Outward-pushing pressure-assisting type sealing ring

Abstract

The invention discloses an outward-pushing pressure-assisting type sealing ring, and belongs to the field of sealing rings. An inner ring is additionally arranged on the inner side of a traditional sealing ring, the front wall and the rear wall between an outer ring and the inner ring are sealed through sealing ring pieces, and a plurality of triggering blocks are annularly additionally arranged on the inner ring; the outer end of each trigger block is connected with an extrusion sheet connected with the two adjacent sealing guide pieces in a sealed mode, when the pressure intensity in the pipeline is increased, the sliding jacking plate is pushed to jack the elastic magnetic isolation layer outwards, the magnetic shielding effect of the elastic magnetic isolation layer on the ferromagnetic sheet is weakened after the elastic magnetic isolation layer is jacked and expanded, and at the moment, the ferromagnetic sheet is separated from the ferromagnetic sheet. The ferromagnetic sheets play an outward magnetic repulsive role on the magnetic jacking components, and after each magnetic jacking component extrudes the extrusion sheets corresponding to the magnetic jacking components one by one, the air pressure in each air cavity is increased, so that the sealing ring enhances the pressing force on a flange in a multi-point mode, and the sealing effect is improved under the condition that the air pressure of a pipeline is increased and weakened for many times alternately. And the pressing force of the sealing ring on the flange can be adjusted according to actual conditions, and the applicability is high.

Description

technical field [0001] The invention relates to the field of sealing rings, and more particularly, to an external push-assisting type sealing ring. Background technique [0002] The joints of the existing liquid transportation pipelines are generally connected by flanges. In order to prevent liquid leakage, sealing rings are installed inside the flanges. However, the existing sealing rings are generally installed manually by workers because of limited human strength. It is difficult to have a particularly large pressing force after installation, which may cause certain leakage during use. [0003] The pressing force of the existing sealing ring on the side wall of the flange is generally fixed after installation and will not change due to changes in the internal pressure of the pipeline, so the sealing effect of the low-pressure pipeline after installation may be good, but when When the delivery pressure of the low-pressure pipeline increases, the pressure of the sealing ri...

AI Technical Summary

Problems solved by technology

When the pressure inside the pipe becomes smaller, the slider will slide into the pipe again so that the compression force of the sealing ring on the flange is reduced, and the reaction between sodium peroxide and water is an irreversible reaction. After the reaction is completed, the subsequent sealing After the internal pressure of the sealing ring increases, it is difficult to play a good and continuous resistance to the external pressure of the sealing ring, and there are certain defects.

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