A tea leaf sieving apparatus

Abstract

The utility model discloses a kind of tea leaf screening equipment, the utility model relates to tea processing technical field, scheme includes: a kind of tea leaf screening equipment, including: rack;Vibration support, vibration support is set in the upper portion of rack, and the inside of both sides of vibration support is all opened with sliding clamping groove along extension direction;Multiple vibration isolation components, multiple vibration isolation components are installed between rack and vibration support;Screening frame, the outside of both sides of screening frame is all set with clamping boss along extension direction, and clamping boss can be clamped into the inside of corresponding sliding clamping groove;At least one assembly channel, assembly channel is set in the end of vibration support;Limiting pin column, limiting pin column is at least partially located outside assembly channel, and limiting pin column is slidably matched with assembly channel;Elastic member, the inner wall of assembly channel is connected with one end of elastic member, and the other end of elastic member is connected with limiting pin column;Can realize screen frame quick disassembly cleaning, flexible adaptation different tea leaf screening demand.

Description

Technical Field

[0001] This utility model relates to the field of tea processing technology, specifically to a tea sieving device. Background Technology

[0002] Tea leaves are prone to acquiring various impurities during growth and processing, making sieving and impurity removal crucial for ensuring the quality of the finished product. When fresh leaves are picked, dust from the air, field mud, weed debris, and insect remains adhere to the leaves. Furthermore, tea processing often involves leaving the leaves unwashed to preserve their natural flavor, allowing these impurities to enter subsequent processes. During rolling and drying, broken tea leaves, hardened tea juice, and even equipment debris can be produced. If these impurities are not effectively removed, they will not only affect the taste and aroma of the tea, reducing its commercial value, but may also lead to hygiene and safety issues.

[0003] According to the authorization announcement number (CN221108929U), a sieving structure for removing impurities in black tea processing includes a sieve frame with an adjustment structure below it. The adjustment structure includes two sliding groove frames, and a controller and a rotating motor are respectively installed on the front of the sieve frame. In actual operation, the operator places the black tea to be processed on the placement shell and the sieve frame, and starts the rotating motor and the vibrating motor. The rotating motor drives the rotating frame to rotate, causing the tea leaves in the placement shell to be evenly dispersed onto the sieve frame; at the same time, the vibrating motor, in conjunction with the extension and retraction spring, causes the sieve frame to vibrate regularly. During this process, the tea leaves continuously bounce on the surface of the sieve frame, achieving automatic sieving. Fine impurities fall through the screen, while qualified tea leaves move along the sieve frame and are discharged, effectively improving the impurity removal efficiency and quality of black tea processing.

[0004] The structure disclosed in this patent has shortcomings in practical applications. Specifically, the sieve frame, as a core working component, is prone to retaining impurities such as broken tea leaves and tea dust after prolonged continuous operation, requiring regular cleaning to maintain sieving efficiency. However, the sieve frame and surrounding components are fixedly connected, lacking a detachable structure, which significantly increases the difficulty of cleaning and consumes a lot of time and labor costs. In addition, different types of tea have significant differences in shape and particle size (such as curly green tea and strip-shaped black tea). Due to the fixed specifications of the sieve frame, this structure is difficult to adapt to diverse sieving needs, limiting the versatility and application scenarios of the equipment, and failing to meet the demands of modern tea processing for efficient and flexible production. Utility Model Content

[0005] The purpose of this utility model is to provide a tea sieving device that addresses the problems of difficult cleaning and insufficient equipment versatility caused by the non-removable sieve frame in the existing technology. It proposes a solution that enables quick disassembly and cleaning of the sieve frame and flexibly adapts to different tea sieving needs.

[0006] This utility model is achieved through the following technical solution:

[0007] A tea sieving device includes: a frame; a vibrating support, which is disposed above the frame and has sliding grooves on the inner sides of both sides along the extending direction; multiple vibration isolation components, which are installed between the frame and the vibrating support; a sieving frame, which has engaging bosses on the outer sides of both sides along the extending direction, the engaging bosses being able to engage with the inner sides of corresponding sliding grooves; at least one assembly channel, which is disposed at the end of the vibrating support; a limiting pin, which is at least partially located outside the assembly channel and slides with the assembly channel; an elastic element, one end of which is connected to the inner wall of the assembly channel and the other end of which is connected to the limiting pin; and a vibration source assembly, which is mounted on the vibrating support.

[0008] Furthermore, in this utility model, the frame includes two oppositely arranged first mounting parts, on which vibration isolation components are installed, and the vertical height of the first mounting parts is H1; the frame includes two oppositely arranged second mounting parts, on which vibration isolation components are installed, and the vertical height of the second mounting parts is H2, where H2 is less than H1; the bottom end of the vibration bracket is connected to multiple vibration isolation components, and the vibration bracket is installed at an angle through the height difference of the multiple vibration isolation components.

[0009] Furthermore, in this utility model, the above also includes a stop; the stop is installed at one end of the sliding groove, and an assembly channel is provided at the other end of the sliding groove; wherein, the stop and the limiting pin form a limiting structure, which can limit the locking boss to be located in the sliding groove.

[0010] Furthermore, in this utility model, the aforementioned limiting pin includes a fixed connecting section and a movable connecting section, which are rotatably connected; the free end of the movable connecting section is provided with a guide slope, and in the natural state of the elastic element, the movable connecting section extends at least partially out of the assembly groove; when the screening frame is installed, the movable connecting section rotates relative to the fixed connecting section, and the guide slope moves away from the sliding groove; when the screening frame is removed, the movable connecting section rotates relative to the fixed connecting section, and the guide slope faces the sliding groove.

[0011] Furthermore, in this invention, the cross-section of the movable connecting section is polygonal, and the inner contour of the assembly channel is adapted to the outer contour shape of the movable connecting section; wherein, the movable connecting section can fully extend out of the assembly channel, thereby allowing the movable connecting section to rotate relative to the fixed connecting section.

[0012] Furthermore, in this utility model, the vibration source assembly includes a vibration motor, which is mounted at the bottom of the vibration bracket.

[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0014] 1. This application utilizes symmetrically arranged dual assembly channels at both ends of the vibrating support. Each assembly channel integrates a limiting pin and an elastic element, which, together with the snap-fit ​​bosses on both sides of the screening frame, form a bidirectional locking structure. Operators only need to press the limiting pins to quickly load and unload the screening frame without the need for tools. This design significantly reduces replacement time compared to traditional fixed screen frames, substantially improving the changeover efficiency for screening multiple specifications of tea leaves, and is particularly suitable for flexible production needs involving small batches and multiple varieties.

[0015] 2. This application designs the limiting pin as a structure in which a fixed connecting section and a movable connecting section are rotatably connected, and sets a guide slope at the free end of the movable connecting section. When the screening frame is installed, the movable connecting section rotates so that the guide slope moves away from the sliding slot. When the locking boss enters, the limiting pin is automatically compressed by the component force of the slope, without the need for manual pressing. When removing, the movable connecting section is rotated so that the guide slope faces the sliding slot. When the locking boss exits, it triggers automatic unlocking, completely solving the operational difficulty of pressing on both sides. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 A schematic diagram of a tea sieving device;

[0018] Figure 2 This is a schematic diagram of the connection between the frame and the vibration support;

[0019] Figure 3 This is a partial sectional view of the vibration support;

[0020] Figure 4 This is the left view of the screening frame;

[0021] Figure 5 This is a schematic diagram of the limiting pin structure.

[0022] The attached diagram shows the markings and corresponding component names:

[0023] 1-Frame, 2-Vibration bracket, 3-Vibration isolation component, 4-First mounting part, 5-Second mounting part, 6-Screening frame, 7-Vibration source component, 8-Sliding slot, 9-Limiting pin, 10-Stop, 11-Assembly channel, 12-Elastic component, 13-Snap-fit ​​boss, 14-Fixed connection section, 15-Modible connection section, 16-Guide slope. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0025] Example

[0026] Please refer to Figures 1 to 3 This utility model provides a tea sieving device. Its core structure includes a frame 1, a vibrating support 2, a vibration isolation component 3, a sieving frame 6, and a vibration source component 7. The vibrating support 2 is elastically supported above the frame 1 by a matrix of distributed vibration isolation components 3. Sliding grooves 8 are opened on the inner sides of both sides of the vibrating support 2 along the length direction. The outer sides of both sides of the sieving frame 6 are provided with snap-fit ​​bosses 13, which form a precise fit with the sliding grooves 8. When it is necessary to install the sieving frame 6, simply press the limiting pin 9 in the mounting channel 11 at the end of the vibrating support 2, so that the connected elastic element 12 (compression spring) is compressed until the limiting pin 9 is completely retracted into the mounting channel 11. At this time, align the snap-fit ​​bosses 13 on both sides of the sieving frame 6 with the sliding grooves 8 on both sides of the vibrating support 2. After the snap-fit ​​bosses 13 are fully in place, release the limiting pin 9. The elastic element 12 drives the pin to extend and press against the sieving frame 6, forming an anti-detachment limiting structure.

[0027] When the equipment is working, the vibration source component 7 is installed on the vibration support 2 and provides power. After starting, it drives the vibration support 2 to generate high-frequency reciprocating vibration. The matrix-distributed vibration isolation components 3 ensure the support can vibrate freely while reducing the transmission of vibration to the vibration support 2. Under the action of vibration, the screening frame 6 causes the tea particles to tumble continuously. The sieve holes of the screening frame 6 achieve grading according to the difference in particle size. The target tea leaves remain on the screening frame 6, while fine impurities fall through the screening frame 6. When it is necessary to clean or replace the screening frame 6, simply press the limit pin 9 repeatedly to quickly disassemble the screening frame 6. This quick-disassembly design not only facilitates daily cleaning and maintenance but also allows for the replacement of screening frames 6 with different sieve hole specifications, flexibly adapting to the screening needs of different types of tea such as Longjing and Pu'er, significantly improving the practicality and adaptability of the equipment.

[0028] To ensure the stability of the screening frame 6 during vibration, two symmetrical assembly slots 11 are provided on both sides of the vibrating support 2. Each slot integrates a double-end locking structure consisting of a limiting pin 9 and an elastic element 12. When the screening frame 6 is engaged, the limiting pins 9 on both sides extend synchronously under the action of the elastic element 12, respectively abutting against the locking bosses 13 at both ends of the screening frame 6. This prevents the screening frame 6 from axially shifting or detaching from the vibrating support 2 during vibration, ensuring that the screening frame 6 maintains a stable installation state during screening operations and providing a reliable structural guarantee for efficient tea screening.

[0029] It should be noted that the selection of vibration isolation component 3 must take into account both the equipment's vibration characteristics and operating conditions. Spring vibration isolators use metal helical springs or leaf springs, offering stable stiffness and high load-bearing capacity. They are suitable for low-to-medium frequency vibration scenarios and can maintain performance under changing static loads, often serving as the main support structure for large screening equipment. Rubber vibration isolators are molded from natural or synthetic rubber into cylindrical, conical, or other structures, possessing both elasticity and damping characteristics. They can absorb high-frequency vibrations and impacts, are wear-resistant, and easy to install, making them commonly used in small to medium-sized equipment. Air spring vibration isolators regulate stiffness through rubber air bladders and additional air chambers, offering high vibration isolation efficiency for low-frequency vibrations and are suitable for precision screening equipment.

[0030] Please refer to Figure 1 and Figure 2 In some embodiments of this application, the vertical height of the two first mounting parts 4 is H1, and the vertical height of the two second mounting parts 5 is H2, where H2 is less than H1. Each mounting part is fitted with a vibration isolation component 3 and connected to the bottom of the vibration support 2. The height difference between H1 and H2 causes the vibration support 2 to be installed at an angle, simultaneously causing the screening frame 6 to tilt. During screening, tea leaves are added from the higher end of the screening frame 6. Driven by the vibration source component 7, the screening frame 6 vibrates, causing the tea leaves to be conveyed from the higher to the lower position along the inclined surface. Simultaneously, the sieve holes of the screening frame 6 screen the tea leaves. The target tea leaves roll down the inclined surface to the lower end for collection, while fine impurities fall through the sieve holes of the screening frame 6, achieving integrated screening and conveying operations. This inclined installation structure utilizes gravity to assist material flow, improving screening efficiency and simplifying the tea leaf collection process, making it particularly suitable for continuous production scenarios.

[0031] Please refer to Figure 2 and Figure 3 In some embodiments of this application, a stopper 10 is installed at one end of the sliding groove 8, and an assembly channel 11 is correspondingly provided at the other end. The stopper 10 and the limiting pin 9 together constitute a bidirectional limiting structure, used to limit the locking boss 13 within the sliding groove 8. When the vibrating bracket 2 is connected to the screening frame 6, the locking bosses 13 on both sides of the screening frame 6 need to be aligned with the sliding grooves 8 on both sides of the vibrating bracket 2. The locking bosses 13 slide along the extension direction of the sliding groove 8. The locking bosses 13 first pass through the area of ​​the assembly channel 11 until the front end of the locking bosses 13 abuts against the limiting surface of the stopper 10. At this time, the limiting pin 9 is at least partially ejected from the assembly channel 11 under the restoring force of the elastic member 12, and the end of the limiting pin 9 forms a tight abutment with the rear end of the locking boss 13. This bidirectional limiting structure, consisting of a stop stop 10 and a limiting pin 9, can effectively lock the locking boss 13 in the sliding groove 8. Even if the screening frame 6 is in an inclined installation state, the limiting effect at both ends can prevent the screening frame 6 from axially shifting, ensuring the stability of the frame position during screening operations.

[0032] In some embodiments of this application, the limiting pin 9 includes a fixed connecting section 14 and a movable connecting section 15, which are rotatably connected by a rotating pin. The free end of the movable connecting section 15 is provided with a guide slope 16. When the elastic member 12 is in its natural state, at least a portion of the movable connecting section 15 extends out of the assembly groove 11. When the screening frame 6 needs to be installed, the movable connecting section 15 is rotated relative to the fixed connecting section 14, so that the guide slope 16 is in a direction away from the sliding groove 8; when the screening frame 6 needs to be removed, the movable connecting section 15 is rotated relative to the fixed connecting section 14, so that the guide slope 16 is in a direction towards the sliding groove 8.

[0033] Specifically, the limiting pin 9 consists of a fixed connecting section 14 and a movable connecting section 15. The fixed connecting section 14 is connected to the elastic element 12, and at least part of the movable connecting section 15 extends out of the assembly groove 11, with a guide slope 16 at its free end. During the process of installing the screening frame 6 into the vibrating bracket 2, the guide slope 16 of the movable connecting section 15 is rotated to face away from the sliding groove 8. In this way, when the locking boss 13 of the screening frame 6 begins to enter the sliding groove 8 of the vibrating bracket 2, the locking boss 13 can form a guiding engagement with the guide slope 16 of the movable connecting section 15. At this time, the pressure of the locking boss 13 on the guide slope 16 can be decomposed into a component force towards the assembly groove 11, thereby allowing the movable connecting section 15 to drive the limiting pin 9 to retract into the assembly groove 11. In this way, the locking boss 13 can smoothly enter the sliding groove 8 without the operator having to manually press the limiting pin 9. After the engaging boss 13 is fully inserted into the sliding groove 8, the movable connecting section 15, under the action of the elastic element 12, at least partially pops out of the assembly channel 11, and the straight portion of the movable connecting section 15 will limit the engaging boss 13. When it is necessary to remove the screening frame 6, the movable connecting section 15 is rotated so that its guide slope 16 faces the sliding groove 8. In this way, when the engaging boss 13 exits the sliding groove 8, it can also cooperate with the guide slope 16 of the movable connecting section 15, solving the problem of the operator having to press two limiting pins 9 at the same time.

[0034] Please refer to Figure 5For example, the cross-section of the movable connecting section 15 is designed as a polygonal structure. The inner contour of the assembly channel 11 matches the outer contour of the movable connecting section 15. When the elastic element 12 is in its normal state, the movable connecting section 15 is at least partially located within the assembly channel 11. At this time, the polygonal contour of the movable connecting section 15 matches the inner contour of the assembly channel 11, restricting the movable connecting section 15 from rotating in the circumferential direction. This ensures that the guide slope 16 of the movable connecting section 15 maintains an accurate position and prevents the guide slope 16 from rotating without human intervention. When it is necessary to adjust the spatial position of the guide slope 16, the operator can pull the movable connecting section 15 to stretch the elastic element 12 and simultaneously move the movable connecting section 15 completely out of the assembly channel 11. At this time, the movable connecting section 15 is freed from the constraint of the assembly channel 11 and can rotate relative to the fixed connecting section 14, thereby achieving the adjustment of the spatial position of the guide slope 16. After adjustment, the tension applied to the movable connecting section 15 is removed. Under the action of the elastic element 12, the movable connecting section 15 partially retracts into the assembly channel 11. The polygonal outline of the movable connecting section 15 then mates with the inner outline of the assembly channel 11, thus limiting the movement of the movable connecting section 15. Preferably, the cross-section of the movable connecting section 15 can be square. When the movable connecting section 15 rotates 180°, its square outline can still fit with the inner outline of the assembly channel 11, without affecting the retraction of the movable connecting section 15 into the assembly channel 11.

[0035] Please refer to Figure 2 In some embodiments of this application, the vibration source assembly 7 includes a vibration motor mounted at the bottom end of the vibration support 2. Specifically, the vibration motor provides vibration power to the vibration support 2. The vibration motor generates centrifugal force through its own rotation, thereby driving the vibration support 2 to vibrate, thus achieving the sieving operation of the tea leaves. This structural design, which mounts the vibration motor at the bottom end of the vibration support 2, allows the vibration power to be transmitted more directly to the vibration support 2, improving energy transfer efficiency and ensuring the smooth operation of the sieving process.

[0036] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A tea sieving device, characterized in that, include: Rack (1); Vibration bracket (2), the vibration bracket (2) is disposed above the frame (1), and sliding slots (8) are provided on the inner sides of both sides of the vibration bracket (2) along the extension direction; Multiple vibration isolation components (3) are installed between the frame (1) and the vibration support (2); Screening frame (6), both sides of the screening frame (6) are provided with snap-fit ​​protrusions (13) along the extension direction, and the snap-fit ​​protrusions (13) can be snapped into the inner side of the corresponding sliding slot (8); At least one assembly channel (11) is provided at the end of the vibration support (2); A limiting pin (9) is located at least partially outside the assembly channel (11), and the limiting pin (9) is in sliding engagement with the assembly channel (11). An elastic element (12) is provided, one end of which is connected to the inner wall of the assembly channel (11), and the other end of which is connected to the limiting pin (9). Vibration source assembly (7) is mounted on the vibration support (2).

2. The tea sieving equipment according to claim 1, characterized in that, The frame (1) includes two oppositely arranged first mounting parts (4), on which the vibration isolation assembly (3) is mounted, and the vertical height of the first mounting part (4) is H1; The frame (1) includes two oppositely arranged second mounting parts (5), on which the vibration isolation assembly (3) is mounted. The vertical height of the second mounting part (5) is H2, and H2 is less than H1. The bottom end of the vibration bracket (2) is connected to a plurality of vibration isolation components (3), and the vibration bracket (2) is installed at an angle through the height difference of the plurality of vibration isolation components (3).

3. The tea sieving equipment according to claim 2, characterized in that, It also includes a stop (10); The stop (10) is installed at one end of the sliding slot (8), and the assembly channel (11) is provided at the other end of the sliding slot (8); The stop (10) and the limiting pin (9) form a limiting structure, which can limit the locking boss (13) within the sliding groove (8).

4. The tea sieving equipment according to any one of claims 1 to 3, characterized in that, The limiting pin (9) includes a fixed connecting section (14) and a movable connecting section (15), which are rotatably connected. The free end of the movable connecting section (15) is provided with a guide slope (16), and in the natural state of the elastic member (12), the movable connecting section (15) extends at least partially out of the assembly channel (11); When the screening frame (6) is installed, the movable connecting section (15) rotates relative to the fixed connecting section (14), and the guide slope (16) moves away from the sliding groove (8); When the screening frame (6) is removed, the movable connecting section (15) rotates relative to the fixed connecting section (14), and the guide slope (16) faces the sliding groove (8).

5. The tea sieving equipment according to claim 4, characterized in that, The cross-section of the movable connecting section (15) is polygonal, and the inner contour of the assembly channel (11) is adapted to the outer contour shape of the movable connecting section (15). The movable connecting section (15) can extend fully out of the assembly channel (11), thereby allowing the movable connecting section (15) to rotate relative to the fixed connecting section (14).

6. The tea sieving equipment according to claim 1, characterized in that, The vibration source assembly (7) includes a vibration motor, which is installed at the bottom of the vibration bracket (2).

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