A hangable mosquito larva control device

Abstract

The utility model provides a mosquito larvae control device can hang, including mosquito larvae killing agent case and even scattering device, mosquito larvae killing agent case sets up the even scattering device of connecting pipe intercommunication, even scattering device includes central storage tank, a plurality of even scattering pipes and first float base, central storage tank fixedly is established above first float base, the density of first float base is less than water makes central storage tank float on water, even scattering pipe is circumferential and set in central storage tank outside and communicates with central storage tank, even scattering pipe communicates the inner end of central storage tank and is higher than outer end, even scattering pipe both sides along pipeline sets up a plurality of liquid outlet holes. The utility model has the beneficial effects that can automatically adapt to water level change and realize the even diffusion of mosquito larvae killing agent, and the mosquito larvae killing agent flows to each even scattering pipe from central storage tank naturally, and seeps out to the surrounding water surface from the hole of both sides gently and evenly. Form a layer of even drug film on the water surface, continuously restrain the growth of the larva, realize the fundamental change from point drug delivery to surface coverage.

Description

Technical Field

[0001] This utility model relates to the field of mosquito control devices, specifically to a hangable mosquito larvae control device. Background Technology

[0002] Mosquitoes, as global disease-carrying insects, pose a threat far beyond the itching and skin inflammation caused by their bites. They transmit a variety of deadly infectious diseases through their blood-sucking activities, constituting a serious public health threat. Effectively controlling mosquito populations is crucial for preventing related diseases and protecting human health. Sewer systems, especially in pipes with accumulated debris, inspection wells, septic tanks, and slow-flowing branch pipes, often contain stagnant or poorly flowing water year-round. This stagnant water is neither evaporated by direct sunlight nor completely washed away by heavy rain, providing mosquitoes with a stable and continuous breeding ground.

[0003] Mosquito development consists of four stages: egg, wriggler, pupa, and adult. The wriggler stage, primarily completed in water, is the critical window for mosquito control. Wrigglers live in various still or slow-moving water bodies, and one of their most notable characteristics is their unique respiratory system. Unlike adults, they cannot directly breathe oxygen from the air; instead, they rely on a respiratory tube at the end of their body to overcome surface tension and exchange gases directly with the air. This behavior necessitates frequent surfacing to complete the respiration process. This characteristic not only constitutes a necessary condition for their survival but also provides us with a highly targeted intervention opportunity.

[0004] Based on the crucial biological characteristic that mosquito larvae must frequently surface to breathe, surface application of chemical larvicides has become an important strategy for controlling mosquito populations. These liquid formulations typically contain insect growth regulators or surfactants, and their mechanism of action involves forming a very thin film of the pesticide on the water surface or altering the surface tension of the water. When the larvae rise to the surface to breathe, their respiratory tract comes into contact with and penetrates this film, allowing the pesticide to enter their respiratory system, or causing them to suffocate and die due to blockage of their respiratory tract, thus achieving precise eradication at the source of their development. This targeted intervention theoretically has the advantages of high efficiency and minimal impact on non-target organisms.

[0005] However, in practice, to facilitate the replacement of larvicides, larvicide dispensers are typically suspended above the manhole opening. This process of dripping larvicides from a high position into the manhole has significant efficiency drawbacks. When larvicides drip from a height onto the water surface, the gravitational potential energy gives the dripping larvicides considerable kinetic energy, resulting in an unevenly distributed film that fails to achieve a continuous and effective lethal concentration in key areas where larvae are concentrated. This not only drastically reduces the actual utilization rate of the pesticide but also forces operators to increase the dosage and frequency of application to maintain effectiveness, thereby increasing economic costs. Utility Model Content

[0006] To address the issue that mosquito larvae drop from a height have significant kinetic energy when they reach the water surface, resulting in uneven distribution of the larval film; This utility model provides a hangable mosquito larvae control device, including a larvicides box and a spreading device. The larvicides box is fixedly installed at the outlet of a sewer well. The larvicides box is connected to the spreading device via a connecting pipe. The spreading device includes a central tank, multiple spreading pipes, and a first float base. The central tank is fixed above the first float base. The density of the first float base is less than that of water, allowing the central tank to float on the water. The spreading pipes are circumferentially arranged outside the central tank and are connected to the central tank. The inner end of the spreading pipe is higher than the outer end of the central tank. Multiple liquid outlet holes are opened along the pipes on both sides.

[0007] As a preferred embodiment, the top of the central storage tank is provided with an interface pipe connected to the connecting pipe, and the full-load flow rate of the interface pipe is not less than the sum of the full-load flow rates of all the uniformly distributed pipes.

[0008] As a preferred embodiment, a second float base is provided at the bottom of the outer end of the distributing pipe. The density of the second float base is less than that of water, providing buoyancy support for the distributing device.

[0009] As a preferred embodiment, the tilt angle of the uniform spraying tube is 15° to 45°.

[0010] As a preferred embodiment, the diameter of the first float base is greater than 1.5 times the diameter of the central storage tank.

[0011] As a preferred embodiment, an elevation column is fixedly installed above the first float base to adjust the tilt angle of the evenly spreading pipe, and the upper end of the elevation column is fixedly connected to the central storage tank.

[0012] As a preferred embodiment, the diameter of the first float base is greater than three times the height of the booster column.

[0013] As a preferred embodiment, the connecting pipe is equipped with a valve to control the flow rate of the mosquito larvae repellent.

[0014] The beneficial effects of this utility model are as follows: 1. This invention can automatically adapt to changes in water level and achieve uniform diffusion of the larvicidal agent. The distribution tube adopts an inner-high, outer-low design with outlet holes on both sides. This structure utilizes gravity to allow the larvicidal agent to flow naturally from the central storage tank to each distribution tube, and then slowly and evenly seep into the surrounding water surface from the holes on both sides, rather than being rapidly sprayed or dripped. This slow release method can form a uniform drug film on the water surface, continuously inhibiting the growth of mosquito larvae, thus achieving a fundamental shift from point application to surface coverage, greatly improving mosquito control efficiency and avoiding the problem of excessively high or low local drug concentrations.

[0015] 2. The first float base of this utility model ensures that the entire central storage tank can always float on the water surface. No matter how the water level in the well fluctuates due to rain or evaporation, the device can rise and fall accordingly, keeping the distribution pipe in the optimal working position on the water surface. Furthermore, the diameter of the first float base is designed to be 1.5 times larger than the diameter of the central storage tank. This low center of gravity and large chassis design gives the device excellent stability, effectively resisting the interference of weak water flow or wind in the well, preventing tipping, and ensuring its long-term normal operation. Attached Figure Description

[0016] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein... Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0018] The numbers in the attached diagram are: 1. Central storage tank; 2. Dispensing pipe; 3. First float base; 4. Liquid outlet; 5. Second float base; 6. Elevating column; 7. Connecting pipe; 8. Interface pipe; 9. Larvicide tank; 10. Valve. Detailed Implementation

[0019] To illustrate the features of this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will further explain this utility model.

[0020] Example: Please see Figure 1 and Figure 2This utility model provides a hangable mosquito larvae control device, comprising two main parts: a larvicide tank 9 and a spreading device. The larvicide tank 9 is fixedly installed near the manhole opening. A filling port is provided on the top of the larvicide tank 9 for easy addition of larvicide by operators. The installation height is lower than the manhole cover so as not to affect the manhole cover's fitment. The larvicide uses Bacillus thuringiensis solution. The larvicide tank is connected to the spreading device via a connecting pipe 7. A valve 10 on the connecting pipe 7 allows for manual control of the larvicide flow rate, which can be manually adjusted according to actual usage requirements.

[0021] The equalization device includes a central tank 1, six equalization pipes 2, and a first float base 3. The central tank 1 is fixed above the first float base 3 by a lifting column 6. The first float base 3 is made of a foam material with a density less than water, and its diameter is twice the diameter of the central tank 1 and four times the height of the lifting column 6, providing stable buoyancy support for the entire device so that the central tank 1 can float smoothly on the water surface.

[0022] The central storage tank 1 is equipped with an interface pipe 8 at its top, which is connected to the connecting pipe 7 via a socket connection. The full-load flow rate of the interface pipe 8 is designed to be the sum of the full-load flow rates of all the uniform spraying pipes 2, ensuring smooth delivery of the mosquito larvae.

[0023] Six evenly spaced distribution pipes 2 are circumferentially arranged on the outer side of the central storage tank 1 and remain in communication with it. The installation angle of the distribution pipes 2 is maintained at 30°, with the inner end connecting to the central storage tank 1 higher than the outer end, forming a certain inclination. A second float base 5 is provided at the bottom of the outer end of each distribution pipe 2. This second float base 5 is also made of a material with a density less than water, providing additional buoyancy support for the distribution pipe 2 and maintaining its stable working posture.

[0024] Multiple liquid outlet holes 4 are evenly distributed on both sides of each dispensing pipe 2. The mosquito larvae are evenly distributed onto the surface of the sewer water through these liquid outlet holes 4.

[0025] The first float base 3 and the second float base 5 work together to keep the entire device in a stable floating state. The larvicides in the larvicides tank are transported to the central storage tank 1 through the connecting pipe 7, and then distributed to each distributing pipe 2. Because the distributing pipes 2 have a certain angle of inclination, the larvicides flow naturally to the outlet holes 4 under gravity and are evenly released onto the water surface through these outlet holes 4, forming an effective mosquito control agent coating.

[0026] The device described in this embodiment achieves automatic and uniform distribution of mosquito larvicides within sewer wells, significantly improving mosquito control effectiveness while reducing pesticide waste. The device has a simple structure, is easy to install, requires no external power, and exhibits good practicality and reliability.

[0027] The above embodiments and accompanying drawings are only used to illustrate the technical solutions of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model. Other related technical structures not disclosed in detail in this utility model are existing technologies in the art.

Claims

1. A hangable mosquito larvae control device, comprising a larvae-killing agent box (9) and a distributing device, wherein the larvae-killing agent box (9) is fixedly installed at the outlet of a sewer well, and the larvae-killing agent box (9) is connected to the distributing device via a connecting pipe (7), characterized in that: The equalization device includes a central tank (1), multiple equalization pipes (2) and a first float base (3). The central tank (1) is fixed above the first float base (3). The density of the first float base (3) is less than that of water, so that the central tank (1) floats on the water. The equalization pipes (2) are arranged circumferentially outside the central tank (1) and are connected to the central tank (1). The inner end of the equalization pipe (2) is higher than the outer end of the central tank (1). Multiple liquid outlet holes (4) are opened on both sides of the equalization pipe (2).

2. The hangable mosquito larvae control device according to claim 1, characterized in that: The central storage tank (1) is provided with an interface pipe (8) at the top, which is connected to the connecting pipe (7). The full-load flow rate of the interface pipe (8) is not less than the sum of the full-load flow rates of all the uniformly distributed pipes (2).

3. The hangable mosquito larvae control device according to claim 1, characterized in that: The bottom of the outer end of the equalizing pipe (2) is provided with a second float base (5), the density of which is less than that of water, to provide buoyancy support for the equalizing device.

4. The hangable mosquito larvae control device according to claim 1, characterized in that: The tilt angle of the uniform spraying tube (2) is 15° to 45°.

5. The hangable mosquito larvae control device according to claim 1, characterized in that: The diameter of the first float base (3) is 1.5 times larger than the diameter of the central storage tank (1).

6. The hangable mosquito larvae control device according to claim 4, characterized in that: An elevation column (6) is fixedly installed above the first float base (3) to adjust the tilt angle of the evenly spreading pipe (2), and the upper end of the elevation column (6) is fixedly connected to the central storage tank (1).

7. The hangable mosquito larvae control device according to claim 6, characterized in that: The diameter of the first float base (3) is more than 3 times the vertical height of the heightening column (6).

8. The hangable mosquito larvae control device according to claim 1, characterized in that: The connecting pipe (7) is equipped with a valve (10) to control the flow rate of the mosquito larvae repellent.

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