Forest fire extinguishing bomb

Abstract

A forest fire extinguishing bomb is characterized in to include a bullet head and a folding tail wing, the bullet head is provided with a fire extinguishing agent bin, the fire extinguishing agent bin is provided with a methane compressed gas bin, the folding tail wing is provided with a cavity in the center, the fire extinguishing agent bin and the cavity are communicated through a range gas filling pipe, the methane compressed gas bin is provided with a one-way valve at the communication position of the range gas filling pipe, the cavity is provided with a one-way sealing ring at the communication position of the range gas filling pipe, the bullet head is provided with an electronic fuse at the front end, the ignition end of the electronic fuse is located in the methane compressed gas bin, the folding tail wing is provided with a range ignition fuse, a gas filling port and a sealing ring at the tail end, the range ignition fuse extends into the range gas filling pipe through an ignition lead, and the gas filling port is communicated with the cavity. The present application has the advantages of simple structure, convenient fuel filling, high safety factor, long range, and recyclable tail wing.

Description

Technical Field

[0001] This invention relates to the field of rocket design, specifically to a fire extinguishing projectile for forest firefighting. Background Technology

[0002] In fires, forest fires and high-rise building fires often cause enormous damage and threats to the natural environment, human survival, and property safety. Due to the high temperatures near the fire, firefighters and high-pressure water cannons have difficulty reaching the fire's epicenter, making timely and effective firefighting impossible. Furthermore, for forest fires, the large fire area makes it impossible to quickly extinguish the fire within a single area. For high-rise building fires, the complex fire scene environment makes it difficult for firefighters and extinguishing agents to reach the site due to the height of the building, and the personal safety of firefighters is often threatened during the firefighting process.

[0003] Patent 201220695056.X, entitled "A Forest Fire Extinguishing Rocket," describes a fire extinguishing rocket primarily composed of a fuse, a fire extinguishing device, a rocket body structure, a solid rocket motor, and tail fins. The fuse mainly consists of a height-fixing fuse circuit board, a timing fuse circuit board, and a power supply. The fire extinguishing device connects to the solid rocket motor via an adapter, which is fitted with an airflow shaping cover. The tail fins are fixed to the tail of the solid rocket motor. The rocket body casing is sealed at both ends and the central tube using front and rear caps, forming the extinguishing agent volume. Multiple tie rods are installed between the front and rear caps. Propellant is installed inside the central tube. The filling hole on the front cap is sealed with a filling screw cap. Wires pass through the hollow tie rods and are electrically connected to the rocket motor. Because solid rocket motors are pyrotechnic devices, they pose flammable and explosive hazards. Using a solid rocket motor as the power unit results in risks during storage, transportation, and use of the fire extinguishing rocket. Furthermore, the high price of solid propellant leads to the high cost of this fire extinguishing rocket. Furthermore, the use of explosive tubes to generate high-pressure gas to rupture the shell and release the extinguishing agent results in poor stability of the explosive tubes in the blasting device, leading to poor safety during the storage, transportation, and use of the fire extinguishing rocket. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and provide a forest fire extinguishing bomb with a simple structure, convenient fuel filling, high safety factor, long range, and recoverable tail fins.

[0005] To achieve the above objectives, the technical solution of the present invention is: a fire extinguishing bomb for forest fire fighting, characterized in that: it includes a warhead and a folding tail fin, the warhead is provided with a fire extinguishing agent chamber, the fire extinguishing agent chamber is provided with a methane compressed gas chamber, the folding tail fin is provided with a cavity at its center, the fire extinguishing agent chamber and the cavity are connected by a range extender gas filling pipe, a one-way valve is provided at the connection between the methane compressed gas chamber and the range extender gas filling pipe, and a one-way sealing ring is provided at the connection between the cavity and the range extender gas filling pipe; The warhead is equipped with an electronic fuse at its front end, and the ignition end of the electronic fuse is located inside the methane compression chamber. The tail end of the folding tail fin is provided with a range-extending ignition fuse, a gas filling port and a sealing ring. The range-extending ignition fuse extends into the range-extending gas filling tube through an ignition lead, and the gas filling port is connected to the cavity.

[0006] The range-extending gas filling tube is connected to the warhead with a tail fin release sleeve.

[0007] A locking groove is fitted onto the range extender gas filling tube at the rear end of the tail fin after it detaches from the sleeve.

[0008] The tail fin release sleeve has a three-lobed structure, with each lobe connected by rubber screws.

[0009] The range extender gas filling tube is fitted with a folding tail fin locking sleeve on the tube body located inside the cavity for opening the folding tail fin.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses compressed methane air as the propellant for the warhead explosion and the range extension fuel for the fire extinguishing projectile. Compressed methane air is lightweight, has high combustion efficiency, is not easily explosive, and has a high safety factor. Due to the presence of a one-way valve and a one-way sealing ring, the operator can replenish the fire extinguishing projectile with compressed methane air while filling the gun barrel, making fuel filling more convenient. The addition of the range extension gas filling pipe makes the fire extinguishing projectile have a longer range, greatly improving the safety of fire extinguishing.

[0011] 2. The present invention uses a tail fin release sleeve at the connection between the range-extending gas filling tube and the warhead. This allows the tail fin to detach before the warhead explodes, so that the tail fin can be recovered, improving the reusability of the components and reducing the cost of use.

[0012] 3. The folding tail fin locking sleeve in this invention is used to open the tail fin during the flight of the fire extinguishing projectile, thereby increasing the stability of the fire extinguishing projectile.

[0013] 4. The present invention has a locking groove fitted on the range-extending gas filling tube, which cooperates with the locking cylinder on the gun barrel to ensure the stability of the fire extinguishing bomb during transportation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 (Main section view).

[0015] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 (Side view).

[0016] Figure 3 This is a schematic diagram of the structure in this invention where the tail fin detaches from the sleeve.

[0017] Figure 4 This is a schematic diagram of the installation of the present invention in the gun barrel.

[0018] In the diagram: 1. Warhead; 2. Folding tail fin; 3. Extinguishing agent chamber; 4. Methane compressed gas chamber; 5. Cavity; 6. Extender gas filling pipe; 7. One-way valve; 8. One-way sealing ring; 9. Electronic fuse; 10. Extender ignition fuse; 11. Gas filling port; 12. Sealing ring; 13. Ignition lead; 14. Tail fin release sleeve; 15. Locking groove; 16. Folding tail fin locking sleeve; 17. Gun barrel; 18. Gun bore; 19. Locking cylinder; 20. Chamber pressure sensor; 21. Ignition port; 22. Gas filling port. Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] See Figures 1-3 A forest fire extinguishing grenade includes a warhead 1 and a folding tail fin 2. The warhead 1 is provided with a fire extinguishing agent chamber 3, and a methane compressed gas chamber 4 is provided inside the fire extinguishing agent chamber 3. An electronic fuse 9 is installed at the front end of the warhead 1, and the ignition end of the electronic fuse 9 is located inside the methane compressed gas chamber 4. A cavity 5 is provided in the center of the folding tail fin 2. The fire extinguishing agent chamber 3 and the cavity 5 are connected by a range extender gas filling pipe 6. The end of the range extender gas filling pipe 6 located inside the cavity 5 is fitted with a folding tail fin locking sleeve 16 for opening the folding tail fin 2. A one-way valve 7 is provided at the connection between the methane compressed gas chamber 4 and the range extender gas filling pipe 6. A one-way sealing ring 8 is provided at the connection between the cavity 5 and the range extender gas filling pipe 6.

[0021] The tail end of the folding tail fin 2 is provided with an extended range ignition fuse 10, a gas filling port 11 and a sealing ring 12. The sealing ring 12 is used to seal the contact point between the folding tail fin 2 and the gun barrel 18. The extended range ignition fuse 10 extends into the extended range gas filling tube 6 through the ignition lead wire 13. The gas filling port 11 is connected to the cavity 5.

[0022] The range-extending gas filling tube 6 is connected to the warhead 1 with a tail fin release sleeve 14. The range-extending gas filling tube 6 at the rear end of the tail fin release sleeve 14 is fitted with a locking groove 15. The tail fin release sleeve 14 has a three-lobed structure, and each lobe is connected by a rubber screw.

[0023] During loading, the fire extinguishing shell is simply inserted into the breech 18 through the muzzle, and then the locking cylinder 19 controls the locking tongue to extend into the locking groove 15 to lock the fire extinguishing shell. See the schematic diagram of the fire extinguishing shell installation in the breech. Figure 4 .

[0024] Before engaging in forest firefighting, the range, azimuth, and chamber pressure of the transmitter are calculated based on drone detection and satellite positioning systems. Methane compressed air is then introduced into the chamber 18 through the air inlet 22. During the inflation process, the methane compressed air enters the range-extending gas filling pipe 6 through the gas filling port 11 at the tail of the fire extinguishing projectile and then into the methane compressed gas chamber 4. A one-way valve 7 is installed between the methane compressed gas chamber 4 and the range-extending gas filling pipe 6. The methane compressed air stored in the methane compressed gas chamber 4 serves as the power source for the explosive warhead 1. The range-extending gas filling pipe 6 is also filled with methane compressed air. At this time, the one-way sealing ring 8 at the tail of the projectile ensures that there is no leakage of high-pressure gas.

[0025] Upon firing, the high-pressure methane air in the gun barrel 18 is ignited through the ignition port 21, simultaneously igniting the range-extending ignition fuse 10. After ignition, the chamber pressure sensor 20 reads the pressure in the gun barrel 18. Once the set chamber pressure is reached, the locking cylinder 19 unlocks, the locking tongue disengages from the locking groove 15, and the fire extinguishing projectile flies out of the gun barrel 17. After the projectile has flown a certain distance, the range-extending ignition fuse 10 ignites the compressed methane air in the range-extending gas filling pipe 6, triggering a deflagration. The deflagration gas pushes the folding tail fin locking sleeve 16 backward, causing the folding tail fin 2 to open backward, increasing the stability of the fire extinguishing projectile's flight. Simultaneously, the deflagration gas is exhausted backward, opening the rubber one-way sealing ring 8, and the fire extinguishing projectile's range is extended through the exhaust.

[0026] The electronic fuse 9, mounted at the front of the warhead 1, is set to a detonation height before launch. Different extinguishing agents can be set to different detonation heights to achieve the best fire extinguishing effect. The fire extinguishing projectile flies over the target and falls downwards. The electronic fuse radar measures the distance to the ground. Upon reaching the target distance, it ignites the high-pressure air inside the methane compressed gas chamber 4. The methane compressed gas chamber 4 is a composite material pipe. After detonation, it ruptures the rubber warhead 1, and the fire extinguishing agent chamber inside the projectile is dispersed over the target. It should be noted that during flight, the electronic fuse 9 undergoes a secondary detonation. The first detonation occurs when the tail fins detach from the sleeve 14, causing the rubber screws connecting the three segments to fail and the folding tail fins detach. The second detonation occurs inside the warhead 1 to extinguish the fire. To achieve this secondary detonation, a time-delay relay can be installed inside the electronic fuse 9.

[0027] After the rubber bullet 1 explodes, the folding tail fin 2 no longer dives downwards but undergoes irregular deceleration. The folding tail fin 2 is made entirely of lightweight aluminum alloy and is recyclable. If the electronic fuse 9 fails to detonate the bullet 1, the rubber bullet 1 will rupture upon impact, and the composite material tubing of the methane compressed gas chamber 4 will also leak due to compression. Because the methane compressed gas chamber 4 is enclosed by the extinguishing agent chamber 3, the leakage of methane compressed gas will not cause a deflagration. At this point, the bullet 1 loses the possibility of exploding and can be safely recovered.

Claims

1. A fire extinguishing bomb for forest firefighting, characterized in that: The device includes a warhead (1) and a folding tail fin (2). The warhead (1) is equipped with a fire extinguishing agent chamber (3). The fire extinguishing agent chamber (3) is equipped with a methane compressed gas chamber (4). The folding tail fin (2) has a cavity (5) in the center. The fire extinguishing agent chamber (3) and the cavity (5) are connected by a range extender gas filling pipe (6). A one-way valve (7) is provided at the connection between the methane compressed gas chamber (4) and the range extender gas filling pipe (6). A one-way sealing ring (8) is provided at the connection between the cavity (5) and the range extender gas filling pipe (6). The front end of the warhead (1) is equipped with an electronic fuse (9), and the ignition end of the electronic fuse (9) is located inside the methane compression chamber (4); The tail end of the folding tail fin (2) is provided with an extended range ignition fuse (10), a gas filling port (11) and a sealing ring (12). The extended range ignition fuse (10) extends into the extended range gas filling tube (6) through an ignition lead (13). The gas filling port (11) is connected to the cavity (5). The range extender gas filling tube (6) is fitted with a folding tail wing lock sleeve (16) for opening the folding tail wing (2) on the tube body inside the cavity (5).

2. The forest fire extinguishing bomb according to claim 1, characterized in that: The range-extending gas filling tube (6) is connected to the warhead (1) by a tail fin release sleeve (14).

3. A forest fire extinguishing bomb according to claim 2, characterized in that: A locking groove (15) is fitted onto the range extender gas filling tube (6) at the rear end of the tail fin release sleeve (14).

4. A forest fire extinguishing bomb according to claim 2, characterized in that: The tail fin release sleeve (14) has a three-lobed structure, with each lobe connected by a rubber screw.

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