Grounding Clamp Lock-Out Requiring Hot-Stick Operation
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Solution Overview
Problem
Conventional grounding clamps can be installed and removed by hand, posing a risk of electrocution as they do not require the use of an insulating tool, leading to safety incidents and fatalities in high-voltage environments.
Innovation Solution
A locking mechanism is introduced for grounding clamps that can only be actuated or unlocked with an insulating tool, such as a hot-stick, using a safety lock-out system that includes a clutch mechanism to prevent manual operation, ensuring the clamp is only operated with proper safety protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional grounding clamps are designed to be manually operable, then ease of operation is improved, but safety is worsened due to risk of electrocution in high-voltage environments
Solution Approach 1:
The patent introduces an insulating tool as an intermediary device between the operator and the grounding clamp. The lock-out mechanism requires the insulating tool to actuate the clamp, preventing direct hand operation. This intermediary ensures that operators maintain safe distance from energized conductors while still being able to operate the clamp when proper safety equipment is used.
Solution Approach 2:
The lock-out mechanism implements preliminary anti-action by preventing the harmful action (manual operation near energized conductors) before it can occur. The clamp is designed with a locked state that must be deliberately unlocked using the insulating tool, creating a preventive barrier against unsafe operation rather than relying on operator awareness alone.
2Object-affected harmful factors
If a lock-out mechanism is added to prevent manual operation, then safety is improved, but device complexity is worsened
Solution Approach 1:
The lock-out mechanism is merged with the existing clamp structure rather than being a separate added system. The locking components are integrated into the jaw assembly and actuator mechanism, combining the safety function with the operational mechanism. This integration reduces overall system complexity compared to adding a completely separate locking system.
Solution Approach 2:
The lock-out mechanism is designed to be self-enforcing through spring-loaded locking components that automatically engage and disengage based on the position of the actuator. The system uses its own operational movements to control the locking state, eliminating the need for external control systems or additional actuators to manage the safety lock.
3Object-affected harmful factors
If the clamp requires an insulating tool for operation, then safety is improved, but ease of operation is worsened due to additional equipment requirements
Solution Approach 1:
The mechanism transitions from a static locked state to a dynamic unlocked state through the application of force via the insulating tool. The spring-loaded components allow the clamp to adapt its locking state based on operational needs, being firmly locked during storage and transport but easily unlocked when the insulating tool is applied, providing flexibility without compromising safety.
Data Source
AI summary
A grounding clamp includes a safety lock-out which locks the operation of the clamp in the absence of a cooperating hot-stick. The lock-out employs a clutch which prevents the translation of the clamping members relative to one another until the clutch is disengaged. The cooperating hot-stick is required for the disengagement of the clutch.