CN205517168U - SCR is blender for case - Google Patents
SCR is blender for case Download PDFInfo
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- CN205517168U CN205517168U CN201620055755.6U CN201620055755U CN205517168U CN 205517168 U CN205517168 U CN 205517168U CN 201620055755 U CN201620055755 U CN 201620055755U CN 205517168 U CN205517168 U CN 205517168U
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- intermediate layer
- inner tube
- layer pipe
- pipe
- pore
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Abstract
The utility model relates to a SCR is blender for case, establish together outer pipe, intermediate level pipe and inlayer pipe including the cover, outer pipe, intermediate level pipe and fixing with one end of inlayer pipe is equipped with sealed water conservancy diversion lid, just sealed water conservancy diversion cover seted up with the water conservancy diversion mouth of inlayer pipe intercommunication, outer pipe with the inlayer pipe is kept away from the tip of sealed water conservancy diversion lid is all uncovered, the intermediate level pipe is kept away from the tip of sealed water conservancy diversion lid seals, intermediate level pipe with be equipped with a plurality of gas pockets of wearing on the inlayer pipe respectively. Mixed path is long, mixing uniformity is high, has improved the SCR transformation rate, greatly reduced crystallization risk, compact structure.
Description
Technical field
This utility model relates to SCR and is catalyzed silencing apparatus technical field, particularly relates to a kind of SCR case mixing
Device.
Background technology
SCR catalytic reduction technique is to reduce Diesel NOx discharge, meets state IV and the weight of above Abgasgesetz
Want technology path.Part SCR blender limits due to exhaust position at present, causes blender design simple,
Carbamide mixing uniformity is excessively poor, it is impossible to meet emission regulation demands；The simplification of blender design also causes
Carbamide is easily assembled in mixer inner walls, causes serious urea crystals problem.
As shown in Figure 4, for the structure of the SCR case blender of existing use, wherein SCR case blender is adopted
With blank pipe design i.e. mixing tube 6, excessively poor with the Combination of waste gas after carbamide spirt mixing tube 6, mix the completeest
Become gaseous mixture enter SCR case hybrid chamber, after complete catalytic reduction reaction through catalyst unit.
Existing air inlet mixed structure is primarily present following shortcoming:
(1) carbamide is low with waste gas mixing uniformity in above-mentioned blender, causes the conversion efficiency of SCR case
Low, it is impossible to meet the requirement of Abgasgesetz.
(2) heat insulation effect is poor, and only one layer pipe is incubated, and heat is the most lost, affects catalytic reaction
Efficiency, adds the risk of crystallization.
(3) urea crystals is easily caused, because being little to be formed any turbulent flow inside hollow tubular structure, urine
Element should not blow away after being attached to inner pipe wall, and mixing uniformity is poor in addition, so crystallization risk is the highest.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of gas mixed path length, mixed effect
Well, the SCR case blender of crystallization it is difficult to.
For solving above-mentioned technical problem, the technical solution of the utility model is: a kind of SCR case blender,
Including the outer tube being set-located, intermediate layer pipe and inner tube, described outer tube, intermediate layer are managed and described
Same one end of inner tube is fixed with on sealing fairing cap, and described sealing fairing cap and offers and described internal layer
The flow-guiding mouth of pipe connection；
Described outer tube and described inner tube are the most uncovered away from the end of described sealing fairing cap, described intermediate layer
Pipe is away from the end-enclosed of described sealing fairing cap, if being respectively equipped with in described intermediate layer pipe and described inner tube
Dry wear pore.
Improving as one, the pore position of wearing in described inner tube and described intermediate layer pipe is staggeredly arranged, institute
State and wear the pore opening end near described inner tube in inner tube, and with the atresia section of described intermediate layer pipe
Put correspondence, described intermediate layer pipe wear the pore blind end away from described intermediate layer pipe, and with described internal layer
The imperforate section position of pipe is corresponding.
Improving as one, the pore of wearing in described inner tube is covered with the outer peripheral face of described inner tube, described in
Pore of wearing on interbed pipe is covered with the outer peripheral face of described intermediate layer pipe.
As improving further, the outer surface of described intermediate layer duct occlusion end is spherical structure.
As improving further, the end that described intermediate layer pipe is connected with described sealing fairing cap offers scarce
Mouthful, the opening end of described inner tube also offers breach.
As improving further, the length of described outer tube is all higher than described intermediate layer pipe and described inner tube
Length.
Have employed technique scheme, the beneficial effects of the utility model are:
Due to this SCR case blender, including the outer tube being set-located, intermediate layer pipe and inner tube,
Same one end of described outer tube, intermediate layer pipe and described inner tube is fixed with sealing fairing cap, and described close
Offer, on envelope fairing cap, the flow-guiding mouth connected with described inner tube；
Described outer tube and described inner tube are the most uncovered away from the end of described sealing fairing cap, described intermediate layer
Pipe is away from the end-enclosed of described sealing fairing cap, if being respectively equipped with in described intermediate layer pipe and described inner tube
Dry wear pore.So waste gas of electromotor initially enters inner tube, enters back into intermediate layer pipe, afterwards from outer layer
In pipe flow out, compared to tradition use blender for, the mixed path of gas lengthens significantly, carbamide with
The mixing uniformity of waste gas is high, greatly improves the conversion efficiency of SCR case, and three-layer pipe is for heat simultaneously
Holding effective, heat is difficult to scatter and disappear, and can improve the temperature of blender, thus reduce urea crystals wind
Danger, improves carbamide and is converted into the efficiency of ammonia, compact conformation, the most additionally take cabinet space, it is easy to install.
Owing to the pore position of wearing in described inner tube and described intermediate layer pipe is staggeredly arranged, in described inner tube
Wear the pore opening end near described inner tube, and corresponding with the imperforate section position of described intermediate layer pipe, institute
State and wear the pore blind end away from described intermediate layer pipe on the pipe of intermediate layer, and with the imperforate section of described inner tube
Position is corresponding.So gas is introduced into inner tube and carries out the mixing of a period of time, the most again by inner tube
Wear pore to enter in intermediate layer pipe, in the pipe of intermediate layer be also first carry out the mixing of a period of time after, then pass through
Wearing of intermediate layer pipe enters in outer tube, so that the mixed effect of gas is more preferably in pore.
Owing to the pore of wearing in described inner tube is covered with the outer peripheral face of described inner tube, on the pipe of described intermediate layer
Wear pore and be covered with the outer peripheral face of described intermediate layer pipe, after such gas enters in inner tube, mixing with carbamide
During also in the pipe of intermediate layer, be possible not only to improve mixed effect, and can reduce inner tube with
The flowing of the back pressure in the pipe of intermediate layer, beneficially mixed gas.
Owing to the outer surface of intermediate layer duct occlusion end is spherical structure.Spherical structure is so that mixed gas exists
It is formed about the turbulent flow of whirlpool at this, is so easy to improve the mixed effect of gas, increases the mobility of gas,
Avoid managing the attachment of interior carbamide and cause crystallization.
The end being connected with described sealing fairing cap due to described intermediate layer pipe offers breach, described inner tube
Opening end also offer breach.Breach the back pressure that can reduce in respective tube is set, thus beneficially waste gas
Smooth outflow.
Owing to the length of described outer tube is all higher than described intermediate layer pipe and the length of described inner tube.Can be by
Gaseous mixture is delivered to the position away from catalyst, then returns again to enter in catalyst carrier, improves mixing
Effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model embodiment one；
Fig. 2 is decomposition texture schematic diagram of the present utility model；
Fig. 3 is the structural representation of this utility model embodiment two；
Fig. 4 is the structural representation of the SCR case blender of existing use；
In figure: 1, casing, 2, seal fairing cap, 20, flow-guiding mouth, 3, outer tube, 4, intermediate layer pipe,
40, pore is worn, 41, spherical structure, 42, breach, 5, inner tube, 50, wear pore, 51, breach, 6,
Mixing tube.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And embodiment, this utility model is further elaborated.Should be appreciated that described herein specifically
Embodiment, only in order to explain this utility model, is not used to limit this utility model.
Embodiment one
As Fig. 1 and Fig. 2 jointly shown in, a kind of SCR case blender, including the outer tube 3 being set-located,
Intermediate layer pipe 4 and inner tube 5, the length of outer tube 3 is all higher than intermediate layer pipe 4 and the length of inner tube 5,
Same one end of outer tube 3, intermediate layer pipe 4 and inner tube 5 is fixed with sealing fairing cap 2, seals fairing cap
2 are fixedly mounted on casing 1 inwall, and offer, on sealing fairing cap 2, the flow-guiding mouth connected with inner tube 5
20。
Outer tube 3 and inner tube 5 are the most uncovered away from the end sealing fairing cap 2, the opening end of inner tube 5
Offer breach 51, the back pressure in inner tube can be effectively reduced, it is ensured that engine exhaust flows swimmingly,
Intermediate layer pipe 4 is connected with sealing fairing cap 2 away from the end-enclosed of sealing fairing cap 2, intermediate layer pipe 4
End offers breach 42, equally reduces the back pressure in the pipe of intermediate layer, the appearance of intermediate layer duct occlusion end
Face is spherical structure 41, spherical structure so that ground mix waste gas turbulization near flowing at this, from
And improve the mobility of mixed gas, improve mixing uniformity, avoid carbamide in pipe intercrystalline, centre simultaneously
Being respectively equipped with on layer pipe 4 and inner tube 5 and some wear pore, the concrete arrangement wearing pore can be according to following
Form, waste gas and urea liquid mixing uniformity can be improved.
Pore position of wearing in inner tube 5 and intermediate layer pipe 4 is staggeredly arranged, inner tube 5 wears pore
50 is near the opening end of inner tube 5 and corresponding with the imperforate section position of intermediate layer pipe 4, on intermediate layer pipe 4
Wear the pore 40 blind end away from intermediate layer pipe 4, and corresponding with the imperforate section position of inner tube 5.
Operation principle is simply described below: during first engine exhaust enters inner tube 5, urea nozzle simultaneously
Injection urea liquid, waste gas enters in inner tube 5 and descending flowing together with urea liquid, in inner tube 5
Imperforate section in mix, arrive inner tube 5 bottom wear pore 50 position, mix waste gas is again from interior
Wear pore 50 and the opening end of layer pipe 5 enter in intermediate layer pipe 4, due to the existence of breach 51, it is ensured that
Mix waste gas flows in inner tube swimmingly, enters the mix waste gas in intermediate layer pipe 4 at intermediate layer pipe 4
Imperforate section in mix after and up flowing, flow to intermediate layer pipe 4 afterwards wears pore 40 position,
Flowing in outer tube 3 from wearing at pore 40 and breach 42, the most descending flowing arrives the bottom of outer tube 3
Enter after opening end in the hybrid chamber of SCR casing, then in the up inlet chamber flowing into SCR casing, it
Rear entrance catalyst carrier carries out catalytic reaction.
Embodiment two
The present embodiment is essentially identical with the structure of embodiment one, and its difference is, wearing in inner tube 5
Pore 50 is covered with the outer peripheral face of inner tube 5, and the pore 40 of wearing on intermediate layer pipe 4 is covered with intermediate layer pipe 4
Outer peripheral face.
The back pressure that this arrangement wearing pore can reduce in respective tube admirably, it is ensured that the waste gas of electromotor
Smoothly flow therein in inner tube and intermediate layer pipe, reasonable in design.Specific works principle is with reference to the work of above-mentioned introduction
Make process, repeat the most one by one at this.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model,
All any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, all should
Within being included in protection domain of the present utility model.
Claims (6)
1.SCR case blender, it is characterised in that include outer tube (3), intermediate layer pipe (4) being set-located
With inner tube (5), described outer tube (3), intermediate layer pipe (4) and described inner tube (5) same
End is fixed with sealing fairing cap (2), and offers and described inner tube on described sealing fairing cap (2)
(5) flow-guiding mouth (20) connected；
Described outer tube (3) and described inner tube (5) are the most spacious away from the end of described sealing fairing cap (2)
Mouthful, described intermediate layer pipe (4) is managed away from the end-enclosed of described sealing fairing cap (2), described intermediate layer
(4) and it is respectively equipped with in described inner tube (5) and some wears pore.
SCR case blender the most according to claim 1, it is characterised in that described inner tube (5) and
Pore position of wearing on described intermediate layer pipe (4) is staggeredly arranged, and described inner tube (5) wears pore (50)
It is near the opening end of described inner tube (5) and corresponding with the imperforate section position in described intermediate layer pipe (4),
Described intermediate layer pipe (4) on wear pore (40) away from described intermediate layer pipe (4) blind end, and with
The imperforate section position of described inner tube (5) is corresponding.
SCR case blender the most according to claim 1, it is characterised in that in described inner tube (5)
Pore (50) of wearing be covered with the outer peripheral face of described inner tube (5), described intermediate layer pipe (4) wears gas
Hole (40) is covered with the outer peripheral face in described intermediate layer pipe (4).
4. according to the SCR case blender described in Claims 2 or 3, it is characterised in that described intermediate layer pipe (4)
The outer surface of blind end is spherical structure (41).
SCR case blender the most according to claim 4, it is characterised in that described intermediate layer pipe (4)
The end being connected with described sealing fairing cap (2) offers breach (42), opening of described inner tube (5)
Mouth end also offers breach (51).
SCR case blender the most according to claim 5, it is characterised in that described outer tube (3)
Length is all higher than described intermediate layer pipe (4) and the length of described inner tube (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620055755.6U CN205517168U (en) | 2016-01-20 | 2016-01-20 | SCR is blender for case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620055755.6U CN205517168U (en) | 2016-01-20 | 2016-01-20 | SCR is blender for case |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205517168U true CN205517168U (en) | 2016-08-31 |
Family
ID=56765957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620055755.6U Active CN205517168U (en) | 2016-01-20 | 2016-01-20 | SCR is blender for case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205517168U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731932A (en) * | 2016-12-28 | 2017-05-31 | 潍柴动力股份有限公司 | A kind of SCR urea liquids blender |
-
2016
- 2016-01-20 CN CN201620055755.6U patent/CN205517168U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731932A (en) * | 2016-12-28 | 2017-05-31 | 潍柴动力股份有限公司 | A kind of SCR urea liquids blender |
| CN106731932B (en) * | 2016-12-28 | 2020-03-06 | 潍柴动力股份有限公司 | SCR urea solution mixer |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |