Slapper detonator based on energy-gathered bridge foil

Abstract

The utility model discloses a slapper detonator based on an energy-gathered bridge foil, which comprises a plug, the upper surface of the plug is provided with a back plate, the center of the upper surface of the back plate is provided with a conical pit, the plug is provided with a pin hole, and a pin is fixedly connected in the pin hole; the energy-gathered bridge foil is arranged on the upper surface of the back plate; the flyer layer is arranged on the upper surface of the energy-gathered bridge foil; the acceleration chamber is arranged on the upper surface of the flyer layer; the explosive ring is arranged on the upper surface of the acceleration chamber, and an insensitive explosive column is arranged in the explosive ring; and the tube shell is arranged at the peripheries of the plug, the contact pin, the energy-gathered bridge foil, the flyer layer, the acceleration chamber and the medicine ring. According to the slapper detonator, the energy-gathered bridge foil is adopted to accelerate the slapper, and the initial pressure is enhanced by utilizing the convergence effect of electric explosion shock waves of the energy-gathered bridge foil, so that the speed of the slapper reaches a higher level, that is, when the speed of the slapper reaches the same level, less energy needs to be injected, and the low-energy ignition of the slapper detonator is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of pyrotechnics, and in particular relates to an impact piece detonator based on energy-gathering bridge foil. Background Art

[0002] Since the concept of Exploding Foil Initiator (EFI) was proposed by Lawrence Livermore Laboratory in the United States in the 1960s, it has attracted widespread attention from researchers at home and abroad. Generally speaking, EFI includes a back plate, a bridge foil, a flying piece, an acceleration chamber, and insensitive explosives. Its basic principle is: by closing the high-voltage switch, the electric energy stored in the pulse power capacitor is released. When a pulse current of thousands of amperes passes through the bridge foil, the metal foil explodes electrically, and the metal vapor and plasma shear and drive the flying piece. After passing through the acceleration chamber, the flying piece reaches a certain speed, and then impacts and detonates the explosive. It can be seen that since EFI does not contain sensitive charges and there is no direct contact between the energy conversion element (flying piece) and the reagent, it has a higher safety.

[0003] In recent years, low-energy ignition is one of the development trends of EFI. The low-energy ignition of EFI greatly reduces the size of the front-end high-voltage power supply module, thereby meeting the needs of in-line fuzes and EFI miniaturization. On the other hand, with the development of insensitive ammunition technology, both the warhead charge and the pyrotechnic charge must meet the relevant safety requirements, which requires that the pyrotechnic must have a strong detonation output power. However, compared with other pyrotechnics, the detonation output pressure of the HNS-IV explosive used in the current impact piece detonator is relatively small. The impact piece detonator in the prior art uses a single bridge foil to produce a single flying piece. The shock wave amplitude generated is limited and can only detonate HNS. For example, a low-ignition energy micro impact piece detonator disclosed in Chinese patent CN113800992B uses conventional bridge foil and flying pieces, and the energy required for detonation is still relatively high. Utility Model Content

[0004] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages to be described below.

[0005] In order to achieve these purposes and other advantages according to the utility model, an impact piece detonator based on a shaped energy bridge foil is provided, comprising:

[0006] The plug has a back plate on its upper surface, a conical pit A with an angle of 45° is provided at the center of the back plate, back plate holes are provided on both sides of the pit A, a pin hole is provided on the plug, and a pin is fixedly connected in the pin hole;

[0007] An energy-gathering bridge foil is arranged on the upper surface of the back plate, the energy-gathering bridge foil comprises two transition areas and a conical energy-gathering bridge area arranged between the two transition areas, a via hole is provided on the transition area, and the pin passes through the back plate hole to contact the energy-gathering bridge foil;

[0008] A flyer layer, which is arranged on the upper surface of the energy-gathering bridge foil, a pit B is arranged at the center of the flyer layer, the pit B is embedded in the energy-gathering bridge area, and the energy-gathering bridge area is embedded in the pit A;

[0009] An accelerating chamber, which is arranged on the upper surface of the flying sheet layer;

[0010] A charge ring, which is arranged on the upper surface of the accelerating chamber, and a sudden explosive column is arranged in the charge ring;

[0011] The tube shell is arranged on the periphery of the plug, the pin, the energy-gathering bridge foil, the flying sheet layer, the accelerating chamber and the medicine ring.

[0012] Preferably, the pin matches and contacts the via hole.

[0013] Preferably, the upper end surface of the energy-gathering bridge foil is flush with the upper end surface of the insertion pin.

[0014] Preferably, the lower end of the tube shell is flush with the lower end of the plug.

[0015] Preferably, the pin is a Cu pin or a conductor or semiconductor pin with a surface coated with a metal such as Cu, Au, Ag, etc.; the plug is an Al 2 O 3 Ceramic stopper.

[0016] Preferably, the back plate is one of a ceramic back plate, a quartz glass back plate, and a plexiglass back plate; the energy-gathering bridge foil is one of an Au bridge foil, an Ag bridge foil, a Cu bridge foil, an Al bridge foil, and a Ni bridge foil; the taper of the energy-gathering bridge area is between 30° and 60°, and the thickness is between 2μm and 6μm.

[0017] Preferably, the flying sheet layer is one of polyimide flying sheets and polychloroparaxylene flying sheets; the accelerating chamber is one of stainless steel accelerating chamber, sapphire accelerating chamber and polyimide accelerating chamber; the medicine ring is a stainless steel medicine ring; and the tube shell is a stainless steel tube shell.

[0018] The utility model at least includes the following beneficial effects: the advantage of the utility model is that the energy-gathering bridge foil is used to accelerate the flying sheet layer, and the convergence effect of the electric explosion shock wave of the energy-gathering bridge foil is utilized to enhance the initial pressure, thereby making the flying sheet speed reach a higher level, that is: when the flying sheet speed reaches the same level, less energy needs to be injected, thereby realizing low-energy ignition of the impact sheet detonator.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An exploded view of an impact piece detonator based on a shaped bridge foil;

[0021] Figure 2 The structure diagram of an impact piece detonator based on energy-gathering bridge foil is shown;

[0022] Figure 3 A cross-sectional view of an impact piece detonator based on a shaped bridge foil;

[0023] Figure 4 It is a partial cross-sectional view of an impact piece detonator based on energy-gathering bridge foil;

[0024] Figure 5 The structure diagram of the back plate of an impact piece detonator based on a shaped energy bridge foil;

[0025] Figure 6 for Figure 5 Cross-section of the middle AA;

[0026] Figure 7 The structure diagram of an energy-gathering bridge foil of an impact piece detonator based on an energy-gathering bridge foil is shown;

[0027] Figure 8 for Figure 7 Cross-section of the BB. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0029] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0030] It should be noted that in the description of the present invention, the orientation or position relationship indicated by the term is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0032] In addition, in the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] like Figures 1 to 8 As shown, an impact piece detonator based on shaped energy bridge foil comprises:

[0034] The plug 2 has a back plate 3 on its upper surface, a conical pit A3-b with an angle of 45° is provided at the center of the back plate 3, back plate holes 3-a are provided on both sides of the pit A3-b, and two pin holes 2-a are provided on the plug 2, and two pins 1 are fixedly connected in the pin holes 2-a;

[0035] An energy-gathering bridge foil 4 is arranged on the upper surface of the back plate 3, and the energy-gathering bridge foil 4 includes two transition areas 4-b and a conical energy-gathering bridge area 4-c arranged between the two transition areas 4-b. A via hole 4-a is provided on the transition area 4-b, and the pin 1 passes through the back plate hole 3-a and contacts the energy-gathering bridge foil 4;

[0036] A flyer layer 5, which is arranged on the upper surface of the energy-gathering bridge foil 4, wherein a pit B5-a is arranged at the center of the flyer layer 5, wherein the pit B5-a is embedded in the energy-gathering bridge area 4-c, and the energy-gathering bridge area 4-c is embedded in the pit A3-b;

[0037] an accelerating chamber 6, which is arranged on the upper surface of the flying sheet layer 5;

[0038] A powder ring 8, which is arranged on the upper surface of the accelerating chamber 6, and a sudden explosive column 7 is arranged in the powder ring 8;

[0039] The tube shell 9 is arranged on the periphery of the plug 2 , the insertion pin 1 , the energy-gathering bridge foil 4 , the flying sheet layer 5 , the accelerating chamber 6 , and the medicine ring 8 .

[0040] Working principle: After the pin 1 is inserted into the pin hole 2-a, the pin 1 and the plug 2 are die-cast as a whole. The through hole 4-a cooperates with and contacts the pin 1, and together with the transition area 4-b and the energy-gathering bridge area 4-c, a discharge circuit is formed. A pulsed large current is input from the pin 1, and the current flows out from the pin 1 through the energy-gathering bridge foil 4. The energy-gathering bridge foil 4 generates electric explosion plasma under the action of the pulsed large current. The initial pressure is enhanced by utilizing the convergence effect of the energy-gathering bridge area 4-c of the energy-gathering bridge foil 4, and then the flying sheet layer 5 is accelerated to several thousand meters per second in the acceleration chamber 6 under the action of the electric explosion plasma, or even to To a higher level, the back plate 3 acts as a reflector to reflect the energy generated by the explosion, so that the energy can be fully utilized. The pit B5-a is embedded in the energy-gathering bridge area 4, and the energy-gathering bridge area 4 is embedded in the pit A3-b, which can be more conducive to concentrating the energy generated by the explosion, while avoiding the formation of gaps between the back plate 3 and the energy-gathering bridge foil 4, and between the energy-gathering bridge foil 4 and the flying sheet layer 5. The sudden explosive 7 in the powder ring 8 realizes detonation output under the short pulse impact of the flying sheet layer 5. At the same time, the powder ring 8 acts as a restraining component to improve the axial detonation output power. The tube shell 9 contains all the above components to form an impact sheet detonator.

[0041] In the above technical solution, the upper end surface of the energy-gathering bridge foil 4 is flush with the upper end surface of the insertion pin 1. The upper end surface of the energy-gathering bridge foil 4 is flush with the upper end surface of the insertion pin 1 to avoid the generation of a gap between the energy-gathering bridge foil 4 and the flying sheet layer 5.

[0042] In the above technical solution, the lower end of the tube shell 9 is flush with the lower end of the plug 2. The tube shell 9 is flush with the lower end of the plug 2 so that all components can be just wrapped in the tube shell 9.

[0043] In the above technical solution, the pin 1 is a Cu pin or a conductor or semiconductor pin with a surface covered with a metal such as Cu, Au, Ag, etc.; the plug 2 is an Al 2 O 3 Ceramic plug. Cu, Au, and Ag are all conductors with good conductivity, which is conducive to the large current discharge required by impact detonators; Al 2 O 3 The ceramic plug acts as a supporting material, which has high hardness, insulation, is easily available and is inexpensive.

[0044] In the above technical solution, the back plate 3 is one of a ceramic back plate, a quartz glass back plate, and an organic glass back plate; the energy-gathering bridge foil 4 is one of an Au bridge foil, an Ag bridge foil, a Cu bridge foil, an Al bridge foil, and a Ni bridge foil; the taper of the energy-gathering bridge area is 30° to 60°, and the thickness is 2μm to 6μm. The ceramic back plate, the quartz glass back plate, and the organic glass back plate act as back plates in impact piece detonators, and they all have a certain hardness, which can constrain the downward propagation of the products after the metal electric explosion in the bridge area, so that the products mainly move to the side of the flying piece; the Au bridge foil, the Ag bridge foil, the Cu bridge foil, the Al bridge foil, and the Ni bridge foil can melt and vaporize at a relatively small energy, and cause an electric explosion; the taper of the energy-gathering bridge area is 30° to 60°, and the thickness is 2μm to 6μm, which is conducive to Mach reflection and detonation of explosives.

[0045] In the above technical solution, the flying sheet layer 5 is one of polyimide flying sheets and polychloroparaxylene flying sheets; the accelerating chamber 6 is one of stainless steel accelerating chamber, sapphire accelerating chamber and polyimide accelerating chamber; the medicine ring 8 is a stainless steel medicine ring; the tube shell 9 is a stainless steel tube shell. Polyimide flying sheets and polychloroparaxylene flying sheets have excellent characteristics such as high temperature resistance, acid and alkali corrosion resistance, and salt spray resistance; stainless steel and sapphire have the characteristics of high hardness, high strength, and easy processing.

[0046] Example

[0047] The Au-plated Cu rod pin 1 is used as a conductor for transmitting large pulse currents. Its diameter is 1 mm and its length is 10 mm. 2 O 3 The ceramic plug 2 is used as a supporting material. It has a diameter of 6 mm and a thickness of 4 mm. It is integrally formed with the pin 1 through die casting. 2 O 3 The ceramic back plate 3 has a thickness of 5 mm, a conical pit 3-b at the center with an angle of 45° and a diameter of 0.6 mm. The Cu energy-gathering bridge foil 4 is arranged on the upper surface of the back plate 3. The energy-gathering bridge area 4-c is used as the main area of ​​electric explosion, and the deposition thickness is 3 μm. The via 4-a contacts the pin 1 to form a discharge circuit. The energy-gathering bridge area 4-c generates electric explosion plasma under the action of a large pulse current. A poly(chloro-p-xylene) flying sheet layer 5 with a thickness of 25 μm is placed on the energy-gathering bridge foil 4. The flying sheet layer 5 is placed on the electric explosion. Under the action of plasma, it is accelerated to several thousand meters per second; a stainless steel acceleration chamber 5 with a thickness of 0.4mm and an aperture of 0.45mm is placed on the flying sheet layer 4 to provide space for the acceleration of the flying sheet layer 4; the insensitive explosive column 7 uses IV type hexanitrostilbene (HNS-IV) explosive to achieve detonation output under the short pulse impact of the flying sheet; the stainless steel powder ring 8 contains the insensitive explosive column 7 as a restraining component to increase the axial detonation output power; the stainless steel tube shell 9 contains all the above components to form an impact sheet detonator.

[0048] Preliminary research shows that under the same ignition conditions, the flying chip speed increases by about 10% to 20%.

[0049] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An impact piece detonator based on energy-gathering bridge foil, It is characterized in that include: The plug has a back plate on its upper surface, a conical pit A with an angle of 45° is provided at the center of the back plate, back plate holes are provided on both sides of the pit A, a pin hole is provided on the plug, and a pin is fixedly connected in the pin hole; An energy-gathering bridge foil is arranged on the upper surface of the back plate, the energy-gathering bridge foil comprises two transition areas and a conical energy-gathering bridge area arranged between the two transition areas, a via hole is provided on the transition area, and the pin passes through the back plate hole to contact the energy-gathering bridge foil; A flyer layer, which is arranged on the upper surface of the energy-gathering bridge foil, a pit B is arranged at the center of the flyer layer, the pit B is embedded in the energy-gathering bridge area, and the energy-gathering bridge area is embedded in the pit A; An accelerating chamber, which is arranged on the upper surface of the flying sheet layer; A charge ring, which is arranged on the upper surface of the accelerating chamber, and a sudden explosive column is arranged in the charge ring; The tube shell is arranged on the periphery of the plug, the pin, the energy-gathering bridge foil, the flying sheet layer, the accelerating chamber and the medicine ring.

2. The impact piece detonator based on the shaped bridge foil according to claim 1, It is characterized in that The pins are matched with and in contact with the via holes.

3. The impact piece detonator based on the shaped bridge foil according to claim 1, It is characterized in that The upper end surface of the energy-gathering bridge foil is flush with the upper end surface of the insertion pin.

4. The impact piece detonator based on the shaped bridge foil according to claim 1, It is characterized in that The lower end of the tube shell is flush with the lower end of the plug.

5. The impact piece detonator based on the shaped bridge foil according to claim 1, It is characterized in that The pin is a Cu pin or a conductor pin with a surface covered with Cu, Au or Ag, or a semiconductor pin with a surface covered with Cu, Au or Ag; the plug is an Al 2 O 3 Ceramic stopper.

6. The impact piece detonator based on the shaped bridge foil according to claim 3, It is characterized in that The back plate is one of a ceramic back plate, a quartz glass back plate, and a plexiglass back plate; the energy-gathering bridge foil is one of an Au bridge foil, an Ag bridge foil, a Cu bridge foil, an Al bridge foil, and a Ni bridge foil; the taper of the energy-gathering bridge area is between 30° and 60°, and the thickness is between 2μm and 6μm.

7. The impact piece detonator based on the shaped bridge foil according to claim 1, It is characterized in that The flying sheet layer is one of polyimide flying sheets and polychloroparaxylene flying sheets; the accelerating chamber is one of stainless steel accelerating chamber, sapphire accelerating chamber and polyimide accelerating chamber; the medicine ring is a stainless steel medicine ring; and the tube shell is a stainless steel tube shell.

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