阅读说明：本技术 玉米滴灌精准水肥一体化智能化装置 (Accurate water and fertilizer integrated intelligent device for corn drip irrigation ) 是由 范秀艳 杨恒山 张玉芹 张瑞富 李维敏 于 2021-10-09 设计创作，主要内容包括：本发明公开了玉米滴灌精准水肥一体化智能化装置,包括箱体,所述箱体上安装有箱盖,所述箱体靠近箱盖的上端安装有进料管,所述箱盖的上端安装有伺服电机,所述伺服电机的输出端驱动有转动杆,所述转动杆贯穿箱盖并与其转动连接,所述转动杆的外壁固定连接有横杆,所述横杆的底部固定连接有两个矩形框搅拌板,所述箱体的内壁滑动连接有位于矩形框搅拌板下方的网板,所述网板上固定连接有螺纹筒,所述螺纹筒内螺纹连接有螺杆,所述螺杆的上端设有圆形槽。本发明通过伺服电机不仅可以实现对水肥的混合,且混合效果较好,从而可以保证玉米生长均匀,同时,也可以控制对玉米滴灌的水肥量,且根据不同的玉米滴灌不同的水肥量。(The invention discloses an accurate water and fertilizer integrated intelligent device for corn drip irrigation, which comprises a box body, wherein a box cover is arranged on the box body, a feeding pipe is arranged at the upper end, close to the box cover, of the box body, a servo motor is arranged at the upper end of the box cover, the output end of the servo motor drives a rotating rod, the rotating rod penetrates through the box cover and is in rotating connection 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 screen plate positioned below the rectangular frame stirring plates is connected to the inner wall of the box body in a sliding mode, a threaded cylinder is fixedly connected to the screen plate, a screw rod is connected to the threaded cylinder in a threaded mode, and a circular groove is formed in the upper end of the screw rod. According to the invention, the water and fertilizer can be mixed through the servo motor, the mixing effect is good, so that the uniform growth of the corn can be ensured, meanwhile, the water and fertilizer amount of the corn drop irrigation can be controlled, and different water and fertilizer amounts are drop-irrigated according to different corns.)

1. Accurate liquid manure integration intelligent device is driped irrigation to maize, including box (1), its characterized in that, install case lid (4) on box (1), inlet pipe (6) are installed to the upper end that box (1) is close to case lid (4), servo motor (2) are installed to the upper end of case lid (4), the output drive of servo motor (2) has dwang (3), dwang (3) run through case lid (4) and rather than rotate the connection, the outer wall fixedly connected with horizontal pole (9) of dwang (3), two rectangle frame agitator plates (10) of bottom fixedly connected with of horizontal pole (9), the inner wall sliding connection of box (1) has otter board (8) that are located rectangle frame agitator plate (10) below, fixedly connected with screw thread section of thick bamboo (14) on otter board (8), screw thread section of thick bamboo (14) female connection has screw rod (16), the upper end of screw rod (16) is equipped with circular recess (27), dwang (3) extend to in circular recess (27), just be equipped with two stop gear between dwang (3) and circular recess (27), the outside cover of screw rod (16) is equipped with rather than rotating U template (15) of being connected, U template (15) run through otter board (8) and rather than sliding connection, the bottom of U template (15) and the bottom fixed connection of box (1), the bottom of box (1) runs through four conveyer pipes (20) rather than fixed connection, four all install check valve (24) on conveyer pipe (20), four injection head (25) are all installed to the bottom of conveyer pipe (20), four all install soil water potential sensor (26) on injection head (25), four all be equipped with adjustable equivalent mechanism between conveyer pipe (20) and otter board (8), control system (11) are installed to the upper end of box (1), just control panel (7) with control system (11) electric connection are installed to one side of box (1).

2. The intelligent corn drip irrigation precision water and fertilizer integrated device according to claim 1, wherein two vertically arranged guide rods (35) are fixedly connected to the inner wall of the rectangular frame stirring plate (10), a plurality of lantern rings (21) are slidably connected to the two guide rods (35), inclined plates (5) are fixedly connected between the two horizontally opposite lantern rings (21), limit blocks (34) are arranged between the vertically adjacent lantern rings (21), and the limit blocks (34) are fixed to the guide rods (35).

3. The corn drip irrigation precision water and fertilizer integration intelligent device according to claim 1, wherein the limiting mechanism comprises a mounting groove (33) arranged on the rotating rod (3), a magnetic block (30) is connected in the mounting groove (33) in a sliding manner, 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 one side of the magnetic block (30) opposite to the electromagnet (28), a clamping groove (32) is arranged on the inner wall of the circular groove (27), and the clamping block (31) extends into the clamping groove (32).

4. The precise water and fertilizer integrated intelligent device for corn drip irrigation according to claim 3, wherein the magnetic pole of the surface of the magnetic block (30) opposite to the electromagnet (28) is opposite in polarity.

5. The corn drip irrigation precision water and fertilizer integrated intelligent device according to claim 1, wherein the equivalent drip irrigation mechanism comprises a piston cylinder (17) fixed at 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 screen plate (8), the output end of the electric push rod (18) is fixedly connected with the upper end of the piston (19), a short pipe (22) is fixedly connected to the side wall of the piston cylinder (17) in a penetrating manner, and an electromagnetic one-way valve (23) is installed on the short pipe (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) penetrates through the lower end of one side of the box body (1), and a manual valve (13) is mounted on the water outlet pipe (12).

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

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

Technical Field

The invention relates to the technical field of corns, in particular to an accurate water and fertilizer integrated intelligent device for corn drip irrigation.

Background

With the increasing shortage of agricultural water resources and the improvement of the quality requirement on agricultural ecological environment in the future, a water-saving fertilizer-saving efficient irrigation and fertilization mode must be explored in corn production, and drip irrigation as an irrigation mode for efficiently utilizing water and fertilizer can regularly and quantitatively supply water and nutrients according to the requirements of crops in different growth periods, so that the comprehensive effects of water saving, high quality and high yield are achieved.

Before the corn is subjected to drip irrigation, the mixing of water and fertilizer is crucial, and the uniformity of the water and fertilizer can be ensured, so that the uniformity of the corn after fertilization can be ensured;

the prior art discloses an automatic accurate liquid manure irrigation system of application number CN201821021283.8, and it detects temperature, humidity and fertility of soil through setting up sensing device, and controlling means realizes accurate control water yield and fertile volume according to automatic ratio water and fertilizer of detection data. Through set up U type back flow on a water pipe, the steerable flow of driping irrigation of flow valve that the cooperation set up on a water pipe, and the filter equipment of setting on U type back flow can filter the impurity that gets into the pipeline, avoids the pipeline to block up. The utility model has high automation degree, can save manpower and improve the utilization rate of water resources and fertilizers; although the water mixing tank is arranged in the patent, the water and the fertilizer cannot be effectively mixed, so that the water and the fertilizer are uneven;

secondly, prior art discloses a water and fertilizer integration accurate irrigation equipment that application number is CN201921324150.2, a structure is simple, high durability and convenient use, crop planting personnel's work load has been reduced, irrigate and fertilize as an organic whole, can be simultaneously for crop irrigation fertilization, also can irrigate the crop alone, and need not to judge fertilization volume and irrigation volume according to planting personnel's experience, realize that fertilization volume and irrigation volume are accurate, resources are saved, the cost is reduced, the crop growth vigor is good, improve crop output, the effectual background of having solved mentions in the technical: at present, in agricultural production, irrigation and fertilization of crops are generally carried out independently, irrigation adopts a drip irrigation mode and a spray irrigation mode, but most of fertilization is carried out by determining the fertilization amount according to the planting experience of planting personnel, so that resource waste and the situations of insufficient or excessive fertilization are easily caused, the planting cost of the crops is high, and even the growth vigor and the yield of the crops are influenced; the disclosed patent has poor effect on mixing water and fertilizer, has low injection efficiency on the water and fertilizer, and reduces the actual use effect;

therefore, an intelligent device for precisely integrating water and fertilizer for corn drip irrigation is designed.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides an intelligent device for precisely integrating water and fertilizer for corn drip irrigation.

In order to achieve the purpose, the invention adopts the following technical scheme:

the corn drip irrigation precise water and fertilizer integrated intelligent device comprises a box body, wherein a box cover is installed on the box body, an inlet pipe is installed at the upper end of the box body close to the box cover, a servo motor is installed at the upper end of the box cover, the output end of the servo motor is driven to be provided with a rotating rod, the rotating rod penetrates through the box cover and is rotatably connected with the box cover, the outer wall of the rotating rod is fixedly connected with a cross rod, the bottom of the cross rod is fixedly connected with two rectangular frame stirring plates, the inner wall of the box body is slidably connected with a screen plate positioned below the rectangular frame stirring plates, a threaded cylinder is fixedly connected onto the screen plate, a screw rod is in threaded connection with the threaded cylinder, a circular groove is formed in the upper end of the screw rod, the rotating rod extends into the circular groove, two limiting mechanisms are arranged between the rotating rod and the circular groove, and a U-shaped plate which is rotatably connected with the screw rod is sleeved outside the screw rod, the U template runs through the otter board and rather than sliding connection, the bottom of U template and the bottom fixed connection of box, the bottom of box runs through four conveyer pipes that are equipped with rather than fixed connection, four all install the check valve on the conveyer pipe, four the injection head, four are all installed to the bottom of conveyer pipe the overhead soil water potential sensor of all installing of injection, four all be equipped with adjustable equivalent between conveyer pipe and the otter board and drip irrigation the mechanism, control system is installed to the upper end of box, just control panel with control system electric connection is installed to one side of box.

Preferably, the inner wall fixedly connected with of rectangle frame stirring board is vertical two guide bars that set up, two equal sliding connection has a plurality of lantern rings on the guide bar, and the level is relative two fixedly connected with swash plate between the lantern ring, it is vertical adjacent all be equipped with the stopper between the lantern ring, the stopper is fixed on the guide bar.

Preferably, stop gear is including setting up the mounting groove on the dwang, sliding connection has the magnetic path in the mounting groove, fixedly connected with electro-magnet in the mounting groove, fixedly connected with spring between electro-magnet and the magnetic path, the one side fixedly connected with fixture block that the magnetic path carried on the back with the electro-magnet mutually, the inner wall of circular recess is equipped with the draw-in groove, the fixture block extends to in the draw-in groove.

Preferably, the magnetic pole of the side of the magnetic block opposite to the electromagnet is opposite in polarity.

Preferably, the equivalent drip irrigation mechanism comprises a piston cylinder fixed at the bottom of the box body, a piston is connected in the piston cylinder in a sliding mode, the bottom of the screen plate is fixedly connected with an electric push rod, the output end of the electric push rod is fixedly connected with the upper end of the piston, a short pipe fixedly connected with is penetrated through the side wall of the piston cylinder, and an electromagnetic one-way valve is installed on the short pipe.

Preferably, a water outlet pipe penetrates through the lower end of one side of the box body, and a manual valve is mounted on the water outlet pipe.

Preferably, the control system is electrically connected with the electric push rod, the soil water potential sensor and the electromagnet.

Preferably, the check valve is a water outlet check valve.

Compared with the prior art, the invention has the beneficial effects that:

1. servo motor work drives dwang and horizontal pole and rotates, and then realizes that two rectangle frame stirring boards rotate, and rectangle frame stirring board rotates can mix the liquid manure, because the lantern ring can slide about the guide bar, so the swash plate rotates under the drive along with rectangle frame stirring board, through the impact of liquid down, can realize the removal about the swash plate, so can carry out more effectual mixture to the liquid manure for the liquid manure mixes more fully.

2. Control system control electro-magnet work, the electro-magnet outage, under the effect of spring, can make in the fixture block card goes into the draw-in groove, so can link together dwang and screw rod and drive the screw rod and rotate, screw rod rotates and can realize screw thread section of thick bamboo and otter board rebound, and then realize a plurality of electric putter and piston, piston rebound can produce the negative pressure in the piston section of thick bamboo, can pass through the nozzle stub with the liquid manure in the box and carry to the piston section of thick bamboo, control system control servo motor reversal after that, otter board and piston rebound can be realized, thereby can extrude the liquid manure in the piston section of thick bamboo to the conveyer pipe in, and drip irrigation in soil through the injection head, realize driping irrigation to the maize.

3. When soil water potential sensor detects the water potential change in the soil, soil water potential sensor can be with signal transmission to control system, control system control electric putter and electromagnetism check valve work, the electromagnetism check valve is opened, when the otter board upwards removes, can drive electric putter and piston rebound, so can be with the liquid manure in the box in through the nozzle stub suction piston cylinder, soil water potential sensor is according to the water potential change control electric putter work of soil, if soil water potential is low, then electric putter drives piston rebound, increase the liquid manure volume in the piston cylinder, on the contrary, the liquid manure volume in the piston rebound piston cylinder reduces, so the liquid manure volume in the control piston cylinder that can be accurate, the accuracy is high and save liquid manure more.

In conclusion, the invention can realize the mixing of the water and the fertilizer through the servo motor, has better mixing effect, can ensure the uniform growth of the corns, can control the water and fertilizer amount of the drip irrigation on the corns, and can drip irrigation different water and fertilizer amounts according to different corns.

Drawings

FIG. 1 is a schematic structural view of a precise water and fertilizer integrated intelligent corn drip irrigation device provided by the invention;

FIG. 2 is a schematic structural diagram of a limiting mechanism in the precise water and fertilizer integrated intelligent corn drip irrigation device provided by the invention;

FIG. 3 is a schematic structural view of a rectangular frame stirring plate in the precise water and fertilizer integrated intelligent corn drip irrigation device provided by the invention;

FIG. 4 is a side view of the sloping plate in the precision water and fertilizer integrated intelligent corn drip irrigation device provided by the invention;

fig. 5 is a block diagram of the precise water and fertilizer integrated intelligent corn drip irrigation device provided by the invention.

In the figure: the device comprises a box body 1, a servo motor 2, a rotating rod 3, a box cover 4, an inclined plate 5, a feeding pipe 6, a control panel 7, a screen 8, a cross rod 9, a rectangular frame stirring plate 10, a control system 11, a water outlet pipe 12, a manual valve 13, a threaded cylinder 14, a U-shaped plate 15, a screw 16, a piston cylinder 17, an electric push rod 18, a piston 19, a conveying pipe 20, a lantern ring 21, a short pipe 22, an electromagnetic check valve 23, a check valve 24, an injection head 25, a soil water potential sensor 26, a circular groove 27, an electromagnet 28, a spring 29, a magnetic block 30, a clamping block 31, a clamping groove 32, a mounting groove 33, a limiting block 34, a guide rod 35, a first gear 36 and a second gear 37.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, the corn drip irrigation precision water and fertilizer integrated intelligent device comprises a box body 1, wherein it is described that a lifting moving mechanism which can be electric is installed at the bottom of the box body 1, when the box body 1 moves to a moving position, the box body 1 moves downwards to enable a soil water potential sensor 26 to be inserted into a soil layer for detection, and after the detection is finished, water and fertilizer with different capacities are injected according to soil humidity; then, the box body 1 is moved again to carry out water and fertilizer drip irrigation, wherein the lifting moving mechanism is in the prior art, lifting can be realized through hydraulic pressure, and movement can be realized through electric wheels; the soil water potential sensor 26 is prior art, and the principle is that when soil becomes dry, the surface tension potential of the moisture contacted with the ceramic head tends to suck out the water in the pipe, so that partial vacuum is formed at the top of the pipe, when irrigation or rainfall occurs, the water is sucked back into the pipe to reduce the vacuum degree, the high vacuum value reading indicates that the soil is dry, and the low reading indicates that the soil is wet.

A box cover 4 is arranged on the box body 1, and the box cover 4 is connected with the box body 1 through bolts; the feeding pipe 6 is arranged at the upper end, close to the box cover 4, of the box body 1, the servo motor 2 is arranged at the upper end of the box cover 4, the output end of the servo motor 2 drives the rotating rod 3, the first gear 36 is fixed at the output end of the servo motor 2, the second gear 37 is fixed on the rotating rod 3, and the first gear 36 is meshed with the second gear 37; the rotating rod 3 penetrates through the box cover 4 and is rotatably connected with the box cover 4, the bearing is arranged on the upper portion and the lower portion of the box cover 4, and the rotating rod 3 penetrates through the inner ring of the bearing and is fixedly connected with the inner ring.

The outer wall of the rotating rod 3 is fixedly connected with a cross rod 9, the bottom of the cross rod 9 is fixedly connected with two rectangular frame stirring plates 10, the inner wall of each rectangular frame stirring plate 10 is fixedly connected with two guide rods 35 which are vertically arranged, and a tetrafluoride film can be sleeved on the outer wall of each guide rod 35, so that the friction between the lantern ring 21 and the guide rods 35 can be reduced, the lantern ring 21 can slide more smoothly, the inclined plate 5 can move more smoothly up and down, and the mixing of water and fertilizer is facilitated; the two guide rods 35 are connected with the plurality of lantern rings 21 in a sliding mode, the inclined plate 5 is fixedly connected between the two lantern rings 21 which are horizontally opposite, and the upper end of the inclined plate 5 is arranged in an inclined plane mode, so that resistance of liquid manure passing through the upper end of the inclined plate 5 is reduced, impact on the inclined plate 5 is reduced, and a certain protection effect on the inclined plate 5 can be achieved; a limiting block 34 is arranged between the vertically adjacent measuring sleeve rings 21, and the limiting block 34 is fixed on the guide rod 35; the lantern ring 21 can slide up and down on the guide rod 35, so that the inclined plate 5 rotates under the driving of the rectangular frame stirring plate 10, the water and fertilizer can form a vortex when the rectangular frame stirring plate 10 rotates, the formed vortex is unstable due to the blocking of the piston cylinder 17 and the screen plate 8 arranged at the bottom of the box body 1 and the change of the flowing direction of the water and fertilizer after passing through the inclined plate 5, and the flow speed difference between the upper surface and the lower surface of the inclined plate 5 is unstable, so that the inclined plate 5 can move up and down; under the impact of liquid, can realize that swash plate 5 reciprocates, prevent adjacent swash plate 5 from bumping through setting up stopper 34.

Wherein, the principle that swash plate 5 reciprocated, can have certain velocity of flow when rivers pass through the lower surface inclined plane of swash plate 5, because the upper end part of swash plate 5 blocks rivers, then the velocity of flow on the inclined plane of 5 upper surface inclined planes is less than 5 lower surface inclined planes velocity of flow, so there is certain flow difference in 5 upper and lower surfaces of swash plate, according to bernoulli's principle, swash plate 5 can move up, because swash plate 5 has certain weight, when the velocity of flow difference reduces, swash plate 5 can move down, so swash plate 5 can reciprocate.

The inner wall of the box body 1 is connected with a screen plate 8 positioned below the rectangular frame stirring plate 10 in a sliding manner, and the screen plate 8 is made of stainless steel materials, so that the box body has better corrosion resistance and longer service life; the mesh plate 8 is fixedly connected with a threaded cylinder 14, the threaded cylinder 14 is internally threaded with a screw 16, the upper end of the screw 16 is provided with a circular groove 27, the rotating rod 3 extends into the circular groove 27, and the rotating rod 3 can be rotatably connected with the inner wall of the circular groove 27 through a bearing; wherein, the screw 16 can be replaced by a reciprocating screw, and the corresponding thread cylinder 14 is matched with the reciprocating screw, so that the screen plate 8 is driven to move downwards and upwards without changing the rotating direction of the servo motor 2.

Two limiting mechanisms are arranged between the rotating rod 3 and the circular groove 27 and comprise a mounting groove 33 arranged on the rotating rod 3, a magnetic block 30 is connected in the mounting groove 33 in a sliding manner, 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 surface, opposite to the electromagnet 28, of the magnetic block 30, a clamping groove 32 is formed in the inner wall of the circular groove 27, and the clamping block 31 extends into the clamping groove 32; the magnetic pole of the opposite surface of the magnetic block 30 and the electromagnet 28 is opposite, that is, when the electromagnet 28 is energized, the magnetic block 30 and the electromagnet 28 attract each other, so that the fixture block 31 can be separated from the fixture slot 32.

Wherein, electro-magnet 28 can supply power through leading the electrical slip ring, the main effect that leads the electrical slip ring lies in can solving equipment at 360 degrees rotation in-process wire winding problems, in the electrical design process, the wire need be connected to rotary part on, when 360 degrees unlimited continuous rotations of mechanical part, can meet wire winding problems in order to guarantee that electric current or signal can be accurate transmit to rotary part on, need an electric rotatory connector, commonly known as "electrical slip ring" transmits the swivelling joint of power and signal, the existence of leading the electrical slip ring can simplify system architecture greatly, avoid the wire to cause the damage in rotation process.

The U-shaped plate 15 is rotatably connected with the screw 16 in a sleeved mode, the upper section of the screw 16 is a round rod, a bearing fixedly connected with the round rod is sleeved on the outer portion of the round rod, the U-shaped plate 15 is fixedly connected with the outer ring of the bearing, and the type of the bearing can be selected according to actual use; the U-shaped plate 15 penetrates through the screen plate 8 and is in sliding connection with the screen plate, the bottom of the U-shaped plate 15 is fixedly connected with the bottom of the box body 1, and four conveying pipes 20 fixedly connected with the box body 1 penetrate through the bottom of the box body 1, wherein the number of the conveying pipes 20 is not limited to four; check valves 24 are installed on the four conveying pipes 20, injection heads 25 are installed at the bottoms of the four conveying pipes 20, and soil water potential sensors 26 are installed on the four injection heads 25.

Adjustable equivalent drip irrigation mechanisms are arranged between the four delivery pipes 20 and the screen plate 8, each equivalent drip irrigation mechanism comprises a piston cylinder 17 fixed at the bottom of the box body 1, a piston 19 is connected in the piston cylinder 17 in a sliding manner, the bottom of the screen plate 8 is fixedly connected with an electric push rod 18, the output end of the electric push rod 18 is fixedly connected with the upper end of the piston 19, a short pipe 22 is fixedly connected to the side wall of the piston cylinder 17 in a penetrating manner, and an electromagnetic one-way valve 23 is arranged on the short pipe 22; wherein, check valve 24 is a water outlet check valve, and when the piston cylinder 17 contains water and fertilizer, check valve 24 will not be opened, and when piston 19 moves downwards to increase the pressure in piston cylinder 17, check valve 24 will be opened.

Wherein, the lower extreme of one side of box 1 runs through and installs outlet pipe 12, installs manual valve 13 on the outlet pipe 12, conveniently discharges the water in the box 1.

The upper end of the box body 1 is provided with a control system 11, the control system 11 is electrically connected with the electric push rod 18, the soil water potential sensor 26 and the electromagnet 28, and one side of the box body 1 is provided with a control panel 7 electrically connected with the control system 11.

When the device is used, a worker can add liquid manure into the box body 1 through the feed pipe 6 and then start the servo motor 2;

the servo motor 2 works to drive the rotating rod 3 and the cross rod 9 to rotate, so that the two rectangular frame stirring plates 10 rotate, the rectangular frame stirring plates 10 rotate to stir liquid manure, the liquid manure can be mixed, the lantern ring 21 can slide up and down on the guide rod 35, the inclined plate 5 rotates under the driving of the rectangular frame stirring plates 10, and the inclined plate 5 can move up and down under the impact of liquid, so that the liquid manure can be more effectively mixed, and the liquid manure is more fully mixed;

when the soil water potential sensor 26 detects the change of 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, the electromagnetic one-way valve 23 is opened, when the screen plate 8 moves upwards, the electric push rod 18 and the piston 19 are driven to move upwards, so that liquid manure in the box body 1 can be sucked into the piston cylinder 17 through the short pipe 22, the soil water potential sensor 26 controls the electric push rod 18 to work according to the water potential change of soil, if the soil water potential is low, the electric push rod 18 drives the piston 19 to move upwards to increase the amount of the water and fertilizer in the piston cylinder 17, and conversely, the piston 19 moves downwards, the amount of the water and fertilizer in the piston cylinder 17 is reduced, therefore, the amount of the water and fertilizer in the piston cylinder 17 can be accurately controlled, the accuracy is high, the water and fertilizer are saved, and after the electric push rod 18 moves, the electric push rod 18 and the electromagnetic one-way valve 23 are closed;

meanwhile, the control system 11 controls the electromagnet 28 to work, the electromagnet 28 is powered off, under the action of the spring 29, the magnetic block 30 and the clamping block 31 can move, when the clamping block 31 rotating along with the rotating rod 3 is opposite to the clamping groove 32, the clamping block 31 can be clamped into the clamping groove 32 under the action of the spring 29, so that the rotating rod 3 can be connected with the screw 16 and drive the screw 16 to rotate, the screw 16 can rotate to realize the upward movement of the threaded cylinder 14 and the screen plate 8, further, the plurality of electric push rods 18 and the pistons 19 can be realized, the pistons 19 can move upwards to generate negative pressure in the piston cylinder 17, water and fertilizer in the box body 1 can be conveyed into the piston cylinder 17 through the short pipe 22, then the control system 11 controls the servo motor 2 to rotate reversely, the screen plate 8 and the pistons 19 can move downwards, so that the water and fertilizer in the piston cylinder 17 can be extruded into the conveying pipe 20 and is in soil through the injection head 25, the drip irrigation of the corn is realized;

after the drip irrigation is finished, the control system 11 controls the electromagnet 28 to work, so that the magnetic block 30 is attracted to the electromagnet 28, and the clamping block 31 is separated from the clamping groove 32.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.