A detachable pesticide spraying device

Abstract

An embodiment of the present specification provides a detachable pesticide spraying device, comprising: a medicine box assembly, including a liquid delivery pump, a box body, a liquid delivery pipe and a battery; an injection assembly, connected to the liquid delivery pipe, for spraying the medicine liquid, and the injection aperture of at least one of the injection assemblies is variable; a detection assembly, configured to be detachably connected to an operating transmission shaft of an agricultural machinery, and to detect the rotational speed of the operating transmission shaft when connected to the operating transmission shaft; a control assembly, including a main controller and a frequency converter, and the main controller is configured to control the frequency converter to adjust the pumping volume of the liquid delivery pump according to the detected rotational speed.

Description

[0001] Description of the case

[0002] This application is a divisional application filed for the Chinese application with an application date of October 20, 2023, application number 202311365151.2, and invention name “A detachable pesticide spraying device”. Technical Field

[0003] The present invention relates to the field of agricultural machinery, and in particular to a detachable pesticide spraying device. Background Art

[0004] At present, the pesticide spraying device of the rice transplanter usually sprays at a fixed spray speed. When the transplanting frequency of the rice transplanter is accelerated, it is easy for the rice seedlings below to be insufficiently sprayed with pesticides, thereby affecting the effect of the pesticides (such as insecticides, etc.) on the rice seedlings; when the transplanting speed of the rice transplanter is slowed down, it is easy for the rice seedlings below to be excessively sprayed with pesticides, thereby resulting in a waste of liquid medicine, and in severe cases, pesticide damage.

[0005] Therefore, it is necessary to propose a pesticide spraying device to solve the problem of inaccurate pesticide application amount for rice seedlings. Summary of the invention

[0006] One of the embodiments of the present specification provides a detachable pesticide spraying device, comprising: a medicine box assembly, including a liquid delivery pump, a box body, a liquid delivery pipe and a battery; an injection assembly, connected to the liquid delivery pipe, for spraying liquid medicine; a detection assembly, configured to be detachably connected to an operating transmission shaft of an agricultural machinery, and to detect the rotational speed of the operating transmission shaft when connected to the operating transmission shaft; a control assembly, including a main controller and a frequency converter, the main controller being configured to control the frequency converter to adjust the pumping volume of the liquid delivery pump according to the detected rotational speed.

[0007] In some embodiments, at least one of the injection assemblies has a variable injection aperture.

[0008] In some embodiments, at least one of the injection assemblies includes a control valve and multiple nozzles, the apertures of the multiple nozzles are different, and the control valve is configured to control the connection or closure of the multiple nozzles and the liquid delivery pipeline based on the rotation speed.

[0009] In some embodiments, after the spray assembly is connected to the agricultural machinery, the spraying directions of the spray heads with different apertures are different, which specifically includes: the spraying angle of the spray head is positively correlated with the aperture of the spray head.

[0010] In some embodiments, the spray assembly further comprises a plastically deformable hose, one end of which is connected to the control valve, and the other end of which is connected to the spray head.

[0011] In some embodiments, at least one of the injection assemblies includes a nozzle, and the nozzle includes a straight section and a tightening section. The tightening section is arranged at the end of the straight section, and the end of the tightening section forms an injection port. The radial dimension of the tightening section decreases along the direction toward the injection port; the tightening section includes an outer shell, a plurality of fan plates, an elastic layer, and a first connecting membrane and a second connecting membrane. The plurality of fan plates are distributed along the circumference of the inner wall of the tightening section and are respectively deflectably connected to the inner wall of the straight section. Adjacent fan plates are connected by the first connecting membrane, and the ends of the plurality of fan plates are connected to one end of the second connecting membrane, and the other end of the second connecting membrane is connected to the injection port. The elastic layer is arranged between the fan plate and the outer shell; the elastic layer includes sponge rubber, and the 25% compression hardness of the elastic layer is not less than 2Kpa, and the 50% compression hardness of the elastic layer is not less than 1MPa.

[0012] In some embodiments, the detection component includes a connecting portion and an encoding portion, the connecting portion is configured to detachably mount the encoding portion on the working transmission shaft of the agricultural machinery, and the encoding portion is configured to detect the rotational speed of the working transmission shaft of the agricultural machinery.

[0013] In some embodiments, the detachable pesticide spraying device further includes a first connecting member and a second connecting member, wherein the first connecting member is used to detachably connect the box to the agricultural machinery, and the second connecting member is used to hang the spraying assembly on the agricultural machinery.

[0014] In some embodiments, the agricultural machinery is a rice transplanter, and the spray assembly includes a bracket, which is used to be erected at both ends of a rice seedling storage area of ​​the rice transplanter, and the bracket includes a connecting rod detachably connected to the rice seedling storage area and a support rod spanning the rice seedling storage area, and the nozzle of the spray assembly is fixed on the support rod, and the support rod is connected to the connecting rod and can rotate around the axis of the support rod relative to the connecting rod at the connecting position; a dial and a pointer are provided at the connecting position, and the pointer is fixed relative to the support rod, and the rotation of the support rod can drive the pointer to rotate relative to the dial.

[0015] In some embodiments, the detachable pesticide spraying device also includes an image acquisition device and a processor, the image acquisition device is signal-connected to the processor, the image acquisition device can be hung in the seedling storage area to obtain plant images, the processor identifies the plant height based on the plant image, calculates the spray angle of the spray assembly according to the plant height, and sends the spray angle to an output terminal used by a user of the detachable pesticide spraying device.

[0016] According to the detachable pesticide spraying device in some of the above-mentioned embodiments, the detection component detects the rotation speed of the operation transmission shaft of the agricultural machinery, and can more accurately obtain the actual operation volume of the agricultural machinery, such as the transplanting volume, the sowing volume, etc. The control component controls the frequency converter to adjust the pumping volume of the liquid delivery pump according to the detected rotation speed, that is, the pumping volume of the liquid delivery pump is adjusted according to the actual operation volume of the agricultural machinery, so that the crops can be sprayed with liquid medicine appropriately, avoiding insect pests caused by too little liquid medicine, and avoiding drug damage caused by too much liquid medicine. Compared with the scheme of spraying according to the travel speed of the agricultural machinery, the detachable pesticide spraying device in some embodiments of this specification can improve the accuracy and uniformity of the application of the pesticide, thereby solving various problems such as insect pests or drug damage to seedlings, waste of liquid medicine, soil pollution, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0018] Figure 1 is a schematic structural diagram of a detachable pesticide spraying device according to some embodiments of this specification;

[0019] Figure 2 is a schematic diagram of the structure of the injection assembly according to some embodiments of the present specification;

[0020] Figure 3 is a schematic diagram of the structure of a spray assembly according to some embodiments of this specification;

[0021] Figure 4 is a schematic diagram of the structure of a nozzle according to some embodiments of this specification;

[0022] Figure 5 is a schematic block diagram of the structure of a detection component according to some embodiments of this specification;

[0023] Figure 6 It is a schematic diagram of a detachable pesticide spraying device and a seedling storage area according to some embodiments of the present specification.

[0024] The accompanying drawings are marked as follows: 1. detachable pesticide spraying device; 2. operation transmission shaft; 3. seedling storage area; 10. medicine box assembly; 11. liquid delivery pump; 12. box body; 13. liquid delivery pipeline; 14. battery; 20. injection assembly; 21. control valve; 22. nozzle; 221. first nozzle; 222. second nozzle; 223. third nozzle; 224. plastically deformable hose; 225. straight section; 226. tightening section; 2261. housing; 2262. fan plate; 2263. elastic layer; 2264. second connecting membrane; 227. injection port; 23. bracket; 231. connecting rod; 232. supporting rod; 233. fixing member; 24. rotating dial; 25. pointer; 30. detection component; 31. connecting part; 32. encoding part; 40. control component; 41. main controller; 42. frequency converter; 50. image acquisition device. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of this specification. For ordinary technicians in this field, this specification can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0026] It should be understood that the "system", "device", "unit" and / or "module" used herein are a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0027] As shown in this specification and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0028] Agricultural machinery plays an important role in improving agricultural production efficiency. Among them, agricultural machinery such as rice transplanters and seed drills can assist farmers in tilling, transplanting, fertilizing, spraying, etc., increase seeding speed and reduce farmers' labor intensity. However, rice transplanters or seed drills often spray inaccurately, leading to many problems such as seedling insect pests or drug damage, waste of drug solution, and soil pollution.

[0029] In view of this, some embodiments of the present specification provide a detachable pesticide spraying device, which can detect the rotational speed of the operating transmission shaft and control the pumping amount of the pesticide solution according to the detected rotational speed, thereby improving the accuracy and uniformity of pesticide application, thereby solving various problems such as seedling insect or pesticide damage, waste of pesticide solution, soil pollution, etc.

[0030] Figure 1 It is a schematic structural diagram of a detachable pesticide spraying device according to some embodiments of the present specification.

[0031] In some embodiments of the present specification, a detachable pesticide spraying device 1 is provided. The detachable pesticide spraying device 1 is used for agricultural machinery and is detachably connected to the agricultural machinery, so as to be conveniently matched with different agricultural machinery. In some embodiments, the detachable pesticide spraying device 1 includes at least a medicine box component 10, a spray component 20, a detection component 30, and a control component 40.

[0032] In some embodiments, the medicine box assembly 10 includes a liquid delivery pump 11, a box body 12, a liquid delivery pipeline 13, and a battery 14. In some embodiments, the box body 12 is used to store liquid medicine, the liquid outlet of the box body 12 is connected to the liquid inlet of the liquid delivery pump 11, the liquid outlet of the liquid delivery pump 11 is connected to the liquid delivery pipeline 13, and the battery 14 is used to provide power to the liquid delivery pump 11. When the liquid delivery pump 11 is working, the liquid medicine in the box body 12 enters the liquid delivery pipeline 13 under the action of the liquid delivery pump 11.

[0033] In some embodiments, the spray assembly 20 is connected to the liquid delivery pipe 13 for spraying liquid medicine. When the liquid delivery pump 11 is working, the liquid medicine in the box 12 passes through the liquid delivery pipe 13 and is sprayed outward by the spray assembly 20 to apply medicine to crops (such as seedlings) to reduce insect pests.

[0034] In some embodiments, the detection component 30 is configured to be detachably connected to the working transmission shaft 2 of the agricultural machinery, and to detect the rotation speed of the working transmission shaft 2 when connected to the working transmission shaft 2. In some embodiments, the working transmission shaft 2 of the agricultural machinery refers to the transmission shaft in the mechanism used by the agricultural machinery to perform operations. Taking a rice transplanter as an example, the working transmission shaft 2 of the rice transplanter refers to the transmission shaft in the rice transplanting mechanism, and the rotation speed of the transmission shaft can characterize the transplanting speed of the rice transplanting mechanism, thereby determining the transplanting amount of the rice transplanter.

[0035] In some embodiments, the control component 40 includes a main controller 41 and a frequency converter 42, and the main controller 41 is configured to control the frequency converter 42 to adjust the pumping amount of the liquid pump 11 according to the detected speed. In some embodiments, the frequency converter 42 is electrically connected to the main controller 41 and the liquid pump 11. In some embodiments, the greater the speed of the working transmission shaft 2 of the agricultural machinery, the faster the speed of the operation is performed, and the main controller 41 controls the frequency of the frequency converter 42 to increase, thereby increasing the pumping amount of the liquid pump 11. In some embodiments, the smaller the speed of the working transmission shaft 2 of the agricultural machinery, the slower the speed of the operation is performed, and the main controller 41 controls the frequency of the frequency converter 42 to decrease, thereby reducing the pumping amount of the liquid pump 11.

[0036] According to the detachable pesticide spraying device 1 in some of the above embodiments, the detection component 30 detects the rotation speed of the operation transmission shaft 2 of the agricultural machinery, and can more accurately obtain the actual operation volume of the agricultural machinery, such as the transplanting volume, the sowing volume, etc. The control component 40 controls the frequency converter 42 to adjust the pumping volume of the liquid delivery pump 11 according to the detected rotation speed, that is, the pumping volume of the liquid delivery pump 11 is adjusted according to the actual operation volume of the agricultural machinery, so that the crops can be sprayed with liquid medicine appropriately, avoiding insect pests caused by too little liquid medicine, and avoiding pesticide damage caused by too much liquid medicine.

[0037] Compared with the scheme of spraying according to the speed of the agricultural machinery, when the detachable pesticide spraying device 1 sprays according to the moving speed of the agricultural machinery, the agricultural machinery will also spray when it is traveling alone and the operating mechanism is not enabled. For example, when the agricultural machinery is turning, the operating mechanism is not working. At this time, the agricultural machinery has a traveling speed and will also spray, resulting in waste of liquid medicine. However, the detachable pesticide spraying device 1 in some embodiments of the present specification detects the rotation speed of the operating transmission shaft 2 and sprays according to the actual operating volume of the operating transmission shaft 2, which can improve the accuracy and uniformity of the application of the pesticide, thereby solving various problems such as seedling insect pests or pesticide damage, waste of liquid medicine, soil pollution, etc.

[0038] Figure 2 It is a schematic diagram of the structure of the injection assembly 20 shown in some embodiments of the present specification.

[0039] In some embodiments, the spray assembly 20 includes one or more. Among them, multiple spray assemblies 20 can increase the spray range and improve the spraying efficiency. In some embodiments, the spray aperture of at least one spray assembly 20 in the spray assembly 20 is variable. In some embodiments, the spray aperture of the spray assembly 20 is determined according to the pumping amount of the liquid feeding pump 11, and the spraying amount is adjusted by changing the spray aperture.

[0040] In some embodiments, at least one of the spray assemblies 20 includes a control valve 21 and a plurality of spray heads 22, and the apertures of the plurality of spray heads 22 are different. In some embodiments, the spray assembly 20 includes but is not limited to two, three, four, or five spray heads 22. In some embodiments, at least two of the plurality of spray heads 22 have the same aperture, and the apertures of the other spray heads 22 are different. In some embodiments, the apertures of each of the plurality of spray heads 22 are the same.

[0041] In some embodiments, the control valve 21 is configured to control the connection or closure of multiple nozzles 22 and the liquid delivery pipeline 13 based on the rotation speed. In some embodiments, the control valve 21 selects the corresponding nozzle 22 to be connected or closed with the liquid delivery pipeline 13 based on the pumping volume of the liquid delivery pump 11 to adjust the injection aperture to control the amount of medicine applied. Among them, the connection between the nozzle 22 and the liquid delivery pipeline 13 means that the liquid can flow from the liquid delivery pipeline 13 to the nozzle 22, and the closure of the nozzle 22 and the liquid delivery pipeline 13 means that the liquid cannot flow from the liquid delivery pipeline 13 to the nozzle 22. For example, the pumping volume of the liquid delivery pump 11 includes a first threshold interval, a second threshold interval, and a third threshold interval that increase in sequence, and the injection assembly 20 includes a first nozzle 221, a second nozzle 222, and a third nozzle 223 with increasing apertures in sequence. When the pumping amount of the liquid delivery pump 11 is within the first threshold interval, the control valve 21 controls the first nozzle 221 to be connected to the liquid delivery pipeline 13, and controls the second nozzle 222 and the third nozzle 223 to be closed to the liquid delivery pipeline 13 respectively. When the pumping amount of the liquid delivery pump 11 is within the second threshold interval, the control valve 21 controls the second nozzle 222 to be connected to the liquid delivery pipeline 13, and controls the first nozzle 221 and the third nozzle 223 to be closed to the liquid delivery pipeline 13 respectively. When the pumping amount of the liquid delivery pump 11 is within the third threshold interval, the control valve 21 controls the third nozzle 223 to be connected to the liquid delivery pipeline 13, and controls the first nozzle 221 and the second nozzle 222 to be closed to the liquid delivery pipeline 13 respectively.

[0042] In some embodiments, the control valve 21 controls at least two of the multiple nozzles 22 to be connected to the liquid delivery pipeline 13, and the remaining nozzles 22 are closed to the liquid delivery pipeline 13. For example, when the pumping amount of the liquid delivery pump 11 is greater than the third threshold interval, the control valve 21 controls the second nozzle 222 and the third nozzle 223 to be connected to the liquid delivery pipeline 13, and controls the first nozzle 221 to be closed to the liquid delivery pipeline 13.

[0043] According to the above embodiment, the spray assembly 20 includes multiple nozzles 22 with different apertures. The control valve 21 selects the nozzle 22 with the corresponding aperture according to the pumping volume of the liquid delivery pump 11 to avoid spraying too much or too little liquid, thereby more accurately controlling the spraying volume of the liquid.

[0044] Figure 3It is a schematic diagram of the structure of an injection assembly 20 shown in some embodiments of the present specification.

[0045] In some embodiments, after the spray assembly 20 is connected to the agricultural machinery, the spraying directions of the spray heads 22 with different apertures are different, which specifically includes: the spraying angle of the spray head 22 is positively correlated with the aperture of the spray head 22. Among them, the spraying angle of the spray head 22 refers to the angle between the spraying direction of the spray head 22 and the vertical direction. In some embodiments, the spray assembly 20 includes a first spray head 221, a second spray head 222, and a third spray head 223 with increasing apertures, and the spraying angles of the three spray heads 22 are different. For example, the spraying angle of the first spray head 221 is α, the spraying angle of the second spray head 222 is β, and the spraying angle of the third spray head 223 is γ. The spray angle of the nozzle 22 is positively correlated with the aperture of the nozzle 22, including: the aperture of the first nozzle 221 is smaller than the aperture of the second nozzle 222, the aperture of the second nozzle 222 is smaller than the aperture of the third nozzle 223, then the spray angle α of the first nozzle 221 is smaller than the spray angle β of the second nozzle 222, and the spray angle β of the second nozzle 222 is smaller than the spray angle γ of the third nozzle 223. Since the larger the pumping volume of the liquid delivery pump 11, the larger the aperture of the nozzle 22 used, the higher the hydraulic pressure in the nozzle 22, the larger the aperture of the nozzle 22, the larger the spray angle is set, which is conducive to increasing the coverage of the liquid, and the smaller the aperture of the nozzle 22, the smaller the spray angle is set, which is conducive to directional spraying of local seedlings.

[0046] In some embodiments, the spraying angles of the plurality of spray heads 22 of the spray assembly 20 are the same.

[0047] In some embodiments, the spray assembly 20 further includes a plastically deformable hose 224, one end of which is connected to the control valve 21, and the other end of which is connected to the spray head 22. The plastically deformable hose 224 can maintain its deformed shape after being deformed by an external force, and can adjust the spray direction of the spray head 22 according to the expected spray range, thereby improving the spray accuracy.

[0048] Figure 4 It is a schematic diagram of the structure of the nozzle 22 shown in some embodiments of this specification.

[0049] like Figure 4 As shown, in some embodiments, at least one of the injection assemblies 20 includes a nozzle 22, and the nozzle 22 includes a straight section 225 and a tightening section 226. The tightening section 226 is disposed at the end of the straight section 225, and the end of the tightening section 226 forms an injection port 227. The tightening section 226 is radially reduced in a direction toward the injection port 227. In some embodiments, the straight section 225 and the tightening section 226 are integrally formed.

[0050] In some embodiments, the tightening section 226 includes a shell 2261 , a plurality of fan plates 2262 , an elastic layer 2263 , and a first connecting film and a second connecting film 2264 .

[0051] In some embodiments, a plurality of fan plates 2262 are distributed along the circumference of the inner wall of the tightening section 226 and are respectively connected to the inner wall of the straight section 225 in a deflectable manner. In some embodiments, the fan plates 2262 are connected to the straight section 225 via a hinge structure such as a ball joint or a rotating shaft. For example, one end of the plurality of fan plates 2262 away from the injection port 227 is connected to the end of the straight section 225 in a deflectable manner, so that the fan plates 2262 can deflect radially relative to the inner wall of the tightening section 226.

[0052] In some embodiments, adjacent slats 2262 are connected by a first connection membrane (not shown). In some embodiments, the first connection membrane is made of a flexible material, such as fabric, plastic, etc. In some embodiments, the first connection membrane has a waterproof effect, for example, the first connection membrane is made of waterproof cloth to prevent the elastic layer 2263 from getting wet. When the slats 2262 deflect toward the shell 2261 close to the tightening section 226, the first connection membrane is unfolded, and when the slats 2262 deflect toward the shell 2261 away from the tightening section 226, the first connection membrane is retracted.

[0053] In some embodiments, the ends of the plurality of fan plates 2262 are connected to one end of the second connection membrane 2264, and the other end of the second connection membrane 2264 is connected to the injection port 227. In some embodiments, the second connection membrane 2264 is made of an elastic material, such as rubber, silicone, etc. In some embodiments, the second connection membrane 2264 has a waterproof effect to prevent the elastic layer 2263 from getting wet. In some embodiments, the second connection membrane 2264 is in a stretched state in the initial state, which is conducive to maintaining the regular shape of the nozzle. Among them, the initial state refers to the state where the nozzle 22 has no hydraulic pressure.

[0054] In some embodiments, the second connecting film 2264 may also be made of a flexible material, such as fabric, plastic, etc.

[0055] In some embodiments, the elastic layer 2263 is disposed between the fan plate 2262 and the housing 2261. In some embodiments, the elastic layer 2263 keeps the second connection film 2264 in a stretched state in the initial state. The ratio of the elastic coefficient of the elastic layer 2263 to the elastic coefficient of the second connection film 2264 is not less than 5:1, so as to prevent the second connection film 2264 from pulling the fan plate 2262 to cause a large deformation of the elastic layer 2263.

[0056] In some embodiments, the elastic layer 2263 includes sponge rubber, and the 25% compression hardness of the elastic layer 2263 is not less than 2Kpa, wherein the 25% compression hardness of the elastic layer 2263 refers to the pressure required for the elastic layer 2263 to produce a 25% compression deformation. In some embodiments, the 50% compression hardness of the elastic layer 2263 is not less than 1MPa, wherein the 50% compression hardness of the elastic layer 2263 refers to the pressure required for the elastic layer 2263 to produce a 50% compression deformation.

[0057] According to the nozzle 22 in some of the above embodiments, in the initial state of the nozzle 22 without hydraulic pressure, the elastic layer 2263 is in the initial shape. When liquid is sprayed in the nozzle 22, the fan plate 2262 deflects toward the housing 2261 close to the tightening section 226, thereby compressing the elastic layer 2263 to deform, the first connecting film is unfolded, the second connecting film 2264 is contracted, and the aperture of the injection port 227 is enlarged. In some embodiments, the fan plate 2262 deflects as the hydraulic pressure in the nozzle 22 changes. For example, when the hydraulic pressure in the nozzle 22 increases, the hydraulic pressure drives the fan plate 2262 to deflect toward the housing 2261 close to the tightening section 226, thereby compressing the elastic layer 2263 to deform, so that the aperture of the injection port 227 increases. For another example, when the hydraulic pressure in the nozzle 22 decreases, the elastic layer 2263 drives the fan plate 2262 to deflect toward the housing 2261 away from the tightening section 226 under the action of the elastic restoring force, so that the aperture of the injection port 227 decreases. Thereby, the purpose of changing the injection aperture of the nozzle 22 is achieved, and the aperture of the nozzle 22 can be changed according to different pumping volumes of the liquid delivery pump 11, thereby improving the injection accuracy.

[0058] Figure 5 It is a schematic block diagram of the structure of the detection component 30 shown in some embodiments of this specification.

[0059] In some embodiments, the detection component 30 includes a connection part 31 and an encoding part 32, the connection part 31 is configured to detachably mount the encoding part 32 on the working transmission shaft 2 of the agricultural machinery, and the encoding part 32 is configured to detect the rotation speed of the working transmission shaft 2 of the agricultural machinery. In some embodiments, the connection part 31 includes but is not limited to a mounting frame, a mounting box, a sleeve, etc. In some embodiments, the encoding part 32 detects the angle of rotation of the working transmission shaft 2 of the agricultural machinery in a unit time, thereby obtaining the rotation speed of the working transmission shaft 2 of the agricultural machinery, and converts the rotation speed of the working transmission shaft 2 of the agricultural machinery into an electrical signal and sends it to the main controller 41. In some embodiments, the encoding part 32 may include a photoelectric encoder.

[0060] In some embodiments, the detachable pesticide spraying device 1 further comprises a first connector (not shown in the figure), which is used to detachably connect the box 12 to the agricultural machinery. In some embodiments, the first connector comprises a base, the box 12 is fixed on the base, and the base is detachably connected to the agricultural machinery. In some embodiments, the first connector comprises a frame, the box 12 is detachably placed in the frame, and the frame is fixed to the agricultural machinery.

[0061] In some embodiments, the detachable pesticide spraying device 1 further includes a second connecting member (not shown in the figure), which is used to hang the spray assembly 20 on the agricultural machinery. In some embodiments, the spray assembly 20 is hung in the working area of ​​the agricultural machinery, such as the rice seedling storage area 3 of the rice transplanter. In some embodiments, the second connecting member includes a connecting rod 231, a connecting rope, etc., and the spray assembly 20 is detachably connected to the agricultural machinery through components such as the connecting rod 231 or the connecting rope.

[0062] Figure 6 It is a schematic diagram of a detachable pesticide spraying device 1 and a seedling storage area 3 according to some embodiments of the present specification.

[0063] like Figure 6 As shown, in some embodiments, the agricultural machinery is a rice transplanter, and the injection assembly 20 includes a bracket 23, which is used to be erected at both ends of the rice seedling storage area 3 of the rice transplanter. The rice seedling storage area 3 refers to a component for storing rice seedlings, and a rice transplanting mechanism is provided under the rice seedling storage area 3, which is used to insert the rice seedlings from the rice seedling storage area 3 into the ground.

[0064] In some embodiments, the bracket 23 includes a connecting rod 231 detachably connected to the rice seedling storage area 3 and a support rod 232 spanning the rice seedling storage area 3, and the nozzle 22 of the spray assembly 20 is fixed on the support rod 232. In some embodiments, the nozzle 22 is fixed to the support rod 232 through the liquid delivery pipe 13, and the liquid delivery pipe 13 and the support rod 232 are fixedly connected by a fixing member 233. Among them, the fixing member 233 includes but is not limited to a threaded member, a snap-fit ​​member, an adhesive, etc.

[0065] In some embodiments, the support rod 232 is connected to the connecting rod 231 and is rotatable relative to the connecting rod 231 around the axis of the support rod 232 at the connection position. In some embodiments, both ends of the support rod 232 are hinged to the connecting rod 231, and the connecting rod 231 is used to be fixed on the agricultural machinery and remain stationary. The support rod 232 is rotatable relative to the connecting rod 231, and the rotation axis of the support rod 232 is colinear with the central axis of the support rod 232. The rotation of the support rod 232 drives the nozzle 22 to rotate as a whole, thereby changing the spraying direction of the nozzle 22. The spraying direction can be determined according to the height of the seedlings, so that the liquid medicine is sprayed from the top of the seedlings, so that the liquid medicine covers the entire seedlings, and the spraying accuracy is improved.

[0066] In some embodiments, a dial and a pointer 25 are provided at the connection position of the support rod 232 and the connecting rod 231, and the pointer 25 is fixed relative to the support rod 232, and the rotation of the support rod 232 can drive the pointer 25 to rotate relative to the dial. The angle of rotation of the support rod 232 can be directly determined by the angle that the pointer 25 rotates on the dial. In some embodiments, the dial is fixed on the connecting rod 231. In some embodiments, a dial is provided at one end of the support rod 232. In some embodiments, a dial is provided at both ends of the support rod 232. In some embodiments, the dial is fixed to the support rod 232, and the pointer 25 is fixed on the connecting rod 231, and the rotation of the support rod 232 can drive the dial to rotate relative to the pointer 25. The rotation angle of the support rod 232 can be intuitively read through the dial and the pointer 25, which is convenient for the user to adjust the direction of the nozzle 22.

[0067] In some embodiments, the detachable pesticide spraying device 1 further includes an image acquisition device 50 and a processor (not shown in the figure). The image acquisition device 50 is connected to the processor signal, and the image acquisition device 50 can be hung in the rice seedling storage area 3 to obtain a plant image (such as a rice seedling image). The processor identifies the plant height (such as the rice seedling height) based on the plant image, and calculates the spray angle of the spray assembly 20 according to the plant height, and sends the spray angle to the output terminal used by the user of the detachable pesticide spraying device 1, such as a display, a speaker, etc.

[0068] In some embodiments, the processor identifies the plant image based on a trained image recognition model to determine the plant height, wherein the training sample of the image recognition model may be a plant image and the training label may be a plant height. For example, the processor determines the tallest plant from the plant image, identifies the plant height of the tallest plant, and identifies the height of the nozzle 22. Next, the processor determines the spray angle of the nozzle 22 based on the difference between the plant height and the height of the nozzle 22. Finally, the processor sends the spray angle to the output terminal.

[0069] In some embodiments, after obtaining the spraying angle, the user rotates the support rod 232 to change the direction of the spray head 22 so that the spray head 22 sprays according to the spraying angle given by the processor.

[0070] In some embodiments, the image acquisition device 50 is further configured to acquire a liquid medicine spraying image, and the liquid medicine spraying image includes but is not limited to an image formed by the liquid medicine in a vertical direction and an image formed in a horizontal direction.

[0071] In some embodiments, the processor determines whether the liquid medicine spray range meets the expected spray range based on the liquid medicine spray image, and sends the judgment result to the output terminal. The liquid medicine spray range includes but is not limited to the spray height of the highest point of the liquid medicine in the vertical direction, the widest distance of the liquid medicine in the horizontal direction, etc. The expected spray range includes but is not limited to the expected spray height of the highest point of the liquid medicine in the vertical direction, and the expected widest distance of the liquid medicine in the horizontal direction.

[0072] In some embodiments, if the spray range of the liquid medicine does not meet the expected spray range, the output terminal issues a warning message. In some embodiments, if the spray height of the liquid medicine is less than the expected spray height, or the widest distance of the liquid medicine spray is less than the expected widest distance, it is determined that the spray range of the liquid medicine does not meet the expected spray range. At this time, the output terminal issues a warning message, and the warning message includes but is not limited to various methods such as voice broadcast, alarm bell broadcast, and display text display.

[0073] In some embodiments, if the spray range of the liquid medicine does not meet the expected spray range, the processor is further configured to calculate the wind force based on the current spray angle and the spray range. In some embodiments, the processor calculates the expected spray angle based on the expected spray range, then calculates the difference between the current spray angle and the expected spray angle, and calculates the difference between the current spray range and the expected spray range, and calculates the wind force based on these differences.

[0074] In some embodiments, the processor further calculates a target spray angle according to the wind force and the expected spray range, and the warning information includes the target spray angle. The user rotates the support rod 232 according to the target spray angle to make the spray head 22 face the target spray angle.

[0075] In some embodiments, if the liquid medicine spray range does not meet the expected spray range, the image acquisition device 50 acquires the liquid medicine spray image in real time, and the user adjusts the direction of the nozzle 22 according to the target spray angle. After the direction of the nozzle 22 changes, the liquid medicine spray range changes accordingly. According to the liquid medicine spray image acquired in real time, the processor determines whether the liquid medicine spray range meets the expected spray range based on the liquid medicine spray image: if the liquid medicine spray range meets the expected spray range, the output terminal issues a warning release message, prompting the user that the nozzle 22 angle has been adjusted; if the liquid medicine spray range still does not meet the expected spray range, the output terminal continues to issue a warning message, prompting the user to continue to adjust the nozzle 22 direction until the nozzle 22 direction is adjusted to a suitable position so that the warning message can be released.

[0076] The beneficial effects that may be brought about by the embodiments of the present application include but are not limited to: (1) the detection component of the detachable pesticide spraying device detects the rotation speed of the operation transmission shaft of the agricultural machinery, and can more accurately obtain the actual operation volume of the agricultural machinery, such as the transplanting volume, the sowing volume, etc.; (2) the control component of the detachable pesticide spraying device controls the frequency converter to adjust the pumping volume of the liquid delivery pump according to the detected rotation speed, that is, the pumping volume of the liquid delivery pump is adjusted according to the actual operation volume of the agricultural machinery, so that the crops can be sprayed with liquid medicine appropriately, avoiding insect pests caused by too little liquid medicine, and avoiding pesticide damage caused by too much liquid medicine. Compared with the scheme of spraying pesticides according to the travel speed or travel area of ​​agricultural machinery, the detachable pesticide spraying device in some embodiments of the present specification can improve the accuracy and uniformity of pesticide application, thereby solving various problems such as seedling insect pests or pesticide damage, waste of pesticide solution, soil pollution, etc.; (3) The spray assembly includes multiple nozzles with different apertures, and the control valve selects the nozzle with the corresponding aperture according to the pumping volume of the liquid delivery pump to avoid spraying too much or too little pesticide solution, thereby more accurately controlling the spraying volume of the pesticide solution; (4) The spray direction of the nozzle is adjusted according to the expected spraying range through the plastic deformable hose to improve the spraying accuracy; (5) The spray aperture of the nozzle is changed by the fan plate and the elastic layer, so that the nozzle aperture can be changed according to the different pumping volumes of the liquid delivery pump, thereby improving the spraying accuracy; (6) The nozzle is driven to rotate as a whole by the rotation of the support rod, thereby changing the spray direction of the nozzle, and the spray direction can be determined according to the height of the seedling, so that the pesticide solution is sprayed from the top of the seedling, so that the pesticide solution covers the entire seedling, thereby improving the spraying accuracy. It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects that may be produced may be any one or a combination of the above, or any other beneficial effects that may be obtained.

[0077] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to this specification. Such modifications, improvements and corrections are suggested in this specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of this specification.

[0078] At the same time, this specification uses specific words to describe the embodiments of this specification. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of this specification. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of this specification can be appropriately combined.

[0079] Similarly, it should be noted that in order to simplify the description disclosed in this specification and thus help understand one or more embodiments, in the above description of the embodiments of this specification, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this specification are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0080] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of this specification are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0081] Finally, it should be understood that the embodiments described in this specification are only used to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, as an example and not a limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly introduced and described in this specification.

Claims

1. A detachable pesticide spraying device, characterized in that: include: Medicine box assembly, including a liquid delivery pump, a box body, a liquid delivery pipeline and a battery; A spray assembly, connected to the liquid delivery pipeline, for spraying the liquid medicine; The injection aperture of at least one of the injection assemblies is variable; comprising: At least one of the injection assemblies comprises a nozzle, the nozzle comprising a straight section and a tightening section, the tightening section is arranged at the end of the straight section, the end of the tightening section forms an injection port, and the tightening section has a radial dimension that decreases in a direction toward the injection port; The tightening section comprises an outer shell, a plurality of fan plates, an elastic layer, a first connecting membrane and a second connecting membrane, wherein the plurality of fan plates are distributed along the circumference of the inner wall of the tightening section and are respectively connected to the inner wall of the straight section in a deflectable manner, adjacent fan plates are connected via the first connecting membrane, the ends of the plurality of fan plates are connected to one end of the second connecting membrane, the other end of the second connecting membrane is connected to the injection port, and the elastic layer is arranged between the fan plates and the outer shell; The elastic layer enables the second connecting film to maintain a stretched state in an initial state; The fan plate deflects relative to the housing based on a change in the pumping volume in the spray head, thereby changing the spray aperture; The elastic layer comprises sponge rubber, and the 25% compression hardness of the elastic layer is not less than 2Kpa, and the 50% compression hardness of the elastic layer is not less than 1MPa; A detection assembly is configured to be detachably connected to an operation transmission shaft of an agricultural machine and to detect a rotation speed of the operation transmission shaft when connected to the operation transmission shaft; the agricultural machine includes a rice transplanter, and the operation transmission shaft includes a transmission shaft in a rice transplanting mechanism of the rice transplanter; The control component includes a main controller and a frequency converter, wherein the main controller is configured to control the frequency converter to adjust the pumping volume of the liquid delivery pump according to the detected rotation speed.

2. The detachable pesticide spraying device according to claim 1, characterized in that: At least one of the injection assemblies includes a control valve and a plurality of nozzles, wherein the apertures of the plurality of nozzles are different, and the control valve is configured to control the plurality of nozzles to be connected or closed to the liquid delivery pipeline based on the rotation speed.

3. The detachable pesticide spraying device according to claim 2, characterized in that: After the spray assembly is connected to the agricultural machinery, the spray heads with different apertures have different spray directions, which specifically include: The spray angle of the nozzle is positively correlated with the aperture of the nozzle.

4. The detachable pesticide spraying device according to claim 2, characterized in that: The spray assembly also includes a plastically deformable hose, one end of which is connected to the control valve, and the other end of which is connected to the spray head.

5. The detachable pesticide spraying device according to claim 1, characterized in that: The detection component includes a connecting portion and an encoding portion, wherein the connecting portion is configured to detachably mount the encoding portion on an operating transmission shaft of the agricultural machinery, and the encoding portion is configured to detect a rotation speed of the operating transmission shaft of the agricultural machinery.

6. The detachable pesticide spraying device according to claim 1, characterized in that: The detachable pesticide spraying device further comprises a first connecting member and a second connecting member, wherein the first connecting member is used to detachably connect the box to the agricultural machinery, and the second connecting member is used to hang the spraying assembly on the agricultural machinery.

7. The detachable pesticide spraying device according to claim 1, characterized in that: The spray assembly includes a bracket, which is used to be erected at both ends of the seedling storage area of ​​the rice transplanter, the bracket includes a connecting rod detachably connected to the seedling storage area and a support rod spanning the seedling storage area, the spray head of the spray assembly is fixed on the support rod, and the support rod is connected to the connecting rod and can rotate relative to the connecting rod around the axis of the support rod at the connection position; The connection position is provided with a dial and a pointer, the pointer is fixed relative to the support rod, and the rotation of the support rod can drive the pointer to rotate relative to the dial.

8. The detachable pesticide spraying device according to claim 7, characterized in that: The detachable pesticide spraying device also includes an image acquisition device and a processor. The image acquisition device is connected to the processor signal. The image acquisition device can be hung in the seedling storage area to obtain plant images. The processor identifies the plant height based on the plant image, calculates the spray angle of the spray assembly according to the plant height, and sends the spray angle to the output terminal used by the user of the detachable pesticide spraying device.

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