Double-ferrule type pipe joint of double-sealing and double-fastening support and using method thereof

Abstract

The invention relates to technology of ferrule type pipe joints, in particular to a double-ferrule type pipe joint of a double-sealing and double-fastening support and a using method thereof. The double-ferrule type pipe joint consists of a joint body, a front ferrule, a rear ferrule and a nut; the joint body is connected with the nut by screw thread; the front ferrule and the rear front ferrule are arranged between the joint body and the nut in turn; the surface of the rear ferrule is subjected to Cr-rich ion nitrizing treatment; and the inner surface of the nut is subjected to silver plating treatment. A pipe is inserted into the joint body, the nut is screwed down by a spanner, then the nut pushes the rear ferrule to move forwards, simultaneously the rear ferrule pushes the front ferrule forwards, an inner conical hole in the joint body inwards extrudes the front ferrule so that the front ferrule eliminates the clearance between the inside diameter thereof and the outside diameter of the pipe, and a double-insurance high-strength pressure-proof sealing structure of the double-sealing and double-fastening support is formed. The double-ferrule type pipe joint has the advantages of reliable sealing property, convenient use and good repeated assembly and disassembly properties, can greatly improve the connection strength of a pipeline system, and greatly reduce the mounting moment.

Description

Technical field [0001] The invention relates to the ferrule-type pipe joint technology, in particular to a double-insurance, high-strength, pressure-resistant double-ferrule pipe joint that works in oil, gas and general corrosive media and requires double sealing and double fastening support and its use method. Background technique [0002] Piping system is the carrier of various fluid media and is widely used in all walks of life. It not only plays an extremely important role in industrial and agricultural production, national defense and scientific research, but also is closely related to our daily life. With the development of various science and technology, the application range of the pipeline system is not only wider and wider, but also its connection methods are constantly increasing and updating, and the convenience of installation and construction of the pipeline system and the safety and reliability of the pipeline system are put forward. Higher requirements, resul...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the low connection strength of the existing double ferrule pipe joints, insufficient strength of the cutting edge of the rear ferrule or too high hardness of the cutting edge, resulting in cracking and peeling of the cutting edge, and poor sealing performance with the increase of load and ambient temperature, etc. Defects, the present invention provides a double-sealed, double-tightening support double ferrule pipe joint and its use method. This double ferrule pipe joint not only greatly improves the connection strength of the pipe joint, but also meets the On the premise that the cutting edge of the ferrule has strength, it is ensured that the cutting edge maintains good plasticity and toughness so as to avoid cracking and peeling off of the cutting edge of the ferrule, so that the sealing performance of the pipe joint is significantly improved, and the connection strength and connection strength of the piping system in a heating environment Significantly improved sealing performance

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