Pulling Grip Assembly Sealing and Axial Twist
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Solution Overview
Problem
The existing pulling grip assemblies for multiple conductor cabling are prone to damage due to moisture and debris ingress, leading to capacitive alterations and potential safety issues during the pulling process, especially when force is applied improperly, which can result in costly repairs or replacement of entire cabling.
Innovation Solution
A pulling grip assembly design featuring a hollow fastening member and pulling cable assembly secured within a blind hole of a lug portion, where the hollow fastening member is locked within the blind hole to prevent moisture and debris ingress, and the pulling cable can twist axially to alleviate conductor jamming during conduit pulls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pulling grip has an open aperture for cable attachment, then the pulling cable can be easily attached to the conductor, but moisture and debris can ingress into the interior cavity and damage the conductor
Solution Approach 1:
The pulling grip is divided into separate functional zones: an exterior attachment region with the aperture for cable connection, and an interior protected cavity for conductor housing. The wall structure segments the harmful external environment from the vulnerable internal conductor space, allowing attachment functionality while preventing moisture and debris ingress.
Solution Approach 2:
The wall structure acts as an intermediary barrier between the external environment (moisture, debris) and the interior cavity (conductor). This intermediate structure allows the aperture to remain open for cable attachment while the wall itself prevents harmful substances from reaching the conductor inside.
2Length of moving object
If force is applied to pull conductors through lengthy conduit with bends, then the conductors can be installed over long distances, but improper force application can damage the conductors
Solution Approach 1:
The hollow fastening member provides a cushioning protective layer around the conductor before the pulling force is applied. This pre-protection structure distributes and absorbs the mechanical stress during the pulling process, preventing direct transmission of damaging forces to the conductor itself while enabling installation over lengthy conduit runs.
3Device complexity
If the pulling grip uses a traditional open structure, then the assembly is simple and accessible, but the conductor is vulnerable to capacitive alterations from environmental exposure
Solution Approach 1:
The grip structure is segmented into an exterior attachment portion and an interior protected cavity portion. This segmentation maintains the simplicity of the overall assembly while creating a distinct protected zone that prevents environmental exposure, thereby preserving conductor electrical performance without significantly increasing complexity.
Solution Approach 2:
The wall structure serves as an intermediary barrier that isolates the conductor from environmental factors. This intermediate protective layer prevents moisture and debris contact that could cause capacitive alterations, maintaining conductor reliability while keeping the grip structure relatively simple in design.
Data Source
AI summary
A pulling grip assembly and methods, systems, and apparatuses for constructing the pulling grip assembly are disclosed. The pulling grip assembly can include a pulling grip. The pulling grip can include an elongated body portion and a lug portion. The lug portion can include a blind hole for receiving an assembly including a hollow fastening member and a pulling cable retained within the hollow fastening member.