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Title: Pipe crawler with extendable legs

Abstract

This invention is comprised of a pipe crawler for moving through a pipe in inchworm fashion having front and rear leg assemblies separated by air cylinders to increase and decrease the spacing. between assemblies. Each leg of the four legs of an assembly is moved between a wall-engaging, extended position and a retracted position by a separate air cylinder. The air cylinders of the leg assemblies are preferably arranged in pairs of oppositely directed cylinders with no pair laying in the same axial plane as another pair. Therefore, the cylinders can be as long as a leg assembly is wide and the crawler can crawl through sections of pipes where the diameter is twice that of other sections. The crawler carries a valving system, a manifold to distribute air supplied by a single umbilical air hose to the various air cylinders in a sequence controlled electrically by a controller. The crawler also utilizes a rolling mechanism, casters in this case, to reduce friction between the crawler and pipe wall thereby further extending the range of the pipe crawler.

Inventors:
Publication Date:
Research Org.:
Westinghouse Savannah River Co., Aiken, SC (United States)
Sponsoring Org.:
DOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6716014
Alternate Identifier(s):
OSTI ID: 6716014; Legacy ID: DE93008223
Patent Number(s):
PATENTS-US-A7679497
Application Number:
ON: DE93008223; PPN: US 7-679497
Assignee:
Dept. of Energy TIC; EDB-93-048161
DOE Contract Number:  
AC09-89SR18035
Resource Type:
Patent Application
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 03 NATURAL GAS; 02 PETROLEUM; 20 FOSSIL-FUELED POWER PLANTS; PIPES; INSPECTION; CYLINDRICAL CONFIGURATION; DESIGN; DIMENSIONS; INVENTIONS; MOTION; PIPELINES; REMOTE SENSING; VALVES; CONFIGURATION; CONTROL EQUIPMENT; EQUIPMENT; FLOW REGULATORS 420200* -- Engineering-- Facilities, Equipment, & Techniques; 032000 -- Natural Gas-- Transport, Handling, & Storage; 022000 -- Petroleum-- Transport, Handling, & Storage; 200104 -- Fossil-Fueled Power Plants-- Components

Citation Formats

Zollinger, W.T. Pipe crawler with extendable legs. United States: N. p., 1991. Web.
Zollinger, W.T. Pipe crawler with extendable legs. United States.
Zollinger, W.T. Tue . "Pipe crawler with extendable legs". United States.
@article{osti_6716014,
title = {Pipe crawler with extendable legs},
author = {Zollinger, W.T.},
abstractNote = {This invention is comprised of a pipe crawler for moving through a pipe in inchworm fashion having front and rear leg assemblies separated by air cylinders to increase and decrease the spacing. between assemblies. Each leg of the four legs of an assembly is moved between a wall-engaging, extended position and a retracted position by a separate air cylinder. The air cylinders of the leg assemblies are preferably arranged in pairs of oppositely directed cylinders with no pair laying in the same axial plane as another pair. Therefore, the cylinders can be as long as a leg assembly is wide and the crawler can crawl through sections of pipes where the diameter is twice that of other sections. The crawler carries a valving system, a manifold to distribute air supplied by a single umbilical air hose to the various air cylinders in a sequence controlled electrically by a controller. The crawler also utilizes a rolling mechanism, casters in this case, to reduce friction between the crawler and pipe wall thereby further extending the range of the pipe crawler.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {4}
}