Corrosion-resistant and wear-resistant composite stainless steel pipe for nuclear power station
By designing a multi-layered composite structure and materials, the problem of insufficient corrosion resistance and wear resistance of nuclear power plant pipelines in highly corrosive environments has been solved, thereby improving reliability and safety under high temperature and high pressure conditions.
Patent Information
- Application Number
- CN202423316830.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing nuclear power plant pipelines are subject to high corrosion and high pressure environments, resulting in poor corrosion resistance, insufficient wear resistance, and difficult maintenance. Traditional protective structures are easily damaged and complex and expensive to repair.
The corrosion-resistant and wear-resistant composite stainless steel pipe for nuclear power plants adopts a multi-layered composite structure, including corrosion-resistant reinforced pipe, flexible protective cover, sealed flexible wrapping and protective shell. It combines materials such as stainless steel, carbon steel and titanium alloy, and is designed with a multi-layered structure to enhance corrosion resistance and wear resistance, and provides additional protection through flexible protective cover and sealing design.
It effectively improves the corrosion resistance and wear resistance of pipelines, reduces failure rate and maintenance costs, enhances reliability and safety in high temperature and high pressure environments, and extends service life.
Smart Images
Figure CN223677366U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to nuclear power plant pipeline technical field especially relates to a kind of corrosion-resistant wear-resistant composite stainless steel pipe for nuclear power plant. BACKGROUND
[0002] With the rapid development of modern industrial technology, especially in nuclear energy, chemical industry and ocean engineering, etc. High corrosive, high pressure environment, the requirement of pipeline and its protective material is higher and higher, nuclear power plant as highly sensitive and high-risk facilities, its pipeline system bears a large amount of transmission and cooling work, these pipes usually need to withstand extreme environmental pressure, temperature and corrosive medium, traditional pipeline protection technology often has some shortcomings, it is difficult to meet the increasingly severe use demand.
[0003] Most of the pipeline protection technology in the current market mainly relies on the external protection measures of single material, such as coating, wrapping film or rigid shell. These technologies can provide corrosion protection to some extent, but often have the following limitations:
[0004] Poor corrosion resistance: single external coating or wrapping film is easily affected by external environment during long-term use and loses protection effect, which cannot provide sufficient long-term protection.
[0005] Insufficient wear resistance: traditional protection structure is usually rigid, which cannot effectively cope with the thermal expansion, vibration and other movements of the pipeline, resulting in a significant reduction in protection effect and easy wear or aging.
[0006] Maintenance difficulty: once the traditional protection structure is damaged or corroded, repair and replacement work is usually complex and costly, in addition, single-layer protection design lacks effective maintainability and repair scheme when the pipeline fails.
[0007] Therefore, it is necessary to invent a corrosion-resistant and wear-resistant composite stainless steel pipe for nuclear power plant. SUMMARY
[0008] In order to solve the above technical problems, the utility model provides a kind of corrosion-resistant and wear-resistant composite stainless steel pipe for nuclear power plant, to solve the problem that the existing nuclear power plant pipeline still has poor corrosion resistance, insufficient wear resistance and maintenance difficulty. A kind of corrosion-resistant and wear-resistant composite stainless steel pipe for nuclear power plant, including corrosion-resistant reinforced pipe, flexible protective cover, sealing flexible wrapping, protective shell and shell connecting frame, wherein: flexible protective cover is wound on the outside of corrosion-resistant reinforced pipe, and sealing flexible wrapping is wrapped on the outside of corrosion-resistant reinforced pipe and flexible protective cover, and the protective shell is wrapped on the outside of sealing flexible wrapping;The protective shell is combined by shell connecting frame and bolt.
[0009] The anticorrosion reinforced pipe comprises an intermediate support layer, a mounting sliding groove, a sliding block, a pressure bearing reinforced layer and a medium contact layer, the mounting sliding groove is arranged on the outer side of the intermediate support layer, and the sliding block is fixedly arranged on the inner wall of the pressure bearing reinforced layer; the pressure bearing reinforced layer is installed on the outer side of the intermediate support layer by sliding into the mounting sliding groove through the sliding block; and the medium contact layer is fixedly arranged on the inner wall of the intermediate support layer.
[0010] The flexible protective cover comprises a flexible wrapping pad, a connecting non-slip surface and a reinforcing rib, the connecting non-slip surface is fixedly arranged on the bottom of the flexible wrapping pad, and the reinforcing rib is fixedly arranged in the flexible wrapping pad.
[0011] The intermediate support layer in the anticorrosion reinforced pipe is a stainless steel pipe, and the mounting sliding groove on the outer side of the intermediate support layer is at least four groups; the pressure bearing reinforced layer is a carbon steel pipe, and the number and position of the sliding blocks on the inner wall of the pressure bearing reinforced layer are matched with the mounting sliding groove; and the medium contact layer is a titanium alloy pipe, which has the following effects: ① anticorrosion effect: the anticorrosion reinforced pipe is mainly used for enhancing corrosion resistance, and the inner and outer layers thereof can effectively resist the corrosion of chemical media, and is particularly suitable for high corrosion environments such as nuclear power plants, in which the pipe is often exposed to high temperature, high pressure and corrosive gas and liquid, and therefore needs to have strong corrosion resistance, the anticorrosion reinforced pipe is designed in view of the requirement, and ensures long-term stable operation of the pipe; ② structural reinforcement: the anticorrosion reinforced pipe adopts a multi-layer structure, such as the intermediate support layer and the pressure bearing reinforced layer, and the support layer and the reinforced layer play a role in enhancing the mechanical strength of the pipe, and in particular can prevent the pipe from being broken or deformed when bearing external pressure and internal medium pressure; ③ improvement of wear resistance: in addition to the anticorrosion function, the anticorrosion reinforced pipe also has wear resistance, and the design thereof can avoid wear due to fluid friction or external force during long-term use, so as to maintain the normal function of the pipe.
[0012] The flexible wrapping pad inside the flexible protective cover adopts a high-density sponge pad with a rectangular cross section, and a layer of silica gel pad is adopted for connecting the non-slip surface, and the reinforcing rib adopts at least three steel wires; when the flexible protective cover is wrapped outside the anticorrosive reinforced pipe, gaps exist between the flexible protective covers, and the following effects are achieved, ① protection effect: the flexible protective cover mainly protects the internal structure of the pipe from damage from the external environment, it is wrapped outside the anticorrosive reinforced pipe, and can effectively prevent damage to the pipe caused by external mechanical impact, friction or other physical factors, especially in harsh environments such as nuclear power plants, the pipe is often exposed to high temperature, high pressure or vibration, the flexible protective cover protects the surface of the pipe and prolongs the service life of the pipe; ② elasticity and adaptability: since the material of the flexible protective cover usually has a certain elasticity, it can adapt to the changes of the pipe and different pressures of the external environment, prevent damage caused by external impact and pressure, and the flexibility enables the protective cover to maintain effective protection when the pipe is deformed due to thermal expansion and contraction, vibration and the like; ③ slow down heat conduction: in some cases, the flexible protective cover can also play a certain heat insulation role, slow down heat exchange between the pipe and the external environment, especially when working in a high-temperature environment, the heat conduction can be effectively slowed down, and the pipe material is protected from high temperature.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] The anticorrosive reinforced pipe has the following effects, ① anticorrosion effect: the anticorrosive reinforced pipe is mainly used for enhancing corrosion resistance, and the inner and outer layers thereof can effectively resist the corrosion of chemical media, and is especially suitable for high-corrosion environments such as nuclear power plants, in such environments, the pipe is often exposed to high temperature, high pressure and corrosive gas and liquid, and therefore needs to have strong corrosion resistance, and the anticorrosive reinforced pipe is designed under such demand to ensure long-term stable operation of the pipe; ② structural reinforcement: the anticorrosive reinforced pipe adopts a multi-layer structure, such as a middle support layer and a pressure-bearing reinforcing layer, wherein the support layer and the reinforcing layer play a role in enhancing the mechanical strength of the pipe, and especially when external pressure and internal medium pressure are borne, the pipe can be prevented from being broken or deformed; ③ improve wear resistance: in addition to the anticorrosion function, the anticorrosive reinforced pipe also has wear resistance, and its design can avoid wear due to fluid friction or external force during long-term use, so as to maintain the normal function of the pipe.
[0015] The flexible protective cover has the following effects: ① protection effect: the flexible protective cover mainly protects the internal structure of the pipeline from damage by external environment, is wrapped outside the anticorrosive reinforced pipe, can effectively prevent external mechanical impact, friction or other physical factors from causing damage to the pipeline, especially in harsh environments such as nuclear power plants, the pipeline is often exposed to high temperature, high pressure or vibration, the flexible protective cover protects the surface of the pipeline and prolongs the service life of the pipeline; ② elasticity and adaptability: the material of the flexible protective cover usually has a certain elasticity, can adapt to the changes of the pipeline and different pressures of the external environment, prevents damage caused by external impact and pressure, and the flexibility of the flexible protective cover enables the protective cover to maintain effective protection when the pipeline is deformed due to thermal expansion and contraction, vibration and the like; ③ slow down heat conduction: in some cases, the flexible protective cover can also have a certain heat insulation effect, slow down heat exchange between the pipeline and the external environment, especially when working in a high-temperature environment, can effectively slow down heat conduction and protect the pipeline material from high temperature. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a structural schematic view of the utility model.
[0017] Figure 2 is an enlarged view of A of the utility model.
[0018] Figure 3 is an enlarged view of B of the utility model.
[0019] In the drawings:
[0020] Anticorrosive reinforced pipe 1, middle support layer 11, installation sliding groove 12, sliding block 13, pressure bearing reinforcing layer 14, medium contact layer 15, flexible protective cover 2, flexible wrapping pad 21, connecting non-slip surface 22, reinforcing rib 23, sealing flexible wrapping 3, protective shell 4, shell connecting frame 5. 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 clearly and completely described below, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. 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 protection scope of the utility model.
[0022] As shown in the accompanying Figure 1 to the accompanying Figure 3 .
[0023] The utility model provides a kind of corrosion -resistant wear -resistant composite stainless steel pipe for nuclear power plant, including corrosion -resistant reinforcing pipe 1, flexible protective cover 2, sealing flexible package 3, protective shell 4 and shell connecting frame 5, wherein: flexible protective cover 2 is wound in the outside of corrosion -resistant reinforcing pipe 1, and sealing flexible package 3 is wrapped in the outside of corrosion -resistant reinforcing pipe 1 and flexible protective cover 2, the protective shell 4 is wrapped in the outside of sealing flexible package 3;The protective shell 4 is combined by shell connecting frame 5 and bolt.
[0024] Corrosion -resistant reinforcing pipe 1 includes intermediate support layer 11, installation sliding groove 12, sliding block 13, pressure -resistant reinforcing layer 14 and medium contact layer 15, and installation sliding groove 12 is opened in the outside of intermediate support layer 11, and the inner wall of pressure -resistant reinforcing layer 14 is fixedly installed with sliding block 13;The pressure -resistant reinforcing layer 14 is installed in the outside of intermediate support layer 11 by sliding into installation sliding groove 12 in sliding block 13;Medium contact layer 15 is fixedly installed on the inner wall of intermediate support layer 11.
[0025] Flexible protective cover 2 includes flexible wrapping pad 21, connecting nonskid surface 22 and reinforcing rib 23, and connecting nonskid surface 22 is fixedly installed at the bottom of flexible wrapping pad 21, and reinforcing rib 23 is fixedly installed in flexible wrapping pad 21.
[0026] The intermediate support layer 11 in the corrosion -resistant reinforcing pipe 1 is a stainless steel pipe, and the installation sliding groove 12 on the outside of the intermediate support layer 11 is at least 4 groups;The pressure -resistant reinforcing layer 14 is a carbon steel pipe, and the number and position of the sliding block 13 on the inner wall of the pressure -resistant reinforcing layer 14 match the installation sliding groove 12;The medium contact layer 15 is a titanium alloy pipe.
[0027] The flexible wrapping pad 21 in the flexible protective cover 2 is a high-density sponge pad with a rectangular cross section, and the connecting nonskid surface 22 is a layer of silicone pad, and the reinforcing rib 23 is at least three steel wires;When the flexible protective cover 2 is wrapped around the corrosion -resistant reinforcing pipe 1, there is a gap between the flexible protective covers 2.
[0028] Compared with the prior art, the device has the following advantages:
[0029] 1. Multi-layer composite structure, enhanced protection performance
[0030] The device adopts a multi-layer composite structure of corrosion -resistant reinforcing pipe 1, flexible protective cover 2, sealing flexible package 3, protective shell 4, etc., which makes the device have more comprehensive protection performance. Compared with the traditional single protective layer, the multi-layer structure of the device can effectively resist external physical damage, chemical corrosion and environmental factors, thereby prolonging the service life of the device and reducing the failure rate.
[0031] 2. Improved corrosion resistance and wear resistance
[0032] The anti-corrosion reinforced pipe 1 in the device adopts high-performance materials, which can operate stably in extreme corrosive environments for a long time. This corrosion resistance is superior to many existing technologies, especially in high-corrosion environments such as nuclear power plants, which can significantly improve the reliability and safety of the pipeline. In addition, the design of the anti-corrosion reinforced pipe combines the intermediate support layer 11 and the pressure-bearing reinforcement layer 14, making the device have good wear resistance and pressure resistance.
[0033] 3. Unique design of flexible protective cover
[0034] The flexible protective cover 2 adopts a flexible material design that can effectively wrap around the outside of the anti-corrosion reinforced pipe 1, providing additional physical protection for the pipeline. Compared with traditional rigid protective devices, the flexible protective cover 2 can adapt to the thermal expansion, vibration and other deformations of the pipeline, making the protection effect more reliable. In addition, the flexible protective cover also combines the anti-slip surface 22 and the reinforcing rib 23, enhancing its wear resistance and impact resistance, further improving the safety of the device.
[0035] 4. Intelligent sealing design, reducing leakage risk
[0036] The device adopts a sealing flexible wrap 3, which is closely combined with the flexible protective cover 2 and the anti-corrosion reinforced pipe 1, forming an efficient sealing structure that effectively prevents the leakage of external pollutants or media, ensuring the sealing and stability of the system. This sealing design not only improves the safety of the device, but also reduces maintenance costs and risks, which is particularly important in high-risk environments.
[0037] 5. Structure optimization, reducing volume and weight
[0038] The multi-layer composite design of the device not only ensures high-strength protection, but also optimizes the structure to reduce the volume and weight of the device. Compared with traditional heavy protective structures, this device uses high-strength lightweight materials and reasonable structural layout, effectively reducing the difficulty of installation and maintenance.
[0039] 6. Adapt to complex working conditions, enhance reliability
[0040] The device design takes into account the special needs of complex working conditions such as nuclear power plants, and can work stably in extreme environments such as high temperature, high pressure, and strong corrosion. Its multi-layer structure, flexible design, and corrosion-resistant, wear-resistant characteristics make the device better cope with harsh working conditions, improving the reliability and service life of the system.
[0041] 7. Improved maintainability
[0042] The design of the flexible protective cover 2 and the sealed flexible package 3 makes the device more maintainable. In the event of a malfunction, the various layers of the device can be more easily inspected and maintained, reducing repair costs and device downtime.
[0043] 8. Comprehensive safety improvement
[0044] Through the optimized design of the housing connecting frame 5, the external protective layer of the device, such as the protective shell 4, is more stable, effectively preventing external impact and deformation of the device, thereby improving the anti-external interference ability of the device and enhancing the overall safety.
[0045] Summary:
[0046] The advantages of the present device over the prior art lie in its multi-layer composite protection design, excellent corrosion and wear resistance, flexible adaptability of the flexible protective cover, and enhanced sealing and maintainability. These advantages enable the device to better cope with harsh working conditions in complex nuclear power plant environments, improving safety, reliability, and service life, thereby reducing failure rates and maintenance costs.
[0047] Any similar technical solution that achieves the above technical effects, designed by using the technical solution of the present utility model or inspired by the technical solution of the present utility model, falls within the protection scope of the present utility model.
Claims
1. A corrosion and abrasion resistant composite stainless steel pipe for nuclear power plants, characterized by: It include anticorrosion reinforced pipe (1), flexible protective cover (2), sealed flexible package (3), protective shell (4) and shell connecting frame (5), wherein: flexible protective cover (2) is wrapped on the outside of anticorrosion reinforced pipe (1), and sealed flexible package (3) is wrapped on the outside of anticorrosion reinforced pipe (1) and flexible protective cover (2), and the protective shell (4) is wrapped on the outside of sealed flexible package (3); the protective shell (4) is combined by shell connecting frame (5) and bolt.
2. The corrosion and wear resistant composite stainless steel pipe for nuclear power plants according to claim 1, characterized in that: The anticorrosion reinforced pipe (1) includes an intermediate support layer (11), a mounting sliding groove (12), a sliding block (13), a pressure bearing reinforcing layer (14) and a medium contact layer (15), and the mounting sliding groove (12) is provided on the outside of the intermediate support layer (11), and the pressure bearing reinforcing layer (14) is fixedly installed with the sliding block (13) on the inner wall; the pressure bearing reinforcing layer (14) is installed on the outside of the intermediate support layer (11) by sliding into the mounting sliding groove (12) through the sliding block (13); and the medium contact layer (15) is fixedly installed on the inner wall of the intermediate support layer (11).
3. The corrosion and wear resistant composite stainless steel pipe for nuclear power plants according to claim 1, characterized in that: The flexible protective cover (2) includes a flexible wrapping pad (21), a connecting non-slip surface (22) and a reinforcing rib (23), the connecting non-slip surface (22) is fixedly installed on the bottom of the flexible wrapping pad (21), and the reinforcing rib (23) is fixedly installed on the inside of the flexible wrapping pad (21).
4. A corrosion and wear resistant composite stainless steel pipe for nuclear power plants according to claim 2, characterized in that: The intermediate support layer (11) in the anticorrosion reinforced pipe (1) is a stainless steel pipe, and the mounting sliding groove (12) on the outside of the intermediate support layer (11) is at least 4 groups; the pressure bearing reinforcing layer (14) is a carbon steel metal pipe, and the number and position of the sliding block (13) on the inner wall of the pressure bearing reinforcing layer (14) are matched with the mounting sliding groove (12); and the medium contact layer (15) is a titanium alloy pipe.
5. The corrosion and wear resistant composite stainless steel pipe for nuclear power plants according to claim 3, characterized in that: The flexible wrapping pad (21) in the flexible protective cover (2) is a high-density sponge pad with a rectangular cross section, the connecting non-slip surface (22) is a layer of silica gel pad, and the reinforcing rib (23) is at least three steel wires; when the flexible protective cover (2) is wrapped on the outside of the anticorrosion reinforced pipe (1), there is a gap between the flexible protective covers (2).