Pipeline Control Unit Gate Retention Under Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pipeline control structures face challenges in securely retaining and replacing gates under pressure without shutting down the line, as debris can limit sealing and allow fluid leakage in wedged configurations, and sliding seals may not provide tight engagement or allow for easy removal.
Innovation Solution
A pipeline control unit with a housing that uses flexible internal walls supported by a rigid strongback, where a traveling member is advanced by screws to compress and seal the gate, allowing for external tensioning to secure and release the gate, enabling fluid-tight engagement and easy removal without relying on sliding seals or wedging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wedged seal configuration is used to secure the gate, then the gate can be retained under pressure, but debris caught between the wedged surfaces can limit sealing completion and allow fluid escape
Solution Approach 1:
The patent extracts the gate from a traditional fixed housing and places it in a removable container that can be independently accessed. This separation allows the gate to be removed, replaced, or maintained without affecting the main pipeline system, eliminating the harmful effect of debris interference by enabling complete gate removal rather than attempting to seal around debris-contaminated surfaces.
Solution Approach 2:
The patent segments the pipeline control system into distinct components: the main pipeline, the housing, the container, and the gate. This segmentation allows each component to be independently addressed, particularly enabling the gate to be accessed and replaced without shutting down the entire line, thereby resolving the contradiction between maintaining pressure and ensuring reliable sealing.
2Reliability
If O-rings or soft sealing materials are used to seal between the gate and valve structure, then sealing can be achieved, but the structure does not allow tightening if a leak were to develop
Solution Approach 1:
The patent employs a dynamic sealing approach where the container can be compressed axially to enhance sealing pressure. The compression members allow the container to be tightened or loosened as needed, providing adjustability if leaks develop. This dynamic mechanism replaces static O-ring sealing with an actively adjustable compression system that can be modified during operation.
3Reliability
If traditional flange connections are used to secure the gate, then the gate can be retained, but the gate cannot be easily removed or replaced without shutting down the line
Solution Approach 1:
The patent segments the gate assembly into a removable container that houses the gate, rather than fixing the gate directly to the pipeline flanges. This segmentation enables the container with the gate to be independently removed and replaced without shutting down the main pipeline, significantly reducing maintenance downtime while maintaining reliable gate retention during operation.
Solution Approach 2:
The patent enables continuous operation of the pipeline by allowing gate replacement without shutdown. The compression members and removable container design facilitate quick gate changes while the pipeline remains pressurized and operational, eliminating the loss of time associated with traditional shutdown-based maintenance.
4Strength
If a rigid housing structure is used to support the gate, then structural strength is provided, but the structure cannot flex to accommodate tensioning and release mechanisms for easy gate removal
Solution Approach 1:
The patent applies local quality by making specific portions of the housing flexible while maintaining overall structural strength. The compression members are positioned to flex specific sections of the housing wall locally, allowing tensioning and release mechanisms to operate without compromising the overall structural integrity of the housing during pressurized operation.
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
Enables secure retention and easy replacement of gates under pressure without interrupting fluid flow, maintaining pipeline pressure during gate changes, and allowing for quick removal and installation of gates by releasing tension, thus enhancing operational efficiency and reducing maintenance downtime.
Implementation Method 1
flexible materials such as polyethylene (e.g., HDPE), PVC, composites, plastics, rubber and some metals for the seating structure along with a rigid outside frame (strongback) gives this improved method a structure that can support the pipeline control unit, withstand the pipeline pressure and provide internal walls that are flexible so when tension is applied by components adapted with the rigid frame the structure's walls can move inwards to restrain the gate in fluid tight engagement
Data Source
AI summary
A pipeline control unit that joins pipeline conduits and has a housing with an interior compartment for receiving a gate. A valve servicing assembly or pressure plates can be installed onto the housing to form a fluid tight structure to allow removal and replacement of a retained gate without depressurizing a pipeline system. Strongbacks attached to the housing can compress lateral walls of the housing to secure a gate in the interior compartment, and removal of such compression allows removal of the gate while the pipeline is pressurized.