WO2019028944A1 - 内置式尿素供给装置 - Google Patents

内置式尿素供给装置 Download PDF

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Publication number
WO2019028944A1
WO2019028944A1 PCT/CN2017/099317 CN2017099317W WO2019028944A1 WO 2019028944 A1 WO2019028944 A1 WO 2019028944A1 CN 2017099317 W CN2017099317 W CN 2017099317W WO 2019028944 A1 WO2019028944 A1 WO 2019028944A1
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Prior art keywords
built
supply device
plug
filter element
urea supply
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PCT/CN2017/099317
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English (en)
French (fr)
Inventor
薛运峰
龚超
林魁
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天纳克（苏州）排放系统有限公司
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Publication of WO2019028944A1 publication Critical patent/WO2019028944A1/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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1426—Filtration means

Definitions

  • the invention relates to a built-in urea supply device, belonging to the technical field of engine exhaust aftertreatment.
  • the Chinese invention patent CN103261607B published on May 11, 2016, discloses a built-in urea supply device comprising a base and a filter laid on the base.
  • the filter cannot be disassembled, the entire urea supply device can only be replaced later, and the filter cannot be replaced only, and the replacement cost is high; on the other hand, since the filter is tiled on the base
  • the filter capacity of the filter is limited by the volume of the base and cannot cover small volume applications.
  • a built-in urea supply device including a base and a pump assembly mounted on the base, the base being provided with a liquid outlet joint, a first plug, and the a second plug in communication with the first plug, the pump assembly being in communication with the second plug to draw in a low pressure urea solution, and after pressurizing, outputting a high pressure urea solution from the tap connector;
  • the urea supply device further includes a filter detachably mounted on the base and surrounding the periphery of the pump assembly, the filter including an outer filter element, an inner filter element, and the outer filter element and the inner filter element An annular cavity, wherein the first plug is in communication with the annular cavity.
  • the filter includes a skeleton supporting the outer filter element and the inner filter element, the skeleton includes a top wall that closes a top portion of the annular cavity, and is located in the annular cavity The bottom wall of the bottom.
  • the bottom wall is provided with an opening that cooperates with the first plug.
  • the skeleton further includes a ridge protruding inward from the inner filter element, and the opening is located on the ridge.
  • the base is provided with a mounting surface for mounting the filter, and the bottom wall branch Supported on the mounting surface.
  • the pump assembly is provided with a bypass path in communication with the liquid discharge joint to open the bypass passage for pressure relief when the outlet pressure is too high.
  • the base is provided with an outwardly extending mounting flange for mounting the built-in urea supply device to the bottom of the urea tank.
  • the first plug is sleeved with a first sealing ring to seal the opening; the second plug is sleeved with a second sealing ring to seal with the pump assembly. .
  • the filter extends upward beyond the pump assembly.
  • the present invention facilitates replacement by providing a detachable filter.
  • the filter capacity of the filter is improved by providing the outer filter element and the inner filter element.
  • Figure 1 is a perspective view of a built-in urea supply device of the present invention.
  • Figure 2 is a plan view of Figure 1.
  • Figure 3 is a partial exploded perspective view of Figure 1.
  • Figure 4 is a perspective view of the filter of Figure 3.
  • Figure 5 is a perspective view of the filter skeleton of Figure 4.
  • Figure 6 is a perspective cross-sectional view of the filter of Figure 4.
  • Figure 7 is a schematic cross-sectional view showing the built-in urea supply device of the present invention installed in a urea tank.
  • Figure 8 is a cross-sectional view showing the built-in urea supply device of the present invention installed at another angle in the urea tank.
  • the present invention discloses a built-in urea supply device 100 comprising a base 1, a pump assembly 2 mounted on the base 1, and a detachably mounted on the base 1. And a filter 3 surrounding the periphery of the pump assembly 2.
  • the base 1 is provided with a liquid outlet joint 10, a first plug 11 and a second plug 12 communicating with the first plug 11.
  • the liquid outlet joint 10 is located on the side, and the first plug 11 and the second plug 12 are located on the top surface.
  • the base 1 is provided with a mounting surface 13 for mounting the filter 3 and an outwardly extending mounting flange 14 for mounting the built-in urea supply device 100 to the bottom of the urea tank 200.
  • the pump assembly 2 is in communication with the second plug 12 to draw in a low pressure urea solution, and after pressurization, a high pressure urea solution is output from the tap connector 10 to a nozzle (not shown).
  • the pump assembly 2 is provided with a bypass path 21 communicating with the liquid outlet joint 10 to open the bypass passage 21 for pressure relief when the outlet pressure is too high.
  • the filter 3 extends upward beyond the pump assembly 2.
  • the detachable filter 3 facilitates subsequent maintenance and replacement, saving costs.
  • the filter 3 includes an outer filter element 31, an inner filter element 32, a skeleton 33 supporting the outer filter element 31 and the inner filter element 32, and an annular cavity 30 between the outer filter element 31 and the inner filter element 32.
  • the first plug 11 is in communication with the annular cavity 30.
  • the filter capacity of the filter 3 can be improved by providing a double-layered filter element.
  • the skeleton 33 includes a top wall 331 that closes the top of the annular cavity 30 and a bottom wall 332 that is located at the bottom of the annular cavity 30. Referring to FIG. 7, the bottom wall 332 is provided with an opening 333 that cooperates with the first plug 11.
  • the first plug 11 is sleeved with a first sealing ring 111 to seal the opening 333; the second plug 12 is sleeved with a second sealing ring 121 for sealing with the pump assembly 2.
  • the bottom wall 332 is supported on the mounting surface 13.
  • the skeleton 33 further includes a rib 34 that projects inwardly of the inner filter element 32, and the opening 333 is located on the ridge 34.
  • the width of the ribs 34 may not be limited by the annular cavity 30, thereby facilitating the arrangement of the openings 333.
  • the urea solution in the urea tank 200 passes through the filtration of the outer filter element 31 and the inner filter element 32, and then enters the annular cavity 30, and then passes through the first plug 11 and the second plug 12. It is delivered to the pump assembly 2, pressurized by the pump assembly 2, and then output through the liquid outlet joint 10; when the outlet pressure is too high, the bypass passage 21 is opened for pressure relief to achieve pressure regulation.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

一种内置式尿素供给装置，其包括底座（1）以及安装在所述底座（1）上的泵组件（2）。所述底座（1）设有出液接头（10）、第一插头（11）以及与所述第一插头（11）相连通的第二插头（12）。所述泵组件（2）与所述第二插头（12）连通以吸入低压的尿素溶液，并经过加压之后将高压的尿素溶液自所述出液接头（10）输出。所述内置式尿素供给装置还包括可拆卸地安装在所述底座（1）上且围绕在所述泵组件（2）外围的滤清器（3）。所述滤清器（3）包括外侧滤芯（31）、内侧滤芯（32）以及位于所述外侧滤芯（31）与所述内侧滤芯（32）之间的环形腔体（30），其中所述第一插头（11）与所述环形腔体（30）相连通。通过设置可拆卸的滤清器（3），便于其更换。另外，通过设置外侧滤芯（31）与内侧滤芯（32），提高了滤清器（3）的过滤能力。

Description

内置式尿素供给装置
本申请要求了申请日为2017年8月11日、申请号为201710686133.2、发明名称为“内置式尿素供给装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种内置式尿素供给装置，属于发动机排气后处理技术领域。
背景技术
2016年5月11日公告的中国发明专利CN103261607B揭示了一种内置式尿素供给装置，其包括底座以及平铺在所述底座上的过滤器。然而这种设计一方面由于过滤器无法拆卸，后续只能就整个尿素供给装置进行更换而无法仅对过滤器进行更换，更换成本较高；另一方面，由于过滤器是平铺在所述底座上的，因此过滤器的过滤能力受限于底座的体积，无法覆盖小体积的应用。
因此，有必要提供一种新型的解决方案以解决上述技术难题。
发明内容
本发明的目的在于提供一种过滤能力较强且滤清器可拆卸的内置式尿素供给装置。
为实现上述目的，本发明采用如下技术方案：一种内置式尿素供给装置，其包括底座以及安装在所述底座上的泵组件，所述底座设有出液接头、第一插头以及与所述第一插头相连通的第二插头，所述泵组件与所述第二插头连通以吸入低压的尿素溶液，并经过加压之后将高压的尿素溶液自所述出液接头输出；所述内置式尿素供给装置还包括可拆卸地安装在所述底座上且围绕在所述泵组件外围的滤清器，所述滤清器包括外侧滤芯、内侧滤芯以及位于所述外侧滤芯与所述内侧滤芯之间的环形腔体，其中所述第一插头与所述环形腔体相连通。
作为本发明进一步改进的技术方案，所述滤清器包括支撑所述外侧滤芯与所述内侧滤芯的骨架，所述骨架包括封闭所述环形腔体的顶部的顶壁以及位于所述环形腔体的底部的底壁。
作为本发明进一步改进的技术方案，所述底壁设有与所述第一插头相配合的开孔。
作为本发明进一步改进的技术方案，所述骨架还包括向内凸出所述内侧滤芯的凸条，所述开孔位于所述凸条上。
作为本发明进一步改进的技术方案，所述底座设有用以安装所述滤清器的安装面，所述底壁支 撑在所述安装面上。
作为本发明进一步改进的技术方案，所述泵组件设有与所述出液接头相连通的旁通路径，以在出口压力过高时将该旁通路径打开进行泄压。
作为本发明进一步改进的技术方案，所述底座设有向外延伸的安装凸缘，用以将所述内置式尿素供给装置安装至尿素箱的底部。
作为本发明进一步改进的技术方案，所述第一插头上套接有第一密封圈，以密封所述开孔；所述第二插头上套接有第二密封圈，以与泵组件进行密封。
作为本发明进一步改进的技术方案，所述滤清器向上延伸超过所述泵组件。
相较于现有技术，本发明通过设置可拆卸的滤清器，便于其更换。另外，通过设置外侧滤芯与内侧滤芯，提高了滤清器的过滤能力。
附图说明
图1是本发明内置式尿素供给装置的立体示意图。
图2是图1的俯视图。
图3是图1的部分立体分解图。
图4是图3中滤清器的立体示意图。
图5是图4中滤清器骨架的立体示意图。
图6是图4中滤清器的立体剖面图。
图7是本发明内置式尿素供给装置安装于尿素箱中的剖面示意图。
图8是本发明内置式尿素供给装置安装于尿素箱中于另一角度的剖面示意图。
具体实施方式
请参图1至图8所示，本发明揭示了一种内置式尿素供给装置100，其包括底座1、安装在所述底座1上的泵组件2以及可拆卸地安装在所述底座1上且围绕在所述泵组件2外围的滤清器3。
所述底座1设有出液接头10、第一插头11以及与所述第一插头11相连通的第二插头12。在本发明图示的实施方式中，所述出液接头10位于侧面，所述第一插头11以及第二插头12位于顶面。所述底座1设有用以安装所述滤清器3的安装面13以及向外延伸的安装凸缘14用以将所述内置式尿素供给装置100安装至尿素箱200的底部。
所述泵组件2与所述第二插头12连通以吸入低压的尿素溶液，并经过加压之后将高压的尿素溶液自所述出液接头10输出到喷嘴处(未图示)。请参图8所示，所述泵组件2设有与所述出液接头10相连通的旁通路径21，以在出口压力过高时将该旁通路径21打开进行泄压。
所述滤清器3向上延伸超过所述泵组件2。可拆卸的滤清器3便于了后续的维护与更换，节省了成本。所述滤清器3包括外侧滤芯31、内侧滤芯32、支撑所述外侧滤芯31与所述内侧滤芯32的骨架33以及位于所述外侧滤芯31与所述内侧滤芯32之间的环形腔体30，其中所述第一插头11与所述环形腔体30相连通。通过设置双层的滤芯，可以提高滤清器3的过滤能力。所述骨架33包括封闭所述环形腔体30的顶部的顶壁331以及位于所述环形腔体30的底部的底壁332。请参图7所示，所述底壁332设有与所述第一插头11相配合的开孔333。所述第一插头11上套接有第一密封圈111，以密封所述开孔333；所述第二插头12上套接有第二密封圈121，以与泵组件2进行密封。所述底壁332支撑在所述安装面13上。
所述骨架33还包括向内凸出所述内侧滤芯32的凸条34，所述开孔333位于所述凸条34上。如此设置，凸条34的宽度可以不受环形腔体30的限制，从而有利于开孔333的布置。
请参图7及图8中的箭头所示，尿素箱200中的尿素溶液经过外侧滤芯31与内侧滤芯32的过滤之后进入到环形腔体30中，然后通过第一插头11以及第二插头12输送到泵组件2中，经过泵组件2的加压，再通过出液接头10输出；当出口压力过高时将该旁通路径21打开进行泄压，以实现压力调节。
另外，以上实施例仅用于说明本发明而并非限制本发明所描述的技术方案，对本说明书的理解应该以所属技术领域的技术人员为基础，尽管本说明书参照上述的实施例对本发明已进行了详细的说明，但是，本领域的普通技术人员应当理解，所属技术领域的技术人员仍然可以对本发明进行修改或者等同替换，而一切不脱离本发明的精神和范围的技术方案及其改进，均应涵盖在本发明的权利要求范围内。

Claims (9)

  1. 一种内置式尿素供给装置，其包括底座以及安装在所述底座上的泵组件，其特征在于：所述底座设有出液接头、第一插头以及与所述第一插头相连通的第二插头，所述泵组件与所述第二插头连通以吸入低压的尿素溶液，并经过加压之后将高压的尿素溶液自所述出液接头输出；所述内置式尿素供给装置还包括可拆卸地安装在所述底座上且围绕在所述泵组件外围的滤清器，所述滤清器包括外侧滤芯、内侧滤芯以及位于所述外侧滤芯与所述内侧滤芯之间的环形腔体，其中所述第一插头与所述环形腔体相连通。
  2. 如权利要求1所述的内置式尿素供给装置，其特征在于：所述滤清器包括支撑所述外侧滤芯与所述内侧滤芯的骨架，所述骨架包括封闭所述环形腔体的顶部的顶壁以及位于所述环形腔体的底部的底壁。
  3. 如权利要求2所述的内置式尿素供给装置，其特征在于：所述底壁设有与所述第一插头相配合的开孔。
  4. 如权利要求3所述的内置式尿素供给装置，其特征在于：所述骨架还包括向内凸出所述内侧滤芯的凸条，所述开孔位于所述凸条上。
  5. 如权利要求2所述的内置式尿素供给装置，其特征在于：所述底座设有用以安装所述滤清器的安装面，所述底壁支撑在所述安装面上。
  6. 如权利要求1所述的内置式尿素供给装置，其特征在于：所述泵组件设有与所述出液接头相连通的旁通路径，以在出口压力过高时将该旁通路径打开进行泄压。
  7. 如权利要求1所述的内置式尿素供给装置，其特征在于：所述底座设有向外延伸的安装凸缘，用以将所述内置式尿素供给装置安装至尿素箱的底部。
  8. 如权利要求3所述的内置式尿素供给装置，其特征在于：所述第一插头上套接有第一密封圈，以密封所述开孔；所述第二插头上套接有第二密封圈，以与泵组件进行密封。
  9. 如权利要求1所述的内置式尿素供给装置，其特征在于：所述滤清器向上延伸超过所述泵 组件。
PCT/CN2017/099317 2017-08-11 2017-08-28 内置式尿素供给装置 WO2019028944A1 (zh)

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