Pressure Control Valve Staged Opening for Anesthesia
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Solution Overview
Problem
Existing pressure control valves in anesthetic machines fail to accurately limit and position pressure values, leading to potential harm to patients due to inconsistent lung pressure during anesthesia operations.
Innovation Solution
A pressure control valve design featuring a cylindrical valve body with an air inlet, guiding pins, a valve core, a traveling guiding bar, a spiral guiding member, and a pressure spring, along with a fine-adjusting structure including an index plate and elastic device, allowing for precise adjustment and quick air exhaustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional pressure control valve is used, then the structure is simple, but the pressure positioning accuracy is poor
Solution Approach 1:
The valve core is segmented into multiple sections with different diameters, creating distinct sealing surfaces at different positions. This segmentation allows the valve to achieve accurate pressure positioning at multiple stages during the opening process, resolving the contradiction between simple structure and accurate pressure control.
Solution Approach 2:
The valve core is designed to dynamically open in stages rather than all at once. The spring-loaded mechanism creates a progressive opening sequence where the valve core moves through different positions, allowing dynamic pressure control and accurate positioning throughout the opening process.
2Speed
If the valve opens quickly to exhaust air, then the air exhaustion speed is fast, but the pressure control accuracy deteriorates
Solution Approach 1:
The valve opening process is divided into periodic stages through the multi-section valve core design. As the valve opens, different sections seal and open at different times, creating a periodic action pattern that allows controlled pressure release while maintaining overall fast exhaustion speed.
Solution Approach 2:
The valve core uses dynamic staged opening where the speed and position of opening are continuously adjusted through the spring mechanism and multi-section design, allowing the system to maintain both fast overall exhaustion speed and accurate pressure control during the process.
3Productivity
If the valve core opens completely at once, then the air exhaustion is efficient, but the pressure positioning cannot be controlled
Solution Approach 1:
The valve core is segmented into multiple sections that open in sequence rather than all at once. This segmentation maintains air exhaustion efficiency by keeping the overall opening process fast while enabling precise pressure positioning control through the staged opening of different sections at different pressure thresholds.
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 enables accurate positioning and limiting of pressure values, ensuring safer anesthesia operations by maintaining optimal lung pressure and facilitating quick air exhaustion.
Implementation Method 1
a pressure spring, having one end pressed against the valve core and the other end standing against the spiral guiding member
Implementation Method 2
a spiral guiding member, which is fitted up-and-down movably over the traveling guiding bar and is provided on its outer surface with spiral grooves into which the at least one guiding pin can be inserted
Data Source
AI summary
The present invention discloses a pressure control valve comprising: a cylindrical valve body which has a bottom wall and a side wall, wherein the bottom wall is provided thereon with an air inlet communicating with a device whose pressure to be limited, the side wall is provided with at least one guiding pin, and the cylindrical valve body has air outlets communicating with an exhausting system; a valve core, which is provided within the cylindrical valve body and in air-tight cooperation with the air inlet; a traveling guiding bar, having a lower end connected to the valve core; a covering fitted rotatably or up-and-down movably over the cylindrical valve body, for driving the traveling guiding bar to rotate or move up-and-down; a spiral guiding member, which is fitted up-and-down movably over the traveling guiding bar and is provided on its outer surface with spiral grooves into which the at least one guiding pin can be inserted; a pressure spring, having one end pressed against the valve core and the other end standing against the spiral guiding member.