Corrosion-resistant and high-temperature-resistant composite stainless steel pipe

Abstract

The utility model provides a corrosion-resistant high-temperature-resistant composite stainless steel pipe, which comprises a supporting pipeline, an internal protective layer, a heat-insulating reinforcing layer and an outer protective shell, the internal protective layer is fixedly mounted on the inner wall of the supporting pipeline in a bonding manner, and the heat-insulating reinforcing layer is fixedly mounted on the outer side of the supporting pipeline; the outer side protective shell is fixedly installed on the outer side of the heat insulation reinforcing layer. Due to the arrangement of the inner protective layer, the heat insulation reinforcing layer and the outer protective shell, the corrosion resistance, the high temperature resistance and the overall pressure resistance are high.

Description

TECHNICAL FIELD

[0001] The utility model relates to stainless steel pipe technical field especially relates to a kind of corrosion-resistant high-temperature-resistant composite stainless steel pipe. BACKGROUND

[0002] In modern industrial applications, with the increasing demand for the transportation of high temperature and corrosive media, traditional pipeline materials have been difficult to meet the working requirements in harsh environments. Many industries, such as chemical industry, petroleum, metallurgy, etc., are facing the erosion and destruction of pipeline materials by extreme temperature and corrosive chemicals, resulting in frequent replacement and repair of pipelines, increasing production cost and downtime. Therefore, it is an urgent need to develop a corrosion-resistant, high-temperature-resistant composite pipeline.

[0003] Traditional stainless steel pipes have good corrosion resistance and strength, but their performance often decreases under high temperature conditions, especially when they come into contact with some corrosive liquids and gases. High temperature environment can cause material softening, deformation, and even crack. In addition, traditional materials also have deficiencies in fatigue resistance and impact resistance, which are easily affected by external impact and temperature changes, affecting their long-term reliability.

[0004] Therefore, it is necessary to invent a corrosion-resistant, high-temperature-resistant composite stainless steel pipe. SUMMARY

[0005] To solve the above technical problems, the utility model provides a kind of corrosion-resistant high-temperature-resistant composite stainless steel pipe to solve the problem that the existing stainless steel pipe still has poor corrosion resistance, poor high-temperature resistance and poor overall compression resistance. A kind of corrosion-resistant high-temperature-resistant composite stainless steel pipe, including support pipeline, internal protective layer, heat insulation reinforcing layer and outer protective shell, wherein: the internal protective layer is fixedly installed on the inner wall of the support pipeline, and the heat insulation reinforcing layer is fixedly installed on the outer side of the support pipeline, and the outer protective shell is fixedly installed on the outer side of the heat insulation reinforcing layer.

[0006] The heat insulation reinforcing layer includes a support base pipe, a fixed installation slot, a connecting heat insulation strip, a buffer strip and a wrapping shell, and the support base pipe is fixedly installed on the outer side of the support pipeline, and the fixed installation slot is provided on the surface of the support base pipe; the connecting heat insulation strip and the buffer strip are fixedly installed together and around the fixed installation slot inside the fixed installation slot; the bottom surface of the connecting heat insulation strip is fixedly installed on the bottom of the fixed installation slot, and the inner wall of the wrapping shell is fixedly installed on the outer surface of the buffer strip.

[0007] The inner protective layer adopts a transparent pipe made of perfluoroalkoxy resin, and the inner wall of the inner protective layer is provided with corrugations, which have the following effects: ① high corrosion resistance: the inner protective layer adopts perfluoroalkoxy resin material, which has strong corrosion resistance and can effectively resist the corrosion of acid, alkali and other corrosive media. Compared with traditional metal or plastic lining materials, perfluoroalkoxy resin has significant advantages in chemical stability and is suitable for high-corrosion fluid environment; ② flow rate optimization design: the inner wall of the inner protective layer is designed with corrugated structure. This structure helps to generate turbulent flow of fluid, reduces friction between fluid and pipe wall, improves flow rate and optimizes fluid conveying efficiency. This corrugated design can improve medium flow rate better than traditional smooth pipe wall, especially in high-viscosity fluid environment; ③ enhanced structural stability: the inner protective layer is bonded and fixed to the inner wall of the support pipe, forming a firm bonding layer. This fixing method reduces displacement and loosening caused by thermal expansion and contraction, especially suitable for environments with large temperature changes, improving the service life and structural stability of the pipe.

[0008] The support base pipe in the heat-insulating reinforcing layer adopts a nickel-based alloy metal pipe, and the fixed mounting groove adopts a whole spiral groove, and the connecting heat-insulating strip directly contacts the fixed mounting groove; the connecting heat-insulating strip adopts a whole aluminum metal strip, and the connecting heat-insulating strip fills the fixed mounting groove, and the buffer strip adopts a whole aluminum silicate fiber strip; the buffer strip protrudes from the surface of the support base pipe, forming two structures between the support base pipe and the wrapping shell, one being the buffer strip and the other being the gap separated by the buffer strip, which has the following effects: ① excellent heat-insulating effect: the heat-insulating reinforcing layer is composed of multiple layers of structures, including the support base pipe, the connecting heat-insulating strip and the buffer strip, which can form an effective multiple heat-insulating barrier. Compared with single heat-insulating layer design, this multi-layer heat-insulating structure can more effectively reduce heat conduction and is suitable for higher temperature environments; ② structural stability in high-temperature environment: the support base pipe adopts a high-temperature-resistant nickel-based alloy material, which can maintain mechanical strength under extremely high temperature. Compared with traditional heat-insulating layer design, nickel-based alloy can better prevent thermal deformation in high-temperature environment, ensuring structural stability; ③ buffer compression resistance: the buffer strip in the heat-insulating reinforcing layer adopts aluminum silicate fiber material, which has strong compression resistance and buffering performance. In terms of structure, the buffer strip provides buffering isolation between the support base pipe and the wrapping shell, preventing stress accumulation caused by thermal expansion and contraction, effectively protecting the pipe structure.

[0009] The outer protective shell adopts a nickel-based alloy pipe, and the outer side of the outer protective shell is coated with a fluorocarbon corrosion-resistant coating; the outer protective shell is installed at low temperature when the outer protective shell is installed with the heat insulation reinforcing layer, and has the following effects: ① the outer protective shell with high corrosion resistance adopts a nickel-based alloy material, has excellent corrosion resistance, and is particularly suitable for use in harsh environments, such as the chemical industry or marine applications. Compared with conventional stainless steel or other materials, the nickel-based alloy has obvious improvement in corrosion resistance, which can effectively prevent the erosion of the external environment to the pipe; ② fluorocarbon corrosion-resistant coating: the outer side of the outer protective shell is coated with a fluorocarbon corrosion-resistant coating, which provides an additional protective layer. This coating can enhance corrosion resistance and has excellent ultraviolet resistance, prolonging the service life of the outer protective shell. Compared with uncoated or other coated materials, the fluorocarbon coating is more outstanding in durability and performance stability.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. The setting of the internal protective layer has the following effects: ① high corrosion resistance: the internal protective layer adopts perfluoroalkoxy resin material, has very strong corrosion resistance, and can effectively resist the corrosion of acid, alkali and other corrosive media. Compared with traditional metal or plastic lining materials, perfluoroalkoxy resin has obvious advantages in chemical stability and is suitable for high corrosive fluid environment; ② flow rate optimization design: the inner wall of the internal protective layer is designed with a corrugated structure.

[0012] This structure helps to generate turbulent flow of fluid, reduces friction between fluid and pipe wall, improves flow rate and optimizes fluid conveying efficiency. This corrugated design can improve medium flow rate better than traditional smooth pipe wall, especially in high viscosity fluid environment; ③ enhance structural stability: the internal protective layer is bonded and fixed to the inner wall of the support pipe, forming a firm bonding layer. This fixing method reduces the displacement and loosening problem caused by thermal expansion and contraction, is particularly suitable for environments with large temperature changes, and improves the service life and structural stability of the pipe.

[0013] 2. The setting of the heat insulation reinforcing layer has the following effects: ① excellent heat insulation effect:

[0014] The heat insulation reinforcing layer is composed of a plurality of layers, including a support base pipe, a connecting heat insulation strip and a buffer strip, and can form an effective multiple heat insulation barrier. Compared with a single heat insulation layer design, this multi-layer heat insulation structure can more effectively reduce heat conduction and be suitable for higher temperature environments; ②

[0015] Structural stability in high-temperature environment: The support base pipe is made of nickel-based alloy material that can maintain mechanical strength in extremely high-temperature environment. Compared with traditional insulation layer design, nickel-based alloy can better prevent thermal deformation in high-temperature environment, ensuring structural stability; ③ Buffering compression resistance: The buffer strip in the insulation reinforcing layer is made of aluminum silicate fiber material, which has strong compression resistance and buffering performance. In terms of structure, the buffer strip provides buffering isolation between the support base pipe and the wrapped shell, preventing stress accumulation caused by thermal expansion and cold contraction, effectively protecting the pipeline structure.

[0016] 3. The setting of the outer protective shell has the following effects, ① The high-corrosion-resistant outer protective shell is made of nickel-based alloy material, which has excellent corrosion resistance and is particularly suitable for use in harsh environments, such as the chemical industry or marine applications. Compared with conventional stainless steel or other materials, nickel-based alloy has obvious improvement in corrosion resistance, which can effectively prevent the erosion of the pipeline by the external environment; ② Fluorocarbon corrosion-resistant coating: The outer side of the outer protective shell is coated with a fluorocarbon corrosion-resistant coating, providing an additional protective layer. This coating can enhance corrosion resistance and has excellent ultraviolet resistance, extending the service life of the outer protective shell. Compared with uncoated or other coated materials, fluorocarbon coating is more outstanding in durability and performance stability. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the utility model.

[0018] Figure 2 is an enlarged view of A in the utility model.

[0019] In the figure:

[0020] Support pipe 1, inner protective layer 2, insulation reinforcing layer 3, support base pipe 31, fixed mounting groove 32, connecting insulation strip 33, buffer strip 34, wrapped shell 35, outer protective shell 4. DETAILED DESCRIPTION

[0021] In order to enable personnel in the technical field to better understand the utility model scheme, the technical scheme in the utility model embodiment will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the utility model.

[0022] As shown in the accompanying Figure 1 to the accompanying Figure 2 .

[0023] The utility model provides a kind of corrosion-resistant high-temperature-resistant composite stainless steel pipe, including support pipeline 1, internal protective layer 2, heat insulation reinforcing layer 3 and outside protective shell 4, wherein: internal protective layer 2 is fixedly installed on the inner wall of support pipeline 1, and heat insulation reinforcing layer 3 is fixedly installed on the outside of support pipeline 1, and the outside protective shell 4 is fixedly installed on the outside of heat insulation reinforcing layer 3.

[0024] Heat insulation reinforcing layer 3 includes support base pipe 31, fixed installation groove 32, connecting heat insulation strip 33, buffer strip 34 and wrapping shell 35, and support base pipe 31 is fixedly installed on the outside of support pipeline 1, and the fixed installation groove 32 is opened on the surface of support base pipe 31;Connecting heat insulation strip 33 and buffer strip 34 are fixedly installed together, and are fixedly installed in the inside of fixed installation groove 32;The bottom surface of connecting heat insulation strip 33 is fixedly installed in the bottom of fixed installation groove 32, and the inner wall of wrapping shell 35 is fixedly installed on the outer surface of buffer strip 34.

[0025] Internal protective layer 2 is made of a transparent pipeline of perfluoroalkoxy resin, and the inner wall of internal protective layer 2 is provided with corrugation.

[0026] The support base pipe 31 in heat insulation reinforcing layer 3 is made of a nickel-based alloy metal pipe, and the fixed installation groove 32 is made of a whole spiral groove, and the connecting heat insulation strip 33 directly contacts with the fixed installation groove 32;Connecting heat insulation strip 33 is made of a whole aluminum metal strip, and connecting heat insulation strip 33 fills the fixed installation groove 32, and the buffer strip 34 is made of a whole aluminum silicate fiber strip;The buffer strip 34 protrudes from the surface of support base pipe 31, so that support base pipe 31 and wrapping shell 35 form two structures, one is buffer strip 34, and the other is the gap separated by buffer strip 34.

[0027] The outside protective shell 4 is made of a nickel-based alloy pipe, and the outside of the outside protective shell 4 is coated with a fluorocarbon corrosion-resistant coating;The outside protective shell 4 and heat insulation reinforcing layer 3 are installed at low temperature.

[0028] The corrosion-resistant high-temperature-resistant composite stainless steel pipe is mainly used for the delivery of high-temperature and corrosive medium, and its working principle involves the synergistic effect of multiple components to ensure its stability and high efficiency in extreme environment. The composite pipeline is mainly composed of support pipeline 1, internal protective layer 2, heat insulation reinforcing layer 3 and outside protective shell 4.

[0029] 1, support pipeline 1:

[0030] Support pipeline 1 provides structural support for the entire pipeline system, usually made of high-strength stainless steel material to ensure the safety of the pipeline in high-temperature and high-pressure environment. Its design has good mechanical strength and durability, which can withstand the pressure of fluid and the stress of external environment.

[0031] 2. Internal protective layer 2:

[0032] The internal protective layer 2 is made of transparent pipes made of perfluoroalkoxy resin, which has extremely high corrosion resistance. The corrugated structure on the inner wall can enhance the turbulence of the fluid and reduce the friction between the fluid and the pipe wall, thereby increasing the flow rate. This layer is fixedly installed on the inner wall of the support pipe 1 by adhesion, forming a tight protective barrier to effectively prevent the erosion of the support pipe by corrosive media.

[0033] 3. Thermal insulation and reinforcement layer 3:

[0034] The thermal insulation and reinforcement layer 3 is located on the outside of the support pipe 1, using nickel-based alloy as the support base pipe 31, and connecting the thermal insulation strip 33 and the buffer strip 34 through the fixed installation groove 32. The design of this layer not only provides excellent thermal insulation effect, but also effectively buffers the stress caused by temperature changes. The connection of the thermal insulation strip 33 and the buffer strip 34 together forms a multi-layer thermal insulation structure, which can significantly reduce heat conduction and maintain the temperature stability inside the pipe.

[0035] 4. Outer protective shell 4:

[0036] The outer protective shell 4 is made of nickel-based alloy pipe and coated with fluorocarbon corrosion-resistant coating, providing additional protection against external environmental corrosion and physical damage. It is installed under low temperature conditions to ensure tight coupling with the thermal insulation and reinforcement layer 3, preventing connection loosening due to thermal expansion and contraction. The outer protective shell 4 can effectively block external impact, chemical corrosion and high temperature influence, enhancing the safety of the overall pipeline system.

[0037] Work process

[0038] During the work process, when the high-temperature corrosive medium flows through the support pipe 1, the internal protective layer 2 immediately protects it from direct erosion of the medium to the support pipe. At the same time, the corrugated structure optimizes the flow state of the fluid, increasing the flow rate and ensuring efficient transportation.

[0039] The thermal insulation and reinforcement layer 3 effectively insulates the heat from the outside through its multi-layer structure, keeping the internal temperature of the pipe within the required range and avoiding the impact of high temperature on the support pipe 1. Finally, the outer protective shell 4 as the outermost protective layer provides additional protection, ensuring that the entire pipeline system can operate safely and stably in harsh environments.

[0040] Conclusion

[0041] The corrosion-resistant and high-temperature-resistant composite stainless steel pipe is designed in full consideration of the requirements of the working environment, and through the synergistic effect of the internal protective layer 2, the heat insulation and strengthening layer 3 and the outer protective shell 4, high-efficiency and safe conveying under the high-temperature and corrosive medium environment is realized. The working principle of the composite pipe system not only improves the durability and safety, but also improves the fluid conveying efficiency, and is suitable for wider industrial applications.

[0042] The technical scheme disclosed by the utility model, or the technical scheme inspired by the technical scheme of the utility model by the person skilled in the art, designs similar technical scheme, and achieves the above technical effect, which falls within the protection scope of the utility model.

Claims

1. A corrosion-resistant and high-temperature-resistant composite stainless steel pipe, characterized in that: It includes a supporting pipe (1), an inner protective layer (2), a heat insulation reinforcement layer (3) and an outer protective shell (4), wherein: the inner protective layer (2) is bonded and fixedly installed on the inner wall of the supporting pipe (1), and the heat insulation reinforcement layer (3) is fixedly installed on the outside of the supporting pipe (1), and the outer protective shell (4) is fixedly installed on the outside of the heat insulation reinforcement layer (3).

2. The corrosion-resistant and high-temperature-resistant composite stainless steel pipe as described in claim 1, characterized in that: The heat insulation reinforcement layer (3) includes a supporting base pipe (31), a fixed installation groove (32), a connecting heat insulation strip (33), a buffer strip (34), and a wrapping shell (35). The supporting base pipe (31) is fixedly installed on the outside of the supporting pipe (1), and the fixed installation groove (32) is opened on the surface of the supporting base pipe (31). The connecting heat insulation strip (33) and the buffer strip (34) are fixedly installed together and wrapped around the inside of the fixed installation groove (32). The bottom surface of the connecting heat insulation strip (33) is fixedly installed at the bottom of the fixed installation groove (32), and the inner wall of the wrapping shell (35) is fixedly installed on the outer surface of the buffer strip (34).

3. The corrosion-resistant and high-temperature-resistant composite stainless steel pipe as described in claim 1, characterized in that: The inner protective layer (2) is made of a transparent pipe made of perfluoroalkoxy resin, and the inner wall of the inner protective layer (2) is corrugated.

4. The corrosion-resistant and high-temperature-resistant composite stainless steel pipe as described in claim 2, characterized in that: The supporting base tube (31) inside the heat insulation reinforcement layer (3) is a nickel-based alloy metal tube, and the fixing installation groove (32) is a whole spiral groove. The connecting heat insulation strip (33) directly contacts the fixing installation groove (32). The connecting heat insulation strip (33) is a whole aluminum metal strip, and the connecting heat insulation strip (33) fills the fixing installation groove (32). The buffer strip (34) is a whole aluminum silicate fiber strip. The buffer strip (34) protrudes from the surface of the supporting base tube (31), so that two structures are formed between the supporting base tube (31) and the outer shell (35), one is the buffer strip (34), and the other is the gap separated by the buffer strip (34).

5. The corrosion-resistant and high-temperature-resistant composite stainless steel pipe as described in claim 1, characterized in that: The outer protective shell (4) is made of a nickel-based alloy tube, and the outer side of the outer protective shell (4) is coated with a fluorocarbon corrosion-resistant coating; the outer protective shell (4) and the heat insulation reinforcement layer (3) are installed at low temperature.

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