Pressure Indicator With Elastic Diaphragm and Check Valve
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Solution Overview
Problem
Existing pressure indicators have a narrow indication range, limited adaptability, and low accuracy, making them inadequate for current requirements in measuring pressure in laryngeal masks, tracheal intubation, or catheters.
Innovation Solution
A pressure indicator with a compact structure, featuring a check valve, elastic pressure-sensing diaphragm, and transmission indication rod, which includes a circular groove, positioning bulge, and reinforcing bars, allowing for wide pressure indication (10 cm to 100 cm water column) and high accuracy, suitable for both air and hydraulic pressure measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional pressure indicator structures are used, then the device is simple to manufacture, but the indication range is narrow and accuracy is low
Solution Approach 1:
The pressure indicator is divided into multiple functional components: an elastic pressure-sensing diaphragm for pressure detection, a transmission indication rod for mechanical transmission, a check valve for one-way pressure control, and a water column indication system. This segmentation allows each component to be optimized for its specific function, improving overall measurement precision while maintaining manufacturability through modular assembly
Solution Approach 2:
The pressure indicator is designed to measure both air pressure and hydraulic pressure through the same basic mechanism. The elastic diaphragm responds to pressure from either gas or liquid sources, and the water column indication system provides universal visual feedback. This multi-functionality expands the indication range without requiring separate devices for different pressure types
2Adaptability or versatility
If traditional pressure indicator structures are used, then the device is simple, but the adaptability is limited
Solution Approach 1:
The pressure indicator can be applied to multiple medical devices including laryngeal masks, tracheal intubation tubes, and catheters. The check valve allows the device to adapt to different pressure sources (air or hydraulic), and the water column indication provides universal visual feedback across different applications. This universality achieves high adaptability without significantly increasing structural complexity
Solution Approach 2:
The device adapts to different pressure ranges (10 cm to 100 cm water column) by utilizing the elastic properties of the diaphragm and the corresponding water column height changes. The same basic structure handles varying pressure parameters through physical parameter changes rather than requiring multiple specialized devices
3Measurement precision
If traditional pressure indicator structures are used, then the device is simple to manufacture, but the indication range is narrow (10 cm to 100 cm water column)
Solution Approach 1:
The pressure indicator uses a water column as the indication medium, leveraging hydraulic principles to provide direct visual measurement of pressure. The water column height corresponds directly to pressure values (10-100 cm range), eliminating the need for complex electronic sensors or scales. This hydraulic approach achieves wide indication range with simple manufacturing
Solution Approach 2:
The elastic pressure-sensing diaphragm is specifically designed with local elastic properties to respond to pressure changes across the 10-100 cm water column range. The diaphragm's material composition and thickness are optimized for this specific pressure range, enabling accurate indication without requiring multiple diaphragms or complex adjustment mechanisms
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 provides a wide range of pressure indication with high accuracy and adaptability, enabling precise monitoring and measurement of air and hydraulic pressures.
Implementation Method 1
an elastic pressure-sensing diaphragm, the elastic pressure-sensing diaphragm comprising a circumferential flange, a lower surface
Implementation Method 2
a check valve; an upper cover, the upper cover comprising an inner wall, a circular groove, and a positioning bulge
Data Source
AI summary
A pressure indicator, including: a check valve; an upper cover; an intermediate member; an elastic pressure-sensing diaphragm; a transmission indication rod; and a lower cover. The check valve is disposed in the upper cover, and the inner wall of the upper cover and the check valve are assembled to form an upper opening. The opening of an air channel which communicates with the air is disposed inside the circular groove. The positioning bulge of the upper cover is connected to the positioning groove of the intermediate member. The lower port of the intermediate member is bonded with the circumferential flange of the elastic pressure-sensing diaphragm. The lower surface of the elastic pressure-sensing diaphragm is provided with a groove configured to coordinate with the support end of the transmission indication rod. The connection rod is connected to the top and bottom of the support end.