Corrosion-resistant stainless steel seamless steel pipe for marine environment

Abstract

The utility model relates to the technical field of seamless steel pipes, and discloses a marine environment corrosion-resistant stainless steel seamless steel pipe which comprises a steel pipe body, the outer wall of the steel pipe body is fixedly connected with a fixing ring, the outer wall of the fixing ring is rotatably connected with a sleeve, the inner wall of the sleeve is in threaded connection with a threaded sleeve, and the threaded sleeve is connected with a mounting ring through a clamping assembly. The inner wall of the mounting ring is fixedly connected to the outer wall of the steel pipe body, a protective coating is arranged on the inner wall of the steel pipe body, a corrosion-resistant alloy layer is arranged on the inner wall of the protective coating, a middle transition layer is arranged on the inner wall of the corrosion-resistant alloy layer, and a base stainless steel layer is arranged on the inner wall of the middle transition layer. According to the steel pipe, the multiple steel pipe bodies can be conveniently spliced, the installation process is simplified, the construction efficiency is improved, the steel pipe bodies are protected through the protective coatings and the corrosion-resistant alloy layers, and the service life of the steel pipe is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of seamless steel pipe technology, and in particular to corrosion-resistant stainless steel seamless steel pipes for marine environments. Background Technology

[0002] Corrosion-resistant stainless steel seamless pipe is a type of steel pipe with excellent corrosion resistance. It is a seamless pipe made through a special steelmaking process and alloy composition design. Its characteristics are that there are no welds inside the steel pipe and the overall structure is continuous and uniform. This makes it have higher strength and better leakage resistance than welded steel pipe when subjected to pressure and corrosive media, and it can adapt to more complex environments.

[0003] Currently, stainless steel seamless pipes are usually connected using bolts. The installation process requires rotating the bolts one by one to connect the two sides of the stainless steel seamless pipes together. The repeated rotation of the bolts results in low construction efficiency and wastes time, leading to a low overall construction efficiency that is difficult to meet the needs of high-efficiency engineering construction.

[0004] In response to the technical problem of low construction efficiency when using bolted connections, this application proposes a seamless stainless steel pipe resistant to corrosion in marine environments. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a marine environment corrosion-resistant stainless steel seamless steel pipe. It facilitates the splicing of multiple steel pipe bodies, simplifies the installation process, improves construction efficiency, and extends the service life of the steel pipe by protecting the steel pipe body with a protective coating and a corrosion-resistant alloy layer.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a seamless stainless steel pipe resistant to corrosion in marine environments, comprising a pipe body, a fixing ring fixedly connected to the outer wall of the pipe body, a sleeve rotatably connected to the outer wall of the fixing ring, a threaded sleeve threadedly connected to the inner wall of the sleeve, the threaded sleeve being connected to an installation ring via a snap-fit ​​assembly, the inner wall of the installation ring being fixedly connected to the outer wall of the pipe body, a protective coating provided on the inner wall of the pipe body, a corrosion-resistant alloy layer provided on the inner wall of the protective coating, an intermediate transition layer provided on the inner wall of the corrosion-resistant alloy layer, and a base stainless steel layer provided on the inner wall of the intermediate transition layer.

[0007] Furthermore, the snap-fit ​​assembly includes multiple snap-fit ​​blocks slidably connected to the inner wall of the mounting ring. Each snap-fit ​​block has a spring fixedly connected to its inner side, and the other end of each spring is fixedly connected to the inner wall of the mounting ring. The inner wall of the threaded sleeve has multiple snap-fit ​​grooves, and the snap-fit ​​blocks are shaped to fit the snap-fit ​​grooves.

[0008] Furthermore, the left side of the card block is a slope.

[0009] Furthermore, the outer wall of the steel pipe body is provided with grooves on both sides, and a slider is slidably connected to the inner wall of the groove. The opposite end of the slider is fixedly connected to the inner wall of the threaded sleeve.

[0010] Furthermore, the protective coating is made of epoxy resin and curing agent, the corrosion-resistant alloy layer is made of nickel-based alloy, and the intermediate transition layer is made of nickel-copper alloy.

[0011] Furthermore, the base stainless steel layer is made of stainless steel.

[0012] Furthermore, the thickness of the protective coating is 0.5 mm.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, the threaded sleeve is driven to move to the mounting ring on the outer wall of another steel pipe body by rotating the sleeve, so that the locking block inside the mounting ring enters the locking groove on the inner wall of the threaded sleeve, thus fixing them together, which facilitates the installation work, simplifies the installation process, and improves construction efficiency.

[0015] 2. In this utility model, the steel pipe body is protected by a protective coating and a corrosion-resistant alloy layer, which makes it have good environmental adaptability and can be in the marine environment for a long time, thereby extending the service life of the steel pipe. Attached Figure Description

[0016] Figure 1 This is a perspective view of the seamless stainless steel pipe for marine environment corrosion resistance proposed in this utility model.

[0017] Figure 2 This is a cross-sectional view of the threaded sleeve of the marine environment corrosion-resistant stainless steel seamless pipe proposed in this utility model.

[0018] Figure 3 This is a cross-sectional view of the installation ring of the marine environment corrosion-resistant stainless steel seamless pipe proposed in this utility model.

[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0020] Figure 5 This is a schematic diagram of the main structure of the marine environment corrosion-resistant stainless steel seamless steel pipe proposed in this utility model.

[0021] Legend:

[0022] 1. Steel pipe body; 2. Fixing ring; 3. Sleeve; 4. Slide groove; 5. Slider; 6. Threaded sleeve; 7. Mounting ring; 8. Clamping block; 9. Spring; 10. Protective coating; 11. Corrosion-resistant alloy layer; 12. Intermediate transition layer; 13. Base stainless steel layer; 14. Slot. Detailed Implementation

[0023] 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.

[0024] Reference Figures 1-3 This utility model provides an embodiment of a seamless stainless steel pipe resistant to corrosion in marine environments, comprising a pipe body 1, a fixing ring 2 fixedly connected to the outer wall of the pipe body 1, a sleeve 3 rotatably connected to the outer wall of the fixing ring 2, and a threaded sleeve 6 threadedly connected to the inner wall of the sleeve 3. (Refer to...) Figure 4 Multiple locking blocks 8 are slidably connected to the inner wall of the mounting ring 7. Springs 9 are fixedly connected to the inner side of each locking block 8. The other end of each spring 9 is fixedly connected to the inner wall of the mounting ring 7. Multiple slots 14 are opened on the inner wall of the threaded sleeve 6. The locking blocks 8 and slots 14 are shaped to fit each other. One side of the left end of each locking block 8 is beveled. The inner wall of the mounting ring 7 is fixedly connected to the outer wall of the steel pipe body 1. Sliding grooves 4 are opened on both sides of the outer wall of the steel pipe body 1. Sliding sliders 5 are slidably connected to the inner wall of the sliding grooves 4. The opposite end of each sliding slider 5 is fixedly connected to the inner wall of the threaded sleeve 6.

[0025] Specifically, the outer wall of the sleeve 3 is provided with anti-slip texture, which makes it easy to rotate the sleeve 3. When the sleeve 3 drives the threaded sleeve 6 to move, the slider 5 on the inner side of the threaded sleeve 6 will slide in the groove 4, so that the threaded sleeve 6 moves in a straight line during the movement. The left side of the locking block 8 is inclined, so that when the threaded sleeve 6 passes the locking block 8, it can squeeze the locking block 8 into the mounting ring 7. When the threaded sleeve 6 moves to the surface of the mounting ring 7 and is fixed, the connection on both sides will be coated with sealant to prevent seawater from entering.

[0026] Reference Figure 5 The inner wall of the steel pipe body 1 is provided with a protective coating 10, the inner wall of the protective coating 10 is provided with a corrosion-resistant alloy layer 11, the inner wall of the corrosion-resistant alloy layer 11 is provided with an intermediate transition layer 12, and the inner wall of the intermediate transition layer 12 is provided with a base stainless steel layer 13. The protective coating 10 is made of epoxy resin and curing agent, the corrosion-resistant alloy layer 11 is made of nickel-based alloy, the intermediate transition layer 12 is made of nickel-copper alloy, the base stainless steel layer 13 is made of stainless steel, and the thickness of the protective coating 10 is 0.5mm.

[0027] Specifically, the steel pipe body 1, fixing ring 2, sleeve 3, and threaded sleeve 6 are all coated with a protective coating 10. The protective coating 10 is made of epoxy resin and a curing agent. The epoxy resin provides the main film-forming substance and has good adhesion and chemical stability. The curing agent reacts with the epoxy resin to cure the coating and form a tough protective film. The corrosion-resistant alloy layer 11 is made of a nickel-based alloy. Nickel provides good corrosion resistance and toughness, while chromium can form a dense oxide film to enhance oxidation resistance. The intermediate transition layer 12 is made of a nickel-copper alloy, whose main components are nickel and copper, and also contains... Small amounts of elements such as iron and manganese, along with nickel, provide the basis for corrosion resistance and good bonding properties. Copper can improve the alloy's processing performance and corrosion resistance in certain special environments. Other elements in the alloy help to adjust its physical and chemical properties, enabling it to effectively mitigate stress between different layers. The base stainless steel layer 13 is made of stainless steel, with iron, chromium, and nickel as its main components. Chromium forms a thin and dense chromium oxide protective film on the stainless steel surface, preventing further oxygen intrusion. Nickel can stabilize the austenitic structure, improving the toughness and corrosion resistance of the base stainless steel layer 13.

[0028] Working principle: When splicing multiple steel pipe bodies 1, align the right side of the previous steel pipe body 1 with the left side of the next steel pipe body 1, and then rotate the sleeve 3 to move the threaded sleeve 6 towards the outer wall of another steel pipe body 1. When the threaded sleeve 6 moves to the mounting ring 7 on the outer wall of the other steel pipe body 1, the threaded sleeve 6 will squeeze the locking block 8 during the movement, causing the locking block 8 to retract into the mounting ring 7. At the same time, the locking block 8 compresses the spring 9. When the locking block 8 and the locking groove 14 are on the same plane, the spring 9 will rebound the locking block 8 into the locking groove 14, fixing the threaded sleeve 6 on the outer wall of the previous steel pipe body 1 and the mounting ring 7 on the outer wall of the next steel pipe body 1 together, thus completing the installation.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A seamless stainless steel pipe resistant to corrosion in marine environments, characterized in that, The system includes a steel pipe body (1), a fixing ring (2) fixedly connected to the outer wall of the steel pipe body (1), a sleeve (3) rotatably connected to the outer wall of the fixing ring (2), a threaded sleeve (6) threadedly connected to the inner wall of the sleeve (3), the threaded sleeve (6) being connected to the mounting ring (7) via a snap-fit ​​assembly, the inner wall of the mounting ring (7) being fixedly connected to the outer wall of the steel pipe body (1), a protective coating (10) provided on the inner wall of the steel pipe body (1), a corrosion-resistant alloy layer (11) provided on the inner wall of the protective coating (10), an intermediate transition layer (12) provided on the inner wall of the corrosion-resistant alloy layer (11), and a base stainless steel layer (13) provided on the inner wall of the intermediate transition layer (12).

2. The seamless stainless steel pipe for marine environment corrosion resistance according to claim 1, characterized in that: The snap-fit ​​assembly includes multiple snap-fit ​​blocks (8) that are slidably connected to the inner wall of the mounting ring (7). Each snap-fit ​​block (8) has a spring (9) fixedly connected to its inner side. The other end of each spring (9) is fixedly connected to the inner wall of the mounting ring (7). The inner wall of the threaded sleeve (6) has multiple slots (14), and the snap-fit ​​blocks (8) are shaped to match the slots (14).

3. The marine environment corrosion-resistant stainless steel seamless pipe according to claim 2, characterized in that: The left side of the card block (8) is a slope.

4. The seamless stainless steel pipe for marine environment corrosion resistance according to claim 1, characterized in that: The outer walls of the steel pipe body (1) are provided with grooves (4) on both sides. A slider (5) is slidably connected to the inner wall of the groove (4). One end of the slider (5) is fixedly connected to the inner wall of the threaded sleeve (6).

5. The seamless stainless steel pipe for marine environments resistant to corrosion as described in claim 1, characterized in that: The base stainless steel layer (13) is made of stainless steel.

6. The seamless stainless steel pipe for marine environment corrosion resistance according to claim 1, characterized in that: The protective coating (10) has a thickness of 0.5 mm.

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