Perforated Polymeric Sheet With Spacers for Pipeline Moisture Circulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing polymeric sheets for protecting underlying structures like pipelines lack adequate impact protection, moisture circulation, and efficient cathodic protection due to insufficient perforation size and thickness, leading to inefficiencies in corrosion prevention and high installation costs.
Innovation Solution
A perforated polymeric sheet with integrated spacers that allows for moisture and air circulation, featuring a thickness of 0.5-3.5 mm and hole diameters between 3-5 mm, spaced to ensure impact protection and electron conductivity for cathodic protection, made from materials like LLDPE with conductive undersides and specific mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a thin polyolefin layer is used for corrosion protection, then material cost and weight are reduced, but impact protection and moisture circulation are insufficient
Solution Approach 1:
The polyolefin layer is provided with an array of perforations extending through its thickness, transforming it from a solid impermeable barrier into a porous structure that allows moisture circulation while maintaining impact protection. The perforations enable the material to fulfill multiple functions simultaneously: mechanical protection and moisture permeability.
Solution Approach 2:
The invention adds the dimensional aspect of vertical spacing by attaching spacers to the lower surface of the polyolefin layer. This creates a three-dimensional protective envelope around the pipeline, ensuring uniform spacing and preventing bonding between the protective layer and pipeline surface, thereby enabling moisture circulation in the gap space.
2Use of energy by moving object
If micro perforations are made in the polyolefin layer, then cathodic protection current requirement is reduced, but moisture circulation is blocked
Solution Approach 1:
The polyolefin layer is provided with an array of perforations extending through its thickness, transforming it from a solid impermeable barrier into a porous structure that allows moisture circulation while maintaining impact protection. The perforations enable the material to fulfill multiple functions simultaneously: mechanical protection and moisture permeability.
Solution Approach 2:
The invention adds the dimensional aspect of vertical spacing by attaching spacers to the lower surface of the polyolefin layer. This creates a three-dimensional protective envelope around the pipeline, ensuring uniform spacing and preventing bonding between the protective layer and pipeline surface, thereby enabling moisture circulation in the gap space.
3Strength
If the polyolefin sheet bonds to the pipeline coating, then attachment is secure, but moisture circulation between pipeline and protective layer is prevented
Solution Approach 1:
The spacers act as intermediary elements between the polyolefin protective layer and the pipeline coating. These spacers prevent direct contact and bonding between the two surfaces while maintaining secure attachment of the protective layer to the pipeline, thereby enabling moisture circulation in the created gap space.
4Ease of manufacture
If a two-step installation process with separate geonet and geotextile layers is used, then material availability and cost are improved, but installation time and complexity increase
Solution Approach 1:
The invention merges the geonet and geotextile layers into a single integrated polyolefin sheet with attached spacers. This consolidation maintains the advantages of material availability and cost-effectiveness while eliminating the time-consuming separate installation steps, allowing the entire protective system to be applied in one continuous operation.
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 solution provides enhanced protection against impact and corrosion, ensures effective moisture circulation for cathodic protection, and simplifies installation with reduced material bonding to the pipeline, addressing the limitations of prior art.
Implementation Method 1
The anti-corrosive material is comprised of a layer of polyolefin having a plurality of micro perforations formed therein. The micro perforations allow the anti-corrosive material to be utilized with cathodic systems to provide for a significant reduction in the amount of electrical current required to achieve cathodic protection.
Implementation Method 2
The polyolefin is preferably polyethylene or polypropylene and most preferably polyethylene. Either high- or low-density polyolefin may be used. Polyolefin sheet prevents cathodic protection of the steel pipe as it insulates the pipe from the ground, preventing electron migration to prevent corrosion.
Data Source
AI summary
A new protective polymeric sheet is described wherein said polymeric sheet includes perforations and attached spacers that allow air and water circulation when the sheet is in use. The sheet protects underlying structures from damage while ensuring moisture migration between the protective polymeric sheet and the underlying structure. The protective polymeric sheet comprises a plurality of perforations extending through the sheet and a plurality of spacers, each spacer extending from a lower surface of the sheet adjacent to one side of each perforation. The spacers are created during perforation of the polymeric sheet. The protective polymeric sheet is useful in a number of applications, including without limitation: to protect pipelines; to replace geotextiles in heap leach processes; to line sandboxes and paving stones; to cover greenhouse floors; to make industrial or residential gutter caps; and as a filter.