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

Abstract

The utility model discloses a water, fertilizer and pesticide precise variable application system suitable for a garden green land, and the system comprises a concentrated solution storage and conveying device which comprises a plurality of concentrated solution storage and conveying assemblies, 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 particularly, to a water, fertilizer and pesticide precision variable application system suitable for garden green space and application thereof. BACKGROUND

[0002] In the maintenance and management of garden green space, the precise application of water, fertilizer and pesticide is an important link to ensure the healthy growth of plants, achieve landscape beautification and improve resource utilization efficiency. Garden green space usually contains different types of ornamental plants, many of which are rare plants. The demand for water, fertilizer and pesticide varies with the growth stage and pest control needs, so precise control of the mixing ratio at the time of application is required to ensure the healthy growth of plants and the effectiveness of pest control.

[0003] Traditional water, fertilizer and pesticide application systems are mainly used in agricultural fields and are usually designed as large equipment, mainly serving large-area, single-crop planting scenarios. They have a large structure and complex operation, with low mixing precision requirements and fixed water and fertilizer ratios, and lack the ability to adjust to different plants. For example, CN110731156A discloses a multifunctional water and fertilizer integrated machine, which has irrigation and fertilization integration functions, but its volume is large and its structure is complex, making it difficult to install and use in limited space environments such as urban gardens and landscape green spaces. Meanwhile, the integrated machine cannot dynamically adjust the water, fertilizer and pesticide ratio and can only fertilize according to the preset ratio, which is not suitable for the diverse plant needs of garden green space. For another example, CN204719445U discloses an intelligent water and fertilizer integrated control machine, which has intelligent control functions but is mainly used in agricultural field scenarios and only controls the water and fertilizer ratio.

[0004] It can be seen that in the application of garden green space, traditional water, fertilizer and pesticide application systems face significant technical bottlenecks. First, due to the small area and limited design space of garden green space, the installation of large mixing equipment is restricted, and existing mixing systems are usually large in volume and complex in structure, making it difficult to meet the layout needs of garden green space. Second, garden green space has a wide variety of landscape plants, often including rare or special plants, which require precise concentration of water, fertilizer and pesticide. Traditional water, fertilizer and pesticide application systems usually lack precise control functions (usually difficult to control precise application for single plants or small areas), making it difficult to adapt to diverse demand changes. In addition, traditional water, fertilizer and pesticide application systems use a rough mode in fertilization and pesticide application, failing to achieve precise control and only being able to make basic adjustments to irrigation frequency and water volume. Due to hardware structure limitations, they cannot meet the technical needs of real-time variable application and effectively address the differentiated needs of plants in garden green space. Therefore, traditional water, fertilizer and pesticide application systems cannot meet the needs of small-scale and fine application in garden green space in terms of resource utilization efficiency and application precision.

[0005] In view of the above problems, the skilled in the art is committed to developing an online mixing system capable of accurately matching the growth needs of different plants and dynamically adjusting the mixing ratio of water, fertilizer and pesticide, so as to improve resource utilization efficiency, reduce waste and improve the quality of garden green space maintenance. SUMMARY

[0006] In view of the above shortcomings of the prior art, the purpose of the present application is to provide a novel water, fertilizer and pesticide precise variable application system.

[0007] More specifically, to achieve the above-mentioned purpose, the present application provides a water, fertilizer and pesticide precise variable application system suitable for garden green space, comprising:

[0008] The concentrated liquid storage and conveying device comprises a plurality of concentrated liquid storage and conveying assemblies, 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 with the cylinder through a concentrated liquid conveying pipeline. One end of the piston connecting rod is connected with the driver, and the other end is connected with the piston.

[0009] The dilute liquid storage and conveying device is arranged to store and transport dilute liquid.

[0010] The mixing device is connected with the cylinder and the dilute liquid storage and conveying device.

[0011] Preferably, the cylinder is further provided with a cylinder-to-mixer one-way valve and a concentrated liquid storage tank-to-cylinder one-way valve connected with the concentrated liquid conveying 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 storage tank-to-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-mixer one-way valve.

[0013] Preferably, the mixing device comprises a mixer, and the mixer is provided with a dilute liquid inlet and a concentrated liquid inlet.

[0014] The dilute liquid inlet is connected with the dilute liquid storage and conveying device, and the concentrated liquid inlet is connected with the cylinder through the cylinder-to-mixer one-way valve.

[0015] Preferably, the inside of the mixer is provided with a sieve plate, which extends obliquely from below the concentrated liquid inlet to the dilute liquid 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] wherein 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 a pore density N,

[0020] The pore size d h satisfies the following formula:

[0021]

[0022] wherein Q h is the flow rate of a single hole; C d is the hole flow coefficient; g is the acceleration of gravity (9.81 m / s 2 ); H is the pressure head of the liquid passing through the sieve plate (m);

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

[0024]

[0025] wherein A s is the total area of the sieve plate; is the cross-sectional area of a single hole; φ is the porosity (the proportion of holes occupying the sieve plate).

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

[0027]

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

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

[0030] Preferably, the dilution liquid storage and conveying device comprises a dilution liquid storage tank and a liquid pump, the dilution liquid storage tank is connected to the liquid pump through a dilution liquid to liquid pump conveying pipeline, and the liquid pump is connected to the mixer through a liquid pump to mixer conveying pipeline.

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

[0032] The water, fertilizer and pesticide precision variable application system suitable for garden green land provided by the application has the following technical effects:

[0033] 1. The water, fertilizer and pesticide precision variable application system suitable for garden green land provided by the application is a high-precision online mixing system, which can achieve precise proportion control of the concentrated solution and the dilute solution of water, fertilizer and pesticide in the mixing process.

[0034] 2. The application combines the mixing device with the precision check valve through compact modular design, reduces the equipment floor area, and makes it suitable for scenarios such as urban greening, garden landscape and park lawn with limited space, so as to ensure that the equipment can meet the requirements of small-area installation in garden green land and realize efficient and accurate proportion mixing of water, fertilizer and pesticide in limited space, thereby effectively meeting the diversified needs of different plants for nutrition and pest control in different growth stages.

[0035] 3. The water, fertilizer and pesticide precision variable application system suitable for garden green land provided by the application is composed of a plurality of independent concentrated liquid storage tanks (such as nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer and pesticide), a high-precision check valve and an intelligent mixing device, which can complete the fine proportioning of water, fertilizer and pesticide in the same system, effectively improve the precision of pest control, and make the system not only provide basic nutritional support but also meet the needs of plant disease control.

[0036] 4. Compared with the traditional water, fertilizer and pesticide application system (such as CN204719445U, which mainly relies on a Venturi tube or a simple stirring device to mix the fertilizer solution, and has poor mixing uniformity, which may cause local over-concentration or under-concentration of fertilizer, affecting plant health), the application ensures that the water, fertilizer and pesticide reach a stable and uniform concentration in the mixing process through the screen mesh plate uniform mixing technology combined with the flow-adjustable electric pump, and finally are delivered to the application system, thereby improving the fertilizer uniformity, avoiding fertilizer damage and pesticide damage, and reducing the waste of water, fertilizer and pesticide. Compared with the traditional water, fertilizer and pesticide application system, the use amount of chemical fertilizer can be reduced by 30%-50%, which meets the development direction of green agriculture and ecological protection.

[0037] 5. The water, fertilizer and pesticide precision variable application system suitable for garden green land provided by the application integrates advanced variable control technology to realize dynamic proportion control of water, fertilizer and pesticide, can adjust the concentration of water, fertilizer and pesticide in real time according to the real-time needs of different plant species, soil conditions and weather conditions, so as to ensure that each plant obtains the best nutrient supply, and the maintenance of precious plants is more targeted and scientific, thereby optimizing the application effect, improving the growth quality of plants, effectively preventing and controlling pests and diseases, and avoiding the risk of nutrient waste or limited pest and disease management effect caused by excessive application. This technical breakthrough is different from the traditional fixed-proportion fertilization equipment and enhances the intelligence and adaptability of the system.

[0038] 6、The water, fertilizer and pesticide precision variable application system suitable for garden green land provided by the application has significant progress in precise control, compact design and intelligent adjustment, and can effectively solve the problems of difficult application, difficult precision variable control and difficult installation due to limited space of garden green land plants with diversity. The popularization of the mixed system can effectively reduce the use cost of water and fertilizer of garden greening, improve the survival rate of plants, reduce environmental pollution, meet the national ecological protection policy, and has wide application value for government greening projects, horticultural companies and high-end agricultural planting enterprises.

[0039] The concept, specific structure and generated technical effects of the application will be further described below in combination with the drawings to fully understand the purpose, features and effects of the application. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a structural schematic diagram of an embodiment of the water, fertilizer and pesticide precision variable application system suitable for garden green land of the application.

[0041] Figure 2 is Figure 1 a structural schematic diagram of the concentrated liquid storage and conveying device and the mixing device in

[0042] Figure 3 is a structural schematic diagram of the mixer of the application.

[0043] Figure 4 is Figure 3 a structural schematic diagram of another view of the mixer in

[0044] Figure 5 is Figure 3 a half-section schematic diagram of the mixer in

[0045] Figure 6 is a structural schematic diagram of another embodiment of the water, fertilizer and pesticide precision variable application system suitable for garden green land of the application.

[0046] Figure 7 is a structural schematic diagram of another embodiment of the water, fertilizer and pesticide precision variable application system suitable for garden green land of the application.

[0047] Wherein, 100 - concentrated liquid storage and delivery device, 111 - first concentrated liquid storage tank, 121 - second concentrated liquid storage tank, 131 - third concentrated liquid storage tank, 141 - fourth concentrated liquid storage tank, 112 - first concentrated liquid delivery pipeline, 122 - second concentrated liquid delivery pipeline, 132 - third concentrated liquid delivery pipeline, 142 - fourth concentrated liquid 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 - dilute liquid storage and delivery device, 201 - dilute liquid storage tank, 202 - dilute liquid to liquid pump delivery pipeline, 203 - liquid pump, 204 - liquid pump to mixer delivery pipeline;

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

[0050] The present application is described herein with reference to specific embodiments thereof which are illustrated in the attached drawings. These embodiments are described in detail to enable practitioners in the art to practice the application in various embodiments, and it is understood that the descriptions given herein are not to be taken as limiting the application. Although specific embodiments of the application can be illustrated and described herein, it is well understood that various present embodiments are not limited to the subject matter specifically described herein exemplifications of the inventive subject matter herein described are shown by way of illustration in the drawings herein, and it is understood that various present embodiments can be practiced within the scope of the claims following herein, and are therefore not limited to the subject matter specifically described herein. Moreover, any combination of the features and elements, whether specified and described herein or not, can be taken. It is also understood that, unless otherwise indicated herein, the singular forms of the words "a," "an" and "the" include plural referents.

[0051] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. It is also possible in the present application that terms could be used in the context of this disclosure whose meanings have not been conventionally used within the relevant art and that the specifics of a particular terminology can be modified by this very context.

[0052] It is to be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concepts of the present application, and only the components related to the present application are shown in the diagrams, rather than being drawn according to the number, shape and size of the components in actual implementation, and the type, number and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type can also be more complex.

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

[0054] The water, fertilizer and pesticide precision variable application system for gardens and green spaces provided by the present application comprises a concentrated liquid storage and delivery device 100, a dilute liquid storage and delivery device 200 and a mixing device 300.

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

[0056] The concentrated liquid storage and delivery device 100 comprises a plurality of concentrated liquid storage and delivery assemblies. The number of concentrated liquid storage and delivery assemblies can be determined according to 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 limitation on the number of concentrated liquid storage and delivery assemblies of the present application. In addition to the values provided in Examples 1-3, any value can be selected to meet actual needs.

[0057] Each of the concentrated liquid storage and delivery assemblies comprises a concentrated liquid storage tank, a concentrated liquid delivery pipeline, a cylinder, a driver, a piston connecting rod and a piston in the cylinder. The cylinder is provided with a cylinder-to-mixer one-way valve and a concentrated liquid storage tank-to-cylinder one-way 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 one-way valve. One end of the piston connecting rod is connected to the driver, and the other end is connected to the piston. Thus, when the driver moves linearly, it drives the reciprocating motion of the piston connecting rod and the piston. 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 concentrated liquid storage tank-to-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-mixer one-way valve. The driver can be an electric linear driver, and both the frequency and the stroke can be adjusted to control the injection flow and flow rate of the concentrated liquid, thus achieving precise 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 concentrated liquid to a target concentration, such as purified water, etc. It should be understood that as long as the liquid can achieve the function of dilution, it can be applied to the present 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 through the diluent-to-liquid pump delivery pipeline 202, and the liquid pump 203 is connected to the mixing device through the liquid pump-to-mixer delivery pipeline 204, thus achieving the function of storing the diluent and transporting the diluent to the mixing device 300.

[0060] The concentrated liquid storage and delivery device 100 and the diluent storage and delivery device 200 ensure that the concentrated liquid can flow into the mixing device 300 synchronously with the diluent, facilitating uniform mixing of the concentrated liquid and the diluent, and ensuring that the proportion of the application liquid meets the required standard.

[0061] The mixing device 300 is used 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 and 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 a cylinder-to-mixer one-way valve, so that the concentrated liquid flows into the mixer 301.

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

[0063] The mixer 301 is preferably cylindrical in the present application and has a pipeline inner diameter D (see Figure 5 ), a hole diameter d h (see Figure 5 ), a hole density N, and an oblique angle θ of the sieve plate (seeFigure 5 The mathematical expression of (2) is determined based on the principles of fluid mechanics and the requirement of uniform mixing.

[0064] 1) The pipe inner diameter D of the mixer 301

[0065] The pipe inner diameter D should meet the flow requirement of fluid delivery, following the Bernoulli equation and the law of conservation of flow:

[0066] Q = vA

[0067] Where:

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

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

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

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

[0072]

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

[0074] The hole diameter d of the sieve plate h is influenced by fluid dynamics and the requirement of uniform mixing. It is calculated according to the pressure drop formula:

[0075]

[0076] Where:

[0077] ΔP is the pressure drop on 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 flow rate (m / s)

[0081] The hole diameter d h can be obtained from the orifice flow equation:

[0082]

[0083] Where:

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

[0085] C d is the orifice flow coefficient

[0086] A 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 of the liquid as it passes through the sieve plate (m)

[0089] The hole diameter d is determined h The formula is as follows:

[0090]

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

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

[0093]

[0094] where φ is the porosity (the proportion of holes to the sieve plate).

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

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

[0097]

[0098] where:

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

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

[0101]

[0102] where:

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

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

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

[0106] v0 is the main flow rate, i.e. the average flow rate within the mixer pipe:

[0107]

[0108] where:

[0109] Q is the total flow rate (m3 / s) 3

[0110] D is the pipe diameter (m)

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

[0112]

[0113] In practical use, the angle θ can be approximated using an empirical formula

[0114]

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

[0116] Example 1

[0117] This embodiment provides an implementation of a water, fertilizer and pesticide precision variable application system suitable for garden green space. As shown in the figure, the mixing system comprises: a concentrated liquid storage and conveying device 100, a dilute liquid storage and conveying device 200 and a mixing device 300. Figure 1

[0118] Referring to Figure 1 and Figure 2 ​​, the concentrated liquid storage and delivery device 100 comprises four concentrated liquid storage and delivery assemblies, the first concentrated liquid storage and delivery assembly comprises a first concentrated liquid storage tank 111, a first concentrated liquid delivery pipe 112, a first cylinder 116, a first driver 113, a first piston connecting rod 114 and a first piston 115 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 pipe 112 is connected with the first concentrated liquid storage tank 111, and the other end is connected with the first concentrated liquid storage tank to cylinder one-way valve 117; one end of the first piston connecting rod 114 is connected with the first driver 113, and the other end is connected with the first piston 115, so that when the first driver 113 linearly moves, the first piston connecting rod 114 and the first piston 115 are driven 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 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 concentrated liquid storage and delivery assembly comprises a second concentrated liquid storage tank 121, a second concentrated liquid delivery pipe 122, a second cylinder 126, a second driver 123, a second piston connecting rod 124 and a second piston 125 in the second cylinder 126, the second cylinder 126 is provided with a second cylinder to mixer one-way valve 128 and a second concentrated liquid storage tank to cylinder one-way valve 127. One end of the second concentrated liquid delivery pipe 122 is connected with the second concentrated liquid storage tank 121, and the other end is connected with the second concentrated liquid storage tank to cylinder one-way valve 127; one end of the second piston connecting rod 124 is connected with the second driver 123, and the other end is connected with the second piston 125, so that when the second driver 113 linearly moves, the second piston connecting rod 124 and the second piston 125 are driven 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 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 concentrate storage and delivery assembly includes a third concentrate storage tank 131, a third concentrate delivery conduit 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 concentrate storage tank-to-cylinder one-way valve 137. One end of the third concentrate delivery conduit 132 is connected to the third concentrate storage tank 131, and the other end is connected to the third concentrate 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 third piston connecting rod 134 and the third piston 135 to move reciprocally, more specifically, when the third driver 133 drives the third piston 135 to move upward through the third piston connecting rod 134, the concentrate is sucked into the third cylinder 136 through the third 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 concentrate 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 concentrate storage and delivery assembly includes a fourth concentrate storage tank 141, a fourth concentrate delivery conduit 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, the fourth cylinder 146 is provided with a fourth cylinder-to-mixer one-way valve 148 and a fourth concentrate storage tank-to-cylinder one-way valve 147. One end of the fourth concentrate delivery conduit 142 is connected to the fourth concentrate storage tank 141, and the other end is connected to the fourth concentrate 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 fourth piston connecting rod 144 and the fourth piston 145 to move reciprocally, more specifically, when the fourth driver 143 drives the fourth piston 145 to move upward through the fourth piston connecting rod 144, the concentrate is sucked into the fourth cylinder 146 through the fourth 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 concentrate 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 fertilizer, liquid phosphorus fertilizer, and liquid potassium fertilizer, 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 individual needs of different plants or regions for water, fertilizer, and pesticides are met.

[0123] Figure 2 It is shown how the concentrated liquid flows in the four cylinders and enters the mixer. By adjusting the stroke of the electric linear driver, the amount of liquid inhaled and expelled at a time can be accurately controlled to adapt to the application needs of different concentrations. For example, when the concentration requirement of the fertilizer or pesticide is high, the electric linear driver can be adjusted to a higher frequency and long-stroke mode to increase the injection amount of the concentrated liquid; conversely, in the case of low concentration requirement, it can be adjusted to a lower frequency and short-stroke to reduce the injection amount. The flexibility of the above independent control improves the accuracy and applicability of the system, especially for the maintenance needs of rare plants.

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

[0125] 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 dilute liquid. The specific structure of the mixer is shown in Figures 3-5 The main structure of the mixer 301 is preferably cylindrical, and a dilute liquid inlet 302 and a concentrated liquid inlet 304 are provided thereon. The dilute liquid inlet 302 is connected to the liquid pump to mixer delivery pipeline 204 in the dilute liquid storage and delivery device 200, so that the dilute liquid 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.

[0126] The interior of the mixer 301 is provided with a sieve plate 303, which extends obliquely from below the concentrated liquid inlet 304 to the diluent inlet 302. Each concentrated liquid inlet is provided with a sieve plate 303 below it, so that the interior of the mixer 301 in this embodiment is provided with four sieve plates 303, which are arranged in parallel. The design of the sieve plate 303 effectively and uniformly disperses the flow of various concentrated liquids to the diluent, avoiding uneven mixing caused by flow differences, thereby ensuring that different concentrated liquids and diluents are fully mixed, and ultimately outputting a uniform concentration of application liquid from the outlet 305 of the mixer 301, suitable for precise garden green space application requirements.

[0127] Figure 5 The mixer half-section three-dimensional schematic view shown further demonstrates the specific position and function of the sieve plate inside the mixer, ensuring that different concentrated liquids can be uniformly mixed inside the mixer. The sieve plate is designed to cleverly guide the uniform distribution of concentrated liquid and diluent, effectively avoiding stratification, so that the final application of water, fertilizer and pesticide solution has a stable and consistent concentration.

[0128] Application scenario one example: in the garden green space, water (diluent) and liquid nitrogen fertilizer (urea solution) or liquid pesticide (imidacloprid suspension) need to be mixed and uniformly distributed by the mixer. The following is a specific example of parameter calculation for the mixing of water and common liquid fertilizer and liquid pesticide.

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

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

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

[0132] Water is the main component, and the required urea solution flow is:

[0133] Q u =200x1.5%=3L / h

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

[0135] Pipe diameter D calculation, using the formula:

[0136]

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

[0138] Calculated:

[0139]

[0140] Screen plate design, screen plate aperture d h Calculation:

[0141]

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

[0143]

[0144] Screen plate hole density N calculation: Let screen plate area A s = 0.1 m 2 , porosity φ = 0.3,

[0145]

[0146] Screen plate inclination angle θ calculation:

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

[0148]

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

[0150]

[0151] Calculate the optimal inclination angle θ:

[0152] Use the empirical formula

[0153]

[0154] The recommended inclination angle of the screen plate is 36°. This angle ensures that the urea solution produces sufficient turbulence when mixed with water, resulting in uniform distribution and avoiding local over-concentration or under-concentration.

[0155] The application uniformity test was conducted to ensure the concentration of the solution at the outlet of the mixer was within 1.5% ± 0.1%. The pressure loss test was conducted to ensure the design of the screen plate did not cause a large pressure drop in the water flow, keeping it within 0.05 MPa.

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

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

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

[0159] Q p = 100 x -0.1% = 0.1 L / h

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

[0161] Pipe inner diameter D calculation, using the formula:

[0162]

[0163] Where:

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

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

[0166] The calculation was as follows:

[0167]

[0168] Screen plate design, screen plate hole diameter d calculation: h

[0169]

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

[0171]

[0172] Screen plate hole density N calculation: let screen plate area As = 0.08 m 2 , porosity φ = 0.35, ​​

[0173]

[0174] The screen hole plate inclination angle θ calculation:

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

[0176]

[0177] Calculate the screen hole outlet flow rate v m :

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

[0179]

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

[0181]

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

[0183] In addition to the above calculation method, the mixing effect under different angles can also be verified through actual flow testing, and the angle can be fine-tuned according to the application precision. Flow field simulation is performed using computational fluid dynamics (CFD) to optimize the screen hole shape and arrangement. For higher or lower concentration of mixed liquid, the inclination angle can be adjusted appropriately, such as between 25° and 40°.

[0184] Example 2

[0185] This embodiment provides another implementation of a water, fertilizer, and pesticide precision variable application system suitable for gardens and green spaces. As shown in Figure 6 the mixing system includes a concentrated liquid storage and delivery device 100, a dilute liquid storage and delivery device 200, and a mixing device 300.

[0186] The structure in this embodiment is similar to that in Embodiment 1, except that the concentrated liquid storage and delivery device 100 in this embodiment includes two concentrated liquid storage and delivery assemblies, which are particularly suitable for the water, fertilizer and pesticide application requirements of light and simple gardens. The two concentrated liquid storage and delivery assemblies correspondingly include two concentrated liquid storage tanks, for example, to store different types of concentrated pesticides and liquid fertilizers respectively. It is worth noting that for some liquid pesticides or fertilizers, there is no chemical reaction between the components, so they can be placed in the two concentrated liquid storage tanks. The above design not only improves the efficiency of the system, but also reduces the production and operation cost, and is particularly suitable for gardens with low application requirements and small area.

[0187] This embodiment simplifies the concentrated liquid delivery pipeline and the related one-way valve configuration by reducing the number of liquid storage tanks, 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 concentrated liquids. For example, when a small amount of fertilizer needs to be applied in a certain area, the frequency of the driver can be set to low speed mode, and the stroke is 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 uniform mixing of the concentrated liquid and the diluent, making the application effect more ideal. Although this embodiment is simplified in structure, it still retains the function of precise control, fully meeting the light and simple application requirements. This embodiment not only reduces operating costs, but also improves the efficiency and effect of garden maintenance, showing strong market application potential.

[0189] Embodiment 3

[0190] This embodiment provides another implementation of a water, fertilizer and pesticide precise variable application system suitable for gardens. As shown in Figure 7 The mixing system includes a concentrated liquid storage and delivery device 100, a diluent storage and delivery device 200, and a mixing device 300.

[0191] The structure in this embodiment is similar to that in Embodiment 1, except that the concentrated liquid storage and delivery device 100 in this embodiment includes eight concentrated liquid storage and delivery assemblies. The design of this embodiment aims to solve the problem of chemical reactions that may occur during the mixing of liquid pesticides and liquid fertilizers, which can cause loss of active ingredients or even clumping of substances, thereby reducing their use effect. Figure 7The structure of the embodiment is clearly shown, and an innovative mixing scheme is proposed to ensure the effectiveness and stability of each component. To this end, the embodiment provides eight independent concentrate storage and delivery assemblies, each corresponding to a specific concentrated pesticide or liquid fertilizer, ensuring that the mixing process is independent of water.

[0192] In the specific operation process, first, start a certain concentrate storage and delivery assembly 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 concentrate storage and delivery assembly to prevent chemical interaction in the subsequent mixing process. Next, start another concentrate storage and delivery assembly and repeat the same mixing process, and so on, until all eight components are sequentially mixed. The above 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 pesticide application systems, the present application has significant innovation and practicality, especially in terms of accuracy, cost control and applicability. The present application controls the delivery and precise mixing of liquids through electric linear actuators and check valves, allowing concentrated and diluted liquids to be efficiently mixed in a compact structure. The clever cooperation between the components through pipes, check valves and screen plates realizes compact design and efficient variable application, ensuring the installation and operation of the equipment in limited space of garden green space, and meeting the precise needs of different plants for water, fertilizer and pesticide. The following points explain the advantages of the present application compared with the prior art:

[0194] High-precision variable control for fine application in garden green space. The significant advantage of the present application in terms of technical effect is its high-precision water, fertilizer and pesticide variable control capability. Unlike traditional water, fertilizer and pesticide application systems, the present application's water, fertilizer and pesticide precise variable application system can adjust the precise proportion of water, fertilizer and pesticide concentrates and realize variable application according to the actual needs of different plants in garden green space. The prior art usually only allows a few concentrations to be applied and does not consider the diversity of plants in garden green space and the different needs of different growth stages, while the present application's water, fertilizer and pesticide precise variable application system can adaptively adjust the mixing ratio according to real-time data to accurately meet the water, fertilizer and pesticide needs of different plants and different areas, realizing true individualized application. The combination of this technical means and effect enables the present application to better meet the high-precision maintenance requirements of garden green space, especially suitable for precise nutrition and pest control of valuable plants.

[0195] The compact structure design adapts to the space limitation of the garden green land. The application adopts a compact structure design, so that the whole water, fertilizer and pesticide precision variable application system can be flexibly installed in the limited space of the garden green land. The traditional water, fertilizer and pesticide application system is bulky, and usually needs an open space for installation and operation, which is not suitable for the garden green land scene with small space and complex structure. The application optimizes the structural layout of the equipment, and precisely integrates the control system, the mixer and the one-way valve in a compact device, which greatly improves the space adaptability of the system. At the same time, the above-mentioned structural design does not reduce the mixing efficiency and operation precision of the equipment, but improves the operation stability and overall performance of the system. The above-mentioned design means and high-efficiency mixing technology are cooperated, which is a combination way not disclosed in the prior art, and significantly improves the applicability and practicality in the garden green land scene.

[0196] The application reduces resource waste and environmental burden, and enhances ecological friendliness. In terms of resource utilization and environmental protection, the application effectively reduces the waste of water, fertilizer and pesticide through precise application, significantly reduces the loss of chemical fertilizer and pesticide and the potential pollution to the environment. The concentration control of water, fertilizer and pesticide applied by the traditional water, fertilizer and pesticide application system is not accurate enough, which often leads to overuse, increases the resource cost, and may have negative effects on the ecosystem around the garden green land. The application adjusts the mixing ratio in real time, accurately controls the application amount, so that the amount of water, fertilizer and pesticide strictly meets the actual needs of plants, effectively reduces the pollution burden on soil and groundwater, and improves the sustainability and ecological friendliness of the garden green land. The above-mentioned efficient and low-consumption application method changes the extensive application of the traditional water, fertilizer and pesticide application system to precise application, which is an environmental protection effect not achieved by the prior art.

[0197] The application effectively improves the maintenance quality and landscape effect of plants in the garden green land. The precise variable application technology of the application enables various plants in the garden green land to obtain the most suitable water, fertilizer and pesticide concentration and nutrient supply, significantly improving the growth and health of plants and the pest control effect. Since the application can be dynamically adjusted according to the growth state of plants and environmental changes, it can ensure the normal growth of plants while avoiding the decline of landscape quality caused by excessive or insufficient nutrients. This not only improves the overall landscape effect of the garden green land, but also has significant advantages in plant protection, providing a more scientific and precise plant maintenance scheme for maintenance managers.

[0198] In summary, the application combines compact design, high-precision control and real-time variable application technology to form a cooperative relationship of technical means not disclosed in the prior art, which can fully solve the technical problems of small space and fine application in the garden green land, and has excellent beneficial effects from the aspects of resource utilization, space adaptability, automation degree and ecological friendliness.

[0199] The above embodiments are only illustrative of the principles of the present application and its effects, and are not intended to limit the present application. Any modification or change made by any person skilled in the art without departing from the spirit and scope of the present application shall be covered by the claims of the present application.

Claims

1. A water, fertilizer and pesticide precision variable application system suitable for garden green space, characterized in that, The application relates to a concentrated liquid storage and delivery device (100), a diluent storage and delivery device (200) and a mixing device (300). The concentrated liquid storage and delivery device (100) comprises a plurality of concentrated liquid storage and delivery assemblies, each of which comprises a concentrated liquid storage tank, a cylinder, a driver, a piston connecting rod and a piston located in the cylinder, wherein the concentrated liquid storage tank is connected with the cylinder through a concentrated liquid delivery pipeline, one end of the piston connecting rod is connected with the driver and the other end is connected with the piston. The diluent storage and delivery device (200) is arranged for storing and transporting diluent. The mixing device (300) is connected with the cylinder and the diluent storage and delivery device (200). 2.The precision variable application system for water, fertilizer and pesticide in gardens and green spaces according to claim 1, characterized in that, The cylinder is further provided with a cylinder-to-mixer one-way valve and a concentrated liquid storage tank-to-cylinder one-way valve connected with the concentrated liquid delivery pipeline. When the driver drives the piston to move upward through the piston connecting rod, concentrated liquid is sucked into the cylinder through the concentrated liquid storage tank-to-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 (300) through the cylinder-to-mixer one-way valve. 3.The precision variable application system for water, fertilizer and pesticide in gardens and green spaces according to claim 2, characterized in that, The mixing device (300) comprises a mixer (301), wherein the mixer (301) is provided with a diluent inlet (302) and a concentrated liquid inlet (304). The diluent inlet (302) is connected with the diluent storage and delivery device (200) and the concentrated liquid inlet (304) is connected with the cylinder through the cylinder-to-mixer one-way valve.

4. The water, fertilizer and pesticide precision variable application system suitable for gardens and green spaces according to claim 3, characterized in that, The inside of the mixer (301) is provided with a sieve plate (303) which extends obliquely from below the concentrated liquid inlet (304) to the diluent inlet (302). 5.The precision variable application system for water, fertilizer and pesticide in gardens and green spaces according to 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 precision variable application system for water, fertilizer and pesticide in gardens and green spaces according to claim 5, characterized in that, The sieve plate (303) has a hole diameter d h and a hole density N, Aperture d h satisfies the following equation: where Q h is the flow rate of a single aperture; C d is the aperture flow coefficient; g is the acceleration due to gravity (9.81 m / s 2 ); H is the pressure head of the liquid as it passes through the sieve plate (m); The hole density N satisfies the following formula: where A s is the total area of the sieve plate; is the cross-sectional area of a single hole; and φ is the porosity (the proportion of holes occupying the sieve plate). 7.The water, fertilizer and pesticide precision variable application system for gardens and green spaces of claim 6, wherein, The sieve plate (303) has an oblique angle theta which satisfies the following formula: where ΔP is the pressure drop across the screen (Pa); p is the liquid density (kg / m 3 ); Q is the total flow rate (m 3 / s); and D is the pipe internal diameter (m). 8.The precision variable application system for water, fertilizer and pesticide in gardens and green spaces of claim 4, wherein, The sieve plate (303) has an oblique angle theta which is in the range of 25-40 degrees. 9.The precision variable application system for water, fertilizer and pesticide in gardens and green spaces according to claim 3, characterized in that, The diluent storage and delivery device (200) comprises a diluent storage tank (201) and a liquid pump (203), wherein the diluent storage tank (201) is connected with the liquid pump (203) through a diluent-to-liquid pump delivery pipeline (202) and the liquid pump is connected with the mixer (301) through a liquid pump-to-mixer delivery pipeline (204).

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