Repairing method and repairing pipe structure for partially dug old pipeline with stainless lining

Repairing method and repairing pipe structure for partially dug old pipeline with stainless lining

CN
  • CN 1,207,506 C
  • Filed: 06/28/2002
  • Issued: 06/22/2005
  • Est. Priority Date: 06/28/2002
  • Status: Active Grant
First Claim
Patent Images

1. the stainless steel lining pipe restorative procedure of the old pipeline of a local excavation, at first to carry out segmentation according to above ground structure situation and liner scheme to being embedded in underground old pipeline, section length be several meters to hundreds of rice, dig the operation well in segmentation place, old pipeline (1-1) is opened the suitable length of being convenient to operate in the operation well, the inner wall surface of back segmentation cleaning and smooth old pipeline (1-1), and decontamination, it is characterized in that this method may further comprise the steps:

  • 1). the outside dimension of stainless steel lining pipe (1-2) equals or is approximately equal to the internal diameter size of old pipeline (1-1), and this stainless steel lining pipe (1-2) is made local wave concavity for undergauge;

    2). stainless steel lining pipe (1-2) is inserted in the old pipeline (1-1) through the operation well;

    3). utilize one of following method to finish the bloated footpath of stainless steel lining pipe (1-2), so that its outer surface is adjacent on the internal surface of old pipeline (1-1);

    A. the mechanical bloated footpath of method c. hydraulic pressure, the bloated footpath of method b. air pressure, the footpath method that expandsD. the bloated footpath of blast method e. leads to the bloated footpath of method f. vacuum, the bloated footpath of ball method at a high speedG. make up the bloated footpath of vacuum method;

    4). order is finished the connection between being connected of being welded to connect between every section stainless steel lining pipe (1-2), stainless steel lining pipe (1-2) and old pipeline (1-1) and the old pipeline (1-1) in the operation well;

    5). check the quality of connection of above-mentioned whole connection parts according to the rules.

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