Intelligent agricultural fertilization and irrigation device

Abstract

The invention relates to the technical field of intelligent agricultural equipment, and discloses an intelligent agricultural fertilization and irrigation device which comprises a water and fertilizer machine body and a mixing box arranged in the water and fertilizer machine body and further comprises a fertilizer outlet pipe fixedly communicated with the mixing box, and the end, away from the mixing box, of the fertilizer outlet pipe penetrates through the side wall of the water and fertilizer machine body. A conical filter screen is fixedly mounted on the inner side wall of the fertilizer outlet pipe, and a fixing ring is rotationally mounted at the top of the conical filter screen. The purpose of monitoring and cleaning the blocking condition of the conical filter screen in real time is achieved by sensing the pressure difference of fluid in the cylinder body, the stability of water and fertilizer flow can be kept, it can be ensured that an irrigation system can efficiently and evenly provide water and nutrients for crops, and therefore the irrigation effect is optimized, the overall efficiency of the irrigation system is improved, and the service life of the irrigation system is prolonged. Resource waste is reduced, healthy growth of crops is ensured, the damage rate of pipelines or nozzles is reduced, the maintenance cost is reduced, and the effect of improving agricultural production benefits is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of smart agricultural equipment, and in particular to a smart agricultural fertilization and irrigation device. Background Art

[0002] Smart agricultural fertilization specifically refers to a modern agricultural fertilization method that uses modern information technology, Internet of Things technology, big data analysis, and artificial intelligence to monitor and analyze farmland soil nutrients, crop fertilizer requirements, climate conditions, etc. in real time during agricultural production, and automatically adjusts fertilizer types, dosages, and application times according to the actual needs of crop growth. The water-fertilizer integration in smart agricultural fertilization is a modern agricultural management technology that integrates water-saving irrigation and efficient fertilization. It dissolves fertilizer in irrigation water and brings it to every crop in the field through irrigation pipes, achieving simultaneous supply of water and fertilizer, ensuring that crops absorb nutrients while absorbing water.

[0003] Among them, the water-fertilizer integrated machine transports water and fertilizer together to a mixer through a pressure system (such as a water pump), and the liquid or solid fertilizer is dissolved in the mixer and mixed evenly with the water. The mixed water-fertilizer solution will be immediately transported to the root area of ​​the crop through the pipeline system for drip irrigation. In the process of mixing fertilizer and water, although the water source is pre-filtered by the filter, the filter may not achieve the expected effect after long-term use, and there are chemical reactions between various fertilizers. When the mixed water and fertilizer are transported through the pipeline system, there is still a possibility of clogging the pipeline or nozzle. For this reason, a filter is installed at the fertilizer outlet of the water-fertilizer machine to filter the water and fertilizer to further prevent the pipeline and nozzle from being blocked. During the operation of the filter, if it cannot be monitored in real time and cleaned in time, a large amount of impurities, sediments or fertilizer residues will accumulate on the surface of the filter. These substances will gradually block the pores of the filter, and the flow and velocity of the water and fertilizer will be significantly affected. The water and fertilizer cannot be evenly transported to the irrigation area, and the overall efficiency of the drip irrigation system will be greatly reduced. It may also cause uneven system pressure, increase the burden on irrigation equipment, cause damage to pipelines or nozzles, and increase maintenance costs. Summary of the invention

[0004] The present application proposes an intelligent agricultural fertilization and irrigation device, which has the advantage of real-time monitoring and cleaning of the blockage of the conical filter. It can not only maintain the stability of the water and fertilizer flow, but also ensure that the irrigation system can efficiently and evenly provide water and nutrients to crops, thereby optimizing the irrigation effect, improving the overall efficiency of the irrigation system, reducing resource waste, ensuring the healthy growth of crops, reducing the damage rate of pipes or nozzles, reducing maintenance costs, and achieving the effect of improving agricultural production efficiency. It is used to solve the problem of reduced irrigation efficiency and increased maintenance costs due to the inability to monitor and clean the blockage of the filter at the fertilizer outlet in real time during the operation of the water-fertilizer integrated machine.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an intelligent agricultural fertilization and irrigation device, comprising a water and fertilizer machine body and a mixing box arranged inside the water and fertilizer machine body, and also comprising a fertilizer outlet pipe fixedly connected to the mixing box, wherein one end of the fertilizer outlet pipe away from the mixing box penetrates the side wall of the water and fertilizer machine body, a conical filter is fixedly installed on the inner side wall of the fertilizer outlet pipe, a fixing ring is rotatably installed on the top of the conical filter, and two scrapers that fit the outer surface of the conical filter are symmetrically fixedly installed at both ends of the fixing ring, so as to scrape off impurities accumulated on the surface of the conical filter; A cylinder is fixedly installed on the outside of the water and fertilizer machine body, a piston is slidably installed inside the cylinder body, a piston rod is fixedly installed on the top of the piston, an end of the piston rod away from the piston airtightly penetrates the top wall of the cylinder body, a spring is sleeved on the outside of the piston rod, and the two ends of the spring are respectively fixedly connected to the top of the piston and the inner top wall of the cylinder body, an inlet pipe and a outlet pipe are fixedly connected to the outside of the bottom end of the cylinder body, the diameter of the inlet pipe is larger than the diameter of the outlet pipe, and the ends of the inlet pipe and the outlet pipe away from the cylinder body are fixedly connected to the fertilizer outlet pipe, a connecting plate is fixedly installed on the top of the piston rod, a slide groove is provided on the outer wall of the water and fertilizer machine body close to the piston rod, and the end of the connecting plate close to the water and fertilizer machine body is slidably connected to the slide groove, a pressure sensor is fixedly installed on the inner top wall of the slide groove, and the pressure sensor is electrically connected to the controller inside the water and fertilizer machine body, and the controller is transmission connected to the fixing ring.

[0006] Furthermore, the fixed connection point between the liquid inlet pipe and the fertilizer outlet pipe is close to the outside of the water-fertilizer machine body, and the fixed connection point between the liquid outlet pipe and the fertilizer outlet pipe is far away from the outside of the water-fertilizer machine body.

[0007] Furthermore, an installation box is fixedly installed on the outer side of the fertilizer outlet pipe, a motor is fixedly installed on the inner bottom wall of the installation box, the pressure sensor is electrically connected to the motor, a rotating shaft is fixedly installed on the output end of the motor, a main gear is fixedly installed on the top of the rotating shaft, and the main gear is transmission-connected to the fixing ring.

[0008] Furthermore, two connecting rods are symmetrically fixedly installed at both ends of the fixing ring, and a slave gear meshing with the main gear is fixedly installed at the top ends of the two connecting rods.

[0009] Furthermore, a mounting groove matched with the slave gear is provided inside the side wall of the fertilizer discharge pipe to provide a movable space for the operation of the slave gear, and a movable groove connected with the mounting groove is provided on the inner side wall of the fertilizer discharge pipe to provide a movable space for the operation of the connecting rod.

[0010] Furthermore, a slag discharge port is provided on the outside of the fertilizer discharge pipe, and the slag discharge port is placed at the bottom end of the conical filter screen. A storage box is slidably installed on the outside of the water-fertilizer machine body. One end of the storage box close to the inside of the water-fertilizer machine body is in contact with the outer wall of the fertilizer discharge pipe, and the top wall of the storage box and the inner bottom wall of the slag discharge port are placed on the same horizontal plane.

[0011] The beneficial effects of the present invention are as follows: The present application provides an intelligent agricultural fertilization and irrigation device, which senses the pressure difference of the fluid inside the cylinder through a piston rod and a pressure sensor, so that when the conical filter is blocked by impurities to a certain extent, the motor will automatically start and drive the scraper through the main gear and the slave gear to clean the impurities accumulated on the surface of the conical filter, and automatically stop running after the cleaning is completed, thereby achieving the purpose of real-time monitoring and cleaning of the blockage of the conical filter, not only maintaining the stability of the water and fertilizer flow, but also ensuring that the irrigation system can efficiently and evenly provide water and nutrients to crops, thereby optimizing the irrigation effect, improving the overall efficiency of the irrigation system, reducing resource waste, ensuring the healthy growth of crops, reducing the damage rate of pipes or nozzles, reducing maintenance costs, and achieving the effect of improving agricultural production benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 A schematic diagram of a three-dimensional structure from another viewing angle of the present invention; Figure 3 It is a partial side cross-sectional structural schematic diagram of the water fertilizer machine body of the present invention; Figure 4 This is a schematic diagram of the structure of the fertilizer discharging pipe of the present invention; Figure 5 It is a partial side cross-sectional structural schematic diagram of the fertilizer discharging pipe of the present invention; Figure 6 It is a schematic diagram of the structure of the filter screen, the main gear and the slave gear of the present invention; Figure 7 For the present invention Figure 5 Enlarged structural diagram at A in the middle.

[0013] In the figure: 1. water-fertilizer machine body; 2. mixing box; 3. fertilizer outlet pipe; 4. conical filter; 41. fixing ring; 42. scraper; 5. cylinder body; 6. piston; 7. piston rod; 8. spring; 9. liquid inlet pipe; 10. liquid outlet pipe; 11. connecting plate; 12. slide groove; 13. pressure sensor; 14. installation box; 15. motor; 16. rotating shaft; 17. main gear; 18. connecting rod; 19. slave gear; 20. installation groove; 21. movable groove; 22. slag discharge port; 23. storage box. DETAILED DESCRIPTION

[0014] 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.

[0015] See also Figures 1 to 7 , an intelligent agricultural fertilization and irrigation device, comprising a water-fertilizer machine body 1 and a mixing box 2 arranged inside the water-fertilizer machine body 1, the water-fertilizer machine body 1 transports water and fertilizer to the mixing box 2 together through a pressure system, and liquid or solid fertilizer is dissolved and mixed with water in the mixing box 2, and also includes a fertilizer outlet pipe 3 fixedly connected to the mixing box 2, and the end of the fertilizer outlet pipe 3 away from the mixing box 2 penetrates the side wall of the water-fertilizer machine body 1 and is externally connected to a shunt pipe, and the water and fertilizer mixed in the mixing box 2 are transported to each shunt pipe and nozzle through the fertilizer outlet pipe 3 under the action of the pressure system, and finally through drip irrigation or sprinkler irrigation. The fertilizer flows to the crops by irrigation or the like. A conical filter screen 4 is fixedly installed on the inner wall of the fertilizer outlet pipe 3. One end of the fertilizer outlet pipe 3 on which the conical filter screen 4 is fixedly installed is placed inside the water-fertilizer machine body 1. Impurities in the water-fertilizer are intercepted by the conical filter screen 4. The surface area of ​​the conical filter screen 4 is increased compared with the filter screen arranged in a plane, and the interception effect of impurities is better. A fixing ring 41 is rotatably installed on the top of the conical filter screen 4. Two scrapers 42 that fit the outer surface of the conical filter screen 4 are symmetrically fixedly installed at both ends of the fixing ring 41, which are used to scrape off the impurities accumulated on the surface of the conical filter screen 4.

[0016] A cylinder body 5 is fixedly installed on the outside of the water-fertilizer machine body 1, a piston 6 is slidably installed inside the cylinder body 5, a piston rod 7 is fixedly installed on the top of the piston 6, and the end of the piston rod 7 away from the piston 6 airtightly penetrates the top wall of the cylinder body 5, a spring 8 is sleeved on the outside of the piston rod 7, and the two ends of the spring 8 are respectively fixedly connected to the top of the piston 6 and the inner top wall of the cylinder body 5, and the outside of the bottom end of the cylinder body 5 is fixedly connected with a liquid inlet pipe 9 and a liquid outlet pipe 10, the diameter of the liquid inlet pipe 9 is larger than the diameter of the liquid outlet pipe 10, and the ends of the liquid inlet pipe 9 and the liquid outlet pipe 10 away from the cylinder body 5 are fixedly connected with the fertilizer outlet pipe 3, the fixed connection point between the liquid inlet pipe 9 and the fertilizer outlet pipe 3 is close to the outside of the water-fertilizer machine body 1, and the fixed connection point between the liquid outlet pipe 10 and the fertilizer outlet pipe 3 is far from the outside of the water-fertilizer machine body 1, when the water and fertilizer in the mixing box 2 flows out through the fertilizer outlet pipe 3, part of the water and fertilizer will flow through the liquid inlet pipe 9 Flows into the interior of the cylinder 5, and then flows out through the liquid outlet pipe 10 to merge with the fertilizer outlet pipe 3. Among them, since the diameter of the liquid inlet pipe 9 is larger than the diameter of the liquid outlet pipe 10, the flow rate of the water and fertilizer entering the cylinder 5 is less than the flow rate of the water and fertilizer flowing out of the cylinder 5, so a certain fluid pressure difference is formed inside the cylinder 5, and this fluid pressure difference will have a certain extrusion on the piston 6 and the spring 8. When the outer surface of the conical filter 4 is not blocked by impurities, the fluid pressure difference inside the cylinder 5 is in a relatively constant state, so the piston 6 and the piston rod 7 will be relatively stable and the position will not change. When the outer surface of the conical filter 4 is blocked by impurities, the water and fertilizer flow rate inside the fertilizer outlet pipe 3 is degraded, and the flow rate is reduced, the fluid pressure difference inside the cylinder 5 is also relatively reduced, so its extrusion force on the piston 6 is reduced, and the piston 6 and the piston rod 7 will move downward under the action of the elastic force of the spring 8.

[0017] A connecting plate 11 is fixedly installed on the top of the piston rod 7, a slide groove 12 is opened on the outer wall of the water and fertilizer machine body 1 on one side close to the piston rod 7, and the end of the connecting plate 11 close to the water and fertilizer machine body 1 is slidably connected to the slide groove 12, and a pressure sensor 13 is fixedly installed on the inner top wall of the slide groove 12, and the pressure sensor 13 is electrically connected to the controller inside the water and fertilizer machine body 1, and the controller is transmission-connected to the fixing ring 41. When the water and fertilizer machine body 1 is running, the fluid pressure difference inside the cylinder body 5 squeezes the piston 6 and the piston rod 7, so that the connecting plate 11 is pressed on the surface of the pressure sensor 13, and the force of the pressure sensor 13 is stable within a certain range, which also represents the normal operation of the water and fertilizer machine body 1 The linkage between the connecting plate 11 and the pressure sensor 13 replaces the method of directly installing the pressure sensor 13 inside the fertilizer outlet pipe 3, thereby avoiding direct contact between the pressure sensor 13 and the water and fertilizer, preventing it from being corroded by the water and fertilizer and affecting the detection result, and extending the service life of the pressure sensor 13. At the same time, the linkage between the connecting plate 11 and the pressure sensor 13 can also be used to determine whether the water and fertilizer machine body 1 is started normally during the initial operation of the water and fertilizer machine body 1. If the pressure on the pressure sensor 13 during the initial operation exceeds the rated value, it is necessary to perform troubleshooting on the water and fertilizer machine body 1, such as detecting whether the elastic force of the spring 8 inside the cylinder body 5 is normal, so that the water and fertilizer machine body 1 can operate normally; If the conical filter 4 is clogged by impurities and affects the flow of water and fertilizer, the difference between the flow rate of water and fertilizer entering the cylinder 5 and the flow rate of water and fertilizer flowing out of the cylinder 5 is reduced, and the fluid pressure difference inside the cylinder 5 is also reduced, and the extrusion force on the piston rod 7 and the connecting plate 11 is reduced. The connecting plate 11 moves downward under the action of the elastic force of the spring 8, and the connecting plate 11 gradually releases the pressure on the pressure sensor 13. After the pressure sensor 13 senses the pressure change, it converts the force into an electrical signal, and then transmits the electrical signal to the controller inside the water and fertilizer machine body 1. The controller then converts it into a control signal, which finally acts on the fixed ring 41, driving the fixed ring 41 to rotate. When the fixed ring 41 rotates, it drives the scraper 42 to rotate to scrape off the impurities on the surface of the conical filter 4, so as to achieve the purpose of real-time monitoring and cleaning of the conical filter 4, which can not only maintain the stability of the water and fertilizer flow, but also ensure that the irrigation system can efficiently and evenly provide water and nutrients to crops, thereby optimizing the irrigation effect, improving the overall efficiency of the irrigation system, reducing resource waste, ensuring the healthy growth of crops, and improving agricultural production efficiency.

[0018] See also Figures 1 to 7A mounting box 14 is fixedly installed on the outer side of the fertilizer outlet pipe 3, and a motor 15 is fixedly installed on the inner bottom wall of the mounting box 14. The pressure sensor 13 is electrically connected to the motor 15. A rotating shaft 16 is fixedly installed on the output end of the motor 15, and a main gear 17 is fixedly installed on the top of the rotating shaft 16. Two connecting rods 18 are symmetrically fixedly installed at both ends of the fixing ring 41. The tops of the two connecting rods 18 are jointly fixedly installed with a slave gear 19 that meshes with the main gear 17. After the pressure sensor 13 is subjected to pressure from the connecting plate 11, the pressure sensor 13 converts it into an electrical signal and transmits it to the controller, and the controller converts the electrical signal into a control signal for the motor 15. The motor 15 starts and drives the main gear 17 to rotate through the rotating shaft 16. The main gear 17 then drives the slave gear 19 to rotate through meshing transmission. The slave gear 19 drives the fixing ring 41 to rotate through the connecting rod 18, and finally drives the scraper 42 to rotate to scrape off impurities on the surface of the conical filter 4.

[0019] A mounting groove 20 adapted to the slave gear 19 is provided inside the side wall of the fertilizer discharge pipe 3 to provide a movable space for the operation of the slave gear 19. A movable groove 21 connected to the mounting groove 20 is provided on the inner wall of the fertilizer discharge pipe 3 to provide a movable space for the operation of the connecting rod 18. Since the slave gear 19 is placed inside the mounting groove 20, the slave gear 19 will not affect the flow of water and fertilizer inside the fertilizer discharge pipe 3, thereby preventing the slave gear 19 from affecting the irrigation efficiency.

[0020] A slag discharge port 22 is provided on the outside of the fertilizer discharge pipe 3, and the slag discharge port 22 is placed at the bottom end of the conical filter 4. A storage box 23 is slidably installed on the outside of the water-fertilizer machine body 1. The end of the storage box 23 close to the inside of the water-fertilizer machine body 1 is in contact with the outer wall of the fertilizer discharge pipe 3, and the top wall of the storage box 23 and the inner bottom wall of the slag discharge port 22 are placed on the same horizontal plane. When the scraper 42 moves on the surface of the conical filter 4 and scrapes off impurities, the impurities scraped off the conical filter 4 are pushed to the slag discharge port 22 by the scraper 42, and fall into the storage box 23 through the slag discharge port 22 under the action of gravity.

[0021] Working principle: The water-fertilizer machine body 1 transports water and fertilizer to the mixing box 2 together through the pressure system, and the liquid or solid fertilizer is dissolved and mixed with water in the mixing box 2. The mixed water and fertilizer in the mixing box 2 are transported to various branch pipes and nozzles through the fertilizer outlet pipe 3 under the action of the pressure system, and finally flow to the crops through drip irrigation or sprinkler irrigation. When the water and fertilizer in the mixing box 2 are filtered through the conical filter 4 inside the fertilizer outlet pipe 3 and flow out, part of the water and fertilizer will flow into the cylinder 5 through the liquid inlet pipe 9, and then flow out through the liquid outlet pipe 10 to merge with the fertilizer outlet pipe 3. Among them, since the diameter of the liquid inlet pipe 9 is larger than the diameter of the liquid outlet pipe 10, the flow rate of the water and fertilizer entering the cylinder 5 is less than The flow rate of the fluid out of the cylinder 5 is such that a certain fluid pressure difference is formed inside the cylinder 5. This fluid pressure difference will squeeze the pressure sensor 13 to a certain extent through the piston 6, the piston rod 7 and the connecting plate 11. When the outer surface of the conical filter 4 is not blocked by impurities, the fluid pressure difference inside the cylinder 5 is in a relatively constant state, so the piston 6 and the piston rod 7 will be relatively stable and their positions will not change. When the outer surface of the conical filter 4 is blocked by impurities, the water and fertilizer flow rate inside the fertilizer outlet pipe 3 is reduced, and the fluid pressure difference inside the cylinder 5 is relatively reduced, so the squeezing force on the piston 6 is reduced, and the piston 6 and the piston rod 7 will move downward under the action of the elastic force of the spring 8; When the piston rod 7 moves downward, the piston rod 7 drives the connecting plate 11 to move downward, and the connecting plate 11 gradually releases the pressure on the pressure sensor 13. After the pressure sensor 13 senses the pressure change, it converts the force into an electrical signal, and then transmits the electrical signal to the controller inside the water and fertilizer machine body 1. The controller then converts the electrical signal into a control signal for the motor 15. The motor 15 starts and drives the main gear 17 to rotate through the rotating shaft 16. The main gear 17 then drives the slave gear 19 to rotate through the meshing transmission. The slave gear 19 drives the fixing ring 41 to rotate through the connecting rod 18, and finally drives the scraper 42 to rotate to scrape off the impurities on the surface of the conical filter 4. When the impurities scraped off the conical filter 4 are pushed to the slag discharge port 22 by the scraper 42, they will fall into the storage box 23 through the slag discharge port 22 under the action of gravity. Inside, as the impurities on the surface of the conical filter 4 are gradually cleaned, the flow rate and flow velocity of the water and fertilizer in the fertilizer outlet pipe 3 are gradually restored, and the fluid pressure difference inside the cylinder 5 is gradually increased, so that the piston 6, the piston rod 7 and the connecting plate 11 are reset one after another, and finally the motor 15 stops running, and the scraper 42 stops cleaning the conical filter 4, so as to avoid the situation where long-term cleaning affects the interception effect of the conical filter 4. By sensing the change of the fluid pressure difference inside the cylinder 5, the purpose of real-time monitoring and cleaning of the conical filter 4 is achieved, which can not only maintain the stability of the water and fertilizer flow, but also ensure that the irrigation system can efficiently and evenly provide water and nutrients to crops, thereby optimizing the irrigation effect, improving the overall efficiency of the irrigation system, reducing resource waste, ensuring the healthy growth of crops, and improving agricultural production efficiency.

[0022] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent agricultural fertilization and irrigation device, comprising a water-fertilizer machine body (1) and a mixing box (2) arranged inside the water-fertilizer machine body (1), characterized in that: It also comprises a fertilizer outlet pipe (3) fixedly connected to the mixing box (2), the end of the fertilizer outlet pipe (3) away from the mixing box (2) passing through the side wall of the water fertilizer machine body (1), a conical filter (4) fixedly mounted on the inner side wall of the fertilizer outlet pipe (3), a fixing ring (41) rotatably mounted on the top of the conical filter (4), and two scrapers (42) symmetrically fixedly mounted at both ends of the fixing ring (41) and in contact with the outer surface of the conical filter (4) for scraping off impurities accumulated on the surface of the conical filter (4); A cylinder (5) is fixedly mounted on the outside of the water fertilizer machine body (1), a piston (6) is slidably mounted inside the cylinder (5), a piston rod (7) is fixedly mounted on the top of the piston (6), one end of the piston rod (7) away from the piston (6) penetrates the top wall of the cylinder (5) in an airtight manner, a spring (8) is sleeved on the outside of the piston rod (7), and the two ends of the spring (8) are respectively fixedly connected to the top of the piston (6) and the inner top wall of the cylinder (5), and a liquid inlet pipe (9) and a liquid outlet pipe (10) are fixedly connected to the outside of the bottom end of the cylinder (5), and the diameter of the liquid inlet pipe (9) is larger than the diameter of the liquid outlet pipe (10). The fertilizer machine body (1) has a diameter of 1.5 mm, and the ends of the liquid inlet pipe (9) and the liquid outlet pipe (10) away from the cylinder body (5) are fixedly connected to the fertilizer outlet pipe (3). A connecting plate (11) is fixedly installed on the top of the piston rod (7). A slide groove (12) is provided on the outer wall of the water fertilizer machine body (1) on the side close to the piston rod (7). The end of the connecting plate (11) close to the water fertilizer machine body (1) is slidably connected to the slide groove (12). A pressure sensor (13) is fixedly installed on the inner top wall of the slide groove (12). The pressure sensor (13) is electrically connected to a controller inside the water fertilizer machine body (1). The controller is drivingly connected to the fixing ring (41).

2. The intelligent agricultural fertilization and irrigation device according to claim 1, characterized in that: The fixed connection point between the liquid inlet pipe (9) and the fertilizer outlet pipe (3) is close to the outside of the water fertilizer machine body (1), and the fixed connection point between the liquid outlet pipe (10) and the fertilizer outlet pipe (3) is far from the outside of the water fertilizer machine body (1).

3. The intelligent agricultural fertilization and irrigation device according to claim 2, characterized in that: An installation box (14) is fixedly mounted on the outer side of the fertilizer outlet pipe (3); a motor (15) is fixedly mounted on the inner bottom wall of the installation box (14); the pressure sensor (13) is electrically connected to the motor (15); a rotating shaft (16) is fixedly mounted on the output end of the motor (15); a main gear (17) is fixedly mounted on the top of the rotating shaft (16); and the main gear (17) is drivingly connected to a fixing ring (41).

4. The intelligent agricultural fertilization and irrigation device according to claim 3, characterized in that: Two connecting rods (18) are symmetrically fixedly mounted at both ends of the fixing ring (41), and a slave gear (19) meshing with the main gear (17) is fixedly mounted at the top ends of the two connecting rods (18).

5. The intelligent agricultural fertilization and irrigation device according to claim 4, characterized in that: A mounting groove (20) adapted to the slave gear (19) is provided inside the side wall of the fertilizer outlet pipe (3) to provide a movable space for the operation of the slave gear (19); and a movable groove (21) connected to the mounting groove (20) is provided on the inner side wall of the fertilizer outlet pipe (3) to provide a movable space for the operation of the connecting rod (18).

6. The intelligent agricultural fertilization and irrigation device according to claim 1, characterized in that: The outer side of the fertilizer outlet pipe (3) is provided with a slag discharge port (22), and the slag discharge port (22) is placed at the bottom end of the conical filter screen (4). A storage box (23) is slidably mounted on the outer side of the water fertilizer machine body (1), and one end of the storage box (23) close to the inside of the water fertilizer machine body (1) is in contact with the outer side wall of the fertilizer outlet pipe (3), and the top wall of the storage box (23) and the inner bottom wall of the slag discharge port (22) are placed on the same horizontal plane.

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