Thermosensitive Cable Protective Sleeve With Fire Warning and Suppression

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Solution Overview

Problem

Existing protective sleeves for high-voltage cables and wires lack effective fire-extinguishing measures and fail to alert nearby individuals in case of a fire, leading to potential large losses and safety risks.

Innovation Solution

A reversible thermosensitive early-warning environment-friendly flame-retardant protective sleeve is designed with a flame-retardant layer, expansion blocks, and a trip protection circuit that includes a silicon controlled rectifier and loudspeaker to detect and respond to fires by extruding sandstone particles for extinguishing and sounding an alarm.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing protective sleeves use external fireproof materials, then fireproof protection function is provided, but fire-extinguishing capability is insufficient and early warning is not generated

Engineering Contradiction:

Improvefireproof protection effectVSAvoidfire hazard risk

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The protective sleeve pre-loads sandstone particles and sharp blocks in a ready-to-extrude configuration. When temperature reaches the triggering threshold, the thermosensitive material immediately extrudes the sharp blocks to pierce the fire-retardant bag and release sandstone particles for fire suppression, eliminating the need for external fire-extinguishing equipment.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent converts the harmful effect of heat into a beneficial trigger mechanism. The thermosensitive material utilizes temperature increase from fire to automatically activate the fire-extinguishing function by extruding sharp blocks that pierce the fire-retardant bag, transforming the harmful thermal energy into a protective response.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Reliability

If existing protective sleeves provide fireproof protection, then cable protection is improved, but early warning capability to alert nearby people is lacking

Engineering Contradiction:

Improvecable fireproof protectionVSAvoidfire warning information

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The protective sleeve incorporates a feedback mechanism through the alarm device that detects fire conditions and provides immediate warning to nearby personnel. When the thermosensitive material detects temperature increase, it simultaneously triggers the alarm to sound, creating a closed-loop feedback system that informs users of the fire hazard.

Inventive Principle:

Principle #23Feedback

3Device complexity

If existing protective sleeves lack active fire response, then device complexity is reduced, but fire-extinguishing capability and safety are insufficient

Engineering Contradiction:

Improveprotective sleeve structureVSAvoidfire damage loss

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent merges multiple functions into a single integrated protective sleeve structure: fireproof protection through the fire-retardant bag, active fire-extinguishing through sandstone particle extrusion, and early warning through the alarm device. This combination provides comprehensive fire protection without requiring separate external systems.

Inventive Principle:

Principle #5Merging (Combining)

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

The solution effectively extinguishes fires by expanding to release sandstone particles and alerts nearby individuals through an alarm, preventing the spread of fire and minimizing damage.

Implementation Method 1

Expansion blocks are each mounted on a surface of a corresponding one of the first splicing block and the second splicing block

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Implementation Method 2

reversible thermosensitive early-warning environment-friendly flame-retardant protective sleeve

Methodology Applied

Scientific EffectThermosensitivity: Thermal Expansion

Data Source

PatentUS12176691B2Reversible thermosensitive early-warning environment-friendly flame-retardant protective sleeve

Publication Date: 2024.12.24 ANHUI EFARAD ELECTRIC POWER TECH

AI summary

A reversible thermosensitive early-warning environment-friendly flame-retardant protective sleeve is provided, which includes an outer protective sleeve. A cushioning mounting block is mounted on one side of the outer protective sleeve. A flame-retardant layer is provided on a surface of the cushioning mounting block. A first splicing block and a second splicing block are mounted on an inner wall of the outer protective sleeve. Expansion blocks are mounted on surfaces of both the first splicing block and the second splicing block. A sharp block is mounted at a bottom of each of the expansion blocks. A flame-retardant device is provided at a bottom of the sharp block.