Ballast Sample Confinement Tool with Hydraulic Jaw Actuation
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Solution Overview
Problem
Traditional methods for collecting ballast samples in railway transportation systems often disturb the surrounding material and expose samples to contamination due to their design, which is not suited for the unique consistency of ballast, lacking the natural cohesion found in soils and rocks.
Innovation Solution
A sample confinement tool with jaw-like members that can be driven into the ballast, mechanically compressing and then decompressing to secure and release a ballast sample, utilizing a hydraulic actuator and attached to a heavy-duty vehicle for efficient extraction and containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional hand digging methods are used to collect ballast samples, then sample collection can be performed with simple equipment, but the surrounding ballast is disturbed and samples are exposed to contamination
Solution Approach 1:
The sampling system is divided into distinct functional segments: the confinement tool with jaw members for sample extraction, the driving tool for insertion, and the sample receptacle for collection. This segmentation allows each component to perform its specific function efficiently while protecting the sample from contamination throughout the process.
Solution Approach 2:
The confinement tool acts as an intermediary device between the ballast mass and the sample receptacle. It mechanically compresses and confines the ballast sample within its structure during extraction, preventing contamination from surrounding ballast while transporting the sample to the receptacle.
2Manufacturing precision
If mechanical compression is applied to confine the ballast sample, then sample uniformity and containment are improved, but the device complexity increases
Solution Approach 1:
The jaw members are designed to be movable rather than fixed, allowing them to rotate between open and closed positions. This dynamic configuration enables the same structure to perform multiple functions: allowing the tool to be driven into the ballast with jaws open for sample collection, then closing to compress and confine the sample during extraction, reducing the need for complex additional confinement structures.
Solution Approach 2:
The mechanical compression is achieved by changing the spatial parameter of the jaw members from an open configuration to a closed configuration through rotation. This parameter change transforms the volume and pressure applied to the ballast sample, confining it uniformly without requiring complex compression mechanisms.
3Manufacturing precision
If a hollow square tube structure is used for the sample confinement tool, then sample collection depth and area are controlled, but the time required for sample extraction increases
Solution Approach 1:
A vibrating tool is coupled to the confinement tool during the driving operation. The vibration facilitates rapid insertion of the confinement tool into the ballast at the predetermined depth, significantly reducing the time required for sample extraction while maintaining the precise depth and area control provided by the hollow square tube structure.
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
Improves sample uniformity, reduces contamination and disturbance, enhances operator safety, and decreases the time required for sample extraction by providing controlled depth and area collection.
Implementation Method 1
A sample confinement tool includes a hydraulic actuator that is operable to rotate the second steel member in a first direction relative to the first steel member to mechanically compress the ballast sample and/or rotate the second steel member in a second direction relative to the first steel member to mechanically decompress the ballast sample
Implementation Method 2
Inserting the sample confinement tool the predetermined depth below the ballast surface may include vibrating, using the driving tool, the sample confinement tool until the second end of the sample confinement tool reaches the predetermined depth below the ballast surface
Data Source
AI summary
A sample confinement tool includes a first end and a second end. The first end of the sample confinement tool is coupled to a driving tool. The driving tool is coupled to a heavy-duty vehicle. The sample confinement tool is operable to insert a predetermined depth below a ballast surface and collect a ballast sample within the second end of the sample confinement tool. The sample confinement tool is also operable to confine the ballast sample within the second end of the sample confinement tool by mechanically compressing the ballast sample. The sample confinement tool is further operable to release the ballast sample into a sample receptacle by mechanically decompressing the ballast sample.