Anti-corrosion steel pipe for repairing pipeline lining

Abstract

The utility model relates to the technical field of pipeline repair, and discloses an anti-corrosion steel pipe for pipeline lining repair, which comprises a steel pipe body, one end of the steel pipe body is provided with an embedded groove, the other end of the steel pipe body is fixedly connected with a clamping ring, and the inner wall of the steel pipe body is fixedly provided with a spiral steel bar. The fastening ring is arranged on the steel pipe body, the two ends of the steel pipe body are fixedly connected with a first sealing gasket and a second sealing gasket in a sleeved mode respectively, and the outer wall of the steel pipe body is coated with an anti-corrosion layer. The elastic force of the spring is fully utilized through the additionally-arranged sealing assembly, so that the fastening ring is tightly attached to the first sealing gasket and the second sealing gasket in a pressed mode; the sealing effect of the connecting position of the pipeline is further strengthened, leakage of media can be efficiently prevented, corrosion of the external environment to the pipeline is resisted, the loosening situation is reduced, stable use of the pipeline is ensured, the spiral steel bars are additionally arranged, pressure can be effectively dispersed, and the risk that the steel pipe deforms or cracks due to uneven stress is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipeline repair technology, specifically to an anti-corrosion steel pipe used for pipeline lining repair. Background Technology

[0002] Existing pipe lining repairs typically use PE pipes. PE pipes generally have a wall thickness of more than 3 centimeters, which can cause a significant loss of flow cross-section. Furthermore, they have poor resistance to compression, so there is still a risk of cracking or collapse after repair.

[0003] For example, CN202420245283.5 discloses an anti-corrosion steel pipe for pipeline lining repair, comprising an anti-corrosion steel pipe body, one end of which has an extension end, and the other end of which has a first groove on its inner side to accommodate the extension end. The inner wall of the first groove has a plurality of second grooves, which are spaced apart along the length of the anti-corrosion steel pipe body, and each second groove is embedded with an annular rubber sealing ring. This invention applies anti-corrosion steel pipe to pipeline lining repair, which has better pressure resistance and is more durable than traditional PE pipes. Combined with a Teflon coating, it has excellent corrosion resistance, insulation, wear resistance and moisture resistance.

[0004] The aforementioned patent proposes using a threaded connection to connect two steel pipes. However, in actual use, due to the characteristics of threaded connections, gaps inevitably remain at the joint. Over time, moisture and other media can easily seep in through these gaps, causing corrosion at the pipe joint. Once the pipe joint is corroded, it is very easy for it to loosen, affecting the normal operation and service life of the pipeline system. Furthermore, the steel pipes have poor corrosion resistance and pressure resistance, thus affecting their stable use.

[0005] Therefore, we propose a corrosion-resistant steel pipe for pipeline lining repair to address the aforementioned problems. Utility Model Content

[0006] The purpose of this utility model is to provide an anti-corrosion steel pipe for pipeline lining repair, so as to solve the problem mentioned in the background art that the steel pipe has poor sealing performance and that water vapor and other media can easily seep in through the gaps during long-term use, causing corrosion and affecting stable use.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant steel pipe for pipeline lining repair, comprising a steel pipe body, an inner groove at one end of the steel pipe body, a retaining ring fixedly connected to the other end of the steel pipe body, spiral reinforcing bars fixed to the inner wall of the steel pipe body, a first sealing gasket and a second sealing gasket fixedly sleeved at both ends of the steel pipe body, and an anti-corrosion layer coated on the outer wall of the steel pipe body.

[0008] Also includes:

[0009] A splicing assembly, which facilitates the splicing and installation of two steel pipe bodies;

[0010] A sealing assembly that facilitates a sealed connection between the two steel pipe bodies after installation.

[0011] Preferably, the splicing assembly includes a threaded strip disposed on the inner wall of the embedded groove, the outer wall of the retaining ring is provided with a threaded groove, the threaded groove is threadedly connected to the threaded strip, and the receiving cavity of the embedded groove matches the outer diameter of the retaining ring.

[0012] Preferably, the sealing assembly includes a fixing plate fixed to the outer wall of the steel pipe body, a spring fixedly connected to one end of the fixing plate, and a fastening ring fixedly connected to the other end of the spring.

[0013] Preferably, multiple fixing plates and springs are arranged in a circumferential array.

[0014] Preferably, the inner wall of the fastening ring slides in contact with the outer wall of the second sealing gasket.

[0015] Preferably, the anti-corrosion layer is composed of epoxy resin and hot-dip galvanized material.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. By incorporating splicing components and threaded connections, the robustness of the joint between the two steel pipes is significantly enhanced, effectively preventing loosening. Simultaneously, the added sealing component fully utilizes the spring force to ensure the fastening ring is tightly pressed against the first and second sealing gaskets, further strengthening the sealing effect at the pipe connection. This design effectively prevents media leakage, resists external environmental corrosion, fundamentally reduces the occurrence of loosening, and ensures stable pipeline operation.

[0018] 2. By incorporating spiral reinforcing bars, pressure is effectively dispersed, significantly reducing the risk of deformation or rupture of the steel pipe due to uneven stress, thereby significantly extending the service life of the pipeline. Furthermore, by adding an anti-corrosion layer to the surface of the steel pipe, a tough paint film is formed, strongly preventing external corrosive media from contacting the steel pipe. It can withstand a certain degree of mechanical impact and friction, is not easily damaged, and effectively improves the performance of the steel pipe. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall axial view structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the sealing element and the steel pipe body structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the sealing element and the steel pipe body of this utility model.

[0023] In the figure: 1. Steel pipe body; 2. Embedded groove; 21. Threaded strip; 3. Snap ring; 31. Threaded groove; 4. Spiral reinforcing bar; 5. First sealing washer; 6. Second sealing washer; 61. Fixing plate; 62. Spring; 63. Fastening ring; 7. Anti-corrosion layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figures 1-4A corrosion-resistant steel pipe for pipeline lining repair includes a steel pipe body 1. One end of the steel pipe body 1 has an embedded groove 2, and the other end is fixedly connected to a retaining ring 3. This allows for precise alignment of two steel pipes during splicing and a tight connection through rotation, ensuring the stability and sealing of the pipeline connection. It is suitable for pipeline laying in various terrains and working conditions. The inner wall of the steel pipe body 1 is fixed with spiral reinforcing bars 4, which enhance the structural strength of the steel pipe and improve its compressive and deformation resistance. When the pipeline is buried underground or subjected to external pressure, the spiral reinforcing bars 4 effectively disperse the pressure, reducing the risk of deformation or rupture due to uneven stress and extending the service life of the pipeline. A first sealing gasket 5 and a second sealing gasket 6 are fixedly fitted to both ends of the steel pipe body 1, ensuring the sealing of the pipeline connection and preventing media leakage from the pipe joint. These components work together with the splicing and sealing components to form multiple sealing guarantees.

[0026] The outer wall of the steel pipe body 1 is coated with an anti-corrosion layer 7, which is composed of epoxy resin and hot-dip galvanized material. The two materials are melted into a machining molten liquid and coated on the surface of the steel pipe. After curing, a paint film is formed, which is tightly bonded to the surface of the steel pipe and is not easy to peel off. It resists the corrosion of chemicals such as acids, alkalis, and salts, prevents external corrosive media from contacting the steel pipe, and can withstand a certain amount of mechanical impact and friction. It is not easily damaged and effectively increases the corrosion resistance of the steel pipe.

[0027] Example 2: This example is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1-4 A type of anti-corrosion steel pipe for pipeline lining repair also includes a splicing assembly. The splicing assembly facilitates the splicing and installation of two steel pipe bodies 1. The splicing assembly includes a threaded strip 21 set on the inner wall of an embedded groove 2, and a threaded groove 31 on the outer wall of a retaining ring 3. The threaded groove 31 is threadedly connected to the threaded strip 21. As the threaded strip 21 is screwed into the threaded groove 31, the friction between the threaded strip 21 and the threaded groove 31 gradually increases, making the connection between the two steel pipe bodies 1 increasingly tighter, ultimately achieving a stable connection. The accommodating cavity of the embedded groove 2 matches the outer diameter of the retaining ring 3, ensuring that the retaining ring 3 can be smoothly inserted into the embedded groove 2 for precise positioning. The retaining ring 3 not only serves a positioning function but also provides a carrier for the threaded groove 31. During installation, after the retaining ring 3 is inserted into the embedded groove 2, the threaded groove 31 aligns with the threaded strip 21, creating conditions for subsequent threaded connection.

[0028] Specifically, during installation, the retaining ring 3 at the bottom of the steel pipe body 1 is aligned with the inner groove 2 and engaged, achieving quick and precise initial positioning. Then, by rotating the steel pipe body 1, the threaded strip 21 is gradually screwed into the threaded groove 31. Based on the helix angle and friction principle of the thread, during rotation, a force is generated between the threaded strip 21 and the threaded groove 31 along the thread axis. This force causes the two steel pipes to gradually approach and tightly connect together. As rotation continues, the engagement between the threads becomes increasingly tight, and the connection force gradually increases, ultimately achieving a secure splicing of the two steel pipes.

[0029] Example 3: This example is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1-4 A corrosion-resistant steel pipe for pipeline lining repair also includes a sealing assembly. The sealing assembly facilitates the sealing connection of two steel pipe bodies 1 after installation. The sealing assembly includes a fixing plate 61 fixed to the outer wall of the steel pipe body 1, providing a fixed connection point for a spring 62, allowing the spring 62 to be stably installed on the steel pipe body 1. A spring 62 is fixedly connected to one end of the fixing plate 61, and a fastening ring 63 is fixedly connected to the other end of the spring 62. Multiple fixing plates 61 and springs 62 are arranged in a circumferential array, ensuring uniform pressure application in the circumferential direction of the steel pipe. This makes the pressure of the fastening ring 63 on the second sealing washer 6 more uniform, improving the sealing effect. The inner wall of the fastening ring 63 slides against the outer wall of the second sealing washer 6. Continuous elastic pressure is provided to the fastening ring 63, ensuring that the fastening ring 63 always fits tightly against the first sealing washer 5 and the second sealing washer 6, guaranteeing the reliability of the seal.

[0030] Specifically, before splicing the pipes, the fastening ring 63 is manually pulled to slide on the outer wall of the steel pipe body 1 and compress the spring 62 until the fastening ring 63 slides to the outer wall of the second sealing washer 6. Then, the two steel pipe bodies 1 are spliced ​​and installed using the splicing assembly. After installation, the fastening ring 63 is released. At this time, the pressure on the spring 62 is released, and the elastic restoring force of the spring 62 drives the fastening ring 63 to return to its original position. It continuously applies uniform radial pressure to the first sealing washer 5 and the second sealing washer 6. Under the action of the two sealing washer, a reliable sealing barrier is formed, which can effectively prevent the medium being transported in the pipeline from leaking from the connection point, and can also resist the intrusion of external moisture, dust and other impurities into the pipeline, ensuring the good performance of the pipeline.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A corrosion-resistant steel pipe for pipeline lining repair, comprising a steel pipe body (1), characterized in that: One end of the steel pipe body (1) is provided with an embedded groove (2), the other end of the steel pipe body (1) is fixedly connected with a retaining ring (3), the inner wall of the steel pipe body (1) is fixed with a spiral steel bar (4), the two ends of the steel pipe body (1) are respectively fixedly sleeved with a first sealing gasket (5) and a second sealing gasket (6), and the outer wall of the steel pipe body (1) is coated with an anti-corrosion layer (7). Also includes: The splicing assembly facilitates the splicing and installation of two steel pipe bodies (1); A sealing assembly that facilitates a sealed connection between the two steel pipe bodies (1) after installation.

2. The anti-corrosion steel pipe for pipeline lining repair according to claim 1, characterized in that: The splicing assembly includes a threaded strip (21) disposed on the inner wall of the embedded groove (2), and a threaded groove (31) is provided on the outer wall of the retaining ring (3). The threaded groove (31) is threadedly connected to the threaded strip (21), and the accommodating cavity of the embedded groove (2) matches the outer diameter of the retaining ring (3).

3. The anti-corrosion steel pipe for pipeline lining repair according to claim 1, characterized in that: The sealing assembly includes a fixing plate (61) fixed to the outer wall of the steel pipe body (1), a spring (62) fixedly connected to one end of the fixing plate (61), and a fastening ring (63) fixedly connected to the other end of the spring (62).

4. The anti-corrosion steel pipe for pipeline lining repair according to claim 3, characterized in that: The fixing plate (61) and spring (62) are arranged in a circumferential array in multiple ways.

5. The anti-corrosion steel pipe for pipeline lining repair according to claim 3, characterized in that: The inner wall of the fastening ring (63) slides against the outer wall of the second sealing gasket (6).

6. The anti-corrosion steel pipe for pipeline lining repair according to claim 1, characterized in that: The anti-corrosion layer (7) is composed of epoxy resin and hot-dip galvanized material.

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