Tea multi-layer hot air circulation drying device

Abstract

The present application relates to the technical field of tea processing, and provides a multi-layer hot air circulation drying device for tea leaves, which comprises a drying cabinet body serving as a working area for drying tea leaves, a plurality of drying racks for placing tea leaves being installed in the drying cabinet body, a front sealing cabinet cover being installed on the front side of the drying cabinet body, a shell being vertically slid on the rear side of the drying cabinet body through an electric guide rail, a feeding assembly being used to deliver tea leaves to the drying racks, and a rear sealing cabinet cover being fixedly connected to the top side of the shell and used to seal the rear side of the shell. The fermented tea can be directly subjected to hot air circulation drying after being pressed into a shape in a softened state without manual transfer of materials or replacement of equipment. The integrated design reduces intermediate transfer links, reduces labor cost and material loss, significantly improves the production efficiency of the fermented tea, avoids damage and deformation of the tea cakes during the transfer process, and ensures the stability of the appearance quality of the products.

Description

Technical Field

[0001] This invention relates to the field of tea processing technology, specifically to a multi-layer hot air circulating drying device for tea. Background Technology

[0002] Fermented tea refers to any tea that undergoes a fermentation process during its production. Fermentation is the process by which tea leaves undergo enzymatic oxidation to form dark-colored substances such as theaflavins and thearubigins. Fermentation typically takes place in specialized rooms with controlled temperature and humidity. Many factors influence fermentation, including temperature, humidity, and the moisture content of the leaves. Traditionally, fermented tea is made by withering, rolling, fermenting, and drying tea buds and leaves to create raw tea, which is then further refined. Fermented tea can be categorized into lightly fermented tea, semi-fermented tea, fully fermented tea, and post-fermented tea. Fermented tea is believed to have beneficial effects on the stomach and intestines, primarily because the chemical substances within the tea leaves undergo transformation during fermentation, making the tea milder and less irritating to the digestive system. Furthermore, fermented tea is said to regulate blood lipids and blood sugar, and accelerate digestion.

[0003] After fermentation, fermented tea needs to be dried at high temperatures to rapidly deactivate the oxidases in the tea leaves, forcibly stopping the fermentation process and fixing the color, aroma, and flavor of the tea. Existing equipment cannot integrate tea pressing and drying. Fermented tea is often made into tea bricks or cakes for preservation, but this process requires cumbersome steps of drying, pressing, and cutting, resulting in low production efficiency. Therefore, a multi-layer hot air circulating drying device for tea is needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multi-layer hot air circulating drying device for tea, which solves the problem that existing equipment cannot achieve integrated operation of tea pressing and drying, and that fermented tea often requires cumbersome processes of drying, pressing, and cutting, resulting in low production efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A multi-layer hot air circulating drying device for tea includes:

[0007] The drying cabinet serves as the working area for drying tea leaves. Inside, there are multiple drying racks for placing tea leaves. A front sealing cabinet cover is installed on the front side of the drying cabinet. A housing slides vertically on the rear side of the drying cabinet via an electric guide rail. The housing delivers tea leaves to the drying racks via a feeding assembly. A rear sealing cabinet cover for sealing the rear side of the housing is fixedly connected to the top side of the housing.

[0008] The guide base is fixedly connected to the inside of the housing, and a turntable is rotatably connected to the top side. Multiple pressing cylinders for placing tea leaves are installed on the outer periphery of the turntable. One of the pressing cylinders is pressed by the pressing component on the top side to press the tea leaves inside into a suitable shape for subsequent drying and one-click forming.

[0009] The feed cylinder is located inside the housing, with its input end penetrating the top side of the outer wall of the housing. The output end of the feed cylinder is located on the top side of another pressing cylinder, and a feeding auger for conveying materials is rotatably connected inside the feed cylinder. The output end of the feed cylinder is controlled by a closing valve to discharge materials.

[0010] The frame is located inside the shell. Inside the frame, a power distribution component driven by a motor is installed. One end of the power distribution component is connected to the turntable through a rotating rod and two sets of meshing bevel gears. The other end of the power distribution component is equipped with a rotating rod. One end of the frame is rotatably connected to a reciprocating screw for driving the pressing component to move up and down. The rotating rod, the reciprocating screw, and the feeding auger are connected by a synchronous pulley and synchronous belt.

[0011] The sliding frame slides horizontally on the inner wall of the housing. The sliding frame is driven to move by an electric push rod. One end of the sliding frame controls the opening and closing of the closing valve, and the other end of the sliding frame controls the switching of the power distribution component.

[0012] Preferably, the pressing cylinder includes a pressing cavity fixedly connected to the outer periphery of the guide base, a conical head sliding vertically at the middle of the inner side of the pressing cavity, and ejector plates sliding vertically at both ends of the inner outer periphery of the pressing cavity, the top of the conical head being conical in shape.

[0013] Preferably, the inner and outer circumferences of the inner wall of the guide base are provided with guide grooves, the bottom end of the ejector plate slides against the guide groove through a protrusion, the bottom side of the inner wall of the guide base is provided with a guide protrusion, and the bottom side of the conical head slides against the guide protrusion.

[0014] Preferably, the pressing assembly includes a pressing head that slides vertically on one side of the frame. One end of the pressing head is sleeved on the outer wall of the reciprocating lead screw. A conical cavity is formed in the middle of the other end of the pressing head. Multiple actuating heads slide horizontally on the outer periphery of the conical cavity. The bottom end of each actuating head is connected to a traction head through an oblique guide groove. The traction head slides vertically inside the pressing head through a spring. A pressure plate is fixedly connected to the bottom side of the multiple traction heads. The pressure plate is located on the bottom side of the other end of the pressing head.

[0015] Preferably, the closing valve includes two closing valve plates that slide horizontally at the bottom output end of the feed cylinder. The two closing valve plates are horizontally symmetrical. A sliding head slides vertically on the outer wall of the feed cylinder. The bottom end of the sliding head is connected to the closing valve plates through two connecting rods. The top side of the sliding head is connected to one end of the sliding frame through a connecting rod.

[0016] Preferably, the power distribution assembly includes four transmission gears rotatably connected inside the frame body. Two adjacent transmission gears mesh with each other, wherein a sliding shaft passes through the middle end of two transmission gears, and a meshing wheel is fixedly connected to the outer wall of the sliding shaft. A meshing disc is fixedly connected to the outer periphery of the adjacent side of two transmission gears, another transmission gear is connected to one of the sets of bevel gears, and the remaining transmission gear is fixedly connected to the bottom side of the rotating rod.

[0017] Preferably, the top side of the sliding shaft is connected to the drive end of the motor via a spline shaft and spline sleeve, and the bottom end of the sliding shaft is rotatably connected to a sliding sleeve. The sliding sleeve slides vertically on the bottom side of the frame and is connected to the other end of the sliding frame via a connecting rod.

[0018] Preferably, it also includes a pusher frame, which slides horizontally inside and is located on one side of one of the pressing chambers, and one side of the pusher frame is rotatably connected to the bottom end of one of the connecting rods.

[0019] Preferably, the feeding assembly includes a discharge port fixedly connected to the front end of the housing, a conveyor belt is installed on the front side of the discharge port, and a pusher is provided on the top side of the conveyor belt. The pusher is driven to move by an electric push rod to push the tea leaves onto the drying rack.

[0020] Preferably, it also includes a circulating heating fan, the input and output ends of which are connected to the air outlet and air inlet of the front sealed cabinet cover through insulation pipes, respectively.

[0021] Working principle: When drying fermented tea, while the fermented tea is still in a softened and plastic state, the fermented tea is first pressed and shaped. First, a sufficient amount of fermented tea is put into the feeding cylinder, and then the motor is started. The motor drives the sliding shaft to rotate through the spline shaft and spline sleeve. This causes the meshing wheel on the sliding shaft to drive the two transmission gears connected to the rotating rod two through the meshing disc. The transmission gears drive the feeding auger inside the feeding cylinder to rotate through the synchronous belt and synchronous pulley, thereby conveying the fermented tea leaves to the discharge point, so that the tea leaves fall into the pressing chamber on the bottom side. Then, the electric push rod pulls the sliding frame to move, causing the sliding frame to pull the connecting rod two and the connecting rod one respectively.

[0022] The second connecting rod, when pushed, will pull the sliding head upward, which in turn will pull the third connecting rod on both sides, causing the included angle of the third connecting rod on both sides to decrease, thereby pulling the closed valve plates on both sides connected to it to close and block the discharge;

[0023] The driven connecting rod pushes the sliding sleeve at its bottom to move, causing the sliding sleeve to move the connected meshing wheel downwards. This meshing wheel engages with the meshing disc on the transmission gear of the rotating rod, completing the output switch and driving the rotating rod to rotate. The rotating rod, through the meshing bevel gear, drives the turntable to rotate, transferring the pressing chamber containing tea leaves to the bottom of the pressing head. Then, the electric push rod drives the sliding frame to reset. After resetting, the rotating rod continues to drive, driving the reciprocating screw to rotate, causing the reciprocating screw to perform one reciprocating vertical displacement, allowing the pressing head to insert into the pressing chamber at the bottom and squeeze the tea leaves. The electric push rod then repeats the above operation, causing the turntable to rotate and transferring the squeezed tea leaves to the discharge port side. At this time, the ejector inside the pressing chamber... After being guided by the guide groove inside the guide base, the disc is lifted, pushing out the extruded tea cake. When the sliding frame transmission linkage three is pushed, the linkage three drives the push frame connected to it to move, causing the push frame to push the pressed tea cake to the discharge port. The tea cake slides along the discharge port onto the conveyor belt. With the transmission of the conveyor belt, the tea cake is arranged on the top side of the conveyor belt. After a certain number are arranged, the push frame driven by the electric push rod pushes a row of tea cakes to the drying rack of the drying cabinet parallel to the output port of the shell. Under the push of the next row of tea cakes, the drying rack is filled. After it is filled, the shell moves to the next layer under the transmission of the electric guide rail, and so on, until all the drying racks are filled with tea cakes.

[0024] During the pressing process of the tea cake, the conical head in the pressing chamber, which has been moved to the bottom of the pressing chamber, will be lifted by the guide protrusion inside the guide base. During the pressing process, the pressing head and the conical head are inserted into each other, causing the contact head inside the pressing head to be resisted, which in turn causes the contact head to move. The oblique guide groove on the contact head guides the pulling head connected to the pressure plate, causing the pressure plate to press down, further squeezing the tea leaves and pressing out a tea cake with a hollow center.

[0025] After the material is loaded, the rear sealing cabinet cover is completely closed on the back of the drying cabinet, thus creating a sealed state inside the drying cabinet. The circulating heating fan is then started, and the fan and heating pipe inside the circulating heating fan begin to work. Through the heat insulation pipe, a circulating hot air heating structure is formed with the drying cabinet, causing the tea cake inside the drying cabinet to begin to lose moisture and begin drying. The filter structure set inside the circulating heating fan filters out moisture and impurities in the circulating hot air, keeping the circulating sealed space dry. After heating and drying are completed, the front sealing cabinet cover is opened, and the tea cake is taken out to cool.

[0026] This invention provides a multi-layer hot air circulating drying device for tea. It has the following beneficial effects:

[0027] 1. This invention enables fermented tea to be directly dried by hot air circulation after being pressed and shaped in a softened state, without the need for manual material transfer or equipment replacement. The integrated design reduces intermediate transfer links, lowers labor costs and material losses, significantly improves the production efficiency of fermented tea, and avoids damage and deformation of tea cakes during transfer, ensuring the stability of product appearance quality.

[0028] 2. In the pressing process, the conical head is inserted into the pressing head, triggering the pressing plate to press down and forming a tea cake structure with a hollow center. This hollow structure increases the contact area between the tea and the hot air, allowing the hot air generated by the circulating heating fan to penetrate the inside of the tea cake, achieving synchronous and uniform drying inside and out, greatly shortening the drying time and reducing energy consumption.

[0029] 3. The present invention adopts a combination design of circulating heating fan and heat preservation pipe to circulate and reuse the hot air inside the drying cabinet. The front sealing cabinet cover and the rear sealing cabinet cover form a closed drying space, which effectively reduces heat loss and reduces energy consumption. Attached Figure Description

[0030] Figure 1 This is a perspective view of the present invention;

[0031] Figure 2 This is a schematic diagram of the rear structure of the present invention;

[0032] Figure 3 This is a schematic diagram showing the positions of the drying cabinet and the outer shell of the present invention;

[0033] Figure 4 This is a schematic diagram of the internal structure of the housing of the present invention;

[0034] Figure 5 This is a schematic diagram of the internal structure of the pressing cavity of the present invention;

[0035] Figure 6 This is a schematic diagram of the internal structure of the pressing head of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the turntable of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of the guide base of the present invention;

[0038] Figure 9 This is a schematic diagram of the structure of the guide base of the present invention. Figure 2 ;

[0039] Figure 10 This is a schematic diagram of the connection structure of the rotating rod II of the present invention;

[0040] Figure 11 This is a schematic diagram of the connection structure of the sliding frame of the present invention;

[0041] Figure 12 This is a schematic diagram of the structure of the sliding head of the present invention;

[0042] Figure 13 This is a schematic diagram showing the position of the feeding auger of the present invention;

[0043] Figure 14 This is a schematic diagram showing the positions of the discharge port and the turntable in this invention.

[0044] The components are as follows: 1. Drying cabinet; 2. Shell; 3. Guide base; 4. Turntable; 5. Pressing chamber; 6. Conical head; 7. Top plate; 8. Pressing head; 9. Touch head; 10. Pulling head; 11. Pressure plate; 12. Rotating rod one; 13. Frame; 14. Sliding shaft; 15. Engaging wheel; 16. Engaging plate; 17. Transmission gear; 18. Connecting rod one; 19. Reciprocating screw; 20. Sliding frame; 21. Connecting rod two; 22. Sliding head; 23. Connecting rod three; 24. Closing valve plate; 25. Feed cylinder; 26. Feeding auger; 27. Rotating rod two; 28. Pushing frame; 29. ​​Discharge port; 30. Conveyor belt; 31. Pushing frame; 32. Circulating heating fan; 33. Rear sealing cabinet cover; 34. Front sealing cabinet cover; 35. Sliding sleeve. Detailed Implementation

[0045] 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.

[0046] Example:

[0047] This invention provides a multi-layer hot air circulating drying device for tea, comprising:

[0048] Please see the appendix Figure 1 -Appendix Figure 3 The drying cabinet 1 serves as the working area for drying tea leaves. Inside, there are multiple drying racks for placing tea leaves. A front sealing cabinet cover 34 is installed on the front side of the drying cabinet 1. A housing 2 slides vertically on the rear side of the drying cabinet 1 via an electric guide rail. The housing 2 delivers tea leaves to the drying racks via a feeding assembly. A rear sealing cabinet cover 33 for sealing the rear side of the housing 2 is fixedly connected to the top side of the housing 2. The drying cabinet 1 also includes a circulating heating fan 32. The input and output ends of the circulating heating fan 32 are connected to the air outlet and air inlet of the front sealing cabinet cover 34 via heat insulation pipes, respectively.

[0049] Specifically, the drying cabinet 1, the front sealing cabinet cover 34, and the rear sealing cabinet cover 33 are all set with standard sealing structures to form a hot air circulation environment that supports low loss. The circulating heating fan 32 is composed of heating pipes, a fan, a filter structure that supports water vapor filtration and impurity filtration, and the infrastructure that supports the operation of the equipment to cooperate with the hot air circulation drying work. After the material is loaded, the rear sealing cabinet cover 33 is completely closed on the rear side of the drying cabinet 1, thus creating a sealed state inside the drying cabinet 1. The circulating heating fan 32 is started, and the fan and heating pipe inside the circulating heating fan 32 begin to work. Through the heat insulation pipe, a circulating hot air heating structure is formed with the drying cabinet 1, causing the tea cake inside the drying cabinet 1 to begin to lose moisture and begin drying. The filter structure set inside the circulating heating fan 32 filters out moisture and impurities in the circulating hot air, keeping the circulating sealed space dry. After heating and drying are completed, the front sealing cabinet cover 34 is opened, and the tea cake is taken out to cool. The tea cake has a hollow structure in the center, which increases the contact area with the hot air, thereby accelerating the drying process. By drying and dehydrating the fermented tea in its undried and softened state, it can be shaped for subsequent packaging, simplifying the production process of fermented tea and improving production efficiency.

[0050] Please see the appendix Figure 4 and attached Figure 7 The guide base 3 is fixedly connected to the inside of the housing 2, and the top side is rotatably connected to the turntable 4. Multiple pressing cylinders for placing tea leaves are installed on the outer periphery of the turntable 4. One of the pressing cylinders is pressed by the pressing component on the top side to press the tea leaves inside, which is used to press the fermented tea leaves into a suitable shape for subsequent drying and one-click forming work.

[0051] Please see the appendix Figure 5 -Appendix Figure 7 The pressing cylinder includes a pressing cavity 5 fixedly connected to the outer periphery of the guide base 3. A conical head 6 slides vertically at the middle of the interior of the pressing cavity 5, and ejector plates 7 slide vertically at both ends of the outer periphery of the interior of the pressing cavity 5. The top of the conical head 6 is conical. The pressing assembly includes a pressing head 8 that slides vertically on one side of the frame 13. One end of the pressing head 8 is sleeved on the outer wall of the reciprocating screw 19. A conical cavity is opened at the middle of the interior of the other end of the pressing head 8. Multiple actuating heads 9 slide horizontally on the outer periphery of the conical cavity. The bottom end of the actuating head 9 is connected to a traction head 10 through an oblique guide groove. The traction head 10 slides vertically inside the pressing head 8 through a spring. A pressure plate 11 is fixedly connected to the bottom side of the multiple traction heads 10. The pressure plate 11 is located on the bottom side of the other end of the pressing head 8.

[0052] Specifically, when the pressing head 8 is inserted into the pressing cavity 5 at the bottom and the tea leaves are squeezed, the conical head 6, which is displaced to the bottom of the pressing cavity 5, will be lifted by the guide protrusion inside the guide base 3. During the pressing process, the pressing head 8 and the conical head 6 are inserted into each other, causing the contact head 9 inside the pressing head 8 to be resisted, thereby causing the contact head 9 to be displaced. The inclined guide groove on the contact head 9 guides the traction head 10 connected to the pressure plate 11, causing the pressure plate 11 to press down and further squeeze the tea leaves, pressing out a tea cake with a hollow center. The tea leaves that have been squeezed are then transferred to the side of the discharge port 29. At this time, the ejector plate 7 inside the pressing cavity 5 is lifted after being guided by the guide groove opened inside the guide base 3, thereby ejecting the tea cake that has been squeezed out.

[0053] Please see the appendix Figure 12 and attached Figure 13 The feed cylinder 25 is located inside the housing 2. Its input end penetrates the top side of the outer wall of the housing 2. The output end of the feed cylinder 25 is located on the top side of another pressing cylinder. The feed cylinder 25 is rotatably connected to a feeding auger 26 for conveying materials. The output end of the feed cylinder 25 is controlled by a closing valve. The closing valve includes two closing valve plates 24 that slide horizontally on the bottom output end of the feed cylinder 25. The two closing valve plates 24 are horizontally symmetrical. A sliding head 22 slides vertically on the outer wall of the feed cylinder 25. The bottom end of the sliding head 22 is connected to the closing valve plate 24 through two connecting rods 23. The top side of the sliding head 22 is connected to one end of the sliding frame 20 through connecting rod 21.

[0054] Specifically, during the drying of fermented tea, while the fermented tea is still in a softened and plastic state, the fermented tea is first pressed and shaped. First, a sufficient amount of fermented tea is put into the feeding cylinder 25, and then the motor is started, causing the motor to drive the sliding shaft 14 to rotate through the spline shaft and spline sleeve. This causes the meshing wheel 15 on the sliding shaft 14 to drive the two transmission gears 17 connected to the rotating rod 27 through the meshing disc 16. The transmission gears 17 then drive the feeding auger 26 inside the feeding cylinder 25 to rotate through the synchronous belt and synchronous pulley, thereby conveying the fermented tea leaves to the discharge point, where the tea leaves fall into the pressing chamber 5 on the bottom side. Then, the electric push rod pulls the sliding frame 20 to move, causing the sliding frame 20 to pull the connecting rod 21 and the connecting rod 18 respectively. The pushed connecting rod 21 pulls the sliding head 22 upward, thereby pulling the connecting rods 3 on both sides, reducing the angle between the connecting rods 3 on both sides, and then pulling the closed valve plates 24 connected to them to close, blocking the discharge.

[0055] Please see the appendix Figure 10 -Appendix Figure 12The frame 13 is located inside the housing 2. A power distribution assembly driven by a motor is installed inside the frame 13. One end of the power distribution assembly is connected to the turntable 4 via a rotating rod 12 and two sets of meshing bevel gears. The other end of the power distribution assembly is equipped with a rotating rod 27. One end of the frame 13 is rotatably connected to a reciprocating screw 19 for driving the pressing assembly to reciprocate up and down. The rotating rod 27, the reciprocating screw 19, and the feeding auger 26 are connected by a synchronous pulley and synchronous belt. The power distribution assembly includes four transmission gears 17 rotatably connected inside the frame 13. Adjacent transmission gears 17 mesh with each other. A sliding shaft 14 passes through the middle of two transmission gears 17. A fixed connection is made to the outer wall of the sliding shaft 14. The meshing wheel 15 has meshing discs 16 fixedly connected to the outer periphery of two adjacent sides of the transmission gears 17. Another transmission gear 17 is connected to one of the bevel gears. The remaining transmission gear 17 is fixedly connected to the bottom side of the rotating rod 27. The top side of the sliding shaft 14 is connected to the drive end of the motor through a spline shaft and spline sleeve. The bottom end of the sliding shaft 14 is rotatably connected to a sliding sleeve 35. The sliding sleeve 35 slides vertically on the bottom side of the frame 13 and is connected to the other end of the sliding frame 20 through a connecting rod 18. The sliding frame 20 slides horizontally on the inner wall of the housing 2. The sliding frame 20 is driven to move by an electric push rod. One end of the sliding frame 20 controls the opening and closing of the closing valve, and the other end of the sliding frame 20 controls the switching of the power distribution component.

[0056] Specifically, the pushed connecting rod 18 pushes the sliding sleeve 35 at the bottom to move, causing the sliding sleeve 35 to drive the meshing wheel 15 connected to it to move downward. Through meshing with the meshing disc 16 on the transmission gear 17 that is driven by the rotating rod 12, the output is switched, driving the rotating rod 12 to rotate. The rotating rod 12 drives the turntable 4 to rotate through the meshing bevel gear, transferring the pressing chamber 5 containing tea leaves to the bottom side of the pressing head 8. Then, the electric push rod drives the sliding frame 20 to reset. After resetting, the rotating rod 27 continues to drive and drives the reciprocating screw 19 to rotate, causing the reciprocating screw 19 to perform a reciprocating vertical displacement, causing the pressing head 8 to insert into the pressing chamber 5 on the bottom side to squeeze the tea leaves. Then the electric push rod repeats the above operation until all the tea leaves are squeezed.

[0057] Please see the appendix Figure 3 Appendix Figure 4 and attached Figure 14 It also includes a pusher 28, which slides horizontally inside the housing 2 and is located on one side of one of the pressing chambers 5. One side of the pusher 28 is rotatably connected to the bottom end of one of the connecting rods 23. The feeding assembly includes a discharge port 29 fixedly connected to the front end of the housing 2. A conveyor belt 30 is installed on the front side of the discharge port 29. A pusher 31 is provided on the top side of the conveyor belt 30. The pusher 31 is driven to move by an electric push rod to push the tea leaves onto the drying rack.

[0058] Specifically, when the compressed tea leaves are transferred to the outlet 29, the ejector plate 7 inside the pressing chamber 5 is lifted after being guided by the guide groove inside the guide base 3, thus ejecting the compressed tea cake. When the sliding frame 20 is pushed by the transmission linkage 3 23, the linkage 3 23 drives the connected pusher 28 to move, causing the pusher 28 to push the compressed tea cake to the outlet 29. The tea cake slides along the outlet 29 onto the conveyor belt 30. With the transmission of the conveyor belt 30, the tea cake is arranged on the top side of the conveyor belt 30. After a certain number are arranged, the pusher 31 driven by the electric push rod pushes a row of tea cakes onto the drying rack of the drying cabinet 1, which is parallel to the output port of the housing 2. With the push of the next row of tea cakes, the drying rack is filled. After it is filled, the housing 2 moves to the next layer under the transmission of the electric guide rail, and so on, until all the drying racks are filled with tea cakes.

[0059] 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 multi-layer hot air circulating drying device for tea, characterized in that, include: The drying cabinet (1) serves as the working area for drying tea leaves. It is equipped with multiple drying racks for placing tea leaves. A front sealing cabinet cover (34) is installed on the front side of the drying cabinet (1). A housing (2) slides vertically on the rear side of the drying cabinet (1) via an electric guide rail. The housing (2) delivers tea leaves to the drying racks via a feeding assembly. A rear sealing cabinet cover (33) for sealing the rear side of the housing (2) is fixedly connected to the top side of the housing (2). The guide base (3) is fixedly connected to the inside of the housing (2), and a turntable (4) is rotatably connected to the top side. Multiple pressing cylinders for placing tea leaves are installed on the outer periphery of the turntable (4). One of the pressing cylinders is pressed by the pressing component on the top side to press the tea leaves inside, which is used to press the fermented tea leaves into a suitable shape for subsequent drying and one-click forming work. The feed cylinder (25) is located inside the housing (2), and its input end penetrates the top side of the outer wall of the housing (2). The output end of the feed cylinder (25) is located on the top side of another pressing cylinder. The feed cylinder (25) is rotatably connected to a feeding auger (26) for conveying materials. The output end of the feed cylinder (25) is controlled by a closing valve to discharge materials. The frame (13) is located inside the shell (2). A power distribution component driven by a motor is installed inside the frame (13). One end of the power distribution component is connected to the turntable (4) through a rotating rod (12) and two sets of meshing bevel gears. The other end of the power distribution component is equipped with a rotating rod (27). One end of the frame (13) is rotatably connected to a reciprocating screw (19) for driving the pressing component to move up and down. The rotating rod (27), the reciprocating screw (19), and the feeding auger (26) are connected by a synchronous pulley and synchronous belt. The sliding frame (20) slides horizontally on the inner wall of the housing (2). The sliding frame (20) is driven to move by an electric push rod. One end of the sliding frame (20) controls the opening and closing of the closing valve, and the other end of the sliding frame (20) controls the switching of the power distribution component.

2. The multi-layer hot air circulating drying device for tea according to claim 1, characterized in that, The pressing cylinder includes a pressing cavity (5) fixedly connected to the outer periphery of the guide base (3). The inner middle of the pressing cavity (5) is vertically slidable by a conical head (6). Both ends of the inner outer periphery of the pressing cavity (5) are vertically slidable by an ejector plate (7). The top of the conical head (6) is conical.

3. The multi-layer hot air circulating drying device for tea according to claim 2, characterized in that, The inner and outer circumferences of the inner wall of the guide base (3) are provided with guide grooves. The bottom end of the ejector plate (7) slides against the guide groove through the protrusion. The bottom side of the inner wall of the guide base (3) is provided with a guide protrusion. The bottom side of the conical head (6) slides against the guide protrusion.

4. The multi-layer hot air circulating drying device for tea according to claim 1, characterized in that, The pressing assembly includes a pressing head (8) that slides vertically on one side of the frame (13). One end of the pressing head (8) is sleeved on the outer wall of the reciprocating screw (19). A conical cavity is opened in the middle of the other end of the pressing head (8). Multiple actuating heads (9) slide horizontally on the outer periphery of the conical cavity. The bottom end of the actuating head (9) is connected to a traction head (10) through an oblique guide groove. The traction head (10) slides vertically inside the pressing head (8) through a spring. A pressure plate (11) is fixedly connected to the bottom side of the multiple traction heads (10). The pressure plate (11) is located on the bottom side of the other end of the pressing head (8).

5. The multi-layer hot air circulating drying device for tea according to claim 1, characterized in that, The closing valve includes two closing valve plates (24) that slide horizontally at the bottom output end of the feed cylinder (25). The two closing valve plates (24) are horizontally symmetrical. A sliding head (22) slides vertically on the outer wall of the feed cylinder (25). The bottom end of the sliding head (22) is connected to the closing valve plate (24) through two connecting rods (23). The top side of the sliding head (22) is connected to one end of the sliding frame (20) through connecting rod (21).

6. The multi-layer hot air circulating drying device for tea according to claim 1, characterized in that, The power distribution assembly includes four transmission gears (17) rotatably connected inside the frame (13). Two adjacent transmission gears (17) mesh with each other. A sliding shaft (14) passes through the middle of two transmission gears (17). A meshing wheel (15) is fixedly connected to the outer wall of the sliding shaft (14). A meshing disc (16) is fixedly connected to the outer periphery of the two transmission gears (17) on their adjacent sides. Another transmission gear (17) is connected to one of the bevel gears. The remaining transmission gear (17) is fixedly connected to the bottom side of the rotating rod (27).

7. A multi-layer hot air circulating drying device for tea according to claim 6, characterized in that, The top side of the sliding shaft (14) is connected to the drive end of the motor through a spline shaft and spline sleeve. The bottom end of the sliding shaft (14) is rotatably connected to a sliding sleeve (35). The sliding sleeve (35) slides vertically on the bottom side of the frame (13) and is connected to the other end of the sliding frame (20) through a connecting rod (18).

8. A multi-layer hot air circulating drying device for tea according to any one of claims 2 or 5, characterized in that, It also includes a pusher (28), which slides horizontally inside (2) and is located on one side of one of the pressing chambers (5), and one side of the pusher (28) is rotatably connected to the bottom end of one of the connecting rods (23).

9. The multi-layer hot air circulating drying device for tea according to claim 1, characterized in that, The feeding assembly includes a discharge port (29) fixedly connected to the front end of the housing (2). A conveyor belt (30) is installed on the front side of the discharge port (29). A pusher (31) is provided on the top side of the conveyor belt (30). The pusher (31) is driven to move by an electric push rod to push the tea leaves onto the drying rack.

10. A multi-layer hot air circulating drying device for tea according to claim 1, characterized in that, It also includes a circulating heating fan (32), the input and output ends of which are connected to the air outlet and air inlet of the front sealed cabinet cover (34) through heat insulation pipes, respectively.

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