An active elbow rotating structure

Abstract

The invention provides a movable elbow rotating structure, comprising a male end of the elbow body and a female end of the elbow body. The female end of the elbow body is provided with three inner trapezoidal slide grooves on a mating surface of the male end of the elbow body. The outer side wall of the male end of the elbow body is provided with outer trapezoidal slide grooves matched with the inner trapezoidal slide grooves in one-to-one correspondence. The outer trapezoidal slide grooves and the inner trapezoidal slide grooves cooperate one-to-one to form three annular chute spaces. The female end of the elbow body is respectively provided with three plug ports communicating with the three annular chute spaces, and the annular chute spaces are filled with a plurality of conical ring blocks arranged in a ring shape. Each conical ring block includes an outer annular surface slidably matched with the inner trapezoidal slide grooves, an inner annular surface slidably matched with the outer trapezoidal slide grooves, and two conical surfaces, a first conical surface and a second conical surface, connected between the outer annular surface and the inner annular surface. The movable elbow rotating structure can effectively save the cost of an elbow and prolong the service life of the movable elbow.

Description

technical field

[0001] The invention relates to a swivel elbow, in particular to a swivel elbow rotation structure. Background technique

[0002] In the sour working environment, the swivel elbow is mainly used for high-pressure discharge pipelines, input pipelines, well test pipelines or other high-pressure conditions to transport liquid flow, especially in the role of swivel elbows in cementing and fracturing operations. It is very important, and the existing swivel elbow rotating structure is basically a steel ball, and its disadvantages are as follows: firstly, the diameter of the steel ball is relatively large, so the outer diameter of the elbow will increase accordingly; secondly, the number of steel balls is large, so it is less Using installation and disassembly, the most important problem in the end is that when the swivel elbow is under high pressure, the steel ball is easily sheared without any buffer protection under high pressure.

[0003] Therefore, there is a...

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