Hydraulic pipe clamping cover with multi-stage seal function

Abstract

The invention discloses a multi-stage sealed hydraulic pipe ferrule, which includes a joint body, a hydraulic oil pipe and a nut. The joint body is sleeved on the hydraulic oil pipe. There is an active groove at the end of the cap opposite to the joint body. The ferrule is installed in the movable groove and its inner wall is attached to the outer peripheral wall of the hydraulic oil pipe. The ferrule is composed of a buffer part and a sealing part. The sealing part is along the axis of the ferrule. The direction extends toward the interface of the inner cone surface, and there is an annulus between the first sealing surface, the second sealing surface and the hydraulic oil pipe. The first sealing surface is in close contact with the outer peripheral wall of the hydraulic oil pipe, the annular space is maintained between the second sealing surface and the outer peripheral wall of the hydraulic oil pipe, the inner wall of the sealing part body is in close contact with the outer peripheral wall of the hydraulic oil pipe, and the side of the buffer The wall and the arc-shaped expansion part on the outer wall are closely attached to the side walls of the movable groove, so as to ensure the airtightness of the ferrule assembly under high temperature and high pressure conditions.

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] Traditional hydraulic pipe joint ferrules are 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 acidic 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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