Jet device

Abstract

The invention discloses a spraying device which comprises a gas storage bottle, a ventilation pipeline, an agent storage tank, a spraying channel and a nozzle which are sequentially connected. The nozzle comprises a rotational flow core and a nozzle shell. A nozzle liquid inlet and a nozzle liquid outlet are formed in the two ends of the nozzle shell respectively, and a nozzle flow channel is formed between the nozzle liquid inlet and the nozzle liquid outlet. The liquid inlet of the nozzle is connected to the liquid outlet end of the spraying channel; the rotational flow core comprises rotational flow blades and a connecting plate; the rotational flow blades at least comprise a first rotational flow blade and a second rotational flow blade; wherein the first rotational flow blade is provided with a first flow channel hole, the second rotational flow blade is provided with a second flow channel hole, and the first flow channel hole and the second flow channel hole are both located in the nozzle flow channel. According to the scheme, by means of the spraying device, the high-viscosity fire extinguishing agent is rapidly atomized into fine and uniform liquid drops under the high-pressure condition, conical atomization spraying is formed, a fire area is rapidly covered, and the fire extinguishing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fire extinguishing, and in particular to a spraying device. Background Art

[0002] With the improvement of environmental awareness and the increase in requirements for fire extinguishing efficiency, traditional fire extinguishing agents such as Halon 1301 are gradually being phased out due to their damage to the ozone layer and high global warming potential (GWP). Alternative fire extinguishing agents such as Novec 1230 are becoming the mainstream choice in the market with their environmentally friendly characteristics and high fire extinguishing performance. However, existing spray devices have obvious limitations in the application of high-viscosity fire extinguishing agents. Existing spray device designs are mainly aimed at low-viscosity fire extinguishing agents, using ultrasonic, dual-fluid or medium atomization principles, but these technologies perform poorly in the spraying of high-viscosity fire extinguishing agents, with poor atomization effects, large droplet size and uneven distribution, and limited spray coverage, resulting in low fire extinguishing efficiency. Summary of the invention

[0003] In view of this, the present invention provides a spray device, which allows the fire extinguishing agent to be quickly atomized under high pressure, thereby improving the fire extinguishing efficiency.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A spray device, comprising: a gas storage bottle, a ventilation pipeline, a storage tank, a spray channel and a nozzle connected in sequence;

[0006] The gas cylinder is used to store gas to provide driving force; the agent tank is used to store fire extinguishing agent;

[0007] The nozzle comprises: a swirl core and a nozzle housing;

[0008] The two ends of the nozzle housing are respectively a nozzle liquid inlet and a nozzle liquid outlet, and a nozzle flow channel is formed between the nozzle liquid inlet and the nozzle liquid outlet; the nozzle liquid inlet is connected to the liquid outlet end of the injection channel;

[0009] The swirl core is arranged in the nozzle housing and located on the nozzle flow channel;

[0010] The swirl core comprises: swirl blades and connecting plates; the swirl blades comprise at least a first swirl blade and a second swirl blade; the extending direction of the connecting plate is consistent with the flow direction of the nozzle flow channel;

[0011] The first swirl blade and the second swirl blade are semicircular; the rounded edge side of the first swirl blade and the rounded edge side of the second swirl blade are both used for assembly with the inner peripheral wall of the nozzle housing;

[0012] The first side of the connecting plate is connected to a part of the straight side of the first swirl blade, the second side of the connecting plate is connected to a part of the straight side of the second swirl blade, the plane where the first swirl blade is located is a first plane, the plane where the second swirl blade is located is a second plane, the first plane and the second plane are both set at an angle to the flow direction of the nozzle flow channel, and the first plane and the second plane are set at an angle;

[0013] The first swirl blade is provided with a first flow channel hole, the second swirl blade is provided with a second flow channel hole, and the first flow channel hole and the second flow channel hole are both located on the nozzle flow channel.

[0014] Preferably, the ventilation pipeline is provided with a pressure reducing valve, and the storage tank is connected to the injection channel via a ball valve.

[0015] Preferably, a first pipeline and a second pipeline are arranged in parallel in the storage tank;

[0016] The upper port of the first pipe is connected to the air outlet of the ventilation pipe, the upper port of the second pipe is connected to the liquid inlet end of the injection channel, and the vertical height of the lower port of the first pipe is higher than that of the lower port of the second pipe.

[0017] Preferably, the upper port of the first pipeline is connected to the air outlet of the ventilation pipeline through a connecting interface, and the second pipeline is connected to the liquid inlet end of the injection channel through a connecting interface.

[0018] Preferably, the storage tank is provided with a safety valve, and when the pressure in the storage tank exceeds a preset value, the safety valve automatically opens to release the pressure; and / or,

[0019] A base is provided at the bottom of the storage tank, the base is made of high-strength alloy steel, and an anti-skid pad and a shock-absorbing structure are provided at the bottom of the base.

[0020] Preferably, the connecting plate is a symmetrical polygon, the first side of the connecting plate and the second side of the connecting plate are symmetrically arranged, and the first side of the connecting plate and the second side of the connecting plate are arranged at an angle.

[0021] Preferably, the first side of the connecting plate is connected to a portion of the straight side of the first swirl blade, a first water baffle is provided on another portion of the straight side of the first swirl blade, and a first gap is left between the first water baffle and the first side of the connecting plate;

[0022] The second side of the connecting plate is connected to a portion of the straight side of the second swirl blade, and a second water baffle is provided on another portion of the straight side of the second swirl blade, and a second interval is left between the second water baffle and the second side of the connecting plate;

[0023] Wherein, the first interval and the second interval are located on the nozzle flow channel.

[0024] Preferably, the first flow channel hole is opened on another part of the straight side of the first swirl blade, and the second flow channel hole is opened on another part of the straight side of the second swirl blade.

[0025] Preferably, the angle between the first plane and the second plane is 50° to 90°.

[0026] Preferably, the inner circumferential wall of the nozzle housing and the rounded edge side of the first swirl blade are detachably assembled, and the inner circumferential wall of the nozzle housing and the rounded edge side of the second swirl blade are detachably assembled.

[0027] Preferably, the diameter of the liquid inlet of the nozzle is 5 mm to 10 mm, and the diameter of the liquid outlet of the nozzle is in the range of 1.5 mm to 2.5 mm; and / or,

[0028] The length-to-diameter ratio of the liquid outlet of the nozzle is 0.5.

[0029] Preferably, the liquid outlet of the nozzle is a tapered structure, and the diameter of the liquid outlet of the nozzle gradually decreases along the direction of spraying the fire extinguishing agent.

[0030] It can be seen from the above technical solutions that the spray device provided by the present invention can rapidly atomize high-viscosity fire extinguishing agent into fine and uniform droplets under high pressure conditions, forming a conical atomization spray, quickly covering the fire area, and improving the fire extinguishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the overall structure of the injection device provided by an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the coordination of the agent storage tank and other structures provided in an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of the structure of a nozzle from a first perspective provided by an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of the structure of a nozzle from a second viewing angle provided by an embodiment of the present invention;

[0036] Figure 5 A schematic diagram of the structure of a nozzle provided by an embodiment of the present invention from a third viewing angle;

[0037] Figure 6 A schematic diagram of the structure of a swirl core from a first perspective provided by an embodiment of the present invention;

[0038] Figure 7 A schematic diagram of the structure of a swirl core from a second perspective provided in an embodiment of the present invention;

[0039] Figure 8 A front view of a nozzle provided by an embodiment of the present invention;

[0040] Fig. 9 Comparison of K factors when the nozzle sprays water and perfluorohexanone;

[0041] Fig.10 This is a comparison chart of different droplet sizes sprayed under different spray pressures.

[0042] The meanings of the reference numerals in the figures are as follows:

[0043] 1 is a gas storage cylinder, 11 is a pressure reducing valve;

[0044] 2 is a storage tank, 21 is a ball valve, 22 is a safety valve, 23 is a base, 24 is a connection interface, 25 is a lifting eye screw, 26 is a first pipeline, 27 is a second pipeline, and 28 is a sealing cover;

[0045] 3 is a nozzle, 31 is a swirl core, 311 is a first swirl blade, 312 is a connecting plate, 313 is a second swirl blade, 314 is a first flow channel hole, 315 is a second flow channel hole, 316 is a first water retaining plate, 317 is a second water retaining plate, 318 is a first spacer, 319 is a second spacer, 32 is a nozzle housing, 321 is a nozzle liquid inlet, 322 is a nozzle liquid outlet; 33 is a nut sleeve.

[0046] 4 is a ventilation duct; 5 is an injection channel. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] An embodiment of the present invention provides a spraying device, such as Figure 1-Figure 8 As shown, the gas cylinder 1, the ventilation pipe 4, the agent storage tank 2, the injection channel 5 and the nozzle 3 are connected in sequence;

[0049] The gas cylinder 1 is used to store gas to provide driving force; the agent tank 2 is used to store fire extinguishing agent, which is a high-viscosity fire extinguishing agent;

[0050] The nozzle 3 comprises: a swirl core 31 and a nozzle housing 32;

[0051] The two ends of the nozzle housing 32 are respectively a nozzle liquid inlet 321 and a nozzle liquid outlet 322, and a nozzle flow channel is formed between the nozzle liquid inlet 321 and the nozzle liquid outlet 322; the nozzle liquid inlet 321 is connected to the liquid outlet end of the injection channel 5;

[0052] The swirl core 31 is disposed in the nozzle housing 32 and is located on the nozzle flow channel;

[0053] The swirl core 31 includes: swirl blades and a connecting plate 312; the swirl blades include at least a first swirl blade 311 and a second swirl blade 313; the extending direction of the connecting plate 312 is consistent with the flow direction of the nozzle flow channel;

[0054] The first swirl blade 311 and the second swirl blade 313 are semicircular; the rounded sides of the first swirl blade 311 and the rounded sides of the second swirl blade 313 are used to assemble with the inner peripheral wall of the nozzle housing 32;

[0055] The first side of the connecting plate 312 is connected to a portion of the straight side of the first swirl blade 311 , and the second side of the connecting plate 312 is connected to a portion of the straight side of the second swirl blade 313 .

[0056] The first side of the connecting plate 312 is connected to a part of the straight side of the first swirl blade 311, and the second side of the connecting plate 312 is connected to a part of the straight side of the second swirl blade 313. The plane where the first swirl blade 311 is located is the first plane, and the plane where the second swirl blade 313 is located is the second plane. Both the first plane and the second plane are arranged at an angle to the flow direction of the nozzle flow channel, and the first plane and the second plane are arranged at an angle.

[0057] The first swirl blade 311 is provided with a first flow channel hole 314 , the second swirl blade 313 is provided with a second flow channel hole 315 , and both the first flow channel hole 314 and the second flow channel hole 315 are located on the nozzle flow channel.

[0058] In the above technical solution, when fire extinguishing is required, the gas cylinder 1 provides gas to the agent tank 2 through the ventilation pipe 4 to provide a high-pressure driving force. Under the action of the driving force, the high-viscosity fire extinguishing agent stored in the agent tank 2 is sprayed toward the fire source through the injection channel 5 and the nozzle 3 in sequence; in the above process, the high-viscosity fire extinguishing agent is rapidly atomized into fine and uniform droplets under high pressure conditions, forming a conical atomization spray, quickly covering the fire area, and the power is provided by the gas cylinder 1, which shortens the fire extinguishing response time and improves the efficiency of fire extinguishing. It should also be noted that when the liquid passes through the swirl core quickly, under the action of the first swirl blade 311 and the second swirl blade 313, the liquid undergoes a certain rotation through the first flow channel hole 314 and the second flow channel hole 315, thereby ensuring that the liquid ensures that the fire extinguishing agent is rapidly atomized under high pressure, and the atomized liquid is sprayed out from the nozzle outlet 322 to achieve full coverage of the fire source.

[0059] Optimize the above technical solutions, such as Figure 1 and Figure 2 As shown, the ventilation pipe 4 is provided with a pressure reducing valve 11, and the storage tank 2 is connected to the injection channel 5 through a ball valve 21. In this solution, the pressure reducing valve 11 is used to adjust the output pressure of the high-pressure gas; the ball valve 21 is used to adjust the flow of the fire extinguishing agent. Through the arrangement of the pressure reducing valve 11 and the ball valve 21, the flow and flow rate of the fire extinguishing agent can be effectively controlled for fire sources of different sizes. It should be noted that the device is also provided with a pressure monitoring meter, which can monitor the pressure state inside the gas cylinder 1 and the storage tank 2 in real time. In addition, the ball valve 21 adopts a full-bore design, which can accurately adjust the flow of the fire extinguishing agent; the ball valve 21 is connected to the outlet of the storage tank 2 by a thread, and is equipped with a high-temperature resistant sealing ring to ensure air tightness and liquid tightness.

[0060] To further optimize the above technical solution, in order to enable the first ventilation duct 4 to withstand high-pressure operation within 1 MPa, the first ventilation duct 4 is a high-pressure resistant air intake duct, and the high-pressure resistant air intake duct is made of corrosion-resistant alloy or high-strength composite material.

[0061] Further optimization of the above technical solution, such as Figure 2 As shown, a first pipeline 26 and a second pipeline 27 are arranged in parallel in the storage tank 2;

[0062] The upper end of the first pipe 26 is connected to the air outlet of the ventilation pipe 4, the upper end of the second pipe 27 is connected to the liquid inlet end of the injection channel 5, and the vertical height of the lower end of the first pipe 26 is higher than that of the lower end of the second pipe 27 (it can be understood that the length of the first pipe 26 is shorter than that of the second pipe 27, and the upper end of the first pipe 26 and the upper end of the second pipe 27 are located on the same horizontal plane). In the present technical solution, the gas ejected from the first pipe 26 provides high pressure for the storage tank 2, which serves as the power for the liquid to be ejected from the injection channel 5. At the same time, the vertical height of the lower end of the first pipe 26 is higher than that of the lower end of the second pipe 27, which is conducive to the high-pressure gas to squeeze the high-viscosity fire extinguishing agent, thereby providing power.

[0063] Further optimize the above technical solution, such as Figure 2 As shown, the upper port of the first pipe 26 is connected to the air outlet of the ventilation pipe 4 through the connecting interface 24, and the second pipe 27 is connected to the liquid inlet end of the injection channel 5 through the connecting interface 24. In the present technical solution, the connecting interface 24 is embedded with a high-pressure resistant sealing gasket, which can quickly realize the sealed connection of the high-pressure gas and the fire extinguishing agent, and the interface is connected by a snap or a thread to ensure easy disassembly and assembly, and realize efficient assembly and connection; in one embodiment, the air inlet interface is connected to the first pipe 26, and the discharge interface is connected to the injection channel 5; in another embodiment, the first pipe 26, the second pipe 27 and the connecting interface 24 are made of high-pressure resistant and corrosion-resistant materials, and the inner wall thereof is smooth to reduce the resistance to the flow of gas or fire extinguishing agent.

[0064] Optimize the above technical solutions, such as Figure 2 As shown, the storage tank 2 is provided with a safety valve 22. When the pressure in the storage tank 2 exceeds a preset value, the safety valve 22 automatically opens to release pressure (automatically opens to release excess pressure) to ensure the safety of the operation of the device; preferably, the safety valve 22 is a spring-loaded design, and the preset value can be 0.6MPa or 0.7MPa; and / or,

[0065] A base 23 is provided at the bottom of the storage tank 2. The base 23 is made of high-strength alloy steel, and an anti-skid pad and a shock-absorbing structure are provided at the bottom of the base 23 to enhance the stability and vibration resistance of the device during operation. The base 23 provides stable support to ensure that the device operates stably in a high-pressure environment.

[0066] In an optional technical solution, in order to make the structure of the injection device more compact, the connecting plate 312 is a symmetrical polygon, the first side of the connecting plate 312 and the second side of the connecting plate 312 are symmetrically arranged, and the first side of the connecting plate 312 and the second side of the connecting plate 312 are arranged at an angle. Preferably, the angle is an acute angle, and the angle is located on the axis of the nozzle flow channel.

[0067] Optimize the above technical solutions, such as Figure 5-Figure 7 As shown, the first side of the connecting plate 312 is connected to a portion of the straight side of the first swirl blade 311, and a first water baffle 316 is provided on another portion of the straight side of the first swirl blade 311. A first gap 318 is left between the first water baffle 316 and the first side of the connecting plate 312;

[0068] The second side of the connecting plate 312 is connected to a part of the straight side of the second swirl blade 313, and a second water retaining plate 317 is provided on another part of the straight side of the second swirl blade 313. A second gap 319 is left between the second water retaining plate 317 and the second side of the connecting plate 312.

[0069] The first spacer 318 and the second spacer 319 are located on the nozzle flow channel.

[0070] In the present technical solution, the fire extinguishing agent can pass through the first interval 318 and the second interval 319, thereby increasing the speed of liquid circulation and improving the fire extinguishing efficiency; preferably, the first water retaining plate 316 and the second water retaining plate 317 are triangular plates.

[0071] Further optimize the above technical solution, such as Figure 5-Figure 7 As shown, the first flow channel hole 314 is opened on another part of the straight side of the first swirl blade 311, and the second flow channel hole 315 is opened on another part of the straight side of the second swirl blade 313. Such a setting is conducive to increasing the speed of liquid circulation and improving the fire extinguishing efficiency; it should be noted that the first flow channel hole 314 and the second flow channel hole 315 are square holes, and the width of the square hole is 0.1-0.5 times the diameter of the nozzle outlet 322, preferably 0.5 times; Figure 5 As shown, a sleeve nut sleeve 33 is provided at one end near the nozzle outlet 322, and the nut sleeve 33 is used to fix or rotate the swirl nozzle 3. In addition, the swirl core 31 is made of a high temperature resistant and corrosion resistant alloy material. At the same time, the nozzle housing 31 is also made of a high temperature resistant and corrosion resistant alloy material, which can withstand long-term use under high pressure conditions. The inner wall of the nozzle housing 31 is finely processed and polished to reduce the resistance to the flow of the fire extinguishing agent.

[0072] Further optimization of the above technical solution, such as Figure 6 and Figure 7As shown, the angle between the first plane and the second plane is 50° to 90° (that is, the angle between the first swirl blade 311 and the second swirl blade 313 is 50° to 90°), so that a stable high-speed rotating liquid film can be formed in the nozzle flow channel to improve the atomization effect of the fire extinguishing agent. A larger angle can increase the intensity of liquid rotation, increase centrifugal force, and promote the liquid to be more easily broken into fine droplets at the outlet. If the angle is too small, the rotation effect may be insufficient; if the intersection angle is too large, it may cause flow blockage and increase flow resistance. Therefore, as a preferred embodiment, the angle is preferably 70°; due to the setting of the angle, the swirl core 31 forms an "X"-shaped cross blade structure as a whole.

[0073] Further optimize the above technical solution, such as Figure 3 As shown, the nozzle liquid inlet 321 and the liquid outlet end of the injection channel 5 are connected by threads, wherein the outer peripheral wall of the nozzle liquid inlet 321 is provided with threads, and the threaded connection provides reliable sealing and can prevent leakage of the fire extinguishing agent or gas.

[0074] Further optimize the above technical solution, such as Figure 3-Figure 5 As shown, in order to realize the detachable assembly between the swirl core 31 and the nozzle housing 32, the inner circumferential wall of the nozzle housing 32 and the circular edge side of the first swirl blade 311 are detachable and assembled, and the inner circumferential wall of the nozzle housing 32 and the circular edge side of the second swirl blade 313 are detachable and assembled. Preferably, the swirl core 31 is an integrated structure, and the swirl core 31 in the nozzle housing 32 adopts a modular design, which can be quickly disassembled and replaced to adapt to the characteristics of different fire extinguishing agents.

[0075] To further optimize the above technical solution, the diameter of the nozzle liquid inlet 321 is 5 mm to 10 mm, preferably 6.6 mm, and the diameter of the nozzle liquid outlet 322 is 1.5 mm to 2.5 mm, preferably 2.4 mm; and / or,

[0076] like Figure 8 As shown, the aspect ratio (a / b) of the nozzle liquid outlet 322 is 0.5, so as to ensure that the fire extinguishing agent is quickly atomized under high pressure and evenly distributed in the spraying area; wherein a is the length of the nozzle liquid outlet 322, and b is the diameter of the nozzle liquid outlet 322.

[0077] To further optimize the above technical solution, the nozzle outlet 322 is a tapered structure, the radius of the nozzle outlet 322 gradually decreases along the direction of spraying high-viscosity fire extinguishing agent, and the expansion angle of the tapered structure is generally controlled between 5°-10° (that is, the angle between the generatrix of the expansion part from the narrow mouth to the wide mouth and the central axis of the nozzle outlet 322 is 5°-10°), ensuring that the liquid maintains steady acceleration when passing through the nozzle outlet 322. The tapered nozzle outlet 322 can gradually accelerate the flow of liquid, increase the outlet flow rate, and make the liquid easier to break into fine droplets when spraying. This design can reduce the turbulence of the liquid in the hole and promote atomization while maintaining the aspect ratio of the nozzle outlet 322. The tapered structure of the nozzle outlet 322 can be understood as a conical structure, so that the spray angle range reaches 40° to 90°, preferably 60°, forming a conical atomization spray, thereby quickly covering the fire source area.

[0078] In one embodiment, if Figure 1-Figure 7 As shown, the agent storage tank 2 is provided with a lifting screw 25, which is used to open and close the sealing cover 28. The lifting screw 25 is made of high-strength stainless steel, and the sealing cover 26 can be opened and closed when it is twisted; the sealing cover 26 is embedded with a corrosion-resistant rubber sealing ring to ensure the airtightness of the agent storage tank 2 under a high-pressure environment; the tank body of the agent storage tank 2 is made of high-pressure resistant and corrosion-resistant alloy steel material, and the inner wall is polished to reduce the adhesion and resistance generated by the fire extinguishing agent during the flow process.

[0079] In one embodiment, the swirl core 31 can form a stable high-speed rotating liquid film in the nozzle housing 31 through the rotation of the swirl blades. The liquid film is quickly broken into uniform and fine droplets under the action of centrifugal force and aerodynamic force, thereby improving the atomization effect of the fire extinguishing agent.

[0080] In actual application, a technical solution is to adjust the aspect ratio of the nozzle liquid outlet 322. For the injection of high-viscosity liquids, the aspect ratio of the nozzle liquid outlet 322 should be between 0.5 and 4. This range can provide a stable flow state, which is conducive to controlling the atomization effect of the liquid. By adjusting the aspect ratio of the nozzle liquid outlet 322, the flow state of the liquid during the injection process is controlled and the atomization effect is enhanced. A larger aspect ratio helps to maintain the stability of the liquid jet and reduce turbulence, thereby promoting more uniform atomization and forming finer droplets. High-viscosity liquids are prone to unstable flow and turbulence during the injection process, resulting in an increase in the atomized particle size. Increasing the aspect ratio of the nozzle liquid outlet 322 can allow the liquid to have a longer flow path inside the nozzle 3, promote flow development, and obtain a higher linear speed and stability at the outlet, reduce turbulence, and then break the liquid into smaller droplets.

[0081] In another technical solution, the structure of the swirl core 31 is designed and optimized. The geometric structure of the swirl core 31 and the width of the flow channel hole directly affect the rotation intensity of the liquid, and then affect the droplet breakup effect. By enhancing the rotation effect of the swirl core, a greater centrifugal force can be generated during the injection process, so that the liquid forms finer droplets during the breakup process. Especially for high-viscosity liquids, optimizing the swirl core design can significantly improve the dispersion and atomization effect of the liquid.

[0082] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown separately in the drawings can be combined with each other arbitrarily, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents clearly recorded in this article. Any of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features.

[0083] The present invention is further described below in conjunction with specific embodiments:

[0084] The present invention proposes a spraying device, which can realize efficient atomization of high-viscosity fire extinguishing agent under 0.3MPa-0.5MPa conditions through a pressure-driven system (the arrangement of a gas cylinder 1 and a storage tank 2) and an optimized nozzle 3 structure, forming fine and uniform droplets to ensure rapid and comprehensive coverage of the fire area. It is particularly suitable for closed or semi-enclosed spaces such as data centers, museums, archives, and precision manufacturing workshops that require rapid and efficient fire extinguishing and have high requirements for equipment safety. The present invention aims to improve the atomization efficiency and coverage of the fire extinguishing agent, while ensuring that the fire extinguishing agent is evenly released under high pressure conditions, reducing the amount used and reducing the impact on the environment and equipment.

[0085] In one technical solution, the width of the flow channel hole (i.e., the first flow channel hole 314 and the second flow channel hole 315) determines the flow resistance and rotation speed of the liquid inside the swirl core. In order to obtain a refined droplet size, the width of the flow channel hole of the "X"-shaped swirl core should be appropriately reduced to increase the rotation intensity and reduce turbulence. The flow channel hole width is designed to be 0.2-0.5 times the diameter of the nozzle liquid inlet 321. Narrower flow channel holes can accelerate liquid flow, increase rotation intensity, and increase centrifugal force.

[0086] In order to further improve the rotation effect, a multi-stage cross swirl channel (such as two-stage or three-stage cross) can be designed inside the swirl core. The multi-stage cross design can make the liquid subject to multiple rotations during the flow process, gradually increase the rotation intensity, form a higher centrifugal force, and help to break the liquid more finely. The angle and width of each cross channel should change step by step to gradually increase the rotation effect. The angle of the first stage can be set to a small angle (60°), and the subsequent stages can be gradually increased (to 80°) to obtain a higher rotation speed at the outlet and form finer droplets.

[0087] The advantages of the present invention compared with the prior art are:

[0088] 1. If Fig. 9 As shown, the present invention compares the K coefficients (flow coefficients) of the fire extinguishing agents with different viscosities. The K coefficient of the nozzle 3 when spraying water is 4.8, while the K coefficient when spraying perfluorohexanone is lower, which is 3.6. This reflects that the higher viscosity and density of perfluorohexanone lead to increased flow resistance and slower spraying speed.

[0089] Second, unlike traditional spraying technology, this device uses an optimized swirl nozzle, which enables high-viscosity fire extinguishing agent to form a high-speed rotating liquid film, significantly improving the atomization efficiency. Experimental data shows that under a pressure of 0.5MPa, the D90 particle size of the droplets can be reduced to below 400μm, significantly improving the spraying performance.

[0090] 3. By optimizing the swirl core structure, nozzle flow channel hole design and pressure drive system, the present invention significantly improves the atomization efficiency and injection performance of high-viscosity fire extinguishing agents, overcomes the limitations of traditional injection technology in handling high-viscosity fire extinguishing agents, improves fire fighting efficiency and reduces the amount of fire extinguishing agents used.

[0091] Fourth, it is proposed that the atomization effect can be optimized by increasing the aspect ratio of the nozzle outlet. A new swirl core design for increasing multi-stage cross swirl and a tapered nozzle hole design are proposed.

[0092] The present invention relates to a nozzle design suitable for efficient and rapid atomization release of a new type of high-viscosity gas fire extinguishing agent, which is suitable for various firefighting scenarios that require rapid response. In order to verify the design effect of the nozzle, a number of experiments were conducted to study key parameters such as droplet particle size and atomization diffusion of the nozzle under different working conditions. These experiments provide important data support for the optimization design of the nozzle.

[0093] The experimental device includes the injection device, a laser particle size analyzer, a data acquisition system and a closed experimental chamber.

[0094] Laser particle size analyzer: Use LSA-3 laser particle size analyzer to measure the droplet size formed by the spray. The particle size analyzer performs real-time analysis of the droplet size distribution based on the principle of laser scattering.

[0095] During the experiment, the nozzle sprayed high-viscosity fire extinguishing agent under different pressure conditions, and measured and recorded key parameters such as flow rate, droplet size, spray coverage and temperature change. The experiment included the following steps:

[0096] 1. The fire extinguishing agent is stored in a pressure container and sprayed by high-pressure nitrogen.

[0097] 2. The K coefficient of the nozzle spraying water and perfluorohexanone under the same driving pressure conditions is measured by a clamp-type flow sensor.

[0098] 3. Measure the droplet size distribution of the spray by laser particle size analyzer.

[0099] like Fig. 9 Nozzle K-factor calculation: A clamp-on flow sensor monitors the liquid flow rate within the experimental system in real time. The K-factor for water is stable at 4.8, indicating stable flow behavior. In contrast, perfluorohexanone has a lower K-factor of 3.6, reaching about 75% of the water flow rate at the same pressure. This difference is attributed to the higher viscosity and density of perfluorohexanone, which increases the flow resistance and reduces its velocity through the nozzle. The results highlight the impact of physical properties, such as viscosity and density, on nozzle performance.

[0100] Atomization characteristics measurement: such as Fig.10 As shown in the figure, the atomization characteristics of the nozzle under different injection pressures, especially the droplet size, were studied. The experimental measurement results show that at a pressure of 0.3MPa, the droplet size is shown as D90=531.49μm and D50=313.24μm. When the pressure increases to 0.4MPa, the droplet size decreases to D90=488.28μm and D50=259.32μm. At a pressure of 0.5MPa, the droplet size is further reduced to D90=414.96μm and D50=221.28μm. The experimental results show that the design of the swirl core inside the nozzle significantly improves the atomization performance. Under the condition of increased pressure, the droplet size is significantly reduced and the distribution is more uniform. This design can meet the strict requirements of efficient fire extinguishing systems for rapid atomization and wide-angle coverage of fire extinguishing agents.

[0101] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0102] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A spraying device, characterized in that: include: A gas storage bottle (1), a ventilation pipe (4), a storage tank (2), an injection channel (5) and a nozzle (3) connected in sequence; The gas cylinder (1) is used to store gas to provide driving force; the agent tank (2) is used to store fire extinguishing agent; The nozzle (3) comprises: a swirl core (31) and a nozzle housing (32); The two ends of the nozzle housing (32) are respectively a nozzle liquid inlet (321) and a nozzle liquid outlet (322), and a nozzle flow channel is formed between the nozzle liquid inlet (321) and the nozzle liquid outlet (322); the nozzle liquid inlet (321) is connected to the liquid outlet end of the injection channel (5); The swirl core (31) is arranged in the nozzle housing (32) and is located on the nozzle flow channel; The swirl core (31) comprises: swirl blades and a connecting plate (312); the swirl blades comprise at least a first swirl blade (311) and a second swirl blade (313); the extending direction of the connecting plate (312) is consistent with the flow direction of the nozzle flow channel; The first swirl blade (311) and the second swirl blade (313) are semicircular; the rounded side of the first swirl blade (311) and the rounded side of the second swirl blade (313) are both used for assembly with the inner peripheral wall of the nozzle housing (32); The first side of the connecting plate (312) is connected to a portion of the straight side of the first swirl blade (311), the second side of the connecting plate (312) is connected to a portion of the straight side of the second swirl blade (313), the plane where the first swirl blade (311) is located is the first plane, the plane where the second swirl blade (313) is located is the second plane, the first plane and the second plane are both arranged at an angle to the flow direction of the nozzle flow channel, and the first plane and the second plane are arranged at an angle; The first swirl blade (311) is provided with a first flow channel hole (314), the second swirl blade (313) is provided with a second flow channel hole (315), and the first flow channel hole (314) and the second flow channel hole (315) are both located on the nozzle flow channel.

2. The spraying device according to claim 1, characterized in that The ventilation pipeline (4) is provided with a pressure reducing valve (11), and the storage tank (2) is connected to the injection channel (5) via a ball valve (21).

3. The spraying device according to claim 2, characterized in that A first pipeline (26) and a second pipeline (27) are arranged in parallel in the agent storage tank (2); The upper end of the first pipe (26) is connected to the air outlet of the ventilation pipe (4), the upper end of the second pipe (27) is connected to the liquid inlet end of the injection channel (5), and the vertical height of the lower end of the first pipe (26) is higher than that of the lower end of the second pipe (27).

4. The spraying device according to claim 3, characterized in that The upper end of the first pipeline (26) is connected to the air outlet of the ventilation pipeline (4) through a connection interface (24), and the second pipeline (27) is connected to the liquid inlet end of the injection channel (5) through a connection interface (24).

5. The spraying device according to claim 4, characterized in that The storage tank (2) is provided with a safety valve (22), and when the pressure in the storage tank (2) exceeds a preset value, the safety valve (22) automatically opens to release the pressure; and / or, A base (23) is provided at the bottom of the agent storage tank (2); the base (23) is made of high-strength alloy steel, and an anti-slip pad and a shock-absorbing structure are provided at the bottom of the base (23).

6. The spraying device according to any one of claims 1 to 5, characterized in that: The connecting plate (312) is a symmetrical polygon, the first side of the connecting plate (312) and the second side of the connecting plate (312) are symmetrically arranged, and the first side of the connecting plate (312) and the second side of the connecting plate (312) are arranged at an angle.

7. The spraying device according to claim 6, characterized in that A first side of the connecting plate (312) is connected to a portion of the straight side of the first swirl blade (311); a first water baffle (316) is provided on another portion of the straight side of the first swirl blade (311); a first gap (318) is left between the first water baffle (316) and the first side of the connecting plate (312); The second side of the connecting plate (312) is connected to a portion of the straight side of the second swirl blade (313); a second water retaining plate (317) is provided on another portion of the straight side of the second swirl blade (313); a second gap (319) is left between the second water retaining plate (317) and the second side of the connecting plate (312); Wherein, the first interval (318) and the second interval (319) are located on the nozzle flow channel.

8. The spraying device according to claim 7, characterized in that The first flow channel hole (314) is opened on another part of the straight side of the first swirl blade (311), and the second flow channel hole (315) is opened on another part of the straight side of the second swirl blade (313).

9. The spraying device according to claim 7, characterized in that: The angle between the first plane and the second plane is 50° to 90°.

10. The spraying device according to claim 7, characterized in that The inner circumferential wall of the nozzle housing (32) and the rounded side of the first swirl blade (311) are detachably assembled, and the inner circumferential wall of the nozzle housing (32) and the rounded side of the second swirl blade (313) are detachably assembled.

11. The spraying device according to claim 1, characterized in that: The diameter of the nozzle liquid inlet (321) is 5 mm to 10 mm, and the diameter of the nozzle liquid outlet (322) is in the range of 1.5 mm to 2.5 mm; and / or, The length-to-diameter ratio of the nozzle liquid outlet (322) is 0.

5.

12. The spraying device according to claim 1, characterized in that The nozzle liquid outlet (322) is a gradually contracting structure, and the diameter of the nozzle liquid outlet (322) gradually decreases along the direction of spraying the fire extinguishing agent.

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