Nitrate explosive charge safety storage service life estimation method

A storage life, nitrate ester technology, applied in the direction of measuring devices, chemical analysis by titration, material analysis by optical means, etc., can solve the problem of uneven distribution of stabilizer content, uneven distribution of temperature field, combustion and explosion, etc. problems, to achieve the effect of solving the uneven distribution of low-content samples, overcoming the problems of preparation and proportioning, and avoiding the manufacturing process

Active Publication Date: 2017-01-04
XIAN MODERN CHEM RES INST
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Problems solved by technology

[0004] In the past, the thermally accelerated aging method was used to track the effective stabilizer content (GJB770B-2005 method 506.1 estimated storage life thermally accelerated aging method) to estimate the safe storage life of nitrate propellants and explosives, and the commonly used chemical titration method (bromine reacts with the stabilizer to form bromide The chemical method) or chromatographic method to determine the effective content of the stabilizer is a destructive detection method, and the effective content of the stabilizer of the pulverized sample is extracted by ether reflux for 24 hours or even longer. The low boiling point solvent ether is flammable and explosive. The preparation of ether extraction samples from aging samples of ester propellants and explosives is not safe, and the operation is cumbersome and time-consuming, and the bromide produced by chemical titration will cause pollution
[0005] According to the change law of effective stabilizer content of aging samples of nitrate propellants and explosives materials obtained at different temperatures, when using the Berthelot equation to estimate the safe storage life, due to the ther...

Method used

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  • Nitrate explosive charge safety storage service life estimation method
  • Nitrate explosive charge safety storage service life estimation method
  • Nitrate explosive charge safety storage service life estimation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Embodiment 1: Safe storage life of nitrate propellant charge

[0086] The typical three-base propellant SGF-1 is used as a representative for illustration.

[0087] (1) Preparation of near-infrared modeling samples with effective content of No. Ⅱ neutralizer by thermal accelerated aging method

[0088] A typical three-base propellant SGF-1 is packed into a capillary vent grinding-mouth reducing bottle (Φ=4cm, H=8cm) (semi-closed condition, figure 1 ) at 95°C for thermally accelerated aging, sampling every 4 hours, preparing three-base propellant samples with different stabilizer contents, and collecting 60 SGF-1 aging samples, 29 of which (numbered 1-29) were used as internal calibration sets , perform linear fitting and internal cross-validation, and 31 samples are used as an external validation set (numbered 30-60) for external validation.

[0089] (2) Near-infrared quantitative model of the effective content of No. Ⅱ medium-dosed agent

[0090] ① The devices used ...

Embodiment 2

[0117] Embodiment 2: safe storage life of nitrate propellant charge

[0118] The typical composite modified double-base propellant GST-1 is taken as a representative for illustration.

[0119] (1) Preparation of near-infrared modeling samples with effective content of compound stabilizer by thermal accelerated aging method

[0120] Typical composite modified double base propellant GST-1 drug cake sandwich structure sample (Φ=30mm, upper tablet 7H1=5mm, sandwich layer 8H2=10mm, lower tablet 9H3=5mm, image 3 ) into a ground-mouth reducing bottle with a capillary vent (semi-closed condition, figure 1 ) at 90°C for thermally accelerated aging, the sandwich layer 8 was taken every 2 hours to obtain composite modified double-base propellant samples with different stabilizer contents, and 60 GST-1 aging samples were collected, of which 29 samples (numbered 1- 29) As an internal calibration set, linear fitting and internal cross-validation are performed, and 31 samples are used as ...

Embodiment 3

[0160] Embodiment 3: safe storage life of nitrate ester explosive charge

[0161] The typical nitrate explosive NEP-1 is used as a representative for illustration.

[0162] (1) Modeling samples for the effective content of No. Ⅱ medium-fixing agent prepared by thermal accelerated aging method

[0163] Typical nitrate ester explosive NEP-1 drug cake sandwich structure sample (Φ=30mm, upper tablet 7H1=5mm, sandwich layer 8H2=10mm, lower tablet 9H3=5mm, image 3 ) into a ground-mouth reducing bottle with a capillary vent (semi-closed condition, figure 1 ) at 85°C for heat-accelerated aging, and the sandwich layer 8 was taken every 2.5 hours to obtain a total of 60 calibration set samples and external validation set samples with different effective contents of No. ) is used to model the internal calibration set samples, which participate in linear fitting and internal cross-validation, and 31 samples (numbered 30-60) are used as external validation sets for external validation. ...

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Abstract

The invention relates to a nitrate explosive charge safety storage service life estimation method. The method comprises the following steps of: preparing a stabilizer active content near-infrared quantification model sample, and establishing a stabilizer active content near-infrared quantification model; obtaining a stabilizer active content variation temperature coefficient by virtue of a heat acceleration aging test, and establishing a safety storage service life estimation equation; and using a consumption critical amount of the stabilizer active content as a critical criterion, tracking the stabilizer active content in the charging single temperature heat acceleration aging process by virtue of a near infrared method, obtaining a critical time when the active content reaches the consumption of the critical criterion, and estimating a safety storage service life of the nitrate explosive charge at the storage environment temperature by the safety storage service life estimation equation. The safety storage service life can be obtained by tracking the stabilizer active content at different aging time of one charge sample at one temperature by virtue of the near infrared method, the sample quantity is reduced by 96 percent, and safety and low cost can be realized.

Description

technical field [0001] The invention belongs to the technical field of propellant and explosive life evaluation, and relates to a method for predicting the safe storage life of propellant and explosive during storage. In particular, it uses near-infrared diffuse reflectance spectroscopy to detect the effective stabilizer content of nitrate propellants and explosives at a single temperature thermally accelerated aging sample, and obtains the critical time consumed by the effective stabilizer content to reach the critical criterion. According to the estimated safe storage life of the charge Equation, a method for estimating the safe storage life of nitrate propellants and explosives at storage ambient temperature. Background technique [0002] The safe storage life of propellants and explosives is the storage time before the propellant and explosives undergo autocatalytic accelerated decomposition under storage conditions. [0003] Nitrocellulose and nitroglycerin are the mai...

Claims

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Application Information

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IPC IPC(8): G01N21/359G01N21/3563G01N31/16G01N30/02
CPCG01N21/3563G01N21/359G01N30/02G01N31/16
Inventor 丁黎郑朝民周静刘文亮祝艳龙
Owner XIAN MODERN CHEM RES INST
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