A kind of underwater flange with adjustable sealing force

Abstract

The invention relates to an underwater flange with adjustable sealing force. The underwater flange with adjustable sealing force consists of a shell system, an enclasping system and a sealing system,and is characterized in that the enclasping system is mounted on the left side of the inside of the shell system; the sealing system is mounted on the right side of the inside of the shell system; andthe inner surface of the enclasping system and the inner surface of the sealing system are in contact with pipes. According to the working principle, a nut is screwed to enable a fastening bolt to push a movable flange to move in the axial direction, the movable flange moves in the axial direction to push an enclasping ring to shrink in the radial direction, and the enclasping ring shrinks in theradial direction to enclasp a pipe; and a puller bolt is screwed to push the movable ring to move in the axial direction, the movable ring moves in the axial direction to compress a sealing ring, andafter the sealing ring is pressed and deforms, the pipe is sealed. Compared with the prior art, the underwater flange with the adjustable sealing force has the advantages that the radial enclasping force and the sealing force to the pipe can be adjusted independently, the flange is mounted on the underwater submarine pipe rapidly, rapid repair connection of the submarine pipe is realized, then, the submarine pipe repair period is shortened, the labor intensity is relived, and the comprehensive cost for ocean oil and gas delivery is reduced.

Description

technical field [0001] The invention relates to the technical field of emergency repair equipment for oil and gas submarine pipelines, in particular to an underwater flange with adjustable sealing force. Background technique [0002] With the shortage of land oil and gas resources, the world's coastal countries have successively explored and exploited offshore oil and gas resources, and the exploration and exploitation of offshore oil and gas resources has gradually become the main trend of the development of the oil and gas industry at home and abroad. In addition, as my country's economy continues to grow rapidly, insufficient supply of oil and gas resources will become the main contradiction hindering economic development. In order to increase the possession of oil and gas resources, offshore oil and gas exploration and exploitation have become the strategic focus of my country's sustainable energy development. [0003] Submarine pipelines undertake important tasks such a...

AI Technical Summary

Problems solved by technology

The medium sealing force of the above-mentioned device is determined by the pre-tightening force of the bolts, and the bolts not only need to radially hold the pipe tightly, but also realize the connection between the flange end covers, so the sealing force cannot be adjusted independently; If the bolt pre-tightening force is too small, the sealing force will be too small and the sealing force is insufficient to cause leakage. If the bolt pre-tightening force is too large, the service life of the sealing system will be reduced

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