Line-spacing-adjustable pesticide spraying device suitable for wide and narrow rows of corn

Abstract

The utility model discloses a row-spacing-adjustable pesticide spraying device suitable for wide and narrow rows of corn, and relates to the field of agricultural machinery. The pesticide spraying device comprises a pesticide spraying frame, a row spacing adjusting device, a spraying rod and a connecting support. The pesticide spraying frame comprises a top plate, a back plate, two side plates and two motor mounting grooves; the line spacing adjusting device is contained in a space defined by the pesticide spraying frame; the line spacing adjusting device comprises two rotating lead screws, two motors and four sliding blocks; wherein one end of the first rotating lead screw is connected with the first motor through a first coupler, and the other end of the first rotating lead screw is connected with the side wall of the second motor mounting groove through a first bearing support; clockwise threads and anticlockwise threads are arranged at the two ends of the first rotating lead screw correspondingly, and a first sliding block and a second sliding block are arranged at the threads correspondingly; each sliding block is connected with a spraying rod through a rotary coupler; the whole pesticide spraying device is installed on a pesticide spraying vehicle through a connecting support. The pesticide spraying device can adapt to different wide and narrow row spacing, and meanwhile operation complexity and cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a spraying device with adjustable row spacing suitable for corn with wide and narrow rows. Background Technology

[0002] In modern agricultural production, sprayers, as key agricultural machinery, are widely used to apply various pesticides to control pests and diseases and promote crop growth. The efficiency and effectiveness of sprayers directly affect crop yield and quality; therefore, the design and performance of sprayers have always been a focus of agricultural machinery research. Currently, most sprayers are designed with fixed row spacing, primarily suitable for fields with specific row spacing. However, with the diversification of agricultural production methods, row spacing in farmland is becoming increasingly irregular. Especially in the cultivation of crops such as corn and soybeans, row spacing often varies significantly due to different planting habits and crops. This inconsistency in row spacing poses a challenge to the effective use of sprayers. Traditional sprayers typically face the following problems when used in fields with varying row spacing: 1) Fixed-row-spacing sprayers cannot adapt to irregular row spacing in the field, resulting in uneven spray coverage and affecting application effectiveness; 2) Sprayers designed for different crop row spacings are usually expensive and complex to maintain, which limits their application in diversified planting patterns. Summary of the Invention

[0003] To address the problems mentioned in the background art, this utility model provides a spraying device with adjustable row spacing suitable for corn with varying row widths, which can adapt to different row spacings while reducing operational complexity and cost.

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

[0005] This utility model provides an adjustable row spacing spraying device suitable for corn with wide and narrow rows, including: a spraying frame, a row spacing adjustment device, a spray bar, and a connecting bracket; the spraying frame includes a top plate, a back plate, two side plates, and two motor mounting slots; the two side plates are respectively located at both ends of the back plate and the top plate; the top plate, back plate, and side plates are perpendicularly connected to each other in pairs; the two motor mounting slots are respectively arranged inside the two side plates; the row spacing adjustment device is accommodated within the space enclosed by the top plate, the back plate, and the two side plates;

[0006] The row spacing adjustment device includes two lead screws, two motors, and four sliders; the two motors are respectively located in two motor mounting slots; wherein, the two motors include a first motor and a second motor; the two motor mounting slots are respectively a first motor mounting slot and a second motor mounting slot; the two lead screws include a first lead screw and a second lead screw; the four sliders include a first slider, a second slider, a third slider, and a fourth slider;

[0007] The first motor is located in the first motor mounting slot; one end of the first lead screw is connected to the first motor through the first coupling; the other end of the first lead screw is connected to the side wall of the second motor mounting slot through the first bearing support; the two ends of the first lead screw have clockwise threads and counterclockwise threads respectively; a first slider and a second slider are respectively arranged on the clockwise threads and counterclockwise threads of the first lead screw.

[0008] The second motor is located in the second motor mounting slot; one end of the second lead screw is connected to the side wall of the first motor mounting slot through the second bearing support; the other end of the second lead screw is connected to the second motor through the second coupling; the middle part of the second lead screw has clockwise threads and counterclockwise threads respectively; a third slider and a fourth slider are respectively arranged on the clockwise threads and counterclockwise threads of the second lead screw.

[0009] Each slider is connected to one end of a spray bar via a rotary connector, and the other end of the spray bar is equipped with a nozzle; one end of the connecting bracket is connected to the back plate of the spraying frame; the other end of the connecting bracket is connected to the spraying vehicle.

[0010] Optionally, the thread length of the clockwise thread and the counterclockwise thread is 40~80cm.

[0011] Optionally, the rotation angle of the rotary connector is 5° to 30°.

[0012] Optionally, the other end of the spray bar is also provided with a nozzle cover; the nozzle cover is arranged around the nozzle.

[0013] Optionally, the connecting bracket includes a cross suspension, two bottom support rods, a support crossbar, an electric push rod, and four connecting slots; the two bottom support rods are a first bottom support rod and a second bottom support rod; the four connecting slots are a first connecting slot, a second connecting slot, a third connecting slot, and a fourth connecting slot; the first connecting slot and the second connecting slot are fixed to the back plate of the spraying rack; the third connecting slot and the fourth connecting slot are fixed to the front of the spraying vehicle.

[0014] The cross suspension includes two horizontal bars, two vertical bars, and an X-shaped cross bar; the two horizontal bars are the first horizontal bar and the second horizontal bar; the two vertical bars are the first vertical bar and the second vertical bar.

[0015] One end of the first vertical rod is connected to the upper end of the first connecting groove; the other end of the first vertical rod is connected to the upper end of the third connecting groove; one end of the second vertical rod is connected to the upper end of the second connecting groove; the other end of the second vertical rod is connected to the upper end of the fourth connecting groove; the first horizontal rod and the second horizontal rod are both located between the first vertical rod and the second vertical rod; an X-shaped cross rod is provided in the square space enclosed by the two horizontal rods and the two vertical rods;

[0016] One end of the first bottom support rod is connected to the lower end of the first connecting groove; the other end of the first bottom support rod is connected to the lower end of the third connecting groove; one end of the second bottom support rod is connected to the lower end of the second connecting groove; the other end of the second bottom support rod is connected to the lower end of the fourth connecting groove; the support crossbar is located between the first bottom support rod and the second bottom support rod; one end of the electric actuator is connected to the middle position of the support crossbar; the other end of the electric actuator is connected to the front of the spraying vehicle.

[0017] Optionally, the nozzle is 10-30cm above the ground.

[0018] According to the specific embodiments provided by this utility model, the following technical effects are disclosed:

[0019] The spraying device provided by this utility model, applicable to different row spacings, allows for several advantages. Firstly, the distance between adjacent spray booms can be adjusted via a row spacing adjustment device, enabling rapid adaptation to varying row widths in the field. Secondly, the distance between the nozzle and the ground can be adjusted by adjusting the connecting bracket, thus quickly adapting to spraying operations with plants of different row spacings and heights. Furthermore, the nozzle angle and distance to the ground can be fine-tuned by adjusting the rotating connector, achieving precise and optimized adjustment of the spraying operation. Moreover, this spraying device features a simple structure and extremely convenient adjustment methods, effectively improving the flexibility and efficiency of spraying operations while reducing operational complexity and spraying costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an isometric view of the overall spraying device of this utility model applicable to different row spacings;

[0022] Figure 2 This is a front view of the spraying device of this utility model applicable to different row spacings;

[0023] Figure 3 This is a left view of the spraying device of this utility model applicable to different row spacings;

[0024] Figure 4 This is a top view of the spraying device of this utility model applicable to different row spacings;

[0025] Figure 5 This is an overall isometric view of the spraying device of this utility model, applicable to different row spacings, installed on a spraying vehicle;

[0026] The components in the diagram are labeled as follows: spray frame 1, top plate 101, back plate 102, side plate 103, first motor mounting slot 104, second motor mounting slot 105; spray bar 2; first motor 201, second motor 202; first lead screw 203, clockwise thread 2031, counterclockwise thread 2032; second lead screw 204, clockwise thread 2041, counterclockwise thread 2042; first slider 205, second slider 206, third slider 207, fourth slider 208; first coupling 209. First bearing support 210, second bearing support 211, second coupling 212; rotary connector 3; nozzle cover 4; support crossbar 501, electric actuator 502, first bottom support rod 503, second bottom support rod 504; first connecting groove 601, second connecting groove 602, third connecting groove 603, fourth connecting groove 604; first vertical rod 701, second vertical rod 702, first horizontal rod 703, second horizontal rod 704, X-shaped crossbar 705; liquid tank 801, engine 802, seat 803, steering wheel 804, wheel 805, chassis 806. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] The purpose of this invention is to provide a spraying device with adjustable row spacing suitable for corn fields of varying widths, capable of adapting to different row spacings while reducing operational complexity and cost. To make the above-mentioned objectives, features, and advantages of this invention more apparent and understandable, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is an isometric view of the overall spraying device of this utility model applicable to different row spacings; Figure 2This is a front view of the spraying device of this utility model applicable to different row spacings; Figure 3 This is a left view of the spraying device of this utility model applicable to different row spacings; Figure 4 This is a top view of the spraying device of this utility model applicable to different row spacings. (See image below.) Figures 1 to 4 As shown, this utility model discloses an adjustable spraying device for corn with wide and narrow rows, comprising: a spraying frame 1, a row spacing adjustment device, a spraying rod 2, and a connecting bracket.

[0030] Specifically, such as Figures 1 to 4 As shown, the spraying rack 1 includes a top plate 101, a back plate 102, two side plates 103, and two motor mounting slots. The two motor mounting slots are a first motor mounting slot 104 and a second motor mounting slot 105. The two side plates 103 are located at opposite ends of the back plate 102 and the top plate 101, respectively. The top plate 101, back plate 102, and side plates 103 are perpendicularly connected to each other in pairs. The two motor mounting slots 104 and 105 are respectively located inside the two side plates 103. The row spacing adjustment device is housed within the space enclosed by the top plate 101, back plate 102, and two side plates 103. That is, the row spacing adjustment device is entirely arranged inside the spraying rack 1.

[0031] Specifically, such as Figures 1 to 4 As shown, the row spacing adjustment device includes two lead screws, two motors, and four sliders. The two motors are located in two motor mounting slots 104 and 105, respectively, which protect the motors. The two motors include a first motor 201 and a second motor 202. The two lead screws include a first lead screw 203 and a second lead screw 204. The four sliders include a first slider 205, a second slider 206, a third slider 207, and a fourth slider 208.

[0032] The first motor 201 is located within the first motor mounting slot 104; one end of the first lead screw 203 is connected to the first motor 201 via a first coupling 209; the other end of the first lead screw 203 is connected to the side wall of the second motor mounting slot 105 via a first bearing support 210. The two ends of the first lead screw 203 have clockwise threads 2031 and counterclockwise threads 2031, respectively; a first slider 205 and a second slider 206 are respectively arranged on the clockwise threads 2031 and counterclockwise threads 2032 of the first lead screw 203.

[0033] The second motor 202 is located in the second motor mounting slot 105; one end of the second lead screw 204 is connected to the side wall of the first motor mounting slot 104 through the second bearing support 211; the other end of the second lead screw 204 is connected to the second motor 202 through the second coupling 212; the middle part of the second lead screw 204 has a clockwise thread 2041 and a counterclockwise thread 2042 respectively; a third slider 207 and a fourth slider 208 are respectively arranged on the clockwise thread 2041 and the counterclockwise thread 2042 of the second lead screw 204.

[0034] Each slider is connected to one end of a spray bar 2 via a rotary connector 3, and the other end of the spray bar 2 is equipped with a nozzle. A single spray bar 2 is generally curved and hollow inside. The spray bar 2 can be welded to the rotary connector 3.

[0035] In one exemplary embodiment, the other end of the spray bar 2 is further provided with a nozzle cover 4; the nozzle cover 4 is arranged around the nozzle. The nozzle cover 4 can effectively reduce pesticide drift, reduce pesticide damage to plants, and protect the nozzle.

[0036] from Figure 2 As can be seen, the first lead screw 203 and the second lead screw 204 are staggered in height, for example, the first lead screw 203 is located above the second lead screw 204. The motor is connected to the shaft end arranged on one side of the lead screw by a coupling. Taking the first lead screw 203 as an example, the rotation of the first motor 201 can drive the first lead screw 203 to rotate. Utilizing the precision fit structure between the thread and the slider, the rotational motion of the lead screw can be effectively converted into the linear left-right movement of the slider. In this way, the slider can be precisely displaced along the axial direction of the lead screw, thereby achieving precise adjustment of the distance between adjacent spray bars 2. On the same lead screw, the two sliders move in opposite directions. Specifically, when the first lead screw 203 rotates clockwise, the first slider 205 moves to the right, while the second slider 206 moves to the left. That is to say, both the first slider 205 and the second slider 206 move towards the center, and the distance between them decreases. Conversely, when the first lead screw 203 rotates counterclockwise, the first slider 205 and the second slider 206 move to opposite ends respectively, increasing the distance between them. In this way, the linear left-right movement of the two sliders on a single lead screw will drive the two spraying rods 2 to move simultaneously in opposite directions, achieving synchronous adjustment of the distance between the spraying rods 2 and ensuring the accuracy and uniformity of spraying. The motor model can be selected according to actual needs; this invention does not change its working method, and its conventional functions are sufficient.

[0037] Similarly, when the second lead screw 204 rotates clockwise, the distance between the third slider 207 and the fourth slider 208 decreases. Conversely, when the second lead screw 204 rotates counterclockwise, the distance between the third slider 207 and the fourth slider 208 increases.

[0038] The thread lengths of the clockwise and counterclockwise threads are 40-80 cm, preferably 60 cm. Generally, the clockwise thread 2031 of the first lead screw 203, the clockwise thread 2041 of the second lead screw 204, the counterclockwise thread 2042 of the second lead screw 204, and the counterclockwise thread 2032 of the first lead screw 203 are staggered along the length of the lead screw, and in general, all threads basically cover the entire length direction.

[0039] This utility model's spraying device is suitable for spraying and weeding operations with equal spacing of 40cm, 60cm, 65cm, and 75cm for planting corn, soybeans, etc. It can also accommodate weeding and spraying operations with alternating wide and narrow row spacing, such as 40cm, 60cm, 40cm or 40cm, 80cm, 40cm. For example, when performing weeding and spraying operations on corn with alternating wide and narrow row spacing of 40cm, 60cm, and 40cm, the distance between the third slider 207 and the fourth slider 208 can be adjusted to 60cm by first rotating the second screw 204 clockwise or counterclockwise. Then, the distance between the first slider 205 and the third slider 207 can be adjusted to 40cm by rotating the first screw 203 clockwise or counterclockwise. At this time, the distance between the second slider 206 and the fourth slider 208 is also 40cm, which can accommodate spraying operations with alternating wide and narrow row spacing.

[0040] Of course, in practical applications, other numbers of motors, lead screws, sliders, and spray booms can be set to accommodate larger / smaller scale spraying operations. The lead screw can also have more than two threaded locations to accommodate more sliders and spray booms.

[0041] Specifically, such as Figures 1 to 4 As shown, the connecting bracket includes a cross suspension, two bottom support rods, a support crossbar 501, an electric actuator 502, and four connecting slots. The two bottom support rods are a first bottom support rod 503 and a second bottom support rod 504. The four connecting slots are a first connecting slot 601, a second connecting slot 602, a third connecting slot 603, and a fourth connecting slot 604; the first connecting slot 601 and the second connecting slot 602 are fixed to the back plate 102 of the spraying frame 1; the third connecting slot 603 and the fourth connecting slot 604 are fixed to the front of the spraying vehicle.

[0042] The cross suspension includes two horizontal bars, two vertical bars, and an X-shaped crossbar 705. The two vertical bars are the first vertical bar 701 and the second vertical bar 702; the two horizontal bars are the first horizontal bar 703 and the second horizontal bar 704.

[0043] like Figure 3 and Figure 4 As shown, one end of the first vertical rod 701 is connected to the upper end of the first connecting groove 601. The other end of the first vertical rod 701 is connected to the upper end of the third connecting groove 603. One end of the second vertical rod 702 is connected to the upper end of the second connecting groove 602. The other end of the second vertical rod 702 is connected to the upper end of the fourth connecting groove 604. The first horizontal rod 703 and the second horizontal rod 704 are both located between the first vertical rod 701 and the second vertical rod 702. An X-shaped crossbar 705 is provided within the square space enclosed by the two horizontal rods and the two vertical rods.

[0044] One end of the first bottom support rod 503 is connected to the lower end of the first connecting groove 601. The other end of the first bottom support rod 503 is connected to the lower end of the third connecting groove 603. One end of the second bottom support rod 504 is connected to the lower end of the second connecting groove 602. The other end of the second bottom support rod 504 is connected to the lower end of the fourth connecting groove 604. The support crossbar 501 is located between the first bottom support rod 503 and the second bottom support rod 504. One end of the electric actuator 502 is connected to the middle position of the support crossbar 501. The other end of the electric actuator 502 is connected to the front of the spraying vehicle.

[0045] In the connecting bracket, the precise extension and retraction adjustment of the electric actuator 502 drives the movement of the cross suspension and the bottom support rod, thereby realizing the raising and lowering of the sprayer frame 1. This ensures that the spraying operation is carried out at the optimal height, thus maintaining a stable spraying effect. For example, when the electric actuator 502 retracts, it can drive the sprayer frame 1 to rise; conversely, when the electric actuator 502 extends, it can drive the sprayer frame 1 to fall. The electric actuator model can be selected according to actual needs. This utility model does not change its working method; its conventional function is sufficient.

[0046] The slider and the spray bar 2 are connected by a rotary connector 3. The rotary connector 3 ensures that the spray bar 2 can be manually adjusted in angle while maintaining an effective connection with the slider. The adjustable angle is 5° to 30°. By manually adjusting the rotary connector 3, the spray angle of the nozzle can be adjusted, and the height of the nozzle above the ground can be finely adjusted. The height of the nozzle above the ground is typically 10 to 30 cm.

[0047] This spraying device ensures that the distance between adjacent spray booms can quickly adapt to different row spacing conditions, optimizing the operational effect and improving the flexibility and efficiency of spraying operations. At the same time, the device's simple row spacing and height adjustment methods reduce operational complexity and costs, enabling farmers to perform spraying operations more conveniently in different crops and field environments.

[0048] Figure 5 This diagram shows an overall axonometric view of the spraying device of this invention, applicable to different row spacings, installed on a spraying vehicle. Figure 5 In the illustrated application embodiment, the spraying vehicle is a high-clearance tractor. The spraying device of this utility model is integrally arranged in front of the high-clearance tractor. The spraying vehicle structure includes at least a pesticide tank 801, an engine 802, a seat 803, a steering wheel 804, wheels 805, and a chassis 806. Figure 5 As shown, one end of the entire connecting bracket is connected to the back plate 102 of the spraying frame 1; the other end of the connecting bracket is connected to the front of the spraying vehicle. More specifically, the third connecting groove 603 and the fourth connecting groove 604 can be fixed to the chassis 6 at the front of the spraying vehicle. The other end of the electric actuator 502 can also be connected to the chassis 6 at the front of the vehicle.

[0049] certainly, Figure 5 This illustration merely demonstrates one possible installation method of the spraying device of this utility model on a spraying vehicle. Other installation methods or installations at other locations on the spraying vehicle are also possible. The spraying vehicle is not limited to a high-clearance tractor. However, the spraying vehicle itself is not within the scope of protection of this utility model; this utility model protects the spraying device that can be applied to such a vehicle. In use, the spray boom 2 needs to be connected to the pesticide tank 801 on the spraying vehicle via a pesticide delivery pipe, allowing various pesticides in the pesticide tank 801 to be delivered to the spray boom 2 through the pesticide delivery pipe and finally sprayed out from the nozzle.

[0050] The spraying device of this invention is arranged in front of the spraying vehicle via a connecting bracket. The liquid tank 801 is connected to the spray boom 2 via a liquid delivery pipe to begin spraying. The distance between adjacent spray booms 2 can be adjusted by the row spacing adjustment device to accommodate different row spacings. The distance between the nozzle and the ground is adjusted by adjusting the electric actuator 502, and the spraying angle and the distance between the nozzle and the ground are fine-tuned by rotating the connector 3, thus quickly adapting to spraying operations on plants with different row spacings and heights.

[0051] As can be seen, the spraying device provided by this utility model can achieve rapid and precise nozzle position adjustment, improving the overall efficiency of spraying operations. The nozzle position adjustment method is simple, reducing the complexity and labor intensity of manual operation. This spraying device can precisely control the spraying row spacing, ensuring uniform spray coverage, improving crop protection effects, reducing pesticide waste, and thus reducing spraying costs. This spraying device is also applicable to various types of spraying vehicles or sprayers, and can be flexibly adjusted according to different crops and planting conditions, improving the equipment's versatility and adaptability.

[0052] Furthermore, the high stability and precision of row spacing and height adjustment reduce the frequency and cost of equipment maintenance, while also lowering the failure rate caused by improper equipment adjustment. These advantages make the spraying device of this invention significantly superior in improving spraying efficiency and effectiveness, as well as reducing operational complexity and costs, thus contributing to the overall improvement of agricultural production.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] This document uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. Furthermore, those skilled in the art will recognize that, based on the ideas of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A spraying device with adjustable row spacing suitable for corn with wide and narrow rows, characterized in that, include: The spraying frame includes a spraying rack, a row spacing adjustment device, a spray bar, and a connecting bracket. The spraying rack comprises a top plate, a back plate, two side plates, and two motor mounting slots. The two side plates are located at opposite ends of the back plate and the top plate, respectively. The top plate, back plate, and side plates are perpendicularly connected to each other. The two motor mounting slots are respectively located inside the two side plates. The row spacing adjustment device is housed within the space enclosed by the top plate, back plate, and two side plates. The row spacing adjustment device includes two lead screws, two motors, and four sliders. The two motors are located in the two motor mounting slots. The two motors include a first motor and a second motor. The two motor mounting slots are the first motor mounting slot and the second motor mounting slot, respectively. The two lead screws include a first lead screw and a second lead screw. The four sliders include a first slider, a second slider, a third slider, and a fourth slider. The first motor is located in the first motor mounting slot. One end of the first lead screw is connected to the first motor via a first coupling. The first lead screw is connected to the side wall of the second motor mounting slot via a first bearing support. Both ends of the first lead screw have clockwise and counterclockwise threads respectively. A first slider and a second slider are respectively arranged on the clockwise and counterclockwise threads of the first lead screw. The second motor is located within the second motor mounting slot. One end of the second lead screw is connected to the side wall of the first motor mounting slot via a second bearing support. The other end of the second lead screw is connected to the second motor via a second coupling. The middle portion of the second lead screw has clockwise and counterclockwise threads respectively. A third slider and a fourth slider are respectively arranged on the clockwise and counterclockwise threads of the second lead screw. Each slider is connected to one end of a spray bar via a rotary connector, and the other end of the spray bar is equipped with a nozzle. One end of the connecting bracket is connected to the back plate of the spraying frame. The other end of the connecting bracket is connected to the spraying vehicle.

2. The adjustable row spacing spraying device for corn with wide and narrow rows according to claim 1, characterized in that, The thread lengths of the clockwise and counterclockwise threads are 40-80 cm.

3. The adjustable row spacing spraying device for corn with wide and narrow rows according to claim 1, characterized in that, The rotation angle of the rotary connector is 5°~30°.

4. The adjustable row spacing spraying device for corn with wide and narrow rows according to claim 1, characterized in that, The other end of the spray bar is also provided with a nozzle cover; the nozzle cover is arranged around the nozzle.

5. The adjustable row spacing spraying device for corn with wide and narrow rows according to claim 1, characterized in that, The connecting bracket includes a cross suspension, two bottom support rods, a support crossbar, an electric actuator, and four connecting slots; the two bottom support rods are a first bottom support rod and a second bottom support rod; the four connecting slots are a first connecting slot, a second connecting slot, a third connecting slot, and a fourth connecting slot; the first and second connecting slots are fixed to the back plate of the spraying rack; the third and fourth connecting slots are fixed to the front of the spraying vehicle; the cross suspension includes two crossbars, two vertical rods, and an X-shaped crossbar; the two crossbars are a first crossbar and a second crossbar; the two vertical rods are a first vertical rod and a second vertical rod; one end of the first vertical rod is connected to the upper end of the first connecting slot; the other end of the first vertical rod is connected to the upper end of the third connecting slot; the second vertical rod... One end of the rod is connected to the upper end of the second connecting groove; the other end of the second vertical rod is connected to the upper end of the fourth connecting groove; both the first horizontal rod and the second horizontal rod are located between the first vertical rod and the second vertical rod; an X-shaped crossbar is provided within the square space enclosed by the two horizontal rods and the two vertical rods; one end of the first bottom support rod is connected to the lower end of the first connecting groove; the other end of the first bottom support rod is connected to the lower end of the third connecting groove; one end of the second bottom support rod is connected to the lower end of the second connecting groove; the other end of the second bottom support rod is connected to the lower end of the fourth connecting groove; the supporting horizontal rod is located between the first bottom support rod and the second bottom support rod; one end of the electric actuator is connected to the middle position of the supporting horizontal rod; the other end of the electric actuator is connected to the front of the spraying vehicle.

6. The adjustable row spacing spraying device for corn with wide and narrow rows according to claim 5, characterized in that, The nozzle is 10-30cm above the ground.

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