Multi-stage screening device for tea production

Abstract

The utility model belongs to the technical field of tea production, and particularly relates to a multi-stage screening device for tea production, which comprises a base, a multi-stage screen drum is rotatably connected onto the base, and a driving component for driving the multi-stage screen drum to rotate is further mounted on one side of the base; the multi-stage screen drum comprises a first screen drum used for loading screened objects, a second screen drum and a third screen drum, the first screen drum is sequentially sleeved with the second screen drum and the third screen drum at intervals, and the sizes of screen holes in the surfaces of the first screen drum, the second screen drum and the third screen drum are gradually reduced. Through the drum-type design, when the screen drum rotates, tea leaves slide and roll in the screen drum, and a more stable screening process is formed relative to vibration screening, so that the breaking rate of the tea leaves can be effectively reduced; and secondly, through the multi-stage screen drum formed by sequentially sleeving the first screen drum, the second screen drum and the third screen drum, the tea leaves can be subjected to multi-stage screening at a time, the tea leaves of different sizes can be separated from impurities, and the screening efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of tea production, and particularly relates to a multistage screening device for tea production. BACKGROUND

[0002] In the primary processing of tea, screening is usually carried out after fixation, rolling and drying, with the purpose of removing impurities and tea leaves of different sizes to ensure the quality and consistency of tea;

[0003] The screening device for tea layer collection for tea processing disclosed by the announcement No. CN220215615U relates to the technical field of tea processing and comprises a device seat, a U-shaped frame arranged on the upper side of the device seat, two slide columns two fixed on the left and right sides of the U-shaped frame, a double-shaft motor arranged in the center of the U-shaped frame, and a motor seat fixedly installed outside the double-shaft motor. The tea screening structure composed of a plurality of staggered distribution screening rods solves the problem of tea clogging the filter screen and being difficult to clean. By adjusting the density of the upper and lower screening rods, multi-stage layer screening is realized. The vibration structure composed of the motor seat, the U-shaped frame, and a plurality of slide columns and springs in the device seat realizes multi-stage automatic screening and collection of tea, greatly improves the production efficiency of tea, and makes the screening structure maintain a high-quality screening state for a long time, which is better than the screening effect of the traditional screening device.

[0004] At present, the existing technology usually adopts the vibration screening method for screening tea. The vibration screening method is prone to damage the complete tea leaves due to the jumping of the tea leaves on the screen, thereby forming short and broken tea and affecting the quality of the tea.

[0005] In view of this, the utility model provides a multistage screening device for tea production to solve the above problems. UTILITY MODEL CONTENTS

[0006] To solve the above problems, the utility model provides the following technical scheme: a multistage screening device for tea production, comprising a base, a plurality of screening cylinders rotatably connected to the base, and a driving assembly installed on one side of the base for driving the plurality of screening cylinders to rotate.

[0007] The plurality of screening cylinders comprise a first screening cylinder for loading screening objects, and a second screening cylinder and a third screening cylinder sequentially and spacedly sleeved outside the first screening cylinder. The screen hole sizes of the surfaces of the first screening cylinder, the second screening cylinder and the third screening cylinder gradually decrease. When the first screening cylinder rotates, the second screening cylinder and the third screening cylinder rotate synchronously to make the screening objects slide and tumble at the inner wall bottoms of the screening cylinders to perform multi-stage screening.

[0008] The utility model provides a kind of multi-stage screening device for tea production, which is characterized by the following: a residue box is placed on the base, and the residue box is located at the bottom of the multi-stage screen cylinder for collecting the residue screened by the multi-stage screen cylinder.

[0009] The utility model provides a kind of multi-stage screening device for tea production, which is characterized by the following: the base has oppositely arranged supports, and the multi-stage screen cylinder is rotatably connected between the supports.

[0010] The utility model provides a kind of multi-stage screening device for tea production, which is characterized by the following: a through hole is formed in the side surface of the support, and a bearing is arranged in the through hole.

[0011] The utility model provides a kind of multi-stage screening device for tea production, which is characterized by the following: the multi-stage screen cylinder further comprises a first connecting shaft and a second connecting shaft, which are respectively fixedly connected to the two ends of the multi-stage screen cylinder for insertion and fixation with the inner ring of the bearing, and the second connecting shaft penetrates the inner ring of the bearing and is connected to the driving assembly.

[0012] The utility model provides a kind of multi-stage screening device for tea production, which is characterized by the following: the driving assembly comprises a motor for providing driving force and a speed reducer connected to the output end of the motor.

[0013] The utility model provides a kind of multi-stage screening device for tea production, which is characterized by the following: the output end of the speed reducer is keyed connected to the first connecting shaft.

[0014] The utility model provides a kind of multi-stage screening device for tea production, which is characterized by the following: the surface of the first screen cylinder, the second screen cylinder and the third screen cylinder is provided with a same-direction material port, a cylinder door is hingedly connected in the material port, a lock is arranged in the cylinder door, and the cylinder door is fixed with the material port through the lock to close the screen cylinder.

[0015] The utility model provides a kind of multi-stage screening device for tea production, which is characterized by the following: the size of the material port formed in the surface of the first screen cylinder, the second screen cylinder and the third screen cylinder increases in turn, and the center lines of the material ports are located on the same straight line.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. The utility model is designed as a roller type, so that the tea slides and tumbles in the screen cylinder when the screen cylinder rotates, and a more stable screening process is formed compared with vibration screening, which can effectively reduce the short and broken rate of tea and improve the quality of tea.

[0018] 2. Secondly, the multi-stage screen cylinder formed by the first screen cylinder, the second screen cylinder and the third screen cylinder in turn allows the tea to be screened at multiple levels at a time, and the tea and impurities of different sizes can be separated through one screening, improving the screening efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the vertical cross-sectional structure of the multi-stage sieve cylinder of this utility model;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the multi-stage sieve cylinder of this utility model;

[0024] Figure 5 This is a schematic diagram showing the movement position of the sieved material when the multi-stage sieve cylinder of this utility model rotates.

[0025] In the diagram: 1. Base; 11. Support; 111. Through hole; 112. Bearing; 2. Multi-stage screen cylinder; 21. First screen cylinder; 22. Second screen cylinder; 23. Third screen cylinder; 24. Material inlet; 25. First connecting shaft; 26. Second connecting shaft; 27. Cylinder door; 3. Drive assembly; 31. Motor; 32. Reducer; 4. Slag box. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] This utility model relates to a multi-stage sieving device for tea production, such as... Figure 1 As shown, it includes: a base 1, a multi-stage sieve cylinder 2 rotatably connected to the base 1, and a drive assembly 3 installed on one side of the base 1 for driving the multi-stage sieve cylinder 2 to rotate. The multi-stage sieve cylinder 2 is a cylindrical structure with both ends tapering inward.

[0028] like Figure 2As shown, the base 1 has oppositely arranged supports 11, and transversely through holes 111 are formed in the sides of the supports 11, and bearings 112 are arranged in the through holes 111 and used to connect the multi-stage sieve cylinder 2. The multi-stage sieve cylinder 2 has a first connecting shaft 25 and a second connecting shaft 26 fixedly connected at two ends thereof, and the first connecting shaft 25 and the second connecting shaft 26 are respectively inserted into the inner rings of the corresponding bearings 112, so that the multi-stage sieve cylinder 2 is rotatably connected between the supports 11, and the end of the second connecting shaft 26 penetrates through the inner ring of the bearing 112;

[0029] Figure 2 Further shown is the composition of the driving assembly 3, which includes a motor 31 for providing driving force, and a speed reducer 32 connected with the output end of the motor 31. The motor 31 is electrically connected with an external power source through a controller capable of controlling the operation of the motor 31, and the speed reducer 32 is installed on the side of the support 11, and the output end thereof is axially corresponding to the through hole 111 and is keyed connected with the second connecting shaft 26 penetrating through the inner ring of the bearing 112. When the motor 31 rotates, the speed reducer 32 can provide greater torque to drive the multi-stage sieve cylinder 2 to rotate.

[0030] As shown in the figure, Figures 3-4 The multi-stage sieve cylinder 2 includes a first sieve cylinder 21 for loading the sieving material, and a second sieve cylinder 22 and a third sieve cylinder 23 which are sequentially and spacedly arranged outside the first sieve cylinder 21. The first sieve cylinder 21, the second sieve cylinder 22 and the third sieve cylinder 23 are coaxially connected so that they can synchronously rotate, and the sizes of the sieve holes on the first sieve cylinder 21, the second sieve cylinder 22 and the third sieve cylinder 23 are gradually reduced, i.e., the size of the sieve holes of the first sieve cylinder 21 > the size of the sieve holes of the second sieve cylinder 22 > the size of the sieve holes of the third sieve cylinder 23. It is particularly pointed out that the shapes of the sieve holes of the above-mentioned sieve cylinders include but are not limited to circular and square shapes, and their sizes can be adaptively changed according to actual needs.

[0031] Secondly, the surfaces of the first sieve cylinder 21, the second sieve cylinder 22 and the third sieve cylinder 23 are all provided with same-direction material openings 24, and cylinder doors 27 are hingedly connected to the material openings 24. The sizes of the material openings 24 are gradually increased, and the center lines of the material openings 24 are located on the same straight line, so as to ensure the opening and closing of the cylinder doors 27. The material openings 24 are used for the entry and exit of the sieving material, and the cylinder doors 27 are provided with locks, so that the cylinder doors 27 and the material openings 24 are fixedly connected through the locks to seal the sieve cylinders.

[0032] In specific use, as shown in the figure, Figure 5As shown, taking the sieving of tea leaves as an example, the tea leaves to be sieved are placed in the first sieve cylinder 21, the first sieve cylinder 21, the second sieve cylinder 22 and the third sieve cylinder 23 are synchronously rotated by starting the motor 31, the rotating speed of the motor 31 is controlled, the tea leaves slide and tumble along the bottom of the inner wall of the first sieve cylinder 21, at this time, the tea leaves and impurities smaller than the sieve hole size of the first sieve cylinder 21 fall into the second sieve cylinder 22, the high-quality complete large tea leaves are collected in the first sieve cylinder 21, the tea leaves and impurities falling into the second sieve cylinder 22 slide and tumble again along the bottom of the inner wall of the second sieve cylinder 22, as above, the relatively small tea leaves are collected in the second sieve cylinder 22, the short and broken tea leaves and impurities smaller than the sieve hole size of the second sieve cylinder 22 fall into the third sieve cylinder 23, the impurities in the third sieve cylinder 23 are filtered out through the small sieve holes thereof, and the short and broken tea leaves are collected in the third sieve cylinder 23, so that the tea leaves are sieved into large tea leaves, small tea leaves and short and broken tea leaves.

[0033] Further, in order to collect the sieved impurities, the residue box 4 can be placed on the base 1 and located below the multi-stage sieve cylinder 2, when the impurities are filtered out by the third sieve cylinder 23, they fall into the residue box 4, so as to protect the working environment and be uniformly treated.

[0034] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-stage screening device for tea leaf production comprising a base (1), characterised in that: A plurality of sieve drums (2) are rotatably connected to the base (1), and a driving assembly (3) for driving the plurality of sieve drums (2) to rotate is mounted on one side of the base (1); The plurality of sieve drums (2) comprise a first sieve drum (21) for loading the material to be sieved, and a second sieve drum (22) and a third sieve drum (23) which are sequentially and spacedly sleeved outside the first sieve drum (21), the sieve hole sizes of the surfaces of the first sieve drum (21), the second sieve drum (22) and the third sieve drum (23) gradually decrease, and when the first sieve drum (21) rotates, the second sieve drum (22) and the third sieve drum (23) synchronously rotate to make the material to be sieved slide and tumble at the bottoms of the inner walls of the respective sieve drums, so that the material to be sieved is sieved in multiple stages.

2. The multi-stage screening device for tea production according to claim 1, characterized in that: A residue box (4) is placed on the base (1) and is located at the bottom of the plurality of sieve drums (2) to collect the residue sieved by the plurality of sieve drums (2).

3. The multi-stage screening device for tea production according to claim 1, characterized in that: The base (1) has oppositely arranged supports (11), and the plurality of sieve drums (2) are rotatably connected between the supports (11).

4. The multi-stage screening device for tea production according to claim 3, characterized in that: A through hole (111) is formed in the side surface of the support (11), and a bearing (112) is arranged in the through hole (111).

5. The multi-stage sifting device for tea production according to claim 4, characterized in that: The plurality of sieve drums (2) further comprise a first connecting shaft (25) and a second connecting shaft (26), the first connecting shaft (25) and the second connecting shaft (26) are fixedly connected to the two ends of the plurality of sieve drums (2) respectively, are inserted and fixed with the inner rings of the bearings (112), and the second connecting shaft (26) penetrates the inner ring of the bearing (112) and is connected with the driving assembly (3).

6. The multi-stage sifting device for tea production according to claim 5, characterized in that: The driving assembly (3) comprises a motor (31) for providing driving force, and a speed reducer (32) connected with the output end of the motor (31).

7. The multi-stage sifting device for tea production according to claim 6, characterized in that: The output end of the speed reducer (32) is key-connected with the first connecting shaft (25).

8. The multi-stage screening device for tea production according to claim 1, characterized in that: The surfaces of the first sieve drum (21), the second sieve drum (22) and the third sieve drum (23) are all provided with the same direction material ports (24), the material ports (24) are hingedly connected with drum doors (27), the drum doors (27) are provided with locks, and the drum doors (27) are fixed with the material ports (24) through the locks to close the sieve drums.

9. The multi-stage sifting device for tea production according to claim 8, characterized in that: The sizes of the material ports (24) provided on the surfaces of the first sieve drum (21), the second sieve drum (22) and the third sieve drum (23) gradually increase, and the center lines of the material ports (24) are located on the same straight line.

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