A tea fixing device with multi-layer heating drum

Abstract

This utility model relates to the field of tea processing technology, and provides a tea fixing device with a multi-layer heating drum. The device includes a drum body, a drive motor, an internal heating component, and an eccentric adjustment component. The drum body is a hollow cylindrical structure, and its inner wall is formed by two or more layers of coaxially stacked perforated mesh walls, forming an annular heat convection channel between each layer. The inner layer of the perforated mesh wall on the inner wall of the drum body constitutes a tea placement cavity, which accommodates and stirs the tea leaves. The drive motor is located on one side of the drum body and drives the drum body to rotate along its own axis. The internal heating component is mounted on the eccentric adjustment component, which is wedged into the drum body and adjusts the distance between the internal heating component and the inner wall of the drum. This utility model provides a new tea fixing device with advantages of high practicality and good fixing effect.

Description

Technical Field

[0001] This utility model relates to the field of tea processing technology, and in particular to a tea fixing device with multi-layer heating drum. Background Technology

[0002] In the processing of tea, especially in the preparation of green tea, oolong tea, and some semi-fermented teas, the fixation process is a crucial step. Its purpose is to destroy the activity of oxidases in fresh leaves, inhibit the enzymatic oxidation of tea polyphenols, reduce moisture content, and facilitate subsequent rolling and shaping as well as aroma generation. Existing drum-type tea fixation equipment generally consists of a drum body combined with external heating or a fixed internal heating structure.

[0003] For example, Chinese patent CN203369340U discloses a tea fixing machine drum, in which a cavity is provided between the outer and inner walls of the drum body, and an annular electric heating tube is installed in the cavity. Although this solution improves the temperature rise rate and heating uniformity to a certain extent, it still adopts a single-layer drum structure, and the heating path of the tea leaves in the drum, the distribution of the heat field, the material turning and the heat exchange efficiency are still not ideal.

[0004] Another typical example is a cylindrical tea fixing machine disclosed in Chinese patent CN218389640U, which proposes a three-section guide vane plate inside the drum and an inclined drum arrangement to accelerate the discharge speed and improve fixing efficiency. However, this solution mainly improves the axial propulsion of the tea leaves and the discharge speed, and still remains within the scope of a single wall layer + guide vane structure for the drum. It does not carry out structural innovation on the layering of the internal heat field of the drum, the layering and tumbling of materials, and the dynamic adjustment of the heat source position.

[0005] In addition, the following shortcomings still exist in the existing technology: 1. Most drum-type fixation equipment uses a single-layer cylinder structure or a single heating surface, which cannot form a zoned heat field and is difficult to meet the layered heating requirements of tea in different heat stages (such as preheating, main fixation, and aroma preservation). 2. The heat source or drum wall is fixed, and there is a lack of structured design for the heating distance of the tea leaves, the turning path of the tea leaves, and the spatial relationship between the heat receiver and the heating element. As a result, uneven heating, local overheating or insufficient heating are common problems. 3. Although the structure of the guide vane and inclined discharge has been improved, most of them focus on the efficiency of material conveying or turning, but do not achieve comprehensive structural innovation from the perspective of the internal structure of the drum, the relative movement between the heat source and the material and the change of thermal distance, so as to achieve variable heat source-material distance, heat zone stratification and material turning trajectory optimization.

[0006] This utility model was developed to address the common problems in the field, such as the simple structure of the drum wall layer, the fixed distance between the heat source and the material, and the unclear thermal field zoning. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of current methods by proposing a tea fixing device with multi-layer heating drums.

[0008] In order to overcome the shortcomings of the existing technology, the present invention adopts the following technical solution: A tea fixing device with a multi-layer heating drum includes a drum body, a drive motor, an internal heating component, and an eccentric adjustment component. The drum body is a hollow cylindrical structure, and its inner wall is formed by two or more layers of hollow mesh walls stacked coaxially, with an annular heat convection channel formed between each layer of hollow mesh walls. The inner perforated mesh wall of the inner wall of the drum body forms a tea-holding cavity, which contains and stirs the tea leaves. The drive motor is located on one side of the drum body and drives the drum body to rotate along its own axis. The internal heating component is disposed on the eccentric adjustment component, which is wedged into the drum body and adjusts the distance between the internal heating component and the inner wall of the drum.

[0009] Optionally, the inner perforated mesh wall of the inner wall of the roller body is provided with an opening and a sealing plate disposed on the opening. One side of the sealing plate is hinged to the outer wall of the outer perforated mesh, and the other side of the sealing plate is adsorbed and connected to the perforated mesh through a first magnetic attraction component.

[0010] Optionally, the internal heating component includes a heating element and a fixing seat, one end of the heating element is connected to the fixing seat, and the other end of the heating element extends toward the side away from the fixing seat.

[0011] Optionally, the eccentric adjustment component includes a support base, an eccentric drive motor, a drive plate, a limiting rod, a drive rod, and a vertical plate. The support base is disposed at one end of the roller body. The eccentric drive motor is disposed on the support base, and its output shaft is connected to one end of the drive rod. The other end of the drive rod is eccentrically connected to the drive plate. One end of the limiting rod is hinged to the plate body of the drive plate to form a first hinge portion. The other end of the limiting rod intersects with the vertical plate to form a second hinge portion. The fixed base is connected to the drive plate to form a heating part, and the heating part is wedged into the cavity of the roller body.

[0012] Optionally, the heating element is a ceramic heating element.

[0013] Optionally, the multi-layer perforated mesh wall of the roller body is made of stainless steel wire mesh, heat-resistant aluminum alloy plate or ceramic heat-conducting sheet.

[0014] Optionally, the inner perforated mesh wall of the roller body is provided with a discharge port.

[0015] Optionally, it also includes a discharge plate and a discharge seat. The discharge seat is disposed on one side of the roller body, and the bottom wall of the discharge plate is connected to the discharge seat, so that one end of the discharge plate extends into the inner cavity of the roller body and is disposed opposite to the discharge port, and receives the tea leaves after the fixation process after the discharge port is poured or rolled out.

[0016] Optionally, a collection bucket is provided on one side of the outlet seat to collect the tea leaves after the processing is complete.

[0017] The beneficial effects achieved by this utility model are: 1. By coordinating the forward and reverse rotation of the drum body and the drive motor, the tea leaves can be periodically turned and dispersed in the placement chamber, ensuring that the entire device forms a dynamic and uniform heat circulation during the fixation process, improving the heat exchange rate of the tea leaves and accelerating moisture evaporation. 2. Through the cooperation of the drum body and the internal heating components, the drum body can simultaneously achieve heat conduction and heat radiation transfer during rotation, ensuring that the entire device forms a uniform temperature distribution during the tea stir-frying process, improving the uniformity of heat treatment and preventing local overheating and scorching. 3. By cooperating with the eccentric adjustment component and the internal heating component, the internal heating component can move radially back and forth during the rotation of the drum, ensuring that the entire device can dynamically adjust the heating distance according to the moisture content of the tea, achieving flexible control of the heat intensity and preventing the tea from being overheated or underheated. 4. Through the cooperation of the drum body, drive motor, internal heating components and eccentric adjustment components, the device can achieve integrated coordinated action of rotational frying, dynamic heating, heat distance adjustment and uniform temperature fixation during operation. This ensures that the entire device forms a stable, uniform and self-adjustable thermal environment during the tea fixation process, so that the tea is fully heated, thoroughly fryed and the moisture evaporates evenly. This effectively improves fixation efficiency, reduces scorching, and improves the color and aroma quality of the tea. Attached Figure Description

[0018] The present invention can be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale, but rather the emphasis is on illustrating the principles of the embodiments. In different views, the same reference numerals designate the same parts.

[0019] Figure 1 This is a partial structural cross-sectional view of the present invention.

[0020] Figure 2 for Figure 1 Enlarged schematic diagram of part A in the middle.

[0021] Figure 3 for Figure 1 Enlarged schematic diagram of section B.

[0022] Figure 4 for Figure 1 Enlarged diagram of section C.

[0023] Figure 5 This is a side view of the eccentric adjustment component of this utility model.

[0024] Figure 6 This is a partial structural schematic diagram of the eccentric adjustment component and the internal heating component of this utility model.

[0025] Explanation of reference numerals in the attached drawings: 1. Roller body; 2. Hollowed-out mesh wall; 3. Tea placing cavity; 4. Drive gear; 5. Outlet plate; 6. Collection bucket; 7. Outlet seat; 8. Hollow inner cavity; 9. Drive motor; 10. Eccentric drive motor; 11. Support seat; 12. Drive plate; 13. Fixed seat; 14. Heating element; 15. Drive rod; 16. Limiting rod; 17. Vertical plate; 18. Connecting plate; 19. Output shaft; 20. First hinge part; 21. Frame; 22. Sealing plate; 23. First magnetic suction component; 24. Opening; 25. Second magnetic suction component; 26. Discharge port; 27. Baffle plate; 28. Spiral guide rib; 29. ​​Moving gear. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0027] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, this embodiment provides a tea fixing device with a multi-layer heating drum, including a drum body 1, a drive motor 9, an internal heating component, and an eccentric adjustment component. The drum body 1 is a hollow cylindrical structure, and its inner wall is formed by two or more layers of hollow mesh walls 2 stacked coaxially, with an annular heat convection channel formed between each layer of hollow mesh walls 2. The inner layer of the hollow mesh wall 2 of the inner wall of the roller body 1 forms a tea placing cavity 3, which contains and stirs the tea. The drive motor 9 is located on one side of the roller body 1 and drives the roller body 1 to rotate along its own axis. The internal heating component is disposed on the eccentric adjustment component, which is wedged into the drum body 1 and adjusts the distance between the internal heating component and the inner wall of the drum.

[0028] In this embodiment, the tea placing cavity 3 formed by at least two layers of hollow mesh walls 2 on the inner wall of the roller body 1 creates a multi-layer annular thermal field structure inside the roller body 1.

[0029] like Figure 1 As shown, the tea fixing device also includes a drive gear 4, which is nested around the outer periphery of the hollow mesh wall 2. At the same time, the output shaft 19 of the drive motor 9 meshes with the drive gear 4 through the moving gear 29, so that the roller body 1 and the hollow mesh wall 2 rotate synchronously.

[0030] When the drive motor 9 drives the drum 1 to rotate, the tea leaves are constantly turned, scattered and rubbed in the placement cavity formed by the inner hollow mesh wall 2, thus ensuring that the tea leaves are heated evenly.

[0031] In this embodiment, the drive motor 9 can control the drum body 1 to rotate alternately in the forward and reverse directions to cooperate with the reciprocating motion of the eccentric adjustment component and realize dynamic uniform heating and blanching cycle.

[0032] By coordinating the forward and reverse rotation of the drum 1 and the drive motor 9, the tea leaves can be periodically turned and dispersed in the placement chamber, ensuring that the entire device forms a dynamic and uniform heat circulation during the withering process, improving the heat exchange rate of the tea leaves and accelerating moisture evaporation.

[0033] Optionally, the inner layer of the hollow mesh wall 2 of the inner wall of the roller body 1 is provided with an opening 24 and a sealing plate 22 disposed on the opening 24. One side of the sealing plate 22 is hinged to the outer layer of the hollow mesh wall 2, and the other side of the sealing plate 22 is attracted to the hollow mesh wall 2 through a first magnetic attraction component 23.

[0034] The first magnetic suction component 23 includes a first magnetic suction base and a first magnetic suction element. The first magnetic suction base is disposed on the sealing plate 22, and the first magnetic suction element is disposed on the side of the hollow mesh wall 2 facing the sealing plate 22. At the same time, the first magnetic suction base and the first magnetic suction element are disposed opposite to each other to ensure that they can attract each other and ensure that the sealing plate 22 can close the opening 24.

[0035] Optionally, the internal heating component includes a heating element 14 and a fixing base 13. One end of the heating element 14 is connected to the fixing base 13, and the other end of the heating element 14 extends away from the fixing base 13. The heating element 14 is a ceramic heating element. The tea-fixing device also includes a power supply component and a central processing unit. The power supply component is electrically connected to the central processing unit, the drive motor 9, the internal heating component, and the eccentric adjustment component to supply power to the central processing unit, the drive motor 9, the heating element 14 of the internal heating component, and the eccentric drive motor 10 of the eccentric adjustment component. Additionally, the central processing unit is electrically connected to the central processing unit, the drive motor 9, the heating element 14 of the internal heating component, and the eccentric drive motor 10 of the eccentric adjustment component.

[0036] The heating element 14 is preferably a ceramic heating element, which has a positive temperature coefficient (PTC) characteristic and can automatically adjust the heating power according to the temperature to achieve constant temperature control. The heating surface of the ceramic heating element is uniform and the temperature rise is stable, avoiding the problem of local high temperature that is prone to occur in traditional electric heating wires or quartz tubes, thereby effectively preventing the tea leaves from scorching.

[0037] In this embodiment, the cooperation between the drum body 1 and the internal heating component enables the drum body 1 to simultaneously achieve heat conduction and heat radiation transfer during rotation, ensuring that the entire device forms a uniform temperature distribution during the tea stir-frying process, improving the uniformity of heat treatment and preventing local overheating and scorching.

[0038] Optionally, the eccentric adjustment component includes a support base 11, an eccentric drive motor 10, a drive plate 12, a limiting rod 16, a drive rod 15, and a vertical plate 17. The support base 11 is disposed at one end of the roller body 1. The eccentric drive motor 10 is disposed on the support base 11, and its output shaft 19 is connected to one end of the drive rod 15. The other end of the drive rod 15 is eccentrically connected to the drive plate 12. One end of the limiting rod 16 is hinged to the plate body of the drive plate 12 to form a first hinge part 20. The other end of the limiting rod 16 intersects with the vertical plate 17 to form a second hinge part. The fixed base 13 is connected to the drive plate 12 to form a heating part, and the heating part is wedged into the cavity of the roller body 1.

[0039] In this embodiment, as Figure 1 As shown, the end of the support base 11 away from the eccentric drive motor 10 is connected to the frame 21.

[0040] like Figure 1As shown, the eccentric adjustment component also includes a connecting plate 18, which is L-shaped. One end of the connecting plate 18 is wedged into the hollow inner cavity 8 of the roller body 1 and connected to the upright plate 17, so that the upright plate 17 can stably support the four limiting rods 16 and prevent the eccentric drive motor 10 from shifting or displacing during rotation. The other end of the connecting plate 18 is connected to the frame 21.

[0041] Preferably, when the drive plate rotates, it drives the heating element 14 to rotate in the hollow inner cavity 8 of the drum body, so that it does not come into contact with the inner wall of the hollow inner cavity 8.

[0042] In this embodiment, the frame 21 is disposed on one side of the roller body 1 to form a support base.

[0043] Specifically, one end of the horizontal section of the connecting plate 18 extends into the hollow inner cavity 8 of the roller body 1 and is fixedly connected to the vertical plate 17. Through this structure, the vertical plate 17 can stably support multiple limiting rods 16, thereby preventing the eccentric drive mechanism from shifting or displacing during rotation, and ensuring the stability and coaxiality of the movement path of the eccentric drive and the internal heating component.

[0044] By cooperating with the eccentric adjustment component and the internal heating component, the internal heating component can move radially back and forth during the rotation of the drum body 1, ensuring that the entire device can dynamically adjust the heating distance according to the moisture content of the tea leaves, achieving flexible control of the heat intensity and preventing the tea leaves from being overheated or underheated.

[0045] Optionally, the multi-layer perforated mesh wall 2 of the roller body 1 is made of stainless steel wire mesh, heat-resistant aluminum alloy plate, or ceramic heat-conducting sheet. At the same time, the inner layer aperture is smaller than the outer layer aperture to ensure that the heat flow is distributed layer by layer from the outside to the inside, so as to achieve a composite heating effect of outer layer heat conduction, middle layer convection, and inner layer radiation.

[0046] In this embodiment, the inner bottom wall of the multi-layer perforated mesh wall 2 is supported by supporting ribs (not shown in the figure), preventing the multi-layer perforated mesh wall 2 from collapsing inward and maintaining its posture. Simultaneously, after the tea leaves are loaded, it will not sink inward toward the axial side of the roller body 1. Furthermore, the supporting ribs are evenly spaced along the length of the multi-layer perforated mesh wall 2. Preferably, the supporting ribs are made of aluminum alloy with high thermal conductivity.

[0047] To facilitate the cleaning of tea residue, the inner perforated mesh wall 2 adopts a detachable connection structure. Its edges are connected to the roller body 1 by buckles or quick-release threads, which is convenient for disassembly and assembly and can be quickly maintained and cleaned during the tea processing interval.

[0048] In practical applications, the aperture of the outer perforated mesh wall 2 is preferably 6-8 mm, the aperture of the middle layer is 4-6 mm, and the aperture of the inner layer is 2-4 mm, or according to this progressive setting (when the outer perforated mesh wall 2 has three or more layers); through this aperture gradient design, it can ensure the graded diffusion of heat flow and prevent tea particles from overflowing from the inner sieve holes.

[0049] In this embodiment, the eccentric adjustment component drives the drive rod 15 and drive plate 12 to rotate eccentrically via the eccentric drive motor 10, causing the inner heating component to reciprocate relative to the inner wall of the drum, forming a periodic change in the heating path as it approaches and moves away from the drum. By dynamically adjusting the distance between the heating device and the inner wall of the drum, the heat intensity and radiation range of the tea can be changed, ensuring that tea at different moisture content stages is always within the optimal withering temperature range.

[0050] Furthermore, guide holes and ventilation grooves are provided between the multiple layers of perforated mesh walls 2 of the drum body 1, allowing hot air to circulate in a spiral shape along the drum axis, further enhancing the internal thermal uniformity. As the tea leaves rotate and tumble in the drum, they continuously pass through different temperature zones, thus forming a process path of gradual heating and progressive fixation.

[0051] This embodiment utilizes an eccentrically adjustable internal heating device and a multi-layered, perforated heat-dissipating drum structure to ensure more uniform heating of the tea leaves during the fixation process, significantly improving fixation efficiency and tea quality. Especially under continuous production conditions, the device achieves stable thermal field, adaptive temperature control, and anti-scorching protection, effectively improving fixation consistency and energy utilization.

[0052] Optionally, the inner perforated mesh wall 2 of the roller body 1 is provided with a discharge port 26.

[0053] Optionally, the tea fixing device also includes a discharge plate 5 and a discharge seat 7. The discharge seat 7 is disposed on one side of the roller body. The bottom wall of the discharge plate 5 is connected to the discharge seat 7, so that one end of the discharge plate 5 is suspended and extends into the inner cavity of the roller body 1 and is disposed opposite to the discharge port 26, and receives the fixed tea leaves that are poured or rolled out by the discharge port 26.

[0054] One end of the outlet seat 7 is connected to the bottom wall of the outlet plate 5, and the other end of the outlet seat 7 is connected to the frame 21.

[0055] Optionally, a collection bucket 6 is provided on one side of the outlet seat 7, and the collection bucket 6 collects the tea leaves after the tea leaves have been processed.

[0056] The guide plate 5 is inclined downwards along the direction of tea leaf movement at an angle of 15–35°, allowing the tea leaves to slide down automatically under gravity. The upper surface of the guide plate 5 may be provided with anti-slip ribs or guide ribs to guide the tea leaves downwards evenly and prevent them from scattering. The guide plate 5 and the guide seat 7 are detachably connected for easy cleaning of residual tea leaves or impurities.

[0057] The anti-slip ribs are arranged along the length of the guide plate 5, so that the tea leaves slide along the extension direction of the two anti-slip ribs.

[0058] The collection bucket 6 is made of heat-resistant stainless steel or aluminum alloy, and its top is equipped with a dust cover or protective baffle. The dust cover has ventilation holes or air ducts to facilitate the rapid dissipation of heat from the tea leaves after collection, preventing secondary oxidation caused by residual heat.

[0059] In addition, a baffle plate 27 and a second magnetic attraction component 25 are provided at the discharge port 26, such as Figure 3 As shown, one end of the partition plate 27 is hinged to the edge of the discharge port 26 of the inner hollow mesh wall 2 via a hinge rod. The second magnetic attraction component 25 is disposed on the contact end surface of the other end (the end away from the hinge rod) of the partition plate 27 and the hollow mesh wall 2, so that they can attract each other when they are close together.

[0060] The first magnetic suction component 23 includes a second magnetic suction base and a second magnetic suction element. The second magnetic suction base is disposed on the partition plate 27, and the second magnetic suction element is disposed on the side of the hollow mesh wall 2 facing the partition plate 27. At the same time, the second magnetic suction base and the second magnetic suction element are disposed opposite to each other to ensure that they can attract each other and to ensure that the partition plate 27 can seal the discharge port 26.

[0061] The inner perforated mesh wall 2 of the tea placing cavity 3 is provided with a number of spiral guide ribs 28 along the axial direction of the drum. The spiral guide ribs 28 are arranged at an inclination along the rotation direction of the drum, with a pitch of 60-120mm. They are used to gradually push the tea leaves to the discharge port 26 when the drum rotates in the forward direction, and to make the tea leaves flow back and disperse in the opposite direction when the drum rotates in the reverse direction.

[0062] Through the structure of the spiral guide ribs 28, when the drum rotates in both forward and reverse directions, the tea leaves can be fully stir-fried during the heating process and can automatically converge to the discharge port 26 when discharge is required, thus achieving directional discharge.

[0063] The spiral guide rib 28 is made of stainless steel or high-temperature resistant aluminum alloy, with a height of 10-20mm, and is fixed to the inner side of the inner hollow mesh wall 2 by spot welding or slotting.

[0064] By combining the spiral guide ribs 28 with the forward and reverse drive, the tea leaves can be gradually advanced or flow back and converge in the drum 1 according to a predetermined trajectory, ensuring that the entire device can achieve automatic material feeding and smooth material discharge at different stages, realizing automated withering and intelligent material discharge of tea leaves, and reducing the intensity of manual intervention.

[0065] The spiral guide ribs 28 form a material guiding trajectory between themselves and the inner wall of the drum, allowing the tea leaves to be slowly propelled along the axial direction as the drum rotates, thus achieving a four-stage cyclical motion during the withering process: rolling, stirring, heating, and converging.

[0066] Under the synergistic effect of the spiral guide ribs 28 and the internal heating components, when the drum body 1 is rotating in the forward direction, the tea leaves are gradually pushed to the discharge port 26 area by the guide ribs. At this time, the internal heating components are close to each other, which enhances heat transfer and promotes moisture evaporation. When the drum body 1 rotates in the reverse direction, the tea leaves are redistributed to different positions in the placement chamber. The internal heating components move away from the inner wall of the drum to reduce the heating intensity, thereby realizing the intermittent dynamic fixation cycle process.

[0067] When it is necessary to remove the tea leaves from the tea leaf placement chamber 3 (after fixing), ensure that the discharge port 26 is exactly above the discharge plate 5, and manually pull the baffle plate 27 to allow the tea leaves to be discharged from the discharge port 26 and smoothly slide into the collection bucket 6 for collection.

[0068] Specifically, when the drum body 1 is rotating forward, the spiral guide ribs 28 drive the tea leaves to slowly advance along the drum axis toward the discharge port 26. At this time, the eccentric adjustment component drives the internal heating component to approach the inner wall of the drum, forming a high heat intensity area, which is used to accelerate the evaporation of moisture and enzyme inactivation reaction in the tea leaves. When the drum 1 switches to reverse, the spiral guide ribs 28 guide in the opposite direction, the tea leaves are redispersed and move in the opposite direction, and the eccentric adjustment component drives the internal heating component away from the inner wall of the drum, forming a low heat intensity zone, so that the tea leaves can be slowly turned and cooled during the reverse stage, preventing local scorching.

[0069] During the alternation of forward and reverse rotation, the tea leaves form a periodic movement trajectory of continuous stirring, buffering, and uniform heating within the drum placement chamber. Each cycle includes three stages: enhanced heating, temperature balancing, and heat diffusion, thereby achieving dynamic uniform heating control and temperature field self-regulation during the tea fixation process.

[0070] Once the tea leaves reach the preset dryness or fixation degree, the drive motor 9 keeps the drum rotating in the forward direction, so that the tea leaves automatically gather at the discharge port 26 under the guidance of the spiral guide ribs 28. After the baffle plate 27 is opened, the tea leaves slide into the collection bucket 6 through the discharge plate 5 to complete the discharge.

[0071] In this embodiment, the forward and reverse rotation of the drum 1 operates in an alternating cyclical pattern, and its cycle can be adjusted according to the moisture content of the tea leaves, the fixation temperature, and the material loading. Preferably, in the initial stage when the moisture content is high, the forward rotation time of the drum 1 is 1-3 minutes, and the reverse rotation time is 30-60 seconds; in the middle and later stages when the moisture content is low, the forward rotation time can be appropriately extended to 3-5 minutes, and the reverse rotation time shortened to 20-30 seconds. Through this cycle setting, the tea leaves can obtain sufficient heat energy to evaporate moisture in the early stage of fixation, while in the middle and later stages, short-term reverse rotation achieves rapid and uniform heating and buffer cooling, thereby ensuring that the tea leaves are evenly fixated and have a bright color. When the fixation process is nearing completion, the drum 1 can maintain forward rotation for 2-3 minutes to achieve concentrated tea leaf discharge. At this time, the eccentric adjustment component is kept in a far-away position to prevent the tea leaves from continuing to be heated and charred during the discharge process.

[0072] In addition, the time interval between the forward and reverse rotations mentioned above is adaptively set and adjusted according to the type of tea, the harvest period, and the current weather humidity, so it will not be described in detail in this embodiment.

[0073] In this embodiment, through the cooperation of the drum body 1, drive motor 9, internal heating component and eccentric adjustment component, the device can achieve integrated coordinated action of rotational frying, dynamic heating, heat distance adjustment and uniform temperature fixation during operation. This ensures that the entire device forms a stable, uniform and self-adjustable thermal environment during the tea fixation process, so that the tea is fully heated, thoroughly fryed and the moisture evaporates evenly. This effectively improves fixation efficiency, reduces scorching, and improves the color and aroma quality of the tea.

[0074] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the protection scope of the present utility model. Therefore, all equivalent technical changes made based on the contents of the present utility model specification and drawings are included within the protection scope of the present utility model. Furthermore, the elements therein can be updated as technology develops.

Claims

1. A tea fixing device with multi-layer heating drums, characterized in that, It includes a drum body, a drive motor, an internal heating component, and an eccentric adjustment component. The drum body is a hollow cylindrical structure, and its inner wall is formed by two or more layers of hollow mesh walls stacked coaxially, with an annular heat convection channel formed between each layer of hollow mesh walls. The inner perforated mesh wall of the inner wall of the drum body forms a tea-holding cavity, which contains and stirs the tea leaves. The drive motor is located on one side of the drum body and drives the drum body to rotate along its own axis. The internal heating component is disposed on the eccentric adjustment component, which is wedged into the drum body and adjusts the distance between the internal heating component and the inner wall of the drum.

2. The tea fixing device with multi-layer heating drum as described in claim 1, characterized in that, The inner perforated mesh wall of the inner wall of the roller has an opening and a sealing plate set on the opening. One side of the sealing plate is hinged to the outer wall of the outer perforated mesh, and the other side of the sealing plate is attracted to the perforated mesh through a first magnetic attraction component.

3. The tea fixing device with multi-layer heating drum according to claim 2, characterized in that, The internal heating component includes a heating element and a fixed base. One end of the heating element is connected to the fixed base, and the other end of the heating element extends toward the side away from the fixed base.

4. The tea fixing device with multi-layer heating drum according to claim 3, characterized in that, The eccentric adjustment component includes a support base, an eccentric drive motor, a drive plate, a limiting rod, a drive rod, and a vertical plate. The support base is disposed at one end of the roller body. The eccentric drive motor is disposed on the support base, and its output shaft is connected to one end of the drive rod. The other end of the drive rod is eccentrically connected to the drive plate. One end of the limiting rod is hinged to the plate body of the drive plate to form a first hinge part, and the other end of the limiting rod intersects with the vertical plate to form a second hinge part. The fixed base is connected to the drive plate to form a heating part, and the heating part is wedged into the cavity of the roller body.

5. The tea fixing device with multi-layer heating drum according to claim 4, characterized in that, The heating element is a ceramic heating element.

6. The tea fixing device with multi-layer heating drum according to claim 4 or 5, characterized in that, The multi-layered perforated mesh wall of the roller body is made of stainless steel wire mesh, heat-resistant aluminum alloy plate or ceramic heat-conducting sheet.

7. The tea fixing device with multi-layer heating drum according to claim 6, characterized in that, The inner perforated mesh wall of the roller body is provided with a discharge port.

8. The tea fixing device with multi-layer heating drum according to claim 7, characterized in that, It also includes a discharge plate and a discharge seat. The discharge seat is disposed on one side of the roller body. The bottom wall of the discharge plate is connected to the discharge seat, so that one end of the discharge plate is suspended and extends into the inner cavity of the roller body and is disposed opposite to the discharge port, and receives the tea leaves after the fixation process after the discharge port is poured or rolled out.

9. The tea fixing device with multi-layer heating drum according to claim 8, characterized in that, A collection bucket is provided on one side of the outlet seat, and the collection bucket collects the tea leaves after they have been processed.

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