A water-fertilizer-air mixing mechanism and an irrigation and fertilization device for farmland

Abstract

The present invention provides a water-fertilizer-gas mixing mechanism and an irrigation and fertilization device for farmland, belonging to the technical field of agricultural fertilization devices. The water-fertilizer-gas mixing mechanism includes a filtering water supply component, a connecting pipeline component, and an irrigation component connected in sequence. The inlet and outlet ends of the mixing pipe fitting are connected to the main water pipe. The water-fertilizer mixing component and the gas adding component are installed in the mixing connection pipe. The water-fertilizer mixing component and the gas adding component are driven by the same gas source. The switching of the gas source between the material suction connecting pipe and the pushing connecting pipe can drive the top piston to move in the injection cylinder, forming the work of extracting the fertilizer stock solution in the fertilizer barrel and releasing it into the inner cavity of the mixing tank. By using the arranged and separated distribution pipes, the mixing of the fertilizer stock solution and the water source can be efficiently achieved. After the gas source enters the inner cavity of the pneumatic cavity, it can drive the rotation of the inner injection gas impeller by the pneumatic blade and the funnel cylinder, and can also enter the inner cavity of the inner injection gas impeller through the inner hole of the funnel cylinder, and be released into the water source in the gas adding cavity through the injection gas micropores.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural fertilization devices, and particularly relates to a water-fertilizer-gas mixing mechanism and an irrigation and fertilization device for farmland. Background Art

[0002] The integrated water-fertilizer-gas technology combines irrigation, fertilization, and gas injection. It precisely blends liquid fertilizers, injects oxygen-containing gas, and then mixes it with irrigation water and transports it to the crop growth area through a controllable pipeline system. The above process ensures that the soil always maintains an appropriate moisture content and looseness. At the same time, according to the unique fertilizer requirements, soil environment, and nutrient content of different crops, as well as the growth cycle of the crops, the system can provide nutrients regularly and quantitatively to meet the needs of different growth stages of the crops.

[0003] In the existing water-fertilizer-gas mixing device, the Venturi injector is used as the main gas injection equipment, and the gas is inhaled by controlling the pressure difference between the inlet and outlet of the injector. There are problems such as relatively large bubble sizes and low gas injection efficiency. Fertilization is carried out by a proportional fertilization pump, and the fertilizer needs to be first dissolved in water and then enter the field through the pipe network. In addition, during the operation process, there are phenomena such as unstable pressure difference leading to unstable air intake and uneven water-fertilizer mixing. The proportional fertilization pump also requires manual preparation of the water-fertilizer mixture, which has the disadvantage of low automation. Summary of the Invention

[0004] One of the purposes of the present invention is to provide a water-fertilizer-gas mixing mechanism. By connecting the same gas source to the water-fertilizer mixing component and the gas injection component, it can not only efficiently and evenly release the fertilizer stock solution into the water source in the mixing tank, but also inject oxygen-containing gas into the gas injection cavity through the double cavity formed by the gas injection cavity and the pneumatic cavity, in cooperation with the unique structure composed of the funnel cylinder and the pneumatic blades.

[0005] The purpose of the present invention is achieved by such a technical solution. A water-fertilizer-gas mixing mechanism includes a mixing pipe fitting, a water-fertilizer mixing component, and a gas injection component. The mixing pipe fitting includes a mixing connection pipe and a proportional mixing pump. The water-fertilizer mixing component includes a mixing tank, a feeding cylinder, a two-way connection seat, a bottom pushing cylinder, a distribution pipe, and a fertilizer barrel. The gas injection component includes a gas injection cavity, an internal gas injection impeller, a funnel cylinder, pneumatic blades, and a pneumatic cavity;

[0006] Both ends of the mixing connecting pipe are connected to the main water supply pipeline. The proportional mixing pump is connected and installed in the mixing connecting pipe. The water and fertilizer mixing assembly is arranged on one side of the proportional mixing pump. The suction pipe of the proportional mixing pump extends into the inner cavity of the mixing tank. The feeding cylinder and the bottom pushing cylinder are fixedly connected up and down through a bidirectional connecting seat. The feeding cylinder is located in the middle of the inner cavity of the mixing tank, and the bottom pushing cylinder is located outside the inner cavity of the mixing tank. A sliding column is slidably connected to the middle of the main body of the bidirectional connecting seat. A top piston is fixed to the top end of the sliding column, and a bottom piston is fixed to the bottom end. The top piston is slidably connected in the inner cavity of the feeding cylinder, and the bottom piston is slidably connected in the inner cavity of the bottom pushing cylinder. A pushing connecting air pipe and a material suction connecting air pipe are connected to the side wall of the bottom pushing cylinder. The distribution pipes are arranged and connected to the side wall of the feeding cylinder, and only allow liquid to flow from the feeding cylinder to the distribution pipes. The fertilizer bucket is located above the mixing tank and is connected to the top inlet of the feeding cylinder, and only allows liquid to flow from the fertilizer bucket to the feeding cylinder. The bottom wall of the distribution pipe is horizontally arranged with discharge holes;

[0007] The air adding cavity is connected in the mixing connecting pipe, and the air adding cavity is located on the water outlet side of the proportional mixing pump. The inner air injection impeller is rotatably connected in the inner cavity of the air adding cavity. The pneumatic cavity is connected to the air adding cavity in an isolated manner. The funnel cylinder is located in the inner cavity of the pneumatic cavity and is fixedly connected to the inner air injection impeller. Air injection micropores are provided in each group of fan blades of the inner air injection impeller. The pneumatic blades are arranged in a circumferential array and fixed on the top surface of the funnel cylinder. The inner hole of the funnel cylinder is connected to the inner cavity of the inner air injection impeller. A liftable air volume regulating block is installed in the inner cavity of the pneumatic cavity.

[0008] The use process of the technical solution of the present invention is as follows:

[0009] The external air source can supply air to the air adding assembly and the water and fertilizer mixing assembly separately, and the inner cavity of the mixing tank can automatically add a fixed amount of water source;

[0010] The inner cavity of the fertilizer bucket can be filled with the fertilizer stock solution. When the top piston is at the initial upper limit position and the fixed amount of water source for mixing is added to the mixing tank, start the external air source to be connected to the material suction connecting air pipe alone, which can drive the bottom piston to move downward in the inner cavity of the bottom pushing cylinder, so that the top piston moves downward in the inner cavity of the feeding cylinder, and the fertilizer stock solution in the inner cavity of the fertilizer bucket can be extracted;

[0011] After the inner cavity of the feeding cylinder is filled with the fertilizer stock solution, cut off the connection between the external air source and the material suction connecting air pipe, and start the external air source to be connected to the pushing connecting air pipe, which can push the bottom piston upward, so that the top piston moves upward, and can push the fertilizer stock solution in the feeding cylinder to flow to the distribution pipes and be uniformly injected into the fixed amount of water source in the mixing tank through each discharge hole. After the water source and the fertilizer stock solution in the mixing tank are mixed, it is automatically formulated into a water-fertilizer mixture;

[0012] Subsequently, the mixing connection pipe is connected to the main water supply pipeline, and the external air source is connected to the inner cavity of the pneumatic chamber. The gas entering the inner cavity of the pneumatic chamber can push the pneumatic blades, driving the rotation of the funnel cylinder and the inner gas injection impeller located in the inner cavity of the gas addition chamber. At the same time, the external air source enters the inner cavity of the inner gas injection impeller from the inner hole of the funnel cylinder and can enter the inner cavity of the gas addition chamber through each group of gas injection micropores, completing the gas addition operation to the water source in the gas addition chamber;

[0013] At the same time, the water source passing through the mixing connection pipe drives the proportional mixing pump. The pressure of the water source itself drives the proportional mixing pump to extract the prepared water-fertilizer mixture in the mixing tank at a certain ratio, completing the mixing of water-fertilizer-air.

[0014] Furthermore, the mixing pipe fitting further includes a dissolved oxygen monitor. A mixing inlet valve and a mixing outlet valve are respectively installed at the water inlet and outlet ends of both ends of the mixing connection pipe. The dissolved oxygen monitor is installed in the mixing connection pipe and is located between the gas addition chamber and the mixing outlet valve. A check valve is also installed in the mixing connection pipe, and the check valve is located between the mixing inlet valve and the proportional mixing pump. The gas addition assembly is installed between the check valve and the proportional mixing pump.

[0015] Furthermore, the water-fertilizer mixing assembly further includes a tank cover. A push valve is installed in the push air connection pipe, and a suction valve is installed in the suction material air connection pipe. A one-way valve is connected between each component feeding pipe and the injection cylinder, and the inner cavity of the injection cylinder flows unidirectionally into the component feeding pipe. The bottom wall of the component feeding pipe is transversely arranged with discharge holes. The tank cover is connected to the top end of the mixing tank, and the fertilizer bucket is installed on the top end of the tank cover. A bottom fixing seat is fixed in the middle of the bottom end of the mixing tank, and the outer bottom end of the injection cylinder is fixedly connected to the bottom fixing seat. The middle of the main body of the double-way connection seat is fixed with an inner sliding seat, and the sliding column is slidably connected to the inner sliding seat.

[0016] Furthermore, the water-fertilizer mixing assembly further includes a suction material connection pipe, a suction material one-way valve, a feeding pipe, a feeding metering valve, a water adding metering valve, and a water adding valve. The suction material connection pipe is fixedly connected to the top end of the injection cylinder. The middle of the main body of the tank cover is installed and fixed with a top fixing seat, and the suction material connection pipe is fixedly connected to the top fixing seat. The suction material one-way valve is installed in the suction material connection pipe. The middle of the bottom end outlet of the fertilizer bucket is connected with a fertilizer valve. One end of the feeding pipe is connected to the fertilizer valve, and the other end is connected to the suction material connection pipe. The feeding metering valve is installed in the fertilizer bucket. A water adding pipe is connected to the upper end of the side wall of the injection cylinder, and the water adding metering valve and the water adding valve are both installed in the water adding pipe.

[0017] Further, the gas adding component further includes a cavity cover, a pneumatic cavity cover, a blowing inclined pipe and an adjusting sliding seat. The cavity cover is connected to the top end of the gas adding cavity. An inner impeller base is fixed to the bottom end of the inner cavity of the gas adding cavity. An inner impeller top seat is fixedly installed in the main body of the cavity cover. The bottom end of the rotating shaft of the inner gas injection impeller is rotatably connected to the inner impeller base, and the top end of the rotating shaft of the inner gas injection impeller is rotatably connected to the inner impeller top seat. Injection micropores are provided in each group of fan blades of the inner gas injection impeller. The pneumatic cavity is fixedly connected to the top end of the cavity cover. The pneumatic cavity cover is connected to the top end of the pneumatic cavity. The blowing inclined pipe is obliquely fixedly connected in the main body of the pneumatic cavity cover and communicates with the inner cavity of the pneumatic cavity. A blowing valve is installed in the main pipeline of the blowing inclined pipe. A built-in check valve is installed in the inner hole at the top end of the rotating shaft of the inner gas injection impeller. A bottom clamping seat is fixed to one side of the bottom end of the inner cavity of the gas adding cavity, and a top clamping seat is fixed to one side of the bottom surface of the cavity cover. A bubble equalizing net is clamped between the bottom clamping seat and the top clamping seat. An electric cylinder seat is fixed to the outer top surface of the pneumatic cavity cover. An electric cylinder is fixedly installed on the inner bottom surface of the electric cylinder seat. An adjusting sliding seat is fixedly installed in the middle of the main body of the pneumatic cavity cover. The telescopic rod of the electric cylinder slides into the inner cavity of the pneumatic cavity from the adjusting sliding seat and is fixedly connected to the top end of the gas volume adjusting block.

[0018] Further, it further includes an air pump and a main control box. The air outlet ends of the air pump are separately connected to the pushing connecting pipe, the material suction connecting pipe and the blowing inclined pipe. The main control box is connected to each electric control component.

[0019] Another object of the present invention is to provide an irrigation and fertilization device for farmland, including a water, fertilizer and gas mixing mechanism, and further including a filtered water supply component, a connecting pipeline component and an irrigation component. The filtered water supply component includes a water source and a water pump. The water pump is connected to the water outlet end of the water source. The water outlet end of the water pump is connected to a sand and gravel filter. The water outlet end of the sand and gravel filter is connected to a water outlet valve. The connecting pipeline component includes a main water pipe, an original pressure gauge, a water passing valve and a differential pressure gauge. The main water pipe is connected to the water outlet end of the water outlet valve. The original pressure gauge, the water passing valve and the differential pressure gauge are installed in the main water pipe in sequence according to the water flow direction. The inlet and outlet ends of the mixing connecting pipe are both connected to the main water pipe. A disc filter is also installed in the water outlet pipeline of the main water pipe. The irrigation component includes a connecting branch pipe, an irrigation valve, a flow meter and a sampling module. The connecting branch pipe is connected to the water outlet end of the main water pipe. The irrigation valve and the flow meter are both installed in the connecting branch pipe. Irrigation branch pipes are connected in the connecting branch pipe according to the crop planting row spacing. Drip irrigation tapes are connected in the irrigation branch pipes according to the crop planting plant spacing. The sampling module is buried near the crops in the farmland and can monitor the soil environment during the growth process of the crops.

[0020] By adopting the above technical solutions, the present invention can achieve the following beneficial effects:

[0021] (1) The present invention not only installs a proportional mixing pump in the main pipe of the mixing connecting pipe, which can bring the water-fertilizer mixed liquid in the water-fertilizer mixing component into the water source flowing in the mixing connecting pipe in a certain proportion, and irrigate the farmland with the water source, but also sets the water-fertilizer mixing component to automatically add water and automatically add fertilizer stock solution, which solves the current problem of manually preparing the water-fertilizer mixed liquid and improves the degree of automation;

[0022] (2) The present invention uses an inner slide seat to connect the injection cylinder and the bottom push cylinder to form a double-chamber structure, and a top piston and a bottom piston are respectively connected to the two ends of the slide column, so that when the external air source pushes the bottom piston in the inner cavity of the bottom push cylinder to move up and down, the top piston in the inner cavity of the injection cylinder can be safely and reliably formed to pump and push, so that the fertilizer stock solution in the fertilizer barrel can be automatically added to the water source in the inner cavity of the mixing tank by the external air source, and the fertilizer stock solution can be efficiently and evenly mixed with the water source in the mixing tank by using the evenly distributed distribution pipes outside the injection cylinder. Compared with the method of adding the water source and the fertilizer stock solution into the inner cavity of the mixing tank and then directly stirring and mixing, it has the advantage of more uniform and faster mixing;

[0023] (3) After the air source is introduced into the inner cavity of the pneumatic cavity, the air source can not only enter the inner cavity of the inner gas injection impeller from the inner hole of the funnel cylinder, and be directly injected into the water source in the inner cavity of the gas injection cavity from each group of evenly distributed gas injection micropores, but also the air source can push the pneumatic blades to drive the funnel cylinder and the inner gas injection impeller to rotate. With the rotation state formed by the inner gas injection impeller in the water source in the inner cavity of the gas injection cavity and the gas ejected from each group of gas injection micropores, a water-gas mixture can be efficiently formed, so that a certain oxygen content is formed in the water source; and a gas volume regulating block that can be raised and lowered is installed in the inner cavity of the pneumatic cavity. The outer surface of the gas volume regulating block matches the inner hole surface of the funnel cylinder. Through the lifting and lowering action of the gas volume regulating block, a gap of different specifications and sizes can be formed between the outer surface of the gas volume regulating block and the inner hole of the funnel cylinder, so that the air intake of the funnel cylinder can be adjusted independently when the rotation speed of the pneumatic blades and the funnel cylinder remains unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a schematic diagram of the system of the present invention;

[0026] Figure 2 This is a connection diagram of the filtering and water supply assembly of the present invention;

[0027] Figure 3 Schematic connection diagram of the connection pipeline assembly of the present invention;

[0028] Figure 4 Schematic connection diagram of the irrigation assembly of the present invention;

[0029] Figure 5 Schematic connection diagram of the mixing pipe fitting of the present invention;

[0030] Figure 6 Schematic structural diagram of the water and fertilizer mixing assembly of the present invention;

[0031] Figure 7 Schematic structural diagram of the injection barrel part of the present invention;

[0032] Figure 8 Schematic structural diagram of the fertilizer barrel part of the present invention;

[0033] Figure 9 Schematic structural diagram of the material distribution pipe part of the present invention;

[0034] Figure 10 Schematic structural diagram of the gas adding assembly of the present invention;

[0035] Figure 11 Explosion structural diagram of the bubble homogenizing net part of the present invention;

[0036] Figure 12 Schematic structural diagram of the funnel cylinder part of the present invention;

[0037] Figure 13 Schematic structural diagram of the gas volume regulating block part of the present invention.

[0038] Reference numerals:

[0039] 1. Filtered water supply assembly; 101. Water source; 102. Water pump; 103. Sand and gravel filter; 104. Outlet valve;

[0040] 2. Connection pipeline assembly; 201. Main water pipe; 202. Original pressure gauge; 203. Water passing valve; 204. Differential pressure gauge; 205. Disc filter;

[0041] 3. Irrigation assembly; 301. Connecting branch pipe; 302. Irrigation valve; 303. Flowmeter; 304. Irrigation branch pipe; 305. Drip irrigation tape; 306. Sampling module;

[0042] 4. Mixing pipe fitting; 401. Mixing connection pipe; 402. Mixing inlet valve; 403. Mixing outlet valve; 404. Check valve; 405. Dissolved oxygen monitor; 406. Proportion mixing pump;

[0043] 5. Water and fertilizer mixing component; 501. Mixing tank; 502. Support feet; 503. Feeding cylinder; 504. Bidirectional connection seat; 505. Bottom pushing cylinder; 506. Pushing air connection pipe; 507. Suction material air connection pipe; 508. Pushing valve; 509. Suction material valve; 510. Distributing pipe; 511. Check valve; 512. Tank cover; 513. Fertilizer barrel; 514. Bottom fixing seat; 515. Inner sliding seat; 516. Slide column; 517. Bottom piston; 518. Top piston; 519. Suction material connecting pipe; 520. Top fixing seat; 521. Suction material check valve; 522. Fertilizer valve; 523. Feeding pipe; 524. Feeding metering valve; 525. Water adding pipe; 526. Water adding metering valve; 527. Water adding valve; 528. Discharge hole;

[0044] 6. Gas adding component; 601. Gas adding chamber; 602. Chamber cover; 603. Inner impeller base; 604. Inner impeller top seat; 605. Inner gas injection impeller; 606. Gas injection micropores; 607. Funnel cylinder; 608. Pneumatic blade; 609. Pneumatic chamber; 610. Pneumatic chamber cover; 611. Blowing inclined pipe; 612. Blowing valve; 613. Built-in check valve; 614. Bubble forming net; 615. Bottom clamping seat; 616. Top clamping seat; 617. Adjusting sliding seat; 618. Electric cylinder seat; 619. Electric cylinder; 620. Gas volume adjusting block;

[0045] 7. Air pump; 8. Main control box. Detailed implementation manners

[0046] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0048] As Figures 1 - 13As shown in the figure, a water, fertilizer and gas mixing mechanism and an irrigation and fertilization device for farmland. The water pump 102 in the filtered water supply component 1 is connected to the water outlet end of the water source 101. The water outlet end of the water pump 102 is connected to a sand filter 103, and the water outlet end of the sand filter 103 is connected to a water outlet valve 104. The water pump 102 can provide power for the irrigation water source, and the sand filter 103 is used to initially filter the water source;

[0049] And when the water outlet valve 104 is closed, the sand filter 103 can be cleaned and drained;

[0050] The main water pipe 201 in the connecting pipeline component 2 is connected to the water outlet end of the water outlet valve 104. The original pressure gauge 202, the water passing valve 203 and the differential pressure gauge 204 are installed in the main water pipe 201 in sequence according to the water flow direction;

[0051] And the water passing valve 203 is located between the inlet and outlet ends of the mixing connecting pipe 401 and the main water pipe 201. When the mixing inlet valve 402 and the mixing outlet valve 403 are closed, the water passing valve 203 can be opened for separate irrigation operation;

[0052] The original pressure gauge 202 is located at the front end where the inlet end of the mixing connecting pipe 401 is connected to the main water pipe 201, and the differential pressure gauge 204 is located at the rear end where the outlet end of the mixing connecting pipe 401 is connected to the main water pipe 201. After injecting gas into the water source in the mixing connecting pipe 401 by the gas adding component 6, the differential pressure formed between the original pressure gauge 202 and the differential pressure gauge 204 can be used to visually display the gas injection volume, and cooperate with the dissolved oxygen monitor 405 to form the oxygen content detection of the water source in the mixing connecting pipe 401 after gas injection, jointly forming the automatic control of the gas volume injected into the water source in the mixing connecting pipe 401 by the gas adding component 6;

[0053] A disc filter 205 is also installed in the outlet pipeline of the main water pipe 201, aiming to further intercept the particulate matter in the water source and prevent the particulate matter from blocking the irrigation device at the rear end;

[0054] The connecting branch pipe 301 in the irrigation component 3 is connected to the water outlet end of the main water pipe 201. The irrigation valve 302 and the flow meter 303 are both installed in the connecting branch pipe 301;

[0055] Similarly, when the irrigation valve 302 is closed, the disc filter 205 can be flushed and drained;

[0056] The flow meter 303 is used to monitor and control the flow rate of the irrigation water to ensure that the farmland receives a reasonable amount of irrigation water;

[0057] The irrigation branch pipes 304 are connected in the connecting branch pipe 301 according to the crop planting row spacing, and the drip irrigation tapes 305 are connected in the irrigation branch pipes 304 according to the crop planting plant spacing;

[0058] The sampling module 306 is buried near the crops in the farmland, and can monitor the soil environment during the growth of the crops, including but not limited to the monitoring of temperature and humidity, nutrient components, pH value, etc., and form an automatic control for the irrigation of the crops;

[0059] Both the inlet and outlet ends of the mixing connection pipe 401 in the mixing pipe fitting 4 are connected to the main water pipe 201. The proportional mixing pump 406 is connected and installed in the mixing connection pipe 401. The water and fertilizer mixing assembly 5 is arranged on one side of the proportional mixing pump 406. Both the water and fertilizer mixing assembly 5 and the gas adding assembly 6 are connected to the same gas source. The suction pipe of the proportional mixing pump 406 extends into the inner cavity of the mixing tank 501. The injection cylinder 503 and the bottom push cylinder 505 are fixedly connected up and down through the two-way connection seat 504. And the injection cylinder 503 is located in the middle of the cavity of the mixing tank 501, and the bottom push cylinder 505 is located outside the cavity of the mixing tank 501. A sliding column 516 is slidably connected to the middle of the main body of the two-way connection seat 504. The top end of the sliding column 516 is fixed with a top piston 518, and the bottom end is fixed with a bottom piston 517. The top piston 518 is slidably connected in the inner cavity of the injection cylinder 503, and the bottom piston 517 is slidably connected in the inner cavity of the bottom push cylinder 505. The side wall of the bottom push cylinder 505 is connected with a push air connecting pipe 506 and a suction material air connecting pipe 507, and the inner cavity of the bottom push cylinder 505 can be supplied with air separately. The distribution pipes 510 are arranged and connected to the side wall of the injection cylinder 503, and only allow the liquid to flow from the injection cylinder 503 to the distribution pipes 510. The fertilizer bucket 513 is located above the mixing tank 501 and is connected to the top inlet of the injection cylinder 503, and only allows the liquid to flow from the fertilizer bucket 513 to the injection cylinder 503. The bottom wall of the distribution pipe 510 is transversely arranged with discharge holes 528;

[0060] The gas adding cavity 601 is connected in the mixing connection pipe 401, and the gas adding cavity 601 is located on the water outlet side of the proportional mixing pump 406. The inner gas injection impeller 605 is rotatably connected in the inner cavity of the gas adding cavity 601. The pneumatic cavity 609 is isolated and connected to the gas adding cavity 601, and the pneumatic cavity 609 is located above the gas adding cavity 601. The funnel cylinder 607 is located in the inner cavity of the pneumatic cavity 609 and is fixedly connected to the inner gas injection impeller 605. Each group of fan blades of the inner gas injection impeller 605 is provided with an air injection micropore 606. The pneumatic blades 608 are arranged in a circumferential array and fixed on the top surface of the funnel cylinder 607. The inner hole of the funnel cylinder 607 is connected to the inner cavity of the inner gas injection impeller 605. The upper part of the cavity of the pneumatic cavity 609 is connected to the gas source formed by the air pump 7. A liftable air volume regulating block 620 is installed in the inner cavity of the pneumatic cavity 609, and the outer surface of the air volume regulating block 620 matches the inner hole surface of the funnel cylinder 607, and the air intake volume of the funnel cylinder 607 can be adjusted separately when the rotational speeds of the pneumatic blades 608 and the funnel cylinder 607 remain unchanged;

[0061] The air outlet ends of the air pump 7 are separately connected to the push air connection pipe 506, the material suction air connection pipe 507, and the blowing inclined pipe 611. The main control box 8 can form automatic control of the water-fertilizer-air mixing and irrigation processes;

[0062] The working principle is as follows:

[0063] The main water pipe 201 connected to the mixing connection pipe 401 is used to provide the irrigation water source. The water-fertilizer mixing component 5 and the air adding component 6 installed in the mixing connection pipe 401 can mix a certain amount of fertilizer and oxygen into the irrigation water source;

[0064] The air pump 7 can separately supply air to the water-fertilizer mixing component 5 and the air adding component 6, and the inner cavity of the mixing tank 501 can automatically add a fixed amount of water source;

[0065] The fertilizer stock solution can be added into the inner cavity of the fertilizer barrel 513. When the top piston 518 is at the initial upper limit position and a fixed amount of water source for mixing is added into the mixing tank 501, the air source formed by starting the air pump 7 is separately connected to the material suction air connection pipe 507, which can drive the bottom piston 517 to move downward in the inner cavity of the bottom push cylinder 505, so that the top piston 518 moves downward in the inner cavity of the injection cylinder 503, and the fertilizer stock solution in the inner cavity of the fertilizer barrel 513 can be extracted;

[0066] Since the distribution pipe 510 is unidirectionally connected to the inner cavity of the injection cylinder 503 and only allows the liquid to flow from the injection cylinder 503 to the distribution pipe 510, the downward movement of the top piston 518 will not extract the water source in the inner cavity of the injection cylinder 503;

[0067] After the inner cavity of the injection cylinder 503 is filled with the fertilizer stock solution, the connection between the air source formed by the air pump 7 and the material suction air connection pipe 507 is cut off, and the air source formed by the air pump 7 is connected to the push air connection pipe 506, which can push the bottom piston 517 to move upward, so that the top piston 518 moves upward, and the fertilizer stock solution in the injection cylinder 503 can be pushed to flow into the distribution pipe 510 and uniformly injected into the fixed amount of water source in the mixing tank 501 through each discharge hole 528. Similarly, since the fertilizer barrel 513 is unidirectionally connected to the injection cylinder 503 and only allows the liquid to flow from the fertilizer barrel 513 to the injection cylinder 503, the pushing action formed by the top piston 518 will not cause the fertilizer stock solution in the injection cylinder 503 to return to the fertilizer barrel 513;

[0068] After the water source and the fertilizer stock solution in the mixing tank 501 are mixed, they are automatically formulated into a water-fertilizer mixture;

[0069] Subsequently, the mixing connection pipe 401 is connected to the main water supply pipeline, and the air source formed by the air pump 7 is connected to the inner cavity of the pneumatic cavity 609. The gas entering the inner cavity of the pneumatic cavity 609 can push the pneumatic blade 608, driving the rotation of the funnel cylinder 607 and the inner gas injection impeller 605 located in the inner cavity of the gas addition cavity 601. At the same time, the air source formed by the air pump 7 enters the inner cavity of the inner gas injection impeller 605 from the inner hole of the funnel cylinder 607 and can enter the inner cavity of the gas addition cavity 601 from each group of gas injection micropores 606, completing the gas addition operation to the water source in the gas addition cavity 601;

[0070] At the same time, the water source passing through the mixing connection pipe 401 drives the proportional mixing pump 406, and the proportional mixing pump 406 extracts the prepared water-fertilizer mixture in the mixing tank 501 at a certain ratio by the pressure of the water source itself, completing the mixing of water-fertilizer-air;

[0071] And when only gas addition is required without fertilization, the proportional mixing pump 406 can be turned off. Only the water source passes through the mixing connection pipe 401 and no fertilizer will be injected. Through the separate connection between the air pump 7 and the pneumatic cavity 609, the operation of gas addition irrigation without fertilization can be realized;

[0072] Specifically, the mixing pipe fitting 4 is as Figure 5 shown. Mixing inlet valves 402 and mixing outlet valves 403 are respectively installed at the water inlet and outlet ends of both ends of the mixing connection pipe 401, which can cut off the water-fertilizer mixing assembly 5, the gas addition assembly 6 and the mixing pipe fitting 4 itself connected to the mixing connection pipe 401, and the conventional irrigation operation can be carried out separately by using the filtered water supply assembly 1, the connecting pipeline assembly 2 and the irrigation assembly 3;

[0073] The dissolved oxygen monitor 405 is installed in the mixing connection pipe 401 and is located between the gas addition cavity 601 and the mixing outlet valve 403. A check valve 404 is also installed in the mixing connection pipe 401, and the check valve 404 is located between the mixing inlet valve 402 and the proportional mixing pump 406. The gas addition assembly 6 is installed between the check valve 404 and the proportional mixing pump 406;

[0074] The dissolved oxygen monitor 405 is used to detect the oxygen content in the water source in the mixing connection pipe 401 after gas injection. The purpose is to adjust the gas volume injected into the water source in the mixing connection pipe 401 by the gas addition assembly 6 in real time according to the detection result of the dissolved oxygen monitor 405;

[0075] The purpose of setting the check valve 404 is to enable the positive pressure gas to be injected into the mixing connection pipe 401 only along the flowing direction of the water source in the mixing connection pipe 401, eliminating the adverse effect of the positive pressure gas on the flowing pressure of the water source in the mixing connection pipe 401.

[0076] The specific structure of the water-fertilizer mixing assembly 5 is as Figure 6 、 Figure 7 、Figure 8 and Figure 9 As shown in Figure 9 , the outer bottom end of the mixing tank 501 is fixedly connected with a support leg 502, the purpose of which is to set up a sufficient distance between the mixing tank 501 and the installation surface to provide space for the bottom push cylinder 505;

[0077] A push valve 508 is installed in the push air connection pipe 506, and a suction valve 509 is installed in the suction material air connection pipe 507, which can independently control the air intake operation of the push air connection pipe 506 and the suction material air connection pipe 507;

[0078] A one-way valve 511 is connected between each component material pipe 510 and the injection cylinder 503, which is used to realize the one-way flow of liquid from the inner cavity of the injection cylinder 503 to the component material pipe 510;

[0079] The tank cover 512 is connected to the top opening of the mixing tank 501, and the fertilizer barrel 513 is installed at the top of the tank cover 512;

[0080] The middle part of the bottom of the mixing tank 501 is fixed with a bottom fixing seat 514, the outer bottom end of the injection cylinder 503 is fixedly connected with the bottom fixing seat 514, the middle part of the main body of the double-way connection seat 504 is fixed with an inner sliding seat 515, and the sliding column 516 is slidably connected with the inner sliding seat 515;

[0081] The suction material connection pipe 519 is fixedly connected to the top of the injection cylinder 503, the middle part of the main body of the tank cover 512 is installed and fixed with a top fixing seat 520, the suction material connection pipe 519 is fixedly connected with the top fixing seat 520, and a suction one-way valve 521 is installed in the suction material connection pipe 519, which is used to realize the one-way flow of liquid from the suction material connection pipe 519 to the inner cavity of the injection cylinder 503;

[0082] A fertilizer valve 522 is connected to the middle outlet at the bottom of the fertilizer barrel 513, one end of the feeding pipe 523 is connected to the fertilizer valve 522, the other end is connected to the suction material connection pipe 519, and a feeding metering valve 524 is installed in the fertilizer barrel 513;

[0083] Sufficient fertilizer stock solution is added into the fertilizer barrel 513. When the top piston 518 is at the initial upper limit position, after the fertilizer valve 522 is opened, the downward movement of the top piston 518 can form a negative pressure in the inner cavity of the injection cylinder 503, so that the fertilizer stock solution in the fertilizer barrel 513 enters the inner cavity of the injection cylinder 503 through the feeding pipe 523 and the suction material connection pipe 519, and during the process of flowing through the feeding metering valve 524, the capacity of the fertilizer stock solution injected into the inner cavity of the injection cylinder 503 can be automatically calculated;

[0084] One side wall upper end of the charging cylinder 503 is connected with a water adding pipe 525. A water adding metering valve 526 and a water adding valve 527 are both installed in the water adding pipe 525. When the inside of the mixing tank 501 is in an empty state, opening the water adding valve 527 can inject water source into the inner cavity of the mixing tank 501. Similarly, through the water adding metering valve 526, the capacity of the water source injected into the inner cavity of the mixing tank 501 can be automatically calculated, so that the water source and the fertilizer stock solution in the mixing tank 501 can be automatically added quantitatively.

[0085] The specific structure of the air adding component 6 is as Figure 10 , Figure 11 , Figure 12 and Figure 13 shown. The cavity cover 602 is covered and connected to the top opening of the air adding cavity 601. The inner impeller base 603 is fixed at the bottom end of the inner cavity of the air adding cavity 601. The inner impeller top seat 604 is fixedly installed in the main body of the cavity cover 602. The bottom end of the rotating shaft of the inner air injection impeller 605 is rotatably connected to the inner impeller base 603, and the top end of the rotating shaft of the inner air injection impeller 605 is hermetically and rotatably connected to the inner impeller top seat 604;

[0086] The pneumatic cavity 609 is fixedly connected to the top of the cavity cover 602. The pneumatic cavity cover 610 is covered and connected to the top opening of the pneumatic cavity 609. The blowing inclined pipe 611 is obliquely and fixedly connected in the main body of the pneumatic cavity cover 610 and communicates with the inner cavity of the pneumatic cavity 609. The purpose of setting the blowing inclined pipe 611 obliquely is that the blowing inclined pipe 611 can form a certain spatial angle with the pneumatic blade 608, which is convenient for the gas blown out from the blowing inclined pipe 611 to better push the pneumatic blade 608;

[0087] A blowing valve 612 is installed in the main pipeline of the blowing inclined pipe 611. The blowing valve 612 is used to control the intake of the inner cavity of the pneumatic cavity 609. A built-in check valve 613 is installed in the inner hole at the top end of the rotating shaft of the inner air injection impeller 605. The built-in check valve 613 can prevent the water source in the inner cavity of the air adding cavity 601 from reversely entering the inner cavity of the pneumatic cavity 609 through the air injection micropores 606 and the inner hole of the funnel cylinder 607;

[0088] One side of the bottom end of the inner cavity of the air adding cavity 601 is fixed with a bottom clamping seat 615. One side of the bottom surface of the cavity cover 602 is fixedly opposed with a top clamping seat 616. A bubble homogenizing net 614 is clamped between the bottom clamping seat 615 and the top clamping seat 616. Micropores are formed in the main body of the bubble homogenizing net 614, which can divide the oxygen-containing bubbles of the water source entering the air adding cavity 601, so that the oxygen-containing bubbles can be better mixed with the water source;

[0089] And as Figure 10 shown, the flow direction of the water source in the mixing connecting pipe 401 and the air adding cavity 601 always follows the direction indicated by the arrow, that is, flowing from the inside of the air adding cavity 601 towards the bubble homogenizing net 614;

[0090] An electric cylinder seat 618 is fixed on the outer top surface of the pneumatic cavity cover 610. An electric cylinder 619 is fixedly installed on the inner bottom surface of the electric cylinder seat 618. An adjusting slide base 617 is fixedly installed in the middle of the main body of the pneumatic cavity cover 610. The telescopic rod of the electric cylinder 619 slides into the inner cavity of the pneumatic cavity 609 from the adjusting slide base 617 and is fixedly connected to the top end of the air volume adjusting block 620, so as to form an automatic lifting and moving action of the air volume adjusting block 620.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water-fertilizer-air mixing mechanism, comprising a mixing pipe fitting, characterized in that: It also includes a water and fertilizer mixing component and an air adding component; The mixing pipe fittings include a mixing connecting pipe and a proportional mixing pump. The water and fertilizer mixing component includes a mixing tank, a feeding cylinder, a two-way connecting seat, a bottom pushing cylinder, a distributing pipe, and a fertilizer bucket. The air adding component includes an air adding cavity, an internal air injection impeller, a funnel cylinder, pneumatic blades, and a pneumatic cavity; Both ends of the mixing connecting pipe are connected to the main water supply pipeline. The proportional mixing pump is connected and installed in the mixing connecting pipe. The water and fertilizer mixing component is arranged on one side of the proportional mixing pump. The suction pipe of the proportional mixing pump extends into the inner cavity of the mixing tank. The feeding cylinder and the bottom pushing cylinder are fixedly connected through the two-way connecting seat. The feeding cylinder is located in the middle of the inner cavity of the mixing tank, and the bottom pushing cylinder is located outside the inner cavity of the mixing tank. A sliding column is slidably connected to the middle of the main body of the two-way connecting seat. A top piston is fixed to the top end of the sliding column, and a bottom piston is fixed to the bottom end. The top piston is slidably connected in the inner cavity of the feeding cylinder, and the bottom piston is slidably connected in the inner cavity of the bottom pushing cylinder. A pushing connecting air pipe and a material suction connecting air pipe are connected to the side wall of the bottom pushing cylinder. The distributing pipe is arranged and connected to the side wall of the feeding cylinder, and only allows liquid to flow from the feeding cylinder to the distributing pipe. The fertilizer bucket is located above the mixing tank and is connected to the top inlet of the feeding cylinder, and only allows liquid to flow from the fertilizer bucket to the feeding cylinder. The air adding cavity is connected in the mixing connecting pipe, and the air adding cavity is located on the water outlet side of the proportional mixing pump. The internal air injection impeller is rotatably connected in the inner cavity of the air adding cavity. The pneumatic cavity is connected to the air adding cavity in a separated manner. The funnel cylinder is located in the inner cavity of the pneumatic cavity and is fixedly connected to the internal air injection impeller. The pneumatic blades are arranged and fixed on the top surface of the funnel cylinder. The inner hole of the funnel cylinder is connected to the inner cavity of the internal air injection impeller. A liftable air volume regulating block is installed in the inner cavity of the pneumatic cavity; and the outer surface of the air volume regulating block matches the inner hole surface of the funnel cylinder, and the air intake volume of the funnel cylinder can be adjusted independently under the condition that the rotational speeds of the pneumatic blades and the funnel cylinder remain unchanged; The air adding component also includes a cavity cover, a pneumatic cavity cover, a blowing inclined pipe, and an adjusting sliding seat. The cavity cover is covered on the top end of the air adding cavity. An internal impeller base is fixed to the bottom end of the inner cavity of the air adding cavity. An internal impeller top seat is fixedly installed in the main body of the cavity cover. The bottom end of the rotating shaft of the internal air injection impeller is rotatably connected to the internal impeller base, and the top end of the rotating shaft of the internal air injection impeller is rotatably connected to the internal impeller top seat. Air injection micro holes are opened in each group of fan blades of the internal air injection impeller. The pneumatic cavity is fixedly connected to the top end of the cavity cover. The pneumatic cavity cover is covered on the top end of the pneumatic cavity. The blowing inclined pipe is obliquely fixedly connected in the main body of the pneumatic cavity cover and is communicated with the inner cavity of the pneumatic cavity. The blowing inclined pipe can form a certain spatial angle with the pneumatic blades. A blowing valve is installed in the main pipeline of the blowing inclined pipe. A built-in check valve is installed in the inner hole at the top end of the rotating shaft of the internal air injection impeller. A bottom clamping seat is fixed to one side of the bottom end of the inner cavity of the air adding cavity, and a top clamping seat is fixed to one side of the bottom surface of the cavity cover. A bubble equalizing net is clamped between the bottom clamping seat and the top clamping seat. An electric cylinder seat is fixed to the outer top surface of the pneumatic cavity cover. An electric cylinder is installed and fixed to the inner bottom surface of the electric cylinder seat. An adjusting sliding seat is installed and fixed in the middle of the main body of the pneumatic cavity cover. The telescopic rod of the electric cylinder slides into the inner cavity of the pneumatic cavity from the adjusting sliding seat and is fixedly connected to the top end of the air volume regulating block.

2. The water-fertilizer-air mixing mechanism according to claim 1, characterized in that: The mixing pipe fitting further includes a dissolved oxygen monitor. A mixing inlet valve and a mixing outlet valve are respectively installed at the water inlet and outlet ends of both ends of the mixing connecting pipe. The dissolved oxygen monitor is installed in the mixing connecting pipe and is located between the air adding cavity and the mixing outlet valve. A check valve is also installed in the mixing connecting pipe, and the check valve 404 is located between the mixing inlet valve and the proportional mixing pump. The air adding assembly is installed between the check valve and the proportional mixing pump.

3. A water, fertilizer and gas mixing mechanism according to claim 1 or 2, characterized in that: The water and fertilizer mixing assembly further includes a tank cover. A push valve is installed in the push air connecting pipe, and a suction valve is installed in the suction material connecting pipe. A one-way valve is connected between each component material pipe and the injection cylinder. The inner cavity of the injection cylinder flows unidirectionally into the component material pipe. The bottom wall of the component material pipe is transversely arranged with discharge holes. The tank cover is connected to the top end of the mixing tank. The fertilizer barrel is installed at the top end of the tank cover. A bottom fixing seat is fixed in the middle of the bottom end of the mixing tank. The outer bottom end of the injection cylinder is fixedly connected to the bottom fixing seat. The main body of the double-direction connecting seat is fixedly provided with an inner sliding seat. The sliding column is slidably connected to the inner sliding seat.

4. The water-fertilizer-air mixing mechanism according to claim 3, characterized in that: The water and fertilizer mixing assembly further includes a suction material connecting pipe, a suction one-way valve, a feeding pipe, a feeding metering valve, a water adding metering valve and a water adding valve. The suction material connecting pipe is fixedly connected to the top end of the injection cylinder. The main body of the tank cover is fixedly provided with a top fixing seat in the middle. The suction material connecting pipe is fixedly connected to the top fixing seat. The suction one-way valve is installed in the suction material connecting pipe. A fertilizer valve is connected to the outlet at the middle of the bottom end of the fertilizer barrel. One end of the feeding pipe is connected to the fertilizer valve, and the other end is connected to the suction material connecting pipe. The feeding metering valve is installed in the fertilizer barrel. A water adding pipe is connected to the upper end of the side wall of the injection cylinder. The water adding metering valve and the water adding valve are both installed in the water adding pipe.

5. A water, fertilizer and gas mixing mechanism according to claim 1, 2 or 4, characterized in that: It further includes an air pump and a main control box. The air outlet end of the air pump is separately connected to the push air connecting pipe, the suction material connecting pipe and the blowing inclined pipe. The main control box 8 is connected to each electric control component.

6. An irrigation and fertilization device for farmland, comprising a water, fertilizer and gas mixing mechanism according to any one of claims 1 to 5, characterized in that: It further includes a filtered water supply assembly. The filtered water supply assembly includes a water source and a water pump. The water pump is connected to the water outlet end of the water source. The water outlet end of the water pump is connected to a sand and gravel filter. The water outlet end of the sand and gravel filter is connected to a water outlet valve.

7. An irrigation and fertilization device for farmland according to claim 6, characterized in that: It further includes a connecting pipeline assembly. The connecting pipeline assembly includes a main water pipe, an original pressure gauge, a water passing valve and a differential pressure gauge. The main water pipe is connected to the water outlet end of the water outlet valve. The original pressure gauge, the water passing valve and the differential pressure gauge are sequentially installed in the main water pipe. The water inlet and outlet ends of the mixing connecting pipe are both connected to the main water pipe. A disc filter is also installed in the water outlet pipeline of the main water pipe.

8. An irrigation and fertilization device for farmland according to claim 7, characterized in that: It further includes an irrigation assembly. The irrigation assembly includes a connecting branch pipe, an irrigation valve, a flowmeter and a sampling module. The connecting branch pipe is connected to the water outlet end of the main water pipe. The irrigation valve and the flowmeter are both installed in the connecting branch pipe. Irrigation branch pipes are arranged and connected in the connecting branch pipe. Drip irrigation tapes are arranged and connected in the irrigation branch pipes. The sampling module is buried in the farmland.

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