Composite structure sealing plug for pipeline

Abstract

The invention discloses a composite structure sealing plug for a pipe. The composite structure sealing plug comprises a rubber sealing part and a rubber end cover part manufactured as a whole; and multiple annular flanges matched with pipe ports are arranged on the outer peripheral wall of the rubber sealing part. The composite structure sealing plug further comprises metal skeletons for supporting the rubber sealing part and the rubber end cover parts; the metal skeletons are positioned in the rubber sealing part and the rubber end cover part; the left end of the rubber sealing part and the right end of the rubber end cover part are both inwards recessed to form grooves; annular grooves are formed in the connected end surfaces of the rubber end cover part and the rubber sealing part; the rubber end cover part is connected with a metal chain connecting ring; multiple annular projections are arranged on the metal skeletons on the right sides of the annular flanges; annular mounting grooves for placing rubber sealing rings are formed between the adjacent annular projections; and the rubber sealing rings are in interference fit with the annular mounting grooves in the radial direction. Under the condition of satisfying the sealing performance, the composite structure sealing plug can effectively save the use level of materials to prevent wear and scratch of the inner wall of the pipe, and is convenient for installation and disassembly and longer in service life.

Description

technical field [0001] The invention relates to a pipe plug, in particular to a composite structure sealing plug for a pipe used for sealing the end of a pipe so as to prevent the inner cavity wall from rusting and the internal residual medium from leaking out. Background technique [0002] At present, sealing plugs are widely used in daily life and industrial production. The structural forms of sealing plugs are various, and the types of materials used for sealing plugs are also extremely wide. In the development of society, sealing plugs play an important role in the development of all walks of life. played an important role. In the metallurgical industry, sealing plugs are widely used in various pipe ends, container inlets and outlets and other parts. The materials used for sealing plugs include metal, plastic, rubber and other materials. The sealing plugs play the role of isolating gas and sealing fluid. [0003] The end of the large-diameter steel pipe needs to be inst...

AI Technical Summary

Problems solved by technology

[0004] Due to the large caliber of the steel pipe, the sealing plug made of metal not only has poor sealing effect, but also the two metals will be worn for a long time, and will further increase the inner diameter of the pipe, which is not conducive to protecting the pipe and saving materials; the sealing plug made of plastic is used Plug, the advantage is that it uses less material and is easier to produce and shape, but it wears faster and the sealing effect is not good. After a period of use, the plastic is prone to deformation in whole or in part, resulting in a short service life. Some are designed as threaded plugs. Plastic sealing cover, in the process of use, the installation and disassembly of the threaded sealing cover takes a long time, and it is easy to break during the operation, and technical operators are reluctant to use this structure; the pure rubber material with flange structure The disadvantages of the sealing plug are: after the flange is worn, the service life is short, and when the diameter is large, the stability of its own structure is poor, the amount of rubber is large, and it is inconvenient for personnel to load and unload.

Images