Embedded high-overload-resistant slapper detonator

Abstract

The utility model belongs to the technical field of initiating explosive devices, and discloses an embedded high-overload-resistant slapper detonator which comprises a shell (1), an output grain (2) is embedded and clamped on one side of the shell (1), a fastening compression ring (3) is clamped on one side of the output grain (2), and a starting grain (4) is clamped on one side, far away from the output grain (2), of the fastening compression ring (3). And an acceleration chamber (5) and a flyer (6) are arranged on one side, far away from the fastening compression ring (3), of the starting grain (4). According to the technical scheme provided by the utility model, the problem of energy transmission interruption or detonation failure caused by assembly looseness is avoided, the structural stability and reliability of the detonator in a high overload environment are greatly improved, and normal detonation under various extreme conditions is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of pyrotechnics technology, specifically relating to an embedded high-overload resistant impact detonator. Background Technology

[0002] In modern defense, military, and industrial blasting, impact detonators are key initiating elements. Their performance directly affects the combat effectiveness of weapon systems and the safety and accuracy of industrial blasting. In military applications, high-precision and high-reliability impact detonators are core components that ensure the accurate detonation and expected power of various munitions, rocket engines, missile warheads, and other weapons and equipment in complex environments. For example, in precision-guided weapons, impact detonators need to operate stably under extreme conditions such as high overload (such as the huge acceleration impact during launch; the impact acceleration of vehicle-mounted equipment may exceed 5000g, the impact acceleration of artillery ammunition may exceed 10000g, and the impact acceleration of hard target penetrating ammunition may reach more than 100,000g), high temperature, high pressure, and strong vibration to achieve reliable detonation, so as to ensure that the weapon can accurately hit the target and effectively destroy it.

[0003] In the field of industrial blasting, such as mining, tunneling, and building demolition, impact detonators are used to control the detonation sequence and timing of explosives to achieve safe and efficient blasting operations. Different engineering scenarios have strict requirements for blasting effects and safety, requiring impact detonators to have stable detonation performance, anti-interference ability, and a certain high overload resistance to adapt to complex operating environments and precise blasting needs.

[0004] Traditional impact detonators have significant structural design flaws under high overload conditions. The connections between components are mostly simple mechanical snap-fits or threaded connections, lacking effective buffering and fixing mechanisms. Under high overload impact, the components are prone to relative displacement, loosening, or even detachment, leading to damage to the internal structure of the detonator. This affects the stability and reliability of the detonation sequence, and can cause serious safety problems such as detonation failure or accidental detonation. For example, during artillery firing, traditional impact detonators may be unable to withstand the huge acceleration impact, causing a change in the alignment between the transducer and the acceleration chamber. The flying discs may not be properly sheared, accelerated, and impacted with the initial propellant, resulting in insufficient detonation energy and failure to detonate the next charge or warhead. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The technical problem this invention aims to solve is that the connection between the components of traditional impact detonators is mostly a simple mechanical snap-fit ​​or threaded connection, which lacks an effective buffer and fixing mechanism, making it easy for relative displacement, loosening, or even detachment of the components to occur, causing safety problems.

[0007] (II) Technical Solution

[0008] To solve the above technical problems, this utility model provides an embedded high overload resistant impact detonator, including a housing 1, an output charge 2 is embedded and snapped into one side of the housing 1, a fastening ring 3 is snapped into one side of the output charge 2, an initiating charge 4 is snapped into the side of the fastening ring 3 away from the output charge 2, and an acceleration chamber 5 and a flyer 6 are provided on the side of the initiating charge 4 away from the fastening ring 3.

[0009] The starting propellant 4 is located inside the fastening ring 3, the acceleration chamber 5 and the flyer plate 6 are located between the transducer 7 and the starting propellant 4, and the output propellant 2 is located between the fastening ring 3 and the housing 1. The transducer 7 is installed in an embedded design with the acceleration chamber 5, the flyer plate 6 and the starting propellant 4, and is embedded inside the cavity of the electrode plug 8. The fastening ring 3 is used to fasten and position the starting propellant 4. The fastening ring 3 is laser welded to the outer wall of the electrode plug 8.

[0010] Furthermore, a boss is provided on the outer wall of the housing 1.

[0011] Furthermore, the transducer 7 adopts an integrated design.

[0012] Furthermore, the transducer 7 is tightly and integrally installed with the fly plate 6, the acceleration chamber 5, and the propellant charge 4.

[0013] (III) Beneficial Effects

[0014] Compared with existing technologies, this utility model has the following advantages: It adopts an embedded design, tightly connecting the transducer, acceleration chamber, flyer, and propellant charge into a single unit, forming a stable connection structure between the components. Under high overload conditions, such as the enormous acceleration impact during weapon firing (vehicle-mounted equipment requires an impact acceleration greater than 5000g, artillery ammunition requires an impact acceleration greater than 10000g, and hard target penetrating ammunition requires an impact acceleration exceeding 100,000g), this tightly connected embedded design can effectively resist the damage of overload forces to the components, preventing loosening, displacement, or even detachment. Compared with traditional detonators, it avoids the problem of energy transfer interruption or detonation failure caused by component loosening, greatly improving the structural stability and reliability of the detonator under high overload conditions, ensuring normal detonation under various extreme conditions. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present invention;

[0016] Figure 2 This is a side view of the present invention.

[0017] Figure 3 This is a diagram showing the internal assembly relationship of some parts of this utility model.

[0018] In the diagram: 1. Housing; 2. Output propellant; 3. Fastening ring; 4. Initial propellant; 5. Acceleration chamber; 6. Flying plate; 7. Transducer; 8. Electrode plug. Detailed Implementation

[0019] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0020] like Figure 1-3 As shown, the embedded high overload resistant impact detonator of this embodiment includes a housing 1. An output charge 2 is embedded and snapped into one side of the housing 1. A fastening ring 3 is snapped into one side of the output charge 2. An initiating charge 4 is snapped into the side of the fastening ring 3 away from the output charge 2. An acceleration chamber 5 and a flyer 6 are provided on the side of the initiating charge 4 away from the fastening ring 3. A transducer 7 is snapped into the initiating charge 4 through the acceleration chamber 5 and the flyer 6. An electrode plug 8 is snapped into the initiating charge 4 through the acceleration chamber 5, the flyer 6 and the transducer 7.

[0021] This utility model is further described in detail. The initial propellant 4 is located inside the fastening ring 3. The acceleration chamber 5 and the flyer plate 6 are located between the transducer 7 and the initial propellant 4. The output propellant 2 is located between the fastening ring 3 and the housing 1. The transducer 7 and the acceleration chamber 5, flyer plate 6 and initial propellant 4 are connected by an embedded design and embedded inside the cavity of the electrode plug 8. The fastening ring 3 is used to fasten and position the initial propellant 4. Then, the fastening ring 3 and the outer wall of the electrode plug 8 are laser welded together to further improve the fastening and high overload resistance of the core components of the impact detonator.

[0022] As can be seen from the above, when the external detonation circuit receives the detonation command, the current pulse is transmitted to the transducer 7 through the preset wire. The transducer 7 is the core component for energy conversion of this impact detonator. It is usually made of sensitive materials (copper, gold) with specific electrical and mechanical properties, such as explosive foil. Under the action of the current pulse, complex physical changes occur inside the transducer 7. Taking the explosive foil as an example, when the current passes through its narrow bridge region, a large amount of Joule heat is generated due to the resistance effect, which causes the bridge region material to heat up rapidly. When the temperature reaches the melting point, boiling point or even phase change of the material, the bridge region material vaporizes and ionizes in a very short time to form high temperature and high pressure plasma. This process realizes the rapid conversion of electrical energy into plasma internal energy, providing the initial energy drive for the subsequent detonation process.

[0023] The plasma generated by transducer 7 has extremely high pressure and temperature, forming a powerful impact force in an instant. Since the acceleration chamber 5 and the flyer plate 6 are located between transducer 7 and the initial propellant 4, and are tightly connected to transducer 7 through embedded snap-fit, the impact force of the plasma acts directly on the flyer plate 6. The flyer plate 6 is generally made of high-strength, low-density metal or non-metal materials, with good toughness and kinetic energy transfer performance. Under the high pressure drive of the plasma, the flyer plate 6 overcomes the initial friction force between itself and the acceleration chamber 5 and begins to move at high speed along the inner wall of the acceleration chamber 5.

[0024] The acceleration chamber 5 plays a crucial role. It has a specific shape and size, which can precisely guide and accelerate the movement of the flyer 6. The inner wall of the acceleration chamber 5 is usually designed as a smooth channel with a certain taper or curvature. When the flyer 6 enters the acceleration chamber 5 under the propulsion of plasma, the special structure of the acceleration chamber 5 causes the plasma pressure to be gradually focused in the direction of the flyer 6's movement, so as to more effectively convert the plasma energy into the kinetic energy of the flyer 6. As the flyer 6 is continuously accelerated in the acceleration chamber 5, its speed increases rapidly and its kinetic energy increases sharply, accumulating enough energy for impacting the initiating charge 4.

[0025] After the flying disc 6 is accelerated by the acceleration chamber 5, it impacts the starting charge 4 at an extremely high speed. The starting charge 4 is located inside the fastening ring 3. The fastening ring 3 not only fastens and positions the starting charge 4, but also provides a stable installation environment for the starting charge 4, ensuring that the starting charge 4 is fixed in position and will not be displaced when it is impacted by the flying disc 6. When the flying disc 6 impacts the starting charge 4 at high speed, it generates a strong impact load, causing the explosive particles inside the starting charge 4 to be subjected to compression, friction and shearing, and the temperature and pressure in the local area rise sharply.

[0026] When the impact load reaches the detonation threshold of the explosive in the initiating charge 4, the explosive undergoes a detonation reaction. Detonation is a violent chemical reaction that propagates at supersonic speed, accompanied by high temperature, high pressure and the generation of a large amount of gas. The detonation reaction of the initiating charge 4 rapidly releases huge chemical energy, forming a powerful detonation wave. The detonation wave propagates in all directions at extremely high speed, and its pressure and energy are far higher than the initial impact generated by the flying piece 6, providing a powerful force for the subsequent detonation process.

[0027] The detonation wave generated by the initiating charge 4 is rapidly transmitted to the output charge 2 through the space between the fastening ring 3 and the shell 1, as well as the tight connection structure between the components. Since the output charge 2 is embedded and snapped into the inner side of the shell 1 and connected to the fastening ring 3, this connection method ensures the efficiency and stability of the detonation wave during transmission, reduces energy loss and scattering. During the transmission process, the pressure and energy of the detonation wave continuously act on the output charge 2, causing the explosive inside the output charge 2 to be further compressed and excited.

[0028] When the detonation wave reaches the key part of the output charge 2, causing the explosive inside to reach the detonation conditions, the output charge 2 undergoes a detonation reaction. The detonation reaction of the output charge 2 is larger in scale and stronger in energy. The detonation products produced expand outward at extremely high speed, releasing huge amounts of energy. This energy is transferred to the external explosive or other devices that need to be detonated through a specific structure of the shell 1 (such as the output end), realizing the final detonation function, such as triggering the explosion of the ammunition or propelling the combustion of the rocket engine.

[0029] This impact detonator adopts an embedded design. The transducer 7, acceleration chamber 5, fly plate 6, and propellant charge 4 are tightly connected together by a precise snap-fit ​​installation method to form an integrated structure. Under high overload environments, such as the huge acceleration impact during weapon firing and the strong vibration during projectile penetration, this embedded design can effectively resist the action of external overload forces and prevent relative displacement, loosening, or even detachment between components. The tight connection between components ensures the integrity and stability of the internal structure of the detonator, ensures the smooth energy transfer path, and enables the detonation process to proceed smoothly according to design requirements.

[0030] Embedded design reduces gaps and poor contact between components, and reduces energy loss during transmission. During the acceleration of flyer plate 6 and the transmission of detonation wave, the tightly connected structure enables energy to be transferred more efficiently from transducer 7 to flyer plate 6, then from flyer plate 6 to the initiating charge 4, and finally to the output charge 2. This efficient energy transfer mechanism improves the detonator's initiation energy utilization rate, enabling the output charge 2 to produce a more powerful detonation effect, meeting the requirements of different application scenarios for initiation energy and accuracy.

[0031] In high overload environments, there is often strong electromagnetic interference and mechanical vibration interference. The embedded structure of this utility model improves the anti-interference capability of the detonator to a certain extent. The tightly connected core components reduce the impact of external interference on the internal circuit and components. For example, electromagnetic interference is difficult to enter the detonator through the gaps between components and affect the normal operation of the transducer 7. At the same time, the reasonable embedded layout and the interaction between components can buffer mechanical vibration interference to a certain extent and ensure the stable detonation performance of the detonator in high overload and complex interference environments.

[0032] The features and functions of the fastening ring 3 are as follows: the upper part is reserved for the position of the propellant column sleeve of the initial charge assembly. The initial charge assembly can be pressed tightly through tolerance control. The fastening ring 3 is welded to the outer wall of the electrode plug 8 by laser welding to fasten it, which further ensures the reliability of the product design function. Laser welding achieves the purpose of gapless assembly and a certain degree of sealing.

[0033] Finally, by controlling the design dimensions of each component, it is ensured that each interface transducer 7 and flyer 6, flyer 6 and acceleration chamber 5, and acceleration chamber 5 and initial charge assembly, and output charge 2 have good matching and optimization effects. The charge and size of output charge 2 can be designed according to the next-level detonation sequence to ensure the reliability of the detonation sequence.

[0034] It should be noted that: the outer wall of the housing 1 is provided with bosses. By setting the bosses, the local hardness of the surface of the housing parts can be increased, the mass distribution of the parts can be optimized, the mechanical properties of the parts can be improved, the parts can be facilitated to connect with other parts, the connection methods can be more diversified, the parts can be prevented from being misaligned during assembly, a suitable position can be provided for the marking or engraving of the parts, the reliability of the parts in vibration environment and other mechanical environment can be improved, and the resistance of the parts to alternating loads can be enhanced.

[0035] It should be noted that transducer 7 adopts an integrated design. Transducers are generally fabricated by attaching the explosive foil to a hard substrate such as ceramic through magnetron sputtering or electroplating. The integrated transducer 7 has increased transduction efficiency, smaller size, saves space, and the embedded design also improves the loading ratio of the detonator's pyrotechnic agent.

[0036] The embedded high-overload resistant impact detonator, after performance verification at the Hopkinson rod laboratory, meets the axial high overload resistance requirements under acceleration conditions of 82,600 g and 75 μs. High overload matching tests were conducted with the entire projectile containing the fuze, and the detonator fired stably and reliably under overload conditions of 50,000 g and 70 μs.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An embedded high-overload resistant impact detonator, characterized in that, Includes a housing (1), an output propellant column (2) is embedded and snapped into one side of the housing (1), a fastening ring (3) is snapped into one side of the output propellant column (2), an initiating propellant column (4) is snapped into one side of the fastening ring (3) away from the output propellant column (2), and an acceleration chamber (5) and a flyer (6) are provided on the side of the initiating propellant column (4) away from the fastening ring (3); The starting propellant (4) is located inside the fastening ring (3), the acceleration chamber (5) and the flyer (6) are located between the transducer (7) and the starting propellant (4), and the output propellant (2) is located between the fastening ring (3) and the housing (1). The transducer (7) and the acceleration chamber (5), flyer (6) and the starting propellant (4) are connected by an embedded design, which is embedded inside the cavity of the electrode plug (8). The fastening ring (3) is used to fasten and position the starting propellant (4). The fastening ring (3) is laser welded to the outer wall of the electrode plug (8).

2. The embedded high-overload resistant impact detonator as described in claim 1, characterized in that, The outer wall of the shell (1) is provided with a boss.

3. The embedded high-overload resistant impact detonator as described in claim 1, characterized in that, The transducer (7) adopts an integrated design.

4. The embedded high-overload resistant impact detonator as described in claim 1, characterized in that, The transducer (7) is tightly connected and installed as a whole with the flyer (6), the acceleration chamber (5) and the propellant charge (4).

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