Assembly type blowing system special for online repair of cold insulation structure and suitable for various pipe diameters

An assembled, multi-diameter technology, applied in the pipeline system, pipe components, injection devices, etc., can solve the problems of insufficient defrosting, potential safety hazards, poor wiping effect of rags, etc., and achieve rapid defrosting and deicing , Improve the convenience of operation, good effect of purging

Pending Publication Date: 2019-12-31
CNOOC GAS & POWER GRP
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used methods in the receiving station mainly use simple rags to wipe or use organic solvents such as absolute ethanol to pour or wipe on the surface of the pipeline, but there are many shortcomings, such as poor wiping effect with rags, and ice particles solidified on the surface of the pipeline cannot be wiped off. The effect of defrosting cannot be achieved; organic solvents are volatile, harmful to the human body, flammable, have potential safety hazards, and are expensive, so they are not suitable for repairing and replacing large sections of pipeline cold insulation structures
These methods can barely be used for partial repair of pipelines, but in terms of safety, reliability and economy, they cannot realize large-scale engineering applications at the receiving station site

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Assembly type blowing system special for online repair of cold insulation structure and suitable for various pipe diameters
  • Assembly type blowing system special for online repair of cold insulation structure and suitable for various pipe diameters
  • Assembly type blowing system special for online repair of cold insulation structure and suitable for various pipe diameters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] Below in conjunction with accompanying drawing, take the pipeline to be repaired of DN150 as example, the present invention will be further described.

[0045] like figure 1 As shown, the present invention provides a special purge system suitable for on-line repair of multi-diameter assembled flexible cold insulation structures, including purge tool 1, hose 2, nitrogen gas source 3 and other structures.

[0046] Wherein, the purging tool 1 includes a purging device 5 , an atomizing device 6 , a main control valve 7 , and a handle 8 . The purging device 5 includes 3 groups of purging assemblies 11 connected by short connection pipes 9 . In this embodiment, the distance between two adjacent groups of purge assemblies 11 is 200mm, and the number of purge assemblies can be appropriately increased or decreased according to the single repair length of the pipe section to be repaired.

[0047] like figure 2 As shown, each set of purging components 11 is an arc-shaped pipe ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an assembly type blowing system special for online repair of a cold insulation structure and suitable for various pipe diameters. The blowing system comprises a blowing tool. The blowing tool comprises a plurality of sets of blowing assemblies. Each set of blowing assembly comprises a circular-arc-shaped pipe fitting formed by a metal hose, wherein the circular-arc-shaped pipe fitting is provided with a plurality of diverters, braches of the diverters are connected with metal connection hoses correspondingly, and the other ends of the metal connection hoses are connected with blowing nozzles. After communicating, the multiple circular-arc-shaped pipe fittings communicate with a pipeline through a handle, and the pipeline communicates with an air source. The blowingsystem is easy and convenient to assemble, flexible in adjustment, convenient to control and suitable for to-be-repaired pipelines of various pipe diameters, operation convenience of the tool is improved, meanwhile, an integrated atomization device is arranged, an organic solvent is introduced, and thorough and fast defrosting and deicing are achieved in the blowing process. The blowing system isnot only suitable for LNG pipelines but also suitable for other low-temperature pipelines and devices and can be used and popularized in other low-temperature cryogenic fields.

Description

technical field [0001] The invention relates to a special purging system suitable for on-line repair of a multi-diameter assembled cold-preservation structure, which belongs to the field of low-temperature cryogenic technology. Background technique [0002] my country's LNG industry is developing rapidly. Many domestic LNG receiving stations that have been put into operation have damaged the cold insulation layers of LNG pipelines to varying degrees. Some equipment and pipelines have frost, icing, deformation, and cracking, which not only increases energy consumption, In addition, the corrosion of equipment and pipelines has increased, and it is urgent to repair and replace them. Scientific diagnosis and evaluation of the cold insulation performance of the LNG pipeline cold insulation layer, repair of the cold insulation structure on the existing basis, especially the online repair technology in the case of non-stop production is particularly critical. [0003] During the on...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F17D1/04F16L55/16B05B9/04B05B12/08B05B1/00
CPCB05B1/005B05B9/04B05B12/087F16L55/16F17D1/04
Inventor 杨玉霞付子航黄洁馨明红芳杨宏伟冯亮刘方张晨
Owner CNOOC GAS & POWER GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products