Multifunctional annular blasting charging structure based on shock wave superposition effect

Abstract

According to the multifunctional annular blasting charging structure based on the shock wave superposition effect, a plurality of detonation points are annularly and evenly distributed on a detonation plane, circular wavefront propagation and efficient intersection and superposition of detonation waves are achieved by controlling synchronous errors to form a shock wave high-pressure area, and meanwhile the detonation waves crush an inner layer shell to form high-speed metal jet flow. The core of the invention lies in that the directional energy enhancement and detonation-energy-gathered penetration composite damage effect of the blasting charge structure is realized by accurately regulating and controlling the wave system interference effect and the metal jet flow forming mechanism.

Description

Technical Field

[0001] The invention belongs to the field of explosion mechanics and initiation technology, and in particular relates to a multifunctional annular blasting charge structure based on shock wave superposition effect. Background Art

[0002] In explosion physics, traditional annular blasting charge structures usually use a single-point initiation method. This initiation method has poor utilization of explosion energy, and the resulting detonation wave propagates unevenly, making it difficult to form efficient directional release. It is impossible to simultaneously achieve the composite damage effect of directional enhancement of shock waves and formation of metal jets, and its application scenarios are limited. Summary of the Invention

[0003] The present invention proposes a multifunctional annular blasting charge structure based on shock wave superposition effect.

[0004] The technical solution for achieving the purpose of the present invention is: a multifunctional annular blasting charge structure based on the shock wave superposition effect, comprising a battery and control module, a first shell, a wire, a detonator, a second shell, a booster charge, a third shell, explosives, and a fourth shell;

[0005] The shell four is arranged inside the shell three, and an annular cavity is formed between the shell four and the shell three. The explosive is arranged in the annular cavity and is radially constrained and fixed by the shell four; a booster is arranged on the top of the explosive, and the shell two is arranged at the top of the shell three, which is used to fix the booster and the shell four; the shell two is provided with the same number of blind holes as the boosters, and the detonators are connected one-to-one with the boosters through the blind holes. The battery and the control module are arranged in the shell two and are connected to the detonators through wires for controlling the detonation of the detonators. The shell one is sealed with the shell three through threads.

[0006] Compared with the existing technology, the present invention has the following significant advantages: the present invention ensures the precise intersection of detonation waves by evenly arranging multiple detonation points and synchronously controlling the detonation with high precision, thereby achieving stable detonation wave superposition and significantly improving energy utilization. This design provides a new technical approach for enhancing the explosion damage effect.

[0007] The present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A two-dimensional schematic diagram of a multifunctional annular blasting charge structure based on shock wave superposition effect.

[0009] Figure 2 Lay out a floor plan for the detonation point.

[0010] Figure 3 Schematic diagram of the shock wave superimposed on the high-pressure area.

[0011] Figure 4 This is a comparison of the superimposed wave pressure cloud maps of different numbers of detonation points in the annular charge structure.

[0012] Figure 5 This is a schematic diagram of the detonator synchronous detonation control principle.

[0013] Figure 6 This is the effect diagram of jet molding. DETAILED DESCRIPTION

[0014] A multifunctional annular blasting charge structure based on the shock wave superposition effect has at least three detonation points (N≥3) evenly distributed in a circular pattern on the detonation plane. By controlling the synchronization error, the circular wavefront propagation and efficient intersection of the detonation wave are achieved, superimposed to form a shock wave high-pressure area, and at the same time, the detonation wave crushes the inner shell to form a high-speed metal jet. The core of the present invention is to achieve the directional energy enhancement and detonation-focused energy penetration composite damage effect of the blasting charge structure by precisely controlling the wave interference effect and the metal jet formation mechanism. Compared with the traditional single-point detonation method, the present invention increases the utilization rate of the explosion energy by more than 80% and has outstanding advantages in directional energy focusing. Without changing the existing charge structure, the present invention can achieve dual efficient directional release of directional superposition release of shock waves and formation of central focused energy jets by simply optimizing the layout of the detonation points and the shell structure design.

[0015] A multifunctional annular blasting charge structure based on a shock wave superposition effect comprises a battery and control module (1), a first shell (2), a wire (3), a detonator (4), a second shell (5), a booster charge (6), a third shell (7), explosives (8) and a fourth shell (9);

[0016] The shell four (9) is arranged inside the shell three (7), and an annular cavity is formed between the shell four (9) and the shell three (7). The explosive (8) is arranged in the annular cavity and is radially constrained and fixed by the shell four (9); a booster (6) is arranged on the top of the explosive (8), and the shell two (5) is arranged on the top of the shell three (7) for fixing the booster (6) and the shell four (9); the shell two (5) is provided with the same number of blind holes as the booster (6), and the detonator (4) passes through the blind holes and is connected to the booster (6) in a one-to-one correspondence. The battery and control module (1) are arranged in the shell two (5) and are connected to the detonator (4) through a wire (3) for controlling the detonation of the detonator (4). The shell one (2) is sealed with the shell three (7) through a thread.

[0017] In a further embodiment, the detonating end of the detonator is coaxial with the booster charge (6).

[0018] In a further embodiment, the booster charges (6) are arranged at equal intervals on top of the explosive (8).

[0019] In a further embodiment, the number N of the booster charge (6) and the detonator satisfies:

[0020]

[0021] Among them, D i is the inner diameter of the explosive, D o is the outer diameter of explosive, D m is the mean diameter of the explosive, δ is the thickness of the explosive wavefront

[0022] In a further embodiment, the diameter of the circle where the booster charge (6) is located is the distribution diameter D s , distribution diameter D s satisfy:

[0023] D s =(0.6±0.1)D o

[0024] Where D o is the outer diameter of the explosive.

[0025] In a further embodiment, the distance d between adjacent boosters (6) satisfies:

[0026]

[0027] Where D m is the mean diameter of the explosive, and N is the number of booster charges (6).

[0028] In a further embodiment, the charge thickness t of the explosive (8) is:

[0029]

[0030] The detonation wave front thickness δ of the explosive and the charge thickness t satisfy:

[0031]

[0032] The axial length L and the median diameter D of the explosive m The ratio satisfies:

[0033] In a further embodiment, the thickness h1 of the shell three satisfies:

[0034] 0.1D m ≤h1≤0.3D m

[0035] Where D m The median diameter of the explosive.

[0036] The shell thickness h2 satisfies:

[0037] h2=0.8~1h1

[0038] In a further embodiment, the detonators are connected to the same group of switches through a parallel circuit. When a single branch fails to open, the other branches detonate normally. A current limiting resistor is set for each detonator branch. When a single detonator short-circuits, the other detonators detonate normally, thereby improving the detonation stability.

[0039] The detonator model in the present invention is unified, each detonator branch is connected in series with a 0.5-2Ω current limiting resistor, the independent loop inductance is ≤50nH, parallel copper foil strips are used for wiring (thickness ≥0.1mm, spacing ≤1mm), and the circuit wiring length difference is ≤5mm to ensure timing consistency and the maximum allowable synchronization error Δt max satisfy:

[0040]

[0041] Among them, v is the explosion of explosives.

[0042] Example

[0043] A multifunctional annular blasting charge structure based on shock wave superposition effect, which is an annular charge, the explosive is HMX, the outer diameter D0 = 120mm, the inner diameter D i =40mm, median diameter D m =80mm Shell 3 thickness h1 is 14mm, Shell 4 thickness h2 is 14mm, axial length L = 120mm, charge thickness t = 40mm, number of detonation points N = 6 (preferred value), distribution diameter D s =100mm (±10% tolerance), the distance between adjacent detonation points d = 83.3mm> 5mm, the wavefront thickness δ = 2mm, the thickness ratio The shell material is tungsten copper alloy with an acoustic impedance of 40×10 6 kg / (m 2 ·s), surface roughness Ra=1.2μm, parallel copper foil strip wiring, v=9100m / s, detonator model is EFP-12, detonator synchronization error is 13μs<Δt max ≈15μs. This example can achieve circumferentially uniform damage, a pressure gain of 4 times, and the detonation wave crushes the inner shell to form a high-speed metal jet. The energy utilization rate is 83% (the energy utilization rate of single-point detonation is 35%).

[0044] The present invention arranges evenly distributed detonation points on the detonation surface of the annular charge structure. The present invention adopts a multi-detonator parallel control system to synchronously trigger all detonation points, so that the detonation waves propagate evenly and interfere with each other. The detonation waves of the present invention intersect at a specific position to form a high-pressure superposition area, and the circumferential pressure of the annular charge is increased; by adjusting the number of detonation points N and the distribution diameter D s , the position and intensity of the high-pressure superposition area can be controlled, and the detonation wave crushes the inner shell to form a high-speed metal jet, realizing the enhanced effect of central directional concentrated energy damage and multi-point directional blasting damage.

Claims

1. A multifunctional annular blasting charge structure based on shock wave superposition effect, characterized in that: It includes a battery and control module (1), a housing (2), a wire (3), a detonator (4), a housing (5), a booster (6), a housing (7), explosives (8) and a housing (9); The shell four (9) is arranged inside the shell three (7), and an annular cavity is formed between the shell four (9) and the shell three (7). The explosive (8) is arranged in the annular cavity and is radially constrained and fixed by the shell four (9); a booster (6) is arranged on the top of the explosive (8), and the shell two (5) is arranged on the top of the shell three (7) for fixing the booster (6) and the shell four (9); the shell two (5) is provided with the same number of blind holes as the booster (6), and the detonator (4) passes through the blind holes and is connected to the booster (6) in a one-to-one correspondence. The battery and control module (1) are arranged in the shell two (5) and are connected to the detonator (4) through a wire (3) for controlling the detonation of the detonator (4). The shell one (2) is sealed with the shell three (7) through a thread.

2. The multifunctional annular blasting charge structure based on shock wave superposition effect according to claim 1 is characterized in that: The detonating end of the detonator and the explosive charge (6) are kept coaxial.

3. The multifunctional annular blasting charge structure based on shock wave superposition effect according to claim 1 is characterized in that: The booster charges (6) are arranged at equal intervals on top of the explosive (8).

4. The multifunctional annular blasting charge structure based on shock wave superposition effect according to claim 3 is characterized in that: The number N of booster charge (6) and detonator satisfies: Among them, D i is the inner diameter of the explosive, D o is the outer diameter of explosive, D m is the mean diameter of the explosive, and δ is the thickness of the explosive wavefront.

5. The multifunctional annular blasting charge structure based on shock wave superposition effect according to claim 3 is characterized in that: The diameter of the circle where the booster charge (6) is located is the distribution diameter D s , distribution diameter D s satisfy: D s =(0.6±0.1)D o Where D o is the outer diameter of the explosive.

6. The multifunctional annular blasting charge structure based on shock wave superposition effect according to claim 3 is characterized in that: The distance d between adjacent boosters (6) satisfies: Where D m is the mean diameter of the explosive, and N is the number of booster charges (6).

7. The multifunctional annular blasting charge structure based on shock wave superposition effect according to claim 3 is characterized in that: The charge thickness t of explosive (8) is: The detonation wave front thickness δ of the explosive and the charge thickness t satisfy: The axial length L and the median diameter D of the explosive m The ratio satisfies:

8. The multifunctional annular blasting charge structure based on shock wave superposition effect according to claim 1 is characterized in that: The thickness h1 of the shell three satisfies: <h2 style=";text-align:left;direction:ltr">0.1D<h2 style=";text-align:left;direction:ltr"> m <h2 style=";text-align:left;direction:ltr"> ≤h1≤0.3D<h2 style=";text-align:left;direction:ltr"> m Where D m The median diameter of the explosive.

9. The multifunctional annular blasting charge structure based on shock wave superposition effect according to claim 8, characterized in that: The shell thickness h2 satisfies: h2=0.8~1h1 10. The multifunctional annular blasting charge structure based on shock wave superposition effect according to claim 1, characterized in that: The detonators are connected to the same set of switches through a parallel circuit. When a single branch fails to open, the other branches will detonate normally. A current-limiting resistor is set for each detonator branch. When a single detonator is short-circuited, the other detonators will detonate normally.

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