Foldable Composite Utility Enclosure With Hot-Assembled Hinged Sides
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Solution Overview
Problem
Concrete utility enclosures are cumbersome, prone to damage during transport, and difficult to install due to their weight, while existing plastic enclosures are also bulky and inefficient for space usage.
Innovation Solution
A foldable plastic/composite utility enclosure with hinged sides that can be assembled quickly and folded for reduced storage and transportation space, utilizing glass fiber-reinforced thermoplastic for strength and stability, with central holes formed during molding to facilitate rapid assembly and prevent warping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If concrete utility enclosures are used to withstand heavy loads, then structural strength is improved, but weight and ease of handling deteriorate
Solution Approach 1:
The utility enclosure uses a composite structure combining concrete base with a steel-reinforced cover assembly. The steel frame with cross-bracing and concrete panels creates a composite structure that achieves high strength-to-weight ratio, allowing the cover to withstand heavy loads while being lighter and more handleable than solid concrete enclosures.
2Weight of moving object
If plastic utility enclosures are used to reduce weight, then ease of handling is improved, but structural strength deteriorates
Solution Approach 1:
The enclosure combines concrete (providing compressive strength) with steel reinforcement (providing tensile strength and structural framework). This composite construction allows the structure to achieve the strength of concrete while being lighter and more manageable than solid concrete enclosures.
Solution Approach 2:
The cover assembly incorporates a steel frame with cross-bracing that provides structural strength while allowing for potential movement or adjustment. The hinged or removable cover design allows the structure to adapt between protected and accessible states, improving handling flexibility.
3Reliability
If traditional utility enclosures are used to provide protection, then reliability is improved, but ease of installation deteriorates
Solution Approach 1:
The utility enclosure is divided into separate components: a concrete base and a steel-reinforced cover assembly that can be installed independently. The cover assembly itself consists of modular elements (frame, bracing, panels) that can be assembled on-site, significantly improving ease of installation while maintaining protection capability.
4Reliability
If conventional enclosures are used to ensure durability, then reliability is improved, but device complexity deteriorates
Solution Approach 1:
The steel frame with diagonal cross-bracing creates a structurally efficient composite system that achieves high durability through material properties and geometric configuration rather than complex assembly. The concrete panels provide protective cladding that simplifies the overall structure while maintaining durability.
Data Source
AI summary
A method of forming and assembling a foldable plastic utility enclosure using molds to form sides of the enclosure, preferably using glass fiber-reinforced thermoplastic composite. The molds are constructed to form a central hole in hinge members which are formed on ends of the sides. The central hole of the hinge member is molded with two molding parts, wherein one or both of the molding parts have a solid central portion that forms the central hole. The sides are removed from the molds after curing and the sides are assembled to form the utility enclosure while the sides are still hot from the molding process. Hinge pins are inserted into the central holes of the hinge members to form hinges and to prevent the sides from warping during cooling. Assembling the sides and inserting hinge pins to form the utility enclosure is completed within approximately 10 minutes after removing the sides from the molds.