Low-temperature-resistant urea pipe

Abstract

The utility model belongs to the technical field of urea pipes, and particularly relates to a low-temperature-resistant urea pipe which comprises a pipe body. The corrugated pipe is arranged on the outer side of the pipe body; the pipe joints are arranged at the two ends of the pipe body, and the pipe body and the corrugated pipe are fixed together through the pipe joints; wherein a heat preservation cavity is formed between the pipe body and the corrugated pipe; according to the combined urea pipe structure, a heat preservation cavity is formed in the combined urea pipe structure, heat preservation is conducted on the pipe body, and then low-temperature-resistant protection is conducted on the pipe body.

Description

Technical Field

[0001] The utility model belongs to the technical field of urea pipes, and in particular relates to a low-temperature resistant urea pipe. Background Art

[0002] At present, as the country's requirements for environmental protection are getting higher and higher, commercial vehicles are mainly reflected in the requirements for automobile emission regulations. At present, Euro IV emissions have been mandatory, and the more stringent Euro V emission standards will be implemented within 3 years. In order to achieve the above emission requirements, domestic and foreign diesel vehicles currently generally use SCR (Selective Catalyst Reduction) technology for emission post-treatment. Urea aqueous solution is used as a reducing agent and injected into the diesel engine exhaust. Under the action of exhaust gas temperature and airflow, urea releases ammonia (NH3) through thermal decomposition and hydrolysis reactions, and under a certain temperature and catalyst, NOx is reduced to nitrogen (N2) and water (H2O) to achieve the purpose of reducing NOx emissions. This leads to the urea pipe being insulated during use so that it can work normally under low temperature conditions. Therefore, we specially designed a low-temperature resistant urea pipe. Utility Model Content

[0003] The purpose of the utility model is to provide a low-temperature resistant urea pipe to achieve the effect of low-temperature protection in view of the above-mentioned technical problems.

[0004] In view of this, the utility model provides a low-temperature resistant urea pipe, comprising:

[0005] tube body;

[0006] A bellows, which is arranged outside the tube body;

[0007] Pipe joints, which are arranged at both ends of the pipe body and fix the pipe body and the corrugated pipe together;

[0008] Wherein, a heat preservation cavity is formed between the tube body and the corrugated tube.

[0009] In the above technical solution, further, the pipe joint includes:

[0010] An inner joint, wherein an embedding groove is arranged on one end surface of the inner joint, both ends of the corrugated pipe extend into the embedding groove, and the pipe body is connected to the inner side of the inner joint;

[0011] An external joint, which is arranged outside the internal joint and has a connecting end;

[0012] The inner joint and the outer joint are fixed by threaded connection.

[0013] In the above technical solution, further, it also includes:

[0014] The extended edges are arranged at both ends of the tube body and extend between the inner joint and the outer joint.

[0015] In the above technical solution, further, it also includes:

[0016] A clamp, which is arranged on a section of the bellows port outside the inner joint;

[0017] A protruding end is arranged on the inner side of the inner joint, and the bellows is pressed against the protruding end.

[0018] In the above technical solution, further, it also includes:

[0019] A sealing ring, the sealing ring comprising a first sealing ring and a second sealing ring;

[0020] Wherein, the first sealing ring and the second sealing ring are respectively attached to the wall surfaces on both sides of the extended edge.

[0021] In the above technical solution, further, it also includes:

[0022] A probe port is arranged at one end of the corrugated pipe and is connected with a plug;

[0023] Wherein, an antifreeze medium is arranged in the heat preservation cavity.

[0024] In the above technical solution, further, it also includes:

[0025] The skirt is arranged on the first sealing ring and extends outside the connecting surface of the inner joint and the outer joint.

[0026] The beneficial effects of the utility model are as follows: the combined urea pipe structure forms a heat preservation cavity inside, thereby isolating the pipe body and protecting the pipe body from low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of the utility model;

[0028] Figure 2 It is a structural schematic diagram of the utility model;

[0029] The markings in the figure are as follows: 1. pipe body; 2. bellows; 3. pipe joint; 31. inner joint; 311. groove; 312. protruding end; 32. outer joint; 321. connector; 4. extended edge; 5. clamp; 61. first sealing ring; 62. second sealing ring; 7. probe port; 8. plug; 9. skirt. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0031] Embodiment 1:

[0032] This embodiment provides a low-temperature resistant urea tube, including:

[0033] tube body 1;

[0034] A bellows 2, which is arranged outside the tube body 1;

[0035] Pipe joints 3 are arranged at both ends of the pipe body 1 and fix the pipe body 1 and the corrugated pipe 2 together;

[0036] A heat preservation cavity is formed between the tube body 1 and the corrugated tube 2 .

[0037] It can be seen from this embodiment that a low-temperature resistant urea pipe includes a pipe body 1, a corrugated pipe 2 and a pipe joint 3;

[0038] A bellows 2 is arranged outside the pipe body 1, and a heat preservation cavity is formed between the pipe body 1 and the bellows 2. The heat preservation cavity can insulate the pipe body 1, thereby protecting the pipe body 1 from low temperature damage. The bellows 2 and the pipe body 1 are fixed together by matching with the pipe joint 3, thereby facilitating connection and assembly.

[0039] The combined urea tube structure forms a heat preservation cavity inside, thereby isolating the tube body 1 and protecting the tube body 1 from low temperature.

[0040] Embodiment 2:

[0041] This embodiment provides a low-temperature resistant urea tube, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0042] The pipe joint 3 comprises:

[0043] An inner joint 31, an embedding groove 311 is provided on one end surface of the inner joint 31, both ends of the corrugated tube 2 extend into the embedding groove 311, and the tube body 1 is connected to the inner side of the inner joint 31;

[0044] An external joint 32, which is disposed outside the internal joint 31 and has a connection end;

[0045] The inner joint 31 and the outer joint 32 are fixed by threaded connection.

[0046] It can be seen from this embodiment that the pipe joint 3 includes an inner joint 31 and an outer joint 32;

[0047] A groove 311 is formed at one end of the inner joint 31, and the groove 311 is fixedly engaged with both ends of the corrugated tube 2, and glue is coated on the engaging surface for reinforcement. The tube body 1 is connected to the inner side of the inner joint 31 and is fixed when the inner joint 31 is connected to the outer joint 32.

[0048] Embodiment 3:

[0049] This embodiment provides a low-temperature resistant urea tube, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0050] The extended edge 4 is arranged at both ends of the tube body 1 and extends between the inner joint 31 and the outer joint 32 .

[0051] It can be seen from this embodiment that the extended edges 4 are formed at both ends of the tube body 1 and extend to the mating surface between the inner joint 31 and the outer joint 32 , and the extended edges 4 are fixed when mating with the inner joint 31 and the outer joint 32 .

[0052] Embodiment 4:

[0053] This embodiment provides a low-temperature resistant urea tube, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0054] A clamp 5, which is arranged on a section of the end of the bellows 2 outside the inner joint 31;

[0055] A protruding end 312 is provided on the inner side of the inner joint 31 , and the bellows 2 is pressed against the protruding end 312 .

[0056] It can be seen from this embodiment that a protruding end 312 is formed on the inner side of the inner joint 31 , and the clamp 5 is connected to both ends of the bellows 2 and presses the bellows 2 against the protruding end 312 , thereby making the connection between the bellows 2 and the pipe joint 3 stable.

[0057] Embodiment 5:

[0058] This embodiment provides a low-temperature resistant urea tube, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0059] A sealing ring, the sealing ring comprises a first sealing ring 61 and a second sealing ring 62;

[0060] The first sealing ring 61 and the second sealing ring 62 are respectively attached to the wall surfaces on both sides of the extended edge 4 .

[0061] It can be seen from this embodiment that the sealing ring includes a first sealing ring 61 and a second sealing ring 62. The first sealing ring 61 and the second sealing ring 62 cooperate to seal the connecting surfaces of the inner joint 31 and the outer joint 32 on both sides of the extended edge 4, thereby playing a role in leak prevention.

[0062] Embodiment 6:

[0063] This embodiment provides a low-temperature resistant urea tube, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0064] A probe port 7 is provided at one end of the corrugated tube 2, and a plug 8 is connected to the probe port 7;

[0065] Wherein, an antifreeze medium is arranged in the heat preservation cavity.

[0066] It can be seen from this embodiment that the probe port 7 is formed at one end of the corrugated tube 2, and a plug 8 is connected to the probe port 7. When in use, the antifreeze medium can be filled into the insulation cavity to provide thermal insulation protection for the tube body 1.

[0067] Embodiment 7:

[0068] This embodiment provides a low-temperature resistant urea tube, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0069] The skirt 9 is arranged on the first sealing ring 61 and extends outside the connection surface between the inner joint 31 and the outer joint 32 .

[0070] It can be seen from this embodiment that the skirt 9 is provided on the first sealing ring 61 to further enhance the sealing effect and improve the anti-leakage capability.

[0071] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A low temperature resistant urea pipe, characterized in that it comprises: tube body(1); A bellows (2), wherein the bellows (2) is arranged outside the tube body (1); Pipe joints (3), the pipe joints (3) being arranged at both ends of the pipe body (1) and fixing the pipe body (1) and the corrugated pipe (2) together; Wherein, a heat-insulating cavity is formed between the tube body (1) and the corrugated tube (2).

2. A low temperature resistant urea pipe according to claim 1, characterized in that: The pipe joint (3) comprises: An inner joint (31), wherein an embedding groove (311) is provided on one end surface of the inner joint (31), both ends of the corrugated tube (2) extend into the embedding groove (311), and the tube body (1) is connected to the inner side of the inner joint (31); An external joint (32), wherein the external joint (32) is arranged outside the internal joint (31), and a connection end is arranged on the external joint (32); Wherein, the inner joint (31) and the outer joint (32) are fixed by being threadedly connected.

3. A low temperature resistant urea pipe according to claim 2, characterized in that include: The extended edge (4) is arranged at both ends of the tube body (1) and extends between the inner joint (31) and the outer joint (32).

4. A low temperature resistant urea pipe according to claim 3, characterized in that include: A clamp (5), wherein the clamp (5) is arranged on a section of the end of the bellows (2) outside the inner joint (31); Wherein, a protruding end (312) is provided on the inner side of the inner joint (31), and the bellows (2) is pressed against the protruding end (312).

5. A low temperature resistant urea pipe according to claim 4, characterized in that include: A sealing ring, wherein the sealing ring comprises a first sealing ring (61) and a second sealing ring (62); Wherein, the first sealing ring (61) and the second sealing ring (62) are respectively attached to the wall surfaces on both sides of the extended edge (4).

6. A low temperature resistant urea pipe according to claim 5, characterized in that include: A probe port (7), wherein the probe port (7) is arranged at one end of the corrugated tube (2), and a plug (8) is connected to the probe port (7); Wherein, an antifreeze medium is arranged in the heat preservation cavity.

7. A low temperature resistant urea pipe according to claim 6, characterized in that include: A skirt (9), wherein the skirt (9) is arranged on the first sealing ring (61) and extends outside the connection surface between the inner joint (31) and the outer joint (32).

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