CIPP Liner Assembly for Sealing Lateral-to-Main Pipe Junctures

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Solution Overview

Problem

Existing pipe lining systems fail to effectively address leaks and infiltration issues at the junctures of lateral and main pipes, particularly due to inadequate sealing and durability, leading to inflow and infiltration problems over time.

Innovation Solution

A CIPP (Cured-in-Place Pipe) liner system comprising a main line liner and a CIPP lateral liner, attached to a bladder, with a felt layer and membrane, and a backing ring for enhanced adherence and resin saturation, allowing for improved positioning and curing within the pipe, thereby providing a strong and resilient seal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a T or Y shaped liner is inserted to repair the damaged juncture, then the repair device can be positioned in the correct location, but the adherence to the host pipe is insufficient

Engineering Contradiction:

Improverepair effectivenessVSAvoidadherence to host pipe

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The liner is divided into separate main line liner and lateral liner components that can be independently positioned and installed, allowing each segment to achieve optimal adherence to its respective pipe section while maintaining juncture integrity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The liner system uses composite material construction with resin-impregnated felt or fabric layers that provide superior bonding strength to the host pipe walls, resolving the adherence insufficiency of prior T or Y shaped liners

Inventive Principle:

Principle #40Composite materials

2Duration of action of moving object

If the liner is saturated in resin before positioning, then the curing process can begin, but positioning the repair device in the pipe becomes time consuming and difficult

Engineering Contradiction:

Improvecuring timeVSAvoidpositioning time

Core Design Contradiction:

Duration of action of moving objectVSLoss of time

Solution Approach 1:

The liner is pre-saturated with resin and partially cured in a controlled environment before installation, allowing it to maintain flexibility during positioning while reducing the on-site curing time and simplifying the installation process

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The liner system allows for dynamic adjustment during installation, enabling the liner to be positioned and configured in the pipe before final curing, thus eliminating the time loss associated with rigid pre-positioning requirements

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If a hole is required in the main pipe line for lateral pipe line connection, then the lateral pipe line can be inserted, but I/I occurs from the moment of installation

Engineering Contradiction:

Improveconnection capabilityVSAvoidinflow and infiltration

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The lateral liner is nested within the main line liner, with both liners working together to create a seamless seal at the juncture, eliminating holes and preventing I/I while maintaining the connection capability between lateral and main pipes

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The liner system provides enhanced sealing specifically at the juncture area where I/I problems occur, while maintaining the structural integrity and flow characteristics of the rest of the pipe system

Inventive Principle:

Principle #3Local quality

4Reliability

If surrounding earth shifts or plant roots infiltrate the juncture, then damage or weakening occurs, but prior art devices fail to provide sufficient repair

Engineering Contradiction:

Improverepair durabilityVSAvoidjuncture integrity

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The liner uses composite material construction with resin-impregnated reinforcement layers that provide superior strength and durability, creating a robust seal that resists damage from earth shifts, plant roots, and flexural problems

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The liner system provides preemptive protection by creating a protective barrier within the pipe that cushions against future damage from environmental factors, preventing deterioration before it occurs

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 system achieves superior resin saturation and adherence to the pipe walls, resulting in enhanced durability and reduced infiltration, extending the lifespan of the repaired pipe and improving flow characteristics.

Implementation Method 1

the bladder is inflated

Methodology Applied

Scientific EffectPressure: Pressure Increase

Implementation Method 2

curing within the pipe

Methodology Applied

Scientific EffectCuring: Chemical Bonding

Data Source

PatentUS11560975B2Pipe lining systems and methods of use

Publication Date: 2023.01.24 BLD SERVICES LLC

AI summary

Systems and methods for pipe lining systems and methods of use are described. Systems and methods may include a CIPP lateral liner that is inserted into a bladder forming a CIPP liner assembly that can be inserted into a pipe line for a pipe repair. CIPP liner assembly can include a membrane that produces superior results compared to the prior art. A backing ring may be used with these systems and methods.