CN215486224U

CN215486224U - Spark-extinguishing star silencer for diesel engine

Info

Publication number: CN215486224U
Application number: CN202121590102.5U
Authority: CN
Inventors: 孙克坚
Original assignee: Chongqing Bowo Engine Parts Manufacturing Co ltd
Current assignee: Chongqing Bowo Engine Parts Manufacturing Co ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2022-01-11
Anticipated expiration: 2031-07-13

Abstract

The utility model relates to the technical field of silencers, and discloses a spark-extinguishing silencer for a diesel engine, which comprises a silencer shell, wherein a fireproof net, a first partition plate and a second partition plate are sequentially arranged in the silencer shell along the movement direction of waste gas, the fireproof net, the first partition plate and the second partition plate divide the interior of the silencer shell into a first cavity, a second cavity, a third cavity and a fourth cavity in sequence, an air inlet pipe is arranged on the left side of the silencer shell, an exhaust pipe is arranged on the right side of the silencer shell, a first flow guide pipe and a second flow guide pipe are respectively arranged at the tail end of the air inlet pipe and the starting end of the exhaust pipe, the opening of the first flow guide pipe faces the side wall of the first cavity, an ash accumulation box is arranged on one side, close to the fireproof net, of the bottom of the first cavity, and the ash accumulation box is communicated with the first cavity. The utility model further reduces the noise of the exhaust gases.

Description

Spark-extinguishing star silencer for diesel engine

Technical Field

The utility model relates to the technical field of silencers, in particular to a spark-extinguishing silencer for a diesel engine.

Background

The diesel engine is an engine which burns diesel to obtain energy release, and has the advantages of large torque and good economic performance. The working process of a diesel engine is much the same as that of a gasoline engine, and each working cycle also goes through four strokes of intake, compression, power and exhaust. However, the fuel for diesel engine is diesel oil, which has higher viscosity than gasoline and is not easy to evaporate, and its self-ignition temperature is lower than gasoline, so the formation and ignition mode of combustible mixture are different from that of gasoline engine. The difference is mainly that the mixture in the cylinder of the diesel engine is compression ignited, not ignited. When the diesel engine works, air enters the cylinder, and when the air in the cylinder is compressed to the end point, the temperature can reach 500-700 ℃, and the pressure can reach 40-50 atmospheric pressures. When the piston is close to the top dead center, the fuel nozzle of the fuel supply system sprays fuel to the combustion chamber of the cylinder in a very short time at a very high pressure, the diesel oil forms fine oil particles, the fine oil particles are mixed with high-pressure and high-temperature air, the combustible mixed gas is combusted by itself and expands violently to generate explosive force to push the piston to do work downwards, the temperature can reach 1900-2000 ℃, the pressure can reach 60-100 atmospheric pressures, and the generated torque is very large, so that the diesel engine is widely applied to large-scale diesel equipment. On the current diesel engine, in order to prevent to produce the spark in the blast pipe, produce great noise, prevent simultaneously that the diesel oil in spark and the air from mixing and causing the incident emergence, often need install the star silencer of putting out a fire, the star performance of putting out a fire of current star silencer of putting out a fire is not good, and simultaneously, noise cancelling effect is relatively poor, is unfavorable for the use.

Disclosure of Invention

In view of the above-mentioned deficiencies of the prior art, the present invention provides a spark plug muffler for a diesel engine to solve the above-mentioned problems.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a spark extinguishing silencer for a diesel engine comprises a silencer shell, wherein a fireproof net, a first partition plate and a second partition plate are sequentially arranged in the silencer shell along the movement direction of exhaust gas, the fireproof net, the first partition plate and the second partition plate sequentially divide the interior of the silencer shell into a first cavity, a second cavity, a third cavity and a fourth cavity, an air inlet pipe is arranged on the left side of the silencer shell, the tail end of the air inlet pipe is located in the first cavity, an exhaust pipe is arranged on the right side of the silencer shell and penetrates through the first partition plate and the second partition plate, the starting end of the exhaust pipe is located in the second cavity, a first guide pipe and a second guide pipe are respectively arranged at the tail end of the air inlet pipe and the starting end of the exhaust pipe, the opening of the first guide pipe faces the side wall of the first cavity, an ash accumulation box is arranged at one side of the fireproof net close to the bottom of the first cavity, and the dust box is communicated with the first cavity, through holes (not marked in the figure) which are uniformly distributed are formed in the side wall of the exhaust pipe positioned in the third cavity, and fireproof sound-absorbing cotton (not marked in the figure) is filled in the third cavity.

Among this technical scheme, the intake pipe of silencer is connected with diesel engine, fix the silencer on diesel engine, diesel engine exhaust waste gas passes through in the first cavity of intake pipe, because the opening of first honeycomb duct is towards the lateral wall of first cavity, the exhaust flow flows along the lateral wall of first cavity when flowing from the opening of first honeycomb duct, the collision of the spark part that carries in the exhaust flow and the lateral wall of first cavity is held back, another part spark strikes and is eliminated with the fire prevention net and hold back in the exhaust gas, the exhaust gas flow passes through the second honeycomb duct and enters into in the blast pipe, outside the blast pipe discharge silencer, the cotton noise that can reduce waste gas of sound absorption of fire prevention, the spark that is held back collects in the dust box through the opening, convenient centralized processing.

As optimization, first honeycomb duct and second honeycomb duct all include water conservancy diversion standpipe and water conservancy diversion return bend, just the opening orientation of the water conservancy diversion return bend of second honeycomb duct first baffle.

Therefore, the opening of the second guide pipe faces the first baffle plate, and the direction of the exhaust gas flow flowing out of the first guide pipe and the opening of the second guide pipe are not on the same flow direction plane, so that the speed of the exhaust gas entering the exhaust pipe can be reduced, and the noise is further reduced.

Preferably, a first flange is arranged at the starting end of the air inlet pipe, and a second flange is arranged at the tail end of the exhaust pipe.

Thus, the engine and other equipment are connected through the first flange and the second flange.

Preferably, the silencer shell comprises an outer metal shell, an asbestos heat insulation layer and an inner metal shell in sequence from outside to inside.

Therefore, the asbestos heat insulation layer can reduce heat transfer and avoid scalding of personnel.

Preferably, the number of the fireproof nets is two, and the meshes of the two fireproof nets are arranged in a staggered mode.

In this way, the sparks in the exhaust gas flow can be better impinged upon, and at the same time, the velocity of the exhaust gas flow can be reduced.

Preferably, the fireproof sound-absorbing cotton is rock wool.

Like this, the rock wool layer has thermal-insulated, the effect of sound absorption, and the waste gas stream is further making an uproar, the sound absorption making an uproar at the in-process that passes through the blast pipe, and the waste gas noise decibel of discharge muffler is lower.

The utility model has the beneficial effects that:

1. the opening of the first flow guide pipe faces the side wall of the first cavity, so that the exhaust gas flow flows along the side wall of the first cavity when flowing out of the opening of the first flow guide pipe, one part of sparks carried in the exhaust gas flow collides with the side wall of the first cavity and is intercepted, the other part of sparks in the exhaust gas collides with the fireproof net and is eliminated and intercepted, the exhaust gas flow enters the exhaust pipe through the second flow guide pipe, the exhaust pipe is discharged out of the silencer, the fireproof sound-absorbing cotton can reduce the noise of the exhaust gas, and the intercepted sparks are collected in the dust collecting box through the opening, so that the centralized treatment is facilitated;

2. the fire prevention net is equipped with two and can be better to the spark in the waste gas stream and strike, simultaneously, can reduce the speed of waste gas stream, further reduces the noise of waste gas.

Drawings

FIG. 1 is a schematic structural diagram of a spark muffler for a diesel engine according to the present invention;

fig. 2 is a structural view of the muffler case of fig. 1.

Detailed Description

The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention. The technical solutions in the embodiments of the present invention will be described below in a clear and complete manner with reference to the drawings in the embodiments of the present invention, it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and the following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It is to be understood that the positional terms, such as "front" and "back", are generally based on the positional or orientational relationships shown in the drawings and are used merely to facilitate describing the utility model and to simplify the description, and that, unless otherwise specified, these positional terms do not indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation and are not to be considered limiting of the scope of the utility model.

As shown in fig. 1-2, a spark extinguishing muffler for a diesel engine comprises a muffler shell 1, wherein a fireproof net 2, a first partition plate 3 and a second partition plate 4 are sequentially arranged in the muffler shell 1 along a movement direction of exhaust gas, the fireproof net 2, the first partition plate 3 and the second partition plate 4 sequentially divide the interior of the muffler shell 1 into a first cavity 5, a second cavity 6, a third cavity 7 and a fourth cavity 8, an air inlet pipe 9 is arranged on the left side of the muffler shell 1, the tail end of the air inlet pipe 9 is located in the first cavity 5, an exhaust pipe 10 is arranged on the right side of the muffler shell 1, the exhaust pipe 10 penetrates through the first partition plate 3 and the second partition plate 4, the starting end of the exhaust pipe 10 is located in the second cavity 6, the tail end of the air inlet pipe 9 and the starting end of the exhaust pipe 10 are respectively provided with a first flow guide pipe and a second flow guide pipe, the opening orientation of first honeycomb duct the lateral wall of first cavity 5, the bottom of first cavity 5 is close to one side of fire prevention net 2 is equipped with deposition case 13, just deposition case 13 with first cavity 5 intercommunication is located the lateral wall of the blast pipe of third cavity 7 is equipped with evenly distributed's through-hole (not sign in the figure), just third cavity 7 intussuseption is filled with the fire prevention and inhales the sound cotton (not sign in the figure).

In this embodiment, the first flow guiding pipe and the second flow guiding pipe both include a vertical flow guiding pipe and an elbow flow guiding pipe 14, and an opening of the elbow flow guiding pipe of the second flow guiding pipe faces the first partition plate 3.

In this embodiment, a first flange 11 is disposed at the beginning of the intake pipe 9, and a second flange 12 is disposed at the tail end of the exhaust pipe 10.

In this embodiment, the muffler shell 1 includes an outer metal shell 1a, an asbestos insulation layer 1b, and an inner metal shell 1c in sequence from the outside to the inside.

In this embodiment, the fireproof net 2 is provided with two fireproof nets, and the meshes of the two fireproof nets are arranged in a staggered manner.

In this embodiment, the sound cotton is inhaled in the fire prevention is rock wool.

Finally, it should be noted that: various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. The utility model provides a spark-extinguishing silencer for diesel engine, includes silencer casing (1), its characterized in that, be equipped with fire prevention net (2), first baffle (3) and second baffle (4) in proper order along the waste gas direction of motion in silencer casing (1), fire prevention net (2), first baffle (3) and second baffle (4) will first cavity (5), second cavity (6), third cavity (7) and fourth cavity (8) are separated into in proper order to the inside of silencer casing (1), the left side of silencer casing (1) is equipped with intake pipe (9), just the tail end of intake pipe (9) is located in first cavity (5), the right side of silencer casing (1) is equipped with blast pipe (10), blast pipe (10) run through first baffle (3) and second baffle (4) set up, just the top of blast pipe (10) is located in second cavity (6), the tail end of intake pipe (9) and the top of blast pipe (10) is equipped with first honeycomb duct and second honeycomb duct respectively, the opening orientation of first honeycomb duct the lateral wall of first cavity (5), the bottom of first cavity (5) is close to one side of fire prevention net (2) is equipped with deposition case (13), just deposition case (13) with first cavity (5) intercommunication is located the lateral wall of the blast pipe of third cavity (7) is equipped with evenly distributed's through-hole, just third cavity (7) intussuseption is filled with the fire prevention and inhales the sound cotton.

2. The spark muffler for a diesel engine according to claim 1, wherein the first and second flow pipes each include a vertical flow pipe and an elbow (14), and an opening of the elbow of the first flow pipe and an opening of the elbow of the second flow pipe are disposed in the same direction.

3. A spark muffler for a diesel engine according to claim 1, wherein the inlet pipe (9) is provided at its beginning with a first flange (11) and the outlet pipe (10) is provided at its end with a second flange (12).

4. A spark muffler for a diesel engine according to claim 1, wherein the muffler case (1) includes an outer metal shell (1a), an asbestos insulation layer (1b) and an inner metal shell (1c) in this order from the outside to the inside.

5. The spark muffler for a diesel engine according to claim 1, wherein the number of the fire prevention nets (2) is two, and the meshes of the two fire prevention nets are staggered.

6. The spark muffler for a diesel engine according to claim 1, wherein the fireproof sound-absorbing cotton is rock wool.