Butt flange metal sealing cover structure

Abstract

The invention relates to a butt flange metal sealing cover structure which is used for sealing a flange installed on a pipeline and comprises a main cover mechanism and an outer sealing mechanism, and the outer sealing mechanism is fixed to the outer side of the main cover mechanism and used for sealing the main cover mechanism. The main cover mechanism comprises a semicircular cover shell, and a bottom supporting plate, a rotating abutting plate, a lug block, a U-shaped clamping plate, a fixing bolt, a telescopic round rod and a rubber suction block which are located on the inner side of the semicircular cover shell. The main cover mechanism can carry out further sealing and partition protection on the flange and the connecting end of the pipeline, meanwhile, the main cover mechanism is fixedly connected with the flange through bolts used in cooperation with the flange, and therefore relative rotation of the main cover mechanism is effectively avoided. And the outer sealing mechanism is used for performing external sealing on the joint of the main cover mechanism and the pipeline. Compared with the prior art, further sealing and partition protection can be carried out on the flange and the connecting end of the pipeline, and the overall sealing effect and the connecting firmness between the pipelines are guaranteed.

Description

technical field [0001] The invention relates to the technical field of flange sealing, in particular to a metal sealing cover structure for butt flanges. Background technique [0002] Flange is also called flange flange plate or flange. Flange is the part that connects the shaft and the shaft. It is used for the connection between pipe ends. Flange connection is to connect two pipes, pipe fittings or equipment, respectively. It is fixed on a flange, and then fastened together by gaskets and bolts to complete the connection. [0003] Flange connection is an important and widely used connection method in pipeline engineering. Pay attention to tightness when connecting pipelines. Problems with tightness will lead to leakage of gaseous substances in the pipeline. It is often by improving the quality of gaskets and reducing bolts. The method of spacing to improve the sealing performance of the flange, but the effect obtained only by these two methods is not significant. Under th...

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Problems solved by technology

[0005] The sealing structure of the flange is provided with a groove to place the seal body, and multiple sealing rings are used to offset the groove to achieve sealing. This structure is inconvenient to operate and depends on the sealing performance of the sealing ring. The sealing ring is easy to wear, and the sealing performance and performance cannot be guaranteed. The firmness of the connection

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