Portable long-distance damage device

Abstract

The utility model provides a long-distance damage device which comprises an initiating explosive column, a mounting cover, a main charge, a shaped charge cover and a mounting sleeve, according to the portable long-distance damage device, the main charge is a black polymer explosive, the main charge adopts a forming charge mode, and the main charge is firstly pressed and then assembled in the mounting sleeve; according to the portable long-distance damage device, the shaped charge cover is made of red copper, and before the main charge is assembled, the shaped charge cover is placed in the mounting sleeve. The portable long-distance damage device has the advantages of damage in multiple aspects, on one hand, the device is not sensitive to the burst height, the defect that the armor breaking effect is obvious when the burst height of a common armor breaking bomb is only 2-5 times of the diameter of the bomb is overcome, and the device can form efficient damage under the condition that the diameter of the bomb is 100-125 times of the diameter of the bomb; and 2, the penetration aftereffect is large, and only a small amount of metal jet flows enter the armored target after common armor-breaking ejection flows penetrate the deck, so that the damage effect is limited.

Description

TECHNICAL FIELD

[0001] The utility model relates to ammunition damage technical field, concretely is a portable long-range damage device. BACKGROUND

[0002] The core technology of long-range damage device is mainly based on shaped charge EFP explosively formed projectile, the shaped charge is designed according to the principle of shaped charge penetration effect, and is used to penetrate various armored targets, the working mechanism of EFP explosively formed projectile is that when the microelement of the liner converges on the convergence point on the axis, a spherical projectile with high temperature and high speed is formed, the metal jet penetrates the target plate from the head microelement, and when the jet microelement hits the target plate, the speed remains the same with the penetration surface, in the penetration process, the kinetic energy of the penetration interface is mainly provided by the EFP explosively formed projectile, and the speed is relatively low, the energy of the previous microelement is continuously reduced, and the previous microelement is caught up by the following microelement before the energy of the previous microelement is exhausted, when the following microelement penetrates the contact penetration interface, the previous jet microelement stops penetration, and the remaining energy is used to melt the penetration interface at high temperature and expand the hole, the following jet microelement follows closely, enters the hole, and continues to penetrate the interface, until the jet microelement with critical speed reaches the interface, and then the penetration is terminated.

[0003] At present, the penetration effect of ordinary armor-piercing bomb is obvious only when the burst height is 2-5 times the caliber, and the device is extremely sensitive to the burst height, the long-range damage device not sensitive to the burst height is designed through the improvement of the liner, and the long-range damage device can be applied to the damage of bridges, roads, armored vehicles and enemy troops, and can also be applied to unmanned aerial vehicle ammunition to penetrate and damage the carrier such as ship.

[0004] In view of the above problems, it is urgent to make innovative design on the basis of the structure of the original portable long-range damage device. UTILITY MODEL CONTENTS

[0005] The utility model discloses in view of the prior art's insufficient: on the basis of the previous research of damage device, propose a kind of portable long-range damage device, solve the defect that previous shaped charge cannot realize long-range attack.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of portable long-range damage device, including detonating column, installation cover, main charge, liner, installation sleeve, the detonating column is the cylindrical body assembled on installation cover, the main charge is assembled in installation sleeve, the liner is assembled in shell installation sleeve, the lower portion of installation cover has the internal thread of processing, the upper end of installation sleeve has the external thread of processing, installation cover and installation sleeve are connected by screw thread, reach the effect of integrated assembly.

[0007] The preferred primary explosive column is a pressed primary explosive column.

[0008] The preferred main charge is a pressed shaped charge of a polyblack explosive.

[0009] The preferred liner material is red copper, which is placed on the mounting sleeve before the main charge is assembled.

[0010] The preferred portable long-range damage device has an inner thread on the lower part of the mounting cover and an outer thread on the upper end of the mounting sleeve, and the mounting cover and the mounting sleeve are connected by the threads to achieve an integrated assembly effect.

[0011] The preferred portable long-range damage device can use a multi-element initiation method, and can use a detonator to initiate the primary explosive column or a detonator inserted into the hole of the primary explosive column.

[0012] Compared with the prior art, the portable long-range damage device has the following advantages:

[0013] First, it is not sensitive to the burst height, which improves the defect that the burst height of the ordinary armor-piercing projectile is only 2-5 times the projectile diameter, and the device can achieve high-efficiency damage at 100-125 times the projectile diameter. Second, the penetration effect is large, and the jet of the ordinary armor-piercing projectile only has a small amount of metal jet entering the armored target after penetrating the armor plate, so the damage effect is limited. The device realizes long-range damage, and most of the projectile enters the armored target, and at the same time, it causes a large amount of collapse on the back of the armor, generating more effective damage fragments, which can cause secondary damage to the personnel inside the armored vehicle, have the ability to detonate other ammunition, have the ability to ignite fuel, and have a burn, suffocation effect on enemy troops and a transverse damage effect on the target that far exceeds the ordinary armor-piercing projectile. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 The figure is a schematic diagram of the overall structure of the device.

[0015] Fig. 2 The figure is a numerical simulation damage result diagram of the device.

[0016] Fig. 3 The figure is a schematic diagram of the horizontal long-range steel target of the device.

[0017] In the figure: 1, the initiation column; 2, the installation cover; 3, the main charge; 4, the shaped charge liner; 5, the installation sleeve. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] Please refer to Figs. 1-3 The present application provides a technical solution: a portable long-distance damage device, comprising: an initiation column 1, an installation cover 2, a main charge 3, a shaped charge liner 4, and an installation sleeve 5. The initiation column 1 is a cylindrical body assembled on the installation cover 2. The main charge 3 is assembled in the installation sleeve 5. The shaped charge liner 4 is assembled in the shell installation sleeve 5.

[0020] The initiation column 1 is a booster column pressed by a polyblack explosive. The initiation column 1 is a cylindrical body in the front view. The main charge 3 is a polyblack explosive. The main charge 3 is in the form of a shaped charge, which is first pressed and then assembled in the installation sleeve 5. Before assembling the main charge 3, the shaped charge liner 4 is placed in the installation sleeve 5. The lower part of the installation cover 2 is internally threaded. The upper end of the installation sleeve 5 is externally threaded. The installation cover 2 and the installation sleeve 5 are connected by threads to achieve the effect of integrated assembly.

[0021] An explosively formed projectile (EFP) is a kind of shaped charge. When the cone angle of the shaped charge liner 4 is greater than 90°, the shaped charge liner 4 cannot form a normal jet under the action of the detonation load, but is extruded to form a dense high-speed penetrating body, which then penetrates the target plate. The shaped charge liner 4 collapses and deforms under the pressure of the detonation products, and the collapse speed is related to the effective charge amount. The amount of charge contacted by the top microelement of the shaped charge liner 4 is more, while the effective amount of charge corresponding to the mouth microelement is less. Therefore, the collapse speed gradually decreases from the top of the liner to the mouth of the liner, and there is a speed difference between the microelements at different positions of the shaped charge liner 4. Due to the existence of the collapse speed gradient, any microelement of the shaped charge liner 4 will rotate around the transmission direction of the detonation wave.

[0022] According to the armor-piercing theory and the law of conservation of kinetic energy, the detonation wave and each microelement act stably, and the speed equation of a microelement on the shaped charge liner 4 is as follows:

[0023] Assuming that the initial parameters are constant, the pressure of the detonation gas acting on the microelement is only a function of the incident angle ω and time t, p=p(ω, t). In the spherical coordinate system, the outer surface area of the microelement can be represented as:

[0024]

[0025] wherein: r2 is the outer curvature radius of the micro-element, and n is the unit normal vector of the micro-element;

[0026] The total impulse of the detonation gas acting on the micro-element of the liner is I, and the micro-element of the liner is accelerated to a final velocity v. According to the law of conservation of momentum, we have

[0027] I = ∫ pdAdt = vdm (2)

[0028] wherein: dm is the mass of the micro-element of the liner, dm = phdA n, and for the equal wall thickness h = σ is constant, and for the variable wall thickness h = h (θ, δ, r1, r2);

[0029] Since the liner 4 has axial symmetry, it can be simplified as a two-dimensional problem, and the basic vector is written in component form as:

[0030] I = I x i + I rj (3)

[0031] v = v xi +v r j (4)

[0032] n = icosθ + jsinθ (5)

[0033] wherein: x, r respectively represent the axial and radial components; i, j are respectively the unit vectors in the x, r directions, and the respective velocity components are:

[0034] v x = I cosθ / ρhdA (6)

[0035] v r = I sinθ / ρhdA (7)

[0036] The incident angle ω of the detonation wave acting on the surface of the liner increases during the process of the detonation wave propagating from the top of the liner to the mouth, which leads to the decrease of the crushing effect on the micro-element of the liner. In addition, the rarefaction wave formed by the free flying of the explosion products of the main charge 3 gradually strengthens the rarefaction effect on the detonation flow field, which leads to the decrease of the impulse acting on the corresponding micro-element. The self-forging deformation process of the liner 4 and the final shaped shape of the EFP are determined by the gradient of the velocity component distribution of the micro-element. The radial velocity gradient makes the liner 4 collapse, close, and the axial velocity gradient makes the liner 4 overturn and stretch. The self-forging deformation process of the liner 4 ends when the radial and axial velocity gradients of each micro-element are zero;

[0037] The shell of the long-distance damage device not only provides protection for the main charge 3 and the liner 4, but also restrains the detonation process of the explosive. The existence of the thickness and mass of the shell can prolong the action time of the detonation wave on the liner 4, so that the liner 4 obtains more kinetic energy. Generally, for a rigid charge structure, the thickness of the shell is 0.04 to 0.05 times the diameter of the liner, the length-diameter ratio of the charge is generally 0.6-1.0, the ratio of the curvature radius of the red copper liner to the diameter is generally 0.9-1.0, and the wall thickness of the liner 4 is generally selected in the range of 0.03 to 0.06 times the diameter of the mouth of the liner 4;

[0038] In order to obtain a reverse type deep penetration EFP, a variable wall thickness spherical segment liner is selected in the design. The purpose is to gradually thicken the wall thickness of the liner 4 from the top of the liner to the mouth of the liner, increase the velocity difference of the jet head and tail, and make the EFP explosion forming projectile appear sufficient uniformity elongation in the same motion space compared with the previous design, form a "half spindle" type jet, and improve the armor penetration depth. The basic wall thickness is selected to be 0.04 times the diameter of the mouth of the liner, so the wall thickness of the liner 4 with a diameter of 100 mm is 4 mm. The inner arc curvature of the spherical segment liner 4 is 0.9, so the outer arc curvature radius of the liner 4 with a diameter of 100 mm is 90 mm. The outer arc is a variable wall thickness design, and the value is derived from the wall thickness change rate. In this design, the wall thickness change rate is 0.8.

[0039] The above is only the best specific implementation method of the present application, but the present application belongs to a series of design products. Any skilled person in the technical field can easily change the shape, replace the liner 4, or apply the variable wall thickness spherical segment type liner 4 to other designs to obtain a new application, which should be covered within the protection scope of the present application.

[0040] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A portable long-range damage device, comprising a detonating column (1), a mounting cover (2), a main charge (3), a shaped charge (4), and a mounting sleeve (5), characterized in that: The initiating explosive column (1) is a cylinder assembled on the mounting cover (2), the main charge (3) is assembled in the mounting sleeve (5), and the cup (4) is assembled in the shell mounting sleeve (5).

2. A portable long-range damage device according to claim 1, characterized in that: The initiating explosive column (1) is a pressed booster column of polyblack explosive.

3. A portable long-range damage device according to claim 1, characterized in that: The initiating explosive column (1) is a cylinder in the front view.

4. A portable long-range damage device according to claim 1, wherein: The main charge (3) is polyblack explosive.

5. A portable long-range damage device according to claim 1, wherein: The main charge (3) is in the form of shaped charge, which is first pressed and then assembled in the mounting sleeve (5).

6. A portable long-range damage device according to claim 1, wherein: The cup (4) is placed in the mounting sleeve (5) before assembling the main charge (3).

7. A portable long-range damage device according to claim 1, wherein: The lower part of the mounting cover (2) is internally threaded, and the upper end of the mounting sleeve (5) is externally threaded.

8. A portable long-range damage device according to claim 7, characterized in that: The mounting cover (2) and the mounting sleeve (5) are connected by threads, achieving the effect of integrated assembly.

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