Insert Valve Cut Warning Using Magnetic Shell Cutter Position Sensing

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Solution Overview

Problem

Existing cut warning systems for insert valves on pipelines are prone to operator error due to indirect measurement methods for limiting the travel of shell cutters, leading to potential damage to the valve sleeve and subsequent sealing issues.

Innovation Solution

A cut warning system that includes a signaling element within the valve sleeve cavity to detect the axial position of the shell cutter, producing a signal when it reaches a post-engagement position, thereby preventing over-travel and ensuring accurate cutting without damaging the valve sleeve.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If indirect measurement methods are used to monitor shell cutter position, then device complexity is reduced, but measurement precision deteriorates leading to operator error

Engineering Contradiction:

Improvemonitoring system complexityVSAvoidshell cutter position measurement

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

A magnetic field intermediary is introduced between the shell cutter and the sensor. The shell cutter contains a magnetic material, and a magnetic sensor detects its position through the valve sleeve wall without direct contact. This intermediary magnetic field allows precise position monitoring while keeping the system simple and non-intrusive.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces mechanical measurement systems (such as physical contact sensors or direct mechanical linkages) with a magnetic field-based detection system. This substitution eliminates complex mechanical components while achieving precise position measurement through non-contact sensing.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If drilling machine travel range is increased to accommodate varying pipeline diameters, then adaptability improves, but reliability deteriorates due to potential over-travel and valve sleeve damage

Engineering Contradiction:

Improvedrilling machine adaptabilityVSAvoidvalve sleeve integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements a feedback system where a magnetic sensor continuously monitors the shell cutter's axial position and provides real-time data to the drilling machine controller. When the cutter reaches a predetermined safe position near the valve sleeve, the system automatically alerts the operator or stops advancement, preventing over-travel and damage while allowing full adaptability for different pipeline sizes.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system pre-establishes a safe stopping position for the shell cutter relative to the valve sleeve before cutting begins. By detecting the cutter's position in advance and providing warning signals before it reaches the critical zone, the system prevents damage while maintaining the drilling machine's ability to handle various pipeline diameters.

Inventive Principle:

Principle #10Preliminary action

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 system effectively prevents shell cutter over-travel, reducing damage to the valve sleeve and ensuring a proper seal for the valve plug, thereby enhancing the reliability and efficiency of pipeline cutting operations.

Implementation Method 1

a signaling element positioned in communication with the cavity, the signaling element configured to detect at least one axial position of the shell cutter within the cavity

Methodology Applied

Scientific EffectPosition detection:

Data Source

PatentUS11549628B1Insert valve cut warning system

Publication Date: 2023.01.10 MUELLER INT LLC

AI summary

A cut warning system can include a valve sleeve defining a cavity, the valve sleeve defining a bottom sealing surface within the cavity; a pipeline extending through the cavity; a drilling machine including a shell cutter, the shell cutter defining a bottom edge, the drilling machine configured to axially advance the shell cutter from a pre-engagement position towards the bottom sealing surface, the pipeline positioned between the shell cutter and the bottom sealing surface in the pre-engagement position; and a signaling element positioned within the cavity, the signaling element configured to produce a signal when the shell cutter reaches a post-engagement position, the bottom edge being axially positioned between the pipeline and the bottom sealing surface.