Spray head for fire extinguishing and explosion suppression bottle and fire extinguishing and explosion suppression bottle

Abstract

The utility model provides a fire extinguishing and explosion suppression bottle's spray head and fire extinguishing and explosion suppression bottle, the fire extinguishing and explosion suppression bottle's spray head comprises: a nozzle main body having a flow channel, the flow channel comprises an inlet section, a rotational flow section and an outlet acceleration section, the outlet acceleration section comprises a necking section and a flaring section in the direction from the inlet section to the outlet acceleration section, the outlet area of the flaring section is smaller than the inlet area of the necking section; and the rotary core is fixedly arranged in the rotational flow section and comprises inclined plates which are arranged at intervals in the circumferential direction of the flow channel, so that the rotational flow section is divided into a plurality of rotational flow spaces which are arranged in the circumferential direction. By the adoption of the technical scheme, the problem that explosion cannot be effectively restrained due to the fact that the spraying speed of a fire extinguishing and explosion restraining bottle is poor in the prior art can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to special fire extinguishing equipment, specifically, relate to a nozzle and fire extinguishing explosion suppression bottle for fire extinguishing explosion suppression bottle. BACKGROUND

[0002] At present, China's fire extinguishing explosion suppression system mainly uses halon 1301 extinguishing agent, and the ODP value is 12, which can cause damage to the ozone layer, and has been globally banned. The current mainstream gas extinguishing agent, heptafluoropropane, has a global warming potential (GWP) of 3800, and has a significant greenhouse effect, low fire extinguishing efficiency, and is not suitable for use in fire extinguishing explosion suppression systems. Therefore, an active research and development of a halon 1301 fire extinguishing explosion suppression device is needed, which is more environmentally friendly, has better explosion suppression effect, and is less toxic.

[0003] At present, there is an armored vehicle passenger cabin fire extinguishing explosion suppression device (CN115025416A), when the explosion suppression bottle receives a fire indication signal from the optical detector, the control box starts the electric detonation tube, the electric detonation tube breaks the positive arch-shaped sealing diaphragm, the positive arch-shaped sealing diaphragm is affected by the large pressure difference between the inside and outside of the bottle body, the agent in the bottle body is torn and expanded through the arch-shaped sealing diaphragm, and is sprayed outwards, and then passes through the upper valve body and the nozzle seat and hits the inner conical surface of the nozzle, and is emitted outward through the inner conical surface and hits the screen of the inner straight section of the nozzle, thereby realizing the atomization function of the liquid extinguishing agent.

[0004] The fire extinguishing explosion suppression device with the above structure can realize the atomization function of the liquid extinguishing agent, but the screen increases the spraying time, resulting in low fire extinguishing efficiency and serious decline in explosion suppression effect, and the atomization state is extremely poor in low temperature environment, which cannot effectively suppress the explosion. In addition, although the existing patent guarantees the atomization effect, the spraying speed cannot meet the requirements (≤110ms), which also leads to the inability to effectively suppress the explosion. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a nozzle and fire extinguishing explosion suppression bottle for fire extinguishing explosion suppression bottle, to solve the problem of ineffective explosion suppression caused by poor spraying speed of the fire extinguishing explosion suppression bottle in the prior art.

[0006] To solve the above technical problems, the utility model provides a nozzle for fire extinguishing explosion suppression bottle, which comprises: a nozzle body having a flow channel, the flow channel comprising an inlet section, a rotational flow section and an outlet accelerating section, the outlet accelerating section comprising a necked section and an expanded section in the direction from the inlet section to the outlet accelerating section, the outlet area of the expanded section being smaller than the inlet area of the necked section; a rotating core fixedly arranged in the rotational flow section, the rotating core comprising inclined plates arranged at intervals along the circumferential direction of the flow channel to separate the rotational flow section into a plurality of rotational flow spaces arranged circumferentially.

[0007] The utility model also provides a fire extinguishing and explosion suppressing bottle, comprising a spray head, which is the spray head used for the fire extinguishing and explosion suppressing bottle mentioned above.

[0008] By adopting the above technical solution, the utility model has the following beneficial effects:

[0009] By applying the technical solution of the present invention, when a fire occurs, the fire extinguishing agent in the fire extinguishing and explosion suppression bottle is sprayed into the nozzle body, and the fire extinguishing agent first collides with the rotary core in the nozzle body to be atomized for the first time. The fire extinguishing agent after the first atomization is sprayed toward the outlet acceleration section. Since the outlet acceleration section includes a necking section and a flaring section, and the outlet area of ​​the flaring section is smaller than the inlet area of ​​the necking section, according to the Laval principle, the speed of the fire extinguishing agent entering the outlet acceleration section will be greatly increased. The high-speed fire extinguishing agent sprayed out from the outlet acceleration section is then sprayed onto the guide plate for secondary atomization. The above structure has the following two advantages: First, the number of collisions of the fire extinguishing agent is increased, and effective droplets can be generated regardless of the ambient temperature, with good atomization effect, thereby ensuring the explosion suppression effect. Second, the speed of the fire extinguishing agent sprayed out from the nozzle is significantly improved, thereby shortening the spraying time, reducing the fire extinguishing efficiency, and further improving the explosion suppression effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a nozzle for fire extinguishing and explosion suppression bottles according to the present utility model is shown;

[0012] Figure 2 Shown Figure 1 A top view of the nozzle;

[0013] Figure 3 Shown Figure 2 A schematic cross-sectional view of the nozzle in the AA direction;

[0014] Figure 4 Shown Figure 1 Schematic diagram of the three-dimensional structure of the rotating core of the nozzle;

[0015] Figure 5 Shown Figure 4 A top view of the rotating core;

[0016] Figure 6 Shown Figure 4 A top view of the inclined plate of the rotating core;

[0017] Figure 7 a sectional view of a nozzle body of a spray head is shown; Figure 1

[0018] Figure 8 a perspective view of a fire extinguishing and explosion suppression bottle according to the present application is shown;

[0019] Figure 9 a top view of the fire extinguishing and explosion suppression bottle is shown; and Figure 8

[0020] Figure 10 a sectional view of the spray head in the direction of B-B is shown. Figure 9 Reference signs:

[0021] 10, nozzle body; 11, flow channel; 111, inlet section; 112, rotational flow section; 1121, rotational flow space; 113, outlet acceleration section; 1131, necked section; 1132, flared section; 12, auxiliary spray hole; 20, rotational core; 21, inclined plate; 211, quadrilateral; 212, short side; 213, long side; 214, connecting straight side; 22, center rod; 30, spray head.

[0022] DETAILED DESCRIPTION

[0023] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0024] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] ​​​In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] The present invention will be further explained below in conjunction with specific implementation methods.

[0027] like Figures 1 to 7 As shown, the nozzle for fire extinguishing and explosion suppression bottles of this embodiment includes a nozzle body 10 and a swirl core 20. The nozzle body 10 has a flow channel 11, which includes an inlet section 111, a swirl section 112, and an outlet acceleration section 113. The outlet acceleration section 113 includes a necking section 1131 and a flaring section 1132 in the direction from the inlet section 111 to the outlet acceleration section 113. The outlet area of ​​the flaring section 1132 is smaller than the inlet area of ​​the necking section 1131. The swirl core 20 is fixedly disposed within the swirl section 112 and includes inclined plates 21 arranged at intervals along the circumference of the flow channel 11, thereby dividing the swirl section 112 into a plurality of circumferentially arranged swirl spaces 1121.

[0028] Applying the technical solution of this embodiment, when a fire occurs, the fire extinguishing agent in the fire extinguishing and explosion suppression bottle is sprayed into the nozzle body, and the fire extinguishing agent first collides with the rotary core 20 in the nozzle body 10 to undergo the first atomization. After the first atomization, the fire extinguishing agent is sprayed toward the outlet acceleration section 113. Since the outlet acceleration section 113 includes a necking section 1131 and a flaring section 1132, and the outlet area of ​​the flaring section 1132 is smaller than the inlet area of ​​the necking section 1131, according to the Laval principle, the speed of the fire extinguishing agent entering the outlet acceleration section 113 will be greatly increased. The high-speed fire extinguishing agent sprayed out from the outlet acceleration section 113 is then sprayed onto the guide plate for secondary atomization. The above structure has the following two advantages: First, the number of collisions of the fire extinguishing agent is increased, and effective droplets can be generated regardless of the ambient temperature, with a good atomization effect, thereby ensuring the explosion suppression effect. Second, the speed of the fire extinguishing agent sprayed out from the nozzle is significantly improved, thereby shortening the spraying time, reducing the fire extinguishing efficiency, and further improving the explosion suppression effect.

[0029] like Figure 1 and Figure 7As shown, in this embodiment, one or more auxiliary spray holes 12 are provided on the sidewall of the nozzle body 10 corresponding to each swirl space 1121. The addition of the auxiliary spray holes 12 on the side increases the overall area of ​​the spray outlet, compensating for the kinetic energy loss caused by the fire extinguishing agent impacting the swirl core, increasing the overall spray velocity, and achieving high spraying efficiency and fire extinguishing efficiency.

[0030] It should be noted that the structure of the swirl core can achieve zoned pressurization, so that the fire extinguishing agent sprayed from the auxiliary nozzle 12 has a high emission speed, a more uniform speed distribution, a better atomization effect, and a longer spray distance.

[0031] like Figure 3 and Figure 7 As shown, in this embodiment, the auxiliary nozzle holes 12 are inclined holes that gradually extend from the inside to the outside toward the outlet acceleration section 113. The auxiliary nozzle holes 12 of this structure can provide a certain degree of guidance for the fire extinguishing agent, allowing the auxiliary nozzle holes 12 to more effectively impact the guide plate above, thereby improving the atomization effect.

[0032] In this embodiment, the inclination angle of the inclined hole is between 45° and 60°.

[0033] The flow path of the fire extinguishing agent is described in detail below:

[0034] The fire extinguishing agent enters the nozzle body 10 through the inlet section 111, directly colliding with the swirl core 20. Most of the agent then enters the outlet acceleration section 113. Due to the characteristics of explosion suppression bottles, which are pressure-stored and reach pressures as high as 4.2 MPa, the fire extinguishing agent flows very rapidly. Upon reaching the constricted section 1131, the special structure (reduction) of the constricted section 1131 causes some of the agent to strike the wall. This impact with the following extinguishing agent creates a recoil, and under pressure, the agent flows out of the auxiliary nozzle orifice 12, reducing the duration of the extinguishing agent spray. Furthermore, the angled nozzle orifice allows the agent to re-spray onto the deflector plate, where it collides with the liquid ejected from the outlet acceleration section 113 and the surface of the deflector plate. Furthermore, the constricted section 1131 ensures more complete collisions between the agent and the deflector plate, creating a solid-liquid-gas collision. This significantly improves the effective utilization of the fire extinguishing agent and ensures a strong explosion suppression effect during the first 30 milliseconds.

[0035] Since the swirl core 20 is subjected to a large impact force from the fire extinguishing agent during actual use, it is easy to deform, thereby affecting the final swirl effect. Figure 1As shown, in this embodiment, the swirl core 20 further includes a central rod 22, on which each inclined plate 21 is mounted. This structure allows each inclined plate 21 to transmit the impact force to the central rod 22 when impacted. In other words, the central rod 22 partially absorbs the impact force for each inclined plate 21, significantly reducing deformation of the inclined plates 21 and ensuring the ultimate swirl effect.

[0036] like Figures 1 to 5 As shown, in this embodiment, the center rod 22 is a solid cylinder. Specifically, when the blades are impacted, the cylinder's excellent compressive strength prevents deformation of the blades connected to it, eliminating the need for excessively thick blade material. This reduces the need for excessively thick blade material, thereby increasing the size of each swirl space 1121, resulting in a larger flow domain, reduced kinetic energy loss, and a stronger swirl atomization effect.

[0037] In this embodiment, the ratio between the diameter of the central rod 22 and the diameter of the swirl section 112 is between 0.093 and 0.25. The above structure further increases the size of each swirl space 1121, making the flow area larger, the kinetic energy loss smaller, and the swirl atomization effect stronger.

[0038] like Figures 4 to 6 As shown, in this embodiment, the swirl core 20 is interference-fitted within the swirl section 112. The cross-section of the inclined plate 21 is a quadrilateral 211. The quadrilateral 211 includes a short side 212 connected to the center rod 22, a long side 213 abutting the inner wall of the swirl section 112, and a connecting straight side 214 connecting the short side 212 and the long side 213. This structure increases the contact area between the inclined plate 21 and the inner wall of the swirl section 112, making the inclined plate 21 less susceptible to displacement under the impact of the fire extinguishing agent. Furthermore, when the swirl core 20 is impacted, the area between the end surface of the inclined plate 21 and the necking section 1131 is increased, thereby improving the impact resistance of the axial surface of the swirl core.

[0039] like Figures 4 to 6 As shown, in this embodiment, the connecting straight edges 214 of the two end surfaces of the inclined plates 21 are projected onto a reference plane perpendicular to the center rod 22. The angle α between the two connecting straight edges 214 with the largest angular difference between the two end surfaces is 120°. The swirl core includes three evenly spaced inclined plates 21. This structure ensures that all fire extinguishing agent entering the swirl section 112 impacts the inclined plates 21, preventing the fire extinguishing agent from flowing directly out of the outlet acceleration section 113 without contacting the swirl core, thereby ensuring the ultimate swirl effect.

[0040] like Figures 8 to 10As shown, the application also provides a fire extinguishing and explosion suppression bottle, and an embodiment of the fire extinguishing and explosion suppression bottle according to the application comprises a spray head 30, which is the spray head for the fire extinguishing and explosion suppression bottle described above. Since the spray head described above has the advantage of increasing the spraying speed of the fire extinguishing agent, the fire extinguishing and explosion suppression bottle having the same also has this advantage, thereby improving the explosion suppression effect.

[0041] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A nozzle for fire extinguishing and explosion suppression bottles, characterized in that: include: A nozzle body (10) has a flow channel (11), the flow channel (11) comprising an inlet section (111), a swirl section (112), and an outlet acceleration section (113), the outlet acceleration section (113) comprising a necking section (1131) and a flaring section (1132) in a direction from the inlet section (111) to the outlet acceleration section (113), the outlet area of ​​the flaring section (1132) being smaller than the inlet area of ​​the necking section (1131); A swirl core (20) is fixedly arranged in the swirl section (112), and the swirl core (20) includes inclined plates (21) arranged at intervals along the circumferential direction of the flow channel (11) to separate the swirl section (112) into a plurality of swirl spaces (1121) arranged in the circumferential direction.

2. The nozzle for fire extinguishing and explosion suppression bottles according to claim 1, characterized in that: One or more auxiliary spray holes (12) are provided on the side wall of the nozzle body (10) corresponding to each swirl space (1121).

3. The nozzle for fire extinguishing and explosion suppression bottle according to claim 2, characterized in that: The auxiliary spray hole (12) is an inclined hole that gradually extends from the inside to the outside toward the outlet acceleration section (113).

4. The nozzle for fire extinguishing and explosion suppression bottles according to claim 3, characterized in that: The inclination angle of the inclined hole is between 45° and 60°.

5. The nozzle for fire extinguishing and explosion suppression bottles according to claim 1, characterized in that: The rotating core (20) further comprises a central rod (22), and each of the inclined plates (21) is arranged on the central rod (22).

6. The nozzle for fire extinguishing and explosion suppression bottles according to claim 5, characterized in that: The central rod (22) is a solid cylinder.

7. The nozzle for fire extinguishing and explosion suppression bottles according to claim 6, characterized in that: The ratio between the diameter of the central rod (22) and the diameter of the swirl section (112) is between 0.093 and 0.

25.

8. The nozzle for fire extinguishing and explosion suppression bottles according to claim 5, characterized in that: The swirl core (20) is interference-fittedly arranged in the swirl section (112); the cross section of the inclined plate (21) is a quadrilateral (211); the quadrilateral (211) comprises a short side (212) connected to the center rod (22), a long side (213) abutting against the inner wall of the swirl section (112), and a connecting straight side (214) connected between the short side (212) and the long side (213).

9. The nozzle for fire extinguishing and explosion suppression bottles according to claim 8, characterized in that: The connecting straight edges (214) of the two end surfaces of the inclined plate (21) are projected onto a reference plane perpendicular to the center rod (22), and the angle α between the two connecting straight edges (214) with the largest angle difference between the two end surfaces is 120°. The rotating core includes three evenly arranged inclined plates (21).

10. A fire extinguishing and explosion suppression bottle, comprising: The nozzle (30) is characterized in that the nozzle (30) is the nozzle for the fire extinguishing and explosion suppression bottle according to any one of claims 1 to 9.

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