A tobacco plant leaf back spraying device

Abstract

The present application belongs to the technical field of tobacco planting, and particularly relates to a tobacco plant leaf back pesticide spraying device, which comprises a moving trolley and a pesticide tank arranged on the moving trolley. A spraying mechanism is arranged at one end of the moving trolley in the advancing direction and at the corresponding two sides of the tobacco ridge. The spraying mechanism comprises an outer pipe arranged on the moving trolley and a sliding rod arranged in the outer pipe at one end and provided with a liquid spraying cylinder at the other end. The top surface of the liquid spraying cylinder is provided with an atomizing nozzle with the liquid outlet upward, and the bottom surface of the liquid spraying cylinder is connected with the water pump in the pesticide tank through a hose. The end of the sliding rod away from the outer pipe is further integrally extended with a guide rod in an arc structure with the free end curved away from the moving direction. The present application has a simple structure and can effectively spray pesticide on the back of the tobacco plant leaf, accurately kill pests on the leaf back and greatly improve the pest control effect.

Description

Technical Field

[0001] This invention belongs to the field of tobacco planting technology, and in particular relates to a spraying device for the underside of tobacco leaves. Background Technology

[0002] Current tobacco field spraying operations mainly employ backpack sprayers, boom sprayers, or simple walking spraying devices. The sprayer pressurizes the pesticide solution through a pump and sprays it out through the nozzle to cover the tobacco leaves, stems, and surrounding soil. Some spraying devices are equipped with wheels or small support structures, allowing them to move between rows of tobacco plants and enabling the nozzle to continuously spray the tobacco plants on both sides along the travel route, thereby improving application efficiency and coverage area.

[0003] However, in actual tobacco field use, due to the complex layer distribution of tobacco leaves, the fact that the lower leaves generally droop and the back is the main gathering area for aphids, the spraying direction of traditional spraying devices is mostly upward or side spraying. The nozzles are difficult to actively approach the back of the leaves, resulting in most of the sprayed liquid falling on the leaf surface or the ground surface, with low coverage of the back of the leaves and poor control effect. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a spraying device for the underside of tobacco leaves. The invention has a simple structure and can effectively spray pesticides onto the underside of tobacco leaves, precisely killing pests on the underside of leaves and significantly improving pest control effectiveness.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A tobacco leaf under-leaf spraying device includes a mobile trolley and a liquid tank set on the mobile trolley. A spraying mechanism is provided at one end of the mobile trolley in the direction of travel on the corresponding two sides of the tobacco ridge. The spraying mechanism includes an outer pipe mounted on the mobile trolley and a sliding rod with one end slidably set in the outer pipe and the other end provided with a spray cylinder. The top surface of the spray cylinder is equipped with an atomizing nozzle with the liquid outlet facing upwards, and the bottom surface of the spray cylinder is connected to a water pump in the liquid tank via a hose. The end of the slide bar away from the outer tube is also integrally provided with a guide rod, which has an arc-shaped structure with the free end bent in the opposite direction of movement.

[0006] Preferably, one end of the slide rod located inside the outer tube is connected to a baffle installed inside the outer tube via a return spring.

[0007] Preferably, the outer tube is radially connected to the corresponding mounting plate, the two mounting plates are coaxial and assembled on the outer wall of the adjusting tube through bearings, the adjusting tube is screwed to the adjusting screw through a preset internal thread section, and the bottom end of the adjusting screw is screwed to a preset internal thread hole on the moving trolley.

[0008] Preferably, a spiral spring is also sleeved on the outside of the regulating tube, with both ends of the spiral spring connected to the outer wall of the regulating tube and the bottom surface of the corresponding mounting plate, respectively.

[0009] Preferably, the outer wall of the spray cylinder is assembled with the inner wall of the rotating ring via two coaxially arranged bearings, and the cavity formed by the rotating ring, the two bearings, and the spray cylinder is connected to several air blowing components.

[0010] Preferably, the air blowing assembly includes an air pipe with one end radially disposed on the outer wall of the rotating ring and connected to the cavity, and the other end connected to an air pipe equipped with a jet tube, with several air pipes arranged at equal intervals around the circumference.

[0011] Preferably, the mobile trolley is also equipped with an air pump, and the output end of the air pump is connected to the cavity through a flexible tube that passes through the bottom surface and side wall of the spray cylinder in sequence.

[0012] Preferably, the top of the jet tube is provided with a jet hole, which is an arc-shaped channel with its inner arc surface facing the atomizing nozzle.

[0013] Preferably, one end of the mobile trolley in the forward direction is also provided with an adjustment channel that runs horizontally through it, and the adjustment channel is connected to the outside through a pre-set adjustment elongated hole on the outer wall; Two horizontally arranged L-shaped rods are located on both sides of the moving trolley, with one end of the L-shaped rods slidably disposed within the adjustment cavity; The other end of the L-shaped rod is connected to the bottom end of the inclined leaf-picking rod, and the top end of the leaf-picking rod is located above the slide rod.

[0014] Preferably, the L-shaped rod has an internal threaded hole pre-set at the corresponding adjustment elongated hole, and the positioning bolt that is screwed into the internal threaded hole is used to limit the instantaneous position of the L-shaped rod and the adjustment cavity.

[0015] The working process of this invention is as follows: The mobile trolley is moved between tobacco rows for operation. Before operation, the spacing of the leaf-picking rods needs to be adjusted so that the leaf-picking rods can contact the bottom leaves of the tobacco plants on the corresponding tobacco rows. Pull the L-shaped rod out or push it into the adjustment channel. After reaching the target position, screw the positioning bolt and the internal threaded hole together and ensure that the L-shaped rod is tightly pressed against the inner wall of the adjustment channel to fix the instantaneous position of the L-shaped rod and the adjustment channel.

[0016] Simultaneously rotating the adjusting screw relative to the moving trolley and the adjusting cylinder not only changes the length of the adjusting screw exposed above the trolley, but also causes the adjusting cylinder to make axial displacement relative to the adjusting screw, thereby achieving a change in the height of the adjusting cylinder relative to the moving trolley. This allows the spraying mechanism to effectively enter the working space below the tobacco plants.

[0017] Then turn on the water pump and air pump and push the moving trolley along the extension of the tobacco ridge: The leaf-lifting rod is inserted from below the bottom leaf and lifts it during movement. Simultaneously, a water pump pumps the pesticide solution into the spray cylinder through a hose, and the solution is finally sprayed upwards through the atomizing nozzle. At the same time, an air pump pumps outside air into the cavity through a hose, and the air is ejected through the air pipe and the air jet nozzle's nozzle orifice. Because the nozzles are arc-shaped, the airflow from multiple nozzles forms a near-frustum-shaped airflow "curtain" that envelops the atomizing nozzle. This airflow effectively transports the atomized pesticide solution upwards, expanding the spray area and significantly reducing the impact of gravity on the solution. This allows the solution to adhere effectively to the back of the upper leaves (tobacco plants have alternate, asymmetrical leaf arrangement, with multiple leaves spirally distributed on the stem). It also limits the direction of the atomized solution from spilling onto the ground. Because the leaves are large and heavy, a rotating ring rotates due to friction when the air jet nozzle contacts the leaves, reducing potential abrasions.

[0018] To increase the spraying area and ensure even distribution of the pesticide solution on the underside of the leaves, this invention designs the spraying mechanism as a movable operating structure. Specifically, before the moving trolley begins operation, rotating the adjusting screw causes the adjusting tube to move axially relative to the leaf, ensuring the spraying mechanism is positioned below the bottom leaf. During movement, the leaf-lifting rod lifts the bottom leaf, allowing the outer arc surface of the guide rod to smoothly contact the bottom stem of the tobacco plant. The stem's resistance during movement continuously compresses the return spring, causing the sliding rod to slide into the outer tube. This movement of the spray cylinder further expands the spraying range and the sprayed area on the leaves. Once past the current tobacco plant stem, the return spring pushes the sliding rod back to its original position.

[0019] To prevent the guide rod from failing to pass the stem due to compression by the return spring, the present invention also designs a spiral spring as a compensation method, so that the outer cylinder can eventually rotate around the adjusting cylinder 2 by compressing the spiral spring, ensuring that the guide rod 25 will not knock down the tobacco.

[0020] The corresponding hose 5 should be long enough to effectively compensate for the displacement of the liquid spray tube and the air spray tube.

[0021] Compared with the prior art, the present invention has the following advantages: The present invention has a simple structure and can effectively spray pesticides on the back of tobacco leaves, accurately kill pests on the back of leaves, and greatly improve the pest control effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the tobacco leaf underside spraying device described in a specific implementation method; Figure 2 This is a schematic diagram of the spraying mechanism described in a specific embodiment. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] like Figure 1-2 As shown, a tobacco leaf back spraying device includes a mobile trolley 1 and a liquid tank 11 mounted on the mobile trolley. The mobile trolley 1 has a spraying mechanism at one end of the forward direction at the corresponding two sides of the tobacco rows. The spraying mechanism includes an outer tube 23 mounted on the mobile trolley and a slide rod 24 with one end slidably disposed inside the outer tube 23 and the other end provided with a spray cylinder 3. The end of the slide rod 24 located inside the outer tube is connected to a baffle disposed inside the outer tube 23 through a return spring. The end of the slide rod 24 away from the outer tube is also integrally provided with a guide rod 25. The guide rod 25 has an arc-shaped structure with the free end bent away from the direction of movement.

[0025] The outer tube 23 is radially connected to the corresponding mounting plate 22. The two mounting plates 22 are coaxial and assembled to the outer wall of the adjusting tube 2 via bearings. The adjusting tube 2 is screwed to the adjusting screw 21 through a preset internal thread section. The bottom end of the adjusting screw 21 is screwed to a preset internal thread hole on the moving trolley. A spiral spring 26 is also sleeved on the outside of the adjusting tube 2. The two ends of the spiral spring 26 are respectively connected to the outer wall of the adjusting tube 2 and the bottom surface of the corresponding mounting plate 22.

[0026] The top surface of the spray cylinder 3 is provided with an atomizing nozzle 31 with the liquid outlet facing upwards, and the bottom surface of the spray cylinder is connected to the water pump in the medicine tank 11 through a hose 5. The outer wall of the spray cylinder 3 is assembled with the inner wall of the rotating ring 4 via two coaxially arranged bearings 41. The cavity formed by the inner wall of the rotating ring 4, the two bearings, and the outer wall of the spray cylinder 3 is connected and communicated with several circumferentially spaced air pipes 44. The mobile trolley is also equipped with an air pump 12. The output end of the air pump 12 is connected to the cavity via a flexible hose 5 that passes through the bottom and side wall of the spray cylinder 3 in sequence.

[0027] The air pipe 44 extends radially and is connected to the air tube 42 at its free end. The air tube 42 has an air hole 43 at its top, and the air hole 43 is an arc-shaped channel with its inner arc surface facing the atomizing nozzle 31.

[0028] One end of the mobile trolley in the forward direction is also provided with an adjustment cavity 13. The adjustment cavity 13 is connected to the outside through a pre-set adjustment elongated hole 14 on the outer wall. Two horizontally arranged L-shaped rods 15 are located on both sides of the mobile trolley, and one end of the L-shaped rod is slidably disposed in the adjustment cavity 13. The other end of the L-shaped rod 15 is connected to the bottom end of the inclined leaf-picking rod 16, and the top end of the leaf-picking rod 16 is located above the slide rod 24. The L-shaped rod 25 has an internal threaded hole at the corresponding adjustment elongated hole 14, and the positioning bolt 17 that is screwed into the internal threaded hole is used to limit the instantaneous position of the L-shaped rod 15 and the adjustment cavity 13.

[0029] The working process of this invention is as follows: The mobile trolley is moved between tobacco rows for operation. Before operation, the spacing of the leaf-picking rods 16 needs to be adjusted so that the leaf-picking rods 16 can contact the bottom leaves of the tobacco plants on the corresponding tobacco rows. Pull the L-shaped rod 15 out or push it into the adjustment cavity 13, and then, after reaching the target position, screw the positioning bolt 17 into the internal threaded hole and ensure that the L-shaped rod 15 is tightly pressed against the inner wall of the adjustment cavity 13 to fix the immediate position of the L-shaped rod 15 and the adjustment cavity 13.

[0030] At the same time, the adjusting screw 21 rotates relative to the moving trolley 1 and the adjusting cylinder 2, which not only changes the length of the adjusting screw 21 exposed above the trolley, but also causes the adjusting cylinder 2 to make axial displacement relative to the adjusting screw 21, thereby realizing the height change of the adjusting cylinder 2 relative to the moving trolley. In this way, the spraying mechanism can effectively enter the working space below the tobacco plants.

[0031] Then turn on water pump 11 and air pump 12 and push the moving trolley along the extension direction of the tobacco ridge: The leaf-lifting rod 16 is inserted from below the bottom leaf at its lowest point and lifts the bottom leaf during movement. Simultaneously, the water pump 11 pumps the liquid medicine into the spray cylinder 3 through the hose 4, and the liquid medicine is finally sprayed upward through the atomizing nozzle 31. At the same time, the air pump 12 pumps outside air into the cavity through the hose 5 and sprays it out through the air pipe 44 and the air jet nozzle 42's air jet holes 43. Because the air jet holes 43 have an arc-shaped structure, the airflow from multiple air jet holes 43 can form a near-frustum-shaped airflow "curtain" that surrounds the atomizing nozzle. On the one hand, the airflow can be used to transport the atomized liquid medicine upward and effectively expand the spray area of ​​the liquid medicine, greatly reducing the impact of gravity on the liquid medicine, so that the liquid medicine can effectively adhere to the back of multiple leaves above (the leaf arrangement of tobacco plants is alternate, that is, asymmetrically distributed, and multiple leaves are distributed in a spiral on the stem). On the other hand, it also restricts the spray direction of the atomized liquid medicine overflowing to the ground. Because the blades are large in volume and mass, in order to reduce the possibility of friction damage, the rotating ring 4 can rotate by friction when the jet tube contacts the blades, thereby reducing hard abrasion.

[0032] To increase the spraying area and ensure even distribution of the pesticide solution on the underside of the leaves, the spraying mechanism of this invention is designed as a movable operating structure. Specifically, during the moving operation, the leaf-lifting rod 16 lifts the bottom leaves, allowing the outer arc surface of the guide rod 25 to smoothly contact the bottom stem of the tobacco plant. During movement, the guide rod is continuously compressed by the stem's resistance, causing the return spring to slide into the outer tube 23. This allows the spraying cylinder 3 to move, further expanding the spraying range and the sprayed area on the leaves. Once past the current tobacco plant stem, the return spring pushes the slide rod 24 back to its original position.

[0033] To prevent the guide rod 25 from failing to pass the stem due to compression by the return spring, the present invention also designed a compensation method, a spiral spring 26, so that the outer cylinder 23 can eventually rotate around the adjusting cylinder 2 by compressing the spiral spring 26, ensuring that the guide rod 25 will not knock down the tobacco.

[0034] The corresponding hose 5 should be long enough to effectively compensate for the displacement of the liquid spray tube and the air spray tube.

Claims

1. A device for spraying pesticides on the underside of tobacco leaves, comprising a mobile trolley and a pesticide tank mounted on the mobile trolley, wherein a spraying mechanism is provided at one end of the mobile trolley in the direction of travel on both sides of the tobacco ridges, characterized in that, The spraying mechanism includes an outer pipe mounted on a mobile trolley and a slide rod with one end slidably disposed inside the outer pipe and the other end having a spray nozzle. The top surface of the spray cylinder is equipped with an atomizing nozzle with the liquid outlet facing upwards, and the bottom surface of the spray cylinder is connected to a water pump in the liquid tank via a hose. The end of the slide bar away from the outer tube is also integrally provided with a guide rod, which has an arc-shaped structure with its free end bent in the opposite direction of movement.

2. The tobacco leaf underside spraying device as described in claim 1, characterized in that, One end of the slide rod located inside the outer tube is connected to a baffle installed inside the outer tube via a return spring.

3. The tobacco leaf underside spraying device as described in claim 2, characterized in that, The outer tube is radially connected to the corresponding mounting plate. The two mounting plates are coaxial and assembled on the outer wall of the adjusting tube through bearings. The adjusting tube is screwed to the adjusting screw through a preset internal thread section. The bottom end of the adjusting screw is screwed to a preset internal thread hole on the moving trolley.

4. The tobacco leaf underside spraying device as described in claim 3, characterized in that, A spiral spring is also fitted around the outside of the regulating tube, with its two ends connected to the outer wall of the regulating tube and the bottom surface of the corresponding mounting plate, respectively.

5. The tobacco leaf underside spraying device as described in claim 1, characterized in that, The outer wall of the spray cylinder is assembled with the inner wall of the rotating ring via two coaxially arranged bearings. The cavity formed by the rotating ring, the two bearings, and the spray cylinder is connected to several air blowing components.

6. The tobacco leaf underside spraying device as described in claim 5, characterized in that, The air blowing assembly includes an air pipe with one end radially disposed on the outer wall of the rotating ring and connected to the cavity, and the other end connected to an air pipe equipped with a jet tube, with several air pipes arranged at equal intervals around the circumference.

7. The tobacco leaf underside spraying device as described in claim 6, characterized in that, The mobile trolley is also equipped with an air pump, and the output end of the air pump is connected to the cavity through a flexible tube that passes through the bottom and side wall of the spray cylinder in sequence.

8. The tobacco leaf underside spraying device as described in claim 6, characterized in that, The top of the jet tube is provided with a jet hole, which is an arc-shaped channel with its inner arc surface facing the atomizing nozzle.

9. The tobacco leaf underside spraying device as described in claim 1, characterized in that, One end of the mobile trolley in the direction of travel is also provided with a horizontally penetrating adjustment cavity, which is connected to the outside through a pre-set adjustment elongated hole on the outer wall; Two horizontally arranged L-shaped rods are located on both sides of the moving trolley, with one end of the L-shaped rods slidably disposed within the adjustment cavity; The other end of the L-shaped rod is connected to the bottom end of the inclined leaf-picking rod, and the top end of the leaf-picking rod is located above the slide rod.

10. The tobacco leaf underside spraying device as described in claim 9, characterized in that, The L-shaped rod has an internal threaded hole pre-set at the corresponding adjustment elongated hole, and the positioning bolt that is screwed into the internal threaded hole is used to limit the instantaneous position of the L-shaped rod and the adjustment cavity.

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