Pipeline Test Fitting with Inclined Recess for Leak-Resistant Sealing
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Solution Overview
Problem
Current pressure testing and cleanout fittings for pipelines are cumbersome, prone to leakage, and often require complex seals that weaken the fitting, making them unsuitable for repeated use and weight-bearing applications.
Innovation Solution
A combined pressure-testing and cleanout fitting with a T-shaped design featuring a recess with inclined walls, a dual valve assembly, and O-ring seals, allowing for easy insertion and removal of a pressure testing device and providing multiple fluid flow options while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a large opening is provided in the cleanout fitting for pressure testing, then the pressure testing device can be inserted, but the fitting strength is significantly weakened causing deformation and leakage
Solution Approach 1:
The invention divides the opening into two separate openings: a first opening for pressure testing and a second opening for cleanout operations. This segmentation allows each opening to be optimized for its specific function, with the first opening being smaller and positioned to minimize structural weakening while still accommodating the pressure testing device.
Solution Approach 2:
The invention applies different qualities to different parts of the fitting by providing specialized sealing mechanisms (seal members) at specific locations. The seal members are positioned to provide localized sealing where needed, allowing the first opening to be smaller without compromising the overall sealing effectiveness or structural integrity of the fitting.
2Reliability
If complex seals are used to prevent leakage, then sealing effectiveness is improved, but the fitting becomes more prone to deformation and leakage under repeated use
Solution Approach 1:
The sealing system is segmented into multiple seal members positioned at different locations within the fitting. This segmentation distributes the sealing function across multiple simpler components rather than relying on a single complex seal, reducing the stress on any one seal and improving overall durability under repeated use.
Solution Approach 2:
The invention introduces seal members as intermediary elements between the pressure testing device and the fitting walls. These seal members act as mediators that accommodate minor misalignments and wear, maintaining effective sealing without requiring the fitting itself to be overly complex or rigid.
3Adaptability or versatility
If the pressure testing device is inserted through the same opening as the cleanout fitting, then space is saved, but the opening must be large which weakens the fitting structure
Solution Approach 1:
The invention segments the single opening into two separate openings (first and second openings), allowing each to be optimized for its specific function. The first opening is sized appropriately for pressure testing without being excessively large, while the second opening provides access for cleanout operations, thereby maintaining structural integrity while preserving versatility.
Solution Approach 2:
The invention resolves the spatial conflict by positioning the two openings at different locations on the fitting (different dimensions/space), rather than forcing both functions through a single opening. This dimensional separation allows both functions to coexist without compromising structural strength.
Data Source
AI summary
A sealing device is provided for use with a fitting. The fitting has circular port and a flow path with a longitudinal axis. A circular port encircles a portion of the flow path opposite the port with the sealing device inserted into the port. The sealing device has a circular top with two opposing surfaces depending therefrom but inclined so the surfaces are closer at the top. A continuous sidewall joins the periphery of the two surfaces. The opposing surfaces are inclined and spaced apart further at the top than at an end opposite the top. A cylindrical hole through the opposing surfaces encircles the flow path during use.