Experimental device and method for killing pests based on airflow-electric field cooperation

Abstract

The invention discloses an experimental device and method for killing pests based on airflow-electric field cooperation, and relates to the technical field of agricultural plant protection and physical prevention and control. The device comprises an experiment cabin body, an airflow generating and conveying system, a high-voltage electric field killing system, a pest leading-in system and a collecting system. The airflow generating and conveying system is used for generating airflow in the experiment cabin body and conveying insect bodies; the high-voltage electric field killing system comprises a grounded plate electrode and a needle electrode connected with a high-voltage electrostatic generator, and the plate electrode and the needle electrode form a strong electric field discharge area in the cabin; the plurality of needle electrodes are connected through a metal plate and are lifted by using an insulating screw rod; the pest leading-in system is used for accurately leading pests to the discharge area; and the collecting system is used for collecting killed insect bodies. By means of the synergistic effect of airflow conveying and the high-voltage electric field, efficient and targeted killing of pests is achieved, the pest killing device has the advantage of being high in killing efficiency, and a standardized platform is provided for laboratory research of the physical prevention and control technology.

Description

Technical Field

[0001] This invention relates to a device and method for pest control in the laboratory, and particularly to an experimental device and method for pest control based on the synergistic effect of airflow and electric field, providing theoretical basis and experimental data for a new physical control method based on the synergistic effect of airflow and electric field. Background Technology

[0002] The long-term use of chemical pesticides has led to increasingly prominent problems such as enhanced pest resistance and environmental pollution. Physical control technologies have received widespread attention due to their environmentally friendly characteristics. Among them, high-voltage electrostatic field technology has been proven to have knockdown or lethal effects on a variety of insects, making it a potential green control method. However, existing electrostatic insecticidal devices mostly rely on pests actively contacting the net, which is inefficient and makes it difficult to accurately observe and optimize the killing process in a laboratory environment. How to efficiently and controllably transport pests to the core area of ​​the high-voltage electric field and achieve quantitative assessment of the killing effect is a challenge in existing technologies. Summary of the Invention

[0003] The purpose of this invention is to overcome the problems of long time and poor targeting in existing high-voltage electrostatic field insecticidal methods, and to provide an experimental device and method for insecticidal control based on airflow-electric field synergy. This device can simulate the real scenario of pests being carried by airflow through a high-voltage electric field, achieving efficient and controllable pest control, and providing a standardized experimental platform for research on the killing mechanism and parameter optimization.

[0004] An experimental device for pest control based on airflow-electric field synergy mainly includes: the experimental chamber is a square box made of transparent acrylic material, which is used to set a high voltage electric field to facilitate observation of the pest killing process inside; the two ends of the chamber are respectively provided with an inlet and an outlet.

[0005] The airflow generation and delivery system includes an axial flow fan and connecting pipes. The airflow generated by the fan is smoothly introduced into the experimental chamber through the connecting pipes and the square-round interface, forming a directional airflow from the inlet to the outlet.

[0006] The high-voltage electric field extermination system is the core of the device, comprising: an electrode; a stainless steel plate grounding electrode placed horizontally at the bottom of the chamber; a discharge electrode consisting of a rhomboid array of multiple brass needles, suspended above the grounding electrode by an insulating mounting plate (perforated acrylic plate); multiple needle electrodes connected by a perforated aluminum plate for easy conductivity; and an insulating mounting plate fixed to the top of the chamber by an insulating screw rod, the distance between the two electrodes being precisely controlled by adjusting the screw rod.

[0007] The high-voltage electrostatic generator is connected to the discharge electrode via a wire, providing it with high-voltage direct current. This creates a strong non-uniform electric field between the needle tip and the plate, generating corona discharge.

[0008] The pest introduction system is a vertical or inclined insulated pipe with an upper opening outside the chamber for introducing pests, and a lower outlet precisely aligned with the high-voltage discharge area between the discharge electrode and the grounding electrode. This design ensures that pests can be directly introduced into the electric field.

[0009] The collection system consists of an insect-collecting bag connected to the outlet end of the experimental chamber, used to collect the remains of pests killed by electric shock and to prevent them from escaping into the environment.

[0010] This invention also provides a method for pest control using the aforementioned device, comprising the following steps: First, the airflow system and the high-voltage electrostatic generator are activated sequentially to establish a stable airflow and electric field environment within the chamber. Then, the pests to be tested are introduced into the pest inlet of the pest introduction system. The pests fall under gravity and, upon entering the discharge area, are carried by the lateral airflow. During their passage through the high-voltage electric field, the pests are instantly killed by encountering high-energy charged particles (generated by corona discharge) and extremely high electric field strength. Finally, the killed pests are carried by the airflow through the chamber and fall into the insect collection bag at the end.

[0011] Compared with existing technologies, this invention has the following significant advantages: By organically combining airflow delivery with electric field killing, it achieves "dynamic targeted" pest control, solving the problem of random pest contact in traditional electrostatic fields, resulting in high killing efficiency. The transparent chamber design allows for direct observation and recording of the entire killing process. Key parameters such as airflow velocity, electric field voltage, and electrode spacing can be precisely adjusted, facilitating quantitative scientific research. High-voltage components are sealed within the chamber, and the pest introduction system uses insulated pipes, effectively ensuring operator safety. This device is particularly suitable for laboratory environments to study the killing thresholds of different pests under different airflow-electric field parameter combinations, providing theoretical basis and experimental support for the development of novel physical control equipment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the experimental apparatus of the present invention.

[0013] Figure 2 This is a partial structural schematic diagram of the airflow generation and delivery system of the present invention.

[0014] Figure 3 yes Figure 2 The front view.

[0015] Figure 4 yes Figure 2 The left view.

[0016] Figure 5 This is a partial structural schematic diagram of the high-voltage electric field extinguishing system of the present invention.

[0017] Figure 6 yes Figure 5 The front view.

[0018] The diagram is labeled as follows: 1-Axial flow fan; 2-Connecting pipe; 3-Square-round adapter; 4-Experimental chamber; 41-Insulated conveying pipe; 42-Insulated lead screw; 43-Insulated mounting plate; 44-Conductive reinforcing plate; 45-Discharge electrode; 46-Grounding electrode; 5-Insect collection bag. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention (taking whiteflies as an example), all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In this invention, a gradient electrode spacing is set between the discharge electrode (45) and the grounding electrode (46) by adjusting the insulating screw (42). The insect collection bag (5) is installed at the outlet of the cabin.

[0021] Furthermore, start the axial flow fan (1), and after the airflow speed in the chamber stabilizes, start the high voltage electrostatic generator (6) and slowly increase the output voltage until the blue light of corona discharge can be observed, indicating that a stable electric field has been established.

[0022] Furthermore, 20 adult whiteflies were picked up with a soft brush and dropped into the top inlet of the delivery pipe (41). The whiteflies fell inside the pipe and entered the discharge area from the outlet. It could be observed through the transparent bulkhead that the whiteflies were killed the moment they entered the discharge area and were then carried by the airflow into the insect collection bag (5).

[0023] Furthermore, after the experiment, the high-voltage power supply and fan were turned off, the insect collection bag (5) was removed, and the number of insects killed was counted and recorded. Under the conditions of this embodiment, the experiment was repeated three times, and the instantaneous killing rate of whiteflies was recorded.

[0024] The device of this invention simulates the scenario of pests being carried by airflow through a high-voltage electric field, achieving an efficient and visualized extermination process, and providing an effective tool for studying the physical control parameters of pests.

Claims

1. An experimental device for synergistic pest control based on airflow and electric field, characterized in that, include: An experimental chamber (4) is made of transparent material and is used for high-voltage electrostatic pest control experiments; an airflow generation and insect transport system is connected to the inlet of the experimental chamber (4) to generate airflow and introduce pests into the chamber; a high-voltage electric field killing system is set inside the experimental chamber (4) and includes a grounding electrode (46) and a discharge electrode (45) connected to a high-voltage electrostatic generator (6), wherein a discharge area for killing pests is formed between the discharge electrode (45) and the grounding electrode (46); an insect introduction system is located at the outlet of the discharge area and is used to transport pests to the discharge area. A collection system is provided at the outlet end of the experimental chamber (4) for collecting the killed pests and passing them through the airflow.

2. The experimental apparatus according to claim 1, characterized in that, The airflow generation and delivery system includes an axial flow fan (1) and a connecting pipe (2), which is sealed to the inlet end of the experimental chamber (4) through a square-round jack (3).

3. The experimental apparatus according to claim 1, characterized in that, The grounding electrode (46) is a plate-shaped structure and is horizontally fixed to the bottom of the experimental chamber (4); the discharge electrode (45) is a needle-shaped electrode array and is suspended above the grounding electrode (46) by an insulating mounting plate (43).

4. The experimental apparatus according to claim 3, characterized in that, The insulating mounting plate (43) is a perforated acrylic plate, which is connected to the top of the experimental chamber (4) via an insulating screw (42). The insulating screw (42) is used to adjust the electrode distance between the discharge electrode (45) and the grounding electrode (46).

5. The experimental apparatus according to claim 3 or 4, characterized in that, The insulating mounting plate (43) has a reinforcing plate (44) made of conductive material embedded in it. The tail of the discharge electrode (45) passes through the corresponding holes on the insulating mounting plate (43) and the reinforcing plate (44) and is electrically connected to the reinforcing plate. The reinforcing plate is connected to the output end of the high voltage electrostatic generator (6) through a wire.

6. The experimental apparatus according to claim 1, characterized in that, The pest introduction system is an insulated delivery pipe (41) with its inlet end located outside the experimental chamber (4) and its outlet end extending downwards and facing the discharge area.

7. The experimental apparatus according to claim 1, characterized in that, The collection system is an insect collection bag (5) located at the outlet end of the experimental chamber (4).

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