Anti-clogging nozzle for fire-fighting spray

Abstract

The utility model belongs to fire -fighting nozzle technical field especially relates to a kind of anti-blocking nozzle for fire-fighting sprinkling;Including nozzle main body, anti-blocking flow channel subassembly and sprinkling component, and nozzle main body inside is equipped with through water passage;Anti-blocking flow channel subassembly includes outer tube and inner tube, outer tube is connected with nozzle main body, inner tube is arranged in outer tube inside, and inner tube is connected with water passage and communicates;Inner tube diameter inner wall is equipped with multiple symmetrical tooth structure that is evenly distributed along circumference direction, tooth structure is extended and is arranged along water flow direction, for splitting water flow and reorienting water flow track, prevent foreign matter to be accumulated and be blocked at water passage and sprinkling component;Inner tube lower part outside is equipped with water guide passage, water guide passage is connected with tooth structure and communicates, and water guide passage is provided with several water inlets, and water inlet is connected with water passage and communicates.The utility model provides a kind of anti-blocking nozzle for fire-fighting sprinkling with active anti-blocking function, can effectively avoid foreign matter accumulation and block, without complex maintenance, can guarantee water flow unobstructed.

Description

Technical Field

[0001] This utility model belongs to the field of fire sprinkler technology, and in particular relates to an anti-clogging sprinkler head for fire sprinklers. Background Technology

[0002] Fire sprinkler heads are the core components of automatic sprinkler systems, playing a crucial role in fire safety protection of various buildings such as large factories, workshops, halls, and high-rise buildings. When a fire occurs, the sprinkler heads can automatically activate and spray water, achieving early fire suppression by blocking flame penetration, absorbing heat and cooling, and blocking smoke, effectively reducing the risk of fire spread and loss of life and property.

[0003] In existing technologies, such as the fire sprinkler head disclosed in patent document CN0877U, although it can meet the basic function of spraying water for fire extinguishing, it still has significant defects in anti-clogging performance in practical applications. The internal flow channel and water spray structure design of this type of sprinkler head are relatively simple, lacking an effective mechanism for handling foreign objects in the water flow. When impurities, sediments, or foreign objects such as dust and debris from the external environment are mixed into the fire water, they are very likely to accumulate and clog in the flow channel and other key positions of the sprinkler head.

[0004] A more prominent problem is that these sprinkler heads, once clogged by foreign objects, cannot be detected and resolved quickly in a timely manner. Due to the concealed location of the blockage and the lack of proactive clearing or anti-clogging design, once a blockage occurs, the sprinkler head will be unable to spray water normally, directly causing the fire extinguishing function to fail and seriously threatening fire safety. In this case, the sprinkler head must be disassembled and repaired manually to remove the foreign objects before its performance can be restored. This is not only cumbersome and time-consuming, but may also delay the initial fire suppression efforts due to untimely repairs, further amplifying the disaster damage. At the same time, frequent disassembly and repair also increases the maintenance costs of the sprinkler head wear and tear, affecting the long-term stable operation of the fire protection system. Therefore, addressing the problems of existing fire sprinkler heads being prone to clogging, difficult to quickly resolve after clogging, and requiring disassembly and repair to restore water flow, there is an urgent need to design an anti-clogging sprinkler head for fire sprinklers with proactive anti-clogging function, effectively preventing the accumulation of foreign objects and ensuring smooth water flow without complex maintenance. This would improve the reliability and emergency response efficiency of the fire sprinkler system and meet the urgent needs of actual fire safety protection. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned technical problems by providing a fire sprinkler head with active anti-clogging function, which can effectively prevent the accumulation and blockage of foreign objects and ensure smooth water flow without complicated maintenance.

[0006] In view of this, the present invention provides an anti-clogging sprinkler head for fire sprinkler system, including a sprinkler head body, an anti-clogging flow channel assembly and a spray assembly. The sprinkler head body has a through water flow channel inside, the anti-clogging flow channel assembly is fixedly installed in the middle section of the water flow channel, and the spray assembly is connected to the water outlet end of the sprinkler head body and is connected to the water flow channel. The anti-clogging flow channel assembly includes an outer tube and an inner tube. The outer tube is connected to the nozzle body, and the inner tube is located inside the outer tube and is connected to the water flow channel. The inner wall of the inner tube has multiple symmetrical tooth structures evenly distributed circumferentially. The tooth structures extend along the water flow direction to split the water flow and redirect the water flow trajectory, preventing foreign objects from accumulating and clogging the water flow channel and spray assembly. A water intake channel is provided on the lower outer side of the inner tube. The water intake channel is connected to the tooth structure and has several water inlet holes, which are connected to the water flow channel.

[0007] In the above technical solution, the tooth structure is further shaped as a triangular prism with its tip pointing towards the direction of water flow. A diversion channel is formed between two adjacent tooth structures. The width of the diversion channel gradually increases from the inflow end to the outflow end, and the diversion channel is connected to the water diversion channel.

[0008] In any of the above technical solutions, the number of tooth structures is 4-8, and all tooth structures have the same height.

[0009] In any of the above technical solutions, the outer tube and the nozzle body are further detachably connected. The outer wall of the nozzle body is provided with an external thread, and the inner wall of the outer tube is provided with an internal thread that matches the external thread. The two are fixed by threaded engagement.

[0010] In any of the above technical solutions, a further feature is provided on the lower side of the inner tube, with a detachable filter screen covering the water inlet end of the water flow channel and located below the water intake channel and the water inlet hole.

[0011] In any of the above technical solutions, further, the top surface of the filter screen is provided with multiple scrapers, the scrapers are connected to a drive shaft, the drive shaft is connected to a motor, and the outside of the motor is covered with a waterproof cover.

[0012] In any of the above technical solutions, a ball screw is further provided in the middle section of the drive shaft, a suitable nut is provided on the ball screw, and a pusher is provided on the outside of the nut. The pushers are evenly spaced along the circumferential direction of the nut. This is used to push foreign objects toward the filter screen when the scraper rotates. When the outer tube is separated from the nozzle body, the filter screen of the inner tube is removed, and the foreign objects are pushed out to the inner tube by the pusher. A connecting plate is provided on one side of the nut, a fixing plate is provided on the inner wall of the inner tube, a guide rod is provided on the fixing plate, and the connecting plate and the guide rod are slidably connected.

[0013] In any of the above technical solutions, the pusher is further connected to the nut via a movable connecting assembly. The movable connecting assembly includes multiple brackets disposed on the nut, and the brackets are provided with rotating shafts, which are connected to the pusher.

[0014] In any of the above technical solutions, the spray assembly further includes a spray plate and spray holes, the spray plate is fixedly connected to the water outlet end of the nozzle body, and the spray holes are evenly distributed on the spray plate.

[0015] The beneficial effects of this utility model are: 1. The symmetrical tooth structure on the inner wall of the inner tube can effectively split the water flow and redirect its trajectory. Combined with the gradually expanding diversion channel, it not only ensures the efficiency of water flow but also prevents foreign objects from accumulating and clogging the channel, thus solving the problem of easy clogging of traditional nozzles from the source.

[0016] 2. The design of the water diversion channel and the water inlet hole creates auxiliary turbulence, which further improves the anti-clogging effect and prevents foreign objects from adhering.

[0017] 3. The detachable threaded connection between the outer tube and the nozzle body facilitates subsequent maintenance or replacement of the anti-clogging flow channel component. The operation is simple and convenient, without the need to completely disassemble the nozzle, thus reducing the difficulty of maintenance.

[0018] 4. The filter screen achieves preliminary filtration of the water flow, intercepting larger foreign objects. Combined with the rotating scraper, it can clean the surface of the filter screen in real time, preventing the filter screen from clogging itself and further improving the comprehensiveness of anti-clogging.

[0019] 5. The ball screw, nut, and pusher mechanism work together to push foreign objects to a designated location while the scraper cleans them, facilitating centralized cleaning. Furthermore, it allows for quick removal of foreign objects after the filter screen is disassembled, solving the tedious problem of manual disassembly and cleaning required for traditional nozzles after clogging, thus shortening cleaning time and reducing maintenance costs. 6. The waterproof cover design ensures stable motor operation, and the cooperation between the guide rod and connecting plate ensures smooth movement of the nut and pusher. The overall structure is tightly fitted, improving the reliability and service life of the device. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a three-dimensional structural diagram of the anti-clogging flow channel component of this utility model; Figure 4 This is an exploded view of the present invention; Figure 5 This is a bottom view of the present invention; Figure 6This is a three-dimensional structural diagram of the movable connection component of this utility model; The attached diagram is labeled as follows: 1. Nozzle body; 11. Water flow channel; 2. Anti-clogging flow channel assembly; 21. Outer pipe; 22. Inner pipe; 23. Tooth structure; 24. Water intake channel; 25. Water inlet hole; 26. Diverter groove; 3. Spray assembly; 31. Spray disc; 32. Spray hole; 4. External thread; 5. Internal thread; 6. Filter screen; 7. Scraper; 71. Drive shaft; 72. Motor; 73. Waterproof cover; 8. Ball screw; 81. Nut; 82. Push frame; 83. Connecting plate; 84. Fixing plate; 85. Guide rod; 9. Movable connection assembly; 91. Bracket; 92. Rotating shaft. Detailed Implementation

[0021] Example 1: like Figures 1-5 As shown, this embodiment provides an anti-clogging sprinkler head for fire sprinkler system, including a sprinkler head body 1, an anti-clogging flow channel assembly 2, and a spray assembly 3. The sprinkler head body 1 has a through water flow channel 11 inside. The anti-clogging flow channel assembly 2 is fixedly installed in the middle section of the water flow channel 11. The spray assembly 3 is connected to the water outlet end of the sprinkler head body 1 and is connected to the water flow channel 11. The anti-clogging flow channel assembly 2 includes an outer tube 21 and an inner tube 22. The outer tube 21 is connected to the nozzle body 1, and the inner tube 22 is located inside the outer tube 21 and is connected to the water flow channel 11. The inner wall of the inner tube 22 is provided with a plurality of symmetrical tooth structures 23 evenly distributed in the circumferential direction. The tooth structures 23 extend along the water flow direction to split the water flow and redirect the water flow trajectory, preventing foreign objects from accumulating and clogging the water flow channel 11 and the spray assembly 3. A water intake channel 24 is provided on the lower outer side of the inner tube 22. The water intake channel 24 is connected to the tooth structures 23, and the water intake channel 24 has a plurality of water inlet holes 25, which are connected to the water flow channel 11.

[0022] like Figure 3 As shown, in this embodiment, the optimized tooth structure 23 is triangular prism-shaped with its tip facing the direction of water flow. A diversion channel 26 is formed between two adjacent tooth structures 23. The width of the diversion channel 26 gradually increases from the inflow end to the outflow end, and the diversion channel 26 is connected to the water diversion channel 24.

[0023] like Figure 3 As shown, in this embodiment, the optimized number of tooth structures 23 is 4-8, and all tooth structures 23 have the same height.

[0024] like Figure 4 and Figure 5As shown, in this embodiment, the outer tube 21 and the nozzle body 1 are detachably connected. The outer wall of the nozzle body 1 is provided with an external thread 4, and the inner wall of the outer tube 21 is provided with an internal thread 5 that matches the external thread 4. The two are fixed by threaded engagement.

[0025] In this technical solution, the fire sprinkler anti-clogging nozzle of this embodiment mainly consists of a nozzle body 1, an anti-clogging flow channel assembly 2, and a spray assembly 3. The nozzle body 1 has a through water flow channel 11 inside, providing a flow path for fire-fighting water. Its two ends correspond to the water inlet and outlet of the nozzle body 1, respectively. The anti-clogging flow channel assembly 2 is fixedly installed in the middle section of the water flow channel 11 and is the core component for achieving the anti-clogging function. The spray assembly 3 is connected to the outlet of the nozzle body 1 and maintains communication with the water flow channel 11, used to evenly spray the treated water.

[0026] The anti-clogging flow channel assembly 2 includes an outer pipe 21 and an inner pipe 22. The outer pipe 21 is used to connect and fix to the nozzle body 1. The inner pipe 22 is coaxially arranged inside the outer pipe 21, and its internal channel is connected to the water flow channel 11 to ensure smooth water flow. The inner wall of the inner pipe 22 has multiple symmetrical tooth structures 23 evenly distributed circumferentially. The tooth structures 23 extend along the water flow direction and are specifically triangular prism-shaped, with their tips pointing towards the water inflow direction. A diversion groove 26 is formed between adjacent tooth structures 23, and the width of the diversion groove 26 gradually increases from the inflow end to the outflow end. The number of tooth structures 23 is set to 4-8, and the height of all tooth structures 23 is consistent to ensure uniform water flow distribution.

[0027] The outer tube 21 and the nozzle body 1 are connected by a detachable threaded connection. The outer wall of the nozzle body 1 has an external thread 4 at a corresponding position, and the inner wall of the outer tube 21 has an internal thread 5 that matches the external thread 4. The two are securely fixed through the threaded engagement, which also facilitates subsequent disassembly, maintenance, or component replacement. The lower outer side of the inner tube 22 is also provided with a water inlet channel 24, which is connected to the tooth structure 23. Several water inlet holes 25 are opened on the water inlet channel 24, which are connected to the water flow channel 11 to form an auxiliary water flow channel 11.

[0028] Working principle When the fire suppression system is activated, water flows from the inlet end of the sprinkler head body 1 into the water flow channel 11, and first enters the inner pipe 22 of the anti-clogging flow channel assembly 2. When the water flows into contact with the toothed structure 23 on the inner wall of the inner pipe 22, the triangular prism-shaped toothed structure 23 splits the water flow, dividing the originally concentrated water flow into multiple branches, and at the same time redirecting the water flow trajectory. As the width of the diversion channel 26 gradually increases from the inlet end to the outlet end, the flow velocity of the water in the diversion channel 26 will be gradually adjusted to avoid the deposition of foreign matter due to sudden changes in flow velocity.

[0029] During this process, impurities, debris, and other foreign objects in the water flow are blocked by the tooth structure 23 and move with the diverted water flow, preventing them from accumulating on the inner wall of the water flow channel 11 or at the inlet of the spray assembly 3. Simultaneously, some water flows through the water inlet channel 24 into the water inlet hole 25, and then converges into the water flow channel 11, creating localized turbulence. This further prevents foreign objects from adhering to the surface of the tooth structure 23 or the inner wall of the inner tube 22, ensuring that the water flow channel 11 remains unobstructed. The water flow, after being processed by the tooth structure 23, smoothly flows through the inner tube 22 into the spray assembly 3, ultimately achieving stable water spraying.

[0030] Example 2: This embodiment provides an anti-clogging sprinkler head for fire sprinklers, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0031] like Figure 2 and Figure 6 As shown, in this embodiment, the inner tube 22 is optimized to have a detachable filter screen 6 on the lower side inside. The filter screen 6 covers the water inlet end of the water flow channel 11 and is located below the water intake channel 24 and the water inlet hole 25.

[0032] like Figure 2 and Figure 6 As shown, in this embodiment, the top surface of the filter screen 6 is provided with multiple scrapers 7, the scrapers 7 are connected to a drive shaft 71, the drive shaft 71 is connected to a motor 72, and the motor 72 is covered with a waterproof cover 73.

[0033] like Figure 2 and Figure 6 As shown, in this embodiment, the optimized transmission shaft 71 is provided with a ball screw 8 in the middle section, and a matching nut 81 is provided on the ball screw 8. A pusher 82 is provided on the outside of the nut 81, and the pusher 82 is evenly distributed along the circumferential direction of the nut 81. It is used to push foreign objects toward the filter screen 6 when the scraper 7 rotates. When the outer tube 21 is separated from the nozzle body, the filter screen 6 of the inner tube 22 is removed, and the foreign objects are pushed out to the inner tube 22 by the pusher 82. A connecting plate 83 is provided on one side of the nut 81, and a fixing plate 84 is provided on the inner wall of the inner tube 22. A guide rod 85 is provided on the fixing plate 84, and the connecting plate 83 and the guide rod 85 are slidably connected.

[0034] like Figure 6 As shown, in this embodiment, the pusher 82 is connected to the nut 81 via a movable connecting assembly 9. The movable connecting assembly 9 includes a plurality of brackets 91 disposed on the nut 81. A rotating shaft 92 is provided on the bracket 91 and connected to the pusher 82.

[0035] In this technical solution, a detachable filter screen 6 is provided on the lower side of the inner tube 22. The filter screen 6 completely covers the water inlet end of the water flow channel 11 and is located below the water intake channel 24 and the water inlet hole 25. It is used to perform preliminary filtration of the incoming water flow and intercept larger foreign objects. Multiple scrapers 7 are provided on the top surface of the filter screen 6. The scrapers 7 are evenly distributed on the top surface of the filter screen 6. One end of the scraper 7 is connected to a drive shaft 71, and the other end of the drive shaft 71 is connected to a motor 72. The motor 72 provides power for the rotation of the scrapers 7. The motor 72 is covered with a waterproof cover 73. The waterproof cover 73 can effectively prevent water from entering the motor 72, avoid short-circuiting and damaging the motor 72, and ensure stable operation of the motor 72.

[0036] A ball screw 8 is located in the middle section of the drive shaft 71. A matching nut 81 is fitted onto the ball screw 8. A pusher 82 is located on the outer side of the nut 81. The pushers 82 are evenly spaced along the circumferential direction of the nut 81 and are connected to the nut 81 via a movable connecting assembly 9. The movable connecting assembly 9 includes multiple brackets 91 mounted on the nut 81. A rotating shaft 92 is mounted on each bracket 91. One end of the pusher 82 is connected to the rotating shaft 92, allowing the pusher 82 to rotate around the rotating shaft 92 for angle adjustment. A fixing plate 84 is located on the inner wall of the inner tube 22 at a corresponding position. A guide rod 85 is mounted on the fixing plate 84. A connecting plate 83 is located on one side of the nut 81. The connecting plate 83 has a guide hole that matches the guide rod 85. The connecting plate 83 is slidably connected to the guide rod 85, providing guidance for the axial movement of the nut 81.

[0037] Working principle During normal operation of the nozzle, the motor 72 starts and drives the drive shaft 71 to rotate. The drive shaft 71 drives the scraper 7 to rotate synchronously. The scraper 7 rotates on the top surface of the filter screen 6, which can promptly scrape off larger foreign objects trapped on the surface of the filter screen 6, preventing the filter screen 6 from being blocked and ensuring that the water can smoothly pass through the filter screen 6 and enter the inner pipe 22. At the same time, the rotation of the drive shaft 71 drives the ball screw 8 to rotate. The ball screw 8 cooperates with the nut 81 to convert the rotational motion into the axial movement of the nut 81. The nut 81 reciprocates along the guide rod 85 through the connecting plate 83, thereby driving the pusher 82 to move synchronously.

[0038] During axial movement, the pusher 82 pushes the foreign objects scraped off the surface of the filter screen 6 by the scraper 7 towards the edge of the filter screen 6, preventing the foreign objects from accumulating in the central area of ​​the filter screen 6. When it is necessary to thoroughly clean the foreign objects, the outer tube 21 can be removed through the threaded connection between the outer tube 21 and the nozzle body 1, and then the filter screen 6 in the inner tube 22 can be taken out. At this time, the motor 72 is started again, and the pusher 82, with the cooperation of axial movement and its own rotation, can push the foreign objects accumulated on the edge of the filter screen 6 to the outside of the inner tube 22, realizing the rapid cleaning of foreign objects without complicated disassembly operations.

[0039] Example 3: This embodiment provides an anti-clogging sprinkler head for fire sprinklers, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0040] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in this embodiment, the optimized spray assembly 3 includes a spray plate 31 and spray holes 32. The spray plate 31 is fixedly connected to the water outlet end of the nozzle body 1, and the spray holes 32 are evenly distributed on the spray plate 31.

[0041] In this technical solution, the spray assembly 3 specifically includes a spray disc 31 and spray holes 32. The spray disc 31 is disc-shaped and fixedly connected to the water outlet end of the nozzle body 1. The connection method can be welding or threaded fixing to ensure a stable connection and avoid loosening caused by water flow impact. The spray holes 32 are evenly distributed on the spray disc 31. The number of spray holes 32 is reasonably set according to the spray range and flow rate requirements of the nozzle, and the axis of the spray holes 32 is at a certain angle to the disc surface of the spray disc 31 to ensure uniform water coverage.

[0042] Working principle After being processed by the anti-clogging flow channel component 2, the water flows smoothly through the water flow channel 11 to the outlet end of the nozzle body 1 and enters the spray plate 31 of the spray assembly 3. Since the spray holes 32 are evenly distributed on the spray plate 31, the water flows out through each spray hole 32 under water pressure, forming a uniform spray area. Combined with the function of the preceding anti-clogging flow channel component 2, there are no obvious foreign objects in the water flow, and the water flow is stable. This prevents some spray holes 32 from malfunctioning due to blockage by foreign objects, ensuring that all spray holes 32 can spray water normally and achieve the expected fire extinguishing effect.

[0043] The sprinkler plate 31, in conjunction with the evenly distributed sprinkler holes 32, ensures uniform water coverage and improves fire extinguishing efficiency. Because the preceding anti-clogging flow channel assembly 2 has already treated the water flow to prevent clogging, foreign objects are prevented from blocking the sprinkler holes 32, ensuring that the sprinkler assembly 3 always maintains good working condition and eliminates the need for frequent cleaning of the sprinkler holes 32. The sprinkler assembly 3 has a simple and reliable structural design, a secure connection with the sprinkler head body 1, and can adapt to the high-pressure water flow environment during fire extinguishing, further ensuring the stable operation of the fire sprinkler system. The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A fire sprinkler head designed to prevent clogging, characterized in that, The device includes a nozzle body (1), an anti-clogging flow channel assembly (2), and a spray assembly (3). The nozzle body (1) has a through water flow channel (11) inside. The anti-clogging flow channel assembly (2) is fixedly installed in the middle section of the water flow channel (11). The spray assembly (3) is connected to the water outlet end of the nozzle body (1) and communicates with the water flow channel (11). The anti-clogging flow channel assembly (2) includes an outer tube (21) and an inner tube (22). The outer tube (21) is connected to the nozzle body (1). The inner tube (22) is located inside the outer tube (21) and is connected to the water flow channel (11). The inner wall of the inner tube (22) is provided with a plurality of symmetrical tooth structures (23) evenly distributed in the circumferential direction. The tooth structures (23) extend along the water flow direction to split the water flow and redirect the water flow trajectory, preventing foreign objects from accumulating and clogging in the water flow channel (11) and the spray assembly (3). The lower outer side of the inner tube (22) is provided with a water intake channel (24). The water intake channel (24) is connected to the tooth structure (23), and the water intake channel (24) is provided with a plurality of water inlet holes (25). The water inlet holes (25) are connected to the water flow channel (11).

2. The anti-clogging sprinkler head for fire sprinkler system according to claim 1, characterized in that, The tooth structure (23) is triangular prism-shaped with its tip facing the direction of water flow. A diversion channel (26) is formed between two adjacent tooth structures (23). The width of the diversion channel (26) gradually increases from the inflow end to the outflow end, and the diversion channel (26) is connected to the water diversion channel (24).

3. The anti-clogging sprinkler head for fire sprinkler system according to claim 2, characterized in that, The number of tooth structures (23) is 4-8, and all tooth structures (23) have the same height.

4. The anti-clogging sprinkler head for fire sprinkler system according to claim 1, characterized in that, The outer tube (21) and the nozzle body (1) are detachably connected. The outer wall of the nozzle body (1) is provided with an external thread (4), and the inner wall of the outer tube (21) is provided with an internal thread (5) that matches the external thread (4). The two are fixed by threaded engagement.

5. The anti-clogging sprinkler head for fire sprinkler system according to claim 1, characterized in that, The inner tube (22) is provided with a filter screen (6) on the lower side inside. The filter screen (6) covers the water inlet end of the water flow channel (11) and is located below the water inlet channel (24) and the water inlet hole (25).

6. A fire sprinkler head for preventing clogging according to claim 5, characterized in that, The top surface of the filter screen (6) is provided with multiple scrapers (7), the scrapers (7) are connected to a drive shaft (71), the drive shaft (71) is connected to a motor (72), and the motor (72) is covered with a waterproof cover (73).

7. A fire sprinkler head for preventing clogging according to claim 6, characterized in that, The transmission shaft (71) is provided with a ball screw (8) in the middle section. The ball screw (8) is provided with a matching nut (81). The nut (81) is provided with a pusher (82) on the outside. The pushers (82) are evenly distributed along the circumferential direction of the nut (81). The nut (81) is provided with a connecting plate (83) on one side. The inner wall of the inner tube (22) is provided with a fixing plate (84). The fixing plate (84) is provided with a guide rod (85). The connecting plate (83) and the guide rod (85) are slidably connected.

8. A fire sprinkler head for preventing clogging according to claim 7, characterized in that, The pusher (82) is connected to the nut (81) via a movable connecting assembly (9). The movable connecting assembly (9) includes a plurality of brackets (91) disposed on the nut (81). The brackets (91) are provided with a rotating shaft (92), which is connected to the pusher (82).

9. A fire sprinkler head for preventing clogging according to claim 1, characterized in that, The spray assembly (3) includes a spray plate (31) and spray holes (32). The spray plate (31) is fixedly connected to the water outlet end of the nozzle body (1), and the spray holes (32) are evenly distributed on the spray plate (31).

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