CN210622892U

CN210622892U - Commercial vehicle postprocessor

Info

Publication number: CN210622892U
Application number: CN201921093999.3U
Authority: CN
Inventors: 樊赞; 杨群; 张楚良; 陶勇; 朱朝龙; 赵培
Original assignee: Hubei Dinex Tongda Emission Treatment System Co ltd
Current assignee: Hubei Dinex Tongda Emission Treatment System Co ltd
Priority date: 2019-07-13
Filing date: 2019-07-13
Publication date: 2020-05-26
Anticipated expiration: 2029-07-13

Abstract

The utility model relates to a commercial vehicle postprocessor, which comprises a shell, a clapboard, a carrier and a silencing pipe; the shell is provided with an air inlet pipe and an air outlet pipe; the air inlet pipe and the air outlet pipe are both arranged at the front end part of the shell; the partition plate comprises a front partition plate and a rear partition plate; a reinforcing strip is connected between the front partition plate and the rear partition plate; the front partition plate and the rear partition plate divide the inner cavity of the shell into a front mixing cavity, a middle mixing cavity and a rear silencing cavity; one end of the air outlet pipe extends into the front mixing cavity, and supporting pipes are uniformly distributed on the outer part of the air outlet pipe along the circumferential direction; the front end of the supporting tube is fixedly connected with the front end cover, and the rear end of the supporting tube is fixedly connected with the front clapboard; a bracket is fixedly connected between the lower part of the other end of the air outlet pipe extending out of the shell and the outer wall of the front end cover. The utility model has the advantages of simple and reasonable design, noise reduction effect is good, and tail gas conversion efficiency is high, and sound construction uses reliable and stable.

Description

Commercial vehicle postprocessor

Technical Field

The utility model relates to a vehicle aftertreatment ware technical field, concretely relates to commercial car aftertreatment ware.

Background

The basic working principle of the post-processor is that the combustion process in a cylinder of the diesel engine is optimized, so that the emissions of carbon monoxide (CO), Hydrocarbon (HC), Particles (PM) and the like in the combustion exhaust gas are effectively controlled and meet the requirements of regulations, and finally, nitrogen oxides (NOx) with high content in the exhaust gas discharged by the engine are treated by a special vehicle-mounted post-treatment system so as to meet the requirements of the regulations. During the post-treatment process, the dosing unit can accurately inject the urea amount matched with the operation condition of the engine into the exhaust pipe according to the instruction given by the electronic control unit of the engine, and the ammonia and the nitrogen oxides decomposed from the urea are subjected to catalytic reduction reaction in the catalyst to finally generate harmless nitrogen (N2) and water (H2O). It has been determined that the conversion of nitrogen oxides by SCR exhaust aftertreatment systems can typically reach over 60%. However, the existing vehicle post-processor has certain defects in structural design, the baffle inside the post-processor deforms in the using process, the air outlet pipe is broken, and the like, so that the normal use of the post-processor is seriously influenced, the silencing and noise reducing effects are seriously influenced, the tail gas conversion efficiency is low, and the diversified requirements of customers on the interface form and performance of the post-processor cannot be met.

Disclosure of Invention

To the problem that exists among the above-mentioned background art, the utility model provides a structural design is simple, reasonable, and the sound construction uses reliable and stable, and noise reduction effect is good, the efficient commercial car aftertreatment ware of tail gas conversion.

The utility model discloses a realize through following technical scheme:

the commercial vehicle postprocessor comprises a shell, a partition board, a carrier and a silencing pipe; the shell is internally provided with an accommodating space, the front end part of the shell is provided with a front end cover, and the rear end of the shell is provided with a rear end cover; the shell is also provided with an air inlet pipe and an air outlet pipe; one end of the air inlet pipe extends into the inner side of the shell, and the other end of the air inlet pipe extends out of the shell and is connected with a tail pipe of the engine; the other end of the air inlet pipe, which extends out of the shell, is also provided with a nozzle seat; one end of the air outlet pipe extends into the inner side of the shell, and the other end of the air outlet pipe extends out of the shell and is connected with an air outlet tail pipe of the vehicle; the partition plate is vertically arranged in the inner cavity of the shell; the carrier and the silencing pipe are mounted in the inner cavity of the shell in a matching manner and are supported by the partition plate; the air inlet pipe and the air outlet pipe are arranged at the front end part of the shell in a matching way and face the outer side of the vehicle chassis; the partition plate comprises a front partition plate and a rear partition plate which are vertically arranged in the inner cavity of the shell; a reinforcing strip is connected between the front partition plate and the rear partition plate in a matching manner; the front partition plate and the rear partition plate divide the inner cavity of the shell into a front mixing cavity, a middle mixing cavity and a rear silencing cavity; one end of the air outlet pipe extends into the front mixing cavity, and supporting pipes are uniformly distributed on the outer part of the air outlet pipe along the circumferential direction; the front end of the supporting tube is fixedly connected with the front end cover, and the rear end of the supporting tube is fixedly connected with the front clapboard; and a support is fixedly connected between the lower part of the other end of the air outlet pipe extending out of the shell and the outer wall of the front end cover.

The commercial car aftertreatment ware, wherein: the lower side of the front end part of the shell is connected with the air inlet pipe and the air outlet pipe which are on the same horizontal line.

The commercial car aftertreatment ware, wherein: one end of the air inlet pipe extending out of the shell is connected with a tail pipe of the engine through a hoop; the air outlet pipe is a flange type air outlet pipe, and one end of the air outlet pipe, extending out of the shell, is also connected with the air outlet tail pipe of the vehicle through a hoop.

The commercial car aftertreatment ware, wherein: the outer side of the rear end cover is provided with a heat insulation plate in a matching way; the inner side surface of the front end cover is provided with a baffle in a matching way; and heat insulation cotton is filled between the front end cover and the baffle.

The commercial car aftertreatment ware, wherein: the surface of the rear baffle plate is provided with a plurality of combined small holes so as to form an exhaust passage from the middle mixing cavity to the rear silencing cavity.

The commercial car aftertreatment ware, wherein: the carrier and the silencing pipe horizontally penetrate through the front partition plate and the rear partition plate; the silencing pipe is positioned in an inner cavity at the lower side of the shell and adopts a double-barrel type silencing pipe, and the carrier is positioned above the silencing pipe; the front end of the carrier extends into the front mixing cavity, the middle section of the carrier is positioned in the middle mixing cavity, and the rear end of the carrier extends into the rear silencing cavity; the rear end of the silencing pipe is located in the rear silencing cavity, the end part of the silencing pipe is provided with a pipe cover in a matching mode, the front end of the silencing pipe is located in the front mixing cavity, the end part of the silencing pipe is in matched butt joint with one end of the air inlet pipe extending into the inner cavity of the shell, and the middle section of the silencing pipe is located in the middle mixing cavity.

The commercial car aftertreatment ware, wherein: the post-processor further comprises a mixer; the mixer comprises a first mixer and a second mixer; the first mixer is matched and arranged inside a section of the silencing pipe in the front mixing cavity; the second mixer is matingly mounted within a section of the carrier between the front and rear baffles.

Has the advantages that:

the utility model discloses commercial car aftertreatment ware structural design is simple, reasonable, and the sound construction, especially with outlet duct and intake pipe in the same side of aftertreatment ware and towards the chassis outside, avoids the air current to produce the influence to other annexes of aftertreatment ware, applicable in dangerization article motorcycle type, has satisfied the diversified demand of customer to the aftertreatment ware interface form; the reinforcing strips with matched intervals are additionally arranged between the front partition plate and the rear partition plate, so that the reinforcing effect can be provided for the partition plate, and the deformation of the partition plate in the manufacturing process of the postprocessor and the abnormal sound of the partition plate in the using process are avoided; the supporting tube is arranged outside one end of the air outlet tube extending into the front mixing cavity to provide supporting force for the air outlet tube, so that the fracture of the connecting part of the air outlet tube and the front clapboard is avoided in the using process of the air outlet tube; the bracket is arranged between the lower part of the other end of the pipe body, extending out of the outer side of the shell, of the outlet pipe and the outer wall of the front end cover, the outlet pipe is fixed by the bracket, the strength of the connecting part of the outlet pipe and the front end cover is improved, the connecting part of the outlet pipe and the front end cover is prevented from being broken, and the whole postprocessor is stable and reliable to use. Meanwhile, the independently designed structural components such as the nozzle seat, the front end cover, the rear end cover, the front partition plate, the rear partition plate, the mixer, the silencing pipe, the heat insulation plate and the like are adopted, so that the national fifth emission requirement of commercial vehicles can be effectively met, the exhaust back pressure of the engine is reduced, the exhaust noise of the engine and other key indexes are reduced, the silencing and noise reduction effects are good, and the tail gas conversion efficiency is high.

Drawings

FIG. 1 is a front view of the utility model of a commercial vehicle postprocessor;

FIG. 2 is a right side view of the commercial vehicle aftertreatment device of the present invention;

FIG. 3 is a left side view of the utility model of a commercial vehicle postprocessor;

fig. 4 is a top view of the utility model discloses commercial car aftertreatment ware.

Detailed Description

As shown in fig. 1 to 4, the utility model discloses commercial car aftertreatment ware, including casing 1, baffle 2, carrier 3, blender 4, hush pipe 5 and nozzle holder 6.

The shell 1 is internally provided with an accommodating space, the front end part of the shell is provided with a front end cover 11 in a matching way, the rear end of the shell is provided with a rear end cover 12 in a matching way, and a heat insulation plate 121 is arranged on the outer side of the rear end cover 12 in a matching way; the rear end cover 12 has the characteristics of high strength and being beneficial to the flow of gas in the cavity; the heat shield 13 has ribs on its surface to isolate the high temperature of the aftertreatment surface. The baffle 111 is arranged on the inner side surface of the front end cover 11 in a matching way, and the heat insulation cotton 112 is filled between the front end cover 11 and the baffle 111, so that the heat insulation and noise reduction performance of the postprocessor can be improved. The lower side of the front end part of the shell 1 is connected with an air inlet pipe 13 and an air outlet pipe 14 which are positioned on the same horizontal line; the air inlet pipe 13 adopts a brand-new spinning process. Wherein, this outlet duct 14 and intake pipe 13 are in the same side of casing 1 and towards the chassis outside, avoid the air current to produce the influence to other parts of aftertreatment ware annex, are applicable to the dangerization article motorcycle type.

The partition board 2 is vertically arranged in the inner cavity of the shell 1 and comprises a front partition board 21 and a rear partition board 22 which are vertically arranged in the inner cavity of the shell 1; the lower extreme of this preceding baffle 21 and back baffle 22 between the accordant connection have strengthen strip 23, should strengthen strip 23 adopt with preceding baffle 21 and back baffle 22 between the interval assorted strengthen strip 23, for baffle 2 provides the reinforcing effect, avoid the after treatment ware in manufacturing process baffle 2 to take place to warp and the use in baffle 2 takes place the abnormal sound. The front partition 21 and the rear partition 22 divide the inner cavity of the housing 1 into a front mixing chamber 15, a middle mixing chamber 16 and a rear muffler chamber 17; the front partition 21 and the rear partition 22 are used to support the silencer duct 6 and the carrier 3; a plurality of meshes are uniformly distributed on the surface of the rear partition plate 22 to form an exhaust passage from the middle mixing cavity 16 to the rear silencing cavity 17, and the exhaust passage is used for mixing and circulating gas before reaction; the housing 1 has a sensor 18 and a holder 19 mounted on the outer wall of the housing corresponding to the front mixing chamber 15.

One end of the air inlet pipe 13 horizontally extends into the inner cavity of the shell 1 to be communicated with the front mixing cavity 15, and the other end of the air inlet pipe 13 horizontally extends to the outer side of the shell 1 and is connected with a tail pipe of an engine through a hoop; the air outlet pipe 14 is a flange type air outlet pipe, one end of the air outlet pipe 14 extends into the front mixing cavity 15 of the shell 1, and the other end of the air outlet pipe 14 extends out of the shell 1 and is connected with a tail air outlet pipe of a vehicle through a hoop to discharge purified tail gas. 8 supporting tubes 141 with strip-shaped holes are uniformly distributed on the outer part of the tube body of the air outlet tube 14 in the front mixing cavity 15 along the circumferential direction; the front end of the supporting tube 141 is fixedly connected with the front end cover 11, and the rear end is fixedly connected with the front clapboard 21 of the clapboard 2; the outlet pipe 14 is supported by the support pipe 141 to provide a supporting force for the outlet pipe 14, and the fracture of the connection part of the outlet pipe 14 and the baffle plate 2 is avoided in the use process of the outlet pipe 14. The outer wall of the lower part of the pipe body at the end of the air outlet pipe 14 extending out of the shell 1 and the outer wall of the front end cover 11 are fixedly connected with a support 142, the air outlet pipe is fixed by the support 142, the strength of the connecting part of the air outlet pipe 14 and the front end cover 11 is improved, and the connecting part of the air outlet pipe 14 and the front end cover 11 is prevented from being broken.

The carrier 3 is matched and arranged in the inner cavity of the shell 1 and horizontally penetrates through the front partition plate 21 and the rear partition plate 22 of the partition plate 2; the front end of the carrier 3 extends into a front mixing cavity 15 of the shell 1, the middle section is positioned in a middle mixing cavity 16 of the shell 1, and the rear end extends into a rear silencing cavity 17 of the shell 1; wherein, the carrier 3 adopts a self-designed metal carrier, and CO and NO gas which does not meet the emission standard is converted into N through a catalyst contained in a carrier coating₂And H₂And O, absorbing the tail gas particles in the metal carrier 3 to achieve the purpose of purifying the tail gas.

The mixer 4 includes a first mixer 41 and a second mixer 42. The first mixer 41 is fittingly mounted inside a section of the muffler pipe 5 located in the front mixing chamber 15; the first mixer 4 can improve the mixing efficiency of the urea spray and the engine exhaust. The second mixer 42 is fittingly installed inside a section of the carrier 3 between the front partition 21 and the rear partition 22 of the partition 2; the second mixer 42 can improve the gas mixing efficiency of the carrier 3 to improve the conversion efficiency of the tail gas.

The silencing pipe 5 is positioned at the lower side of the inner cavity of the shell 1 and horizontally passes through the front partition plate 21 and the rear partition plate 22 of the partition plate 2, and the carrier 3 is positioned above the silencing pipe 5; the rear end of the silencing pipe 5 is positioned in the rear silencing cavity 17 of the shell 1, the end part of the silencing pipe is matched with and provided with a pipe cover 51, the front end of the silencing pipe 5 is positioned in the front mixing cavity 15 of the shell 1, the end part of the silencing pipe is matched and butted with one end of an air inlet pipe 13 extending into the inner cavity of the shell 1, and the middle section of the silencing pipe 5 is positioned in the middle mixing cavity 16 of the shell 1. The muffler pipe 5 is a double-tube muffler pipe, so that the exhaust gas can be dispersed into the rear muffler chamber 17 through a pipe cap 51 at the rear end of the muffler pipe 5.

The nozzle holder 6 is arranged at one end of the air inlet pipe 13 of the shell 1, which extends out of the shell 1; wherein, the nozzle seat 6 adopts a nozzle seat matched with a German European Bo Nall injector, and the urea injection angle is ensured to be optimal.

The utility model discloses commercial car aftertreatment ware is applicable to dCi11 national five 450 horsepower engines, satisfies the thermodynamics requirement, and surface temperature is less than 500 ℃, and the outward appearance accords with "DFCVCJ 2008-2013" requirement. The utility model discloses commercial car aftertreatment ware's rated torque is more than or equal to 20dB (A), and exhaust back pressure is less than or equal to 12KPa under the rated operating mode, and sealing pressure is 0.3bar, and the leakage quantity is no longer than 5L/min, and emission performance satisfies GB17691-2005 and HJ451-2008 ' requirement, and the durability satisfies GB20890-2007 and HJ438-2008 ' requirement.

The test proves that: the utility model discloses commercial car aftertreatment ware has conversion efficiency height, and the noise cancelling effect is good, and exhaust backpressure is low, characteristics that power loss is little.

The utility model discloses commercial car aftertreatment ware structural design is simple, reasonable, and noise reduction effect is good, and tail gas conversion efficiency is high, and the sound construction uses reliable and stable.

Claims

1. A commercial vehicle postprocessor comprises a shell, a partition board, a carrier and a silencing pipe; the shell is internally provided with an accommodating space, the front end part of the shell is provided with a front end cover, and the rear end of the shell is provided with a rear end cover; the shell is also provided with an air inlet pipe and an air outlet pipe; one end of the air inlet pipe extends into the inner side of the shell, and the other end of the air inlet pipe extends out of the shell and is connected with a tail pipe of the engine; the other end of the air inlet pipe, which extends out of the shell, is also provided with a nozzle seat; one end of the air outlet pipe extends into the inner side of the shell, and the other end of the air outlet pipe extends out of the shell and is connected with an air outlet tail pipe of the vehicle; the partition plate is vertically arranged in the inner cavity of the shell; the carrier and the silencing pipe are mounted in the inner cavity of the shell in a matching manner and are supported by the partition plate; the method is characterized in that: the air inlet pipe and the air outlet pipe are arranged at the front end part of the shell in a matching way and face the outer side of the vehicle chassis;

the partition plate comprises a front partition plate and a rear partition plate which are vertically arranged in the inner cavity of the shell; a reinforcing strip is connected between the front partition plate and the rear partition plate in a matching manner; the front partition plate and the rear partition plate divide the inner cavity of the shell into a front mixing cavity, a middle mixing cavity and a rear silencing cavity;

one end of the air outlet pipe extends into the front mixing cavity, and supporting pipes are uniformly distributed on the outer part of the air outlet pipe along the circumferential direction; the front end of the supporting tube is fixedly connected with the front end cover, and the rear end of the supporting tube is fixedly connected with the front clapboard; and a support is fixedly connected between the lower part of the other end of the air outlet pipe extending out of the shell and the outer wall of the front end cover.

2. The commercial vehicle aftertreatment device of claim 1, wherein: the lower side of the front end part of the shell is connected with the air inlet pipe and the air outlet pipe which are on the same horizontal line.

3. The commercial vehicle aftertreatment device of claim 1, wherein: one end of the air inlet pipe extending out of the shell is connected with a tail pipe of the engine through a hoop; the air outlet pipe is a flange type air outlet pipe, and one end of the air outlet pipe, extending out of the shell, is also connected with the air outlet tail pipe of the vehicle through a hoop.

4. The commercial vehicle aftertreatment device of claim 1, wherein: the outer side of the rear end cover is provided with a heat insulation plate in a matching way; the inner side surface of the front end cover is provided with a baffle in a matching way; and heat insulation cotton is filled between the front end cover and the baffle.

5. The commercial vehicle aftertreatment device of claim 1, wherein: the surface of the rear baffle plate is provided with a plurality of combined small holes so as to form an exhaust passage from the middle mixing cavity to the rear silencing cavity.

6. The commercial vehicle aftertreatment device of claim 1, wherein: the carrier and the silencing pipe horizontally penetrate through the front partition plate and the rear partition plate; the silencing pipe is positioned in an inner cavity at the lower side of the shell and adopts a double-barrel type silencing pipe, and the carrier is positioned above the silencing pipe;

the front end of the carrier extends into the front mixing cavity, the middle section of the carrier is positioned in the middle mixing cavity, and the rear end of the carrier extends into the rear silencing cavity;

the rear end of the silencing pipe is located in the rear silencing cavity, the end part of the silencing pipe is provided with a pipe cover in a matching mode, the front end of the silencing pipe is located in the front mixing cavity, the end part of the silencing pipe is in matched butt joint with one end of the air inlet pipe extending into the inner cavity of the shell, and the middle section of the silencing pipe is located in the middle mixing cavity.

7. The commercial vehicle aftertreatment device of claim 6, wherein: the post-processor further comprises a mixer; the mixer comprises a first mixer and a second mixer; the first mixer is matched and arranged inside a section of the silencing pipe in the front mixing cavity; the second mixer is matingly mounted within a section of the carrier between the front and rear baffles.