Mechanical Fluid Control Valve With Adjustable Spring Prestress
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Solution Overview
Problem
Conventional fluid control valves either rely on costly electronic components for switching functions or lack the ability to open and close the valve door, limiting their functionality and maintenance ease.
Innovation Solution
A fluid control valve with a mechanical switch, utilizing a tube body, rod body, elastic members, and an adjustment member to adjust prestress levels, allowing the valve plate to open or close purely through mechanical means, controlling fluid flow without electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an electronic pressure detection mechanism is used in a switch valve, then the valve can automatically open or close when pressure reaches a certain degree, but the cost of components and maintenance remains high
Solution Approach 1:
The patent replaces the electronic pressure detection mechanism with a pure mechanical pressure detection system. The mechanical switch uses a spring-loaded piston that directly responds to pressure changes, eliminating the need for electronic sensors, circuits, and associated components. This mechanical substitution maintains automatic valve operation while significantly reducing component complexity and maintenance requirements.
Solution Approach 2:
The mechanical switch system is self-regulating and self-actuating. The spring-loaded piston automatically detects pressure changes and triggers the valve operation without requiring external power sources, control systems, or electronic intervention. The system serves itself by using the process fluid's own pressure to activate the switching mechanism.
2Device complexity
If a conventional non-return valve with simple mechanical structure is used, then the structure remains simple, but the valve lacks the function of opening or closing the valve door
Solution Approach 1:
The patent merges the non-return valve function with the switch valve function into a single integrated device. The mechanical switch mechanism is combined with the valve door operation, allowing the same mechanical structure to perform both unidirectional flow control and controlled opening/closing operations. This integration adds versatility while maintaining mechanical simplicity.
Solution Approach 2:
The mechanical switch system provides multiple functions: it acts as a pressure-actuated switch, a valve actuator, and maintains non-return functionality. The single mechanical structure serves universal purposes, eliminating the need for separate electronic control systems and enhancing the adaptability of the valve to different operational requirements.
3Device complexity
If a mechanical switch structure is used to control fluid flow, then component cost and maintenance are reduced, but the valve must be adjustable between normally open or close status
Solution Approach 1:
The mechanical switch incorporates an adjustable mechanism that allows the valve to be configured for either normally open or normally closed operation. The spring preload or mechanical linkage can be adjusted to change the default valve state, providing operational flexibility without requiring different valve designs. This dynamic adjustability simplifies installation and adaptation to different system requirements.
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 mechanical switch design reduces component costs and simplifies maintenance by allowing adjustable prestress levels to control fluid flow, enabling the valve to operate as either normally open or closed, thus controlling fluid passage effectively.
Implementation Method 1
The first elastic member is pressurized to be provided with a first prestress for elastic recovering. The second elastic member is pressurized to be provided with a second prestress for elastic recovering.
Data Source
AI summary
A fluid control valve with mechanical switch is a tube body having a seat portion in the through hole. A rod body passes through the bore of the seat portion, with two ends of the rod body provided with a block member and a valve plate, respectively. The rod body has an elastic member between the seat portion and the block portion, and another elastic member between the seat portion and the valve plate. The rod body further includes an adjustment member for adjusting the compression level of at least one elastic member, so as to adjust the prestress difference between the two elastic members, thereby adjusting the valve plate to normally open or close according to the movement of the rod body.