Novel high-boiling-point fire extinguishing agent vibration atomization nozzle and fire extinguishing method

Abstract

The invention belongs to the field of fire safety, and provides a novel high-boiling-point fire extinguishing agent vibration atomization nozzle and a fire extinguishing method. The spray head comprises a mounting opening, a spray head base, a rotational flow channel, a drainage piece, a conical shrinkage hole, a vibration chamber, an eccentric rotor, a vibration body, a telescopic spring, a curved bar, a return spring, a spray head shell, a curved bar chamber, a pressurizing head, a pressure nozzle and the like. According to the high-boiling-point fire extinguishing agent vibration atomization nozzle, the eccentric rotor in the vibration chamber can be driven to rotate through power provided by the fire extinguishing agent pressurized by high-pressure nitrogen, so that the fire extinguishing agent is atomized; meanwhile, rotation of the eccentric rotor can also cause vibration of the vibrating body so as to promote atomization of the fire extinguishing agent; in addition, shock waves generated by high-speed fluid collision are effectively concentrated through the large-inner-diameter cylindrical cavity in the vibration chamber, so that the atomization effect of the fire extinguishing agent in the vibration chamber is improved, the particle size of liquid drops of the high-boiling-point fire extinguishing agent is reduced, and the fire extinguishing effect of the fire extinguishing agent is improved.

Description

Technical Field

[0001] The invention belongs to the field of fire safety and relates to a novel high-boiling-point fire extinguishing agent vibrating atomizing nozzle and a fire extinguishing method. Background Art

[0002] Currently, many fire-fighting systems at home and abroad are still equipped with Halon 1301 fire extinguishing agent (boiling point -58°C) and hydrofluorocarbons (HFCs) fire extinguishing agents (such as HFC-227ea, boiling point -16.4°C). Due to the severe depletion of the ozone layer by Halons, their use is expected to be completely phased out by 2040. Furthermore, HFCs such as HFC-227ea have been included on the list of restricted substances due to their high greenhouse effect. my country will freeze HFC production and use at baseline levels starting in 2024 and will begin a reduction in 2029. New chemical fire extinguishing agents currently undergoing in-depth research and considered to have the potential to replace Halons include high-boiling-point fire extinguishing agents such as perfluorohexanone (Novec-1230, boiling point 49°C) and 2-BTP (boiling point 32°C).

[0003] Perfluorohexanone (Novec 1230), a biodegradable perfluoroketone, is a new, environmentally friendly fire extinguishing agent. Containing no ozone-depleting components and possessing zero ODP (ozone depletion potential), it is environmentally friendly. Its low concentration, rapid extinguishing speed, and residue-free nature have led to its increasing use in firefighting applications.

[0004] 2-BTP (2-bromo-3,3,3-trifluoropropene), a new environmentally friendly fire extinguishing agent, also boasts a zero ODP value and is ozone-safe, making it an ideal halon replacement. Experimental measurements of 2-BTP's volumetric extinguishing concentration for methane-air flames show lower values than those for Halon 1301 and FM-200, demonstrating its superior fire extinguishing effectiveness. Furthermore, 2-BTP rapidly captures combustion free radicals during the extinguishing process, resulting in a faster extinguishing speed compared to Halon 1301.

[0005] However, compared to halon fire extinguishing agents, these high-boiling-point extinguishing agents are difficult to vaporize. Therefore, it is necessary to design atomizing nozzle structures and fire extinguishing methods suitable for high-boiling-point extinguishing agents to improve atomization efficiency, enable them to quickly spread and vaporize in high-temperature fires, and quickly decompose upon heating to release chemical extinguishing free radicals. This will improve the atomization efficiency of high-boiling-point extinguishing agents and effectively promote the replacement of halon fire extinguishing agents in various fire extinguishing systems.

[0006] At present, the industry has researched and developed a variety of nozzle structures for specific fire extinguishing medium fire extinguishing system nozzles, such as:

[0007] CN221713427U relates to an atomizing nozzle structure for a clean gas portable fire extinguisher. This nozzle structure is suitable for portable fire extinguishers filled with gas fire extinguishing agents, but is not suitable for high-boiling-point fire extinguishing agents that are liquid at room temperature and difficult to vaporize. It also does not combine the structural and functional characteristics of complex fixed pipe network fire extinguishing systems and the flow and transportation characteristics of fire extinguishing agents.

[0008] CN105659721B relates to a high-pressure fine water mist nozzle structure. The nozzle has the characteristics of rapid fire extinguishing, low water consumption, and corrosion resistance, and has practical application value. It is mainly designed based on the fire extinguishing agent spraying effect and fire extinguishing performance requirements when water is used as the fire extinguishing agent. The applicability of high-boiling point "halon" as an alternative fire extinguishing agent needs further evaluation.

[0009] CN113616954A relates to an aircraft cargo hold water mist fire extinguishing system and method. The system and method are designed around an aircraft cargo hold working scenario using water as the fire extinguishing medium. The dual-fluid fire extinguishing nozzle used is suitable for the fine water mist fire extinguishing medium.

[0010] In summary, how to provide a new type of high-boiling-point fire extinguishing agent atomizing nozzle that is suitable for replacing high-boiling-point "halon" fire extinguishing agent and can effectively reduce the particle size of fire extinguishing agent droplets, improve the atomization effect of fire extinguishing agent, help the fire extinguishing agent to be sprayed quickly and quickly reach the boiling point in the high-temperature environment of the fire scene and then efficiently vaporize is a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the Invention

[0011] In view of this, the object of the present invention is to provide a novel high-boiling-point fire extinguishing agent vibrating atomizing nozzle and a fire extinguishing method, which are applied to high-boiling-point fire extinguishing agents (such as 2-BTP and perfluorohexanone Novec1230).

[0012] It should be noted that the fire extinguishing agent is pressurized and liquefied using high-pressure nitrogen and filled into the fire extinguishing system's storage tank. When a fire occurs in the application scenario, the fire extinguishing agent is released from the tank via a controller and enters the fire extinguishing system pipeline network. After passing through the pipeline, it enters the atomizing nozzle. The internal structure of the atomizing nozzle fully breaks up and atomizes the high-boiling-point fire extinguishing agent, reducing the particle size of the sprayed fire extinguishing agent droplets. This makes the high-boiling-point fire extinguishing agent easier to vaporize after being sprayed, thereby improving the vaporization efficiency of the high-boiling-point fire extinguishing agent. This can improve the effectiveness of the high-boiling-point fire extinguishing agent to a certain extent and help increase its use rate in various fire scenarios.

[0013] Furthermore, in order to meet the requirements of the high-boiling-point "halon" alternative fire extinguishing system, the present invention uses a high-speed fluid of a fire extinguishing agent driven by high-pressure nitrogen to provide driving force, driving the eccentric rotor in the vibration chamber to rotate. The fire extinguishing agent rotates with the rotor and is thrown out at high speed under the action of centrifugal force, thereby prompting the fire extinguishing agent to split into small liquid mist particles, thereby improving the atomization effect of the fire extinguishing agent; at the same time, the rotation of the eccentric rotor can also cause the vibrating body to swing left and right to generate shock waves, thereby promoting further fragmentation and atomization of the fire extinguishing agent; in addition, the larger inner diameter cylindrical cavity in the vibration chamber effectively concentrates the shock waves generated by the collision of high-speed fluids, so that the fire extinguishing agent is fully atomized and released. This design improves the atomization efficiency of the fire extinguishing agent, reduces the particle size of the droplets when the fire extinguishing agent is sprayed, and helps to improve the fire extinguishing effect of the fire extinguishing agent.

[0014] The first technical purpose of the present invention is to provide a novel high-boiling-point fire extinguishing agent vibration atomizing nozzle, the nozzle comprising: a mounting port, a nozzle base, a swirl channel, a guide plate, a vibration chamber, a nozzle housing, a curved rod chamber, a pressure head and a pressure nozzle; wherein,

[0015] The nozzle base is provided with a mounting port, a swirl channel, and a guide plate; the mounting port is located at the bottom of the nozzle base; the guide plate is located at the top of the nozzle base, and the guide plate is installed at the outlet of the swirl channel; the swirl channel is located at the fire extinguishing agent outlet of the mounting port.

[0016] Furthermore, the top outer wall of the nozzle base is provided with threads, and the size of the top outer wall is consistent with the outer diameter of the guide plate; the outer wall of the mounting port is provided with threads.

[0017] It should be noted that when the fire extinguishing agent, driven by high-pressure nitrogen, enters the nozzle structure, friction occurs between the fluid and the inner wall of the swirl channel. Due to its high viscosity, the liquid adheres to the inner wall to form a swirl. The gas temporarily concentrates in the center of the swirl channel, enters the guide vane, and then enters the vibration chamber, driving the eccentric rotor to rotate. The swirl channel of this nozzle structure utilizes the inner wall structure to increase the radial and axial momentum of the fire extinguishing agent, causing it to break into thin liquid sheets. It also increases the turbulence of the fire extinguishing agent fluid, making it easier to atomize.

[0018] Furthermore, the nozzle housing is connected to the nozzle base via threads, and its top also has internal threads that can be connected to the pressure head. There is a rectangular space in the center of the nozzle housing that serves as a vibration chamber. At the same time, there is a rectangular space behind the vibration chamber in the nozzle housing that serves as a bent rod chamber. The guide plate is installed at the outlet of the vortex channel. A truncated cone-shaped conical contraction hole is provided in the middle of the guide plate, and the conical contraction hole of the guide plate is connected to the vibration chamber. The vibration chamber is located directly above the conical contraction hole, and the bent rod chamber is directly behind the vibration chamber. The vibration chamber and the bent rod chamber are separated from each other and a small hole is provided in the middle for the bent rod to connect. In addition, there is an inner concave ring at the top of the nozzle housing, which has threads inside the inner concave ring and a sealing ring on the outside of the inner concave. The conical contraction hole of the guide plate can increase the flow rate of the fire extinguishing agent and produce a good compression effect on the fire extinguishing agent, thereby reducing the droplet diameter while enhancing the axial kinetic energy of the fire extinguishing agent and increasing the droplet spray distance.

[0019] Furthermore, the vibration chamber is a cylindrical space inside the nozzle housing, with an eccentric rotor fixed in the middle by a curved rod. There is a vibrating body on each side of the eccentric rotor, and the vibrating body has a concave structure as a whole. Four telescopic springs are connected to the upper and lower sides of the other side. When the telescopic springs are not compressed, the protruding parts of the upper and lower sides of the vibrating body are tangent to the short side of the eccentric rotor. The specific situation can be seen in schematic diagram a. When the telescopic springs are compressed, the concave part of the vibrating body to which it is connected is tangent to the large circle side of the eccentric rotor, and when the eccentric rotor rotates, the lower end of the vibrating body in the compressed state is tangent to the rotation trajectory of the large circle side. The specific situation can be seen in schematic diagram b. The outlet of the conical contraction hole of the drainage plate faces the eccentric rotor, and the diameter of the outlet circle of the conical contraction hole is consistent with the width of the eccentric rotor. This structure enables most of the fluid to drive the eccentric rotor to rotate when entering the vibration chamber. When the eccentric rotor rotates, it can push the left and right vibrating bodies in the vibration chamber to vibrate back and forth, and collide and atomize the incoming fire extinguishing agent in the vibration chamber. At the same time, the rotation of the eccentric rotor will also generate vibration in the vibration chamber, which will vibrate and atomize the fire extinguishing agent in the chamber, and the concave structure of the vibrating body will concentrate on reflecting the shock waves generated by the collision of the eccentric rotor with the fluid and the flow of the fluid during rotation in the vibration chamber, thereby further atomizing the fire extinguishing agent fluid in the vibration chamber.

[0020] Furthermore, a curved rod and a return spring are provided inside the curved rod chamber; the protruding rod of the curved rod and the return spring are connected to the inner wall of the curved rod chamber, and the curved rod passes through a partition and is connected to the eccentric rotor; the return spring, in an unstretched state, horizontally connects the curved rod to the curved rod chamber. This structure utilizes the connection between the return spring and the protruding portion of the curved rod. When the eccentric rotor rotates, the curved rod is driven to rotate. When the curved rod rotates, the protruding portion of the curved rod pulls the return spring to accumulate elastic potential energy. When the eccentric rotor rotates 180°, the return spring is stretched to its longest length and the elastic potential energy is accumulated to a maximum. At this time, the elastic potential energy is released to pull the eccentric rotor back to its original position. This reciprocating process allows the eccentric rotor to rotate smoothly.

[0021] Furthermore, the pressure head has a pressure nozzle in its center, a cylindrical protrusion at its bottom, and a threaded outer wall. The pressure nozzle includes a liquid inlet, a straight-through hole, and a diffuser nozzle. The diffuser nozzle and the liquid inlet are connected by the straight-through hole, and the liquid inlet of the pressure nozzle of the pressure head is aligned with the tapered contraction hole of the drainage plate. Since the pressure nozzle of the pressure head converges to the straight-through hole, the reduced diameter of the straight-through hole helps reduce the diameter of the droplets, while increasing the resistance to the discharge of the fire extinguishing agent, reducing the flow rate, and increasing the axial kinetic energy of the droplets. The increased aperture of the diffuser nozzle also increases the coverage of the droplets.

[0022] The second technical purpose of the present invention is to provide a fire extinguishing method, which utilizes the novel high-boiling-point fire extinguishing agent vibrating atomizing nozzle as described above, and the specific operation is as follows:

[0023] The nozzle is connected to a pipeline through an installation port, and the pipeline is connected to a fire extinguishing agent storage tank filled with high-pressure nitrogen and fire extinguishing agent. The fire extinguishing agent flows out of the tank into the fire extinguishing agent delivery pipeline through an electromagnetic valve installed at the bottom of the fire extinguishing agent storage tank. The electromagnetic valve is controlled by a fire extinguishing system control button in the main control panel. When a fire occurs in the use scenario, the operator can manually press the fire extinguishing system control button in the main control panel to start the electromagnetic valve. After the coil in the electromagnetic valve is energized, magnetic force is generated to move the valve so that the fire extinguishing agent in the fire extinguishing agent storage tank quickly enters the fire extinguishing agent delivery pipeline and rushes to the nozzle under the drive of high-pressure nitrogen, is fully atomized at the nozzle and released at the pressure nozzle.

[0024] Furthermore, the fire extinguishing agent is a high boiling point fire extinguishing agent, including 2-BTP and perfluorohexanone (Novec-1230).

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention adopts an eccentric rotor in combination with a uniquely shaped vibrating body to vibrate and atomize the fire extinguishing agent and utilizes the collision with the fluid in the vibration chamber to increase the atomization efficiency of the fluid and reduce the droplet size.

[0027] 2. The present invention utilizes the special structure of the vibrating body to centrally reflect the high-speed flowing fire extinguishing agent in the vibration chamber and the shock wave generated by the eccentric rotor, thereby fully atomizing the fire extinguishing agent in the vibration chamber.

[0028] 3. The top of the nozzle disclosed in the present invention adopts a reduced-diameter nozzle to increase the atomization distance and improve the windproof performance of the droplets, and the diffusion port structure of the top nozzle increases the spray range of the fire extinguishing agent atomization and increases the fire extinguishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0030] Figure 1 It is a vertical cross-sectional schematic diagram of the novel high-boiling-point fire extinguishing agent vibration atomizing nozzle of the present invention.

[0031] Figure 2 It is a schematic diagram of the tangent a of the vibrating body rotor of the novel high boiling point fire extinguishing agent vibrating atomizing nozzle of the present invention.

[0032] Figure 3 This is a schematic diagram of the vibrating rotor tangent b of the novel high-boiling-point fire extinguishing agent vibrating atomizing nozzle of the present invention.

[0033] Figure 4 Schematic diagram of the pressure nozzle components of the new high-boiling-point fire extinguishing agent vibration atomizing nozzle

[0034] Figure 5 It is a schematic diagram of the guide plate component of the novel high-boiling-point fire extinguishing agent vibration atomizing nozzle of the present invention.

[0035] Figure 6 It is a horizontal cross-sectional schematic diagram of the novel high-boiling-point fire extinguishing agent vibrating atomizing nozzle of the present invention.

[0036] Figure 7 The diagram is a vertical cross-sectional view of the curved rod chamber of the novel high-boiling-point fire extinguishing agent vibration atomizing nozzle of the present invention.

[0037] In the figure: 1-installation port, 2-nozzle base, 3-swirl channel, 4-guiding plate, 5-conical contraction hole, 6-vibration chamber, 7-eccentric rotor, 8-vibrating body, 9-telescopic spring, 10-bend rod, 11-return spring, 12-bend rod chamber, 13-nozzle housing, 14-pressurizing head, 15-pressure nozzle, 1501-liquid inlet, 1502-straight hole, 1503-diffusion nozzle, 16-sealing ring. DETAILED DESCRIPTION

[0038] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] The term "embodiment" is used herein specifically to describe any embodiment as "exemplary," and should not be construed as superior or preferable to other embodiments. Performance indicators in the embodiments of this application were tested using conventional testing methods in the art, unless otherwise specified. It should be understood that the terms used in this application are intended solely to describe specific implementations and are not intended to limit the disclosure herein.

[0040] Unless otherwise specified, the technical and scientific terms used herein have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs; other experimental methods and technical means not specifically specified in this application refer to experimental methods and technical means commonly used by ordinary technicians in this field.

[0041] In the description of the present invention, it should be understood that the terms "middle", "upper", "lower", "ascend", "descend", "vertical", "surface", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In order to better illustrate the content of this application, numerous specific details are provided in the specific examples below. It should be understood by those skilled in the art that this application can be implemented without certain specific details. In the examples, some methods, means, instruments, equipment, etc. well known to those skilled in the art are not described in detail in order to highlight the main purpose of this application.

[0043] Under the premise of no conflict, the technical features disclosed in the embodiments of this application can be combined arbitrarily, and the resulting technical solutions belong to the contents disclosed in the embodiments of this application.

[0044] The invention discloses a novel high-boiling-point fire extinguishing agent vibration atomizing nozzle and a fire extinguishing method.

[0045] For a better understanding of the present invention, the present invention is further specifically described below through the following examples, but it should not be understood as limiting the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above invention content are also considered to fall within the scope of protection of the present invention.

[0046] Example

[0047] A new type of vibrating atomizing nozzle for high-boiling-point fire extinguishing agents features a mounting port and a swirl channel within the nozzle base. The mounting port is threaded for easy connection to a pipe. In the swirl channel, the fire extinguishing agent is driven forward by high-pressure gas, causing friction between the fluid and the inner wall of the swirl channel. This causes the highly viscous liquid to adhere to the inner wall, forming a vortex. The gas temporarily concentrates in the center of the swirl channel, entering the guide vane and then the vibration chamber, driving the eccentric rotor to rotate. This structure utilizes the swirl channel to increase the radial and axial momentum of the fire extinguishing agent, breaking it into thin liquid flakes and increasing the turbulence of the fluid, making it easier to atomize.

[0048] In the nozzle shell and the guide plate. The bottom of the nozzle shell is connected to the nozzle base through an external thread, and there is a cylindrical recessed hole on the top whose internal thread can be connected to the pressure head. There is a rectangular space in the inner center of the nozzle shell as a vibration chamber, and there is also a rectangular space behind the vibration chamber in the nozzle shell as a curved rod chamber. The guide plate has a truncated cone-shaped conical contraction hole, and the conical contraction hole of the guide plate is connected to the vibration chamber. When the fire extinguishing agent enters the guide plate through the vortex channel, the conical contraction hole of the guide plate can increase the flow rate of the fire extinguishing agent and produce a good compression effect on the fire extinguishing agent, while reducing the droplet diameter and enhancing the axial kinetic energy of the fire extinguishing agent, thereby improving the droplet spraying distance.

[0049] In the vibration chamber, an eccentric rotor is fixed in the middle of the vibration chamber by a curved rod. There is a vibrating body on each side of the eccentric rotor, and the vibrating body has an overall concave structure. Because the outlet of the conical contraction hole of the drainage plate faces the eccentric rotor, and the diameter of the outlet circle of the conical contraction hole is consistent with the width of the eccentric rotor, when the temporarily separated gas and fire extinguishing agent enter the structure, most of the gas can first drive the eccentric rotor to rotate, and then the incoming fire extinguishing fluid mixes with the gas in the chamber and drives the eccentric rotor to rotate. When the eccentric rotor rotates, it can push the left and right vibrating bodies in the vibration chamber to vibrate back and forth, generating shock waves, which break up the incoming fire extinguishing agent in the vibration chamber. At the same time, the rotation of the eccentric rotor will also throw the fire extinguishing agent in the vibration chamber out, breaking it into small liquid mist particles. The concave structure of the vibrating body will concentrate and reflect the shock waves generated by the collision and flow of the eccentric rotor and the fluid in the vibration chamber during rotation, thereby further breaking up and atomizing the fire extinguishing agent fluid in the vibration chamber.

[0050] There are a curved rod and a return spring inside the curved rod chamber. The protruding rod of the curved rod is connected to the return spring on the inner wall of the curved rod chamber. The curved rod passes through the partition in the middle of the vibration chamber and is connected to the eccentric rotor in the middle of the vibration chamber. The return spring connects the curved rod horizontally in the curved rod chamber when it is not stretched. This structure utilizes the connection between the return spring and the protruding part of the curved rod. When the eccentric rotor rotates, it drives the curved rod to rotate. When the curved rod rotates, the protruding part of the curved rod will pull the return spring to accumulate elastic potential energy. When the eccentric rotor rotates 180°, the return spring is stretched to its longest length and the elastic potential energy accumulates to the maximum. At this time, the elastic potential energy is released to pull the eccentric rotor back to its original position. This reciprocating process can make the eccentric rotor rotate smoothly, so that the vibration chamber can smoothly perform vibration atomization.

[0051] The pressure head has a central pressure nozzle and a cylindrical protrusion at its base, with a threaded outer wall. The pressure nozzle comprises a liquid inlet, a direct-ejection hole, and a diffuser nozzle. The diffuser nozzle and the liquid inlet are connected by the direct-ejection hole. After passing through the vibration chamber, the fire extinguishing agent enters the pressure nozzle directly, passes through the liquid inlet, the direct-ejection hole, and the diffuser nozzle, and is then ejected. Reducing the diameter of the direct-ejection hole helps reduce droplet diameter, while increasing the resistance to the fire extinguishing agent's ejection, reducing flow rate, and increasing the droplet's axial kinetic energy. The increased diameter of the diffuser nozzle also increases the droplet coverage.

[0052] The sprinkler is connected to the pipeline through the installation port. The pipeline is connected to the fire extinguishing agent storage tank filled with high-pressure nitrogen and fire extinguishing agent. The solenoid valve installed at the bottom of the fire extinguishing agent storage tank controls the fire extinguishing agent to flow out of the tank into the fire extinguishing agent delivery pipeline. The solenoid valve is controlled by the fire extinguishing system main control panel. When a fire occurs in the use scenario, the operator manually presses the fire extinguishing system control button on the main control panel to start the solenoid valve. When the coil in the solenoid valve is energized, magnetic force is generated to move the valve so that the fire extinguishing agent in the fire extinguishing agent storage tank quickly enters the fire extinguishing agent delivery pipeline under the drive of high-pressure nitrogen and rushes to the sprinkler, is fully atomized at the sprinkler and released at the pressure nozzle.

[0053] To further demonstrate the beneficial effects of the present invention and to facilitate a better understanding of the present invention, the following experimental examples are provided to further illustrate the technical features of the device and fire extinguishing method disclosed herein. However, these examples are not to be construed as limitations of the present invention. Other improvements made by those skilled in the art based on the above-described invention without inventive steps are also considered to fall within the scope of protection of the present invention.

[0054] The fire extinguishing method using the nozzle described in the above embodiment in an aircraft fire extinguishing system is as follows:

[0055] When a fire breaks out on an aircraft, the pilot manually presses the fire extinguishing system control button on the cockpit's main control panel. This opens the solenoid valve at the bottom of the extinguishing agent tank. Driven by high-pressure nitrogen, the extinguishing agent rapidly flows from the tank into the extinguishing agent delivery pipeline and toward the sprinkler nozzle. It then passes through the nozzle's internal swirl channel, the vibration chamber, and is ejected through the pressure nozzle. The centrifugal, impact, and vibration effects of the eccentric rotor in the vibration chamber atomize the liquid extinguishing agent into small droplets. Simultaneously, the reduced diameter of the pressure nozzle replenishes the fluid's kinetic energy, enabling faster delivery to the fire scene. The multiple swirl, collision, centrifugal, vibration, and diameter reduction accelerations described above simultaneously increase the internal energy of the droplets without sacrificing their kinetic energy, resulting in a smaller droplet size and increased specific surface area. When the droplets reach the fire scene, they not only rapidly absorb heat and heat up to their boiling point, vaporizing to lower the fire temperature, but also help the high-boiling-point fire extinguishing agent, after vaporization, release chemical extinguishing free radicals through thermal cracking reactions, thereby interrupting the fire chain reaction and enabling the fire extinguishing agent to rapidly exert its physical and chemical synergistic fire extinguishing effects. This invention can increase the firefighting efficiency of high-boiling-point fire extinguishing agents, improving the safety of civil aircraft while reducing the amount of fire extinguishing agent required for firefighting, thereby reducing aircraft weight while also lowering fuel consumption and economic costs.

[0056] Comparative Example

[0057] The nozzle structure of existing civil aircraft fire extinguishing systems consists of a simple hemispherical cavity with three fire extinguishing agent injection holes, with adjacent holes forming a 45° angle between them. It is directly connected to the fire extinguishing agent delivery pipeline and secured to its mounting compartment by two retaining nuts. When a fire occurs, the cockpit receives a fire alarm. The fire extinguishing system control button on the main control panel activates the solenoid valve. Driven by high-pressure nitrogen, the fire extinguishing agent in the tank rapidly enters the fire extinguishing agent delivery pipeline and rushes toward the nozzle, where it is discharged through three injection holes into the fire compartment. This nozzle design is primarily designed to accommodate conventional Halon 1301 fire extinguishing agent. Halon fire extinguishing agent has a very low boiling point (-58°C), so it completely vaporizes during the delivery process and enters the hemispherical nozzle in a vapor phase, where it is released into the fire area. This nozzle design lacks atomization and is relatively simple in structure. This fails to increase the kinetic energy of the fire extinguishing agent, resulting in a limited spray range. Therefore, this hemispherical nozzle is not ideal for spraying new high-boiling point fire extinguishing agents.

[0058] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A new type of high boiling point fire extinguishing agent vibration atomizing nozzle, characterized in that: The nozzle comprises: a mounting port (1), a nozzle base (2), a swirl channel (3), a guide plate (4), a vibration chamber (6), a crankshaft chamber (12), a nozzle housing (13), a pressure head (14) and a pressure nozzle (15); wherein, The nozzle base (2) is provided with a mounting port (1), a swirl channel (3), and a guide plate (4); the mounting port (1) is located at the bottom of the nozzle base (2); the guide plate (4) is located at the top of the nozzle base (2), and the guide plate (4) is installed at the outlet of the swirl channel (3); the swirl channel (3) is located at the fire extinguishing agent outlet of the mounting port (1); a truncated cone-shaped conical contraction hole (5) is provided at the center of the guide plate (4); The conical contraction hole (5) is connected to the vibration chamber (6), and the bent rod chamber (12) is provided on one side of the vibration chamber (6); The bottom of the nozzle housing (13) is connected to the nozzle base (2) via a thread, and the top of the nozzle housing (13) is provided with an internal thread connected to the pressure head (14); A pressure nozzle (15) is provided at the center of the pressure head (14), a columnar protrusion is provided at the bottom of the pressure head (14), and a circle of threads is provided on the outer wall of the columnar protrusion.

2. The high boiling point fire extinguishing agent vibrating atomizing nozzle according to claim 1, characterized in that: The top outer wall of the nozzle base (2) is provided with threads, and the size of the top outer wall of the nozzle base (2) is consistent with the outer diameter of the guide plate (4); the outer wall of the installation port (1) is provided with threads.

3. The novel high boiling point fire extinguishing agent vibrating atomizing nozzle according to claim 1 is characterized in that: The bottom inner wall of the nozzle housing (13) is provided with threads, and the nozzle housing (13) is connected to the nozzle base (2).

4. The novel high boiling point fire extinguishing agent vibrating atomizing nozzle according to claim 1 is characterized in that: The top of the nozzle housing (13) is provided with an inner concave ring, a thread is provided inside the inner concave ring, and a sealing ring (16) is provided on the outside of the inner concave.

5. The novel high boiling point fire extinguishing agent vibrating atomizing nozzle according to claim 1 is characterized in that: The bent rod chamber (12) and the vibration chamber (6) are separated from each other and are provided with a small hole for the bent rod (10) to pass through and connect.

6. The novel high boiling point fire extinguishing agent vibrating atomizing nozzle according to claim 5 is characterized in that: The vibration chamber (6) is a columnar space in the nozzle, and an eccentric rotor (7) is fixed to the middle position of the vibration chamber (6) via a bent rod (10); a vibrating body (8) is provided at each end of the eccentric rotor (7); the vibrating body (8) is generally concave in structure, and four telescopic springs (9) are provided on the outside.

7. The novel high boiling point fire extinguishing agent vibrating atomizing nozzle according to claim 6 is characterized in that: A curved rod (10) and a return spring (11) are provided inside the curved rod chamber (12); the protruding rod of the curved rod (10) and the return spring (11) are connected to the inner wall of the curved rod chamber (12), and the curved rod (10) passes through a partition and is connected to the eccentric rotor (7); the return spring (11) connects the curved rod (10) horizontally inside the curved rod chamber (12) in an unstretched state.

8. The high boiling point fire extinguishing agent vibrating atomizing nozzle according to claim 1, characterized in that: The pressure nozzle (15) comprises a liquid inlet (1501), a straight-shot hole (1502) and a diffusion nozzle (1503); the diffusion nozzle (1503) and the liquid inlet (1501) are connected via the straight-shot hole (1502), and the liquid inlet (1501) is aligned with the conical contraction hole (5).

9. A fire extinguishing method, characterized in that: The fire extinguishing method utilizes the novel high boiling point fire extinguishing agent vibrating atomizing nozzle according to any one of claims 1 to 8, and the specific operation is as follows: The nozzle is connected to the pipeline through the installation port. The pipeline is connected to the fire extinguishing agent storage tank filled with high-pressure nitrogen and fire extinguishing agent. The solenoid valve installed at the bottom of the fire extinguishing agent storage tank controls the fire extinguishing agent to flow out of the tank into the fire extinguishing agent delivery pipeline. The solenoid valve is controlled by the fire extinguishing system control button in the main control panel. When a fire occurs in the use scenario, the operator manually presses the fire extinguishing system control button in the main control panel to start the solenoid valve. After the coil in the solenoid valve is energized, magnetic force is generated to move the valve, thereby causing the fire extinguishing agent in the fire extinguishing agent storage tank to be rapidly discharged under the drive of the high-pressure nitrogen. The fire extinguishing agent quickly enters the fire extinguishing agent delivery pipeline and rushes towards the nozzle; at the nozzle, the high-speed fluid of the fire extinguishing agent driven by high-pressure nitrogen provides driving force, driving the eccentric rotor in the vibration chamber to rotate. The fire extinguishing agent rotates with the rotor and is thrown out at high speed under the action of centrifugal force, thereby causing the fire extinguishing agent to split into small liquid mist particles, improving the atomization effect of the fire extinguishing agent; at the same time, the rotation of the eccentric rotor can also cause the vibrating body to swing left and right to generate shock waves, thereby promoting further fragmentation and atomization of the fire extinguishing agent; in addition, the larger inner diameter cylindrical cavity in the vibration chamber effectively concentrates the shock waves generated by the collision of the high-speed fluid, so that the fire extinguishing agent is fully atomized and released.

10. The fire extinguishing method according to claim 9, characterized in that: The fire extinguishing agent is a high boiling point fire extinguishing agent, including 2-BTP and perfluorohexanone (Novec-1230).

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