A perfluorohexanone fire extinguisher atomizing nozzle and its usage method

Abstract

A perfluorohexanone (PFH) fire extinguisher-specific atomizing nozzle, its usage method, and applications belong to the field of fire-fighting equipment technology. The connecting pipe contains a connected agent delivery pipe and an agent manifold chamber one. The atomizing nozzle contains, sequentially, a connected agent manifold chamber two, a conical atomizing pipe, and a straight-tube spray guide pipe. An atomizing core groove is located at the bottom of agent manifold chamber two, with an atomizing through-hole at the bottom of the groove. An atomizing core is correspondingly placed within the groove. After the connecting pipe and atomizing nozzle are screwed together, agent manifold chamber one and agent manifold chamber two combine to form the atomizing manifold chamber. The atomizing manifold chamber connects to the conical atomizing pipe and the straight-tube spray guide pipe through the atomizing through-hole. This perfluorohexanone fire extinguisher-specific atomizing nozzle and its usage method ensure two-phase gas-liquid spray during fire extinguishing, guaranteeing a columnar spray onto the fire area, maximizing the use of perfluorohexanone and achieving a rapid and efficient fire extinguishing effect.

Description

Technical Field

[0001] This invention belongs to the field of fire-fighting equipment technology, specifically a perfluorohexanone fire extinguisher atomizing nozzle and its usage method. Background Technology

[0002] Traditional fire extinguisher nozzles mainly have three structures: angled nozzles, direct-flow atomizing nozzles, and water-based fire extinguishing nozzles. 1. Angled nozzles use a small-aperture angled diffusion system, which only satisfies the requirement for rapid suspension and diffusion of dry powder in the air to quickly form a dry powder extinguishing concentration in the fire area. However, this is only suitable for dry powder fire extinguishers and cannot meet the usage requirements for water-based foam, perfluorohexanone, and clean gas fire extinguishers. 2. Direct-flow atomizing nozzles have a straight-through internal structure, therefore requiring higher pressure to atomize the extinguishing agent. Compared to atomizing nozzles, direct-flow nozzles are not as effective as rotating atomizing nozzles at low pressures. Direct-flow atomizing nozzles use small-aperture atomization, requiring a certain ratio of pressure and aperture size to achieve atomization. The atomization condition itself has a high saturated vapor pressure, such as the boiling point of hexafluoropropane (-4°C). If only a small aperture is used, the atomization requirements cannot be met at low pressures, resulting in a straight column of water. Perfluorohexanone has a boiling point of 49°C, therefore this requirement cannot be met. 3. Water-based fire extinguisher nozzles utilize high-pressure driving gas to propel the extinguishing agent through a rotating atomizing nozzle. This causes the extinguishing agent to form a liquid film, which is then broken up by the airflow and atomized. The atomizing nozzles used emphasize atomization and diffusion. Because the working principle of water-based fire extinguishers is to form a dense layer of foam on the fire surface, using this foam to isolate oxygen and extinguish the fire, water-based nozzles cannot meet the requirement of maintaining a consistent extinguishing concentration of the agent within a certain time and space. Therefore, they are not suitable for use with perfluorohexanone fire extinguishers. For fire extinguishers where the agent is liquid at room temperature, such as perfluorohexanone and 2-bromotrifluoropropylene fire extinguishers, 60% of the extinguishing effect is achieved through breakage, and the remaining 40% relies on heat absorption. Using the three types of nozzles mentioned above in these cases results in unsatisfactory extinguishing effects. Summary of the Invention

[0003] To address the aforementioned problems in the existing technology, the present invention aims to design and provide a technical solution for a special atomizing nozzle for perfluorohexanone fire extinguishers and its usage method. First, the agent is atomized, and then a conical atomizing pipe and a straight-tube spray guide pipe are sequentially set at the front end of the atomizing nozzle. During fire extinguishing, it can ensure two-phase gas-liquid spray and ensure that the spray is in a columnar form on the fire extinguishing area, thereby maximizing the use of perfluorohexanone agent and achieving a rapid and efficient fire extinguishing effect.

[0004] The aforementioned perfluorohexanone fire extinguisher atomizing nozzle is characterized by comprising a connecting pipe and an atomizing nozzle. The connecting pipe contains a connected agent delivery pipe and an agent manifold chamber one. The atomizing nozzle contains, sequentially connected, an agent manifold chamber two, a conical atomizing pipe, and a straight-tube spray guide pipe. At least one atomizing core groove is located at the bottom of the agent manifold chamber two, with an atomizing through-hole at the bottom of the groove. An atomizing core is correspondingly positioned within the groove. An impact atomizing chamber, connected to the agent manifold chamber two, is located at the center of the atomizing core. At least one impact atomizing outlet is correspondingly located in the lower part of the atomizing core. An atomizing water distribution chamber is located at the bottom of the atomizing core, and a corresponding atomizing water distribution groove is located on the side wall of the atomizing core. After the connecting pipe and the atomizing nozzle are screwed together, the agent manifold chamber one and agent manifold chamber two together form the atomizing manifold chamber. The atomizing manifold chamber is connected to the conical atomizing pipe and the straight-tube spray guide pipe via the impact atomizing chamber, the impact atomizing outlet, the atomizing water distribution groove, the atomizing water distribution chamber, and the atomizing through-hole.

[0005] The aforementioned perfluorohexanone fire extinguisher atomizing nozzle is characterized in that at least one atomizing core central hole is provided at the bottom of the agent manifold, and the atomizing core central hole is connected to a conical atomizing pipe and a straight cylindrical spray guide pipe to enhance the atomization effect of the small hole.

[0006] The perfluorohexanone fire extinguisher atomizing nozzle is characterized in that an anti-detachment joint is provided on the outer wall of the connecting pipe corresponding to the agent delivery pipeline, and the connecting pipe is connected to the fire extinguisher agent outlet through the anti-detachment joint.

[0007] The aforementioned perfluorohexanone fire extinguisher atomizing nozzle is characterized in that the agent manifold is composed of a transition frustum cavity and a main cylindrical cavity, with the upper surface of the transition frustum cavity connected to the agent delivery pipeline.

[0008] The aforementioned perfluorohexanone fire extinguisher atomizing nozzle is characterized by having one, two, three, four, or five atomizing core grooves at the bottom of the agent manifold, with an atomizing through hole at the center of the bottom of each atomizing core groove; the atomizing core body has an approximately cylindrical structure, with an atomizing core boss at the top and an atomizing core cylinder below the boss; the atomizing core is inserted into the atomizing core groove, with the atomizing core boss engaging with the bottom surface of the agent manifold, and the atomizing core cylinder tightly fitted into the atomizing core groove; the outer diameter of the atomizing water distribution chamber is smaller than the outer diameter of the atomizing core cylinder; and a series of impact atomizing outlets are evenly distributed in a ring around the lower part of the atomizing core, while a series of atomizing water distribution grooves are evenly distributed in a ring around the side wall of the atomizing core.

[0009] The perfluorohexanone fire extinguisher atomizing nozzle is characterized in that the conical atomizing pipe is a frustum-shaped cavity with a taper of 15-35°, preferably 20-25°, and the length of the conical atomizing pipe is 25-43mm; the straight-tube spray guide pipe is a cylindrical cavity with a length of 15-30mm.

[0010] The aforementioned perfluorohexanone fire extinguisher atomizing nozzle is characterized by having an atomizing manifold volume of 850 mm³. 3 -1950 mm 3 The volume of the conical atomizing pipe is 12435 mm. 3 -21389 mm 3 The volume of the straight-tube injection guide pipe is 10603 mm. 3 -21205 mm 3 The diameter of the cylindrical cavity of the atomizing core groove is 5-9mm, and the height of the cylindrical cavity is 4-10mm; the diameter of the cylindrical atomizing core is 4-9mm, and the height is 3-12mm; the atomizing through hole is a round hole with a diameter of 1-4mm.

[0011] The aforementioned perfluorohexanone fire extinguisher atomizing nozzle is characterized by having an external thread on the connecting pipe and a corresponding internal thread on the atomizing nozzle, with the connecting pipe and the atomizing nozzle being connected by the external and internal threads.

[0012] The method of using a perfluorohexanone fire extinguisher atomizing nozzle is characterized by the following steps:

[0013] 1) Select a suitable perfluorohexanone fire extinguisher and a 2-bromotrifluoropropylene fire extinguisher. The pressure of the fire extinguisher should be 0.8-1.6 MPa, preferably 1.2-1.4 MPa; connect one end of the connecting pipe to the agent outlet of the fire extinguisher.

[0014] 2) Turn on the fire extinguisher switch, spray time: ≥13S.

[0015] The aforementioned perfluorohexanone fire extinguisher-specific atomizing nozzle and its usage method combine the advantages and characteristics of rotary atomizing nozzles, direct-flow atomizing nozzles, and angled nozzles. Its atomizing core and atomizing orifice rapidly atomize the liquid extinguishing agent, ensuring the atomized particle size meets fire extinguishing requirements. This facilitates rapid fire extinguishing in short-distance applications while preventing splashing of the liquid onto the protected object. The tapered diffusion of the conical atomizing pipe ensures effective atomization. The straight-tube structure of the front straight-tube spray guide pipe determines the spray direction. This specialized atomizing nozzle is particularly suitable for perfluorohexanone fire extinguishers and can also be used in fire extinguishers containing liquids such as 2-bromotrifluoropropylene. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the connecting tube of the present invention;

[0018] Figure 3 This is a cross-sectional structural diagram of the connecting pipe of the present invention;

[0019] Figure 4 This is a three-dimensional structural diagram of the atomizing nozzle of the present invention;

[0020] Figure 5 This is a schematic diagram of the two end faces of the drug manifold of the atomizing nozzle of the present invention;

[0021] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure of AA;

[0022] Figure 7 for Figure 5 A schematic diagram of the cross-sectional structure of BB;

[0023] Figure 8 This is a three-dimensional structural diagram of the atomizing core of the present invention;

[0024] Figure 9 This is a schematic diagram of the end face structure of the atomizing core of the present invention;

[0025] Figure 10 This is a side view of the atomizing core of the present invention.

[0026] Figure 11 for Figure 10 Schematic diagram of CC cross-section structure;

[0027] In the diagram: 1-Connecting pipe, 101-Agent delivery pipe, 102-Anti-detachment connector, 103-Agent manifold chamber one, 103a-Transition frustum chamber, 103b-Main cylindrical chamber, 104-External thread; 2-Atomizing nozzle, 201-Agent manifold chamber two, 202-Internal thread, 203-Atomizing core groove, 204-Conical atomizing pipe, 205-Straight injection guide pipe, 206-Atomizing through hole, 207-Atomizing core center hole; 3-Atomizing core, 301-Atomizing water distribution groove, 302-Impact atomizing chamber, 303-Impact atomizing outlet, 304-Atomizing core cylinder, 305-Atomizing core boss, 306-Atomizing water distribution chamber. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] As shown in the figure, this perfluorohexanone fire extinguisher-specific atomizing nozzle includes a connecting pipe 1 and an atomizing nozzle 2. The connecting pipe 1 contains a connected agent delivery pipe 101 and an agent manifold 103. The atomizing nozzle 2 contains, in sequence, a connected agent manifold 201, a conical atomizing pipe 204, and a straight-tube spray guide pipe 205. At least one atomizing core groove 203 is provided at the bottom of the agent manifold 201, and an atomizing through-hole 206 is provided at the bottom of the atomizing core groove 203. An atomizing core 3 is correspondingly arranged within the atomizing core groove 203, and the center of the atomizing core 3 is connected to the agent manifold 201. The atomizing core 3 has an impact atomizing chamber 302, and at least one impact atomizing outlet 303 is provided in the lower part of the atomizing core 3. The bottom of the atomizing core 3 is provided with an atomizing water distribution chamber 306, and the side wall of the atomizing core 3 is provided with an atomizing water distribution groove 301. After the connecting pipe 1 and the atomizing spray pipe 2 are screwed together, the agent manifold 103 and the agent manifold 201 are combined to form an atomizing manifold. The atomizing manifold is connected to the conical atomizing pipe 204 and the straight injection guide pipe 205 through the impact atomizing chamber 302, the impact atomizing outlet 303, the atomizing water distribution groove 301, the atomizing water distribution chamber 306, and the atomizing through hole 206. The atomizing core 3 and atomizing through-hole 206 of this invention can quickly atomize the liquid extinguishing agent, ensuring that the atomized particle size meets the fire extinguishing requirements, which is beneficial for rapid fire extinguishing in short-distance applications, while not causing splashing of the liquid-protected object; the tapered diffusion of the conical atomizing pipe 204 ensures the atomization effect; the straight structure of the front straight-tube spray guide pipe 205 determines the spray guide.

[0030] Preferably, at least one atomizing core central hole 207 is provided at the bottom of the drug manifold 201. The atomizing core central hole 207 is connected to the conical atomizing pipe 204 and the straight-tube injection guide pipe 205 to enhance the atomization effect of the hole.

[0031] Preferably, the outer wall of the connecting pipe 1 corresponding to the agent delivery pipeline 101 is provided with an anti-detachment joint 102. The connecting pipe 1 is connected to the agent outlet of the fire extinguisher through the anti-detachment joint 102, which makes the connection convenient.

[0032] Preferably, the drug manifold 103 is composed of a transition frustum cavity 103a and a main cylindrical cavity 103b. The upper surface of the transition frustum cavity 103a is connected to the drug delivery pipe 101, so as to realize the first drug diffusion and the first impact of atomized particles.

[0033] The number of atomizing cores 3 and corresponding atomizing core grooves 203 can be adjusted according to specific engineering needs. One, two, three, four, or five atomizing core grooves 203 are provided at the bottom of the drug manifold 201, and an atomizing through-hole 206 is provided at the center of the bottom of each atomizing core groove 203. The main structure of the atomizing core 3 is an approximately cylindrical structure, with an atomizing core boss 305 at the top and an atomizing core cylinder 3 below the boss 305. 04. The atomizing core 3 is inserted into the atomizing core groove 203. Its atomizing core boss 305 is engaged with the bottom surface of the drug confluence cavity 201. The atomizing core cylinder 304 is inserted and tightly fitted into the atomizing core groove 203. The outer diameter of the atomizing water distribution cavity 306 is smaller than the outer diameter of the atomizing core cylinder 304. 2-5 impact atomizing outlets 303 are evenly distributed in a ring at the lower part of the atomizing core 3. 2-5 atomizing water distribution grooves 301 are evenly distributed in a ring on the side wall of the atomizing core 3.

[0034] Preferably, the conical atomizing pipe 204 is a frustum-shaped cavity with a taper of 15-35°, preferably 20-25°, and a length of 25-43 mm. The taper of the conical atomizing pipe 204 ensures effective atomization. Furthermore, the straight-tube spray guide pipe 205 is a cylindrical cavity with a length of 15-30 mm, which determines the spray direction, ensuring two-phase gas-liquid spray during fire extinguishing and guaranteeing a columnar spray onto the fire-fighting area. The agent diffuses in the conical atomizing pipe 204, and upon passing through the straight-tube spray guide pipe 205, the agent contracts, resulting in collisions between atomized particles and enhancing the atomization effect.

[0035] Preferably, the volume of the atomizing manifold is 850 mm. 3 -1950 mm 3 The volume of the conical atomizing pipe 204 is 12435 mm. 3 -21389 mm 3 The volume of the straight-tube injection guide pipe 205 is 10603 mm. 3 -21205 mm 3 The diameter of the cylindrical cavity in the atomizing core groove 203 is 5-9 mm, and the height of the cylindrical cavity is 4-10 mm; the diameter of the atomizing core cylinder 304 in the atomizing core 3 is 4-9 mm, and the height is 3-12 mm; the atomizing through hole 206 is a circular hole with a diameter of 1-4 mm. The various volumes, shapes, and sizes of the structure in this invention are directly related to the fire extinguishing effect of the nozzle.

[0036] Preferably, the connecting pipe 1 is provided with an external thread 104, and the atomizing nozzle 2 is provided with an internal thread 202. The connecting pipe 1 and the atomizing nozzle 2 are connected by the external thread 104 and the internal thread 202, which makes installation and use convenient.

[0037] The above-mentioned method of using a perfluorohexanone fire extinguisher atomizing nozzle includes the following steps:

[0038] 1) Select suitable perfluorohexanone fire extinguishers and 2-bromotrifluoropropylene fire extinguishers. The pressure of the fire extinguishers should be 0.8-1.6 MPa, preferably 1.2-1.4 MPa. Under the action of aerodynamics, the droplet size of the fire extinguisher should be optimal. Connect one end of the connecting pipe 1 to the outlet of the fire extinguisher.

[0039] 2) Turn on the fire extinguisher switch, spray time: ≥13S.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should be considered within the scope of protection of the present invention.

Claims

1. A special atomizing nozzle for perfluorohexanone fire extinguishers, characterized in that... The device includes a connecting pipe (1) and an atomizing nozzle (2). The connecting pipe (1) is provided with a connected agent delivery pipe (101) and an agent manifold chamber one (103). The atomizing nozzle (2) is provided with a connected agent manifold chamber two (201), a conical atomizing pipe (204), and a straight-tube injection guide pipe (205). At least one atomizing core groove (203) is provided at the bottom of the agent manifold chamber two (201). An atomizing through hole (206) is provided at the bottom of the atomizing core groove (203). An atomizing core (3) is provided in the atomizing core groove (203). An impact atomizing chamber (302) connected to the agent manifold chamber two (201) is provided at the center of the atomizing core (3). At least one impact atomization outlet (303) is provided in the lower part of the atomizing core (3), an atomization water distribution chamber (306) is provided at the bottom of the atomizing core (3), and an atomization water distribution groove (301) is provided on the side wall of the atomizing core (3); after the connecting pipe (1) and the atomizing spray pipe (2) are screwed together, the agent manifold one (103) and the agent manifold two (201) are combined to form an atomization manifold. The atomization manifold is connected to the conical atomization pipe (204) and the straight injection guide pipe (205) through the impact atomization chamber (302), the impact atomization outlet (303), the atomization water distribution groove (301), the atomization water distribution chamber (306), and the atomization through hole (206). At least one atomizing core center hole (207) is provided at the bottom of the drug manifold two (201). The atomizing core center hole (207) is connected to the conical atomizing pipe (204) and the straight-tube injection guide pipe (205) to enhance the atomization effect of the hole. The drug manifold (103) consists of a transition frustum cavity (103a) and a main cylindrical cavity (103b). The upper surface of the transition frustum cavity (103a) is connected to the drug delivery pipeline (101). The bottom of the drug manifold 2 (201) is provided with one, two, three, four or five atomizing core grooves (203), and the atomizing core groove (203) is provided with an atomizing through hole (206) at the center of the bottom; the main structure of the atomizing core (3) is an approximately cylindrical structure, the top of the atomizing core (3) is provided with an atomizing core boss (305), and the atomizing core cylinder (304) is provided below the atomizing core boss (305). The atomizing core (3) is inserted into the atomizing core groove (206). In 3), the atomizing core boss (305) is engaged with the bottom surface of the drug manifold (201), the atomizing core cylinder (304) is tightly fitted with the atomizing core groove (203), and the outer diameter of the atomizing water distribution chamber (306) is smaller than the outer diameter of the atomizing core cylinder (304); 2-5 impact atomizing outlets (303) are evenly distributed in a ring at the lower part of the atomizing core (3), and 2-5 atomizing water distribution grooves (301) are evenly distributed in a ring on the side wall of the atomizing core (3); The conical atomizing pipe (204) is a frustum-shaped cavity with a taper of 15-35° and a length of 25-43 mm; the straight-tube injection guide pipe (205) is a cylindrical cavity with a length of 15-30 mm.

2. The atomizing nozzle for perfluorohexanone fire extinguishers as described in claim 1, characterized in that... The outer wall of the connecting pipe (1) corresponding to the agent delivery pipeline (101) is provided with an anti-detachment joint (102), and the connecting pipe (1) is connected to the agent outlet of the fire extinguisher through the anti-detachment joint (102).

3. The atomizing nozzle for perfluorohexanone fire extinguishers as described in claim 1, characterized in that... The volume of the atomizing manifold is 850 mm. 3 -1950 mm 3 The volume of the conical atomizing pipe (204) is 12435 mm. 3 -21389 mm 3 The volume of the straight-tube injection guide pipe (205) is 10603 mm. 3 -21205 mm 3 The diameter of the grooved cylindrical cavity of the atomizing core groove (203) is 5-9mm and the height of the grooved cylindrical cavity is 4-10mm; the diameter of the atomizing core cylinder (304) of the atomizing core (3) is 4-9mm and the height is 3-12mm; the atomizing through hole (206) is a round hole with a diameter of 1-4mm.

4. The atomizing nozzle for perfluorohexanone fire extinguishers as described in claim 1, characterized in that... The connecting pipe (1) is provided with an external thread (104), and the atomizing nozzle (2) is provided with an internal thread (202). The connecting pipe (1) and the atomizing nozzle (2) are connected by the external thread (104) and the internal thread (202).

5. The method of using the perfluorohexanone fire extinguisher atomizing nozzle as described in claim 1, characterized in that... Includes the following steps: 1) Select a suitable perfluorohexanone fire extinguisher and a 2-bromotrifluoropropylene fire extinguisher. The pressure of the fire extinguisher is 0.8-1.6 MPa. Connect one end of the connecting pipe (1) to the agent outlet of the fire extinguisher. 2) Turn on the fire extinguisher switch, spray time: ≥13S.

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