Gas Meter Shielding Plate for Uniform Flow Distribution
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Solution Overview
Problem
Existing gas meters face challenges in accurately measuring high flow rates due to uneven gas flow distribution, which affects measurement precision.
Innovation Solution
A gas meter design featuring a meter body with a shielding plate that spreads the gas flow into an internal space before it enters the measurement flow path, ensuring stable flow velocity and accurate measurement, utilizing a flow rate measurer connected to the meter inlet, shielding plate, and meter outlet in a linear configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gas flows directly from meter inlet into measurement flow path, then device complexity is reduced, but measurement precision deteriorates due to uneven flow distribution
Solution Approach 1:
A shielding plate is introduced as an intermediary component between the meter inlet and the measurement flow path. This plate spreads the incoming gas flow to create a predetermined internal space, ensuring uniform flow distribution before measurement without requiring complex flow conditioning structures.
Solution Approach 2:
The shielding plate performs preliminary flow conditioning by spreading the gas flow before it enters the measurement flow path. This preliminary action ensures that the flow is evenly distributed, which improves measurement accuracy without adding complex real-time control mechanisms.
2Measurement precision
If shielding plate is added to spread gas flow, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The shielding plate serves as a simple intermediary component that effectively conditions the gas flow. By placing this single plate at a predetermined distance from the inlet, the patent achieves flow uniformity without requiring multiple complex flow conditioning devices.
Solution Approach 2:
The shielding plate creates a localized flow spreading zone within the meter body. This local intervention ensures uniform flow distribution specifically at the measurement section, improving precision without making the entire device complex.
3Measurement precision
If flow velocity is not stably distributed, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The shielding plate performs preliminary flow stabilization by spreading the gas flow before it reaches the measurement section. This ensures that the flow velocity is stably distributed, which is essential for accurate flow rate measurement using ultrasonic waves.
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
This design stabilizes gas flow velocity, enhancing the accuracy of flow rate measurement and enabling the measurement of high flow rates, such as 10 to 30 cubic meters per hour, while maintaining a compact size and cost-effectiveness.
Implementation Method 1
flow rate measurer 3 is configured to use a propagation time of ultrasonic waves
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3~4
AI summary
A gas meter includes meter body (11a) that has internal space (19), meter inlet (12) into which a fluid flows, meter outlet (16) from which the fluid flows out, and shielding plate (13) that is located with a predetermined distance from an opening portion of meter inlet (12). In addition, the gas meter includes flow rate measurer (14) that measures a flow rate of the fluid, and connection member (15) that connects outlet (20b) of flow rate measurer (14) and meter outlet (16) to each other. Furthermore, meter inlet (12), shielding plate (13), flow rate measurer (14), connection member (15), and meter outlet (16) are linearly located in this order.