HDPE Patch Attachment for Wastewater Lagoon Covers
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Solution Overview
Problem
Existing methods for attaching HDPE patches to wastewater treatment lagoon covers are inefficient, as they require direct welding to the cover sheet, which can be cumbersome and time-consuming, especially for large-scale applications like wastewater treatment lagoons.
Innovation Solution
A method and apparatus for pre-attaching HDPE patches to the HDPE cover material using robot arms and a vacuum-operated suction plate/block system, allowing for distributed and efficient attachment of additional straps and ballast pipes by providing a locally increased thickness for secure anchoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct welding is used to attach HDPE patches to the cover sheet, then the patches can be securely attached, but the process becomes cumbersome and time-consuming
Solution Approach 1:
The patent applies preliminary action by pre-attaching HDPE patches to HDPE straps in a controlled environment before deployment. The patches are welded to the straps off-site, allowing the cover to be installed first, and then the pre-assembled strap-patch assemblies are quickly attached to the cover using vacuum suction devices, significantly reducing on-site welding time while maintaining secure attachment.
Solution Approach 2:
The patent introduces an intermediary element - the HDPE strap with pre-attached patch - that mediates between the patch and the cover sheet. Instead of directly welding patches to the large cover sheet, the patches are first attached to straps, which then serve as carriers for easy positioning and attachment to the cover, simplifying the overall attachment process.
2Reliability
If HDPE patches are attached at distributed locations on the cover, then locally increased thickness is provided for secure anchoring, but the attachment process becomes more complex
Solution Approach 1:
The vacuum suction attachment device attaches multiple patches simultaneously across distributed locations on the cover. The device moves systematically across the cover surface, automatically positioning and attaching patches at predetermined distributed locations without requiring complex manual intervention at each location, thereby managing complexity while achieving secure distributed anchoring.
Solution Approach 2:
The patent segments the attachment process into standardized units - each HDPE strap with its attached patch represents a modular assembly. These standardized modules can be attached at distributed locations independently, making the complex task of distributed patch attachment manageable through repetition of a standardized procedure rather than custom work at each location.
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
This approach streamlines the attachment process by enabling the pre-attachment of patches on a roll of HDPE material, reducing installation time and enhancing the structural integrity of the lagoon cover with secure anchoring points for ballast pipes, thus improving the efficiency and reliability of wastewater treatment lagoon covers.
Implementation Method 1
a vacuum-operated suction plate/block system
Data Source
AI summary
The invention relates to covers for wastewater treatment lagoons, which are typically covered by expansive stretches of sheet-form, high density polyethylene (HDPE). The invention more particularly relates to improvements in attaching HDPE patches at distributed locations thereon, which patches provide locally increased thickness to the cover in service as seats for attachment of further attachments to the cover, such as for example and without limitation HDPE straps for retention of HDPE grout-filled ballast pipes, and so on.