Negative pressure tea-leaf picker and tea-leaf picking method

Abstract

The invention discloses a negative-pressure tea-leaf picker and a tea-leaf picking method. The negative-pressure tea-leaf picker comprises a frame body, the air duct is obliquely arranged on the frame body and is used for transporting the sheared tea leaves; the shearing tool is arranged at the lower end of one side, close to the advancing direction of the frame body, of the air duct; an adsorption opening for adsorbing tea leaves is formed in the lower end of the air duct; an air blowing opening is formed in the lower end of one side, far away from the advancing direction of the frame body, of the air duct and is connected with a fan through an air pipe; the air blowing opening comprises an adjusting plate arranged on the side close to the adsorption opening, the adjusting plate is rotationally arranged on the air channel, and the adsorption force at the adsorption opening is adjusted by adjusting the inclination angle between the adjusting plate and the air channel. According to the tea picking machine, the cut tea leaves are adsorbed and conveyed by forming negative pressure at the adsorption opening, the effectiveness of adsorbing and collecting the cut tea leaves is improved, and waste and loss caused by the fact that the tea leaves fall out of an air duct are prevented.

Description

Technical Field

[0001] The invention relates to the technical field of tea plucking machines, in particular to a negative pressure tea plucking machine and a tea plucking method. Background Art

[0002] A tea plucker is a machine for harvesting tea leaves. Existing tea pluckers include handheld and walking types. During use, walking type tea pluckers are widely praised in the market for their high tea picking efficiency. Walking type tea pluckers are usually equipped with a transverse reciprocating shearing tool, and the tea leaves cut by the tool are blown into the air duct by blowing air, and then enter the collection unit through the guidance of the air duct to complete the collection of the tea leaves.

[0003] The tea leaves cut by the tea picking machine are transported and collected by a fan. In this process, the following problems have not been effectively solved: 1. When the blower mechanism blows the cut tea leaves through the air, it is very easy to blow the tea leaves off or out of the air duct, resulting in the waste of tea leaves when harvesting. Moreover, after arranging multiple air outlets, the tea leaves are very likely to form a vortex state and spin in the air duct, affecting the efficiency of transportation. 2. When the reciprocating cutter is shearing the tea leaves, tea leaves are likely to remain on the cutter, causing the tea leaves to fall off during movement, resulting in waste of tea leaves during harvesting. Summary of the invention

[0004] Aiming at the deficiencies in the prior art, the present invention provides a negative pressure tea picking machine and a tea picking method.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions: a negative pressure tea picking machine, comprising Frame; An air duct is obliquely arranged on the frame and is used to transport the cut tea leaves; and A shearing tool is arranged at the lower end of the air duct close to the traveling direction of the frame; The lower end of the air duct is provided with an adsorption port for adsorbing tea leaves; The lower end of the air duct away from the direction of travel of the frame is provided with an air outlet, and the air outlet is connected to the fan through an air duct; The blowing port blows air into the air duct, and an air pressure difference is generated between the blowing port and the adsorption port, so that a negative pressure is formed at the adsorption port to achieve adsorption of tea leaves; The air blowing port comprises an adjusting plate arranged at a side close to the adsorption port, and the adjusting plate is rotatably arranged on the air duct, and the adsorption force at the adsorption port is adjusted by adjusting the inclination angle between the adjusting plate and the air duct.

[0006] In the above scheme, preferably, an adjustment plate is provided on one side of the air outlet, and a guide plate connected to the inner wall of the air duct is provided on the other side, and the air blown out of the air outlet is guided into the air duct through the guide plate; The upper end of the adjustment plate is higher than the lower end of the guide plate.

[0007] In the above solution, preferably, the adjustment plate is rotatably arranged at the bottom of the air duct through an adjustment shaft, and an elastic reset member is arranged between the adjustment shaft and the air duct.

[0008] In the above scheme, preferably, the air duct and the air pipe are fixedly connected as one, and a plurality of partitions are provided in the air duct.

[0009] In the above scheme, preferably, the shearing tool comprises an upper blade and a lower blade, and an air blowing unit is telescopically arranged below the shearing tool, and the air blowing unit comprises a sliding frame and a plurality of air blowing pipes arranged on the sliding frame; The sliding frame cooperates with the upper blade or the lower blade through a first cable.

[0010] In the above scheme, preferably, a plurality of guide rods are provided on the sliding frame, the guide rods are slidably arranged on the air duct, and a return spring is arranged between the sliding frame and the air duct.

[0011] In the above scheme, preferably, the air blowing pipe is arranged perpendicularly to the shearing tool, or the air blowing pipe is arranged inclined toward one side of the air duct.

[0012] In the above scheme, preferably, the air duct is provided with an air outlet connected to the air blowing pipe, and a flip plate is rotatably provided in the air outlet to realize the opening and closing of the air outlet and the air duct, and the flip plate is connected to the sliding frame through a second cable.

[0013] In the above scheme, preferably, a synchronous pull rope is provided between the flip plate and the adjustment plate, and a pull rope guide plate cooperating with the synchronous pull rope is provided in the air duct.

[0014] In the above scheme, preferably, a tea picking method using a negative pressure tea picking machine is as follows: S1: The shearing tool shears the tea leaves, and the sheared tea leaves are placed above the tool. The air outlet blows high-speed air into the air duct, and an air pressure difference is generated between the air outlet and the suction port, so that a negative pressure is formed at the suction port. The sheared tea leaves are sucked by the suction port and placed at the air outlet; S2: When the tea leaves are close to the air outlet, they are quickly blown into the air duct by the high-speed airflow from the air outlet and transported along the guide plate; S3: After the tea leaves are blown into the air duct by the high-speed wind flow, they are transported along the air duct to the storage mechanism at the end of the air duct to achieve tea leaves harvesting; S4: The regulating plate changes the pressure difference between the blowing port and the suction port by adjusting the size of the blowing port, thereby changing the suction force of the suction port and also changing the wind speed at the blowing port.

[0015] The beneficial effects of the present invention are as follows: the present invention provides a tea picking machine that absorbs and transfers the sheared tea leaves by forming a negative pressure at the adsorption port, thereby improving the effectiveness of adsorption and collection of the sheared tea leaves and preventing the tea leaves from falling outside the air duct to cause waste and loss; At the same time, by arranging inclined guide plates along the air duct, the transmission of tea leaves in the air duct is made more stable and rapid, and the tea leaves are transmitted in a more stable manner by adhering to the guide plates and the air duct walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the installation position of the air duct and the frame of the present invention.

[0017] Figure 2 It is a schematic diagram of the front view structure of the air duct of the present invention.

[0018] Figure 3 It is a schematic diagram of the side structure of the air duct of the present invention.

[0019] Figure 4 For the present invention Figure 3 Enlarged structural diagram at A in the middle.

[0020] Figure 5 It is a schematic diagram of the internal structure of the air duct of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Figure 1-Figure 5 .

[0022] A negative pressure tea picking machine comprises a frame 1, an air duct 2 and a shearing tool 3. A powered walking component is provided at the bottom of the frame 1 for the movement of the tea picking machine. The frame 1 adopts a gantry frame, and the air duct 2 is located in the middle of the frame 1. When the tea picking machine is moving, the tea trees are located in the middle area of ​​the frame 1, and the frame 1 spans the tea trees. The shearing tool 3 is provided at the lower end of the air duct 2, and is located at the lower end of the air duct 2 on the side close to the moving direction of the frame 1.

[0023] like Figure 1 As shown, the air duct 2 is tilted on the frame 1, and the tilt angle of the air duct 2 to the vertical point is 8°, and its tilt direction is from the side of the frame 1 moving in the direction from bottom to top to the side away from the frame 1 moving in the direction; the shearing end of the shearing tool 3 is located at the front end of the air duct 2, as shown in FIG. Figure 1-Figure 3As shown; the air duct 2 is provided with an adsorption port 201 which cooperates with the shearing tool 3 , and the adsorption port 201 is communicated with the inner cavity of the air duct 2 , and the tea leaves sheared by the shearing tool 3 are adsorbed by the adsorption port 201 into the air duct 2 .

[0024] The lower end of the air duct 2 is connected to the shearing tool 3, and the upper end is connected to the storage mechanism. The tea leaves are transported through the air duct 2 and collected by the storage mechanism. Figure 3 As shown, a blowing port 202 is provided at the bottom of the air duct 2 away from the traveling direction of the frame 1 , and the blowing port 202 is connected to the fan through an air duct 203 , and the fan blows high-pressure air into the air duct 203 and blows it out from the blowing port 202 .

[0025] like Figure 3 As shown, the blowing outlet 202 includes an adjusting plate 204 arranged on the right and a guide plate 205 arranged on the left. The guide plate 204 is arranged at an angle, and a first channel for airflow to pass through is arranged at its lower end and the bottom of the air duct 2, and the upper end is inclined to the left and fixed to the left wall of the air duct 2; the blowing outlet 202 is formed between the guide plate 205 and the adjusting plate 204, and when the blowing outlet 202 discharges air, the air pressure difference between the blowing outlet 202 and the suction port 201 is generated, so that a negative pressure area is formed in the area close to the suction port 201, so that the tea leaves are adsorbed by the negative pressure area when they are close to the suction port 201 after being cut.

[0026] like Figure 3-Figure 4 As shown, the upper end of the adjustment plate 204 is higher than the lower end of the guide plate 205, and the flow direction of the airflow at the air outlet 202 after passing through the air duct 203 is shown as "→" in the figure; in the initial state, the adjustment plate 204 is preferably inclined at an angle of 5° to the vertical direction, and the guide plate 205 is inclined at an angle of 30° to the vertical direction, that is, Figure 4 As shown in; the wind flow blown out of the blowing port 202 flows along the guide plate surface through the guide plate 205, so that the tea leaves entering the air duct 2 can be transported in contact with the wall of the guide plate 205, thereby improving the stability of the tea leaves transported in the air duct 2.

[0027] The adjustment plate 204 is rotatably set on the bottom wall of the air duct 2. Preferably, the air duct 203 is installed at the bottom of the air duct 2. After the air duct 203 is installed, the bottom of the air duct 2 can be formed into an integrated body. The adjustment plate 204 can be installed on the wall at the bottom of the air duct 2 during installation. The lower end of the adjustment plate 204 is rotatably connected to the bottom wall of the air duct 2 through the adjustment shaft 206, and an elastic reset member is arranged between the adjustment shaft 206 and the air duct 2. The elastic reset member can adopt a reset structure such as a shaft torsion spring. The setting of structures such as torsion springs is a conventional technical means for technicians in this field and will not be elaborated here. The adsorption force at the adsorption port 201 and the flow rate of the wind at the blowing port 202 are adjusted by adjusting the inclination angle between the adjustment plate 204 and the air duct 2, that is, the flow rate and flow rate change adaptively after the cross-section of the blowing port 202 changes.

[0028] like Figure 5 As shown, a plurality of partitions 207 are provided in the air duct 203, and an air inlet is provided at the upper end of the air duct 203, which is connected to the fan through a hose. Wind enters the air duct 203 from the air inlets on both sides, and is evenly blown out from the air outlet 202 through the partition guidance of the partition 207.

[0029] In order to blow tea leaves stuck on the cutters or dropped due to gaps created by the cutters when the cutters are staggered into the air duct 2 when the cutters 3 are staggered, a retractable blowing unit 4 is provided below the cutters 3. Specifically, the cutters 3 include an upper blade 301 and a lower blade 302, and the upper and lower blades slide back and forth in a staggered manner when cutting. The blowing unit 4 includes a sliding frame 401 and a plurality of blowing pipes 402 provided on the sliding frame 401, and the blowing pipes 402 are evenly distributed along the lateral outer edge of the lower end of the cutters 3, such as Figure 2 As shown, when the shearing tool 3 is an arc-shaped cutter, the air blowing pipe 402 is evenly arranged along the arc line or surface; and the connection between the lower end of the air duct 2 and the shearing tool 3 is also in an arc-shaped fit.

[0030] The air outlet of the air blowing pipe 402 is arranged perpendicularly to the shearing tool 3, or the air blowing pipe 402 is arranged obliquely toward one side of the air duct 2, such as Figure 3 As shown, when the sliding frame 401 drives the air blowing tube 402 to slide to the right, the air outlet of the air blowing tube 402 blows from bottom to top toward the shearing tool 3, and blows the tea leaves on the shearing tool 3 into the suction port 201. Preferably, when the air blowing tube 402 slides to the right, the teeth on the upper and lower blades of the shearing tool 3 are in an overlapping state, so that the air blowing tube 402 can achieve the function of blowing and cleaning the blade (the gap between the teeth on the blade) when the teeth are in an overlapping state.

[0031] In order to enable the air blow pipe 402 to slide to the right to blow the tool when the upper and lower blades are in an overlapping state, in this embodiment, the sliding frame 401 is connected to the upper blade 301 or the lower blade 302 through the first cable 403, and the first cable 403 drives the sliding frame 401 through the guidance of the sleeve pull rope, that is, when the upper blade 301 or the lower blade 302 slides horizontally through the first cable 403, the sliding frame 401 is pulled to slide, so that the air blow pipe 402 can blow the gap between the teeth when the upper and lower blades are overlapping.

[0032] The sliding frame 401 is provided with a plurality of guide rods 404, such as Figure 3 As shown, the guide rod 404 extends to the left side and is slidingly arranged with the plate on the left side of the air duct 2. The sliding frame 401 is located between the left end of the guide rod 404 and the plate of the air duct 2 and is provided with a reset spring 405, so that the sliding frame 401 can automatically reset when it is not pulled by the upper blade 301 or the lower blade 302, and is hidden at the lower left side of the shearing tool 3.

[0033] The air duct 203 is provided with an air outlet 5 connected to the air blowing pipe 402. Figure 3 As shown, the air outlet 5 is located at the lower left corner of the air duct 203, and a flip plate 501 is rotatably provided in the air outlet 5 for realizing the opening and closing of the air outlet 5 and the air duct 203. The flip plate 501 is rotatably set on the wall on one side of the air outlet 5, and is rotatably connected to the wall through a pin; the flip plate 501 is inclined to the upper right on the other side of the pin to form a wind shield 7, and the end face of the left side of the wind shield 7 is connected to the sliding frame 401 through a second cable 502, that is, when the sliding frame 401 moves to the right, the wind shield 7 is pulled counterclockwise by the second cable 502, so that the flip plate 501 opens the air outlet 5, thereby part of the wind force in the air duct 203 is transported to the blowing pipe 402 through the air outlet 5 for blowing.

[0034] A synchronous pull rope 6 is arranged between the wind shield 7 and the adjusting plate 204, and a pull rope guide plate 601 matching with the synchronous pull rope 6 is arranged in the air duct 203, that is, the wind shield 7 is arranged at Figure 3 After rotating counterclockwise in the state shown, the adjusting plate 204 is pulled by the synchronous pull rope 6 to rotate the adjusting plate 204 counterclockwise, thereby reducing the air outlet cross-section of the air outlet 202, increasing the flow rate, and allowing the tea leaves in the air duct 2 to be quickly transported. At the same time, the air blowing pipe 402 blows the tea leaves on the shearing tool 3 to the suction port 201 for suction and transfer into the air duct 2.

[0035] In this embodiment, the specific setting structure of the pull cable or pull rope is a conventional technical means for technical personnel in this field and will not be elaborated on here. At the same time, when selecting the material of the adjustment plate 204, an elastic non-metallic plate can also be used as a replacement, thereby eliminating the need for the adjustment shaft 206 and the rotating reset part, reducing production and assembly costs; further, the elastic non-metallic plate can also adapt to tools of different shapes.

[0036] A tea picking method using a negative pressure tea picking machine, the method is as follows: S1: The shearing cutter 3 shears the tea leaves, and the sheared tea leaves are above the cutter. The air outlet 202 blows high-speed air into the air duct 2, and an air pressure difference is generated between the air outlet 202 and the suction port 201, so that a negative pressure is formed at the suction port 201. The sheared tea leaves are sucked by the suction port 201 and placed at the air outlet 202; S2: When the tea leaves are close to the air outlet 202, they are quickly blown into the air duct 2 by the high-speed airflow from the air outlet 202 and transported along the guide plate 205; S3: After the tea leaves are blown into the air duct 2 by the high-speed wind flow, they are transported along the air duct 2 to the storage mechanism at the end of the air duct, thereby realizing the harvesting of the tea leaves; S4: When the shearing cutter 3 performs transverse reciprocating shearing, it drives the sliding frame 401 to slide back and forth, so that the air blowing pipe 402 on the sliding frame 401 blows the cutter, and blows the tea leaves stuck on the cutter or about to fall back into the air duct 2; At the same time, when sliding, the sliding frame 401 pulls the adjustment plate 204 synchronously through the second pull rope 502 and the synchronous pull rope 6, thereby adjusting the size of the blowing port 202, changing the pressure difference between the blowing port 202 and the suction port 201, thereby changing the suction force of the suction port 201, and also changing the wind flow rate at the blowing port 202, thereby improving the effect of the air duct 2 on the transportation and collection of tea leaves.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A negative pressure tea picking machine, characterized in that: include Frame (1); An air duct (2) is obliquely arranged on the frame (1) and is used to transport the sheared tea leaves; as well as A shearing knife (3) is arranged at the lower end of the air duct (2) close to the travel direction of the frame (1); The lower end of the air duct (2) is provided with an adsorption port (201) for adsorbing tea leaves; A blow outlet (202) is provided at the lower end of the air duct (2) on the side away from the travel direction of the frame (1), and the blow outlet (202) is connected to the fan via an air duct (203); The air blowing port (202) blows air into the air duct (2), and an air pressure difference is generated between the air blowing port (202) and the adsorption port (201), so that a negative pressure is formed at the adsorption port (201), thereby achieving adsorption of tea leaves; The air blowing port (202) comprises an adjustment plate (204) arranged on a side close to the suction port (201); the adjustment plate (204) is rotatably arranged on the air duct (2); and the suction force at the suction port (201) is adjusted by adjusting the inclination angle between the adjustment plate (204) and the air duct (2).

2. A negative pressure tea picking machine according to claim 1, characterized in that: An adjusting plate (204) is provided on one side of the air outlet (202), and a guide plate (205) connected to the inner wall of the air duct (2) is provided on the other side, and the air blown out of the air outlet (202) is guided into the air duct (2) through the guide plate (205); The upper end of the adjustment plate (204) is higher than the lower end of the guide plate (205).

3. A negative pressure tea picking machine according to any one of claims 1-2, characterized in that: The adjustment plate (204) is rotatably arranged at the bottom of the air duct (2) via an adjustment shaft (206), and an elastic reset member is arranged between the adjustment shaft (206) and the air duct (2).

4. A negative pressure tea picking machine according to claim 1, characterized in that: The air duct (2) and the air pipe (203) are fixedly connected to form an integral whole, and a plurality of partitions (207) are provided in the air pipe (203).

5. The negative pressure tea picking machine according to claim 1, characterized in that: The shearing tool (3) comprises an upper blade (301) and a lower blade (302); an air blowing unit (4) is telescopically arranged below the shearing tool (3); the air blowing unit (4) comprises a sliding frame (401) and a plurality of air blowing pipes (402) arranged on the sliding frame (401); The sliding frame (401) cooperates with the upper blade (301) or the lower blade (302) via a first pull cable (403).

6. A negative pressure tea picking machine according to claim 5, characterized in that: A plurality of guide rods (404) are provided on the sliding frame (401), and the guide rods (404) are slidably arranged on the air duct (2). A return spring (405) is provided between the sliding frame (401) and the air duct (2).

7. A negative pressure tea picking machine according to claim 5, characterized in that: The air blowing pipe (402) is arranged perpendicularly to the shearing knife (3), or the air blowing pipe (402) is arranged obliquely toward one side of the air duct (2).

8. The negative pressure tea picking machine according to claim 5, characterized in that: The air duct (203) is provided with an air outlet (5) connected to the air blowing pipe (402), and a flip plate (501) is rotatably provided inside the air outlet (5) for realizing the opening and closing of the air outlet (5) and the air duct (203), and the flip plate (501) is connected to the sliding frame (401) via a second cable (502).

9. A negative pressure tea picking machine according to claim 8, characterized in that: A synchronous pull rope (6) is provided between the flip plate (501) and the adjustment plate (204), and a pull rope guide plate (601) matching the synchronous pull rope (6) is provided in the air duct (203).

10. The tea picking method using a negative pressure tea picking machine according to claim 2, characterized in that: The method is as follows: S1: The shearing tool (3) shears the tea leaves, and the sheared tea leaves are located above the tool. The air outlet (202) blows a high-speed airflow into the air duct (2), and an air pressure difference is generated between the air outlet (202) and the suction port (201), so that a negative pressure is formed at the suction port (201). The sheared tea leaves are sucked by the suction port (201) and placed at the air outlet (202); S2: After the tea leaves approach the air outlet (202), they are quickly blown into the air duct (2) by the high-speed airflow from the air outlet (202) and transported along the guide plate (205); S3: After the tea leaves are blown into the air duct (2) by the high-speed air flow, they are transported along the air duct (2) to a storage device at the end of the air duct, thereby harvesting the tea leaves; S4: The regulating plate (204) changes the pressure difference between the blowing port (202) and the suction port (201) by adjusting the size of the blowing port (202), thereby changing the suction force of the suction port (201) and also changing the wind speed at the blowing port (202).

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