Flow Measurement Guide Section for Dust-Resistant Diverting Sensors
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Solution Overview
Problem
Flow measurement devices, especially of the diverting type, face accuracy degradation and operational issues due to dust accumulation on detection elements and diverters, which affects the measurement of fluid flow rates.
Innovation Solution
Incorporating a guide section upstream of the diverter's inlet within the conduit, which directs fluid flow either towards the central or peripheral section, depending on the diverter's inlet location, to prevent dust from entering the diverter, thereby maintaining measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a diverter is used to divert fluid for measurement, then the device can measure large flow rates, but dust accumulates on the diverter and detection element causing measurement accuracy degradation
Solution Approach 1:
The guide section is positioned upstream of the diverter inlet to preliminarily direct the fluid flow before it reaches the diverter. This preliminary action redirects dust-laden flow away from the diverter inlet, preventing dust accumulation before it can occur on the measurement components.
Solution Approach 2:
The guide section acts as an intermediary component between the main conduit and the diverter inlet. It mediates the fluid flow by creating a directional guide that separates dust-containing flow from the cleaner flow that enters the diverter, protecting the measurement system from dust contamination.
2Object-affected harmful factors
If the diverter inlet is positioned at the peripheral section, then dust entry is reduced, but the guide section must direct fluid to the central section increasing structural complexity
Solution Approach 1:
The guide section is designed with an asymmetric configuration where the inlet is positioned at one location and the outlet at another, creating a non-uniform flow path. This asymmetric design naturally directs fluid from the peripheral inlet through the central guide section to the diverter, optimizing dust separation while maintaining structural efficiency.
Solution Approach 2:
The guide section employs curved surfaces and smooth transitions to guide fluid flow from the peripheral inlet to the central outlet. The curved geometry efficiently redirects flow direction without creating turbulence or dead zones, achieving effective dust separation with a relatively simple curved structure rather than complex angular components.
3Object-affected harmful factors
If the guide section directs fluid towards the central section, then dust is prevented from entering the diverter, but the flow path length increases affecting response time
Solution Approach 1:
The guide section is divided into multiple surface segments or zones that progressively redirect the fluid flow. Rather than a single long curved path, the segmented design creates a series of shorter directional changes that collectively achieve the same dust separation effect with a more compact overall flow path length.
Solution Approach 2:
The guide section utilizes three-dimensional spatial arrangement to redirect flow. By employing vertical or radial components in addition to horizontal guidance, the design achieves effective dust separation by directing flow in multiple dimensions simultaneously, reducing the overall path length compared to purely linear or planar guidance approaches.
Data Source
AI summary
The disclosed flow measurement structure used in a flow measurement device is provided with a conduit through which gas to be measured flows, and a diverter which diverts gas flowing through the conduit and conducts the diverted gas to a detection element for measuring the flow amount of said gas. An inlet of the diverter is provided in the periphery of the conduit. The conduit is provided with an inclined section which, provided upstream of the inlet, guides the gas towards the center of the conduit.