A tea grading device

Abstract

This utility model discloses a tea grading device in the field of tea production technology, comprising: a box body; multiple inclined plates arranged in a stepped manner within the box body for guiding tea leaves to slide along their surface; multiple positive pressure blowing components located below the corresponding inclined plates for blowing air upwards to separate lighter tea leaves; and multiple negative pressure suction components located above the corresponding inclined plates for collecting the separated lighter tea leaves. The inclined plates have multiple sets of equally spaced first air outlets in the areas corresponding to the positive pressure blowing components. Multiple equally spaced rollers are also rotatably mounted on the inclined plates, with the rollers and first air outlets alternately arranged along the sliding direction of the tea leaves. The rollers assist in dispersing the tea leaves to coordinate with the airflow for grading. The stepped inclined plate design of this device enables multi-level grading, and the combination of positive pressure blowing, negative pressure suction, and rolling dispersion significantly improves grading accuracy and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tea production technology, specifically to a tea grading device. Background Technology

[0002] In the refining process of tea, grading is one of the key steps that determines the quality and commercial value of tea. Among them, airflow grading technology is widely used for separating light and heavy components in various types of tea, such as green tea, black tea, and oolong tea, due to its advantages of non-contact processing, high efficiency, and strong adaptability.

[0003] The core of airflow grading devices is to create a separation field through controllable airflow (such as horizontal or vertical airflow). Tea leaves, due to their different weight, volume, and shape, exhibit different trajectories in the airflow, thus achieving grading. However, in actual operation, existing airflow grading devices are prone to material accumulation or adhesion on the inclined plate surface, forming a material layer that hinders effective airflow penetration. This results in lighter tea leaves not being fully lifted, leading to missed or mixed grading, which seriously affects the grading accuracy. Furthermore, existing airflow grading devices have a single airflow direction and cannot create a multi-directional three-dimensional airflow field. The airflow can only act on the tea leaves from a single direction, resulting in significant deficiencies in the level of grading precision.

[0004] To address these issues, a tea grading device is provided. Utility Model Content

[0005] The purpose of this invention is to provide a tea grading device that solves the problem in existing grading equipment where tea leaves are easily stacked and stuck together, causing airflow to be unable to act evenly on each tea leaf, resulting in uneven grading and incomplete separation.

[0006] This utility model achieves the above objectives through the following technical solutions: A tea grading device, comprising: Box; Multiple inclined plates, arranged in a stepped manner, are placed inside the box to guide the tea leaves to slide along its surface; Multiple positive pressure blowing components are located below the corresponding inclined plate and are used to blow air upwards to separate light tea leaves; Multiple negative pressure suction components are positioned above the corresponding inclined plate to collect the separated light tea leaves; The inclined plate has multiple sets of equally spaced first air outlets in the area corresponding to the positive pressure blowing component. The inclined plate is also rotatably provided with multiple equally spaced rollers. The rollers and the first air outlets are alternately arranged along the sliding direction of the tea leaves. The rollers are used to assist in dispersing the tea leaves to cooperate with the airflow to achieve grading.

[0007] As a further optimization of this utility model, the top of the box is provided with a feed inlet, and the bottom of the inside of the box is provided with a receiving groove; the back of the box is provided with a drive mechanism for driving the roller to rotate.

[0008] As a further optimization of this utility model, the positive pressure blowing assembly includes multiple blowing channels, each of which is connected to a set of first air outlets. An air source device connected to the blowing channels is provided on the back of the housing.

[0009] As a further optimization of this utility model, the negative pressure suction assembly includes a suction trough, a receiving box fixedly disposed on the outside of the box and connected to the suction trough, and a negative pressure device fixedly disposed on the outside of the receiving box and connected to the receiving box; the suction trough has a plurality of strip-shaped suction ports that correspond one-to-one with the blowing trough on the side facing the inclined plate, and a perforated air distribution plate is embedded in both the strip-shaped suction ports and the blowing trough.

[0010] As a further optimization of this utility model, an auxiliary air blowing pipe is provided inside the drum, and a plurality of evenly distributed third air outlets are opened on the upper surface of the auxiliary air blowing pipe; a plurality of evenly distributed second air outlets are opened on the surface of the drum along the circumference, and the second air outlets are periodically aligned with the third air outlets to spray multi-directional auxiliary airflow onto the tea leaves.

[0011] As a further optimization of this utility model, hollow rotating shafts are fixed at both ends of the roller, and the auxiliary air blowing pipe passes through the rotating shaft and is fixed on the box body, and is connected to an external air source device.

[0012] As a further optimization of this utility model, the surface of the roller is provided with a plurality of evenly distributed elastic blocks along the circumferential direction; the surface of the roller is provided with mounting holes for mounting the elastic blocks, and the mounting holes are periodically aligned with the third air outlet to drive the elastic blocks to pop out and impact the tea leaves attached to the surface of the roller.

[0013] As a further optimization of this utility model, the elastic block includes an elastic block body and a spring. One end of the spring is fixedly disposed in the mounting hole, and the other end is fixedly disposed on the elastic block body. The elastic block body is movably disposed in the mounting hole. The surface of the elastic block body and the surface of the roller are both provided with anti-slip texture.

[0014] The beneficial effects of this utility model are as follows: 1. The stepped inclined plate design of this utility model can realize multi-level grading. Through the combination of positive pressure blowing, negative pressure suction and rolling dispersion, the grading accuracy and efficiency are significantly improved. During the rotation of the roller, mechanical disturbance is generated on the tea leaves, which can not only effectively break up the stacked or agglomerated tea leaves and improve the uniformity of material distribution, but also cause the tea leaves to turn over, so that different surfaces of the tea leaves are fully exposed to the airflow action area.

[0015] 2. This utility model further enhances the ability to disturb and disperse tea leaves through the synergistic effect of multi-directional auxiliary airflow and elastic blocks, effectively preventing tea leaf accumulation and adhesion, and further improving grading accuracy and efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the inclined plate structure of this utility model; Figure 3 This is a schematic diagram of the negative pressure suction assembly of this utility model; Figure 4 This is a schematic diagram of the internal structure of the drum of this utility model; Figure 5 This is a cross-sectional view of the roller of this utility model.

[0017] In the picture: 1. Box body; 101. Feed inlet; 102. Receiving trough; 2. Inclined plate; 201. First air outlet; 3. Positive pressure blowing assembly; 301. Blowing trough; 4. Negative pressure suction assembly; 401. Suction trough; 402. Strip suction port; 403. Receiving box; 404. Negative pressure device; 5. Roller; 501. Rotating shaft; 502. Second air outlet; 503. Mounting hole; 6. Auxiliary blowing pipe; 601. Third air outlet; 7. Elastic block; 701. Elastic block body; 702. Spring. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] Example 1 To address the problem in traditional tea airflow grading equipment where tea leaves tend to pile up and stick together, preventing the airflow from evenly distributing to each leaf and resulting in uneven grading and incomplete separation, please refer to [link to relevant documentation]. Figures 1-3 The present invention provides a tea grading device, comprising: Box 1; Multiple inclined plates 2 are arranged in a stepped manner inside the box 1 to guide the tea leaves to slide along its surface; Multiple positive pressure blowing components 3 are located below the corresponding inclined plate 2 and are used to blow air upwards to separate light tea leaves; Multiple negative pressure suction components 4 are located above the corresponding inclined plates 2 to collect the separated light tea leaves; The inclined plate 2 has multiple sets of equally spaced first air outlets 201 in the area corresponding to the positive pressure blowing component 3. Multiple equally spaced rollers 5 are also rotatably mounted on the inclined plate 2. The rollers 5 and the first air outlets 201 are alternately arranged along the sliding direction of the tea leaves. The rollers 5 assist in dispersing the tea leaves to cooperate with the airflow for grading. During rotation, the rollers 5 generate mechanical disturbance to the tea leaves, effectively breaking up stacked or clumped tea leaves and improving the uniformity of material distribution. They also cause the tea leaves to flip. Specifically, when the tea leaves rotate to a certain angle with the rollers 5, they fall off the surface of the rollers 5 due to gravity. During this process, the tea leaves randomly flip, exposing different surfaces to the airflow area. This flipping effect helps eliminate grading deviations caused by one-sided airflow and improves the accuracy of airflow in identifying light and heavy components.

[0020] The top of the box 1 is provided with a feed inlet 101 to evenly convey the tea leaves to be graded. It needs to be used with a vibrating feeder to avoid accumulation. The bottom of the box 1 is provided with a receiving trough 102 to collect the heaviest tea leaves remaining after grading by the multi-stage inclined plates 2. The back of the box 1 is provided with a drive mechanism for driving the rollers 5 to rotate. Specifically, the drive mechanism includes a transmission motor fixed to the back of the box 1 and a synchronous transmission belt or sprocket assembly driven by the motor. The synchronous transmission belt is connected to the end of the rotating shaft 501 of each roller 5 to realize the synchronous rotation of multiple rollers 5.

[0021] The positive pressure blowing assembly 3 includes multiple blowing channels 301, which are connected to multiple sets of first air outlets 201 in a one-to-one correspondence. An air source device connected to the blowing channels 301 is provided on the back of the housing 1.

[0022] The negative pressure suction assembly 4 includes a suction trough 401, a receiving box 403 fixedly disposed on the outside of the housing 1 and connected to the suction trough 401, and a negative pressure device 404 fixedly disposed on the outside of the receiving box 403 and connected to the receiving box 403. The suction trough 401 has a plurality of strip-shaped suction ports 402 that correspond one-to-one with the blowing trough 301 on the side facing the inclined plate 2. Both the strip-shaped suction ports 402 and the blowing trough 301 are fitted with perforated air distribution plates to make the airflow evenly distributed. The perforated air distribution plates in the strip-shaped suction ports 402 have larger pore diameters so as not to affect the adsorption of tea leaves.

[0023] The tea leaves to be graded are evenly conveyed to the uppermost inclined plate 2 through the feed inlet 101. Under the action of gravity, they slide down the surface of the inclined plate 2. The airflow generated by the air source equipment is sprayed upward through the air duct 301 and the first air outlet 201, which forms a lifting force on the sliding tea leaves. Light tea leaves (such as broken tea and tender buds) are lifted by the airflow force, which is greater than the gravity, and are sucked into the receiving box 403 by the negative pressure suction component 4 above through the strip-shaped suction port 402 and the suction duct 401, completing the first level of grading. Heavy tea leaves (such as whole tea strips and tea stems) continue to slide along the inclined plate 2 and enter the next level stepped inclined plate 2, repeating the above process. Finally, the heaviest remaining tea leaves fall into the receiving trough 102. During the grading process, the roller 5 rotates under the drive mechanism, breaking up the stacked tea leaves and preventing the airflow from being unable to penetrate the stacked layer.

[0024] Example 2 Based on Example 1, in order to further improve the grading accuracy and efficiency, such as Figures 4-5 As shown, an auxiliary air blowing pipe 6 is installed inside the drum 5. The upper surface of the auxiliary air blowing pipe 6 has multiple evenly distributed third air outlets 601. The surface of the drum 5 has multiple evenly distributed second air outlets 502 along the circumference. The second air outlets 502 are periodically aligned with the third air outlets 601 to spray multi-directional auxiliary airflow onto the tea leaves to form a three-dimensional airflow field. Both ends of the drum 5 are fixed with hollow rotating shafts 501. The auxiliary air blowing pipe 6 is installed inside the rotating shafts 501 and fixed on the housing 1, and is connected to an external air source device.

[0025] The surface of the roller 5 is also provided with a plurality of evenly distributed elastic blocks 7 along the circumferential direction; the surface of the roller 5 is provided with mounting holes 503 for mounting the elastic blocks 7, and the mounting holes 503 are periodically aligned with the third air outlet 601 to drive the elastic blocks 7 to pop out and impact the tea leaves attached to the surface of the roller 5; the elastic block 7 includes an elastic block body 701 and a spring 702, one end of the spring 702 is fixedly installed in the mounting hole 503, and the other end is fixedly installed on the elastic block body 701, and the elastic block body 701 is movably installed in the mounting hole 503; the surface of the elastic block body 701 and the surface of the roller 5 are both provided with anti-slip texture.

[0026] The roller 5 is driven to rotate continuously by the drive mechanism on the back of the housing 1. The auxiliary air blowing pipe 6 inside the roller 5 remains fixed. The third air outlet 601 on it is periodically aligned with the second air outlet 502 on the surface of the roller 5 to achieve intermittent airflow. At the same time, when the mounting hole 503 rotates with the roller 5 to the position aligned with the third air outlet 601, the airflow enters the mounting hole 503 through the third air outlet 601, applying radial thrust to the elastic block body 701, overcoming the elastic force of the spring 702, and driving the elastic block body 701 to pop out a short distance. This popping action impacts and disturbs the tea leaves attached to or lingering on the surface of the roller 5, effectively peeling off the adhering material and preventing the tea leaves from accumulating or blocking the airflow channel. Subsequently, when the roller 5 continues to rotate and the mounting hole 503 is disengaged from the alignment position with the third air outlet 601, the airflow is interrupted, the spring 702 returns to its deformation, and the elastic block body 701 resets.

[0027] During the grading process, the auxiliary air pipe 6 inside the drum 5 continuously provides airflow. When the drum 5 rotates to the point where the second air outlet 502 and the third air outlet 601 are aligned, the airflow is sprayed out from the surface of the drum 5, forming a multi-directional auxiliary airflow, which enhances the disturbance effect and strengthens the separation effect. At the same time, the elastic block 7 is pushed out by the airflow as the mounting hole 503 is aligned with the third air outlet 601, impacting the tea leaves attached to the surface of the drum 5, actively breaking up the tea leaves and preventing them from sticking.

[0028] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A tea leaf grading apparatus, characterised in that, include: Box (1); Multiple inclined plates (2) are arranged in a stepped manner inside the box (1) to guide the tea leaves to slide along its surface; Multiple positive pressure blowing components (3) are disposed below the corresponding inclined plate (2) for blowing air upwards to separate light tea leaves; Multiple negative pressure suction components (4) are disposed above the inclined plate (2) to collect the separated light tea leaves; Among them, the inclined plate (2) has multiple sets of first air outlet holes (201) with equal spacing in the area corresponding to the positive pressure blowing component (3). The inclined plate (2) is also provided with multiple rollers (5) with equal spacing. The rollers (5) and the first air outlet holes (201) are arranged alternately along the sliding direction of the tea leaves. The rollers (5) are used to help disperse the tea leaves in order to cooperate with the airflow to achieve grading.

2. A tea grading apparatus according to claim 1, characterised in that, The top of the box (1) is provided with a feed inlet (101), and the bottom of the inside of the box (1) is provided with a receiving trough (102). The back of the housing (1) is provided with a drive mechanism for driving the roller (5) to rotate.

3. The tea grading device according to claim 1, characterized in that, The positive pressure blowing assembly (3) includes multiple blowing slots (301), each of which is connected to a set of first air outlets (201). The back of the housing (1) is provided with an air source device that is connected to the blowing slots (301).

4. A tea grading apparatus according to claim 3, characterised in that The negative pressure suction assembly (4) includes a suction trough (401), a receiving box (403) fixedly disposed on the outside of the box (1) and connected to the suction trough (401), and a negative pressure device (404) fixedly disposed on the outside of the receiving box (403) and connected to the receiving box (403). The suction slot (401) has multiple strip-shaped suction ports (402) that correspond one-to-one with the blowing slot (301) on the side facing the inclined plate (2). Both the strip-shaped suction ports (402) and the blowing slot (301) are fitted with perforated air distribution plates.

5. A tea grading apparatus as claimed in claim 1, wherein, An auxiliary air blowing pipe (6) is inserted inside the roller (5), and a plurality of evenly distributed third air outlet holes (601) are opened on the upper surface of the auxiliary air blowing pipe (6). The surface of the roller (5) is provided with a plurality of evenly distributed second air outlets (502) along the circumferential direction. The second air outlets (502) are periodically aligned with the third air outlets (601) to spray multi-directional auxiliary airflow onto the tea leaves.

6. A tea grading apparatus according to claim 5, characterised in that Both ends of the roller (5) are fixed with hollow rotating shafts (501). The auxiliary air blowing pipe (6) passes through the rotating shaft (501) and is fixed on the box (1), and is connected to the external air source equipment.

7. A tea grading apparatus as claimed in claim 5, wherein, The surface of the roller (5) is also provided with a plurality of evenly distributed elastic blocks (7) along the circumferential direction; The surface of the roller (5) is provided with mounting holes (503) for mounting elastic blocks (7). The mounting holes (503) are periodically aligned with the third air outlet (601) to drive the elastic blocks (7) to pop out and impact the tea leaves attached to the surface of the roller (5).

8. A tea grading apparatus according to claim 7, characterised in that The elastic block (7) includes an elastic block body (701) and a spring (702). One end of the spring (702) is fixed in the mounting hole (503), and the other end is fixed on the elastic block body (701). The elastic block body (701) is movably disposed in the mounting hole (503). The surfaces of the elastic block body (701) and the roller (5) are both provided with anti-slip textures.

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