Gas-driven urea tank for light-weight automobile

Abstract

The utility model is applicable to the technical field of gas-driven urea tanks, in particular to a gas-driven urea tank for a lightweight automobile, which comprises a urea tank upper-section tank body and a urea tank lower-section tank body, the surface of the urea tank upper-section tank body is provided with a preset filling port, the surface of the urea tank lower-section tank body is provided with a drain outlet, and the drain outlet is communicated with the urea tank upper-section tank body and the urea tank lower-section tank body. A drain outlet sealing plug is arranged in the drain outlet, and the end face of the urea tank upper-section tank body and the end face of the urea tank lower-section tank body are fixedly connected together in a welded mode. According to the stainless steel gas-driven urea tank system, the stainless steel urea tank in the stainless steel gas-driven urea tank system is formed by welding the urea tank upper-section tank body and the urea tank lower-section tank body which are made of thermoplastic plastics; the outer winding layers made of the glass fiber filaments, the carbon fiber filaments or the basalt fiber filaments are evenly wound on the outer side of the urea tank upper section tank body and the outer side of the urea tank lower section tank body, and due to the design, cost and weight are reduced, corrosion resistance is enhanced, and the compression strength of the urea tank is not inferior to that of a stainless steel urea tank.

Description

Technical Field

[0001] The utility model relates to the technical field of air-driven urea tanks, in particular to a lightweight air-driven urea tank for automobiles. Background Art

[0002] Urea tanks for automobiles and diesel engine SCR exhaust after-treatment systems are important components of modern diesel vehicles to reduce exhaust pollution. Urea tanks are mainly used to store urea aqueous solution (commonly known as AdBlue or DEF), which is crucial in the SCR system. Urea tanks are usually made of corrosion-resistant materials and are designed to ensure safe use in various climatic conditions, including antifreeze measures to prevent the solution from freezing at low temperatures.

[0003] The SCR (Selective Catalytic Reduction) system significantly reduces nitrogen oxides (NOx) emitted by diesel engines through chemical reactions. The system uses urea solution as a reducing agent. The solution decomposes at high temperatures to produce ammonia, which reacts with NOx in the SCR catalyst to convert into nitrogen and water vapor. The SCR system includes a urea injection device, a catalyst, a dosage control system and a variety of sensors, which are responsible for monitoring the exhaust gas composition and system status to ensure efficient operation of the system. The entire system not only helps meet strict environmental regulations, but also improves fuel efficiency. With the improvement of environmental protection standards, SCR technology is becoming more and more widely used in diesel vehicles, playing a key role in reducing automobile exhaust emissions.

[0004] There are two main types of SCR post-treatment independent urea supply systems on the market: one system includes a plastic urea tank, a urea sensor and a urea pump; the other uses a stainless steel gas-driven urea tank injection system, eliminating the urea pump. However, both systems have their own shortcomings: the plastic urea tank system is relatively complex and more prone to failure due to the inclusion of dynamic equipment such as a urea pump; and the stainless steel gas-driven urea tank system is more stable, but its cost and weight are relatively high. In this regard, the utility model provides a lightweight gas-driven urea tank for automobiles to solve the above technical problems. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a lightweight gas-driven urea tank for automobiles, aiming to solve the technical problems mentioned in the background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A lightweight gas-driven urea tank for automobiles, comprising an upper tank body of a urea tank and a lower tank body of a urea tank, wherein a preset filling port is arranged on the surface of the upper tank body of the urea tank, a sewage outlet is arranged on the surface of the lower tank body of the urea tank, and a sewage outlet sealing plug is arranged inside the sewage outlet, and the end surfaces of the upper tank body of the urea tank and the lower tank body of the urea tank are fixedly connected together by welding;

[0008] The upper tank body of the urea tank and the lower tank body of the urea tank are both made of thermoplastic plastic material, and the outer sides of the upper tank body of the urea tank and the lower tank body of the urea tank are commonly wound with an outer winding layer;

[0009] A connecting flange assembly is arranged inside the upper tank body of the urea tank, and a mounting flange is detachably connected to the outer side of the connecting flange assembly, and integrated components are arranged on both sides of the mounting flange.

[0010] Furthermore, the thermoplastic plastic material is specifically PE or nylon.

[0011] Furthermore, the outer winding layer is made of glass fiber filaments, carbon fiber filaments or basalt fiber filaments.

[0012] Furthermore, the connecting flange assembly includes:

[0013] The upper tank body of the urea tank is pre-buried with an embedded part, and the surface of the embedded part is fixedly connected with a connecting end;

[0014] An annular fixing groove is provided on the surface of the connecting end, and a preset fixing protruding ring is provided on the surface of the upper tank body of the urea tank, and the preset fixing protruding ring is clamped in the inner part of the annular fixing groove.

[0015] Furthermore, a plurality of anti-rotation holes are provided at equal distances on the surface of the embedded part, and a sealing water line is provided on the surface of the embedded part.

[0016] Furthermore, the connecting end portion and the mounting flange are detachably connected together by means of flange bolt connection, and a second O-ring is provided between the connecting end portion and the mounting flange.

[0017] Furthermore, the preset filling port is pre-embedded with an embedded nut, and the interior of the embedded nut is sealed with a filling port joint via an NPT thread, a fixed thread is provided on the surface of the filling port joint, and the filling port joint is detachably connected to a sealing threaded cover via the fixed thread.

[0018] Furthermore, an annular groove is formed on the surface of the filling port connector, and a first O-ring made of rubber is disposed inside the annular groove.

[0019] Furthermore, a reinforced chassis is provided in an area near the sewage outlet on the surface of the lower tank body of the urea tank, and internal reinforcing ribs are provided inside the lower tank body of the urea tank.

[0020] The utility model provides a lightweight gas-driven urea tank for automobiles, which has the following beneficial effects:

[0021] The stainless steel urea tank in the stainless steel gas-driven urea tank system is welded with the upper tank body and the lower tank body made of thermoplastic plastic, and the outer winding layer made of glass fiber, carbon fiber or basalt fiber is evenly wound on the outer side of the upper tank body and the lower tank body of the urea tank. This design not only reduces the cost and weight, and enhances the corrosion resistance, but also maintains the compressive strength that is not inferior to that of the stainless steel urea tank. Such improvements significantly improve the applicability of lightweight gas-driven urea tanks for automobiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is a schematic diagram of the structure of a lightweight gas-driven urea tank for automobiles.

[0023] Figure 2 The present invention is a structural schematic diagram of an upper tank body of a urea tank and a lower tank body of a urea tank in a lightweight gas-driven urea tank for automobile when they are wound with an outer winding layer.

[0024] Figure 3 The figure is a schematic diagram of the structure of the outer winding layer in a lightweight gas-driven urea tank for automobiles.

[0025] Figure 4 The diagram is a schematic diagram of the top structure of a lightweight gas-driven urea tank for automobiles in a cross-section state.

[0026] Figure 5 The present invention is a schematic diagram of the upward structure of a lightweight gas-driven urea tank for automobiles in a cross-sectional state.

[0027] Figure 6 The present invention is a structural schematic diagram of an upper tank body of a urea tank, a lower tank body of a urea tank and various components mounted on a preset filling port in a lightweight gas-driven urea tank for automobiles.

[0028] Figure 7 The present invention is a structural schematic diagram of a sealed threaded cover, a filling port joint, an embedded nut and a preset filling port in a lightweight gas-driven urea tank for automobiles in a disassembled state.

[0029] Figure 8 The present invention is a structural schematic diagram of a mounting flange and a connecting flange assembly in a lightweight gas-driven urea tank for automobiles in a disassembled state.

[0030] Fig. 9 The present invention is a schematic diagram of the structure of a connecting flange assembly in a lightweight gas-driven urea tank for automobiles.

[0031] In the figure: 1. upper tank body of urea tank; 2. lower tank body of urea tank; 3. sealing threaded cover; 4. preset filling port; 5. integrated assembly; 6. mounting flange; 7. connecting flange assembly; 71. embedded part; 72. connecting end; 73. annular fixing groove; 74. anti-rotation hole; 75. sealing water line; 8. preset fixing raised ring; 9. reinforced chassis; 10. sewage outlet sealing plug; 11. outer winding layer; 12. internal reinforcing ribs; 13. sewage outlet; 14. first O-ring; 15. filling port joint; 16. embedded nut. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0034] like Figure 1-Figure 5 As shown, a lightweight gas-driven urea tank for automobiles provided by an embodiment of the utility model comprises an upper tank body 1 of the urea tank and a lower tank body 2 of the urea tank, and a preset filling port 4 is arranged on the surface of the upper tank body 1 of the urea tank, and urea is filled into the interior of the urea tank through the preset filling port 4. A sewage outlet 13 is provided on the surface of the lower tank body 2 of the urea tank, and a sewage outlet sealing plug 10 is arranged inside the sewage outlet 13, a reinforced chassis 9 is arranged on the surface of the lower tank body 2 of the urea tank near the sewage outlet 13, and an internal reinforcing rib 12 is arranged inside the lower tank body 2 of the urea tank. By arranging the reinforced chassis 9 on the surface of the lower tank body 2 of the urea tank and arranging the internal reinforcing rib 12 inside, the structural strength of the area near the sewage outlet 13 on the lower tank body 2 of the urea tank can be greatly increased, and the stability of the urea tank when used in an internal high-pressure environment can be ensured.

[0035] A connecting flange assembly 7 is provided inside the upper tank body 1 of the urea tank, and a mounting flange 6 is detachably connected to the outer side of the connecting flange assembly 7. An integrated assembly 5 is provided on both sides of the mounting flange 6. The integrated assembly 5 includes multiple components such as a sensor, a heater, a coolant inlet and outlet pipeline, a gas inlet pipeline, and a urea discharge pipeline. It can be understood that the integrated assembly 5 is a common structure in the prior art, so those skilled in the art can use their professional knowledge to make necessary improvements and optimizations thereon.

[0036] There are two main types of SCR post-treatment independent urea supply systems on the market: one system includes a plastic urea tank, a urea sensor and a urea pump; the other uses a stainless steel gas-driven urea tank injection system, eliminating the urea pump. However, both systems have their own shortcomings: the plastic urea tank system is relatively complex and more prone to failure because it contains dynamic equipment such as a urea pump; and the stainless steel gas-driven urea tank system is more stable, but its cost and weight are higher.

[0037] In view of the above market situation, technicians in this field decided to improve the stainless steel gas-driven urea tank system after multiple tests. The goal is to achieve low cost and lightweight benefits by optimizing the design of the stainless steel urea tank.

[0038] The specific improvement methods for the stainless steel urea tank in the stainless steel gas-driven urea tank system are as follows:

[0039] The end faces of the upper tank body 1 of the urea tank and the lower tank body 2 of the urea tank are fixedly connected together by welding, and the upper tank body 1 of the urea tank and the lower tank body 2 of the urea tank are both made of thermoplastic plastic material, and the thermoplastic plastic material is specifically PE or nylon;

[0040] The outer sides of the upper tank body 1 of the urea tank and the lower tank body 2 of the urea tank are wound together with an outer winding layer 11, and the outer winding layer 11 is made of glass fiber yarns, carbon fiber yarns or basalt fiber yarns.

[0041] In one embodiment of the utility model, the urea tank is made of an upper tank body 1 and a lower tank body 2 of a thermoplastic plastic material by welding, so that the overall weight of the urea tank can be reduced to a great extent to achieve the purpose of lightweighting, and because PE or nylon material has excellent corrosion resistance, the urea tank also has excellent corrosion resistance;

[0042] In addition, by winding an outer winding layer 11 made of glass fiber yarn, carbon fiber yarn or basalt fiber yarn on the outer side of the urea tank upper tank body 1 and the urea tank lower tank body 2, the overall structural strength and pressure resistance of the urea tank can be greatly improved.

[0043] In summary, the stainless steel urea tank in the stainless steel gas-driven urea tank system is welded with the urea tank upper tank body 1 and the urea tank lower tank body 2 made of thermoplastic plastic, and the outer winding layer 11 is evenly wound on the outer side of the urea tank upper tank body 1 and the urea tank lower tank body 2. This design not only reduces the cost, reduces the weight, and enhances the corrosion resistance, but also maintains the compressive strength equivalent to that of the stainless steel urea tank. Such improvements significantly improve the applicability of lightweight gas-driven urea tanks for automobiles.

[0044] In this embodiment, when glass fiber filaments, carbon fiber filaments or basalt fiber filaments are wound on the outer side of the upper tank body 1 of the urea tank to obtain the outer winding layer 11, the winding sequence can be: S1, ring winding; S2, small-angle spiral winding; S3, large-angle spiral winding; among which the small-angle winding adopts isopole winding, which is convenient for winding and preventing sand sliding, and ensures beautiful appearance.

[0045] like Figure 6 and Figure 7 As shown, in one embodiment of the utility model, a pre-embedded nut 16 is pre-embedded inside the preset filling port 4, and the inside of the embedded nut 16 is sealed with a filling port connector 15 via an NPT thread, a fixed thread is provided on the surface of the filling port connector 15, and the filling port connector 15 is detachably connected to a sealing threaded cover 3 via the fixed thread, an annular groove is provided on the surface of the filling port connector 15, and a first O-ring 14 made of rubber is provided inside the annular groove.

[0046] In this embodiment, by pre-embedded nut 16 in the preset filling port 4, the filling port connector 15 can be conveniently and firmly connected to the embedded nut 16, and the sealing performance between the filling port connector 15 and the embedded nut 16 can also be ensured;

[0047] By providing the first O-ring 14 made of rubber material, the sealing performance between the sealing threaded cover 3 and the filling port connector 15 can be ensured.

[0048] like Figure 8 and Fig. 9 As shown, in one embodiment of the present utility model, the connecting flange assembly 7 includes:

[0049] An embedded portion 71 is embedded inside the upper tank body 1 of the urea tank, and a connecting end 72 is fixedly connected to the surface of the embedded portion 71. The connecting end 72 is detachably connected to the mounting flange 6 by a flange bolt connection, and a second O-ring is provided between the connecting end 72 and the mounting flange 6;

[0050] An annular fixing groove 73 is formed on the surface of the connecting end portion 72 , and a preset fixing protruding ring 8 is provided on the surface of the upper tank body 1 of the urea tank, and the preset fixing protruding ring 8 is clamped in the inner part of the annular fixing groove 73 .

[0051] A plurality of anti-rotation holes 74 are equidistantly formed on the surface of the embedded portion 71 , and a sealing waterline 75 is provided on the surface of the embedded portion 71 .

[0052] In this embodiment, the embedded portion 71 is embedded in the upper tank body 1 of the urea tank first, and then the fixing protrusion ring 8 is clamped in the annular fixing groove 73, so that the connecting flange assembly 7 can be firmly arranged on the upper tank body 1 of the urea tank as a whole, and the embedded connecting flange assembly 7 can also increase the strength of the end (end) of the upper tank body 1 of the urea tank;

[0053] In addition, a pre-embedded process is adopted, and the embedded part 71 and the connecting end 72 are arranged to have an appearance similar to a T-nut structure, and a sealing water line 75 (self-sealing structure) is arranged on the surface of the embedded part 71. Under the action of internal pressure, the sealing is enhanced, and by setting an anti-rotation hole 74 and cooperating with the anti-rotation plastic block on the preset fixed protrusion ring 8, the embedded part 71 can be prevented from accidentally rotating.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lightweight gas-driven urea tank for automobiles, comprising an upper tank body (1) of the urea tank and a lower tank body (2) of the urea tank, wherein a preset filling port (4) is arranged on the surface of the upper tank body (1) of the urea tank, a sewage outlet (13) is opened on the surface of the lower tank body (2) of the urea tank, and a sewage outlet sealing plug (10) is arranged inside the sewage outlet (13), characterized in that: The end surfaces of the upper tank body (1) of the urea tank and the lower tank body (2) of the urea tank are fixedly connected together by welding; The upper tank body (1) of the urea tank and the lower tank body (2) of the urea tank are both made of thermoplastic plastic material, and the outer sides of the upper tank body (1) of the urea tank and the lower tank body (2) of the urea tank are commonly wound with an outer winding layer (11); A connecting flange assembly (7) is arranged inside the upper tank body (1) of the urea tank, and a mounting flange (6) is detachably connected to the outer side of the connecting flange assembly (7), and an integrated assembly (5) is arranged on both sides of the mounting flange (6).

2. A lightweight gas-driven urea tank for automobiles according to claim 1, characterized in that: The thermoplastic material is specifically PE or nylon.

3. The lightweight gas-driven urea tank for automobile according to claim 1, characterized in that: The outer winding layer (11) is made of glass fiber filaments, carbon fiber filaments or basalt fiber filaments.

4. The lightweight gas-driven urea tank for automobile according to claim 1, characterized in that: The connecting flange assembly (7) comprises: The upper tank body (1) of the urea tank is pre-buried with a pre-buried portion (71), and the surface of the pre-buried portion (71) is fixedly connected with a connecting end portion (72); An annular fixing groove (73) is provided on the surface of the connecting end portion (72), and a preset fixing protruding ring (8) is provided on the surface of the upper tank body (1) of the urea tank, and the preset fixing protruding ring (8) is clamped inside the annular fixing groove (73).

5. A lightweight gas-driven urea tank for automobiles according to claim 4, characterized in that: A plurality of anti-rotation holes (74) are provided at equal distances on the surface of the embedded portion (71), and a sealing waterline (75) is provided on the surface of the embedded portion (71).

6. A lightweight gas-driven urea tank for automobiles according to claim 4, characterized in that: The connecting end portion (72) and the mounting flange (6) are detachably connected together by means of flange bolt connection, and a second O-ring is provided between the connecting end portion (72) and the mounting flange (6).

7. The lightweight gas-driven urea tank for automobile according to claim 1, characterized in that: The preset filling port (4) is pre-embedded with an embedded nut (16), and the interior of the embedded nut (16) is sealedly connected to a filling port connector (15) via an NPT thread; a fixed thread is provided on the surface of the filling port connector (15), and the filling port connector (15) is detachably connected to a sealing threaded cover (3) via the fixed thread.

8. A lightweight gas-driven urea tank for automobiles according to claim 7, characterized in that: An annular groove is formed on the surface of the filling port joint (15), and a first O-type sealing ring (14) made of rubber is arranged inside the annular groove.

9. The lightweight gas-driven urea tank for automobile according to claim 1, characterized in that: A reinforced chassis (9) is provided in an area near the sewage outlet (13) on the surface of the lower tank body (2) of the urea tank, and internal reinforcing ribs (12) are provided inside the lower tank body (2) of the urea tank.

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