Fire extinguishing bomb for unmanned aerial vehicle

Abstract

The utility model discloses a fire extinguishing bomb for an unmanned aerial vehicle. The fire extinguishing bomb comprises a bomb body, a cavity, a detonator, an ignition mechanism and a fire extinguishing agent, an insertion groove is formed in the tail part of the projectile body, and a suspension mechanism is arranged in the insertion groove; the suspension mechanism comprises a mounting seat, a fixing column is fixedly connected to the lower end of the mounting seat, and a plurality of first connecting rods and second connecting rods are rotationally connected to the side part of the fixing column; the outer ends of the first connecting rod and the second connecting rod on the same vertical face are jointly and rotationally connected with an L-shaped supporting plate. An air cylinder is arranged in the mounting base, the output end of the air cylinder penetrates through the fixed column to be connected with a first moving column, the side portion of the first moving column is rotationally connected with a plurality of third connecting rods, and the third connecting rods are rotationally connected with the L-shaped supporting plates on the same vertical face; and a plurality of vertical grooves are formed in the side part of the insertion groove. The unmanned aerial vehicle can reduce shaking in the flying process, has the advantage of being stable, and can increase the throwing accuracy.

Description

Technical Field

[0001] This utility model relates to a fire extinguishing bomb for unmanned aerial vehicles (UAVs), belonging to the field of fire extinguishing bomb technology. Background Technology

[0002] Fire extinguishing bombs are fire-fighting equipment capable of rapid fire suppression. They primarily work by rapidly releasing and dispersing an internal extinguishing agent into the fire area through explosion or other means. The extinguishing agent covers the surface of the burning material, isolating oxygen, cooling the area, or chemically inhibiting the combustion reaction. In some emergency scenarios, fire rescue vehicles cannot access the area, or the water pressure in fire hoses cannot reach the roof of high-rise buildings, making firefighting difficult. Therefore, drones are often used to drop fire extinguishing bombs for fire suppression. For example, Chinese utility model patent CN219001816U discloses a suspended fire extinguishing grenade system for firefighting drones. Specifically, it discloses a fire extinguishing grenade, an electronic fuse connected to a circuit formed by the positive and negative terminals of a battery, two elastic conductive sheets installed in the circuit, an insulating sheet inserted between the two conductive sheets, a pull ring fixedly connected to the insulating sheet, a pull rope connected to the pull ring, the upper end of the pull rope fixed to the drone frame, a hanging ring fixedly connected to the fire extinguishing grenade, a U-shaped block with its opening facing downwards fixedly installed on the frame, a guide hole on one side of the U-shaped block, a suspension rod slidably installed in the guide hole, a connecting rod hinged to the outer end of the suspension rod, the other end of the connecting rod hinged to a rotating arm, and the rotating arm fixedly connected to the output shaft of a servo motor. This solution, by having the suspension rod pass through the hanging ring to mount the fire extinguishing grenade on the drone, is prone to the fire extinguishing grenade swaying with the wind during drone flight, affecting the drone's flight stability and reducing the accuracy of deployment. Utility Model Content

[0003] The purpose of this invention is to provide a fire extinguishing projectile for unmanned aerial vehicles (UAVs). This invention can reduce shaking during flight, has the advantage of stability, and can increase the accuracy of deployment.

[0004] The technical solution of this utility model is as follows: A fire extinguishing projectile for unmanned aerial vehicles (UAVs) includes a projectile body with a cavity inside. A detonator is placed in the center of the cavity, and an ignition mechanism is placed above the detonator. The cavity is filled with a fire extinguishing agent. The tail of the projectile body has an insertion groove, and a suspension mechanism is provided in the insertion groove. The suspension mechanism includes a mounting base, a fixed column is fixedly connected to the lower end of the mounting base, and multiple first connecting rods and second connecting rods are rotatably connected to the side of the fixed column. The first connecting rods are located above the second connecting rods. The outer ends of the first and second connecting rods on the same vertical plane are rotatably connected to an L-shaped support plate. A cylinder is provided in the mounting base, and the output end of the cylinder passes through the fixed column and is connected to a first moving column. Multiple third connecting rods are rotatably connected to the side of the first moving column, and the third connecting rods are rotatably connected to the L-shaped support plate on the same vertical plane. Multiple vertical slots are provided on the side of the insertion groove, and the vertical slots cooperate with the horizontal part of the L-shaped support plate.

[0005] The aforementioned drone fire extinguishing projectile has multiple side wings located below the insertion slot at the tail end of the projectile body.

[0006] The aforementioned fire extinguishing bomb for drones includes an ignition mechanism comprising a controller, an electric igniter, and a ignition tube; the ignition tube extends into a detonator; the ignition end of the electric igniter is connected to the ignition tube; and the controller is connected to the electric igniter via a circuit.

[0007] The aforementioned fire extinguishing projectile for drones has a secondary ignition mechanism at its head. The secondary ignition mechanism includes a sliding groove at the head of the projectile, which is connected to a detonator. A second moving column is slidably connected within the sliding groove, and a contact plate is provided at the outer end of the second moving column. A firing pin is provided at the inner end of the second moving column, and the firing pin is coaxially arranged with the detonator.

[0008] The aforementioned fire extinguishing bomb for drones has a ring located below the firing pin at the inner end of the second moving column, and a spring is provided on the ring, with the spring surrounding the outside of the firing pin.

[0009] The aforementioned fire extinguishing bomb for drones uses a dry powder fire extinguishing agent with a diameter of 5–10 μm.

[0010] The aforementioned fire extinguishing bomb for drones has multiple through holes on the top of the mounting base.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. In this invention, the projectile is mounted on the drone via a suspension mechanism. An L-shaped support plate is placed into the insertion slot, with its horizontal portion aligned with the vertical slot. The retraction of the cylinder's telescopic end causes the first moving column to move upwards. This movement of the first moving column causes the third connecting rod to rotate. Under the action of the first and second connecting rods, the L-shaped support plate expands outwards and rises upwards, ensuring its vertical portion is flush with the inner wall of the insertion slot and its upper horizontal surface abuts against the upper end of the vertical slot. This completes the mounting of the projectile, improving stability and reducing the projectile's sway during drone flight. When the projectile needs to be released, the cylinder's telescopic end extends outwards, causing the L-shaped support plate to converge inwards, preventing its horizontal portion from contacting the vertical slot. The projectile falls, releasing the projectile. An ignition mechanism then detonates the detonator, distributing the extinguishing agent to the fire. Therefore, this invention effectively reduces the swaying of the fire extinguishing projectile during drone flight, offering advantages such as simple mounting and high stability.

[0013] 2. In this invention, when the ignition mechanism fails to detonate the detonator, the projectile lands, causing the contact plate of the secondary ignition mechanism to contact the ground. Under this impact force, the firing pin rapidly strikes the detonator to detonate, preventing duds. The spring design prevents force from being applied to the contact plate during handling or mounting, thus avoiding safety issues caused by the firing pin colliding with the detonator. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the suspension mechanism;

[0016] Figure 3 This is a structural diagram of the connecting rod;

[0017] Figure 4 This is a structural diagram of the insertion slot and suspension mechanism;

[0018] Figure 5 This is a schematic diagram of the internal structure of this utility model.

[0019] The labels in the attached diagram are as follows: 1-projectile body, 2-cavity, 3-detonator, 4-ignition mechanism, 5-extinguishing agent, 6-insertion groove, 7-suspension mechanism, 8-mounting base, 9-fixed column, 10-first connecting rod, 11-second connecting rod, 12-L-shaped support plate, 13-cylinder, 14-first moving column, 15-third connecting rod, 16-vertical groove, 17-secondary ignition mechanism, 18-side wing, 19-controller, 20-electric ignition head, 21-ignition tube, 22-through hole. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0021] Example: A fire extinguishing bomb for drones, configured as follows Figure 1-5 As shown, it includes projectile 1, such as Figure 5 As shown, the projectile body 1 has a cavity 2, a detonator 3 is disposed in the middle of the cavity 2, and an ignition mechanism 4 is disposed above the detonator 3; the cavity 2 is filled with a fire extinguishing agent 5; the tail of the projectile body 1 has an insertion groove 6, such as... Figure 4 As shown, a suspension mechanism 7 is provided in the insertion slot 6; the suspension mechanism 7 includes a mounting base 8, and a fixing post 9 is fixedly connected to the lower end of the mounting base 8, such as... Figure 2 and 3 As shown, the side of the fixed column 9 is rotatably connected to multiple first connecting rods 10 and second connecting rods 11, with the first connecting rods 10 located above the second connecting rods 11. The outer ends of the first connecting rods 10 and second connecting rods 11 on the same vertical plane are rotatably connected to an L-shaped support plate 12. The vertical part of the L-shaped support plate 12 has a certain curvature, so that when the projectile 1 is mounted, the L-shaped support plate 12 fits more closely to the inner wall of the insertion slot 6. The mounting base 8 is equipped with a cylinder 13, and the output end of the cylinder 13 passes through the fixed column 9 and is connected to a first moving column 14. The side of the first moving column 14 is rotatably connected to multiple third connecting rods 15, and the third connecting rods 15 are rotatably connected to the L-shaped support plate 12 on the same vertical plane. The side of the insertion slot 6 is provided with four vertical slots 16, which cooperate with the horizontal part of the L-shaped support plate 12. The head of the projectile 1 is provided with a secondary ignition mechanism 17.

[0022] Preferably, such as Figure 1 As shown, the projectile 1 has multiple side wings 18 located below the insertion slot 6 at its tail. The side wings 18 ensure that the projectile 1 lands vertically downwards when it detonates during fire extinguishing.

[0023] Preferably, such as Figure 3As shown, the ignition mechanism 4 includes a controller 19, an electric igniter 20, and a ignition tube 21. The ignition tube 21 extends into the detonator 3. The controller 19 contains a battery and a control board. The battery provides power to the control board and the electric igniter 20. The control board is a PCBA board, which integrates a processor, a signal receiver, a timer, and other electronic devices. The processor can be an MCU. Since the control board is a common component in this field and is commercially available, its specific structure and circuit connections will not be described here. The signal receiver integrated on the control board can remotely send a detonation signal for detonation, or the timer can be used to set the detonation time for delayed detonation. The ignition end of the electric igniter 20 is connected to the ignition tube 21. The controller 19 is connected to the electric igniter 20 via a circuit. The controller 19 controls the electric igniter 20 to ignite the ignition tube 21, which ignites the gunpowder in the detonator 3, thus achieving detonation.

[0024] Preferably, the secondary ignition mechanism 17 includes a sliding groove disposed at the head of the projectile 1, the sliding groove being connected to the detonator 3; a second moving column is slidably connected within the sliding groove, the outer end of the second moving column being provided with a contact plate, the contact plate being used to increase the contact area between the second moving column and the ground; the inner end of the second moving column is provided with a firing pin, the firing pin being coaxially arranged with the detonator 3. The inner end of the second moving column is provided with a ring located below the firing pin, the ring being provided with a spring, the spring being wrapped around the outer side of the firing pin. When the ignition mechanism 4 fails to detonate the detonator 3, the projectile 1 lands, causing the contact plate of the secondary ignition mechanism 17 to contact the ground. Under the action of this impact force, the firing pin rapidly strikes the detonator 3 to detonate, preventing duds. By providing a spring, it is possible to prevent force from being applied to the contact plate during handling or mounting, thus preventing safety issues caused by the collision between the firing pin and the detonator 3.

[0025] Preferably, the extinguishing agent 5 is a dry powder extinguishing agent with a diameter of 5 to 10 μm.

[0026] Preferably, such as Figure 2 As shown, the top of the mounting base 8 has multiple through holes 22. By aligning the through holes 22 with the threaded holes on the drone and screwing in bolts, the mounting base 8 is fixed to the drone.

[0027] Working principle:

[0028] When mounting the suspension mechanism 7 to the drone and attaching the fire extinguishing bomb, the L-shaped support plate 12 is placed into the insertion slot 6, and the horizontal part of the L-shaped support plate 12 is aligned with the vertical slot 16. The retraction end of the cylinder 13 causes the first moving column 14 to move upward. When the first moving column 14 moves, the third connecting rod 15 rotates. Under the action of the first connecting rod 10 and the second connecting rod 11, the L-shaped support plate 12 is pushed outward and raised upward, so that the vertical part of the L-shaped support plate 12 is in close contact with the inner wall of the insertion slot 6 and the upper end surface of the horizontal part abuts against the vertical slot. At the upper end of 16, the projectile 1 is mounted, improving the stability of the mounting and reducing the shaking of the projectile 1 during the flight of the drone. When the projectile 1 needs to be released, the telescopic end of the cylinder 13 extends outward, causing the L-shaped support plate 12 to converge inward. The horizontal part of the L-shaped support plate 12 does not contact the vertical groove 16, and the projectile 1 falls to achieve release. Then, the detonator 3 is detonated by the ignition mechanism 4, and the fire extinguishing agent 5 is sprayed to the fire to extinguish the fire. If the ignition mechanism 4 fails to detonate successfully, the secondary ignition mechanism 17 detonates the detonator 3 due to the collision after the projectile 1 lands, achieving secondary detonation.

Claims

1. A fire extinguishing projectile for unmanned aerial vehicles, comprising a projectile body (1), a cavity (2) inside the projectile body (1), a detonator (3) disposed in the middle of the cavity (2), and an ignition mechanism (4) disposed above the detonator (3); the cavity (2) is filled with a fire extinguishing agent (5); characterized in that: The projectile (1) has an insertion groove (6) at its tail, and a suspension mechanism (7) is provided in the insertion groove (6); the suspension mechanism (7) includes a mounting base (8), and a fixing post (9) is fixedly connected to the lower end of the mounting base (8). A plurality of first connecting rods (10) and second connecting rods (11) are rotatably connected to the side of the fixing post (9). The first connecting rods (10) are located above the second connecting rods (11); the outer ends of the first connecting rods (10) and the second connecting rods (11) on the same vertical plane are The L-shaped support plate (12) is rotatably connected to the mounting base (8); a cylinder (13) is provided inside the mounting base (8), and the output end of the cylinder (13) passes through the fixed column (9) and is connected to the first moving column (14). The side of the first moving column (14) is rotatably connected to multiple third connecting rods (15), and the third connecting rods (15) are rotatably connected to the L-shaped support plate (12) on the same vertical plane; the side of the insertion slot (6) is provided with multiple vertical slots (16), and the vertical slots (16) cooperate with the horizontal part of the L-shaped support plate (12).

2. The fire extinguishing bomb for unmanned aerial vehicles according to claim 1, characterized in that: The projectile (1) has multiple side wings (18) located below the insertion slot (6) at its tail.

3. The fire extinguishing bomb for unmanned aerial vehicles according to claim 1, characterized in that: The ignition mechanism (4) includes a controller (19), an electric ignition head (20), and a ignition tube (21); the ignition tube (21) extends into the detonator (3); the ignition end of the electric ignition head (20) is connected to the ignition tube (21); the controller (19) and the electric ignition head (20) are connected by a circuit.

4. The fire extinguishing bomb for unmanned aerial vehicles according to claim 1, characterized in that: The head of the projectile (1) is provided with a secondary ignition mechanism (17). The secondary ignition mechanism (17) includes a sliding groove provided on the head of the projectile (1), which is connected to the detonator (3). A second moving column is slidably connected in the sliding groove, and a contact plate is provided at the outer end of the second moving column. A firing pin is provided at the inner end of the second moving column, and the firing pin is coaxially arranged with the detonator (3).

5. The fire extinguishing bomb for unmanned aerial vehicles according to claim 4, characterized in that: The inner end of the second movable column is provided with a ring located below the firing pin, and a spring is provided on the ring, which surrounds the outside of the firing pin.

6. The fire extinguishing bomb for unmanned aerial vehicles according to claim 1, characterized in that: The extinguishing agent (5) is a dry powder extinguishing agent with a diameter of 5 to 10 μm.

7. The fire extinguishing bomb for unmanned aerial vehicles according to claim 1, characterized in that: The mounting base (8) has multiple through holes (22) on its top.

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