CN105909342A - Silencing equipment for internal combustion engine exhaust pipe - Google Patents

Abstract

The invention discloses a silencing device for an exhaust pipe of an internal combustion engine, which comprises a silencing pipe, an intake pipe is arranged on one side of the silencing pipe, a cavity is opened inside the silencing pipe, and a first bronchus is respectively arranged inside the cavity and the second bronchus, one end of the first bronchus and the second bronchus are all fixedly connected with a ventilation tube, and one end of the ventilation tube is fixedly connected with a sound-absorbing board, and the sound-absorbing board includes a left partition, a first noise-absorbing cotton and a right partition, and the sound-absorbing board One side is provided with a first curved filter plate, one side of the first curved filter plate is provided with a second filter plate, and the top and bottom of the cavity are provided with a second sound-absorbing cotton, and one side of the second sound-absorbing cotton is fixed It is connected with a sound insulation board, and the other side of the noise reduction pipe is provided with a cover plate. The silencing device used for the exhaust pipe of an internal combustion engine can achieve a good silencing effect, reduce the noise generated during exhaust, and can also prolong the service life of the exhaust pipe while avoiding noise pollution.

Description

A noise reduction device for an exhaust pipe of an internal combustion engine

technical field

The invention relates to the technical field of internal combustion engines, in particular to a noise reduction device for exhaust pipes of internal combustion engines.

Background technique

The internal combustion engine is a kind of power machinery. It is a heat engine that directly converts the heat energy released by the fuel into the power by burning the fuel inside the machine. Noise, prolonging the life of the exhaust muffler system, the main material of the exhaust pipe is stainless steel, but the general exhaust pipe muffler effect is not good, not only causes a lot of noise, but also affects the service life of the exhaust pipe.

Contents of the invention

The object of the present invention is to provide a sound dampening device for the exhaust pipe of an internal combustion engine, so as to solve the problems raised in the background art above.

In order to achieve the above object, the present invention provides the following technical solutions: a noise reduction device for the exhaust pipe of an internal combustion engine, comprising a noise reduction pipe, an air intake pipe is arranged on one side of the noise reduction pipe, and a cavity is opened inside the noise reduction pipe , and the inside of the cavity is respectively provided with a first bronchus and a second bronchus, one end of the first bronchus and the second bronchus is fixedly connected with a ventilation tube, and one end of the ventilation tube is fixedly connected with a sound-absorbing plate, the sound-absorbing The plate includes a left partition, a first sound-absorbing cotton and a right partition, one side of the sound-absorbing plate is provided with a first arc-shaped filter plate, one side of the first arc-shaped filter plate is provided with a second filter plate, and Both the top and the bottom of the cavity are provided with second sound-absorbing cotton, one side of the second sound-absorbing cotton is fixedly connected with a sound insulation board, the other side of the sound-absorbing pipe is provided with a cover plate, and one side of the cover plate is provided with There are exhaust pipes.

Preferably, the shapes of the first bronchus and the second bronchus are spoon-shaped, and the upper side of the first bronchus is in contact with the second sound-absorbing cotton and the lower part of the second bronchus is in contact with the second sound-absorbing cotton. ventilation holes.

Preferably, a steel plate is arranged inside the sound insulation board, a fiberboard is fixedly connected to one side of the steel plate, and a peak sound-absorbing sponge is fixedly connected to one side of the fiberboard.

Preferably, uniformly arranged first air outlet holes are opened on the left partition and the right partition board, and evenly arranged second air outlet holes are opened on the first curved filter plate and the second filter plate.

Compared with the prior art, the beneficial effects of the present invention are: the noise reduction equipment used for the exhaust pipe of an internal combustion engine, the first bronchus, the second bronchus, the noise reduction plate, and the first curved filter plate that are provided with the inside of the noise reduction pipe , the second filter plate, the sound insulation board, the second noise-absorbing cotton and other devices can achieve a good noise reduction effect and reduce the noise generated during exhaust. While avoiding noise pollution, it can also prolong the exhaust time. The effect of tube service life.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the sound insulation board of the present invention;

Fig. 3 is a schematic diagram of the internal structure of the sound-absorbing panel of the present invention.

In the figure: 1 air intake pipe, 2 first bronchus, 3 drop silencer cotton, 4 silencer pipe, 5 vent pipe, 6 first curved filter plate, 7 second filter plate, 8 cover plate, 9 exhaust pipe, 10 silencer Board, 11 sound insulation panels, 12 second bronchus, 13 steel plates, 14 fiberboards, 15 crest sound-absorbing sponges, 16 left partitions, 17 first sound-absorbing cotton, 18 right partitions.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1-3, the present invention provides a kind of technical scheme: a kind of silencer equipment for the exhaust pipe of internal combustion engine, comprise silencer pipe 4, one side of silencer pipe 4 is provided with intake pipe 1, the inside of silencer pipe 4 is opened There is a cavity, and the inside of the cavity is respectively provided with a first bronchus 2 and a second bronchus 12, which divides the gas entering the muffler tube 4, reduces gas collisions, and reduces noise. The shape is spoon-shaped, and the upper side of the first bronchus 2 is in contact with the second sound-absorbing cotton 3 and the lower part of the second bronchus 12 is in contact with the second sound-absorbing cotton 3. Ventilation holes are opened, and the noise generated by the gas will pass through. The ventilation hole is passed to the second noise-absorbing cotton 3, and the second noise-absorbing cotton 3 can play a good effect of absorbing noise. One end of the first bronchus 2 and the second bronchus 12 are fixedly connected with a vent tube 5, and one end of the vent tube 5 Fixedly connected with a sound-absorbing plate 10, the sound-absorbing plate 10 includes a left partition 16, a first sound-absorbing cotton 17 and a right partition 18, and the left partition 16 and the right partition 18 are provided with uniformly arranged first air outlet holes, and the noise passes through After the absorption of the first noise-absorbing cotton 17, it is passed out through the first air outlet. One side of the noise-absorbing plate 10 is provided with a first arc-shaped filter plate 6, and one side of the first arc-shaped filter plate 6 is provided with a second filter plate 7. The first arc-shaped filter plate 6 and the second filter plate 7 absorb the noise in turn, and the first arc-shaped filter plate 6 and the second filter plate 7 are provided with evenly arranged second air outlet holes, and the top of the cavity and the The bottom is provided with the second sound-absorbing cotton 3, and one side of the second sound-absorbing cotton 3 is fixedly connected with the sound insulation board 11, and the interior of the sound insulation board 11 is provided with the steel plate 13, and one side of the steel plate 13 is fixedly connected with the fiberboard 14, and one side of the fiberboard 14 The side is fixedly connected with a wave crest sound-absorbing sponge 15, while absorbing and weakening the noise, it can better prevent the noise from being transmitted to the outside world through the silencer pipe 4. The other side of the silencer pipe 4 is provided with a cover plate 8, one part of the cover plate 8 An exhaust pipe 9 is provided on the side.

Working principle: When in use, the muffler pipe 4 is connected to the exhaust pipe of the internal combustion engine through the intake pipe 1, and the gas passes through the first bronchus 2, the second bronchus 12 and the vent pipe 5 in sequence, and then passes to the muffler plate 10 and the second muffler cotton 3. The filter plate and other devices can absorb the noise for many times, which can reduce the noise very well.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (4)

1. A silencing device for an exhaust pipe of an internal combustion engine, comprising a silencing pipe (4), characterized in that: one side of the silencing pipe (4) is provided with an intake pipe (1), and the silencing pipe (4) A cavity is opened inside the cavity, and a first bronchus (2) and a second bronchus (12) are respectively arranged inside the cavity, and one end of the first bronchus (2) and the second bronchus (12) are fixedly connected with A vent pipe (5), one end of the vent pipe (5) is fixedly connected with a sound-absorbing plate (10), and the sound-absorbing plate (10) includes a left partition (16), a first sound-absorbing cotton (17) and a right partition (18), a first arc-shaped filter plate (6) is provided on one side of the sound-absorbing plate (10), and a second filter plate (7) is provided on one side of the first arc-shaped filter plate (6), And the top and bottom of the cavity are provided with a second sound-absorbing cotton (3), one side of the second sound-absorbing cotton (3) is fixedly connected with a sound insulation board (11), and the other side of the sound-absorbing pipe (4) A cover plate (8) is provided, and an exhaust pipe (9) is provided on one side of the cover plate (8). 2. A noise reduction device for an internal combustion engine exhaust pipe according to claim 1, characterized in that: the first bronchus (2) and the second bronchus (12) are spoon-shaped, and the first Ventilation holes are provided on the upper side of the bronchus (2) in contact with the second silencing cotton (3) and the lower side of the second bronchus (12) in contact with the second silencing cotton (3). 3. A noise reduction device for an internal combustion engine exhaust pipe according to claim 1, characterized in that: a steel plate (13) is arranged inside the sound insulation board (11), and one side of the steel plate (13) A fiberboard (14) is fixedly connected, and a peak sound-absorbing sponge (15) is fixedly connected to one side of the fiberboard (14). 4. A noise reduction device for an exhaust pipe of an internal combustion engine according to claim 1, characterized in that: the left partition (16) and the right partition (18) are provided with evenly arranged first outlets. Air holes, the first curved filter plate (6) and the second filter plate (7) are provided with evenly arranged second air outlet holes.