Telescoping Meter Box Couplings for Variable Water Meter Lengths
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Solution Overview
Problem
Conventional water meter boxes lack flexibility to accommodate meters of varying lengths, as standard connections do not allow for adjustable lengths, making it difficult to install meters of unknown lengths without replacing the entire box or modifying internal components.
Innovation Solution
The meter box incorporates telescoping tubes in both the ball valve and outlet couplings, allowing for adjustable lengths to accommodate meters of different lengths, with features like seals, protrusions, and service nuts for easy extension and retraction, enabling the same box to fit meters ranging from 110 mm to 165 mm and beyond.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If standard sized connections are used in conventional meter boxes, then the box structure is simple and easy to manufacture, but the box cannot accommodate meters of varying lengths
Solution Approach 1:
The coupling structure incorporates telescoping tubes that can dynamically adjust their length by extending and retracting. The telescoping mechanism includes an inner tube that moves relative to an outer tube, allowing the coupling length to be adjusted to accommodate meters of different lengths while maintaining a compact stored position.
Solution Approach 2:
The coupling is divided into multiple segments including an outer tube, an inner telescoping tube, and connection elements. This segmentation allows each component to perform its specific function while enabling the overall structure to adapt to different meter lengths through the relative movement of segments.
2Adaptability or versatility
If telescoping tubes are added to allow adjustable lengths, then the box can accommodate various meter lengths, but the coupling structure becomes more complex
Solution Approach 1:
The telescoping tube is nested within the outer tube, with the inner tube fitting inside the outer tube similar to nested dolls. This nesting arrangement allows the adjustable length mechanism to be compact and integrated within the existing coupling footprint, reducing manufacturing complexity compared to external extension mechanisms.
Solution Approach 2:
The telescoping coupling structure serves multiple functions: it provides adjustable length accommodation, maintains structural support, and ensures fluid tightness through integrated seals. This multi-functionality reduces the need for additional separate components, thereby managing manufacturing complexity.
3Adaptability or versatility
If telescoping tubes are used for adjustable length, then flexibility is improved, but sealing integrity may be compromised
Solution Approach 1:
Seals are introduced as intermediary elements between the telescoping tubes and the outer tube. These seals act as mediators that maintain fluid tightness while allowing the relative movement necessary for length adjustment. The seals are positioned at the interfaces where the inner tube meets the outer tube to prevent leakage.
Solution Approach 2:
The sealing mechanism employs flexible seal elements that can deform and conform to the moving interfaces of the telescoping tubes. These flexible seals maintain continuous contact with the tube surfaces during extension and retraction, ensuring sealing integrity throughout the range of motion.
4Adaptability or versatility
If the entire meter box is replaced to accommodate different meter lengths, then proper fit is ensured, but cost and time increase
Solution Approach 1:
The telescoping couplings allow the meter box system to dynamically adapt to different meter lengths without replacement. The couplings can be extended or retracted as needed, providing a time-efficient solution compared to complete box replacement while ensuring proper fit for various meter sizes.
Data Source
AI summary
Illustrative embodiments of a meter box and couplings, either separately or in combination, are provided. An illustrative embodiment provides a valve coupling that is disposed through a wall of the meter box such that a first portion of the valve coupling extends exterior of the meter box and a second portion of the valve coupling extends interior of the meter box. An outlet coupling is disposed through the wall of the meter box such that a first portion of the outlet coupling extends exterior of the meter box and a second portion of the outlet coupling extends interior of the meter box. A telescoping tube is located in the meter box, extended into and movable relative to, and in fluid communication with, at least one of the second portion of the valve coupling and/or the second portion of the outlet coupling. The telescoping tube varies a distance between the valve coupling and the outlet coupling within the meter box.