Domino clamp assembly for pipeline leakage maintenance and clamp comprising same

Abstract

The invention discloses a domino clamp assembly used for pipeline leakage maintenance and a clamp comprising the domino clamp assembly, and belongs to the field of pipeline reinforcement. The domino clamp assembly is a semi-annular piece, the semi-annular piece comprises a semi-annular body, one end face of the semi-annular body is provided with a semi-annular protrusion extending outwards in the axial direction, the other end face of the semi-annular body is provided with a semi-annular inwards-concave groove which can be matched with the protrusion in a concave-convex manner, and the semi-annular body is further provided with an axial bolt hole. The clamp is a combined emergency repair clamp, a modularized semi-annular assembly is adopted, and any interchangeability is achieved. The clamp is applied to reinforcement of a pipeline with the residual wall thickness of less than 30% and pipeline leakage sites, and is further development of a non-welding pipeline repair technology.

Description

technical field [0001] The invention relates to the field of pipeline reinforcement, in particular to a domino clamp assembly for maintenance of pipeline leakage and a clamp comprising the same. Background technique [0002] Long-distance natural gas pipelines are generally under high pressure. Once a leak occurs, it may cause a major safety accident. Common defect repair techniques include welding, fixtures and fiber composite materials. Welding types: surfacing, patching, and sleeves. Fixture type: fixture, fixture injection epoxy. Types of fiber composites: glass fiber composite repair, carbon fiber composite repair. [0003] At home and abroad, when the remaining wall thickness of the pipeline is more than 50%, two non-welding reinforcement techniques are usually used, that is, steel casing fixtures are injected with epoxy resin and carbon fiber reinforcement. These two methods have the characteristics of simple and safe construction, strong operability and permanence....

AI Technical Summary

Problems solved by technology

At present, domestic carbon fiber sheets are made of imported pretreated carbon fiber filaments. The quality of the sheets depends on foreign manufacturers and prices. Therefore, most domestic carbon fiber sheets cannot meet the technical requirements for pipeline reinforcement; carbon fibers are modified with impregnated glue. For epoxy resin adhesives, the main ingredients in the formula basically rely on imports, and domestic adhesive manufacturers make various combinations. The main ingredients are generally selected from American Gas Company or German BASF; the curing agent is all imported.

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