RU2262068C2 - Method for elimination of solid propellant charge - Google Patents

Abstract

FIELD: elimination and salvaging of solid propellant rocket engines, and ammunition applicable in salvaging of charges of composite propellants being in the bodies of the solid propellant engines, providing for a hydrojet finishing of the charge within the body, gathering and extraction of solid propellant in the form of its lump fragments of various size for subsequent processing, for example, by the chemical method.

SUBSTANCE: the body with the charge of solid propellant is dipped in the working fluid, through the vent the body is washed out and the bottom dwelling of the charge fastened to it is extracted, separate the bottom by the mechanical or/and hydrojet method layer by layer in the axial direction, distruct the fastening coupling of the solid propellant to the body, separate the circular part of the body, making free the end layer of the charge, which is dissolved by mutually intersecting rows of slots into cantilerly projecting columns and finally distruct into lump fragments by sprays with a radially directed power action.

EFFECT: provided elimination of charges of composite solid propellants fastened to the bodies of rocket engines by large-fragment circular portions, cutting of the bodies and lump, various size finishing of solid propellant for subsequent processing, besides, enhanced is the capacity, reduced power consumption and provided safety in operation.

10 cl, 3 dwg

Description

The invention relates to the field of utilization of solid propellant rocket engines (RTTT) and ammunition (BP) and can be used for the disposal of mixed TRT charges (STRT) located in the solid propellant rocket propulsion tanks, providing hydro-jet cutting of the charge in the housing, collecting and removing STRT in the form of it lump fragments of various sizes for subsequent processing, for example, by a chemical method.

Liquidation of solid propellant rocket and explosive materials by disrupting the charge of STRT and explosives by high-speed flows of the working agent - a stream of water or a liquid heated coolant, a stream of ice-cold water granules or granules of carbon dioxide, or other working agents, and removing the destroyed STRT or explosives from the body, widely known and covered in the scientific and technical literature and patent sources [1 ... 8].

The disadvantage of technical solutions taken as analogues [1, 2] is that hydromonitor cutting (cutting) of charges into pieces of STRT begins in the channel of the initial (minimum) diameter and ends when the channel diameter of the leached charge reaches its outer diameter bonded to the body.

Depending on the size of the outer diameter of the charge and the range of the jet, the cutting (cutting) of the charge is carried out in layers in the radial direction, for which a jet head is used which is re-adjustable for each destructible layer of STRT, which, for placement in the channel and moving along the channel, is reassembled after each readjustment through the pole holes of the bottom of the housing, which complicates the process of cutting charge and reduces safety. In addition, safety is reduced due to the possible accumulation of fuel fragments evacuated by the flow of the working fluid in the bottom near the pole hole zone and / or their jamming in it, for example, during an avalanche-like inlet, with subsequent release and shock loaded on the surface used for the passage of the working liquid and fuel fragments of technological equipment.

The closest in technical essence analogue is a method of eliminating a charge of solid rocket fuel (TRT), bonded to a housing with inseparable bottoms, consisting in the fact that the charge with the housing is installed on a rotation device, while the cutting nozzle rotates with an ultrahigh pressure of water, the pre-nozzle part of the housing is separated and crushed his. After separating the pre-nozzle part of the body, the grinding head of the hydraulic cutting unit is brought to the outside of the body and the head portion of the housing, which is attached to the charge, is ground with this head, then the water pressure in the grinding head is reduced to the value necessary for grinding TRT, and the fraction of charge under this ring is crushed into crumbs , then repeat the indicated operations, completely eliminating the charge and the case in shares (see RU No. 2143660 with a priority of April 28, 1998).

The disadvantage of the method adopted as a prototype is that its implementation is difficult due to the lack of specific signs of technological operations of grinding the annular lobes of the body with a cutting jet of ultrahigh pressure water and grinding the reduced pressure of the annular parts of the TRT charge into crumbs of 6 × 3 × 3 mm by water jets.

The task of eliminating the charge of TRT in this way is solved only in principle, which complicates its direct implementation.

This method, due to the irrationally laborious grinding of the annular lobes of the housing to release the cylindrical surfaces of the annular parts of the TPT charge and the crumbly grinding of the TPT charge, implements low liquidation efficiency and, in addition, is fire and explosion safe.

So, when grinding the annular parts of the body fastened with a charge, despite the intense heat removal of the jet, the layers of the body in the cutting zone are heated, the highest value of which is achieved at the place of the dynamic action of the ultra-high pressure water jet on the body.

Since the organoplastic material of the casing has high physical and mechanical characteristics (tensile strength σ _in > 100 ... 150 kg / mm ² , the elastic modulus E≥0.6 · 10 ⁴ ... 0.8 · 10 ⁴ kg / mm ² ), the body itself - significant geometric parameters (wall thickness up to 30 ... 35 mm, diameter up to 2.5 m or more), then the impact of the cutting jet on the body, and hence the heating of the layers of the body, is a long-running process.

As a result of prolonged heating of the case, with a constantly decreasing thickness of the wall of the case, heating of the TPT layers adjacent to it in the cutting zone occurs, which, over time, can reach values that are dangerous from the point of view of initiating the irreversible thermal reaction of the TPT - flash, fire, explosion.

The small capacity of the crumb-shaped, 6 × 3 × 3 mm, size of the TPT charge grinding does not correspond to the higher productivity of the chemical processing of such crumbs in a single technological chain "Liquidation (cutting) of the TPT charge into fragments - utilization (processing) of TPT fragments by the chemical method". In addition, with this method of eliminating (cutting) the TPT charge, the total and specific consumption of the working fluid (water) is irrationally increased, and the technical resource of the equipment used in the work is quickly consumed.

The objective of the present invention is the creation of a process for the elimination of the charges of mixed solid rocket fuels, bonded to large (diameter up to 2.5 m or more) organoplastic bodies of rocket engines, by large-fragment, ring shares, cutting the bodies and lumps, cross-sectional sizes from 10 ... 15 mm to 40 ... 50 mm and more, cutting mixed TRT for subsequent processing, for example, by the method of chemical utilization, as well as increasing productivity, reducing energy costs and ensuring pretensioners at work.

This problem is solved in that the charge of mixed TRT prepared for elimination as part of the organoplastic body is immersed in the working fluid (flooded) to depths in the cut zones from 0.001 D ₃ to 0.5 D ₃ , where D ₃ is the diameter of the charge, the charge with the case is rotated , through the pole hole, the flooded jets of cavitating nozzles are cut (washed out) and the bottom, near the bottom, part of the charge bonded with it is removed, forming a cavity free of charge, mechanically and / or hydro-jet methods are separated by ring lobes or the whole bottom, with in which the cutting tool or jet enters the bottom cavity of the housing released from the charge part without directly affecting the remaining charge, layer by layer, in the axial direction, by means of the cavitating nozzle jet, they destroy the fastening connection between the TPT and the body, washing the parietal ring cavity at the periphery of the charge, the section axis of which parallel to the longitudinal axis of the charge, the annular portion of the body above the parietal annular cavity is separated by mechanical and / or hydro-jet methods, releasing the end layer of the charge, which they dissolve (cut) from the end side by mutually intersecting rows of slits, for example, 60 ... 300 mm deep, 3 ... 20 mm wide with a step equal to (1,0 ... 20,0) δ, where δ - the width of the slit on the surface of the layer, on cantilever-protruding columns of a prismatic or truncated-pyramidal, or approximate shape, then finally destroy the end layer into lump fragments by jets with a radially directed force and a working fluid pressure of (25 ... 125) σ, where σ is the tensile strength of the mixed TPT of the liquidated charge; end layers of charge are dissolve into cantilever protruding columns and finally destroy in the internal cavity of the body without destroying it into annular lobes after separation of the bottom; the bottom, near the bottom, part of the charge is cut out (washed out) in layers in the radial direction, for which each radial layer cuts through the longitudinal slots and a number of closed or spiral, radial or inclined at an angle from 45 ° to 90 ° to the longitudinal axis of the charge of the rings slots with a step equal to (1.0 ... 5.0) δ, where δ is the width of the slit on the surface of the layer, a ribbed layer is obtained, which is destroyed by crossing its ribs at an angle of 45 ° ... 90 ° next to the same ring slots and at the same time extract TRT in the form of segment fragments polygonal th section; in the process of separating the annular shares of the bottom and the body, to increase the safety of work due to the additional heat removal from the body from the back of the cutting zone, the working coolant is supplied to the cavities released from the charge part from a pressure of 0.05 MPa to 0.25 MPa with the possibility of it circulation and / or outflow; working coolant is fed into the zone opposite to the cutting zone; working coolant is supplied using cavitating nozzles cutting fuel; to increase the safety of work by organizing the collection of lump fragments of the TRT charge obtained as a result of cutting, and eliminating their unregulated movement to areas where they may pose an increased danger, for example, under the wheels of a rail carriage flooded with solid propellant rocket engines, the end layer of the charge through a commensurate inlet, excluding the passage of TRT lump fragments through mounting gaps, they are placed in the cavity of a flooded, perforated and / or mesh-lattice container with an open upper cut, section ku charge in lumpy fragments carried in the container, omitting cavitating nozzle for cutting through its upper open section after cutting the inlet of the container cover and the container with fragments retained therein TRT charge is removed from the working fluid for subsequent processing; the inlet of the container is blocked with a perforated or mesh-lattice shutter or a gate; the bottom bottom of the container is configured to open to extract lumpy fragments of charge, TPT; Toluene or acetic acid, which are part of the liquid for the chemical processing of TRT charge fragments, is used as a working medium of flooding, a cutting working fluid, and a cooling working fluid.

A comparison of the essential features of the prototype and the proposed method shows that the essential distinguishing features of the proposal are those in accordance with which:

- prepared for elimination, the charge of the STRT bonded to the body is immersed in the working fluid (flooded) to depths in the cutting zones from 0.001 D ₃ to 0.5 D ₃ , where D ₃ is the diameter of the charge;

- flooded jets of cavitating nozzles destroy the bonding connection of the TPT with the bottom of the body, and after its separation along the axial (end) layers of the TPT with the body, receiving near-wall parietal cavities;

- the mechanical or hydro-jet separation of the annular lobes of the bottom and the body is configured to exit the cutting tool or jet into the parietal annular cavities released from the charge without directly affecting the remaining charge;

- the end layer of the charge is dissolved (cut) from the side of the end by mutually intersecting rows of slots with a step equal to (1.0 ... 20.0) δ, where δ is the width of the slit on the surface of the layer, into cantilever protruding prismatic columns, or truncated pyramidal or close to them shape, after which each end layer is finally destroyed into lump fragments by jets with a radially directed force and a working fluid pressure equal to (25 ... 125) σ, where σ is the tensile strength of the mixed TPT of the liquid to be eliminated ;

- layer-by-layer radial cutting of the bottom of the charge is performed by cutting through the channel of longitudinal slots, intersecting rows of closed or spiral, radial or inclined at an angle from 45 ° to 90 ° to the longitudinal axis of the charge of the ring slots with a step equal to (1,0 .. .5.0) δ, where δ is the width of the slit on the channel surface, and the destruction of the obtained finned layer near the same annular slots intersecting the edges of the layer at an angle of 45 ° ... 90 °;

- the end layer of the charge through a commensurate inlet is placed in the cavity of a perforated or mesh-lattice container, the charge is divided into lump fragments in the cavity of the container through its open top slice, after which the inlet of the container is closed, and the container with the lump fragments of the TPT charge held in it removed from the working fluid for further processing.

The essence of this invention is illustrated by graphic images, where figure 1 shows the General scheme of cutting the end layer of the charge TRT in the housing of the flooded solid propellant rocket motor; figure 2 shows a diagram of the dissolution (cutting) of the end face of the charge TRT; figure 3 presents a diagram of the layered-radial cutting charge TRT in the area of the bottom.

According to the general scheme (Fig. 1), which shows the main operations for cutting the TRT charge after separation of the bottom, the charge of solid fuel 1 in the housing 2 of the rocket engine is mounted on the rotary rollers 3 of the rail carriage 4 and together with it is placed in a flooded pool or tank 5 Swivel casters and rail carriage are equipped with power drives (not shown).

The pool or tank 5 has a working area for the direct execution of the operations of cutting the charge TRT and cutting (destruction) of the body. In this zone, above the mirror of the pool or tank 5, for example, on a rail trolley 6, the hydraulic cutting equipment necessary for cutting (cutting) is placed. This equipment contains cavitating nozzles providing vertical discharge of the cutting stream (vertical cavitating nozzles) 7, horizontal cavitating nozzle 8, cutting head 9 in the form of a collector 10 with horizontal cavitating nozzles 11. Nozzles 11 are placed along the collector 10 with predetermined, mainly equal, steps.

The specified hydraulic cutting equipment is installed on the trolley 6 with the possibility of lowering it into the flooded working area of the pool or tank 5. The rail trolley 6 has the ability to move horizontally at right angles (in plan) to the longitudinal axis of charge 1 and housing 2, as well as its fixed stop in any location of the working area of the pool or tank 5. The pool or tank 5 is equipped with at least one drain (bottom) and one overflow (top) holes for setting the initial level of the mirror of the working fluid (medium) 12 before bot and to maintain a given level in the process (not shown). A variant of the overflow (upper) hole is the hole formed by the upper edge of the pool or tank 5.

Figure 1 also shows a diagram of the collection of lump fragments of the charge TRT in the process of cutting into a container. The container 13 is made in the form of a container with an open top cut (open top) 14, and the walls and bottom are perforated and / or mesh-lattice. The container 13 is placed in the flooded working area of the pool or tank 5. In the cavity of the container, through the inlet 15 made on its front wall, the portion of the charge TPT 1 to be cut is placed. Between the end of the charge and the rear wall of the container, a normalized working gap is established in which when lowering through the open top of the container 13 place a horizontal cavitating nozzle 8 and a cutting head 9. Within the normalized gap, the initial (initial) distance between the end surface of the charge is established and output sections of cavitating nozzles 8, 11, for example, using brake shoes 16 with drives for their positioning and locking devices (not shown). Brake shoes 16 are installed on the rails towards the movement of the trolley 4 in the working area and serve to prevent unauthorized mechanical contact and damage to the charge TRT 1, nozzle 8, head 9, container 13, trolley 4, pool or tank 5.

The container 13 for providing opening and closing of the hole 15 is provided with a perforated or mesh-lattice shutter or gate 17. The bottom 18 of the container is made with the possibility of opening it for unloading the resulting fragmented and collected lump fragments of the TPT charge.

Figure 2 shows the radial sections of the horizontal cavitating nozzle 8 and nozzles 11 of the cutting head 9, lowered into the working area of the pool or tank 5, and the charge TRT from its end after dissolution (cutting) by jets of these nozzles.

The nozzle 8 is brought to the end of the charge at its upper point with the possibility of leaching, when the charge rotates, on its periphery of the parietal annular cavity 19.

Nozzles 11 are brought to the end of the charge in its upper half with the possibility of cutting through the horizontal movement of the cart 6 relative to the stationary charge of the TRT, horizontal slots 20 and receiving, alternating between cutting and scrolling the charge of the TRT 90 °, 180 °, 270 °, 360 ° cantilever protruding columns 21.

Depending on the set dimensions of the cantilever-protruding columns 21 and the charge diameter D _{3, the} nozzles 11 are placed along the collector of the cutting head 9 with different, mostly equal, steps; the number of nozzles 11 may be other than that shown in figure 1, figure 2.

Figure 3 shows the TPT charge attached to the housing in the bottom zone with a pole hole and a diagram of its layer-by-radial cutting and removal. On figa shows a cutting scheme of the first radial layer 22 (figb) of the charge of mutually intersecting annular slots 23, 24, longitudinal slots 25 and the resulting ribs 26 of the annular shape and fragments 27 of the segmental shape.

To cut the annular slits 23 through the bottom hole of the bottom into the charge channel enter a multi-nozzle cutting head 28 with nozzles 29. To cut the annular slots 24 into the charge channel enter a multi-nozzle cutting head with correspondingly mounted nozzles similar to the head 28 with nozzles 29 (not shown).

To cut the longitudinal slots 25, a nozzle or nozzle head is introduced into the charge channel, for example, in the form of a cross (not shown).

On figb shows a variant of a three-layer radial cutting and removal of charge TRT in the area of the bottom with a pole hole. The first radial layer 22, divided into segment fragments 27 (Fig. 3a), and similarly divided into segment fragments layers 30, 31 (not shown) are conventionally shown as integral, which shows the charge form of TPT 1 after cutting and removal of each of the radial charge layers 22 , 30, 31, respectively.

On figb also shows the annular lobes of the bottom 32, 33, 34, and figa - nozzle 35, the jet of which cut off the annular lobes of the bottom 32, 33.

To carry out the elimination of the TPT charge fastened to the rocket engine body using this method using the devices and equipment described above, the TPT 1 body 2 is mounted on the rail carriage 4, placed in the working area of the pool or tank 5, and flooded with working fluid 12 (Fig. 1) . A nozzle or nozzle head in the form of a cross and multi-nozzle cutting heads is sequentially introduced into the flooded charge channel TPT 1 through the pole hole of the bottom of the housing 2 (Fig. 3). The working fluid is supplied to them, the longitudinal slots 25, the annular slots 24, 23 of the first radial layer 22 are cut through the nozzles flowing from the nozzles, and they are removed with the working fluid flow in the form of segment fragments 27. The longitudinal slots 25 are cut when the nozzle or nozzle head is linearly fed into in the form of a cross relative to the axis of the charge channel. The number of longitudinal slots 25 is assigned depending on the diameter of the charge channel to prevent jamming of the removed segment fragments 27 in it. The annular slots 24, 23 are cut when the TPT charge rotates on the rotary rollers 3. The steps of the annular slots 24, 23 provide an appropriate arrangement of nozzles along the multi-nozzle collector cutting heads or their periodic linear feed along the axis of the channel for a given step (with a small number of nozzles of a multi-nozzle cutting head). The step size is assigned in the range (1.0 ... 5.0) δ, where δ is the slot width on the cylindrical surface of the charge channel, from the condition of obtaining the cross-sectional dimensions of the segmented charge fragments from 10 ... 15 mm to 40 ... 50 mm for further high-performance chemical processing of TPT fragments. The angle of inclination of the annular slots 24 to the longitudinal axis of the charge TRT set in the range from 45 ° to 90 °. The actual value of this angle is assigned mainly from the condition of complete or maximum possible cleaning of the bottom of the housing from fuel in the wall ring gap.

The ribs 26 of the layer 22 resulting from the cutting of the annular slots 24 are destroyed by the annular slits 23 crossing them at an angle of 45 ° to 90 °.

After extracting from the internal cavity of the rocket engine fragments 27 of the first charge layer 22 and the cutting head 28 with a jet of ultrahigh pressure fluid flowing out of the nozzle 35, the annular portion 32 of the bottom is cut off. The nozzle 35 is then brought to the outer surface of the bottom in the upper part of the cavity released from the first charge layer 22. Cutting and removal of radial charge layers 30, 31, a segment of the annular share of the bottom 33 is performed similarly to cutting and removal of the layer 22, a segment of the annular share of the bottom 32. The cutting of the last ring share of the bottom 34 or the bottom is entirely carried out by a jet of ultrahigh pressure working fluid flowing out of the nozzle 7 ( figure 1). The nozzle 7, while bringing to the outer cylindrical surface of the housing 2 in the area released from the charge of the internal cavity.

For further cutting of the charge TRT 1 after the above separation of the bottom of the housing 2 in the working area of the pool or tank 5 lower the horizontal cavitating nozzle 8 (figure 1), bring it to the end of the charge at the top point (figure 2) and a flowing stream of working fluid, when rotation of the charge, cut through (wash out) the parietal annular cavity 19, destroying in this zone the bond between the charge and the casing, a stream of ultrahigh pressure working fluid flowing out of the nozzle 7, cut off the annular, cylindrical part of the casing over the annular cavity 19, whereby the release socket for cutting charge layer.

The cut of the cylindrical annular part of the housing is possible in another, for example mechanical, way in which the tool in the process of cutting goes into the annular cavity 19 without exerting a mechanical effect on the charge of the TRT. To reduce the thermal effect on the charge that occurs when a segment of the annular lobe of the body is cut by hydraulic, or mechanical, or other means, a working fluid with pressure from 0.05 MPa to 0.25 MPa with the possibility of its circulation and / or outflow.

To increase the efficiency of heat removal, cooling working fluid is fed into the zone of the segments of the annular portion of the body, the opposite (back) cutting zone.

Coolant is supplied using cavitating nozzles designed for cutting fuel.

To cut the end layer of charge in the working area of the pool or tank 5, lower the cutting head 9 with horizontal cavitating nozzles 11 (Fig. 1) and bring them to the end of the charge in its upper half (Fig. 2). The immersion depth of each of the nozzles 11 is different and is in the range of the depths of flooding of the upper half of the charge TPT 1 and the housing 2. The flooding of the charge TPT 1 is performed so that the upper generatrix of the cylindrical body 2 is at a depth from the mirror of the working fluid (medium) 12 within 2. ..20 mm, which corresponds to the immersion depth range of the upper half of the TPT 1 charge and case 2 0.001 D ₃ ... 0.5 D ₃ , where D ₃ is the diameter of the charge, mm.

At the first stage of cutting the end layer of the charge, the working fluid is fed into the cutting head 9 and the jets of working fluid flowing out of the nozzles 11, with a fixed-fixed charge TPT 1 and horizontal movement of the cutting head 9 on the rail carriage 6, horizontal slots 20 are cut.

Alternating the scrolling of the TPT 1 charge through angles of 90 °, 180 °, 270 °, 360 ° with the cutting of horizontal slots 20, the end layer of the TPT 1 charge is dissolved into cantilever-protruding columns 21 of a prismatic or truncated-pyramidal or approximate shape. The pitch of the slots 20 is provided by the corresponding arrangement of the nozzles 11 on the cutting head 9 or by their periodic immersion (or ascent) by a predetermined pitch (with one or a small number of nozzles). The step size is assigned in the range (1.0 ... 20.0) δ, where δ is the width of the slit on the surface of the end of the charge, from the condition of obtaining the cross-sectional dimensions of the cantilever-protruding columns from 10 ... 15 mm to 40 ... 50 mm and more to ensure the subsequent high-performance process of chemical processing of TPT fragments.

The second, final stage, cutting the end layer of charge is performed by the jets of the working fluid flowing out from the vertical cavitating nozzles 7. At this stage, the nozzles 7 are brought to the lateral surface of the dissolved end layer of the charge (Fig. 1), the working fluid is supplied with pressure (25 .. .125) σ, where σ is the tensile strength of TPT, and, by rotating the charge of TPT 1, cantilever protruding columns 21 are cut off and lump fragments of TPT charge of a given size are obtained.

Full cutting of the cylindrical part of the charge TRT 1 is carried out periodically repeating the following operations: supply charge TRT 1 in the working area of the pool or tank 5; cutting through the parietal annular cavity 19 and the segments of the annular part of the body above the cavity 19; the dissolution of the end layer of the charge on the console protruding columns 21; segments of cantilever-protruding columns 21 and receiving lump fragments of the charge TRT.

To limit the uncontrolled, in the flows of the working fluid, the movement of lump fragments of the TPT charge through the pool or tank 5 and their collection during cutting, the end layer of the TPT charge 1 is placed through a commensurate inlet 15 into the cavity of a perforated or mesh-lattice container 13 with an open top slice 14 The upper slice 14 is placed above the overflow hole of the pool or tank 5. Cutting the end layer of the charge TRT into lump fragments is carried out by immersing the nozzle 7, 8, the nozzle head 9 in the working area through indoor upper section 14 of the container 13. The size, such as diameter, perforations or a grid cell (lattice) of the container 13 determined depending on the charge TRT fragments lumpy sizes for preventing their unauthorized exit from the cavity of the container.

The number of holes (perforations) on the walls and bottom of the container 13 is assigned from the condition of rapid outflow of the working fluid from the cavity of the container when removed from it.

After the accumulation in the cavity of the container 13 of a given portion of lumpy fragments of the TPT charge, the inlet 15 is blocked by a perforated or mesh-lattice damper or gate 17.

Lump fragments of the TPT charge, collected and held in the cavity of the container 13, are removed from the working fluid - medium 12 and sent for further processing.

The bottom bottom 18 of the container 13 is configured to open to extract lump fragments of the TPT charge.

Toluene or acetic acid, which are part of the destructive liquid for the chemical processing of lump fragments of the TRT charge, is used as the flooding medium 12, cutting fluid and coolant, which allows them to be processed without going through preparatory operations.

The possibility of carrying out the invention is also confirmed by the results of cutting charges of mixed solid fuels using water and toluene.

Charged were the charges of two types of mixed solid fuels with the following physical and mechanical characteristics similar to the characteristics of real composite TRT used in mid-flight engines:

σ ₁ = 0.50 ... 0.59 MPa, ε ₁ = 62 ... 90%, E ₁ = 1.0 ... 1.5 MPa;

σ ₂ = 0.32 ... 0.44 MPa, ε ₂ = 40 ... 60%, E ₁ = 1.2 ... 2.4 MPa,

where σ ₁ , σ ₂ - tensile strength of two types of fuels; ε ₁ , ε ₂ - elongation of fuels; E ₁ , E ₂ - modulus of elasticity of fuels at 10% elongation.

The cutting was carried out by flooded jets of a cavitating nozzle with a diameter of its critical section d = 0.8 mm at distances from the nozzle exit section to the charge surface from 20 to 40 mm and in the pressure range of the cutting working fluid from 10 MPa to 34 MPa.

As a result of cutting, cuts (slots) were obtained, the maximum depth of which was from 100 to 160 mm, the width on the surface of the charge from 3 ... 4 mm to 10 ... 12 mm.

The obtained results of the cutting depth equal to (125 ... 200) d, the possibility of increasing the cutting depth by increasing the nozzle diameter allows us to realize the proposal and achieve the desired (acceptable) cutting performance of large-sized bonded charges of mixed TRT.

Sources of information:

1. Monroe J.W. et al. U.S. Patent No. 3312231, 1967.

2. Scott L.B. U.S. Patent No. 3440096, 1969.

3. Conn A.F., Gracey M.T. 9th International Symposium on Jet Cutting Technology, Craufieid, BHRA, 1988, p. 307-322.

4. Patent RU No. 2163342, IPC F 42 V 33/06, C 06 V 21/00, F 42 D 5/04. The method of leaching mixed solid fuel from the rocket engine housing, 1999

5. Patent RU No. 2101672, MKI 6 F 42 V 33/06, C 06 V 21/00. Ammunition demilitarization method, 1995.

6. Patent RU №2127419, MKI 6 F 42 V 33/00, C 06 V 21/00. Ammunition stocking method, 1997.

7. PU patent No. 2142420, MKI 6 F 42 V 33/00, C 06 V 21/00. Ammunition stocking method, 1997.

8. Patent RU No. 1795962, MKI 5 C 06 V 21/00. The method of destruction of products from explosives with the simultaneous disposal of explosives, 1991.

9. PU patent No. 2143660, MKI 6 F 42 V 33/06. The method of eliminating charges of solid rocket fuel (TRT), 1998.

Claims (10)

1. A method of eliminating a charge of solid rocket fuel (TRT), bonded to a housing with inseparable bottoms with pole holes, comprising splitting the TRT charge with a working fluid, in which slots are cut through the surface of the charge with high-speed jets of cutting nozzles, and extracting fragments of the destroyed fuel, characterized in that that the case with the TRT charge is immersed in the working fluid in the cut zone to a depth of (0.001-0.5) D ₃ , where D ₃ is the diameter of the charge, the bottom part of the charge bonded to it is washed and removed through the pole hole, they are separated by a chanical and / or hydro-jet method in annular lobes or the entire bottom with the exit of the cutting tool or jet into the bottom cavity of the housing released from the part of the charge, the bond between the TPT and the housing is broken down in layers, for which a wall axial cavity is washed out at the periphery of the cavitating nozzle, the cross-section of which is parallel to the longitudinal axis of the charge, mechanically and / or by hydro-jet separation of the annular lobe of the body above the parietal annular cavity, releasing the end layer charge, which is spread from the side of the end by mutually intersecting rows of slots with a step equal to (1.0 ... 20.0) δ, where δ is the width of the slit on the layer surface, onto cantilever protruding columns of prismatic, or truncated-pyramidal, or approximate forms to them, after which they finally destroy the layer into lump fragments by jets with radially directed force and pressure of the working fluid equal to (25-125) σ, where σ is the tensile strength of the leached solid fuel. 2. The method according to claim 1, characterized in that the end layers of the charge dissolve into cantilever protruding columns and finally destroy into lump fragments in the body cavity. 3. The method according to claim 1, characterized in that the bottom part of the charge is washed layer-by-layer in the radial direction, for which longitudinal slots and a series of closed or spiral, radial or inclined at an angle from 45 to 90 ° to the longitudinal are cut through each layer the axis of the gap charge with a step equal to (1.0-5.0) δ, where δ is the width of the gap on the surface of the layer, the resulting finned layer is destroyed by crossing its ribs at an angle of 45-90 ° by a number of the same cracks and simultaneously remove TRT in the form segment fragments of a polygonal section. 4. The method according to claim 1, characterized in that in order to increase safety by additional heat removal during the separation of the annular shares of the bottom and body, the working coolant is supplied with a pressure from 0.05 to 0.25 MPa with the possibility of its circulation and / or outflow. 5. The method according to claim 4, characterized in that the working coolant is fed into a zone opposite the cutting zone. 6. The method according to any one of claim 4 or 5, characterized in that the working fluid is supplied using cavitating nozzles. 7. The method according to claim 1, characterized in that the end layer of the charge through a commensurate inlet is placed in the cavity of a perforated or mesh-lattice container, the charge is cut into lump fragments in the cavity of the container through its open top section, after which the inlet of the container is closed and the container with the lump fragments of the TPT charge held therein is removed from the working fluid for further processing. 8. The method according to claim 7, characterized in that the inlet of the container is blocked by a perforated or mesh-lattice damper or gate. 9. The method according to any one of p. 7 or 8, characterized in that the lower bottom of the container is performed with the possibility of opening it to extract lumpy fragments of the charge TRT. 10. The method according to any one of claims 1 to 9, characterized in that toluene or acetic acid, which are part of the destructive liquid, is used as the working medium of flooding, cutting working fluid and cooling working fluid.

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