Non-Circular Coriolis Flow Tube for Lower Pressure Loss

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Solution Overview

Problem

Traditional Coriolis mass flowmeters with liquid contact parts made of special materials like Hastelloy for corrosive media are costly, heavy, and inefficient due to circular flow tube designs leading to unsmooth fluid streamlines and pressure loss.

Innovation Solution

The design incorporates a Coriolis mass flowmeter with non-circular sections at the flow tube ends, where the flow tube extends to connect with a flange sealing disc, simplifying the flange and flow divider design to only provide stiffness support, and using corrosion-resistant materials for the flow tube and flange sealing disc.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If traditional circular flow tube design is used, then manufacturing is simpler, but fluid streamline smoothness deteriorates and pressure loss increases

Engineering Contradiction:

Improveflow tube manufacturing simplicityVSAvoidpressure loss

Core Design Contradiction:

Ease of manufactureVSLoss of energy

Solution Approach 1:

The flow tube cross-section is changed from a traditional circular symmetric shape to a non-circular asymmetric shape. This asymmetric design optimizes fluid streamline smoothness and reduces pressure loss, directly resolving the technical contradiction between manufacturing simplicity and energy loss.

Inventive Principle:

Principle #4Asymmetry

2Reliability

If special materials like Hastelloy are used for liquid contact parts, then corrosion resistance is improved, but cost and weight increase

Engineering Contradiction:

Improvecorrosion resistanceVSAvoidflowmeter weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

Different materials are used for different parts of the flowmeter based on their functional requirements. The flow tube and flange sealing disc (liquid contact parts) use corrosion-resistant materials like Hastelloy, while non-liquid contact parts use lighter, less expensive materials. This local differentiation resolves the contradiction between corrosion resistance and weight.

Inventive Principle:

Principle #3Local quality

3Reliability

If special materials like Hastelloy are used for liquid contact parts, then corrosion resistance is improved, but manufacturing cost increases

Engineering Contradiction:

Improvecorrosion resistanceVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Corrosion-resistant materials are applied only to specific liquid contact parts (flow tube, flange sealing disc) rather than the entire flowmeter. This localized material selection maintains corrosion resistance where needed while significantly reducing overall manufacturing cost.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The flowmeter is segmented into liquid contact parts and non-liquid contact parts, with different material requirements for each segment. This segmentation allows selective use of expensive corrosion-resistant materials only where necessary, resolving the cost contradiction.

Inventive Principle:

Principle #1Segmentation

4Reliability

If flange and flow divider are designed as liquid contact parts, then sealing performance is improved, but weight and cost increase

Engineering Contradiction:

Improvesealing performanceVSAvoidflange weight

Core Design Contradiction:

ReliabilityVSWeight of stationary object

Solution Approach 1:

The sealing function is extracted from the traditional flange design and transferred to a dedicated flange sealing disc component. This allows the main flange to be made of lighter materials while the sealing disc, which requires corrosion resistance and sealing performance, is made of special materials like Hastelloy.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The flange sealing disc is designed with local quality characteristics, using corrosion-resistant materials specifically at the sealing surfaces that contact liquid, while other parts of the assembly can use lighter materials. This resolves the contradiction between sealing performance and weight.

Inventive Principle:

Principle #3Local quality

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 reduces production and manufacturing costs, improves fluid streamline smoothness, reduces pressure loss, and enhances measurement conditions while maintaining performance and functionality.

Implementation Method 1

Coriolis mass flowmeter

Methodology Applied

Scientific EffectCoriolis effect: Coriolis Force

Data Source

PatentUS20250067585A1Coriolis mass flowmeter with non-circular section

Publication Date: 2025.02.27 WALSN MEASUREMENT AND CONTROL TECHNOLOGY (HEBEI) CO LTD

AI summary

Some embodiments of the disclosure provide a Coriolis mass flowmeter with a non-circular section. In some examples, the mass flow meter includes a flow inlet device and a flow outlet device. The flow inlet device and the outlet device each include a flange connecting disc, a flange sealing disc, a connector, and a flow tube. The flange sealing disc is attached to the outer surface of the flange connecting disc. The connector is connected to the flange connecting disc. A body of the flow tube is located in the connector, and an outlet of the flow tube is connected to the flange sealing disc. The cross section of a measurement body of the flow tube is a circular cross section, and the cross section of the outlet of the flow tube is a non-circular cross section.