Horizontal Woltman Meter Flow Conditioning Ribs
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Solution Overview
Problem
Existing Woltman meters face issues with irregular flow profiles due to installation components like bends and valves, suboptimal sealing, and misalignment, leading to reduced measuring accuracy and potential damage from high flow rates.
Innovation Solution
Incorporating radially arranged longitudinal ribs in cavities between the liquid inlet, measuring insert, and outlet, and using dual O-rings for enhanced sealing and secure positioning of the measuring insert, along with additional O-rings in the upper bearing for improved sealing and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bends, diameter changes, and valves are installed in the liquid line, then the liquid meter can be installed in existing pipelines, but irregular flow is created in the measuring insert area reducing measurement accuracy
Solution Approach 1:
The housing is divided into multiple cavities (first cavity, second cavity, measuring cavity) separated by partition walls. The longitudinal ribs are strategically positioned in specific cavities to create flow conditioning zones that isolate the measuring insert from turbulent flow effects caused by upstream components like bends and valves.
Solution Approach 2:
Longitudinal ribs are introduced as intermediary flow conditioning elements between the liquid inlet and the measuring insert. These ribs act as flow straighteners that convert irregular flow patterns into uniform, unidirectional flow before the liquid reaches the measuring insert, thereby eliminating the negative impact of upstream pipeline components.
2Device complexity
If only one sealing ring is used in the front area of the measuring insert, then the device structure is simple, but the sealing effect is insufficient and the holder may be damaged by water impingement at high flow rates
Solution Approach 1:
Different sealing configurations are applied to different locations of the measuring insert. Two sealing rings are installed on the front side (flow-facing side) to handle high-flow conditions, while one sealing ring is sufficient on the rear side. This localized differentiation optimizes sealing reliability where it is most needed without unnecessarily complicating the overall structure.
3Device complexity
If only one O-ring is used between the upper bearing and housing cover, then the structure is simple, but the tightness and alignment of the regulating paddle are insufficient
Solution Approach 1:
Two O-rings are installed in the upper bearing area where precise alignment and sealing are critical for regulating paddle operation. This enhanced sealing configuration ensures proper tightness and alignment in the bearing region, while other areas of the device maintain simpler sealing structures.
4Strength
If the connection between support plate and rear support is rigid, then structural strength is high, but misalignment between front and rear portions occurs affecting measurement accuracy
Solution Approach 1:
The connection between the support plate and rear support is designed with adjustable or flexible characteristics that allow for alignment compensation. This dynamic connection capability enables the device to maintain proper alignment between front and rear portions during installation and operation, ensuring measurement accuracy while still providing sufficient structural strength.
Data Source
Figure 1~2
Figure 3~4
AI summary
The device has longitudinal ribs (8) radially arranged in a hollow space between a fluid inlet and a measuring insert and/or in a hollow space between the measuring insert and a fluid outlet. The ribs are integral components of a housing (1a), and are arranged about 90 degrees to each other. The measuring insert has sealing rings (10) i.e. O-rings, at two sides of the inserts, respectively, where the sides are turned away from and face flow of a fluid, respectively. The O-rings are arranged in a region of a bearing of the insert.