Silencer with built-in silencing bag

Abstract

The utility model provides a silencer with a built-in silencing bag. The silencer with the built-in silencing bag comprises a first shell, a first air inlet pipe, a first silencing pipe, a second shell and an exhaust pipe. A first cavity and a second cavity are formed in the first shell, and the first air inlet pipe is installed on the first shell and communicates with the first cavity. The first silencing pipe communicates with the first cavity and the second cavity, and a plurality of first silencing holes are formed in the pipe wall of the first silencing pipe. The second shell is arranged in the second cavity, a plurality of second silencing holes are formed in the shell wall of the second shell, and the inner cavity of the second shell communicates with the second cavity through the second silencing holes. The exhaust pipe is installed on the first shell and communicated with the second shell, and an exhaust port of the exhaust pipe is located outside the first shell. The second shell is designed in the first shell, so that the silencing and noise reduction effect on waste gas flow can be ensured on the premise that the size of the silencer is not increased. Meanwhile, the second shell is arranged inside, extra space is not occupied, and the overall structure is more compact and attractive.

Description

Technical Field

[0001] This utility model relates to the field of muffler technology, specifically to a muffler with a built-in silencing package. Background Technology

[0002] For conventional variable frequency generator sets, if an additional silencing package is to be added to the muffler, it is usually attached externally to the muffler housing. While this type of muffler can improve noise reduction, it increases the overall size and occupies additional space. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a muffler with a built-in muffler, which makes the overall structure more compact by incorporating the muffler.

[0004] To achieve the above objectives, this utility model provides a muffler with a built-in muffler housing, comprising a first housing having a first cavity and a second cavity; a first air intake pipe disposed on the first housing and communicating with the first cavity; a first muffler pipe communicating with the first cavity and the second cavity respectively, the first muffler pipe having a plurality of first muffler holes; a second housing disposed in the second cavity, the second housing having a plurality of second muffler holes, the inner cavity of the second housing communicating with the second cavity through the second muffler holes; and an exhaust pipe disposed on the first housing and communicating with the second housing.

[0005] Preferably, the first housing is provided with a second silencer pipe and a third cavity, the second silencer pipe is connected to the third cavity and the second cavity respectively, and the second silencer pipe is provided with a plurality of third silencer holes; it also includes a second air inlet pipe, the second air inlet pipe is provided on the first housing and is connected to the third cavity.

[0006] Preferably, the second cavity is located between the first cavity and the third cavity.

[0007] Preferably, the first housing is provided with a first partition and a second partition, which divide the inner cavity of the first housing into a first cavity, a second cavity and a third cavity; the first silencer tube passes through the first partition and the second silencer tube passes through the second partition.

[0008] Preferably, the two ends of the second housing are connected to the first partition and the second partition, respectively.

[0009] Preferably, the two ends of the second housing are open, and the first partition and the second partition respectively block the two ports of the second housing.

[0010] Preferably, the two ends of the first muffler are each provided with a first plug, and the two ends of the second muffler are each provided with a second plug.

[0011] Preferably, the exhaust pipe is provided with a plurality of fourth muffler holes, which are located inside the second housing.

[0012] Preferably, the port of the exhaust pipe located inside the second housing is provided with a third plug.

[0013] Preferably, a spark extinguisher is provided in the port of the exhaust pipe away from the third plug.

[0014] The beneficial effects of this utility model are:

[0015] This utility model discloses a muffler with a built-in silencing housing. By designing the second housing inside the first housing, it ensures effective noise reduction of exhaust gas flow without increasing the size of the muffler. Furthermore, by internalizing the second housing, it does not occupy additional space, resulting in a more compact and aesthetically pleasing overall structure. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 A schematic diagram of the internal structure of a muffler with a built-in silencing package provided in an embodiment of the present utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the muffler;

[0019] Figure 3 A schematic diagram showing the structure after the first shell is hidden;

[0020] Figure label:

[0021] 10. First housing; 11. First cavity; 12. Second cavity; 13. Third cavity; 14. First partition; 15. Second partition; 20. First intake pipe; 30. First muffler; 31. First muffler hole; 32. First plug; 40. Second housing; 41. Second muffler hole; 50. Exhaust pipe; 51. Fourth muffler hole; 52. Third plug; 60. Second muffler; 61. Third muffler hole; 62. Second plug; 70. Second intake pipe; 80. Spark extinguisher. Detailed Implementation

[0022] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0023] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0024] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] like Figure 1-3As shown, in one embodiment of this utility model, a muffler with a built-in muffler is provided, including a first housing 10, a first air intake pipe 20, a first muffler pipe 30, a second housing 40, and an exhaust pipe 50. The first housing 10 has a first cavity 11 and a second cavity 12. The first air intake pipe 20 is mounted on the first housing 10 and communicates with the first cavity 11. The first muffler pipe 30 communicates with both the first cavity 11 and the second cavity 12, and its wall has a plurality of first muffler holes 31. The second housing 40 is disposed within the second cavity 12, and its wall has a plurality of second muffler holes 41. The inner cavity of the second housing 40 communicates with the second cavity 12 through the second muffler holes 41. The exhaust pipe 50 is mounted on the first housing 10 and communicates with the second housing 40, with its exhaust port located outside the first housing 10.

[0029] When the muffler is working, the exhaust gas from the internal combustion engine enters the first chamber 11 through the first intake pipe 20. The noise collides with the walls of the first chamber 11 and cancels out due to friction, ultimately reducing some of the noise. The airflow in the first chamber 11 can only enter the second chamber 12 through the first muffler pipe 30. As the airflow passes through the first muffler hole 31, it generates intense resonance, causing some of the noise to cancel out. This weakens the noise of the airflow entering the second chamber 12.

[0030] Similarly, after the airflow enters the second chamber 12, the noise collides with the cavity wall of the second chamber 12 and cancels out due to friction, ultimately reducing some of the noise. The airflow in the second chamber 12 can only enter the inner cavity of the second housing 40 through the second silencer hole 41 on the second housing 40. During the process of the airflow passing through the second silencer hole 41, a violent resonance is generated, which weakens the airflow noise entering the inner cavity of the second housing 40. Finally, the airflow in the second housing 40 is discharged from the first housing 10 through the exhaust pipe 50.

[0031] This embodiment discloses a muffler with a built-in silencing housing. By designing the second housing 40 inside the first housing 10, it ensures effective noise reduction of exhaust gas flow without increasing the volume of the muffler. Furthermore, by internalizing the second housing 40, it does not occupy additional space, resulting in a more compact and aesthetically pleasing overall structure.

[0032] In one embodiment, the first housing 10 is provided with a second silencer pipe 60 and a third cavity 13. The second silencer pipe 60 is connected to the third cavity 13 and the second cavity 12 respectively. The pipe wall of the second silencer pipe 60 is provided with a plurality of third silencer holes 61. The silencer also includes a second air inlet pipe 70, which is installed on the first housing 10 and communicates with the third cavity 13.

[0033] The exhaust gas from the internal combustion engine also enters the third chamber 13 through the second intake pipe 70, and then enters the second chamber 12 through the second muffler pipe 60. This structural design allows the muffler to be used in twin-cylinder engines, thus expanding its applicability.

[0034] Furthermore, the second cavity 12 is located between the first cavity 11 and the third cavity 13. The first housing 10 contains a first partition 14 and a second partition 15, both of which are fixed within the first housing 10 by welding. The first partition 14 and the second partition 15 divide the inner cavity of the first housing 10 into the first cavity 11, the second cavity 12, and the third cavity 13. The first partition 14 is located between the first cavity 11 and the second cavity 12, and the second partition 15 is located between the second cavity 12 and the third cavity 13. A first silencing pipe 30 is fixedly inserted through the first partition 14, and a second silencing pipe 60 is fixedly inserted through the second partition 15.

[0035] By designing the second chamber 12 between the first chamber 11 and the third chamber 13, the flow path of the exhaust gas can be extended as much as possible, improving the cooling effect on the airflow and extending the propagation path of the noise, so that the noise gradually weakens during the propagation process, thereby achieving the purpose of noise reduction.

[0036] In one embodiment, the two ends of the second housing 40 are fixedly connected to the first partition 14 and the second partition 15, respectively. This structural design allows the first partition 14 and the second partition 15 to provide stable support for the second housing 40, thus eliminating the need for additional support members to support the second housing 40. This reduces the weight of the muffler, reduces the amount of material used, and consequently lowers the manufacturing cost.

[0037] Furthermore, the two ends of the second housing 40 are open, and the first partition 14 and the second partition 15 respectively seal the two ports of the second housing 40. By using the first partition 14 and the second partition 15 to seal the two ports of the second housing 40 respectively, there is no need to design end caps on the second housing 40, thereby further reducing the use of materials.

[0038] In one embodiment, the two ends of the first silencer pipe 30 are respectively provided with a first plug 32, and the two ends of the second silencer pipe 60 are respectively provided with a second plug 62. By blocking the two ends of the first silencer pipe 30 and the two ends of the second silencer pipe 60, the exhaust gas flow can only enter the second cavity 12 through the first silencer hole 31 and the third silencer hole 61, thereby improving the noise reduction effect of the airflow and further extending the flow path of the airflow.

[0039] In one embodiment, in order to further improve the noise reduction effect, the exhaust pipe 50 is provided with a plurality of fourth noise reduction holes 51, the fourth noise reduction holes 51 are located inside the second housing 40, and the port of the exhaust pipe 50 located inside the second housing 40 is provided with a third plug 52.

[0040] In one embodiment, in order to disperse sparks in the airflow and ensure safety, a spark extinguisher 80 is provided in the port of the exhaust pipe 50 away from the third plug 52.

[0041] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A muffler with a built-in sound-absorbing package, characterized in that, include: The first housing (10) is provided with a first cavity (11) and a second cavity (12); The first air intake pipe (20) is provided on the first housing (10) and communicates with the first cavity (11); The first silencer tube (30) is connected to the first cavity (11) and the second cavity (12) respectively, and the first silencer tube (30) is provided with a plurality of first silencer holes (31); A second housing (40) is disposed within the second cavity (12). The second housing (40) is provided with a plurality of second silencing holes (41). The inner cavity of the second housing (40) is connected to the second cavity (12) through the second silencing holes (41). An exhaust pipe (50) is provided on the first housing (10) and communicates with the second housing (40).

2. The muffler with a built-in silencing package according to claim 1, characterized in that, The first housing (10) is provided with a second silencer pipe (60) and a third cavity (13). The second silencer pipe (60) is connected to the third cavity (13) and the second cavity (12) respectively. The second silencer pipe (60) is provided with a plurality of third silencer holes (61). It also includes a second air intake pipe (70), which is disposed on the first housing (10) and communicates with the third cavity (13).

3. The muffler with a built-in silencing package according to claim 2, characterized in that, The second cavity (12) is located between the first cavity (11) and the third cavity (13).

4. The muffler with a built-in silencing package according to claim 3, characterized in that, The first housing (10) is provided with a first partition (14) and a second partition (15), which divide the inner cavity of the first housing (10) into the first cavity (11), the second cavity (12) and the third cavity (13); The first silencer pipe (30) passes through the first partition (14), and the second silencer pipe (60) passes through the second partition (15).

5. The muffler with a built-in silencing package according to claim 4, characterized in that, The two ends of the second housing (40) are connected to the first partition (14) and the second partition (15) respectively.

6. The muffler with a built-in silencing package according to claim 5, characterized in that, The two ends of the second housing (40) are open, and the first partition (14) and the second partition (15) respectively block the two ports of the second housing (40).

7. The muffler with a built-in silencing package according to any one of claims 2-6, characterized in that, The first silencer pipe (30) has a first plug (32) at each of its two ends, and the second silencer pipe (60) has a second plug (62) at each of its two ends.

8. The muffler with a built-in silencing package according to any one of claims 1-6, characterized in that, The exhaust pipe (50) is provided with a plurality of fourth silencer holes (51), which are located inside the second housing (40).

9. The muffler with a built-in silencing package according to claim 8, characterized in that, The exhaust pipe (50) located inside the second housing (40) has a third plug (52).

10. The muffler with a built-in silencing package according to claim 9, characterized in that, A spark extinguisher (80) is provided in the port of the exhaust pipe (50) away from the third plug (52).

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