CN111237040B - Tail gas aftertreatment device with heat insulation and rainproof functions for tractor - Google Patents
Tail gas aftertreatment device with heat insulation and rainproof functions for tractor Download PDFInfo
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- CN111237040B CN111237040B CN202010207409.6A CN202010207409A CN111237040B CN 111237040 B CN111237040 B CN 111237040B CN 202010207409 A CN202010207409 A CN 202010207409A CN 111237040 B CN111237040 B CN 111237040B
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- 238000009413 insulation Methods 0.000 title claims abstract description 66
- 229910001220 stainless steel Inorganic materials 0.000 claims description 56
- 239000010935 stainless steel Substances 0.000 claims description 56
- 230000001681 protective effect Effects 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 238000004321 preservation Methods 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 14
- 229920000742 Cotton Polymers 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 239000011888 foil Substances 0.000 claims description 11
- 238000004806 packaging method and process Methods 0.000 claims description 10
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 7
- 230000003197 catalytic effect Effects 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 21
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- 230000004224 protection Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 4
- 238000012805 post-processing Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/085—Other arrangements or adaptations of exhaust conduits having means preventing foreign matter from entering exhaust conduit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention relates to a tail gas post-treatment device with heat insulation and rainproof functions for a tractor, which comprises a tail gas post-treatment system, a heat insulation and rainproof system, wherein the heat insulation and rainproof system is arranged outside the tail gas post-treatment system, the rainproof system comprises an exhaust pipe, an exhaust pipe shield, a diversion cone and a rainproof cap at the top of the exhaust pipe, a rain collector between the exhaust pipe and the exhaust pipe shield, and a rainproof pipe connected to the exhaust pipe shield, and the rainproof system is connected with the tail gas post-treatment system and the heat insulation and rainproof system; on the other hand, through rain insensitive device, can effectually prevent that rainwater from getting into aftertreatment device, avoid the rainwater to get into and cause the influence to carrier, catalyst, liner's performance.
Description
Technical Field
The invention belongs to the technical field of exhaust aftertreatment of tractors, and particularly relates to an exhaust aftertreatment device with heat insulation and rainproof functions for a tractor.
Background
As is well known, diesel engines are becoming increasingly popular for their high thermal efficiency, good reliability and durability. At present, the emission regulations of road six and non-road four in China strictly limit the particulate matter emission, the particulate matter emission and the nitrogen oxide emission of the diesel engine, and increasingly strict emission regulations force diesel engine manufacturers to install a particulate trap and a selective catalytic reduction device to meet the new emission regulation requirements.
An oxidation-type catalytic converter (Diesel Oxidation Catalyst, abbreviated as DOC) for oxidizing carbon monoxide (CO), hydrocarbon (HC) and Nitric Oxide (NO) in the exhaust gas to be harmless by catalytic oxidation; the particle catcher (Diesel Particulate Filter, abbreviated as DPF) is one of the most effective means for solving the emission problem of diesel particles currently accepted by trapping particles in the exhaust gas of an engine in a filter structure through a filter material; a selective catalytic Reduction device (SELECTIVE CATALYTIC Reduction device, SCR for short) converts toxic nitrogen oxides (NO X) in exhaust gas into non-toxic nitrogen (N 2) and water (H 2 O) through a selective catalytic Reduction reaction, and is one of the most effective means for solving the problem of nitrogen oxides of a diesel engine currently acknowledged.
In the operation process of the tractor, higher requirements are set on the surface temperature, and particularly in the active regeneration process of the DPF, the post-treatment of the tail gas of the tractor is required to have a better heat insulation function; meanwhile, in order to improve the catalytic conversion efficiency under the condition of low SCR load, the post-treatment of the tail gas of the tractor has a good heat preservation function under the condition of low exhaust temperature; also, due to seasonal operation characteristics of the tractor, the tractor is often placed in the open air for a long time, and in rainy and snowy days, the rainy and snowy days enter the post-treatment device and finally gather at the lowest position of the exhaust pipeline; the rainwater gathers in the exhaust pipe for a long time, which can cause adverse effect on the performances of the carrier, the gasket and the catalyst, and finally affect the performances and the durability of the exhaust aftertreatment device of the tractor.
Therefore, how to solve the heat insulation and rain protection problems of the tail gas aftertreatment device of the tractor is important to improving the reliability and durability of the aftertreatment device.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the tail gas aftertreatment device with the heat insulation and rainproof functions for the tractor, which has the advantages of compact structure, convenient disassembly and assembly and strong universality, and can meet the heat insulation and rainproof requirements of different types of aftertreatment devices.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: tail gas aftertreatment device of rain-proof function of thermal-insulated heat preservation in area for tractor includes: the tail gas post-treatment system comprises a post-treatment unit, a post-treatment V-shaped clamp and a post-treatment end vertebral canal, wherein the post-treatment unit is connected with the post-treatment end vertebral canal through the post-treatment V-shaped clamp; the heat insulation system is arranged outside the tail gas aftertreatment system and sequentially comprises a double-layer stainless steel knurling heat insulation device, a double-layer aluminum foil heat insulation device and an aftertreatment protective cover, wherein the double-layer stainless steel knurling heat insulation device is connected with an aftertreatment unit of the tail gas aftertreatment system through welding; the double-layer aluminum foil heat insulation device is wrapped on the double-layer stainless steel knurled heat insulation device, and the post-treatment protective cover is arranged on the outer side of the double-layer aluminum foil heat insulation device and is fixed on the base of the post-treatment unit; the rainproof system comprises an exhaust pipe, an exhaust pipe shield, a diversion cone and a rainproof cap at the top of the exhaust pipe, a rain collector between the exhaust pipe and the exhaust pipe shield, and a rainproof pipe connected to the exhaust pipe shield, wherein the rainproof system is connected with a post-treatment end cone pipe of the tail gas post-treatment system through the exhaust pipe, and the exhaust pipe shield of the rainproof system is connected with a post-treatment shield of the heat insulation system.
Further, the exhaust pipe is arranged on the post-treatment end taper pipe and is fixed through an exhaust pipe hoop; the exhaust pipe shield is arranged on the outer side of the exhaust pipe and is connected with the aftertreatment shield through an exhaust pipe shield hoop; the exhaust pipe protective cover end cone cover is arranged on the exhaust pipe protective cover, and the rain-proof pipe is arranged on the exhaust pipe protective cover end cone cover and is fixed through a rain-proof pipe hoop.
Further, the rain-proof cap is hollow cone-shaped and the diameter of the bottom of the conical surface is larger than the outer diameter of the exhaust pipe, the diversion cone is hollow cone-shaped and the diameter of the bottom of the conical surface is smaller than the inner diameter of the exhaust pipe, the cone angle of the diversion cone is downwards arranged inside the top end of the exhaust pipe and is connected with the exhaust pipe through welding, the cone angle of the rain-proof cap is upwards covered on the top end of the exhaust pipe and is connected with the diversion cone through welding, and a plurality of exhaust holes are formed in the pipe wall of the exhaust pipe outside the diversion cone.
Further, the inner side of the rain collector is connected with the exhaust pipe through welding, the outer side of the rain collector is connected with the exhaust pipe shield, the upper portion of the rain collector is provided with an inclined conical surface, and the conical angle of the conical surface of the rain collector is the same as that of the diversion cone.
Further, the rain-proof pipe comprises a first straight pipe section, a transition pipe section, a second straight pipe section and a rain-proof pipe section, wherein the axis of the first straight pipe section coincides with the axis of the exhaust pipe and is connected with the end cone cover of the exhaust pipe protection cover, the axis of the second straight pipe section is perpendicular to the axis of the exhaust pipe and is connected with the first straight pipe section through the transition section, the other end of the second straight pipe section is connected with the rain-proof pipe section, the pipe orifice of the rain-proof pipe section is inclined, the pipe wall of the upper end is larger than the pipe wall of the lower end, and the pipe wall of the lower end of the rain-proof pipe section is inclined downwards.
Further, the double-layer stainless steel knurling heat insulation device comprises an outer stainless steel thin steel plate, an inner stainless steel thin steel plate and heat insulation cotton, wherein the heat insulation cotton is positioned between the outer stainless steel thin steel plate and the inner stainless steel thin steel plate, stainless steel knurling protrusions are arranged on the outer stainless steel thin steel plate and the inner stainless steel thin steel plate and face the direction away from the heat insulation cotton, the double-layer stainless steel knurling heat insulation device is fixed on a post-treatment unit of a post-treatment system in a welding mode, and the stainless steel knurling protrusions on the inner stainless steel thin steel plate are in contact with the outer surface of the post-treatment unit of the post-treatment system.
Further, the post-treatment unit is composed of one or more than one packaging units of an oxidation type catalytic converter DOC, a particle catcher DPF and a selective catalytic reduction device SCR, and when the post-treatment unit is composed of more than two packaging units, the packaging units are connected together through a V-shaped clamp or flange connection mode.
The beneficial effects are that: the tail gas aftertreatment device with the heat preservation, heat insulation and rain prevention functions for the tractor is reasonable in design, compact in structure, convenient to assemble and disassemble, and high in universality, and can meet the heat preservation, heat insulation and rain prevention requirements of different types of aftertreatment devices: on the one hand, through the heat insulation device, the surface temperature of the treatment device can be effectively reduced under the condition of higher temperature after vortex, the heat dissipation capacity of the post-treatment device can be reduced under the condition of lower temperature after vortex, and the low-temperature performance of the post-treatment product is improved; on the other hand, through rain insensitive device, can effectually prevent that rainwater from getting into aftertreatment device, avoid the rainwater to get into and cause the influence to carrier, catalyst, liner's performance.
Drawings
FIG. 1 is a schematic diagram of the main system structure of the present invention;
FIG. 2 is a schematic diagram of a system architecture according to the present invention;
FIG. 3 is a schematic diagram of a partial structure of a double-layer stainless steel knurling heat insulation device of the invention;
fig. 4 is a schematic view of the structure of the rain pipe of the present invention.
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
As shown in FIG. 1, the invention provides a tail gas post-treatment device with heat insulation and rainproof functions for a tractor, which comprises: the tail gas aftertreatment system S10, the heat insulation and preservation system S20 and the rain-proof system S30 are arranged outside the tail gas aftertreatment system S10, the heat insulation and preservation effect is achieved, the rain-proof system S30 is connected with the tail gas aftertreatment system S10 and the heat insulation and preservation system S20, and rainwater is effectively prevented from entering the aftertreatment device.
As shown in fig. 2, the exhaust gas aftertreatment system S10 includes: a post-processing unit 11 for post-processing the end vertebral canal 13 and a post-processing V-shaped clamp 12; the post-treatment unit 11 and the post-treatment end vertebral canal 13 are connected together through a post-treatment V-shaped clamp 12, wherein the post-treatment unit is composed of one or more packaging units of DOC (oxidation-type catalytic converter), DPF (particle catcher) and SCR (selective catalytic reduction device), and the packaging units comprise but are not limited to the following combination modes: DOC, DPF, SCR, DOC +DPF, DOC+SCR, DPF+SCR, DOC+DPF+SCR; when the post-processing unit is composed of more than two packaging units, the packaging units are connected together through a V-shaped clamp.
The heat insulation system S20 includes: double-layer stainless steel knurling heat insulation device 21, double-layer aluminum foil heat insulation device 22 and post-treatment protective cover 23; the double-layer aluminum foil heat insulation device 22 is wrapped on the double-layer stainless steel knurled heat insulation device 21, the post-treatment protective cover 23 is arranged on the outer side of the double-layer aluminum foil heat insulation device 22, and the post-treatment protective cover 23 is fixed on the post-treatment unit 11; specifically, the stainless steel knurled heat insulation device 21 of the heat insulation system S20 is connected with the post-treatment unit 11 of the tail gas post-treatment system S10 by welding; the post-treatment hood 23 of the insulation system S20 is fixed to the base of the post-treatment unit 11.
As shown in fig. 3, the double-layer stainless steel knurled heat-insulating and heat-preserving device 21 includes an outer stainless steel sheet 213, an inner stainless steel sheet 211, and heat-preserving cotton 212, the heat-preserving cotton 212 being located between the outer stainless steel sheet 213 and the inner stainless steel sheet 211; the outer stainless steel sheet 213 and the inner stainless steel sheet 211 are provided with stainless steel knurling protrusions, one sides of the stainless steel knurling protrusions face outwards (i.e. the protrusions face away from the heat preservation cotton), the double-layer stainless steel knurling heat insulation device 21 is fixed on the post-treatment unit 11 of the post-treatment system S10 in a welding manner, as shown in fig. 3, the inner stainless steel sheet 211 of the double-layer stainless steel knurling heat insulation device 21 is provided with stainless steel knurling protruding parts which are in contact with the outer surface of the post-treatment unit 11 of the post-treatment system S10.
In the working process of the engine, as the surface of the inner side stainless steel sheet 211 of the double-layer stainless steel knurl heat insulation device 21 is provided with the bulges, the contact area between the inner side stainless steel sheet 211 of the double-layer stainless steel knurl heat insulation device 21 and the post-treatment unit 11 is greatly reduced, the heat transfer efficiency between the post-treatment unit 11 and the heat insulation cotton 212 of the double-layer stainless steel knurl heat insulation device 21 is reduced, and the purpose of preliminary heat insulation is achieved; then when heat is transferred to the outer side stainless steel sheet 213 of the double-layer stainless steel knurl heat-insulating device 21 through the heat-insulating cotton 212 of the double-layer stainless steel knurl heat-insulating device 21, the surface temperature of the outer side stainless steel sheet 213 of the double-layer stainless steel knurl heat-insulating device 21 is further reduced due to the small heat conductivity coefficient of the heat-insulating cotton 212; the double-layer aluminum foil heat insulation device 22 is wrapped on the double-layer stainless steel knurled heat insulation device 21, so that the heat insulation effect can be further achieved; the heat is mainly transferred between the double-layer aluminum foil heat insulation device 22 and the post-treatment protective cover 23 in a heat radiation mode, so that the heat transfer rate is further reduced, and finally, the aim of reducing the surface temperature of the post-treatment protective cover 23 is fulfilled.
As shown in fig. 2, the rain protection system S30 includes: the exhaust pipe hood 32, the exhaust pipe 33, the exhaust pipe hood hoop 30, the exhaust pipe hoop 31, the rain collector 34, the diversion cone 35, the rain hat 36, the exhaust pipe hood end cone cover 37, the rain pipe hoop 38 and the rain pipe 39. The exhaust pipe 33 is arranged on the post-treatment end taper pipe 13, the exhaust pipe shield 32 is arranged outside the exhaust pipe 33 and is connected with the post-treatment shield 23 of the heat insulation system S20; the exhaust pipe protective cover end cone cover 37 is arranged on the exhaust pipe protective cover 32, the rain pipe 39 is arranged on the exhaust pipe protective cover end cone cover 37, and the rain pipe protective cover is fixed through a rain pipe hoop 38; the rainproof system S30 is connected with a post-treatment end taper pipe 13 of the tail gas post-treatment system S10 through an exhaust pipe 33 and is fixed together through an exhaust pipe hoop 31; the rain-proof system S30 is connected with the post-treatment protection cover 23 of the heat insulation system S20 through an exhaust pipe protection cover 32 and is fixed together through an exhaust pipe protection cover hoop 30.
The rain cap 36 is of a hollow conical design, the diameter of the bottom of the conical surface is larger than the outer diameter of the exhaust pipe 33, the flow guide cone 35 is of a hollow design, the diameter of the bottom of the conical surface is smaller than the inner diameter of the exhaust pipe 33, a plurality of exhaust holes are formed in the pipe wall of the top end of the exhaust pipe 33, the conical angle of the flow guide cone 35 is downwards arranged inside the pipe mouth of the exhaust pipe 33 and is connected with the exhaust pipe 33 through welding, the conical angle of the rain cap 36 covers the pipe mouth of the exhaust pipe 33 upwards and is used for blocking rain and snow from entering the inside of the exhaust pipe 33, the rain cap 36 is connected with the flow guide cone 35 through welding, the rain collector 34 is arranged on the outer side of the exhaust pipe 33 at the lower part of the rain cap 36, the inner side of the rain collector 34 is commonly welded with the exhaust pipe 33, the outer side of the rain collector 34 is connected with the exhaust pipe shield 32, the conical surface is formed in the upper part of the rain collector 34, the angle of the conical surface is identical to the conical angle of the flow guide cone 35, and when the air flow in the exhaust pipe 33 reaches the top end of the exhaust pipe, and under the guidance of the flow guide cone 35, the plurality of exhaust holes on the pipe wall of the pipe 33 flow guide cone 35 flow upwards flows out from the space between the flow guide cone 35 and the conical surface of the rain collector 34 through the pipe wall, and the conical surface of the water collector 34, and the parallel air flow resistance of the flow is favorable for reducing.
As shown in fig. 4, the rain-proof pipe 39 includes a first straight pipe section 40, a transition pipe section 41, a second straight pipe section 42 and a rain-proof pipe section 43, wherein the axis of the first straight pipe section 40 coincides with the axis of the exhaust pipe 33 and is connected with the end cone cover 37 of the exhaust pipe protection cover, the axis of the second straight pipe section 42 is perpendicular to the axis of the exhaust pipe 33 and is connected with the first straight pipe section 40 through the transition section 41, the other end of the second straight pipe section 42 is connected with the rain-proof pipe section 43, the pipe orifice of the rain-proof pipe section 43 is inclined, the pipe wall of the upper end is larger than the pipe wall of the lower end, rainwater can be prevented from falling into the pipe orifice directly, the pipe wall of the lower end of the rain-proof pipe section 43 is inclined downwards, on one hand, the rain and snow entering the pipe orifice is prevented from accumulating in the pipe orifice, and on the other hand, the outlet of the rain-proof pipe section is in a micro-horn shape, and the air flow is facilitated to be discharged.
The rain-proof system S30 is provided with multiple protections, the rain-proof pipe 39 is designed to effectively prevent rain, snow and rainwater from falling into the pipeline, the rain-proof cap 36 and the rain collector 34 are further designed at the pipe orifice of the exhaust pipe 33, the rain-proof cap 36 can further prevent the rainwater from falling into the exhaust pipe 33, the rainwater can be guided to the rain collector 34 through the conical surface of the rain-proof cap, the rainwater falling through the rain collector 34 cannot enter the post-treatment device, and the influence of the rainwater entering on the performance of a carrier, a catalyst and a gasket is avoided.
The heat-insulating and rainproof device has the advantages of reasonable design, compact structure, convenient disassembly and assembly and strong universality, and can meet the heat-insulating and rainproof requirements of different types of aftertreatment devices, on one hand, through the heat-insulating and heat-insulating device, the surface temperature of the aftertreatment device can be effectively reduced under the condition that the temperature of an engine after vortex is higher, the heat dissipation capacity of the aftertreatment device can be reduced under the condition that the temperature of the engine after vortex is lower, and the low-temperature performance of aftertreatment products can be improved; on the other hand, through rain-proof, can effectually prevent that rainwater from getting into aftertreatment device, avoid the rainwater to get into and cause the influence to carrier, catalyst, liner's performance.
The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalent changes and variations in the above-mentioned embodiments can be made by those skilled in the art without departing from the scope of the present invention.
Claims (3)
1. Tail gas aftertreatment device of rain-proof function of thermal-insulated heat preservation in area for tractor, its characterized in that includes: the tail gas post-treatment system comprises a post-treatment unit, a post-treatment V-shaped clamp and a post-treatment end vertebral canal, wherein the post-treatment unit is connected with the post-treatment end vertebral canal through the post-treatment V-shaped clamp; the heat insulation system is arranged outside the tail gas aftertreatment system and sequentially comprises a double-layer stainless steel knurling heat insulation device, a double-layer aluminum foil heat insulation device and an aftertreatment protective cover, wherein the double-layer stainless steel knurling heat insulation device is connected with an aftertreatment unit of the tail gas aftertreatment system through welding; the double-layer aluminum foil heat insulation device is wrapped on the double-layer stainless steel knurled heat insulation device, and the post-treatment protective cover is arranged on the outer side of the double-layer aluminum foil heat insulation device and is fixed on the base of the post-treatment unit; the rainproof system comprises an exhaust pipe, an exhaust pipe shield, a diversion cone and a rainproof cap at the top of the exhaust pipe, a rain collector between the exhaust pipe and the exhaust pipe shield, and a rainproof pipe connected to the exhaust pipe shield, wherein the rainproof system is connected with a post-treatment end cone pipe of the tail gas post-treatment system through the exhaust pipe, and the exhaust pipe shield of the rainproof system is connected with a post-treatment shield of the heat insulation system;
The exhaust pipe is arranged on the post-treatment end taper pipe and is fixed through an exhaust pipe hoop; the exhaust pipe shield is arranged on the outer side of the exhaust pipe and is connected with the aftertreatment shield through an exhaust pipe shield hoop; the end cone cover of the exhaust pipe protective cover is arranged on the exhaust pipe protective cover, and the rainproof pipe is arranged on the end cone cover of the exhaust pipe protective cover and is fixed through a rainproof pipe hoop;
the rain-proof cap is in a hollow cone shape, the diameter of the bottom of the cone is larger than the outer diameter of the exhaust pipe, the diversion cone is in a hollow cone shape, the diameter of the bottom of the cone is smaller than the inner diameter of the exhaust pipe, the cone angle of the diversion cone is downwards arranged in the top end of the exhaust pipe and is connected with the exhaust pipe through welding, the cone angle of the rain-proof cap is upwards covered on the top end of the exhaust pipe and is connected with the diversion cone through welding, and a plurality of exhaust holes are formed in the pipe wall of the exhaust pipe outside the diversion cone;
The inner side of the rain collector is connected with the exhaust pipe through welding, the outer side of the rain collector is connected with the exhaust pipe shield, the upper part of the rain collector is provided with an inclined conical surface, and the conical angle of the conical surface of the rain collector is the same as that of the diversion cone;
The rain-proof pipe comprises a first straight pipe section, a transition pipe section, a second straight pipe section and a rain-proof pipe section, wherein the axis of the first straight pipe section coincides with the axis of the exhaust pipe and is connected with a cone cover at the end of the exhaust pipe protective cover, the axis of the second straight pipe section is perpendicular to the axis of the exhaust pipe and is connected with the first straight pipe section through the transition section, the other end of the second straight pipe section is connected with the rain-proof pipe section, the pipe orifice of the rain-proof pipe section inclines, the pipe wall of the upper end of the rain-proof pipe section stretches out more than the pipe wall of the lower end of the rain-proof pipe section, and the pipe wall of the lower end of the rain-proof pipe section inclines downwards.
2. The tail gas aftertreatment device with the heat insulation and rainproof functions for the tractor, which is disclosed in claim 1, is characterized in that the double-layer stainless steel knurl heat insulation and preservation device comprises an outer stainless steel thin steel plate, an inner stainless steel thin steel plate and heat preservation cotton, wherein the heat preservation cotton is positioned between the outer stainless steel thin steel plate and the inner stainless steel thin steel plate, the outer stainless steel thin steel plate and the inner stainless steel thin steel plate are both provided with stainless steel knurl bulges, the knurl bulges face the direction away from the heat preservation cotton, the double-layer stainless steel knurl heat insulation and preservation device is fixed on a aftertreatment unit of the aftertreatment system in a welding mode, and the stainless steel knurl bulges on the inner stainless steel thin steel plate are contacted with the outer surface of the aftertreatment unit of the aftertreatment system.
3. The exhaust gas aftertreatment device with the heat insulation and rainproof function for the tractor according to claim 1, wherein the aftertreatment unit is composed of one or more packaging units of an oxidation catalytic converter DOC, a particle catcher DPF and a selective catalytic reduction device SCR, and when the aftertreatment unit is composed of more than two packaging units, the packaging units are connected together in a V-shaped clamp or flange connection mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010207409.6A CN111237040B (en) | 2020-03-23 | 2020-03-23 | Tail gas aftertreatment device with heat insulation and rainproof functions for tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010207409.6A CN111237040B (en) | 2020-03-23 | 2020-03-23 | Tail gas aftertreatment device with heat insulation and rainproof functions for tractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111237040A CN111237040A (en) | 2020-06-05 |
| CN111237040B true CN111237040B (en) | 2024-04-19 |
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| CN202010207409.6A Active CN111237040B (en) | 2020-03-23 | 2020-03-23 | Tail gas aftertreatment device with heat insulation and rainproof functions for tractor |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209040939U (en) * | 2018-10-15 | 2019-06-28 | 雷沃重工股份有限公司 | A kind of agricultural machinery exhaust elbow, tail-gas after treatment apparatus and farm machinery |
| CN212079441U (en) * | 2020-03-23 | 2020-12-04 | 洛阳拖拉机研究所有限公司 | Tractor is with tail gas aftertreatment device who takes thermal-insulated rain-proof function that keeps warm |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209040939U (en) * | 2018-10-15 | 2019-06-28 | 雷沃重工股份有限公司 | A kind of agricultural machinery exhaust elbow, tail-gas after treatment apparatus and farm machinery |
| CN212079441U (en) * | 2020-03-23 | 2020-12-04 | 洛阳拖拉机研究所有限公司 | Tractor is with tail gas aftertreatment device who takes thermal-insulated rain-proof function that keeps warm |
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