Efficient fire extinguishing sprayer

Abstract

The utility model discloses an efficient fire extinguishing spray head which comprises a spray head body, the spray head body is provided with a hollow connecting part and a flowing part extending from the connecting part in the axial direction, a fluid channel is formed in the middle of the flowing part, and a liquid outlet communicated with the fluid channel is formed in the other end of the flowing part. Wherein the outer wall of the flowing part is provided with at least two inclined planes, and side flow ports communicated with the fluid channel are formed in the inclined planes. Through the technical scheme provided by the invention, the effects of improving the atomization rate, increasing the flow of the spray head, shortening the distribution time of the fire extinguishing agent and reducing the required injection pressure are achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of fire extinguishing nozzles for fire extinguishing systems, and in particular to a high-efficiency fire extinguishing nozzle. Background Technology

[0002] Research in the 1980s found that chlorofluorocarbons (CFCs) used in foaming agents, refrigerants, and fire extinguishing agents could damage the atmospheric ozone layer, leading to a global phase-out of CFCs.

[0003] With the restriction and gradual withdrawal of heptafluoropropane extinguishing agents, perfluorohexanone (FK-5-1-12, trade name NOVEC1230) extinguishing agent has been accepted, recognized, and widely used by the international fire protection community. It features low extinguishing concentration, high extinguishing efficiency, high safety factor, non-conductivity, and no residue. Currently, although there are two or three extinguishing agent manufacturers in my country producing perfluorohexanone extinguishing agents, according to international standards, extinguishing agents must undergo actual fire extinguishing tests before being put into use to verify their extinguishing performance. For gaseous extinguishing agents, the core indicator of their extinguishing performance is the extinguishing concentration. If it cannot pass the standard fire extinguishing test and achieve extinguishing at the lowest extinguishing concentration, then the extinguishing agent will not be internationally recognized.

[0004] As is well known, gaseous fire suppression primarily employs the total flooding method. This means that in a space, regardless of the location of the fire, when the extinguishing agent is sprayed into the protected space, it can rapidly diffuse throughout the space, forming a stable extinguishing concentration in each area and extinguishing the fire throughout the entire space. Thus, the higher the vaporization level and vapor pressure of the extinguishing agent, the better its uniform distribution performance.

[0005] Compared to heptafluoropropane, perfluorohexanone has a higher boiling point (heptafluoropropane boils at -16.4℃, while perfluorohexanone boils at 49℃). It is liquid at room temperature, and its vapor pressure is only one-twelfth that of heptafluoropropane (at 20℃, perfluorohexanone vapor pressure is 0.33 bar, while heptafluoropropane vapor pressure is 3.9 bar). Therefore, the uniform distribution performance of perfluorohexanone is more than ten times worse than that of heptafluoropropane. If a nozzle with the same structure as heptafluoropropane is used, the uniform distribution capability of perfluorohexanone will be more than ten times weaker. This can be understood as heptafluoropropane achieving uniform spatial distribution in 10 seconds, while perfluorohexanone requires 100 seconds. With the same nozzle, heptafluoropropane can protect 100 square meters, while perfluorohexanone can only protect 10 square meters. This is why a perfluorohexanone fire suppression system cannot effectively extinguish a fire when using an existing heptafluoropropane nozzle.

[0006] To overcome the shortcomings of existing perfluorohexanone fire extinguishing systems, such as low extinguishing agent atomization rate, small nozzle flow rate, and high required nozzle pressure, this invention provides a high-efficiency fire extinguishing nozzle that not only has a high extinguishing agent atomization rate but also reduces the required nozzle pressure and provides sufficient flow rate, enabling rapid and uniform distribution of the extinguishing agent. Utility Model Content

[0007] One objective of this invention is to provide a high-efficiency fire extinguishing nozzle that improves the atomization rate of the extinguishing agent, reduces the nozzle pressure required for the extinguishing agent, and provides sufficient flow rate.

[0008] To achieve at least one of the above objectives of this utility model, this utility model provides a high-efficiency fire extinguishing nozzle, which includes a nozzle having a hollow connecting portion and a flow portion extending axially from the connecting portion. A fluid channel is formed in the middle of the flow portion, and a liquid outlet communicating with the fluid channel is formed at the other end of the flow portion. At least two inclined surfaces are provided on the outer wall of the flow portion, and a nozzle side flow port communicating with the fluid channel is formed on the inclined surfaces.

[0009] Specifically, the connecting part includes a mounting block and a connecting block. The connecting block and the mounting block are integrally formed. In this embodiment, the mounting block is set as a hexagonal nut with threads on its inner wall. The cross-sectional area of ​​the mounting block is larger than the cross-sectional diameter of the connecting block.

[0010] Using the above method, operators connect the fire extinguishing equipment's cylinder hose to the mounting block via threads to prevent extinguishing agent leakage and pressure loss, ensuring the normal operation of the fire extinguishing equipment. Furthermore, the hexagonal nut has anti-slip threads on its surface, providing a non-slip function. The hexagonal nut also facilitates the connection and locking of the cylinder hose to the nozzle via the nozzle's threaded connection, improving the safety of the fire extinguishing system.

[0011] The hexagonal nut has 30° chamfered ends.

[0012] With the above solution, the two ends of the hexagonal nut are chamfered at 30° to facilitate the use of an auxiliary tool wrench to lock the nozzle connector and the cylinder hose on the hexagonal nut.

[0013] The flow section includes at least two inclined surfaces, and further includes a first inclined surface and a second inclined surface. The inclination angle of the first inclined surface is smaller than that of the second inclined surface. The inclination angle of the first inclined surface is between 20° and 30°, and the inclination angle of the second inclined surface is between 45° and 65°.

[0014] The above scheme, with its two progressively increasing slopes, allows the extinguishing agent to gradually transition from downward kinetic energy to circumferential kinetic energy after entering the fluid channel. This two-stage transition reduces pressure loss during the process. Simultaneously, the spatial compression increases the flow velocity of the extinguishing agent, thus maintaining pressure effectively.

[0015] The high-efficiency fire extinguishing nozzle also includes an orifice plate, which is installed on the inner wall of the connecting block and on the side near the first inclined surface. The orifice plate also has a hole in the center to facilitate the fire extinguishing agent to enter the flow section from the connecting block.

[0016] Through the above scheme, before the extinguishing agent enters the fluid section of the nozzle from the pipeline, it first passes through the orifice plate, undergoing an initial collision to increase the extinguishing agent velocity and atomize it. Then, it enters the fluid channel for a second collision, further increasing the extinguishing agent velocity and atomizing it a second time. This double collision atomization process decomposes the liquid perfluorohexanone into finer droplets, and due to the higher flow rate, the droplet spray distance is increased, significantly improving the atomization rate of perfluorohexanone.

[0017] The nozzle has at least two rows of nozzle side outlets on its two inclined surfaces, and the nozzle side outlets are connected to the fluid channel.

[0018] Through the above solution, the nozzle side outlet is freed from the limitation imposed by the nozzle diameter on the diameter of a single nozzle side outlet. By increasing the diameter of a single nozzle side outlet, a larger spray flow rate is obtained. It also avoids interference between the sprayed extinguishing agents, thus effectively increasing the spray flow rate of the nozzle without reducing the atomization effect.

[0019] Furthermore, the nozzle side outlet is provided with a downward tilt angle. The nozzle side outlet on the first inclined surface is provided with an tilt angle between 0° and 10°, and the nozzle side outlet on the second inclined surface is provided with an tilt angle between 5° and 15°.

[0020] By selecting two different spray angles, the extinguishing agents sprayed from the side outlets of the nozzles on the first and second inclined planes basically do not cross or interfere with each other, avoiding unnecessary collisions that could affect the speed of extinguishing agent vaporization. This not only accelerates the fall of the extinguishing agent but also ensures its rapid and uniform distribution.

[0021] The advantages of this invention are that it has a high atomization rate, requires a low extinguishing agent injection pressure, and has a large nozzle injection flow rate.

[0022] The further objectives and advantages of this utility model will become fully apparent from the following description.

[0023] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description

[0024] Figure 1 A three-dimensional schematic diagram of the high-efficiency fire extinguishing nozzle of this utility model is shown.

[0025] Figure 2 The diagram shows a front view of the high-efficiency fire extinguishing nozzle of this invention.

[0026] Figure 3 A cross-sectional schematic diagram of the high-efficiency fire extinguishing nozzle of this utility model is shown.

[0027] Figure descriptions: 1. Nozzle, 2. Hex nut, 3. Thread, 4. Chamfer, 5. First bevel, 6. Second bevel, 7. Orifice plate, 8. Nozzle side outlet, 9. Fluid channel. Detailed Implementation

[0028] The preferred embodiments described below are merely examples, and other obvious variations will be apparent to those skilled in the art. The basic principles of this invention as defined in the following description can be applied to other implementations, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of this invention.

[0029] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0030] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0031] Refer to the instruction manual. Figures 1 to 2 A preferred embodiment of the present invention, a high-efficiency fire extinguishing nozzle, will be described in detail below:

[0032] The high-efficiency fire extinguishing nozzle includes:

[0033] A nozzle 1 has a hollow connecting portion and a flow portion extending axially from the connecting portion. A fluid channel 9 is formed in the middle of the flow portion, and a liquid outlet communicating with the fluid channel 9 is formed at the other end of the flow portion. The outer wall of the flow portion is provided with at least two inclined surfaces, on which nozzle side outlets 8 communicating with the fluid channel are formed. In this way, the extinguishing agent in the fire extinguisher enters from the connecting portion of the nozzle, passes through the fluid channel, and enters the two inclined surfaces of the flow portion, accelerating the flow velocity of the extinguishing agent.

[0034] Specifically, the connecting part includes an mounting block and a connecting block, which are integrally formed. In this embodiment, the mounting block is set as a hexagonal nut 2, and the inner wall of the hexagonal nut 2 is provided with threads 3. The cross-sectional area of ​​the mounting block is larger than the cross-sectional diameter of the connecting block. In this way, the operator connects the fire extinguishing equipment's cylinder hose to the mounting block through the threads 3, preventing leakage and depressurization of the extinguishing agent and ensuring the normal use of the fire extinguishing equipment.

[0035] It is worth mentioning that the hexagonal nut has anti-slip threads on its surface, which provides an anti-slip function. The hexagonal nut facilitates the connection and locking of the cylinder hose and the nozzle through the nozzle thread, thereby improving the safety of the fire extinguishing system.

[0036] Furthermore, the two ends of the hexagonal nut 2 are chamfered at 30° to facilitate the use of an auxiliary tool wrench to lock the nozzle connecting block and the cylinder hose on the hexagonal nut 2.

[0037] Specifically, the flow section includes at least two inclined surfaces, namely a first inclined surface 5 and a second inclined surface 6. The first inclined surface 5 is connected to the connecting block, and the second inclined surface 6 is connected to the first inclined surface 5 and is located away from the connecting block. The inclination angle of the first inclined surface 5 is smaller than that of the second inclined surface.

[0038] In this embodiment, the inclination angle of the first inclined plane 5 is between 20° and 30°, and the inclination angle of the second inclined plane 6 is between 45° and 65°. This design of two progressively increasing inclination angles allows the extinguishing agent to gradually transition from completely downward kinetic energy to circumferential kinetic energy after entering the fluid channel 9. This two-stage transition reduces pressure loss during the process. At the same time, through a certain degree of spatial compression, the flow velocity of the extinguishing agent is increased, and the pressure is better maintained.

[0039] Specifically, the high-efficiency fire extinguishing nozzle also includes an orifice plate 7, which is installed on the inner wall of the connecting block and on the side close to the first inclined surface 5. The orifice plate 7 also has a fluid channel 9 in the center to facilitate the fire extinguishing agent to enter the flow section from the connecting block.

[0040] Specifically, the extinguishing agent in the fire extinguisher first enters the mounting block of the nozzle, then flows towards the connecting block. Upon reaching the connecting block, it first passes through the orifice plate 7, where it collides with the orifice plate 7, increasing the agent's flow velocity and undergoing a first atomization. Then, it enters the first inclined surface 5 and the second inclined surface 6 of the fluid channel 9, undergoing a second collision, further increasing the agent's flow velocity and undergoing a second atomization. Through these two collisions and atomization processes, the liquid perfluorohexanone decomposes into finer droplets. Furthermore, due to the faster flow velocity, the distance the droplets travel is increased, significantly improving the atomization rate of perfluorohexanone.

[0041] The nozzle has two beveled outer surfaces with nozzle side outlets 8, which are connected to the fluid channel 9. The nozzle side outlets 8 are arranged in at least two layers of staggered arrangement, which eliminates the limitation on the diameter of the nozzle side outlets 8. By increasing the diameter of a single nozzle side outlet 8, a larger jet flow rate can be obtained. In addition, the nozzle side outlets 8 spray in different directions to avoid interference, effectively increasing the jet flow rate of the nozzle 1 without reducing the atomization effect of the nozzle 1.

[0042] Furthermore, the nozzle side outlet 8 is set with a downward tilt angle. The nozzle side outlet 8 on the first inclined surface 5 is set with an tilt angle between 0° and 10°, and the nozzle side outlet 8 on the second inclined surface 6 is set with an tilt angle between 5° and 15°. By setting the spray angles of the nozzle side outlets 8 on the first inclined surface 5 and the second inclined surface 6 to be different, the extinguishing agent sprayed from the nozzle side outlets 8 on the first inclined surface 5 and the second inclined surface 6 basically does not cross interference, avoiding unnecessary collisions and affecting the speed of extinguishing agent vaporization. This not only speeds up the fall of the extinguishing agent, but also ensures the rapid and uniform distribution of the extinguishing agent.

[0043] With this configuration, the high-efficiency fire extinguishing nozzle is connected to the fire extinguishing agent cylinder hose via the thread 3 of the connecting part. When the fire extinguishing agent passes through the nozzle 1, it first undergoes a collision through the orifice plate 7, increasing the flow velocity and atomizing it once. Then, it enters the flow section through the fluid channel 9, undergoing a second collision, further increasing the flow velocity and atomizing it a second time. Finally, it is sprayed out through the nozzle side outlet 8 of the first inclined surface 5 and the second inclined surface 6, greatly increasing the spray flow rate of the high-efficiency fire extinguishing nozzle 1, enhancing the effective uniform distribution of the fire extinguishing agent, and shortening the fire extinguishing time.

[0044] Those skilled in the art should understand that the embodiments of the present invention described above are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the described principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A high efficiency fire suppression sprinkler characterized by, The high-efficiency fire extinguishing nozzle comprises a nozzle head, a connecting part and a flow part, wherein the connecting part is hollow, the flow part extends from the connecting part in the axial direction, the middle part of the flow part forms a fluid channel, the other end of the flow part forms a liquid outlet communicating with the fluid channel, and the outer wall of the flow part is provided with at least two inclined surfaces, and the inclined surfaces form nozzle side flow ports communicating with the fluid channel.

2. The high efficiency fire suppression sprinkler of claim 1, wherein, The connecting part comprises a mounting block and a connecting block, the connecting block is integrally formed with the mounting block, and the mounting block is provided as a hexagonal nut, the inner wall of the hexagonal nut is provided with threads, and the cross-sectional area of the mounting block is larger than the cross-sectional diameter of the connecting block.

3. The high efficiency fire suppression sprinkler of claim 2, wherein, The surface of the hexagonal nut is provided with anti-skid threads.

4. The high efficiency fire suppression sprinkler of claim 2, wherein, The two ends of the hexagonal nut are chamfered by 30°.

5. The high efficiency fire suppression sprinkler of claim 1, wherein, The flow part comprises at least two inclined surfaces, i.e., a first inclined surface and a second inclined surface, the first inclined surface is connected to the connecting block, the second inclined surface is connected to the end of the first inclined surface away from the connecting block, and the inclination angle of the first inclined surface is smaller than that of the second inclined surface.

6. The high efficiency fire sprinkler head of claim 5, wherein, The inclination angle of the first inclined surface is between 20° and 30°, and the inclination angle of the second inclined surface is between 45° and 65°.

7. The high efficiency fire sprinkler head of claim 5, wherein, The two inclined surfaces on the outside of the nozzle head are respectively provided with nozzle side flow ports, and the nozzle side flow ports communicate with the fluid channel.

8. The high efficiency fire sprinkler head of claim 7, wherein, The nozzle side flow ports are provided with a downward inclination angle.

9. The high efficiency fire sprinkler head of claim 8, wherein, The nozzle side flow port provided on the first inclined surface is provided with an inclination angle between 0° and 10°, and the nozzle side flow port provided on the second inclined surface is provided with an inclination angle between 5° and 15°.

10. The high efficiency fire sprinkler head of claim 1, wherein, The high-efficiency fire extinguishing nozzle further comprises a hole plate, the hole plate is installed on the inner wall of the connecting block and close to one side of the first inclined surface, and the center of the hole plate is further provided with a fluid channel.

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