High-voltage electronic ignition circuit and oxygen bomb calorimeter

Abstract

The invention discloses a high-voltage electronic ignition circuit and an oxygen bomb calorimeter. The high-voltage electronic ignition circuit comprises a direct-current power supply, an ignition switch, a self-excited oscillation circuit, a high-voltage rectification energy storage circuit, an automatic discharge circuit and two ignition electrodes; the self-excited oscillation circuit comprises a triode and a first transformer, the high-voltage rectification energy storage circuit comprises an energy-storage capacitor, a diode and a second transformer, the automatic discharge circuit comprises a delay capacitor, a silicon controlled rectifier and a sliding rheostat, and the ignition electrodes are connected to the two ends of a secondary coil of the second transformer respectively. According to the technical scheme, the repeating utilization rate of an ignition device is increased, the success rate of ignition is increased, the manual operation process is reduced, and then the use experience of the user and the accuracy and efficiency of the determination experiment process are improved.

Description

technical field [0001] The invention relates to the technical field of electronic ignition, in particular to a high-voltage electronic ignition circuit and an oxygen bomb calorimeter. Background technique [0002] In related technologies, calorimeters are mainly used to measure the calorific value of solid and liquid fuels. The measurement principle of the oxygen bomb calorimeter is as follows: a certain amount of combustion heat standard substance benzoic acid burns in the oxygen bomb injected with sufficient oxygen in the calorimeter, and the heat released makes the whole calorimetric system (including the inner cylinder and the water in the inner cylinder) or other media, oxygen bombs, stirrers, thermometers, etc.) from the initial state temperature to the final state temperature, and then a certain amount of the substance to be tested is burned under the same conditions as above. When performing a measurement experiment, the substance to be tested is ignited by external...

AI Technical Summary

Problems solved by technology

[0005] 1. It is difficult to maintain good repeatability due to ignition heat

Whether it is the ignition wire fusing method or the cotton thread ignition method, the ignition material needs to be replaced each time, and each time the material is different in material, quality, combustion status, etc., it is difficult to ensure complete consistency, and it is easy to cause differences in ignition heat each time

[0006] 2. The ignition failure rate is high

For the above two ignition methods, when loading samples, it is necessary to adjust the distance between the ignition wire or cotton thread and the measured substance according to the difficulty of igniting the measured substance. If the influence of external force changes during the sampling process, it is easy to short-circuit the ignition wire or burn the ignited substance, but the measured substance does not ignite.

[0007] 3. Manual operation is cumbersome

For the above two ignition methods, each operation needs to go through steps such as bending, connecting, locking, and fixing, and each step needs to be cautious. If the action essentials of a certain step are not in place, it may cause ignition failure or sample scattering. Waiting status

And due to the habitual difference of human operation, there will also be differences in the ignition heat introduced by the ignition wire, which will affect the experimental results.

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