CN204225971U - A kind of sparger for SCR system - Google Patents
A kind of sparger for SCR system Download PDFInfo
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- CN204225971U CN204225971U CN201420616115.9U CN201420616115U CN204225971U CN 204225971 U CN204225971 U CN 204225971U CN 201420616115 U CN201420616115 U CN 201420616115U CN 204225971 U CN204225971 U CN 204225971U
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- injection pipe
- convex tendon
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Abstract
The utility model discloses a kind of sparger for SCR system, and its structure comprises injector body, shower nozzle, injection pipe, injection cap; Described injection cap is installed on the tail end of this injector body, described injection pipe is arranged in the inner chamber of injector body, pass the injection cap of injector body tail end to form joint by one end of injection pipe, the other end of injection pipe stretches out head end and the shower nozzle assembly of injector body; Wherein, some concave points are got along spacing in the head end periphery of this injection pipe, and the outside extruding of each concave point forms convex tendon, and this concave point and convex tendon are clamp-oned in shower nozzle and formed interference fit; Mode by employing concave point, convex tendon reaches the effect of interference fit, replaces traditional laser spot welding, can ensure the concentricity of two assembly parts, improve the welding quality of finished product greatly, improve manufacturing efficiency.
Description
Technical field
The utility model relates to urea sensor art, refers in particular to a kind of sparger reliable and stable for the package assembly of SCR system.
Background technique
Along with the quick growth of Chinese automobile output and recoverable amount, motor vehicle exhaust emission pollution problem is increasingly serious, in order to tackle this outstanding problem, country has put into effect the automobile emissions standards regulation of different phase successively, and each automobile and engine industry also progressively take corresponding technical measures to meet to motor car engine and add tight Abgasgesetz gradually.Main employing SCR selective reduction technology (Chinese is called Selective catalytic reduction technology) in Heavy Duty Diesel Engine discharge at present, utilize the resultant after NH3(hydrolysis of urea) as reducing substances, under uniform temperature and catalyst action, utilize NH3 that NOx is reduced to N2 and H2O.Due to NH3 optionally preferential reducing NOx and first not reacting with O2 under the effect of catalyzer, therefore be called " selective catalytic reduction ".NH3 is good reducing agent, but there is very strong excitant, be not easy to directly use on automobile, and aqueous solution of urea is nontoxic, harmless, store and convenient transportation and do not have penetrating odor, therefore generally use the aqueous solution of urea of 32.5% concentration as the reducing agent of vehicle-mounted SCR system, Adblue is referred to as in Europe, the U.S. is called as Diesel Exhaust Fluid (DEF), and international standard ISO22241-1 " Adblue Standard " has also carried out the requirement of quality standard to the NOx reducing agent of diesel engine vent gas process.
Use SCR technology, then need design system, can by urea-spray in engine exhaust pipe, this system realizes with the sparger connecting urea sensor mutually of engine exhaust pipe.The structure of the sparger of conventional urea sensor generally comprises injector body, shower nozzle, injection pipe, injection cap and joint.This injector body is provided with a perforate, after gun hose and shower nozzle are linked together by welding manner, through the endoporus of injector body, then makes to be linked together by welding manner in shower nozzle loading perforate.In addition, injector body is also be fixedly connected with by identical welding manner with spraying between cap, spraying between cap with injection pipe, between joint with injection pipe.Under normal circumstances, before welding, the assembling conveniently between two parts, generally can reserve certain gap, but reserved gap easily causes the gap between two parts uneven, occurs the bad problem of concentricity sideslip, welded seal.
Model utility content
In view of this, the utility model is for the disappearance of prior art existence, its main purpose is to provide a kind of sparger for SCR system, it can ensure the concentricity of two assembly parts in sparger, realize the interference fit effect of assembling, to strengthen the weld strength of shower nozzle and injector body, improve the welding quality of finished product greatly, effectively enhance productivity.
For achieving the above object, the utility model adopts following technological scheme:
A kind of sparger for SCR system, comprise injector body, shower nozzle, injection pipe, injection cap, described injection cap is installed on the tail end of this injector body, described injection pipe is arranged in the inner chamber of injector body, the injection cap of injector body tail end is passed to form joint by one end of injection pipe, the other end of injection pipe stretches out head end and the shower nozzle assembly of injector body, wherein, some concave points are got along spacing in the head end periphery of this injection pipe, the outside extruding of each concave point forms convex tendon, and this concave point and convex tendon are clamp-oned in shower nozzle and formed interference fit.
As a kind of preferred version, described injection pipe comprises straight tube body and elbow, and this elbow is integrally connected to one end of straight tube body; Described shower nozzle has several spray-hole, has annular mounting groove in the bottom of this shower nozzle; Described concave point and convex tendon are located at the elbow periphery of injection pipe, and the annular mounting groove that this elbow clamp-ons shower nozzle by concave point, convex tendon forms interference fit assembling.
As a kind of preferred version, the tail end of the straight tube body of described injection pipe is arranged with a connecting ring.
As a kind of preferred version, described injector body is hollow tube, and it is made up of the large pipe of integral type, conical pipe and little pipe, and this conical pipe is connected between large pipe and little pipe and makes the inner chamber of injector body by large to little transition; The straight tube that this injector body is set in injection pipe is external, and the corresponding position of this straight tube body establishes concave point, convex tendon, and described little pipe extruding packs tightly and forms interference fit assembling outward in this concave point, convex tendon.
As a kind of preferred version, the second joint that described injection cap comprises cap body, is integrally provided on the first joint of this cap body head end, is integrally provided on this cap body tail end, the internal diameter of this first joint, cap body, the second joint reduces successively; Wherein, the size of the first joint is mated with the large pipe of injector body, establishes concave point, convex tendon in the periphery of described large pipe, and the concave point of this large pipe, convex tendon are clamp-oned in the first joint and formed interference fit assembling.
As a kind of preferred version, the size of the second joint of described injection cap is mated with injection pipe, establishes concave point, convex tendon at the corresponding position of the straight tube body of injection pipe, the concave point of this straight tube body, convex tendon clamp-on spray cap 40 the first joint in realize interference fit assembling.
As a kind of preferred version, the periphery of described first joint is provided with multiple shrinkage pool, is provided with pin in each shrinkage pool.
The utility model compared with prior art has obvious advantage and beneficial effect, specifically, as shown from the above technical solution, because concave point, convex rib structure are got in each assembling position of sparger, the concentricity of two assembly parts can be ensured, to reach the effect of interference fit, two assembly parts can directly be installed in grafting, and without the need to the fixed component that other is additional, assembling is easily simple, time saving and energy saving, effectively improve efficiency of assembling.
For more clearly setting forth structure characteristic of the present utility model and effect, below in conjunction with accompanying drawing and specific embodiment, the utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is the sectional view of the sparger of the embodiment of the utility model;
Fig. 2 be in the sparger of the embodiment of the utility model injection pipe and shower nozzle assembling before schematic diagram;
Fig. 3 is the plan view of the sparger of the embodiment of the utility model;
Fig. 4 is the sectional view at A-A place in Fig. 3;
Fig. 5 is the sectional view at B-B place in Fig. 3;
Fig. 6 is the sectional view at C-C place in Fig. 3;
Fig. 7 is the sectional view at D-D place in Fig. 3.
Accompanying drawing identifier declaration:
10, injector body 11, large pipe
12, conical pipe 13, little pipe
20, shower nozzle 21, spray-hole
22, annular mounting groove 30, injection pipe
31, straight tube body 32, elbow
33, connecting ring 40, injection cap
41, cap body 42, first joint
43, the second joint 44, shrinkage pool
45, pin 50, interference fit
51, concave point 52, convex tendon.
Embodiment
Please refer to shown in Fig. 1 to Fig. 7, that show the concrete structure of the preferred embodiment of the utility model, is a kind of sparger for SCR system, and its composition structure includes injector body 10, shower nozzle 20, injection pipe 30, sprays cap 40.Wherein, described injection cap 40 is installed on the tail end of this injector body 10, described injection pipe 30 is arranged in the inner chamber of injector body 10, stretched out head end and shower nozzle 20 assembly of injector body 10 by one end of injection pipe 30, the other end of injection pipe 30 passes the injection cap 40 of injector body 10 tail end to form joint.
Specifically, as shown in Figure 1, described injector body 10 is hollow tube, and it is made up of the large pipe 11 of integral type, conical pipe 12 and little pipe 13, this conical pipe 12 is connected between large pipe 11 and little pipe 13, makes the inner chamber of injector body 10 by large to little transition.
The second joint 43 that described injection cap 40 comprises cap body 41, is integrally provided on the first joint 42 of this cap body 41 head end, is integrally provided on this cap body 41 tail end.The internal diameter of this first joint 42, cap body 41, second joint 43 reduces successively.Wherein, the size of the first joint 42 is mated with the large pipe 11 of injector body 10, and the size of the second joint 43 is mated with injection pipe 30.In addition, the periphery of this first joint 42 is provided with multiple shrinkage pool 44, is provided with pin 45 in each shrinkage pool 44.
Described injection pipe 30 comprises straight tube body 31 and elbow 32, and this elbow 32 is integrally connected to one end of straight tube body 31, for being connected with shower nozzle 20.This shower nozzle 20 has several spray-hole 21, and the bottom of shower nozzle 20 has annular mounting groove 22, carries out assembly for covering on outside elbow 32.In addition, the tail end of this injection pipe 30 is also arranged with a connecting ring 33, so that sparger and other mechanism assemble.
Hold, as shown in Figures 2 to 7, in the utility model, between described shower nozzle 20 and injection pipe 30, between injector body 10 and injection pipe 30, injector body 10 and to spray between cap 40, spray between cap 40 and injection pipe 30 be all that mode by a kind of interference fit 50 is first assembled, then to be welded and fixed.
Specifically, the package assembly of this kind of interference fit 50 is Figure 2 shows that example is described.Fig. 2 shows the linkage structure of the elbow 32 of shower nozzle 20 and injection pipe 30.Wherein, in this elbow 32 outer circumferential face spacing get concave point 51, while getting ready can the outside of concave point 51 extruding formed convex tendon 52, to form the shape of shaggy tooth.During assembling, directly this injection pipe 30 is clamp-oned in the annular mounting groove 22 of shower nozzle 20, form interference fit 50 with the inner peripheral surface of this annular mounting groove 22 and assemble.This kind of assembling mode can ensure the concentricity of two assembly parts, and to reach close-fitting effect, two assembly parts can directly be installed in grafting, and without the need to the fixed component that other is additional, assembling is easily simple, time saving and energy saving, effectively improves efficiency of assembling.As shown in Figure 4, after assembly, the gap uniformity between two assembly parts, can increase the sealing of follow-up welding.
As shown in Figure 5, with identical group mode, also realize interference fit 50 between the little pipe 13 of injector body 10 and injection pipe 30 and assemble.Its mode establishes concave point 51, convex tendon 52 at the corresponding position of injection pipe 30, less pipe 13 extruding packed tightly outside these concave points 51, convex tendon 52.As shown in Figure 6, same, concave point 51, convex tendon 52 are set outside the large pipe 11 of injector body 10, then clamp-on in the first joint 42 of injection cap 40, to realize interference fit 50.As shown in Figure 7, establish concave point 51, convex tendon 52 at the corresponding position of injection pipe 30, then by clamp-oning in the first joint 42 of injection cap 40, realize interference fit 50 equally.
In sum, design focal point of the present utility model is, concave point 51, convex tendon 52 structure are got in each assembling position due to sparger, the concentricity of two assembly parts can be ensured, to reach the effect of interference fit 50, two assembly parts can directly be installed in grafting, without the need to the fixed component that other is additional, assembling is easily simple, time saving and energy saving, effectively improves efficiency of assembling.
The above, it is only preferred embodiment of the present utility model, not technical scope of the present utility model is imposed any restrictions, therefore every above embodiment is done according to technical spirit of the present utility model any trickle amendment, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (7)
1. the sparger for SCR system, it is characterized in that: comprise injector body, shower nozzle, injection pipe, spray cap, described injection cap is installed on the tail end of this injector body, described injection pipe is arranged in the inner chamber of injector body, the injection cap of injector body tail end is passed to form joint by one end of injection pipe, the other end of injection pipe stretches out head end and the shower nozzle assembly of injector body, wherein, some concave points are got along spacing in the head end periphery of this injection pipe, the outside extruding of each concave point forms convex tendon, this concave point and convex tendon are clamp-oned in shower nozzle and are formed interference fit.
2. a kind of sparger for SCR system according to claim 1, it is characterized in that: described injection pipe comprises straight tube body and elbow, this elbow is integrally connected to one end of straight tube body; Described shower nozzle has several spray-hole, has annular mounting groove in the bottom of this shower nozzle; Described concave point and convex tendon are located at the elbow periphery of injection pipe, and the annular mounting groove that this elbow clamp-ons shower nozzle by concave point, convex tendon forms interference fit assembling.
3. a kind of sparger for SCR system according to claim 2, is characterized in that: the tail end of the straight tube body of described injection pipe is arranged with a connecting ring.
4. a kind of sparger for SCR system according to claim 2, it is characterized in that: described injector body is hollow tube, it is made up of the large pipe of integral type, conical pipe and little pipe, and this conical pipe is connected between large pipe and little pipe and makes the inner chamber of injector body by large to little transition; The straight tube that this injector body is set in injection pipe is external, and the corresponding position of this straight tube body establishes concave point, convex tendon, and described little pipe extruding packs tightly and forms interference fit assembling outward in this concave point, convex tendon.
5. a kind of sparger for SCR system according to claim 4, it is characterized in that: the second joint that described injection cap comprises cap body, is integrally provided on the first joint of this cap body head end, is integrally provided on this cap body tail end, the internal diameter of this first joint, cap body, the second joint reduces successively; Wherein, the size of the first joint is mated with the large pipe of injector body, establishes concave point, convex tendon in the periphery of described large pipe, and the concave point of this large pipe, convex tendon are clamp-oned in the first joint and formed interference fit assembling.
6. a kind of sparger for SCR system according to claim 5, it is characterized in that: the size of the second joint of described injection cap is mated with injection pipe, establish concave point, convex tendon at the corresponding position of the straight tube body of injection pipe, the concave point of this straight tube body, convex tendon clamp-on spray cap the first joint in realize interference fit assembling.
7. a kind of sparger for SCR system according to claim 5, is characterized in that: the periphery of described first joint is provided with multiple shrinkage pool, is provided with pin in each shrinkage pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420616115.9U CN204225971U (en) | 2014-10-23 | 2014-10-23 | A kind of sparger for SCR system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420616115.9U CN204225971U (en) | 2014-10-23 | 2014-10-23 | A kind of sparger for SCR system |
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| CN204225971U true CN204225971U (en) | 2015-03-25 |
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| CN201420616115.9U Active CN204225971U (en) | 2014-10-23 | 2014-10-23 | A kind of sparger for SCR system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111468895A (en) * | 2020-04-13 | 2020-07-31 | 绍兴久瑞户外用品有限公司 | Method for manufacturing tent bracket |
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2014
- 2014-10-23 CN CN201420616115.9U patent/CN204225971U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111468895A (en) * | 2020-04-13 | 2020-07-31 | 绍兴久瑞户外用品有限公司 | Method for manufacturing tent bracket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 101, No. 1, East Ring 3rd Street, Jitiagang, Huangjiang Town, Dongguan City, Guangdong Province, 523000 Patentee after: Guangdong Zhengyang Sensor Technology Co.,Ltd. Address before: 523000 Dongguan Zhengyang Electronic Machinery Co.,Ltd., Jitigang Second Industrial Zone, Helu Industrial Avenue, Huangjiang Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN ZHENGYANG ELECTRONIC MECHANICAL Co.,Ltd. |
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| CP03 | Change of name, title or address |