Pipe Joint Watertight Testing Using Tapered Seal Compression
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Solution Overview
Problem
Conventional watertight testing devices face issues with sealing performance due to thin water-stop bags being easily damaged and thicker ones being less deformable, leading to reduced sealing efficiency between pipe joint parts.
Innovation Solution
A watertight testing device with a cylindrical core, annular seal members, pressing members, and a moving device that compresses and engages seal members into tapered insertion spaces, ensuring effective sealing and easy movement within pipe joints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the water-stop bags are made thin, then they are easier to deform and expand for sealing, but they are easily damaged and holed during handling
Solution Approach 1:
The water-stop bag is divided into multiple layers (first water-stop bag layer, second water-stop bag layer, and optionally third layer) with different functions. The inner layers provide sealing deformability while the outer layer provides damage resistance, resolving the contradiction between thinness for deformation and thickness for durability.
Solution Approach 2:
The water-stop bag uses composite material structure with at least two different materials (e.g., inner layer of flexible material like rubber or silicone, outer layer of protective material). This composite structure combines the advantages of different materials to achieve both deformability and damage resistance.
2Reliability
If the water-stop bags are made thick, then they are more resistant to damage, but they are less likely to be deformed and expanded for sealing
Solution Approach 1:
The water-stop bag is divided into multiple layers (first water-stop bag layer, second water-stop bag layer, and optionally third layer) with different functions. The inner layers provide sealing deformability while the outer layer provides damage resistance, resolving the contradiction between thinness for deformation and thickness for durability.
Solution Approach 2:
The water-stop bag uses composite material structure with at least two different materials (e.g., inner layer of flexible material like rubber or silicone, outer layer of protective material). This composite structure combines the advantages of different materials to achieve both deformability and damage resistance.
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
The device improves sealing performance by compressing seal members into tapered spaces, providing secure sealing between the core and pipes, and facilitates easy testing and removal with omni wheels for enhanced mobility.
Implementation Method 1
a first pressing member for pressing and compressing the first seal member into a first seal-member insertion space
Implementation Method 2
the compressed first seal member provides sealing between the outer surface of the core and the inner surface of the one pipe
Data Source
AI summary
A watertight testing device includes a cylindrical core fit into a pipe joint part, a first seal member for sealing between the outer surface of the core and the inner surface of one pipe, a second seal member for sealing between the outer surface of the core and the inner surface of the other pipe, a first pressing member for pressing and compressing the first seal member into a first seal-member insertion space, a second pressing member for pressing and compressing the second seal member into a second seal-member insertion space, a moving device for moving the first and second pressing members in a pipe axial direction, and a test fluid feeder for feeding a test fluid into a test space.