Fertilizing device and system based on Venturi pump

Abstract

The utility model discloses a fertilization device and system based on a Venturi pump, and particularly relates to the technical field of agricultural equipment. According to the scheme, through the structure, the Venturi pump is used for mixing mother liquor in the first mother liquor barrel, the second mother liquor barrel and the third mother liquor barrel which need to be mixed with input water, and due to the use principle of the Venturi pump, if the concentration of liquid in the fertilizer applicator needs to be adjusted, the fertilizer can be mixed conveniently; in practical application, the pressure of the first ends of the two Venturi pumps is adjusted through the water pump, so that the pressure difference between the first ends and the second ends of the Venturi pumps is changed, the pressure difference between the first ends and the third ends of the Venturi pumps is changed, and then the fertilizer and water proportion can be adjusted. Therefore, the concentration of the fertilizer or the pesticide can be simply and accurately adjusted. The working fluid is provided for the pump of the main path, so that the pressure at two ends of the equipment is stable, and the pressure difference at two ends of the Venturi pump in the equipment is stable.

Description

Technical Field

[0001] This application relates to the technical field of agricultural equipment, and specifically relates to a fertilizing device and system based on a Venturi pump. Background Art

[0002] In the prior art, agricultural irrigation mainly refers to the watering irrigation operation for farmland or gardens and other crops in the agricultural cultivation area. The irrigation principle is that the irrigation amount, irrigation frequency 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 at 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, it is necessary to adjust the output water pressure during each irrigation so that the amount of water output at the output end meets the actual water demand.

[0003] In the prior art, agricultural irrigation is no longer limited to irrigation water, and can also be used for irrigating pesticides and fertilizers. However, during the process of irrigating pesticides and fertilizers, there will be problems of how to control the concentration of waste or pesticides. In actual applications, generally, the amount of water needed is calculated first, and then the amount of corresponding pesticides or fertilizers is calculated. However, this will not only make the pesticides or fertilizers not stirred evenly and not dissolved thoroughly, resulting in waste of pesticides or fertilizers, but also make the accuracy of the concentration of the finally output pesticide or fertilizer liquid insufficient.

[0004] To solve the above problems, this application proposes a fertilizing device and system based on a Venturi pump to solve the above problems. Utility Model Content

[0005] In a first aspect, an embodiment of this application provides a fertilizing device based on a Venturi pump. The fertilizing device includes: a first water valve, a second water valve, a third water valve, a fourth water valve, a Venturi pump, a check valve, a flow meter, a first flow meter, a second flow meter, a third flow meter, a first mother liquid barrel, a second mother liquid barrel and a third mother liquid barrel; the first end of the Venturi pump is communicated with the output end through a pipeline, and the first water valve is arranged between the first end of the Venturi pump and the output end; the second end of the Venturi pump is communicated with the input end through a pipeline; the third end of the Venturi pump is communicated with the mother liquid node through a pipeline, and the check valve and the flow meter are sequentially arranged between the first end of the Venturi pump and the mother liquid node. The mother liquid node is respectively communicated with a first mother liquid pipeline, a second mother liquid pipeline and a third mother liquid pipeline. Among them, the second water valve, the first flow meter and the first mother liquid barrel are sequentially arranged on the first mother liquid pipeline, the third water valve, the second flow meter and the second mother liquid barrel are sequentially arranged on the second mother liquid pipeline, and the fourth water valve, the third flow meter and the third mother liquid barrel are sequentially arranged on the third mother liquid pipeline.

[0006] Optionally, the fertilizing device further includes a filtering device, which includes a first filtering device, a second filtering device, and a third filtering device. The first filtering device is disposed between the first flowmeter and the first mother liquid tank, the second filtering device is disposed between the second flowmeter and the second mother liquid tank, and the third filtering device is disposed between the third flowmeter and the third mother liquid tank.

[0007] Optionally, the fertilizing device further includes a first stirring device, a second stirring device, and a third stirring device. The first stirring device is disposed in the first mother liquid tank, the second stirring device is disposed in the second mother liquid tank, and the third stirring device is disposed in the third mother liquid tank.

[0008] Optionally, the first flowmeter, the second flowmeter, and the third flowmeter are any one of a float flowmeter, a Hall flowmeter, an optoelectronic flowmeter, and a micro flowmeter.

[0009] Optionally, the Venturi pump structure includes a contraction section, a mixing section, and a diffusion section. The contraction section is the third end of the Venturi pump and the second Venturi pump, the diffusion section is the second end of the Venturi pump and the second Venturi pump, and the mixing section is the first end of the Venturi pump and the second Venturi pump.

[0010] Optionally, the central angle of the diffusion section of the Venturi pump is not greater than ninety degrees, and the central angle of the contraction section of the Venturi pump is not greater than ninety degrees.

[0011] In a second aspect, an embodiment of the present application provides a fertilizing system based on a Venturi pump. The fertilizing system includes: a water bucket, a main pipeline, a fifth water valve, a flow regulating valve, a pressure sensor, a pressure maintaining valve, a first valve actuator, a second valve actuator, a third valve actuator, and the fertilizing device based on a Venturi pump according to any one of the first aspects; the input end and the output end of the fertilizing device are respectively communicated with the main pipeline. The first valve actuator, the second valve actuator, and the third valve actuator are respectively disposed on one side of the main pipeline close to the input end of the fertilizing device. The fifth water valve and the water bucket are sequentially disposed on one side of the main pipeline close to the output end of the fertilizing device. The flow regulating valve and the pressure sensor are sequentially disposed between the output end and the input end of the main pipeline. The pressure maintaining valve is disposed on one side of the main pipeline at the input end and away from the output end, so that the working liquid mixed by the fertilizing device is respectively delivered to the first valve actuator, the second valve actuator, and the third valve actuator through the output end of the fertilizing device, the flow regulating valve, the pressure sensor, and the pressure maintaining valve in sequence.

[0012] The fertilizing device based on a Venturi pump used in the embodiments of the present application, the fertilizing device includes: a first water valve, a second water valve, a third water valve, a fourth water valve, a Venturi pump, a check valve, a flow meter, a first flow meter, a second flow meter, a third flow meter, a first mother liquid barrel, a second mother liquid barrel, and a third mother liquid barrel; the first end of the Venturi pump is communicated with the output end through a pipeline, and the first water valve is arranged between the first end of the Venturi pump and the output end; the second end of the Venturi pump is communicated with the input end through a pipeline; the third end of the Venturi pump is communicated with the mother liquid node through a pipeline, and the check valve and the flow meter are sequentially arranged between the first end of the Venturi pump and the mother liquid node, and the mother liquid node is respectively communicated with a first mother liquid pipeline, a second mother liquid pipeline, and a third mother liquid pipeline, wherein, the second water valve, the first flow meter, and the first mother liquid barrel are sequentially arranged on the first mother liquid pipeline, the third water valve, the second flow meter, and the second mother liquid barrel are sequentially arranged on the second mother liquid pipeline, and the fourth water valve, the third flow meter, and the third mother liquid barrel are sequentially arranged on the third mother liquid pipeline. Through the above structure, the solution of the present application uses a Venturi pump to mix the mother liquid in the first mother liquid barrel, the second mother liquid barrel, and the third mother liquid barrel to be mixed with the input water. Due to the working principle of the Venturi pump, if it is necessary to adjust the concentration of the liquid in the fertilizer applicator, only the pressures at the first end and the second end of the Venturi pump need to be adjusted to complete the adjustment of the fertilizer-water ratio. In practical applications, the pressure at the first end of the Venturi pump is adjusted by a water pump, so as to change the pressure difference between the first end and the second end of the Venturi pump, and change the pressure difference between the first end and the third end of the Venturi pump, so as to simply and accurately complete the adjustment of the concentration of fertilizers or pesticides. The solution of the present application provides working fluid for the pump on the main road, so that the pressures at both ends of the device are stable, and the pressure difference between both ends of the Venturi pump inside the device is ensured to be stable.

[0013] Some of the other optional features and technical effects of the embodiments of the present application are described below, and some can be understood by reading this article. Brief Description of the Drawings

[0014] Hereinafter, the embodiments of the present application will be described in detail with reference to the drawings. The elements shown are not limited by the proportions shown in the drawings. The same or similar reference numerals in the drawings represent the same or similar elements, wherein:

[0015] Figure 1 Shows a schematic diagram of a fertilizing device based on a Venturi pump according to an embodiment of the present application;

[0016] Figure 2 Shows a schematic diagram of the structure of the Venturi pump of another fertilizing device based on a Venturi pump according to an embodiment of the present application;

[0017] Figure 3Shows a cross-sectional view of a Venturi pump of another Venturi pump-based fertilization device according to an embodiment of the present application;

[0018] Figure 4 Shows a schematic diagram of another Venturi pump-based fertilization device according to an embodiment of the present application;

[0019] Figure 5 Shows a schematic diagram of another Venturi pump-based fertilization device according to an embodiment of the present application;

[0020] Figure 6 Shows a schematic diagram of a Venturi pump-based fertilization system according to an embodiment of the present application.

[0021] Reference numerals: 10 - First water valve; 11 - Venturi pump; 12 - Check valve; 13 - Flow meter; 14 - Second water valve; 15 - First flow meter; 16 - First filter device; 17 - First mother liquor tank; 18 - Third water valve; 19 - Second flow meter; 20 - Second filter device; 21 - Second mother liquor tank; 22 - Fourth water valve; 23 - Third flow meter; 24 - Third filter device; 25 - Third mother liquor tank; 26 - First stirring device; 27 - Second stirring device; 28 - Third stirring device; 30 - Water bucket; 31 - Flow regulating valve; 32 - Fifth water valve; 33 - Pressure sensor; 34 - Pressure holding valve; 35 - First valve actuator; 36 - Second valve actuator; 37 - Third valve actuator. Detailed implementation manners

[0022] To make the objectives, technical solutions, and advantages of the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the specific implementation manners and the accompanying drawings. Herein, the illustrative implementation manners of the present application and their descriptions are used to explain the present application, but do not limit the present application.

[0023] The term "including" and its variations used herein represent open inclusion, that is, "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based 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. There may also be other explicit and implicit definitions hereinafter.

[0024] Figure 1 Shows a schematic diagram of a fertilization device based on the Venturi pump 11 according to an embodiment of the present application; as Figure 1As shown in the figure, an embodiment of the present application provides a fertilizing device based on a Venturi pump 11. The fertilizing device includes: a first water valve 10, a second water valve 14, a third water valve 18, a fourth water valve 22, a Venturi pump 11, a check valve 12, a flow meter 13, a first flow meter 15, a second flow meter 19, a third flow meter 23, a first mother liquor barrel 17, a second mother liquor barrel 21, and a third mother liquor barrel 25; the first end of the Venturi pump 11 is communicated with the output end through a pipeline, and the first water valve 10 is arranged between the first end of the Venturi pump 11 and the output end; the second end of the Venturi pump 11 is communicated with the input end through a pipeline; the third end of the Venturi pump 11 is communicated with the mother liquor node through a pipeline, and the check valve 12 and the flow meter 13 are sequentially arranged between the first end of the Venturi pump 11 and the mother liquor node. The mother liquor node is respectively communicated with a first mother liquor pipeline, a second mother liquor pipeline, and a third mother liquor pipeline. Among them, the second water valve 14, the first flow meter 15, and the first mother liquor barrel 17 are sequentially arranged on the first mother liquor pipeline, the third water valve 18, the second flow meter 19, and the second mother liquor barrel 21 are sequentially arranged on the second mother liquor pipeline, and the fourth water valve 22, the third flow meter 23, and the third mother liquor barrel 25 are sequentially arranged on the third mother liquor pipeline.

[0025] In practical applications, the first mother liquor pipeline, the second mother liquor pipeline, and the third mother liquor pipeline are three groups of parallel pipelines. The common connection point of the three groups of mother liquor pipelines is called the mother liquor node. The input end of the Venturi pump 11 is the port where the liquid in the main pipeline is input, and the output end of the Venturi pump 11 is the port where the mixed working fluid is output to the main pipeline.

[0026] For further illustration, the liquid flow path of the fertilizing device is described here. Specifically, when the fertilizing device needs to be used, turn on the water pump, and according to the concentration of the required working fluid and the type of mother liquor, turn on the second water pump, and / or the third water pump, and / or the fourth water pump accordingly. Adjust the pressure at the first end of the Venturi pump 11 through the water pump, so that a pressure difference is generated between the first end and the second end of the Venturi pump 11, and between the first end and the third end, so that the mother liquor in the first mother liquor barrel 17, and / or the second mother liquor barrel 21, and / or the third mother liquor barrel 25 enters the flow meter 13 and the check valve 12 in sequence under the action of pressure and reaches the third end of the Venturi pump 11, and is mixed with the liquid input from the second end of the Venturi pump 11 to form a working fluid.

[0027] In practical applications, if it is necessary to adjust the concentration and type of the working fluid, it is necessary to control the second water pump, and / or the third water pump, and / or the fourth water pump.

[0028] Specifically, for example, the mother liquor 1 is in the first mother liquor barrel 17, the mother liquor 2 is in the second mother liquor barrel 21, and the mother liquor 3 is in the third mother liquor barrel 25. If the required working fluid is a mixture of mother liquor 2 and mother liquor 3 with a concentration ratio of 1:2, then the second water valve 14 needs to be closed, and the opening ratio of the third water valve 18 and the fourth water valve 22 needs to be controlled at 1:2.

[0029] Optionally, if it is necessary to change the concentration of the working fluid, the second water pump, and / or the third water pump, and / or the fourth water pump can be adjusted proportionally. For example, if the required working fluid is a mixture of mother liquor 2 and mother liquor 3 with a concentration ratio of 1:2 and the concentration is reduced by 50%, then the opening degree of the second water valve 14 can be adjusted to 1 / 2 of the original, and the opening degree of the third water valve 18 can be adjusted to 1 / 2 of the original.

[0030] The specific adjustment plan depends on actual needs and is not specifically limited here.

[0031] It should be noted that to adjust the pressure difference between the first end and the second end, or the first end and the third end of the Venturi pump 11, the suction force of the water pump can be changed, or the opening degree of the first water valve 10 can be controlled, or both the suction force of the water pump and the opening degree of the first water valve 10 can be changed to complete the adjustment of the pressure difference between any two ends of the Venturi pump 11.

[0032] Figure 2 FIG. shows a schematic structural diagram of the Venturi pump 11 of another fertilizing device based on the Venturi pump 11 according to an embodiment of the present application; Figure 3 FIG. shows a cross-sectional view of the Venturi pump 11 of another fertilizing device based on the Venturi pump 11 according to an embodiment of the present application; As Figure 2 and Figure 3 shown, for the sake of clear illustration, the structure of the Venturi pump 11 will be described in detail here as follows:

[0033] The structure of the Venturi pump 11 is shown as follows. The first end of the Venturi pump 11 is the mixing section, the second end is the diffuser section, and the third end is the contraction section. Among them, 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 ratio, Q1 represents the working fluid flow rate, Q3 represents the discharged liquid flow rate, Q2 represents the suction liquid flow rate; P2 represents the system fluid pressure, β represents the central angle of the diffuser section, φ2 represents the diffuser section (throat) velocity coefficient, ρ represents the medium density, U5 represents the inlet velocity of the contraction section, U4 represents the outlet velocity of the diffuser section, U1 represents the nozzle outlet velocity, U3 represents the outlet velocity of the mixing section, Ua represents the inlet velocity of the mixing section. Pa represents the inlet pressure of the mixing section, g represents the acceleration due to gravity, φ3 represents the diffuser pipe velocity coefficient, D5 represents the diameter of the contraction section, D4 represents the diameter of the diffuser section, D1 represents the nozzle outlet diameter, D3 represents the diameter of the mixing section. 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, 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 velocity coefficient, q represents the suction flow rate / working flow rate, A5 represents the area of the contraction section, A4 represents the area of the diffuser section, A1 represents the cross-sectional area of the nozzle, A3 represents the area of the mixing section, Aa represents the area of the mixing section.

[0034]

[0035] As shown in Formulas 1 - 4, by adjusting the mixing section and / or the diffuser section and / or the contraction section of the 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 Venturi pump 11 is adjusted, and further, the amount of the mother liquor in the first mother liquor tank 17, the second mother liquor tank 21, and the third mother liquor tank 25 sucked by the Venturi pump 11 is adjusted, which is equivalent to adjusting the mixing ratio of the pesticide or fertilizer.

[0036] For further illustration, the principle of the Venturi pump 11 is further explained as follows:

[0037] The Venturi pump 11 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 an impeller, a pump casing, an inlet, and an outlet. The impeller is the core component of the pump. It consists of a series of curved blades and is installed on the pump shaft. When the pump shaft rotates, the impeller also rotates, causing the liquid to generate centrifugal force, thereby sucking the liquid from the inlet into the pump casing. In the pump casing, the liquid is compressed and pushed towards the outlet, forming high pressure. The principle of the Venturi pump 11 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 also proportional to the liquid velocity. Therefore, increasing the impeller radius or the liquid velocity can increase the flow rate.

[0038] The structure of the Venturi pump 11 is relatively simple and mainly consists of a pump shaft, an impeller, a pump casing, an inlet, and an outlet. The pump shaft is the central component of the pump and it connects the impeller and the motor. The impeller is the core component of the pump. It consists of a series of curved blades and can rotate. The pump casing is the outer shell of the impeller and it consists of an inlet and an outlet. The inlet is the entrance of the pump and the liquid enters the pump casing from here. The outlet is the exit of the pump and the liquid is discharged from the pump casing from here. The structure of the pump is as Figure 2 and Figure 3 shown.

[0039] The Venturi pump 11 is widely used in the fields of agriculture, industry, and construction to provide water sources and increase water pressure. In the agricultural field, the Venturi pump 11 can be used for irrigation, drainage, and the transportation of fertilizers. In the industrial field, the Venturi pump 11 can be used for transporting chemical liquids, petroleum, and natural gas. In the construction field, the Venturi pump 11 can be used for the water supply and drainage of buildings.

[0040] The advantages of the Venturi pump 11 include simple structure, convenient maintenance, long service life, stable operation, etc. However, the Venturi pump 11 also has some disadvantages, such as low efficiency, high noise, high energy consumption, etc. Therefore, when selecting a pump, it is necessary to select a suitable pump type and specification according to the specific usage situation and requirements.

[0041] The Venturi pump 11 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, convenient maintenance, long service life, stable operation, etc. When selecting a pump, it is necessary to select a suitable pump type and specification according to the specific usage situation and requirements.

[0042] The solutions of this application specifically have the following advantages:

[0043] Secondly, the Venturi pump 11 is used to mix the mother liquors in the first mother liquor barrel 17, the second mother liquor barrel 21, and the third mother liquor barrel 25 that need to be mixed. Due to the working principle of the Venturi pump 11, if the concentration of the fertilizing liquid needs to be adjusted, only the pressure at any two ends of the Venturi pump 11 needs to be adjusted. By utilizing the application principle of the Venturi pump 11, that is, the suction generated by the water pump is used to change the pressure difference between the second end and the third end of the second Venturi pump 11, the adjustment of the concentration of fertilizers or pesticides can be simply and accurately completed. This application makes the flow more stable, improves the flow stability of the fertilizer pump, and further improves the accuracy of the fertilizer ratio.

[0044] Optionally, the types of mother liquors in the first mother liquor barrel 17, the second mother liquor barrel 21, and the third mother liquor barrel 25 include at least one of pesticides, fertilizers, and water.

[0045] It should be noted that the number of the mother liquor barrels is determined according to actual needs, and the number of the mother liquor barrels corresponds to the number of the Venturi pumps 11. One Venturi pump 11 corresponds to one mother liquor barrel. The specific capacity, installation position, and type of the mother liquor of the mother liquor barrel will not be elaborated here.

[0046] Figure 4 Fig. shows a schematic diagram of another fertilizing device based on the Venturi pump 11 according to an embodiment of the present application. As Figure 4 shown, optionally, the fertilizing device further includes a first filtering device 16, a second filtering device 20, and a third filtering device 24. The first filtering device 16 is arranged between the first flowmeter 15 and the first mother liquor barrel 17, the second filtering device 20 is arranged between the second flowmeter 19 and the second mother liquor barrel 21, and the third filtering device 24 is arranged between the third flowmeter 23 and the third mother liquor barrel 25.

[0047] The first filtering device 16, the second filtering device 20, and the third filtering device 24 are respectively used to filter impurities or undissolved mother liquor in the mother liquors in the first mother liquor barrel 17, the second mother liquor barrel 21, and the third mother liquor barrel 25.

[0048] Figure 5 Fig. shows a schematic diagram of another fertilizing device based on the Venturi pump 11 according to an embodiment of the present application; as Figure 5 shown, optionally, the fertilizing device further includes a first stirring device 26, a second stirring device 27, and a third stirring device 28. The first stirring device 26 is arranged in the first mother liquor barrel 17, the second stirring device 27 is arranged in the second mother liquor barrel 21, and the third stirring device 28 is arranged in the third mother liquor barrel 25.

[0049] The first stirring device 26, the second stirring device 27, and the third stirring device 28 are provided. The first stirring device 26 is disposed in the first mother liquid barrel 17, the second stirring device 27 is disposed in the second mother liquid barrel 21, and the third stirring device 28 is disposed in the third mother liquid barrel 25. The first stirring device 26, the second stirring device 27, and the third stirring device 28 are respectively used to stir the mother liquid in the first mother liquid barrel 17, the second mother liquid barrel 21, and the third mother liquid barrel 25 to reduce the poorly soluble mother liquid in the mother liquid barrel.

[0050] The type of the filtering device can be a filter net, a filter cotton, or other types of filtering structures, which are not specifically defined herein. The number of the filtering devices can be one or multiple, and the specific number and type are set according to actual needs. It should be noted that the filtering device is used to block undissolved fertilizers or pesticide residues, so that the dissolved fertilizers or pesticide residues can pass through unobstructed.

[0051] It is used to make the pesticides or fertilizers after mixing all be in liquid form, reduce the entry of solid waste or pesticides into the pipeline, and thus reduce pipeline blockage.

[0052] Optionally, the first flowmeter 15, the second flowmeter 19, and the third flowmeter 23 are any one of a float flowmeter 13, a Hall flowmeter 13, an optoelectronic flowmeter 13, and a micro flowmeter 13.

[0053] Optionally, the structures of the venturi pump 11, the second venturi pump 11, and the third venturi pump 11 all include a contraction section, a mixing section, and a diffusion section. The contraction section is the third end of the venturi pump 11 and the second venturi pump 11, the diffusion section is the second end of the venturi pump 11 and the second venturi pump 11, and the mixing section is the first end of the venturi pump 11 and the second venturi pump 11.

[0054] Optionally, the central angle of the diffusion section of the venturi pump 11, the second venturi pump 11, and the third venturi pump 11 is not greater than ninety degrees, and the central angle of the contraction section of the venturi pump 11 and the second venturi pump 11 is not greater than ninety degrees.

[0055] The specific angles of the central angle of the diffusion section and the central angle of the contraction section of the venturi pump 11 are determined according to actual needs and are not specifically defined herein.

[0056] Optionally, a water check valve 12 is provided at the output end.

[0057] In order to prevent the inhaled solution from returning to the fertilizing device, a water check valve 12 is provided at the output end, and the water check valve 12 is used to prevent water from returning to the fertilizing device.

[0058] In the embodiment of the present application, a fertilizing device based on a Venturi pump 11 is used. The fertilizing device includes: a first water valve 10, a second water valve 14, a third water valve 18, a fourth water valve 22, a Venturi pump 11, a check valve 12, a flow meter 13, a first flow meter 15, a second flow meter 19, a third flow meter 23, a first mother liquor barrel 17, a second mother liquor barrel 21, and a third mother liquor barrel 25; the first end of the Venturi pump 11 is communicated with the output end through a pipeline, and the first water valve 10 is arranged between the first end of the Venturi pump 11 and the output end; the second end of the Venturi pump 11 is communicated with the input end through a pipeline; the third end of the Venturi pump 11 is communicated with the mother liquor node through a pipeline, and the check valve 12 and the flow meter 13 are sequentially arranged between the first end of the Venturi pump 11 and the mother liquor node. The mother liquor node is respectively communicated with a first mother liquor pipeline, a second mother liquor pipeline, and a third mother liquor pipeline. Among them, the second water valve 14, the first flow meter 15, and the first mother liquor barrel 17 are sequentially arranged on the first mother liquor pipeline; the third water valve 18, the second flow meter 19, and the second mother liquor barrel 21 are sequentially arranged on the second mother liquor pipeline; the fourth water valve 22, the third flow meter 23, and the third mother liquor barrel 25 are sequentially arranged on the third mother liquor pipeline. Through the above structure, the solution of the present application uses the Venturi pump 11 to mix the mother liquor in the first mother liquor barrel 17, the second mother liquor barrel 21, and the third mother liquor barrel 25 that need to be mixed with the input water. Due to the working principle of the Venturi pump 11, if it is necessary to adjust the concentration of the liquid in the fertilizer applicator, only the pressures at the first end and the second end of the Venturi pump 11 need to be adjusted to complete the adjustment of the fertilizer-water ratio. In practical applications, the pressure at the first end of the Venturi pump 11 is adjusted by a water pump, so as to change the pressure difference between the first end and the second end of the Venturi pump 11, and change the pressure difference between the first end and the third end of the Venturi pump 11, thereby simply and accurately completing the adjustment of the concentration of fertilizers or pesticides. The solution of the present application provides working fluid for the pump on the main road, making the pressures at both ends of the device stable and ensuring the stability of the pressure difference between both ends of the Venturi pump 11 inside the device.

[0059] Figure 6 Fig. shows a schematic diagram of a fertilizing system based on a Venturi pump 11 according to an embodiment of the present application; as Figure 6As shown in the figure, an embodiment of the present application provides a fertilization system based on a Venturi pump 11. The fertilization system includes: a water bucket 30, a main pipeline, a fifth water valve 32, a flow regulating valve 31, a pressure sensor 33, a pressure maintaining valve 34, a first valve actuator 35, a second valve actuator 36, a third valve actuator 37, and the fertilization device based on the Venturi pump 11 described in any one of the above; the input end and the output end of the fertilization device are respectively communicated with the main pipeline, the first valve actuator 35, the second valve actuator 36, and the third valve actuator 37 are respectively arranged on one side of the main pipeline close to the input end of the fertilization device, the fifth water valve 32 and the water bucket 30 are sequentially arranged on one side of the main pipeline close to the output end of the fertilization device, the flow regulating valve 31 and the pressure sensor 33 are sequentially arranged between the output end and the input end on the main pipeline, and the pressure maintaining valve 34 is arranged on one side of the input end of the main pipeline away from the output end, so that the working fluid mixed by the fertilization device is respectively transported to the first valve actuator 35, the second valve actuator 36, and the third valve actuator 37 through the output end of the fertilization device, the flow regulating valve 31, the pressure sensor 33, and the pressure maintaining valve 34 in sequence.

[0060] In the main pipeline, the solution enters the fertilization device through the input end of the fertilization device. The fertilization device mixes pesticides or fertilizers, and then outputs the mixed solution containing pesticides or fertilizers to the main pipeline through the output end of the fertilization device. The fifth water valve 32 and the flow regulating valve 31 are controlled to adjust the flow rate of the main pipeline, so that the working fluid reaches the first valve actuator 35, the second valve actuator 36, and the third valve actuator 37 through the pressure maintaining valve 34. The first valve actuator 35, the second valve actuator 36, and the third valve actuator 37 are arranged in the farmland that needs to be fertilized or irrigated. When irrigation is required for the farmland, the corresponding valve actuator of the farmland is controlled to open, releasing the solution mixed with pesticides or fertilizers to complete the irrigation of the farmland.

[0061] It should be noted that the quantity and type of the valve actuator are set according to actual needs and are not specifically limited herein. As long as the valve actuator is arranged in the farmland and can open the corresponding valve actuator to complete irrigation when irrigation is required for the farmland.

[0062] The systems, devices, modules or units illustrated in the above embodiments can be implemented by a computer or its associated components.

[0063] The methods, programs, systems, devices, etc. of the embodiments of the present application can be executed or implemented in a single or multiple networked computers, and can also be practiced in a distributed computing environment. In the embodiments of this specification, in these distributed computing environments, tasks can be executed by remote processing devices connected through a communication network.

[0064] Those skilled in the art should understand that the embodiments of this specification can be provided as methods, systems, or computer program products. Therefore, those skilled in the art can think that the implementation of the functional modules / units or controllers and related method steps clarified in the above embodiments can be achieved in a software, hardware, or a combination of software and hardware manner.

[0065] Unless explicitly stated, the actions or steps of the methods and programs described according to the embodiments of the present application do not necessarily have to be executed in a specific order and can still achieve the desired results. In some embodiments, multi-tasking and parallel processing are also possible or may be beneficial.

[0066] In this document, multiple embodiments of the present application are described. However, for the sake of brevity, the descriptions of each embodiment are not exhaustive, and the same or similar features or parts between various embodiments may be omitted. In this document, "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean applicable to at least one embodiment or example according to the present application, rather than all embodiments. The above terms do not necessarily mean referring to the same embodiment or example. Without contradiction, those skilled in the art can combine and combine the different embodiments or examples and the features of different embodiments or examples described in this specification.

[0067] The exemplary systems and methods of the present application have been specifically shown and described with reference to the above embodiments, which are only examples of the best modes for implementing the systems and methods. Those skilled in the art can understand that various changes can be made to the embodiments of the systems and methods described herein when implementing the systems and / or methods without departing from the spirit and scope of the present application defined in the appended claims.

Claims

1. A fertilization device based on a Venturi pump, characterized in that: The fertilizing device includes: a first water valve, a second water valve, a third water valve, a fourth water valve, a venturi pump, a check valve, a flow meter, a first flow meter, a second flow meter, a third flow meter, a first mother liquid barrel, a second mother liquid barrel and a third mother liquid barrel; the first end of the venturi pump is connected to the output end through a pipeline, and the first water valve is arranged between the first end of the venturi pump and the output end; the second end of the venturi pump is connected to the input end through a pipeline; the third end of the venturi pump is connected to the mother liquid node through a pipeline, and the check valve and the flow meter are arranged in sequence between the first end of the venturi pump and the mother liquid node, and the mother liquid node is respectively connected to the first mother liquid pipeline, the second mother liquid pipeline and the third mother liquid pipeline, wherein the second water valve, the first flow meter and the first mother liquid barrel are arranged in sequence on the first mother liquid pipeline, the third water valve, the second flow meter and the second mother liquid barrel are arranged in sequence on the second mother liquid pipeline, and the fourth water valve, the third flow meter and the third mother liquid barrel are arranged in sequence on the third mother liquid pipeline.

2. The fertilization device based on the Venturi pump according to claim 1, characterized in that: The fertilizing device also includes a first filter device, a second filter device, and a third filter device. The first filter device is arranged between the first flow meter and the first mother liquid barrel, the second filter device is arranged between the second flow meter and the second mother liquid barrel, and the third filter device is arranged between the third flow meter and the third mother liquid barrel.

3. The fertilization device based on the Venturi pump according to claim 2, characterized in that: The fertilizing device further includes a first stirring device, a second stirring device, and a third stirring device. The first stirring device is arranged in the first mother liquid barrel, the second stirring device is arranged in the second mother liquid barrel, and the third stirring device is arranged in the third mother liquid barrel.

4. The fertilization device based on the Venturi pump according to claim 3, characterized in that: The first flow meter, the second flow meter and the third flow meter are any one of a float flow meter, a Hall flow meter, a photoelectric flow meter and a micro flow meter.

5. The fertilization device based on the Venturi pump according to claim 4, characterized in that: The venturi pump structure includes: a contraction section, a mixing section, and a diffusion section. The contraction section is the third end of the venturi pump and the second venturi pump, the diffusion section is the second end of the venturi pump and the second venturi pump, and the mixing section is the first end of the venturi pump and the second venturi pump.

6. The fertilization device based on the Venturi pump according to claim 5, characterized in that: The central angle of the diffusion section of the Venturi pump is not greater than ninety degrees, and the central angle of the contraction section of the Venturi pump is not greater than ninety degrees.

7. A fertilization system based on a Venturi pump, characterized in that: The fertilization system comprises: a water bucket, a main pipeline, a fifth water valve, a flow regulating valve, a pressure sensor, a pressure holding valve, a first valve actuator, a second valve actuator, a third valve actuator and a fertilization device based on a Venturi pump according to any one of claims 1 to 6; 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 respectively arranged on the side of the main pipeline close to the input end of the fertilization device, the fifth water valve and the water bucket are sequentially arranged on the side of the main pipeline close to the output end of the fertilization device, the flow regulating valve and the pressure sensor are sequentially arranged between the output end and the input end of the main pipeline, and the pressure holding valve is arranged on the input end and the side away from the output end of the main pipeline, so that the mixed working fluid of the fertilization device is transported to the first valve actuator, the second valve actuator and the third valve actuator respectively through the output end of the fertilization device through the flow regulating valve, the pressure sensor and the pressure holding valve.

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