Insertion Valve Gasket Structure for Leak-Resistant Pipe Capture
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Solution Overview
Problem
Existing insertion valves experience leaks and damage due to pipe movement and pressure, exacerbated by the configuration of casings and gaskets, particularly in pressurized pipe systems, leading to separation of bell and spigot joints and increased bending forces.
Innovation Solution
The insertion valve design incorporates a monolithic bridge and interlocking gasket with a reduced lay-length, featuring a trunk bore, annular seal, and wedge seal components to securely capture and seal the pipe ends, reducing prying forces and enhancing sealing capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the valve is designed with traditional monolithic bridges and extended casings to capture pipe ends, then the pipe capturing capability is improved, but the prying forces increase and cause leaks and separation of bell and spigot joints
Solution Approach 1:
The gasket is divided into multiple segments (first gasket segment, second gasket segment, third gasket segment) that can independently deform and seal against different surfaces. This segmentation allows the gasket to adapt to pipe movement and pressure changes without transmitting excessive prying forces to the bell and spigot joints, thereby preventing leaks and separation while maintaining effective pipe capturing capability.
2Stability of the object's composition
If the valve body is designed with extended casings to prevent pipe movement, then the pipe stability is improved, but the bending forces increase and tend to separate the opposed casings
Solution Approach 1:
The gasket material and its deformation characteristics are utilized to absorb and accommodate pipe movement within acceptable parameters. The segmented gasket design allows for controlled deformation that maintains pipe stability while preventing the transmission of excessive bending forces to the casings, thereby avoiding separation and structural damage.
3Reliability
If a single large gasket is used to seal the valve body, then the sealing capacity is improved, but the manufacturing complexity and challenges increase
Solution Approach 1:
The gasket is divided into multiple manageable segments that can be manufactured separately using standard molding processes. Each segment is smaller and easier to manufacture with consistent quality control, yet when assembled together they provide comprehensive sealing coverage throughout the valve body, maintaining high sealing capacity while significantly improving ease of manufacture.
4Adaptability or versatility
If the valve is designed with traditional configuration to capture pipe ends, then the pipe end capture is improved, but the leaks at bell and spigot joints increase due to pipe movement and pressure
Solution Approach 1:
The segmented gasket design introduces dynamic flexibility to the sealing system. Each gasket segment can independently deform and adapt to pipe movement and pressure changes, maintaining reliable seals at the bell and spigot joints while preserving effective pipe end capture capability. This dynamic response prevents leaks without compromising the valve's ability to secure the pipe ends.
Data Source
AI summary
An insertion valve comprises a first casing comprising a trunk bore defining a diameter, a second casing opposite the first casing, and a boss within the first casing and extending beyond the diameter of the trunk bore. In various aspects, the insertion valve can comprise a casing comprising a sleeve surrounding a trunk bore and a monolithic bridge directly coupled to the sleeve. Interlocking gasket can further comprise an annular seal component comprising a first notch diametrically opposed from a second notch and a wedge seal component comprising a first head coupled to the first notch and a second head coupled to the second notch.