CN114151177A - Urea returns integrated overflow valve device of liquid - Google Patents
Urea returns integrated overflow valve device of liquid Download PDFInfo
- Publication number
- CN114151177A CN114151177A CN202111476429.4A CN202111476429A CN114151177A CN 114151177 A CN114151177 A CN 114151177A CN 202111476429 A CN202111476429 A CN 202111476429A CN 114151177 A CN114151177 A CN 114151177A
- Authority
- CN
- China
- Prior art keywords
- liquid return
- urea
- valve
- liquid
- valve body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 70
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000004202 carbamide Substances 0.000 title claims abstract description 47
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 abstract description 7
- 239000007924 injection Substances 0.000 abstract description 7
- 239000000243 solution Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- 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]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- 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
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses a urea liquid return integrated overflow valve device which comprises a liquid return connector, a liquid return valve body, a screw and a valve core, wherein one end of the liquid return connector is communicated with a urea tank in a fluid mode, the other end of the liquid return connector is connected with the liquid return valve body in a threaded mode to form a valve cavity, the liquid return valve body is installed on a pressure storage cavity of a urea pump, the screw is installed on the inner wall of the liquid return connector, and the valve core is connected with the screw through a spring to enable the valve core to float in the valve cavity. The urea returns integrated overflow valve device integrates parts such as a valve core and the like in the liquid return joint, and directly overflows redundant liquid back to the urea tank through the liquid return joint, so that the pressure in the urea pump is maintained stable, the pressure fluctuation is small, the injection precision of the urea pump is improved, the cost is low, the structure is simple and compact, and the requirement on post-treatment emission is met.
Description
Technical Field
The invention relates to the technical field of diesel engine tail gas aftertreatment, in particular to a urea return liquid integrated overflow valve device.
Background
Selective catalytic conversion (SCR) system for diesel engines refers to a system installed in the exhaust system of a diesel vehicle to catalytically reduce NOx in diesel engine emissions to N2And O2The catalytic reduction device of (3) selects an aqueous urea solution as the reducing agent. Aqueous urea solution is injected into the exhaust pipe upstream of the catalyst and is hydrolyzed to produce CO under the influence of the exhaust gas temperature and the gas flow2And ammonia gas, which is used as a reducing agent to reduce NOx into pollution-free nitrogen and water.
The urea solution supply pump is an essential important component in the SCR system, and the existing urea solution supply pump (for short, metering pump) for the SCR system is divided into an air urea solution supply pump and an air-free urea solution supply pump. The pressure of an internal pressure storage cavity of the airless urea solution supply pump greatly affects the injection precision, the pressure is unstable, the injection precision is deteriorated, the emission exceeds the standard, an after-treatment system alarms, and the engine is limited in torsion.
The above disadvantages seriously affect the stability of the airless SCR system, increase the after-sales service cost, and also affect the development of products and enterprises, and thus, a solution is urgently needed.
Disclosure of Invention
Based on the problems, the invention aims to provide a urea liquid return integrated overflow valve device, which optimizes the structure of the device and solves the problems of unstable pressure and poor injection precision of the existing urea pump.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an integrated overflow valve device of urea liquid return, its includes liquid return joint, liquid return valve body, screw rod and case, and the one end and the urea jar fluid intercommunication of liquid return joint, the other end and liquid return valve body threaded connection and form the valve pocket, and liquid return valve body installs on the pressure storage chamber of urea pump, and the screw rod is installed on the inner wall of liquid return joint, passes through spring coupling between case and the screw rod, makes the case float in the valve pocket.
Particularly, the valve core is conical, and the valve core is matched with the inner wall of the liquid return valve body through a conical surface.
In particular, a first O-ring is embedded in the surface of the valve spool.
Particularly, the screw rod is in threaded connection with the liquid return joint, and a second O-shaped ring is embedded in the surface of the screw rod.
Particularly, a third O-shaped ring is embedded between the liquid return joint and the liquid return valve body.
Particularly, a fourth O-shaped ring is embedded on the surface of the liquid return joint.
In particular, a fifth O-shaped ring is embedded on the surface of the liquid return valve body.
In conclusion, the urea return integrated overflow valve device has the advantages that the valve core and other parts are integrated inside the return joint, the redundant liquid directly overflows back to the urea tank through the return joint, the pressure stability in the urea pump is maintained, the pressure fluctuation is small, the injection precision of the urea pump is improved, the cost is low, the structure is simple and compact, and the requirement of post-treatment discharge is met.
Drawings
FIG. 1 is a schematic structural diagram of an integrated relief valve device for urea return liquid provided by an embodiment of the invention;
fig. 2 is an assembly view of a urea back-liquid integrated relief valve device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Referring to fig. 1 and fig. 2, the preferred embodiment provides an integrated overflow valve device for urea liquid return, which includes a liquid return joint 1, a liquid return valve body 2, a screw 3, and a valve core 4.
One end of the liquid return joint 1 is communicated with the fluid of the urea tank, the other end of the liquid return joint is in threaded connection with the liquid return valve body 2 to form a valve cavity, the liquid return valve body 2 is installed on a pressure storage cavity 11 of the urea pump, the screw rod 3 is installed on the inner wall of the liquid return joint 1, and the valve core 4 is connected with the screw rod 3 through the spring 5 to enable the valve core 4 to float in the valve cavity.
The valve core 4 is conical, and the valve core 4 is matched with the inner wall of the liquid return valve body 2 through a conical surface.
The surface of the valve core 4 is embedded with a first O-shaped ring 6.
The screw rod 3 is in threaded connection with the liquid return joint 1, and a second O-shaped ring 7 is embedded on the surface of the screw rod 3.
A third O-shaped ring 8 is embedded between the liquid return joint 1 and the liquid return valve body 2.
The surface of the liquid return joint 1 is embedded with a fourth O-shaped ring 9.
The surface of the liquid return valve body 2 is embedded with a fifth O-shaped ring 10.
During assembly, the second O-shaped ring 7 is firstly sleeved in a groove of the screw rod 3, the screw rod 3 is fixed on the liquid return connector 1 through threads, the first O-shaped ring 6 is sleeved in a groove of the valve core 4 and is installed in the liquid return valve body 2, one end of the spring 5 is sleeved on the valve core 4, the other end of the spring is sleeved on the screw rod 3, the third O-shaped ring 8 is sleeved on the liquid return valve body 2, the liquid return connector 1 is connected with the liquid return valve body 2 through threads, the fifth O-shaped ring 10 is sleeved on the liquid return valve body 2, the fourth O-shaped ring 9 is sleeved on the liquid return connector 1, and finally the integrated overflow valve device is fixed on a pressure storage cavity 11 of the urea pump through threads of the liquid return valve body 2.
In addition, when the urea pump normally works, redundant liquid overflows from the liquid return joint 1, so that the internal pressure of the urea pump is kept stable, the injection precision is improved, and the requirement of aftertreatment emission is finally met.
In conclusion, the urea return integrated overflow valve device integrates the valve core and other parts inside the return joint, and directly overflows the redundant liquid back to the urea tank through the return joint, so that the pressure in the urea pump is maintained stable, the pressure fluctuation is small, the injection precision of the urea pump is improved, the cost is low, and the structure is simple and compact, thereby meeting the requirement of post-treatment discharge.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but is capable of various modifications and changes without departing from the spirit and scope of the invention, which are intended to be within the scope of the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The urea liquid return integrated overflow valve device is characterized by comprising a liquid return connector, a liquid return valve body, a screw and a valve core, wherein one end of the liquid return connector is communicated with a urea tank in a fluid mode, the other end of the liquid return connector is in threaded connection with the liquid return valve body to form a valve cavity, the liquid return valve body is installed on a pressure storage cavity of a urea pump, the screw is installed on the inner wall of the liquid return connector, and the valve core is connected with the screw through a spring to enable the valve core to float in the valve cavity.
2. The urea return integrated overflow valve device of claim 1, wherein: the valve core is conical, and the valve core is matched with the inner wall of the liquid return valve body through a conical surface.
3. The urea return integrated overflow valve device of claim 1, wherein: and a first O-shaped ring is embedded on the surface of the valve core.
4. The urea return integrated overflow valve device of claim 1, wherein: the screw rod is in threaded connection with the liquid return joint, and a second O-shaped ring is embedded on the surface of the screw rod.
5. The urea return integrated overflow valve device of claim 1, wherein: and a third O-shaped ring is embedded between the liquid return joint and the liquid return valve body.
6. The urea return integrated overflow valve device of claim 1, wherein: and a fourth O-shaped ring is embedded on the surface of the liquid return joint.
7. The urea return integrated overflow valve device of claim 1, wherein: and a fifth O-shaped ring is embedded on the surface of the liquid return valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111476429.4A CN114151177A (en) | 2021-12-06 | 2021-12-06 | Urea returns integrated overflow valve device of liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111476429.4A CN114151177A (en) | 2021-12-06 | 2021-12-06 | Urea returns integrated overflow valve device of liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114151177A true CN114151177A (en) | 2022-03-08 |
Family
ID=80452661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111476429.4A Pending CN114151177A (en) | 2021-12-06 | 2021-12-06 | Urea returns integrated overflow valve device of liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114151177A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201795113U (en) * | 2009-10-21 | 2011-04-13 | 秦川机床集团宝鸡仪表有限公司 | Special SF6 gas valve |
| CN103953763A (en) * | 2014-05-21 | 2014-07-30 | 北京兴世华荣科技发展有限责任公司 | Sealing structure based on non-return stop valve |
| CN105715892A (en) * | 2016-05-05 | 2016-06-29 | 徐工集团工程机械股份有限公司 | Quick joint with pressure limit function |
| CN106382276A (en) * | 2016-10-08 | 2017-02-08 | 北京精密机电控制设备研究所 | Hydraulic locking device for flexible seal of conical surface |
| CN106931260A (en) * | 2017-03-31 | 2017-07-07 | 福建上润精密仪器有限公司 | A kind of pressure piping snap joint |
| CN208718762U (en) * | 2018-08-01 | 2019-04-09 | 凯龙高科技股份有限公司 | A kind of urea liquid feedway of no air auxiliary |
| CN208718764U (en) * | 2018-08-01 | 2019-04-09 | 凯龙高科技股份有限公司 | A kind of urea pump of no air auxiliary |
| CN110894886A (en) * | 2018-09-12 | 2020-03-20 | 杨海珍 | Highly-integrated one-way valve |
-
2021
- 2021-12-06 CN CN202111476429.4A patent/CN114151177A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201795113U (en) * | 2009-10-21 | 2011-04-13 | 秦川机床集团宝鸡仪表有限公司 | Special SF6 gas valve |
| CN103953763A (en) * | 2014-05-21 | 2014-07-30 | 北京兴世华荣科技发展有限责任公司 | Sealing structure based on non-return stop valve |
| CN105715892A (en) * | 2016-05-05 | 2016-06-29 | 徐工集团工程机械股份有限公司 | Quick joint with pressure limit function |
| CN106382276A (en) * | 2016-10-08 | 2017-02-08 | 北京精密机电控制设备研究所 | Hydraulic locking device for flexible seal of conical surface |
| CN106931260A (en) * | 2017-03-31 | 2017-07-07 | 福建上润精密仪器有限公司 | A kind of pressure piping snap joint |
| CN208718762U (en) * | 2018-08-01 | 2019-04-09 | 凯龙高科技股份有限公司 | A kind of urea liquid feedway of no air auxiliary |
| CN208718764U (en) * | 2018-08-01 | 2019-04-09 | 凯龙高科技股份有限公司 | A kind of urea pump of no air auxiliary |
| CN110894886A (en) * | 2018-09-12 | 2020-03-20 | 杨海珍 | Highly-integrated one-way valve |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220308 |
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