Thin tube dedicated fixture under action of axial and internal pressure composite load

Abstract

A thin tube dedicated fixture under action of an axial and internal pressure composite load includes a front clamping mechanism and a rear clamping mechanism; the front clamping mechanism is connected with a detected thin-walled circular pipe through a front flange and is used for clamping a front port of the detected thin-walled circular pipe and introducing hydraulic oil or air pressure to the detected thin-walled circular pipe; the rear clamping mechanism is connected with the detected thin-walled circular pipe through a rear flange and is used for clamping a rear port of the detected thin-walled circular pipe and ensuring that a hydraulic oil outlet end of the detected thin-walled circular pipe is sealed in a testing state. A flange fastening structure more convenient to dismount, mount and replace is used for replacing, so the fixture has the advantages of more reasonable design, simple assembly structure, and easy testing and operation, avoids influence of welded joint crack damage, nonperpendicularity and other factors in an experimental process, prevents pulling and disengaging, and has large deadweight range. The fixture has good sealing, does not need to consider potential risks brought due to the leakage of hydraulic oil. The whole fixture assembly structure stability is extremely strong, and an ideal effect is obtained through multiple times of experimental verifications.

Description

technical field [0001] The invention relates to a special clamp. In particular, it relates to a special fixture for thin tubes under the combined axial and internal pressure loads, which is used for the multiaxial mechanical performance research of thin tube samples under the combined axial and internal pressure loads. Background technique [0002] With the increasing pressure of environmental pollution and resource shortage, the field of nuclear power has been favored by countries all over the world and has been vigorously developed due to its advantages of cleanliness, energy saving and sustainability. Domestically, according to the Air Pollution Action Prevention and Control Plan issued by the State Council in September 2013, it is estimated that by the end of 2017, the installed capacity of domestic nuclear power plants will reach 50 million kilowatts, and the field of nuclear power will be unprecedentedly applied in China. Inside the nuclear reactor, the fuel cladding ...

AI Technical Summary

Problems solved by technology

However, the clamping method cannot withstand excessive load due to the axial tension of its own threaded fastening structure, which limits the richness of the test program

Images