodying the grain discharging section of the present embodiment.

[0028] Marked for explanation:

[0029] In the figure: 1, drying machine main body; 11, front air chamber; 111, heating device; 112, louvered air inlet; 113, first air guide plate; 114, turnover gate; 115, pivot; 116, closing plate; 1161, connecting block; 1162, first swing rod; 1163, swing block; 1164, driving plate; 1165, second swing rod; 1166, first inclined plate; 1167, second inclined plate; 117, first air baffle; 118, second air baffle; 12, rear air chamber; 121, first air extractor; 122, exhaust gas outlet pipe; 123, cyclone dust collector; 124, communication pipe; 125, second air extractor; 126, air path pipe; 127, extension plate; 128, second air guide plate; 129, air inlet butterfly valve; 13, dust removal device; 14, grain storage section; 141, feed inlet; 15, upper drying part; 151, drying section; 152, relaxation section; 16, middle drying part; 17, lower cooling section; 171, upper cooling section; 172, lower cooling section; 18, grain discharge section; 181, discharge port; 182, grain discharge wheel; 183, sprocket; 184, upper guide vane; 185, lower guide vane; 186, blade; 187, movable flap; 188, rotating disc; 1881, driving rod; 19, material guide pipe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] A high-efficiency quality-maintaining grain drying system, such as Figure 1 and Figure 2 , comprises a drying machine main body 1, a front air chamber 11 and a rear air chamber 12 which are respectively communicated with the drying machine main body 1 and are respectively located on both sides of the drying machine main body 1, the front air chamber 11 and the rear air chamber 12 are not provided with side walls on the side close to the drying machine main body 1, that is, the side walls of the drying machine main body 1 serve as the side walls of the front air chamber 11 and the rear air chamber 12, the front air chamber 11 is provided with a heating device 111, the rear air chamber 12 is communicated with a dust removal device 13, and the drying machine main body 1 is sequentially provided from top to bottom with a grain storage section 14, an upper drying part 15, a middle drying part 16, a lower cooling section 17 and a grain discharge section 18; the drying machine main body 1 is a hollow cuboid supported by a plurality of support columns from the ground.

[0032] such as Figure 1 and Figure 2The main body 1 of the dryer is provided with a feeding port 141 at the upper end of the grain storage section 14 and a hopper-shaped discharging port 181 at the lower end of the discharging section 18.

[0033] As Figure 1 and Figure 2 and Figure 3 The upper drying part 15 and the middle drying part 16 each include drying sections 151 and recovery sections 152, the length of each drying section 151 of the upper drying part 15 is longer than that of each drying section 151 of the middle drying part 16, the length of each recovery section 152 of the upper drying part 15 is shorter than that of each recovery section 152 of the middle drying part 16, the lowermost recovery section 152 of the middle drying part 16 is communicated with the lower cooling section 17, the drying section 151 of the upper drying part 15 and the middle drying part 16 is below the recovery section 152, and the recovery section 152 is below the drying section 151, which is in turn circulated, the lower cooling section 17 is provided with an upper cooling section 171 and a lower cooling section 172, the rear air chamber 12 is provided with a ventilation part for passing external air to the lower cooling section 17, the external air first enters the lower cooling section 172 and then enters the upper cooling section 171, the lower cooling section 172 is communicated with the discharging section 18, and the grain is discharged from the discharging section 18 to the main body 1 of the dryer.

[0034] As Figure 1 and Figure 2 The grain enters the grain storage section 14 through the feeding port 141 and enters the drying sections 151 and the recovery sections 152 in the upper drying part 15 communicated with the lower part of the grain storage section 14, the drying sections 151 and the recovery sections 152 are provided in multiple sections from top to bottom and communicated with each other, hot air enters and exits each drying section 151, and no hot air enters and exits each recovery section 152, the lowermost recovery section 152 of the middle drying part 16 is communicated with the cooling section, the cooling section is provided with an upper cooling section 171 and a lower cooling section 172, and external natural air first enters the lower cooling section 172 and then enters the upper cooling section 171; the lower cooling section is communicated with the discharging section 18, and the grain is uniformly discharged from the discharging section 18, collected in the lower discharging port 181, and then discharged from the main body 1 of the dryer, at this time, the external natural air entering the main body 1 of the dryer is not directly in contact with the high-temperature cooled grain, but first passes through the lower cooling section 172 and then enters the upper cooling section 171, at this time, the lower cooling section 17 of the main body 1 of the dryer adopts a segmented gradient cooling process to reduce the increase of the burst rate and the crack rate of the grain kernels after being heated and rapidly cooled; the length of each drying section 151 of the upper drying part 15 is longer than that of each drying section 151 of the middle drying part 16, which is beneficial to the rapid evaporation and discharge of free moisture in the grain and improves the drying efficiency, and the length of each recovery section 152 of the upper drying part 15 is shorter than that of each recovery section 152 of the middle drying part 16, which is beneficial to the transfer of internal and external moisture in the grain kernels and the balance of the temperature gradient in the later drying stage to ensure the quality after drying.

[0035] As Figure 2 And Figure 3 The drying section 151 and the recovery section 152 are all guide pipes 19 with a longitudinal cross-section in the shape of a triangle, and are connected to the inner wall of the dryer main body. The guide pipes 19 in the same layer of the dryer main body are distributed at intervals, and the guide pipes 19 in the upper and lower layers of the dryer main body are distributed in a staggered manner. The guide pipes 19 in the upper layer are directly opposite the space between the two guide pipes 19 in the lower layer. The lower end surface of each guide pipe 19 is open, and one end of the guide pipes 19 in one layer in the drying section 151 is in communication with the front air chamber 11, and one end of the guide pipes 19 in the layer below is in communication with the rear air chamber 12. The guide pipes 19 that are in communication with the front air chamber 11 and the rear air chamber 12 facilitate the drying of the grain between the lower guide pipes 19, and the upward blowing force of the hot air generated by the water vapor and dust in the grain facilitates the movement of the water vapor and dust along the guide pipes 19 that are in communication with the rear air chamber 12 to the rear air chamber 12 for treatment. At this time, the air in the front air chamber 11 is hot air generated by the heating device 111, and the hot air is then transported into the dryer main body through the guide pipes 19 in the drying section 151. At this time, the guide pipes 19 are all heating pipes, which dry and heat the grain. One end of each guide pipe 19 in the recovery section 152 is in communication with the rear air chamber 12. At this time, the guide pipes 19 that are in communication with the rear air chamber 12 guide the dust and shell floating in the space of the dryer main body to the rear air chamber 12, which is then subjected to dust removal treatment by the dust removal device 13 and finally discharged.

[0036] As Figure 2 And Figure 3 At this time, the length of each drying section 151 of the upper drying member 15 is longer than the length of each drying section 151 of the middle drying member 16, which means that the number of guide pipes 19 in each drying section 151 of the upper drying member 15 is greater than the number of guide pipes 19 in each drying section 151 of the middle drying member 16. The length of each recovery section 152 of the upper drying member 15 is less than the length of each recovery section 152 of the middle drying member 16, which means that the number of guide pipes 19 in each recovery section 152 of the upper drying member is less than the number of guide pipes 19 in each recovery section 152 of the middle drying member 16.

[0037] As Figure 2 And Figure 3 At this time, when the grain flows on the guide pipes 19 in the upper drying member 15 and the middle drying member 16, the grain flows in an S shape downward in the ventilation layer, which facilitates the full contact between the grain and the drying medium and ensures the uniformity of the grain moisture reduction.

[0038] As Figure 2 And Figure 3The material guiding pipe 19 can be installed in the storage section 14, but the two ends of the material guiding pipe 19 in the storage section 14 are not communicated with the front air chamber 11 or the rear air chamber 12, and only play a role of guiding material.

[0039] As Figure 2 The top of the rear air chamber 12 is provided with a first air extractor 121 for extracting air in the top of the rear air chamber 12, at this time, the first air extractor 121 collects the air entering the upper drying section 151 into the upper part of the rear air chamber 12 and leads out, the lower part of the rear air chamber 12 is communicated with a waste gas outlet pipe 122, the end of the waste gas outlet pipe 122 far away from the rear air chamber 12 is closed, the dust removal device 13 includes a plurality of parallelly arranged cyclone dust collectors 123 communicated with the waste gas outlet pipe 122, the air inlet of each cyclone dust collector 123 is communicated with the waste gas outlet pipe 122, the air outlet of each cyclone dust collector 123 is communicated through a communication pipe 124, and the end of the communication pipe 124 far away from the cyclone dust collector 123 is communicated with a second air extractor 125, and the air outlet of the second air extractor 125 is communicated with an air path pipe 126.

[0040] As Figure 2 The second air extractor 125 collects the air entering the middle drying section 151 and the upper cooling section 171 into the lower part of the rear air chamber 12 and leads out, and is discharged after being filtered by each cyclone dust collector 123.

[0041] As Figure 2 The heating device 111 is arranged at the bottom of the front air chamber 11, the heating device 111 can be a natural gas burner, the bottom of the front air chamber 11 is provided with a louvered air inlet 112 outside, the front air chamber 11 is designed as a variable cross-section structure from bottom to top, that is, the cross-sectional area decreases from bottom to top, which is convenient for increasing the air pressure, and the inner wall of the bottom of the front air chamber 11 is provided with a vertical first air guide plate 113, the upper end of the first air guide plate 113 extends to the lower end of the uppermost drying section 151 of the middle drying section 16, at this time, the first air guide plate 113 is arranged to guide the flow of hot air, so that the hot air can flow upward for a short distance along the first air guide plate 113 and then blow to each drying section 151;

[0042] As Figure 2 and Figure 5, the front air chamber 11 is provided with a turnover gate 114 at the position corresponding to the slow recovery section 152 of the lowermost layer of the upper drying part 15, which closes the air inside the front air chamber 11 to continue moving upward, and when the turnover gate 114 is closed, the front air chamber 11 is divided into two parts, and the hot air cannot enter the upper drying section 151. The purpose of this design is that when the grain drying system just starts to work, the grain enters from the feed inlet 141 of the storage section 14, and the grain flows in the drying machine body 1, at this time the turnover gate 114 is closed, so that the hot air is concentrated into the middle drying part 16 to dry the grain, and then the turnover gate 114 is opened, so that the hot air enters the upper end of the turnover gate 114, which is convenient for the upper drying part 15 to work and dry the grain, thereby improving the drying efficiency.

[0043] As Figure 2 And Figure 5 Finally, when there is no grain, the upper end of the drying machine body 1 is empty, at this time the turnover gate 114 is closed again, so that the hot air enters the middle drying part 16 to dry the grain, and the hot air still passes through the upper drying part 15 to heat the inside of the drying machine body which has no grain.

[0044] As Figure 2 And Figure 5 The setting of the turnover gate 114 makes the front air chamber 11 realize segmented drying, which is convenient for the drying system to realize segmented drying when it is just opened and when there is no grain into the storage section 14, thereby improving the drying efficiency.

[0045] As Figure 2 And Figure 5 The rear air chamber 12 is provided with an extension plate 127 extending downward at a position corresponding to the upper part of the middle drying part 16, the extension plate 127 extends away from the drying machine body 1, and the extension plate 127 is provided with a second air guide plate 128 extending vertically downward at the end away from the drying machine body 1, and the lower end of the second air guide plate 128 is located above the lowermost layer of the middle drying machine. The second air guide plate 128 makes the air flowing to the first and second fans in the rear air chamber 12 play a guiding role. In addition, the air entering the rear air chamber 12 contains large and heavy dust or shell, which performs gravity sedimentation in the rear air chamber 12 and settles at the bottom of the rear air chamber 12, at this time the side wall of the rear air chamber 12 can be provided with a cleaning door for cleaning the sediment in the rear air chamber 12.

[0046] As Figure 2 And Figure 5The turnover gate 114 comprises rotating shafts 115 connected between opposite side walls of the front air chamber 11, and the rotating shafts 115 are provided with closing plates 116. When the closing plates 116 are rotated to the horizontal position, the hot air is prevented from flowing upwards along the front air chamber 11. The front air chamber 11 is provided with driving members for driving the closing plates 116 to rotate.

[0047] As Figure 2 and Figure 5 The driving members comprise connecting blocks 1161 arranged at lower end faces of the closing plates 116 and distributed close to the rotating shafts 115. The lower end of each connecting block 1161 is rotatably connected with a first swing rod 1162. Swing blocks 1163 are rotatably connected to the inner wall of the front air chamber 11. The swing blocks 1163 are arranged close to the first swing rods 1162, i.e. one first swing rod 1162 corresponds to one swing block 1163. The end of the first swing rod 1162 away from the connecting block 1161 is hingedly connected to the swing block 1163. The inner wall of the front air chamber 11 is rotatably connected with a driving plate 1164 between the swing blocks 1163. The two ends of the driving plate 1164 are rotatably connected with second swing rods 1165. The point at which the driving plate 1164 is rotatably connected to the inner wall of the front air chamber 11 is between the points at which the second swing rods 1165 are rotatably connected to the driving plate 1164. The ends of the second swing rods 1165 away from the driving plate 1164 are respectively hingedly connected to the swing blocks 1163. The outer wall of the front air chamber 11 is provided with a motor for driving the driving plate 1164 to rotate.

[0048] As Figure 2 and Figure 5 At this time, the motor drives the driving plate 1164 to rotate back and forth within a certain angle, so that the driving plate 1164 drives the ends of the second swing rods 1165 to rotate around the rotating point of the driving plate 1164 and the front air chamber 11, and then the ends of the second swing rods 1165 are displaced, so that the second swing rods 1165 respectively drive the swing blocks 1163 to rotate around the rotating point of the swing blocks 1163 and the front air chamber 11, and then the swing blocks 1163 drive the first swing rods 1162 to move upwards or downwards, and then the closing plates 116 are gradually opened or closed.

[0049] As Figure 2 and Figure 2One of the closing plates 116 is provided with a first inclined plate 1166 extending downward and inclined to the rotation shaft 115 connected with the closing plate 116, the other closing plate 116 is provided with a second inclined plate 1167 matched with the first inclined plate 1166 and located below the first inclined plate 1166, and the second swing lever 1165 driving the closing plate 116 rotating with the first inclined plate 1166 is located above the other second swing lever 1165. At this time, the first inclined plate 1166 and the second inclined plate 1167 are arranged to make the two closing plates 116 have better sealing performance at the abutting position, and the arrangement of the first inclined plate 1166 and the second inclined plate 1167 will not affect the opening of the closing plate 116.

[0050] As Figure 2 , the front air chamber 11 is provided with a horizontal first air baffle 117 at the upper end of the side of the first air baffle 113 facing the dryer body 1, the first air baffle 117 makes the outside of the upper cooling section 171 and the lower cooling section 172 form a separate cavity, i.e. the first air baffle 117 is above the upper cooling section 171, the rear air chamber 12 is provided with a second air baffle 118 at the position corresponding to the lower cooling section 172, one end of the second air baffle 118 is connected with the outer wall of the dryer body 1, and the other end is connected with the inner wall of the bottom of the rear air chamber 12, the second air baffle 118 makes the outside of the lower cooling section 172 form a separate cavity, and the rear air chamber 12 is provided with a plurality of air inlet butterfly valves 129 on the bottom between the second air baffle 118 and the dryer body 1.

[0051] As Figure 2 , when the first air fan and the second air fan perform air exhaust on the rear air chamber 12, in addition to the rear air chamber 12 being a negative pressure cavity, the inside of the dryer body 1 and the front air chamber 11 form a negative pressure cavity, the arrangement of the negative pressure cavity will not make the grain flow to the rear air chamber 12 along with the airflow, but only make the water vapor and dust and the shell enter the rear air chamber 12 along with the airflow, which is beneficial to the outward transfer of the internal moisture of the grain kernels. At this time, the arrangement of the negative pressure cavity makes the opening of the air inlet butterfly valve 129 make the external natural air enter the rear air chamber 12, and then enter the lower cooling section 172 and the upper cooling section 171.

[0052] As Figure 4 , in addition, a plurality of interval distributed material guide pipes 19 can be arranged in the upper cooling section 171 and the lower cooling section 172, both ends of the material guide pipe 19 extend out of the outer wall of the dryer body 1, which is convenient for ventilation and cooling and uniform cooling of the grain.

[0053] As Figure 6 and Figure 2 and Figure 4The discharging section 18 comprises a plurality of groups of discharging mechanisms, each group of discharging mechanisms comprising a plurality of discharging wheels 182 rotatably connected to the opposite inner wall of the drying machine body 1, a plurality of sprockets 183 arranged at the end of each discharging wheel 182 extending out of the outer wall of the drying machine body 1, a plurality of upper guide plates 184 arranged on the inner wall of the drying machine body 1 and located on the two sides of the discharging wheels 182, and a plurality of lower guide plates 185 arranged on the inner wall of the drying machine body 1 and located on the two sides of the discharging wheels 182. The outer wall of each discharging wheel 182 is provided with a plurality of blades 186 distributed along the length direction of the discharging wheel 182. There is a gap between each blade 186 and the upper guide plate 184 or the lower guide plate 185. The lower end of the upper guide plate 184 is located above the discharging wheel 182, and the lower end of the lower guide plate 185 is located below the discharging wheel 182. When the two upper guide plates 184 of the adjacent two discharging wheels 182 are opposite to each other, the two upper guide plates 184 are connected to each other. When the two lower guide plates 185 of the adjacent two discharging wheels 182 are opposite to each other, the two lower guide plates 185 are connected to each other. Each sprocket 183 is connected by an annular chain (not shown in the figure). The outer wall of the drying machine body 1 is provided with a first motor (not shown in the figure) for driving one of the sprockets 183 to rotate.

[0054] As Figure 6 and Figure 2 and Figure 6 The first motor drives each sprocket 183 to rotate simultaneously, so that the grain entering the upper guide plate 184 and the lower guide plate 185 enters the discharging wheel 182, and then is turned out of the gap between the upper guide plate 184 and the lower guide plate 185 by the rotating discharging wheel 182, thereby facilitating the discharge of the dried grain.

[0055] As Figure 2 and Figure 6 The lower end of each upper guide plate 184 is hingedly connected with a movable flap 187. There is a gap between each movable flap 187 and the discharging wheel 182. The inner wall of the drying machine body 1 is provided with a power member for driving the movable flaps 187 above the adjacent two discharging wheels 182 to rotate simultaneously. The power member comprises a rotating disc 188 rotatably connected to the opposite inner wall of the drying machine body 1. The rotating disc 188 is located between the adjacent two discharging wheels 182 and between the two movable flaps 187. The axis of the rotating disc 188 is parallel to the axis of each discharging wheel 182. Two opposite driving rods 1881 are hingedly connected to the disc surface of the rotating disc 188. The ends of the two driving rods 1881 away from the rotating disc 188 are respectively hingedly connected to the side walls of the two movable flaps 187. The hingedly connected points of the two driving rods 1881 and the disc surface of the rotating disc 188 are located on the two sides of the vertical line of the center of the rotating disc 188 and are distributed in a staggered manner. The outer wall of the drying machine body 1 is provided with a second motor (not shown in the figure) for driving the rotating disc 188 to rotate.

[0056] As Figure 1 and Figure 2When the second motor drives the rotating disc 188 to rotate, the rotating disc 188 drives the two driving rods 1881 to displace, and then the two driving rods 1881 drive the two movable flaps 187 to rotate respectively, and then the gap between the lower end of the movable flap 187 and the grain discharging wheel 182 is adjusted, and the gap is adjustable so as to facilitate the clearance of the impurities blocked above the grain discharging wheel 182.

[0057] As ​ and ​ Rock wool heat preservation layers are arranged at exposed positions of the drying machine body 1, the front air chamber 11 and the rear air chamber 12, and the outer side of the heat preservation layers is covered with profiled galvanized steel plates (not shown in the figure).

[0058] Obviously, various modifications and changes can be made to the present application by those skilled in the art without departing from the spirit and scope of the present application. Thus, it is intended that the present application cover the modifications and changes as long as they come within the scope of the claims and their equivalents.

Claims

1. A high-efficiency quality-maintaining grain drying system, characterized in that, The dryer body (1) is provided with a feed inlet (141) at the upper end of the grain storage section (14) and a discharge outlet (181) at the lower end of the discharge section (18). The upper drying part (15) and the middle drying part (16) each include a drying section (151) and a recovery section (152). The lowermost recovery section (152) of the middle drying part (16) is communicated with the lower cooling section (17), the lower cooling section (17) is provided with an upper cooling section (171) and a lower cooling section (172), the rear air chamber (12) is provided with a ventilation part for passing external air to the lower cooling section (17), the external air first enters the lower cooling section (172) and then enters the upper cooling section (171), the lower cooling section (172) is communicated with the discharge section (18), and the grain is discharged from the discharge section (18) to the dryer body (1). The rear air chamber (12) is provided with a first air extractor (121) for extracting air at the top of the rear air chamber (12), the middle and lower parts of the rear air chamber (12) are communicated with a waste gas outlet pipe (122), the dust removal device (13) includes a plurality of parallelly arranged cyclone dust collectors (123) communicated with the waste gas outlet pipe (122), the air inlets of the cyclone dust collectors (123) are communicated with the waste gas outlet pipe (122), the air outlets of the cyclone dust collectors (123) are communicated through a communication pipe (124), one end of the communication pipe (124) away from the cyclone dust collector (123) is communicated with a second air extractor (125), and the air outlet of the second air extractor (125) is communicated with an air path pipe (126). The heat supply device (111) is arranged at the bottom of the front air chamber (11), a louvered air inlet (112) is arranged on the outer side of the bottom of the front air chamber (11), the bottom of the front air chamber (11) is designed as a variable cross-section structure from bottom to top, that is, the cross-sectional area decreases from bottom to top, a vertical first air guide plate (113) is arranged on the inner wall of the bottom of the front air chamber (11), the upper end of the first air guide plate (113) extends to the lower end of the uppermost drying section (151) of the middle drying part (16), a turnover gate (114) for closing the air in the front air chamber (11) and preventing the air from moving upward is arranged on the front air chamber (11) at a position corresponding to the lowermost recovery section (152) of the upper drying part (15), an extension plate (127) extending downward is arranged on the rear air chamber (12) at a position corresponding to the upper part of the middle drying part (16), the extension plate (127) extends away from the drying machine body (1), and a vertical second air guide plate (128) extending downward is arranged on the extension plate (127) at a position away from the drying machine body (1), and the lower end of the second air guide plate (128) is located above the lowermost drying section (151) of the middle drying machine. A horizontal first air baffle (117) is arranged on the upper end of the side of the first air guide plate (113) facing the drying machine body (1), so that an outer side of the upper cooling section (171) and the lower cooling section (172) form a separate cavity, a second air baffle (118) is arranged on the rear air chamber (12) at a position corresponding to the lower cooling section (172), one end of the second air baffle (118) is connected with the outer wall of the drying machine body (1), the other end is connected with the inner wall of the bottom of the rear air chamber (12), and the second air baffle (118) makes the outer side of the lower cooling section (172) form a separate cavity, and a plurality of air inlet butterfly valves (129) are arranged on the bottom of the rear air chamber (12) between the second air baffle (118) and the drying machine body (1).

2. The high-efficiency quality-maintaining grain drying system according to claim 1, characterized in that, The drying section (151) and the recovery section (152) are all guide pipes (19) with a triangular longitudinal cross-section, the guide pipes (19) are connected with the inner wall of the drying machine body, the guide pipes (19) on the same layer in the drying machine body are distributed at intervals, the guide pipes (19) on the upper and lower layers in the drying machine body are distributed in a staggered manner, the guide pipes (19) on the upper layer are opposite to the space between the two guide pipes (19) on the lower layer, the lower end surface of each guide pipe (19) is open, one end of the guide pipes (19) on one layer in the drying section (151) is communicated with the front air chamber (11), one end of the guide pipes (19) on the layer below is communicated with the rear air chamber (12), and one end of each guide pipe (19) in the recovery section (152) is communicated with the rear air chamber (12).

3. The high-efficiency quality-maintaining grain drying system according to claim 2, characterized in that, The turnover gate (114) comprises rotating shafts (115) connected between opposite side walls of the front air chamber (11), and two of the rotating shafts (115) are provided with closing plates (116), and the two rotating shafts (115) are distributed close to the side walls of the front air chamber (11), when the two closing plates (116) are rotated to the horizontal position, the hot air flowing upwards along the front air chamber (11) is blocked, and the front air chamber (11) is provided with driving members for driving the two closing plates (116) to rotate.

4. The high-efficiency quality-preservation type grain drying system according to claim 3, characterized in that, The driving members comprise connecting blocks (1161) arranged at lower end faces of the two closing plates (116), the lower end of each connecting block (1161) is rotatably connected with a first swing rod (1162), swing blocks (1163) are rotatably connected to the inner wall of the front air chamber (11), the swing blocks (1163) are arranged in two and are distributed close to the first swing rods (1162), the ends of the first swing rods (1162) away from the connecting blocks (1161) are hingedly connected to the swing blocks (1163), a driving plate (1164) is rotatably connected to the inner wall of the front air chamber (11) between the two swing blocks (1163), the two ends of the driving plate (1164) are rotatably connected with second swing rods (1165), the point at which the driving plate (1164) is rotatably connected to the inner wall of the front air chamber (11) is located between the points at which the two second swing rods (1165) are rotatably connected to the driving plate (1164), the ends of the second swing rods (1165) at the upper and lower ends of the driving plate (1164) away from the driving plate (1164) are respectively hingedly connected to the two swing blocks (1163), and the outer wall of the front air chamber (11) is provided with a motor for driving the driving plate (1164) to rotate.

5. The high-efficiency quality-preservation type grain drying system according to claim 4, characterized in that, One of the closing plates (116) is provided at an end thereof away from the rotating shaft (115) with a first inclined plate (1166) extending downwardly and inclined toward the rotating shaft (115) connected to the closing plate (116), the other closing plate (116) is provided with a second inclined plate (1167) located below the first inclined plate (1166) and matched with the first inclined plate (1166), and the second swing rod (1165) driving the closing plate (116) to rotate is located above the other second swing rod (1165).

6. The high-efficiency quality-maintaining grain drying system according to claim 1, characterized in that, The grain discharging section (18) comprises multiple groups of grain discharging mechanisms, each group of grain discharging mechanisms comprising a grain discharging wheel (182) rotatably connected to the inner wall of the drying machine body (1), a chain wheel (183) arranged at the end of each grain discharging wheel (182) extending out of the outer wall of the drying machine body (1), an upper guide plate (184) and a lower guide plate (185) arranged on the inner wall of the drying machine body (1) and located on both sides of the grain discharging wheel (182), the outer wall of the grain discharging wheel (182) being provided with a plurality of blades (186) distributed along the length direction of the grain discharging wheel (182), gaps being present between the upper guide plate (184), the lower guide plate (185) and the blades (186), the lower end of the upper guide plate (184) being located above the grain discharging wheel (182), the lower end of the lower guide plate (185) being located below the grain discharging wheel (182), the two upper guide plates (184) of adjacent two grain discharging wheels (182) being connected to each other when facing each other, the lower guide plates (185) of adjacent two grain discharging wheels (182) being connected to each other when facing each other, each chain wheel (183) being connected through an annular chain, and the outer wall of the drying machine body (1) being provided with a first motor for driving one of the chain wheels (183) to rotate.

7. The high-efficiency quality-maintaining grain drying system according to claim 6, characterized in that, The lower end of each upper guide plate (184) is hingedly connected with a movable flap (187), gaps being present between each movable flap (187) and the grain discharging wheel (182), a power member for driving the movable flaps (187) above adjacent two grain discharging wheels (182) to rotate simultaneously being arranged on the inner wall of the drying machine body (1), the power member comprising a rotating disc (188) rotatably connected to the opposite inner walls of the drying machine body (1), the rotating disc (188) being located between adjacent two grain discharging wheels (182) and between two movable flaps (187), the axis of the rotating disc (188) being parallel to the axes of each grain discharging wheel (182), and two opposite driving rods (1881) being hingedly connected to the disc surface of the rotating disc (188), one end of each driving rod (1881) being hingedly connected to the side wall of each movable flap (187), the hingedly connected points of the two driving rods (1881) and the disc surface of the rotating disc (188) being located on both sides of the vertical center line of the rotating disc (188) and being distributed in staggered positions in height, and the outer wall of the drying machine body (1) being provided with a second motor for driving the rotating disc (188) to rotate.

Images