Pressure vessel of commercial vehicle tail gas after-treatment system

Abstract

The invention relates to the technical field of automobile aftertreatment systems, and particularly discloses a pressure container of a commercial vehicle tail gas aftertreatment system.A storage tank is provided with a filling port communicated with a containing cavity, the two ends of a filling pipe in the length direction of the filling pipe serve as the liquid inlet end and the liquid outlet end respectively, and the liquid outlet end is inserted into the filling port in a sealed mode; the urea solution can enter the containing cavity through the liquid inlet end and the liquid outlet end in sequence, the sealing assembly comprises a sealing cover, the sealing cover comprises a cover plate and a side plate connected to the cover plate in the circumferential direction, the sealing cover detachably covers the liquid inlet end, the side plate abuts against the peripheral wall of the filling pipe in an attached mode, and the cover plate covers the liquid inlet end. According to the arrangement, the filling pipe is introduced and matched with the sealing assembly, so that external dust, moisture or other pollutants can be prevented from entering the storage tank, the purity of the urea solution is improved, volatilization of the urea solution is reduced, the concentration stability of the urea solution is guaranteed, and therefore the efficiency and stability of the commercial vehicle tail gas aftertreatment system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile after-treatment systems, and in particular to a pressure vessel of a commercial vehicle exhaust after-treatment system. Background Art

[0002] As national emission standards for diesel vehicle exhaust pollutants become increasingly stringent, meeting these standards requires controlling the concentrations of exhaust pollutants such as particulate matter, nitrogen oxides, hydrocarbons, and carbon monoxide. Among the numerous automotive exhaust treatment technologies, selective catalytic reduction (SCR) is widely used due to its high efficiency and reliability. It primarily uses urea solution as a reducing agent to convert nitrogen oxides (NOx) in exhaust gas into harmless nitrogen (N2) and water vapor (H2O), effectively reducing NOx emissions. Because automotive urea solution plays a key role in this process, it has become an essential product for commercial vehicles. Because the quality and purity of automotive urea are crucial to the performance and service life of the components in the SCR system, extra care must be taken to prevent any impurities or contaminants from entering the urea solution.

[0003] Therefore, there is an urgent need for a pressure vessel for a commercial vehicle exhaust after-treatment system to solve the above problems. Summary of the Invention

[0004] The object of the present invention is to provide a pressure vessel for a commercial vehicle exhaust after-treatment system, which can improve the purity of the urea solution and enhance the efficiency and stability of the commercial vehicle exhaust after-treatment system.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a pressure vessel for a commercial vehicle exhaust after-treatment system, comprising:

[0007] A storage tank, wherein the storage tank is provided with a receiving cavity, and the receiving cavity is used to store urea solution;

[0008] A filling pipe, wherein the storage tank is provided with a filling port connected to the accommodating chamber, and the two ends of the filling pipe along its length direction are respectively a liquid inlet end and a liquid outlet end, and the liquid outlet end is sealed and inserted into the filling port, and the urea solution can enter the accommodating chamber through the liquid inlet end and the liquid outlet end in sequence;

[0009] A sealing assembly, the sealing assembly includes a sealing cover, the sealing cover includes a cover plate, and a side plate circumferentially connected to the cover plate, the sealing cover is removably covered and arranged at the liquid inlet end, the side plate is fitted and abutted against the outer peripheral wall of the filling pipe, and the cover plate is covered on the liquid inlet end.

[0010] As a preferred technical solution for the pressure vessel of the above-mentioned commercial vehicle exhaust after-treatment system, the sealing assembly also includes a first sealing member, which is arranged between the filling pipe and the side plate, and the first sealing member is sleeved on the outer peripheral wall of the filling pipe and abuts against the outer peripheral edge of the liquid inlet end.

[0011] As a preferred technical solution for the pressure vessel of the above-mentioned commercial vehicle exhaust after-treatment system, a first groove is formed on the outer side wall of the filling pipe, and the first sealing member is embedded in the first groove.

[0012] As a preferred technical solution for the pressure vessel of the above-mentioned commercial vehicle exhaust after-treatment system, the first sealing member is in a circular ring shape.

[0013] As a preferred technical solution for the pressure vessel of the above-mentioned commercial vehicle exhaust after-treatment system, the first sealing member is made of rubber material.

[0014] As an optimal technical solution for the pressure vessel of the above-mentioned commercial vehicle exhaust after-treatment system, the sealing assembly also includes a second sealing member, which is sleeved on the outer peripheral wall of the filling pipe and abuts against and fits between the filling pipe and the side plate.

[0015] As a preferred technical solution for the pressure vessel of the above-mentioned commercial vehicle exhaust after-treatment system, the first seal and the second seal are spaced apart along the length direction of the filling pipe, and the first seal is closer to the liquid inlet end than the second seal.

[0016] As a preferred technical solution for the pressure vessel of the above-mentioned commercial vehicle exhaust after-treatment system, a second groove is formed on the outer side wall of the filling pipe, and the second sealing member is embedded in the second groove.

[0017] As a preferred technical solution for the pressure vessel of the above-mentioned commercial vehicle exhaust after-treatment system, the second sealing member is in a ring shape.

[0018] As a preferred technical solution for the pressure vessel of the above-mentioned commercial vehicle exhaust after-treatment system, the second sealing member is made of rubber material.

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides a pressure vessel for a commercial vehicle exhaust after-treatment system. The pressure vessel comprises a storage tank, a filling pipe, and a sealing assembly. The storage tank has a receiving chamber for storing a urea solution. The storage tank is provided with a filling port connected to the receiving chamber. The filling pipe has two ends along its length, respectively, a liquid inlet and a liquid outlet. The liquid outlet is sealed and plugged into the filling port. The urea solution can enter the receiving chamber through the liquid inlet and the liquid outlet in sequence. The sealing assembly comprises a sealing cover, which includes a cover plate and a side plate circumferentially connected to the cover plate. The sealing cover is detachably mounted on the liquid inlet. The side plate abuts against the outer peripheral wall of the filling pipe. The cover plate covers the liquid inlet. With this arrangement, the introduction of the filling pipe and the combination of the sealing assembly can prevent external dust, moisture, or other contaminants from entering the storage tank, thereby improving the purity of the urea solution and reducing the volatilization of the urea solution, ensuring the stable concentration of the urea solution, thereby improving the efficiency and stability of the commercial vehicle exhaust after-treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a pressure vessel of a commercial vehicle exhaust after-treatment system provided by the present invention;

[0022] Figure 2 An exploded view of the filling pipe and sealing assembly provided by the present invention;

[0023] Figure 3 A cross-sectional view of the filling pipe and sealing assembly provided by the present invention.

[0024] in:

[0025] 1. Storage tank; 2. Filling pipe;

[0026] 3. Sealing cover; 31. Cover plate; 32. Side plate;

[0027] 4. First sealing member; 5. Second sealing member. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0030] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed or removable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0031] Unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0033] like Figures 1 to 3As shown, this embodiment provides a pressure vessel of a commercial vehicle exhaust after-treatment system, which includes: a storage tank 1, a filling pipe 2 and a sealing assembly. The storage tank 1 is provided with a accommodating chamber for storing urea solution. The storage tank 1 is provided with a filling port connected to the accommodating chamber. The filling pipe 2 has two ends along its length direction, namely a liquid inlet end and a liquid outlet end, and the liquid outlet end is sealed and inserted into the filling port. The urea solution can enter the accommodating chamber through the liquid inlet end and the liquid outlet end in sequence. The sealing assembly includes a sealing cover 3, which includes a cover plate 31 and a side plate 32 circumferentially connected to the cover plate 31. The sealing cover 3 is detachably covered at the liquid inlet end, the side plate 32 is in contact with the outer peripheral wall of the filling pipe 2, and the cover plate 31 is covered on the liquid inlet end. Such a configuration, introducing the filling pipe 2 and cooperating with the sealing component can prevent external dust, moisture or other pollutants from entering the storage tank 1, improve the purity of the urea solution, and reduce the volatilization of the urea solution, ensuring the stability of the concentration of the urea solution, thereby improving the efficiency and stability of the commercial vehicle exhaust after-treatment system.

[0034] Optionally, in order to further enhance the sealing effect between the sealing cover 3 and the filling pipe 2, the sealing assembly further includes a first seal 4 and a second seal 5. The first seal 4 is arranged between the filling pipe 2 and the side plate 32, and the first seal 4 is sleeved on the outer peripheral wall of the filling pipe 2 and abuts against the outer peripheral edge of the liquid inlet end. The second seal 5 is sleeved on the outer peripheral wall of the filling pipe 2, and the second seal 5 abuts against the filling pipe 2 and the side plate 32.

[0035] It should be noted that the structures of the first seal 4 and the second seal 5 are exactly the same. The first seal 4 is an auxiliary seal and the second seal 5 is a main seal. Since the sealing and wear positions of the first seal 4 and the second seal 5 are different, the two can be interchanged and continue to be used, which can improve the environmental protection level of commercial vehicles, reduce the cost of use, and achieve reliable and stable operation of the post-processing system. At the same time, in order to distinguish the two and facilitate subsequent maintenance, the appearance of the first seal 4 and the second seal 5 can be different colors. Specifically, the appearance of the first seal 4 is blue and the appearance of the second seal 5 is black.

[0036] In this embodiment, the outer wall of the filler pipe 2 defines a first retaining groove and a second retaining groove. The first seal 4 is inserted into the first retaining groove, and the second seal 5 is inserted into the second retaining groove. This arrangement provides a clear installation space, which limits the axial movement of the first and second seals 4, 5, respectively, preventing them from twisting or flipping, and preventing them from slipping during assembly or vibration. This reduces dynamic friction and wear between them and their mating components, thereby extending the service life of the first and second seals 4, 5.

[0037] Optionally, to achieve 360-degree full-circumferential sealing, the first seal 4 and the second seal 5 are both annular. The annular structure can evenly distribute the pressing force, avoiding leakage caused by local stress concentration, and is particularly suitable for dynamic or vibrating environments, such as bumps in vehicle driving.

[0038] Specifically, this embodiment exemplarily provides the following technical solution: the first sealing member 4 and the second sealing member 5 are spaced apart along the length direction of the filling pipe 2 , and the first sealing member 4 is closer to the liquid inlet end than the second sealing member 5 .

[0039] Optionally, in order to be able to deform slightly to fill in slightly uneven surfaces, adapt to manufacturing tolerances or long-term wear, and achieve adaptive compensation, the first sealing member 4 and the second sealing member 5 are both made of rubber material.

[0040] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pressure vessel for a commercial vehicle exhaust after-treatment system, characterized in that: include: A storage tank (1), wherein the storage tank (1) is provided with a receiving cavity, and the receiving cavity is used to store urea solution; A filling pipe (2), wherein the storage tank (1) is provided with a filling port communicating with the accommodating cavity, and the filling pipe (2) has two ends along its length direction, namely a liquid inlet end and a liquid outlet end, the liquid outlet end being sealed and plugged into the filling port, and the urea solution can enter the accommodating cavity via the liquid inlet end and the liquid outlet end in sequence; A sealing assembly, comprising a sealing cover (3), the sealing cover (3) comprising a cover plate (31), and a side plate (32) circumferentially connected to the cover plate (31), the sealing cover (3) being detachably covered and arranged on the liquid inlet end, the side plate (32) being in contact with the outer peripheral wall of the filling pipe (2), and the cover plate (31) being arranged on the liquid inlet end.

2. The pressure vessel of the commercial vehicle exhaust after-treatment system according to claim 1, characterized in that: The sealing assembly further comprises a first sealing member (4), the first sealing member (4) being arranged between the filling pipe (2) and the side plate (32), and the first sealing member (4) being sleeved on the outer peripheral wall of the filling pipe (2) and abutting against the outer peripheral edge of the liquid inlet end.

3. The pressure vessel of the commercial vehicle exhaust after-treatment system according to claim 2, characterized in that: The outer side wall of the filling pipe (2) is provided with a first clamping groove, and the first sealing member (4) is embedded in the first clamping groove.

4. The pressure vessel of the commercial vehicle exhaust after-treatment system according to claim 2, characterized in that: The first sealing member (4) is in an annular shape.

5. The pressure vessel of the commercial vehicle exhaust after-treatment system according to claim 2, characterized in that: The first sealing member (4) is made of rubber material.

6. The pressure vessel of the commercial vehicle exhaust after-treatment system according to claim 2, characterized in that: The sealing assembly further comprises a second sealing member (5), the second sealing member (5) being sleeved on the outer peripheral wall of the filling pipe (2), and the second sealing member (5) being in contact with and fitted between the filling pipe (2) and the side plate (32).

7. The pressure vessel of the commercial vehicle exhaust after-treatment system according to claim 6, characterized in that: The first sealing member (4) and the second sealing member (5) are spaced apart along the length direction of the filling pipe (2), and the first sealing member (4) is closer to the liquid inlet end than the second sealing member (5).

8. The pressure vessel of the commercial vehicle exhaust after-treatment system according to claim 6, characterized in that: A second groove is provided on the outer side wall of the filling pipe (2), and the second sealing member (5) is embedded in the second groove.

9. The pressure vessel of the commercial vehicle exhaust after-treatment system according to claim 6, characterized in that: The second sealing member (5) is in an annular shape.

10. The pressure vessel of the commercial vehicle exhaust after-treatment system according to claim 6, characterized in that: The second sealing member (5) is made of rubber material.

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