Water and fertilizer integrated system and irrigator

Abstract

According to the water and fertilizer integrated system and the irrigator, the solid fertilizer mixing device is arranged, solid fertilizer is directly mixed with water and then prepared into liquid fertilizer to be applied, the purpose of ready-to-use after preparation can be achieved, and the solid fertilizer is easy to store and convenient to use. The defect that when the high-concentration liquid fertilizer is prepared by adopting a method for diluting the high-concentration liquid fertilizer, the high-concentration liquid fertilizer is not easy to store and is easy to cause fertilizer waste can be effectively overcome; the system is easy to arrange, and the controller is adopted for control, so that the system has the advantages of being timely, labor-saving and easy to control. When the irrigation device is used, the irrigation device is inserted into the ground, liquid fertilizer or water is guided to the position near the roots of crops, and the situations of water loss caused by water evaporation and seedling burning caused by high local concentration of the liquid fertilizer due to water evaporation can be effectively reduced; meanwhile, the usage amount of liquid fertilizer and water can be reduced, and the effect of saving resources is achieved.

Description

Technical Field

[0001] The present application relates to agricultural irrigation technology, and in particular to a water-fertilizer integrated system and an irrigator. Background Art

[0002] my country is a large agricultural country, and there are the following problems in agricultural production: First, water resources are scarce and the utilization rate of irrigation water is low. Agricultural water use accounts for 62.5% of the total water use in the country, and the effective utilization coefficient of farmland irrigation water is low, only 0.568, which is far behind the 0.7~0.8 in developed countries. Second, the fertilization method is unreasonable, and the effective utilization rate of chemical fertilizers is low, only 30%. Problems such as air quality degradation, groundwater pollution, and environmental pollution caused by excessive fertilization are becoming increasingly prominent, and reducing the amount of chemical fertilizers and increasing their efficiency has become a key step in the green development of agriculture. Third, agricultural production uses a large amount of land.

[0003] Fully applying the integrated water-fertilizer technology can accelerate the development of water-saving agriculture, effectively save time and improve efficiency, save manpower and material resources, increase production efficiency, improve water and fertilizer utilization, protect the environment, and reduce agricultural planting costs. Therefore, precise and targeted irrigation and fertilization are of great significance for solving the problems caused by flooding and excessive fertilization and promoting agricultural modernization.

[0004] The existing integrated water-fertilizer device prepares solid fertilizer into high-concentration liquid fertilizer, mixes it with water and applies it to crops. However, the prepared liquid fertilizer has poor stability of chemical components in aqueous solution, needs to be prepared and used immediately, is difficult to store for a long time, and easily leads to fertilizer waste. In addition, water or liquid fertilizer is mostly drip-irrigated or sprayed on the ground during irrigation, which easily leads to water evaporation. Water evaporation will make the local concentration of liquid fertilizer too high and cause seedling burn. Summary of the invention

[0005] The present application provides a water-fertilizer integrated system and an irrigator to solve the problems in the above-mentioned background technology.

[0006] The present application provides a water-fertilizer integrated system, including a solid fertilizer mixing device, an irrigation device, and a controller; The solid fertilizer mixing device and the irrigation device are connected to the water pump through the first valve and the second valve respectively, and the water pump is connected to the water source through the filter; The solid fertilizer mixing device is connected to the irrigation device through the fertilizer mixing pump and the check valve in sequence, and the connection between the solid fertilizer mixing device and the irrigation device is located between the second valve and the irrigation device; The irrigation device includes a plurality of parallel irrigation main pipes laid in the field and an irrigator connected to the irrigation main pipes; a regulating valve and a flow meter are respectively provided at the input end of each irrigation main pipe; The first valve, the second valve, the regulating valve, the flow meter, the water pump and the fertilizer mixing pump are all electrically connected to the controller.

[0007] The water-fertilizer integrated system provided by the present application can achieve the purpose of ready-to-use by directly mixing solid fertilizer with water through the provision of a solid fertilizer mixing device. The solid fertilizer is easy to store, and can effectively overcome the disadvantage that when liquid fertilizer is prepared by diluting high-concentration liquid fertilizer, high-concentration liquid fertilizer is difficult to store and easily leads to fertilizer waste. The system of the present application is easy to arrange, and the control by a controller is timely, labor-saving, and easy to operate.

[0008] Optionally, a pH meter and a conductivity meter are further provided between the solid fertilizer mixing device and the fertilizer mixing pump, and both the pH meter and the conductivity meter are electrically connected to the controller; The fertilizer mixing pump is also connected to the solid fertilizer mixing device through a three-way valve.

[0009] Optionally, the system further comprises a soil temperature and humidity sensor and a soil EC meter; A plurality of soil temperature and humidity sensors and a plurality of soil EC meters are respectively provided in the field and are electrically connected to the controller.

[0010] Optionally, the solid fertilizer mixing device includes a fertilizer mixing box; Two opposite sides of the lower part of the fertilizer mixing box are respectively provided with a liquid inlet and a liquid outlet; The side wall of the upper part of the fertilizer mixing box near the liquid inlet is connected to the screw feeder; A material basket is arranged in the fertilizer mixing box, the top of the material basket is fixedly connected to the inner top of the fertilizer mixing box, and a first stirrer is arranged in the material basket; The discharge end of the screw feeder is connected to the basket through a chute.

[0011] Optionally, a plurality of deflection baffles are vertically arranged between the basket and the liquid discharge port.

[0012] Optionally, a second agitator is provided between the baffle plate near the liquid discharge port and the liquid discharge port; The first stirrer and the second stirrer are both screw-propeller stirrers.

[0013] In a second aspect, the present application provides an irrigation device, comprising an inner tube and an outer tube; The outer tube has an open top and a closed bottom, and the inner tube passes through the bottom of the outer tube and extends out, and is slidably connected with the bottom of the outer tube; A sealing plug is arranged inside the outer tube, the sealing plug is slidably connected to the outer tube, and the upper part of the inner tube passes through the sealing plug and is fixedly connected to the sealing plug; A flexible sealing tube is also arranged inside the outer tube, the upper end of the sealing tube is fixedly connected and sealed to the bottom of the sealing plug, the lower end is fixedly connected and sealed to the inner bottom of the outer tube, and the inner tube is wrapped in the sealing tube; A plurality of water distribution holes are arranged in an array from top to bottom along the axial direction on the wall of the inner pipe, and the inner pipe is connected to the irrigation main pipe through a flexible pipe; An adjusting groove is provided on one side wall of the outer tube, the inner tube is fixedly connected with the adjusting structure, the adjusting groove matches the adjusting structure, and the adjusting structure can move along the adjusting groove.

[0014] Optionally, the two sides of the adjustment slot are symmetrically arranged racks; The adjustment structure includes an adjustment handle, and the adjustment handle is fixedly connected to the sealing plug; A mounting box is provided on the lower surface of the adjustment handle, and a locking piece is symmetrically provided in the mounting box, and the locking piece extends out of the mounting box near the adjustment slot and matches with the locking teeth of the adjustment slot; a pair of locking pieces are connected by an elastic structure; A pressing key is arranged on one side of the locking piece close to the installation box, and the pressing key passes through the side of the installation box and extends out.

[0015] Optionally, a soil breaking cone is connected to the lower end of the inner tube.

[0016] Optionally, a filter screen is provided in the water distribution hole.

[0017] The irrigation device provided by the present application has the following beneficial effects: 1) The irrigation device of the present application is inserted into the ground when in use, and guides liquid fertilizer or water to the vicinity of the crop roots, which can effectively reduce water loss caused by evaporation and seedling burning caused by high local concentration of liquid fertilizer due to water evaporation; at the same time, it can also reduce the use of liquid fertilizer and water, and has the effect of saving resources.

[0018] 2) The extension length of the inner tube for guiding water flow in the irrigation device of the present application can be adjusted according to the growth conditions of the crops, and it has the characteristics of wide applicability and easy adjustment. In addition, there are multiple water distribution holes on the inner tube, and the part inserted under the surface can irrigate the crops from top to bottom. This three-dimensional water distribution method has the characteristics of wide water distribution coverage and fast irrigation.

[0019] 3) The irrigation device of the present application has a reasonable structure and is easy to operate and disassemble and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of a water-fertilizer integrated system provided in one embodiment of the present application; Figure 2A schematic diagram of a water-fertilizer integrated system provided in another embodiment of the present application; Figure 3 A schematic diagram of the structure of a solid fertilizer mixing device provided in one embodiment of the present application; Figure 4 A schematic diagram of the structure of an irrigation device provided in one embodiment of the present application; Figure 5 A schematic diagram of a disassembled rear view of an irrigation device provided in an embodiment of the present application; Figure 6 A schematic diagram of a structure of an adjustment structure provided in an embodiment of the present application; Figure 7 A schematic diagram of the internal structure of an adjustment structure provided in one embodiment of the present application.

[0022] Description of reference numerals: 1. Solid fertilizer mixing device; 2. Irrigation device; 3. Controller; 4. Filter; 10. Water pump; 11. Fertilizer mixing box; 12. Screw feeder; 13. Material basket; 14. Baffle plate; 15. Second agitator; 20. Fertilizer mixing pump; 21. Irrigation main pipe; 22. Irrigator; 23. Soil temperature and humidity sensor; 24. Soil EC meter; 30. Flow meter; 40. pH meter; 50. Conductivity meter; 100. First valve; 101. Liquid inlet; 102. Liquid outlet; 1 21. chute; 131. first agitator; 200. second valve; 221. inner tube; 222. outer tube; 223. sealing plug; 224. sealing tube; 225. adjusting groove; 226. adjusting structure; 227. earth-breaking cone; 300. check valve; 400. regulating valve; 500. three-way valve; 600. float valve; 2201. water distribution hole; 2260. elastic structure; 2261. adjusting handle; 2262. installation box; 2263. positioning piece; 2264. pressing key. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0024] like Figure 1 As shown, the present application provides a water-fertilizer integrated system, including a solid fertilizer mixing device 1, an irrigation device 2 and a controller 3; The solid fertilizer mixing device 1 and the irrigation device 2 are connected to the water pump 10 through the first valve 100 and the second valve 200 respectively, and the water pump 10 is connected to the water source through the filter 4; The solid fertilizer mixing device 1 is connected to the irrigation device 2 through the fertilizer mixing pump 20 and the check valve 300 in sequence, and the connection between the solid fertilizer mixing device 1 and the irrigation device 2 is located between the second valve 200 and the irrigation device 2; The irrigation device 2 includes a plurality of parallel irrigation main pipes 21 laid in the field and an irrigator 22 connected to the irrigation main pipes 21; a regulating valve 400 and a flow meter 30 are respectively provided at the input end of each irrigation main pipe 21; The first valve 100 , the second valve 200 , the regulating valve 400 , the flow meter 30 , the water pump 10 and the fertilizer mixing pump 20 are all electrically connected to the controller 3 .

[0025] In the present application, when in use, the corresponding detection devices in the soil respectively monitor the temperature, humidity, salinity and other physical and chemical properties of the soil. When the humidity of the soil is monitored to be lower than the preset low value (or the EC value of the soil is higher than the preset high value), the controller 3 controls the water pump 10 to open, closes the first valve 100 and opens the second valve 200. The water pump 10 draws water from the water source, and the water at the water source passes through the filter 4 (the filter is, for example, a sand filter) to filter and remove solid impurities (such as sand, suspended particles, etc.). At this time, the drawn water will directly enter the irrigation device 2, and be distributed to the irrigation device 22 through multiple irrigation trunks 21, and the crops will be irrigated through the irrigation device 22. At the same time, the flow meter 30 monitors the water flow rate flowing into the irrigation trunk 21 in real time, and feeds back the data to the controller, so that the controller 3 can timely adjust the water flow rate in the irrigation trunk 21 through the regulating valve 400. After the irrigation is completed, the controller 3 controls the above-mentioned opened equipment to close.

[0026] When it is detected that the EC value of the soil is lower than the preset low value, that is, the soluble ion concentration of the soil is lower than the preset low value, the crop is in a state of lack of fertilizer, and the controller 3 controls the second valve 200 to close, and opens the first valve 100 and the water pump 10. At this time, the water drawn by the water pump 10 enters the solid fertilizer mixing device 1 through the first valve 100, and is mixed with the solid fertilizer to form liquid fertilizer of corresponding concentration. Then, the water is pressurized and transported to the irrigation device 2 through the fertilizer mixing pump 20 to irrigate and fertilize the crop.

[0027] The water-fertilizer integrated system provided by the present application, by providing a solid fertilizer mixing device 1, directly mixes solid fertilizer with water to prepare liquid fertilizer for application, which can achieve the purpose of ready-to-use, and the solid fertilizer is easy to store, which can effectively overcome the disadvantage that when liquid fertilizer is prepared by diluting high-concentration liquid fertilizer, high-concentration liquid fertilizer is difficult to store and easily leads to fertilizer waste; and the system of the present application is easy to arrange, and the control by a controller is timely, labor-saving, and easy to operate.

[0028] like Figure 2As shown, optionally, a pH meter 40 and a conductivity meter 50 are further provided between the solid fertilizer mixing device 1 and the fertilizer mixing pump 20, and both the pH meter 40 and the conductivity meter 50 are electrically connected to the controller 3; The fertilizer mixing pump 20 is also connected to the solid fertilizer mixing device 1 through a three-way valve 500 .

[0029] In the present application, during the liquid fertilizer transportation process, the pH meter 40 and the conductivity meter 50 on the pipeline monitor the concentration and pH of the liquid fertilizer in real time, and feed back the measured data to the controller 3. When the detected concentration and pH of the liquid fertilizer are lower than or higher than the preset value, the controller 3 controls the three-way valve 500 to cut the valve to the state of connecting the fertilizer mixing pump 20 and the solid fertilizer mixing device 1, and circulates the output liquid fertilizer to the solid fertilizer mixing device 1 until it is configured into liquid fertilizer with qualified concentration and pH (in this process, for example, if the concentration of the liquid fertilizer is low, the controller 3 can reduce the opening of the first valve 100 or the suction power of the water pump 10, reduce the amount of clean water input to the solid fertilizer mixing device 1, and maintain continuous feeding of the screw feeder 12 until the concentration is qualified; similarly, if the concentration of the liquid fertilizer is high, the controller 3 can increase the opening of the first valve 100 or the suction power of the water pump 10, increase the amount of clean water input to the solid fertilizer mixing device 1, and reduce or stop feeding the screw feeder 12 until the concentration is qualified).

[0030] like Figure 1 As shown, optionally, the system further includes a soil temperature and humidity sensor 23 and a soil EC meter 24; There are multiple soil temperature and humidity sensors 23 and soil EC meters 24 respectively, which are installed in the field and are electrically connected to the controller 3 .

[0031] In the present application, the soil temperature and humidity sensor 23 is used to measure the temperature and humidity of the soil and feed back the monitoring results to the controller 3.

[0032] The soil EC meter 24 is used to measure the concentration of soluble ions in the soil, and to judge whether the crops are lacking in fertilizers, and whether the fertilizer concentration is too high to cause seedling burn.

[0033] like Figure 3 As shown, optionally, the solid fertilizer mixing device 1 includes a fertilizer mixing box 11; The two opposite sides of the lower part of the fertilizer mixing box 11 are respectively provided with a liquid inlet 101 and a liquid outlet 102; The side wall of the upper part of the fertilizer mixing box 11 near the liquid inlet 101 is connected to the screw feeder 12; A material basket 13 is provided in the fertilizer mixing box 11, the top of the material basket 13 is fixedly connected to the inner top of the fertilizer mixing box 11, and a first stirrer 131 is provided in the material basket 13; The discharge end of the screw feeder 12 is connected to the basket 13 through the chute 121 .

[0034] In the present application, when in use, clean water enters the fertilizer mixing box 11 from the bottom to the top from the liquid inlet 101. At the same time, the screw feeder 12 (including a hopper and a screw feeding part connected to the hopper) is turned on (the screw feeder 12 is electrically connected to the controller 3), and the solid fertilizer in the hopper is gradually discharged from the output end. The discharged solid fertilizer enters the basket 13 through the chute 121. At the same time, the first agitator 131 is turned on for stirring. The solution obtained after the solid fertilizer is dissolved is mixed with clean water to finally obtain liquid fertilizer, which is pressurized and transported from the liquid discharge port 102 through the fertilizer mixing pump 20 to the irrigation device 2 for irrigation and fertilization of crops.

[0035] Optionally, a plurality of deflection baffles 14 are vertically arranged between the basket 13 and the liquid discharge port 102 .

[0036] In the present application, a baffle plate 14 is provided to increase the flow path of the liquid, which is beneficial to the mixing of the liquid. In specific use, the baffle plate 14 near the liquid inlet 101 is connected to the mixing box 11 at its lower end and is lower than the lower edge of the chute 121; the baffle plate 14 near the liquid discharge port 102 is connected to the top wall of the mixing box 11 at its upper end, and is close to the bottom of the mixing box 11 at its lower end. In order to prevent the setting of the baffle plate 14 from causing the liquid to be stored in the mixing box 11 and difficult to discharge, a sewage outlet may be opened at the bottom of the area blocked by the baffle plate 14. Alternatively, only two baffle plates 14 may be provided in the mixing box 11, and their arrangement may be as follows: Figure 3 shown.

[0037] like Figure 3 As shown, optionally, a second agitator 15 is provided between the baffle plate 14 near the liquid discharge port 102 and the liquid discharge port 102; The first agitator 131 and the second agitator 15 are both screw-propeller agitators.

[0038] In the present application, the propulsion direction of the first agitator 131 and the second agitator 15 is downward. When the first agitator 131 is pushed downward, since the clean water flows from bottom to top, the propulsion direction of the first agitator 131 is opposite to the water flow direction, which will increase the turbulence of the liquid flow, which is conducive to the mixing of the fertilizer solution and the clean water. In addition, since the first agitator 131 is arranged in the basket 13, the solution formed by the dissolution of the fertilizer entering the basket 13 will also be pushed out of the basket 13 by the driving force of the first agitator 131 when the first agitator 131 rotates, and when the fertilizer in the basket 13 is dissolved and the particle size is smaller than the mesh of the basket 13, the fertilizer particles leaking from the mesh can move downward under the driving action of the first agitator 131, which can extend the travel path of the fertilizer particles in the mixing box 11, which is conducive to the full dissolution of the fertilizer. The second agitator 15 can play the role of stirring and mixing again, so that the output liquid fertilizer concentration is uniform and stable.

[0039] A water-fertilizer integrated system, the working process of which is as follows: When in use, the soil temperature and humidity sensor 23 and the soil EC meter 24 respectively monitor the temperature and humidity of the soil, the soil salinity and other soil physical and chemical properties, and transmit the above data to the controller 3. When the soil humidity is monitored to be lower than the preset low value (or the soil EC value is higher than the preset high value), the controller 3 controls the water pump to open, closes the first valve 100 and opens the second valve 200. The water pump 10 draws water from the water source, and the water at the water source passes through the filter 4 (the filter is, for example, a sand filter) to filter and remove solid impurities (such as sand, suspended particles, etc.). At this time, the drawn water will directly enter the irrigation device 2, and be distributed to the irrigation device 22 through multiple irrigation trunks 21, and the crops will be irrigated through the irrigation device 22. At the same time, the flow meter 30 monitors the water flow rate flowing into the irrigation trunk 21 in real time, and feeds back the data to the controller, so that the controller 3 can timely adjust the water flow rate in the irrigation trunk 21 through the regulating valve 400. After the irrigation is completed, the controller 3 controls the above-mentioned opened equipment to close.

[0040] When it is detected that the EC value of the soil is lower than the preset low value, that is, the soluble ion concentration of the soil is lower than the preset low value, the crop is in a fertilizer deficiency state. The controller 3 controls the second valve 200 to close, opens the first valve 100 and the water pump 10, and the three-way valve 500 is switched to a state of connecting the fertilizer mixing pump 20 and the check valve 300. At this time, the water drawn by the water pump 10 enters the solid fertilizer mixing device 1 through the first valve 100 and is mixed with the solid fertilizer to form liquid fertilizer of corresponding concentration. When mixing and preparing liquid fertilizer in the solid fertilizer mixing device 1, clean water enters the fertilizer mixing box 11 from the bottom to the top from the liquid inlet 101. At the same time, the screw feeder 12 is turned on (the screw feeder 12 is electrically connected to the controller 3), and the solid fertilizer in the hopper is gradually discharged from the output end. The discharged solid fertilizer enters the basket 13 through the chute 121, and the first agitator 131 is turned on for stirring. The solution obtained after the solid fertilizer is dissolved and the clean water pass through a plurality of baffles 14 (in this process, the fertilizer solution and the clean water are mixed), and then the liquid fertilizer finally obtained after stirring by the second agitator 15 is conveyed from the liquid discharge port 102 through the fertilizer mixing pump 20 under pressure to the irrigation device 2 for irrigation and fertilization of crops.

[0041] During the liquid fertilizer transportation process, the pH meter 40 and the conductivity meter 50 on the pipeline monitor the concentration and pH of the liquid fertilizer in real time, and feed back the measured data to the controller 3. When the detected concentration and pH of the liquid fertilizer are lower than or higher than the preset value, the controller 3 controls the three-way valve 500 to cut the valve to the state of connecting the fertilizer mixing pump 20 and the solid fertilizer mixing device 1, and circulates the output liquid fertilizer to the solid fertilizer mixing device 1 until it is configured into liquid fertilizer with qualified concentration and pH (in this process, for example, if the concentration of the liquid fertilizer is low, the controller 3 can reduce the opening of the first valve 100 or the suction power of the water pump 10, reduce the amount of clean water input to the solid fertilizer mixing device 1, and maintain continuous feeding of the screw feeder 12 until the concentration is qualified; similarly, if the concentration of the liquid fertilizer is high, the controller 3 can increase the opening of the first valve 100 or the suction power of the water pump 10, increase the amount of clean water input to the solid fertilizer mixing device 1, and reduce or stop feeding of the screw feeder 12 until the concentration is qualified).

[0042] Second, as Figure 4 and Figure 5 As shown, the present application provides an irrigation device, comprising an inner tube 221 and an outer tube 222; The outer tube 222 is open at the top and closed at the bottom, and the inner tube 221 passes through the bottom of the outer tube 222 and extends out, and is slidably connected to the bottom of the outer tube 222; A sealing plug 223 is provided inside the outer tube 222, and the sealing plug 223 is slidably connected to the outer tube 222, and the upper part of the inner tube 221 passes through the sealing plug 223 and is fixedly connected to the sealing plug 223; A flexible sealing tube 224 is also provided inside the outer tube 222. The upper end of the sealing tube 224 is fixedly connected and sealed to the bottom of the sealing plug 223, and the lower end is fixedly connected and sealed to the inner bottom of the outer tube 222. The inner tube 221 is wrapped inside the sealing tube 224. A plurality of water distribution holes 2201 are arranged in an array from top to bottom along the axial direction on the wall of the inner tube 221, and the inner tube 221 is connected to the irrigation main pipe 21 through a flexible pipe; An adjusting groove 225 is provided on one side wall of the outer tube 222 . The inner tube 221 is fixedly connected to the adjusting structure 226 . The adjusting groove 225 matches the adjusting structure 226 , and the adjusting structure 226 can move along the adjusting groove 225 .

[0043] The water distribution holes 2201 opened on the inner tube 221 of the present application are arranged in a single row. This arrangement can increase the strength of the inner tube 221 and also facilitate the adjustment of the water distribution points.

[0044] In actual use, the contact portion between the inner tube 221 and the bottom of the outer tube 222 can be sealed by corresponding sealing devices such as sealing gaskets, sealing rings, etc. to prevent liquid leakage.

[0045] When the irrigation device of the present application is in use, the inner tube 221 is connected to the irrigation main pipe 21 through a flexible pipe. According to the growth of the crop, the length of the inner tube 221 exposed from the bottom 222 of the outer tube is adjusted by cooperating with the adjustment structure 226 and the adjustment groove 225 (for example, it can be adjusted shorter in the early stage of crop growth, and longer in the middle stage of crop growth when the root system is well developed). After the adjustment is completed, the side with the water distribution hole 2201 is close to the crop, and the inner tube 221 is vertically inserted into the soil near the crop. When water (or liquid fertilizer) is passed through the inner tube 221, the water (or liquid fertilizer) will flow out through the water distribution hole 2201 to irrigate (or fertilize) the crop. As for the inner tube 221 located in the outer tube 222, due to the presence of the flexible sealing tube 224, the liquid retained by the water distribution hole 2201 on the inner tube 221 will be stored in the sealing tube 224 without leakage.

[0046] The irrigation device provided by the present application has the following beneficial effects: 1) The irrigation device of the present application is inserted into the ground when in use, and guides liquid fertilizer or water to the vicinity of the crop roots, which can effectively reduce water loss caused by evaporation and seedling burning caused by high local concentration of liquid fertilizer due to water evaporation; at the same time, it can also reduce the use of liquid fertilizer and water, and has the effect of saving resources.

[0047] 2) The extension length of the inner tube for guiding water flow in the irrigation device of the present application can be adjusted according to the growth conditions of the crops, and it has the characteristics of wide applicability and easy adjustment. In addition, there are multiple water distribution holes on the inner tube, and the part inserted under the surface can irrigate the crops from top to bottom. This three-dimensional water distribution method has the characteristics of wide water distribution coverage and fast irrigation.

[0048] 3) The irrigation device of the present application has a reasonable structure and is easy to operate and disassemble and maintain.

[0049] like Figure 5~Figure 7 As shown, optionally, the two sides of the adjustment slot 225 are symmetrically arranged racks; The adjustment structure 226 includes an adjustment handle 2261, and the adjustment handle 2261 is fixedly connected to the sealing plug 223; The lower surface of the adjustment handle 2261 is provided with an installation box 2262, and the installation box 2262 is symmetrically provided with a locking piece 2263, and the locking piece 2263 extends out of the installation box 2262 near the adjustment slot 225 and matches with the locking teeth of the adjustment slot 225; a pair of the locking pieces 2263 are connected by an elastic structure 2260; A pressing key 2264 is provided on one side of the locking piece 2263 close to the installation box 2262 , and the pressing key 2264 passes through the side of the installation box 2262 and extends out.

[0050] In the present application, the locking piece 2263 is movably connected to the installation box 2262, and the elastic structure 2260 is in an extended state. In this state, the two locking pieces 2263 are far apart, and the locking pieces 2263 can be stuck in the latch teeth to achieve position limiting; when working, external force is applied simultaneously by the pressing keys 2264 on both sides, so that the locking pieces 2263 are close to each other to compress the elastic structure 2260, and the locking pieces 2263 are separated from the latch teeth. At this time, the inner tube 221 can be moved along the latch tooth groove 225. The elastic structure 2260 is, for example, a spring, a rubber block or other elastic device. In the present application, during the adjustment process, the operator can simultaneously pinch the push buttons 2264 on both sides of the locking piece 2263 so that the two locking pieces 2263 are brought together and out of the state of the locking teeth. In this state, the length of the inner tube 221 exposed from the bottom 222 of the outer tube can be adjusted. After the adjustment is completed, the locking piece 2263 is released. The locking piece 2263 will return to the separated state under the action of the elastic force of the elastic structure 2260, and be locked into the nearest tooth mouth to achieve limiting.

[0051] In the embodiment of the present application, when the racks on both sides of the adjustment slot 225 are set, the teeth on each rack can be set to have an upper surface with an inclined surface and a lower surface with a flat surface (such as Figure 5 As shown), this shape facilitates the limiting of the positioning piece 2263.

[0052] like Figure 4 and Figure 5 As shown, optionally, a breaking cone 227 is connected to the lower end of the inner tube 221 .

[0053] In the present application, the ground-breaking cone 227 is a solid structure, made of hard materials such as hard plastic or metal, to improve its strength and facilitate ground-breaking. The ground-breaking cone 227 can be connected to the inner tube 221 in a detachable manner, such as a snap connection, a threaded connection, a plug-in connection, etc., to facilitate maintenance and replacement of the ground-breaking cone 227.

[0054] Optionally, a filter screen is provided in the water distribution hole 2201 .

[0055] In the present application, since the inner tube 221 is to be inserted into the ground for use, solid impurities such as soil may enter the inner tube 221 through the water distribution hole 2201 during the insertion process, causing the inner tube to be blocked. Therefore, a filter net is provided to effectively prevent soil and other solid impurities from entering the large inner tube 221 and causing blockage of the inner tube 221.

[0056] The present application provides an irrigation device, and its use process is as follows: when in use, the inner tube 221 is connected to the irrigation main pipe 21 through a flexible pipe, and the length of the inner tube 221 exposed from the bottom 222 of the outer tube is adjusted according to the growth of the crop (for example, it can be adjusted shorter in the early stage of crop growth, and can be adjusted longer in the middle stage of crop growth when the root system is well developed). During the adjustment process, the operator can simultaneously pinch the pressing keys 2264 on both sides of the locking piece 2263, so that the two locking pieces 2263 are brought together and separated from the state of the locking teeth. In this state, the length of the inner tube 221 exposed from the bottom 222 of the outer tube can be adjusted. After the adjustment is completed, the locking piece 2263 is released, and the locking piece 2263 will restore the separated state under the elastic force of the elastic structure 2260, and be locked into the nearest locking tooth mouth to achieve limiting.

[0057] Then, the side with the water distribution hole 2201 is placed close to the crop, and the inner tube 221 is vertically inserted into the soil near the crop (due to the setting of the soil-breaking cone 227, the insertion of the inner tube 221 can be facilitated). When water (or liquid fertilizer) passes through the inner tube 221, the water (or liquid fertilizer) will flow out through the water distribution hole 2201 to irrigate (or fertilize) the crop. As for the inner tube 221 located in the outer tube 222, due to the presence of the flexible sealing tube 224, the liquid retained by the water distribution hole 2201 on the inner tube 221 will be stored in the sealing tube 224 without leakage.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features therein may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A water-fertilizer integrated system, characterized in that: It comprises a solid fertilizer mixing device (1), an irrigation device (2) and a controller (3); The solid fertilizer mixing device (1) and the irrigation device (2) are connected to a water pump (10) via a first valve (100) and a second valve (200), respectively, and the water pump (10) is connected to a water source via a filter (4); The solid fertilizer mixing device (1) is connected to the irrigation device (2) via a fertilizer mixing pump (20) and a check valve (300) in sequence, and the connection between the solid fertilizer mixing device (1) and the irrigation device (2) is located between the second valve (200) and the irrigation device (2); The irrigation device (2) comprises a plurality of parallel irrigation main pipes (21) laid in a field and an irrigator (22) connected to the irrigation main pipes (21); a regulating valve (400) and a flow meter (30) are respectively provided at the input end of each of the irrigation main pipes (21); The first valve (100), the second valve (200), the regulating valve (400), the flow meter (30), the water pump (10) and the fertilizer mixing pump (20) are all electrically connected to the controller (3).

2. The water-fertilizer integrated system according to claim 1, characterized in that: A pH meter (40) and a conductivity meter (50) are also provided between the solid fertilizer mixing device (1) and the fertilizer mixing pump (20), and the pH meter (40) and the conductivity meter (50) are both electrically connected to the controller (3); The fertilizer mixing pump (20) is also connected to the solid fertilizer mixing device (1) via a three-way valve (500).

3. The water-fertilizer integrated system according to claim 1, characterized in that: The system also includes a soil temperature and humidity sensor (23) and a soil EC meter (24); The soil temperature and humidity sensors (23) and the soil EC meters (24) are respectively provided in plurality and arranged in the field, and are all electrically connected to the controller (3).

4. The water-fertilizer integrated system according to claim 1, characterized in that: The solid fertilizer mixing device (1) comprises a fertilizer mixing box (11); Two opposite side surfaces of the lower part of the fertilizer mixing box (11) are respectively provided with a liquid inlet (101) and a liquid outlet (102); The upper side wall of the fertilizer mixing box (11) close to the liquid inlet (101) is connected to the screw feeder (12); A material basket (13) is arranged in the fertilizer mixing box (11), the top of the material basket (13) is fixedly connected to the inner top of the fertilizer mixing box (11), and a first stirrer (131) is arranged in the material basket (13); The discharge end of the screw feeder (12) is connected to the material basket (13) via a chute (121).

5. The water-fertilizer integrated system according to claim 4, characterized in that: A plurality of deflection baffles (14) are vertically arranged between the material basket (13) and the liquid discharge port (102).

6. The water-fertilizer integrated system according to claim 5, characterized in that: A second agitator (15) is provided between the baffle plate (14) close to the liquid discharge port (102) and the liquid discharge port (102); The first agitator (131) and the second agitator (15) are both screw-propeller agitators.

7. An irrigation device, applied to the water-fertilizer integrated system according to any one of claims 1 to 6, characterized in that: comprising an inner tube (221) and an outer tube (222); The outer tube (222) is open at the top and closed at the bottom, and the inner tube (221) passes through the bottom of the outer tube (222) and extends out, and is slidably connected to the bottom of the outer tube (222); A sealing plug (223) is provided inside the outer tube (222), the sealing plug (223) is slidably connected to the outer tube (222), and the upper portion of the inner tube (221) passes through the sealing plug (223) and is fixedly connected to the sealing plug (223); A flexible sealing tube (224) is also provided inside the outer tube (222); the upper end of the sealing tube (224) is fixedly connected to and sealed at the bottom of the sealing plug (223), and the lower end is fixedly connected to and sealed at the inner bottom of the outer tube (222); the inner tube (221) is wrapped inside the sealing tube (224); A plurality of water distribution holes (2201) are arranged in an array from top to bottom along the axial direction on the wall of the inner tube (221), and the inner tube (221) is connected to the irrigation main pipe (21) via a flexible pipe; An adjustment groove (225) is provided on one side wall of the outer tube (222), the inner tube (221) is fixedly connected to the adjustment structure (226), the adjustment groove (225) matches the adjustment structure (226), and the adjustment structure (226) can move along the adjustment groove (225).

8. The irrigation device according to claim 7, characterized in that: The two sides of the adjustment slot (225) are symmetrically arranged racks; The adjustment structure (226) comprises an adjustment handle (2261), and the adjustment handle is fixedly connected to the sealing plug (223); The lower surface of the adjustment handle (2261) is provided with an installation box (2262), and the installation box (2262) is symmetrically provided with locking pieces (2263), and the locking pieces (2263) extend out of the installation box (2262) at a position close to the adjustment slot (225) and match with the locking teeth of the adjustment slot (225); a pair of the locking pieces (2263) are connected by an elastic structure (2260); A pressing key (2264) is provided on one side of the locking piece (2263) close to the installation box (2262), and the pressing key (2264) passes through the side of the installation box (2262) and protrudes.

9. The irrigation device according to claim 7, characterized in that: The lower end of the inner tube (221) is connected to a soil breaking cone (227).

10. The irrigation device according to claim 7, characterized in that: A filter screen is provided in the water distribution hole (2201).

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