Delayed detonation function structure of energy gathering and blasting series warhead

Abstract

The invention provides a delayed detonation functional structure of a shaped charge and blasting series warhead. The delayed detonation functional structure comprises a cylindrical detonation propagation channel arranged between shaped charge and blasting charge; the explosion propagation channel is arranged in the shell, and the explosion suppression layer and the multi-stage explosion propagation sequence are arranged in the explosion propagation channel; the booster sequence sequentially comprises a low-speed delay explosive, a first-stage explosive assistant, an insensitive booster explosive, a second-stage explosive assistant and an initiating explosive. And the explosion-proof layer is used for ensuring that the low-speed delay powder is kept in a stable working state. In the working process, the low-speed delay explosive achieves the delay effect, when energy is spread to the tail, the insensitive booster explosive is detonated through the assistant explosive, detonation is generated, then the initiating explosive is detonated after the energy of the assistant explosive is amplified, finally the blasting charge is detonated through the initiating explosive, and after it is ensured that energy-gathered jet flow is completely formed, the blasting charge is triggered to be detonated. Therefore, the expected delayed blasting effect is achieved. The delay stability is guaranteed through the explosion-proof layer, and combustion delay, detonation conversion and pressure compensation are innovatively integrated into a single system.

Description

Technical Field

[0001] This application relates to the field of high-efficiency damage technology, and particularly relates to a delay initiation functional structure of a shaped charge and blast series warhead. Background Art

[0002] Traditional mechanical delay devices rely on precision gear sets and escapement mechanisms to achieve delay control through physical transmission. The core defect of traditional mechanical delay devices stems from the mechanical sensitivity of the rigid structure. Under external impact, vibration will cause micro-deformation of the gears, resulting in inaccurate pendulum periods. And in high-temperature environments, thermal expansion of metals will further amplify the timing deviation. Chemical delay charges (such as lead tetraoxide-silicon-based agents) control the burning rate through redox reactions, but are greatly affected by the environment. When the humidity > 80%, the burning rate fluctuates by 15%, and the burning rate change rate exceeds 30% in the temperature range of 0 - 50°C. Defects in the charge pressing process of the agent will cause combustion wave distortion, resulting in "flameout" or abnormal acceleration of the burning rate.

[0003] The systematic deficiencies of traditional delay initiation technologies in terms of accuracy, energy transfer, and safety have made it an urgent need to develop a reliable and accurate initiation system. Summary of the Invention

[0004] This application provides a delay initiation functional structure of a shaped charge and blast series warhead, which can be used to solve the technical problem of the lack of a reliable and accurate initiation system.

[0005] This application provides a delay initiation functional structure of a shaped charge and blast series warhead, and the structure includes:

[0006] As Figure 1 shown, a cylindrical transfer explosive channel is arranged between the shaped charge and the blast charge. The transfer explosive channel is arranged in the outer shell, and an explosion isolation layer and a multi-stage transfer explosive sequence are arranged in the transfer explosive channel to achieve delayed initiation;

[0007] The transfer explosive sequence successively includes a low-speed delay charge, a first-stage booster charge, an insensitive transfer explosive charge, a second-stage booster charge, and a detonating charge.

[0008] The explosion isolation layer is arranged at the end of the transfer explosive channel close to the shaped charge, and is a cylinder with a thickness of 3 - 10 mm. The diameter of the explosion isolation layer is the same as the inner diameter of the transfer explosive channel. The upper surface is in contact with the shaped charge, and the lower surface is in contact with the low-speed delay charge;

[0009] The low-speed delay charge, the first-stage booster charge, the insensitive transfer explosive charge, the second-stage booster charge, and the detonating charge are all cylindrical charge columns, and are successively and tightly arranged in the transfer explosive channel.

[0010] The detonating charge is arranged at the other end of the transfer explosive channel and is in contact with the blast charge.

[0011] A flameproof layer is provided between the shaped charge and the low-speed delay charge to ensure the stable operation of the low-speed delay charge. To ensure the normal operation of the low-speed delay charge, according to the shock wave penetration formula P X = P0×e -αx , P X is the critical shock pressure of the delay charge; P0 is the shock wave pressure after the shaped charge detonates; α is the attenuation coefficient, which is related to the material of the flameproof layer; x is the thickness of the flameproof layer, and the range is 3 - 10 mm.

[0012] During operation, the low-speed delay charge is used for time delay. The energy transmission is stable, the wide-range burning rate can be adjusted, and energy compensation can be carried out through the booster charge. According to where t is the time required for the jet to be fully formed, v is the burning rate of the low-speed delay charge, and l is the length of the low-speed delay charge column. The length of the low-speed delay charge column is set according to the required time delay and the burning rate.

[0013] If the insensitive booster charge can detonate the primary explosive alone, the detonation path successively includes the low-speed delay charge, the first-stage booster charge, the insensitive booster charge, and the primary explosive.

[0014] The detonation paths of the booster charges are arranged symmetrically and uniformly along the circumferential direction of the axis of the warhead, and the number includes 1, 2, or 4.

[0015] The blasting process of the time-delay detonation functional structure is as follows:

[0016] The low-speed delay charge is used for time delay. After the time-delay work is completed, the insensitive booster charge is detonated through the first-stage booster charge. The first-stage booster charge is used to help the low-speed delay charge detonate the insensitive booster charge to generate detonation;

[0017] After the energy is amplified by the second-stage booster charge, the primary explosive is detonated, and then the blasting charge is detonated;

[0018] The jet is formed by the shaped charge at the rear stage to first penetrate and damage the target. After the shaped charge structure detonates at the rear stage, a detonation reaction occurs, and the liner is crushed to form a shaped jet;

[0019] The blasting charge at the front stage explodes again and acts on the target to cause a better damage effect.

[0020] If the time-delay detonation functional structure does not include the second-stage booster charge, the blasting charge is directly detonated by the primary explosive. It can ensure that after the shaped jet is fully formed and even penetrates the target, the blasting charge is detonated, so as to achieve the expected time-delay blasting damage effect.

[0021] A detonation isolation layer is arranged between the shaped charge and the low-speed delay charge to ensure stable energy transmission only under impact; precise millisecond-level delay is achieved by adjusting the length and burning rate of the low-speed delay charge column; after the delay ends, the first-stage booster charge converts combustion into detonation and detonates the insensitive booster charge to stably propagate the detonation, and then the second-stage booster charge compensates for energy attenuation, and finally reliably detonates the primer charge to fully detonate the blasting charge.

[0022] Specifically, it takes a certain time for the shaped charge jet to form and stabilize. Premature detonation will cause the jet to not fully focus, thus significantly reducing the penetration depth. By precisely controlling the detonation timing, after the jet is fully formed and a radial crack network is formed on the target surface, the blasting charge is triggered to implement secondary damage, so as to achieve the synergistic effect of shaped charge penetration and blasting damage expansion, and finally achieve a better damage effect.

[0023] Through the triple technologies of detonation isolation, energy gradient amplification of double booster charges, and combustion-detonation conversion, this application realizes the synergistic damage of shaped charge jet and blasting while ensuring safety, and finally achieves the optimal damage effect.

[0024] Among them, both the shaped charge and the blasting charge are high-energy explosives.

[0025] The advantages of the present invention are: 1) The detonation isolation layer enables stable energy transmission of the low-speed delay charge, ensures the stability of combustion delay, and can be flexibly used by changing the material and thickness of the detonation isolation layer according to the types of the shaped charge and the low-speed delay charge; 2) The low-speed delay charge column can be quickly adapted to different requirements by replacing the length; 3) Booster charges are used for energy compensation to ensure the normal operation of the entire booster train; 4) Combustion delay, detonation conversion, and pressure compensation are integrated into a single system. Brief Description of the Drawings

[0026] Figure 1 is a schematic diagram in the warhead provided by the embodiment of the present application;

[0027] Figure 2 is a cross-sectional schematic diagram of the contact surface between the booster charge channel and the shaped charge provided by the embodiment of the present application;

[0028] Figure 3 is a schematic diagram of the casing provided by the embodiment of the present application;

[0029] Figure 4 is a schematic diagram of the booster channel and the interior provided by the embodiment of the present application.

[0030] In the figure, 1 - shaped charge, 2 - detonation isolation layer, 3 - low-speed delay charge, 4 - first-stage booster charge, 5 - insensitive booster charge, 6 - second-stage booster charge, 7 - primer charge, 8 - blasting charge, 9 - liner, 10 - casing. Detailed Embodiment

[0031] To make the objectives, technical solutions and advantages of this application clearer, the following will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0032] First, the embodiments of this application will be introduced below with reference to the accompanying drawings.

[0033] The present invention provides a delay initiation functional structure for a shaped charge and blasting series warhead. A detonating channel is arranged between the shaped charge and the blasting charge, and a multi-stage detonation sequence is arranged. This sequence successively includes a low-speed delay charge, a first-stage booster charge, a insensitive detonating charge, a second-stage booster charge and a detonating charge. A flameproof layer is arranged between the shaped charge and the low-speed detonating charge to ensure stable energy transmission of the low-speed detonating charge; a two-stage booster charge design is adopted. The first stage realizes energy amplification and detonates the insensitive detonating charge, and the second stage compensates for the energy attenuation of the insensitive detonating charge to detonate the detonating charge, and the detonating charge completely detonates the blasting charge; by precisely controlling the burning time of the low-speed delay charge, it is ensured that the shaped charge jet is fully formed before detonating the blasting charge. The present invention solves the key problems of insufficient timing control accuracy and incomplete detonation of insensitive explosives in the traditional technology.

[0034] The following further elaborates this application with specific embodiments.

[0035] Embodiment 1

[0036] Figure 1 It is a schematic diagram of the warhead. As Figure 1 shown, it includes (1) shaped charge, (2) flameproof layer, (3) low-speed delay charge, (4) first-stage booster charge, (5) insensitive detonating charge, (6) second-stage booster charge, (7) detonating charge, (8) blasting charge, (9) liner, (10) housing.

[0037] Among them, both the shaped charge (1) and the blasting charge (8) are selected as 8701 explosive. Through the shock wave penetration formula P X =P0×e -αx , the material of the flameproof layer (2) is selected as armor steel, the attenuation coefficient α = 0.3, the low-speed delay charge (3) is selected as low-nitrogen nitrocellulose, the ignition pressure threshold is 0.3 GPa, and the thickness of the steel flameproof layer is 4 mm. According to It takes 200 ms for the jet to be fully formed, and the burning rate of low-nitrogen nitrocellulose is 5 mm / s. Therefore, the minimum charge thickness of the low-speed delay charge is 1 mm. The insensitive booster charge (5) is selected as 1,3,5-triamino-2,4,6-trinitrobenzene (2,4,6-Triamino-1,3,5-trinitrobenzene; TATB). Therefore, the first-stage booster charge (4) is selected as Research Department Explosive (RDX) for energy amplification. To fully initiate the blasting charge (8), the primer (7) is selected as JH-14. Therefore, the second-stage primer (6) is selected as RDX for energy compensation.

[0038] Example 2

[0039] Figure 1 It is a schematic diagram in the warhead. Among them, as Figure 1 shown, it includes (1) shaped charge, (2) intermediate barrier layer, (3) low-speed delay charge, (4) first-stage booster charge, (5) insensitive booster charge, (8) blasting charge, (9) liner, (10) casing.

[0040] Among them, the shaped charge is selected as 8701 explosive, and the blasting charge is selected as Trinitrotoluene (TNT). Since the initiation pressure of TNT is relatively low, the insensitive booster charge (5) can be directly fully initiated by selecting Hexanitrostilbene (HNS). Therefore, the second-stage booster charge (6) and primer are not required. Referring to Example 1, the material of the intermediate barrier layer (2) is selected as 4-mm thick armor steel, the low-speed delay charge (3) is selected as low-nitrogen nitrocellulose, and the first-stage booster charge (4) is selected as RDX for energy amplification.

[0041] Example 3

[0042] Figure 1 It is a schematic diagram of a shaped-charge blasting warhead and the present invention in the warhead. As Figure 1 shown, it includes (1) shaped charge, (2) intermediate barrier layer, (3) low-speed delay charge, (4) first-stage booster charge, (5) insensitive booster charge, (6) second-stage booster charge, (7) primer, (8) blasting charge, (9) liner, (10) casing.

[0043] Among them, the shaped charge is selected as TNT, and the blasting charge is selected as 8701. Through the shock wave penetration formula P X =P0×e -αx , the material of the intermediate barrier layer (2) is selected as low-carbon steel, the attenuation coefficient α = 0.12, the low-speed delay charge (3) is selected as low-nitrogen nitrocellulose, and the ignition pressure threshold is 0.3 GPa. The thickness of the steel intermediate barrier layer can be taken as 5 mm. According to It takes 200 ms for the jet to be fully formed, and the burning rate of low-nitrogen nitrocellulose is 5 mm / s. Therefore, the minimum charge thickness of the low-speed delay charge is 1 mm. The insensitive booster charge (5) selects TATB, so the first-stage booster charge (4) selects RDX for energy amplification. To fully initiate the blasting charge (8), the primary explosive (7) selects JH-14. Therefore, the second-stage primary explosive (6) selects RDX for energy compensation.

[0044] The parts not detailedly disclosed in the present invention belong to the well-known technologies in the art. Although the illustrative specific embodiments of the present invention are described above, the present invention is not limited to the scope of the specific embodiments, and all inventions and creations using the concept of the present invention are within the scope of protection.

Claims

1. A delay initiation functional structure for a combined energy-gathering and blasting tandem warhead, characterized in that, The delay detonation functional structure includes: A cylindrical detonating channel is arranged between the shaped charge (1) and the blasting charge (8); the detonating channel is arranged in the outer shell (10), and an explosion isolation layer (2) and a multi-stage detonating sequence are arranged in the detonating channel; The detonating sequence successively includes a low-speed delay charge (3), a first-stage booster charge (4), a insensitive detonating charge (5), a second-stage booster charge (6) and a primer (7).

2. The delay detonation functional structure according to claim 1, wherein, The explosion isolation layer (2) is arranged at the end of the detonating charge channel close to the shaped charge (1), and is a cylinder with a thickness of 3-10 mm; The diameter of the explosion isolation layer (2) is the same as the inner diameter of the detonating charge channel, the upper surface is in contact with the shaped charge (1), and the lower surface is in contact with the low-speed delay charge (3).

3. The delay detonation functional structure according to claim 1, characterized in that, The primer (7) is arranged at the other end of the detonating channel and is in contact with the blasting charge (8).

4. The delay detonation functional structure according to claim 1, wherein, The low-speed delay charge (3) is used for delay, and the charge column length of the low-speed delay charge (3) is set according to the required delay time and burning rate.

5. The delay initiation functional structure according to claim 1, wherein If the insensitive detonating charge (5) can detonate the primer (7) alone, the detonating channel successively includes a low-speed delay charge (3), a first-stage booster charge (4), an insensitive detonating charge (5), and a primer (7).

6. The delay initiation function structure according to claim 1, wherein, The detonating charge channels are arranged symmetrically and uniformly in the circumferential direction along the central axis of the warhead, and the number includes 1, 2 or 4.

7. The delay detonation functional structure according to claim 1, characterized in that, The blasting process of the delay detonation functional structure is as follows: The low-speed delay charge (3) is used for delay. After the delay work is completed, the insensitive detonating charge (5) is detonated by the first-stage booster charge (4), where the first-stage booster charge (4) is used to help the low-speed delay charge (3) detonate the insensitive detonating charge (5) to generate detonation; Then, after the energy is amplified by the second-stage booster charge (6), the primer (7) is detonated, and then the blasting charge (8) is detonated; The jet is formed by the shaped charge at the rear stage to penetrate and damage the target first. After the shaped charge structure is detonated at the rear stage, a detonation reaction occurs, and the liner (9) is crushed to form a shaped jet; The blasting charge at the front stage explodes again and acts on the target.

8. The delay detonation functional structure according to claim 1, wherein If the delay detonation functional structure does not include the second-stage detonating charge (6), the blasting charge (8) is directly detonated by the primer (7).

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