CN211116191U

CN211116191U - Silencer

Info

Publication number: CN211116191U
Application number: CN201922312799.9U
Authority: CN
Inventors: 马付兵
Original assignee: Xiangyan Chu'an Science & Technology Industrial Co ltd
Current assignee: Xiangyan Chu'an Science & Technology Industrial Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-07-28
Anticipated expiration: 2029-12-20

Abstract

A silencer comprises a cylindrical shell, a first end cover, a second end cover, a first partition plate, a second partition plate, a third partition plate, a first silencing pipe and a second silencing pipe, wherein the first end cover and the second end cover are arranged at two ends of the shell; the first partition plate, the second partition plate and the third partition plate are arranged in parallel to divide the shell into a first chamber, a second chamber, a third chamber and a fourth chamber from left to right; mounting holes for mounting the silencing tubes are formed in the first partition plate, the second partition plate and the third partition plate, annular bulges I are arranged on one sides of the mounting holes of the first partition plate, the second partition plate and the third partition plate, the inner diameters of the bulges are matched with the silencing tubes, and two annular bulges II for clamping the annular bulges I are arranged at the joints of the silencing tubes and the corresponding partition plates; the first silencing pipe and the second silencing pipe are both arranged on the central axis of the shell; can improve the efficiency, reduce the labor cost, reduce the pollution and have environmental protection.

Description

Silencer

Technical Field

The utility model relates to a silencer.

Background

A muffler (muffler) is a device that allows airflow to pass through but prevents or reduces sound transmission, and is an important measure for eliminating aerodynamic noise. The muffler can block the propagation of sound waves and allow air flow to pass through, and is an effective tool for controlling noise. A muffler may therefore be installed behind the exhaust pipe connected to the engine for reducing engine exhaust noise.

However, the connection between the muffler pipe and the partition plate in the existing muffler is fixed by adopting a CO2 gas shielded welding method, which brings pollution on one hand and has low production efficiency on the other hand.

SUMMERY OF THE UTILITY MODEL

The invention aims to overcome the defects of the prior art, thereby providing a silencer which can improve the efficiency, reduce the labor cost, reduce the pollution and have environmental protection.

The technical scheme of the utility model is that: a silencer comprises a cylindrical shell, a first end cover, a second end cover, a first partition plate, a second partition plate, a third partition plate, a first silencing pipe and a second silencing pipe, wherein the first end cover and the second end cover are arranged at two ends of the shell;

the first partition plate, the second partition plate and the third partition plate are arranged in parallel to divide the shell into a first cavity, a second cavity, a third cavity and a fourth cavity from left to right, wherein the length of the third cavity is greater than that of the second cavity, the length of the second cavity is greater than that of the first cavity, and the length of the first cavity is greater than that of the fourth cavity; mounting holes for mounting the silencing tubes are formed in the first partition plate, the second partition plate and the third partition plate, annular bulges I are arranged on one sides of the mounting holes of the first partition plate, the second partition plate and the third partition plate, the inner diameters of the bulges are matched with the silencing tubes, and two annular bulges II for clamping the annular bulges I are arranged at the joints of the silencing tubes and the corresponding partition plates;

the first silencing pipe is inserted in the first partition plate and the second partition plate and penetrates through the first cavity, the second cavity and the third cavity; the silencing pipe II is inserted in the partition plate III and penetrates through the cavity III and the cavity IV; the first silencing pipe and the second silencing pipe are both arranged on the central axis of the shell.

The first silencing pipe and the second silencing pipe are both perforated pipes, and the diameters of the first silencing pipe and the second silencing pipe are the same.

And two groups of through hole groups with different through hole diameters are arranged on the pipe walls of the first silencing pipe and the second silencing pipe.

One group of through hole groups on the pipe wall of the first muffling pipe are positioned in the first chamber, the other group of through hole groups are positioned in the second chamber, and the aperture of the through holes of the through hole group positioned in the first chamber is smaller than that of the through holes of the through hole group positioned in the second chamber.

One group of through hole groups on the pipe wall of the silencing pipe II is positioned in the cavity III, the other group of through hole groups is positioned in the cavity IV, and the aperture of the through hole group positioned in the cavity III is larger than that of the through hole group positioned in the cavity IV.

The air inlet pipe and the exhaust pipe are respectively arranged on the central axis of the first end cover and the central axis of the second end cover.

The air inlet pipe, the exhaust pipe and the muffler pipe are all cylindrical metal pipes.

The connection between the internal silencing pipe and the partition plate of the utility model is fixed by the hydraulic pipe expanding way, which not only can improve the efficiency and reduce the labor cost, but also can reduce the pollution and has environmental protection; because the interior of the silencer is not welded, no foreign matter is ensured to be in the silencer, and abnormal sound is not generated; the shell, the end cover and the partition plate form a four-cavity structure, and the noise reduction effect is obvious.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a partially enlarged schematic view of fig. 1.

Detailed Description

The invention is further described with reference to the following figures and examples.

In fig. 1 and 2, a shell 3, a first end cover 2, a second end cover 9 and three partition plates form a four-cavity structure of a first cavity, a second cavity, a third cavity and a fourth cavity, so that the noise reduction effect is obvious, the length of the third cavity is greater than that of the second cavity, the length of the second cavity is greater than that of the first cavity, and the length of the first cavity is greater than that of the fourth cavity; the air inlet pipe 1, the two muffling pipes and the exhaust pipe 10 form an exhaust channel; the air inlet pipe 1 is axially inserted on the central axis of the first end cover 2, and the air outlet pipe 10 is axially inserted on the central axis of the second end cover 9; the three partition plates are provided with mounting holes for mounting the silencing pipes, one side of each mounting hole of the three partition plates is provided with a first annular protrusion, the inner diameter of each protrusion is matched with the silencing pipe, and the joint of each silencing pipe and the corresponding partition plate is provided with a second annular protrusion for clamping the first annular protrusion in a hydraulic pipe expansion mode; the first muffling pipe 5 is inserted in the first partition plate 4 and the second partition plate 6 and penetrates through the first chamber, the second chamber and the third chamber; the second muffler pipe 7 is inserted on the third partition plate 8 and penetrates through the third cavity and the fourth cavity; the first muffler pipe 5 and the second muffler pipe 7 are both arranged on the central axis of the shell 3; the pipe walls of the first silencing pipe 5 and the second silencing pipe 7 are provided with two groups of through holes with different diameters; one group of through hole groups on the pipe wall of the first muffling pipe 5 are positioned in the first chamber, the other group of through hole groups are positioned in the second chamber, and the aperture of the through holes of the through hole group positioned in the first chamber is smaller than that of the through holes of the through hole group positioned in the second chamber; one group of through hole groups on the pipe wall of the second muffling pipe 7 are positioned in the third chamber, the other group of through hole groups are positioned in the fourth chamber, and the aperture of the through holes of the through hole group positioned in the third chamber is larger than that of the through holes of the through hole group positioned in the fourth chamber; the air inlet pipe 1, the exhaust pipe 10 and the muffler pipe are all cylindrical metal pipes.

Claims

1. A muffler is characterized in that: the silencer comprises a cylindrical shell (3), a first end cover (2) and a second end cover (9) which are arranged at two ends of the shell (3), a first partition plate (4), a second partition plate (6), a third partition plate (8), a first silencing pipe (5) and a second silencing pipe (7) which are arranged in the shell (3), and an air inlet pipe (1) and an air outlet pipe (10) which are respectively arranged on the first end cover (2) and the second end cover (9) along the axial direction, wherein the air inlet pipe (1), the first silencing pipe (5), the second silencing pipe (7) and the air outlet pipe (10) form an air outlet channel;

the first partition plate (4), the second partition plate (6) and the third partition plate (8) are arranged in parallel to divide the shell (3) from left to right into a first chamber, a second chamber, a third chamber and a fourth chamber, the length of the third chamber is greater than that of the second chamber, the length of the second chamber is greater than that of the first chamber, and the length of the first chamber is greater than that of the fourth chamber; mounting holes for mounting the silencing tubes are formed in the first partition plate (4), the second partition plate (6) and the third partition plate (8), annular bulges I are arranged on one sides of the mounting holes of the first partition plate (4), the second partition plate (6) and the third partition plate (8), the inner diameters of the annular bulges I are matched with the silencing tubes, and two annular bulges II for clamping the annular bulges I are arranged at the joints of the silencing tubes and the corresponding partition plates;

the first muffling pipe (5) is inserted into the first partition plate (4) and the second partition plate (6) and penetrates through the first chamber, the second chamber and the third chamber; the second muffler pipe (7) is inserted on the third partition plate (8) and penetrates through the third chamber and the fourth chamber; the first silencing pipe (5) and the second silencing pipe (7) are both arranged on the central axis of the shell (3).

2. The muffler of claim 1 wherein: the first silencing pipe (5) and the second silencing pipe (7) are both perforated pipes, and the pipe diameters of the first silencing pipe (5) and the second silencing pipe (7) are the same.

3. A muffler as claimed in claim 2, wherein: and two groups of through hole groups with different through hole diameters are arranged on the pipe walls of the first silencing pipe (5) and the second silencing pipe (7).

4. A muffler as claimed in claim 3, wherein: one group of through holes on the pipe wall of the first muffling pipe (5) is positioned in the first chamber, the other group of through holes is positioned in the second chamber, and the aperture of the through holes of the through hole group positioned in the first chamber is smaller than that of the through holes of the through hole group positioned in the second chamber.

5. A muffler as claimed in claim 3, wherein: and one group of through hole groups on the pipe wall of the second muffling pipe (7) is positioned in the third chamber, the other group of through hole groups is positioned in the fourth chamber, and the aperture of the through holes of the through hole group positioned in the third chamber is larger than that of the through hole group positioned in the fourth chamber.

6. The muffler of claim 1 wherein: the air inlet pipe (1) and the air outlet pipe (10) are respectively arranged on the central axis of the first end cover (2) and the second end cover (9).

7. The muffler of claim 1 wherein: the air inlet pipe (1), the exhaust pipe (10) and the silencing pipe are all cylindrical metal pipes.