CN117006351A - Topology self-locking sandwich structure, pipeline single ring and seabed explosion-proof pipeline - Google Patents

Abstract

The invention provides a topological self-locking sandwich structure, a pipeline single ring and a submarine explosion-proof pipeline, and belongs to the technical field of marine pipeline engineering. The topological self-locking sandwich structure comprises a first building block and a second building block which are in a minor arc shape, wherein first splicing surfaces are symmetrically arranged on two opposite sides of the first building block in the circumferential direction of an arc, and second splicing surfaces are symmetrically arranged on two ends of the first building block in the circumferential direction of the arc; the second building block is provided with the third amalgamation face in circular arc circumference direction relative bilateral symmetry, third amalgamation face and first amalgamation face assorted, and the both ends symmetry in circular arc circumference direction of second building block is provided with the fourth amalgamation face. The first block and the second block can be spliced by the first splicing face and the third splicing face or can be spliced by the second splicing face and the fourth splicing face so as to be meshed and fixed in the radial direction of the circular arc. The topological self-locking sandwich structure can effectively improve the local damage tolerance and the whole loading capacity of the submarine pipeline.

Description

Topological self-locking sandwich structure, pipeline single ring and submarine explosion-proof pipeline

Technical field

The invention relates to the technical field of marine pipeline engineering, and in particular to a topological self-locking sandwich structure, a pipeline single ring and a submarine explosion-proof pipeline.

Background technique

Submarine pipelines can transport oil, gas, water, telecommunications and other materials and information that require long-distance transmission from the seabed to land or other places. They have the advantages of large transport capacity, stability and reliability. With the development and utilization of marine oil and gas resources and the development of marine communication projects, submarine pipeline projects have gradually become of great significance.

In related technologies, currently commonly used submarine pipelines are mostly made of long-length (standard length is 12.192 meters) metal or soft materials that are prefabricated on land and lowered to the seabed for assembly.

Submarine pipeline projects are susceptible to impact from anchors, organisms, etc. The spliced tubular structures in related technologies are all prefabricated integrated structures. When subjected to external impact loads, some sections of the pipelines in the overall structure will produce vibrations. Pipe cracks will quickly spread to the surrounding areas, causing overall structural instability and damage. At the same time, the overall structure of the submarine pipeline will bear greater shear force due to poor flexibility due to wave load or uneven settlement of the stratum. Moreover, the installation and construction environment on the seabed is complex. Once an accident occurs, the maintenance of the pipeline is more difficult than on land. It is even more difficult, so a new type of pipeline structure is urgently needed to improve the load-bearing capacity of the pipeline on the seabed.

Contents of the invention

Embodiments of the present invention provide a topological self-locking sandwich structure, a pipeline single ring and a submarine explosion-proof pipeline, which can effectively improve the local damage tolerance and overall load-bearing capacity of the submarine pipeline. The technical solution is as follows:

In a first aspect, embodiments of the present invention provide a topological self-locking sandwich structure. The topological self-locking sandwich structure includes:

The first building block and the second building block, the first building block and the second building block are arc-shaped blocks with a minor arc shape,

The first building block is symmetrically provided with first joining surfaces on opposite sides in the arc circumferential direction, and the first building block is symmetrically provided with second joining surfaces at both ends in the arc circumferential direction;

The second building blocks are symmetrically provided with third joining surfaces on opposite sides in the arc circumferential direction. The third joining surfaces match the first joining surfaces. The second building blocks are arranged on opposite sides in the arc circumferential direction. A fourth split surface is symmetrically provided at both ends, and the fourth split surface matches the second split surface;

The topological self-locking sandwich structure is configured such that the first building block and the second building block can be joined and spliced by the first joining surface and the third joining surface, or can be joined by the second joining surface. The split surface and the fourth split surface are joined together to achieve bite fixation in the radial direction of the first block and the second block body.

Optionally, the first joining surface is an arc-shaped convex surface, the third joining surface is an arc-shaped concave surface matching the first joining surface; the second joining surface is an arc-shaped concave surface, and the fourth joining surface is an arc-shaped concave surface. The split surface is an arc-shaped convex surface matching the second split surface.

Optionally, the first building block includes an opposite first outer cambered surface and a first inner cambered surface, and the first split surface and the second split surface are located between the first outer cambered surface and the first split surface. Between the first inner arc surfaces, the second building block includes an opposite second outer arc surface and a second inner arc surface, and the third joining surface and the fourth joining surface are located on the second outer arc surface. Between the surface and the second inner arc surface, the arc radii of the first outer arc surface and the second outer arc surface are the same, and the arc radii of the first inner arc surface and the second inner arc surface are same.

Optionally, the first block and the second block are high-strength concrete blocks.

In a second aspect, embodiments of the present invention provide a pipeline single ring, including a plurality of the topological self-locking sandwich structures described in the first aspect, and the first building block in the plurality of topological self-locking sandwich structures. The block and the second building block are joined and spliced through the second splitting surface and the fourth splitting surface to achieve mutual engagement and fixation in the arc circumferential direction to form a ring structure.

In a third aspect, embodiments of the present invention also provide a submarine explosion-proof pipeline, including a plurality of pipeline single rings described in the second aspect, and the plurality of pipeline single rings are staggered and assembled along the axial direction of the pipeline single rings. , between two adjacent pipeline single rings, the submarine explosion-proof pipeline includes a plurality of pipeline single rings as claimed in claim 5, and the plurality of pipeline single rings are staggered along the axis of the ring structure. Seams are assembled to form a pipe structure. Between two adjacent ring structures, the first building block and the adjacent second building block pass through the first joining surface and the third joining surface. Face to face splicing.

Optionally, the submarine explosion-proof pipeline also includes an edge positioning ring. Two of the edge positioning rings are provided and have opposite joining planes and a limiting mounting surface in the axial direction. The limiting mounting surface is in contact with the positioning ring. The plurality of first joining surfaces and the plurality of third joining surfaces on one side of the single ring in the axial direction match each other, and the two edge positioning rings are joined and fixed to the said limiting installation surface respectively. The two ends of the tube structure in the axial direction.

Optionally, the submarine explosion-proof pipeline also includes a metal pipe body. The metal pipe body includes a metal outer pipe and a metal inner pipe. The metal outer pipe is sleeved on the outside of the pipe body structure, and the metal inner pipe is connected with the pipe structure. The shaft is installed inside the tube structure.

The beneficial effects brought by the technical solutions provided by the embodiments of the present invention include at least:

Using the topological self-locking sandwich structure provided by the embodiment of the present invention, the interlocking structure composed of the first block and the second block can be disposed inside the submarine pipeline as a force-bearing support structure. The first block The interlocking contact with the second block is interlocking, which has strong ductility to the impact load. The structure is stable and the compressive resistance to stress is improved. And even if a large impact load causes damage and cracks on the surface of individual first blocks or second blocks, they will not extend to other adjacent first blocks and second blocks, making it convenient for subsequent targeted repairs. Rapid repair can effectively improve the local damage tolerance and overall load-bearing capacity of submarine pipelines.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic three-dimensional structural diagram of the outside of the topological self-locking sandwich structure provided by an embodiment of the present invention;

Figure 2 is a schematic three-dimensional structural diagram of the inside of the topological self-locking sandwich structure provided by an embodiment of the present invention;

Figure 3 is a schematic side view of the topological self-locking sandwich structure in the arc circumferential direction according to the embodiment of the present invention;

Figure 4 is a schematic three-dimensional structural diagram of a single ring of pipeline provided by an embodiment of the present invention;

Figure 5 is a schematic three-dimensional structural diagram of a submarine explosion-proof pipeline provided by an embodiment of the present invention;

Figure 6 is a schematic three-dimensional structural diagram of a pipe structure provided by an embodiment of the present invention;

Figure 7 is a schematic three-dimensional structural diagram of an edge positioning ring provided by an embodiment of the present invention;

Figure 8 is a schematic structural diagram of a metal pipe body provided by an embodiment of the present invention.

In the picture:

1-The first building block; 2-The second building block; 3-Edge positioning ring; 4-Metal pipe body; 11-The first joining surface; 12-The second joining surface; 13-The first outer arc surface; 14- The first inner arc surface; 15-the first side; 21-the third joining surface; 22-the fourth joining surface; 23-the second outer arc surface; 24-the second inner arc surface; 25-the second side; 31-joining plane; 32-limiting installation surface; 41-metal outer tube; 42-metal inner tube; 131-first long side; 132-first short side; 141-second short side; 142-second long side Side; 231-the third short side; 232-the third long side; 241-the fourth long side; 242-the fourth short side; m-ring structure; n-tube structure.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

In related technologies, currently commonly used submarine pipelines are mostly made of long-length (standard length is 12.192 meters) metal or soft materials that are prefabricated on land and lowered to the seabed for assembly.

Submarine pipeline projects are susceptible to impact from anchors, organisms, etc. The spliced tubular structures in related technologies are all prefabricated integrated structures. When subjected to external impact loads, some sections of the pipelines in the overall structure will produce vibrations. Pipe cracks will quickly spread to the surrounding areas, causing overall structural instability and damage. At the same time, the overall structure of the submarine pipeline will bear greater shear force due to poor flexibility due to wave load or uneven settlement of the stratum. Moreover, the installation and construction environment on the seabed is complex. Once an accident occurs, the maintenance of the pipeline is more difficult than on land. It is even more difficult, so a new type of pipeline structure is urgently needed to improve the load-bearing capacity of the pipeline on the seabed.

Figure 1 is a schematic structural diagram of the outer side of a topological self-locking sandwich structure provided by an embodiment of the present invention. Figure 2 is a schematic three-dimensional structural diagram of the inside of the topological self-locking sandwich structure provided by an embodiment of the present invention. Figure 3 is a schematic side view of the topological self-locking sandwich structure in the arc circumferential direction according to an embodiment of the present invention. As shown in Figures 1 to 3, through practice, embodiments of the present invention provide a topological self-locking sandwich structure, including a first block 1 and a second block 2, and a first block 1 and a second block 2. Both bodies are arc-shaped blocks with a minor arc shape.

Among them, the first block 1 is symmetrically provided with first split surfaces 11 on opposite sides in the arc circumferential direction, and the first block 1 is symmetrically provided with second split surfaces 12 at both ends in the arc circumferential direction.

The second block 2 is symmetrically provided with third split surfaces 21 on opposite sides in the arc circumferential direction. The third split surfaces 21 match the first split surface 11 . The second block 2 has two ends in the arc circumferential direction. A fourth split surface 22 is symmetrically arranged, and the fourth split surface 22 matches the second split surface 12 .

The topological self-locking sandwich structure is configured such that the first block 1 and the second block 2 can be joined together through the first joining surface 11 and the third joining surface 21, or can be joined together through the second joining surface 12 and the fourth joining surface. 22 are aligned and spliced to achieve bite fixation in the radial direction of the first block 1 and the second block 2.

In the embodiment of the present invention, the topological self-locking sandwich structure is composed of a first block 1 and a second block 2 with certain different shapes to form a minimum combined unit structure. Wherein, the first building block 1 and the second building block 2 are arc-shaped blocks with six faces. Specifically, the first building block 1 includes an opposite first outer arc surface 13 and a first inner arc surface 14. The first split surface 11 and the second split surface 12 are both located between the first outer arc surface 13 and the first inner arc surface. 14, the second block 2 includes an opposite second outer arc surface 23 and a second inner arc surface 24, and the third split surface 21 and the fourth split surface 22 are both located on the second outer arc surface 23 and the second inner arc surface. Between the surfaces 24, the arc radii of the first outer arc surface 13 and the second outer arc surface 23 are the same, and the arc radii of the first inner arc surface 14 and the second inner arc surface 24 are the same. In the thickness direction, that is, in the radial direction of the arc where they are located, the space between the first outer arc surface 13 and the first inner arc surface 14 and the second outer arc surface 23 and the second inner arc surface 24 are parallel to each other. , and the spacing is the same.

Illustratively, both the first outer arc surface 13 and the first inner arc surface 14 are in the shape of arc strips. The first outer arc surface 13 has two opposite sides on both sides in the arc direction of the first block 1. One long side 131 has two opposite first short sides 132 at both ends in the arc direction. The first inner arc surface 14 has two opposite second short sides 141 on both sides of the first block 1 in the arc direction, and has two opposite second long sides 142 on both ends in the arc direction. The first long side 131 and the second short side 141 are connected through the two first sides 15 to form the first combined surface 11 , and the first short side 132 and the second long side 142 are connected through the two first sides 15 to form second joining surface 12;

Correspondingly, the second outer arc surface 23 and the second inner arc surface 24 are both in the shape of arc-shaped strips. The second outer arc surface 23 has two relatively third short ribs on both sides in the arc direction of the second block 2. The side 231 has two opposite third long sides 232 at both ends in the arc direction; the second inner arc surface 24 has two opposite fourth long sides at both sides of the second block 2 in the arc direction. 241, with two opposite fourth short sides 242 at both ends in the arc direction. The third short side 231 and the fourth long side 241 are connected through the two second sides 25 to form the third split surface 21 , and the third long side 232 and the fourth short side 242 are connected through the two second sides 25 to form The fourth joining surface 22.

When combining the first block 1 and the second block 2, the first block 1 can be connected to the two second blocks respectively through the first joining surfaces 11 provided on opposite sides of the arc circumferential direction. The third joining surfaces 21 of 2 are butted and joined together, and the second joining surfaces 12 at both ends in the arc circumferential direction are joined to each other with the fourth joining surfaces 22 of the other two second blocks 2 respectively. In the first block 1 and the second block 2 that are assembled together, the first short side 132 on the first outer arc surface 13 and the third long side 232 on the second outer arc surface 23 are connected and smoothly transitioned. The second long side 142 on the first inner arc surface 14 is connected to the third short side 231 on the second inner arc surface 24 and transitions smoothly. In the assembled topological self-locking sandwich structure, four second blocks 2 can be meshed with each other on both sides of each first block 1 in the arc circumferential direction, and at both ends in the arc circumferential direction. Topological self-locking structure; alternatively, the two sides of each second block 2 in the arc circumferential direction and the two ends in the arc circumferential direction can be combined with four first blocks 1 to engage with each other to form a topological self-locking structure. In order to achieve bite fixation in the arc radial direction, the topological self-locking sandwich structure can be set inside the submarine pipeline as a force-bearing support structure, and the outer tube of the pipeline is supported by the first outer arc surface 13 and the second outer arc surface 23. The wall is supported, and the inner pipe arm of the pipeline is supported by the first inner arc surface 14 and the second inner arc surface 24. The interlocking contact between the first block 1 and the second block 2 is interlocking, and has strong ductility against the impact load. The structure is stable and the resistance to stress is improved. And even if a large impact load causes damage and cracks on the surface of an individual first block 1 or second block 2, it will not extend to other adjacent first blocks 1 and second blocks 2, which facilitates follow-up. Targeted rapid repair can effectively improve the local damage tolerance and overall load-bearing capacity of submarine pipelines.

Optionally, the first joining surface 11 is an arc-shaped convex surface, the third joining surface 21 is an arc-shaped concave surface matching the first joining surface 11; the second joining surface 12 is an arc-shaped concave surface, and the fourth joining surface 22 is an arc-shaped concave surface. The second joining surface 12 matches the arc-shaped convex surface. Illustratively, in the embodiment of the present invention, by arranging the first joining surface 11 , the second joining surface 12 , the third joining surface 21 and the fourth joining surface 22 as corresponding arc-shaped concave and convex results, mutual joining can be further improved. The final contact area increases the joint stability and stress tolerance, ensuring the local damage tolerance and overall load bearing capacity of the submarine pipeline.

Optionally, the first block 1 and the second block 2 are high-strength concrete blocks. Illustratively, in the embodiment of the present invention, the first block 1 and the second block 2 are made of concrete with a strength grade of C60 or above, which has the advantages of high compressive strength, strong deformation resistance, high density, and low porosity. , which can effectively improve the service life and load-bearing capacity of the topological self-locking sandwich structure.

Figure 4 is a schematic three-dimensional structural diagram of a single ring of pipeline provided by an embodiment of the present invention. As shown in Figure 4, an embodiment of the present invention also provides a pipeline single ring, including a plurality of topological self-locking sandwich structures as shown in Figures 1 to 3. The first of the plurality of topological self-locking sandwich structures The block 1 and the second block 2 are aligned and spliced through the second joining surface 12 and the fourth joining surface 22 to achieve mutual engagement and fixation in the arc circumferential direction to form a ring structure m. For example, in the embodiment of the present invention, when a plurality of minimum units of the first building block 1 and the second building block 2 are combined and used, they can be combined sequentially along the circumferential direction of the arc to finally form a first unit. The outer arc surface 13 and the second outer arc surface 23 are the outer ring, the first inner arc surface 14 and the second inner arc surface 24 are the annular structure m of the inner ring, and there are a plurality of first building blocks 1 in the radial direction of the arc. Self-locking can be achieved between the second block 2 and the second block 2, and a stable combination and support structure can be achieved without the need to set additional bolts and other fixing elements at the joining position. The structure is simple and has high practicability.

Figure 5 is a schematic three-dimensional structural diagram of a submarine explosion-proof pipeline provided by an embodiment of the present invention. Figure 6 is a schematic three-dimensional structural diagram of a pipe structure provided by an embodiment of the present invention. Figure 7 is a schematic three-dimensional structural diagram of an edge positioning ring provided by an embodiment of the present invention. Figure 8 is a schematic structural diagram of a metal pipe body provided by an embodiment of the present invention. As shown in Figures 5 to 8, an embodiment of the present invention also provides a submarine explosion-proof pipeline, which includes a plurality of pipeline single rings as shown in Figure 4. The plurality of pipeline single rings are staggered along the axis direction of the ring structure m. Assembled to form a pipe structure n, between two adjacent ring structures m, the first block 1 and the adjacent second block 2 are aligned and spliced through the first joining surface 11 and the third joining surface 21 . For example, in the embodiment of the present invention, after completing the combination of multiple pipeline single-ring ring structures m, the multiple ring structures m can be coaxially arranged along the axis direction, that is, the direction of the submarine explosion-proof tunnel. , between two adjacent ring structures m, they are staggered and spliced after adjusting a certain angle around the axis. Between the two adjacent ring structures m, the first block 1 and the adjacent second block 2 Through the alignment and splicing of the first joining surface 11 and the third joining surface 21, a pipe structure n of a specified length has been formed. The single-ring pipe body composed of the topological self-locking sandwich structure provided by the embodiment of the present invention is combined to form a submarine explosion-proof pipeline. The pipe body structure n can be set inside the submarine pipeline as a force-bearing support structure. Through the first The outer arc surface 13 and the second outer arc surface 23 support the outer wall of the pipeline, and the first inner arc surface 14 and the second inner arc surface 24 support the inner pipe arm of the pipeline. The interlocking contact between the first block 1 and the second block 2 is interlocking, and has strong ductility against the impact load. The structure is stable and the resistance to stress is improved. And even if a large impact load causes damage and cracks on the surface of an individual first block 1 or second block 2, it will not extend to other adjacent first blocks 1 and second blocks 2, which facilitates follow-up. Targeted rapid repair can effectively improve the local damage tolerance and overall load-bearing capacity of submarine pipelines.

Optionally, the submarine explosion-proof pipeline also includes edge positioning rings 3. There are two edge positioning rings 3, and have opposite joining planes 31 and limiting installation surfaces 32 in the axial direction. The limiting installation surfaces 32 are separate from the pipeline. A plurality of first joining surfaces 11 and a plurality of third joining surfaces 21 on one side of the ring in the axial direction match each other. The two edge positioning rings 3 are respectively joined and fixed to the pipe structure n in the axial direction through the limiting mounting surfaces 32 both ends. Illustratively, in the embodiment of the present invention, after the assembly of the pipe structure n is completed, both axial ends thereof are formed by a combination of a plurality of first joining surfaces 11 and a plurality of third joining surfaces 21 The irregular structure is not conducive to transportation and docking after the preparation of the single-section pipe structure n. Therefore, an edge positioning ring 3 is respectively provided at both ends of the pipe structure n, and its matching limiting installation surface 32 is used to align the end surface formed by the combination of the plurality of first split surfaces 11 and the plurality of third split surfaces 21. The combined fixed connection realizes clamping and positioning of both ends of the pipe structure n, which improves the stability of the overall structure. At the same time, the joining plane 31 at the other end can be used as a corresponding surface for lifting and docking. Various mounting holes can be processed on the splicing plane 31 to adapt to the clamping of transportation equipment, as well as the docking structures between different sections of submarine explosion-proof pipelines, which further improves the practicality of the submarine explosion-proof pipelines.

Optionally, the submarine explosion-proof pipeline also includes a metal pipe body 4. The metal pipe body 4 includes a metal outer pipe 41 and a metal inner pipe 42. The metal outer pipe 41 is sleeved on the outside of the pipe structure n, and the metal inner pipe 42 is coaxially installed on Inside the tube structure n. Illustratively, in the embodiment of the present invention, by coating the metal pipe body 4 inside and outside the pipe structure n, the pipe structure n composed of the topological self-locking sandwich structure is used as a sandwich to realize the inner and outer protection of the metal pipe body 4 Pipe structure support improves the local damage tolerance and overall load-bearing capacity of submarine pipelines.

Unless otherwise defined, technical or scientific terms used herein shall have their ordinary meaning understood by a person of ordinary skill in the art to which this invention belongs. "First", "second" and similar words used in the specification and claims of the patent application of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Likewise, "a" or "one" and similar words do not indicate a quantitative limit, but rather indicate the presence of at least one. "Include" or "include" and other similar words mean that the elements or objects appearing before "include" or "include" cover the elements or objects listed after "include" or "include" and are extremely equivalent, and do not exclude other elements. or objects. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to express relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

The above are only optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (8)

1. A topological self-locking sandwich structure, characterized in that it includes: a first building block (1) and a second building block (2); the first building block (1) and the second building block (2) 2) The bodies are all arc-shaped blocks with a minor arc shape. The first block (1) is symmetrically provided with first joining surfaces (11) on opposite sides in the arc circumferential direction, and the first block (1) is symmetrically provided with first joining surfaces (11) at both ends in the arc circumferential direction. Two split surfaces (12); The second block (2) is symmetrically provided with third joining surfaces (21) on opposite sides in the arc circumferential direction, and the third joining surfaces (21) match the first joining surfaces (11). , the second building block (2) is symmetrically provided with fourth joining surfaces (22) at both ends in the arc circumferential direction, and the fourth joining surfaces (22) match the second joining surfaces (12) ; The topological self-locking sandwich structure is configured such that the first block (1) and the second block (2) can pass through the first split surface (11) and the third split surface (21) ), or can be joined and spliced through the second joining surface (12) and the fourth joining surface (22), so that the first building block (1) and the second building block (22) can be joined together. 2) Occlusal fixation is achieved in the radial direction of the body. 2. The topological self-locking sandwich structure according to claim 1, characterized in that the first joining surface (11) is an arc-shaped convex surface, and the third joining surface (21) is formed with the first joining surface. The second joining surface (12) is an arc-shaped concave surface, and the fourth joining surface (22) is an arc-shaped surface that matches the second joining surface (12). convex surface. 3. The topological self-locking sandwich structure according to claim 2, characterized in that the first building block (1) includes an opposite first outer arc surface (13) and a first inner arc surface (14), The first joining surface (11) and the second joining surface (12) are both located between the first outer arc surface (13) and the first inner arc surface (14). The block (2) includes an opposite second outer arc surface (23) and a second inner arc surface (24), and the third split surface (21) and the fourth split surface (22) are both located on the second Between the outer arc surface (23) and the second inner arc surface (24), the arc radii of the first outer arc surface (13) and the second outer arc surface (23) are the same, and the first outer arc surface (23) has the same arc radius. The arc radii of the inner arc surface (14) and the second inner arc surface (24) are the same. 4. The topological self-locking sandwich structure according to claim 1, characterized in that the first block (1) and the second block (2) are made of high-strength concrete blocks. 5. A pipeline single ring, characterized in that the pipeline single ring includes a plurality of topological self-locking sandwich structures according to any one of claims 1 to 4, and among the plurality of topological self-locking sandwich structures The first building block (1) and the second building block (2) are aligned and spliced through the second joining surface (12) and the fourth joining surface (22) to achieve arc circumference. They bite and fix upward to form a ring structure (m). 6. A submarine explosion-proof pipeline, characterized in that the submarine explosion-proof pipeline includes a plurality of pipeline single rings as claimed in claim 5, and the plurality of pipeline single rings are along the axial direction of the ring structure (m) Staggered joints are assembled to form a pipe structure (n). Between two adjacent ring structures (m), the first block (1) and the adjacent second block (2) The first joining surface (11) and the third joining surface (21) are aligned and spliced. 7. The submarine explosion-proof pipeline according to claim 6, characterized in that the submarine explosion-proof pipeline further includes an edge positioning ring (3), two of the edge positioning rings (3) are provided, and have a The opposite joining plane (31) and the limiting installation surface (32), the limiting installation surface (32) is a plurality of the first joining surfaces (11) on the axial side of the single ring of the pipeline Matching with the plurality of third joining surfaces (21), the two edge positioning rings (3) are fixed to the pipe structure (n) in the axial direction through the limiting installation surfaces (32). on both ends. 8. The submarine explosion-proof pipeline according to claim 7, characterized in that the submarine explosion-proof pipeline further includes a metal pipe body (4), and the metal pipe body (4) includes a metal outer pipe (41) and a metal inner pipe. (42), the metal outer tube (41) is sleeved on the outside of the tube structure (n), and the metal inner tube (42) is coaxially installed on the inside of the tube structure (n).