Multifunctional dryer

Abstract

The invention discloses a multifunctional drying machine which comprises a shell. The drying inner bin is arranged in the shell, a hot air inlet channel is formed by one side of the drying inner bin and the shell, a hot air outlet channel is formed by the other side of the drying inner bin and the shell, a backflow port is formed in the bottom of the hot air outlet channel, and a valve plate is installed on the backflow port to control opening and closing of the backflow port; the mixing chamber is formed at the bottom of the shell and is used for entering hot air; the backflow channel is arranged in the shell, one end of the backflow channel communicates with the hot air outlet channel through the backflow opening, and the other end of the backflow channel communicates with the mixing chamber. The air inlet end of the fan communicates with the mixing chamber, and the air outlet end of the fan communicates with the hot air inlet channel. Hot and humid air is guided into the mixing chamber again through the backflow channel to be mixed with fresh hot air, circulating drying can be achieved, energy consumption can be reduced, appropriate humidity can be kept in the drying process, the phenomenon that agricultural products crack due to uneven drying inside and outside is avoided, and the quality of the agricultural products is protected; the machine can adapt to different types of agricultural products, and the application range of the machine is widened.

Description

Technical Field

[0001] The invention relates to the technical field of drying equipment, in particular to a multifunctional drying machine. Background Art

[0002] In modern agricultural production, drying of agricultural products is a key link to ensure their quality and extend their storage period. In order to avoid the influence of weather, existing drying usually uses dryers for hot air drying. However, traditional dryers usually continuously send in hot air and continuously discharge hot and humid air. The discharged hot and humid air still has high heat and consumes a lot of energy. At the beginning of drying, continuous discharge of hot and humid air can easily lead to excessive drying of the surface of agricultural products. The surface of agricultural products loses water quickly, but the internal moisture fails to evaporate in time, resulting in uneven drying inside and outside, which eventually causes the agricultural products to dry and crack, affecting their appearance and quality, and even reducing their market value. In addition, the existing dryers have a relatively complex structure and occupy a large area. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a multifunctional drying machine.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows: The vents in the hot air vents are connected to the hot air inlet passage through the vents, and the vents in the hot air vents are connected to the hot air outlet passage through the vents. The channel is connected; a discharging mechanism is provided at the bottom of the drying inner bin; the discharging mechanism comprises a discharging frame, a material guiding triangle plate, a support plate, a lifting and adjusting mechanism and a swinging mechanism; one of the sharp corners of the material guiding triangle plate is arranged upward, the material guiding triangle plate is installed in the discharging frame, the material guiding triangle plates are arranged at intervals along the left and right directions, and adjacent material guiding triangle plates form a first material passing gap at the bottom; the support plate is arranged below the first material passing gap, and a second material passing gap is formed at the bottom of the support plate and the material guiding triangle plate; the lifting and adjusting mechanism is installed on the discharging frame, the lifting and adjusting mechanism is connected to the support plate, and is used to drive the support plate to lift and lower so as to adjust the spacing of the second material passing gap; the swinging mechanism is installed on the discharging frame, the swinging mechanism is connected to the support plate, and is used to drive the support plate to swing back and forth so as to drive the material on the support plate to pass through the second material passing gap.

[0005] Furthermore, a conical buffer bin is connected to the bottom of the discharge mechanism, and a material outlet is provided at the bottom of the conical buffer bin.

[0006] Furthermore, a hot air chamber is formed between the bottom of the shell and the conical buffer bin, the mixing chamber is located on one side of the conical buffer bin, and the hot air chamber is located on the other side of the conical buffer bin, and a heating mechanism is installed in the hot air chamber.

[0007] Furthermore, the conical buffer bin is provided with an air guide triangle pipe to guide the hot air in the hot air chamber into the mixing chamber; and two reflux channels are provided and are arranged on both sides of the conical buffer bin.

[0008] Furthermore, the lifting and adjusting mechanism includes a rotating shaft rotatably installed on the unloading frame, and the rotating shaft is inserted into the space surrounded by the material guiding triangle plate; a swing arm that can rotate synchronously with the rotating shaft is installed on the rotating shaft, and the end of the swing arm away from the rotating shaft is hinged with a connecting rod, and the end of the connecting rod away from the swing arm is hinged to the support plate, and the width of the support plate is greater than the width of the first material passing gap.

[0009] Furthermore, one end of the rotating shaft passes through the side wall of the blanking frame and is connected to a swing handle, and the swing handle rotates synchronously with the rotating shaft; the outer side of the blanking frame corresponding to the swing handle is provided with a connecting seat, and the connecting seat is provided with two vertical blocks arranged at intervals, and the swing handle is located between the two vertical blocks and can swing between the two vertical blocks; a limit bar is provided at one end of the vertical block away from the connecting seat, and the swing handle is located between the connecting seat and the limit bar, and the limit bar is provided with sockets arranged around the rotating shaft, and the swing handle is installed with a limiting structure to select one of the sockets for alignment and insertion.

[0010] Furthermore, the limiting structure is a plug column; an upper lifting plate is connected to the swing handle at intervals, the upper lifting plate is provided with a movable hole aligned with the socket, the plug column is movably inserted into the movable hole, one end of the plug column is used to insert into the socket, and the other end passes through the movable hole and is installed with a nut, the peripheral wall of the plug column is provided with a radial convex ring, the plug column sleeve is provided with a compression spring, the two ends of the compression spring are respectively abutted against the radial convex ring and the upper lifting plate, a pressing handle is hinged on the upper lifting plate, one end of the pressing handle is provided with a lifting part, and the other end is provided with an operating part, the lifting part is provided with a U-shaped groove for the plug column to be embedded; the lifting part is located between the nut and the upper lifting plate, so that when the operating part is pressed, the lifting part can lift the nut and the plug column to make the plug column disengage from the socket.

[0011] Furthermore, it also includes a circulating conveying device, which is used to receive the material output from the material outlet and convey the material back to the drying inner bin.

[0012] Furthermore, the shell is provided with a dehumidification port corresponding to the hot air outlet channel, and a dehumidifier is installed at the dehumidification port.

[0013] The present invention has the following beneficial effects: By providing a reflux port and a valve plate, the present invention can control the reflux of hot and humid air, so that the exhausted hot and humid air can be recycled, reducing heat loss, reducing energy consumption, and improving energy utilization efficiency; and the hot and humid air is reintroduced into the mixing chamber through the reflux channel to be mixed with fresh hot air, which can achieve cyclic drying, reduce energy consumption, and maintain appropriate humidity during the drying process, avoiding the cracking of agricultural products due to uneven drying inside and outside, thereby protecting the quality of agricultural products. The mixing chamber can ensure that the hot and humid air is mixed with the fresh hot air before being sent into the drying inner bin, avoiding uneven drying caused by uneven humidity and temperature of the air sent in, making the drying effect more uniform; through the cooperation of the lifting and adjusting mechanism and the swinging mechanism, the spacing of the second feeding gap can be adjusted, and the material on the pallet can be driven through the second feeding gap, thereby realizing adaptive grain discharge for agricultural products of different particle sizes; the gap size can be adjusted according to agricultural products of different particle sizes, thereby improving the adaptability of the machine and solving the problem that traditional grain discharge wheels are difficult to adapt to agricultural products of different particle sizes; the hot air inlet channel, the hot air outlet channel, and the mixing chamber are all defined and formed by the shell and other components in the shell, without the need for additional structure, the structure is more streamlined, and the overall structure is arranged vertically, occupying a small area.

[0014] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 is an internal cross-sectional view of an embodiment of the present invention; Figure 3 yes Figure 2 A cross-sectional view at point aa of ; Figure 4 is a partial cross-sectional view of the hot air outlet channel of an embodiment of the present invention; Figure 5 It is a structural diagram of the discharge mechanism; Figure 6 It is a cross-sectional view of the discharge mechanism; Figure 7 yes Figure 6 A magnified view of point A; Figure 8 It is a structural diagram of the discharge mechanism from the bottom perspective; Fig. 9 yes Figure 8 A magnified view of point B; Fig.10 yes Figure 8 Enlarged view of point C; Fig.11 yes Figure 8 A magnified view of point D; Fig.12 It is a schematic diagram of the exploded state structure of the swing handle and the connecting seat; Fig.13 is a schematic diagram of the structure of a circulating conveying device included in an embodiment of the present invention; Fig.14 It is a schematic diagram of the connection structure between the swing handle and the connecting seat according to another embodiment of the present invention.

[0016] Legend: Shell 100, hot air chamber 110; Drying inner chamber 200, hot air inlet channel 210, air outlet 211, hot air outlet channel 220, return port 221, valve plate 222, moisture removal port 223, air inlet angle iron 230, air outlet angle iron 240; Mixing chamber 300, air inlet 310; A reflux channel 400; Fan 500; Discharging mechanism 600, unloading frame 610, connecting seat 611, upright block 612, limiting strip 613, plug hole 614, material guiding triangle plate 620, first material feeding gap 621, reinforcing rib plate 622, supporting plate 630, second material feeding gap 631, serial rod 632, lifting and lowering adjustment mechanism 640, rotating shaft 641, swing arm 642, connecting rod 643, swing handle 644, lifting plate 645, movable hole 646, swing mechanism 650, motor 651, eccentric block 652, transmission rod 653, plug column 660, nut 661, radial convex ring 662, compression spring 663, pressing handle 670, lifting part 671, operating part 672, U-shaped notch 673; Conical buffer bin 700, material outlet 710, heating mechanism 720, air guide triangle pipe 730; Circular conveyor device 800. DETAILED DESCRIPTION

[0017] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0021] Please refer to Figures 1 to 4 A multifunctional dryer in a preferred embodiment of the present invention includes a shell 100, a drying inner chamber 200, a mixing chamber 300, a reflow channel 400 and a fan 500.

[0022] A feed port is provided at the top of the housing 100. The drying inner bin 200 is provided in the housing 100, and an opening is provided at the upper end of the drying inner bin 200. A hot air inlet channel 210 is formed between the drying inner bin 200 and the housing 100 on one side, and a hot air outlet channel 220 is formed between the drying inner bin 200 and the housing 100 on the other side. A return port 221 is provided at the bottom of the hot air outlet channel 220, and a valve plate 222 is installed on the return port 221 to control the opening and closing of the return port 221. The valve plate 222 can be driven to rotate by an external motor to realize the opening or closing of the return port 221. The drying inner chamber 200 is provided with an air inlet angle iron 230 and an air outlet angle iron 240. The air inlet angle iron 230 is connected to the hot air inlet passage 210 to introduce hot air into the drying inner chamber 200. The air inlet angle iron 230 is opened at one end corresponding to the hot air inlet passage 210 to communicate with the hot air inlet passage 210, and the other end is closed to avoid direct hot air into the hot air outlet passage 220. The bottom of the air inlet angle iron 230 is open to introduce hot air into the drying inner chamber 200. The air outlet angle iron 240 is connected to the hot air outlet passage 220 to guide hot and humid air out of the drying inner chamber 200. The air outlet angle iron 240 is opened at one end corresponding to the hot air outlet passage 220 to communicate with the hot air outlet passage 220, and the other end is closed to avoid communication with the hot air inlet passage 210. The bottom of the air outlet angle iron 240 is open to discharge hot and humid air into the hot air outlet passage 220. In order to ensure drying uniformity, the air inlet angle iron 230 and the air outlet angle iron 240 are arranged vertically and the air inlet angle iron 230 and the air outlet angle iron 240 are staggered vertically.

[0023] The mixing chamber 300 is formed at the bottom of the housing 100 for the hot air to enter. The return channel 400 is provided in the housing 100, one end of the return channel 400 is connected to the hot air outlet channel 220 through the return port 221, and the other end is connected to the mixing chamber 300, so as to introduce the hot and humid air into the mixing chamber 300 and mix it with the hot air.

[0024] The air inlet of the fan 500 is connected to the mixing chamber 300, and the air outlet is connected to the hot air inlet channel 210. The mixing chamber 300 is provided with an air inlet 310 connected to the air inlet of the fan 500, and the bottom of the hot air inlet channel 210 is provided with an air outlet 211 connected to the air outlet of the fan 500.

[0025] The multifunctional drying machine provided by the present invention can control the reflux of hot and humid air by setting a reflux port 221 and a valve plate 222, so that the discharged hot and humid air can be recycled, reducing heat loss, reducing energy consumption, and improving energy utilization efficiency; and the hot and humid air is reintroduced into the mixing chamber 300 through the reflux channel 400 to be mixed with fresh hot air, so that the appropriate humidity can be maintained during the drying process, avoiding the cracking of agricultural products due to uneven drying inside and outside, and protecting the quality of agricultural products. The mixing chamber 300 can ensure that the hot and humid air is mixed with the fresh hot air before being sent to the drying inner chamber 200, avoiding uneven drying caused by uneven humidity and temperature of the air sent in, and making the drying effect more uniform.

[0026] It is understandable that a temperature and humidity meter can be set in the drying inner chamber 200 to monitor the temperature and humidity of the drying inner chamber 200. When drying starts, the valve plate 222 is opened, and the hot and humid air is re-introduced into the mixing chamber 300 to mix with fresh hot air, so as to avoid excessive drying of the surface of the agricultural products at the beginning of the drying stage, while the internal moisture fails to evaporate in time, resulting in uneven drying inside and outside, causing the agricultural products to crack; when the moisture inside and outside the agricultural products is dried out, the valve plate 222 can be gradually closed, and the residual heat gas with moisture can be finally discharged.

[0027] like Figure 2 As shown, in some embodiments of the present invention, the shell 100 is provided with a dehumidification port 223 corresponding to the hot air outlet channel 220, and a switch valve is provided at the dehumidification port. In order to speed up the exhaust, an exhaust fan can also be provided at the dehumidification port to speed up the exhaust.

[0028] Reference Figure 2 In some embodiments of the present invention, a discharge mechanism 600 is provided at the bottom of the drying inner bin 200, and a conical buffer bin 700 is connected to the bottom of the discharge mechanism 600, and a material outlet 710 is provided at the bottom of the conical buffer bin 700. When the drying process of the material in the drying inner bin 200 is completed, the material can be discharged downward through the discharge mechanism 600 and fall into the conical buffer bin 700, and finally discharged through the material outlet 710.

[0029] Reference Figure 2 In a further embodiment of the present invention, a hot air chamber 110 is formed at the bottom of the shell 100 and the conical buffer bin 700, the mixing chamber 300 is located on one side of the conical buffer bin 700, and the hot air chamber 110 is located on the other side of the conical buffer bin 700, so that the layout is convenient and the space utilization rate is high. A heating mechanism 720 is installed in the hot air chamber 110, so that the heating mechanism is integrated to generate heat. The heating mechanism 720 can be a heat exchange bin of a combustion furnace, so as to heat the air in the hot air chamber 110. Of course, in other embodiments, the heating mechanism 720 can also be an electric heating mechanism. In addition, the heating mechanism 720 can also be external, and hot air can be sent into the hot air chamber 110 through a pipeline.

[0030] Reference Figure 2 and Figure 4 In a further embodiment of the present invention, the conical buffer bin 700 is provided with an air guide triangle pipe 730 to guide the hot air from the hot air chamber 110 into the mixing chamber 300; the air guide triangle pipe 730 runs through the conical buffer bin 700, and both ends of the air guide triangle pipe 730 are opened to connect the mixing chamber 300 and the hot air chamber 110. There are two reflux channels 400 and they are arranged on both sides of the conical buffer bin 700. The reflux channels 400 are formed by the outer wall of the conical buffer bin 700, the shell 100 and the metal plate, and the cross-sectional profile is a triangle or a trapezoid. Figure 2 As shown, the hot air chamber 110 is located below the hot air outlet channel 220, and the two are separated by a metal plate; the mixing chamber 300 is located below the hot air inlet channel 210, and the two are separated by a metal plate. Through the reasonable arrangement of each chamber and channel, the overall volume and floor space are reduced.

[0031] Reference Figure 5 , Figure 6 and Figure 7 In some embodiments of the present invention, the discharge mechanism 600 includes a discharge frame 610 , a material guide triangle plate 620 , a support plate 630 , a lifting and lowering adjustment mechanism 640 and a swing mechanism 650 .

[0032] One of the sharp corners of the material guide triangle plate 620 is set upward, and the material converges downward along the inclined side of the material guide triangle plate 620. The material guide triangle plate 620 is installed in the unloading frame 610. The material guide triangle plates 620 are arranged at intervals along the left and right directions. Adjacent material guide triangle plates 620 form a first material passing gap 621 at the bottom for material to pass through. Usually, the first material passing gap 621 is fixed and cannot be adjusted.

[0033] The support plate 630 is arranged below the first material feeding gap 621, and the support plate 630 and the bottom of the material guiding triangle plate 620 form a second material feeding gap 631; the material needs to pass through the second material feeding gap 631 to fall and realize the discharge. It can be understood that the number and position of the support plates 630 correspond to the first material feeding gap 621, that is, a support plate 630 is correspondingly arranged below each first material feeding gap 621. The lifting and adjusting mechanism 640 is installed on the unloading frame 610, and the lifting and adjusting mechanism 640 is connected to the support plate 630, and is used to drive the support plate 630 to move up and down to adjust the spacing of the second material feeding gap 631.

[0034] The swing mechanism 650 is installed on the unloading frame 610, and the swing mechanism 650 is connected to the support plate 630, and is used to drive the support plate 630 to swing back and forth, so as to drive the material on the support plate 630 to pass through the second feeding gap 631. Usually, the material will be accumulated on the support plate 630, and it will not easily slip out of the second feeding gap 631, and the support plate 630 reciprocates left and right, which can bring the granular material out of the second feeding gap 631, and with the reciprocating motion, the material on the support plate 630 will gradually be squeezed to the edge and finally fall off, and the continuous reciprocating motion of the support plate 630 can achieve continuous material discharge. The second feeding gap 631 formed by the guide triangle plate 620 and the support plate 630 can be adjusted through the cooperation of the lifting adjustment mechanism 640 and the swing mechanism 650 to drive the material on the support plate 630 to pass through the second feeding gap 631, thereby realizing adaptive grain discharge for agricultural products with different particle sizes; the gap size can be adjusted according to agricultural products with different particle sizes, thereby improving the adaptability of the machine and solving the problem that traditional grain discharge wheels are difficult to adapt to agricultural products with different particle sizes. The agricultural products can be seeds of oil tea fruit or other agricultural products.

[0035] Reference Figures 6 to 9 In a further embodiment of the present invention, the lifting and adjusting mechanism 640 includes a rotating shaft 641 rotatably mounted on the material unloading frame 610, and a guide cylinder can be provided on the side wall of the material unloading frame 610 for the rotating shaft 641 to be rotatably mounted. The rotating shaft 641 is arranged in the space surrounded by the material guiding triangle plate 620; a swing arm 642 which can rotate synchronously with the rotating shaft 641 is installed on the rotating shaft 641, and a connecting rod 643 is hinged at one end of the swing arm 642 away from the rotating shaft 641, and a connecting rod 643 is hinged at one end of the connecting rod 643 away from the swing arm 642 to the supporting plate 630, and the width of the supporting plate 630 is greater than the width of the first material feeding gap 621. Figure 6As shown, the connecting rod 643 is in a vertical or nearly vertical state, at which time the rotating shaft 641 drives the swing arm 642 to rotate, and the most important thing is to change the height of the connecting rod 643 and the supporting plate 630. Although the supporting plate 630 will move to a certain extent in the width direction (left and right direction), since the width of the supporting plate 630 is greater than the width of the first feeding gap 621, within the range of motion of the supporting plate 630, even if the supporting plate 630 is driven by the swing arm 642 to have a certain displacement in the width direction, it will not affect the supporting plate 630 covering the first feeding gap 621 in the width direction, and will not affect the control of the blanking. Of course, in some other embodiments, the lifting and lowering adjustment mechanism can also be a telescopic motor, a telescopic cylinder or other mechanism to drive the lifting and lowering of the supporting plate 630.

[0036] Reference Figure 5 , Fig.11 and Fig.12 In a further embodiment of the present invention, one end of the rotating shaft 641 passes through the side wall of the blanking frame 610 and is connected to a swing handle 644. The swing handle 644 rotates synchronously with the rotating shaft 641, so that the rotating shaft 641 can be driven to rotate by operating the swing handle 644 outside the blanking frame 610, so as to facilitate the operation of the rotating shaft 641 to adjust the height of the second feeding gap 631. The blanking frame 610 is provided with a connecting seat 611 on the outer side of the swing handle 644, and the connecting seat 611 is provided with two spaced vertical blocks 612. The swing handle 644 is located between the two vertical blocks 612 and can swing between the two vertical blocks 612, thereby limiting the rotation range of the swing handle 644 and the rotating shaft 641. It can be understood that when the swing handle 644 swings between the two vertical blocks 612, the connecting rod 643 is always in a vertical or nearly vertical state, and the angle between the connecting rod 643 and the plumb line does not exceed 15 degrees, thereby minimizing the horizontal displacement of the support plate 630 during the lifting activity. A limit bar 613 is provided at one end of the vertical block 612 away from the connection seat 611, a swing handle 644 is located between the connection seat 611 and the limit bar 613, the limit bar 613 is provided with plug holes 614 arranged around the rotating shaft 641, and the swing handle 644 is installed with a limit structure to select one of the plug holes 614 for alignment and insertion. The limit structure is inserted into different plug holes 614, corresponding to the second feeding gap 631 of different sizes, so that the spacing of the second feeding gap 631 can be adjusted by switching different plug holes 614 to adapt to the feeding of agricultural products with different particle sizes.

[0037] Reference Figure 5 , Fig.11 and Fig.12In a further embodiment of the present invention, the limiting structure is a plug 660; an upper lifting plate 645 is connected to the swing handle 644 at intervals, and the upper lifting plate 645 is provided with a movable hole 646 aligned with the socket 614, and the plug 660 is movably inserted into the movable hole 646, one end of the plug 660 is used to insert into the socket 614, and the other end passes through the movable hole 646 and is installed with a nut 661, and a radial convex ring 662 is provided on the peripheral wall of the plug 660, and the radial convex ring 662 is located between the upper lifting plate 645 and the connecting seat 611, and the plug 660 is sleeved with a compression spring 663, and the two ends of the compression spring 663 are respectively against the radial convex ring 662 and the upper lifting plate 645, thereby applying a force to the plug 660 toward the socket 614, so that when there is no external force, the plug 660 can remain in the state of being inserted into the socket 614, so that the height of the support plate 630 and the spacing of the second material passing gap 631 remain stable. A pressing handle 670 is hinged on the upper lifting plate 645. A lifting portion 671 is provided at one end of the pressing handle 670, and an operating portion 672 is provided at the other end. The lifting portion 671 is provided with a U-shaped notch 673 for the insertion of the plug 660. The lifting portion 671 is located between the nut 661 and the upper lifting plate 645, so that when the operating portion 672 is pressed, the lifting portion 671 can lift the nut 661 and the plug 660 to make the plug 660 disengage from the insertion hole 614. The contour of the nut 661 is larger than the movable hole 646, so as to prevent the plug 660 from disengaging from the movable hole 646, and the outer peripheral contour of the nut 661 is larger than the plug 660, so that the lifting portion 671 can contact the nut 661 after avoiding the plug 660, so as to drive the nut 661 and the plug 660 to be lifted. The plug 660 can be easily lifted by the pressing handle 670, and the operation is simple. Generally, the types of agricultural products processed are fixed within a period of time, so there is generally no need to frequently adjust the size of the second feed gap 631 in real time to adapt to different agricultural products. When adjustment is needed, hold the lifting plate 645 and press the operating part 672, and the lifting part 671 lifts the nut 661 and the pin 660 to disengage the pin 660 from the socket 614. Then, operate the lifting plate 645 to rotate around the rotating shaft 641 to align the pin 660 with the socket 614 at another suitable position, then release the operating part 672, and reinsert the pin 660 into the aligned socket 614 to achieve the spacing size adjustment of the second feed gap 631 to meet the different drying and unloading requirements of agricultural products.

[0038] Reference Fig.14 In another embodiment of the present invention, the swing handle 644 can be provided with a hole to select one of the sockets 614 to align and install a positioning pin or a positioning screw to achieve the position fixation of the swing handle 644 after rotation adjustment.

[0039] Reference Figure 6 and Fig.10In some embodiments of the present invention, the swing mechanism 650 includes a motor 651, an eccentric block 652 and a transmission rod 653. The output shaft of the motor 651 is connected to the eccentric block 652 to drive the eccentric block 652 to rotate. One end of the transmission rod 653 is hinged to the support plate 630, and the other end is hinged to the eccentric block 652. Thus, the rotation of the motor 651 drives the eccentric block 652 to rotate, and the transmission rod 653 finally drives the support plate 630 to move left and right. It can be understood that when the support plate 630 moves left and right, the transmission rod 653 will drive the support plate 630 to move up and down in a small range. The up and down movement is conducive to the smooth flow of materials from the second feeding gap 631, and the left and right movement of the support plate 630 is combined with a small up and down jump, so that the material flow and feeding are smoother.

[0040] It is understandable that the pallets 630 can be arranged in multiple groups, each group includes more than two adjacent pallets 630, and the pallets 630 in the same group can be connected in series through the serial rods 632 at the bottom, while the pallets 630 in different groups are not connected, and the pallets 630 in different groups need to be provided with different lifting adjustment mechanisms 640 and swing mechanisms 650. In addition, there can be multiple serial rods 632 corresponding to the pallets 630 in the same group, and the lifting adjustment mechanism 640 and the swing mechanism 650 are connected to the serial rods 632. Of course, for the convenience of arrangement, the lifting adjustment mechanism 640 and the swing mechanism 650 can be connected to the serial rods 632 at different positions. Thereby, the swing mechanism 650 and the lifting adjustment mechanism 640 can drive multiple pallets 630 to move at the same time, reducing the number of driving mechanisms.

[0041] In order to ensure the structural strength of the material guide triangle plate 620, a reinforcing rib plate 622 is installed in the material guide triangle plate 620. The reinforcing rib plate 622 fits partially with the inner wall of the material guide triangle plate 620, thereby improving the structural strength of the material guide triangle plate 620 and reducing its deformation.

[0042] Reference Fig.13 The present invention also includes a circulating conveying device 800, which is used to receive the material output from the material outlet 710 and convey the material back to the drying inner bin 200, thereby realizing circulating drying and ensuring the drying effect.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multifunctional drying machine, characterized in that: include: Housing (100); The drying inner bin (200) is arranged in the shell (100), and has a hot air inlet channel (210) formed with the shell (100) on one side, and a hot air outlet channel (220) formed with the shell (100) on the other side, and a return port (221) is provided at the bottom of the hot air outlet channel (220), and a valve plate (222) is installed on the return port (221) to control the opening and closing of the return port (221); the drying inner bin (200) is penetrated by an air inlet angle iron (230) and an air outlet angle iron (240), the air inlet angle iron (230) is connected with the hot air inlet channel (210) to guide the hot air into the drying inner bin (200), and the air outlet angle iron (240) is connected with the hot air outlet channel (220) to guide the hot and humid air out of the drying inner bin (200); and a discharge mechanism (600) is provided at the bottom of the drying inner bin (200); A mixing chamber (300) formed at the bottom of the housing (100) for admitting hot air; A reflux channel (400) is disposed in the housing (100), one end of which is in communication with the hot air outlet channel (220) via the reflux port (221), and the other end of which is in communication with the mixing chamber (300) so as to guide the hot and humid air into the mixing chamber (300) and mix it with the hot air; The fan (500) has an air inlet end in communication with the mixing chamber (300), and an air outlet end in communication with the hot air inlet passage (210); the material discharge mechanism (600) comprises a material discharge frame (610), a material guide triangular plate (620), a support plate (630), a lifting and lowering adjustment mechanism (640) and a swing mechanism (650); one of the sharp corners of the material guide triangular plate (620) is arranged upward, the material guide triangular plate (620) is installed in the material discharge frame (610), the material guide triangular plates (620) are arranged at intervals, and adjacent material guide triangular plates (620) form a first material passing gap (621) at the bottom; the support plate (630) is arranged in the first material passing gap (621), a second material passing gap (631) is formed at the bottom of the support plate (630) and the material guiding triangle plate (620); the lifting and adjusting mechanism (640) is installed on the material unloading frame (610), and the lifting and adjusting mechanism (640) is connected to the support plate (630) and is used to drive the support plate (630) to move up and down to adjust the spacing of the second material passing gap (631); the swing mechanism (650) is installed on the material unloading frame (610), and the swing mechanism (650) is connected to the support plate (630) and is used to drive the support plate (630) to swing back and forth to drive the material on the support plate (630) to pass through the second material passing gap (631).

2. The multifunctional drying machine according to claim 1, characterized in that: The bottom of the material discharge mechanism (600) is connected to a conical buffer bin (700), and the bottom of the conical buffer bin (700) is provided with a material outlet (710).

3. The multifunctional drying machine according to claim 2, characterized in that: The bottom of the shell (100) and the conical buffer bin (700) form a hot air chamber (110); the mixing chamber (300) is located on one side of the conical buffer bin (700); the hot air chamber (110) is located on the other side of the conical buffer bin (700); and a heating mechanism (720) is installed in the hot air chamber (110).

4. The multifunctional drying machine according to claim 3, characterized in that: The conical buffer bin (700) is provided with an air guide triangle pipe (730) to guide the hot air in the hot air chamber (110) into the mixing chamber (300); two return channels (400) are provided and are arranged on both sides of the conical buffer bin (700).

5. The multifunctional drying machine according to claim 1, characterized in that: A reinforcing rib plate (622) is installed inside the material guiding triangle plate (620).

6. The multifunctional drying machine according to claim 1, characterized in that: The lifting and lowering adjustment mechanism (640) comprises a rotating shaft (641) rotatably mounted on the material unloading frame (610), the rotating shaft (641) being arranged in a space surrounded by the material guiding triangle plate (620); a swing arm (642) capable of rotating synchronously with the rotating shaft (641) is mounted on the rotating shaft (641), a connecting rod (643) is hingedly connected to one end of the swing arm (642) away from the rotating shaft (641), and an end of the connecting rod (643) away from the swing arm (642) is hingedly connected to a supporting plate (630), and a width of the supporting plate (630) is greater than a width of the first material passing gap (621).

7. The multifunctional drying machine according to claim 6, characterized in that: One end of the rotating shaft (641) passes through the side wall of the blanking frame (610) and is connected to a swing handle (644), and the swing handle (644) rotates synchronously with the rotating shaft (641); a connecting seat (611) is provided on the outer side surface of the blanking frame (610) corresponding to the swing handle (644), and the connecting seat (611) is provided with two vertical blocks (612) arranged at intervals, and the swing handle (644) is located between the two vertical blocks (612) and can swing between the two vertical blocks (612); a limiting strip (613) is provided at one end of the vertical block (612) away from the connecting seat (611), and the swing handle (644) is located between the connecting seat (611) and the limiting strip (613), and the limiting strip (613) is provided with plug holes (614) arranged around the rotating shaft (641), and the swing handle (644) is installed with a limiting structure so as to select one of the plug holes (614) for alignment and insertion.

8. The multifunctional drying machine according to claim 7, characterized in that: The limiting structure is a plug post (660); The swing handle (644) is connected to an upper lifting plate (645) at intervals, and the upper lifting plate (645) is provided with a movable hole (646) aligned with the insertion hole (614). The plug post (660) is movably inserted into the movable hole (646). One end of the plug post (660) is used to insert into the insertion hole (614), and the other end passes through the movable hole (646) and is installed with a nut (661). The peripheral wall of the plug post (660) is provided with a radial convex ring (662), and the plug post (660) is sleeved with a compression spring (663). The two ends of the compression spring (663) are respectively connected to the radial convex ring (662) and The upper lifting plate (645) is abutted against each other, and a pressing handle (670) is hinged on the upper lifting plate (645). One end of the pressing handle (670) is provided with a lifting portion (671), and the other end is provided with an operating portion (672). The lifting portion (671) is provided with a U-shaped notch (673) for the insertion column (660) to be inserted; the lifting portion (671) is located between the nut (661) and the upper lifting plate (645), so that when the operating portion (672) is pressed, the lifting portion (671) can lift the nut (661) and the insertion column (660) to disengage the insertion column (660) from the socket (614).

9. The multifunctional drying machine according to claim 2, characterized in that: It also includes a circulating conveying device (800), wherein the circulating conveying device (800) is used to receive the material output from the material outlet (710) and convey the material back to the drying inner bin (200).

10. The multifunctional drying machine according to claim 1, characterized in that: The shell (100) is provided with a moisture removal port (223) corresponding to the hot air outlet channel (220).

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