An arc linear shaped charge structure based on thin sector forming

Abstract

The application provides an arc linear shaped charge structure based on thin sector forming, which comprises a liner, a stainless steel shell, an explosive and a detonator, the arc linear shaped charge structure is formed by rotating a sector structure of a cross section of the liner and the stainless steel shell by a certain angle around an axis parallel to the upper edge of the cross section, the liner is arranged at the lower end of the stainless steel shell, the liner and the stainless steel shell form a closed container, the explosive and the detonator are arranged in the closed container formed by the liner and the stainless steel shell, and the liner is a conical liner or a semicircular liner. The application mainly utilizes the arc linear shaped charge structure matched with the conical or semicircular liner, so as to form a thin sector-shaped penetrator with higher head speed and more concentrated energy.

Description

Technical Field

[0001] This invention relates to the field of linear shaped charge technology, and more particularly to an arc-shaped linear shaped charge structure based on thin fan-shaped molding. Background Technology

[0002] In existing technologies, linear shaped charge structures generally include a detonation device, a shaped charge liner, explosive, and an outer shell as the main structures, supplemented by some fixed structures such as supports and fixed platforms. By forming a linear jet, the structure is cut along metal, concrete, and other materials. Many scholars have conducted extensive research on shaped charge liner materials, explosive materials, detonation methods, shaped charge liner shapes, and dimensional parameters. The main purpose is to improve energy utilization efficiency, save costs, reduce the difficulty of industrial applications, and increase the application rate.

[0003] However, the existing linear shaped charge structures are constructed by uniformly stretching the charge section longitudinally along a direction perpendicular to the section. This results in a uniformly shaped penetrator with a uniform load distribution in the longitudinal direction, leading to a relatively consistent penetration capability. Consequently, the upper limit of the overall penetration capability is also relatively low. When penetrating structures with large thickness or high hardness, it is easy to encounter the problem that the entire structure cannot be cut while local areas cannot be damaged. In addition, the longitudinal dimension of the existing linear shaped charge structure is much larger than the transverse dimension. It not only requires a large fixing device for assistance but also a relatively flat working environment. In working conditions with small working areas and complex terrain, the existing linear shaped charge method is not suitable.

[0004] Therefore, it is necessary to design an arc-shaped linear shaped charge structure based on thin fan-shaped molding. Summary of the Invention

[0005] To address the aforementioned technical problems of existing linear shaped charge structures having weak penetration capabilities and being unable to operate in confined and complex conditions, this invention provides an arc-shaped linear shaped charge structure based on a thin fan-shaped molding. This invention primarily utilizes an arc-shaped linear shaped charge structure in conjunction with a conical or semi-circular shaped charge liner to achieve the effect of forming a thin fan-shaped penetrator with higher head velocity and more concentrated energy.

[0006] The technical means employed in this invention are as follows:

[0007] An arc-shaped linear shaped charge structure based on thin fan-shaped molding is characterized in that the arc-shaped linear shaped charge structure includes: a shaped charge liner, a stainless steel shell, explosive and detonator. The arc-shaped linear shaped charge structure is a fan-shaped structure formed by rotating the cross sections of the shaped charge liner and the stainless steel shell around an axis parallel to the upper edge of the cross sections by a certain angle. The shaped charge liner is disposed at the lower end of the stainless steel shell. The shaped charge liner and the stainless steel shell form a closed container. The explosive and the detonator are disposed in the closed container formed by the shaped charge liner and the stainless steel shell. The shaped charge liner is a conical shaped charge liner or a semi-circular shaped charge liner.

[0008] Furthermore, the distance from the upper edge of the cross-section formed by the shaped charge and the stainless steel shell to the rotation axis is H, the rotation angle is γ, the side length of the cross-section is L, and the upper edge length of the cross-section is D.

[0009] Furthermore, the cross-section of the conical shaped charge shroud is an inverted cone, and the cone angle α of the conical shaped charge shroud is ≥45°; the thickness of the conical shaped charge shroud increases linearly from the bottom to the central axis, the thickness of the apex of the conical shaped charge shroud is a, and the thickness of the bottom end of the conical shaped charge shroud is b, where a is 0.05-0.08L and b is 0.1-0.12D.

[0010] Furthermore, the cross-section of the semi-circular shaped charge shroud is an inverted semicircle, and the thickness of the semi-circular shaped charge shroud is c, where c is 0.03-0.03L.

[0011] Furthermore, the thickness of the two sides of the stainless steel shell is t1, where t1 is 0.02-0.03L, and the thickness of the upper end cover of the stainless steel shell is t2, where t2 is 0.04-0.05D.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. This invention provides an arc-shaped linear shaped charge structure based on thin fan-shaped molding. This arc-shaped linear shaped charge structure can form a thin fan-shaped penetrator with highly concentrated local energy. The charge structure is formed by rotating the charge cross-section around an axis parallel to the upper edge of the cross-section at a certain angle. The charge structure has grooves inside and an arc shape outside, which not only subject the shaped charge to lateral compression on the cross-section but also to squeezing from both sides of the charge structure towards the center. This effectively increases the head velocity of the structure near the central axis, thereby forming a highly concentrated local energy linear load and greatly improving the penetration capability of the linear shaped charge structure against the target.

[0014] 2. This invention provides an arc-shaped linear shaped charge structure based on thin fan-shaped molding, which has a wider range of applications. The structure's dimensions can be scaled up or down according to operating conditions, and the shape of the shaped charge liner can be changed according to different penetration objectives. This structure can be deployed using a UUV or used in a fixed position. During deployment, it can serve as the head structure of a warhead to achieve localized, concentrated linear damage to the target. When used in a fixed position, the H, D, and L parameters of the arc-shaped linear shaped charge structure can be adjusted according to the target material, thickness, orientation, and other parameters to meet penetration requirements.

[0015] Based on the above reasons, this invention can be widely promoted in fields such as linear shaped charge technology. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional schematic diagram of an arc-shaped linear shaped charge structure with a conical shaped charge liner, based on a thin fan-shaped arc-shaped linear shaped charge structure according to the present invention.

[0018] Figure 2 This is a perspective view of an arc-shaped linear shaped charge structure with a conical shaped charge liner, based on a thin fan-shaped arc-shaped linear shaped charge structure according to the present invention.

[0019] Figure 3 This is a schematic cross-sectional view of an arc-shaped linear shaped charge structure with a semi-circular shaped charge liner, based on a thin fan-shaped arc-shaped linear shaped charge structure according to the present invention.

[0020] Figure 4 This is a perspective view of an arc-shaped linear shaped charge structure with a semi-circular shaped charge liner, based on a thin fan-shaped arc-shaped linear shaped charge structure according to the present invention.

[0021] Figure 5 This is a diagram of an arc-shaped linear shaped charge structure with a conical shaped charge liner when H=0.05L, based on a thin fan-shaped arc-shaped linear shaped charge structure according to the present invention.

[0022] Figure 6 This is a diagram of an arc-shaped linear shaped charge structure with a conical shaped charge liner when H=0.25L, based on a thin fan-shaped arc-shaped linear shaped charge structure according to the present invention.

[0023] Figure 7 This is a diagram of an arc-shaped linear shaped charge structure with a conical shaped charge liner when H=0.50L, based on a thin fan-shaped arc-shaped linear shaped charge structure according to the present invention.

[0024] Figure 8 This is a diagram of an arc-shaped linear shaped charge structure with a conical shaped charge liner when H=1.00L, based on a thin fan-shaped arc-shaped linear shaped charge structure according to the present invention.

[0025] Figure 9 This is a schematic diagram illustrating the forming and penetration effect of an arc-shaped linear shaped charge structure with a conical shaped charge liner when H is 1.00L, based on a thin fan-shaped arc-shaped linear shaped charge structure according to the present invention.

[0026] In the diagram: 1. Molding liner; 2. Stainless steel casing; 3. Explosive; 4. Detonator; 5. Rotating shaft. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0031] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0032] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0033] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0034] like Figure 1-9As shown, this invention provides an arc-shaped linear shaped charge structure based on a thin fan-shaped molding. The arc-shaped linear shaped charge structure includes: a shaped charge liner 1, a stainless steel shell 2, explosive 3, and a detonator 4. The arc-shaped linear shaped charge structure is a fan-shaped structure formed by rotating the cross-sections of the shaped charge liner 1 and the stainless steel shell 2 around an axis parallel to the upper edge of the cross-sections at a certain angle. The shaped charge liner 1 is located at the lower end of the stainless steel shell 2. The shaped charge liner 1 and the stainless steel shell 2 form a closed container. The explosive 3 and the detonator 4 are located within the closed container formed by the shaped charge liner 1 and the stainless steel shell 2. The shaped charge liner 1 is a conical shaped charge liner or a semi-circular shaped charge liner. The distance from the upper edge of the cross-section formed by the shaped charge liner 1 and the stainless steel shell 2 to the rotation axis 5 is... The distance is H, the rotation angle is γ, the side length of the cross section is L, and the upper edge length of the cross section is D; the cross section of the conical shaped charge liner is an inverted cone, and the cone angle α of the conical shaped charge liner is ≥45°; the thickness of the conical shaped charge liner increases linearly from the bottom to the central axis, the thickness of the apex of the conical shaped charge liner is a, and the thickness of the bottom end of the conical shaped charge liner is b, where a is 0.05-0.08L and b is 0.1-0.12D; the cross section of the semi-circular shaped charge liner is an inverted semicircle, and the thickness of the semi-circular shaped charge liner is c, where c is 0.03-0.03L; the thickness of both sides of the stainless steel shell 2 is t1, where t1 is 0.02-0.03L, and the thickness of the upper end cover of the stainless steel shell 2 is t2, where t2 is 0.04-0.05D.

[0035] The shaped charge liner 1 is made of a copper alloy material with higher strength and better ductility.

[0036] The explosive 3 is a B explosive with good detonation performance and thermal stability (the type of explosive can be changed according to the actual use). The detonation velocity is 7980m / s. The cross-section of the explosive structure is provided with a groove, which fits tightly with the shaped charge liner 1. Considering the corrosion situation under underwater conditions, the shell material is made of stainless steel and is integrally formed. Moreover, the shell has little impact on the formation of the penetrator and the head velocity.

[0037] The detonator 4 is an arc-shaped linear instantaneous detonator attached to the inside of the end cap to ensure that the detonation method is arc detonation, and the detonator is controlled by a remote sensing device.

[0038] Example 1

[0039] When the shaped charge liner 1 is a conical shaped charge liner, the loading structure is as follows: Figure 1-2 As shown.

[0040] Example 2

[0041] When the shaped charge shroud 1 is a semi-circular shaped charge shroud, the loading structure is as follows: Figure 3-4 As shown.

[0042] Example 3

[0043] When the distance H between the upper edge of the cross-section formed by the shaped charge shroud 1 and the stainless steel shell 2 and the rotation axis 5 is 0.05L, the structure is as follows: Figure 5 As shown.

[0044] Example 4

[0045] When the distance H between the upper edge of the cross-section formed by the shaped charge shroud 1 and the stainless steel shell 2 and the rotation axis 5 is 0.25L, the structure is as follows: Figure 6 As shown.

[0046] Example 5

[0047] When the distance H between the upper edge of the cross-section formed by the shaped charge shroud 1 and the stainless steel shell 2 and the rotation axis 5 is 0.5L, the structure is as follows: Figure 7 As shown.

[0048] Example 6

[0049] When the distance H between the upper edge of the cross-section formed by the shaped charge shroud 1 and the stainless steel shell 2 and the rotation axis 5 is 1.0L, the structure is as follows: Figure 8 As shown.

[0050] Example 7

[0051] When the distance H between the upper edge of the cross-section formed by the shaped charge liner 1 and the stainless steel shell 2 and the rotation axis 5 is 1.0L, and the rotation angle γ is 27.66°, the formation result and penetration effect of the arc-shaped linear shaped charge structure with a conical shaped charge liner in air explosion are as follows: Figure 9 As shown, under this condition, the head velocity of the arc-shaped penetrator is 15% higher than that of the traditional linear penetrator with the same charge and cross-sectional parameters, resulting in better penetration.

[0052] This structure can be deployed using a UUV or used in a fixed location. Its auxiliary fixed structure can be adjusted according to the deployment location and target. When deployed, this structure can act as the warhead to linearly destroy the target with locally concentrated energy. When used in a fixed location, the H, D, L parameters of the arc-shaped linear shaped charge structure can be adjusted according to the target material, thickness, orientation, and other parameters to meet the penetration requirements. The optimal detonation height generally differs for different charge structures with different parameters. The optimal working position of the arc-shaped linear shaped charge structure can be calculated and analyzed through experiments or numerical simulations, or determined based on the operating conditions.

[0053] After determining the working position of the arc-shaped linear shaped charge structure, the remote sensing device inside the charge structure is detonated. At the same time, the remote sensing device detonates the entire detonator structure, forming an arc-shaped detonation. The arc-shaped detonation can make the penetrator form uniformly, continuously, and symmetrically. The shock wave can be superimposed at the central axis, forming a stronger penetration load. Then, under the action of the detonation products, the shaped charge liner is compressed, flipped, and converged at the axis, forming a thin fan-shaped penetrator. Since the thickness of the shaped charge liner increases linearly from the bottom to the top corner, it can solve the problem of the fracture of the cone corner part of the traditional linear shaped charge under high energy, so that the arc-shaped penetrator has a better forming effect. Since the charge structure has grooves inside and arc-shaped outside, the shaped charge liner can not only be subjected to lateral compression in the cross section, but also to squeezing from both sides of the charge structure towards the middle, thereby effectively increasing the head velocity of the structure near the central axis, thus forming a local energy highly concentrated linear load, which greatly improves the penetration capability of the linear shaped charge structure against the target.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An arc-shaped linear shaped charge structure based on thin fan-shaped molding, characterized in that, The arc-shaped linear shaped charge structure includes: a shaped charge liner, a stainless steel shell, explosives, and a detonator. The arc-shaped linear shaped charge structure is a fan-shaped structure formed by rotating the cross-sections of the shaped charge liner and the stainless steel shell around an axis parallel to the upper edge of the cross-sections at a certain angle. The shaped charge liner is located at the lower end of the stainless steel shell. The shaped charge liner and the stainless steel shell form a closed container. The explosives and the detonator are located in the closed container formed by the shaped charge liner and the stainless steel shell. The shaped charge liner is a conical shaped charge liner or a semi-circular shaped charge liner.

2. The arc-shaped linear shaped charge structure based on thin fan-shaped molding according to claim 1, characterized in that, The distance from the upper edge of the cross section formed by the shaped charge and the stainless steel shell to the rotation axis is H, the rotation angle is γ, the side length of the cross section is L, and the upper edge length of the cross section is D.

3. The arc-shaped linear shaped charge structure based on thin fan-shaped molding according to claim 2, characterized in that, The conical shaped charge shroud has an inverted cone cross-section, and the cone angle α of the conical shaped charge shroud is ≥45°; the thickness of the conical shaped charge shroud increases linearly from the bottom to the central axis, the thickness of the apex of the conical shaped charge shroud is a, and the thickness of the bottom end of the conical shaped charge shroud is b, where a is 0.05-0.08L and b is 0.1-0.12D.

4. The arc-shaped linear shaped charge structure based on thin fan-shaped molding according to claim 2, characterized in that, The cross-section of the semi-circular shaped charge shroud is an inverted semicircle, and the thickness of the semi-circular shaped charge shroud is c, where c is 0.03-0.03L.

5. The arc-shaped linear shaped charge structure based on thin fan-shaped molding according to claim 2, characterized in that, The thickness of the two sides of the stainless steel shell is t1, where t1 is 0.02-0.03L, and the thickness of the upper end cover of the stainless steel shell is t2, where t2 is 0.04-0.05D.

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