CN104879197A - Exhaust pipe mounting device of ejector - Google Patents
Exhaust pipe mounting device of ejector Download PDFInfo
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- CN104879197A CN104879197A CN201510167024.0A CN201510167024A CN104879197A CN 104879197 A CN104879197 A CN 104879197A CN 201510167024 A CN201510167024 A CN 201510167024A CN 104879197 A CN104879197 A CN 104879197A
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- sparger
- outlet pipe
- radiator
- pipe mounting
- heat
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Abstract
The invention discloses an exhaust pipe mounting device of an ejector. The exhaust pipe mounting device of the ejector comprises the ejector, a heat sink, an exhaust pipe mounting flange and the like, wherein the heat sink is connected with the exhaust pipe mounting flange through a transitional clamping seat; an annular flange with a throat on the top of the transitional clamping seat is connected with an end surface flange of the heat sink indirectly in a force transfer mode at least; a conical lug boss which extends to space below the surface of the exhaust tube mounting flange and a sealing lug boss which is in compaction contact with the exhaust pipe mounting flange through a metal heat-insulation gasket are arranged in the middle of the bottom of the transitional clamping seat; and the conical lug boss and the sealing lug boss form an inverted-step structure downwards on the bottom of the transitional clamping seat. A plurality of heat-insulation air cavities are formed through the transitional clamping seat with the special structure, the heat sink with the special structure, a heat-insulation gasket and the metal heat-insulation gasket, high-temperature exhaust of an engine or heat exchange of the wall of the exhaust pipe to the ejector can be stopped and reduced effectively, and the using temperature range of the ejector is normal. The exhaust pipe mounting device of the ejector is high in structural strength and flexible to mount, and is simple and reliable; and the ejection position can be adjusted as needed.
Description
Technical field
The present invention relates to a kind of outlet pipe erecting device of sparger, be applicable to the sparger directly installing Electromagnetic Drive on engine exhaust pipe, ensure that sparger can not cause because of exhaust high temperature overheated.Related domain belongs to motor vehicle exhaust emission control technique field.
Background technique
Increasingly serious along with environmental problem and energy crisis, Abgasgesetz increasingly stringent, increasing energy-conserving and emission-cutting technology is used on vehicle, wherein SCR(selective catalytic reduction) technology is a kind of technology reducing oxynitride discharge.Reducing agent is injected in engine exhaust stream by SCR technology exactly, and reducing agent reacts with the oxynitrides in exhaust and generates nitrogen and water in SCR catalytic converter afterwards, thus reaches purification object.But the impact of high-temperature exhaust air can be subject to for the sparger of injection reduction agent, make the overheated of sparger, solenoid valve temperature is too high and lost efficacy, and even causes the catastrophe failure that sparger burns.
At present, in order to avoid the temperature of sparger is too high, for ensureing that the temperature of sparger is in normal range (NR) on market, most of product on market, be to be cooled sparger by cooling water or adopt pressurized air to carry out pressure cooling, such as: the cooling means described in patent CN200410004472.0, mainly adopt cooling water to cool sparger, when opening separately pressurized air not spraying, also pressure cooling is carried out to sparger.Patent CN10220984A, WO2012107484(A1), the cooling means described in CN201010100199.7, CN201010275693.7, mainly cooling chamber is set, by cooling water, sparger is cooled.Cooling means described in patent CN201010541488.0, mainly utilizes the thermal shield of cooling water and special shape, cools sparger.
The method utilizing cooling water to cool sparger, need to increase cooling line, cooling heat radiator also needs to process coolant flow channel, adds complexity and the manufacture cost of system.The product adopting pressurized air to cool sparger, needs a large amount of pressurized air, brings certain potential safety hazard or separately need establish air pump, and setting up air pump, turn increase complexity and the cost of system to brake system.
But market also there is small part product, adopts natural air cooled mode to cool sparger, such as: the method described in patent CN200780006778.1, mainly utilize heat insulation, the radiating structure of special construction to cool sparger.Main special construction is the sleeve member with elongated thin-walled attachment portion, is metal forming part, the Z-shaped or C type in cross section.There is the sleeve member of elongated thin-walled attachment portion, mainly reduce high-temperature exhaust air from following two aspects to conduct to the heat of sparger: one is, heat must flow through from described sleeve member, and the sleeve member with elongated thin-walled attachment portion forms one " hot throttle valve ", thus hinder the conduction of heat; Two are, the sleeve member with elongated thin-walled attachment portion adds the area of contact with air, adds thermolysis.
This structure can reduce the heat that high-temperature exhaust air passes to sparger, but this kind of elongated, thin sleeve member of wall due to the intensity of structure not high, poor to the adaptability of engine exhaust vibration, affect the working life of injection apparatus, and be press-fitted all-in-one-piece structure, eject position can not be adjusted according to actual needs and flexibly.
Summary of the invention
The object of the invention is for the existing sparger cooling heat radiator type of cooling, a kind of outlet pipe erecting device of sparger is provided, not only the temperature of sparger is ensured in normal scope, the structural strength of whole cooling heat radiator is high, simple and reliable, and makes the mounting point of sparger flexible.
This object passes through cooling heat dissipation and the erecting device realization of sparger of the present invention.Key character of the present invention is described further below and shown in the drawings.
Be arranged on the sparger on outlet pipe, not only its head directly contacts with high-temperature exhaust air and is heated in the course of the work, and is subject to the heat transfer of other structures and is heated.The present invention is by arranging the multiple heat insulation air cavity of the transition deck of special construction and radiator, mat insulation and formation, can effectively block and reduce engine high-temperature exhaust air or outlet pipe to the heat exchange of sparger, ensure that the temperature of sparger is in normal scope.
A kind of outlet pipe erecting device of sparger, comprise sparger, radiator, outlet pipe mounting flange etc., described radiator inside is provided with sparger, described radiator is connected with outlet pipe mounting flange by transition deck, the end flanges of annular flange and radiator that the top of described transition deck has larynx neck is connected with mode of transfer force at least indirectly, block state transition seat bottom have circumference symmetrical at least 3 bolt blocks be connected with outlet pipe mounting flange in order to fastening means, described transition deck center bottom has the cone boss stretching into below outlet pipe mounting flange face, and undertaken compressing the seal boss contacted by metallic insulation packing ring and outlet pipe mounting flange, described cone boss and seal boss form inverted steps structure downwards in transition deck bottom.
Metallic insulation packing ring is provided with between the seal boss of transition deck and outlet pipe mounting flange upper-end surface.The setting of metallic insulation packing ring, avoid outlet pipe mounting flange to contact with the direct of seal boss, decrease the heat conducted to transition deck by outlet pipe mounting flange, the deck of transition is simultaneously by being connected with outlet pipe mounting flange with fastening means at least 3 bolt blocks that circumference is symmetrical.Bolt block, further in order to reduce the conduction of heat, to being outside equipped with corner cut, not only reduces the area of contact of transition deck and outlet pipe mounting flange, and adds the pretightening force of cooling heat radiator installation.
The cone boss of transition deck and seal boss, metallic insulation packing ring form the first heat insulation air cavity, serve good heat-blocking action.Between the annular flange of transition deck and end flanges, mat insulation is set, decreases transition deck and conduct to the heat of radiator.The external cylindrical surface of the hollow projecting shaft of described radiator is cut into regular polygon simultaneously, and circumference is by ring cutting at least 1 resistance heating slot.Make the contact in hollow projecting shaft and annular flange inner step hole become the strip shaped contact of multiple small size from large-area contact, increase " hot-fluid resistance " effect, reduce the heat transfer of transition deck to radiator.
The mat insulation arranged between the hollow projecting shaft of radiator and the shoulder hole step surface of transition deck prevents high-temperature exhaust air to flow in the axial direction along the gap between sparger and radiator endoporus, decreases the heat transfer of high-temperature exhaust air to sparger.
Between the hollow projecting shaft of sparger neck and radiator, there is seal ring, arranging of seal ring prevents high-temperature exhaust air along gap flowing in the axial direction between sparger and radiator endoporus further, and form heat insulation air cavity between the endoporus of seal ring and radiator, mat insulation, sparger, further reduce heat transfer, reduce the temperature of sparger.
Preferred: the high temperature resistant silicon dioxide aerogel heat-insulating sheet that the preferred thermal conductivity of described mat insulation is extremely low.
Preferred: the external cylindrical surface of hollow projecting shaft is cut into regular polygon, and regular polygon is preferably regular hexahedron.
The present invention forms multiple heat insulation air cavity by the transition deck and radiator, mat insulation and metallic insulation packing ring arranging special construction, can effectively block and reduce engine high-temperature exhaust air or exhaust wall to the heat exchange of sparger, ensure that sparger is within the scope of normal serviceability temperature.And the transition deck of different central position can be selected according to actual needs, adjustment eject position, flexible for installation.In addition, the cooling heat radiator structural strength of this sparger is high, simple and reliable.
Accompanying drawing explanation
Fig. 1 is the normal cross section schematic diagram of structure of the present invention.
Fig. 2 is the plan view of transition deck in structure of the present invention.
Fig. 3 is the axonometric drawing of transition deck in structure of the present invention.
Fig. 4 is the structural representation of radiator in structure of the present invention.
Fig. 5 is the structural representation of metallic insulation packing ring in structure of the present invention.
Description of reference numerals:
1-cooling heat dissipation erecting device; 2-sparger; 3-radiator; 4-seal ring; 5-mat insulation; The heat insulation air cavity of 6-; 7-mat insulation; 8-transition deck; 9-metallic insulation packing ring; The heat insulation air cavity of 10-; 11-is vented; 12-outlet pipe mounting flange; 13-bolt; 14-clip; 15-bolt; 16-pad; 17-pipe joint; 18-bolt; 19-seal ring; 20-thermal baffle.
Embodiment
Fig. 1-3 is that the one of the outlet pipe erecting device of sparger implements structural representation, cooling heat dissipation erecting device 1, comprise sparger 2, radiator 3, outlet pipe mounting flange 12 etc., described radiator 3 is connected with outlet pipe mounting flange 12 by transition deck 8, the end flanges 3-2 of annular flange 8-4 and radiator 3 that the top of described transition deck 8 has larynx neck is connected with mode of transfer force at least indirectly, block state transition seat 8 bottom have circumference symmetrical at least 3 bolt block 8-3 be connected with outlet pipe mounting flange 12 in order to fastening means, described transition deck 8 center bottom has the cone boss 8-1 stretching into outlet pipe mounting flange less than 12, and undertaken compressing the seal boss 8-2 contacted by metallic insulation packing ring 9 and outlet pipe mounting flange 12, described cone boss 8-1 and seal boss 8-2 forms inverted steps structure downwards in transition deck 8 bottom.
As shown in Fig. 1,4, the external cylindrical surface of the hollow projecting shaft 3-1 of described radiator 3 is cut into regular polygon, and circumference is by ring cutting at least 1 resistance heating slot 3-4, described radiator 3 inside is provided with sparger 2, and the extension of described sparger 2 runs through the mesopore of the inner step hole 8-6 of the annular flange 8-4 of described transition deck 8 and the inverted steps structure of bottom.Described transition deck 8 top is connected with mode of transfer force with the flange 3-2 on radiator 3 at least indirectly by the annular flange 8-4 of band larynx neck, according to a kind of favourable mode, connects in the mode of power transmission preferably by clip 14.
The working principle of the cooling of sparger cooling heat radiator, heat radiation is described with reference to the accompanying drawings.High-temperature exhaust air conducts and is mainly divided into three aspects to the heat of sparger 2 and related components thereof, respectively called after first hot-fluid, the second hot-fluid, the 3rd hot-fluid.
First hot-fluid is the heat of high-temperature exhaust air by conducting with sparger 2 head contact mainly, by the housing of sparger 2 is made a kind of thin shell piece, make it have well " hot-fluid resistance " effect, therefore the first hot-fluid is very little to the heat effect of sparger 2, the reducing agent simultaneously in the injected device 2 of a part of heat absorbs.
Second hot-fluid is conducted to the heat of transition deck 8 by outlet pipe mounting flange 12.The present invention, by following measures, decrease conduction to the heat of transition deck 8, and then less conduction is to the heat of sparger 2.A kind of embodiment of concrete measure is as follows:
First, by the seal boss 8-2 at transition deck 8, metallic insulation packing ring 9 is set between axial end and outlet pipe mounting flange 12, and the mode that three at least connects with power transmission connects.And the lower end surface of the cone boss 8-1 of transition deck 8 is connected in the mode of power transmission with metallic insulation packing ring 9, thus seal high-temperature exhaust air, and form heat insulation air cavity 10 at the cone boss 8-1 of transition deck 8 and seal boss 8-2, metallic insulation packing ring 9.The setting of metallic insulation packing ring 9, seal exhaust 12, completely cut off the cone boss 8-1 of transition deck 8 and the contact of high-temperature exhaust air 12, completely cut off transition deck 8 and contacted with the direct of outlet pipe mounting flange 12, decrease conduction to a certain extent to the heat of transition deck 8.Simultaneously heat insulation air cavity 10 also further reduces high-temperature exhaust air 12 and conducts to the heat of transition deck 8.
As shown in Figure 5, described metallic insulation packing ring 9 has radial the umbrella-shaped portion 9-1, the bowl-shape region 9-2 and fold 9-3 that extend inwards, and is evenly distributed on plication region 9-3 periphery at least 2 buckle 9-4.Very little gap is there is between the free edge of described umbrella-shaped portion 9-1 and sparger 2.Described plication region 9-3 is provided with at least 1 fold, reduces area of contact and the vibration of being transmitted by outlet pipe mounting flange 12 that decays, extends the working life of cooling heat radiator.
Secondly, transition deck 8 bottom is by being connected with outlet pipe mounting flange 12 with fastening means at least 3 bolt block 8-3 that circumference is symmetrical, simultaneously at bolt block 8-3 to being outside equipped with corner cut 8-5, reduce transition deck 8 and the area of contact of outlet pipe mounting flange 12 upper-end surface, add the pretightening force that cooling heat radiator is installed.
Decreased the heat passing to transition deck 8 by above measure, increase the heat dissipation potential of fin 3-3 simultaneously, thus increase the heat radiation to sparger 2.Specifically describe as follows:
The first, between the annular flange 8-4 and end flanges 3-2 of transition deck 8, be provided with mat insulation 7, avoid annular flange 8-4 and contact with the direct of end flanges 3-2, reduce transition deck 8 and conduct to the heat of radiator 3.
Second, the external cylindrical surface of the hollow projecting shaft 3-1 of described radiator 3 is cut into regular polygon, and circumference is by ring cutting at least 1 resistance heating slot 3-4, the contact of hollow projecting shaft 3-1 outer cylinder and shoulder hole 8-6 inner cylindrical surface is made to have become the strip shaped contact of multiple small size from large-area contact, increase " hot-fluid resistance " effect, decrease conduction to the heat of radiator 3, the preferred regular hexahedron of regular polygon.
3rd, be provided with mat insulation 7 between the lower end surface of the hollow projecting shaft 3-1 of described radiator 3 and step hole 8-6 bottom surface, reduce conduction to the heat of radiator 3.
4th, form heat insulation air cavity 6 between the endoporus of seal ring 4, mat insulation 7, sparger 2, radiator 3, further reduce heat transfer.Meanwhile, between the flange 3-2 section that seal ring 4 is arranged on radiator 3 endoporus and sparger 2, prevent high-temperature exhaust air flowing axially in gap between sparger 2 and radiator 3 endoporus, reduce thermoconvection effect.
5th, radiator 3 is formed by the intermetallic composite coating manufacture that thermal conductivity is very high, especially fin 3-3.
Described radiator 3 lower end surface is connected with thermal baffle 20 by least 2 bolts 15.When sparger 2 and cooling heat radiator 1 are installed at a certain angle with outlet pipe, thermal baffle 20 decreases the radoal heating of high-temperature exhaust pipe to cooling heat radiator.
The high temperature resistant silicon dioxide aerogel heat-insulating sheet that the preferred thermal conductivity of mat insulation 5,7 is extremely low.
The annular flange 8-4 of transition deck 8 and the central position of shoulder hole 8-6 overlap, and its central position can change on axis of symmetry A.Be illustrated in figure 3 a kind of embodiment of central position on transition deck 8, described annular flange 8-4, the central position of shoulder hole 8-6, according to different eject position, the transition deck 8 of different central position can be selected, make the cooling heat radiator of sparger flexible for installation, simple and reliable.
The positioning hole 8-7 that the annular flange 8-4 of described transition deck 8 is arranged, is equipped with locating stud, can prevents the rotation of transition deck more than 8 device.
Described radiator 3 upper-end surface is fixed with pipe joint 17 by least 2 bolts 18, and is provided with pad 16 between pipe joint 17 and radiator 3.
Described seal ring 4 is made up of resistant to elevated temperatures rubber material.
Claims (10)
1. the outlet pipe erecting device (1) of a sparger, comprise sparger (2), radiator (3), outlet pipe mounting flange (12), described radiator (3) inside is provided with sparger (2), described radiator (3) is connected with outlet pipe mounting flange (12) by transition deck (8), it is characterized in that: the end flanges (3-2) of annular flange (8-4) and radiator (3) that the top of described transition deck (8) has larynx neck is connected with mode of transfer force at least indirectly, described transition deck (8) bottom has symmetrical at least 3 bolt blocks (8-3) be connected with outlet pipe mounting flange (12) in order to fastening means of circumference, described transition deck (8) center bottom has the cone boss (8-1) stretching into below outlet pipe mounting flange (12) face, and carry out compressing the seal boss (8-2) contacted with outlet pipe mounting flange (12) by metallic insulation packing ring (9), described cone boss (8-1) and seal boss (8-2) form inverted steps structure downwards in transition deck (8) bottom.
2. the outlet pipe erecting device of sparger according to claim 1, is characterized in that: form heat insulation air cavity (10) between the cone boss (8-1) of described transition deck (8) and seal boss (8-2), metallic insulation packing ring (9);
Between the hollow projecting shaft (3-1) of described sparger (2) neck and radiator (3), there is seal ring (4); Described transition deck (8) has shoulder hole (8-6), between hollow projecting shaft (3-1) lower end surface of described radiator (3) and the step surface of shoulder hole (8-6), is provided with mat insulation (7); Heat insulation air cavity (6) is formed between the hollow projecting shaft (3-1) of described radiator (3) and seal ring (4), mat insulation (7), sparger (2) neck.
3. the outlet pipe erecting device of sparger according to claim 2, it is characterized in that: the annular flange (8-4) of described transition deck (8) and the central position of shoulder hole (8-6) overlap, and its central position can adjust on the symmetry plane perpendicular to transition deck (8) top.
4. the outlet pipe erecting device of sparger according to claim 1, is characterized in that: be provided with mat insulation (5) between the axial end of the annular flange (8-4) of described transition deck (8) and the end flanges (3-2) of radiator (3).
5. the outlet pipe erecting device of sparger according to claim 2, is characterized in that: the extension of described sparger (2) runs through the mesopore of the inner step hole (8-6) of the annular flange (8-4) of described transition deck (8) and the inverted steps structure of bottom.
6. the outlet pipe erecting device of the sparger according to any one of claim 1-5, it is characterized in that: described metallic insulation packing ring (9) have radial extend inwards umbrella-shaped portion (9-1), bowl-shape region (9-2) and fold (9-3), and be evenly distributed on plication region (9-3) periphery at least 2 buckles (9-4).
7. the outlet pipe erecting device of sparger according to claim 6, is characterized in that: there is gap between the free edge of described umbrella-shaped portion (9-1) and sparger (2); Described plication region (9-3) is provided with at least 1 fold.
8. the outlet pipe erecting device of sparger according to claim 1, is characterized in that: the annular flange (8-4) of described transition deck (8) is provided with positioning hole (8-7).
9. the outlet pipe erecting device of sparger according to claim 1, is characterized in that: the fin (3-3) on described radiator (3) is made up of the metal that thermal conductivity is very high; Described radiator (3) is connected by least 2 bolts (15) with thermal baffle (20); Described radiator (3) upper-end surface is fixed with pipe joint (17) by least 2 bolts (18).
10. the outlet pipe erecting device of sparger according to claim 2, is characterized in that: described seal ring (4) is made up of resistant to elevated temperatures rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510167024.0A CN104879197B (en) | 2015-04-09 | 2015-04-09 | A kind of exhaust pipe erecting device of injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510167024.0A CN104879197B (en) | 2015-04-09 | 2015-04-09 | A kind of exhaust pipe erecting device of injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104879197A true CN104879197A (en) | 2015-09-02 |
| CN104879197B CN104879197B (en) | 2018-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510167024.0A Active CN104879197B (en) | 2015-04-09 | 2015-04-09 | A kind of exhaust pipe erecting device of injector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100701A (en) * | 2016-02-22 | 2017-08-29 | 天纳克（苏州）排放系统有限公司 | Nozzle assembly |
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| CN1560439A (en) * | 2004-02-27 | 2005-01-05 | 清华大学 | Apparatus for supplying reducing agent to hydroxide catalyzing transforming device of internal combustion engine |
| JP2005105913A (en) * | 2003-09-30 | 2005-04-21 | Nissan Diesel Motor Co Ltd | Exhaust emission control device of engine |
| CN101346535A (en) * | 2005-12-21 | 2009-01-14 | 罗伯特·博世有限公司 | Exhaust gas aftertreatment device |
| CN101389836A (en) * | 2006-12-28 | 2009-03-18 | 罗伯特·博世有限公司 | Selective catalytic reduction injection device |
| DE102009028030A1 (en) * | 2009-07-27 | 2011-02-03 | Robert Bosch Gmbh | Assembly unit for fixing an injection member to an exhaust line and exhaust aftertreatment device |
| DE102010040003A1 (en) * | 2010-08-31 | 2012-03-01 | Robert Bosch Gmbh | Selective catalytic reduction dosing device for introducing reducing agent into flow tube of internal combustion engine, has connector having intermediate piece and cooling medium leading passage which guides flow of cooling medium |
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2015
- 2015-04-09 CN CN201510167024.0A patent/CN104879197B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005105913A (en) * | 2003-09-30 | 2005-04-21 | Nissan Diesel Motor Co Ltd | Exhaust emission control device of engine |
| CN1560439A (en) * | 2004-02-27 | 2005-01-05 | 清华大学 | Apparatus for supplying reducing agent to hydroxide catalyzing transforming device of internal combustion engine |
| CN101346535A (en) * | 2005-12-21 | 2009-01-14 | 罗伯特·博世有限公司 | Exhaust gas aftertreatment device |
| CN101389836A (en) * | 2006-12-28 | 2009-03-18 | 罗伯特·博世有限公司 | Selective catalytic reduction injection device |
| DE102009028030A1 (en) * | 2009-07-27 | 2011-02-03 | Robert Bosch Gmbh | Assembly unit for fixing an injection member to an exhaust line and exhaust aftertreatment device |
| DE102010040003A1 (en) * | 2010-08-31 | 2012-03-01 | Robert Bosch Gmbh | Selective catalytic reduction dosing device for introducing reducing agent into flow tube of internal combustion engine, has connector having intermediate piece and cooling medium leading passage which guides flow of cooling medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107100701A (en) * | 2016-02-22 | 2017-08-29 | 天纳克（苏州）排放系统有限公司 | Nozzle assembly |
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| Publication number | Publication date |
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| CN104879197B (en) | 2018-05-04 |
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