CN204511601U - Urea-spray assembly - Google Patents
Urea-spray assembly Download PDFInfo
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- CN204511601U CN204511601U CN201520192673.1U CN201520192673U CN204511601U CN 204511601 U CN204511601 U CN 204511601U CN 201520192673 U CN201520192673 U CN 201520192673U CN 204511601 U CN204511601 U CN 204511601U
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- urea
- pump
- assembly
- pump case
- spray assembly
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Abstract
A kind of urea-spray assembly, it comprises housing, filter assemblies and pump assembly.Described housing comprises the receiving cavity of accommodating described filter assemblies.Described filter assemblies comprises the filling block, filter core and the lid that are housed in described receiving cavity.Described pump assembly comprises the first pump case, the second pump case and pump, and described first pump case comprises the passage be communicated with described delivery side of pump and the air flue be positioned at below described passage, is provided with one-way valve in described air flue.Described second pump case comprises second taking over of taking over first of the inlet communication of described pump and be connected with outlet passageway; When described urea-spray assembly empties, one-way valve opens, pressurized air enters into described fluid path from described air flue and is only emptied by the urea liquid in the downstream being positioned at described pump at least partially, provides cost savings.In addition, the utility model, by increasing filling block, reduces in order to hold the volume of urea liquid in receiving cavity, thus alleviates because urea freezes produced destruction.
Description
Technical field
The utility model relates to a kind of urea-spray assembly, belongs to motor exhaust post-processing technology field.
Background technique
Existing urea injection system comprise air-assisted with non-air auxiliary type.Wherein, the urea injection system of non-air auxiliary type generally includes pump, filter, the metering jet be connected with pump and some sensors.This urea injection system is often very high to the requirement of metering jet, and because metering jet is arranged on outlet pipe, it easily affects measuring accuracy because of the high temperature be vented, and is even burnt out by high temperature.Pressurized air is introduced by the urea injection system of air-assisted, thus improves the effect of urea atomization, has obtained the favor of numerous manufacturer.
In addition, urea liquid can freeze under cold conditions, volumetric expansion, therefore how to empty urea liquid residual in system, the risk that reduction system is damaged by frost, and is also the problem that this system needs to solve.
Model utility content
The purpose of this utility model is to provide a kind of cost lower and has the urea-spray assembly emptying function.
For achieving the above object, the utility model adopts following technological scheme: a kind of urea-spray assembly, it comprises housing, be installed on the filter assemblies in described housing, in order to the pump assembly of pumping urea liquid, possess heating module and the wire harness assembly of heating defrosting function, described urea-spray assembly comprises the gas circuit supplying the fluid path of urea liquid circulation and voltage supply stream of compressed air to lead to, described fluid path comprises urea inlet union and urea outlet connection, described gas circuit comprises gas inlet adapter and gas outlet joint, described housing comprises assembly department, described assembly department is provided with the receiving cavity be communicated with described urea inlet union and the outlet passageway be communicated with described gas outlet joint, described filter assemblies comprises the filling block be housed in described receiving cavity, the lid being positioned at the filter core above described filling block and matching with described filter core, described pump assembly comprises pump case and is positioned at the pump of described pump case, described pump is provided with import and outlet, the second pump case that described pump case comprises the first pump case and matches with described first pump case, described first pump case comprises the passage be communicated with described delivery side of pump and the air flue be positioned at below described passage, be provided with one-way valve in described air flue, described second pump case comprises second taking over of taking over first of the inlet communication of described pump and be connected with described outlet passageway, when described urea-spray assembly normal injection, described closed check valve, pressurized air leaves from described second adapter, outlet passageway and gas outlet joint, when described urea-spray assembly empties, described one-way valve opens, pressurized air enters into described fluid path from described air flue and is only emptied by the urea liquid in the downstream being positioned at described pump at least partially.
As the technological scheme that the utility model improves further, described assembly department comprises the first through hole and is positioned at the second through hole below described first through hole, described first through hole and described second through hole are that miter angle is obliquely installed, described first adapter is inserted in described first through hole, and described second adapter is inserted in described second through hole.
As the technological scheme that the utility model improves further, described housing is provided with installation base, described installation base comprises recess, is positioned at the stop wall above described recess and is positioned at the first jack below described recess, and described first jack is communicated with described outlet passageway; Described wire harness assembly is provided with the second pressure transducer be arranged on described installation base, described second pressure transducer comprises the second main part, extend downward beyond the second detection unit of described second main part and from described second main part to the second positioning convex of downward-extension, described second detection unit is housed in described first jack, be buckled in described recess after described second positioning convex rotates, described second positioning convex of described stop wall in the vertical direction restriction moves upward.
As the technological scheme that the utility model improves further, the first extension part that described first pump case comprises the first auxiliary section and extends forward from described first auxiliary section, the described air flue that described first auxiliary section comprises the chamber being positioned at its inside, the first depressed part be connected with described chamber and is positioned at below described first depressed part, described first extension part is provided with described passage that is pre-and post perforative and that be communicated with described first depressed part; Described second pump case comprises the second auxiliary section fixed with described first auxiliary section and the second extension part extended back from described second auxiliary section, described second extension part is provided with the second depressed part of running through described second auxiliary section and takes over described second from described first adapter that described second depressed part extends back, the front end of described pump is contained in described first depressed part, and the rear end of described pump is contained in described second depressed part.
As the technological scheme that the utility model improves further, described first pump case is made up of metallic material, and described second pump case is made up of insulating material.
As the technological scheme that the utility model improves further, described pump is plunger pump, it contact pin comprising Returnning spring, be connected with piston assembly, the check valve assembly being positioned at described piston assembly front end, the coil being wrapped in described piston assembly periphery and described coil that described Returnning spring compresses mutually; Described second pump case comprises and to extend back from the upper end of described second auxiliary section and to be positioned at the contact pin portion above described second extension part, and described contact pin is through described contact pin portion.
As the technological scheme that the utility model improves further, described first pump case comprises the lug boss upwards extended from described first extension part, and described lug boss comprises the groove run through up and down, the blocked part being positioned at described groove side and with described channel connection and the second jack upwards run through; Described urea-spray assembly comprises the first pressure transducer be arranged on described lug boss, described first pressure transducer comprises the first main part, extend downward beyond the first detection unit of described first main part and from described first main part to the first positioning convex of downward-extension, described first detection unit is housed in described second jack, be buckled in described groove after described first positioning convex rotates, described first positioning convex of described blocked part in the vertical direction restriction moves upward.
As the technological scheme that the utility model improves further, described air flue comprises horizontal air flue and vertical air flue, and described one-way valve is housed in described horizontal air flue.
As the technological scheme that the utility model improves further, described urea-spray assembly comprises the rubber sheet gasket be positioned at below described first extension part, and described pump assembly comprises the retaining ring in order to be fixed to by described pump case on described housing.
As the technological scheme that the utility model improves further, described first auxiliary section also comprises the protuberance being positioned at side, described protuberance comprises the tapped hole being positioned at middle inlet hole and being positioned at the upper and lower both sides of described inlet hole, described inlet hole matches with described air flue, described urea-spray assembly also comprises the air pressure valve be arranged on described protuberance, and described air pressure valve realizes fixing by the screw be fixed in described tapped hole.
Compared to prior art, the utility model adds filling block, makes just to have diminished in order to the volume holding urea liquid in described receiving cavity, this reduces because urea freezes the destruction of produced volumetric expansion to system; In addition, based on this design, the urea liquid in the downstream being positioned at pump only empties by the utility model, does not empty, provide cost savings the urea liquid of upstream.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of the utility model urea-spray assembly.
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 plan 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 plan view of lower shell body in Fig. 3.
Figure 11 is the stereogram of rubber sheet gasket in Fig. 6.
Figure 12 is the stereogram of pump assembly in Fig. 3.
Figure 13 is the stereogram of another angle of Figure 12.
Figure 14 is the stereogram of Figure 12 angle again.
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 stereogram of the first pressure transducer in Fig. 3.
Figure 19 is the stereogram of the second pressure transducer in Fig. 3.
Figure 20 is the plan view of first, second pressure transducer at initial makeup location place in Fig. 3.
Figure 21 is the plan view of first, second pressure transducer in Fig. 3 at final installed position.
Figure 22 is the sectional view along A-A line in 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, but does not demonstrate the first connecting pipe component.
Figure 25 is the sectional view along B-B line in Fig. 4, and has marked flow direction.
Figure 26 is the sectional view along C-C line in Fig. 4, and has marked flow direction.
Figure 27 is the sectional view along D-D line in Fig. 4, and has marked flow direction.
Embodiment
Shown in please refer to the drawing 1 to Fig. 9, the utility model discloses a kind of urea-spray assembly 100, and it comprises housing 1, is positioned at the filter assemblies 2 of described housing 1, the pump assembly 3 in order to pumping urea liquid, the heating module 4 possessing heating defrosting function and wire harness assembly 6 etc.In the illustrated mode of execution of the utility model, described urea-spray assembly 100 is applied in the urea-spray assembly of air-assisted, and it comprises shown in the filled arrows that fluid path 101(joins in Fig. 4) and gas circuit 102(join shown in the hollow arrow in Fig. 4).Be appreciated that described fluid path 101 is finally pooled to the urea liquid of nozzle (not shown) place to jet atomization in outlet pipe with gas circuit 102, purified treatment is carried out to exhaust.Generally include interior mixed outer mixed two kinds of modes as described fluid path 101 and the binding mode of gas circuit 102, these are known person of ordinary skill in the field, do not repeat them here.
In the illustrated mode of execution of the utility model, described housing 1 is comprised lower shell body 11 and is carried out with described lower shell body the upper shell 12 that assembles by screw 10.Shown in please refer to the drawing 3, the top of described lower shell body 11 is provided with annular notch 111 and is held in the seal ring 112 in described annular notch 111, to improve upper shell 12 and lower shell body 11 sealability after assembling.
Shown in please refer to the drawing 5, described lower shell body 11 is roughly cuboid, they four sidewalls comprising diapire 13 and be connected with described diapire 13.Described four sidewalls comprise the first side wall 14, second sidewall 15 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 four sidewall 17 relative with described 3rd sidewall 16.Described diapire 13 surrounds a containing space 18, in order to accommodate filter assemblies 2, pump assembly 3, heating module 4 and wire harness assembly 6 etc. jointly with described four sidewalls.Described the first side wall 14 is provided with the first mounting hole 141, second mounting hole 142, the 3rd mounting hole 143 and wire harness hole 144.In the illustrated mode of execution of the utility model, described first mounting hole 141, second mounting hole 142 and the 3rd mounting hole 143 are circular ports, and described wire harness hole 144 is square openings.Wherein, described first mounting hole 141 is in order to install urea outlet connection 145, described second mounting hole 142 is in order to installing gas inlet union 146, and described 3rd mounting hole 143 is in order to installing gas outlet connection 147, and described wire harness hole 144 is in order to installation wiring joint 148.In addition, described lower shell body 11 is also provided with the urea inlet union 149 with the molding and forming of described the first side wall 14.
In the illustrated mode of execution of the utility model, described urea outlet connection 145, gas inlet adapter 146, gas outlet joint 147, wiring harness connector 148 and urea inlet union 149 are all positioned at the same side of described housing 1, so that assembling.In addition, described urea inlet union 149 is near described 3rd sidewall 16, and described urea outlet connection 145 is near described 4th sidewall 17.Described gas inlet adapter 146 and described gas outlet joint 147 are between described urea outlet connection 145 and described urea inlet union 149, wherein said gas inlet adapter 146 is near described urea outlet connection 145, described gas outlet joint 147 near described urea inlet union 149, to make the trend of described fluid path 101 contrary with the trend of described gas circuit 102 substantially.Described wiring harness connector 148 is between described urea outlet connection 145 and described gas inlet adapter 146.
Shown in please refer to the drawing 6, Figure 10 and Figure 24, described urea outlet connection 145 comprises head 1451, from described head 1451 to the neck 1452 of downward-extension, from described neck 1452 to the latch part 1453 of downward-extension and from described latch part 1453 to the outer pipe 1454 of downward-extension.Described head 1451 is wider than other parts, so that when other parts are by described first mounting 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 neck 1452 is held in described first mounting hole 141, and described neck 1452 is provided with the second recess 1456 be communicated with described first recess 1455.The periphery of described latch part 1453 is provided with the outside thread 1457 that to match with nut 1459, and the inner side of described latch part 1453 is provided with the accepting hole 1458 be communicated with described outer pipe 1454.
Shown in please refer to the drawing 6, described diapire 13 is provided with spaced a pair projection 131 and is formed in this to the receiving groove 132 between projection 131, and wherein each projection 131 is equipped with the concave surface 133 tilted to described receiving groove 132 and the fixed hole 134 be positioned at outside described concave surface 133.In the illustrated mode of execution of the utility model, the bottom of described receiving groove 132 is just concordant with the upper surface of described diapire 13.Described receiving groove 132 is roughly obliquely installed along miter angle.
Described lower shell body 11 also comprises the assembly department 19 near described 3rd sidewall 16, and described assembly department 19 connects described the first side wall 14 and described second sidewall 15.Described assembly department 19 is provided with the receiving cavity 191 be communicated with described urea inlet union 149, and described receiving cavity 191 runs through described second sidewall 15.Described assembly department 19 is also provided with near described second sidewall 15 and towards the first through hole 192 of described receiving groove 132 and the second through hole 193 of being positioned at below described first through hole 192, wherein said first through hole 192 is arranged side by side with described second through hole 193 in the vertical direction.In the illustrated mode of execution of the utility model, described first through hole 192 is same with described second through hole 193 to be obliquely installed along miter angle.In addition, described assembly department 19 also comprises the outlet passageway 194 be communicated with described second through hole 193, and described outlet passageway 194 is communicated with described gas outlet joint 147.Described assembly department 19 is provided with the installation base 195 near described the first side wall 14.Described installation base 195 comprises the recess 1951 opened to described 4th sidewall 17 and the stop wall 1952 be positioned at above described recess 1951, and described recess 1951 upwards runs through.Described assembly department 19 is also provided with and is communicated with described outlet passageway 194 and the first jack 1953 upwards run through and be positioned at the bottom-right screw hole 1954 of described first jack 1953.
Shown in please refer to the drawing 7 and Figure 25, the lid 23 that described filter assemblies 2 comprises the filling block 21 be housed in successively in described receiving cavity 191, is positioned at the filter core 22 above described filling block 21 and matches with described filter core 22.In the illustrated mode of execution of the utility model, described lid 23 adopts screw-thread fit with described assembly department 19, with for convenience detach, is convenient to more renew cartridge 22, saves maintenance cost.Shown in please refer to the drawing 20, filter assemblies 2 of the present utility model goes out formula outward in entering, namely in use, urea liquid upwards circulates from the gap between described filling block 21 and described receiving cavity 191, then urea liquid again ecto-entad penetrate described filter core 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.May burst the risk of described assembly department 19 after freezing to reduce urea liquid, the utility model have employed anti-freeze design, namely adds described filling block 21.In addition, because add described filling block 21, correspondingly, just diminished in order to the volume holding urea liquid in described receiving cavity 191, this reduces the requirement of the pumping capacity to pump assembly 3, simplify design.In the illustrated mode of execution of the utility model, described filling block 21 is non deformable duroplasts, to save cost.It will be appreciated, of course, that in other embodiments, described filling block 21 also can adopt has certain flexible soft material.
Shown in please refer to the drawing 4, described pump assembly 3 is inclined in described housing 1, roughly parallel with a diagonal of described housing 1.Shown in please refer to the drawing 12 to Figure 17, described pump assembly 3 comprises pump case 31, be positioned at the pump 32 of described pump case 31 and in order to described pump case 31 to be fixed to the retaining ring 33 on described diapire 13.Described pump case 31 can play a good protection to the pump 32 in it.
The second pump case 312 that described pump case 31 comprises the first pump case 311 and matches with described first pump case 311.In the illustrated mode of execution of the utility model, described first pump case 311 is made up of metallic material, on the one hand can the high pressure in bearing pump outlet port; Be convenient to heat radiation on the other hand, to reduce the impact of heat on the precision of pump 32; Described second pump case 312 is made up of insulating material (such as plastics) substantially, and the contact pin 321 being convenient to pump 32 passes, and avoids short circuit, is detailed later.It should be noted that, although described second pump case 312 is made up of insulating material substantially, in order to improve assembling intensity, the female metal nuts of tool can be embedded in the position of screw hole.
Described first pump case 311 comprises the first auxiliary section 313, the first extension part 314 of extending of one and the lug boss 315 that upwards extends from described first extension part 314 forward from described first auxiliary section 313.The air flue 3133 that described first auxiliary section 313 comprises the chamber 3131 being positioned at its inside, the first depressed part 3132 be connected with described chamber 3131 and is positioned at below described first depressed part 3132.Shown in please refer to the drawing 14, described first auxiliary section 313 also comprises the protuberance 3134 being positioned at side, and described protuberance 3134 comprises the tapped hole 3136 being positioned at middle inlet hole 3135 and being positioned at the described upper and lower both sides of inlet hole 3135.In the illustrated mode of execution of the utility model, described inlet hole 3135 is communicated with described chamber 3131, and described chamber 3131 is communicated with described air flue 3133 again, finally makes described inlet hole 3135 be communicated with described air flue 3133.Shown in please refer to the drawing 15 and Figure 16, described first pump case 311 also comprises the one-way valve 3137 be contained in described air flue 3133.Shown in please refer to the drawing 17, in the illustrated mode of execution of the utility model, described air flue 3133 comprises horizontal air flue 3138 and vertical air flue 3139, and wherein said one-way valve 3137 is housed in described horizontal air flue 3138.
Described first extension part 314 is provided with passage 3141 that is pre-and post perforative and that be communicated with described first depressed part 3132.Described air flue 3133 forward and upwards extend, to be communicated with passage 3141.In addition, described first extension part 314 is also provided with the recess 3142 being positioned at described air flue 3133 both sides.Described lug boss 315 comprises the groove 3151 opened to described 4th sidewall 17 and the blocked part 3152 being positioned at described groove 3151 side, and described groove about 3151 runs through.Described lug boss 315 is also provided with and is communicated with and the second jack 3153 upwards run through with described passage 3141.
Described second pump case 312 comprises the second auxiliary section 316, the contact pin portion 317 extended back from the upper end of described second auxiliary section 316 and extends back from described second auxiliary section 316 and be positioned at the second extension part 318 below described contact pin portion 317.Described second auxiliary section 316 realizes being connected by the bolt 319 being positioned at four corners with described first auxiliary section 313.In order to enhanced leaktightness, described second auxiliary section 316 is provided with the mounting groove 3161 being looped around its end face and the seal ring 3162 be held in described mounting groove 3161.Described second extension part 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.
Shown in please refer to the drawing 16 and Figure 17, in the illustrated mode of execution of the utility model, described pump 32 is plunger pump, it comprises Returnning spring 322, the piston assembly 323 compressed mutually with described Returnning spring 322, the check valve assembly 324 being positioned at described piston assembly 323 front end and be wrapped in the coil 325 of described piston assembly 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.
Shown in please refer to the drawing 9, described retaining ring 33 comprise the first press part 331, with spaced second press part 332, described first press part 331 and a pair department of assembly 333 being connected described first press part 331 and described second press part 332, wherein said first press part 331 and described second press part 332 all have the internal surface of arc-shaped to match with described first extension part 314.Described first press part 331 has hollow part 334 with the centre of described second press part 332, and described lug boss 315 extends up through described hollow part 334.Described department of assembly 333 is roughly in planar, and it comprises the mounting hole 335 corresponding with described fixed hole 134.
Shown in please refer to the drawing 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 is communicated with described first adapter 3182, and the outlet 327 of described pump 32 is communicated with described passage 3141.
Further, when being installed on described lower shell body 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 to pass the fixed hole 134 of described mounting hole 335 and correspondence, by described retaining ring 33, described pump case 31 is fixed.
It should be noted that, in the illustrated mode of execution of the utility model, when being installed on described lower shell body 11 by described pump case 31, can realize location by described first adapter 3182 and described second adapter 3183.In order to avoid crossing location, in the illustrated mode of execution of the utility model, described housing 1 also comprises and to be positioned at above described receiving groove 132 and the rubber sheet gasket 135 be supported on described concave surface 133.Described rubber sheet gasket 135 has the upper surface 1351 of arc-shaped and is positioned at the first positioning part 1352 and the second positioning part 1353 of described upper surface 1351 both sides.The upper surface 1351 of described arc-shaped is in order to support the first extension part 314 of described pump case 31.Described first positioning part 1352 and described second positioning part 1353 all to downward-extension, and respectively in order to be held in the rear and front end of each projection 131.Described rubber sheet gasket 135 possesses certain elasticity, can absorbing vibration, avoids location etc.
Shown in please refer to the drawing 4 to Fig. 9, Figure 23, Figure 24, described urea-spray assembly 100 also comprises the first connecting pipe component 51 connecting described passage 3141 and described urea outlet connection 145.Described first connecting pipe component 51 comprises the throttle valve 511 be contained in described accepting hole 1458, the first end 512 be contained in described first recess 1455 and the second recess 1456, be contained in the second end 513 in described passage 3141 and connect the first connecting tube 514 of described first end 512 and the second end 513.In order to enhanced leaktightness, described first end 512 and the second end 513 are equipped with seal ring 515.In the illustrated mode of execution of the utility model, described first end 512 is two elements be provided separately with described first connecting tube 514, and described first end 512 is provided with the first hangnail portion 5121 inserted in described first connecting tube 514; Similarly, described the second end 513 is also two elements be provided separately with described first connecting tube 514, and described the second end 513 is provided with the second hangnail portion 5131 inserted in described first connecting tube 514.
Shown in please refer to the drawing 23, described urea outlet connection 145 is communicated with described first connecting pipe component 51, passes through with for pumping out the urea liquid come.Because described pump 32 is at the initial stage of building pressure, the pressure of pump discharge is smaller, therefore in order to identify the pressure of pump discharge fast, in the illustrated mode of execution of the utility model, is provided with throttle valve 511.Be appreciated that and can improve outlet pressure after throttle valve 511 is set.
In addition, shown in please refer to the drawing 4 to Fig. 9 and Figure 26, described urea-spray assembly 100 also comprises the second connecting pipe component 52 be connected with described gas inlet adapter 146.
Shown in please refer to the drawing 4 to Fig. 9, the second heating blanket 42 that described heating module 4 comprises the first heating blanket 41 be coated on described assembly department 19, be connected with described first heating blanket 41 by wire harness 40 and the 3rd heating blanket 43, wherein said first heating blanket 41, described second heating blanket 42 and described 3rd heating blanket 43 are arranged in series.Described heating module 4 is finally connected with described wire harness assembly 6, to provide electric power.In the illustrated mode of execution of the utility model, described first heating blanket 41 is also 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, to heat the urea liquid of pump discharge, to thaw.Described 3rd heating blanket 43 is wrapped on described first connecting tube 514, to realize heating, to thaw.Shown in please refer to the drawing 3, described heating module 4 also comprises the pad 44 of the upper/lower terminal being positioned at described first heating blanket 41, and described pad 44 can be fixed described first heating blanket 41 after described lower shell body 11 is assembled with described upper shell 12.
The second pressure transducer 63 that described wire harness assembly 6 comprises the air pressure valve 61 be arranged on described pump case 31, is arranged on the first pressure transducer 62 on described lug boss 315 and is arranged on described installation base 195.Wherein said air pressure valve 61 realizes fixing by the screw be fixed in described tapped hole 3136.Described air pressure valve 61 is communicated with described inlet hole 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.
Shown in please refer to the drawing 4 and Figure 18, described first pressure transducer 62 is arranged on the outlet port of fluid path 101, to detect mouth pressure.Described first pressure transducer 62 comprises the first main part 621, extend downward beyond the first detection unit 622 of described first main part 621, be socketed in seal ring 623 on described first detection unit 622 and from described first main part 621 to the first positioning convex 624 of downward-extension.Shown in please refer to the drawing 20 and Figure 21, during assembling, first described first detection unit 622 is inserted in described second jack 3153 together with seal ring 623, then described first pressure transducer 62 is rotated to described groove 3151, described first positioning convex 624 is buckled in described groove 3151.Now, described blocked part 3152 can move upward by described first positioning convex 624 of in the vertical direction restriction, thus plays limit function.
Similarly, shown in please refer to the drawing 4 and Figure 19, described second pressure transducer 63 is arranged on the outlet port of gas circuit 102, to detect mouth pressure.Described second pressure transducer 63 comprises the second main part 631, extends downward beyond the second detection unit 632 of described second main part 631, the seal ring 633 be socketed on described second detection unit 632, from described second main part 631 to the second positioning convex 634 of downward-extension and the 3rd positioning convex 635 that extends back from described second main part 631.Shown in please refer to the drawing 20 and Figure 21, during assembling, first described second detection unit 632 is inserted in described first jack 1953 together with seal ring 633, then described second pressure transducer 63 is rotated (such as turning clockwise) to described recess 1951, described second positioning convex 634 is buckled in described recess 1951.Now, described stop wall 1952 can move upward by described second positioning convex 634 of in the vertical direction restriction, thus plays limit function.Then, screw 1955 is fixed in described screw hole 1954.Setting like this, described screw 1955 can be interfered with described 3rd positioning convex 635, to prevent described second pressure transducer 63 from rotating (being such as rotated counterclockwise), departs from described stop wall 1952.
Shown in please refer to the drawing 18 to Figure 21, in the illustrated mode of execution of the utility model, described first pressure transducer 62 is identical with described second pressure transducer 63 structure, to save cost.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.
Shown in please refer to the drawing 22, Figure 25 to Figure 27, wherein thick arrow represents the flow direction of urea liquid, and solid thin arrows represents the flow direction of air, the flow direction of air when thin dotted arrow representative empties.When described urea-spray assembly 100 works, with regard to the trend of fluid path 101, under the drive of described pump 32, urea liquid enters described filter assemblies 2 from urea inlet union 149, and then enter the first through hole 192, and pressurizedly under the effect of described pump 32 to output in passage 3141, then enter the first connecting tube 514, through throttle valve 511, finally leave from described urea outlet connection 145.
With regard to the trend of gas circuit 102, pressurized air enters from gas inlet adapter 146, through air pressure valve 61, enters chamber 3131 from inlet hole 3135.Under normal conditions (non-clear), described one-way valve 3137 is closed, and namely described air flue 3133 is closed.Shown in please refer to the drawing 22, now, pressurized air can only enter the second adapter 3183, then enters the second through hole 193 and outlet passageway 194, finally leaves from gas outlet joint 147.
Under empty, shown in please refer to the drawing 22, now one-way valve 3137 is opened, pressurized air enters shown in described air flue 3133(ginseng dotted arrow at least partially), then described passage 3141 is imported, the pipeline be positioned at after delivery side of pump on urea flow direction is emptied, reduces the risk that urea freezes.
It should be noted that, owing to adding filling block 21 in the utility model, just diminish in order to the volume holding urea liquid in described receiving cavity 191, in this case, even if do not empty the pipeline before delivery side of pump, also can pass through low-temperature test, thus greatly reduce the cost of system.
The technological scheme of above embodiment only for illustration of the utility model and described by unrestricted the utility model, understanding of this description should based on person of ordinary skill in the field, such as to " front ", " afterwards ", " left side ", " right side ", " on ", the description of D score isotropy, although this specification has been described in detail the utility model with reference to the above embodiments, but, those of ordinary skill in the art is to be understood that, person of ordinary skill in the field still can modify to the utility model or equivalent replacement, and all do not depart from technological scheme and the improvement thereof of spirit and scope of the present utility model, all should be encompassed in right of the present utility model.
Claims (10)
1. a urea-spray assembly, it comprises housing, be installed on the filter assemblies in described housing, in order to the pump assembly of pumping urea liquid, possess heating module and the wire harness assembly of heating defrosting function, described urea-spray assembly comprises the gas circuit supplying the fluid path of urea liquid circulation and voltage supply stream of compressed air to lead to, described fluid path comprises urea inlet union and urea outlet connection, described gas circuit comprises gas inlet adapter and gas outlet joint, described housing comprises assembly department, described assembly department is provided with the receiving cavity be communicated with described urea inlet union and the outlet passageway be communicated with described gas outlet joint, it is characterized in that: described filter assemblies comprises the filling block be housed in described receiving cavity, the lid being positioned at the filter core above described filling block and matching with described filter core, described pump assembly comprises pump case and is positioned at the pump of described pump case, described pump is provided with import and outlet, the second pump case that described pump case comprises the first pump case and matches with described first pump case, described first pump case comprises the passage be communicated with described delivery side of pump and the air flue be positioned at below described passage, be provided with one-way valve in described air flue, described second pump case comprises second taking over of taking over first of the inlet communication of described pump and be connected with described outlet passageway, when described urea-spray assembly normal injection, described closed check valve, pressurized air leaves from described second adapter, outlet passageway and gas outlet joint, when described urea-spray assembly empties, described one-way valve opens, pressurized air enters into described fluid path from described air flue and is only emptied by the urea liquid in the downstream being positioned at described pump at least partially.
2. urea-spray assembly as claimed in claim 1, it is characterized in that: described assembly department comprises the first through hole and is positioned at the second through hole below described first through hole, described first through hole and described second through hole are that miter angle is obliquely installed, described first adapter is inserted in described first through hole, and described second adapter is inserted in described second through hole.
3. urea-spray assembly as claimed in claim 1, it is characterized in that: described housing is provided with installation base, described installation base comprises recess, is positioned at the stop wall above described recess and is positioned at the first jack below described recess, and described first jack is communicated with described outlet passageway; Described wire harness assembly is provided with the second pressure transducer be arranged on described installation base, described second pressure transducer comprises the second main part, extend downward beyond the second detection unit of described second main part and from described second main part to the second positioning convex of downward-extension, described second detection unit is housed in described first jack, be buckled in described recess after described second positioning convex rotates, described second positioning convex of described stop wall in the vertical direction restriction moves upward.
4. urea-spray assembly as claimed in claim 1, it is characterized in that: the first extension part that described first pump case comprises the first auxiliary section and extends forward from described first auxiliary section, the described air flue that described first auxiliary section comprises the chamber being positioned at its inside, the first depressed part be connected with described chamber and is positioned at below described first depressed part, described first extension part is provided with described passage that is pre-and post perforative and that be communicated with described first depressed part; Described second pump case comprises the second auxiliary section fixed with described first auxiliary section and the second extension part extended back from described second auxiliary section, described second extension part is provided with the second depressed part of running through described second auxiliary section and takes over described second from described first adapter that described second depressed part extends back, the front end of described pump is contained in described first depressed part, and the rear end of described pump is contained in described second depressed part.
5. urea-spray assembly as claimed in claim 4, it is characterized in that: described first pump case is made up of metallic material, described second pump case is made up of insulating material.
6. urea-spray assembly as claimed in claim 5, it is characterized in that: described pump is plunger pump, it contact pin comprising Returnning spring, be connected with piston assembly, the check valve assembly being positioned at described piston assembly front end, the coil being wrapped in described piston assembly periphery and described coil that described Returnning spring compresses mutually; Described second pump case comprises and to extend back from the upper end of described second auxiliary section and to be positioned at the contact pin portion above described second extension part, and described contact pin is through described contact pin portion.
7. urea-spray assembly as claimed in claim 4, it is characterized in that: described first pump case comprises the lug boss upwards extended from described first extension part, described lug boss comprises the groove run through up and down, the blocked part being positioned at described groove side and with described channel connection and the second jack upwards run through; Described urea-spray assembly comprises the first pressure transducer be arranged on described lug boss, described first pressure transducer comprises the first main part, extend downward beyond the first detection unit of described first main part and from described first main part to the first positioning convex of downward-extension, described first detection unit is housed in described second jack, be buckled in described groove after described first positioning convex rotates, described first positioning convex of described blocked part in the vertical direction restriction moves upward.
8. urea-spray assembly as claimed in claim 7, is characterized in that: described air flue comprises horizontal air flue and vertical air flue, and described one-way valve is housed in described horizontal air flue.
9. urea-spray assembly as claimed in claim 4, it is characterized in that: described urea-spray assembly comprises the rubber sheet gasket be positioned at below described first extension part, described pump assembly comprises the retaining ring in order to be fixed to by described pump case on described housing.
10. urea-spray assembly as claimed in claim 4, it is characterized in that: described first auxiliary section also comprises the protuberance being positioned at side, described protuberance comprises the tapped hole being positioned at middle inlet hole and being positioned at the upper and lower both sides of described inlet hole, described inlet hole matches with described air flue, described urea-spray assembly also comprises the air pressure valve be arranged on described protuberance, and described air pressure valve realizes fixing by the screw be fixed in described tapped hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520192673.1U CN204511601U (en) | 2015-04-01 | 2015-04-01 | Urea-spray assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520192673.1U CN204511601U (en) | 2015-04-01 | 2015-04-01 | Urea-spray assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204511601U true CN204511601U (en) | 2015-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520192673.1U Withdrawn - After Issue CN204511601U (en) | 2015-04-01 | 2015-04-01 | Urea-spray assembly |
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| CN (1) | CN204511601U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150619A (en) * | 2015-04-01 | 2016-11-23 | 天纳克（苏州）排放系统有限公司 | Carbamide ejection assemblies |
| CN106194712A (en) * | 2016-09-22 | 2016-12-07 | 凯龙高科技股份有限公司 | A kind of relief valve for dosing pump |
| CN107461240A (en) * | 2016-06-06 | 2017-12-12 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| CN107461244A (en) * | 2016-06-06 | 2017-12-12 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| CN108194172A (en) * | 2017-12-29 | 2018-06-22 | 凯龙高科技股份有限公司 | A kind of urea pump pressure accumulation chamber safety valve |
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2015
- 2015-04-01 CN CN201520192673.1U patent/CN204511601U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150619A (en) * | 2015-04-01 | 2016-11-23 | 天纳克（苏州）排放系统有限公司 | Carbamide ejection assemblies |
| CN106150619B (en) * | 2015-04-01 | 2023-09-15 | 天纳克（苏州）排放系统有限公司 | Urea injection assembly |
| CN107461240A (en) * | 2016-06-06 | 2017-12-12 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| CN107461244A (en) * | 2016-06-06 | 2017-12-12 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| CN107461244B (en) * | 2016-06-06 | 2023-06-09 | 天纳克（苏州）排放系统有限公司 | Integrated device, exhaust gas aftertreatment system and control method |
| CN106194712A (en) * | 2016-09-22 | 2016-12-07 | 凯龙高科技股份有限公司 | A kind of relief valve for dosing pump |
| CN106194712B (en) * | 2016-09-22 | 2019-09-17 | 凯龙高科技股份有限公司 | A kind of safety valve for metering pump |
| CN108194172A (en) * | 2017-12-29 | 2018-06-22 | 凯龙高科技股份有限公司 | A kind of urea pump pressure accumulation chamber safety valve |
| CN108194172B (en) * | 2017-12-29 | 2020-12-22 | 凯龙高科技股份有限公司 | Safety valve for pressure storage cavity of urea pump |
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