A muffler for an exhaust pipe

Abstract

The application relates to the technical field of sound attenuation devices, in particular to a sound attenuation device for an exhaust pipe, which comprises a rotating sound attenuation device installed in the interior of the exhaust pipe, the rotating sound attenuation device comprises a rotating driving base installed in the interior of the exhaust pipe, a limiting driving shaft is installed on the rotating driving base, a plurality of limiting installation grooves are arranged on the outer side of the limiting driving shaft and are uniformly distributed at equal intervals, an assembly mark is further arranged on the top of the limiting driving shaft, a plurality of spliced sound attenuation mechanisms which are mutually butted are installed on the limiting driving shaft, a limiting fixed cover is arranged on the top of the limiting driving shaft and is positioned and connected with the top of the driving shaft, a self-adapting shielding mechanism is installed on the bottom of the limiting fixed cover, and a noise detector is further installed on the self-adapting shielding mechanism. The application can effectively improve the sound attenuation effect and is convenient to maintain.

Description

Technical Field

[0001] This invention relates to the technical field of mufflers, and more specifically to a muffler for an exhaust pipe. Background Technology

[0002] In recent years, there has been an increasing number of LNG vessels used for purposes other than simple transportation, such as FSRUs (Floating Storage and Regasification Units) used to supply gas to land-based communities, or LNG bunkering vessels used to refuel large LNG-powered ships. These vessels often operate in low-lying areas close to densely populated regions, such as shore stations next to residential areas or cruise terminals where large numbers of tourists gather. In response, the regions where these vessels operate and some regulatory bodies have begun to develop corresponding regulations regarding the environmental impact of these vessels, particularly regarding emissions and noise requirements. Natural gas combustion towers are a major source of noise, exposed to the elements (the exhaust gases from combustion must be directly released into the atmosphere).

[0003] Chinese patent CN113530637B discloses a silencing device for the exhaust pipe of a natural gas combustion tower and its installation method. The silencing device includes a silencing component disposed within the exhaust pipe, a support frame mounted on top of the silencing component, and a deck support mounted on the deck surface. The silencing component includes a rectifying support cylinder and a set of reflective silencing plates. Multiple rectifying support cylinders are arranged inside the exhaust pipe, nested sequentially from the inside out. Multiple sets of reflective silencing plates are arranged along the airflow direction in the gaps between adjacent rectifying support cylinders and in the gap between the outermost rectifying support cylinder and the exhaust pipe. This invention allows most of the sound waves within the exhaust pipe to be reflected and attenuated multiple times within the silencing component before reaching the end of the exhaust pipe, effectively reducing the noise emitted into the atmosphere from the end of the natural gas combustion tower exhaust pipe.

[0004] Although the above-mentioned technical solution can reduce noise by refracting sound waves through the sound-absorbing plates and sound wave reflectors on the sound-absorbing components, the arrangement of the sound-absorbing plates and sound wave reflectors on the device is relatively simple, making it difficult to achieve the expected sound-absorbing effect. In addition, the structure of the device is connected by welding, and after long-term use, the sound-absorbing plates will accumulate dust and other foreign objects on their surface. When replacement is needed, it will cause trouble for later maintenance and make it difficult to replace the sound-absorbing plates and other components. Summary of the Invention

[0005] To address the problems existing in current technology, a muffler device for exhaust pipes is provided. By rotating the muffler device, the muffler effect can be effectively improved, while also facilitating maintenance.

[0006] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0007] A muffler for an exhaust pipe includes a rotary muffler installed inside the exhaust pipe. The rotary muffler includes a rotary drive seat installed inside the exhaust pipe. A limit drive shaft is mounted on the rotary drive seat. Several limit mounting slots are provided on the outer side of the limit drive shaft and are evenly distributed at equal intervals. An assembly mark is also provided on the top of the limit drive shaft. Several interlocking muffler mechanisms are mounted on the limit drive shaft. A limit fixing cover is provided on the top of the limit drive shaft and is positioned and connected to the top of the drive shaft. An adaptive shielding mechanism is installed at the bottom of the limit fixing cover, and a noise detector is also installed on the adaptive shielding mechanism.

[0008] Preferably, the rotary drive base includes a mounting bracket for mounting the exhaust pipe, a plurality of first ball bearings are distributed on the top of the mounting bracket, a guide bucket is mounted on the bottom of the mounting bracket, and an airflow fan is mounted at the axial position of the guide bucket.

[0009] Preferably, the splicing silencing mechanism includes a stable splicing base mounted on a limit drive shaft, a spiral silencing sleeve mounted on the stable splicing base, and the stable splicing base and the spiral silencing sleeve are spliced ​​together.

[0010] Preferably, the stable splicing base includes a mounting base, the mounting base has a first limiting hole at the axial center position, the first limiting hole matches the shape of the limiting drive shaft, the side of the mounting base is covered with second balls, and the top of the mounting base has several limiting blocks, which are evenly distributed at equal intervals around the first limiting hole.

[0011] Preferably, the spiral silencing sleeve includes a first limiting sleeve, inside which a second limiting sleeve and a mounting shaft are also provided. The second limiting sleeve and the mounting shaft are evenly coaxially arranged with the first limiting sleeve. The mounting shaft has a second limiting hole at its center, which has the same structure as the first limiting hole. The bottom of the second limiting sleeve has several limiting rails that fit with the limiting blocks of the mounting base. The inner wall of the limiting rails also has several lifting holes. Spiral silencing plates are distributed between the first limiting sleeve, the second limiting sleeve, and the mounting shaft. The spiral silencing plates have a sandwich structure, with a spiral silencing layer in the middle and a spiral sound wave reflector plate on the outer wall of the spiral silencing layer.

[0012] Preferably, the limiting and fixing cover includes several positioning blocks fixed to the outer wall of the exhaust pipe, each positioning block having a positioning hole. The limiting and fixing cover also includes a limiting mounting bracket for snapping onto the top of the exhaust pipe. The limiting mounting bracket has a limiting sleeve hole at its axial center and several exhaust holes distributed on it. A synchronous snapping mechanism is provided on the outer side of the limiting mounting bracket, and the snapping end of the synchronous snapping mechanism corresponds one-to-one with the positioning hole of the positioning block.

[0013] Preferably, the synchronous locking mechanism includes a pusher frame installed on the outside of the limiting mounting frame. Several positioning posts are also installed on the limiting mounting frame. The positioning posts and the positioning holes of the positioning blocks are coaxially arranged. A first spring is provided between the positioning posts and the limiting mounting frame. A positioning plug is provided at one end of the positioning post, and a pressing block is provided at the end of the positioning post away from the positioning plug.

[0014] Preferably, the push frame includes a rotating bracket rotatably mounted on the limiting mounting bracket, and the outside of the rotating bracket is provided with an arc-shaped push frame.

[0015] Preferably, the adaptive shielding mechanism includes a limiting mounting ring mounted on a limiting mounting bracket, with several rotating shielding plates mounted on the limiting mounting ring. Each rotating shielding plate corresponds to a vent hole on the limiting mounting bracket. The rotating shielding plates are provided with limiting grooves. The adaptive shielding mechanism also includes a positioning mounting post mounted at the axial position of the limiting mounting bracket. A pressing frame is mounted on the positioning mounting post, and the pressing frame is provided with several mounting pressing strips. The pressing frame strips abut against the limiting grooves of the rotating shielding plates. A second spring is provided between the pressing frame and the positioning mounting post.

[0016] Preferably, the rotating silencing device also includes a gripper for hoisting and replacing the splicing silencing mechanism. The gripper also includes a three-jaw chuck. A third limiting hole is provided at the axial center of the three-jaw chuck. The third limiting hole matches the shape of the limiting drive shaft. Several clamping blocks are installed on the gripping end of the three-jaw chuck. A camera is provided on the outer side of the three-jaw chuck.

[0017] The advantages of this application compared to the prior art are:

[0018] 1. When the ship starts, the exhaust pipe will generate airflow and exhaust sound. When the airflow and exhaust sound pass through the rotary drive seat, the rotary drive seat will rotate due to the influence of the airflow. When the rotary drive seat rotates, it will drive the limit drive shaft to rotate synchronously. When the limit drive shaft rotates, it will drive the splicing silencer mechanism to rotate synchronously. When the airflow and exhaust sound enter the rotating splicing silencer mechanism, the splicing silencer mechanism will guide the gas to be discharged smoothly. The sound waves in the exhaust sound will be attenuated and eliminated in the rotating splicing silencer mechanism. The rotating splicing silencer mechanism can effectively ensure the sound wave attenuation effect and improve the silencer effect.

[0019] 2. If excessive noise occurs, it indicates that the splicing silencing mechanism needs to be replaced or repaired. The rotating silencing device can be disassembled and the splicing silencing mechanism replaced using hoisting equipment to restore the silencing effect and facilitate routine maintenance. Attached Figure Description

[0020] Figure 1 This is a front view of a muffler used for exhaust pipes.

[0021] Figure 2 yes Figure 1Sectional view at section AA.

[0022] Figure 3 This is a three-dimensional schematic diagram of a rotary drive seat and a limit drive shaft in a muffler device used for exhaust pipes.

[0023] Figure 4 This is a three-dimensional schematic diagram of a muffler mechanism assembled in a muffler device used for exhaust pipes.

[0024] Figure 5 This is a three-dimensional schematic diagram of a spiral muffler sleeve in a muffler device used for exhaust pipes.

[0025] Figure 6 This is a three-dimensional schematic diagram of a spiral muffler plate in a muffler device used for exhaust pipes.

[0026] Figure 7 This is a three-dimensional schematic diagram of a stable splicing base used in a muffler device for exhaust pipes.

[0027] Figure 8 This is a three-dimensional schematic diagram of a limiting and fixing cover and an adaptive shielding mechanism in a muffler device for an exhaust pipe.

[0028] Figure 9 This is a three-dimensional schematic diagram of a limiting and fixing cover in a muffler device used for exhaust pipes.

[0029] Figure 10 This is a front view of a limiting and fixing cover used in a muffler device for exhaust pipes.

[0030] Figure 11 This is a three-dimensional schematic diagram of a pusher frame in a muffler device used for exhaust pipes.

[0031] Figure 12 This is a three-dimensional schematic diagram of a gripper used in a muffler for exhaust pipes.

[0032] The numbers on the map are:

[0033] 1-Exhaust pipe; 2-Rotary drive seat; 21-Mounting bracket; 211-First ball bearing; 22-Guide hopper; 23-Airflow fan; 3-Limit drive shaft; 31-Limit mounting groove; 4-Splicing silencer mechanism; 41-Stable splicing base; 411-Mounting base; 412-Limit block; 413-Second ball bearing; 414-First limit hole; 42-Spiral silencer sleeve; 421-First limit sleeve; 4222-Second limit sleeve; 4221-Limit rail; 4222-Lifting hole; 423-Mounting shaft; 4231-Second limit hole; 424-Spiral silencer plate; 4241-Spiral sound wave reflector plate; 4 242-Spiral silencing layer; 5-Limit fixing cover; 51-Limit mounting bracket; 52-Synchronous snap-fit ​​mechanism; 521-Same part push frame; 5211-Rotating bracket; 5212-Arc-shaped push frame; 522-Positioning post; 5221-Positioning plug; 5222-Pressure block; 523-First spring; 53-Positioning block; 531-Positioning hole; 6-Adaptive shielding mechanism; 61-Limit mounting ring; 62-Rotating shielding plate; 63-Positioning mounting post; 64-Pressing bracket; 65-Second spring; 7-Gripper; 71-Three-jaw chuck; 711-Third limit hole; 72-Clamping snap-fit ​​block; 73-Camera. Detailed Implementation

[0034] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figures 1 to 11 As shown:

[0036] A muffler for an exhaust pipe 1 includes a rotary muffler installed inside the exhaust pipe 1. The rotary muffler includes a rotary drive seat 2 installed inside the exhaust pipe 1. A limiting drive shaft 3 is installed on the rotary drive seat 2. Several limiting mounting grooves 31 are provided on the outer side of the limiting drive shaft 3 and are evenly distributed at equal intervals. An assembly mark is also provided on the top of the limiting drive shaft 3. Several interlocking muffler mechanisms 4 are installed on the limiting drive shaft 3. A limiting fixing cover 5 is provided on the top of the limiting drive shaft 3. The limiting fixing cover 5 is positioned and connected to the top of the drive shaft. An adaptive shielding mechanism 6 is installed at the bottom of the limiting fixing cover 5. A noise detector is also installed on the adaptive shielding mechanism 6.

[0037] When assembling the rotary muffler, the workers first install the rotary drive seat 2 and the limiting drive shaft 3 inside the exhaust pipe 1. Then, using hoisting equipment, they sequentially install multiple splicing muffler mechanisms 4 onto the limiting drive shaft 3. The limiting drive shaft 3 connects and stacks these multiple splicing muffler mechanisms 4 in series, forming a muffler channel. Assembly markings on the top of the limiting drive shaft 3 facilitate the workers' sequential assembly of the splicing muffler mechanisms 4, improving assembly and disassembly. After the splicing muffler mechanisms 4 are assembled, the workers install the limiting fixing cover 5 at the exhaust outlet of the exhaust pipe 1. The limiting fixing cover 5 also limits the top of the limiting drive shaft 3, ensuring its rotational stability. The adaptive shielding mechanism 6 adaptively shields the exhaust outlet, effectively preventing rainwater or foreign objects from falling into the exhaust pipe 1 and causing blockage. The noise detector is used to detect exhaust noise. Whether it meets the standards or not, after the rotary muffler is installed, when the ship starts, the exhaust pipe 1 will generate airflow and exhaust sound. When the airflow and exhaust sound pass through the rotary drive seat 2, the rotary drive seat 2 will rotate due to the airflow. When the rotary drive seat 2 rotates, it will drive the limit drive shaft 3 to rotate synchronously. When the limit drive shaft 3 rotates, it will drive the splicing muffler mechanism 4 to rotate synchronously. When the airflow and exhaust sound enter the rotating splicing muffler mechanism 4, the splicing muffler mechanism 4 will guide the gas to flow out smoothly. The sound waves in the exhaust sound will be attenuated and eliminated in the rotating splicing muffler mechanism 4. The rotating splicing muffler mechanism 4 can improve the sound wave attenuation effect. The noise detector can effectively detect whether the exhaust sound meets the standard. If the noise is too loud, it means that the splicing muffler mechanism 4 needs to be replaced or repaired. The staff can use the hoisting equipment to disassemble the rotary muffler and replace the splicing muffler mechanism 4 to restore the muffler effect. It is convenient for maintenance and replacement.

[0038] like Figure 2 and Figure 3 As shown:

[0039] The rotary drive base 2 includes a mounting bracket 21 for mounting the exhaust pipe 1. Several first ball bearings 211 are distributed on the top of the mounting bracket 21. A guide bucket 22 is mounted on the bottom of the mounting bracket 21. An airflow fan 23 is mounted at the axial position of the guide bucket 22.

[0040] The first ball bearing 211 on the mounting bracket 21 is used to limit and abut against the bottom of the splicing muffler mechanism 4, effectively reducing friction and ensuring the stability of the installation of the splicing muffler mechanism 4. The mounting bracket 21 is used to position and install inside the exhaust pipe 1, so that the limiting drive shaft 3 and the exhaust pipe 1 are coaxially set. The guide bucket 22 at the bottom of the mounting bracket 21 is used to concentrate the airflow to flow towards the airflow fan 23, so that the airflow fan 23 can rotate quickly and ensure rotational power. When the airflow fan 23 rotates, it drives the limiting drive shaft 3 to rotate synchronously. This effectively converts the flowing airflow into rotational kinetic energy, effectively saving power energy, saving energy damage, and reducing muffler costs.

[0041] like Figure 2 and Figure 4 As shown:

[0042] The splicing silencing mechanism 4 includes a stable splicing base 41 installed on the limit drive shaft 3, and a spiral silencing sleeve 42 installed on the stable splicing base 41. The stable splicing base 41 and the spiral silencing sleeve 42 are spliced ​​together.

[0043] If the noise detector detects excessive noise, it means that a large amount of foreign matter has adhered to the spiral muffler sleeve 42. The staff can restore the noise level by replacing the spiral muffler sleeve 42. The stable splicing base 41 and the spiral muffler sleeve 42 are detachable, which can effectively reduce replacement costs and ensure replacement efficiency.

[0044] like Figure 4 and Figure 7 As shown:

[0045] The stable splicing base 41 includes a mounting base 411. The mounting base 411 has a first limiting hole 414 at its axial center. The first limiting hole 414 matches the shape of the limiting drive shaft 3. The side of the mounting base 411 is covered with second balls 413. The top of the mounting base 411 has several limiting blocks 412. The limiting blocks 412 are evenly distributed at equal intervals around the first limiting hole 414.

[0046] The limiting block 412 on the mounting base 411 is used to splice and install the spiral muffler sleeve 42. After the spiral muffler sleeve 42 and the mounting base 411 are installed, the spiral muffler sleeve 42 and the mounting base 411 are lifted together by the hoisting equipment. The first limiting hole 414 of the mounting base 411 is used to limit the docking and limiting drive shaft 3. When the mounting base 411 and the spiral muffler sleeve 42 are installed into the exhaust pipe 1, the second ball bearing 413 on the outer wall of the mounting base 411 will abut against the inner wall of the exhaust pipe 1, which can effectively reduce the friction.

[0047] like Figures 4 to 6 As shown:

[0048] The spiral silencer sleeve 42 includes a first limiting sleeve 421. Inside the first limiting sleeve 421, there is also a second limiting sleeve 422 and a mounting shaft 423. The second limiting sleeve 422 and the mounting shaft 423 are evenly coaxially arranged with the first limiting sleeve 421. The axis of the mounting shaft 423 has a second limiting hole 4231, which has the same structure as the first limiting hole 414. The bottom of the second limiting sleeve has several limiting rails 4221. The 4221 is matched with the limiting block 412 of the mounting base 411. The inner wall of the limiting rail 4221 is also provided with several lifting holes 4222. The first limiting sleeve 421, the second limiting sleeve 422 and the mounting shaft 423 are all covered with spiral silencing plates 424. The spiral silencing plates 424 have a sandwich structure. The middle of the spiral silencing plates 424 is a spiral silencing layer 4242. The outer wall of the spiral silencing layer 4242 is adjusted with a spiral sound wave reflector plate 4241.

[0049] The lifting hole 4222 of the limiting rail 4221 facilitates lifting and handling. The first limiting sleeve 421, the second limiting sleeve 422, and the mounting shaft 423 are used to limit and support the installation of multiple spiral silencers 424. The limiting rail 4221 at the bottom of the second limiting sleeve 422 is used to engage with the limiting block 412 of the mounting base 411, which can effectively improve the efficiency of disassembly and installation. The second limiting hole 4231 of the mounting shaft 423 is used to dock with the limiting drive shaft 3. The spiral silencers 424 use the spiral sound wave reflector 4241 on top to inject sound waves, causing the sound waves to collide and attenuate. The spiral silencer layer 4242 is used to reduce sound waves. The spiral silencer layer 4242 and the spiral sound wave reflector 4241 work together to effectively attenuate sound waves. The attenuation effect is stronger when the spiral silencer layer 4242 and the spiral sound wave reflector 4241 rotate, effectively reducing noise.

[0050] like Figure 1 and Figure 9 As shown:

[0051] The limiting and fixing cover 5 includes several positioning blocks 53 fixed to the outer wall of the exhaust pipe 1. Each positioning block 53 is provided with a positioning hole 531. The limiting and fixing cover 5 also includes a limiting mounting bracket 51 that snaps onto the top of the exhaust pipe 1. The limiting mounting bracket 51 is provided with a limiting sleeve hole at its axial position. The limiting mounting bracket 51 is also provided with several exhaust holes. The outer side of the limiting mounting bracket 51 is provided with a synchronous snap-fit ​​mechanism 52. The snap-fit ​​end of the synchronous snap-fit ​​mechanism 52 corresponds one-to-one with the positioning hole 531 of the positioning block 53.

[0052] The limiting mounting bracket 51 of the limiting fixing cover 5 is positioned and engaged with the positioning block 53 through the synchronous snap-fit ​​mechanism 52, so that the limiting mounting bracket 51 is installed at the outlet position of the exhaust pipe 1. At the same time, the limiting sleeve hole on the limiting mounting bracket 51 is used to fit on the top of the limiting drive shaft 3, which can effectively ensure the stability of the rotation of the limiting drive shaft 3. The exhaust hole on the limiting mounting bracket 51 facilitates the airflow from inside the exhaust pipe 1.

[0053] like Figure 9 and Figure 10 As shown:

[0054] The synchronous locking mechanism 52 includes a pusher 521 installed on the outside of the limiting mounting bracket 51. Several positioning posts 522 are also installed on the limiting mounting bracket 51. The positioning posts 522 are coaxially arranged with the positioning holes 531 of the positioning blocks 53. A first spring 523 is provided between the positioning posts 522 and the limiting mounting bracket 51. A positioning plug 5221 is provided at one end of the positioning post 522, and a pressing block 5222 is provided at the end of the positioning post 522 away from the positioning plug 5221.

[0055] When the limiting mounting bracket 51 of the limiting fixing cover 5 needs to be installed on the top of the exhaust pipe 1, the operator pushes multiple pressing blocks 5222 to move synchronously through the same part of the pusher 521. When the pressing block 5222 is pushed, it will drive the positioning column 522 to retract synchronously. When the positioning column 522 retracts, the first spring 523 will be squeezed. After the operator places the limiting mounting bracket 51 on the top of the exhaust pipe 1 and keeps the positioning column 522 in a docking state with the positioning hole 531 of the positioning block 53, the operator restores the position of the same part of the pusher 521. The first spring 523 then pushes the positioning column 522 to reset. The positioning plug 5221 of the positioning column 522 is inserted into the positioning hole 531 of the positioning block 53 for positioning.

[0056] like Figures 9 to 11 As shown:

[0057] The push frame 521 includes a rotating bracket 5211 rotatably mounted on the limiting mounting bracket 51, and an arc-shaped push frame 5212 is provided on the outside of the rotating bracket 5211.

[0058] The rotating bracket 5211 is used to rotate at the upper limit of the limiting mounting bracket 51. When it is necessary to push the positioning column 522 to move synchronously, the operator rotates the rotating bracket 5211. The rotating bracket 5211 abuts against the pressing block 5222 of the positioning column 522 through the external arc-shaped pushing bracket 5212, and applies pressure to the pressing block 5222 of the positioning column 522 to make the positioning column 522 contract and adjust its movement. This effectively adjusts the position of the positioning column 522 synchronously and improves the convenience of installation.

[0059] like Figure 1 and Figure 8 As shown:

[0060] The adaptive shielding mechanism 6 includes a limiting mounting ring 61 mounted on a limiting mounting bracket 51. Several rotating shielding plates 62 are mounted on the limiting mounting ring 61. Each rotating shielding plate 62 corresponds to a vent hole on the limiting mounting bracket 51. The rotating shielding plate 62 is provided with a limiting groove. The adaptive shielding mechanism 6 also includes a positioning mounting post 63 mounted at the axial position of the limiting mounting bracket 51. A pressing frame 64 is mounted on the positioning mounting post 63. Several pressing strips are provided on the pressing frame 64. The pressing strips abut against the limiting grooves of the rotating shielding plate 62. A second spring 65 is provided between the pressing frame 64 and the positioning mounting post 63.

[0061] The adaptive shielding mechanism 6 is installed on the limiting and fixing cover 5. When the exhaust pipe 1 is venting, the airflow passes through the limiting and fixing cover 5 and comes into contact with the rotating shielding plate 62. The rotating shielding plate 62 is affected by the pressure of the airflow and will move upward to allow the airflow to be discharged. When the rotating shielding plate moves upward, it will push the pressing frame 64 to move synchronously. When the pressing frame 64 moves, it will squeeze the second spring 65. When the exhaust pipe 1 stops venting, the second spring 65 will push the pressing frame downward to reset. When the pressing frame 64 resets downward, it will cause the rotating shielding plate 62 to reset synchronously to shield the exhaust port. The adaptive shielding of the exhaust port by the rotating shielding plate 62 can effectively prevent rainwater or foreign objects from falling into the exhaust pipe 1 and causing blockage inside the exhaust pipe 1.

[0062] like Figure 12 As shown:

[0063] The rotating silencing device also includes a gripper 7 for hoisting and replacing the splicing silencing mechanism 4. The gripper 7 also includes a three-jaw chuck 71. A third limiting hole 711 is provided at the axial center of the three-jaw chuck 71. The third limiting hole 711 matches the shape of the limiting drive shaft 3. Several clamping blocks 72 are installed on the gripping end of the three-jaw chuck 71. A camera 73 is provided on the outer side of the three-jaw chuck 71.

[0064] If excessive noise occurs, it indicates that the splicing muffler mechanism 4 needs to be replaced or repaired. Workers can disassemble the rotating muffler device sequentially using hoisting equipment. When disassembling the splicing muffler mechanism 4, workers install a three-jaw chuck 71 on the hoisting end of the hoisting equipment. The hoisting equipment places the three-jaw chuck 71 onto the limit drive shaft 3. The three-jaw chuck 71 can slide up and down on the limit drive shaft 3 through the third limit hole 711. Workers can observe the position of the three-jaw chuck 71 inside the exhaust pipe 1 through the camera 73. When the three-jaw chuck 71 descends to the position of the splicing muffler mechanism 4, the clamping end of the three-jaw chuck 71 is controlled to retract synchronously. When the three-jaw chuck 71 retracts, it will engage the clamping block 72 into the hoisting hole 4222 of the splicing muffler mechanism 4, clamping and fixing the splicing muffler mechanism 4. The hoisting equipment then rises again, causing the splicing muffler mechanism 4 to rise synchronously for disassembly, effectively improving the ease of disassembly.

[0065] Specific working principle:

[0066] When assembling the rotary muffler, the workers first install the rotary drive seat 2 and the limiting drive shaft 3 inside the exhaust pipe 1. Then, using hoisting equipment, they sequentially install multiple splicing muffler mechanisms 4 onto the limiting drive shaft 3. The limiting drive shaft 3 connects and stacks these multiple splicing muffler mechanisms 4 in series, forming a muffler channel. Assembly markings on the top of the limiting drive shaft 3 facilitate the workers' sequential assembly of the splicing muffler mechanisms 4, improving assembly and disassembly. After the splicing muffler mechanisms 4 are assembled, the workers install the limiting fixing cover 5 at the exhaust outlet of the exhaust pipe 1. The limiting fixing cover 5 also limits the top of the limiting drive shaft 3, ensuring its rotational stability. The adaptive shielding mechanism 6 adaptively shields the exhaust outlet, effectively preventing rainwater or foreign objects from falling into the exhaust pipe 1 and causing blockage. The noise detector is used to detect exhaust noise. Whether it meets the standards or not, after the rotary muffler is installed, when the ship starts, the exhaust pipe 1 will generate airflow and exhaust sound. When the airflow and exhaust sound pass through the rotary drive seat 2, the rotary drive seat 2 will rotate due to the airflow. When the rotary drive seat 2 rotates, it will drive the limit drive shaft 3 to rotate synchronously. When the limit drive shaft 3 rotates, it will drive the splicing muffler mechanism 4 to rotate synchronously. When the airflow and exhaust sound enter the rotating splicing muffler mechanism 4, the splicing muffler mechanism 4 will guide the gas to flow out smoothly. The sound waves in the exhaust sound will be attenuated and eliminated in the rotating splicing muffler mechanism 4. The rotating splicing muffler mechanism 4 can improve the sound wave attenuation effect. The noise detector can effectively detect whether the exhaust sound meets the standard. If the noise is too loud, it means that the splicing muffler mechanism 4 needs to be replaced or repaired. The staff can use the hoisting equipment to disassemble the rotary muffler and replace the splicing muffler mechanism 4 to restore the muffler effect. It is effective and convenient for maintenance and replacement.

[0067] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A muffler for an exhaust pipe, comprising a rotary muffler installed inside the exhaust pipe (1), characterized in that, The rotary muffler includes a rotary drive seat (2) installed inside the exhaust pipe (1), a limit drive shaft (3) installed on the rotary drive seat (2), several limit mounting slots (31) are provided on the outside of the limit drive shaft (3) and are evenly distributed at equal intervals, an assembly mark is provided on the top of the limit drive shaft (3), several interlocking muffler mechanisms (4) are installed on the limit drive shaft (3), a limit fixing cover (5) is provided on the top of the limit drive shaft (3), the limit fixing cover (5) is positioned and connected to the top of the drive shaft, an adaptive shielding mechanism (6) is installed at the bottom of the limit fixing cover (5), and a noise detector is installed on the adaptive shielding mechanism (6); The rotary drive seat (2) includes a mounting bracket (21) installed inside the exhaust pipe (1). A number of first balls (211) are distributed on the top of the mounting bracket (21). A guide bucket (22) is installed at the bottom of the mounting bracket (21). An airflow fan (23) is installed at the axial position of the guide bucket (22). The limiting fixing cover (5) includes a limiting mounting bracket (51) that is snapped onto the top of the exhaust pipe (1), and the limiting mounting bracket (51) has several exhaust holes distributed on it; The adaptive shielding mechanism (6) includes a limiting mounting ring (61) mounted on a limiting mounting bracket (51), and several rotating shielding plates (62) mounted on the limiting mounting ring (61). The rotating shielding plates (62) correspond one-to-one with the exhaust holes on the limiting mounting bracket (51). The rotating shielding plates (62) are provided with limiting grooves. The adaptive shielding mechanism (6) also includes a positioning mounting post (63) mounted on the axial position of the limiting mounting bracket (51). A pressing frame (64) is mounted on the positioning mounting post (63). Several mounting pressing strips are provided on the pressing frame (64). The pressing frame (64) abuts against the limiting groove of the rotating shielding plate (62). A second spring (65) is provided between the pressing frame (64) and the positioning mounting post (63).

2. A muffler for an exhaust pipe according to claim 1, characterized in that, The splicing silencing mechanism (4) includes a stable splicing base (41) installed on the limit drive shaft (3), a spiral silencing sleeve (42) is installed on the stable splicing base (41), and the stable splicing base (41) and the spiral silencing sleeve (42) are spliced ​​together.

3. A muffler for an exhaust pipe according to claim 2, characterized in that, The stable splicing base (41) includes a mounting base (411). The mounting base (411) has a first limiting hole (414) at its axial position. The first limiting hole (414) matches the shape of the limiting drive shaft (3). The side of the mounting base (411) is covered with second balls (413). The top of the mounting base (411) is provided with several limiting blocks (412). The limiting blocks (412) are evenly distributed at equal intervals with the first limiting hole (414) as the axis.

4. A muffler for an exhaust pipe according to claim 3, characterized in that, The spiral silencer sleeve (42) includes a first limiting sleeve (421), inside which a second limiting sleeve (422) and a mounting shaft (423) are also provided. The second limiting sleeve (422) and the mounting shaft (423) are both coaxially arranged with the first limiting sleeve (421). The axis of the mounting shaft (423) is provided with a second limiting hole (4231). The second limiting hole (4231) has the same structure as the first limiting hole (414). The bottom of the second limiting sleeve is provided with several limiting rails (4221). 4221) is matched with the limiting block (412) of the mounting base (411). The inner wall of the second limiting sleeve (422) is also provided with several lifting holes (4222). The first limiting sleeve (421), the second limiting sleeve (422) and the mounting shaft (423) are all covered with spiral silencing plates (424). The spiral silencing plates (424) are sandwich structures. The middle of the spiral silencing plates (424) is a spiral silencing layer (4242). The outer wall of the spiral silencing layer (4242) is adjusted with a spiral sound wave reflector plate (4241).

5. A muffler for an exhaust pipe according to claim 1, characterized in that, The limiting and fixing cover (5) includes several positioning blocks (53) fixed on the outer wall of the exhaust pipe (1). Each positioning block (53) is provided with a positioning hole (531). The limiting mounting bracket (51) is provided with a limiting sleeve hole at the axial position. The outer side of the limiting mounting bracket (51) is provided with a synchronous snap-fit ​​mechanism (52). The snap-fit ​​end of the synchronous snap-fit ​​mechanism (52) corresponds one-to-one with the positioning hole (531) of the positioning block (53).

6. A muffler for an exhaust pipe (1) according to claim 5, characterized in that, The synchronous snap-fit ​​mechanism (52) includes a push-fit frame (521) installed on the outside of the limit mounting frame (51). Several positioning posts (522) are also installed on the limit mounting frame (51). The positioning posts (522) are coaxially arranged with the positioning holes (531) of the positioning blocks (53). A first spring (523) is provided between the positioning posts (522) and the limit mounting frame (51). A positioning plug (5221) is provided at one end of the positioning post (522), and a pressing block (5222) is provided at the end of the positioning post (522) away from the positioning plug (5221).

7. A muffler for an exhaust pipe (1) according to claim 6, characterized in that, The push frame (521) includes a rotating bracket (5211) rotatably mounted on the limit mounting bracket (51), and an arc-shaped push frame (5212) is provided on the outside of the rotating bracket (5211).

8. A muffler for an exhaust pipe (1) according to claim 1, characterized in that, The rotating silencing device also includes a gripper (7) for hoisting and replacing the splicing silencing mechanism (4). The gripper (7) also includes a three-jaw chuck (71). A third limiting hole (711) is provided at the axial position on the three-jaw chuck (71). The third limiting hole (711) matches the shape of the limiting drive shaft (3). Several clamping blocks (72) are installed on the gripping end of the three-jaw chuck (71). A camera (73) is provided on the outside of the three-jaw chuck (71).

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