A pneumatic long-range delivery fire extinguishing bomb system

Abstract

This utility model relates to the field of fire extinguishing technology, specifically to a pneumatic long-range delivery system for fire extinguishing projectiles, comprising a pneumatic launching unit and a compressed air power unit. The pneumatic launching unit and the compressed air power unit are connected via an air supply pipeline. The pneumatic launching unit includes a barrel base and a launching barrel. One end of the barrel base is closed, and the other end is open. The launching barrel is detachably mounted on the open end of the barrel base. The closed end of the barrel base has an air supply channel connected to the air supply pipeline. The bottom wall of the closed end of the barrel base is provided with a compressed air distributor, and a touch-sensitive switch is located at the center of the compressed air distributor. This utility model helps to launch fire extinguishing projectiles more accurately to the target fire extinguishing area, and the projectiles are less likely to shatter within the barrel. This system can achieve fire extinguishing operations at a distance of 2 kilometers, ensuring the safety of firefighters while significantly reducing costs, and can be widely applied to large-scale fire fighting operations.

Description

Technical Field

[0001] This utility model belongs to the technical field of fire extinguishing bomb delivery system, specifically relating to a pneumatic long-distance delivery system for fire extinguishing bombs. Background Technology

[0002] During firefighting, maintaining an effective spatial distance between firefighters and the fire area, and conducting firefighting operations within a safe zone, can effectively reduce the damage caused by the high temperatures and shock waves from fire explosions, and prevent injuries or fatalities to firefighters. Traditional fire hoses have an effective spray distance of 70 meters, and some fire monitors have a range of up to 80 meters, but the distance from the fire site is still insufficient to achieve safe isolation. Among existing technologies, the long-range infrared automatic forest fire extinguishing missile vehicle-mounted launch system developed by CASIC (China Aerospace Science and Industry Corporation) utilizes a far-infrared fire source detection command vehicle to detect and sense initial fire points in forests and other areas from a distance. The missile launcher then launches the fire extinguishing missile, which automatically locates the fire point in flight and extinguishes it rapidly. The launch distance can reach 3-20 kilometers, but the launch cost is too high, making it uneconomical for firefighting within a 2-kilometer range.

[0003] Fire extinguishing shells have a centrally symmetrical structure, and during flight, they can tumble and deflect due to air resistance and their own center of gravity. Mortar shells typically have smoothed rifling on their inner walls to give the shell angular momentum after ejection, preventing it from spinning and deflecting. However, because fire extinguishing shells are made of lightweight materials, they are easily damaged under external pressure or high atmospheric pressure. The smoothed rifling can easily scratch the shell, causing it to break apart. Utility Model Content

[0004] To address the above technical problems, this utility model proposes a pneumatic long-range delivery system for fire extinguishing projectiles, comprising a pneumatic launching unit and a compressed air power unit; the pneumatic launching unit and the compressed air power unit are connected via an air supply pipeline;

[0005] The pneumatic launching unit includes a barrel base and a launching barrel. One end of the barrel base is closed and the other end is open. The launching barrel is detachably installed at the open end of the barrel base. The closed end of the barrel base has an air supply channel and is connected to the air supply pipeline. The bottom wall of the closed end of the barrel base is provided with a compressed air distributor. The end face of the compressed air distributor that contacts the fire extinguishing projectile is provided with a touch switch.

[0006] The compressed air power unit includes an electric air compressor and a compressed air storage unit; the electric air compressor outputs compressed air to the compressed air storage unit, and the air supply end of the compressed air storage unit is equipped with a solenoid valve, which opens when the fire extinguishing bomb triggers the touch switch.

[0007] Furthermore, after passing through the compressed air distributor, the compressed air forms multiple upward airflows that rotate around the axis of the firing barrel, with a peak tangential velocity of at least 50 m / s when the vortex core radius R = 20 mm.

[0008] Furthermore, the compressed air distributor is a concave funnel shape, including a central hub and multiple ribs radially distributed around the central hub, the openings between the ribs forming turbine-shaped air passages, the air passages between adjacent ribs having air distribution grilles, and the touch switch being mounted on the baffle.

[0009] Furthermore, the compressed air distributor includes a central pillar, around which a plurality of guide grilles are radially and uniformly distributed around the axis of the firing barrel. The first end of each guide grille is fixed to the pillar, and the second end of each guide grille is fixed to the inner wall of the firing barrel. The cross-section of the second end of each guide grille has a torsion angle of 10-20 degrees relative to the cross-section of its first end. A touch switch is mounted on the pillar.

[0010] Furthermore, the compressed air storage unit includes a large air storage cylinder and a small air storage cylinder connected in series. A throttling valve and a pressure reducing valve are provided between the large air storage cylinder and the small air storage cylinder. A pressure sensor is provided on the small air storage cylinder, and the pressure sensor is electrically connected to the touch switch.

[0011] Furthermore, the pneumatic launching unit also includes a launching bracket, which is movably connected to the gun barrel base. The launching bracket is equipped with a motor and a support rod for adjusting the elevation angle of the launching gun barrel.

[0012] Furthermore, the pneumatic launching unit is equipped with a feeding unit, which is an automatic feeding device or a feeding hole.

[0013] Furthermore, the pneumatic launching unit also includes an infrared remote sensing rangefinder and a scale used in conjunction with the infrared remote sensing rangefinder.

[0014] Furthermore, the fire extinguishing projectile is either a spherical fire extinguishing projectile or a projectile-shaped fire extinguishing projectile.

[0015] Furthermore, the electric air compressor is an electric air compressor driven by an internal combustion engine or a battery.

[0016] Furthermore, it also includes a control unit, which sends a start command to the solenoid valve switch based on the compressed air pressure and the position of the fire extinguishing bomb.

[0017] This invention helps to launch fire extinguishing bombs more accurately to the target fire extinguishing area, and the fire extinguishing bombs are not easily shattered in the barrel. The system can achieve fire extinguishing operations at a distance of 2 kilometers, which not only ensures the safety of firefighters, but also significantly reduces costs and can be applied in large-scale fire fighting operations. Attached Figure Description

[0018] Figure 1 Schematic diagrams of some embodiments;

[0019] Figure 2 Cross-sectional views of compressed air distributors in some embodiments;

[0020] Figure 3 Cross-sectional views of compressed air distributors in some embodiments;

[0021] Figure 4 : Figure 2 A partial structural schematic diagram (longitudinal section view) of an embodiment;

[0022] Figure 5 : A control logic diagram of one embodiment;

[0023] Figure 6 : A circuit connection diagram of one embodiment. Detailed Implementation

[0024] The following embodiments further illustrate the content of this utility model, but should not be construed as limiting the utility model. Any modifications or substitutions made to the methods, steps, or conditions of this utility model without departing from its spirit and essence are within the scope of this utility model.

[0025] Some such as Figure 1-3 The pneumatic long-range delivery fire extinguishing bomb system, including Figure 1 The following are shown: a pneumatic launching unit and a compressed air power unit; the pneumatic launching unit and the compressed air power unit are connected through an air supply pipeline;

[0026] The pneumatic launching unit includes a barrel base and a launching barrel. One end of the barrel base is closed and the other end is open. The launching barrel is detachably installed at the open end of the barrel base. The closed end of the barrel base has an air supply channel and is connected to the air supply pipeline. The bottom wall of the closed end of the barrel base is provided with a compressed air distributor. The end face of the compressed air distributor that contacts the fire extinguishing projectile is provided with a touch switch.

[0027] The compressed air power unit includes an electric air compressor and a compressed air storage unit; the electric air compressor outputs compressed air to the compressed air storage unit, and the air supply end of the compressed air storage unit is equipped with a solenoid valve, which opens when the fire extinguishing bomb triggers the touch switch.

[0028] The specific implementation of the compressed air storage unit involves a large and a small air storage cylinder connected in series, linked by a compressed gas pipeline, such as... Figure 1 A throttle valve and a pressure reducing valve are connected in series on the compressed gas pipeline.

[0029] A trigger-type switch can be implemented using a trigger-type solenoid valve or a photoelectric switch.

[0030] The firing barrel and the barrel base are connected by flanges or threads, and sealing gaskets are provided between the flanges.

[0031] Figure 1 In one embodiment, the compressed air, after passing through the compressed air distributor, forms multiple streams of airflow that rotate and rise around the axis of the firing barrel, with a peak tangential velocity of at least 50 m / s when the vortex core radius R = 20 mm.

[0032] Based on the above embodiments, some embodiments have the following characteristics: Figure 2 The compressed air distributor is a concave funnel shape, including a central hub and multiple ribs radially distributed around the central hub. The openings between the ribs form turbine-shaped air passages, and the air passages between adjacent ribs have air distribution grilles. The touch switch is mounted on the baffle.

[0033] Other embodiments have, for example Figure 3 A compressed air distributor includes a central column and a plurality of radially distributed guide grids around the column. The first end of each guide grid is fixed to the column, and the second end of each guide grid is fixed to the inner wall of the firing barrel. The cross-section of the second end of each guide grid has a torsion angle of 10-20 degrees relative to the cross-section of its first end. A trigger switch is mounted on the column.

[0034] Because the compressed air distributor has a hollow structure, its edge is fixed to the inner wall of the barrel base, and there is a gap between the bottom wall of the barrel base and the compressed air distributor to allow air to flow in. When compressed air enters the barrel from the bottom, firstly, the compressed air distributor can generate a turbine-shaped air passage to apply thrust while providing the fire extinguishing projectile with an initial velocity for rotation around its own central axis of symmetry. The vortex-like airflow generated by the compressed air distributor has a peak tangential velocity of at least 50 m / s when the vortex core radius R = 20 mm, and the pressure in the central area is about 10 kPa lower than that in the periphery. Secondly, the compressed air distributor distributes the compressed air relatively evenly to the bottom of the barrel, avoiding excessively high local pressure that could cause the fire extinguishing projectile to break up inside the barrel. The peak pressure provided by the air supply unit does not exceed 10 MPa, and the initial velocity of the fire extinguishing projectile does not exceed 200 m / s to prevent the fire extinguishing projectile from disintegrating under high pressure.

[0035] The compressed air power unit in the above embodiments can drive an air compressor through an internal combustion engine or a battery-powered electric motor, and provide a fixed amount of stable compressed air at a set pressure to the pneumatic launching unit through a compressed air bottle and a solenoid valve. Taking a fire extinguishing bomb with a diameter of 18 cm as an example, the air pressure at the bottom of the fire extinguishing bomb reaches at least 1 MPa after the solenoid valve is opened for 1 millisecond.

[0036] like Figure 1 A pressure sensor is installed on the small gas cylinder, and the pressure sensor is electrically connected to the touch switch. Figure 1 Based on the aforementioned embodiments, some embodiments use photoelectric induction switches as the trigger switches. When the trigger switch (photoelectric induction switch) is activated by sensing a fire extinguishing projectile, it sends a corresponding signal to open the compressed air supply solenoid valve, supplying compressed air into the barrel. The expansion of the compressed air then propels the fire extinguishing projectile out of the barrel. The pressure sensor is connected in series with the contact switch at the bottom of the firing barrel (AND gate control). When the pressure in the small gas cylinder reaches the set pressure, the pressure sensor activates. If the fire extinguishing projectile then triggers the photoelectric switch inside the barrel, the electromagnetic signal can drive the gas supply solenoid valve to activate, thus supplying gas to drive the fire extinguishing projectile. The pressure sensor on the small gas cylinder is to prevent the solenoid valve from activating due to insufficient gas pressure in the small gas cylinder, which would result in insufficient range for the fire extinguishing projectile.

[0037] like Figure 1-2 In one embodiment, the pneumatic launching unit further includes a launching bracket (not shown in the figure), which is hinged to the barrel mount. The launching bracket is equipped with a motor and a support rod for adjusting the elevation angle of the launching barrel. The launching bracket has shock-absorbing elements to buffer the recoil generated during firing.

[0038] The fire extinguishing bomb in the above embodiments is either a spherical fire extinguishing bomb or a projectile-shaped fire extinguishing bomb. The fire extinguishing bomb has a bottom surface that is adapted to the funnel shape of the air distributor. When the fire extinguishing bomb is filled into the firing barrel, its bottom surface is attached to the air distributor. The fire extinguishing bomb is filled with ABC dry powder or sand and can self-explode in the heat-sensitive area of ​​the fire.

[0039] Some implemented electric air compressors are either internal combustion engine or battery-powered, with a maximum output compressed air pressure of 4.2 MPa. Compressed air from the compressor is fed into a large air tank after passing through a one-way valve. The large air tank operates at a pressure of 3.03-4.0 MPa, and its air displacement is sufficient to meet the requirement of the firing system to launch one fire extinguishing shell every 20 seconds, at a rate of cubic meters per second (calculated as shown in Formula 1). Its capacity ensures that the compressor output pressure fluctuation is less than 10%, and its capacity is calculated to be greater than or equal to 10 times the capacity of the small air tank. A safety valve (set release pressure 4.2 MPa) and a pressure gauge are installed on the upper part of the large air tank to ensure that the large air tank does not exceed its safe operating pressure and to indicate its operating pressure, respectively. A drain valve and corresponding pipelines are installed at the lower part to release accumulated water and residual oil from the large air tank. The main function of the large air tank is to ensure the stable operation of the air compressor and to provide compressed air to the small air tank in a short time. The pressure reducing valve reduces the compressed air in the large gas cylinder to a set pressure. This pressure can be adjusted according to the required firing distance of the fire extinguishing projectile. The pressure adjustment unit is driven by a stepper motor, and the stepper motor's drive control and pressure setting are controlled by the main control system. The throttle valve is installed between the pressure reducing valve and the small gas cylinder. Its main function is to regulate the flow rate between the large and small gas cylinders, ensuring the average pressure of the fire extinguishing projectile during firing. The average pressure P... avg (Calculation method:

[0040] P out = (Initial pressure of small gas cylinder * volume + release time * flow rate of pressure reducing valve and throttle valve - amount of air leaking through the gap between the fire extinguishing grenade and the cannon barrel) / (cannon barrel volume + small gas cylinder volume + pipeline volume). Due to the effect of the compressed air distributor, the average pressure P avg =P out .

[0041] V air It is the total volume of air consumed during the propulsion process (at operating pressure P). avg (Lower volume)

[0042] Efficiency η: Leakage loss is approximately 10%;

[0043]

[0044] The small gas cylinder is equipped with a safety valve (set release pressure 3.03 MPa), a pressure gauge, and a pressure sensor. Its main function is to set the maximum driving air pressure in the barrel to no more than 3.03 MPa, preventing excessive pressure from damaging the protective layer of the fire extinguishing projectile. It also indicates the driving pressure and collects the driving pressure signal from the main controller. When the driving pressure reaches the set value, the loading indicator light illuminates, and simultaneously, the barrel nozzle closing valve is activated, opening the barrel nozzle for loading and firing fire extinguishing projectiles. The diameter of the driving air pipeline between the small gas cylinder and the barrel is larger than that between the throttle valve and the large gas cylinder. This ensures that compressed air can instantly flow from the small gas cylinder to the barrel after the activation solenoid valve opens. During the movement of the fire extinguishing projectile within the barrel, this compressed air is superimposed on the compressed air flowing from the throttle valve, jointly driving the projectile from the bottom of the barrel towards the barrel nozzle. An activation solenoid valve is installed between the small gas cylinder and the barrel. When the fire extinguishing projectile reaches the bottom of the barrel and triggers a contact switch or photoelectric switch, the activation solenoid valve opens, allowing compressed air to flow instantaneously from the small gas cylinder side to the bottom of the barrel.

[0045] Some embodiments also include a control unit, which comprises a microcontroller and a displacement sensor. The control unit sends a start command to the solenoid valve switch based on the compressed air pressure and the position of the fire extinguishing projectile. The displacement sensor, laser rangefinder, and control motor of the electric actuator are connected to the microcontroller. The displacement sensor measures the distance between the front end of the barrel and the support point, thereby calculating the angle between the firing barrel and the support. Specifically, the support is an electric actuator, which can arbitrarily adjust the angle between the barrel and the base. Through the control unit, a compressed air supply solenoid valve switch command can be issued based on the compressed air pressure and the position of the fire extinguishing projectile, controlling the compressed air to enter the bottom of the barrel to launch the fire extinguishing projectile. Furthermore, based on compressed air pressure, fire location coordinates, wind force, and other factors, the control unit calculates and outputs the firing azimuth and elevation angles of the firing barrel, achieving the fire extinguishing projectile aiming function and ensuring that the fire extinguishing projectile accurately hits the base of the flames.

[0046] One like Figure 5-6 A specific embodiment includes the following actuator: a pressure sensor mounted on the lower end face of the compressed air distributor for measuring the chamber pressure during firing. Fast dynamic response and a measurement range of 0-15 MPa (covering the design peak of 6.06 MPa with a margin) are required.

[0047] This invention does not specifically limit the working pressure (compressed air output pressure range) of the compressor (air compressor); it can be configured according to the range, and the range must correspond to the working pressure of the air compressor. In some specific embodiments, the range can be 1000-2000 meters. The calculation process for calculating the compressed air pressure based on the range is a known technology, and any known calculation method and the calculated value obtained are within the scope of this invention. A magnetic sensor measures the displacement of the projectile within the barrel, and the initial velocity V of the fire extinguishing projectile can be calculated through the differential displacement signal. Its integrated controller (preferably implemented through an ARM Cortex-M series) receives the sensor signal and outputs control signals to the aforementioned actuator; optionally, it also includes a human-machine interface for inputting target pressure or target range.

[0048] Its control system, through real-time pressure monitoring → PID calculation → closed-loop control via solenoid valve compressed air volume adjustment, can maintain the average effective pressure control accuracy within ±3%. Its control principle is as follows: Figure 5 The circuit connection relationship is as follows Figure 6 The parameters of its control system are designed as follows:

[0049] Table 1. Main Control Parameters

[0050] Mean pressure 3.03MPa ±0.1MPa Intake volume adjustment range <![CDATA[1.0-5.0m 3 ]]> <![CDATA[±0.05m 3 ]]> Response time <500ms From detection to adjustment Pressure sampling frequency 100kHz Full launch process monitoring System redundancy Dual sensor backup Automatic switching

[0051] In some embodiments, the pneumatic launching unit includes a feeding unit, which comprises an automatic loading device or a loading port (feeding unit). In other embodiments, the pneumatic launching unit further includes an infrared remote sensing rangefinder and a scale used in conjunction with the infrared remote sensing rangefinder. After the fire extinguishing projectile is manually or automatically loaded into the launching barrel, photoelectric control triggers the opening and closing of a solenoid valve, controlling the entry of compressed air.

[0052] The above embodiments can either use manual aiming to calculate the range of the fire extinguishing projectile by adjusting the elevation angle of the firing barrel, or load the fire extinguishing projectile into the firing barrel using an automatic loading method. The automatic loading system can directly use or draw upon existing technologies, such as the large-load pneumatic ejection device and firing and loading method disclosed in Chinese Patent CN118514902B.

[0053] A specific embodiment of a pneumatic long-range delivery fire extinguishing bomb system is presented, with the following parameters:

[0054] The caliber (D) of the firing barrel is in the range of 24-30cm, preferably 27cm (0.27m).

[0055] Barrel length (L): 3.24m, ensuring sufficient acceleration distance to obtain a reasonable initial velocity while maintaining weapon portability.

[0056] Launch angle (O): 75°. This angle provides a high-trajectory trajectory, maximizing range and coverage area while reducing recoil impact on the launch zone.

[0057] Pressure at the base of the fire extinguishing projectile (P): 6.06 MPa (peak pressure). This is the maximum pressure at the base of the projectile at launch, calculated based on the internal ballistics. Note that the pressure value is for an average caliber of 27 cm and a selected initial velocity; in practice, the pressure will be slightly adjusted depending on the mass and caliber of the fire extinguishing projectile.

[0058] Initial velocity (V) of the fire extinguishing projectile: 150 m / s. This velocity balances range requirements and pressure limitations, ensuring that the fire extinguishing projectile effectively covers the target area (such as forest fires or industrial areas).

[0059] Fire extinguishing bomb weight (m): Actual weight may vary between 1-10 kg depending on the type of extinguishing agent. A 27cm diameter spherical fire extinguishing bomb weighs 1-2 kg; in this example, it weighs 1.5 kg. A 0.5-meter long cylindrical fire extinguishing bomb weighs less than 10 kg.

[0060] Based on internal ballistics and ballistic kinematics, the relationship between several key parameters—barrel length (L), average effective pressure (P) provided by compressed air after passing through the air supply line and compressed air distributor, and barrel caliber (D)—is determined according to Equation 2:

[0061]

[0062] in:

[0063] Peak pressure P max The pressure is 6.06 MPa, where P is the average effective pressure.

[0064] P = 3.03 MPa = 3.03 × 10 6 Pa.

[0065] D is the aperture (unit: m);

[0066] L is the length of the cannon barrel (unit: m);

[0067] m is the mass of the fire extinguishing bomb (unit: kg);

[0068] π is the mathematical constant of a circle (≈3.1416).

[0069] It should be noted that the barrel material in the above embodiments is high-strength steel (such as 4340 alloy) and can withstand peak pressures of 6-10 MPa.

[0070] Fire extinguishing bomb outlet pressure P out The calculation formula is as follows:

[0071] P out= (Initial pressure of small gas cylinder * volume + release time * flow rate of pressure reducing valve and throttle valve - amount of air leaked through the gap between the fire extinguishing bomb and the cannon barrel) / (cannon barrel volume + small gas cylinder volume + pipeline volume).

[0072] By combining aerodynamic system characteristics with ballistics, and through real-time pressure calculation and velocity prediction, the control system can precisely adjust aerodynamic parameters to achieve target launch performance.

[0073] The launch angle (O) is a mechanically set angle of the launcher used to control the ballistic trajectory. Its mathematical relationship is reflected in the external trajectory, and together with the initial velocity V, it determines the range R, as determined by Equation 3:

[0074]

[0075] Where R is the range (unit: m);

[0076] g is the acceleration due to gravity (≈9.8 m / s²). 2 );

[0077] sin(2O) is a function of the emission angle (2O is twice the emission angle).

[0078] Specifically, in this design, V = 150 m / s and O = 75°, the range R ≈ 1148 m.

[0079] This embodiment uses high-angle fire extinguishing projectiles, making it suitable for covering large fire extinguishing areas.

[0080] In this embodiment, the relationship between the average effective pressure P and the range L is adjusted by a pressure regulating valve, and the pressure magnitude indication is marked as the maximum range distance indication.

[0081] While this specification contains numerous specific implementation details, these should not be construed as limiting the scope of any utility model or the scope of the claims, but rather as descriptions of features that can embody specific embodiments of a particular utility model. Specific features described in this specification within the context of independent embodiments may also be implemented in combination with a single embodiment. Conversely, various features described within the context of a single embodiment may also be implemented independently in multiple embodiments, or in any suitable sub-combination. Furthermore, while features may be described above as acting in combination, and even initially claimed in this way, one or more features from a claimed combination may be removed from that combination in some cases, and the claimed combination may be redirected to a sub-combination or a variation thereof.

[0082] Although the present invention has been described in detail above with general descriptions, specific embodiments, and experiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A pneumatic long-range delivery fire extinguishing bomb system, characterized in that, It includes a pneumatic launching unit and a compressed air power unit; the pneumatic launching unit and the compressed air power unit are connected through an air supply pipeline; The pneumatic launching unit includes a barrel base and a launching barrel. One end of the barrel base is closed and the other end is open. The launching barrel is detachably installed at the open end of the barrel base. The closed end of the barrel base has an air supply channel and is connected to the air supply pipeline. The bottom wall of the closed end of the barrel base is provided with a compressed air distributor. The end face of the compressed air distributor that contacts the fire extinguishing projectile is provided with a touch switch. The compressed air power unit includes an electric air compressor and a compressed air storage unit; the electric air compressor outputs compressed air to the compressed air storage unit, and the air supply end of the compressed air storage unit is equipped with a solenoid valve, which opens when the fire extinguishing bomb triggers the touch switch.

2. The pneumatic long-range delivery fire extinguishing bomb system according to claim 1, characterized in that, After passing through the compressed air distributor, the compressed air forms multiple streams of airflow that rotate and rise around the axis of the firing barrel, with a peak tangential velocity of at least 50 m / s when the vortex core radius R = 20 mm.

3. The pneumatic long-range delivery fire extinguishing bomb system according to claim 2, characterized in that, The compressed air distributor is a concave funnel shape, including a central hub and multiple ribs radially distributed around the central hub. The openings between the ribs form turbine-shaped air passages, and the air passages between adjacent ribs have air distribution grilles. The touch switch is mounted on the baffle.

4. The pneumatic long-range delivery fire extinguishing bomb system according to claim 2, characterized in that, The compressed air distributor includes a central column and a plurality of radially distributed flow guide grids around the column. The first end of each flow guide grid is fixed to the column, and the second end of each flow guide grid is fixed to the inner wall of the firing barrel. The cross-section of the second end of each flow guide grid has a torsion angle of 10-20 degrees relative to the cross-section of its first end. A touch switch is mounted on the column.

5. The pneumatic long-range delivery fire extinguishing bomb system according to any one of claims 1-4, characterized in that, The compressed air storage unit includes a large air cylinder and a small air cylinder connected in series. A throttling valve and a pressure reducing valve are provided between the large air cylinder and the small air cylinder. A pressure sensor is provided on the small air cylinder, and the pressure sensor is electrically connected to the touch switch.

6. The pneumatic long-range delivery fire extinguishing bomb system according to claim 5, characterized in that, The pneumatic launching unit also includes a launching bracket, which is movably connected to the gun barrel base. The launching bracket is equipped with a motor and a support rod for adjusting the elevation angle of the launching gun barrel.

7. The pneumatic long-range delivery fire extinguishing bomb system according to claim 6, characterized in that, The pneumatic launching unit is equipped with a feeding unit, which is an automatic feeding device or a feeding hole.

8. The pneumatic long-range delivery fire extinguishing bomb system according to claim 7, characterized in that, The pneumatic launching unit also includes an infrared remote sensing rangefinder and a scale used in conjunction with the infrared remote sensing rangefinder.

9. The pneumatic long-range delivery fire extinguishing bomb system according to claim 1, characterized in that, The electric air compressor is an electric air compressor driven by an internal combustion engine or a battery.

10. The pneumatic long-range delivery fire extinguishing bomb system according to claim 1, characterized in that, It also includes a control unit, which sends a start command to the solenoid valve switch based on the compressed air pressure and the position of the fire extinguishing bomb.

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