CN111243566A

CN111243566A - Low-decibel silencer

Info

Publication number: CN111243566A
Application number: CN202010149193.2A
Authority: CN
Inventors: 余志山
Original assignee: Hangzhou Rantechnetium Purification Technology Co Ltd
Current assignee: Hangzhou Rantechnetium Purification Technology Co Ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-06-05

Abstract

The invention discloses a low-decibel silencer, which comprises a cylindrical barrel, an air inlet pipe and an air outlet pipe, wherein a first side cover is welded on the side part of the cylindrical barrel, one end of the cylindrical barrel, which is far away from the first side cover, is in threaded connection with a second side cover, the air inlet pipe is communicated with the central part of the first side cover, the air inlet pipe extends into the cylindrical barrel, the air outlet pipe is communicated with the central part of the second side cover, one end, which is opposite to the cylindrical barrel, of the air outlet pipe is connected with a main silencing pipe, the outer side of the end part of the main silencing pipe is in threaded connection with a sound insulation disc, four groups of branch silencing pipes are arranged on the central side part of the second side cover in an annular array mode, sintered polypropylene sleeves are arranged between the four groups of branch silencing pipes. The invention adopts the sintered polypropylene as the main part for sound absorption, has low overall cost, is convenient for the disassembly and the assembly of the sintered polypropylene sleeve and the sintered polypropylene lining, and is convenient for the replacement after the damage.

Description

Low-decibel silencer

Technical Field

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

Background

The silencer is a noise reduction device such as a pipe with a sound absorption lining and an elbow or a pipe with suddenly changed sectional area and other discontinuous acoustic impedances and is used for attenuating or reflecting noise in the pipe for an airflow pipe with noise transmission, wherein the noise reduction device is called as a resistive silencer, the noise reduction device is called as a reactive silencer, and the noise reduction device also comprises an impedance composite silencer.

The silencer is used for reducing exhaust pulsation and reducing exhaust noise as far as possible, the silencer is selected according to fireproof, damp-proof, anticorrosive and cleanliness requirements, installation space position, noise source frequency spectrum characteristics, system natural sound attenuation, system airflow regeneration noise, room allowable noise level, allowable pressure loss, equipment price and other factors, and is heavier according to actual conditions.

However, the existing silencer generally adopts the winding glass wool silencing paper as the sound absorption lining, and in the using process, the glass wool silencing paper has high manufacturing cost, is easy to damage and short in service life, and is troublesome to replace subsequently, so that the use is not facilitated.

Disclosure of Invention

The invention aims to provide a low-decibel silencer, which adopts sintered polypropylene as a main part for sound absorption, has low overall cost, is convenient for dismounting and mounting a sintered polypropylene sleeve and a sintered polypropylene lining, and is convenient for replacement after damage, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a low-decibel muffler comprises a cylindrical barrel, an air inlet pipe and an exhaust pipe, wherein a first side cover is welded on the side portion of the cylindrical barrel, a second side cover is connected to one end, far away from the first side cover, of the cylindrical barrel through threads, the air inlet pipe is communicated with the center of the first side cover, the air inlet pipe extends into the cylindrical barrel, a conical block is fixedly connected to the center side portion of the first side cover through a bolt, a connecting block is installed on the side portion of the conical block, the conical block and the connecting block are both sleeved on the outer side of the air inlet pipe, the exhaust pipe is communicated with the center of the second side cover, one end of the exhaust pipe extends into the cylindrical barrel, one end, opposite to the cylindrical barrel, of the exhaust pipe is connected with a main muffling pipe, the outer side of the end portion of the main muffling pipe is in threaded connection with a soundproof disc, the end parts of the four groups of branch silencing tubes are abutted against the side wall of the sound insulation disc, a sintered polypropylene sleeve is arranged between the four groups of branch silencing tubes and the main silencing tube, a sintered polypropylene lining is arranged between the four groups of branch silencing tubes and the inner wall of the cylindrical barrel, and the four groups of sintered polypropylene linings are connected with the sintered polypropylene sleeve.

Preferably, the inner wall of the cylindrical barrel is a smooth surface, an external thread section is arranged on the outer side of one end, away from the first side cover, of the cylindrical barrel, an internal thread section matched with the external thread section is arranged on the inner side of the second side cover, the second side cover is in threaded connection with the cylindrical barrel under the matching of the internal thread section and the external thread section, a cylindrical block is installed on the side portion of the second side cover, the exhaust pipe penetrates through the middle of the cylindrical block and is communicated with the outside, and a hand wheel is installed on the outer side of the cylindrical block.

Preferably, the blanking plate is installed at the end, located inside the cylindrical barrel, of the air inlet pipe, the first air guide holes are formed in the side wall, located inside the cylindrical barrel, of the air inlet pipe, flanges are installed at the end portions of the exhaust pipe and the air inlet pipe, a branch pipe is installed on the side portion of the exhaust pipe, and a safety valve is installed at the end portion of the branch pipe.

Preferably, toper piece and connecting block structure as an organic whole, be provided with the sealing washer between toper piece and the first side lid, the side view cross-section of connecting block is regular hexagon and sets up.

Preferably, a plurality of second air guide holes are formed in the middle of the sound insulation disc at equal intervals, the peripheral side wall of the sound insulation disc is in clearance fit with the inner wall of the cylindrical barrel, the central line of the sound insulation disc is coaxial with the central line of the main silencing pipe, and the side portion of the sound insulation disc is provided with a mounting groove matched with the main silencing pipe.

Preferably, the side wall of the main silencing pipe and the side wall of the branch silencing pipe are both provided with a plurality of third air guide holes, and the diameter of the main silencing pipe is 1cm-2cm larger than that of the branch silencing pipe.

Preferably, the sintered polypropylene sleeve and the four groups of sintered polypropylene liners are respectively provided with a framework at the central part, the outer wall annular array of the sintered polypropylene sleeve is provided with connecting grooves matched with the four groups of branch silencing tubes, the outer wall annular array of the sintered polypropylene sleeve is provided with four groups of sliding grooves, the inner wall of the four groups of sintered polypropylene liners is provided with four groups of sliding parts, the four groups of sliding parts are all inserted in the inner sides of the four groups of sliding grooves in a sliding manner, and the side-view cross sections of the four groups of sliding parts are all arranged in a convex shape.

Preferably, a stop lever is installed in the middle of the hand wheel, and a rubber sleeve is sleeved on the outer side of the hand wheel.

In summary, due to the adoption of the technology, the invention has the beneficial effects that:

in the invention, the air inlet pipe is connected with a pipeline which needs to be silenced, the air enters the interior of the cylindrical barrel from the air inlet pipe and flows through the four groups of branch silencing pipes, in the flowing process, the sound is absorbed through the sintered polypropylene sleeve and the sintered polypropylene lining, then the air is collected to the main silencing pipe and is discharged through the exhaust pipe, the sintered polypropylene is simply and conveniently used as a sound-absorbing material, and the integral production cost is reduced;

according to the invention, the rotation of the hand wheel drives the cylindrical block to rotate so as to drive the second side cover to rotate, and under the matching of the internal thread section and the external thread section, the second side cover is separated from the cylindrical barrel, so that the main silencing pipe, the four groups of branch silencing pipes and the sound insulation disc are pulled out from the inside of the cylindrical barrel, and the preliminary disassembly is simply and conveniently realized;

in the invention, the sound insulation disc is detached from the outer side of the main silencing pipe, then the four groups of sintered polypropylene linings are separated from the side parts of the four groups of branch silencing pipes under the matching of the sliding groove and the sliding part, and then the sintered polypropylene sleeve is pulled out from the outer side of the main silencing pipe under the matching of the connecting groove, so that the corresponding damaged part can be replaced according to the requirement, and the final detachment is realized;

in the invention, after the damaged part is replaced, according to the reverse steps of the upper part, the sintered polypropylene sleeve is firstly installed, then four groups of sintered polypropylene linings are installed, then the sound insulation disc is installed, and finally the sound insulation disc is connected with the cylindrical barrel, so that the integral installation can be realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic cross-sectional front view of a low decibel muffler of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1 of a low decibel muffler in accordance with the present invention;

FIG. 3 is a schematic cross-sectional side view of a portion of the sintered polypropylene sleeve and sintered polypropylene liner of a low decibel muffler in accordance with the present invention;

FIG. 4 is a schematic side view of a tapered block portion of a low decibel muffler of the present invention;

FIG. 5 is a schematic cross-sectional side view of a hand wheel portion of a low decibel muffler of the present invention;

FIG. 6 is a schematic cross-sectional side view of a sliding groove and a sliding block of a low-decibel muffler according to the present invention.

In the figure: 1. a cylindrical barrel; 2. an air inlet pipe; 3. an exhaust pipe; 4. a first side cover; 5. a second side cover; 6. a conical block; 7. connecting blocks; 8. a main muffler pipe; 9. a sound-insulating disc; 10. a branch silencing pipe; 11. sintering the polypropylene sleeve; 12. sintering the polypropylene lining; 13. an external threaded section; 14. an internal thread section; 15. a cylindrical block; 16. a hand wheel; 17. closing the plate; 18. a first air guide hole; 19. a flange; 20. a branch pipe; 21. a safety valve; 22. a seal ring; 23. a second air guide hole; 24. mounting grooves; 25. a third air guide hole; 26. a framework; 27. connecting grooves; 28. a chute; 29. a sliding part; 30. a gear lever; 31. a rubber sleeve.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "longitudinal", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The invention provides a low-decibel silencer as shown in figures 1-6, which comprises a cylindrical barrel 1, an air inlet pipe 2 and an air outlet pipe 3, wherein a first side cover 4 is welded on the side part of the cylindrical barrel 1, one end of the cylindrical barrel 1, which is far away from the first side cover 4, is in threaded connection with a second side cover 5, the air inlet pipe 2 is communicated with the central part of the first side cover 4, the air inlet pipe 2 extends to the inside of the cylindrical barrel 1, the central side part of the first side cover 4 is fixedly connected with a conical block 6 through a bolt, the side part of the conical block 6 is provided with a connecting block 7, the conical block 6 and the connecting block 7 are both sleeved on the outer side of the air inlet pipe 2, the air outlet pipe 3 is communicated with the central part of the second side cover 5, one end of the air outlet pipe 3 extends to the inside of the cylindrical barrel 1, and the end, the end part outer side of the main silencing pipe 8 is in threaded connection with a sound insulation disc 9, four groups of branch silencing pipes 10 are mounted on the central side part of the second side cover 5 in an annular array mode, the end parts of the branch silencing pipes 10 are all abutted to the side wall of the sound insulation disc 9, a sintered polypropylene sleeve 11 is mounted between each branch silencing pipe 10 and the corresponding main silencing pipe 8, a sintered polypropylene lining 12 is mounted between each branch silencing pipe 10 and the inner wall of the cylindrical barrel 1, and the sintered polypropylene linings 12 are connected with the sintered polypropylene sleeve 11.

Specifically, the inner wall of the cylindrical barrel 1 is a smooth surface, an external thread section 13 is arranged on the outer side of one end, away from the first side cover 4, of the cylindrical barrel 1, an internal thread section 14 matched with the external thread section 13 is arranged on the inner side of the second side cover 5, the second side cover 5 is in threaded connection with the cylindrical barrel 1 under the matching of the internal thread section 14 and the external thread section 13, a cylindrical block 15 is installed on the side portion of the second side cover 5, the middle portion of the exhaust pipe 3 penetrating through the cylindrical block 15 is communicated with the outside, a hand wheel 16 is installed on the outer side of the cylindrical block 15, the cylindrical block 15 is rotated by the hand wheel 16, the second side cover 5 is further rotated, and the disassembly or the assembly are performed under the matching of the internal thread section 14 and.

Specifically, the shrouding 17 is installed to the one end that intake pipe 2 is in the inside of cylindricality barrel 1, a plurality of first air guide hole 18 have been seted up to the lateral wall that intake pipe 2 is in the inside of cylindricality barrel 1, flange 19 is all installed to the tip of blast pipe 3 and intake pipe 2, branch pipe 20 is installed to the lateral part of blast pipe 3, relief valve 21 is installed to the tip of branch pipe 20, and shrouding 17 avoids gaseous direct entering main hush pipe 8's inside, and flange 19 is convenient to be connected with the outside pipeline, and relief valve 21 is convenient for open when pressure reaches the default.

Specifically, toper piece 6 and connecting block 7 structure as an organic whole, be provided with sealing washer 22 between toper piece 6 and the first side cap 4, connecting block 7's side view cross-section is regular hexagon and sets up, and sealing washer 22 is used for sealing.

Specifically, a plurality of second air guide holes 23 have been seted up to the even equidistance in middle part of the dish 9 that gives sound insulation, the periphery lateral wall of the dish 9 that gives sound insulation is clearance fit with the inner wall of cylindricality barrel 1, the central line of the dish 9 that gives sound insulation sets up with the central line of main hush pipe 8 coaxial, the lateral part of the dish 9 that gives sound insulation set seted up with main hush pipe 8 complex mounting groove 24, second air guide hole 23 is used for gaseous flow, and mounting groove 24 makes things convenient for main hush pipe 8 and the dish 9 that gives sound insulation to be connected, and the dish 9 that gives sound insulation is the rubber disk.

Specifically, the side wall of the main silencing tube 8 and the side wall of the branch silencing tube 10 are both provided with a plurality of third air guide holes 25, the diameter of the main silencing tube 8 is 1cm-2cm larger than that of the branch silencing tube 10, and the third air guide holes 25 are used for guiding air so as to facilitate the flow of the air.

Specifically, the central parts of the sintered polypropylene sleeve 11 and the four groups of sintered polypropylene liners 12 are provided with frameworks 26, the outer wall annular array of the sintered polypropylene sleeve 11 is provided with connecting grooves 27 matched with the four groups of the branch muffling pipes 10, the outer wall annular array of the sintered polypropylene sleeve 11 is provided with four groups of sliding grooves 28, the inner walls of the sintered polypropylene liners 12 are provided with four groups of sliding parts 29, the four groups of sliding parts 29 are all slidably inserted into the inner sides of the four groups of the sliding grooves 28, the side-view cross sections of the four groups of the sliding parts 29 are all arranged in a convex shape, the frameworks 26 increase the strength of the sintered polypropylene sleeve 11 and the sintered polypropylene liners 12, and the sintered polypropylene sleeve 11 and the sintered polypropylene liners 12 are conveniently connected through the matching of the sliding grooves 28 and the sliding parts 29.

Specifically, the mid-mounting of hand wheel 16 has shelves pole 30, the outside cover of hand wheel 16 is equipped with rubber sleeve 31, and shelves pole 30 conveniently rotates hand wheel 16, and rubber sleeve 31 is used for increasing the comfort level that hand wheel 16 was held to the hand.

The working principle is as follows: when the silencer is used, the air inlet pipe 2 is connected with a pipeline which needs to be silenced, air enters the interior of the cylindrical barrel 1 from the air inlet pipe 2 and flows through the four groups of branch silencing pipes 10, sound is absorbed through the sintered polypropylene sleeve 11 and the sintered polypropylene lining 12 in the flowing process, then the air is collected to the main silencing pipe 8 and is exhausted through the exhaust pipe 3, the sintered polypropylene is simply and conveniently used as a sound absorption material, and the integral production cost is reduced;

the rotation of the hand wheel 16 drives the cylindrical block 15 to rotate, and further drives the second side cover 5 to rotate, under the matching of the internal thread section 14 and the external thread section 13, the second side cover 5 is separated from the cylindrical barrel 1, and further the main silencing pipe 8, the four groups of branch silencing pipes 10 and the sound insulation disc 9 are drawn out from the inside of the cylindrical barrel 1, so that the preliminary disassembly is simply and conveniently realized;

the sound insulation disc 9 is detached from the outer side of the main silencing pipe 8, then the four groups of sintered polypropylene linings 12 are separated from the side parts of the four groups of branch silencing pipes 10 under the matching of the sliding grooves 28 and the sliding parts 29, and then the sintered polypropylene sleeve 11 is pulled out from the outer side of the main silencing pipe 8 under the matching of the connecting grooves 27, so that the corresponding damaged part can be replaced as required, and the final detachment is realized;

after the damaged part is replaced, according to the reverse steps of the upper part, the sintered polypropylene sleeve 11 is installed, then the four groups of sintered polypropylene linings 12 are installed, then the sound insulation disc 9 is installed, and finally the sound insulation disc is connected with the cylindrical barrel 1, so that the integral installation can be realized.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a low decibel muffler, includes cylindricality barrel (1), intake pipe (2) and blast pipe (3), its characterized in that: the lateral part of the cylindrical barrel body (1) is welded with a first side cover (4), one end, far away from the first side cover (4), of the cylindrical barrel body (1) is connected with a second side cover (5) in a threaded mode, the air inlet pipe (2) is communicated with the central part of the first side cover (4), the air inlet pipe (2) extends to the inside of the cylindrical barrel body (1), the central lateral part of the first side cover (4) is fixedly connected with a conical block (6) through bolts, a connecting block (7) is installed on the lateral part of the conical block (6), the conical block (6) and the connecting block (7) are both sleeved on the outer side of the air inlet pipe (2), the exhaust pipe (3) is communicated with the central part of the second side cover (5), one end of the exhaust pipe (3) extends to the inside of the cylindrical barrel body (1), and the opposite end of the exhaust pipe (3) and the cylindrical barrel body (1) is, the utility model discloses a cylindrical barrel, including the tip of main amortization pipe (8), the tip outside threaded connection of second side cap (5) has sound insulation dish (9), four sets of amortization pipes (10) are installed to the central lateral part annular array of second side cap (5), and four sets of the tip of propping up amortization pipe (10) all contradict with the lateral wall of sound insulation dish (9), four sets install sintering polypropylene sleeve (11) between branch amortization pipe (10) and main amortization pipe (8), four sets of all install sintering polypropylene lining (12) between the inner wall of propping up amortization pipe (10) and cylindrical barrel (1), four sets of sintering polypropylene lining (12) all link to each other with sintering polypropylene sleeve (11).

2. A low decibel muffler as defined in claim 1 wherein: the inner wall of cylindricality barrel (1) is the smooth surface, the one end outside that first side cap (4) were kept away from to cylindricality barrel (1) is provided with external screw thread section (13), the inboard of second side cap (5) is provided with and links to each other with external screw thread section (13) complex internal thread section (14), second side cap (5) and cylindricality barrel (1) internal thread section (14) and external screw thread section (13) cooperation lower screw thread, cylindricality piece (15) are installed to the lateral part of second side cap (5), blast pipe (3) run through the middle part and the external intercommunication of cylindricality piece (15), hand wheel (16) are installed in the outside of cylindricality piece (15).

3. A low decibel muffler as defined in claim 1 wherein: shrouding (17) are installed to the one end that intake pipe (2) are in the inside of cylindricality barrel (1), a plurality of first air guide hole (18) have been seted up to the lateral wall that intake pipe (2) are in the inside of cylindricality barrel (1), flange (19) are all installed to the tip of blast pipe (3) and intake pipe (2), branch pipe (20) are installed to the lateral part of blast pipe (3), relief valve (21) are installed to the tip of branch pipe (20).

4. A low decibel muffler as defined in claim 1 wherein: toper piece (6) and connecting block (7) structure as an organic whole, be provided with between toper piece (6) and first side cap (4) sealing washer (22), the side view cross-section of connecting block (7) is regular hexagon and sets up.

5. A low decibel muffler as defined in claim 1 wherein: a plurality of second air guide holes (23) are seted up to the even equidistance in middle part of syllable-dividing dish (9), the periphery lateral wall of syllable-dividing dish (9) is clearance fit with the inner wall of cylindricality barrel (1), the central line of syllable-dividing dish (9) and the coaxial setting of central line of main hush pipe (8), the lateral part of syllable-dividing dish (9) is seted up with main hush pipe (8) complex mounting groove (24).

6. A low decibel muffler as defined in claim 1 wherein: the side wall of the main silencing pipe (8) and the side wall of the branch silencing pipe (10) are both provided with a plurality of third air guide holes (25), and the diameter of the main silencing pipe (8) is 1cm-2cm larger than that of the branch silencing pipe (10).

7. A low decibel muffler as defined in claim 1 wherein: the center parts of the sintered polypropylene sleeve (11) and the four groups of sintered polypropylene linings (12) are provided with frameworks (26), the outer wall annular array of the sintered polypropylene sleeve (11) is provided with four groups of connecting grooves (27) matched with the branch silencing tubes (10), the outer wall annular array of the sintered polypropylene sleeve (11) is provided with four groups of sliding grooves (28), the inner wall of the sintered polypropylene lining (12) is provided with four groups of sliding parts (29), the four groups of sliding parts (29) are all slidably inserted in the four groups of inner sides of the sliding grooves (28), and the side-looking cross sections of the sliding parts (29) are all arranged in a convex shape.

8. A low decibel muffler as defined in claim 2 wherein: the middle part of hand wheel (16) is installed shelves pole (30), the outside cover of hand wheel (16) is equipped with rubber sleeve (31).