A plant protection bladeless inline mixer

Abstract

The embodiment of the specification provides a plant protection bladeless online mixer, which comprises a main mixing pipeline, a dilution carrier inlet and a concentrated liquid inlet are arranged at a first end of the main mixing pipeline, an outlet is arranged at a second end of the main mixing pipeline, and the plant protection bladeless online mixer further comprises: a plurality of pipe wall bushings, which are arranged inside the main mixing pipeline; an air pump, an electromagnetic valve is connected to the air pump, the electromagnetic valve is connected with an air pressure pipeline, the air pressure pipeline is connected with the plurality of pipe wall bushings, and the electromagnetic valve is used for controlling the on-off and flow direction of high-pressure gas in the air pressure pipeline, so that the pipe wall bushings are converted between a contraction state and an expansion state. The on-off and flow direction of the high-pressure gas in the air pressure pipeline to the plurality of pipe wall bushings are controlled by the electromagnetic valve, so that the pipe wall bushings are converted between the contraction state and the expansion state. The movement of the pipe wall bushings can generate greater shear force and disturbance, and the uniformity of liquid mixing can be ensured even when high-viscosity liquid is processed, so that the use effect is greatly improved.

Description

TECHNICAL FIELD

[0001] The present specification relates to the technical field of smart agriculture, in particular to a plant protection bladeless online mixer. BACKGROUND

[0002] The water and fertilizer online mixing devices currently mainly used in the market are usually borrowed from the static online mixers in the chemical industry. However, the traditional static mixers have significant limitations in agricultural applications and cannot meet the diversified needs of modern agricultural production. First, the liquid fertilizers and pesticides used in agricultural production are of various types and have large differences in physical properties (such as viscosity, density, fluidity, etc.). The traditional static online mixers rely on the tangential mixing principle of fixed blades and fluid, and it is difficult to achieve uniform mixing of different types of liquid using a specific type of static mixer for liquid with significant differences in viscosity. The lack of flexibility in device design makes it difficult to meet the mixing needs of high-viscosity liquid fertilizers and low-viscosity pesticides, often leading to uneven mixing and affecting the application effect. In addition, different types of pesticides and fertilizers may react when mixed, generating precipitates or other undesirable reaction products, thereby reducing the activity of the active ingredients, causing waste of fertilizers and pesticides, and even causing pesticide damage to crops. Second, the fixed blade design of the traditional static mixer is prone to leaving a large amount of fertilizer and pesticide after mixing, and these residues are not only difficult to remove but also may react with newly added liquid in subsequent mixing processes, further reducing the effectiveness of the new round of application. This residue problem increases the difficulty of cleaning and maintaining the device, leading to low utilization efficiency of the device, and increases the operating cost and resource waste. SUMMARY

[0003] Therefore, the present specification provides a plant protection bladeless online mixer, which sets multiple pipe wall bushings inside the main mixing pipeline and sets an air pump connected to the multiple pipe wall bushings, controls the on-off and flow direction of high-pressure gas in the air pressure pipeline to the multiple pipe wall bushings through the electromagnetic valve, and converts the pipe wall bushings between the contracted state and the expanded state. Since the movement of the pipe wall bushing can generate a large shear force and disturbance, the uniformity of liquid mixing can be ensured even when high-viscosity liquid is processed, thereby greatly improving the use effect.

[0004] The present specification provides the following technical solutions: a plant protection bladeless online mixer, comprising a main mixing pipeline, a dilution carrier inlet and a concentrated liquid inlet are arranged at a first end of the main mixing pipeline, an outlet is arranged at a second end of the main mixing pipeline, and the plant protection bladeless online mixer further comprises:

[0005] A plurality of pipe wall bushings are arranged inside the main mixing pipeline, and the plurality of pipe wall bushings can be converted between a contracted state and an expanded state.

[0006] A gas pump is connected with a solenoid valve, the solenoid valve is connected with a gas pressure pipeline, the gas pressure pipeline is connected with a plurality of pipe wall bushings, and the solenoid valve is used for controlling the on-off and flow direction of high-pressure gas in the gas pressure pipeline, so that the pipe wall bushings are switched between the contracted state and the expanded state.

[0007] Preferably, the gas pressure pipeline comprises a first gas pressure pipeline and a second gas pressure pipeline, and the pipe wall bushings comprise a first pipe wall bushing and a second pipe wall bushing, the first pipe wall bushing is connected with the first gas pressure pipeline, and the second pipe wall bushing is connected with the second gas pressure pipeline.

[0008] Preferably, the first pipe wall bushing and the second pipe wall bushing are staggered.

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

[0010] Preferably, the first pipe wall bushing is made of food-grade silica gel.

[0011] Preferably, the second pipe wall bushing is made of food-grade silica gel.

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

[0013] Preferably, a plurality of pipe wall bushings are uniformly distributed inside the main mixing pipeline.

[0014] Preferably, the pipe wall bushing is provided with 16 pipe wall bushings, the main mixing pipeline has a length of 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 the pipe wall bushing is in the contracted state, and the inner diameter of the pipe wall bushing is 60 mm when the pipe wall bushing is in the expanded state.

[0015] Preferably, the pipe wall bushing is provided with 8 pipe wall bushings, the main mixing pipeline has a length of 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 the pipe wall bushing is in the contracted state, and the inner diameter of the pipe wall bushing is 60 mm when the pipe wall bushing is in the expanded state.

[0016] Preferably, the pipe wall bushing is provided with 4 pipe wall bushings, the main mixing pipeline has a length of 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 the pipe wall bushing is in the contracted state, and the inner diameter of the pipe wall bushing is 94 mm when the pipe wall bushing is in the expanded state.

[0017] Compared with the prior art, the at least one technical scheme adopted by the embodiment of the present specification can achieve the beneficial effects at least including:

[0018] By arranging a plurality of pipe wall bushings inside the main mixing pipeline and arranging an air pump in communication with the plurality of pipe wall bushings, the opening and closing of the high-pressure gas in the air pressure pipeline to the plurality of pipe wall bushings and the flow direction are controlled by the electromagnetic valve, so that the pipe wall bushings are switched between the contracted state and the 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 high-viscosity liquid is processed, thereby greatly improving the use effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 is a structural schematic view of the online mixer without blades for plant protection provided by the present application;

[0021] Figure 2 is a sectional view of the online mixer without blades for plant protection provided by the present application;

[0022] Figure 3 is a partial sectional view of the online mixer without blades for plant protection provided by the present application;

[0023] Figure 4 is a structural schematic view of the pipe wall bushing in the contracted state of the online mixer without blades for plant protection provided by the present application;

[0024] Figure 5 is a structural schematic view of the pipe wall bushing in the expanded state of the online mixer without blades for plant protection provided by the present application;

[0025] Figure 6 is a structural schematic view of eight pipe wall bushings of the online mixer without blades for plant protection provided by the present application;

[0026] Figure 7 is a structural schematic view of four pipe wall bushings of the online mixer without blades for plant protection provided by the present application;

[0027] Figure 8 is a structural schematic view of the pipe wall bushing in the contracted state with a smaller inner-outer diameter ratio of the online mixer without blades for plant protection provided by the present application;

[0028] Figure 9is a structural schematic diagram of a pipe wall bushing in an expanded state with a small inner-outer diameter ratio of the plant protection bladeless online mixer provided in the present application.

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

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

[0031] The embodiments of the present application will be described in detail below with reference to the drawings.

[0032] It is to be understood that the following description is merely illustrative of the principles of the application, and that numerous and various embodiments of the present application can be made without departing from the spirit of the application. It is to be understood that the aspects described herein can be implemented independently of one another. The various aspects and embodiments described herein can be combined in various ways. It is also 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 to be understood that where the description uses numerals to describe various features, such numerals are used merely as labels to more particularly illustrate the features.

[0033] It is also to be understood that the following description is merely illustrative of the principles of the application, and that numerous and various embodiments of the present application can be made without departing from the spirit of the application. It is to be understood that the following description is merely illustrative of the principles of the application, and that numerous and various embodiments of the present application can be made without departing from the spirit of the application. It is to be understood that the following description is merely illustrative of the principles of the application, and that numerous and various embodiments of the present application can be made without departing from the spirit of the application.

[0034] In addition, in the following description, specific details are provided to thoroughly understand the examples. However, one of ordinary skill in the art will understand that the described aspects can be practiced without these specific details.

[0035] In modern agricultural production, the scientific management and efficient use of water, fertilizer and pesticide become more and more important. Especially in the facility agriculture, the online mixing technology of water, fertilizer and pesticide is gradually attracting attention. The goal of this technology is to improve the yield and quality of crops by optimizing the use of water, fertilizer and pesticide, while reducing resource waste and environmental pollution. However, the static online mixers 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 equipment shows obvious limitations when dealing with fertilizers and pesticides with different concentrations, viscosities and physical properties in agricultural production.

[0036] In the prior art, static inline mixers are widely used in chemical and other industries, which 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 since it has no moving parts, the maintenance requirement is low, so it has been widely used in chemical production, especially suitable 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 industry. Liquid fertilizers and pesticides often have significantly different physical properties. For example, concentrated liquid fertilizers usually have high viscosity and are rich in organic matter and minerals, with a certain degree of granularity; while concentrated pesticides can 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 mixing, causing chemical instability. For example, calcium and magnesium ions in some liquid fertilizers may react with phosphate compounds in pesticides to form water-insoluble precipitates, which not only reduce the activity of the active ingredients, but also may clog the mixer and application equipment. Due to the above reasons, the application of traditional static inline mixers in the agricultural field faces many challenges. First, a specific model of traditional mixer is difficult to effectively handle the mixing of different high-viscosity liquids and low-viscosity liquids, resulting in uneven mixing and failing to ensure the uniformity and effectiveness of application. This unevenness may cause some areas of crops to not receive enough fertilizer or pesticide, while other areas may be over-applied, leading to resource waste and potential environmental pollution problems. Second, since liquid fertilizers and pesticides may have adverse chemical reactions in the mixer, in addition, the fixed blades of the static mixer inevitably have residues of fertilizers or pesticides during use. These residues are difficult to clean due to the small grooves on the surface of the blades and the narrow space between the blades, especially when dealing with high-viscosity or particle-containing liquids. These residues not only may cause cross-contamination in subsequent mixing operations, affecting the purity of the new batch of mixtures, but also may react with newly added liquids, further reducing the effectiveness of the mixture. Due to these problems, the application of static inline mixers in the agricultural field has been greatly limited.

[0037] Therefore, the limitations of the prior art indicate that there is an urgent need for a new type of device in agricultural facilities that can flexibly meet the mixing needs of different physical properties of liquids, especially in achieving online mixing of water, fertilizer, and pesticide while avoiding cross-contamination and chemical reactions, ensuring efficient and precise pesticide and fertilizer application. In order to address these challenges, the market and researchers urgently need a new type of inline mixing device that can efficiently mix water, fertilizer, and pesticide of various viscosities and concentrations, and avoid cross-contamination.

[0038] The inventor designs a kind of plant protection bladeless online mixer after extensive and in-depth experiment.

[0039] More specifically, the solution adopted by the present application includes: by innovative structural design, it solves the problem that the traditional static mixer cannot overcome. The mixer realizes the mixing of liquid by the contraction and expansion of the pipe wall liner, avoids the use of traditional blades, and fundamentally eliminates the pollution problem caused by blade residues. The frequency and amplitude of the pipe wall liner 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, the pipe wall liner can effectively remove any residues on its surface during contraction and expansion, ensuring the purity of subsequent mixing operations. It overcomes many shortcomings of existing static mixers in technology, provides a more flexible, efficient and clean mixing solution, and is especially suitable for efficient management of water, fertilizer and pesticide in modern facility agriculture. Not only improves the mixing effect, but also reduces the waste of chemical fertilizers and pesticides, provides a new path for sustainable development of agricultural production.

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

[0041] As shown in Figures 1-9 A kind of plant protection bladeless online mixer, including main mixing pipeline 2, the first end of the main mixing pipeline 2 is provided with dilution carrier inlet 1a and concentrated liquid inlet 1b, the second end of the main mixing pipeline 2 is provided with outlet 5, still including:

[0042] A plurality of pipe wall liners, a plurality of the pipe wall liners are all arranged in the main mixing pipeline 2, and a plurality of are all provided with pneumatic contraction and expansion execution elements, the pneumatic contraction and expansion execution elements make the pipe wall liner can be converted between contraction state and expansion state;

[0043] Air pump 7, the air pump 7 is connected with electromagnetic valve 6, the electromagnetic valve 6 is connected with gas pressure pipeline, the gas pressure pipeline is connected with a plurality of the pipe wall liners, and the electromagnetic valve 6 is used to control the on-off and flow direction of high-pressure gas in the gas pressure pipeline, to make the pipe wall liner be converted between contraction state and expansion state.

[0044] By setting the dilution carrier inlet 1a and the concentrated liquid inlet 1b at the first end of the main mixing pipeline 2, the dilution carrier inlet 1a is used to introduce water or other dilution media, and the concentrated liquid inlet 1b is used to introduce the concentrated liquid fertilizer or concentrated pesticide to be mixed. By setting multiple pipe wall liners inside the main mixing pipeline 2, and simultaneously setting an air pump 7 connected to the multiple pipe wall liners, the on-off and flow direction of high-pressure gas in the air pressure pipeline to the multiple pipe wall liners are controlled by the electromagnetic valve 6, so that the pipe wall liners can be converted between the contracted state and the expanded state. Due to the movement of the pipe wall liners, a large shear force and disturbance can be generated, which can ensure the uniformity of liquid mixing even when handling high-viscosity liquids, thereby greatly improving the use effect. The mixed liquid flows out through the outlet 5 located at the lower end of the main mixing pipeline 2, ensuring that the mixed liquid can be smoothly discharged, and avoiding cross-contamination problems caused by residual pipe wall.

[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, a drip irrigation pipeline, or other types of application equipment. According to the actual agricultural needs, the mixed water, fertilizer, and pesticide can be uniformly applied to the roots or leaves of crops, ensuring efficient use of nutrients and protection agents.

[0046] It should also be noted that the dilution carrier inlet 1a is set at the upper part of the main mixing pipeline 2 for introducing dilution liquid such as purified water, and the concentrated liquid inlet 1b is located on the side wall of the main mixing pipeline 2 and connected to the pesticide or fertilizer storage tank through a section of chemical corrosion-resistant PVC pipeline.

[0047] As shown in Figures 1-3 In some embodiments, the air pressure pipeline includes a first air pressure pipeline 3a and a second air pressure pipeline 3b, and the pipe wall liner includes a first pipe wall liner 4a and a second pipe wall liner 4b. The first pipe wall liner 4a is connected to the first air pressure pipeline 3a, and the second pipe wall liner 4b is connected to the second air pressure pipeline 3b. By setting the first air pressure pipeline 3a connected to the first pipe wall liner 4a and the second air pressure pipeline 3b connected to the second pipe wall liner 4b, gas can be provided to the first pipe wall liner 4a and the second pipe wall liner 4b at different times, thereby realizing the alternating expansion or contraction of the first pipe wall liner 4a and the second pipe wall liner 4b, generating significant inner wall movement, and generating a large shear force and disturbance to effectively promote liquid mixing.

[0048] It should be noted that the first pipe wall liner 4a is provided with a first pneumatic contraction and expansion actuator, and the second pipe wall liner 4b is provided with a second pneumatic contraction and expansion actuator. The first pneumatic contraction and expansion actuator drives the first pipe wall liner 4a to contract or expand, and the second pneumatic contraction and expansion actuator drives the second pipe wall liner 4b to contract or expand.

[0049] As shown in Figures 1-3 some embodiments, the first tube wall liner 4a and the second tube wall liner 4b are staggered, and when the first tube wall liner 4a and the second tube wall liner 4b can expand or contract alternately, the periodic change and uniform distribution of the internal cavity volume and fluid disturbance can be formed by staggering the first tube wall liner 4a and the second tube wall liner 4b in the main mixing pipeline 2, so that the mixing effect of the liquid can be better achieved.

[0050] As shown in Figures 1-3 some embodiments, the electromagnetic valve 6 is connected to the first gas pressure pipeline 3a and the second gas pressure pipeline 3b, the electromagnetic valve 6 is a pneumatic two-position three-way electromagnetic valve 6, and the electromagnetic valve 6 periodically switches the gas flow direction through a pre-set electric control signal to alternately provide gas pressure to the first gas pressure pipeline 3a and the second gas pressure pipeline 3b. By setting the pneumatic two-position three-way electromagnetic valve 6 to control the on-off and flow direction of the gas in the first gas pressure pipeline 3a and the second gas pressure pipeline 3b, the first tube wall liner 4a and the second tube wall liner 4b can expand or contract alternately, and the periodic change of the internal cavity volume and fluid disturbance can be formed. Such disturbance can effectively promote the mixing of the liquid, so that the dilution carrier and the concentrated liquid can be fully mixed in the main mixing pipeline 2, and the mixing effect is good. At the same time, the pressure of the two pairs of gas pressure pipelines can accurately control the contraction and expansion state of the tube wall liner, so as to meet the mixing requirements of liquids with different physical properties.

[0051] As shown in Figures 4-5 some embodiments, the first tube wall liner 4a is made of food-grade silica gel, and the second tube wall liner 4b is also made of food-grade silica gel. Such material has excellent elasticity and durability, and can adapt to frequent pneumatic contraction and expansion operations.

[0052] As shown in Figures 1-3 and Figures 6-7 some embodiments, the main mixing pipeline 2 is a stainless steel pipeline 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 and can withstand the internal pneumatic pressure and external operating pressure.

[0053] In some embodiments, a plurality of tube wall liners are uniformly distributed inside the main mixing pipeline 2. By uniformly arranging a plurality of tube wall liners inside the main mixing pipeline 2, each liquid segment can be affected by the tube wall liner, and the mixing effect can be guaranteed to be good.

[0054] As shown in Figures 1-5As shown, in some embodiments, the pipe wall liner is provided with 16, the main mixing pipe 2 length is 1000mm, the pipe wall liner outer diameter is fixed at 160mm, the pipe wall liner inner diameter is 120mm when in the contracted state, and the pipe wall liner inner diameter is 60mm when in the expanded state. For high viscosity or difficult to mix concentrated pesticides or liquid fertilizers, 16 pipe wall liners are provided, and the pipe wall liners exhibit a small 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 high viscosity or difficult to mix concentrated pesticides or liquid fertilizers, effectively improving the mixing efficiency. The pipe wall liners are evenly arranged on the inner surface of the main mixing pipe 2, and the spacing between each pipe wall liner is 60mm to ensure effective fluid disturbance during mixing. The first air pressure pipeline 3a and the second air pressure pipeline 3b are respectively connected to the pneumatic input end of the first pipe wall liner 4a and the second pipe wall liner 4b. The first pipe wall liner 4a and the second pipe wall liner 4b connected by the first air pressure pipeline 3a and the second air pressure pipeline 3b are alternately arranged in the pipe wall. The air pressure pipeline is connected to the air pump 7 through the pneumatic two-position three-way electromagnetic valve 6, the power of the air pump 7 is 40W, and it can provide a maximum air pressure of 0.3MPa, which is sufficient for the contraction and expansion of the first pipe wall liner 4a and the second pipe wall liner 4b. In actual operation, the electromagnetic valve 6 periodically switches the air flow direction through a pre-set 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 liner 4a and the second pipe wall liner 4b will sequentially produce alternating contraction and expansion actions, forming a periodically changing inner cavity volume and fluid disturbance. This disturbance can effectively promote the mixing of the liquid, so that the dilution carrier and the concentrated liquid are fully integrated in the main mixing pipe 2. The mixed water, fertilizer or pesticide is discharged from the lower end outlet 5 of the main mixing pipe 2. The outlet 5 is connected to the application device of the irrigation system, which can be a sprinkler, a drip irrigation pipeline or other types of application equipment, and is configured according to the actual agricultural needs. Through this design, the mixed water, fertilizer or pesticide can be uniformly applied to the roots or leaves of crops, ensuring efficient use of nutrients and protection agents. In addition, the mixer control system in this embodiment can be connected to the central control unit of the automatic irrigation system to realize intelligent management. Through sensor feedback data such as soil moisture, environmental 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, optimizing the irrigation and fertilization and pesticide application strategy. This intelligent operation not only improves the efficiency of agricultural production, but also reduces the waste of chemical fertilizers and pesticides.

[0055] As Figure 6As shown, in some embodiments, the tube wall liner is provided with 8, the main mixing pipe 2 length is 900 mm, the tube wall liner outer diameter is fixed at 160 mm, the tube wall liner inner diameter is 120 mm when in the contracted state, and the tube wall liner inner diameter is 60 mm when in the expanded state. This embodiment is an online mixer containing 8 tube wall liners, which is specially suitable for liquids that are easy to mix. This design reduces the number of pneumatic actuators, reduces pressure loss, improves the operating efficiency of the equipment, and effectively reduces 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 160 mm, the wall thickness is 4 mm, and the length is 900 mm. Compared with the design of 16 tube wall liners described above, the length of the main mixing pipe 2 is slightly shortened to meet the needs of liquids that are easy to mix, reduce the resistance of the liquid passing through the pipe, and improve the flow efficiency. The tube wall liner made of food-grade silicone is installed inside the pipe, and the inner surface is uniformly distributed with 8 tube wall liners. Each of the 8 tube wall liners is provided with a pneumatic contraction and expansion actuator, which is also made of durable rubber material, with an outer diameter of 160 mm, an inner diameter of 120 mm in the contracted state, and an inner diameter of 60 mm in the expanded state. The spacing between each actuator is 120 mm, which can reduce the frequency of pneumatic operation and further reduce the air pressure requirement. The first air pressure pipeline 3a and the second air pressure pipeline 3b are connected to the pneumatic input end of each actuator, and the pneumatic actuators are arranged alternately in the pipe. The air pressure pipeline is connected to a low-power air pump 7 through a pneumatic two-position three-way electromagnetic valve 6, the power of the air pump 7 is 30 W, which can provide a maximum air pressure of 0.2 MPa, which is sufficient to drive the contraction and expansion of the actuators. In actual operation, the electromagnetic valve 6 switches the air flow direction through the pre-set electric control signal to alternately provide 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 internal cavity volume and fluid disturbance. This lower disturbance intensity is sufficient to handle liquids that are easy to mix, ensuring 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 liquid is easy to mix, it is ensured that the mixed liquid can be smoothly discharged and enter the application device of the irrigation system. According to the actual agricultural needs, the application device can be a sprinkler, 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 the power requirement of the air pressure system, and is particularly suitable for scenarios that require handling liquids with low viscosity and easy mixing, such as diluted liquid fertilizer or pesticide solution. This design not only improves the economy and operating efficiency of the equipment, but also ensures the simplicity and reliability of the operation, providing a more economical and effective online mixing solution for water, fertilizer, and pesticide.

[0056] As Figures 7-9As shown, in some embodiments, the pipe wall liner is provided with 4, the main mixing pipe 2 length is 800 mm, the pipe wall liner outer diameter is fixed at 160 mm, the pipe wall liner in the state of contraction inner diameter is 138 mm, the pipe wall liner in the state of expansion, inner diameter is 94 mm. The implementation is a kind of on-line mixer containing 4 pipe wall liners, especially suitable for extremely easy mixing liquid. By further reducing the number of pipe wall liners, the embodiment can effectively reduce the pressure loss, improve the operating efficiency of the equipment, and significantly reduce the manufacturing and operating cost of the equipment. In this embodiment, the main mixing pipe 2 adopts a stainless steel pipe with an inner diameter of 160 mm, a wall thickness of 3 mm and a length of 800 mm, the stainless steel material is selected from 304 stainless steel, which has good corrosion resistance and mechanical strength, and is suitable for long-term contact with chemicals in agricultural environment. Since the embodiment is designed for extremely easy mixing liquid, 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. The inner surface of the pipe is provided with a layer of food-grade silicone pipe wall liner, and the smooth surface of the pipe wall liner helps to reduce fluid friction and ensure smooth flow of the miscible liquid. Four pneumatic contraction and expansion actuators are uniformly arranged inside the pipe wall liner. These actuators are made of durable rubber material and are designed to quickly contract and expand under air pressure. The outer diameter of each actuator is 160 mm, the inner diameter is 138 mm in the state of contraction, and the inner diameter ratio at this time is 0.863; while in the state of expansion, the inner diameter is 94 mm, and the inner diameter ratio is 0.689. Under the above parameter settings, the pneumatic contraction and expansion actuators exhibit a large inner diameter ratio in the contraction and expansion states, which helps to reduce the disturbance effect of the liquid, reduce the pressure loss, and is suitable for extremely easy mixing liquid. The spacing between the actuators is set to 240 mm, which is a relatively large spacing design that allows for lower air pressure operating frequency, effectively reducing 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 alternately arranged in the pipe. The air pressure pipeline is connected to a low-power air pump 7 through a pneumatic two-position three-way electromagnetic valve 6. The power of the air pump 7 is 20 W, which can provide a maximum air pressure of 0.15 MPa, sufficient to drive the four actuators to effectively contract and expand. In actual operation, the electromagnetic valve 6 switches the air flow direction through the pre-set control signal, alternately providing 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, forming a low-frequency internal cavity volume change and slight fluid disturbance. This disturbance is sufficient to deal with extremely easy mixing liquids, such as highly diluted liquid fertilizers or pesticide solutions, to ensure that the liquid can be fully mixed in the main mixing pipe 2. The mixed liquid is discharged through the lower end outlet 5 of the main mixing pipe 2. The application device can be a sprinkler, a drip irrigation pipe or other types of equipment, configured according to the specific needs of agriculture.The embodiment significantly reduces the manufacturing and operating costs of the device by reducing the number of pneumatic actuators to four, and using a low-power air pump 7 and a simplified pneumatic system. It is particularly suitable for handling highly miscible liquid scenarios, such as highly diluted fertilizer or pesticide solutions. This design not only optimizes energy use and improves device operation efficiency, but also ensures the economy and reliability of operation, providing a more convenient and economical online mixing solution for water, fertilizer, and pesticide for small-scale agricultural production or irrigation systems requiring fine control.

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

[0058] 1. Efficient and uniform mixing effect: Traditional static online mixers mainly rely on fixed blades to achieve liquid mixing, and their effectiveness is heavily dependent on liquid flow rate and viscosity. For a specific type of traditional static mixer, only a certain viscosity range of liquid fertilizer or pesticide can be mixed, and the applicability is poor. When facing liquid fertilizers and pesticides with large viscosity differences, the traditional mixer is prone to uneven mixing. The present application uses a bladeless tube wall sleeve design, which achieves full mixing of the liquid by controllable contraction and expansion of the tube wall sleeve. Due to the large shear force and disturbance generated by the movement of the tube wall sleeve, even when handling high-viscosity liquids, the uniformity of liquid mixing can be guaranteed, thereby greatly improving the use effect.

[0059] 2. Effective prevention of cross-contamination: The fixed blades of existing static mixers are prone to residual fertilizer or pesticide after mixing, making it difficult to clean thoroughly, resulting in cross-contamination problems in subsequent mixing operations. The present application uses a smooth tube wall sleeve structure, eliminating the traditional blade design. The tube wall sleeve can self-clean during contraction and expansion, effectively removing residual liquid fertilizer or pesticide, ensuring the purity of subsequent operations, and avoiding the problem of reduced chemical effectiveness of the mixed liquid caused by residual substances. This design greatly reduces the frequency and difficulty of equipment cleaning, reducing maintenance costs.

[0060] 3. Flexibility in adapting to various 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 to different characteristics of the liquid. The mixer of the present application can flexibly respond to the mixing needs of liquids of different viscosities and concentrations by adjusting the parameters of the pneumatic system (such as the contraction frequency and expansion amplitude of the tube wall sleeve), making it suitable for online mixing of various types of water, fertilizer, and pesticide. This flexibility makes the present application more suitable for use in facility agriculture, and can meet the diverse needs of water, fertilizer, and pesticide for different crops and different growth stages.

[0061] 4、Reduce the risk of chemical reaction and physical blockage: In traditional mixers, different types of liquid fertilizers and pesticides may have adverse chemical reactions, such as forming precipitates or generating harmful substances, which not only reduce the activity of active ingredients, but also may cause equipment blockage. The present invention reduces the residence time of liquid in the mixer through the innovative bladeless design and the movement of the pipe wall lining, reducing the probability of adverse chemical reactions. At the same time, due to the smooth surface of the pipe wall lining without fixed structure, it is not easy to accumulate precipitates and particulate matter, further reducing the risk of physical blockage, ensuring 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 blockage, which increases operating costs and downtime. The bladeless pipe wall lining online mixer of the present invention significantly reduces the operating cost 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 pesticide, it reduces the operation steps and improves the efficiency of agricultural production, providing a more economically viable solution for farmers.

[0063] In summary, the present invention overcomes many shortcomings of the prior art through the innovative bladeless pipe wall lining design, achieving efficient and uniform mixing, avoiding cross contamination, adapting to various liquids, reducing reaction risk and operating cost, etc. It provides a more efficient, flexible and economical online mixing solution for water, fertilizer and pesticide in facility agriculture. These advantages make the present invention have broad application prospects and market potential in the field of agriculture.

[0064] The same or similar parts in each embodiment in the specification can be referred to each other, and each embodiment focuses on the difference 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 part can be referred to the part 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 skilled person in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A plant protection bladeless inline mixer comprising a main mixing pipe, a first end of the main mixing pipe is provided with a diluent carrier inlet and a concentrate liquid inlet, a second end of the main mixing pipe is provided with an outlet, characterized in that, Also comprising: a plurality of pipe wall liners, each of the plurality of pipe wall liners being disposed inside the main mixing pipe, each of the plurality of pipe wall liners being switchable between a contracted state and an expanded state; a gas pump, the gas pump being connected with a solenoid valve, the solenoid valve being connected with a gas pressure pipeline, the gas pressure pipeline being in communication with the plurality of pipe wall liners, the solenoid valve being used to control the on-off and flow direction of high-pressure gas in the gas pressure pipeline, so as to switch the pipe wall liners between the contracted state and the expanded state; the gas pressure pipeline comprises a first gas pressure pipeline and a second gas pressure pipeline, the pipe wall liners comprise a first pipe wall liner and a second pipe wall liner, the first pipe wall liner being in communication with the first gas pressure pipeline, the second pipe wall liner being in communication with the second gas pressure pipeline; the first pipe wall liner and the second pipe wall liner are staggered; the solenoid valve is connected with the first gas pressure pipeline and the second gas pressure pipeline, the solenoid valve being a pneumatic two-position three-way solenoid valve, the solenoid valve periodically switching the gas flow direction through a pre-set electric control signal, and alternately providing gas pressure to the first gas pressure pipeline and the second gas pressure pipeline.

2. The plant-protection bladeless inline mixer of claim 1, wherein, the first pipe wall liner is made of food-grade silica gel; and / or, the second pipe wall liner is made of food-grade silica gel.

3. The plant protection bladeless inline mixer of any of claims 1-2, wherein, 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.

4. The plant-protection bladeless inline mixer of claim 3, wherein, The plurality of pipe wall liners are uniformly distributed inside the main mixing pipe.

5. The plant-protection bladeless inline mixer of claim 4, wherein, The pipe wall liners are provided in 16, the main mixing pipe has a length of 1000 mm, the outer diameter of the pipe wall liners is fixed at 160 mm, the inner diameter of the pipe wall liners in the contracted state is 120 mm, and the inner diameter of the pipe wall liners in the expanded state is 60 mm.

6. The plant-protection bladeless inline mixer of claim 4, wherein, The pipe wall liners are provided in 8, the main mixing pipe has a length of 900 mm, the outer diameter of the pipe wall liners is fixed at 160 mm, the inner diameter of the pipe wall liners in the contracted state is 120 mm, and the inner diameter of the pipe wall liners in the expanded state is 60 mm.

7. The plant-protection bladeless inline mixer of claim 4, wherein, The pipe wall liners are provided in 4, the main mixing pipe has a length of 800 mm, the outer diameter of the pipe wall liners is fixed at 160 mm, the inner diameter of the pipe wall liners in the contracted state is 138 mm, and the inner diameter of the pipe wall liners in the expanded state is 94 mm.

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