Pump Discharge Valve Self-Sealing Mechanism
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Solution Overview
Problem
Conventional pumps face poor airtightness issues with discharge valves due to increased pumping pressure, compromising performance, especially in high-pressure modes.
Innovation Solution
A pump design featuring a discharge valve with a rod-shaped body, a seal ring, and a spring that enhances airtightness by using higher internal pressure to maintain a hermetic seal, allowing for selective operation between quick and high-pressure modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional discharge valve is used in the external cylinder, then the pump can operate in quick pumping mode, but the airtightness deteriorates under high pumping pressure
Solution Approach 1:
The patent converts the harmful effect of high gas pressure into a beneficial force by allowing the pressurized gas to push the discharge valve body against the seal ring, enhancing the hermetic seal. The gas pressure that would normally cause leakage is instead utilized to improve sealing effectiveness, eliminating the technical contradiction between productivity and airtightness.
2Productivity
If the discharge valve is disposed on the external cylinder with large diameter, then quick pumping mode is enabled, but the valve succumbs to pumping pressure after long use
Solution Approach 1:
The patent transforms the detrimental effect of pumping pressure on the valve into a beneficial sealing mechanism. The gas pressure acts on the valve body to press it against the seal ring, converting the force that would compromise valve strength into a force that enhances sealing reliability.
Solution Approach 2:
The discharge valve design allows the system's own operating pressure to perform the sealing function automatically. The high gas pressure during operation self-actuates the valve body against the seal ring, eliminating the need for external sealing mechanisms and allowing the valve to serve itself under operating conditions.
3Reliability
If a hermetic seal from within the cylinders is implemented, then airtightness increases with pumping pressure, but the valve structure becomes more complex
Solution Approach 1:
The valve design utilizes the system's own high gas pressure to automatically enhance the hermetic seal. The pressurized gas self-actuates the valve body against the seal ring, creating a self-regulating sealing mechanism that adapts to operating pressure without requiring complex external control systems or additional sealing components.
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 design ensures optimal airtightness and prevents leaks, maintaining performance across both pumping modes, with improved ease of assembly and structure simplicity.
Implementation Method 1
the higher the internal pressure is during the pumping process, the gas pressure causes the valve body to press against the seal ring under a higher pressure so as to provide a hermetic seal to the valve hole
Data Source
AI summary
A pump includes: a base with a through-hole flanked by an intake-hole and discharge-hole; an external cylinder fixed to the base; an end-fitting element disposed at external cylinder and having a through-hole; an internal cylinder inserted into the through-hole of end-fitting element and thereby partially received in external cylinder to fit coaxially inside external cylinder; a handle fixed to internal cylinder; a delivery pipe fixed to the base's through-hole and received coaxially in internal cylinder; an internal cylinder piston fixed to delivery pipe and received in internal cylinder; an external cylinder piston fixed to internal cylinder, received in external cylinder, and having a through-hole penetrated by delivery pipe; a check-valve disposed in intake-hole to ensure unidirectional gas movement therein; a discharge-valve disposed in discharge-hole; a control element for controlling discharge-valve to open and close; and a guide-channel communicating with the base's through-hole and intake-hole and connected to a nozzle.