Remote Access Pull Rig Fuse Opening Mechanism

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Solution Overview

Problem

Existing power distribution systems face challenges in remotely and controlledly opening fuses, especially in underground and pad-mounted applications, where fuses may move unexpectedly, interfering with the opening process.

Innovation Solution

A remote access pull rig is designed with a base, legs, and an adjustable arm, equipped with clamps and a rope funnel, allowing for secure attachment to the fuse and enabling controlled force application to open the fuse from a distance, preventing unexpected movement during the process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a remote access pull rig is used to open a fuse, then operator control and safety are improved, but device complexity increases

Engineering Contradiction:
Improveoperator controlVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The pull rig is divided into multiple independent components: a base structure, multiple legs with clamps, an adjustable arm with clamp, and a rope funnel. Each component performs a specific function (attachment, clamping, positioning, force application), allowing the operator to control the fuse opening process remotely while maintaining manageable device complexity through modular design

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The rope funnel acts as an intermediary mechanism between the operator's pulling action and the fuse. The rope passes through the funnel to redirect and control the force application, enabling remote operation while simplifying the interaction between the operator and the fuse mechanism

Inventive Principle:
Principle #24Intermediary (Mediator)

2Stability of the object's composition

If multiple clamps are used to secure the pull rig, then stability and control are improved, but device complexity increases

Engineering Contradiction:
ImprovestabilityVSAvoiddevice complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

Different clamps are positioned at specific locations on the pull rig (legs and arm) to provide localized securing points. Each clamp is designed to attach to specific structural elements of the fuse box, distributing the stabilization function across multiple strategic points rather than requiring a single complex anchoring mechanism

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The clamps are integrated directly into the leg and arm structures of the pull rig. The clamping mechanisms are combined with the structural members themselves rather than being separate attachments, reducing overall device complexity while maintaining multiple secure attachment points for enhanced stability

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentUS10504678B2Remote access pull rig
Publication Date: 2019.12.10 S&C ELECTRIC CO
  • US10504678B2 patent drawing
  • US10504678B2 patent drawing
  • US10504678B2 patent drawing

AI summary

A remote access pull rig for opening a fuse associated with a power distribution system is provided. The remote access pull rig includes a base adapted to be coupled to the fuse and a first leg coupled to the base. The first leg includes a first clamp. The remote access pull rig also includes a second leg coupled to the base. The first leg and the second leg extend along a longitudinal axis of the remote access pull rig, and the second leg including a second clamp. The remote access pull rig includes an arm coupled to the base. The arm extends along an axis transverse to the longitudinal axis and includes a third clamp.