UA71199A - Gas-explosion gun - Google Patents

Abstract

Gas-explosion gun contains the cylinder for detonation of gas mixtures, the mixer of gases, which contains the housing, the channels for supply of working gases, the branch connections for supplying the powder, the igniting device, the housing of mixer with the plugs, which are located on one axis. Plugs are made in the form of truncated cones and may perform axial displacement for adjusting the slot between the body of plug and the congruent surface of housing. The chamber for mixing of gases is located between the plugs, and on the external surface of housing are executed one-thread or multiple-thread helical grooves tightly covered by a case. In the housing the opening is made in the center, one or several openings, or housing is cut in the center and assembled in the case with the clearance between the housing parts. Clearance or openings connect the chamber for mixing the gases with the multiple-thread grooves, which through the openings in the case are connected by tubes with the chamber of preliminary explosion, which is connected to the explosion chamber connected with the cylinder for the detonation of gas mixture. Igniting device is mounted in the chamber of preliminary explosion.

Description

Description of the invention

The invention relates to the field of coating, generally by the detonation method. 2 A known device for coating powder materials with a detonating agent, which has a working chamber in the form of a barrel, a safety tube-coil, and a fire-stopping unit. The preliminary and full blowing unit and the mixing chamber are equipped with electromagnetic valves, and the spraying cycle is determined by the valve operation program. (Av. St. USSR Mo438215, cl. MKY VO587/20 1978). 70 Disadvantages of this system include: short working time for valve failure, the inclusion of a blow-down device in the cycle, and the complexity of the gas management system.

A well-known device for coating powder materials with a detonating agent, 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 90-15" to the axis of the barrel. 19 (Av USSR certificate Mo508994, cl. MKIVOBV 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 dragged inside the tube that connects the Laval nozzle to the injector mixer and, as a consequence, the mixer will fail.

A known detonation-gas gun, 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 cylindrical plugs placed on one axis ( patent application Mo2003065511 from November 2003).

This design is difficult to set up.

Necessary detonation-gas cannon of a technologically simple design with reliability and stability in operation | easy to adjust. "

This is achieved by the fact that in a known detonation-gas gun, which contains a barrel for detonating gas mixtures, a gas mixer, a switching housing, channels for supplying working gases, a nozzle for supplying powder, an ignition device, a mixer housing with plugs, which are contained on one axis in a cylindrical case. According to the invention, the plugs are made in the form of truncated cones and have drilling for supplying working gases into an adjustable gap between the plug body and the congruent surface of the housing. Stoppers have the ability to move axially.

On the outside of the cylindrical housings there are multi-turn helical grooves connecting the chamber - mixing with the annular grooves that are located at the end of the cylindrical housings. The casings are assembled in a sleeve, "-- which has drilling and connects annular grooves with tubes 10, 11, through which the mixture of gases enters the pre-explosion chamber in counterflows. -

In the detonation-gas gun, which is required for spraying refractory materials, there is no pre-explosion chamber, and the gas mixture enters the barrel directly.

The invention is explained by the drawing, where: Fig. 1 shows a cross-section of a detonation-gas gun with a pre-explosion chamber; Fig. 2 shows a section of a detonation-gas gun with ignition in the explosion chamber. c Fig. 3 shows scans of the side lobes of the plugs.

From" The detonation-gas gun includes a barrel 1 for detonating gas mixtures, a gas mixer, which has a body 2, in which truncated conical plugs are installed. From the supply of working gases, through radial drilling 5, slot 6 for supplying working gases to the mixing chamber 15 Tubes 10, 11 and helical grooves 8, 49, which represent an additional mixing device, and connect the pre-explosion chamber 12 with the mixing chamber 15. - The gun is equipped with a powder supply tube 14.

The additional mixing device consists of many spiral grooves 8, end grooves 9, and tubes 10, 11, which provide a defined path for the gas mixture to pass before it is fed into the chamber

Te) 20 of the pre-explosion 16, where counterflows also provide additional mixing.

The device of additional mixing simultaneously acts as a way to brake the reverse shock. c The pre-explosion chamber is a device that has: housing 12, into which the car candle 13 is screwed, tubes 11, which supply the gas mixture, channel 17, which drains the gas mixture into the explosion chamber 20 and barrel 1.

In a gun that does not have a pre-explosion chamber, the ignition device is located in the explosion chamber 20 and has a housing 29 and a spark plug 13 (Fig. 2). in. The detonation-gas cannon works as follows:

The working gas enters the gap 6 of the mixer through channels 18 and radial drilling 5. The opposing streams of gases mix well in the mixing chamber. The pre-mixed mixture enters the additional mixing device, then into the pre-explosion chamber 16 and the explosion boat 20 connected to the barrel 1. 60 through the powder supply tube 14 into the barrel | a powder that is sprayed is served. The mixture is ignited by the spark of the candle 13.

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 flare will fly out of channel 17). The directed torch of the explosion flame forces the mixture in the explosion chamber and 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 sticks because it forms a coating.

At the same time, the explosive wave through the tubes 11, 10 and the additional mixing device is directed to the mixing chamber 15 (on the way, the mixture in the tubes burns out and the speed of the reverse impact decreases) detonates the mixture in the chamber 15. The detonation products are directed to the gap 6, where they cool and extinguish. In the gap

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. 70 In a gun that does not have a pre-explosion chamber, the gas mixture is ignited in the explosion chamber 20, connected to the barrel 1, the candle 13 and explodes. With the second and successive ignitions, the mixture in the ignition chamber 19 is partially diluted by combustion products, which ensures combustion, and not an explosion.

Combustion in the explosion chamber turns into rapid combustion and then into an explosion.

The use of conical truncated plugs has the same properties as cylindrical ones.

The pressure at the gas outlet depends on the diameters of the truncated conical plugs, the length and size of the gap between the plug and the body. The plug dramatically reduces the pressure of the reverse shock.

The second - the flame, coming into contact with the walls of the gap, loses its temperature due to heat removal in the walls and goes out, i.e. corks are flame extinguishers.

Thirdly, detonation products block the flow of working gases, i.e. the use of a gap allows the products of detonation to act as a shut-off valve.

When using conical plugs, the contact area of gases with the walls of the gap will be much larger than when using cylindrical plugs of Fig.3. This will significantly increase the efficiency of using truncated conical plugs compared to cylindrical ones.

Adjustment of the gap 6 is carried out with the help of spacers 7 of Fig. 1, it is much easier than when using cylindrical plugs (the gap is adjusted due to mechanical adjustment of the diameter of the cylindrical plug).

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

The second - the explosive wave causes a chain reaction, i.e. the explosion originates in the main explosion chamber earlier than with the ignition of gas in the explosion chamber, since the combustion turns into an explosion there. Due to this, the range of adjustment of spraying modes is expanded. The phase of combustion in the trunk falls out, i.e. And immediately there is an explosion. Me

When a mixture of gases is ignited in the explosion chamber, combustion transitions into rapid combustion, and then into "explosion". When fusible materials are sprayed, a gun with ignition in the barrel is more attractive. same pla voK "--

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Fig. 4

Claims (2)

The formula of the invention 1. A detonation-gas cannon, which contains a barrel for detonating gas mixtures, a gas mixer, which contains a housing, channels for supplying working gases, a nozzle for supplying powder, an ignition device, a mixer housing with plugs, which are located on one axis, which differs in that , that the plugs are made in the form of truncated cones and have the possibility of axial movement to adjust the gap between the plug body and the congruent surface of the housing, while between the plugs there is a gas mixing chamber, and on the outer surface of the housing, one-way or multi-way screw grooves are made, tightly covered with a sleeve, and a hole is made in the middle of the housing, one or more, or the housing is cut in the middle and assembled in a sleeve with a gap between the parts of the body, while the gap, or holes, connect the gas mixing chamber with multi-entry grooves, which are connected by tubes through the holes in the sleeve with a pre-explosion chamber which is connected to an explosion chamber connected to a barrel for detonating gases of the mixture, while the gases from the supply channels of the working gases enter the gap between the plugs and the housing, then into the mixing chamber, and further along the connection they enter the screw grooves, where they are then separated in half. Each part of the gas mixture flow is separate is additionally mixed, through the holes in the sleeve and the tubes, the counterflows of gases enter the pre-explosion chamber, where the flows are reunited, further mixing, enter the explosion chamber and (2) the gas detonation barrel connected to it, while the ignition device installed in the chamber prior to the explosion. 2. The gun according to claim 1, which differs in that the mixture of gases through the holes in the sleeve and the tubes connected to them (zh7) enters the explosion chamber, which is connected to the barrel, in countercurrent flows, while the ignition device, one "- or several, installed in the explosion chamber. and - Official Bulletin "Industrial Property". Book 1 "Inventions, useful models, topographies of integrated microcircuits", 2004, M 11, 11/15/2004. State Department of Intellectual Property of the Ministry of Education and Science of Ukraine. " - . and? -i - - se) 3e) 60 b5