Bi-rigid guide wire enables endoscope insertion into winding small gas pipelines

This paper presents a method to inspect the interior of a winding small gas pipe using a hollow guide wire. There is no conventional method to insert an endoscope into an 8-bend 25-mm-diameter gas pipe within 2 hours. In medical practice, a guide wire inserted in advance enables insertion of a cathe...

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Autores principales:	Satoshi MIURA, Takayuki NAKAGAMI, Victor PARQUE, Tomoyuki MIYASHITA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	pipeline inspection infrastructure gas pipe optimization Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/d8b9b93d451e4fe19b351057038c4060
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spelling	oai:doaj.org-article:d8b9b93d451e4fe19b351057038c40602021-11-29T05:59:27ZBi-rigid guide wire enables endoscope insertion into winding small gas pipelines2187-974510.1299/mej.20-00088https://doaj.org/article/d8b9b93d451e4fe19b351057038c40602020-06-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/4/7_20-00088/_pdf/-char/enhttps://doaj.org/toc/2187-9745This paper presents a method to inspect the interior of a winding small gas pipe using a hollow guide wire. There is no conventional method to insert an endoscope into an 8-bend 25-mm-diameter gas pipe within 2 hours. In medical practice, a guide wire inserted in advance enables insertion of a catheter into a vessel. However, it is impossible to insert a normal guide wire into a gas pipe because the wire buckles in the pipe. Thus, we designed a hollow guide wire with a small front diameter and large rear diameter, making the front soft and the rear stiff. This guide wire can be inserted without buckling or meandering. First, we measured mechanical properties such as the torsional spring constant and damping coefficient of the wire and the frictional coefficient between the pipe and wire. Second, we conducted an experiment inserting guide wires with various tip pitches, front lengths, front outer diameters, and rear outer diameters. Third, we analyzed the insertion distance by simulating guide wire insertion using the Lagrange method, and optimized the guide wire shape via the response surface method. Finally, the optimized guide wires were tested experimentally to validate the analysis. As a result, an optimized guide wire and an endoscope can both be inserted into a gas pipe and removed within just 3 minutes.Satoshi MIURATakayuki NAKAGAMIVictor PARQUETomoyuki MIYASHITAThe Japan Society of Mechanical Engineersarticlepipelineinspectioninfrastructuregas pipeoptimizationMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 4, Pp 20-00088-20-00088 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	pipeline inspection infrastructure gas pipe optimization Mechanical engineering and machinery TJ1-1570
spellingShingle	pipeline inspection infrastructure gas pipe optimization Mechanical engineering and machinery TJ1-1570 Satoshi MIURA Takayuki NAKAGAMI Victor PARQUE Tomoyuki MIYASHITA Bi-rigid guide wire enables endoscope insertion into winding small gas pipelines
description	This paper presents a method to inspect the interior of a winding small gas pipe using a hollow guide wire. There is no conventional method to insert an endoscope into an 8-bend 25-mm-diameter gas pipe within 2 hours. In medical practice, a guide wire inserted in advance enables insertion of a catheter into a vessel. However, it is impossible to insert a normal guide wire into a gas pipe because the wire buckles in the pipe. Thus, we designed a hollow guide wire with a small front diameter and large rear diameter, making the front soft and the rear stiff. This guide wire can be inserted without buckling or meandering. First, we measured mechanical properties such as the torsional spring constant and damping coefficient of the wire and the frictional coefficient between the pipe and wire. Second, we conducted an experiment inserting guide wires with various tip pitches, front lengths, front outer diameters, and rear outer diameters. Third, we analyzed the insertion distance by simulating guide wire insertion using the Lagrange method, and optimized the guide wire shape via the response surface method. Finally, the optimized guide wires were tested experimentally to validate the analysis. As a result, an optimized guide wire and an endoscope can both be inserted into a gas pipe and removed within just 3 minutes.
format	article
author	Satoshi MIURA Takayuki NAKAGAMI Victor PARQUE Tomoyuki MIYASHITA
author_facet	Satoshi MIURA Takayuki NAKAGAMI Victor PARQUE Tomoyuki MIYASHITA
author_sort	Satoshi MIURA
title	Bi-rigid guide wire enables endoscope insertion into winding small gas pipelines
title_short	Bi-rigid guide wire enables endoscope insertion into winding small gas pipelines
title_full	Bi-rigid guide wire enables endoscope insertion into winding small gas pipelines
title_fullStr	Bi-rigid guide wire enables endoscope insertion into winding small gas pipelines
title_full_unstemmed	Bi-rigid guide wire enables endoscope insertion into winding small gas pipelines
title_sort	bi-rigid guide wire enables endoscope insertion into winding small gas pipelines
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/d8b9b93d451e4fe19b351057038c4060
work_keys_str_mv	AT satoshimiura birigidguidewireenablesendoscopeinsertionintowindingsmallgaspipelines AT takayukinakagami birigidguidewireenablesendoscopeinsertionintowindingsmallgaspipelines AT victorparque birigidguidewireenablesendoscopeinsertionintowindingsmallgaspipelines AT tomoyukimiyashita birigidguidewireenablesendoscopeinsertionintowindingsmallgaspipelines
_version_	1718407614952374272

Bi-rigid guide wire enables endoscope insertion into winding small gas pipelines

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