CN204646378U - Urea pump and comprise its urea system - Google Patents
Urea pump and comprise its urea system Download PDFInfo
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- CN204646378U CN204646378U CN201520266874.1U CN201520266874U CN204646378U CN 204646378 U CN204646378 U CN 204646378U CN 201520266874 U CN201520266874 U CN 201520266874U CN 204646378 U CN204646378 U CN 204646378U
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Abstract
The utility model discloses a kind of urea pump and comprises its urea system, wherein, urea pump comprises: urea branch road and gas branch road, wherein, urea branch road comprises: the feed liquor portion of solution inlet of supplying urea, the fluid portion of taphole of supplying urea, solution of supplying urea are by the urea liquid pump of the power in described feed liquor portion to described fluid portion, for making the first switch gear that between described feed liquor portion with described fluid portion, selectivity is communicated with; Gas branch road comprises: provide the air input part of gas access, provide the portion of giving vent to anger of gas outlet, second switch device for making described air input part be communicated with described selectivity between portion of giving vent to anger; Wherein, described first switch gear is connected with described second switch device, is communicated with described gas branch road selectivity to make described urea branch road.Urea pump of the present utility model not only can realize the function of conventional urea pump, can also realize the function of urea blowback.
Description
Technical field
The utility model relates to exhaust gas from diesel vehicle treatment and purification field, particularly relates to a kind of urea pump and comprises its urea system.
Background technique
Automobile urea system is mainly used in reducing the nitrogen oxides pollution in exhaust gas from diesel vehicle, generates free of contamination nitrogen and water vapour discharge.Urea system mainly comprises: store the urea box of urea liquid, the urea pump pumped into by the urea liquid in urea box in outlet pipe, be used for the urea liquid level sensor of the liquid level detected in urea box, and prevent the cooling water system of urea crystals.Chinese patent literature CN 103352745 A open a kind of " air-assisted urea pump system ", as shown in Figure 1, comprise: urea pump electronic control unit, urea pump main body, mixing chamber, urea tank and vehicle-mounted source of compressed air, urea pump main body respectively with mixing chamber, urea tank is connected by pipeline, vehicle-mounted source of compressed air is connected with described mixing chamber by air solenoid valve, urea pump electronic control unit controls the running of urea pump main body and the keying of air solenoid valve respectively, in system, also bypass conduit is set, the two ends of bypass line are connected with urea tank with mixing chamber respectively, bypass line is arranged a bypass valve, bypass valve is controlled by urea pump electronic control unit.The program by arranging bypass line in urea pump assembly, control the unlatching of bypass valve on bypass line, realize emptying residual urea liquid in urea pipe and nozzle by pressure difference, thus avoid because urea crystallization and blocking pipeline of existing in pipeline affect the technical problem of nozzle ejection.But the structure relative complex of the program, is not easy to manufacture assembling.
To sum up, there is complex structure in the urea system of prior art, cost of material and the high defect of manufacture cost.Therefore, need badly and the urea system of prior art is made improvements, to meet its actual demand.
Model utility content
An object of the present utility model is to provide a kind of urea pump, and it not only can realize the function of conventional urea pump, can also realize the function of urea blowback.
Another object of the present utility model is to provide a kind of urea pump, and it carries cooling water on-off control device, optimizes pipeline structure, has saved cost of material and administration cost, for production assembling is provided convenience.
Another object of the present utility model is to provide a kind of urea system, and it has, and structure is simple, cost of material and low cost of manufacture, be convenient to assemble and the advantage of convenient operation.
For reaching this object, the utility model by the following technical solutions:
On the one hand, a kind of urea pump is provided, comprises: urea branch road and gas branch road,
Wherein, urea branch road comprises:
Feed liquor portion, solution inlet of supplying urea;
Fluid portion, taphole of supplying urea;
Urea liquid pump, the power of solution by described feed liquor portion to described fluid portion of supplying urea;
First switch gear, is arranged between described feed liquor portion and described fluid portion, is communicated with for making selectivity between described feed liquor portion with described fluid portion;
Gas branch road comprises:
Air input part, provides gas access;
To give vent to anger portion, gas outlet is provided;
Second switch device, being arranged at described air input part and describedly giving vent to anger between portion, being communicated with for making described air input part with described selectivity between portion of giving vent to anger;
Wherein, described first switch gear is connected with described second switch device, is communicated with described gas branch road selectivity to make described urea branch road.
Urea pump of the present utility model is by arranging the first switch gear and second switch device, and the first switch gear is connected with second switch device, thus make urea branch road be communicated with gas branch road selectivity or block, not only can realize the function of conventional urea pump, when urea branch road is communicated with gas branch road, gas can also be utilized by the urea liquid blowback of backflow to urea box, realize blowback (or claiming blowback) function of urea, effectively prevent the problem that urea liquid deposits in pipeline.
As a kind of preferred version of described urea pump, also comprise: cooling water branch road,
Described cooling water branch road comprises:
Inlet part, provides cooling water inlet;
Outlet part, provides coolant outlet;
3rd switch gear, is arranged between described inlet part and described outlet part, is communicated with for making selectivity between described inlet part with described outlet part.
Urea pump of the present utility model is by design the 3rd switch gear, and the break-make that can realize cooling water controls, relative to conventional construction, by the break-make control integration of cooling water on urea pump, more be conducive to reducing installing space, be convenient to assembling and operation, depot is also without the need to carrying out secondary assembling.
As a kind of preferred version of described urea pump, described fluid portion is communicated with by mixing unit with described giving vent to anger between portion.By arranging mixing unit, air and urea liquid can be made to carry out premix, optimizing the effect of catalytic reaction.Be more preferably, described mixing unit can adopt three-way valve.
As a kind of preferred version of described urea pump, also comprise: housing, limit the installing space of described urea branch road, described gas branch road and described cooling water branch road.
As a kind of preferred version of described urea pump, described first switch gear comprises: three-way valve, described three-way valve has three valve ports, be respectively the first valve port, the second valve port and the 3rd valve port, these three valve ports can mutual conduction, forms the passage passed through for urea liquid, described first valve port is connected with described second switch device, described second valve port is connected with described feed liquor portion, and described 3rd valve port is connected with described urea liquid pump, and described urea liquid pump is connected with described fluid portion.
As a kind of preferred version of described urea pump, described first valve port to described second valve port is one-way conduction.By designing the first valve port to the second valve port one-way conduction, gas can be made can to flow to the second valve port from the first valve port, by urea liquid blowback to urea box, and urea liquid can not flow to the first valve port from the second valve port, thus avoids urea liquid and flow in gas branch road.
As a kind of preferred version of described urea pump, described second switch device comprises solenoid valve assembly, described solenoid valve assembly comprises the valve pocket, the first solenoid valve that provide gas channel, described valve pocket has the first valve pocket mouth, the second valve pocket mouth and the 3rd valve pocket mouth, described first valve pocket mouth is connected with described air input part, described second valve pocket mouth is connected with described first switch gear, described 3rd valve pocket mouth is connected with the described portion of giving vent to anger, and described first solenoid valve makes described first valve pocket mouth be communicated with described 3rd valve pocket mouth selectivity.Preferably, described second valve pocket mouth is connected with the first valve port of described three-way valve, achieves the first switch gear and is connected with second switch device.
As a kind of preferred version of described urea pump, described solenoid valve assembly also comprises the second solenoid valve, and described second solenoid valve makes described first valve pocket mouth be communicated with described second valve pocket mouth selectivity.By above-mentioned design, when normally for urea liquid, second solenoid valve makes the first valve pocket mouth and the second valve pocket mouth block, first solenoid valve makes the first valve pocket mouth be communicated with the 3rd valve pocket mouth, gas flows into the first valve pocket mouth by air input part, flowed out by the portion of giving vent to anger through the 3rd valve pocket mouth, the urea liquid flowed out with urea branch road mixes; When stopping for urea liquid, second solenoid valve makes the first valve pocket mouth be communicated with the second valve pocket mouth, first solenoid valve makes the first valve pocket mouth be communicated with the 3rd valve pocket mouth, gas flows into the first valve pocket mouth by air input part, then the second valve pocket mouth and the 3rd valve pocket mouth is flowed to respectively, the gas flowing into the second valve pocket mouth enters urea branch road through the first valve port, by urea liquid blowback to urea box; The gas flowing into the 3rd valve pocket mouth flows in mixed pipe line through the portion of giving vent to anger, and is got rid of by the urea liquid in mixed pipe line, effectively prevent the deposition of urea liquid.
As a kind of preferred version of described urea pump, described urea liquid pump connects urea pressure transducer, for detecting the pressure of urea liquid; And/or,
Described valve pocket connects air pressure probe, for detecting gas pressure.
On the other hand, provide a kind of urea system, comprise described urea pump, urea liquid level sensor and urea box, described urea pump is connected with described urea liquid level sensor, and entirety is loaded on described urea box.
As a kind of preferred version of described urea system, described urea liquid level sensor comprises fixed base, one end of described fixed base is fixedly connected with described urea pump, and the other end of described fixed base stretches into in described urea box, and and adopts radial seal between described urea box.Adopt radial seal between urea liquid level sensor of the present utility model and urea box, relative to the traditional method adopting axial end sealing, traditional method needs the extruding of seal ring elasticity, and seal ring is extruded for a long time and causes the life-span short on the one hand; The pressure requirements of sealing place is high on the other hand, and the material of sealing place requires high, generally need to adopt stainless steel, therefore cost of material is high; The utility model adopts radial seal, and hydrostatic seal both can ensure sealing effect, simultaneously low to material requirements, reduced cost of material, extended working life.
Compared with prior art, the beneficial effects of the utility model: urea pump of the present utility model is by arranging the first switch gear and second switch device, and the first switch gear is connected with second switch device, thus make urea branch road be communicated with gas branch road selectivity or block, not only can realize the function of conventional urea pump, when urea branch road is communicated with gas branch road, gas can also be utilized by the urea liquid blowback of backflow to urea box, realize blowback (or claiming blowback) function of urea, effectively prevent the problem that urea liquid deposits in pipeline.
Accompanying drawing explanation
According to drawings and embodiments the utility model is described in further detail below.
Fig. 1 is the structural representation of a kind of urea system of prior art;
Fig. 2 is the structure principle chart of the urea pump described in embodiment of the present utility model;
Fig. 3 is the schematic flow sheet of the first working state of the urea pump described in embodiment of the present utility model;
Fig. 4 is the schematic flow sheet of the second working state of the urea pump described in embodiment of the present utility model;
Fig. 5 is the structure principle chart of the solenoid valve assembly of the urea pump described in embodiment of the present utility model;
Fig. 6 is the structure principle chart of the three-way valve of the urea pump described in embodiment of the present utility model;
Fig. 7 is the partial structurtes schematic diagram of the three-way valve of the urea pump described in embodiment of the present utility model;
The first working state schematic representation that Fig. 8 is the three-way valve described in Fig. 7;
Fig. 9 is the structure principle chart of the cooling water branch road of the urea pump described in embodiment of the present utility model;
Figure 10 is the urea liquid level sensor described in embodiment of the present utility model and urea box sealed structural representation.
In figure:
1, valve body; 11, the first valve port; 12, the second valve port; 13, valve passage; 131, valve passage wall; 14, flap; 15, flap reposition element; 16, sealing gasket;
2, fixed base;
3, urea box;
4, seal ring.
Embodiment
The technical solution of the utility model is further illustrated by embodiment below in conjunction with accompanying drawing.
Embodiment of the present utility model provides a kind of urea pump, comprise: urea branch road and gas branch road, wherein, urea branch road comprises: the feed liquor portion of solution inlet of supplying urea, the fluid portion of taphole of supplying urea, the urea liquid pump of solution by the power in described feed liquor portion to described fluid portion of supplying urea, and the first switch gear be arranged between described feed liquor portion and described fluid portion, be communicated with for making selectivity between described feed liquor portion with described fluid portion; Gas branch road comprises: provide the air input part of gas access, provide the portion of giving vent to anger of gas outlet, and is arranged at described air input part and described second switch device of giving vent to anger between portion, is communicated with described selectivity between portion of giving vent to anger for making described air input part;
Wherein, described first switch gear is connected with described second switch device, is communicated with described gas branch road selectivity to make described urea branch road.
Fig. 2 is the structure principle chart of the urea pump provided according to the utility model one embodiment.In the present embodiment, feed liquor portion at least comprises liquid inlet pipe, and fluid portion at least comprises drain pipe, and air input part at least comprises suction tude, and the portion of giving vent to anger at least comprises steam outlet pipe, and the first switch gear at least comprises three-way valve, and second switch device at least comprises solenoid valve assembly.Certainly, the first switch gear, second switch device are not limited to the form of above-described embodiment, and in other embodiments of the present utility model, the first switch gear, second switch device can also adopt other structural types such as such as jettron.
Preferably, urea liquid pump connects urea pressure transducer, for detecting the pressure of urea liquid.Between liquid inlet pipe and three-way valve, net-filter assembly is set, for the impurity in filter urea solution, ensures the normal operation of urea system.
The structure of urea branch road: one end of liquid inlet pipe connects urea box, the other end of liquid inlet pipe connects net-filter assembly, and net-filter assembly, three-way valve, urea liquid pump, urea pressure transducer, drain pipe connect successively.
The structure of gas branch road: one end of suction tude connects source of the gas, the other end connected electromagnetic valve assembly of suction tude, and solenoid valve assembly connects steam outlet pipe, and solenoid valve assembly is connecting tee valve also.
In a preferred embodiment of the present utility model, urea pump also comprises mixing unit, and described mixing unit, for being communicated with drain pipe and steam outlet pipe, so, can make urea liquid and air carry out premix, optimizes the effect of catalytic reaction.In the present embodiment, mixing unit adopts three-way valve.
In an embodiment of the present utility model, between liquid inlet pipe, net-filter assembly, three-way valve, urea liquid pump, urea pressure transducer, drain pipe, adopt pipeline to connect, between suction tude, solenoid valve assembly, steam outlet pipe, adopt pipeline to connect.In other embodiments of the present utility model, directly can be connected by the passage carried between liquid inlet pipe, net-filter assembly, three-way valve, urea liquid pump, urea pressure transducer, drain pipe, also can be connected by other linkage structures, directly can be connected by the passage carried between suction tude, solenoid valve assembly, steam outlet pipe, also can be connected by other linkage structures, as long as the linkage structure that can realize the conveying of liquid and/or gas is all applicable to the utility model.
In an embodiment of the present utility model, source of the gas adopts vehicle-mounted pressurized air.In other embodiments of the present utility model, source of the gas also can adopt external compressed air.
Fig. 3 is the schematic flow sheet of the first working state of the urea pump provided according to an embodiment of the present utility model.As shown in Figure 3, in the present embodiment, the first working state is set to the state that urea pump is normally supplied urea.When the first working state, three-way valve makes conducting between liquid inlet pipe and urea liquid pump, and solenoid valve assembly makes conducting between suction tude and steam outlet pipe, blocks between solenoid valve assembly and three-way valve.Urea liquid passes through liquid inlet pipe, net-filter assembly, three-way valve, urea liquid pump, urea pressure transducer, drain pipe successively by urea box; Gas passes through suction tude, solenoid valve assembly, steam outlet pipe successively by source of the gas, subsequently, urea liquid in drain pipe and the gas in steam outlet pipe enter mixing unit mixing, and mixed solution is finally ejected in automobile exhaust pipe through mixed pipe line and carries out vent gas treatment work.
Fig. 4 is the schematic flow sheet of the second working state of the urea pump provided according to an embodiment of the present utility model.As shown in Figure 4, in the present embodiment, the second working state is set to the state that urea pump stops supplying urea.When the second working state, three-way valve makes conducting between liquid inlet pipe and urea liquid pump, and solenoid valve assembly makes conducting between suction tude and steam outlet pipe, conducting between solenoid valve assembly and three-way valve.Urea liquid is refluxed by drain pipe, and gas is by source of the gas successively by suction tude, solenoid valve assembly, and be then divided into two-way, the first via flows in steam outlet pipe, mixing unit, is got rid of by the residual urea in mixing unit; Second road flows to three-way valve, be further divided into two-way, wherein, 3rd road flows to net-filter assembly, liquid inlet pipe, and by urea liquid blowback to urea box, the 4th road flows in urea liquid pump, urea pressure transducer, drain pipe, mixing unit, residual urea in urea branch road is got rid of, avoid urea liquid to deposit in urea branch road and mixing unit, thus avoid that urea liquid is residual in pipeline to freeze and blocking pipeline, cause the problem that urea system cannot normally work.
Fig. 5 is the structure principle chart of the solenoid valve assembly of the urea pump provided according to an embodiment of the present utility model.As shown in Figure 5, in the present embodiment, solenoid valve assembly comprises the valve pocket, the first solenoid valve and the second solenoid valve that provide gas channel, described valve pocket has the first valve pocket mouth, the second valve pocket mouth and the 3rd valve pocket mouth, described first valve pocket mouth is connected with described air input part, described second valve pocket mouth is connected with three-way valve, described 3rd valve pocket mouth is connected with the described portion of giving vent to anger, first solenoid valve makes described first valve pocket mouth be communicated with described 3rd valve pocket mouth selectivity/block, and is also the keying of the first electromagnetic valve the 3rd valve pocket mouth; Second solenoid valve makes described first valve pocket mouth be communicated with described second valve pocket mouth selectivity/block, and is also the keying of the second electromagnetic valve second valve pocket mouth.Concrete, when urea pump is normally supplied urea, the first solenoid valve makes the first valve pocket mouth be communicated with the 3rd valve pocket mouth, and the second solenoid valve makes the first valve pocket mouth and the second valve pocket mouth block, and gas can only flow to from air input part portion of giving vent to anger.When urea pump stops supplying urea, first solenoid valve makes the first valve pocket mouth be communicated with the 3rd valve pocket mouth, and the second solenoid valve makes the first valve pocket mouth be communicated with the second valve pocket mouth, and gas both can flow to from air input part portion of giving vent to anger, three-way valve place can also be flowed to, by the easy blowback of urea of backflow to urea box.Preferably, valve pocket connects air pressure probe, for detecting gas pressure, according to the gas pressure detected, controls the opening degree of the first solenoid valve and/or the second solenoid valve, thus by gas pressure and flow control to required requirement.
Fig. 6 is the structure principle chart of the three-way valve of the urea pump provided according to an embodiment of the present utility model.As shown in Figure 6, in the present embodiment, three-way valve has three valve ports, is respectively the first valve port, the second valve port and the 3rd valve port, and these three valve ports can mutual conduction, form the passage passed through for urea liquid and/or gas, first valve port is connected with solenoid valve assembly, and the second valve port is connected with net-filter assembly, and net-filter assembly is connected with feed liquor portion, 3rd valve port is connected with urea liquid pump, and urea liquid pump is connected with fluid portion.Three-way valve comprises an one-way valve, can make the first valve port to the second valve port one-way conduction.By above-mentioned design, can work as urea pump of the present utility model stop supply urea solution time, gas can flow into from the first valve port, and store to urea box through the urea liquid blowback of the second valve port by backflow, and stop urea liquid to flow to the first valve port from the second valve port, and then flow to gas branch road.
Fig. 7 is the partial structurtes schematic diagram of the three-way valve of the urea pump provided according to an embodiment of the present utility model.Fig. 8 is the first working state schematic representation of the three-way valve provided according to Fig. 7.As shown in Figure 7, in the present embodiment, three-way valve comprises valve body 1, valve body 1 at least has the first valve port 11 and the second valve port 12, and connect the valve passage 13 of the first valve port 11 and the second valve port 12, flap 14 and flap reposition element 15 are set in valve passage 13, when normally supplying urea solution, flap 14 is resisted against on valve passage wall 131 under the elastic force of flap reposition element 15 and the pressure effect of urea liquid, block being communicated with of the first valve port 11 and the second valve port 12, thus prevent urea liquid inflow gas branch road.As shown in Figure 8, the first working state of three-way valve is set to urea pump and stops supplying urea the state of solution.When urea pump stops supplying urea solution, first valve port 11 of three-way valve is communicated with the second valve pocket mouth of solenoid valve assembly, second valve pocket mouth is communicated with the first valve pocket mouth, gas flows to the second valve pocket mouth successively by the first valve pocket mouth, first valve port 11, and flow in valve passage 13, under the effect of gas pressure, flap 14 is made to overcome the elastic force of flap reposition element 15 to the direction motion departing from valve passage wall 131, thus make to produce space between flap 14 and valve passage wall 131, gas thus space flows to the second valve port 12, thus realize the urea liquid blowback of backflow to urea box.By above-mentioned design, achieve the one-way conduction of the first valve port 11 to the second valve port 12.Preferably, flap 14 is globe disk, and flap reposition element 15 is spring.Preferably, between flap 14 and valve passage 13, be provided with sealing gasket 16, can sealing effect be improved on the one hand, can flap be protected on the other hand, extend its working life.
Fig. 9 is the structure principle chart of the cooling water branch road of the urea pump provided according to an embodiment of the present utility model.As shown in Figure 9, urea pump also comprises: cooling water branch road, cooling water branch road comprises: provide the inlet part of cooling water inlet, provide the outlet part of coolant outlet, and the 3rd switch gear be arranged between described inlet part and described outlet part, be communicated with for making selectivity between described inlet part with described outlet part/block.Inlet part at least comprises intake pipe, and outlet part at least comprises outlet pipe, and the 3rd switch gear at least comprises the 3rd solenoid valve.Preferably, cooling water branch road also comprises: buffer part, for cushioning the cooling water of input and/or the cooling water of output.By arranging buffer part, can cushion the cooling water of input on the one hand, avoiding the problem that cooling water excessive velocities affects heat exchange effect; Cooling water after heat exchange can be cushioned on the other hand, avoid the too high normal operation affecting engine-cooling system of cooling water pressure.Described buffer part comprises first passage and second channel, and wherein, first passage is used for cushioning the cooling water of input, and the cooling water that second channel is used for exporting cushions.
Comprise housing according to the urea pump that an embodiment of the present utility model provides, this housing limits the installing space of urea branch road, gas branch road and cooling water branch road.Housing body is structure ringwise, and its inside is become two installing spaces by baffle interval, is respectively the first installing space and the second installing space, then by two cover plates by each seal parts in two installing spaces.
Urea branch road comprises: the liquid inlet pipe being arranged at the first installing space of housing, and be arranged at the net-filter assembly of the second installing space, three-way valve, urea liquid pump, urea pressure transducer, drain pipe, one end of liquid inlet pipe is connected with the urea tube of urea liquid level sensor by the first installing space is protruding, the other end of liquid inlet pipe is connected with net-filter assembly, net-filter assembly, three-way valve, urea liquid pump, urea pressure transducer, drain pipe is in turn connected to form urea branch road, by the second installing space, the protruding mixed pipe line with being arranged on outside urea pump is connected drain pipe.
Gas branch road comprises: be arranged at the suction tude of the second installing space of housing, solenoid valve assembly and steam outlet pipe.Suction tude and steam outlet pipe protruding by the second installing space, be convenient to externally connected pipe.Wherein, solenoid valve assembly comprises valve seat, the first solenoid valve, the second solenoid valve and air pressure probe.Valve seat has valve pocket, the passage that this valve pocket provides gas to pass through, valve pocket has the first valve pocket mouth, the second valve pocket mouth and the 3rd valve pocket mouth, first valve pocket mouth is connected with suction tude, second valve pocket mouth is connected with three-way valve, 3rd valve pocket mouth is connected with steam outlet pipe, first solenoid valve and the second solenoid valve are all arranged on valve seat, wherein, first solenoid valve makes the first valve pocket mouth be communicated with the 3rd valve pocket mouth selectivity/block, second solenoid valve makes the first valve pocket mouth be communicated with the second valve pocket mouth selectivity/block, and controls the break-make between suction tude and three-way valve further.By most of parts of urea branch road and gas branch road are all installed in the second installing space, are conducive to optimizing pipe-line layout, save installing space.
Cooling water branch road: comprise the intake pipe of the second installing space being arranged at housing, the 3rd solenoid valve and outlet pipe, intake pipe and outlet pipe protruding by the second installing space; And be arranged at the tortuous first passage of the first installing space and the second channel of housing, wherein, intake pipe is connected by the first entrance with first passage, the water-cooling tube of first passage and urea liquid level sensor exports by first and is connected, the water-cooling tube of urea liquid level sensor is connected by the second entrance with second channel, and second channel and outlet pipe export by second and be connected.When needs enter cooling water, 3rd solenoid valve is opened, the cooling water coming from engine-cooling system is entered by intake pipe, successively through the 3rd solenoid valve, the first entrance, first passage, the first outlet, then in the water-cooling tube entering urea liquid level sensor, the urea liquid in urea tube is heated, cooling water after heat exchange enters the second entrance, and the cooling system place getting back to motor after second channel and the second outlet carries out the cooling work of motor, reaches the effect recycled.The utility model is by the tortuous first passage of design and second channel, can as the buffer space of cooling water, thus control its flow velocity and pressure, flow velocity both can be avoided too fast and do not reached the problem of sufficient heat exchange, the large problem affecting engine-cooling system of pressure surge can have been avoided again.By intake pipe and outlet pipe being installed in same installing space, and first passage and second channel are installed in another installing space, and layout pipeline like this can save installing space.
Urea pump, urea liquid level sensor and urea box is comprised according to the urea system that an embodiment of the present utility model provides.Urea pump is connected with urea liquid level sensor, and entirety is loaded on urea box.
Urea liquid level sensor comprises fixed base, and one end of fixed base is fixedly connected with urea pump, and the other end of fixed base stretches into in urea box, and and adopts radial seal between urea box.As shown in Figure 10, in the present embodiment, urea box 3 madial wall radially offers groove, arranges seal ring 4 in this groove, makes seal ring 4 between the radial outside wall and urea box 3 madial wall of fixed base 2.
Urea liquid level sensor is provided with water-cooling tube and urea tube, is connected respectively with cooling water branch road and urea branch road.Wherein, water-cooling tube comprises: the first water-cooling tube and the second water-cooling tube, and the first water-cooling tube is connected with the second water-cooling tube, the first outlet of the external urea pump of the first water-cooling tube, second entrance of the external urea pump of the second water-cooling tube, thus realize recycling of cooling water.Urea tube is connected with the liquid inlet pipe of urea pump, realizes urea liquid in urea box to be input to urea pump.
Urea pump of the present utility model not only can realize the function of conventional urea pump, gas can also be utilized by the urea liquid blowback of backflow to urea box, realize blowback (or claiming blowback) function of urea, effectively prevent the problem that urea liquid deposits in pipeline.Meanwhile, urea pump of the present utility model is also integrated with cooling water on-off control device, facilitates the centralized management of control unit, decreases the installing space of each components and parts, saves connecting pipeline, and depot is without the need to carrying out secondary assembling.
In description of the present utility model, it is to be appreciated that term " first ", " second ", " the 3rd ", only for being distinguished in description, not special implication.
It is to be understood that; above-mentioned embodiment is only preferred embodiment of the present utility model and institute's application technology principle; in technical scope disclosed in the utility model; the change that any those skilled in the art of being familiar with easily expect or replacement, all should be encompassed in protection domain of the present utility model.
Claims (10)
1. a urea pump, is characterized in that, comprising: urea branch road and gas branch road,
Wherein, urea branch road comprises:
Feed liquor portion, solution inlet of supplying urea;
Fluid portion, taphole of supplying urea;
Urea liquid pump, the power of solution by described feed liquor portion to described fluid portion of supplying urea;
First switch gear, is communicated with for making selectivity between described feed liquor portion with described fluid portion;
Gas branch road comprises:
Air input part, provides gas access;
To give vent to anger portion, gas outlet is provided;
Second switch device, is communicated with described selectivity between portion of giving vent to anger for making described air input part;
Wherein, described first switch gear is connected with described second switch device, is communicated with described gas branch road selectivity to make described urea branch road.
2. urea pump according to claim 1, is characterized in that, also comprises: cooling water branch road,
Described cooling water branch road comprises:
Inlet part, provides cooling water inlet;
Outlet part, provides coolant outlet;
3rd switch gear, is communicated with for making selectivity between described inlet part with described outlet part.
3. urea pump according to claim 1, is characterized in that, described fluid portion is communicated with by mixing unit with described giving vent to anger between portion.
4. urea pump according to claim 1, it is characterized in that, described first switch gear comprises: three-way valve, described three-way valve has three valve ports, be respectively the first valve port, the second valve port and the 3rd valve port, described first valve port is connected with described second switch device, and described second valve port is connected with described feed liquor portion, described 3rd valve port is connected with described urea liquid pump, and described urea liquid pump is connected with described fluid portion.
5. urea pump according to claim 4, is characterized in that, described first valve port to described second valve port is one-way conduction.
6. urea pump according to claim 1, it is characterized in that, described second switch device comprises solenoid valve assembly, described solenoid valve assembly comprises the valve pocket, the first solenoid valve that provide gas channel, described valve pocket has the first valve pocket mouth, the second valve pocket mouth and the 3rd valve pocket mouth, described first valve pocket mouth is connected with described air input part, described second valve pocket mouth is connected with described first switch gear, described 3rd valve pocket mouth is connected with the described portion of giving vent to anger, and described first solenoid valve makes described first valve pocket mouth be communicated with described 3rd valve pocket mouth selectivity.
7. urea pump according to claim 6, is characterized in that, described solenoid valve assembly also comprises the second solenoid valve, and described second solenoid valve makes described first valve pocket mouth be communicated with described second valve pocket mouth selectivity.
8. the urea pump according to claim 6 or 7, is characterized in that, described urea liquid pump connects urea pressure transducer, for detecting the pressure of urea liquid; And/or,
Described valve pocket connects air pressure probe, for detecting gas pressure.
9. a urea system, is characterized in that, comprises the urea pump as described in any one of claim 1 to 8, urea liquid level sensor and urea box, and described urea pump is connected with described urea liquid level sensor, and entirety is loaded on described urea box.
10. urea system according to claim 9, it is characterized in that, described urea liquid level sensor comprises fixed base, and one end of described fixed base is fixedly connected with described urea pump, the other end of described fixed base stretches into in described urea box, and and adopts radial seal between described urea box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520266874.1U CN204646378U (en) | 2015-04-27 | 2015-04-27 | Urea pump and comprise its urea system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520266874.1U CN204646378U (en) | 2015-04-27 | 2015-04-27 | Urea pump and comprise its urea system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204646378U true CN204646378U (en) | 2015-09-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819039A (en) * | 2015-04-27 | 2015-08-05 | 东莞正扬电子机械有限公司 | Urea pump and urea system containing same |
| CN109252923A (en) * | 2018-09-18 | 2019-01-22 | 潍柴动力股份有限公司 | Gas helps formula urea injection system and its lower electric blowing method |
| CN112648052A (en) * | 2020-12-25 | 2021-04-13 | 一汽解放汽车有限公司 | Urea tank pressure maintaining control system and maintenance method thereof |
| CN113107653A (en) * | 2021-04-27 | 2021-07-13 | 广西卡迪亚科技有限公司 | Control method of engine SCR tail gas emission post-treatment system |
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2015
- 2015-04-27 CN CN201520266874.1U patent/CN204646378U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819039A (en) * | 2015-04-27 | 2015-08-05 | 东莞正扬电子机械有限公司 | Urea pump and urea system containing same |
| CN104819039B (en) * | 2015-04-27 | 2018-09-25 | 东莞正扬电子机械有限公司 | Urea pump and urea system comprising it |
| CN109252923A (en) * | 2018-09-18 | 2019-01-22 | 潍柴动力股份有限公司 | Gas helps formula urea injection system and its lower electric blowing method |
| CN109252923B (en) * | 2018-09-18 | 2020-06-26 | 潍柴动力股份有限公司 | Air-assisted urea injection system and lower electric blowing method thereof |
| CN112648052A (en) * | 2020-12-25 | 2021-04-13 | 一汽解放汽车有限公司 | Urea tank pressure maintaining control system and maintenance method thereof |
| CN112648052B (en) * | 2020-12-25 | 2022-03-25 | 一汽解放汽车有限公司 | Urea tank pressure maintaining control system and maintenance method thereof |
| CN113107653A (en) * | 2021-04-27 | 2021-07-13 | 广西卡迪亚科技有限公司 | Control method of engine SCR tail gas emission post-treatment system |
| CN113107653B (en) * | 2021-04-27 | 2022-09-23 | 广西沃宾电子科技有限责任公司 | Control method of engine SCR tail gas emission post-treatment system |
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Address after: Room 101, No. 1, East Ring 3rd Street, Jitiagang, Huangjiang Town, Dongguan City, Guangdong Province, 523750 Patentee after: Guangdong Zhengyang Sensor Technology Co.,Ltd. Address before: No. 1, Donghuan 3rd Street, Huangjiang Town, Dongguan City, Guangdong Province, 523750 Patentee before: DONGGUAN ZHENGYANG ELECTRONIC MECHANICAL Co.,Ltd. |