Rubber resin double-layer composite in-situ curing method for pipeline repair

Abstract

The invention discloses a rubber resin double-layer composite in-situ curing method for pipeline repair. The technical solution key points are as follows: specifically, the method includes the following steps: S1, selecting vinyl resin and rubber for standby application; S2, uniformly pasting the vinyl resin onto the surface of a glass composite felt; S3, binding the coated glass composite felt inthe S2 by using an iron wire to the surface of a repair airbag; S4, binding the rubber in the S1 by using a plurality of iron wires to the exterior of the glass composite felt in the S3; S5, performing pre-inflation on the repair airbag; S6, performing guide by using a pipeline endoscope detection system, and sending the repair airbag to the position to be repaired of a pipeline to be repaired under the guidance of the pipeline endoscope detection system; and S7, performing inflation on the repair airbag in the S6 to a specified pressure, and maintaining pressure. The method reduces the pre-treatment requirements, and does not need to remove a thin weak and loose layer of a base layer or dry the pipeline, thereby greatly saving the construction costs and time costs.

Description

technical field [0001] The invention relates to the field of pipeline repair, in particular to a rubber resin double-layer composite in-situ curing method for pipeline repair. Background technique [0002] Urban municipal pipelines are the prerequisite for maintaining the normal operation of urban residents’ lives. They have become the blood vessels in the city. Due to the influence of engineering construction or other factors, pipelines are often damaged, and many damaged pipelines have various problems. It is very difficult to repair them. trouble. [0003] In the prior art, the point-like in-situ curing method is often used for pipeline repair. The main process of the point-like in-situ curing method is: engineering preparation; defect pretreatment; partial resin lining; site cleaning; CCTV inspection; closed water test; engineering acceptance and other steps. [0004] The main advantages of the point-like in-situ curing method are: 1. Polyester resin, epoxy resin or vi...

AI Technical Summary

Problems solved by technology

If the leakage defect to be repaired is above level 2, it is likely that the resin and the base layer will not adhere firmly during the repair, so the above-mentioned point-like in-situ curing method cannot be applied with water during repair. If the leakage defect is above level 2, it is very likely that the repair will fail;

[0007] 2. If the moisture content of the base layer exceeds 6%, even if it seems to be glued when it is repaired, under the action of soil pressure and water erosion, water will continue to penetrate to the interface between the base layer and the resin as time goes by, which will intensify the resin layer. In order to make the resin well combined with the base, the moisture content of the base should not be greater than 6%, but in actual construction, the environment in the pipeline and the time of water cut-off cannot meet the requirements for drying the base ;

[0008] 3. The strength of the cured resin is very high. If the weak and loose layer of the base of the pipeline to be repaired cannot be removed, the strength difference between the cured resin and the weak and loose layer of the base will be very large, and the two materials with a large difference in strength will start to stick together. It is very strong, but if it is deformed by water pressure or thermal expansion and contraction, the inconsistent linear contraction coefficient will lead to peeling off;

[0009] 4. The pretreatment requirements for the surface of the base to be repaired are relatively high. In addition to cleaning the surface pollutants, dust, debris, etc., the key point is to remove the weak and loose layer of the base, which is difficult for pipes with a diameter of less than 800mm.

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