A turnover type tea fresh leaf screening machine capable of preventing leaf blocking

Abstract

This invention discloses a flip-type fresh tea leaf sieving machine with anti-jamming properties, belonging to the field of tea sorting. It comprises a flipping cylinder, cylindrical screen rods, a rotating lever, and a drive mechanism. Each cylindrical screen rod has a movable shaft at its end. One end of the rotating lever abuts against one movable shaft near the center of the mounting ring, and the other end abuts against the other movable shaft away from the center. The drive mechanism rotates the rotating lever, causing one of the two movable shafts to move towards the center of the mounting ring, and the other towards the side away from the center. The two pairs of cylindrical screen rods move alternately along the radial direction within the flipping cylinder, following the movable shafts. In this invention, the relative movement of the cylindrical screen rods causes tea leaves meeting size requirements on adjacent cylindrical screen rods to pass through the sieve, and tea leaves not meeting size requirements to return to the cylindrical screen rods, thus improving the sieving efficiency of the fresh tea leaves.

Description

Technical Field

[0001] This invention relates to the field of tea leaf sorting technology, specifically to a flip-type tea leaf sieving machine that prevents leaf jamming. Background Technology

[0002] Freshly picked tea leaves vary in shape and size, and the moisture content differs depending on the size and tenderness of the leaves. Different industrial parameters are required for processing fresh leaves with different moisture content and sizes to produce tea that meets quality standards. Therefore, tea leaves need to be sorted before processing. Based on physical parameters such as size, shape, color, and specific gravity, the freshly picked leaves are graded and classified to obtain multiple grades of fresh leaf raw materials with similar size and consistent tenderness, so that the leaves of different sizes can be further processed in batches.

[0003] To achieve the grading and screening of fresh tea leaves, the existing technology of utility model patent with publication number CN217474036 provides a tea sorting machine to improve the quality of tea leaves. It is equipped with a primary sieve barrel, a secondary sieve barrel, and a tertiary sieve barrel, with the sieve holes gradually getting smaller as they move outward, thus sorting out the tea leaves from the inside out layer by layer with the progressively smaller sieve holes.

[0004] In existing technology, tea leaves are sieved by setting sieve holes on a sieve barrel. During the rotation of the sieve barrel, if the size of the tea leaves is larger than the width of the sieve holes, the tea leaves will get stuck in the sieve holes or piles of tea leaves will block the sieve holes. The sieve holes blocked by large-sized tea leaves or piles of tea leaves can hardly sieve small-sized tea leaves, and the tea leaves stuck in the sieve holes are difficult to remove, resulting in poor sieving effect. Summary of the Invention

[0005] To address this issue, the present invention provides a flip-type tea leaf sieving machine that prevents leaf jamming, effectively solving the technical problems in the prior art where large-sized tea leaves or piles of tea leaves easily get stuck in the sieve holes, preventing small-sized tea leaves from passing through the sieve, and the tea leaves stuck in the sieve holes are difficult to remove, resulting in poor sieving effect.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: a flip-type fresh tea leaf sieving machine that prevents leaf jamming, comprising:

[0007] A rotating cylinder is provided with an installation ring seat inside. The installation ring seat has several sliding grooves along the radial direction. Two rotating cylinders are provided and are coaxially arranged. One rotating cylinder has an inlet at the bottom and the other rotating cylinder is connected to a rotary drive structure at its outer end.

[0008] Cylindrical screen rods are installed between the rotating cylinders, and a screen gap is formed between adjacent cylindrical screen rods. The cylindrical screen rods are arranged along the circumference of the rotating cylinders, and each of them is provided with a movable shaft at its end. The movable shaft is slidably disposed in the groove.

[0009] A rotary lever is rotatably mounted on the mounting ring seat and positioned between every two of the movable shafts. One end of the rotary lever abuts against the side of one of the movable shafts near the center of the mounting ring seat, and the other end abuts against the side of the other movable shaft away from the center of the mounting ring seat.

[0010] A drive lever is installed on the side of the rotary lever. The drive lever can drive the rotary lever to rotate so that one of the two movable shafts moves toward the center of the mounting ring seat, and the other movable shaft moves away from the center of the mounting ring seat.

[0011] The two cylindrical screen rods move alternately along the radial direction within the rotating cylinder, following the movable shaft.

[0012] Furthermore,

[0013] The size of the sieve gap between adjacent cylindrical sieve bars changes continuously as the cylindrical sieve bars move in an alternating manner;

[0014] The maximum value of the sieve gap size between adjacent cylindrical sieve bars shall not exceed the maximum value of the size of the fresh tea leaves to be screened.

[0015] Furthermore,

[0016] The included angles between adjacent slides are all the same;

[0017] A connecting spring is installed at both ends inside the slide groove. One end of the connecting spring is connected to the inner wall of the slide groove, and the other end is connected to the side wall of the movable shaft.

[0018] The cylindrical screen rod is coaxially arranged and movably connected to the movable shaft, and the cylindrical screen rod can rotate around the movable shaft.

[0019] Furthermore,

[0020] The drive mechanism includes a rotating shaft and a transmission gear mounted on the rotating shaft;

[0021] The mounting ring seat has a circular hole, the rotating shaft is rotatably mounted on the mounting ring seat through the circular hole, and the rotary lever is connected to the rotating shaft;

[0022] A gear ring meshes with the outer side of the transmission gear, and a drive gear meshes with the inner side of the gear ring. The drive gear is located away from the transmission gear, and a drive motor is connected to the drive gear.

[0023] Furthermore,

[0024] One of the tilting cylinders has an opening with a ring plate, and the other tilting cylinder has an opening with a closing plate. A drive shaft is installed on the outside of the closing plate, and the drive motor is installed inside the ring plate and the closing plate.

[0025] Furthermore,

[0026] The rotary drive structure includes an electric motor and a motor disk mounted at the end of the electric motor;

[0027] The motor disk and the drive shaft are connected by a belt drive.

[0028] Furthermore,

[0029] The cylindrical screen rod has several annular grooves evenly spaced along the circumference, and an inner ball groove is formed in the annular groove. A rolling ring is installed on the annular groove, and an outer ball groove is formed on the inner wall of the rolling ring.

[0030] A plurality of steel balls are disposed between the rolling ring and the ring groove, and the steel balls are rolled within the outer ball groove and the inner ball groove.

[0031] In this design, a single rod segment is formed on the cylindrical screen rod away from the annular groove area, and the position of the rolling ring on the adjacent cylindrical screen rod corresponds one-to-one with the position of the single rod segment.

[0032] Furthermore,

[0033] A friction column is retractably installed at the leaf inlet along the length of the cylindrical screen rod.

[0034] At least part of the outer wall of the cylindrical screen rod is attached to the outer wall of the friction column;

[0035] The contact position between the cylindrical screen rod and the friction column is far away from the annular groove area.

[0036] Furthermore,

[0037] Each of the tilting cylinders is equipped with a cylinder base at its bottom, and the tilting cylinder can rotate on the cylinder base;

[0038] An outer frame is provided outside the tilting cylinder, and the bottom of the outer frame is open downwards.

[0039] Furthermore,

[0040] A feeding auxiliary cylinder is installed inside the rotating cylinder near the leaf inlet, and the inner diameter of the feeding auxiliary cylinder gradually increases along the feeding direction of the fresh tea leaves.

[0041] Compared with the prior art, the present invention has the following advantages:

[0042] In this invention, a cylindrical sieve rod is installed inside a rotating cylinder. A movable shaft is located at the end of each cylindrical sieve rod, and a rotary lever is positioned between every two movable shafts. Driven by a driving mechanism, the rotary lever rotates, causing one of the two movable shafts to move towards the center, while the other moves away from the center. This causes the cylindrical sieve rod to move in an alternating manner along the radial direction. Tea leaves can pass through the sieve gaps between the cylindrical sieve rods. During this continuous alternation, adjacent cylindrical sieve rods maintain relative motion. This relative motion causes tea leaves that meet the size requirements on adjacent cylindrical sieve rods to pass through, and tea leaves that do not meet the size requirements to return to the cylindrical sieve rods. The movable structure forming the sieve gaps prevents large tea leaves from blocking the gaps, improving the sieve efficiency of the tea leaves. Attached Figure Description

[0043] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0044] Figure 1 A three-dimensional cross-sectional view of a flip-type tea leaf sieving machine for preventing leaf jamming is provided in an embodiment of the present invention.

[0045] Figure 2 This is a schematic diagram of the structure of a flip-type fresh tea leaf sieving machine that prevents leaf jamming, provided in an embodiment of the present invention;

[0046] Figure 3 This is a structural schematic diagram from another perspective of a flip-type fresh tea leaf sieving machine for preventing leaf jamming, provided in an embodiment of the present invention.

[0047] Figure 4 A top view of a flip-type tea leaf sieving machine for preventing leaf jamming, provided in an embodiment of the present invention;

[0048] Figure 5 for Figure 4 A three-dimensional cross-sectional view of the tilting cylinder in the AA direction;

[0049] Figure 6 for Figure 5 Enlarged structural diagram of the middle section;

[0050] Figure 7 for Figure 5 A magnified structural diagram of A in the middle;

[0051] Figure 8 for Figure 4A three-dimensional cross-sectional view of the mounting ring seat in the AA direction;

[0052] Figure 9 This is a top view of the initial structure of three cylindrical screen rods;

[0053] Figure 10 for Figure 9 A schematic diagram of the structure in the initial state of the cross section along the BB direction;

[0054] Figure 11 for Figure 10 A schematic diagram of the structure of the cylindrical screen rod after its staggered motion.

[0055] Figure 12 for Figure 9 Schematic diagram of the structure in the initial state of the cross section in the C-direction;

[0056] Figure 13 for Figure 12 A schematic diagram of the structure of the cylindrical screen rod after its staggered motion.

[0057] Figure 14 This is a schematic diagram of the friction column in an embodiment of the present invention.

[0058] The labels in the diagram represent the following:

[0059] 1-Tilting cylinder; 2-Cylindrical screen rod; 3-Rotary lever; 4-Drive lever; 5-Mounting ring seat; 6-Groove; 7-Inlet; 8-Rotary drive structure; 9-Screen slot; 10-Moving shaft; 12-Ring plate; 13-Closing plate; 14-Drive shaft; 15-Ring groove; 16-Inner ball groove; 17-Rolling ring; 18-Outer ball groove; 19-Steel ball; 21-Friction column; 24-Cylinder seat; 25-Outer frame; 26-Discharge auxiliary cylinder;

[0060] 31 - Single pole segment;

[0061] 41-Rotating shaft; 42-Transmission gear; 43-Round hole; 44-Gear ring; 45-Drive gear;

[0062] 82-Motor disc; 83-Belt. Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] like Figure 1 , Figure 2, Figure 3 and Figure 4 , Figure 5 , Figure 6 As shown, the present invention provides a flip-type tea leaf sieving machine to prevent leaf jamming, which has a structure including a flipping cylinder 1, a cylindrical sieve rod 2, a rotating lever 3, and a driving lever 4.

[0065] An installation ring seat 5 is fixedly installed inside the tilting cylinder 1. The tilting cylinder 1 can rotate. Several sliding grooves 6 are opened along the radial direction on the installation ring seat 5. Two tilting cylinders 1 are set and are arranged coaxially. One tilting cylinder 1 has an inlet 7 at the bottom and the outer end of the other tilting cylinder is connected to a rotary drive structure 8.

[0066] There is a certain gap between the two rotating cylinders 1. The area between the two rotating cylinders 1 can be used for sieving and feeding fresh tea leaves. The rotary drive structure 8 is used to drive the rotating cylinders 1 to rotate so as to achieve the rotation of fresh tea leaves.

[0067] A cylindrical sieve rod 2 is also provided inside the rotating cylinder 1. The cylindrical sieve rod 2 is installed between the rotating cylinders 1, and a sieve gap 9 is formed between adjacent cylindrical sieve rods 2. The sieve gap 9 is used to restrict the passage of fresh tea leaves of a specific size.

[0068] Since the tilting drum 1 is rotating during the screening process, the cylindrical screen rods 2 are arranged along the circumference of the tilting drum 1, and each of them is provided with a movable shaft 10 at its end. The movable shaft 10 is slidably disposed in the chute 6.

[0069] The rotary lever 3 is rotatably mounted on the mounting ring seat 5 and positioned between every two movable shafts 10. One end of the rotary lever 3 abuts against the side of one movable shaft 10 near the center of the mounting ring seat 5, and the other end abuts against the side of the other movable shaft 10 away from the center of the mounting ring seat 5.

[0070] The drive lever 4 is installed on the side of the rotary lever 3. The drive lever 4 can drive the rotary lever 3 to rotate so that one of the two movable shafts 10 moves toward the center of the mounting ring seat 5, and the other movable shaft 10 moves away from the center of the mounting ring seat 5.

[0071] In this invention, a cylindrical sieve rod 2 is installed inside the rotating cylinder 1. A movable shaft 10 is provided at the end of the cylindrical sieve rod 2. A rotary lever 3 is provided between every two movable shafts 10. The rotary lever 3 can rotate under the drive of the driving lever 4, causing one of the two movable shafts 10 to move towards the center and the other to move away from the center, thus causing the cylindrical sieve rod 2 to move in an alternating manner along the radial direction. Tea leaves can pass through the sieve gaps between the cylindrical sieve rods 2. During the continuous alternation process, adjacent cylindrical sieve rods 2 always move relative to each other. This relative movement causes tea leaves that meet the size requirements on adjacent cylindrical sieve rods 2 to pass through the sieve, and tea leaves that do not meet the size requirements can be returned to the cylindrical sieve rod 2. The movable structure forming the sieve gaps can prevent large-sized tea leaves from blocking the sieve gaps, improving the sieve effect of the tea leaves.

[0072] In this invention, a base 24 is installed at the bottom of each rotating cylinder 1. The base 24 supports the rotating cylinder 1, and the rotating cylinder 1 can rotate on the base 24.

[0073] In addition, an outer frame 25 is provided outside the rotating drum 1. The bottom of the outer frame 25 is open downwards, and a feeding port can be provided at the bottom of the outer frame 25 to collect the sieved tea leaves.

[0074] In this invention, the size of the sieve gap 9 between adjacent cylindrical sieve rods 2 continuously changes as the cylindrical sieve rods 2 move in an alternating manner. In order to prevent the sieve gap 9 from becoming too large during the alternating movement, which would cause large-sized fresh tea leaves to be screened out, the maximum size of the sieve gap 9 between adjacent cylindrical sieve rods 2 needs to be no greater than the maximum size of the fresh tea leaves to be screened. Generally, the maximum size of the sieve gap 9 between adjacent cylindrical sieve rods 2 is equal to the maximum size of the fresh tea leaves to be screened.

[0075] To ensure that the change range of the cylindrical screen rod 2 is consistent during the staggered movement, the included angle between adjacent slides 6 must be the same, that is, the spacing between slides 6 must be consistent.

[0076] In addition, in order to enable the cylindrical screen rod 2 to automatically reset when it is not under force, the present invention also makes the following design: connecting springs are installed at both ends of the inside of the slide groove 6, one end of the connecting spring is connected to the inner wall of the slide groove 6, and the other end is connected to the side wall of the movable shaft 10.

[0077] In the above embodiment, two connecting springs are installed in a corresponding groove 6. Under the action of the connecting springs, the movable shaft 10 on the cylindrical screen rod 2 is located near the middle position in the groove 6. In addition, the cylindrical screen rod 2 is made of a lightweight material and has a small overall weight. Therefore, its end movable shaft 10 can be kept in a specific position in the groove 6 under the action of the connecting springs.

[0078] In this invention, the cylindrical sieve rod 2 can not only rotate around the central axis of the rotating cylinder 1, but also rotate on its own axis. Therefore, the cylindrical sieve rod 2 is coaxially arranged and movably connected with the movable shaft 10. The cylindrical sieve rod 2 can rotate around the movable shaft 10. During the rotation of the cylindrical sieve rod 2 around the central axis of the rotating cylinder 1, it is accompanied by a rotational motion. The rotational motion can cause the tea leaves that meet the size conditions to pass through the sieve, and can also cause the tea leaves that do not meet the size conditions to return to the interior of the cylindrical sieve rod 2.

[0079] In this invention, the driving element 4 can drive the rotary lever 3 to rotate, so that one of the two movable shafts 10 moves towards the center of the mounting ring seat 5, and the other movable shaft 10 moves away from the center of the mounting ring seat 5. The driving element 4 mainly adopts the following preferred embodiments, such as... Figure 8 As shown, the drive mechanism 4 includes a rotating shaft 41 and a transmission gear 42 mounted on the rotating shaft 41;

[0080] The mounting ring seat 5 has a circular hole 43. The rotating shaft 41 is rotatably mounted on the mounting ring seat 5 through the circular hole 43. The rotating lever 3 is connected to the rotating shaft 41. The transmission gear 42 is meshed with a gear ring 44 on the outside. The gear ring 44 is meshed with a drive gear 45 on the inside. The drive gear 45 is located away from the transmission gear 42. The drive gear 45 is connected to a drive motor.

[0081] Driven by the drive motor, the drive gear 45 rotates, which in turn drives the gear ring 44 to rotate. During the rotation of the gear ring 44, each transmission gear 42 rotates, thereby causing each rotating shaft 42 to rotate in the same direction by the same angle. Through the rotary lever 3, one of the two movable shafts 10 moves toward the center of the mounting ring seat 5, and the other movable shaft 10 moves away from the center of the mounting ring seat 5. This causes one of the two cylindrical screen rods 2 to move inward along the radial direction, and the other cylindrical screen rod 2 to move outward along the radial direction.

[0082] Assuming the cylindrical screen rods 2 are sequentially set as the 1st, 2nd, 3rd, 4th, ... cylindrical screen rods 2 along the circumference, then the odd-numbered cylindrical screen rods 2, such as the 1st, 3rd, ... cylindrical screen rods 2, move in the same direction along the radius, and the even-numbered cylindrical screen rods 2, such as the 2nd, 4th, ... cylindrical screen rods 2, move in the same direction along the radius.

[0083] To achieve the flipping of the flipping cylinder 1, the present invention also makes the following design: one flipping cylinder 1 has an opening with a ring plate 12, and an inlet 7 is formed at the center of the ring plate 12; the other flipping cylinder 1 has an opening with a closing plate 13, and a drive shaft 14 is installed on the outside of the closing plate 13; and a drive motor is installed on the inside of the ring plate 12 and the closing plate 13.

[0084] The rotary drive structure 8 is connected to one of the tilting cylinders 1 to drive the tilting cylinder 1 to tilt. The structure of the rotary drive structure 8 is as follows: Figure 3 As shown, the rotary drive structure 8 includes an electric motor and a motor disk 82 mounted at the end of the electric motor. The motor disk 82 and the drive shaft 14 are connected by a belt 83.

[0085] The electric motor can drive the motor disk 82 to rotate, and the motor disk 82 can drive the transmission shaft 14 to rotate via the belt 83, thereby driving the rotating drum 1 located at the tail to rotate. Thus, the rotating drum 1 at the front can also rotate synchronously via the cylindrical screen rod 2.

[0086] To prevent obstruction during the sieving process of fresh tea leaves, the present invention also makes the following design to the cylindrical sieve rod 2, such as... Figure 5 and Figure 7 As shown, a number of annular grooves 15 are evenly spaced along the circumference of the cylindrical screen rod 2. An inner ball groove 16 is provided in the annular groove 15. A rolling ring 17 is installed on the annular groove 15. An outer ball groove 18 is provided on the inner wall of the rolling ring 17. A number of steel balls 19 are arranged between the rolling ring 17 and the annular groove 15. The steel balls 19 are rolled in the outer ball groove 18 and the inner ball groove 16.

[0087] In the above embodiments, the rolling ring 17 can be used as part of the cylindrical sieve rod 2. The rolling ring 17 can cooperate with the adjacent cylindrical sieve rod 2 to process the fresh tea leaves during the rotation of the cylindrical sieve rod 2.

[0088] In this section, a single rod segment 31 is formed on the cylindrical screen rod 2 in the area away from the annular groove 15, and the position of the rolling ring 17 on the adjacent cylindrical screen rod 2 corresponds one-to-one with the position of the single rod segment 31.

[0089] In the above embodiment, it is assumed that tea leaves are stuck at the corresponding positions of the single rod segment 31 and the rolling ring 17. During the process of the single rod segment 31 moving inward along the radial direction, the static friction of the tea leaves causes the single rod segment 31 to drive the rolling ring 17 to rotate inward through the tea leaves. In this process, the tea leaves are driven away from the sieve gap 9.

[0090] In this invention, to further facilitate the sieving of fresh tea leaves, the following design is also included: Figure 14 As shown, a friction column 21 is telescopically installed at the leaf inlet 7 along the length of the cylindrical screen rod 2;

[0091] At least part of the outer wall of the cylindrical screen rod 2 is attached to the outer wall of the friction column 21;

[0092] The contact position between the cylindrical screen rod 2 and the friction column 21 is far away from the area of ​​the annular groove 15.

[0093] The friction column 21 can be extended and retracted through a motorized structure, such as a drive cylinder, and when the friction column 21 is not placed inside the leaf inlet 7, it is far away from the leaf inlet 7 to avoid obstructing the feeding process of tea leaves at the leaf inlet 7.

[0094] In the initial state, the distances from adjacent cylindrical screen rods 2 to the central axis of the tilting cylinder 1 are the same. At this time, the cylindrical screen rods 2 do not contact the friction column 21.

[0095] During the alternating motion of the cylindrical screen rods 2, some of the cylindrical screen rods 2 move inward and come into contact with the friction column 21. Taking the cylindrical screen rods 2 rotating counterclockwise with the rotating cylinder 1 as an example, the cylindrical screen rods 2 that move inward also rotate counterclockwise under the static friction force of the friction column 21 during the rotation around the central axis of the rotating cylinder 1. In other words, during the rotation of the cylindrical screen rods 2 around the central axis of the rotating cylinder 1, some of the cylindrical screen rods 2 rotate counterclockwise around themselves. Among the adjacent cylindrical screen rods 2, the rotation of one of the cylindrical screen rods 2 promotes the feeding of fresh tea leaves.

[0096] In this invention, there is a situation where fresh tea leaves are stuck in a pile between the sieve gaps 9. Taking counterclockwise rotation as an example, the specific movement state of the fresh tea leaves between the sieve gaps 9 is analyzed.

[0097] Since the cylindrical sieve rod 2 rotates around the central axis of the tilting cylinder 1 mainly to flip the fresh tea leaves inside, the following analysis focuses on the movement of the rolling ring 17 between adjacent cylindrical sieve rods 2 to analyze the movement state of the tea leaves that are stuck between them. Some of the stuck tea leaves will not be affected by the rotation of the cylindrical sieve rod 2 around the central axis of the tilting cylinder 1, so the position of the cylindrical sieve rod 2 on the circumference is considered constant, and the state of the stuck tea leaves is analyzed:

[0098] In the initial state, the distances from adjacent cylindrical screen rods 2 to the central axis of the tilting cylinder 1 are the same;

[0099] Assuming the fresh tea leaves are positioned between the two cylindrical sieve bars 2, such as Figure 9 As shown (the shaded area in the figure represents the rolling ring), the cross-section of the screen slot 9 at different positions where it is engaged with the cylindrical screen rod 2 is examined:

[0100] like Figure 10 As shown, if the fresh tea leaves are piled and clamped at this cross-sectional position, during the process of the cylindrical sieve rods 2 on both sides moving inward along the radial direction and the cylindrical sieve rod 2 in the middle moving outward along the radial direction, the cylindrical sieve rods 2 moving inward gradually come into contact with the friction column 21, and during the process of rotating counterclockwise around the central axis of the rotating cylinder 1, they rotate counterclockwise under the action of the static friction force of the friction column 21 (making the cylindrical sieve rod 2 appear to be rolling on the surface of the friction column 21).

[0101] The single rod segments 31 on the leftmost and rightmost cylindrical screen rods 2 rotate counterclockwise along with the cylindrical screen rod 2, such as... Figure 11 As shown, during the counterclockwise rotation of the single rod section 31 of the cylindrical sieve rod 2 on the left, the tea leaves piled on the outer circumference of the rolling ring 17 gradually move into the inner side of the rolling ring 17, closer to the center of the rotating cylinder 1, and gradually move away from the area of ​​the sieve gap 9. During this process, the middle rolling ring 17 also rotates clockwise, thus bringing this part of the fresh tea leaves back into the cylindrical sieve rod 2.

[0102] If there is a pile of tea leaves between the rightmost and middle cylindrical screen rods 2, the tea leaves will be driven by the counterclockwise static friction force of the single rod segment 31 on the right. However, due to the limitation of the size of the screen gap 9, the tea leaves cannot be fed. Therefore, in actual application, the rotation direction of the tilting cylinder 1 should be adjusted periodically. After adjusting the rotation direction, the single rod segment 31 on the right will rotate clockwise. Under the action of static friction, the single rod segment 31 on the right will drive the tea leaves pile in the screen gap 9 to gradually leave the screen gap 9 and move to the inside of the rolling ring 17. Thus, periodically adjusting the rotation direction of the tilting cylinder 1 can make the tea leaves piles in different positions return to the cylindrical screen rod 2.

[0103] like Figure 12 and Figure 13 As shown, if the fresh tea leaves are stuck at the position of the cross section, during the process of the single rod segment 31 moving inward with the cylindrical sieve rod 2, and the single rod segment 31 must rotate clockwise, the entire rotating cylinder 1 needs to be rotating clockwise, which can drive the tea leaves piled on the outer circumference of the rolling ring 17 to gradually move in a counterclockwise circular motion to the inner side of the rolling ring 17 near the center of the rotating cylinder 1, and gradually move away from the area of ​​the sieve gap 9.

[0104] In summary, regardless of where the fresh tea leaves are stuck in the sieve gap 9, as long as the single rod segment 31 moves inward along the radial direction and the rolling ring 17 moves outward along the radial direction, and the single rod segment 31 rotates towards the side of the sieve gap 9 away from the stuck tea leaves, the tea leaves in the sieve gap 9 can be moved towards the inner side of the cylindrical sieve rod 2 and detached from the sieve gap 9. Therefore, in practical applications, the rotation direction of the rotating cylinder 1 needs to be continuously adjusted to help the tea leaves formed at various positions in the sieve gap 9 detach from the sieve gap 9 and avoid blocking other fresh tea leaves from passing through the sieve.

[0105] To prevent tea leaves from falling into the rotating drum 1 after being sieved in the cylindrical sieve rod 2 and thus unable to be discharged, the present invention also includes the following design: a discharge auxiliary cylinder 26 is installed in the rotating drum 1 near the leaf inlet 7, and the inner diameter of the discharge auxiliary cylinder 26 gradually increases along the feeding direction of the fresh tea leaves.

[0106] The bottom of the feeding auxiliary cylinder 26 forms a downward inclined slope, which facilitates the feeding of the sieved fresh tea leaves.

[0107] In this invention, the rotation amplitude of the gear ring 44 in a single operation determines the rotation angle of the rotary lever 3, thereby determining the maximum amplitude of the interlacing of the cylindrical screen rods 2 each time. In other words, the maximum value of the screen gap 9 between the cylindrical screen rods 2 is limited by the rotation amplitude of the gear ring 33. Therefore, the screening level of each screening process can be controlled by adjusting the rotation amplitude of the gear ring 33.

[0108] For example, when fresh tea leaves are placed into the cylindrical sieve rod 2, the maximum value of the sieve gap 9 is adjusted to 'a' for the first time. This will filter out fresh tea leaves with a size between 0 and 'a'. The fresh tea leaves remaining in the cylindrical sieve rod 2 will all be larger than 'a'. Then, the sieve gap is adjusted a second time, with the maximum value adjusted to 'b' (b is greater than 'a'). This will filter out fresh tea leaves with a size between 'a' and 'b' through the sieve gap 9. This process can be repeated. In practical applications, the size of the fresh tea leaves in each sieve process can be controlled by adjusting the rotation amplitude of the gear ring 33. During the final sieve process, the maximum value of the sieve gap 9 is adjusted to the maximum to completely discharge the last batch of fresh tea leaves, thereby achieving the sieve separation of different grades of fresh tea leaves.

[0109] A corresponding collection box is set at the bottom of the cylindrical screen rod 2 to collect the tea leaves fed in different screening processes. To improve the collection efficiency, a conveyor belt structure that can drive the collection box to move back and forth can also be set at the bottom.

[0110] To improve the sieving efficiency of this device, a vibrating leaf inlet plate can be installed at the leaf inlet. The leaf inlet plate can move horizontally into the rotating cylinder 1. During the process of feeding tea leaves, the leaf inlet plate gradually moves into the rotating cylinder 1. The vibration effect during the movement makes the tea leaves evenly distributed in batches within the cylindrical screen rod 2, thereby improving the sieving efficiency of the tea leaves.

[0111] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A flip-type fresh tea leaf sieving machine with anti-leaf-jamming function, characterized in that, have: A rotating cylinder (1) is installed inside, and a mounting ring seat (5) is provided on the mounting ring seat (5) along the radial direction. The rotating cylinder (1) is configured as two cylinders and is coaxially arranged. One of the rotating cylinders (1) has an inlet (7) at the bottom, and the other rotating cylinder is connected to a rotary drive structure (8) at its outer end. Cylindrical screen rods (2) are installed between the rotating cylinders (1), and screen gaps (9) are formed between adjacent cylindrical screen rods (2). The cylindrical screen rods (2) are arranged along the circumferential direction of the rotating cylinders (1), and each of them is provided with a movable shaft (10). The movable shaft (10) is slidably disposed in the groove (6). A rotary lever (3) is rotatably mounted on the mounting ring seat (5) and located between every two of the movable shafts (10). One end of the rotary lever (3) abuts against the side of one of the movable shafts (10) near the center of the mounting ring seat (5), and the other end abuts against the side of the other movable shaft (10) away from the center of the mounting ring seat (5). A drive lever (4) is installed on the side of the rotary lever (3). The drive lever (4) can drive the rotary lever (3) to rotate so that one of the two movable shafts (10) moves toward the center of the mounting ring seat (5), and the other movable shaft (10) moves away from the center of the mounting ring seat (5). Among them, the two cylindrical screen rods (2) follow the movable shaft (10) and move alternately in the radial direction inside the flipping cylinder (1).

2. The anti-leaf-jamming flip-type fresh tea leaf sieving machine according to claim 1, characterized in that, The size of the sieve gap (9) between adjacent cylindrical sieve rods (2) changes continuously as the cylindrical sieve rods (2) move in an alternating manner; The maximum value of the sieve gap (9) between adjacent cylindrical sieve bars (2) does not exceed the maximum value of the size of the fresh tea leaves to be screened.

3. The anti-leaf-jamming flip-type fresh tea leaf sieving machine according to claim 1, characterized in that, The included angles between adjacent slides (6) are all the same; A connecting spring is installed at both ends of the slide groove (6). One end of the connecting spring is connected to the inner wall of the slide groove (6), and the other end is connected to the side wall of the movable shaft (10). The cylindrical screen rod (2) is coaxially arranged and movably connected with the movable shaft (10), and the cylindrical screen rod (2) can rotate around the movable shaft (10).

4. The anti-leaf-jamming flip-type fresh tea leaf sieving machine according to claim 3, characterized in that, The drive mechanism (4) includes a rotating shaft (41) and a transmission gear (42) mounted on the rotating shaft (41); The mounting ring seat (5) has a circular hole (43), the rotating shaft (41) is rotatably mounted on the mounting ring seat (5) through the circular hole (43), and the rotating lever (3) is connected to the rotating shaft (41); A gear ring (44) meshes with the outer side of the transmission gear (42), and a drive gear (45) meshes with the inner side of the gear ring (44). The drive gear (45) is located away from the transmission gear (42), and a drive motor is connected to the drive gear (45).

5. The anti-leaf-jamming flip-type fresh tea leaf sieving machine according to claim 4, characterized in that, One of the rotating cylinders (1) has an opening with a ring plate (12), and the other rotating cylinder (1) has an opening with a closing plate (13). A drive shaft (14) is installed on the outside of the closing plate (13), and the drive motor is installed inside the ring plate (12) and the closing plate (13).

6. The anti-leaf-jamming flip-type fresh tea leaf sieving machine according to claim 5, characterized in that, The rotary drive structure (8) includes an electric motor and a motor disk (82) mounted on the end of the electric motor; The motor disk (82) and the drive shaft (14) are connected by a belt (83).

7. The anti-leaf-jamming flip-type fresh tea leaf sieving machine according to claim 6, characterized in that, The cylindrical screen rod (2) has several annular grooves (15) evenly spaced along the circumference. The annular grooves (15) have inner ball grooves (16) inside. The annular grooves (15) are equipped with roller rings (17), and the inner wall of the roller rings (17) has outer ball grooves (18). A plurality of steel balls (19) are provided between the rolling ring (17) and the ring groove (15), and the steel balls (19) are rolled in the outer ball groove (18) and the inner ball groove (16); In this section, a single rod segment (31) is formed on the cylindrical screen rod (2) in the area away from the annular groove (15), and the position of the rolling ring (17) on the adjacent cylindrical screen rod (2) corresponds one-to-one with the position of the single rod segment (31).

8. The anti-leaf-jamming flip-type fresh tea leaf sieving machine according to claim 7, characterized in that, A friction column (21) is telescopically installed at the leaf inlet (7) along the length of the cylindrical screen rod (2); At least part of the outer wall of the cylindrical screen rod (2) is attached to the outer wall of the friction column (21); The contact position between the cylindrical screen rod (2) and the friction column (21) is far away from the area of ​​the annular groove (15).

9. The anti-leaf-jamming flip-type fresh tea leaf sieving machine according to claim 1, characterized in that, The bottom of each of the flipping cylinders (1) is equipped with a cylinder base (24), and the flipping cylinder (1) can rotate on the cylinder base (24); An outer frame (25) is provided outside the rotating cylinder (1), and the bottom of the outer frame (25) is open downwards.

10. The anti-leaf-jamming flip-type fresh tea leaf sieving machine according to claim 8, characterized in that, A feeding auxiliary cylinder (26) is installed inside the turning cylinder (1) near the leaf inlet (7), and the inner diameter of the feeding auxiliary cylinder (26) gradually increases along the feeding direction of the fresh tea leaves.

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