A kind of pesticide spraying spray bar nozzle anti-blocking device

Abstract

This utility model discloses an anti-clogging device for a pesticide spraying boom nozzle, including a mounting plate with mounting holes and a spray boom body. A nozzle body is connected to the bottom of the mounting plate corresponding to the lower part of the spray boom body. Within the spray boom body and nozzle body are a vertically movable unblocking rod, a driving assembly, and a reset assembly. The driving assembly includes an iron rod with a cable wound around its outer diameter. A normally open switch is connected in series on the cable, and both ends of the cable are connected to a power source. The reset assembly includes a reset spring for pushing the unblocking rod upwards. By combining electromagnetic drive with spring reset, the unblocking rod automatically moves up and down. The device has a simple structure and rapid response. Unblocking can be initiated manually by pressing the switch when a blockage is detected, improving the ease of use of the spraying system. The reset spring quickly pushes the unblocking rod back to its original position, achieving automatic reset and ensuring the nozzle maintains a clear spraying path even when not blocked.

Description

Technical Field

[0001] This utility model relates to the field of pesticide spraying device technology, and in particular to a pesticide spraying boom nozzle anti-clogging device. Background Technology

[0002] The anti-clogging device for pesticide spraying boom nozzles effectively solves the clogging problem caused by pesticide impurities or crystals during operation of traditional nozzles, significantly improving the stability and operating efficiency of the spraying system. By integrating flow monitoring and mechanical unblocking functions, the device can detect clogging in real time and trigger an alarm. With the help of manual or semi-automatic unblocking mechanisms, it can quickly restore the nozzle to normal operation, reduce downtime for cleaning, and lower manual maintenance costs.

[0003] In existing technologies, nozzles are prone to clogging, leading to uneven spraying, affecting the control effect, and even causing phytotoxicity. For multi-nozzle sprayers, clogging of a single nozzle is not easily detected in time, easily causing localized missed spraying. Currently, the main method to determine whether a nozzle is clogged is by manual observation, which is inefficient and prone to oversights. Utility Model Content

[0004] The purpose of this invention is to provide an anti-clogging device for pesticide spraying boom nozzles, in order to solve the problem mentioned in the background art that clogging of a single nozzle is not easily detected in time.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pesticide spraying boom nozzle anti-clogging device, comprising a mounting plate, mounting holes and a spray boom body on the mounting plate, a nozzle body connected to the bottom of the mounting plate corresponding to the lower part of the spray boom body, a vertically movable unblocking rod, a driving assembly and a reset assembly within the spray boom body and the nozzle body, the driving assembly comprising an iron rod with a cable wound around its outer diameter, a normally open switch connected in series on the cable, and a power supply connected to both ends of the cable, the reset assembly comprising a reset spring for pushing the unblocking rod upward.

[0006] In this preferred embodiment of the technical solution, an input pipe is connected to the outer wall of the spray bar, and a water flow sensor for monitoring the pesticide flow rate at the input pipe is connected in series on the input pipe.

[0007] Based on the preferred embodiment of this technical solution, the top of the unblocking rod is integrally formed with a movable block, the top of the movable block is provided with a groove, a magnet is attached in the groove, and the polarity of the iron rod facing the magnet is the same as the polarity of the magnet facing the iron rod.

[0008] In this preferred embodiment of the technical solution, a return spring is sleeved on the outer diameter of the unblocking rod to press the moving block, causing the moving block to move towards the side closer to the iron rod.

[0009] In the preferred embodiment of this technical solution, a rubber cylinder is interference-fitted at the outer diameter of the unclogging rod, adhesive is provided between the unclogging rod and the rubber cylinder, and several sealing rings are integrally formed on the radial surface of the rubber cylinder. The sealing rings are attached to the inner wall of the spray rod, and the top of the return spring is attached to the bottom of the rubber cylinder.

[0010] Based on the preferred embodiment of this technical solution, a protective barrel is spirally connected to the top of the spray bar, with the opening of the protective barrel facing upwards. An iron rod is engaged inside the protective barrel, and the diameter of the iron rod is smaller than the inner diameter of the protective barrel. Epoxy resin potting compound for fixing the cable wound on the iron rod is injected between the iron rod and the protective barrel.

[0011] Based on the preferred embodiment of this technical solution, the nozzle body includes an externally threaded cylinder that meshes with the inner diameter of the spray bar, a sealing ring is fitted at the outer diameter of the externally threaded cylinder, and the outer wall of the nozzle body is provided with an anti-slip protrusion.

[0012] Based on the preferred embodiment of this technical solution, a cylinder is meshed with the corresponding external threaded cylinder inside the nozzle body. The side wall of the cylinder has a discharge port for discharging pesticides from the spray bar body and nozzle body. A lip seal is adhered inside the cylinder, and the lip seal is fitted to the outer wall of the unblocking rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By combining electromagnetic drive with spring reset, the unblocking rod can move up and down automatically. The structure is simple and the response is fast. When a blockage is detected, the unblocking action can be performed by manually pressing the switch, without much manual intervention, which improves the ease of use of the spraying system.

[0015] 2. After power failure, the unblocking rod can be quickly pushed back to its original position by the reset spring, realizing automatic reset, ensuring that the nozzle maintains a normal spraying channel when not unblocked, and at the same time ensuring the repeatability of the action cycle and the reliability of the structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the anti-clogging device for pesticide spraying boom nozzles according to the present invention;

[0017] Figure 2 This is a schematic diagram of the unblocking rod structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the spray bar structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the nozzle body structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the protective bucket structure of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Mounting plate; 11. Spray bar body; 111. Input pipe; 112. Water flow sensor; 12. Mounting hole; 2. Nozzle body; 20. Anti-slip raised edge; 201. Sealing ring; 21. External threaded cylinder; 22. Cylinder; 221. Discharge port; 31. Iron rod; 32. Protective barrel; 331. Moving block; 332. Unblocking rod; 333. Return spring; 334. Rubber cylinder; 3341. Sealing ring. Detailed Implementation

[0022] In modern agricultural production, the application of plant protection machinery has become an important means to ensure the healthy growth of crops, improve the efficiency of pest and disease control, and reduce the intensity of manual labor. Among them, pesticide spraying equipment, as the core tool of plant protection operations, directly affects pesticide utilization, control effect, and agricultural production efficiency. Boom sprayers, due to their wide working width, uniform spraying, and high efficiency, are widely used in various agricultural scenarios such as field crops, orchards, and tea gardens. However, in actual operation, nozzle clogging has long plagued agricultural producers, seriously affecting the normal operation of the spraying system. Therefore, the development and application of efficient and reliable anti-clogging devices for pesticide spray boom nozzles has extremely important practical significance and far-reaching technical value. First, nozzle clogging is a common and frequent technical problem in plant protection operations. The causes of clogging are varied, mainly including: insoluble impurities in pesticide technical, sediment or hard water deposits mixed in during pesticide preparation, residual crystals in the pesticide solution after long-term use, and biofilm formation due to microbial growth inside the nozzle. Especially when using pesticides that are prone to settling, such as suspension concentrates and wettable powders, the risk of clogging increases significantly. Once a nozzle becomes clogged, it will directly lead to localized interruption of spraying or poor atomization, resulting in uneven distribution of the pesticide solution, and phenomena such as missed spraying and overspraying. This not only reduces the control effect of pests and diseases, but may also cause phytotoxicity due to excessive local dosage, affecting normal crop growth, and even leading to reduced yield or crop failure. Therefore, the introduction of anti-clogging devices can effectively reduce the occurrence of such problems and ensure the continuity and uniformity of spraying operations. Secondly, traditional methods of dealing with nozzle clogging are inefficient and seriously restrict the progress of operations. Currently, most sprayers still rely on manual periodic inspection and manual cleaning of nozzles. Operators need to frequently stop the machine during operation to disassemble each nozzle for flushing or needle cleaning, which is time-consuming, labor-intensive, and physically demanding. In large-scale continuous operations, this maintenance method not only interrupts the operation process and reduces the overall efficiency of the machine, but may also miss the best control opportunity due to untimely inspection. Especially in high temperature, high humidity, or harmful gas environments, prolonged exposure also poses a threat to the health of operators. Sprayer systems equipped with automatic or semi-automatic anti-clogging devices can respond quickly upon detecting blockages, clearing them rapidly through mechanical or electromagnetic means. This significantly reduces downtime, improves operational continuity, and meets the demands of efficient and intensive modern agricultural production. Furthermore, the introduction of anti-clogging devices helps improve pesticide utilization, achieving green and sustainable agriculture. Statistics show that pesticide waste due to nozzle clogging and poor atomization in traditional spraying operations can reach 10% to 30%. Incompletely atomized pesticide solutions easily form large droplets, which are easily blown away by the wind or roll directly onto the ground, not only reducing efficacy but also increasing environmental pollution risks such as soil pollution, water pollution, and harm to non-target organisms.Maintaining nozzles in optimal working condition through anti-clogging devices ensures uniform atomization of pesticides at the designed particle size, significantly improving pesticide adhesion and coverage within the crop canopy, reducing drift and runoff. This reduces pesticide usage while ensuring effective control, aligning with the "reduced pesticides, increased efficiency" green plant protection concept and contributing to sustainable agricultural development. Furthermore, advanced anti-clogging technology drives the intelligent upgrading of plant protection machinery. Modern anti-clogging devices often integrate with intelligent components such as sensors, microprocessors, and alarm systems, forming a closed-loop control system of "sensing-judgment-response." For example, water flow sensors monitor the flow rate of each nozzle in real time, microprocessors automatically identify anomalies and locate clogged nozzles, alerting operators with audible and visual alarms, and even enabling one-click or multi-point simultaneous unclogging in conjunction with automatic control circuits. This intelligent management not only enhances the automation level of equipment but also provides data support for precision agriculture. By accumulating and analyzing data on clogging frequency, location, and pesticide type, application plans can be optimized, guiding pesticide selection and equipment maintenance, achieving a shift from "experience-based application" to "data-driven application." From an equipment maintenance perspective, anti-clogging devices can effectively extend the service life of nozzles and the entire machine. Frequent disassembly and cleaning are not only time-consuming but also prone to mechanical damage such as nozzle thread wear, seal aging, and spray blade deformation, increasing equipment maintenance costs. Online automatic unclogging avoids repeated disassembly and reduces the risk of human-caused damage. Simultaneously, a good sealing design and protective structure (such as epoxy resin potting, lip seals, and rust-proof coatings) can effectively isolate pesticides from corroding internal components such as electromagnetic parts and springs, improving the overall durability and reliability of the system and reducing long-term operating costs. Finally, from the perspective of agricultural mechanization and intelligent development, nozzle anti-clogging technology is a key element in enhancing the core competitiveness of plant protection equipment. With the popularization of high-end equipment such as drones, self-propelled sprayers, and intelligent navigation systems, higher demands are placed on the stability, reliability, and intelligence level of spraying systems. A nozzle system with automatic unclogging function is not only a reflection of equipment performance but also an important guarantee for user satisfaction and market competitiveness. It can significantly improve operational efficiency, lower the barrier to entry, reduce human intervention, and make plant protection operations safer, more efficient, and more environmentally friendly, thus promoting the modernization of agriculture in my country.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5This utility model provides an embodiment of an anti-clogging device for a pesticide spraying boom nozzle, comprising a mounting plate 1, mounting holes 12 and a spray boom body 11, with a nozzle body 2 connected to the bottom of the mounting plate 1 corresponding to the lower part of the spray boom body 11. The spray boom body 11 and nozzle body 2 contain a vertically movable unblocking rod 332, a driving assembly, and a reset assembly. The driving assembly includes an iron rod 31 with a cable wound around its outer diameter, a normally open switch connected in series on the cable, and power supplies connected to both ends of the cable. The reset assembly includes a reset spring 333 for pushing the unblocking rod 332 upward. Through the combination of electromagnetic drive and spring reset, the unblocking rod 332 automatically moves up and down. The device has a simple structure and rapid response; unblocking can be performed by manually pressing the switch when a blockage is detected, requiring minimal manual intervention and improving the ease of use of the spraying system.

[0025] Please see Figure 1-5 A further solution based on this embodiment is as follows: an input pipe 111 is connected to the outer wall of the spray bar body 11, and a water flow sensor 112 for monitoring the pesticide flow rate at the input pipe 111 is connected in series on the input pipe 111. By monitoring the pesticide flow rate in real time through the water flow sensor 112, the flow rate drop caused by nozzle blockage can be detected in time, providing a basis for judgment to automatically trigger the unblocking mechanism, realizing the closed-loop control of "intelligent perception - sound and light alarm", and improving the intelligence level of the device.

[0026] Please see Figure 1-4 A further solution based on this embodiment is as follows: the top of the unblocking rod 332 is integrally formed with a movable block 331, the top of the movable block 331 is provided with a groove, and a magnet is attached in the groove. The polarity of the iron rod 31 facing the magnet is the same as the polarity of the magnet facing the iron rod 31. Utilizing the principle of repulsion between like magnetic poles, when the cable on the iron rod 31 is energized, the iron rod 31 becomes an electromagnet, which can efficiently drive the movable block 331 to move the unblocking rod 332 downward. The driving force is stable and the response is fast.

[0027] Please see Figure 1-4 A further solution based on this embodiment is as follows: the reset spring 333 is sleeved on the outer diameter of the unblocking rod 332 to squeeze the moving block 331, causing the moving block 331 to move towards the side closer to the iron rod 31. After the power is cut off, the unblocking rod 332 can be quickly pushed back to its original position by the reset spring 333 to achieve automatic reset, ensuring that the nozzle maintains a normal spraying channel when it is not unblocked, while ensuring the repeatability of the action cycle and the reliability of the structure.

[0028] Please see Figure 1-4A further solution based on this embodiment is as follows: a rubber cylinder 334 is interference-fitted at the outer diameter of the unblocking rod 332, and glue is provided between the unblocking rod 332 and the rubber cylinder 334. Several sealing rings 3341 are integrally formed on the radial surface of the rubber cylinder 334. The sealing rings 3341 are in contact with the inner wall of the spray bar body 11, and the top of the return spring 333 is in contact with the bottom of the rubber cylinder 334. The rubber cylinder 334 and its sealing rings 3341 form a multi-stage dynamic sealing structure, which can prevent pesticide leakage in the spray bar body 11 and ensure stable system pressure. At the same time, it protects the iron rod 31 and the cable from pesticide corrosion, improves the sealing performance and durability of the device, and the iron rod 31 is coated with anti-rust paint. The unblocking rod 332 drives the rubber cylinder 334 and the sealing rings 3341 to move downward quickly, which can impact the outlet 221 and reduce the possibility of blockage at the outlet 221.

[0029] Please see Figure 1-4 A further embodiment of this solution is as follows: a protective barrel 32 is spirally engaged with the top of the spray bar 11, with the opening of the protective barrel 32 facing upwards. An iron rod 31 is engaged inside the protective barrel 32, and the diameter of the iron rod 31 is smaller than the inner diameter of the protective barrel 32. Epoxy resin potting compound is injected between the iron rod 31 and the protective barrel 32 to fix the cable wound on the iron rod 31. Through the combined action of the protective barrel 32 and the epoxy resin potting compound, the iron rod 31 and its wound cable are sealed and fixed, reducing the intrusion of pesticides, moisture and dust, improving the insulation, waterproofing and mechanical stability of the electrical parts, and ensuring the long-term reliable operation of the electromagnetic drive system.

[0030] Please see Figure 2-5 A further solution based on this embodiment is as follows: The nozzle body 2 includes an externally threaded cylinder 21 that meshes with the inner diameter of the spray bar body 11. A sealing ring 201 is fitted on the outer diameter of the externally threaded cylinder 21. The outer wall of the nozzle body 2 is provided with an anti-slip protrusion 20. By connecting the sealing ring 201 with the threaded connection, a firm installation and reliable seal between the nozzle body 2 and the spray bar body 11 can be achieved, preventing leakage at the interface. The anti-slip protrusion 20 is easy to hold during manual installation or disassembly, improving the ease of operation.

[0031] Please see Figure 2-5 A further solution based on this embodiment is as follows: a cylinder 22 is meshed with the external threaded cylinder 21 inside the nozzle body 2. The side wall of the cylinder 22 has a discharge port 221 for discharging pesticides from the spray bar body 11 and the nozzle body 2. A lip seal is adhered inside the cylinder 22. The lip seal fits against the outer wall of the unblocking rod 332. The lip seal can maintain good dynamic sealing performance during the reciprocating motion of the unblocking rod 332, effectively preventing pesticide leakage, while allowing the unblocking rod 332 to move freely downward to perform the unblocking action.

[0032] Working Principle: Pesticide enters the spray bar body 11 and nozzle body 2 through the input pipe 111, and is sprayed out from the outlet 221 and the inner diameter of the cylinder 22. During normal spraying, the water flow sensor 112 monitors the pesticide flow rate in the input pipe 111 in real time and continuously transmits the flow data to the microprocessor unit. The microprocessor unit receives the flow signals from the water flow sensors 112 corresponding to each nozzle and judges the spraying status of each nozzle according to the preset normal flow threshold. When the flow rate at a nozzle is lower than the set threshold, the microprocessor unit determines that the nozzle is blocked and immediately issues an audible and visual alarm signal through the alarm unit. At the same time, the number of the blocked nozzle is displayed on the display screen to remind the operator to deal with it in time. After observing the alarm, the operator manually presses the normally open switch corresponding to the nozzle to close the circuit and supply power to the cable on the iron rod 31. After the iron rod 31 is energized, it becomes an electromagnet, and the magnetic field it generates generates a repulsive force with the magnet in the groove of the moving block 331. The moving block 331 drives the unblocking rod 332 to move rapidly downwards against the elastic force of the return spring 333. During the downward movement, the rubber cylinder 334 and its sealing ring 3341 slide along the inner wall of the spray bar body 11 to maintain a seal. At the same time, the unblocking rod 332 drives the rubber cylinder 334 to impact the area of ​​the outlet 221, which helps to dislodge the blockage. The unblocking rod 332 also unblocks the inner diameter of the cylinder 22. When the operator releases the switch, the circuit is disconnected, the iron rod 31 is demagnetized, the return spring 333 releases its elastic force, and pushes the rubber cylinder 334 and the unblocking rod 332 upwards to return to their initial positions. The nozzle resumes normal spraying. If the unblocking cannot be achieved by pressing the normally open switch multiple times, the worker wears rubber gloves and disassembles the nozzle body 2 for a deeper cleaning. The power supply, microprocessor unit, water flow sensor 112, display screen, normally open switch, alarm unit, and corresponding electrical control wiring, program control, and display interface are all existing technologies. Their working principles will not be described in detail here.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preventing clogging of a pesticide spraying boom nozzle, characterized in that: It includes a mounting plate (1), which has mounting holes (12) and a spray bar body (11). The bottom of the mounting plate (1) is connected to the nozzle body (2) below the spray bar body (11). Inside the spray bar body (11) and the nozzle body (2), there is a drain rod (332) that moves up and down, a drive assembly and a reset assembly. The drive assembly includes an iron rod (31) with a cable wound around its outer diameter. A normally open switch is connected in series on the cable. Power is connected to both ends of the cable. The reset assembly includes a reset spring (333) for pushing the drain rod (332) to move upward.

2. The anti-clogging device for the spray boom nozzle of pesticide spraying according to claim 1, characterized in that: An input pipe (111) is connected to the outer wall of the spray bar body (11), and a water flow sensor (112) for monitoring the pesticide flow rate at the input pipe (111) is connected in series on the input pipe (111).

3. The anti-clogging device for the spray boom nozzle of pesticide spraying according to claim 2, characterized in that: The top of the unblocking rod (332) is integrally formed with a movable block (331). The top of the movable block (331) is provided with a groove, and a magnet is attached to the groove. The polarity of the iron rod (31) facing the magnet is the same as the polarity of the magnet facing the iron rod (31).

4. The anti-clogging device for the spray boom nozzle of pesticide spraying according to claim 3, characterized in that: The reset spring (333) is sleeved on the outer diameter of the unblocking rod (332) and squeezes the moving block (331) to move the moving block (331) closer to the iron rod (31).

5. The anti-clogging device for the spray boom nozzle of pesticide spraying according to claim 4, characterized in that: A rubber cylinder (334) is interference-fitted at the outer diameter of the unclogging rod (332). Adhesive is provided between the unclogging rod (332) and the rubber cylinder (334). Several sealing rings (3341) are integrally formed on the radial surface of the rubber cylinder (334). The sealing rings (3341) are attached to the inner wall of the spray bar body (11). The top of the return spring (333) is attached to the bottom of the rubber cylinder (334).

6. The anti-clogging device for the spray boom nozzle of pesticide spraying according to claim 5, characterized in that: The top of the spray bar (11) is spirally connected to a protective barrel (32), with the opening of the protective barrel (32) facing upwards. The iron rod (31) is engaged inside the protective barrel (32), and the diameter of the iron rod (31) is smaller than the inner diameter of the protective barrel (32). Epoxy resin potting compound is injected between the iron rod (31) and the protective barrel (32) to fix the cable wound on the iron rod (31).

7. The anti-clogging device for the spray boom nozzle of pesticide spraying according to claim 6, characterized in that: The nozzle body (2) includes an external threaded cylinder (21) that meshes with the inner diameter of the spray bar body (11), a sealing ring (201) is fitted on the outer diameter of the external threaded cylinder (21), and the outer wall of the nozzle body (2) is provided with an anti-slip protrusion (20).

8. The anti-clogging device for the spray boom nozzle of pesticide spraying according to claim 7, characterized in that: A cylinder (22) is meshed with the external threaded cylinder (21) inside the nozzle body (2). The side wall of the cylinder (22) has an outlet (221) for discharging pesticides from the spray bar body (11) and the nozzle body (2). A lip seal is glued inside the cylinder (22), and the lip seal is attached to the outer wall of the unblocking rod (332).

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