Multi-layer composite type high-performance anti-corrosion pipeline

Abstract

The invention discloses a multi-layer composite type high-performance anti-corrosion pipeline, and relates to the field of anti-corrosion pipelines, the multi-layer composite type high-performance anti-corrosion pipeline comprises an anti-corrosion pipeline body, the anti-corrosion pipeline body is provided with at least two layers of lining pipeline bodies from outside to inside, and a filling medium is injected between the lining pipeline body on the outermost layer and the inner wall of the anti-corrosion pipeline body. The grouting opening is formed in the outer wall of the pipeline base body, the filling medium is injected between the inner wall of the pipeline base body and the outer-layer anti-corrosion pipeline, and the outer-layer anti-corrosion pipeline is compressed and can be tightly attached to the inner-layer anti-corrosion pipeline, so that a gap is effectively prevented from being generated between the inner-layer anti-corrosion pipeline and the outer-layer anti-corrosion pipeline; therefore, corrosive media are prevented from flowing into the space between the inner-layer anti-corrosion pipeline and the outer-layer anti-corrosion pipeline, mutual crosstalk of conveying media with different properties can be effectively avoided when the conveying media are replaced, and meanwhile the outer-layer anti-corrosion pipeline can be better protected.

Description

Technical Field

[0001] The present invention relates to the field of anti-corrosion pipelines, and specifically to a multi-layer composite high-performance anti-corrosion pipeline. Background Art

[0002] An anti-corrosion pipeline is a pipeline that has undergone special treatment to prevent or slow down corrosion caused by internal and external media, thereby extending its service life and ensuring transportation safety. It is mainly applied in fields such as petroleum, natural gas, chemical industry, water supply, and electricity to avoid leaks, pollution, and safety incidents caused by corrosion.

[0003] Lining an anti-corrosion layer inside the matrix pipeline is a widely used technology, especially suitable for corrosive industries such as the chemical and petroleum industries. In the prior art, a common solution is to fit a polytetrafluoroethylene anti-corrosion inner layer on the inner wall of the matrix pipeline. In some prior arts, in order to further enhance the anti-corrosion performance of the pipeline, a layer of glass or ceramic is further provided inside the polytetrafluoroethylene pipeline.

[0004] Regarding the above-mentioned related technologies, when the anti-corrosion pipelines in the prior art are used in the chemical field, they often need to transport different types of corrosive media as the production plan changes. The glass layer or ceramic layer, as the lining of polytetrafluoroethylene, is prone to gaps between them in actual use. The corrosive media inside the pipeline are likely to flow into the gap between the two through the pipeline interface during transportation. When the corrosive media to be transported needs to be changed, the pipeline needs to be cleaned to avoid cross-interference between two different corrosive media. The corrosive media that enter the anti-corrosion pipeline sandwich are likely to corrode the polytetrafluoroethylene layer after staying in the sandwich for a long time. To sum up, when the existing multi-layer anti-corrosion pipelines transport corrosive media, the corrosive media are likely to flow into the sandwich of the multi-layer anti-corrosion pipelines. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a multi-layer composite high-performance anti-corrosion pipeline to solve the technical problem that corrosive media are likely to flow into the sandwich of the multi-layer anti-corrosion pipeline.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A multi-layer composite high-performance anti-corrosion pipeline, including an anti-corrosion pipeline. The anti-corrosion pipeline is provided with at least two layers of lining pipelines from outside to inside, and a filling medium is injected between the outermost lining pipeline and the inner wall of the anti-corrosion pipeline.

[0007] By adopting the above technical solution, a grouting port is arranged on the outer wall of the pipeline matrix, and a filling medium is injected between the inner wall of the pipeline matrix and the outer anti-corrosion pipeline, compressing the outer anti-corrosion pipeline so that it can closely adhere to the inner anti-corrosion pipeline, effectively avoiding the generation of gaps between the inner anti-corrosion pipeline and the outer anti-corrosion pipeline, thereby preventing corrosive media from flowing into the gap between the inner anti-corrosion pipeline and the outer anti-corrosion pipeline. When replacing the conveying medium, it can effectively avoid the mutual interference of different types of conveying media, and at the same time can better protect the outer anti-corrosion pipeline.

[0008] The present invention is further configured such that the anti-corrosion pipeline includes a straight pipe, and a first outer layer pipe and a first inner layer pipe are sequentially arranged inside the straight pipe from outside to inside. The side walls at both ends of the straight pipe are respectively connected with a grouting port and a slurry discharge port that communicate with the space formed between the straight pipe and the first outer layer pipe.

[0009] Preferably, grout is injected through the grouting port into the space formed between the inner wall of the straight pipe and the first outer layer pipe, squeezing the first outer layer pipe to make it fully fit with the first inner layer pipe, and avoiding the appearance of gaps between the two.

[0010] The present invention is further configured such that the anti-corrosion pipeline includes a main pipe and a branch pipe. A second outer layer pipe and a second inner layer pipe are sequentially arranged inside the main pipe from outside to inside. A third outer layer pipe and a third inner layer pipe are sequentially arranged inside the branch pipe from outside to inside. The side wall at the end of the main pipe is connected with a grouting port that communicates with the space formed between the main pipe and the second outer layer pipe. The side wall at one end of the branch pipe far from the main pipe is connected with a slurry discharge port that communicates with the space formed between the branch pipe and the third outer layer pipe.

[0011] Preferably, grout is injected through the grouting port into the space formed between the inner wall of the three-way pipe and the outermost pipe, squeezing the outermost pipe to avoid the appearance of gaps between it and the inner pipe.

[0012] The present invention is further configured such that a flanging ring is welded to the end of the first outer layer pipe. The end face of the flanging ring is in contact with the end face of the straight pipe. An anti-corrosion ring is attached to the side of the flanging ring away from the straight pipe. Both ends of the first inner layer pipe protrude from the ring face of the flanging ring and are inserted into the anti-corrosion ring. A protective ring is attached to the side of the anti-corrosion ring away from the flanging ring. The inner circle of the protective ring extends centripetally and wraps the anti-corrosion ring. The material of the protective ring is the same as that of the first inner layer pipe.

[0013] Preferably, the anti-corrosion ring is in close contact with the first inner layer pipe, which can effectively prevent the conveying medium from seeping into the gap between the first inner layer pipe and the first outer layer pipe along the pipe interface.

[0014] The present invention is further configured such that an extrusion ring is attached to the side of the protective ring away from the anti-corrosion ring. The end face of the extrusion ring protrudes from the end face of the straight pipe.

[0015] Preferably, when the two sections of pipelines are connected to each other, the extrusion ring can extrude the anti-corrosion structure at the end face of the anti-corrosion pipeline, effectively avoiding the phenomenon of liquid leakage in the anti-corrosion pipeline.

[0016] The present invention is further configured such that the inner diameter of the extrusion ring is smaller than that of the protection ring, and the inner diameter of the protection ring is smaller than that of the first inner layer pipe.

[0017] Preferably, the flowing medium in the anti-corrosion pipeline cannot directly wash the extrusion ring and the anti-corrosion ring, prolonging the service life of the extrusion ring and the anti-corrosion ring.

[0018] The present invention is further configured such that the second inner layer pipe is provided with a through port in the direction towards the third inner layer pipe, the second outer layer pipe is also provided with a through port in the direction towards the third outer layer pipe, and the second outer layer pipe and the third outer layer pipe are connected to each other by welding.

[0019] Preferably, the conveying media between the main pipe and the branch pipe can flow through each other.

[0020] The present invention is further configured such that a second flange is provided at the end of the third inner layer pipe close to the second inner layer pipe in a centripetal manner, a first flange is provided at the position of the second inner layer pipe corresponding to the second flange, and a filling layer is provided between the first flange and the second flange.

[0021] Preferably, the first flange and the second flange can effectively prevent the conveying medium in the tee pipeline from directly flushing the joint of the second inner layer pipe and the third inner layer pipe, and further effectively prevent the conveying medium from infiltrating into the interlayer space through the joint of the second inner layer pipe and the third inner layer pipe.

[0022] The present invention is further configured such that the position filled with the welding flux for welding the second outer layer pipe and the third outer layer pipe is located between the third outer layer pipe and the third inner layer pipe.

[0023] Preferably, after the welding flux expands due to heat, the thickness at the connection of the second outer layer pipe and the third outer layer pipe can be ensured.

[0024] The present invention is further configured such that a clamping ring groove for clamping the anti-corrosion ring is provided at a position of the protection ring close to the center, and a plugging ring groove for inserting the first inner layer pipe is provided at the direction of the anti-corrosion ring towards the first inner layer pipe.

[0025] Preferably, before installing the protection ring, the anti-corrosion ring can be directly sleeved in the clamping ring groove, which is convenient for the production of the anti-corrosion pipeline.

[0026] In summary, the present invention mainly has the following beneficial effects:

[0027] 1. The present invention injects a filling medium between the inner wall of the pipeline matrix and the outer anti-corrosion pipeline by setting a grouting port on the outer wall of the pipeline matrix, compresses the outer anti-corrosion pipeline, enabling it to closely adhere to the inner anti-corrosion pipeline, effectively avoiding the generation of gaps between the inner anti-corrosion pipeline and the outer anti-corrosion pipeline, thereby preventing corrosive media from flowing into the gap between the inner anti-corrosion pipeline and the outer anti-corrosion pipeline. When replacing the conveying medium, it can effectively prevent the mutual crosstalk of different types of conveying media, and at the same time can better protect the outer anti-corrosion pipeline.

[0028] 2. The present invention welds a flanging ring to the end of the outer anti-corrosion pipeline at the interface of the anti-corrosion pipeline, makes the inner anti-corrosion pipeline protrude from the ring surface of the flanging ring and insert into the anti-corrosion ring, and wraps the anti-corrosion ring with a protective ring made of the same material as the inner anti-corrosion pipeline, so that the corrosive media flowing in both directions in the anti-corrosion pipeline cannot directly impact the anti-corrosion ring or the outer anti-corrosion pipeline, effectively extending the service life of the outer anti-corrosion pipeline, and thus extending the overall service life of the anti-corrosion pipeline. At the same time, it can effectively prevent the corrosive conveying medium from penetrating between the inner anti-corrosion pipeline and the outer anti-corrosion pipeline through the pipeline interface.

[0029] 3. The present invention sets a pressing ring at the port of the anti-corrosion pipeline, making the pressing ring protrude from the end face of the pipeline matrix. When two anti-corrosion pipelines are connected oppositely, they can radially fully press the protective ring and the anti-corrosion ring, further ensuring the sealing performance at the interface of the anti-corrosion pipeline, preventing corrosive media from penetrating into the interlayer of the pipeline. At the same time, the inner diameter of the pressing ring is smaller than that of the protective ring, avoiding the direct scouring of the pressing ring by the corrosive media flowing in both directions, and effectively extending the service life of the pressing ring.

[0030] 4. The present invention sets a flange at the end of the inner anti-corrosion pipeline corresponding to the branch pipe of the three-way anti-corrosion pipeline, and sets another flange on the inner anti-corrosion pipeline corresponding to the main pipe in the direction towards the branch pipe. An anti-corrosion layer composed of anti-corrosion materials is filled between the two flanges. The corrosive conveying media in the three-way pipeline will not directly scour the joint of the inner pipeline during the two-way conveying process. At the same time, the filling layer is in close contact with the joints of the two inner pipelines in the three-way pipeline, further preventing the corrosive conveying media from entering the gap between the inner pipeline and the outer pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a three-dimensional view of the present invention in the state of a straight pipeline;

[0032] Figure 2 is a side view of the present invention in the state of a straight pipeline;

[0033] Figure 3 is a three-dimensional view of the present invention in the state of a three-way pipeline;

[0034] Figure 4 is a three-dimensional view of the present invention in the state of a three-way pipeline from another perspective;

[0035] Figure 5 This is the front view of the straight pipe cross-section for the straight-through pipe state of the present invention;

[0036] Figure 6 This is the front view of the main pipe and branch pipe cross-sections for the tee pipe state of the present invention;

[0037] Figure 7 This is the front view of the cross-section for the straight-through pipe state of the present invention;

[0038] Figure 8 For the present invention Figure 7 Enlarged view of A therein;

[0039] Figure 9 This is the front view of the cross-section for the tee pipe state of the present invention;

[0040] Figure 10 For the present invention Figure 9 Enlarged view of B therein;

[0041] Figure 11 This is the exploded view of the cross-section for the straight-through pipe state of the present invention;

[0042] Figure 12 For the present invention Figure 11 Enlarged view of C therein;

[0043] Figure 13 This is the three-dimensional view of the cross-section state of the tee pipe state of the present invention along the axial and circumferential directions simultaneously;

[0044] Figure 14 For the present invention Figure 13 Enlarged view of D therein;

[0045] Figure 15 This is the front view of the cross-section state of another embodiment of the tee pipe state of the present invention;

[0046] Figure 16 For the present invention Figure 15 Enlarged view of E therein.

[0047] Explanation of reference numerals:

[0048] 1, straight pipe; 2, main pipe; 3, branch pipe; 4, grouting port; 5, slurry discharge port; 6, first outer layer pipe; 601, recessed platform; 7, first welding layer; 8, flanging ring; 9, first inner layer pipe; 10, anti-corrosion ring; 1001, insertion ring groove; 11, protection ring; 1101, clamping ring groove; 12, extrusion ring; 13, second outer layer pipe; 14, third outer layer pipe; 15, second welding layer; 16, second inner layer pipe; 1601, first flange; 17, third inner layer pipe; 1701, second flange; 18, filling layer. Detailed implementation manners

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0050] The embodiments of the present invention will be described below according to the overall structure of the present invention.

[0051] The first embodiment:

[0052] A multi-layer composite high-performance anti-corrosion pipeline, please refer to Figure 1-2 、 Figure 5 、 Figure 7-8 、 Figure 11-12 , including an anti-corrosion pipeline. The anti-corrosion pipeline can specifically be a straight pipeline, a reducing pipeline, a tee pipeline, etc. In this embodiment, the anti-corrosion pipeline is specifically a straight pipe 1. The anti-corrosion pipeline is provided with at least two inner lining pipelines from the outside to the inside. A filling medium is injected between the innermost inner lining pipeline and the inner wall of the anti-corrosion pipeline. Specifically, in this embodiment, the filling medium is specifically sulfoaluminate cement, and the expansion rate of the sulfoaluminate cement is 0.05-0.5%. In this embodiment, sulfoaluminate cement with an expansion rate of 0.5% is specifically used.

[0053] In the above embodiment, specifically referring to Figure 7-8 , the anti-corrosion pipeline includes a straight pipe 1. Inside the straight pipe 1, a first outer layer pipe 6 and a first inner layer pipe 9 are sequentially arranged from the outside to the inside. Grouting ports 4 and slurry discharge ports 5 that connect the space formed between the straight pipe 1 and the first outer layer pipe 6 are respectively connected to the side walls at both ends of the straight pipe 1. Specifically, the grouting ports 4 and the slurry discharge ports 5 are arranged at an interval of 180 degrees along the circumferential surface. Through the grouting port 4, grout is injected into the space formed between the inner wall of the straight pipe 1 and the first outer layer pipe 6, and the first outer layer pipe 6 is extruded to make it fully fit with the first inner layer pipe 9, avoiding gaps between the two.

[0054] Specifically, when performing the grouting work, it is necessary to make the ports of the anti-corrosion pipeline in a connected state to ensure the sealing performance at the ports. The sulfoaluminate cement is injected through the grouting port 4, and the excess sulfoaluminate cement is discharged through the slurry discharge port 5. During the grouting process, the pressure is kept not exceeding the limit pressure that the inner lining of the anti-corrosion pipeline can withstand. Select an appropriate grouting time according to the diameter of the anti-corrosion pipeline to ensure that the sulfoaluminate cement fills the required filling area and avoid the occurrence of hollowing phenomena.

[0055] In the above embodiment, specifically referring to Figure 7-8 、 Figure 11-12, at the end of the first outer layer pipe 6, a flanging ring 8 is welded. The end face of the flanging ring 8 is in contact with the end face of the straight pipe 1. On the side of the flanging ring 8 away from the straight pipe 1, an anti-corrosion ring 10 is attached. Both ends of the first inner layer pipe 9 protrude from the ring surface of the flanging ring 8 and are inserted into the anti-corrosion ring 10. On the side of the anti-corrosion ring 10 away from the flanging ring 8, a protective ring 11 is attached. The inner ring of the protective ring 11 extends centripetally and wraps the anti-corrosion ring 10. The material of the protective ring 11 is the same as that of the first inner layer pipe 9. The anti-corrosion ring 10 is in close contact with the first inner layer pipe 9, which can effectively prevent the conveyed medium from seeping into the gap between the first inner layer pipe 9 and the first outer layer pipe 6 along the pipe interface.

[0056] Furthermore, on the side of the protective ring 11 away from the anti-corrosion ring 10, a pressing ring 12 is attached. The end face of the pressing ring 12 protrudes from the end face of the straight pipe 1. When the two pipes are connected to each other, the pressing ring 12 can press the anti-corrosion structure at the end face of the anti-corrosion pipe, effectively preventing the phenomenon of liquid leakage in the anti-corrosion pipe. The inner diameter of the pressing ring 12 is smaller than that of the protective ring 11, and the inner diameter of the protective ring 11 is smaller than that of the first inner layer pipe 9, so that the flowing medium in the anti-corrosion pipe cannot directly scour the pressing ring 12 and the anti-corrosion ring 10, extending the service life of the pressing ring 12 and the anti-corrosion ring 10.

[0057] Specifically, at both ends of the first outer layer pipe 6, recessed platforms 601 are provided. When welding the first outer layer pipe 6 and the flanging ring 8, the welding flux is filled into the recessed platforms 601, and the whole anti-corrosion pipe is sent into a baking room to be heated. After the welding flux melts, a first welding layer 7 is formed between the first outer layer pipe 6 and the flanging ring 8. Specifically, the welding flux is soluble polytetrafluoroethylene dust. The materials of the first outer layer pipe 6, the flanging ring 8, the anti-corrosion ring 10, and the pressing ring 12 are all polytetrafluoroethylene, while the materials of the first inner layer pipe 9 and the protective ring 11 are both glass.

[0058] In the above embodiment, specifically, please refer to Figure 7-8 、 Figure 11-12 , at the position of the protective ring 11 close to the center, a clamping ring groove 1101 for clamping the anti-corrosion ring 10 is provided. The anti-corrosion ring 10 is provided with an insertion ring groove 1001 for the first inner layer pipe 9 to insert in the direction towards the first inner layer pipe 9. Before installing the protective ring 11, the anti-corrosion ring 10 can be directly sleeved in the clamping ring groove 1101, which is convenient for the production of the anti-corrosion pipe.

[0059] The second embodiment:

[0060] A multi-layer composite high-performance anti-corrosion pipe, please refer to Figure 1-14, based on the first embodiment, the difference from the first embodiment is that the anti-corrosion pipeline is a tee pipe in this embodiment. The anti-corrosion pipeline of the tee includes a main pipe 2 and a branch pipe 3. The anti-corrosion structure and principle at the port of the tee pipeline in this embodiment are the same as those in the first embodiment, and will not be elaborated here. Inside the main pipe 2, a second outer layer pipe 13 and a second inner layer pipe 16 are sequentially arranged from outside to inside. Inside the branch pipe 3, a third outer layer pipe 14 and a third inner layer pipe 17 are sequentially arranged from outside to inside. A grouting port 4 connecting the space formed between the main pipe 2 and the second outer layer pipe 13 is connected to the side wall of the end of the main pipe 2. A slurry discharge port 5 connecting the space formed between the branch pipe 3 and the third outer layer pipe 14 is connected to the side wall of one end of the branch pipe 3 far from the main pipe 2. Grout is injected through the grouting port 4 into the space formed between the inner wall of the tee pipeline and the outermost pipeline, squeezing the outermost pipeline to prevent gaps from appearing between it and the inner pipeline.

[0061] Specifically, in this embodiment, there are two grouting ports 4 in total, and both are located at the position of the main pipe 2 far from the branch pipe 3. There are two slurry discharge ports 5 in total in this embodiment, which are arranged at intervals of 180 degrees circumferentially at the end of the branch pipe 3, and both are located at positions far from the port of the main pipe 2. The medium and principle of grouting in this embodiment are the same as those in the first embodiment, and will not be elaborated here.

[0062] In the above embodiment, specifically, please refer to Figure 9-10 , Figure 13-14 , a through port is arranged in the direction of the second inner layer pipe 16 towards the third inner layer pipe 17, and a through port is also arranged in the direction of the second outer layer pipe 13 towards the third outer layer pipe 14. The second outer layer pipe 13 and the third outer layer pipe 14 are connected to each other by welding, so that the conveying media between the main pipe 2 and the branch pipe 3 can flow through each other.

[0063] Furthermore, the position where the welding flux for welding the second outer layer pipe 13 and the third outer layer pipe 14 is filled is between the third outer layer pipe 14 and the third inner layer pipe 17. The whole anti-corrosion pipeline is sent into a baking room to be heated. After the welding melts, a second welding layer 15 connecting the second outer layer pipe 13 and the third outer layer pipe 14 is formed between the third outer layer pipeline and the third inner layer pipeline 17. After the welding flux expands due to heat, the thickness at the connection of the second outer layer pipe 13 and the third outer layer pipe 14 can be guaranteed.

[0064] In the above embodiment, specifically, please refer to Figure 7-10 , Figure 13-14, at one end of the third inner layer pipe 17 close to the second inner layer pipe 16, a second flange 1701 is arranged centripetally. At the position of the first flange 1601 corresponding to the second flange 1701 on the second inner layer pipe 16, a first flange 1601 is arranged. A filling layer 18 is arranged between the first flange 1601 and the second flange 1701. Specifically, when connecting the end faces of the anti-corrosion pipes, the two opposite extrusion rings 12 can be mutually extruded to make the third inner layer pipe 17 press the filling layer 18 tightly against the first flange 16 in the direction towards the second inner layer pipe 16. The first flange 1601 and the second flange 1701 can effectively prevent the conveyed medium in the tee pipe from directly scouring the joint of the second inner layer pipe 16 and the third inner layer pipe 17, extend the service life of the filling layer 18, and further effectively prevent the conveyed medium from infiltrating into the interlayer space through the joint of the second inner layer pipe 16 and the third inner layer pipe 17, thereby improving the anti-corrosion performance of the anti-corrosion pipe.

[0065] Specifically, in this embodiment, the welding flux is soluble polytetrafluoroethylene dust, and the materials of the second outer layer pipe 13, the third outer layer pipe 14, and the filling layer 18 are all polytetrafluoroethylene, and the materials of the second inner layer pipe 16 and the third inner layer pipe 17 are both glass.

[0066] The third embodiment:

[0067] A multi-layer composite high-performance anti-corrosion pipe, please refer to Figure 15-16 , on the basis of the second embodiment, the difference from the second embodiment is that the inner diameter of the third inner layer pipe 17 is the same as the opening diameter of the second inner layer pipe 16. The third inner layer pipe 17 made of glass and the second inner layer pipe 16 can play a role in protecting the second outer layer pipe 13 and the third outer layer pipe 14 made of polytetrafluoroethylene.

[0068] When the anti-corrosion pipe of the present invention specifically conveys corrosive media:

[0069] When the corrosive medium flowing through the straight pipe 1 passes through the interface of the straight pipe 1, it will directly scour the protection ring 11. Under the action of the protection ring 11, the corrosion degree of the anti-corrosion ring 10 and the extrusion ring 12 by the corrosive medium is relatively weak, and the extrusion ring 12 in close contact with the end of the opposite anti-corrosion pipe can extrude the anti-corrosion ring 10 to make the anti-corrosion ring 10 in close contact with the first inner layer pipe 9, effectively preventing the corrosive conveyed medium from entering the gap between the first inner layer pipe 9 and the first outer layer pipe 6. While extending the service life of the first outer layer pipe 6, it is also convenient to replace the conveyed medium of the anti-corrosion pipe. Under the pressure outside the first outer layer pipe 6, the first outer layer pipe 6 will closely adhere to the first inner layer pipe 9, further preventing the corrosive conveyed medium from entering the gap between the first inner layer pipe 9 and the first outer layer pipe 6;

[0070] The structure and anti-corrosion measures of the corrosive medium flowing through the main pipe 2 and the branch pipe 3 at the pipe end interface are the same as those of the straight pipe 1. Since it is inconvenient to weld the second inner layer pipe 16 and the third inner layer pipe 17 inside the pipe, the flange structure provided at the joint between the two can effectively prevent the corrosive medium from directly scouring the filling layer 18, and the filling layer 18 is pressed between the flange structures, thereby effectively preventing the corrosive conveying medium in the anti-corrosion pipe from entering the gap through the gap between the second inner layer pipe 16 and the third inner layer pipe 17. While extending the service life of the second outer layer pipe 13 and the third outer layer pipe 14, it is also convenient to replace the conveying medium of the anti-corrosion pipe. Similarly, under the pressure outside the second outer layer pipe 13 and the third outer layer pipe 14, the second outer layer pipe 13 and the third outer layer pipe 14 will closely adhere to the second inner layer pipe 16 and the third inner layer pipe 17, further preventing the corrosive conveying medium from entering the inner and outer layer gaps of the anti-corrosion pipe.

[0071] Although the embodiments of the present invention have been shown and described, the specific embodiments are only explanations of the present invention and not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations that do not contribute creatively to the embodiments according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A multi-layer composite high-performance anti-corrosion pipeline, characterized in that Comprising: An anti-corrosion pipeline, wherein at least two layers of lining pipelines are arranged from outside to inside in the anti-corrosion pipeline, and a filling medium is injected between the innermost lining pipeline and the inner wall of the anti-corrosion pipeline.

2. The multi-layer composite high-performance anti-corrosion pipeline according to claim 1, wherein: The anti-corrosion pipeline includes a straight pipe (1), wherein a first outer layer pipe (6) and a first inner layer pipe (9) are sequentially arranged from outside to inside in the straight pipe (1), and a grouting port (4) and a slurry discharging port (5) for communicating the space formed between the straight pipe (1) and the first outer layer pipe (6) are respectively connected to the side walls at both ends of the straight pipe (1).

3. The multi-layer composite high-performance anti-corrosion pipeline according to claim 1, wherein: The anti-corrosion pipeline includes a main pipe (2) and a branch pipe (3), wherein a second outer layer pipe (13) and a second inner layer pipe (16) are sequentially arranged from outside to inside in the main pipe (2), a third outer layer pipe (14) and a third inner layer pipe (17) are sequentially arranged from outside to inside in the branch pipe (3), a grouting port (4) for communicating the space formed between the main pipe (2) and the second outer layer pipe (13) is connected to the side wall at the end of the main pipe (2), and a slurry discharging port (5) for communicating the space formed between the branch pipe (3) and the third outer layer pipe (14) is connected to the side wall at one end of the branch pipe (3) far from the main pipe (2).

4. The multi-layer composite high-performance anti-corrosion pipeline according to claim 2, characterized in that: A flanging ring (8) is welded to the end of the first outer layer pipe (6), the end face of the flanging ring (8) is in contact with the end face of the straight pipe (1), an anti-corrosion ring (10) is attached to the side of the flanging ring (8) away from the straight pipe (1), both ends of the first inner layer pipe (9) protrude from the ring surface of the flanging ring (8) and are inserted into the anti-corrosion ring (10), a protection ring (11) is attached to the side of the anti-corrosion ring (10) away from the flanging ring (8), the inner ring of the protection ring (11) extends centripetally and wraps the anti-corrosion ring (10), and the material of the protection ring (11) is the same as that of the first inner layer pipe (9).

5. The multi-layer composite high-performance anti-corrosion pipeline according to claim 4, characterized in that: An extrusion ring (12) is attached to the side of the protection ring (11) away from the anti-corrosion ring (10), and the end face of the extrusion ring (12) protrudes from the end face of the straight pipe (1).

6. The multi-layer composite high-performance anti-corrosion pipeline according to claim 5, wherein: The inner diameter of the extrusion ring (12) is smaller than that of the protection ring (11), and the inner diameter of the protection ring (11) is smaller than that of the first inner layer pipe (9).

7. The multi-layer composite high-performance anti-corrosion pipeline according to claim 3, characterized in that: A through hole is arranged in the second inner layer pipe (16) in the direction towards the third inner layer pipe (17), a through hole is also arranged in the second outer layer pipe (13) in the direction towards the third outer layer pipe (14), and the second outer layer pipe (13) and the third outer layer pipe (14) are connected to each other by welding.

8. The multi-layer composite high-performance anti-corrosion pipeline according to claim 7, characterized in that: The inner diameter of the third inner layer pipe (17) is consistent with the opening diameter of the through hole in the second inner layer pipe (16). There is no flange here. 17 should be located above 13, and the inner diameter of 17 is consistent with the opening diameters of 13 and 16.

9. The multi-layer composite high-performance anti-corrosion pipeline according to claim 7, wherein: The position where the welding flux for welding the second outer layer pipe (13) and the third outer layer pipe (14) is filled is located between the third outer layer pipe (14) and the third inner layer pipe (17).

10. The multi-layer composite high-performance anti-corrosion pipeline according to claim 4, characterized in that: A clamping ring groove (1101) for clamping the anti-corrosion ring (10) is arranged at a position close to the center of the protection ring (11), and a plugging ring groove (1001) for inserting the first inner layer pipe (9) is arranged in the anti-corrosion ring (10) in the direction towards the first inner layer pipe (9).

Images