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Rotation-preventing cutting sleeve

A ferrule and anti-rotation technology, which is applied in the direction of sealing surface connection, pipe/pipe joint/pipe fitting, passing components, etc., can solve problems such as leakage, ferrule and steel pipe rotation, etc.

Inactive Publication Date: 2010-05-19
董明 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the ferrule and the steel pipe tend to rotate and leak under the action of external torque after the elbow is assembled on the ferrule joint, a resistance-rotation ferrule was invented. This ferrule retains the common ferrule In addition to all the advantages, the anti-rotation function between the ferrule and the steel pipe is added

Method used

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  • Rotation-preventing cutting sleeve
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  • Rotation-preventing cutting sleeve

Examples

Experimental program
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Embodiment Construction

[0010] exist figure 1 In the schematic diagram of the structure, the function of the ferrule cutting edge (1) is to embed the steel pipe when under pressure to play a sealing role. The angle of the cone surface (2) at the end of the ferrule is made to be 70 to 74 degrees, which is convenient for the cone surface of the ferrule to deform more easily when it is gradually squeezed by the rotation of the nut and the joint, so that the tooth-shaped internal spline (3) is embedded in the steel pipe, play a blocking role.

[0011] exist figure 2 In the schematic diagram of the implementation of the installation, the state of the ferrule is obviously different before and after the completion of the installation. When the nut (6) cooperates with the male thread on the outside of the joint body (7) interface, the cutting edge (1) of the ferrule is pressed and embedded The steel pipe (8) deforms the ferrule (5) and forms a surface contact seal with the inner tapered surface of the joi...

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PUM

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Abstract

The invention discloses a cutting sleeve, which can effectively lock the cutting sleeve and a pipe wall to prevent leakage caused by rotation and is applied to hydraulic pipelines. Dentiform internal splines of the same width are arranged at the tail part of the cutting sleeve and the cone angle of the tail part of the cutting sleeve is decreased. After a pipe joint provided with the rotation-preventing cutting sleeve is screwed, the cutting edge of the cutting sleeve is pressed to be embedded in a steel pipe so that the cutting sleeve is deformed to form surface contact sealing with a conical surface on the inner side of a port of the joint body, and the internal splines at the tail part of the cutting sleeve are also pressed to be embedded in the steel pipe to prevent rotation.

Description

technical field [0001] The invention relates to a ferrule-type pipe joint in hydraulic pipe fittings. This kind of anti-rotation ferrule can effectively lock the ferrule and the pipe wall, and solves the problem that the elbow is stuck due to external torque after the ferrule joint is assembled. The sleeve and the pipe are prone to rotation, causing leakage at the cutting edge of the ferrule. Background technique [0002] At present, the inner wall of the ordinary ferrule is smooth, and when it is installed and used, the ferrule is set on the interface end of the pipe to be connected and installed together with the pipe to be installed on the concave platform inside the interface of the joint body. The nut set on the connected pipe matches the external thread on the outside of the joint, presses the cutting edge of the ferrule to embed into the steel pipe and deforms the ferrule to form a surface contact seal with the inner tapered surface of the joint body interface. After...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L19/10
Inventor 董明
Owner 董明
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