A method for installing pressure testing devices at different depths under the impact of propellants and explosives
A technology of pressure testing and installation method, which is applied in the direction of fuel oil testing, blasting force measurement, material inspection products, etc. It can solve the problems that affect the measurement results, cannot guarantee the coaxial center of the parts, and is easy to dump, so as to avoid signal interference.
Active Publication Date: 2018-01-23
XIAN MODERN CHEM RES INST
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Problems solved by technology
[0003] (1) There are potential safety hazards in the test assembly. Detonators, boosters, plane wave generators, loaded grains, partitions, grains to be tested, sensors, etc. are simply superimposed together, and the contact surfaces can move freely. Easy to fall and dangerous;
[0004] (2) The sensor is not in close contact with the drug column to be tested, and there is an air gap, which affects the measurement result;
[0005] (3) The concentricity of the components cannot be guaranteed, especially if the sensitive part of the sensor is not in the center of the grain to be tested, the measurement result will be affected by the lateral sparse wave;
[0006] (4) The grounding of the measurement device makes it difficult to interpret the signal. When multi-channel measurement is performed in the same system, a strong interference signal will be generated after the sensor is damaged by the lateral sparse wave, and the "common ground" output of the pulse constant current source causes mutual If the interference is serious, there will be error signals such as signal leading edge deterioration, abnormal amplitude and reverse polarity
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Embodiment 1
[0040] This embodiment is the installation method of the pressure test device at different depths under the impact of GUHL-2 explosives. The powder columns 9 to be tested are three GUHL-2 tablets with thicknesses of 7.06mm, 5.28mm and 2.70mm, stacked from top to bottom A manganese-copper piezoresistive sensor 8 is embedded between every two tablets, and its assembly method includes the following steps:
[0041] 1) Use a 10x magnifying glass to check whether there are bubbles, impurities and damage in the manganese-copper piezoresistive sensor 8 in the insulated package. If it is unqualified, it should be replaced in time;
[0042] 2) Use 2000-mesh metallographic sandpaper to polish the surface of the drug column 9 to be tested, and then clamp the absorbent cotton with tweezers to wipe the surface of the drug column 9 to be tested;
[0043] 3) The screw rod 10 passes through the threaded hole of the lower fixing plate 11, and the bottom is fixed with nuts 12, and the nuts 12 at...
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Abstract
The invention discloses a method for installing pressure testing devices at different depths under the impact of explosives. In the method, each component of the test is fixed with a test bracket to ensure the reliable positioning of each component. Plates, loaded charges, plane wave generators, and boosters are placed between the lower and upper fixing plates in order from bottom to top, and tightened and fixed by screws and nuts so that there is no air gap between the components. This method is suitable for the installation of pressure test devices at different depths under the impact of various propellants and explosives, and reliably fixes and positions each component to ensure the accuracy of test and measurement results.
Description
technical field [0001] The invention belongs to the technical field of explosives, and in particular relates to a method for installing pressure testing devices at different depths under the impact of explosives. The method realizes reliable positioning of test components in a cheap and simple manner. Background technique [0002] Studying the shock initiation and detonation growth process of propellant and explosive has important guiding significance for the safety, reliability and formula design of propellant and explosive. The whole process of explosives from low-pressure shock initiation to steady-state detonation belongs to the category of detonation dynamics and is an important direction in the field of detonation, and the pressure measurement of explosives at different depths under impact is the main method of this research . At present, there is no relevant standard test device and installation method for pressure measurement at different depths under the impact of ...
Claims
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IPC IPC(8): G01L5/14G01N33/22
Inventor 赵娟王晓峰冯博田轩徐洪涛封雪松冯晓军
Owner XIAN MODERN CHEM RES INST