A plant protection drone

Abstract

The present invention discloses a plant protection drone, comprising: a body, a plurality of spiral blades are evenly arranged on the side wall of the body, a support frame and a medicine storage box are arranged below the body, a spraying mechanism is connected to the side wall of the medicine storage box, and the spraying mechanism is used to spray out the mixed liquid medicine in the medicine storage box; wherein the medicine storage box comprises an upper box body and a lower box body connected to each other, at least two liquid storage chambers for storing a single liquid medicine are arranged in the upper box body, a mixing liquid chamber for mixing multiple liquid medicines is arranged in the lower box body, a puncture conduction structure is arranged between the liquid storage chamber and the mixing liquid chamber, and a positioning block and a driving device are arranged in the liquid storage chamber. The plant protection drone drives the positioning block to carry the medicine bottle close to the puncture conduction structure through the driving device, punctures the medicine bottle so that the liquid medicine flows into the mixing liquid chamber of the lower box body through the puncture conduction structure, and realizes the automatic mixing of multiple liquid medicines. This instant mixing method avoids the reduction of drug efficacy or adverse reactions that may be caused by long-term pre-mixing.

Description

Technical Field

[0001] The invention relates to the technical field of drone pesticide spraying, and in particular to a crop protection drone. Background Art

[0002] Plant protection drones, as an important part of modern agricultural technology, are intelligent agricultural machinery that integrates drone flight technology and pesticide spraying technology. Such drones are usually equipped with advanced navigation systems, flight control systems, and spraying devices. They can fly autonomously at low altitudes and spray pesticides on farmland accurately and efficiently. Compared with traditional manual spraying or ground mechanical spraying methods, plant protection drones have the advantages of high operating efficiency, wide coverage area, flexible operation, and saving manpower and material resources. Through precise flight path planning and spraying amount control, plant protection drones can ensure that pesticides are evenly distributed on crop leaves, improve pesticide utilization, and reduce environmental pollution. They are an indispensable tool for modern precision agriculture.

[0003] Although plant protection drones have shown great potential and advantages in agricultural production, the plant protection drones currently on the market still have some shortcomings in terms of pesticide mixing and application. Specifically, for specific farmlands that require a mixture of multiple different types of pesticides, existing plant protection drones often use pre-mixed pesticide solutions for spraying. Due to the different chemical reactions and stability requirements between different pesticides, long-term pre-mixing may lead to reduced efficacy or adverse reactions, affecting the final pest control effect. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a plant protection drone to solve the technical problem that the existing plant protection drones often use pre-mixed pesticide solutions for spraying. Due to the different chemical reactions and stability requirements between different pesticides, long-term pre-mixing may lead to reduced efficacy or adverse reactions, affecting the final insecticide control effect.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The embodiment of the present invention provides a plant protection drone, comprising: a body, a plurality of spiral blades are evenly arranged on the side wall of the body, a support frame and a medicine storage box are arranged below the body, a spraying mechanism is connected to the side wall of the medicine storage box, and the spraying mechanism is used to spray the mixed liquid medicine in the medicine storage box;

[0007] The medicine storage box comprises an upper box body and a lower box body connected to each other from top to bottom, the upper box body is provided with at least two liquid storage chambers for storing a single liquid medicine, the lower box body is provided with a mixing chamber for mixing multiple liquid medicines, a puncture conduction structure is provided between the liquid storage chamber and the mixing chamber, a positioning block and a driving device are provided in the liquid storage chamber, the positioning block is slidably connected to the cavity wall of the liquid storage chamber along the vertical direction, and a positioning groove for placing a medicine bottle is provided on the positioning block, and the driving device is used to drive the positioning block to approach or move away from the puncture conduction structure;

[0008] When the driving device receives a driving instruction, the positioning block is driven to carry the medicine bottle to synchronously approach the puncture conductive structure, so that the puncture conductive structure punctures the medicine bottle, and the medicine liquid in the medicine bottle can flow into the mixing liquid chamber through the puncture conductive structure;

[0009] The lower box body is an upper opening structure, and the piercing conductive structure penetrates through the lower side wall of the upper box body and the upper opening of the lower box body and respectively penetrates into the liquid storage chamber and the liquid mixing chamber;

[0010] The liquid mixing chamber is provided with a gravity conduction mechanism, the gravity conduction mechanism divides the liquid mixing chamber into an upper liquid mixing process chamber and a lower liquid mixing completion chamber, the lower end of the puncture conduction structure is inserted into the liquid mixing process chamber, and the spraying mechanism is used to spray the mixed liquid in the liquid mixing completion chamber;

[0011] Among them, when the mixed liquid in the mixing process chamber is less than a preset weight, the gravity conduction mechanism isolates the mixing process chamber from the mixing completion chamber; when the mixed liquid in the mixing process chamber is equal to or greater than the preset weight, the gravity conduction mechanism conducts the mixing process chamber with the mixing completion chamber.

[0012] Further, the upper box body is detachably connected to the lower side of the machine body, the lower box body is detachably connected to the lower side of the upper box body, the upper side of the upper box body is provided with an upper opening and an upper rotating door corresponding to the liquid storage chamber one by one, the upper rotating door corresponds to the shape of the upper opening and is rotatably connected to the upper opening, and the upper rotating door rotates to open or close the upper opening;

[0013] The medicine bottle is a disposable plastic product, and a closed diaphragm is provided at the bottle mouth of the medicine bottle. The medicine bottle is inserted into the positioning groove with the bottle mouth facing downward. The positioning groove is a through groove that is opened on the positioning block and penetrates from top to bottom. The positioning groove has the same shape as the medicine bottle. When the positioning block drives the medicine bottle to synchronously approach the puncture conduction structure, the puncture conduction structure punctures the closed diaphragm to probe into the medicine bottle.

[0014] Furthermore, a stopper is provided on the upper side of the positioning block, and the stopper is slidably connected to the positioning block to approach or move away from the upper end notch of the positioning groove, and when the stopper slides to a first position close to the upper end notch of the positioning groove, at least a portion of the stopper coincides with a projection of the upper end notch of the positioning groove in the vertical direction, so that the stopper limits the axial movement of the medicine bottle placed in the positioning groove; when the stopper slides to a second position away from the upper end notch of the positioning groove, all parts of the stopper are separated from the projection of the upper end notch of the positioning groove in the vertical direction, so that the stopper releases the axial movement limit on the medicine bottle placed in the positioning groove.

[0015] Furthermore, the puncture conduction structure is a hollow needle body, the upper end of the needle body is located in the liquid storage cavity, and the lower end of the needle body is located in the liquid mixing cavity;

[0016] The driving device is a telescopic rod, the fixed end of which is connected to the inner cavity wall of the liquid storage cavity, and the telescopic end of which is vertically oriented and connected to the positioning block.

[0017] Further, the gravity conduction mechanism includes: a fixed plate, a movable plate, and a plurality of first springs connected between the fixed plate and the movable plate, the fixed plate is horizontally fixedly arranged in the liquid mixing chamber, the liquid mixing completion chamber is below the fixed plate, the movable plate is slidably connected to the inner cavity wall of the liquid mixing chamber along the vertical direction, and the liquid mixing process chamber is above the movable plate;

[0018] A first pipe connected to the liquid mixing completion chamber is arranged on the upper side of the fixed plate toward the movable plate, and a second pipe connected to the liquid mixing process chamber is arranged on the lower side of the movable plate toward the fixed plate. The first pipe and the second pipe are coaxially opposite to each other in the upper and lower directions, and the diameter of the first pipe is larger than the diameter of the second pipe.

[0019] A trigger structure is provided in the first pipe, and a response structure is provided in the second pipe. When the mixed liquid in the mixing process chamber is equal to or greater than a preset weight, the movable plate is pressed by the gravity of the mixed liquid in the mixing process chamber to press the first spring to approach the fixed plate, and the second pipe is inserted into the first pipe. The trigger structure in the first pipe is inserted into the second pipe and abuts against the response structure. The response structure is controlled to conduct the second pipe, and the first pipe is connected to the second pipe.

[0020] Furthermore, the trigger structure includes a support plate extending radially inward from the inner wall of the first pipe, at least two of the support plates intersect in the first pipe, and an abutment column extends axially toward the second pipe at the intersection of the support plates, and a first flow gap for the passage of liquid medicine is formed between the support plates. When the abutment column abuts against the response structure, the liquid medicine flowing out of the second pipe passes through the first flow gap and flows toward the mixing completion chamber.

[0021] Further, the response structure includes a support ring extending axially from the inner circumference of the lower end of the second pipe toward the inside of the second pipe, a sealing sheet made of silicone material is provided on the side of the support ring facing the inside of the second pipe, a spring groove is axially opened on the side of the support ring facing the inside of the second pipe, a second spring is provided in the spring groove, one end of the second spring is connected to the spring groove body, and the other end is connected to the sealing sheet, the second spring is used to provide tension for the sealing sheet so that the sealing sheet fits the upper end of the support ring; an abutment sheet is provided on the side of the sealing sheet facing the abutment column, and the abutment sheet is connected to the sealing sheet through a vertical connecting column;

[0022] When the movable plate is pressed by the gravity of the mixed liquid in the liquid mixing process chamber to press the first spring to approach the fixed plate, the second pipe is inserted into the first pipe, and the abutment column abuts the abutment sheet. As the movable plate gradually approaches the fixed plate, the sealing sheet is overcome by the abutment sheet to overcome the tension of the second spring and move away from the support ring. The sealing sheet is separated from the support ring and a second flow gap for circulating liquid is formed therebetween. The liquid in the second pipe flows toward the liquid mixing completion chamber through the second flow gap and the first flow gap.

[0023] Furthermore, a first magnetic material is provided on the pipe opening at the lower end of the second pipe, and a second magnetic material is provided on the support plate, and the first magnetic material and the second magnetic material are magnetically attracted to each other; when the abutment sheet contacts the abutment column and the interaction force with the abutment column is zero, the first magnetic material and the second magnetic material are separated, and the magnetic attraction force between the first magnetic material and the second magnetic material is greater than the elastic force of the first spring; when the first magnetic material and the second magnetic material are connected, the magnetic attraction force between the first magnetic material and the second magnetic material is greater than the sum of the elastic force of the first spring and the elastic force of the second spring, so that after the trigger structure triggers the response structure, the first pipe and the second pipe remain conductive.

[0024] Furthermore, a U-shaped groove for containing liquid medicine is provided on the movable plate, and the inner space of the U-shaped groove is connected to the second pipeline.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. By providing a detachable upper box and a lower box, and providing multiple liquid storage chambers in the upper box, each liquid storage chamber can independently store a kind of liquid medicine, so as to realize flexible storage and proportioning of liquid medicine, and the positioning block is driven by the driving device to carry the medicine bottle close to the puncture conduction structure, so that the puncture conduction structure punctures the medicine bottle and introduces the liquid medicine into the mixing chamber, so as to realize automatic mixing of liquid medicine, and improve the operation efficiency and flexibility of the plant protection UAV;

[0027] 2. By setting up a gravity conduction mechanism, the gravity of the mixed liquid is used to automatically control the conduction and isolation of the mixing process chamber and the mixing completion chamber, avoiding the tedious manual control of the mixing process and improving the intelligence level of the plant protection drone;

[0028] 3. Through the cooperation between the trigger structure and the response structure, precise conduction control between the mixing process chamber and the mixing completion chamber is achieved, ensuring the uniformity and stability of the mixed liquid.

[0029] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a stereoscopic view of the plant protection drone according to an embodiment of the present invention;

[0031] Figure 2 This is a front view of the plant protection drone according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the first internal structure of the medicine storage box in the plant protection drone according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the second internal structure of the medicine storage box in the plant protection drone according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the third internal structure of the medicine storage box in the plant protection drone according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the fourth internal structure of the medicine storage box in the plant protection drone according to an embodiment of the present invention;

[0036] Figure 7 A cross-sectional view of a first pipeline and a second pipeline in a plant protection drone according to an embodiment of the present invention;

[0037] Figure 8A first vertical cross-sectional view of a first pipeline and a second pipeline in a plant protection drone according to an embodiment of the present invention;

[0038] Fig. 9 for Figure 8 A magnified view of the structure in the middle;

[0039] Fig.10 A second vertical cross-sectional view of the first pipeline and the second pipeline in the plant protection drone according to an embodiment of the present invention;

[0040] Fig.11 for Fig.10 A magnified view of the structure in middle B;

[0041] Fig.12 A third vertical cross-sectional view of the first pipeline and the second pipeline in the plant protection drone according to an embodiment of the present invention;

[0042] Fig.13 for Fig.12 A magnified view of the structure in C.

[0043] Description of reference numerals:

[0044] 1. Machine body; 11. Spiral blade; 12. Support frame; 13. Spraying mechanism; 2. Medicine storage box; 21. Upper box body; 211. Liquid storage chamber; 212. Upper revolving door; 22. Lower box body; 221. Mixing chamber; 2211. Mixing process chamber; 2212. Mixing completion chamber; 3. Puncture conduction structure; 4. Positioning block; 41. Positioning groove; 42. Block; 5. Driving device; 6. Medicine bottle; 7. Gravity conduction mechanism; 71. Fixed plate; 711. First pipeline; 72. Movable plate; 721. Second pipeline; 73. First spring; 8. Trigger structure; 81. Support plate; 82. Abutment column; 83. First flow gap; 9. Response structure; 91. Support ring; 92. Sealing plate; 93. Second spring; 94. Abutment plate; 95. Vertical connecting column; 96. Second flow gap. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “resin”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating orientations or positional relationships are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0052] Please see attached Figures 1 to 13 The embodiment of the present invention provides a plant protection drone, comprising: a body 1, a plurality of spiral blades 11 are evenly arranged on the side wall of the body 1, a support frame 12 and a medicine storage box 2 are arranged below the body 1, a spraying mechanism 13 is connected to the side wall of the medicine storage box 2, and the spraying mechanism 13 is used to spray the mixed liquid medicine in the medicine storage box 2; wherein the medicine storage box 2 comprises an upper box body 21 and a lower box body 22 connected to each other from top to bottom, at least two liquid storage chambers 211 for storing a single liquid medicine are arranged in the upper box body 21, and a mixing chamber 221 for mixing multiple liquid medicines is arranged in the lower box body 22, and the liquid storage chamber 211 and the lower box body 22 are connected to each other from top to bottom. A puncture conduction structure 3 is provided between the mixing chamber 221, and a positioning block 4 and a driving device 5 are provided in the liquid storage chamber 211. The positioning block 4 is slidably connected to the cavity wall of the liquid storage chamber 211 along the vertical direction, and a positioning groove 41 for placing the medicine bottle 6 is provided on the positioning block 4. The driving device 5 is used to drive the positioning block 4 to approach or move away from the puncture conduction structure 3; when the driving device 5 receives a driving instruction, the driving positioning block 4 carries the medicine bottle 6 to synchronously approach the puncture conduction structure 3, so that the puncture conduction structure 3 punctures the medicine bottle 6, and the liquid in the medicine bottle 6 can flow into the mixing chamber 221 through the puncture conduction structure 3.

[0053] In one possible implementation, the plant protection drone includes a communication module, and the driving instruction is an instruction sent by an external device and received by the communication module. In another possible implementation, the plant protection drone includes a control module and a GPS positioning module, and when the control module identifies the current position as a preset position through the GPS positioning module, the driving instruction is issued. The preset position can be a position where the straight-line distance between the current position and the position where the liquid medicine needs to be sprayed is less than the preset distance.

[0054] In this embodiment, multiple spiral blades 11 evenly arranged on the side wall of the body 1 generate lift and forward power through rotation, so that the drone can fly and hover stably. The medicine storage box 2 is divided into two parts, the upper box 21 is used to store a single liquid medicine, the lower box 22 is used to mix the liquid medicine, and the spraying mechanism 13 is responsible for spraying the mixed liquid medicine evenly on the crops. The puncture conduction structure 3 provided between the liquid storage chamber 211 and the mixing liquid chamber 221 is used to puncture the medicine bottle 6 and guide the liquid medicine to flow into the mixing liquid chamber 221. The positioning block 4 is used to fix the medicine bottle 6 and slide in the vertical direction through the driving device 5 to approach or move away from the puncture conduction structure 3. In a working process using a plant protection drone, medicine bottles 6 containing different liquid medicines are first placed in the positioning grooves 41 of the positioning block 4 in different liquid storage chambers 211 in the upper box 21, and then the plant protection drone is controlled to take off. When it is necessary to mix the liquid medicines, the driving device 5 is started to drive the positioning block 4 to carry the medicine bottle 6 close to the puncture conduction structure 3, and the puncture conduction structure 3 punctures the medicine bottle 6, so that the liquid medicine flows into the mixing liquid chamber 221 of the lower box 22. As needed, multiple medicine bottles 6 can be punctured in sequence, and different liquid medicines can be mixed together in the mixing liquid chamber 221. The mixed liquid medicine is then evenly sprayed onto the crops through the spraying mechanism 13. Through the mixing liquid chamber 221 of the lower box 22 and the puncture conduction structure 3, automatic mixing of multiple liquid medicines is achieved. In addition, since the liquid medicines can be mixed on demand, the problem of reduced efficacy or adverse reactions that may occur during pre-mixing is avoided. It should be explained that the plant protection drone is controlled by a terminal device, which may be a mobile phone, a computer, or a handle, etc. The terminal device for controlling the plant protection drone of this embodiment is provided with a control button corresponding to the drive device 5 in each liquid storage cavity 211, and the operation of the drive device 5 in different liquid storage cavities 211 can be controlled by operating the control button. It can be understood that the composition and weight of the liquid in each medicine bottle 6 are prepared in the preparation stage before using the plant protection drone, and the user can configure it according to actual needs, which will not be described in detail here.

[0055] Furthermore, in order to simplify the pesticide loading process, improve loading efficiency, reduce the risk of pesticide residues and cross contamination, and ensure the safety and accuracy of pesticide use, the upper box body 21 in this embodiment is detachably connected to the lower side of the body 1, and the lower box body 22 is detachably connected to the lower side of the upper box body 21. The upper side of the upper box body 21 is provided with an upper opening and an upper revolving door 212 corresponding to the liquid storage chamber 211. The upper revolving door 212 corresponds to the shape of the upper opening and is rotatably connected to the upper opening. The upper revolving door 212 rotates to open or close the upper opening; the medicine bottle 6 is a disposable plastic product, and a closed diaphragm is provided at the bottle mouth of the medicine bottle 6. The medicine bottle 6 is inserted into the positioning groove 41 with the bottle mouth facing downward. The positioning groove 41 is a through groove that is opened on the positioning block 4 from top to bottom. The positioning groove 41 has the same shape as the medicine bottle 6. When the positioning block 4 drives the medicine bottle 6 to synchronously approach the puncture conduction structure 3, the puncture conduction structure 3 punctures the closed diaphragm to probe into the medicine bottle 6.

[0056] It can be understood that the detachable connection method adopted between the upper box body 21 and the body 1, and the lower box body 22 and the upper box body 21 can be a bolt connection, a snap connection, etc., which is convenient for disassembly and cleaning between the body 1, the upper box body 21 and the lower box body 22; the upper opening can be conveniently opened or closed by rotating the upper revolving door 212, which is convenient for loading and removing the medicine bottle 6 in the liquid storage chamber 211 of the upper box body 21; the positioning groove 41 can ensure that the medicine bottle 6 is stably inserted in the positioning groove 41, and the insertion method of the medicine bottle 6 with the bottle mouth facing downward is convenient for piercing the conduction structure 3 and piercing the closed diaphragm from the bottom to enter the medicine bottle 6. A closed diaphragm is provided at the bottle mouth of the medicine bottle 6, which is used to maintain the sealing of the medicine liquid when the medicine bottle 6 is not in use to prevent the medicine liquid from volatilization or contamination. During the operation of the plant protection drone, the user can open the upper revolving door 212, and insert the disposable plastic medicine bottles 6 containing different liquid medicines into the corresponding positioning grooves 41 with the mouths facing downwards, and then close the upper revolving door 212 and install the upper box 21, the lower box 22, and the body 1 respectively. When the liquid medicine needs to be mixed, the driving device 5 is started, and the positioning block 4 is driven to carry the medicine bottle 6 to synchronously approach the puncture conduction structure 3, and the puncture conduction structure 3 punctures the closed diaphragm of the medicine bottle 6 from below, so that the liquid medicine flows into the mixing chamber 221 of the lower box 22. The mixed liquid medicine is evenly sprayed on the crops through the spraying mechanism 13. After the operation is completed, the upper box 21 and the lower box 22 can be disassembled for cleaning and disinfection for the next use.

[0057] Furthermore, a stopper 42 is provided on the upper side of the positioning block 4, and the stopper 42 is slidably connected to the positioning block 4 to approach or move away from the upper end notch of the positioning groove 41. When the stopper 42 slides to a first position close to the upper end notch of the positioning groove 41, the stopper 42 at least partially coincides with the projection of the upper end notch of the positioning groove 41 in the vertical direction, so that the stopper 42 limits the axial movement of the medicine bottle 6 placed in the positioning groove 41; when the stopper 42 slides to a second position away from the upper end notch of the positioning groove 41, all parts of the stopper 42 are separated from the projection of the upper end notch of the positioning groove 41 in the vertical direction, so that the axial movement limit of the medicine bottle 6 placed in the positioning groove 41 by the stopper 42 is released.

[0058] In this embodiment, the stopper 42 is connected to the positioning block 4 through a sliding groove, etc., so that it can slide on the positioning block 4 in a specific direction to approach or move away from the upper end notch of the positioning groove 41. During the sliding process, the position of the stopper 42 relative to the upper end notch of the positioning groove 41 will change. When the stopper 42 approaches the upper end notch of the positioning groove 41 to the first position, at least part of it will overlap with the projection of the upper end notch of the positioning groove 41 in the vertical direction, thereby forming an axial movement limit for the medicine bottle 6 placed in the positioning groove 41; when the stopper 42 moves away from the upper end notch of the positioning groove 41, all parts of it will separate from the projection of the upper end notch of the positioning groove 41 in the vertical direction, thereby releasing the axial movement limit of the medicine bottle 6. By controlling the sliding position of the stopper 42, the limiting and releasing operations of the medicine bottle 6 can be realized. Generally, the sliding of the stopper 42 is realized by manual operation. Specifically, before loading the medicine bottle 6, the stopper 42 should be in the second position away from the upper notch of the positioning groove 41, so that the medicine bottle 6 can be smoothly inserted into the positioning groove 41. When the medicine bottle 6 is inserted into the positioning groove 41 and reaches the predetermined position, the stopper 42 is manually operated to slide to the first position close to the upper notch of the positioning groove 41. At this time, the stopper 42 at least partially overlaps with the projection of the upper notch of the positioning groove 41 in the vertical direction, forming an axial movement limit for the medicine bottle 6. During flight or operation, the medicine bottle 6 is stably fixed in the positioning groove 41 and will not fall off or shift due to vibration or external force. After the operation is completed, the stopper 42 is manually operated to slide to the second position away from the upper notch of the positioning groove 41 to release the axial movement limit of the medicine bottle 6, and then the upper box body 21 can be removed and the upper revolving door 212 can be opened to remove the used medicine bottle 6 from the positioning groove 41 and discard it.

[0059] Specifically, the puncture conduction structure 3 is a hollow needle body, the upper needle mouth of the needle body is located in the liquid storage chamber 211, and the lower needle mouth of the needle body is located in the mixed liquid chamber 221. When the needle body punctures the closed diaphragm of the medicine bottle 6, the medicine will flow into the mixed liquid chamber 221 along the hollow channel of the needle body; the driving device 5 is a telescopic rod, the fixed end of the telescopic rod is connected to the inner cavity wall of the liquid storage chamber 211, and the telescopic end of the telescopic rod is vertically oriented and connected to the positioning block 4. By controlling the telescopic movement of the telescopic rod, the positioning block 4 and the medicine bottle 6 fixed on the positioning block 4 can be driven to move up and down, thereby realizing the puncture operation of the needle body on the medicine bottle 6. Optionally, the puncture conduction structure 3 is detachably mounted on the upper box body 21, that is, the user can remove the old puncture conduction structure 3 and discard it, and replace it with a new puncture conduction structure 3 for use.

[0060] Furthermore, the lower box body 22 is an upper opening structure, and the piercing conduction structure 3 penetrates through the lower side wall of the upper box body 21 and the upper opening of the lower box body 22 to respectively penetrate into the liquid storage chamber 211 and the liquid mixing chamber 221; a gravity conduction mechanism 7 is provided in the liquid mixing chamber 221, and the gravity conduction mechanism 7 divides the liquid mixing chamber 221 into an upper liquid mixing process chamber 2211 and a lower liquid mixing completion chamber 2212, and the lower end of the piercing conduction structure 3 penetrates into the liquid mixing process chamber 2 In 211, the spraying mechanism 13 is used to spray out the mixed liquid in the mixing completion chamber 2212; wherein, when the mixed liquid in the mixing process chamber 2211 is less than the preset weight, the gravity conduction mechanism 7 isolates the mixing process chamber 2211 from the mixing completion chamber 2212; when the mixed liquid in the mixing process chamber 2211 is equal to or greater than the preset weight, the gravity conduction mechanism 7 conducts the mixing process chamber 2211 with the mixing completion chamber 2212. In a working process using a plant protection drone, when the telescopic rod drives the positioning block 4 and the medicine bottle 6 to move down and approach the puncture conduction structure 3, the upper needle port of the puncture conduction structure 3 punctures the closed diaphragm of the medicine bottle 6, and the liquid flows into the mixing process chamber 2211 along the hollow channel of the needle body. In the liquid mixing process chamber 2211, the liquid medicines in the medicine bottles 6 in the multiple liquid storage chambers 211 are mixed in the liquid mixing chamber 221. As the liquid medicines continue to flow in and the mixing process proceeds, the weight of the mixed liquid medicines in the liquid mixing process chamber 2211 gradually increases. When the weight of the mixed liquid medicines in the liquid mixing process chamber 2211 reaches or exceeds the preset value, the gravity conduction mechanism 7 automatically opens to connect the liquid mixing process chamber 2211 with the liquid mixing completion chamber 2212. At this time, the mixed liquid medicines flow into the liquid mixing completion chamber 2212 under the action of gravity. Subsequently, the spraying mechanism 13 starts to work and sprays the mixed liquid medicines in the liquid mixing completion chamber 2212. By adopting the gravity conduction mechanism 7, the automatic mixing and gravity separation of the liquid medicines are realized, ensuring that the mixed liquid medicines can reach the expected concentration and uniformity.

[0061] Furthermore, the gravity conduction mechanism 7 includes: a fixed plate 71, a movable plate 72 and a plurality of first springs 73 connected between the fixed plate 71 and the movable plate 72, the fixed plate 71 is horizontally fixedly arranged in the liquid mixing chamber 221, below the fixed plate 71 is the liquid mixing completion chamber 2212, the movable plate 72 is slidably connected to the inner cavity wall of the liquid mixing chamber 221 along the vertical direction, and above the movable plate 72 is the liquid mixing process chamber 2211; the upper side of the fixed plate 71 is provided with a first pipe 711 connected to the liquid mixing completion chamber 2212 toward the movable plate 72, the lower side of the movable plate 72 is provided with a second pipe 721 connected to the liquid mixing process chamber 2211 toward the fixed plate 71, and the first pipe 711 is connected to the liquid mixing completion chamber 2212. The second pipe 721 is coaxially opposed to each other up and down, and the diameter of the first pipe 711 is larger than that of the second pipe 721; a trigger structure 8 is arranged in the first pipe 711, and a response structure 9 is arranged in the second pipe 721. When the mixed liquid in the mixing process chamber 2211 is equal to or greater than the preset weight, the movable plate 72 is pressed by the gravity of the mixed liquid in the mixing process chamber 2211 to press the first spring 73 to approach the fixed plate 71, and the second pipe 721 is inserted into the first pipe 711. The trigger structure 8 in the first pipe 711 is inserted into the second pipe 721 and abuts against the response structure 9. The response structure 9 is controlled to conduct the second pipe 721, and the first pipe 711 is conducted with the second pipe 721.

[0062] In this embodiment, by utilizing the effect of gravity, when the mixed liquid in the mixing process chamber 2211 reaches or exceeds a preset weight, the movable plate 72 is pressed down to compress the first spring 73; by designing the first pipe 711 and the second pipe 721 as well as the relative positions and pipe diameter differences therebetween, when the movable plate 72 descends, the second pipe 721 can be inserted into the first pipe 711, a trigger structure 8 is provided in the first pipe 711, and a response structure 9 is provided in the second pipe 721; when the trigger structure 8 and the response structure 9 are in contact, the trigger structure 8 activates the response structure 9 to connect the second pipe 721 and allow the mixed liquid to pass through. During a working process using a plant protection drone, in an initial state, the fixed plate 71 is horizontally fixed in the mixing chamber 221, the movable plate 72 is kept at a higher position under the action of the first spring 73, and the first pipe 711 and the second pipe 721 are not in contact and are in a separated state; as the liquid medicine flows in and the mixing process proceeds, the weight of the mixed liquid medicine in the mixing process chamber 2211 gradually increases. When the mixed liquid medicine in the mixing process chamber 2211 reaches or exceeds a preset weight, the movable plate 72 is pressed down by gravity to compress the first spring 73, and at the same time, the second pipe 721 gradually approaches and is inserted into the first pipe 711. When the second pipe 721 is completely inserted into the first pipe 711, the trigger structure 8 in the first pipe 711 contacts and activates the response structure 9 in the second pipe 721. The response structure 9 is controlled to conduct the second pipe 721, allowing the mixed liquid medicine to flow from the mixing process chamber 2211 into the mixing completion chamber 2212. After the mixed liquid medicine enters the mixing completion chamber 2212, it waits for the spraying mechanism 13 to start and perform subsequent spraying operations. Through the design of the gravity conduction mechanism 7, the automatic mixing of the liquid medicine and the conduction mechanism controlled by gravity are realized, which avoids manual intervention and errors and ensures the accuracy and stability of the spraying operation.

[0063] Furthermore, the trigger structure 8 includes a support plate 81 extending radially inward from the inner wall of the first pipe 711, at least two support plates 81 intersect in the first pipe 711, and an abutment column 82 extends axially toward the second pipe 721 at the intersection of the support plates 81. A first flow gap 83 for the passage of liquid medicine is formed between the support plates 81. When the abutment column 82 abuts against the response structure 9, the liquid medicine flowing out of the second pipe 721 passes through the first flow gap 83 and flows toward the mixing completion chamber 2212.

[0064] It should be explained that, in the initial state, the support plate 81 and the abutment column 82 of the trigger structure 8 are located in the first pipe 711, maintaining a certain distance from the second pipe 721, and the first flow gap 83 remains open, but since the second pipe 721 is not inserted into the first pipe 711, the liquid medicine cannot pass directly; when the mixed liquid medicine in the mixing process chamber 2211 reaches or exceeds the preset weight, the movable plate 72 is pressed down by gravity, compressing the first spring 73, and at the same time, the second pipe 721 gradually approaches and inserts into the first pipe 711 until the abutment column 82 contacts the response structure 9. When the abutment column 82 abuts against the response structure 9, the response structure 9 is activated, allowing the liquid medicine in the second pipe 721 to flow out, and the liquid medicine passes through the first flow gap 83 and flows to the mixing completion chamber 2212. At this time, the mixing process chamber 2211 and the mixing completion chamber 2212 are connected through the first pipe 711 and the second pipe 721.

[0065] Furthermore, the response structure 9 includes a support ring 91 extending axially from the inner circumference of the lower end of the second pipe 721 toward the inside of the second pipe 721, and a sealing sheet 92 made of silicone material is provided on the side of the support ring 91 facing the inside of the second pipe 721. A spring groove is axially provided on the side of the support ring 91 facing the inside of the second pipe 721, and a second spring 93 is provided in the spring groove. One end of the second spring 93 is connected to the spring groove body, and the other end is connected to the sealing sheet 92. The second spring 93 is used to provide a pulling force for the sealing sheet 92 so that the sealing sheet 92 fits the upper end of the support ring 91. An abutting sheet 94 is provided on the side of the sealing sheet 92 facing the abutting column 82. The abutting sheet 94 It is connected to the sealing sheet 92 through a vertical connecting column 95; when the movable plate 72 is subjected to the gravity of the mixed liquid in the mixing process chamber 2211 to compress the first spring 73 to approach the fixed plate 71, the second pipe 721 is inserted into the first pipe 711, and the abutment column 82 abuts the abutment sheet 94. As the movable plate 72 gradually approaches the fixed plate 71, the sealing sheet 92 is overcome by the abutment sheet 94 to overcome the pulling force of the second spring 93 and move away from the support ring 91. The sealing sheet 92 is separated from the support ring 91 and a second flow gap 96 for circulating the liquid is formed therebetween. The liquid in the second pipe 721 flows to the mixing completion chamber 2212 through the second flow gap 96 and the first flow gap 83.

[0066] It is understandable that the support ring 91 extends axially from the inner circumference of the lower end of the second pipe 721 toward the inside of the second pipe 721 to form a stable support structure. The sealing sheet 92 is made of silicone material, has good elasticity and sealing performance, and fits the upper end ring of the support ring 91 to ensure the sealing of the liquid medicine in the untriggered state. The second spring 93 provides tension for the sealing sheet 92 to keep it in a state of being fitted to the support ring 91. The abutment sheet 94 is arranged on the side of the sealing sheet 92 facing the abutment column 82, and is connected to the sealing sheet 92 through a vertical connecting column 95. When the abutment column 82 of the trigger structure 8 abuts against the abutment sheet 94, it can transmit pressure to the sealing sheet 92, overcome the tension of the second spring 93, and separate the sealing sheet 92 from the support ring 91 to form a second flow gap 96. During a working process of using a plant protection drone, in the initial state, the sealing sheet 92 of the response structure 9 is attached to the upper ring opening of the support ring 91, and the second spring 93 provides tension for the sealing sheet 92 to ensure the sealing of the liquid medicine. At this time, the second pipe 721 is not in contact with the first pipe 711, and the liquid medicine cannot circulate; when the mixed liquid medicine in the mixing process chamber 2211 reaches or exceeds the preset weight, the movable plate 72 is pressed down by gravity to compress the first spring 73. At the same time, the second pipe 721 gradually approaches and is inserted into the first pipe 711 until the abutment column 82 of the trigger structure 8 abuts against the abutment sheet 94 of the response structure 9. As the movable plate 72 gradually approaches the fixed plate 71, the abutment column 82 continues to abut against the abutment sheet 94, transmitting pressure to the sealing sheet 92. The sealing sheet 92 is overcome by the abutment sheet 94. The tension of the second spring 93 moves away from the support ring 91 and forms a second flow gap 96 with the support ring 91. At this time, the liquid medicine in the second pipe 721 can flow through the second flow gap 96 and the first flow gap 83 to the mixing completion chamber 2212. As the liquid medicine continues to flow, the liquid medicine in the mixing completion chamber 2212 gradually accumulates, waiting for the spraying mechanism 13 to start and perform subsequent spraying operations.

[0067] Furthermore, a first magnetic material is provided on the pipe mouth at the lower end of the second pipe 721, and a second magnetic material is provided on the support plate 81, and the first magnetic material and the second magnetic material are magnetically attracted to each other; when the abutment sheet 94 contacts the abutment column 82 and the interaction force with the abutment column 82 is zero, the first magnetic material and the second magnetic material are separated, and the magnetic attraction force between the first magnetic material and the second magnetic material is greater than the elastic force of the first spring 73; when the first magnetic material and the second magnetic material are connected, the magnetic attraction force between the first magnetic material and the second magnetic material is greater than the sum of the elastic force of the first spring 73 and the elastic force of the second spring 93, so that after the trigger structure 8 triggers the response structure 9, the first pipe 711 and the second pipe 721 remain conductive.

[0068] In this embodiment, when the abutment sheet 94 contacts the abutment column 82 and the interaction force between the abutment column 82 is zero (i.e., the trigger structure 8 has triggered the response structure 9, but has not yet been subjected to the continuous pressure from the movable plate 72), the first magnetic material and the second magnetic material are separated, and the magnetic attraction force between the first magnetic material and the second magnetic material is greater than the elastic force of the first spring 73, so as to ensure that after the trigger structure 8 triggers the response structure 9, even if the first spring 73 attempts to make the movable plate 72 rise up, the magnetic attraction force can maintain the conductive state of the first pipe 711 and the second pipe 721. When the first magnetic material is connected to the second magnetic material (i.e. the trigger structure 8 completely triggers the response structure 9, and the movable plate 72 is subjected to the gravity pressure of the mixed liquid in the mixing process chamber 2211), the magnetic attraction force between the first magnetic material and the second magnetic material is designed to be greater than the sum of the elastic force of the first spring 73 and the elastic force of the second spring 93. Thus, even when the movable plate 72 is subjected to the thrust of the first spring 73 and the pulling force of the second spring 93 on the sealing plate 92, the magnetic attraction force can ensure the stable conduction of the first pipe 711 and the second pipe 721. It can be understood that once the trigger structure 8 and the response structure 9 in this embodiment are in contact in the working scenario, the movable plate 72 will be affected by the magnetic attraction of the first magnetic material and the second magnetic material and the gravity of the mixed liquid to approach the fixed plate 71, and the second pipe 721 will also approach and gradually penetrate into the first pipe 711, and until the first magnetic material set on the pipe mouth of the lower end of the second pipe 721 and the second magnetic material set on the support plate 81 are attracted and locked, the first pipe 711 and the second pipe 721 are continuously connected. This kind of connection situation needs to wait until the spraying task of the plant protection drone is completed and landed, and the staff manually or using tools to pull the movable plate 72 away from the fixed plate 71 until the abutment sheet 94 is separated from the abutment column 82, and then the elastic force of the first spring 73 and the second spring 93 can continuously block the channel between the first pipe 711 and the second pipe 721.

[0069] In another embodiment, a first magnetic material is provided on the lower end of the second pipe 721, and a second magnetic material is provided on the support plate 81. The first magnetic material and the second magnetic material are magnetically attracted to each other. Different from the previous embodiment, when the abutment sheet 94 in this embodiment contacts the abutment column 82 and the interaction force with the abutment column 82 is zero, the first magnetic material and the second magnetic material are separated, and the magnetic attraction force between the first magnetic material and the second magnetic material is less than the elastic force of the first spring 73. Thus, in this embodiment, when the first magnetic material is connected to the second magnetic material, it means that the weight of the mixed liquid in the mixing process chamber 2211 reaches a preset weight, and the sum of the gravity of the mixed liquid in the mixing process chamber 2211 and the magnetic attraction of the first magnetic material and the second magnetic material is greater than or equal to the sum of the elastic forces of the first spring 73 and the second spring 93. As the mixed liquid in the mixing process chamber 2211 flows into the mixing completion chamber 2212, the gravity gradually decreases, until the gravity of the mixed liquid in the mixing process chamber 2211 is reduced to less than the sum of the elastic forces of the first spring 73 and the second spring 93 and the difference between the magnetic attraction of the first magnetic material and the second magnetic material, the movable plate 72 will gradually move away from the fixed plate 71, the second pipe 721 will also gradually separate from the first pipe 711, the abutment sheet 94 will also move away from the abutment column 82, and the channel between the first pipe 711 and the second pipe 721 will continue to be blocked. In this embodiment, there is no need for the staff to manually detach the fixed plate 71 and the movable plate 72 after the plant protection UAV lands. As the mixed liquid in the mixing process chamber 2211 is discharged to a certain amount, the fixed plate 71 will automatically detach from the movable plate 72, and the elastic force of the first spring 73 and the second spring 93 will continuously block the channel between the first pipe 711 and the second pipe 721.

[0070] Furthermore, a U-shaped groove for containing liquid medicine is provided on the movable plate 72, and the space inside the U-shaped groove is connected to the second pipe 721. The design of the U-shaped groove helps to stabilize and accumulate the liquid medicine during the transmission process, thereby reducing splashing and leakage of the liquid medicine.

[0071] The above examples are only used to further illustrate the technical content of the present invention, so that readers can understand it more easily, but they do not mean that the implementation of the present invention is limited to this. Any technical extension or re-creation made according to the present invention is protected by the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A plant protection drone, characterized in that: It comprises: a machine body, the side wall of which is evenly provided with a plurality of spiral blades, a support frame and a medicine storage box are provided below the machine body, the side wall of the medicine storage box is connected with a spraying mechanism, and the spraying mechanism is used to spray out the mixed liquid medicine in the medicine storage box; The medicine storage box comprises an upper box body and a lower box body connected to each other from top to bottom, the upper box body is provided with at least two liquid storage chambers for storing a single liquid medicine, the lower box body is provided with a mixing chamber for mixing multiple liquid medicines, a puncture conduction structure is provided between the liquid storage chamber and the mixing chamber, a positioning block and a driving device are provided in the liquid storage chamber, the positioning block is slidably connected to the cavity wall of the liquid storage chamber along the vertical direction, and a positioning groove for placing a medicine bottle is provided on the positioning block, and the driving device is used to drive the positioning block to approach or move away from the puncture conduction structure; When the driving device receives a driving instruction, the positioning block is driven to carry the medicine bottle to synchronously approach the puncture conductive structure, so that the puncture conductive structure punctures the medicine bottle, and the medicine liquid in the medicine bottle can flow into the mixing liquid chamber through the puncture conductive structure; The lower box body is an upper opening structure, and the piercing conductive structure penetrates through the lower side wall of the upper box body and the upper opening of the lower box body and respectively penetrates into the liquid storage chamber and the liquid mixing chamber; The liquid mixing chamber is provided with a gravity conduction mechanism, the gravity conduction mechanism divides the liquid mixing chamber into an upper liquid mixing process chamber and a lower liquid mixing completion chamber, the lower end of the puncture conduction structure is inserted into the liquid mixing process chamber, and the spraying mechanism is used to spray the mixed liquid in the liquid mixing completion chamber; Wherein, when the mixed liquid in the liquid mixing process chamber is less than a preset weight, the gravity conduction mechanism isolates the liquid mixing process chamber from the liquid mixing completion chamber; when the mixed liquid in the liquid mixing process chamber is equal to or greater than a preset weight, the gravity conduction mechanism conducts the liquid mixing process chamber with the liquid mixing completion chamber; The gravity conduction mechanism comprises: a fixed plate, a movable plate and a plurality of first springs connected between the fixed plate and the movable plate, the fixed plate is horizontally fixedly arranged in the liquid mixing chamber, the liquid mixing completion chamber is below the fixed plate, the movable plate is slidably connected to the inner cavity wall of the liquid mixing chamber along the vertical direction, and the liquid mixing process chamber is above the movable plate; A first pipe connected to the liquid mixing completion chamber is arranged on the upper side of the fixed plate toward the movable plate, and a second pipe connected to the liquid mixing process chamber is arranged on the lower side of the movable plate toward the fixed plate. The first pipe and the second pipe are coaxially opposite to each other in the upper and lower directions, and the diameter of the first pipe is larger than the diameter of the second pipe. A trigger structure is provided in the first pipe, and a response structure is provided in the second pipe. When the mixed liquid in the mixing process chamber is equal to or greater than a preset weight, the movable plate is pressed by the gravity of the mixed liquid in the mixing process chamber to press the first spring to approach the fixed plate, and the second pipe is inserted into the first pipe. The trigger structure in the first pipe is inserted into the second pipe and abuts against the response structure. The response structure is controlled to conduct the second pipe, and the first pipe is conducted with the second pipe. The trigger structure includes a support plate extending radially inward from the inner wall of the first pipe, at least two of the support plates intersect in the first pipe, an abutment column extends axially toward the second pipe at the intersection of the support plates, and a first flow gap for allowing liquid medicine to pass through is formed between the support plates. When the abutment column abuts against the response structure, the liquid medicine flowing out of the second pipe passes through the first flow gap and flows toward the liquid mixing completion chamber.

2. The plant protection drone according to claim 1, characterized in that: The upper box body is detachably connected to the lower side of the machine body, and the lower box body is detachably connected to the lower side of the upper box body. The upper side of the upper box body is provided with an upper opening and an upper rotating door corresponding to the liquid storage chamber one by one. The upper rotating door corresponds to the shape of the upper opening and is rotatably connected to the upper opening. The upper rotating door rotates to open or close the upper opening. The medicine bottle is a disposable plastic product, and a closed diaphragm is provided at the bottle mouth of the medicine bottle. The medicine bottle is inserted into the positioning groove with the bottle mouth facing downward. The positioning groove is a through groove that is opened on the positioning block and penetrates from top to bottom. The positioning groove has the same shape as the medicine bottle. When the positioning block drives the medicine bottle to synchronously approach the puncture conduction structure, the puncture conduction structure punctures the closed diaphragm to probe into the medicine bottle.

3. The plant protection drone according to claim 1, characterized in that: A stopper is provided on the upper side of the positioning block, and the stopper is slidably connected to the positioning block to approach or move away from the upper end notch of the positioning groove. When the stopper slides to a first position close to the upper end notch of the positioning groove, at least a portion of the stopper coincides with a projection of the upper end notch of the positioning groove in the vertical direction, so that the stopper limits the axial movement of the medicine bottle placed in the positioning groove; when the stopper slides to a second position away from the upper end notch of the positioning groove, all parts of the stopper are separated from the projection of the upper end notch of the positioning groove in the vertical direction, so that the stopper releases the axial movement limit on the medicine bottle placed in the positioning groove.

4. The plant protection drone according to claim 1, characterized in that: The puncture conduction structure is a hollow needle body, the upper end of the needle body is located in the liquid storage cavity, and the lower end of the needle body is located in the liquid mixing cavity; The driving device is a telescopic rod, the fixed end of which is connected to the inner cavity wall of the liquid storage cavity, and the telescopic end of which is vertically oriented and connected to the positioning block.

5. The plant protection drone according to claim 1, characterized in that: The response structure comprises a support ring extending axially from the inner circumference of the lower end of the second pipe toward the inside of the second pipe, a sealing sheet made of silicone material is arranged on the side of the support ring facing the inside of the second pipe, a spring groove is axially opened on the side of the support ring facing the inside of the second pipe, a second spring is arranged in the spring groove, one end of the second spring is connected to the spring groove body, and the other end is connected to the sealing sheet, the second spring is used to provide a pulling force for the sealing sheet to make the sealing sheet fit the upper end of the support ring; an abutment sheet is arranged on the side of the sealing sheet facing the abutment column, and the abutment sheet is connected to the sealing sheet through a vertical connecting column; When the movable plate is pressed by the gravity of the mixed liquid in the liquid mixing process chamber to press the first spring to approach the fixed plate, the second pipe is inserted into the first pipe, and the abutment column abuts the abutment sheet. As the movable plate gradually approaches the fixed plate, the sealing sheet is overcome by the abutment sheet to overcome the tension of the second spring and move away from the support ring. The sealing sheet is separated from the support ring and a second flow gap for circulating liquid is formed therebetween. The liquid in the second pipe flows toward the liquid mixing completion chamber through the second flow gap and the first flow gap.

6. The plant protection drone according to claim 5, characterized in that: A first magnetic material is provided on the pipe opening at the lower end of the second pipe, and a second magnetic material is provided on the support plate, and the first magnetic material and the second magnetic material are magnetically attracted to each other; when the abutment sheet contacts the abutment column and the interaction force with the abutment column is zero, the first magnetic material and the second magnetic material are separated, and the magnetic attraction force between the first magnetic material and the second magnetic material is greater than the elastic force of the first spring; when the first magnetic material and the second magnetic material are connected, the magnetic attraction force between the first magnetic material and the second magnetic material is greater than the sum of the elastic force of the first spring and the elastic force of the second spring, so that after the trigger structure triggers the response structure, the first pipe and the second pipe remain conductive.

7. The plant protection drone according to claim 1, characterized in that: The movable plate is provided with a U-shaped groove for containing liquid medicine, and the inner space of the U-shaped groove is connected to the second pipeline.

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