Low-temperature-resistant wear-resistant composite stainless steel seamless steel pipe for

Abstract

The utility model provides a low-temperature-resistant wear-resistant composite stainless steel seamless steel tube for spaceflight, which comprises a composite layer seamless steel tube main body, a plurality of partition plates are arranged in the composite layer seamless steel tube main body, a vacuum cavity is formed among the plurality of partition plates, and a temperature sensor is arranged on each partition plate; the outer surface of the composite layer seamless steel pipe body is connected with the anti-abrasion sleeve in a composite mode, and a spiral ring groove is formed in the surface of the anti-abrasion sleeve. The utility model effectively isolates the influence of external low temperature, and obviously improves the low temperature resistance of the steel pipe. The vacuum cavity reduces heat conduction, maintains stable fluid temperature, and guarantees spaceflight fluid transmission. The temperature sensor monitors the temperature in real time, supports self-adaptive heat management, accurately controls the fluid temperature, and improves the energy efficiency. The wear-resistant sleeve and the low-temperature-resistant coating enhance the wear resistance and prolong the service life. The spiral ring groove design improves the roughness, reduces fluid impact, and further improves the wear-resisting effect.

Description

Technical Field

[0001] This utility model belongs to the field of steel pipe technology, and in particular relates to a low-temperature resistant and wear-resistant composite stainless steel seamless steel pipe for aerospace applications. Background Technology

[0002] In the aerospace field, seamless steel pipes, as critical components, must withstand harsh environments such as extreme low temperatures, high-intensity pressure, and long-term wear. While traditional stainless steel seamless pipes meet basic requirements to some extent, their low-temperature resistance, wear resistance, and heat exchange efficiency still need improvement. Particularly in spacecraft propulsion, cooling, and fuel delivery systems, the performance of seamless steel pipes directly affects the safety and reliability of the entire space mission.

[0003] Existing seamless steel pipe designs often use a single material, making it difficult to simultaneously meet the requirements of low-temperature resistance, high strength, and wear resistance. Furthermore, traditional designs have shortcomings in thermal management, leading to low energy efficiency. Therefore, there is an urgent need for a new type of aerospace-grade low-temperature resistant and wear-resistant composite stainless steel seamless pipe to improve its overall performance and meet the stringent requirements of the aerospace field.

[0004] Therefore, it is essential to invent a low-temperature resistant and wear-resistant composite stainless steel seamless pipe for aerospace applications. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides aerospace-grade low-temperature resistant and wear-resistant composite stainless steel seamless pipe, comprising a composite seamless pipe body, partition discs, a vacuum chamber, a temperature sensor, an anti-wear sleeve, and a spiral annular groove. The composite seamless pipe body contains several partition discs, forming the vacuum chamber between them. Each partition disc is equipped with a temperature sensor. The anti-wear sleeve is compositely connected to the outer surface of the composite seamless pipe body, and the surface of the anti-wear sleeve is provided with a spiral annular groove.

[0006] Preferably, the composite seamless steel pipe body includes an outer steel pipe layer, a middle steel pipe layer, and an inner steel pipe layer, wherein the middle steel pipe layer is metallurgically bonded to the inside of the outer steel pipe layer, and the inner steel pipe layer is metallurgically bonded to the inside of the middle steel pipe layer.

[0007] Preferably, several partition plates are arranged horizontally inside the outer layer of the steel pipe, forming numerous independent vacuum chambers inside. Temperature sensors are installed on the partition plates to monitor the vacuum chambers at corresponding locations and the surrounding temperature.

[0008] Preferably, the outer layer of the steel pipe and the wear-resistant sleeve are both made of low-temperature resistant, high-strength and wear-resistant materials, the middle layer of the steel pipe inside the outer layer of the steel pipe is made of different alloys or composite materials, and the inner layer of the steel pipe inside the middle layer of the steel pipe is made of high-strength and corrosion-resistant stainless steel.

[0009] Preferably, the wear-resistant sleeve is provided with a spiral annular groove on the outside along the axial direction of the seamless steel pipe body of the composite layer, and the surface of the wear-resistant sleeve is coated with a low-temperature resistant coating.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This invention effectively isolates the external low-temperature environment from the direct influence of the fluid inside the steel pipe by employing a steel pipe outer layer made of low-temperature resistant material and an anti-wear sleeve, along with a carefully designed internal vacuum chamber structure, thus significantly improving the low-temperature resistance of the steel pipe. The vacuum chamber design not only reduces heat conduction but also helps maintain a stable temperature of the fluid inside the steel pipe, providing reliable protection for fluid transport in aerospace missions. Simultaneously, temperature sensors on the partition plate can monitor the temperature of the vacuum chamber and its surrounding environment in real time, providing precise data support for the adaptive thermal management system. By flexibly adjusting heating or cooling strategies, precise control of the fluid temperature inside the steel pipe is achieved, further improving energy efficiency.

[0012] This invention features a specially designed anti-wear sleeve coated with a low-temperature resistant paint, significantly enhancing the wear resistance of the steel pipe and extending its service life. Furthermore, the ingenious design of the spiral groove not only increases the surface roughness of the steel pipe and expands the contact area with the external environment, but also effectively reduces the direct impact of external fluids on the pipe surface by guiding fluid flow, further improving wear resistance. Simultaneously, the composite seamless steel pipe body design, through metallurgical integration of different materials such as high-strength, low-temperature resistant, and corrosion-resistant materials, achieves comprehensive optimization of the steel pipe's performance. This not only improves the overall structural strength of the steel pipe but also significantly enhances its corrosion resistance, providing a solid guarantee for the safety and reliability of aerospace missions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the layered structure of this utility model.

[0014] Figure 2 This is a utility model Figure 1 A schematic diagram of a half-section structure.

[0015] In the picture:

[0016] Composite seamless steel pipe body 1, outer layer of steel pipe 11, middle layer of steel pipe 12, inner layer of steel pipe 13, partition plate 2, vacuum chamber 3, temperature sensor 4, wear-resistant sleeve 5, spiral annular groove 6. Detailed Implementation

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

[0018] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0019] As attached Figure 1 To be continued Figure 2 As shown:

[0020] The aerospace-grade low-temperature resistant and wear-resistant composite stainless steel seamless pipe provided by this utility model includes a composite seamless steel pipe body 1, partition discs 2, a vacuum chamber 3, a temperature sensor 4, an anti-wear sleeve 5, and a spiral annular groove 6. The composite seamless steel pipe body 1 has a plurality of partition discs 2 inside, and the vacuum chamber 3 is formed between the plurality of partition discs 2. A temperature sensor 4 is installed on each partition disc 2. The anti-wear sleeve 5 is compositely connected to the outer surface of the composite seamless steel pipe body 1, and the surface of the anti-wear sleeve 5 is provided with a spiral annular groove 6.

[0021] Furthermore, the composite seamless steel pipe body 1 adopts an advanced multi-layer composite design, including an outer steel pipe layer 11, a middle steel pipe layer 12, and an inner steel pipe layer 13. These three layers are tightly connected through metallurgical bonding, forming a robust and durable whole. The outer steel pipe layer 11, as the outermost layer, directly faces the external environment and needs to withstand various external pressures and wear; the middle steel pipe layer 12 plays a transition and buffering role, further enhancing the strength and toughness of the steel pipe; while the inner steel pipe layer 13 is in direct contact with the fluid and needs to have good corrosion resistance and smoothness to ensure smooth fluid transmission.

[0022] Furthermore, several partition plates 2 are horizontally arranged inside the outer layer 11 of the steel pipe, dividing the interior of the steel pipe into numerous independent vacuum chambers 3. The design of the vacuum chambers 3 not only reduces heat conduction and improves the thermal insulation performance of the steel pipe, but also effectively isolates the external low-temperature environment from the influence of the fluid inside the steel pipe. In addition, each partition plate 2 is equipped with a temperature sensor 4 to monitor the temperature of the corresponding vacuum chamber 3 and its surroundings in real time. This design allows the steel pipe to automatically adjust its thermal management strategy according to changes in ambient temperature, ensuring a stable internal fluid temperature.

[0023] Furthermore, to further enhance the low-temperature resistance and wear resistance of the steel pipe, both the outer layer 11 and the wear-resistant sleeve 5 are made of low-temperature resistant, high-strength, and wear-resistant materials. These materials not only possess good low-temperature toughness, maintaining stable mechanical properties in extreme low-temperature environments, but also exhibit excellent wear resistance, resisting the wear of the steel pipe by fluids and the external environment. Simultaneously, the intermediate layer 12 is made of different alloys or composite materials; the selection of these materials aims to further enhance the overall strength and toughness of the steel pipe, improving its pressure-bearing capacity and service life.

[0024] Furthermore, the wear-resistant sleeve 5, serving as a protective layer on the outside of the steel pipe, has spiral annular grooves 6 formed along the axial direction of the seamless steel pipe body 1. The design of the spiral annular grooves 6 not only improves the roughness of the outer surface of the steel pipe and increases the contact area with the external environment, but also guides fluid flow, reducing the direct impact of fluid on the steel pipe surface, thereby extending the service life of the steel pipe. In addition, the surface of the wear-resistant sleeve 5 is coated with a low-temperature resistant coating, further enhancing its low-temperature resistance and wear resistance. This design enables the steel pipe to maintain excellent wear resistance even in extreme low-temperature environments, providing strong protection for the safety and reliability of aerospace missions.

[0025] Detailed Production Process

[0026] I. Raw Material Preparation

[0027] Material of outer layer 11 of steel pipe: Select alloy material with low temperature resistance, high strength and wear resistance to ensure that outer layer 11 of steel pipe can directly face the external environment and withstand various external pressures and wear.

[0028] Material of intermediate layer 12 of steel pipe: According to design requirements, different alloys or composite materials are selected as the material of intermediate layer 12 of steel pipe to enhance the overall strength and toughness of steel pipe, improve pressure bearing capacity and service life.

[0029] The inner layer 13 of the steel pipe is made of high-strength, corrosion-resistant stainless steel to ensure that the inner layer 13 of the steel pipe can maintain good corrosion resistance and smoothness when in contact with fluid, thus ensuring smooth fluid transmission.

[0030] Partition plate 2 material: High temperature resistant, high strength and corrosion resistant material is selected for the manufacture of partition plate 2 to ensure that it can work stably inside the steel pipe and withstand fluid pressure and temperature changes.

[0031] Wear-resistant sleeve 5 material: The same low-temperature resistant, high-strength and wear-resistant material is selected to make wear-resistant sleeve 5 to protect the outer layer of the steel pipe from wear by the external environment.

[0032] II. Manufacturing of the Composite Layer Seamless Steel Pipe Body 1

[0033] Three-layer metallurgical bonding: The outer layer 11, the middle layer 12, and the inner layer 13 of the steel pipe are tightly connected together through metallurgical bonding. This step needs to be carried out at high temperature to ensure that the three layers of materials can be fully fused to form a strong and durable whole.

[0034] Steel pipe forming: The three-layer composite structure is processed into the required steel pipe shape and size through the manufacturing process of seamless steel pipe.

[0035] Internal processing: The inside of the steel pipe is cleaned and treated as necessary to ensure that it is smooth and free of impurities, in preparation for the subsequent installation of the partition plate 2 and the formation of the vacuum chamber 3.

[0036] III. Installation of partition plate 2 and vacuum chamber 3

[0037] Partition plate 2 installation: Several partition plates 2 are horizontally arranged inside the steel pipe according to the design requirements. These partition plates 2 need to be installed precisely to ensure that the spacing and position between them meet the design requirements.

[0038] Vacuum chamber 3 formation: By installing the partition plate 2, the interior of the steel pipe is divided into numerous independent vacuum chambers 3. This step needs to be carried out in an oxygen-free environment to avoid residual oxygen or other gases inside the vacuum chambers 3.

[0039] Temperature sensor installation: Temperature sensor 4 is installed on each partition plate to monitor the temperature of the vacuum chamber and its surroundings in real time.

[0040] IV. Machining of the wear-resistant sleeve 5 and the spiral annular groove 6

[0041] Wear-resistant sleeve manufacturing: Wear-resistant sleeves are manufactured using selected low-temperature resistant, high-strength, and wear-resistant materials according to design requirements.

[0042] Spiral annular groove 6 is formed on the surface of the wear-resistant sleeve 5 along the axial direction of the composite seamless steel pipe body 1. This step requires precise control of the depth, width, and spacing of the spiral annular groove 6 to ensure that it can achieve the expected wear resistance effect.

[0043] Low-temperature resistant coating: Apply low-temperature resistant coating to the surface of the wear-resistant sleeve 5 to further enhance its low-temperature resistance and wear resistance.

[0044] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A low-temperature resistant and wear-resistant composite stainless steel seamless pipe for aerospace applications, characterized in that... The system includes a composite seamless steel pipe body (1), partition discs (2), a vacuum chamber (3), a temperature sensor (4), an anti-wear sleeve (5), and a spiral annular groove (6). The composite seamless steel pipe body (1) has several partition discs (2) inside, and the vacuum chamber (3) is formed between the partition discs (2). A temperature sensor (4) is installed on each partition disc (2). The anti-wear sleeve (5) is compositely connected to the outer surface of the composite seamless steel pipe body (1), and the surface of the anti-wear sleeve (5) is provided with a spiral annular groove (6).

2. The aerospace-grade low-temperature resistant and wear-resistant composite stainless steel seamless pipe as described in claim 1, characterized in that: The composite seamless steel pipe body (1) includes an outer steel pipe layer (11), a middle steel pipe layer (12), and an inner steel pipe layer (13). The middle steel pipe layer (12) is metallurgically bonded inside the outer steel pipe layer (11), and the inner steel pipe layer (13) is metallurgically bonded inside the middle steel pipe layer (12).

3. The aerospace-grade low-temperature resistant and wear-resistant composite stainless steel seamless pipe as described in claim 2, characterized in that: The outer layer (11) of the steel pipe has several partition plates (2) arranged horizontally inside, forming numerous independent vacuum chambers (3) inside. Temperature sensors (4) are installed on the partition plates (2) to monitor the vacuum chambers (3) at the corresponding positions and the surrounding temperature.

4. The aerospace-grade low-temperature resistant and wear-resistant composite stainless steel seamless pipe as described in claim 3, characterized in that: The outer layer (11) of the steel pipe and the wear-resistant sleeve (5) are both made of low-temperature resistant, high-strength and wear-resistant materials. The middle layer (12) of the steel pipe inside the outer layer (11) is made of different alloys or composite materials. The inner layer (13) of the steel pipe inside the middle layer (12) is made of high-strength and corrosion-resistant stainless steel.

5. The aerospace-grade low-temperature resistant and wear-resistant composite stainless steel seamless pipe as described in claim 4, characterized in that: The wear-resistant sleeve (5) is provided with a spiral annular groove (6) opened along the axial direction of the composite seamless steel pipe body (1) on the outside, and the surface of the wear-resistant sleeve (5) is coated with a low-temperature resistant coating.

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