Spiral wound pipe rehabilitation equipment

WHAT IS SPIRAL WOUND LINING TECHNOLOGY?

Spiral Wound Lining technology represents a sophisticated trenchless rehabilitation method that involves the underground assembly of a modular winding machine within the host pipeline. The system utilizes prefabricated PVC-U strip profiles and stainless steel bands, which undergo rigorous quality inspection before being fed into the winding mechanism. The installation process synchronizes the spiral winding of both materials, with the PVC-U profiles' specially designed interlocking edges forming a continuous, structurally independent composite pipe within the existing conduit. Once the liner is installed, high-strength non-shrinkage grouting material is injected into the gap between the original pipeline and the iliner, ensuring a complete seal and enhancing the structural integrity of the new liner. This innovative approach creates a high-strength, watertight steel-reinforced polymer liner that effectively renews the pipeline's structural integrity.

Main Functions

1. Repairing Damaged Pipes

Remedies issues such as:

Cracks，Joint misalignment，Leakage，Corrosion，Aging/Deterioration

2. Creating a New Structural Pipe

Forms a:

Continuous PVC pipe，Structural liner，Fully structural pipe，

Enables the following, depending on design:

Semi-structural repair，Fully-structural repair

Complies with relevant standards for mechanical winding installation.

3. Enhancing Load-Bearing Capacity

The newly formed PVC structural pipe withstands:

Earth pressure，Surface traffic loads，Groundwater pressure，Long-term operational loads

Service life typically exceeds 50 years depending on design and operating conditions.

4. Improving Flow Capacity

The PVC inner wall is:

Smooth，Low-friction，Resistant to scaling/encrustation

Actual flow capacity is often maintained or improved, even with a slight reduction in pipe diameter.

5. Eliminating the Need for Large-Scale Excavation

Installation utilizes:

Manholes，Access shafts

...to complete the repair.

6. Installation with Live Flow Selected Conditions

Certain mechanical winding systems allow for:

Live flow installation，No flow interruption

Reduces or eliminates the need for large-scale flow diversion.

| Equipment Name             | Function                  |

| -------------------------- | ------------------------- |

| Spiral Winding Machine     | Spiral Winding Unit       |

| Hydraulic Power Unit       | Hydraulic Power Station   |

| PLC Control System         | PLC Intelligent Control System |

| Cable Winch                | Traction System           |

| PVC Profile Feeding System | Profile Feeding System    |

| Profile Coil Stand         | Profile Uncoiling Stand   |

| Profile Guide Device       | Guiding Device            |

| Joint Locking System       | Joint Locking Mechanism   |

| Grouting System Optional | Grouting System           |

| CCTV Inspection Camera     | Pipeline Inspection System|

| Generator Optional       | Power Generation System   |

1. Fixed-Head Winding Method

The winding machine remains stationary in the working shaft during operation. As the PVC profile and steel band are spirally wound, the entire newly formed pipe progressively advances along the pipeline's axial direction. This method is particularly suitable for projects with stable working shaft conditions.

2.In addition to standard circular pipes, drainage infrastructure includes various non-standard shapes such as rectangular channels and horseshoe-shaped conduits. To address the rehabilitation of these structures, Qingdao Jinjiedong developed a "self-propelled" mechanical spiral winding process; this utilizes a mobile winding machine that advances through the existing conduit while simultaneously winding the profile strip.

This process is capable of rehabilitating conduits of various shapes—including horseshoe, rectangular, and triangular profiles—with diameters ranging from D1000 to D5000.

Applicable Existing Pipes

Suitable for rehabilitating:

Reinforced Concrete Pipe RCP，Concrete Pipe，Clay Pipe，

Brick Sewer，Cast Iron Pipe，Steel Pipe，HDPE Pipe，PVC Pipe

GRP Pipe，Corrugated Pipe。

Working Principle

Step 1

Feed the continuous PVC profile into the equipment.

Step 2

The equipment continuously advances the profile using rollers.

Step 3The profile is spirally wound according to the set pitch.

Step 4

Adjacent interlocking mechanisms automatically engage.

Step 5

A continuous PVC liner pipe is gradually formed.

Step 6

Depending on the method:

Non-grouted Close Fit

The PVC fits tightly against the existing pipe.

Grouted

After forming the new pipe with a fixed diameter, a highly fluid cement-based grout is injected into the annular space between the existing pipe and the new pipe to secure the liner and restore structural integrity.

Construction Process

CCTV Inspection，Pipeline Cleaning，Removal of Local Obstructions

Equipment Lowering into Manhole，PVC Profile Feeding，Mechanical Spiral Winding

Formation of Continuous New Pipe，(Optional) Annular Grouting，Manhole Connection Treatment

Robotic Lateral Reinstatement，CCTV Acceptance Inspection，Commissioning

Key Application Sectors

Widely used in:

Municipal Sewer，Stormwater Drainage，Combined Sewer，Industrial Pipelines

Chemical Pipelines，Culverts，Irrigation Canals，Airport Drainage，Highway Drainage

Railway Drainage，Port Drainage，Mining Drainage，Power Plant Pipelines

Common Technology Types

1. Mechanical Spiral Wound

Continuous PVC profile，Mechanical interlocking，Grout-injected or close-fit options

2. Steel-Reinforced Spiral Wound

Features:

Steel strip embedded within the profile，Higher load-bearing capacity

Suitable for large diameters and high-load conditions

3. PVC Spiral Wound

Uses pure PVC profiles:

Lightweight，Corrosion-resistant，High installation efficiency

4. Grouted Spiral Wound

Features:

Annular space formed between the new and old pipes，Fixed via grouting，Enhances overall structural strength

5. Close-Fit Spiral Wound

Features:

Fits tightly against the existing pipe，No grouting required，Faster installation

Suitable for pipes in relatively good condition

Typical Solutions

Pipeline IssueRecommended Solution

Pipe agingPVC Spiral Wound Lining

Extensive corrosionSteel Reinforced Spiral Wound

Large-diameter sewer pipesStructural Spiral Wound

Stormwater pipe rehabilitationMechanical Spiral Wound

Pipe leakageGrouted Spiral Wound

Pipe cracksSpiral Wound Structural Lining

Sectional rehabilitation manhole-to-manholeContinuous Spiral Wound

Long-distance rehabilitationTraverse Winding Machine

High groundwater areasGrouted Spiral Wound System

Heavy traffic load areasSteel Reinforced PVC Liner