UA65194A - Detonation gas gun - Google Patents

Abstract

Gas detonation gun contains a barrel for detonation of gas mixtures, a mixer of gases containing housing, channels for feed of working gases, branch connection for feed of the powder, igniting device, and housing of mixer with plugs mounted on a common axis. Housing and plugs are cylindrical, channels for feed of working gases are connected with the cavity in the housing between the ends of plugs with a clearance. Cavity in the housing is connected with the chamber of preliminary explosion, which is connected to the barrel for the detonation of gas mixture, thereat the igniting device is mounted in the chamber of preliminary explosion.

Description

The invention relates to the field of coating, in particular by the detonation method.

A well-known device for applying a coating with powder materials by detonation method, which has a working chamber in the form of a barrel, a safety tube-coil, and a fire-stopping assembly. The preliminary and full blowing unit and the mixing chamber are equipped with electromagnetic valves and the spraying cycle is determined by the valve activation program. (A. p. of the USSR Me438215, cl. MKY VOB5V 7/20 1978).

Disadvantages of this system include: short working time for valve failure, inclusion of a blow-down device in the work cycle, complexity of the gas control system.

A well-known device for applying a coating with powder materials by detonation method, which contains: a barrel, a powder material dispenser, an ignition device, an injector-type gas mixer and a Laval nozzle for feeding the gas mixture into the barrel, installed at an angle of 907215" to the axis of the barrel. (A. p. USSR

Me508994, class MKY VO5V 7/04 1973).

The disadvantage of this well-known design is the unreliability and instability of operation, since in the event of an explosion in the barrel, the detonation wave will be drawn into the tube that connects the Laval nozzle to the injection mixer and, as a result, the mixer will fail.

A detonation-gas gun is known, which has: a barrel for detonating gas mixtures, a gas mixer, which in turn has a housing, channels for supplying working gases, a nozzle for supplying powder, an ignition device, a mixer housing with plugs placed on one axis. (Decision on issuing a patent on application Meo4826065/05 dated 04.17.90).

This design is difficult to make and set up.

A detonation-gas gun of a technologically simple design with increased reliability and stability of operation is required.

This is achieved by the fact that in a known detonation-gas gun, which contains a barrel for detonating gas mixtures, a gas mixer containing a housing, channels for supplying working gases, a nozzle for supplying powder, an ignition device, a mixer housing with plugs, which are installed on one axis According to the invention, the housing and plugs are cylindrical, the channels for supplying working gases are connected to the cavity in the housing between the ends of the plugs, and the cavity in the housing is connected to the pre-explosion chamber, which is connected to the barrel for detonating gas explosions. At the same time, the ignition device is installed in the pre-explosion chamber.

The invention is explained by the drawing, where: Fig. 1 shows a cross-section of a detonation-gas gun, Fig. 2 shows the pre-explosion chamber.

The detonation-gas gun contains a barrel 1 for detonating gas mixtures, a gas mixer, which has a body 2, into which cylindrical plugs are inserted From the supply of working gases, through radial drilling 5, a gap 6 for supplying working gases to the mixing chamber 7. Tubes 8,9 ,10 are an additional mixing device, and connect the pre-explosion chamber 11 with the mixing chamber 7.

The gun is equipped with a powder supply tube 12.

The additional mixing device is a tube-coil, or simply tubes welded together, which provide a defined path for the passage of the gas mixture before being fed into the pre-explosion chamber 11.

The device of additional mixing simultaneously acts as a way to brake the reverse shock.

The pre-explosion chamber is a device that has: a housing 13 into which a car candle 14 is screwed, an opening 15, which supplies the gas mixture, a channel 16, which removes the gas mixture.

The channel 16, which removes the gas mixture, is made in such a way as to reduce the cumulative effect of the reverse impact of the main explosion and is a drilling deeper than the channel that connects the chamber of the pre-explosion barrier 11 with the direct drilling of its own channel, which leads the gas mixture into the main chamber explosion

The detonation-gas cannon works as follows:

The working gas enters the gap 6 of the mixer through channels 4 and radial drillings 5. The opposing streams of gases mix well in the mixing chamber. The initially mixed mixture enters the additional mixing device, which consists of tubes 8, 9, 10, and then into the pre-explosion chamber 11 and barrel 1. Through the powder supply tube 12, powder is fed into barrel 1, which is sprayed. The mixture is ignited by a candle spark.

In a small volume, the mixture quickly burns out and a sharp jump in pressure occurs - an explosion. (If we disconnect the barrel, we will hear a characteristic impact and an explosion torch will fly out of channel 16). The directed torch of the explosion flame forces the mixture in barrel 1 to detonate. The explosion in the barrel picks up the sprayed powder, heats it up and carries it at high speed in the direction of the sprayed part, upon hitting it the powder adheres, forming a coating.

At the same time, the explosive wave is sent through the tubes 10,9,8 to the mixing chamber 7 (on the way, the mixture in the tubes burns out and the speed of the reverse impact slightly decreases) detonating the mixture in the chamber 7.

Detonation products are directed into the gap 6, where they are cooled and extinguished. In the gaps, there is a decrease in pressure and temperature, and at the same time, there is a shutdown of the gas supply. Detonation products act as a shut-off valve.

After firing a shot, a discharge occurs in barrel 1. Under the action of the loss pressure in the gas lines, the gases are directed along the previously described path and fill the barrel - a repeated shot occurs, etc.

The use of cylindrical plugs with a gap is explained by the fact that the inlet pressure drops quickly. The outlet pressure depends on the diameter, length and size of the gap. This means that the first task of the gap is to reduce the pressure at the outlet of the plug (that is, at the inlet of the working gases).

The second is that the flame, coming into contact with the walls of the gap, loses its temperature due to the removal of heat in the walls and goes out, that is, the plugs are flame extinguishers.

The third is that the products of detonation block the flow of working gases, that is, the use of a gap allows the products of detonation to perform the role of a shut-off valve.

The pre-explosion chamber is constantly bathed in an (explosive) mixture of gases and enough of a spark to detonate the mixture. Thus, the ignition conditions are improved, compared to ignition in the trunk.

The second - the explosive wave causes a useful reaction, that is, the explosion originates in the main explosion chamber earlier than with the ignition of gas in the barrel, as the combustion turns into an explosion. Due to this, the range of adjustment of spraying modes is expanded. The combustion phase in the barrel falls out, that is, an explosion immediately occurs. just ; by DK onenvnnny disk nnennyi NO

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Claims (1)

A detonating-gas gun, which contains a barrel for detonating gas mixtures, a gas mixer containing a housing, channels for supplying working gases, a nozzle for supplying powder, an ignition device, a mixer housing with plugs, which are mounted on one axis, which is distinguished by the fact that the housing and plugs are cylindrical, the channels for supplying working gases are connected to the cavity in the housing between the ends of the plugs by a gap, and the cavity in the housing is connected to the pre-explosion chamber, which is connected to the barrel for detonating gas mixtures, while the ignition device is installed in pre-explosion chamber.