Multi-stage sorting device and sorting method for health-care tea product processing

Abstract

The invention relates to the technical field of sorting devices, and discloses a multi-stage sorting device and a sorting method for health-care tea product processing.The multi-stage sorting device comprises a conveyor, an air source, a camera and a movable arm, the camera and the movable arm are installed above the conveyor, a collecting pipe and a driving assembly are installed on the movable arm, and the collecting pipe is used for sorting sundries; the top end of the collecting pipe is closed, a fixator used for fixing sundries is installed in the collecting pipe, and an airflow control assembly is connected between the collecting pipe and the air source. By arranging the driving assembly, the collecting pipe, the fixing device and the airflow control assembly, when sundries in materials are visually detected, the sundries are fixed through the fixing device, then the materials around the sundries are blown away, finally the sundries are loosened, the sundries are independently sucked away, in this way, automatic sorting work of the sundries or defective products can be achieved, and the working efficiency is improved. And compared with a direct impurity sucking and removing mode, the loss of the materials can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sorting devices, in particular to a multi-stage sorting device and a sorting method for processing health tea products. Background Art

[0002] In addition to common tea leaves, health teas also include other Chinese medicinal materials. The selection of raw materials is particularly important during production. Not only do we need to remove impurities such as plastics and metals, but we also need to select raw materials of the same color and size. Therefore, screening and sorting are often required during processing. In the prior art, in order to improve the sorting efficiency, a type of visual sorting device has emerged. This type of visual sorting device is based on a visual detection system and is provided with a movable arm and a negative pressure adsorption system. When the material moves on the conveyor, the camera performs video monitoring. When foreign objects or defective products in the raw materials are identified, the movable arm moves to the defective product, and the suction generated by the negative pressure adsorption system is used to suck away the foreign objects to achieve sorting. However, this type of sorting device still has certain problems: since the raw materials of health teas are mostly dry plant stems, leaves and fruits, which are light in weight, it is inevitable that some normal raw materials around the foreign objects will be sucked away when the foreign objects are absorbed by suction, resulting in a large loss. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a multi-stage sorting device and a sorting method for health tea processing, which have the advantages of high sorting efficiency and low loss, and solves the problem that the existing sorting device will suck away some normal raw materials and debris together during negative pressure adsorption sorting, resulting in large losses.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-stage sorting device, comprising a conveyor, an air source, a camera installed above the conveyor and a movable arm, the movable arm is equipped with a collecting pipe and a driving assembly, the collecting pipe is used to sort debris, the top of the collecting pipe is closed and a fixture for fixing debris is installed inside, and an airflow control assembly is connected between the collecting pipe and the air source;

[0005] The driving assembly is in driving connection with the holder and the collecting pipe, and the driving assembly is used to drive the holder and the collecting pipe to move toward the conveyor surface respectively;

[0006] The airflow control component is used to regulate the airflow output by the air source, forcing the end of the collecting tube to generate positive air pressure or negative air pressure;

[0007] When the camera detects sundries, the movable arm controls the collecting pipe and the fixator to move above the sundries. The driving component operates. First, it drives the fixator to move, forcing the fixator to press tightly against the sundries. Subsequently, the air flow control component operates, forcing a positive air pressure to be generated at the end of the collecting pipe to blow away the materials around the sundries. After that, the driving component operates. While driving the fixator to disengage from the sundries, it also drives the collecting pipe to move and sleeve over the sundries. Finally, the air flow control component operates again, forcing a negative air pressure to be generated at the end of the collecting pipe to suck away the sundries.

[0008] Preferably, the collecting pipe is movably inserted into the bottom end of the movable arm. The fixator includes a vertical shaft disposed in the collecting pipe. The top end of the vertical shaft is movably inserted into the top wall of the collecting pipe. A circular plate is fixed to the bottom end of the vertical shaft, and an inner flexible insertion pin is fixed to the center of the bottom of the circular plate.

[0009] Preferably, a circular tube is provided above the circular plate. The circular tube is sleeved outside the vertical shaft. A plurality of outer flexible insertion pins distributed in an annular array are fixed to the bottom of the circular tube. The outer flexible insertion pins are movably inserted into the circular plate. A return spring is also fixedly connected between the circular tube and the circular plate. A notch is formed in the side wall of the circular tube. One side inner wall of the notch is provided with a slope. An activity ring is further provided above the circular tube. The activity ring is rotatably connected to the vertical shaft. A toothed ring is fixed to the top edge of the activity ring. A connecting rod is fixed to the bottom edge of the activity ring. A driving shaft is fixed to the bottom end of the connecting rod. The driving shaft extends into the notch. An adjusting motor is also fixed to the side wall of the vertical shaft. An adjusting gear is fixed to the output shaft of the adjusting motor. The adjusting gear meshes with the toothed ring.

[0010] Preferably, the driving component includes a main rack and a sub-rack slidably connected to the movable arm. The bottom end of the main rack is fixedly connected to the top end of the vertical shaft. The bottom end of the sub-rack is fixedly connected to the collecting pipe. The driving component further includes a driving motor fixed to the movable arm. A driving gear is fixed to the output shaft of the driving motor. The driving gear meshes with both the main rack and the sub-rack.

[0011] Preferably, the air flow control component includes a main air pipe. One end of the main air pipe is connected to an air source. The other end of the main air pipe is connected to a vacuum generator. A suction pipe is connected to the vacuum generator. One end of the suction pipe is connected to the collecting pipe. A storage barrel is also fixedly installed in the middle of the suction pipe.

[0012] Preferably, a branch pipe is also fixedly connected to the main air pipe. One end of the branch pipe is connected to the suction pipe. A first valve is installed on the main air pipe. The first valve is located between the vacuum generator and the branch pipe. A second valve is installed at the end of the branch pipe close to the main air pipe. A third valve is installed at the end of the branch pipe close to the suction pipe.

[0013] Preferably, a vertically arranged baffle is fixed on the surface of the conveyor, and a gap is provided between the bottom edge of the baffle and the surface of the conveyor. The baffle is used to block the materials on the conveyor that exceed the standard thickness.

[0014] Preferably, a cleaning component is arranged on the baffle. The cleaning component is used to clean the materials blocked in front of the baffle.

[0015] Preferably, the cleaning component includes a screw rod and a guide rod that are distributed in parallel. A nut seat is threadedly connected to the screw rod. The guide rod passes through the nut seat and is movably inserted into the nut seat. Both ends of the screw rod are rotatably connected to the baffle, and both ends of the guide rod are rotatably connected to the baffle. A base shaft is rotatably connected to the nut seat. A plurality of fan blades distributed in an annular array are fixed on one side of the base shaft close to the baffle. A driven gear is fixed on the other side of the base shaft away from the baffle. A driven rack is engaged with the top of the driven gear. Both ends of the driven rack are fixed to the baffle. The cleaning component further includes a driving motor fixed at the end of the baffle, and the output shaft of the driving motor is fixed to the end of the screw rod.

[0016] The present invention also discloses a sorting method for processing health care tea products. This sorting method for processing health care tea products uses the above-mentioned multi-stage sorting device.

[0017] Compared with the prior art, the present invention provides a multi-stage sorting device and a sorting method for processing health care tea products, which have the following beneficial effects:

[0018] 1. For this multi-stage sorting device and the sorting method for processing health care tea products, by setting a driving component, a collecting pipe, a fixator and an air flow control component, when visual inspection detects foreign matters in the materials, first fix the foreign matters through the fixator, then blow away the materials around the foreign matters, finally release the foreign matters, and separately suck away the foreign matters. By using this method, the automatic sorting work of foreign matters or defective products can be realized, and compared with the method of directly sucking away foreign matters, the loss of materials can be reduced.

[0019] 2. For this multi-stage sorting device and the sorting method for processing health care tea products, by setting a fixator, the foreign matters are fixed by the downward movement of the inner flexible needles to prevent the foreign matters from being blown away. And a plurality of groups of outer flexible needles are arranged outside the inner flexible needles. When the adjustment motor is started, it can drive the outer flexible needles to move downward to be flush with the inner flexible needles, thereby increasing the effective fixing area of the fixator, being conducive to adjusting the fixing area according to the size of the foreign matters, and further improving the fixing effect, with high applicability.

[0020] 3. The multi - stage sorting device and the sorting method for health tea processing can control the height of materials by setting baffles, which can block the materials and avoid affecting the subsequent visual monitoring accuracy due to material accumulation. By setting a cleaning component, the fan blades rolling along the baffle can push the materials accumulated at the edge of the baffle, thus avoiding the situation of reduced feeding efficiency caused by material blockage at the baffle edge. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic perspective structure of a multi - stage sorting device of the present invention Figure 1 ;

[0022] Figure 2 Schematic perspective structure of a multi - stage sorting device of the present invention Figure 2 ;

[0023] Figure 3 Schematic perspective structure of the movable arm of the present invention Figure 1 ;

[0024] Figure 4 Schematic perspective structure of the movable arm of the present invention Figure 2 ;

[0025] Figure 5 Schematic cross - sectional view of the collection pipe of the present invention;

[0026] Figure 6 of the present invention Figure 5 Enlarged view of part A;

[0027] Figure 7 Schematic structure diagram of the circular pipe of the present invention;

[0028] Figure 8 Schematic structure diagram of the cleaning component of the present invention.

[0029] In the figure: 1, conveyor; 2, air source; 3, camera; 4, movable arm; 5, collecting tube; 6, driving assembly; 61, main rack; 62, auxiliary rack; 63, driving motor; 64, driving gear; 7, fixing device; 701, vertical axis; 702, circular plate; 703, inner flexible pin; 704, circular tube; 705, outer flexible pin; 706, return spring; 707, notch; 708, ramp; 709, movable ring; 710, gear ring; 711, connecting rod; 712, driving Drive shaft; 713, regulating motor; 714, regulating gear; 8, air flow control assembly; 81, main air pipe; 82, vacuum generator; 83, suction tube; 84, storage bucket; 85, branch pipe; 86, first valve; 87, second valve; 88, third valve; 9, baffle; 10, cleaning assembly; 101, screw; 102, guide rod; 103, nut seat; 104, base shaft; 105, fan blade; 106, driven gear; 107, driven rack; 108, transmission motor. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a multi-stage sorting device and a sorting method for processing health tea products.

[0032] Example 1: Please refer to Figures 1 - 3 A multi-stage sorting device comprises a conveyor 1, an air source 2, a camera 3 installed above the conveyor 1 and a movable arm 4, a collecting pipe 5 and a driving assembly 6 are installed on the movable arm 4, the collecting pipe 5 is used to sort debris, the top of the collecting pipe 5 is closed and a fixture 7 for fixing debris is installed inside, and an airflow control assembly 8 is connected between the collecting pipe 5 and the air source 2;

[0033] The driving assembly 6 is in driving connection with the fixing device 7 and the collecting pipe 5, and the driving assembly 6 is used to drive the fixing device 7 and the collecting pipe 5 to move toward the surface of the conveyor 1 respectively;

[0034] The airflow control assembly 8 is used to regulate the airflow output by the air source 2, forcing the end of the collecting tube 5 to generate positive air pressure or negative air pressure;

[0035] When the camera 3 detects sundries, the movable arm 4 controls the collection pipe 5 and the fixture 7 to move above the sundries. The driving assembly 6 operates. First, it drives the fixture 7 to move, forcing the fixture 7 to press tightly on the sundries. Subsequently, the air flow control assembly 8 operates, forcing a positive air pressure to be generated at the end of the collection pipe 5 to blow away the materials around the sundries. After that, the driving assembly 6 operates. While driving the fixture 7 to disengage from the sundries, it also drives the collection pipe 5 to move and sleeve over the sundries. Finally, the air flow control assembly 8 operates again, forcing a negative air pressure to be generated at the end of the collection pipe 5 to suck away the sundries.

[0036] Among them, the air source 2 is set as an air compressor. The collection pipe 5 and the fixture 7 are both vertically arranged. A gap is provided between the fixture 7 and the inner wall of the collection pipe 5. In practical applications, multiple sets of devices connected end to end are arranged on the sorting production line to achieve multi-stage sorting, so as to reduce the omission of sundries or defective products and improve the sorting efficiency.

[0037] During use, first evenly sprinkle the raw materials of the health tea product on the conveyor 1. When the conveyor 1 operates, it conveys the raw materials. The raw materials pass under the camera 3 and the movable arm 4 in sequence. The visual inspection detects sundries. Subsequently, the movable arm 4 operates and drives the fixture 7 and the collection pipe 5 to move above the sundries. After that, the driving assembly 6 is started. After the driving assembly 6 operates, it drives the fixture 7 to move downward. After the fixture 7 moves downward, it presses and fixes the sundries. Then the air flow control assembly 8 is started. The air flow control assembly 8 causes a positive air pressure to be generated at the bottom end of the collection pipe 5, thereby blowing the raw materials around the sundries to make the raw materials away from the sundries. Then the driving assembly 6 is started again. The driving assembly 6 drives the fixture 7 to move upward, causing the fixture 7 to disengage from the sundries. At the same time, it also drives the collection pipe 5 to move downward. The collection pipe 5 sleeves over the sundries. At this time, the air flow control assembly 8 is started. The air flow control assembly 8 causes a negative air pressure to be generated at the bottom end of the collection pipe 5, and the suction force sucks the sundries into the collection pipe 5. The sundries pass through the gap between the fixture 7 and the collection pipe 5 and are finally discharged. Repeat the above operation process to continuously sort the sundries on the materials.

[0038] By setting the driving assembly 6, the collection pipe 5, the fixture 7 and the air flow control assembly 8, when the visual inspection detects sundries in the materials, first fix the sundries through the fixture 7, then blow away the materials around the sundries, finally release the sundries, and suck away the sundries alone. Using this method can realize the automatic sorting work of sundries or defective products, and compared with the method of directly sucking away sundries, it can reduce the loss of materials.

[0039] Embodiment 2: Refer to Figures 4 - 7, different from the above embodiments, the collecting tube 5 is movably inserted into the bottom end of the movable arm 4. The fixator 7 includes a vertical shaft 701 disposed in the collecting tube 5. The top end of the vertical shaft 701 is movably inserted into the top wall of the collecting tube 5. A circular plate 702 is fixed to the bottom end of the vertical shaft 701. An inner flexible pin 703 is fixed to the center of the bottom of the circular plate 702. Above the circular plate 702, there is a circular tube 704. The circular tube 704 is sleeved outside the vertical shaft 701. A plurality of outer flexible pins 705 distributed in an annular array are fixed to the bottom of the circular tube 704. The outer flexible pins 705 are movably inserted into the circular plate 702. A return spring 706 is also fixedly connected between the circular tube 704 and the circular plate 702. A notch 707 is formed in the side wall of the circular tube 704. One side inner wall of the notch 707 is provided with a slope 708. Above the circular tube 704, there is also a movable ring 709. The movable ring 709 is rotatably connected to the vertical shaft 701. A toothed ring 710 is fixed to the top edge of the movable ring 709. A connecting rod 711 is fixed to the bottom edge of the movable ring 709. A drive shaft 712 is fixed to the bottom end of the connecting rod 711. The drive shaft 712 extends into the notch 707. An adjustment motor 713 is also fixed to the side wall of the vertical shaft 701. An adjustment gear 714 is fixed to the output shaft of the adjustment motor 713. The adjustment gear 714 meshes with the toothed ring 710.

[0040] Among them, the inner flexible pin 703 and the outer flexible pin 705 have the same structure. The bottom ends of the inner flexible rod and the outer flexible pin 705 are both made of rubber material. A plurality of inner flexible pins 703 are provided at the center of the bottom of the circular plate 702 and are evenly distributed in a circular area. In the initial state, the height of the bottom end of the outer flexible pin 705 is higher than that of the bottom end of the inner flexible pin 703. In practical applications, the circular tube 704 and the outer flexible pins 705 are provided in multiple groups. The central axes of the multiple groups of circular tubes 704 coincide, and the diameters gradually increase from the inside to the outside. Moreover, the widths of the notches 707 on the multiple groups of circular tubes 704 gradually expand from the inside to the outside;

[0041] In use, after the driving component 6 operates, it drives the entire fixator 7 to move towards the debris on the conveyor 1, that is, the vertical shaft 701, the circular plate 702, and the inner flexible pin 703 move downward. After the bottom end of the inner flexible pin 703 contacts the debris, the debris is pressed and fixed to prevent the debris from being blown away by the positive air pressure. In practical applications, the sizes of the debris vary. If the fixing effect is poor only by the inner flexible pin 703, the adjusting motor 713 is started at this time. After the adjusting motor 713 operates, it drives the adjusting gear 714 to rotate. When the adjusting gear 714 rotates, it drives the toothed ring 710 to rotate. When the toothed ring 710 rotates, it drives the movable ring 709 to rotate. When the movable ring 709 rotates, it drives the connecting rod 711 and the drive shaft 712 to rotate around the vertical shaft 701. During the rotation of the drive shaft 712, it contacts the slope 708 on the side wall of the notch 707, and squeezes the slope 708 to make the circular tube 704 move downward. When the circular tube 704 moves downward, it drives the outer flexible pin 705 to move downward, and also compresses the return spring 706. Finally, the circular tube 704 moves downward to the bottom of the drive shaft 712, and the outer flexible pin 705 moves to be flush with the inner flexible pin 703. At this time, the effective fixing area at the bottom of the fixator 7 increases.

[0042] By setting the fixator 7, the debris is fixed by the downward movement of the inner flexible pin 703 to prevent the debris from being blown away. And a plurality of groups of outer flexible pins 705 are arranged outside the inner flexible pin 703. When the adjusting motor 713 is started, it can drive the outer flexible pins 705 to move downward to be flush with the inner flexible pin 703, thereby increasing the effective fixing area of the fixator 7, which is beneficial to adjusting the fixing area according to the size of the debris, and further improving the fixing effect and having high applicability.

[0043] Embodiment 3. Refer to Figure 3 and Figure 4 , different from the above embodiment, the driving component 6 includes a main rack 61 and a sub-rack 62 that are slidably connected to the movable arm 4. The bottom end of the main rack 61 is fixedly connected to the top end of the vertical shaft 701, the bottom end of the sub-rack 62 is fixedly connected to the collection pipe 5, the driving component 6 further includes a driving motor 63 fixed to the movable arm 4, and a driving gear 64 is fixed to the output shaft of the driving motor 63. The driving gear 64 meshes with both the main rack 61 and the sub-rack 62 at the same time.

[0044] Among them, the main rack 61 and the secondary rack 62 are respectively located on both sides of the driving gear 64. During use, when the driving motor 63 operates, it drives the driving gear 64 to rotate. The driving gear 64 drives the main rack 61 to move downward, and at the same time drives the secondary rack 62 to move upward. When the main rack 61 moves downward, it drives the vertical shaft 701, the inner flexible insertion pin 703 at the bottom of the vertical shaft 701 and the remaining parts to move downward, pressing and fixing the sundries. When the secondary rack 62 moves upward, it drives the collection pipe 5 to move upward. When the driving motor 63 drives the driving gear 64 to rotate in the reverse direction, the main rack 61 moves upward and the secondary rack 62 moves downward. At this time, the fixator 7 moves upward to release the fixation of the sundries, and the collection pipe 5 moves downward with the secondary rack 62 and is sleeved on the sundries;

[0045] By setting the driving assembly 6, after the driving motor 63 operates, it drives the main rack 61 and the secondary rack 62 to move in the reverse direction respectively, and then drives the fixator 7 and the collection pipe 5 to move in the reverse direction, so as to fix the sundries and suck out the sundries.

[0046] Embodiment 4, refer to Figure 3 and Figure 4 ., different from the above embodiment, the air flow control assembly 8 includes a main air pipe 81. One end of the main air pipe 81 is connected to the air source 2, and the other end of the main air pipe 81 is connected with a vacuum generator 82. A suction pipe 83 is connected to the vacuum generator 82. One end of the suction pipe 83 is connected to the collection pipe 5. A storage barrel 84 is fixedly installed in the middle of the suction pipe 83. A branch pipe 85 is fixedly connected to the main air pipe 81. One end of the branch pipe 85 is connected to the suction pipe 83. A first valve 86 is installed on the main air pipe 81. The first valve 86 is located between the vacuum generator 82 and the branch pipe 85. A second valve 87 is installed at one end of the branch pipe 85 close to the main air pipe 81, and a third valve 88 is installed at one end of the branch pipe 85 close to the suction pipe 83.

[0047] Among them, in the initial state, the first valve 86 is open, and the second valve 87 and the third valve 88 are closed. During use, if it is necessary to suck sundries at the bottom of the collection pipe 5, start the air source 2. The air source 2 outputs high-pressure air flow into the main air pipe 81. Under the action of the vacuum generator 82, a suction force is generated in the suction pipe 83, so that a suction force is generated at the bottom of the collection pipe 5. The sundries are sucked through the collection pipe 5 and the suction pipe 83 in sequence under the action of the suction force and enter the storage barrel 84. If it is necessary to clean the materials at the bottom of the collection pipe 5, close the first valve 86, and at the same time open the second valve 87 and the third valve 88. At this time, the high-pressure air flow output by the air source 2 into the main air pipe 81 passes through the branch pipe 85, the suction pipe 83 and the collection pipe 5 in sequence, and finally discharges from the bottom of the collection pipe 5, so as to blow away the materials;

[0048] By setting the air flow control assembly 8, it is beneficial to adjust and control the air flow output by the air source 2, so that positive air pressure and negative air pressure are generated at the bottom of the collection pipe 5, and then thrust and suction force are generated respectively, so as to clean the surplus materials and collect the sundries.

[0049] Embodiment 5. Refer to Figure 2 and Figure 8 . Different from the above embodiments, a vertically arranged baffle 9 is fixed on the surface of the conveyor 1. A gap is provided between the bottom edge of the baffle 9 and the surface of the conveyor 1. The baffle 9 is used to block the materials on the conveyor 1 that exceed the standard thickness. A cleaning component 10 is arranged on the baffle 9. The cleaning component 10 is used to clean the materials blocked in front of the baffle 9. The cleaning component 10 includes a screw 101 and a guide rod 102 that are distributed in parallel. A nut seat 103 is threadedly connected to the screw 101. The guide rod 102 penetrates through the nut seat 103 and is movably inserted into the nut seat 103. Both ends of the screw 101 are rotatably connected to the baffle 9. Both ends of the guide rod 102 are rotatably connected to the baffle 9. A base shaft 104 is rotatably connected to the nut seat 103. A plurality of fan blades 105 distributed in a circular array are fixed on one side of the base shaft 104 close to the baffle 9. A driven gear 106 is fixed on the other side of the base shaft 104 away from the baffle 9. A driven rack 107 is engaged with the top of the driven gear 106. Both ends of the driven rack 107 are fixed to the baffle 9. The cleaning component 10 further includes a transmission motor 108 fixed to the end of the baffle 9. The output shaft of the transmission motor 108 is fixed to the end of the screw 101.

[0050] Among them, the height of the gap matches the raw materials. If there is a situation of material accumulation on the conveyor 1, there may be a situation where sundries are covered by the materials during material accumulation, which affects the accuracy of monitoring. Then the materials with a height exceeding the height of the gap are partially blocked when passing through the baffle 9 until the materials at the bottom pass through the gap, making the materials more uniform, thereby reducing the monitoring error and improving the sorting efficiency. In actual application, the speed of some materials passing through the baffle 9 after accumulation is slow, and the feeding end of the conveyor 1 continuously transports materials to the baffle 9. Therefore, there is a hidden danger of continuous accumulation at the baffle 9. At this time, start the transmission motor 108. After the transmission motor 108 runs, it drives the screw 101 to rotate. When the screw 101 rotates, it drives the nut seat 103 to move. When the nut seat 103 moves, it drives the base shaft 104, the fan blades 105 and the driven gear 106 to move. When the driven gear 106 moves, it rolls along the driven rack 107. Furthermore, the base shaft 104 rotates while moving, so that the fan blades 105 rotate while moving. When the fan blades 105 move, they contact the accumulated material pile and push it to the side, so that the material pile is dispersed to other positions on the conveyor 1, and then the materials quickly pass through the gap;

[0051] By setting the baffle 9 and the cleaning component 10, the baffle 9 can block the material, thereby controlling the height of the material and preventing the piled-up material from affecting the subsequent visual monitoring accuracy. By setting the cleaning component 10, the fan blades 105 that roll along the baffle 9 can push the material piled up at the edge of the baffle 9, which can avoid the situation that the feeding efficiency is reduced due to the blockage of the material at the edge of the baffle 9.

[0052] Embodiment Six, a sorting method for health tea processing, which uses a multi-stage sorting device in the above embodiment for health tea processing.

[0053] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage sorting device, comprising a conveyor, a gas source, a camera and a movable arm installed above the conveyor, characterized in that: A collection pipe and a drive assembly are installed on the movable arm. The collection pipe is used for sorting sundries. The top of the collection pipe is closed and a fixator for fixing sundries is installed inside. An air flow control assembly is connected between the collection pipe and the air source. The drive assembly is in transmission connection with the fixator and the collection pipe. The drive assembly is used to drive the fixator and the collection pipe to move towards the surface of the conveyor respectively. The air flow control assembly is used to regulate the air flow output by the air source, forcing a positive air pressure or a negative air pressure to be generated at the end of the collection pipe. When the camera detects sundries, the movable arm controls the collection pipe and the fixator to move above the sundries. The drive assembly operates. First, it drives the fixator to move, forcing the fixator to press tightly on the sundries. Subsequently, the air flow control assembly operates, forcing a positive air pressure to be generated at the end of the collection pipe to blow away the materials around the sundries. After that, the drive assembly operates. While driving the fixator to disengage from the sundries, it also drives the collection pipe to move and sleeve over the sundries. Finally, the air flow control assembly operates again, forcing a negative air pressure to be generated at the end of the collection pipe to suck away the sundries.

2. The multi-stage sorting device according to claim 1, wherein: The collection pipe is movably inserted into the bottom end of the movable arm. The fixator includes a vertical shaft arranged in the collection pipe. The top end of the vertical shaft is movably inserted into the top wall of the collection pipe. A circular plate is fixed to the bottom end of the vertical shaft. An inner flexible insertion pin is fixed to the center of the bottom of the circular plate.

3. The multi-stage sorting device according to claim 2, characterized in that: A circular tube is arranged above the circular plate. The circular tube is sleeved outside the vertical shaft. A plurality of outer flexible insertion pins distributed in an annular array are fixed to the bottom of the circular tube. The outer flexible insertion pins are movably inserted into the circular plate. A return spring is also fixedly connected between the circular tube and the circular plate. A notch is formed in the side wall of the circular tube. One side inner wall of the notch is provided with a slope. An activity ring is also arranged above the circular tube. The activity ring is rotatably connected to the vertical shaft. A toothed ring is fixed to the top edge of the activity ring. A connecting rod is fixed to the bottom edge of the activity ring. The bottom end of the connecting rod is fixed with a drive shaft. The drive shaft extends into the notch. An adjustment motor is also fixed to the side wall of the vertical shaft. An adjustment gear is fixed to the output shaft of the adjustment motor. The adjustment gear meshes with the toothed ring.

4. The multi-stage sorting device according to claim 3, wherein: The drive assembly includes a main rack and a sub-rack slidably connected to the movable arm. The bottom end of the main rack is fixedly connected to the top end of the vertical shaft. The bottom end of the sub-rack is fixedly connected to the collection pipe. The drive assembly further includes a drive motor fixed to the movable arm. A drive gear is fixed to the output shaft of the drive motor. The drive gear meshes with both the main rack and the sub-rack simultaneously.

5. A multi-stage sorting device according to claim 1, characterized in that: The air flow control assembly includes a main air pipe. One end of the main air pipe is connected to the air source. The other end of the main air pipe is connected to a vacuum generator. A suction pipe is connected to the vacuum generator. One end of the suction pipe is connected to the collection pipe. A storage barrel is also fixedly installed in the middle of the suction pipe.

6. The multi-stage sorting device according to claim 5, wherein: A branch pipe is also fixedly connected to the main air pipe. One end of the branch pipe is connected to the suction pipe. A first valve is installed on the main air pipe. The first valve is located between the vacuum generator and the branch pipe. A second valve is installed at one end of the branch pipe close to the main air pipe. A third valve is installed at one end of the branch pipe close to the suction pipe.

7. A multi-stage sorting device according to claim 1, characterized in that: A vertical baffle is fixed on the surface of the conveyor, and a gap is provided between the bottom edge of the baffle and the surface of the conveyor. The baffle is used to block the materials on the conveyor that exceed the standard thickness.

8. A multi-stage sorting device according to claim 7, characterized in that: A cleaning assembly is provided on the baffle, and the cleaning assembly is used to clean the materials blocked in front of the baffle.

9. The multi-stage sorting device according to claim 8, characterized in that: The cleaning assembly includes a screw rod and a guide rod that are distributed in parallel. A nut seat is threadedly connected to the screw rod. The guide rod penetrates through the nut seat and is movably inserted into the nut seat. Both ends of the screw rod are rotatably connected to the baffle, and both ends of the guide rod are rotatably connected to the baffle. A base shaft is rotatably connected to the nut seat. A plurality of fan blades distributed in a circular array are fixed on one side of the base shaft close to the baffle. A driven gear is fixed on the other side of the base shaft away from the baffle. A driven rack is engaged with the top of the driven gear. Both ends of the driven rack are fixed to the baffle. The cleaning assembly further includes a transmission motor fixed to the end of the baffle, and the output shaft of the transmission motor is fixed to the end of the screw rod.

10. A sorting method for processing health care tea products, characterized in that: This sorting method for health tea processing uses a multi-stage sorting device as described in any one of claims 1-9.

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