Volumetric Sample Adjustment Assembly for Liquid Pipelines
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Solution Overview
Problem
Existing samplers require time-consuming and costly manual disassembly to adjust sample volume under process line pressure, disrupting the sampling process, especially in pipelines with frequent product switching.
Innovation Solution
A volumetric sample adjustment assembly that allows rapid changes in sample volume without removing the sampler from the process line or disassembling the collection head, using a removable pin for gross adjustments and an O-ring mechanism for fine adjustments, enabling operation within a predetermined range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual disassembly of the sample head assembly is performed to adjust sample volume, then the sample volume can be adjusted, but the process requires removal from process line and process pressure, causing time loss and operational disruption
Solution Approach 1:
The adjustment mechanism is segmented into modular components: a sample head assembly that remains installed in the process line and an external adjustment assembly that can be operated independently. The sample head includes a sample chamber, piston, and seals, while the adjustment assembly includes an adjustment member accessible from outside the process line. This segmentation allows volume adjustment without removing the sampler from the process line or relieving process pressure.
Solution Approach 2:
An external adjustment assembly acts as an intermediary between the operator and the sample head assembly. The adjustment member extends through the sample head assembly to the external environment, allowing the operator to adjust sample volume from outside the pressurized process line. This intermediary mechanism transmits adjustment forces and motions without requiring direct access to internal components under pressure.
2Adaptability or versatility
If manual disassembly is required to adjust sample volume, then volume changes can be made, but the complexity and cost of the adjustment process increases
Solution Approach 1:
The adjustment mechanism employs dynamic, movable components rather than fixed configurations. The adjustment member can be moved along the stroke direction to change sample volume, and the sample head assembly can be partially disassembled and reassembled without removal from the process line. This dynamic design allows flexible volume adjustment while maintaining operational simplicity.
3Ease of manufacture
If the sampler is removed from the process line for adjustment, then manual disassembly can be performed, but productivity and operational continuity are reduced
Solution Approach 1:
The adjustment member is pre-positioned and accessible from the external environment, allowing adjustments to be made before any disruption to sampling operations occurs. The design anticipates the need for adjustment and provides ready access to the adjustment mechanism without requiring removal from the process line, thereby maintaining continuous sampling productivity.
Data Source
AI summary
A volumetric sample adjustment assembly located outside of a process line to facilitate rapid changes in the sample volume without having to remove the sampler from the process line, from process pressure or without having to manually disassemble the collection head assembly, like some prior art devices. The volumetric sample adjustment assembly has a “gross adjustment” assembly to vary the gross sample volume within the predetermined range. This gross adjustment assembly uses a removable pin to vary the sample size. This removable adjustment pin may be removed and replaced in different positions to change the gross volume of the sample on short notice and without having to remove the sampler from the process line, from process pressure or without having to manually disassemble the collection head assembly.