A long-life muffler

Abstract

The present invention discloses a long-life silencer, comprising a silencer tube and an adjusting mechanism. A plurality of silencer cottons are arranged in the silencer tube, and a silencer channel is enclosed between the plurality of silencer cottons. The adjusting mechanism is arranged in the silencer tube, and the adjusting mechanism is used to drive the silencer cottons to rotate in the silencer tube. The adjusting mechanism provided by the present invention can move other areas on the silencer cotton into the silencer channel through the adjusting mechanism when the area of ​​the silencer cotton located in the silencer channel is corroded during long-term use, and replace the corroded area on the silencer cotton located in the silencer channel, so as to avoid the corroded area being in the silencer channel all the time, thereby indirectly improving the silencer effect of the silencer cotton, and also improving the service life of the silencer cotton and the silencer.

Description

Technical Field

[0001] The invention relates to the technical field of mufflers, in particular to a long-life muffler. Background Art

[0002] The working principle of muffler is to reduce the propagation of noise by absorbing, reflecting or isolating the energy of noise. They usually use sound-absorbing materials to absorb sound wave energy, such as foam materials, fiberboards, glass fibers, ceramic fibers, etc. Sound-absorbing materials can convert the mechanical energy of sound into heat energy, thereby reducing the propagation of sound.

[0003] For example, a patent with publication number CN108730237B and publication date May 19, 2020 discloses a fan silencer with measurable flow rate, which relates to the technical field related to fan silencer equipment, including that the fan silencer includes a shell and two pressure measuring connecting pipes, the shell forms a receiving cavity, an air duct is arranged in the receiving cavity, and the size of the cross-section of the air duct perpendicular to the length direction of the shell is not completely the same; the fan silencer also includes a sound-absorbing material, and the sound-absorbing material is filled between the air duct and the shell; at least one first pressure measuring point and at least one second pressure measuring point are arranged on the air duct, and the first pressure measuring point and the second pressure measuring point are arranged at intervals; the two pressure measuring connecting pipes are respectively arranged on the shell, and are respectively connected to the first pressure measuring point and The second pressure measuring points are connected, so that the pressure at two points of the air duct is detected, and the flow rate of the fan is obtained according to the detected pressure; the fan muffler also includes a central tube, a plurality of silencer tubes and two flow guide structures, the two ends of the silencer tube are respectively connected to the two flow guide structures, and the two ends of the central tube are also respectively connected to the two flow guide structures, thereby forming the air duct; a throat is formed in the middle of the central tube, and the first pressure measuring point is arranged at the inlet section of the central tube, and the second pressure measuring point is arranged on the wall surface of the throat; wherein the inner diameter of the throat is 1 / 2 to 2 / 3 times the inner diameter of the inlet section of the central tube; the plurality of silencer tubes are evenly arranged around the central tube, and the spacing between the plurality of silencer tubes and the central tube is equal.

[0004] Most of the existing fan silencers are installed at the air inlet or outlet of the fan. When the fan is arranged in an industrial processing or experimental site such as an industrial chemical plant, there will be certain corrosive gases in the industrial exhaust air carried by the fan. When the fan is used for a long time in this environment, the corrosive gas will corrode the surface of the silencer cotton in the silencer, that is, the side of the silencer cotton located in the silencer channel. The corrosion will reduce the effective area of ​​the silencer cotton surface, weakening its ability to contact sound waves. In addition, if the surface of the silencer cotton is damaged, the sound waves may be reflected on the surface, reducing the chance of sound waves entering the inside of the silencer cotton, thereby affecting the sound absorption effect. Summary of the invention

[0005] The object of the present invention is to provide a long-life muffler to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a long-life silencer, including a silencer tube and an adjustment mechanism, a plurality of silencer cottons are arranged in the silencer tube, a silencer channel is enclosed between the plurality of silencer cottons, the adjustment mechanism is arranged in the silencer tube, and the adjustment mechanism is used to drive the silencer cottons to rotate in the silencer tube.

[0007] Preferably, the sound-absorbing cotton has a hexagonal prism structure and is provided in six groups, and the six groups of sound-absorbing cotton are arranged in a ring shape around the central axis of the silencer cylinder.

[0008] Preferably, the adjustment mechanism includes a driving component and a passive component installed in the silencer, and the driving component drives the silencer cotton to move radially along the silencer through the passive component to cause the silencer cotton to rotate.

[0009] Preferably, the driving assembly includes a driving motor, a turntable and a passive disk, the driving motor is fixedly installed inside the silencer, the turntable and the passive disk are rotatably installed in the silencer, the silencer cotton is located between the turntable and the passive disk, a connecting shaft is installed on the silencer cotton, the silencer cotton is sleeved on the connecting shaft, a tooth groove is provided on the outer wall of the turntable, a first gear is installed on the output shaft of the driving motor, the first gear is meshed with the tooth groove, a second gear is installed on the end of the connecting shaft extending out of the guide groove, a gear ring meshed with the second gear is also installed in the silencer, the passive assembly includes a guide groove provided on the turntable and a slide groove on the passive disk, both ends of the connecting shaft pass through the turntable and the passive disk through the guide groove and the slide groove, and form a sliding guide cooperation with the guide groove and the slide groove.

[0010] Preferably, a gap is provided between the connecting shaft and the guide groove and the sliding groove at one end close to the silencer channel.

[0011] Preferably, a shielding member is provided in the silencer tube, and the shielding member is located at each corner of the silencer channel.

[0012] Preferably, the shielding member includes a baffle, and both ends of the baffle are fixedly connected to the inner wall of the silencer.

[0013] Preferably, a flexible pad is installed on one side of the baffle plate close to the sound-absorbing cotton.

[0014] Preferably, a sealing plate is installed on a side of the baffle plate close to the sound-absorbing cotton, one end of the sealing plate is rotatably connected to the baffle plate through a hinge shaft, and a torsion spring is installed at the connection between the sealing plate and the baffle plate.

[0015] Preferably, a guiding slope is provided at one end of the sealing plate away from the hinge shaft.

[0016] The beneficial effect of the present invention is that in the above technical scheme, the adjustment mechanism provided by the present invention, when the area of ​​the silencer cotton located in the silencer channel is corroded during long-term use, the adjustment mechanism moves other areas on the silencer cotton into the silencer channel, and replaces the corroded area on the silencer cotton located in the silencer channel, thereby avoiding the corroded area from being in the silencer channel all the time, indirectly improving the silencer effect of the silencer cotton, and also increasing the service life of the silencer cotton and the silencer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 An internal cross-sectional view of a muffler provided for a long-life muffler of the present invention;

[0019] Figure 2 Provided for a long-life muffler of the present invention Figure 1 A in the enlarged view;

[0020] Figure 3 A schematic diagram of a silencer cotton assembly provided for a long-life silencer of the present invention;

[0021] Figure 4 A schematic diagram of the structure of a turntable provided for a long-life muffler of the present invention;

[0022] Figure 5 A schematic diagram of the passive disk structure provided for a long-life muffler of the present invention;

[0023] Figure 6 Provided for a long-life muffler of the present invention Figure 4 Enlarged view of point B in .

[0024] Description of reference numerals:

[0025] 1. Silencer; 2. Adjustment mechanism; 21. Drive assembly; 211. Drive motor; 212. First gear; 213. Turntable; 214. Passive disk; 22. Passive assembly; 221. Guide groove; 222. Slide groove; 223. Second gear; 224. Gear ring; 225. Rectangular slider; 3. Silencer cotton; 31. Connecting shaft; 4. Silencer channel; 5. Shielding member; 51. Baffle; 52. Sealing plate; 53. Accommodating groove. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] like Figure 1-Figure 6 As shown, an embodiment of the present invention provides a long-life silencer, including a silencer tube 1 and an adjusting mechanism 2. A plurality of silencer cottons 3 are arranged in the silencer tube 1, and a silencer channel 4 is enclosed between the plurality of silencer cottons 3. The adjusting mechanism 2 is arranged in the silencer tube 1, and the adjusting mechanism 2 is used to drive the silencer cottons 3 to rotate in the silencer tube 1.

[0029] Specifically, the silencer 1 has a cylindrical structure, and one end can be detachably mounted on the air outlet or air inlet of the fan. The detachable mounting method can be a bolt, a buckle, etc. The adjusting mechanism 2 is arranged in the silencer 1, and the adjusting mechanism 2 is used to drive the silencer cotton 3 to rotate in the silencer 1. In this embodiment, the adjusting mechanism 2 can be a rotating driving mechanism such as a motor and a rotary cylinder. When the adjusting mechanism 2 is a motor, the silencer cotton 3 is connected to the output shaft of the motor, and the motor drives the silencer cotton 3 to rotate in the silencer 1. When the silencer cotton 3 is a cylindrical structure, a silencer channel 4 is enclosed between several cylindrical silencer cottons 3. Each group of silencer cottons 3 can be connected by a chain or a belt drive. When the silencer cotton 3 needs to be adjusted, the motor drives multiple groups The silencer cotton 3 rotates synchronously in the silencer barrel 1. The area of ​​the silencer cotton 3 located in the silencer channel 4 is adjusted by rotation and is separated from the silencer channel 4. The area is the boundary of the silencer channel. Therefore, when the fan discharges air into the silencer barrel 1, the air flows in the silencer channel 4. When the area of ​​the silencer cotton 3 located in the silencer channel 4 is corroded by the corrosive gas in the air during long-term use, the other areas of the silencer cotton 3 are rotated into the silencer channel 4 through the adjustment mechanism 2, and the corroded area of ​​the silencer cotton 3 located in the silencer channel 4 is replaced to avoid the corroded area from being in the silencer channel 4 all the time, thereby indirectly improving the silencer effect of the silencer cotton 3 and also improving the service life of the silencer cotton 3 and the silencer.

[0030] Preferably, the sound-absorbing cotton 3 is in a hexagonal prism structure, and is provided in six groups, and the six groups of sound-absorbing cotton 3 are arranged in a ring shape around the central axis of the silencer 1 .

[0031] Specifically, in the above embodiment, the sound-absorbing cotton 3 is in a cylindrical structure. Since the contact area between the sound-absorbing cotton 3 of the cylindrical structure is small, the sealing effect between adjacent sound-absorbing cotton 3 is poor. Therefore, in the present embodiment, the sound-absorbing cotton 3 is in a hexagonal prism structure, and six groups are provided. The six groups of sound-absorbing cotton 3 are arranged in a ring shape with the central axis of the silencer 1. Because the six groups of sound-absorbing cotton 3 are all in a hexagonal prism structure, the side surface of the sound-absorbing cotton 3 close to the sound-absorbing channel 4 is the A surface, and the A surface is the boundary of the sound-absorbing channel. The six groups of sound-absorbing cotton 3 are distributed in a circle with the central axis of the silencer 1, so the enclosed sound-absorbing channel 4 is also in a hexagonal prism shape. The side surfaces of adjacent sound-absorbing cotton 3 are in contact with each other, and the surface contact makes the sealing effect between adjacent sound-absorbing cotton 3 better, and the adjustment Mechanism 2 includes a linear drive mechanism and a rotation drive mechanism, that is, a cylinder and a motor. In actual use, the cylinder drives the silencer cotton 3 to move to the side away from the silencer channel 4, that is, to move along the radial direction of the silencer tube 1. The movement is used to open the gap between adjacent silencer cottons 3 to provide space support for the rotation of the silencer cotton 3. After the movement, the motor drives the silencer cotton 3 to rotate, and the rotation angle is sixty degrees. The other side of the silencer cotton 3 with a hexagonal prism structure is rotated into the silencer channel 4, that is, the side adjacent to the corroded area, and the corroded side is replaced with the adjacent side to avoid the corroded side from being in the silencer channel 4 for a long time and affecting the silencer effect. Finally, the cylinder drives the silencer cotton 3 to reset.

[0032] In an optional embodiment, the adjustment mechanism 2 includes a driving component 21 and a passive component 22 installed in the silencer 1 , and the driving component 21 drives the silencer cotton 3 to move radially along the silencer 1 and causes the silencer cotton 3 to rotate through the passive component 22 .

[0033] Specifically, the adjustment mechanism 2 includes a driving component 21 and a passive component 22 installed in the silencer 1. The driving component 21 can be a linear driving mechanism such as a cylinder and an electric telescopic rod. The driving mechanism drives the silencer cotton 3 to move radially along the silencer 1. The passive component 22 can be a gear and a rack arranged on the moving path of the silencer cotton 3. The gear is installed on the end of the silencer cotton 3. When the driving mechanism drives the silencer cotton 3 to move, the gear contacts the rack, driving the silencer cotton 3 to rotate. When resetting, the gear can be disengaged from the rack, thereby realizing the rotation of the silencer cotton 3 in the process of opening the spacing.

[0034] In an optional embodiment, preferably, the driving assembly 21 includes a driving motor 211, a rotating disk 213 and a passive disk 214, the driving motor 211 is fixedly installed inside the silencer 1, the rotating disk 213 and the passive disk 214 are rotatably installed on opposite sides of the silencer 1, the silencer cotton 3 is located between the rotating disk 213 and the passive disk 214, the silencer cotton 3 is installed with a connecting shaft 31, the silencer cotton 3 is sleeved on the connecting shaft 31, the outer wall of the rotating disk 213 is provided with a tooth groove, the output shaft of the driving motor 211 is installed with a first gear 212, the first The gear 212 is meshed with the tooth groove, a guide groove 221 is provided on the turntable 213, a second gear 223 is installed on one end of the connecting shaft 31 extending out of the guide groove 221, and a gear ring 224 meshing with the second gear 223 is also installed in the silencer 1. The passive component 22 includes a guide groove 221 opened on the turntable 213 and a slide groove 222 on the passive disk 214. Both ends of the connecting shaft 31 pass through the turntable 213 and the passive disk 214 through the guide groove 221 and the slide groove 222, and form a sliding guide fit with the guide groove 221 and the slide groove 222.

[0035] Specifically, the driving motor 211 is fixedly installed inside the muffler 1, the rotating disk 213 and the passive disk 214 are rotatably installed in the muffler 1, and a friction member is installed at the connection between the passive disk 214 and the muffler 1. The friction member can be a rubber pad, a rubber ring, etc., which is used to increase the friction between the passive disk 214 and the inner wall of the muffler 1. A rectangular slider 225 is installed in the rotating disk 213 and the passive disk 214. The two ends of the connecting shaft 31 pass through the guide groove 221 and the slide groove 222 and penetrate the rectangular slider 225. The connecting shaft 3 A friction piece is also installed between 1 and the rectangular slider 225, and forms a sliding guide with the guide groove 221 and the slide groove 222, wherein the guide groove 221 is an inclined groove, and the groove direction of the slide groove 222 is consistent with the radial direction of the silencer 1, so that the directions of the guide groove 221 and the slide groove 222 are inconsistent. In actual use, the first state before the adjustment of the silencer cotton 3 and the second state after the adjustment are included, wherein when the first state is adjusted to the second state, the first stroke of horizontal movement and the second stroke of rotation are included, as follows:

[0036] The first state is the initial state: six groups of silencer cotton 3 are attached to each other and form a silencer channel 4 in the shape of a hexagonal prism, and the end of the guide groove 221 and the slide groove 222 close to the silencer channel 4 is the starting end, and the other end is the terminal end. Both ends of the connecting shaft 31 are located in the starting ends of the guide groove 221 and the slide groove 222, and the side of the silencer cotton 3 close to the silencer channel 4 is the A side, which is the boundary of the silencer channel 4;

[0037] Second state: the six groups of silencer cotton 3 are still combined into the silencer channel 4 in the shape of a hexagonal prism, and the side surface adjacent to the A surface is rotated into the silencer channel 4;

[0038] First stroke: the driving motor 211 drives the first gear 212 on the output shaft to rotate, the first gear 212 meshes with the tooth groove and drives the turntable 213 to rotate synchronously, the rotation of the turntable 213 drives the connecting shaft 31 and the rectangular slider 225 to slide on the guide groove 221, due to the inclined setting of the guide groove 221, one end of the connecting shaft 31 and the rectangular slider 225 will move from the starting end to the end end, because the passive disk 214 has a certain friction with the muffler 1, so the passive disk 214 will not rotate synchronously with the turntable 213 in this stroke. The other end of the connecting shaft 31 and another set of rectangular sliders 225 move from the starting end of the slide groove 222 to the end end. At this time, the silencer cotton 3 follows the connecting shaft 31 to move synchronously along the radial direction of the silencer tube 1, that is, to the side away from the silencer channel 4, until the two ends of the connecting shaft 31 move to the end ends of the guide groove 221 and the slide groove 222. At this time, the gap between the adjacent silencer cottons 3 has been opened, and the second gear 223 follows the connecting shaft 31 to move synchronously and contact the gear ring 224, and mesh with each other, and the first stroke ends;

[0039] Second stroke: the driving motor 211 continues to drive the turntable 213 to rotate through the first gear 212. Since the connecting shaft 31 has moved to the end of the guide groove 221 and the slide groove 222 and cannot move further, the connecting shaft 31 and the rectangular slider 225 are forced to rotate synchronously with the turntable 213 under the resistance of the groove wall of the guide groove 221 and the slide groove 222, and drive the passive disk 214 to overcome the friction with the inner wall of the silencer 1 and rotate synchronously with the turntable 213. At this time, the silencer cotton 3 revolves in the silencer 1, and because the second gear 223 is meshed with the gear ring 224 at this time, the second gear 223 rotates during the revolution, and drives the connecting shaft 31 and the silencer The cotton 3 rotates, and when the turntable 213 continues to revolve sixty degrees, the other side of the silencer cotton 3 faces the silencer channel 4, that is, the side adjacent to the A surface, and then the driving motor 211 drives the turntable 213 to rotate in the opposite direction through the first gear 212, and the rectangular slider 225 drives the connecting shaft 31 to move from the terminal end of the slide groove 222 and the guide groove 221 to the starting end until the rectangular slider 225 moves to the starting end, and the six groups of silencer cotton 3 are again attached to each other, and the second state is formed. According to the above steps, multiple adjustments can be made. Because the silencer cotton 3 is in the shape of a hexagonal prism, five second states can be adjusted after the first state, further improving the service life of the muffler;

[0040] It should be noted that, since a friction member, which may be a rubber ring, is installed between the connecting shaft 31 and the rectangular slider 225, in the first stroke, the rectangular slider 225 slides in the guide groove 221 and the slide groove 222. Affected by the friction force between the connecting shaft 31 and the rectangular slider 225, the connecting shaft 31 does not rotate. In the second stroke, affected by the second gear 223, the connecting shaft 31 is forced to overcome the friction force with the friction member and rotate in the rectangular slider 225.

[0041] Furthermore, a gap is provided between the connecting shaft 31 and the guide groove 221 and the sliding groove 222 at one end close to the muffler channel 4 .

[0042] Specifically, the end of the guide groove 221 and the slide groove 222 close to the silencer channel 4 is the starting end. In the first state, the initial positions of the connecting shaft 31 and the rectangular slider 225 are not located in the starting end, but are at a certain distance from the starting end. In the second stroke, the connecting shaft 31 and the rectangular slider 225 will both move to the starting end. Therefore, the moving stroke of the connecting shaft 31 and the rectangular slider 225 in the first stroke is smaller than the stroke of the connecting shaft 31 and the rectangular slider 225 in the second state. That is to say, in the second stroke, after the connecting shaft 31 and the rectangular slider 225 are reset to the initial position, they still need to continue to move in the guide groove 221 and the slide groove 222 until they move to the starting end. Therefore, the second stroke Compared with the first state, the extrusion force between the six groups of silencer cottons 3 is increased, and the adjacent silencer cottons 3 are more closely fitted. Because in the second state, since the side surface adjacent to the A surface faces the silencer channel 4, the A surface will contact the adjacent silencer cotton 3, and because the A surface has been corroded, concave holes or grooves appear on it, which will affect the sealing between the adjacent silencer cottons 3. Therefore, in order to improve the sealing between the A surface and the adjacent silencer cottons 3, after the silencer surface is rotated from the first state to the second state, the extrusion force between the silencer cottons 3 is increased in the above manner, thereby improving the sealing between the A surface and the adjacent silencer cottons 3 and avoiding the formation of gaps between the adjacent silencer cottons 3.

[0043] In another embodiment of the present invention, a shielding member 5 is provided in the silencer 1 , and the shielding member 5 is located at each corner of the silencer channel 4 .

[0044] Specifically, the shielding member 5 is located at each corner of the muffler channel 4. The shielding member 5 is a long strip plate. The shielding member 5 is attached to the two long sides of the A surface of the muffler cotton 3. Figure 6 In the middle A area, during actual use, the A area is shielded by the shielding member 5 to prevent the A area from being corroded and concave in the silencer channel 4, so that the surface of the A area can remain in a planar state. After the silencer cotton 3 is adjusted from the first state to the second state, the A surface will contact one side of the adjacent silencer cotton 3. Since the A area is shielded and not corroded, in the second state, the planar state maintained by the surface of the A area can fully contact the adjacent surface of the silencer cotton 3 and seal the gap between the A surface and the adjacent silencer cotton 3, thereby improving the sealing between the corroded A surface and the adjacent silencer cotton 3 while maintaining the silencer effect of the silencer cotton 3.

[0045] Furthermore, the shielding member 5 includes a baffle 51 , and two ends of the baffle 51 are fixedly connected to the inner wall of the silencer 1 .

[0046] Specifically, both ends of the baffle 51 are fixedly connected to the inner wall of the silencer 1. The baffle 51 is located at each corner of the silencer channel 4. The baffle 51 has a V-shaped structure and is located in the gap between two adjacent silencer cottons 3. In actual use, the baffle 51 can not only seal the gap between two adjacent silencer cottons 3 to prevent sound waves from directly entering the gap, but also shield and protect area A on the silencer cotton 3 to prevent corrosive gas from directly contacting area A and avoiding corrosion concave in area A.

[0047] Furthermore, a flexible pad is installed on one side of the baffle 51 close to the sound-absorbing cotton 3 .

[0048] Specifically, since the baffle 51 is a rigid plate-like body, there may be a problem of insufficient contact with the silencer cotton 3. Therefore, in the present embodiment, a flexible pad is installed on the side of the baffle 51 close to the silencer cotton 3. When the silencer cotton 3 is against the baffle 51, it will contact the flexible pad and squeeze the flexible pad and the silencer cotton 3 to produce a certain deformation, thereby increasing the contact area between the flexible pad and the silencer cotton 3, improving the sealing between the two, and preventing corrosive gas from directly entering the A area.

[0049] In another embodiment of the present invention, a sealing plate 52 is installed on one side of the baffle 51 close to the silencer cotton 3, one end of the sealing plate 52 is rotatably connected to the baffle 51 through a hinge shaft, and a torsion spring is installed at the connection between the sealing plate 52 and the baffle 51.

[0050] Specifically, the flexible pad is installed on the surface of the sealing plate 52, and the A area is located on the side of the sealing plate 52 away from the baffle 51. In the first state, the torsion spring is in a rolled-up state, and the silencer cotton 3 presses the sealing plate 52 on the baffle 51. At this time, the torsion spring also provides an upward elastic force for the sealing plate 52, so that the sealing plate 52 can fully contact the silencer cotton 3 in the A area. When the silencer cotton 3 is adjusted from the first state to the second state, the silencer cotton 3 moves along the radial direction of the silencer cylinder 1 in the first stroke, opens the gap between adjacent silencer cottons 3, and breaks away from the squeezing of the sealing plate 52. At this time, the torsion spring begins to reset, driving the sealing plate 52 to rotate 120 degrees, so that the sealing plate 5 2 is consistent with the inclination direction of the side surface adjacent to the A surface of the sound-absorbing cotton 3, and after rotation, the sealing plate 52 is located between the two groups of sound-absorbing cotton 3 in the first state, so after the sound-absorbing cotton 3 is adjusted to the second state, the two adjacent groups of sound-absorbing cotton 3 will be located on both sides of the sealing plate 52, and the sealing plate 52 is located in the gap between the adjacent sound-absorbing cotton 3. By utilizing the setting of the sealing plate 52, it is filled between the two groups of sound-absorbing cotton 3, further increasing the extrusion force between the adjacent sound-absorbing cotton 3, and the cooperation of the sealing plate 52 and the baffle plate 51 is equivalent to blocking the opening of the gap between the adjacent sound-absorbing cotton 3 close to the side of the sound-absorbing channel 4, which can further prevent the sound waves from directly passing through the gap.

[0051] Furthermore, a guiding slope is provided at one end of the sealing plate 52 away from the hinge axis.

[0052] Specifically, when the sealing plate 52 rotates and the silencer cotton 3 is in the second stroke, the silencer cotton 3 contacts the guide slope and moves along the guide slope to the sealing plate 52. Under the setting of the guide slope, the silencer cotton 3 can be prevented from getting stuck after contacting the sealing plate 52 during the second stroke. When the silencer cotton 3 is adjusted to the second state, the sealing plate 52 is located in the gap between adjacent silencer cottons 3. At this time, the sealing plate 52 is like a wedge, which is wedged into the gap between two groups of adjacent silencer cottons 3 to fill the gap between the two groups of adjacent silencer cottons 3.

[0053] Furthermore, a flexible pad is also installed on a side of the sealing plate 52 close to the baffle 51 .

[0054] Specifically, since the sealing plate 52 is a hard plate-like body, there may be a problem of not being able to fully contact the silencer cotton 3. Therefore, in this embodiment, when the sealing plate 52 rotates between the two groups of silencer cotton 3, the silencer cotton 3 will contact the flexible pad and squeeze the flexible pad and the silencer cotton 3 to cause a certain deformation, thereby increasing the contact area between the flexible pad and the silencer cotton 3 and improving the sealing between the two.

[0055] Furthermore, a receiving groove 53 is formed on the surface of the baffle plate 51 , and the sealing plate 52 is received in the receiving groove 53 .

[0056] Specifically, in the first state, the sealing plate 52 is accommodated in the receiving groove 53. When the sound-absorbing cotton 3 is adjusted from the first state to the second state, the sealing plate 52 rotates and disengages from the receiving groove 53. At this time, the opening of the receiving groove 53 is opened because the movement stroke of the connecting shaft 31 and the rectangular slider 225 in the first stroke is smaller than the movement stroke of the connecting shaft 31 and the rectangular slider 225 in the second state. That is to say, in the second stroke, after the connecting shaft 31 and the rectangular slider 225 are reset to the initial position, they need to continue to move in the guide groove 221 and the slide groove 222. The connecting shaft 31 and the rectangular slider 225 move to the initial position, and the area A on the silencer cotton 3 moves to the opening of the receiving groove 53. As the connecting shaft 31 and the rectangular slider 225 continue to move, the silencer cotton 3 also continues to move along the radial direction of the silencer cylinder 1, and the area A is squeezed into the receiving groove 53. The area A is accommodated by the receiving groove 53, and the area A of the silencer cotton 3 is further protected to prevent the area A from being corroded and concave, and the silencer cotton 3 in the area A is directly exposed to the silencer channel 4 and corroded.

[0057] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A long-life muffler, characterized in that: The invention comprises a silencer (1) and an adjustment mechanism (2). A plurality of silencer cottons (3) are arranged in the silencer (1). The plurality of silencer cottons (3) form a silencer channel (4). The adjustment mechanism (2) is arranged in the silencer (1). The adjustment mechanism (2) is used to drive the silencer cottons (3) to rotate in the silencer (1). The silencer cottons (3) are in a hexagonal column structure and are provided with six groups. The six groups of silencer cottons (3) are arranged in a ring shape around the central axis of the silencer (1). The adjustment mechanism (2) comprises a driving component (21) and a passive component (22) installed in the silencer (1). The driving component (21) drives the silencer cottons (3) to rotate along the central axis of the silencer (1). The silencer (1) moves radially through the passive component (22) to cause the silencer cotton (3) to rotate. The driving component (21) comprises a driving motor (211), a rotating disk (213) and a passive disk (214). The driving motor (211) is fixedly installed inside the silencer (1). The rotating disk (213) and the passive disk (214) are rotatably installed inside the silencer (1). The silencer cotton (3) is located between the rotating disk (213) and the passive disk (214). A connecting shaft (31) is installed on the silencer cotton (3). The silencer cotton (3) is sleeved on the connecting shaft (31). A tooth groove is provided on the outer wall of the rotating disk (213). The driving motor A first gear (212) is mounted on the output shaft of the rotating disk (211), and the first gear (212) meshes with the tooth groove. A second gear (223) is mounted on one end of the connecting shaft (31) extending out of the guide groove (221). A gear ring (224) meshing with the second gear (223) is also mounted in the silencer (1). The passive component (22) includes a guide groove (221) formed on the rotating disk (213) and a slide groove (222) formed on the passive disk (214). Both ends of the connecting shaft (31) penetrate the rotating disk (213) and the passive disk (214) through the guide groove (221) and the slide groove (222), and are connected to the guide groove (221). The groove (221) and the slide groove (222) form a sliding guide. A shielding member (5) is provided in the silencer (1). The shielding member (5) is located at each corner of the silencer channel (4). The shielding member (5) comprises a baffle (51). Both ends of the baffle (51) are fixedly connected to the inner wall of the silencer (1). A flexible pad is installed on one side of the baffle (51) close to the silencer cotton (3). A sealing plate (52) is installed on one side of the baffle (51) close to the silencer cotton (3). One end of the sealing plate (52) is rotatably connected to the baffle (51) via a hinge shaft, and a torsion spring is installed at the connection between the sealing plate (52) and the baffle (51).

2. A long-life muffler according to claim 1, characterized in that: A gap is provided between the connecting shaft (31) and the guide groove (221) and the sliding groove (222) at one end close to the muffler channel (4).

3. A long-life muffler according to claim 1, characterized in that: A guiding inclined surface is provided at one end of the sealing plate (52) away from the hinge shaft.

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