Device for measuring heating mass loss rate of explosive powder

Abstract

The invention discloses a device for measuring the heating mass loss rate of explosive powder. The device comprises a drying box, wherein a through hole is formed in the bottom of the drying box; a measurement bracket is arranged in the through hole; a tray type balance is arranged on the measurement bracket; the measurement bracket comprises a heat insulation cover, an upper disk, a lower disk and a bracket rod; the upper disk is positioned in the drying box; the lower disk is positioned outside the drying box. Due to rod type connection, the mass of a grain or powder of the explosive powder in the drying box is directly measured; a process that a sample is taken out to be cooled is avoided; the weighing time is shortened; the adverse effects, which are caused by the change of the environment, on the sample are reduced; furthermore, the device is simple in structure and easy to operate, and the heat loss in the drying box in an aging process and a measuring process can be reduced; shaking during sample weighing is alleviated; the stability of a result is guaranteed.

Description

technical field [0001] The invention belongs to a device in the technical field of propellant and explosives, and in particular relates to a device for measuring the heating mass loss rate of propellant and explosive. The device can indirectly measure propellant and explosive powder column or powder through the opening at the bottom of the oven and the rod-shaped connection between the inside and outside. Heating mass loss rate. Background technique [0002] During the storage process of explosives, due to the generation and release of trace decomposition gases, the volatilization and sublimation of individual components, etc., the quality gradually decreases. The change of components and the escape of decomposition gas will change the energy performance, mechanical performance and ballistic performance of propellant and explosive. The heating mass loss rate reflects the physical or chemical changes of propellant products at a certain temperature. The monitoring of heating...

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Problems solved by technology

[0003] It can be seen that in the common method of weighing, the sample has to be taken out of the aging oven to cool down, which affects the continuity of the aging test. Due to the alternation of high and low temperatures and changes in environmental humidity, unexpected changes may occur in the sample, such as thermal expansion and cooling of the powder column. Cracks caused by shrinkage, combustion explosions and other dangerous accidents caused by sudden temperature changes

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