Flowmeter Connection Insert for Turbulent Low-Flow Measurement
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Solution Overview
Problem
Existing flow measurement devices, particularly clamp-on flow meters, suffer from inaccuracies at low flow velocities and volumes due to laminar flow profiles, which limit the bandwidth of measurable flow velocities and volumes.
Innovation Solution
A device with a flow-influencing element integrated into the connections of a flow path, transitioning fluid flow from laminar to turbulent upstream of the measurement area, ensuring a consistent turbulent flow profile for improved measurement accuracy across a wide range of flow velocities and viscosities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If clamp-on flow meters are used for flow measurements, then the device can be attached externally to the line without interrupting flow, but measurement accuracy deteriorates at low flow velocities due to laminar flow profiles
Solution Approach 1:
The device is divided into three functional segments: a first connection for fluid entry, a measuring area for flow measurement, and a second connection for fluid exit. The flow-influencing element is integrated into the first connection, creating distinct functional zones that allow external attachment while ensuring turbulent flow in the measurement area for improved accuracy at low flow velocities
Solution Approach 2:
The flow-influencing element is positioned upstream of the measuring area to pre-condition the fluid flow before it reaches the measurement zone. This preliminary action converts laminar flow to turbulent flow in advance, ensuring that the flow profile entering the measuring area is already optimized for accurate measurement across a wide range of flow velocities
2Measurement precision
If flow-influencing element is integrated into the connection, then measurement accuracy is improved across wide bandwidth of flow velocities, but device complexity increases
Solution Approach 1:
The flow-influencing element is merged with the first connection to form an integrated structure. This combination eliminates the need for separate components and assembly steps, reducing manufacturing complexity while maintaining the dual function of fluid entry and flow conditioning. The integral design ensures consistent positioning and reduces potential alignment issues
3Measurement precision
If flow-influencing element is spaced upstream from measuring area, then turbulent flow is achieved in measurement area, but device length increases
Solution Approach 1:
The first connection serves multiple functions: it provides the fluid entry point, houses the flow-influencing element for flow conditioning, and structures the turbulent flow before it reaches the measuring area. This multi-functionality allows the device to achieve turbulent flow in the measurement area without requiring additional length, as the connection itself is designed to perform all these functions in sequence
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
Enhances measurement accuracy by ensuring turbulent flow in the measurement area, improving the bandwidth of measurable flow velocities and volumes, reducing signal noise, and maintaining accuracy at low flow rates.
Implementation Method 1
the flow-influencing element is designed such that the fluid flowing into the device via the first connection, which flows into the device with a substantially laminar flow, has a substantially turbulent flow in the measuring area
Data Source
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AI summary
The invention relates to a device (10) for arranging on a fluid-conducting line and for attaching a flowmeter, in particular an ultrasonic flowmeter, for detecting a measurement variable of the fluid being conducted by the line, having: - a first and a second connection (12, 14), by means of which the device (10) can be connected to the fluid-conducting line, - a measurement region (16) which is arranged between the first connection (12) and the second connection (14) and which can be coupled to the flowmeter in order to detect the measurement variable, wherein the first connection (12), the measurement region (16), and the second connection (14) define a flow path (A) for the fluid through the device (10), and - a flow-influencing element (22) which is arranged in and/or on the flow path (A) and which is arranged in front of the measurement region (16) in a provided flow direction of the fluid along the flow path (A) and at a distance therefrom. The flow-influencing element (22) is integrally formed with the first connection (12) or the second connection (14), and the flow-influencing element (22) is designed such that the flow flowing into the device (10) via the first connection (12), said fluid flowing into the device (10) with a substantially laminar flow, has a substantially turbulent flow in the measurement region (16).