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CN-122015453-A - Tea uniform drying device with multilayer hot air supply and tea drying method

CN122015453ACN 122015453 ACN122015453 ACN 122015453ACN-122015453-A

Abstract

The invention discloses a tea uniform drying device and a tea drying method with multilayer hot air supply, and belongs to the technical field of tea processing equipment. The device comprises a shell, an air inlet cavity, a driving motor, a plurality of drying discs, an inner cylinder body, a mounting disc and an exhaust pipe, wherein a rotating shaft of the driving motor is in transmission connection with an inner gear, the drying discs are connected with the inner gear through a connecting shaft and an outer gear, a reset spring is arranged at the edge of the inner gear, the inner cylinder body is fixed with the connecting shaft, a through hole is arranged on the outer wall, a top end is provided with a top rod, a lug on the bottom side of the mounting disc is matched with the top rod to drive the drying discs to move up and down, and the exhaust pipe is communicated with the inner cylinder body to form hot air supply. The drying method realizes uniform drying by alternately rotating cold air and hot air and alternately rotating a drying disc and turning materials in an up-and-down displacement manner. The invention solves the problems of uneven hot air flow distribution and uneven drying of the traditional device, improves the heat utilization rate and the drying efficiency, ensures the tea quality, has reasonable structure and stable operation, and is suitable for large-scale processing.

Inventors

  • FAN XIANQING
  • XU YUFANG

Assignees

  • 福建省兴旺茶业有限公司

Dates

Publication Date
20260512
Application Date
20260409

Claims (10)

  1. 1. The utility model provides a tea even drying device of hot-blast supply of multilayer, includes casing (100), inlet air cavity (101) set up casing (100) outside, with casing (100) intercommunication, its characterized in that, tea even drying device of hot-blast supply of multilayer still includes: the driving motor (10) is fixedly arranged at the bottom side of the shell (100), the output end is in transmission connection with a rotating shaft (11), the rotating shaft (11) extends into the inner side of the shell (100), and a plurality of internal gears (12) are in transmission connection with the rotating shaft (11); The drying device comprises a plurality of drying discs (20), a plurality of connecting shafts (21) fixedly arranged on the inner side of each drying disc (20), an external gear (22) fixedly connected with the inner end of each connecting shaft (21), and a fixing ring (24) fixedly connected with a shell (100) at the other end of each connecting shaft (21), wherein each drying disc (20) is in meshed transmission with the corresponding internal gear (12) through the corresponding connecting shaft (21) and the external gear (22), annular sliding plates (200) are respectively arranged on the top side and the bottom side of the edge of each drying disc (20), each drying disc (20) is clamped between the two annular sliding plates (200) and can circumferentially rotate relative to each annular sliding plate (200), and a plurality of reset springs (23) are respectively arranged on the outer side of each annular sliding plate (200), one end of each reset spring (23) is fixedly connected with the annular sliding plate (200), and the other end of each reset spring is fixedly connected with the shell (100) through the fixing ring (24), so that the drying discs (20) can axially rotate along with the annular sliding plates (200) under the action of the reset springs (23) and simultaneously maintain circumferential displacement; The inner cylinder body (30) is made of a high heat conduction metal material, is of an annular structure in cross section, is sleeved on the outer side of the inner gear (12), is fixedly connected with the connecting shaft (21), and is used for enabling the inner cylinder body (30) to synchronously rotate along with the drying disc (20), through holes (31) are uniformly formed in the outer wall of the inner cylinder body (30), and N ejector rods (32) are equidistantly arranged at the top end of the inner cylinder body (30), wherein N is more than or equal to 3; The drying device comprises a shell (100), an installation disc (40), a plurality of lugs (41) and a plurality of return springs (23), wherein the installation disc is fixedly arranged on the inner side of the shell (100) and is positioned on the top side of the inner cylinder body (30), is fixedly connected with the shell (100), is fixedly provided with the lugs (41) with N arc surfaces on the bottom side of the installation disc (40), the N lugs (41) and the N ejector rods (32) are alternately arranged, the N lugs (41) and the N ejector rods (32) are arranged on the same circumference, the lugs (41) are used for sequentially driving the inner cylinder body (30) and the ejector rods (32) to rotate when the drying disc (20) rotates, so that when the lugs (41) are contacted with the ejector rods (32), the ejector rods (32) are pushed to drive the inner cylinder body (30) and the drying disc (20) to axially move downwards, and after the ejector rods (32) cross the lugs (41) and under the elastic return action of the return springs (23), the inner cylinder body (30) and the drying disc (20) are driven to return upwards; An exhaust pipe (102) which is arranged on the top side of the shell (100) and is communicated with the inner cylinder (30); The tea even drying device with multilayer hot air supply is formed from an annular cavity between the air inlet cavity (101), the shell (100) and the inner cylinder body (30), and is provided with a plurality of layers of hot air supply channels from the inside of the air inlet cavity (101), the through holes (31) of the inner cylinder body (30) to the exhaust pipe (102).
  2. 2. The multilayer hot air fed tea uniform drying device according to claim 1, wherein the cross-sectional outer diameter of the inner cylinder (30) is less than 1/6 of the diameter of the drying pan (20).
  3. 3. The multilayer hot air-fed tea leaf uniform drying device according to claim 1, further comprising a damping spring (25), wherein the damping spring (25) is arranged on the inner side of the shell (100) and on the top side of the driving motor (10), and two ends of the damping spring are respectively connected with the shell (100) and the bottom layer of the drying disc (20).
  4. 4. The multi-layered hot air supply tea leaf uniform drying device according to claim 1, wherein the air inlet cavity (101) comprises two air inlet cavities symmetrically arranged at two sides of the shell (100).
  5. 5. The multilayer hot air supply tea leaf uniform drying device according to claim 3, further comprising a top deflector (50) and a plurality of bottom deflectors (51), wherein any top deflector (50) and any bottom deflector (51) are of a funnel-shaped structure and sleeved outside the inner cylinder (30), the inner side of the top deflector (50) is fixed on the inner cylinder (30), the outer side is in sliding connection with the inner wall of the shell (100), and any bottom deflector (51) is fixed on the bottom side of the drying disc (20).
  6. 6. The multi-layered hot air supply tea leaf uniform drying device according to claim 5, wherein the bottom side of the housing (100) is provided with a tapered structure, a drain pipe (103) is provided outside the housing (100), the drain pipe (103) is communicated with the inside of the housing (100), and the inner end surface thereof is provided on the top side of the bottom surface of the housing (100).
  7. 7. The multilayer hot air-fed tea uniform drying device according to claim 6, wherein a plurality of circular concentric baffles (60) are further fixed on the top side of the drying tray (20), and any one of the concentric baffles (60) is vertically connected with the drying tray (20); The novel drying device is characterized in that a horizontal partition plate (61) is arranged above the concentric partition plate (60), a gap is reserved between the horizontal partition plate (61) and the concentric partition plate (60), the outer side edge of the horizontal partition plate (61) is fixedly connected with the inner side wall of the shell (100), a plurality of hinged supports (62) are arranged on the bottom side of the horizontal partition plate (61), connecting rods (63) are hinged to the bottom side of any hinged support (62), and the connecting rods (63) are arranged between two adjacent concentric partition plates (60) and are obliquely arranged and are in contact with the drying disc (20).
  8. 8. A tea leaf drying method applied to the multilayer hot air supply tea leaf uniform drying device as claimed in claim 7, characterized in that the method comprises the following steps: s1, feeding preparation, namely uniformly paving tea leaves to be dried on a plurality of drying trays (20) of a drying device, controlling tea leaves between adjacent concentric partition plates (60) to be paved in a consistent thickness, and enabling the tea leaves not to cover a connecting shaft (21), an external gear (22), a hinged support (62) and a connecting rod (63) structure on the drying trays (20); S2, hot air and cold air are supplied to form two symmetrical air inlet cavities (101) of the drying device respectively serving as a hot air cavity and a cold air cavity, the hot air cavity is started to introduce hot air into the shell (100), after being guided by a top guide plate (50) and a bottom guide plate (51), the hot air uniformly diffuses to each layer of drying disc (20) along an annular cavity between the shell (100) and the inner cylinder body (30) and fully contacts with tea leaves for heat exchange, then enters the inner cylinder body (30) through a through hole (31) on the outer wall of the inner cylinder body (30) and is discharged through an exhaust pipe (102), the hot air cavity is closed after the hot air supply is completed, the cold air cavity is started to introduce cold air, and the cold air flows flow flows according to the same path as the hot air flow to realize cold air and cold air alternate supply; S3, alternately rotating, drying and jumping, namely starting a driving motor (10), setting intermittent rotation time of a rotating shaft (11), controlling the rotating shaft (11) to drive a plurality of internal gears (12), a drying disc (20) and an inner cylinder body (30) to synchronously rotate, stopping rotating after rotating for preset time, starting hot air supply at the moment, enabling tea leaves on the drying disc (20) to be dried by hot air in a static state, closing hot air after the hot air drying is finished, starting cold air supply again, simultaneously restarting the rotating shaft (11) to continuously rotate, enabling the tea leaves to be dried by cold air in a rotating state, and realizing a mode of alternately drying the cold air and the hot air; When the ejector rod (32) is contacted with the convex block (41) at the bottom side of the mounting disc (40), the convex block (41) generates extrusion acting force on the ejector rod (32) to drive the inner cylinder body (30) and the drying disc (20) to move downwards along the axial direction, after the ejector rod (32) passes over the convex block (41), the drying disc (20) is driven to return upwards under the elastic reset action of the reset spring (23) to form periodical axial up-down displacement, in the axial up-down displacement process, the connecting rod (63) at the bottom side of the horizontal partition plate (61) is matched with the up-down reciprocating motion of the drying disc (20) to turn and break up tea leaves, so as to prevent the local accumulation of the tea leaves, S4. Moisture and condensed water are discharged, wherein the moisture generated by the tea leaves in the drying process enters the inner cylinder body (30) along with the supplied air flow, and then is discharged out of the shell (100) through the exhaust pipe (102) at the top side of the shell (100) to be converged along the conical bottom side of the shell (100), and discharged through the drain pipe (103); S5, drying is completed, namely continuously executing the steps S2-S4, keeping a cold and hot alternating drying mode until the tea leaves are dried to a preset water content, and closing the driving motor (10) and the two air inlet cavities (101) to complete the drying of the tea leaves, wherein the temperature of hot air is 60-85 ℃ and the temperature of cold air is 15-25 ℃.
  9. 9. A tea leaf drying method according to claim 8, wherein, In the step S2, the wind speed of hot air introduced into the hot air cavity is controlled to be 1.2-2.0m/S; The air speed of the cold air cavity is consistent with the hot air speed; the air flow rate of the two air inlet cavities (101) is kept consistent; The hot air flows through the guide plates, uniformly flows through each layer of drying disc (20) along the annular cavity after being guided by the guide plates, and enters the inner cylinder body (30) through the through holes (31).
  10. 10. A tea leaf drying method according to claim 8, wherein, In the step S1, the tea laying thickness is controlled to be 2-5cm; In the step S3, the rotation time and the stop time of the rotating shaft (11) are set to be 10-15min alternately, the rotation speed of the drying discs (20) is controlled to be 10-20r/min, the plurality of drying discs (20) synchronously rotate in the same direction, the up-and-down displacement amplitude of the drying discs (20) is buffered through the damping springs (25) in the rotation process, and the up-and-down displacement amplitude is controlled to be 0.5-1.5cm; the preset water content of the tea leaves in the step S5 is 5% -8%.

Description

Tea uniform drying device with multilayer hot air supply and tea drying method Technical Field The invention relates to the technical field of drying devices, in particular to a tea uniform drying device with multilayer hot air supply and a tea drying method. Background Tea leaf drying is a key process in the tea leaf processing process, and the drying uniformity and the drying efficiency of the tea leaf drying directly determine the color, aroma, taste and quality stability of tea leaves, so that the commodity value and market competitiveness of the tea leaves are affected. Along with the intelligent and large-scale development of the tea processing industry, the traditional tea drying equipment is difficult to meet the drying requirements of high quality and high efficiency, and various tea drying devices are continuously emerging. At present, a uniform heating control device (application number: 202411283039.9) for tea drying exists in the prior art, and the device relates to the technical field of tea drying, and comprises a drying box main body, wherein a compressor is installed on the upper surface of the drying box main body, a controller is installed at the front side of the compressor, a treatment frame is installed in the drying box main body, uniform drying mechanisms are arranged on the left side and the right side of the drying box main body, and a treatment oscillating mechanism is arranged in the drying box main body. The core design thought is that the flow mode of compressed air is converted into vortex rotating at high speed through the structural design of the vortex plate, so that air molecules are separated by friction and collision to generate energy so as to raise the temperature of the air molecules, and the air molecules are matched with the structural positions of a follow-up splitter plate and a vortex tube, so that hot air is ensured to directly and efficiently act on each layer of tea raw materials of a treatment frame, and meanwhile, the uniform diffusion and vertical penetration of the hot air are realized through the structural characteristics of the vortex tube, and the problems of heat attenuation and uneven distribution of the hot air in the descending process are solved in an attempt to improve the uniformity of tea drying. However, the closest prior art still has the defects in the practical application process, is influenced by the energy separation efficiency of the vortex tube and the fluctuation of the parameters of the airflow inlet, and the distribution of the airflow in the multi-layer drying rack is easy to deviate, so that the tea close to the inlet is excessively dried and the far-end drying is not thorough. Disclosure of Invention Aiming at the defects in the prior art, the application aims to provide a tea uniform drying device with multilayer hot air supply and a tea drying method, and aims to solve the problem of uneven distribution of hot air flow, wherein the uneven distribution of the hot air flow refers to the phenomenon that the hot air flow only acts on the surface layer of a tea stacking layer and is difficult to penetrate through a tea gap to enter the stacking inner layer in a static tea stacking state, and the inner layer tea is in a state of being closed, moist heat and difficult to reach air flow for a long time, so that obvious differences exist between the heating intensity and the dehydration speed of the inner layer tea and the surface layer tea, and further the phenomena of too fast surface layer drying and insufficient inner layer drying occur. Meanwhile, the tea particles are mutually overlapped and extruded to form a local compact area, hot air flows easily and rapidly flow along a surface layer path with smaller resistance to form an air flow short circuit, uniform and effective penetrating heat exchange cannot be formed inside a stacking layer, uneven drying is further aggravated, and finally the problems of large water content difference and inconsistent color and aroma quality of the same batch of tea are caused. Tea even drying device with multi-layer hot air supply The utility model provides a tea even drying device of hot-blast supply of multilayer, includes the casing, the cavity that admits air set up in casing one side outside, with the casing intercommunication, the tea even drying device of hot-blast supply of multilayer still includes: the driving motor is fixedly arranged at the bottom side of the shell, the output end is in transmission connection with a rotating shaft, the rotating shaft extends into the inner side of the shell, and a plurality of internal gears are fixedly connected on the rotating shaft in transmission; The inner side of each drying disc is fixedly provided with a connecting shaft, the inner end of the connecting shaft is fixedly connected with an external gear, the external gear is meshed with the internal gear, the drying discs form meshed transmission with the internal gear through the connecting sha