Water mist nozzle

Abstract

The utility model provides a water mist nozzle, which belongs to the technical field of fire-fighting instruments and comprises a connecting shell and a base. A water inlet pipe used for being connected with a fire fighting system is arranged on the connecting shell, and a driving gear is arranged on the outer wall of the connecting shell and connected with a driving device; the base is rotatably arranged at the end of the connecting shell, a flow dividing cavity is formed between the base and the connecting shell, at least one spraying assembly is arranged on the base, a driven gear is arranged on the base, the driven gear is arranged in the circumferential direction of the connecting shell, and the driven gear is connected with the driving gear in a meshed mode. During use, the driving gear is driven by the driving device to drive the driven gear to rotate, so that the base drives the spraying assembly to rotate relative to the connecting shell, the spraying angle of the spraying assembly can be adjusted, and the water mist spraying range is widened. According to the water mist nozzle, the problem that the spraying direction of a water mist nozzle in the prior art is limited is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting equipment, in particular to a fine water mist nozzle. Background Art

[0002] Water mist fire extinguishing systems offer advantages such as environmental friendliness, safety, high fire extinguishing capacity, low water consumption, minimal water pollution, and a wide range of applications. They are an environmentally friendly and highly effective fire extinguishing technology widely used in the firefighting field. Water mist nozzles are a key component of water mist fire extinguishing systems and the most important factor in determining their performance.

[0003] At present, fine water mist fire extinguishing systems are usually equipped with fine water mist nozzles. The nozzles can work under a certain water pressure and spray the flowing water into mist. The nozzles are generally set at a fixed angle and spray water mist in a fixed direction.

[0004] However, the existing fine water mist nozzle cannot adjust the spray direction of the nozzle during operation and needs to be manually adjusted, so there is a disadvantage that the spray direction is limited. Utility Model Content

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the spray direction of the fine water mist nozzle in the prior art is limited, thereby providing a fine water mist nozzle.

[0006] In order to solve the above technical problems, the utility model provides a fine water mist nozzle, comprising:

[0007] A connecting shell, the connecting shell being provided with a water inlet pipe for connecting to a fire protection system, and a driving gear being provided on an outer wall of the connecting shell, the driving gear being connected to a driving device;

[0008] The base is rotatably arranged at the end of the connecting shell, a diversion chamber is formed between the base and the connecting shell, at least one injection assembly is arranged on the base, and a driven gear is arranged on the base. The driven gear is arranged along the circumference of the connecting shell, and the driven gear is meshed with the driving gear.

[0009] Optionally, a flange extending toward the outside of the connecting shell is provided on the base, and the driving gear is provided on the flange.

[0010] Optionally, the driving device is configured as a driving motor, and the driving gear is configured on a transmission rod at an output end of the driving motor.

[0011] Optionally, the injection assembly includes:

[0012] A connecting pipe is provided at the bottom of the base, the connecting pipe is communicated with the diversion cavity, and a plurality of limiting members are provided on the inner side wall of the connecting pipe;

[0013] An injection head is inserted into the inner side of the connecting pipe, and a limiting groove is provided on the outer side wall of the injection head, and the limiting groove is used to embed the limiting member;

[0014] The limiting sleeve is movably sleeved on the outer side of the connecting tube. When the limiting sleeve moves in a direction away from the base, the limiting sleeve squeezes the limiting member in a direction close to the limiting groove. When the limiting sleeve moves in a direction close to the base, the limiting member is released.

[0015] Optionally, a first step is provided on the side wall of the connecting tube, and a second step is provided on the inner wall of the limiting sleeve. The first step and the second step cooperate to form an installation cavity. An elastic member is provided in the installation cavity. The elastic member is sleeved on the outside of the connecting tube, one end of the elastic member abuts against the first step, and the other end of the elastic member abuts against the second step. The elastic member has an elastic force that pushes the limiting sleeve to move in a direction away from the base.

[0016] Optionally, a plurality of limit blocks are provided radially outward at the end of the connecting pipe, and the limit blocks form a blocking fit with the bottom end of the limit sleeve.

[0017] Optionally, an avoidance groove is provided on the outer wall of the connecting tube, and a limit block is rotatably provided in the avoidance groove. When the limit block is flipped outward, the limit block blocks the limit sleeve. When the limit block is flipped inward, the limit block is embedded in the avoidance groove, and the limit block avoids the limit sleeve.

[0018] Optionally, the avoidance groove is provided as an annular groove along the circumference of the connecting pipe, a limiting ring is provided in the avoidance groove, and the limiting block is rotatably connected to the limiting ring.

[0019] Optionally, the limiting member is configured as a ball, and a through mounting hole is provided on the side wall of the connecting tube, and the ball is embedded in the mounting hole. When the limiting sleeve moves to the mounting hole, the limiting sleeve squeezes the ball to protrude toward the inner side of the connecting tube so that the ball is embedded in the limiting groove.

[0020] Optionally, three injection assemblies are provided, and the three injection assemblies are symmetrically arranged around the center of the base.

[0021] The technical solution of this utility model has the following advantages:

[0022] 1. The water mist nozzle provided by this utility model is supplied by a firefighting system through a water inlet pipe. Water flows into a diversion chamber and sprays water mist through the spray assembly on the base. The driving gear is driven by a drive device to rotate, which in turn drives the driven gear, thereby causing the base to drive the spray assembly to rotate relative to the connecting shell. The spray angle of the spray assembly can be adjusted, thereby increasing the range of the spray mist. The fine water mist nozzle provided by this utility model solves the problem of the limited spray direction of fine water mist nozzles in the prior art.

[0023] 2. The fine water mist nozzle provided by the utility model has a flange on the base that can facilitate the installation of a driven gear along the circumference of the connecting shell, so that the base can rotate relative to the connecting shell to adjust the spray angle of the spray assembly, thereby increasing the range of the sprayed water mist.

[0024] 3. The fine water mist nozzle provided by the utility model drives the transmission rod at the output end of the motor to drive the driving gear to rotate, thereby driving the driven gear to drive the base to rotate, adjusting the spray angle of the spray assembly, thereby increasing the range of the sprayed water mist.

[0025] 4. The fine water mist nozzle provided by the utility model, when disassembling the nozzle head, moves the limiting sleeve toward the direction close to the base to release the limiting part, so that the limiting part can be disengaged from the limiting groove, and the nozzle head can be pulled out from the connecting pipe; when installing the nozzle head, the nozzle head is inserted into the connecting pipe, and the limiting sleeve is moved toward the direction away from the base. The limiting sleeve squeezes the limiting part, so that the limiting part is embedded in the limiting groove, thereby fixing the nozzle head, which can facilitate the replacement or maintenance of the nozzle head.

[0026] 5. The fine water mist nozzle provided by the utility model has the following characteristics: when the limiting sleeve moves toward the direction close to the base, the elastic part is squeezed, so that the elastic part has an elastic force to push the limiting sleeve to move toward the direction away from the base. Under the action of the elastic force, the limiting sleeve can be reset, so that the limiting sleeve keeps squeezing the limiting part, preventing the limiting sleeve from shifting during use and causing the spray head to fall off.

[0027] 6. In the water mist nozzle provided by the present invention, when the limiting sleeve slides along the connecting pipe under the elastic force of the elastic member, the limiting block can prevent the limiting sleeve from falling off the connecting pipe.

[0028] 7. The fine water mist nozzle provided by the utility model can move the limiting sleeve toward the base when it is necessary to repair or replace the internal parts of the connecting pipe, and rotate the limiting block inward so that the limiting block is embedded in the avoidance groove, thereby releasing the obstruction of the limiting sleeve. The limiting sleeve and the elastic part can be removed from the connecting pipe, and the parts can be quickly disassembled for repair or replacement, so that the fault can be eliminated, saving time and cost.

[0029] 8. In the water mist nozzle provided by the present invention, the limiting block is rotatably connected to the limiting ring, and the limiting block is rotatably installed in the avoidance groove through the limiting ring.

[0030] 9. The fine water mist nozzle provided by the utility model has the following characteristics: when the limiting sleeve moves to the mounting hole, the inner wall of the limiting sleeve squeezes the ball, causing the ball to move in the mounting hole toward the direction close to the limiting groove and embed into the limiting groove, thereby fixing the nozzle head; when the limiting sleeve moves toward the direction close to the base, the ball is released, and the ball moves in the mounting hole toward the direction away from the limiting groove, thereby releasing the fixation of the nozzle head.

[0031] 10. The fine water mist nozzle provided by the utility model has three spraying components symmetrically arranged around the center of the base, which can spray water mist at multiple angles and make the water mist distribution more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 This is a schematic diagram of an embodiment of a water mist nozzle provided in an embodiment of the present utility model;

[0034] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0035] Figure 3 for Figure 1 Schematic cross-section of the middle base;

[0036] Figure 4 for Figure 1 A partial cross-sectional diagram of the middle injection assembly;

[0037] Figure 5 for Figure 4 Schematic diagram of the enlarged portion B.

[0038] Description of reference numerals:

[0039] 1. Connecting shell; 2. Water inlet pipe; 3. Driving gear; 4. Driving device; 5. Base; 6. Driven gear; 7. Spray assembly; 8. Connecting pipe; 9. Limiting piece; 10. Spray head; 11. Limiting groove; 12. Limiting sleeve; 13. First step; 14. Second step; 15. Elastic piece; 16. Limiting block; 17. Avoidance groove; 18. Limiting ring; 19. Mounting hole. DETAILED DESCRIPTION

[0040] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "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 specific circumstances.

[0043] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] This embodiment provides a structure of a fine water mist nozzle capable of adjusting the spraying direction, which is used in a fine water mist fire extinguishing system.

[0045] like Figure 1-3 As shown, a specific implementation of a fine water mist nozzle provided in this embodiment includes: a connecting shell 1 and a base 5; the connecting shell 1 is provided with a water inlet pipe 2 for connecting to a fire protection system, and a driving gear 3 is provided on the outer wall of the connecting shell 1, and the driving gear 3 is connected to a driving device 4; the base 5 is rotatably provided at the end of the connecting shell 1, and a diversion cavity is formed between the base 5 and the connecting shell 1, at least one injection assembly 7 is provided on the base 5, and a driven gear 6 is provided on the base 5, the driven gear 6 is arranged along the circumference of the connecting shell 1, and the driven gear 6 is meshed and connected with the driving gear 3.

[0046] During use, the firefighting system supplies water through the water inlet pipe 2. Water flows into the diversion chamber and sprays water mist through the spray assembly 7 on the base 5. The driving gear 3 is driven by the driving device 4 to rotate, and the driving gear 3 drives the driven gear 6 to rotate, thereby causing the base 5 to drive the spray assembly 7 to rotate relative to the connecting shell 1. The spray angle of the spray assembly 7 can be adjusted, thereby increasing the range of the sprayed water mist. The fine water mist nozzle provided in this embodiment solves the problem of the limited spray direction of fine water mist nozzles in the prior art.

[0047] Specifically, the spray assembly 7 is provided with spray holes for spraying water mist.

[0048] like Figure 1 、 Figure 3 As shown, in the water mist nozzle provided in this embodiment, the base 5 is provided with a flange extending toward the outside of the connecting shell 1, and the driving gear 3 is disposed on the flange. The flange on the base 5 facilitates the installation of the driven gear 6 along the circumference of the connecting shell 1, thereby allowing the base 5 to rotate relative to the connecting shell 1, adjusting the spray angle of the spray assembly 7 and thereby increasing the range of the sprayed water mist. Alternatively, as an alternative embodiment, the edge of the flange can be configured as a serrated structure, and the base 5 and driving gear 3 can be integrally formed.

[0049] like Figure 1 、 Figure 2 As shown, in the fine water mist nozzle provided in this embodiment, the driving device 4 is configured as a driving motor, and the driving gear 3 is arranged on the transmission rod at the output end of the driving motor. The transmission rod at the output end of the driving motor drives the driving gear 3 to rotate, thereby driving the driven gear 6 to drive the base 5 to rotate, adjusting the spray angle of the spray assembly 7, and increasing the range of the sprayed water mist. In addition, as an alternative embodiment, the driving device 4 can also be provided with a water wheel, which is connected to the driving gear 3 via a transmission rod. The water wheel is arranged in the connecting shell 1, and the water flow drives the water wheel to rotate, thereby driving the driving gear 3 to rotate.

[0050] like Figure 1 、 Figure 3 、 Figure 4As shown, in the fine water mist nozzle provided in this embodiment, the spray assembly 7 includes: a connecting pipe 8, a spray head 10 and a limiting sleeve 12, the connecting pipe 8 is arranged at the bottom of the base 5, the connecting pipe 8 is connected to the diversion cavity, and a plurality of limiting members 9 are provided on the inner wall of the connecting pipe 8; the spray head 10 is inserted into the inner side of the connecting pipe 8, and a limiting groove 11 is provided on the outer wall of the spray head 10, and the limiting groove 11 is used to embed the limiting member 9; the limiting sleeve 12 is movably sleeved on the outer side of the connecting pipe 8, when the limiting sleeve 12 moves in the direction away from the base 5, the limiting sleeve 12 squeezes the limiting member 9 in the direction close to the limiting groove 11, and when the limiting sleeve 12 moves in the direction close to the base 5, the limiting member 9 is released. When removing the spray head 10, the limiting sleeve 12 is moved toward the direction close to the base 5 to release the limiting member 9, so that the limiting member 9 can be disengaged from the limiting groove 11, and the spray head 10 can be pulled out of the connecting pipe 8; when installing the spray head 10, the spray head 10 is inserted into the connecting pipe 8, and the limiting sleeve 12 is moved toward the direction away from the base 5. The limiting sleeve 12 squeezes the limiting member 9 so that the limiting member 9 is embedded in the limiting groove 11, thereby fixing the spray head 10 and facilitating the replacement or maintenance of the spray head 10. Specifically, the spray head 10 is provided with a spray hole for spraying water mist. In addition, as an alternative embodiment, the limiting sleeve 12 can be omitted, and the spray head 10 and the connecting pipe 8 are connected by a snap or thread connection.

[0051] Specifically, such as Figure 4 As shown, a plurality of the limiting members 9 are evenly arranged along the circumference of the connecting pipe 8, and the limiting groove 11 is arranged as an annular groove along the circumference of the injection head 10. In addition, as an alternative embodiment, the limiting groove 11 can also be arranged as a plurality of independent grooves, each of which corresponds to the limiting member 9 one by one.

[0052] like Figure 4As shown, in the fine water mist nozzle provided in this embodiment, the side wall of the connecting pipe 8 is provided with a first step 13, and the inner wall of the limiting sleeve 12 is provided with a second step 14. The first step 13 and the second step 14 cooperate to form a mounting cavity. An elastic member 15 is provided in the mounting cavity. The elastic member 15 is sleeved on the outer side of the connecting pipe 8. One end of the elastic member 15 abuts against the first step 13, and the other end of the elastic member 15 abuts against the second step 14. The elastic member 15 has an elastic force that pushes the limiting sleeve 12 to move away from the base 5. When the limiting sleeve 12 moves toward the direction close to the base 5, the elastic member 15 is squeezed, so that the elastic member 15 has an elastic force that pushes the limiting sleeve 12 to move away from the base 5. Under the action of the elastic force, the limiting sleeve 12 can be reset, so that the limiting sleeve 12 keeps squeezing the limiting member 9, preventing the limiting sleeve 12 from shifting during use and causing the spray head 10 to fall off. In addition, as an alternative embodiment, the elastic member 15 can be omitted, and the limiting sleeve 12 and the connecting pipe 8 are threadedly connected. When screwing, the limiting sleeve 12 can move along the connecting pipe 8.

[0053] like Figure 4 、 Figure 5 As shown, in the fine water mist nozzle provided in this embodiment, a plurality of limit blocks 16 are provided radially outward at the end of the connecting tube 8, and the limit blocks 16 form a blocking fit with the bottom end of the limit sleeve 12. When the limit sleeve slides along the connecting tube 8 under the elastic force of the elastic member 15, the limit blocks 16 can prevent the limit sleeve 12 from falling off the connecting tube 8. In addition, as an alternative embodiment, the limit blocks 16 can be omitted, and a guide groove can be provided on the limit sleeve 12, and a guide protrusion can be provided on the outer wall of the connecting tube 8, and the guide protrusion can be embedded in the guide groove.

[0054] like Figure 4 、 Figure 5As shown, in the fine water mist nozzle provided by this embodiment, an avoidance groove 17 is provided on the outer wall of the connecting pipe 8, and a limit block 16 is rotatably provided in the avoidance groove 17. When the limit block 16 is turned outward, the limit block 16 blocks the limit sleeve 12. When the limit block 16 is turned inward, the limit block 16 is embedded in the avoidance groove 17, and the limit block 16 avoids the limit sleeve 12. When it is necessary to repair or replace the internal parts of the connecting pipe 8, the limit sleeve 12 is moved toward the direction close to the base 5, and the limit block 16 is rotated inward so that the limit block 16 is embedded in the avoidance groove 17, thereby releasing the obstruction to the limit sleeve 12. The limit sleeve 12 and the elastic member 15 can be removed from the connecting pipe 8, and the parts can be quickly disassembled for repair or replacement, so that the fault can be eliminated, saving time and cost. In addition, as an alternative embodiment, the limit block 16 can also be set as an elastic telescopic structure. When it is necessary to remove the telescopic limit sleeve 12, the limit block 16 is pressed to make the limit block 16 shrink toward the avoidance groove 17, thereby releasing the obstruction to the limit sleeve 12.

[0055] like Figure 4 、 Figure 5 As shown, in the fine water mist nozzle provided by this embodiment, the avoidance groove 17 is set as an annular groove along the circumference of the connecting pipe 8, a limiting ring 18 is set in the avoidance groove 17, and the limiting block 16 is rotatably connected to the limiting ring 18. The limiting block 16 is rotatably connected to the limiting ring 18, and the limiting block 16 is rotatably installed in the avoidance groove 17 through the limiting ring 18. Specifically, the contact surface of the limiting block 16 close to one end of the avoidance groove 17 is set as an arc surface. In addition, as an alternative embodiment, the avoidance groove 17 can also be set as a plurality of independent grooves, and the limiting block 16 is hingedly installed in the groove.

[0056] like Figure 4 、 Figure 5As shown, in the fine water mist nozzle provided in this embodiment, the limiting member 9 is configured as a ball, and a through mounting hole 19 is provided on the side wall of the connecting tube 8. The ball is embedded in the mounting hole 19. When the limiting sleeve 12 moves to the mounting hole 19, the limiting sleeve 12 squeezes the ball toward the inner side of the connecting tube 8, so that the ball is embedded in the limiting groove 11. When the limiting sleeve 12 moves to the mounting hole 19, the inner wall of the limiting sleeve squeezes the ball, causing the ball to move in the mounting hole 19 toward the limiting groove 11 and embed in the limiting groove 11, thereby fixing the spray head 10. When the limiting sleeve 12 moves toward the base 5, the ball is released and moves in the mounting hole 19 away from the limiting groove 11, releasing the fixation of the spray head 10. Specifically, the ball will not fall out of the mounting hole 19. In addition, as an alternative embodiment, the limiting member 9 can be configured as a limiting column, and a spring is provided in the mounting hole 19 , and the spring has an elastic force that pushes the limiting column away from the limiting groove 11 .

[0057] like Figure 1 、 Figure 3 As shown, in the water mist nozzle provided in this embodiment, three spray assemblies 7 are provided, and the three spray assemblies 7 are symmetrically arranged about the center of the base 5. The symmetrical arrangement of the three spray assemblies 7 about the center of the base 5 enables multi-angle spraying of water mist, resulting in more uniform distribution of the water mist. Alternatively, one, two, or more spray assemblies 7 can be provided, depending on design requirements, and the spray angles of the spray assemblies 7 can be adjusted to any desired value.

[0058] Directions:

[0059] like Figure 1 As shown, the fine water mist nozzle provided in this embodiment, when in use, the fire protection system supplies water through the water inlet pipe 2, the water flows into the diversion cavity, and sprays water mist through the injection assembly 7 on the base 5. The driving gear 3 is driven to rotate by the driving device 4, and the driving gear 3 drives the driven gear 6 to rotate, so that the base 5 drives the injection assembly 7 to rotate relative to the connecting shell 1, and the injection angle of the injection assembly 7 can be adjusted, thereby increasing the range of the injected water mist.

[0060] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A water mist nozzle, characterized in that: include: A connecting shell (1), wherein the connecting shell (1) is provided with a water inlet pipe (2) for connecting to a fire protection system, and a driving gear (3) is provided on the outer wall of the connecting shell (1), and the driving gear (3) is connected to a driving device (4); A base (5) is rotatably arranged at the end of the connecting shell (1), a diversion chamber is formed between the base (5) and the connecting shell (1), at least one injection assembly (7) is arranged on the base (5), and a driven gear (6) is arranged on the base (5), the driven gear (6) is arranged along the circumference of the connecting shell (1), and the driven gear (6) is meshed with the driving gear (3).

2. The water mist nozzle according to claim 1, characterized in that: The base (5) is provided with a flange extending toward the outside of the connecting shell (1), and the driving gear (3) is provided on the flange.

3. The water mist nozzle according to claim 1, characterized in that: The driving device (4) is configured as a driving motor, and the driving gear (3) is configured on a transmission rod at the output end of the driving motor.

4. The water mist nozzle according to any one of claims 1 to 3, characterized in that: The injection assembly (7) comprises: A connecting pipe (8) is provided at the bottom of the base (5), the connecting pipe (8) is in communication with the diversion cavity, and a plurality of limiting members (9) are provided on the inner side wall of the connecting pipe (8); An injection head (10) is inserted into the inner side of the connecting pipe (8), and a limiting groove (11) is provided on the outer side wall of the injection head (10), and the limiting groove (11) is used to embed the limiting member (9); A limiting sleeve (12) is movably sleeved on the outer side of the connecting pipe (8); when the limiting sleeve (12) moves in a direction away from the base (5), the limiting sleeve (12) presses the limiting member (9) in a direction close to the limiting groove (11); and when the limiting sleeve (12) moves in a direction close to the base (5), the limiting member (9) is released.

5. The water mist nozzle according to claim 4, characterized in that: The side wall of the connecting tube (8) is provided with a first step (13), and the inner wall of the limiting sleeve (12) is provided with a second step (14). The first step (13) and the second step (14) cooperate to form a mounting cavity. An elastic member (15) is provided in the mounting cavity. The elastic member (15) is sleeved on the outer side of the connecting tube (8). One end of the elastic member (15) abuts against the first step (13), and the other end of the elastic member (15) abuts against the second step (14). The elastic member (15) has an elastic force that pushes the limiting sleeve (12) to move in a direction away from the base (5).

6. The water mist nozzle according to claim 5, characterized in that: A plurality of limit blocks (16) are provided radially outward at the end of the connecting pipe (8), and the limit blocks (16) form a blocking fit with the bottom end of the limit sleeve (12).

7. The water mist nozzle according to claim 6, characterized in that: An avoidance groove (17) is provided on the outer wall of the connecting pipe (8), and a limit block (16) is rotatably provided in the avoidance groove (17). When the limit block (16) is turned outward, the limit block (16) blocks the limit sleeve (12); when the limit block (16) is turned inward, the limit block (16) is embedded in the avoidance groove (17), and the limit block (16) avoids the limit sleeve (12).

8. The water mist nozzle according to claim 7, characterized in that: The avoidance groove (17) is provided as an annular groove along the circumference of the connecting pipe (8), a limiting ring (18) is provided in the avoidance groove (17), and the limiting block (16) is rotatably connected to the limiting ring (18).

9. The water mist nozzle according to claim 4, characterized in that: The limiting member (9) is configured as a ball, a through mounting hole (19) is provided on the side wall of the connecting tube (8), and the ball is embedded in the mounting hole (19). When the limiting sleeve (12) moves to the mounting hole (19), the limiting sleeve (12) squeezes the ball to protrude toward the inner side of the connecting tube (8), so that the ball is embedded in the limiting groove (11).

10. The water mist nozzle according to any one of claims 5 to 9, characterized in that: Three injection assemblies (7) are provided, and the three injection assemblies (7) are symmetrically arranged around the center of the base (5).

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