High strength corrosion resistant stainless steel pipe

Abstract

The utility model provides a high-strength corrosion-resistant stainless steel pipe, including a stainless steel outer pipe, a chloride ion anti-corrosion film, a stainless steel inner pipe and a supporting inner ring. A layer of the chloride ion anti-corrosion film is arranged on the outside of the stainless steel outer pipe, and a plurality of supporting inner rings are fixedly installed between the stainless steel outer pipe and the stainless steel inner pipe. The chloride ion anti-corrosion film of the utility model adopts a multi-layer design to effectively isolate chloride ions. The activated carbon film has strong adsorption and reduces the contact between chloride ions and steel pipes. The concave-convex structure of the resin surface increases the coating area, disperses ultraviolet rays, prolongs the service life, and forms a physical barrier to prevent chloride ion penetration. The supporting inner ring buffers the impact of the inner and outer pipes, reduces friction, and protects the system. At the same time, it reduces noise, adapts to temperature changes, and prevents damage caused by thermal expansion and contraction.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel pipes, and particularly relates to a high-strength corrosion-resistant stainless steel pipe. Background Art

[0002] Stainless steel pipe is a hollow long cylindrical steel. It is used as a pipeline for conveying fluids. It is mainly used in industrial pipelines such as petroleum, chemical, medical, food, light industry, mechanical instruments, and mechanical structural components. Stainless steel pipe is made of acid-resistant and heat-resistant steel billets, which are heated, perforated, sizing, hot rolled, and cut.

[0003] Chloride ions (Cl-) are -1 valent ions of chlorine that are widely present in nature. They will form a rust layer formed by ferric chloride on the surface of the steel pipe, and this process will cause the steel pipe to corrode slowly. In addition, chloride ions can also promote the expansion of gaps and cracks on the surface of the steel pipe, which will accelerate the corrosion of the steel pipe.

[0004] At present, although steel pipes are generally coated with a layer of passivation film to resist chloride ion corrosion, this method has obvious limitations. Since the passivation film cannot absorb chloride ions, its anti-corrosion ability will gradually weaken over time, and it is difficult to effectively block the erosion of chloride ions in the long term. This means that steel pipes are still facing the risk of chloride ion corrosion during long-term use, which affects their service life and safety.

[0005] In addition, in the design of steel pipes, a support plate is usually used between the inner and outer pipes to achieve a reinforcement effect. However, this design exposes some problems in actual application. When the outer pipe is subjected to a strong impact force, the impact force will be transmitted to the inner pipe through the support plate, thereby increasing the risk of damage to the inner pipe. At the same time, the support plate performs poorly in response to temperature changes and cannot adapt to the phenomenon of thermal expansion and contraction. Thermal expansion and contraction can easily cause damage or leakage of the inner and outer pipes, further affecting the overall performance and safety of the steel pipe.

[0006] Therefore, it is very necessary to invent a high-strength corrosion-resistant stainless steel pipe. Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides a high-strength corrosion-resistant stainless steel pipe, comprising a stainless steel outer pipe, a chloride ion anti-corrosion film, a stainless steel inner pipe and a supporting inner ring, wherein a layer of the chloride ion anti-corrosion film is arranged on the outside of the stainless steel outer pipe, and a plurality of the supporting inner rings are fixedly installed between the stainless steel outer pipe and the stainless steel inner pipe;

[0008] The chloride ion anti-corrosion film includes a barrier film, a light scattering structure and a chloride ion adsorption film. The barrier film is provided with multiple layers. The surface of the barrier film is provided with a light scattering structure. The chloride ion adsorption film is compositely arranged between the barrier films. The innermost barrier film is compositely arranged on the outside of the stainless steel outer tube.

[0009] Preferably, a passivation film is provided on the outer surface of the stainless steel outer tube and the inner surface of the stainless steel inner tube, and the chloride ion anti-corrosion film is located outside the passivation film of the stainless steel outer tube.

[0010] Preferably, the barrier film is a film made of a polymer resin material capable of scattering light, and the chloride ion adsorption film between the barrier films is an activated carbon film.

[0011] Preferably, the light scattering structure disposed on the surface of the barrier film is a tiny uneven concave-convex structure, and the light scattering structure can disperse the refracted light.

[0012] Preferably, the supporting inner ring is a hollow circular ring structure, a buffer and noise reduction filler is arranged inside the hollow cavity of the supporting inner ring, and a plurality of the supporting inner rings are equidistantly distributed in the relative displacement area between the stainless steel outer tube and the stainless steel inner tube.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model adopts a multi-layer structure design, and each layer can effectively isolate chloride ions. The activated carbon film can absorb and fix chloride ions in the environment with its strong adsorption capacity, significantly reducing the contact probability between chloride ions and the steel pipe substrate. At the same time, the tiny concave-convex structure on the surface of each layer of resin not only increases the surface area of ​​the coating, effectively disperses ultraviolet rays, and prolongs the service life, but also forms a physical barrier to further hinder the penetration of chloride ions. In addition, the supporting inner ring acts as a buffer between the inner and outer pipes, which can absorb and disperse impact energy, reduce collision friction, and protect the pipeline system from damage. It can also reduce noise, adapt to temperature changes, and prevent pipeline damage or leakage caused by thermal expansion and contraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial cross-sectional structural schematic diagram of the utility model.

[0016] Figure 2 It is a schematic diagram of the structure of the chloride ion anticorrosive membrane of the utility model.

[0017] In the figure:

[0018] Stainless steel outer tube 1, chloride ion anti-corrosion film 2, barrier film 21, light scattering structure 22, chloride ion adsorption film 23, stainless steel inner tube 3, supporting inner ring 4. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0020] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0021] As attached Figure 1 To Attachment Figure 2 As shown:

[0022] The high-strength corrosion-resistant stainless steel pipe provided by the utility model comprises a stainless steel outer pipe 1, a chloride ion anti-corrosion film 2, a stainless steel inner pipe 3 and a supporting inner ring 4. A layer of the chloride ion anti-corrosion film 2 is arranged on the outside of the stainless steel outer pipe 1, and a plurality of the supporting inner rings 4 are fixedly installed between the stainless steel outer pipe 1 and the stainless steel inner pipe 3.

[0023] The chloride ion anti-corrosion film 2 includes a barrier film 21, a light scattering structure 22 and a chloride ion adsorption film 23. The barrier film 21 is provided with multiple layers. The light scattering structure 22 is provided on the surface of the barrier film 21. The chloride ion adsorption film 23 is compositely arranged between the barrier films 21. The innermost barrier film 21 is compositely arranged on the outside of the stainless steel outer tube 1.

[0024] Embodiment 1:

[0025] Specifically, a passivation film is provided on the outer surface of the stainless steel outer tube 1 and the inner surface of the stainless steel inner tube 3, which further enhances the corrosion resistance of the steel tube. The chloride ion anti-corrosion film 2 is located outside the passivation film of the stainless steel outer tube 1, forming a double protection to ensure the long-term stable operation of the steel tube.

[0026] Specifically, the barrier film 21 is a film made of a polymer resin material that can scatter light, and the chloride ion adsorption film 23 between the barrier films 21 is an activated carbon film. The chloride ion adsorption film 23 can effectively adsorb and fix chloride ions in the environment, thereby preventing chloride ions from corroding the steel pipe.

[0027] Specifically, the light scattering structure 22 disposed on the surface of the barrier film 21 is a tiny uneven concave-convex structure, which can disperse and refract the light. This structure can effectively disperse and refract the light. When the light is irradiated on the barrier film 21, these concave-convex structures will cause the light to be reflected and refracted multiple times, thereby avoiding direct penetration and focusing of the light. This scattering effect not only reduces the light intensity on the surface of the steel pipe, but also reduces the damage of ultraviolet rays to the steel pipe.

[0028] Specifically, the inner support ring 4 is a hollow ring structure, and a buffer noise reduction filler is arranged inside the hollow cavity of the inner support ring 4. Many inner support rings 4 are equidistantly arranged in the relative displacement area between the outer stainless steel tube 1 and the inner stainless steel tube 3. They can not only play a buffering role when relative displacement occurs between the inner and outer tubes, absorb and disperse impact energy, reduce collision and friction between the inner and outer tubes, but also reduce noise generated by vibration and improve the quiet performance of the pipeline system. At the same time, the design of the inner support ring 4 can also adapt to temperature changes, allowing the inner and outer tubes to have a certain displacement space when they expand and contract with heat, so as to prevent pipeline damage or leakage caused by temperature changes.

[0029] Embodiment 2:

[0030] First, when the steel pipe is in an environment containing chloride ions, the chloride ion adsorption film 23 begins to exert its strong adsorption capacity, adsorbing and fixing the chloride ions in the environment on its surface, thereby preventing the chloride ions from directly contacting the steel pipe substrate, greatly reducing the risk of corrosion of the steel pipe. At the same time, the barrier film 21 not only serves as a supporting layer for the chloride ion adsorption film 23, but also further enhances the strength of the anti-corrosion film. The polymer resin material used in the barrier film 21 gives it excellent corrosion resistance and mechanical strength. More importantly, the light scattering structure 22 on the surface of the barrier film 21 can effectively disperse and refract light, reduce the light intensity on the surface of the steel pipe, and reduce the damage of ultraviolet rays to the steel pipe. This light scattering effect not only extends the service life of the steel pipe, but also improves its appearance quality. In addition, the supporting inner ring 4 between the stainless steel outer tube 1 and the stainless steel inner tube 3 plays a role in buffering and noise reduction during the operation of the pipeline system. When the pipeline is subjected to external impact or vibration, the supporting inner ring 4 can absorb and disperse this energy, reduce the direct collision and friction between the inner and outer pipes, and thus protect the pipeline system from damage. At the same time, the hollow cavity of the support inner ring 4 is filled with buffer noise reduction fillers, which can effectively reduce the noise generated by vibration and improve the quiet performance of the pipeline system. When the temperature changes, the design of the support inner ring 4 allows a certain displacement space between the inner and outer pipes to prevent pipeline damage or leakage caused by thermal expansion and contraction. This adaptive design ensures that the pipeline system can maintain its stability and reliability in various environments.

[0031] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. High strength corrosion resistant stainless steel pipe, characterized in that: It comprises a stainless steel outer tube (1), a chloride ion anti-corrosion film (2), a stainless steel inner tube (3) and a supporting inner ring (4); a layer of the chloride ion anti-corrosion film (2) is arranged on the outside of the stainless steel outer tube (1), and a plurality of the supporting inner rings (4) are fixedly installed between the stainless steel outer tube (1) and the stainless steel inner tube (3); The chloride ion anticorrosive film (2) comprises a barrier film (21), a light scattering structure (22) and a chloride ion adsorption film (23); the barrier film (21) is provided with multiple layers; the light scattering structure (22) is provided on the surface of the barrier film (21); the chloride ion adsorption film (23) is compositely provided between the barrier films (21); and the innermost barrier film (21) is compositely provided on the outside of the stainless steel outer tube (1).

2. The high-strength corrosion-resistant stainless steel pipe according to claim 1, characterized in that: A passivation film is provided on the outer surface of the stainless steel outer tube (1) and the inner surface of the stainless steel inner tube (3), and the chloride ion anticorrosive film (2) is located outside the passivation film of the stainless steel outer tube (1).

3. The high-strength corrosion-resistant stainless steel pipe according to claim 1, characterized in that: The barrier film (21) is a thin film made of a polymer resin material capable of scattering light, and the chloride ion adsorption film (23) between the barrier films (21) is an activated carbon film.

4. The high-strength corrosion-resistant stainless steel pipe according to claim 1, characterized in that: The light scattering structure (22) arranged on the surface of the barrier film (21) is a tiny uneven concave-convex structure, and the light scattering structure (22) can disperse refracted light.

5. The high-strength corrosion-resistant stainless steel pipe according to claim 1, characterized in that: The supporting inner ring (4) is a hollow circular ring structure, and a buffer noise reduction filler is arranged inside the hollow cavity of the supporting inner ring (4). A plurality of the supporting inner rings (4) are equidistantly distributed in the relative displacement area between the stainless steel outer tube (1) and the stainless steel inner tube (3).

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