Dual-Zone Backflow Cartridge Testing in a Compact Valve Assembly
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Solution Overview
Problem
Existing backflow prevention assemblies are elongated, difficult to assemble, and time-consuming to repair, leading to downtime and increased material costs.
Innovation Solution
A backflow prevention assembly with a body forming upstream and downstream buckets, featuring single and dual zone test covers and cartridge assemblies with interchangeable frames and springs, allowing for compact design and easy assembly, and enabling efficient testing of multiple pressure zones without tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If three taps or test cocks are spread out along the BFP assembly body for checking pressures, then pressure testing capability is improved, but the assembly becomes unduly elongated
Solution Approach 1:
The patent consolidates multiple test cocks into a single test cover by routing pressure measurement ports through internal passages and chambers within the test cover structure. This dimensional reorganization allows pressure testing functionality to be achieved without extending the assembly length, as all test connections are accessed through one localized cover rather than being distributed along the body.
Solution Approach 2:
The test cover contains multiple test cocks and pressure sensing chambers nested within its structure. The internal passages and chambers are arranged concentrically or in compact configurations, allowing multiple pressure measurement functions to be integrated into a single compact unit, thereby avoiding the need for multiple distributed taps along the assembly body.
2Reliability
If check valve repair or replacement is performed by closing inlet and outlet shutoff valves, then backflow prevention is maintained, but the process becomes time-consuming and complex
Solution Approach 1:
The check valve assembly is designed as a separable component that can be removed and replaced independently from the main BFP assembly body. This segmentation allows the check valve to be swapped without requiring closure of the inlet and outlet shutoff valves, thereby maintaining backflow prevention while significantly reducing repair time and complexity.
Solution Approach 2:
The check valve is pre-assembled as a complete replaceable unit with all necessary components integrated. This preliminary preparation allows for quick installation by simply replacing the entire assembly, eliminating the need for on-site assembly and adjustment during repair, thus reducing downtime while maintaining system reliability.
3Ease of repair
If multiple components are assembled on-site for check valve repair, then repair flexibility is improved, but assembly errors increase and repair difficulty increases
Solution Approach 1:
The check valve is designed as a modular, pre-assembled unit that replaces multiple individual components. This segmentation eliminates the need for complex on-site assembly operations, reducing assembly errors while maintaining repair flexibility through easy replacement of the complete module.
Solution Approach 2:
The check valve is designed as a disposable or easily replaceable component with a simplified structure that prioritizes ease of replacement over long-term adjustability. This approach reduces assembly complexity and errors by eliminating the need for precise on-site assembly, while the low cost of the replaceable unit makes frequent replacement economically viable.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The assembly is more compact, reduces assembly errors, saves space and materials, and simplifies repair by allowing preassembly and tool-free replacement of components, while ensuring effective backflow prevention.
Implementation Method 1
a spring urging the valve member into the closed position
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A backflow prevention assembly includes a body forming two buckets, wherein flow passes through the body from an inlet to an outlet along an axis and consecutively through each of the buckets. A single zone test cover encloses a first of the buckets to form a single zone chamber. A dual zone test cover encloses a second of the buckets with a dual zone cartridge assembly therein. The dual zone test cover has two test cocks. The dual zone cartridge assembly includes a frame having a valve seat, wherein the frame includes a lumen providing fluid communication from a dual zone chamber upstream of the valve seat to a first of the two test cocks of the dual zone test cover, and wherein the second of the two test cocks of the dual zone test cover is in fluid communication with the dual zone chamber downstream of the valve seat.