Corrosion-resistant duplex stainless steel pipe for deep sea platform

Abstract

The application discloses a kind of deep-sea platform corrosion-resistant duplex stainless steel pipes, it is related to corrosion-resistant duplex stainless steel pipe technical field, including first steel pipe, the first steel pipe right end is connected with second steel pipe by butt joint mechanism;First sealing ring, the butt joint mechanism is equipped with first sealing ring and second sealing ring.This kind of deep-sea platform corrosion-resistant duplex stainless steel pipe design novel, simple structure, in the connection of first steel pipe and second steel pipe, the surface thread connection of threaded cylinder and outer thread pipe is tightly fitted with first sealing ring between outer thread pipe and threaded cylinder, the sealing property of threaded cylinder and outer thread pipe left end connecting place is realized by first sealing ring, the sealing of cooperatively arranged second sealing ring is below, the sealing property of threaded cylinder and outer thread pipe connection is greatly improved, avoid the case that liquid penetrates, improve sealing effect, guarantee the service life of first steel pipe and second steel pipe.

Description

Technical Field

[0001] This application relates to the field of corrosion-resistant duplex stainless steel pipe technology, and in particular to a corrosion-resistant duplex stainless steel pipe for deep-sea platforms. Background Technology

[0002] Corrosion-resistant duplex stainless steel pipe is a special type of pipe that combines the advantages of austenitic and ferritic stainless steel. It is widely used in fields with stringent material performance requirements, such as chemical, petroleum, marine engineering, and papermaking. With the rapid development of the marine engineering and chemical industries, the application prospects of duplex stainless steel will continue to expand.

[0003] In existing stainless steel pipe connections for deep-sea platforms, tiny gaps exist at threaded and flanged joints, allowing media to penetrate and enter the pipes. This accelerates the corrosion rate within the stainless steel pipes, impacting their service life. Therefore, this paper proposes a corrosion-resistant duplex stainless steel pipe for deep-sea platforms to address this issue. Utility Model Content

[0004] This embodiment provides a corrosion-resistant duplex stainless steel pipe for deep-sea platforms to solve the problem that in existing stainless steel pipe connections on deep-sea platforms, there are tiny gaps at the threaded and flanged connections, allowing the medium to enter the pipe through the gaps, which leads to an accelerated corrosion rate inside the stainless steel pipe and affects the service life of the stainless steel pipe.

[0005] According to one aspect of this application, a corrosion-resistant duplex stainless steel pipe for deep-sea platforms is provided, comprising a first steel pipe, the right end of which is connected to a second steel pipe via a docking mechanism.

[0006] The first sealing ring and the second sealing ring are installed inside the docking mechanism.

[0007] Furthermore, the first steel pipe includes a first inner stainless steel pipe layer, a first corrosion-resistant pipe layer, and a first outer stainless steel pipe layer. The first corrosion-resistant pipe layer is fixedly bonded to the outer surface of the first inner stainless steel pipe layer, and the outer surface of the first corrosion-resistant pipe layer is fixedly bonded to the inner wall of the first outer stainless steel pipe layer.

[0008] Furthermore, the second steel pipe includes a second inner stainless steel pipe layer, a second corrosion-resistant pipe layer, and a second outer stainless steel pipe layer. The second corrosion-resistant pipe layer is fixedly bonded to the outer surface of the second inner stainless steel pipe layer, and the outer surface of the second corrosion-resistant pipe layer is fixedly bonded to the inner wall of the second inner stainless steel pipe layer.

[0009] Furthermore, the docking mechanism includes a threaded cylinder, an external threaded tube, and a limiting ring. The threaded cylinder is fixedly sleeved on the right end surface of the first steel pipe, and the limiting ring is fixedly sleeved on the left end surface of the second steel pipe. The left end of the limiting ring is fixedly connected to an external threaded tube sleeved on the left end surface of the second steel pipe.

[0010] Furthermore, a second sealing ring is fitted onto the right end surface of the externally threaded tube, the externally threaded tube is threadedly connected to the inner cavity of the threaded cylinder, and the right end of the threaded cylinder is in close contact with the second sealing ring and the limiting ring.

[0011] Furthermore, the first sealing ring is fitted onto the right end surface of the first steel pipe, and the first sealing ring is positioned to fit tightly against the left end of the threaded cylinder and the external threaded pipe.

[0012] The above embodiments of this application employ a docking mechanism, a first sealing ring, and a second sealing ring, which solves the problem that in existing deep-sea platform stainless steel pipe connections, there are tiny gaps at the threaded and flanged connections, allowing the medium to enter the pipe through the gaps, leading to an accelerated corrosion rate inside the stainless steel pipe and affecting the service life of the stainless steel pipe. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application.

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of one embodiment of this application;

[0015] Figure 2 This is a schematic front cross-sectional view of one embodiment of this application.

[0016] In the diagram: 1. First steel pipe; 11. First inner stainless steel pipe layer; 12. First corrosion-resistant pipe layer; 13. First outer stainless steel pipe layer; 2. Second steel pipe; 21. Second inner stainless steel pipe layer; 22. Second corrosion-resistant pipe layer; 23. Second outer stainless steel pipe layer; 3. Connecting mechanism; 31. Threaded cylinder; 32. External threaded pipe; 33. Limiting ring; 4. First sealing ring; 5. Second sealing ring. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0019] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0020] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0021] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0023] The corrosion-resistant duplex stainless steel pipe of this application embodiment is described below.

[0024] Please see Figure 1-2 As shown, a corrosion-resistant duplex stainless steel pipe for deep-sea platforms includes a first steel pipe 1, the right end of which is connected to a second steel pipe 2 via a docking mechanism 3.

[0025] The first sealing ring 4 and the second sealing ring 5 are installed inside the docking mechanism 3.

[0026] The first steel pipe 1 includes a first inner stainless steel pipe layer 11, a first corrosion-resistant pipe layer 12 and a first outer stainless steel pipe layer 13. The first corrosion-resistant pipe layer 12 is fixedly bonded to the outer surface of the first inner stainless steel pipe layer 11, and the outer surface of the first corrosion-resistant pipe layer 12 is fixedly bonded to the inner wall of the first outer stainless steel pipe layer 13.

[0027] The second steel pipe 2 includes a second inner stainless steel pipe layer 21, a second corrosion-resistant pipe layer 22, and a second outer stainless steel pipe layer 23. The second corrosion-resistant pipe layer 22 is fixedly bonded to the outer surface of the second inner stainless steel pipe layer 21, and the outer surface of the second corrosion-resistant pipe layer 22 is fixedly bonded to the inner wall of the second inner stainless steel pipe layer 21.

[0028] The docking mechanism 3 includes a threaded cylinder 31, an external threaded tube 32, and a limiting ring 33. The threaded cylinder 31 is fixedly sleeved on the right end surface of the first steel pipe 1, and the limiting ring 33 is fixedly sleeved on the left end surface of the second steel pipe 2. The left end of the limiting ring 33 is fixedly connected to the external threaded tube 32 sleeved on the left end surface of the second steel pipe 2.

[0029] The right end of the external threaded tube 32 is fitted with a second sealing ring 5. The external threaded tube 32 is threadedly connected to the inner cavity of the threaded cylinder 31. The right end of the threaded cylinder 31, the second sealing ring 5, and the limiting ring 33 are in close contact.

[0030] The first sealing ring 4 is fitted onto the right end surface of the first steel pipe 1, and the first sealing ring 4 is set to fit tightly against the left end of the threaded cylinder 31 and the external threaded pipe 32.

[0031] In use, all electrical components of this invention are externally connected to a power source and control switch. The first corrosion-resistant tube layer 12 within the first steel pipe 1 effectively improves the overall corrosion resistance of the first steel pipe 1. Similarly, the second corrosion-resistant tube layer 22 within the second steel pipe 2 effectively improves the overall corrosion resistance of the second steel pipe 2. In the connection between the first steel pipe 1 and the second steel pipe 2, the threaded cylinder 31 and the external threaded pipe 32 are threaded together. A first sealing ring 4 is tightly fitted between the external threaded pipe 32 and the threaded cylinder 31. The first sealing ring 4 achieves a seal at the left end connection between the threaded cylinder 31 and the external threaded pipe 32. Combined with the sealing effect of the second sealing ring 5, the sealing performance of the connection between the threaded cylinder 31 and the external threaded pipe 32 is greatly improved, preventing liquid infiltration, enhancing the sealing effect, and ensuring the service life of both the first steel pipe 1 and the second steel pipe 2.

[0032] The advantages of this application are:

[0033] 1. This type of deep-sea platform uses a novel and simple design for its corrosion-resistant duplex stainless steel pipe. The first corrosion-resistant layer within the first steel pipe effectively improves its overall corrosion resistance. Similarly, the second corrosion-resistant layer within the second steel pipe enhances its overall corrosion resistance. In the connection between the first and second steel pipes, a threaded cylinder and an external threaded pipe are threaded together, with a first sealing ring tightly fitted between them. This first sealing ring ensures a tight seal at the left end of the connection between the threaded cylinder and the external threaded pipe. Combined with the second sealing ring, this significantly improves the sealing performance of the connection between the threaded cylinder and the external threaded pipe, preventing liquid ingress, enhancing the sealing effect, and ensuring the service life of both the first and second steel pipes.

[0034] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve any improvement to the software and methods.

[0035] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A corrosion-resistant duplex stainless steel pipe for deep-sea platforms, characterized in that, It includes a first steel pipe (1), the right end of which is connected to a second steel pipe (2) via a docking mechanism (3); The first sealing ring (4) and the second sealing ring (5) are installed inside the docking mechanism (3).

2. The corrosion resistant duplex stainless steel pipe for deep sea platform according to claim 1, characterized by: The first steel pipe (1) includes a first inner stainless steel pipe layer (11), a first corrosion-resistant pipe layer (12) and a first outer stainless steel pipe layer (13). The first corrosion-resistant pipe layer (12) is fixedly bonded to the outer surface of the first inner stainless steel pipe layer (11), and the outer surface of the first corrosion-resistant pipe layer (12) is fixedly bonded to the inner wall of the first outer stainless steel pipe layer (13).

3. The corrosion resistant duplex stainless steel pipe for deep sea platform according to claim 1, characterized by: The second steel pipe (2) includes a second inner stainless steel pipe layer (21), a second corrosion-resistant pipe layer (22), and a second outer stainless steel pipe layer (23). The second corrosion-resistant pipe layer (22) is fixedly bonded to the outer surface of the second inner stainless steel pipe layer (21), and the outer surface of the second corrosion-resistant pipe layer (22) is fixedly bonded to the inner wall of the second inner stainless steel pipe layer (21).

4. The corrosion-resistant duplex stainless steel pipe for deep-sea platforms according to claim 1, characterized in that: The docking mechanism (3) includes a threaded cylinder (31), an external threaded tube (32), and a limiting ring (33). The threaded cylinder (31) is fixedly sleeved on the right end surface of the first steel pipe (1), and the limiting ring (33) is fixedly sleeved on the left end surface of the second steel pipe (2). The left end of the limiting ring (33) is fixedly connected to the external threaded tube (32) sleeved on the left end surface of the second steel pipe (2).

5. The corrosion-resistant duplex stainless steel pipe for deep-sea platforms according to claim 4, characterized in that: The right end surface of the external threaded tube (32) is fitted with a second sealing ring (5). The external threaded tube (32) is threadedly connected to the inner cavity of the threaded cylinder (31). The right end of the threaded cylinder (31) is in close contact with the second sealing ring (5) and the limiting ring (33).

6. The corrosion-resistant duplex stainless steel pipe for deep-sea platforms according to claim 1, characterized in that: The first sealing ring (4) is fitted onto the right end surface of the first steel pipe (1), and the first sealing ring (4) is set on the threaded cylinder (31) and the left end of the external threaded pipe (32) in close contact.

Images