Double-Walled High-Pressure Pipe Sensor for Fluid Detection

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Solution Overview

Problem

Current high-pressure lines lack suitable sensors to detect fluid parameters, and existing sensors are not designed to withstand the high pressures required in industrial processes, leading to frequent component replacement and safety concerns.

Innovation Solution

A high-pressure sensor system comprising a double-walled tube structure with a work-hardened inner tube and an outer tube, where the inner tube is seated firmly within the outer tube using a force-fit connection, allowing for the integration of signal lines and sensors that can withstand pressures exceeding 15,000 bar, and a method for manufacturing this system using a drawing die to ensure a stable and frictional connection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional sensors are used in high-pressure pipelines, then sensor functionality is provided, but the sensors cannot withstand the high pressures exceeding 15,000 bar required in industrial processes

Engineering Contradiction:
Improvepressure resistanceVSAvoidsensor functionality
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The sensor is nested within the double-walled tube structure, with the inner tube containing the sensor and the outer tube providing additional pressure resistance. This nested configuration allows the sensor to function while being protected by the robust double-walled structure capable of withstanding pressures exceeding 15,000 bar.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The double-walled tube structure combines two tubes with different functional properties - the inner tube provides sensor integration and the outer tube provides enhanced pressure resistance. This composite structure enables both sensor functionality and high pressure resistance to coexist.

Inventive Principle:
Principle #40Composite materials

2Loss of information

If sensors are integrated into high-pressure pipelines, then fluid parameter detection is enabled, but the structural integrity and safety of the pipeline system may be compromised

Engineering Contradiction:
Improvefluid parameter detectionVSAvoidstructural integrity
Core Design Contradiction:
Loss of informationVSStrength

Solution Approach 1:

The sensor is nested within the inner tube in a groove, allowing fluid parameter detection without compromising the outer tube's structural integrity. The double-walled structure maintains safety while enabling monitoring functionality.

Inventive Principle:
Principle #7Nested doll (Nesting)

3Strength

If a double-walled tube structure is used to enhance pressure resistance, then pressure strength is improved, but device complexity increases

Engineering Contradiction:
Improvepressure resistanceVSAvoidstructure complexity
Core Design Contradiction:
StrengthVSDevice complexity

Solution Approach 1:

The pressure-resistant structure is segmented into two separate tubes - an inner tube for sensor integration and an outer tube for enhanced pressure resistance. This segmentation allows each component to be optimized for its specific function while maintaining overall system manageability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The inner tube is nested within the outer tube, creating a compact double-walled structure. This nested configuration provides enhanced pressure resistance without excessive complexity, as the two tubes work together as an integrated pressure-containing system.

Inventive Principle:
Principle #7Nested doll (Nesting)

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

The solution provides a stable and durable sensor system capable of detecting fluid parameters under extreme pressures, reducing the frequency of component replacement and enhancing safety by ensuring the sensor's structural integrity and accuracy.

Implementation Method 1

the inner tube and the outer tube are drawn together through a first drawing die... ensuring a stable and frictional connection

Methodology Applied
Scientific EffectFriction: Friction

Implementation Method 2

a tool diameter of the inner tool surface of the first drawing die is selected such that the inner diameter of the outer tube is reduced by the drawing process

Methodology Applied
Scientific EffectPlasticity: Plasticity

Data Source

PatentEP3391007B1Sensor for high pressure pipe and its fabrication method
Publication Date: 2023.04.26 ALLEIMA GMBH
  • EP3391007B1 patent drawingFigure 1
  • EP3391007B1 patent drawingFigure 2
  • EP3391007B1 patent drawingFigure 3

AI summary

The invention relates to a sensor for a high-pressure line and to a method for producing same. The aim of the invention is to provide a sensor for a high-pressure line, said sensor being suitable for detecting parameters or properties of a fluid conducted in a high-pressure line, wherein the sensor maintains the high pressure of the fluid. According to the invention, this is achieved by a sensor for a high-pressure line, comprising an outer tube which is made of metal and comprises an outer surface, an inner surface, an outer diameter, and an inner diameter, and an inner tube which is made of metal and comprises an outer surface, an inner surface, an outer diameter, and an inner diameter, said inner tube extending concentrically in the outer tube such that the inner tube and the outer tube together form a tube. The total wall thickness of the tube, measured as half of the difference between the outer diameter of the outer tube and the inner diameter of the inner tube, equals or is greater than the inner diameter of the inner tube. The sensor also comprises at least one groove which extends in the outer surface of the outer tube or in the outer surface of the inner tube in a longitudinal direction of the tube, at least one signal line arranged in the groove, and at least one receiver which is connected to the signal line, said receiver being arranged at least in the groove or in at least one recess which is introduced at least into the outer surface of the inner tube or into the inner surface of the outer tube in addition to the at least one groove. The outer tube sits on the inner tube in a force-fitting manner.