Plant protection blade-free online mixer

Abstract

The embodiment of the invention provides a blade-free online mixer for plant protection, which comprises a main mixing pipeline, a plurality of pipe wall linings, a plurality of pipe wall linings and a plurality of pipe wall linings, the first end of the main mixing pipeline is provided with a diluted carrier inlet and a concentrated solution inlet, and the second end of the main mixing pipeline is provided with an outlet; and the air pump is connected with an electromagnetic valve, the electromagnetic valve is connected with an air pressure pipeline, the air pressure pipeline communicates with the multiple pipe wall linings, and the electromagnetic valve is used for controlling on-off and the flow direction of high-pressure air in the air pressure pipeline so that the pipe wall linings can be switched between the contraction state and the expansion state. The electromagnetic valve is used for controlling the on-off and the flow direction of high-pressure gas leading to the multiple pipe wall linings in the air pressure pipeline, so that the pipe wall linings are switched between the contraction state and the expansion state, the movement of the pipe wall linings can generate large shearing force and disturbance, even when high-viscosity liquid is treated, the liquid mixing uniformity can be guaranteed, and the liquid mixing efficiency is improved. Therefore, the use effect is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of smart agricultural technology, and in particular to a bladeless online mixer for crop protection. Background Art

[0002] The water-fertilizer and water-pharmaceutical online mixing devices currently used in the market are usually borrowed from the static online mixers in the chemical industry. However, traditional static mixers have exposed significant limitations in agricultural applications and cannot meet the diversified needs of modern agricultural production. First, there are many types of liquid fertilizers and pesticides used in agricultural production, and their physical properties (such as viscosity, density, fluidity, etc.) vary greatly. Traditional static online mixers rely on the tangential mixing principle of fixed blades and fluids. For liquids with significant viscosity differences, it is difficult to achieve uniform mixing of the above different types of liquids using a specific type of static mixer. The equipment design lacks flexibility and is difficult to cope with the mixing requirements of high-viscosity liquid fertilizers and low-viscosity pesticides, which often leads to uneven mixing and affects the application effect. In addition, different types of pesticides and fertilizers may undergo chemical reactions when mixed, generating precipitates or other adverse reaction products, thereby reducing the activity of the active ingredients, causing waste of fertilizers and pesticides, and even causing pesticide damage to crops. Secondly, the fixed blade design of traditional static mixers easily leaves a large amount of fertilizer and pesticide residue after the mixing operation. These residues are not only difficult to remove, but may also react with the newly added liquid during the subsequent mixing process, further reducing the effectiveness of the new round of applications. This residue problem increases the difficulty of cleaning and maintenance of the equipment, resulting in low equipment utilization efficiency, while increasing operating costs and waste of resources. Summary of the invention

[0003] In view of this, an embodiment of the present specification provides a bladeless in-line mixer for plant protection, which is configured by arranging multiple pipe wall bushings inside a main mixing pipe and simultaneously arranging an air pump connected to the multiple pipe wall bushings. An electromagnetic valve is used to control the on-off and flow direction of high-pressure gas in the air pressure pipeline leading to the multiple pipe wall bushings, so that the pipe wall bushings can be switched between a contracted state and an expanded state. Since the movement of the pipe wall bushings can generate greater shear force and disturbance, the uniformity of liquid mixing can be ensured even when processing high-viscosity liquids, thereby greatly improving the use effect.

[0004] The embodiments of this specification provide the following technical solutions: a bladeless inline mixer for plant protection, comprising a main mixing pipe, a first end of which is provided with a dilution carrier inlet and a concentrate inlet, a second end of which is provided with an outlet, and further comprising:

[0005] A plurality of pipe wall liners, each of which is disposed inside the main mixing pipe, and each of which can be switched between a contracted state and an expanded state;

[0006] An air pump is connected to a solenoid valve, which is connected to a pneumatic pipeline. The pneumatic pipeline is connected to multiple pipe wall sleeves, and the solenoid valve is used to control the on-off and flow direction of the high-pressure gas in the pneumatic pipeline so that the pipe wall sleeve can be switched between a contracted state and an expanded state.

[0007] Preferably, the pneumatic pipeline includes a first pneumatic pipeline and a second pneumatic pipeline, and the tube wall bushing includes a first tube wall bushing and a second tube wall bushing, the first tube wall bushing is connected to the first pneumatic pipeline, and the second tube wall bushing is connected to the second pneumatic pipeline.

[0008] Preferably, the first tube wall bushing and the second tube wall bushing are arranged alternately.

[0009] Preferably, the solenoid valve is connected to the first air pressure pipeline and the second air pressure pipeline, and the solenoid valve is a pneumatic two-position three-way solenoid valve. The solenoid valve periodically switches the air flow direction through a preset electrical control signal, and alternately provides air pressure to the first air pressure pipeline and the second air pressure pipeline.

[0010] Preferably, the first tube wall bushing is made of food-grade silicone;

[0011] And / or, the second tube wall bushing is made of food-grade silicone.

[0012] Preferably, the main mixing pipe is a stainless steel pipe with an inner diameter of 160 mm and a wall thickness of 3 mm to 4 mm.

[0013] Preferably, a plurality of the pipe wall liners are evenly distributed inside the main mixing pipe.

[0014] Preferably, 16 pipe wall bushings are provided, the length of the main mixing pipe is 1000 mm, the outer diameter of the pipe wall bushing is fixed at 160 mm, the inner diameter of the pipe wall bushing is 120 mm when in a contracted state, and the inner diameter of the pipe wall bushing is 60 mm when in an expanded state.

[0015] Preferably, 8 pipe wall bushings are provided, the length of the main mixing pipe is 900 mm, the outer diameter of the pipe wall bushing is fixed at 160 mm, the inner diameter of the pipe wall bushing is 120 mm when in a contracted state, and the inner diameter of the pipe wall bushing is 60 mm when in an expanded state.

[0016] Preferably, four pipe wall bushings are provided, the length of the main mixing pipe is 800 mm, the outer diameter of the pipe wall bushing is fixed at 160 mm, the inner diameter of the pipe wall bushing is 138 mm when in a contracted state, and the inner diameter of the pipe wall bushing is 94 mm when in an expanded state.

[0017] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0018] By arranging multiple pipe wall bushings inside the main mixing pipe and arranging air pumps connected to the multiple pipe wall bushings, the on-off and flow direction of the high-pressure gas in the air pressure pipeline leading to the multiple pipe wall bushings are controlled by an electromagnetic valve, so that the pipe wall bushings can be switched between a contracted state and an expanded state. Since the movement of the pipe wall bushings can generate greater shear force and disturbance, the uniformity of liquid mixing can be guaranteed even when processing high-viscosity liquids, thereby greatly improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the bladeless inline mixer for plant protection provided in this application;

[0021] Figure 2 is a cross-sectional view of the bladeless inline mixer for plant protection provided by the present application;

[0022] Figure 3 It is a partial cross-sectional view of the bladeless inline mixer for plant protection provided by the present application;

[0023] Figure 4 It is a structural schematic diagram of the tube wall sleeve of the plant protection bladeless inline mixer provided by the present application in a contracted state;

[0024] Figure 5 It is a structural schematic diagram of the expanded state of the pipe wall sleeve of the plant protection bladeless inline mixer provided by the present application;

[0025] Figure 6 It is a schematic diagram of the structure of eight pipe wall bushings of the plant protection bladeless inline mixer provided in this application;

[0026] Figure 7 It is a schematic diagram of the structure of four pipe wall bushings of the bladeless inline mixer for plant protection provided by the present application;

[0027] Figure 8 It is a schematic structural diagram of the plant protection bladeless inline mixer provided by the present application, in which the pipe wall bushing is in a contracted state with a smaller inner and outer diameter ratio;

[0028] Fig. 9It is a structural schematic diagram of the expanded state of the pipe wall sleeve of the bladeless inline mixer for plant protection provided by the present application, which has a smaller inner and outer diameter ratio.

[0029] In the figure, 1a, dilution carrier inlet; 1b, concentrate inlet; 2, main mixing pipe; 3a, first air pressure pipeline; 3b, second air pressure pipeline; 4a, first pipe wall bushing; 4b, second pipe wall bushing; 5, outlet; 6, solenoid valve; 7, air pump. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0031] The following describes the implementation methods 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. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, 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, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0032] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functions other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0033] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0034] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0035] In the process of modern agricultural production, the scientific management and efficient use of water, fertilizer and pesticides are becoming increasingly important. Especially in facility agriculture, the online mixing technology of water, fertilizer and pesticides is gradually gaining attention. The goal of this technology is to improve the yield and quality of crops by optimizing the use of water, fertilizer and pesticides, while reducing resource waste and environmental pollution. However, the static online mixers currently commonly used in the market are mainly derived from the chemical industry and are usually only suitable for mixing liquids with similar physical properties. This type of equipment shows obvious limitations when dealing with fertilizers and pesticides of different concentrations, viscosities and physical properties in agricultural production.

[0036] In the prior art, static inline mixers are widely used in chemical and other industrial fields, and they mainly rely on fixed internal blades to achieve liquid mixing. These blades are usually designed as a multi-level structure, using the shear force and rotational flow of the fluid to enhance the mixing effect. Its design is relatively simple, the manufacturing cost is low, and because it has no moving parts and has low maintenance requirements, it has been widely used in chemical production, especially for mixing liquids with relatively uniform physical properties, such as different types of solvents or low-viscosity chemical solutions. However, in agricultural applications, the mixing requirements of liquid fertilizers and pesticides are more complex and diverse than in the chemical field. Liquid fertilizers and pesticides often have significantly different physical properties. For example, concentrated liquid fertilizers usually have a higher viscosity, are rich in organic matter and minerals, and have a certain particle size; while concentrated pesticides may be low-viscosity solutions or emulsions with higher fluidity. In addition, the chemical composition of liquid fertilizers and pesticides is also different, and different components may react during the mixing process, resulting in chemical instability. For example, calcium and magnesium ions in some liquid fertilizers may react with phosphate compounds in pesticides to form precipitates that are insoluble in water, which not only reduces the activity of the active ingredients, but may also clog the mixer and application equipment. For the above reasons, the application of traditional static in-line mixers in the agricultural field faces many challenges. First, it is difficult for a certain type of traditional mixer to effectively handle the mixing of different high-viscosity liquids with low-viscosity liquids, resulting in uneven mixing and failure to ensure uniformity and effectiveness of application. This unevenness may cause crops in some areas to not get enough fertilizer or pesticides, while other areas may be over-applied, resulting in resource waste and potential environmental pollution problems. Second, because liquid fertilizers and pesticides may undergo adverse chemical reactions in the mixer, in addition, the fixed blades of the static mixer will inevitably have fertilizer or pesticide residues during use. These residues are difficult to clean due to the tiny grooves on the surface of the blades and the narrow space between the blades, especially when dealing with liquids with higher viscosity or containing particles. These residues may not only cause cross-contamination in subsequent mixing operations, affecting the purity of the new batch of mixtures, but may also react chemically with the newly added liquid, further reducing the effectiveness of the mixture. Due to these problems, the application of static in-line mixers in the agricultural field is greatly limited.

[0037] Therefore, the limitations of existing technologies indicate that there is an urgent need for a new type of equipment in agricultural facilities that can flexibly cope with the mixing needs of liquids with different physical properties, especially in achieving online mixing of water, fertilizers and pesticides while avoiding cross contamination and chemical reactions to ensure efficient and accurate application of pesticides and fertilizers. In order to meet these challenges, the market and researchers urgently need a new type of online mixing equipment that can efficiently mix water, fertilizers and pesticides of various viscosities and concentrations and avoid cross contamination.

[0038] After extensive and in-depth experiments, the inventor designed a bladeless in-line mixer for plant protection.

[0039] More specifically, the solutions adopted by the present invention include: it solves the problems that traditional static mixers cannot overcome through innovative structural design. The mixer uses the contraction and expansion of the tube wall bushing to achieve liquid mixing, avoiding the use of traditional blades and fundamentally eliminating the pollution problem caused by blade residues. The frequency and amplitude of the tube wall bushing can be adjusted according to the physical properties of different liquids to ensure that liquids of different viscosities and concentrations can achieve the best mixing effect. At the same time, during the contraction and expansion process, the tube wall bushing can effectively remove any residue on its surface, ensuring the purity of subsequent mixing operations, technically overcoming many shortcomings of existing static mixers, and providing a more flexible, efficient and clean mixing solution, which is particularly suitable for the efficient management of water, fertilizer and pesticides in modern facility agriculture, not only improving the mixing effect, but also reducing the waste of fertilizers and pesticides, providing a new path for sustainable development for agricultural production.

[0040] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0041] like Figure 1-Figure 9 As shown, a bladeless inline mixer for plant protection includes a main mixing pipe 2, a first end of the main mixing pipe 2 is provided with a dilution carrier inlet 1a and a concentrate inlet 1b, a second end of the main mixing pipe 2 is provided with an outlet 5, and further includes:

[0042] A plurality of pipe wall bushings, each of which is arranged inside the main mixing pipe 2, and each of which is provided with a pneumatic contraction and expansion actuator, which enables each of the pipe wall bushings to switch between a contracted state and an expanded state;

[0043] An air pump 7 is connected to a solenoid valve 6, which is connected to a pneumatic pipeline. The pneumatic pipeline is connected to a plurality of the pipe wall bushings. The solenoid valve 6 is used to control the on / off and flow direction of the high-pressure gas in the pneumatic pipeline so that the pipe wall bushings can be switched between a contracted state and an expanded state.

[0044] A dilution carrier inlet 1a and a concentrate inlet 1b are arranged at the first end of the main mixing pipe 2, the dilution carrier inlet 1a is used to introduce water or other dilution media, and the concentrate inlet 1b is used to introduce concentrated liquid fertilizer or concentrated pesticide to be mixed. A plurality of pipe wall bushings are arranged inside the main mixing pipe 2, and an air pump 7 connected to the plurality of pipe wall bushings is arranged at the same time. The on-off and flow direction of the high-pressure gas in the air pressure pipeline leading to the plurality of pipe wall bushings are controlled by the solenoid valve 6, so that the pipe wall bushings can be switched between a contracted state and an expanded state. Since the movement of the pipe wall bushings can generate a large shear force and disturbance, the uniformity of liquid mixing can be ensured even when processing high-viscosity liquids, thereby greatly improving the use effect. The mixed liquid flows out through the outlet 5, and the outlet 5 is located at the lower end of the main mixing pipe 2, ensuring that the mixed liquid can be discharged smoothly, avoiding the cross-contamination problem caused by residues on the inner wall of the pipe.

[0045] It should be noted that the outlet 5 can be connected to the application device of the irrigation system, which can be a sprinkler nozzle, a drip irrigation pipe or other types of application equipment, and can be configured according to actual agricultural needs so that the mixed water, fertilizer and medicine can be evenly applied to the roots or leaves of crops, ensuring efficient use of nutrients and protective agents.

[0046] It should also be noted that a dilution carrier inlet 1a is provided at the upper portion of the main mixing pipe 2 for introducing a dilution liquid, such as purified water; the concentrate inlet 1b is located on the side wall of the main mixing pipe 2 and is connected to the pesticide or fertilizer storage tank via a section of chemically resistant PVC pipe.

[0047] like Figure 1-Figure 3 As shown, in some embodiments, the pneumatic pipeline includes a first pneumatic pipeline 3a and a second pneumatic pipeline 3b, and the tube wall sleeve includes a first tube wall sleeve 4a and a second tube wall sleeve 4b, the first tube wall sleeve 4a is connected to the first pneumatic pipeline 3a, and the second tube wall sleeve 4b is connected to the second pneumatic pipeline 3b. By arranging the first pneumatic pipeline 3a to be connected to the first tube wall sleeve 4a, and the second pneumatic pipeline 3b to be connected to the second tube wall sleeve 4b, gas can be provided to the first tube wall sleeve 4a and the second tube wall sleeve 4b at different times, thereby realizing the alternating expansion or contraction of the first tube wall sleeve 4a and the second tube wall sleeve 4b, which can produce significant inner wall movement, generate greater shear force and disturbance, and effectively promote the mixing of the liquid.

[0048] It should be noted that a first pneumatic contraction and expansion actuator is provided in the first tube wall bushing 4a, and a second pneumatic contraction and expansion actuator is provided in the second tube wall bushing 4b. The first pneumatic contraction and expansion actuator is used to drive the first tube wall bushing 4a to contract or expand, and the second pneumatic contraction and expansion actuator is used to drive the second tube wall bushing 4b to contract or expand.

[0049] like Figure 1-Figure 3 As shown, in some embodiments, the first tube wall liner 4a and the second tube wall liner 4b are arranged alternately. By staggering the first tube wall liner 4a and the second tube wall liner 4b in the main mixing pipe 2, when the first tube wall liner 4a and the second tube wall liner 4b can alternately expand or contract, a periodically changing and uniformly distributed inner cavity volume and fluid disturbance can be formed, which can better achieve the mixing effect of the liquid.

[0050] like Figure 1-Figure 3 As shown, in some embodiments, the solenoid valve 6 is connected to the first air pressure pipeline 3a and the second air pressure pipeline 3b, and the solenoid valve 6 is a pneumatic two-position three-way solenoid valve 6. The solenoid valve 6 periodically switches the air flow direction through a preset electrical control signal, and alternately provides air pressure to the first air pressure pipeline 3a and the second air pressure pipeline 3b. The pneumatic two-position three-way solenoid valve 6 is set to control the on-off and flow direction of the gas in the first air pressure pipeline 3a and the second air pressure pipeline 3b, so as to ensure that the first tube wall sleeve 4a and the second tube wall sleeve 4b can alternately expand or contract to form a periodically changing inner cavity volume and fluid disturbance; this disturbance can effectively promote the mixing of the liquid, so that the diluted carrier and the concentrated liquid are fully integrated in the main mixing pipeline 2, and the mixing effect is good. At the same time, the pressure of the two pairs of air pressure pipelines can accurately control the contraction and expansion state of the tube wall sleeve, thereby realizing the mixing requirements of liquids with different physical properties.

[0051] like Figure 4-Figure 5 As shown, in some embodiments, the first tube wall sleeve 4a is made of food-grade silicone; the second tube wall sleeve 4b is made of food-grade silicone. This material has excellent elasticity and durability and can adapt to frequent pneumatic contraction and expansion operations.

[0052] like Figure 1-Figure 3 and Figure 6-Figure 7 As shown, in some embodiments, the main mixing pipe 2 is a stainless steel pipe with an inner diameter of 160 mm and a wall thickness of 3 mm to 4 mm. The stainless steel material has excellent corrosion resistance and can resist the erosion of chemical substances in the agricultural environment. At the same time, the stainless steel material also has sufficient mechanical strength to withstand internal pneumatic pressure and external operating pressure.

[0053] In some embodiments, the plurality of pipe wall liners are evenly distributed inside the main mixing pipe 2. By evenly arranging the plurality of pipe wall liners inside the main mixing pipe 2, each liquid segment can be affected by the pipe wall liners, thereby ensuring a better mixing effect.

[0054] like Figure 1-Figure 5As shown, in some embodiments, 16 pipe wall bushings are provided, the main mixing pipe 2 is 1000mm long, the outer diameter of the pipe wall bushing is fixed to 160mm, the inner diameter of the pipe wall bushing is 120mm when it is in a contracted state, and the inner diameter of the pipe wall bushing is 60mm when it is in an expanded state. For concentrated pesticides or liquid fertilizers with high viscosity or difficult to mix, 16 pipe wall bushings are provided, and the pipe wall bushings show a smaller inner and outer diameter ratio in both the contracted and expanded states, which helps to enhance the disturbance effect of the liquid; this design is particularly suitable for concentrated pesticides or liquid fertilizers with high viscosity or difficult to mix, and effectively improves the mixing efficiency. The pipe wall bushings are evenly arranged on the inner surface of the pipe wall of the main mixing pipe 2, and the interval between each pipe wall bushing is 60mm to ensure that effective fluid disturbance is formed during the mixing process. The first pneumatic pipeline 3a and the second pneumatic pipeline 3b are respectively connected to the pneumatic input ends of the first pipe wall bushing 4a and the second pipe wall bushing 4b. The first pipe wall bushing 4a and the second pipe wall bushing 4b connected to the first air pressure pipeline 3a and the second air pressure pipeline 3b are arranged alternately in the pipe wall. The air pressure pipeline is connected to the air pump 7 through the pneumatic two-position three-way solenoid valve 6. The power of the air pump 7 is 40W, which can provide a maximum air pressure of 0.3MPa, which is sufficient for the contraction and expansion of the first pipe wall bushing 4a and the second pipe wall bushing 4b. In the actual operation process, the solenoid valve 6 periodically switches the air flow direction through a preset electric control signal, and alternately provides air pressure to the first air pressure pipeline 3a and the second air pressure pipeline 3b. In this way, the first pipe wall bushing 4a and the second pipe wall bushing 4b will produce alternating contraction and expansion actions in turn, forming a periodically changing inner cavity volume and fluid disturbance. This disturbance can effectively promote the mixing of liquids, so that the diluted carrier and the concentrated liquid are fully fused in the main mixing pipeline 2. The mixed water fertilizer or pesticide is discharged from the lower end outlet 5 of the main mixing pipeline 2. The outlet 5 is connected to the application device of the irrigation system, which can be a sprinkler nozzle, a drip irrigation pipe or other types of application equipment, and is configured according to actual agricultural needs. Through this design, the mixed water, fertilizer and medicine can be evenly applied to the roots or leaves of crops to ensure the efficient use of nutrients and protective agents. In addition, the mixer control system in this embodiment can be connected to the central control unit of the automated irrigation system to achieve intelligent management. Through sensor feedback data, such as soil moisture, ambient temperature, crop growth stage, etc., the control unit can automatically adjust the input amount and mixing ratio of the dilution carrier and the concentrated liquid to optimize irrigation and fertilization and drug application strategies. This intelligent operation not only improves the efficiency of agricultural production, but also reduces the waste of fertilizers and pesticides.

[0055] like Figure 6As shown, in some embodiments, the tube wall bushings are provided with 8, the main mixing pipe 2 is 900mm long, the outer diameter of the tube wall bushing is fixed to 160mm, the inner diameter of the tube wall bushing is 120mm when it is in a contracted state, and the inner diameter of the tube wall bushing is 60mm when it is in an expanded state. This embodiment is an online mixer containing 8 tube wall bushings, which is specially suitable for liquids that are easier to mix. This design reduces pressure loss and improves the operating efficiency of the equipment on the basis of reducing pneumatic actuators, while effectively reducing the manufacturing and operating costs of the equipment. In this embodiment, the main mixing pipe 2 is still made of stainless steel, which has excellent corrosion resistance and mechanical strength. The inner diameter of the pipe is 160mm, the wall thickness is 4mm, and the length is 900mm. Compared with the design of the above-mentioned 16 tube wall bushings, the length of the main mixing pipe 2 is slightly shortened to meet the needs of easier mixing of liquids, reduce the resistance of liquids passing through the pipe, and improve flow efficiency. A tube wall sleeve made of food-grade silicone is installed inside the pipeline, and 8 tube wall sleeves are evenly distributed on its inner surface. Pneumatic contraction and expansion actuators are arranged in the 8 tube wall sleeves. These actuators are also made of durable rubber materials, with an outer diameter of 160mm, an inner diameter of 120mm in the contracted state, and an inner diameter of 60mm in the expanded state. The interval between each actuator is 120mm. This larger interval setting can reduce the frequency of pneumatic operation and further reduce the air pressure demand. The first air pressure pipeline 3a and the second air pressure pipeline 3b are respectively connected to the pneumatic input end of each actuator, and the pneumatic actuators are arranged alternately in the pipeline. The air pressure pipeline is connected to a low-power air pump 7 through a pneumatic two-position three-way solenoid valve 6. The power of the air pump 7 is 30W, which can provide a maximum air pressure of 0.2MPa, which is sufficient to drive the contraction and expansion of these actuators. In the actual operation process, the solenoid valve 6 switches the airflow direction through a preset electric control signal, and alternately provides air pressure to the first air pressure pipeline 3a and the second air pressure pipeline 3b. The pneumatic contraction and expansion actuators produce alternating contraction and expansion actions in sequence, forming lower-frequency changes in the inner cavity volume and fluid disturbances. This lower disturbance intensity is sufficient to cope with liquids that are easier to mix, ensuring the uniformity of mixing while avoiding unnecessary energy consumption. The mixed liquid is discharged from the lower end outlet 5 of the main mixing pipe 2. Since the liquids are easier to mix, it is ensured that the mixed liquid can be smoothly discharged and enter the application device of the irrigation system. According to actual agricultural needs, the application device can be a sprinkler nozzle, a drip irrigation pipe or other types of application equipment. This embodiment significantly reduces the manufacturing and operating costs of the equipment by reducing the number of pneumatic actuators and reducing the power requirements of the air pressure system. It is particularly suitable for scenarios that require processing low-viscosity, easy-to-mix liquids, such as diluted liquid fertilizers or pesticide solutions. This design not only improves the economy and operating efficiency of the equipment, but also ensures the simplicity and reliability of operation, providing a more economical and effective online mixing solution for water, fertilizer and medicine for agricultural production.

[0056] like Figure 7-Figure 9As shown, in some embodiments, the tube wall bushing is provided with 4, the main mixing pipe 2 is 800mm long, the outer diameter of the tube wall bushing is fixed to 160mm, the inner diameter of the tube wall bushing is 138mm when it is in a contracted state, and the inner diameter of the tube wall bushing is 94mm when it is in an expanded state. This embodiment is an online mixer containing 4 tube wall bushings, which is particularly suitable for liquids that are easily mixed. By further reducing the number of tube wall bushings, this embodiment can effectively reduce pressure loss, improve the operating efficiency of the equipment, and significantly reduce the manufacturing and operating costs of the equipment. In this embodiment, the main mixing pipe 2 adopts a stainless steel pipe with an inner diameter of 160mm, a wall thickness of 3mm, and a length of 800mm. The stainless steel material is 304 stainless steel, which has good corrosion resistance and mechanical strength, and is suitable for long-term contact with chemicals in an agricultural environment. Since this embodiment is designed for liquids that are easily mixed, the length and wall thickness of the pipe are reduced compared to other embodiments, further reducing the flow resistance and pressure loss of the liquid in the pipe. A layer of tube wall sleeve made of food-grade silicone is installed on the inner surface of the pipe. The smooth surface of the tube wall sleeve helps to reduce fluid friction and ensure smooth flow of miscible liquids. Four pneumatic contraction and expansion actuators are evenly arranged inside the tube wall sleeve. These actuators are made of durable rubber materials and are designed to shrink and expand rapidly under the action of air pressure. The outer diameter of each actuator is 160mm. When in the contracted state, the inner diameter is 138mm, and the inner-outer diameter ratio is 0.863; when in the expanded state, the inner diameter is 94mm, and the inner-outer diameter ratio is 0.689. Under the above parameter settings, the pneumatic contraction and expansion actuator exhibits a large inner-outer diameter ratio in both the contraction and expansion states, which helps to reduce the disturbance effect of the liquid and reduce pressure loss. It is suitable for highly miscible liquids. The interval between the actuators is set to 240mm. This large spacing design makes the pneumatic operation frequency lower and can effectively reduce air pressure consumption. The first air pressure pipeline 3a and the second air pressure pipeline 3b are respectively connected to the pneumatic input end of each actuator, and the actuators are arranged alternately in the pipeline. The air pressure pipeline is connected to a low-power air pump 7 through a pneumatic two-position three-way solenoid valve 6. The power of the air pump 7 is 20W, which can provide a maximum air pressure of 0.15MPa, which is sufficient to drive the four actuators to effectively contract and expand. In actual operation, the solenoid valve 6 switches the air flow direction through a preset control signal, and alternately provides air pressure to the first air pressure pipeline 3a and the second air pressure pipeline 3b. The pneumatic contraction and expansion actuator produces alternating contraction and expansion actions, forming a lower frequency of inner cavity volume changes and slight fluid disturbances. This disturbance is sufficient to deal with highly miscible liquids, such as highly diluted liquid fertilizers or pesticide solutions, to ensure that the liquids can be fully blended in the main mixing pipeline 2. The mixed liquid is discharged through the lower end outlet 5 of the main mixing pipeline 2. The application device can be a sprinkler nozzle, a drip irrigation pipeline or other types of equipment, configured according to the specific needs of agriculture.This embodiment significantly reduces the manufacturing and operating costs of the equipment by reducing the number of pneumatic actuators to 4, using a low-power air pump 7 and a simplified pneumatic system. It is particularly suitable for processing liquids that are easily mixed, such as highly diluted fertilizer or pesticide solutions. This design not only optimizes energy use and improves equipment operating efficiency, but also ensures the economy and reliability of operation, providing a simpler and more economical online mixing solution for water, fertilizer and pesticide for small-scale agricultural production or irrigation systems that require fine control.

[0057] In summary, this application has at least the following effects:

[0058] 1. Efficient and uniform mixing effect: Traditional static in-line mixers mainly rely on fixed blades to achieve liquid mixing, and their effect is heavily dependent on the flow rate and viscosity of the liquid. For a specific model of traditional static mixer, it can only mix liquid fertilizers or pesticides within a certain viscosity range, and its applicability is poor. When faced with liquid fertilizers and pesticides with large viscosity differences, traditional mixers are prone to uneven mixing. The present invention adopts a bladeless tube wall sleeve design, and achieves sufficient mixing of the liquid through the controllable contraction and expansion of the tube wall sleeve. Since the movement of the tube wall sleeve can generate large shear force and disturbance, even when dealing with high-viscosity liquids, the uniformity of liquid mixing can be guaranteed, thereby greatly improving the use effect.

[0059] 2. Effectively avoid cross contamination: The fixed blades of existing static mixers are prone to residual fertilizers or pesticides after mixing, which are difficult to clean thoroughly, resulting in cross contamination problems in subsequent mixing operations. The present invention eliminates the traditional blade design by using a smooth tube wall bushing structure. The tube wall bushing can self-clean during the contraction and expansion process, effectively remove residual liquid fertilizer or pesticides, ensure the purity of subsequent operations, and avoid the problem of reduced chemical efficacy of the mixed liquid due to residual substances. This design greatly reduces the frequency and difficulty of equipment cleaning and reduces maintenance costs.

[0060] 3. Flexibility to adapt to a variety of liquids: Due to the wide variety of liquid fertilizers and pesticides used in agricultural production, and the large differences in their physical properties (such as viscosity, density, surface tension, etc.), traditional static mixers cannot effectively adjust for liquids with different characteristics. The mixer of the present invention can flexibly respond to the mixing needs of liquids with different viscosities and concentrations by adjusting the parameters of the pneumatic system (such as the contraction frequency and expansion amplitude of the pipe wall bushing), and is suitable for online mixing of various types of water, fertilizers and medicines. This flexibility makes the present invention more applicable in facility agriculture and can meet the diverse needs of different crops and different growth stages for water, fertilizers and medicines.

[0061] 4. Reduce the risk of chemical reactions and physical blockages: In traditional mixers, different types of liquid fertilizers and pesticides may undergo adverse chemical reactions, such as the generation of precipitation or harmful substances, which not only reduces the activity of the active ingredients, but also may cause equipment blockage. The present invention reduces the residence time of the liquid in the mixer and the probability of adverse chemical reactions through the innovative bladeless design and the movement of the pipe wall bushing. At the same time, since the surface of the pipe wall bushing is smooth and has no fixed structure, it is not easy to accumulate sediment and particulate matter, which further reduces the risk of physical blockage and ensures the long-term stable operation of the equipment.

[0062] 5. Reduce operating costs and improve production efficiency: Traditional static mixers require frequent cleaning and maintenance in agricultural applications to prevent the accumulation of residues and equipment clogging, which increases operating costs and downtime. The bladeless tube wall liner online mixer of the present invention significantly reduces the operating costs of the equipment by reducing the need for cleaning and maintenance. In addition, since the equipment can quickly and efficiently complete the online mixing of water, fertilizer and medicine, it reduces the operating steps, improves the efficiency of agricultural production, and provides farmers with a more economical solution.

[0063] In summary, the present invention overcomes many shortcomings of the prior art through an innovative bladeless pipe wall sleeve design, achieves multiple advantages such as efficient and uniform mixing, avoidance of cross contamination, adaptability to a variety of liquids, reduction of reaction risks and operating costs, and provides a more efficient, flexible and economical online mixing solution for water, fertilizer and medicine for facility agriculture. These advantages make the present invention have broad application prospects and market potential in the agricultural field.

[0064] The same or similar parts between the various embodiments in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiment described later, since it corresponds to the system, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0065] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A bladeless inline mixer for crop protection, comprising a main mixing pipe, wherein a first end of the main mixing pipe is provided with a dilution carrier inlet and a concentrate inlet, and a second end of the main mixing pipe is provided with an outlet, characterized in that: Also includes: A plurality of pipe wall liners, each of which is disposed inside the main mixing pipe, and each of which can be switched between a contracted state and an expanded state; An air pump is connected to a solenoid valve, which is connected to a pneumatic pipeline. The pneumatic pipeline is connected to multiple pipe wall sleeves, and the solenoid valve is used to control the on-off and flow direction of the high-pressure gas in the pneumatic pipeline so that the pipe wall sleeve can be switched between a contracted state and an expanded state.

2. The plant protection bladeless inline mixer according to claim 1, characterized in that: The pneumatic pipeline includes a first pneumatic pipeline and a second pneumatic pipeline, and the pipe wall bushing includes a first pipe wall bushing and a second pipe wall bushing, the first pipe wall bushing is connected to the first pneumatic pipeline, and the second pipe wall bushing is connected to the second pneumatic pipeline.

3. The plant protection bladeless inline mixer according to claim 2, characterized in that: The first tube wall bushings and the second tube wall bushings are arranged alternately.

4. The plant protection bladeless inline mixer according to claim 2, characterized in that: The solenoid valve is connected to the first air pressure pipeline and the second air pressure pipeline. The solenoid valve is a pneumatic two-position three-way solenoid valve. The solenoid valve periodically switches the air flow direction through a preset electrical control signal to alternately provide air pressure to the first air pressure pipeline and the second air pressure pipeline.

5. The plant protection bladeless inline mixer according to claim 2, characterized in that: The first pipe wall bushing is made of food-grade silicone; And / or, the second tube wall bushing is made of food-grade silicone.

6. The plant protection bladeless inline mixer according to any one of claims 1 to 5, characterized in that: The main mixing pipe is a stainless steel pipe with an inner diameter of 160 mm and a wall thickness of 3 mm to 4 mm.

7. The plant protection bladeless inline mixer according to claim 6, characterized in that: A plurality of pipe wall liners are evenly distributed inside the main mixing pipe.

8. The plant protection bladeless inline mixer according to claim 7, characterized in that: There are 16 pipe wall bushings, the length of the main mixing pipe is 1000 mm, the outer diameter of the pipe wall bushing is fixed at 160 mm, the inner diameter of the pipe wall bushing is 120 mm when it is in a contracted state, and the inner diameter of the pipe wall bushing is 60 mm when it is in an expanded state.

9. The plant protection bladeless inline mixer according to claim 7, characterized in that: There are 8 pipe wall bushings, the length of the main mixing pipe is 900 mm, the outer diameter of the pipe wall bushing is fixed at 160 mm, the inner diameter of the pipe wall bushing is 120 mm when it is in a contracted state, and the inner diameter of the pipe wall bushing is 60 mm when it is in an expanded state.

10. The plant protection bladeless inline mixer according to claim 7, characterized in that: There are four pipe wall bushings, the length of the main mixing pipe is 800 mm, the outer diameter of the pipe wall bushing is fixed at 160 mm, the inner diameter of the pipe wall bushing is 138 mm when it is in a contracted state, and the inner diameter of the pipe wall bushing is 94 mm when it is in an expanded state.

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