Fine water mist nozzles and fine water mist fire extinguishing systems

Abstract

This invention belongs to the field of fire protection technology and discloses a fine water mist nozzle and a fine water mist fire extinguishing system. The fine water mist nozzle includes a shell and a valve core. The shell has an inner cavity that is connected to a water inlet, which allows water to flow through and enter the inner cavity. The valve core is disposed in the inner cavity and has a water inlet hole, a water flow channel, a water outlet hole, and a collection chamber connected in sequence. The water inlet hole can be connected to the water inlet hole through the inner cavity to allow water to enter the water inlet hole, or separated from the water inlet hole to prevent water from entering the water inlet hole. The collection chamber is connected to the water outlet hole, which is used for water flow or water mist spraying, so that water flow can be sprayed out from the water outlet hole. Multiple water outlet holes are provided, which are spaced apart along the circumference of the valve core. The center lines of the multiple water outlet holes are all at an angle to the center line of the valve core, and the center lines of the multiple water outlet holes intersect at a point, so that the water flow from the multiple water outlet holes collides, increasing the disturbance of the water flow film and thus improving the atomization effect.

Description

Technical Field

[0001] This invention relates to the field of fire protection technology, and in particular to fine water mist nozzles and fine water mist fire extinguishing systems. Background Technology

[0002] According to the International Convention for the Safety of Life at Sea (SOLAS), ships must be equipped with fixed fire extinguishing systems. Fine water mist fire extinguishing systems have advantages over water spray fire extinguishing systems, such as lower water consumption and wider application range, and are therefore widely used in ships such as passenger roll-on / roll-off ships.

[0003] In fine water mist fire suppression systems, water is atomized and sprayed out from fine water mist nozzles. Marine fine water mist nozzles typically employ pressure mechanical atomization, specifically categorized into direct-flow impact atomizing nozzles and pressure swirl atomizing nozzles. Direct-flow impact atomizing nozzles utilize a high-speed jet that directly impacts a striker on the nozzle's outer pin, breaking the fluid into fine droplets for atomization. Pressure swirl atomizing nozzles accelerate liquid flow through a central swirling channel, while the swirling liquid forms an air column that is compressed against the nozzle wall. The liquid film at the nozzle outlet is relatively thin, and then the strong interaction between the jet film and the atmosphere breaks it into fine water droplets. However, for direct-flow impact atomizing nozzles, the jet needs to impact the striker for atomization, and the striker is easily damaged by impacts, leading to a decrease in atomization efficiency. Summary of the Invention

[0004] According to one aspect of the present invention, the present invention provides a fine water mist nozzle to solve the problem that the impact pin of the prior art DC impact atomizing nozzle is easily damaged by collision, thereby resulting in a decrease in atomization effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Fine water mist nozzles include:

[0007] The outer shell has an inner cavity that is connected to a water inlet for water to flow through and enter the inner cavity;

[0008] A valve core is disposed in the inner cavity. The valve core has a water inlet hole, a water flow channel, a water outlet hole, and a collection cavity connected in sequence. The water inlet hole can be connected to the water inlet through the inner cavity to allow water to flow into the water inlet hole, or separated from the water inlet to prevent water from flowing into the water inlet hole. Multiple water outlet holes are provided, and the multiple water outlet holes are spaced apart along the circumference of the valve core. The center lines of the multiple water outlet holes are all at an angle to the center line of the valve core, and the center lines of the multiple water outlet holes intersect at a point. The collection cavity is connected to the water outlet hole, and the water outlet hole is used for water flow or water mist spraying.

[0009] As a preferred embodiment of the fine water mist nozzle, the inner cavity includes a first cavity communicating with the water inlet and a second cavity communicating with the first cavity. The valve core includes a first valve body and a second valve body. The second valve body is slidably disposed in the second cavity and is always in contact with the cavity wall of the second cavity. The valve core can slide relative to the outer shell and has an open position and a closed position. When the valve core is in the open position, the first valve body is located in the second cavity, so that the water inlet and the water inlet are in communication through the inner cavity. When the valve core is in the closed position, at least a portion of the first valve body enters the first cavity and is in contact with the cavity wall of the first cavity, so that the water inlet is separated from the water inlet.

[0010] As a preferred embodiment of the fine water mist nozzle, the outer casing has an abutment surface adjacent to the cavity wall of the second chamber. When the valve core is in the open position, the second valve body abuts against the abutment surface in the vertical direction to prevent the second valve body from sliding downward.

[0011] As a preferred embodiment of the fine water mist nozzle, the outer shell has a first snap-fit ​​inclined surface. The fine water mist nozzle also includes a temperature-sensing glass bulb and two clamping rods. The extension direction of the temperature-sensing glass bulb is perpendicular to the center line of the valve core. When the valve core is in the closed position, the valve core is simultaneously supported by the two clamping rods. The inner sides of the two clamping rods respectively abut against the two ends of the temperature-sensing glass bulb, and the distance between the upper ends of the two clamping rods is smaller than the distance between the lower ends of the two clamping rods. The outer sides of the two clamping rods each have a second snap-fit ​​inclined surface, and both of the second snap-fit ​​inclined surfaces abut against the first snap-fit ​​inclined surface to prevent the two clamping rods from falling off.

[0012] As a preferred embodiment of the fine water mist nozzle, the inner sides of both clamping rods are provided with clamping grooves, and the two ends of the temperature-sensing glass bulb are respectively located in the two clamping grooves.

[0013] As a preferred embodiment of the fine water mist nozzle, a first sealing ring is provided on the outer wall of the first valve body. When the valve core is in the closed position, the first sealing ring is in contact with the cavity wall of the first cavity.

[0014] As a preferred embodiment of the fine water mist nozzle, a filter screen is provided in the first cavity, and the filter screen is configured to allow only water to pass through.

[0015] As a preferred embodiment of the fine water mist nozzle, it also includes a striker connected to the valve core, the striker being positioned directly opposite the water outlet.

[0016] As a preferred embodiment of the fine water mist nozzle, the water flow channel is annular, and the centerline of the water inlet is tangent to the water flow channel.

[0017] According to another aspect of the present invention, a fine water mist fire extinguishing system is provided, comprising the aforementioned fine water mist nozzle, and further comprising a water inlet pipe for supplying water to the water inlet.

[0018] The beneficial effects of this invention are:

[0019] This invention provides a fine water mist nozzle, which includes a housing and a valve core. The housing has an inner cavity that communicates with a water inlet, through which water flows and enters the inner cavity. The valve core is disposed in the inner cavity and has a water inlet hole, a water flow channel, a water outlet hole, and a collection chamber connected in sequence. The water inlet hole can communicate with the water inlet hole through the inner cavity to allow water to enter the water inlet hole, or it can be separated from the water inlet hole to prevent water from entering the water inlet hole. The collection chamber communicates with the water outlet hole, which is used for water flow or water mist spraying, thereby enabling water to be sprayed out from the water outlet hole to complete fire extinguishing. Furthermore, multiple water outlets are provided, spaced apart along the circumference of the valve core. The centerlines of these outlets form an angle with the centerline of the valve core, and all centerlines intersect at a single point. This causes the water streams from the multiple outlets to collide, increasing the turbulence of the water flow film. This increases the relative velocity and contact area between the film and air, generating greater friction and facilitating film breakage, thereby improving atomization. Simultaneously, this structure eliminates the need for a striking pin to achieve water flow impact, resulting in a simple design.

[0020] The present invention also provides a fine water mist fire extinguishing system, including the above-mentioned fine water mist nozzle. The water flowing out of the multiple outlet holes of the fine water mist nozzle impacts each other, increasing the disturbance of the water flow film and improving the atomization effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the fine water mist nozzle in an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the fine water mist nozzle in an embodiment of the present invention.

[0023] In the picture:

[0024] 100, Inlet; 200, Outlet;

[0025] 1. Outer shell; 101. Inner cavity; 1011. First cavity; 1012. Second cavity; 11. Abutting surface; 12. First snap-fit ​​bevel; 13. Third sealing ring; 14. Outer shell body; 15. Fixing nut;

[0026] 2. Valve core; 201. Water inlet; 202. Water flow channel; 203. Collector cavity; 21. First valve body; 211. First sealing ring; 22. Second valve body; 221. Second sealing ring; 222. Sleeve; 223. Inner core;

[0027] 3. Temperature-sensitive glass bulb;

[0028] 4. Clamping rod; 41. Second snap-fit ​​inclined surface;

[0029] 5. Firing pin;

[0030] 6. Filter screen;

[0031] 7. Install the flange. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0033] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0036] Fine water mist fire suppression systems have advantages over water sprinkler systems, such as lower water consumption and wider application range, and are therefore widely used on ships such as passenger roll-on / roll-off ships. In fine water mist fire suppression systems, direct-flow impact atomizing nozzles utilize high-speed jets to directly impact the outer impact pin of the nozzle, breaking the fluid into fine droplets and atomizing it. However, the jet needs to impact the impact pin to atomize, and the impact pin is easily damaged by collisions, resulting in a decrease in atomization effect.

[0037] To address the aforementioned issues, this embodiment provides a fine water mist nozzle to solve the problem that the impact pin of the existing DC impact atomizing nozzle is easily damaged by collisions, resulting in a decrease in atomization effect. It can be used in the field of fire protection technology, specifically in marine fine water mist fire extinguishing systems and building fire extinguishing systems.

[0038] Reference Figures 1-2 The fine water mist nozzle includes a housing 1 and a valve core 2. The housing 1 has an inner cavity 101, which is connected to a water inlet 100. The water inlet 100 is used for water to flow through and enter the inner cavity 101. The valve core 2 is disposed in the inner cavity 101 and has a water inlet hole 201, a water flow channel 202, a water outlet hole, and a collection chamber 203 connected in sequence. The water inlet hole 201 can be connected to the water inlet 100 through the inner cavity 101 to allow water to flow into the water inlet hole 201, or it can be separated from the water inlet 100 to prevent water from flowing into the water inlet hole 201. The collection chamber 203 is connected to the water outlet 200, which is used for water flow or water mist spraying, so that water can be sprayed out from the water outlet 200 to complete the fire extinguishing.

[0039] Continue to refer to Figures 1-2 The valve core 2 has multiple water outlets spaced apart along its circumference. The centerlines of these outlets form an angle with the centerline of the valve core 2, and all centerlines intersect at a single point. This causes the water streams from the multiple outlets to collide, increasing the disturbance of the water flow film and thus increasing the relative velocity and contact area between the film and air. This generates greater friction, facilitating film breakage and improving atomization. Furthermore, this structure eliminates the need for a striking pin to achieve water flow impact, resulting in a simple design.

[0040] Continue to refer to Figures 1-2The inner cavity 101 includes a first cavity 1011 communicating with the water inlet 100 and a second cavity 1012 communicating with the first cavity 1011. The valve core 2 includes a first valve body 21 and a second valve body 22. The second valve body 22 is slidably disposed in the second cavity 1012 and is always in contact with the cavity wall of the second cavity 1012. In this embodiment, the center line of the valve core 2 extends in the vertical direction, and the second valve body 22 is slidably disposed in the second cavity 1012 in the vertical direction. The valve core 2 can slide relative to the outer shell 1 to have an open position and a closed position. When the valve core 2 is in the open position, the first valve body 21 is located in the second cavity 1012 so that the water inlet 201 and the water inlet 100 are connected through the inner cavity 101. At this time, the water flow can enter the inner cavity 101 through the water inlet 100 and flow through the water inlet 201, the water flow channel 202, the water outlet and the collection cavity 203 in sequence, and finally be ejected from the water outlet 200. When the valve core 2 is in the closed position, at least a portion of the first valve body 21 enters the first chamber 1011 and fits against the chamber wall of the first chamber 1011, thereby separating the water inlet 201 from the water inlet 100, thus preventing water from entering the water inlet 201 and preventing water from spraying out of the water outlet 200. In the event of a fire, the valve core 2 can move from the closed position to the open position.

[0041] Optionally, the second valve body 22 includes an inner core 222 and a sleeve 223 connected to the inner core 222, with the inner wall of the sleeve 222 and the outer wall of the inner core 223 spaced apart to form a water flow channel 202.

[0042] Continue to refer to Figures 1-2 The outer casing 1 has an abutment surface 11 adjacent to the cavity wall of the second cavity 1012. When the valve core 2 is in the open position, the second valve body 22 abuts against the abutment surface 11 in the vertical direction to prevent the second valve body 22 from sliding downward, thereby avoiding excessive movement of the second valve body 22 and preventing the second valve body 22 from falling off from the bottom of the outer casing 1.

[0043] Continue to refer to Figures 1-2In this embodiment, the fine water mist nozzle is a closed nozzle. Specifically, the outer shell 1 has a first snap-fit ​​inclined surface 12. To avoid interference between the first snap-fit ​​inclined surface 12 and the sliding of the second valve body 22, the outer wall of the second valve body 22 also has an inclined surface adapted to the first snap-fit ​​inclined surface 12, that is, the upper diameter of the second valve body 22 is larger and the lower diameter is smaller. Optionally, the first snap-fit ​​inclined surface 12 is annular. The fine water mist nozzle also includes a temperature-sensing glass bulb 3 and two clamping rods 4. The temperature-sensing glass bulb 3 can be broken by heat. The extension direction of the temperature-sensing glass bulb 3 is perpendicular to the center line of the valve core 2. When the valve core 2 is in the closed position, it is simultaneously supported by two clamping rods 4. The inner sides of the two clamping rods 4 abut against the two ends of the temperature-sensing glass bulb 3, and the distance between the upper ends of the two clamping rods 4 is smaller than the distance between the lower ends of the two clamping rods 4. The outer sides of the two clamping rods 4 each have a second locking bevel 41, which abut against the first locking bevel 12 to prevent the two clamping rods 4 from falling off. When the temperature-sensing glass bulb 3 is not broken by heat, it opens the two clamping rods 4 so that the second locking bevel 41 of the two clamping rods 4 abut against the first locking bevel 12, preventing the clamping rods 4 from falling off the outer shell 1. At this time, the clamping rods 4 support the valve core 2, keeping it in the closed position, and the fine water mist nozzle cannot spray water or water mist. When the temperature-sensing glass bulb 3 breaks due to heat, the two clamping rods 4 lose the support of the temperature-sensing glass bulb 3, causing the two second snap-fit ​​inclined surfaces 41 to fall off the first snap-fit ​​inclined surface 12, thus causing the two clamping rods 4 to fall off. At this time, the valve core 2 falls from the closed position to the open position, and the water inlet 201 connects with the water inlet 100, so that the fine water mist nozzle can spray water flow or water mist.

[0044] In some embodiments, the fine water mist nozzle can also be an open nozzle, used in conjunction with a fire detection system and a control system to achieve fire alarm and automatic fire suppression. The specific structure of the fire detection and control system is common technology in the field and will not be described in detail here. The principle of the automatic fire suppression described above is that the fire detection system detects a fire signal. When a fire is detected in an area, the signal is transmitted to the control system. The control system controls the valve core 2 to move from the closed position to the open position. At this time, the outlet 200 of the fine water mist nozzle can spray water or water mist to achieve automatic fire suppression.

[0045] Continue to refer to Figures 1-2 The two ends of the temperature-sensing glass bulb 3 can be kept stationary with the clamping rod 4 by friction, preventing the temperature-sensing glass bulb 3 from falling before it breaks due to heat. In order to further prevent the temperature-sensing glass bulb 3 from falling, clamping grooves are opened on the inner side of both clamping rods 4. The two ends of the temperature-sensing glass bulb 3 are respectively located in the two clamping grooves, so that the temperature-sensing glass bulb 3 is placed in the clamping grooves. The groove walls of the clamping grooves limit the temperature-sensing glass bulb 3 and prevent it from falling before it breaks due to heat.

[0046] Continue to refer to Figures 1-2 The outer wall of the first valve body 21 is provided with a first sealing ring 211. When the valve core 2 is in the closed position, the first sealing ring 211 fits against the cavity wall of the first cavity 1011 to prevent leakage when the valve core 2 is in the closed position. Optionally, the outer wall of the first valve body 21 is provided with a first sealing ring mounting groove, and the first sealing ring 211 is disposed in the first sealing ring mounting groove. In addition, to prevent water from flowing between the second valve body 22 and the outer shell 1 when the valve core 2 is in the open position, the outer wall of the second valve body 22 is provided with a second sealing ring 221. Optionally, the outer wall of the second valve body 22 is provided with a second sealing ring mounting groove, and the second sealing ring 221 is disposed in the second sealing ring mounting groove. Further optionally, the second sealing ring 221 is a Glyd ring to improve sealing performance.

[0047] Continue to refer to Figures 1-2 A filter screen 6 is provided in the first cavity 1011. The filter screen 6 is configured to allow only water to pass through in order to prevent impurities in the water from entering and blocking the flow channel.

[0048] Optionally, the outer casing 1 includes an outer casing body 14 and a fixing nut 15. The outer wall of the fixing nut 15 is threadedly connected to the outer casing body 14. The inner cavity 101 is located in the outer casing body 14, and the abutment surface 11 is the upper end face of the fixing nut 15. The first snap-fit ​​inclined surface 12 is provided on the inner wall of the fixing nut 15. The upper end of the outer casing body 14 needs to be inserted into a hole connected to the water inlet pipe. To prevent water leakage between the hole wall and the outer wall of the outer casing body 14, a third sealing ring 13 is provided on the outer wall of the outer casing body 14. Optionally, a third sealing ring mounting groove is formed on the outer wall of the outer casing body 14, and the third sealing ring 13 is disposed in the third sealing ring mounting groove.

[0049] Optionally, the outer wall of the housing 1 is provided with a mounting flange 7 so that the housing 1 can be mounted on the top wall of the ship's engine room or the ceiling of a building via the mounting flange 7. One or more mounting flanges 7 can be provided to adapt to different installation locations.

[0050] Based on the DC impact atomizing nozzle and the pressure swirl atomizing nozzle, some technicians have combined the characteristics and performance of these two types of nozzles to design a swirl impact nozzle. In this type of nozzle, the water, after swirling, increases the dynamic instability of the water film by the air through the impact of the jet and the impacting pin, increasing the disturbance to the liquid film and facilitating its breakup, thereby improving the atomization effect. However, for ships such as passenger roll-on / roll-off ships with a large number of nozzles and complex piping systems, the system design pressure is relatively high, leading to problems such as leakage and insufficient pressure in high-pressure water mist systems. To address this, the fine water mist nozzle provided in this embodiment improves the atomization effect through swirling and two water flow impacts, and is applicable to medium-pressure fine water mist fire extinguishing systems on ships. Its specific structure is as follows.

[0051] Continue to refer to Figures 1-2 The fine water mist nozzle also includes a striking pin 5 connected to the valve core 2. The striking pin 5 is positioned directly opposite the water outlet 200. By setting the striking pin 5, the water jet from the water outlet 200 impacts the striking pin 5, completing the second water jet impact, further increasing the disturbance of the water jet film, and improving the atomization effect.

[0052] Continue to refer to Figures 1-2 The water flow channel 202 is annular, and the centerline of the water inlet 201 is tangent to the water flow channel 202, so that the water flow forms a swirling flow within the annular water flow channel 202, and the swirling flow accelerates within the water flow channel 202 to improve the atomization effect. Optionally, multiple water inlets 201 are provided.

[0053] This embodiment also provides a fine water mist fire extinguishing system, including the aforementioned fine water mist nozzle. The water streams from the multiple outlets of the fine water mist nozzle collide, increasing the turbulence of the water film and resulting in better atomization. The fine water mist fire extinguishing system also includes an inlet pipe for supplying water to the inlet 100. The inlet pipe can be connected to a water tank or to the water supply pipe of a ship's domestic water supply system, and is equipped with a high-head pump to supply water to the inlet 100.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A fine water mist nozzle, characterized in that, include: The outer shell (1) has an inner cavity (101) that is connected to a water inlet (100) for water to flow through and enter the inner cavity (101). A valve core (2) is disposed in the inner cavity (101). The valve core (2) has a water inlet hole (201), a water flow channel (202), a water outlet hole, and a collection cavity (203) connected in sequence. The water inlet hole (201) can be connected to the water inlet (100) through the inner cavity (101) so that water can flow into the water inlet hole (201), or separated from the water inlet (100) so as to prevent water from flowing into the water inlet hole (201). Multiple water outlet holes are provided. Multiple water outlet holes are spaced apart along the circumferential direction of the valve core (2). The center lines of multiple water outlet holes are all at an angle to the center line of the valve core (2), and the center lines of multiple water outlet holes intersect at a point. The collection cavity (203) is connected to the water outlet (200). The water outlet (200) is used for water flow or water mist spraying. The inner cavity (101) includes a first cavity (1011) communicating with the water inlet (100) and a second cavity (1012) communicating with the first cavity (1011). The valve core (2) includes a first valve body (21) and a second valve body (22). The second valve body (22) is slidably disposed in the second cavity (1012) and is always in contact with the cavity wall of the second cavity (1012). The valve core (2) can slide relative to the outer shell (1) and has an open position and a closed position. When the valve core (2) is in the open position, the first valve body (21) is located in the second cavity (1012) so that the water inlet (201) and the water inlet (100) are connected through the inner cavity (101). When the valve core (2) is in the closed position, at least part of the first valve body (21) enters the first cavity (1011) and fits against the cavity wall of the first cavity (1011) so that the water inlet (201) is separated from the water inlet (100).

2. The fine water mist nozzle according to claim 1, characterized in that, The outer casing (1) has an abutment surface (11) adjacent to the cavity wall of the second cavity (1012). When the valve core (2) is in the open position, the second valve body (22) abuts against the abutment surface (11) in the vertical direction to prevent the second valve body (22) from sliding downward.

3. The fine water mist nozzle according to claim 1, characterized in that, The outer shell (1) has a first snap-fit ​​inclined surface (12). The fine water mist nozzle also includes a temperature-sensing glass bulb (3) and two clamping rods (4). The extension direction of the temperature-sensing glass bulb (3) is perpendicular to the center line of the valve core (2). When the valve core (2) is in the closed position, the valve core (2) is supported by the two clamping rods (4). The inner sides of the two clamping rods (4) respectively abut against the two ends of the temperature-sensing glass bulb (3), and the distance between the upper ends of the two clamping rods (4) is smaller than the distance between the lower ends of the two clamping rods (4). The outer sides of the two clamping rods (4) each have a second snap-fit ​​inclined surface (41). The two second snap-fit ​​inclined surfaces (41) abut against the first snap-fit ​​inclined surface (12) to prevent the two clamping rods (4) from falling off.

4. The fine water mist nozzle according to claim 3, characterized in that, The inner sides of the two clamping rods (4) are provided with clamping grooves, and the two ends of the temperature-sensing glass bulb (3) are respectively located in the two clamping grooves.

5. The fine water mist nozzle according to claim 1, characterized in that, The outer wall of the first valve body (21) is provided with a first sealing ring (211). When the valve core (2) is in the closed position, the first sealing ring (211) fits against the cavity wall of the first cavity (1011).

6. The fine water mist nozzle according to claim 1, characterized in that, A filter (6) is provided in the first cavity (1011), and the filter (6) is configured to allow only water to pass through.

7. The fine water mist nozzle according to any one of claims 1-6, characterized in that, It also includes a striker (5) connected to the valve core (2), the striker (5) being positioned directly opposite the outlet (200).

8. The fine water mist nozzle according to any one of claims 1-6, characterized in that, The water flow channel (202) is annular, and the center line of the water inlet (201) is tangent to the water flow channel (202).

9. A fine water mist fire extinguishing system, characterized in that, The device includes a fine water mist nozzle as described in any one of claims 1-8, and also includes a water inlet pipe for supplying water to the water inlet (100).

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