Integrated Pressure Protection Valve With Blowout-Proof Stem Assembly
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Solution Overview
Problem
Conventional pressure protection valves have complex manufacturing, lack versatility, and are prone to overtravel and blowout failures due to unitary metal housings, making them difficult to assemble and unsuitable for various applications.
Innovation Solution
The pressure protection valve is designed with a separate valve body and base components, where the body is made of plastic (e.g., glass-filled nylon) and the base of metal (e.g., brass), allowing for versatile fluid connection configurations and integration of multiple fluid connections, with a valve stem mechanism that includes a hard stop and spring for overpressure protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a unitary metal housing is used for the pressure protection valve, then the structural strength and durability are improved, but the manufacturing complexity and assembly difficulty increase, and versatility for different applications is reduced
Solution Approach 1:
The valve housing is divided into two separate components: a valve body made of plastic material and a valve base made of metal material. These components are manufactured separately and then assembled together using threaded connections. This segmentation allows each component to be optimized for its specific function - the plastic body for versatility and ease of manufacturing, and the metal base for structural strength and durability.
2Stability of the object's composition
If a unitary metal housing is used for the pressure protection valve, then the structural integrity is maintained, but the versatility to accommodate multiple fluid connection configurations is reduced
Solution Approach 1:
The plastic valve body is designed with universal adaptability to accommodate multiple fluid connection configurations. Different connection types and arrangements can be integrated into the plastic body through molding, allowing the same basic valve design to serve multiple applications. The metal valve base provides the structural foundation while the plastic body offers configuration flexibility.
3Stress or pressure
If a unitary metal housing is used for the pressure protection valve, then the pressure containment capability is ensured, but the risk of overtravel and blowout failure increases
Solution Approach 1:
The design incorporates a spring mechanism that provides beforehand cushioning against overpressure conditions. The spring absorbs excess pressure energy and prevents sudden blowout failures by gradually releasing pressure. Additionally, the separated plastic body and metal base design with threaded connections allows for controlled deformation and pressure relief without catastrophic failure.
4Reliability
If a unitary metal housing is used for the pressure protection valve, then the pressure protection function is achieved, but the weight and cost increase
Solution Approach 1:
The valve housing uses a composite construction combining plastic and metal materials. The plastic valve body provides sufficient structural strength for pressure containment while being significantly lighter than metal. The metal valve base is used only where structural strength is critically needed, optimizing the weight-strength ratio. This composite approach maintains the pressure protection function while reducing overall valve weight.
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 design enhances versatility, reduces assembly complexity, and prevents overtravel and blowout failures, providing lighter and more cost-effective solutions with improved performance and hysteresis reduction.
Implementation Method 1
a spring located within the bore opposite from the sealing end of the valve stem relative to the valve seat, and the spring biases the valve stem toward the closed position
Data Source
AI summary
A pressure protection valve provides more versatility and improved performance over conventional configurations. The pressure protection valve includes a valve body made of a first material (e.g., plastic) and having multiple integrated fluid connections. A valve base made of a second material (e.g., metal) is connected to the valve body at an inlet portion. A valve stem moves within the valve body to open and close the valve. Fluid connections, therefore, are integrated into the valve body with any suitable number and configuration, which therefore is adaptable with any desired valve base configuration. The valve stem is insertable through the inlet portion of the valve body during assembly, which permits overpressure protection to be blowout-proof. An internal side surface of a valve seat of the valve base, and a valve bore of the valve body through which the valve stem moves, have matched diameters to reduce hysteresis effects.