CN215890156U - Low-noise exhaust pipe - Google Patents

Abstract

The utility model relates to the technical field of vehicle exhaust pipes, in particular to a low-noise exhaust pipe which comprises an air inlet pipeline; the first exhaust pipeline is arranged behind the air inlet pipeline and is connected with the air inlet pipeline; a second exhaust conduit; the silencing mechanism comprises a first silencer; a second muffler; a third silencer; a first valve. This application gets into tail gas through admission line, rethread first muffler can carry out first section amortization to gas and handle, later tail gas can transmit to first exhaust duct and second exhaust duct, first valve on the second exhaust duct can be in the closed condition when the exhaust is pressed lower, tail gas can carry out the secondary amortization back through the second muffler on the first exhaust duct, discharge from the second exhaust duct, when the exhaust is pressed when too high, can open first valve, make gas can carry out the emission after the secondary amortization through second muffler and third muffler respectively, how to carry out the technical problem of amortization in the exhaust process has been solved.

Description

Low-noise exhaust pipe

Technical Field

The utility model relates to a vehicle vent-pipe technical field specifically relates to a blast pipe of low noise.

Background

In recent years, automobiles are gradually developed to low energy consumption and low noise, noise of an exhaust system is one of main noise sources of automobile noise, and the noise of the exhaust system is reduced by arranging a silencer in the exhaust system, but the introduction of the silencer increases exhaust pressure to influence engine operation.

In the existing exhaust pipe, such as the exhaust pipe assembly disclosed in patent No. CN201621436569.3 and the vehicle having the same, the exhaust pipe prevents the exhaust gas from being pressurized during the silencing process, but it can only control the engine to open the valve after a certain rotation speed, but the exhaust gas pressurized before the rotation speed value will also increase gradually along with the rotation speed of the engine, so that the engine operation is affected.

There is a need for a low noise exhaust pipe.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a low-noise exhaust pipe, which is characterized in that an air inlet pipeline is arranged; a first exhaust duct; a second exhaust conduit; the silencing mechanism composed of the first silencer, the second silencer, the third silencer and the first valve achieves the technical problem of how to carry out silencing in the exhaust process.

In order to achieve the above purposes, the technical scheme adopted by the utility model is as follows:

a low-noise exhaust pipe comprises a pipe body,

an air intake duct;

the first exhaust pipeline is arranged behind the air inlet pipeline and is connected with the air inlet pipeline;

the second exhaust pipeline is arranged behind the air inlet pipeline and connected with the air inlet pipeline, and the second exhaust pipeline is positioned on one side of the first exhaust pipeline;

a silencing mechanism is arranged among the air inlet pipeline, the first exhaust pipeline and the second exhaust pipeline, the silencing mechanism comprises,

the first silencer is arranged on the air inlet pipeline;

a second muffler disposed on the first exhaust duct;

the third silencer is arranged on the second exhaust pipeline;

and the first valve is arranged on the second exhaust pipeline and is positioned behind the third silencer.

Preferably, the air inlet pipeline, the first exhaust pipeline and the second exhaust pipeline are all composed of an inner pipeline and an outer pipeline, a sound-proof blanket tightly attached to the outer surface of the inner pipeline is arranged between the inner pipeline and the outer pipeline, a plurality of sound-absorbing cotton are arranged on the inner wall of the inner pipeline, and the sound-absorbing cotton are evenly distributed on the inner wall of the inner pipeline.

Preferably, an elastic cushion is further arranged between the inner pipeline and the outer pipeline, and the inner wall and the outer wall of the elastic cushion are respectively connected with the sound insulation blanket and the outer pipeline.

Preferably, a second valve is further arranged at the joint of the air inlet pipeline and the first exhaust pipeline as well as the second exhaust pipeline, a first connecting port, a second connecting port and a third connecting port are arranged on the second valve, a first cavity is arranged in the second valve, and the first cavity is communicated with the first connecting port and the second connecting port; a second cavity communicated with the third connecting port is further arranged on one side of the first cavity; a piston and a piston pin are arranged in the second cavity, a spring is further arranged on the piston pin, and an opening communicated with the second connecting port and the second cavity is further formed in one side of the piston.

Preferably, a communication pipeline is further arranged between the first exhaust pipeline and the second exhaust pipeline, the communication pipeline is located behind the first silencer and the second silencer and in front of the first valve, and two ends of the communication pipeline penetrate through the first exhaust pipeline and the second exhaust pipeline respectively.

Preferably, the top end of the piston is in a circular truncated cone shape, and a clamping groove corresponding to the first cavity is formed in the joint of the first cavity and the second cavity.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, tail gas enters through the gas inlet pipeline, the first section of silencing treatment is carried out on the gas through the first silencer, then the tail gas is transmitted to the first exhaust pipeline and the second exhaust pipeline, when the exhaust pressure is low, the first valve on the second exhaust pipeline is in a closed state, the tail gas is discharged from the second exhaust pipeline after secondary silencing is carried out through the second silencer on the first exhaust pipeline, when the exhaust pressure is too high, the first valve is opened, so that the gas can be discharged after secondary silencing through the second silencer and the third silencer respectively, and the technical problem of how to carry out silencing in the exhaust process is solved.

2. According to the utility model, the sound absorption cotton on the inner pipeline is used for carrying out silencing treatment, and the sound insulation blanket positioned between the inner pipeline and the outer pipeline can effectively prevent noise generated by tail gas from being transmitted to the outside, so that the technical problem of how to increase the silencing effect is solved.

3. According to the utility model, the elastic cushion arranged between the outer pipeline and the inner pipeline provides a space for deformation of the inner pipeline when the inner pipeline is heated to deform, and the elastic cushion can also reduce vibration inside the exhaust pipe in the running process of a vehicle, so that the technical problem that the service life of the pipeline is influenced by overhigh gas temperature or vibration is solved.

4. According to the utility model, tail gas is transmitted into the first cavity through the first connecting port and then transmitted to the second connecting port through the first cavity, when the power of the engine is gradually increased, the air pressure in the exhaust pipe is gradually increased, and the air pressure in the second valve is gradually increased because the silencer can slow down the flow rate of the tail gas to enable the gas to be accumulated in the second valve, when the air pressure is increased to a certain value, the piston can be extruded to enable the spring to deform and further push the piston to slide on the piston pin, so that the second cavity is communicated with the first cavity and transmitted to the third exhaust pipeline from the opening, and the technical problem of how to prevent the exhaust pressure from being increased due to the gradual increase of the power of the engine is solved.

5. The utility model enables the gas of the first exhaust pipeline and the second exhaust pipeline to be communicated through the communicating pipeline connected with the first exhaust pipeline and the second exhaust pipeline, and solves the technical problem of how to enable the gas pressures of the two exhaust pipelines to be the same.

6. According to the utility model, the piston cannot penetrate into the first cavity to influence the transmission efficiency through the clamping groove corresponding to the truncated cone-shaped top end of the piston on the second cavity, and the technical problem that the transmission efficiency of the piston is influenced when the piston is transmitted into the first cavity under the elastic force of the spring is solved.

Drawings

FIG. 1 is a first perspective view of the present invention;

FIG. 2 is a second perspective view of the present invention;

FIG. 3 is a side view of the present invention;

FIG. 4 is a cross-sectional view at section A-A of FIG. 3;

fig. 5 is a partial enlarged view at B of fig. 4;

fig. 6 is a partial enlarged view at C of fig. 4;

the reference numbers in the figures are:

1-an air inlet duct; 1 a-an inner conduit; 1a 1-sound absorbing cotton; 1 b-an outer conduit; 1 c-a sound-insulating blanket; 1 d-an elastic pad;

2-a first exhaust duct;

3-a second exhaust duct;

4-a silencing mechanism; 4 a-a first muffler; 4 b-a second muffler; 4 c-a third silencer; 4 d-a first valve;

5-a second valve; 5 a-a first connection port; 5 b-a second connection port; 5 c-a third connection port; 5 d-first cavity; 5 e-a second cavity; 5e1 — piston; 5e 2-piston pin; 5e 3-spring; 5e4 — opening; 5 f-card slot

6-connecting the pipeline.

Detailed Description

The following description is presented to disclose the utility model so as to enable any person skilled in the art to practice the utility model. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

In order to solve the technical problem of how to perform sound attenuation in the exhaust process, as shown in fig. 1 to 6, the following preferred technical solutions are provided:

a low-noise exhaust pipe comprises a pipe body,

an air intake duct 1;

a first exhaust duct 2 disposed behind the intake duct 1 and connected to the intake duct 1;

a second exhaust duct 3 disposed behind the intake duct 1 and connected to the intake duct 1;

a silencing mechanism 4 is also arranged among the air inlet pipeline 1, the first exhaust pipeline 2 and the second exhaust pipeline 3, the silencing mechanism 4 comprises,

a first muffler 4a provided on the intake duct 1;

a second muffler 4b provided on the first exhaust pipe 2;

a third muffler 4c provided on the second exhaust pipe 3;

and a first valve 4d provided on the second exhaust duct 3 and located behind the third muffler 4 c.

Specifically, it should be noted that the intake pipe 1 is connected to the exhaust port of the engine and the connection part needs to be provided with a three-way catalyst for purifying exhaust gas, the internal structure of the muffler is not shown, when the muffler works, the intake pipe 1 enters the exhaust gas to be exhausted, when the exhaust gas passes through the first muffler 4a, the first muffler 4a performs a first-stage muffling treatment on the gas, then the exhaust gas is transmitted to the first exhaust pipe 2 and the second exhaust pipe 3, when the exhaust gas pressure is low, the first valve 4d on the second exhaust pipe 3 is in a closed state, the exhaust gas is secondarily muffled by the second muffler 4b on the first exhaust pipe 2 and then is exhausted from the second exhaust pipe 3, when the exhaust gas pressure is too high, in order to prevent the gas pressure from being gradually increased to affect the increase of the fuel consumption rate of the engine, the dynamic performance of the engine from being deteriorated and the quality of the exhausted exhaust gas from being increased, the first valve 4d is opened to allow the gas to be secondarily silenced and then discharged through the second silencer 4b and the third silencer 4c, respectively.

Further, in order to solve the technical problem of how to increase the noise reduction effect, as shown in fig. 5, the following preferred technical solutions are provided:

the air inlet pipeline 1, the first exhaust pipeline 2 and the second exhaust pipeline 3 are all composed of an inner pipeline 1a and an outer pipeline 1b, a sound-insulating blanket 1c tightly attached to the outer surface of the inner pipeline 1a is arranged between the inner pipeline 1a and the outer pipeline 1b, a plurality of sound-absorbing cotton 1a1 are arranged on the inner wall of the inner pipeline 1a, and the sound-absorbing cotton 1a1 is uniformly distributed on the inner wall of the inner pipeline 1 a.

Specifically, it should be noted that when the air passes through the air inlet duct 1, the first exhaust duct 2 and the second exhaust duct 3, the sound-absorbing cotton 1a1 located in each inner duct 1a is first subjected to a sound-deadening treatment, and the sound-insulating blanket 1c located between the inner duct 1a and the outer duct 1b can effectively prevent the noise generated by the exhaust gas from being transmitted to the outside.

Further, in order to solve the technical problem that the service life of the pipeline is affected by the overhigh gas temperature or vibration, as shown in fig. 5, the following preferred technical solutions are provided:

an elastic pad 1d is further arranged between the inner pipeline 1a and the outer pipeline 1b, and the inner wall and the outer wall of the elastic pad 1d are respectively connected with the sound insulation blanket 1c and the outer pipeline 1 b.

Specifically, because the exhaust gas can produce a large amount of heats in the exhaust gas discharge process, in order to prevent that the pipeline should influence life for the thermal barrier cold contraction phenomenon, be provided with elastic cushion 1d between outer pipeline 1b and interior pipeline 1a, elastic cushion 1d can let interior pipeline 1a provide the space that is used for the deformation for it when warping to elastic cushion 1d also can reduce the inside vibrations of exhaust pipe in the vehicle driving process.

Further, in order to solve the technical problem of how to prevent the exhaust pressure from increasing due to the gradual increase of the engine power, as shown in fig. 6, the following preferred technical solutions are provided:

a second valve 5 is further arranged at the joint of the air inlet pipeline 1 and the first exhaust pipeline 2 as well as the second exhaust pipeline 3, a first connecting port 5a, a second connecting port 5b and a third connecting port 5c are arranged on the second valve 5, a first cavity 5d is arranged in the second valve 5, and the first cavity 5d is communicated with the first connecting port 5a and the second connecting port 5 b; a second cavity 5e communicated with the third connecting port 5c is also arranged on one side of the first cavity 5 d; the second cavity 5e is internally provided with a piston 5e1 and a piston 5e1 pin, the piston 5e1 pin is also provided with a spring 5e3, and the piston 5e1 side is also provided with an opening 5e4 which is respectively communicated with the second connecting port 5b and the second cavity 5 e.

Specifically, the gas is transmitted to the first cavity 5d through the first connection port 5a, and then transmitted to the second connection port 5b through the first cavity 5d, when the engine power is gradually increased, the gas pressure in the exhaust pipe is gradually increased, and the gas is accumulated in the second valve 5 because the muffler slows down the flow rate of the exhaust gas, so that the gas pressure in the second valve 5 is gradually increased, and when the gas pressure is increased to a certain value, the piston 5e1 is squeezed to deform the spring 5e3 and further push the piston 5e1 to slide on the piston 5e1 pin, so that the second cavity 5e is communicated with the first cavity 5d and then transmitted to the third exhaust pipe from the opening 5e 4.

Further, in order to solve the technical problem of how to make the air pressures of the two exhaust pipes the same, as shown in fig. 1-2, the following preferred technical solutions are provided:

still be provided with communicating pipe 6 between first exhaust duct 2 and the second exhaust duct 3, communicating pipe 6 is located the place ahead of first valve 4d and is located the rear of first muffler 4a and second muffler 4b, and inside first exhaust duct 2 and the second exhaust duct 3 are worn to establish respectively at communicating pipe 6's both ends.

Specifically, it should be noted that the communicating pipe 6 is disposed behind the first muffler 4a and the second muffler 4b and in front of the first valve 4d, so as to make the air pressures at the front ends of the two exhaust pipe mufflers approximately the same and to enable the exhaust gas transmitted from the second exhaust pipe 3 to be muffled, when the first valve 4d is not opened, a part of the exhaust gas is transmitted from the second cavity 5e to the second exhaust pipe 3, muffled by the third muffler 4c, and then transmitted to the first exhaust pipe 2 through the communicating pipe 6; when the first valve 4d is opened, the communication pipe 6 is to make the air pressure in the first exhaust pipe 2 and the second exhaust pipe 3 similar.

Further, in order to solve the technical problem that the piston is transmitted into the first cavity 5d by the elastic force of the spring, which affects the transmission efficiency, as shown in fig. 4 and 6, the following preferred technical solutions are provided:

the top end of the piston 5e1 is in a circular truncated cone shape, and a clamping groove 5f corresponding to the first cavity 5d is arranged at the joint of the second cavity 5 e.

Specifically, the piston 5e1 cannot penetrate into the first cavity 5d through the clamping groove 5f corresponding to the truncated cone-shaped top end of the piston 5e1 on the second cavity 5e, so that the transmission efficiency is not affected.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. A low-noise exhaust pipe comprises a pipe body,

an air intake duct (1);

the first exhaust pipeline (2) is arranged behind the air inlet pipeline (1) and is connected with the air inlet pipeline (1);

the second exhaust pipeline (3) is arranged behind the air inlet pipeline (1) and connected with the air inlet pipeline (1), and the second exhaust pipeline (3) is positioned on one side of the first exhaust pipeline (2);

it is characterized in that a silencing mechanism (4) is arranged among the air inlet pipeline (1), the first exhaust pipeline (2) and the second exhaust pipeline (3), the silencing mechanism (4) comprises,

a first muffler (4a) provided on the intake duct (1);

a second muffler (4b) provided on the first exhaust pipe (2);

a third muffler (4c) provided on the second exhaust duct (3);

and a first valve (4d) which is arranged on the second exhaust pipeline (3) and is positioned behind the third silencer (4 c).

2. A low noise exhaust duct according to claim 1, wherein the air intake duct (1), the first exhaust duct (2) and the second exhaust duct (3) are formed by an inner duct (1a) and an outer duct (1b), a sound-proof blanket (1c) is disposed between the inner duct (1a) and the outer duct (1b) and closely attached to the outer surface of the inner duct (1a), a plurality of sound-absorbing cotton (1a1) are disposed on the inner wall of the inner duct (1a), and the plurality of sound-absorbing cotton (1a1) are uniformly distributed on the inner wall of the inner duct (1 a).

3. A low-noise exhaust duct according to claim 2, wherein an elastic pad (1d) is further provided between the inner duct (1a) and the outer duct (1b), and an inner wall and an outer wall of the elastic pad (1d) are connected to the soundproof blanket (1c) and the outer duct (1b), respectively.

4. The exhaust pipe with low noise according to claim 1, wherein a second valve (5) is further arranged at the joint of the air inlet pipe (1) and the first exhaust pipe (2) and the second exhaust pipe (3), the second valve (5) is provided with a first connecting port (5a), a second connecting port (5b) and a third connecting port (5c), a first cavity (5d) is arranged in the second valve (5), and the first cavity (5d) is communicated with the first connecting port (5a) and the second connecting port (5 b); a second cavity (5e) communicated with the third connecting port (5c) is further arranged on one side of the first cavity (5 d); a piston (5e1) and a piston (5e1) pin are arranged in the second cavity (5e), a spring (5e3) is further arranged on the piston (5e1) pin, and an opening (5e4) which is respectively communicated with the second connecting port (5b) and the second cavity (5e) is further formed in one side of the piston (5e 1).

5. A low-noise exhaust pipe according to claim 4, characterized in that a communication pipe (6) is further arranged between the first exhaust pipe (2) and the second exhaust pipe (3), the communication pipe (6) is located behind the first silencer (4a) and the second silencer (4b) and in front of the first valve (4d), and two ends of the communication pipe (6) are respectively arranged inside the first exhaust pipe (2) and the second exhaust pipe (3) in a penetrating manner.

6. The exhaust pipe with low noise as claimed in claim 4, wherein the top end of the piston (5e1) is truncated cone-shaped, and the joint between the first cavity (5d) and the second cavity (5e) is provided with a corresponding slot (5 f).

Images