FRP pipeline interface reinforcing method

Abstract

The invention specifically relates to an FRP pipeline interface reinforcing method comprising the steps: firstly, a bracket is arranged for fixing and supporting pipelines on both sides of interfaces and ensuring the coaxiality of the two interfaces, beveled edges are polished at the pipeline interfaces, the outer walls of the pipelines near the interfaces are uniformly polished, a gap remains between the two interfaces, and then lining resin is brushed at the interfaces and a layer of surface mat is laid at the interfaces; next, winding yarns enwind the surface mat in the circumferential direction and are tied tightly into the gap, the tension of a first layer of winding yarn is the largest, then the tensions of the following multiple layers of winding yarns are decreased gradually, after enwinding of the winding yarns is completed, the beveled edges are filled with a crushed chopped strand mat flatly, finally, the crushed chopped strand mats are laid in the circumferential direction, bubbles are expelled out by a levelling roll, and interfaces of all layers of the chopped strand mats are required to be kept off with each other during laying; and finally, curing is carried out at room temperature, and the FRP pipeline interface reinforcement is completed. A case that defect points are easily generated due to use of putty in the prior art can be avoided, the coaxiality of the two interfaces can be maintained, the gap of the two interfaces is uniform, leakage gaps are not easy to generate, and the interface overall strength is uniform.

Description

technical field [0001] The invention belongs to the technical field of pipe joints, and in particular relates to a method for reinforcing FRP pipe joints. Background technique [0002] FRP is a polymer epoxy resin as the substrate, FRP or carbon fiber Etc. is the reinforcement, the composite made by the composite process Material , the technology of FRP pipeline repair and interface is not very mature. At present, the reinforcement of FRP pipeline interface mainly adopts the putty reinforcement method, and the interface is first filled with putty and then strengthened. The viscosity of FRP is not good, and the putty is easy to crack. Due to the problems in the above reinforcement methods, it is necessary to improve the FRP pipeline reinforcement method. Contents of the invention [0003] The present invention overcomes the shortcomings and deficiencies of the prior art methods, and provides a method for reinforcing the interface of FRP pipelines, which can be adapted ...

AI Technical Summary

Problems solved by technology

[0002] FRP is a polymer epoxy resin as the substrate, FRP or carbon fiber Etc. is the reinforcement, the composite made by the composite process Material , the technology of FRP pipeline repair and interface is not very mature. At present, the reinforcement of FRP pipeline interface mainly adopts the putty reinforcement method, and the interface is first filled with putty and then strengthened. The viscosity of FRP is not good, and the putty is easy to crack. Due to the problems in the above reinforcement methods, it is necessary to improve the FRP pipeline reinforcement method