A boron powder combustion calorific value testing device

Abstract

The invention discloses a boron powder combustion heat value testing device. The device comprises a bomb body, a bomb head, a crucible, a crucible cover and conducting posts, wherein the crucible is fixed on a crucible frame in the bomb body; the bomb head is arranged on the bomb body; a vent pipe is arranged at the middle part of the bomb head, and is communicated with the interior of the bomb body; a thimble type gas valve is arranged on the vent pipe; the two conducting posts are ignition electrodes; small holes are formed in the conducting posts; conducting ferrules are arranged on the upper parts of the conducting posts; the two ends of an ignition fuse are inserted into the small holes in the conducting posts respectively, and are fixedly connected with the conducting posts through the conducting ferrules; the crucible cover is positioned on the crucible; two step holes embedded with ceramic plates are formed in the crucible cover, and are used for allowing the ignition fuse to be inserted; two rows of guide holes are circumferentially formed in the middle part of the wall of the crucible, so that burning on an oxygen bomb part by boron powder with a high combustion heat value can be prevented; the volume of the crucible is increased, so that sufficient oxygen can be ensured to participate in combustion; the step holes are formed in the crucible cover to balance the internal and external pressure of the crucible. The testing device is particularly applied to the testing of a combustion heat value of a boron fuel, and is also applied to the testing of combustion heating values of a solid propellant, coal and a petroleum substance.

Description

technical field [0001] The invention relates to a test device for the calorific value of combustion of a sample, in particular to a test device for the calorific value of combustion of boron powder. Background technique [0002] In the prior art, oxygen bomb calorimeters are often used in instruments for measuring the calorific value of substances, in which the sample combustion chamber is usually referred to as an oxygen bomb (such as figure 1 ), the volume of the oxygen bomb is about 300mL, the weight is about 2.5kg, and it has been tested by 20MPa water pressure. The warhead and body are made of heat-resistant and corrosion-resistant nickel-chromium alloy steel, which has good electrical and thermal conductivity. The top of the oxygen bomb adopts a thimble-type self-sealing air valve. The air vent doubles as an ignition electrode, and the warhead doubles as another ignition electrode, and the two electrodes are separated by an insulating material. The two ends of the ig...

AI Technical Summary

Problems solved by technology

[0005] In order to avoid the deficiencies of the existing technology, overcome the incomplete combustion problems caused by the ablation of the crucible, crucible frame, and crucible cover parts of the oxygen bomb and the boron particles splashing on the inner wall of the oxygen bomb when the combustion calorific value of boron powder is tested; The present invention proposes a boron powder combustion calorific value testing device

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