Tool used for connecting pipelines under pressure and use method

Abstract

The invention discloses a tool used for connecting pipelines under pressure and a use method thereof. The tool comprises two parts, i.e. trepanning equipment and a main pipeline welding adapter tube part, wherein the trepanning equipment comprises a drill rod, a drill, a knife set, a main body which performs a supporting function, a wrench, a pull rod, a top plate, a copper tile, a gland nut, a sealing ring, a lead screw and a wrench handle, the drill and the knife set are arranged on the top of the drill rod, and the wrench is arranged on the tail part of the drill rod; the main pipeline welding adapter tube part comprises an adapter tube which is provided with a valve, and a flange and a gasket are arranged between the valve and the adapter tube. According to the tool used for connecting the pipelines under the pressure and the use method, main pipeline media can be continuously conveyed without lowering pressure, spreading, purging, replacement and the like are omitted, and branch pipelines are connected under the condition of the normal operation of production. The technology has the advantages of convenience, quickness, safety, reliability, low construction cost, low labor intensity, high technical character, environment protection and energy saving and does not affect normal production, and therefore, careful arrangement is required in an operation process.

Description

technical field [0001] The invention relates to an interface device for connecting a pipeline to a main line and a method of use, more specifically, the invention relates to a device for opening holes with pressure on-line and a method of use. Background technique [0002] At present, the country attaches great importance to energy conservation and emission reduction, especially the rational use of water, gas and other process pipelines in steel plants. Especially the use of blast furnace gas, so the pipeline is often rebuilt and expanded, and the joint work of gas, natural gas and other pipelines is often carried out in the maintenance project. The old method is usually to shut down the blast furnace, close the main blind plate valve of the gas pipeline, purge the pipeline with nitrogen, and open the holes and contacts after passing the inspection of each emission point, and then replace the gas supply, which not only affects normal production but also has nitrogen suffocat...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the present invention provides a tool for pipeline connection under pressure and a method of use, which overcomes the problems in the prior art that the joints of the pipeline affect normal production and have potential safety hazards

Images