Selenium-rich primary tea processing conveying mechanism

Abstract

The application relates to the technical field of tea conveying and screening, and discloses a conveying mechanism for selenium-rich primary tea processing, which comprises a supporting frame, a transmission sleeve, a dust suction pipe, a chain wheel, a chain, a connecting rod, a chain plate, a dust suction sleeve and a push piece structure. When the chain plate is used for straight conveying, the inner circular surface and the outer circular surface are attached to support the tea leaves; when the end part is turned, a residue discharging gap is formed, and short rod scraps are sucked out by the dust suction sleeve, so that the residue separation and the negative pressure collection are completed in continuous conveying.

Description

Technical Field

[0001] This invention relates to the field of tea processing, conveying, and screening technology, specifically to a conveying mechanism for processing selenium-rich raw tea. Background Technology

[0002] Selenium-rich native tea usually requires continuous conveying during the processes of withering, fixation, rolling, shaping, drying and subsequent sorting. The conveying process must maintain the shape and integrity of the tea leaves while minimizing the entry of tea dust, short stem fragments and light impurities into subsequent processes.

[0003] Existing tea conveying equipment mostly adopts the form of ordinary belt conveyor, chain plate conveyor, vibrating screen conveyor, or air separation and dust collection combined conveyor. The ordinary conveying structure mainly completes the position transfer, while the screening structure relies on the screen hole size or vibration to remove fine debris from the tea leaves.

[0004] However, not all the debris produced during the processing of selenium-rich native tea is in powder form. Some of the debris is in the form of short rods or stems, which tend to overlap on the sieve holes or move with the tea leaves along their length. It is difficult to achieve stable separation during continuous conveying by simply relying on fixed sieve holes.

[0005] At the same time, directly increasing the sieve aperture or increasing the vibration can easily cause whole tea leaves to fall out accidentally, tea leaves to tumble excessively, or the conveying layer to become unstable. If only a dust suction pipe is installed at the end of the conveying process, short rod debris will still be mixed in the tea leaf layer during the conveying process and will be difficult to be fully captured by the negative pressure airflow. Summary of the Invention

[0006] This invention provides a conveying mechanism for processing selenium-rich raw tea, aiming to solve the problem that existing conveying and screening structures are unable to stably separate short rod-shaped debris from flake-shaped tea leaves during continuous conveying.

[0007] To achieve the above objectives, the conveying mechanism of the present invention uses a support frame as the installation base. A reducer and a motor are installed on the support frame. The reducer drives the transmission sleeve to rotate. The transmission sleeve is connected to the sprocket and drives multiple chain plates to move in a cycle through the chain and connecting rod. The end of the transmission sleeve away from the reducer is fitted onto the dust suction pipe. The dust suction pipe is connected to an external negative pressure device. Multiple dust suction sleeves are connected to the outer wall of the transmission sleeve, so that the negative pressure adsorption position can be arranged to follow the debris discharge area inside the chain plate.

[0008] The chain plate is connected to the connecting rod through sleeves and sealing tubes. The sleeves and sealing tubes of adjacent chain plates are staggered and fitted onto the same connecting rod, so that the chain plates can fit together in the straight conveying section. When entering the sprocket, they can change angle around the connecting rod. This angle change is used to form the timing of the discharge of short rod debris.

[0009] Sealing rings are installed at both ends of the sleeve, and a sealing groove is opened on the chain plate on one side of the sealing tube. The sealing ring is rotatably connected in the sealing groove, so that when the adjacent chain plates swing relative to each other, the leakage of material at the gap and external disturbance can still be reduced, and the tea support surface of the straight conveying section remains continuous.

[0010] Flat plates and inclined plates are staggered on the chain plate. One side of the inclined plate is connected to the sleeve, and the other side of the inclined plate forms an outer circular surface. An inner circular surface and an involute surface are formed on the sleeve. When adjacent chain plates are in the straight section, the outer circular surface fits into the inner circular surface. The inclined plate and the flat plates at both ends together form a downward-sloping support and separation space.

[0011] Multiple partitions are provided on the upper surface of the inclined panel. After the second paddle pushes the tea leaves and short rod fragments toward the inclined panel, the tea leaves are supported by the partitions due to their large area, while the short rod fragments can move from between the partitions or along the surface of the inclined panel to the contact area of ​​the outer and inner circular surfaces. The conveying vibration further promotes the separation of the two. The second paddle is attached to the flat plate and has a greater tilt angle than the first paddle.

[0012] Positioning sleeves are set at both ends of the support frame. The positioning sleeves are used to install the first inclined plate and the second inclined plate via positioning rods. The first deflector at the lower end of the first inclined plate maintains a distance from the flat plate and pre-pushes the tea leaves at a small angle. The second deflector at the lower end of the second inclined plate is attached to the flat plate and pushes the material towards the inclined plate at a larger angle, thereby avoiding the accumulation or damage of the tea leaves caused by forcibly flattening them at one time.

[0013] When the chain plate moves to the sprocket position, the angle between the adjacent chain plates changes, the outer circular surface no longer fits the inner circular surface and rotates relative to each other along the involute surface, and a slag discharge gap appears between the outer and inner circular surfaces. Short rod debris located near the fitting area can fall out along this slag discharge gap.

[0014] The dust collection sleeve is arranged on the inner side of the chain plate and faces the area where the inner and outer circular surfaces form the slag discharge gap. After the short rod debris falls out of the slag discharge gap, it is promptly sucked into the dust collection sleeve by the negative pressure airflow, and then enters the external negative pressure equipment collection path through the transmission sleeve and dust collection pipe, so that the debris is not easy to fall back into the tea layer.

[0015] The above structure means that the present invention does not simply rely on the sieve holes for screening, but forms a continuous and coordinated path through inclined support, spacer plate limiting, straight section sealing, end opening and negative pressure suction, which can adapt to the characteristic that short rod-shaped debris is not easy to fall on ordinary sieves.

[0016] In an optional embodiment, the chain plate, sleeve, sealing tube and connecting rod can be set as multiple sets of repeating units along the conveying width direction, and the dust suction sleeve is arranged corresponding to the inner area of ​​multiple chain plates so as to maintain the same separation and suction logic on tea processing conveying lines of different widths.

[0017] In an optional embodiment, the tilt angle, spacing, and installation height of the first and second paddles can be adjusted by the mating position of the positioning rod and the positioning sleeve to adapt to selenium-rich raw tea with different moisture content, different curvature, or different conveying thickness.

[0018] This invention combines a flat plate, an inclined plate, and a partition plate to create stratification of tea leaves while they are continuously conveyed on the chain plate. The leafy tea leaves are supported by the partition plate, and short rod debris moves along the inclined plate to the bonding area of ​​the adjacent chain plate, thus solving the problem that short rod debris is difficult to fall through ordinary sieve holes.

[0019] This invention utilizes the difference in posture between the chain plate in the straight section and the sprocket end. In the straight section, the inner and outer circular surfaces fit together to maintain support and seal. At the end, the outer circular surface moves away from the inner circular surface along the involute to form a slag discharge slot. This allows the timing of debris discharge to be naturally synchronized with the chain plate's cyclical movement, eliminating the need for additional complex independent opening and closing mechanisms.

[0020] The present invention arranges the dust suction sleeve on the inner side of the chain plate and faces the slag discharge gap. After the short rod debris comes out of the gap, it is sucked away by negative pressure, which can reduce the possibility of debris being carried back by the chain plate or mixed back into the tea layer, and improve the continuous cleaning ability during the conveying process.

[0021] This invention uses a first and a second paddle to form a two-stage sorting process of pre-paddle and pressing. The tea leaves are first gently contacted, and then the tea leaves and debris are pushed into the inclined panel area. This not only facilitates the material entering the separation path, but also reduces the impact of direct strong pressure spreading on the appearance of selenium-rich native tea.

[0022] This invention maintains the rotational connection and sealing fit of adjacent chain plates through sleeves, sealing pipes, sealing rings and sealing grooves, so that the chain plates are continuous when support is needed and open when slag needs to be discharged, which is suitable for the working conditions of conveying, screening and collecting debris in the continuous production line of selenium-rich raw tea. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a conveying mechanism for processing selenium-rich raw tea according to the present invention; Figure 2 This is a schematic diagram of the structure of the first inclined plate, the second inclined plate, the first shovel, and the second shovel of the present invention; Figure 3 This is a schematic diagram of the structure of the transmission sleeve, sprocket, chain, connecting rod, chain plate, suction pipe, and suction sleeve of the present invention; Figure 4 This is a schematic diagram of the structure of the chain plate and the dust collection sleeve in the present invention. Figure 5 This is a schematic diagram of the chain plate of the present invention; Figure 6 This is a schematic diagram of the structure of the sleeve, sealing tube, sealing ring, sealing groove, inner circular surface, and outer circular surface of the present invention; Figure 7 This is a cross-sectional view of the structure of the present invention when adjacent chain plates are in a straight conveying section; Figure 8 This is a cross-sectional view of the structure of the present invention when the adjacent chain plates change angle at the sprocket. In the diagram: 1. Support frame; 2. Reducer; 3. Motor; 4. Transmission sleeve; 5. Dust suction pipe; 6. Sprocket; 7. Chain; 8. Connecting rod; 9. Chain plate; 10. Dust suction sleeve; 11. Sleeve; 12. Sealing tube; 13. Sealing ring; 14. Sealing groove; 15. Flat plate; 16. Sloping plate; 17. Spacer plate; 18. Inner circular surface; 19. Involute surface; 20. Outer circular surface; 21. Positioning sleeve; 22. First sloping plate; 23. Second sloping plate; 24. Positioning rod; 25. First lever; 26. Second lever. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figures 1 to 8 As shown, a conveying mechanism for processing selenium-rich raw tea in this embodiment includes a support frame 1. The support frame 1 is fixedly installed at the corresponding position of the external tea processing equipment. The support frame 1 is used to bear the load of the chain conveying unit, the material sorting unit and the negative pressure suction unit.

[0026] A speed reducer 2 is installed at one end of the support frame 1. A motor 3 is connected to the speed reducer 2. The output end of the speed reducer 2 is connected to the transmission sleeve 4. The motor 3 drives the transmission sleeve 4 to rotate at a speed suitable for tea conveying through the speed reducer 2, thereby avoiding excessive jumping of the tea leaves caused by the chain plate 9 running too fast.

[0027] A suction pipe 5 is fixedly installed at the end of the support frame 1 away from the reducer 2. The end of the transmission sleeve 4 away from the reducer 2 is sleeved on the suction pipe 5. The suction pipe 5 is connected to the external negative pressure equipment. The transmission sleeve 4 can rotate relative to the suction pipe 5 and provide a negative pressure passage for the suction sleeve 10 inside the chain plate 9.

[0028] Two sprockets 6 are fixedly installed at both ends of the transmission sleeve 4. A chain 7 is wound around both sprockets 6. Multiple connecting rods 8 are connected at equal intervals between the two chains 7. The connecting rods 8 serve as the lateral support and swing reference for multiple chain plates 9, enabling the chain plates 9 to move cyclically with the chain 7.

[0029] Multiple chain plates 9 are equally spaced on the connecting rod 8. The chain plates 9 together form a continuous conveying surface for supporting tea leaves in the straight section of the conveyor. After the tea leaves fall on the chain plates 9, they move with the chain 7 and are sorted by the first deflector 25 and the second deflector 26 before entering the separation area corresponding to the inclined panel 16.

[0030] Multiple dust suction sleeves 10 are connected at equal intervals on the outer wall of the transmission sleeve 4. The multiple dust suction sleeves 10 are located inside the chain plate 9. The position of the dust suction sleeve 10 corresponds to the area where the adjacent chain plate 9 forms a slag discharge gap when it turns at the end, so that the short rod debris that comes out from between the chain plates 9 can be carried away by the negative pressure airflow in time.

[0031] Multiple sleeves 11 and multiple sealing tubes 12 are provided at equal intervals at both ends of each chain plate 9. When two adjacent chain plates 9 are connected end to end, the sealing tubes 12 and sleeves 11 are together sleeved on a connecting rod 8, so that adjacent chain plates 9 can both swing relative to each other around the connecting rod 8 and form a continuous support relationship in the straight section.

[0032] Each sleeve 11 is provided with a sealing ring 13 at both ends. A sealing groove 14 is provided on the chain plate 9 on one side of the sealing tube 12. The sealing ring 13 is rotatably connected in the sealing groove 14. The sealing ring 13 maintains partial sealing and support when the chain plate 9 swings relative to each other, reducing the tea dust from falling out randomly from non-dregs discharge positions.

[0033] Multiple flat plates 15 and inclined plates 16 are arranged at equal intervals on the chain plate 9. One side of the inclined plate 16 is connected to the sleeve 11, and the other side of the inclined plate 16 has an outer circular surface 20. The other side of the flat plate 15 is connected to the sealing tube 12. The flat plate 15 is used to form a stable support, and the inclined plate 16 is used to form an inclined guide for short rod debris to move towards the edge of the mating.

[0034] Multiple spacers 17 are evenly spaced on the upper surface of the inclined panel 16. The spacers 17 form multiple support and separation positions along the surface of the inclined panel 16. Because of their large width and area, the tea leaves are easily blocked by the spacers 17 and stay above the spacers 17, while short rods and debris are more likely to cross or pass through the gap between adjacent spacers 17.

[0035] The sleeve 11 is provided with an inner circular surface 18, and the transition surface between the inner circular surface 18 and the sleeve 11 is an involute surface 19. When the adjacent chain plate 9 is in the straight conveying section, the outer circular surface 20 is attached to the inner circular surface 18, and the inclined plate 16 and the two end flat plates 15 together form a relatively closed inclined support space.

[0036] In the straight conveyor section, tea leaves and short rod debris move forward with the chain plate 9. The slight vibration generated by the operation of the equipment causes the short rod debris to gradually move along the inclined plate 16 to the contact area between the outer circular surface 20 and the inner circular surface 18, while the tea leaves continue to be supported above the inclined plate 16 by the partition plate 17.

[0037] Two sets of positioning sleeves 21 are equally spaced at both ends of the support frame 1. A first inclined plate 22 and a second inclined plate 23 are obliquely arranged on the positioning sleeve 21. Positioning rods 24 are respectively arranged at both ends of the first inclined plate 22 and the second inclined plate 23. The positioning rods 24 are inserted into the positioning sleeve 21 to maintain the installation angle and position of the material feeding structure.

[0038] The lower end of the first inclined plate 22 is provided with a first deflector 25, and the lower end of the second inclined plate 23 is provided with a second deflector 26. The first deflector 25 maintains a certain distance from the flat plate 15 and has a small tilt angle, while the second deflector 26 is in contact with the flat plate 15 and has a larger tilt angle, thus forming a two-stage material feeding path of pre-sorting followed by forced pushing.

[0039] When the tea leaves enter the area above the chain plate 9, they first come into contact with the first deflector 25. Since the first deflector 25 is a certain distance away from the flat plate 15 and at a small angle, it only pre-deflects the tea leaves that are higher or locally piled up, so that the tea leaves will not be pressed into an excessively thin layer at once.

[0040] As the chain plate 9 continues to move, the tea leaves reach the position of the second deflector 26. The second deflector 26 adheres to the flat plate 15 and has a larger tilt angle. The second deflector 26 pushes all the tea leaves and the short rod fragments mixed in with them toward the multiple inclined plates 16, so that the material enters the separation area formed by the partition plate 17 and the inclined plates 16.

[0041] After the tea leaves are placed on the inclined plate 16, the larger tea leaf pieces are stuck on multiple partition plates 17, while the short rod debris slides down the inclined plate 16 due to its smaller size. The partition plates 17 do not significantly obstruct the short rod debris, thus allowing the tea leaves and short rod debris to gradually separate during the straight conveying process of the chain plate 9.

[0042] When the chain plate 9 moves to the position of the sprocket 6, the front chain plate 9 and the rear chain plate 9 change angle around the connecting rod 8. The outer circular surface 20 no longer continuously adheres to the inner circular surface 18. The outer circular surface 20 rotates relative to the involute surface 19 and forms a slag discharge gap. The short rod debris that has accumulated near the contact area falls out along the slag discharge gap.

[0043] The dust suction sleeve 10 is always facing the area of ​​the inner circular surface 18 and the outer circular surface 20 on the inner side of the chain plate 9. After the short rod debris comes out from the slag discharge seam, it is subjected to the negative pressure adsorption of the dust suction sleeve 10. After the debris enters the dust suction sleeve 10, it is sent to the external negative pressure equipment through the transmission sleeve 4 and the dust suction pipe 5, so as to prevent the debris from flying around the sprocket 6 or falling back onto the chain plate 9.

[0044] Because the chain plate 9 is kept in contact with the outer circular surface 20 and the inner circular surface 18 in the straight section, the short rod debris will not leak out in large quantities before reaching the slag discharge position. It will only be discharged in a concentrated manner after the slag discharge gap is formed by the change of the angle of the chain plate 9 at the sprocket 6, thus making the screening and collection position more stable.

[0045] The sealing rings 13 and sealing grooves 14 at both ends of the sleeve 11 can also reduce air and material leakage at the intersection of adjacent chain plates 9, and make the suction force act more on the vicinity of the slag discharge seam during negative pressure adsorption, rather than dispersed into the non-target gaps between the chain plates 9.

[0046] In this embodiment, the first inclined plate 22 and the second inclined plate 23 can be installed and maintained through the insertion position of the positioning rod 24 and the positioning sleeve 21. Multiple first paddles 25 and second paddles 26 are distributed along the conveying width direction so that tea leaves at different lateral positions can be fed into the corresponding inclined plate 16.

[0047] In this embodiment, the tilt angle of the inclined panel 16, the height of the partition plate 17, and the distance between adjacent partition plates 17 can be adjusted according to the shape, moisture content, and short rod fragment size of the selenium-rich raw tea. During the adjustment, the separation logic of the tea leaves being supported by the partition plate 17 and the fragments moving towards the bonding area is still maintained.

[0048] In this embodiment, the suction pipe 5 can be connected to a bag filter, cyclone separator or other external negative pressure collection device. External negative pressure device is not a necessary limitation of this application, as long as it can form a negative pressure airflow in the suction pipe 5 to carry the short rod debris away from the inside of the chain plate 9.

[0049] In this embodiment, the chain plate 9, sleeve 11, sealing tube 12 and connecting rod 8 can be made of metal or wear-resistant materials commonly used in food processing equipment, and the sealing ring 13 can be made of elastic material suitable for tea processing environment so as to maintain stable cooperation under frequent swing and negative pressure adsorption conditions.

[0050] The working process of this embodiment is as follows: the motor 3 drives the transmission sleeve 4 to rotate via the reducer 2, and the sprocket 6, chain 7 and connecting rod 8 drive the chain plate 9 to circulate and transport tea leaves. The first deflector 25 performs pre-deflection, and the second deflector 26 pushes the tea leaves and short rod debris towards the inclined plate 16. The partition plate 17 supports the tea leaves, and the short rod debris flows along the inclined plate 16 into the contact area between the inner circular surface 18 and the outer circular surface 20. After the chain plate 9 reaches the sprocket 6, it forms a slag discharge gap and the debris is sucked out by the negative pressure of the dust suction sleeve 10.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Without departing from the core concept of the present invention, those skilled in the art can make equivalent adjustments to the number of chain plates, the number of paddles, the arrangement density of the dust collection sleeve, and the angle of the inclined panel.

Claims

1. A conveying mechanism for processing selenium-rich raw tea, comprising a support frame (1), a reducer (2) mounted on the support frame (1), and a motor (3), characterized in that: The reducer (2) is connected to the transmission sleeve (4). The transmission sleeve (4) is fitted outside the suction pipe (5) and connected to the sprocket (6). The sprocket (6) drives multiple connecting rods (8) to move in a cycle via the chain (7). The connecting rods (8) are fitted with chain plates (9). The outer wall of the transmission sleeve (4) is connected to the suction sleeve (10) located inside the chain plate (9). The chain plate (9) has a flat plate (15), a slanted plate (16), a sleeve (11) and a sealing pipe (12). The slanted plate (16) is provided with a spacer plate (17). The adjacent chain plates (9) are supported by the inner circular surface (18) and the outer circular surface (20) in the straight section. At the sprocket (6), the angle changes around the connecting rod (8) and the outer circular surface (20) moves away from the inner circular surface (18) along the involute surface (19) to form a slag discharge seam. The suction sleeve (10) faces the slag discharge seam.

2. The conveying mechanism for processing selenium-rich raw tea according to claim 1, characterized in that: The suction pipe (5) is fixedly installed on the support frame (1) at the end away from the reducer (2), and the transmission sleeve (4) at the end away from the reducer (2) is sleeved on the outside of the suction pipe (5). The suction pipe (5) is used to connect with the external negative pressure equipment.

3. The conveying mechanism for processing selenium-rich raw tea according to claim 1, characterized in that: Two sprockets (6) are fixedly installed at both ends of the transmission sleeve (4). Chains (7) are wound around the two sprockets (6). Multiple connecting rods (8) are connected at equal intervals between the two chains (7). Multiple chain plates (9) are arranged at equal intervals along the length of the connecting rods (8).

4. The conveying mechanism for processing selenium-rich raw tea according to claim 1, characterized in that: Each chain plate (9) has a sleeve (11) and a sealing tube (12) at both ends. The sleeves (11) and sealing tubes (12) of adjacent chain plates (9) are staggered and together fitted on the same connecting rod (8).

5. The conveying mechanism for processing selenium-rich raw tea according to claim 4, characterized in that: Both ends of the sleeve (11) are provided with sealing rings (13), and a sealing groove (14) is provided on the chain plate (9) on one side of the sealing tube (12). The sealing ring (13) is rotatably connected in the sealing groove (14).

6. The conveying mechanism for processing selenium-rich raw tea according to claim 1, characterized in that: Multiple flat plates (15) and multiple inclined plates (16) are arranged at equal intervals on the chain plate (9). One side of the inclined plate (16) is connected to the sleeve (11), and the other side of the inclined plate (16) has an outer circular surface (20). The flat plate (15) is connected to the sealing pipe (12).

7. The conveying mechanism for processing selenium-rich raw tea according to claim 6, characterized in that: An inner circular surface (18) is provided on the sleeve (11), and an involute surface (19) is provided between the inner circular surface (18) and the sleeve (11). When the adjacent chain plates (9) are in the straight conveying section, the outer circular surface (20) is attached to the inner circular surface (18). When the adjacent chain plates (9) are rotated into the sprocket (6), the outer circular surface (20) rotates relative to the involute surface (19).

8. The conveying mechanism for processing selenium-rich raw tea according to claim 1, characterized in that: Multiple spacers (17) are evenly spaced on the upper surface of the inclined panel (16). A guide gap is formed between adjacent spacers (17) to allow short rod debris to slide downwards. The upper end of the spacer (17) is used to support the tea leaves.

9. The conveying mechanism for processing selenium-rich raw tea according to claim 1, characterized in that: Two sets of positioning sleeves (21) are set at equal intervals at both ends of the support frame (1). A first inclined plate (22) and a second inclined plate (23) are set obliquely on the positioning sleeve (21). Positioning rods (24) for inserting into the positioning sleeve (21) are set at both ends of the first inclined plate (22) and the second inclined plate (23).

10. The conveying mechanism for processing selenium-rich raw tea according to claim 9, characterized in that: The lower end of the first inclined plate (22) is provided with a first paddle (25), and the lower end of the second inclined plate (23) is provided with a second paddle (26). The first paddle (25) is spaced apart from the flat plate (15), and the second paddle (26) is attached to the flat plate (15) and has a greater tilt angle than the first paddle (25).

Images