Sealant-Filled Micro-Cable Air Blowing Deformation
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Solution Overview
Problem
Micro-cables deform during the air blowing process of being laid into sub-pipes, causing damage due to pressure differences and potential bursting from air entering through micropores in the outer sheath.
Innovation Solution
A micro-cable design with a cable core comprising a central strengthening member, optical units twisted around it, and twisting gaps filled with a sealant that bonds with the optical units and outer sheath, preventing pressure differences and maintaining structural integrity under air pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the micro-cable is blown into the sub-pipe by compressed air, then the construction process is simplified and construction costs are saved, but the micro-cable deforms and damages due to pressure difference
Solution Approach 1:
The sealant is injected into the twisting gaps between optical units before the air blowing process. This preliminary sealing action prevents air from entering the cable core during the subsequent air blowing operation, eliminating the pressure difference that causes deformation and damage to the micro-cable.
2Device complexity
If there are gaps between optical units, then the cable structure is simpler, but pressure difference causes deformation and potential bursting
Solution Approach 1:
The sealant acts as an intermediary material that fills the twisting gaps between optical units. This intermediary substance eliminates the gaps that would otherwise allow air penetration, thereby preventing pressure difference-induced deformation and bursting while maintaining cable integrity.
Solution Approach 2:
The cable core is constructed as a composite structure combining optical units with sealant material. This composite construction fills the gaps between optical units, creating a sealed structure that resists pressure difference during air blowing operations.
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 sealant-filled micro-cable design minimizes deformation and prevents bursting by maintaining air tightness and balancing forces inside and outside the outer sheath, reducing damage during the laying process.
Implementation Method 1
the sealant bonds with the optical units, the outer sheath, and other parts without leaving gaps in the area enclosed by the outer sheath
Implementation Method 2
the sealant is able to bear large pressure after being cured, and is able to maintain a balance of force inside and outside the outer sheath when the micro-cable is laid by air blowing
Data Source
AI summary
A micro-cable, a manufacturing method therefor, and a filling device, which relate to the technical field of micro-cables, the micro-cable being used for transmitting signals. The micro-cable comprises a cable core and an outer sheath covering the peripheral surface of the cable core, wherein the cable core comprises a central strengthening member, a plurality of optical units and a sealant, with the plurality of optical units being twisted around the central strengthening member, and twisting gaps between the plurality of optical units being filled with the sealant. Further provided is a method for manufacturing the micro-cable. The filling device comprises a sealant-injection and stranding mold, a sealant injection valve, a sealant pump, and an air source, wherein the sealant-injection and stranding mold is internally provided with a filling channel and a sealant injection channel.