Pipe-Hoisting Strap Installation Tool for Trench Safety
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Solution Overview
Problem
The existing method of transferring a hoisting strap underneath a pipe in a trench is time-consuming and unsafe, as it requires a worker to enter the trench and manually pass the strap from one side to the other, risking trench collapse.
Innovation Solution
A device with a body that can be transversely installed onto a pipe, allowing for rotation and coupling with a hoisting strap, enabling the strap to be wrapped around the pipe from a safe elevated position, using a rotator device to rotate the body and a connector to secure the strap, facilitating safe and efficient transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a worker manually passes the hoisting strap underneath the pipe from one side to the other, then the strap transfer can be completed, but the worker is exposed to the risk of trench collapse and the process is time-consuming
Solution Approach 1:
The patent introduces a strap installation tool as an intermediary device that bridges the gap between the two sides of the pipe. The tool includes a body with a first connector on one side and a second connector on the other side, allowing the hoisting strap to be attached and transferred without direct worker intervention in the hazardous trench environment. The tool can be operated from above the trench, eliminating the need for workers to enter the unstable trench area.
Solution Approach 2:
The strap installation tool segments the strap transfer operation into distinct functional components: a body structure, first connector, second connector, and optional rotator device. This segmentation allows each component to perform its specific function independently, with the connectors facilitating strap attachment and detachment while the body provides structural support and enables rotation around the pipe.
2Productivity
If a worker manually passes the hoisting strap underneath the pipe, then the strap transfer can be completed, but the process is time-consuming
Solution Approach 1:
The strap installation tool enables self-service operation where the tool itself performs the strap transfer function without requiring continuous manual manipulation. The connectors are designed to automatically engage with and hold the hoisting strap, and the rotator device can automatically rotate the tool around the pipe, eliminating the time-consuming manual passing and positioning operations.
Solution Approach 2:
By introducing the strap installation tool as an intermediary, the direct manual manipulation of the strap is eliminated. The tool mediates the transfer process by providing a mechanical means to attach, rotate, and detach the strap, significantly reducing the time required compared to manual methods.
3Adaptability or versatility
If the body is designed to rotate around the pipe, then the hoisting strap can be wrapped around the pipe, but the device complexity increases
Solution Approach 1:
The body is designed with dynamic rotation capability around the pipe, allowing it to adapt its orientation as needed. The rotator device provides the necessary torque to rotate the body, and the connectors are positioned to maintain functionality throughout the rotation. This dynamic capability enables the tool to wrap the hoisting strap around the pipe effectively.
Solution Approach 2:
The strap installation tool is designed as a multi-functional device that combines strap attachment, rotation around the pipe, and strap detachment capabilities in a single tool. The body structure serves multiple purposes: providing structural support, enabling rotation, and holding the connectors in appropriate positions. This universality reduces the need for multiple separate tools.
Data Source
AI summary
A device operable, by a user standing above the grade of a pipe, to install a hoisting strap around the pipe. A device body carries wheels and has an opening structured for installation onto the pipe at a mid-span location. The opening is reversably enlarged during installation of the device to permit entrance of the pipe into partially encircled engagement by the body. Typically, three or more wheels are biased by the body into rolling engagement on the pipe at the installed position. Once installed, the device captures an end of the hoisting strap, and carries the strap end under the pipe as the device is rotated about the pipe centerline. The strap end can then be removed from the device to sling the pipe in a conventional lifting arrangement. The device can be removed from the pipe by pulling the device to again expand the opening.