CN106150618A - Carbamide ejection assemblies - Google Patents
Carbamide ejection assemblies Download PDFInfo
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- CN106150618A CN106150618A CN201510151405.XA CN201510151405A CN106150618A CN 106150618 A CN106150618 A CN 106150618A CN 201510151405 A CN201510151405 A CN 201510151405A CN 106150618 A CN106150618 A CN 106150618A
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- carbamide
- pump
- ejection assemblies
- side wall
- pump case
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
A kind of carbamide ejection assemblies, in it includes housing and is installed on described housing and in order to pump the pump assembly of urea liquid, wherein said housing includes the first side wall, carbamide inlet union and is fixed on described the first side wall and extends outwardly beyond the carbamide outlet connection of described the first side wall.Described pump assembly includes pump case and is positioned at the pump of described pump case.Described pump is provided with the import connected with described carbamide inlet union and the outlet connected with described carbamide outlet connection.Described carbamide ejection assemblies also includes the choke valve being arranged on described delivery side of pump downstream, is exaggerated pressure, it is easy to identify.
Description
Technical field
The present invention relates to a kind of carbamide ejection assemblies, belong to motor exhaust post-processing technology field.
Background technology
That existing urea injection system includes air-assisted and non-air assist type.Wherein, the urea injection system of non-air assist type generally includes pump, filter is connected with pump metering jet and some sensors.The often requirement to metering jet of this urea injection system is the highest, and owing to metering jet is arranged on exhaustor, it easily affects measuring accuracy because of the high temperature by aerofluxus, is even burnt out by high temperature.It addition, urea liquid can freeze under cold conditions, volumetric expansion, the most how the urea liquid of residual in system is emptied, the risk that reduction system is damaged by frost, be also the problem of this system needs solution.The urea injection system of air-assisted introduces compressed air into, thus improves the effect of carbamide atomization, has obtained the favor of numerous manufacturer.
How urea injection system, at the initial stage set up, identifies whether to build that to be pressed into merit be the technical problem that industry generally exists.
Summary of the invention
It is an object of the invention to provide the carbamide ejection assemblies of a kind of readily identified pressure.
For achieving the above object, the present invention adopts the following technical scheme that a kind of carbamide ejection assemblies, in it includes housing and is installed on described housing and in order to pump the pump assembly of urea liquid, wherein said housing includes the first side wall, carbamide inlet union and be fixed on described the first side wall and extend outwardly beyond the carbamide outlet connection of described the first side wall, described pump assembly includes pump case and is positioned at the pump of described pump case, described pump is provided with the import connected with described carbamide inlet union and the outlet connected with described carbamide outlet connection, described carbamide ejection assemblies also includes the choke valve being arranged on described delivery side of pump downstream.
As further improved technical scheme of the present invention, described the first side wall is provided with the first installing hole, described carbamide outlet connection includes head, the cervical region, the latch part downwardly extended from described cervical region and the outlet downwardly extended from described latch part that downwardly extend from described head, wherein said head is wider than other parts, can be resisted against the inner side of described the first side wall；Described cervical region is held in described first installing hole；Described latch part and described outlet extend beyond described the first side wall, and the periphery of described latch part is provided with the external screw thread that matches with nut.
As further improved technical scheme of the present invention, the inner side of described latch part is provided with the accepting hole connected with described outlet, and described choke valve is contained in described accepting hole.
As further improved technical scheme of the present invention, described pump case includes the first pump case and the second pump case matched with described first pump case, described first pump case includes the first auxiliary section and the first extension extended forward from described first auxiliary section, described first extension is provided with pre-and post perforative passage, described passage connects with described delivery side of pump, and described carbamide ejection assemblies includes the first connecting pipe component connecting described passage with described carbamide outlet connection.
As further improved technical scheme of the present invention, described head is provided with the first recess, described cervical region is provided with the second recess connected with described first recess, and described first connecting pipe component includes being contained in described first recess and the first end in described second recess, the second end being contained in described passage and the first connecting tube being connected described first end and described the second end.
As further improved technical scheme of the present invention, described first end and described the second end are equipped with sealing ring.
As further improved technical scheme of the present invention, described first end is provided separately with described first connecting tube, and described first end is provided with the first agnail portion inserted in described first connecting tube；Described the second end is also provided separately with described first connecting tube, and described the second end is provided with the second agnail portion inserted in described first connecting tube.
As further improved technical scheme of the present invention, described first pump case includes from the described first upwardly extending lobe of extension, described lobe include the groove run through up and down, the stopper section being positioned at described groove side and with described channel connection and the second jack of extending upward through；Described carbamide ejection assemblies includes the first pressure transducer being arranged in described lobe, described first pressure transducer includes the first main part, the first test section extending downward beyond described first main part and the first positioning convex downwardly extended from described first main part, described first test section is housed in described second jack, described first positioning convex is buckled in described groove after rotating, and described stopper section in the vertical direction limits described first positioning convex and moves upward.
As further improved technical scheme of the present invention, described carbamide ejection assemblies includes heating assembly, and described heating assembly includes the 3rd heating blanket being wrapped in described first connecting tube.
As further improved technical scheme of the present invention, described carbamide ejection assemblies is air-assisted, and it includes being arranged on the gas inlet adapter on described the first side wall and gas outlet joint.
Compared to prior art, the present invention is provided with the choke valve being arranged on described delivery side of pump downstream, is exaggerated pressure, it is easy to identify.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of carbamide ejection assemblies of the present invention.
Fig. 2 is the schematic perspective view of another angle of Fig. 1.
Fig. 3 is the part isometric schematic diagram of Fig. 1, does not wherein show upper shell.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the part isometric exploded view of Fig. 3.
Fig. 6 is the part isometric exploded view of another angle of Fig. 5.
Fig. 7 is the further three-dimensional exploded view of Fig. 6.
Fig. 8 is the further three-dimensional exploded view of Fig. 7.
Fig. 9 is the part isometric exploded view of Fig. 3.
Figure 10 is the top view of lower house in Fig. 3.
Figure 11 is the axonometric chart of rubber sheet gasket in Fig. 6.
Figure 12 is the axonometric chart of pump assembly in Fig. 3.
Figure 13 is the axonometric chart of another angle of Figure 12.
Figure 14 is the axonometric chart of the another angle of Figure 12.
Figure 15 is the three-dimensional exploded view of Figure 12.
Figure 16 is the generalized section of Figure 15.
Figure 17 is the generalized section of pump assembly in Figure 12.
Figure 18 is the axonometric chart of the first pressure transducer in Fig. 3.
Figure 19 is the axonometric chart of the second pressure transducer in Fig. 3.
Figure 20 is the top view at initial makeup location of first, second pressure transducer in Fig. 3.
Figure 21 is the top view at final installed position of first, second pressure transducer in Fig. 3.
Figure 22 is the sectional view of line A-A along Fig. 4, and has marked flow direction.
Figure 23 is the partial enlarged drawing of circled portion in Figure 22.
Figure 24 is that Figure 23 is similar to, but does not demonstrate the first connecting pipe component.
Figure 25 is the sectional view of line B-B along Fig. 4, and has marked flow direction.
Figure 26 is the sectional view of line C-C along Fig. 4, and has marked flow direction.
Figure 27 is the sectional view of line D-D along Fig. 4, and has marked flow direction.
Detailed description of the invention
Please join shown in Fig. 1 to Fig. 9, present invention is disclosed a kind of carbamide ejection assemblies 100, it include housing 1, the filter assemblies 2 being positioned at described housing 1, in order to pump the pump assembly 3 of urea liquid, the heating assembly 4 possessing heating defrosting function and wire harness assembly 6 etc..In illustrative embodiments of the present invention, described carbamide ejection assemblies 100 is applied in the carbamide ejection assemblies of air-assisted, and it includes shown in the filled arrows that fluid path 101(is joined in Fig. 4) and gas circuit 102(join shown in the hollow arrow in Fig. 4).It is appreciated that described fluid path 101 is finally pooled to nozzle (not shown) place urea liquid of jet atomization in exhaustor with gas circuit 102, aerofluxus is carried out purified treatment.Generally including mixed two ways outside interior mixing as described fluid path 101 and the binding mode of gas circuit 102, these do not repeat them here known to for person of ordinary skill in the field being.
In illustrative embodiments of the present invention, described housing 1 includes lower house 11 and passes through, with described lower house, the upper shell 12 that screw 10 carries out assembling.Please join shown in Fig. 3, the top of described lower house 11 is provided with annular notch 111 and is held in the sealing ring 112 in described annular notch 111, to improve upper shell 12 and lower house 11 sealing property after assembling.
Please join shown in Fig. 5, described lower house 11 substantially cuboid, it includes diapire 13 and four sidewalls being connected with described diapire 13.Described four sidewalls include the second sidewall 15 that the first side wall 14 is relative with described the first side wall 14, the 3rd sidewall 16 connecting described the first side wall 14 and described second sidewall 15 and fourth sidewall 17 relative with described 3rd sidewall 16.Described diapire 13 surrounds a receiving space 18 jointly with described four sidewalls, in order to house filter assemblies 2, pump assembly 3, heating assembly 4 and wire harness assembly 6 etc..Described the first side wall 14 is provided with the first installing hole the 141, second installing hole the 142, the 3rd installing hole 143 and wire harness hole 144.In illustrative embodiments of the present invention, described first installing hole the 141, second installing hole 142 and the 3rd installing hole 143 are circular ports, and described wire harness hole 144 is square opening.Wherein, described first installing hole 141 is in order to install carbamide outlet connection 145, described second installing hole 142 is in order to install gas inlet adapter 146, and described 3rd installing hole 143 is in order to install gas outlet joint 147, and described wire harness hole 144 is in order to installation wiring joint 148.It addition, described lower house 11 is additionally provided with and the carbamide inlet union 149 of described the first side wall 14 injection mo(u)lding.
In illustrative embodiments of the present invention, described carbamide outlet connection 145, gas inlet adapter 146, gas outlet joint 147, wiring harness connector 148 and carbamide inlet union 149 are respectively positioned on the same side of described housing 1, in order to assembling.It addition, described carbamide inlet union 149 is near described 3rd sidewall 16, described carbamide outlet connection 145 is near described 4th sidewall 17.Described gas inlet adapter 146 and described gas outlet joint 147 are between described carbamide outlet connection 145 and described carbamide inlet union 149, wherein said gas inlet adapter 146 is near described carbamide outlet connection 145, described gas outlet joint 147 is near described carbamide inlet union 149, contrary with the trend of described gas circuit 102 with the trend generally making described fluid path 101.Described wiring harness connector 148 is between described carbamide outlet connection 145 and described gas inlet adapter 146.
Please join shown in Fig. 6, Figure 10 and Figure 24, described carbamide outlet connection 145 includes head 1451, the cervical region 1452, the latch part 1453 downwardly extended from described cervical region 1452 and the outlet 1454 downwardly extended from described latch part 1453 that downwardly extend from described head 1451.Described head 1451 is wider than other parts, in order to when other parts are by described first installing hole 141, make described head 1451 fix in the inner side of described the first side wall 14.Described head 1451 is provided with the first recess 1455.Described cervical region 1452 is held in described first installing hole 141, and described cervical region 1452 is provided with the second recess 1456 connected with described first recess 1455.The periphery of described latch part 1453 is provided with the external screw thread 1457 that matches with nut 1459, and the inner side of described latch part 1453 is provided with the accepting hole 1458 connected with described outlet 1454.
Please join shown in Fig. 6, described diapire 13 be provided with spaced a pair projection 131 and be formed at this to the holding tank 132 between projection 131, each of which projection 131 be all provided with oriented described holding tank 132 tilt concave surface 133 and be positioned at the fixing hole 134 outside described concave surface 133.In illustrative embodiments of the present invention, the bottom of described holding tank 132 is just concordant with the upper surface of described diapire 13.Described holding tank 132 is arranged approximately along 45 degree of overturning angles.
Described lower house 11 also includes the installation portion 19 near described 3rd sidewall 16, and described installation portion 19 connects described the first side wall 14 and described second sidewall 15.Described installation portion 19 is provided with the receiving chamber 191 connected with described carbamide inlet union 149, and described second sidewall 15 is run through in described receiving chamber 191.Described installation portion 19 is additionally provided with near described second sidewall 15 and towards the first through hole 192 of described holding tank 132 and be positioned at the second through hole 193 below described first through hole 192, and wherein said first through hole 192 is arranged side by side with described second through hole 193 in the vertical direction.In illustrative embodiments of the present invention, described first through hole 192 is arranged along 45 degree of overturning angles as described second through hole 193.It addition, described installation portion 19 also includes the outlet passageway 194 connected with described second through hole 193, described outlet passageway 194 connects with described gas outlet joint 147.Described installation portion 19 is provided with the installation base 195 near described the first side wall 14.Described installation base 195 includes the recess 1951 opened to described 4th sidewall 17 and is positioned at the stop wall 1952 above described recess 1951, and described recess 1951 extends upward through.Described installation portion 19 is additionally provided with the first jack 1953 connecting with described outlet passageway 194 and extending upward through and is positioned at the described first bottom-right screw hole of jack 1,953 1954.
Please join shown in Fig. 7 and Figure 25, described filter assemblies 2 includes the filling block 21 being housed in successively in described receiving chamber 191, is positioned at the filter element 22 above described filling block 21 and the lid 23 matched with described filter element 22.In illustrative embodiments of the present invention, described lid 23 uses threaded engagement, to facilitate dismounting with described installation portion 19, it is simple to change filter element 22, saves maintenance cost.Please join shown in Figure 20, the filter assemblies 2 of the present invention is for going out formula in entering outward, the most in use, urea liquid upwards circulates from the gap between described filling block 21 and described receiving chamber 191, then urea liquid ecto-entad again penetrates described filter element 22, finally leave from outlet 231, enter described first through hole 192.
It should be noted that under cold conditions, urea liquid can freeze, volumetric expansion.The risk of described installation portion 19 may be burst to reduce urea liquid after freezing, present invention employs anti-freeze design, i.e. add described filling block 21.It addition, because adding described filling block 21, correspondingly, described receiving chamber 191 just diminishing in order to accommodating the volume of urea liquid, this reduces the requirement of pumpability to pump assembly 3, simplifying design.In illustrative embodiments of the present invention, described filling block 21 is non deformable duroplasts, with cost-effective.It will be appreciated, of course, that in other embodiments, described filling block 21 can also use has certain elastic soft material.
Please join shown in Fig. 4, described pump assembly 3 is inclined in described housing 1, substantially parallel with a diagonal of described housing 1.Please join shown in Figure 12 to Figure 17, described pump assembly 3 includes pump case 31, the pump 32 being positioned at described pump case 31 and in order to the retainer ring 33 being fixed on described diapire 13 by described pump case 31.Its interior pump 32 can be played a good protection by described pump case 31.
Described pump case 31 includes the first pump case 311 and the second pump case 312 matched with described first pump case 311.In illustrative embodiments of the present invention, described first pump case 311 is made up of metal material, on the one hand can bear the high pressure at pump discharge；On the other hand heat radiation it is easy to, to reduce the heat impact on the precision of pump 32；Described second pump case 312 is substantially made up of insulant (such as plastics), it is simple to the contact pin 321 of pump 32 passes, it is to avoid short circuit, is detailed later.Although it should be noted that described second pump case 312 is substantially made up of insulant, but in order to improve assembling intensity, can embedding in the position of screw hole and have female metal nuts.
Described first pump case 311 include the first auxiliary section 313, from described first auxiliary section 313 forward one extend the first extension 314 and from the described first upwardly extending lobe of extension 314 315.Described first auxiliary section 313 includes chamber 3131, the first depressed part 3132 being connected with described chamber 3131 on its interior and is positioned at the air flue 3133 below described first depressed part 3132.Please join shown in Figure 14, described first auxiliary section 313 also includes that protuberance 3134 on the side, described protuberance 3134 include being positioned at the air inlet 3135 of centre and being positioned at the screwed hole 3136 of the described upper and lower both sides of air inlet 3135.In illustrative embodiments of the present invention, described air inlet 3135 connects with described chamber 3131, and described chamber 3131 connects with described air flue 3133 again, finally makes described air inlet 3135 connect with described air flue 3133.Please join shown in Figure 15 and Figure 16, described first pump case 311 also includes the check valve 3137 being contained in described air flue 3133.Please join shown in Figure 17, in illustrative embodiments of the present invention, described air flue 3133 includes horizontal air flue 3138 and vertical air flue 3139, and wherein said check valve 3137 is housed in described horizontal air flue 3138.
Described first extension 314 is provided with passage 3141 that is pre-and post perforative and that connect with described first depressed part 3132.Described air flue 3133 forward and upwardly extends, to connect with passage 3141.It addition, described first extension 314 is additionally provided with the recess 3142 being positioned at described air flue 3133 both sides.Described lobe 315 includes the groove 3151 opened to described 4th sidewall 17 and is positioned at the stopper section 3152 of described groove 3151 side, and described groove about 3151 runs through.Described lobe 315 is additionally provided with the second jack 3153 connecting with described passage 3141 and extending upward through.
Described second pump case 312 includes contact pin portion 317 that the second auxiliary section 316, upper end from described second auxiliary section 316 extend back and extends back from described second auxiliary section 316 and be positioned at the second extension 318 below described contact pin portion 317.Described second auxiliary section 316 realizes being connected by being positioned at the bolt 319 in four corners with described first auxiliary section 313.In order to strengthen sealing, described second auxiliary section 316 is provided around at the mounting groove 3161 of its end face and is held in the sealing ring 3162 in described mounting groove 3161.Described second extension 318 is provided with the second depressed part 3181 running through described second auxiliary section 316, the first adapter 3182 and the second adapter 3183 extended back from described second depressed part 3181, wherein said first adapter 3182 is positioned at the upper end of described second adapter 3183, and described second adapter 3183 is connected with described air flue 3133.
Please join shown in Figure 16 and Figure 17, in illustrative embodiments of the present invention, described pump 32 is plunger displacement pump, it includes the piston component 323 that back-moving spring 322 compresses with described back-moving spring 322 phase, the check valve assembly 324 being positioned at described piston component 323 front end and is wrapped in the coil 325 of described piston component 323 periphery, described contact pin 321 is connected with described coil 325, to provide electric power.Described pump 32 is provided with the import 326 being positioned at its rear end and the outlet 327 being positioned at its front end.
Please join shown in Fig. 9, described retainer ring 33 includes second press section 332 spaced with described first press section 331, the first press section 331 and is connected a pair department of assembly 333 of described first press section 331 and described second press section 332, and wherein said first press section 331 is respectively provided with the inner surface of arc-shaped to match with described first extension 314 with described second press section 332.Described first press section 331 has hollow-out parts 334 with the centre of described second press section 332, and described lobe 315 extends up through described hollow-out parts 334.Described department of assembly 333 is substantially in tabular, and it includes the installing hole 335 corresponding with described fixing hole 134.
Please join shown in Figure 17, during assembling, the front end of described pump 32 is contained in described first depressed part 3132, and the rear end of described pump 32 is contained in described second depressed part 3181, the import 326 of described pump 32 connects with described first adapter 3182, and the outlet 327 of described pump 32 connects with described passage 3141.
Further, when being installed on described lower house 11 by described pump case 31, described first adapter 3182 is contained in described first through hole 192, and described second adapter 3183 is contained in described second through hole 193.Finally, utilize screw 336 through described installing hole 335 and the fixing hole 134 of correspondence, by described retainer ring 33, described pump case 31 is fixed.
It should be noted that in illustrative embodiments of the present invention, when being installed on described lower house 11 by described pump case 31, location can have been realized by described first adapter 3182 and described second adapter 3183.In order to avoid crossing location, in illustrative embodiments of the present invention, described housing 1 also includes being positioned at above described holding tank 132 and be supported on the rubber sheet gasket 135 on described concave surface 133.Described rubber sheet gasket 135 has the upper surface 1351 of arc-shaped and is positioned at the first location division 1352 and the second location division 1353 of described upper surface 1351 both sides.The upper surface 1351 of described arc-shaped is in order to support the first extension 314 of described pump case 31.Described first location division 1352 and described second location division 1353 all downwardly extend, and respectively in order to be held in two ends before and after each projection 131.Described rubber sheet gasket 135 possesses certain elasticity, it is possible to absorb vibrations, it is to avoid cross location etc..
Please join shown in Fig. 4 to Fig. 9, Figure 23, Figure 24, described carbamide ejection assemblies 100 also includes the first connecting pipe component 51 connecting described passage 3141 with described carbamide outlet connection 145.Described first connecting pipe component 51 includes the choke valve 511 being contained in described accepting hole 1458, the first end 512 being contained in described first recess 1455 and the second recess 1456, the second end 513 being contained in described passage 3141 and connects the first connecting tube 514 of described first end 512 and the second end 513.In order to strengthen sealing, described first end 512 and the second end 513 are equipped with sealing ring 515.In illustrative embodiments of the present invention, described first end 512 is two elements being provided separately with described first connecting tube 514, and described first end 512 is provided with the first agnail portion 5121 inserted in described first connecting tube 514；Similarly, described the second end 513 is also two elements being provided separately with described first connecting tube 514, and described the second end 513 is provided with the second agnail portion 5131 inserted in described first connecting tube 514.
Please join shown in Figure 23, described carbamide outlet connection 145 connects with described first connecting pipe component 51, passes through with for the urea liquid being pumped out.Owing to described pump 32 is at the initial stage building pressure, the pressure of pump discharge is smaller, therefore to the pressure of pump discharge can quickly be identified, is provided with choke valve 511 in illustrative embodiments of the present invention.It is appreciated that after choke valve 511 is set and can improve outlet pressure.
It addition, please join shown in Fig. 4 to Fig. 9 and Figure 26, described carbamide ejection assemblies 100 also includes the second connecting pipe component 52 being connected with described gas inlet adapter 146.
Please join shown in Fig. 4 to Fig. 9, described heating assembly 4 includes the first heating blanket 41 being coated on described installation portion 19, the second heating blanket 42 and the 3rd heating blanket 43 being connected by wire harness 40 with described first heating blanket 41, and wherein said first heating blanket 41, described second heating blanket 42 and described 3rd heating blanket 43 are arranged in series.Described heating assembly 4 is finally connected with described wire harness assembly 6, to provide electric power.In illustrative embodiments of the present invention, described first heating blanket 41 is additionally provided with and is coated on described first through hole 192 and the shoulder 411 on described second through hole 193.Described second heating blanket 42 is wrapped in the recess 3142 of described first pump case 311 both sides, heats with the urea liquid to pump discharge, thaws.Described 3rd heating blanket 43 is wrapped in described first connecting tube 514, to realize heating, to thaw.Please join shown in Fig. 3, described heating assembly 4 also includes the pad 44 being positioned at the upper/lower terminal of described first heating blanket 41, and described first heating blanket 41 can be fixed after described lower house 11 assembles with described upper shell 12 by described pad 44.
Described wire harness assembly 6 includes the air pressure valve 61 being arranged on described pump case 31, be arranged in described lobe 315 the first pressure transducer 62 and the second pressure transducer 63 being arranged on described installation base 195.Wherein said air pressure valve 61 realizes fixing by the screw being fixed in described screwed hole 3136.Described air pressure valve 61 connects with described air inlet 3135, and one end of described second connecting pipe component 52 is connected with described gas inlet adapter 146, and the other end is connected with described air pressure valve 61.
Please join shown in Fig. 4 and Figure 18, described first pressure transducer 62 is arranged on the exit of fluid path 101, to detect mouth pressure.Described first pressure transducer 62 includes the first main part 621, the first test section 622 extending downward beyond described first main part 621, the sealing ring 623 being socketed on described first test section 622 and the first positioning convex 624 downwardly extended from described first main part 621.Please join shown in Figure 20 and Figure 21, during assembling, first described first test section 622 is inserted in described second jack 3153 together with sealing ring 623, then described first pressure transducer 62 is rotated to described groove 3151, make described first positioning convex 624 be buckled in described groove 3151.Now, described stopper section 3152 can move upward by the vertical direction described first positioning convex 624 of restriction, thus plays limit function.
Similarly, please join shown in Fig. 4 and Figure 19, described second pressure transducer 63 is arranged on the exit of gas circuit 102, to detect mouth pressure.Described second pressure transducer 63 includes the second main part 631, the second test section 632 extending downward beyond described second main part 631, the sealing ring 633 being socketed on described second test section 632, the second positioning convex 634 downwardly extended from described second main part 631 and the 3rd positioning convex 635 extended back from described second main part 631.Please join shown in Figure 20 and Figure 21, during assembling, first described second test section 632 is inserted in described first jack 1953 together with sealing ring 633, then described second pressure transducer 63 is rotated (such as turning clockwise) to described recess 1951, make described second positioning convex 634 be buckled in described recess 1951.Now, described stop wall 1952 can move upward by the vertical direction described second positioning convex 634 of restriction, thus plays limit function.Then, screw 1955 is fixed in described screw hole 1954.Being arranged such, described screw 1955 can be interfered with described 3rd positioning convex 635, to prevent described second pressure transducer 63 from rotating (rotating the most counterclockwise), departs from described stop wall 1952.
Please join shown in Figure 18 to Figure 21, in illustrative embodiments of the present invention, described first pressure transducer 62 is identical, with cost-effective with described second pressure transducer 63 structure.The circuit part of described air pressure valve 61, described first pressure transducer 62 and described second pressure transducer 63 is all connected with described wiring harness connector 148 by winding displacement.
Please join shown in Figure 22, Figure 25 to Figure 27, wherein block arrow represents the flow direction of urea liquid, and solid thin arrows represents the flow direction of air, and thin dotted arrow represents the flow direction of air when emptying.When described carbamide ejection assemblies 100 works, for the trend of fluid path 101, under the drive of described pump 32, urea liquid enters described filter assemblies 2 from carbamide inlet union 149, then enter back into the first through hole 192, and pressurized output is in passage 3141 under the effect of described pump 32, subsequently into the first connecting tube 514, through choke valve 511, finally leave from described carbamide outlet connection 145.
For the trend of gas circuit 102, compressed air enters from gas inlet adapter 146, through air pressure valve 61, enters chamber 3131 from air inlet 3135.Under normal conditions (non-clear), described check valve 3137 is closed, and the most described air flue 3133 is closed.Please join shown in Figure 22, now, compressed air can only enter the second adapter 3183, subsequently into the second through hole 193 and outlet passageway 194, finally leaves from gas outlet joint 147.
Under empty, please join shown in Figure 22, now check valve 3137 is opened, at least some of compressed air enters shown in described air flue 3133(ginseng dotted arrow), then described passage 3141 is imported, empty being positioned at the pipeline after delivery side of pump on carbamide flow direction, reduce the risk that carbamide freezes.
It should be noted that, owing to adding filling block 21 in the present invention, described receiving chamber 191 just diminishes in order to accommodating the volume of urea liquid, in this case, even if the pipeline before delivery side of pump not being emptied, it also is able to by low-temperature test, thus greatly reduces the cost of system design.
Above example be merely to illustrate the present invention and and unrestricted technical scheme described in the invention, understanding of this description should be based on person of ordinary skill in the field, such as to " front ", " afterwards ", " left ", " right ", on " ", the description of D score isotropy, although this specification with reference to the above embodiments to present invention has been detailed description, but, it will be understood by those within the art that, the present invention still can be modified or equivalent by person of ordinary skill in the field, and all are without departing from the technical scheme of the spirit and scope of the present invention and improvement thereof, all should contain in scope of the presently claimed invention.
Claims (10)
1. a carbamide ejection assemblies, in it includes housing and is installed on described housing and in order to pump the pump assembly of urea liquid, wherein said housing includes the first side wall, carbamide inlet union and be fixed on described the first side wall and extend outwardly beyond the carbamide outlet connection of described the first side wall, it is characterized in that: described pump assembly includes pump case and is positioned at the pump of described pump case, described pump is provided with the import connected with described carbamide inlet union and the outlet connected with described carbamide outlet connection, described carbamide ejection assemblies also includes the choke valve being arranged on described delivery side of pump downstream.
2. carbamide ejection assemblies as claimed in claim 1, it is characterized in that: described the first side wall is provided with the first installing hole, described carbamide outlet connection includes head, the cervical region, the latch part downwardly extended from described cervical region and the outlet downwardly extended from described latch part that downwardly extend from described head, wherein said head is wider than other parts, can be resisted against the inner side of described the first side wall；Described cervical region is held in described first installing hole；Described latch part and described outlet extend beyond described the first side wall, and the periphery of described latch part is provided with the external screw thread that matches with nut.
3. carbamide ejection assemblies as claimed in claim 2, it is characterised in that: the inner side of described latch part is provided with the accepting hole connected with described outlet, and described choke valve is contained in described accepting hole.
4. carbamide ejection assemblies as claimed in claim 2, it is characterized in that: described pump case includes the first pump case and the second pump case matched with described first pump case, described first pump case includes the first auxiliary section and the first extension extended forward from described first auxiliary section, described first extension is provided with pre-and post perforative passage, described passage connects with described delivery side of pump, and described carbamide ejection assemblies includes the first connecting pipe component connecting described passage with described carbamide outlet connection.
5. carbamide ejection assemblies as claimed in claim 4, it is characterized in that: described head is provided with the first recess, described cervical region is provided with the second recess connected with described first recess, and described first connecting pipe component includes being contained in described first recess and the first end in described second recess, the second end being contained in described passage and the first connecting tube being connected described first end and described the second end.
6. carbamide ejection assemblies as claimed in claim 5, it is characterised in that: it is equipped with sealing ring on described first end and described the second end.
7. carbamide ejection assemblies as claimed in claim 5, it is characterised in that: described first end is provided separately with described first connecting tube, and described first end is provided with the first agnail portion inserted in described first connecting tube；Described the second end is also provided separately with described first connecting tube, and described the second end is provided with the second agnail portion inserted in described first connecting tube.
8. carbamide ejection assemblies as claimed in claim 4, it is characterized in that: described first pump case includes from the described first upwardly extending lobe of extension, described lobe include the groove run through up and down, the stopper section being positioned at described groove side and with described channel connection and the second jack of extending upward through；Described carbamide ejection assemblies includes the first pressure transducer being arranged in described lobe, described first pressure transducer includes the first main part, the first test section extending downward beyond described first main part and the first positioning convex downwardly extended from described first main part, described first test section is housed in described second jack, described first positioning convex is buckled in described groove after rotating, and described stopper section in the vertical direction limits described first positioning convex and moves upward.
9. carbamide ejection assemblies as claimed in claim 1, it is characterised in that: described carbamide ejection assemblies includes heating assembly, and described heating assembly includes the 3rd heating blanket being wrapped in described first connecting tube.
10. carbamide ejection assemblies as claimed in claim 1, it is characterised in that: described carbamide ejection assemblies is air-assisted, and it includes being arranged on the gas inlet adapter on described the first side wall and gas outlet joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510151405.XA CN106150618B (en) | 2015-04-01 | 2015-04-01 | Urea injection assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510151405.XA CN106150618B (en) | 2015-04-01 | 2015-04-01 | Urea injection assembly |
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| Publication Number | Publication Date |
|---|---|
| CN106150618A true CN106150618A (en) | 2016-11-23 |
| CN106150618B CN106150618B (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510151405.XA Active CN106150618B (en) | 2015-04-01 | 2015-04-01 | Urea injection assembly |
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| FR2971006A1 (en) * | 2011-01-31 | 2012-08-03 | Coutier Moulage Gen Ind | Module for dispensing urea based additive to be injected into exhaust line for depollution of diesel engine of motor vehicle, has central dispensing part comprising cavities to receive heating elements in vicinity of mounting interfaces |
| CN102748100A (en) * | 2011-04-19 | 2012-10-24 | 苏州派格力减排系统有限公司 | Urea measuring jet pump in SCR (Selective Catalytic Reduction) system |
| CN203175652U (en) * | 2013-04-22 | 2013-09-04 | 罗伯特·博世有限公司 | Selective catalytic reduction (SCR) system and flow control module for same |
| CN103782002A (en) * | 2011-08-26 | 2014-05-07 | 罗伯特·博世有限公司 | Dosing system for a liquid reducing agent |
| CN203703420U (en) * | 2013-11-25 | 2014-07-09 | 广东美的暖通设备有限公司 | Connection component and water tank comprising same |
| CN204511604U (en) * | 2015-04-01 | 2015-07-29 | 天纳克（苏州）排放系统有限公司 | Urea-spray assembly |
-
2015
- 2015-04-01 CN CN201510151405.XA patent/CN106150618B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2971006A1 (en) * | 2011-01-31 | 2012-08-03 | Coutier Moulage Gen Ind | Module for dispensing urea based additive to be injected into exhaust line for depollution of diesel engine of motor vehicle, has central dispensing part comprising cavities to receive heating elements in vicinity of mounting interfaces |
| CN102748100A (en) * | 2011-04-19 | 2012-10-24 | 苏州派格力减排系统有限公司 | Urea measuring jet pump in SCR (Selective Catalytic Reduction) system |
| CN103782002A (en) * | 2011-08-26 | 2014-05-07 | 罗伯特·博世有限公司 | Dosing system for a liquid reducing agent |
| CN203175652U (en) * | 2013-04-22 | 2013-09-04 | 罗伯特·博世有限公司 | Selective catalytic reduction (SCR) system and flow control module for same |
| CN203703420U (en) * | 2013-11-25 | 2014-07-09 | 广东美的暖通设备有限公司 | Connection component and water tank comprising same |
| CN204511604U (en) * | 2015-04-01 | 2015-07-29 | 天纳克（苏州）排放系统有限公司 | Urea-spray assembly |
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|---|---|
| CN106150618B (en) | 2023-08-15 |
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