A reverse jet spraying structure for pear tree leaf back disease

Abstract

This invention relates to a reverse spraying structure for treating diseases on the underside of pear leaves. It includes a mounting chassis, a first medicine tank, a second medicine tank, a spraying moving mechanism, a spraying adjustment mechanism, a spraying connection module, and a spraying module. The spraying moving mechanism drives the spraying adjustment mechanism to move linearly along a moving guide rail, achieving precise adjustment of the spraying position. The adjustment motor in the spraying adjustment mechanism drives the spraying pipe to rotate axially via a gear ring, causing the fan-shaped nozzle to spray the pesticide solution upwards from below the plant, directly targeting and infecting diseases such as black spot disease on the underside of pear leaves. The spraying connection module is equipped with a separating sealing plate. This invention divides the inner cavity of the spraying pipe into two independent chambers, each connected to one of the two medicine tanks. Combined with the limiting action of the intercepting bracket and the rotation of the spraying pipe to close the spraying nozzle, the pressure of the pesticide solution pushes the separating sealing plate to slide, achieving rapid switching between the two pesticide solutions with zero cross-contamination.

Description

Technical Field

[0001] This invention relates to the field of pesticide spraying technology, specifically a reverse spraying structure for treating diseases on the underside of pear leaves. Background Technology

[0002] Black spot disease in pear trees primarily infects the undersides of leaves. Conventional fruit tree spraying devices typically spray from top to bottom or side to the leaves, making it difficult for the pesticide to adhere effectively to the undersides, resulting in poor control. It is necessary to position the nozzle below the plant and spray upwards so that the pesticide acts directly on the undersides of the leaves. However, in most cases, only a single spray tank is used, allowing only one type of pesticide to be sprayed continuously. In actual control, it is often necessary to alternate between fungicides, insecticides, or foliar fertilizers with different mechanisms of action. If a single spray tank is used, frequent cleaning and pesticide replacement are required, leading to low work efficiency. Furthermore, most spraying devices have a fixed nozzle angle, making it difficult to achieve precise adjustment along the branch direction for different canopy heights and foliage densities in rows of pear trees, easily resulting in missed sprays or repeated spraying. Therefore, to address these issues, a reverse spraying structure for treating diseases on the undersides of pear leaves is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a reverse spraying structure for treating diseases on the underside of pear leaves, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A reverse-jet spraying structure for treating leaf underside diseases in pear trees includes a mounting chassis, a first pesticide tank, a second pesticide tank, and a spraying connection module. Both the first and second pesticide tanks are located at the top of the mounting chassis. A spraying moving mechanism is fixedly connected to the top of the mounting chassis. The spraying moving mechanism includes a moving guide rail, and a spraying adjustment mechanism is located at the top of the spraying moving mechanism. The spraying adjustment mechanism includes a pesticide tube side seat and a moving slider. The pesticide tube side seat is fixedly connected to the top of the moving slider. The spraying adjustment mechanism is located at both axial ends of the spraying connection module. The spraying connection module includes a spray pipe and a spray nozzle. The spray pipe has a spray nozzle and a dividing sealing plate. Both ends of the spray pipe are connected to a joint flange. The joint flange is rotatably connected to the inner side of the spray pipe seat via a bearing. A connecting pipe is connected to the joint flange. The first and second drug boxes are connected to the joint flanges at different positions via the connecting pipe. The spray pipe has a spray nozzle on its circumferential surface. A dividing sealing plate is slidably connected to the inner side of the spray pipe. The dividing sealing plate divides the inner cavity of the spray pipe into two non-communicating chambers. A spray module is provided on the outer side of the spray connection module. The spray module includes a nozzle sleeve and a fan-shaped nozzle fixedly connected to the nozzle sleeve.

[0006] Preferably, a positioning lug is fixedly connected to the side of the movable slider. Both the movable slider and the positioning lug are slidably connected to the inner side of the movable guide rail. A movable screw is rotatably connected to the inner side of the movable guide rail. The movable screw passes through the inner side of the positioning lug and is threadedly connected to it. A movable motor is fixedly connected to the inner side of the movable guide rail. The end of the main shaft of the movable motor is fixedly connected to the movable screw. The movable motor drives the movable screw to rotate, causing the positioning lug and the movable slider to slide along the movable guide rail, thereby realizing the linear movement of the spraying connection module and the spraying module, and thus adjusting the spraying position.

[0007] Preferably, both ends of the partition sealing plate are fixedly connected with flange plugs. The shape of the flange plugs is in a pluggable sealing fit with the inner wall surface of the connector flange. A sealing ring is embedded in the circumferential surface of the partition sealing plate. The sealing ring is attached to the inner wall of the spray pipe. Through the pluggable sealing fit between the flange plugs and the connector flange, one side of the connector flange is blocked when the partition sealing plate slides, thereby realizing the switching of the liquid channel.

[0008] Preferably, the inner wall of the nozzle holder is provided with a radial hole, and a flexible insert and a positioning bead are arranged sequentially in the radial hole. The flexible insert presses the positioning bead against the outer wall of the spray tube. A spherical groove is opened on the outer circumferential surface of the spray tube. The positioning bead and the spherical groove engage with each other. By pressing the positioning bead into the spherical groove on the outer wall of the spray tube through the flexible insert, the nozzle holder is elastically engaged and positioned, which facilitates disassembly and assembly and prevents rotation.

[0009] Preferably, the inner wall of the nozzle holder is fitted with a seepage-proof ring, which is symmetrically distributed on both sides of the spray nozzle and makes a sealing contact with the outer wall of the spray pipe. The position of the fan-shaped nozzle corresponds to the spray nozzle. The seepage-proof ring and the outer wall of the spray pipe make a sealing contact to prevent the liquid from leaking from the gap between the nozzle holder and the spray pipe.

[0010] Preferably, the top of the spraying moving mechanism is fixedly connected to an intercepting bracket. The top height of the intercepting bracket is the same as the top height of the nozzle sleeve. When the nozzle sleeve is in its extreme position, it abuts against the intercepting bracket. By the intercepting bracket abutting against the nozzle sleeve when it moves to its extreme position, the rotation of the nozzle sleeve is restricted, so that the spraying pipe can rotate to close the spraying nozzle and achieve the interruption of the flow of the liquid before switching.

[0011] Preferably, an adjusting motor is fixedly connected to the inner side of the medicine tube seat, and an adjusting gear is fixedly connected to the end of the main shaft of the adjusting motor. An adjusting gear ring is fixedly connected to the outer circumferential surface of the spray tube. The adjusting gear ring meshes with the adjusting gear. The adjusting motor drives the adjusting gear to rotate the adjusting gear ring and the spray tube, thereby adjusting the circumferential spray angle of the fan-shaped nozzle and realizing multi-directional targeted spraying of the back of pear tree leaves.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. In this invention, the moving motor in the spraying moving mechanism drives the moving screw to rotate, and the moving slider moves along the moving guide rail via the positioning lug, so that the spraying connection module and the spraying module can accurately change the spraying position along the extension direction of the pear tree canopy; at the same time, the adjusting motor in the spraying adjustment mechanism drives the spraying pipe to rotate axially through the meshing of the adjusting gear and the adjusting gear ring, so that the fan-shaped nozzle sprays the liquid from below the plant upward or sideways, directly targeting the underside of the leaves mainly infected by black spot disease, improving the coverage rate of the underside of the leaves, and can adapt to different canopy heights and leaf densities for spraying adjustment, effectively avoiding missed spraying or repeated spraying.

[0014] 2. In this invention, the inner cavity of the spray pipe is divided into two independent chambers by a separating sealing plate, which are connected to two drug tanks respectively. When it is necessary to switch the drug solution, the nozzle sleeve moves to the limit position and abuts against the interception bracket. The motor drives the spray pipe to rotate so that the spray nozzle and the fan-shaped nozzle are misaligned and closed. At this time, new drug solution is pumped into the spray pipe. The drug solution pressure pushes the separating sealing plate to slide to the other end, so that the flange plug seals the joint flange on the original drug solution side. There is no need for external valves or manual cleaning and drug replacement, which improves the operational efficiency of integrated pest management in pear orchards. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 For the present invention Figure 1 A schematic diagram of the structure at point A;

[0017] Figure 3 This is a schematic diagram of the internal structure of the spraying moving mechanism of the present invention;

[0018] Figure 4 For the present invention Figure 3 A schematic diagram of the structure at point B;

[0019] Figure 5 This is a schematic diagram of the installation structure of the spraying adjustment mechanism of the present invention;

[0020] Figure 6 This is a schematic diagram of the internal structure of the spraying connection module of the present invention;

[0021] Figure 7 This is a schematic diagram of the internal structure of the spraying module of the present invention;

[0022] Figure 8 This is a schematic diagram of the physical structure of the present invention.

[0023] In the diagram: 1. Mounting chassis; 2. First medicine box; 3. Second medicine box; 4. Spraying moving mechanism; 401. Moving guide rail; 402. Moving motor; 403. Moving screw; 5. Spraying adjustment mechanism; 501. Medicine tube side seat; 502. Moving slider; 503. Positioning lug; 504. Adjusting motor; 505. Adjusting gear; 6. Spraying connection module; 601. Spraying pipe; 602. Connector flange; 603. Adjusting gear ring; 604. Spray nozzle; 605. Separating sealing plate; 606. Flange plug; 7. Spraying module; 701. Nozzle holder; 702. Fan-shaped nozzle; 703. Positioning retaining bead; 8. Interception bracket; 9. Connecting pipe. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1-8 The present invention provides a technical solution:

[0026] A reverse spraying structure for treating leaf underside diseases in pear trees includes a mounting base 1, a first pesticide tank 2, a second pesticide tank 3, a spraying moving mechanism 4, a spraying adjustment mechanism 5, a spraying connection module 6, spraying modules 7, an intercepting bracket 8, and a connecting pipe 9. The first pesticide tank 2 and the second pesticide tank 3 are fixed side-by-side to the top of the mounting base 1, each used to hold different types of pesticide solutions. The spraying moving mechanism 4 is fixedly connected to the middle of the top of the mounting base 1. The spraying adjustment mechanism 5 is located above the spraying moving mechanism 4 and is connected to both axial ends of the spraying connection module 6. Spraying modules 7 are fitted onto the outer side of the spraying connection module 6. Each spraying module 7 can be independently installed and removed. An intercepting bracket 8 is also fixed to the top of the spraying moving mechanism 4 to limit the movement when switching pesticide solutions.

[0027] The spraying moving mechanism 4 includes a horizontally extending moving guide rail 401, a moving motor 402, and a moving screw 403. A sliding groove is formed on the inner side of the moving guide rail 401. The moving screw 403 is rotatably supported by bearings at both ends of the moving guide rail 401. The axis of the moving screw 403 is parallel to the length direction of the moving guide rail 401. The moving motor 402 is fixedly installed at one end of the moving guide rail 401, and its main shaft end is fixedly connected to the moving screw 403 through a coupling.

[0028] The spraying adjustment mechanism 5 includes a medicine tube side seat 501, a movable slider 502, a positioning lug 503, an adjustment motor 504, and an adjustment gear 505. The bottom of the movable slider 502 is embedded in the groove of the movable guide rail 401. Positioning lugs 503 are fixed on both sides of the movable slider 502. The positioning lugs 503 have threaded holes that cooperate with the movable screw 403. The movable screw 403 passes through the threaded holes of the positioning lugs 503. When the movable motor 402 drives the movable screw 403 to rotate, the positioning lugs 503 drive the movable slider 502 to make linear reciprocating motion along the movable guide rail 401. The top of the movable slider 502 is integrally formed or fixedly connected to the medicine tube side seat 501. The adjustment motor 504 is fixedly installed on the inner side of the medicine tube side seat 501. The adjustment gear 505 is fixed on the main shaft of the adjustment motor 504.

[0029] The spraying connection module 6 includes a spraying pipe 601, a connector flange 602, an adjusting gear ring 603, a spray nozzle 604, a separating sealing plate 605, and a flange plug 606. The spraying pipe 601 is a hollow cylindrical pipe with connector flanges 602 welded to both axial ends. Each connector flange 602 is rotatably connected to the pipe side seat 501, allowing the entire spraying connection module 6 to rotate freely relative to the pipe side seat 501. An adjusting gear ring 603 is fixedly fitted onto the outer circumference of the spraying pipe 601. The adjusting gear ring 603 meshes with the adjusting gear 505 on the main shaft of the adjusting motor 504. When the adjusting motor 504 is working, the gear ring transmits power to the user. The spray pipe 601 is driven to rotate around its own axis. Spray nozzles 604 are arranged axially at intervals on the circumferential surface of the spray pipe 601. A partition sealing plate 605 is slidably installed in the inner cavity of the spray pipe 601. Two elastic sealing rings are embedded on the circumferential surface of the partition sealing plate 605. The sealing rings are tightly fitted to the inner wall of the spray pipe 601, thereby dividing the inner cavity of the spray pipe 601 into two non-communicating chambers, left and right. A flange plug 606 is fixedly connected to the left and right ends of the partition sealing plate 605, respectively. The outer contour shape of the flange plug 606 is adapted to the inner wall shape of the connector flange 602 and can be inserted into the connector flange 602 to form a sealing fit.

[0030] Two connector flanges 602 are connected to the first medicine tank 2 and the second medicine tank 3 respectively through connecting pipes 9. The left connector flange 602 is connected to the outlet of the first medicine tank 2 through the left connecting pipe 9, and the right connector flange 602 is connected to the outlet of the second medicine tank 3 through the right connecting pipe 9. An external pump is installed on the connecting pipe 9 as the power source for spraying, which pumps the liquid medicine into the spraying pipe 601.

[0031] Each spraying module 7 includes a nozzle holder 701, a fan-shaped nozzle 702, a positioning bead 703, and a flexible insert sleeve. The nozzle holder 701 is fitted onto the outside of the spraying tube 601. The fan-shaped nozzle 702 is fixedly installed on the top of the nozzle holder 701. The inlet of the fan-shaped nozzle 702 communicates with the inside of the nozzle holder 701. When the nozzle holder 701 is installed in place, the position of the fan-shaped nozzle 702 corresponds exactly to the spray port 604 on the spraying tube 601. A radial hole is opened on the inner wall of the nozzle holder 701. The flexible insert sleeve and the positioning bead 703 are installed in the radial hole. The flexible insert sleeve is made of rubber material and always presses the positioning bead 703 against the spraying tube 601. On the outer wall, a spherical groove is provided at a corresponding position on the outer circumference of the spray pipe 601. When the nozzle holder 701 rotates axially along the spray pipe 601 to a suitable position, the positioning bead 703 is engaged in the spherical groove under the elastic force of the flexible sleeve, providing axial positioning resistance and thus preventing the nozzle holder 701 from rotating. Two anti-seepage rings are embedded in the inner wall of the nozzle holder 701. The two anti-seepage rings are located on both sides of the spray port 604 and form a sliding seal with the outer wall of the spray pipe 601 to prevent the liquid from leaking from the gap between the nozzle holder 701 and the spray pipe 601.

[0032] The interceptor bracket 8 is fixedly connected to the top of the spraying moving mechanism 4. The top height of the interceptor bracket 8 is the same as the top height of the nozzle sleeve 701. When the moving slider 502 drives the entire spraying connection module 6 and spraying module 7 to the limit position of its stroke, the outer end face of the nozzle sleeve 701 will abut against the interceptor bracket 8. At this time, if the adjusting motor 504 drives the spraying pipe 601 to rotate, the nozzle sleeve 701 will be prevented from rotating by the interceptor bracket 8, and a relative rotation will occur between the spraying pipe 601 and the nozzle sleeve 701, causing the spraying port 604 to be misaligned with the liquid inlet of the fan-shaped nozzle 702, thereby closing the spraying channel.

[0033] The specific process of conventional reverse spraying operation in this embodiment of the present invention is as follows: First, the entire device is moved to the space between the rows of pear trees so that the spraying module 7 is located below the pear tree canopy. The external pump is started to pump the liquid medicine in the first medicine tank 2 into the left chamber of the spraying pipe 601 through the connecting pipe 9. The liquid medicine in the left chamber is sprayed upward or sideways onto the back of the pear tree leaves through the spraying nozzle 604 and the fan-shaped sprayer 702. The moving motor 402 is started, and the moving screw 403 drives the spraying adjustment mechanism 5 to move slowly along the moving guide rail 401, so that the spraying module 7 moves to spray along the extension direction of the pear tree canopy. At the same time, according to the leaf back orientation of the leaves at different heights of the pear tree, the adjusting motor 504 is started, and the spraying pipe 601 is driven to rotate to a suitable angle through the adjusting gear 505 and the adjusting gear ring 603, so that the fan-shaped nozzle 702 is always aligned with the leaf back at the best angle.

[0034] The specific process of switching the liquid medicine in this embodiment of the present invention is as follows: First, the moving motor 402 drives the spraying adjustment mechanism 5 to move to the limit position, so that the nozzle sleeve 701 abuts against the interception bracket 8. Then, the adjustment motor 504 is started, so that the spraying pipe 601 rotates a certain angle relative to the nozzle sleeve 701. At this time, the spraying port 604 is misaligned with the fan-shaped nozzle 702, the spraying channel is closed, and the liquid medicine cannot be sprayed out. The external pump on one side of the first medicine tank 2 is stopped, and the external pump on one side of the second medicine tank 3 is started at the same time. The liquid medicine in the second medicine tank 3 enters the right chamber of the spraying pipe 601 through the right connecting pipe 9. As the pressure in the right chamber increases, the liquid medicine pushes the partition sealing plate 605 to slide to the left. When it slides to the leftmost end, the flange plug 606 at the left end is inserted into the inner wall of the left connector flange 602, sealing the left connector flange 602. At the same time, the sealing ring on the partition sealing plate 605 ensures that the left and right chambers are completely isolated. At this point, the inner cavity of the spray pipe 601 is only connected to the second medicine tank 3. The adjusting motor 504 is restarted and rotated in the opposite direction, causing the spray pipe 601 to return to its original position. The spray nozzle 604 and the fan-shaped nozzle 702 are realigned, and the positioning bead 703 engages with the spherical slot to complete the reset. The medicine in the second medicine tank 3 can then be sprayed normally. When switching back from the second medicine tank 3 to the first medicine tank 2, the device needs to be moved to the other extreme position, and the above steps must be reversed.

[0035] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reverse spraying structure for treating diseases on the underside of pear leaves, comprising a mounting chassis (1), a first drug tank (2), a second drug tank (3), and a spraying connection module (6), wherein the first drug tank (2) and the second drug tank (3) are both disposed on the top of the mounting chassis (1), characterized in that: The top of the mounting chassis (1) is fixedly connected to a spraying moving mechanism (4). The spraying moving mechanism (4) includes a moving guide rail (401). The top of the spraying moving mechanism (4) is provided with a spraying adjustment mechanism (5). The spraying adjustment mechanism (5) includes a pipe side seat (501) and a moving slider (502). The pipe side seat (501) is fixedly connected to the top of the moving slider (502). The spraying adjustment mechanism (5) is located at both axial ends of the spraying connection module (6). The spraying connection module (6) includes a spraying pipe (601), a spray nozzle (604), and a separating sealing plate (605). Both axial ends of the spraying pipe (601) are connected to a joint flange (602). The joint flange (602) is connected to... The bearing is rotatably connected to the inner side of the medicine tube seat (501). The connector flange (602) is connected to the connecting pipe (9). The first medicine box (2) and the second medicine box (3) are connected to the connector flange (602) at different positions through the connecting pipe (9). The circumferential surface of the spray pipe (601) is provided with a spraying port (604). The inner side of the spray pipe (601) is slidably connected to a partition sealing plate (605). The partition sealing plate (605) divides the inner cavity of the spray pipe (601) into two non-communicating chambers. The outer side of the spraying connection module (6) is provided with a spraying module (7). The spraying module (7) includes a nozzle sleeve (701) and a fan-shaped nozzle (702) fixedly connected to the nozzle sleeve (701).

2. The reverse spraying structure for treating diseases on the underside of pear leaves according to claim 1, characterized in that: The movable slider (502) is fixedly connected to a positioning lug (503) on its side. Both the movable slider (502) and the positioning lug (503) are slidably connected to the inner side of the movable guide rail (401). The inner side of the movable guide rail (401) is rotatably connected to a movable screw (403). The movable screw (403) passes through the inner side of the positioning lug (503) and is threadedly connected to the positioning lug (503). The inner side of the movable guide rail (401) is fixedly connected to a movable motor (402). The end of the main shaft of the movable motor (402) is fixedly connected to the movable screw (403).

3. The reverse spraying structure for treating diseases on the underside of pear leaves according to claim 1, characterized in that: Both ends of the partition sealing plate (605) are fixedly connected with flange plugs (606). The shape of the flange plugs (606) is in a pluggable sealing fit with the inner wall surface of the joint flange (602). A sealing ring is embedded in the circumferential surface of the partition sealing plate (605), and the sealing ring is attached to the inner wall of the spray pipe (601).

4. The reverse spraying structure for treating diseases on the underside of pear leaves according to claim 1, characterized in that: The inner wall of the nozzle holder (701) is provided with a radial hole, and a flexible insert and a positioning bead (703) are arranged in sequence in the radial hole. The flexible insert presses the positioning bead (703) against the outer wall of the spray tube (601). The outer circumferential surface of the spray tube (601) is provided with a spherical groove, and the positioning bead (703) engages with the spherical groove.

5. The reverse spraying structure for treating diseases on the underside of pear leaves according to claim 1, characterized in that: The inner wall of the nozzle holder (701) is fitted with an anti-seepage ring, which is symmetrically distributed on both sides of the spray nozzle (604) and seals against the outer wall of the spray pipe (601). The position of the fan-shaped nozzle (702) corresponds to the spray nozzle (604).

6. The reverse spraying structure for treating diseases on the underside of pear leaves according to claim 1, characterized in that: The top of the spraying moving mechanism (4) is fixedly connected to an intercepting bracket (8). The top height of the intercepting bracket (8) is the same as the top height of the nozzle sleeve (701). When the nozzle sleeve (701) is in the extreme position of movement, it abuts against the intercepting bracket (8).

7. The reverse spraying structure for treating diseases on the underside of pear leaves according to claim 1, characterized in that: An adjusting motor (504) is fixedly connected to the inner side of the medicine tube side seat (501). An adjusting gear (505) is fixedly connected to the end of the main shaft of the adjusting motor (504). An adjusting gear ring (603) is fixedly connected to the outer circumference of the spray tube (601). The adjusting gear ring (603) meshes with the adjusting gear (505).

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