Continuous tea dryer and drying method

Abstract

The invention discloses a continuous tea dryer which comprises a drying box, a feeding port and a discharging port are formed in the drying box, a heating fan is arranged in the drying box, a plurality of conveying layers are arranged in the drying box in the height direction, and each conveying layer comprises a driving wheel set and a driven wheel set which are sequentially arranged in the horizontal direction; the driving wheel set and the driven wheel set are jointly provided with two belts, and a cloth liner is fixedly installed between the two belts. The cloth liner further comprises a motor used for driving the driving wheel set and the driven wheel set to rotate. The tea leaves fall on a cloth liner in the conveying layer, a motor drives a driving wheel set and a driven wheel set to rotate and drives a belt to move, so that the tea leaves move on the cloth liner in the direction from a driving wheel to a driven wheel, and in the process that the tea leaves on the cloth liner move along with the cloth liner, tea leaves in the tea leaves fall into a collecting disc through through holes to be collected. Therefore, the effect of separating tea leaves in the tea leaves in the tea leaf drying process is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of drying machines, and in particular to a continuous tea drying machine and a drying method. Background Art

[0002] Tea processing requires multiple steps, which are generally "raw materials, spreading, withering, rolling, loosening, crystallization, loosening, drying, and finished products". Drying is the last step in the initial processing of tea. Its purpose is to dehydrate the tea in a certain way, so as to reach a certain water content for easy storage; second, during the drying process, complex thermochemical reactions occur to ensure that the color, aroma and taste of the tea are more perfect. Therefore, drying is one of the key processes for improving the quality of various types of tea.

[0003] The existing method of drying tea leaves is to transport the tea leaves to a drying box via a conveyor belt, and heat and dehumidify the tea leaves in the drying box to dry the tea leaves. In order to reduce the volume of the drying box while keeping the drying time unchanged, at least two layers of conveyor belts are generally provided in the drying box, thereby reducing the length of the drying box while maintaining the original drying time.

[0004] During the process of spreading, rolling, and loosening, the tea leaves are flattened, rolled into balls, and then loosened, which will inevitably cause them to be damaged. These broken parts will be mixed with the more intact tea leaves during the drying process, which will affect the quality of the tea when it is produced. Summary of the invention

[0005] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the present invention is to provide a continuous tea drying machine and drying method, which are convenient for separating tea residues during the drying process and improving the quality of tea.

[0006] To achieve the above object, the present invention provides the following technical solution: a continuous tea drying machine, comprising a drying box, the drying box is provided with a feed inlet and a discharge outlet, a heating fan is provided inside the drying box, a plurality of conveying layers are provided in the height direction of the drying box, and the conveying directions of adjacent conveying layers are opposite; The conveying layer includes a driving wheel group and a driven wheel group arranged in sequence in the horizontal direction, the driving wheel group and the driven wheel group are jointly provided with two belts, a pad is fixedly installed between the two belts, and the pad forms a circle along the belt track from head to tail, and also includes a motor for driving the driving wheel group and the driven wheel group to rotate, and the motor is fixedly installed on the drying box; The pad cloth is provided with a plurality of groups of through holes along its length direction, each group of through holes has a plurality of through holes, and the through holes are evenly distributed along the width direction of the pad cloth. A collecting tray for collecting tea residues is arranged inside the pad cloth.

[0007] Furthermore, the driving wheel group includes a first rotating shaft, on which two first wheels are fixedly installed along its axial direction, and the driven wheel group includes a second rotating shaft, on which a second wheel matched with the first wheel is fixedly installed along its axial direction, and the single belt is internally sleeved on the circumferential side surfaces of the first wheel and the matched second wheel.

[0008] Furthermore, the inner wall surface of the collecting tray forms an angle a with respect to the horizontal plane, and a is 3 degrees to 7 degrees. A discharge channel is provided on the drying box and on a lower side of the collecting tray.

[0009] Furthermore, a roller is provided on the inner side of each belt, and the roller is slidably provided on the drying box, and the first rotating wheel, the second rotating wheel and the roller distribution trajectory on the drying box are a triangle with the sharp angle facing downward, and a spring for pushing the roller downward is fixedly installed on the drying box, and a turntable is provided on the inner side of the belt in each conveying layer, and the peripheral side surface of the turntable is in contact with the upper inner wall of the belt, and a protrusion is fixedly installed on the peripheral side surface of the turntable, and a shaft is fixedly installed on the peripheral side surface of the turntable, and a first gear is fixedly installed on the peripheral side surface of the shaft, and a second gear meshing with the first gear is fixedly installed on the peripheral side surface of the first rotating shaft.

[0010] Furthermore, a rod is provided on the side of the two roller shafts in each conveying layer for rotating together, the rod is fixedly connected to the collecting plate, a strip groove for sliding the rod is provided on the drying box, one end of the spring is fixedly connected to the side surface of the rod, and the other end of the spring is fixedly connected to the drying box.

[0011] Furthermore, in adjacent conveying layers, the projection of the tail of the upper conveying layer in the vertical direction is located on the lower conveying layer, and the distance between the projection of the tail of the upper conveying layer and the head of the lower conveying layer in the vertical direction is 20cm-40cm.

[0012] A drying method of a continuous tea drying machine: S1, first pass the tea leaves through the feed inlet into the drying box, so that the tea leaves fall on the mat in the top conveying layer; S2, turn on the heating fan to transport hot air into the drying box; S3, the motor drives the driving wheel group and the driven wheel group to rotate, thereby driving the pad cloth to move, thereby conveying the tea leaves; S4, when the tea leaves are transported by the mat, the tea residues carried by the tea leaves fall through the through holes onto the collecting plate and are collected; S5, driving the turntable to rotate through the driving wheel group and the driven wheel group, so that the protrusions on the turntable continuously hit the belt, accelerating the falling of tea residues in the tea leaves; S6. After the tea leaves pass through the conveying layer distributed from top to bottom, the drying and tea residue cleaning work is completed.

[0013] Compared with the prior art, the beneficial effect of the present invention is that when tea leaves fall onto the mat cloth in the conveying layer, the motor drives the driving wheel group and the driven wheel group to rotate, drives the belt to move, and the mat cloth between the two belts also moves with the movement of the belt, so that the tea leaves will move from the driving wheel to the driven wheel on the mat cloth. When the tea leaves move to the driven wheel, they will fall from the driven wheel to the mat cloth of the next conveying layer. In the process of the tea leaves on the mat cloth moving with the mat cloth, the tea residues in the tea leaves will fall into the collecting tray through the through holes and be collected, thereby achieving the effect of separating the tea residues in the tea leaves during the drying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the distribution of the entire transport layer structure of the present invention; Figure 4 It is a schematic diagram of a single transport layer structure of the present invention; Figure 5 It is a schematic diagram of the overall structure of the present invention.

[0015] In the figure: 1. drying box; 2. feed port; 3. discharge port; 4. heating fan; 5. conveying layer; 51. driving wheel group; 511. first rotating shaft; 512. first rotating wheel; 52. driven wheel group; 521. second rotating shaft; 522. second rotating wheel; 53. belt; 54. pad cloth; 55. motor; 56. through hole; 57. collecting plate; 6. roller; 7. spring; 8. turntable; 9. bump; 10. shaft; 11. first gear; 12. second gear; 13. plug rod; 14. strip groove. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1 and Figure 2 The present embodiment provides a continuous tea drying machine, including a drying box 1, on which a feed port 2 and a discharge port 3 are provided. A plurality of conveying layers 5 are provided in the drying box 1 along the height direction, and the conveying directions of adjacent conveying layers 5 are opposite. Tea leaves enter through the feed port 2 and are laid on the conveying layer 5. The conveying layer 5 on the upper layer continuously transports the tea leaves to the conveying layer 5 on the lower layer.

[0018] See also Figure 3 , among the adjacent conveying layers 5, the projection of the tail of the upper conveying layer 5 in the vertical direction is located on the lower conveying layer 5, and the distance between the projection of the tail of the upper conveying layer 5 and the head of the lower conveying layer 5 in the vertical direction is 20cm-40cm. (The head refers to the side where the tea leaves have just landed on the conveying layer 5, and the tail refers to the side where the tea leaves have just left the conveying layer 5) Therefore, the tea leaves transported by the upper transport layer 5 can fall downwards and onto the lower transport layer 5 when moving to the tail of the upper transport layer 5, thereby preventing the tea leaves from escaping from the transport layer 5 and being unable to be transported.

[0019] A heating fan 4 is arranged inside the drying box 1, and the fan drives the air to flow. The flowing air is heated by the heating element and then enters the drying box 1. The flowing hot air passes through the conveying layer 5, thereby drying the tea leaves on the conveying layer 5. See also Figure 3 and Figure 4 The conveying layer 5 includes a driving wheel group 51 and a driven wheel group 52 arranged in sequence along the horizontal direction. The driving wheel group 51 and the driven wheel group 52 are jointly provided with two belts 53. A padding cloth 54 is fixedly installed between the two belts 53. The padding cloth 54 is circled along the track of the belt 53 from head to tail. The conveying layer 5 also includes a motor 55 for driving the driving wheel group 51 and the driven wheel group 52 to rotate. The motor 55 is fixedly installed on the drying box 1.

[0020] See also Figure 4 and Figure 5 The driving wheel group 51 includes a first rotating shaft 511, on which two first rotating wheels 512 are fixedly installed along its axial direction. The driven wheel group 52 includes a second rotating shaft 521, on which a second rotating wheel 522 matched with the first rotating wheel 512 is fixedly installed along its axial direction. A single belt 53 is internally sleeved on the circumferential side surfaces of the first rotating wheel 512 and the matched second rotating wheel 522.

[0021] A belt 53 is provided on the circumferential side of the first rotating wheel 512 and the matching second rotating wheel 522. The motor 55 drives the first rotating shaft 511 to rotate, and the first rotating shaft 511 drives the first rotating wheel 512 to rotate. The first rotating wheel 512 drives the second rotating wheel 522 to rotate through the belt 53, so that the driving wheel group 51 drives the driven wheel group 52 to rotate.

[0022] The tea leaves fall onto the pad cloth 54 in the conveying layer 5, and the motor 55 drives the driving wheel group 51 and the driven wheel group 52 to rotate, driving the belt 53 to move, and the pad cloth 54 between the two belts 53 also moves with the movement of the belt 53, so that the tea leaves will move from the driving wheel to the driven wheel on the pad cloth 54. When the tea leaves move to the driven wheel, they will fall from the driven wheel to the pad cloth 54 of the next conveying layer 5.

[0023] During the process of spreading, rolling, and loosening the tea leaves, the tea leaves are flattened, rolled into balls, and then loosened and dispersed, and it is inevitable that the tea leaves will be damaged. These broken parts will affect the quality of the tea.

[0024] In the previous processes, there is moisture in the tea leaves, so the tea leaves are soft, and the fragments are easy to stick to the complete tea leaves and are difficult to separate. During drying, the tea leaves are separated and the fragments are difficult to stick to the complete tea leaves, so they are easy to fall off.

[0025] See also Figure 3 and Figure 4 Therefore, in order to solve the above technical problems, the pad 54 has multiple groups of through holes 56 along its length direction, each group of through holes 56 has multiple through holes, which are evenly distributed along the width direction of the pad 54. The inner side of the pad 54, that is, the inner side of the circle formed by the pad 54, is provided with a collecting tray 57 for collecting tea residues.

[0026] The tea leaves are laid on the mat 54 and move with the mat 54 , while the tea residues in the tea leaves fall through the through holes 56 into the collecting tray 57 and are collected.

[0027] If the tea dregs in the collecting tray 57 are not cleaned out in time, they are likely to accumulate, and replacing the collecting tray 57 from the inside is relatively cumbersome.

[0028] In order to solve the above technical problems, the inner wall surface of the collecting tray 57 is at an angle a relative to the horizontal plane, and a is 3 degrees to 7 degrees. A discharge channel is provided on the drying box 1 and on the lower side of the collecting tray 57.

[0029] Because the collecting tray 57 is in an inclined state, the tea residues that fall into the collecting tray 57 will slide along the inner wall surface of the collecting tray 57 to the discharge channel under the action of gravity, and will be discharged to the outside through the discharge channel, reducing the accumulation of tea residues in the collecting tray 57.

[0030] Among them, because the tea leaves are laid on the mat 54 with a certain thickness, there are some tea leaves residues located on the upper side of the entire tea leaves. In order to improve the quality of the tea leaves, the tea leaves residues are screened and the excess tea leaves are removed to improve the overall tea quality.

[0031] See also Figure 4 and Figure 5A roller 6 is arranged on the inner side of each belt 53, and the roller 6 is slidably arranged on the drying box 1. The distribution tracks of the first rotating wheel 512, the second rotating wheel 522 and the roller 6 on the drying box 1 are a triangle with the pointed angle facing downward. A spring 7 for pushing the roller 6 downward is fixedly installed on the drying box 1. A turntable 8 is arranged on the inner side of the belt 53 in each conveying layer 5. The side surface of the turntable 8 contacts the inner wall of the upper side of the belt 53. A protrusion 9 is fixedly installed on the side surface of the turntable 8. A shaft rod 10 is fixedly installed on the side surface of the turntable 8. A first gear 11 is fixedly installed on the side surface of the shaft rod 10. A second gear 12 meshing with the first gear 11 is fixedly installed on the side surface of the first rotating shaft 511.

[0032] The first shaft 10 rotates to drive the first rotating wheel 512 to rotate, and then drives the belt 53 and the pad 54 to move, so that the tea leaves are transported in the drying box 1. The first rotating shaft 511 rotates to drive the second gear 12 to rotate. Since the second gear 12 is meshed with the first gear 11, the second gear 12 also starts to rotate, and then drives the shaft 10 and the rotating disk 8 to rotate. Since the side surface of the rotating disk 8 contacts the inner side wall of the belt 53, when the protrusion 9 on the rotating disk 8 rotates with the rotating disk 8 to the upper side of the rotating disk 8, the protrusion 9 contacts the belt 53, so that the protrusion 9 will push the belt 53 to bulge upward. Since the belt 53 partially bulges upward, the overall tension of the belt 53 increases. At this time, since the distribution trajectory of the first rotating wheel 512, the second rotating wheel 522 and the roller 6 is a triangle with a pointed angle facing downward, when the tension of the belt 53 increases, it will pull the roller 6 to move upward, thereby reducing the tension of the belt 53. Since the rotating disk 8 rotates continuously, the protrusion 9 will also continuously contact the belt 53, so that the belt 53 is in a shaking state during the movement. When the belt 53 vibrates, the pad cloth 54 is driven to vibrate together, so that the tea leaves on the pad cloth 54 are in a state of being used, and then the tea residues on the upper layer gradually move downward and finally enter the collecting plate 57 through the through hole 56. At the same time, the shaking of the pad cloth 54 will make the gaps between the tea leaves in a changing state, increasing the gaps between the tea leaves from time to time, so that when hot air is drying the tea leaves, the hot air will enter from the gaps, thereby improving the drying efficiency of the tea leaves.

[0033] To increase the vibration frequency of the belt 53, the number of teeth of the second gear 12 is greater than that of the first gear 11. Therefore, the rotational angular velocity of the first gear 11 is greater than that of the second gear 12. Therefore, after the second gear 12 rotates one circle, the number of rotations of the first gear 11 is greater than that of the second gear 12, so that the rotational speed of the protrusion 9 around the axis of the rotating disk 8 increases, and then the frequency of contact with the belt 53 increases, thereby increasing the separation rate of tea residues and also improving the drying efficiency.

[0034] The two rollers 6 in each conveying layer 5 are provided with an insertion rod 13 on the side of the axis for common rotation. The insertion rod 13 is fixedly connected to the collecting plate 57. The drying box 1 is provided with a strip groove 14 for the insertion rod 13 to slide. One end of the spring 7 is fixedly connected to the side of the insertion rod 13, and the other end of the spring 7 is fixedly connected to the drying box 1.

[0035] During the up and down movement of the roller 6, the roller 6 will drive the insertion rod 13 to move up and down together, that is, the insertion rod 13 moves up and down in the strip groove 14, so that the spring 7 continuously switches between the contraction state and the reset state, wherein the up and down movement of the insertion rod 13 will drive the collection plate 57 to move up and down, thereby accelerating the discharge of tea residues in the collection plate 57 into the collection box during the movement of the collection plate 57.

[0036] A continuous tea drying method: S1, firstly, the tea leaves are put into the drying box 1 through the feed port 2, and the tea leaves fall on the mat 54 in the top conveying layer 5; S2, turn on the heating fan 4 to transport hot air into the drying box 1; S3, the motor 55 drives the driving wheel set 51 and the driven wheel set 52 to rotate, thereby driving the pad 54 to move, thereby conveying the tea leaves; S4, when the pad 54 is conveying the tea leaves, the tea residues carried by the tea leaves fall through the through holes 56 onto the collecting plate 57 and are collected; S5, driving the turntable 8 to rotate through the driving wheel group 51 and the driven wheel group 52, so that the protrusions 9 on the turntable 8 continuously hit the belt 53, accelerating the falling of tea residues in the tea leaves; S6, after the tea leaves pass through the conveying layer 5 distributed from top to bottom, the drying and tea residue cleaning work is completed.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A continuous tea drying machine, comprising a drying box (1), wherein the drying box (1) is provided with a feed inlet (2) and a discharge outlet (3), and a heating fan (4) is provided inside the drying box (1), characterized in that: A plurality of conveying layers (5) are arranged in the drying box (1) along the height direction, and the conveying directions of adjacent conveying layers (5) are opposite; The conveying layer (5) comprises a driving wheel group (51) and a driven wheel group (52) arranged in sequence along a horizontal direction, the driving wheel group (51) and the driven wheel group (52) being provided with two belts (53) together, a padding cloth (54) being fixedly installed between the two belts (53), the padding cloth (54) forming a circle along the track of the belts (53) from head to tail, and further comprising a motor (55) for driving the driving wheel group (51) and the driven wheel group (52) to rotate, the motor (55) being fixedly installed on the drying box (1); The pad cloth (54) is provided with a plurality of groups of through holes (56) along its length direction, each group of through holes (56) having a plurality of through holes evenly distributed along the width direction of the pad cloth (54), and a collecting tray (57) for collecting tea residues is provided inside the pad cloth (54).

2. The continuous tea drying machine according to claim 1, characterized in that: The driving wheel assembly (51) comprises a first rotating shaft (511), on which two first rotating wheels (512) are fixedly mounted along the axial direction thereof; the driven wheel assembly (52) comprises a second rotating shaft (521), on which a second rotating wheel (522) matching the first rotating wheel (512) is fixedly mounted along the axial direction thereof; the single belt (53) is sleeved on the circumferential side surfaces of the first rotating wheel (512) and the matching second rotating wheel (522).

3. The continuous tea drying machine according to claim 1, characterized in that: The inner wall surface of the collecting tray (57) forms an angle a with respect to the horizontal plane, and a is 3 degrees to 7 degrees. A discharge channel is provided on the drying box (1) and on a lower side of the collecting tray (57).

4. The continuous tea drying machine according to claim 2, characterized in that: A roller (6) is arranged on the inner side of each belt (53), and the roller (6) is slidably arranged on the drying box (1). The first rotating wheel (512), the second rotating wheel (522) and the roller (6) on the drying box (1) are arranged in a triangle with the pointed corner facing downward. A spring (7) for pushing the roller (6) downward is fixedly mounted on the drying box (1). A turntable (8) is arranged on the inner side of the belt (53) in each conveying layer (5). The peripheral side of the turntable (8) contacts the inner wall of the upper side of the belt (53). A protrusion (9) is fixedly mounted on the peripheral side of the turntable (8). A shaft (10) is fixedly mounted on the peripheral side of the turntable (8). A first gear (11) is fixedly mounted on the peripheral side of the shaft (10). A second gear (12) meshing with the first gear (11) is fixedly mounted on the peripheral side of the first rotating shaft (511).

5. The continuous tea drying machine according to claim 4, characterized in that: The number of teeth on the second gear (12) is greater than the number of teeth on the first gear (11).

6. The continuous tea drying machine according to claim 4, characterized in that: An insertion rod (13) is provided on the side of the shaft of the two rollers (6) in each of the conveying layers (5) so as to rotate together. The insertion rod (13) is fixedly connected to the collecting plate (57). A strip groove (14) for the insertion rod (13) to slide is provided on the drying box (1). One end of the spring (7) is fixedly connected to the side of the insertion rod (13), and the other end of the spring (7) is fixedly connected to the drying box (1).

7. The continuous tea drying machine according to claim 1, characterized in that: In adjacent conveying layers (5), the projection of the tail of the upper conveying layer (5) in the vertical direction is located on the lower conveying layer (5), and the distance between the projection of the tail of the upper conveying layer (5) and the head of the lower conveying layer (5) in the vertical direction is 20 cm-40 cm.

8. The drying method of the continuous tea drying machine according to any one of claims 1 to 7, characterized in that: S1, firstly, the tea leaves are passed through the feed port (2) into the drying box (1), so that the tea leaves fall onto the pad (54) in the top conveying layer (5); S2, turning on the heating fan (4) to convey hot air into the drying box (1); S3, the motor (55) drives the driving wheel set (51) and the driven wheel set (52) to rotate, thereby driving the pad cloth (54) to move, thereby conveying the tea leaves; S4, during the process of the pad (54) conveying the tea leaves, the tea residues carried by the tea leaves fall through the through holes (56) onto the collecting plate (57) and are collected; S5, driving the rotating disk (8) to rotate by means of the driving wheel set (51) and the driven wheel set (52), so that the protrusions (9) on the rotating disk (8) continuously impact the belt (53), thereby accelerating the falling of tea residues in the tea leaves; S6. After the tea leaves pass through the conveying layer (5) distributed from top to bottom, the tea leaves are dried and the tea residues are cleaned.

Images