Corrosion-resistant urea pipe

Abstract

The utility model belongs to the technical field of urea pipes, and particularly relates to a corrosion-resistant urea pipe which comprises a pipe body, the pipe body is used for conveying urea solution, a double-wall corrugated pipe arranged on the outer wall of the pipe body is formed by combining an outer corrugated pipe and an inner corrugated pipe and is high in pressure resistance, the outer wall of the double-wall corrugated pipe is of an annular corrugated structure, the ring stiffness of the pipe is greatly enhanced, and the service life of the pipe is prolonged. The outer corrugated pipe enhances the external protection of the pipe body and reduces the corrosion of the external environment to the pipe body, and the inner corrugated pipe enhances the internal support, so that compared with a single corrugated pipe used by a common urea pipeline, the urea pipeline has more obvious advantages, and the corrosion-resistant layer is fixedly arranged on the inner wall of the pipe body, so that the service life of the urea pipeline is prolonged. The anti-corrosion layer is formed by coating the inner wall of the pipe body with an anti-corrosion coating material, the coating material has good adhesive force and corrosion resistance and can be kept stable in a urea solution, the corrosion resistance of the pipe body is enhanced, the connector assembly is installed at one end of the pipe body, and the disassembly and assembly efficiency of the pipeline connector is improved.

Description

Technical Field

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

[0002] The urea pipe is a component used for automobile exhaust treatment. Urea solution is a reducing agent for nitrogen oxides in diesel engine exhaust emissions. The urea solution flows through the urea pipe and enters the next component to react chemically with nitrogen oxides in the exhaust gas to achieve an environmental protection effect.

[0003] In the prior art, the body of the urea pipe is usually directly inserted into the joint, and then fixed at the liquid inlet. Under high pressure conditions, the sealing of the connection between the body of the urea pipe and the joint will be reduced, and the body of the urea pipe may even be separated from the joint. When the urea pipe needs to be replaced, it is inconvenient. In addition, the corrosion resistance of the urea pipe is insufficient, and after being used for a long time, it is easy to leak and other problems. Utility Model Content

[0004] The purpose of the utility model is to provide a corrosion-resistant urea pipe in view of the above-mentioned technical problems, so as to solve the problems raised in the above-mentioned background technology.

[0005] In view of this, the utility model provides a corrosion-resistant urea pipe, comprising a pipe body, one end of which is equipped with a joint assembly;

[0006] Double-wall corrugated pipe, the outer wall of the pipe body is provided with a double-wall corrugated pipe;

[0007] An outer bellows, the outer wall of the double-wall bellows is provided with an outer bellows, and the outer bellows is fixedly connected to the outer wall of the double-wall bellows;

[0008] Inner bellows, the inner wall of the double-wall bellows is provided with an inner bellows, and the inner bellows is fixedly connected to the inner wall of the double-wall bellows;

[0009] The corrosion-resistant layer is fixedly provided on the inner wall of the pipe body.

[0010] In the above technical solution, further, the joint assembly includes:

[0011] A spring boss is formed on one end surface of the tube body;

[0012] Compression spring, the outer end surface of the spring boss is fixedly connected with a plurality of compression springs;

[0013] A joint flange, one end of the compression spring away from the spring boss is fixedly connected with the joint flange;

[0014] The expansion pipe has a joint flange at the inner end fixedly connected with the expansion pipe, and the expansion pipe is sleeved in the pipe body.

[0015] In the above technical solution, further, a sleeve groove is provided on the outer side of the inner end surface of the telescopic tube, the sleeve groove is concave, a sealing sleeve is sleeved in the sleeve groove, and the outer circle of the sealing sleeve corresponds to the inner circle of the tube body.

[0016] In the above technical solution, further, an interface groove is provided on the inner ring of the joint flange, the interface groove is annular, and an interface gasket is fixedly connected to the end face, and the inner ring of the interface gasket corresponds to the inner ring of the telescopic tube.

[0017] In the above technical solution, further, the inner end surface of the spring boss is fixedly connected with a tube body washer, and the inner ring of the tube body washer corresponds to the outer tube of the telescopic tube.

[0018] In the above technical solution, further, six compression springs are provided and are evenly distributed on the outer end surface of the spring boss. A flange hole is provided on the end surface of the joint flange. There are six flange holes, which are respectively opened between the two compression springs on the joint flange.

[0019] In the above technical solution, further, the sealing sleeve is made of rubber material.

[0020] The beneficial effects of the utility model are:

[0021] 1. A corrosion-resistant layer is fixedly arranged on the inner wall of the pipe body. The corrosion-resistant layer is formed by coating the inner wall of the pipe body with an anti-corrosion coating material. The coating material has good adhesion and corrosion resistance, can remain stable in urea solution, and enhances the corrosion resistance of the pipe body.

[0022] 2. Through the coordinated use of the compression spring and the joint flange, the pipeline connection joint can be pre-fixed. At the same time, when disassembling, the fixing of the connection flange can be unlocked to compress the compression spring, so that the telescopic tube can be pushed into the pipe body and directly removed, thereby improving the efficiency of disassembly of the urea pipe connection joint.

[0023] 3. The sleeve groove and the sealing sleeve are provided to ensure the sealing property of the telescopic tube at the end interface, and also to ensure that the sealing sleeve can be stably fixed in the sleeve groove to prevent leakage and ensure the safety of the joint assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0026] Figure 3 This utility model Figure 2 A partial enlarged view of the middle A;

[0027] The markings in the figure are: 1-tube body, 2-double-walled corrugated pipe, 3-outer bellows, 4-inner bellows, 5-corrosion-resistant layer, 6-spring boss, 7-compression spring, 8-joint flange, 9-telescopic tube, 10-sleeve groove, 11-sealing sleeve, 12-interface groove, 13-interface gasket, 14-tube body gasket, 15-flange hole. DETAILED DESCRIPTION

[0028] 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.

[0029] Embodiment 1:

[0030] This embodiment provides a corrosion-resistant urea pipe, including:

[0031] A pipe body 1, with a joint assembly installed at one end of the pipe body 1;

[0032] Double-wall corrugated pipe 2, the outer wall of the pipe body 1 is provided with a double-wall corrugated pipe 2;

[0033] An outer bellows 3 is provided on the outer wall of the double-wall bellows 2, and the outer bellows 3 is fixedly connected to the outer wall of the double-wall bellows 2;

[0034] Inner bellows 4: The inner wall of the double-walled bellows 2 is provided with an inner bellows 4, and the inner bellows 4 is fixedly connected to the inner wall of the double-walled bellows 2;

[0035] Corrosion-resistant layer 5: The inner wall of the tube body 1 is fixedly provided with a corrosion-resistant layer 5.

[0036] It can be seen from the present embodiment that the pipe body 1 is used for conveying urea solution, and the double-walled corrugated pipe 2 arranged on the outer wall of the pipe body 1 is composed of an outer corrugated pipe 3 and an inner corrugated pipe 4, and has strong pressure resistance. Its outer wall is an annular corrugated structure, which greatly enhances the ring stiffness of the pipe material, thereby enhancing the resistance of the pipe body 1 to external loads. The outer corrugated pipe 3 enhances the external protection of the pipe body 1 and reduces the erosion of the external environment to the pipe body 1. The inner corrugated pipe 4 enhances the internal support, which has obvious advantages over the single corrugated pipe used in general urea pipelines. The inner wall of the pipe body 1 is fixedly provided with a corrosion-resistant layer 5, and the corrosion-resistant layer 5 is formed by coating the inner wall of the pipe body 1 with an anti-corrosion coating material. The coating material has good adhesion and corrosion resistance, can remain stable in the urea solution, and enhances the corrosion resistance of the pipe body 1. A joint assembly is installed at one end of the pipe body 1 to improve the efficiency of connecting and disconnecting the pipeline joints.

[0037] Embodiment 2:

[0038] This embodiment provides a corrosion-resistant urea pipe, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0039] The connector assembly includes:

[0040] A spring boss 6 is stretched on one end surface of the tube body 1;

[0041] Compression spring 7, the outer end surface of the spring boss 6 is fixedly connected with a plurality of compression springs 7;

[0042] A joint flange 8, one end of the compression spring 7 away from the spring boss 6 is fixedly connected to the joint flange 8;

[0043] Telescopic tube 9: The joint flange 8 is fixedly connected with the telescopic tube 9 at the inner end, and the telescopic tube 9 is sleeved in the tube body 1.

[0044] It can be seen from the present embodiment that a mounting flange is provided at the connection port of the connecting pipe body 1, and the joint flange 3 is connected and fixedly connected to the mounting flange. By using the compression spring 7 and the joint flange 3 in coordination, the pre-fixation of the pipeline connecting joint can be achieved. At the same time, when disassembling, the fixing of the connecting flange 3 can be unlocked, and the compression spring 7 can be compressed, so that the telescopic tube 9 can be pushed into the pipe body 1, and it can be directly removed, thereby improving the efficiency of disassembly of the urea pipe pipeline connecting joint.

[0045] Embodiment 3:

[0046] This embodiment provides a corrosion-resistant urea pipe, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0047] The telescopic tube 9 is provided with a sleeve groove 10 on the outer side of the inner end surface. The sleeve groove 10 is concave. A sealing sleeve 11 is sleeved in the sleeve groove 10. The outer circle of the sealing sleeve 11 corresponds to the inner circle of the tube body 1.

[0048] It can be seen from this embodiment that the sleeve groove 10 and the sealing sleeve 11 are provided to ensure the sealing performance of the telescopic tube 9 at the end interface, while also ensuring that the sealing sleeve 11 can be stably fixed in the sleeve groove 10 to prevent leakage and ensure the safety of the joint assembly.

[0049] Embodiment 4:

[0050] This embodiment provides a corrosion-resistant urea pipe, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0051] An interface groove 12 is formed on the inner circle of the joint flange 8 . The interface groove 12 is annular, and an interface gasket 13 is fixedly connected to the end surface. The inner circle of the interface gasket 13 corresponds to the inner circle of the telescopic tube 9 .

[0052] It can be seen from this embodiment that the interface gasket 13 is provided, so that the sealing performance of the connection between the joint assembly and the pipe body 1 is greatly improved, thereby improving the safety.

[0053] Embodiment 5:

[0054] This embodiment provides a corrosion-resistant urea pipe, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0055] The inner end surface of the spring boss 6 is fixedly connected with a tube body washer 14 , and the inner circle of the tube body washer 14 corresponds to the outer tube of the telescopic tube 9 .

[0056] It can be seen from this embodiment that the inner circle of the tube body gasket 14 corresponds to the outer tube of the telescopic tube 9, which ensures the sealing of the tube body 1 and improves the safety of the joint assembly.

[0057] Embodiment 6:

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

[0059] Six compression springs 7 are provided and are evenly distributed on the outer end surface of the spring boss 6. A flange hole 15 is opened on the end surface of the joint flange 8. Six flange holes 15 are provided and are respectively opened between two compression springs 7 on the joint flange 8.

[0060] It can be seen from this embodiment that the stability and sealing of the connection are improved by means of the six flange holes 15 arranged alternately with the six compression springs 7 .

[0061] Embodiment 7:

[0062] This embodiment provides a corrosion-resistant urea pipe, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0063] The sealing sleeve 11 is made of rubber.

[0064] It can be seen from this embodiment that the sealing sleeve 11 is made of rubber material, which has excellent sealing performance.

[0065] 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 corrosion-resistant urea pipe, characterized in that: include: A pipe body (1), wherein a joint assembly is installed at one end of the pipe body (1); A double-wall corrugated pipe (2), wherein the outer wall of the pipe body (1) is provided with the double-wall corrugated pipe (2); An outer bellows (3), wherein the outer wall of the double-walled bellows (2) is provided with the outer bellows (3), and the outer bellows (3) is fixedly connected to the outer wall of the double-walled bellows (2); An inner bellows (4), wherein the inner wall of the double-walled bellows (2) is provided with the inner bellows (4), and the inner bellows (4) is fixedly connected to the inner wall of the double-walled bellows (2); A corrosion-resistant layer (5), wherein the inner wall of the tube body (1) is fixedly provided with a corrosion-resistant layer (5).

2. The corrosion-resistant urea pipe according to claim 1, characterized in that: The joint assembly comprises: A spring boss (6), wherein one end surface of the tube body (1) is stretched with a spring boss (6); Compression spring (7), a plurality of compression springs (7) are fixedly connected to the outer end surface of the spring boss (6); A joint flange (8), one end of the compression spring (7) away from the spring boss (6) being fixedly connected to the joint flange (8); A telescopic tube (9), wherein the joint flange (8) is fixedly connected with the telescopic tube (9) at the inner end, and the telescopic tube (9) is sleeved in the tube body (1).

3. The corrosion-resistant urea pipe according to claim 2, characterized in that: The telescopic tube (9) is provided with a sleeve groove (10) on the outer side of the inner end surface. The sleeve groove (10) is concave. A sealing sleeve (11) is sleeved in the sleeve groove (10). The outer circle of the sealing sleeve (11) corresponds to the inner circle of the tube body (1).

4. The corrosion-resistant urea pipe according to claim 3, characterized in that: The inner circle of the joint flange (8) is provided with an interface groove (12), which is annular, and an interface gasket (13) is fixedly connected to the end surface, and the inner circle of the interface gasket (13) corresponds to the inner circle of the telescopic tube (9).

5. The corrosion-resistant urea pipe according to claim 4, characterized in that: The inner end surface of the spring boss (6) is fixedly connected with a tube body washer (14), and the inner ring of the tube body washer (14) corresponds to the outer tube of the telescopic tube (9).

6. The corrosion-resistant urea pipe according to claim 5, characterized in that: Six compression springs (7) are provided and are evenly distributed on the outer end surface of the spring boss (6). A flange hole (15) is provided on the end surface of the joint flange (8). Six flange holes (15) are provided and are respectively opened between two compression springs (7) on the joint flange (8).

7. The corrosion-resistant urea pipe according to claim 6, characterized in that: The sealing sleeve (11) is made of rubber.

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