Spray head for nitrogen fire extinguishing system

Abstract

The invention provides a spray head for a nitrogen fire extinguishing system, and belongs to the technical field of fire-fighting spray heads, the spray head for the nitrogen fire extinguishing system comprises a spray head body, and a liquid inlet cavity, a confluence cavity, a flower core cavity, a rotational flow cavity and a nozzle are sequentially formed in the inner side of the spray head body in the medium flowing direction; the flower core is arranged on the inner wall of the flower core cavity and used for distributing media entering the flower core cavity and then conveying the media backwards in the axial direction inclined to the flower core cavity, and the flower core comprises a flow distribution plate, flow guide plate assemblies arranged from the two opposite side walls of the flow distribution plate in the axial direction inclined to the flower core cavity and drainage grooves formed in the flow guide plate assemblies and distributed in the axial direction inclined to the flower core cavity. The nozzle body comprises a mounting part and a spraying part integrally formed with the mounting part; nitrogen is condensed into a local cone shape through an optimized injection structure, so that the coverage range and effectiveness of gas are improved in the fire extinguishing process, it is ensured that the nitrogen can rapidly and evenly cover a fire source area, and the more efficient fire extinguishing effect is achieved.

Description

Technical Field

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

[0002] In the design of local application sprinklers, the goal is to form a local conical envelope by the condensed injection of nitrogen. Traditional sprinklers often have problems such as uneven injection and poor diffusion during the gas injection process, resulting in low fire extinguishing efficiency. Especially in cases where precise control of the gas release area is required, the above problems are more prominent. The existing local sprinkler designs generally adopt the traditional direct injection structure of spray holes, which cannot effectively adjust the gas injection angle and speed, resulting in the gas diffusion area being too wide or too limited, and unable to achieve precise local fire extinguishing effects. Especially when dealing with high-temperature fire sources or small fire areas, the existing designs often fail to fully utilize the condensation ability of nitrogen and fail to optimize the injection direction and injection pattern. Summary of the Invention

[0003] The present invention provides a sprinkler for a nitrogen fire extinguishing system, which condenses nitrogen into a local conical shape through an optimized injection structure, thereby improving the gas coverage and effectiveness during the fire extinguishing process, ensuring that nitrogen can quickly and evenly cover the fire source area, and achieving a more efficient fire extinguishing effect.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A sprinkler for a nitrogen fire extinguishing system, comprising:

[0006] A sprinkler body, along the direction of medium flow, an inlet liquid cavity, a confluence cavity, a core cavity, a swirl cavity and a nozzle are sequentially arranged inside the sprinkler body; and

[0007] A core, the core is arranged on the inner wall of the core cavity, and is used for splitting the medium entering the core cavity and then conveying it backward at an angle inclined to the axial direction of the core cavity. Wherein, the core includes a splitter plate, a deflector assembly arranged on two opposite side walls of the splitter plate at an angle inclined to the axial direction of the core cavity, and drainage grooves opened on the deflector assembly and distributed at an angle inclined to the axial direction of the core cavity.

[0008] Preferably, the sprinkler body includes a mounting part and a spraying part integrally formed with the mounting part, and the outer wall of the mounting part is provided with a mounting thread.

[0009] Preferably, the inlet liquid cavity is arranged on the inner side wall of the mounting part, and the bottom end of the inlet liquid cavity extends into the spraying part of the sprinkler.

[0010] Preferably, the confluence cavity is a cavity structure that gradually shrinks from the inlet liquid cavity and extends towards the spraying part.

[0011] Preferably, the flower core cavity is arranged at one end of the confluence cavity away from the liquid inlet cavity.

[0012] Preferably, the swirl cavity is arranged at one end of the flower core cavity away from the confluence cavity, and the inner diameter of the swirl cavity is smaller than the inner diameter of the flower core cavity.

[0013] Preferably, the nozzle includes a spray inner angle that extends in a tapered manner from the swirl cavity to the outside of the spray part, a spray channel that extends with an equal diameter from the spray inner angle to the outside, and a spray outer angle that extends in a tapered manner from the spray channel to the outside.

[0014] Preferably, the flow dividing plate is a rhombic plate, and the rhombic plate is arranged in the axial direction of the flower core cavity.

[0015] Preferably, the flow guiding plate assembly includes a first flow guiding plate that starts from one side wall of the flow dividing plate and is in contact with the inner wall of the flower core cavity and extends vertically outward to fit the inner wall of the flower core cavity, and a second flow guiding plate that starts from the other side wall of the flow dividing plate and is in contact with the inner wall of the flower core cavity and extends vertically outward to fit the inner wall of the flower core cavity. The inclined surfaces of the first flow guiding plate and the second flow guiding plate face the medium conveying direction.

[0016] Preferably, the drainage groove penetrates through the first flow guiding plate and / or the second flow guiding plate.

[0017] From the above technical solutions, it can be seen that the present invention has the following beneficial effects:

[0018] 1. In the present invention, the flow guiding plate assembly is distributed along both side walls of the flow dividing plate, so that a guiding structure can be formed for the conveyed nitrogen on both sides of the flow dividing plate, so as to realize the conveyance of the two airflows formed by the flow division of the flow dividing plate into the inside of the nozzle body in a direction inclined to the axial direction of the flower core cavity. In this way, the two airflows can be dispersed under the obstruction of the inner wall of the flower core cavity and the flow guiding plate assembly, and continue to be conveyed backward through the drainage grooves on the flow guiding plate assembly. Since the drainage grooves are also arranged inclined to the axial direction of the flower core cavity, the nitrogen discharged through the drainage grooves will be obstructed by the inner walls of the flower core cavity on both sides, so as to realize the further diffusion of nitrogen. The diffused nitrogen finally sprays out of the nozzle body through the nozzle, realizing the condensed spraying of nitrogen, so that the gas can quickly form a local cone envelope after spraying, enhancing the concentration and efficiency of fire extinguishing.

[0019] 2. In the present invention, the flower core includes a flow splitting plate, a flow guiding plate assembly, and a drainage groove provided on the flow guiding plate assembly. The flow guiding plate assembly includes a first flow guiding plate and a second flow guiding plate arranged oppositely. After the nitrogen is split by the flow splitting plate, it moves in two directions respectively towards the first flow guiding plate and the second flow guiding plate on both sides. Under the guiding and obstructing action of the inclined flow guiding plates, the transported nitrogen is dispersed, and then is transported backward through the drainage groove. Since the drainage groove is also inclined, the drainage groove can transport the nitrogen transported backward in an oblique manner to contact the swirl chamber. After being obstructed by the swirl chamber, the two airflows on both sides can cross and transport each other, so as to further disperse the transported nitrogen and achieve the nitrogen swirling spraying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the nozzle of the present invention;

[0021] Figure 2 is Figure 1 the top view of;

[0022] Figure 3 is Figure 1 the schematic structural diagram of removing the flower core;

[0023] Figure 4 is the three-dimensional schematic diagram of the flower core;

[0024] Figure 5 is the side view of the flower core;

[0025] Figure 6 is the top view of the flower core.

[0026] In the figure: 10, nozzle body; 110, installation part; 111, installation thread; 120, spraying part; 20, flower core; 210, flow splitting plate; 220, flow guiding plate assembly; 221, first flow guiding plate; 222, second flow guiding plate; 230, drainage groove; 30, liquid inlet cavity; 40, confluence cavity; 50, flower core cavity; 60, swirl chamber; 70, nozzle; 710, spraying inner angle; 720, spraying channel; 730, spraying outer angle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following is a detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.

[0028] To achieve the above object, the embodiments of the present invention adopt the following technical solutions: Refer to Figure 1 , Figure 2, A nozzle for a nitrogen fire extinguishing system, comprising a nozzle body 10 and a core 20. Among them, along the medium flow direction, an inlet liquid cavity 30, a confluence cavity 40, a core cavity 50, a swirl cavity 60 and a nozzle 70 are successively arranged inside the nozzle body 10. The core 20 is arranged on the inner wall of the core cavity 50 and is located on the axis of the core cavity. This core is used to divide the medium entering the core cavity and then transport it backward at an angle inclined to the axis of the core cavity. Further, the medium in this embodiment is nitrogen. The core 20 includes a flow splitting plate 210, a flow guiding plate assembly 220 and a drainage groove 230. The flow guiding plate assembly 220 is arranged on two opposite side walls of the flow splitting plate at an angle inclined to the axis of the core cavity 50. The drainage groove 230 is opened on the flow guiding plate assembly, and this drainage groove is also distributed at an angle inclined to the axis of the core cavity. Specifically, the flow guiding plate assembly 220 in this embodiment is distributed along both side walls of the flow splitting plate 210, so that a guiding structure can be formed for the transported nitrogen on both sides of the flow splitting plate, so as to realize the transportation of the two airflows formed by the flow splitting of the flow splitting plate 210 into the inside of the nozzle body 10 at an angle inclined to the axis of the core cavity 50. In this way, the two airflows can be broken up under the blocking action of the inner wall of the core cavity 50 and the flow guiding plate assembly 220, and continue to be transported backward through the drainage groove on the flow guiding plate assembly. Since the drainage groove is also arranged at an angle inclined to the axis of the core cavity, the nitrogen discharged through the drainage groove 230 will be blocked by the inner walls of the core cavity 50 on both sides, so as to realize the further diffusion of nitrogen. The diffused nitrogen finally sprays out of the nozzle body 10 through the nozzle 70, realizing the concentrated spraying of nitrogen, so that the gas can quickly form a local cone envelope after spraying, enhancing the concentration and efficiency of fire extinguishing.

[0029] Referring to Figure 1 , As a preferred technical solution of this embodiment, the nozzle body 10 includes a mounting portion 110 and a spraying portion 120 integrally formed with the mounting portion. In order to facilitate the connection of this nozzle to an external nitrogen source, a mounting thread 111 is provided on the outer wall of the mounting portion. During use, the nozzle is fixedly connected to an external pipeline through the mounting thread on the mounting portion 110.

[0030] Further, referring to Figure 3 , The inlet liquid cavity 30 is arranged on the inner side wall of the mounting portion 110, and the bottom end of the inlet liquid cavity 30 extends into the spraying portion 120 of the nozzle. The confluence cavity 40 is a cavity structure that gradually shrinks from the inlet liquid cavity and extends towards the spraying portion 120. The core cavity 50 is arranged at one end of the confluence cavity 40 away from the inlet liquid cavity 30. The swirl cavity 60 is arranged at one end of the core cavity 50 away from the confluence cavity 40, and the inner diameter of the swirl cavity is smaller than the inner diameter of the core cavity;

[0031] Referring to Figure 3, the nozzle 70 includes a spray inner angle 710, a spray channel 720, and a spray outer angle 730. The spray inner angle 710 extends in a tapered manner from the swirl chamber 60 to the outside of the spray portion 120. The spray channel 720 extends with an equal diameter from the spray inner angle 710 to the outside. The spray outer angle 730 extends in a gradually expanding manner from the spray channel to the outside. In this way, nitrogen enters the nozzle body 10 through the liquid inlet chamber 30. When passing through the confluence chamber, due to the small space of the confluence chamber, the passing nitrogen will be delivered to the flower core chamber 50 at a relatively high pressure. After being shunted, guided, and dispersed by the deflector assembly 220, it enters the swirl chamber 60 in the direction of rotational transportation, so as to facilitate the rapid diffusion of nitrogen after ejection. The nitrogen transported through the swirl chamber enters the nozzle 70, is transported along the spray channel 720 after the pressurization of the spray inner angle, and finally is ejected from the nozzle body in a swirling manner through the spray outer angle. Since the spray outer angle is in a horn shape, the nitrogen ejected from the spray outer angle will form a local conical air flow, so that the gas can quickly form a local conical envelope after ejection, enhancing the concentration and efficiency of fire extinguishing.

[0032] Refer to Figure 4 , Figure 5 , Figure 6 , in some embodiments, the shunt plate 210 is a rhombic plate, and the rhombic plate is arranged in the axial direction of the flower core chamber 50. The deflector assembly 220 includes a first deflector 221 and a second deflector 222. The first deflector 221 and the second deflector 222 are arranged in a centrosymmetric form. Specifically, the first deflector 221 starts from one side wall of the shunt plate 210 and the end in contact with the inner wall of the flower core chamber 50, and extends outward in a direction perpendicular to the shunt plate 210 until it fits with the inner wall of the flower core chamber; the second deflector 222 starts from the other side wall of the shunt plate 210 and the other end in contact with the inner wall of the flower core chamber 50, and extends outward in a direction perpendicular to the shunt plate until it fits with the inner wall of the flower core chamber, and the inclined surfaces of the first deflector 221 and the second deflector 222 are arranged facing the medium transportation direction. In this way, the nitrogen transported through the liquid inlet chamber 30 is separated into two air flows by the shunt plate 210. One of the air flows located on one side of the shunt plate moves along the inner wall space between the first deflector 221 and the flower core chamber 50. Since the inclined surface of the first deflector 221 faces upward, that is, towards the nitrogen transportation direction, this air flow will first contact the first deflector and be hindered by the first deflector to achieve the preliminary dispersion of this air flow. The preliminarily dispersed air flow is transported backward through the drainage groove 230. Since the drainage groove is also inclined, this air flow will contact the inner wall of the swirl chamber 60 in an inclined manner to achieve the secondary dispersion of this air flow; similarly, the other air flow located on the other side of the shunt plate will be transported along the second deflector 222 and the drainage groove 230 in the same way as the aforementioned air flow, and has the same technical effect as the aforementioned air flow.

[0033] It should be noted that since the first deflector 221 and the second deflector 222 are arranged correspondingly along both sides of the splitter plate, the output ends of the drainage grooves are correspondingly distributed in a crossed manner. In this way, the above two airflows discharged from the drainage grooves 230 will cross, mix and disperse again, thereby further improving the swirling and mixing effect of nitrogen, so that the nitrogen discharged from the swirl chamber 60 can have an enhanced jetting effect.

[0034] Furthermore, the drainage groove 230 is arranged through the first deflector 221 and / or the second deflector 222, that is, the drainage groove can be arranged on the first deflector, or on the second deflector, or on both the first deflector and the second deflector. Specifically in this embodiment, drainage grooves are arranged on both the first deflector and the second deflector to enhance the effect of swirling and transporting nitrogen.

[0035] The above-described embodiments are merely 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 sprinkler for a nitrogen fire extinguishing system, characterized in that, Comprising: A nozzle body, along the direction of medium flow, an inlet liquid cavity, a confluence cavity, a core cavity, a swirl cavity and a nozzle are sequentially formed inside the nozzle body; And A core, the core is arranged on the inner wall of the core cavity, and is used for diverting the medium entering the core cavity and then conveying it backward at an angle inclined to the axial direction of the core cavity. Among them, the core includes a diversion plate, a diversion plate assembly arranged on two opposite side walls of the diversion plate at an angle inclined to the axial direction of the core cavity, and a drainage groove formed on the diversion plate assembly and distributed at an angle inclined to the axial direction of the core cavity.

2. The nozzle for a nitrogen fire extinguishing system according to claim 1, characterized in that, The nozzle body includes a mounting portion and a spraying portion integrally formed with the mounting portion, and a mounting thread is provided on the outer wall of the mounting portion.

3. The nozzle for a nitrogen fire extinguishing system according to claim 1, characterized in that, The inlet liquid cavity is arranged on the inner side wall of the mounting portion, and the bottom end of the inlet liquid cavity extends into the spraying portion of the nozzle.

4. The nozzle for a nitrogen fire extinguishing system according to claim 3, characterized in that, The confluence cavity is a cavity structure that gradually tapers from the inlet liquid cavity and extends towards the spraying portion.

5. The nozzle for a nitrogen fire extinguishing system according to claim 4, characterized in that, The core cavity is arranged at one end of the confluence cavity away from the inlet liquid cavity.

6. The nozzle for a nitrogen fire extinguishing system according to claim 5, characterized in that, The swirl cavity is arranged at one end of the core cavity away from the confluence cavity, and the inner diameter of the swirl cavity is smaller than the inner diameter of the core cavity.

7. The nozzle for a nitrogen fire extinguishing system according to claim 6, characterized in that, The nozzle includes a spraying inner angle that gradually tapers from the swirl cavity towards the outside of the spraying portion, a spraying channel that extends outward with an equal diameter from the spraying inner angle, and a spraying outer angle that gradually expands outward from the spraying channel.

8. The nozzle for a nitrogen fire extinguishing system according to claim 1, wherein, The diversion plate is a rhombic plate, and the rhombic plate is arranged in the axial direction of the core cavity.

9. The nozzle for a nitrogen fire extinguishing system according to claim 8, wherein The diversion plate assembly includes a first diversion plate starting from one side wall of the diversion plate and perpendicular to the outside until it fits with the inner wall of the core cavity, and a second diversion plate starting from the other side wall of the diversion plate and perpendicular to the outside until it fits with the inner wall of the core cavity. The inclined surfaces of the first diversion plate and the second diversion plate face the medium conveying direction.

10. The nozzle for a nitrogen fire extinguishing system according to claim 9, characterized in that, The drainage groove penetrates through the first diversion plate and / or the second diversion plate.

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