A bud and leaf screening device for tea processing and its screening method

Abstract

The present invention discloses a bud and leaf screening device for tea processing and a screening method thereof, specifically relating to the technical field of tea screening devices. The present invention includes a frame body, on one side of the frame body, there is a screening cavity, between the frame body and the screening cavity, there is a spring, inside the spring, there is a limiting column, on one side of the frame body close to the screening cavity, there is a vibrating machine, on one side of the screening cavity, there is a feeding trough, on one side of the screening cavity close to the feeding trough, there is a motor, and the output end of the motor is fixedly connected with a gear. By setting a multi-stage screening device, the tea vibrates inside the screening cavity and is rotationally screened by the multi-stage screening device with multiple first sieves having different pore sizes. At the same time, when the multi-stage screening device screens the tea, it can reduce the situation that the tea gets stuck inside the first sieve and causes blockage of the holes, affecting the subsequent tea screening, and improves the screening efficiency of the tea.

Description

Technical Field

[0001] The present invention relates to the technical field of tea screening devices, and in particular to a bud and leaf screening device for tea processing and a screening method thereof. Background Art

[0002] Tea is a plant of the genus Camellia in the family Theaceae, distributed in mountainous areas of provinces south of the Yangtze River in China. Tea is divided into six categories according to the production process, such as green tea, white tea, black tea, etc. Tea leaves can be brewed with boiling water as a drink after processing. Tea leaves contain various beneficial components and have health care effects. And in the process of tea processing, tea leaf bud screening equipment is often needed to screen and classify the impurities and quality grades contained in tea leaves.

[0003] The inventor found that most of the existing tea leaf bud screening devices put tea leaves into the feed trough and enter the screening cavity, and then drive the screening cavity to shake through a vibrator so that the internal sieve mesh screens the tea leaves through horizontal shaking. However, when the sieve mesh screens tea leaves for a long time, some tea leaves may be blocked in the sieve mesh holes during the vibration of the sieve mesh, resulting in the sieve mesh being blocked and unable to screen the subsequent tea leaves. Summary of the Invention

[0004] The present invention proposes a bud and leaf screening device for tea processing and a screening method thereof to solve the problem that when the sieve mesh screens tea leaves for a long time, some tea leaves may be blocked in the sieve mesh holes during the vibration of the sieve mesh, resulting in the sieve mesh being blocked and unable to screen the subsequent tea leaves.

[0005] To achieve the above object, the present invention adopts the following technical scheme: A bud and leaf screening device for tea processing, including a frame body, a screening cavity is arranged on one side of the frame body, a spring is arranged between the frame body and the screening cavity, a limiting column is arranged inside the spring, a vibrator is arranged on the side of the frame body close to the screening cavity, a feed trough is arranged on one side of the screening cavity, a motor is arranged on the side of the screening cavity close to the feed trough, an output end of the motor is fixedly connected with a gear, a housing is arranged on the side of the screening cavity close to the motor, the motor is arranged inside the housing, a multi-stage screening device for preventing tea leaves from blocking the sieve mesh holes is arranged inside the screening cavity, a first collection trough is arranged on one side of the frame body, the interior of the first collection trough is divided into three small spaces, and a second collection trough is arranged on one side of the frame body.

[0006] The effects achieved by the above components are as follows: By setting up a multi-stage screening device, tea leaves enter the interior of the screening chamber from the feed trough. Under the telescopic action of the spring, the vibrating machine drives the screening chamber to vibrate, causing the tea leaves to vibrate inside the screening chamber and cooperating with the multi-stage screening device with multiple screens of different aperture sizes to conduct multi-stage screening on the tea leaves, enabling the tea leaves to enter the first collection trough for storage. At the same time, when the multi-stage screening device screens the tea leaves, the situation of tea leaves getting stuck in the screen and causing blockage can be reduced, improving the tea leaf screening efficiency.

[0007] Preferably, the multi-stage screening device includes three toothed plates. A slag filtering device is arranged between the three toothed plates and the screening chamber. A plurality of first screens are fixedly connected to the inner walls of the three toothed plates. The aperture sizes of the first screens on the three toothed plates are different. A plurality of first rectangular grooves are opened on one side of the three toothed plates. Second rectangular grooves are opened on one side of the three toothed plates close to the first rectangular grooves. A plurality of air cylinders are arranged inside the plurality of first rectangular grooves. Round rods are slidably connected to the inner walls of the plurality of air cylinders. Rectangular holes are opened on the inner walls of the plurality of first rectangular grooves. Concave rods are fixedly connected to the surfaces of the plurality of round rods. Grid plates are fixedly connected to one ends of the plurality of concave rods. A plurality of elastic sheets are fixedly connected to one side of the plurality of grid plates. The surfaces of the elastic sheets are in contact with the surfaces of the first screens. A plurality of third rectangular grooves are opened on one side of the three toothed plates away from the first rectangular grooves. The surfaces of the plurality of grid plates are slidably connected to the inner walls of the plurality of third rectangular grooves respectively. Three second screens with different aperture sizes are arranged on the surface of the screening chamber. The three second screens correspond to three small spaces inside the first collection trough respectively.

[0008] The effects achieved by the above components are as follows: By setting up a multi-stage screening device, the motor drives the gear to rotate, the gear drives the slag filtering device to rotate, the slag filtering device drives the three toothed plates to rotate, the three toothed plates drive the plurality of first screens with different aperture sizes to rotate inside the screening chamber. When the plurality of first screens conduct transmission screening on the tea leaves, the tea leaves pass through the three second screens with different aperture sizes and fall into three small spaces corresponding to their positions inside the first collection trough for classified storage. At the same time, during the process of the first screen screening the tea leaves, the air cylinder drives the round rod to perform telescopic movement, the round rod drives the concave rod to move left and right inside the rectangular hole, the concave rod drives the grid plate to move inside the third rectangular groove, and the grid plate drives the elastic sheet to move. When the grid plate drives the plurality of elastic sheets to move to the position corresponding to the holes on the first screen, the bent elastic sheets open and insert into the holes of the first screen to push out the tea leaves stuck in the holes of the first screen, reducing the situation that some tea leaves get stuck in the holes of the first screen during the long-term screening of the tea leaves by the first screen, which affects the subsequent screening of the tea leaves, and improving the screening efficiency of the tea leaves.

[0009] Preferably, two flow guiding plates are fixedly connected to one side of the screening chamber close to the second sieve mesh, and the two flow guiding plates respectively correspond to the two second sieve meshes on the left and right sides.

[0010] The effect achieved by the above components is that by arranging the flow guiding plates, the flow guiding plates can intercept the tea leaves screened out through the two second sieve meshes on the left and right sides, reducing the situation that the tea leaves screened out by the second sieve meshes on the left and right sides enter other small spaces inside the first collection tank and affecting the classified storage of tea leaves.

[0011] Preferably, rotating shafts are fixedly connected to the inner walls of multiple second rectangular grooves, rotating frames are fixedly connected to one ends of multiple round rods, first rotating rods are rotatably connected to one sides of multiple rotating frames, second rotating rods are rotatably connected to one sides of multiple first rotating rods, the inner walls of multiple second rotating rods are respectively rotatably connected to the surfaces of multiple rotating shafts, third rotating rods are rotatably connected between multiple first rotating rods and multiple second rotating rods, and spherical blocks are fixedly connected to one ends of multiple third rotating rods.

[0012] The effect achieved by the above components is that by arranging the spherical blocks, the air cylinder drives the round rod to push the first rotating rod to move left and right. Under the limiting effect of the rotating shaft on the second rotating rod, the first rotating rod cooperates with the second rotating scraping rod to squeeze the third rotating rod during the left and right movement, so that the third rotating rod is extruded out of the second rectangular groove and moves upward, driving the spherical block to move up and down to disperse the tea leaves piled up on the first sieve mesh, reducing the situation that the excessive accumulation of tea leaves affects the screening of tea leaves.

[0013] Preferably, push rods are fixedly connected to the surfaces of multiple spherical blocks, and the longitudinal section of the push rod is triangular.

[0014] The effect achieved by the above components is that by arranging the push rods, the push rods can increase the dispersion range of the spherical blocks on the tea leaves. Under the action of the relatively sharp surface of the push rod, the drag rod can disperse the tea leaves bonded together, improving the efficiency of the spherical block in pushing and dispersing the tea leaves.

[0015] Preferably, positioning rods are fixedly connected to one sides of multiple grid plates, positioning grooves are formed in the inner walls of multiple third rectangular grooves, and the surfaces of multiple positioning rods are respectively slidably connected to the inner walls of multiple positioning grooves.

[0016] The effect achieved by the above components is that by arranging the positioning rods and the positioning grooves, when the grid plate moves inside the third rectangular groove, it can drive the positioning rod to move, and the positioning rod can move inside the positioning groove to assist in limiting the grid plate, reducing the situation that the grid plate shakes during the movement and improving the use stability of the grid plate.

[0017] Preferably, the residue filtering device includes a circular tube, the surface of the circular tube is rotatably connected to the inner wall of the screening chamber, all three toothed plates are fixedly connected to the circular tube, one end of the circular tube is fixedly connected to a toothed ring, the toothed ring is arranged inside the housing, one end of the feed trough is rotatably connected to the surface of the toothed ring, the toothed ring meshes with the gear at the output end of the motor, the end of the circular tube away from the toothed ring is fixedly connected to a bent pipe, one end of the bent pipe is fixedly connected to a conical screen, the surface of the circular tube is provided with leakage holes, the inner wall of the leakage holes is provided with grooves, the inner wall of the grooves is fixedly connected to an electric telescopic rod, and one end of the electric telescopic rod is fixedly connected to a sluice gate, the surface of the sluice gate is slidably inserted into the inner wall of the leakage holes.

[0018] The effects achieved by the above components are as follows: By setting the residue filtering device, tea leaves enter the inside of the circular tube through the feed trough, and then enter the inside of the bent pipe and the conical screen through the circular tube. The impurities mixed in the tea leaves are screened out through the conical screen and fall into the second collection trough for storage. At this time, the motor drives the toothed ring to rotate through the gear, causing the toothed ring to drive the circular tube to rotate inside the screening chamber, and the round rod drives the bent pipe and the conical screen to rotate. Under the action of the bent pipe, when the bent pipe drives the conical screen to the position where the tip is upward, the tea leaves inside the conical screen flow back into the circular tube through the bent pipe. After the tea leaves flow back and forth multiple times, the electric telescopic rod drives the sluice gate into the groove, enabling the tea leaves to enter the screening chamber through the leakage holes and be multi-stage screened by the multi-stage screening device, reducing the situation where a large amount of impurities in the tea leaves affect the quality of the tea after screening, and improving the screening effect of the tea leaves.

[0019] Preferably, a rubber tube is fixedly connected to the side of the bent pipe close to the conical screen, the rubber tube is fixedly connected to the conical screen, one end of the conical screen is fixedly connected to a first magnet, an L-shaped rod is fixedly connected to one side of the second collection trough, two second magnets are symmetrically and fixedly connected to one side of the L-shaped rod, a third magnet is fixedly connected to the middle position of the L-shaped rod close to the two second magnets, and both of the two second magnets are magnetically attracted to the first magnet, and the third magnet is magnetically repulsive to the first magnet.

[0020] The effects achieved by the above components are as follows: By setting the rubber tube, the conical screen can drive the first magnet to rotate to the position where it is magnetically attracted to the two second magnets respectively, so as to guide the tea leaves into and out of the conical screen. During the rotation of the conical screen, the first magnet is magnetically repulsive to the third magnet, enabling the conical screen to swing under the action of the rubber tube. Under the action of the swinging force, the conical screen can scatter the tea leaves inside and discharge the impurities mixed inside, improving the screening efficiency of the conical screen for the tea leaves.

[0021] Preferably, the rubber tube has flexibility and can be freely bent.

[0022] The effects achieved by the above components are as follows: By setting the rubber tube, the rubber tube can be freely bent to rotate and swing following the conical screen, and the swinging efficiency of the conical screen is improved.

[0023] Preferably, a tea screening method is characterized in that: the screening method for any one of the screening devices in the claims includes the following steps:

[0024] S1. First, put the tea into the feeding trough so that the tea enters the slag filtering device. Driven by the motor, the slag filtering device rotates inside the screening cavity, causing the tea to tumble inside the slag filtering device and filtering out the impurities contained in the tea, which are stored in the second collection tank.

[0025] S2. When the tea is discharged from the slag filtering device after removing impurities and enters the screening cavity through the leakage holes, at this time, the vibrating machine drives the screening cavity to vibrate under the action of the spring. At the same time, the slag filtering device drives the multi-stage screening device to rotate inside the screening cavity, so that the multi-stage screening device rotates and cooperates with the vibration of the screening cavity to screen the tea entering the screening cavity multiple times, so that the tea is divided into multiple different standards and discharged by multiple second filter meshes and stored separately by the first collection tank. At this time, the screening of the tea is completed. At the same time, during the screening of the tea, the multi-stage screening device can reduce the situation of the tea blocking the first screen.

[0026] In summary, the beneficial effects of the present invention are as follows:

[0027] For the bud leaf screening device and its screening method for tea processing of the present invention, by setting a multi-stage screening device, the tea vibrates inside the screening cavity and cooperates with the multi-stage screening device with multiple first screen meshes of different pore sizes to rotate and screen the tea. At the same time, when the multi-stage screening device screens the tea, it can reduce the situation that the tea gets stuck inside the first screen mesh and causes the hole to be blocked, affecting the subsequent tea screening, and improves the screening efficiency of the tea.

[0028] By setting a slag filtering device, the slag filtering device can preferentially remove impurities from the tea, so that the tea after impurity removal enters the screening cavity and is screened by the multi-stage screening device, reducing the situation that the tea contains more impurities after screening due to more impurities doped in the tea, affecting the quality of the tea, and improving the screening effect of the tea. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional schematic diagram of the present invention;

[0030] Figure 2 is a partial cross-sectional view of the present invention;

[0031] Figure 3 is a partial cross-sectional view of the screening cavity of the present invention;

[0032] Figure 4It is a schematic three-dimensional structure diagram of the tooth plate of the present invention;

[0033] Figure 5 It is a rear view of the tooth plate of the present invention;

[0034] Figure 6 It is a partial cross-sectional view of the tooth plate of the present invention;

[0035] Figure 7 It is a schematic three-dimensional structure diagram of the elastic sheet of the present invention;

[0036] Figure 8 It is a schematic three-dimensional structure diagram of the second sieve of the present invention;

[0037] Figure 9 It is a schematic three-dimensional structure diagram of the second magnet of the present invention;

[0038] Figure 10 It is a partial cross-sectional view of the round tube of the present invention. Embodiment

[0039] Please refer to Figures 1-8 As shown in the figure, the present invention provides a bud and leaf screening device for tea processing, including a frame body 1. A screening cavity 2 is arranged on one side of the frame body 1. A spring 3 is arranged between the frame body 1 and the screening cavity 2. A limiting column is arranged inside the spring 3. A vibrating machine 4 is arranged on the side of the frame body 1 close to the screening cavity 2. A feeding groove 5 is arranged on one side of the screening cavity 2. A motor 6 is arranged on the side of the screening cavity 2 close to the feeding groove 5. The output end of the motor 6 is fixedly connected with a gear. A housing 7 is arranged on the side of the screening cavity 2 close to the motor 6. The motor 6 is arranged inside the housing 7. A multi-stage screening device 8 for preventing tea from blocking the holes of the sieve is arranged inside the screening cavity 2. A first collection tank 10 is arranged on one side of the frame body 1. The interior of the first collection tank 10 is divided into three small spaces. A second collection tank 11 is arranged on one side of the frame body 1. By arranging the multi-stage screening device 8, tea enters the interior of the screening cavity 2 from the feeding groove 5. Under the telescopic action of the spring 3, the vibrating machine 4 drives the screening cavity 2 to vibrate, so that the tea vibrates inside the screening cavity 2 and cooperates with the multi-stage screening device 8 with sieves of multiple different pore sizes to perform multi-stage screening on the tea, so that the tea enters the interior of the first collection tank 10 for storage. At the same time, when the multi-stage screening device 8 screens the tea, the situation that the tea gets stuck inside the sieve and causes blockage can be reduced, and the tea screening efficiency is improved.

[0040] Please refer to Figures 3-8, the present invention discloses that the multi-stage screening device 8 includes three toothed plates 81. A slag filtering device 9 is arranged between the three toothed plates 81 and the screening chamber 2. A plurality of first sieves 83 are fixedly connected to the inner walls of the three toothed plates 81. The pore sizes of the first sieves 83 on the three toothed plates 81 are different. A plurality of first rectangular grooves 82 are formed on one side of the three toothed plates 81. A second rectangular groove 84 is formed on one side of the three toothed plates 81 close to the first rectangular groove 82. A cylinder 85 is arranged inside each of the plurality of first rectangular grooves 82. A round rod 86 is slidably connected to the inner wall of each of the plurality of cylinders 85. A rectangular hole 817 is formed on the inner wall of each of the plurality of first rectangular grooves 82. A concave rod 818 is fixedly connected to the surface of each of the plurality of round rods 86. A grid plate 815 is fixedly connected to one end of each of the plurality of concave rods 818. A plurality of elastic sheets 816 are fixedly connected to one side of each of the plurality of grid plates 815. The surface of the elastic sheet 816 abuts against the surface of the first sieve 83. A plurality of third rectangular grooves 814 are formed on the side of the three toothed plates 81 away from the first rectangular groove 82. The surface of each of the plurality of grid plates 815 is slidably connected to the inner wall of each of the plurality of third rectangular grooves 814. Three second sieves 821 with different pore sizes are arranged on the surface of the screening chamber 2. The three second sieves 821 respectively correspond to the positions of three small spaces inside the first collection tank 10. By setting the multi-stage screening device 8, the motor 6 drives the gear to rotate, the gear drives the slag filtering device 9 to rotate, the slag filtering device 9 drives the three toothed plates 81 to rotate, the three toothed plates 81 drive the plurality of first sieves 83 with different pore sizes to rotate inside the screening chamber 2. When the plurality of first sieves 83 perform transmission screening on the tea leaves, the tea leaves fall into the three small spaces corresponding to the positions inside the first collection tank 10 through the three second sieves 821 with different pore sizes for classified storage. At the same time, during the screening process of the tea leaves by the first sieve 83, the cylinder 85 drives the round rod 86 to perform telescopic movement, so that the round rod 86 drives the concave rod 818 to move left and right inside the rectangular hole 817, the concave rod 818 drives the grid plate 815 to move inside the third rectangular groove 814, and the grid plate 815 drives the elastic sheet 816 to move. When the grid plate 815 drives the plurality of elastic sheets 816 to move to the position corresponding to the holes on the first sieve 83, the bent elastic sheets 816 open and are inserted into the holes of the first sieve 83 to push out the tea leaves stuck in the holes of the first sieve 83, reducing the situation that some tea leaves are stuck in the holes of the first sieve 83 during the long-term screening of tea leaves by the first sieve 83, which affects the subsequent screening of tea leaves, and improving the screening efficiency of tea leaves.

[0041] Please refer to Figures 3-8, the present invention discloses that two flow guiding plates 822 are fixedly connected to one side of the screening chamber 2 close to the second screen 821. The two flow guiding plates 822 correspond to the two second screens 821 on the left and right sides respectively. By setting the flow guiding plates 822, the flow guiding plates 822 can intercept the tea leaves screened through the two second screens 821 on the left and right sides, reducing the situation that the tea leaves screened by the second screens 821 on the left and right sides enter other small spaces inside the first collection tank 10 and affecting the classified storage of tea leaves. The inner walls of multiple second rectangular grooves 84 are all fixedly connected with rotating shafts 810. One ends of multiple round rods 86 are all fixedly connected with rotating frames 87. One sides of multiple rotating frames 87 are all rotatably connected with first rotating rods 88. One sides of multiple first rotating rods 88 are all rotatably connected with second rotating rods 89. The inner walls of multiple second rotating rods 89 are respectively rotatably connected with the surfaces of multiple rotating shafts 810. Third rotating rods 811 are rotatably connected between multiple first rotating rods 88 and multiple second rotating rods 89. One ends of multiple third rotating rods 811 are all fixedly connected with spherical blocks 812. By setting the spherical blocks 812, the air cylinder 85 drives the round rod 86 to push the first rotating rod 88 to move left and right. Under the limiting action of the rotating shaft 810 on the second rotating rod 89, the first rotating rod 88 cooperates with the second rotating scraping rod to squeeze the third rotating rod 811 during the left and right movement, so that the third rotating rod 811 is extruded out of the second rectangular groove 84 and moves upward, making the third rotating rod 811 drive the spherical block 812 to move up and down to disperse the tea leaves piled up on the first screen 83, reducing the situation that the excessive accumulation of tea leaves affects the screening of tea leaves.

[0042] Please refer to Figures 3-8 , the present invention discloses that push rods 813 are fixedly connected to the surfaces of multiple spherical blocks 812. The longitudinal section of the push rod 813 is triangular. By setting the push rods 813, the push rods 813 can increase the dispersion range of the spherical blocks 812 on the tea leaves. Under the action of the relatively sharp surface of the push rod 813, the drag rod can disperse the tea leaves bonded together, improving the efficiency of the spherical block 812 in pushing and dispersing the tea leaves. Positioning rods 819 are fixedly connected to one side of multiple grid plates 815. Positioning grooves 820 are opened on the inner walls of multiple third rectangular grooves 814. The surfaces of multiple positioning rods 819 are respectively slidably connected with the inner walls of multiple positioning grooves 820. By setting the positioning rods 819 and the positioning grooves 820, when the grid plate 815 moves inside the third rectangular groove 814, it can drive the positioning rod 819 to move, so that the positioning rod 819 can move inside the positioning groove 820 to assist in limiting the grid plate 815, reducing the situation that the grid plate 815 shakes during the movement and improving the use stability of the grid plate 815.

[0043] Please refer to Figures 9-10, the present invention discloses a filter residue device 9, which includes a circular tube 91. The surface of the circular tube 91 is rotatably connected to the inner wall of the screening chamber 2. All three toothed plates 81 are fixedly connected to the circular tube 91. One end of the circular tube 91 is fixedly connected to a toothed ring 92. The toothed ring 92 is arranged inside the housing 7. One end of the feed chute 5 is rotatably connected to the surface of the toothed ring 92. The toothed ring 92 is meshed with the gear at the output end of the motor 6. The end of the circular tube 91 away from the toothed ring 92 is fixedly connected to an elbow 93. One end of the elbow 93 is fixedly connected to a conical screen 95. The surface of the circular tube 91 is provided with leakage holes 97. The inner wall of the leakage hole 97 is provided with a groove 98. The inner wall of the groove 98 is fixedly connected to an electric telescopic rod 99. One end of the electric telescopic rod 99 is fixedly connected to a gate plate 910. The surface of the gate plate 910 is slidably inserted into the inner wall of the leakage hole 97. By setting the filter residue device 9, tea enters the inside of the circular tube 91 through the feed chute 5, and the tea enters the inside of the elbow 93 and the conical screen 95 through the circular tube 91. The impurities doped in the tea are screened out through the conical screen 95 and fall into the second collection tank 11 for storage. At this time, the motor 6 drives the toothed ring 92 to rotate through the gear, so that the toothed ring 92 drives the circular tube 91 to rotate inside the screening chamber 2, and the round rod 86 drives the elbow 93 and the conical screen 95 to rotate. Under the action of the elbow 93, when the elbow 93 drives the conical screen 95 to the position where the tip is upward, the tea inside the conical screen 95 flows back into the circular tube 91 through the elbow 93. When the tea flows back and forth multiple times, the electric telescopic rod 99 drives the gate plate 910 into the groove 98, so that the tea enters the screening chamber 2 through the leakage holes 97 and is multi-stage screened by the multi-stage screening device 8, reducing the situation that the tea contains more impurities after screening due to more impurities doped in the tea, which affects the quality of the tea, and improving the screening effect of the tea.

[0044] Please refer to Figures 9-10, the present invention discloses that a rubber tube 94 is fixedly connected to one side of the elbow pipe 93 close to the conical screen 95. The rubber tube 94 is fixedly connected to the conical screen 95. One end of the conical screen 95 is fixedly connected to a first magnet 96. An L-shaped rod 911 is fixedly connected to one side of the second collection tank 11. Two second magnets 912 are symmetrically and fixedly connected to one side of the L-shaped rod 911. A third magnet 913 is fixedly connected to the middle position of the L-shaped rod 911 close to the two second magnets 912. Both of the two second magnets 912 are magnetically attracted to the first magnet 96, and the third magnet 913 is magnetically repelled by the first magnet 96. By providing the rubber tube 94, the conical screen 95 can drive the first magnet 96 to rotate to the positions magnetically attracted to the two second magnets 912 respectively, so that the conical screen 95 can import and export tea leaves. During the rotation of the conical screen 95, the first magnet 96 is repelled by the third magnet 913, so that the conical screen 95 can be swung under the action of the rubber tube 94. The tea leaves inside can be scattered and the impurities doped inside can be discharged under the action of the swinging force, improving the screening efficiency of the conical screen 95 for tea leaves. The rubber tube 94 has flexibility and can be freely bent. By providing the rubber tube 94, the rubber tube 94 can be freely bent to rotate and swing following the conical screen 95, and the swinging efficiency of the conical screen 95 is improved.

[0045] The working principle is as follows: First, turn on the vibrator 4 and the motor 6, so that the vibrator 4 drives the screening chamber 2 to vibrate up and down under the action of the spring 3, so that the motor 6 drives the gear ring 92 to rotate, so that the gear ring 92 drives the round tube 91 to rotate inside the screening chamber 2, so that the round rod 86 drives the elbow tube 93, the rubber tube 94 and the conical screen 95 to rotate, so that the conical screen 95 drives the first magnet 96 to rotate. At this time, the tea leaves are put into the feeding trough 5, so that the tea leaves enter the round tube 91 and are guided into the conical screen 95 by the elbow tube 93. When the first magnet 96 rotates to the positions where it attracts the two second magnets 912 respectively, the conical screen 95 guides and discharges the tea leaves. During the rotation of the conical screen 95, the first magnet 96 repels the third magnet 913, so that the conical screen 95 can swing under the action of the rubber tube 94, so that the conical screen 95 swings to disperse the tea leaves inside and filter out the impurities, so that the impurities enter the second collection trough 11 for storage, completing the impurity removal of the tea leaves. When the conical screen 95 rotates to the position where the first magnet 96 attracts the upper second magnet 912, the tip of the conical screen 95 faces upward, so that the tea leaves inside the conical screen 95 flow back into the round tube 91 through the elbow tube 93. After the tea leaves flow back and forth many times, the electric telescopic rod 99 drives the gate plate 910 into the groove 98, so that the tea leaves enter the screening chamber 2 through the leakage holes 97. At this time, the round tube 91 drives the three toothed plates 81 to rotate, so that the three toothed plates 81 drive the multiple first screens 83 with different aperture sizes to rotate inside the screening chamber 2. When the multiple first screens 83 drive and screen the tea leaves, the tea leaves fall into the three small spaces corresponding to the positions inside the first collection trough 10 through the three second screens 821 with different aperture sizes for classified storage, completing the multi-stage screening of the tea leaves. At the same time, during the screening of the tea leaves by the first screen 83, the air cylinder 85 drives the round rod 86 to move telescopically, so that the round rod 86 drives the concave rod 818 to move left and right inside the rectangular hole 817, so that the concave rod 818 drives the grid plate 815 to move inside the third rectangular groove 814, so that the grid plate 815 drives the elastic sheet 816 to move. When the grid plate 815 drives the multiple elastic sheets 816 to move to the positions corresponding to the holes on the first screen 83, the bent elastic sheets 816 open and insert into the holes of the first screen 83 to push out the tea leaves stuck in the holes of the first screen 83, completing the anti-blocking of the first screen 83. At the same time, the round rod 86 pushes the first rotating rod 88 to move left and right. Under the limiting action of the rotating shaft 810 on the second rotating rod 89, when the first rotating rod 88 moves left and right, it cooperates with the second rotating scraper to squeeze the third rotating rod 811, so that the third rotating rod 811 is extruded out of the second rectangular groove 84 and moves upward, so that the third rotating rod 811 drives the spherical block 812 and the push rod 813 to move up and down to disperse the tea leaves piled up on the first screen 83, completing the anti-piling effect of the tea leaves.

Claims

1. A bud and leaf screening device for tea processing, comprising a frame body (1), characterized in that: On one side of the frame body (1), a screening chamber (2) is provided. A spring (3) is arranged between the frame body (1) and the screening chamber (2). A limiting column is arranged inside the spring (3). A vibrating machine (4) is arranged on the side of the frame body (1) close to the screening chamber (2). A feeding trough (5) is arranged on one side of the screening chamber (2). A motor (6) is arranged on the side of the screening chamber (2) close to the feeding trough (5). The output end of the motor (6) is fixedly connected with a gear. A housing (7) is arranged on the side of the screening chamber (2) close to the motor (6). The motor (6) is arranged inside the housing (7). A multi-stage screening device (8) for preventing tea from blocking the holes of the screen is arranged inside the screening chamber (2). A first collection trough (10) is arranged on one side of the frame body (1). The interior of the first collection trough (10) is divided into three small spaces. A second collection trough (11) is arranged on one side of the frame body (1). The multi-stage screening device (8) includes three toothed plates (81). A slag filtering device (9) is arranged between the three toothed plates (81) and the screening chamber (2). A plurality of first screens (83) are fixedly connected to the inner walls of the three toothed plates (81). The pore sizes of the first screens (83) on the three toothed plates (81) are different. A plurality of first rectangular grooves (82) are formed on one side of the three toothed plates (81). A plurality of second rectangular grooves (84) are formed on the side of the three toothed plates (81) close to the first rectangular grooves (82). A cylinder (85) is arranged inside each of the plurality of first rectangular grooves (82). A round rod (86) is slidably connected to the inner wall of each of the plurality of cylinders (85). A rectangular hole (817) is formed on the inner wall of each of the plurality of first rectangular grooves (82). A concave rod (818) is fixedly connected to the surface of each of the plurality of round rods (86). A grid plate (815) is fixedly connected to one end of each of the plurality of concave rods (818). A plurality of elastic sheets (816) are fixedly connected to one side of each of the plurality of grid plates (815). The surface of the elastic sheet (816) abuts against the surface of the first screen (83). A plurality of third rectangular grooves (814) are formed on the side of the three toothed plates (81) away from the first rectangular grooves (82). The surfaces of the plurality of grid plates (815) are respectively slidably connected to the inner walls of the plurality of third rectangular grooves (814). Three second screens (821) with different pore sizes are arranged on the surface of the screening chamber (2). The three second screens (821) respectively correspond to the three small spaces inside the first collection trough (10);The filter residue device (9) includes a circular tube (91), the surface of the circular tube (91) is rotatably connected to the inner wall of the screening chamber (2), all three toothed plates (81) are fixedly connected to the circular tube (91), one end of the circular tube (91) is fixedly connected to a toothed ring (92), the toothed ring (92) is arranged inside the housing (7), one end of the feed chute (5) is rotatably connected to the surface of the toothed ring (92), the toothed ring (92) is meshed with the gear at the output end of the motor (6), the end of the circular tube (91) away from the toothed ring (92) is fixedly connected to an elbow pipe (93), one end of the elbow pipe (93) is fixedly connected to a conical screen (95), the surface of the circular tube (91) is provided with leakage holes (97), the inner wall of the leakage holes (97) is provided with grooves (98), the inner wall of the grooves (98) is fixedly connected to an electric telescopic rod (99), one end of the electric telescopic rod (99) is fixedly connected to a gate plate (910), the surface of the gate plate (910) is slidably inserted into the inner wall of the leakage holes (97); one side of the elbow pipe (93) close to the conical screen (95) is fixedly connected to a rubber pipe (94), the rubber pipe (94) is fixedly connected to the conical screen (95), one end of the conical screen (95) is fixedly connected to a first magnet (96), one side of the second collection tank (11) is fixedly connected to an L-shaped rod (911), two second magnets (912) are symmetrically and fixedly connected to one side of the L-shaped rod (911), a third magnet (913) is fixedly connected to the middle position of the L-shaped rod (911) close to the two second magnets (912), both of the two second magnets (912) are magnetically attracted to the first magnet (96), and the third magnet (913) is magnetically repelled by the first magnet (96).; 2. The bud and leaf screening device for tea processing according to claim 1, characterized in that: On one side of the screening chamber (2) close to the second sieve (821), two flow guiding plates (822) are fixedly connected, and the two flow guiding plates (822) correspond to the two second sieves (821) on the left and right sides respectively.

3. The bud and leaf screening device for tea processing according to claim 2, wherein: The inner walls of a plurality of the second rectangular grooves (84) are fixedly connected with rotating shafts (810). One ends of a plurality of the round rods (86) are fixedly connected with rotating frames (87). One sides of a plurality of the rotating frames (87) are rotatably connected with first rotating rods (88). One sides of a plurality of the first rotating rods (88) are rotatably connected with second rotating rods (89). The inner walls of a plurality of the second rotating rods (89) are rotatably connected with the surfaces of a plurality of the rotating shafts (810) respectively. A third rotating rod (811) is rotatably connected between a plurality of the first rotating rods (88) and a plurality of the second rotating rods (89). One ends of a plurality of the third rotating rods (811) are fixedly connected with spherical blocks (812).

4. The leaf bud screening device for tea processing according to claim 3, wherein: Push rods (813) are fixedly connected to the surfaces of a plurality of the spherical blocks (812), and the longitudinal section of the push rod (813) is triangular.

5. The bud and leaf screening device for tea processing according to claim 4, wherein: Positioning rods (819) are fixedly connected to one sides of a plurality of the grid plates (815). Positioning grooves (820) are formed in the inner walls of a plurality of the third rectangular grooves (814). The surfaces of a plurality of the positioning rods (819) are slidably connected with the inner walls of a plurality of the positioning grooves (820) respectively.

6. The bud and leaf screening device for tea processing according to claim 5, wherein: The rubber tube (94) is flexible and can be bent freely.

7. A method for screening tea leaves, characterized in that: A screening method for the screening device according to claim 6, comprising the following steps: S1. First, put the tea leaves into the feed hopper (5) so that the tea leaves enter the residue filtering device (9). Driven by the motor (6), the residue filtering device (9) rotates inside the screening chamber (2), so that the tea leaves tumble inside the residue filtering device (9) and the impurities contained in the tea leaves are filtered out and stored by the second collection tank (11). S2. When the tea leaves are discharged from the residue filtering device (9) and enter the screening chamber (2) through the leakage holes (97), at this time, the vibrating machine (4) drives the screening chamber (2) to vibrate under the action of the spring (3). At the same time, the residue filtering device (9) drives the multi-stage screening device (8) to rotate inside the screening chamber (2), so that the multi-stage screening device rotates and cooperates with the vibration of the screening chamber (2) to screen the tea leaves entering the screening chamber (2) for many times, so that the tea leaves are divided into multiple different standards and discharged by a plurality of second filter meshes and stored in categories by the first collection tank (10). At this time, the screening of the tea leaves is completed. At the same time, during the screening of the tea leaves, the multi-stage screening device (8) can reduce the situation of tea leaves blocking the first sieve (83).

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