Water and fertilizer integrated irrigation device for tobacco planting

Abstract

The utility model belongs to the technical field of water and fertilizer integrated irrigation, and particularly relates to a water and fertilizer integrated irrigation device for tobacco planting. The device comprises a main pipeline, and the surface of the main pipeline is fixedly connected with a centrifugal filter, a gravel filter, a backwash laminated filter and a three-way pipe I, wherein the surface of the main pipeline is fixedly connected with the centrifugal filter, the gravel filter, the backwash laminated filter and the three-way pipe I; an auxiliary mechanism is arranged, along with continuous rotation of a stirring rod, a fixing ring can be driven to rotate together, so that a connecting block drives an adjusting block and a scraping plate to continuously rotate at the bottom of the fertilizer tank, and the inner wall of the fertilizer tank is scraped; in this way, the situation that the fertilizer adheres to the inner wall of the fertilizer applying barrel or is deposited at the bottom of the fertilizer applying barrel to be mixed unevenly or block a main pipeline is reduced, and the irrigation efficiency and the water and fertilizer utilization rate are effectively improved; and the scraper blade can be still attached to the inner wall of the fertilizer tank after long-time operation and abrasion.

Description

Technical Field

[0001] This utility model relates to the field of integrated water and fertilizer irrigation technology, specifically to an integrated water and fertilizer irrigation device for tobacco planting. Background Technology

[0002] Integrated water and fertilizer irrigation technology is a modern agricultural technology that combines irrigation and fertilization. It dissolves soluble fertilizers in water through a pipeline system to achieve simultaneous water and fertilizer supply. In tobacco cultivation, this technology can improve water and fertilizer utilization, reduce labor intensity, promote tobacco plant growth, and improve tobacco leaf quality and yield.

[0003] An existing Chinese patent (authorization announcement number: CN222322202U) discloses an integrated water and fertilizer irrigation device, which includes a fertilizer tank. The inner surface of the fertilizer tank is equipped with a cleaning mechanism. This integrated water and fertilizer irrigation device, through the arrangement of a chute, a limiting slider, a water inlet, a first nut, a sensor, a first threaded hole, a spray pipe, a water outlet, and a display screen, allows water to be injected into the water inlet during use. After the water enters, it can flow along the spray pipe. Due to the setting of the water outlet, the inside of the fertilizer tank can be cleaned. When the water flows through the sensor, the sensor can count the water flow rate and velocity, and display them in real time on the display screen. If the sensor needs to be replaced or repaired, it can be done by rotating the first nut and the first threaded hole. If the fertilizer tank is not cleaned properly, the water inlet can be rotated by the chute and the limiting slider. The water inlet can drive the spray pipe to rotate, so that the cleaning area of ​​the water outlet is larger.

[0004] In the aforementioned literature, a cleaning mechanism can be set up to quickly clean the inside of the fertilizer tank. However, in actual use, irrigation water is usually introduced into the fertilizer tank and mixed with fertilizer before irrigation, and a stirring device is used to make the two mix quickly and evenly. However, during the stirring process, some fertilizer that has not come into contact with water in time may adhere to the inner wall of the fertilizer tank or settle at the bottom of the fertilizer tank, thereby affecting the water and fertilizer mixing effect. It may also cause blockage of the connecting pipe, affecting subsequent irrigation. Therefore, this application provides an integrated water and fertilizer irrigation device for tobacco planting. Utility Model Content

[0005] The purpose of this application is to provide an integrated water and fertilizer irrigation device for tobacco cultivation, which addresses the problem that fertilizer may adhere to the inner wall of the fertilizer tank or settle at the bottom of the fertilizer tank, thereby affecting the water and fertilizer mixing effect.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution:

[0007] An integrated water and fertilizer irrigation device for tobacco cultivation includes a main pipeline, a centrifugal filter, a sand filter, and a backwash disc filter fixedly connected to the surface of the main pipeline. A T-connector is fixedly connected to the surface of the main pipeline, with the other end of the T-connector fixedly connected to an integrated water and fertilizer machine. A water injection pipe is fixedly connected to the surface of the main pipeline, with the other end of the water injection pipe fixedly connected to a fertilizer tank. A second T-connector is fixedly connected to one end of the surface of the fertilizer tank, with the other end of the second T-connector fixedly connected to the surface of the main pipeline. A cover is installed on the top of the fertilizer tank, and a motor is fixedly connected to the top of the cover. A stirring rod is fixedly connected to the output end of the motor, and multiple stirring blades are evenly fixedly connected to the surface of the stirring rod. An auxiliary mechanism is installed at the bottom of the stirring rod. Adjustment mechanisms are installed on both sides of the fertilizer tank, and a monitoring mechanism is installed on the surface of the fertilizer tank.

[0008] Preferably, the auxiliary mechanism includes a fixing ring fixedly connected to the bottom end of the stirring rod, and a snap-fit ​​block fixedly connected to both sides of the fixing ring. The snap-fit ​​block has a snap-fit ​​groove inside, and a T-shaped block is slidably connected in the snap-fit ​​groove. A connecting block is fixedly connected to one end of the T-shaped block, and an adjusting block is slidably connected in the connecting block. A scraper is fixedly connected to one end of the adjusting block, and one side of the scraper is in contact with the inner wall of the fertilizer tank.

[0009] Preferably, a spring is fixedly connected inside the connecting block, and both ends of the spring are fixedly connected to the connecting block and the adjusting block respectively. A sealing ring is fixedly connected to one end inside the connecting block, and the adjusting block is slidably connected inside the sealing ring.

[0010] Preferably, the spring is made of stainless steel.

[0011] Preferably, the adjusting mechanism includes support blocks symmetrically fixedly connected to both sides of the fertilizer tank, one of the support blocks having a lead screw rotatably connected inside, and the bottom of the other support block having a second motor fixedly connected. The output end of the second motor is fixedly connected to one end of the lead screw, and a connecting post is threadedly connected to the lead screw. The connecting post is slidably connected inside the support block, and one end of the connecting post is fixedly connected to the cover.

[0012] Preferably, a guide rod is fixedly connected inside another support block, and a second connecting post is slidably connected to the guide rod, with one end of the second connecting post being fixedly connected to the cover.

[0013] Preferably, the monitoring mechanism includes a fixed block fixedly connected to one side of the bottom of the fertilizer tank, one side of the fixed block being connected through the fertilizer tank, a fixed rod fixedly connected inside the fixed block, a float plate slidably connected to the fixed rod, a pressure sensor fixedly connected to the bottom surface inside the fixed block, and the pressure sensor being electrically connected to the fertilizer tank.

[0014] In summary, this application includes at least one of the following beneficial effects;

[0015] 1. This application includes an auxiliary mechanism. As the stirring rod rotates continuously, it drives the fixed ring to rotate as well. This, in turn, drives the adjusting block and scraper to rotate continuously at the bottom of the fertilizer tank via the connecting block, scraping the inner wall of the fertilizer tank. This reduces the situation where fertilizer adheres to the inner wall of the fertilizer tank or settles at the bottom of the fertilizer tank, resulting in uneven mixing or clogging of the main pipe. This effectively improves irrigation efficiency and water and fertilizer utilization. At the same time, during the rotation, the elasticity of the spring guides the scraper to push forward continuously, so that even after the scraper wears out from long-term operation, it can still adhere to the inner wall of the fertilizer tank.

[0016] 2. This application includes a monitoring mechanism and an adjustment mechanism. The monitoring mechanism provides early warnings and reminders to replenish water and fertilizer in a timely manner to avoid affecting subsequent irrigation. The adjustment mechanism causes the lid to rise gradually, thereby pulling the mixing blades and auxiliary mechanisms out of the fertilizer tank, allowing for quick replacement without having to go deep into the tank. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the main body of the device in this application;

[0018] Figure 2 This is a side view of the main body of the device in this application;

[0019] Figure 3 This is a schematic diagram of the internal structure of the fertilizer tank in this application;

[0020] Figure 4 This is a schematic diagram of the internal structure of the auxiliary mechanism in this application;

[0021] Figure 5 This is a schematic diagram showing the breakdown of the auxiliary institutions in this application;

[0022] Figure 6 This is a three-dimensional structural diagram of the monitoring agency in this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Main pipe; 2. Centrifugal filter; 3. Sand filter; 4. Backwash disc filter; 5. T-pipe one; 6. Water and fertilizer integrated machine; 7. Water injection pipe; 8. Fertilizer tank; 9. T-pipe two; 10. Cover; 11. Motor one; 12. Stirring rod; 13. Stirring blade; 14. Fixing ring; 15. Snap-fit ​​block; 16. T-block; 17. Connecting block; 18. Adjusting block; 19. Scraper; 20. Spring; 21. Sealing ring; 22. Support block; 23. Lead screw; 24. Motor two; 25. Connecting column one; 26. Guide rod; 27. Connecting column two; 28. Fixing block; 29. ​​Fixing rod; 30. Float plate; 31. Pressure sensor. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 —6. The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0026] This application discloses an integrated water and fertilizer irrigation device for tobacco cultivation.

[0027] Reference Figure 1 and Figure 2 A water and fertilizer integrated irrigation device for tobacco planting includes a main pipe 1, a centrifugal filter 2, a sand filter 3, a backwash disc filter 4, a T-pipe 5, a water and fertilizer integrated machine 6, a water injection pipe 7, a fertilizer tank 8, and a T-pipe 2 9. The other end of the connecting pipe 2 9 is fixedly connected to the surface of the main pipe 1. The top of the fertilizer tank 8 is equipped with a cover 10. The top of the cover 10 is fixedly connected to a motor 11. The output end of the motor 11 is fixedly connected to a stirring rod 12. Multiple stirring blades 13 are evenly fixedly connected to the surface of the stirring rod 12. An auxiliary mechanism is installed at the bottom of the stirring rod 12. Adjustment mechanisms are installed on both sides of the surface of the fertilizer tank 8. A monitoring mechanism is installed on the surface of the fertilizer tank 8. One end of the main pipe 1 can be connected to an external water pump, and the other end of the main pipe 1 can be connected to an external irrigation head.

[0028] During irrigation, water is pumped through the main pipeline 1 and then passed through a centrifugal filter 2 to remove sand and gravel particles. It then passes through a sand filter 3 to remove floating and suspended solids, and finally through a backwash disc filter 4 for a three-stage filtration process, ensuring the water meets irrigation requirements. The filtered water then flows into the fertilizer tank 8 through the water inlet pipe 7. At this point, the motor 11 is activated by preset values ​​and controls in the integrated water and fertilizer machine 6. The high-speed rotation of the motor 11 drives the stirring rod 12 and stirring blades 13 to rotate inside the fertilizer tank 8, uniformly mixing the water and fertilizer to achieve the desired irrigation conditions. The standard for irrigation is that, during the rotation of the stirring rod 12, the auxiliary mechanism at the bottom will also be driven to operate. The auxiliary mechanism can scrape off the fertilizer residue adhering to the inner wall of the fertilizer tank 8 in time during the mixing process, so that it can re-contact with the water flow and mix again. At the same time, it can also assist in stirring the bottom of the fertilizer tank 8, thereby reducing the situation of fertilizer adhering to the inner wall of the fertilizer bucket or settling at the bottom of the fertilizer bucket, resulting in uneven mixing or clogging of the main pipe 1. This effectively improves irrigation efficiency and water and fertilizer utilization. After the water and fertilizer are mixed, they will flow into the interior of the main pipe 1 through the three-way pipe 2 9. Then, through the irrigation head connected to one end of the main pipe 1, the water and fertilizer mixture will be poured onto the roots of the tobacco through sprinkler or drip irrigation, realizing integrated irrigation.

[0029] Secondly, once the fertilizer tank 8 reaches saturation, the external water pump can be shut off to prevent the mixture from overflowing. During prolonged irrigation, when the water-fertilizer mixture gradually decreases, a monitoring device can be used to issue an early warning, reminding the user to replenish water and fertilizer in time to avoid affecting subsequent irrigation. When it is necessary to replace or repair the mixing equipment or auxiliary mechanism inside the fertilizer tank 8, the cover 10 can be gradually raised by adjusting the mechanism, thereby pulling the mixing blade 13 and auxiliary mechanism out of the fertilizer tank 8, allowing for quick replacement without having to reach into the tank.

[0030] Reference Figure 3 , Figure 4 and Figure 5 The auxiliary mechanism includes a fixing ring 14 fixedly connected to the bottom end of the stirring rod 12. Both sides of the fixing ring 14 are fixedly connected to snap-fit ​​blocks 15. The snap-fit ​​blocks 15 have a snap-fit ​​groove inside. A T-shaped block 16 is slidably connected in the snap-fit ​​groove. A connecting block 17 is fixedly connected to one end of the T-shaped block 16. An adjusting block 18 is slidably connected in the connecting block 17. A scraper 19 is fixedly connected to one end of the adjusting block 18. One side of the scraper 19 is in contact with the inner wall of the fertilizer tank 8. A spring 20 is fixedly connected inside the connecting block 17. The two ends of the spring 20 are fixedly connected to the connecting block 17 and the adjusting block 18, respectively. A sealing ring 21 is fixedly connected to one end of the connecting block 17. The adjusting block 18 is slidably connected in the sealing ring 21. The spring 20 is made of stainless steel.

[0031] During use, as the stirring rod 12 rotates continuously, it drives the fixing ring 14 to rotate as well. At this time, the fixing ring 14, through the snap-fit ​​block 15 and the T-shaped block 16, drives the connecting block 17 to rotate in a circular motion. This, in turn, drives the adjusting block 18 and the scraper 19 to rotate continuously at the bottom of the fertilizer tank 8. The continuous rotation of the scraper 19 scrapes the inner wall of the fertilizer tank 8, reducing the likelihood of fertilizer adhering to the inner wall of the fertilizer tank or settling at the bottom, resulting in uneven mixing or clogging of the main pipe 1. This effectively improves irrigation efficiency and water and fertilizer utilization. Simultaneously, during rotation, the spring 20... The elastic guide will always push the scraper 19 forward, so that even after the scraper 19 wears out from long-term operation, it can still fit against the inner wall of the fertilizer tank 8. In addition, the sealing ring 21 can effectively reduce the liquid from entering the interior of the connecting block 17. The spring 20 is made of stainless steel, which gives the spring 20 strong corrosion resistance, ensuring the stability and durability of the structure and maintaining excellent mechanical properties during long-term use. Secondly, during maintenance, the connecting block 17 can be pulled upward to pull the T-shaped block 16 out from the snap-fit ​​block 15, so that it can be quickly replaced.

[0032] Reference Figure 1 and Figure 3 The adjustment mechanism includes support blocks 22 symmetrically fixedly connected to both sides of the fertilizer tank 8. A lead screw 23 is rotatably connected inside one of the support blocks 22. A second motor 24 is fixedly connected to the bottom of the other support block 22. The output end of the second motor 24 is fixedly connected to one end of the lead screw 23. A connecting post 25 is threadedly connected to the lead screw 23. The connecting post 25 is slidably connected inside the support block 22. One end of the connecting post 25 is fixedly connected to the cover 10. A guide rod 26 is fixedly connected inside the other support block 22. A second connecting post 27 is slidably connected to the guide rod 26. One end of the second connecting post 27 is fixedly connected to the cover 10.

[0033] In use, motor 24 can be started first to drive screw 23 to rotate. The rotation of screw 23 will cause connecting post 25, which is threaded to it, to slide up and down inside support block 22. In this way, connecting post 25 will drive cover 10 and motor 11 and other structures to gradually rise. When connecting post 25 rises, connecting post 27, which is fixedly connected to it, will slide on guide rod 26 through cover 10. The synchronous sliding of connecting post 25 and connecting post 27 can ensure that cover 10 remains horizontal during the lifting process, avoiding damage to internal parts caused by tilting of cover 10. After cover 10 is raised, the internal structure can be pulled out of fertilizer tank 8, so that replacement and maintenance can be carried out quickly without going deep into the tank, which effectively improves work efficiency and reduces work difficulty.

[0034] Reference Figure 1 and Figure 6The monitoring mechanism includes a fixed block 28 fixedly connected to one side of the bottom of the fertilizer tank 8. One side of the fixed block 28 is connected through the fertilizer tank 8. A fixed rod 29 is fixedly connected inside the fixed block 28. A float plate 30 is slidably connected to the fixed rod 29. A pressure sensor 31 is fixedly connected to the bottom surface inside the fixed block 28. The pressure sensor 31 is electrically connected to the fertilizer tank 8.

[0035] During use, since the fixed block 28 is connected to the fertilizer tank 8, the liquid will enter the fixed block 28. Due to buoyancy, the float 30 will gradually rise. During long-term irrigation, when the water-fertilizer mixture gradually decreases, the float 30 will descend along with the fixed rod 29 as the liquid level drops. When the float 30 comes into contact with the pressure sensor 31, the pressure sensor 31 will transmit the information to the fertilizer tank 8 in a timely manner to control the external water pump to run in time to replenish the water inside the fertilizer tank 8.

[0036] The implementation principle of this embodiment of an integrated water and fertilizer irrigation device for tobacco planting is as follows: During irrigation, water is pumped through the main pipeline 1 and then passed through a centrifugal filter 2 to filter out sand and gravel particles. It then passes through a sand and gravel filter 3 to filter out floating and suspended solids, and finally through a backwash disc filter 4 for three-stage filtration to ensure the water quality meets irrigation requirements. The filtered water then flows into the fertilizer tank 8 through the water injection pipe 7. At this time, the motor 11 is started by preset values ​​and controls in the integrated water and fertilizer machine 6. The high-speed rotation of the motor 11 drives the stirring rod 12 and stirring blade 13 to rotate inside the fertilizer tank 8, thus uniformly mixing the water and fertilizer until they gradually meet the standards for tobacco irrigation. As the stirring rod 12 continues to rotate, it drives the fixing ring 14 to rotate as well. The fixing ring 14, through the snap-fit ​​block 15 and T-shaped block 16, drives the connecting block 17 to rotate in a circular motion, thereby driving the connecting block 17 to rotate... The adjusting block 18 and scraper 19 rotate continuously at the bottom of the fertilizer tank 8. The continuous rotation of the scraper 19 scrapes the inner wall of the fertilizer tank 8, thereby reducing the situation where fertilizer adheres to the inner wall of the fertilizer tank or settles at the bottom of the fertilizer tank, resulting in uneven mixing or clogging of the main pipe 1. This effectively improves irrigation efficiency and water and fertilizer utilization. At the same time, during the rotation, the elastic guidance of the spring 20 will always push the scraper 19 forward, so that even after the scraper 19 wears out from long-term operation, it can still stick to the inner wall of the fertilizer tank 8. In addition, the sealing ring 21 can effectively reduce the liquid from entering the interior of the connecting block 17. The spring 20 is made of stainless steel, which gives the spring 20 strong corrosion resistance, ensuring the stability and durability of the structure and maintaining excellent mechanical properties during long-term use. After the water and fertilizer are mixed, they will flow into the interior of the main pipe 1 through the three-way pipe 29. Then, the water and fertilizer mixture is poured onto the roots of the tobacco through the irrigation head connected to one end of the main pipe 1 by sprinkler or drip irrigation, realizing integrated irrigation.

[0037] Secondly, once the fertilizer tank 8 reaches saturation, the external water pump can be shut off to prevent the mixture from overflowing. During prolonged irrigation, as the water-fertilizer mixture gradually decreases, the drop in liquid level will cause the float 30 to descend along with the fixed rod 29. When the float 30 contacts the pressure sensor 31, the pressure sensor 31 will promptly transmit information to the fertilizer tank 8, controlling the external water pump to replenish the water supply to the fertilizer tank 8 and prevent disruption to subsequent irrigation. When it is necessary to replace or repair the mixing equipment or auxiliary mechanisms inside the fertilizer tank 8, the motor 24 can be started to rotate the lead screw 23. The rotation of the lead screw 23 will then rotate the threaded connecting column. Connecting column 25 slides up and down inside support block 22, thereby driving the cover 10 and motor 11 to gradually rise. When connecting column 25 rises, it drives connecting column 27, which is fixedly connected to it, to slide on guide rod 26. The synchronous sliding of connecting column 25 and connecting column 27 ensures that the cover 10 remains horizontal during the rising process, avoiding damage to internal parts caused by tilting of the cover 10. After the cover 10 is raised, the internal structure can be pulled out of fertilizer tank 8, allowing for quick replacement and maintenance without having to go deep into the tank, effectively improving work efficiency and reducing work difficulty.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A water and fertilizer integrated irrigation device for tobacco planting, comprising a main pipeline (1), characterized in that: A centrifugal filter (2) is fixedly connected to the surface of the main pipe (1). A sand filter (3) is fixedly connected to the surface of the main pipe (1). A backwash disc filter (4) is fixedly connected to the surface of the main pipe (1). A three-way pipe (5) is fixedly connected to the surface of the main pipe (1). A water-fertilizer integrated machine (6) is fixedly connected to the other end of the three-way pipe (5). A water injection pipe (7) is fixedly connected to the surface of the main pipe (1). A fertilizer tank (8) is fixedly connected to the other end of the water injection pipe (7). A fertilizer tank (8) is fixedly connected to one end of the surface of the fertilizer tank (8). Three-way pipe two (9), the other end of which is fixedly connected to the surface of the main pipe (1), a cover (10) is installed on the top of the fertilizer tank (8), a motor (11) is fixedly connected to the top of the cover (10), a stirring rod (12) is fixedly connected to the output end of the motor (11), a plurality of stirring blades (13) are evenly fixedly connected to the surface of the stirring rod (12), an auxiliary mechanism is installed at the bottom of the stirring rod (12), an adjustment mechanism is installed on both sides of the surface of the fertilizer tank (8), and a monitoring mechanism is installed on the surface of the fertilizer tank (8).

2. The integrated water and fertilizer irrigation device for tobacco planting according to claim 1, characterized in that: The auxiliary mechanism includes a fixed ring (14) fixedly connected to the bottom end of the stirring rod (12). Both sides of the fixed ring (14) are fixedly connected to snap-fit ​​blocks (15). The snap-fit ​​blocks (15) have a snap-fit ​​groove inside. A T-shaped block (16) is slidably connected in the snap-fit ​​groove. A connecting block (17) is fixedly connected to one end of the T-shaped block (16). An adjusting block (18) is slidably connected in the connecting block (17). A scraper (19) is fixedly connected to one end of the adjusting block (18). One side of the scraper (19) is in contact with the inner wall of the fertilizer tank (8).

3. The integrated water and fertilizer irrigation device for tobacco planting according to claim 2, characterized in that: A spring (20) is fixedly connected inside the connecting block (17). The two ends of the spring (20) are fixedly connected to the connecting block (17) and the adjusting block (18) respectively. A sealing ring (21) is fixedly connected to one end inside the connecting block (17). The adjusting block (18) is slidably connected inside the sealing ring (21).

4. The integrated water and fertilizer irrigation device for tobacco planting according to claim 3, characterized in that: The spring (20) is made of stainless steel.

5. The integrated water and fertilizer irrigation device for tobacco planting according to claim 1, characterized in that: The adjustment mechanism includes support blocks (22) symmetrically fixedly connected to both sides of the fertilizer tank (8). A lead screw (23) is rotatably connected inside one of the support blocks (22). A motor (24) is fixedly connected to the bottom of one of the support blocks (22). The output end of the motor (24) is fixedly connected to one end of the lead screw (23). A connecting post (25) is threaded onto the lead screw (23). The connecting post (25) is slidably connected inside the support block (22). One end of the connecting post (25) is fixedly connected to the cover (10).

6. The integrated water and fertilizer irrigation device for tobacco planting according to claim 5, characterized in that: Another support block (22) is fixedly connected to a guide rod (26), and a connecting post (27) is slidably connected to the guide rod (26). One end of the connecting post (27) is fixedly connected to the cover (10).

7. The integrated water and fertilizer irrigation device for tobacco planting according to claim 1, characterized in that: The monitoring mechanism includes a fixed block (28) fixedly connected to one side of the bottom of the fertilizer tank (8). One side of the fixed block (28) is connected through the fertilizer tank (8). A fixed rod (29) is fixedly connected inside the fixed block (28). A float plate (30) is slidably connected to the fixed rod (29). A pressure sensor (31) is fixedly connected to the bottom surface inside the fixed block (28). The pressure sensor (31) is electrically connected to the fertilizer tank (8).

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