Portable energy-gathering perforation vehicle interceptor

Abstract

The invention discloses a portable energy-gathered perforation vehicle interceptor which is detachably mounted on a vehicle tire. The vehicle interceptor comprises a shell. The shell comprises a base fixed to a tire and a protruding part which is integrally formed with the base and extends in the side direction away from the tire. A detonating mechanism mounting area is arranged in the base, and an energy-gathered explosive mounting area is arranged in the protruding part. A detonating mechanism is mounted in the detonating mechanism mounting area, and comprises a safety bolt extending out of the shell, a firing pin fixed in position after the safety bolt is inserted, a needling fire cap capable of exploding under the impact of the firing pin, and a spring for limiting the impact of the firing pin to the needling fire cap side; when the safety bolt is pulled out and the automobile tire rotates rapidly, the firing pin overcomes the elastic force of the spring under the action of centrifugal force and collides with the needling fire cap, the needling fire cap detonates the energy-gathered explosive in the energy-gathered explosive mounting area after being detonated and subjected to multi-stage explosion propagation, and then the energy-gathered explosive in the energy-gathered explosive mounting area is detonated. Explosion energy of the energy-gathered explosives drives the shaped charge cover below the energy-gathered explosives to form linear energy-gathered jet flow to penetrate through the tires.

Description

Technical Field

[0001] The present invention relates to a portable energy - concentrating perforating vehicle interceptor. Background Art

[0002] When the police conduct public security control and crack down on criminal activities, they often need to set up checkpoints at traffic arteries or important locations to intercept and inspect passing vehicles. Currently, common vehicle interception methods mainly include: rigid interception devices (including police interception belts, tire obstacles, fixed interception facilities, etc.), police puncture belts (high - density metal nails), and electronic interception technologies (using radio interference technology or controlling the driving system of the vehicle through electronic signals to force the vehicle to stop automatically). Although the above - mentioned traditional vehicle interception technologies have played a role to a certain extent, there are still some deficiencies, mainly manifested in: complex operation and poor flexibility, relatively high danger, low interception success rate, and risk exposure of law enforcement officers. Moreover, there is even a situation where the suspected vehicle rams the checkpoint again after stopping, thus unable to meet the increasingly complex security prevention needs. Summary of the Invention

[0003] Object of the Invention: The object of the present invention is to provide a portable energy - concentrating perforating vehicle interceptor, which can quickly intercept the ramming vehicle and is convenient to operate.

[0004] Content of the Invention: The portable energy - concentrating perforating vehicle interceptor of the present invention is detachably installed on the vehicle tire; the vehicle interceptor includes a housing, the housing includes a base fixed on the tire and a convex portion integrally formed with the base and extending in the direction away from the tire side; an initiating mechanism installation area is provided in the base, and an energy - concentrating explosive installation area is provided in the convex portion; an initiating mechanism is installed in the initiating mechanism installation area, the initiating mechanism includes a safety pin protruding from the housing, a firing pin fixed in position after the safety pin is inserted, a stab fire cap that will explode under the impact of the firing pin, and a spring for limiting the impact of the firing pin towards the stab fire cap side; when the safety pin is removed and the vehicle tire rotates rapidly, the firing pin overcomes the spring force under the action of centrifugal force and hits the stab fire cap. After the stab fire cap detonates, it passes through multiple stages of detonation and then detonates the energy - concentrating explosive in the energy - concentrating explosive installation area. The explosion energy of the energy - concentrating explosive drives the liner in the lower part of the energy - concentrating explosive to form a linear shaped charge jet to penetrate the tire.

[0005] Among them, to improve the reliability of initiation, the initiating mechanisms in the base are symmetrically arranged on both sides of the energy - concentrating explosive, so the housing is in a T - shape.

[0006] Among them, the multi-stage detonation mechanism includes a detonating cord and a detonator. After the stab fire cap detonates, it detonates the detonating cord. After the detonating cord detonates, it detonates the detonator. After the detonator detonates, it detonates the shaped charge. The detonation velocity of the stab fire cap is the smallest, the detonation velocity of the detonating cord is the second, the detonation velocity of the detonator is the third, and the detonation velocity of the shaped charge is the largest, thus ensuring normal detonation transfer. The detonating cord is also arranged in a T shape, and the stab fire cap and the detonator are connected by the detonating cord. The detonator uses TNT explosive, and the filling amount is 1.5 - 2.5 g; the shaped charge in the shaped charge installation area uses JH-2 explosive, and the filling amount of the shaped charge is not higher than 20 g; the detonating cord is filled with ammonium nitrate explosive inside, the filling density is 25 - 35 g / m, and the total filling amount is 3 - 4.5 g (calculated according to the detonating cord length of 100 - 150 mm).

[0007] Among them, the detonating cord is arranged outside the shell, and the detonating cord and the shell are arranged axially parallel, and the distance between them is 0.5 - 3 mm. Through the external detonating cord, the present invention can effectively overcome the internal space constraint of the shell, make the interceptor small in volume and high in integration degree, and can also avoid the instability of the jet direction caused by insufficient wall thickness of the shell, that is, it can ensure the accuracy of the jet direction even after the shell thickness is greatly reduced, and can also reduce the material redundancy due to the reduction of the shell thickness. The shell thickness of the present invention is reduced to 30% - 50% of the traditional design. Compared with the need to additionally install a support frame to maintain the stability and safety of the structure when the detonating cord is installed inside, the present invention can effectively reduce the deviation of the jet forming direction by arranging the detonating cord outside and arranging it axially parallel to the shell (the distance is controlled within the range of 0.5 - 3 mm), and cooperate with the preset groove in the shell (the shaped charge is placed in the groove), and can avoid the reflection interference of the explosion shock wave in the inner cavity of the shell by arranging the detonating cord outside, so as to effectively improve the velocity of the metal jet head.

[0008] Among them, the liner is an oxygen-free copper liner, with a thickness of 0.5 mm and a length of 90 mm, and the cone angle θ of the liner is 90 degrees.

[0009] Among them, the vehicle interceptor is fixed on the vehicle tire through an adhesive, and the adhesive is acrylic resin or epoxy resin, and the thickness of the formed adhesive layer is 0.5 - 1.5 mm.

[0010] Among them, the safety pin and the firing pin are made of high-strength alloy steel.

[0011] Among them, the elastic force of the spring is greater than 2 times the gravity of the firing pin (to ensure that after the safety pin is pulled out, the stab fire cap will not be detonated under the action of the gravity of the firing pin. Generally, the maximum elastic force of the spring is three times the gravity of the firing pin), and the elastic force of the spring is less than the difference between the centrifugal force received by the firing pin and the acting force of detonating the stab fire cap when the vehicle speed is 60 km / h, so as to realize that the firing pin impacts and detonates the stab fire cap under the action of centrifugal force when the vehicle speed is 60 km / h.

[0012] The length of the spring is greater than that of the firing pin and the hammer, so that there is a certain distance between the firing pin and the stab-fire cap when not triggered, and there is enough travel when triggered to trigger the stab-fire cap. The stab-fire cap is placed at one end of the firing pin travel and connected to the detonating cord, and the other end of the detonating cord is connected to the detonator. The detonator is placed between the top of the explosion-proof housing and the shaped charge to detonate the shaped charge. When the police are conducting vehicle inspection work, the interceptor can be fixed on the vehicle tire in a specific direction, and the safety pin is pulled out. If the vehicle under inspection attempts to ram through the checkpoint after slowing down, due to the instantaneously increased moment of inertia, the firing pin will be instantaneously accelerated, hitting the stab-fire cap, and then detonating the detonator through the detonating cord, thus detonating the shaped charge to form a linear jet to penetrate the tire.

[0013] The housing of the vehicle interceptor of the present invention is made of lightweight and fragile plastic or carbon fiber reinforced plastic, such as acrylic plate, to ensure that the fragments formed under the driving force of the explosion are small and the kinetic energy is small, thereby reducing collateral damage. The size of the housing is 100 mm in length, 100 mm in width, and 100 mm in height, and the thickness of the housing is 5 mm. The shaped charge in the shaped charge installation area uses JH-2 explosive, and the loading amount of the shaped charge is not higher than 20 g.

[0014] The control of the charge amount is completed by the following calculation:

[0015] Parameters of JH-2 explosive:

[0016] Explosion heat Q 爆热 = 5.2 MJ / kg

[0017] Density ρ 装药 = 1.75 g / cm 3

[0018] Charge amount m 装药 = 20 g

[0019] Calculation of explosion energy:

[0020] E 爆破 = m 装药 ×Q 爆热 = 0.02 kg × 5.2 MJ / kg = 104 kJ. The charge amount of the main charge corresponding to the present invention can meet the requirement that the energy generated by the shaped jet can effectively penetrate the tire and the perforation size is appropriate, so that the target vehicle loses the ability to ram through the checkpoint due to the rapid loss of tire pressure, and at the same time can avoid excessive damage or causing casualties.

[0021] The relationship between the cone angle of the liner and the jet performance is as follows:

[0022] Cone angle θ = 90°

[0023] Jet velocity (Birkhoff theory):

[0024]

[0025] D = 8,200 m / s (detonation velocity of JH-2)

[0026] ρliner = 8.96 g / cm 3 (density of electrolytic copper)

[0027] ρcharge = 1.75 g / cm 3 Substituting gives:

[0028] vjet ≈ 6,600 m / s

[0029] Formula for penetration depth (Munroe effect):

[0030]

[0031] Calculating gives P = 228 mm

[0032] In the case where the stand-off distance is determined during the application of the device of the present invention (the stand-off distance is the vertical height from the vertex position of the liner cone angle to the contact surface between the device and the tire, and this space is a hollow structure), the penetration depth P is much greater than the tire thickness (15 - 25 mm), so as to ensure that the linear shaped charge jet formed by the explosion energy of the shaped charge can instantaneously penetrate the tire.

[0033] The time from when the vehicle starts to when the jet penetrates the tire for the device of the present invention is:

[0034] Time required for the vehicle to accelerate to 60 km / h:

[0035] v = 60 km / h ≈ 16.67 m / s

[0036] Assuming the acceleration of an ordinary vehicle during emergency acceleration is 3 m / s 2 , calculating the acceleration time:

[0037]

[0038] The detonation transfer time after triggering is the sum of the detonation times required for each component:

[0039]

[0040] Jet penetration time:

[0041]

[0042] The total time required is:

[0043] t 总 = t 加速 + t 传爆 + t 侵彻 ≈ 5.56 s + 30.94 μs.

[0044] When the vehicle speed is 60 km / h, the tire rotation speed ω is about 55.6 rad / s, and the centrifugal force generated at this time is:

[0045] F 离心 = m·ω 2 ·r = 0.01 ker × (55.6) 2 × 0.1 m ≈ 30.9 N;

[0046] The triggering threshold of a conventional stab-fire cap is 200 - 500 MPa. Using the formula

[0047]

[0048] And the contact area of the firing pin is set to 0.04 mm 2 , it is calculated that the minimum pressure F required to trigger the fire cap is 20 N. When the impact force reaches 20 N, the fire cap triggering condition can be achieved.

[0049] Beneficial effects: Compared with the prior art, the present invention has the following remarkable advantages: The portable shaped charge perforation interceptor of the present invention is connected to the vehicle tire through an adhesive. After it is adhered to the vehicle tire, the pin is pulled out. If a suspicious vehicle breaks through the checkpoint, driving the wheel tire to rotate at high speed, the shaped charge inside the interceptor can be automatically activated to form a high-speed shaped charge jet to instantly penetrate the tire, so that the vehicle can be immediately braked, achieving the effect of efficient interception; The interceptor of the present invention has the characteristics of rapid deployment, simple operation, automatic and efficient interception. Brief Description of the Drawings

[0050] Figure 1 is the front view of the portable shaped charge perforation interceptor of the present invention;

[0051] Figure 2 is the right view of the portable shaped charge perforation interceptor of the present invention;

[0052] Figure 3 is the top view of the portable shaped charge perforation interceptor of the present invention;

[0053] Figure 4 is the A - A sectional view of the portable shaped charge perforation interceptor of the present invention;

[0054] Figure 5 is the B - B sectional view of the portable shaped charge perforation interceptor of the present invention;

[0055] Figure 6 is the C - C sectional view of the portable shaped charge perforation interceptor of the present invention;

[0056] Figure 7 is the schematic diagram of the portable shaped charge perforation interceptor of the present invention installed on the vehicle tire. Detailed implementation mode

[0057] As shown Figures 1 to 7 in the figure, the portable energy - concentrating perforating vehicle interceptor of the present invention is used for detachably installing on a vehicle tire; the vehicle interceptor includes a housing 1, and the housing 1 includes a base 1 - 1 fixed on the tire and a convex portion 1 - 2 integrally formed with the base 1 - 1 and extending in the direction away from the tire side; a detonating mechanism installation area is provided in the base 1 - 1, and an energy - concentrating explosive installation area is provided in the convex portion 1 - 2; a detonating mechanism is installed in the detonating mechanism installation area, and the detonating mechanism includes a safety pin 12 extending out of the housing 1, a firing pin 13 fixed in position after the safety pin 12 is inserted, a stab fire cap 10 that will explode under the impact of the firing pin 13, and a spring 14 for limiting the impact of the firing pin 13 towards the stab fire cap side; when the safety pin 12 is removed and the vehicle tire rotates rapidly (the vehicle speed is 60 km / h), the firing pin 13 overcomes the elastic force of the spring 14 under the action of centrifugal force and hits the stab fire cap 10. After the stab fire cap 10 detonates, through multiple - stage detonation, the energy - concentrating explosive 4 in the energy - concentrating explosive installation area is detonated. The explosion energy of the energy - concentrating explosive 4 drives the liner 5 below the energy - concentrating explosive 4 to form a linear shaped charge jet to penetrate the tire 15, causing the tire 15 to burst, thereby disabling the vehicle's mobility.

[0058] After the safety pin 12 of the portable energy - concentrating perforating interceptor of the present invention is removed, if the vehicle has not started, the safety pin 12 can be inserted back, and the interceptor can be removed from the vehicle tire. The recovered interceptor can be put into use again later.

[0059] To improve the reliability of detonation, the detonating mechanisms in the base 1 - 1 of the interceptor are symmetrically arranged on both sides of the energy - concentrating explosive 4. Therefore, the housing 1 is in a T - shape. The housing 1 is made of lightweight and fragile plastic or carbon fiber - reinforced plastic, such as acrylic board, to ensure that the fragments formed by the housing 1 under the driving force of the explosion are smaller and have less kinetic energy, thereby reducing collateral damage. The size of the housing 1 is 100 mm in length, 100 mm in width, and 100 mm in height, and the thickness of the housing 1 is 5 mm. Since the interceptor is small in size and high in integration, it is convenient to operate and carry and can be quickly deployed. In addition, the structure of the present invention can ensure the accuracy of the shaped charge jet forming direction with a housing thickness of 5 mm.

[0060] The vehicle interceptor of the present invention is connected to the rubber tire 15 through an adhesive. When connecting, the symmetry plane of the interceptor coincides with the radius of the circular tire, and the connection end of the firing pin 13 and the safety pin 12 on the interceptor is close to the center side of the tire 15, while the pointed end of the firing pin 13 points to the side away from the center of the tire 15.

[0061] Among them, the multi-stage detonation mechanism includes a detonating cord 8 and a detonator 3. The stab-fire cap 10 is connected to the detonator 3 through the detonating cord 8. The detonator 3 is installed on the side of the shaped charge 4 away from the liner 5. After the stab-fire cap 10 detonates, it detonates the detonating cord 8. After the detonating cord 8 detonates, it detonates the detonator 3. After the detonator 3 detonates, it detonates the shaped charge 4. The detonation velocity of the stab-fire cap is the smallest, the detonation velocity of the detonating cord is the second, the detonation velocity of the detonator is the third, and the detonation velocity of the shaped charge is the largest, thus ensuring normal detonation transfer. The TNT explosive 2 is filled in the detonator 3, and the filling amount of the TNT explosive 2 is 1.5 - 2.5 g. The shaped charge 4 in the shaped charge installation area uses JH-2 explosive, and the filling amount of the shaped charge 4 is not higher than 20 g. The detonating cord 8 is filled with ammonium nitrate explosive inside, the filling density is 25 - 35 g / m, and the total filling amount is 3 - 4.5 g (calculated according to the detonating cord length of 100 - 150 mm).

[0062] After the interceptor of the present invention is installed on the vehicle tire, the safety pin 12 is removed. When the vehicle tire starts and reaches a certain rotational speed, the firing pin 13 will hit the stab-fire cap under the action of centrifugal force, overcoming the elastic force of the spring 14, and detonating the stab-fire cap explosive. Furthermore, the stab-fire cap detonates the detonating cord explosive. Then, the detonating cord explosive detonates the detonator explosive. Finally, the detonator explosive detonates the shaped charge, driving the linear liner 5 to form a linear shaped charge jet. The linear shaped charge jet penetrates the tire, causing the tire to burst, thereby disabling the vehicle's mobility. If the vehicle does not start after the safety pin 12 is removed, the safety pin 12 can be inserted back, and the entire interceptor can be recovered and reused after recovery.

[0063] As Figure 3 shown, for the convenience of the carrying personnel to install quickly, an arrow as shown can be marked on the top of the actual interceptor. The direction of the arrow coincides with the tire radius, and the arrow end points to the side of the tire away from the center of the circle. The specific installation schematic diagram is as Figure 7 shown. The structure of the present invention is simple, and the installation and disassembly are convenient. Compared with the traditional vehicle deceleration and forced stop equipment and flexible vehicle blocking equipment, the vehicle interceptor of the present invention is easy to carry and install conveniently, and can stably trigger to disable the suspect vehicle's ability to ram through the checkpoint.

[0064] By selecting an explosion-proof housing with specific dimensions and specific structure in cooperation with a liner with specific material and specific cone angle, under the filling amount of the corresponding shaped charge, the present invention can not only ensure that the linear shaped charge jet effectively and quickly penetrates the tire and the perforation size is appropriate, enabling the target vehicle to lose the ability to ram through the checkpoint due to the rapid loss of tire pressure, but also avoid excessive damage (such as damaging the wheel rim or causing explosion shock wave hazards).

Claims

1. A portable energy - concentrating perforating vehicle interceptor, characterized in that: The vehicle interceptor can be detachably installed on the vehicle tire; the vehicle interceptor includes a housing (1), the housing (1) includes a base (1-1) fixed on the tire and a convex portion (1-2) integrally formed with the base (1-1) and extending in the direction away from the tire side; an initiating mechanism installation area is provided in the base (1-1), and a shaped charge installation area is provided in the convex portion (1-2); an initiating mechanism is installed with an initiating mechanism, and the initiating mechanism installation area includes a safety pin (12) extending out of the housing (1), a firing pin (13) fixed in position after the safety pin (12) is inserted, a stab fire cap that will explode when struck by the firing pin (13), and a spring (14) for limiting the impact of the firing pin (13) towards the stab fire cap side; when the safety pin (12) is removed and the vehicle tire rotates rapidly, the firing pin (13) strikes the stab fire cap under the action of centrifugal force, overcoming the elastic force of the spring (14). After the stab fire cap detonates, it undergoes multi-stage detonation and then detonates the shaped charge (4) in the shaped charge installation area. The explosion energy of the shaped charge (4) drives the liner (5) below the shaped charge (4) to form a linear shaped charge jet to penetrate the tire.

2. The portable energy-accumulating perforating vehicle interceptor according to claim 1, wherein: The initiating mechanisms in the base (1-1) are symmetrically arranged on both sides of the shaped charge (4).

3. The portable energy-accumulating perforating vehicle interceptor according to claim 1, wherein: The multi-stage detonation mechanism includes a detonating cord (8) and a detonator (3); the stab fire cap (10) is connected to the detonator (3) through the detonating cord (8); the detonator (3) is installed on the side of the shaped charge (4) away from the liner (5); after the stab fire cap (10) detonates, it detonates the detonating cord (8), after the detonating cord (8) detonates, it detonates the detonator (3), and after the detonator (3) detonates, it detonates the shaped charge (4).

4. The portable energy-accumulating perforating vehicle interceptor according to claim 1, wherein: The detonating cord (8) is arranged outside the housing (1), and the detonating cord (8) is arranged axially parallel to the housing (1), and the distance formed between the two is 0.5 - 3 mm.

5. The portable energy-accumulating perforating vehicle interceptor according to claim 1, wherein: The liner (5) is a liner made of oxygen-free copper, and the cone angle of the liner is 90 degrees.

6. The portable energy-accumulating perforating vehicle interceptor according to claim 1, wherein: The vehicle interceptor is fixed on the vehicle tire through an adhesive, and the adhesive is acrylic resin or epoxy resin, and the thickness of the formed adhesive layer (9) is 0.5 - 1.5 mm.

7. The portable energy - concentrating perforating vehicle interceptor according to claim 1, wherein: The safety pin (12) and the firing pin (13) are made of high-strength alloy steel.

8. The portable energy-accumulating perforating vehicle interceptor according to claim 1, wherein: The elastic force of the spring (14) is greater than twice the gravity of the firing pin (13), and the elastic force of the spring (14) is less than the difference between the centrifugal force received by the firing pin when the vehicle speed is 60 km / h and the acting force of detonating the stab fire cap (10), so as to achieve that when the vehicle speed is 60 km / h, the firing pin strikes and detonates the stab fire cap (10) under the action of centrifugal force.

9. The portable energy-accumulating perforating vehicle interceptor according to claim 1, wherein: The size of the housing (1) is 100 mm in length, 100 mm in width, and 100 mm in height, the thickness of the housing (1) is 5 mm, the shaped charge (4) in the shaped charge installation area uses JH-2 explosive, and the filling amount of the shaped charge (4) is not higher than 20 g.

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