A nutrient solution spraying device for urban greening plants

Abstract

The invention discloses a spraying device for applying nutrient solution to urban greening plants, and belongs to the technical field of drug spreading equipment. The invention comprises a drug spreading cart, a nutrient solution storage tank, a synchronous machine, a plurality of spraying mechanisms and a drug supply assembly, wherein the synchronous machine and the drug supply assembly are mounted on the drug spreading cart, and a plurality of the spraying mechanisms are mounted on the inner ring of the synchronous machine, and the drug supply assembly comprises a slide rail, wherein a drug supply hole is arranged in the slide rail, and the drug supply hole is connected to the nutrient solution storage tank through a pipeline, and a transmission pump is arranged in the middle of the pipeline, and the transmission pump is connected to a control system through a circuit, and a pair of synchronous toothed belts are arranged inside the synchronous machine, and each of the spraying mechanisms is connected to a pair of synchronous toothed belts, and a plurality of spraying mechanisms are used to achieve full coverage spraying of the green belt, and when the drug spreading cart does not stop, time is reserved for spraying sufficient plant nutrient solution, thereby achieving the effect of improving the spraying efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of pesticide spreading equipment, in particular to a spraying device for applying nutrient solution for urban greening plants. Background Art

[0002] Urban landscaping requires spraying devices in daily maintenance and beautification. Such nutrient solution spraying devices usually involve automated spraying systems, which are designed to effectively supply nutrient solution to urban plants to promote their growth and health. The spraying system should have good precision to ensure that each plant can obtain the right amount of nutrient solution, avoid waste and maximize the absorption efficiency of the plant. Spraying can be uniform atomization spraying or directional point-to-point spraying, depending on the type, size and growth needs of the plant. There must be a suitable liquid storage and supply system in the system to ensure that sufficient nutrient solution can be continuously provided to the plants during the spraying process.

[0003] The patent with publication number (CN218851321U) and name of a movable spraying device for plant nutrient solution solves the problem that the temperature in the water tank is low in winter, the plant nutrient solution will freeze and be difficult to spray. However, the spraying method has not been innovated. The plant nutrient solution is mainly sprayed on the main body of the plant, and only a small part enters the soil and reaches the roots of the plant. The plant receives very little nutrient solution, resulting in a large amount of nutrient solution waste and very low spraying efficiency. Summary of the invention

[0004] The object of the present invention is to provide a spraying device for applying nutrient solution to urban greening plants to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a nutrient solution spraying device for urban greening plants, comprising a spraying cart, a nutrient solution storage tank, a synchronous machine, a plurality of spraying mechanisms and a medicine supply component, wherein the synchronous machine and the medicine supply component are installed on the spraying cart, and a plurality of the spraying mechanisms are installed on the inner ring of the synchronous machine, and the medicine supply component comprises a slide rail, a medicine supply hole is arranged in the slide rail, and the medicine supply hole is connected to the nutrient solution storage tank through a pipeline, and a transmission pump is arranged in the middle of the pipeline, and the transmission pump is connected to a control system through a circuit.

[0006] Furthermore, a pair of synchronous toothed belts are arranged inside the synchronous machine, and an inner groove is opened on the inner ring of the synchronous machine at the position corresponding to the synchronous toothed belt. Each of the spraying mechanisms passes through the inner groove and is connected to a pair of synchronous toothed belts. A double-headed motor is installed on the top of the synchronous machine, and toothed belt pulleys are installed at both ends of the rotating shaft of the double-headed motor. The two toothed belt pulleys pass through the synchronous machine and mesh with the two synchronous toothed belts. The spraying cart moves along the urban green belt under the control of the control system, and the double-headed motor drives the two toothed belt pulleys to rotate, and the two toothed belt pulleys drive the two synchronous toothed belts to move simultaneously. The two synchronous toothed belts drive all the spraying mechanisms to circulate in the synchronous machine. Even if the spraying cart is moving forward, the spraying mechanism can remain stationary relative to a certain position in the green belt so as to spray enough plant nutrient solution. The spring telescopic part ensures that the spraying mechanism always keeps in contact with its inner ring when it circulates in the synchronous machine.

[0007] Furthermore, each of the spraying mechanisms includes a pair of spring telescopic parts, a fixed groove plate, a sliding plate, a flexible telescopic tube, an extraction tube and a clamping block. The pair of spring telescopic parts are arranged at the bottom of the fixed groove plate, and the pair of spring telescopic parts are respectively connected to two synchronous toothed belts. The sliding plate is slidably installed on the fixed groove plate, the extraction tube is arranged at one end of the fixed groove plate close to the medicine supply assembly, the flexible telescopic tube is connected between the hollow screw and the extraction tube, and the clamping block is installed at one end of the extraction tube away from the fixed groove plate.

[0008] Furthermore, each of the spraying mechanisms includes a fixing nut and a hollow screw, the fixing nut is installed on a fixed groove plate, triangular baffles are provided at both ends of the bottom of the sliding plate, the hollow screw is rotatably installed between the two triangular baffles, the hollow screw is threaded in the fixing nut, and a plurality of fine holes are also opened on the surface of the hollow screw.

[0009] Furthermore, each of the spraying mechanisms includes a driving gear, a driven gear, a servo motor and a side bevel gear. The driven gear is arranged at one end of the hollow screw, and the driven gear is coaxially arranged with the hollow screw. The servo motor is arranged above the sliding plate, and the driving gear and the side bevel gear are coaxially installed on the rotating shaft of the servo motor. The driving gear passes through the sliding plate and meshes with the driven gear for transmission.

[0010] Furthermore, each of the spraying mechanisms includes a pair of bush dial wheels, an upper gear, a lower gear, an upper combination wheel and a lower combination wheel. The pair of bush dial wheels are rotatably arranged at one end of the sliding plate away from the medicine supply component. The upper gear and the lower gear are respectively coaxially connected to the two bush dial wheels. The upper combination wheel and the lower combination wheel are both rotatably mounted on the sliding plate. The upper combination wheel and the lower combination wheel are both composed of a bevel gear and a cylindrical gear. The upper combination wheel is located at the upper end of the lower combination wheel. The cylindrical gear on the upper combination wheel is meshed with the upper gear, and the cylindrical gear on the lower combination wheel is meshed with the lower gear. The side bevel gear is meshed with the bevel gears in the upper combination wheel and the lower combination wheel.

[0011] When the spraying mechanism moves to the bottom of the synchronous machine, the control system controls the servo motor to work, the servo motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate, and the driven gear drives the hollow screw to rotate. Since the fixing nut is fixed on the fixed groove plate, the hollow screw extends outward while rotating. Since the hollow screw is installed on the sliding plate, the sliding plate also moves with the hollow screw, thereby ensuring that the driving gear and the driven gear are always meshed, and the flexible telescopic tube is stretched to ensure that the hollow screw is connected to the extraction tube;

[0012] The servo motor drives the side bevel gear to rotate, and the side bevel gear drives the upper combination wheel and the lower combination wheel to rotate. The side bevel gear makes the upper combination wheel and the lower combination wheel rotate in opposite directions, that is, the upper gear and the lower gear also rotate in opposite directions under the drive of the upper combination wheel and the lower combination wheel. The two shrub push wheels rotate in opposite directions to push the shrubs on the moving path of the sliding plate to both sides. The roots of the shrubs in the green belt are tough, so they can tilt to both sides to avoid blocking the movement of the sliding plate. After the sliding plate is fully extended, the hollow screw is close to the roots of the plants in the green belt, and the sprayed nutrient solution can directly act on the soil close to the roots, which is more easily absorbed by the plants, reducing the waste of nutrient solution and improving the efficiency of spraying.

[0013] Furthermore, a cross bar is provided inside the extraction tube, a through hole connected to the extraction tube is opened in the middle of the clamping block, a valve core is provided in the through hole, the valve core blocks the through hole, and a spring is provided between the valve core and the cross bar.

[0014] Furthermore, a groove is opened in the middle of the upper end of the slide rail, and a plurality of medicine outlet holes are connected between the medicine supply hole and the groove. A plurality of sealing blocks are slidably installed in the groove, and a spring is arranged between the bottom of the plurality of sealing blocks and the groove. Each of the sealing blocks blocks a medicine outlet hole, and the plurality of sealing blocks are arranged in contact with each other.

[0015] When the spraying mechanism moves to the bottom of the synchronous machine, the card block is connected to the slide rail. When the valve core contacts the sealing block, the valve core and the sealing block are against each other, the valve core moves upward to open the through hole of the card block, and the sealing block moves downward to open the medicine outlet hole. The transmission pump injects the nutrient solution in the nutrient solution storage tank into the medicine supply hole, and the nutrient solution enters the extraction tube from the medicine outlet hole. Finally, the nutrient solution is sprayed onto the green belt from several fine holes of the hollow screw. The valve core opens one sealing block each time, and the other sealing blocks and the card block seal the position of the opened medicine outlet hole to prevent leakage of the nutrient solution. After the sandblasting is completed, the servo motor retracts the sliding plate along the original path. After the card block leaves the slide rail, the valve core is reset to block the through hole.

[0016] Multiple spraying mechanisms are used to achieve full coverage of the green belt. Without stopping the spraying cart, time is left for spraying enough plant nutrient solution, thereby improving the spraying efficiency.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] The two shrub dial wheels rotate in opposite directions to push the shrubs on the moving path of the sliding plate to both sides. The roots of the shrubs in the green belt are tough, so they can tilt to both sides to avoid blocking the movement of the sliding plate. After the sliding plate is fully extended, the hollow screw is close to the roots of the plants in the green belt, and the sprayed nutrient solution can directly act on the soil close to the roots, which is more easily absorbed by the plants, reducing the waste of nutrient solution and improving the spraying efficiency. Through multiple spraying mechanisms, the green belt can be fully covered and sprayed. Without stopping the spraying cart, time is left for spraying enough plant nutrient solution, thereby achieving the effect of improving the spraying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 The overall appearance structure of the present invention is schematically shown Figure 1 ;

[0021] Figure 2 The overall appearance structure of the present invention is schematically shown Figure 2 ;

[0022] Figure 3 It is a schematic diagram of the internal structure of the synchronous machine of the present invention;

[0023] Figure 4 It is a schematic diagram of the connection structure between the spraying mechanism and the medicine supply assembly of the present invention;

[0024] Figure 5 The structure diagram of the spraying mechanism of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 6 The structure diagram of the spraying mechanism of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 7 It is a schematic diagram of the structure of the drug supply assembly of the present invention;

[0027] Figure 8 It is a schematic diagram of the internal structure of the drug supply assembly of the present invention;

[0028] In the figure: 1. Spraying cart; 2. Synchronous machine; 3. Double-headed motor; 4. Toothed pulley; 5. Synchronous toothed belt; 6. Spraying mechanism; 7. Medicine supply assembly; 8. Spring telescopic member; 9. Fixed slot plate; 10. Sliding plate; 11. Fixed nut; 12. Hollow screw; 13. Flexible telescopic tube; 14. Driving gear; 15. Driven gear; 16. Servo motor; 17. Shrub dial; 18. Upper gear; 19. Lower gear; 20. Upper combination wheel; 21. Lower combination wheel; 22. Side bevel gear; 23. Extraction tube; 24. Clamp block; 25. Valve core; 26. Slide rail; 27. Medicine supply hole; 28. Sealing block; 29. ​​Cross bar. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 8The present invention provides a technical solution: a nutrient solution spraying device for urban greening plants, comprising a spraying cart 1, a nutrient solution storage tank, a synchronous machine 2, a plurality of spraying mechanisms 6 and a medicine supply assembly 7, wherein the synchronous machine 2 and the medicine supply assembly 7 are mounted on the spraying cart 1, and the plurality of spraying mechanisms 6 are mounted on the inner ring of the synchronous machine 2, the medicine supply assembly 7 comprises a slide rail 26, a medicine supply hole 27 is arranged in the slide rail 26, the medicine supply hole 27 is connected to the nutrient solution storage tank through a pipeline, a transmission pump is arranged in the middle of the pipeline, and the transmission pump is connected to a control system through a circuit, a pair of synchronous toothed belts 5 are arranged inside the synchronous machine 2, an inner groove is opened at a position corresponding to the synchronous toothed belt 5 on the inner ring of the synchronous machine 2, and each spraying mechanism 6 is connected to a pair of synchronous toothed belts 5 through the inner groove, A double-headed motor 3 is installed above the synchronous machine 2, and toothed pulleys 4 are installed at both ends of the rotating shaft of the double-headed motor 3. The two toothed pulleys 4 pass through the synchronous machine 2 and mesh with two synchronous toothed belts 5. The spraying cart 1 moves along the urban green belt under the control of the control system. The double-headed motor 3 drives the two toothed pulleys 4 to rotate, and the two toothed pulleys 4 drive the two synchronous toothed belts 5 to move simultaneously. The two synchronous toothed belts 5 drive all the spraying mechanisms 6 to circulate in the synchronous machine 2. Even if the spraying cart 1 is moving forward, the spraying mechanism 6 can remain stationary relative to a certain position in the green belt so as to spray enough plant nutrient solution. The spring telescopic member 8 ensures that the spraying mechanism 6 always keeps in contact with its inner ring when it circulates in the synchronous machine 2.

[0031] Each spraying mechanism 6 includes a pair of spring telescopic parts 8, a fixed slot plate 9, a sliding plate 10, a flexible telescopic tube 13, an extraction tube 23 and a clamping block 24. The pair of spring telescopic parts 8 are arranged at the bottom of the fixed slot plate 9. The pair of spring telescopic parts 8 are respectively connected to the two synchronous toothed belts 5. The sliding plate 10 is slidably installed on the fixed slot plate 9. The extraction tube 23 is arranged at one end of the fixed slot plate 9 close to the medicine supply component 7. The flexible telescopic tube 13 is connected between the hollow screw 12 and the extraction tube 23. The clamping block 24 is installed at one end of the extraction tube 23 away from the fixed slot plate 9. Each spraying mechanism 6 includes a fixed nut 11 and a hollow screw 12. The fixed nut 11 is installed on the fixed slot plate 9. Triangular baffles are arranged at both ends of the bottom of the sliding plate 10. The hollow screw 12 is rotatably installed between the two triangular baffles. The hollow screw 12 is screwed in the fixed nut 11, and a plurality of fine holes are also opened on the surface of the hollow screw 12.

[0032] Each spraying mechanism 6 includes a driving gear 14, a driven gear 15, a servo motor 16 and a side bevel gear 22. The driven gear 15 is arranged at one end of the hollow screw 12, and the driven gear 15 is coaxially arranged with the hollow screw 12. The servo motor 16 is arranged above the sliding plate 10. The driving gear 14 and the side bevel gear 22 are coaxially mounted on the rotating shaft of the servo motor 16. The driving gear 14 penetrates the sliding plate 10 and meshes with the driven gear 15 for transmission. Each spraying mechanism 6 includes a pair of shrub dial wheels 17, an upper gear 18, a lower gear 19, an upper combination wheel 20 and a lower combination wheel 21. A pair of shrub dial wheels 17 The upper gear 18 and the lower gear 19 are coaxially connected with the two shrub wheels 17 respectively. The upper combination wheel 20 and the lower combination wheel 21 are both rotatably mounted on the sliding plate 10. The upper combination wheel 20 and the lower combination wheel 21 are both composed of a composite of a bevel gear and a cylindrical gear. The upper combination wheel 20 is located at the upper end of the lower combination wheel 21. The cylindrical gear on the upper combination wheel 20 is meshed with the upper gear 18, and the cylindrical gear on the lower combination wheel 21 is meshed with the lower gear 19. The side bevel gear 22 is meshed with the bevel gears in the upper combination wheel 20 and the lower combination wheel 21.

[0033] When the spraying mechanism 6 moves to the bottom of the synchronous machine 2, the control system controls the servo motor 16 to work, the servo motor 16 drives the driving gear 14 to rotate, the driving gear 14 drives the driven gear 15 to rotate, and the driven gear 15 drives the hollow screw 12 to rotate. Since the fixing nut 11 is fixed on the fixed groove plate 9, the hollow screw 12 extends outward while rotating. Since the hollow screw 12 is rotatably installed on the sliding plate 10, the sliding plate 10 also moves with the hollow screw 12, thereby ensuring that the driving gear 14 and the driven gear 15 are always in meshing, the flexible telescopic tube 13 is stretched to ensure that the hollow screw 12 is connected to the extraction tube 23, and the servo motor 16 drives the side bevel gear 22 to rotate, and the side bevel gear 2 2 drives the upper combination wheel 20 and the lower combination wheel 21 to rotate, and the side bevel gear 22 makes the upper combination wheel 20 and the lower combination wheel 21 rotate in opposite directions, that is, the upper gear 18 and the lower gear 19 are also driven by the upper combination wheel 20 and the lower combination wheel 21 to rotate in the opposite direction, and the two shrubs dialing wheels 17 rotate in the opposite direction to dial the shrubs on the moving path of the sliding plate 10 to both sides. The roots of the shrubs in the green belt are tough, so they can be tilted to both sides to avoid blocking the movement of the sliding plate 10. After the sliding plate 10 is fully extended, the hollow screw 12 is close to the roots of the plants in the green belt, and the sprayed nutrient solution can directly act on the soil close to the roots, which is more easily absorbed by the plants, reducing the waste of nutrient solution and improving the efficiency of spraying.

[0034] A cross bar 29 is provided inside the extraction tube 23, a through hole connected to the extraction tube 23 is provided in the middle of the clamping block 24, a valve core 25 is provided in the through hole, the valve core 25 blocks the through hole, a spring is provided between the valve core 25 and the cross bar 29, a groove is provided in the middle of the upper end of the slide rail 26, a plurality of medicine outlet holes are connected between the medicine supply hole 27 and the groove, a plurality of sealing blocks 28 are slidably installed in the groove, a spring is provided between the bottom of the plurality of sealing blocks 28 and the groove, each sealing block 28 blocks a medicine outlet hole, and the plurality of sealing blocks 28 are arranged in contact with each other, and when the spraying mechanism 6 moves to the bottom of the synchronous machine 2, the clamping block 24 is connected to the slide rail 26, and when the valve core 25 contacts the sealing block 28, the valve core 25 and the sealing block 28 are abutted, and the valve core 25 moves to The through hole of the clamping block 24 is opened by moving upward, and the sealing block 28 is moved downward to open the medicine outlet hole. The transmission pump injects the nutrient solution in the nutrient solution storage tank into the medicine supply hole 27, and the nutrient solution enters the extraction tube 23 from the medicine outlet hole. Finally, the nutrient solution is sprayed onto the green belt from the several fine holes of the hollow screw 12. The valve core 25 opens one sealing block 28 each time, and the other sealing blocks 28 and the clamping block 24 seal the position of the opened medicine outlet hole to prevent the nutrient solution from leaking. After the sandblasting is completed, the servo motor 16 retracts the sliding plate 10 along the original path. After the clamping block 24 leaves the slide rail 26, the valve core 25 is reset accordingly to block the through hole. The green belt is fully covered and sprayed through multiple spraying mechanisms 6. When the spraying cart 1 does not stop, time is left for spraying enough plant nutrient solution, thereby achieving the effect of improving the spraying efficiency.

[0035] The working principle of the present invention is as follows: the pesticide spraying cart 1 moves along the urban green belt under the control of the control system, the double-headed motor 3 drives the two toothed pulleys 4 to rotate, the two toothed pulleys 4 drive the two synchronous toothed belts 5 to move simultaneously, and the two synchronous toothed belts 5 drive all the spraying mechanisms 6 to circulate in the synchronous machine 2. Even if the pesticide spraying cart 1 is moving forward, the spraying mechanism 6 can remain stationary relative to a certain position in the green belt so as to spray enough plant nutrient solution. The spring telescopic member 8 ensures that the spraying mechanism 6 always keeps in contact with its inner circle when it circulates in the synchronous machine 2.

[0036] When the spraying mechanism 6 moves to the bottom of the synchronous machine 2, the control system controls the servo motor 16 to work, the servo motor 16 drives the driving gear 14 to rotate, the driving gear 14 drives the driven gear 15 to rotate, and the driven gear 15 drives the hollow screw 12 to rotate. Since the fixing nut 11 is fixed on the fixed groove plate 9, the hollow screw 12 extends outward while rotating. Since the hollow screw 12 is rotatably installed on the sliding plate 10, the sliding plate 10 also moves with the hollow screw 12, thereby ensuring that the driving gear 14 and the driven gear 15 are always in meshing, the flexible telescopic tube 13 is stretched to ensure that the hollow screw 12 is connected to the extraction tube 23, and the servo motor 16 drives the side bevel gear 22 to rotate, and the side bevel gear 2 2 drives the upper combination wheel 20 and the lower combination wheel 21 to rotate, and the side bevel gear 22 makes the upper combination wheel 20 and the lower combination wheel 21 rotate in opposite directions, that is, the upper gear 18 and the lower gear 19 are also driven by the upper combination wheel 20 and the lower combination wheel 21 to rotate in the opposite direction, and the two shrubs dialing wheels 17 rotate in the opposite direction to dial the shrubs on the moving path of the sliding plate 10 to both sides. The roots of the shrubs in the green belt are tough, so they can be tilted to both sides to avoid blocking the movement of the sliding plate 10. After the sliding plate 10 is fully extended, the hollow screw 12 is close to the roots of the plants in the green belt, and the sprayed nutrient solution can directly act on the soil close to the roots, which is more easily absorbed by the plants, reducing the waste of nutrient solution and improving the efficiency of spraying.

[0037] When the spraying mechanism 6 moves to the bottom of the synchronous machine 2, the clamping block 24 is connected to the slide rail 26. When the valve core 25 contacts the sealing block 28, the valve core 25 and the sealing block 28 are against each other, the valve core 25 moves upward to open the through hole of the clamping block 24, and the sealing block 28 moves downward to open the medicine outlet hole. The transmission pump injects the nutrient solution in the nutrient solution storage tank into the medicine supply hole 27, and the nutrient solution enters the extraction tube 23 from the medicine outlet hole. Finally, the nutrient solution is sprayed out from the several fine holes of the hollow screw 12 onto the green belt, and the valve core 25 Each time a sealing block 28 is opened, the other sealing blocks 28 and the clamping block 24 seal the position of the opened medicine outlet to prevent leakage of the nutrient solution. After the sandblasting is completed, the servo motor 16 retracts the sliding plate 10 to its original path. After the clamping block 24 leaves the slide rail 26, the valve core 25 is reset to block the through hole. Through multiple spraying mechanisms 6, the green belt is fully covered and sprayed. When the spraying cart 1 does not stop, time is left for spraying enough plant nutrient solution, thereby achieving the effect of improving the spraying efficiency.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A spraying device for applying nutrient solution to urban greening plants, characterized in that: The invention comprises a medicine spraying cart (1), a nutrient solution storage tank, a synchronous machine (2), a plurality of spraying mechanisms (6) and a medicine supply assembly (7), wherein the synchronous machine (2) and the medicine supply assembly (7) are mounted on the medicine spraying cart (1), the plurality of spraying mechanisms are mounted on the inner ring of the synchronous machine (2), the medicine supply assembly (7) comprises a slide rail (26), a medicine supply hole (27) is arranged in the slide rail (26), the medicine supply hole (27) is connected to the nutrient solution storage tank through a pipeline, a transmission pump is arranged in the middle of the pipeline, and the transmission pump is connected to a control system through a circuit; A pair of synchronous toothed belts (5) are arranged inside the synchronous machine (2); an inner groove is provided on the inner ring of the synchronous machine (2) at a position corresponding to the synchronous toothed belt (5); each of the spraying mechanisms passes through the inner groove and is connected to the pair of synchronous toothed belts (5); A groove is formed in the middle of the upper end of the slide rail (26); a plurality of medicine outlet holes are connected between the medicine supply hole (27) and the groove; and a plurality of sealing blocks (28) are slidably mounted in the groove; A spring is arranged between the bottom of the plurality of sealing blocks (28) and the groove, each of the sealing blocks (28) blocks a medicine outlet hole, and the plurality of sealing blocks (28) are arranged in contact with each other.

2. The urban greening plant nutrient solution application spraying device according to claim 1, characterized in that: A double-headed motor (3) is installed above the synchronous machine (2), and toothed belt wheels (4) are installed at both ends of the rotating shaft of the double-headed motor (3). The two toothed belt wheels (4) penetrate the synchronous machine (2) and mesh with two synchronous toothed belts (5).

3. A spraying device for applying nutrient solution for urban greening plants according to claim 2, characterized in that: Each of the spraying mechanisms (6) comprises a pair of spring telescopic members (8), a fixed slot plate (9), a sliding plate (10), a flexible telescopic tube (13), an extraction tube (23) and a clamping block (24); A pair of spring telescopic members (8) are arranged at the bottom of the fixed slot plate (9), and the pair of spring telescopic members (8) are respectively connected to two synchronous toothed belts (5). The sliding plate (10) is slidably mounted on the fixed slot plate (9). The extraction tube (23) is arranged at one end of the fixed slot plate (9) close to the medicine supply component (7). The flexible telescopic tube (13) is connected between the hollow screw (12) and the extraction tube (23). The clamping block (24) is mounted at one end of the extraction tube (23) away from the fixed slot plate (9).

4. The urban greening plant nutrient solution application spraying device according to claim 3, characterized in that: Each of the spraying mechanisms (6) comprises a fixing nut (11) and a hollow screw (12), wherein the fixing nut (11) is mounted on the fixing slot plate (9), triangular baffles are provided at both ends of the bottom of the sliding plate (10), and the hollow screw (12) is rotatably mounted between the two triangular baffles. The hollow screw (12) is screwed into the fixing nut (11), and a plurality of fine holes are provided on the surface of the hollow screw (12).

5. The urban greening plant nutrient solution application spraying device according to claim 4, characterized in that: Each of the spraying mechanisms (6) comprises a driving gear (14), a driven gear (15), a servo motor (16) and a side bevel gear (22); the driven gear (15) is arranged at one end of the hollow screw (12); the driven gear (15) and the hollow screw (12) are coaxially arranged; the servo motor (16) is arranged above the sliding plate (10); the driving gear (14) and the side bevel gear (22) are coaxially mounted on the rotating shaft of the servo motor (16); the driving gear (14) penetrates the sliding plate (10) and meshes with the driven gear (15) for transmission.

6. The urban greening plant nutrient solution application spraying device according to claim 5, characterized in that: Each of the spraying mechanisms (6) comprises a pair of bush dial wheels (17), an upper gear (18), a lower gear (19), an upper combination wheel (20) and a lower combination wheel (21); the pair of bush dial wheels (17) are rotatably arranged at one end of the sliding plate (10) away from the medicine supply assembly (7); the upper gear (18) and the lower gear (19) are respectively coaxially connected to the two bush dial wheels (17); The upper combination wheel (20) and the lower combination wheel (21) are both rotatably mounted on the sliding plate (10); the upper combination wheel (20) and the lower combination wheel (21) are both composed of a composite bevel gear and a cylindrical gear; the upper combination wheel (20) is located at the upper end of the lower combination wheel (21); the cylindrical gear on the upper combination wheel (20) is meshed and connected with the upper gear (18); the cylindrical gear on the lower combination wheel (21) is meshed and connected with the lower gear (19); and the side bevel gear (22) is meshed and connected with the bevel gears in the upper combination wheel (20) and the lower combination wheel (21).

7. The urban greening plant nutrient solution application spraying device according to claim 3, characterized in that: A cross bar (29) is arranged inside the extraction tube (23); a through hole communicating with the extraction tube (23) is opened in the middle of the clamping block (24); a valve core (25) is arranged in the through hole; the valve core (25) blocks the through hole; a spring is arranged between the valve core (25) and the cross bar (29).

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