Pressure Relief Housing Vent With Detachable Protective Membrane
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Solution Overview
Problem
Existing pressure relief devices in explosion-proof housings face issues with membrane detachment due to external impacts and pressure differences, leading to potential damage or rupture, and require frequent replacement, which complicates maintenance and operation.
Innovation Solution
A pressure relief device featuring a porous gas-permeable body with a membrane attached in a manner that provides strong adhesion during normal operation but releases at moderate pressure differences, ensuring the membrane protects the device from external stresses and allows gas flow during explosions while preventing flame escape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the membrane is attached to the porous body with a cuff and held on a nozzle, then the membrane can be replaced after rupture, but the membrane may detach due to external impacts or pressure differences, leading to frequent replacement and complex maintenance
Solution Approach 1:
The invention extracts the membrane from its traditional removable cuff-based mounting and integrates it directly onto the porous body through coating or lamination. This extraction of the membrane from the removable assembly eliminates the need for frequent replacement while maintaining protection functions, thereby improving reliability without significantly increasing maintenance complexity.
Solution Approach 2:
The membrane is merged with the porous body by attaching it directly to the surface, creating a combined structure where the membrane and porous body function as an integrated unit. This merging eliminates the separate cuff and nozzle components, reducing maintenance complexity while ensuring stable attachment and improving reliability.
2Ease of repair
If the membrane is made removable with a cuff for replacement, then damaged membranes can be exchanged, but unintended removal can occur and the structure becomes more complex
Solution Approach 1:
The invention extracts the membrane from the removable cuff assembly and integrates it directly onto the porous body. This extraction eliminates the cuff and nozzle components, simplifying the overall structure while maintaining the ability to repair or replace the membrane if needed, thus reducing device complexity without compromising ease of repair.
Solution Approach 2:
The membrane is applied as a thin film or coating directly on the porous body, creating a simple yet effective structure. This approach uses the flexibility of thin films to provide protection while avoiding complex mechanical fastening systems, thereby reducing device complexity while maintaining ease of repair through direct application or replacement of the film.
3Object-affected harmful factors
If the membrane covers the pores to protect from dust and moisture, then protection is improved, but the membrane may rip or be damaged by external influences
Solution Approach 1:
The membrane is merged with the porous body through direct attachment, creating a unified structure where the membrane benefits from the structural support of the porous body. This merging enhances the membrane's resistance to external stress and damage while maintaining its protective function against dust and moisture, thereby improving strength without compromising protection.
Solution Approach 2:
The invention creates a composite structure by combining the membrane with the porous body, where the membrane provides protection against dust and moisture while the porous body provides structural strength and support. This composite approach enhances the overall strength and damage resistance of the protective layer while maintaining its filtering function.
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 ensures the membrane remains attached during normal operation but detaches at appropriate pressure differences, facilitating gas flow while maintaining protection against external impacts and moisture, thus enhancing the reliability and longevity of the pressure relief mechanism.
Implementation Method 1
a porous body that is gas-permeable, but blocks the breakthrough of flames or glowing particles due to the narrowness and length of pores extending therethrough
Implementation Method 2
a membrane attached to the porous gas-permeable body in a manner being in abutment against the porous gas-permeable body
Data Source
AI summary
A pressure relief device including a gas-permeable body to which a membrane adheres that is preferably impermeable to moisture. The membrane can be a rubber membrane that is formed by applying liquid rubber to the pressure relief body and, optionally, a component which supports the liquid rubber and surrounds the pressure relief body.