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Testing device and method for deflagration to detonation transition

A combustion-to-detonation and testing device technology, which is applied in the direction of chemical analysis using combustion, can solve problems such as plug tripping and sample tube tearing, and achieves simplified structure, simple operation, improved test efficiency and reliable data. degree of effect

Inactive Publication Date: 2014-03-26
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the problems of plug tripping and sample tube tearing in existing methods

Method used

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  • Testing device and method for deflagration to detonation transition
  • Testing device and method for deflagration to detonation transition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] refer to figure 1 and figure 2 , The combustion-to-blast test device of this embodiment includes a sample tube 1, a verification plate 2 and a plug 3. The size of the sample tube 1 is 40 mm in diameter, 1200 mm in length, and 9 mm in wall thickness. Three testing holes 4 are opened on the wall of the sample tube 1, the axial distance between adjacent testing holes among the three timing holes 4 is 100mm, and the radial angle is 90°. The verification board 2 is welded on the sample tube 1 . The plug 3 is provided with a wire hole for installing the wire 6. The plug 3 and the sample tube 1 are connected by threads and fixed by a drill 4×M8 top wire 7. The thickness of the verification plate 2 is 10 mm. The axial distance between the test hole 4 close to the verification board 2 and the verification board 2 is 100 mm.

[0033] During the test, the test sample 5 can be freely filled or cast in the sample tube 1 .

Embodiment 2

[0035] Put 1.64 kg of small propellant pellets prepared by the pellet casting process into the body in four times. Black gunpowder 5g, electric ignition head, tighten the upper plug, connect the ionization probe, time interval recorder, and trigger the detonator synchronously, and the experimenters hide in a safe place to ignite.

[0036] The specific operation process is as follows:

[0037] (1) First, weld the verification plate to the lower end of the sample tube; the plug is connected to the sample tube by an internal thread, and equipped with a drill 4×M8 top wire;

[0038] (2) Put the test sample into the body, leave a space of 40mm from the nozzle, put the black powder bag inserted with the electric ignition head into this space, pass the wire of the electric ignition head through the wire hole of the plug, and then Screw the plug onto the sample tube, and tighten the 4×M8 top wire with drill;

[0039] (3) Insert the ionization probe into the time measuring hole and s...

Embodiment 3

[0044] The sample to be tested in this embodiment is: 0.995 kg of propellant pellets prepared by the screw press process, and the test method is carried out according to the steps in Example 1.

[0045] As a result, two groups of detonation velocity were obtained: 3203m / s and 3148m / s, the average detonation velocity was 3175.5m / s, the standard deviation was 27.5, the detonation velocity was stable; the verification plate had no perforation.

[0046] Utilize the method of national standard to test same sample at the same time, the result is that the sample tube is torn, and the witness plate has no obvious indentation, which is not convenient for judging whether combustion transfers to detonation, but with the method of the present invention, because of having a stable detonation velocity, although The detonation velocity is low, but it can still be judged that the transition from combustion to detonation has occurred.

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Abstract

The invention relates to a testing device and method for deflagration to detonation transition. The device comprises a sample tube, a verification plate and a plug, wherein the sample tube is used for containing a sample to be tested, the verification plate is fixedly installed at one end of the sample tube and used for packaging the sample and detecting whether a perforation is formed in the verification plate or not during combustion of the sample, and the plug is fixedly installed at the other end of the sample tube. The method comprises the steps that the sample is ignited for testing when the sample is packaged in the sample tube, and meanwhile, detonation velocities of the sample between adjacent test holes are tested to obtain at least two groups of detonation velocities; if the perforation is formed in the verification plate, it proves that the sample has the deflagration to detonation transition, or if the detonation velocity of the sample is stable, it proves that the sample has the deflagration to detonation transition, wherein the stability of the detonation velocity of the sample refers to that the standard deviation of at least two groups of detonation velocity values is not more than 35. The device is particularly applicable to deflagration to detonation transition tests of high-energy propellants. Compared with traditional testing methods and devices for the deflagration to detonation transition, the testing device and method have the advantages that two evaluation indicators, namely, the perforation and the stable detonation velocity are adopted, so that the testing efficiency and the data credibility are improved.

Description

technical field [0001] The invention belongs to the technical field of propellant and explosive testing, and relates to a combustion-to-detonation testing device and method. Background technique [0002] The research on the combustion-to-detonation transition of propellants and explosives has important application value for the storage and use of weapons and other charges. In the application of propellants and explosives, the transition from combustion to detonation should be utilized or prevented. Therefore, mastering the factors that affect the transition from combustion to detonation is very critical for the application of propellant and explosives. [0003] The National Standard of the People's Republic of China GB14372-1993 "Classification Test Methods and Criteria for Explosives Transported by Dangerous Goods" stipulates the equipment, methods and criteria for evaluating the combustion-to-detonation test of dangerous goods. In this regulation, the criterion for the o...

Claims

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Application Information

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IPC IPC(8): G01N31/12
Inventor 秦能张超陈松程扬波陈基苏杨马宁张亮
Owner XIAN MODERN CHEM RES INST
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