High pressure sealing plug

Abstract

The invention discloses a high pressure sealing plug comprising an outer end face and an inner contact face. Sealing grooves are arranged below the part, close to the inner contact face, of a plug body, and internally provided with sealing rings, and the center position of the plug body is provided with a first groove which is internally provided with a first sealing auxiliary block. According tothe high pressure sealing plug with the sealing rings which are fastened firmly and are not liable to shift, the shortcomings that the sealing rings arranged on the sealing plug are liable to shift orslide and consequently the high pressure plug is failed are overcome. The center position of the plug body is provided with the first groove which is internally provided with the first sealing auxiliary block, and the expansion for the plug body can be achieved through the first auxiliary block by extrusion of the plug body after the plug body is installed in a hydraulic valve block; and the pressure between the plug body and the pipe wall of the hydraulic valve block is increased, thereby playing a role in fixation of the plug body.

Description

technical field [0001] The invention relates to the sealing field, in particular to a high-pressure sealing plug. Background technique [0002] At present, hydraulic valve blocks use a large number of process plugs due to processing technology requirements, such as steel ball plugs, conical screw plugs, ball expansion plugs, and gasket screw plugs. The above ball expansion plugs are optional, but the threaded plugs with flat sealing rings occupy a large space, and the threaded depth of the tapered screw plugs is unstable and prone to oil leakage. It is necessary to redesign a high-pressure sealing plug that occupies a small space. The head solves the process hole plugging requirements of the ultra-high pressure valve block, and under the existing high-pressure environment, the sealing ring set on the sealing plug is prone to translocation or sliding, which is the main reason for the failure of the high-pressure plug. Contents of the invention [0003] The technical proble...

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Problems solved by technology

[0002] At present, hydraulic valve blocks use a large number of process plugs due to processing technology requirements, such as steel ball plugs, conical screw plugs, ball expansion plugs, and gasket screw plugs. The above ball expansion plugs are optional, but the threaded plugs with flat sealing rings occupy a large space, and the threaded depth of the tapered screw plugs is unstable and prone to oil leakage. It is necessary to redesign a high-pressure sealing plug that occupies a small space. The head solves the plugging requirements of the process hole of the ultra-high pressure valve block, and under the existing high-pressure environment, the sealing ring set on the sealing plug is prone to translocation or sliding, which is the main reason for the failure of the high-pressure plug

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