Tea leaf grading and sorting machine

Abstract

The utility model discloses a kind of tea grading screening machines, including the screening machine body for screening tea, two groups of screen plate for screening tea are provided on the screening machine body, further include: symmetric and slidingly connected on the screening machine body connecting plate, two groups of connecting plate are all rotationally connected with mounting plate, and mounting plate is fixed with connecting plate by limiting member;Symmetric sliding on the mounting plate bracket.The utility model drives connecting plate along slide rail sliding by driving motor drive screw, cooperate the multiple groups of staggered arrangement knocking rod of knocking part and spring elastic knocking structure, and the flexible cleaning brush of cleaning part, realize the automation cleaning of screen surface and screen hole blockage, both avoid screen plate scratch and operation efficiency problem caused by artificial cleaning to be low, also through the double protection of elastic knocking and flexible cleaning, prolong the service life of screen plate, reduce equipment maintenance cost.

Description

Technical Field

[0001] This utility model relates to the technical field, and more specifically, to a tea grading and screening machine. Background Technology

[0002] As a traditional economic crop and an important export agricultural product in my country, the quality grading of tea directly determines its final price and market positioning. On the one hand, different grades of tea differ significantly in their leaf shape and particle size. Premium tea needs to maintain intact leaves to meet the demands of the high-end tea market, while grade three and below are mostly used in deep processing fields such as tea bags and tea powder. Grading and screening are the core steps to achieve "high quality, high price." On the other hand, if tea is mixed in grades after processing, it will seriously affect the brewing taste (e.g., too much broken tea will cause the tea soup to be cloudy), reducing the consumer experience. Therefore, grading and screening are necessary to separate tea leaves of different particle sizes to ensure the consistency of products of all grades.

[0003] Currently, most tea factories use traditional three-layer rigid screen vibrating screening machines for grading. This equipment consists of a frame, a single-layer feed hopper, three layers of metal screens (with apertures of 10mm, 6mm, and 3mm from top to bottom), and a single vibrating motor. During operation, workers pour the tea leaves to be screened directly into the top feed hopper, where the leaves fall to the top metal screen under gravity. The single vibrating motor drives the screen to vibrate in a circular motion, causing tea leaves larger than 10mm to slide along the top screen into the first discharge port (grade 1 tea). Tea leaves of 6-10mm pass through the top screen to the middle screen and then slide into the second discharge port (grade 2 tea). Tea leaves of 3-6mm pass through the middle screen to the bottom screen and then slide into the third discharge port (grade 3 tea). Tea dust smaller than 3mm falls through the bottom screen into the receiving box. If screen blockage occurs during the screening process, the machine must be stopped manually, and the screen apertures must be repeatedly cleaned with a brush. After cleaning, the equipment is restarted to continue operation.

[0004] During equipment operation, certain problems exist. Tea leaves continuously stick and clog the screen. Moist tea leaves may adhere to the screen surface and the inner wall of the pores, sticking to subsequent tea leaves and forming a clogging structure. This not only causes tea leaves to be trapped and aggravates mixing, but also requires repeated manual cleaning, which reduces the equipment's operating rate, easily scratches the screen, shortens its lifespan, and increases maintenance costs. Therefore, we urgently need a tea grading and screening machine to solve the above problems. Utility Model Content

[0005] One objective of this invention is to provide a new technical solution for a tea grading and screening machine. By rotating the mounting plate around the connecting plate, the striking part and the cleaning part can be quickly switched. Combined with the automatic moving structure driven by the drive motor, the sieve plate blockage can be automatically cleaned without manual intervention, thus improving work efficiency. Furthermore, the sliding groove of the bracket and the height adjustment of the adjustment hole, combined with the elastic striking rod and the flexible cleaning brush, can adapt to the characteristics of different teas, avoid damage to the sieve plate, and extend its service life.

[0006] According to a first aspect of the present invention, a tea grading and screening machine is provided, comprising a screening machine body for screening tea leaves, wherein the screening machine body is provided with two sets of sieve plates for screening tea leaves, and further comprising: connecting plates symmetrically and slidably connected to the screening machine body, wherein mounting plates are rotatably connected to both sets of connecting plates, and the mounting plates are fixed to the connecting plates by limiting members; and brackets symmetrically sliding on the mounting plates, wherein one set of brackets is provided with a striking part for tapping the sieve plates, and the other set of brackets is detachably installed with a cleaning part for cleaning the sieve plates.

[0007] Optionally, the screening machine body is symmetrically provided with slide rails above the screen plate, one set of slide rails is internally threaded with a lead screw, one set of connecting plates is slidably connected in the slide rails, and another set of connecting plates is threadedly connected to the lead screw. The screening machine body is fixedly connected with a drive motor for driving the lead screw to rotate, and the output end of the drive motor is fixedly connected to the end of the lead screw.

[0008] Optionally, the limiting component includes a limiting rod that is symmetrically and threadedly connected to the mounting plate. A limiting groove is formed on the connecting plate at the position corresponding to the limiting rod. When the limiting rod and the limiting groove are coaxial, the limiting rod is threadedly connected in the limiting groove and forms a limiting area.

[0009] Optionally, the mounting plate has a sliding groove in the middle for the bracket to slide in, the bracket is slidably connected in the sliding groove, and the bracket is symmetrically equipped with adjustment holes for adjusting the height. When the bracket is adjusted to the required position, the adjustment holes are locked to the mounting plate by bolts.

[0010] Optionally, the striking part includes a placement groove formed on a support, and a striking rod for striking the screen plate is provided on the support. A spring is provided between the striking rod and the placement groove, and the two ends of the spring are respectively connected to the striking rod and the inner wall of the placement groove. When the striking rod moves, the striking rod and the spring strike the surface of the screen plate.

[0011] Optionally, the number of placement slots is multiple sets, and the multiple sets of placement slots are equidistant and staggered along the length direction of the support.

[0012] Optionally, the cleaning section includes a fixing plate bolted to a bracket, on which a cleaning brush for cleaning the screen plate is fixedly mounted, forming a cleaning zone when the cleaning brush comes into contact with the surface of the screen plate.

[0013] Optionally, the ratio of the sieve aperture diameters of the two sets of sieve plates is 2:1.

[0014] 1. According to one embodiment of this disclosure, the tea grading and screening machine drives the connecting plate to slide along the slide rail by driving the lead screw of the drive motor. With the help of multiple sets of staggered knocking rods and spring elastic knocking structure of the knocking part, as well as the flexible cleaning brush of the cleaning part, the machine realizes the automated cleaning of the screen plate surface and screen hole blockage. This avoids the problems of screen plate scratches and low work efficiency caused by manual cleaning. Furthermore, the dual protection of elastic knocking and flexible cleaning extends the service life of the screen plate and reduces equipment maintenance costs.

[0015] 2. According to one embodiment of this disclosure, the tea grading and screening machine achieves rapid switching between the striking part and the cleaning part through the rotating structure of the mounting plate around the connecting plate and the fixed cooperation of the limiting rod and the limiting groove. At the same time, combined with the sliding adjustment of the bracket along the sliding groove and the height adjustment function of the adjustment hole, the working position and angle can be flexibly adjusted according to different working conditions such as the degree of tea adhesion and the thickness of the screen plate, so as to adapt to the grading and screening needs of various teas such as green tea and black tea, and greatly improve the versatility and operational adaptability of the equipment.

[0016] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of a tea grading and sorting machine in one embodiment; Figure 2 This is a partial structural diagram of a tea grading and sorting machine in one embodiment; Figure 3 This is a schematic diagram of the support frame and lead screw assembly structure of a tea grading and screening machine in one embodiment; Figure 4 This is a schematic diagram of the support structure of a tea grading and sorting machine in one embodiment; Figure 5 One embodiment of a tea grading and sorting machine Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a partially enlarged structural schematic diagram of a tea grading and screening machine in one embodiment.

[0019] The following are marked in the diagram: 1. Screening machine body; 2. Screen plate; 3. Connecting plate; 4. Mounting plate; 5. Bracket; 6. Slide rail; 7. Lead screw; 8. Drive motor; 9. Limiting rod; 10. Limiting groove; 11. Sliding groove; 12. Adjusting hole; 13. Placement groove; 14. Striking rod; 15. Spring; 16. Fixing plate; 17. Cleaning brush. Detailed Implementation

[0020] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0021] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0022] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0023] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0024] like Figure 1-6 As shown, a tea grading and screening machine includes a screening machine body 1 for screening tea leaves. The screening machine body 1 is provided with two sets of sieve plates 2 for screening tea leaves, and the ratio of the sieve hole diameter of the two sets of sieve plates 2 is 2:1.

[0025] Here, the ratio of the screen hole diameters of the two sets of screen plates 2 is 2:1, which can achieve two-stage precise grading of tea leaves, avoid mixing of tea leaves of different particle sizes, and solve the problem of low grading accuracy of traditional equipment. Compared with a single screen plate, two-stage grading can adapt to more tea processing scenarios and improve the versatility of the equipment. It should be noted that, for example, if the screen hole diameter of the upper screen plate 2 is 4mm, then the screen hole diameter of the lower screen plate 2 is 2mm. At the same time, the screen plates 2 are made of wear-resistant metal material, and with the protective design of the subsequent striking part and cleaning part, the service life is further extended.

[0026] It also includes connecting plates 3 that are symmetrically and slidably connected to the screening machine body 1. Mounting plates 4 are rotatably connected to both sets of connecting plates 3. Slide rails 6 are symmetrically arranged on the screening machine body 1 and above the screen plate 2. One set of slide rails 6 is internally threaded with a lead screw 7. One set of connecting plates 3 is slidably connected inside the slide rail 6, and the other set of connecting plates 3 is threadedly connected to the lead screw 7. A drive motor 8 for driving the lead screw 7 to rotate is fixedly connected to the screening machine body 1, and the output end of the drive motor 8 is fixedly connected to the end of the lead screw 7.

[0027] Here, the drive motor 8 drives the lead screw 7 to rotate, causing the two sets of connecting plates 3 to slide synchronously along the slide rail 6, thereby realizing the automatic movement of the striking part and the cleaning part along the length of the screen plate 2. There is no need for manual pushing of functional components such as the bracket 5, which completely replaces manual cleaning and striking operations and greatly improves the equipment's operating rate. The cooperation between the lead screw 7 and the slide rail 6 ensures stable transmission and guarantees the uniformity of the action of the striking rod 14 and the cleaning brush 17 on the screen plate 2, avoiding local blockage or surface damage to the screen plate 2 caused by uneven manual operation.

[0028] Mounting plate 4 is fixed to connecting plate 3 by limiting members. The limiting members include limiting rods 9 that are symmetrically threaded onto mounting plate 4. Limiting grooves 10 are formed on connecting plate 3 at positions corresponding to the limiting rods 9. When the limiting rods 9 and the limiting grooves 10 are coaxial, the limiting rods 9 are threaded into the limiting grooves 10 and form a limiting area.

[0029] Here, the mounting plate 4 can rotate around the connecting plate 3, enabling quick switching between the striking section and the cleaning section. When the surface of the sieve plate 2 is lightly sticky, the mounting plate 4 is rotated so that the striking section corresponds to the sieve plate 2, and the sticky tea leaves are shaken off by the striking rod 14. When there are more debris remaining on the surface of the sieve plate 2, the mounting plate 4 is rotated to switch to the cleaning section, and the sieve plate 2 is cleaned by the cleaning brush 17. No additional disassembly or installation of parts is required, which improves work efficiency.

[0030] Furthermore, the cooperation between the limiting rod 9 and the limiting groove 10 can fix the rotation angle of the mounting plate 4, preventing the knocking part or cleaning part from being misaligned with the screen plate 2 due to the offset of the mounting plate 4 during equipment operation, thus ensuring operational stability. In addition, the rotating structure facilitates the maintenance and replacement of components such as the knocking rod 14 and the cleaning brush 17 after the equipment is stopped, improving the convenience of equipment operation and maintenance.

[0031] The bracket 5 slides symmetrically on the mounting plate 4. The mounting plate 4 has a sliding groove 11 in the middle for the bracket 5 to slide. The bracket 5 is slidably connected in the sliding groove 11. The bracket 5 is symmetrically equipped with adjustment holes 12 for adjusting the height. When the bracket 5 is adjusted to the required position, the adjustment holes 12 are locked to the mounting plate 4 by bolts.

[0032] Here, the bracket 5 can slide along the sliding groove 11 to adjust the position of the striking part and the cleaning part in the width direction of the sieve plate 2, ensuring that there are no dead corners in the edge area of ​​the sieve plate 2; the adjustment hole 12 and the bolt can flexibly adjust the height of the bracket 5, so that the striking rod 14 can accurately fit the surface of the sieve plate 2 under the action of the spring 15, or keep the cleaning brush 17 at a suitable cleaning pressure. For sieve plates 2 of different thicknesses or tea leaves of different stickiness, the striking force and cleaning pressure can be controlled by adjusting the height, which can ensure the clogging and cleaning effect, avoid excessive striking or squeezing to damage the sieve plate 2, and extend the service life of the sieve plate 2.

[0033] One set of supports 5 is provided with a striking part for striking the screen plate 2. The striking part includes a placement groove 13 opened on the support 5. The support 5 is provided with a striking rod 14 for striking the screen plate 2. A spring 15 is provided between the striking rod 14 and the placement groove 13. The two ends of the spring 15 are respectively connected to the striking rod 14 and the inner wall of the placement groove 13. When the striking rod 14 moves, the striking rod 14 and the spring 15 strike the surface of the screen plate 2. There are multiple sets of placement grooves 13. The multiple sets of placement grooves 13 are equidistant and staggered along the length of the support 5.

[0034] Here, multiple sets of placement slots 13 are arranged equidistantly and staggered along the length of the support 5, so that multiple sets of striking rods 14 can fully cover the surface of the screen plate 2, avoiding blockage residue caused by un-striked areas; the setting of spring 15 realizes elastic striking, which, compared with rigid striking structure, can not only shake off the sticky tea leaves on the surface of the screen plate 2 and in the screen holes through vibration, effectively solving the blockage problem, but also buffer the impact force of striking rod 14 on screen plate 2, preventing scratches on the surface of screen plate 2 and reducing equipment maintenance costs; at the same time, the elastic reset function of spring 15 can keep striking rod 14 in continuous contact with screen plate 2 during movement, ensuring the continuity and stability of striking effect.

[0035] Another set of brackets 5 is detachably equipped with a cleaning part for cleaning the screen plate 2. The cleaning part includes a fixing plate 16 bolted to the bracket 5. A cleaning brush 17 for cleaning the screen plate 2 is fixedly installed on the fixing plate 16. When the cleaning brush 17 comes into contact with the surface of the screen plate 2, a cleaning area is formed.

[0036] Here, the cleaning brush 17 abuts against the surface of the sieve plate 2 to form a cleaning zone. Driven by the connecting plate 3, it moves along the sieve plate 2 to remove small tea leaves residue left after the tapping operation, further preventing clogging of the sieve holes and improving the thoroughness of cleaning. The fixing plate 16 is installed on the bracket 5 by bolts, which makes the cleaning brush 17 removable and replaceable. When the cleaning brush 17 is worn due to long-term use, there is no need to replace the entire bracket 5. Only the bolts on the fixing plate 16 need to be removed to replace the new cleaning brush 17, which greatly reduces maintenance costs.

[0037] Furthermore, the cleaning brush 17 is made of flexible nylon material, which can effectively avoid scratching the surface of the screen plate 2 compared to metal cleaning tools, thus effectively extending the service life of the screen plate 2.

[0038] In this invention, the operating function is selected according to the blockage of the screen plate 2. If knocking is required to remove the blockage, the mounting plate 4 is rotated so that the bracket 5 with the knocking part corresponds to the screen plate 2. If debris needs to be cleaned, the mounting plate 4 is rotated to switch to the bracket 5 with the cleaning part. After adjusting to the target position, the limiting rod 9 is made coaxial with the limiting groove 10, and the limiting rod 9 is screwed into the mounting plate 4 to prevent deviation during operation. The bracket 5 is slid along the sliding groove 11 to adjust the position of the knocking part or the cleaning part in the width direction of the screen plate 2 to ensure that the entire screen plate 2 is covered. The height of the bracket 5 is adjusted by adjusting the adjusting hole 12 and the bolt so that the knocking rod 14 touches the screen plate 2 lightly under the action of the spring 15, or so that the cleaning brush 17 maintains appropriate pressure on the surface of the screen plate 2. After adjustment, the bolt is tightened to fix the bracket 5.

[0039] When the equipment is running, start the drive motor 8. The drive motor 8 drives the lead screw 7 to rotate, which in turn drives the two sets of connecting plates 3 to move back and forth along the slide rail 6. When the striking part is working, the striking rod 14 moves with the bracket 5 and continuously strikes the sieve plate 2 through the elastic action of the spring 15, shaking off the sticky tea leaves and the tea leaves blocking the sieve holes. When the cleaning part is working, the cleaning brush 17 moves with the bracket 5 to brush away the residual debris on the surface of the sieve plate 2 to ensure that the sieve plate 2 is unobstructed. After the sieving operation is completed, turn off the drive motor 8. If the cleaning brush 17 is worn, remove the bolts on the fixing plate 16 to replace the cleaning brush 17. If the striking rod 14 needs to be maintained, loosen the limit rod 9 and rotate the mounting plate 4 to expose the striking part for inspection or replacement.

[0040] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A tea grading and screening machine, comprising a screening machine body (1) for screening tea leaves, wherein the screening machine body (1) is provided with two sets of sieve plates (2) for screening tea leaves, characterized in that: Also includes: The connecting plates (3) are symmetrically and slidably connected to the screening machine body (1). Both sets of connecting plates (3) are rotatably connected to mounting plates (4), and the mounting plates (4) are fixed to the connecting plates (3) by limiting members. The brackets (5) slide symmetrically on the mounting plate (4), one set of brackets (5) is provided with a striking part for tapping the screen plate (2), and the other set of brackets (5) is detachably installed with a cleaning part for cleaning the screen plate (2).

2. A tea grading machine as claimed in claim 1 wherein: The screening machine body (1) is symmetrically provided with slide rails (6) above the screen plate (2). One set of slide rails (6) is internally threaded with a lead screw (7). One set of connecting plates (3) is slidably connected inside the slide rails (6), and another set of connecting plates (3) is threadedly connected to the lead screw (7). The screening machine body (1) is fixedly connected with a drive motor (8) for driving the lead screw (7) to rotate, and the output end of the drive motor (8) is fixedly connected to the end of the lead screw (7).

3. A tea grading machine as claimed in claim 1 wherein: The limiting component includes a limiting rod (9) that is symmetrically and threadedly connected to the mounting plate (4). A limiting groove (10) is provided on the connecting plate (3) at the position corresponding to the limiting rod (9). When the limiting rod (9) and the limiting groove (10) are coaxial, the limiting rod (9) is threadedly connected in the limiting groove (10) and forms a limiting area.

4. A tea grading machine as claimed in claim 1 wherein: The mounting plate (4) has a sliding groove (11) in the middle for the bracket (5) to slide. The bracket (5) is slidably connected in the sliding groove (11). The bracket (5) is symmetrically equipped with adjustment holes (12) for adjusting the height. When the bracket (5) is adjusted to the required position, the adjustment holes (12) and the mounting plate (4) are locked together by bolts.

5. A tea grading machine as claimed in claim 1 wherein: The striking part includes a placement groove (13) opened on the support (5). The support (5) is provided with a striking rod (14) for striking the screen plate (2). A spring (15) is provided between the striking rod (14) and the placement groove (13). The two ends of the spring (15) are respectively connected to the striking rod (14) and the inner wall of the placement groove (13). When the striking rod (14) moves, the striking rod (14) and the spring (15) strike the surface of the screen plate (2).

6. A tea grading machine as claimed in claim 5 wherein: The number of placement slots (13) is multiple sets, and the multiple sets of placement slots (13) are equidistant and staggered along the length direction of the support (5).

7. A tea grading machine as claimed in claim 1 wherein: The cleaning section includes a fixing plate (16) bolted to a bracket (5), on which a cleaning brush (17) for cleaning the screen plate (2) is fixedly installed. When the cleaning brush (17) comes into contact with the surface of the screen plate (2), a cleaning area is formed.

8. A tea grading machine as claimed in claim 1 wherein: The ratio of the sieve hole diameters of the two sets of sieve plates (2) is 2:1.

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