CN210105950U

CN210105950U - Urea system assembly

Info

Publication number: CN210105950U
Application number: CN201920836322.8U
Authority: CN
Inventors: 何军; 盛振海; 沈武识
Original assignee: NINGBO CHUNHUA AUTO FITTINGS CO Ltd
Current assignee: NINGBO CHUNHUA AUTO FITTINGS CO Ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2020-02-21
Anticipated expiration: 2029-06-04

Abstract

The utility model provides a urea system assembly which comprises a urea box, a urea box bracket and a sensor, the urea box bracket is fixed on the urea box, the urea box bracket can be used for installing the urea box on an automobile, the sensor is arranged on the urea box, the urea box comprises a first cavity, a connecting cavity and a second cavity, the connecting cavity is communicated with the first cavity and the second cavity, urea solution is conveyed to the first cavity through the first liquid inlet, the periphery of the second cavity is provided with a heat preservation cavity which is arranged on the outer surface of the second cavity and can preserve heat of liquid in the second cavity, therefore, the crystallization phenomenon of urea in the second cavity is avoided, the whole device is simple in structure and ingenious in design, and the pollution of automobile exhaust can be effectively reduced.

Description

Urea system assembly

Technical Field

The utility model belongs to the technical field of car auxiliary assembly technique and specifically relates to a urea system assembly.

Background

With the development of automobile technology, as the standard of automobile exhaust emission becomes stricter and stricter, most medium and heavy truck products are added with an after-treatment system in an exhaust system; the post-treatment system is characterized in that a urea pump in a urea tank is pressurized by the urea pump and finally sprayed into an exhaust pipe together with NO in tail gas_xAnd carrying out oxidation-reduction reaction, thereby achieving the purpose of reducing pollutant emission. However, because the system has a high requirement on the purity of the urea aqueous solution, when the urea tank is filled with urea, impurities are required to be reduced for the urea tank, and the urea tank in the prior art generally directly fills urea into the urea tank without impurity filtration; in addition, urea in the urea tank in the prior art is also prone to crystallization, so that the urea cannot be injected into the exhaust pipe, and therefore the whole SCR aftertreatment system cannot normally operate.

SUMMERY OF THE UTILITY MODEL

A main object of the utility model is to provide a urea system assembly, its difference of overcoming prior art, it is equipped with the filter screen, can carry out impurity filtering to urea liquid to make the urea liquid purity that gets into in the exhaust pipe higher, accelerated NO among all the other tail gases from this_xThe oxidation-reduction reaction speed is high, so that the pollutants can be treated quickly, and the aim of quickly reducing the emission of the pollutants is fulfilled.

Another object of the utility model is to provide a urea system assembly, it passes through sensor, heat preservation chamber and heating device, can be timely carry out the heat preservation heating to urea liquid to avoided urea liquid to take place the crystallization and leaded to its phenomenon emergence that can't spout into the blast pipe.

Another object of the utility model is to provide a urea system assembly, it is equipped with the washing shower nozzle, can in time wash the filter screen fast to avoid the filter screen to lead to filtering normal emergence down normally owing to filter the very thick filter cake of formation for a long time effectively, thereby guaranteed the purity that gets into the interior urea liquid of second cavity.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a urea system assembly includes urea case, urea case support and sensor, urea case support is fixed in on the urea case, the sensor install in on the urea case, the urea case includes first cavity, connection chamber and second cavity, connect the chamber intercommunication first cavity and the second cavity, the periphery of second cavity is equipped with the heat preservation chamber, the heat preservation chamber set up in the surface of second cavity.

According to the utility model discloses an embodiment, connect the intracavity and be equipped with filter screen, first valve and second valve, the filter screen install in connect the intracavity, first valve install in the left side of filter screen, the second valve install in the right side of filter screen.

According to the utility model discloses an embodiment, be equipped with first inlet and first liquid outlet on the first cavity, first inlet is seted up in the upper end of first cavity, first liquid outlet is seted up in the lower extreme of first cavity.

According to the utility model discloses an embodiment, it further is equipped with the pipeline of slagging tap to connect the intracavity, the pipeline intercommunication of slagging tap connect the chamber and first liquid outlet, be equipped with the third valve on the pipeline of slagging tap, the third valve control the switching of the pipeline of slagging tap.

According to the utility model discloses an embodiment, the sensor includes control module, first driving motor, second driving motor and inductive probe, inductive probe connect in control module, control module controls respectively first driving motor and second driving motor, first driving motor control first valve and opening and shutting of second valve, second driving motor control opening and shutting of third valve.

According to the utility model discloses an embodiment, the heat preservation intracavity is equipped with heating device, control module control heating device, heating device can be right the water of heat preservation intracavity heats.

According to the utility model discloses an embodiment, be equipped with washing terminals on the inner wall in connection chamber, washing terminals divides to locate the both sides of filter screen, control module control opening and shutting of washing terminals.

The utility model has the advantages that: by adopting the technical scheme, the utility model is provided with the filter screen, so that the urea liquid can be filtered before entering the second cavity, the purity of the urea liquid in the second cavity is effectively ensured, the purity of the urea liquid entering the exhaust pipe is higher, the reaction speed between the urea liquid and the tail gas is accelerated, and the treatment efficiency of the SCR post-treatment system is improved; the sensing probe is arranged and can rapidly sense the water level and the temperature of the urea liquid in the second cavity, so that the urea liquid in the second cavity can be rapidly supplemented under the control of the control module, or the urea liquid in the second cavity is heated by the heating device, and the crystallization phenomenon is avoided; the heat preservation cavity is arranged, so that the urea liquid in the second cavity can not be directly heated, and the condition that the urea liquid is easily polluted in the heating process is effectively avoided; the heating device is provided with the second cavity, and the volume of the second cavity is small, so that the heating process is quick, the energy requirement in the heating process is reduced, and the resources are saved; the washing sprayer is arranged on the filter screen, so that the filter screen can be timely and quickly washed, and the situation that the filter screen cannot be normally carried out due to the fact that a thick filter cake is easily formed by long-term filtration is avoided.

Drawings

Fig. 1 is a front view of a preferred embodiment according to the present invention.

Fig. 2 is a top view of a preferred embodiment according to the present invention.

Figure 3 is a cross-sectional view taken along a-a of figure 2 according to the present invention.

Fig. 4 is an enlarged schematic view at B in fig. 3 according to the present invention.

Fig. 5 is a schematic diagram of the modular operation of the sensor according to the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

As shown in fig. 1 to 5, a urea system assembly 1 includes a urea tank 10, a urea tank bracket 20 and a sensor 30, the urea tank bracket 20 is fixed on the urea tank 10, the urea tank bracket 20 is provided with a plurality of mounting holes, the urea tank bracket 20 allows the urea tank 10 to be mounted on an automobile through the plurality of mounting holes, the sensor 30 is mounted on the urea tank 10, the urea tank 10 includes a first cavity 11, a connecting cavity 12 and a second cavity 13, the connecting cavity 12 communicates with the first cavity 11 and the second cavity 13, urea solution is conveyed to the first cavity 11 through the first inlet 111, the second cavity 13 is lower than the first cavity 11 in height, urea solution in the first cavity 11 flows into the second cavity 13 through the connecting cavity 12, a heat preservation cavity 131 is provided at the periphery of the second cavity 13, the heat preservation cavity 131 is arranged on the outer surface of the second cavity 13, the heat preservation cavity 131 can preserve heat of liquid in the second cavity 13, so that crystallization of urea in the second cavity 13 can be avoided, and meanwhile, because the volume of the second cavity 13 is far smaller than that of the first cavity 11, the urea liquid in the second cavity 13 can be heated only by small energy, so that the whole device is more humanized and energy is saved.

Wherein, be equipped with filter screen 121, first valve 122 and second valve 123 in connecting chamber 12, filter screen 121 install in connecting chamber 12, first valve 122 install in the left side of filter screen 121, second valve 123 install in the right side of filter screen 121, first valve 122 can be controlled urea liquid in the first cavity 11 flows into connecting chamber 12, second valve 123 can be controlled urea liquid in connecting chamber 12 flows into connecting chamber 12The second cavity 13, the filter screen 121 can filter the urea solution flowing out of the first cavity 11, so that impurities in the urea solution can be effectively prevented from entering the second cavity 13, the purity of the urea solution in the second cavity 13 is improved, and NO in the urea solution and automobile exhaust is enabled to be in contact with the urea solution_xThe efficiency of the oxidation-reduction reaction is improved, thereby achieving the purpose of reducing the exhaust emission pollution.

The first cavity 11 is provided with a first liquid inlet 111 and a first liquid outlet 112, the first liquid inlet 111 is disposed at the upper end of the first cavity 11, external urea liquid is conveyed into the first cavity 11 through the first liquid inlet 111, the first liquid outlet 112 is disposed at the lower end of the first cavity 11, and the urea liquid in the first cavity 11 is discharged through the first liquid outlet 112.

Wherein, it further is equipped with slag discharging pipe 124 in the connection chamber 12, slag discharging pipe 124 communicates connect chamber 12 and first liquid outlet 112, be equipped with third valve 126 on the slag discharging pipe 124, third valve 126 control the switching of slag discharging pipe 124 works as control module 31 control the spray rinsing shower nozzle is right after filter screen 121 washs, control module 31 can be controlled second driving motor 33, second driving motor 33 can drive third valve 126 is opened, and the waste liquid after the washing can pass through slag discharging pipe 124 flows into first liquid outlet 112, and the waste liquid after washing can be followed from this first liquid outlet 112 discharges.

Wherein, the sensor 30 includes a control module 31, a first driving motor 32, a second driving motor 33 and an inductive probe 34, the inductive probe 34 is connected to the control module 31, the control module 31 is connected to the first driving motor 32 and the second driving motor 33 respectively, the control module 31 can control the first driving motor 32 and the second driving motor 33 respectively, the first driving motor 32 is connected to the first valve 122 and the second valve 123 respectively, the first driving motor 32 controls the opening and closing of the first valve 122 and the second valve 123, the second motor 33 is connected to the second valve 33The second driving motor 33 controls the opening and closing of the third valve 126, the inductive probe 34 can sense the temperature and the water level in the second chamber 13, when the inductive probe 34 senses that the water level in the second chamber 13 is lower than the height of the inductive probe 34, the inductive probe 34 can transmit the sensed data to the control module 31, the control module 31 can control the first driving motor 32 and the second driving motor 33 respectively, the second driving motor 33 can control the third valve 126 to close, the third valve 126 can block the slag outlet pipe 124, the first driving motor 32 can control the first valve 122 and the second valve 123 to open, and the first chamber 11, the connection chamber 12 and the second chamber 13 are communicated in sequence, therefore, the urea solution in the first cavity 11 can flow into the second cavity 13 through the connecting cavity 12, and the sensing probe 34 timely transmits the sensed data to the control module 31, so that a certain amount of urea solution is maintained in the second cavity 13 at any time, and then the urea solution and NO in the tail gas are maintained for the subsequent process_xThe oxidation-reduction reaction is carried out to provide a basis; when the sensing probe 34 senses that the temperature of the urea liquid in the second cavity 13 is low, the sensing probe 34 transmits the sensed temperature data to the control module 31, and the control module 31 controls the heating device 132 in the heat preservation cavity 131 to heat the water in the cavity, so that the temperature of the urea liquid in the second cavity 13 is increased under the action of heat conduction, and when the sensing probe 34 senses that the temperature of the urea liquid in the second cavity 13 reaches a set value (the set value refers to an optimum temperature of the urea liquid in a liquid state), the control module 31 controls the heating device 132 to stop heating, so that the temperature of the urea liquid in the second cavity 13 is maintained at the optimum temperature, thereby effectively avoiding the crystallization of the urea liquid in the second cavity 13, so that the phenomenon that the whole SCR after-treatment system cannot normally go on because the crystal of the SCR after-treatment system cannot be sprayed into the exhaust pipe subsequently due to the crystallization of the SCR after-treatment system can not happen.

Wherein, a heating device 132 is arranged in the heat preservation cavity 131, the control module 31 controls the heating device 132, and the heating device 132 can heat the water in the heat preservation cavity 131. When the temperature in the second cavity 13 is lower than a set value as sensed by the sensing probe 34, the control module 31 controls the heating device 132 to heat the water in the heat-preserving cavity 131, so that the water in the heat-preserving cavity 131 can heat the urea solution in the second cavity 13 under the action of heat conduction, so that the urea solution is always kept at an optimum temperature, and is ready for being rapidly sprayed into the exhaust pipe and performing an oxidation-reduction reaction with the exhaust gas in the exhaust pipe, and the urea solution in the second cavity 13 is heated by the heat-preserving cavity 131, so that the urea solution in the second cavity 13 is prevented from being polluted due to the fact that the urea solution in the second cavity 13 is directly heated, the purity of the urea solution in the second cavity 13 is improved, and the interaction efficiency between the urea solution subsequently entering the exhaust pipe and the automobile exhaust gas is accelerated, therefore, the aim of reducing the pollution of the automobile exhaust is achieved.

Wherein, a washing nozzle 125 is disposed on an inner wall of the connection cavity 12, the washing nozzle 125 is disposed on two sides of the filter screen 121, the control module 31 controls the washing nozzle 125 to open and close, when a water level of the urea solution in the second cavity 13 reaches a set value, the control module 31 controls the first driving motor 32, the first driving motor 32 controls the first valve 122 and the second valve 123 to close, at this time, the connection cavity 12 forms a closed cavity, and then the control module 31 controls the washing nozzle 125 to open, under the action of the control module 31, the washing nozzle 125 can deliver outside water to a nozzle end of the washing nozzle 125 through a water pipe, and since the nozzle end of the washing nozzle 125 is aligned with the filter screen 121, the washing nozzle 125 can clean the filter screen 121, after the cleaning is completed, the control module 31 can control the second driving motor 33, the second driving motor 33 can control the third valve 126 to open, and at this time, the slag discharge pipe 124 can communicate with the connecting cavity 12 and the first liquid outlet 112, so that the waste liquid in the connecting cavity 12 can be discharged through the slag discharge pipe 124 and the first liquid outlet 112, thereby quickly cleaning the filter screen 121 in the connecting cavity 12, and effectively avoiding the situation that the filter screen 121 cannot be filtered due to the formation of a thick filter cake after long-term filtration.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a urea system assembly, its characterized in that, includes urea case, urea case support and sensor, urea case support is fixed in on the urea case, the sensor install in on the urea case, the urea case includes first cavity, connects chamber and second cavity, connect the chamber intercommunication first cavity and the second cavity, the periphery of second cavity is equipped with the heat preservation chamber, the heat preservation chamber set up in the surface of second cavity.

2. The urea system assembly of claim 1, wherein a filter screen, a first valve, and a second valve are disposed in the connection chamber, the filter screen is installed in the connection chamber, the first valve is installed on the left side of the filter screen, and the second valve is installed on the right side of the filter screen.

3. The urea system assembly of claim 2, wherein the first cavity has a first inlet and a first outlet, the first inlet is disposed at an upper end of the first cavity, and the first outlet is disposed at a lower end of the first cavity.

4. The urea system assembly of claim 3, wherein a slag tapping pipeline is further arranged in the connecting cavity, the slag tapping pipeline is communicated with the connecting cavity and the first liquid outlet, a third valve is arranged on the slag tapping pipeline, and the third valve controls the opening and closing of the slag tapping pipeline.

5. The urea system assembly of claim 4, wherein the sensor comprises a control module, a first driving motor, a second driving motor, and an inductive probe, the inductive probe is connected to the control module, the control module controls the first driving motor and the second driving motor respectively, the first driving motor controls the first valve and the second valve to open and close respectively, and the second driving motor controls the third valve to open and close respectively.

6. The urea system assembly of claim 5, wherein a heating device is disposed within the holding chamber, and wherein the control module controls the heating device to heat water within the holding chamber.

7. The urea system assembly of claim 6, wherein the inner wall of the connection cavity is provided with a washing nozzle, the washing nozzles are respectively arranged on two sides of the filter screen, and the control module controls the opening and closing of the washing nozzles.