Leak Testing Apparatus for Tube-Plate Connections
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional leak testing methods for connections between tubes and plates are cumbersome and impractical, especially in industrial settings with many pipes penetrating a plate in a small area, making it difficult to detect and repair leaks efficiently.
Innovation Solution
A leak testing apparatus with a housing, piston, and seals that creates a small pressure chamber around the tube-plate interface, allowing for quick and reliable detection of leaks using pressurized media, and can be automated with a robot for efficient testing of multiple connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional leak testing methods are used, then leaks can be detected, but the testing process is cumbersome and impractical
Solution Approach 1:
The testing apparatus is divided into distinct functional segments: a housing that engages the plate, a piston that inserts into the tube, seals that create isolation, and channels for pressurized medium. This segmentation allows each component to perform its specific function efficiently, making the overall testing process simpler and more reliable than conventional methods.
Solution Approach 2:
The piston acts as an intermediary element that bridges the housing and the tube interior. It transmits the pressurized medium from the housing into the tube while maintaining sealing, enabling indirect testing of the tube-plate connection without direct access to the connection point itself.
2Quantity of substance
If pipes are arranged closely together, then heat exchange area is sufficient, but it becomes difficult to detect which pipe is leaking
Solution Approach 1:
Each pipe is tested independently by inserting a dedicated piston into each tube, creating isolated testing zones. This segmentation allows precise identification of which specific pipe is leaking, even when pipes are densely arranged, because each test is confined to a single tube-housing-seal system.
Solution Approach 2:
The apparatus applies testing conditions locally to each individual pipe connection rather than testing the entire plate assembly globally. The pressurized medium is introduced into each tube separately, and leaks are detected at the specific local connection point, enabling precise localization of defects in densely packed pipe arrangements.
3Ease of repair
If repair access is provided for leaking pipes, then leaks can be repaired, but the process becomes cumbersome
Solution Approach 1:
The apparatus performs preliminary identification and localization of leaks through precise pressure testing of each individual pipe connection. By accurately determining which specific pipe is leaking before repair begins, the system eliminates the time-consuming process of searching for and accessing the correct pipe, allowing repair personnel to proceed directly to the identified defect location.
4Reliability
If a pressure chamber is created around the tube-plate interface, then leak detection becomes reliable, but the space required adjacent to the pipe increases
Solution Approach 1:
The piston is inserted into the interior of the tube itself, and the sealing elements are positioned within the tube-bore and at the tube-plate interface. This nesting arrangement creates the pressure chamber using the existing tube interior space rather than requiring additional external space, maintaining compact dimensions while achieving reliable leak detection.
Solution Approach 2:
The pressure chamber is formed by utilizing the longitudinal dimension of the tube interior rather than requiring increased radial or lateral space. The piston extends into the tube along its length, creating a confined volume for pressurized medium that leverages the existing tubular geometry, thus avoiding increases in the footprint area around the pipe.
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 rapid, safe, and reliable leak detection with minimal disruption to the surrounding structure, allowing for efficient testing of multiple connections in tight spaces and facilitating automated quality control.
Implementation Method 1
connecting the pressurised medium to a space, in use limited by the first seal, the plate material, the tube and the second seal
Data Source
AI summary
A leak testing apparatus is provided, for testing connections between tubes penetrating a plate material. A housing is disclosed having a central cylindrical longitudinal hollow. A piston arranged inside the housing, where a distal end of the piston in use is inserted into the tube. A seal arranged circumferentially on the piston, such that in use the second seal may be brought into sealing engagement with the tube. A second end of the housing is closed by an endcap where at least one channel is provided longitudinally in the piston and a connection to the channel allowing connection to a source of pressurized medium is provided, connecting the pressurized medium to a space, in use limited by the first seal, the plate material, the tube and the second seal, and optionally part of the piston and part of the housing.