Precise water and fertilizer integrated intelligent device and method for drip irrigation of corn and wheat

Abstract

The invention discloses a corn and wheat drip irrigation precise water and fertilizer integrated intelligent device and method.The device comprises a box body, a box cover is installed on the box body, a feeding pipe is installed at the upper end, close to the box cover, of the box body, a servo motor is installed at the upper end of the box cover, and the output end of the servo motor drives a rotating rod; the rotating rod penetrates through the box cover and is rotationally connected with the box cover, a cross rod is fixedly connected to the outer wall of the rotating rod, two rectangular frame stirring plates are fixedly connected to the bottom of the cross rod, a net plate located below the rectangular frame stirring plates is slidably connected to the inner wall of the box body, and a threaded cylinder is fixedly connected to the net plate; a threaded rod is in threaded connection with the interior of the threaded cylinder, and a circular groove is formed in the upper end of the threaded rod. By means of the servo motor, water and fertilizer can be mixed, the mixing effect is good, it can be guaranteed that corn grows uniformly, meanwhile, the amount of water and fertilizer dripped to corn can be controlled, and different amounts of water and fertilizer are dripped according to different corns.

Description

Technical Field

[0001] The present invention relates to the technical field of corn, and in particular to an intelligent device and method for precise water-fertilizer integration for corn and wheat drip irrigation. Background Art

[0002] As the shortage of agricultural water resources in the future increases and the requirements for the quality of the agricultural ecological environment increase, corn production must explore an irrigation and fertilization model that saves water and fertilizer and is efficient. Drip irrigation, as an irrigation method that efficiently utilizes water and fertilizer, can supply water and nutrients in a timely and quantitative manner according to the needs of crops at different growth stages, achieving the comprehensive effects of water saving, high quality and high yield.

[0003] Before drip irrigation of corn, it is very important to mix water and fertilizer. Ensuring the uniformity of water and fertilizer can ensure the uniformity of corn after fertilization;

[0004] The prior art discloses an automatic precision water and fertilizer irrigation system with application number CN201821021283.8, which detects the temperature, humidity and fertility of the soil by setting a sensor device, and the control device automatically mixes water and fertilizer according to the detection data to achieve precise control of the amount of water and fertilizer. By setting a U-shaped return pipe on the branch water pipe, the flow rate of drip irrigation can be controlled in conjunction with the flow valve set on the branch water pipe, and the filter device set on the U-shaped return pipe can filter impurities entering the pipe to avoid pipe blockage. The utility model has a high degree of automation, which can save manpower and improve the utilization rate of water resources and fertilizers; although the patent is provided with a mixing tank, it cannot effectively mix water and fertilizer, resulting in uneven water and fertilizer;

[0005] Secondly, the prior art discloses a water-fertilizer integrated precision irrigation device with application number CN201921324150.2. The device has a simple structure and is easy to use, which reduces the workload of crop growers. It combines irrigation and fertilization into one, and can irrigate and fertilize crops at the same time, or irrigate crops separately. There is no need to judge the amount of fertilizer and irrigation based on the experience of the growers, so as to achieve precise fertilization and irrigation, save resources, reduce costs, improve crop growth, and increase crop yields. It effectively solves the problem mentioned in the background technology: Nowadays, in agricultural production, crop irrigation and fertilization are generally carried out separately, and irrigation adopts drip irrigation and sprinkler irrigation. However, fertilization is mostly determined based on the planting experience of the growers, which can easily cause waste of resources and insufficient or excessive fertilization, high crop planting costs, and even affect crop growth and crop yields. The disclosed patent not only has a poor effect on water-fertilizer mixing, but also has a low injection efficiency for water and fertilizer, which reduces the effect of actual use.

[0006] To this end, we designed an intelligent device for corn drip irrigation with precise water and fertilizer integration. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an intelligent device for corn drip irrigation with precise water and fertilizer integration.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] The invention discloses an intelligent device for integrating precision water and fertilizer for corn drip irrigation, comprising a box body, a box cover being installed on the box body, a feed pipe being installed on the upper end of the box body near the box cover, a servo motor being installed on the upper end of the box cover, a rotating rod being driven by the output end of the servo motor, the rotating rod passing through the box cover and being rotatably connected thereto, a cross bar being fixedly connected to the outer wall of the rotating rod, two rectangular frame stirring plates being fixedly connected to the bottom of the cross bar, a mesh plate being slidably connected to the inner wall of the box body and being located below the rectangular frame stirring plates, a threaded barrel being fixedly connected to the mesh plate, a screw being threadedly connected to the inner thread of the threaded barrel, a circular groove being provided at the upper end of the screw, the rotating rod extending into the circular groove, and the Two limiting mechanisms are arranged between the rotating rod and the circular groove, the outer sleeve of the screw rod is provided with a U-shaped plate rotatably connected thereto, the U-shaped plate penetrates the mesh plate and is slidably connected thereto, the bottom of the U-shaped plate is fixedly connected to the bottom of the box body, the bottom of the box body penetrates four delivery pipes fixedly connected thereto, a one-way valve is installed on each of the four delivery pipes, an injection head is installed at the bottom of each of the four delivery pipes, a soil water potential sensor is installed on each of the four injection heads, an adjustable equal-volume drip irrigation mechanism is arranged between each of the four delivery pipes and the mesh plate, a control system is installed at the upper end of the box body, and a control panel electrically connected to the control system is installed at one side of the box body.

[0010] Preferably, the inner wall of the rectangular frame stirring plate is fixedly connected with two vertically arranged guide rods, and a plurality of rings are slidably connected to the two guide rods. An inclined plate is fixedly connected between the two horizontally opposite rings, and limit blocks are provided between the vertically adjacent rings, and the limit blocks are fixed on the guide rods.

[0011] Preferably, the limiting mechanism includes an installation groove arranged on the rotating rod, a magnetic block is slidably connected in the installation groove, an electromagnet is fixedly connected in the installation groove, a spring is fixedly connected between the electromagnet and the magnetic block, a clamping block is fixedly connected to the side of the magnetic block opposite to the electromagnet, and a clamping groove is provided on the inner wall of the circular groove, and the clamping block extends into the clamping groove.

[0012] Preferably, the magnetic poles of the side of the magnetic block facing the electromagnet are opposite in polarity.

[0013] Preferably, the equal-volume drip irrigation mechanism includes a piston cylinder fixed at the bottom of the box body, a piston is slidably connected inside the piston cylinder, an electric push rod is fixedly connected to the bottom of the mesh plate, the output end of the electric push rod is fixedly connected to the upper end of the piston, a short tube is fixedly connected through the side wall of the piston cylinder, and an electromagnetic one-way valve is installed on the short tube.

[0014] Preferably, a water outlet pipe is installed through the lower end of one side of the box body, and a manual valve is installed on the water outlet pipe.

[0015] Preferably, the control system is electrically connected to the electric push rod, the soil water potential sensor and the electromagnet.

[0016] Preferably, the one-way valve is a water outlet one-way valve.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The servo motor drives the rotating rod and the crossbar to rotate, thereby realizing the rotation of the two rectangular frame stirring plates. The rotation of the rectangular frame stirring plates will stir the water and fertilizer, and can mix the water and fertilizer. Since the sleeve ring can slide up and down on the guide rod, the inclined plate rotates driven by the rectangular frame stirring plate. Under the impact of the liquid, the inclined plate can move up and down, so that the water and fertilizer can be mixed more effectively and more fully.

[0019] 2. The control system controls the electromagnet to work. When the electromagnet is powered off, the card block can be inserted into the card slot under the action of the spring, so that the rotating rod can be connected to the screw and drive the screw to rotate. The rotation of the screw can realize the upward movement of the threaded barrel and the mesh plate, thereby realizing multiple electric push rods and pistons. The upward movement of the piston can generate negative pressure in the piston barrel, and the water and fertilizer in the box can be transported to the piston barrel through the short tube. Then the control system controls the servo motor to reverse, so that the mesh plate and the piston can move downward, thereby squeezing the water and fertilizer in the piston barrel into the delivery pipe, and drip irrigating it into the soil through the injection head, thereby realizing drip irrigation of corn.

[0020] 3. When the soil water potential sensor detects changes in the water potential in the soil, the soil water potential sensor will transmit a signal to the control system. The control system controls the electric push rod and the electromagnetic one-way valve to work. The electromagnetic one-way valve opens. When the mesh plate moves upward, it will drive the electric push rod and the piston to move upward. In this way, the water and fertilizer in the box can be sucked into the piston cylinder through the short tube. The soil water potential sensor controls the electric push rod to work according to the changes in the soil water potential. If the soil water potential is low, the electric push rod drives the piston to move upward to increase the amount of water and fertilizer in the piston cylinder. On the contrary, the piston moves downward and the amount of water and fertilizer in the piston cylinder decreases. In this way, the amount of water and fertilizer in the piston cylinder can be accurately controlled with high accuracy and more water and fertilizer saving.

[0021] In summary, the present invention can not only achieve the mixing of water and fertilizer through the servo motor, but also has a good mixing effect, thereby ensuring the uniform growth of corn. At the same time, it can also control the amount of water and fertilizer for corn drip irrigation, and drip irrigation can be different according to different corns. The amount of water and fertilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of the intelligent device for precise water and fertilizer integration of corn drip irrigation proposed by the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the limiting mechanism in the intelligent device for precise water and fertilizer integration of corn drip irrigation proposed by the present invention;

[0024] Figure 3 This is a structural schematic diagram of a rectangular frame stirring plate in the intelligent device for precise water and fertilizer integration of corn drip irrigation proposed by the present invention;

[0025] Figure 4 It is a side view of the inclined plate in the intelligent device for precise water and fertilizer integration of corn drip irrigation proposed by the present invention;

[0026] Figure 5 This is a block diagram of the intelligent device for precise water and fertilizer integration for corn drip irrigation proposed in the present invention.

[0027] In the figure: 1 box body, 2 servo motor, 3 rotating rod, 4 box cover, 5 inclined plate, 6 feeding pipe, 7 control panel, 8 mesh plate, 9 cross bar, 10 rectangular frame stirring plate, 11 control system, 12 water outlet pipe, 13 manual valve, 14 threaded cylinder, 15 U-shaped plate, 16 screw, 17 piston cylinder, 18 electric push rod, 19 piston, 20 delivery pipe, 21 collar, 22 short pipe, 23 electromagnetic one-way valve, 24 one-way valve, 25 injection head, 26 soil water potential sensor, 27 circular groove, 28 electromagnet, 29 spring, 30 magnetic block, 31 card block, 32 card slot, 33 installation slot, 34 limit block, 35 guide rod, 36 first gear, 37 second gear. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Reference Figure 1-5, a corn drip irrigation precision water and fertilizer integrated intelligent device includes a box body 1, wherein it should be noted that a lifting and moving mechanism is installed at the bottom of the box body 1, which can be electric. When the box body 1 moves to the moving position, the box body 1 moves downward to insert the soil water potential sensor 26 into the soil layer for detection. After the detection, different capacities of water and fertilizer are injected according to the soil moisture; then, the box body 1 is moved again for water and fertilizer drip irrigation, wherein the lifting and moving mechanism is a prior art, the lifting can be achieved by hydraulic pressure, and the movement can be achieved by electric wheels; the soil water potential sensor 26 is a prior art, and the principle is that when the soil becomes dry and contacts the ceramic head, the humidity surface tension potential tends to absorb the moisture in the tube, thereby forming a local vacuum at the top of the tube. After irrigation or rainfall, the moisture is sucked back into the tube to reduce the vacuum degree. A high vacuum value reading indicates that the soil is dry, and a low reading indicates that the soil is moist.

[0030] A box cover 4 is installed on the box body 1, and the box cover 4 is connected to the box body 1 by bolts; a feed pipe 6 is installed at the upper end of the box body 1 close to the box cover 4, and a servo motor 2 is installed on the upper end of the box cover 4. The output end of the servo motor 2 drives a rotating rod 3, and a first gear 36 is fixed to the output end of the servo motor 2. A second gear 37 is fixed to the rotating rod 3, and the first gear 36 and the second gear 37 are meshed; the rotating rod 3 passes through the box cover 4 and is rotatably connected thereto, and bearings are installed above and below the box cover 4, and the rotating rod 3 passes through the inner ring of the bearing and is fixedly connected thereto.

[0031] The outer wall of the rotating rod 3 is fixedly connected with a cross bar 9, and the bottom of the cross bar 9 is fixedly connected with two rectangular frame stirring plates 10. The inner wall of the rectangular frame stirring plate 10 is fixedly connected with two vertically arranged guide rods 35. A polyfluoro film can be sleeved on the outer wall of the guide rod 35, so that the friction between the collar 21 and the guide rod 35 can be reduced, so that the collar 21 slides more smoothly, so that the inclined plate 5 can move up and down more smoothly, which is more conducive to mixing water and fertilizer; a plurality of collars 21 are slidably connected to the two guide rods 35, and an inclined plate 5 is fixedly connected between the two horizontally opposite collars 21. The upper end of the inclined plate 5 is arranged in an inclined surface, so that the resistance when the water and fertilizer pass through the upper end of the inclined plate 5 is reduced, and the collision with the inclined plate 5 can be reduced. The plate 5 plays a certain protective role; a limit block 34 is provided between vertically adjacent measuring collars 21, and the limit block 34 is fixed on the guide rod 35; wherein, the collar 21 can slide up and down on the guide rod 35, so the inclined plate 5 rotates driven by the rectangular frame stirring plate 10, and the rectangular frame stirring plate 10 rotates, which will cause the water and fertilizer to form a vortex. Due to the obstruction of the piston cylinder 17 and the mesh plate 8 arranged at the bottom of the box body 1 and the change of the flow direction of the water and fertilizer after passing through the inclined plate 5, the formed vortex is unstable, so the flow velocity difference between the upper and lower sides of the inclined plate 5 is also unstable, so that the inclined plate 5 can be moved up and down; the inclined plate 5 can be moved up and down by the impact of the liquid, and the adjacent inclined plates 5 are prevented from colliding by setting the limit block 34.

[0032] Among them, the principle of the up and down movement of the inclined plate 5 is that when the water flows through the inclined surface of the lower surface of the inclined plate 5, it will have a certain flow velocity. Since the upper end surface of the inclined plate 5 partially blocks the water flow, the water flow velocity of the inclined surface of the upper surface of the inclined plate 5 is less than the water flow velocity of the inclined surface of the lower surface of the inclined plate 5. In this way, there is a certain flow velocity difference between the upper and lower surfaces of the inclined plate 5. According to the Bernoulli principle, the inclined plate 5 will move upward. Since the inclined plate 5 has a certain weight, when the flow velocity difference decreases, the inclined plate 5 will move downward. In this way, the inclined plate 5 will move up and down.

[0033] The inner wall of the box body 1 is slidably connected with a mesh plate 8 located below the rectangular frame stirring plate 10. The mesh plate 8 is made of stainless steel, has good corrosion resistance and a longer service life. A threaded barrel 14 is fixedly connected to the mesh plate 8, and a screw 16 is connected to the inner thread of the threaded barrel 14. A circular groove 27 is provided at the upper end of the screw 16. The rotating rod 3 extends into the circular groove 27. The rotating rod 3 can be rotatably connected to the inner wall of the circular groove 27 through a bearing. Among them, the screw 16 can be replaced with a reciprocating screw, and the corresponding threaded barrel 14 cooperates with the reciprocating screw, so that the mesh plate 8 is driven to move downward and then upward without changing the rotation direction of the servo motor 2.

[0034] Two limiting mechanisms are provided between the rotating rod 3 and the circular groove 27, and the limiting mechanisms include a mounting groove 33 provided on the rotating rod 3, a magnetic block 30 is slidably connected in the mounting groove 33, an electromagnet 28 is fixedly connected in the mounting groove 33, a spring 29 is fixedly connected between the electromagnet 28 and the magnetic block 30, a clamping block 31 is fixedly connected to the side of the magnetic block 30 opposite to the electromagnet 28, a clamping groove 32 is provided on the inner wall of the circular groove 27, and the clamping block 31 extends into the clamping groove 32; wherein, the magnetic poles of the side opposite to the electromagnet 28 are opposite, that is, when the electromagnet 28 is energized, the magnetic block 30 and the electromagnet 28 are attracted to each other, so that the clamping block 31 can be separated from the clamping groove 32.

[0035] Among them, the electromagnet 28 can be powered by a conductive slip ring. The main function of the conductive slip ring is to solve the problem of wire entanglement during the 360-degree rotation of the equipment. During the electrical design process, the wires need to be connected to the rotating parts. When the mechanical part rotates 360 degrees continuously without limit, the wire entanglement problem will be encountered. In order to ensure that the current or signal can be accurately transmitted to the rotating parts, an electric rotary connector, commonly known as an "electric slip ring", is required to transmit the rotational connection of power and signals. The existence of the conductive slip ring can greatly simplify the system structure and avoid damage to the wires during rotation.

[0036] The outer sleeve of the screw rod 16 is provided with a U-shaped plate 15 rotatably connected thereto, the upper section of the screw rod 16 is a round rod, the outer sleeve of the round rod is provided with a bearing fixedly connected thereto, the U-shaped plate 15 is fixedly connected to the outer ring of the bearing, and the model of the bearing can be selected according to actual use; the U-shaped plate 15 passes through the mesh plate 8 and is slidably connected thereto, the bottom of the U-shaped plate 15 is fixedly connected to the bottom of the box body 1, and the bottom of the box body 1 is penetrated by four delivery pipes 20 fixedly connected thereto, wherein the delivery pipes 20 are not limited to four; a one-way valve 24 is installed on each of the four delivery pipes 20, an injection head 25 is installed at the bottom of each of the four delivery pipes 20, and a soil water potential sensor 26 is installed on each of the four injection heads 25.

[0037] An adjustable equal-volume drip irrigation mechanism is provided between the four delivery pipes 20 and the mesh plate 8. The equal-volume drip irrigation mechanism includes a piston cylinder 17 fixed to the bottom of the box body 1, a piston 19 is slidably connected in the piston cylinder 17, an electric push rod 18 is fixedly connected to the bottom of the mesh plate 8, the output end of the electric push rod 18 is fixedly connected to the upper end of the piston 19, a short tube 22 is fixedly connected through the side wall of the piston cylinder 17, and an electromagnetic one-way valve 23 is installed on the short tube 22; wherein, the one-way valve 24 is a water outlet one-way valve, and when there is water and fertilizer in the piston cylinder 17, the one-way valve 24 will not open, and the piston 19 needs to move downward to increase the pressure in the piston cylinder 17, and the one-way valve 24 will open.

[0038] A water outlet pipe 12 is installed through the lower end of one side of the box body 1 , and a manual valve 13 is installed on the water outlet pipe 12 to facilitate the discharge of water in the box body 1 .

[0039] A control system 11 is installed at the upper end of the box 1 , and the control system 11 is electrically connected to the electric push rod 18 , the soil water potential sensor 26 and the electromagnet 28 . A control panel 7 electrically connected to the control system 11 is installed on one side of the box 1 .

[0040] When the present invention is used, the staff can add water and fertilizer into the box body 1 through the feed pipe 6, and then start the servo motor 2;

[0041] The servo motor 2 drives the rotating rod 3 and the crossbar 9 to rotate, thereby realizing the rotation of the two rectangular frame stirring plates 10. The rotation of the rectangular frame stirring plates 10 will stir the water and fertilizer, and the water and fertilizer can be mixed. Since the collar 21 can slide up and down on the guide rod 35, the inclined plate 5 rotates driven by the rectangular frame stirring plate 10. Under the impact of the liquid, the inclined plate 5 can move up and down, so that the water and fertilizer can be mixed more effectively and more fully.

[0042] When the soil water potential sensor 26 detects a change in the water potential in the soil, the soil water potential sensor 26 transmits a signal to the control system 11. The control system 11 controls the electric push rod 18 and the electromagnetic one-way valve 23 to work, and the electromagnetic one-way valve 23 opens. When the mesh plate 8 moves upward, it drives the electric push rod 18 and the piston 19 to move upward, so that the water and fertilizer in the box body 1 can be sucked into the piston cylinder 17 through the short tube 22. The soil water potential sensor 26 controls the electric push rod 18 to work according to the change in the water potential of the soil. If the soil water potential is low, the electric push rod 18 drives the piston 19 to move upward to increase the amount of water and fertilizer in the piston cylinder 17. On the contrary, the piston 19 moves downward, and the amount of water and fertilizer in the piston cylinder 17 is reduced. In this way, the amount of water and fertilizer in the piston cylinder 17 can be accurately controlled, with high accuracy and more water and fertilizer saving. After the electric push rod 18 finishes moving, the electric push rod 18 and the electromagnetic one-way valve 23 are closed;

[0043] At the same time, the control system 11 controls the electromagnet 28 to work, and the electromagnet 28 is powered off. Under the action of the spring 29, the magnetic block 30 and the card block 31 can move. When the card block 31 that rotates with the rotating rod 3 is opposite to the card slot 32, under the action of the spring 29, the card block 31 can be stuck in the card slot 32, so that the rotating rod 3 can be connected with the screw 16 and drive the screw 16 to rotate. The rotation of the screw 16 can realize the upward movement of the threaded cylinder 14 and the mesh plate 8, and then realize multiple electric push rods 18 and pistons 19. The upward movement of the piston 19 can generate negative pressure in the piston cylinder 17, and the water and fertilizer in the box body 1 can be transported to the piston cylinder 17 through the short tube 22. Then the control system 11 controls the servo motor 2 to reverse, which can realize the downward movement of the mesh plate 8 and the piston 19, so that the water and fertilizer in the piston cylinder 17 can be squeezed into the delivery pipe 20, and drip irrigated in the soil through the injection head 25, so as to realize drip irrigation of corn;

[0044] After the drip irrigation is finished, the control system 11 controls the electromagnet 28 to work, so that the magnetic block 30 and the electromagnet 28 are attracted to each other, and the clamping block 31 is separated from the clamping slot 32 .

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A corn and wheat drip irrigation precision water and fertilizer integrated intelligent device and method, comprising a box (1), characterized in that: A box cover (4) is installed on the box body (1), a feed pipe (6) is installed at the upper end of the box body (1) close to the box cover (4), a servo motor (2) is installed on the upper end of the box cover (4), the output end of the servo motor (2) drives a rotating rod (3), the rotating rod (3) passes through the box cover (4) and is rotatably connected thereto, the outer wall of the rotating rod (3) is fixedly connected to a cross bar (9), the bottom of the cross bar (9) is fixedly connected to two rectangular frame stirring plates (10), the inner wall of the box body (1) is slidably connected to a mesh plate (8) located below the rectangular frame stirring plates (10), the mesh plate (8) is fixedly connected to a threaded barrel (14), the inner thread of the threaded barrel (14) is connected to a screw rod (16), the upper end of the screw rod (16) is provided with a circular groove (27), the rotating rod (3) extends into the circular groove (27), and the rotating rod (3) is connected to the circular groove (27). Two limiting mechanisms are arranged between the grooves (27); the outer sleeve of the screw rod (16) is provided with a U-shaped plate (15) rotatably connected thereto; the U-shaped plate (15) penetrates the mesh plate (8) and is slidably connected thereto; the bottom of the U-shaped plate (15) is fixedly connected to the bottom of the box body (1); the bottom of the box body (1) is penetrated by four delivery pipes (20) fixedly connected thereto; a one-way valve (24) is installed on each of the four delivery pipes (20); an injection head (25) is installed at the bottom of each of the four delivery pipes (20); a soil water potential sensor (26) is installed on each of the four injection heads (25); an adjustable equal-volume drip irrigation mechanism is arranged between each of the four delivery pipes (20) and the mesh plate (8); a control system (11) is installed at the upper end of the box body (1); and a control panel (7) electrically connected to the control system (11) is installed on one side of the box body (1).

2. The corn drip irrigation precision water and fertilizer integrated intelligent device according to claim 1, characterized in that: The inner wall of the rectangular stirring plate (10) is fixedly connected to two vertically arranged guide rods (35), and a plurality of collars (21) are slidably connected to the two guide rods (35). An inclined plate (5) is fixedly connected between two horizontally opposite collars (21), and a limit block (34) is provided between the vertically adjacent collars (21), and the limit block (34) is fixed on the guide rod (35).

3. The corn drip irrigation precision water and fertilizer integrated intelligent device according to claim 1, characterized in that: The limiting mechanism comprises a mounting groove (33) arranged on the rotating rod (3), a magnetic block (30) is slidably connected in the mounting groove (33), an electromagnet (28) is fixedly connected in the mounting groove (33), a spring (29) is fixedly connected between the electromagnet (28) and the magnetic block (30), a clamping block (31) is fixedly connected to the side of the magnetic block (30) opposite to the electromagnet (28), a clamping groove (32) is provided on the inner wall of the circular groove (27), and the clamping block (31) extends into the clamping groove (32).

4. The corn drip irrigation precision water and fertilizer integrated intelligent device according to claim 3, characterized in that: The magnetic poles of the side of the magnetic block (30) facing the electromagnet (28) are opposite in polarity.

5. The corn drip irrigation precision water and fertilizer integrated intelligent device according to claim 1, characterized in that: The equal-volume drip irrigation mechanism comprises a piston cylinder (17) fixed at the bottom of a box body (1), a piston (19) being slidably connected inside the piston cylinder (17), an electric push rod (18) being fixedly connected to the bottom of the mesh plate (8), an output end of the electric push rod (18) being fixedly connected to the upper end of the piston (19), a short tube (22) being fixedly connected through the side wall of the piston cylinder (17), and an electromagnetic one-way valve (23) being installed on the short tube (22).

6. The corn drip irrigation precision water and fertilizer integrated intelligent device according to claim 1, characterized in that: A water outlet pipe (12) is installed through the lower end of one side of the box body (1), and a manual valve (13) is installed on the water outlet pipe (12).

7. The corn drip irrigation precision water and fertilizer integrated intelligent device according to claim 1, characterized in that: The control system (11) is electrically connected to the electric push rod (18), the soil water potential sensor (26) and the electromagnet (28).

8. The corn drip irrigation precision water and fertilizer integrated intelligent device according to claim 5, characterized in that: The one-way valve (24) is a water outlet one-way valve.

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