Fertilization device and system based on Venturi pump precision pressure stabilization bypass

Abstract

The present application discloses a fertilization device and system based on a precision pressure-stabilizing bypass of a Venturi pump, and specifically relates to the technical field of agricultural equipment; the precision fertilization device uses a first Venturi pump, a second Venturi pump and the third Venturi pump to mix the mother liquids in a first mother liquid barrel, a second mother liquid barrel and a third mother liquid barrel that need to be mixed; due to the use principle of the Venturi pump, if the concentration of the fertilization liquid needs to be adjusted, it is only necessary to adjust the pressure at both ends of the first Venturi pump and the second Venturi pump; the application principle of the Venturi pump is utilized, that is, the pressure difference between the second end and the third end of the first Venturi pump, the second Venturi pump and the third Venturi pump is changed by the suction force generated by the water pump; the pressure difference between the first end and the third end of the first Venturi pump, the second Venturi pump and the third Venturi pump is changed by the pressure difference maintaining device, thereby completing the adjustment of the fertilizer or pesticide concentration simply and accurately.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural equipment, and in particular to a fertilization device and system based on a precision pressure-stabilizing bypass of a Venturi pump. Background Art

[0002] In the prior art, agricultural irrigation mainly refers to the watering and irrigation of crops such as farmland or gardens in agricultural cultivation areas. The irrigation principle is that the irrigation amount, number of irrigations and time should be determined according to the water demand characteristics of the crops, climate, soil conditions, etc.; and the irrigation amount refers to the amount of water output from the output end of a single irrigation. In actual applications, due to the influence of factors such as climate and water demand characteristics, the irrigation amount will also be different. Therefore, the output water pressure needs to be adjusted each time irrigation is carried out so that the water output from the output end at a single time meets the actual water demand.

[0003] In the prior art, agricultural irrigation is no longer limited to irrigation water, but can also be used to irrigate pesticides and fertilizers. However, in the process of irrigating pesticides and fertilizers, the concentration of waste or pesticides will be controlled. In practical applications, the amount of water required is generally calculated first, and then the amount of corresponding pesticides or fertilizers is calculated. However, this will not only cause uneven stirring and incomplete dissolution of pesticides or fertilizers, which will lead to waste of pesticides or fertilizers, but also make the final output of the pesticide or fertilizer liquid concentration less accurate.

[0004] In order to solve the above problems, the present application proposes a fertilization device and system based on a Venturi pump precision pressure stabilization bypass to solve the above problems. Utility Model Content

[0005] In a first aspect, an embodiment of the present application provides a fertilization device based on a precision pressure-stabilizing bypass of a Venturi pump, the fertilization device comprising: a first mother liquid barrel, a second mother liquid barrel, a third mother liquid barrel, a first Venturi pump, a second Venturi pump, a third Venturi pump, a water pump, a pressure difference maintaining device and a pipeline, one end of the pipeline is set as an input end, and the other end of the pipeline away from the input end is respectively connected to the first ends of the first Venturi pump, the second Venturi pump and the third Venturi pump, the second end of the first Venturi pump is connected to the first mother liquid barrel, the second end of the second Venturi pump is connected to the second mother liquid barrel, the second end of the third Venturi pump is connected to the third mother liquid barrel, the first Venturi pump, the second Venturi pump, and the third Venturi pump are connected. The third end of the venturi pump and the third venturi pump is connected to the water pump through a pipeline, so that the water pump generates suction to change the pressure difference between the second end and the third end of the first venturi pump, the second venturi pump and the third venturi pump, and one end of the water pump away from the first venturi pump, the second venturi pump and the third venturi pump is set as an output end; the first ends of the first venturi pump, the second venturi pump and the third venturi pump are connected to the third ends of the first venturi pump, the second venturi pump and the third venturi pump through a pressure difference maintaining device in sequence, so that the pressure difference between the first end and the third end of the first venturi pump, the second venturi pump and the third venturi pump is changed through the pressure difference maintaining device.

[0006] Optionally, the fertilization device further includes a pressure relief valve, one end of which is connected to the first end of the first venturi pump, the second venturi pump and the first end of the third venturi pump respectively, and the other end of the pressure relief valve is connected to the output end.

[0007] Optionally, the fertilization device further comprises a mixing chamber, and the mixing chamber is arranged between the third ends of the first venturi pump, the second venturi pump and the third venturi pump and the water pump.

[0008] Optionally, the fertilization device further includes a circulation pump, the first end of which is respectively connected to the first end of the first venturi pump, the second venturi pump and the third venturi pump, and the second end of which is respectively connected to the output end of the pipeline.

[0009] Optionally, the structures of the first Venturi pump, the second Venturi pump and the third Venturi pump all include: a contraction section, a mixing section, and a diffusion section, the contraction section is the third end of the first Venturi pump, the second Venturi pump and the third Venturi pump, the diffusion section is the second end of the first Venturi pump, the second Venturi pump and the third Venturi pump, and the mixing section is the first end of the first Venturi pump, the second Venturi pump and the third Venturi pump.

[0010] Optionally, a central angle of a contraction section of the first venturi pump, the second venturi pump and the third venturi pump is not greater than ninety degrees.

[0011] Optionally, a central angle of a diffusion section of the first venturi pump, the second venturi pump and the third venturi pump is not greater than ninety degrees.

[0012] Optionally, a water check valve is provided at the output end.

[0013] In a second aspect, an embodiment of the present application provides a fertilization system based on a Venturi pump precision pressure-stabilizing bypass, the precision fertilization system comprising: a second water pump, a stop valve, a main pipeline, a first valve actuator, a second valve actuator, a third valve actuator and a fertilization device based on a Venturi pump precision pressure-stabilizing bypass as described in any one of the first aspects, the input end and the output end of the fertilization device are respectively connected to the main pipeline, the first valve actuator, the second valve actuator, and the third valve actuator are arranged on the side of the main pipeline close to the input end of the fertilization device, the stop valve is arranged on the input end of the fertilization device, and the second water pump is arranged on the side of the main pipeline close to the output end of the fertilization device, so that the liquid to be fertilized mixed by the fertilization device is transported to the first valve actuator, the second valve actuator, and the third valve actuator respectively through the main pipeline under the action of the second water pump.

[0014] The fertilization device based on the precision pressure-stabilizing bypass of the Venturi pump used in the embodiment of the present application comprises: a first mother liquid barrel, a second mother liquid barrel, a third mother liquid barrel, a first Venturi pump, a second Venturi pump, a third Venturi pump, a water pump, a pressure difference maintaining device and a pipeline, one end of the pipeline is set as an input end, and the other end of the pipeline away from the input end is connected to the first ends of the first Venturi pump, the second Venturi pump and the third Venturi pump respectively, the second end of the first Venturi pump is connected to the first mother liquid barrel, the second end of the second Venturi pump is connected to the second mother liquid barrel, the second end of the third Venturi pump is connected to the third mother liquid barrel, the first Venturi pump, the second Venturi pump and The third end of the third venturi pump is connected to the water pump through a pipeline, so that the water pump generates suction to change the pressure difference between the second end and the third end of the first venturi pump, the second venturi pump and the third venturi pump. One end of the water pump away from the first venturi pump, the second venturi pump and the third venturi pump is set as the output end; the first ends of the first venturi pump, the second venturi pump and the third venturi pump are connected to the third ends of the first venturi pump, the second venturi pump and the third venturi pump through a pressure difference maintaining device in turn, so that the pressure difference between the first end and the third end of the first venturi pump, the second venturi pump and the third venturi pump is changed through the pressure difference maintaining device. The scheme of the present application uses the above structure to mix the mother liquids in the first mother liquid barrel, the second mother liquid barrel and the third mother liquid barrel that need to be mixed. Due to the use principle of the Venturi pump, if the concentration of the fertilizing liquid needs to be adjusted, it is only necessary to adjust the pressure at both ends of the first Venturi pump and the second Venturi pump. The application principle of the Venturi pump is used, that is, the suction force generated by the water pump changes the pressure difference between the second end and the third end of the first Venturi pump, the second Venturi pump and the third Venturi pump, and the pressure difference between the first end and the third end of the first Venturi pump, the second Venturi pump and the third Venturi pump is changed by the pressure difference holding device, so as to simply and accurately complete the adjustment of the fertilizer or pesticide concentration. And the scheme of the present application can work under positive pressure, which has the advantage of convenient water replenishment of the equipment, and the device of the present application can no longer work under negative pressure, thereby ensuring the positive pressure state in the Venturi pump. If the pressure in the equipment is negative pressure, water is replenished through the main pipeline, so that the negative pressure in the equipment is converted into positive pressure.

[0015] Other optional features and technical effects of the embodiments of the present application are partially described below, and partially can be understood by reading this document. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. The elements shown are not limited by the proportions shown in the accompanying drawings. The same or similar reference numerals in the accompanying drawings represent the same or similar elements, wherein:

[0017] Figure 1 A schematic diagram of a fertilization device based on a Venturi pump precision pressure stabilization bypass according to an embodiment of the present application is shown;

[0018] Figure 2 A schematic diagram of adjusting the fertilizer ratio of a fertilizing device based on a Venturi pump precision pressure stabilization bypass according to an embodiment of the present application is shown;

[0019] Figure 3 A schematic structural diagram of a venturi pump of a fertilization device based on a venturi pump precision pressure stabilization bypass according to an embodiment of the present application is shown;

[0020] Figure 4 A cross-sectional view of another venturi pump of a fertilization device based on a venturi pump precision pressure stabilization bypass according to an embodiment of the present application is shown;

[0021] Figure 5 A schematic structural diagram of another venturi pump of a fertilization device based on a venturi pump precision pressure stabilization bypass according to an embodiment of the present application is shown;

[0022] Figure 6 A schematic diagram of another fertilization device based on a Venturi pump precision pressure stabilization bypass according to an embodiment of the present application is shown;

[0023] Figure 7 A schematic diagram of a fertilization system based on a Venturi pump precision pressure stabilization bypass according to an embodiment of the present application is shown.

[0024] Figure markings: 10-first Venturi pump; 11-second Venturi pump; 12-third Venturi pump; 13-input end; 14-output end; 20-first mother liquid barrel; 21-second mother liquid barrel; 22-third mother liquid barrel; 30-pressure difference maintaining device; 50-water pump; 60-mixing chamber; 61-circulation pump; 70-second water pump; 71-stop valve, 72-main pipeline; 73-first valve actuator; 74-second valve actuator; 75-third valve actuator. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with specific implementation methods and drawings. Here, the illustrative implementation methods and descriptions of the present application are used to explain the present application, but are not intended to limit the present application.

[0026] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0027] Figure 1 A schematic diagram of a fertilization device based on a Venturi pump precision pressure stabilization bypass according to an embodiment of the present application is shown; Figure 1 As shown, an embodiment of the present application provides a fertilization device based on a Venturi pump precision pressure-stabilizing bypass, the fertilization device comprising: a first mother liquid barrel 20, a second mother liquid barrel 21, a third mother liquid barrel 22, a first Venturi pump 10, a second Venturi pump 11, a third Venturi pump 12, a water pump 50, a pressure difference maintaining device 30 and a pipeline, one end of the pipeline is set as an input end 13, and the other end of the pipeline away from the input end 13 is connected to the first end of the first Venturi pump 10, the second Venturi pump 11 and the third Venturi pump 12 respectively, the second end of the first Venturi pump 10 is connected to the first mother liquid barrel 20, the second end of the second Venturi pump 11 is connected to the second mother liquid barrel 21, the second end of the third Venturi pump 12 is connected to the third mother liquid barrel 22, the first Venturi pump 10, the second Venturi pump 11 is connected to the second mother liquid barrel 21, the second end of the third Venturi pump 12 is connected to the third mother liquid barrel 22, and the first Venturi pump 10, the second Venturi pump 11 The third end of the third venturi pump 12 is connected to the water pump 50 through a pipeline, so that the water pump 50 generates suction to change the pressure difference between the second end and the third end of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12, and one end of the water pump 50 away from the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 is set as an output end 14; the first ends of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 are connected to the third ends of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 through the pressure difference maintaining device 30 in sequence, so that the pressure difference between the first end and the third end of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 is changed through the pressure difference maintaining device 30.

[0028] For further explanation, the liquid flow path of the fertilizing device is described herein. Specifically, when the fertilizing device needs to be used, the water pump 50 is turned on to apply pressure to the first venturi pump 10, the second venturi pump 11, and the third venturi pump 12 near the water pump 50, so that the first end and the second end of the first venturi pump 10, the second venturi pump 11, and the third venturi pump 12 respectively generate a pressure difference with the third end, so that the first venturi pump 10, the second venturi pump 11, and the third venturi pump 12 can pump the first mother liquid barrel 20, the second mother liquid barrel 21, and the third mother liquid barrel 22. The mother liquid in the three mother liquid barrels 22 is sent to the second ends of the first venturi pump 10, the second venturi pump 11, and the third venturi pump 12, and under the action of pressure, the solution in the main pipeline 72 enters the pipeline of the fertilizer device through the input end 13, and under the action of the first venturi pump 10, the second venturi pump 11, and the third venturi pump 12, the solution in the main pipeline 72 is mixed with the mother liquid in the first mother liquid barrel 20, the second mother liquid barrel 21, and the third mother liquid barrel 22, and enters the output end 14 of the fertilizer device under the pressure of the water pump 50. And because the scheme of the present application is provided with a pressure difference holding device 30, when it is necessary to adjust the mixing ratio of the solution in the main pipeline 72 and the mother liquid in the first mother liquid barrel 20, the second mother liquid barrel 21, and the third mother liquid barrel 22, the pressure difference between the first end and the third end of the first venturi pump 10, the second venturi pump 11, and the third venturi pump 12 is changed by adjusting the pressure difference holding device 30, so as to accurately change the mixing ratio.

[0029] It should be noted that the pressure difference maintaining device needs to be adjusted, and the pressure difference can also be adjusted by changing the suction force of the water pump 50, which is not limited here.

[0030] Figure 2 A schematic structural diagram of a venturi pump of a fertilization device based on a venturi pump precision pressure stabilization bypass according to an embodiment of the present application is shown; Figure 3 FIG. 4 shows a cross-sectional view of another venturi pump of a fertilization device based on a venturi pump precision pressure stabilization bypass according to an embodiment of the present application; Figure 2 and Figure 3 As shown, for the sake of clarity, the structures of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 are described in detail, as follows:

[0031] The structures of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 are all shown in the figure. The first end of the venturi pump is the mixing section, the second end is the diffusion section, and the third end is the contraction section, wherein P1 represents the working liquid pressure, a represents the central angle of the contraction section, φ1 represents the nozzle velocity coefficient, L1 represents the nozzle length diameter, Q1 represents the working fluid flow, Q3 represents the discharge liquid flow, and Q2 represents the suction liquid flow; P2 represents the system fluid pressure, β represents the central angle of the diffusion section, φ2 represents the diffusion section (throat) velocity coefficient, ρ represents the medium density, U5 represents the contraction section inlet velocity, U4 represents the diffusion section outlet velocity, U1 represents the nozzle outlet velocity, U3 represents the mixing section outlet velocity, and Ua represents the mixing section inlet velocity. Pa represents the mixing section inlet pressure, g represents the gravitational acceleration, φ3 represents the diffusion pipe velocity coefficient, D5 represents the contraction section diameter, D4 represents the diffusion section diameter, D1 represents the nozzle outlet diameter, and D3 represents the mixing section diameter. P1-Pa represents the pressure difference between point 1 and point a, P4-Pa represents the calculation factor, P4-Pa represents the pressure difference between point 4 and point 1, and P1-P4 represents the pressure difference between point 1 and point 4; P4 represents the discharge pressure of the mixing section, m represents the throat / nozzle area ratio, φ4 represents the suction speed coefficient, q represents the suction flow rate / working flow rate, A5 represents the area of ​​the contraction section, A4 represents the area of ​​the diffusion section, A1 represents the nozzle cross-sectional area, A3 represents the mixing section area, and Aa represents the mixing section area.

[0032]

[0033]

[0034] As shown in formulas 1-4, by adjusting the mixing section and / or the diffusion section and / or the contraction section of the first venturi pump 10 and the first venturi pump 11, that is, by adjusting the pressure difference between point 1 and point a, the pressure difference between point 4 and point 1, and the pressure difference between point 1 and point 4, the pressure of the first venturi pump 10 and the first venturi pump 11 is adjusted, and then the amount of mother liquid in the first mother liquid barrel 20 and the second mother liquid barrel 21 sucked by the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 is adjusted, which is equivalent to completing the adjustment of the mixing ratio of pesticides or fertilizers.

[0035] For further explanation, the principle of the Venturi pump is further explained as follows:

[0036] The Venturi pump is a centrifugal pump that uses centrifugal force to transfer liquid from a low-pressure area to a high-pressure area. The main components of the pump include the impeller, pump casing, inlet and outlet. The impeller is the core component of the pump. It consists of a series of curved blades and is mounted on the pump shaft. When the pump shaft rotates, the impeller also rotates, causing the liquid to generate centrifugal force, thereby drawing the liquid from the inlet into the pump casing. In the pump casing, the liquid is compressed and pushed toward the outlet, forming high pressure. The principle of the Venturi pump can be expressed by the following formula: Q = TTr2v, where Q represents the flow rate, r represents the impeller radius, and v represents the liquid velocity. According to the formula, the flow rate is proportional to the square of the impeller radius, and the liquid velocity is also proportional. Therefore, increasing the impeller radius or the liquid velocity can increase the flow rate.

[0037] The structure of a Venturi pump is relatively simple, mainly consisting of a pump shaft, an impeller, a pump casing, an inlet, and an outlet. The pump shaft is the central component of the pump, which connects the impeller and the motor. The impeller is the core component of the pump, which consists of a series of curved blades that can rotate. The pump casing is the outer shell of the impeller, which consists of an inlet and an outlet. The inlet is the inlet of the pump, where the liquid enters the pump casing. The outlet is the outlet of the pump, where the liquid exits the pump casing. The structure of the pump is as follows: Figure 2 and Figure 3 shown.

[0038] Venturi pumps are widely used in agriculture, industry and construction to provide water and increase water pressure. In agriculture, Venturi pumps can be used for irrigation, drainage and fertilizer delivery. In industry, Venturi pumps can be used to deliver chemical liquids, oil and natural gas. In construction, Venturi pumps can be used for water supply and drainage of buildings.

[0039] The advantages of the Venturi pump include simple structure, easy maintenance, long service life, stable operation, etc. However, the Venturi pump also has some disadvantages, such as low efficiency, high noise, high energy consumption, etc. Therefore, when choosing a pump, it is necessary to select the appropriate pump type and specifications according to the specific usage and needs.

[0040] The Venturi pump is a widely used fluid machine that uses centrifugal force to transfer liquid from a low-pressure area to a high-pressure area. The pump has the advantages of simple structure, easy maintenance, long service life, and stable operation. When choosing a pump, it is necessary to select the appropriate pump type and specifications according to the specific usage and needs.

[0041] The pressure differential maintaining device is generally composed of a pressure holding valve and a pressure reducing valve, or a pressure reducing valve and an electronic pressure control device.

[0042] Figure 4 FIG. 2 shows a schematic diagram of fertilizer ratio adjustment of a fertilizing device based on a Venturi pump precision pressure stabilization bypass according to an embodiment of the present application; Figure 4As shown, specifically, the solution of the present application can complete the mixing ratio of the solution concentration by changing the ratio of the adjustment time to the overall use time. The specific formula for adjusting the solution concentration is as follows:

[0043]

[0044] Among them, η represents the valve opening, t represents the fertilizer absorption time, and T represents the adjustment cycle.

[0045] The solution of this application has the following specific advantages:

[0046] Secondly, the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 are used to mix the mother liquids in the first mother liquid barrel 20, the second mother liquid barrel 21 and the third mother liquid barrel 22 that need to be mixed. Due to the use principle of the venturi pump, if the concentration of the fertilization liquid needs to be adjusted, it is only necessary to adjust the pressure at both ends of the first venturi pump 10 and the second venturi pump 11. The application principle of the venturi pump is used, that is, the suction force is generated by the water pump 50 to change the pressure difference between the second end and the third end of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12, and the pressure difference between the first end and the third end of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 is changed by the pressure difference holding device 30, so as to simply and accurately complete the adjustment of the fertilizer or pesticide concentration. The present application makes the flow more stable, improves the flow stability of the fertilizer pump, and thus improves the fertilizer-to-fertilizer ratio accuracy.

[0047] Optionally, the types of mother liquids in the first mother liquid barrel 20 and the second mother liquid barrel 21 include at least one of pesticides, fertilizers, and water.

[0048] The types of mother liquids in the first mother liquid barrel 20 and the second mother liquid barrel 21 are limited according to actual needs. For the sake of ease of understanding, at least one of pesticides, fertilizers, and water is used as an example.

[0049] It should be noted that the number of the mother liquid barrels is determined according to actual needs, and the number of the mother liquid barrels corresponds to the number of the Venturi pumps. One Venturi pump corresponds to one mother liquid barrel. The specific capacity of the mother liquid barrel, the setting location, and the mother liquid type are not elaborated here.

[0050] Optionally, the fertilizing device further comprises a pressure relief valve, one end of which is respectively connected to the first end of the first venturi pump 10 , the second venturi pump 11 and the first end of the third venturi pump 12 , and the other end of which is connected to the output end 14 .

[0051] Since the working principle of the first end connection of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 is to generate a pressure difference at both ends of the venturi pump, thereby sucking the mother liquid in the first mother liquid barrel 20, the second mother liquid barrel 21 and the third mother liquid barrel 22 into the first end connection of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12, a pressure relief valve is provided on the channel connecting the first ends of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12, one end of the pressure relief valve is respectively connected to the first end of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12, and the other end of the pressure relief valve is connected to the output end 14, so that the pressure at both ends of the first end connection of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 is changed through the pressure relief valve, thereby changing the mixed concentration of the pesticide or fertilizer.

[0052] Figure 5 FIG. 2 shows a schematic structural diagram of another venturi pump of a fertilization device based on a venturi pump precision pressure stabilization bypass according to an embodiment of the present application; Figure 5 As shown, optionally, the fertilization device further includes a mixing chamber 60 , and the mixing chamber 60 is disposed between the third ends of the first venturi pump 10 , the second venturi pump 11 , and the third venturi pump 12 and the water pump 50 .

[0053] Since there may be undissolved pesticides or fertilizers in the process of mixing fertilizers or pesticides, the solution of the present application adds a mixing chamber 60, which is used to further mix the mixed working fluid, and the mixing chamber 60 can also function as a filter net for filtering the working fluid. The type of the filtering result of the mixing chamber 60 can be a filter net, a filter cotton, or other types of filtering structures, which are not specifically limited here. The number of the mixing chambers 60 can be one or more, and the specific number and type are set according to actual needs. It should be noted that the mixing chamber 60 is used to block undissolved fertilizer or pesticide residues so that the dissolved fertilizer or pesticide residues can pass through unimpeded.

[0054] It is used to make the pesticides or fertilizers liquid after mixing, reduce the solid waste or pesticides entering the pipeline, and thus reduce pipeline blockage.

[0055] Figure 6 FIG. 2 shows a schematic diagram of another fertilization device based on a Venturi pump precision pressure stabilization bypass according to an embodiment of the present application; Figure 6As shown, optionally, the fertilization device also includes a circulation pump 61, the first end of the circulation pump 61 is respectively connected to the first end of the first venturi pump 10, the second venturi pump 11 and the first end of the third venturi pump 12, and the second end of the circulation pump 61 is respectively connected to the output end 14 of the pipeline.

[0056] The circulation pump 61 is arranged between the first ends of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 and the output end 14 of the fertilization device, and is used to remix the mixed solution that originally entered the output end 14 of the fertilization device through the first ends of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12, so that the mixed solution enters the water pump 50 again, thereby accelerating the further mixing of the mixed solution.

[0057] Optionally, the structures of the first Venturi pump 10, the second Venturi pump 11 and the third Venturi pump 12 all include: a contraction section, a mixing section, and a diffusion section, the contraction section is the third end of the first Venturi pump 10, the second Venturi pump 11 and the third Venturi pump 12, the diffusion section is the second end of the first Venturi pump 10, the second Venturi pump 11 and the third Venturi pump 12, and the mixing section is the first end of the first Venturi pump 10, the second Venturi pump 11 and the third Venturi pump 12.

[0058] Optionally, the central angle of the contraction section of the first venturi pump 10 and the second venturi pump 11 is not greater than ninety degrees.

[0059] Optionally, a central angle of a diffusion section of the first venturi pump 10 and the second venturi pump 11 is not greater than ninety degrees.

[0060] The specific angles of the central angles of the divergent sections of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 and the central angles of the contraction sections of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 are determined according to actual needs and are not specifically limited here.

[0061] Optionally, the output end 14 is provided with a water check valve.

[0062] In order to prevent the sucked solution from returning to the fertilizing device, a water check valve is provided at the output end 14, and the water check valve is used to prevent water from returning to the fertilizing device.

[0063] The fertilization device based on the Venturi pump precision pressure stabilization bypass used in the embodiment of the present application comprises: a first mother liquid barrel 20, a second mother liquid barrel 21, a third mother liquid barrel 22, a first Venturi pump 10, a second Venturi pump 11, a third Venturi pump 12, a water pump 50, a pressure difference maintaining device 30 and a pipeline, one end of the pipeline is set as an input end 13, and the other end of the pipeline away from the input end 13 is connected to the first end of the first Venturi pump 10, the second Venturi pump 11 and the third Venturi pump 12 respectively, the second end of the first Venturi pump 10 is connected to the first mother liquid barrel 20, the second end of the second Venturi pump 11 is connected to the second mother liquid barrel 21, the second end of the third Venturi pump 12 is connected to the third mother liquid barrel 22, and the first Venturi pump 10, the second Venturi pump 11 and the third Venturi pump 12 are connected. The third end of the third venturi pump 12 is connected to the water pump 50 through a pipeline, so that the water pump 50 generates suction to change the pressure difference between the second end and the third end of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12. One end of the water pump 50 away from the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 is set as the output end 14; the first ends of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 are connected to the third ends of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 through the pressure difference maintaining device 30 in sequence, so that the pressure difference between the first end and the third end of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 is changed through the pressure difference maintaining device 30. The solution of the present application uses the above-mentioned structure to use the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 to mix the mother liquids in the first mother liquid barrel 20, the second mother liquid barrel 21 and the third mother liquid barrel 22 that need to be mixed. Due to the use principle of the venturi pump, if the concentration of the fertilization liquid needs to be adjusted, it is only necessary to adjust the pressure at both ends of the first venturi pump 10 and the second venturi pump 11. By using the application principle of the venturi pump, that is, the suction force generated by the water pump 50 changes the pressure difference between the second end and the third end of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12, and the pressure difference between the first end and the third end of the first venturi pump 10, the second venturi pump 11 and the third venturi pump 12 is changed by the pressure difference maintaining device 30, thereby simply and accurately completing the adjustment of the fertilizer or pesticide concentration.

[0064] Figure 7 FIG. 4 shows a schematic diagram of a fertilization system based on a Venturi pump precision pressure stabilization bypass according to an embodiment of the present application; Figure 7As shown, an embodiment of the present application provides a fertilization system based on a Venturi pump precision pressure-stabilizing bypass, the precision fertilization system comprising: a second water pump 70, a stop valve 71, a main pipeline 72, a first valve actuator 73, a second valve actuator 74, a third valve actuator 75 and a fertilization device based on a Venturi pump precision pressure-stabilizing bypass as described in any one of the above, the input end 13 and the output end 14 of the fertilization device are respectively connected to the main pipeline 72, the first valve actuator 73, the second valve actuator 74, and the third valve actuator 75 are arranged on the side of the main pipeline 72 close to the input end 13 of the fertilization device, the stop valve 71 is arranged on the input end 13 of the fertilization device, and the second water pump 70 is arranged on the side of the main pipeline 72 close to the output end 14 of the fertilization device, so that the liquid to be fertilized mixed by the fertilization device is transported to the first valve actuator 73, the second valve actuator 74, and the third valve actuator 75 through the main pipeline 72 under the action of the second water pump 70.

[0065] In the main pipeline 72, the solution enters the fertilizing device through the input end 13 of the fertilizing device, and the fertilizing device mixes the pesticide or fertilizer, and the mixed solution containing the pesticide or fertilizer is output to the main pipeline 72 through the output end 14 of the fertilizing device. Under the action of the second water pump 70 of the main pipeline 72, the mixed solution of the pesticide or fertilizer enters the first valve actuator 73, the second valve actuator 74, and the third valve actuator 75. The first valve actuator 73, the second valve actuator 74, and the third valve actuator 75 are arranged in the farmland that needs to be fertilized or irrigated. When the farmland needs to be irrigated, the valve actuator corresponding to the farmland is controlled to open the valve actuator to release the mixed pesticide or fertilizer solution to complete the irrigation of the farmland.

[0066] Specifically, the fertilizer suction flow rate is equal to the pressure of the water pump 50 and the pressure of the flow rate of the main pipeline 72.

[0067] It should be noted that the number and type of the valve actuator are set according to actual needs and are not specifically limited here. As long as the valve actuator is set in the farmland, when the farmland needs to be irrigated, the irrigation can be completed by opening the corresponding valve actuator.

[0068] The systems, devices, modules or units described in the above embodiments may be implemented by computers or their associated components.

[0069] Although not shown, in an embodiment of the present application, a storage medium is provided, which stores a computer program, and the computer program is configured to execute the fertilizer / pesticide concentration adjustment method of the fertilization system based on the precision pressure stabilization bypass of the Venturi pump in any embodiment of the present application when it is run.

[0070] The methods, programs, systems, devices, etc. of the embodiments of the present application may be executed or implemented in a single or multiple networked computers, or may be practiced in a distributed computing environment. In the embodiments of the present specification, in these distributed computing environments, tasks may be performed by remote processing devices connected via a communication network.

[0071] Those skilled in the art should understand that the embodiments of the present specification may be provided as methods, systems or computer program products. Therefore, those skilled in the art may imagine that the functional modules / units or controllers and related method steps described in the above embodiments may be implemented in software, hardware or a combination of software / hardware.

[0072] Unless explicitly stated, the actions or steps of the methods, programs, and embodiments of the present application do not have to be performed in a specific order and can still achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0073] In this article, multiple embodiments of the present application are described, but for the sake of simplicity, the description of each embodiment is not exhaustive, and the same or similar features or parts between the various embodiments may be omitted. In this article, "one embodiment", "some embodiments", "example", "specific example", or "some examples" are intended to be applicable to at least one embodiment or example according to the present application, rather than all embodiments. The above terms do not necessarily mean to refer to the same embodiment or example. In the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0074] The exemplary systems and methods of the present application have been specifically shown and described with reference to the above embodiments, which are merely examples of the best modes for implementing the present systems and methods. It will be appreciated by those skilled in the art that various changes may be made to the embodiments of the systems and methods described herein when implementing the present systems and / or methods without departing from the spirit and scope of the present application as defined in the appended claims.

Claims

1. A fertilization device based on a Venturi pump precision pressure stabilization bypass, characterized in that: The fertilization device comprises: a first mother liquid barrel, a second mother liquid barrel, a third mother liquid barrel, a first venturi pump, a second venturi pump, a third venturi pump, a water pump, a pressure difference maintaining device and a pipeline, one end of the pipeline is set as an input end, the other end of the pipeline away from the input end is connected to the first ends of the first venturi pump, the second venturi pump and the third venturi pump respectively, the second end of the first venturi pump is connected to the first mother liquid barrel, the second end of the second venturi pump is connected to the second mother liquid barrel, the second end of the third venturi pump is connected to the third mother liquid barrel, and the third ends of the first venturi pump, the second venturi pump and the third venturi pump are connected through A pipeline is connected to the water pump so that the water pump generates suction to change the pressure difference between the second end and the third end of the first venturi pump, the second venturi pump and the third venturi pump. One end of the water pump away from the first venturi pump, the second venturi pump and the third venturi pump is set as an output end; the first ends of the first venturi pump, the second venturi pump and the third venturi pump are connected to the third ends of the first venturi pump, the second venturi pump and the third venturi pump through a pressure difference maintaining device in sequence, so that the pressure difference between the first end and the third end of the first venturi pump, the second venturi pump and the third venturi pump is changed through the pressure difference maintaining device.

2. The fertilization device based on the Venturi pump precision pressure stabilization bypass according to claim 1 is characterized in that: The fertilizing device further comprises a pressure relief valve, one end of which is respectively connected to the first end of the first venturi pump, the second venturi pump and the first end of the third venturi pump, and the other end of which is connected to the output end.

3. The fertilization device based on the Venturi pump precision pressure stabilization bypass according to claim 2 is characterized in that: The fertilization device further includes a mixing chamber, which is arranged between the third ends of the first venturi pump, the second venturi pump, and the third venturi pump and the water pump.

4. The fertilization device based on the Venturi pump precision pressure stabilization bypass according to claim 3 is characterized in that: The fertilizing device further includes a circulation pump, a first end of which is respectively connected to the first end of the first venturi pump, the second venturi pump and the third venturi pump, and a second end of which is respectively connected to the output end of the pipeline.

5. The fertilization device based on the Venturi pump precision pressure stabilization bypass according to claim 4 is characterized in that: The structures of the first Venturi pump, the second Venturi pump and the third Venturi pump all include: a contraction section, a mixing section and a diffusion section, the contraction section is the third end of the first Venturi pump, the second Venturi pump and the third Venturi pump, the diffusion section is the second end of the first Venturi pump, the second Venturi pump and the third Venturi pump, and the mixing section is the first end of the first Venturi pump, the second Venturi pump and the third Venturi pump.

6. The fertilization device based on the Venturi pump precision pressure stabilization bypass according to claim 5 is characterized in that: The central angle of the contraction section of the first venturi pump, the second venturi pump and the third venturi pump is no greater than ninety degrees.

7. The fertilization device based on the Venturi pump precision pressure stabilization bypass according to claim 6 is characterized in that: The central angle of the diffusion sections of the first venturi pump, the second venturi pump and the third venturi pump is no greater than ninety degrees.

8. The fertilization device based on the Venturi pump precision pressure stabilization bypass according to claim 7 is characterized in that: The output end is provided with a water check valve.

9. A fertilization system based on a Venturi pump precision pressure stabilization bypass, characterized in that: The fertilization system comprises: a second water pump, a stop valve, a main pipeline, a first valve actuator, a second valve actuator, a third valve actuator and a fertilization device based on a Venturi pump precision pressure-stabilizing bypass as described in any one of claims 1 to 8, wherein the input end and the output end of the fertilization device are respectively connected to the main pipeline, the first valve actuator, the second valve actuator and the third valve actuator are arranged on the side of the main pipeline close to the input end of the fertilization device, the stop valve is arranged on the input end of the fertilization device, and the second water pump is arranged on the side of the main pipeline close to the output end of the fertilization device, so that the liquid to be fertilized mixed by the fertilization device is transported to the first valve actuator, the second valve actuator and the third valve actuator respectively through the main pipeline under the action of the second water pump.

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