Sealed Pipeline Inspection System with Automatic Positioning
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Solution Overview
Problem
Existing pipeline inspection systems require multiple operators and cannot be used under sealed conditions, particularly for high-pressure gas pipelines, posing safety risks and inefficiencies.
Innovation Solution
A pipeline inspection system that allows single-operator control from a safe distance, using an elongate flexible guide member and a first conduit for sealed insertion, with an automatic positioning system that deploys and retracts without manual manipulation, inhibiting gas escape and enabling precise camera movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional snake and camera system is used for pipeline inspection, then the inspection can be performed, but multiple operators are required and the system cannot be used under sealed conditions for high-pressure gas pipelines
Solution Approach 1:
The camera head is nested within the positioning system, which in turn is nested within the entry tube. This nested configuration allows the entire inspection system to be inserted through a sealed opening in the high-pressure gas pipeline, eliminating the need to open the pipeline and enabling single-operator control from a safe distance.
Solution Approach 2:
The entry tube acts as an intermediary device that bridges the sealed pipeline opening and the inspection apparatus. It provides a sealed passage through which the camera and positioning system can be inserted without compromising the seal, allowing remote operation while maintaining pipeline integrity.
2Ease of operation
If manual manipulation of the positioning system is required during camera insertion and retraction, then the positioning can be controlled, but the process becomes more complex and requires operator proximity to the pipeline opening
Solution Approach 1:
The positioning system transitions from a static configuration during storage to a dynamic deployed state during inspection. The arms automatically extend outward when the camera enters the pipeline and retract when pulled back, providing adaptive positioning without manual intervention. This dynamic behavior simplifies operation while the automated mechanism handles the complexity.
Solution Approach 2:
The positioning system is self-actuating through the movement of the camera head itself. As the camera is pushed into or pulled from the pipeline, the positioning arms automatically deploy or retract based on the camera's position, eliminating the need for separate actuation mechanisms or manual control during insertion and retraction.
3Object-affected harmful factors
If the camera is inserted through an opening in the pipeline prior to sealing, then the inspection can proceed, but gas escape occurs and safety risks increase for high-pressure pipelines
Solution Approach 1:
The entry tube is inserted into the pipeline opening and sealed in place before the camera and positioning system are introduced. This preliminary sealing action prevents gas escape during the entire inspection process, including insertion and retraction operations. The sealed passage is established in advance, eliminating the need to open the pipeline for inspection activities.
Data Source
AI summary
An inspection system configured for “no-blow” use in a pressurized gas pipeline includes a push rod wound around a spool for convenient deployment and portability. A camera disposed on one end of the push rod is configured to relay images back to a monitor. A motor is configured for remote actuation by an operator, and provides for self-propelled movement of the camera in the pipeline. An entry tube is configured for sealed entry into the pipeline to facilitate entry of the camera and push rod. A guide shoe at the end of the entry tube provides a smooth transition for the camera and push rod as it leaves the entry tube and enters the pipeline. An automatically deployable and retractable positioning system is used to keep the camera away from an interior surface of the pipeline, and in the case of smaller pipelines, centers the camera within the pipeline.