Rotary type slow-baking safety test device

Abstract

The invention discloses a rotary type slow-baking safety test device. The main components of the device include a heat-insulation heating box, a temperature parameter control element, a power output control element and a frequency adjustment rotary table; the heat-insulation heating box is connected with the temperature parameter control element through a cable, and the device can achieve programmed temperature control in a wide range. The safety test device has the following advantages that temperature control precision is high, the maximum temperature difference in a temperature field is smaller than 1 DEG C, and the minimum heating rate can reach 2 DEG C / h; under the condition of high loading ratio (78%), a sample can be evenly heated, and the maximum temperature deviation is less than 2%; remote control is achieved and safety is good; operation is simple and cost is low. The rotary type slow-baking safety test device is suitable for safety assessment of energetic materials under the condition of programmed temperature control, and especially for slow-baking safety assessment of large-size energetic materials.

Description

technical field [0001] The invention belongs to a cook-off device for evaluating the safety of energetic materials, in particular to a cook-off device for evaluating the safety of multi-scale energetic materials. Background technique [0002] Energetic materials have the risk of self-accelerating thermal decomposition and burning under the action of external thermal stimulation. If the generated heat cannot be conducted away in time, it will cause internal heat accumulation of energetic materials and lead to an increase in temperature. As a result, thermal decomposition is further intensified and more heat is accumulated, which may eventually lead to combustion or explosion of energetic materials. [0003] Thermal decomposition characteristics are important indicators for evaluating the safety of energetic materials. The evaluation methods of thermal decomposition characteristics of energetic materials include differential thermal analysis (DTA), differential scanning calor...

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Problems solved by technology

Among them, US8297270 is a rapid heating system, which uses air as the heat transfer medium and has the characteristics of high heating rate; US7549375 is a safety device sensitive to temperature response, and the pressure relief position is made of special materials, which will melt at a specific temperature , to improve the safety of energetic materials; due to the high heating rate, neither of these two patents can meet the requirements of evaluating the response characteristics of energetic materials under slow heating conditions

Chinese patent CN2013780241459 discloses a heating device consisting of an adiabatic heating box, a housing, a temperature detection element, and a power cut-off element. Uneven distribution; Chinese patent CN201420311920 discloses a heating device including four parts of adiabatic heating box, guide rail, heating plate and feeding mechanism, which has the characteristics of high heating efficiency, short time, and can heat multiple groups of samples at the same time, but the The heating system is mainly used for the preparation of rock samples with a narrow temperature range

It can be seen that there are many kinds of heating devices at home and abroad, but they are mainly oriented towards the direction of rapid heating. For the heating system with slow heating rate, no relevant patents have been found so far.

Existing heating devices usually have the characteristics of simple structure, high heating efficiency, and fast heating rate, but they cannot meet the needs of safety assessment of energetic materials under slow heating conditions

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