Reentrainment suppression device capable of being widely applied to bulk material conveying
By designing a secondary dust suppression device that combines sliding dustproof plates and spray heads, the dust problem in the bulk material conveying system is solved, effective dust suppression and stable operation of the device are achieved, and environmental pollution and safety risks are reduced.
Patent Information
- Application Number
- CN202510628512.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-15
- Publication Date
- 2025-08-19
AI Technical Summary
There are secondary dust problems in the traditional open bulk material conveying system, resulting in environmental pollution, safety hazards and health risks, and existing dust suppression devices are difficult to effectively solve.
A secondary dust suppression device including the main connecting pipe, adapter assembly and control assembly is designed. Through the cooperation of the sliding dustproof plate and the spray head, the dustproof plate is automatically closed and the isolation net vibration is realized to prevent dust from entering the adapter box and ensure that the spray head is not contaminated.
Effectively prevent dust from entering the adapter box, reduce spray head blockage, improve dust suppression effect, ensure stable operation of the device, and reduce the risk of environmental pollution.
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Figure CN120504188A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of dust suppression, in particular to a secondary dust suppression device that can be widely applied to bulk material transportation. Background Art
[0002] Dust suppression devices effectively reduce dust dispersion during construction and transportation, improving air quality through spraying, covering, or adsorption. These devices typically involve installing fixed spray systems, mobile sprinklers, or laying dust screens. The spraying frequency and coverage are adjusted based on the area being worked on and the level of dust. They are easy to operate and environmentally friendly.
[0003] Traditional open bulk material conveying systems generally have the problem of secondary dust emission. During the conveying process, due to factors such as equipment vibration and flow disturbance, fine particles in the material flow will fly and float in the air, causing on-site environmental pollution. This seriously affects the safe and stable operation of the material conveying system, endangers the health of workers, and also brings the risk of fire and explosion. Summary of the Invention
[0004] To this end, the present invention provides a secondary dust suppression device that can be widely applied to bulk material conveying to solve the above-mentioned problems in the prior art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a secondary dust suppression device that can be widely used in bulk material transportation includes a main connecting pipe, an electric control device and a solenoid valve are provided on the surface of the main connecting pipe, and brackets are provided at the bottom of both ends of the main connecting pipe, and universal wheels are provided at the bottom of the brackets;
[0006] It also includes an adapter component for adapting to conveying channels of different sizes when suppressing dust;
[0007] The control component is used to prevent dust from being suppressed and ensure that the dust suppression effect is more stable.
[0008] The top end of the chain gear is fixedly mounted on the support frame, and the bottom end of the chain gear is fixedly mounted on the support frame, and the frame is connected with the support frame to the upper and lower surfaces of the chain gear of the chain gear.
[0009] Furthermore, the end of the hinged rod 2 away from the pull rod is hinged with a connecting block, and an active cavity is opened on the inner side of the adapter box;
[0010] Furthermore, the inner side of the movable cavity is slidably connected to a ramp block, the ramp block is fixedly connected to the connecting block, the connecting blocks are in two groups, and the two groups of connecting blocks are respectively fixedly connected to the two sides of the ramp block, the top surface of the connecting block is fixedly connected to a second spring, and the end of the second spring away from the connecting block is fixedly connected to the inner side of the movable cavity;
[0011] Furthermore, a limiting rod is fixedly connected to the inner side of the movable cavity, the limiting rod passes through the inclined block and is slidably connected, and a baffle is fixedly connected to the bottom end of the limiting rod;
[0012] Furthermore, the control assembly includes a guide rail, the guide rail is fixedly connected to the side of the adapter box, the guide rail passes through and is slidably connected to a slider, the inner side of the slider is fixedly connected to a connecting rod, and the connecting rod passes through and is slidably connected to the lifting platform;
[0013] Furthermore, the top surface of the connecting rod is fixedly connected to a resistance block, the bottom surface of the resistance block is fixedly connected to a second cylinder, and the output shaft of the second cylinder is fixedly connected to the top surface of the lifting platform;
[0014] Furthermore, a spray head is fixedly connected to the bottom surface of the lifting platform, a resisting rod is fixedly connected to the surface of the spray head, a rotating sleeve is rotatably connected to the inner side of the slider, an arc-shaped groove is opened on the inner side of the rotating sleeve, and the resisting rod is inserted into the inner side of the arc-shaped groove;
[0015] Furthermore, the bottom surface of the rotating sleeve is fixedly connected to an upper protrusion, the inner side of the sliding block is slidably connected to an isolation net, and the top surface of the isolation net is fixedly connected to a lower protrusion;
[0016] Furthermore, a fixing ring is fixedly connected to the inner side of the slider, a spring three is fixedly connected between the fixing ring and the isolation net, a bellows is passed through and fixedly connected to the surface of the sprinkler head, a movable groove is opened on the surface of the adapter box, and the bellows passes through the movable groove and is fixedly connected to the main connecting pipe.
[0017] Compared with the existing technology, it has the following beneficial effects:
[0018] 1. The secondary dust suppression device can be widely used in bulk material conveying. When the pull rod is pulled by the hinged rod 2, the hinged rod 1 is forced to rotate and pull the dust shield, and the dust shield is penetrated by the support rod and slidably connected, so that the dust shield can only slide along the support rod and compress the spring 1. As the symmetrical dust shield is gradually pulled apart, it can first ensure that the slider can move freely. At the same time, after the slider drives the inclined plane block to slide a certain distance through the connecting rod, it no longer conflicts with the inclined plane block. The compressed spring 2 will push the connecting block to reset, and the compressed spring 1 will push the dust shield to reset, thereby achieving that the slider can move freely and the dust shield will automatically close except for the position where the slider is located, to prevent dust from entering the adapter box and causing the sprinkler head to be contaminated by dust and blocked.
[0019] 2. This secondary dust suppression device can be widely used in bulk material conveying. The compressed spring will push the dustproof plate to reset, so that the slider can move freely and the dustproof plate will automatically close except for the position where the slider is located, preventing dust from entering the adapter box and causing the sprinkler head to be contaminated by dust and blocked. It ensures that the sprinkler head can adapt to different materials and conveyor belt positions while following the slider, and can also reduce the occurrence of sprinkler head blockage.
[0020] 3. This device can be widely used in secondary dust suppression for bulk material conveying. When cylinder 2 is started, cylinder 2 will push the lifting platform to drive the sprinkler head to gradually fit the isolation net. At the same time, the resistance rod fixed to the surface of the sprinkler head will resist the arc groove to force the rotating sleeve to rotate, thereby causing the upper protrusion at the bottom of the rotating sleeve to continuously resist the lower protrusion, so that the isolation net will vibrate continuously, vibrating the dust on the isolation net to prevent the dust from adhering to the isolation net, thereby improving the subsequent spraying and dust suppression effects of the sprinkler head. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.
[0022] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.
[0023] Figure 1 This is an overall stereoscopic diagram of a secondary dust suppression device of the present invention that can be widely applied to bulk material transportation.
[0024] Figure 2 This is a partially enlarged stereoscopic view of a secondary dust suppression device of the present invention that can be widely applied to bulk material transportation.
[0025] Figure 3 This is a three-dimensional view of the interior of an adapter box of a secondary dust suppression device of the present invention, which can be widely applied to bulk material conveying.
[0026] Figure 4 This is a sectional perspective view of an adapter box of a secondary dust suppression device of the present invention that can be widely applied to bulk material conveying.
[0027] Figure 5 This is an enlarged perspective view of a slider of a secondary dust suppression device of the present invention that can be widely used in bulk material transportation;
[0028] Figure 6 This is a sectional perspective view of a slider of a secondary dust suppression device of the present invention that can be widely applied to bulk material conveying;
[0029] Figure 7 This is an enlarged perspective view of a sectional view of a rotating sleeve of a secondary dust suppression device of the present invention, which can be widely applied to bulk material conveying.
[0030] Figure: 1. Main connecting pipe; 2. Adapter assembly; 21. Connecting plate; 22. Sliding frame; 23. Cylinder 1; 24. Adapter box; 25. Support rod; 26. Dust plate; 27. Spring 1; 28. Articulated rod 1; 29. Pull rod; 210. Limit buckle; 211. Articulated rod 2; 212. Connecting block; 213. Inclined block; 214. Limit rod; 215. Baffle; 216. Spring 2; 217. Active chamber; 3. Control assembly ;31. Guide rail;32. Slider;33. Connecting rod;34. Lifting platform;35. Resistance block;36. Cylinder 2;37. Resistance rod;38. Rotating sleeve;39. Arc groove;310. Upper protrusion;311. Isolation net;312. Lower protrusion;313. Fixed ring;314. Spring 3;315. Bellows;316. Movable groove;317. Sprinkler head;4. Electronic control device;5. Solenoid valve;6. Bracket;7. Universal wheel. DETAILED DESCRIPTION
[0031] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.
[0032] like Figures 1 to 5As shown, a secondary dust suppression device that can be widely used in bulk material conveying in the embodiment of the first aspect of the present invention includes a main connecting pipe 1, an electronic control device 4 and a solenoid valve 5 are provided on the surface of the main connecting pipe 1, and brackets 6 are provided at the bottom of both ends of the main connecting pipe 1, and a universal wheel 7 is provided at the bottom of the bracket 6; it also includes an adapter component 2 for adapting to conveying channels of different sizes when suppressing dust; and a control component 3 for preventing dust from being suppressed and ensuring that the dust suppression effect is more stable. The adapter assembly 2 includes a connecting plate 21, which is fixedly connected to the surface of the main connecting pipe 1. The main connecting pipe 1 passes through and is slidably connected to a sliding frame 22. The bottom surface of the connecting plate 21 is fixedly connected to a cylinder 1 23. The output shaft of the cylinder 1 23 is fixedly connected to the top surface of the sliding frame 22. The surface of the sliding frame 22 is fixedly connected to an adapter box 24. The inner side of the adapter box 24 is fixedly connected to a support rod 25. The support rod 25 passes through and is slidably connected to a dustproof plate 26. When the inclined block 213 contracts, it will drive the connecting block 212 to contract together, so that the connecting block 212 will compress the spring 216, and the connecting block 212 will pull the hinged rod 211, but the hinged The pull rod 29 hinged at the other end of rod 211 is located within the limit buckle 210, so that the limit buckle 210 limits the position of the pull rod 29 and the position where the pull rod 29 is hinged to the hinge rod 1 28. Then, as the pull rod 29 is pulled by the hinge rod 211, the hinge rod 1 28 is forced to rotate and pull the dust plate 26. The inner side of the dust plate 26 is hinged with the hinge rod 1 28, and the end of the hinge rod 1 28 away from the dust plate 26 is fixedly connected to the pull rod 29. The inner side of the adapter box 24 is fixedly connected to the limit buckle 210. The pull rod 29 passes through the limit buckle 210 and is slidably connected. The end of the pull rod 29 away from the hinge rod 1 28 is hinged to the hinge rod 2 211. The outer side of the support rod 25 is provided with a spring 1 27, one end of which is fixedly connected to the surface of the dust plate 26, and the other end of which is fixedly connected to the inner wall of the adapter box 24. One end of the hinged rod 211 away from the pull rod 29 is hingedly connected to a connecting block 212 , and an active cavity 217 is defined inside the adapter box 24 .The inner side of the movable cavity 217 is slidably connected with an inclined surface block 213, and the inclined surface block 213 is fixedly connected to the connecting block 212. There are two groups of connecting blocks 212, and the two groups of connecting blocks 212 are fixedly connected to the two sides of the inclined surface block 213 respectively. The top surface of the connecting block 212 is fixedly connected with a spring 216. When the interference block 35 slides following the connecting rod 33, it will gradually interfere with the inclined surface of the inclined surface block 213, thereby forcing the inclined surface block 213 to retract into the movable cavity 217. When the inclined surface block 213 retracts, it will drive the connecting block 212 to retract together, so that the connecting block 212 will compress the spring 216, and the end of the spring 216 away from the connecting block 212 is in contact with the movable cavity 217. 7 is fixedly connected to the inside of the movable cavity 217. When the pull rod 29 is pulled by the hinge rod 211, the hinge rod 1 28 is forced to rotate and pull the dust plate 26. The dust plate 26 is penetrated by the support rod 25 and is slidably connected, so that the dust plate 26 can only slide along the support rod 25 and compress the spring 1 27. As the symmetrical dust plate 26 is gradually pulled apart, it can first ensure that the slider 32 can move freely. At the same time, after the slider 32 drives the inclined surface block 213 to slide a certain distance through the connecting rod 33 and no longer interferes with the inclined surface block 213, the compressed spring 216 will push the connecting block 212 to return to its original position. At the same time, the compressed spring 1 27 will push the dust plate 26 to return to its original position. The inner side of the movable cavity 217 is fixedly connected to the limit rod 214. The limit rod 214 penetrates the inclined surface block 213 and is slidably connected. The bottom end of the limit rod 214 is fixedly connected to the baffle 215.
[0033] The control assembly 3 includes a guide rail 31, which is fixedly connected to the side of the adapter box 24. A slider 32 is inserted through the guide rail 31 and slidably connected. A connecting rod 33 is fixedly connected to the inner side of the slider 32. The connecting rod 33 inserts and slidably connects to the lifting platform 34. The top surface of the connecting rod 33 is fixedly connected to the interference block 35. First, the entire main connecting pipe 1 is pushed to move it above the material conveyor belt. Then, according to the position of the material on the material conveyor belt, the slider 32 can be moved. When the slider 32 is moved, the connecting rod 33 inside it will drive the interference block 35 to slide within the adapter box 24. The bottom surface of the interference block 35 is fixedly connected to the second cylinder 36, and the output shaft of the second cylinder 36 is fixedly connected to the top surface of the lifting platform 34. The bottom surface of the lifting platform 34 is fixedly connected to the spray head 317. When the slider 32 can move freely, the dustproof plate 26 will automatically close except for the position where the slider 32 is located to prevent dust from entering the adapter box 24 and causing the spray head 317 to be contaminated by dust and blocked. While ensuring that the spray head 317 can adapt to different materials and conveyor belt positions while following the slider 32, it can also reduce the occurrence of blockage of the spray head 317. The surface of the spray head 317 is fixedly connected to the resistance rod 37, and the inner side of the slider 32 is rotatably connected to the rotating sleeve 38. The inner side of the rotating sleeve 38 is provided with an arc groove 39, and the resistance rod 37 is inserted into the inner side of the arc groove 39. The bottom surface of the rotating sleeve 38 is fixedly connected with an upper protrusion 310, the inner side of the slider 32 is slidably connected with the isolation net 311, and the top surface of the isolation net 311 is fixedly connected with a lower protrusion 312. When dust suppression is performed, cylinder 2 36 is started, and cylinder 2 36 will push the lifting platform 34 to drive the sprinkler head 317 to gradually fit the isolation net 311. At the same time, the resistance rod 37 fixedly connected to the surface of the sprinkler head 317 will resist the arc groove 39 to force the rotating sleeve 38 to rotate, thereby causing the upper protrusion 310 at the bottom of the rotating sleeve 38 to continuously resist the lower protrusion 312, so that the isolation net 311 will continue to vibrate. A fixing ring 313 is fixedly connected to the inner side of the slider 32, a spring 314 is fixedly connected between the fixing ring 313 and the isolation net 311, a bellows 315 passes through and is fixedly connected to the surface of the sprinkler head 317, a movable groove 316 is opened on the surface of the adapter box 24, and the bellows 315 passes through the movable groove 316 and is fixedly connected to the main connecting pipe 1.
[0034] A secondary dust suppression device that can be widely used in bulk material conveying. When in use, first push the entire main connecting pipe 1 and move it above the material conveyor belt. Then, according to the position of the material on the material conveyor belt, the slider 32 can be toggled. When the slider 32 is toggled, the connecting rod 33 inside it will drive the resistance block 35 to slide in the adapter box 24. When the resistance block 35 slides with the connecting rod 33, it will gradually resist the inclined surface of the inclined surface block 213, thereby forcing the inclined surface block 213 to slide. 13 is retracted into the movable cavity 217. When the inclined surface block 213 is retracted, the connecting block 212 is also retracted, so that the connecting block 212 compresses the spring 216, and the connecting block 212 pulls the hinge rod 211. However, the pull rod 29 hinged at the other end of the hinge rod 211 is located in the limit buckle 210, so that the limit buckle 210 limits the position of the pull rod 29 and the hinged position of the pull rod 29 and the hinge rod 1 28. Then, as the pull rod 29 is hinged to the hinge rod 211, the hinge rod 29 is retracted. When the slider 32 is pulled open, the hinge rod 28 is forced to rotate and pull the dust plate 26, and the dust plate 26 is penetrated by the support rod 25 and slidably connected, so that the dust plate 26 can only slide along the support rod 25 and compress the spring 1 27. As the symmetrical dust plate 26 is gradually pulled open, it can first ensure that the slider 32 can move freely. At the same time, the slider 32 drives the inclined block 213 to slide a certain distance through the connecting rod 33 and no longer interferes with the inclined block 213. The compressed spring 216 pushes the connecting block 212 to return to its original position. At the same time, the compressed spring 1 27 pushes the dust plate 26 to return to its original position, thereby achieving that the slider 32 can move freely. At the same time, the dust plate 26 will automatically close except for the position where the slider 32 is located, preventing dust from entering the adapter box 24 and causing the sprinkler head 317 to be contaminated by dust and blocked. This ensures that the sprinkler head 317 can adapt to different materials and conveyor belt positions while following the slider 32, and can also reduce the occurrence of sprinkler head 317 blockage.
[0035] When dust suppression is performed, cylinder 2 36 is started, and cylinder 2 36 will push the lifting platform 34 to drive the sprinkler head 317 to gradually fit the isolation net 311. At the same time, the resistance rod 37 fixedly connected to the surface of the sprinkler head 317 will resist the arc groove 39 to force the rotating sleeve 38 to rotate, thereby causing the upper protrusion 310 at the bottom of the rotating sleeve 38 to continuously resist the lower protrusion 312, so that the isolation net 311 will continuously vibrate, vibrating the dust on the isolation net 311 to prevent the dust from adhering to the isolation net 311, thereby improving the subsequent spraying and dust suppression effects of the sprinkler head 317.
[0036] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.
[0037] The terms "upper", "lower", "left", "right", "middle", etc. used in this specification are only for the convenience of description and are not intended to limit the scope of the present invention. Changes or adjustments to their relative relationships should be regarded as within the scope of the present invention without substantially changing the technical content.
Claims
1. A secondary dust suppression device widely applicable to bulk material conveying, comprising a main connecting pipe (1), the surface of which is provided with an electric control device (4) and a solenoid valve (5), characterized in that: The bottoms of both ends of the main connecting pipe (1) are provided with brackets (6), and the bottoms of the brackets (6) are provided with universal wheels (7); It also includes an adaptor component (2) for adapting to conveying channels of different sizes when suppressing dust; The control component (3) is used to ensure that the dust suppression effect is more stable during dust suppression.
2. The secondary dust suppression device widely applicable to bulk material transportation according to claim 1 is characterized in that: The adapter assembly (2) includes a connecting plate (21), the connecting plate (21) is fixedly connected to the surface of the main connecting pipe (1), the main connecting pipe (1) passes through and is slidably connected to a sliding frame (22), the bottom surface of the connecting plate (21) is fixedly connected to a cylinder 1 (23), the output shaft of the cylinder 1 (23) is fixedly connected to the top surface of the sliding frame (22), the surface of the sliding frame (22) is fixedly connected to an adapter box (24), the inner side of the adapter box (24) is fixedly connected to a support rod (25), the support rod (25) passes through and is slidably connected to a dustproof plate (26), the inner side of the dustproof plate (26) is fixedly connected to the support rod (25), and the inner side of the dustproof plate (26) is fixedly connected to the support rod (25). It is hinged with a hinge rod (28), and the end of the hinge rod (28) away from the dustproof plate (26) is fixedly connected to a pull rod (29). The inner side of the adapter box (24) is fixedly connected to a limit buckle (210), and the pull rod (29) passes through the limit buckle (210) and is slidably connected. The end of the pull rod (29) away from the hinge rod (28) is hinged to a hinge rod (211). The outer side of the support rod (25) is provided with a spring (27), one end of the spring (27) is fixedly connected to the surface of the dustproof plate (26), and the other end of the spring (27) is fixedly connected to the inner wall of the adapter box (24).
3. The secondary dust suppression device widely applicable to bulk material transportation according to claim 1 is characterized in that: The end of the hinged rod 2 (211) away from the pull rod (29) is hinged with a connecting block (212), and an active cavity (217) is opened on the inner side of the adapter box (24).
4. The secondary dust suppression device widely applicable to bulk material transportation according to claim 3 is characterized in that: The inner side of the movable cavity (217) is slidably connected to a slope block (213), and the slope block (213) is fixedly connected to the connecting block (212). The connecting blocks (212) are in two groups, and the two groups of connecting blocks (212) are respectively fixedly connected to both sides of the slope block (213). The top surface of the connecting block (212) is fixedly connected to a second spring (216), and one end of the second spring (216) away from the connecting block (212) is fixedly connected to the inner side of the movable cavity (217).
5. The secondary dust suppression device widely applicable to bulk material transportation according to claim 4 is characterized in that: The inner side of the movable cavity (217) is fixedly connected to a limiting rod (214), the limiting rod (214) passes through the inclined block (213) and is slidably connected, and the bottom end of the limiting rod (214) is fixedly connected to a baffle (215).
6. The secondary dust suppression device widely applicable to bulk material transportation according to claim 1 is characterized in that: The control assembly (3) includes a guide rail (31), the guide rail (31) is fixedly connected to the side of the adapter box (24), the guide rail (31) passes through and is slidably connected to a slider (32), the inner side of the slider (32) is fixedly connected to a connecting rod (33), and the connecting rod (33) passes through and is slidably connected to a lifting platform (34).
7. The secondary dust suppression device widely applicable to bulk material transportation according to claim 6 is characterized in that: The top surface of the connecting rod (33) is fixedly connected to a resistance block (35), the bottom surface of the resistance block (35) is fixedly connected to a second cylinder (36), and the output shaft of the second cylinder (36) is fixedly connected to the top surface of the lifting platform (34).
8. The secondary dust suppression device widely applicable to bulk material transportation according to claim 7 is characterized in that: The bottom surface of the lifting platform (34) is fixedly connected to a spray head (317), the surface of the spray head (317) is fixedly connected to a resistance rod (37), the inner side of the slider (32) is rotatably connected to a rotating sleeve (38), the inner side of the rotating sleeve (38) is provided with an arc groove (39), and the resistance rod (37) is inserted into the inner side of the arc groove (39).
9. The secondary dust suppression device widely applicable to bulk material transportation according to claim 8 is characterized in that: The bottom surface of the rotating sleeve (38) is fixedly connected to an upper protrusion (310), the inner side of the sliding block (32) is slidably connected to an isolation net (311), and the top surface of the isolation net (311) is fixedly connected to a lower protrusion (312).
10. The secondary dust suppression device widely applicable to bulk material transportation according to claim 9, characterized in that: A fixing ring (313) is fixedly connected to the inner side of the slider (32), a spring (314) is fixedly connected between the fixing ring (313) and the isolation net (311), a bellows (315) is passed through and fixedly connected to the surface of the sprinkler head (317), a movable groove (316) is provided on the surface of the adapter box (24), and the bellows (315) passes through the movable groove (316) and is fixedly connected to the main connecting pipe (1).