A tea leaf screening device

Abstract

The utility model discloses a kind of tea screening devices, including tea chute, its top end is connected with tea supply device, its bottom end is provided with straight section;Straight section extends along horizontal direction;Fan, it is set below the straight section, its air outlet direction is parallel with the extension direction of straight section;Barrier line array, it is set on the flight path of tea, including multiple barrier lines;Each barrier line is set along transverse, and perpendicular with the flight direction of tea;The longitudinal spacing of longitudinally adjacent barrier line is 1.6~2.8 times of the average length of tea;The lateral spacing of laterally adjacent barrier line is 2~4 times of the average length of tea;Barrier line is used for and tea collision to accelerate tea to fall;Multiple collection tanks, set below barrier line array, along the flight direction of tea distribution, respectively for the tea component of different floating distance. The device can effectively separate complete tea and broken tea, and has better distinguishing degree for tea of different sizes.

Description

Technical Field

[0001] This utility model relates to the field of tea processing, and in particular to a tea screening device. Background Technology

[0002] After drying, tea leaves need to be screened to remove powder, broken leaves, and impurities. Currently, tea screening mainly uses vibrating screens or air separation.

[0003] Vibrating screens: These typically consist of multiple layers to sequentially separate large leaves, stems, normal tea leaves, broken leaves, and powder. However, the elongated shape of tea leaves makes it easy for some whole leaves to pass through the screen and become mixed with debris. While reducing the screen aperture can mitigate this problem, excessively small apertures significantly increase the risk of screen clogging. Furthermore, high-intensity vibration can easily cause secondary breakage of the tea leaves.

[0004] Air separation, another commonly used method, works by separating materials based on the different distances they fall due to density / weight differences in an airflow field. Air separation can effectively separate tea stems, powder, and whole tea leaves, but it is insufficient for separating broken leaves of varying degrees (such as large broken leaves and whole tea leaves) because their density and shape are similar. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, this utility model provides a tea sorting device that uses an array of barrier lines to collide with horizontally flying tea leaves. Because whole tea leaves are larger, their probability of colliding with the barrier lines is significantly higher than that of broken tea residue, thus achieving precise grading of tea leaves of different sizes during the wind sorting process, thereby solving the technical deficiency of traditional wind sorting methods in terms of insufficient differentiation of tea breakage.

[0006] To achieve the above objectives, this utility model provides a tea sorting device, which includes: A tea chute has a tea supply device connected to its top end and a straight section at its bottom end. The straight section extends horizontally and is used to give the tea leaves falling on it an initial horizontal velocity so that they fly out horizontally. A fan is installed below the straight section, and its air outlet direction is parallel to the extension direction of the straight section; An array of barrier lines is arranged along the flight path of the tea leaves, comprising multiple barrier lines; each barrier line is arranged laterally and perpendicular to the flight direction of the tea leaves; the longitudinal spacing between adjacent barrier lines is 1.6 to 2.8 times the average length of the tea leaves; the lateral spacing between adjacent barrier lines is 2 to 4 times the average length of the tea leaves; the barrier lines are used to collide with the tea leaves to accelerate their fall. Multiple collection slots are located below the barrier array and distributed along the flight direction of the tea leaves, each designed to collect tea components that have traveled at different distances.

[0007] A further improvement of this utility model is that the height difference between the top and bottom of the tea chute is 1m to 1.6m.

[0008] A further improvement of this utility model is that the tea supply device includes a tea stacking platform flush with the top of the tea slide and a dial wheel located at the junction of the tea stacking platform and the tea slide. The dial wheel is connected to a drive motor. The dial wheel is used to gradually push the tea leaves on the tea stacking platform to the tea slide, so that the tea leaves fall along the tea slide.

[0009] A further improvement of this utility model is that: the barrier line array includes multiple barrier line columns, each barrier line column includes a longitudinal frame and barrier lines fixed on the longitudinal frame; the two ends of the barrier lines are respectively connected to two vertical rods of the longitudinal frame.

[0010] A further improvement of this utility model is that: the top crossbar of the longitudinal frame extends to both sides to form an overlapping part; the longitudinal frame is supported on the crossbar of the support through the overlapping part.

[0011] A further improvement of this utility model is that the number of barrier lines on each of the longitudinal frames is 10 to 30; and the number of longitudinal frames is 15 to 30.

[0012] A further improvement of this utility model is that the diameter of the blocking line is 0.5mm to 1.2mm.

[0013] A further improvement of this utility model is that the opening of the collection trough faces upward, and the depth of the collection trough is 20~40cm.

[0014] The method provided by this utility model has the following technical effects: (1) By using a barrier line array, the tea screening device can not only screen out dust, fragments and tea stems in the tea, but also effectively separate whole tea leaves from broken tea leaves, and has a good degree of differentiation for tea leaves of different sizes.

[0015] (2) The screening device is based on the principle of wind separation. During the screening process, the collision between tea leaves is small. Compared with the traditional vibration screening method, it can reduce the repeated collision between tea leaves during the screening process and reduce the secondary breakage of tea leaves during the screening process. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the tea sorting device; Figure 2 This is a side view of the tea sorting device; Figure 3This is a schematic diagram of the vertical frame. Detailed Implementation

[0017] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0018] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0019] Some exemplary embodiments of the present invention have been described for illustrative purposes. It should be understood that the present invention may be implemented in other ways not specifically shown in the accompanying drawings.

[0020] like Figure 1 , Figure 2 As shown, this embodiment provides a tea sorting device, which includes: a tea chute 10, a fan 30, a barrier array 40, and multiple collection tanks 60. Specifically: The top of the tea chute 10 is connected to a tea supply device 20, and the bottom is provided with a straight section 11; the straight section 11 extends horizontally and is used to give the tea leaves falling on it an initial horizontal velocity and to make them fly out horizontally. The height difference between the top and bottom of the tea chute 10 is 1m to 1.6m.

[0021] The tea supply device 20 includes a tea stacking platform 21 flush with the top of the tea chute 10 and a deflector 22 located at the junction of the tea stacking platform 21 and the tea chute 10. The deflector 22 is connected to a drive motor. The deflector 22 is used to gradually push the tea leaves on the tea stacking platform to the tea chute 10, so that the tea leaves fall along the tea chute 10. In this embodiment, the deflector 22 is made of rubber to reduce the crushing of the tea leaves during the tea-stirring process.

[0022] The fan 30 is positioned below the straight section 11, and its air outlet direction is parallel to the extension direction of the straight section 11. The fan 30 is used to provide some energy during the tea leaf's flight, making the tea leaf's predetermined trajectory straighter.

[0023] An array of barrier lines 40 is arranged along the flight path of the tea leaves, including multiple barrier lines 41; each barrier line 41 is arranged laterally and perpendicular to the flight direction of the tea leaves; the longitudinal spacing between adjacent barrier lines 41 is 1.6 to 2.8 times the average length of the tea leaves; the lateral spacing between adjacent barrier lines 41 is 2 to 4 times the average length of the tea leaves; the barrier lines 41 are used to collide with the tea leaves to accelerate the falling of the tea leaves.

[0024] like Figure 1 , Figure 3 As shown, the barrier line array 40 includes multiple rows of barrier lines, each row including a barrier line 41 fixed to a longitudinal frame 42; both ends of the barrier line 41 are connected to two vertical bars 43 of the longitudinal frame 42. The top horizontal bar 44 of the longitudinal frame 42 extends to both sides to form an overlap portion 45; the longitudinal frame 42 is supported on a support horizontal bar 46 through the overlap portion 45. The number of barrier lines 41 on the longitudinal frame 42 is 10 to 30; the number of longitudinal frames 42 is 15 to 30. The diameter of the barrier line 41 is 0.5 mm to 1.2 mm.

[0025] In one specific embodiment, the overlapping part 45 is fixedly connected to the support crossbar 46 by bolts, the number of barrier lines 41 on the longitudinal frame 42 is 13, the spacing between adjacent longitudinal barrier lines 41 is 27mm, and the spacing between adjacent longitudinal frames 42 is 5cm.

[0026] Each collection trough 60 is located below the barrier array 40 and distributed along the flight direction of the tea leaves, and is used to collect tea components that have fallen from different distances. The opening of each collection trough 60 faces upwards, and the depth of the collection trough 60 is 20~40cm.

[0027] The process of using the tea sorting device in this embodiment includes the following steps: The tea leaves to be screened are evenly piled on the tea stacking platform 21. The drive motor is started, which drives the dial wheel 22 to rotate and quantitatively feed the tea leaves into the top of the tea slide 10.

[0028] The tea leaves fall along the slide to the bottom straight section 11, gaining an initial horizontal velocity (the 1m~1.6m height difference provides gravitational potential energy). The tea leaves then fly horizontally from the end of the straight section, forming a continuous parabolic trajectory. A fan 30 delivers air parallel to the direction of flight, providing some energy for the tea leaves' flight.

[0029] During the flight of tea leaves, light impurities (such as dust and fragments) are blown to the far end, while heavier components (whole tea leaves and stems) maintain a near-end trajectory. Furthermore, after the tea leaves enter the barrier line array 40 area, the expected values ​​of the collision probability between tea leaves of different sizes and the barrier line 41, as well as the number of collisions with the barrier line 41 during flight, are positively correlated with their size. Whole tea leaves are larger, have a higher probability of colliding with the barrier line 41, and fall earlier after losing kinetic energy; while broken tea leaves, due to their smaller size, have a lower probability of colliding with the barrier line 41, and fall a greater distance. Light impurities (such as dust and fragments) are almost unaffected by the barrier line 41. Tea stems and large leaves mixed in with the tea leaves, due to their excessive size, will fall rapidly after entering the barrier line array 40.

[0030] The various tea components that fall into the tea leaves fall into the corresponding collection tank 60.

[0031] Through actual testing, the tea sorting device of this embodiment can not only screen out dust, fragments, and tea stems in tea leaves, but also effectively separate whole tea leaves from broken tea leaves, and has good differentiation for tea leaves of different sizes. During the sorting process, there is less collision between tea leaves. Compared with the traditional vibration sorting method, it can reduce repeated collisions between tea leaves during the sorting process and reduce secondary breakage of tea leaves.

[0032] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A tea sorting device, characterized in that... include: A tea chute (10) is connected to a tea supply device (20) at its top end and a straight section (11) is provided at its bottom end; the straight section (11) extends in the horizontal direction and is used to make the tea leaves falling on it obtain a horizontal initial velocity and fly out in the horizontal direction. A fan (30) is disposed below the straight section (11), and its air outlet direction is parallel to the extension direction of the straight section (11); An array of barrier lines (40) is set along the flight path of the tea leaves, comprising multiple barrier lines (41); each barrier line (41) is arranged laterally and perpendicular to the flight direction of the tea leaves; the longitudinal spacing between adjacent barrier lines (41) is 1.6 to 2.8 times the average length of the tea leaves; the lateral spacing between adjacent barrier lines (41) is 2 to 4 times the average length of the tea leaves; the barrier lines (41) are used to collide with the tea leaves to accelerate the falling of the tea leaves; Multiple collection slots (60) are arranged below the barrier array (40) and distributed along the flight direction of the tea leaves, respectively for collecting tea leaf components that have fallen at different distances.

2. The tea sorting device according to claim 1, characterized in that: The height difference between the top and bottom of the tea chute (10) is 1m to 1.6m.

3. The tea sorting device according to claim 1, characterized in that: The tea supply device (20) includes a tea stacking platform (21) that is flush with the top of the tea chute (10) and a dial wheel (22) located at the junction of the tea stacking platform (21) and the tea chute (10). The dial wheel (22) is connected to a drive motor. The dial wheel (22) is used to gradually push the tea on the tea stacking platform to the tea chute (10), so that the tea falls down along the tea chute (10).

4. The tea sorting device according to claim 1, characterized in that: The barrier line array (40) includes multiple barrier line columns, each barrier line column including a longitudinal frame (42) and barrier lines (41) fixed on the longitudinal frame (42); the two ends of the barrier lines (41) are respectively connected to two vertical rods (43) of the longitudinal frame (42).

5. The tea sorting device according to claim 4, characterized in that: The top crossbar (44) of the longitudinal frame (42) extends to both sides to form an overlap (45); the longitudinal frame (42) is supported on the support crossbar (46) through the overlap.

6. The tea sorting device according to claim 4, characterized in that: The number of barrier lines (41) on each of the longitudinal frames (42) is 10 to 30; the number of longitudinal frames (42) is 15 to 30.

7. The tea sorting device according to claim 1, characterized in that: The diameter of the barrier line (41) is 0.5 mm to 1.2 mm.

8. The tea sorting device according to claim 1, characterized in that: The opening of the collection trough (60) is upward, and the depth of the collection trough (60) is 20~40cm.

Images