CN205225391U - Prevent frozen structure that causes damage of interior liquid of pump in SCR system - Google Patents
Prevent frozen structure that causes damage of interior liquid of pump in SCR system Download PDFInfo
- Publication number
- CN205225391U CN205225391U CN201520948496.5U CN201520948496U CN205225391U CN 205225391 U CN205225391 U CN 205225391U CN 201520948496 U CN201520948496 U CN 201520948496U CN 205225391 U CN205225391 U CN 205225391U
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- China
- Prior art keywords
- pressure transducer
- pump
- scr system
- throughput
- damage
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- 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
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a prevent frozen structure that causes damage of interior liquid of pump in SCR system, which comprises a pump body, the upper portion of a side of the pump body is equipped with the pressure sensor installation cavity, is equipped with pressure sensor liquid inlet flow channel in this pump body, still be equipped with a liquid inlet channel with the sprue of SCR system concatenates on the pump body, liquid inlet channel level setting, liquid inlet channel entry is outwards tubaeform of opening be equipped with the recess on the inner wall of liquid inlet channel entry, the recess is embedded to be equipped with first elastomer. A prevent frozen structure that causes damage of interior liquid of pump in SCR system in, through optimizing the runner, guarantee the inside liquid minimizing of remaining of the pump body, increased the expansion space of liquid, guarantee that the pump body can not damage because liquid freezes, practiced thrift the cost, guaranteed pump body job stabilization nature for the product has certain reliability.
Description
Technical field
The utility model belongs to automobile environment-protection technical field, especially relates in a kind of SCR system preventing from liquid in pump from freezing causing the structure of damage.
Background technique
At present, the heavy-duty commercial vehicle of more than 90% carries diesel engine, selective catalytic reduction (being called for short SCR) technology realizes the mainstream technology route that exhaust emissions of diesel engine reaches state IV and above regulation, namely reduce soot by emission controls by improving combustion, the method then utilizing SCR system to reduce NOx emission carrys out satisfy regulatory; SCR system adopts urea to make reducing agent (have another name called and add indigo plant), carries out reduction reaction, harmful NOx is reduced into harmless nitrogen and water under the effect of catalysts selective.In SCR system, comprise aqueous solution of urea storage tank, urea metering pump and nozzle, catalytic muffler, the original papers such as pressure transducer and the sprue for aqueous solution of urea circulation, urea metering pump is assembly most crucial in SCR system, pressure transducer is in order to detect the force value of aqueous solution of urea in sprue, when outside air temperature is lower, the phenomenon that urea metering pump can freeze, pressure transducer installing space due to emptying situation not good enough, the aqueous solution of urea frozen in pressure transducer installation cavity causes damage to pressure transducer, at present, prevent aqueous solution of urea from freezing and cause the structure of damage comparatively complicated, add product complexity and add quality of product, increase the volume of product, be unfavorable for reliability and the lightweight of product.
Summary of the invention
In view of this, the utility model is intended to propose to prevent liquid in pump from freezing in a kind of SCR system and causes the structure of damage, to solve the anti-freeze technology Single-issue of existing urea metering pump.
For achieving the above object, the technical solution of the utility model is achieved in that
Prevent liquid in pump from freezing in a kind of SCR system and cause the structure of damage, comprise the pump housing, the top of the described pump housing is provided with pressure transducer installation cavity, pressure transducer feed liquor runner is provided with in this pump housing, described pressure transducer feed liquor flow channel entry point is communicated with the sprue of SCR system, described pressure transducer feed liquor runner exit is communicated with pressure transducer installation cavity, on the described pump housing also and the sprue of SCR system be connected in series be provided with the first feed pathway, this first feed pathway is horizontally disposed with, described first feed pathway entrance is opening outwardly tubaeform, the inwall of described first feed pathway entrance is provided with groove, the first elastomer is embedded with in described groove.
Further, described pressure transducer feed liquor runner exit is arranged on the bottom of pressure transducer installation cavity, described pressure transducer installation cavity is provided with the second elastomer in the joint with pressure transducer feed liquor runner, described second elastomer and pressure transducer feed liquor runner exit just right be provided with through hole, described pressure transducer feed liquor runner is obliquely installed, and this pressure transducer feed liquor runner is positioned at high-end with the end that is communicated with of pressure transducer installation cavity.
Further, described first feed pathway entrance comprises the entrance part, the first throughput and the second throughput that are communicated with successively, described second throughput is directly communicated with the first feed pathway, described first throughput is cone structure form, described second throughput is globoidal structure form, and described first throughput and the second throughput seamlessly transit.
Further, the diameter of the joint of described second throughput and the first feed pathway is greater than the diameter of the first feed pathway, and described groove is arranged on the inwall of the second throughput and the first feed pathway connection, and the open horizontal of described groove is outwards arranged.
Further, described groove is arranged around the center line of the first feed pathway.
Further, described groove is U-type groove, the setting corresponding with this groove of described first elastomeric sectional shape.
Relative to prior art, prevent liquid in pump from freezing in a kind of SCR system described in the utility model and cause the structure of damage to have following advantage:
(1). prevent liquid in pump from freezing in a kind of SCR system described in the utility model and cause in the structure of damage, first feed pathway entrance is tubaeform, the runner form of this optimization is convenient to the circulation of aqueous solution of urea, the inwall of this first feed pathway is provided with the first elastomer, thereby increase the expansion space of aqueous solution of urea, ensure that product can not because of aqueous solution of urea freeze produce expansion and damage.
(2). prevent liquid in pump from freezing in a kind of SCR system described in the utility model and cause in the structure of damage, owing to needing the pressure transducer arranging aqueous solution of urea pressure in monitoring sprue in SCR system, to freeze the damage that pressure transducer is caused for preventing aqueous solution of urea, pressure transducer is arranged on the top of the pump housing, in this programme, pressure transducer feed liquor runner adopts the design of inclination, and pressure transducer feed liquor runner exit is arranged on the lower of pressure transducer installation cavity, when vehicle quits work, because the pump of SCR system shuts down, now sprue internal pressure reduces, this structural type ensure that the Liquid Residue in pressure transducer installation cavity minimizes, ensure that the Environmental Conditions of pressure transducer, therefore ensure that pressure transducer normally uses, and extend the working life of pressure transducer.
(3). prevent liquid in pump from freezing in a kind of SCR system described in the utility model and cause in the structure of damage, first feed pathway entrance comprises the entrance part, the first throughput and the second throughput that are communicated with successively, first throughput adopts cone structure form, second throughput adopts globoidal structure form, first feed pathway entrance adopts this structural type to meet flow of fluid principle, and that tries one's best ensure that aqueous solution of urea pressure and speed.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the first feed pathway structure principle chart in the structure that prevents from liquid in pump from freezing in a kind of SCR system described in the utility model embodiment causing damage;
Fig. 2 is pressure transducer feed liquor runner schematic diagram in the structure that prevents from liquid in pump from freezing in a kind of SCR system described in the utility model embodiment causing damage;
Description of reference numerals:
The 1-pump housing, 2-first feed pathway,
3-first elastomer, 4-first feed pathway entrance,
41-entrance part, 42-first throughput,
43-second throughput, 5-pressure transducer feed liquor runner,
51-pressure transducer feed liquor flow channel entry point, 52-pressure transducer feed liquor runner exit,
6-pressure transducer installation cavity, 7-second elastomer,
71-through hole.
Embodiment
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As Figure 1-Figure 2, prevent liquid in pump from freezing in a kind of SCR system and cause the structure of damage, comprise the pump housing 1, the top of the described pump housing 1 is provided with pressure transducer installation cavity 6, pressure transducer feed liquor runner 5 is provided with in this pump housing 1, described pressure transducer feed liquor flow channel entry point 51 is communicated with the sprue of SCR system, described pressure transducer feed liquor runner exit 52 is communicated with pressure transducer installation cavity 6, on the described pump housing 1 also and the sprue of SCR system be connected in series be provided with the first feed pathway 2, this first feed pathway 2 is horizontally disposed with, described first feed pathway entrance 4 is opening outwardly tubaeform, described first feed pathway entrance 4 comprises the entrance part 41 be communicated with successively, first throughput 41 and the second throughput 43, described second throughput 43 is directly communicated with the first feed pathway 2, described first throughput 42 is cone structure form, described second throughput 43 is globoidal structure form, described first throughput 42 and the second throughput 43 seamlessly transit, the diameter of the joint of described second throughput 43 and the first feed pathway 2 is greater than the diameter of the first feed pathway 2, namely be formed with shoulder between the first feed pathway 2 and the second throughput 43, at the inwall of described second throughput 43 and the first feed pathway 2 connection, namely the center line around the first feed pathway 2 in the shoulder place of the first feed pathway 2 and the second throughput 43 is provided with U-shaped groove, the open horizontal of described groove is outwards arranged, namely groove is just arranged entrance part 41, the first low temperature resistant elastomer 3 is embedded with in described groove, the first elastomer 3 is adopted to adopt silica gel material in the present embodiment.
Described pressure transducer feed liquor runner exit 52 is arranged on the bottom of pressure transducer installation cavity 6, described pressure transducer installation cavity 6 is provided with the second elastomer 7 in the joint with pressure transducer feed liquor runner 5, this second elastomer 7 adopts low temperature resistant silica gel material, described second elastomer 7 and pressure transducer feed liquor runner exit 52 just right be provided with through hole 71, described pressure transducer feed liquor runner 5 is obliquely installed, this pressure transducer feed liquor runner 5 is positioned at high-end with the end that is communicated with of pressure transducer installation cavity 6, when this structural type ensure that SCR system does not work, in pressure transducer installation cavity, Liquid Residue minimizes, ensure that the normal working state of pressure transducer and longer working life thus.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. prevent liquid in pump from freezing in a SCR system and cause the structure of damage, comprise the pump housing (1), the top of the described pump housing (1) is provided with pressure transducer installation cavity (6), pressure transducer feed liquor runner (5) is provided with in this pump housing (1), described pressure transducer feed liquor flow channel entry point (51) is communicated with the sprue of SCR system, described pressure transducer feed liquor runner exit (52) is communicated with pressure transducer installation cavity (6), what the described pump housing (1) sprue that is also upper and SCR system was connected in series is provided with the first feed pathway (2), this first feed pathway (2) is horizontally disposed with, it is characterized in that: described first feed pathway entrance (4) is opening outwardly tubaeform, the inwall of described first feed pathway entrance (4) is provided with groove, the first elastomer (3) is embedded with in described groove.
2. prevent liquid in pump from freezing in a kind of SCR system according to claim 1 and cause the structure of damage, it is characterized in that: described pressure transducer feed liquor runner exit (52) is arranged on the bottom of pressure transducer installation cavity (6), described pressure transducer installation cavity (6) is provided with the second elastomer (7) in the joint with pressure transducer feed liquor runner (5), described second elastomer (7) and pressure transducer feed liquor runner exit (52) just right be provided with through hole (71), described pressure transducer feed liquor runner (5) is obliquely installed, this pressure transducer feed liquor runner (5) is positioned at high-end with the end that is communicated with of pressure transducer installation cavity (6).
3. prevent liquid in pump from freezing in a kind of SCR system according to claim 1 and 2 and cause the structure of damage, it is characterized in that: described first feed pathway entrance (4) comprises the entrance part (41) be communicated with successively, first throughput (42) and the second throughput (43), described second throughput (43) is directly communicated with the first feed pathway (2), described first throughput (42) is cone structure form, described second throughput (43) is globoidal structure form, described first throughput (42) and the second throughput (43) seamlessly transit.
4. prevent liquid in pump from freezing in a kind of SCR system according to claim 3 and cause the structure of damage, it is characterized in that: the diameter of described second throughput (43) and the first feed pathway (2) joint is greater than the diameter of the first feed pathway (2), described groove is arranged on the inwall of the second throughput (43) and the first feed pathway (2) connection, and the open horizontal of described groove is outwards arranged.
5. prevent liquid in pump from freezing in a kind of SCR system according to claim 1 and 2 and cause the structure of damage, it is characterized in that: described groove is arranged around the center line of the first feed pathway (2).
6. prevent liquid in pump from freezing in a kind of SCR system according to claim 1 and 2 and cause the structure of damage, it is characterized in that: described groove is U-type groove, the sectional shape setting corresponding with this groove of described first elastomer (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520948496.5U CN205225391U (en) | 2015-11-24 | 2015-11-24 | Prevent frozen structure that causes damage of interior liquid of pump in SCR system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520948496.5U CN205225391U (en) | 2015-11-24 | 2015-11-24 | Prevent frozen structure that causes damage of interior liquid of pump in SCR system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205225391U true CN205225391U (en) | 2016-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520948496.5U Expired - Fee Related CN205225391U (en) | 2015-11-24 | 2015-11-24 | Prevent frozen structure that causes damage of interior liquid of pump in SCR system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205225391U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351052A (en) * | 2015-11-24 | 2016-02-24 | 天津星洁汽车排放控制系统有限公司 | Structure for preventing pump from being damaged by liquid freezing in pump in SCR (Selective Catalytic Reduction) system |
-
2015
- 2015-11-24 CN CN201520948496.5U patent/CN205225391U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351052A (en) * | 2015-11-24 | 2016-02-24 | 天津星洁汽车排放控制系统有限公司 | Structure for preventing pump from being damaged by liquid freezing in pump in SCR (Selective Catalytic Reduction) system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 Termination date: 20201124 |