Intelligent maintenance spraying device suitable for urban street trees

Abstract

The invention discloses an intelligent maintenance spraying device suitable for urban street trees, and relates to the technical field of street tree maintenance, the intelligent maintenance spraying device comprises a position finding assembly connected with a mobile vehicle body, and the mobile end of the position finding assembly is connected with a vertical beam; a top spraying assembly of a semicircular structure is horizontally and rotationally connected to the vertical beam, the top spraying assembly communicates with a bottom spraying assembly of a semicircular structure through a liquid guide pipe, the top spraying assembly is further connected with a middle spraying assembly of a semicircular structure through a lifting assembly, and the middle spraying assembly is connected with an external liquid injection pipe; a driving assembly is arranged on the vertical beam and connected with the bottom spraying assembly to drive the driving assembly, the bottom spraying assembly and the driving assembly to horizontally rotate along the trunk. The device can adapt to street trees of different specifications, three-layer synchronous spraying of tree crowns, trunks and tree roots is achieved, the whole area can be covered without dead corners, and the maintenance efficiency and quality are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of street tree maintenance, in particular to an intelligent maintenance spraying device suitable for urban street trees. BACKGROUND

[0002] In the urban greening system, street trees, as an important component, bear the key functions of purifying air, regulating climate, and beautifying the environment, and their healthy growth directly affects the quality of urban ecological environment and the living experience of residents. However, in the process of urban street tree maintenance, the tree species are diverse (such as plane trees, Japanese pagodatrees, camphor trees, etc.), and the specifications differ significantly (the diameter at breast height ranges from 5 cm to 30 cm, and the tree height ranges from 3 m to more than 10 m), which brings great challenges to the maintenance operation. Currently, street tree maintenance spraying operation mainly relies on manual operation combined with traditional spraying devices. In traditional spraying operation, the three key areas of crown, trunk, and root are usually not targeted for spraying, making it difficult to ensure uniform spraying in areas such as the top of the crown and around the roots, and easy to have maintenance dead angles; some traditional mechanical spraying devices are designed with fixed structures and cannot be flexibly adjusted according to the diameter at breast height and height of the trees, and have poor adaptability to different specifications of trees, for example, when targeting large-diameter trees, the spraying range is difficult to cover the circumference of the trunk, and when targeting high-crown trees, the effective spraying height cannot be reached, resulting in uneven maintenance effect. SUMMARY

[0003] The purpose of the present application is to solve the problems raised in the background art, and to provide an intelligent maintenance spraying device suitable for urban street trees.

[0004] The technical solution adopted by the present application to solve its technical problems is: An intelligent maintenance spraying device suitable for urban street trees, comprising a positioning assembly for connecting with a mobile vehicle body, a vertical beam connected to the mobile end of the positioning assembly; wherein the vertical beam is horizontally rotatably connected with a top spraying assembly in a semicircular structure to spray the crown area of the street tree; the top spraying assembly is connected with a bottom spraying assembly in a semicircular structure and parallel to the top spraying assembly through a vertically arranged liquid guide pipe to spray the root area of the street tree; the top spraying assembly is connected with a middle spraying assembly in a semicircular structure and parallel to the top spraying assembly and the bottom spraying assembly through a lifting assembly, and the middle spraying assembly is connected with the top spraying assembly and an external liquid injection pipe to spray the trunk area of the street tree; wherein the vertical beam is further provided with a driving assembly connected with the bottom spraying assembly to enable the top spraying assembly, the bottom spraying assembly, and the middle spraying assembly to perform horizontal rotary spraying action along the outside of the trunk of the street tree.

[0005] Furthermore, the above solution includes a horizontal telescopic cylinder for connecting to a mobile vehicle body. The horizontal telescopic cylinder is connected to a mounting frame. A positioning guide pipe and a positioning screw are vertically mounted on the mounting frame. One end of the positioning screw is connected to a positioning motor mounted on the mounting frame. A positioning slider is fitted on both the positioning screw and the positioning guide pipe. A vertical beam is mounted on the positioning slider.

[0006] Furthermore, the above solution includes a top spray assembly comprising a semi-circular groove connected to the positioning slider, a semi-circular slide rail slidably fitted within the groove, a semi-circular top spray pipe with closed ends mounted on the slide rail, and a plurality of upward-facing top spray nozzles mounted on the top spray pipe.

[0007] Furthermore, in the above scheme, several of the top nozzles are arranged in an umbrella shape.

[0008] Furthermore, the above-mentioned solution includes a bottom spray assembly comprising a bottom spray pipe connected to a liquid guide pipe and having a semi-circular structure, with both ends of the bottom spray pipe closed and several bottom spray heads with downward-facing nozzles disposed thereon.

[0009] Furthermore, the above solution includes a tubular nozzle.

[0010] Furthermore, the above solution includes a lifting motor mounted on the top spray pipe, a lifting screw connected to the lifting motor, the bottom end of the lifting screw being rotatably connected to the bottom spray pipe, a first lifting slider being fitted on the lifting screw, a second lifting slider being fitted on the first lifting slider, the second lifting slider being slidably fitted on the liquid guide pipe, and the middle spray component being positioned between the first lifting slider and the second lifting slider.

[0011] Furthermore, the above solution includes a central spray assembly comprising a rotating shaft and a rotating motor respectively mounted on the first and second lifting sliders. A central spray pipe with a semi-circular structure and closed ends is connected between the rotating shaft and the rotating motor, so that the central spray pipe can perform reciprocating deflection in the up and down direction during spraying. The central spray pipe is connected to the top spray pipe through a flexible hose and is connected to an external liquid injection pipe, and is provided with several central spray nozzles with inward-facing nozzles.

[0012] Furthermore, the deflection angle in the above scheme is 0-10°.

[0013] Furthermore, the above solution includes a drive motor mounted on a vertical beam. The drive motor is connected to a main gear, which is connected to a driven gear located outside the bottom nozzle and having a semi-circular structure. This allows the driven gear to rotate clockwise for a certain range and then reset, and then rotate counterclockwise for the same range, thus forming a circular path.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting a positioning component connected to a mobile vehicle body, the overall height of the device can be flexibly adjusted. Combined with the top spray component, bottom spray component and middle spray component with a semi-circular structure, it can be easily fitted onto the outside of the trunk of roadside trees with different diameters at breast height, effectively adapting to the diverse varieties of urban roadside trees and improving the versatility and applicability of the device. 2. The device innovatively constructs a three-layer spraying path of canopy (top spray) - trunk (middle spray) - roots (bottom irrigation). The maintenance liquid delivered by the external injection pipe can be synchronously transferred to the top spray and bottom spray components through the middle spray component, realizing synchronous spraying of the three key areas. This avoids the problem of uneven maintenance caused by the evaporation and loss of maintenance liquid in the step-by-step operation, ensuring that all parts of the tree can receive sufficient maintenance and significantly improving the maintenance effect. 3. Utilizing the drive components on the vertical beam, the top spray component, bottom spray component, and middle spray component can rotate horizontally along the outer side of the tree trunk. The semi-circular structure of the spray components ensures complete coverage of the tree's circumference during rotation, solving the problem of blind spots in maintenance such as the top of the canopy, the back of the trunk, and the edges of the roots caused by the fixed structure of traditional equipment. This ensures that each tree receives comprehensive and uniform maintenance, effectively reducing the incidence of tree diseases and pests and promoting healthy tree growth. 4. The middle spray component connects to the top spray component via a lifting mechanism, allowing it to flexibly adjust its height according to the height of the tree trunk, precisely targeting different areas of the trunk (such as the lower and middle parts). This avoids the shortcomings of traditional equipment, which has a fixed spray height and cannot provide targeted maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 A schematic diagram of the positioning component; Figure 3 for Figure 1 A magnified view of part A in the diagram; Figure 4 for Figure 1 A magnified view of part B in the diagram; The components include: 1. Positioning assembly; 11. Horizontal telescopic cylinder; 12. Mounting bracket; 13. Positioning guide pipe; 14. Positioning screw; 15. Positioning motor; 16. Positioning slider; 2. Vertical beam; 3. Top spray assembly; 31. Slide groove; 32. Slide rail; 33. Top spray pipe; 34. Top nozzle; 4. Guide pipe; 5. Bottom spray assembly; 51. Bottom spray pipe; 52. Bottom nozzle; 6. Lifting assembly; 61. Lifting motor; 62. Lifting screw; 63. First lifting slider; 64. Second lifting slider; 7. Center spray assembly; 71. Rotating shaft; 72. Rotating motor; 73. Center spray pipe; 74. Center nozzle; 75. Hose; 8. Drive assembly; 81. Drive motor; 82. Main gear; 83. Driven gear. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. The present invention will be further described with reference to the accompanying drawings and embodiments: A smart maintenance spraying device for urban street trees, including the following (see attached document). Figure 1 As shown, the system includes a positioning component 1 for connection to a mobile vehicle body, with a vertical beam 2 connected to the moving end of the positioning component 1. A semi-circular top spray component 3 is horizontally rotatably connected to the vertical beam 2 to spray the canopy area of ​​the roadside trees. A semi-circular bottom spray component 5, parallel to the top spray component 3, is connected to the top spray component 3 via a vertically arranged liquid guide pipe 4 to spray the root area of ​​the roadside trees. A semi-circular middle spray component 7, parallel to the top spray component 3 and the bottom spray component 5, is connected to the top spray component 3 via a lifting component 6. The middle spray component 7 is connected to the top spray component 3 and to an external liquid injection pipe to spray the trunk area of ​​the roadside trees. Additionally, a drive component 8 is provided on the vertical beam 2, connected to the bottom spray component 5, enabling the top spray component 3, bottom spray component 5, and middle spray component 7 to perform a horizontal rotating spraying action along the outside of the trunk of the roadside trees.

[0017] In the specific implementation process of this invention, the overall height of the device is first adjusted by the positioning component 1 connected to the mobile vehicle body. The top spray component 3, bottom spray component 5 and middle spray component 7, which are in a semi-circular structure, are then fitted together with the mobile vehicle body at the initial position outside the trunk of the roadside tree (the top spray component 3 is close to the crown). This adapts to urban roadside trees with different diameters at breast height and heights, solves the problem of adapting to the diverse varieties and specifications of roadside trees, and achieves the alignment of the device with the tree. After alignment, the external injection pipe delivers the maintenance liquid to the middle spray assembly 7, which then connects to the top spray assembly 3. Simultaneously, the top spray assembly 3 transmits the liquid to the bottom spray assembly 5 through the liquid guide pipe 4, forming a three-layer synchronous spraying path of "canopy (top spray) - trunk (middle spray) - roots (bottom irrigation)". In addition, the drive assembly 8 on the vertical beam 2 drives the bottom spray assembly 5 to move horizontally along the outside of the trunk, thereby driving the top spray assembly 3 and the middle spray assembly 7 to rotate horizontally along the outside of the trunk. The height of the middle spray assembly 7 can be adjusted to correspond to the trunk via the lifting assembly 6. The three form a semi-circular spraying structure that surrounds the trunk. The drive assembly 8 can drive this structure to rotate horizontally around the trunk, which can cover the entire area of ​​the tree. The spraying range of the semi-circular structure covers the entire circumference of the tree, ensuring that there are no blind spots in maintenance.

[0018] For the above scheme, please refer to the appendix for details. Figure 1 and attached Figure 2As shown, the positioning assembly 1 includes a horizontal telescopic cylinder 11 for connecting to the moving vehicle body. The horizontal telescopic cylinder 11 is connected to a mounting bracket 12. A positioning guide pipe 4 and a positioning screw 14 are vertically mounted on the mounting bracket 12. One end of the positioning screw 14 is connected to a positioning motor 15 mounted on the mounting bracket 12. A positioning slider 16 is fitted on both the positioning screw 14 and the positioning guide pipe 4. A vertical beam 2 is mounted on the positioning slider 16.

[0019] In this scheme, the horizontal telescopic cylinder 11, which is directly connected to the mobile vehicle, first pushes the mounting frame 12 to extend and retract horizontally, adjusting the horizontal distance between the top spray assembly 3, the bottom spray assembly 5, and the middle spray assembly 7 and the main trunk, ensuring that the semi-circular structure can be smoothly fitted into the outer perimeter of the main trunk. Then, the positioning motor 15 on the mounting frame 12 is started, driving the positioning screw 14 to rotate. Since the positioning slider 16 cooperates with the positioning screw 14 and the positioning liquid guide pipe 4 at the same time, the rotational motion of the positioning screw 14 is converted into the smooth lifting and lowering of the slider in the vertical direction, which in turn drives the vertical beam 2 connected to the slider and the entire spraying assembly to lift and lower synchronously, finally adjusting the top spray assembly 3, the bottom spray assembly 5, and the middle spray assembly 7 to the appropriate position, completing the all-round alignment of the device with the tree.

[0020] For the above scheme, please refer to the appendix for details. Figure 1 and attached Figure 3 As shown, the top spray assembly 3 includes a semi-circular groove 31 connected to the positioning slider 16. A semi-circular slide rail 32 is slidably fitted inside the groove 31. A semi-circular top spray pipe 33 with closed ends is provided on the slide rail 32. Several top spray nozzles 34 with upward-facing nozzles are provided on the top spray pipe 33, and the several top spray nozzles 34 are arranged in an umbrella shape.

[0021] In this design, the top spray pipe 33 is connected to the external injection pipe via the middle spray assembly 7. The maintenance liquid enters the top spray pipe 33, which has a semi-circular structure and is closed at both ends, through the middle spray assembly 7, and is sprayed out from several top spray nozzles 34 arranged on the pipe body. At the same time, the top spray pipe 33 is fixed on the semi-circular slide rail 32. The slide rail 32 and the semi-circular slide groove 31 connected to the vertical beam 2 slide together and can be driven by the drive assembly 8 to rotate horizontally along the trunk. With the upward orientation of the top spray nozzles 34 and the umbrella-shaped arrangement, the sprayed liquid can evenly cover the bottom and side areas of the tree canopy. In addition, as the top spray pipe 33 moves downward, the distance between the top spray nozzles 34 and the tree canopy increases, which gradually increases the spraying range, realizes targeted maintenance of the tree canopy, avoids the liquid from spreading indiscriminately in all directions, and improves the efficiency of tree canopy maintenance.

[0022] For the above scheme, please refer to the appendix for details. Figure 1 and attached Figure 4As shown, the bottom spray assembly 5 includes a bottom spray pipe 51 connected to the liquid guide pipe 4 and having a semi-circular structure. The bottom spray pipe 51 is closed at both ends and has several bottom spray heads 52 with downward-facing nozzles. The bottom spray heads 52 have a tubular structure, allowing the liquid to penetrate deep into the soil.

[0023] In this design, the bottom spray pipe 51 is connected to the top spray assembly 3 via a vertical liquid guide pipe 4. The maintenance liquid is diverted from the top spray assembly 3 to the liquid guide pipe 4 and then enters the bottom spray pipe 51, which has a semi-circular structure. Since the bottom nozzle 52 on the bottom spray pipe 51 is set with its nozzle facing downward and has a tubular structure, the maintenance liquid can directly act on the soil around the roots of the roadside trees after being sprayed from the bottom nozzle 52. This allows the maintenance liquid to penetrate deeply into the root absorption area, achieving directional spraying and maintenance of the tree roots. Combined with the overall rotation action, it can achieve spraying around the tree roots without dead angles.

[0024] For the above scheme, please refer to the appendix for details. Figure 1 and attached Figure 4 As shown, the lifting assembly 6 includes a lifting motor 61 mounted on the top spray pipe 33, a lifting screw 62 connected to the lifting motor 61, the bottom end of the lifting screw 62 being rotatably connected to the bottom spray pipe 51, and a first lifting slider 63 cooperating on the lifting screw 62, a second lifting slider 64 cooperating with the first lifting slider 63, the second lifting slider 64 being slidably fitted on the liquid guide pipe 4, and the middle spray assembly 7 being disposed between the first lifting slider 63 and the second lifting slider 64.

[0025] In this design, after the lifting motor 61 starts, it drives the connected lifting screw 62 to rotate. Since the bottom end of the lifting screw 62 is rotatably connected to the bottom spray pipe 51, and the screw is equipped with a first lifting slider 63, the rotational motion of the screw is converted into the vertical lifting and lowering of the first lifting slider 63 along the screw. At the same time, the second lifting slider 64, which is equipped with the first lifting slider 63, slides along the liquid guide pipe 4 (the liquid guide pipe 4 provides a limiting function). Together, they drive the intermediate spray assembly 7 set between them to lift and lower synchronously, ultimately realizing the flexible adjustment of the height of the intermediate spray assembly 7 between the top spray assembly 3 and the bottom irrigation assembly to adapt to the maintenance needs of the main trunk area of ​​the roadside trees.

[0026] For the above scheme, please refer to the appendix for details. Figure 1 and attached Figure 3 As shown, the central spray assembly 7 includes a rotating shaft 71 and a rotating motor 72 respectively disposed on the first lifting slider 63 and the second lifting slider 64. A central spray pipe 73 with a semi-circular structure and closed at both ends is connected between the rotating shaft 71 and the rotating motor 72 so that the central spray pipe 73 can perform a reciprocating deflection action in the up and down direction during the spraying process, and the deflection angle is 0-10°. The central spray pipe 73 is connected to the top spray pipe 33 through a hose 75 and is connected to an external liquid injection pipe, and a number of central spray nozzles 74 with the nozzles facing inward are provided on it.

[0027] In this design, the maintenance solution is introduced through an external injection pipe, and simultaneously connected to the top spray pipe 33 and the middle spray pipe 73 via a flexible hose 75, achieving dual-path liquid supply (ensuring independent and stable liquid supply to the middle spray component 7 while also linking with the top spray component 3). After entering the semi-circular middle spray pipe 73, which is closed at both ends, the liquid is sprayed out from several nozzles 74 arranged inward on the pipe body, directly acting on the main trunk area of ​​the roadside trees. At the same time, the two ends of the middle spray pipe 73 are respectively connected to the rotating shaft 71 of the first lifting slider 63 and the rotating motor 72 of the second lifting slider 64. Starting the rotating motor 72 can drive the middle spray pipe 73 to reciprocate up and down around the rotating shaft 71 (deflection angle 0-10°), expanding the spraying range without changing the overall position of the middle spray pipe 73. In addition, the up and down reciprocating deflection can adapt to the cylindrical curved surface and uneven texture of the trunk, making up for coverage blind spots and ensuring that the liquid is evenly attached to the trunk surface. Furthermore, in conjunction with its horizontal rotation and lifting component 6, it can achieve large-area coverage of the trunk area.

[0028] For the above scheme, please refer to the appendix for details. Figure 1 and attached Figure 3 As shown, the drive assembly 8 includes a drive motor 81 mounted on the vertical beam 2. The drive motor 81 is connected to a main gear 82. The main gear 82 is connected to a driven gear 83 mounted outside the bottom nozzle 51 and having a semi-circular structure. The driven gear 83 rotates clockwise for a certain range and then resets, and then rotates counterclockwise for the same range, so that the driven gear 83 rotates to form a circular path.

[0029] In this design, a drive motor 81 provides power, driving the connected main gear 82 to rotate. The main gear 82 meshes with a semi-circular structure on the outside of the bottom spray pipe 51, transmitting power to the driven gear 83. Under drive, the driven gear 83 first rotates clockwise for a certain range and then resets, then rotates counterclockwise for the same range, thereby driving the bottom spray pipe 51 connected to the driven gear 83, as well as the top spray assembly 3 and the middle spray assembly 7 connected through the liquid guide pipe 4 and the lifting assembly 6, to rotate synchronously, achieving overall circumferential coverage spraying of the trees. Furthermore, because its reciprocating rotation path can cover the circular area around the trunk, it avoids the problem of pipe entanglement caused by full-circle rotation. The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from the spirit and scope of the invention, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent maintenance spraying device suitable for urban street trees, characterized in that: Includes a positioning component (1) for connecting to a mobile vehicle body, with a vertical beam (2) connected to the moving end of the positioning component (1); Among them, the vertical beam (2) is horizontally rotatably connected to the top spray assembly (3) with a semi-circular structure, so as to spray the canopy area of ​​the roadside trees; Among them, the top spray assembly (3) is connected to the bottom spray assembly (5) which has a semi-circular structure and is arranged parallel to the top spray assembly (3) through a vertically arranged liquid guide pipe (4) to spray the root area of ​​the roadside trees; Among them, the top spray assembly (3) is connected to the middle spray assembly (7) which has a semi-circular structure and is arranged in parallel between the top spray assembly (3) and the bottom spray assembly (5) via the lifting assembly (6). The middle spray assembly (7) is connected to the top spray assembly (3) and connected to the external injection pipe to spray the main trunk area of ​​the roadside tree. Among them, the vertical beam (2) is also equipped with a drive component (8), which is connected to the bottom spray component (5) so that the top spray component (3), the bottom spray component (5) and the middle spray component (7) can perform horizontal rotation spraying along the outside of the main trunk of the roadside tree.

2. The intelligent maintenance spraying device for urban street trees according to claim 1, characterized in that: The positioning component (1) includes a horizontal telescopic cylinder (11) for connection with the moving vehicle body. Among them, the horizontal telescopic cylinder (11) is connected to the mounting frame (12), and the mounting frame (12) is vertically mounted with the positioning guide pipe (13) and the positioning screw (14). One end of the positioning screw (14) is connected to the positioning motor (15) set on the mounting frame (12), and the positioning screw (14) and the positioning guide pipe (13) are both equipped with positioning sliders (16). The vertical beam (2) is set on the positioning slider (16).

3. The intelligent maintenance spraying device for urban street trees according to claim 2, characterized in that: The top spray assembly (3) includes a groove (31) that is connected to the positioning slider (16) and has a semi-circular structure. The slide groove (31) is fitted with a slide rail (32) with a semi-circular structure. The slide rail (32) is provided with a top spray pipe (33) with a semi-circular structure and closed at both ends. The top spray pipe (33) is provided with several top spray heads (34) with the nozzles facing upwards.

4. The intelligent maintenance spraying device for urban street trees according to claim 3, characterized in that: Several of the top nozzles (34) are arranged in an umbrella shape.

5. The intelligent maintenance spraying device for urban street trees according to claim 4, characterized in that: The bottom spray assembly (5) includes a bottom spray pipe (51) that is connected to the liquid guide pipe (4) and has a semi-circular structure. The bottom spray pipe (51) is closed at both ends and has several bottom spray heads (52) with the nozzles facing downwards.

6. The intelligent maintenance spraying device for urban street trees according to claim 5, characterized in that: The bottom nozzle (52) has a tubular structure.

7. The intelligent maintenance spraying device for urban street trees according to claim 6, characterized in that: The lifting assembly (6) includes a lifting motor (61) mounted on the top spray pipe (33), the lifting motor (61) is connected to a lifting screw (62), the bottom end of the lifting screw (62) is rotatably connected to the bottom spray pipe (51), and a first lifting slider (63) is fitted on the lifting screw (62), the first lifting slider (63) is fitted with a second lifting slider (64), the second lifting slider (64) is slidably fitted on the liquid guide pipe (4), and the middle spray assembly (7) is located between the first lifting slider (63) and the second lifting slider (64).

8. The intelligent maintenance spraying device for urban street trees according to claim 7, characterized in that: The intermediate spray assembly (7) includes a rotating shaft (71) and a rotating motor (72) respectively disposed on the first lifting slider (63) and the second lifting slider (64). A semi-circular intermediate spray pipe (73) with closed ends is connected between the rotating shaft (71) and the rotating motor (72) so that the intermediate spray pipe (73) can perform reciprocating deflection in the up and down direction during the spraying process. The intermediate spray pipe (73) is connected to the top spray pipe (33) through a hose (75) and connected to the external liquid injection pipe, and is provided with several intermediate spray nozzles (74) with the nozzles facing inward.

9. The intelligent maintenance spraying device for urban street trees according to claim 8, characterized in that: The deflection angle is 0-10°.

10. The intelligent maintenance spraying device for urban street trees according to claim 9, characterized in that: The drive assembly (8) includes a drive motor (81) mounted on the vertical beam (2). The drive motor (81) is connected to a main gear (82). The main gear (82) is connected to a secondary gear (83) mounted outside the bottom nozzle (51) and having a semi-circular structure. The secondary gear (83) rotates clockwise for a certain range and then resets, and then rotates counterclockwise for the same range, so that the secondary gear (83) rotates to form a circular path.

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