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Pressure structure clamp and fiber compound material combination expander technology

A fiber-reinforced and composite material technology, applied in the direction of manufacturing tools, workpiece clamping devices, pipe components, etc., can solve problems such as difficult to achieve reinforcement effects, and achieve the effects of extensive crack arrest, internal pressure resistance, and enhanced strength

Inactive Publication Date: 2008-06-25
BEIJING SAFETECH PIPELINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented method combines two technologies: repairs made by injecting cured resins into damaged areas around metal tubular components such as pressurized water systems (PWR), gas distribution networks, oil tankers, nuclear power plants, chemical processing facilities, refineries, transportation terminals, buildings, bridges, roads, railways, dams, airports, sewers, underground parking lots, stadiums, train stations, ships' hulls, boats, aircraft carriages, space vehicles, military installations, infrastructure projects, construction sites, road works, industrial processes, and other applications where there may occur damage caused during use due to factors like corrosion from rainwater, snow melting agents used at high altitudes, salt spray, extreme temperatures, radiation exposure, excessive vibration, impact loads, and others. These methods help prevent these issues through enhancing the durability and reliability of steel products that are exposed over time.

Problems solved by technology

Technological Problem: Current techniques like adding inspections (pipeline monitoring) to prevent failures caused by pitting corrode crack growth require frequent replacements even if they were successful during maintenance work. Additionally, current technologies including injecting thermosetting plastic cement tend to lack sufficient durability against stress factors such as tensile stresses and environmental conditions associated with installation processes.

Method used

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  • Pressure structure clamp and fiber compound material combination expander technology
  • Pressure structure clamp and fiber compound material combination expander technology
  • Pressure structure clamp and fiber compound material combination expander technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Example 1 Pipeline Mechanical Damage Defect Reinforcement Experiment

[0110] The diameter of the pipe chosen for the experiment is Φ720mm, the wall thickness is 9mm, and the material is Q235b. There is a mechanical damage 40mm long, 10mm wide, and 4.5mm deep on the pipe. Such as figure 1 . The pipeline is repaired and reinforced by using the technology of injecting curable polymer into the composite material reinforced clamp of the present invention.

[0111] The experiment is carried out as follows:

[0112] 1. Carbon fiber composite reinforcement

[0113] Firstly, the surface of the metal pipe (1) is cleaned;

[0114] Repair the defects on the surface of the metal pipe: fill the mechanical damage defect (2) on the surface of the steel pipe with filling resin, and repair it until the surface is smooth;

[0115] Wet bonding of carbon fiber cloth: 200mm in length and 2170mm in width, 1 layer of carbon fiber is pasted along the axial direction of the pipeline, wher...

Embodiment 2

[0129] Example 2 Reinforcement experiment of cross pipe support

[0130] The pipe (1) selected for the experiment has a diameter of Φ720mm, a wall thickness of 9mm, and a material of Q235b. There is a 600mm long cross fixed pipe support (welded axial thrust pipe support) directly below the pipe. The engineering design pressure of the pipeline is 4.3MPa, and the pipeline is reinforced by injecting curable polymer technology into the composite material reinforcement fixture of the present invention to increase the pressure.

[0131] The experiment is carried out as follows:

[0132] 1. Carbon fiber composite reinforcement

[0133] Firstly, surface cleaning of metal pipes;

[0134] Repair the defects on the surface of the metal pipe: fill the concave parts on the surface of the steel pipe, such as honeycomb, pockmarked surface, small hole, near the weld, etc., with repair glue, and repair until the surface is smooth;

[0135] Wet paste carbon fiber cloth: according to length ...

Embodiment 3

[0149] Embodiment 3 Girth weld reinforcement experiment

[0150] The diameter of the pipe chosen for the experiment is Φ325mm, the wall thickness is 7mm, and the material is Q235b. The middle of the pipe is a girth weld, and the length of the fixture is 400mm (see attached Figure 9 ).

[0151] The experiment is carried out as follows:

[0152] 1. Carbon fiber composite reinforcement

[0153] Firstly, surface cleaning of metal pipes;

[0154] Fill in the vicinity of the weld with repair glue to repair until the surface is smooth;

[0155] Wet paste carbon fiber cloth (see attached Figure 10 ).

[0156] The carbon fiber composite material is solidified to reach strength, and the next step is performed.

[0157] 2. Making jigs

[0158] Similar to Example 1, according to pipeline structure and shape, processing fixture (see attached Figure 9 ).

[0159] 3. Assembly and installation of fixtures (see embodiment 1)

[0160] 4. Sealing of annular space.

[0161] Use sea...

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Abstract

The invention relates to a repairing-reinforcing and an enhancement technique for a pressure pipeline, a pipe casting and a pressure container, in particular to a repairing-reinforcing technique and enhancement technique of the combination of fibre reinforced composite materials and a clamp injected with solidifiable polymers carried through on the structure and the using method as well as the application of the technique. The repairing-reinforcing and the enhancement technique of the invention is to pave one layer or multiple layers of the fibre reinforced composite materials on the parts needed repairing, reinforcing or enhancing firstly; then mounting the clamp on the outer surface of the fibre reinforced composite materials and fills the solidifiable polymers between the clamp and the pipeline, the pipe casting or the pressure container to finish the repairing-reinforcing and enhancement of the part. The repairing-reinforcing and the enhancement technique of the invention is suitable for carrying out temporary emergency repair or long term repairing-reinforcing and enhancement on various pipeline, pile casting and pressure container to prolong the service life and improve the safety operation pressure.

Description

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Claims

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Application Information

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Owner BEIJING SAFETECH PIPELINE
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