RU2111198C1 - Grinding apparatus for tubular gun powder - Google Patents

Abstract

FIELD: recovery of artillery pyroxilyn tubular gun powder. SUBSTANCE: apparatus for grinding tubular gun powders to produce roll-shaped pellets of uniform size has gravitational chute with set of knives and roller with elastic-deformation surface. Roller is spaced from set of knives by distance less than diameter of powder tube. Prior to grinding, annular recesses are cut in powder tubes. Final separation is effectuated by disks on rotors. EFFECT: increased efficiency in recovery of gun powder, simplified construction and enhanced reliability in operation. 3 dwg

Description

 The present invention relates to the field of disposal of artillery pyroxylin tubular powders.

 The present invention has created a number of industrial explosives such as "Dibazit", "Granipor" and others, which includes grain pyroxylin powder.

 New explosives are in great demand, and therefore, the stockpiles of pyroxylin powder to be disposed of are rapidly declining. At the same time, there are reserves of tubular powders to be disposed of. However, the lack of devices for productive processing of tubes into grains inhibits their use.

 From the technical literature, it is known to use the Kuzmin Disk Mill (DMK) for grinding a disk mill (see "Conversion", part IV, "Disposal of Disarmament of Ammunition and Solid Fuel Missiles", TsNIINGIKPK Moscow, 1996, p. 103). But the resulting product is not suitable for use as explosives of the above brands in particular. In addition, the process is energy intensive. Attempts are being made to use the cutting machine RS-125-I (developed by NIHTI, Dzerzhinsk, Moscow Region, drawing 9330-I). This results in a product unsatisfactory in terms of particle size distribution. Granules have an arbitrary shape with a variable bulk density and a burning surface. The best form of granules are rollers of a constant length not exceeding 20 mm.

 Taken as a prototype cutting machine RS-125-I does not ensure the achievement of the goal. Its working body is two rotors rotating towards each other with a set of disks similar to milling cutters.

 Disks are installed with a gap between themselves and are shifted in steps. During operation, the powder tubes are captured by milling cutters and destroyed into fragments of arbitrary shape and size. The resulting product is a mixture of granules from dust to splinters exceeding 20 mm. In the process (packaging, transportation, dosing, etc.), delamination occurs, and this violates the stability of the characteristics of the charges.

 To achieve a technical result, i.e. receiving programmable standard sizes of elements of constant length, a device is proposed that provides the necessary conditions for this in high performance mode. The essence of the proposed device lies in the fact that in front of the rotors with disks mounted gravity tray, part of which is a set of parallel knives and a roller with an elastically deformable surface. Knives are installed with a gap between themselves. The size of the gaps is equal to the length of the granules. The edges of the knives are facing up. The width of the set corresponds to the length of the tube. A roller is mounted above the knives. The length of the roller also corresponds to the length of the tube. The axis of its rotation is perpendicular to the blades of the knives. The roller is gummed with an elastically deformable material, for example polyurethane, and kinematically connected with the rotor rotation drive. The forming roller is separated from the blade blades at a distance less than the diameter of the powder tube. In FIG. 1 shows a general view of the device; in FIG. 2 - section along aa in a general view; in FIG. 3 - view along B in a general view.

 The device includes a frame 1, a set of knives 2, a roller 3, a gravity tray 4, rotors 5 and 6 with disks 7, a receiving hopper 8.

 The roller 3 is coated with polyurethane and kinematically connected with the rotor 5 through the chain 9. The rotors 5 and 6 are connected by a gear transmission to each other and to the rotation drive.

 The device operates as follows.

 From the feed hopper, the powder tubes through a gravity tray 4 go to the rotating roller 3, are captured by it and rolled along the blades of the knives. The blade tips, penetrating into the tubes, leave ring cuts on their surface. The depth of cut is proportional to the loading force of the tube. The incised tubes along the gravity tray 4 are rolled onto the disks 7 of the rotors 5 and 6. In this case, the incisions in the tubes are placed on the rotor disks. Rotating, the discs grab the tubes and break them strictly along the notches with the formation of granules in the form of rollers with a length of "l". This is facilitated by the property of pyroxylin powder - vitreous. The resulting granules are fed into the hopper 8 and removed from it, for example using pneumatic conveying.

 An experimental verification of the operation of the device on the model. Received positive results. Variant of execution: roller 3 with a set of circular knives, and the plane below it is elastically deformable.

Claims (1)

 A device for grinding tubular gunpowder of predominantly pyroxylin artillery containing a frame, two rotors with disks and a drive, characterized in that a gravity tray is mounted in front of the rotors with disks, including a set of parallel knives installed with gaps between them and above them - a forcibly rotating roller with elastically deformable a surface spaced from the blades of the knives at a distance less than the diameter of the powder tube.

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