RU2143660C1 - Method for destruction of solid propellant charges - Google Patents

Abstract

FIELD: rocket engineering; recovery of solid propellant charges. SUBSTANCE: according to invention, solid propellant case-bonded charges are placed on revolving device, set in rotary motion, pre-nozzle part of case is separated, and then charge is cut into ring-shaped portions by means of hydraulic cutting tool, whereupon charge portion under cut ring of case is crushed into crumbles. Wet crumbles of charge are either added together with hydraulic-cutting waste water as components for manufacturing water-helium explosives or burned in low-capacity furnace at high degree of cleaning of combustion products. Process can be visually controlled all the time. EFFECT: wasteless technology, improved environmental friendliness and fire safety. 3 cl, 1 dwg

Description

 The invention relates to methods for the elimination (grinding) of solid rocket propellant charges bonded to a body with inseparable bottoms.

 Existing methods for eliminating TPT charges based on charge burning (RF patents N 2021560, N 2087804) have fundamental disadvantages: the high cost of cleaning combustion products during the burning of bulky charges and the high fire and explosion hazard of destruction, especially when destroying defective charges.

 Analogs include the method of mechanical disposal of cases and charges on turning and planing machines using metal cutters (see L. A. Smirnov, OV Tinkov. Conversion. Part IV. TSNIINT IKPK, 1996, p. 72). At the same time, a special grinder is used to break the chips and obtain crumbs. This method is fire hazard, implements low productivity and expensive, since the water used to cool the cutters requires the cost of cleaning it. In addition, this method does not generate part of the charge in the parietal layer of the casing, and it is impossible to eliminate the bonded charge without destroying the casing.

 As a prototype, a method for eliminating TPT charges by means of a hydromonitor unit for extracting TPT from the solid propellant rocket engine body has been considered (see L. A. Smirnov, O. V. Tinkov. Conversion. Part IV. TsNIINTIKPK, 1996, pp. 74-75). Here, a rod with nozzles through which cutting jets of high pressure water flow out is introduced into the nozzle hole of the solid propellant rocket motor and a channel of a rotating charge, inclined at an angle to the horizontal plane. In the charge channel, circular and longitudinal cuts are cut, and then pieces of cut TPT cut by cuts are cut with jets of water from oblique nozzles. A similar installation (M-115) for washing bulky charges from a fixed body is used at Tayokol (USA) (see Information from Tayokol Corporation 1996). The disadvantages of these methods are to obtain large pieces of charge and housing, requiring additional grinding, and a large flow of water, which must be cleaned. A significant drawback is the difficulty of controlling the cutting process in the charge channel, because possible contact of a metal tool with moving fuel and solid propellant design elements, which determines the high risk of the process.

 An object of the invention is the creation of a visually controlled method for eliminating solid fuel charges bonded to a housing (ZSK) with inseparable bottoms, which allows metering predetermined shares, waste-free, environmentally friendly, fire and explosion safe to grind and eliminate ZSK.

 This problem is solved by the fact that ZSK is installed on the rotation device, rotated, the pre-nozzle part of the housing is separated and crushed. When the cocoon type KSK with inseparable bottoms is eliminated, the body is cut to separate the pre-nozzle part, which is not fastened to the charge, and the end of the charge is opened. To separate parts of the body, a cutting jet of ultrahigh pressure of the hydraulic cutting unit (UG) is used. After separation of the parts of the housing, a grinding head (IG) from this unit is brought to the outside of the housing so that its cutting end is parallel to the surface of the housing, and a part of it is crushed in the form of a ring from the side of the open end of the mill. Then, the water pressure in the IG is reduced to the value necessary for grinding TRT, and the fraction of charge under this ring is crushed into crumbs. Repeating these operations, completely eliminate the charge and body in parts.

 All wet charge chips are either added together with water generated after water cutting as components for the production of a water-gel industrial explosive, or they are dosed in a special furnace, while achieving a high degree of purification of the combustion products by burning the chips in small fractions.

 The use of this method in the elimination of cocoon type ZSC is shown in FIG. 1. Here are shown: the charge TRT 1, housing 2, the drive of the device for rotating the charge 8. KG include a rod 6 for supplying water, IG 3 with cutting nozzles, actuators 4 and 5, performing vertical and horizontal movement of the head, and a source 7 of high pressure water. The figure shows the ZSK with a cut off nozzle bottom. Upon elimination, the annular part of the housing is first crushed from the outside of the charge. For this, the water pressure is increased to the pressure necessary for grinding the body, and the IG is brought to the outside of the body so that its cutting end is parallel to the surface of the body. IGs are moved along the body, cutting out part of it in the form of a ring with a width H sufficient to hold a charge on the rotation device, then lower the water pressure to the value necessary for grinding TRT, and charge under the ring is crushed. When repeating these operations, the rest of the charge is ground.

 The advantages of the proposed method are that the process of eliminating the charge occurs without the contact of metal parts with TRT. In addition, a high fire and explosion safety of the method is realized, which is ensured by reliable visual and automatic control of the grinding process of ZSK. At the same time, water is consumed an order of magnitude less than when grinding with the help of mechanical cutters. Baby TPT get high quality, any given size. The process is environmentally friendly due to the small amount of water used and the elimination of the need for its purification, since wet crumb with waste water is fully used as a component of industrial explosives. This ensures the economy and non-waste method. When burning chips, environmental friendliness is ensured by the possibility of burning small portions of crushed chips, which allows for efficient cleaning of combustion products.

 Tests of the proposed technology were carried out when disposing of a large-sized charge of mixed solid fuel bonded to a body weighing about 4 tons. A crumb of 6x3x3 mm was cut with a capacity of 200 kg / h at a water flow rate of 0.6-0.8 l per 1 kg of TRT, which was used in the manufacture of industrial BB The FPDT "SOYUZ" organized a pilot plant for the elimination of KSK and the production of water-gel industrial explosives. Here, small portions of wet crumbs were burned with a high degree of purification of the combustion products.

 The method can be used in the elimination of charges of solid rocket fuels bonded to the body with inseparable bottoms, including defective ones, as well as in the disposal of waste production of charges TRT.

Claims (3)

 1. The method of eliminating the charge TRT, bonded to the housing with inseparable bottoms, which consists in the fact that the charge with the housing is installed on the rotation device, the charge is rotated and crushed using a hydraulic cutting unit, characterized in that the pre-nozzle part of the housing is separated during rotation, then the grinding the head (IG) of the hydraulic cutting unit to the outer side of the body so that the cutting end of the IG is parallel to the surface of the body, and crush the annular portion of the body fastened with a charge with this head, and then lower water is added to the IG to the value necessary for grinding TRT, and a fraction of the charge under this ring is crushed into crumbs, then the indicated operations are repeated, completely eliminating the charge and body in parts.  2. The method according to claim 1, characterized in that the wet charge charge is used together with the water generated after liquidation of the charge as components in the manufacture of a water-gel industrial explosive.  3. The method according to claim 1, characterized in that the wet crumb of the housing and the charge is lobed in an environmentally friendly furnace.