Multi-batch tea leaf fixation machine

Abstract

The utility model discloses a multi-batch tea leaf fixation machine, belongs to the technical field of tea leaf processing, and solves the problems that part of tea leaves are relatively dry and lose fragrance in the process of automatically realizing tea leaf fixation. The front end cover and the rear end cover are fixedly connected to the high support and the low support respectively, the two ends of the fixation cylinder are rotationally connected into the front end cover and the rear end cover respectively, the outer ring of the rear end cover is communicated with a discharging cylinder which is vertically and downwards arranged, and the discharging cylinder can be opened and closed. When the tea leaf fixation device works, an operator only needs to throw tea leaves, start the speed reducing motor, drive the fixation cylinder to rotate through the transmission gear, trigger the Hall sensor by the magnet block, and control the servo motor to blow air after a signal is processed, so that the tea leaves are uniformly turned for fixation.

Description

Technical Field

[0001] The utility model relates to the technical field of tea processing, in particular to a multi-batch tea withering machine. Background Art

[0002] Tea leaf killing is a key step in the production of non-fermented teas such as green tea. The purpose is to quickly destroy the enzyme activity in the tea leaves through high temperature, prevent the tea leaves from fermenting, and maintain their green color and fresh taste. This process is usually carried out in a wok or a killing machine. The water in the tea leaves is evaporated by rapid heating, and the tea leaves become soft, which is convenient for subsequent rolling and molding. During the killing process, the aroma components of the tea begin to form, which is an important link in determining the quality of the tea. The correct killing technology can significantly improve the color, aroma and taste of the tea leaves, while improper operation may cause the color of the tea leaves to darken and lose their aroma. After killing, the chemical composition and physical properties of the tea leaves change, laying the foundation for subsequent drying and molding.

[0003] Currently, tea leaves are often withered by placing them in a heated cylinder and rolling them, so that every tea leaf can come into contact with the heated cylinder as much as possible, thereby achieving the withering action. However, simply rolling the cylinder cannot make the tea leaves turn more evenly. Therefore, in the process of automated tea withering, some tea leaves will become drier and lose their fragrance.

[0004] Therefore, a multi-batch tea withering machine is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a multi-batch tea withering machine.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A multi-batch tea withering machine comprises a high bracket, a low bracket, a front cover and a rear cover respectively fixedly connected to the high bracket and the low bracket, and a withering cylinder whose two ends are rotatably connected to the front cover and the rear cover respectively, the outer ring of the rear cover is connected to a discharge cylinder arranged vertically downward, and the discharge cylinder can be opened and closed, the end surface of the rear cover is connected to an air duct, shielding covers are arranged at the openings at both ends of the air duct, a fan is arranged in the air duct, the front cover is connected to a feeding hopper with an opening arranged upward, and the withering cylinder can be rotatably arranged.

[0008] Preferably, it further includes a number of symmetrically arranged mounting seats disposed below the green tea killing cylinder. Each group of the mounting seats has a bearing seat fixedly connected to the top surface thereof. The inner ring of the bearing seat is fixedly connected with a connecting shaft. The outer ring of the green tea killing cylinder is fixedly connected with an annular rail, and the outer ring of the annular rail abuts against the outer ring of the connecting shaft.

[0009] Preferably, an external gear ring is fixedly connected to the outer ring of the green tea killing cylinder. It further includes a reduction motor. The output shaft of the reduction motor is coaxially fixedly connected with a transmission gear, and the transmission gear is in transmission connection with the external gear ring to realize the rotation of the green tea killing cylinder.

[0010] Preferably, it further includes an electric control circuit, which is coupled to the blower. The electric control circuit controls the operation of the blower according to the rotation speed of the green tea killing cylinder.

[0011] Preferably, the electric control circuit includes

[0012] a Hall sensor. A magnet block is fixedly connected to the outer ring of the green tea killing cylinder. The Hall sensor is arranged on the rotation path of the magnet block, and when the magnet block rotates past the Hall sensor following the rotation of the green tea killing cylinder, the Hall sensor outputs a Hall signal;

[0013] a voltage comparison circuit. The input end of the voltage comparison circuit is coupled to the output end of the Hall sensor. The voltage comparison circuit outputs a comparison signal in response to the Hall signal being greater than the reference signal;

[0014] a counting circuit. The input end of the counting circuit is coupled to the output end of the voltage comparison circuit. The counting circuit counts the comparison signals, resets after reaching the counting upper limit, and outputs a counting signal;

[0015] a timing circuit. The input end of the timing circuit is coupled to the output end of the voltage comparison circuit. The timing circuit starts timing in response to the comparison signal and outputs a timing signal within the timing time;

[0016] a judgment circuit. Its input end is coupled to the output ends of the timing circuit and the counting circuit. The judgment circuit outputs a judgment signal in response to both the timing signal and the counting signal;

[0017] a control circuit. The input end of the control circuit is coupled to the output end of the judgment circuit. The control circuit outputs a control signal in response to the judgment signal;

[0018] a servo motor controller. The input end of the servo motor controller is coupled to the output end of the control circuit. The servo motor controller controls the operation of the blower in response to the control signal.

[0019] Preferably, the voltage comparison circuit includes a voltage comparator and a digital potentiometer connected to its negative pole, the counting circuit includes a counter, the timing circuit includes a minimum system based on a 555 time base chip, the judgment circuit includes an AND gate circuit, and the control circuit includes an STM32F103RCT6 embedded-microcontroller integrated circuit.

[0020] Preferably, a solenoid valve is provided in the discharge barrel to realize the opening and closing of the discharge barrel.

[0021] The utility model has the following beneficial effects:

[0022] When the utility model is working, the operator only needs to put in tea leaves, start the reduction motor, drive the withering cylinder to rotate through the transmission gear, the magnet block triggers the Hall sensor, and after the signal is processed, the servo motor is controlled to blow air, so that the tea leaves are turned over and withered evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0025] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0026] Figure 3 It is a structural block diagram of the electric control circuit in the utility model.

[0027] 1. High bracket; 2. Low bracket; 3. Front cover; 4. Feed hopper; 5. Rear cover; 6. Discharge barrel; 7. Killing barrel; 8. Annular rail; 9. Mounting seat; 10. Bearing seat; 11. Connecting shaft; 12. Air duct; 13. Shielding cover; 14. Fan; 15. Hall sensor; 16. Voltage comparison circuit; 17. Counting circuit; 18. Timing circuit; 19. Judgment circuit; 20. Control circuit; 21. Servo motor controller. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Components of the embodiments of the present utility model generally described and illustrated in the drawings herein can be arranged and designed in a variety of different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0030] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the utility model product is customarily placed during use, or the orientation or positional relationships commonly understood by those skilled in the art. These are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0032] In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0033] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] A multi-batch tea withering machine, such as Figure 1 and Figure 2As shown in the figure, it includes a high bracket 1, a low bracket 2, a front end cover 3 and a rear end cover 5 respectively fixedly connected to the high bracket 1 and the low bracket 2, a green tea killing cylinder 7 with both ends rotatably connected inside the front end cover 3 and the rear end cover 5. The outer ring of the rear end cover 5 is communicated with a vertically downward discharge cylinder 6. The discharge cylinder 6 is arranged to be openable and closable. Specifically, a solenoid valve is arranged inside the discharge cylinder 6 to realize the opening and closing of the discharge cylinder 6. An air duct 12 is communicated with the end face of the rear end cover 5. Shielding covers 13 are arranged at both openings of the air duct 12. A blower 14 is arranged inside the air duct 12. A feed hopper 4 with an upward opening is communicated with the front end cover 3. The green tea killing cylinder 7 is arranged to be rotatable.

[0035] It further includes a plurality of mounting seats 9 arranged symmetrically left and right below the green tea killing cylinder 7. A set of bearing seats 10 are fixedly connected to the top surface of each group of mounting seats 9. A connecting shaft 11 is fixedly connected to the inner ring of the bearing seat 10. An annular rail 8 is fixedly connected to the outer ring of the green tea killing cylinder 7. The outer ring of the annular rail 8 abuts against the outer ring of the connecting shaft 11. An external gear ring is fixedly connected to the outer ring of the green tea killing cylinder 7. It further includes a reduction motor. The output shaft of the reduction motor is coaxially fixedly connected with a transmission gear. The transmission gear is in transmission connection with the external gear ring to realize the rotation of the green tea killing cylinder 7.

[0036] As Figure 3 shown in the figure, it further includes an electric control circuit. The electric control circuit is coupled with the blower 14. The electric control circuit controls the operation of the blower 14 according to the rotation speed of the green tea killing cylinder 7. The electric control circuit includes a Hall sensor 15, a voltage comparison circuit 16, a counting circuit 17, a timing circuit 18, a judgment circuit 19, a control circuit 20, and a servo motor controller 21. The voltage comparison circuit 16 includes a voltage comparator and a digital potentiometer connected to its negative electrode. The counting circuit 17 includes a counter. The timing circuit 18 includes a minimum system based on a 555 timer chip. The judgment circuit 19 includes an AND gate circuit. The control circuit 20 includes an integrated circuit of an STM32F103RCT6 embedded microcontroller.

[0037] A magnet block is fixedly connected to the outer circumference of the fixing cylinder 7. The Hall sensor 15 is arranged on the rotation path of the magnet block. When the magnet block rotates past the Hall sensor 15 following the rotation of the fixing cylinder 7, a Hall signal is output by the Hall sensor 15. The input end of the voltage comparison circuit 16 is coupled to the output end of the Hall sensor 15. The voltage comparison circuit 16 outputs a comparison signal in response to the Hall signal being greater than the reference signal. The input end of the counting circuit 17 is coupled to the output end of the voltage comparison circuit 16. The counting circuit 17 counts the comparison signal, resets after reaching the counting upper limit, and outputs a counting signal. The input end of the timing circuit 18 is coupled to the output end of the voltage comparison circuit 16. The timing circuit 18 starts timing in response to the comparison signal and outputs a timing signal within the timing period. The input end of the judgment circuit 19 is coupled to the output ends of the timing circuit 18 and the counting circuit 17. The judgment circuit 19 outputs a judgment signal in response to both the timing signal and the counting signal. The input end of the control circuit 20 is coupled to the output end of the judgment circuit 19. The control circuit 20 outputs a control signal in response to the judgment signal. The input end of the servo motor controller 21 is coupled to the output end of the control circuit 20. The servo motor controller 21 controls the operation of the blower 14 in response to the control signal.

[0038] When the present utility model actually operates, the operator only needs to put a large amount of tea leaves into the discharging cylinder 6 through the feeding hopper 4, and then start the reduction motor. The reduction motor drives the transmission gear to rotate. When the transmission gear rotates, it also drives the external gear ring to rotate synchronously. Since the fixing cylinder 7 is supported by the front end cover 3, the rear end cover 5, the annular rail 8, and the connecting shaft 11, it can rotate smoothly and keep its height position unchanged. Then, during the rotation of the fixing cylinder 7, the magnet block on its outer circumference can pass through the Hall sensor 15. The Hall sensor 15 feeds back the Hall signal to the voltage comparison circuit 16. After comparison by the voltage comparison circuit 16, a comparison signal is output and given to both the timing circuit 18 and the counting circuit 17 at the same time. The timing circuit 18 outputs a timing signal within its timing period, and the counting circuit 17 counts the comparison signal and outputs a counting signal after the counting is completed. It is required that the judgment circuit 19 simultaneously satisfies the counting signal and the timing signal. Only then will the judgment circuit 19 output a judgment signal. This also requires that the fixing cylinder 7 rotates enough turns within the timing period of the timing circuit 18 to trigger the judgment circuit 19. After the judgment signal is given to the control circuit 20, the control circuit 20 controls the servo motor in the blower 14 through the servo motor controller 21, causing it to start blowing air. The air is guided from the air duct 12 into the fixing cylinder 7, so that the tea leaves in the fixing cylinder 7 inclined downward towards the rear end cover 5 can be blown upward by the wind. Then, during the rotation of the tea leaves following the fixing cylinder 7, they can also be further turned over, avoiding some tea leaves being continuously fixed while some tea leaves cannot be fully fixed.

[0039] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A multi-batch tea withering machine, characterized in that: The invention comprises a high bracket (1), a low bracket (2), a front end cover (3) and a rear end cover (5) respectively fixedly connected to the high bracket (1) and the low bracket (2), and a killing tube (7) whose two ends are respectively rotatably connected to the front end cover (3) and the rear end cover (5). The outer ring of the rear end cover (5) is connected to a discharge tube (6) arranged vertically downward, and the discharge tube (6) can be opened and closed. The end surface of the rear end cover (5) is connected to an air duct (12), and shielding covers (13) are arranged at the openings at both ends of the air duct (12). A fan (14) is arranged in the air duct (12). The front end cover (3) is connected to a feeding hopper (4) with an opening arranged upward, and the killing tube (7) can be rotatably arranged.

2. A multi-batch tea withering machine according to claim 1, characterized in that: It also includes a plurality of left-right symmetrically arranged mounting seats (9) arranged below the killing tube (7), each group of the mounting seats (9) having a group of bearing seats (10) fixedly connected to the top surface, the inner ring of the bearing seats (10) being fixedly connected to a connecting shaft (11), the outer ring of the killing tube (7) being fixedly connected to an annular rail (8), and the outer ring of the annular rail (8) being in contact with the outer ring of the connecting shaft (11).

3. A multi-batch tea leaf fixing machine according to claim 2, characterized in that: The outer ring of the withering cylinder (7) is fixedly connected to an outer gear ring, and also includes a reduction motor, the output shaft of the reduction motor is coaxially fixedly connected to a transmission gear, and the transmission gear is transmission-connected to the outer gear ring to realize the rotation of the withering cylinder (7).

4. A multi-batch tea withering machine according to claim 1, characterized in that: It also includes an electric control circuit, which is coupled to the fan (14) and controls the operation of the fan (14) according to the rotation speed of the killing cylinder (7).

5. A multi-batch tea leaf fixing machine according to claim 4, characterized in that: The electric control circuit comprises A Hall sensor (15), wherein the outer ring of the killing cylinder (7) is fixedly connected with a magnet block, the Hall sensor (15) is arranged on the rotation path of the magnet block, and when the magnet block rotates along with the killing cylinder (7) and passes through the Hall sensor (15), the Hall sensor (15) outputs a Hall signal; A voltage comparison circuit (16), wherein an input end of the voltage comparison circuit (16) is coupled to an output end of the Hall sensor (15), and the voltage comparison circuit (16) outputs a comparison signal in response to the Hall signal being greater than a reference signal; A counting circuit (17), wherein an input end of the counting circuit (17) is coupled to an output end of the voltage comparison circuit (16), and the counting circuit (17) counts the comparison signal and resets after the counting upper limit and outputs a counting signal; A timing circuit (18), wherein an input end of the timing circuit (18) is coupled to an output end of the voltage comparison circuit (16), and the timing circuit (18) starts timing in response to a comparison signal and outputs a timing signal within a timing time; A judgment circuit (19), whose input end is coupled to the output ends of the timing circuit (18) and the counting circuit (17), and the judgment circuit (19) outputs a judgment signal after responding to the timing signal and the counting signal at the same time; A control circuit (20), wherein an input end of the control circuit (20) is coupled to an output end of the judgment circuit (19), and the control circuit (20) outputs a control signal in response to a judgment signal; A servo motor controller (21), wherein an input end of the servo motor controller (21) is coupled to an output end of the control circuit (20), and the servo motor controller (21) controls the fan (14) to operate in response to a control signal.

6. A multi-batch tea leaf fixing machine according to claim 5, characterized in that: The voltage comparison circuit (16) includes a voltage comparator and a digital potentiometer connected to the negative electrode thereof, the counting circuit (17) includes a counter, the timing circuit (18) includes a minimum system based on a 555 time base chip, the judgment circuit (19) includes an AND gate circuit, and the control circuit (20) includes an integrated circuit of an STM32F103RCT6 embedded-microcontroller.

7. The multi-batch tea withering machine according to claim 1, characterized in that: A solenoid valve is arranged inside the discharge barrel (6) to realize opening and closing of the discharge barrel (6).

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