Front-Insert Flow Conditioner for Accurate Ultrasonic Metering
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Solution Overview
Problem
Ultrasonic gas flow meters are sensitive to flow turbulence and require a long upstream straight pipe for accurate measurement, making installation and modification in confined spaces challenging.
Innovation Solution
A flow conditioner apparatus with a front-insert assembly, featuring a flange, thread, or welding connection, is designed to fit within the process pipe with a smaller outer diameter, providing a uniform and symmetrical flow profile while occupying minimal space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a long upstream straight pipe is used to reduce flow turbulence, then measurement accuracy is improved, but installation space requirements increase
Solution Approach 1:
The flow conditioner is divided into multiple modular sections that can be inserted into the pipe in segments. Each segment contains flow straightening elements, allowing the long flow conditioning function to be achieved through multiple smaller components rather than a single long pipe section, thus reducing the overall space requirement while maintaining measurement accuracy
Solution Approach 2:
The flow conditioner components are nested within the existing pipe structure. The flow conditioning elements are inserted inside the pipe diameter, utilizing the internal space of the pipe rather than requiring additional external space, thereby achieving flow straightening without increasing the installation footprint
2Reliability
If traditional flow conditioners are installed to reduce turbulence, then measurement reliability is improved, but ease of installation deteriorates due to confined spaces
Solution Approach 1:
The flow conditioner incorporates adjustable and reconfigurable elements that can be dynamically positioned during installation. The modular segments can be assembled and disassembled, allowing installation teams to adapt to confined spaces and complex pipe configurations, thereby improving ease of installation while maintaining the flow conditioning function for reliable measurements
Solution Approach 2:
Connection adapters and mounting interfaces act as intermediaries between the flow conditioner components and the existing pipe system. These intermediary elements facilitate easy installation and removal without requiring permanent modifications to the pipe, enabling straightforward installation in confined spaces while ensuring proper flow conditioning for reliable measurement
3Measurement precision
If existing pipe configurations are modified to accommodate flow conditioners, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The flow conditioner is designed to create its own mounting structure within the existing pipe using standard connection methods such as flanges, threads, or welding at the pipe ends. The device serves itself by utilizing the pipe's existing geometry and standard connection interfaces, eliminating the need for complex custom modifications to the pipe configuration while achieving accurate flow conditioning
Data Source
Figure 1A~1B
Figure 1C~2A
Figure 2B~2C
AI summary
A flow conditioner apparatus and a method of assembling the flow conditioner apparatus can include a flow conditioner configured for insertion with a process pipe with respect to an ultrasonic flow meter, wherein the flow conditioner is characterized by an outer diameter smaller than the inner diameter of the process pipe, and a front insert assembly comprising a flange, thread, or welding connection, wherein the front insert assembly is configured to securely fix the flow conditioner within the process pipe. The flow conditioner can be configured to provide a uniform and symmetrical flow profile within the process pipe. The flow conditioner can further include a construction suitable for limited installation space.