Total flooding fire sprinkler for nitrogen fire extinguishing system

Abstract

The invention provides a total-flooding fire sprinkler for a nitrogen fire extinguishing system, and belongs to the technical field of fire sprinklers, the total-flooding fire sprinkler for the nitrogen fire extinguishing system comprises a sprinkler main body, the sprinkler main body comprises a connecting part and a sprinkler body integrally formed with the connecting part; the main runner is axially arranged along the connecting part and the nozzle body; at least one group of sub-runner components are distributed along the inner cavity wall of the spray head body at intervals, each group of sub-runner components comprises a plurality of sub-runners which penetrate through the spray head body in the circumferential direction of the inner cylindrical surface of the main runner and are diverged outwards, and two groups of sub-runner components are distributed along the inner cavity of the spray head body at intervals; according to the invention, through optimal design of the nozzle, more efficient atomization and rapid diffusion can be realized when nitrogen is released, so that the nitrogen is rapidly and uniformly distributed in a fire space. By means of the design, the nitrogen release efficiency is remarkably improved, rapid oxygen discharging and cooling can be achieved within the shortest time, and therefore the fire extinguishing effect is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire sprinklers, and particularly to a total flooding fire sprinkler for a nitrogen fire extinguishing system. Background Art

[0002] Nitrogen is gaseous at normal temperature and pressure, and has a powerful oxygen displacement ability and the ability to rapidly reduce the temperature of a fire scene, which makes nitrogen an efficient fire extinguishing medium. Traditional nitrogen release methods usually use sprinklers for gas fire extinguishing to achieve rapid release and diffusion. However, when traditional sprinklers release nitrogen, there may be problems such as uneven diffusion or insufficient speed, resulting in the oxygen displacement and temperature reduction effects not being maximized, thus affecting the fire extinguishing efficiency.

[0003] The nozzles for nitrogen release in existing total flooding fire protection devices usually adopt a straight-through spray hole structure. Although these types of nozzles consider the nitrogen injection rate and a certain spray angle, due to the relatively large diameter of the spray holes and the lack of an optimized spray angle structure at the nozzle outlet, the nitrogen ejected is mostly in a thin columnar shape and mainly relies on the space temperature to achieve the diffusion of nitrogen. This release method results in a slow nitrogen diffusion speed, unable to rapidly reduce the temperature of the fire scene in a short time, and may also cause uneven nitrogen distribution, affecting the fire extinguishing efficiency. Summary of the Invention

[0004] The present invention provides a total flooding fire sprinkler for a nitrogen fire extinguishing system. Through optimized design, this sprinkler can achieve more efficient atomization and rapid diffusion when releasing nitrogen, enabling nitrogen to be quickly and evenly distributed into the fire space. This design significantly improves the nitrogen release efficiency, can achieve rapid oxygen displacement and temperature reduction in the shortest time, thereby effectively enhancing the fire extinguishing effect. In addition, the optimized sprinkler structure avoids the problem of uneven nitrogen distribution that may exist in traditional sprinklers, providing more efficient technical support for the application of nitrogen fire protection devices in different fire scenarios.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A total flooding fire sprinkler for a nitrogen fire extinguishing system, comprising:

[0007] A sprinkler body, the sprinkler body includes a connecting portion and a sprinkler head body integrally formed with the connecting portion;

[0008] A main flow channel, the main flow channel is arranged along the axial direction of the connecting portion and the sprinkler head body; and

[0009] A sub-flow channel assembly, the sub-flow channel assembly is provided with at least one group spaced along the inner cavity wall of the sprinkler head body, and each group of sub-flow channel assemblies includes a plurality of sub-flow channels that penetrate the sprinkler head body circumferentially along the inner cylindrical surface of the main flow channel and diverge outward.

[0010] Preferably, the sub-channel components are arranged in two groups spaced apart along the inner cavity of the nozzle body.

[0011] Preferably, the sub-channels in each group of the sub-channel components are arranged in the same plane perpendicular to the axis of the main channel.

[0012] Preferably, the axis of the sub-channel is tangent to the inner cylindrical surface of the main channel.

[0013] Preferably, the sub-channel horizontally penetrates through the nozzle body.

[0014] Preferably, the sub-channel includes a sub-channel opening communicating with the inner cylindrical surface of the main channel and a nozzle opening provided at one end of the sub-channel away from the main channel and located on the outer side wall of the nozzle body.

[0015] Preferably, the inner diameter of the nozzle gradually expands in the direction away from the main channel.

[0016] Preferably, the total flooding fire sprinkler for the nitrogen fire extinguishing system further includes a sealing assembly provided between the connecting portion and the pipeline. The sealing assembly includes a docking portion, a sealing ring provided on the side wall of the connecting portion and the end of the pipeline, and a sealing portion provided around the connecting portion and the pipeline.

[0017] Preferably, the docking portion includes a docking groove opened on one side of the pipeline close to the connecting portion and adapted to the end face of the connecting portion.

[0018] Preferably, the sealing portion includes semi-cylinders symmetrically arranged along the outer side in the radial direction of the connecting portion and a sealing cylinder provided on the outer walls of the pipeline and the semi-cylinders. When the semi-cylinders are buckled on the outer wall of the connecting portion, the inner side wall of the semi-cylinders is attached to the outer wall of the end of the pipeline, and the sealing cylinder can move along the outer wall of the pipeline to be fixedly attached to the outer side walls of the semi-cylinders and the pipeline.

[0019] From the above technical solutions, it can be seen that the present invention has the following beneficial effects:

[0020] 1. In the present invention, the fire sprinkler includes a sprinkler body, and the sprinkler body includes a connecting portion and a nozzle body. A plurality of groups of sub-channel components penetrating through the nozzle body are provided on the inner side wall of the nozzle body. The sub-channel components include a number of sub-channels diverging outward from the inner cylindrical surface of the main channel. A sub-channel opening is provided on one side of the sub-channel close to the main channel, and a nozzle opening is provided on the side away from the main channel. When nitrogen is conveyed into the sub-channel through the main channel, it will be extruded from the sub-channel and sprayed out along the conical structure at the nozzle opening, so that the nitrogen forms a uniformly distributed conical shape, and the nitrogen is diffused in the space. The nitrogen gasifies more fully as the distance from the nozzle opening increases, so that the nitrogen contacts the space more fully, strengthening the oxygen discharge speed and the cooling speed, and can extinguish fires more efficiently.

[0021] 2. In the present invention, since a plurality of nozzles are evenly distributed on the nozzle head, and the front end of the nozzle gradually expands after connecting to the sub-channel to form a conical structure, the nitrogen gas ejected from these nozzles forms a certain rotational effect in space, making the nitrogen gas contact the space more fully and further improving the fire extinguishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of one embodiment of the present invention;

[0023] Figure 2 is Figure 1 a sectional view along the plane where the sub-channel is located in

[0024] Figure 3 is a schematic structural diagram of the second embodiment of the present invention;

[0025] Figure 4 is Figure 3 a schematic diagram of the A-A section in

[0026] Figure 5 is Figure 3 a schematic diagram of the B-B section in

[0027] Figure 6 is a schematic structural diagram of the present invention including a sealing assembly;

[0028] Figure 7 is Figure 6 an exploded view of

[0029] Figure 8 is Figure 6 a sectional view of

[0030] Figure 9 is a schematic structural diagram of the connection between the semi-cylinder and the sealing cylinder.

[0031] In the figure: 10, nozzle body; 110, connecting part; 111, guiding inclined surface; 120, nozzle head body; 20, main channel; 310, sub-channel; 311, sub-channel opening; 312, nozzle; 410, docking groove; 420, sealing ring; 431, semi-cylinder; 432, sealing cylinder; 433, fan-shaped piece; 434, first conical inclined surface; 435, second conical inclined surface; 50, pipeline. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] The following is a detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.

[0033] To achieve the above object, the embodiments of the present invention adopt the following technical solutions: Refer to Figure 1 、 Figure 2, A total flooding fire sprinkler for a nitrogen fire extinguishing system, comprising a sprinkler head body 10, a main flow channel 20 and a sub-flow channel assembly. Further, the sprinkler head body 10 includes a connecting portion 110 and a sprinkler head body 120 integrally formed with the connecting portion. The connecting portion 110 is a section of circular pipe. During use, an external thread can be provided on the outer wall of the connecting portion to connect with the pipe for transporting nitrogen, playing a role in fixing the fire sprinkler and sealing. The connecting portion and the sprinkler head body are made of corrosion-resistant metals such as copper and stainless steel, or can also be made of non-metallic materials resistant to low temperature and high temperature, and its lower end is closed; the main flow channel 20 is axially provided along the connecting portion 110 and the sprinkler head body 120. The main flow channel 20 is a smooth cylindrical structure inside, and the bottom is a conical structure or a hemispherical structure. The main flow channel 20 is used to store the nitrogen transported through the pipe in the sprinkler head; the diameter of the main flow channel can be designed according to the total flow rate of the nitrogen for fire extinguishing. The sub-flow channel assembly is set to at least one group, and the sub-flow channel assemblies are spaced along the inner cavity wall of the sprinkler head body. Each group of sub-flow channel assemblies includes a number of sub-flow channels 310. The number of sub-flow channels 310 is circumferentially distributed along the inner cylindrical surface of the main flow channel 20, and the sub-flow channels penetrate through the sprinkler head body and diverge outward. In this way, after the nitrogen entering the main flow channel forms a certain pressure, it can flow into the sub-flow channels and be ejected outward through the sub-flow channels.

[0034] Further, the sub-flow channels 310 in each group of sub-flow channel assemblies are arranged in the same plane perpendicular to the axis of the main flow channel 20. In this way, when the nitrogen is ejected outward through the sub-flow channels 310, it can ensure that the ejected nitrogen is ejected outward along the same spatial plane. At this time, the ejected nitrogen has a certain rotation efficiency, enabling the nitrogen to fully contact the surrounding air in the space.

[0035] Further, the sub-flow channel 310 is a smooth cylindrical structure inside, its axis is tangent to the inner cylindrical surface of the main flow channel, and it is horizontally arranged through the sprinkler head body. The number and diameter of the sub-flow channels can be designed according to the flow rate of the nitrogen for fire extinguishing.

[0036] Further, the sub-flow channel includes a sub-flow channel opening 311 and a spray opening 312. The sub-flow channel opening 311 is connected to the inner cylindrical surface of the main flow channel 20, and the sub-flow channel 310 is tangent to the inner cylindrical surface of the main flow channel 20 through the sub-flow channel opening 311, serving as the inlet for the nitrogen in the main flow channel 20 to flow into the sub-flow channel 310. The spray opening 312 is arranged at one end of the sub-flow channel away from the main flow channel, and the spray opening 312 is located on the outer side wall of the sprinkler head body 120. The function of the spray opening 312 is to release the nitrogen from the sprinkler head. At the same time, the front end of the spray opening is gradually enlarged after connecting to the sub-flow channel 310 to form a conical structure. The cone angle size of this conical structure can be determined according to the nitrogen spraying distance and coverage range.

[0037] Refer to Figure 3 、 Figure 4 、 Figure 5, in some embodiments, the sub-channel components are arranged in two groups at intervals along the inner cavity of the nozzle body. In this way, multiple sub-channels can be formed on the inner wall of the nozzle body by using the aforementioned sub-channel components. When nitrogen is ejected outward from these sub-channels, the nitrogen can be evenly dispersed in the surrounding space, so as to improve the oxygen discharge speed and the cooling speed and achieve efficient fire extinguishing.

[0038] It should be noted that when the sub-channel components are arranged in two groups, the tangent directions of the nozzles 312 on the two layers of sub-channels with the cylindrical surface of the main channel 20 are opposite (that is, one layer is tangent clockwise and the other layer is tangent counterclockwise), and the ejection directions of the nozzles 312 intersect. The distance between the two layers of nozzles 312 can be adjusted according to the size of the ejection angle so that the ejected nitrogen forms a tight liquid-gas between the two layers of nozzles.

[0039] During use, when the nitrogen fire extinguishing device releases nitrogen to extinguish the fire, the nitrogen enters the main channel 20 of the nozzle through the fire extinguishing agent delivery pipeline under a certain pressure. Since a plurality of uniformly distributed sub-channels 310 are horizontally arranged along the tangent direction on the side wall of the cylindrical surface in the main channel 20, the nitrogen is extruded from these sub-channels out of the nozzle and ejected along the conical structure at the nozzle 312, so that the nitrogen forms a uniformly distributed conical shape and the nitrogen is diffused in the space. The nitrogen gasifies more fully as the distance from the nozzle 312 increases. Since a plurality of nozzles 312 are uniformly distributed on the nozzle, the nitrogen ejected from these nozzles forms a certain rotational effect in the space, and the nitrogen contacts the space more fully, strengthening the oxygen discharge speed and the cooling speed, and can extinguish the fire more efficiently.

[0040] Refer to Figure 6 、 Figure 7 , in some other embodiments, since the connection part is usually threadedly connected to the pipeline in the prior art, when the fire sprinkler is in a complex fire fighting scenario, the threaded connection part between the connection part 110 and the pipeline 50 is easily corroded, which affects the effective connection between the two, and further causes the connection part between the two to fail and cannot meet the requirements of convenient disassembly and assembly. In order to avoid the adverse effects brought by the threaded connection between the connection part 110 and the pipeline 50. The fire sprinkler in this embodiment further includes a sealing component arranged between the connection part and the pipeline. Further, the sealing component includes a docking part, a sealing ring 420 and a sealing part. The sealing ring 420 is arranged between the side wall of the connection part 110 and the end of the pipeline 50, and the sealing part is arranged on the periphery of the connection part 110 and the pipeline 50. During use, when the end of the connection part 110 is docked with the end of the pipeline 50, the sealing ring 420 can be sleeved on the outer wall of the connection part 110. The inner side wall of the sealing ring fits with the outer wall of the connection part 110, and at the same time, one side wall of the sealing ring 420 fits with the end of the pipeline 50. After the sealing ring 420 is assembled, the sealing part can be sleeved on the outer walls of the connection part 110 and the pipeline 50 to seal and fix the connection part and the pipeline by using the sealing part.

[0041] Further, referring to Figure 8 , the docking portion includes a docking groove 410 formed on one side of the pipeline close to the connecting portion. At the same time, the docking groove is adapted to the end face of the connecting portion 110. It should be noted that the docking groove 410 is an annular groove formed on the inner side of the end of the pipeline 50. The size of the annular groove matches the outer wall of the connecting portion 110, which facilitates the docking of the connecting portion and the pipeline 50. It should be noted that in order to facilitate the smooth entry of nitrogen in the pipeline into the main flow channel in the connecting portion, a diversion inclined surface 111 is provided on the inner side of the end of the connecting portion, and the diversion inclined surface is used to smoothly transport nitrogen.

[0042] Further, referring to Figure 9 , the sealing portion includes a semi-cylinder 431 and a sealing cylinder 432. Specifically, in this embodiment, there are two opposite semi-cylinders, and the two semi-cylinders are symmetrically arranged along the radial outer side of the connecting portion. After the two semi-cylinders are docked, they can form an approximate complete cylindrical structure, and the cylindrical structure is used to cover the outer sides of the connecting portion 110 and the pipeline 50. The sealing cylinder 432 is arranged on the outer walls of the pipeline and the semi-cylinder 431 to fix and limit the docked semi-cylinder. In addition, in order to limit and fix the side of the sealing ring away from the pipeline, a sector piece 433 is fixedly provided at one end of one side of the semi-cylinder. In this way, when the two semi-cylinders 431 are docked, an approximate annular limiting piece can be formed by the sector piece, and the limiting piece can limit the sealing ring 420 from both sides in combination with the end of the pipeline 50. During use, the end of the connecting portion 110 is docked in the docking groove 410 of the pipeline, and the cylindrical structure formed by buckling the two semi-cylinders 431 is placed on the outer wall of the connecting portion 110. Then, the cylindrical structure is moved towards the connection part of the connecting portion 110 and the pipeline 50, so that the sector piece 433 on the semi-cylinder abuts against one side of the sealing ring 420. At this time, the inner side wall of the semi-cylinder 431 is attached to the outer wall of the end of the pipeline 50. Subsequently, the sealing cylinder 432 moves along the outer wall of the pipeline and is finally fixedly attached to the outer side walls of the semi-cylinder and the pipeline.

[0043] Further, referring to Figure 8 , in order to realize the fitting of the semi-cylinder 431 and the sealing cylinder 432, a first conical inclined surface 434 is provided on the outer side wall of the semi-cylinder. Correspondingly, a second conical inclined surface 435 that matches is provided on the inner side wall of the sealing cylinder. At the same time, in order to realize the stable connection of the sealing cylinder and the pipeline, a matching thread is provided on the inner side of the sealing cylinder and the outer wall of the pipeline. During use, after the semi-cylinder 431 is attached and fixed to the outer wall of the pipeline 50, the sealing cylinder 432 can be rotated to make the sealing cylinder move towards the semi-cylinder 431. At this time, the sealing cylinder screws into the pipeline 50 and finally makes the sealing cylinder fit with the semi-cylinder.

[0044] It should be noted that before the nozzle is connected to the pipeline 50, the sealing cylinder 432 is first threadedly connected to the pipeline, and the sealing cylinder is located inside the pipeline to leave an installation space for the connection between the nozzle and the pipeline. After the connecting portion 110, the pipeline 50, and the half cylinder 431 are connected, the final assembly connection can be achieved by screwing the sealing cylinder 432 into the half cylinder.

[0045] In this embodiment, the half cylinder 321 is used to connect the connecting portion 110 and the pipeline 50, and the sealing cylinder 432 is used to connect the half cylinder 431 and the pipeline 50, abandoning the traditional direct threaded connection method between the nozzle and the pipeline, reducing the risk of failure of the connection part between the nozzle and the pipeline. In addition, by setting the threaded connection method between the sealing cylinder and the pipeline, when the connection part fails, only the sealing cylinder needs to be damaged, avoiding damage to the nozzle and the pipeline.

[0046] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A total flooding fire sprinkler for a nitrogen fire extinguishing system, characterized in that, Comprising: A nozzle body, the nozzle body including a connecting portion and a nozzle body integrally formed with the connecting portion; A main flow channel, the main flow channel being arranged along the axial direction of the connecting portion and the nozzle body; and A sub-flow channel assembly, the sub-flow channel assembly being provided as at least one group spaced along the inner cavity wall of the nozzle body, and each group of sub-flow channel assemblies including a plurality of sub-flow channels that penetrate through the nozzle body circumferentially along the inner cylindrical surface of the main flow channel and diverge outward.

2. The total flooding fire sprinkler for a nitrogen fire extinguishing system according to claim 1, wherein, The sub-flow channel assembly is provided as two groups spaced along the inner cavity of the nozzle body.

3. The total flooding fire sprinkler for a nitrogen fire extinguishing system according to claim 2, characterized in that, The sub-flow channels in each group of sub-flow channel assemblies are arranged in the same plane perpendicular to the axis of the main flow channel.

4. The total flooding fire sprinkler for nitrogen fire extinguishing system according to claim 3, characterized in that, The axis of the sub-flow channel is tangent to the inner cylindrical surface of the main flow channel.

5. The total flooding fire sprinkler for nitrogen fire extinguishing system according to claim 4, characterized in that, The sub-flow channel horizontally penetrates through the nozzle body.

6. The total flooding fire sprinkler for a nitrogen fire extinguishing system according to claim 5, characterized in that, The sub-flow channel includes a sub-flow port communicating with the inner cylindrical surface of the main flow channel and a nozzle port provided at the end of the sub-flow channel away from the main flow channel and located on the outer side wall of the nozzle body.

7. The total flooding fire sprinkler for a nitrogen fire extinguishing system according to claim 6, characterized in that, The inner diameter of the nozzle gradually expands in the direction away from the main flow channel.

8. The total flooding fire sprinkler for a nitrogen fire extinguishing system according to claim 1, characterized in that, The total flooding fire sprinkler for a nitrogen fire extinguishing system further includes a sealing assembly provided between the connecting portion and the pipeline, and the sealing assembly includes a docking portion, a sealing ring provided on the side wall of the connecting portion and the end of the pipeline, and a sealing portion provided on the periphery of the connecting portion and the pipeline.

9. The total flooding fire sprinkler for a nitrogen fire extinguishing system according to claim 8, characterized in that, The docking portion includes a docking groove opened on the side of the pipeline close to the connecting portion and adapted to the end face of the connecting portion.

10. The total flooding fire sprinkler for a nitrogen fire extinguishing system according to claim 9, characterized in that, The sealing portion includes semi-cylinders symmetrically arranged along the radial outer side of the connecting portion and a sealing cylinder provided on the outer walls of the pipeline and the semi-cylinders. When the semi-cylinders are buckled on the outer wall of the connecting portion, the inner side wall of the semi-cylinders fits with the outer wall of the pipeline end, and the sealing cylinder can move along the outer wall of the pipeline to be fixedly fitted to the outer side walls of the semi-cylinders and the pipeline.

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