Winnowing device for tea processing

Abstract

The utility model relates to a winnowing device for tea processing, which comprises a winnowing box, an air collecting cover is fixedly arranged in the winnowing box, and an air outlet of the air collecting cover faces upwards; the winnowing box comprises a feeding port, an exhaust port, a discharging channel and a slag discharging channel. The feeding port and the exhaust port are formed in the upper side of the air collecting cover and located at the two opposite ends of the air collecting cover, and the air collecting cover inclines towards the exhaust port. The discharging channel and the residue discharging channel are arranged at the end, provided with the air outlet, of the air collecting cover, the discharging channel is farther away from the air collecting cover, a partition plate with the top end higher than the air outlet is fixedly arranged between the discharging channel and the residue discharging channel, a ventilation net is fixedly arranged at the air outlet of the air collecting cover, and tea entering from the feeding port can fall on the ventilation net and be winnowed. According to the tea winnowing device, it can be effectively guaranteed that when the number of falling tea leaves is large, the tea leaves can be affected by wind power to form a parabola, the problem that the screening effect is affected due to the fact that the number of the falling tea leaves is large can be solved to a certain degree, and therefore the winnowing efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tea winnowing, in particular to a winnowing device for tea processing. Background Art

[0002] Tea winnowing is an important process in the tea refining process. It mainly uses the differences in the weight, volume, shape, and windward surface size of tea leaves to separate the heavy and light tea leaves and remove non-tea impurities under a certain wind force. Among them, the winnowing machine generates a stable air flow to make the tea leaves suspend and separate in the air flow, so as to achieve the purpose of grading and impurity removal. Tea winnowing is of great significance for improving tea quality and ensuring tea safety. Through winnowing, impurities and defective products in tea can be removed, and the purity and consistency of tea can be improved.

[0003] In the existing tea winnowing device, generally, during the process of evenly discharging tea leaves under the influence of gravity, a horizontal wind force is applied to achieve the winnowing purpose. In this way, the winnowing process can only be carried out when the tea leaves vertically fall in the horizontally arranged winnowing channel. The vertical height of the winnowing channel and the falling amount of tea leaves will directly affect the winnowing effect. This kind of winnowing equipment needs to make a choice on the falling amount of tea leaves. If the falling amount is too much, it may lead to excessive stacking of tea leaves, thus affecting the winnowing effect, while if the falling amount is less, it will affect the winnowing efficiency. For example, the tea winnowing equipment disclosed in the Chinese utility model patent CN202122277141.6 uses a material distribution structure to prevent excessive one-time feeding, which will inevitably affect the winnowing efficiency.

[0004] Therefore, limited by the falling amount of tea leaves, the winnowing efficiency of the existing tea winnowing device is relatively low. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a winnowing device for tea processing to solve the above problems existing in the prior art.

[0006] To solve the above problems, the utility model provides a winnowing device for tea processing, which includes a winnowing box. A wind collecting cover is fixedly arranged in the winnowing box, and the air outlet of the wind collecting cover faces upward. The winnowing box includes a feed inlet, an air outlet, a discharge channel, and a slag discharge channel. The feed inlet and the air outlet are arranged on the upper side of the wind collecting cover and are located at opposite ends of the wind collecting cover. The wind collecting cover is inclined towards the air outlet. The discharge channel and the slag discharge channel are arranged at one end of the wind collecting cover where the air outlet is located. Among them, the discharge channel is farther away from the wind collecting cover. A partition plate with a top height higher than the air outlet is fixedly arranged between the discharge channel and the slag discharge channel. A ventilation net is fixedly arranged at the air outlet of the wind collecting cover. The tea leaves entering from the feed inlet will fall onto the ventilation net and be winnowed.

[0007] The winnowing device for tea processing provided by the utility model also has the following technical features:

[0008] Further, the air separation box further includes an air inlet, and a filter screen is provided at the air inlet to provide clean air for the air collecting hood.

[0009] Further, the air separation box further includes an arc-shaped air plate, and the arc-shaped air plate guides the air blown out from the air outlet to the air discharge port.

[0010] Further, there is a drop between the feed inlet and the air outlet to prevent the air from escaping from the feed inlet due to the change in the direction of the air blowing the tea leaves.

[0011] Further, a fixing plate is provided at the top of the air collecting hood, and the fixing plate is fixedly connected to the air separation box, the air collecting hood, the partition plate, and the ventilation net respectively; the fixing plate receives the tea leaves entering from the feed inlet and sends them to the ventilation net.

[0012] Further, the inlet of the slag discharge channel is arranged between the fixing plate and the partition plate.

[0013] Further, the lengths of the feed inlet, the air discharge port, the discharge channel, the slag discharge channel, and the ventilation net in the width direction of the feed inlet are the same.

[0014] Further, the part of the partition plate higher than the air outlet is perpendicular to the ventilation net.

[0015] Further, the air collecting hood includes a frustum-shaped air collecting section and a cuboid-shaped air stabilizing section, and a fan is provided at the bottom end of the air collecting section.

[0016] Further, two fans are arranged side by side in the width direction of the feed inlet to increase the air separation amount.

[0017] The utility model has the following beneficial effects: Compared with the air separation device in which the tea leaves fall vertically and the air duct is arranged horizontally, by setting an inclined air collecting hood and a ventilation net at the air outlet of the air collecting hood in this device, before the tea leaves are blown by the wind to form a parabola, there is a certain buffer distance on the ventilation net, which can effectively ensure that when the number of falling tea leaves is large, the tea leaves can all be affected by the wind to form a parabola, and to a certain extent, solve the problem of affecting the screening effect caused by too much falling amount of tea leaves, thereby effectively improving the air separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 is Figure 1 the sectional view along line A-A of

[0020] Figure 3 is a schematic diagram of the overall structure of the air collecting hood of the utility model;

[0021] Figure 4 is an exploded schematic diagram of the structure of the air collecting hood of the utility model;

[0022] In the figure, the reference numerals are: the air separation box 1, the feed inlet 11, the air outlet 12, the discharge channel 13, the slag discharge channel 14, the air inlet 15, the arc-shaped air plate 16; the air collecting hood 2, the air outlet 21, the partition plate 22, the ventilation net 23, the fixing plate 24, the air collecting section 25, the air stabilizing section 26, the fan 27, the fan fixing frame 28, the through groove 29. Specific embodiments

[0023] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0024] As Figures 1 to 4 In the embodiment of the air separation device for tea processing of the present utility model shown in the figure, the air separation device for tea processing includes an air separation box 1. An air collecting hood 2 is fixedly arranged in the air separation box 1. The air outlet 21 of the air collecting hood 2 faces upward and is inclined. The wind blown out at the air outlet 21 directly blows the tea leaves upward, blowing the tea leaves into a parabola. According to the differences in the weight, volume, shape and windward surface size of the tea leaves, the distance of the parabola is also different, thereby completing the air separation.

[0025] Specifically, the air separation box 1 includes a feed inlet 11 and an air outlet 12; the feed inlet 11 and the air outlet 12 are arranged on the upper side of the air collecting hood 2 and are located at opposite ends of the air collecting hood 2. The air collecting hood 2 is inclined towards the air outlet 12; thus, after the tea leaves enter from the feed inlet 11, they will first fall to the upper end of the air collecting hood 2 and be blown into a parabola by the wind blown out from the air outlet 21 of the air collecting hood 2. Among them, the lighter yellow leaves, broken leaves, dust, etc. are blown out from the air outlet 12. Outside the feed inlet 11, feeding can be carried out through a feed funnel, a conveyor belt or a combination of the two.

[0026] The air separation box 1 further includes a discharge channel 13 and a slag discharge channel 14. The discharge channel 13 and the slag discharge channel 14 are arranged at one end of the air collecting hood 2 where the air outlet 12 is provided. Among them, the discharge channel 13 is farther away from the air collecting hood 2. A partition plate 22 with a top height higher than the air outlet 21 is fixedly arranged between the discharge channel 13 and the slag discharge channel 14; thus, when the tea leaves are blown into a parabola by the wind blown out from the air outlet 21, in addition to the lighter ones being blown out from the air outlet 12, the heavier sand, stones, tea stalks, etc. are blown to a lower height of the parabola and are blocked by the partition plate 22, so they fall into the slag discharge channel 14; while the tea leaves with appropriate weight, volume and shape cross the partition plate 22 due to the influence of the wind and enter the discharge channel 13, completing the air separation of the tea leaves.

[0027] In the figure, the slag discharge channel 14 is formed by using the partition plate 22 (specifically, the vertical part of the lower half of the partition plate 22) and the side wall of the installation cavity of the air collecting hood 2. Both the discharge channel 13 and the slag discharge channel 14 are vertically downward. Since the traffic volume of the slag discharge channel 14 is small and the mass of the passing substances is relatively high, the actual passing volume of the slag discharge channel 14 can be smaller than that of the discharge channel 13. Aggregate funnels can be provided at the bottom ends of the discharge channel 13 and the slag discharge channel 14 to facilitate the collection of the tea leaves and impurities after air separation. The aggregate funnels are arranged at the bottom of the air separation box 1. Of course, the discharge channel 13 and the slag discharge channel 14 may not adopt the vertically downward scheme. Specifically, after a certain distance at the vertically downward end, an inclined plate can be provided for discharging, and the discharge port is on the side wall of the air separation box 1.

[0028] Moreover, a ventilation net 23 is fixedly provided at the air outlet 21 of the air collecting hood 2. The tea leaves entering from the feed inlet 11 will fall onto the ventilation net 23 and be subjected to air separation. The ventilation net 23 is arranged as a mesh structure with small pores, and the unselected tea leaves cannot pass through the small pores. The ventilation net 23 is also inclined, and the ventilation net 23 does not change the direction of the wind force.

[0029] In this way, when the tea leaves entering from the feed inlet 11 fall onto the ventilation net 23, even if the tea leaves are stacked to a certain extent, the tea leaves can buffer for a certain distance on the ventilation net 23. During this period, they are first dispersed and then effectively blown by the wind force to form a parabola.

[0030] Therefore, compared with the vertical falling of tea leaves and the horizontal arrangement of the air duct, this buffer distance of the device on the ventilation net 23 can effectively ensure that when the number of falling tea leaves is large, the tea leaves can all be affected by the wind force to form a parabola, and to a certain extent, solve the problem of affecting the screening effect caused by too much falling amount of tea leaves, thereby effectively improving the air separation efficiency.

[0031] In an embodiment of the present application, preferably, the air separation box 1 further includes an air inlet 15, and a filter screen is provided at the air inlet 15 to provide clean air for the air collecting hood 2.

[0032] In an embodiment of the present application, preferably, the air separation box 1 further includes an arc-shaped air plate 16. The arc-shaped air plate 16 guides the air blown out from the air outlet 21 to the air discharge port 12, so that the air discharge port 12 can be horizontally arranged to prevent the lighter yellow leaves, broken leaves, dust, etc. from being blown up and then falling back again, and the air discharge port 12 can effectively take away the lighter yellow leaves, broken leaves, dust, etc.

[0033] In an embodiment of the present application, preferably, there is a drop between the feed inlet 11 and the air outlet 21 to prevent the wind from escaping from the feed inlet 11 due to blowing the tea leaves and changing direction; when the tea leaves at the feed inlet 11 fall onto the air-permeable net 23, the wind blows the tea leaves, which will change the direction of the wind to a certain extent. If there is no drop between the feed inlet 11 and the air outlet 21, these winds with changed directions will enter the feed inlet 11, thus disturbing the tea leaf feeding in the feed inlet 11.

[0034] In an embodiment of the present application, preferably, a fixing plate 24 is provided at the top of the air collecting hood 2, and the fixing plate 24 is fixedly connected to the air separation box 1, the air collecting hood 2, the partition plate 22, and the air-permeable net 23 respectively. In addition, the fixing plate 24 is also inclined, and the fixing plate 24 creates a certain lateral distance between the feed inlet 11 and the air-permeable net 23. Therefore, the fixing plate 24 can first receive the tea leaves entering from the feed inlet 11, and then the tea leaves will be sent to the air-permeable net 23 due to the inclined fixing plate 24. In this way, when the tea leaves fall onto the air-permeable net 23, they all enter from one side of the air-permeable net 23, avoiding falling from directly above the air-permeable net 23 and thus affecting the air outlet of the air-permeable net 23 and further affecting the air separation effect.

[0035] In an embodiment of the present application, preferably, the inlet of the slag discharge channel 14 is arranged between the fixing plate 24 and the partition plate 22, and specifically, it can be set as a through groove 29 provided at the end of the fixing plate 24. The two sides of the end of the fixing plate 24 are fixedly connected to the partition plate 22, and the through groove 29 in the middle penetrates the upper and lower end faces of the fixing plate 24 to serve as the inlet of the slag discharge channel 14.

[0036] In an embodiment of the present application, preferably, the lengths of the feed inlet 11, the air discharge port 12, the discharge channel 13, the slag discharge channel 14, and the air-permeable net 23 in the width direction of the feed inlet 11 are the same, so as to avoid the tea leaves being blown into a parabola by the air discharge port 12 and the tea leaves in the air being unable to enter the correct channel due to hitting the wall.

[0037] In an embodiment of the present application, preferably, the part of the partition plate 22 higher than the air outlet 21 is perpendicular to the air-permeable net 23, so as to avoid interference with the air outlet of the air outlet 21 when the height of the partition plate 22 is set too high.

[0038] In an embodiment of the present application, preferably, the air collecting hood 2 includes a wind collecting section 25 in the shape of a frustum of a pyramid and a wind stabilizing section 26 in the shape of a cuboid. A fan 27 is provided at the bottom end of the wind collecting section 25, and the fan 27 is fixedly installed at the bottom end of the wind collecting section 25 through a fan fixing frame 28; the wind blown by the fan 27 is concentrated by the wind collecting section 25 to the wind stabilizing section 26, and the wind stabilizing section 26 blows the wind stably towards the air outlet 21.

[0039] In one embodiment of the present application, preferably, two blowers 27 are arranged side by side in the width direction of the feed inlet 11 to increase the amount of air separation; the blowers 27 arranged side by side increase the overall width of the air collecting hood 2, and correspondingly, the widths of the feed inlet 11, the air outlet 12, the discharge channel 13, the slag discharge channel 14, and the ventilation net 23 increase accordingly. Therefore, more tea leaves can be put above the air collecting hood 2 for air separation, and thus the amount of risk can be effectively increased; of course, three or more blowers 27 can also be arranged side by side, and can be arranged according to the actual production needs.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An air separation device for tea processing, characterized in that, It includes a pneumatic separation box (1), inside which a wind collecting hood (2) is fixedly arranged, and the air outlet (21) of the wind collecting hood (2) faces upward; the pneumatic separation box (1) includes a feed inlet (11), an air exhaust outlet (12), a discharge channel (13) and a slag discharge channel (14); the feed inlet (11) and the air exhaust outlet (12) are arranged on the upper side of the wind collecting hood (2) and at opposite ends of the wind collecting hood (2), and the wind collecting hood (2) is inclined towards the air exhaust outlet (12); the discharge channel (13) and the slag discharge channel (14) are arranged at one end of the wind collecting hood (2) where the air exhaust outlet (12) is provided, wherein the discharge channel (13) is farther from the wind collecting hood (2), and a partition plate (22) with a top height higher than the air outlet (21) is fixedly arranged between the discharge channel (13) and the slag discharge channel (14), and a ventilation net (23) is fixedly arranged at the air outlet (21) of the wind collecting hood (2), and the tea leaves entering from the feed inlet (11) will fall onto the ventilation net (23) and be pneumatically separated.

2. The air separation device for tea processing according to claim 1, characterized in that, The pneumatic separation box (1) further includes an air inlet (15), and a filter screen is provided at the air inlet (15) to provide clean air for the wind collecting hood (2).

3. The air separation device for tea processing according to claim 1, characterized in that, The pneumatic separation box (1) further includes an arc-shaped wind plate (16), and the arc-shaped wind plate (16) guides the air blown out from the air outlet (21) to the air exhaust outlet (12).

4. The air separation device for tea processing according to claim 1, characterized in that, There is a drop between the feed inlet (11) and the air outlet (21) to prevent the wind from escaping from the feed inlet (11) due to changing the direction by blowing the tea leaves.

5. The air separation device for tea processing according to claim 1, wherein A fixing plate (24) is provided at the top of the wind collecting hood (2), and the fixing plate (24) is fixedly connected to the pneumatic separation box (1), the wind collecting hood (2), the partition plate (22) and the ventilation net (23) respectively; the fixing plate (24) receives the tea leaves entering from the feed inlet (11) and sends them onto the ventilation net (23).

6. The air separation device for tea processing according to claim 5, characterized in that, The inlet of the slag discharge channel (14) is arranged between the fixing plate (24) and the partition plate (22).

7. The air separation device for tea processing according to claim 1, wherein, The lengths of the feed inlet (11), the air exhaust outlet (12), the discharge channel (13), the slag discharge channel (14) and the ventilation net (23) in the width direction of the feed inlet (11) are the same.

8. The air separation device for tea processing according to claim 1, characterized in that, The part of the partition plate (22) higher than the air outlet (21) is perpendicular to the ventilation net (23).

9. The winnowing device for tea processing according to claim 1, characterized in that, The wind collecting hood (2) includes a frustum-shaped wind collecting section (25) and a cuboid-shaped wind stabilizing section (26), and a fan (27) is provided at the bottom end of the wind collecting section (25).

10. The air separation device for tea processing according to claim 9, characterized in that, Two fans (27) are arranged side by side in the width direction of the feed inlet (11) to increase the pneumatic separation amount.

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