A continuous tensile test device and method for cylindrical multi-sample in liquid helium temperature zone

Abstract

The invention belongs to a testing device and a method, and concretely relates to a cylindrical multi-sample continuous stretching testing device in a liquid helium temperature zone and the method. The testing device comprises an outer Dewar with a hollow cylindrical form, an inner Dewar with the hollow cylindrical form is arranged in the outer Dewar, a Dewar seal cover is arranged at the top of the outer Dewar, eight through holes are arranged on the Dewar seal cover; an external bile liquid conveying tube and an internal bile liquid conveying tube are arranged on a low-temperature stretching testing system, the internal bile liquid conveying tube passes through one through hole on the Dewar seal cover and is communicated with the space in the inner Dewar; an external bile exhaust pipe and an internal bile exhaust pipe are arranged on the low temperature stretching testing system, the external bile exhaust pipe passes through one through hole on the Dewar seal cover and is communicated with the space between inner Dewar and the outer Dewar, the internal bile exhaust pipe passes through one through hole on the Dewar seal cover and is communicated with the space in the inner Dewar; and an external bile liquid conveying tube control exhaust valve and a low-temperature exhaust main valve are arranged on the external bile exhaust pipe. The cylindrical multi-sample continuous stretching testing device in the liquid helium temperature zone and the method have the obvious effects that the efficiency is high, the liquid can be recovered, the waste is avoided, and the cost is saved.

Description

technical field [0001] The invention belongs to testing devices and methods, in particular to a cylindrical multi-sample continuous tensile testing device and method in a liquid helium temperature zone. Background technique [0002] High-quality low-temperature structural materials are widely used in cutting-edge science such as aerospace industry, superconducting technology, high-energy physics, controlled thermonuclear reaction and electronic technology. For these materials, the test of low-temperature mechanical properties is one of the essential steps. When performing liquid helium low-temperature mass testing of materials, such as using a single-sample low-temperature tensile testing mechanism for low-temperature testing of materials, the single-sample low-temperature tensile test consumes a lot of liquid helium, which increases the test cost and test efficiency. low. Contents of the invention [0003] The invention aims at the low efficiency defect of the existing l...

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Problems solved by technology

[0003] The invention aims at the low efficiency defect of the existing liquid helium single-sample stretching, and provides a high-efficiency liquid helium multi-sample low-temperature continuous stretching test system and testing method

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