CN202659913U - Urea injection valve for selective catalytic reduction (SCR) system - Google Patents
Urea injection valve for selective catalytic reduction (SCR) system Download PDFInfo
- Publication number
- CN202659913U CN202659913U CN2012203366069U CN201220336606U CN202659913U CN 202659913 U CN202659913 U CN 202659913U CN 2012203366069 U CN2012203366069 U CN 2012203366069U CN 201220336606 U CN201220336606 U CN 201220336606U CN 202659913 U CN202659913 U CN 202659913U
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- China
- Prior art keywords
- spool
- injection valve
- valve
- scr system
- welding
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- 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.)
- Expired - Fee Related
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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
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model discloses a urea injection valve for a selective catalytic reduction (SCR) system. The urea injection valve comprises a valve core and a valve body, wherein a center hole is formed on the valve body, the valve core is in movably inserted match in the center hole, and the valve core and the valve body can relatively rotate and vertically slide and run. The upper end of the valve core is matched with an armature body by adopting laser welding, product deformation caused by high welding temperature can be overcome after a laser welding process is used, welding wires are not added when products are welded, the problem of reliability caused by pseudo soldering is solved by adopting numerical-control continuous welding and by partial rapid warming fusion of welding positions of two materials, the production speed is accelerated, and product cleanliness is improved.
Description
Technical field
The utility model relates to the technical field of internal combustion engine part, and is particularly a kind of for SCR system carbamide injection valve.
Background technique
In the prior art, valve core material 9Cr18Mo, armature body DT4 adopt argon arc welding technique between general spool and the armature body, and for these two kinds of different materials, when using the argon arc welding welding, welding temperature is high, and the postwelding product easily is out of shape.
When argon arc welding is welded, also need add welding wire, and this welding wire when fusing, two kinds of different materials easily forms rosin joint, and cause not prison welding to lean on, easily cause quality problems.
Summary of the invention
Technical problem to be solved in the utility model is the present situation for prior art, provide that a kind of product is indeformable, welding is reliable, speed of production reach soon the product turbidity test high be used for SCR system carbamide injection valve.
The utility model solves the problems of the technologies described above the technological scheme that adopts: a kind of for SCR system carbamide injection valve, include spool and valve body, wherein, valve body is formed with mesopore, spool activity inserting is in mesopore, and spool can rotate relatively with valve body and up and down slippage operation; The spool upper end adopts laser bonding to be combined with the armature body.
Adopts measure also comprises:
Above-mentioned spool and armature body joint have been provided with two places fusion weld seam at least.
Above-mentioned valve body lower portion is provided with the spray-hole for aqueous solution of urea.
Above-mentioned valve body lower portion is formed with inner conical surface, and the spool bottom is provided with the pressure-bearing conical surface, and inner conical surface and the pressure-bearing conical surface are sealed and matched when putting in place spool is descending.
The plane is shaped with the grooved ring body of indent on the above-mentioned armature body, is shaped with positioning hole in the middle of this grooved ring body.
Above-mentioned spool upper end is shaped with locating stud, and the locating stud locating stud cooperates with the eye-splice of armature body positioning hole.
Above-mentioned fusion weld seam is positioned at grooved ring body positioning hole upper brim along upper; Spool is positioned at the locating stud lower end and is shaped with cylindrical body, and generation has step body between this cylindrical body and the locating stud, deducts on this step body step body in armature body bottom.
Compared with prior art, of the present utility modelly a kind ofly include spool and valve body for SCR system carbamide injection valve, wherein, valve body is formed with mesopore, and spool activity inserting is in mesopore, and spool can rotate relatively with valve body and up and down slippage operation; The spool upper end adopts laser bonding to be combined with the armature body.The utility model has the advantage of: can solve because the high deformation of products that causes of welding temperature after using laser welding process, product does not add welding wire when welding, adopt the numerical control continuous welding by the fusion that is rapidly heated of the part of bi-material welding part, solve the integrity problem that rosin joint causes, speed of production is accelerated, and the product turbidity test improve.
Description of drawings
Fig. 1 is the vertical cross-sectional schematic of the utility model embodiment when assembling;
Fig. 2 is the utility model embodiment's cross-sectional schematic;
Fig. 3 is the utility model embodiment's process flow diagram.
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
Fig. 1 is to Figure 3 shows that structural representation of the present utility model.
Reference character among Fig. 1 to Fig. 3 wherein is: armature body 1, grooved ring body 11, spool 2, the pressure-bearing conical surface 21, locating stud 22, cylindrical body 23, step body 24, fusion weld seam 3, valve body 4, mesopore 4a, spray-hole 41, inner conical surface 42.
The utility model embodiment,
A kind of for SCR system carbamide injection valve, include spool 2 and valve body 4, wherein, valve body 4 is formed with mesopore 4a, and spool 2 activity insertings are in mesopore 4a, and spool 2 can rotate relatively with valve body 4 and up and down slippage operation; Spool 2 upper ends adopt laser bonding to be combined with armature body 1.
Spool 2 has been provided with two places fusion weld seam 3 at least with armature body 1 joint.
The plane is shaped with the grooved ring body 11 of indent on the armature body 1, is shaped with positioning hole in the middle of this grooved ring body 11.
Fusion weld seam 3 is positioned at grooved ring body 11 positioning hole upper brims along upper; Spool 2 is positioned at locating stud 22 lower ends and is shaped with cylindrical body 23, and generation has step body 24 between this cylindrical body 23 and the locating stud 22, deducts on this step body step body 24 in armature body 1 bottom.
The method for laser welding of a kind of SCR system carbamide injection valve wherein, includes following steps:
Be equipped with step: armature body 1 is complied with detain up and down the upper end that is assigned in valve core 2, and the location correctly;
Cleaning process: use ultrasonic cleaning apparatus to clean, in armature body 1 and valve core 2 connecting parts, remove oil stain and impurity;
Check step: from the flat, technological requirement, to armature body 1, valve core 2 soldering members carry out size, whether the position correctly checks;
Welding step: after size, position detection correctly, enable laser beam welding machine, with armature body 1, valve core 2 firm welding, and produce fusion weld seam 3;
Examine eventually step: with integrally welded armature body 1, valve core 2, from the flat, technological requirement are carried out size, location test; Be after the assay was approved certified products.
Check in the step, when size, position detection existence mistake, first armature body 1, spool 2 are separated, carry out again equipped step.
After the welding step, be provided with polishing and repair step, in this step, processing is polished on fusion weld seam 3 surfaces
The utility model embodiment's advantage is: can solve because the high deformation of products that causes of welding temperature after using laser welding process, product does not add welding wire when welding, adopt the numerical control continuous welding by the fusion that is rapidly heated of the part of bi-material welding part, solve the integrity problem that rosin joint causes, speed of production is accelerated, and the product turbidity test improve.
Most preferred embodiment of the present utility model is illustrated, and various variations or the remodeling made by those of ordinary skills can not break away from scope of the present utility model.
Claims (7)
1. one kind is used for SCR system carbamide injection valve, include spool (2) and valve body (4), it is characterized in that: described valve body (4) is formed with mesopore (4a), described spool (2) activity inserting is in mesopore (4a), and spool (2) can rotate relatively with valve body (4) and up and down slippage operation; Described spool (2) upper end adopts laser bonding to be combined with armature body (1).
2. according to claim 1 a kind of for SCR system carbamide injection valve, it is characterized in that: described spool (2) has been provided with two places fusion weld seam (3) at least with armature body (1) joint.
3. according to claim 2 a kind of for SCR system carbamide injection valve, it is characterized in that: described valve body (4) bottom is provided with the spray-hole (41) for aqueous solution of urea.
4. according to claim 3 a kind of for SCR system carbamide injection valve, it is characterized in that: described valve body (4) bottom is formed with inner conical surface (42), described spool (2) bottom is provided with the pressure-bearing conical surface (21), and described inner conical surface (42) is sealed and matched when descending the putting in place of spool (2) with the pressure-bearing conical surface (21).
5. according to claim 4 a kind of for SCR system carbamide injection valve, it is characterized in that: the upper plane of described armature body (1) is shaped with the grooved ring body (11) of indent, is shaped with positioning hole in the middle of this grooved ring body (11).
6. according to claim 5 a kind of for SCR system carbamide injection valve, it is characterized in that: described spool (2) upper end is shaped with locating stud (22), and locating stud locating stud (22) cooperates with armature body (1) positioning hole eye-splice.
7. according to claim 5 a kind of for SCR system carbamide injection valve, it is characterized in that: described fusion weld seam (3) is positioned at described grooved ring body (11) positioning hole upper brim along upper; Described spool (2) is positioned at locating stud (22) lower end and is shaped with cylindrical body (23), and producing between this cylindrical body (23) and the locating stud (22) has step body (24), deducts on this step body step body (24) in described armature body (1) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203366069U CN202659913U (en) | 2012-07-12 | 2012-07-12 | Urea injection valve for selective catalytic reduction (SCR) system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203366069U CN202659913U (en) | 2012-07-12 | 2012-07-12 | Urea injection valve for selective catalytic reduction (SCR) system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202659913U true CN202659913U (en) | 2013-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203366069U Expired - Fee Related CN202659913U (en) | 2012-07-12 | 2012-07-12 | Urea injection valve for selective catalytic reduction (SCR) system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202659913U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748481A (en) * | 2012-07-12 | 2012-10-24 | 宁波舜田良源油嘴油泵有限公司 | Urea injection valve for SCR (Selective Catalytic Reduction) system and laser welding method thereof |
| CN109915239A (en) * | 2017-12-13 | 2019-06-21 | 大陆汽车系统公司 | The reduction agent dose to improve equipment is reduced and purged with changes in flow rate feeds unit |
-
2012
- 2012-07-12 CN CN2012203366069U patent/CN202659913U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748481A (en) * | 2012-07-12 | 2012-10-24 | 宁波舜田良源油嘴油泵有限公司 | Urea injection valve for SCR (Selective Catalytic Reduction) system and laser welding method thereof |
| CN109915239A (en) * | 2017-12-13 | 2019-06-21 | 大陆汽车系统公司 | The reduction agent dose to improve equipment is reduced and purged with changes in flow rate feeds unit |
| US11162403B2 (en) | 2017-12-13 | 2021-11-02 | Vitesco Techologies USA, LLC | Reductant dosing unit with flow variability reduction and purge improvement device |
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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: 20130109 Termination date: 20180712 |