Title:
PRE-TIGHTENING FORCE REPAIRING METHOD, REPAIRING METHOD INVOLVING COMBINATION OF PRE-TIGHTENING FORCE AND CLAMP, AND REPAIRED PIPELINE
Document Type and Number:
WIPO Patent Application WO/2021/032140
Kind Code:
A1
Abstract:
Disclosed are a pre-tightening force repairing method, a repairing method involving a combination of a pre-tightening force and a clamp, and a repaired pipeline. The repairing method involving a combination of a pre-tightening force and a clamp comprises the following steps: (a) fixing part of a fiber material to a pipeline; (b) applying a pre-tightening force to the fiber material, winding multiple layers of the fiber material around the pipeline under the action of the pre-tightening force so as to cover a part, needing to be repaired, of the pipeline, and coating or impregnating the fiber material with an infiltrative adhesive during the winding of each layer of the fiber material so as to form a multi-layer fiber composite material (3); (c) in the state of applying the pre-tightening force, completing the curing of the multi-layer fiber composite material (3); and (d) mounting a clamp outside a repairing part of the fiber composite material (3), to which the pre-tightening force has been applied, and pouring a curable polymer into a gap formed between the clamp and the pipeline. The magnitude of the pre-tightening force is designed to overcome the situation whereby a fiber composite material layer comes unstuck from the pipeline due to the radial shrinkage of the pipeline caused by a decrease in internal pressure and/or the axial stretching of the pipeline after the pipeline, which is under pressure, is repaired.
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| WO/2023/165136 | SELF-ADAPTIVE PLUGGING DEVICE FOR MULTI-HOLE PIPELINE LEAKAGE |
| WO/2021/173875 | REPAIR SYSTEM AND METHOD |
| WO/2022/191810 | PIPE COUPLING |
Inventors:
LU MINXU (CN)
YANG YANG (CN)
HOU SHIYING (CN)
TIAN XIAO (CN)
GAO RONGZHAO (CN)
YANG YANG (CN)
HOU SHIYING (CN)
TIAN XIAO (CN)
GAO RONGZHAO (CN)
Application Number:
PCT/CN2020/110121
Publication Date:
February 25, 2021
Filing Date:
August 20, 2020
Export Citation:
Assignee:
BEIJING SAFETECH PIPELINE CO LTD (CN)
International Classes:
F16L55/17
Foreign References:
| CN1120143A | 1996-04-10 | |||
| CN101204770A | 2008-06-25 | |||
| CN105090676A | 2015-11-25 | |||
| CN101680591A | 2010-03-24 | |||
| CN110486568A | 2019-11-22 | |||
| CN1853847A | 2006-11-01 | |||
| CN1616546A | 2005-05-18 | |||
| JP2014114818A | 2014-06-26 | |||
| JP2000055288A | 2000-02-22 | |||
| US20180266613A1 | 2018-09-20 |
Other References:
吴佳琦 (WU, JIAQI): "压力管道缺陷的碳纤维复合材料修复补强技术研究 (Technology Research of Using Carbon Fiber Reinforced Plastics to Repair Pressure Pipe Containing Defects)", 中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑 (CHINESE MASTER’S THESES FULL-TEXT DATABASE, ENGINEERING SCIENCE AND TECHNOLOGY I), no. 05, 15 May 2015 (2015-05-15), ISSN: 1674-0246, DOI: 20201109081631Y
吴佳琦 (WU, JIAQI): "压力管道缺陷的碳纤维复合材料修复补强技术研究 (Technology Research of Using Carbon Fiber Reinforced Plastics to Repair Pressure Pipe Containing Defects)", 中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑 (CHINESE MASTER’S THESES FULL-TEXT DATABASE, ENGINEERING SCIENCE AND TECHNOLOGY I), no. 05, 15 May 2015 (2015-05-15), ISSN: 1674-0246, DOI: 20201109143229X
吴佳琦 (WU, JIAQI): "压力管道缺陷的碳纤维复合材料修复补强技术研究 (Technology Research of Using Carbon Fiber Reinforced Plastics to Repair Pressure Pipe Containing Defects)", 中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑 (CHINESE MASTER’S THESES FULL-TEXT DATABASE, ENGINEERING SCIENCE AND TECHNOLOGY I), no. 05, 15 May 2015 (2015-05-15), ISSN: 1674-0246, DOI: 20201109143229X
Attorney, Agent or Firm:
LIU, SHEN & ASSOCIATES (CN)
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