Ultra-low temperature constant temperature grabbing bar device

Abstract

The invention discloses an ultra-low temperature constant temperature grabbing bar device, comprising a refrigeration system, a constant temperature system, a temperature measurement system and a grabbing system. The ultra-low temperature constant temperature grabbing bar device is characterized in that the refrigeration system is a Dewar flask with pressure; the constant temperature system consists of a constant temperature tank, a heating chip and a temperature controller; the temperature measurement system consists of a temperature sensor, a patrol detector and a computer; the grabbing system is a grabbing bar which is a metal hollow bar with an internal counter-flow heat exchange device, wherein the constant temperature tank is heated so that the liquid nitrogen in the constant temperature tank is gasified to obtain low-temperature nitrogen; the counter-flow heat exchange device in the grabbing bar makes the nitrogen flowing in subjected to counter-flow heat exchange so as to obtain an outer wall of the grabbing bar with uniform and constant temperature at any position; the temperature measurement system acquires and monitors the temperature values of the temperature measurement points of the outer wall of the grabbing bar in real time, so as to ensure that the temperature of the grabbing bar meets the technical requirement. The invention can provide the ultra-low temperature from room temperature to 130 DEG C below zero and the constant temperature (the temperature change of the bar is less than 2 DEG C and the temperature difference between the two ends of the bar isless than 3 DEG C) according to the test requirement, realizes the ultra-low temperature constant temperature grabbing bar and performs low-temperature resistance ability test on a pair of low-temperature protective gloves.

Description

(1) Technical field: [0001] The invention relates to an ultra-low temperature (-130 DEG C) constant temperature (temperature difference <3 DEG C) grip bar device for testing the low-temperature protection ability of gloves. (two) background technology: [0002] In the fields of aerospace, low-temperature superconductivity and liquid nitrogen refrigeration, it is often encountered that wearing gloves to grasp ultra-low temperature (-100°C) objects, such gloves must have good low-temperature protection capabilities. However, at present, there is no corresponding testing device for low-temperature protective gloves to evaluate its performance, especially the special ultra-low temperature grip bar with a test temperature lower than -100°C has not yet appeared. According to the test requirements, the present invention can provide ultra-low temperature constant temperature grip sticks from normal temperature to -130°C (the temperature change of the stick is <2°C, and the tem...

AI Technical Summary

Problems solved by technology

However, at present, there is no corresponding testing device for low-temperature protective gloves to evaluate its performance, especially the special ultra-low temperature grip bar with a test temperature lower than -100 ℃ has not yet appeared.

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