Cable Gland Multi-Point Locking and Waterproof Seal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cable glands fail to securely lock cables and flexible conduits together, leading to disconnection under external forces and inadequate moisture protection, resulting in potential short circuits and fire hazards.
Innovation Solution
A cable and flexible conduit gland design featuring a tapered rubber collar and elastic packing ring that compresses against both the conduit and cable, providing multi-point locking and enhanced waterproofing through a combination of internal and external sealing mechanisms, including a holding-down cap and beveled edges, to achieve IP-68 ratings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer packing ring is used to clamp the cable, then the structure is simple, but the clamping force is insufficient and the cable may disconnect under external force
Solution Approach 1:
The single-layer packing ring is divided into multiple layers (first packing ring and second packing ring) arranged in sequence along the cable. Each layer provides independent clamping force at different positions, transforming a single-point clamping system into a multi-point clamping system that distributes and enhances the total clamping force while maintaining structural simplicity.
Solution Approach 2:
The packing rings are arranged in the axial dimension (along the cable length) rather than only in the radial dimension. This multi-layer axial arrangement creates multiple clamping points along the cable, enhancing the overall clamping force and preventing cable disconnection under external forces.
2Device complexity
If a single-point clamping force is applied through the packing ring, then the device structure is simple, but the clamping force is insufficient to lock the cable and protect against moisture
Solution Approach 1:
The clamping force application is segmented into multiple locations through the first and second packing rings. Each packing ring applies clamping force at its respective position, creating a distributed multi-point clamping system that accumulates sufficient total force to securely lock the cable and provide effective moisture protection.
Solution Approach 2:
The clamping force is applied along the axial dimension through multiple packing rings positioned at different locations. This transforms a single-point radial clamping system into a multi-point distributed clamping system, enhancing the total clamping force through the cumulative effect of multiple packing rings.
3Device complexity
If the cable gland only provides basic locking function, then the device is simple, but it cannot prevent disconnection when cable is stretched by external force
Solution Approach 1:
The cable gland incorporates multiple packing rings positioned in sequence along the cable, creating multiple clamping points. This segmented approach distributes the stress from external forces across multiple locations, enhancing the gland's ability to resist cable disconnection while maintaining a relatively simple overall structure.
Solution Approach 2:
The gland structure extends along the axial dimension with multiple packing rings at different positions. This multi-dimensional arrangement provides distributed clamping force that resists external stretching forces more effectively than a single-point clamping system.
4Device complexity
If a single-layer sealing structure is used, then the device is simple, but it provides insufficient waterproof protection
Solution Approach 1:
The sealing structure is segmented into multiple layers with the first packing ring and second packing ring arranged in sequence. Each layer provides an independent sealing barrier, creating a multi-layer defense system that effectively prevents moisture penetration while maintaining a relatively simple overall sealing structure.
Solution Approach 2:
The sealing protection is extended along the axial dimension through multiple packing rings positioned at different locations. This multi-layer axial arrangement creates multiple sealing barriers that collectively provide superior waterproof protection compared to a single-layer sealing structure.
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 design effectively secures cables and conduits against disconnection and moisture ingress, ensuring reliable signal transmission and preventing accidental fires by providing a robust, waterproof seal that withstands external forces and environmental factors.
Implementation Method 1
a tapered front extension fitting the tapered inner surface of the casing and an axial through hole cut through front and rear ends thereof
Implementation Method 2
an elastic packing ring stopped against the rear end of the collar
Implementation Method 3
the tapered inside wall and the tapered front extension of the collar are respectively compressed against the inserted flexible conduit and the inserted cable, enhancing the pressure to hold down the inserted flexible conduit and cable
Data Source
AI summary
A cable and flexible conduit gland for securing a cable and a flexible conduit to a box member is disclosed to include a casing having a middle stop flange extending around the periphery thereof, a first fastening member and a second fastening member formed integral with the periphery thereof and respectively disposed at two opposite sides relative to the middle stop flange ad and a tapered inner surface portion located on the inside wall, a collar inserted into the casing and having a tapered front extension fitting the tapered inner surface of the casing, an elastic packing ring stopped against the rear end of the collar, and a holding-down cap fastened to the first fastening member of the casing to hold down the collar and the packing ring and to lock the inserted flexible conduit and cable together.