A negative pressure tea picking machine and a tea picking method

Abstract

The present invention discloses a negative pressure tea picking machine and a tea picking method, comprising a frame body; an air duct, which is inclined and arranged on the frame body for transporting the cut tea leaves; and a cutting tool, which is arranged at the lower end of the air duct on the side close to the advancing direction of the frame body; an adsorption port for adsorbing tea leaves is arranged at the lower end of the air duct; a blowing port is arranged at the lower end of the air duct on the side far from the advancing direction of the frame body, and the blowing port is connected with a fan through an air duct; the blowing port comprises an adjusting plate arranged on the 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; the present invention provides a tea picking machine that adsorbs and transports the cut tea leaves by forming a negative pressure at the adsorption port, improves the effectiveness of adsorbing and collecting the cut tea leaves, and prevents the tea leaves from falling outside the air duct, causing waste and loss.

Description

Technical Field

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

[0002] A tea picking machine is a kind of tea harvesting machinery. The existing tea picking machines include handheld and walking types. During use, the walking type of tea picking machine is widely praised in the market for its high tea picking efficiency. The walking type of tea picking machine is usually equipped with a horizontally reciprocating cutting tool, and the tea leaves cut by the tool are blown into the air duct in the form of blowing, and then enter the collection unit through the guidance of the air duct to complete the collection of tea leaves.

[0003] The tea leaves cut by the above-mentioned tea picking machine are transported and collected by blowing through a blower. In this process, the following problems still have not been effectively solved:

[0004] 1. When the blowing mechanism blows the cut tea leaves, it is very easy to blow the tea leaves off or out of the air duct, resulting in waste of tea leaves during harvesting. And after arranging multiple air blowing ports, the tea leaves are very easy to form a vortex state and rotate in the air duct, affecting the conveying efficiency;

[0005] 2. During the process of the reciprocating tool cutting the tea leaves, tea leaves are easily left on the tool and fall off during walking, resulting in waste of tea leaves during harvesting. Summary of the Invention

[0006] The present invention aims at the deficiencies in the prior art and provides a negative pressure tea picking machine and a tea picking method.

[0007] To solve the above technical problems, the present invention is solved by the following technical solutions: A negative pressure tea picking machine includes

[0008] a frame;

[0009] an air duct, which is inclined on the frame and used for transporting the cut tea leaves; and

[0010] a cutting tool, which is arranged at the lower end of the air duct on the side close to the advancing direction of the frame;

[0011] an adsorption port for adsorbing tea leaves is arranged at the lower end of the air duct;

[0012] a blowing port is arranged at the lower end of the side of the air duct away from the advancing direction of the frame, and the blowing port is connected to a blower through an air duct;

[0013] 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 realize the adsorption of tea leaves;

[0014] The air outlet includes an adjusting plate disposed on one side close to the adsorption port. 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.

[0015] In the above solution, preferably, one side of the air outlet is provided with an adjusting plate, and the other side is provided with a guiding plate connected to the inner wall of the air duct. The air blown out from the air outlet is guided into the air duct through the guiding plate;

[0016] The upper end of the adjusting plate is higher than the lower end of the guiding plate.

[0017] In the above solution, preferably, the adjusting plate is rotatably arranged at the bottom of the air duct through an adjusting shaft, and an elastic resetting member is arranged between the adjusting shaft and the air duct.

[0018] In the above solution, preferably, the air duct is fixedly connected to the air pipe as a whole, and a plurality of partition plates are arranged in the air pipe.

[0019] In the above solution, preferably, the shearing tool includes an upper blade and a lower blade. A blowing unit is telescopically arranged below the shearing tool. The blowing unit includes a sliding frame and a plurality of blowing pipes arranged on the sliding frame;

[0020] The sliding frame is cooperated with the upper blade or the lower blade through a first cable.

[0021] In the above solution, preferably, a plurality of guiding rods are arranged on the sliding frame. The guiding rods are slidably arranged on the air duct, and a reset spring is arranged between the sliding frame and the air duct.

[0022] In the above solution, preferably, the blowing pipes are arranged perpendicular to the shearing tool, or the blowing pipes are inclined towards one side of the air duct.

[0023] In the above solution, preferably, an air outlet connected to the blowing pipes is arranged on the air pipe. A turning plate for realizing the opening and closing of the air outlet and the air pipe is rotatably arranged in the air outlet. The turning plate is connected to the sliding frame through a second cable.

[0024] In the above solution, preferably, a synchronous cable is arranged between the turning plate and the adjusting plate, and a cable guiding plate cooperated with the synchronous cable is arranged in the air pipe.

[0025] In the above solution, preferably, a tea picking method of a negative pressure tea picking machine is as follows:

[0026] S1: The shearing tool shears the tea leaves. The sheared tea leaves are above the tool. The air outlet blows high-speed air flow into the air duct, generating an air pressure difference between the air outlet and the adsorption port, so that a negative pressure is formed at the adsorption port. The sheared tea leaves are adsorbed by the adsorption port and placed at the air outlet;

[0027] S2: After the tea leaves approach the air outlet, they are quickly blown into the air duct by the high-speed air flow at the air outlet and are conveyed along the guide plate.

[0028] S3: After the tea leaves are blown into the air duct by the high-speed air flow, they are conveyed along the air duct to the storage mechanism at the end of the air duct, realizing the harvesting of the tea leaves.

[0029] S4: The adjusting plate changes the pressure difference between the air outlet and the adsorption port by adjusting the size of the air outlet, thereby changing the adsorption force of the adsorption port and also changing the wind velocity at the air outlet.

[0030] The beneficial effects of the present invention are as follows: The present invention provides a tea picking machine that adsorbs and transports the sheared tea leaves by forming a negative pressure at the adsorption port, improving the effectiveness of adsorbing and collecting the tea leaves after being sheared, and preventing the tea leaves from falling outside the air duct, resulting in waste and loss.

[0031] At the same time, by arranging an inclined guide plate along the air duct, the transmission of the tea leaves in the air duct is more stable and rapid, and the tea leaves are transmitted by adhering to the guide plate and the air duct wall, which is more stable. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the installation position of the air duct and the frame body of the present invention.

[0033] Figure 2 It is a front view structural schematic diagram of the air duct of the present invention.

[0034] Figure 3 It is a side view structural schematic diagram of the air duct of the present invention.

[0035] Figure 4 For the present invention Figure 3 The enlarged structural schematic diagram at position A.

[0036] Figure 5 It is a schematic diagram of the internal structure of the air duct of the present invention. Detailed Embodiments

[0037] The following further describes the present invention in detail in conjunction with the drawings and specific embodiments: Refer to Figures 1 - 5 .

[0038] A negative pressure tea picking machine includes a frame body 1, an air duct 2 and a shearing tool 3. A power walking component is arranged at the bottom of the frame body 1 for the driving of the tea picking machine. The frame body 1 adopts a gantry frame. The air duct 2 is located in the middle of the frame body 1. When the tea picking machine is walking, the tea tree is located in the middle area of the frame body 1, and the frame body 1 straddles the tea tree. The shearing tool 3 is arranged 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 advancing direction of the frame body 1.

[0039] As Figure 1As shown, the air duct 2 is inclined on the frame body 1. The inclination angle of the air duct 2 with respect to the vertical direction is 8°, and its inclination direction is from the side of the advancing direction of the frame body 1 from bottom to top and away from the side of the advancing direction of the frame body 1. The shearing end of the shearing tool 3 is located at the forefront of the air duct 2, as Figures 1 - 3 shown; an adsorption port 201 matching the shearing tool 3 is provided on the air duct 2. The adsorption port 201 communicates 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 and enter the air duct 2.

[0040] 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 collected by the storage mechanism after being transported through the air duct 2; as Figure 3 shown, a blowing port 202 is provided on the side of the bottom of the air duct 2 away from the advancing direction of the frame body 1. The blowing port 202 is connected to a blower through an air duct 203, and the blower blows high-pressure air into the air duct 203 and then blows it out from the blowing port 202.

[0041] As Figure 3 shown, the blowing port 202 includes an adjusting plate 204 provided on the right side and a guiding plate 205 provided on the left side. The guiding plate 204 is inclined. There is a first passage for the air flow to pass through at the lower end between the guiding plate 204 and the bottom of the air duct 2, and the upper end is inclined to the left and fixed to the left side wall of the air duct 2. A blowing port 202 is formed between the guiding plate 205 and the adjusting plate 204. When the air blows out from the blowing port 202, an air pressure difference is generated with the adsorption port 201, so that a negative pressure area is formed in the area near the adsorption port 201, so that the tea leaves are adsorbed by the negative pressure area when they are close to the adsorption port 201 after being sheared.

[0042] As Figures 3 - 4 shown, the upper end of the adjusting plate 204 is higher than the lower end of the guiding plate 205, and the flow direction of the air flow at the blowing port 202 after passing through the air duct 203 is as shown by the arrow "→" in the figure; the inclination angle of the adjusting plate 204 with respect to the vertical direction in the initial state is preferably 5°, and the inclination angle of the guiding plate 205 with respect to the vertical direction is 30°, that is, as Figure 4 shown in the figure; the air flow blown out from the blowing port 202 flows along the plate surface of the guiding plate 205 under the guidance of the guiding plate 205, so that the tea leaves entering the air duct 2 can be transported by fitting the wall of the guiding plate 205, improving the stability of the tea leaves transported in the air duct 2.

[0043] The adjusting plate 204 is rotatably arranged on the bottom wall of the air duct 2. Preferably, the air pipe 203 is installed at the bottom of the air duct 2. After the air pipe 203 is installed, the bottom of the air duct 2 can be integrated. When installing the adjusting plate 204, it can be installed on the bottom wall of the air duct 2. The lower end of the adjusting plate 204 is rotatably connected to the bottom wall of the air duct 2 through an adjusting shaft 206, and an elastic reset member is arranged between the adjusting 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 those skilled in the art and will not be elaborated here. By adjusting the inclination angle between the adjusting plate 204 and the air duct 2, the adsorption force at the adsorption port 201 and the flow rate of the wind at the air outlet 202 are adjusted, that is, the flow rate and flow rate adaptively change after the cross-section of the air outlet 202 changes.

[0044] As Figure 5 shown, a plurality of partition plates 207 are arranged in the air pipe 203. The upper end of the air pipe 203 is provided with an air inlet, which is connected to a fan through a hose. The air enters the air pipe 203 from the two side air inlets and is evenly blown out from the air outlet 202 through the separation and guidance of the partition plates 207.

[0045] To blow the tea leaves stuck on the cutting tools or dropped due to the gaps generated when the cutting tools cross each other into the air duct 2 when the shearing tools 3 cross shear, a telescopic blowing unit 4 is arranged below the shearing tools 3. Specifically, the shearing tools 3 include an upper blade 301 and a lower blade 302, and the upper and lower blades slide horizontally in a reciprocating and staggered manner during shearing. The blowing unit 4 includes a sliding frame 401 and a plurality of blowing pipes 402 arranged on the sliding frame 401. The blowing pipes 402 are evenly distributed along the horizontal outer edge at the lower end of the shearing tools 3. As Figure 2 shown, that is, when the shearing tools 3 are arc-shaped cutting tools, the blowing pipes 402 are evenly arranged along the arc line or surface. The connection between the lower end of the air duct 2 and the shearing tools 3 is also in an arc-shaped fitting state.

[0046] The blowing ports of the blowing pipes 402 are arranged perpendicular to the shearing tools 3, or the blowing pipes 402 are inclined towards one side of the air duct 2. As Figure 3 shown, when the sliding frame 401 drives the blowing pipes 402 to slide to the right, the blowing ports of the blowing pipes 402 blow upwards towards the shearing tools 3, blowing the tea leaves on the shearing tools 3 into the adsorption port 201. Preferably, when the blowing pipes 402 slide to the right, the tooth parts on the upper and lower blades of the shearing tools 3 are in an overlapping state, so that the blowing pipes 402 can perform the function of purging and cleaning the blades (the gaps between the teeth on the blades) in the overlapping state of the tooth parts.

[0047] To ensure that the blowpipe 402 slides out exactly to the right to purge the tool when the upper and lower blades are in the 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. The first cable 403 drives the sliding frame 401 through the guiding method of the casing cable, that is, when the upper blade 301 or the lower blade 302 slides horizontally, the first cable 403 pulls the sliding frame 401 to slide, so that when the upper and lower blades overlap, the blowpipe 402 exactly purges the tooth gap.

[0048] A number of guide rods 404 are provided on the sliding frame 401, as Figure 3 shown. The guide rods 404 extend to the left and are slidably arranged in a guiding manner with the plate member on the left side of the air duct 2. A return spring 405 is provided between the left end portion of the guide rod 404 where the sliding frame 401 is located and the plate member of the air duct 2, so that the sliding frame 401 can automatically reset when not being pulled by the upper blade 301 or the lower blade 302 and is hidden under the left lower part of the shearing tool 3.

[0049] An air outlet 5 connected to the blowpipe 402 is provided on the air duct 203, as Figure 3 shown. The air outlet 5 is located at the lower left corner of the air duct 203. A flap 501 for realizing the opening and closing of the air outlet 5 and the air duct 203 is rotatably provided in the air outlet 5. The flap 501 is rotatably arranged on the wall body on one side of the air outlet 5 and is rotatably connected to the wall body through a pin shaft; the flap 501 inclines upward to the right on the other side of the pin shaft to form a wind baffle 7. The end face on the left side of the wind baffle 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 second cable 502 pulls the wind baffle 7 to rotate counterclockwise, so that the flap 501 opens the air outlet 5, and thus part of the wind force in the air duct 203 is conveyed to the blowpipe 402 through the air outlet 5 for blowing.

[0050] A synchronous cable 6 is provided between the wind baffle 7 and the adjusting plate 204. A cable guide plate 601 matched with the synchronous cable 6 is provided in the air duct 203, that is, when the wind baffle 7 Figure 3 shown rotates counterclockwise, the adjusting plate 204 is pulled through the synchronous cable 6, so that the adjusting plate 204 rotates counterclockwise, reducing the cross-sectional area of the air outlet of the air blowing port 202, increasing the flow rate, enabling the tea leaves in the air duct 2 to be quickly transported, and at the same time, the blowpipe 402 blows the tea leaves on the shearing tool 3 to the adsorption port 201 for adsorption and conveys them into the air duct 2.

[0051] In this embodiment, the specific setting structure of the cable or rope is a conventional technical means for those skilled in the art, and will not be elaborated here. At the same time, when selecting the material of the adjusting plate 204, an elastic non-metallic plate can also be used for substitution, so as to eliminate the setting of the adjusting shaft 206 and the rotation resetting member, and reduce the production and assembly costs; further, the elastic non-metallic plate can also adapt to cutters of different shapes.

[0052] A tea picking method of a negative pressure tea picking machine is as follows:

[0053] S1: The shearing cutter 3 shears the tea leaves. After shearing, the tea leaves are above the cutter. The air blowing port 202 blows high-speed air flow into the air duct 2. 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. The sheared tea leaves are adsorbed by the adsorption port 201 and placed at the air blowing port 202.

[0054] S2: After the tea leaves approach the air blowing port 202, they are quickly blown into the air duct 2 by the high-speed air flow of the air blowing port 202 and are conveyed along the guide plate 205.

[0055] S3: After the tea leaves are blown into the air duct 2 by the high-speed air flow, they are conveyed along the air duct 2 to the storage mechanism at the end of the air duct, realizing the harvesting of the tea leaves.

[0056] S4: When the shearing cutter 3 reciprocates horizontally, it drives the sliding frame 401 to reciprocate, so that the air blowing pipe 402 on the sliding frame 401 purges the cutter, and blows the tea leaves stuck on the cutter or about to fall back into the air duct 2.

[0057] At the same time, when the sliding frame 401 slides, it synchronously drives the adjusting plate 204 through the second cable 502 and the synchronous rope 6, thereby adjusting the size of the air blowing port 202, changing the pressure difference between the air blowing port 202 and the adsorption port 201, thereby changing the adsorption force of the adsorption port 201, and also changing the wind speed at the air blowing port 202, improving the conveying and collecting effect of the air duct 2 on the tea leaves.

[0058] 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 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); 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); 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); 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).

2. 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).

3. A negative pressure tea picking machine according to claim 1, 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).

4. A negative pressure tea picking machine according to claim 1, 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).

5. The negative pressure tea picking machine according to claim 1, 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).

6. A negative pressure tea picking machine according to claim 5, 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).

7. The tea picking method using a negative pressure tea picking machine according to claim 1, 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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