Tea multi-stage sorting device

Abstract

The invention discloses a tea multi-stage sorting device which comprises a feeding hopper, a feeding pipe, a feeding cylinder, a motor, a screen cylinder, a shell and a bottom frame, the screen cylinder is installed in an inner cavity of the shell, one end of the feeding pipe is connected with the bottom of the feeding hopper, the other end of the feeding pipe extends into the feeding cylinder, the feeding cylinder is in transmission connection with the motor through a transmission mechanism, and the motor is in transmission connection with the bottom frame. The screen drum consists of a plurality of sub screen drums; each sub-screen drum is composed of a plurality of arc-shaped screen plates, a rotatable pin roller is arranged at the top of each mounting base, the pin rollers are attached to the outer walls of the connecting rings of the corresponding sub-screen drums, and a plurality of evenly-distributed protruding blocks are arranged on the peripheries, making contact with the pin rollers, of the outer walls of the connecting rings; the connecting mechanism comprises a screw rod, a spring and a plurality of connecting holes, and the connecting holes are uniformly formed in the connecting ring; the problem that tea leaves at the bottom of the screen drum are more and more tightly clamped due to overall vibration of the screen drum in the prior art is solved, and meanwhile the defect that moisture in the tea leaves is easily reduced by adopting a fan structure is overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of tea sorting devices, and particularly relates to a multi-stage tea sorting device. Background Art

[0002] The quality of fresh tea leaves is the basis of tea quality. Only excellent fresh tea leaves can be processed into high-quality tea. The main methods of fresh tea leaf picking are manual picking and mechanical picking. Manual picking has strong recognition of tea leaves and can control the quality of fresh tea leaves, but the manual picking method has high labor intensity, low efficiency and high cost, and is generally used for the picking of famous and high-quality teas. The mechanical picking method has high efficiency and low cost, and has now been widely used by tea farmers. However, the mechanical picking has poor selectivity and recognition of fresh tea leaves. Therefore, after mechanical picking, the picked tea leaves need to be screened and graded, archived after screening, and the tea leaves with different leaf buds are processed specifically to produce high-quality bulk tea.

[0003] Existing fresh tea leaf sorting devices generally adopt a drum structure, and the drum is driven to rotate by a motor. When the fresh tea leaves roll in the drum, the purpose of separating the tea leaves can be achieved. The main disadvantages of this device are as follows: During the screening process of fresh tea leaves, they are easily stuck on the drum and block the screen, resulting in the fresh tea leaves not being screened out in time, thus reducing the screening efficiency. Existing solutions, such as the patent with the patent name "Tea Sorting Machine" and patent number "201510269691X", install a blower on one side of the filter cylinder to solve the problem of screen blockage. However, with the blower structure, it is easy to dry the moisture in the fresh tea leaves, resulting in the shrinkage of the fresh tea leaves and a smaller volume, so they are screened out in advance, resulting in poor uniformity of sorted tea leaves. At the same time, the blower structure is likely to bring dust in the air into the filter cylinder, affecting the cleanliness of the tea leaves. In view of the above situation, the present invention provides a solution. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-stage tea sorting device.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions:

[0006] A multi-stage sorting device for tea leaves, comprising a feed hopper, a feed pipe, a feed cylinder, a motor, a sieve cylinder, a housing and a chassis. The sieve cylinder is installed inside the housing cavity, the housing is installed on the chassis, the feed cylinder is connected to the feed end of the sieve cylinder, one end of the feed pipe is connected to the bottom of the feed hopper, and the other end of the feed pipe extends into the interior of the feed cylinder. The feed cylinder is in transmission connection with the motor through a transmission mechanism. The sieve cylinder is in the shape of a frustum of a cone, and the diameter of the feed end is smaller than that of the tail end. The sieve cylinder is composed of multiple sub-sieve cylinders, and the diameter of the sieve holes on the rear sub-sieve cylinder is set larger than that of the front sub-sieve cylinder. A conical blanking cavity is provided below each sub-sieve cylinder, and a material outlet is provided at the bottom of each blanking cavity. A tail material cavity is provided inside the housing at the tail end of the sieve cylinder, and a tail material outlet is provided at the bottom of the tail material cavity; each sub-sieve cylinder is composed of multiple arc-shaped sieve plates, and adjacent two arc-shaped sieve plates are connected by a side connecting belt made of flexible material. A throwing plate extending into the inner cavity of the sieve cylinder is provided on one side of each arc-shaped sieve plate. The ends of adjacent two sub-sieve cylinders are connected by an end connecting belt made of flexible material. Connecting rings are provided at both ends of each sub-sieve cylinder, and the sub-sieve cylinder is connected to the inner wall of the feed cylinder or the connecting ring through the connecting rings and a connecting mechanism. The feed cylinder and the connecting ring are both installed on the mounting seats at different positions inside the housing through bearings. A rotatable roller is provided at the top of each mounting seat, and the roller is in fit with the outer wall of the connecting ring of the corresponding sub-sieve cylinder. A number of evenly distributed convex blocks are provided on the outer wall of the connecting ring and on the circumference in contact with the roller; the connecting mechanism includes a screw, a spring and a connecting hole. A plurality of connecting holes are evenly provided on the connecting ring. The threaded end of the screw passes through the connecting hole and is in threaded cooperation with the threaded hole on the inner wall of the feed cylinder or the connecting ring. The spring is sleeved on the screw part between the nut and the connecting ring. The positions of the connecting holes on each connecting ring are arranged in one-to-one correspondence with the positions of the convex blocks. The inner walls of the feed cylinder and the connecting ring are both connected to a linkage shaft located at the middle position of the sieve cylinder through multiple connecting rods.

[0007] Further, the top of the convex block is arc-shaped, with a right-angled side and an inclined side on both sides respectively, forming a structure similar to a right-angled trapezoid, and the inclined side of the convex block is located on the front side of the rotation direction of the sieve cylinder compared with the right-angled side.

[0008] Further, the convex blocks at both ends of each arc-shaped sieve plate are arranged in a staggered manner.

[0009] Further, the transmission mechanism includes a gear ring, a gear and a reducer. The gear ring is located at the outer end of the feed cylinder and is integrally formed with the latter. The gear is in meshing transmission with the gear ring and is installed on the output shaft of the reducer. The motor is connected to the input shaft of the reducer.

[0010] Further, a maintenance port is provided at the outer end of the tail material cavity, and a maintenance cover plate is installed on the maintenance port.

[0011] Further, both the side connection belt and the end connection belt are made of gauze, and are sewn and connected by sewing threads passing through the sewing holes reserved on the sieve cylinder.

[0012] Further, the sieve cylinder is sequentially connected by three sub-sieve cylinders through connection rings.

[0013] Further, the number of arc-shaped sieve plates included in each sub-sieve cylinder is different.

[0014] Further, the inner cavity of the feeding end of the feeding cylinder is arranged in a conical structure with a gradually increasing diameter from the outside to the inside.

[0015] Further, the reducer is a gear reducer.

[0016] In summary, the present invention has the following beneficial effects:

[0017] 1. By designing a sub-sieve cylinder composed of multiple arc-shaped sieve plates, connecting multiple sub-sieve cylinders to form a sieve cylinder structure, and designing a vibration mechanism composed of convex blocks and rollers, the arc-shaped sieve plates rotated to the top generate vibrations, and the tea leaves fall back into the sieve cylinder under the action of vibration and gravity, thereby avoiding the blockage of the sieve holes.

[0018] 2. The present invention solves the problem in the prior art that the tea leaves at the bottom of the sieve cylinder are stuck tighter and tighter due to the overall vibration of the sieve cylinder, and at the same time solves the defect that the moisture in the tea leaves is easily reduced by using a fan structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the external structure of the present invention;

[0020] Figure 2 is a schematic diagram of the internal structure of the present invention;

[0021] Figure 3 is a schematic diagram of the structure of the feeding end of the present invention;

[0022] Figure 4 is Figure 3 a partial enlarged view of;

[0023] Figure 5 is a cross-sectional view of the connection part of the connection ring of the present invention;

[0024] Figure 6 is a schematic diagram of the sieve cylinder connection structure of the present invention;

[0025] In the figure, 1 is the feed hopper; 2 is the feed pipe; 3 is the feed cylinder; 4 is the gear ring; 5 is the gear; 6 is the reducer; 7 is the motor; 8 is the sieve cylinder; 9 is the housing; 10 is the blanking chamber; 11 is the chassis; 12 is the material outlet; 13 is the connecting ring; 14 is the side connecting belt; 15 is the mounting seat; 16 is the connecting ring; 17 is the bump; 18 is the roller; 19 is the tailing chamber; 20 is the maintenance cover plate; 21 is the tailing outlet; 22 is the linkage shaft; 23 is the connecting rod; 24 is the bearing; 25 is the screw; 26 is the spring; 27 is the throwing plate; 28 is the end connecting belt. Detailed implementation manners

[0026] The present invention will be further described in detail below with reference to the accompanying drawings. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0027] As Figures 1-6As shown in the figure, a multi-stage tea sorting device includes a feed hopper 1, a feed pipe 2, a feed cylinder 3, a motor 7, a sieve cylinder 8, a housing 9 and a chassis 11. The sieve cylinder 8 is installed inside the housing 9, the housing 9 is installed on the chassis 11, the feed cylinder 3 is connected to the feed end of the sieve cylinder 8, one end of the feed pipe 2 is connected to the bottom of the feed hopper 1, and the other end of the feed pipe 2 extends into the interior of the feed cylinder 3. The feed cylinder 3 is drivingly connected to the motor 7 through a transmission mechanism. The sieve cylinder 8 is in the shape of a frustum of a cone, and the diameter of the feed end is smaller than that of the tail end. The sieve cylinder 8 is composed of multiple sub-sieve cylinders, and the diameter of the sieve holes on the rear sub-sieve cylinder is larger than that of the front sub-sieve cylinder. A conical blanking cavity 10 is provided below each sub-sieve cylinder, and a material outlet 12 is provided at the bottom of each blanking cavity 10. A tail material cavity 19 is provided inside the housing 9 at the tail end of the sieve cylinder 19, and a tail material outlet 21 is provided at the bottom of the tail material cavity 19; each sub-sieve cylinder is composed of multiple arc-shaped sieve plates, and adjacent two arc-shaped sieve plates are connected by a side connection belt 14 made of a flexible material. A throwing plate 27 extending into the inner cavity of the sieve cylinder 8 is provided on one side of each arc-shaped sieve plate. The ends of adjacent two sub-sieve cylinders are connected by an end connection belt 28 made of a flexible material. Connection rings 16 are provided at both ends of each sub-sieve cylinder. The sub-sieve cylinder is connected to the inner wall of the feed cylinder 3 or the connection ring 13 through the connection rings 16 and a connection mechanism. The feed cylinder 3 and the connection ring 13 are both installed on the mounting seats 15 at different positions inside the housing 9 through bearings 24. A rotatable roller 18 is provided at the top of each mounting seat 15, and the outer wall of the roller 18 is in contact with the outer wall of the corresponding connection ring 16 of the sub-sieve cylinder. A number of evenly distributed convex blocks 17 are provided on the outer wall of the connection ring 16 on the circumference in contact with the roller 18; the connection mechanism includes a screw 25, a spring 26 and a connection hole. Multiple connection holes are evenly provided on the connection ring 16. The threaded end of the screw 25 passes through the connection hole and is in threaded cooperation with the threaded hole on the inner wall of the feed cylinder 3 or the inner wall of the connection ring 13. The spring 26 is sleeved on the screw 25 between the nut and the connection ring 16. The positions of the connection holes on each connection ring 16 are arranged in one-to-one correspondence with the positions of the convex blocks 17. The inner walls of the feed cylinder 3 and the connection ring 13 are both connected to a linkage shaft 22 located at the middle position of the sieve cylinder 8 through multiple connecting rods 23.

[0028] Further, as Figure 5 shown, the top of the convex block 17 is arc-shaped, with a right-angled side and an inclined side on both sides respectively, forming a structure similar to a right-angled trapezoid, and the inclined side of the convex block 17 is located on the front side of the rotation direction of the sieve cylinder 8 compared with the right-angled side.

[0029] Further, the convex blocks 17 at both ends of each arc-shaped sieve plate are arranged in a staggered manner, that is, the contact time of the convex blocks 17 at both ends with the roller 18 is staggered, so that the deformation time of both ends of the arc-shaped sieve plate is staggered, thereby increasing the vibration frequency of the arc-shaped sieve plate and dropping the stuck fresh leaves back into the sieve cylinder 8 under vibration.

[0030] Further, the transmission mechanism includes a gear ring 4, a gear 5 and a speed reducer 6. The gear ring 4 is located at the outer end of the feeding cylinder 3 and is integrally formed with the latter. The gear 5 meshes with the gear ring 4 for transmission, and the gear 5 is installed on the output shaft of the speed reducer 6. The motor 7 is connected to the input shaft of the speed reducer 6. The transmission mechanism can also adopt belt pulley transmission.

[0031] Further, a maintenance opening is provided at the outer end of the tailing cavity 19, and a maintenance cover plate 20 is installed on the maintenance opening. By opening the maintenance cover plate 20, the interior of the device can be maintained.

[0032] Further, both the side connecting belt 14 and the end connecting belt 28 are made of gauze, and are sewn and connected by sewing threads passing through the sewing holes reserved on the sieve cylinder 8. Making the side connecting belt 14 and the end connecting belt 28 of gauze can prevent the vibration between the arc-shaped sieve plates from being transmitted to each other, ensuring that only the arc-shaped sieve plate at the top vibrates when it rotates.

[0033] Further, the sieve cylinder 8 is formed by sequentially connecting three sub-sieve cylinders through a connecting ring 13, and multiple levels of sub-sieve cylinders can be designed according to actual screening requirements.

[0034] Further, the number of arc-shaped sieve plates included in each sub-sieve cylinder is different.

[0035] Further, the inner cavity of the feeding end of the feeding cylinder 3 is arranged in a conical structure with a gradually increasing diameter from the outside to the inside, preventing the material from pouring out of the feeding cylinder 3.

[0036] Further, the speed reducer 6 is a gear speed reducer.

[0037] Working principle: Freshly picked tea leaves are sent into the feeding hopper 1 through a conveyor. The tea leaves in the feeding hopper 1 slide into the feeding cylinder 3 through the feeding pipe 2. The feeding cylinder 3 rotates driven by the motor 7. The feeding cylinder 3 rotates and transmits the rotational torque to the connecting ring 13 through the linkage shaft 22 and the connecting rod 23. The feeding cylinder 3 and the connecting ring 13 transmit the torque to the sieve cylinder 8 through the screw 25 structure. The sieve cylinder 8 rotates accordingly. The tea leaves move towards the rear end along the frustum-shaped sieve cylinder 8 under the action of gravity. The throwing plate 27 plays a role in throwing the materials to prevent the tea leaves from accumulating and affecting the screening. When the sieve cylinder 8 moves to the arc-shaped sieve plate at the top, the convex block 17 on the end connecting ring 16 contacts the roller 18. The arc-shaped sieve plate experiences the process of being extruded and deformed and then returning to normal, thereby generating vibration, vibrating off the tea leaves stuck in the sieve holes and returning them to the sieve cylinder 8 for further sorting. The sorted tea leaves of different categories are collected by the corresponding material outlets 12, and the tailings are collected from the tailing outlet 21. The present invention solves the problem in the prior art that the whole sieve cylinder vibrates, resulting in the tea leaves at the bottom of the sieve cylinder being stuck tighter and tighter, and at the same time solves the defect that the use of a fan structure is likely to reduce the moisture in the tea leaves.

[0038] This specific embodiment is only an interpretation of the present invention and does not limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A multi-stage tea sorting device, comprising a feed hopper (1), a feed pipe (2), a feed cylinder (3), a motor (7), a screen cylinder (8), a shell (9) and a base frame (11), wherein the screen cylinder (8) is mounted in the inner cavity of the shell (9), the shell (9) is mounted on the base frame (11), the feed cylinder (3) is connected to the feed end of the screen cylinder (8), one end of the feed pipe (2) is connected to the bottom of the feed hopper (1), and the other end of the feed pipe (2) extends into the interior of the feed cylinder (3), characterized in that: The feed cylinder (3) is connected to the motor (7) through a transmission mechanism. The screen cylinder (8) is a truncated cone structure, and the diameter of the feed end is smaller than the diameter of the tail end. The screen cylinder (8) is composed of a plurality of sub-screen cylinders, and the diameter of the screen hole on the rear terminal screen cylinder is larger than the diameter of the front terminal screen cylinder. A conical material discharge cavity (10) is provided below each sub-screen cylinder, and a material outlet (12) is provided at the bottom of each material discharge cavity (10). A tail material cavity (19) is provided in the housing (9) at the tail end of the screen cylinder (19), and the bottom of the tail material cavity (19) is A tailing outlet (21) is provided; each sub-screen cylinder is composed of a plurality of arc-shaped screen plates, two adjacent arc-shaped screen plates are connected by a side connecting belt (14) made of a flexible material, one side of each arc-shaped screen plate is provided with a throwing plate (27) extending toward the inner cavity of the screen cylinder (8), the ends of two adjacent sub-screen cylinders are connected by an end connecting belt (28) made of a flexible material, both ends of each sub-screen cylinder are provided with a connecting ring (16), and the sub-screen cylinder is connected to the inner wall of the feed cylinder (3) or the connecting ring (13) through the connecting ring (16) and the connecting mechanism, so that The feed cylinder (3) and the connecting ring (13) are both mounted on mounting seats (15) at different positions inside the housing (9) via bearings (24); a rotatable roller (18) is provided on the top of each mounting seat (15); the roller (18) is fitted with the outer wall of the connecting ring (16) of the corresponding sub-screen cylinder; a plurality of evenly distributed protrusions (17) are provided on the outer wall of the connecting ring (16) and the circumference in contact with the roller (18); the connecting mechanism comprises a screw (25), a spring (26) and a connecting hole, and the plurality of connecting holes are evenly spaced. The screw (25) is arranged on the connecting ring (16), the threaded end of the screw rod (25) passes through the connecting hole and is threadedly matched with the threaded hole on the inner wall of the feed barrel (3) or the inner wall of the connecting ring (13), the spring (26) is sleeved on the screw rod (25) between the nut and the connecting ring (16), the position of the connecting hole on each connecting ring (16) is arranged in a one-to-one correspondence with the position of the protrusion (17), and the inner walls of the feed barrel (3) and the connecting ring (13) are connected to the linkage shaft (22) located in the middle position of the screen barrel (8) through a plurality of connecting rods (23).

2. A multi-stage tea sorting device according to claim 1, characterized in that: The top of the protrusion (17) is arc-shaped, and the two sides are right-angled sides and hypotenuses respectively. A structure similar to a right-angled trapezoid is formed, and the oblique side of the projection (17) is located at the front side of the rotation direction of the screen drum (8) compared with the right-angle side.

3. A multi-stage tea sorting device according to claim 2, characterized in that: The projections (17) at both ends of each arc-shaped screen plate are arranged in a staggered manner.

4. A multi-stage tea sorting device according to claim 3, characterized in that: The transmission mechanism comprises a ring gear (4), a gear (5) and a reducer (6); the ring gear (4) is located at the outer end of the feed barrel (3), and the two are integrally formed; the gear (5) meshes with the ring gear (4) for transmission; the gear (5) is mounted on the output shaft of the reducer (6); and the motor (7) is connected to the input shaft of the reducer (6).

5. The multi-stage tea sorting device according to claim 1, characterized in that: An inspection opening is provided at the outer end of the tailing cavity (19), and an inspection cover plate (20) is installed on the inspection opening.

6. A multi-stage tea sorting device according to claim 4, characterized in that: The side connection belt (14) and the end connection belt (28) are both made of gauze and are sewn together by passing sewing thread through the needle and thread holes reserved on the screen cylinder (8).

7. A multi-stage tea sorting device according to claim 6, characterized in that: The sieve cylinder (8) is composed of three sub-sieve cylinders connected in sequence via a connecting ring (13).

8. A multi-stage tea sorting device according to claim 7, characterized in that: Each sub-screen cylinder includes a different number of arc-shaped screen plates.

9. A multi-stage tea sorting device according to claim 1, characterized in that: The inner cavity of the feeding end of the feeding cylinder (3) is arranged to be a conical structure with a diameter gradually increasing from the outside to the inside.

10. The multi-stage tea sorting device according to claim 4, characterized in that: The reducer (6) is a gear reducer.

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