Manual Sprayer Leakage Prevention via Sealing Ring
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Solution Overview
Problem
Conventional manual sprayer devices for agricultural chemicals experience fluid leakage due to scuffing or softening of parts when exposed to aggressive chemicals, posing risks to operators and the environment.
Innovation Solution
A sprayer device with a pump assembly and sealing ring that collects and returns leaked fluid back into the tank through a leakage fluid collection chamber and return conduit, utilizing a sealing ring with interior lips to prevent leakage and ensure fluid retention until it is emptied and returned to the tank.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional gear or piston systems are used for pumping fluid, then pumping function is achieved, but fluid leakage occurs due to scuffing or softening of parts from aggressive chemicals
Solution Approach 1:
The pump assembly is divided into separate functional components: a pump chamber for fluid pumping, a collection chamber for capturing leakage fluid, and a return system. This segmentation isolates the leakage collection function from the pumping function, allowing the pumping system to operate while leakage is captured and returned separately, preventing chemical damage to surrounding components.
Solution Approach 2:
A collection chamber is introduced as an intermediary component between the pump chamber and the environment. This intermediary captures leakage fluid before it can cause harm, and provides a controlled path for returning the fluid to the tank, mediating the harmful interaction between leaked chemicals and external components.
2Reliability
If a leakage prevention system with collection chamber is implemented, then fluid leakage is captured, but device complexity increases
Solution Approach 1:
The collection chamber is integrated with the pump assembly as a unified structure rather than a separate external component. The return conduit is incorporated into the existing pump housing, merging multiple functions (leakage collection, fluid storage, and return flow) into a single integrated assembly, thereby reducing overall device complexity while maintaining leakage containment effectiveness.
Solution Approach 2:
The collection chamber serves multiple functions: it collects leakage fluid from the pump chamber, stores the captured fluid temporarily, and provides a pathway for returning the fluid to the tank. This multi-functionality reduces the need for separate components for each function, simplifying the overall device structure while achieving comprehensive leakage prevention.
3Reliability
If sealing ring with interior lips is added to retain leakage fluid, then fluid retention is improved, but manufacturing complexity increases
Solution Approach 1:
The sealing ring is constructed from a single homogeneous material with consistent properties throughout, rather than using composite materials or multi-layer constructions. The interior lips are formed as integral features of the same piece of material, simplifying the manufacturing process while maintaining effective sealing and fluid retention properties.
Solution Approach 2:
The sealing ring design utilizes material property parameters such as elasticity and hardness to achieve fluid retention through the interior lips configuration. By optimizing these material parameters, the sealing ring can effectively retain leakage fluid without requiring complex geometric features or multiple manufacturing steps, balancing retention effectiveness with manufacturing ease.
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 solution effectively prevents fluid leakage by using a sealing ring to retain leaked fluid until it can be safely returned to the tank, enhancing operator and environmental safety by minimizing exposure to chemicals.
Implementation Method 1
the leaked fluid from the piston chamber is deposited into a primary collection chamber from where it is expelled by the reciprocating action of the piston in an upward motion to a second collection chamber. In its downward movement, the fluid is pumped through a return siphon inside the tank.
Implementation Method 2
a sealing ring simplifies the return of fluid into the tank through the internal conduits without perforating the tank
Data Source
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AI summary
Improvements in an agricultural manual sprayer for preventing leakage of fluids such as insecticides, herbicides or fungicides that comprises tank with a large storage capacity into which a pressure vessel is installed. A manually activated pumping assembly is connected with the inferior section of the pressure vessel and also with the inferior section of the tank. The pumping assembly comprises a reciprocating piston pump for extracting the fluid from the storage tank and pressurizing it within the pressure vessel. The pressurized fluid is applied with a hose and a throttle valve attached to the pressure vessel. The assembly also comprises a double walled piston and barrier against leakage consisting of a ring with interior lips which seal it against the cylinder preventing the exit of fluid, forcing it to remain in the collection chamber until it is emptied with the downward movement of the piston.