Handheld Soil Disinfection Device with Spring-Ejected Needle
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Solution Overview
Problem
Existing soil disinfection devices, such as universal injectors, require manual insertion of needles into the soil, leading to operator fatigue and reduced efficiency due to soil resistance, especially when used for fixed-point disinfection of pathogenic bacteria like Ralstonia solanacearum.
Innovation Solution
A handheld soil fixed-point disinfection device with a force accumulation mechanism and adjustable handle, featuring a top-opened barrel with a liquid storage chamber, support rods, and a needle that can be easily inserted and ejected, along with an automatic liquid delivery system and adjustable features for comfort and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual insertion of needle into soil is used, then device simplicity is maintained, but operator fatigue increases and operation efficiency decreases
Solution Approach 1:
The needle is pre-loaded into the injector device in a ready-to-use position. The force accumulation mechanism is pre-charged with elastic potential energy through spring compression, awaiting trigger activation. This preliminary preparation eliminates the need for manual needle insertion during operation, reducing operator fatigue while maintaining operational efficiency.
Solution Approach 2:
The force accumulation mechanism automatically propels the needle into the soil without requiring manual insertion by the operator. The spring-loaded system self-activates upon triggering, performing the insertion function autonomously. This self-service capability reduces physical strain on the operator while maintaining device functionality.
2Productivity
If force accumulation mechanism is added to eject needle automatically, then operation efficiency improves, but device complexity increases
Solution Approach 1:
The force accumulation function is extracted as a separate, modular mechanism (spring-loaded system) that can be independently added to the injector device. This modular approach allows the core injection function to remain simple while the productivity-enhancing feature is added as a distinct component, making the complexity manageable and maintainable.
Solution Approach 2:
The spring mechanism is pre-compressed to store elastic potential energy before use. This preliminary energy storage enables rapid needle ejection without requiring complex power sources or control systems during operation. The simple spring-based approach achieves automatic ejection with minimal added complexity compared to motorized or pneumatic systems.
3Reliability
If needle insertion depth is increased to 30 cm for thorough disinfection, then disinfection effectiveness improves, but insertion force required increases causing operator fatigue
Solution Approach 1:
The spring force accumulation mechanism is pre-charged with sufficient elastic potential energy to propel the needle to the required 30 cm insertion depth. This preliminary energy storage ensures that the needle can penetrate deep into the soil without requiring sustained manual force from the operator, thereby maintaining disinfection effectiveness while reducing operator fatigue.
Solution Approach 2:
The force accumulation mechanism autonomously provides the necessary insertion force for deep needle penetration. The spring-loaded system self-generates the propulsive force required to reach 30 cm depth, eliminating the need for the operator to manually apply significant force. This self-service capability ensures thorough disinfection at the required depth without causing operator fatigue.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device is more labor-saving, comfortable to use, and adaptable for different users, providing efficient and automatic disinfection with reduced operator fatigue, while being multifunctional and cost-effective for various applications.
Implementation Method 1
a first spring provided in the force accumulation box and located at a top of the first slider
Data Source
AI summary
A handheld soil fixed-point disinfection device for a crop growth period is provided. The device includes a top-opened barrel, the barrel being internally divided into a liquid storage chamber and an assembly chamber; a plurality of support rods fixed at a bottom of the barrel; a target ring fixed at bottoms of the plurality of support rods and configured to contact a ground fixed point; a needle provided between the plurality of support rods and capable of being inserted into soil through the target ring to inject a fumigant liquid; and a force accumulation mechanism provided on the barrel and configured to eject the needle. The device not only is more labor-saving and simpler in use by ejecting the piercing needle, but also can be adapted for different people and used more comfortably through the handle with an adjustable angle and an adjustable length.