197 results about "Shaped charge" patented technology

The invention relates to the technical field of arc shaped energy-gathered blasting parameter design, and provides an arc shaped energy-gathered blasting parameter design method under a complex crustal stress condition, which comprises the following steps: establishing a double-hole blasting three-dimensional model comprising a rock mass, an arc explosive, an energy-gathered pipe and coupled air, applying a crustal stress boundary condition and carrying out stress initialization; setting material model parameters based on the test data; performing fluid-structure interaction dynamic response numerical simulation on the model by adopting LS-DYNA to obtain stress and strain response caused by blasting; and establishing evaluation indexes based on tensile stress, compressive stress and through crack formation, carrying out sensitivity analysis and optimization adjustment on key blasting parameters such as blast hole spacing, delayed detonation time, explosive loading amount and coupling coefficient, and finally determining an optimal blasting parameter combination in different stress states. The method can effectively meet the blasting operation requirement under the complex ground stress condition, the presplitting quality and the rock mass stability are remarkably improved, and the method has wide engineering application prospects.

In a MSCJ warhead detonation of the main charge is controlled to provide elevated pressure at multiple locations on the back surface of the liner to cut the liner and to form and propel forward a plurality of SCJs. An initiation system is configured for multi-point initiation of a plurality of booster charges to detonate the main charge to produce a plurality of detonation waves that constructively interfere at multiple locations on the back surface of the liner to form pressure hot spots that cut the liner and to form and propel forward a plurality of SCJs. In different embodiments, the elevated pressures are between 110% and 200% of the detonation pressure at the front of an individual detonation wave. The liner may, for example, include a plurality of recesses such as shallow dimples or deeper conical structures in which case the boosters are aligned to the center of the recessed structures.

Provided herein are shaped-charges having curved walls to provide better controllable and improved liquid jet parameters. The shaped-charge comprises a container having a plurality of curved walls for containing a liquid. One or more explosive charges are immersed in the liquid and a detonator channel positioned through the container wall to controllably detonate the one or more explosive charges and from a wedge-shaped liquid jet. Multipoint initiation is achieved using a number of initiation points; a location of one or more initiation contact points with the geometrically-shaped explosive charges; and / or an initiation timing of each of the initiation contact points, including simultaneous initiation or a sequence of initiations. Also provided are related methods of forming liquid jets and attendant applications, including target disruption.

Provided herein are mass focusing shaped charges and related methods useful for disrupting targets in either underwater or on land. The mass focusing shaped charges comprise an explosives shell having an explosives shell surface, wherein at least a portion is curved and defines an inner volume configured to contain an inner volume of fluid or a metal liner. A distal body is comprising a SMART material is positioned between the inner volume of fluid and a to-be-disrupted target. A conformable layer of explosives conforms to at least a portion of a surface of the explosives shell, the conformable layer of explosives configured for explosive initiation by a detonator. Upon explosive initiation the inner volume of fluid or metal liner is forcefully ejected to form a fluid or metal jet in a direction through the distal body and toward the target.

A linear shaped charged Electro-Explosive (LSCe) Device includes an initiator in direct and intimate contact with an exposed portion of the LSC's main charge. In different configurations, the initiator's package, initiation charge or initiation circuit (acting over a gap) are in direct and intimate contact with the main charge. The LSCe device may be manufactured by connecting a packaged initiator to an opening in the LSC housing through which a portion of the main charge is exposed or by forming the initiator in situ in a receptacle coupled to the housing around the opening. The LSCe device can be used for such applications as thrust or mechanical termination of an airframe, cable cutting or initiation of a LSC.

A liner for a shaped charge having integrated tracers. The liner, when the associated shaped charge is detonated, does not create a plug, carrot, or residue in the created perforation tunnel. The liner includes integrated tracers that, after detonation, are scattered into the perforation tunnel and then begin to flow back in formation fluid flow and are identifiable in the flow.

A method of using a tracer additive in a wellbore that includes using a perforator device, the perforator device having an at least one shaped charge associated with the tracer additive. The method includes deploying the perforator device into the wellbore in manner whereby the perforator device arrives at a desired location, and sufficiently detonating an explosive material of the shaped charge so that the tracer additive comes into contact with a target formation. The tracer additive has a first composition, and is in powder form.

A perforating gun system. The perforating gun system comprises a gun barrel housing, and a pair of tandem subs threadedly connected to the gun barrel housing at opposing ends. The perforating gun system also includes a rail. The rail defines an elongated frame having a plurality of receptacles, wherein each receptacle is configured to receive a shaped charge. A ballast is connected to each of opposing ends of the rail. Each ballast supports a bearing member which interfaces with a central bore of a respective tandem sub. In this manner, relative rotation is provided between the rail and the first and second tandem subs. A method of orienting shots in a perforating gun assembly is also provided.

A perforating gun is disclosed with shaped charges at a preferential orientation. An example includes a gun body and a charge carrier disposed within the gun body. The charge carrier defines a longitudinal carrier axis and has a plurality of axially-spaced charge mounting locations. A plurality of charges are each pivotally mounted to the charge carrier at one of the respective charge mounting locations about a charge pivot axis transverse to the longitudinal carrier axis. The charges may preferentially align in response to gravity so their orientation remains constant throughout a range of inclination of the wellbore.

The invention provides an activity-considered energy-gathered jet flow pit opening caliber acquisition method, which comprises the following steps of: firstly, constructing a pressure equation for describing a jet flow penetration target plate side, and then calculating a pit opening radial speed of a target material by describing the pressure equation for describing the jet flow penetration target plate side in combination with a relation between a pit opening radial speed and a penetration speed of a target plate; then, assuming that the product of the pressure on the target plate side and the pit digging area is unchanged, and determining the relation of the pressure changing along with the area and the initial pressure on the target plate side; and determining the change relation of the pit digging radius along with time by combining the initial pit digging condition of the target plate side, and finally obtaining the maximum pit digging radius. The method is reasonable in conception, can be widely applied to novel active energy-gathered jet flow, and can efficiently and accurately predict the pit digging radius.

A perforating gun includes a gun assembly and a gun barrel. The gun assembly includes a charge tube comprising at least one shaped charge. A pin contact assembly is operably attached to a first end of the charge tube and includes a contact spacer and a through pin configured to provide electrical communication between respective perforating guns. An addressable switch assembly is attached to a second end of the charge tube and comprises an addressable switch and a detonator. The gun assembly is situated within the gun barrel and is configured to self-orient inside the gun barrel.

This invention provides a stress relief blasting method based on the control of diffuse reflection of stress waves. This method involves placing a diffuse reflection sphere at the bottom of the borehole. The sphere's surface contains raised structures, which form a diffuse reflection surface for stress waves. Compared to existing shaped charge stress relief blasting technologies, in this invention, when the explosive detonates inside the borehole, the raised structures on the diffuse reflection sphere at the bottom of the borehole allow the explosive impact to be reflected more evenly to the nearby rock mass in the stress relief section of the borehole. This results in uniform fracturing of the surrounding rock, forming a uniformly fractured zone perpendicular to the borehole axis rather than a primary crack in a specific direction. This significantly reduces the bearing capacity of the surrounding rock near the borehole in the stress relief section, shifting the stress concentration zone away from the tunnel face, reducing the risk of rockburst during deep tunnel excavation, and better ensuring construction safety.

The application discloses a flexible shaped charge cutting device and a magnetic attraction type rapid deployment method, relates to the technical field of shaped charge cutting, and is characterized in that the one side of a movable block is connected with an arc-shaped clamp, cutting pipes are embedded between two adjacent arc-shaped clamps, a storage cavity for explosives and a storage cavity for water are arranged in the cutting pipes, a shaped charge plate is bonded to the side of the cutting pipe close to the storage cavity for explosives, the storage cavity for explosives is filled with cutting explosives, the other side of the rectangular frame is connected with a protective plate, and a plurality of sound absorption holes are arranged on the surface of the protective plate. The bonding of the double-sided adhesive and the fixation of the arc-shaped clamp on the cutting pipe enable the cutting pipe to be closely attached to a wall surface, thereby guaranteeing the stability of cutting. The fixation of the arc-shaped clamp on the cutting pipe prevents the elastic rebound of the cutting pipe and enables the cutting pipe to be stably fixed on a curved wall surface. When cutting and blasting are performed, the high-speed jet flow formed by the shaped charge plate can optimally cut the wall surface, the device has good cutting effect, and is suitable for a wide range of applications.

The invention belongs to the technical field of deep underground target penetration, and particularly relates to an energy gathering / kinetic energy series penetration structural body which comprises a charging shell, the front end of the charging shell is provided with an opening, a shaped charge liner is arranged at the opening of the front end of the charging shell in an adhesive mode, the rear end of the charging shell is fixedly connected with a rear-stage connecting part, and the rear-stage connecting part is fixedly connected with the charging shell. The rear end of the rear-stage connecting part is connected with a rear-stage main projectile body, a charging buffer layer is arranged at the front end of an inner cavity of the rear-stage main projectile body, a rear-stage fuze is installed at the rear end of the rear-stage main projectile body, and the charging shell and the rear-stage main projectile body are both filled with gunpowder. Wide-speed-range penetration is achieved through the series connection structure, the rear-stage connecting part extends into the charging shell to be in threaded connection with the charging shell, the rear-stage connecting part is protected against damage by utilizing three-direction pressure stress generated by explosive detonation, meanwhile, the length of the rear-stage connecting part can be adjusted, the rear-stage connecting part is used for protecting a penetration projectile body structure under the condition of different penetration target-hitting speeds, and the penetration target-hitting speed is improved. And therefore, the purpose of increasing the penetration power is achieved.

The present invention discloses a method for analyzing the vulnerability of concrete piers under the action of shaped charges, specifically, performing structural analysis on the target concrete pier and characterizing the projectile-target intersection conditions; using the residual height of the destroyed concrete to characterize the damage level of the destroyed concrete pier; obtaining residual height data of the shaped charge on the concrete pier under different shaped charges, different attack directions, and different action positions through simulation analysis or experiments; obtaining equal damage curves of different damage levels of the concrete pier; calculating the vulnerable area through a damage probability calculation function; and then judging and selecting appropriate attack conditions. Compared with the prior art, the present invention, based on the characteristics of the concrete pier structure, adopts a method combining experiments and numerical simulations to study the damage of the shaped charge on the concrete pier, obtain the damage criterion for the concrete pier, and construct a vulnerability characterization and evaluation method for the concrete pier under the action of the shaped charge.

This invention discloses an adjustable shaped charge device and its blasting method for bench blasting in open-pit mines, relating to the field of engineering blasting technology. The adjustable shaped charge device includes: an adjustable shaped charge liner, lifting holes, a sheath, a transverse groove, a cross-shaped buckle, an adjustable liner, linear shaped charge slots, and a bottom cylindrical counterweight. Lifting holes are provided on both sides of the top of the adjustable shaped charge liner. A sheath and a transverse groove are provided on the upper part of the inner wall of the adjustable shaped charge liner. The sheath is detachably connected to the adjustable liner via cross-shaped buckles. The linear shaped charge slots are provided at both ends of the adjustable liner, and the bottom of the adjustable liner is fixedly connected to the bottom cylindrical counterweight. The entire adjustable shaped charge device is placed at the bottom of the blast hole. This invention solves the problems of uneven energy distribution, unstable fragmentation effect, and high root ratio and large block ratio in existing technologies under complex rock strata conditions.

The present application relates to the technical field of tunnel blasting, in particular to a kind of energy-gathering tube smooth blasting tool and construction process.The tool includes tool main body, and the tool main body includes installation strip;Explosive roll is equipped at the side wall of installation strip;Explosive roll includes sleeve, and sleeve inside is equipped with energy-gathering tube;The one end of energy-gathering tube that extends sleeve is equipped with energy-gathering cover;Energy-gathering tube side wall is equipped with strip-shaped hole;The distance between the side wall of both ends of strip-shaped hole gradually increases from the one end of energy-gathering tube close to energy-gathering cover to the other end of energy-gathering tube.The process includes S1, mark installation hole position;S2, drill installation hole;S3, energy-gathering tube assembly;S4, middle explosive roll production;S5, bottom explosive roll production;S6, explosive roll installation;S7, hole drilling;S8, connection, detonation;For the defects in the prior art, the present application can solve the problem that the amount of powder is reduced after the energy-gathering tube is loaded into the emulsified explosive shell, and the explosion power of emulsified explosive can be improved under the condition that the amount of powder is not convenient.

The utility model provides an energy-gathered cutter fixing device for dismantling a steel tower I-shaped steel stand column, which comprises a rotating seat, supporting legs are arranged at the bottom of the rotating seat, and a mounting seat is arranged at the top of the rotating seat. A first linear energy-gathered cutter making contact with a wing plate on one side of the I-shaped steel and two second linear energy-gathered cutters arranged in a notch of the I-shaped steel in a clamped mode are arranged on the installation base, and charges are arranged in the first linear energy-gathered cutter and the second linear energy-gathered cutters. Energy-gathered grooves of the first linear energy-gathered cutter and the second linear energy-gathered cutter face the I-shaped steel, and electric detonators are arranged in the energy-gathered grooves. According to the utility model, stable support is provided for the shaped charge blasting tool, the stability of the device during working is ensured, and the safety risk is greatly reduced; precise positioning blasting of the I-shaped steel stand column of the steel tower is achieved, the dismantling precision is greatly improved, the situation of incomplete dismantling or excessive dismantling is effectively avoided, and the quality of dismantling engineering is improved.

The application discloses a center screw condensation type shaped charge structure. The application can improve the collapsing speed of a liner 5 and reduce the jet stretching duration by setting a coaxial wave controller in a main charge without changing the existing shaped charge warhead structure, and the center screw is arranged at the center part of the liner, the thread on the screw is used for guiding the jet element, so that the speed of the jet element is reduced, the jet speed gradient is reduced, the jet element speed gradient formed by the collapsing of the liner is controlled, and the continuous fracture of the jet under different burst heights is ensured, so that the multipurpose application of the shaped charge warhead under different projectile-target action conditions can be effectively improved.

The utility model belongs to the technical field of tunnel blasting construction, and particularly relates to a combined energy gathering pipe which comprises an energy gathering pipe body and a graduated scale. Grooves are formed in the energy gathering pipe and comprise the first groove and the second grooves, the first groove is located between the two V-shaped energy gathering grooves, the distance between the first groove and the two V-shaped energy gathering grooves is consistent, the number of the second grooves is two, and the second grooves are formed in the sides, away from the first groove, of the two V-shaped energy gathering grooves in a mirror image mode. The graduated scale comprises a first graduated scale body and second graduated scale bodies, the first graduated scale body can be inserted into the first groove, the outer surface of the first graduated scale body is attached to the inner surfaces of the second grooves, the number of the second graduated scale bodies is two, and the two second graduated scale bodies are inserted into the two second grooves respectively. The device has the advantages that the interval charging distance is effectively controlled, the cutting direction of the energy gathering groove is accurately controlled, and the graduated scale can be recycled.

This invention discloses a blasting device and a rock blasting method, relating to the field of rock blasting technology, which can improve construction efficiency. The blasting device includes a shell, a first shaped charge liner, and a second shaped charge liner, the first and second shaped charge liners being disposed opposite to each other; both the first and second shaped charge liners are parabolic metal liners; the shell includes a first outer wall and a second outer wall, the first and second outer walls being disposed opposite to each other, the first shaped charge liner being fixedly connected to the left side of the first outer wall and the left side of the second outer wall respectively, and the second shaped charge liner being fixedly connected to the right side of the first outer wall and the right side of the second outer wall respectively; the cavity formed by the first outer wall, the second outer wall, the first shaped charge liner, and the second shaped charge liner is used to store explosives. This invention is applied to rock blasting scenarios.

The invention discloses an energy-gathered expansion metal pipe patching device, which utilizes chemical energy released by explosive detonation to extrude a high-elongation special steel pipe to an underground casing damage well section through directional overpressure shock waves generated by modular energy-gathered charging, and expands the original drift diameter to achieve the purposes of diameter expansion and sealing. A hydraulic power source and a conveying pipe column are not needed, the outer diameter of the sealing patching pipe is small, the sealing patching pipe can be lowered to a target patching position easily, and the sealing patching pipe has the advantages of being high in energy utilization rate, high in sealing pressure-bearing index, convenient in construction process, low in cost, high in work efficiency and short in operation period and is suitable for large-scale industrial use and popularization.

The utility model relates to the technical field of tunnel portal blasting cleaning construction, in particular to a charging structure for tunnel portal post-disaster blasting cleaning. A detonating cord of the energy-gathered charging structure is installed in the middle of an energy-gathered pipe, and the energy-gathered pipe is filled with explosives. The energy gathering pipe comprises energy gathering petals and buckles, the multiple energy gathering petals surround to form a tubular structure, and the ends of the adjacent energy gathering petals are connected through the buckles. And an energy-gathering groove is formed in the energy-gathering petal. The shaped charge structure is composed of a shaped section and a buckle to form a shaped tube so as to facilitate quick charge and mounting of a detonating tube, the length of the shaped charge structure can be cut on site according to the depth of a blast hole, the shaped charge structure can adapt to adverse environmental conditions of field disaster relief, and the shaped charge structure is simple to operate, can be processed on a construction site, has low requirements on a processing environment and can realize simultaneous processing and blast hole charge. The construction speed is high, and the applicability is high. In the construction process, different numbers of energy-gathering petals can be selected to form energy-gathering pipes of different sizes in a surrounding mode, and the energy-gathering pipes can well adapt to drilling holes corresponding to current construction equipment.

This invention provides a modular shaped charge blasting cutting device and its assembly method. The assembly involves first inserting one end of the outer shell into the first sleeve of the connector, placing the outer shell on a support plate with its through-hole facing downwards, and then inserting a metal shaped charge shield into the outer shell with its opening facing downwards. The first pre-tightening component is then adjusted and tightened. Similarly, the assembly involves inserting one end of the outer shell into the second sleeve of the connector, placing the outer shell on a support plate with its through-hole facing downwards, and then inserting a metal shaped charge shield into the outer shell. The second pre-tightening component is then adjusted and tightened. The connector and the separately designed standard cutter components of this application allow for flexible assembly of shaped charge blasting cutting packages, enabling the shaped charge blasting cutting device to be adaptively adjusted as needed. This solves the technical problems of poor cutting efficiency and unsatisfactory cutting effects in existing devices.

The invention provides a smooth blasting method containing an induction structure and a self-locking cartridge bag, and relates to the technical field of blasting control in geotechnical engineering and mineral engineering. According to the method, a hole arrangement optimization algorithm oriented to rock mass structure characteristics is constructed, an hourglass type charging structure with a multi-section energy zoning function is designed, a pre-blasting induced crack forming technology and an in-hole cartridge bag self-locking positioning mechanism are integrated, accurate control and quality improvement of the whole smooth blasting process are achieved, and the smooth blasting quality is improved. And smooth surface continuity and blasting consistency are remarkably improved, and the technical requirements of modern rock mass control excavation for high precision, low disturbance and high forming quality are met. The method is suitable for scenes with high requirements on rock mass disturbance control and forming precision, such as tunnel construction, mine roadway tunneling, side slope forming, ore body boundary control and the like, and has wide engineering applicability and popularization value.

The utility model relates to the technical field of engineering blasting, and discloses a charging device for a directional shaped charge blasting tube, which comprises a workbench and a plate chain conveyor mounted on the workbench and used for conveying the blasting tube, the motor speed reducer is mounted on one side of the workbench, and an output shaft of the motor speed reducer is connected with an output rod of the plate chain conveyor; the charging machine is arranged above the workbench and is used for conveying explosives to the blasting tube; the explosive conveying pipe is fixedly arranged on the blasting pipe and is used for discharging explosives into the blasting pipe; and the limiting mechanism is arranged on the workbench and is used for limiting the blasting tube on the plate chain conveyor. According to the explosive charging device for the directional shaped charge blasting pipe, by means of an automatic explosive charging mode, on-site explosive charging personnel are reduced, labor intensity is lowered, explosive charging yield is improved, and sustainability of production is effectively guaranteed.

The utility model provides a novel shaped charge blasting device for cutting specification stones, which comprises a radial shaped charge connector and an axial shaped charge device, and the vertical section of the radial shaped charge connector is gt; an annular structure; the axial energy gathering devices are connected to the two ends of the radial energy gathering connector, a plurality of V-shaped energy gathering grooves are formed in the inner walls of the axial energy gathering devices, and openings of the V-shaped energy gathering grooves face the axes of the axial energy gathering devices. The radial energy-gathering connector not only connects the plurality of axial energy-gathering devices together, but also is an energy-gathering groove for gathering the axial blasting energy; the axial energy gathering device is provided with a certain number of V-shaped energy gathering grooves, energy originally diffused all around is gathered in the axis direction of the V-shaped energy gathering grooves during blasting, and high-pressure, high-speed and high-density gas jet flow is formed. By means of the novel shaped charge blasting device for cutting the specification stone, the problems that after mixed emulsion explosives are used for blasting during cutting of the specification stone, the crushing circle is too large, the fine ore rate is too high, and the blasting lumpiness is difficult to control are effectively solved.

The invention discloses a device for dismantling a buried underwater unexploded ordnance, the device works based on an underwater robot, the device is composed of a shell, a connecting port, a sensor, a driving rod, a protection releasing element, a small motor, a telescopic rod, a shaped charge, a magnetic detection device, a telescopic sleeve and a supporting plate, and the shape of the buried unexploded ordnance is detected through the magnetic detection device; an explosive ordnance disposal scheme is determined after information is transmitted to the water operation platform, the telescopic rod controls the telescopic sleeve to ensure the position relation between the shaped charge and the unexploded ammunition, and the shaped charge is provided with an intelligent fuze which can be detonated after the robot is away from the unexploded ammunition. The device for destroying and burying the underwater unexploded ordnance has the advantage that the position relation between the shaped charge and the unexploded ordnance is fixed through the telescopic sleeve, the shaped charge can be accurately detonated, the unexploded ordnance can be detonated, the effect of accurately destroying and burying the underwater unexploded ordnance is achieved, meanwhile, the device can be produced in batches, and high economic benefits are achieved.

The utility model relates to an energy-gathered perforating bullet and carbon dioxide fracturing assisted TBM (tunnel boring machine) tunnel excavation device. The energy-gathered perforating bullet and carbon dioxide fracturing assisted TBM tunnel excavation device comprises a rock breaking system, a propelling and supporting system, a deslagging system and a supporting system, the rock breaking system comprises a rock breaking TBM cutterhead, a shaped charge blasting assembly, a carbon dioxide fracturing assembly and a rotary driving part, the rock breaking system comprises a shaped charge blasting assembly and a carbon dioxide fracturing assembly, carbon dioxide phase change fracturing is carried out on the basis of a jet flow channel, that is, a carbon dioxide fracturing pipe is installed in the jet flow channel generated by jet flow penetration, and the carbon dioxide fracturing pipe is installed in the jet flow channel; the carbon dioxide fracturing pipe is excited, stress waves generated after phase change of carbon dioxide and high-pressure gas act on surrounding rock mass, a small-range smashing area is generated around the jet flow channel, and therefore large-range radial cracks are generated with the fracturing pipe as the center.

The invention discloses an energy-gathered cutting device for directional forcible entry of a collapsed building, and belongs to the technical field of building forcible entry, the energy-gathered cutting device for directional forcible entry of the collapsed building comprises a double-layer shaped charge liner, and the double-layer shaped charge liner is formed by nesting an outer-layer shaped charge liner made of steel and an inner-layer shaped charge liner made of red copper; the outer-layer shaped charge liner is in an inverted frustum shape, and the inner-layer shaped charge liner is in an inverted frustum shape and comprises a high-detonation-velocity charge section, a thermite particle section and a low-detonation-velocity charge section which are sequentially connected in series; the detonating cord is connected with a high-detonation-velocity charge section, a thermite particle section and a low-detonation-velocity charge section in series, the delay detonator is arranged at the front end of the high-detonation-velocity charge section, and an outer-layer steel shaped charge crushes a concrete matrix through high impact toughness of steel to form an initial radial crack; the inner-layer red copper shaped charge liner generates high-speed energy-gathered jet flow by virtue of ductility of copper, the steel bars are efficiently cut off, and the inner-layer red copper shaped charge liner and the steel bars work cooperatively to improve the breaking efficiency and quality.