Material mixing mechanism and drying box comprising same

Abstract

The invention relates to the technical field of drying boxes, and particularly discloses a material mixing mechanism and a drying box comprising the same, the material mixing mechanism comprises a composite processing box, and also comprises a rotating column, one end of the rotating column is mounted on the bottom wall of the composite processing box, and the other end of the rotating column penetrates through the top wall of the composite processing box and extends to the outside; the driving assembly is installed on the combined machining box, and the driving assembly is connected with the rotating column and used for driving the rotating column to rotate; the crushing cutter assembly and the drying gas conveying unit are integrated through the rotating column, integrated operation of three functions can be achieved, materials do not need to be transferred between devices, and through the communication design of the first gas inlet and outlet assembly and the second gas inlet and outlet assembly of the drying gas conveying unit and a gas conveying channel of the crushing cutter assembly, the drying effect is improved. Drying gas can form gas flow penetrating through a material area through the first branch pipes in the circumferential direction of the rotating column and the gas conveying channel away from the rotating column, and hot gas fully permeates into materials.

Description

Technical Field

[0001] This invention belongs to the field of drying oven technology, specifically relating to a material mixing mechanism and a drying oven containing the mechanism. Background Technology

[0002] When using wet fruit and vegetable waste as a sample for microplastic testing, its composition is complex, containing multiple components such as fruit peels, pulp residue, and fibers. The pretreatment process for wet fruit and vegetable waste clearly requires: taking a well-mixed sample of wet fruit and vegetable waste, drying it at 60℃ to a constant weight, crushing the dried sample with a wooden stick, and then mixing it again for later use. During the pretreatment process, the waste needs to be transferred sequentially to a drying chamber, a crushing chamber, and a mixing chamber to complete the drying, crushing, and mixing operations respectively. The frequent transfer and switching between equipment is cumbersome. However, integrated equipment that combines drying, crushing, and mixing functions has now emerged. By setting up drying, crushing, and mixing structures within the same chamber, it is possible to complete the multi-step processing operation without transferring the sample.

[0003] A search revealed that CN110653244A discloses an on-site resource utilization equipment for wet waste and kitchen waste. This equipment relates to the reduction and on-site resource utilization of wet waste and kitchen waste, and includes a solenoid valve, a liquid tank, a Venturi injector, a feeding box, a crusher, a gearbox, a motor, a dryer, a controller, a gravity oil-water separator, a discharge box, a dryer, a dryer drive motor, and a blower. The outlet of the solenoid valve is connected to the inlet of the Venturi injector via a water pipe. The Venturi injector is installed on one side of the feeding box, and the mixed liquid outlet of the Venturi injector is connected to the feeding box via a pipe. The feeding box is installed on top of the crusher, and the crusher is installed on top of the dryer. The crusher's discharge port is connected to the dryer's inlet via a pipe. The dryer is installed in front of the dryer, and the dryer's material outlet is connected to the crusher's material inlet via a pipe.

[0004] The existing equipment's drying, pulverizing, and mixing structures are all independently configured, lacking a collaborative mechanism to achieve functional complementarity. Specifically, the heat generated by the drying structure during operation only remains on the surface of the chamber's interior. The pulverizing and mixing structures do not participate in the drying process, and the drying structure is also not involved during the pulverizing and mixing operations. This results in the inability to agitate or disperse the waste during drying, making it difficult for the heat to penetrate deep into the waste. Consequently, the waste is dried unevenly inside and out, causing the pre-treated samples to fail to meet the uniformity and dryness requirements for microplastic detection. Summary of the Invention

[0005] The purpose of this invention is to provide a material mixing mechanism and a drying box containing the mechanism, so as to solve the problem mentioned in the background art that the drying structure, crushing structure and mixing structure in the existing equipment are all set independently and separately, and there is no coordination mechanism among the three, so they cannot form a complementary function.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A material mixing mechanism includes: a composite processing box, and further includes: The rotating column is installed at one end on the bottom wall of the composite processing box and at the other end through the top wall of the composite processing box and extends to the outside. A drive assembly is mounted on the composite processing box and is connected to the rotating column for driving the rotating column to rotate. At least two shredder assemblies are mounted on a rotating column for shredding materials or mixtures. A drying gas conveying unit is installed on a rotating column. The drying gas conveying unit includes a first inlet / outlet gas assembly and a second inlet / outlet gas assembly. The crushing blade assembly is provided with a gas conveying channel. The second inlet / outlet gas assembly is connected to the gas conveying channel of the crushing blade assembly. The drying gas conveying unit is configured such that when the first inlet / outlet gas assembly conveys drying gas into the composite processing box, the second inlet / outlet gas assembly collects the gas in the composite processing box. The first inlet / outlet gas assembly and the second inlet / outlet gas assembly cooperate to form a gas circulation that runs through the material area.

[0007] In one embodiment, the top of the rotating column is provided with an annular groove, the top of the composite processing box is equipped with a support frame, and an annular rotating seat is fixedly installed on the support frame, the rotating seat being embedded in the groove.

[0008] In one embodiment, the bottom wall of the groove is provided with an installation groove, the groove has a cavity, the inner wall of the cavity has a plurality of installation holes, and the top wall of the cavity has a connection hole.

[0009] In one embodiment, the first air inlet / outlet assembly includes: The first conveying pipe is installed on the rotating seat, and one end of the first conveying pipe passes through the top of the rotating column and extends into the cavity; Several first branch pipes are installed in corresponding mounting holes, with one end of the first branch pipe extending into the first conveying pipe and the other end extending into the outside of the rotating column.

[0010] In one embodiment, the second air inlet / outlet assembly includes: The second conveying pipe has one end that passes through the rotating seat and extends into the groove. The second conveying pipe is located below the first conveying pipe. The second branch pipe is installed in the mounting slot and is connected to the air supply channel on the crusher assembly.

[0011] In one embodiment, the shredder assembly includes: retaining ring; Two support plates are mounted on a fixed ring and arranged in a circular array, and the gas delivery channel is set on the support plates; Two cutting heads are mounted on two support plates, respectively; When the rotating column rotates clockwise, the blades on the cutter head move toward the material to crush it; When the rotating column rotates counterclockwise, the support plate moves toward the material to mix the material.

[0012] In one embodiment, the support plate has a connecting groove at one end near the inner wall of the composite processing box, a filter is installed in the connecting groove, and the air supply channel is a through hole opened in the inner wall of the connecting groove, and the through hole is connected to the second branch pipe.

[0013] In one embodiment, the filter element is a hollow cylindrical structure with multiple filter holes on its surface.

[0014] In a preferred embodiment, a cleaning head is mounted on the support plate, the cleaning head contacts the surface of the filter element, and the filter element contacts the inner wall of the composite processing box. When the rotating column drives the support plate to rotate, the friction between the filter element and the inner wall of the composite processing box drives the filter element to rotate in the connecting groove, and the cleaning head cleans the impurities attached to the surface of the filter element.

[0015] In a preferred embodiment, the drying gas conveying unit further includes: A reversing valve is provided, and both the first and second delivery pipes are connected to the reversing valve. The drying gas conveying unit is configured such that when the first inlet / outlet gas assembly conveys drying gas into the composite processing box, the second inlet / outlet gas assembly collects the gas in the composite processing box; and when the second inlet / outlet gas assembly conveys drying gas into the composite processing box, the first inlet / outlet gas assembly collects the gas in the composite processing box.

[0016] In one embodiment, a filter screen is installed at the end of the first branch pipe away from the rotating column.

[0017] A drying oven, comprising a material mixing mechanism according to any one of the above.

[0018] Compared with the prior art, the beneficial effects of the present invention are: This invention integrates a rotary column with a crushing blade assembly and a drying gas conveying unit, enabling the integrated operation of three functions without the need for material transfer between equipment. Through the interconnected design of the first and second air inlet / outlet components of the drying gas conveying unit with the air conveying channel of the crushing blade assembly, the drying gas can form an airflow that penetrates the material area through the first branch pipe circumferentially around the rotary column and the air conveying channel away from the rotary column, allowing the hot gas to fully penetrate into the interior of the material.

[0019] The crushing and mixing functions are achieved by switching the direction of the crushing blade assembly with the rotating column. The crushing or mixing actions are synchronized during the drying process. The crushing can refine the particle size of the material to increase the contact area with hot air, and the mixing can turn the material over to eliminate dead corners of accumulation.

[0020] By controlling the airflow direction and switching the function of the crusher assembly through the reversing valve, the drying effect can be dynamically optimized according to the material processing status, ensuring uniform drying inside and outside the material. Through the real-time extraction and discharge of evaporated moisture from the material during the bidirectional airflow circulation process, combined with the continuous supply of drying gas, a low humidity environment can always be maintained in the composite processing box, improving the moisture absorption capacity of the drying gas and ensuring that the material quickly reaches the constant weight requirement. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a cross-sectional schematic diagram of the composite processing box of the present invention.

[0023] Figure 3 This is a partial enlarged cross-sectional view of the rotating column and rotating seat of the present invention.

[0024] Figure 4 This is a partial enlarged cross-sectional view of the rotating column, the first conveying pipe, and the second conveying pipe of the present invention.

[0025] Figure 5 This is a cross-sectional schematic diagram of the rotating column of the present invention.

[0026] Figure 6 This is a schematic diagram of the shredder assembly of the present invention.

[0027] Figure 7 This is a cross-sectional schematic diagram of the shredder assembly of the present invention.

[0028] In the picture: 10. Composite processing box; 11. Support frame; 20. Rotating column; 201. Groove; 202. Mounting groove; 203. Cavity; 204. Mounting hole; 21. Rotating seat; 22. First conveying pipe; 23. Second conveying pipe; 24. First branch pipe; 25. Second branch pipe; 26. Reversing valve; 30. Crusher assembly; 31. Retaining ring; 32. Support plate; 33. Blade head; 34. Filter element; 35. Cleaning head; 36. Connecting groove; 37. Through hole; 40. Drive assembly. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figures 1-7 A material mixing mechanism, comprising: a composite processing box 10, and further comprising: The rotating column 20 is installed at one end on the bottom wall of the composite processing box 10, and at the other end it penetrates the top wall of the composite processing box 10 and extends to the outside. The drive assembly 40 is mounted on the composite processing box 10. The drive assembly 40 is connected to the rotating column 20 and is used to drive the rotating column 20 to rotate. At least two crushing blade assemblies 30 are mounted on a rotating column 20 for crushing materials or mixtures; A drying gas conveying unit is installed on the rotating column 20. The drying gas conveying unit includes a first inlet / outlet gas assembly and a second inlet / outlet gas assembly. The crushing blade assembly 30 is provided with a gas conveying channel. The second inlet / outlet gas assembly is connected to the gas conveying channel of the crushing blade assembly 30. The drying gas conveying unit is configured such that when the first inlet / outlet gas assembly conveys drying gas into the composite processing box 10, the second inlet / outlet gas assembly collects the gas in the composite processing box 10. The first inlet / outlet gas assembly and the second inlet / outlet gas assembly cooperate to form a gas circulation that runs through the material area.

[0031] In the above technical solution, the rotating column 20 integrates the crushing blade assembly 30 and the drying gas conveying unit, eliminating the material transfer steps between different devices and improving operational convenience. The first and second inlet and outlet components of the drying gas conveying unit work together to form a gas circulation that runs through the material area. Combined with the gas conveying channel of the crushing blade assembly 30, the drying gas can penetrate deep into the material. At the same time, the crushing blade assembly 30 can switch the rotation direction to achieve crushing and mixing functions. During crushing, the particle size of the material is refined to facilitate hot gas penetration. During mixing, the material is turned over to further enhance the contact with the drying gas, improving drying efficiency and uniformity, and ensuring that the pre-treated material meets the requirements of dryness and uniformity for testing.

[0032] Specifically, when the first air inlet / outlet assembly delivers drying gas into the composite processing box 10, the second air inlet / outlet assembly collects the gas in the box through the air delivery channel of the crusher assembly 30. Utilizing the distance between the end of the crusher assembly 30 and the outer wall of the rotating column 20, the gas flows from the inside to the inside. After the first air inlet / outlet assembly blows out the hot gas required for drying, the gas flows from around the rotating column 20 to around the inner wall of the composite processing box 10, forming a circulating airflow that penetrates the material area.

[0033] In one embodiment, the top of the rotating column 20 is provided with an annular groove 201, the top of the composite processing box 10 is provided with a support frame 11, and an annular rotating seat 21 is fixedly installed on the support frame 11. The rotating seat 21 is embedded in the groove 201. The bottom wall of the groove 201 is provided with an installation groove 202, the groove 201 is provided with a cavity 203, the inner wall of the cavity 203 is provided with a plurality of installation holes 204, and the top wall of the cavity 203 is provided with a connection hole.

[0034] In the above technical solution, the annular groove 201 and the annular rotating seat 21 embedded therein form a rotational support cooperation. The rotating seat 21 is fixed to the top of the composite processing box 10 by the support frame 11, so that when the rotating column 20 rotates around its own axis, the rotating seat 21 always remains stationary. At this time, the first conveying pipe 22 always remains connected to the cavity 203, and the second conveying pipe 23 always remains connected to the groove 201. This avoids the pipe entanglement or sealing failure caused by the first and second inlet and outlet air components rotating synchronously with the rotating column 20. At the same time, the cavity 203, the mounting hole 204 and the bottom wall mounting groove 202 opened in the groove 201 provide installation layout space for the first and second inlet and outlet air components of the drying gas conveying unit, so as to achieve stable pipe connection and smooth airflow during the rotation of the rotating column 20.

[0035] In one embodiment, the first air inlet / outlet assembly includes: a first delivery pipe 22, mounted on a rotating base 21, with one end of the first delivery pipe 22 penetrating the top of the rotating column 20 and extending into the cavity 203; a plurality of first branch pipes 24, respectively installed in corresponding mounting holes 204, with one end of the first branch pipe 24 extending into the first delivery pipe 22 and the other end extending to the outside of the rotating column 20; and a filter screen installed at the end of the first branch pipe 24 away from the rotating column 20.

[0036] Specifically, by means of the nested engagement between the rotating seat 21 and the groove 201 of the rotating column 20, the rotating seat 21 and the first delivery pipe 22 remain stationary, preventing the gas delivery main pipe from shaking or tangling when the rotating column 20 rotates, thus providing a fixed and stable access channel for gas delivery; the cavity 203 serves as a transfer and connection space between the first delivery pipe 22 and the first branch pipe 24, allowing the fixed first delivery pipe 22 to form a sealed and smooth airflow passage with the first branch pipe 24 that rotates with the rotating column 20; several first branch pipes 24 are installed in the mounting holes 20 on the inner wall of the cavity 203. Inside the 4, one end is connected to the first conveying pipe 22, and the other end extends to the outside of the rotating column 20. The layout of the mounting holes 204 allows the first branch pipe 24 to be evenly distributed around the circumference of the rotating column 20. When the rotating column 20 rotates, the first branch pipe 24 rotates synchronously with it, which can evenly convey the drying gas to different areas inside the composite processing box 10. The filter screen installed at the end of the first branch pipe 24 away from the rotating column 20 can intercept material debris, dust and other impurities during gas conveying or collection, preventing them from entering the branch pipe or the first conveying pipe 22 and causing blockage, thus ensuring the stability of the airflow circulation.

[0037] In one embodiment, the second air inlet / outlet assembly includes: a second delivery pipe 23, one end of which passes through the rotating seat 21 and extends into the groove 201, the second delivery pipe 23 being located below the first delivery pipe 22; and a second branch pipe 25, which is installed in the mounting groove 202 and communicates with the air supply channel on the crusher assembly 30.

[0038] In the above technical solution, the second conveying pipe 23, with the fixed property of the rotating seat 21, can remain stationary, just like the first conveying pipe 22, thus avoiding pipe entanglement caused by the rotation of the rotating column 20. The groove 201 provides a shared transmission space for the second conveying pipe 23 and the second branch pipe 25. Even when the rotating column 20 is rotating at high speed, the second conveying pipe 23 can still be connected to the second branch pipe 25 through the groove 201. The mounting groove 202 on the bottom wall of the groove 201 provides an installation space for the second branch pipe 25. Since the mounting groove 202 is opened on the groove 201 of the rotating column 20, the second branch pipe 25 can be stably fixed through the mounting groove 202 when it rotates synchronously with the rotating column 20. The design of its connection with the air conveying channel of the crushing blade assembly 30 allows the drying gas to be directly conveyed to the inside of the material through the air conveying channel, taking advantage of the layout of the crushing blade assembly 30 extending deep into the material area.

[0039] In one embodiment, the pulverizing blade assembly 30 includes: a fixed ring 31; two support plates 32 mounted on the fixed ring 31 and arranged in a circumferential array, with an air supply channel disposed on the support plates 32; and two blades 33 respectively mounted on the two support plates 32. When the rotating column 20 rotates clockwise, the blades on the blades 33 move toward the material to pulverize the material; when the rotating column 20 rotates counterclockwise, the support plates 32 move toward the material to mix the material.

[0040] Specifically, the fixing ring 31, as a connecting component, is stably installed on the rotating column 20, ensuring that the crushing blade assembly 30 rotates synchronously when the rotating column 20 rotates; the two support plates 32 are arranged in a circumferential array, which can cover a large material action area within the composite processing box 10. No separate crushing and mixing drive mechanism is required; the function can be switched simply by changing the direction of the rotating column 20. When rotating clockwise, the blade of the cutter head 33 faces the material, using the shearing force of the blade to efficiently crush the dried material, refining the particle size to increase the contact area with the drying gas; when rotating counterclockwise, the support plate 32 faces the material, using the pushing and scraping action of the support plate 32 to turn the material over, breaking the material's accumulation state, allowing the drying gas to penetrate deep into the material.

[0041] Crucially, the gas conveying channel on the support plate 32 is connected to the second inlet and outlet gas assembly, allowing the drying gas to penetrate deep into the material action area through the end of the support plate 32. During the crushing process, the refined material comes into full contact with the drying gas discharged from the gas conveying channel. During the mixing process, turning the material can drive the gas to flow within the material layer, preventing the gas from remaining on the surface, and ultimately achieving deep synergy between crushing, mixing and drying.

[0042] In one embodiment, a connecting groove 36 is provided at one end of the support plate 32 near the inner wall of the composite processing box 10. A filter element 34 is installed in the connecting groove 36. The air supply channel is a through hole 37 opened in the inner wall of the connecting groove 36, and the through hole 37 is connected to the second branch pipe 25. The filter element 34 is a hollow cylindrical structure with multiple filter holes on its surface. A cleaning head 35 is installed on the support plate 32. The cleaning head 35 contacts the surface of the filter element 34, and the filter element 34 contacts the inner wall of the composite processing box 10. When the rotating column 20 drives the support plate 32 to rotate, the friction between the filter element 34 and the inner wall of the composite processing box 10 drives the filter element 34 to rotate in the connecting groove 36, and the cleaning head 35 cleans the impurities attached to the surface of the filter element 34.

[0043] In a preferred embodiment, the drying gas delivery unit further includes a reversing valve 26, and the first delivery pipe 22 and the second delivery pipe 23 are both connected to the reversing valve 26; the drying gas delivery unit is configured such that when the first inlet / outlet gas assembly delivers drying gas into the composite processing box 10, the second inlet / outlet gas assembly collects the gas in the composite processing box 10; and when the second inlet / outlet gas assembly delivers drying gas into the composite processing box 10, the first inlet / outlet gas assembly collects the gas in the composite processing box 10.

[0044] In the above technical solution, the drying equipment is connected to the first conveying pipe 22 and the second conveying pipe 23 via a reversing valve 26. The reversing valve 26, as a control component for the airflow direction, is connected to the fixedly installed first conveying pipe 22 and second conveying pipe 23. The two airflow modes can be quickly switched simply by switching the valve core inside the valve. In the first mode, the first inlet and outlet air assembly uniformly conveys drying gas into the composite processing box 10 through the first branch pipe 24 distributed circumferentially through the rotating column 20. The airflow penetrates from the outside of the material to the inside. At the same time, the second inlet and outlet air assembly is supported by the crushing blade assembly 30 and the plate 3. The air supply channel on 2 draws in air, forming a through-flow airflow that delivers air from the inside and draws it in from the outside. If the rotating column 20 rotates clockwise to drive the crushing blade assembly 30 to crush the material, the fined material particles can fully contact the airflow, improving drying efficiency. In the second mode, the airflow direction is reversed. The second air inlet and outlet component delivers air precisely into the material through the air supply channel, while the first air inlet and outlet component draws air from the outside through the first branch pipe 24, forming a cycle of internal suction and external delivery. If the rotating column 20 rotates counterclockwise to mix the material, the turning of the material can drive the internal airflow to diffuse to the outside, eliminating the dead airflow caused by material accumulation.

[0045] Crucially, the airflow switching controlled by the reversing valve 26 can be coordinated with the function switching of the crusher assembly 30. For example, in the crushing stage, the internal feeding and external suction mode is used to enhance the contact between particles and airflow, and in the mixing stage, the internal suction and external feeding mode is used to promote airflow diffusion. Alternatively, the circulation mode can be dynamically switched according to the degree of material dryness to ensure uniform drying of the material inside and out.

[0046] Furthermore, the moisture evaporated from the material during the drying process will increase the humidity of the air inside the composite processing box 10. If moisture remains, it will reduce the moisture absorption capacity of the drying gas, leading to a decrease in drying efficiency. The drying gas delivery unit solves this problem through a bidirectional circulation design of the first and second inlet / outlet components. When the first inlet / outlet component delivers dry drying gas into the box, the second inlet / outlet component simultaneously draws air through the air delivery channel of the pulverizer assembly 30. At this time, the pulverizer assembly 30 can cooperate to perform a low-speed mixing action, turning the material to accelerate moisture evaporation. At the same time, the air delivery channel penetrates deep into the material, directly extracting the high-humidity moisture near the material and preventing moisture from accumulating on the material surface. When the airflow direction is switched, the second inlet / outlet component delivers dry gas, and the first inlet / outlet component extracts residual moisture in the box through the circumferentially distributed first branch pipe 24. This synchronous circulation mode ensures that the dry gas is in continuous contact with the material, and the evaporated moisture is extracted and discharged in real time. The moisture can be discharged through the exhaust pipe connected to the rear end of the reversing valve 26, thus maintaining a low-humidity environment inside the box.

[0047] The drive assembly 40 includes: a power source mounted on the composite processing box 10, a first transmission wheel mounted on the power shaft of the power source, and a second transmission wheel mounted on the rotating column 20. The second transmission wheel and the first transmission wheel are connected by a belt drive. The power source is a servo motor, or it can be a stepper motor.

[0048] Example 2: A drying oven, including the material mixing mechanism of Example 1.

[0049] The working principle and usage process of this invention are as follows: The wet waste of fruits and vegetables to be processed is placed into the composite processing box 10 and evenly spread. The drive assembly 40 is started, which drives the rotating column 20 to rotate around its own axis. Simultaneously, the drying gas conveying unit is started, and the reversing valve 26 is initially switched to the first airflow mode. The first conveying pipe 22 is connected to the drying gas source via the reversing valve 26. The drying gas is sequentially conveyed into the composite processing box 10 through the first conveying pipe 22, the cavity 203 of the groove 201 at the top of the rotating column 20, and several first branch pipes 24. The first branch pipes 24 move synchronously with the rotating column 20. The rotation ensures uniform circumferential distribution of the drying gas. Simultaneously, the second conveying pipe 23 connects to the extraction end via the reversing valve 26. The gas inside the composite processing box 10 is discharged sequentially through the gas delivery channel of the support plate 32 of the pulverizer assembly 30, the second branch pipe 25, the second conveying pipe 23, and the reversing valve 26, forming a circulating airflow with external suction and internal delivery. The filter screen at the end of the first branch pipe 24 intercepts material debris. Subsequently, the drive assembly 40 is controlled to rotate the rotating column 20 clockwise, driving the pulverizer assembly 30 to rotate clockwise. The blades of the cutter head 33 face the material and pulverize it. The refined material comes into full contact with the drying gas. Meanwhile, the filter element 34 at the end of the support plate 32 rotates within the connecting groove 36 due to friction with the inner wall of the composite processing box 10, and the cleaning head 35 cleans impurities from the surface of the filter element 34; when the material is crushed to the preset particle size, the control rotating column 20 switches to counterclockwise rotation, and the crushing blade assembly 30 rotates counterclockwise accordingly. The support plate 32 faces the material and pushes and scrapes it over. At the same time, the reversing valve 26 switches to the second airflow mode, and the second conveying pipe 23 is connected to the drying gas source through the reversing valve 26. The drying gas is sequentially conveyed to the inside of the material through the second conveying pipe 23, the second branch pipe 25, and the gas conveying channel. Pipe 22 is connected to the extraction end via reversing valve 26. The gas in the composite processing box 10 is discharged sequentially through the first branch pipe 24, cavity 203, first conveying pipe 22, and reversing valve 26, forming a circulating airflow that is drawn inward and delivered outward. Throughout the process, reversing valve 26 periodically switches the airflow mode according to the degree of dryness of the material, and synchronously cooperates with the rotating column 20 to alternately turn to achieve crushing and mixing. The moisture evaporated from the material is discharged in real time through the exhaust pipe at the rear end of reversing valve 26. After the material reaches constant weight and is crushed evenly, the drying gas conveying unit is turned off first, then the drive assembly 40 is turned off, and finally the processed material is taken out.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A material mixing mechanism, comprising a composite processing box, characterized in that, Also includes: The rotating column is installed at one end on the bottom wall of the composite processing box and at the other end through the top wall of the composite processing box and extends to the outside. A drive assembly is mounted on the composite processing box and is connected to the rotating column for driving the rotating column to rotate. At least two shredder assemblies are mounted on a rotating column for shredding materials or mixtures. A drying gas conveying unit is installed on a rotating column. The drying gas conveying unit includes a first inlet / outlet gas assembly and a second inlet / outlet gas assembly. The crushing blade assembly is provided with a gas conveying channel. The second inlet / outlet gas assembly is connected to the gas conveying channel of the crushing blade assembly. The drying gas conveying unit is configured such that when the first inlet / outlet gas assembly conveys drying gas into the composite processing box, the second inlet / outlet gas assembly collects the gas in the composite processing box. The first inlet / outlet gas assembly and the second inlet / outlet gas assembly cooperate to form a gas circulation that runs through the material area.

2. The material mixing mechanism according to claim 1, characterized in that: The top of the rotating column is provided with an annular groove, and the top of the composite processing box is equipped with a support frame. An annular rotating seat is fixedly installed on the support frame, and the rotating seat is embedded in the groove.

3. The material mixing mechanism according to claim 2, characterized in that: The bottom wall of the groove is provided with an installation groove, the groove has a cavity, the inner wall of the cavity has a plurality of installation holes, and the top wall of the cavity has a connection hole.

4. The material mixing mechanism according to claim 3, characterized in that: The first air inlet / outlet assembly includes: The first conveying pipe is installed on the rotating seat, and one end of the first conveying pipe passes through the top of the rotating column and extends into the cavity; Several first branch pipes are installed in corresponding mounting holes, with one end of the first branch pipe extending into the first conveying pipe and the other end extending into the outside of the rotating column.

5. The material mixing mechanism according to claim 4, characterized in that: The second air inlet / outlet assembly includes: The second conveying pipe has one end that passes through the rotating seat and extends into the groove. The second conveying pipe is located below the first conveying pipe. The second branch pipe is installed in the mounting slot and is connected to the air supply channel on the crusher assembly.

6. The material mixing mechanism according to claim 5, characterized in that: The shredder assembly includes: retaining ring; Two support plates are mounted on a fixed ring and arranged in a circular array, and the gas delivery channel is set on the support plates; Two cutting heads are mounted on two support plates, respectively; When the rotating column rotates clockwise, the blades on the cutter head move toward the material to crush it; When the rotating column rotates counterclockwise, the support plate moves toward the material to mix the material.

7. The material mixing mechanism according to claim 6, characterized in that: The support plate has a connecting groove at one end near the inner wall of the composite processing box. A filter element is installed in the connecting groove. The air supply channel is a through hole opened in the inner wall of the connecting groove, and the through hole is connected to the second branch pipe.

8. The material mixing mechanism according to claim 7, characterized in that: The filter element is a hollow cylindrical structure with multiple filter holes on its surface.

9. The material mixing mechanism according to claim 1, characterized in that: A cleaning head is installed on the support plate. The cleaning head contacts the surface of the filter element, and the filter element contacts the inner wall of the composite processing box. When the rotating column drives the support plate to rotate, the friction between the filter element and the inner wall of the composite processing box drives the filter element to rotate in the connecting groove. The cleaning head cleans the impurities attached to the surface of the filter element.

10. The material mixing mechanism according to claim 5, characterized in that: The drying gas conveying unit further includes: A reversing valve is provided, and both the first and second delivery pipes are connected to the reversing valve. The drying gas conveying unit is configured such that when the first inlet / outlet gas assembly conveys drying gas into the composite processing box, the second inlet / outlet gas assembly collects the gas in the composite processing box; and when the second inlet / outlet gas assembly conveys drying gas into the composite processing box, the first inlet / outlet gas assembly collects the gas in the composite processing box.

11. The material mixing mechanism according to claim 4, characterized in that: A filter screen is installed at the end of the first branch pipe away from the rotating column.

12. A drying oven, characterized in that, Includes the material mixing mechanism according to any one of claims 1-11.

Images