Round steel pipe structure of offshore fixed facility

Abstract

The invention discloses a seaborne fixed facility circular steel pipe structure which comprises a circular steel pipe, a first connector and a second connector which are complementary in structure are arranged at the two ends of the circular steel pipe respectively, the first connector and the second connector each comprise a disc, and a pair of L-shaped plates arranged diagonally and a pair of special L-shaped plates arranged diagonally are arranged on each disc. The L-shaped plate and the special-L-shaped plate are each provided with two bolt holes. Four pieces of angle steel I and four pieces of angle steel II are arranged on the peripheries of the two ends of the round steel pipe respectively, and two bolt holes are formed in each of the angle steel I and the angle steel II. When the round steel pipe structure is stressed, due to the fact that the angle steel connecting structures are arranged on the periphery and are far away from the centroid, the round steel pipe structure bears most force when being bent or twisted, stress borne by the internal connector connecting structures is small, and even if the angle steel connecting structures are damaged, the safety of the structure can still be guaranteed through the connector connecting structures. The structural integrity is good, the safety is high, and the installation efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of steel structure technology, and in particular to a circular steel pipe structure for offshore fixed facilities. Background Technology

[0002] With the deepening global development and utilization of marine resources, the construction of offshore fixed facilities has ushered in unprecedented development opportunities. Facilities such as offshore wind power platforms, oil drilling platforms, cross-sea bridge piers, and offshore wharves have become important cornerstones for developing marine energy, developing the marine economy, and consolidating coastal defense.

[0003] The load-bearing capacity and stability of these large offshore fixed facilities are highly dependent on their substructure—a pile foundation or jacket system mainly composed of large-diameter circular steel pipes. Circular steel pipes, due to their excellent hydrodynamic properties, good bending and torsional stiffness, and relatively economical manufacturing cost, have become one of the most widely used structural forms in marine engineering.

[0004] However, the harsh and complex marine environment poses extremely demanding challenges to the design and construction of traditional round steel tube structures. This is mainly reflected in the harsh on-site welding environment at sea (high humidity, strong winds), making it difficult to guarantee weld quality and requiring long welding operations. At the same time, traditional round steel tube structures also have disadvantages such as poor overall integrity and poor tensile and shear resistance, leaving potential safety hazards for the overall structure. Summary of the Invention

[0005] To address the challenges of on-site welding of round steel pipes in harsh and complex marine environments, including difficulties in ensuring welding quality, long welding times, poor overall integrity, and low tensile and shear strength, this invention provides a round steel pipe structure for offshore fixed facilities. This circular steel pipe structure allows for the connection of two round steel pipes using only bolts, resulting in shorter welding times, higher installation efficiency, better structural integrity, and higher safety.

[0006] The present invention is achieved by the following technical solution.

[0007] A circular steel pipe structure for a marine fixed facility includes a circular steel pipe with two structurally complementary joints, namely, a first joint and a second joint, at both ends of the circular steel pipe. Each joint includes a disc with a pair of diagonally arranged L-shaped plates and a pair of diagonally arranged irregular L-shaped plates on the disc. Both the L-shaped plates and the irregular L-shaped plates have two bolt holes. Four angle steels, namely, angle steels, are respectively provided on the periphery of both ends of the circular steel pipe. Each angle steel has two bolt holes.

[0008] Furthermore, the L-shaped plate includes an L-shaped plate body, which includes a first plate body and a second plate body connected at one end. A protrusion is provided on the outer side of the first plate body, and the protrusion is located near the second plate body. A protrusion is also provided on the outer side of the second plate body at the end away from the first plate body.

[0009] Furthermore, the lengths of connector one and connector two are equal.

[0010] Furthermore, the L-shaped plates and the non-L-shaped plates on connector one and connector two are arranged in different directions.

[0011] Furthermore, the lengths of angle steel one and angle steel two are equal.

[0012] Furthermore, both angle steel one and angle steel two are parallel to the length direction of the round steel pipe.

[0013] Furthermore, one half of the length of angle steel one and angle steel two is connected to the round steel pipe, and the other half extends outward.

[0014] Furthermore, the angle steel 2 is connected to the round steel pipe via a connecting block.

[0015] This application has the following beneficial effects: 1. This invention eliminates the need for on-site welding, avoiding the problem of unreliable weld quality. The use of bolted connections makes the structure safer and more reliable.

[0016] 2. During installation, the groove on the connector of this invention facilitates docking and positioning, eliminating the need for calibration, making the operation simple, convenient, short in time, and highly efficient.

[0017] 3. When subjected to stress, since the angle steel connection structure is located on the periphery and far from the centroid, it bears most of the force when subjected to bending or torsion, while the internal joint connection structure is subjected to less stress. Even if the angle steel connection structure is damaged, the safety of the structure can still be ensured through the joint connection structure.

[0018] 4. The first and second connectors of the present invention are structurally coupled, resulting in good overall structural integrity and a good stress state. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic cross-sectional view of the first joint and the first angle steel of the present invention; Figure 3 This is a schematic cross-sectional view of the second joint and the second angle steel of the present invention; Figure 4 This is a cross-sectional schematic diagram of the combination of joint one, joint two, and angle steel one and angle steel two of the present invention; Figure 5 This is a schematic diagram of the butt joint of round steel pipes according to the present invention; Figure 6 This is a diagram showing the state of the round steel pipes after they are joined together according to the present invention.

[0020] Among them, 1. Joint 1; 2. Joint 2; 3. Round steel pipe; 4. Angle steel 1; 5. Angle steel 2; 6. Disc; 7. L-shaped plate; 8. Irregular L-shaped plate; 81. Plate body; 82. Protrusion; 9. Connecting block. Detailed Implementation

[0021] The present patent application will be further described below with reference to the accompanying drawings and embodiments.

[0022] Reference Figure 1-4 A circular steel pipe structure for a fixed offshore facility includes a joint 1, a joint 2, a circular steel pipe 3, an angle steel 4, and an angle steel 5.

[0023] The first joint 1 and the second joint 2 are located at both ends of the round steel pipe 3, and their centroids coincide with the centroids of the round steel pipe 3. Both the first joint 1 and the second joint 2 consist of a disc 6, a pair of diagonally arranged L-shaped plates 7, and a pair of diagonally arranged irregular L-shaped plates 8. A groove is formed between the L-shaped plates 7 and the irregular L-shaped plates 8 on the disc 6. Each L-shaped plate 7 and the irregular L-shaped plate 8 has two bolt holes.

[0024] Specifically, the L-shaped plate 8 includes an L-shaped plate body 81. The plate body 81 includes a first plate body and a second plate body connected at one end. A protrusion 82 is provided on the outer side of the first plate body, and the protrusion 82 is located near the second plate body. A protrusion 82 is also provided on the outer side of the second plate body at the end away from the first plate body.

[0025] In this application, connector 1 and connector 2 are of equal length, and the L-shaped plate 7 and the different L-shaped plate 8 on connector 1 and connector 2 are set in different directions. The groove formed by connector 1 just matches the shape of connector 2, that is, connector 1 and connector 2 are structurally complementary.

[0026] Four angle steels (4 and 5) are respectively provided on the outer periphery of both ends of the round steel pipe 3. Angle steels (4 and 5) are L-shaped and parallel to the length of the round steel pipe 3. Half of their length is welded to the round steel pipe 3, dividing it into four equal parts, while the other half extends outwards. Each angle steel has two bolt holes, and angle steels (4 and 5) are of equal length. In this application, angle steel (5) is connected to the round steel pipe 3 via a connecting block 9. Compared to angle steel (4), angle steel (5) is farther from the centroid of the round steel pipe 3. When two round steel pipes 3 are joined, angle steel (5) is located exactly outside angle steel (4), allowing for the overlap of angle steels (4 and 5).

[0027] When joint 1 and joint 2 are fully connected, all bolt holes and their adjacent bolt holes are continuous, meaning that joint 1 and joint 2, angle steel 4 and angle steel 2 5 can be connected and fixed by bolts.

[0028] This invention also provides a method for joining round steel pipes, wherein the connector 1 of one round steel pipe 3 is aligned with the connector 2 of another round steel pipe 3, such as... Figure 5 As shown; next, following the joint groove, connect joint 1 of round steel pipe 3 to joint 2 of another round steel pipe 3; fix joint 1 and joint 2 with four bolts through the bolt holes of joint 1 and joint 2; at this time, the bolt holes of angle steel 4 of round steel pipe 3 and angle steel 5 of another round steel pipe 3 are also aligned, and fix angle steel 4 and angle steel 5 with four long bolts. The butt joint installation is completed, and the connected state is as follows. Figure 6 As shown.

[0029] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A circular steel pipe structure for offshore fixed facilities, comprising a circular steel pipe (3), characterized in that: At both ends of the round steel pipe (3), there are structurally complementary joints one (1) and two (2). Both joints one (1) and two (2) include a disc (6). The disc (6) has a pair of diagonally arranged L-shaped plates (7) and a pair of diagonally arranged different L-shaped plates (8). Both L-shaped plates (7) and different L-shaped plates (8) have two bolt holes. At both ends of the round steel pipe (3), there are four angle steel one (4) and four angle steel two (5). Both angle steel one (4) and angle steel two (5) have two bolt holes.

2. The circular steel pipe structure for a marine fixed facility according to claim 1, characterized in that: The L-shaped plate (8) includes an L-shaped plate body (81). The plate body (81) includes a first plate body and a second plate body connected at one end. A protrusion (82) is provided on the outer side of the first plate body. The protrusion (82) is located near the second plate body. A protrusion (82) is also provided on the outer side of the second plate body at the end away from the first plate body.

3. The circular steel pipe structure for a marine fixed facility according to claim 1, characterized in that: The lengths of connector one (1) and connector two (2) are equal.

4. The circular steel pipe structure for a marine fixed facility according to claim 1, characterized in that: The L-shaped plate (7) and the different L-shaped plate (8) on the first connector (1) and the second connector (2) are set in different directions.

5. A circular steel pipe structure for a marine fixed facility according to claim 1, characterized in that: The lengths of angle steel one (4) and angle steel two (5) are equal.

6. The circular steel pipe structure for a marine fixed facility according to claim 1, characterized in that: Both angle steel one (4) and angle steel two (5) are parallel to the length direction of the round steel pipe (3).

7. A circular steel pipe structure for a marine fixed facility according to claim 1, characterized in that: Half of the length of angle steel one (4) and angle steel two (5) is connected to the round steel pipe (3), and the other half extends outward.

8. A circular steel pipe structure for a marine fixed facility according to claim 1, characterized in that: The angle steel 2 (5) is connected to the round steel pipe (3) through the connecting block (9).

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