Spiral Hanger Cable Installation Using Lead Wire Coupling
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Solution Overview
Problem
Existing cable installation methods face difficulties in workability due to increased weight and friction, leading to challenges in attaching and detaching spiral hangers and cables, especially over long distances, with issues like pulley falling off the messenger wire and increased work time.
Innovation Solution
A cable installation method using a lead wire with connectors to suspend and connect spiral hanger units, allowing for easy attachment and detachment, and a coupling unit with a rod-shaped body for secure connections, facilitating the feeding of cables between poles with improved workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a leading pulley is used to push the spiral hangar along the messenger wire, then the spiral hangar can be delivered from one end to the other end, but the leading pulley's own weight and the spiral hangar's own weight increase as the spiral hangar is delivered, which causes difficult delivering and thus degraded workability
Solution Approach 1:
The spiral hangar is divided into multiple spiral hangar units that can be connected in series. Each unit has a leading end connector and a tail end connector, allowing the system to be segmented into manageable sections that can be assembled and delivered incrementally along the messenger wire, reducing the initial weight burden.
Solution Approach 2:
A coupling unit is introduced as an intermediary component between the lead wire and the spiral hangar unit. This coupling unit facilitates easy attachment and detachment operations, improving workability by simplifying the connection process and reducing the manual effort required for attaching and detaching heavy components.
2Productivity
If the leading pulley is used, then the spiral hangar can be delivered, but the pulley may fall out of the messenger wire while the lead wire is fed, which requires additional work of putting the pulley again and increases work time
Solution Approach 1:
The leading pulley is extracted from the system and replaced with a lead wire that is directly fed through the spiral hangar units. This eliminates the pulley component that was prone to falling off, thereby removing the source of the reliability problem and the associated additional work time.
Solution Approach 2:
Instead of using a pulley to push the spiral hangar forward, the approach is inverted by feeding the lead wire through the spiral hangar units from the leading end. The spiral hangar units are pulled along by the lead wire rather than being pushed by a pulley, which eliminates the pulley falling-off issue.
3Ease of operation
If a weight is attached to the leading end of the spiral hangar to feed the lead wire, then the lead wire can be attached, but the weight increases the friction between the messenger wire and the spiral hangar, which causes difficult feeding of the lead wire and thus degraded workability
Solution Approach 1:
Instead of attaching weight to the leading end to feed the lead wire, the approach is inverted by feeding the lead wire through the spiral hangar units from the leading end connector. The lead wire is pulled through the internal space of the spiral hangar units, eliminating the need for additional weight and reducing friction with the messenger wire.
Solution Approach 2:
The coupling unit serves as an intermediary that facilitates the attachment of the lead wire to the spiral hangar unit without requiring additional weight. This intermediary component enables smooth feeding of the lead wire by providing a proper connection interface that reduces friction and improves workability.
4Length of stationary object
If the spiral hangar is made up of multiple connected units, then the cable installation can be extended to long distances, but the attachment and detachment operations become more complex
Solution Approach 1:
The spiral hangar is segmented into multiple standardized units with leading end connectors and tail end connectors. This segmentation allows the system to be extended to long distances by simply connecting additional units in series, while the standardized connector design keeps the attachment and detachment operations relatively simple and repeatable.
Solution Approach 2:
The coupling unit acts as an intermediary component that simplifies the attachment and detachment operations between lead wire and spiral hangar units. By providing a standardized connection interface, the coupling unit reduces the complexity of these operations even when multiple spiral hangar units are involved in long-distance installations.
Data Source
AI summary
The present invention provides a cable installation method and a coupling unit, the cable installation method enabling the installation of a cable with an improved workability. From a messenger wire 11 installed between poles 10a and 10b, a spiral hangar unit 121 or the like is suspended in the vicinity of first pole 10a, the leading end of the spiral hangar unit 121 and the leading end of the lead wire 13 is connected to each other with a coupling unit 14 interposed therebetween an operation of connecting another spiral hangar unit 122 to a tail end of the spiral hangar unit 121 while feeding the lead wire 13, is repeated, the spiral hangar unit 121 is fed to the vicinity of second pole 10b, then the spiral hangar 12 is fixed to the messenger wire 11, and thereafter a cable 16 is installed between the poles.