Tea grading and screening equipment with dust removal function
By designing a circulating pump and air supply pipe, combined with a dust collection and air supply structure, the direction of dust flow is controlled, solving the problem of dust scattering in tea grading and screening equipment, and achieving efficient dust removal and grading and screening.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YIBIN ZHUANGNONG AGRICULTURAL DEVELOPMENT CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-02
AI Technical Summary
In existing tea grading and screening equipment with dust removal function, dust is widely distributed inside the equipment and its movement trajectory is uncontrollable, causing some dust to fall and adhere to the inside of the equipment, affecting the grading, screening and dust removal effect of tea.
The design employs a circulating pump and air supply duct to create a horizontal airflow that controls the direction of dust flow. Combined with the flared and air-distributing components of the suction pipe and air supply duct, it achieves active air intake and dust removal, preventing secondary pollution of the tea leaves by external air.
It effectively controls the flow direction of dust within the equipment, improves dust removal efficiency, prevents tea leaves from being secondary polluted by outside air, reduces the frequency of filter maintenance, and enhances the grading and screening effect.
Smart Images
Figure CN224308942U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tea processing technology, and in particular to a tea grading and screening device with dust removal function. Background Technology
[0002] Tea leaves, commonly known as tea, generally include the leaves and buds of the tea plant. Tea contains catechins, cholesterol, caffeine, inositol, folic acid, and pantothenic acid, which are beneficial to health. Tea beverages are one of the world's three major beverages. Because the size and shape of the tea leaves vary, the quality of the finished products also varies. Therefore, during the processing of dried tea leaves, tea grading and screening equipment is generally used to grade and screen the tea leaves.
[0003] A search revealed a tea grading and screening device disclosed in patent document CN220781292U, comprising a main body, a first sieve plate, a second sieve plate, a third sieve plate, and a receiving structure. The first sieve plate is located on top of the main body, the second sieve plate is located inside the main body below the first sieve plate, and the third sieve plate is located inside the main body below the second sieve plate. Each of the first, second, and third sieve plates has a discharge port on one end of the side wall of the main body. A receiving structure is installed on the outer wall of the main body at the discharge port location. The receiving structure includes a receiving frame, a guide ramp, and a receiving drawer. The receiving frame is fixed to the outer wall of the main body at the discharge port location, and the guide ramp is fixed to the outer wall of the main body inside the receiving frame.
[0004] Based on the above research and existing technology, it was found that most existing tea grading and screening equipment with dust removal function connects the end of the dust suction pipe to the inside of the equipment and uses a dust suction fan or air pump to suck up the dust inside the equipment. However, since the dust is widely distributed inside the equipment, and the suction range of the end of the dust suction pipe is limited, and existing equipment generally does not have an active air intake structure, the movement trajectory of the dust is uncontrollable. This causes some dust to scatter and adhere to various corners or parts inside the equipment, making it difficult to remove. Over time, this will affect the subsequent tea grading, screening, and dust removal effects. Therefore, a tea grading and screening equipment with dust removal function is needed. Utility Model Content
[0005] The purpose of this application is to provide a tea grading and screening device with dust removal function to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this application provides the following technical solution: a tea grading and screening device with dust removal function, including a screening box, screens and a vibrating motor. Multiple screens are provided and are all inclined inside the screening box. The inclination directions of two adjacent screens are opposite. Multiple vibrating motors are provided and are respectively installed at the lower end of multiple screens. The vibrating motors are fixed to the inner side wall of the screening box and are used to drive the screens to vibrate.
[0007] A circulation pump is fixed above the screening box. The air inlet of the circulation pump is fixedly connected to a filter through an air inlet pipe. The air outlet of the filter is fixedly connected to the end of the air inlet pipe away from the circulation pump. The air inlet of the filter is fixedly connected to a dust suction pipe. The other end of the dust suction pipe is connected to the inner cavity of the screening box, and the other end of the dust suction pipe is located at the rear of the screening box.
[0008] The air outlet of the circulating pump is fixed and connected to an air supply pipe. The end of the air supply pipe away from the circulating pump is also connected to the inner cavity of the screening box, and the other end of the air supply pipe is located on the front side of the screening box.
[0009] The air supply pipe and the dust suction pipe are positioned correspondingly, with the connection points between the air supply pipe and the screening box and the dust suction pipe and the screening box located above or below the screen.
[0010] A barrier structure is installed above the screen to prevent tea leaves from entering the suction pipe with the airflow.
[0011] Preferably, the end of the suction pipe that connects to the screening box is provided with a flare to increase the suction area of the suction pipe, and the end of the air supply pipe that connects to the screening box is provided with a distribution element to increase the air supply area of the air supply pipe.
[0012] Preferably, the flared part includes a dust collection box, which is a box with an opening on one side. The dust collection box is fixedly embedded in the rear side wall of the screening box, with the opening of the dust collection box facing the inside of the screening box. The back side of the dust collection box is fixed and connected to the other end of the dust collection pipe.
[0013] A vacuum cleaner hose is a pipe with multiple branch pipes.
[0014] Preferably, the air supply duct is also a duct with multiple branches, and the branches of the multiple air supply ducts correspond one-to-one with the branches of the multiple dust collection ducts.
[0015] The air distribution component includes an air distribution box, which is a hollow box. The air distribution box is fixedly embedded in the front side wall of the screening box. The front side wall of the air distribution box is fixed and connected to the other end of the air supply pipe. An air outlet is provided on the inner side wall of the air distribution box. The air outlet is a vertical elongated hole and is evenly distributed along the length of the air distribution box.
[0016] Preferably, the barrier structure includes a lower baffle, the two ends of which are fixed to the inner walls of the left and right sides of the screening box, respectively;
[0017] The lower baffle is a trapezoidal plate with the same inclination angle as the screen at its lower end. There is a gap between the upper end of the lower baffle and the top wall of the screening box or the bottom wall of the screen above it, allowing airflow and dust to pass through.
[0018] The position of the dust collection box corresponds to the middle of the lower baffle in the height direction.
[0019] Preferably, the baffle structure further includes an upper baffle, which is located on the side of the lower baffle away from the dust collection box. The upper baffle is a long plate whose upper end is inclined at the same angle as the top of the screening box or the bottom of the screen. The two ends of the upper baffle are fixed to the inner walls of the left and right sides of the screening box, respectively.
[0020] There is a gap between the lower end of the upper baffle and the screen below the screen to allow airflow and dust to pass through;
[0021] The lower part of the upper baffle and the upper part of the lower baffle partially overlap in the horizontal direction.
[0022] In summary, the technical effects and advantages of this utility model are as follows:
[0023] 1. In this utility model, by setting up a circulating pump and an air supply pipe, during the grading and screening process, the operator only needs to turn on the circulating pump. When the circulating pump is working, it sucks out the dust in the screening box through the dust suction pipe and allows the dust to enter the filter for filtration. The filtered clean air then enters the circulating pump through the air inlet pipe and is then sent into the screening box through the air supply pipe. Since the connection between the dust suction pipe and the screening box corresponds to the connection between the air supply pipe and the screening box, a transverse airflow is formed in the screening box, which can control the flow direction of the dust and thus improve the dust removal effect of the tea grading and screening equipment.
[0024] Meanwhile, existing technologies do not have an active air intake structure, so outside air will enter the screening box through the suction of the dust collector. If there is a lot of dust in the outside air, it will also cause secondary pollution to the tea. However, this application uses an active air intake method to not only create a relatively sealed air circulation in the screening box, making it easier to control the direction of dust movement, but also ensures that the air sent into the screening box is treated and clean air. Therefore, it avoids the phenomenon of secondary pollution of the tea by the outside air and achieves a better dust removal effect.
[0025] 2. In this utility model, through the arrangement of the dust collection box and the air distribution box, the opening range of the dust collection box and the air distribution box is much larger than the diameter of the suction pipe or the air supply pipe. (Refer to...) Figure 1 and Figure 3 As shown, both the air distribution box and the dust collection box are long and narrow, with a length span that can cover the screening area of the screen. Therefore, they can better perform dust removal or air supply operations over a larger area, thus more effectively removing dust from inside the screening box. The larger dust collection range can also improve dust removal efficiency.
[0026] 3. In this utility model, the lower baffle can intercept the broken tea leaves that move with the airflow. After hitting the lower baffle, the broken tea leaves fall onto the screen and are collected in the tea leaf collection tray below after being screened layer by layer. This achieves the separation of dust and broken tea leaves, preventing the lighter broken tea leaves from being sucked out with the dust, thus reducing the workload of the filter and decreasing the frequency of cleaning and maintenance by the staff, ensuring the effective filtration of the filter. Attached Figure Description
[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0028] Figure 1 This is a schematic diagram of the three-dimensional structure in this embodiment;
[0029] Figure 2 This is a schematic diagram of the cross-section structure in this embodiment;
[0030] Figure 3 This is a schematic diagram of the side section structure in this embodiment.
[0031] In the diagram: 1. Screening box; 11. Feed hopper; 12. Tea outlet; 13. Fixing frame; 14. Collection frame; 15. Broken tea collection tray; 2. Screen; 3. Air distribution box; 31. Air outlet; 4. Circulation pump; 41. Dust suction pipe; 42. Filter; 43. Air supply pipe; 44. Air inlet pipe; 5. Dust collection box; 6. Vibration motor; 7. Lower baffle; 8. Upper baffle. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] Example: Reference Figures 1-3The tea grading and screening equipment with dust removal function shown includes a screening box 1, a screen 2 and a vibration motor 6. Multiple screens 2 are provided and are all inclined inside the screening box 1. The inclination directions of two adjacent screens 2 are opposite. Multiple vibration motors 6 are provided and are respectively installed at the lower end of multiple screens 2. The vibration motors 6 are fixed to the inner side wall of the screening box 1 and are used to drive the screens 2 to vibrate.
[0034] The upper end of the screening box 1 is fixed with a feed hopper 11 with a cover plate. Tea outlets 12 are opened on the side walls of the left and right sides of the screening box 1. Multiple tea outlets 12 are opened and correspond to the lower end positions of multiple screens 2 respectively. Fixed frames 13 are fixed on the outer walls of the left and right sides of the screening box 1. A collection frame 14 is slidably connected inside the fixed frame 13. The upper end of the collection frame 14 is located below the tea outlets 12. A broken tea collection tray 15 is slidably inserted into the front end of the screening box 1. The broken tea collection tray 15 is located at the bottom of the screening box 1 and below the lowest screen 2.
[0035] A circulation pump 4 is fixed above the screening box 1. The air inlet of the circulation pump 4 is fixedly connected to a filter 42 through an air inlet pipe 44. The air outlet of the filter 42 is fixedly connected to the end of the air inlet pipe 44 away from the circulation pump 4. The air inlet of the filter 42 is fixedly connected to a dust suction pipe 41. The other end of the dust suction pipe 41 is connected to the inner cavity of the screening box 1, and the other end of the dust suction pipe 41 is located at the rear of the screening box 1.
[0036] The outlet of the circulating pump 4 is fixed and connected to an air supply pipe 43. The end of the air supply pipe 43 away from the circulating pump 4 is also connected to the inner cavity of the screening box 1, and the other end of the air supply pipe 43 is located on the front side of the screening box 1.
[0037] The air supply pipe 43 and the dust suction pipe 41 are positioned correspondingly, and the connection between the air supply pipe 43 and the screening box 1 and the connection between the dust suction pipe 41 and the screening box 1 are both located above or below the screen 2.
[0038] A barrier structure is provided above the screen 2 to prevent tea leaves from entering the suction pipe 41 with the airflow.
[0039] Based on the above structure, during the grading and screening process, the staff only needs to turn on the circulation pump 4. When the circulation pump 4 is working, it sucks out the dust in the screening box 1 through the dust suction pipe 41 and allows the dust to enter the filter 42 for filtration. The filtered clean air then enters the circulation pump 4 through the air inlet pipe 44 and is then sent into the screening box 1 through the air supply pipe 43. Since the connection between the dust suction pipe 41 and the screening box 1 corresponds to the connection between the air supply pipe 43 and the screening box 1, a transverse airflow is formed in the screening box 1, which can control the flow direction of the dust (i.e., control the air flow in the screening box 1 to carry the dust and move in the same direction), thereby improving the dust removal effect of the tea grading and screening equipment.
[0040] Meanwhile, existing technologies do not have an active air intake structure, so outside air will enter the screening box 1 through the suction of the dust collector. If there is a lot of dust in the outside air, it will also cause secondary pollution to the tea. However, this application can not only form a relatively sealed air circulation in the screening box 1 by actively intake, which makes it easier to control the direction of dust movement, but also the air sent into the screening box 1 is treated clean air. Therefore, it avoids the phenomenon of secondary pollution of tea by outside air and achieves a better dust removal effect.
[0041] Furthermore, the end of the suction pipe 41 connected to the screening box 1 is provided with a flaring part for increasing the adsorption area of the suction pipe 41, and the end of the air supply pipe 43 connected to the screening box 1 is provided with an air distribution part for increasing the air supply area of the air supply pipe 43.
[0042] The flared part includes a dust collection box 5, which is a box with an opening on one side. The dust collection box 5 is fixedly embedded in the rear side wall of the screening box 1. The opening of the dust collection box 5 faces the inside of the screening box 1. The back side of the dust collection box 5 is fixed and connected to the other end of the suction pipe 41. The suction pipe 41 is a pipe with multiple branches.
[0043] The air supply duct 43 is also a pipe with multiple branch pipes, and the branch pipes of the multiple air supply ducts 43 correspond one-to-one with the branch pipes of the multiple dust suction pipes 41; the air distribution component includes an air distribution box 3, which is a hollow box. The air distribution box 3 is fixedly embedded in the front side wall of the screening box 1. The front side wall of the air distribution box 3 is fixed and connected to the other end of the air supply duct 43. An air outlet 31 is provided on the inner side wall of the air distribution box 3. The air outlet 31 is a vertical elongated hole and is evenly distributed along the length of the air distribution box 3.
[0044] By configuring the dust collection box 5 and the air supply box 3, the opening range of the dust collection box 5 and the air supply box 3 is much larger than the diameter of the suction pipe 41 or the air supply pipe 43. (Refer to...) Figure 1 and Figure 3 As shown, both the air distribution box 3 and the dust collection box 5 are long and narrow boxes, and their length span can cover the screening area of the screen 2. Therefore, they can better carry out dust removal or air supply operations over a larger area, thereby more effectively removing dust from the inside of the screening box 1. The larger dust collection range can also improve dust removal efficiency.
[0045] Furthermore, the barrier structure includes a lower baffle 7, with both ends of the lower baffle 7 fixed to the inner walls of the left and right sides of the screening box 1, respectively.
[0046] The lower baffle 7 is a trapezoidal plate with the same inclination angle as the screen 2 at its lower end. There is a gap between the upper end of the lower baffle 7 and the inner top wall of the screening box 1 or the bottom wall of the screen 2 above it for airflow and dust to pass through.
[0047] The position of the dust collection box 5 corresponds to the middle of the lower baffle 7 in the height direction;
[0048] By setting the lower baffle 7, the broken tea leaves that move with the airflow can be intercepted. After hitting the lower baffle 7, the broken tea leaves fall onto the screen 2 and are collected in the broken tea collection tray 15 below after being screened layer by layer. This achieves the separation of dust and broken tea leaves, preventing the lighter broken tea leaves from being sucked out with the dust, thus reducing the workload of the filter 42 and reducing the frequency of cleaning and maintenance by the staff, ensuring the effective filtration of the filter 42.
[0049] Furthermore, the barrier structure also includes an upper baffle 8, which is located on the side of the lower baffle 7 away from the dust collection box 5. The upper baffle 8 is a long plate whose upper end is inclined at the same angle as the top of the screening box 1 or the bottom of the screen 2. The two ends of the upper baffle 8 are fixed to the inner walls of the left and right sides of the screening box 1, respectively.
[0050] There is a gap between the lower end of the upper baffle 8 and the screen 2 below the screen 2 to allow airflow and dust to pass through;
[0051] Among them, the lower part of the upper baffle 8 and the upper part of the lower baffle 7 partially overlap in the horizontal direction;
[0052] When the upper baffle 8 is used in conjunction with the lower baffle 7, it can more effectively intercept broken tea leaves, thereby better preventing broken tea leaves from entering the filter 42 and increasing the workload of the filter 42. At the same time, the gaps left can meet the flow requirements of dust and air, reducing the impact on dust removal work.
[0053] The working principle of this utility model is as follows: In daily use, the staff first need to open the feeding hopper 11 and put the tea leaves to be graded and screened into the feeding hopper 11. Then, the feeding hopper 11 is closed to form a relatively sealed structure inside the screening box 1, reducing the interference of external air. The tea leaves are graded and screened by multiple screens 2 from top to bottom.
[0054] During the screening process, the staff only needs to turn on the circulation pump 4. When the circulation pump 4 is working, it sucks out the dust in the screening box 1 through the dust suction pipe 41 and allows the dust to enter the filter 42 for filtration. The filtered clean air then enters the circulation pump 4 through the air inlet pipe 44 and is then sent into the screening box 1 through the air supply pipe 43. Since the connection between the dust suction pipe 41 and the screening box 1 corresponds to the connection between the air supply pipe 43 and the screening box 1, a horizontal airflow is formed in the screening box 1, which can control the flow direction of the dust and thus improve the dust removal effect of the tea grading and screening equipment.
[0055] Meanwhile, the existing technology does not have an active air intake structure, so outside air will enter the screening box 1 through the suction of the dust collector. If there is a lot of dust in the outside air, it will also cause secondary pollution to the tea. However, the present application can not only form a relatively sealed air circulation in the screening box 1 by active air intake, which makes it easier to control the direction of dust movement, but also the air sent into the screening box 1 is treated clean air. Therefore, it avoids the phenomenon of secondary pollution of tea by outside air and achieves a better dust removal effect.
[0056] Furthermore, due to the arrangement of the dust collection box 5 and the air distribution box 3, the opening range of the dust collection box 5 and the air distribution box 3 is much larger than the diameter of the suction pipe 41 or the air supply pipe 43, for reference. Figure 1 and Figure 3 As shown, both the air distribution box 3 and the dust collection box 5 are long and narrow boxes, and their length span can cover the screening area of the screen 2. Therefore, they can better carry out dust removal or air supply operations over a larger area, thereby more effectively removing dust from the inside of the screening box 1. The larger dust collection range can also improve dust removal efficiency.
[0057] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A tea grading and screening device with dust removal function, comprising a screening box (1), screens (2), and a vibration motor (6), wherein multiple screens (2) are provided and are all inclinedly arranged inside the screening box (1), and the inclination directions of two adjacent screens (2) are opposite; multiple vibration motors (6) are provided and are respectively installed at the lower ends of multiple screens (2); the vibration motors (6) are fixed to the inner side wall of the screening box (1); the vibration motors (6) are used to drive the screens (2) to vibrate, characterized in that: A circulation pump (4) is fixed above the screening box (1). The air inlet of the circulation pump (4) is fixedly connected to a filter (42) through an air inlet pipe (44). The air outlet of the filter (42) is fixedly connected to the end of the air inlet pipe (44) away from the circulation pump (4). The air inlet of the filter (42) is fixedly connected to a dust suction pipe (41). The other end of the dust suction pipe (41) is connected to the inner cavity of the screening box (1), and the other end of the dust suction pipe (41) is located at the rear side of the screening box (1). The outlet of the circulating pump (4) is fixed and connected to an air supply pipe (43). The end of the air supply pipe (43) away from the circulating pump (4) is also connected to the inner cavity of the screening box (1), and the other end of the air supply pipe (43) is located on the front side of the screening box (1). The air supply pipe (43) and the dust suction pipe (41) are positioned correspondingly, and the connection between the air supply pipe (43) and the screening box (1) and the connection between the dust suction pipe (41) and the screening box (1) are both located above or below the screen (2). The screen (2) is provided with a barrier structure above it to prevent tea leaves from entering the suction pipe (41) with the airflow.
2. The tea grading and screening equipment with dust removal function according to claim 1, characterized in that: The end of the suction pipe (41) connected to the screening box (1) is provided with a flaring part for increasing the adsorption area of the suction pipe (41), and the end of the air supply pipe (43) connected to the screening box (1) is provided with a distribution part for increasing the air supply area of the air supply pipe (43).
3. The tea grading and screening equipment with dust removal function according to claim 2, characterized in that: The flared part includes a dust collection box (5), which is a box with an opening on one side. The dust collection box (5) is fixedly embedded in the rear side wall of the screening box (1). The opening of the dust collection box (5) faces the inside of the screening box (1). The back side of the dust collection box (5) is fixed and connected to the other end of the dust collection pipe (41). The suction pipe (41) is a pipe with multiple branches.
4. The tea grading and screening equipment with dust removal function according to claim 2, characterized in that: The air supply pipe (43) is also a pipe with multiple branches, and the branches of the multiple air supply pipes (43) correspond one-to-one with the branches of the multiple dust suction pipes (41). The air distribution component includes an air distribution box (3), which is a hollow box. The air distribution box (3) is fixedly embedded in the front side wall of the screening box (1). The front side wall of the air distribution box (3) is fixed and connected to the other end of the air supply pipe (43). An air outlet (31) is provided on the inner side wall of the air distribution box (3). The air outlet (31) is a vertical elongated hole. The air outlet (31) is evenly distributed along the length of the air distribution box (3).
5. A tea grading and screening device with dust removal function according to claim 3, characterized in that: The barrier structure includes a lower baffle (7), and the two ends of the lower baffle (7) are fixed to the inner walls of the left and right sides of the screening box (1), respectively. The lower baffle (7) is a trapezoidal plate with the same inclination angle between its lower end and the screen (2). There is a gap between the upper end of the lower baffle (7) and the inner top wall of the screening box (1) or the bottom wall of the screen (2) above it for airflow and dust to pass through. The position of the dust collection box (5) corresponds to the middle part of the lower baffle (7) in the height direction.
6. The tea grading and screening equipment with dust removal function according to claim 5, characterized in that: The barrier structure also includes an upper baffle (8), which is located on the side of the lower baffle (7) away from the dust collection box (5). The upper baffle (8) is a long plate with its upper end inclined at the same angle as the top of the screening box (1) or the bottom of the screen (2). The two ends of the upper baffle (8) are respectively fixed to the inner walls of the left and right sides of the screening box (1). There is a gap between the lower end of the upper baffle (8) and the screen (2) below the screen (2) for airflow and dust to pass through; The lower part of the upper baffle (8) and the upper part of the lower baffle (7) partially overlap in the horizontal direction.