Compression-resistant steel pipe

Abstract

The utility model relates to the technical field of steel pipes, and discloses a compression-resistant steel pipe which comprises an outer sleeve shell and an inner pipe body, a filling layer is fixedly arranged outside the inner pipe body, an inner sleeve shell is fixedly arranged outside the filling layer, a plurality of elastic pieces are fixedly arranged outside the inner sleeve shell, and a plurality of V-shaped plates are fixedly arranged inside the outer sleeve shell. In the utility model, the V-shaped plate structure in the outer sleeve shell disperses the pressure into component forces in multiple directions, so that the stress concentration is effectively avoided, the stability of the whole structure is enhanced, the steel pipe is not easy to locally deform or damage when bearing larger pressure, the reliability of the steel pipe under various working conditions is improved, and the service life of the steel pipe is prolonged. The foamed aluminum of the filling layer can effectively absorb a large amount of energy when the steel pipe bears pressure, so that the steel pipe has better buffering capacity when bearing impact pressure or dynamic pressure, damage of the pressure to the whole steel pipe structure is reduced, and the stability of the steel pipe is improved.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe technology, and in particular to a pressure-resistant steel pipe. Background Technology

[0002] Steel pipes are tubular products made primarily of steel. Based on their manufacturing process, they can be divided into two main categories: seamless steel pipes and welded steel pipes. Seamless steel pipes are produced by piercing and rolling solid steel billets, featuring the characteristics of no weld seams and strong pressure resistance. Welded steel pipes are made by rolling steel plates or strips into shape and then welding them, resulting in high production efficiency and lower cost. Steel pipes are not only used for transporting fluids and powdery solids, exchanging heat energy, and manufacturing mechanical parts and containers, but they are also an economical steel material.

[0003] Existing patent (publication number: CN220566758U) discloses "This utility model discloses a high-pressure-resistant steel pipe, comprising: an outer steel pipe and an inner steel pipe, wherein the outer steel pipe is fitted onto the surface of the inner steel pipe, one end of a support frame is fixedly connected to the surface of the inner steel pipe, the other end of the support frame is fixed to one side of a slider, the slider is fitted into the interior of a groove, and the groove is formed on the inner wall of the outer steel pipe. This high-pressure-resistant steel pipe, through the mutual cooperation between the outer steel pipe, the groove, the slider, the support frame, and the inner steel pipe, allows the outer and inner steel pipes to be installed together, and the support frame provides support between the outer and inner steel pipes, giving the inner steel pipe stronger pressure resistance. Simultaneously, through the mutual cooperation between the threaded column, the limiting block, the movable groove, and the mounting plate, the mounting plate is installed between two adjacent sliders via the threaded column, thereby installing adjacent sliders at the edge together, thus maintaining the outer and inner steel pipes in a fixed position."

[0004] In the process of realizing this application, the inventors discovered the following problems with the prior art: Most existing steel pipes are single-layer structures, which have obvious stress concentration when under pressure. When faced with high loads or impacts, they are prone to local buckling or overall instability, making it difficult to meet the requirements of heavy-duty engineering. Furthermore, they lack effective stress dispersion and energy absorption mechanisms. Under complex working conditions, the ends and weak parts of the steel pipes are prone to cracks due to stress concentration, thereby shortening their service life.

[0005] Therefore, those skilled in the art have provided a pressure-resistant steel pipe to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pressure-resistant steel pipe. Through the pressure dispersion of the V-shaped plate and the energy absorption buffer of the foam aluminum filling layer, the pressure resistance and structural stability of the steel pipe are improved, effectively preventing deformation and damage caused by pressure.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A pressure-resistant steel pipe includes an outer shell and an inner tube body. A filling layer is fixedly disposed on the outside of the inner tube body, and an inner shell is fixedly disposed on the outside of the filling layer. Multiple elastic plates are fixedly disposed on the outside of the inner shell, and multiple V-shaped plates are fixedly disposed on the inside of the outer shell.

[0009] Furthermore, four of the V-shaped plates are fixedly mounted on the outside of the inner shell, with each pair of opposite ends facing each other.

[0010] Furthermore, four additional V-shaped plates are fixedly mounted on opposite ends of multiple elastic sheets.

[0011] Furthermore, the inner tube is sleeved inside the inner shell, and the filling layer is aluminum foam.

[0012] Furthermore, the outer shell has external connection ports that are slidably provided at both the front and rear ends, and soft pads are fixedly provided at both the front and rear ends inside the outer shell.

[0013] Furthermore, the opposite ends of the two soft pads are respectively located at the opposite ends of the two external connection ports, and the interior of the two soft pads is fitted over the exterior of the inner tube.

[0014] Furthermore, a first inner interface is fixedly provided at the front end of the inner tube body, and a second inner interface is fixedly provided at the rear end of the inner tube body.

[0015] This utility model has the following beneficial effects:

[0016] This utility model proposes a pressure-resistant steel pipe. When the steel pipe is subjected to external pressure, the outer shell first bears the load, and then the pressure is transmitted to the inner shell and elastic sheet through the V-shaped plate. Since the V-shaped plate has a V-shaped structure, it can disperse the pressure into multiple directional components, thereby effectively avoiding stress concentration. After bearing the pressure, the inner shell will further transmit the load to the filling layer and the inner pipe body. The foamed aluminum used in the filling layer has high specific strength and good energy absorption characteristics. It absorbs a large amount of energy through its own compression deformation, thereby reducing the intensity of the pressure on the inner pipe body, thus reducing the damage of the pressure to the entire structure and improving the service life of the steel pipe. Attached Figure Description

[0017] Figure 1 This is an isometric schematic diagram of the entire utility model;

[0018] Figure 2 This is a side axonometric view of the entire utility model;

[0019] Figure 3 This is a cross-sectional view of the present invention;

[0020] Figure 4 This utility model Figure 3 Enlarged diagram of point A in the diagram.

[0021] Legend:

[0022] 1. Outer shell; 2. Outer connector; 3. Pad; 4. Inner tube; 5. First inner interface; 6. Second inner interface; 7. Inner sleeve; 8. V-shaped plate; 9. Elastic sheet; 10. Filler layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1-4 One embodiment provided by this utility model:

[0025] A pressure-resistant steel pipe includes an outer shell 1 and an inner pipe body 4. A filling layer 10 is fixedly provided on the outside of the inner pipe body 4. An inner shell 7 is fixedly provided on the outside of the filling layer 10. Multiple elastic plates 9 are fixedly provided on the outside of the inner shell 7. Multiple V-shaped plates 8 are fixedly provided inside the outer shell 1.

[0026] Four of the multiple V-shaped plates 8 are fixedly installed on the outside of the inner shell 7, with each pair of opposite ends. The other four of the multiple V-shaped plates 8 are fixedly installed on the opposite ends of the multiple elastic sheets 9. The inner tube 4 is sleeved inside the inner shell 7. The filling layer 10 is aluminum foam.

[0027] The outer shell 1 has external connection ports 2 slidably provided at both the front and rear ends. The outer shell 1 has soft pads 3 fixedly provided at both the front and rear ends. The opposite ends of the two soft pads 3 are respectively provided at the opposite ends of the two external connection ports 2. The two soft pads 3 are both sleeved on the outside of the inner tube 4. The front end of the inner tube 4 is fixedly provided with a first inner interface 5, and the rear end of the inner tube 4 is fixedly provided with a second inner interface 6.

[0028] Specifically, when the steel pipe is subjected to external pressure, the outer shell 1 will initially bear the load and decompose the pressure into multiple directional components through the V-shaped plate 8. Through the geometric stability of the V-shape and the principles of structural mechanics, stress concentration is effectively avoided, making local deformation or damage less likely, thus improving the reliability of the steel pipe under various working conditions. The elastic plate 9 undergoes elastic deformation under the compression of the V-shaped plate 8. The elastic plate 9 is made of spring steel and its surface is quenched, ensuring that it undergoes elastic deformation under the design load without entering the plastic deformation stage. Furthermore, the elastic plate 9 is arc-shaped, which increases the elastic deformation space and avoids stress concentration at the fixed end. Subsequently, it evenly transfers the load to the inner shell 7, which further transmits the pressure to the filling layer 10 and the inner pipe body 4. The foamed aluminum of the filling layer 10, with its high specific strength characteristics, resists stress during compression deformation. Absorbing a large amount of energy weakens the direct effect of pressure on the inner tube 4. Even if the inner tube 4 undergoes slight displacement within the filling layer 10, the soft pad 3 can provide buffer protection through elastic tension, avoiding structural damage caused by rigid collisions. The soft pad 3 is an annular rubber pad with a metal limiting ring embedded in its inner wall. The metal limiting ring is fixed to the inner tube 4 by welding, which can prevent the soft pad 3 from falling off due to long-term vibration. Ultimately, the inner tube 4, with its high-strength rigid material properties, resists the remaining pressure and maintains the integrity and stability of the entire steel pipe structure. Through multiple mechanisms of pressure dispersion and energy absorption, the steel pipe can remain stable under high pressure or impact loads, improving the service life of the steel pipe. It is suitable for heavy-load engineering scenarios such as bridges and building supports. Furthermore, the foam aluminum filling layer 10 achieves a balance between high strength and lightweight, not only reducing the self-weight of the steel pipe but also having energy absorption and sound insulation functions.

[0029] In the steel pipe connection operation, a double-safety connection method with coordinated positioning of inner and outer interfaces is adopted. First, the first inner interface 5 of one steel pipe is precisely aligned with the second inner interface 6 of the other steel pipe. The inner wall of the first inner interface 5 has threads, and the outer surface of the second inner interface 6 has threads. Then, the two are fixed by threads. Rubber sealing rings or anti-loosening gaskets can be added at the threaded connection to prevent the threads from loosening under vibration conditions and to improve the sealing performance. Then, the outer connection ports 2 of the two steel pipes are aligned and high-strength bolts are used to tighten the outer connection ports 2, forming a double locking structure from the inside to the outside, ensuring the continuity and stability of force transmission at the connection. Technical details not described in detail in this specification are all existing technologies well known to those skilled in the art. Compared with traditional single-interface connections, this method can reduce the risk of connection failure due to eccentric force and improve the overall structural safety.

[0030] Working principle: When the steel pipe is subjected to external pressure, the outer shell 1 will first bear the load and transmit the pressure to the inner shell 7 and the elastic plate 9 through the V-shaped plate 8. When under force, it can disperse the pressure into multiple components in multiple directions to avoid stress concentration. The V-shaped plate 8 is V-shaped, which can enhance the overall stability. When the elastic plate 9 is squeezed by the V-shaped plate 8, it will undergo elastic deformation and transmit the force to the inner shell 7. After bearing the pressure, the inner shell 7 will further transmit the load to the filling layer 10 and the inner tube 4. The foam aluminum of the filling layer 10 has high specific strength and good energy absorption characteristics. Through its own compression deformation, it absorbs a large amount of energy, reduces the intensity of the pressure on the inner tube 4, and allows the inner tube 4 to move inside the filling layer 10 and pull the soft pad 3 to protect the inner tube 4. As the core load-bearing component, the inner tube 4 resists the remaining pressure with its own high strength and rigidity.

[0031] When connecting steel pipes, first align the first inner interface 5 of one steel pipe with the second inner interface 6 of another steel pipe, and then connect the two. Next, align one outer connection port 2 with the other outer connection port 2, and then connect the two to complete the fixed connection of the steel pipes.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure-resistant steel pipe, comprising an outer casing (1) and an inner pipe body (4), characterized in that: The inner tube (4) is fixedly provided with a filling layer (10) on the outside, and the filling layer (10) is fixedly provided with an inner shell (7) on the outside. The inner shell (7) is fixedly provided with multiple elastic sheets (9) on the outside, and the outer shell (1) is fixedly provided with multiple V-shaped plates (8) on the inside.

2. The pressure-resistant steel pipe according to claim 1, characterized in that: The multiple V-shaped plates (8) are all fixedly installed on the outside of the inner shell (7) with two opposite ends.

3. The pressure-resistant steel pipe according to claim 1, characterized in that: The other four of the multiple V-shaped plates (8) are fixedly mounted on opposite ends of the multiple elastic sheets (9).

4. The pressure-resistant steel pipe according to claim 1, characterized in that: The inner tube (4) is sleeved inside the inner shell (7), and the filling layer (10) is aluminum foam.

5. The pressure-resistant steel pipe according to claim 1, characterized in that: The outer shell (1) has external connection ports (2) slidably provided at both the front and rear ends, and soft pads (3) are fixedly provided at both the front and rear ends inside the outer shell (1).

6. The pressure-resistant steel pipe according to claim 5, characterized in that: The two soft pads (3) are respectively set at opposite ends of the two external connection ports (2), and the inside of the two soft pads (3) is sleeved on the outside of the inner tube body (4).

7. The pressure-resistant steel pipe according to claim 1, characterized in that: The inner tube (4) has a first inner interface (5) fixedly provided at its front end and a second inner interface (6) fixedly provided at its rear end.

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