Elastic Conduit Sealing for Variable Cable Diameters
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Solution Overview
Problem
Conventional conduit waterproof equipment fails to effectively seal underground cables due to manufacturing errors in outer diameter size, leading to either incomplete insertion or gaps that compromise waterproof and fire-blocking capabilities.
Innovation Solution
A conduit sealing system with an adaptable selector that measures the outer diameter of underground cables and selects a suitable adaptor, combined with a body and press plates made of elastic material for tight sealing, ensuring proper fit and pressure application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed-size insertion hole is used in conduit waterproof equipment, then the device structure is simple, but manufacturing errors in cable outer diameter cause either incomplete insertion or gaps that compromise waterproof performance
Solution Approach 1:
The adaptor is designed with elastic material and can be dynamically adjusted through compression by press plates. The adaptor changes its inner diameter from a larger relaxed state to a compressed state that tightly fits the cable, allowing the same adaptor to accommodate cables within a range of diameters while maintaining waterproof sealing.
Solution Approach 2:
The system changes the physical parameter of the adaptor (inner diameter) by applying mechanical compression. The elastic adaptor material allows the inner diameter to be reduced under compression, creating a tight fit around cables of varying diameters and ensuring waterproof sealing without requiring multiple fixed-size adaptors.
2Reliability
If separate conduit waterproof equipment is provided for each cable diameter, then waterproof performance is improved, but the device complexity and number of components increase
Solution Approach 1:
The elastic adaptor with adjustable inner diameter serves multiple functions: it can accommodate cables of different diameters within a specified range, maintain waterproof sealing, and provide fire blocking. This single adaptable component replaces the need for multiple fixed-size waterproof devices for different cable diameters.
Solution Approach 2:
The adaptor transitions from a static fixed-size hole to a dynamic adjustable opening that can change its diameter through compression. This dynamic capability allows one adaptor to universally fit multiple cable sizes while maintaining reliable waterproof and fire-blocking performance.
3Ease of operation
If gaps are allowed between cable and insertion hole for smaller cables, then ease of insertion is improved, but waterproof and fire-blocking functions are compromised
Solution Approach 1:
The elastic adaptor maintains a larger relaxed diameter for easy cable insertion, then dynamically compresses to eliminate gaps and create a tight seal around the cable. This dynamic adjustment ensures both ease of insertion and reliable fire-blocking by removing spaces that could allow fire or water passage.
Solution Approach 2:
The adaptor's inner diameter parameter is changed from a larger value (facilitating insertion) to a smaller compressed value (eliminating gaps). This parameter transformation ensures that cables can be easily inserted while the compressed state prevents gaps that would compromise fire-blocking and waterproof reliability.
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 system effectively seals conduits by providing a customized adaptor for each cable diameter, preventing water ingress and fire spread, and ensuring high airtightness and waterproof performance.
Implementation Method 1
a body made of an elastic material and inserted into the through-hole, an adaptor which is made of an elastic material and has an outer surface in close contact with an inner surface of the body
Implementation Method 2
a fastener which is inserted to pass through the body, the front press plate, and the rear press plate and presses the front press plate and the rear press plate to press the body and the adaptor
Data Source
AI summary
An embodiment of the present invention provides a cable pathway sealing system for sealing a cable pathway having a through-hole through which an underground cable is inserted, and an installation method therefor, the cable pathway sealing system comprising: a body formed of an elastic material inserted in the through-hole; an adaptor including an elastic material, wherein the outer surface of the adaptor is in close contact with the inner surface of the body and the inner surface of the adaptor surrounds the underground cable; a front pressure plate provided on one end portion of the body; a rear pressure plate provided on the other end portion of the body; a fastening portion which is inserted through the body, the front pressure plate, and the rear pressure plate, and presses the body and the adaptor through the pressing of the front pressure plate and the rear pressure plate; and an adaptor selector which measures the outer diameter of the underground cable inserted in the through-hole and guides the adaptor that is suitable for the measured outer diameter of the underground cable.