CN203978582U - Exhaust gas purifying device - Google Patents
Exhaust gas purifying device Download PDFInfo
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- CN203978582U CN203978582U CN201420354201.7U CN201420354201U CN203978582U CN 203978582 U CN203978582 U CN 203978582U CN 201420354201 U CN201420354201 U CN 201420354201U CN 203978582 U CN203978582 U CN 203978582U
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- exhaust gas
- gas purifying
- purifying device
- convolution
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- 238000002156 mixing Methods 0.000 claims abstract description 68
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims description 18
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 3
- 239000000654 additive Substances 0.000 abstract description 16
- 230000000996 additive effect Effects 0.000 abstract description 16
- 239000003054 catalyst Substances 0.000 abstract description 12
- 238000000265 homogenisation Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 62
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 30
- 229910021529 ammonia Inorganic materials 0.000 description 15
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 9
- 239000011236 particulate material Substances 0.000 description 8
- 239000007921 spray Substances 0.000 description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 5
- 239000004202 carbamide Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 208000016285 Movement disease Diseases 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model provides a kind of Exhaust gas purifying device.This Exhaust gas purifying device can do compactly by device entirety, and makes the velocity flow profile of Exhaust Gas and the CONCENTRATION DISTRIBUTION homogenization of additive of catalyst inlet.The upstream side of chamber portion (16) is communicated in the downstream side of straight line shape pipe portion (14) via curved sections of pipe (15), at straight line shape pipe portion (14) the configuration mixing component (5) of Exhaust gas purifying device (1), this Exhaust gas purifying device (1) is equipped with catalyzer (6) in chamber portion (16).
Description
Technical field
The utility model relates to a kind of Exhaust gas purifying device of internal-combustion engine, particularly relates to a kind of mixing component being configured in exhaust passageway.
Background technique
In the past, as the Exhaust gas purifying device of internal-combustion engine, as Patent Document 1, there is the Exhaust gas purifying device that comprises jet nozzles, SCR catalyzer (selective reduction type catalyzer) and oxidation catalyst.This Exhaust gas purifying device, to additive spray (aqueous solution of urea) in Exhaust Gas, mixes Exhaust Gas and additive.By Exhaust Gas and additive are mixed, utilize the water vapour in exhaust heat and Exhaust Gas to carry out hydrolyzable to the urea in additive, generate ammonia.And, utilize SCR catalyzer that the nitrogen oxide in Exhaust Gas and ammonia are reduced to nitrogen.In addition, utilizing oxidation catalyst is nitrogen and nitrogen oxide by the residue ammoxidation not reacting in the reduction reaction of carrying out under SCR catalyst action.
In addition, when above-mentioned Exhaust gas purifying device is mounted on a vehicle, seek to configure compactly, therefore, the each outlet pipe between catalyzer is bent to semicircle shape, integrally bending becomes alphabetical S shape ground pipe arrangement.
Prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2011-117385 communique
Model utility content
The problem that model utility will solve
But, due to the outlet pipe bending of above-mentioned Exhaust gas purifying device, therefore, in outlet pipe, there is the bias current of Exhaust Gas.Therefore,, compared with the outlet pipe of straight line shape, the velocity flow profile of the Exhaust Gas at SCR catalyst inlet place worsens.In addition,, because additive and Exhaust Gas can not mix fully, therefore, the CONCENTRATION DISTRIBUTION of the ammonia of generation produces inhomogeneous.Like this, the velocity flow profile of Exhaust Gas at SCR catalyst inlet place and the CONCENTRATION DISTRIBUTION of additive produce inhomogeneous, therefore, have may SCR catalyzer reduction efficiency reduce and SCR catalyzer in some areas deteriorated such problem.
Therefore, the purpose of this utility model is, a kind of Exhaust gas purifying device that can device entirety be done compactly and make the velocity flow profile of Exhaust Gas and the CONCENTRATION DISTRIBUTION homogenization of additive of SCR catalyst inlet is provided.
In addition, the purpose of this utility model is also to provide and can reduces the additive of the internal face that is attached to outlet pipe and the Exhaust gas purifying device that can Exhaust Gas and additive be stirred, be mixed.
For the scheme of dealing with problems
In order to solve above-mentioned problem, the utility model is a kind of Exhaust gas purifying device 1, the upstream side of its chamber portion 16 is communicated in the downstream side of straight line shape pipe portion 14 via curved sections of pipe 15, in this chamber portion 16, be equipped with catalyzer 6, it is characterized in that, dispose mixing component 5 in above-mentioned straight line shape pipe portion 14.
Be further characterized in that, above-mentioned mixing component 5 comprises along the tabular rectification part 51 of the flow direction configuration of Exhaust Gas.
Be further characterized in that, above-mentioned rectification part 51 is made up of plate-like members.
Be further characterized in that, above-mentioned rectification part 51 is extended and is provided with convolution portion 53 in its downstream side, and this convolution portion 53 is formed obliquely with the angle of being scheduled to respect to flow direction.
Be further characterized in that, the outlet pipe (14) that above-mentioned straight line shape pipe portion (14) is internal-combustion engine, above-mentioned mixing component (5) comprising: rectification part (51), it is made up of multiple commutator lugs (51a), the plurality of commutator lug (51a) from the central axis (O) of above-mentioned outlet pipe (14) to radial outside and along the axial formation of this outlet pipe (14), and, in a circumferential direction with equal angles arranged spaced, support (52), it extends and arranges to radial outside from the radial outside end of each commutator lug (51a), and, be connected to the internal face (14a) of this outlet pipe (14), convolution portion (53), it is with respect to being axially formed obliquely the dirty side at each commutator lug (51a) with the angle of being scheduled to.
Be further characterized in that, above-mentioned mixing component (5) has multiple units constituting partss (5a), and this unit constituting parts (5a) has the above-mentioned commutator lug of a group (51a) and the above-mentioned convolution portion (53) of becoming.Be provided with linking department (54) in the central side end of each commutator lug (51a), constituent parts constituting parts (5a) is connected by this linking department (54).
Be further characterized in that, above-mentioned mixing component (5) has multiple compound constituting partss (5b), utilize above-mentioned linking department (54) two above-mentioned unit constituting partss (5a) to be formed to this compound constituting parts (5b) taking above-mentioned central axis (O) as the mode of symmetry axis ground wire symmetry links, each linking department (54) of these compound constituting partss (5b) is disposed at different positions in the axial direction of above-mentioned outlet pipe (14), and these compound constituting partss (5b) are intersected, assembled with equal angles compartment of terrain by each linking department (54).
Be further characterized in that, above-mentioned support (52) is tabular extension and arranges from above-mentioned rectification part (51), and the internal face along above-mentioned outlet pipe (14) bends (14a), the plate face of this support (52) is connected to this internal face (14a).
Be further characterized in that, above-mentioned convolution portion (53) is formed as: between this convolution portion (53) and the internal face (14a) of above-mentioned outlet pipe (14), form gap (14c) with the size of being scheduled to.
Be further characterized in that, the outlet pipe (14) that above-mentioned straight line shape pipe portion (14) is internal-combustion engine, above-mentioned mixing component (5) comprising: convolution portion (53), it forms by this way: between this convolution portion (53) and the internal face (14a) of above-mentioned outlet pipe (14), form gap (14c) with the size of being scheduled to, in the time that Exhaust Gas flows in above-mentioned outlet pipe (14), form direct flow road (21) and convolution stream (22), this direct flow road (21) is tubular and is formed on the downstream side of this gap (14c), in direct flow road (21), Exhaust Gas is along the axial flow of the central axis (O) of this outlet pipe (14), this convolution stream (22) is formed on the cylinder inner side on this direct flow road (21), and in convolution stream (22), Exhaust Gas flows with respect to this ground that axially circles round of this central axis (O).
Be further characterized in that, the radial dimension of above-mentioned gap (14c) is set as constant in a circumferential direction.
Be further characterized in that, above-mentioned mixing component (5) has from above-mentioned convolution portion (53) to radial outside and extends the support (52) arranging, utilize this support (52), this convolution portion (53) is positioned at the position of leaving from the above-mentioned internal face (14a) of this outlet pipe (14), and this mixing component (5) is held in above-mentioned outlet pipe (14).
Be further characterized in that, above-mentioned mixing component (5) has multiple above-mentioned convolution portions (53), and this convolution portion (53) is centered by above-mentioned axis (O), in a circumferential direction with equal angles arranged spaced.
Be further characterized in that, above-mentioned convolution portion (53) at its upstream side is provided with tabular rectification part (51), and this rectification part arranges along extending axially of above-mentioned central axis (O).
The effect of model utility
The utility model, by mixing component 5 being arranged on to straight line shape pipe portion 14, when the mobile direction of Exhaust Gas is reversed in curved sections of pipe 15, at the interior movement disorder of curved sections of pipe 15, can improve the velocity flow profile of catalyzer 6 entrances.In addition, utilize flowing of being produced by mixing component 5 to stir spray the additive coming from sparger 4, the additive concentration that can improve catalyzer 6 entrances distributes.
In the utility model, swirling flow is met with direct flow in straight line shape pipe portion 14, and continues convolution, and therefore additive can not be attached to internal face 14a and be stirred in Exhaust Gas.Thus, additive is uniformly distributed, and can reduce the inwall that additive adheres to, is piled up in straight line shape pipe portion 14, suppresses exhaust system part and corrodes.
Brief description of the drawings
Fig. 1 represents a mode of execution of the present utility model, is the overall structure figure of Exhaust gas purifying device.
Fig. 2 represents a mode of execution of the present utility model, is the sectional view along the II-II line of Fig. 1.
Fig. 3 represents a mode of execution of the present utility model, is the sectional view along the III-III line of Fig. 2.
Fig. 4 is the stereogram that represents the mixing machine of present embodiment.
Fig. 5 (a), Fig. 5 (b) and Fig. 5 (c) are the plan views that represents the compound constituting parts of the mixing machine that forms present embodiment, the situation that Fig. 5 (a) representation unit constituting parts is connected in downstream side, the situation that Fig. 5 (b) representation unit constituting parts is connected in center side, the situation that Fig. 5 (c) representation unit constituting parts is connected at upstream side.
Fig. 6 is the vectorial line chart representing from the flow velocity in the pipe arrangement till the 1st bent portion to the 2 chamber portions.
Fig. 7 is the vectorial line chart of the flow velocity in the pipe arrangement representing in the situation of the mixing machine that disposes present embodiment.
Fig. 8 is the isoconcentration contour map that represents not use the CONCENTRATION DISTRIBUTION of the ammonia of the SCR catalyst inlet in the situation of mixing machine.
Fig. 9 is the isoconcentration contour map that represents the CONCENTRATION DISTRIBUTION of the ammonia of the SCR catalyst inlet in the situation of the mixing machine that disposes present embodiment.
Figure 10 is the stereogram that represents the 1st other modes of mixing machine.
Figure 11 is the side view that represents the 2nd other modes of mixing machine.
Figure 12 is the stereogram that represents the 2nd other modes of mixing machine.
Description of reference numerals
1, Exhaust gas purifying device; 5, mixing component (mixing machine); 6, catalyzer (SCR catalyzer); 14, straight line shape pipe portion; 15, curved sections of pipe (the 2nd bent portion); 16, chamber portion (the 2nd chamber portion); 51, rectification part; 53, convolution portion.
Embodiment
Use accompanying drawing to describe mode of execution of the present utility model in detail below.
As shown in Figure 1, the Exhaust gas purifying device 1 of present embodiment is arranged in the vent systems of diesel engine (internal-combustion engine) 101 of the power source that becomes vehicle (not shown).
The Exhaust gas purifying device 1 of present embodiment comprises oxidation catalyst 2, PM (particulate material) filter 3, sparger (jet nozzles) 4, mixing machine (mixing component) 5, SCR catalyzer (selective reduction type catalyzer) 6 and ASC catalyzer (the escaping of ammonia prevents catalyzer) 7.
In diesel engine 101, be provided with the turbosupercharger 103 with intercooler 102, be provided with Exhaust gas purifying device 1 at the turbine outlet 104 of turbosupercharger 103.That is to say, the 1st chamber portion 12 by connecting tube portion 11 be communicated in turbine outlet 104, in the 1st chamber portion 12, dispose oxidation catalyst 2 and PM filter 3.And, being communicated in the export department of the 1st chamber portion 12 for the 1st bent portions 13 of 180 degree of the mobile direction of the Exhaust Gas that reverses, the straight line shape pipe portion (outlet pipe) 14 of straight line shape is communicated in the export department of the 1st bent portion 13.At this, in the export department of the 1st bent portion 13, dispose sparger 4, and dispose mixing machine 5 at the inlet side of straight line shape pipe portion 14.The export department that is communicated in straight line shape pipe portion 14 for 180 the 2nd bent portions (curved sections of pipe) 15 of spending of the mobile direction of Exhaust Gas of again reversing, the 2nd chamber portion 16 is communicated in the export department of the 2nd bent portion 15.At this, in the 2nd chamber portion 16, dispose SCR catalyzer 6 and ASC catalyzer 7.And, being communicated in the export department of the 2nd chamber portion 16 for the 3rd bent portions 17 of 180 degree of the mobile direction of the Exhaust Gas that again reverses, the connecting tube portion 18 of leading to outside air is communicated in the export department of the 3rd bent portion 17.
The Exhaust Gas of discharging from diesel engine 101, contain carbon monoxide (CO), hydrocarbon (HC), nitrogen oxide (NO
x), particulate material (PM).And the CO in Exhaust Gas and HC be chemical combination in the time that Exhaust Gas passes through oxidation catalyst 2, generate carbon dioxide (CO
2) and water (H
2o).In addition, utilize PM filter 3 to collect the PM in Exhaust Gas.And, utilize sparger 4 to spray to the Exhaust Gas that has been collected PM the urea water (affix) of supplying with from urea water tank 4a.At this, utilize the heat of Exhaust Gas to carry out hydrolyzable to the urea spraying in next urea water, generate ammonia (NH
3).And, this NH
3and NO
xchemical combination when by SCR catalyzer 6, generates nitrogen (N
2) and H
2o.In addition, remain in the NH in Exhaust Gas
3oxygen (O when by ASC catalyzer 7 and in Exhaust Gas
2) chemical combination, by the nontoxic N that turns to
2and H
2o, is discharged in outside air afterwards.
The structure of mixing machine 5 then, is described.As shown in Fig. 2～Fig. 5, the mixing machine 5 of present embodiment comprises mobile rectification part 51 for rectifying Exhaust Gas, for mixing machine 5 being remained on to support 52 in straight line shape pipe portion 14 and for by the mobile convolution portion 53 that changes into swirling flow of Exhaust Gas.
Rectification part 51 consists of 6 commutator lug 5la that are made up of plate-like members, along become Exhaust Gas central axis O flow direction, straight line shape pipe portion 14 axially, dispose each plate face of commutator lug 51a.And, each commutator lug 5la from the central axis O of straight line shape pipe portion 14 along radial outside configure, and in a circumferential direction with equal angles arranged spaced.In addition, the radial dimension 51L of commutator lug 5la is set to such an extent that be less than the radius r of straight line shape pipe portion 14.
Support 52 forms in the following manner: from the radial outside end of each commutator lug 5la along radial outside with tabular extension arrange, and plate face along the internal face 14a of straight line shape pipe portion 14 bend.And, being connected to internal face 14a by the plate face of support 52, mixing machine 5 remains in straight line shape pipe portion 14.
The downstream side that is arranged on each commutator lug 5la extends in convolution portion 53, forms to the angle predetermined with respect to the axioversion of central axis O.In addition, convolution portion 53 has fan shape, and is formed as, and the major component of fan is corresponding with the central axis O of straight line shape pipe portion 14, and the circular arc edge 53b of fan is towards internal face 14a.And as shown in Figure 3, for convolution portion 53, the mode that is contacted with adjacent commutator lug 51a with the straight line edge 53a of fan in the time analysing and observe is set fan shape and the axial angle of inclination with respect to central axis O.
That is to say, the mixing machine 5 of present embodiment comprises 6 constituting parts 5a of unit, and the constituting parts 5a of this unit comprises commutator lug 5la, support 52, convolution portion 53, is made up of tabular component.In the constituting parts 5a of these units, across the central axis O ground of straight line shape pipe portion 14, relative rectification part 51 utilizes linking department 54 to be connected each other, and the constituting parts 5a of Liang Ge unit being bonded forms 1 compound constituting parts 5b.That is to say, as shown in Figure 5, the mixing machine 5 of present embodiment is made up of 3 compound constituting parts 5b.The constituting parts 5a of Liang Ge unit of each compound constituting parts 5b utilizes linking department 54 to be taking central axis O as the mode of symmetry axis ground wire symmetry to be connected.In addition, the linking department 54 of each compound constituting parts 5b links respectively upstream side, center side, the downstream side of rectification part 51, and the mode that these linking departments 54 can not form interference when being assembled on mixing machine 5 forms compound constituting parts 5b.
Utilize said structure, mixing machine 5 being arranged on to straight line shape pipe portion 14 when interior, the radial dimension being formed with on circumferencial direction between the radial outside end of commutator lug 51a and the internal face 14a of straight line shape pipe portion 14 is set to constant gap 14b, and the radial dimension being formed with on circumferencial direction between the circular arc edge 53b of convolution portion 53 and the internal face 14a of straight line shape pipe portion 14 is set to constant gap 14c.
And, being arranged in straight line shape pipe portion 14 by mixing machine 5, Exhaust Gas is interior when mobile in straight line shape pipe portion 14, as shown in Figure 2, is formed with direct flow road 21 and convolution stream 22 in straight line shape pipe portion 14.
Due to the gap between mixing machine 5 and the internal face 14a of straight line shape pipe portion 14, direct flow road 21 is tubular and is formed near the internal face 14a in straight line shape pipe portion 14.That is to say, due to be formed at the gap 14b between rectification part 51 and internal face 14a and be formed at convolution portion 53 and internal face 14a between gap 14c in mobile Exhaust Gas, direct flow road 21 is formed on the downstream side of gap 14b, 14c.And in direct flow road 21, Exhaust Gas is along the axial flow of the central axis O of straight line shape pipe portion 14.
Convolution stream 22 is formed on the cylinder inner side on direct flow road 21.That is to say, convolution stream 22 is formed on the downstream side by convolution portion 53 of straight line shape pipe portion 14.And, in convolution stream 22, Exhaust Gas with respect to the axial convolution of the central axis O of straight line shape pipe portion 14 flow.
Fig. 6, Fig. 7 represent Exhaust Gas mobile situation in straight line shape pipe portion the 14 and the 2nd bent portion 15, arrow towards representing mobile direction, the length of arrow represents mobile speed.In the situation that mixing machine not being set, as shown in Figure 6, below straight line shape pipe portion 14, flow velocity is slack-off, and flow velocity accelerates up.Therefore, in the 2nd bent portion 15, flow velocity faster mobile the keeping intact of top flow in SCR catalyzer 6, and the flow velocity of the each several part of SCR catalyzer 6 entrances produces larger difference.
With respect to this, in the situation that mixing machine 5 being arranged on to straight line shape pipe portion 14, as shown in Figure 7, the flow velocity that is formed on the direct flow road 21 of internal face 14a periphery accelerates, and the flow velocity of convolution stream 22 is slack-off.Therefore,, when the mobile direction of Exhaust Gas is reversed in the 2nd bent portion 15, at the interior movement disorder of the 2nd bent portion 15, can improve the velocity flow profile of SCR catalyzer 6 entrances.
Fig. 8, Fig. 9 are the isoconcentration contour maps that represents the ammonia concentration of SCR catalyzer 6 entrances, and the quantity of figure center line is more, represent that concentration difference is larger.In the situation that mixing machine 5 is not set, as shown in Figure 8, spray from sparger 4 urea water of coming and be not stirred and flow straight line shape pipe portion 14 is interior, therefore, produce denseer part and the rarer part of ammonia of ammonia.
With respect to this, in the situation that mixing machine 5 being arranged on to straight line shape pipe portion 14, as shown in Figure 9, spraying from sparger 4 the mixed machine 5 of urea water coming and stir, can improve the ammonia CONCENTRATION DISTRIBUTION of SCR catalyzer 6 entrances.
In view of above content, by mixing machine 5 being arranged on to straight line shape pipe portion 14, when the mobile direction of Exhaust Gas is reversed in the 2nd bent portion 15, at the interior movement disorder of the 2nd bent portion 15, can improve the velocity flow profile of SCR catalyzer 6 entrances.In addition, utilize flowing of being produced by mixing machine 5 to stir spray the urea water of coming from sparger 4, the additive concentration that can improve SCR catalyzer 6 entrances distributes.
That is to say, in straight line shape pipe portion 14, swirling flow runs into direct flow and continues convolution, and therefore, ammonia is not attached to internal face 14a and is stirred in Exhaust Gas.Thus, ammonia distributes equably, and the urea that adheres to, is deposited on the inwall of straight line shape pipe portion 14 reduces, and can suppress exhaust system part and corrode.In addition, constant by the radial dimension of gap 14b, 14c is set as in a circumferential direction, the direct flow road of formation is stable, can further reduce the urea that adheres to, is deposited on inwall.And, be not attached to inwall owing to spraying the urea water of coming, not free after spraying is ammonia by hydrolyzable poorly, therefore, can be with highi degree of accuracy control ammonia concentration.Thus, sparger 4 can spray the urea water of required sufficient amount, therefore, can improve the situation of waste urea water.
By the flow direction configuration along Exhaust Gas by tabular rectification part 51, can not hinder the fluidly rectification of Exhaust Gas to flow, can make the swirling flow that is formed on downstream side stablize, and, form rectification part 51 by plate-like members, thus, can not increase to manufacture and local Exhaust Gas is carried out to rectification.
And, by the downstream side of rectification part 51, convolution portion 53 being set, after rectification, circle round, therefore produce the swirling flow of having rectified, can promote the stirring of Exhaust Gas.In addition, by multiple convolution portion 53 with equal angles arranged spaced in straight line shape pipe portion 14, the swirling flow that can make to be formed on downstream side is stable.
By towards flow direction the plate face of the tabular support 52 that forms be connected to internal face 14a, can not hinder fluidly mixing machine 5 being remained in straight line shape pipe portion 14 of Exhaust Gas.
Each linking department 54 by compound constituting parts 5b staggers in upstream side, center side, the downstream side of rectification part 51, and the assembling can prevent from assembling mixing machine 5 time makes mistakes.
In addition, the rectification part 51 of present embodiment is formed as planar, but in the case of the export department etc. that mixing machine 5 is configured in to the 1st bent portion 13, also can make the bending structure in ground that matches with the curvature of the 1st bent portion 13.
Then, use the 1st other modes of brief description of the drawings mixing machine 5.In addition, to the structure same with above-mentioned mode of execution, mark identical reference character, omission explains.
Mixing machine 5 with respect to above-mentioned mode of execution is made up of 6 constituting parts 5a of unit, and as shown in figure 10, the mixing machine 5A of these other modes is forming in this point different from the embodiment described above by 4 constituting parts 5a of unit.Constituent parts constituting parts 5a is same with above-mentioned mode of execution to be made up of rectification part 51, support 52, convolution portion 53, utilizes linking department to be formed as the compound constituting parts of two group.
In addition, the mixing machine 5A of the manner mode that also straight line edge 53a with when analysing and observe fan same with above-mentioned mode of execution is contacted with adjacent commutator lug 51a is set.But because the mixing machine 5A of the manner is made up of 4 constituting parts 5a of unit, therefore, it is large that the angle intervals of the adjacent constituting parts 5a of unit becomes compared with above-mentioned mode of execution.Therefore the mode that, is contacted with adjacent commutator lug 5la with the straight line edge 53a of fan in the time analysing and observe is set fan shape and the axial angle of inclination with respect to central axis O.
In view of above content, the mixing machine 5A of the manner can obtain the action effect same with above-mentioned mode of execution.In addition, because the number of the constituting parts 5a of unit is less, therefore, the preferably Exhaust gas purifying device of pipe diameter that diminish, outlet pipe diesel engine 101 that diminish, that air displacement is smaller as the flow of Exhaust Gas.
Then, use the 2nd other modes of brief description of the drawings mixing machine 5.In addition, to the structure same with above-mentioned mode of execution, mark identical reference character, omission explains.
The mixing machine 5B of the manner compoundly forms material and forms by 5.In the mixing machine 5 of above-mentioned mode of execution, thereby utilize linking department 54 to link the constituting parts 5a of Liang Ge unit and form compound constituting parts 5b, with respect to this, in the mixing machine 5B of these other modes, as shown in Figure 11, Figure 12, be linked to commutator lug 55b (rectification part 55) by the unit constituting parts being formed by commutator lug 55a (rectification part 55) and convolution portion 56 and form compound constituting parts.That is to say, in the mixing machine 5B of the state assembling, extend the commutator lug 55b alternately configuration in a circumferential direction that is provided with the commutator lug 55a of convolution portion 56 and does not there is convolution portion 56.In addition, the axial dimension 55La of commutator lug 55a is set to such an extent that be longer than the axial dimension 55Lb of commutator lug 55b.
In addition,, on the circular arc edge of convolution portion 56, utilize otch 57 to be formed with step.By this otch 57 is set, between the internal face 14a of straight line shape pipe portion 14 and mixing machine 5B, be formed with gap, flow in this gap by Exhaust Gas, be formed with direct flow road.
In addition, by otch 57 being located to the boundary part between convolution portion 56 and commutator lug 55a, same with above-mentioned mode of execution, can between internal face 14a and mixing machine, form the gap of ring-type, can form in the downstream side in gap the direct flow road of tubular.
In view of above content, the mixing machine 5B of present embodiment can obtain the action effect same with above-mentioned mode of execution.
Utilizability in industry
The utility model can be applied to the vent systems of diesel engine.
Claims (14)
1. an Exhaust gas purifying device (1), the upstream side of its chamber portion (16) is communicated in the downstream side of straight line shape pipe portion (14) via curved sections of pipe (15), in this chamber portion (16), be equipped with catalyzer (6), it is characterized in that
In above-mentioned straight line shape pipe portion (14), dispose mixing component (5).
2. Exhaust gas purifying device according to claim 1, is characterized in that,
Above-mentioned mixing component (5) comprises along the tabular rectification part (51) of the flow direction configuration of Exhaust Gas.
3. Exhaust gas purifying device according to claim 2, is characterized in that,
Above-mentioned rectification part (51) is made up of plate-like members.
4. according to the Exhaust gas purifying device described in claim 2 or 3, it is characterized in that,
Above-mentioned rectification part (51) extends in its downstream side the convolution portion (53) that is provided with,
This convolution portion (53) is formed obliquely with the angle of being scheduled to respect to flow direction.
5. Exhaust gas purifying device according to claim 1, is characterized in that,
The outlet pipe (14) that above-mentioned straight line shape pipe portion (14) is internal-combustion engine,
Above-mentioned mixing component (5) comprising:
Rectification part (51), it is made up of multiple commutator lugs (51a), the plurality of commutator lug (51a) from the central axis (O) of above-mentioned outlet pipe (14) to radial outside and along the axial formation of this outlet pipe (14), and, in a circumferential direction with equal angles arranged spaced
Support (52), it extends and arranges to radial outside from the radial outside end of each commutator lug (51a), and, be connected to the internal face (14a) of this outlet pipe (14),
Convolution portion (53), it is with respect to being axially formed obliquely the dirty side at each commutator lug (51a) with the angle of being scheduled to.
6. Exhaust gas purifying device according to claim 5, is characterized in that,
Above-mentioned mixing component (5) has multiple units constituting partss (5a), and this unit constituting parts (5a) has the above-mentioned commutator lug of a group (51a) and the above-mentioned convolution portion (53) of becoming,
Be provided with linking department (54) in the central side end of each commutator lug (51a),
Constituent parts constituting parts (5a) is connected by this linking department (54).
7. Exhaust gas purifying device according to claim 6, is characterized in that,
Above-mentioned mixing component (5) has multiple compound constituting partss (5b), utilize above-mentioned linking department (54) two above-mentioned unit constituting partss (5a) to be formed to this compound constituting parts (5b) taking above-mentioned central axis (O) as the mode of symmetry axis ground wire symmetry links
Each linking department (54) of these compound constituting partss (5b) is disposed at different positions in the axial direction of above-mentioned outlet pipe (14),
These compound constituting partss (5b) are intersected, are assembled with equal angles compartment of terrain by each linking department (54).
8. according to the Exhaust gas purifying device described in any one in claim 5～7, it is characterized in that,
Above-mentioned support (52) is tabular extension and arranges from above-mentioned rectification part (51), and the internal face along above-mentioned outlet pipe (14) bends (14a), the plate face of this support (52) is connected to this internal face (14a).
9. according to the Exhaust gas purifying device described in any one in claim 5～7, it is characterized in that,
Above-mentioned convolution portion (53) is formed as: between this convolution portion (53) and the internal face (14a) of above-mentioned outlet pipe (14), form gap (14c) with the size of being scheduled to.
10. Exhaust gas purifying device according to claim 1, is characterized in that,
The outlet pipe (14) that above-mentioned straight line shape pipe portion (14) is internal-combustion engine,
Above-mentioned mixing component (5) comprising:
Convolution portion (53), it forms by this way: between this convolution portion (53) and the internal face (14a) of above-mentioned outlet pipe (14), form gap (14c) with the size of being scheduled to,
In the time that Exhaust Gas flows in above-mentioned outlet pipe (14), form direct flow road (21) and convolution stream (22), this direct flow road (21) is tubular and is formed on the downstream side of this gap (14c), in direct flow road (21), Exhaust Gas is along the axial flow of the central axis (O) of this outlet pipe (14); This convolution stream (22) is formed on the cylinder inner side on this direct flow road (21), and in convolution stream (22), Exhaust Gas flows with respect to this ground that axially circles round of this central axis (O).
11. Exhaust gas purifying devices according to claim 10, is characterized in that,
The radial dimension in above-mentioned gap (14c) is set as constant in a circumferential direction.
12. according to the Exhaust gas purifying device described in claim 10 or 11, it is characterized in that,
Above-mentioned mixing component (5) has from above-mentioned convolution portion (53) to radial outside and extends the support (52) arranging,
Utilize this support (52), this convolution portion (53) is positioned at the position of leaving from the above-mentioned internal face (14a) of this outlet pipe (14), and this mixing component (5) is held in above-mentioned outlet pipe (14).
13. according to the Exhaust gas purifying device described in claim 10 or 11, it is characterized in that,
Above-mentioned mixing component (5) has multiple above-mentioned convolution portions (53),
This convolution portion (53) is centered by above-mentioned axis (O), in a circumferential direction with equal angles arranged spaced.
14. according to the Exhaust gas purifying device described in claim 10 or 11, it is characterized in that,
Above-mentioned convolution portion (53) at its upstream side is provided with tabular rectification part (51), and this rectification part arranges along extending axially of above-mentioned central axis (O).
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013158676A JP6077963B2 (en) | 2013-07-31 | 2013-07-31 | Exhaust purification device |
| JP2013-158676 | 2013-07-31 | ||
| JP2013158677A JP6046568B2 (en) | 2013-07-31 | 2013-07-31 | Exhaust purification device |
| JP2013-158673 | 2013-07-31 | ||
| JP2013158673A JP6347474B2 (en) | 2013-07-31 | 2013-07-31 | Exhaust purification device |
| JP2013-158677 | 2013-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203978582U true CN203978582U (en) | 2014-12-03 |
Family
ID=51976039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420354201.7U Expired - Lifetime CN203978582U (en) | 2013-07-31 | 2014-06-27 | Exhaust gas purifying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203978582U (en) |
-
2014
- 2014-06-27 CN CN201420354201.7U patent/CN203978582U/en not_active Expired - Lifetime
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| C14 | Grant of patent or utility model | ||
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