RU2315025C1 - METHOD OF PROCESSING OVERDUE GUN POWDERS OF VUOPYL AND VTM MARKS FOR EQUIPPING HUNTING CARTRIDGES HAVING CALIBERS 7,62×39 AND 7,62×54, AS WELL AS 7,62 mm CARTRIDGES FOR RIFLES 57-N-323S - Google Patents

Abstract

FIELD: explosives.

SUBSTANCE: invention relates to pyroxylin retarded gun powders. Preparation thereof for cartridges of indicated calibers comprises treatment of surfaces powder elements with alcohol-camphor solution used in amounts from 0.0012063 to 0.00139 L/min·kg for 20-28 min and then in a drum for 60-120 min now with graphite added in amount 0.1-0.3% of the weight of powder.

EFFECT: enabled use of overdue gun powders in due destination.

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Description

The invention relates to the field of pyroxylin phlegmatized gunpowder for small arms.

The manufacture of gunpowders of these grades is currently carried out according to batch technology using fresh pyroxylin as raw material. The method is multi-stage, time-consuming, requires high costs for raw materials and solvent and significant financial investments.

Currently, a significant amount of gunpowder is released due to the expiration of the warranty shelf life.

There is a need to utilize them by burning, which worsens the environmental situation in the region, or use them as raw materials for the production of gunpowder using standard technology. It is most advisable to use the released powder as a semi-finished product in which the basic properties of the target product are already formed, and it is possible to use them for their intended purpose.

The well-known "Method of processing pyroxylin powders into hunting gunpowder under a shot cartridge" according to patent No. 2105743 of 02.27.98. According to this method, the powder is subjected to grinding in an aqueous medium, and then the powder crumbs are dried, fractionated and the physicochemical characteristics are averaged by mixing. This method can be used only in the case of processing obsolete coarse-grained and tubular powders.

The closest in technical essence is the "Method of producing pyroxylin porous powder for cartridges for small arms" according to patent No. 2165402 from 04/20/01 (prototype). According to this method, the porous structure of the powder elements is created by treating the surface of the powder elements in an aqueous solution of acetone with a concentration of 30-70 vol.% For 10-240 minutes with stirring, followed by removal of acetone from the powder element by distillation. However, this method can only be used to obtain porous powders.

The objective of the present invention is the use of dense gunpowder grades VU _opyl and VTM with expired storage period for equipping hunting cartridges of caliber 7.62 × 39 and 7.62 × 54 and 7.62 mm cartridges for small arms ind. 57-H-323 s.

It is possible to implement this technical solution by treating (phlegmatization) with an alcohol-camphor solution of the surface of VU _polyl and VTM gunpowders with a specific flow rate in the range of 0.0012063 (l / min) / kg-0.00139 (l / min) / kg for 20-28 minutes and subsequent processing in a drum for 60-120 minutes with the addition of graphite in an amount of 0.1-0.3% by weight of gunpowder.

The specific consumption rate of the phlegmatizing solution is established empirically on the basis that all alcohol-camphor solution supplied to the surface of the powder has time to diffuse deep into the powder grains, and not accumulate on the surface of the powder.

The development of the optimal amount of camphor introduced for the phlegmatization of gunpowder grades VU _polyl and VTM was carried out by manufacturing prototypes on a 5-kg drum under experimental production conditions.

Process description

Powder in the amount of 5 kg is loaded into the phlegmatization drum. The temperature of the working room is maintained in the range of 30 ± 2 ° C. The dispenser is adjusted to the required pouring alcohol-camphor solution.

Then the drum is started and the alcohol-camphor solution is dosed with a specific flow rate (0.0012063-0.00139) (l / min) / kg for 20-28 minutes. At the same time, during the pouring process, graphite is dosed in an amount of 0.1-0.3% by weight of the product and subsequent processing of the product for 60-120 minutes. During this operation, the product is treated with a solution of a phlegmatizer and polished, after which the drum stops, the product is unloaded and dried at a temperature of 54 ± 2 ° C for 4 hours.

Samples are taken from the finished product to determine the physicochemical and ballistic characteristics.

Table 1 The sequence of operations, modes and examples of the process No. Name of indicator Example No. 1 Example No. 2 Example No. 3 one Drum loading, kg 5 5 5 2 Drum loading time, min 10 10 10 3 Working room temperature, ° С 30 ± 2 30 ± 2 30 ± 2 four The specific solution of the alcohol-camphor solution, (l / min) / kg 0.0012063 0,001298 0.00139 5 Graphite loading,% 0.1 0.2 0.3 6 Duration of product treatment with a solution of phlegmatizer and its polishing, min 60 80 120 7 Drum stop and product unloading, min twenty twenty twenty 8 Product drying time, min 240 240 240 9 Drying temperature, ° С 54 ± 2 ° 54 ± 2 ° 54 ± 2 ° 10 Sampling for determination of physicochemical and ballistic characteristics, min twenty twenty twenty eleven The duration of the technological cycle, min 340 360 400

The results of ballistic tests of the obtained prototypes with a different percentage of camphor input for the WU powder were _polished in Table 2, for the TMV powder, in Table 3.

table 2 Ballistic characteristics of gunpowder samples WU _fl Mark of source of gunpowder Camphor Amount Ballistic characteristics TU 7277-205-07506808-97, PI 2-2005 Mass of charge, g V _25cp m / s P _mcp kgf / cm ² marginal working WU _pollinated. 1,6 1,62 1,60 724 2327 W _slave. , not more than 1.71 g. V _25av not less than 710 m / s P _mcp , not more than 2700 kgf / cm ² Camphor,%, not more than 1.8 1,5 1.68 1,62 711 2435 1,2 1,54 1,5 690 3190

The analysis of the above results shows that the experimental samples of the powder WU _fl from gunpowder WU _pollinated. with the introduction of camphor 1.5% meet the requirements of technical specifications for ballistic characteristics.

Table 3 Ballistic characteristics of VT powder samples Grade of source of gunpowder Camphor Amount Ballistic characteristics TU 7277-229-07506808-2003 Mass of charge, g V _25cp m / s P _msg kgf / cm marginal working Vtm 1,5 3.30 3,50 820 2861 W _work ., Not less than 2.60 g. V _25ср 820-850 m / s P _mcp , not more than 2900 kgf / cm ² camphor,%, not more than 2.0 1,2 3.35 3.25 839 2672 1,0 3.25 3.20 854 2943 1,5 3.30 3.25 835 2750 OST B 84-2232-85 “4” W _work ., Not less than 3.10 g. V _25cp = 830 m / s P _mcp , not more than 2880 kgf / cm ² camphor,%, not more than 1.8

The results show that experimental samples of VT powder from VTM powder with camphor content on average 1.2% in terms of ballistic characteristics meet the requirements of technical specifications and with the content of 1.5% OST V 84-2232-85 “4”.

The results obtained on the experimental samples were tested on batches manufactured on industrial equipment - a phlegmatization drum with a load of 160 kg.

Physico-chemical and ballistic characteristics of the obtained powders in industrial equipment are given in table 4.

Table 4. Physicochemical and ballistic characteristics of serial batches of VT and VU _flasks made of VU _opyl and VTM powders in industrial equipment No. Gunpowder brand Party number physical and chemical indicators Ballistic indicators Volatiles Camphor% Bulk density, kg / dm ³ Resistance to manm. method, mmHg Mass of charge, g. Average speed (V _25cp ) m / s Maximum pressure, kgf / cm ² Deleted % Not / deleted. % P _mcp P _mnb P _mnm one 2 3 four 5 6 7 8 9 10 eleven 12 13 VT TU 7277-229-07506808-2003 1.0-2.0 not less than 0.4 no more than 1.8 not less than 0,800 no more than 220 not less than 2.60 820-850 no more than 2900 no more than 3100 no less than 2300 one 1/05 1.3 1.4 1,0 0.941 72 3.24 830 2476 2628 2417 2 05/02 1,1 1,2 1,1 0.939 78 3.24 846 2647 2702 2586 3 3/05 J 1,1 1,6 1,0 0.931 80 3.20 843 2760 2898 2665 four 4/05 1.3 1,6 0.9 0.927 87 3.20 839 2638 2713 2545 Woo _fl TU 7277-205-07506808-97, PI 2-2005 1.0-2.0 not less than 0.4 no more than 1.8 faculty. no more than 220 no more than 1,71 not less than 710 no more than 2700 no more than 2900 no less than 2300 one 3/05 J 1,1 1.3 1,5 0.880 83 1,66 724 2424 2466 2376 2 4/05 1,1 1,2 1.3 0.885 77 1.70 732 2441 2472 2373 3 5/05 1,1 1.4 1,2 0.892 77 1.71 732 2466 2514 2394 four 6/05 U 1,1 1,2 1,2 0.894 82 1,69 733 2489 2698 2383

As the results of work carried out, the ballistic characteristics meet the requirements specification and are provided with camphor Content Analysis for powder slave _fl not more than 1.3%, and for BT powder - 1,0 ÷ 1,1%.

Claims (1)

A method of obtaining a pyroxylin porous powder for cartridges of caliber 7.62 × 39 and 7.62 × 54 hunting weapons and cartridges of caliber 7.62 small arms, comprising surface treatment of powder elements, characterized in that the surface treatment of powder elements from gunpowder grades WU _pollinated and VTM is produced by alcohol-camphor solution with a specific flow rate in the range of 0.0012063 (l / min) / kg-0.00139 (l / min) / kg for 20-28 minutes, then in the drum for 60-120 minutes with the addition of graphite in the amount of 0.1-0.3% by weight of gunpowder.