Urea tank assembly

Abstract

The invention discloses a urea tank assembly, comprising a tank body, an end cover, a heating block, an outer pipe component and an inner pipe component. The top of the tank body is provided with an end cover, and a heating block is provided above the end cover, the heating block is made of heat-conducting solid metal, the outer pipe component comprises a urea return pipe, a urea absorption pipe and a coolant water pipe, the inner pipe component comprises a urea absorption inner pipe, a urea return inner pipe and a spiral heating pipe, and a water outlet is provided at one end of the urea return inner pipe away from the end cover, and the water outlet is attached to the surface of the spiral heating pipe. The invention can effectively and fully transfer heat, quickly thaw the urea liquid in the urea tank, and at the same time maintain the temperature of the external urea pipeline to prevent the external urea pipeline from being frozen, and the urea absorption pipe can also absorb enough urea liquid for circulation.

Description

Technical Field

[0001] The invention belongs to the technical field of urea tanks, and in particular relates to a urea tank assembly. Background Art

[0002] In order to ensure that the urea supply system can work normally in cold weather, the urea tank assembly must be equipped with a defrosting and heating function. The urea defrosting and heating is divided into three parts: urea tank heating, urea supply unit heating, and urea pipeline heating. There are two ways to heat the urea tank, electric heating and cooling water heating. An electric heater is arranged inside the urea tank, and the battery power is used for heating. This arrangement is simple in structure, without engine cooling water connection pipelines, and the power consumption of a single battery is particularly large, so it is rarely used. Cooling water heating is to arrange a heat exchanger in the urea tank, and use the heat of the engine cooling water to heat the frozen urea liquid in the urea tank.

[0003] In the prior art, the cooling water is heated and transferred to the urea pipe through a heat exchanger, which has poor thermal conductivity, incomplete thawing inside the urea tank, and the external urea pipe is easily frozen. The urea suction pipe cannot absorb enough urea liquid, affecting the circulation of the urea liquid. Summary of the invention

[0004] In view of the above problems, the technical problem to be solved by the present invention is to provide a urea tank assembly, including a tank body, an end cover, a heating block, an outer pipe assembly and an inner pipe assembly;

[0005] The top of the box body is provided with an end cover;

[0006] The end cover is provided with a first hole, a second hole, a third hole, a water valve hole and a sensor hole;

[0007] A heating block is arranged above the end cover, and a first through hole, a second through hole and a third through hole are opened at the lower end of the heating block, and the positions of the first through hole, the second through hole and the third through hole on the end cover correspond to the positions of the first through hole, the second through hole and the third through hole on the heating block respectively;

[0008] The heating block is a heat-conducting solid metal, and the outside of the heating block is respectively connected with a urea absorption pipe quick interface, a coolant pipe quick interface and a urea return pipe quick interface;

[0009] The outer pipeline assembly includes a urea return pipe, a urea absorption pipe and a coolant water pipe, the urea return pipe is connected to the urea return pipe quick interface, the urea absorption pipe is connected to the urea absorption pipe quick interface, the coolant water pipe is connected to the coolant pipe quick interface, and the urea return pipe and the urea absorption pipe are both tightly attached to the outer surface of the coolant water pipe;

[0010] The ends of the urea absorption pipe and the urea return pipe away from the heating block are provided with urea pump quick connectors, and the urea pump quick connectors are made of heat-conducting solid metal;

[0011] The inner pipe assembly includes a urea absorption inner pipe, a urea return inner pipe and a spiral heating pipe, wherein the urea absorption inner pipe is connected to the urea absorption pipe through the first hole and the first through hole, the urea return inner pipe is connected to the urea return pipe through the third hole and the third through hole, one end of the spiral heating pipe is connected to the coolant water pipe through the second hole and the second through hole, and the other end is connected to the water valve hole;

[0012] An end of the urea return inner tube away from the end cover is provided with a water outlet, and the water outlet is attached to the surface of the spiral heating tube.

[0013] Preferably, a urea pump quick connector buckle is provided on the outside of the urea pump quick connector.

[0014] Preferably, the urea return inner pipe is connected to the third hole through a connecting pipe.

[0015] Preferably, a fastener is provided below the end cover, and four fasteners are provided and are respectively threadedly connected to the first hole, the second hole, the third hole and the water valve hole at the bottom of the end cover.

[0016] Preferably, a sensor is connected to the end cover through a sensor hole, and a water valve is connected to the end cover through a water valve hole.

[0017] Preferably, a filter port is provided on the upper right side of the box body.

[0018] Preferably, a liquid discharge port is provided at the bottom of the box body.

[0019] Preferably, the heating block is embedded above the end cover.

[0020] Preferably, the heating block is made of stainless steel.

[0021] Preferably, a rubber gasket is provided on the outer surface below the end cover.

[0022] Beneficial effects of the present invention: a urea tank assembly of the present invention can heat the urea in the urea tank by coolant water, the heating block is a heat-conducting solid metal, heat-conducting and anti-freezing, the urea return pipe and the urea absorption pipe are in close contact with the coolant water pipe for heat conduction, and the external pipeline components are prevented from freezing, and the water outlet of the urea return inner pipe is attached to the surface of the spiral heating pipe, so that the refluxed urea liquid flows along the heating pipe to the bottom of the urea tank, which is convenient for the urea absorption inner pipe to absorb enough urea liquid when the urea liquid is not completely thawed; and the urea pump quick connectors on the urea absorption pipe and the urea return pipe are heat-conducting solid metal, which can better conduct heat, prevent the urea liquid from being frozen in the pipeline before entering the pump, and have better heat conduction function. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] For ease of explanation, the present invention is described in detail with reference to the following specific embodiments and accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the urea liquid heating cycle structure;

[0025] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the inner tube structure of the urea return tube;

[0027] Figure 4 It is a schematic diagram of the structure of the end cover and the inner pipe assembly;

[0028] Figure 5 It is a top view of the end cover;

[0029] Figure 6 A top view of the heating block;

[0030] Figure 7 It is a schematic diagram of the heating block structure;

[0031] Figure 8 This is a schematic diagram of the urea pump quick connector structure.

[0032] In the figure: 1-urea absorption pipe quick interface; 2-coolant pipe quick interface; 3-urea return pipe quick interface; 4-end cover; 5-urea absorption inner tube; 6-urea return inner tube; 7-water valve hole; 8-spiral heating tube; 9-urea return tube; 10-urea absorption tube; 11-coolant water pipe; 12-fastener; 13-heating block; 14-water outlet; 15-connecting pipe; 16-rubber gasket; 17-sensor hole; 18-water valve; 19-sensor; 20-filter port; 21-liquid discharge port; 22-tank; 23 urea pump quick connector; 24-urea pump quick connector buckle; 1-1-first through hole; 2-1-second through hole; 3-1-third through hole; 4-1-first hole; 4-2-second hole; 4-3-third hole. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0034] like Figure 1-8 As shown, a urea tank assembly of the present invention is characterized by comprising a tank body 22, an end cover 4, a heating block 13, an outer pipe assembly and an inner pipe assembly;

[0035] The top of the box body 22 is provided with an end cover 4;

[0036] The end cover 4 is provided with a first hole 4-1, a second hole 4-2, a third hole 4-3, a water valve hole 7 and a sensor hole 17;

[0037] A heating block 13 is disposed above the end cover 4, and a first through hole 1-1, a second through hole 2-1 and a third through hole 3-1 are opened at the lower end of the heating block 13. The positions of the first hole 4-1, the second hole 4-2 and the third hole 4-3 on the end cover correspond to the positions of the first through hole 1-1, the second through hole 2-1 and the third through hole 3-1 on the heating block respectively;

[0038] The heating block 13 is a heat-conducting solid metal, and the outside of the heating block 13 is respectively connected with a urea absorption pipe quick interface 1, a coolant pipe quick interface 2 and a urea return pipe quick interface 3;

[0039] The outer pipe assembly includes a urea return pipe 9, a urea absorption pipe 10 and a coolant water pipe 11, the urea return pipe 9 is connected to the urea return pipe quick interface 3, the urea absorption pipe 10 is connected to the urea absorption pipe quick interface 1, the coolant water pipe 11 is connected to the coolant pipe quick interface 2, and the urea return pipe 9 and the urea absorption pipe 10 are both tightly attached to the outer surface of the coolant water pipe 11;

[0040] The ends of the urea absorption pipe 10 and the urea return pipe 9 away from the heating block 13 are provided with urea pump quick connectors 23, and the urea pump quick connectors 23 are made of heat-conducting solid metal;

[0041] The inner pipe assembly includes a urea absorption inner pipe 5, a urea return inner pipe 6 and a spiral heating pipe 8. The urea absorption inner pipe 5 is connected to the urea absorption pipe 10 through the first hole 4-1 and the first through hole 1-1, and the urea return inner pipe 6 is connected to the urea return pipe 9 through the third hole 4-3 and the third through hole 3-1. One end of the spiral heating pipe 8 is connected to the coolant water pipe 11 through the second hole 4-2 and the second through hole 2-1, and the other end is connected to the water valve hole 7;

[0042] An end of the urea return inner tube 6 away from the end cover 4 is provided with a water outlet 14 , and the water outlet 14 is attached to the surface of the spiral heating tube 8 .

[0043] Specifically, a urea pump quick connector buckle 24 is provided outside the urea pump quick connector 23 , and the urea return inner pipe 6 is connected to the third hole 4 - 3 through a connecting pipe 15 .

[0044] Specifically, a fastener 12 is provided below the end cover 4 , and four fasteners 12 are provided and are respectively threadedly connected to the first hole 4 - 1 , the second hole 4 - 2 , the third hole 4 - 3 and the water valve hole 7 at the bottom of the end cover 4 .

[0045] Specifically, the end cover 4 is connected with a sensor 19 through a sensor hole 17 , and the end cover is connected with a water valve 18 through a water valve hole 7 .

[0046] Specifically, a filter port 20 is provided at the upper right side of the box body 22 , and a liquid discharge port 21 is provided at the bottom of the box body 22 .

[0047] Specifically, the heating block 13 is embedded above the end cover 4. The heating block 13 is made of stainless steel.

[0048] Specifically, a rubber gasket 16 is provided on the outer surface below the end cover 4 .

[0049] Its working principle is as follows: the coolant water of the motor vehicle first enters the spiral heating tube 8 through the water valve hole 7 on the end cover 4, thaws and heats the urea liquid in the urea tank 22, contacts the urea liquid over a larger area through the spiral portion of the spiral heating tube 8, and then flows out through the second hole 4-2 of the end cover 4 and the second through hole 2-1 of the heating block 13, and flows out from the coolant water pipe 11 through the coolant pipe quick connector 2, completing the heating cycle.

[0050] After the urea inner tube 5 absorbs the thawed urea liquid, it flows out into the urea pump through the heating block 13 and the urea absorption pipe 10, and the urea absorption pipe 10 is in close contact with the coolant water pipe 11 for heat conduction to prevent the urea liquid in the urea absorption pipe 10 from being frozen, and the excess urea liquid in the urea pump passes through the urea return pipe 9 that is in close contact with the coolant water pipe 11 for heat conduction, and passes through the urea return pipe quick connector 3 on the heating block 13 and the third hole 4-3 on the end cover 4, flows into the connecting pipe 15 and the urea return inner tube 6, and then flows into the bottom of the urea tank from the water outlet 14 attached to the surface of the spiral heating tube 8, so that the urea inner tube 5 can absorb enough urea liquid when the urea liquid is not completely thawed.

[0051] In a urea tank assembly of the present invention, cooling water directly enters the spiral heating tube 8 in the urea tank through the water valve hole 7, which can effectively and fully transfer heat and quickly thaw the urea liquid in the urea tank. The cooling water then passes through the inside of the heating block 13 and connects to the external urea pipeline to maintain the temperature of the external urea pipeline and prevent the external urea pipeline from being frozen. The urea absorption pipe can also absorb enough urea liquid for circulation.

[0052] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A urea tank assembly, characterized in that: It comprises a box body (22), an end cover (4), a heating block (13), an outer pipe assembly and an inner pipe assembly; The top of the box body (22) is provided with an end cover (4); The end cover (4) is provided with a first hole (4-1), a second hole (4-2), a third hole (4-3), a water valve hole (7) and a sensor hole (17); A heating block (13) is arranged above the end cover (4); a first through hole (1-1), a second through hole (2-1) and a third through hole (3-1) are provided at the lower end of the heating block (13); the positions of the first hole (4-1), the second hole (4-2) and the third hole (4-3) on the end cover respectively correspond to the positions of the first through hole (1-1), the second through hole (2-1) and the third through hole (3-1) on the heating block; The heating block (13) is made of heat-conducting solid metal, and the outside of the heating block (13) is respectively connected to a urea absorption pipe quick connector (1), a coolant pipe quick connector (2), and a urea return pipe quick connector (3); The external pipe assembly comprises a urea return pipe (9), a urea absorption pipe (10) and a coolant water pipe (11); the urea return pipe (9) is in communication with a urea return pipe quick connector (3); the urea absorption pipe (10) is in communication with a urea absorption pipe quick connector (1); the coolant water pipe (11) is in communication with a coolant pipe quick connector (2); and the urea return pipe (9) and the urea absorption pipe (10) are both tightly attached to the outer surface of the coolant water pipe (11); A urea pump quick connector (23) is provided at one end of the urea absorption pipe (10) and the urea return pipe (9) away from the heating block (13), and the urea pump quick connector (23) is made of heat-conducting solid metal; The inner pipe assembly comprises a urea absorption inner pipe (5), a urea return inner pipe (6) and a spiral heating pipe (8); the urea absorption inner pipe (5) is connected to the urea absorption pipe (10) through the first hole (4-1) and the first through hole (1-1); the urea return inner pipe (6) is connected to the urea return pipe (9) through the third hole (4-3) and the third through hole (3-1); one end of the spiral heating pipe (8) is connected to the coolant water pipe (11) through the second hole (4-2) and the second through hole (2-1); and the other end is connected to the water valve hole (7); An end of the urea return inner tube (6) away from the end cover (4) is provided with a water outlet (14), and the water outlet (14) is attached to the surface of the spiral heating tube (8).

2. A urea tank assembly according to claim 1, characterized in that: A urea pump quick connector buckle (24) is provided outside the urea pump quick connector (23).

3. The urea tank assembly according to claim 1, characterized in that: The urea return inner pipe (6) is connected to the third hole (4-3) via a connecting pipe (15).

4. The urea tank assembly according to claim 1, characterized in that: A fastener (12) is provided below the end cover (4), and four fasteners (12) are provided and are respectively threadedly connected to a first hole (4-1), a second hole (4-2), a third hole (4-3) and a water valve hole (7) at the bottom of the end cover (4).

5. The urea tank assembly according to claim 1, characterized in that: The end cover (4) is connected to a sensor (19) via a sensor hole (17), and the end cover is connected to a water valve (18) via a water valve hole (7).

6. The urea tank assembly according to claim 1, characterized in that: The upper right side of the box body (22) is provided with a filter port (20).

7. The urea tank assembly according to claim 1, characterized in that: The bottom of the box body (22) is provided with a liquid discharge port (21).

8. The urea tank assembly according to claim 1, characterized in that: The heating block (13) is embedded above the end cover (4).

9. The urea tank assembly according to claim 1, characterized in that: The heating block (13) is made of stainless steel.

10. The urea tank assembly according to claim 1, characterized in that: A rubber gasket (16) is provided on the outer surface below the end cover (4).

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