Self-adaptive adjustable wedge type eccentric fastening device

Abstract

The invention belongs to the technical field of oil and gas transmission pipes, and in particular, relates to a metal pipe fastening piece. A self-adaptive adjustable wedge type eccentric fastening device comprises an eccentric ring (1), an eccentric wedge key (2) and a check bolt. The self-adaptive adjustable wedge type eccentric fastening device directly mounts a to-be-fastened pipe / shaft without any processing, realizes nondestructive process, prevents the damage of such protection measures as corrosion resisting paint, prevents the defects of high local stress, high friction and easy corrosion caused by traditional wedge key wire matching, realizes size minimization, realizes single-process molding, can prevent the use of a split buckle type rotating shaft, can adapt to the installation in a limited space, and is far stronger than the split buckle under the same condition; the eccentric wedge key has certain self-adaptivity; under the conditions of corrosion of the fastened pipe / shaft or generation of such diameter errors as roughness due to coating of the corrosion resisting paint, the eccentric wedge key and the eccentric ring can realize the error compensation to reach higher self-adaptivity; and the self-adaptive adjustable wedge type eccentric fastening device is simpler in installation, capable of being replaced and strong in operability.

Description

Technical field [0001] The invention belongs to the technical field of oil and gas transportation pipelines, and particularly relates to a metal pipeline fastener. Background technique [0002] With the acceleration of the global industrial era, energy has become the key to the economic development of all countries in the world. As of the end of 2013, my country’s proven recoverable natural gas reserves were 3.1 trillion cubic meters, and my country’s technically recoverable shale gas was 1,115. Trillion cubic feet (tcf). The energy field has increasingly higher requirements for the technology and strength of transmission pipelines, while the development of oil and gas, high temperature, high pressure, corrosive and other extreme working conditions have also put forward higher requirements for the application of pipelines; therefore, for pipelines, especially metals The installation of fasteners and other accessories on the pipeline is an urgent problem to be solved. At present,...

AI Technical Summary

Problems solved by technology

Most of the current fastening methods require mechanical processing of metal pipes, which inevitably damages the physical surface integrity of the pipes. At the same time, it also has an irreversible destructive effect on its chemical corrosion resistance. Corrosion is particularly severe in highly corrosive environments such as high temperature, high pressure, and interface contamination, which may lead to perforation and even fracture

The few rotating shaft snaps that are fastened in a non-destructive way, due to the existence of rotating sets, the diameter of the rotating shaft directly occupies a large proportion of the space in the radial direction, which cannot be applied in working conditions with high space requirements

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