Multistage screening device for black tea processing
Through the design of the multi-stage screening device, the use of motor drive and gradually smaller aperture screening mesh can solve the problems of tea grain uniformity and classification in black tea processing, and improve production efficiency and product quality.
Patent Information
- Application Number
- CN202422366771.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-27
AI Technical Summary
In existing black tea processing equipment, a single screening unit cannot ensure the uniformity of tea particles and classified according to market demand, affecting product quality and production efficiency.
The multi-stage screening device is adopted, and the screening frame is driven by the motor-driven rotating shaft and gear system to reciprocate. Combined with the screen mesh with gradually smaller apertures and elastic latch design, multi-stage screening and convenient disassembly and assembly are achieved.
It achieves efficient classification and particle uniformity of black tea leaves, meets the needs of different consumers, and improves production efficiency and product quality.
Smart Images
Figure CN223209922U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of black tea processing and screening, in particular to a multi-stage screening device for black tea processing. Background Art
[0002] Black tea, made from the tender leaves or buds of the Camellia sinensis plant (Theaceae), is made from suitable new tea buds and leaves. During processing, black tea undergoes chemical reactions centered around the enzymatic oxidation of tea polyphenols, significantly altering the chemical composition of the fresh leaves. Tea polyphenols decrease by over 90%, while new compounds like theaflavins and thearubigins emerge. The aroma compounds are significantly increased compared to fresh leaves. Black tea processing begins with screening to remove impurities, a process that significantly impacts the tea's flavor.
[0003] Some existing black tea processing and screening machines use only a single screening unit to screen the black tea once and then directly enter the next working link. A single screening cannot separate the black tea leaves into particles of different sizes, and cannot ensure the particle uniformity of the final product. In addition, since tea leaves of different sizes may have different tastes and aromas, a single screening cannot classify the black tea leaves according to market demand and produce tea leaves of different grades and flavors to meet the needs of different consumers. In addition, a single screening may affect the quality of the black tea processing and screening. The black tea that has not been fully screened may need to be manually collected and re-put into a second screening, which may affect the work efficiency of the black tea processing and production. Utility Model Content
[0004] The purpose of the utility model is to solve the problems existing in the prior art and to propose a multi-stage screening device for black tea processing.
[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0006] A multi-stage screening device for black tea processing comprises several support frames, which are arranged from top to bottom and fixedly connected to each other, a load-bearing plate being fixedly connected to the left side of the support frame, and several support legs for support being fixedly provided below the bottom support frame and the load-bearing plate, a reciprocating frame being slidably provided on the inner side of each support frame, an opening being provided on the right side of the reciprocating frame, a screening frame being inserted through the opening on the right side of the reciprocating frame, a screen being fixedly connected to the inner side of the screening frame, a motor being fixedly installed below the bottom load-bearing plate, and a driving mechanism being provided between the output shaft of the motor and the several reciprocating frames.
[0007] Preferably, the aperture of the screen gradually decreases from top to bottom, and a closing plate covering the screen is fixedly connected to the bottom of the screening frame at the bottom.
[0008] Preferably, the driving mechanism includes a rotating shaft rotatably arranged between several supporting plates, the bottom end of the rotating shaft is connected to the output shaft of the motor, a fixed shaft is fixedly arranged on the top of the supporting plate, a gear I is rotatably arranged on the outer wall of the fixed shaft, a gear II engaged with gear I is fixedly sleeved on the outer wall of the rotating shaft, an axle pin is fixedly arranged on the top of the gear I, a connecting rod is hingedly installed on the axle pin, and the other end of the connecting rod passes through the supporting frame and is hinged to the reciprocating frame.
[0009] Preferably, a handle is fixedly provided on the right side of the screening frame, an elastic pin is fixedly provided on the right side of the inner wall of the screening frame, and sockets are provided on the top and bottom of the reciprocating frame. The screening frame is connected by plugging and fitting the elastic pin and the socket.
[0010] Preferably, the elastic pin includes a fixed cylinder fixedly connected to the inner side of the screening frame, the top and bottom ends of the fixed cylinder are respectively provided with an insertion rod that can be inserted into the socket, the outer wall of the insertion rod is fixedly sleeved with a slide slidingly set in the fixed cylinder, the inner wall of the fixed cylinder is fixedly connected with a fixing ring, a spring sleeved on the outside of the insertion rod is fixedly connected between the fixing ring and the slide, the end of the insertion rod passes through the fixing ring and is connected to a pull rope, and a pull ring connected to the pull rope is provided on the outside of the screening frame.
[0011] Preferably, the front side and the rear side of the inner wall of the support frame are both provided with sliding grooves, and the front side and the rear side of the reciprocating frame are both fixedly connected with a plurality of sliding rods extending into the sliding grooves.
[0012] Preferably, balls in contact with the inner wall of the sliding groove are embedded on the outer wall and end of the sliding rod.
[0013] Compared with the prior art, the advantages and positive effects of the present invention are:
[0014] 1. In the utility model, the reciprocating frame is pulled by the motor-driven rotating shaft through gear II, gear I, shaft pin and connecting rod to make the screen move back and forth to realize the automation of the screening process. The multi-stage screen design with gradually decreasing aperture from top to bottom realizes one-time multi-stage screening, effectively classifies black tea leaves according to particle size, improves screening efficiency and accuracy, and improves production efficiency.
[0015] 2. In the present invention, the disassembly and assembly between the screening frame and the reciprocating frame is achieved through the design of elastic pins, which makes it easy for operators to take out the tea leaves after screening. The black tea particles in each screening frame are similar in size, ensuring the uniformity of the particles of the final product. Different black tea leaves can be classified according to market demand to meet the needs of different consumers. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1This is a schematic diagram of the three-dimensional structure of a multi-stage screening device for black tea processing proposed in the utility model;
[0017] Figure 2 This utility model proposes a three-dimensional structure diagram of a multi-stage screening device for black tea processing Figure 2 ;
[0018] Figure 3 This is a partial structural diagram of a multi-stage screening device for black tea processing proposed in the utility model;
[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of an elastic latch of a multi-stage screening device for black tea processing proposed by the utility model;
[0020] Figure 5 The utility model provides a schematic diagram of the sliding rod structure of a multi-stage screening device for black tea processing.
[0021] Legend: 1. Support frame; 11. Slide; 2. Load-bearing plate; 3. Support leg; 4. Reciprocating frame; 41. Socket; 42. Slide rod; 43. Ball; 5. Screening frame; 51. Handle; 52. Elastic latch; 521. Fixed cylinder; 522. Insert rod; 523. Slide plate; 524. Fixed ring; 525. Spring; 526. Pull rope; 527. Pull ring; 6. Screen; 7. Motor; 8. Driving mechanism; 81. Rotating shaft; 82. Fixed shaft; 83. Gear I; 84. Gear II; 85. Axle pin; 86. Connecting rod; 9. Closing plate. DETAILED DESCRIPTION
[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.
[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.
[0024] like Figure 1-5As shown, the utility model provides a multi-stage screening device for black tea processing, comprising a plurality of support frames 1, which are arranged from top to bottom and fixedly connected to each other, a load-bearing plate 2 being fixedly connected to the left side of the support frame 1, a plurality of support legs 3 for support are fixedly provided below the bottom support frame 1 and the load-bearing plate 2, a reciprocating frame 4 is slidably provided on the inner side of each support frame 1, an opening is provided on the right side of the reciprocating frame 4, a screening frame 5 is inserted into the right side of the reciprocating frame 4 through the opening, a screen 6 is fixedly connected to the inner side of the screening frame 5, a motor 7 is fixedly installed below the bottom load-bearing plate 2, and a driving mechanism 8 is provided between the output shaft of the motor 7 and the plurality of reciprocating frames 4.
[0025] In this embodiment, the aperture of the screen 6 gradually decreases from top to bottom, and a closing plate 9 covering the screen 6 is fixedly connected to the bottom of the bottom screening frame 5 .
[0026] In this embodiment, the driving mechanism 8 includes a rotating shaft 81 rotatably arranged between several supporting plates 2, the bottom end of the rotating shaft 81 is connected to the output shaft of the motor 7, a fixed shaft 82 is fixedly arranged on the top of the supporting plate 2, and a gear I83 is rotatably arranged on the outer wall of the fixed shaft 82. A gear II84 engaged with the gear I83 is fixedly sleeved on the outer wall of the rotating shaft 81, and an axle pin 85 is fixedly arranged on the top of the gear I83. A connecting rod 86 is hingedly installed on the axle pin 85, and the other end of the connecting rod 86 passes through the supporting frame 1 and is hinged to the reciprocating frame 4. The motor 7 drives the rotating shaft 81 to rotate the gear II84, drives the gear I83 and pulls the connecting rod 86 through the axle pin 85, and the connecting rod 86 pulls the reciprocating frame 4 to perform reciprocating motion for screening.
[0027] In this embodiment, a handle 51 is fixedly provided on the right side of the screening frame 5, an elastic pin 52 is fixedly provided on the right side of the inner wall of the screening frame 5, and sockets 41 are provided on the top and bottom of the reciprocating frame 4. The screening frame 5 is connected by plugging and fitting the elastic pin 52 and the socket 41.
[0028] The cam 524 is fixedly connected to the inner side of the screen frame 5 by the spring 525, and the spring 526 is fixedly connected to the outer side of the screen frame 5 by the spring 525. The end of the cam 524 passes through the fixed ring 524 and is connected to the pull rope 526. The outer side of the screen frame 5 is provided with a pull ring 527 connected to the pull rope 526. The pull ring 527 is used to pull the cam 522 via the pull rope 526, and the cam 522 is moved and separated from the cam 41, so that the screen frame 5 can be taken out. Conversely, the installation of the screen frame 5 can be achieved by cooperating with the cam 522 and the cam 41.
[0029] In this embodiment, a slide groove 11 is provided on the front and rear sides of the inner wall of the support frame 1, and a plurality of slide rods 42 extending into the slide groove 11 are fixedly connected to the front and rear sides of the reciprocating frame 4. The reciprocating frame 4 performs reciprocating motion with the cooperation of the slide rods 42 and the slide groove 11.
[0030] In this embodiment, balls 43 are embedded on the outer wall and end of the slide rod 42 and contact the inner wall of the slide groove 11. The balls 43 reduce the friction between the slide rod 42 and the slide groove 11, and the reciprocating movement of the reciprocating frame 4 is smoother.
[0031] How to use and working principle of this device:
[0032] First, the black tea raw materials to be screened are put into the top screening frame 5, and the motor 7 drives the rotating shaft 81 to rotate. During the rotation of the rotating shaft 81, the gear II 84 rotates. Since the gear II 84 and the gear I 83 are meshed, the gear I 83 can be rotated and the connecting rod 86 is pulled through the shaft pin 85. The connecting rod 86 pulls the reciprocating frame 4. The reciprocating frame 4 performs reciprocating motion under the cooperation of the slide bar 42 and the slide groove 11, thereby driving the screen 6 in the screening frame 5 to move back and forth. As the screen 6 is screened, larger black tea is retained and smaller black tea and impurities fall. Since the apertures of the multiple screens 6 from top to bottom gradually become smaller from top to bottom, the bottom screen 6 is covered by the closing plate 9, thereby realizing one-time multi-stage screening, which can separate the black tea leaves into particles of different sizes. Black tea of different sizes is located in different screening frames 5;
[0033] After the screening is completed, the handle 51 is held and the pull ring 527 is pulled. The pull ring 527 pulls the insertion rod 522 through the pull rope 526. The insertion rod 522 moves and separates from the socket 41. The screening frame 5 can be taken out and the black tea inside it can be taken out for the next process. The particles of black tea in each screening frame 5 are similar in size, ensuring the uniformity of the particles of the final product. Different black tea leaves can be classified according to market demand, and tea of different grades and flavors can be produced to meet the needs of different consumers.
[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.
Claims
1. A multi-stage screening device for black tea processing, characterized in that: The invention comprises a plurality of support frames (1), wherein the plurality of support frames (1) are arranged from top to bottom and fixedly connected to each other, a bearing plate (2) is fixedly connected to the left side of the support frame (1), a plurality of support legs (3) for supporting are fixedly arranged below the bottom support frame (1) and the bearing plate (2), a reciprocating frame (4) is slidably arranged on the inner side of each support frame (1), an opening is arranged on the right side of the reciprocating frame (4), a screening frame (5) is inserted into the right side of the reciprocating frame (4) through the opening, a screen (6) is fixedly connected to the inner side of the screening frame (5), a motor (7) is fixedly installed below the bottom bearing plate (2), and a driving mechanism (8) is arranged between the output shaft of the motor (7) and the plurality of reciprocating frames (4).
2. The multi-stage screening device for black tea processing according to claim 1, characterized in that: The aperture of the screen (6) gradually decreases from top to bottom, and a closing plate (9) covering the screen (6) is fixedly connected to the bottom of the screening frame (5) at the bottom.
3. The multi-stage screening device for black tea processing according to claim 1, characterized in that: The driving mechanism (8) comprises a rotating shaft (81) rotatably arranged between a plurality of supporting plates (2), the bottom end of the rotating shaft (81) is connected to the output shaft of the motor (7), a fixed shaft (82) is fixedly arranged on the top of the supporting plate (2), a gear I (83) is rotatably arranged on the outer wall of the fixed shaft (82), a gear II (84) meshing with the gear I (83) is fixedly sleeved on the outer wall of the rotating shaft (81), an axle pin (85) is fixedly arranged on the top of the gear I (83), a connecting rod (86) is hingedly installed on the axle pin (85), and the other end of the connecting rod (86) passes through the supporting frame (1) and is hingedly connected to the reciprocating frame (4).
4. The multi-stage screening device for black tea processing according to claim 1, characterized in that: A handle (51) is fixedly provided on the right side of the screening frame (5), an elastic latch (52) is fixedly provided on the right side of the inner wall of the screening frame (5), and sockets (41) are provided on the top and bottom of the reciprocating frame (4), and the screening frame (5) is connected by plugging and fitting the elastic latch (52) and the socket (41).
5. The multi-stage screening device for black tea processing according to claim 4, characterized in that: The elastic latch (52) includes a fixed cylinder (521) fixedly connected to the inner side of the screening frame (5); the top and bottom ends of the fixed cylinder (521) are respectively provided with an insertion rod (522) that can be inserted into the insertion hole (41); the outer wall of the insertion rod (522) is fixedly sleeved with a slide plate (523) that is slidably arranged in the fixed cylinder (521); the inner wall of the fixed cylinder (521) is fixedly connected with a fixing ring (524); a spring (525) sleeved on the outer side of the insertion rod (522) is fixedly connected between the fixing ring (524) and the slide plate (523); the end of the insertion rod (522) passes through the fixing ring (524) and is connected to a pull rope (526); and a pull ring (527) connected to the pull rope (526) is provided on the outer side of the screening frame (5).
6. The multi-stage screening device for black tea processing according to claim 1, characterized in that: The front and rear sides of the inner wall of the support frame (1) are both provided with sliding grooves (11), and the front and rear sides of the reciprocating frame (4) are both fixedly connected with a plurality of sliding rods (42) extending into the sliding grooves (11).
7. The multi-stage screening device for black tea processing according to claim 6, characterized in that: Rolling balls (43) that contact the inner wall of the sliding groove (11) are embedded on the outer wall and end of the sliding rod (42).