Tea conveying and screening all-in-one machine with impurity separation function

Abstract

The application discloses a tea conveying and screening integrated machine with impurity separation function, and relates to the field of conveying and screening. The machine comprises a base, frame plates are fixed on the top of the base, a feeding box is installed on one side of the top of the two frame plates, an inclined screen is arranged below the discharge end of a first conveying belt between the two frame plates, a light impurity separation assembly is arranged above the screen, and the light impurity separation assembly is used for sucking and collecting light impurities such as fannings and dust generated in the vibration process of tea leaves. A slow baking oven is arranged outside a second conveying belt, the slow baking oven is fixedly connected with the frame plates, a permanent magnet eddy current hot air generating assembly is arranged beside the second conveying belt, the permanent magnet eddy current hot air generating assembly obtains transmission power by using the running power of the second conveying belt, and hot air is generated to implement slow baking on the tea leaves conveyed on the second conveying belt. The application realizes suction filtration of light impurities of tea leaves, recycles purified air as a hot air source, effectively improves screening precision, reduces energy consumption, and retains the original flavor and quality of tea leaves.

Description

Technical Field

[0001] This invention mainly relates to the technical field of screening and conveying, specifically a tea conveying and screening integrated machine with impurity separation function. Background Technology

[0002] In the tea production and processing process, after the fresh leaves are picked, they need to be preliminarily screened and impurities removed before being transported to the next processing stage. Currently, the tea screening and conveying operations commonly used in the industry are mostly carried out separately. That is, the tea stems, sand, branches and leaves are removed from the tea leaves by screening devices first, and then the tea leaves that have completed the preliminary impurity removal are transferred to the next processing station by conveying devices.

[0003] A tea sorting device for tea cultivation described in the prior art (publication number CN119387159A) includes a frame, a feeding part fixed to the upper end of the frame, a sieving assembly inserted inside the frame, and a storage oven located on one side of the sieving assembly for storing sieving tea leaves and drying the tea leaves. The frame is connected to a softening and anti-breakage treatment part, which includes a conveyor belt 1 and a conveyor belt 2 rotatably connected inside the frame and an inclined plate 1 located between the conveyor belt 1 and the conveyor belt 2.

[0004] While the aforementioned technology can achieve softening pretreatment of tea leaves through softening and anti-breakage treatment, reducing breakage caused by vibration or collision during screening, the use of atomization humidification at the front end of the screening process significantly increases the viscosity of the moistened tea leaves, which easily causes clogging of the screen mesh. Light impurities absorb moisture and increase in weight, making them difficult to be effectively separated by the air separation system, resulting in a significant decrease in screening efficiency. Furthermore, the tea leaves are first atomized and humidified, and then dried in a separate oven, requiring a separate power supply for the drying equipment. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide an integrated tea conveying and screening machine with impurity separation function to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A tea conveying and screening integrated machine with impurity separation function includes a base, with frame plates fixed on both sides of the top of the base. A feed box is installed on one side of the top of the two frame plates. A first conveyor belt is arranged in the feed box. An inclined screen is arranged between the two frame plates below the discharge end of the first conveyor belt. The screen is equipped with a vibration exciter. A light impurity separation component is arranged above the screen. The light impurity separation component is used to absorb and collect light impurities such as tea hairs and dust generated during the vibration of the tea leaves. Below the screen is a retractable collection box. A guide plate is provided on the low-end discharge side of the screen. A second conveyor belt is arranged below the guide plate. A slow drying box is provided outside the second conveyor belt. The slow drying box is fixedly connected to the frame plate. A permanent magnet eddy current hot air generator is provided next to the second conveyor belt. The permanent magnet eddy current hot air generator uses the rotation power of the second conveyor belt to obtain transmission power and generates hot air to slowly dry the tea leaves conveyed on the second conveyor belt.

[0007] Specifically, the light impurity separation component includes a negative pressure hood, which is positioned above a screen. Multiple negative pressure suction chambers are formed within the negative pressure hood by partitions. Multiple negative pressure pipes are connected to the top of the negative pressure hood at each of the suction chambers. A dust collection box is fixed to the outer wall of a frame plate by screws. Multiple suction pumps are installed at the top of the dust collection box. The suction ports of the multiple suction pumps are connected to a main pipe, and the lower walls of the main pipes are connected to the corresponding multiple negative pressure pipes.

[0008] Specifically, the dust collection box is equipped with two layers of filters, and an exhaust port is provided at the bottom of the dust collection box. The bottom of the dust collection box and the bottom of the side wall are connected by air supply pipes. Each air supply pipe is connected to a copper pipe installed in the permanent magnet eddy current hot air generator assembly, which is used to send part of the air purified by the filters into the copper pipe.

[0009] Specifically, the permanent magnet eddy current hot air generating assembly includes a transmission mechanism and multiple turntables. Each copper tube is arranged on one side of the corresponding turntable. Several strong magnets are embedded in the outer ring of the side of the multiple turntables facing the copper tubes, and the positive and negative poles of two adjacent strong magnets are opposite.

[0010] Specifically, the transmission mechanism includes multiple rotating shafts. One end of a conveying roller in the second conveyor belt extends to the outside through a frame plate. A large sprocket is fixedly installed on the shaft end of the conveying roller. The ends of the multiple rotating shafts are rotatably connected to the inner side wall of the slow drying oven. The multiple rotating shafts are arranged in the area below the second conveyor belt, and the other end of the multiple rotating shafts extends to the outside through a frame plate.

[0011] Specifically, in this technical solution, the large sprocket is connected to a small sprocket via a first chain drive. The small sprocket is fixedly installed at the end of a rotating shaft. Multiple rotating shafts are each fixedly installed with a transmission sprocket at their external ends. The multiple transmission sprockets are connected to each other via a second chain drive. Multiple turntables are each fixedly installed on the shaft end of their corresponding rotating shafts.

[0012] Specifically, in this technical solution, the outlet ends of the multiple copper pipes are inserted into the slow-drying oven and connected to an exhaust pipe. The lower surface of the multiple exhaust pipes is connected to several outlet pipes. The ends of the multiple exhaust pipes are fixedly connected to the inner side wall of the slow-drying oven. The inlet ends of the multiple copper pipes are inserted into the top wall of the slow-drying oven and connected to the corresponding gas supply pipes.

[0013] Specifically, in this technical solution, the bottom end of the collection box slides in contact with the top end of the slow drying oven, and the end face of the collection box is provided with a push-pull handle.

[0014] Specifically, in this technical solution, the screen is installed on the mounting frame, the two outer walls of the mounting frame are fixed to two frame plates with bolts, and the vibration exciter is fixedly assembled on the lower surface of the mounting frame.

[0015] Specifically, in this technical solution, the base is located below the unloading end of the second conveyor belt and has a push-pull opening for placing the collection box.

[0016] In summary, the present invention has the following main beneficial effects: During the tea screening stage, a vibrator vibrates the screen back and forth, creating a suspended, fluidized layer that thoroughly breaks up clumps of tea. Particles smaller than the screen openings, such as stones, sand, and hard debris, are thrown up and fall back onto the screen surface. Due to gravity, they penetrate the screen openings and fall into the collection box below, achieving the separation of heavy impurities. Combined with a negative pressure suction component for separating light impurities, when the tea leaves are vibrated above the screen surface and are in a brief state of "weightlessness" suspension, the light impurities are suctioned out. This avoids the problem of increased viscosity after the tea leaves are humidified, which can clog the screen openings, and the problem of light impurities absorbing moisture and becoming heavier, making them difficult to separate. This ensures screening efficiency. Part of the air purified by the dust collection box is recycled and transported into the copper pipe as a hot air medium, realizing the recycling of the screening and dust removal airflow without the need to continuously draw in outside cold air for heating. At the same time, the power generated by the second conveyor belt drives the permanent magnet eddy current hot air generator to operate, using the permanent magnet eddy current effect to heat the air flowing through the copper pipe. The heated air is sent into the slow drying chamber to slowly dry the tea leaves. There is no need to configure an independent power supply for the slow drying, further reducing the overall energy consumption of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the orthogonal isometric structure of the device of the present invention; Figure 2 This is a schematic diagram of the oblique axonometric structure of the device of the present invention; Figure 3 This is a schematic diagram of the structure of the screen and light impurity separation component of the present invention; Figure 4 This is a bottom view of the negative pressure cover structure of the present invention; Figure 5 For the present invention Figure 3 A schematic diagram of the structure viewed from below; Figure 6 This is a schematic diagram of the slow-drying oven and the second conveyor belt of the present invention; Figure 7 This is a schematic diagram of the permanent magnet eddy current hot air generator assembly of the present invention; Figure 8 This is a schematic diagram of the turntable and strong magnet structure of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Base; 101. Frame plate; 102. Guide ramp; 103. Collection box; 2. Feed box; 201. First conveyor belt; 3. Mounting frame; 301. Screen; 302. Vibration exciter; 303. Impurity collection box; 4. Light impurity separation assembly; 401. Negative pressure hood; 402. Partition plate; 403. Negative pressure pipe; 404. Main pipe; 405. Suction pump; 406. Dust collection box; 407 1. Filter screen; 407. Air duct; 5. Second conveyor belt; 501. Conveyor roller; 502. Slow drying oven; 6. Permanent magnet eddy current hot air generator assembly; 601. Rotating shaft; 602. Large sprocket; 603. Small sprocket; 604. First chain; 605. Drive sprocket; 6051. Second chain; 606. Turntable; 6061. Strong magnet; 607. Copper pipe; 608. Exhaust pipe; 6081. Air outlet pipe. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] The embodiments of the present invention will now be described.

[0021] It should be noted that the uniformly distributed anti-slip protrusions on the surface of the first conveyor belt 201 prevent slippage of the belt surface when the tea leaves exit the feed box 2, ensuring stable and uniform feeding and avoiding uneven feeding that could affect the screening effect. The second conveyor belt 5 adopts a breathable and porous structure design, which increases the contact area between the hot air and the tea leaves on the belt surface, ensuring uniform heating during slow drying and avoiding uneven local humidity. Both conveyors are powered by matching geared drive motors, and the power parameters can be adjusted according to the actual tea type and processing output to adapt to different working conditions.

[0022] In this embodiment, please refer to Figure 1 - Figure 5As shown, a tea conveying and screening integrated machine with impurity separation function includes a base 1. Two frame plates 101 are fixed to the top two sides of the base 1. The two frame plates 101 are parallel to each other and perpendicular to the table surface of the base 1. A feeding box 2 is installed on one side of the top of the two frame plates 101. The feeding box 2 is an open-top material storage and feeding structure. A first conveyor belt 201 is provided in the feeding box 2. The first conveyor belt 201 is used to achieve uniform and stable feeding of the tea to be processed. A [missing information - likely a device or structure] is provided between the two frame plates 101 below the discharge end of the first conveyor belt 201. An inclined screen 301 is equipped with a vibration exciter 302. The screen 301 is mounted on a mounting frame 3. The outer walls of both sides of the mounting frame 3 are bolted to two frame plates 101. The vibration exciter 302 is fixedly mounted on the lower surface of the mounting frame 3. The vibration exciter 302 serves as the vibration power source for the screen 301 and can drive the screen 301 to vibrate continuously up and down in small amplitudes to achieve loose screening of tea leaves. The screen 301 has an inclined layout structure with high-level feeding and low-level discharge, which facilitates the tea leaves to automatically slide towards the discharge side during vibration. Below the screen 301 is a retractable collection box 303. The end face of the collection box 303 is equipped with a push-pull handle, which allows workers to manually pull it out to clean the heavy impurities accumulated inside. A guide plate 102 is provided on the low-position discharge side of the screen 301. The guide plate 102 receives the clean tea leaves after screening and guides the feeding. A second conveyor belt 5 is arranged below the guide plate 102. A slow drying chamber 502 is set outside the second conveyor belt 5. The slow drying chamber 502 is fixedly connected to the frame plate 101, forming a slow drying cavity on the second conveyor belt 5. The bottom end of the collection box 303 slides in contact with the top end of the slow drying box 502, ensuring that the equipment structure is compact and does not interfere with the pulling action of the collection box 303. The base 1 is located below the unloading end of the second conveyor belt 5 and has a push-pull opening for the collection box 103 to be placed in, for the final collection of the finished tea leaves after slow drying. A permanent magnet eddy current hot air generator 6 is provided next to the second conveyor belt 5. The permanent magnet eddy current hot air generator 6 uses the rotation power of the second conveyor belt 5 to obtain transmission power and generate hot air to slow dry the tea leaves conveyed on the second conveyor belt 5.

[0023] The equipment is supported by a base 1 and two vertical frame plates 101 on both sides to form a stable overall support structure. The tea leaves to be screened are fed into the open feed box 2 at the top. After the first conveyor belt 201 receives the tea leaves, it is conveyed at a uniform speed and falls stably onto the surface of the inclined screen 301. The vibrator 302 at the bottom of the mounting frame 3 continuously drives the screen 301 to vibrate up and down slightly, so that the accumulated tea leaves are fully loosened, turned over and slid at a low position along the inclined direction of the screen 301. Heavy particles such as stones and coarse sand mixed in the tea leaves penetrate the mesh of the screen 301 under the action of vibration screening and fall directly into the pull-out collection box 303 below for collection. The staff can pull out the collection box 303 by the handle to clean the impurities periodically. After the clean tea leaves have been screened for heavy impurities, they slide smoothly down the guide plate 102 on the low discharge side to the surface of the second conveyor belt 5 and are carried into the slow drying box 502 by the second conveyor belt 5. At the same time, during the operation of the whole machine, the permanent magnet eddy current hot air generator 6 starts working synchronously with the rotation power of the second conveyor belt 5. Finally, the finished tea leaves that have been slow dried are discharged with the end of the second conveyor belt 5 and fall into the collection box 103 placed in the push-pull opening of the base 1 to complete the collection of finished products. The dry vibrating screening mode eliminates the problem of wet tea leaves adhering to the screen 301 and clogging the mesh, effectively ensuring the screening transparency and operational continuity of the screen 301, and improving the screening accuracy and efficiency of the tea leaves. At the same time, the vibrating screening achieves efficient separation of tea leaves from heavy impurities such as stones and coarse sand. With the pull-out collection box 303, the daily cleaning and maintenance of the equipment is greatly facilitated. The overall structure is compact and reasonable, and the feeding, screening and discharging processes are continuous and stable, effectively solving the problems of easy clogging, incomplete impurity separation and cumbersome equipment maintenance in existing technologies.

[0024] Please see Figure 3 - Figure 5 As shown, a light impurity separation component 4 is provided above the screen 301. The light impurity separation component 4 is used to absorb and collect light impurities such as tea hairs and dust generated during the vibration of tea leaves. The light impurity separation component 4 includes a negative pressure cover 401, which covers the screen 301 and forms a sieving and suction chamber with the screen 301. Multiple negative pressure suction chambers are formed in the negative pressure cover 401 by multiple partitions 402, which can realize segmented and uniform suction of the screen 301 and avoid the problem of incomplete impurity removal caused by uneven local suction. The top of the negative pressure hood 401 is connected to multiple negative pressure pipes 403 at multiple negative pressure suction chambers. A dust collection box 406 is fixed to the outer wall of a frame plate 101 with screws. Multiple suction pumps 405 are installed at the top of the dust collection box 406. The suction ports of multiple suction pumps 405 are connected to a main pipe 404. The lower wall of multiple main pipes 404 is connected to the corresponding multiple negative pressure pipes 403, so that each independent negative pressure suction chamber corresponds to an independent suction path, ensuring suction stability. The dust collection box 406 is equipped with two high-precision filters 4061, which are layered and can perform double filtration on the intake airflow containing impurities, effectively trapping tea hairs and dust impurities. The bottom of the dust collection box 406 is provided with an exhaust port, and the bottom of the dust collection box 406 and the bottom of the side wall are connected to air supply pipes 407. Each air supply pipe 407 is connected to a copper pipe 607 installed in the permanent magnet eddy current hot air generator 6, which is used to send part of the air purified by the filter 4061 into the copper pipe 607 as the air source medium for hot air generation, realizing the airflow recycling.

[0025] While the tea leaves are being vibrated and sieved by the screen 301, multiple suction pumps 405 at the top of the dust collection box 406 start simultaneously. These pumps provide continuous negative pressure suction to the negative pressure hood 401 via the main pipe 404 and multiple negative pressure pipes 403, performing segmented and uniform negative pressure suction on the screen 301. Tea hairs, dust, and fine impurities raised during the vibration and loosening process are completely adsorbed and collected, effectively preventing light impurities from mixing into the finished tea. The airflow containing impurities enters the dust collection box 406 through pipes and undergoes double filtration by two layers of high-precision filters 4061. All light impurities are completely trapped. Part of the filtered clean air is discharged outwards, while the remainder is precisely delivered through the air delivery duct 407 to the copper pipe 607 of the permanent magnet eddy current hot air generator 6, providing a clean air source for subsequent hot air preparation and achieving the recycling and reuse of the dust removal airflow. Employing a segmented negative pressure suction structure, the light impurities under dry tea leaves do not absorb moisture and increase in weight, and can be completely suctioned and separated, overcoming the shortcomings of existing technologies such as residual light impurities and uneven impurity removal. At the same time, the filtered clean airflow is recycled and reused as the air source for hot air generation, eliminating the need to introduce external air and achieving closed-loop airflow circulation inside the equipment. This effectively reduces the overall energy consumption of the equipment and improves its resource utilization and environmental performance.

[0026] Please see Figure 6 - Figure 8 As shown, the permanent magnet eddy current hot air generating assembly 6 includes a transmission mechanism and multiple turntables 606. Each copper tube 607 is arranged on one side of the corresponding turntable 606. Several strong magnets 6061 are embedded in the outer ring of the side of the multiple turntables 606 facing the copper tubes 607. The positive and negative poles of two adjacent strong magnets 6061 are opposite. The ends of multiple exhaust pipes 608 are fixedly connected to the inner wall of the slow drying chamber 502. The air inlet ends of multiple copper tubes 607 are inserted into the top wall of the slow drying chamber 502 and connected to the corresponding air supply duct 407. The air outlet ends of multiple copper tubes 607 are inserted into the slow drying chamber 502 and connected to the exhaust pipes 608. Several air outlet pipes 6081 are connected to the lower surface of multiple exhaust pipes 608, which can evenly spray the heated hot air onto the tea leaves on the surface of the second conveyor belt 5 to achieve uniform slow drying. The transmission mechanism includes multiple parallel rotating shafts 601. The ends of the multiple rotating shafts 601 are rotatably connected to the inner wall of the slow drying oven 502. The multiple rotating shafts 601 are arranged in the area below the second conveyor belt 5, and the other ends of the multiple rotating shafts 601 extend to the outside through a frame plate 101. The end of a conveying roller 501 in the second conveyor belt 5 extends to the outside through a frame plate 101. A large sprocket 602 is fixedly installed on the shaft end of the conveying roller 501. The large sprocket 602 is connected to a small sprocket 603 through a first chain 604. The small sprocket 603 is fixedly installed on the end of a rotating shaft 601. The outer ends of the multiple rotating shafts 601 are fixedly installed with transmission sprockets 605. The multiple transmission sprockets 605 are connected to each other through a second chain 6051 to realize the synchronous and same speed rotation of multiple rotating shafts 601. Multiple turntables 606 are fixedly installed on the shaft ends of the corresponding rotating shafts 601.

[0027] When the equipment is running, the second conveyor belt 5 continuously conveys tea leaves. Its internal conveyor rollers 501 rotate synchronously, driving the large sprocket 602 fixed at the end to rotate. The large sprocket 602 drives the small sprocket 603 and the corresponding rotating shaft 601 to rotate through the first chain 604. The rotating shaft 601 drives all the other rotating shafts 601 to rotate synchronously and at the same speed through the end transmission sprocket 605 and the second chain 6051, so that the turntables 606 at the ends of each rotating shaft 601 rotate synchronously. During the rotation of turntable 606, adjacent strong magnets 6061 with opposite positive and negative poles rotate at high speed with the turntable, forming a continuous alternating magnetic field on the outside of copper tube 607. The electromagnetic eddy current effect causes copper tube 607 to heat up autonomously and uniformly. Clean air introduced by air supply duct 407 is heated inside copper tube 607 to form low-temperature hot air. After being split by exhaust pipe 608, the hot air is evenly sprayed downwards through densely arranged air outlet pipes 6081 to slowly dry the clean tea leaves conveyed on the second conveyor belt 5 at a low temperature. The system utilizes the power of the conveyor belt to achieve fully automated operation of the hot air components, eliminating the need for separate drying motors and heating equipment, thus further reducing equipment power consumption and operating costs. Simultaneously, it employs a permanent magnet eddy current low-temperature slow drying mode, coupled with a uniformly distributed hot air jet structure, avoiding the aroma loss, yellowing, and spoilage problems associated with traditional high-temperature drying, thus preserving the original flavor and quality of the tea to the greatest extent possible.

[0028] The working principle of this invention is as follows: The tea leaves to be screened are put into the top open feed box 2. After the first conveyor belt 201 receives the tea leaves, it is conveyed at a uniform speed to the surface of the inclined screen 301. The vibrator 302 under the mounting frame 3 is started, continuously driving the screen 301 to vibrate up and down slightly. The tea leaves piled on the screen 301 are constantly loosened and turned over, and slowly slide along the screen 301 from high to low position. Heavy impurities such as stones and coarse sand mixed in the tea leaves pass through the mesh of the screen 301 and fall into the removable collection box 303 below the screen 301 for collection. While the sieve 301 is sieving, the suction pump 405 at the top of the dust collection box 406 works simultaneously. Through the main pipe 404 and the negative pressure pipe 403, a negative pressure environment is formed inside the negative pressure hood 401, which draws the sieve 301 in sections evenly. Light impurities such as tea hairs and dust raised by the vibration of the tea leaves are drawn into the negative pressure hood 401 with the airflow and transported to the dust collection box 406. The airflow is double-filtered by two layers of filter screens 4061 inside the dust collection box 406, and the light impurities are intercepted. Part of the filtered clean air is discharged to the outside, and the other part is sent into the copper pipe 607 of the permanent magnet eddy current hot air generator 6 through the air delivery pipe 407. After the tea leaves are separated into light and heavy impurities, they slide down the guide plate 102 onto the second conveyor belt 5. The second conveyor belt 5 carries the tea leaves into the slow drying box 502 for conveying. During the operation of the second conveyor belt 5, the large sprocket 602 at the end of the conveyor roller 501 rotates accordingly. The small sprocket 603 and the corresponding rotating shaft 601 are driven to rotate through the first chain 604. The rotating shaft 601 drives the other rotating shafts 601 to rotate synchronously and at the same speed through the transmission sprocket 605 and the second chain 6051. The turntable 606 at the end of the rotating shaft 601 rotates accordingly. The strong magnets 6061 with opposite magnetic poles embedded in the turntable 606 continue to rotate, forming an alternating magnetic field around the copper tube 607. The copper tube 607 is heated by the electromagnetic eddy current effect.

[0029] The clean air delivered into the copper pipe 607 by the air supply duct 407 is heated to form hot air. The hot air flows along the exhaust pipe 608 and is evenly sprayed out from the air outlet pipe 6081 below the exhaust pipe 608, which performs low-temperature slow drying on the tea leaves on the second conveyor belt 5. After the slow drying process is completed, the tea leaves are transported to the unloading end along the second conveyor belt 5 and finally fall into the collection box 103 placed inside the push-pull opening of the base 1 to complete the collection.

[0030] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A tea conveying and screening integrated machine with impurity separation function, comprising a base (1), wherein frame plates (101) are fixed on both sides of the top of the base (1), characterized in that, A feeding box (2) is installed on one side of the top of the two frame plates (101). A first conveyor belt (201) is provided in the feeding box (2). An inclined screen (301) is provided between the two frame plates (101) below the discharge end of the first conveyor belt (201). A vibration exciter (302) is provided on the screen (301). A light impurity separation component (4) is provided above the screen (301). The light impurity separation component (4) is used to absorb and collect light impurities such as tea hairs and dust generated during the vibration of tea leaves. Below the screen (301) is a retractable collection box (303). The screen (301) has a guide plate (102) on the low discharge side. A second conveyor belt (5) is arranged below the guide plate (102). A slow drying box (502) is arranged outside the second conveyor belt (5). The slow drying box (502) is fixedly connected to the frame plate (101). A permanent magnet eddy current hot air generator (6) is arranged next to the second conveyor belt (5). The permanent magnet eddy current hot air generator (6) uses the rotation power of the second conveyor belt (5) to obtain transmission power and generate hot air to slowly dry the tea leaves conveyed on the second conveyor belt (5).

2. The integrated tea conveying and screening machine with impurity separation function according to claim 1, characterized in that, The light impurity separation component (4) includes a negative pressure hood (401), which is placed above the screen (301). Multiple negative pressure suction chambers are formed in the negative pressure hood (401) by multiple partitions (402). Multiple negative pressure pipes (403) are connected to the top of the negative pressure hood (401) at the multiple negative pressure suction chambers. A dust collection box (406) is fixed to the outer wall of a frame plate (101) by screws. Multiple suction pumps (405) are installed at the top of the dust collection box (406). The suction ports of the multiple suction pumps (405) are connected to a main pipe (404). The lower pipe walls of the multiple main pipes (404) are connected to the corresponding multiple negative pressure pipes (403).

3. The integrated tea conveying and screening machine with impurity separation function according to claim 2, characterized in that, The dust collection box (406) is equipped with two layers of filter screens (4061). The bottom of the dust collection box (406) is provided with an exhaust port. The bottom of the dust collection box (406) and the bottom of the side wall are connected to air supply pipes (407). Each air supply pipe (407) is connected to a copper pipe (607) installed in the permanent magnet eddy current hot air generator assembly (6) to send part of the air purified by the filter screen (4061) into the copper pipe (607).

4. The integrated tea conveying and screening machine with impurity separation function according to claim 3, characterized in that, The permanent magnet eddy current hot air generating assembly (6) includes a transmission mechanism and multiple turntables (606). Each copper tube (607) is arranged on one side of the corresponding turntable (606). Several strong magnets (6061) are embedded in the outer ring of the side of the multiple turntables (606) facing the copper tube (607). The positive and negative poles of two adjacent strong magnets (6061) are opposite.

5. The integrated tea conveying and screening machine with impurity separation function according to claim 4, characterized in that, The transmission mechanism includes multiple rotating shafts (601). The end of a conveying roller (501) in the second conveyor belt (5) extends to the outside through a frame plate (101). A large sprocket (602) is fixedly installed on the shaft end of the conveying roller (501). The ends of the multiple rotating shafts (601) are rotatably connected to the inner wall of the slow drying oven (502). The multiple rotating shafts (601) are arranged in the area below the second conveyor belt (5), and the other end of the multiple rotating shafts (601) extends to the outside through a frame plate (101).

6. The integrated tea conveying and screening machine with impurity separation function according to claim 5, characterized in that, The large sprocket (602) is connected to a small sprocket (603) via a first chain (604). The small sprocket (603) is fixedly installed at the end of a rotating shaft (601). Multiple rotating shafts (601) are fixedly installed with transmission sprockets (605) at their external ends. Multiple transmission sprockets (605) are connected to each other via a second chain (6051). Multiple turntables (606) are fixedly installed on the shaft ends of their corresponding rotating shafts (601).

7. The integrated tea conveying and screening machine with impurity separation function according to claim 3, characterized in that, The outlet ends of the multiple copper pipes (607) are inserted into the slow drying oven (502) and connected to the exhaust pipe (608). The lower surfaces of the multiple exhaust pipes (608) are connected to several exhaust pipes (6081). The ends of the multiple exhaust pipes (608) are fixedly connected to the inner wall of the slow drying oven (502). The inlet ends of the multiple copper pipes (607) are inserted into the top wall of the slow drying oven (502) and connected to the corresponding gas supply pipe (407).

8. The integrated tea conveying and screening machine with impurity separation function according to claim 1, characterized in that, The bottom end of the collection box (303) is in sliding contact with the top end of the slow drying oven (502), and the end face of the collection box (303) is provided with a push-pull handle.

9. A tea conveying and screening integrated machine with impurity separation function according to claim 1, characterized in that, The screen (301) is mounted on the mounting frame (3), and the outer walls of both sides of the mounting frame (3) are bolted to the two frame plates (101). The vibration exciter (302) is fixedly assembled on the lower surface of the mounting frame (3).

10. A tea conveying and screening integrated machine with impurity separation function according to claim 1, characterized in that, The base (1) is located below the unloading end of the second conveyor belt (5) and has a push-pull opening for placing the collection box (103).

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