Blasting chamber for synthesis of detonation nanodiamonds

FIELD: blasting.

SUBSTANCE: blasting chamber comprises a vertically mounted cylindrical shell with bottoms, an access door and means for securing an explosive charge inside the chamber. The chamber is made of steel-plated reinforced concrete, the chamber walls contain pipes being evenly distributed over the chamber inner surface. The centrelines of said pipes are directed to the centre of the chamber, wherein the pipes are connected with air-tight water tanks that are connected with a compressed air receiver through solenoid valves, wherein the chamber bottoms have a conical shape and in the centre of each bottom there is an expander having the shape of a cylinder or a polygon, on the side face of which there is a door for loading a charge into the chamber and discharging explosion solid products. Said means for securing the explosive charge have the form of a steel wire rope extending along the chamber centerline and capable of moving, lifting and holding the charge by means of an electric hoist mounted on the top expander bottom and of a section wire, one end of which is attached to the wire rope, and another - to the charge.

EFFECT: improving the efficiency of the chamber; safety and ease of its use requiring no personnel entry inside the chamber.

2 cl, 1 dwg

 

The technical field

The invention relates to a pressure treatment of materials, namely the explosive chambers designed to contain explosions in the processing of explosive materials for the purpose of industrial production of detonation nanodiamonds.

Prior art

There are various construction blasting chambers for the synthesis of superhard materials (see the book V.V. Danilenko, "Synthesis and sintering of diamond Bang, M.: Energoatomizdat, 2003, 272 C.). They represent a strong steel vessel, inside which is placed the explosive charge and the material being processed. When the explosion of the charge inside the cell load on the walls of the chamber are determined by the amplitude of the pressure pulse shock wave on the walls. To ensure the robustness of the walls when multiple explosions amplitude pressure should be 4-5 times less than the yield strength of steel used, and the pulse is offset by the weight of the chamber walls. Depending on the materials and construction of the camera for each kilogram of exploding charge 2 to 10 m3the internal volume of the chamber. The pressure of explosion products on the surface charge of about two orders of magnitude higher than the yield strength of the best grades of steel. Therefore, any part or parts of the camera located near the exploding charge will quickly deteriorate.

Oba is but for research and technological objectives are easier to manufacture cylindrical explosive chamber, which in the greatest explosion loads are on the Central section (which explodes the charge), the centers of the bottoms and joints bottoms with the walls of the chamber.

For the industrial production of detonation nanodiamonds need to blow up the camera charges of explosives large mass (20 kg or more). For reliable localization of multiple explosions such charges steel Luggage must have a large volume (>100 m3) and weight (over 100 tons), which increases the camera, and have a large volume (>100 m3) and weight (over 100 tons), which increases the camera and makes its transportation and installation.

Known Luggage for explosive working of metals (see ed. mon. The USSR №875706, CL 21D 26/06, 1985), comprising a housing consisting of a Central part, made in the form of concentrically mounted with clearance in the cylinder and adjacent the bottom and top fixed by the lock, and the inner cylinder is installed freely and with a gap relative to the cover, and the ends of the outer cylinder is made covering the ends of the inner cylinder tabs, centering the latter along the axis. In the bottom of the strengthened specimen table to accommodate processed by the explosion of the product. This technical solution adopted for the analogue of the claimed invention. The disadvantages of analogue are limited operational capabilities, as the camera is what type you want to open after each explosion to retrieve the processed material and cleaning its internal cavity.

Known explosive Luggage KB - 2 (designed and manufactured in the Bureau GIT SB as USSR), allowing you to save gas and condensed products of detonation of the charges weighing up to 2 kg (New materials and technologies. Extreme technological processes. Novosibirsk, Nauka, Siberian branch of the Academy of Sciences, 1992, p.63-69), selected as a prototype, because it can also be used for the synthesis of detonation nanodiamonds.

Camera - prototype displacement 2,14 m3consists of vertical steel cylindrical body with two hemispherical bottoms. On a special frame fixed upper fixed camera cover and the bottom cover plate is opened hydraulically after the nomination of the camera body from the frame. Charge with detonator is hung from a wire in the center of the camera in the camera position outside the frame and then the casing is pushed into the frame and closes the top cover. Is Subversion.

The disadvantages of the prototype:

- the camera is not designed to use water as the cooling medium;

- the camera is not designed for explosions charges a large mass, which limits its performance;

in the process, heavy camera should move.

Disclosure of inventions

The technical result of the present invention is to provide a construction of explosive chambers is for detonation synthesis of nanodiamonds with a wide operational capabilities, due to the enhanced camera performance, safety and ease of operation, with the possibility of multiple explosions explosive substances a large mass (20 kg or more) without making massive cooling shells and without entry of personnel into the camera for setting charges in the chamber and discharging from the chamber received nanodiamonds, and the reduction of explosive loads on the chamber design.

This is due to the fact that the proposed design explosion chamber for the synthesis of detonation nanodiamonds containing a vertical cylindrical body with a bottom, a hatch for access to the interior chamber and means for mounting inside the chamber of an explosive charge, is made of coated steel reinforced concrete, the walls of the chamber evenly along its entire inner surface of the installed pipe, the axis of which is directed into the center of the chamber, and a pipe connected with an air-tight tanks with water, which, by means of electromagnetic valves connected to the receiver with compressed air, in the center of each of the conical bottom of the camera is set to the extender in the form of a cylinder or a polyhedron, on the side surface which has a hole transporting charge inside the chamber and for discharging the solid products of the explosion, and the means of attaching an explosive charge made in the form of Rhodesia axis camera steel cable able to move, lift and hold a charge using the cable that is installed on the bottom of the upper expander, and cut wire, one end of which is fixed on the cable, and the second on the charge.

Comparative analysis of the invention with the prototype shows that the stated camera has new features that enhance the performance of camera to produce detonation nanodiamonds, safety and convenience of its operation.

The stated objectives of this invention are achieved as follows. Improving the performance of the synthesis of nanodiamonds in the chamber is ensured by using charges a large mass (20 kg or more), the mechanization of technological operations, in particular, installation charges in the center of the camera and unloading of nanodiamonds from the camera.

The security and usability of the camera is provided by the mechanization of technological operations that do not require entry of personnel into the camera with a hazardous atmosphere, the use of devices that reduce explosive load on the camera.

To reduce the loads on the camera and hardening of the proposed design of the camera is used in the following ways: created in the chamber before the explosion many water jets aimed at the center of the camera on charge and partially neutralizing the energy of explosion products, moving from C is the number to the chamber walls, and extenders that reduces the load on the bottom of the camera.

The duration of operation of the camera is also determined by the fact that the camera does not have parts close to the charge and therefore perishable.

The stated problem is solved. The camera can be used repeatedly for the industrial production of detonation nanodiamonds with the mechanization of the basic technological operations without logging personnel inside the camera.

Brief description of drawings

The drawing shows a longitudinal section of the explosion chamber. Explosion chamber is made of coated steel reinforced concrete and consists of a vertical cylindrical body 1 with a conical bottom 2. The chamber walls are installed pipe 3, evenly distributed over the entire inner surface of the chamber, and the axis of the pipe is directed toward the center of the camera. Pipe 3 is connected with a pressurized tanks with water 4, which is connected with the solenoid valves 5 and receiver 6 with compressed air. In the center of each of the conical bottom 2 is the extender 7 in the form of a cylinder or a polyhedron, on the side surface of which has a hatch 8 for transporting into the camera to charge and to discharge from the chamber of the solid products of the explosion. Charge 9 is suspended in the center of the camera on the wire 10 and the wire 11 through the cable 12, is installed on the bottom of the top is the first extender.

Explosion chamber works as follows.

Tanks 4 are filled with water, and the receiver 6 is compressed air. The hatch opens 8 of the lower expander 7. Charge 9 is installed on the bottom of the lower expander 7. Using wire 11 charge 9 is suspended on the cable 10 and using the chain hoist 12 rises in the center of the camera. Opens the valve 5 in the compressed air which is fed into the tanks 4 and displaces the water from the tank into the chamber through pipe 3. The camera generates numerous streams of water moving from the walls of the chamber toward its center, where the suspended charge 9. Is undermining charge 9. The time interval between the opening of the valves 5 and undermining charge 9 for each of the camera is determined experimentally. Simultaneously with the detonation of the charge 9 close the valve 5. The resulting aqueous suspension of detonation nanodiamond using pump is pumped from the chamber, and then the hatch opens 8 and unloaded from the camera solid products of the explosion. Then the camera is suspended from a new charge 9 and the working cycle is repeated.

Industrial applicability

This invention will find application in the production of detonation nanodiamonds. For the production of up to 5 tons per year of detonation nanodiamonds the explosion of charges of alloy TNT - RDX TG/60 weight 20 kg declare explosion chamber of coated steel reinforced concrete should have the DNAs is Rennie diameter 8 m, the inner diameter of the dilator - 2,5 m, height of the cylindrical body 6 m, the height between the bottom of the extender inside the camera - 14 m, the thickness of the walls of the chamber to 0.4 m

1. Explosion chamber for the synthesis of detonation nanodiamonds containing a vertical cylindrical body with a bottom, a hatch for access to the interior chamber and means for mounting inside the chamber of an explosive charge, wherein the camera is made of coated steel reinforced concrete, the walls of the chamber evenly along its entire inner surface of the installed pipe, the axis of which is directed into the center of the chamber, and a pipe connected with an air-tight tanks with water, which, by means of electromagnetic valves connected to the receiver with compressed air, while the bottom chamber are made conical, in the center of each plate is installed the extender in the form of a cylinder or a polyhedron, on the side surface of which is a hole transporting charge inside the chamber and for discharging the solid products of the explosion.

2. The camera according to claim 1, characterized in that the means of attachment of the explosive charge made in the form of passing through the axis of the camera steel cable, able to move, lift and hold a charge using the cable that is installed on the bottom of the upper expander, and cut wire, one end of which is fixed to t the EfE, and the second on the charge.



 

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