Novel pipeline anti-corrosion connector structure

Abstract

The utility model discloses a novel pipeline anti-corrosion interface structure which comprises a first pipe body, a second pipe body and a lining pipe, the first pipe body is sleeved at one end of the lining pipe, the second pipe body is sleeved at the other end of the lining pipe, the first pipe body and the second pipe body are connected through a butt weld, and an annular cavity is arranged in the lining pipe along the circumferential direction. Two first annular grooves are formed in the outer walls of the two ends of the lining pipe in the circumferential direction, an annular sealing ring is arranged in each first annular groove, a plurality of discharging ports are formed in the middle of the side wall of the lining pipe in the circumferential direction, a first feeding port is formed in one side of each discharging port, and a first exhaust port is formed in the other side of each discharging port. A second exhaust port is formed in the side wall, right opposite to the first exhaust port, of the first pipe body, a first sealing plug is arranged at the outer end of the second exhaust port, a second feeding port communicated with the first feeding port is formed in the side wall of the second pipe body, and a second sealing plug is arranged at the outer end of the second feeding port. The anti-corrosion connector is good in anti-corrosion effect, high in connector strength, long in service life and good in safety.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe anti-corrosion, in particular to a novel pipeline anti-corrosion interface structure. Background Art

[0002] At present, during the operation of long-distance pipelines, due to the presence of various corrosive substances in the conveying medium, rust occurs in the pipeline, which in turn causes perforation and leakage accidents, resulting in production stoppage, environmental pollution and other problems. With the continuous improvement of production technology, the inner wall of the water pipeline body is made of solvent-free epoxy paint or fused epoxy powder, and after anti-corrosion treatment by a robotic arm or automatic spraying device, the corrosion rate of the pipe is effectively reduced and the service life is increased. However, after the construction and welding of small-diameter pipes is completed, due to the small construction space, personnel cannot enter the inner wall of the pipeline for anti-corrosion treatment, and there is a quality risk of untreated anti-corrosion at the welded pipe end. With the corrosion of the conveying medium, pipes whose inner walls are not anti-corrosion are most likely to leak, resulting in a reduction in the service life of the pipe. Utility Model Content

[0003] The utility model provides a novel pipeline anti-corrosion interface structure, which solves the problem that the interior of traditional small-diameter pipelines is difficult to be anti-corroded, resulting in a short service life of the pipeline and easy leakage of the pipeline interface.

[0004] The utility model provides a novel pipeline anti-corrosion interface structure, comprising a first tube body, a second tube body, and an inner liner. The first tube body is sleeved on one end of the inner liner, and the second tube body is sleeved on the other end of the inner liner. The first tube body and the second tube body are connected by a butt weld. An annular cavity is arranged inside the inner liner along the circumferential direction. Two first annular grooves are arranged on the outer walls at both ends of the inner liner along the circumferential direction. An annular sealing ring is arranged in each first annular groove. A plurality of discharge ports are arranged on the middle part of the side wall of the inner liner along the circumferential direction. A first feed port is arranged on one side of the discharge port, and a first exhaust port is arranged on the other side. A second exhaust port is arranged on the side wall of the first tube body opposite to the first exhaust port, a first sealing plug is arranged at the outer end of the second exhaust port, a second feed port connected to the first feed port is arranged on the side wall of the second tube body, and a second sealing plug is arranged at the outer end of the second feed port.

[0005] In the above technical solution, further, each of the discharge ports is evenly distributed on the butt welds of the first tube body and the second tube body.

[0006] In the above technical solution, further, the material of the liner pipe is stainless steel.

[0007] In the above technical solution, further, an annular sealing plate is sleeved on the outside of the interface between the first tube body and the second tube body, a second annular groove is arranged on the inner wall of the annular sealing plate along the circumferential direction, an annular sealing film is arranged in the second annular groove along the circumferential direction, two ends of the annular sealing film are respectively sealed and connected to the side walls of the first tube body and the second tube body, a plurality of pressure sensors are arranged on the bottom of the second annular groove along the circumferential direction, and the middle part of the annular sealing film protrudes outward and contacts each pressure sensor.

[0008] In the above technical solution, further, two support rings are symmetrically arranged at both ends of the liner pipe.

[0009] In the above technical solution, further, a first positioning ring is sleeved on the outer wall of the first tube body, and the first positioning ring is provided with a plurality of first positioning holes along the circumferential direction; a second positioning ring is sleeved on the outer wall of the second tube body, and the second positioning ring is provided with a plurality of second positioning holes corresponding to the first positioning holes along the circumferential direction; positioning screws are passed through the first positioning holes and the second positioning holes, and the first positioning ring and the second positioning ring are fixedly connected to the positioning screws by adjusting nuts respectively.

[0010] It can be seen from the above technical solutions that the utility model provides a new pipeline anti-corrosion interface structure.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. Add anti-corrosion coating slurry into the annular cavity inside the inner liner through the second feed port, and discharge the anti-corrosion coating slurry onto the butt weld through multiple discharge ports to perform anti-corrosion treatment on the surface of the butt weld. Pressurize the annular cavity through the second feed port, and detect the sealing of the butt weld with the anti-corrosion coating slurry, so as to achieve anti-corrosion treatment of the weld inside the pipeline interface, with good anti-corrosion effect and low operating difficulty, which can increase the service life of the pipeline interface, have good anti-leakage effect, and facilitate the detection of the sealing of the weld.

[0013] 2. The two support rings can effectively increase the strength of both sides of the butt weld between the first pipe body and the second pipe body to prevent the butt weld from being damaged by concentrated force during ground subsidence. The first pipe body and the second pipe body can be rigidly connected by the positioning screw to increase the interface connection strength between the first pipe body and the second pipe body.

[0014] 3. The leaked liquid is received by the annular sealing film, and the leaked liquid is detected by the pressure sensor and the signal is transmitted to the terminal controller to realize the early warning of the pipeline interface leakage information. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the utility model, the following is a brief introduction to the drawings required for use in the implementation cases. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 This is a schematic diagram of the overall structure of a new type of pipeline anti-corrosion interface structure proposed by the utility model;

[0017] Figure 2 This is a partial structural schematic diagram of a new type of pipeline anti-corrosion interface structure proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the installation position structure of an annular sealing film of a new type of pipeline anti-corrosion interface structure proposed by the utility model.

[0019] In the figure:

[0020] 1-first tube body; 10-butt weld;

[0021] 2-Second tube body;

[0022] 3- liner tube; 30- support ring; 31- annular cavity; 32- first annular groove; 33- discharge port; 34- first feed port; 35- first exhaust port; 36- second exhaust port; 37- first sealing plug; 38- second feed port; 39- second sealing plug; 321- annular sealing ring;

[0023] 4- annular sealing plate; 41- second annular groove;

[0024] 5- annular sealing film;

[0025] 6- Pressure sensor;

[0026] 7-first positioning ring; 71-first positioning hole;

[0027] 8-second positioning ring; 81-second positioning hole;

[0028] 9- Positioning screw. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] Embodiment 1:

[0031] See also Figure 1-3A novel pipeline anti-corrosion interface structure comprises a first pipe body 1, a second pipe body 2, and an inner liner 3. The first pipe body 1 is sleeved on one end of the inner liner 3, and the second pipe body 2 is sleeved on the other end of the inner liner 3. The first pipe body 1 and the second pipe body 2 are connected by a butt weld 10. An annular cavity 31 is arranged inside the inner liner 3 along the circumferential direction. Two first annular grooves 32 are arranged on the outer walls of both ends of the inner liner 3 along the circumferential direction. An annular sealing ring 321 is arranged in each first annular groove 32. A plurality of discharge ports 33 are arranged in the middle of the side wall of the inner liner 3 along the circumferential direction. A first feed port 34 is arranged on one side of the discharge port 33, and a first exhaust port 35 is arranged on the other side. A second exhaust port 36 is arranged on the side wall of the first pipe body 1 opposite to the first exhaust port 35. A first sealing plug 37 is arranged at the outer end of the second exhaust port 36. A sealing plug 37 is arranged on the side wall of the second pipe body 2 to be connected to the first feed port A second feed port 38 is connected to the feed port 34, and a second sealing plug 39 is arranged at the outer end of the second feed port 38. Anti-corrosion coating slurry is added into the annular cavity 31 inside the inner liner pipe 3 through the second feed port 38, and the anti-corrosion coating slurry is discharged onto the butt weld 10 through multiple discharge ports 33, so that the surface of the butt weld 10 is subjected to anti-corrosion treatment. During the process of the anti-corrosion coating slurry entering the annular cavity 31, the gas in the annular cavity 31 is discharged through the first exhaust port 35 and the second exhaust port 36, and the second exhaust port 36 can also be sealed by the first sealing plug 37, and then the annular cavity 31 is pressurized through the second feed port 38. By detecting the sealing performance of the butt weld 10 with the anti-corrosion coating slurry, the anti-corrosion treatment of the weld inside the pipeline interface can be achieved, the anti-corrosion effect is good, the operation difficulty is low, and the sealing performance of the weld can be detected at the same time.

[0032] In this embodiment, see Figure 1 The discharge ports 33 are evenly distributed on the butt weld 10 of the first pipe body 1 and the second pipe body 2, so that the anti-corrosion coating slurry in the annular cavity 31 can flow out evenly through the discharge ports 33 to coat the internal welds of the pipe interface, thereby ensuring that the internal welds at the pipe interface can be completely anti-corrosion treated.

[0033] In this embodiment, the material of the inner lining pipe 3 is stainless steel, the thickness of the inner lining stainless steel is ≥1.2mm, and the width is ≥150mm. The construction is carried out by using stainless steel as the base and ordinary carbon steel for filling and covering. No patching operation is required after construction. The inner lining pipe 3 made of stainless steel can prevent the corrosive liquid inside the pipeline from directly contacting the pipeline weld and accelerating the corrosion rate of the weld, forming the first layer of protection for the weld, and effectively increasing the service life of the pipeline.

[0034] In this embodiment, see Figure 2 , 3An annular sealing plate 4 is sleeved on the outside of the interface between the first tube body 1 and the second tube body 2, and a second annular groove 41 is arranged on the inner wall of the annular sealing plate 4 along the circumferential direction, and an annular sealing film 5 is arranged in the second annular groove 41 along the circumferential direction. The two ends of the annular sealing film 5 are respectively squeezed on the outer walls of the first tube body 1 and the second tube body side wall 2 through the annular sealing plate 4 to seal and connect, and a plurality of pressure sensors 6 are arranged on the bottom of the second annular groove 41 along the circumferential direction. The middle part of the annular sealing film 5 protrudes outward and can elastically resist each pressure sensor 6. When the pipeline weld interface leaks, the leaked liquid enters the annular sealing film 5. As the accumulated liquid inside increases, the annular sealing film 5 is squeezed into the second annular groove 41 arranged on the inner wall of the annular sealing plate 4 along the circumferential direction, forming an extrusion force on the plurality of pressure sensors 6 arranged on the bottom of the second annular groove 41 along the circumferential direction. The pressure sensor 6 detects the pressure and transmits a signal to the terminal controller to realize an early warning of the leakage information.

[0035] In this embodiment, see Figure 1 Two support rings 30 are symmetrically arranged at both ends of the inner liner pipe 3. The cross-section of each support ring 30 is a right triangle. The function of the support ring 30 is to make the liquid in the pipeline flow to the inner liner pipe 3 along the internal inclined surface of the support ring 30 to prevent direct impact on the end face of the inner liner pipe 3. At the same time, the two support rings 30 can effectively increase the strength of both sides of the butt weld 10 between the first pipe body 1 and the second pipe body 2, thereby preventing the butt weld 10 from being damaged by concentrated force during ground subsidence.

[0036] In this embodiment, see Figure 3 A first positioning ring 7 is sleeved on the outer wall of the first tube body 1, and a plurality of first positioning holes 71 are arranged on the first positioning ring 7 along the circumferential direction. A second positioning ring 8 is sleeved on the outer wall of the second tube body 2, and a plurality of second positioning holes 81 corresponding to the first positioning holes 71 are arranged on the second positioning ring 8 along the circumferential direction. Positioning screws 9 are passed through the first positioning holes 71 and the second positioning holes 81. The first positioning ring 7 and the second positioning ring 8 are fixedly connected to the positioning screws 9 through adjusting nuts respectively. The first tube body 1 and the second tube body 2 can be rigidly connected through the positioning screws 9, thereby increasing the interface connection strength between the first tube body 1 and the second tube body 2.

[0037] It can be seen from the above technical solution that when in use, the anti-corrosion coating slurry is added to the annular cavity 31 inside the inner liner 3 through the second feed port 38, and the anti-corrosion coating slurry is discharged to the butt weld 10 through multiple discharge ports 33, and the surface of the butt weld 10 is treated with anti-corrosion. During the process of the anti-corrosion coating slurry entering the annular cavity 31, the gas in the annular cavity 31 is discharged through the first exhaust port 35 and the second exhaust port 36, and the second exhaust port 36 can also be sealed by the first sealing plug 37, and then the annular cavity is filled with the anti-corrosion coating slurry through the second feed port 38. 31 is pressurized, and the sealing of the butt weld 10 is detected by anti-corrosion coating slurry. When the pipeline weld interface leaks, the leaked liquid enters the annular sealing film 5. As the internal accumulated liquid increases, the annular sealing film 5 is squeezed into the second annular groove 41 arranged along the circumferential direction of the inner wall of the annular sealing plate 4, forming an extrusion force on the bottom of the second annular groove 41 along the circumferential direction. The pressure sensor 6 detects the pressure and transmits a signal to the terminal controller to realize an early warning of the leakage information.

[0038] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the utility model disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and examples are to be regarded as exemplary only, and the true scope of the present invention is indicated by the claims.

[0039] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention.

Claims

1. A new type of pipeline anti-corrosion interface structure, characterized by: The invention comprises a first tube body (1), a second tube body (2), and an inner liner tube (3); the first tube body (1) is sleeved on one end of the inner liner tube (3); the second tube body (2) is sleeved on the other end of the inner liner tube (3); the first tube body (1) and the second tube body (2) are connected by a butt weld (10); an annular cavity (31) is arranged inside the inner liner tube (3) along the circumferential direction; two first annular grooves (32) are arranged on the outer walls of both ends of the inner liner tube (3) along the circumferential direction; an annular sealing ring (321) is arranged in each first annular groove (32); and the inner liner tube (3) is provided with a plurality of sealing rings (321). A plurality of discharge ports (33) are arranged in the middle of the side wall of the tube (3) along the circumferential direction, a first feed port (34) is arranged on one side of the discharge port (33), and a first exhaust port (35) is arranged on the other side, a second exhaust port (36) is arranged on the side wall of the first tube body (1) directly opposite to the first exhaust port (35), a first sealing plug (37) is arranged at the outer end of the second exhaust port (36), a second feed port (38) connected to the first feed port (34) is arranged on the side wall of the second tube body (2), and a second sealing plug (39) is arranged at the outer end of the second feed port (38).

2. A novel pipeline anti-corrosion interface structure according to claim 1, characterized in that: The discharge openings (33) are evenly distributed on the butt welds (10) of the first tube body (1) and the second tube body (2).

3. A novel pipeline anti-corrosion interface structure according to claim 1, characterized in that: The material of the inner lining tube (3) is stainless steel.

4. The novel pipeline anti-corrosion interface structure according to claim 1 is characterized in that: An annular sealing plate (4) is sleeved on the outside of the interface between the first tube body (1) and the second tube body (2); a second annular groove (41) is arranged on the inner wall of the annular sealing plate (4) along the circumferential direction; an annular sealing film (5) is arranged in the second annular groove (41) along the circumferential direction; two ends of the annular sealing film (5) are respectively sealed with the side walls of the first tube body (1) and the second tube body (2); a plurality of pressure sensors (6) are arranged on the bottom of the second annular groove (41) along the circumferential direction; a middle portion of the annular sealing film (5) protrudes outward and contacts each of the pressure sensors (6).

5. The novel pipeline anti-corrosion interface structure according to claim 1 is characterized in that: Two support rings (30) are symmetrically arranged at both ends of the inner liner tube (3).

6. The novel pipeline anti-corrosion interface structure according to claim 1 is characterized in that: A first positioning ring (7) is sleeved on the outer wall of the first tube body (1), and a plurality of first positioning holes (71) are arranged on the first positioning ring (7) along a circumferential direction; a second positioning ring (8) is sleeved on the outer wall of the second tube body (2), and a plurality of second positioning holes (81) corresponding to the first positioning holes (71) are arranged on the second positioning ring (8) along a circumferential direction; positioning screws (9) are inserted into the first positioning holes (71) and the second positioning holes (81); and the first positioning ring (7) and the second positioning ring (8) are fixedly connected to the positioning screws (9) respectively through adjusting nuts.

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