Pipe Isolation Seals Using Sliding Heads for Pressure Control
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Solution Overview
Problem
Existing pipe isolation devices are complex and prone to failure due to the use of pivoting arms, and they struggle to accommodate a wide range of pipe sizes and pressurized fluids.
Innovation Solution
A simplified pipe isolation device with a first and second sealing head, capable of achieving multiple seals within a pipe, utilizing sliding engagements to position the sealing heads and a bleed port to manage pressure, allowing for safe isolation and maintenance of pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pivoting arms are used in pipe isolation devices, then the device can accommodate different pipe sizes and positions, but the device complexity increases and reliability decreases due to potential failure points
Solution Approach 1:
The patent removes the pivoting arm mechanism entirely from the pipe isolation device. Instead of using complex mechanical arms that pivot to accommodate different pipe sizes, the invention uses a simplified sealing head that can be positioned and secured directly against the pipe surface, eliminating the problematic moving parts while maintaining adaptability through direct positioning methods.
Solution Approach 2:
The sealing head is divided into distinct functional segments including the sealing element, positioning features, and securing mechanisms. This segmentation allows each component to perform its specific function independently, simplifying the overall structure while maintaining the ability to accommodate various pipe sizes through modular adjustment of these segments.
2Ease of operation
If pivoting arms are used in pipe isolation devices, then the device can adjust to different positions, but the reliability worsens due to points of potential failure
Solution Approach 1:
The patent extracts and eliminates the pivoting arm mechanism that creates failure points. The redesigned device achieves position adjustment through alternative means that do not involve complex mechanical joints, thereby removing the primary source of potential failures while maintaining operational flexibility.
Solution Approach 2:
The invention employs simpler, more robust components that can be easily replaced if needed, rather than relying on complex pivoting mechanisms that are prone to wear and failure. The sealing head and associated components are designed to be straightforward mechanical elements with fewer moving parts, reducing reliability concerns.
3Device complexity
If a simplified sealing head design is used, then the device complexity reduces, but the ability to accommodate wide range of pipe sizes may be limited
Solution Approach 1:
The sealing head incorporates localized adaptive features such as adjustable sealing elements, variable positioning mechanisms, and configurable securing methods that allow the simplified structure to adapt to different pipe sizes. Rather than making the entire device complex, only specific local components have the adjustability needed to accommodate various pipe dimensions.
Solution Approach 2:
The simplified sealing head design includes dynamic elements that allow it to adapt to different pipe sizes through controlled movement or adjustment of specific components. This enables the overall simple structure to achieve versatility through localized dynamic adjustments rather than complex mechanical systems throughout.
Data Source
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AI summary
A pipe isolation device and method of using the same. The pipe isolation device includes a control bar head, a first sealing head, and a second sealing head. The first sealing head has a first seal element and a first sliding engagement. The first sliding engagement permits the first sealing head to slide relative to the control bar head along a first fixed path and traverse a right angle to gain access to an interior space of a pipe. The second sealing head has a second seal element and a second sliding engagement. The second sliding engagement permits the second sliding head to slide relative to the first sealing head along a second fixed path and traverse the right angle to gain access to an interior space of the pipe. A first seal element and a second seal element are disposed on the sealing heads and have axially-offset configurations.