WO2022007516A1 - 一种提高箱式后处理氮氧化合物测点准确性的结构 - Google Patents

一种提高箱式后处理氮氧化合物测点准确性的结构 Download PDF

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WO2022007516A1
WO2022007516A1 PCT/CN2021/095407 CN2021095407W WO2022007516A1 WO 2022007516 A1 WO2022007516 A1 WO 2022007516A1 CN 2021095407 W CN2021095407 W CN 2021095407W WO 2022007516 A1 WO2022007516 A1 WO 2022007516A1
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box
cavity
square
square partition
nitrogen oxide
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PCT/CN2021/095407
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English (en)
French (fr)
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林浩健
段一军
曲洪亮
郭一博
徐超
胡忠斌
郑天峰
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无锡威孚力达催化净化器有限责任公司
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Publication of WO2022007516A1 publication Critical patent/WO2022007516A1/zh

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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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
    • 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention belongs to the technical field of diesel engine exhaust gas treatment systems, and in particular relates to a structure for improving the accuracy of box-type post-treatment nitrogen oxide measuring points.
  • the object of the present invention is to overcome the deficiencies in the prior art, solve the problem that the existing nitrogen oxides (NOx) are unstable in detection and cause the discharge to exceed the standard, and provide a simple structure and easy to use. Compound Spot Accuracy Structure.
  • a structure for improving the accuracy of a box-type post-processing nitrogen oxide compound measurement point includes a box body, and a box-type purification module is arranged in the box-type purification module, characterized in that: the box-type purification module is provided with a front square bulkhead and rear square bulkhead,
  • a front cavity is formed between the front space of the front square partition and the box, and a front exhaust temperature sensor base is arranged inside the front cavity.
  • the box body at the front end of the front cavity is provided with a front square end cover, an air intake pipe is connected to the front square end cover, and a urea nozzle base is arranged on the outer wall of the air intake pipe; the front square partition plate is connected to the rear square partition plate.
  • the space between the plates forms an intermediate cavity, and a carrier assembly and a spoiler are arranged in the intermediate cavity;
  • the two ends of the spoiler are respectively connected under the front square partition and the rear square partition, a mixing tube is arranged above the spoiler, one end of the mixing tube is arranged on the rear square partition, and the other end passes through the front square end After the cover is connected with the intake pipe;
  • a rear cavity is formed between the rear space of the rear square partition and the box body, and a rear square end cover is provided at the end of the box body corresponding to the rear cavity, and the rear square end cover is connected with an air outlet;
  • the rear cavity is distributed with a draft airflow block, a rear exhaust temperature sensor base and a nitrogen oxygen sensor base, wherein the rear exhaust temperature sensor base and the nitrogen oxygen sensor base are vertically spaced apart, and the draft airflow block is closely arranged on the carrier assembly. the outlet end.
  • a plurality of circular through holes of different sizes are respectively arranged on the front square partition plate to be supported in the box body.
  • the outer circle of the tail of the mixing tube is provided with a notch groove, the notch groove occupies 1/2 of the outer circle of the tail of the mixing tube, the groove depth is 20 ⁇ 1mm, and the outer circle of the mixing tube is evenly spaced with a plurality of through holes;
  • the through holes start at 12mm from the rear end of the notch groove, and a plurality of through holes are evenly spaced and evenly arranged to support the mixing tube between the front square partition and the rear square partition.
  • the spoiler is a circular arc plate of R214, and the two ends are respectively supported on the front square partition plate and the rear square partition plate.
  • both ends of the air-inducing air blocking bar are provided with air flow grooves, the air-flow grooves have a 90° angle and a bending angle ⁇ , and the air-inducing air blocking bars are arranged in close contact with the air outlet end of the carrier assembly.
  • the structure is simple, compact and reasonable, so that the nitrogen oxides (NOx) after the ammonia gas and the exhaust gas are fully mixed can be reasonably detected, and the emission standard of the box-type after-treatment is greatly improved.
  • NOx nitrogen oxides
  • FIG. 1 is a front view of the structure of the present invention.
  • FIG. 2 is a schematic diagram of the three-dimensional structure of the present invention.
  • FIG. 3 is a schematic diagram of the three-dimensional structure of the air-induction blocking bar of the present invention.
  • FIG. 4 is a top view of FIG. 3 .
  • FIG. 5 is a left side view of FIG. 4 .
  • FIG. 6 is a schematic diagram of the structure of the draft air blocking bar of the present invention placed on the carrier assembly.
  • a structure for improving the accuracy of box-type post-processing nitrogen oxide measurement points including a box body 7, a box-type purification module 9 is arranged in the box, and a box-type purification module 9 is arranged inside the box-type purification module 9.
  • a front cavity 4 is formed between the front space of the front square partition 8 and the box body 7, and a front exhaust temperature sensor base 5 is arranged inside the front cavity 4.
  • the box body 7 at the front end of the front cavity 4 is provided with a front square end cover 6, the front square end cover 6 is connected with an air intake pipe 1, and the outer wall of the air intake pipe is provided with a urea nozzle base 2; the front square partition plate The space between 8 and the rear square partition 11 forms an intermediate cavity 10, and the intermediate cavity 10 is provided with a carrier assembly 18 and a spoiler 19;
  • the spoiler 19 is a circular arc plate of R214, and the two ends are respectively supported on the front square partition plate 8 and the rear square partition plate 11 .
  • a mixing pipe 3 is arranged above the spoiler 19, one end of the mixing pipe is arranged on the rear square partition plate 11, and the other end passes through the front square end cover 6 and is connected to the air intake pipe 1;
  • a rear cavity 16 is formed between the rear space of the rear square partition 11 and the box body 7 , and a rear square end cover 12 is provided at the end of the box body 7 corresponding to the rear cavity, which is connected to the rear square end cover 12 Outlet pipe 17;
  • the rear cavity 16 is distributed with a draft airflow block 14, a rear exhaust temperature sensor base 13 and a nitrogen oxygen sensor base 15, wherein the rear exhaust temperature sensor base 13 and the nitrogen oxygen sensor base 15 are vertically spaced apart.
  • the airflow blocking bar 14 is closely arranged on the air outlet end of the carrier assembly 18 .
  • Air flow grooves 14a are provided at both ends of the induced airflow blocking bar 14, and the airflow groove has a 90° angle and a bending angle ⁇ .
  • a plurality of circular through holes 8 a of different sizes are respectively set on the front square partition plate 8 to be supported in the box body 7 .
  • Circular through holes of different sizes include ⁇ 40, ⁇ 45, ⁇ 50 and ⁇ 60 circular through holes 8a.
  • the outer circumference of the rear of the mixing tube 3 is provided with a notch groove 3a, the notch groove 3a occupies 1/2 of the outer circumference of the rear of the mixing tube, the groove depth is 20 ⁇ 1mm, and the outer circumference of the mixing tube 3 is provided with a plurality of through holes 3b evenly spaced;
  • the through holes 3b start at 12 mm from the rear end of the notch groove 3a, and a plurality of through holes are evenly spaced and evenly arranged to support the mixing tubes between the front square partition plate 8 and the rear square partition plate 11 .
  • the nitrogen-oxygen sensor base 15 is inserted into the nitrogen-oxygen sensor to detect the gas coming out of the carrier assembly 18 and flows out from the airflow grooves 14a at both ends through the air-bleed baffles 14.
  • the nitrogen-oxygen sensor detection probe can accurately detect nitrogen-oxygen compounds after receiving the continuous and stable gas. data.
  • the post-processing air inlet 1 is connected to the exhaust pipe of the automobile engine, and the urea solution is sprayed into the urea nozzle base 2 on the air inlet 1 and diffused to the spoiler 19, the intermediate cavity 10,
  • the front square baffle 8 and the front cavity 4 form a mixed gas, and the mixed gas passes through the carrier assembly 18 and is shunted out from the airflow grooves 14a at both ends of the air bleed baffle 14.
  • the nitrogen-oxygen sensor probe fixed on the nitrogen-oxygen sensor base 15 detects the flow from the gas
  • the gas from the groove 14a diffuses into the rear cavity 16 and is discharged through the gas outlet pipe 17, eliminating the harmful components of the diesel engine and reducing nitrogen oxides to nitrogen and water.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

一种提高箱式后处理氮氧化合物测点准确性的结构，包括箱体（7），箱体（7）内设置有箱式净化模块（9），箱式净化模块（9）内部设置有前方形隔板（8）和后方形隔板（11），前方形隔板（8）前空间与箱体（7）之间形成前腔体（4），前腔体（4）内部设置有前排温传感器底座（5），前腔体（4）前端处的箱体（7）上设有前方形端盖（6），前方形端盖（6）上连接有进气管（1），进气管（1）外壁上设置有尿素喷嘴底座（2）；前方形隔板（6）与后方形隔板（11）之间的空间形成中间腔体（10），中间腔体（10）内设置有载体组件（18）和扰流板（19）；扰流板（19）上方设置有混合管（3），后腔体（16）对应的箱体（7）末端设有后方形端盖（12），后方形端盖（12）上连接出气管（17）。该装置结构简单、紧凑、合理，能够使氨气和尾气充分混合，同时极大的提高了氮氧化合物测点准确性，保证了尾气排放的氮氧化合物达标。

Description

一种提高箱式后处理氮氧化合物测点准确性的结构 技术领域
本发明属于柴油机尾气处理系统技术领域，具体涉及一种提高箱式后处理氮氧化合物测点准确性的结构。
背景技术
随着柴油机技术的发展，消除柴油机排气中氮氧化物的主要后处理技术之一。尿素水溶液通过尿素喷嘴喷入后处理中，在足够的温度内发生热解反应，产生所需的还原剂氨气(NH3)，氨气在催化剂载体的作用下在SCR后处理内与尾气中的氮氧化物(NOx)反应，达到消除柴油机有害排放物氮氧化物(NOx)的目的。而箱式后处理中SCR后腔体由于空间大，气流流速不稳定导致氮氧化物(NOx)检测不稳定而引起的排放超标。
发明内容
本发明的目的在于克服现有技术中存在的不足，解决现有氮氧化物(NOx)检测不稳定引起排放超标问题，提供了一种结构简单，使用方便的一种提高箱式后处理氮氧化合物测点准确性结构。
具体的，一种提高箱式后处理氮氧化合物测点准确性的结构，包括箱体，所述箱体内设置有箱式净化模块，其特征在于：所述箱式净化模块内部设置有前方形隔板和后方形隔板，
所述前方形隔板前空间与箱体之间形成前腔体，前腔体内部设置有前排温传感器底座，
所述前腔体前端处的箱体上设有前方形端盖，所述前方形端盖上连接有进气管，进气管外壁上设置有尿素喷嘴底座；所述前方形隔板与后方形隔板之间的空间形成中间腔体，所述中间腔体内设置有载体组件和扰流板；
其中扰流板的两端分别连接在前方形隔板和后方形隔板下方，扰流板上方设置有混合管，所述混合管一端设置在后方形隔板上，另一端穿过前方形端盖后与进气管接通；
后方形隔板后部空间与箱体之间形成后腔体，后腔体对应的箱体末端设有后方形端盖，所述后方形端盖上连接出气管；
所述后腔体内分布有引气流挡条、后排温传感器底座和氮氧传感器底座，其中后排温传感器底座和氮氧传感器底座竖向间隔排布，引气流挡条紧贴设置在载体组件的出气端。
进一步地，所述前方形隔板上分别设置多个不同尺寸的圆形通孔支撑在箱体里面。
进一步地，所述混合管尾部外圆设置有缺口槽，缺口槽占混合管尾部外圆的1/2，槽深20±1mm，混合管外圆均匀间隔设置有多个通孔；
其中通孔起始于缺口槽后端12mm处，多个通孔呈等间距均匀排布支撑在前方形隔板和后方形隔板之间的混合管。
进一步地，扰流板为R214的圆弧板，两端分别支撑在前方形隔板和后方形隔板上。
进一步地，所述引气流挡条两端设置有气流槽，气流槽具有90°，折弯角α，引气流挡条紧贴设置在载体组件出气端设置。
有益效果：
本结构简单、紧凑、合理，能够使氨气和尾气充分混合后的氮氧化物(NOx)合理的进行检测，极大地提高了箱式后处理的排放达标。
附图说明
图1为本发明的结构主视图。
图2为本发明的立体结构示意图。
图3为本发明的引气流挡条立体结构示意图。
图4为图3的俯视图。
图5为图4的左视图。
图6为本发明的引气流挡条放置在载体组件上的结构示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明公共的实施方式作进一步详细描述。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
此外，在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
如图1-6所示：一种提高箱式后处理氮氧化合物测点准确性的结构，包括箱体7，所述箱体内设置有箱式净化模块9，箱式净化模块9内部设置有前方形隔板8和后方形隔板11，
前方形隔板8前空间与箱体7之间形成前腔体4，所述前腔体4内部设置有前排温传感器底座5，
前腔体4前端处的箱体7上设有前方形端盖6，所述前方形端盖6上连接有进气管1，进气管外壁上设置有尿素喷嘴底座2；所述前方形隔板8与后方形隔板11之间的空间形成中间腔体10，所述中间腔体10内设置有载体组件18和扰流板19；
如图2所示，扰流板19为R214的圆弧板，两端分别支撑在前方形隔板8和后方形隔板11上。
扰流板19上方设置有混合管3，所述混合管一端设置在后方形隔板11上，另一端穿过前方形端盖6后与进气管1接通；
所述后方形隔板11后部空间与箱体7之间形成后腔体16，所述后腔体对应的箱体7末端设有后方形端盖12，所述后方形端盖12上连接出气管17；
所述后腔体16内分布有引气流挡条14、后排温传感器底座13和氮氧传感器底座15，其中后排温传感器底座13和氮氧传感器底座15竖向间隔排布，所述引气流挡条14紧贴设置在 载体组件18的出气端。引气流挡条14两端设置有气流槽14a，气流槽具有90°，折弯角α，引气流挡条14紧贴设置在载体组件18出气端设置。
前方形隔板8上分别设置多个不同尺寸的圆形通孔8a支撑在箱体7里面。不同尺寸的圆形通孔包括φ40、φ45、φ50和φ60圆形通孔8a。
混合管3尾部外圆设置有缺口槽3a，缺口槽3a占混合管尾部外圆的1/2，槽深20±1mm，混合管3外圆均匀间隔设置有多个通孔3b；
其中通孔3b起始于缺口槽3a后端12mm处，多个通孔呈等间距均匀排布支撑在前方形隔板8和后方形隔板11之间的混合管。
氮氧传感器底座15插入氮氧传感器探测经过载体组件18出来的气体通过引气流挡条14从两端的气流槽14a流出，氮氧传感器检测探头接收到持续稳定的气体后能准确的检测氮氧化合物数据。
具体使用时，将后处理进气口1与汽车发动机的排气管相连接，进气口1上尿素喷嘴底座2喷入尿素溶液经过混合管3扩散至扰流板19、中间腔体10、前方形隔板8、前腔体4形成混合气体，混合气体经过载体组件18后从引气流挡条14两端的气流槽14a分流出，固定在氮氧传感器底座15的氮氧传感器探头检测从气流槽14a出来的气体后扩散至后腔体16后通过出气管17排出来，消除柴油机有害成分氮氧化物还原为氮气和水。
以上所述，仅是本发明的较佳实施例，并非对本发明作任何限制。凡是根据本发明实质对以上实施例所作的任何简单修改、变更以及等效变化，均仍属于本发明技术方案的保护范围内。

Claims (5)

  1. 一种提高箱式后处理氮氧化合物测点准确性的结构，包括箱体(7)，所述箱体内设置有箱式净化模块(9)，其特征在于：所述箱式净化模块(9)内部设置有前方形隔板(8)和后方形隔板(11)，
    所述前方形隔板(8)前空间与箱体(7)之间形成前腔体(4)，所述前腔体(4)内部设置有前排温传感器底座(5)，
    所述前腔体(4)前端处的箱体(7)上设有前方形端盖(6)，所述前方形端盖(6)上连接有进气管(1)，进气管(1)外壁上设置有尿素喷嘴底座(2)；所述前方形隔板(8)与后方形隔板(11)之间的空间形成中间腔体(10)，所述中间腔体(10)内设置有载体组件(18)和扰流板(19)；
    其中扰流板(19)的两端分别连接在前方形隔板(8)和后方形隔板(11)下方，扰流板(19)上方设置有混合管(3)，所述混合管一端设置在后方形隔板(11)上，另一端穿过前方形端盖(6)后与进气管(1)接通；
    所述后方形隔板(11)后部空间与箱体(7)之间形成后腔体(16)，所述后腔体对应的箱体(7)末端设有后方形端盖(12)，所述后方形端盖(12)上连接出气管(17)；
    所述后腔体(16)内分布有引气流挡条(14)、后排温传感器底座(13)和氮氧传感器底座(15)，其中后排温传感器底座(13)和氮氧传感器底座(15)竖向间隔排布，所述引气流挡条(14)紧贴设置在载体组件(18)的出气端。
  2. 如权利要求1所述的一种提高箱式后处理氮氧化合物测点准确性的结构，其特征在于：所述前方形隔板(8)上分别设置多个不同尺寸的圆形通孔(8a)支撑在箱体(7)里面。
  3. 如权利要求1所述的一种提高箱式后处理氮氧化合物测点准确性的结构，其特征在于：
    所述混合管(3)尾部外圆设置有缺口槽(3a)，缺口槽(3a)占混合管尾部外圆的1/2，槽深20±1mm，混合管(3)外圆均匀间隔设置有多个通孔(3b)；
    其中通孔(3b)起始于缺口槽(3a)后端12mm处，多个通孔呈等间距均匀排布支撑在前方形隔板(8)和后方形隔板(11)之间的混合管。
  4. 如权利要求1所述的一种提高箱式后处理氮氧化合物测点准确性的结构，其特征在于：所述扰流板(19)为R214的圆弧板，两端分别支撑在前方形隔板(8)和后方形隔板(11)上。
  5. 如权利要求2所述的一种提高箱式后处理氮氧化合物测点准确性的结构，其特征在于：所述引气流挡条(14)两端设置有气流槽(14a)，气流槽具有90°，折弯角α，引气流挡条(14)紧贴设置在载体组件(18)出气端设置。
PCT/CN2021/095407 2020-07-07 2021-05-24 一种提高箱式后处理氮氧化合物测点准确性的结构 WO2022007516A1 (zh)

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