Automatic screen scraping machine for refined tea leaf reverse screening

Abstract

The application belongs to the technical field of tea, and particularly relates to a refined tea leaf reverse sifting automatic sifter scraping machine, which comprises a support frame formed by a plurality of support units, adjacent support units are connected through connecting rods, a guide rod is fixed on the top horizontal rod of each support unit through locking pieces, a guide groove is formed in the bottom of the guide rod, pulleys one and two are arranged at the two ends of the guide rod respectively, the pulley one and the pulley two are connected through one transmission rope, a sliding seat is located below the guide rod and is in sliding guide cooperation with the guide groove, one end of the sliding seat is fixedly connected with the transmission rope, and the other end is in sliding guide cooperation with the other side of the transmission rope, a scraper is fixed at the bottom of the sliding seat, a speed reducer is fixed on one side of the support frame and used for driving the pulley two to rotate, and a winding assembly is fixed on the support frame and used for adjusting the tension degree of the transmission rope. The application can solve the problem that the transmission rope is prone to relaxation after long-term use, leading to unstable transmission, and has a good market application prospect.

Description

Technical Field

[0001] This invention belongs to the field of tea technology, specifically relating to an automatic scraping sieve machine for refining tea leaves. Background Technology

[0002] In the tea processing, sieving is an important step. Its purpose is to classify the tea leaves according to their particle size through sieving, while removing tea dust and impurities to improve the quality and consistency of the tea.

[0003] In actual production, there are situations where tea leaves cannot pass through the sieve and require manual scraping and cleaning. Manually scraping the sieve surface with a hand-held scraper is labor-intensive, inefficient, and unsuitable for large-scale production. Some existing semi-automatic scraping and sieving equipment uses a motor and rope to drive the scraper back and forth, replacing manual scraping. However, the drive rope (such as steel wire rope or nylon rope) is prone to sagging and shaking under its own weight and during operation when laid over long distances. It is also prone to loosening after long-term use, leading to unstable transmission, affecting sieving efficiency, and easily damaging equipment components that work with the drive rope. Therefore, this application provides an automatic scraping and sieving machine for refined tea leaves, enabling adjustable drive rope tension to ensure stable operation of the sieving process.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic scraping sieve machine for refining tea leaves, in order to solve the problem that the transmission rope is prone to loosening after long-term use, resulting in unstable transmission.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An automatic scraping sieve machine for refining tea leaves includes: The support frame is composed of multiple support units connected together; adjacent support units are connected by connecting rods. The guide rod is fixed to the top crossbar of each support unit by a locking device, and a guide groove is provided at its bottom; the two ends of the guide rod are respectively provided with pulley one and pulley two, and pulley one and pulley two are connected by a transmission rope. A slide block is located below the guide rod and slides in a guide groove; one end of the slide block is fixedly connected to the transmission rope, and the other end slides in a guide groove with the other side of the transmission rope. The scraper is fixed to the bottom of the slide block; A geared motor is fixed to one side of the support frame and is used to drive the second pulley to rotate; The winding assembly, fixed on the support frame, is used to adjust the tension of the transmission rope.

[0007] Preferably, the locking member is L-shaped, with its bottom horizontal plate welded to the guide rod; the top of the locking member is fixed to the horizontal bar of the support unit by bolts.

[0008] Preferably, the slide includes a sliding plate and rollers; the sliding plate is located outside the guide groove, and a mounting plate is provided on its top; the mounting plate enters the guide groove; the rollers are located in the guide groove and are rotatably connected to both sides of the mounting plate; both sides of the sliding plate are bent downward to form a hook-shaped part, and the transmission rope passes through the middle of the hook-shaped part; a clamping sleeve is provided inside the hook-shaped part on one side, and both ends of the clamping sleeve extend out of the hook-shaped part and are provided with locking nuts that are threadedly engaged with it.

[0009] Preferably, two positioning frames are symmetrically arranged above the scraper, and a connecting plate is provided between the two positioning frames; a guide post is provided inside the positioning frame; the middle of the upper surface of the connecting plate is connected to the bottom of the slide block through a connecting post, and its two ends respectively enter the corresponding positioning frames and slide and guide each other with the corresponding guide post; a compression spring is sleeved on the guide post, the bottom of the compression spring abuts against the upper surface of the scraper and the top abuts against the lower surface of the connecting plate.

[0010] Preferably, a first pulley is provided on the output shaft of the geared motor, and a second pulley is provided above the rotating shaft of the second pulley; the first pulley and the second pulley are connected by a belt.

[0011] Preferably, the winding assembly includes a support plate, a pad, a first winding reel, a second winding reel, a third pulley, and a steering box; the support plate and the pad are fixed on the same support unit; the first winding reel and the second winding reel are stacked vertically, with a partition in the middle; a rotating rod is provided through the partition, and the two ends of the rotating rod are rotatably connected to the support plate and the pad respectively; the rotating rod is interference-fitted with the middle of the first winding reel and the second winding reel; the third pulley is disposed on one side of the partition; the steering box is disposed on the support plate, one end of the transmission rope enters the steering box, extends out after turning, then passes through the first winding reel, the third pulley, and the second winding reel in sequence, and then enters the steering box again, extends out after turning, and connects to the second pulley.

[0012] Preferably, a cylindrical handle is provided on one side of the partition. When the handle is rotated, the first winding reel and the second winding reel simultaneously wind up or unwind the rope. An L-shaped limiting plate is provided on the support foot of the support unit. One end of the limiting plate has a limiting hole for the handle to pass through, and the other end slides and guides with a limiting groove on the support foot.

[0013] Preferably, the guide rod is provided with multiple rope-lifting assemblies at intervals. Each rope-lifting assembly includes a positioning plate and an n-shaped rope-lifting frame. The positioning plate is fixed to the guide rod by bolts, and a second guide post is provided above it. A second compression spring is sleeved on the outside of the second guide post, and an internal thread is provided in its middle. The top of the rope-lifting frame is provided with a clearance groove that slides and guides the second guide post. A limiting bolt that threads with the second guide post is provided above the clearance groove. The lower sides of the rope-lifting frame are bent inward to form a second hook-shaped part, and the inner contour of the second hook-shaped part is larger than the outer contour of the first hook-shaped part.

[0014] Preferably, the hook-shaped part 2 has a support part inside, and the two ends of the support part are set as inclined surfaces or arc surfaces.

[0015] Preferably, the support unit is provided with a fine-tuning component, including two L-shaped guide plates and a guide block; the guide block is disposed between the two guide plates, and its middle part is penetrated by the rotating shaft of the second pulley; a threaded rod is provided on the side of the guide block; an L-shaped fixing plate is fixed between the two guide plates by bolts, and the fixing plate has a clearance hole for the threaded rod to pass through; a nut is provided on the threaded rod and is threadedly engaged with it, and the nut is located on the side of the fixing plate away from the guide block.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The automatic scraping machine for refining tea leaves of the present invention, through the cooperation of a speed reduction motor and a transmission rope, can drive the scraper to move back and forth on the screen to realize the reversing of tea leaves. It can replace the manual scraping mode of manually holding the scraper and scraping back and forth on the screen surface, which is conducive to improving production efficiency, reducing the intensity of manual labor, and ensuring the consistency and continuity of the scraping action.

[0017] (2) The automatic scraping machine for refining tea leaves of the present invention uses a compression spring set above the scraper to cooperate with the connecting plate, so that the scraper can automatically adjust the downward pressure according to the actual situation of the sieve surface. This ensures thorough and uniform scraping, and effectively avoids damage to the tea leaves and sieve by the scraper, which is conducive to improving the quality of finished tea products and extending the service life of the sieve.

[0018] (3) The automatic scraping machine for refining tea leaves of the present invention can drive the first and second winding discs to rotate synchronously by turning the handle, thereby realizing the winding and unwinding of the transmission rope, thus quickly adjusting the tension of the transmission rope and avoiding the drooping and shaking of the transmission rope during the scraping operation; by setting the fine adjustment component, the position of the second pulley can also be adjusted along the direction of the guide plate, thereby realizing the fine adjustment of the tension of the transmission rope.

[0019] (4) The automatic scraping sieve machine for refining tea leaves of the present invention can provide multiple support points for the transmission rope arranged over a long distance by setting multiple lifting rope components at intervals on the guide rod, so as to avoid serious sagging and shaking of the transmission rope and ensure the smooth operation of the slide. At the same time, the inner contour of the hook-shaped part two of the lifting rope frame is larger than the outer contour of the hook-shaped part one of the slide, which can ensure that the slide can pass smoothly through the lifting rope component during the reciprocating motion without interference. Attached Figure Description

[0020] Figure 1 This is an external schematic diagram of an embodiment of the present invention; Figure 2 This is a side view of an embodiment of the present invention; Figure 3 This is a schematic diagram of the slide block according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the scraper according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the lifting rope assembly according to an embodiment of the present invention; Explanation of key figure labels: 1. Support unit; 2. Connecting rod; 3. Guide rod; 4. Locking element; 5. Pulley 1; 6. Pulley 2; 7. Transmission rope; 8. Slide seat; 9. Scraper; 10. Gear motor; 11. Sliding plate; 12. Roller; 13. Mounting plate; 14. Hook-shaped part 1; 15. Clamping sleeve; 16. Locking nut; 17. Positioning frame; 18. Connecting plate; 19. Guide post 1; 20. Connecting post; 21. Compression spring 1; 2 2. Belt pulley one; 23. Belt pulley two; 24. Belt; 25. Support plate; 26. Pad plate; 27. Winding reel one; 28. Winding reel two; 29. ​​Pulley three; 30. Steering box; 31. Partition plate; 32. Handle; 33. Limiting plate; 34. Positioning plate; 35. Lifting rope frame; 36. Guide post two; 37. Compression spring two; 38. Limiting bolt; 39. Hook-shaped part two; 40. Support part; 41. Fine adjustment component. Detailed Implementation

[0021] The technical solution of this invention patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

[0022] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] See attached document Figure 1-5 An automatic scraping sieve machine for refining tea leaves includes: a support frame, guide rods 3, a slide block 8, a scraper 9, a reduction motor 10, and a winding assembly. The support frame is composed of multiple support units 1 connected together, with adjacent support units 1 connected by connecting rods 2. Each support unit 1 includes four support legs, the tops of which are connected by two horizontal bars and two vertical bars, forming a stable frame structure.

[0025] In this embodiment, the guide rod 3 is fixed to the top crossbar of each support unit 1 by a locking member 4. The locking member 4 is L-shaped, with its bottom horizontal plate welded to the guide rod 3 and its top fixed to the crossbar of the support unit 1 by bolts. This connection method ensures the installation strength of the guide rod 3 and facilitates disassembly and maintenance. A guide groove is provided at the bottom of the guide rod 3, extending along the length of the guide rod 3. Pulley 5 and pulley 6 are respectively provided at both ends of the guide rod 3, and pulley 5 and pulley 6 are connected by a transmission rope 7 to form a complete transmission circuit.

[0026] The slide block 8 is located below the guide rod 3 and slides in a guide groove. (See attached diagram.) Figure 3The slide block 8 includes a sliding plate 11 and rollers 12. The sliding plate 11 is located outside the guide groove, and a mounting plate 13 is provided on its top. The mounting plate 13 extends upward into the guide groove. The rollers 12 are located inside the guide groove and are rotatably connected to both sides of the mounting plate 13 through bearings, allowing the slide block 8 to slide smoothly along the guide groove. Both sides of the sliding plate 11 are bent downward to form hook-shaped portions 14. The middle of the hook-shaped portions 14 allows the transmission rope 7 to pass through and slide in a guide engagement with the transmission rope 7. A clamping sleeve 15 is provided inside one of the hook-shaped portions 14. Both ends of the clamping sleeve 15 extend out of the hook-shaped portion 14 and are provided with locking nuts 16 that are threaded into it. When the transmission rope 7 passes through the clamping sleeve 15, tightening the locking nuts 16 causes the two ends of the clamping sleeve 15 to retract and clamp the transmission rope 7, thereby achieving a fixed connection between the slide block 8 and the transmission rope 7. When the transmission rope 7 is driven by the reduction motor 10 to move in a cycle, it can drive the slide block 8 to move back and forth along the guide groove.

[0027] In this embodiment, the scraper 9 is fixed below the slide block 8, and two positioning frames 17 are symmetrically arranged above it; see attached figure. Figure 4 A connecting plate 18 is provided between the two positioning frames 17. Inside the positioning frame 17 is a vertically upward guide post 19. The upper surface of the connecting plate 18 is connected to the bottom of the slide block 8 via a connecting post 20, with both ends entering the corresponding positioning frames 17 and slidingly guiding the corresponding guide posts 19. A compression spring 21 is fitted on the guide post 19, with its bottom abutting against the upper surface of the scraper 9 and its top abutting against the lower surface of the connecting plate 18. Under the elastic action of the compression spring 21, the scraper 9 is pushed downwards, maintaining appropriate contact pressure between its lower edge and the sieve surface. When there are local protrusions on the sieve surface or changes in the thickness of the tea leaves, the scraper 9 can float upwards along the guide post 19. At this time, the compression spring 21 is compressed, automatically adjusting the contact force between the scraper 9 and the sieve surface, avoiding damage to the tea leaves or the sieve mesh caused by hard squeezing. The positioning frame 17 guides and limits the up-and-down movement of the connecting plate 18, ensuring the stability of the scraper 9's movement trajectory.

[0028] The geared motor 10 is fixed to one side of the support frame, and a pulley 22 is mounted on its output shaft. A pulley 23 is mounted above the shaft of the pulley 6. The pulley 22 and pulley 23 are connected by a belt 24 to drive the pulley 6 to rotate. When the geared motor 10 starts, the pulley 22 drives the pulley 23 to rotate via the belt 24. The pulley 6 and pulley 23 rotate synchronously, thereby driving the transmission rope 7 to circulate, realizing the reciprocating scraping action of the slide block 8 and the scraper 9. The geared motor 10 can be controlled to rotate in both directions, or the scraper 9 can be reciprocated between the two ends of the guide rod 3 by setting limit devices such as limit switches.

[0029] The winding assembly is fixed on the support frame and is used to adjust the tension of the transmission rope 7. The winding assembly includes a support plate 25, a pad plate 26, a first winding reel 27, a second winding reel 28, a third pulley 29, and a steering box 30. The support plate 25 and the pad plate 26 are fixed on the same support unit 1, and are arranged parallel to each other and spaced apart vertically. The first winding reel 27 and the second winding reel 28 are stacked vertically, with a partition plate 31 in the middle. A rotating rod is provided through the partition plate 31, and the two ends of the rotating rod are rotatably connected to the support plate 25 and the pad plate 26 respectively through bearings. The rotating rod is interference-fitted with the middle of the first winding reel 27 and the second winding reel 28, so that the first winding reel 27 and the second winding reel 28 can rotate synchronously with the rotating rod. The third pulley 29 is located on one side of the partition plate 31 and is used to receive the transmission rope 7 between the first winding reel 27 and the second winding reel 28, and to guide and tension the transmission rope 7, so that the direction of the transmission rope 7 between the first winding reel 27 and the second winding reel 28 is more reasonable. The steering box 30 is mounted on the support plate 25 and contains multiple steering pulleys to change the direction of the transmission rope 7. Specifically, one end of the transmission rope 7 enters the steering box 30, undergoes a 90° turn under the action of the steering pulleys inside the steering box 30, and then extends out. It then passes through the first winding reel 27, the third pulley 29, and the second winding reel 28 in sequence, before entering the steering box 30 again, undergoing a turn, and finally connecting to the second pulley 6.

[0030] In this embodiment, a cylindrical handle 32 is provided on one side of the partition 31 to facilitate manual rotation of the two winding reels by the operator. When the handle 32 is rotated, winding reels 27 and 28 simultaneously wind or unwind the rope. When it is necessary to adjust the tension of the transmission rope 7, rotating the handle 32 drives winding reels 27 and 28 to rotate, causing the transmission rope 7 to be wound or released synchronously on the two winding reels, thereby changing the effective length of the transmission rope 7 during transmission and realizing the adjustment of tension.

[0031] An L-shaped limiting plate 33 is provided on the support foot of the support unit 1 for mounting the winding assembly. One end of the limiting plate 33 has a limiting hole for the handle 32 to pass through, and the other end slides and guides with a limiting groove on the support foot. After the transmission rope 7 is adjusted to a suitable tension, the limiting plate 33 is slid along the limiting groove so that the limiting hole can fit onto the handle 32, thereby restricting the rotation of the handle 32 and the winding reel and preventing the winding reel from rotating on its own during operation, which would cause changes in tension. When readjustment is needed, simply adjust the position of the limiting plate 33 to separate the handle 32 from the limiting plate 33.

[0032] On the other hand, multiple rope-lifting assemblies are spaced apart on the guide rod 3 to provide multi-point support for the transmission rope 7 and prevent it from sagging. The rope-lifting assembly includes a positioning plate 34 and an n-shaped rope-lifting frame 35; the positioning plate 34 is fixed to the guide rod 3 by bolts, and a guide post 36 is set on its top; a compression spring 37 is sleeved on the outside of the guide post 36, and an internal thread is opened in its middle; the top of the rope-lifting frame 35 has a clearance groove that slides and guides the guide post 36, and a limiting bolt 38 that threads with the guide post 36 is set above the clearance groove; the lower sides of the rope-lifting frame 35 are bent inward to form hook-shaped parts 39. The internal contour of the hook-shaped parts 39 is larger than the external contour of the hook-shaped parts 14, which can ensure that the hook-shaped parts 14 on both sides of the slide block 8 can pass smoothly through the internal space of the hook-shaped parts 39 without interference during the reciprocating motion.

[0033] Under the elastic action of the second compression spring 37, the lifting frame 35 is lifted upwards, and the second hook part 39 lifts the transmission rope 7 passing through it upwards, keeping the transmission rope 7 at an appropriate suspension height and preventing it from sagging due to its own weight. The operator can also adjust the height of the lifting frame 35 by turning the limiting bolt 38 in conjunction with the second compression spring 37. In addition, the second hook part 39 has a support part 40 inside, with both ends of the support part 40 being beveled or curved, making the contact of the transmission rope 7 on the support part 40 smoother and reducing friction and wear.

[0034] In this embodiment, a fine-tuning component 41 is also provided on the support unit 1 for adjusting the position of pulley 6, thereby fine-tuning the tension of the transmission rope 7. The fine-tuning component 41 includes two L-shaped guide plates and a guide block; the guide block is positioned between the two guide plates, with its central portion penetrated by the shaft of pulley 6, allowing pulley 6 to move with the guide block. A threaded rod is provided on the side of the guide block; an L-shaped fixing plate is fixed between the two guide plates by bolts, and the fixing plate has a clearance hole for the threaded rod to pass through; a nut is provided on the threaded rod, with the nut located on the side of the fixing plate away from the guide block. When fine-tuning of the tension of the transmission rope 7 is required, the operator rotates the nut, causing the threaded rod to move and slide the guide block and pulley 6 between the guide plates, thus fine-tuning the tension of the transmission rope 7. The nut remains in contact with the fixing plate to maintain the stability of the adjusted position.

[0035] The automatic scraping machine for refining tea leaves uses a geared motor 10 to drive a transmission rope 7, which in turn drives a scraper 9 to reciprocate above the sieve surface, scraping the tea leaves. During the scraping process, a pressure spring 21 keeps the scraper 9 in flexible contact with the sieve surface, ensuring scraping force while preventing hard damage. Furthermore, a lifting rope assembly provides multi-point support for the transmission rope 7, preventing sagging and shaking, and ensuring smooth operation of the slide block 8. When the transmission rope 7 becomes slack, its tension can be adjusted using a winding assembly and a fine-tuning assembly 41. In summary, this invention, through its rational mechanical structure design, achieves efficient scraping of refined tea leaves, offering advantages such as high scraping efficiency, stable operation, convenient adjustment and maintenance, and low manufacturing cost. It is applicable to various tea refining production lines, highly practical, and has good market application prospects.

[0036] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. An automatic scraping sieve machine for refining tea leaves, characterized in that, include: The support frame is composed of multiple support units connected together; adjacent support units are connected by connecting rods. The guide rod is fixed to the top crossbar of each support unit by a locking device, and a guide groove is provided at its bottom; the two ends of the guide rod are respectively provided with pulley one and pulley two, and pulley one and pulley two are connected by a transmission rope. A slide block is located below the guide rod and slides in a guide groove; one end of the slide block is fixedly connected to the transmission rope, and the other end slides in a guide groove with the other side of the transmission rope. The scraper is fixed to the bottom of the slide block; A geared motor is fixed to one side of the support frame and is used to drive the second pulley to rotate; The winding assembly, fixed on the support frame, is used to adjust the tension of the transmission rope.

2. The automatic scraping sieve machine for refining tea leaves according to claim 1, characterized in that, The locking component is L-shaped, with its bottom horizontal plate welded to the guide rod; the top of the locking component is fixed to the horizontal bar of the support unit by bolts.

3. The automatic scraping sieve machine for refining tea leaves according to claim 1, characterized in that, The slide includes a sliding plate and rollers; the sliding plate is located outside the guide groove, and a mounting plate is provided on its top; the mounting plate enters the guide groove; the rollers are located inside the guide groove and are rotatably connected to both sides of the mounting plate; both sides of the sliding plate are bent downward to form a hook-shaped part, and the transmission rope passes through the middle of the hook-shaped part; a clamping sleeve is provided inside the hook-shaped part on one side, and both ends of the clamping sleeve extend out of the hook-shaped part and are provided with locking nuts that are threadedly engaged with it.

4. The automatic scraping sieve machine for refining tea leaves according to claim 1, characterized in that, Two positioning frames are symmetrically arranged above the scraper, and a connecting plate is provided between the two positioning frames; a guide post is provided inside the positioning frame; the middle of the upper surface of the connecting plate is connected to the bottom of the slide block through a connecting post, and its two ends respectively enter the corresponding positioning frames and slide and guide each other with the corresponding guide post; a compression spring is sleeved on the guide post, the bottom of the compression spring abuts against the upper surface of the scraper and the top abuts against the lower surface of the connecting plate.

5. The automatic scraping sieve machine for refining tea leaves according to claim 1, characterized in that, A first pulley is provided on the output shaft of the geared motor, and a second pulley is provided above the rotating shaft of the second pulley; the first pulley and the second pulley are connected by a belt.

6. The automatic scraping sieve machine for refining tea leaves according to claim 1, characterized in that, The winding assembly includes a support plate, a pad, a first winding reel, a second winding reel, a third pulley, and a steering box. The support plate and the pad are fixed on the same support unit. The first winding reel and the second winding reel are stacked vertically, with a partition in the middle. A rotating rod passes through the partition, and both ends of the rotating rod are rotatably connected to the support plate and the pad, respectively. The rotating rod is interference-fitted with the middle of the first winding reel and the second winding reel. The third pulley is located on one side of the partition. The steering box is located on the support plate. One end of the transmission rope enters the steering box, turns, and extends out. Then, it passes through the first winding reel, the third pulley, and the second winding reel in sequence, enters the steering box again, turns, extends out, and connects to the second pulley.

7. The automatic scraping sieve machine for refining tea leaves according to claim 6, characterized in that, A cylindrical handle is provided on one side of the partition. When the handle is turned, the first winding reel and the second winding reel will simultaneously wind or unwind the rope. An L-shaped limiting plate is provided on the support foot of the support unit. One end of the limiting plate has a limiting hole for the handle to pass through, and the other end slides and guides with a limiting groove on the support foot.

8. The automatic scraping sieve machine for refining tea leaves according to claim 3, characterized in that, Multiple rope-lifting assemblies are spaced apart on the guide rod. Each rope-lifting assembly includes a positioning plate and an n-shaped rope-lifting frame. The positioning plate is fixed to the guide rod by bolts, and a second guide post is set above it. A second compression spring is sleeved on the outside of the second guide post, and an internal thread is opened in the middle of the spring. The top of the rope-lifting frame has a clearance groove that slides and guides the second guide post. A limiting bolt that threads with the second guide post is set above the clearance groove. The lower sides of the rope-lifting frame are bent inward to form a second hook-shaped part, and the inner contour of the second hook-shaped part is larger than the outer contour of the first hook-shaped part.

9. The automatic scraping sieve machine for refining tea leaves according to claim 8, characterized in that, The hook-shaped part 2 has a support part inside, and the two ends of the support part are set as inclined surfaces or arc surfaces.

10. The automatic scraping sieve machine for refining tea leaves according to claim 1, characterized in that, The support unit is equipped with a fine-tuning component, including two L-shaped guide plates and a guide block; the guide block is positioned between the two guide plates, with its central portion penetrated by the rotating shaft of the second pulley; a threaded rod is provided on the side of the guide block; an L-shaped fixing plate is fixed between the two guide plates by bolts, and the fixing plate has an clearance hole for the threaded rod to pass through; a nut is provided on the threaded rod and is threadedly engaged with it, and the nut is located on the side of the fixing plate away from the guide block.

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