U-shaped plate reinforcing structure for trestle pipe joint of offshore oil platform

Abstract

The invention discloses an offshore oil platform trestle pipe joint U-shaped plate reinforcing structure. The offshore oil platform trestle pipe joint U-shaped plate reinforcing structure comprises a double-layer bent plate with a U-shaped section and a semicircular pipe rib plate. The double-layer bending plate comprises a main double-layer bending plate and a side double-layer bending plate, the main double-layer bending plate is mounted between the first supporting rod and the vertical supporting rod and between the second supporting rod and the vertical supporting rod, and the side double-layer bending plate is mounted between the first supporting rod and the chord member and between the second supporting rod and the chord member; the semicircular pipe rib plates are installed on the pipe walls of the first supporting rod and the second supporting rod. The reinforcing structure can be used for improving the bearing capacity of the trestle when the ocean platform trestle has the requirement for increasing pipelines or other weights, and can also be used for reinforcing the three-supporting-pipe joint structure of the ocean platform trestle which is corroded and serves for many years, so that the safety of the trestle is guaranteed. The method can be widely popularized and applied in the field of oil exploitation, especially in the reinforcing design of trestle pipe joints between ocean platforms.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling, in particular to a U-shaped plate reinforcement structure of a pipe node of an offshore oil platform trestle. Background Art

[0002] In the process of offshore oil development, it is necessary to build offshore oil platforms, and trestles will be installed in the platform group. The trestles are the passages between platforms, which are used to connect oil, gas, water pipelines, electric control cables and personnel between two or more offshore oil platforms. The trestles generally adopt space frame steel structures. The frame steel structure of the trestles is connected by many steel pipes, so a large number of pipe nodes will be generated, among which the three-support pipe node is a common structure.

[0003] Since offshore oil platforms are built on the ocean, the piers between offshore platforms are subject to relatively harsh environmental conditions. Steel structure pipe nodes will have strength problems under static loads and fatigue problems under alternating loads. After the offshore oil platform piers have been in service for a period of time, corrosion will occur. Therefore, it is necessary to inspect the piers in a timely manner and strengthen the structures of the pipe nodes that have problems. In addition, during the entire life cycle of the offshore platform, the platform is usually expanded and renovated, and pipelines or other weights will be added to the piers. Therefore, the structural strength of the pier needs to be re-evaluated, and the pipe nodes need to be structurally strengthened when necessary. Therefore, there is a need for a reinforced structure for the three-support pipe nodes of the pier to ensure the safety of the pier. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a U-shaped plate reinforcement structure for the pipe node of an offshore oil platform trestle. The reinforcement structure can effectively solve the strength problem of the three-support pipe node of the platform trestle caused by long-term load and corrosion, ensure the safety of the platform, and reduce the safety risk of the operation.

[0005] The present invention is achieved by adopting the following technical solutions.

[0006] A U-shaped plate reinforcement structure for a pipe node of an offshore oil platform pier, comprising a double-layer bent plate with a U-shaped cross-section and a semicircular tube rib plate; the double-layer bent plate comprises a main double-layer bent plate and a side double-layer bent plate, the main double-layer bent plate is installed between a first strut and a vertical strut and between a second strut and the vertical strut, the side double-layer bent plate is installed between the first strut and a chord and between the second strut and the chord; the semicircular tube rib plate is installed on the tube wall of the first strut and the second strut.

[0007] Furthermore, the semicircular tube rib plate extends along the axial direction of the support rod.

[0008] Furthermore, a cover plate is installed at the opening of the end of the semicircular tube rib plate.

[0009] Furthermore, semicircular tube ribs are provided on both sides of the support rod tube wall.

[0010] Furthermore, the semicircular tube rib plate is welded to the chord and the strut where it is located.

[0011] Furthermore, the main double-layer bent plate and the side double-layer bent plate are respectively welded to adjacent struts and chords.

[0012] This application has the following beneficial effects.

[0013] The U-shaped plate reinforcement structure of the pipe node of the offshore oil platform pier of the present invention adopts a double-layer bent plate and a semi-circular tube rib plate, which jointly play a structural reinforcement role for the three-support pipe nodes of the pier. The double-layer bent plate and the semi-circular tube rib plate are conventionally welded to the original three-support pipe nodes, which is easy to install and highly economical. It can also effectively improve the structural strength at the three-support pipe nodes and ensure the safety of the pier structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 is a front view of the main double-layer bent plate of the present invention;

[0016] Figure 3 is a side view of the main double-layer bent plate of the present invention;

[0017] Figure 4 This is a front view of the semicircular tube rib plate of the present invention welded to the chord rod and the strut;

[0018] Figure 5 It is a side view of the semicircular tube rib plate welded to the chord and the strut;

[0019] Figure 6 It is a bottom view of the semicircular tube rib plate welded to the chord rod and the support rod of the present invention.

[0020] Among them, 1. chord; 2. first strut; 3. second strut; 4. vertical strut; 5. main double-layer bent plate; 6. side double-layer bent plate; 7. semicircular tube rib plate; 8. cover plate. DETAILED DESCRIPTION

[0021] The present patent application is further described below in conjunction with embodiments.

[0022] The offshore oil platform trestle is generally a space frame steel structure with a large number of three-support pipe nodes. The pipe node U-plate reinforcement structure of this application is installed at the three-support pipe node (composed of chord 1, first support rod 2, second support rod 3 and vertical support rod 4). Figure 1-6As shown, the reinforcement structure includes a main double-layer bent plate 5, a side double-layer bent plate 6 and a semicircular tube rib plate 7.

[0023] There are two main double-layer bent plates 5, which are respectively installed on both sides of the vertical struts 4, and there are two side double-layer bent plates 6, which are respectively installed between the first strut 2 and the chord 1, and between the second strut 3 and the chord 1; the double-layer bent plate is a U-shaped plate, wherein the main double-layer bent plate 5 opens toward the chord 1, the first strut 2 or the second strut 3 and the vertical strut 4, the side double-layer bent plate 6 located between the first strut 2 and the chord 1 opens toward the chord 1 and the first strut 2, and the side double-layer bent plate 6 located between the second strut 3 and the chord 1 opens toward the chord 1 and the second strut 3; each layer of the double-layer bent plate is conventionally welded to the adjacent struts and the chord 1.

[0024] For the three-support tube node, four semicircular tube ribs 7 are used for structural reinforcement. The semicircular tube ribs 7 are arc-shaped ribs. A semicircular tube rib 7 is installed on the tube wall of the first strut 2 and the second strut 3. The length direction of the semicircular tube rib 7 is along the axial direction of the strut where it is located, and it is welded to the chord 1 and the strut where it is located. A cover plate 8 is welded at the end opening of the semicircular tube rib 7 to close the semicircular tube rib 7 and play a reinforcing role.

[0025] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A U-shaped plate reinforcement structure for a pier pipe node of an offshore oil platform, characterized in that: It comprises a double-layer bent plate with a U-shaped cross-section and a semicircular tube rib plate (7); the double-layer bent plate comprises a main double-layer bent plate (5) and a side double-layer bent plate (6); the main double-layer bent plate (5) is installed between the first support rod (2) and the vertical support rod (4) and between the second support rod (3) and the vertical support rod (4); the side double-layer bent plate (6) is installed between the first support rod (2) and the chord rod (1) and between the second support rod (3) and the chord rod (1); the semicircular tube rib plate (7) is installed on the tube wall of the first support rod (2) and the second support rod (3).

2. The U-shaped plate reinforcement structure of the offshore oil platform pier pipe node according to claim 1 is characterized by: The semicircular tube rib plate (7) extends along the axial direction of the support rod.

3. The U-shaped plate reinforcement structure of the offshore oil platform pier pipe node according to claim 1 is characterized by: A cover plate (8) is installed at the opening of the end of the semicircular tube rib plate (7).

4. The U-shaped plate reinforcement structure of the offshore oil platform pier pipe node according to claim 1 is characterized by: Semicircular tube rib plates (7) are provided on both sides of the support rod tube wall.

5. The U-shaped plate reinforcement structure of the offshore oil platform pier pipe node according to claim 1 is characterized by: The semicircular tube rib plate (7) is welded to the chord rod (1) and the strut where it is located.

6. The U-shaped plate reinforcement structure of the offshore oil platform pier pipe node according to claim 1 is characterized by: The main double-layer bent plate (5) and the side double-layer bent plate (6) are respectively connected to adjacent struts and chords (1) by welding.

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