Multi-level seal hydraulic pipe ferrule

Abstract

The invention discloses a multi-level seal hydraulic pipe ferrule. The multi-level seal hydraulic pipe ferrule comprises a connector body, a hydraulic oil pipe and a nut, wherein the hydraulic oil pipe is sleeved with the connector body; an inner conical face connector is arranged at the connection end of the connector body and the hydraulic oil pipe; a movable groove is formed in the end, right facing the connector body, of the nut; a ferrule body is installed in the movable groove, the inner wall of the ferrule body is attached to the peripheral wall of the hydraulic oil pipe, the ferrule body is composed of a buffer portion and a sealing portion, the sealing portion extends into the inner conical face connector in the axis direction of the ferrule, and a first sealing face and a second sealing face form an annular space along with the hydraulic oil pipe. The first sealing face is tightly attached to the peripheral wall of the hydraulic oil pipe, the second sealing face and the peripheral wall of the hydraulic oil pipe keep an annular space, the inner wall of the body of the sealing portion is tightly attached to the peripheral wall of the hydraulic oil pipe, and the lateral wall of the buffer portion and the arc expansion portion on the outer wall of the buffer portion are tightly attached to the lateral wall of the movable groove respectively, so that air tightness of a ferrule assembly under high temperature and high pressure is ensured.

Description

technical field [0001] The invention relates to a hydraulic pipe, in particular to a multi-stage sealed hydraulic pipe ferrule. Background technique [0002] The traditional hydraulic pipe joint ferrule has only one sealing edge in structure, which belongs to the metal contact seal. Its function is to tighten the nut when the oil pipe and the pipe joint are assembled and connected, and squeeze the tapered surface of the taper hole of the hydraulic pipe joint body. The cutting edge of the hydraulic pipe joint ferrule cuts into the surface of the oil pipe to achieve a metal contact seal. If the nut is tightened excessively, it will cause the cutting edge of the hydraulic pipe joint ferrule to cut into the oil pipe excessively, resulting in the rupture of the hydraulic pipe joint ferrule; and the traditional The working pressure that the ferrule of the hydraulic pipe joint can bear does not exceed 40Mpa, and the rupture accident of the ferrule of the hydraulic pipe joint may oc...

AI Technical Summary

Problems solved by technology

[0002] The traditional hydraulic pipe joint ferrule has only one sealing edge in structure, which belongs to the metal contact seal. Its function is to tighten the nut when the oil pipe and the pipe joint are assembled and connected, and squeeze the tapered surface of the taper hole of the hydraulic pipe joint body. The cutting edge of the hydraulic pipe joint ferrule cuts into the surface of the oil pipe to achieve a metal contact seal. If the nut is tightened excessively, it will cause the cutting edge of the hydraulic pipe joint ferrule to cut into the oil pipe excessively, resulting in the rupture of the hydraulic pipe joint ferrule; and the traditional The working pressure that the ferrule of the hydraulic pipe joint can bear does not exceed 40Mpa, and the rupture of the ferrule of the hydraulic pipe joint may occur after exceeding

[0003] The traditional hydraulic pipe joint ferrule is easily deformed, cracked and leaked when the impact force and vibration intensity are high, the temperature is above 100°C, the vibration frequency is above 40Hz, the pressure is above 60Mpa, and the acid and mine working environment , the service life is short, and it cannot meet the working requirements of high-end hydraulic pipe joints in harsh environments where the pressure is above 60Mpa, acid, mine, temperature is above 100°C, and vibration frequency is above 40Hz.

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