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Measuring device for thermal explosion critical pressure of pyrotechnic powder column

A technology of critical pressure and measuring devices, which is applied in measuring devices, force/torque/work measuring instruments, material explosives, etc., can solve problems such as ignoring effects, and achieve the effect of reducing test costs and avoiding damage

Inactive Publication Date: 2017-04-12
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to make the test conditions as close as possible to the actual charging conditions of the propellant and explosives, the shaped propellant and explosive samples are usually put into the airtight body for thermal explosion tests, but at present this type of test only focuses on the temperature change inside the airtight body during the heating process , ignoring the influence of the internal pressure of the airtight projectile on the thermal explosion of the propellant

Method used

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  • Measuring device for thermal explosion critical pressure of pyrotechnic powder column
  • Measuring device for thermal explosion critical pressure of pyrotechnic powder column
  • Measuring device for thermal explosion critical pressure of pyrotechnic powder column

Examples

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Embodiment 1

[0015] refer to Figure 1 to Figure 5 , the present embodiment gives a specific structure, manufacturing and assembly example of a thermal explosion critical pressure measuring device for propellant and explosive grains. The thermal explosion critical pressure measuring device of propellant powder column at least includes a simulated burner bomb 1 , a conduit 2 , a gas nozzle 3 , an adapter 4 , a nut 5 , a pressure sensor 6 , a sealing ring 7 and a sealing ring 8 .

[0016] see figure 2 , the simulated burner bomb 1 is composed of a threaded end cap 1-1, a projectile body 1-2 and a threaded end cap with holes 1-3. The projectile 1-2 is made of stainless steel, with openings at both ends, external threads at the upper and lower ends, the thread height is 6mm-10mm, the outer diameter of the projectile 1-2 is 36mm-60mm, the inner diameter is 30mm-50mm, and the height is 30mm ~50mm; the threaded end cap 1-1 and the threaded end cap with holes 1-3 are made of stainless steel. Th...

Embodiment 2

[0023] This embodiment describes the measurement of the thermal explosion critical pressure of the AP powder column by using the thermal explosion critical pressure measurement device of the propellant column manufactured in Example 1.

[0024] In this example, the internal diameter of the simulated combustion bomb is 42mm, the external diameter is 48mm, the height is 42mm, the wall thickness of the upper and lower end caps is 4mm; the internal diameter of the gas conduit is 3mm, the external diameter is 5mm, and the length is 1000mm; the operating temperature range of the pressure sensor is -40°C ~160°C, the outer diameter of the interface thread is 20mm.

[0025] Weld the two ends of the conduit 2 with the gas nozzle 3 and the central through hole of the holed threaded end cap 1-3 of the mock-up bomb 1 in advance, and the weld seam is tightly sealed; the lower end of the mock-up bomb 1 is threaded 1-1 sealing, put the formed AP powder column with a size of Ф40×40mm into the ...

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Abstract

The invention discloses an explosive grain thermal explosion critical pressure measurement apparatus, for solving the problem of high-temperature pressure measurement of explosive grains under a thermal stimulus effect and providing a means for critical pressure measurement when the explosive grains explore under the thermal stimulus effect. The apparatus is mainly composed of a simulated cook-off bomb, a guide tube, an air tap, an adapter, a nut, a pressure sensor and sealing rings. The measurement apparatus measures the thermal explosion critical pressure of the explosive grains through the general pressure sensor by use of a guide tube gradient cooling method and can be applied to research on safety of the explosive grains under the thermal stimulus effect.

Description

technical field [0001] The invention belongs to the technical field of safety evaluation of propellants and explosives, and relates to a measuring device for the critical pressure of thermal explosion of propellant and explosive powder column. Background technique [0002] The safety research of explosives and other energetic materials under the action of thermal stimulation is an important aspect of the safety assessment of explosives. The methods commonly used to evaluate the thermal safety of explosives include differential scanning calorimetry, thermogravimetric method, and microcalorimetric method. Thermal analysis such as thermal method and thermal explosion test, etc. The experimental sample size of the thermal analysis method is small, which is suitable for the study of the mechanism, and has certain limitations for the evaluation of the thermal performance of the charge; while the sample of the thermal explosion test can be a larger-sized shaped charge, which can be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/00G01N25/54
Inventor 冯博王晓峰徐洪涛冯晓军田轩封雪松赵娟
Owner XIAN MODERN CHEM RES INST
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