Full-Plastic Liquid Pump Spring Relocation and Locking
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Solution Overview
Problem
Existing liquid pumps used in bottle-shaped packaging of daily chemical products face issues such as metal spring rust, contamination of liquids, complex recycling processes, and inefficiencies in air and liquid flow control, leading to increased production costs and environmental concerns.
Innovation Solution
A full-plastic liquid pump is designed with all parts made of plastic, featuring a pump body, pump head, piston, spring, threaded cover, one-way valve, and suction pipe. This design allows for complete recycling without sorting, energy savings, and environmental protection, along with a locking assembly for timely liquid extraction and prevention of accidental discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal spring is used in the liquid pump, then the pump head can be restored to the original position after pressing, but the spring can be easily rusted due to contact with liquid, causing liquid pollution and requiring separate recycling
Solution Approach 1:
The patent replaces the metal spring with a plastic spring that can be disposed of with the bottle body and liquid pump after use. The plastic spring, while having shorter service life than metal, eliminates the harmful rust pollution and enables unified recycling of all components as single-use items, resolving the contradiction between reliability and harmful factors.
Solution Approach 2:
The patent changes the material parameter of the spring from metal to plastic, fundamentally altering its chemical properties to be non-corrosive and compatible with the plastic bottle body. This material substitution eliminates rust pollution while maintaining the spring's mechanical restoration function through plastic elasticity.
2Ease of operation
If the plastic spring is arranged in the pump head and sleeves the piston rod, then the metal spring can be replaced for complete recycling, but the pump head outer diameter becomes large, increasing manufacturing consumables and production cost
Solution Approach 1:
The patent extracts the spring from the pump head assembly and relocates it to the bottle body, where it sleeves the piston rod externally. This separation allows the pump head to be smaller and more compact, reducing its outer diameter and manufacturing consumables, while the spring remains accessible for complete recycling with other plastic components.
Solution Approach 2:
The patent moves the spring from an internal position within the pump head to an external position on the bottle body, changing its spatial dimensionality. This relocation reduces the pump head's volume requirements and allows the spring to perform its function from a different spatial location, optimizing overall system compactness.
3Ease of operation
If the plastic spring emulsion pump structure is used, then recycling is convenient, but the air inlet channel and liquid outlet channel cannot be opened or closed in time, preventing quick liquid adsorption
Solution Approach 1:
The patent introduces a dynamic locking assembly with a locking ring and locking block that can timely open and close the air inlet channel and liquid outlet channel. The locking block can rotate to align with or block the locking ring's passage, dynamically controlling fluid flow paths to enable quick liquid adsorption while maintaining recycling convenience.
Solution Approach 2:
The locking assembly provides feedback-based control of the fluid channels, where the position of the locking block relative to the locking ring determines whether the channels are open or closed. This feedback mechanism ensures channels are opened or closed at the appropriate times to optimize liquid adsorption speed without compromising recycling ease.
4Device complexity
If the plastic spring emulsion pump lacks a locking assembly, then the structure is simpler, but the liquid cannot be locked and pressed according to needs, causing accidental discharge and waste
Solution Approach 1:
The patent segments the locking function from the main spring mechanism by introducing a separate locking assembly with a locking ring and locking block. This segmentation allows the locking control to be independently operated to secure the liquid, preventing accidental discharge, while the overall structure remains relatively simple and easy to manufacture.
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 full-plastic liquid pump achieves efficient and environmentally friendly operation by preventing liquid contamination, simplifying recycling processes, reducing production costs, and ensuring timely and controlled liquid extraction, thereby enhancing energy efficiency and environmental sustainability.
Implementation Method 1
The upper end of the elastic rib is fixed to the front side and the rear side of the lower surface of the truncated cone seat respectively. The projection of the two elastic ribs on a longitudinal plane is in the shape of '8'.
Data Source
AI summary
A full-plastic liquid pump includes a pump body, a pump head, a piston, a spring, a threaded cover, a one-way valve, and a suction pipe. Two ends of the pump head are respectively provided with a liquid outlet and a sliding pressing rod. The middle portion of the slidable pressing rod movably passes through a cover hole formed of the threaded cover. A piston is connected with the inner wall of the pump body to divide the inner space of the pump body into an air pressure cavity and a liquid storage cavity. A vent hole is formed in the upper portion of the pump body. An axial through hole is formed in the center of the piston. A lower end of the spring is fixed in the liquid storage cavity. The one-way valve is fixed in the liquid storage cavity corresponding to the suction pipe.