阅读说明：本技术 一种低噪消音器 (Low-noise silencer ) 是由 谢其志 谢庆杰 曹道义 武猛 马启东 张同千 于 2021-08-05 设计创作，主要内容包括：本发明公开了一种低噪消音器,包括圆形的第一消音管和圆形的第二消音管,所述第一消音管直径小于所述第二消音管直径,且所述第一消音管和所述第二消音管之间通过安装密封机构进行连接,所述第一消音管和所述第二消音管内壁均设置有第一吸声棉,所述第一消音管上安装有进管,所述第二消音管上安装有出管。有益效果：第三消音腔内部的吸音板与第二小音腔内部的吸音板工作原理是一样的,然后再进入第四消音腔内,通过设置的第二降噪机构进行再次降噪,因此达到很好的吸音效果,最终低噪音的频率段噪声进入第二消音管内,第二消音管内的第一吸声棉达到最后的消音,使其噪音降到极低。(The invention discloses a low-noise silencer, which comprises a circular first silencing pipe and a circular second silencing pipe, wherein the diameter of the first silencing pipe is smaller than that of the second silencing pipe, the first silencing pipe and the second silencing pipe are connected through a mounting sealing mechanism, first sound absorption cotton is arranged on the inner walls of the first silencing pipe and the second silencing pipe, an inlet pipe is arranged on the first silencing pipe, and an outlet pipe is arranged on the second silencing pipe. Has the advantages that: the abatvoix in the third amortization intracavity portion is the same with the abatvoix theory of the second xiao gong intracavity portion, then gets into the fourth amortization intracavity again, falls the mechanism of making an uproar through the second that sets up and falls once more and fall and make an uproar, consequently reaches fine sound absorbing effect, and the frequency section noise of final low noise gets into in the second amortization pipe, and the cotton of first sound absorption in the second amortization pipe reaches final amortization, makes its noise fall extremely low.)

1. The low-noise silencer is characterized by comprising a first circular silencing pipe (1) and a second circular silencing pipe (2), wherein the diameter of the first silencing pipe (1) is smaller than that of the second silencing pipe (2), and the first silencing pipe (1) is connected with the second silencing pipe (2) through a sealing mechanism.

2. A low noise silencer according to claim 1, wherein the inner walls of the first silencing tube (1) and the second silencing tube (2) are provided with first sound-absorbing cotton (3), the first silencing tube (1) is provided with an inlet tube (4), the second silencing tube (2) is provided with an outlet tube (5), the first silencing tube (1) is internally provided with a first silencing plate (6), a second silencing plate (7) and a third silencing plate (8) which are provided with sound holes, the first silencing tube (1) is internally divided into a first silencing cavity (9), a second silencing cavity (10), a third silencing cavity (11) and a fourth silencing cavity (12) through the first silencing plate (6), the second silencing plate (7) and the third silencing plate (8), and the inner walls of the second silencing cavity (10) and the third silencing cavity (11) are provided with sound-absorbing plates (13), a silencing bowl (14) is mounted on the side wall of the sound absorption plate (13) on the second silencing cavity (10), a first noise reduction mechanism is arranged in the first silencing cavity (9), a second noise reduction mechanism is arranged in the fourth silencing cavity (12), a dust removal mechanism is arranged on the inlet pipe (4), the dust removal mechanism comprises a filter plate (15) mounted in the inlet pipe (4) through a dismounting mechanism, a mounting frame (16) is fixedly arranged in the inlet pipe (4), a shaft sleeve (17) is arranged in the middle of the mounting frame (16) in an embedded mode, a rotating rod (18) penetrates through the shaft sleeve (17), rotary fan blades (19) are uniformly distributed on the outer surface of the rotating rod (18), a thin rod (20) is fixedly arranged at the other end of the rotating rod (18), a brush contacted with the surface of the filter plate (15) is arranged on the thin rod (20), an ash collection pipe (21) is arranged at the bottom end of the inlet pipe (4), the utility model discloses a dust collecting pipe, including ash collecting pipe (21), exit tube (5), metal threaded rod (51) surface is the threadiness, metal threaded rod (51) one end internal thread inserts and is equipped with screw inserted bar (52), screw inserted bar (52) surface fixed cover is equipped with the axle sleeve, axle sleeve surface paste is equipped with superfine glass cotton (53), exit tube (5) surface is seted up relevant closed groove (54), close on groove (54) through the relevant closed door (55) of hinge installation, close and fixedly be equipped with screw lock piece (56) on door (55) lateral wall, the thread buckle block (56) is provided with a thread opening, the inner side of the closing door (55) is provided with leakage-proof sealing cotton, the mounting sealing mechanism comprises a first sealing ring (22) arranged on the inner wall of the second silencing pipe (2), the outer surface of the first silencing pipe (1) is fixedly sleeved with a cylinder (23), the inner wall of the cylinder (23) is provided with a second sealing ring (24), the outer surface of the cylinder (23) and the outer wall of the second silencing pipe (2) are both fixedly provided with corresponding plates (25), the corresponding plates (25) on the second silencing pipe (2) are L-shaped, the corresponding plates (25) on the cylinder (23) are provided with insertion openings, and the corresponding plates (25) are fixed through screws; the sound absorption board (13) comprises an upper noise reduction board (26), a porous foam board (27) and a lower noise reduction board (28), the upper noise reduction board (26), the porous foam board (27) and the lower noise reduction board (28) are in a forming arrangement, an auxiliary sound penetration port is formed in the upper noise reduction board (26) and the lower noise reduction board (28), a cavity is formed in the upper noise reduction board (26) and the lower noise reduction board (28), cross-shaped hollow sound insulation columns (29) are arranged in the upper noise reduction board (26) and the lower noise reduction board (28), and sound insulation cotton blocks are arranged on the inner wall of each hollow sound insulation column (29).

3. The low-noise silencer according to claim 2, wherein the first noise reduction mechanism comprises a sound-proof cover (30) fixed on the inner wall of the first noise reduction chamber (9), the sound-proof cover (30) is provided with an air inlet (31) on the inlet pipe (4), a sound-proof air pipe (32) corresponding to the air inlet (31) is fixedly arranged on the outer wall of the inlet pipe (4), the inner wall of the sound-proof air pipe (32) and the inner wall of the sound-proof cover (30) are both provided with second sound-absorbing cotton (33), the inner wall of the sound-proof air pipe (32) is uniformly distributed with noise reduction sheets (34), the number of the noise reduction sheets (34) is several, the noise reduction sheets are arranged in parallel, the inner wall of the first noise reduction chamber (9) is provided with auxiliary noise reduction sheets (35) positioned in the sound-proof cover (30), and the auxiliary noise reduction sheets (35) are arranged in a wave shape, and the sound-proof housing (30) is uniformly distributed with air outlet thin openings, and the inlet pipe (4) is provided with a vent pipe (36) communicated with the inside of the sound-proof housing (30).

4. A low noise silencer according to claim 2, wherein the second noise reduction mechanism comprises a secondary sound insulation air pipe (37) disposed on the third sound insulation plate (8), two symmetrical fixing blocks (38) are fixedly disposed on the inner wall of the fourth sound insulation chamber (12), inclined plates (39) in a splayed shape are respectively linked to the fixing blocks (38), the inclined plates (39) are connected through spring pieces, and the air outlet end of the secondary sound insulation air pipe (37) is located between the inclined plates (39).

5. The low noise silencer according to claim 4, wherein the inclined plate (39) is hollow, and the inclined plate (39) is filled with sound insulation cotton blocks, and sound holes are formed in the surface of the inclined plate.

6. A low noise silencer according to claim 2, wherein a plurality of sound insulation boards (40) are disposed inside the second silencing tube (2), wherein a flow equalizing plate (41) is disposed on one of the sound insulation boards (40), the sound insulation board (40) on one side of the flow equalizing plate (41) is filled with a catalyst layer (42), and the other sound insulation board (40) is filled with an activated carbon mesh (43).

7. The low noise silencer according to claim 2, wherein the filter plate (15) comprises a circular plate (44) with the same inner diameter as the first silencing pipe (1), the filter screen is embedded in the middle of the circular plate (44), a circular arc (45) is formed on the outer surface of the bottom of the inlet pipe (4), a circular arc plate (46) matched with the circular arc (45) is fixedly arranged at the bottom of the circular plate (44), and a mounting piece (47) is fixedly arranged on the outer surface wall of the circular arc plate (46).

8. A low noise silencer according to claim 7, wherein a sealing gasket (48) is provided on the outer side wall of the circular arc plate (46), and the sealing gasket (48) is made of soft rubber.

9. A low noise silencer according to claim 1, wherein the outer surfaces of the first silencer duct (1) and the second silencer duct (2) are provided with wear resistant layers, and the outer sides of the wear resistant layers are provided with rust-proof paint layers.

Technical Field

The invention relates to the field of silencers, in particular to a low-noise silencer.

Background

The silencer is a device for preventing sound transmission and allowing airflow to pass through, is an important measure for eliminating aerodynamic noise, and is frequently used in the fields of power generation plants and chemical plants, and the principle of the silencer in the field is that the silencer is composed of two pipelines with different lengths, the two pipelines are separated and then converged, so that two rows of sound waves are mutually offset when being interfered during superposition to weaken sound intensity, reduce sound and further achieve the effect of silencing. And the internal environment of the existing power generation plant and chemical plant contains a large amount of granular impurities, the impurities enter the silencer and easily block holes inside the silencer, the working efficiency of the silencer is reduced, and meanwhile, the silencing effect of the existing silencer is poor.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

The present invention is directed to a low noise silencer to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme:

a low-noise silencer comprises a first round silencing pipe and a second round silencing pipe, wherein the diameter of the first silencing pipe is smaller than that of the second silencing pipe, and the first silencing pipe is connected with the second silencing pipe through a mounting sealing mechanism.

Furthermore, the first silencing pipe and the second silencing pipe are both provided with first sound absorption cotton, the first silencing pipe is provided with an inlet pipe, the second silencing pipe is provided with an outlet pipe, the first silencing pipe is internally provided with a first silencing plate, a second silencing plate and a third silencing plate which are provided with sound holes, the first silencing pipe is internally divided into a first silencing cavity, a second silencing cavity, a third silencing cavity and a fourth silencing cavity by the first silencing plate, the second silencing cavity and the third silencing cavity are respectively provided with a sound absorption plate, the sound absorption plate is arranged on the side wall of the sound absorption plate on the second silencing cavity, the first silencing cavity is internally provided with a first noise reduction mechanism, the fourth silencing cavity is internally provided with a second noise reduction mechanism, the inlet pipe is provided with a dust removal mechanism, the dust removal mechanism comprises a filter plate which is arranged in the inlet pipe by a dismounting mechanism, the inner part of the inlet pipe is fixedly provided with a mounting frame, the middle part of the mounting frame is provided with an embedded shaft sleeve, a rotating rod penetrates through the inner part of the shaft sleeve, the outer surface of the rotating rod is uniformly provided with rotating fan blades, the other end of the rotating rod is fixedly provided with a thin rod, the thin rod is provided with a brush which is contacted with the surface of the filter plate, the bottom end of the inlet pipe is provided with an ash collecting pipe, the outer wall of the bottom end of the ash collecting pipe is in a shape of an arc pipe in a threaded connection way, the tail end of the outlet pipe is in the shape of an arc pipe, the side wall of the tail end of the outlet pipe is provided with a plurality of shunt pipes, the inner wall of the shunt pipe is uniformly provided with a plurality of inclined grinding sound sheets in a distributed way, the inner wall of the arc pipe of the outlet pipe is fixedly provided with a metal threaded rod through a plurality of thin rods, the outer surface of the metal threaded rod is in a threaded shape, a threaded insert rod is inserted in the inner thread at one end of the metal threaded rod, and the shaft sleeve is fixedly sleeved on the outer surface of the threaded insert rod, the outer surface of the shaft sleeve is stuck with superfine glass wool, the outer surface of the outlet pipe is provided with a related closed groove, the closed groove is provided with a related door through a hinge, the outer side wall of the closed door is fixedly provided with a threaded buckling block, the threaded buckling block is provided with a threaded opening, the inner side of the closed door is provided with leakproof sealing cotton, the mounting sealing mechanism comprises a first sealing ring arranged on the inner wall of the second silencing pipe, the outer surface of the first silencing pipe is fixedly sleeved with a cylinder, the inner wall of the cylinder is provided with a second sealing ring, the outer surface of the cylinder and the outer wall of the second silencing pipe are both fixedly provided with corresponding plates, the corresponding plates on the second silencing pipe are L-shaped, the corresponding plates on the cylinder are provided with inserting openings, and the corresponding plates are fixed through screws; the sound absorption board comprises an upper noise reduction board, a porous foam board and a lower noise reduction board, wherein the upper noise reduction board is formed by the porous foam board and the lower noise reduction board, auxiliary sound penetrating ports are formed in the upper noise reduction board and the lower noise reduction board, cavities are formed in the upper noise reduction board and the lower noise reduction board, cross-shaped hollow sound insulation columns are arranged in the upper noise reduction board and the lower noise reduction board, and sound insulation cotton blocks are arranged on the inner walls of the hollow sound insulation columns.

Further, the first mechanism of making an uproar of falling is including fixing sound-proof housing on the first amortization intracavity wall, the sound-proof housing, advance and seted up the air intake on the pipe, just advance fixedly on the tub outer wall be equipped with the corresponding syllable-dividing tuber pipe of air intake, syllable-dividing tuber pipe inner wall with the sound-proof housing inner wall all is provided with the second sound absorption cotton, syllable-dividing tuber pipe inner wall evenly distributed is equipped with the amortization piece, amortization piece quantity is a plurality of and is mutual parallel arrangement, be provided with on the first amortization intracavity wall and be located vice amortization piece in the sound-proof housing, vice amortization piece is the wave type setting, just evenly distributed is provided with the air-out thin mouthful on the sound-proof housing, advance be provided with on the pipe with the inside communicating breather pipe of sound-proof housing.

Further, the mechanism of making an uproar falls in the second is including setting up vice syllable-dividing tuber pipe on the third silencing board, the fixed two symmetrical fixed blocks that are equipped with of fourth silencing intracavity wall, it is provided with the hang plate that is the splayed form all to link on the fixed block, connect through the spring leaf between the hang plate, the air-out end of vice syllable-dividing tuber pipe is located between the hang plate.

Furthermore, the inclined plate is internally hollow, soundproof cotton blocks are filled in the inclined plate, and sound holes are formed in the surface of the inclined plate.

Furthermore, a plurality of sound insulation boards are arranged in the second silencer, one of the sound insulation boards is provided with a flow equalizing plate, the inside of the sound insulation board positioned on one side of the flow equalizing plate is filled with a catalyst layer, and the inside of the other sound insulation board is filled with an activated carbon net.

Further, the filter includes with the circular slab that first amortization inside pipe footpath equals, the inserted filter screen that is provided with in circular slab middle part, advance tub bottom surface and seted up circular arc mouth, the fixed circular slab bottom be equipped with circular arc mouth assorted circular arc board, fixed the installation piece that is equipped with on the circular arc board surface wall.

Furthermore, a sealing gasket is arranged on the outer side wall of the circular arc plate, and the sealing gasket is made of soft rubber.

Furthermore, the outer surfaces of the first silencing pipe and the second silencing pipe are both provided with wear-resistant layers, and the outer sides of the wear-resistant layers are provided with antirust paint layers.

Compared with the prior art, the invention has the following beneficial effects:

firstly, the air flow enters the first silencing pipe and the second silencing pipe through the inlet pipe, and is dedusted by the dedusting mechanism, so that the entering air flow is ensured to be clean gas, when the silencer is used, and when the air flow enters, the rotating fan blades are blown to drive the thin rods to rotate, and then the thin rods drive the hairbrushes to rotate, so that the hairbrushes brush the filter plates to brush impurities on the filter plates to avoid the filter plates from being blocked, and the filter plates are detachably mounted, the inner filter plates can be replaced, the brushed impurities slide into the ash collecting pipe, and the filtered impurities can be taken out by opening the sealing covers, so that the silencer has a filtering function, is not easy to block the filter plates and is convenient to take out the filtered impurities, and then the filtered impurities sequentially enter the first silencing pipe and the second silencing pipe, the first sound absorption cotton on the inner walls of the first silencing pipe and the second silencing pipe plays a good sound insulation effect, and the sound is weakened to be transmitted out, the interior of the silencer is divided into a first silencing cavity, a second silencing cavity, a third silencing cavity and a fourth silencing cavity through a first silencing plate, a second silencing plate and a third silencing plate, silencing is carried out to different degrees, the cross section areas of different silencing cavities and parts are mutually changed, a gas flow channel is bent and complex, sound energy is reflected and expanded for multiple times in the silencing cavity to be consumed, the eliminating effect of noise in each frequency band is ensured to the maximum extent, the sound energy is partially reflected and expanded to eliminate noise in high, medium and low frequency bands, air flow firstly enters the first silencing cavity, a first noise reduction mechanism is arranged in the first silencing cavity to carry out preliminary silencing, the air flow enters the second silencing cavity after being weakened, secondary silencing is carried out by matching with the sound absorption plates and the silencing bowls, the working principle of the sound absorption plates in the third silencing cavity is the same as that of the sound absorption plates in the second small sound cavity, then the sound enters a fourth silencing cavity, and the second noise reduction mechanism is arranged for reducing noise again, so that a good sound absorption effect is achieved, finally, low-noise frequency band noise enters a second silencing pipe, and the first sound absorption cotton in the second silencing pipe achieves final silencing, so that the noise is reduced to be extremely low;

the first silencing pipe is inserted into the second silencing pipe, the first sealing ring wraps the outer surface of the insertion end of the first silencing pipe to achieve sealing connection, air leakage is avoided during pipe connection, after a sealed pipeline is connected, the outer surface of the wrapping end of the second silencing pipe at the moment is inserted into the cylinder, the outer surface of the wrapping end of the second silencing pipe is wrapped by the second sealing ring to achieve resealing, sealing performance during connection is guaranteed, airflow leakage is avoided, exhaust is smoother, the two corresponding plates are inserted into each other and then fixed through screws, connection disassembly is facilitated, and the purpose of facilitating replacement of subsequent replacement is achieved;

the air produces in the exit tube and flows, and its in-process drives the superfine glass cotton and rotates, and the sound wave of the pulsation noise that superfine glass cotton and air current produced fully contacts, carries out high-efficient amortization, and opens and close the door after, because the screw-inserted bar is threaded connection in metal threaded rod one end, consequently can manually dismantle out the screw-inserted bar, carries out the superfine glass cotton on the screw-inserted bar and changes.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a front view of a low noise silencer in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of a first muffler pipe of a low noise muffler according to an embodiment of the present invention;

FIG. 3 is a schematic illustration of an inlet pipe of a low noise silencer in accordance with an embodiment of the present invention;

FIG. 4 is a schematic illustration of a sound absorbing panel of a low noise muffler according to an embodiment of the present invention;

FIG. 5 is a schematic view of a second muffler pipe of a low noise muffler according to an embodiment of the present invention;

FIG. 6 is a schematic view of a first noise reduction mechanism of a low noise silencer in accordance with an embodiment of the present invention;

FIG. 7 is a filter board mounting schematic of a low noise silencer according to an embodiment of the present invention;

fig. 8 is a schematic view of the interior of an outlet pipe of a low noise silencer in accordance with an embodiment of the present invention.

Reference numerals:

1. a first silencer duct; 2. a second muffler pipe; 3. a first sound absorbing cotton; 4. feeding a pipe; 5. discharging a pipe; 6. a first acoustical panel; 7. a second acoustical panel; 8. a third sound-deadening panel; 9. a first muffling chamber; 10. a second muffling chamber; 11. a third sound-deadening chamber; 12. a fourth muffling chamber; 13. a sound-absorbing panel; 14. a silencing bowl; 15. a filter plate; 16. a mounting frame; 17. a shaft sleeve; 18. a rotating rod; 19. rotating the fan blades; 20. a thin rod; 21. an ash collecting pipe; 22. a first seal ring; 23. a cylinder; 24. a second seal ring; 25. a corresponding plate; 26. an upper noise reduction plate; 27. a porous foam sheet; 28. a lower noise reduction plate; 29. a hollow sound-insulating column; 30. a sound-proof housing; 31. an air inlet; 32. a sound insulation air pipe; 33. a second sound absorbent cotton; 34. a silencing sheet; 35. an auxiliary silencing plate; 36. a breather pipe; 37. an auxiliary soundproof air duct; 38. a fixed block; 39. an inclined plate; 40. a sound insulating board; 41. a flow equalizing plate; 42. a catalyst layer; 43. an activated carbon mesh; 44. a circular plate; 45. a circular arc mouth; 46. a circular arc plate; 47. mounting a sheet; 48. sealing gaskets; 49. a diversion pipeline; 50. inclining the sound grinding sheet; 51. a metal threaded rod; 52. a threaded bayonet; 53. ultra-fine glass wool; 54. closing the groove; 55. closing the door; 56. and (4) a thread buckling block.

Detailed Description

The invention is further described with reference to the following drawings and detailed description:

in order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.

The first embodiment is as follows:

referring to fig. 1 to 8, a low noise silencer according to an embodiment of the present invention includes a circular first silencing pipe 1 and a circular second silencing pipe 2, the diameter of the first silencing pipe 1 is smaller than the diameter of the second silencing pipe 2, the first silencing pipe 1 and the second silencing pipe 2 are connected by a sealing mechanism, first sound-absorbing cotton 3 is disposed on inner walls of the first silencing pipe 1 and the second silencing pipe 2, an inlet pipe 4 is mounted on the first silencing pipe 1, an outlet pipe 5 is mounted on the second silencing pipe 2, a first silencing plate 6 with sound holes, a second silencing plate 7 and a third silencing plate 8 are disposed inside the first silencing pipe 1, the first silencing pipe 1 is partitioned into a first silencing cavity 9, a second silencing cavity 10, a third silencing cavity 11 and a fourth silencing cavity 12 by the first silencing plate 6, the second silencing plate 7 and the third silencing plate 8, the inner walls of the second silencing cavity 10 and the third silencing cavity 11 are both provided with a sound-absorbing plate 13, a silencing bowl 14 is arranged on the side wall of the sound-absorbing plate 13 on the second silencing cavity 10, a first noise reduction mechanism is arranged in the first silencing cavity 9, a second noise reduction mechanism is arranged in the fourth silencing cavity 12, a dust removal mechanism is arranged on the inlet pipe 4, the dust removal mechanism comprises a filter plate 15 which is arranged in the inlet pipe 4 through a disassembly mechanism, a mounting frame 16 is fixedly arranged in the inlet pipe 4, a shaft sleeve 17 is arranged in the middle of the mounting frame 16 in an embedded manner, a rotating rod 18 penetrates through the shaft sleeve 17, rotary fan blades 19 are uniformly distributed on the outer surface of the rotating rod 18, a thin rod 20 is fixedly arranged at the other end of the rotating rod 18, a brush which is contacted with the surface of the filter plate 15 is arranged on the thin rod 20, and an ash collecting pipe 21 is arranged at the bottom end of the inlet pipe 4, the outer wall of the bottom end of the ash collecting pipe 21 is in threaded connection with a sealing cover, the tail end of the outlet pipe 5 is in an arc-shaped pipe shape, a plurality of shunt pipes 49 are arranged on the side wall of the tail end of the outlet pipe 5, a plurality of inclined grinding sound pieces 50 are uniformly distributed on the inner wall of the shunt pipes 49, a metal threaded rod 51 is fixedly arranged on the inner wall of the arc-shaped pipe of the outlet pipe 5 through a plurality of thin rods, the outer surface of the metal threaded rod 51 is in a threaded shape, a threaded insertion rod 52 is inserted into the internal threads of one end of the metal threaded rod 51, a shaft sleeve is fixedly arranged on the outer surface of the threaded insertion rod 52, superfine fine glass wool 53 is pasted on the outer surface of the shaft sleeve, a related closed groove 54 is formed on the outer surface of the outlet pipe 5, a related closed door 55 is installed on the groove 54 through a hinge, a threaded buckling block 56 is fixedly arranged on the outer side wall of the closed door 55, and a threaded hole is formed on the threaded buckling block 56, the inboard leak protection sealing cotton that is equipped with of closedown door 55, installation sealing mechanism is including setting up the first sealing washer 22 of 2 inner walls of second hush pipe, 1 outer fixed surface cover of first hush pipe is equipped with drum 23, drum 23 inner wall is provided with second sealing washer 24, drum 23 surface with all fixed being equipped with corresponding board 25 on the 2 outer walls of second hush pipe, on the second hush pipe 2 corresponding board 25 is the L type, just drum 23 is last the socket has been seted up on corresponding board 25, fix through the screw between corresponding board 25.

Example two:

referring to fig. 1 to 5, the sound-absorbing plate 13 includes an upper noise-reducing plate 26, a porous foam plate 27 and a lower noise-reducing plate 28, the upper noise-reducing plate 26, the porous foam plate 27 and the lower noise-reducing plate 28 are formed, the upper noise-reducing plate 26 and the lower noise-reducing plate 28 are both provided with auxiliary sound-penetrating openings, the upper noise-reducing plate 26 and the lower noise-reducing plate 28 are both provided with hollow cavities, the upper noise-reducing plate 26 and the lower noise-reducing plate 28 are both provided with crossed hollow sound-insulating columns 29, the inner walls of the hollow sound-insulating columns 29 are provided with sound-insulating cotton blocks, the first noise-reducing mechanism includes a sound-insulating cover 30 fixed on the inner wall of the first sound-insulating cavity 9, the inlet pipe 4 is provided with an air inlet 31, the outer wall of the inlet pipe 4 is fixedly provided with a sound-insulating air pipe 32 corresponding to the air inlet 31, the inner walls of the sound-insulating air pipe 32 and the sound-insulating cover 30 are both provided with second sound-absorbing cotton 33, the utility model discloses a soundproof air duct 32 inner wall evenly distributed is equipped with noise damping sheet 34, noise damping sheet 34 quantity is a plurality of and is mutual parallel arrangement, be provided with on the first noise damping intracavity 9 inner wall and be located the vice noise damping sheet 35 in the sound-proof housing 30, vice noise damping sheet 35 sets up for the wave type, just evenly distributed is provided with the air fine opening on the sound-proof housing 30, advance be provided with on the pipe 4 with inside communicating breather pipe 36 of sound-proof housing 30, the mechanism of making an uproar is fallen including setting up the vice syllable-dividing tuber pipe 37 on the third sound-proof board 8, the fixed two symmetrical fixed blocks 38 that are equipped with of fourth noise damping intracavity 12 inner wall, all link on the fixed block 38 and be provided with the hang plate 39 that is the splayed form, connect through the spring leaf between the hang plate 39, the air-out end of vice syllable-dividing tuber pipe 37 is located between the hang plate 39, the inside cavity form that is of hang plate 39, and the inside of the inclined plate 39 is filled with soundproof cotton blocks, and sound holes are formed in the surface of the inclined plate.

Through the scheme of the invention, the beneficial effects are as follows: when sound passes through the second silencing cavity 10 and the third silencing cavity 11, the sound firstly enters the lower noise reduction plate 28, is primarily silenced through the hollow sound insulation column 29 arranged inside, and then enters the porous foam plate 27, at the moment, the porous structure of the porous foam plate 27 can absorb the energy of the sound, and finally the rest sound is internally silenced through the porous upper noise reduction plate 26, so that the sound insulation cotton blocks on the inner wall of the hollow sound insulation column 29 can achieve the purpose of further reducing the sound and the noise, when the air flow is initially entered into the first silencing cavity 9 through the inlet pipe 4, part of the air flow enters the sound insulation cover 30 through the air inlet 31 and the sound insulation pipe 32, the sound insulation sheets in the sound insulation cover 30 and the sound insulation pipe 32 are arranged in a refraction and staggering way, so that multiple refraction or diffraction can be generated on the noise, the energy of the noise is reduced, and the entry into the subsequent silencing cavities is reduced, the noise isolation degree is improved, the design of the vent pipe 36 is realized, the air flow in the inlet pipe 4 is filtered and then is discharged into the sound-proof cover 30 by matching with the vent pipe 36, the air flow discharged by the vent pipe 36 and the air flow discharged by the sound-proof air pipe 32 collide with each other on the auxiliary silencing sheet 35, so that the auxiliary silencing sheet 35 collides with the air flow to reduce the air flow sound, and finally the sound is greatly reduced, and the micro-openings can be formed on the auxiliary silencing sheet 35 to facilitate the repeated penetration of the air flow and increase the sound weakening effect, the air flow discharged by the auxiliary sound-proof air pipe 37 is blown onto the two inclined plates 39, the arranged spring pieces can drive the inclined plates 39 to vibrate well, the noise of the air flow is collided for a plurality of times, and then the energy of the sound is lost, the sound-proof cotton blocks are filled in the inclined plates 39 to perform silencing, and the sound collides with the inner walls of the inclined plates 39 for a plurality of times, the energy of the sound is repeatedly lost, the silencing effect is achieved, and the high-frequency section noise of the sound achieves a good silencing effect.

Example three:

referring to fig. 5 and 7, a plurality of sound insulation plates 40 are disposed inside the second muffling tube 2, wherein one of the sound insulation plates 40 is provided with a flow equalizing plate 41, the sound insulation plate 40 located on one side of the flow equalizing plate 41 is filled with a catalyst layer 42, the other sound insulation plate 40 is filled with an activated carbon mesh 43, the filter plate 15 includes a circular plate 44 having an inner diameter equal to that of the first muffling tube 1, a filter screen is embedded in the middle of the circular plate 44, a circular arc 45 is disposed on the outer surface of the bottom of the inlet tube 4, a circular arc plate 46 matched with the circular arc 45 is fixedly disposed at the bottom of the circular plate 44, a mounting plate 47 is fixedly disposed on the outer surface wall of the circular arc plate 46, a sealing gasket 48 is disposed on the outer surface of the circular arc plate 46, and the sealing gasket 48 is made of soft rubber.

Through the scheme of the invention, the beneficial effects are as follows: the sound insulation board 40 is provided with the flow equalizing plate 41 to enable the air flow entering the second silencing pipe 2 to be stable, the designed sound insulation board 40 is filled with the catalyst layer 42 and the activated carbon net 43 to purify the air flow inside the sound insulation board and enable the purified air to be discharged, and the activated carbon net 43 is arranged close to the outer side, so that when the silencer is not used, external dust can be filtered through the activated carbon net 43 to prevent the external dust from being adsorbed on the catalyst layer 42 and affecting the purification effect, when the filter plate 15 is installed, the circular plate 44 is directly inserted into the pipe 4 through the circular arc opening 45, the circular plate 44 is attached to the inner wall of the pipe 4, and the circular plate 44 can be adhered to the circular outer wall of the circular plate 44 to ensure that the circular plate 44 is attached to the inner wall of the pipe 4 more tightly, and finally the installation piece 47 is contacted with the outer wall of the pipe 4 and is inserted by matching with a screw, the filter plate 15 is fixed, it being noted that the first 6, second 7, third 8 and acoustic panels 40 can also be designed to be removably mounted, in correspondence with the filter plate mounting design features.

Example four:

referring to fig. 8, the outer surfaces of the first muffling pipe 1 and the second muffling pipe 2 are both provided with wear-resistant layers, and the outer sides of the wear-resistant layers are provided with anti-rust paint layers.

Through the scheme of the invention, the beneficial effects are as follows: the wear-resistant layer and the antirust paint layer are designed outside the silencing pipe, so that the antirust and wear-resistant properties of the outer wall of the silencing pipe are ensured, and the service life of the silencing pipe is prolonged.

For the convenience of understanding the above technical solutions of the present invention, the following detailed description is made of the working principle or the operation mode of the present invention in the practical process:

in practical application, firstly, the air flow enters the first silencing pipe 1 and the second silencing pipe 2 through the inlet pipe 4, the dust is firstly removed through the dust removing mechanism, the entering air flow is ensured to be clean gas, when the dust removing device is used, and when the air flow enters, the rotating fan blade 19 is blown to drive the thin rod 20 to rotate, the thin rod 20 drives the hairbrush to rotate, the hairbrush brushes the filter plate 15, impurities on the filter plate 15 are brushed off, the filter plate 15 is prevented from being blocked, and the filter plate 15 is detachably mounted, the filter plate 15 inside can be replaced, the brushed impurities slide into the dust collecting pipe 21, the filtered impurities can be taken out by opening the sealing cover, the filtering function is realized, the filter plate 15 is not easy to be blocked, and the filtered impurities are convenient to be taken out, secondly, the first silencing pipe 1 and the second silencing pipe 2 sequentially enter the first silencing pipe 3 on the inner walls of the first silencing pipe 1 and the second silencing pipe 2, the first sound absorption cotton 3 on the inner walls of the first silencing pipe 1 and the second silencing pipe 2 has good sound absorption effect, the interior of the first silencing pipe 1 is divided into a first silencing cavity 9, a second silencing cavity 10, a third silencing cavity 11 and a fourth silencing cavity 12 by a first silencing plate 6, a second silencing plate 7 and a third silencing plate 8 for silencing to different degrees, the cross section areas of different silencing cavities and parts are changed mutually, a gas flow channel is bent and complex, sound energy is reflected and expanded for multiple times in the silencing cavities to be consumed, the silencing effect of noise in each frequency section is ensured to the maximum extent, the sound energy is partially reflected and expanded, so that high, medium and low frequency section noise is eliminated, airflow firstly enters the first silencing cavity 9, a first noise reduction mechanism is arranged in the first silencing cavity 9 for primary silencing, the airflow enters the second silencing cavity 10 after weakening, and the airflow is matched with a sound absorption plate 13 and a silencing bowl 14 for secondary silencing, the working principle of the sound-absorbing board 13 in the third silencing cavity 11 is the same as that of the sound-absorbing board 13 in the second small sound cavity, then the sound-absorbing board enters the fourth silencing cavity 12, and the second noise reduction mechanism is used for reducing noise again, so that a good sound-absorbing effect is achieved, finally, low-noise frequency band noise enters the second silencing pipe 2, and the first sound-absorbing cotton 3 in the second silencing pipe 2 achieves final silencing, so that the noise is reduced to be extremely low;

the first silencing pipe 1 is inserted into the second silencing pipe 2, the first sealing ring 22 wraps the outer surface of the insertion end of the first silencing pipe 1 to achieve sealing connection, the occurrence of air leakage during pipe connection is avoided, after the sealed pipeline is connected, the outer surface of the wrapping end of the second silencing pipe 2 at the moment is inserted into the cylinder 23, the outer surface of the wrapping end of the second silencing pipe 2 is wrapped by the second sealing ring 24 to achieve resealing, the sealing performance during connection is guaranteed, air flow leakage is avoided, exhaust is smoother, the two corresponding plates 25 are inserted into each other and then fixed through screws, connection disassembly is facilitated, and the purpose of convenient replacement of subsequent replacement is achieved;

the air flows in the exit tube 5, the superfine glass wool 53 is driven to rotate in the process, the superfine glass wool 53 is fully contacted with the sound wave of the pulsating noise generated by the air flow, the high-efficiency noise reduction is carried out, and after the door 55 is opened and closed, the threaded insert rod 52 is in threaded connection with one end of the metal threaded rod 51, so that the threaded insert rod 52 can be manually detached, and the superfine glass wool 53 on the threaded insert rod 52 can be replaced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.