CN217300686U - Urea solution heating and supplying system - Google Patents

Abstract

The application relates to the technical field of exhaust purification treatment of internal combustion engines, and discloses a urea solution heating and supplying system, which comprises a urea box, a urea pump, an ejector, an engine and a heating liquid inlet integrated pipe; the heating and liquid feeding integrated pipe is provided with a first urea branch pipe and a first hot water branch pipe which are arranged in parallel and adjacent to each other and extend along the length direction of the heating and liquid feeding integrated pipe; a urea liquid outlet of the urea box is connected to the urea pump through the first urea branch pipe, and the urea pump is connected with the ejector; the urea box is characterized in that a hot water pipe is further arranged in the urea box, one end of the hot water pipe is connected with the engine, the other end of the hot water pipe is connected with the first hot water branch pipe, and the first hot water branch pipe is further connected with the engine. The system can utilize the heated water generated in the running process of the engine to heat the urea solution in the system device, does not need to consume the electric energy of the whole vehicle, and ensures the normal work of the tail gas purification treatment system.

Description

Urea solution heating and supplying system

Technical Field

The application relates to the technical field of exhaust purification treatment of internal combustion engines, in particular to a urea solution heating and supplying system.

Background

The automobile is an extremely important vehicle in modern society, and the internal combustion engine of the automobile, especially the diesel internal combustion engine, contains a large amount of nitrogen oxides in exhaust emission, thereby causing pollution to the atmospheric environment. With the increasing awareness of human beings on the protection of the living environment, the emission standards of automobile exhaust are regulated at home and abroad, and therefore, the purification treatment of the automobile exhaust becomes necessary.

In the prior art, Selective Catalytic Reduction (SCR) technology is commonly used to remove nitrogen oxides from engine exhaust emissions. For example, a urea injector injects a urea aqueous solution into an exhaust pipe, the urea aqueous solution releases ammonia gas under high temperature, and the ammonia gas and nitrogen oxides in engine exhaust gas undergo an oxidation-reduction reaction in an SCR (selective catalytic reduction) catalyst to produce nitrogen and water, so that the aim of reducing the emission of the nitrogen oxides is fulfilled. However, when the ambient temperature is low, the urea aqueous solution can easily reach the freezing point, and in order to ensure the normal transportation of the urea aqueous solution, a resistance wire heating mode is usually adopted in the prior art, but the heating mode has high cost, high failure rate and complex production process, and the heating resistance wire needs to consume a large amount of power of the engine.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application is directed to overcoming the deficiencies in the prior art and providing a heating and feeding system for urea solution.

The technical scheme of the application is as follows:

a urea solution heating and supplying system comprises a urea box, a urea pump, an ejector, an engine and a heating liquid inlet integrated pipe;

the heating liquid inlet integrated pipe is provided with a first urea branch pipe and a first hot water branch pipe which are arranged adjacently in parallel and extend along the length direction of the heating liquid inlet integrated pipe;

a urea liquid outlet of the urea box is connected to the urea pump through the first urea branch pipe, and the urea pump is connected with the ejector;

still be equipped with the hot-water line in the urea case, the one end of hot-water line with the engine is connected, the other end with first hot water is in charge of the union coupling, first hot water still with the engine is connected.

Preferably, the pipe wall of the first urea branch pipe is integrally connected with the pipe wall of the first hot water branch pipe;

or a heat conduction belt is arranged between the pipe wall of the first urea branch pipe and the pipe wall of the first hot water branch pipe in a clinging mode along the length direction of the heating liquid inlet integrated pipe.

Furthermore, the outer sides of the first urea branch pipe and the first hot water branch pipe are coated with heat insulation layers.

Preferably, one end of the hot water pipe is connected with the engine through a water inlet pipe, and the first hot water branch pipe is connected with the engine through a water outlet pipe;

or one end of the hot water pipe is connected with the engine through a water outlet pipe, and the first hot water branch pipe is connected with the engine through a water inlet pipe;

the water inlet pipe is provided with an electromagnetic valve.

Preferably, the urea pump is connected with the ejector through a urea liquid outlet pipe.

Preferably, the heating and liquid-discharging integrated pipe is further provided with a second urea branch pipe and a second hot water branch pipe which are adjacently arranged in parallel and extend along the length direction of the heating and liquid-discharging integrated pipe;

the pipe wall of the second urea branch pipe is integrally connected with the pipe wall of the second hot water branch pipe, or a heat conduction belt is arranged between the pipe wall of the second urea branch pipe and the pipe wall of the second hot water branch pipe in a manner of being tightly attached to the length direction of the heating liquid outlet integrated pipe;

the urea pump with the sprayer passes through the second urea and divides the union coupling, the second hot water divides the union coupling to be set up first hot water divide the union coupling with the pipeline that the engine is connected.

Preferably, the urea box is further provided with a urea return port, and the urea return port is connected with the urea pump.

Furthermore, the urea return port is connected with the urea pump through a urea return pipe.

The heating liquid return integrated pipe is provided with a third urea branch pipe and a third hot water branch pipe which are parallelly and adjacently arranged and extend along the length direction of the heating liquid return integrated pipe;

the pipe wall of the third urea branch pipe is integrally connected with the pipe wall of the third hot water branch pipe, or a heat conduction belt is arranged between the pipe wall of the third urea branch pipe and the pipe wall of the third hot water branch pipe in a manner of being tightly attached to the length direction of the heating liquid return integrated pipe;

the urea liquid return port is connected with the urea pump through the third urea branch pipe, and the third hot water branch pipe is arranged on a pipeline, connected with the engine, of one end of the hot water pipe.

Preferably, the injector is further provided with a urea injection pipe, and the urea injection pipe penetrates through the pipe wall of the exhaust pipe and extends into the exhaust pipe.

This application has following advantage:

the application provides a urea solution heating feed system, through the system that introduces this application with the heating water that produces among the engine operation process, has ensured the normal transmission of urea aqueous solution under extreme temperature, has ensured the normal work of tail gas purification processing system. Furthermore, this application integrates hot water pipeline and aqueous urea solution pipeline to integrative in the pipe, through the heat radiation effect of water, can be with in the hot water branch pipe come from the urea aqueous solution that engine heating water self heat transfer divides the pipe to adjacent urea to prevent that urea aqueous solution from taking place to solidify because of the low temperature in the transmission course, and influence SCR aftertreatment system's normal work, also greatly reduced the pipeline cost in the system. Meanwhile, the hot water pipe connected with the engine is arranged in the urea box, so that the temperature of the urea solution in the urea box is favorably increased, the stable existence of the urea solution in the urea box is ensured, and the stability of the whole system is further improved.

Compared with the traditional resistance wire heating mode, the heating water generated by the engine is introduced, the heating of the urea solution transmission line is realized, and the normal operation of the SCR aftertreatment system in a low-temperature environment is met. In addition, the urea solution heating and supplying system is simple in structure, low in manufacturing cost and low in system failure rate, does not need to additionally consume the power of an engine and the electric energy of the whole vehicle, and contributes to the dynamic property and the economical efficiency of the whole vehicle to a certain extent.

In order to make the aforementioned objects, features and advantages of the present application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 shows a schematic structural diagram of embodiment 1 of the present application;

FIG. 2 is a sectional view showing an A-A section in the structure of example 1 of the present application;

FIG. 3 is a cross-sectional view of section A-A of another embodiment of the present application;

FIG. 4 is a schematic diagram illustrating the configuration of hot water lines in a urea tank according to further embodiments of the present disclosure;

FIG. 5 shows a schematic structural diagram of embodiment 3 of the present application;

fig. 6 shows a schematic structural diagram of embodiment 4 of the present application.

Description of the main element symbols:

1-a urea tank; 2-a urea pump; 3-an ejector; 4-an engine; 5-heating the liquid inlet integrated pipe; 6-urea liquid outlet pipe; 7-urea return pipe; 8-heating the liquid outlet integrated pipe; 9-heating the liquid returning integrated pipe; 10-a hot water pipe; 11-a water inlet pipe; 12-a water outlet pipe; 13-a solenoid valve; 14-an exhaust pipe; 15-urea pipe joint; 1000-a urea outlet; 1001-urea return port; 300-urea injection pipe; 501-a first urea branch pipe; 502-a first hot water shunt tube; 503-heat insulation layer; 504-thermally conductive tape; 801-a second urea branch pipe; 802-second hot water branch pipe; 901-a third urea branch pipe; 902-third hot water partial pipe.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for purposes of illustration only.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the templates is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

As shown in fig. 1, the present embodiment provides a urea solution heating and supplying system, which includes a urea tank 1, a urea pump 2, an injector 3, an engine 4, and a heating liquid inlet integrated pipe 5;

wherein, heating feed liquor integration pipe 5 has parallel adjacent arrangement, and follows the first urea that the integrative pipe length direction of heating feed liquor extends divides pipe 501 and first hot-water branch pipe 502, the urea liquid outlet 1000 of urea case 1 is connected to urea pump 2 through first urea branch pipe 501, and urea pump 2 passes through urea drain pipe 6 and is connected with sprayer 3.

A hot water pipe 10 is arranged in the urea box 1, one end of the hot water pipe 10 is connected with the engine 4 through a water inlet pipe 11, an electromagnetic valve 13 is arranged on the water inlet pipe 11, the other end of the hot water pipe is connected with a first hot water branch pipe 502, and the first hot water branch pipe 502 is further connected with the engine 4 through a water outlet pipe 12. The solenoid valve 13 on the inlet tube 11 is through the one-way transmission function who utilizes solenoid valve 13, can prevent that the rivers in the pipeline from taking place the refluence phenomenon, and influences the transmission efficiency of hot water, can also adjust the size of hot water rivers simultaneously, prevents that water pressure too big causes entire system to appear the potential safety hazard.

Fig. 2 is a sectional view of the heating liquid-feeding integrated pipe 5 of the present embodiment along the direction a-a, in which the first urea branch pipe 501 and the first hot water branch pipe 502 are two branch pipes parallel to each other and extending along the length direction of the integrated double-pipe. The pipe walls of the two branch pipes are integrally connected, and the outer sides of the two branch pipes are also covered with heat insulation layers 503. That is, when the integrated pipe is manufactured, the same material, such as stainless steel material, aluminum plastic material, steel plastic material, etc., is selected, the two sub-pipes are integrally cast through a mold, and after the molding, the outer sides of the two sub-pipes are coated with the heat insulation layer 503 to prevent the heat loss inside the sub-pipes in the transmission process. The material of the heat insulation layer can be polyethylene or rubber plastic material.

In other embodiments, the cross-sectional view of the heating liquid-integrated pipe 5 along the direction A-A is shown in FIG. 3. The first urea branch pipe 501 and the first hot water branch pipe 502 are separated independently, and can be used for producing different branch pipes independently, and the pipe wall materials of the two branch pipes can be selected from the same material or different materials, so that the good heat transfer function is ensured. Then, the two branch pipes are placed in parallel and combined together, the heat conduction belt 504 is arranged between the pipe walls of the two branch pipes in a clinging mode along the length direction of the heating liquid inlet integrated pipe 5, the heat conduction belt 504 has the effect of accelerating heat exchange of the two branch pipes, and the heat transfer efficiency between the two branch pipes is improved. Similarly, the outer sides of the two branch pipes are also required to be covered with heat insulating layers 503.

It should be noted that, in the technical solution of the present application, the cross-sectional profile structure of all the integrated pipes composed of the urea-containing branch pipe and the hot water branch pipe may be any shape, such as a perfect circle, an ellipse, a polygon or an irregular shape. The size of the pipe wall and the diameter of the pipe of the two branch pipes are not limited, but in order to ensure the heat transfer efficiency, the pipe walls of the two branch pipes are as thin as possible, so that the heat transfer can be promoted; the diameter of the hot water branch pipe is close to or larger than that of the urea branch pipe as much as possible, and the heat transfer efficiency is also ensured.

In all embodiments of the present application, common urea pipe joints 15 can be used for communication between different pipes, between the pipe and the urea tank 1, between the pipe and the urea pump 2, and between the pipe and the injector 3, especially at the interface between the urea pump 2 and the injector 3, and it is particularly necessary to pay attention to the material selection of the connectors, which is mainly to prevent the urea solution from corroding the connectors so that the urea solution leaks out. For the connector between pipelines for transmitting the heated water generated by the engine, attention should be paid to the material of the connector which is resistant to high temperature. The technical scheme of this application does not limit the concrete structure of these connectors, can select according to actual need.

In this embodiment, the hot water pipe 10 in the urea tank 1 is a straight pipe, and the material thereof may be a metal material, or another material that is easy to conduct heat. The metal pipe has small heat transfer resistance and good heat conduction effect, and can quickly transfer the heat of the hot water in the hot water pipe 10 to the urea solution stored in the urea box 1.

In other embodiments, the hot water pipe 10 may be a coiled pipe, see fig. 4. In still other embodiments, the hot water pipe 10 may be an elbow pipe bent at different angles. The purpose of selecting the spiral pipe or the bent pipe is mainly to increase the contact area between the hot water pipe and the urea solution in the urea box, accelerate the dissipation of the water heat in the hot water pipe and improve the heat transmission efficiency.

In this embodiment, the injector 3 is further provided with a urea injection pipe 300, and the urea injection pipe 300 passes through the pipe wall of the exhaust pipe 14 and extends into the exhaust pipe 14, so that when the injector 3 performs injection, the injected urea solution can be intensively sent into the exhaust pipe 14 to perform exhaust gas purification treatment.

In the urea solution heating and supplying system of the present embodiment, the flow path of the urea solution is: the urea solution in the urea box 1 flows into the first urea branch pipe 501 of the heating liquid inlet integrated pipe 5 through the urea liquid outlet 1000 of the urea box, then enters the urea pump 2, and then flows into the injector 3 through the urea liquid outlet pipe 6, and then is intensively injected into the exhaust pipe 14 through the urea injection pipe 300.

In the urea solution heating and supplying system of the present embodiment, the flow route of the heating water transmitted from the engine is: the heated water firstly passes through the electromagnetic valve 13 on the water inlet pipe 11, and then flows into the hot water pipe 10 of the urea tank 1, so as to heat the urea solution in the urea tank 1, and then continuously flows into the first hot water branched pipe 502 of the heating liquid inlet integrated pipe 5, so as to heat the urea solution in the first urea branched pipe 501, and finally flows into the water outlet pipe 12 and then is transmitted to the circulating water system of the engine.

In other embodiments, one end of the hot water pipe 10 of the urea tank 1 is connected to the engine 4 through an outlet pipe 12, the other end is connected to the first hot water branch pipe 502, the first hot water branch pipe 502 is further connected to the engine 4 through an inlet pipe 11, and the inlet pipe 11 is provided with an electromagnetic valve 13. In these embodiments, the flow path of the heated water delivered by the engine is: after passing through the electromagnetic valve 13 of the water inlet pipe 11, the heated water flows into the first hot water branch pipe 502 of the heating liquid inlet integrated pipe 5 to heat the urea solution in the first urea branch pipe 501, then flows into the hot water pipe 10 of the urea tank 1 to heat the urea solution in the urea tank 1, and finally flows into the water outlet pipe 12 to be transmitted to the circulating water system of the engine.

If under cold environmental condition, through with the engine operation in-process produced add during hot water passes through inlet tube 11, outlet pipe 12 introduces this system, can heat the urea aqueous solution in the urea case fast, prevent that urea aqueous solution from crossing because of the temperature is low and solidifying, simultaneously through utilizing integrative siphuncle, also can ensure that urea solution can be smoothly from the urea case transmit to the urea pump, prevent that the urea pump from receiving urea aqueous solution, and influence subsequent exhaust-gas treatment.

Example 2

The present embodiment provides a urea heating supply system, which has the same structure as that of embodiment 1, except that the urea pump 2 of the present embodiment is not connected to the injector 3 through the urea outlet pipe 6, but connected to the injector 3 through the second urea branch pipe 801 in the heating liquid outlet integrated pipe 8.

Specifically, the structure of the heating liquid outlet integrated pipe 8 is similar to that of the heating liquid inlet integrated pipe 5 in embodiment 1, and the heating liquid outlet integrated pipe also has a second urea branch pipe 801 and a second hot water branch pipe 802 which are adjacently arranged in parallel and extend along the length direction of the heating liquid outlet integrated pipe. The second urea branch pipe 801 is used for connecting the urea pump 2 with the injector 3, and the second hot water branch pipe 802 is arranged on a pipeline connecting the first hot water branch pipe 502 with the engine 4.

It should be noted that the outer surfaces of the hot liquid outlet integrated pipe 8 and the heating liquid inlet integrated pipe 5 of the present embodiment are coated with some heat insulating materials, so as to ensure that the temperature of the transmitted hot water is not greatly dissipated, thereby improving the heat conduction efficiency of the system.

In this embodiment, heated water generated during the operation of the engine firstly passes through the electromagnetic valve 13 on the water inlet pipe 11, then flows into the hot water pipe 10 of the urea tank 1, heats the urea solution in the urea tank 1, continuously flows into the first hot water branch pipe 502 of the heating liquid inlet integrated pipe 5, heats the urea solution in the first urea branch pipe 501, then flows into the second hot water branch pipe 802 of the heating liquid outlet integrated pipe 8, heats the urea solution in the second urea branch pipe 801, finally flows into the water outlet pipe 12, and is transmitted to the circulating water system of the engine, so that the urea solution can smoothly enter the urea pump from the urea tank, then enters the ejector for ejection treatment, and the stability of the system is further improved.

In other embodiments, after the heated water enters the water inlet pipe 11, the heated water flows into the second hot water branch pipe 802 of the heated liquid outlet integrated pipe 8 to heat the urea solution in the second urea branch pipe 801, then flows into the first hot water branch pipe 502 of the heated liquid inlet integrated pipe 5, then flows into the hot water pipe 10 of the urea tank 1, and finally is transmitted to the circulating water system of the engine through the water outlet pipe 12. Therefore, the heating effect of the urea solution can be realized, and the urea solution in the whole system is prevented from being solidified in a low-temperature environment.

Example 3

In the present embodiment, in addition to embodiment 2, the urea tank 1 of the present embodiment is further provided with a urea return port 1001, and the urea return port 1001 is connected to the urea pump 2 through a urea return pipe 7, as shown in fig. 5.

The method mainly aims to enable residual urea solution in the urea pump to flow back to the urea box completely after the vehicle is flameout, so that the problem that the residual urea solution in the urea pump is solidified and blocked after the environmental temperature is reduced to influence the transmission of the urea solution after the subsequent vehicle is restarted and further influence the tail gas purification is solved, the resource consumption is reduced, and the working efficiency of the SCR post-treatment system is greatly improved.

Example 4

As shown in fig. 6, the present embodiment provides a urea heating and supplying system, which further includes, in addition to embodiment 2, a heated returned liquid integrated pipe 9, where the heated returned liquid integrated pipe 9 has a third urea branch pipe 901 and a third hot water branch pipe 902 which are adjacently arranged in parallel and extend along the length direction of the heated returned liquid integrated pipe.

In this embodiment, the structure of the heating-returning-liquid integrated pipe 9 is similar to that of the heating-returning-liquid integrated pipe 5 in embodiment 1, and the outer surface of the pipe wall is coated with a heat-insulating layer for heat preservation.

In this embodiment, the urea tank 1 is also provided with a urea return port 1001, and the urea return port 1001 is connected to the urea pump 2 through a third urea branch pipe 901 of the heating return liquid integrated pipe 9. The third hot water branch pipe 902 of the heating liquid return integrated pipe 9 is arranged on a pipeline connecting one end of the hot water pipe 10 of the urea tank 1 with the engine 4.

In the urea solution heating and supplying system of the present embodiment, the flow path of the urea solution is: the urea solution in the urea tank 1 flows into the first urea branch pipe 501 of the heating liquid inlet integrated pipe 5 through the urea liquid outlet 1000 of the urea tank 1, and then enters the urea pump 2. When the tail gas treatment is performed on the urea solution in the urea pump 2, the urea solution flows into the injector 3 through the second urea branch pipe 801 of the heating liquid outlet integrated pipe 8, passes through the urea injection pipe 300, and is intensively injected into the exhaust pipe 14; when the tail gas treatment operation is stopped, the urea solution in the urea pump 2 flows into the third urea branch pipe 901 of the heating liquid return integrated pipe 9, and then flows back to the urea tank through the urea liquid return port 1001.

In the urea solution heating supply system of the present embodiment, the flow route of the heated water in the engine is: after passing through the electromagnetic valve 13 of the water inlet pipe 11, the heated water flows into the third hot water branch pipe 902 of the heating liquid return integrated pipe 9, the urea solution in the third urea branch pipe is heated, then flows into the hot water pipe 10 of the urea tank 1, the urea solution in the urea tank 1 is heated, then flows into the first hot water branch pipe 502 of the heating liquid inlet integrated pipe 5, heats the first urea branch pipe 501, then flows into the second hot water branch pipe 802 after passing through the water outlet pipe 12 communicated between the first hot water branch pipe 502 and the second hot water branch pipe 802 of the heating liquid outlet integrated pipe 8, heats the second urea branch pipe 801, and finally flows back into the circulating water system of the engine through the water outlet pipe 12.

In other embodiments, when the water inlet pipe 11 is communicated with the second hot water branch pipe 802 in the heating liquid outlet integrated pipe 8, and the water outlet pipe 12 is communicated with the third hot water branch pipe 902, the heated water in the engine passes through the electromagnetic valve of the water inlet pipe 11, then the heated water heats the second urea branch pipe 801, flows into the first hot water branch pipe 502, heats the first urea branch pipe 501, then flows into the hot water pipe 10 and the third hot water branch pipe 902 in the urea tank 1 in sequence, enters the water outlet pipe 12, and flows back to the engine circulating water system.

The pipeline for conveying the urea solution to the urea pump 2, the pipeline for conveying the urea solution to the ejector 3 by the urea pump 2 and the pipeline for refluxing the urea solution to the urea tank 1 by the urea pump 2 are heated simultaneously in the urea tank 1, so that the whole urea solution conveying and supplying system is heated and protected, and the whole system can still stably work in a low-temperature environment.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. A urea solution heating and supplying system is characterized by comprising a urea box, a urea pump, an ejector, an engine and a heating liquid inlet integrated pipe;

the heating liquid inlet integrated pipe is provided with a first urea branch pipe and a first hot water branch pipe which are arranged adjacently in parallel and extend along the length direction of the heating liquid inlet integrated pipe;

a urea liquid outlet of the urea box is connected to the urea pump through the first urea branch pipe, and the urea pump is connected with the ejector;

the urea box is characterized in that a hot water pipe is further arranged in the urea box, one end of the hot water pipe is connected with the engine, the other end of the hot water pipe is connected with the first hot water branch pipe, and the first hot water branch pipe is further connected with the engine.

2. The heating system for urea solution as claimed in claim 1, wherein the wall of the first urea branch pipe is integrally joined to the wall of the first hot water branch pipe;

or a heat conduction belt is arranged between the pipe wall of the first urea branch pipe and the pipe wall of the first hot water branch pipe in a clinging mode along the length direction of the heating liquid inlet integrated pipe.

3. The heating supply system for urea solution according to claim 2, wherein the first urea branch pipe and the first hot water branch pipe are externally coated with heat insulating layers.

4. The heating supply system for urea solution according to claim 1, wherein one end of said hot water pipe is connected to said engine through a water inlet pipe, and said first hot water branch pipe is connected to said engine through a water outlet pipe;

or one end of the hot water pipe is connected with the engine through a water outlet pipe, and the first hot water branch pipe is connected with the engine through a water inlet pipe;

the water inlet pipe is provided with an electromagnetic valve.

5. The heated urea solution supply system of claim 1, wherein the urea pump is coupled to the injector via a urea outlet conduit.

6. The heating supply system for urea solution according to claim 1, further comprising a heating effluent integrated pipe, wherein the heating effluent integrated pipe is provided with a second urea branch pipe and a second hot water branch pipe which are arranged adjacently in parallel and extend along the length direction of the heating effluent integrated pipe;

the pipe wall of the second urea branch pipe is integrally connected with the pipe wall of the second hot water branch pipe, or a heat conduction belt is arranged between the pipe wall of the second urea branch pipe and the pipe wall of the second hot water branch pipe in a clinging manner along the length direction of the heating liquid outlet integral pipe;

the urea pump with the sprayer passes through the second urea and divides the union coupling, the second hot water divides the union coupling to be set up first hot water divide the union coupling with the pipeline that the engine is connected.

7. The heating and supplying system of any one of claims 1 to 6, wherein the urea tank is further provided with a urea return port, and the urea return port is connected to the urea pump.

8. The heated urea solution supply system of claim 7, wherein the urea return port is connected to the urea pump via a urea return line.

9. The heating supply system for urea solution according to claim 7, further comprising a heating liquid-returning integrated pipe having a third urea branch pipe and a third hot water branch pipe which are adjacently arranged in parallel and extend along the length direction of the heating liquid-returning integrated pipe;

the pipe wall of the third urea branch pipe is integrally connected with the pipe wall of the third hot water branch pipe, or a heat conduction belt is arranged between the pipe wall of the third urea branch pipe and the pipe wall of the third hot water branch pipe in a manner of being tightly attached to the length direction of the heating liquid return integrated pipe;

the urea liquid return port is connected with the urea pump through the third urea branch pipe, and the third hot water branch pipe is arranged on a pipeline, connected with the engine, of one end of the hot water pipe.

10. The heating and supplying system of claim 1, wherein said injector is further provided with a urea injection pipe, said urea injection pipe penetrates through the wall of the exhaust pipe and extends into the interior of said exhaust pipe.

Images