Dual openable stopper for high-temperature and pressure pipeline blocking construction

Abstract

The invention includes stop ends and a driving member. The said ends are two strip-type circular arc plates and the said driving member consists of two tapered lock nuts. The tapered lock nuts are slide-jointed in the T-shape groove between the stop ends and the driving member via longitudinal oblique ribs fixed in side of the strip-type circular arc plates. The frame of the inventive plugging head is two semi-circles and its diameter is the same as the diameter in the pipeline opening. The frame can stand the high pressure in the pipeline because of no plastic deformation and rigid sealing and can select to change the surface sealant materials, such as rubber, lead, luminium, copper and so on, according to the claim for pressure and temperature in the construction pipeline.

Description

【Technical field】 [0001] The invention relates to the sealing construction technology of petroleum, chemical, natural gas and other transmission pipelines, in particular to a special component for the sealing construction of high-pressure and high-temperature pipelines, a double-opening sealing head. 【Background technique】 [0002] In the prior art, the single-open support rod cylinder type plugging head is generally used for the plugging construction of non-stop pipelines for pipelines with different media such as petroleum, chemical industry, and natural gas in use. At this time, the plug is connected with the pair of nuts by a plurality of support rods, and the skeleton is expanded by the rotation of the lead screw like an umbrella, and the rubber sealing layer is extruded to form a sealed state with the pipeline. This structure has some disadvantages such as: the skeleton must be plastically deformed when multiple support rods expand, and the required plastic deformation...

AI Technical Summary

Problems solved by technology

This structure has some disadvantages such as: the skeleton must be plastically deformed when multiple support rods expand, and the required plastic deformation limits the thickness and strength of the skeleton; the sealing layer can only use rubber sheets, which are larger than those used by rubber sheets. The expansion force required by the soft metal sealing layer cannot be completed due to the strength limitation of the support rod and the thin-walled skeleton; the rubber sheet seal cannot meet the sealing needs of high pressure, high temperature and different media, and the rubber sheet is often damaged due to local extrusion of the skeleton It cannot play the role of sealing layer; the support rod will also produce elastic deformation under the pressure inside the pipeline, which cannot meet the supporting force required for high-pressure pipeline sealing

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