Sorbent Tube Apparatus Pressure Equalization
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Solution Overview
Problem
Sorbent tubes used in high-pressure fluid-flow systems are prone to uncontrolled decompression and shattering due to pressure differences, leading to costly replacements and safety hazards.
Innovation Solution
A sorbent tube apparatus with a pressurizable housing that allows pressure equalization between the sorbent tube and the fluid chamber, minimizing the risk of decompression by mounting the sorbent tube to allow fluid communication and using a housing that is openable for easy access and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sorbent tube is used in a high-pressure fluid-flow system, then trace analyte measurement is enabled, but the glass tube is prone to uncontrolled decompression and shattering due to pressure differences
Solution Approach 1:
A pressure-equalisation chamber is introduced as an intermediary component between the high-pressure fluid system and the sorbent tube. This chamber allows pressure to be equalised across the tube walls before sampling, preventing decompression and shattering while maintaining the tube's analytical function
Solution Approach 2:
The apparatus is divided into distinct functional segments: a pressure-equalisation chamber, a sorbent tube mounting section, and a fluid sampling section. This segmentation allows the pressure management function to be separated from the analytical function, enabling the fragile sorbent tube to operate in a protected pressure environment
2Stability of the object's composition
If the sorbent tube is rigidly mounted in the housing, then positioning stability is improved, but the tube becomes more prone to damage from collisions and pressure stress
Solution Approach 1:
A flexible membrane or diaphragm is used to mount the sorbent tube, allowing the tube to be held in position while accommodating pressure changes and mechanical stress. The flexible mounting isolates the fragile tube from rigid structural stresses while maintaining its functional positioning
3Reliability
If the housing is sealed and pressurizable, then pressure equalization is achieved, but assembly and replacement of the sorbent tube becomes difficult
Solution Approach 1:
The housing is segmented into a removable cover section and a main body, allowing the sorbent tube to be accessed and replaced without opening the entire pressurizable housing. This segmented design maintains pressure integrity while facilitating easy maintenance
Solution Approach 2:
The sorbent tube is extracted as a separate, independently replaceable component that can be removed through a designated access point in the housing, eliminating the need to disassemble the entire pressure-containing structure for tube replacement
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 effectively reduces the risk of sorbent tube failure and facilitates safe, cost-effective analysis by allowing pressure equalization and easy maintenance, reducing the need for frequent replacements and ensuring user safety.
Implementation Method 1
By allowing fluid communication between the inside of a sorbent tube and a sealed chamber enclosing the sorbent tube, it is possible to equalise the internal and external pressures to the sorbent tube
Data Source
AI summary
A sorbent tube apparatus (10) for high-pressure fluid sample analysis, the sorbent tube apparatus (10) comprising a pressurisable housing (32) having first and second fluid ports (48a, 48b) and defining a fluid chamber (34) therein; and a sorbent tube (12) mountable within the pressurisable housing (32), the sorbent tube (12) extending from one of the first and second fluid ports (48a) and spaced apart from the other of the first and second fluid ports (48b) to be in fluid communication with the fluid chamber (34), thereby enabling in use pressure equalisation between the sorbent tube (12) and fluid chamber (34). A method of analysing high-pressure fluid, an analytic probe apparatus, a further sorbent tube apparatus and method of preventing or limiting damage to a sorbent tube during high-pressure fluid sampling are also provided.