High-stiffness, thin-walled outer casing steel pipe for directly buried steam insulation pipe

Abstract

A high-stiffness, thin-walled outer casing steel pipe for a directly buried steam insulation pipe. The outer casing steel pipe comprises a steel pipe body. An adjustable anti-deformation mechanism is mounted on the steel pipe body. The adjustable anti-deformation mechanism comprises an I-beam. The I-beam is bent into a circular shape and hooped around the outside of the steel pipe body to form a closed ring, thereby improving the deformation resistance of the steel pipe body. A plurality of I-beam rings are uniformly arranged at specific intervals as required. In this way, even a thin-walled steel pipe body can exhibit ovalization resistance comparable to that of conventional thick-walled outer casing pipes.

Description

High-rigidity thin-walled direct-buried steam insulation pipe outer steel pipe Technical Field

[0001] This application relates to the field of thermal insulation pipe technology, and more specifically, to the outer steel pipe of a high-rigidity thin-walled direct-buried steam thermal insulation pipe. Background Technology

[0002] Precast direct-buried steam insulation pipes are widely used in urban heating systems for the efficient transmission of high-temperature steam. The use of steel outer casings has become a classic method for precast direct-buried steam insulation pipes. The outer steel casing protects the insulation material outside the steam pipe, preventing it from being soaked in groundwater and providing a stable and reliable space for the insulation material, thus preventing it from being squeezed by the soil.

[0003] The deeper the insulation pipe is buried underground, the greater the pressure exerted by the soil outside the casing on the steel casing. In addition to the pressure from the soil layer above the casing, the dynamic load caused by vehicles passing on the ground also threatens the stability of the steel casing. Therefore, the steel outer casing of the underground steam insulation pipe must have sufficient rigidity to resist the force from the top of the pipe, maintain its original shape, and prevent "instability".

[0004] For steel pipes with ordinary circular cross-sections, the only parameter to ensure their stability is the wall thickness of the steel pipe. The larger the diameter of the steel casing, the greater the wall thickness required to maintain shape stability. In the current direct-buried steam pipeline construction, the cost of the outer steel pipe accounts for the largest share of the material cost. Although this method is simple and direct, its economic disadvantages become increasingly apparent as the pipe size increases. Therefore, it is urgent to explore new technologies and methods to achieve a balance between cost and performance. Summary of the Invention

[0005] This application aims to at least address the technical problem of high cost caused by increasing deformation resistance through pipe wall thickness in existing technologies. To this end, this application proposes an outer steel pipe for a high-rigidity, thin-walled, directly buried steam insulation pipe.

[0006] The outer steel pipe of the high-rigidity thin-walled direct-buried steam insulation pipe according to the embodiments of this application includes a steel pipe body, and an adjustable anti-deformation mechanism is installed on the steel pipe body. The adjustable anti-deformation mechanism includes an I-beam, which is bent into a circle and clamped around the outside of the steel pipe body to form a closed ring, thereby improving the deformation resistance of the steel pipe body.

[0007] According to some embodiments of this application, the I-beam is provided with a plurality of evenly distributed portions on the outer side of the steel pipe body.

[0008] According to some embodiments of this application, the I-beam is fixed to the outside of the steel pipe body by welding.

[0009] According to some embodiments of this application, the surface of the I-beam is treated with anti-corrosion coating.

[0010] The beneficial effects of this application are: bending the I-beams into a circle and then hooping them around the outside of the steel pipe body to form a closed ring, and arranging several I-beam rings at certain intervals (evenly distributed) as needed, can achieve the ability to resist elliptical deformation of conventional pipe sleeves with thicker walls, even with a thinner-walled steel pipe body, which can significantly save steel and generate huge economic benefits.

[0011] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 shows the outer steel pipe of a high-rigidity thin-walled direct-buried steam insulation pipe according to an embodiment of this application.

[0014] A three-dimensional structural diagram of the overall structure;

[0015] Figure 2 is a cross-sectional plan view of an I-beam structure according to an embodiment of this application;

[0016] Figure 3 is a schematic diagram of an I-beam structure according to an embodiment of this application.

[0017] Reference numerals: 1. Steel pipe body; 2. I-beam. Detailed Implementation

[0018] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 this application and simplifying the description, and do not indicate or imply that the equipment 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 this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] The outer steel pipe of a high-rigidity thin-walled direct-buried steam insulation pipe according to an embodiment of this application is described below with reference to the accompanying drawings.

[0027] As shown in Figures 1-3, the outer steel pipe of the high-rigidity thin-walled direct-buried steam insulation pipe according to the embodiments of this application includes a steel pipe body 1. An adjustable anti-deformation mechanism is installed on the steel pipe body 1. The adjustable anti-deformation mechanism includes an I-beam 2, which is bent into a circle and clamped around the outside of the steel pipe body 1 to form a closed ring. The I-beam 2 can be fixed to the outside of the steel pipe body 1 by welding, bolting, or bonding. In this way, when using a thin-walled steel pipe body 1, it can also have the ability to resist elliptical deformation of a conventional sleeve with a thicker wall, while significantly saving steel and generating huge economic benefits.

[0028] Among them, several I-beams 2 are evenly distributed on the outside of the steel pipe body 1. The size and number of I-beams 2 are optimized according to the diameter of the steel pipe body 1 and the expected load to achieve the best stiffness enhancement effect.

[0029] The surface of the I-beam 2 is treated with an anti-corrosion coating to improve its corrosion resistance and extend its service life.

[0030] It is worth noting that various structural steels, such as I-beams, channel steels, and angle steels, are widely used in engineering. Due to their special shapes, these structural steels have a much higher resistance to deformation compared to conventional steel plates. For example, the moment of inertia of a No. 14 I-beam about its central axis is 5.95*10-6 m4. A steel plate of the same length, width, and weight, made of the same material, has a moment of inertia of only 5.2*10-8 m4. The ratio of their moments of inertia is 113.8 to 1. The product of the elastic modulus E of the steel and the moment of inertia I of the steel component constitutes the stiffness of the component. Based on the above principle, combining I-beams with ordinary steel pipes should significantly improve the deformation resistance of the steel pipes.

[0031] The present invention is implemented as shown in Figures 1 and 2, by bending the I-beam 2 into a circle and then hooping it around the outside of the steel pipe body 1 to form a closed ring. As needed, several I-beam rings are arranged (evenly distributed) at certain intervals. In this way, even with a relatively thin-walled steel pipe body 1, it can still have the ability to resist elliptical deformation of a conventional pipe wall with a relatively thick wall.

[0032] The present invention can also use channel steel, angle steel, ring plate, ring pipe and round steel to enhance the rigidity of the steel pipe body 1 steel sleeve.

[0033] The above are merely embodiments of this application and are not intended to limit the scope of protection of 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 scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. The outer steel pipe of a high-rigidity thin-walled direct-buried steam insulation pipe, characterized in that, The steel pipe body (1) is equipped with an adjustable anti-deformation mechanism. The adjustable anti-deformation mechanism includes an I-beam (2), which is bent into a circle and wrapped around the outside of the steel pipe body (1) to form a closed ring, thereby improving the anti-deformation ability of the steel pipe body (1).

2. The outer steel pipe of the high-rigidity thin-walled direct-buried steam insulation pipe according to claim 1, characterized in that, The I-beam (2) has several evenly distributed segments on the outside of the steel pipe body (1).

3. The outer steel pipe of the high-rigidity thin-walled direct-buried steam insulation pipe according to claim 2, characterized in that, The I-beam (2) is fixed to the outside of the steel pipe body (1) by welding.

4. The outer steel pipe of the high-rigidity thin-walled direct-buried steam insulation pipe according to claim 3, characterized in that, The surface of the I-beam (2) is treated with anti-corrosion coating.

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