A kind of airbag pipeline sealing device

Abstract

The invention provides an air bag pipeline plugging device. The device comprises a supporting frame arranged at a closed opening mode, and a long handle installation tool which extends in the axial direction of a pipeline, an air bag assembly, an air source, a control valve set and an installation seat are installed on the supporting frame, the air bag assembly is provided with at least two air bags which are installed on the periphery of the supporting frame, the plurality of air bags are arranged in the axial direction of the pipeline, the air source is connected with an air nozzle of each air bag through an air supply pipeline, the control valve set is arranged on the air supply pipeline so as that the air source is enabled to independently inflate the air bags, and the end, close to the supporting frame, of the long handle installation tool is detachably connected with the installation seat. Under the condition that the single air bag is damaged, the pipeline can still be plugged and can work normally, so that the pipeline plugging effect and reliability are guaranteed; and the supporting frame can be conveniently conveyed into the pipeline through the connection between the long handle installation tool and the installation seat, the supporting frame can be fixed on the inner wall of the pipeline after the air bag are inflated, and the pipeline can be plugged, and therefore, the installation of the supporting frame is very convenient.

Description

technical field [0001] The invention relates to the field of pipeline sealing, in particular to an airbag pipeline sealing device. Background technique [0002] In nuclear power plants, during the operation of key equipment such as reactor pressure vessels and steam generators, they are in an environment of high temperature, high pressure and high radioactivity, and are also subjected to the impact of high-speed water flow. Therefore, the main equipment of key equipment such as reactor pressure vessels and steam generators Pipeline joint welds are prone to damage such as pitting corrosion, knife corrosion, and stress corrosion cracking. It is necessary to carry out underwater maintenance for the damage of main pipeline joint welds, and weld repair operations involve ultrasonic testing, welding, cutting, grinding and other processes , Foreign matter will be generated inside the pipeline, and the above-mentioned key equipment will also generate foreign matter during regular ma...

AI Technical Summary

Problems solved by technology

[0003] At present, domestic and foreign plugging devices for the main pipelines of key equipment such as reactor pressure vessels and steam generators in nuclear power plants usually use metal cover plates or individual airbags. Poor effect and low sealing reliability; at the same time, the installation process of the pipeline sealing device is complicated, and it takes a long time for the operator to operate, and the radiation dose received is large

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