Pressing Pump Annular Seal Waterproofing
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Solution Overview
Problem
Existing pressing pumps allow external moisture to enter the pump body through gaps between the pump body and valve stem assembly, compromising waterproof performance.
Innovation Solution
The design incorporates an annular part that seals against the pump body, creating a tortuous air supplementing path for air to enter, reducing the likelihood of moisture ingress, with a ventilation hole and channels that direct air flow in a way that increases the path length and resistance to moisture entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If air supplementation is allowed through the gap between pump body and valve stem assembly, then air can enter the container during liquid transfer, but external moisture can also enter the pump body through the same gap
Solution Approach 1:
The air supplementation function is segmented from the general gap between pump body and valve stem assembly. A dedicated air supplementation channel is created through the annular part, separating the air entry path from the potential moisture ingress path through the gap. This allows air to enter through the controlled channel while the gap can be sealed or minimized for waterproofing.
Solution Approach 2:
The annular part acts as an intermediary component that mediates between the need for air supplementation and the requirement for waterproofing. It provides a controlled interface with a dedicated air channel that directs air flow away from the gap region, preventing moisture from entering through the gap while still allowing air to reach the container.
2Reliability
If the annular part is added to seal against the pump body, then waterproof performance is improved, but the device structure becomes more complex
Solution Approach 1:
The annular part performs multiple functions simultaneously: it seals against the pump body to prevent moisture ingress, provides structural support for the valve stem assembly, and incorporates the air supplementation channel. By combining sealing, support, and air channel functions into a single component, the overall structural complexity is minimized while achieving reliable waterproofing.
Solution Approach 2:
The sealing function and air channel function are merged into the annular part. Instead of having separate sealing rings and separate air channels, the air channel is integrated directly into the annular part structure, allowing it to serve both as a seal and as the air supplementation pathway. This reduction in component count simplifies the overall device structure.
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
This configuration significantly reduces the entry of external moisture into the pump body, enhancing waterproof performance and preventing contamination, while allowing for effective air supplementation.
Implementation Method 1
the outer circumference of the annular part sealably abuts against the inner wall of the accommodating cavity
Implementation Method 2
The one-way valve is arranged at the liquid inlet. When the valve stem assembly moves away from the liquid inlet at the bottom end of the pump body, negative pressure is formed in a liquid storage cavity
Implementation Method 3
When the valve stem assembly moves away from the liquid inlet at the bottom end of the pump body, negative pressure is formed in a liquid storage cavity at the bottom end of the pump body, such that the liquid storage cavity suctions liquid from the liquid inlet
Implementation Method 4
When the valve stem assembly moves close to the liquid inlet, liquid in the liquid storage cavity is squeezed into a liquid outlet channel in the valve stem assembly
Data Source
AI summary
The present invention discloses a pressing pump and a liquid container. The pressing pump comprises a pump body, a one-way valve, a valve stem assembly, a pressing head and an annular part. The pump body is provided with an accommodating cavity. The annular part is inserted into the accommodating cavity, and the outer circumference of the annular part sealably abuts against an inner wall of the accommodating cavity. The pressing head is provided with a second channel which communicates with the first channel. The second channel has a first opening which is disposed on the side wall of the pressing head close to the pump body and is located at an outer side of the annular part. The pressing pump provided in the present invention can reduce the circumstances in which external moisture enters the interior of the pump body, and improve the waterproof performance.