Interlocked Ground Rod Clamp for Safe Catenary Grounding
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Solution Overview
Problem
Fatal accidents occur during the installation of ground rods due to non-compliance with the sequential steps or inadequate grounding of the ground clamp, posing a risk to operators working on electrified railway catenaries.
Innovation Solution
A ground rod device with a detachable connection between the hook conductor element and the ground clamp element, featuring an interlocking module that ensures the hook conductor can only be released when the ground clamp is correctly installed on the rail, enforcing compliance with the installation procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the ground rod installation procedure is simplified or steps are skipped to improve operation speed, then productivity increases, but safety reliability deteriorates due to non-compliance with sequential grounding steps
Solution Approach 1:
The device employs a dynamic interlocking mechanism where the locking state of the hook conductor is automatically controlled by the clamping module's state. When the ground clamp is properly clamped to the rail, the interlocking module automatically unlocks to allow hook conductor installation. This dynamic coupling ensures procedural compliance without requiring manual verification or slowing down the installation process.
Solution Approach 2:
The system performs self-verification through the operational connection between the clamping module and interlocking module. The device automatically determines whether the ground clamp is properly installed and accordingly controls the release or retention of the hook conductor, eliminating the need for external supervision or complex control systems while ensuring safety compliance.
2Ease of operation
If the ground clamp is allowed to be installed without proper grounding verification to improve ease of operation, then ease of operation increases, but safety reliability deteriorates due to inadequate grounding
Solution Approach 1:
The device requires the ground clamp to be properly clamped to the rail as a preliminary action before the hook conductor can be released for installation. The interlocking module is designed to maintain the locked state until the clamping module achieves proper grounding contact, ensuring that grounding verification is automatically performed before allowing subsequent installation steps.
Solution Approach 2:
The interlocking module acts as an intermediary between the clamping module and the hook conductor element. It translates the mechanical state of the ground clamp into the appropriate locking or unlocking state, serving as a mediator that ensures grounding adequacy is verified before allowing the hook conductor to be installed, while maintaining operational simplicity.
3Reliability
If a detachable connection with interlocking mechanism is implemented to enforce safety procedures, then safety reliability improves, but device complexity increases due to additional modules and operational connections
Solution Approach 1:
The device merges the ground clamp and hook conductor element into a single integrated assembly with operational connection. The interlocking module and clamping module are combined within the ground clamp structure, sharing common components and mounting mechanisms. This merging reduces the number of separate devices and simplifies the overall system while maintaining the safety-enforcing interlocking functionality.
Solution Approach 2:
The ground clamp serves multiple functions: it provides mechanical clamping to the rail, houses the interlocking module for retention/release control, and integrates the mounting mechanism for the hook conductor element. The operational connection between modules allows a single device to enforce safety procedures while maintaining operational simplicity, reducing the need for separate safety verification devices.
Data Source
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AI summary
It is disclosed a ground rod device (2), comprised of a hook conductor element (4) for installation on a catenary and a ground clamp element (3) for attachment to a rail (1), in which the hook conductor element (4) is detachably connected to the ground clamp element (3). More particularly the ground clamp element (3) comprises an interlocking module adapted to provide retention, release and insertion of the hook conductor element (4) in the ground clamp element (3), and a clamping module configured to attach or detach the ground clamp element (3) to a rail (1). Both modules of the ground clamp element (3) are operationally connected in such a way that the operation of the clamping module to attach or to detach the ground clamp element (3) from a rail (1) triggers the interlocking module to release or retain the hook conductor element (4) on the ground clamp element (3).