Thermocouple protecting device suitable for fireball response temperature testing in blast field

Abstract

The invention discloses a thermocouple protecting device suitable for fireball response temperature testing in a blast field. The thermocouple protecting device suitable for fireball response temperature testing in the blast field is mainly composed of a thermocouple, a protective shell, a microwave absorbing coating, a thermocouple installation hole, a wire trough and a fixing hole. The thermocouple protecting device suitable for fireball response temperature testing in the blast field is characterized in that the thermocouple is connected with the protective shell through the thermocouple installation hole, a thermocouple wire is arranged in a concave structure of the protective shell, a thermocouple signal line is lead out from the wire trough, the microwave absorbing coating is arranged on the internal wall surface of the concave structure of the protective shell, the device is fixed to an installation structure through the fixing hole, and the tail portion of the protective shell is right opposite to a blast center when the thermocouple protecting device is used. The thermocouple protecting device suitable for fireball response temperature testing in the blast field has the remarkable advantages that on the premise that the response time of a rapid response thermocouple resisting to transient high pressure is not influenced, the environmental adapting ability of the thermocouple is improved, the damage of high-speed fragments, high-pressure impact and explosion products to a thermocouple wire can be effectively resisted, and testing data can be obtained.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a thermocouple protection device, in particular to a thermocouple protection device suitable for testing fireball response temperature in an explosion field. Background technique [0002] Due to the explosive fireball formed after the explosion of explosives, the high-temperature gas products can cause different degrees of thermal damage effects on the target, and this thermal damage effect has become a research hotspot. The temperature of the explosive fireball is one of the important determinants of the thermal damage effect. Accurately obtaining the internal response temperature of the explosive explosion fireball and its temporal and spatial distribution is of great significance for the study of thermal damage. [0003] The method of measuring the response temperature is the thermocouple contact temperature measurement method. Since the explosion action time of th...

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Problems solved by technology

The shortcoming of the rapid response thermocouple disclosed in patent ZL201210286594.8 in the transient high-voltage environment of the explosion field is that the thermocouple wire has no protective device, and it is easily damaged by shell fragments, sand and high-voltage shock waves during the shooting range test; Obtaining an effective temperature measurement curve is difficult to meet the requirements of the fireball response temperature test in the explosion field

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