Shrub irrigation machine

By designing a shrub irrigation machine including a water storage tank, a filter can and a adjustment seat, the problem of inconvenient filtering of the medicine residue and adjusting the water spray position in the prior art is solved, and a more efficient irrigation effect is achieved.

CN222583000UActive Publication Date: 2025-03-11SICHUAN HONGCHENG YULEI CONSTR CO LTD
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Patent Information

Application Number
CN202420427687.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-06
Publication Date
2025-03-11
Estimated Expiration
2034-03-06

AI Technical Summary

Technical Problem

The existing irrigation device is not convenient for filtering the residues left by the mixed and stirred potion, and is not convenient for adjusting the position of the water spray according to the height and width of the vegetation.

Method used

A shrub irrigation machine was designed, including a water storage tank, a water pump, a filter can, a sprinkler pipe and a control seat. After the water is pumped through the water pump, the filter can be filtered, the diversion pipe is diverted, the hose and conduit are transported to the sprinkler pipe, and the piston and nozzle are sprayed. The hydraulic cylinder and adjusting seat can adjust the nozzle height, and the screw and gear adjust the extension length of the sprinkler tube.

Benefits of technology

The filtration of the drug residue is achieved, and the position of the spraying water is adjusted according to the height and width of the shrub is improved, which improves the applicability and efficiency of irrigation.

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Abstract

The utility model belongs to the technical field of irrigation, and particularly relates to a shrub irrigation machine which comprises a base. The water outlet end of the water pump is fixedly connected to one side of the upper end of the filtering tank, the water outlet side of the filtering tank is fixedly connected with a flow dividing pipe, supporting columns are fixedly installed on the two sides of the other end of the base, sliding holes are formed in the upper ends of the supporting columns, limiting rods are slidably installed in the sliding holes, and adjusting bases are fixedly installed at the top ends of the limiting rods. Sliding rails are welded to the upper portions of the two sides of the adjusting base, a sliding table is slidably installed on the sliding rails, a sprinkling irrigation pipe is fixedly installed on the sliding table, a plurality of nozzles are installed at the bottom of the sprinkling irrigation pipe side by side, guide pipes are fixedly installed on the different sides of the two ends of the adjusting base respectively, pistons are fixedly installed at the front ends of the guide pipes, and water passing holes are formed in one ends of the pistons. The other end of the guide pipe is fixedly connected with a hose, and the hose is fixedly connected to the two sides of the two ends of the flow dividing pipe respectively. Through the arrangement, irrigation can be carried out according to shrubs in different height and width ranges.
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Description

Technical Field

[0001] The utility model relates to the technical field of irrigation, in particular to a shrub irrigation machine. Background Art

[0002] The shrub irrigation machine is a device specially used for irrigating shrubs. It can automatically irrigate according to the water needs of the shrubs to ensure that the shrubs get enough water to keep them healthy and lush.

[0003] The working principle of the shrub irrigation machine is to automate the irrigation process by adjusting the water source and the working mode of the sprinkler or dripper according to the water needs of the shrubs and environmental conditions, so as to ensure that the shrubs get the right amount of water and nutrients to promote their healthy growth.

[0004] The existing irrigation device is not convenient for filtering the residual medicine residues in the mixed and stirred medicine solution, and is also not convenient for adjusting the water spraying position according to the height and width of the vegetation; therefore, a shrub irrigation machine is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of the prior art, the existing irrigation device is not convenient for filtering the residual medicine residues of the mixed and stirred medicine solution, and is not convenient for adjusting the water spraying position according to the height and width of the vegetation. The utility model proposes a shrub irrigation machine.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a shrub irrigation machine described in the utility model comprises a base; a handle is fixedly installed on one side of the base, a water tank is fixedly installed on one end of the upper part of the base, a water inlet is opened on one end of the upper part of the water tank, a feed inlet is opened in the center of the top of the water tank, a water outlet is opened in the center of the bottom of the water tank, a connecting pipe is fixedly installed on the water outlet, a mounting seat is provided on one side of the water tank, a water pump is fixedly installed on the mounting seat, the other end of the connecting pipe is fixedly connected to the water inlet end of the water pump, a filter tank is provided on one side of the water pump and fixedly installed on the base, the water outlet end of the water pump is fixedly connected to one side of the upper end of the filter tank, the water outlet side of the filter tank is fixedly connected to a shunt pipe, pillars are fixedly installed on both sides of the other end of the base, and the pillars A sliding hole is opened at the end, and a limit rod is slidably installed in the sliding hole. An adjusting seat is fixedly installed on the top of the limit rod. Slide rails are welded on the upper parts of both sides of the adjusting seat, and a slide platform is slidably installed on the slide rails. A sprinkler pipe is fixedly installed on the slide platform, and a plurality of nozzles are installed side by side at the bottom of the sprinkler pipe. Conduits are fixedly installed on different sides of the two ends of the adjusting seat, and a piston is fixedly installed at the front end of the conduit. A water hole is opened at one end of the piston, and a hose is fixedly connected to the other end of the conduit. The hoses are respectively fixedly connected to both sides of the two ends of the diversion pipe. Support columns are fixedly installed at the four corners of the bottom of the base, and a support is rotatably installed in the support column. A roller is rotatably installed in the support through a rotating shaft. The spraying width of the sprinkler pipe can be adjusted by setting a piston and a guide rod. A handle and a support are set to facilitate the steering of the irrigation machine.

[0007] Preferably, a stirring shaft is horizontally arranged in the water tank, and both ends of the stirring shaft are rotatably installed in the water tank through bearings. One end of the stirring shaft passes through the tank body on one side of the water tank and is fixedly installed with a rotating wheel. A rotating motor is arranged on the lower side of the water tank and is fixedly installed on a base. A transmission wheel is fixedly installed on the front end of the rotating shaft of the rotating motor. The rotating wheel and the transmission wheel rotate in coordination through a belt. The stirring shaft is arranged to fully blend the fertilizer and water when fertilizing shrubs.

[0008] Preferably, a plurality of stirring rods are fixedly installed in parallel on both sides of the stirring shaft, and scrapers are fixedly installed at the front ends of the stirring rods on both sides of the stirring shaft. The scrapers are arranged to scrape impurities and fertilizer residues in the water from the inner wall of the water storage tank while stirring, so as to clean the water storage tank.

[0009] Preferably, a hanging platform is provided at the upper end of the filter tank, a filter cartridge is fixedly installed on the upper part of the hanging platform, and a tank cover is fixedly installed on the top of the filter tank. The filter tank is arranged to filter impurities and fertilizer residues in water to prevent impurities and fertilizer residues from clogging the nozzle and affecting the spraying effect.

[0010] Preferably, a support plate is fixedly installed on the upper end of the pillar, a hydraulic cylinder is fixedly installed in the center of the upper part of the support plate, the front end of the hydraulic rod of the hydraulic cylinder is fixedly installed in the center of the bottom of the adjustment seat, and the hydraulic cylinder is arranged to adjust the nozzle height to irrigate shrubs of different heights.

[0011] Preferably, screw rods are provided on both sides of the adjusting seat, and the threads on the two screw rods are in opposite directions. Both ends of the screw rods are rotatably installed in the adjusting seat through bearings. A threaded hole is opened on one side of the slide, and the slide is slidably installed on the screw rods through the threaded hole. The same end of the screw rod passes through the adjusting seat and is fixedly installed with gears. The two gears are meshed with each other. An electric motor is fixedly installed on one side of the other end of the adjusting seat, and the rotating shaft of the motor is fixedly connected to one end of the screw rod. The screw rod is provided to adjust the extension length of the sprinkler pipe.

[0012] The utility model is beneficial in that:

[0013] 1. The utility model starts the water pump to extract water from the water storage tank when irrigating the shrubs, filters it through the filter tank, and then enters the diversion pipe for diversion, respectively enters the hose, and enters the conduit through the hose, starts the motor to drive the screw rod to rotate, and drives the slide to slide on the slide rail under the cooperation of the thread in the threaded hole. At the same time, under the action of the gear, the two screw rods rotate at the same time, and the two slides respectively drive the two sprinkler pipes to move to both sides. The sprinkler pipe extends out of the base, and the conduit slides in the sprinkler pipe. The water hole on the piston injects water into the sprinkler pipe, and the shrubs on both sides are irrigated through the nozzle at the front end of the piston. The hydraulic cylinder is started to push the adjustment seat to rise and fall, and the nozzle is driven to rise and fall at the same time. The structural design of irrigating shrubs of different heights realizes the function of filtering and adjusting the height and width of the irrigation device, solves the problem that the existing irrigation device is not convenient for filtering the residual medicine residue of the mixed and stirred medicine solution, and is not convenient for adjusting the position of the water spray according to the height and width of the vegetation, and improves the applicability of the irrigation machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 A schematic diagram of the structure viewed from one side;

[0016] Figure 2 It is a schematic diagram of the side structure;

[0017] Figure 3 This is a schematic diagram of the internal structure of the water storage tank;

[0018] Figure 4 This is a schematic diagram of the internal structure of the filter tank;

[0019] Figure 5 Schematic diagram of the internal structure of the sprinkler pipe.

[0020] In the figure: 1. base; 2. water storage tank; 3. feed port; 4. water inlet; 5. stirring shaft; 6. stirring rod; 7. scraper; 8. connecting pipe; 9. rotating wheel; 10. belt; 11. transmission wheel; 12. rotating motor; 13. water pump; 14. filter tank; 15. filter cartridge; 16. tank cover; 17. diverter pipe; 18. hose; 19. pillar; 20. limit rod; 21. support plate; 22. hydraulic cylinder; 23. adjustment seat; 24. motor; 25. screw; 26. gear; 27. slide; 28. guide tube; 29. ​​piston; 30. sprinkler pipe; 31. nozzle; 32. support column; 33. support; 34. roller; 35. handle. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5As shown, a shrub irrigation machine comprises a base 1; a handle 35 is fixedly installed on one side of the base 1, a water storage tank 2 is fixedly installed on one end of the upper part of the base 1, a water inlet 4 is opened on one end of the upper part of the water storage tank 2, a feed inlet 3 is opened in the center of the top of the water storage tank 2, a water outlet is opened in the center of the bottom of the water storage tank 2, a connecting pipe 8 is fixedly installed on the water outlet, a mounting seat is provided on one side of the water storage tank 2, a water pump 13 is fixedly installed on the mounting seat, the other end of the connecting pipe 8 is fixedly connected to the water inlet end of the water pump 13, a filter tank 14 is provided on one side of the water pump 13 and is fixedly installed on the base 1, the water outlet end of the water pump 13 is fixedly connected to one side of the upper end of the filter tank 14, and the water outlet side of the filter tank 14 is fixedly connected to the upper end of the filter tank 14. A shunt pipe 17 is fixedly connected, and pillars 19 are fixedly installed on both sides of the other end of the base 1. A sliding hole is opened at the upper end of the pillar 19, and a limit rod 20 is slidably installed in the sliding hole. An adjustment seat 23 is fixedly installed on the top of the limit rod 20. Slide rails are welded on the upper parts of both sides of the adjustment seat 23, and a slide table 27 is slidably installed on the slide rail. A sprinkler pipe 30 is fixedly installed on the slide table 27, and a plurality of nozzles 31 are installed side by side at the bottom of the sprinkler pipe 30. Conduits 28 are fixedly installed on different sides of the two ends of the adjustment seat 23, and a piston 29 is fixedly installed on the front end of the conduit 28. A water hole is opened at one end of the piston 29, and a hose 18 is fixedly connected to the other end of the conduit 28. The pipes 18 are respectively fixedly connected to the two sides of the two ends of the shunt pipe 17, and the four corners of the bottom of the base 1 are fixedly installed with support columns 32, and a support 33 is rotatably installed in the support column 32, and a roller 34 is rotatably installed in the support 33 through a rotating shaft; when working, the existing irrigation device is not convenient for filtering the residual medicine residues of the mixed and stirred medicine solution, and it is not convenient to adjust the position of the water spray according to the height and width of the vegetation. When irrigating shrubs, the water pump 13 extracts the mixture of fertilizer and water in the water storage tank 2, pumps it into the filter tank 14, and filters it. The filtered liquid enters the shunt pipe 17 through the lower end of the filter tank 14, and is shunted to the hoses 18 on both sides, and enters the two conduits 28 respectively. The liquid enters the sprinkler pipe 30 through the piston 29, and the motor 24 is started. The motor 24 drives the screw rod 25 to rotate. Under the interaction of the gear 26 at the other end of the screw rod 25, the two screw rods 25 rotate at the same time, driving the two slides 27 to slide in the opposite direction, pushing the sprinkler pipe 30 to extend toward the adjustment seat 23. At the same time, the conduit 28 and the piston 29 slide in the sprinkler pipe 30, and the liquid sprays the shrubs through the nozzle 31 at the front end of the piston 29. The base 1 is pushed by the handle 35, and the base 1 rotates the roller 34 through the support column 32 and the support 33 to drive the irrigation machine to move. When turning, the handle 35 is applied to one side to rotate the support 33 to control the base 1 to turn, and the shrubs continue to be irrigated.

[0023] A stirring shaft 5 is horizontally arranged in the water tank 2, and both ends of the stirring shaft 5 are rotatably installed in the water tank 2 through bearings. One end of the stirring shaft 5 passes through the tank body of one side of the water tank 2, and a rotating wheel 9 is fixedly installed. A rotating motor 12 is arranged on one side below the water tank 2 and is fixedly installed on the base 1. A transmission wheel 11 is fixedly installed on the front end of the rotating shaft of the rotating motor 12, and the rotating wheel 9 and the transmission wheel 11 rotate in coordination through a belt 10. During operation, when irrigating and fertilizing shrubs, fertilizer is put into the water tank 2 through the feed port 3, and the rotating motor 12 is started. The rotating shaft of the rotating motor 12 drives the transmission wheel 11 to rotate, and drives the rotating wheel 9 to rotate with the cooperation of the belt 10, and the rotating wheel 9 drives the stirring shaft 5 to rotate to mix the fertilizer and water.

[0024] A plurality of stirring rods 6 are fixedly installed in parallel on both sides of the stirring shaft 5, and a scraper 7 is fixedly installed at the front end of the stirring rods 6 on both sides of the stirring shaft 5; during operation, when the fertilizer and water are stirred, the stirring shaft 5 rotates to drive the stirring rods 6 to rotate, and the stirring rods 6 drive the scraper 7 to rotate. While the scraper 7 rotates, one side of the scraper 7 is always tangent to the inner wall of the water storage tank 2 to scrape off impurities and fertilizer residues on the inner wall, thereby automatically cleaning the inside of the water storage tank 2.

[0025] A hanging platform is provided at the upper end of the filter tank 14, a filter cartridge 15 is fixedly installed on the upper part of the hanging platform, and a tank cover 16 is fixedly installed on the top of the filter tank 14; when working, when irrigating shrubs, the water pump 13 extracts the mixture of fertilizer and water in the water storage tank 2 and pumps it into the filter tank 14, and the fertilizer and water mixture enters the filter tank 14 and falls into the filter cartridge 15 for filtration, and the mixed impurities therein are filtered in the filter cartridge 15, and the filtered mixed liquid enters the diversion pipe 17 for diversion, and then is sprayed through the nozzle 31.

[0026] A support plate 21 is fixedly installed on the upper end of the support plate 19, and a hydraulic cylinder 22 is fixedly installed in the center of the upper part of the support plate 21. The front end of the hydraulic rod of the hydraulic cylinder 22 is fixedly installed in the center of the bottom of the adjustment seat 23. When working, when irrigating shrubs, due to the different growth heights of shrubs, the hydraulic cylinder 22 is started, and the hydraulic rod of the hydraulic cylinder 22 pushes the adjustment seat 23 to rise. At the same time, the limit rod 20 slides in the support plate 19, and the adjustment seat 23 drives the sprinkler pipe 30 and the nozzle 31 to rise above the shrubs to irrigate them.

[0027] Screw rods 25 are provided on both sides of the adjusting seat 23, and the threads on the two screw rods 25 are in opposite directions. The two ends of the screw rods 25 are rotatably installed in the adjusting seat 23 through bearings. A threaded hole is opened on one side of the slide 27, and the slide 27 is slidably installed on the screw rod 25 through the threaded hole. The same end of the screw rod 25 passes through the adjusting seat 23 and is fixedly installed with gears 26. The two gears 26 are meshed with each other. A motor 24 is fixedly installed on one side of the other end of the adjusting seat 23, and the rotating shaft of the motor 24 is fixedly connected to one end of the screw rod 25; when working, when irrigating shrubs, when irrigating shrubs within different widths, the motor 24 is started, and the motor 24 drives the screw rod 25 to rotate. Under the interaction of the gear 26 at the other end of the screw rod 25, the two screw rods 25 rotate at the same time, driving the two slides 27 to slide in the opposite direction, and pushing the sprinkler pipe 30 to extend toward the adjusting seat 23 until the shrubs within a certain width on both sides are covered.

[0028] Working principle: the existing irrigation device is not convenient for filtering the residual medicine residue of the mixed and stirred medicine solution, and it is not convenient for adjusting the position of the water spray according to the height and width of the vegetation. When irrigating the shrubs, the fertilizer is put into the water storage tank 2 through the feed port 3, and the rotating motor 12 is started. The rotating shaft of the rotating motor 12 drives the transmission wheel 11 to rotate, and drives the rotating wheel 9 to rotate under the cooperation of the belt 10. The rotating wheel 9 drives the stirring shaft 5 to rotate to mix the fertilizer and water. The rotation of the stirring shaft 5 drives the stirring rod 6 to rotate, and the stirring rod 6 drives The scraper 7 rotates, and one side of the scraper 7 is always tangential to the inner wall of the water storage tank 2 while rotating to scrape off the impurities and fertilizer residues on the inner wall. The water pump 13 is started to extract the mixture of fertilizer and water in the water storage tank 2 and pump it into the filter tank 14. The fertilizer and water mixture enters the filter tank 14 and falls into the filter cartridge 15 for filtration. The mixed impurities are filtered in the filter cartridge 15. The filtered mixed liquid enters the diversion pipe 17 for diversion, and is diverted to the hoses 18 on both sides, and respectively enters the two conduits 28, and is driven by the piston 29. The motor 24 is started, and the motor 24 drives the screw rod 25 to rotate. Under the interaction of the gear 26 at the other end of the screw rod 25, the two screw rods 25 rotate at the same time, driving the two slides 27 to slide in the opposite direction, pushing the sprinkler pipe 30 to extend toward the adjustment seat 23. At the same time, the guide tube 28 and the piston 29 slide in the sprinkler pipe 30, and the liquid is sprayed on the bushes through the nozzle 31 at the front end of the piston 29. When irrigating the bushes, due to the different growth heights of the bushes, the hydraulic cylinder 22 is started, and the hydraulic rod of the hydraulic cylinder 22 The adjusting seat 23 is pushed upward, and the limiting rod 20 slides in the pillar 19. The adjusting seat 23 drives the sprinkler pipe 30 and the nozzle 31 to rise above the shrub. The base 1 is pushed by the handle 35. The base 1 rotates the roller 34 through the support column 32 and the support 33 to drive the irrigation machine to move. When turning, the handle 35 is applied to one side to rotate the support 33 to control the turning of the base 1. The shrubs are continuously irrigated until the irrigation is completed. The tank cover 16 is removed, the filter cartridge 15 is taken out, the impurities inside are removed and reinstalled, and the irrigation is completed.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A shrub irrigation machine, characterized in that: The invention comprises a base (1); a handle (35) is fixedly mounted on one side of the base (1); a water storage tank (2) is fixedly mounted on one end of the upper part of the base (1); a water inlet (4) is provided on one end of the upper part of the water storage tank (2); a feed inlet (3) is provided in the center of the top of the water storage tank (2); a water outlet is provided in the center of the bottom of the water storage tank (2); a connecting pipe (8) is fixedly mounted on the water outlet; a mounting seat is provided on one side of the water storage tank (2); a water pump is fixedly mounted on the mounting seat (13), the other end of the connecting pipe (8) is fixedly connected to the water inlet end of the water pump (13), a filter tank (14) is provided on one side of the water pump (13) and is fixedly mounted on the base (1), the water outlet end of the water pump (13) is fixedly connected to one side of the upper end of the filter tank (14), the water outlet side of the filter tank (14) is fixedly connected to a diversion pipe (17), the other end of the base (1) is fixedly mounted with pillars (19) on both sides, and the upper ends of the pillars (19) are provided with sliding holes, A limit rod (20) is slidably mounted in the slide hole, an adjustment seat (23) is fixedly mounted on the top of the limit rod (20), slide rails are welded on the upper parts of both sides of the adjustment seat (23), a slide table (27) is slidably mounted on the slide rails, a sprinkler pipe (30) is fixedly mounted on the slide table (27), and a plurality of nozzles (31) are arranged side by side at the bottom of the sprinkler pipe (30). A guide tube (28) is fixedly mounted on different sides of the two ends of the adjustment seat (23), a piston (29) is fixedly mounted on the front end of the guide tube (28), a water hole is opened at one end of the piston (29), a hose (18) is fixedly connected to the other end of the guide tube (28), and the hose (18) is fixedly connected to the two sides of the two ends of the diversion pipe (17), and support columns (32) are fixedly mounted at the four corners of the bottom of the base (1), a support (33) is rotatably mounted in the support column (32), and a roller (34) is rotatably mounted in the support (33) through a rotating shaft.

2. A shrub irrigation machine according to claim 1, characterized in that: A stirring shaft (5) is horizontally arranged in the water storage tank (2), and both ends of the stirring shaft (5) are rotatably mounted in the water storage tank (2) via bearings. One end of the stirring shaft (5) passes through a tank body on one side of the water storage tank (2) and is fixedly mounted with a rotating wheel (9). A rotating motor (12) is arranged on one side below the water storage tank (2) and is fixedly mounted on the base (1). A transmission wheel (11) is fixedly mounted on the front end of the rotating shaft of the rotating motor (12), and the rotating wheel (9) and the transmission wheel (11) rotate in coordination via a belt (10).

3. A shrub irrigation machine according to claim 2, characterized in that: A plurality of stirring rods (6) are fixedly mounted in parallel on both sides of the stirring shaft (5), and a scraper (7) is fixedly mounted at the front ends of the stirring rods (6) on both sides of the stirring shaft (5).

4. A shrub irrigation machine according to claim 1, characterized in that: A hanging platform is provided at the upper end of the interior of the filter tank (14), a filter cartridge (15) is fixedly mounted on the upper portion of the hanging platform, and a tank cover (16) is fixedly mounted on the top of the filter tank (14).

5. A shrub irrigation machine according to claim 1, characterized in that: A support plate (21) is fixedly mounted on the upper end of the support column (19), a hydraulic cylinder (22) is fixedly mounted at the center of the upper portion of the support plate (21), and a front end of a hydraulic rod of the hydraulic cylinder (22) is fixedly mounted at the center of the bottom of an adjustment seat (23).

6. A shrub irrigation machine according to claim 1, characterized in that: Screw rods (25) are arranged on both sides of the adjusting seat (23), and the threads on the two screw rods (25) are in opposite directions. The two ends of the screw rods (25) are rotatably mounted in the adjusting seat (23) through bearings. A threaded hole is opened on one side of the slide (27), and the slide (27) is slidably mounted on the screw rods (25) through the threaded hole. The same end of the screw rods (25) passes through the adjusting seat (23) and is fixedly mounted with a gear (26). The two gears (26) are meshed with each other. A motor (24) is fixedly mounted on one side of the other end of the adjusting seat (23), and the rotating shaft of the motor (24) is fixedly connected to one end of the screw rod (25).