Water and fertilizer spraying device and spraying process for plant foliage fertilization

Abstract

The application discloses a water and fertilizer spraying device and a spraying process for plant foliar fertilization, and relates to the technical field of plant fertilization. The application comprises a spraying vehicle, a spraying assembly and a water and fertilizer filtering assembly. The rotating lead screw drives the movement of the lead screw sleeve, the movement of the lead screw sleeve drives the movement of the movable nozzle, when the lead screw sleeve drives the movable nozzle to move towards the spraying installation frame, the spraying width is reduced; when the lead screw sleeve drives the movable nozzle to move away from the spraying installation frame, the spraying width is increased. After the spraying width adjustment of the movable nozzle is completed, the water and fertilizer is sprayed from the movable nozzle after passing through the water and fertilizer filtering assembly, and the spraying vehicle moves to perform the spraying work on the plant leaves. While changing the spraying width, the spacing between the movable nozzles is uniformly changed, the spraying range overlap is avoided, the spraying is uniform, the manual adjustment steps are reduced, and the work efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of plant fertilization, and in particular relates to a water and fertilizer spraying device and a spraying process for plant foliar fertilization. BACKGROUND

[0002] Water is the source of life and the necessary condition for the development of agricultural and forestry production, and fertilizer is an important guarantee for biological yield increase. Currently, many crops are still using traditional irrigation methods such as flooding irrigation, ditch irrigation and furrow irrigation. In order to improve the fertilization effect and save costs, the use of water and fertilizer spraying equipment has gradually increased.

[0003] In the process of water and fertilizer spraying, the spraying port is usually fixed in position, resulting in a fixed spraying width. Manual disassembly and adjustment of the spraying port are required, which is low in work efficiency. The spacing between the manually adjusted spraying ports is not accurate, resulting in overlapping of the spraying ranges between individual spraying ports and uneven spraying, which reduces the spraying effect. Because the water in the water and fertilizer is often taken from rivers, impurities such as water grass and sand are contained in the water and fertilizer and need to be filtered. However, the impurities often block the filter screen and need to be cleaned, which requires the machine to be stopped, reducing work efficiency and device applicability. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the problems in the related art, the present application provides a water and fertilizer spraying device and a spraying process for plant foliar fertilization, which has the function of changing the spraying width while uniformly changing the spacing between the moving nozzles, avoiding overlapping of the spraying ranges, reducing manual adjustment steps, improving work efficiency, and improving work efficiency by removing the filter box containing impurities after use and replacing it with a new filter box. The technical problems of manual disassembly and adjustment of the spraying port, low work efficiency, and inaccurate spacing between the manually adjusted spraying ports, resulting in overlapping of the spraying ranges between individual spraying ports and uneven spraying, which reduces the spraying effect, because the water in the water and fertilizer is often taken from rivers, resulting in impurities such as water grass and sand in the water and fertilizer, which need to be filtered. However, the impurities often block the filter screen and need to be cleaned, which requires the machine to be stopped, reducing work efficiency and device applicability.

[0006] (II) Technical solutions

[0007] To solve the above technical problems, the present application provides the following technical solutions: the present application is a water and fertilizer spraying device, which comprises a spraying vehicle, a spraying assembly and a water and fertilizer filtering assembly. The spraying vehicle tail is fixedly installed with a support frame. The spraying assembly is arranged on the support frame. The spraying assembly comprises a spraying installation frame and two spraying units.

[0008] The spraying unit comprises a spraying head support rod, a plurality of moving spraying heads, a plurality of rotating lead screws, a plurality of lead screw sleeves and a spraying head connecting plate, the spraying head support rod is fixedly installed on the spraying installation frame, the moving spraying heads are slidably installed on the spraying head support rod, the spraying head connecting plate is fixedly installed on the side of the moving spraying heads, the lead screw sleeve is fixedly installed on one side of the spraying head connecting plate, the rotating lead screw is rotatably installed on the other side of the spraying head connecting plate, and the rotating lead screw is threadedly sleeved with the lead screw sleeve.

[0009] When the spraying installation frame moves vertically, the spraying head support rod moves vertically; when the rotating lead screw rotates, the lead screw sleeve moves in the horizontal direction, the movement of the lead screw sleeve drives the movement of the spraying head connecting plate, the movement of the spraying head connecting plate drives the movement of the moving spraying heads, and the interval between the moving spraying heads changes equally.

[0010] Preferably, the spraying assembly further comprises a lifting lead screw, a lifting motor and two spraying installation plates, the spraying installation frame is slidably installed on the support frame, the lifting lead screw is rotatably installed on the support frame, the lifting block is threadedly sleeved on the lifting lead screw, the lifting block is fixedly connected with the spraying installation frame, the lifting motor is fixedly installed on the bottom of the support frame, the driving shaft of the lifting motor is fixedly connected with the lifting lead screw, the spraying installation plates are fixedly installed on the side of the spraying installation frame away from the support frame, and the spraying installation plates are respectively located on the two sides of the lifting lead screw.

[0011] Preferably, the spraying unit further comprises a moving motor and a moving connecting rod, the moving motor is fixedly installed on the side of the spraying installation plate close to the lifting lead screw, the rotating lead screw is rotatably installed on the other side of the spraying installation plate, the driving shaft of the moving motor is rotatably connected with the rotating lead screw through the spraying installation plate, the rotating lead screw is threadedly sleeved with the lead screw sleeve closest to the spraying installation plate, the end of the rotating lead screw close to the lead screw sleeve is provided with a rotating connecting groove, one end of the moving connecting rod is slidably installed in the rotating connecting groove, and the other end of the moving connecting rod is fixedly connected with the rotating lead screw through the spraying head connecting plate.

[0012] Preferably, the spraying unit further comprises an auxiliary support rod, an auxiliary installation block, a rotating support block and a support motor, the auxiliary support rod is arranged above the spraying head support rod, the auxiliary support rod is fixedly connected with the spraying installation frame, the auxiliary installation block is fixedly installed on the auxiliary support rod, the rotating support block is rotatably installed at the bottom end of the auxiliary installation block, and the support motor is fixedly installed on the auxiliary installation block.

[0013] Preferably, the water and fertilizer filtering assembly comprises a liquid storage tank, a water and fertilizer partition plate, a water and fertilizer filtering box, a filtering box, a closing plate, a closing connecting rod and a closing cylinder, the liquid storage tank is fixedly installed on the spraying vehicle, the water and fertilizer partition plate is fixedly installed in the liquid storage tank, a liquid outlet is formed in the bottom surface of the water and fertilizer partition plate, the water and fertilizer filtering box is fixedly installed at the liquid outlet in the bottom surface of the water and fertilizer partition plate, two filtering boxes are slidably installed in the water and fertilizer filtering box, two closing plates are slidably installed on the top surface of the water and fertilizer filtering box, the two ends of the closing connecting rod are fixedly connected with the closing plates respectively, the closing cylinder is fixedly installed outside the water and fertilizer filtering box, and the output end of the closing cylinder is fixedly connected with the closing connecting rod.

[0014] Preferably, the water and fertilizer filtering assembly further comprises a filtering replacement unit, the filtering replacement unit is arranged on both sides of the water and fertilizer filtering box, the filtering replacement unit comprises a rotating limiting rod, a replacement mounting block, a replacement motor, a replacement electric push rod, a replacement spring and a replacement push plate, the rotating limiting rod is rotatably installed on the side of the filtering box, a limiting special-shaped sliding groove is formed in the side plate of the rotating limiting block, one end of the rotating limiting rod is slidably installed in the limiting special-shaped sliding groove, and the other end is rotatably connected with the replacement mounting block, the replacement motor is fixedly connected with the replacement mounting block, the driving shaft of the replacement motor is fixedly connected with the rotating limiting rod through the replacement mounting block, the replacement electric push rod is fixedly installed on one side of the inner wall of the liquid storage tank, the output end of the replacement electric push rod is fixedly connected with the replacement mounting block, the replacement spring is fixedly installed on one end of the inner wall of the liquid storage tank, and the replacement push plate is fixedly connected with the replacement spring.

[0015] Preferably, a plurality of guide rods are fixedly installed on the inner wall of the liquid storage tank, the filtering box can move along the guide groove formed by the guide rods, and the guide rods can limit the filtering box, replacement outlets are formed on both sides of the liquid storage tank, a discharging lead screw is rotatably installed in the liquid storage tank, a discharging push rod is threadedly sleeved on the discharging lead screw, and a discharging motor is fixedly installed on the outer wall of the liquid storage tank.

[0016] Preferably, a liquid blocking block is slidably installed in the water and fertilizer filtering box, and a liquid blocking cylinder is fixedly installed outside the water and fertilizer filtering box, and the output end of the liquid blocking cylinder is fixedly connected with the liquid blocking block through the water and fertilizer filtering box.

[0017] Preferably, the spraying assembly further comprises a fixed support rod, a fixed spray head and a spraying liquid conveying pipe, the fixed support rod is fixedly installed on the spraying installation frame, two fixed spray heads are fixedly installed on the fixed support rod, and the spraying liquid conveying pipe is fixedly installed between the fixed spray heads and the movable spray head.

[0018] A spraying process for plant foliage fertilization, characterized in that the water and fertilizer spraying device is used, comprising the following steps:

[0019] The spraying vehicle is started;

[0020] The spraying installation frame moves vertically, driving the nozzle support rod to move, so as to adjust the position of the mobile nozzle;

[0021] The rotating lead screw rotates, driving the lead screw sleeve to move, and the movement of the lead screw sleeve drives the mobile nozzle to move, when the lead screw sleeve drives the mobile nozzle to move towards the spraying installation frame, the spraying width decreases; when the lead screw sleeve drives the mobile nozzle to move away from the spraying installation frame, the spraying width increases;

[0022] After the spraying width of the mobile nozzle is adjusted, the water and fertilizer is sprayed from the mobile nozzle after passing through the water and fertilizer filtering assembly, and the spraying vehicle moves to spray the plant foliage.

[0023] (Three) beneficial effects

[0024] Compared with the prior art, the water and fertilizer spraying device and the spraying process for plant foliage fertilization have the following beneficial effects:

[0025] 1、The rotating lead screw rotates, driving the lead screw sleeve to move, and the movement of the lead screw sleeve drives the mobile nozzle to move, when the lead screw sleeve drives the mobile nozzle to move towards the spraying installation frame, the spraying width decreases; when the lead screw sleeve drives the mobile nozzle to move away from the spraying installation frame, the spraying width increases, after the spraying width of the mobile nozzle is adjusted, the water and fertilizer is sprayed from the mobile nozzle after passing through the water and fertilizer filtering assembly, and the spraying vehicle moves to spray the plant foliage.

[0026] 2, closed cylinder drive closed connecting rod movement, closed connecting rod movement driven two closed plate movement, one closed plate to carry out the filter outlet is closed, a filter replacement unit of the replacement of the electric push rod drive replacement installation block movement, replacement installation block movement driven filter box from water and fertilizer filter box removed, replacement motor drive rotating limit rod rotation, rotating limit rod driven rotating limit block rotation, so that the limit profiled groove has vertical state rotation to the horizontal state, replacement spring push replacement push plate push unused filter box extrusion removed filter box, the removed filter box movement, the unused filter box on rotating limit block profiled groove and rotating limit rod one end of the sliding installation, replacement motor drive rotating limit rod rotation, so that the limit profiled groove from the horizontal state to the vertical state replacement electric push rod drive replacement installation block movement, the unused filter box is moved to the water and fertilizer filter box; without stopping the case, the filter box after use of the existence of sundries and replace the new filter box, improve work efficiency.

[0027] 3, through the movement of the closed class and liquid block, prevent water and fertilizer in the process of filter box replacement overflow, reduce waste, improve the applicability of the device.

[0028] Of course, the implementation of any product of the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme of the embodiments of the application, the following will be needed to use the drawings described simply introduced, obviously, the following description in the drawings only some embodiments of the application, for those skilled in the art, without creative labor, according to these drawings can also obtain other drawings.

[0030] Figure 1 is one of the overall structure of the application schematic diagram;

[0031] Figure 2 is one of the local structure of the application schematic diagram;

[0032] Figure 3 is the A structure of the application schematic diagram; Figure 2

[0033] Figure 4 is the second local structure of the application schematic diagram;

[0034] Figure 5 is the B structure of the application schematic diagram; Figure 4

[0035] Figure 6 is the third local structure of the application schematic diagram;

[0036] Figure 7 ​​A structure schematic view at C of the Figure 6 A structure schematic view at C of the

[0037] Figure 8 A structure schematic view at D of the Figure 6 A structure schematic view at D of the

[0038] Figure 9 A structure schematic view at D of the A structure schematic view at D of the

[0039] A structure schematic view at D of the Figure 10 A structure schematic view at E of the Figure 9 A structure schematic view at E of the A structure schematic view at E of the

[0040] A structure schematic view at E of the Figure 11 A structure schematic view at F of the A structure schematic view at F of the

[0041] A structure schematic view at F of the Figure 12 A structure schematic view at F of the Figure 11 A structure schematic view at F of the A structure schematic view at F of the

[0042] In the drawings, the components represented by each reference numeral are listed as follows:

[0043] 1, spraying vehicle; 101, support frame; 2, spraying assembly; 201, spraying mounting frame; 202, lifting screw rod; 203, lifting motor; 204, spraying mounting plate; 205, fixed support rod; 206, fixed spray head; 207, spraying liquid delivery pipe; 3, water and fertilizer filtering assembly; 301, liquid storage tank; 302, water and fertilizer partition plate; 303, water and fertilizer filtering box; 304, filtering box; 305, closing plate; 306, closing connecting rod; 307, closing cylinder; 308, rotation limiting block; 309, guide rod; 310, discharging screw rod; 311, discharging push rod; 312, discharging motor; 313, liquid blocking block; 314, liquid blocking cylinder; 4, spraying unit; 401, spray head support rod; 402, movable spray head; 403, rotation screw rod; 404, screw rod sleeve; 405, spray head connecting plate; 406, moving motor; 407, moving connecting rod; 408, auxiliary support rod; 409, auxiliary mounting block; 410, rotation support block; 411, support motor; 5, filtering replacement unit; 501, rotation limiting rod; 502, replacement mounting block; 503, replacement motor; 504, replacement electric push rod; 505, replacement spring; 506, replacement push plate. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments of the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0045] In the description of the present application, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner" and the like indicate the orientation or positional relationship and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0046] Embodiment one, please refer to Figure 1 Figure 12 As shown in the drawings, the present application is a kind of water and fertilizer spraying device, including spraying car 1, spraying assembly 2 and water and fertilizer filtering assembly 3, spraying car 1 tail fixedly installed with support frame 101, spraying assembly 2 is arranged on support frame 101, spraying assembly 2 includes spraying installation frame 201 and two spraying units 4;

[0047] Spraying unit 4 includes spray head support rod 401, a plurality of mobile spray heads 402, a plurality of rotating lead screws 403, a plurality of lead screw sleeves 404 and spray head connecting plates 405, spray head support rod 401 is fixedly installed on spraying installation frame 201, mobile spray head 402 is slidably installed on spray head support rod 401, spray head connecting plate 405 is fixedly installed on the side of mobile spray head 402, spray head connecting plate 405 is fixedly installed with lead screw sleeve 404 on one side, spray head connecting plate 405 is rotatably installed with rotating lead screw 403 on the other side, rotating lead screw 403 is threadedly sleeved with lead screw sleeve 404;

[0048] When spraying installation frame 201 moves vertically, it can drive spray head support rod 401 to move vertically; when rotating lead screw 403 rotates, it can drive lead screw sleeve 404 to move in horizontal direction, the movement of lead screw sleeve 404 can drive spray head connecting plate 405 to move, and mobile spray head 402 moves under the drive of spray head connecting plate 405, and the interval between mobile spray heads 402 changes equally;

[0049] In use, spraying car 1 is started, spraying installation frame 201 moves vertically, driving spray head support rod 401 to move, thereby adjusting the position of mobile spray head 402, rotating lead screw 403 rotates, driving lead screw sleeve 404 to move, and the movement of lead screw sleeve 404 drives mobile spray head 402 to move, when lead screw sleeve 404 drives mobile spray head 402 to move towards the direction close to spraying installation frame 201, the spraying width decreases; when lead screw sleeve 404 drives mobile spray head 402 to move away from spraying installation frame 201, the spraying width increases, after the adjustment of the spraying width of mobile spray head 402 is completed, water and fertilizer is sprayed out from mobile spray head 402 after passing through water and fertilizer filtering assembly 3, and spraying car 1 moves to spray the plant leaves; while changing the spraying width, the interval between mobile spray heads 402 changes uniformly, avoiding overlapping of the spraying range and uneven spraying, reducing the steps of manual adjustment and improving the work efficiency.

[0050] ​Embodiment two, unlike the above embodiment, please refer to Figure 2 , Figure 3 , the spraying assembly 2 further comprises a lifting screw 202, a lifting motor 203, and two spraying mounting plates 204, the spraying mounting frame 201 is slidingly mounted on the support frame 101, the lifting screw 202 is rotatably mounted on the support frame 101, a lifting block is threadedly sleeved on the lifting screw 202, the lifting block is fixedly connected with the spraying mounting frame 201, the lifting motor 203 is fixedly mounted on the bottom of the support frame 101, a driving shaft of the lifting motor 203 is fixedly connected with the lifting screw 202, the spraying mounting plate 204 is fixedly mounted on the side of the spraying mounting frame 201 away from the support frame 101, and the spraying mounting plate 204 is located on the two sides of the lifting screw 202 respectively;

[0051] In use, the lifting motor 203 drives the lifting screw 202 to rotate, and the lifting screw 202 drives the spraying mounting frame 201 to move vertically through the lifting block.

[0052] Embodiment three, unlike the above embodiment, please refer to Figure 4 , Figure 5 , the spraying unit 4 further comprises a moving motor 406 and a moving connecting rod 407, the moving motor 406 is fixedly mounted on the side of the spraying mounting plate 204 close to the lifting screw 202, a rotating screw 403 is rotatably mounted on the other side of the spraying mounting plate 204, a driving shaft of the moving motor 406 penetrates through the spraying mounting plate 204 and is rotatably connected with the rotating screw 403, the rotating screw 403 is threadedly sleeved with the screw sleeve 404 closest to the spraying mounting plate 204, a rotating connecting groove is formed in one end of the rotating screw 403 close to the screw sleeve 404, one end of the moving connecting rod 407 is slidingly mounted in the rotating connecting groove, and the other end penetrates through the spray head connecting plate 405 and is fixedly connected with the rotating screw 403;

[0053] In use, the moving motor 406 drives the rotating screw 403 in contact with the spraying mounting plate 204 to rotate, the rotating screw 403 drives the adjacent rotating screw 403 to rotate through the moving connecting rod 407, and the moving connecting rod slides in the rotating connecting groove when the spacing between the rotating screws 403 changes.

[0054] Embodiment four, unlike the above embodiment, please refer to Figure 6 , Figure 7The spraying unit 4 further comprises an auxiliary supporting rod 408, an auxiliary mounting block 409, a rotating supporting block 410 and a supporting motor 411. The auxiliary supporting rod 408 is arranged above the spraying head supporting rod 401 and is fixedly connected with the spraying mounting frame 201. The auxiliary mounting block 409 is fixedly mounted on the auxiliary supporting rod 408. The rotating supporting block 410 is rotatably mounted at the bottom end of the auxiliary mounting block 409. The supporting motor 411 is fixedly mounted on the auxiliary mounting block 409, and the driving shaft of the supporting motor 411 is fixedly connected with the rotating supporting block 410.

[0055] When the spraying head 402 is moved for adjustment, the supporting motor 411 drives the rotating supporting block 410 to rotate, and the rotating supporting block 410 is out of contact with the spraying supporting rod. When the adjustment of the spraying head 402 is completed, the supporting motor 411 drives the rotating supporting block 410 to rotate and contact with the spraying supporting rod. At this time, the auxiliary supporting rod 408 assists in supporting the spraying supporting rod through the rotating supporting block 410.

[0056] Embodiment five, unlike the above embodiments, please refer to Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 The water and fertilizer filtering assembly 3 comprises a liquid storage tank 301, a water and fertilizer partition plate 302, a water and fertilizer filtering tank 303, two filtering boxes 304, two closing plates 305, a closing connecting rod 306 and a closing cylinder 307. The liquid storage tank 301 is fixedly mounted on the spraying vehicle 1. The water and fertilizer partition plate 302 is fixedly mounted in the liquid storage tank 301. The bottom surface of the water and fertilizer partition plate 302 is provided with a liquid outlet. The water and fertilizer filtering tank 303 is fixedly mounted at the liquid outlet of the bottom surface of the water and fertilizer partition plate 302. The two filtering boxes 304 are slidably mounted in the water and fertilizer filtering tank 303. The two closing plates 305 are slidably mounted on the top surface of the water and fertilizer filtering tank 303. The two ends of the closing connecting rod 306 are fixedly connected with the closing plates 305, respectively. The closing cylinder 307 is fixedly mounted outside the water and fertilizer filtering tank 303, and the output end of the closing cylinder 307 is fixedly connected with the closing connecting rod 306.

[0057] In use, the water and fertilizer partition plate 302 divides the liquid storage tank 301 into two layers. The water and fertilizer is stored in the upper space of the liquid storage tank 301. The closing cylinder 307 drives the closing connecting rod 306 to move, which drives the two closing plates 305 to move. One of the closing plates 305 closes half of the liquid outlet, and the other half of the liquid outlet is in an open state. The water and fertilizer enters the water and fertilizer filtering tank 303 through the open liquid outlet and is discharged from the outlet of the water and fertilizer filtering tank 303 through the water and fertilizer filtering boxes 304.

[0058] Embodiment six, unlike the above embodiments, please refer to Figure 10 、 Figure 11The water and fertilizer filtering assembly 3 further comprises a filtering replacement unit 5 arranged on both sides of the water and fertilizer filtering box 303. The filtering replacement unit 5 comprises a rotating limiting rod 501, a replacement mounting block 502, a replacement motor 503, a replacement electric push rod 504, a replacement spring 505 and a replacement push plate 506. The rotating limiting block 308 is rotatably arranged on the side of the filtering box 304. The side plate of the rotating limiting block 308 is provided with a limiting special-shaped sliding groove. One end of the rotating limiting rod 501 is slidably arranged in the limiting special-shaped sliding groove, and the other end is rotatably connected with the replacement mounting block 502. The replacement motor 503 is fixedly connected with the replacement mounting block 502. The driving shaft of the replacement motor 503 is fixedly connected with the rotating limiting rod 501 through the replacement mounting block 502. The replacement electric push rod 504 is fixedly arranged on one side of the inner wall of the liquid storage tank 301. The output end of the replacement electric push rod 504 is fixedly connected with the replacement mounting block 502. The replacement spring 505 is fixedly arranged on one end of the inner wall of the liquid storage tank 301. The replacement push plate 506 is fixedly connected with the replacement spring 505.

[0059] In use, the closed cylinder 307 drives the closed connecting rod 306 to move, the closed connecting rod 306 drives the two closed plates 305 to move, one closed plate 305 closes the liquid outlet after filtering, the replacement electric push rod 504 of one filtering replacement unit 5 drives the replacement mounting block 502 to move, the replacement mounting block 502 drives the filtering box 304 to move out of the water and fertilizer filtering box 303, the replacement motor 503 drives the rotating limiting rod 501 to rotate, the rotating limiting rod 501 drives the rotating limiting block 308 to rotate, the limiting special-shaped groove is rotated from a vertical state to a horizontal state, the replacement spring 505 pushes the replacement push plate 506 to push the unused filtering box 304 to extrude the removed filtering box 304, the removed filtering box 304 moves, the special-shaped groove of the rotating limiting block 308 on the unused filtering box 304 is slidably arranged on one end of the rotating limiting rod 501, the replacement motor 503 drives the rotating limiting rod 501 to rotate, the limiting special-shaped groove is rotated from the horizontal state to the vertical state, the replacement electric push rod 504 drives the replacement mounting block 502 to move, and the unused filtering box 304 moves into the water and fertilizer filtering box 303.

[0060] In the seventh embodiment, which is different from the above-mentioned embodiments, please refer to Figure 8 、 Figure 9 、 Figure 11 A plurality of guide rods 309 are fixedly arranged on the inner wall of the liquid storage tank 301. The filtering box 304 can move along the guide groove formed by the guide rods 309, and the guide rods 309 can limit the filtering box 304. Replacement outlets are arranged on both sides of the liquid storage tank 301. A discharging lead screw 310 is rotatably arranged in the liquid storage tank 301. A discharging push rod 311 is threadedly arranged on the discharging lead screw 310. A discharging motor 312 is fixedly arranged on the outer wall of the liquid storage tank 301.

[0061] In use, when the filter box 304 is replaced, the guide rod 309 moves and limits the filter box 304, and when the filter box 304 is moved out, the guide rod 309 guides the filter box 304; the discharge motor 312 drives the discharge screw rod 310 to rotate, the gear screw rod drives the discharge rod 311 to move, and the discharge rod 311 pushes the replaced filter box 304 out of the discharge port.

[0062] Embodiment eight, unlike the above embodiments, please refer to Figure 12 , the water and fertilizer filter box 303 is slidably installed with a liquid blocking block 313, and the water and fertilizer filter box 303 is fixedly installed with a liquid blocking cylinder 314 outside, and the output end of the liquid blocking cylinder 314 penetrates through the water and fertilizer filter box 303 and is fixedly connected with the liquid blocking block 313;

[0063] In use, the liquid blocking cylinder 314 drives the liquid blocking block 313 to move, so that the liquid blocking block 313 moves to separate the two filter boxes 304 in the water and fertilizer filter box 303, preventing the filtered water and fertilizer from flowing out of the water and fertilizer filter box 303 during replacement.

[0064] Embodiment nine, unlike the above embodiments, please refer to Figure 3 , the spraying assembly 2 further comprises a fixed support rod 205, a fixed spray head 206 and a spraying liquid pipe 207, the fixed support rod 205 is fixedly installed on the spraying installation frame 201, two fixed spray heads 206 are fixedly installed on the fixed support rod 205, and the spraying liquid pipe 207 is fixedly installed between the fixed spray head 206 and the mobile spray head 402;

[0065] In use, the filtered water and fertilizer in the liquid storage tank 301 is sprayed out of the fixed spray head 206 and the mobile spray head 402 through the spraying liquid pipe 207.

[0066] A spraying process for plant foliar fertilization, characterized in that the above-mentioned water and fertilizer spraying device is used, comprising the following steps:

[0067] The spraying vehicle 1 is started;

[0068] The spraying installation frame 201 moves vertically, driving the spray head support rod 401 to move, so as to adjust the position of the mobile spray head 402;

[0069] The lead screw 403 rotates, driving the screw sleeve 404 to move, and the screw sleeve 404 moving drives the mobile spray head 402 to move, when the screw sleeve 404 drives the mobile spray head 402 to move towards the spraying installation frame 201, the spraying width decreases; when the screw sleeve 404 drives the mobile spray head 402 to move away from the spraying installation frame 201, the spraying width increases;

[0070] After the spraying width adjustment of the mobile spray head 402 is completed, the water and fertilizer is sprayed from the mobile spray head 402 after passing through the water and fertilizer filtering assembly 3, and the spraying vehicle 1 moves to spray the plant leaves.

[0071] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the invention. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0072] The above disclosed preferred embodiments of the invention are only used to help explain the invention. The preferred embodiments do not describe all the details and limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present specification. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the invention, so that those skilled in the art can well understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A water and fertilizer spraying device, comprising a spraying vehicle, a spraying assembly and a water and fertilizer filtering assembly, characterized in that: The tail of the spraying vehicle is fixedly provided with a support frame, and the spraying assembly is arranged on the support frame. The spraying unit comprises a spraying mounting frame and two spraying units. When the spraying mounting frame moves vertically, the spraying support rod moves vertically. The spraying assembly further comprises a lifting screw and two spraying mounting plates. The spraying unit further comprises a moving motor and a moving connecting rod. The water and fertilizer filtering assembly comprises a liquid storage tank, a water and fertilizer partition plate, a water and fertilizer filtering box, a filtering box, a closing plate, a closing connecting rod and a closing cylinder. The tail of the spraying vehicle is fixedly provided with a support frame, and the spraying assembly is arranged on the support frame. The water and fertilizer filtering assembly further comprises a filtering replacement unit arranged on both sides of the water and fertilizer filtering box, the filtering replacement unit comprising a rotating limiting rod, a replacement mounting block, a replacement motor, a replacement electric push rod, a replacement spring and a replacement push plate, a rotating limiting block being rotatably mounted on the side of the filtering box, a limiting profiled sliding groove being formed in the side plate of the rotating limiting block, one end of the rotating limiting rod being slidably mounted in the limiting profiled sliding groove, the other end being rotatably connected with the replacement mounting block, the replacement motor being fixedly connected with the replacement mounting block, the driving shaft of the replacement motor being fixedly connected with the rotating limiting rod through the replacement mounting block, the replacement electric push rod being fixedly mounted on one side of the inner wall of the liquid storage tank, the output end of the replacement electric push rod being fixedly connected with the replacement mounting block, the replacement spring being fixedly mounted on one end of the inner wall of the liquid storage tank, the replacement push plate being fixedly connected with the replacement spring. The replacement mounting block moves to drive the filtering box to move out of the water and fertilizer filtering box, the replacement motor drives the rotating limiting rod to rotate, so that the limiting profiled groove is rotated from the vertical state to the horizontal state, the replacement spring pushes the replacement push plate to push the unused filtering box to extrude and move out the filtering box, so that the moved-out filtering box moves, the profiled groove of the rotating limiting block on the unused filtering box is slidably mounted with one end of the rotating limiting rod, the replacement motor drives the rotating limiting rod to rotate, so that the limiting profiled groove is rotated from the horizontal state to the vertical state, and the replacement electric push rod drives the replacement mounting block to move, so that the unused filtering box moves into the water and fertilizer filtering box.

2. The water and fertilizer spraying device according to claim 1, characterized in that, The spraying assembly further comprises a lifting motor, the spraying mounting frame is slidably mounted on the support frame, a lifting block is threadedly sleeved on the lifting lead screw, the lifting block is fixedly connected with the spraying mounting frame, the lifting motor is fixedly mounted on the bottom of the support frame, the driving shaft of the lifting motor is fixedly connected with the lifting lead screw, the spraying mounting plate is fixedly mounted on the side of the spraying mounting frame away from the support frame, and the spraying mounting plate is located on the two sides of the lifting lead screw.

3. The water and fertilizer spraying device according to claim 1, characterized in that, The spraying unit further comprises an auxiliary supporting rod, an auxiliary mounting block, a rotating supporting block and a supporting motor, the auxiliary supporting rod is arranged above the nozzle supporting rod, the auxiliary supporting rod is fixedly connected with the spraying mounting frame, the auxiliary mounting block is fixedly mounted on the auxiliary supporting rod, the rotating supporting block is rotatably mounted on the bottom end of the auxiliary mounting block, the supporting motor is fixedly mounted on the auxiliary mounting block, and the driving shaft of the supporting motor is fixedly connected with the rotating supporting block.

4. The water and fertilizer spraying device according to claim 1, characterized in that, A plurality of guide rods are fixedly mounted on the bottom surface of the inner wall of the liquid storage tank, the filtering box can move along the guide groove formed by the guide rods, and the guide rods can limit the filtering box, replacement outlets are formed in the two sides of the liquid storage tank, a discharging lead screw is rotatably mounted in the liquid storage tank, a discharging push rod is threadedly sleeved on the discharging lead screw, and a discharging motor is fixedly mounted on the outer wall of the liquid storage tank.

5. The water and fertilizer spraying device according to claim 1, characterized in that, The water and fertilizer filtering box is internally slidably provided with a liquid blocking block, and externally fixedly provided with a liquid blocking cylinder, and the output end of the liquid blocking cylinder is fixedly connected with the liquid blocking block through the water and fertilizer filtering box.

6. The water and fertilizer spraying device according to claim 5, characterized in that, The spraying assembly further comprises a fixed support rod, a fixed spray head and a spraying liquid delivery pipe, the fixed support rod is fixedly installed on the spraying installation frame, two fixed spray heads are fixedly installed on the fixed support rod, and the spraying liquid delivery pipe is fixedly installed between the fixed spray head and the movable spray head.

7. A spray application process for foliar fertilization of plants, characterized in that The water and fertilizer spraying device is used, and comprises the following steps: The spraying vehicle is started; The spraying installation frame is vertically moved to drive the spray head support rod to move, so as to adjust the position of the movable spray head; The rotating lead screw is rotated to drive the lead screw sleeve to move, the movement of the lead screw sleeve drives the movable spray head to move, when the lead screw sleeve drives the movable spray head to move towards the spraying installation frame, the spraying width is reduced, and when the lead screw sleeve drives the movable spray head to move away from the spraying installation frame, the spraying width is increased; After the spraying width of the movable spray head is adjusted, the water and fertilizer is sprayed from the movable spray head after passing through the water and fertilizer filtering assembly, and the spraying vehicle is moved to spray the plant leaves.

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