A multi-mode adjustable linear water jet device for improvised explosive device disposal

Abstract

The present application belongs to the technical field of simple explosive elimination, and particularly relates to a multi-mode adjustable linear water jet device for simple explosive elimination, which comprises an initiating mechanism, an energy-gathering charge shell, an explosive, a conical water-filled charge case, a plastic diaphragm, a straight conical water-filled charge case and a compression screw; the energy-gathering charge shell is wrapped around the outer surface of the initiating mechanism and the explosive, and the charge case is tightly matched with the lower end of the explosive through the compression screw; due to the existence of the plastic diaphragm, the structure of the charge case is adjustable, and the charge case can be adjusted to be a conical charge case or a straight conical charge case according to the water injection amount; in addition, the device can form a linear water jet with a speed comparable to that of a general metal jet, has a significant penetration effect on simple explosives made of flammable gas or explosive materials, and has the advantages of cleanliness, low economic cost, safe and convenient operation compared with the metal jet explosive elimination method, and can replace the shaped metal jet bomb to eliminate simple explosives, especially in urban explosive elimination scenes.

Description

Technical Field

[0001] This invention belongs to the field of improvised explosive device (IED) disposal technology, specifically relating to a multi-mode adjustable linear water jet device for IED disposal. Background Technology

[0002] Improvised explosive devices (IEDs) are explosive devices that are simple to make, use readily available raw materials, have a simple manufacturing process, and do not require highly specialized skills. These IEDs are used in various malicious acts, including terrorism, criminal activity, or other forms of sabotage. The raw materials for IEDs can include explosive substances (such as black powder or simple explosives), modified commercial explosives, or flammable gases and compressed gases. In urban environments, terrorists frequently use IEDs as one of their primary means of terrorist attacks. If terrorists use IEDs to attack public places, government buildings, transportation facilities, and other densely populated areas, it could potentially cause large-scale casualties and social panic.

[0003] Improvised explosive devices (IEDs), if not effectively disposed of, pose a significant threat to public safety and disrupt the normal operation of cities. IEDs also fall under the category of unexploded ordnance. Among the various methods of explosive disposal, the most commonly used method currently is to detonate unexploded ordnance using shaped charge detonators. Conventional shaped charge devices generate a metal jet characterized by high pressure, high speed, and high temperature, capable of impacting and detonating ordinary unexploded ordnance.

[0004] A shaped charge device generally consists of a detonation mechanism, a main explosive charge, a metal casing, a pressure screw, and a metal shaped charge liner. The process of forming and discharging the shaped charge metal jet is as follows: the detonation mechanism ignites the main explosive charge. The explosion instantly generates a high-pressure shock wave and detonation products in an arc shape, which rapidly propagate to the metal shaped charge liner. Under the immense detonation pressure, the liner is gradually compressed and deformed. The micro-elements on the liner wall converge axially towards the device and collide at a large angle, forming a linear metal jet. Finally, the high-pressure, high-speed metal jet penetrates the explosive and detonates it. However, the process of discharging explosives using shaped charge metal jets carries certain safety risks, and the materials required for designing shaped charge metal jet devices are expensive, causing significant environmental pollution, making them unsuitable for use in urban environments. Summary of the Invention

[0005] To address the problems in the prior art, this invention provides a multi-mode adjustable linear water jet device for the disposal of simple explosives. The shaped charge liner structure can be adjusted to a cone-shaped or straight cone-shaped shaped charge liner according to the water injection volume, thereby enabling multiple output modes from a single device and forming a linear water jet with a speed comparable to that of a general metal jet. It also has the advantages of being cleaner, having lower economic costs, and being safer and more convenient to operate.

[0006] The technical problem solved by this invention is achieved by the following technical solution:

[0007] The purpose of this invention is to provide a multi-mode adjustable linear water jet device for the disposal of improvised explosive devices, including an initiation mechanism, a shaped charge housing, an explosive and a shaped charge liner, wherein the explosive is disposed between the shaped charge housing and the shaped charge liner, and the initiation mechanism is fitted to the top of the explosive.

[0008] The upper end of the main explosive charge is flat and fits tightly with the detonation mechanism. The shaped charge casing is wrapped around the detonation mechanism and the outer surface of the explosive. The detonation mechanism is composed of an electronic detonator, which is fixed to the top of the device axis by the shaped charge casing and the main explosive charge, and is used to detonate the explosive at a single point.

[0009] Furthermore, the shaped charge includes a conical water-filled shaped charge, a plastic diaphragm, and a straight conical water-filled shaped charge. The conical water-filled shaped charge is positioned at the top of the straight conical water-filled shaped charge, and a plastic diaphragm is provided between the conical water-filled shaped charge and the straight conical water-filled shaped charge.

[0010] This invention is a multi-mode adjustable linear water jet device for the disposal of improvised explosive devices (IEDs). The shaped charge liner is adjustable due to the presence of a plastic diaphragm, and can be either a cone-shaped or a straight cone-shaped shaped charge liner. The device adjusts the liner structure according to the water injection volume. When the water pressure in the straight cone-shaped shaped charge liner exceeds the plastic diaphragm rupture pressure threshold, the liner transforms into a cone-shaped shaped charge liner, thus enabling multiple output modes from a single device. Furthermore, this device can generate a linear water jet with a velocity comparable to that of a conventional metal jet, exhibiting significant penetration effectiveness against IEDs made of flammable gases or explosive materials. Compared to metal jet disposal methods, it offers advantages such as cleanliness, low cost, and safe and convenient operation.

[0011] Furthermore, the detonation mechanism, the shaped charge casing, the explosive, the cone-shaped water-filled liner, the plastic diaphragm, and the straight cone-shaped water-filled liner are all coaxial.

[0012] Furthermore, the upper end of the explosive is trapezoidally filled in the cavity of the shaped charge shell, the upper end of the explosive is in close contact with the detonation mechanism, and the lower part of the explosive is provided with a groove that fits tightly with the shaped charge liner.

[0013] Furthermore, the outer shell of the shaped charge is made of nylon material, and the internal cavity is filled with liquid water with a thickness of 2mm.

[0014] The cavity inside the shaped charge liner is divided into two independent spaces due to the presence of the plastic diaphragm. When the plastic diaphragm is present, liquid water can only be injected into the cavity below the diaphragm to form a straight cone-shaped shaped charge liner. When the water injection pressure exceeds the plastic diaphragm rupture pressure threshold, water is continued to be filled, and the shaped charge liner is adjusted to a cone-shaped shaped charge liner.

[0015] Furthermore, the explosive has a height of 73mm, a top surface length of 22mm, and a charge diameter of 54mm.

[0016] The primary explosive is preferably Octol explosive, with a density of 1.821 g / cm³. 3 The main charge is formed by pressing with a mold. The length-to-diameter ratio of the charge should be maintained at 1.35. The shock wave generated by the explosion and the detonation products act on the shaped charge liner to form a linear water jet.

[0017] Furthermore, the shaped charge casing is made of aluminum, such as AL2024-T4, with a thickness of 2mm, used to tightly enclose the detonation mechanism, explosive, and pressure screw.

[0018] Furthermore, the device also includes a pressure screw, which is preferably made of 2A12 alloy. The shaped charge liner is tightly fitted to the lower end of the explosive through the pressure screw, which is used to fix the shaped charge liner and the grooved surface at the lower end of the explosive to fit tightly together.

[0019] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0020] 1. The device of the present invention can adjust the structure of the shaped charge hood according to the water injection volume. When the water injection pressure in the straight conical shaped charge hood exceeds the plastic diaphragm breakage pressure threshold, the charge hood becomes a cone-shaped charge hood, thereby realizing multiple modes of output from a single device.

[0021] 2. The device of the present invention can form a linear water jet with a velocity comparable to that of a conventional metal jet. The focused water jet formed by the device of the present invention has a significant penetration effect on improvised explosive devices made of flammable gases or explosive materials.

[0022] 3. Compared with the metal jet bomb disposal method, the device of the present invention has the advantages of being cleaner, more economical, and safer to operate. Especially in urban bomb disposal scenarios, it can replace shaped charge metal jet bombs for simple explosive disposal.

[0023] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above contents, objectives, features and advantages of the present invention more obvious and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a multi-mode adjustable linear water jet device for the disposal of simple explosives according to the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of the shaped charge shell in the device of the present invention.

[0026] Figure 3This is a schematic diagram of the main explosive charge in the device of the present invention.

[0027] Figure 4 This is a schematic diagram of the structure of the straight conical liquid-filled hood in the device of the present invention.

[0028] Figure 5 This is a schematic diagram of the structure of the medicine-shaped cover in the device of the present invention.

[0029] Figure 6 This is a schematic diagram illustrating the simulation effect of the linear focused water jet penetrating a steel target plate using the device of the present invention.

[0030] Figure 7 This is a schematic diagram illustrating the simulation effect of the linear focused water jet penetrating a steel target plate using the device of the present invention.

[0031] Figure 8 This is a schematic diagram illustrating the simulation effect of the linear focused water jet penetrating a steel target plate using the device of the present invention.

[0032] 1-Initiation mechanism, 2-Shaped charge casing, 3-Explosive, 4-Conical water-filled propellant liner, 5-Plastic diaphragm, 6-Straight conical water-filled propellant liner, 7-Pressure screw. Detailed Implementation

[0033] The technical solution of the present invention will be further described in detail below with reference to specific embodiments. It should be understood that the following embodiments are merely illustrative and explanatory of the present invention and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the above content of the present invention are covered within the scope of protection intended by the present invention.

[0034] In addition, unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be obtained by purchasing from the market or prepared by existing methods.

[0035] refer to Figure 1-8 A schematic diagram of the structure and experimental simulation effect of a multi-mode adjustable linear water jet device for the disposal of improvised explosive devices.

[0036] A multi-mode adjustable linear water jet device for improvised explosive device disposal, such as Figure 1 As shown, it includes an initiation mechanism 1, a shaped charge housing 2, an explosive 3, a shaped charge liner, and a pressure screw 7. The explosive 3 is filled and disposed between the shaped charge housing 2 and the shaped charge liner. The initiation mechanism 1 is located at the top of the explosive 3. The upper end of the main explosive 3 is flat and fits tightly with the initiation mechanism 1. The shaped charge housing 2 is wrapped around the outer surface of the initiation mechanism 1 and the explosive 3. The shaped charge liner is tightly fitted to the lower end of the explosive 3 through the pressure screw 7.

[0037] like Figure 2 and 3As shown, the shaped charge casing 2 is a stepped axial cylindrical tube with an initiation mechanism 1 at the upper end for detonating the explosive 3 and an opening at the lower end. The explosive 3 is trapezoidally filled in the cavity of the shaped charge casing 2, with its upper end fitting against the initiation mechanism 1 and its lower part having a groove that matches the shaped charge liner. The lower part fits tightly with the shaped charge liner.

[0038] like Figure 4 and 5 As shown, the shaped charge shroud includes a cone-shaped water-filled shaped charge shroud 4, a plastic diaphragm 5, and a straight cone-shaped water-filled shaped charge shroud 6. The cone-shaped water-filled shaped charge shroud 4 is located at the top of the straight cone-shaped water-filled shaped charge shroud 6. A plastic diaphragm 5 is provided between the cone-shaped water-filled shaped charge shroud 4 and the straight cone-shaped water-filled shaped charge shroud 6. Due to the presence of the plastic diaphragm 5, the structure of the shaped charge shroud is adjustable and can be divided into a cone-shaped shaped charge shroud and a straight cone-shaped shaped charge shroud. This invention can form a shaped charge structure for linear water jets used for the disposal of improvised explosive devices.

[0039] The outer shell of the shaped charge liner is made of nylon material, and the internal cavities separated by the plastic diaphragm 5 can be filled with liquid water. The shaped charge liner is tightly attached to the lower end of the explosive 3 by the pressure screw 7.

[0040] Preferably, the detonation mechanism 1, the shaped charge casing 2, the explosive 3, the cone-shaped water-filled liner 4, the plastic diaphragm 5, and the straight cone-shaped water-filled liner 6 are all coaxial.

[0041] Preferably, the detonation mechanism 1 is composed of an electronic detonator, which is located at the top of the device and is used to detonate the explosive 3 at a single point.

[0042] The shaped charge casing 2 is preferably made of AL2024-T4 metal material. The thickness of the shaped charge casing 2 is 2mm, which can be used to fix the detonation mechanism 1 and the explosive 3.

[0043] Preferably, the main explosive 3 is Octol explosive 3, with a height of 73mm, a top surface length of 22mm, and a charge diameter of 54mm. After being detonated by the detonation mechanism 1, the explosive 3 generates a shock wave and detonation products that act on the shaped charge liner.

[0044] The shaped charge shroud adopts a straight conical structure, with an outer shell made of nylon and an internal liquid water layer 2mm thick. This straight conical shaped charge shroud can improve the energy focusing effect of the device and increase the effective mass of the linear energy-focusing water jet.

[0045] like Figure 5 As shown, if the water injection pressure in the straight conical water-filled propellant hood 6 reaches the breaking pressure threshold of the plastic film, the propellant hood structure is adjusted to a conical water-filled propellant hood 4. Since the amount of propellant and the length-to-diameter ratio of the propellant remain unchanged, the power of the water jet decreases, thereby realizing different power outputs and different modes of output from a single device.

[0046] The detonation mechanism 1 of the present invention is fixed to the top of the device axis by the shaped charge shell 2 and the main explosive charge 3 to detonate the explosive charge 3. The main explosive charge 3 is formed by pressing with a mold. Its upper end is a trapezoidal charge and fits tightly with the detonation mechanism 1. The grooved surface of the lower end cooperates with the shaped charge liner through the pressure screw 7. The shaped charge shell 2 tightly wraps the detonation mechanism 1, the explosive charge 3 and the pressure screw 7. The internal cavity of the shaped charge liner is divided into two independent spaces due to the presence of the plastic diaphragm 5. When the plastic diaphragm 5 is present, liquid water can only be injected into the cavity below the diaphragm to form a straight cone-shaped shaped charge liner. When the water injection pressure exceeds the breaking pressure threshold of the plastic diaphragm 5, water is continued to be filled and the shaped charge liner is adjusted to a cone-shaped shaped charge liner.

[0047] Experimental Example

[0048] Computer simulation was performed to demonstrate the device of the present invention in an air-based explosion disposal environment.

[0049] The experiment used a simple explosive device with a wall thickness equivalent to a 10mm A3 steel target plate, and the internal charge was BH-1 explosive 3. The water jet removal device of this invention was used to remove the simple explosive device.

[0050] Figure 6 , 7 Figure 8 shows a simulation diagram of the penetration effect of the linear shaped charge water jet formed by the disposal device of the present invention into an improvised explosive device. After the detonation mechanism 1 detonates the explosive, the shaped charge device forms a high-speed, high-pressure linear shaped charge water jet. After the jet contacts the target plate, it transmits a huge shock wave, and a penetration hole appears in the axial direction of the target plate. After a certain penetration time, the water jet completely penetrates the steel target plate. According to the principle of impact detonation of a shelled explosive, if the linear shaped charge water jet formed by the shaped charge device can penetrate the equivalent target of the explosive, it can be considered that the explosive has been disposed of. Therefore, it can be concluded that the linear shaped charge water jet formed by this water jet device can dispose of improvised explosive devices.

[0051] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0052] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A multi-mode adjustable linear water jet device for improvised explosive device disposal, characterized in that, It includes an initiation mechanism (1), a shaped charge housing (2), an explosive (3) and a shaped charge liner. The explosive (3) is disposed between the shaped charge housing (2) and the shaped charge liner. The initiation mechanism (1) is attached to the top of the explosive (3). The upper end of the explosive (3) is attached to the detonation mechanism (1), and the lower part of the explosive (3) is provided with a groove that fits tightly with the explosive liner; The outer shell of the shaped charge is made of nylon material, and the inside is filled with liquid water; The shaped charge liner contains a plastic diaphragm (5). The cavity inside the shaped charge liner is divided into two independent spaces due to the presence of the plastic diaphragm (5). When the plastic diaphragm (5) is present, liquid water can only be injected into the cavity below the plastic diaphragm (5) to form a straight cone-shaped shaped charge liner. When the water injection pressure exceeds the breaking pressure threshold of the plastic diaphragm (5), water is continued to be filled, and the shaped charge liner is adjusted to a cone-shaped shaped charge liner.

2. The multi-mode adjustable linear water jet device for improvised explosive device disposal as described in claim 1, characterized in that: The detonation mechanism (1), the shaped charge casing (2), the explosive (3), the shaped charge cover, and the plastic diaphragm (5) are all coaxial.

3. The multi-mode adjustable linear water jet device for improvised explosive device disposal as described in claim 1, characterized in that: The upper end of the explosive (3) is trapezoidally filled in the cavity of the shaped charge shell (2).

4. The multi-mode adjustable linear water jet device for improvised explosive device disposal as described in claim 1, characterized in that: The explosive (3) has a height of 73 mm, a top surface length of 22 mm, and a charge diameter of 54 mm.

5. The multi-mode adjustable linear water jet device for improvised explosive device disposal as described in claim 1, characterized in that: The shaped charge shell (2) is made of aluminum and has a thickness of 2 mm.

6. The multi-mode adjustable linear water jet device for improvised explosive device disposal as described in claim 1, characterized in that: The device also includes a pressure screw (7), through which the explosive liner is tightly fitted to the lower end of the explosive (3).

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