Automatic withering machine for black tea

Abstract

The invention relates to a withering machine, and discloses an automatic black tea withering machine which comprises a case (1), a paving chamber (11) and a fan chamber (12) are arranged in the case (1), multiple layers of paving trays (101) are arranged in the paving chamber (11), an air heater (120) is arranged in the fan chamber (12), and the multiple layers of paving trays (101) can rotate to a horizontal position and a blowing position towards the air heater (120). When the multiple layers of paving trays (101) rotate to the air blowing position, the highest point of the paving tray (101) on the lower layer is lower than the lowest point of the paving tray (101) on the upper layer, the highest point of the paving tray (101) on the uppermost layer is lower than the highest point of the heating assembly (202), and the lowest point of the paving tray (101) on the lowermost layer is higher than the lowest point of the heating assembly (202). According to the tea withering device disclosed by the invention, tea leaves can be uniformly blown and heated in a manner that the spreading disc (101) can incline towards the hot-air blower (120), so that the withering uniformity is effectively improved, and the tea leaf quality is further improved.

Description

Technical Field

[0001] The invention relates to a withering machine, in particular to an automatic black tea withering machine. Background Art

[0002] The processing process of black tea generally includes steps such as withering, rolling, fermentation, and drying. Among them, withering is divided into natural withering and machine withering. Natural withering is to spread the picked fresh leaves and dry them in the sun until they are dark green in color. Machine withering is generally automated through a withering machine, which relies on a hot air blower to air-dry the tea leaves.

[0003] In factory operations, in order to further speed up the withering efficiency, multi-layer spreading trays are generally set up in the withering machine for spreading, and the tea leaves on the multi-layer spreading trays are blown with air by a hot air blower. Although this process can ensure the efficient withering of tea leaves, since the hot air blower is generally located on one side of the spreading tray or at the bottom of the lowest spreading tray, there will be problems such as uneven blowing and heating of the tea leaves, which will lead to uneven withering and then affect the quality of the tea leaves. Summary of the invention

[0004] The invention aims at the problems existing in the black tea withering process in the prior art and provides an automatic black tea withering machine.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions: An automatic black tea withering machine comprises a chassis, a spreading chamber and a fan chamber arranged adjacent to the spreading chamber on the left and right sides thereof are arranged in the chassis, the spreading chamber is provided with a plurality of spreading plates arranged in the height direction of the chassis for spreading tea leaves, the fan chamber is provided with a hot air blower for blowing air to the tea leaves on the spreading plates, the hot air blower comprises a fan and a heating assembly arranged in the height direction of the chassis, The multi-layer paving plates can all be rotated to a horizontal position and a blowing position facing the hot air blower. When the multi-layer paving plates are rotated to the blowing position, the highest point of the lower paving plate is lower than the lowest point of the upper paving plate and the highest point of the uppermost paving plate is lower than the highest point of the heating component, and the lowest point of the lowermost paving plate is higher than the lowest point of the heating component.

[0006] Preferably, a rotating shaft rotatably connected to the side wall of the paving chamber is provided on the outer side surface of the paving disc, the rotating shaft is radially arranged along the paving disc, and also includes a first driving mechanism for driving the rotating shaft to rotate toward the hot air blower, the first driving mechanism includes a first gear arranged on the rotating shaft, a rack longitudinally arranged on the side wall of the paving chamber and capable of moving up and down, the first gears on all paving discs are meshed with the rack, and also includes a first driving motor connected to the rotating shaft of one of the paving discs. The design of the rack and the first gear can make multiple paving discs tilt synchronously, maintain the same tilt angle, and then achieve the same heating, ensuring the uniformity of withering of the same batch of tea leaves.

[0007] Preferably, the paving disc includes a paving plate and an annular sleeve coaxially arranged outside the paving plate, the rotating shaft is installed on the outer wall of the annular sleeve, the paving plate includes a circular mesh plate and an annular retaining edge arranged at the edge of the circular mesh plate, the multi-layer paving disc is coaxially arranged and the paving plate can rotate around the axis in the annular sleeve. The structural design of the paving disc enables it to realize self-rotation, and then the tea leaves at each position in the paving disc can be evenly exposed to wind and heat.

[0008] Preferably, it also includes a second driving mechanism for driving the paving board to rotate, the second driving mechanism includes a second gear arranged in the annular sleeve and a second driving motor for driving the second gear to rotate, and a gear ring meshing with the second gear is provided on the outer side surface of the annular baffle.

[0009] Preferably, a tea limiting plate is coaxially arranged at the upper end of the spreading plate, and the tea limiting plate comprises an outer annular frame and a woven net composed of woven ropes arranged in the outer annular frame, and the woven net can move in the spreading plate along the axial direction of the spreading plate toward or away from the spreading board. The setting of the tea limiting plate can effectively prevent the tea from piling up toward the inclined side during the tilting of the spreading plate, and play an effective role in limiting the tea.

[0010] Preferably, the upper end of the outer side of the annular retaining edge is provided with an external thread, and the annular frame is threadedly connected to the annular retaining edge. The relative distance between the annular retaining edge and the annular frame is adjusted by threaded connection, which is simple and convenient to operate.

[0011] Preferably, an air vent is formed in the middle of the spreading plate, an inner baffle is provided at the edge of the air vent, an inner annular frame is provided in the middle of the woven net, and the inner annular frame can slide up and down along the outer wall of the inner baffle. The provision of the air vent can make the airflow in the spreading room act on the tea leaves on the spreading plate more efficiently, effectively improving the airflow utilization rate.

[0012] Preferably, a horizontally arranged limit ring is provided in the middle of the outer side surface of the annular baffle, the annular sleeve includes an upper end plate and a lower end plate, the inner diameter of the lower end plate is smaller than that of the upper end plate, and the limit ring abuts against the upper surface of the upper end plate when the paving disc is installed in the annular sleeve from top to bottom and the bottom surface of the paving disc abuts against the upper surface of the lower end plate. The structural form of the limit ring and the annular sleeve can ensure the convenience and stability of installation between the annular sleeve and the paving disc.

[0013] The present invention has significant technical effects due to the adoption of the above technical solution: The present invention realizes more uniform blowing and heating of tea leaves by arranging a spreading plate in a manner that the spreading plate can be tilted toward the hot air blower, thereby effectively improving the withering uniformity and further improving the quality of tea leaves. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a structural diagram of embodiment 1 of the present invention.

[0015] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle paving chamber.

[0016] Figure 3 yes Figure 1 Schematic diagram of the structure of the stroke room.

[0017] Figure 4 yes Figure 2 Schematic diagram of the structure of the middle spreading plate.

[0018] Figure 5 yes Figure 4 Schematic diagram of half section of the middle spreading plate. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] Example 1 A black tea automatic withering machine, such as Figure 1-Figure 5 As shown, it comprises a chassis 1, wherein a spreading chamber 11 and a fan chamber 12 arranged adjacent to the spreading chamber 11 on the left and right are arranged in the chassis 1, wherein the spreading chamber 11 is provided with a plurality of spreading plates 101 arranged in the height direction of the chassis 1 for spreading tea leaves, wherein the fan chamber 12 is provided with a hot air blower 120 for blowing air on the tea leaves on the spreading plates 101, wherein the hot air blower (120) comprises a fan 201 and a heating assembly 202 arranged in the height direction of the chassis 1, The multi-layer paving disc 101 can all be rotated to a horizontal position and a blowing position facing the hot air blower 120. When the multi-layer paving disc 101 is rotated to the blowing position, the highest point of the lower paving disc 101 is lower than the lowest point of the upper paving disc 101, and the highest point of the uppermost paving disc 101 is lower than the highest point of the heating component 202, and the lowest point of the lowermost paving disc 101 is higher than the lowest point of the heating component 202.

[0021] The heating component 202 in this embodiment is a plurality of electric heating tubes arranged side by side. Adjacent electric heating tubes are on the same vertical plane and together constitute a heating surface. The wind blown out by the fan 201 can pass through the heating surface to realize the hot air blowing into the paving chamber 11. A temperature sensor can also be arranged in the withering machine to control the heating temperature and heating time to ensure that the hot air blown out can meet the required withering temperature.

[0022] During the operation, the freshly picked tea leaves are evenly spread on each layer of the spreading tray 101. After spreading, the spreading tray 101 is rotated to tilt toward the hot air blower 120. Since the spacing between the upper and lower spreading trays 101 is sufficient, the entire spreading tray 101 can be blown by wind whether it is close to the hot air blower 120 end or far away from the hot air blower 120 end after the inclination angle is well controlled. Compared with the horizontally placed spreading tray 101, when blowing from the side, it can only directly blow to the tea leaves in the spreading tray 101 close to the hot air blower 120 end. This method of tilting the spreading tray 101 toward the hot air blower 120 can make the tea leaves heated more evenly.

[0023] In order to realize the rotation of the paving disc 101, a rotating shaft 102 rotatably connected to the side wall of the paving chamber 11 is provided on the outer side surface of the paving disc 101. The rotating shaft 102 is arranged radially along the paving disc 101, and also includes a first driving mechanism for driving the rotating shaft 102 to rotate toward the hot air blower 120. The first driving mechanism includes a first gear 103 arranged on the rotating shaft 102, and a rack 104 longitudinally arranged on the side wall of the paving chamber 11 and capable of moving up and down. The first gears 103 on all the paving discs 101 are meshed with the rack 104, and also include a first driving motor 105 connected to the rotating shaft 102 of one of the paving discs 101.

[0024] Since the first gears 103 on all the paving discs 101 are connected to the rack 104, when the first drive motor 105 drives one of the first gears 103 to rotate, it can drive the rack 104 to move up and down. The movement of the rack 104 can drive the first gears 103 on other paving discs 101 meshing with it to rotate, thereby realizing the synchronous rotation of other paving discs 101.

[0025] In the present embodiment, an installation cavity for installing the rack 104 is provided on the side wall of the paving chamber 11, and a longitudinal slide groove is provided in the installation cavity for guiding the rack 104. The rack 104 slides up and down along the slide groove under the action of the first gear 103, and then drives the first gears 103 on different layers of paving discs 101 to rotate, thereby realizing the tilting rotation of the multi-layer paving discs 101.

[0026] In this embodiment, the paving disc 101 includes a paving plate 106 and an annular sleeve 107 coaxially arranged on the outside of the paving plate 106, the rotating shaft 102 is installed on the outer wall of the annular sleeve 107, the paving plate 106 includes a circular mesh plate 108 and an annular baffle 109 arranged at the edge of the circular mesh plate 108, the multi-layer paving disc 101 is coaxially arranged and the paving plate 106 can rotate around the axis in the annular sleeve 107.

[0027] It also includes a second driving mechanism for driving the paving board 106 to rotate, the second driving mechanism includes a second gear 110 arranged in the annular sleeve 107 and a second driving motor for driving the second gear 110 to rotate, and a gear ring meshing with the second gear 110 is provided on the outer surface of the annular baffle 109.

[0028] Since the spreading tray 101 is only set at an angle, although the hot air can be blown directly onto the entire spreading tray 101, since the distance between each position on the spreading tray 101 and the hot air blower 120 is different, the temperature at the position closer to the hot air blower 120 is higher, and there will still be a problem of uneven heating. Therefore, the spreading tray 101 is designed to rotate around the axis, so that the distance between the tea leaves at different positions and the hot air blower 120 can be cycled and alternate, thereby further ensuring the uniform heating of the tea leaves at each position on the spreading tray 101.

[0029] In addition, in this embodiment, a tea limiting plate 111 is coaxially provided at the upper end of the spreading plate 101. The tea limiting plate 111 includes an outer annular frame 112 and a woven mesh 113 composed of woven ropes arranged in the outer annular frame 112. The woven mesh 113 can move in the spreading plate 101 along the axial direction of the spreading plate 101 toward or away from the spreading plate 106.

[0030] In order to realize the up and down movement of the woven mesh 113, an external thread is provided at the upper end of the outer side surface of the annular guard edge 109, and the annular frame is threadedly connected to the annular guard edge 109. The relative distance between the two is adjusted by the rotational movement of the annular frame on the annular guard edge 109, thereby driving the woven mesh 113 toward or away from the paving board 106.

[0031] Of course, other methods can also be used to achieve the up and down movement of the woven mesh 113, such as setting an upward opening longitudinal slide groove on the annular baffle 109, and connecting multiple vertically arranged horizontal slide grooves transversely on the longitudinal slide groove, and setting a slider on the inner side of the annular frame that slides downward from the upper end of the longitudinal slide groove, and then rotating the annular frame at the horizontal slide groove, and limiting the position of the slider by the horizontal slide grooves at different positions. This adjustment method is simple and convenient to operate, and also has the characteristics of simple processing.

[0032] The woven net 113 can press down the tea leaves spread on the spreading plate 101. The pressing process does not require excessive pressing, and it is only necessary to prevent the tea leaves from piling up in the tilting direction when the spreading plate 101 is tilted. The woven net 113 is made of woven ropes, which have a certain elasticity and will not damage the tea leaves.

[0033] During the withering process, the tea leaves need to be turned over so that the tea leaves inside and outside can be better blown by air. At this time, you only need to move the woven net 113 to a position at a certain distance from the tea leaves. The tea leaves can be automatically turned over under the action of the tilting and rotation of the spreading plate 101.

[0034] In the present embodiment, in order to enable the airflow to act on the tea leaves on the spreading plate 101 better and for a longer period of time, an air outlet 114 is formed in the middle of the spreading plate 101, an inner retaining edge 115 is provided at the edge of the air outlet 114, and an inner annular frame 116 is provided in the middle of the woven mesh 113, and the inner annular frame 116 can slide up and down along the outer wall of the inner retaining edge 115.

[0035] The wind blown by the hot air blower 120 onto the paving plate 101 will not flow out directly along the blower, but will partially flow back through the air outlet 114 and then act on the paving plate 101 again, so that the gas in the paving chamber 11 can be recycled to achieve more efficient withering.

[0036] In addition, in order to ensure the convenience and stability of installation between the annular sleeve 107 and the paving plate 106, a horizontally arranged limit ring 117 is provided in the middle of the outer side surface of the annular guard edge 109. The annular sleeve 107 includes an upper end plate 118 and a lower end plate 119. The inner diameter of the lower end plate 119 is smaller than that of the upper end plate 118. The paving disc 101 is installed in the annular sleeve 107 from top to bottom and when the bottom surface of the paving disc 101 is against the upper surface of the lower end plate 119, the limit ring 117 is against the upper surface of the upper end plate 118.

[0037] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0038] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. An automatic black tea withering machine, comprising a chassis (1), wherein a spreading chamber (11) and a fan chamber (12) are arranged adjacent to the spreading chamber (11) on the left and right sides thereof, wherein the spreading chamber (11) is provided with a plurality of spreading plates (101) arranged in a height direction of the chassis (1) for spreading tea leaves, and wherein a hot air blower (120) is arranged in the fan chamber (12) for blowing air to the tea leaves on the spreading plates (101), wherein the hot air blower (120) is provided for blowing air to the tea leaves on the spreading plates (101), wherein the hot air blower (120) is provided for blowing air to the tea leaves on the spreading plates (101), wherein the hot air blower (120) is provided for blowing air to the tea leaves on the spreading plates (101), and ... The hot air blower (120) comprises a fan (201) and a heating component (202) arranged along the height direction of the chassis (1). The multi-layer paving disc (101) can all be rotated to a horizontal position and a blowing position facing the hot air blower (120); when the multi-layer paving disc (101) is rotated to the blowing position, the highest point of the lower paving disc (101) is lower than the lowest point of the upper paving disc (101), the highest point of the uppermost paving disc (101) is lower than the highest point of the heating component (202), and the lowest point of the lowermost paving disc (101) is higher than the lowest point of the heating component (202).

2. The automatic black tea withering machine according to claim 1, characterized in that: A rotating shaft (102) rotatably connected to a side wall of the paving chamber (11) is provided on the outer side surface of each paving disc (101); the rotating shaft (102) is arranged radially along the paving disc (101), and further comprises a first driving mechanism for driving the rotating shaft (102) to rotate toward the hot air blower (120); the first driving mechanism comprises a first gear (103) arranged on the rotating shaft (102), and a rack (104) longitudinally arranged on the side wall of the paving chamber (11) and capable of moving up and down; the first gears (103) on all the paving discs (101) are meshed with the rack (104), and further comprises a first driving motor (105) connected to the rotating shaft (102) of one of the paving discs (101).

3. The automatic black tea withering machine according to claim 2, characterized in that: The paving disc (101) comprises a paving plate (106) and an annular sleeve (107) coaxially arranged outside the paving plate (106); the rotating shaft (102) is installed on the outer wall of the annular sleeve (107); the paving plate (106) comprises a circular mesh plate (108) and an annular retaining edge (109) arranged at the edge of the circular mesh plate (108); the multi-layer paving disc (101) is coaxially arranged and the paving plate (106) can rotate around the axis in the annular sleeve (107).

4. The automatic black tea withering machine according to claim 3, characterized in that: It also includes a second driving mechanism for driving the paving board (106) to rotate, the second driving mechanism including a second gear (110) arranged in the annular sleeve (107) and a second driving motor for driving the second gear (110) to rotate, and a gear ring meshing with the second gear (110) is provided on the outer side surface of the annular retaining edge (109).

5. The automatic black tea withering machine according to claim 3, characterized in that: A tea leaf limiting plate (111) is coaxially disposed at the upper end of the spreading plate (101), the tea leaf limiting plate (111) comprising an outer annular frame (112) and a woven net (113) composed of woven ropes disposed within the outer annular frame (112), the woven net (113) being able to move within the spreading plate (101) along the axial direction of the spreading plate (101) toward or away from the spreading plate (106).

6. The automatic black tea withering machine according to claim 5, characterized in that: An upper end portion of the outer side surface of the annular retaining edge (109) is provided with an external thread, and the outer annular frame (112) is threadedly connected to the annular retaining edge (109).

7. The automatic black tea withering machine according to claim 5, characterized in that: An air vent (114) is formed in the middle of the paving plate (101), an inner retaining edge (115) is provided at the edge of the air vent (114), an inner annular frame (116) is provided in the middle of the woven mesh (113), and the inner annular frame (116) can slide up and down along the outer wall of the inner retaining edge (115).

8. The automatic black tea withering machine according to claim 3, characterized in that: A horizontally arranged limit ring (117) is provided at the middle portion of the outer side surface of the annular retaining edge (109); the annular sleeve (107) comprises an upper end plate (118) and a lower end plate (119); the inner diameter of the lower end plate (119) is smaller than that of the upper end plate (118); the paving disc (101) is installed in the annular sleeve (107) from top to bottom and when the bottom surface of the paving disc (101) abuts against the upper surface of the lower end plate (119), the limit ring (117) abuts against the upper surface of the upper end plate (118).

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