Water, fertilizer and pesticide precise variable application system suitable for garden green land and application of water, fertilizer and pesticide precise variable application system

Abstract

The invention discloses a water, fertilizer and pesticide precise variable application system suitable for a garden green land and application thereof.The system comprises a concentrated solution storage and conveying device, the concentrated solution storage and conveying device comprises a plurality of concentrated solution storage and conveying assemblies, and each concentrated solution storage and conveying assembly comprises a concentrated solution storage tank, a cylinder body, a driver, a piston connecting rod and a piston located in the cylinder body; the concentrated solution storage tank is connected with the cylinder body through a concentrated solution conveying pipeline, one end of the piston connecting rod is connected with the driver, and the other end is connected with the piston; the diluent storing and conveying device is used for storing and conveying the diluent; and the mixing device is connected with the cylinder body and the diluent storing and conveying device. By combining compact design, high-precision control and real-time variable application technologies, the technical problem of small-space and refined application of the garden green land can be comprehensively solved, and excellent beneficial effects are reflected from multiple aspects of resource utilization, space adaptation, automation degree, ecological friendliness and the like.

Description

Technical Field

[0001] The present application relates to the field of precision agriculture and horticultural greening maintenance technology, and more specifically, to a precise variable application system of water, fertilizer and medicine suitable for gardens and green lands and its application. Background Art

[0002] In the maintenance and management of gardens and green spaces, the precise application of water, fertilizers, and pesticides is an important part of ensuring healthy plant growth, achieving landscaping, and improving resource utilization efficiency. Gardens and green spaces usually contain different types of ornamental plants, many of which are valuable plants. The demand for water, fertilizers, and pesticides of these plants varies with the growth stage and the need for pest and disease control. Therefore, precise control of the mixing ratio during application is required to ensure healthy plant growth and pest and disease control.

[0003] The traditional water, fertilizer and medicine application system is mainly used in agricultural field planting. It is usually designed as a large-scale equipment, mainly serving large-scale, single-crop planting scenes. It has a large structure, complex operation, low mixing accuracy requirements, and most water and fertilizer use a fixed ratio, and do not have the ability to flexibly adjust for different plants. For example, CN110731156A discloses a multifunctional water-fertilizer integrated machine, which has the functions of irrigation and fertilization integration, but its volume is large and the structure is complex, making it difficult to install and use in environments with limited space such as urban gardens and landscape green spaces. At the same time, the integrated machine cannot dynamically adjust the water-fertilizer-medicine ratio, and can only fertilize according to a preset ratio, which is not suitable for the diversified plant needs of gardens and green spaces. For another example, CN204719445U discloses an intelligent water-fertilizer integrated control machine, which has an intelligent control function, but is still mainly used in agricultural field scenes and only controls the water-fertilizer ratio.

[0004] It can be seen that in the application of gardens and green spaces, the traditional water, fertilizer and pesticide application system faces significant technical bottlenecks. First, because gardens and green spaces are usually small in area and limited in design space, the installation of large-scale mixing equipment is restricted. The existing mixing system is usually large in size and complex in structure, which is difficult to meet the layout requirements of gardens and green spaces; secondly, the landscape plants in gardens and green spaces are rich in varieties, often with precious plants or special plants. These plants have very precise requirements for the concentration of water, fertilizer and pesticide. The traditional water, fertilizer and pesticide application system usually lacks precise control functions (usually difficult to control the precise application of a single plant or a small range), and it is difficult to adapt to the diversified changes in demand; in addition, the traditional water, fertilizer and pesticide application system mostly adopts extensive mode in fertilization and pesticide application, fails to achieve precise control, and can only make basic adjustments to irrigation frequency and water volume. Due to the limitations of hardware structure, it is impossible to achieve the technical requirements of real-time variable application, and it is impossible to effectively solve the differentiated needs of plants in gardens and green spaces. Therefore, the traditional water, fertilizer and pesticide application system can no longer meet the needs of small-scale and refined application in gardens and green spaces in terms of resource utilization efficiency and application accuracy.

[0005] In response to the above problems, technicians in this field are committed to developing an online mixing system that can accurately match the growth needs of different plants and dynamically adjust the mixing ratio of water, fertilizer and medicine, so as to improve resource utilization efficiency, reduce waste and improve the quality of garden and green space maintenance. Summary of the invention

[0006] In view of the above shortcomings of the prior art, the purpose of this application is to provide a new type of precise variable application system of water, fertilizer and medicine.

[0007] More specifically, to achieve the above objectives, the present application provides a precise variable application system of water, fertilizer and medicine suitable for gardens and green lands, including:

[0008] A concentrated liquid storage and delivery device, comprising a plurality of concentrated liquid storage and delivery components, each of which comprises a concentrated liquid storage tank, a cylinder, a driver, a piston connecting rod and a piston located in the cylinder, the concentrated liquid storage tank is connected to the cylinder through a concentrated liquid delivery pipeline, one end of the piston connecting rod is connected to the driver, and the other end is connected to the piston;

[0009] A diluent storage and delivery device, configured to store and transport the diluent;

[0010] A mixing device is connected to the cylinder and the diluent storage and delivery device.

[0011] Preferably, the cylinder body is also provided with a cylinder body-to-mixer one-way valve and a concentrated liquid storage tank-to-cylinder one-way valve connected to the concentrated liquid delivery pipeline;

[0012] When the driver drives the piston to move upward through the piston connecting rod, the concentrated liquid is sucked into the cylinder through the liquid storage tank to the cylinder one-way valve; when the driver drives the piston to move downward through the piston connecting rod, the concentrated liquid in the cylinder is injected into the mixing device through the cylinder to the mixer one-way valve.

[0013] Preferably, the mixing device comprises a mixer, and the mixer is provided with a diluent inlet and a concentrate inlet;

[0014] The diluent inlet is connected to the diluent storage and delivery device, and the concentrate inlet is connected to the cylinder through the cylinder-to-mixer one-way valve.

[0015] Preferably, a sieve plate is provided inside the mixer, and the sieve plate extends obliquely from below the concentrate inlet to the diluent inlet.

[0016] Preferably, the mixer is cylindrical and has a pipeline inner diameter D, wherein the pipeline inner diameter D satisfies the following formula:

[0017]

[0018] Where Q is the flow rate (m 3 / s); v is the average flow velocity (m / s).

[0019] Preferably, the sieve plate has a pore size d h and pore density N,

[0020] Aperture d h Satisfies the following formula:

[0021]

[0022] Among them, Q h is the flow rate of a single hole; C d is the pore flow coefficient; g is the acceleration due to gravity (9.81 m / s 2 ); H is the pressure head when the liquid passes through the sieve plate (m);

[0023] The pore density N satisfies the following formula:

[0024]

[0025] Among them, A s is the total area of ​​the sieve plate; is the cross-sectional area of ​​a single pore; φ is the porosity (the proportion of the pores occupying the sieve plate).

[0026] Preferably, the sieve plate has an inclination angle θ, and the inclination angle θ satisfies the following formula:

[0027]

[0028] Where ΔP is the pressure drop before and after the sieve hole (Pa); ρ is the liquid density (kg / m 3 ); Q is the total flow (m 3 / s); D is the inner diameter of the pipe (m).

[0029] Preferably, the sieve plate has an inclination angle θ, and the inclination angle θ is in the range of 25°-40°.

[0030] Preferably, the diluent storage and delivery device comprises a diluent storage tank and a liquid pump, the diluent storage tank is connected to the liquid pump via a diluent-to-liquid pump delivery pipeline, and the liquid pump is connected to the mixer via a liquid pump-to-mixer delivery pipeline.

[0031] The present application also provides the application of the above-mentioned precise variable application system of water, fertilizer and medicine suitable for gardens and green spaces in the precise variable application of water, fertilizer and medicine in gardens and green spaces.

[0032] The precise variable application system of water, fertilizer and medicine for gardens and green lands provided by this application has the following technical effects:

[0033] 1. The precise variable application system of water, fertilizer and medicine for gardens and green lands provided in this application is a high-precision online mixing system, which enables the concentrated solution and diluted solution of water, fertilizer and medicine to achieve precise proportion control during the mixing process.

[0034] 2. This application combines a mixing device with a precision one-way valve through a compact modular design, reducing the footprint of the equipment and making it suitable for scenarios such as urban greening, garden landscapes, park lawns, etc. with limited space. It ensures that the equipment can be installed in small areas of gardens and green spaces, and achieves efficient and precise mixing of water, fertilizer and medicine in a limited space, effectively meeting the diverse needs of different plants for nutrition and pest and disease control at different growth stages.

[0035] 3. The precise variable application system of water, fertilizer and medicine suitable for gardens and green spaces of the present application is composed of several independent concentrated liquid storage tanks (such as nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer, pesticides, etc.), high-precision one-way valves, and intelligent mixing devices. It can complete the refined ratio of water, fertilizer and medicine in the same system, effectively improving the accuracy of disease and pest control, so that the system can not only provide basic nutritional support, but also meet the disease control needs of plants.

[0036] 4. Compared with the traditional water, fertilizer and medicine application system (such as CN204719445U, which mainly relies on a venturi tube or a simple stirring device to mix the fertilizer liquid, the mixing uniformity is poor, and it is easy to cause the local fertilization concentration to be too high or too low, affecting the health of plants), this application uses a sieve plate uniform mixing technology, combined with an electric pump with adjustable flow, to ensure that the water, fertilizer and medicine reach a stable and uniform concentration during the mixing process, and finally transport them to the application system, thereby improving the uniformity of fertilization, avoiding fertilizer damage, drug damage, and reducing the waste of water, fertilizer and medicine. Compared with the traditional water, fertilizer and medicine application system, it can reduce the use of chemical fertilizers by 30%-50%, which is in line with the development direction of green agriculture and ecological protection.

[0037] 5. This application provides a precise variable application system for water, fertilizer and medicine suitable for gardens and green lands. It integrates advanced variable control technology to achieve dynamic proportional control of water, fertilizer and medicine. It can adjust the concentration of water, fertilizer and medicine in real time according to the real-time needs of plants such as different plant species, soil conditions, weather conditions, etc., to ensure that each plant obtains the best nutrient supply, and make the maintenance of precious plants more targeted and scientific, thereby optimizing the application effect, improving the growth quality of plants, and effectively preventing and controlling pests and diseases, avoiding the risk of nutrient waste or limited pest and disease management effects due to excessive application. This technological breakthrough is different from traditional fixed-ratio fertilization equipment and enhances the intelligence and adaptability of the system.

[0038] 6. The precise variable application system of water, fertilizer and medicine for gardens and green lands provided by this application has made significant progress in precise control, compact design, intelligent regulation and other aspects, and can effectively solve the problems of difficult application of plant diversity in gardens and green lands, difficult precise variable control, and difficult installation in limited space. The promotion of this hybrid system can effectively reduce the cost of water and fertilizer use in gardens and green lands, improve plant survival rate, and has wide application value in greening projects, gardening companies, high-end agricultural planting enterprises and other industries.

[0039] The concept, specific structure and technical effects of the present application will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of an implementation method of the precise variable application system of water, fertilizer and medicine suitable for gardens and green spaces of the present application.

[0041] Figure 2 yes Figure 1 Schematic diagram of the structure of the concentrated liquid storage and transportation device and the mixing device.

[0042] Figure 3 It is a schematic diagram of the structure of the mixer of the present application.

[0043] Figure 4 yes Figure 3 Schematic diagram of the structure of the mixer from another perspective.

[0044] Figure 5 yes Figure 3 Half-section diagram of the mixer.

[0045] Figure 6 It is a structural schematic diagram of another embodiment of the precise variable application system of water, fertilizer and medicine suitable for gardens and green spaces of the present application.

[0046] Figure 7 It is a structural schematic diagram of another embodiment of the precise variable application system of water, fertilizer and medicine suitable for gardens and green spaces of the present application.

[0047] Among them, 100-concentrate storage and delivery device, 111-first concentrate storage tank, 121-second concentrate storage tank, 131-third concentrate storage tank, 141-fourth concentrate storage tank, 112-first concentrate delivery pipeline, 122-second concentrate delivery pipeline, 132-third concentrate delivery pipeline, 142-fourth concentrate delivery pipeline, 113-first driver, 123-second driver, 133-third driver, 143-fourth driver, 114-first piston connecting rod, 124-second piston connecting rod, 134-third piston connecting rod, 144-fourth piston connecting rod , 115-first piston, 125-second piston, 135-third piston, 145-fourth piston, 116-first cylinder, 126-second cylinder, 136-third cylinder, 146-fourth cylinder, 117-first concentrated liquid storage tank to cylinder one-way valve, 127-second concentrated liquid storage tank to cylinder one-way valve, 137-third concentrated liquid storage tank to cylinder one-way valve, 147-fourth concentrated liquid storage tank to cylinder one-way valve, 118-first cylinder to mixer one-way valve, 128-second cylinder to mixer one-way valve, 138-third cylinder to mixer one-way valve, 148-fourth cylinder to mixer one-way valve;

[0048] 200-diluent storage and delivery device, 201-diluent storage tank, 202-diluent to liquid pump delivery pipeline, 203-liquid pump, 204-liquid pump to mixer delivery pipeline;

[0049] 300 - mixing device, 301 - mixer, 302 - diluent inlet, 303 - sieve plate, 304 - concentrate inlet, 305 - outlet. DETAILED DESCRIPTION

[0050] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0051] It should be understood that although the terms indicating directions, such as "upper", "lower", "left", "right", "inner", "outer", "bottom", etc., are used in the present application to describe various exemplary structural parts and elements in the present application, these terms are used here only for the purpose of convenience of description, and these terms are determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed in the present application can be arranged in different directions, these terms indicating directions are only used as illustrations and should not be regarded as limitations.

[0052] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present application in a schematic manner, and therefore the illustrations only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0053] Some exemplary embodiments of the present application are described for the purpose of explanation, and it should be understood that the present application may be implemented in other ways not specifically shown in the drawings.

[0054] The precise variable application system of water, fertilizer and medicine suitable for gardens and green lands provided in the present application comprises: a concentrated liquid storage and delivery device 100, a diluted liquid storage and delivery device 200 and a mixing device 300.

[0055] The function of the concentrated liquid storage and delivery device 100 is to store the concentrated liquid and deliver the concentrated liquid to the mixer. The concentrated liquid in this application can be various fertilizers for plant growth (such as liquid nitrogen fertilizer, liquid phosphate fertilizer, liquid potassium fertilizer, etc.) or pesticides (such as insecticides, fungicides, etc.).

[0056] The concentrated liquid storage and delivery device 100 includes a plurality of concentrated liquid storage and delivery components, and the number of concentrated liquid storage and delivery components can be determined based on actual conditions. For example, there are 4 in Example 1, 2 in Example 2, and 8 in Example 3. It should be understood that Examples 1-3 do not constitute a limit on the number of concentrated liquid storage and delivery components of the present application. Except for the numerical values ​​provided in Examples 1-3, any numerical values ​​can be selected to meet actual needs.

[0057] Each of the concentrated liquid storage and delivery components includes a concentrated liquid storage tank, a concentrated liquid delivery pipeline, a cylinder, a driver, a piston connecting rod and a piston located in the cylinder. The cylinder is provided with a cylinder-to-mixer check valve and a concentrated liquid storage tank-to-cylinder check valve. One end of the concentrated liquid delivery pipeline is connected to the concentrated liquid storage tank, and the other end is connected to the concentrated liquid storage tank-to-cylinder check valve; one end of the piston connecting rod is connected to the driver, and the other end is connected to the piston, so that when the driver moves linearly, the piston connecting rod and the piston are driven to reciprocate. More specifically, when the driver drives the piston to move upward through the piston connecting rod, the concentrated liquid is sucked into the cylinder through the liquid storage tank-to-cylinder check valve; when the driver drives the piston to move downward through the piston connecting rod, the concentrated liquid in the cylinder is injected into the mixing device through the cylinder-to-mixer check valve. The driver can be an electric linear driver, and its frequency and stroke can be adjusted to control the injection flow and flow rate of the concentrated liquid, so as to achieve accurate delivery of the concentrated liquid.

[0058] The diluent storage and delivery device 200 is used to store the diluent and transport the diluent to the mixing device 300. The diluent is a medium for diluting the concentrate to a target concentration, such as purified water, etc. It should be understood that any liquid that can achieve the dilution function is applicable to this application.

[0059] The diluent storage and delivery device 200 includes a diluent storage tank 201, a diluent-to-liquid pump delivery pipeline 202, a liquid pump 203, and a liquid pump-to-mixer delivery pipeline 204. The diluent is stored in the diluent storage tank 201, which is connected to the liquid pump 203 via the diluent-to-liquid pump delivery pipeline 202, and the liquid pump 203 is connected to the mixing device via the liquid pump-to-mixer delivery pipeline 204, thereby realizing the functions of storing the diluent and transporting the diluent to the mixing device 300.

[0060] The concentrated liquid storage and delivery device 100 and the diluted liquid storage and delivery device 200 ensure that the concentrated liquid can flow into the mixing device 300 synchronously with the diluted liquid, so as to facilitate the uniform mixing of the concentrated liquid and the diluted liquid and ensure that the proportion of the applied liquid meets the required standard.

[0061] The function of the mixing device 300 is to mix the concentrated liquid and the diluent flowing therein uniformly. Specifically, the mixing device 300 includes a mixer 301, which is the core component of the mixing system and is used to mix the concentrated liquid with the diluent. The mixer 301 is provided with a diluent inlet 302 and a concentrated liquid inlet 304. The diluent inlet 302 is connected to the liquid pump to mixer delivery pipeline 204 in the diluent storage and delivery device 200, so that the diluent flows into the mixer 301; the concentrated liquid inlet 304 is connected to the cylinder through the cylinder to mixer one-way valve, so that the concentrated liquid flows into the mixer 301.

[0062] A mesh plate 303 is provided inside the mixer 301, and the mesh plate 303 extends obliquely from below the concentrate inlet 304 to the diluent inlet 302. A mesh plate 303 is provided below each concentrate inlet. If there are multiple concentrate inlets 304, multiple mesh plates 303 are provided inside the mixer 301, and the multiple mesh plates 303 are preferably arranged in parallel. The design of the mesh plate 303 ensures that the distance traveled by the flow path of the concentrate inside the mixer is consistent, effectively avoiding the problem of uneven mixing caused by different liquid paths, so that different types of concentrates can form a uniform concentration of application liquid after being combined with the diluent.

[0063] The mixer 301 is preferably cylindrical in shape and has an inner diameter D (see Figure 5 ), the inner diameter of the pipe D, the aperture d of the sieve plate 303 h (See Figure 5 ), pore density N and the inclination angle θ of the sieve plate (see Figure 5 ) is determined based on the principles of fluid mechanics and the requirement for mixing uniformity.

[0064] 1) Inner diameter D of the mixer 301

[0065] The inner diameter D of the pipeline should meet the flow requirements of fluid transportation and follow the Bernoulli equation and the law of conservation of flow:

[0066] Q=vA

[0067] in:

[0068] Q is the flow rate (m 3 / s)

[0069] v is the average flow velocity (m / s)

[0070] A=πD 2 / 4 is the cross-sectional area of ​​the pipe (m 2 )

[0071] The inner diameter D of the pipe is expressed as:

[0072]

[0073] 2) The aperture of the sieve plate d h

[0074] The aperture of the sieve plate is d h Affected by fluid dynamics and the need for uniform mixing. Calculated according to the pressure drop formula:

[0075]

[0076] in:

[0077] ΔP is the pressure drop across the sieve plate (Pa)

[0078] K is the orifice flow resistance coefficient

[0079] ρ is the liquid density (kg / m 3 )

[0080] v is the liquid velocity (m / s)

[0081] Aperture d h It can be obtained from the orifice flow equation:

[0082]

[0083] in:

[0084] Q h is the flow rate of a single hole

[0085] C d is the orifice flow coefficient

[0086] is the cross-sectional area of ​​a single hole

[0087] g is the acceleration due to gravity (9.81 m / s 2 )

[0088] H is the pressure head when the liquid passes through the sieve plate (m)

[0089] Determine the aperture d h The formula is as follows:

[0090]

[0091] 3) The hole density of the sieve plate N

[0092] The pore density N depends on the total area A of the sieve plate. s and the area of ​​a single hole A h :

[0093]

[0094] where φ is the porosity (the proportion of the pores occupying the sieve plate).

[0095] 4) Inclination angle θ of the sieve plate 303

[0096] The fluid velocity in the mixer is usually affected by the Reynolds number (Re), the mesh diameter (d h ), pipe diameter (D) and other parameters. In actual design, the inclination angle θ of the sieve plate should maximize the turbulence intensity, that is, the turbulence energy dissipation rate ε is the highest:

[0097]

[0098] in:

[0099] C t is the turbulent mixing coefficient (empirical value, usually 0.3-0.6)

[0100] v m is the average flow velocity at the sieve outlet, calculated from the flow equation of the fluid through the sieve:

[0101]

[0102] in:

[0103] C d is the hole flow coefficient (usually 0.6-0.8)

[0104] ΔP is the pressure drop before and after the sieve hole (Pa)

[0105] ρ is the liquid density (kg / m 3 )

[0106] v0 is the main flow velocity, that is, the average flow velocity in the mixer pipe:

[0107]

[0108] in:

[0109] Q is the total flow rate (m 3 / s)

[0110] D is the pipe diameter (m)

[0111] Given the flow rate Q and pipe diameter D, θ can be calculated using the following formula

[0112]

[0113] In actual use, the empirical formula can be used to approximate θ

[0114]

[0115] The inclination angle θ of the sieve plate 303 may also be selected based on empirical values, for example, θ is in the range of 25°-40°.

[0116] Example 1

[0117] This embodiment provides a method for implementing a precise variable application system of water, fertilizer and medicine suitable for gardens and green lands. Figure 1 As shown, the mixing system includes: a concentrate storage and delivery device 100 , a diluent storage and delivery device 200 and a mixing device 300 .

[0118] refer to Figure 1 and Figure 2The concentrated liquid storage and delivery device 100 includes four concentrated liquid storage and delivery components. The first concentrated liquid storage and delivery component includes a first concentrated liquid storage tank 111, a first concentrated liquid delivery pipeline 112, a first cylinder 116, a first driver 113, a first piston connecting rod 114 and a first piston 115 located in the first cylinder 116. The first cylinder 116 is provided with a first cylinder to mixer one-way valve 118 and a first concentrated liquid storage tank to cylinder one-way valve 117. One end of the first concentrated liquid delivery pipeline 112 is connected to the first concentrated liquid storage tank 111, and the other end is connected to the first concentrated liquid storage tank to cylinder one-way valve 117; one end of the first piston connecting rod 114 is connected to the first driver 113, and the other end is connected to the first piston 115, so that when the first driver 113 moves linearly, it drives the first piston connecting rod 114 and the first piston 115 to reciprocate. More specifically, when the first driver 113 drives the first piston 115 to move upward through the first piston connecting rod 114, the concentrated liquid is sucked into the first cylinder 116 through the first liquid storage tank to cylinder one-way valve 117; when the first driver 113 drives the first piston 115 to move downward through the first piston connecting rod 114, the concentrated liquid in the cylinder is injected into the mixer 301 in the mixing device 300 through the first cylinder to mixer one-way valve 118.

[0119] The second concentrate storage and delivery assembly includes a second concentrate storage tank 121, a second concentrate delivery pipeline 122, a second cylinder 126, a second driver 123, a second piston connecting rod 124 and a second piston 125 located in the second cylinder 126. The second cylinder 126 is provided with a second cylinder to mixer one-way valve 128 and a second concentrate storage tank to cylinder one-way valve 127. One end of the second concentrated liquid delivery pipeline 122 is connected to the second concentrated liquid storage tank 121, and the other end is connected to the second concentrated liquid storage tank to cylinder one-way valve 127; one end of the second piston connecting rod 124 is connected to the second driver 123, and the other end is connected to the second piston 125, so that when the second driver 113 moves linearly, it drives the second piston connecting rod 124 and the second piston 125 to reciprocate. More specifically, when the second driver 123 drives the second piston 125 to move upward through the second piston connecting rod 124, the concentrated liquid is sucked into the second cylinder 126 through the second liquid storage tank to cylinder one-way valve 127; when the second driver 123 drives the second piston 125 to move downward through the second piston connecting rod 124, the concentrated liquid in the cylinder is injected into the mixer 301 in the mixing device 300 through the second cylinder to mixer one-way valve 128.

[0120] The third concentrated liquid storage and delivery assembly includes a third concentrated liquid storage tank 131, a third concentrated liquid delivery pipeline 132, a third cylinder 136, a third driver 133, a third piston connecting rod 134 and a third piston 135 located in the third cylinder 136. The third cylinder 136 is provided with a third cylinder to mixer one-way valve 138 and a third concentrated liquid storage tank to cylinder one-way valve 137. One end of the third concentrated liquid delivery pipeline 132 is connected to the third concentrated liquid storage tank 131, and the other end is connected to the third concentrated liquid storage tank to cylinder one-way valve 137; one end of the third piston connecting rod 134 is connected to the third driver 133, and the other end is connected to the third piston 135, so that when the third driver 133 moves linearly, it drives the reciprocating motion of the third piston connecting rod 134 and the third piston 135. More specifically, when the third driver 133 drives the third piston 135 to move upward through the third piston connecting rod 134, the concentrated liquid is sucked into the third cylinder 136 through the third liquid storage tank to cylinder one-way valve 137; when the third driver 133 drives the third piston 135 to move downward through the third piston connecting rod 134, the concentrated liquid in the cylinder is injected into the mixer 301 in the mixing device 300 through the third cylinder to mixer one-way valve 138.

[0121] The fourth concentrated liquid storage and delivery assembly includes a fourth concentrated liquid storage tank 141, a fourth concentrated liquid delivery pipeline 142, a fourth cylinder 146, a fourth driver 143, a fourth piston connecting rod 144 and a fourth piston 145 located in the fourth cylinder 146, and the fourth cylinder 146 is provided with a fourth cylinder to mixer one-way valve 148 and a fourth concentrated liquid storage tank to cylinder one-way valve 147. One end of the fourth concentrated liquid delivery pipeline 142 is connected to the fourth concentrated liquid storage tank 141, and the other end is connected to the fourth concentrated liquid storage tank to cylinder one-way valve 147; one end of the fourth piston connecting rod 144 is connected to the fourth driver 143, and the other end is connected to the fourth piston 145, so that when the fourth driver 143 moves linearly, it drives the reciprocating motion of the fourth piston connecting rod 144 and the fourth piston 145. More specifically, when the fourth driver 143 drives the fourth piston 145 to move upward through the fourth piston connecting rod 144, the concentrated liquid is sucked into the fourth cylinder 146 through the fourth liquid storage tank to cylinder one-way valve 147; when the fourth driver 143 drives the fourth piston 145 to move downward through the fourth piston connecting rod 144, the concentrated liquid in the cylinder is injected into the mixer 301 in the mixing device 300 through the fourth cylinder to mixer one-way valve 148.

[0122] As an example, the first concentrated liquid storage tank 111, the second concentrated liquid storage tank 121, the third concentrated liquid storage tank 131, and the fourth concentrated liquid storage tank 141 can store pesticides, liquid nitrogen fertilizers, liquid phosphate fertilizers, and liquid potash fertilizers, respectively. The first driver 113, the second driver 123, the third driver 133, and the fourth driver 143 are electric linear drivers. By adjusting the frequency and stroke of the electric linear driver, the injection amount and injection speed of each concentrated liquid can be accurately controlled, thereby independently adjusting the flow rate of each concentrated liquid to ensure that the personalized needs of different plants or regions for water, fertilizer, and medicine are met.

[0123] Figure 2 It shows how the concentrate flows through the four cylinders and enters the mixer. By adjusting the stroke of the electric linear drive, the amount of liquid sucked in and discharged at a single time can be precisely controlled to meet the application requirements of different concentrations. For example, when the concentration requirement of fertilizers or pesticides is high, the electric linear drive can be adjusted to a higher frequency and longer stroke mode to increase the injection amount of the concentrate; conversely, when the concentration requirement is low, it can be adjusted to a lower frequency and shorter stroke to reduce the injection amount. The flexibility of the above independent control improves the accuracy and applicability of the system, which is particularly suitable for the maintenance needs of precious plants.

[0124] The diluent storage and delivery device 200 includes a diluent storage tank 201, a diluent-to-liquid pump delivery pipeline 202, a liquid pump 203, and a liquid pump-to-mixer delivery pipeline 204. The diluent is stored in the diluent storage tank 201, which is connected to the liquid pump 203 via the diluent-to-liquid pump delivery pipeline 202, and the liquid pump 203 is connected to the mixer 301 via the liquid pump-to-mixer delivery pipeline 204 and delivers the diluent to the mixer for mixing with the concentrate.

[0125] The mixing device 300 includes a mixer 301, which is a core component of the mixing system and is used to mix the concentrate with the diluent. Figure 3-5 As shown, the main structure of the mixer 301 is preferably cylindrical, and is provided with a diluent inlet 302 and a concentrate inlet 304. The diluent inlet 302 is connected to the liquid pump to mixer delivery pipeline 204 in the diluent storage and delivery device 200, so that the diluent flows into the mixer 301; the concentrate inlet 304 is connected to the cylinder through the cylinder to mixer one-way valve, so that the concentrate flows into the mixer 301.

[0126] A sieve plate 303 is provided inside the mixer 301, and the sieve plate 303 extends obliquely from the bottom of the concentrate inlet 304 to the diluent inlet 302. A sieve plate 303 is provided below each concentrate inlet, so in this embodiment, four sieve plates 303 are provided inside the mixer 301, and the four sieve plates 303 are arranged in parallel. The design of the sieve plate 303 effectively and evenly disperses various types of concentrates to flow to the diluents, avoiding uneven mixing caused by flow differences, thereby ensuring that different concentrates are fully mixed with the diluents, and finally outputting an application liquid with uniform concentration from the outlet 305 of the mixer 301, which is suitable for precise garden and green space application needs.

[0127] Figure 5 The three-dimensional schematic diagram of the half-section of the mixer further shows the specific position and function of the sieve plate inside the mixer, ensuring that different concentrates can be evenly mixed in the mixer. The sieve plate design cleverly guides the even distribution of concentrates and diluents, effectively avoiding stratification, so that the final applied water, fertilizer and medicine solution has a stable and consistent concentration.

[0128] Example of application scenario 1: In a garden, it is necessary to mix water (diluted liquid) with liquid nitrogen fertilizer (urea solution) or liquid pesticide (imidacloprid suspension) and evenly distribute the application liquid through a mixer. The following is an example of parameter calculation for mixing water with common liquid fertilizers and liquid pesticides.

[0129] Mixing of water and liquid nitrogen fertilizer (urea solution):

[0130] Target concentration: 1.5% (mass fraction) urea solution, flow rate requirement: 200L of application liquid per hour. Design mixer parameters, pipe inner diameter D: 30mm, sieve plate aperture d h : 2mm, sieve plate hole density N: 100 holes / m 2 , the inclination angle of the sieve plate is θ: 36°. The specific calculation process is as follows:

[0131] Flow calculation, flow rate v of water in the mixer w =1.5m / s, flow rate v of urea solution u =0.3m / s, target total flow rate Q=200L / h.

[0132] Water is the main component, and urea solution is the secondary component. The required urea solution flow rate is:

[0133] Q u =200×1.5%=3L / h

[0134] Q w =200-3=197L / h

[0135] The inner diameter D of the pipe is calculated using the formula:

[0136]

[0137] Q = 200 L / h = 5.56 × 10 -5 m 3 / s, v = 1.5m / s (assuming water flow rate)

[0138] Calculated:

[0139]

[0140] Sieve plate design, sieve plate aperture d h calculate:

[0141]

[0142] Let Q h =0.03L / s, C d =0.6, H = 0.1m,

[0143]

[0144] Calculation of the hole density N of the sieve plate: Assume the area of ​​the sieve plate A s =0.1m 2 , porosity φ = 0.3,

[0145]

[0146] Calculation of the inclination angle θ of the sieve plate:

[0147] Calculate the main flow rate v0 of water and urea solution:

[0148]

[0149] Calculate the sieve outlet flow rate v m :Assume that the pressure drop before and after the sieve hole ΔP=5000Pa, and the water density ρ=1000kg / m 3 , sieve hole flow coefficient C d =0.7

[0150]

[0151] Calculate the optimal tilt angle θ:

[0152] Using empirical formula

[0153]

[0154] The recommended inclination angle of the sieve plate is 36°. This angle ensures that the urea solution generates sufficient turbulence when mixed with water, thereby distributing it evenly and avoiding local concentrations that are too high or too low.

[0155] The uniformity test is applied to detect the concentration of the solution at the mixer outlet to ensure that the urea concentration is within the range of 1.5% ± 0.1%. The pressure loss test ensures that the design of the sieve plate does not cause a large pressure drop in the water flow and is maintained within 0.05MPa.

[0156] Mixing of water and liquid pesticide (imidacloprid suspension)

[0157] Target concentration: 0.1% (mass fraction) imidacloprid suspension, target flow rate: 100 L / h. Design mixer parameters, pipe inner diameter D: 20 mm, sieve plate aperture d h : 1.5mm, sieve plate hole density N: 150 holes / m 2 , the inclination angle of the sieve plate is θ: 33°. The specific calculation process is as follows:

[0158] Flow calculation, required flow of imidacloprid suspension:

[0159] Q p =100×0.1%=0.1L / h

[0160] Q w =100-0.1=99.9L / h

[0161] The inner diameter D of the pipe is calculated using the formula:

[0162]

[0163] in:

[0164] Q = 100 L / h = 2.78 × 10 -5 m 3 / s

[0165] v=1.2m / s (assuming water flow rate)

[0166] Calculated:

[0167]

[0168] Sieve plate design, sieve plate aperture d h calculate:

[0169]

[0170] Assume Qh = 0.015L / s, Cd = 0.65, H = 0.08m,

[0171]

[0172] Calculation of the hole density N of the sieve plate: Assume that the sieve plate area As = 0.08m 2 , porosity φ = 0.35,

[0173]

[0174] Calculation of the sieve plate inclination angle θ:

[0175] Calculate the main flow rate v0 of water and pesticide:

[0176]

[0177] Calculate the sieve outlet flow rate v m :

[0178] Assume that the pressure drop before and after the sieve hole is ΔP = 4000Pa, and the water density is ρ = 1000kg / m 3 , sieve hole flow coefficient C d =0.65

[0179]

[0180] The optimal inclination angle θ of the sieve plate is calculated using the empirical formula:

[0181]

[0182] Therefore, the inclination angle of the sieve plate is determined to be 33°. This angle can ensure that the imidacloprid suspension is fully mixed with water, avoid stratification due to density differences, stabilize the concentration of the application solution, and ensure that the imidacloprid concentration in the final application solution is within the range of 0.1% ± 0.02%.

[0183] In addition to the above calculation methods, the mixing effect at different angles can be verified through actual flow tests, and the angle can be fine-tuned according to the application accuracy. Computational fluid dynamics (CFD) is used to simulate the flow field and optimize the shape and arrangement of the sieve holes. For mixed liquids with higher or lower concentrations, the tilt angle can be appropriately adjusted, such as between 25° and 40°.

[0184] Example 2

[0185] This embodiment provides another implementation method of a precise variable application system of water, fertilizer and medicine suitable for gardens and green lands. Figure 6 As shown, the mixing system includes: a concentrate storage and delivery device 100 , a diluent storage and delivery device 200 and a mixing device 300 .

[0186] The structure in this embodiment is similar to the structure in Example 1, except that the concentrated liquid storage and delivery device 100 in this embodiment includes two concentrated liquid storage and delivery components, which are particularly suitable for the water, fertilizer and pesticide application needs of light-type gardens and green spaces. The two concentrated liquid storage and delivery components correspondingly include two concentrated liquid storage tanks, for example, storing different types of concentrated pesticides and liquid fertilizers respectively. It is worth noting that for some liquid pesticides or fertilizers, no chemical reaction will occur between the components, so they can be placed in these two concentrated liquid storage tanks. The above design not only improves the efficiency of the system, but also reduces production and operating costs, and is particularly suitable for gardens and green spaces with low application requirements and smaller areas.

[0187] This embodiment reduces the number of liquid storage tanks, simplifies the concentrate delivery pipeline and the related one-way valve configuration, thereby improving the overall efficiency of the system. During operation, the driver adjusts the frequency and stroke to achieve precise injection control of the two concentrates. For example, when only a small amount of fertilizer is required in a certain area, the frequency of the driver can be set to a low-speed mode and the stroke can be shortened to achieve small-dose liquid application. The above flexibility ensures efficient application in different application scenarios.

[0188] In this embodiment, the mixer 301 is also similar to the structure in Embodiment 1, which ensures the uniform mixing of the concentrate and the diluent, making the application effect more ideal. Although this embodiment is simplified in structure, it still retains the function of precise control and fully meets the requirements of light and simple application. This embodiment not only reduces operating costs, but also improves the efficiency and effect of garden green space maintenance, showing strong market application potential.

[0189] Example 3

[0190] This embodiment provides another implementation method of a precise variable application system of water, fertilizer and medicine suitable for gardens and green lands. Figure 7 As shown, the mixing system includes: a concentrate storage and delivery device 100 , a diluent storage and delivery device 200 and a mixing device 300 .

[0191] The structure of this embodiment is similar to that of the embodiment 1, except that the concentrated liquid storage and delivery device 100 in this embodiment includes 8 concentrated liquid storage and delivery components. The design of this embodiment is intended to solve the problem of chemical reactions that may occur during the mixing process of liquid pesticides and liquid fertilizers, which may lead to the loss of active ingredients or even agglomeration of substances, thereby reducing their use effect. Figure 7The structure of this embodiment is clearly shown, and an innovative mixing scheme is proposed to ensure the effectiveness and stability of each component. To this end, this embodiment sets 8 independent concentrated liquid storage and delivery components, each of which corresponds to a specific concentrated pesticide or liquid fertilizer, ensuring that the mixing process with water is carried out independently.

[0192] In the specific operation process, first start a certain concentrated liquid storage and delivery component to mix the corresponding liquid pesticide or fertilizer with a predetermined amount of water. After completing this stage, use the flow control device to stop the operation of the concentrated liquid storage and delivery component to prevent chemical interactions during the subsequent mixing process. Next, start another concentrated liquid storage and delivery component, repeat the same mixing process, and so on, until all 8 components are mixed in turn. The above-mentioned time-sequential mixing strategy effectively avoids the mutual influence between different components, thereby significantly improving the mixing effect of liquid pesticides and fertilizers.

[0193] Compared with traditional water, fertilizer and medicine application systems, this application has significant innovation and practicality, especially in terms of accuracy, cost control and applicability, showing unique beneficial effects. This application controls the delivery and precise mixing of liquids through electric linear drives and one-way valves, so that concentrates and diluents can be efficiently mixed in a compact structure. The clever coordination of pipes, one-way valves and sieve plates between the various components achieves a compact design and efficient variable application, ensuring the installation and operation of the equipment in the limited space of gardens and green spaces, and meeting the precise needs of different plants for water, fertilizers and medicines. The following points detail the advantages of this application compared to the prior art:

[0194] High-precision variable control enables refined application in landscapes and green spaces. The significant advantage of this application in terms of technical effects lies in its high-precision variable control capability for water, fertilizer, and medicine. Unlike traditional water, fertilizer, and medicine application systems, the precise variable application system for water, fertilizer, and medicine in this application can achieve precise proportion adjustment and variable application of water, fertilizer, and medicine concentrates according to the actual needs of different plants in landscapes and green spaces. The prior art can usually only achieve the application of a few concentrations, without considering the diversity of landscape plants and the differential needs of their growth stages. The precise variable application system for water, fertilizer, and medicine in this application can adaptively adjust the mixing ratio based on real-time data, accurately meet the needs of different plants and regions for water, fertilizer, and medicine, and achieve truly personalized application. The combination of this technical means and effect enables this application to better meet the high-precision maintenance requirements of landscapes and green spaces, and is particularly suitable for precise nutrition and pest and disease control of precious plants.

[0195] Compact structural design adapts to the space limitations of gardens and green spaces. This application adopts a compact structural design, which allows the entire water, fertilizer and medicine precision variable application system to be flexibly installed within the limited space of gardens and green spaces. Traditional water, fertilizer and medicine application systems are bulky and usually require open space for installation and operation, which are not suitable for gardens and green spaces with small spaces and complex structures. This application optimizes the structural layout of the equipment and precisely integrates the control system, mixer and one-way valve into a compact device, greatly improving the spatial adaptability of the system. At the same time, the above structural design does not reduce the mixing efficiency and operating accuracy of the equipment. On the contrary, it improves the operating stability and overall performance of the system through a reasonable layout. The coordinated application of the above design means and high-efficiency mixing technology is a combination method that has not been disclosed in the prior art, which significantly improves the applicability and practicality in garden and green space scenarios.

[0196] Reduce resource waste and environmental burden, and enhance eco-friendliness. In terms of resource utilization and environmental protection, this application effectively reduces the waste of water, fertilizer and medicine through precise application, significantly reduces the loss of fertilizers and pesticides and potential pollution to the environment. The concentration control of water, fertilizer and medicine applied by traditional water, fertilizer and medicine application systems is not precise enough, which often leads to excessive use, which not only increases resource costs, but also may have a negative impact on the ecosystem around the gardens and green spaces. This application adjusts the mixing ratio in real time and accurately controls the application amount, so that the amount of water, fertilizer and medicine strictly meets the actual needs of the plants, effectively reducing the pollution burden on the soil and groundwater, and improving the sustainability and eco-friendliness of the gardens and green spaces. The above-mentioned high-efficiency and low-consumption application method transforms the extensive application of the traditional water, fertilizer and medicine application system into precise application, which is an environmental protection effect that has not been achieved by the prior art.

[0197] Effectively improve the maintenance quality and landscape effect of garden and green space plants. The precise variable application technology of this application enables various plants in gardens and green spaces to obtain the most suitable water, fertilizer and medicine concentrations and nutrient supply, significantly improving the growth and health of plants and the effect of disease and pest control. Since this application can be dynamically adjusted according to the growth status of plants and environmental changes, while ensuring the normal growth of plants, it avoids the decline in landscape quality caused by excess or insufficient nutrition to the greatest extent. This not only improves the overall landscape effect of gardens and green spaces, but also has significant advantages in plant protection, providing maintenance managers with a more scientific and accurate plant maintenance plan.

[0198] In summary, the present application combines compact design, high-precision control and real-time variable application technology to form a synergistic relationship of technical means not disclosed in the prior art. It can comprehensively solve the technical problems of small space and refined application in gardens and green spaces, and embodies excellent beneficial effects from multiple angles such as resource utilization, space adaptation, degree of automation and eco-friendliness.

[0199] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A precise variable application system of water, fertilizer and medicine suitable for gardens and green lands, characterized in that: include: A concentrated liquid storage and delivery device (100) comprises a plurality of concentrated liquid storage and delivery components, each of which comprises a concentrated liquid storage tank, a cylinder, a driver, a piston connecting rod and a piston located in the cylinder, the concentrated liquid storage tank is connected to the cylinder via a concentrated liquid delivery pipeline, one end of the piston connecting rod is connected to the driver, and the other end is connected to the piston; A diluent storage and transport device (200), configured to store and transport the diluent; The mixing device (300) is connected to the cylinder and the diluent storage and delivery device (200).

2. The precise variable application system of water, fertilizer and medicine suitable for gardens and green lands as claimed in claim 1, characterized in that: The cylinder body is also provided with a cylinder body to mixer one-way valve and a concentrated liquid storage tank to cylinder body one-way valve connected to the concentrated liquid delivery pipeline; When the driver drives the piston to move upwards through the piston connecting rod, the concentrated liquid is sucked into the cylinder through the liquid storage tank to the cylinder one-way valve; when the driver drives the piston to move downwards through the piston connecting rod, the concentrated liquid in the cylinder is injected into the mixing device (300) through the cylinder to the mixer one-way valve.

3. The precise variable application system of water, fertilizer and medicine suitable for gardens and green lands as claimed in claim 2, characterized in that: The mixing device (300) comprises a mixer (301), and the mixer (301) is provided with a diluent inlet (302) and a concentrate inlet (304); The diluent inlet (302) is connected to the diluent storage and delivery device (200), and the concentrate inlet (304) is connected to the cylinder through the cylinder-to-mixer one-way valve.

4. The precise variable application system of water, fertilizer and medicine suitable for gardens and green lands as claimed in claim 3, characterized in that: A sieve plate (303) is provided inside the mixer (301), and the sieve plate (303) extends obliquely from below the concentrate inlet (304) to the diluent inlet (302).

5. The precise variable application system of water, fertilizer and medicine suitable for gardens and green lands as claimed in claim 4, characterized in that: The mixer (301) is cylindrical and has a pipeline inner diameter D, wherein the pipeline inner diameter D satisfies the following formula: Where Q is the flow rate (m 3 / s); v is the average flow velocity (m / s).

6. The precise variable application system of water, fertilizer and medicine suitable for gardens and green lands as claimed in claim 5, characterized in that: The sieve plate (303) has a pore size d h and pore density N, Aperture d h Satisfies the following formula: Among them, Q h is the flow rate of a single hole; C d is the pore flow coefficient; g is the acceleration due to gravity (9.81 m / s 2 ); H is the pressure head when the liquid passes through the sieve plate (m); The pore density N satisfies the following formula: Among them, A s is the total area of ​​the sieve plate; is the cross-sectional area of ​​a single pore; φ is the porosity (the proportion of the pores occupying the sieve plate).

7. The precise variable application system of water, fertilizer and medicine suitable for gardens and green lands as claimed in claim 6, characterized in that: The sieve plate (303) has an inclination angle θ, and the inclination angle θ satisfies the following formula: Where ΔP is the pressure drop before and after the sieve hole (Pa); ρ is the liquid density (kg / m 3 ); Q is the total flow (m 3 / s); D is the inner diameter of the pipe (m).

8. The precise variable application system of water, fertilizer and medicine suitable for gardens and green lands as claimed in claim 4, characterized in that: The sieve plate (303) has an inclination angle θ, and the inclination angle θ is in the range of 25°-40°.

9. The precise variable application system of water, fertilizer and medicine suitable for gardens and green lands as claimed in claim 3, characterized in that: The diluent storage and delivery device (200) comprises a diluent storage tank (201) and a liquid pump (203); the diluent storage tank (201) is connected to the liquid pump (203) via a diluent-to-liquid pump delivery pipeline (202); and the liquid pump is connected to the mixer (301) via a liquid pump-to-mixer delivery pipeline (204).

10. Application of the precise variable application system of water, fertilizer and medicine suitable for landscapes and green lands as claimed in any one of claims 1 to 9 in the precise variable application of water, fertilizer and medicine in landscapes and green lands.

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