RU2422416C1 - Method of mixing explosive components - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to explosives, particularly, to production of explosive components. Proposed method comprises making mix of liquid-viscous components by bubbling inert gas in vessel with cover and compressed inert gas feed and discharge valves, proportioning said mix of liquid-viscous components by feeding inert gas for displacement, proportioning powder components and their mixing. Mixing of liquid-viscous components by bubbling, and proportioning said mix of liquid-viscous components by feeding inert gas for displacement are performed subject to properties of liquid-viscous components and those of their mix.

EFFECT: higher quality and safety.

2 dwg, 2 tbl

Description

The invention relates to a method for mixing components of an explosive composition, and specifically to a method for preparing and dispensing a mixture of liquid-viscous components of an explosive composition using a container with a lid and a distributor mounted therein for introducing and discharging compressed gas.

A known method of mixing the components of the explosive composition according to the patent of the Russian Federation No. 2316527 (IPC C06B 21/00), including the preparation of liquid-viscous, powder components, dosing them into the mixer and mixing.

A device is known for preparing a mixture of nitroester with inert plasticizers described in the book "Equipment for the production of ballistic gunpowder by screw technology and charges from them" (L.A. Smirnov, Moscow State Academy of Chemical Arts, Moscow, 1977, pp. 55-56). Mixing a mixture of nitroester with plasticizers using this device is carried out by compressed air supplied through a special coil. The resulting mixture is poured into a container for the preparation of ballistic powder. The disadvantage of this device is the inability to use it to perform all the operations provided for in the process of preparing the powder mass: preparation of a mixture of nitroether with plasticizers, transporting it to the mixer for preparing the powder mass and loading it into the mixer.

The closest in technical essence and the achieved technical result to the proposed method of mixing the components of the explosive composition is the mixing method described in the application materials No. 2009117317/22 of 05/06/2009, patent for utility model No. 88667, published on 11/20/2009 Bull. No. 32 (IPC С06В 21/00) for a device for preparing a mixture of nitroester with inert plasticizers, adopted as a prototype.

According to this patent, the preparation of a mixture of nitroester with inert plasticizers is carried out by bubbling the compressed gas in a container with a lid and with a distributor mounted therein for introducing and discharging compressed gas. The finished mixture in this tank is transported to the mixer to prepare the fuel mixture and dosed into the mixer by supplying compressed gas to the tank for displacement.

The disadvantage of this method of mixing the components of the explosive composition selected by the authors for the prototype is the lack of regulation of the parameters of the process of preparing and dispensing a mixture of liquid-viscous components depending on its viscosity, which does not ensure the accuracy of dispensing components and obtaining high-quality explosive composition when manufacturing it using a mixture of liquid-viscous components with different levels of viscosity.

In contrast to the prototype in the proposed method, the preparation of a mixture of liquid-viscous components is carried out in a container with a lid and a distributor mounted in it for introducing and discharging compressed gas by bubbling an inert gas for 2-7 minutes at a viscosity of a mixture of liquid-viscous components of 0.01 ÷ 0.50 Pa · With a pressure of 0.05 ÷ 0.25 kgf / cm ² , and with a viscosity of a mixture of liquid-viscous components 0.50 ÷ 20.0 Pa · s - with a pressure of 0.26 ÷ 0.65 kgf / cm ² , a mixture of liquid-viscous is dosed components from the above tank by supplying an inert gas for displacement with a viscosity of a mixture of liquids viscous components 0.01 ÷ 0.50 Pa · s with a pressure of 0.30 ÷ 0.50 kg / cm ^2, and viscosity of the mixture when the components zhidkovyazkih 0.50 ÷ 20.0 Pa.s - with pressure 0,51 ÷ 0 , 90 kgf / cm ² .

An object of the invention is to provide a safe method for mixing the components of an explosive composition, ensuring its high quality workmanship on a mixture of liquid-viscous components with a viscosity of from 0.01 to 20.0 Pa · s.

The specified technical result in the implementation of the invention is achieved by the fact that in the method of mixing the components of the explosive composition, comprising preparing a mixture of liquid-viscous components by bubbling inert gas in a container with a lid and with a distributor mounted therein for introducing and discharging compressed gas, dispensing a mixture of liquid-viscous from the above-mentioned container by feeding inert gas for displacement, dosing of powder components and mixing them in the proposed method, preparation of a mixture of liquid-viscous components entov spend bubbling inert gas for 2-7 minutes at a viscosity of a mixture of liquid-viscous components of 0.01 ÷ 0.50 Pa · s with a pressure of 0.05 ÷ 0.25 kgf / cm ² , and with a viscosity of a mixture of liquid-viscous components of 0.50 ÷ 20.0 Pa · s - with a pressure of 0.26 ÷ 0.65 kgf / cm ² . A mixture of liquid-viscous components is dispensed from the tank by supplying an inert gas to displace with a viscosity of a mixture of liquid-viscous components 0.01 ÷ 0.50 Pa · s with a pressure of 0.30 ÷ 0.50 kgf / cm ² , and with a viscosity of a mixture of liquid-viscous components 0.50 ÷ 20.0 Pa · s - with a pressure of 0.51 ÷ 0.90 kgf / cm ² .

The invention is illustrated by the technological scheme for the preparation of explosive composition shown in figure 1, 2.

To prepare a mixture of liquid-viscous components, technological equipment is assembled according to the scheme shown in figure 1. A cover 2 is installed on the container 1 with a distributor mounted in it for the inlet (nozzle 3) and the outlet (nozzle 4) of the compressed inert gas. The fitting 3 is connected to the pipe 6 of a compressed inert gas. The fitting 4 is connected to a filter 13 for purifying an inert gas from the vapor of a mixture of liquid-viscous components. In the lid 2 of the container 1 there is an opening for loading components, blocked by a plug 5. On the inert gas supply line from the pipeline 6 to the container 1, a valve 7, a pressure reducer 8 with a pressure gauge 9, a throttle washer 10, a standard pressure gauge 11, a remote-controlled pneumatic clamp 12 are installed .

The preparation of a mixture of liquid-viscous components according to the proposed method is as follows. Open the plug 5 in the lid 2 and in the container 1 load the viscous components of the explosive composition. Cap 5 is closed. Open the valve 7 and the pressure gauge 11 adjust the pressure of the compressed inert gas in the pneumatic line. When the viscosity of the mixture of liquid-viscous components of 0.01 ÷ 0.50 Pa · s, the pressure is adjusted to a value of 0.05 ÷ 0.25 kgf / cm ² . After that, the pneumatic clamp 12 is remotely opened and a mixture of liquid-viscous components is prepared by bubbling inert gas for 2-7 minutes. When the viscosity of the mixture of liquid-viscous components is 0.50 ÷ 20.0 Pa · s, the pressure in the pneumatic line is adjusted to 0.26 ÷ 0.65 kgf / cm ² and the mixture of liquid-viscous components is prepared by bubbling inert gas for 2-7 minutes. After preparing the mixture of liquid-viscous components, remotely close the pneumatic clamp 12, close the valve 7 and disconnect the pneumatic line from the nozzle 3, the filter 13 from the nozzle 4. Remove the lid 2 and the container 1 is closed by the transport lid. Capacity 1 with the prepared mixture of liquid-viscous components is transported to the explosive preparation building, where the transport cover is opened and cover 2 is installed with a distributor mounted in it (with fittings 3, 4) for introducing and discharging compressed inert gas.

For dosing the prepared mixture of liquid-viscous components from the tank 1 into the mixer 14 for the preparation of explosive composition of the technological equipment is collected according to the scheme shown in figure 2. The fitting 3 is connected by a material pipe (rubber sleeve) with a mixer 14, and the fitting 4 is connected to a compressed inert gas supply pipe 6. On the inert gas supply line from the pipeline 6 to the tank 1, a valve 7, a pressure regulator 8 with a pressure gauge 9, a throttle washer 10, an exemplary pressure gauge 11, a remote-controlled pneumatic clamp 12 are installed. A remote-controlled pneumatic clamp is installed in the mixer 14 on the material pipeline for dispensing a mixture of liquid-viscous components fifteen.

Dosing a mixture of liquid-viscous components from the tank 1 into the mixer 14 for the preparation of explosive composition in the proposed method is as follows. Open the valve 7 and the pressure gauge 11 adjust the pressure of the compressed inert gas in the pneumatic line. When the viscosity of the mixture of liquid-viscous components of 0.01 ÷ 0.50 Pa · s, the pressure is adjusted to a value of 0.30 ÷ 0.50 kgf / cm ² . Then the pneumatic clamp 12 is remotely opened, an inert gas is supplied to displace the mixture of liquid-viscous components from the container 1. Then, the pneumatic clamp 15 is remotely opened and the mixture of the liquid-viscous components is dosed into the mixer 14 for preparing the explosive composition. When the viscosity of the mixture of liquid-viscous components 0.50 ÷ 20.0 Pa · s, it is dosed into the mixer 14 at an inert gas pressure of displacement of 0.51 ÷ 0.90 kgf / cm ² . After dosing the mixture of liquid-viscous components, the pneumatic clamps 12, 15 are remotely closed, the valve 7 is closed and the container 1 is disconnected from the mixer 14. Powdered components are metered into the mixer 14 and mixed with liquid-viscous components until a uniform explosive composition is obtained. Examples of specific performance of the method of mixing explosive are shown in tables 1, 2.

From the data of table 1 it can be seen that when the viscosity of the mixture of liquid-viscous components is 0.01 ÷ 0.50 Pa · s, a homogeneous mixture can be obtained at the inert gas pressures for bubbling 0.05 ÷ 0.25 kgf / cm ² and bubbling time 2 -7 minutes (options No. 1, 2, 5), and with a viscosity of a mixture of liquid-viscous components 0.50 ÷ 20.0 Pa · s - with an inert gas pressure for bubbling 0.26 ÷ 0.65 kgf / cm ² (options No. 10, 12). The output of the method parameters beyond the proposed leads to the entrainment of the mixture of liquid-viscous components in the inert gas removal line (options No. 3, 12); poor quality distribution of the components of the mixture due to insufficient inert gas pressure (options No. 6, 7) and due to insufficient time for bubbling inert gas (options No. 8, 9); to unjustified lengthening of the production cycle (options No. 4, 13). From the data of table 2 it can be seen that with a viscosity of a mixture of liquid-viscous components of 0.01 ÷ 0.50 Pa · s, it is possible to ensure a sufficiently high accuracy of dosing the mixture at the inert gas pressures chosen for the displacement of 0.30 ÷ 0.50 kgf / cm ² ( options No. 1, 2, 5), and with a viscosity of a mixture of liquid-viscous components 0.50 ÷ 20.0 Pa · s - at pressures of 0.51 ÷ 0.90 kgf / cm ² (options No. 9, 10, 11, 12) . The excess of the dosage parameters beyond the proposed leads to an increase in the dosage error of the components due to insufficient inert gas pressure to displace the mixture (options No. 3, 8) and due to the inert gas breaking through the mixture layer into the displacement line (options No. 4, 6, 13 )

The proposed method for mixing the components of the explosive composition tested with positive results in the pilot production of FSUE "NIIPM".

Examples of a specific implementation of the method of mixing the components of the explosive composition in the phase of preparation of a mixture of liquid-viscous components (GCF) by bubbling an inert gas.

Table 1 Options
No. p / p The viscosity of the mixture GFA, Pa · s Pressure for sparging, kgf / cm ² Sparging time, min Experiment result one 0.01 0.05 2 Homogeneous mixture 2 0.01 0.25 5 3 0.01 0.26 5 The entrainment of a mixture of LHC in the line of removal of inert gas four 0.05 0.25 7.5 The mixture is homogeneous, but the production cycle of the mixture is unreasonably extended 5 0.35 0.20 3 Homogeneous mixture 6 0.50 0.04 2 The pressure is insufficient to mix the mixture of components 7 0.52 0.25 2 8 0.50 0.25 one Sparging time is not enough to obtain a homogeneous mixture 9 0.52 0.26 one 10 3,5 0.25 2 Homogeneous mixture eleven 20,0 0.65 2 12 5,0 0.66 2 The entrainment of a mixture of LHC in the line of removal of inert gas 13 20,0 0.26 7.5 The mixture is homogeneous, but the production cycle is extended

Examples of a specific implementation of the method of mixing the components of the explosive composition in the phase of dispensing a mixture of liquid-viscous components by displacing an inert gas from a container under pressure.

table 2 Options, No. The viscosity of the mixture GFA, Pa · s The gas pressure for displacement, kgf / cm ² Experiment result one 0.01 0.30 Unloading the mixture without residue, dosing accuracy is ensured 2 0.01 0.50 3 0.01 0.28 The inert gas pressure is not enough to completely discharge the mixture. Component dosing error increases four 0.01 0.52 Inert gas passage (breakthrough) through the mixture layer to the displacement line, the metering error increases 5 0.35 0.30 Dosing accuracy is ensured. 6 0.35 0.52 Inert gas passage (breakthrough) through the mixture layer to the displacement line, the metering error increases 7 0.50 0.30 Dosing accuracy is ensured. 8 0.52 0.50 The inert gas pressure is not enough to displace the mixture of liquid metal from the tank 9 0.52 0.52 Dosing accuracy is ensured. 10 3,5 0.52 eleven 5,0 0.70 12 20,0 0.90 13 20,0 0.95 The inert gas breakthrough through the layer of the liquid-metal mixture at the end of discharge Dosing accuracy is reduced

Claims (1)

A method of mixing the components of an explosive composition, including preparing a mixture of liquid-viscous components by bubbling inert gas in a container with a lid and with a distributor mounted therein for introducing and discharging compressed inert gas, dispensing a mixture of liquid-viscous components from the above container by supplying an inert gas for displacement, dosing of powder components and mixing them, characterized in that the preparation of a mixture of liquid-viscous components is carried out by bubbling an inert gas for 2-7 minutes with a viscosity of a mixture of liquid-viscous components of 0.01 ÷ 0.50 Pa · s with a pressure of 0.05 ÷ 0.25 kgf / cm ² , and with a viscosity of a mixture of liquid-viscous components of 0.50 ÷ 20.0 Pa · s with a pressure of 0, 26 ÷ 0.65 kgf / cm ² , the mixture of liquid-viscous components is dosed from the tank by supplying an inert gas to displace when the viscosity of the mixture of liquid-viscous components is 0.01 ÷ 0.50 Pa · s with a pressure of 0.30 ÷ 0.50 kgf / cm ² and when the viscosity of the mixture of liquid-viscous components 0.50 ÷ 20.0 Pa · s - with a pressure of 0.51 ÷ 0.90 kgf / cm ² .

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