Foliar fertilizer spraying device for soybean planting

Abstract

The invention relates to the technical field of agricultural machinery, in particular to a leaf fertilizer spraying device for soybean planting, which comprises a swing bracket, a plurality of movable spraying rods, a pair of transmission pipelines, a driving device and a pressure maintaining module, the swing bracket is arranged in an inner cavity of a frame main body; the plurality of movable spray rods are arranged on the swinging bracket, and inner cavities of the movable spray rods are communicated with an inner cavity of the swinging bracket and are used for spraying a foliar fertilizer solution; the pair of transmission pipelines is arranged on the frame main body and is used for communicating the water tank of the frame main body with the inner cavity of the swinging bracket; the driving device is fixedly arranged on the frame main body, is connected with the swinging bracket and is used for driving the swinging bracket to swing back and forth; the pressure maintaining module is arranged on the water tank and used for maintaining the pressure environment of an inner cavity of the water tank stable. According to the device, the swinging bracket and the movable spraying rod are arranged in the inner cavity of the movable frame main body, so that the aim of movably dressing foliar fertilizer on the back surfaces of crop leaves is fulfilled, and the problem of high foliar fertilizer dressing cost in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, in particular to a foliar fertilizer spraying device for soybean planting. Background Art

[0002] During soybean cultivation, foliar topdressing during the early flowering period is crucial to promote flower bud differentiation and pollen tube elongation. Traditionally, this task relied primarily on handheld agricultural manual sprayers. During topdressing, workers held a movable spray boom, passing the atomizing spray tip over the upper side of the plant, applying a foliar fertilizer solution to the soybean leaves. However, this method has a significant drawback: the sprayed fertilizer primarily covers the front of the leaves. Because the front of soybean leaves has far fewer stomata than the back, crop absorption of the fertilizer is inefficient, resulting in wasted resources and limited yield gains. With the development of intelligent agricultural power machinery, replacing manual labor with intelligent agricultural power machinery has not only significantly freed up manpower and improved work efficiency, but also intelligently adjusted the spray angle and efficiency of the fertilizer, allowing precise application to the back of the leaves, significantly improving crop absorption.

[0003] For example, in the prior art, a Chinese invention patent with authorization announcement number CN118435769B proposes a foliar fertilizer spraying device and application method. The device arranges a spraying device on the cultivated land below the plant. When applying foliar fertilizer, the fertilizer solution in the water tank is pressed into the sleeve. When the temperature rises, the gas in the air bag expands, pushing the piston upward, and the piston moves upward, while driving the lifting plate to move upward. The upward movement of the lifting plate drives the screw rod to rotate, and then drives the rotating tube to rotate. At the same time, the upward movement of the piston also presses the solution into the screw rod. The solution enters the rotating tube from the screw rod and is finally sprayed out through the nozzle, so that the fertilizer solution can be sprayed from bottom to top, so that the fertilizer solution can better adhere to the back of the leaves, which can effectively improve the plant's absorption rate of the foliar fertilizer solution.

[0004] However, for growers, when using the above-mentioned foliar fertilizer spraying device for foliar topdressing, it is necessary to arrange pipelines and spraying devices over a large area of ​​the cultivated land surface, which increases the cost of foliar topdressing. In addition, since the spraying device is located on the lower side of the plant, when a spraying device ruptures and causes the fertilizer solution to leak, it is difficult to be discovered in time. Summary of the Invention

[0005] In view of the technical problems existing in the prior art, an embodiment of the present invention provides a foliar fertilizer spraying device for soybean planting, comprising: The swing bracket is arranged in the inner cavity of the frame body. When the frame body moves, crops planted in the cultivated land pass through both sides of the swing bracket. A viewing window is arranged on the top plate of the frame body. A plurality of movable spray bars are arranged on the swing bracket, and the inner cavities of the plurality of movable spray bars are all connected with the inner cavity of the swing bracket for spraying foliar fertilizer solution; A pair of transmission pipelines are provided on the vehicle frame body, and either transmission pipeline is connected to the water tank of the vehicle frame body and the inner cavity of the swing bracket; A driving device is fixedly mounted on the vehicle frame body and connected to the swing bracket to drive the swing bracket to swing back and forth; The pressure maintaining module is installed on the water tank to maintain the stable pressure environment in the water tank cavity.

[0006] Furthermore, the swing bracket comprises: A pair of bearing seats are fixedly arranged on the bottom of the top plate of the frame body, and the pair of bearing seats are located between the pair of side plates of the frame body; A main shaft is arranged between a pair of side plates, with both ends of the main shaft being rotatably connected to a pair of bearing seats, and the main shaft is connected to a driving device; A pair of diversion blind holes are respectively opened on the end faces of both ends of the main shaft, and the pair of diversion blind holes are rotatably connected to the output ends of a pair of transmission pipelines, one of the transmission pipelines connects one of the diversion blind holes with the top of the inner cavity of the water tank, and the other transmission pipeline connects the other diversion blind hole with the bottom of the inner cavity of the water tank; A pair of rockers are fixedly arranged on the circumferential side wall of the main shaft, the central axis of any rocker is perpendicular to the central axis of the main shaft, and the inner cavities of the pair of rockers are respectively connected to a pair of guide blind holes; A pair of connecting rods are movably arranged between the pair of rocking arms, wherein the middle sections of the pair of connecting rods are rotatably connected to the bottom ends of the pair of rocking arms, and the pair of rocking arms are fixedly connected to the two ends of the movable spraying arms, respectively. Any connecting rod connects one of the rocking arms and the inner cavity of several movable spraying arms; A pair of current limiting components are respectively arranged at the rotational connections between the pair of connecting rods and the pair of rocking arms.

[0007] Furthermore, the current limiting component includes: A guide tube is fixedly arranged at the middle section of one of the connecting rods, the output end of the guide tube is connected to the inner cavity of the connecting rod, the bottom end port of one of the rocker arms is inserted into the inner cavity of the guide tube, and the bottom end port of the rocker arm is rotatably connected to the guide tube; A first flow limiting plate is fixedly mounted on the inner wall of the flow guide tube, and the first flow limiting plate matches the radial cross-sectional shape of the inner cavity of the flow guide tube; A plurality of first flow limiting holes are provided on the first flow limiting plate, and the plurality of first flow limiting holes are distributed in an array around the central circumference of the first flow limiting plate; A second flow limiting plate is fixedly mounted on the inner wall of the bottom port of the rocker, the second flow limiting plate matches the radial cross-sectional shape of the inner cavity of the bottom port of the rocker, and the second flow limiting plate abuts against the first flow limiting plate; A plurality of second flow limiting holes are provided on the second flow limiting plate, and the plurality of second flow limiting holes are distributed in an array around the central circumference of the second flow limiting plate; The torsion spring is sleeved on the guide tube, and two ends of the torsion spring are respectively fixedly connected to the guide tube and the rocker.

[0008] Furthermore, the swing bracket also includes: a pair of vibration devices, which are respectively fixed at the bottom ends of a pair of connecting rods.

[0009] Furthermore, the swing bracket also includes: a pair of magnetic constraint components, the pair of magnetic constraint components are respectively arranged on a pair of rockers, and the pair of magnetic constraint components are respectively connected to the top ends of a pair of connecting rods for magnetically constraining the pair of connecting rods.

[0010] Furthermore, the magnetic restraint component includes: a permanent magnet, fixedly disposed on the top end of one of the connecting rods; A chute is fixedly provided on the side wall of one of the rockers, and is provided along the length direction of the rocker. When the connecting rod is parallel to the rocker, the position of the permanent magnet corresponds to the bottom end of the chute; A magnetic metal part is slidably arranged in the inner cavity of the slide groove; A pair of traction ropes are fixedly arranged on the top plate of the frame body, the bottom ends of the pair of traction ropes are connected to the magnetic metal parts, and the pair of traction ropes are arranged on both sides of the main shaft for pulling the magnetic metal parts to slide along the guide of the slide groove.

[0011] Furthermore, the movable spray boom includes: The spray boom body is arranged between a pair of connecting rods, and both ends of the spray boom body are fixedly connected to the pair of connecting rods respectively; a pair of flow channels disposed inside the boom body, wherein one of the flow channels is communicated with the inner cavity of one of the connecting rods, and the other flow channel is communicated with the inner cavity of the other connecting rod; A plurality of nozzles are fixedly arranged on the circumferential side wall of the spray bar body, and the input end of the nozzle is connected to one of the flow channels; A plurality of air holes are provided on the circumferential side wall of the spray bar, and a plurality of the air holes are communicated with another flow channel.

[0012] Furthermore, the device also comprises: A pair of fixed spray bars are fixedly arranged on the inner wall of the frame body, the pair of fixed spray bars are respectively connected to the bottom of the inner cavity of the water tank, the swing bracket is located between the pair of fixed spray bars, and any one of the fixed spray bars is arranged in parallel with the side plate of the frame body for spraying foliar fertilizer solution; A pair of rolling curtain devices are respectively arranged at the head end and the tail end of the frame body, and are used for covering the ports at the head and tail ends of the frame body.

[0013] Furthermore, the rolling shutter device comprises: A pair of supports are fixedly arranged on the top of the frame body; The reel is arranged between a pair of supports, and both ends of the reel are rotatably connected to the pair of supports respectively; A pair of driving handles are fixedly arranged at both ends of the reel, and are used to drive the shaft to rotate; A roller blind is rolled up on a reel, with the tail end of the roller blind vertically directed to the ground, and is used to shield the head end port or the tail end port of the frame body; A pair of brake assemblies are respectively arranged on a pair of supports, and the pair of brake assemblies are connected to the reel for braking the reel.

[0014] Furthermore, the brake assembly comprises: a guide groove, provided on one of the supports; A movable block is slidably disposed in the inner cavity of the guide groove along the axial direction of the guide groove, and the bottom of the movable block abuts against the circumferential side wall surface of the reel to brake the reel; A plurality of springs are arranged in the inner cavity of the guide groove. The two ends of any spring are respectively connected to the movable block and the inner cavity top wall of the guide groove for elastically supporting the movable block.

[0015] A foliar fertilizer spraying device for soybean planting according to an embodiment of the present invention has the following beneficial effects: 1. The present device arranges a swing bracket and multiple movable spray bars in the inner cavity of a semi-enclosed frame body, and uses a drive device to control the reciprocating swing of the swing bracket, thereby driving the multiple movable spray bars to reciprocate and approach the crops located on both sides of the swing bracket during the movement of the frame body, thereby achieving a bottom-up spraying effect of the foliar fertilizer solution. By simplifying its own structure, it solves the problem of increased foliar fertilizer cost caused by the need to arrange spray devices over a large area in the prior art, and reduces the escape velocity of the atomized foliar fertilizer solution, thereby improving the utilization rate of the foliar fertilizer solution. Secondly, the present device provides a window on the top plate of the frame body, allowing users to observe the operation of the equipment in the inner cavity of the frame body through the window at any time, so that users can promptly repair the equipment when it malfunctions. Thirdly, the present device provides a vibration device at the bottom end of the connecting rod to drive the connecting rod and the movable spray bar to vibrate, making it easier for the branches and leaves of the crop plants to fit into the gaps between the multiple movable spray bars, thereby preventing damage to the branches and leaves of the crop plants during the foliar fertilizer application process.

[0016] 2. The swing bracket of the device is equipped with a flow limiting component at the rotating connection between the rocker and the connecting rod, and a vibration device is provided at the bottom end of each pair of connecting rods. When the swing bracket drives several movable spray rods to swing back and forth, and the rocker gradually tends to a vertical state after being separated from the crops, the connecting rod gradually approaches to be parallel to the rocker under the combined action of the elastic force of the torsion spring and gravity, so that the first flow limiting hole and the second flow limiting hole are staggered with each other, preventing the foliar fertilizer solution from entering the connecting rod through the rocker, and then preventing the foliar fertilizer solution from being sprayed out through the movable spray rod, avoiding the problem of foliar fertilizer solution waste due to excessive atomization spraying distance, and improving the utilization rate of the foliar fertilizer solution.

[0017] 3. This device utilizes a torsion spring to elastically support the connecting rod, so that when several movable spray arms approach the crops under the drive of the rocker, the movable spray arm arranged at the bottom of the connecting rod preferentially presses the main stem of the crop near the root, thereby transmitting the vibration generated by the vibration device to the main stem of the crop, driving the leaves of the crop to shake, reducing the obstruction of the stacked leaves of the crop to the atomized foliar fertilizer solution, enhancing the adhesion rate of the foliar fertilizer solution on the back of the crop leaves and the absorption rate of the foliar fertilizer solution by the crops; and it can also effectively prevent the movable spray arm arranged at the top of the connecting rod from excessively pressing the relatively lush functional leaves at the top of the plant, causing them to be damaged.

[0018] 4. The device is provided with a magnetic constraint component, so that when the rocker approaches the vertical state, the magnetic force between the magnetic metal part and the permanent magnet is used to constrain the top of the connecting rod, thereby preventing the connecting rod from continuing to swing under the drive of the vibration device, thereby enhancing the structural stability of the swing bracket, and preventing the foliar fertilizer solution from continuing to be sprayed through the movable spray boom when the rocker is in the vertical state, thereby wasting the foliar fertilizer solution, and saving the spraying cost of the foliar fertilizer solution; and the magnetic constraint component releases the magnetic constraint on the top of the connecting rod by using a traction rope to displace the magnetic metal part and separate it from the permanent magnet, thereby greatly enhancing the operational reliability of the swing bracket, and effectively avoiding the problem of increased friction resistance on the contact surface between the magnetic metal part and the permanent magnet due to soil or other impurities between the magnetic metal part and the permanent magnet, which in turn leads to excessive squeezing of crops in the process of the swing bracket driving the movable spray boom to swing and spray the foliar fertilizer solution, thereby causing damage to the crops.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a perspective view according to an embodiment of the present invention; Figure 2 is a schematic diagram of the internal structure according to an embodiment of the present invention; Figure 3A schematic diagram of the assembly of a swing bracket according to an embodiment of the present invention; Figure 4 A schematic diagram of the internal structure of a swing bracket according to an embodiment of the present invention; Figure 5 for Figure 4 A partial enlarged schematic diagram of the A region; Figure 6 A schematic diagram of the structural decomposition of a current limiting component according to an embodiment of the present invention; Figure 7 for Figure 4 A partial enlarged schematic diagram of area B in the middle; Figure 8 A schematic diagram of the assembly of a magnetic attraction constraint assembly according to an embodiment of the present invention; Figure 9 for Figure 4 A partial enlarged schematic diagram of the middle C area; Figure 10 A schematic diagram of the structural decomposition of a magnetic attraction restraint assembly according to an embodiment of the present invention; Figure 11 for Figure 4 A partial enlarged schematic diagram of the middle D area; Figure 12 A schematic diagram of the structural decomposition of a rolling curtain device according to an embodiment of the present invention; Figure 13 Schematic diagram of the assembly of a brake assembly according to an embodiment of the present invention.

[0021] Description of the accompanying drawings: 1-frame body, 11-top plate, 12-connecting bracket, 13-wheel, 14-support leg, 15-water tank, 16-side plate, 2-swing bracket, 21-bearing seat, 22-main shaft, 221-diversion blind hole, 23-rocker, 24-connecting rod, 25-current limiting assembly, 251-diversion pipe, 252-first current limiting plate, 2521-first current limiting hole, 253-second current limiting plate, 2531-second current limiting hole, 254-torsion spring, 26-vibration device, 261-mounting bracket, 262-protective cover, 263-motor, 264-cam, 27-Magnetic constraint assembly, 271-Permanent magnet, 272-Slide, 273-Magnetic metal part, 2731-Bearing part, 2732-Connecting part, 274-Traction rope, 3-Movable spray boom, 31-Spray boom body, 32-Flow channel, 33-Nozzle, 34-Air hole, 4-Transmission pipeline, 5-Drive device, 6-Pressure maintaining module, 61-Air pump, 62-Pressure relief valve, 7-Fixed spray boom, 8-Rolling curtain device, 81-Support, 82-Reel, 83-Drive handle, 84-Rolling curtain, 851-Guide groove, 852-Movable block, 853-Spring. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to further illustrate the present invention.

[0023] The foregoing and other technical aspects, features, and benefits of the present invention will be more clearly understood in the following detailed description of the embodiments, which is accompanied by reference to the accompanying drawings. Directional terms such as up, down, left, right, front, and back, used in the following embodiments, are merely references to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes only and are not intended to limit the present invention. Furthermore, identical reference numerals throughout the embodiments denote identical elements.

[0024] First, combine Figures 1 to 13 A foliar fertilizer spraying device for soybean planting according to an embodiment of the present invention is used for foliar topdressing of crops and has a wide range of application scenarios.

[0025] Specifically, if Figures 1 and 2 A foliar fertilizer spraying device for soybean planting according to an embodiment of the present invention comprises: a swing bracket 2, a plurality of movable spray bars 3, a pair of transmission pipelines 4, a driving device 5 and a pressure maintaining module 6; the swing bracket 2 is arranged in the inner cavity of the frame body 1. When the frame body 1 moves, the crops planted in the cultivated land pass through both sides of the swing bracket 2. A window (not shown in the figure) is provided on the top plate of the frame body. The window consists of a window and a transparent acrylic plate. The transparent acrylic plate is fixedly arranged in the window so that the user can observe the operation of the equipment in the inner cavity of the frame body through the window; a plurality of movable spray bars 3 are provided. The rod 3 is arranged on the swing bracket 2, and the inner cavities of several movable spray rods 3 are connected to the inner cavity of the swing bracket 2 for spraying foliar fertilizer solution; a pair of transmission pipelines 4 are arranged on the frame body 1, and any transmission pipeline 4 connects the water tank 15 of the frame body 1 and the inner cavity of the swing bracket 2; the driving device 5 is fixedly arranged on the frame body 1, and the driving device 5 is connected to the swing bracket 2 for driving the swing bracket 2 to swing back and forth. In this embodiment, the driving device 5 includes but is not limited to the reduction motor 263; the pressure maintaining module 6 is arranged on the water tank 15 to maintain the stable pressure environment in the inner cavity of the water tank 15.

[0026] Preferably, Figures 1 and 2In this embodiment, the frame body 1 includes: a top plate 11, a connecting bracket 12, a pair of wheels 13, a pair of support legs 14 and a water tank 15; the top plate 11 is fixedly arranged on the top of a pair of side plates 16, and any side plate 16 is perpendicular to the top plate 11; the connecting bracket 12 is fixedly arranged on the pair of side plates 16, and the user can pull the frame body 1 forward through the connecting bracket 12, and the user can also connect the connecting bracket 12 to a tractor, so that the user can drive multiple devices forward by driving the tractor, so that the user can use This device is used to carry out foliar topdressing on soybean fields with wide platforms and large ridges; a pair of wheels 13 are rotatably set on a pair of side plates 16 respectively; a pair of support legs 14 are fixedly set on the pair of side plates 16 respectively, and the pair of support legs 14 are located at the head end of the frame body 1 for supporting the frame body 1; a water tank 15 is fixedly set on the top of the top plate 11, and the water tank 15 pre-stores foliar fertilizer solution for foliar topdressing of crops, and the distance between the inner surface of the foliar fertilizer solution stored in the water tank 15 and the top wall of the inner cavity of the water tank 15 is not less than one-quarter of the height of the water tank 15.

[0027] Further, if Figures 2-4 The swing bracket 2 includes: a pair of bearing seats 21, a main shaft 22, a pair of diversion blind holes 221, a pair of rockers 23 and a pair of connecting rods 24. The pair of bearing seats 21 are fixedly arranged at the bottom of the top plate 11 of the frame body 1, and the pair of bearing seats 21 are located between the pair of side plates 16 of the frame body 1; the main shaft 22 is arranged between the pair of side plates 16, and the two ends of the main shaft 22 are respectively rotatably connected to the pair of bearing seats 21, and the main shaft 22 is connected to the driving device 5; a pair of diversion blind holes 221 are respectively opened on the end faces at both ends of the main shaft 22, and the pair of diversion blind holes 221 are respectively rotatably connected to the output ends of a pair of transmission pipelines 4, one of the transmission pipelines 4 connects one of the diversion blind holes 221 and the top of the inner cavity of the water tank 15, and the other transmission pipeline 4 connects the other diversion blind hole 221 and the bottom of the inner cavity of the water tank 15. In this embodiment, a first valve is provided on the transmission pipeline 4 connected to the bottom of the inner cavity of the water tank 15, which is used to control the on-off of the transmission pipeline 4; a pair of rocking arms 23 are fixedly arranged on the circumferential side wall of the main shaft 22, and the central axis of any rocking arm 23 is perpendicular to the central axis of the main shaft 22, and the inner cavities of the pair of rocking arms 23 are respectively connected to a pair of diversion blind holes 221; a pair of connecting rods 24 are movably arranged between the pair of rocking arms 23, and the middle sections of the pair of connecting rods 24 are respectively rotatably connected to the bottom ends of the pair of rocking arms 23, and the pair of rocking arms 23 are respectively fixedly connected to the two ends of the movable spray bars 3, and any connecting rod 24 is connected to the inner cavity of one of the rocking arms 23 and several movable spray bars 3; a pair of flow limiting components 25, and a pair of flow limiting components 25 are respectively arranged at the rotation connection between the pair of connecting rods 24 and the pair of rocking arms 23.

[0028] Further, if Figures 4-6The flow limiting assembly 25 includes: a flow guide tube 251, a first flow limiting plate 252, a plurality of first flow limiting holes 2521, a second flow limiting plate 253, a plurality of second flow limiting holes 2531 and a torsion spring 254; the flow guide tube 251 is fixedly arranged at the middle section of one of the connecting rods 24, the output end of the flow guide tube 251 is connected to the inner cavity of the connecting rod 24, the bottom end port of one of the rocking arms 23 is inserted into the inner cavity of the flow guide tube 251, and the bottom end port of the rocking arm 23 is rotatably connected to the flow guide tube 251; the first flow limiting plate 252 is fixedly arranged on the inner wall of the flow guide tube 251, and the first flow limiting plate 252 matches the radial cross-sectional shape of the inner cavity of the flow guide tube 251; a plurality of first flow limiting holes 2521 are opened. A first flow limiting plate 252 is provided, and a plurality of first flow limiting holes 2521 are distributed in an array around the central circumference of the above-mentioned first flow limiting plate 252; a second flow limiting plate 253 is fixedly provided on the inner wall of the bottom port of the rocker 23, and the second flow limiting plate 253 matches the radial cross-sectional shape of the inner cavity of the bottom port of the rocker 23, and the second flow limiting plate 253 abuts against the first flow limiting plate 252; a plurality of second flow limiting holes 2531 are opened on the second flow limiting plate 253, and a plurality of second flow limiting holes 2531 are distributed in an array around the central circumference of the second flow limiting plate 253; a torsion spring 254 is sleeved on the guide tube 251, and the two ends of the torsion spring 254 are respectively fixedly connected to the guide tube 251 and the rocker 23.

[0029] Further, if Figure 3 、 4 The swing bracket 2 further includes: a pair of vibration devices 26, which are respectively fixedly arranged at the bottom ends of the pair of connecting rods 24, and are used to drive the connecting rods 24 to vibrate.

[0030] Preferably, Figure 3 、 4 As shown in Figure 7, in this embodiment, the vibration device 26 includes: a mounting bracket 261, a protective cover 262, a motor 263 and a cam 264; the mounting bracket 261 is fixedly arranged at the bottom end of one of the connecting rods 24; the protective cover 262 is fixedly arranged on the mounting bracket 261; the motor 263 is fixedly arranged on the mounting bracket 261; the cam 264 is rotatably arranged on the mounting bracket 261, and the cam 264 is fixedly connected to the output shaft of the motor 263. The cam 264 is located in the inner cavity of the protective cover 262, and is used to drive the bottom end of the connecting rod 24 to vibrate reciprocatingly with the rotating connection between the connecting rod 24 and the rocker arm 23 as the rotating axis; during the operation of the vibration device 26, the motor 263 drives the cam 264 to rotate in the protective cover 262, and then uses the inertia of the cam 264 during the rotation process to drive the bottom end of the connecting rod 24 to vibrate.

[0031] Further, if Figure 3 、 4As shown, the swing bracket 2 also includes: a pair of magnetic constraint components 27, a pair of magnetic constraint components 27 are respectively arranged on a pair of rocking arms 23, and a pair of magnetic constraint components 27 are respectively connected to the top ends of a pair of connecting rods 24, for magnetically constraining the pair of connecting rods 24.

[0032] Further, if Figure 3 、 4 As shown in Figures 8, 9, and 10, the magnetic constraint assembly 27 includes: a permanent magnet 271, fixedly arranged on the top end of one of the connecting rods 24; a slide groove 272, fixedly arranged on the side wall of one of the rockers 23, and the slide groove 272 is arranged along the length direction of the rocker 23. When the connecting rod 24 is parallel to the rocker 23, the position of the permanent magnet 271 corresponds to the bottom end of the slide groove 272; a magnetic metal part 273, slidingly arranged in the inner cavity of the slide groove 272; a pair of traction ropes 274, fixedly arranged on the top plate 11 of the frame body 1, and the bottom ends of the pair of traction ropes 274 are connected to the magnetic metal part 273. The pair of traction ropes 274 are arranged on both sides of the main shaft 22, and are used to pull the magnetic metal part 273 to slide along the guide of the slide groove 272. In this embodiment, the traction rope 274 preferably uses a soft rope with low elasticity.

[0033] Preferably, Figure 3 、 4 As shown in Figures 8, 9, and 10, the magnetic metal part 273 includes: a bearing part 2731 and a connecting part 2732; the bottom of the bearing part 2731 is movably arranged in the inner cavity of the slide 272, and the bottom of the bearing part 2731 is cylindrical, the bottom diameter of the bearing part 2731 is larger than the width of the top port of the slide, and the height is smaller than the inner cavity depth of the slide 272, so that when the position of the magnetic metal part 273 corresponds to that of the permanent magnet 271, the top of the bearing part 2731 extends out of the slot of the slide 272 under the magnetic force of the permanent magnet 271, and is magnetically adsorbed on the permanent magnet 271; the connecting part 2732 is fixedly arranged on the top of the bearing part 2731, and the connecting part 2732 is connected to the bottom end of a pair of traction ropes 274.

[0034] When the driving device 5 drives the main shaft 22 to rotate a certain angle, the main shaft 22 drives the rocker 23 to deflect to one side by a certain angle. As the deflection angle of the rocker 23 increases, the magnetic metal part 273 slides from the bottom end of the slide toward the top of the slide groove 272 under the pull of the traction rope 274 until the magnetic metal part 273 is separated from the permanent magnet 271, thereby releasing the magnetic constraint on the top of the connecting rod 24; when the main shaft 22 drives the rocker 23 to deflect and reset, the magnetic metal part 273 slides to the bottom end of the slide groove 272 under the action of gravity, and the connecting rod 24 gradually approaches to be parallel to the rocker 23 under the action of gravity. As the permanent magnet 271 gradually approaches, the magnetic metal part 273 is finally magnetically adsorbed on the permanent magnet 271 again, thereby magnetically constraining the top of the connecting rod 24 again.

[0035] Further, if Figure 3 、 4 As shown in Figures 1 and 11, the movable spray boom 3 includes: a spray boom body 31, a pair of flow channels 32, a plurality of nozzles 33 and a plurality of air holes 34; the spray boom body 31 is arranged between a pair of connecting rods 24, and both ends of the spray boom body 31 are fixedly connected to the pair of connecting rods 24 respectively; a pair of flow channels 32 are arranged inside the spray boom body 31, one of the flow channels 32 is connected to the inner cavity of one of the connecting rods 24, and the other flow channel 32 is connected to the inner cavity of the other connecting rod 24; a plurality of nozzles 33 are fixedly arranged on the circumferential side wall of the spray boom body 31, and the input end of the nozzle 33 is connected to one of the flow channels 32; a plurality of air holes 34 are opened on the circumferential side wall of the spray boom, and a plurality of air holes 34 are connected to the other flow channel 32.

[0036] Preferably, Figure 1 、 2 As shown, in this embodiment, the pressure maintaining module 6 includes: an air pump 61 and a pressure relief valve 62; the air pump 61 is fixedly arranged on the top of the water tank 15, and the air outlet end of the air pump 61 is connected to the top of the inner cavity of the water tank 15, which is used to inject air into the water tank 15; the pressure relief valve 62 is fixedly arranged on the top of the water tank 15, and the air inlet end of the pressure relief valve 62 is connected to the top of the inner cavity of the water tank 15. When the internal pressure of the water tank 15 reaches a certain level, the air at the top of the inner cavity of the water tank 15 is discharged through the pressure relief valve 62.

[0037] Preferably, Figures 1-3 As shown, in this embodiment, a sensor (not shown in the figure) is installed at the rotational connection between the bottom end of the rocker 23 and the middle section of the connecting rod 24, which is used to detect the deflection angle of the connecting rod 24 relative to the rocker 23; a controller (not shown in the figure) is installed on the frame body 1, and the controller is electrically connected to the sensor, the drive device 5 and the air pump 61 to form a closed-loop control system. The controller dynamically adjusts the output power of the air pump 61 based on the deflection angle signal of the connecting rod 24 relative to the rocker 23, and at the same time facilitates the user to control the drive device 5 through the controller to accurately adjust the swing amplitude of the rocker 23, thereby avoiding damage to crops due to excessive swing amplitude of the rocker 23, or insufficient foliar fertilizer spraying due to too small swing amplitude, thereby significantly improving the operational flexibility and intelligent operation level of the device.

[0038] Further, if Figure 1 、 2As shown, the device further includes: a pair of fixed spray bars 7 and a pair of roller shutters 84 devices 8; a pair of fixed spray bars 7 are fixedly arranged on the inner wall of the frame body 1, and the pair of fixed spray bars 7 are respectively connected to the bottom of the inner cavity of the water tank 15, and the swing bracket 2 is located between the pair of fixed spray bars 7. Any fixed spray bar 7 is arranged in parallel with the side plate 16 of the frame body 1 for spraying foliar fertilizer solution. In this embodiment, a second valve is provided at the input end of the pair of fixed spray bars 7 for controlling the on and off of the fixed spray bars 7; a pair of roller shutters 84 devices 8 are respectively provided at the head end of the frame body 1 and the tail end of the frame body 1 for shielding the ports at the head and tail ends of the frame body 1.

[0039] Further, if Figure 1 、 2 As shown in Figures 12 and 13, the roller shutter 84 device 8 includes: a pair of supports 81, a reel 82, a pair of driving handles 83, a roller shutter 84 and a pair of brake assemblies; a pair of supports 81 are fixedly arranged on the top of the frame body 1; the reel 82 is arranged between the pair of supports 81, and the two ends of the reel 82 are respectively rotatably connected to the pair of supports 81; a pair of driving handles 83 are respectively fixedly arranged at the two ends of the reel 82, for driving the rotating shaft to rotate; the roller shutter 84 is rolled up on the reel 82, and the tail end of the roller shutter 84 is vertical to the ground, for covering the head end port of the frame body 1 or the tail end port of the frame body 1; a pair of brake assemblies are respectively arranged on a pair of supports 81, and a pair of brake assemblies are connected to the reel 82, for braking the reel 82.

[0040] In this embodiment, the user drives the reel 82 to rotate by controlling the driving handle 83, thereby controlling the reel 82 to reel in or release the roller curtain 84, so as to adjust the height between the tail end of the roller curtain 84 and the ground, so as to ensure that the crops can smoothly pass through the head end port of the frame body 1 and enter the inner cavity of the frame body 1. In addition, the present device utilizes a pair of roller curtains 84 of the roller curtain 84 device 8 to block the ports at the head end and the tail end of the frame body 1, and utilizes the movable tent rod and the fixed spray rod 7 to perform foliar topdressing on the crops in the inner cavity of the frame body 1, which can effectively reduce the escape speed of the atomized foliar fertilizer solution in the inner cavity of the frame body 1, enhance the adhesion effect of the atomized foliar fertilizer solution on the leaves of the crops, and effectively prevent the operators from inhaling the atomized foliar fertilizer solution, thereby enhancing the practicality of the present device.

[0041] Further, if Figure 1 、 2As shown in Figures 12 and 13, the braking assembly includes: a guide groove 851, a movable block 852 and a plurality of springs 853. The guide groove 851 is arranged on one of the supports 81; the movable block 852 is arranged in the inner cavity of the guide groove 851 along the axial sliding of the guide groove 851, and the bottom of the movable block 852 abuts against the circumferential side wall surface of the reel 82 for braking the reel 82; a plurality of springs 853 are arranged in the inner cavity of the guide groove 851, and the two ends of any spring 853 are respectively connected to the movable block 852 and the top wall of the inner cavity of the guide groove 851 for elastically supporting the movable block 852.

[0042] When the equipment is running, the air pump 61 of the pressure maintaining module 6 injects air into the water tank 15. When the air pressure in the inner cavity of the water tank 15 reaches a certain level, the air at the top of the inner cavity of the water tank 15 is discharged through the pressure relief valve 62, so that the pressure of the inner cavity environment of the water tank 15 fluctuates slightly within the expected range, thereby maintaining the inner cavity environment pressure of the water tank 15 stable; under the drive of the higher pressure environment, a part of the foliar fertilizer solution in the water tank 15 is sprayed out into the inner cavity of the frame body 1 through the fixed spray rod 7; at the same time, the user drags the frame body 1 forward. During the movement of the frame body, two ridges of crops planted on the cultivated land enter the inner cavity of the frame body 1 through the head end port of the frame body 1, and leave the inner cavity of the frame body 1 at the tail end port of the frame body 1, and pass through the two sides of the swing bracket 2 respectively. In the process of the crops passing through the inner cavity of the frame body 1, a pair of fixed spray rods 7 spray the foliar fertilizer solution on the leaves of the crops, thereby performing foliar topdressing on the crops.

[0043] During the forward movement of the vehicle body 1, the driving device 5 drives the main shaft 22 to rotate back and forth periodically, thereby using the main shaft 22 to drive a pair of rocking arms 23, causing the bottom ends of the rocking arms 23 to swing back and forth. During one cycle of the reciprocating swing of a pair of rocking arms 23, first, the rocking arms 23 drive a pair of connecting rods 24 and a plurality of movable spraying arms 3 arranged thereon to approach the crops on one side. As the deflection angle of the rocking arms 23 increases, the magnetic metal piece 273 slides from the bottom end of the chute 272 to the top end of the chute 272. The end of the magnetic metal part 273 is separated from the permanent magnet 271, thereby releasing the magnetic constraint on the top of the connecting rod 24, and the angle between the connecting rod 24 and the rocker 23 is also increased, which leads to an increase in the intersection area of ​​the first flow limiting hole 2521 provided on the first flow limiting plate 252 and the second flow limiting hole 2531 provided on the second flow limiting plate 253. The foliar fertilizer solution stored in the water tank 15 flows through one of the transmission pipelines 4 and the diversion blind hole 221 connected thereto, the rocker 23, and the like in sequence. The inner cavity, the second flow limiting hole 2531, the first flow limiting hole 2521, and the inner cavity of the connecting rod 24 enter one of the flow channels 32 in the movable spray rod 3, and are finally sprayed out through the nozzle 33 connected to the flow channel 32, so that the foliar fertilizer solution is sprayed on the back of the leaves of the crops, thereby achieving foliar topdressing of the crops; at the same time, the air at the top of the inner cavity of the water tank 15 flows in sequence through another transmission pipeline 4 and the guide blind hole 221 connected thereto, the inner cavity of the rocker 23, the second flow limiting hole 2531, the first flow limiting hole 2521, and the inner cavity of the connecting rod 24. The inner cavity of the flow limiting hole 2521 and the connecting rod 24 enters another flow channel 32 in the movable spray boom 3, and is finally ejected through the air hole 34 connected to the flow channel 32, and then the air flow ejected through the air hole 34 is used to accelerate the diffusion efficiency of the atomized leaf fertilizer solution in the inner cavity space of the frame body 1, thereby enhancing the foliar spraying effect of the device on the leaf fertilizer solution; then, after completing the foliar topdressing of the crops on one side, several movable spray booms 3 approach the crops on the other side under the drive of the swinging bracket 2.

[0044] While the driving device 5 controls the swing bracket 2 to swing, the pair of vibration devices 26 respectively drive the pair of connecting rods 24 to vibrate. When the permanent magnet 271 provided on the connecting rod 24 is separated from the magnetic metal piece 273 provided on the rocking arm 23, the connecting rod 24 loses its magnetic constraint, causing the amplitude of the pair of connecting rods 24 and the several movable spraying bars 3 provided thereon to increase. As the swing angle of the rocking arm 23 increases, the movable spraying bar 3 provided at the bottom end of the connecting rod 24 first contacts the crop, and under the elastic support of the torsion spring 254, it gradually presses the main stem of the crop, thereby bringing The leaves of the crops are shaken to reduce the obstruction of the stacked leaves of the crops to the atomized foliar fertilizer solution, thereby enhancing the adhesion rate of the foliar fertilizer solution on the back of the crop leaves and the absorption rate of the foliar fertilizer solution by the crops; and after the movable spraying rod 3 arranged at the bottom end of the connecting rod 24 contacts the crops, as the rocker 23 further deflects, the movable spraying rod 3 arranged at the top end of the pair of connecting rods 24 greatly approaches the direction of the crops, thereby reducing the atomized spraying distance of the foliar fertilizer solution of the movable spraying rod 3 arranged at the middle and top ends of the connecting rod 24, thereby enhancing the foliar spraying effect on the crops.

[0045] Above, refer to Figures 1 to 13 A foliar fertilizer spraying device for soybean planting according to an embodiment of the present invention is described, which has the following beneficial effects: 1. This device is provided with a swing bracket 2 and a plurality of movable spray bars 3 in the inner cavity of a semi-enclosed frame body 1, and a driving device 5 is used to control the reciprocating swing of the swing bracket 2, thereby driving the plurality of movable spray bars 3 to reciprocate and approach the crops located on both sides of the swing bracket 2 during the movement of the frame body 1, thereby achieving the bottom-up spraying effect of the foliar fertilizer solution. By simplifying its own structure, it solves the problem of increased foliar fertilizer cost caused by the need to arrange the spray device over a large area in the prior art, and reduces the escape of the atomized foliar fertilizer solution. The dispersion speed is increased, thereby improving the utilization rate of the foliar fertilizer solution; secondly, the device provides a window on the top plate 11 of the frame body 1, so that the user can observe the operation status of the equipment in the inner cavity of the frame body 1 through the window at any time, so that the user can repair the equipment in time when a failure occurs; thirdly, the device provides a vibration device 26 at the bottom end of the connecting rod 24 to drive the connecting rod 24 and the movable spray rod 3 to vibrate, so that the branches and leaves of the crops are easier to insert into the intervals between the several movable spray rods 3, so as to prevent the branches and leaves of the crop plants from being damaged during the process of foliar topdressing.

[0046] 2. The swing bracket 2 of the present device is provided with a flow limiting assembly 25 at the rotating connection between the rocking arm 23 and the connecting rod 24, and a vibration device 26 is provided at the bottom end of each pair of connecting rods 24. When the swing bracket 2 drives the plurality of movable spray bars 3 to swing back and forth, when the rocking arm 23 gradually tends to a vertical state after being separated from the crops, the connecting rod 24 gradually tends to be parallel to the rocking arm 23 under the combined action of the elastic force of the torsion spring 254 and gravity, so that the first flow limiting hole 2521 and the second flow limiting hole 2531 are staggered with each other, preventing the foliar fertilizer solution from entering the connecting rod 24 through the rocking arm 23, and further preventing the foliar fertilizer solution from being sprayed through the movable spray bar 3, thereby avoiding the problem of foliar fertilizer solution waste caused by excessive atomization spraying distance, and improving the utilization rate of the foliar fertilizer solution.

[0047] 3. This device utilizes a torsion spring 254 to elastically support the connecting rod 24, so that when the plurality of movable spray bars 3 are driven by the rocker 23 to approach the crops, the movable spray bar 3 arranged at the bottom end of the connecting rod 24 preferentially presses the main stem of the crop near the root, thereby transmitting the vibration generated by the vibration device 26 to the main stem of the crop, driving the leaves of the crop to shake, reducing the obstruction of the stacked leaves of the crop to the atomized foliar fertilizer solution, and enhancing the adhesion rate of the foliar fertilizer solution on the back of the crop leaves and the absorption rate of the foliar fertilizer solution by the crops; and can also effectively prevent the movable spray bar 3 arranged at the top end of the connecting rod 24 from excessively pressing the relatively lush functional leaves at the top of the plant, causing them to be damaged.

[0048] 4. The device is provided with a magnetic restraint component 27, so that when the rocker 23 approaches the vertical state, the magnetic force between the magnetic metal part 273 and the permanent magnet 271 is used to restrain the top of the connecting rod 24, preventing the connecting rod 24 from continuing to swing under the drive of the vibration device 26, thereby enhancing the structural stability of the swing bracket 2, preventing the foliar fertilizer solution from being continuously sprayed through the movable spray bar 3 when the rocker 23 is in the vertical state, and saving the cost of spraying the foliar fertilizer solution; and the magnetic restraint component 27 adopts The traction rope 274 pulls the magnetic metal part 273 to move it away from the permanent magnet 271, thereby releasing the magnetic constraint on the top of the connecting rod 24, greatly enhancing the operation reliability of the swing bracket 2, and effectively avoiding the problem that the friction resistance of the contact surface between the magnetic metal part 273 and the permanent magnet 271 increases due to the presence of soil or other impurities between the magnetic metal part 273 and the permanent magnet 271, which in turn leads to excessive squeezing of crops and damage to crops during the process of the swing bracket 2 driving the movable spray rod 3 to swing and spray the foliar fertilizer solution.

[0049] It should be noted that, in this specification, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the elements.

[0050] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. After reading the above description, various modifications and substitutions of the present invention will become apparent to those skilled in the art. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A foliar fertilizer spraying device for soybean planting, characterized in that: Include: A swing bracket is provided in the inner cavity of the frame body, and during the movement of the frame body, crops planted in the cultivated land pass through both sides of the swing bracket, and a viewing window is provided on the top plate of the frame body; A plurality of movable spray bars are arranged on the swing bracket, wherein the inner cavities of the plurality of movable spray bars are all connected with the inner cavity of the swing bracket, and are used for spraying foliar fertilizer solution; a pair of transmission pipelines, provided on the frame body, wherein any one of the transmission pipelines is connected to the water tank of the frame body and the inner cavity of the swing bracket; A driving device, fixedly arranged on the frame body, connected to the swing bracket, and used for driving the swing bracket to swing back and forth; The pressure maintaining module is arranged on the water tank to maintain the stable pressure environment of the inner cavity of the water tank.

2. A foliar fertilizer spraying device for soybean planting according to claim 1, characterized in that: The swing bracket comprises: a pair of bearing seats fixedly disposed on the bottom of the top plate of the frame body, the pair of bearing seats being located between a pair of side plates of the frame body; a main shaft, disposed between the pair of side plates, with both ends of the main shaft being rotatably connected to the pair of bearing seats, and the main shaft being connected to the driving device; a pair of diversion blind holes, respectively provided on the end surfaces at both ends of the main shaft, the pair of diversion blind holes being rotatably connected to the output ends of the pair of transmission pipelines, one of the transmission pipelines being connected between one of the diversion blind holes and the top of the inner cavity of the water tank, and the other transmission pipeline being connected between the other of the diversion blind holes and the bottom of the inner cavity of the water tank; A pair of rockers, fixedly disposed on the circumferential side wall of the main shaft, wherein the central axis of any one of the rockers is perpendicular to the central axis of the main shaft, and the inner cavities of the pair of rockers are respectively communicated with the pair of guide blind holes; a pair of connecting rods, movably disposed between the pair of rocking arms, wherein the middle sections of the pair of connecting rods are rotatably connected to the bottom ends of the pair of rocking arms, respectively, and the pair of rocking arms are fixedly connected to the two ends of the movable spray booms, respectively, and any one of the connecting rods connects one of the rocking arms with the inner cavity of the plurality of movable spray booms; A pair of current limiting components are respectively arranged at the rotational connections between the pair of connecting rods and the pair of rocking arms.

3. A foliar fertilizer spraying device for soybean planting as claimed in claim 2, characterized in that: The current limiting component comprises: a flow guide tube fixedly disposed at the middle section of one of the connecting rods, the output end of the flow guide tube being in communication with the inner cavity of the connecting rod, the bottom end port of one of the rocking arms being inserted into the inner cavity of the flow guide tube, the bottom end port of the rocking arm being rotatably connected to the flow guide tube; a first flow limiting plate, fixedly disposed on the inner wall of the flow guiding tube, wherein the first flow limiting plate matches the radial cross-sectional shape of the inner cavity of the flow guiding tube; A plurality of first flow limiting holes are provided on the first flow limiting plate, wherein the plurality of first flow limiting holes are distributed in an array around the central circumference of the first flow limiting plate; a second flow limiting piece fixedly disposed on the inner wall of the bottom port of the rocker, the second flow limiting piece matching the radial cross-sectional shape of the inner cavity of the bottom port of the rocker, and abutting against the first flow limiting piece; a plurality of second flow limiting holes, formed on the second flow limiting plate, wherein the plurality of second flow limiting holes are distributed in an array around the central circumference of the second flow limiting plate; A torsion spring is sleeved on the guide tube, and two ends of the torsion spring are respectively fixedly connected to the guide tube and the rocker.

4. A foliar fertilizer spraying device for soybean planting as claimed in claim 3, characterized in that: The swing bracket further includes: a pair of vibration devices, and the pair of vibration devices are respectively fixedly arranged on the bottom ends of the pair of connecting rods.

5. A foliar fertilizer spraying device for soybean planting according to claim 2, characterized in that: The swing bracket also includes: a pair of magnetic constraint components, which are respectively arranged on the pair of rocking arms, and the pair of magnetic constraint components are respectively connected to the top ends of the pair of connecting rods for magnetically constraining the pair of connecting rods.

6. A foliar fertilizer spraying device for soybean planting according to claim 5, characterized in that: The magnetic restraint assembly includes: a permanent magnet, fixedly disposed on the top end of one of the connecting rods; a chute fixedly provided on a side wall of one of the rocking arms, the chute being provided along the length direction of the rocking arm, wherein when the connecting rod is parallel to the rocking arm, the position of the permanent magnet corresponds to the bottom end of the chute; A magnetic metal part is slidably disposed in the inner cavity of the slide groove; A pair of traction ropes are fixedly arranged on the top plate of the frame body, the bottom ends of the pair of traction ropes are connected to the magnetic metal parts, and the pair of traction ropes are arranged on both sides of the main shaft for pulling the magnetic metal parts to slide along the guide of the slide groove.

7. A foliar fertilizer spraying device for soybean planting according to claim 2, characterized in that: The movable spray boom comprises: A spray rod body is arranged between the pair of connecting rods, and both ends of the spray rod body are fixedly connected to the pair of connecting rods respectively; a pair of flow channels disposed inside the spray bar body, wherein one of the flow channels is communicated with the inner cavity of one of the connecting rods, and the other flow channel is communicated with the inner cavity of the other connecting rod; a plurality of nozzles fixedly arranged on the circumferential side wall of the spray bar body, wherein the input end of the nozzle is connected to one of the flow channels; A plurality of air holes are provided on the circumferential side wall of the spray bar, and the plurality of air holes are communicated with another flow channel.

8. A foliar fertilizer spraying device for soybean planting according to claim 1, characterized in that: Also includes: a pair of fixed spray bars fixedly arranged on the inner wall of the frame body, the pair of fixed spray bars being respectively connected to the bottom of the inner cavity of the water tank, the swing bracket being located between the pair of fixed spray bars, any one of the fixed spray bars being arranged in parallel with the side plate of the frame body, for spraying the foliar fertilizer solution; A pair of rolling curtain devices are respectively arranged at the head end and the tail end of the frame body, and are used for covering the ports at the head and tail ends of the frame body.

9. A foliar fertilizer spraying device for soybean planting according to claim 8, characterized in that: The rolling curtain device comprises: A pair of supports, fixedly arranged on the top of the frame body; a reel, disposed between the pair of supports, with both ends of the reel rotatably connected to the pair of supports respectively; A pair of driving handles, respectively fixedly provided at both ends of the reel, for driving the rotating shaft to rotate; a rolling curtain, rolled up on the reel, with the tail end of the rolling curtain vertically facing the ground, for shielding the head end port of the frame body or the tail end port of the frame body; A pair of brake assemblies are respectively arranged on the pair of supports, and the pair of brake assemblies are connected to the reel and are used for braking the reel.

10. A foliar fertilizer spraying device for soybean planting according to claim 9, characterized in that: The brake assembly comprises: a guide groove, provided on one of the supports; a movable block, slidably disposed in the inner cavity of the guide groove along the axial direction of the guide groove, wherein the bottom of the movable block abuts against the circumferential side wall surface of the reel, and is used to brake the reel; A plurality of springs are arranged in the inner cavity of the guide groove, and the two ends of any one of the springs are respectively connected to the movable block and the inner cavity top wall of the guide groove for elastically supporting the movable block.

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