Automated black tea production system and method

Abstract

The application discloses an automatic black tea production system and method, and relates to the technical field of black tea production.The system comprises a drying cylinder and a bottom support installed at the bottom of the drying cylinder, and further comprises a turnover cylinder for containing tea leaves, wherein the turnover cylinder is rotatably installed on the inner side wall of the drying cylinder through a coaxially connected exhaust pipe, the exhaust pipe is used for connecting the turnover cylinder with the outside world, and the turnover cylinder is arranged eccentrically with the drying cylinder; a heating component is installed on the inner wall of the drying cylinder and used for heating the outer wall of the turnover cylinder; and a pressure sensor is installed in the drying cylinder and used for detecting the pressure change value of the exhaust pipe.The application controls the speed regulating assembly to reduce the rotating speed of the turnover cylinder through the pressure sensor, reduces the turnover rate of the tea leaves and the centrifugal effect on the tea leaves after the tea leaves gradually change from a wet state to a crisp state, slows down the turnover amplitude and turnover rate of the tea leaves, and reduces the breaking amount of the tea leaves.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of black tea production, in particular to an automatic black tea production system and method thereof. BACKGROUND

[0002] Black tea is a kind of tea made from tender leaves or buds of Camellia sinensis. It is made from fresh tea leaves through a series of processes such as withering, rolling, fermentation, and drying. It is called black tea because of its deep red color.

[0003] In the drying process, common drying methods include oven drying, hot air drying, and microwave drying. For example, Chinese Patent Publication No. CN112414048B discloses a black tea drying equipment. During the drying process of tea leaves, the hollow rotating rod swings left and right, and the hollow rotating rod rotates by meshing with the meshing teeth during the swinging process, thereby driving the hollow turning paddle to rotate and turning the tea leaves to improve the drying effect.

[0004] However, since the turning speed cannot be adjusted, the turning rate of the tea leaves does not change. In the actual drying process of tea leaves, as the tea leaves dry, the moisture gradually decreases, and the tea leaves become brittle. If the turning speed remains the same as the initial turning speed, it may cause damage to the tea leaves, resulting in an increase in the amount of broken tea leaves after drying and a decrease in the yield of good tea leaves. SUMMARY

[0005] The present application aims to provide an automatic black tea production system and method to solve at least one technical problem in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: an automatic black tea production system, comprising a drying cylinder and a bottom bracket installed at the bottom of the drying cylinder, further comprising:

[0007] A turning cylinder for holding tea leaves is rotatably installed on the inner side wall of the drying cylinder through a coaxially connected exhaust pipe. The exhaust pipe connects the turning cylinder with the outside world, and the turning cylinder is eccentrically arranged with the drying cylinder.

[0008] A heating component is installed on the inner wall of the drying cylinder for heating the outer wall of the turning cylinder.

[0009] A pressure sensor is installed in the drying cylinder, and the pressure sensor is used to detect the pressure change value of the exhaust pipe.

[0010] The speed regulating assembly is used to drive the rotation of the turning barrel, and when the pressure sensor detects that the pressure value borne by the exhaust pipe decreases to a predetermined value, the speed regulating assembly reduces the rotation speed of the turning barrel.

[0011] Preferably, the speed regulating assembly comprises a first gear set fixedly installed on the outer wall of the exhaust pipe, and the first gear set comprises two gears with different diameters.

[0012] Further comprising a first electric sliding block horizontally slidingly installed in the bottom support, and a first motor is installed on the first electric sliding block, and a second gear set is fixed on the output shaft of the first motor, and the second gear set is identical with the first gear set, and the positions of the two gears are opposite, and in the initial stage of drying, the large gear in the second gear set drives the small gear in the first gear set, and when the pressure sensor detects that the pressure value borne by the exhaust pipe decreases to a predetermined value, the pressure sensor controls the horizontal movement of the first electric sliding block, and makes the small gear in the second gear set drive the large gear in the first gear set, thereby completing the switching of the transmission ratio.

[0013] Preferably, the speed regulating assembly comprises two conical wheels slidingly installed on the outer wall of the exhaust pipe, the conical surfaces of the two conical wheels are opposite, and a tension spring is connected between the two conical wheels.

[0014] Further comprising a second electric sliding block vertically slidingly installed in the bottom support, and a second motor is installed on the second electric sliding block, and a transmission wheel is fixed on the output end of the second motor, and the transmission wheel is drivingly connected with the conical surfaces of the two conical wheels through a transmission belt, and when the pressure sensor detects that the pressure value borne by the exhaust pipe decreases to a predetermined value, the pressure sensor controls the vertical upward movement of the second electric sliding block.

[0015] Preferably, one of the exhaust pipes is composed of a first air feeding pipe connected to the outer wall of the turning barrel and a connecting shaft rotatably installed on the side wall of the drying barrel, a gas exchange box is fixed between the first air feeding pipe and the connecting shaft, the gas exchange box is in communication with the first air feeding pipe, a sliding member is slidingly installed on the inner wall of the gas exchange box, a top rod is fixedly penetrated into the sliding member, and the two ends of the top rod are penetrated out of the two sides of the gas exchange box and can intermittently contact the inner wall of the drying barrel with the rotation of the gas exchange box.

[0016] Air inlet channels are formed in the top rods located on the two sides of the sliding member, and one-way valves are installed in the air inlet channels to enable air to be one-way sucked into the gas exchange box, and one-way valves are installed in the first air feeding pipe to enable air to be one-way entered into the turning barrel.

[0017] Preferably, heat conducting wheels are rotatably connected to the two ends of the top rod, and the air inlets of the air inlet channels are opposite to the heat conducting wheels.

[0018] Preferably, one of the exhaust pipes is composed of a second air feeding pipe connected to the outer wall of the tumbling cylinder and a connecting shaft rotatably installed on the side wall of the drying cylinder, a piston cylinder is fixed between the second air feeding pipe and the connecting shaft, the second air feeding pipe is communicated with the piston cylinder, a piston block is slidably installed on the inner wall of the piston cylinder, a piston rod is fixed to the outer wall of the piston block away from the second air feeding pipe and protrudes out of the piston cylinder, the piston rod is in rolling contact with the inner wall of the drying cylinder, a spring is connected between the outer wall of the piston block away from the air suction passage and the inner wall of the piston cylinder, and the piston rod is provided with an air suction passage in the inside.

[0019] Preferably, the inner wall of the tumbling cylinder is provided with an inner conical surface, and the inner diameter of the inner conical surface gradually decreases away from the first air feeding pipe.

[0020] Preferably, the inner wall of the tumbling cylinder close to the exhaust pipe is provided with a separation cavity, and the separation cavity is provided with a step at the connection with the inner conical surface.

[0021] Preferably, the drying cylinder and the tumbling cylinder are both provided with an openable semicircular arc shell.

[0022] A method for processing black tea by using an automatic black tea production system, comprising the following steps:

[0023] S1, placing fermented black tea into the tumbling cylinder, and driving the tumbling cylinder to rotate by the speed regulating assembly to tumble the wet tea leaves in the tumbling cylinder;

[0024] S2, heating the outer wall of the tumbling cylinder by the heating component to dry the tea leaves in the tumbling cylinder, and continuously tumbling the tea leaves in the tumbling cylinder with the continuous rotation of the tumbling cylinder to make the drying degree more uniform;

[0025] S3, with the drying of the tea leaves, the water vapor in the tea leaves is discharged from the exhaust pipe to the outside of the tumbling cylinder and the drying cylinder, and with the loss of water, the weight of the tea leaves in the tumbling cylinder gradually decreases, and the pressure acting on the tumbling cylinder and the exhaust pipe also gradually decreases, when the pressure sensor detects that the pressure value of the exhaust pipe decreases to a predetermined value, at this time, the tea leaves gradually change from a wet state to a crisp state, then the pressure sensor controls the speed regulating assembly to reduce the rotation speed of the tumbling cylinder to reduce the tumbling rate of the tea leaves, and also reduces the centrifugal effect on the tea leaves, slows down the tumbling amplitude and tumbling rate of the tea leaves, and reduces the breaking amount of the tea leaves;

[0026] S4, turning off the heating component, and completing the remaining drying process by using the residual heat of the tumbling cylinder and the drying cylinder, then taking out the dried tea leaves from the tumbling cylinder, and refilling the tea leaves to be dried, then repeating the above steps again.

[0027] Compared with the prior art, the present application has the following advantages:

[0028] The present application controls the rotation speed of the turning barrel by the pressure sensor, and lowers the turning speed of the tea leaves after the tea leaves change from the wet state to the dry state, so as to reduce the centrifugal force on the tea leaves, slow down the turning range and speed of the tea leaves, and reduce the breaking amount of the tea leaves. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a perspective view of the drying barrel of the present application Figure 1 ;

[0030] Figure 2 is a right view of the present application

[0031] Figure 3 is a front view of the present application

[0032] Figure 4 is a perspective view of the drying barrel of the present application Figure 2 ;

[0033] Figure 5 is a structural schematic view of the first embodiment of the speed regulating assembly of the present application

[0034] Figure 6 is a sectional view along A-A in the present application Figure 5 ;

[0035] Figure 7 is a sectional view along B-B in the present application Figure 6 ;

[0036] Figure 8 is a structural schematic view of the second embodiment of the present application

[0037] Figure 9 is a structural schematic view of the second embodiment of the speed regulating assembly of the present application

[0038] Figure 10 is a perspective structural schematic view of the second embodiment of the speed regulating assembly of the present application

[0039] Figure 11 is a partial sectional view of the second embodiment of the speed regulating assembly of the present application

[0040] In the figure: 1, drying cylinder; 2, bottom support; 3, exhaust pipe; 4, turnover cylinder; 5, first air feeding pipe; 6, air exchange box; 7, sliding part; 8, ejector rod; 9, inner conical surface; 10, separation cavity; 11, air inlet channel; 12, heat conducting wheel; 13, piston cylinder; 14, piston block; 15, piston rod; 16, air suction channel; 17, spring; 18, heating component; 19, pressure sensor; 20, first electric sliding block; 21, first motor; 22, first gear set; 23, second gear set; 24, conical wheel; 25, second electric sliding block; 26, transmission wheel; 27, tension spring; 28, second motor; 29, second air feeding pipe. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0042] Please refer to Figures 1 to 11 The present application provides a technical solution: an automatic black tea production system, comprising a drying cylinder 1 and a bottom support 2 installed at the bottom of the drying cylinder 1, and further comprising:

[0043] A turnover cylinder 4 for containing tea leaves, which is rotatably installed on the inner side wall of the drying cylinder 1 through a coaxially connected exhaust pipe 3. The exhaust pipe 3 allows the turnover cylinder 4 to communicate with the outside, and the turnover cylinder 4 is eccentrically arranged with the drying cylinder 1;

[0044] A heating component 18, which is installed on the inner wall of the drying cylinder 1 and used for heating the outer wall of the turnover cylinder 4;

[0045] A pressure sensor 19 installed in the drying cylinder 1, which is used for detecting the pressure change value of the exhaust pipe 3;

[0046] A speed regulating assembly, which is used for driving the turnover cylinder 4 to rotate, and when the pressure sensor 19 detects that the pressure value of the exhaust pipe 3 decreases to a predetermined value, the speed regulating assembly reduces the rotation speed of the turnover cylinder 4.

[0047] When the automatic black tea production system is in use, the fermented black tea is put into the turnover cylinder 4, and the turnover cylinder 4 is driven to rotate by the speed regulating assembly, so as to turn over the wet tea leaves in the turnover cylinder 4;

[0048] At the same time, the outer wall of the turnover cylinder 4 is heated by the heating component 18, so as to perform a drying operation on the tea leaves in the turnover cylinder 4, and the tea leaves in the turnover cylinder 4 are continuously turned over with the continuous rotation of the turnover cylinder 4, so as to make the drying degree more uniform.

[0049] As the tea is dried, the water vapor inside is discharged from the exhaust pipe 3 to the turnover drum 4 and the drying drum 1 outside, and as the moisture is lost, the weight of the tea in the turnover drum 4 is gradually reduced, and the pressure on the turnover drum 4 and the exhaust pipe 3 is also gradually reduced. When the pressure sensor 19 detects that the pressure value on the exhaust pipe 3 is reduced to a predetermined value, at this time the tea is gradually changed from a wet state to a crisp state, and then the pressure sensor 19 controls the speed regulating assembly to reduce the rotation speed of the turnover drum 4, so as to reduce the turnover rate of the tea and also reduce the centrifugal effect on the tea, slow down the turnover amplitude and turnover rate of the tea, and reduce the amount of broken tea.

[0050] In one of the more preferred embodiments, an embodiment of a speed regulating assembly is provided, as shown in Figures 4-6 ;

[0051] The speed regulating assembly includes a first gear set 22 fixedly installed on the outer wall of the exhaust pipe 3, and the first gear set 22 includes two gears with different diameters;

[0052] It also includes a first electric sliding block 20 horizontally slidingly installed in the bottom support 2, and the first electric sliding block 20 is installed with a first motor 21, and the output shaft of the first motor 21 is fixed with a second gear set 23, which is the same as the first gear set 22, and the positions of the two gears are opposite. In the initial stage of drying, the large gear in the second gear set 23 is in transmission with the small gear in the first gear set 22, and when the pressure sensor 19 detects that the pressure value on the exhaust pipe 3 is reduced to a predetermined value, the pressure sensor 19 controls the first electric sliding block 20 to move horizontally and makes the small gear in the second gear set 23 in transmission with the large gear in the first gear set 22, to complete the switching of the transmission ratio.

[0053] In the initial stage of drying, since the tea has a high water content, the transmission mode of the large gear driving the small gear drives the exhaust pipe 3 and the turnover drum 4 to rotate rapidly in the early stage, so that the tea in the turnover drum 4 can be quickly turned over, and when it rotates to the top and falls under the action of gravity, the stacked tea will be fluffy, so that the water vapor generated by heating can be effectively discharged;

[0054] Then as the drying process proceeds, the moisture in the tea evaporates and is discharged from the exhaust pipe 3, at this time the tea gradually dries and the weight decreases, at this time the tea in the turnover cylinder 4 also reduces the pressure on the turnover cylinder 4 and the exhaust pipe 3, when the pressure sensor 19 detects that the pressure value of the exhaust pipe 3 decreases to a predetermined value, at this time it means that the tea has been dried to a certain extent, at this time it controls the first electric sliding block 20 to slide horizontally, and the small gear in the second gear set 23 is in transmission with the large gear in the first gear set 22, to complete the transmission ratio switching, so that the rotation speed of the exhaust pipe 3 and the turnover cylinder 4 is reduced, so as to slow down the turnover amplitude and turnover rate of the tea, so as to reduce the breaking amount of the tea.

[0055] In a second more preferred embodiment, a second embodiment of the speed regulating assembly is provided, which can be specifically referred to as Figures 9-11 ;

[0056] The speed regulating assembly comprises two conical wheels 24 slidingly installed on the outer wall of the exhaust pipe 3, the conical surfaces of the two conical wheels 24 are opposite, and a tension spring 27 is connected between the two conical wheels 24;

[0057] It also comprises a second electric sliding block 25 vertically slidingly installed in the bottom support 2, a second motor 28 is installed on the second electric sliding block 25, a transmission wheel 26 is fixed on the output end of the second motor 28, and the transmission wheel 26 is in transmission connection with the conical surfaces of the two conical wheels 24 through a transmission belt, when the pressure sensor 19 detects that the pressure value of the exhaust pipe 3 decreases to a predetermined value, the pressure sensor 19 controls the second electric sliding block 25 to vertically move upward.

[0058] In this embodiment, in the initial stage of drying, the transmission wheel 26 will drive the two conical wheels 24 to rotate through the transmission belt under the drive of the second motor 28, thereby driving the exhaust pipe 3 and the turnover cylinder 4 to rotate together;

[0059] When the pressure sensor 19 detects that the pressure value of the exhaust pipe 3 decreases to a predetermined value, the pressure sensor 19 controls the second electric sliding block 25 to vertically move upward at this time, at this time the transmission belt will gradually loosen, and the two conical wheels 24 will approach each other under the tension of the tension spring 27, thereby tightening the transmission belt and increasing the transmission diameter of the conical wheels 24, so as to reduce the rotation speed of the exhaust pipe 3 and the turnover cylinder 4;

[0060] It is worth noting that compared with the above-mentioned first speed regulating assembly, the speed regulation of the exhaust pipe 3 and the turnover cylinder 4 in this embodiment can also be stepless, that is, the second electric sliding block 25 moves upward synchronously with the change of the pressure detected by the pressure sensor 19, thereby achieving the effect of real-time regulation of the rotation speed of the turnover cylinder 4, and further more effectively reducing the breaking rate of the tea.

[0061] In one of the more preferred embodiments, in order to further improve the drying efficiency of tea leaves, and accelerate the discharge of water vapor in the turnover cylinder 4, an air blowing device is provided in the turnover cylinder 4, which can be seen in detail in Figure 7 ;

[0062] One of the exhaust pipes 3 is composed of a first air supply pipe 5 connected to the outer wall of the turnover cylinder 4 and a connecting shaft rotatably installed on the side wall of the drying cylinder 1, a gas exchange box 6 is fixed between the first air supply pipe 5 and the connecting shaft, the gas exchange box 6 is in communication with the first air supply pipe 5, a sliding member 7 is slidably installed on the inner wall of the gas exchange box 6, a top rod 8 is fixed inside the sliding member 7, and the two ends of the top rod 8 pass through the two sides of the gas exchange box 6 and can intermittently contact the inner wall of the drying cylinder 1 as the gas exchange box 6 rotates.

[0063] Air inlet channels 11 are formed in the top rods 8 on both sides of the sliding member 7, and one-way valves are installed in the air inlet channels 11 to allow air to be sucked into the gas exchange box 6 in one direction, and one-way valves are installed in the first air supply pipe 5 to allow air to enter the turnover cylinder 4 in one direction.

[0064] As can be seen from the foregoing, the turnover cylinder 4 will continuously rotate to turn over the tea leaves, at the same time, the turnover cylinder 4 will rotate the gas exchange box 6 together, and the end of the sliding member 7 will intermittently contact the inner wall of the drying cylinder 1, since the turnover cylinder 4 and the drying cylinder 1 are eccentrically arranged, therefore, as the gas exchange box 6 rotates, the top rod 8 will drive the sliding member 7 to reciprocate in the gas exchange box 6, and as it reciprocates, it will suck hot air in the drying cylinder 1 through the air inlet channels 11 and intermittently fill it into the turnover cylinder 4 through the first air supply pipe 5, thereby accelerating the discharge of water vapor in the turnover cylinder 4 and improving the drying efficiency of the tea leaves;

[0065] It is worth mentioning that, since the tea leaves fall from above as the turnover cylinder 4 turns over, as shown by the dashed line in Figure 7 , the hot air filled in the first air supply pipe 5 can further perform hot air drying on the tea leaves, which can also accelerate the drying of the tea leaves;

[0066] Moreover, since the speed of the turnover cylinder 4 is high in the early stage of drying, the corresponding speed of the gas exchange box 6 is also high, the speed of the sliding member 7 reciprocating in the gas exchange box 6 is also fast, and the flow rate of the air squeezed from the first air supply pipe 5 is also relatively faster, so as to accelerate the discharge of water vapor from the turnover cylinder 4, and when the speed of the turnover cylinder 4 decreases in the later stage of drying, the flow rate of the hot air squeezed from the first air supply pipe 5 also slows down, and the impact force on the falling tea leaves also correspondingly decreases, avoiding the broken tea leaves caused by the impact of the blown tea leaves on the inner wall of the turnover cylinder 4, thereby also synchronously reducing the breakage rate of the tea leaves.

[0067] In one of the more preferred embodiments, the top rod 8 has a heat conducting wheel 12 rotatably connected to both ends of the top rod 8, and the air inlet of the air inlet channel 11 is directly opposite the heat conducting wheel 12.

[0068] Through the rolling contact between the heat conducting wheel 12 and the drying cylinder 1, on the one hand, the friction between the top rod 8 and the drying cylinder 1 during rotation can be reduced, and on the other hand, the air drawn from the air inlet channel 11 will pass through the heat conducting wheel 12 after absorbing heat, thereby ensuring that the drawn air is hot air.

[0069] In one of the more preferred embodiments, a second air blowing method into the turnover cylinder 4 is provided, which can be specifically referred to as Figure 8 ;

[0070] One of the exhaust pipes 3 is composed of a second air feeding pipe 29 connected to the outer wall of the turnover cylinder 4 and a connecting shaft rotatably installed on the side wall of the drying cylinder 1, a piston cylinder 13 is fixed between the second air feeding pipe 29 and the connecting shaft, the second air feeding pipe 29 is in communication with the piston cylinder 13, a piston block 14 is slidably installed on the inner wall of the piston cylinder 13, a piston rod 15 penetrating out of the piston cylinder 13 is fixed to the outer wall of the piston block 14 away from the second air feeding pipe 29, the piston rod 15 is in rolling contact with the inner wall of the drying cylinder 1, a spring 17 is connected between the outer wall of the piston block 14 away from the air inlet channel 16 and the inner wall of the piston cylinder 13, and the air inlet channel 16 is formed in the interior of the piston rod 15, when the piston block 14 reciprocally slides in the piston cylinder 13, the air flows from the air inlet channel 16 to the second air feeding pipe 29 in one direction.

[0071] The second air blowing method is basically the same as the first air blowing method, except that the piston cylinder 13 is provided on one side, i.e. the turnover cylinder 4 will drive the piston cylinder 13 to rotate when rotating, at the same time, the piston rod 15 will move along the inner wall of the drying cylinder 1, and the rolling wheel installed at the end of the piston rod 15 can reduce the friction between them, then the spring 17 is used to make the piston block 14 reciprocally slide in the piston cylinder 13, and the hot air in the drying cylinder 1 is drawn into the piston cylinder 13 from the air inlet channel 16, and then is fed into the turnover cylinder 4 in one direction through the second air feeding pipe 29, so as to achieve the above-mentioned effect.

[0072] It is worth noting that one-way valves are also installed in the second air feeding pipe 29 and the air inlet channel 16.

[0073] In one of the more preferred embodiments, the inner wall of the turnover cylinder 4 is provided as an inner conical surface 9, and the inner diameter of the inner conical surface 9 gradually decreases away from the first air feeding pipe 5.

[0074] From the above, the tea in the process of turnover drying, will be through the way to fill the air in the turnover cylinder 4 to speed up the drying of tea, and the hot air filled in the tea while blowing down the turnover, will gradually be blown off to the direction away from the first air pipe 5, so that the tea is blown to one side, therefore, through the setting of the inner conical surface 9, can make the tea in the process of rotating turnover, will gradually slide to the direction close to the first air pipe 5, so that the tea adhering to the inner wall of the turnover cylinder 4 will slide to the side of the first air pipe 5 while rotating, and the falling tea will fall away from the side of the first air pipe 5 along with the airflow, so that with the continuous filling of hot air flow, it will have an alternating effect along the axial direction, so that the tea away from the first air pipe 5 can gradually move to the first air pipe 5, until it is blown away again when falling, so that through the continuous circulation, the tea in the turnover cylinder 4 can be dried more evenly, without the phenomenon of local over drying.

[0075] In one of the more preferred embodiments, the inner wall of the turnover cylinder 4 close to the exhaust pipe 3 is provided with a separation chamber 10, and the separation chamber 10 is connected with the inner conical surface 9.

[0076] Because the turnover of tea will inevitably produce broken leaves, therefore, after the evaporation of water, the broken leaves will float into the separation chamber 10 under the action of blowing, so as to separate the large leaves and broken leaves during drying, and the broken leaves can be automatically screened out.

[0077] In one of the more preferred embodiments, the drying cylinder 1 and the turnover cylinder 4 are both provided with an openable semicircular arc shell.

[0078] For details, please refer to Figure 7 By setting the semicircular arc shell, the opening and closing of the drying cylinder 1 and the turnover cylinder 4 can be facilitated, and the tea can be taken out and refilled.

[0079] A method for processing black tea by using an automatic black tea production system, comprising the following steps:

[0080] S1, placing the fermented black tea into the turnover cylinder 4, and driving the turnover cylinder 4 to rotate by the speed regulating assembly, so as to turnover the wet tea in the turnover cylinder 4;

[0081] S2, heating the outer wall of the turnover cylinder 4 by the heating component 18 to perform drying operation on the tea in the turnover cylinder 4, and the tea in the turnover cylinder 4 is continuously turned over with the continuous rotation of the turnover cylinder 4, so that the drying degree is more uniform;

[0082] S3, as the tea is dried, the internal water vapor is discharged from the exhaust pipe 3 to the turnover drum 4 and the drying drum 1, as the moisture is lost, the weight of the tea in the turnover drum 4 is also gradually reduced, and the pressure on the turnover drum 4 and the exhaust pipe 3 is also gradually reduced, when the pressure sensor 19 detects that the pressure value on the exhaust pipe 3 is reduced to a predetermined value, at this time the tea is gradually changed from a wet state to a crisp state, then the pressure sensor 19 controls the speed regulating assembly to reduce the rotation speed of the turnover drum 4, to reduce the turnover rate of the tea, and also reduce the centrifugal effect on the tea, slow down the turnover amplitude and turnover rate of the tea, reduce the amount of tea broken;

[0083] S4, turn off the heating component 18, use the residual heat of the turnover drum 4 and the drying drum 1 to complete the remaining drying process, then take out the dried tea from the turnover drum 4, and refill the tea to be dried, then repeat the above steps again.

[0084] The standard parts used in this embodiment can be directly purchased from the market, and the non-standard structural parts according to the description and drawings can also be directly processed according to the existing technical knowledge without any doubt, and the connection mode of each part adopts the mature conventional means in the existing technology, and the machinery, parts and equipment adopt the conventional models in the existing technology, so the specific description is not made here.

[0085] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An automated black tea production system comprising a drying cylinder (1) and a bottom support (2) mounted at the bottom of the drying cylinder (1), characterized in that, Also include: The turnover cylinder (4) for containing tea, the turnover cylinder (4) is rotatably installed in the inner side wall of the drying cylinder (1) by coaxially connected exhaust pipe (3), the exhaust pipe (3) makes the turnover cylinder (4) with the outside world, and the turnover cylinder (4) is arranged eccentrically with the drying cylinder (1); Heating element (18), the heating element (18) is installed in the inner wall of the drying cylinder (1), for the outer wall of the turnover cylinder (4) is heated; Pressure sensor (19) is installed in the drying cylinder (1), and the pressure sensor (19) is used to detect the pressure change value of the exhaust pipe (3); Speed regulating assembly is used to drive the turnover cylinder (4) to rotate, and when the pressure sensor (19) detects that the pressure value of the exhaust pipe (3) is reduced to a predetermined value, the speed regulating assembly reduces the rotating speed of the turnover cylinder (4); One of the exhaust pipe (3) is composed of the first air pipe (5) connected to the outer wall of the turnover cylinder (4) and the connecting shaft rotatably installed in the side wall of the drying cylinder (1), the first air pipe (5) and the connecting shaft are fixed with the air exchange box (6), and the air exchange box (6) is communicated with the first air pipe (5), the inner wall of the air exchange box (6) is slidably installed with the sliding piece (7), the inside of the sliding piece (7) is fixedly provided with the ejector rod (8), the both ends of the ejector rod (8) are out of the both sides of the air exchange box (6), and can be intermittently contacted with the inner wall of the drying cylinder (1) with the rotation of the air exchange box (6);The air inlet channel (11) is arranged in the ejector rod (8) on both sides of the sliding piece (7), and the one-way valve for allowing air to be sucked into the air exchange box (6) is arranged in the air inlet channel (11), and the one-way valve for allowing air to be sucked into the turnover cylinder (4) is arranged in the first air pipe (5); Or, one of the exhaust pipe (3) is composed of the second air pipe (29) connected to the outer wall of the turnover cylinder (4) and the connecting shaft rotatably installed in the side wall of the drying cylinder (1), the second air pipe (29) and the connecting shaft are fixed with the piston cylinder (13), and the second air pipe (29) is communicated with the piston cylinder (13), the inner wall of the piston cylinder (13) is slidably installed with the piston block (14), the outer wall of the piston block (14) away from the second air pipe (29) is fixed with the piston rod (15) out of the piston cylinder (13), and the piston rod (15) is in rolling contact with the inner wall of the drying cylinder (1), the inside of the piston rod (15) is provided with the air suction channel (16), the outer wall of the piston block (14) away from the air suction channel (16) is connected with the spring (17) between the inner wall of the piston cylinder (13), when the piston block (14) reciprocatingly slides in the piston cylinder (13), air flows from the air suction channel (16) to the second air pipe (29) in one direction.

2. The automated black tea production system as claimed in claim 1, wherein: The speed regulating assembly includes a first gear set (22) fixedly installed on the outer wall of the exhaust pipe (3), and the first gear set (22) includes two gears with different diameters. Also include horizontal sliding installed in the first electric slide (20) in the bottom bracket (2), the first electric slide (20) is installed with the first motor (21), the output shaft of the first motor (21) is fixed with the second gear set (23), the second gear set (23) is the same as the first gear set (22), and the two gear positions are opposite. In the early stage of drying, the large gear in the second gear set (23) is driven with the small gear in the first gear set (22), when the pressure sensor (19) detects that the pressure value of the exhaust pipe (3) is reduced to a predetermined value, the pressure sensor (19) controls the horizontal movement of the first electric slide (20), and the small gear in the second gear set (23) is driven with the large gear in the first gear set (22). Complete the switching of the transmission ratio.

3. The automated black tea production system as claimed in claim 1, wherein: The speed regulating assembly includes two conical wheels (24) slidingly mounted on the outer wall of the exhaust pipe (3), the conical surfaces of the two conical wheels (24) are opposite, and the two conical wheels (24) are connected by a tension spring (27); Also include vertical sliding installed in the second electric slide (25) in the bottom bracket (2), the second electric slide (25) is installed with the second motor (28), the output end of the second motor (28) is fixed with the transmission wheel (26), the transmission wheel (26) and the conical surfaces of the two conical wheels (24) are connected by a transmission belt, when the pressure sensor (19) detects that the pressure value of the exhaust pipe (3) is reduced to a predetermined value, the pressure sensor (19) controls the vertical upward movement of the second electric slide (25).

4. The automated black tea production system as claimed in claim 1, wherein: Both ends of the top rod (8) are rotatably connected with heat conducting wheels (12), and the air inlet of the air inlet channel (11) is opposite to the heat conducting wheel (12).

5. The automated black tea production system as claimed in claim 1, wherein: The inner wall of the turnover cylinder (4) is provided with an inner conical surface (9), and the inner diameter of the inner conical surface (9) gradually decreases with the distance from the first air supply pipe (5) or the second air supply pipe (29).

6. The automated black tea production system as claimed in claim 5, wherein: The inner wall of the turnover cylinder (4) close to the exhaust pipe (3) is provided with a separation cavity (10), and the separation cavity (10) is connected with the inner conical surface (9).

7. The automated black tea production system as claimed in claim 1, wherein: The drying cylinder (1) and the turnover cylinder (4) are both provided with an open semicircular arc shell.

8. A method of processing black tea using the automated black tea production system according to any one of claims 1 to 7, characterized in that, The method comprises the following steps: S1, put the fermented black tea into the turnover cylinder (4), and drive the turnover cylinder (4) to rotate by the speed regulating assembly, so as to turn over the wet tea leaves in the turnover cylinder (4); S2, heat the outer wall of the turnover cylinder (4) by the heating component (18), so as to dry the tea leaves in the turnover cylinder (4), and the tea leaves in the turnover cylinder (4) are continuously turned over with the continuous rotation of the turnover cylinder (4), so that the drying degree is more uniform; S3, as the tea is dried, the internal water vapor is discharged from the exhaust pipe (3) to the turnover barrel (4) and the drying barrel (1) outside, as the moisture loss, the tea weight in the turnover barrel (4) is also gradually reduced, at the same time, the pressure on the turnover barrel (4) and the exhaust pipe (3) is also gradually reduced, when the pressure sensor (19) detects that the pressure value of the exhaust pipe (3) is reduced to a predetermined value, at this time, the tea is gradually changed from wet to crisp, then the pressure sensor (19) controls the speed regulating assembly to reduce the rotation speed of the turnover barrel (4), to reduce the turnover rate of the tea, and also reduce the centrifugal effect on the tea, slow down the turnover amplitude and turnover rate of the tea, reduce the amount of broken tea; S4, turn off the heating component (18), use the residual heat of the turnover barrel (4) and the drying barrel (1) to complete the remaining drying process, then take out the dried tea from the turnover barrel (4) and refill the tea to be dried, then repeat the above steps again.

Images