Offshore platform blast wall with energy-dissipating cushion support

Abstract

The utility model provides a kind of offshore platform explosion-proof wall with energy-dissipation buffer support, comprising: wall body;Buffer support is set on the edge of wall body, the length of buffer support on every side of wall body is equal to the length of corresponding measured wall body;The buffer support includes: shell, section is U type, the opening of the U type is towards wall body;Sliding component is set in the U type of shell, and can slide back and forth in the thickness direction of wall body relative to shell;Rotary component, one side is connected with wall body, and the other side is rotatably connected with sliding component. First gap exists between shell body and sliding component, second gap exists between rotary component and sliding component, polymethacrylimide (PMI) foam is set in first gap, linear spring is set in second gap.

Description

Technical Field

[0001] This utility model relates to the field of marine protection technology, specifically to a marine platform explosion-proof wall with energy dissipation buffer support. Background Technology

[0002] In the field of offshore engineering construction, explosion-proof walls for offshore oil and gas platforms are key protective structures that ensure the safety of offshore oil and gas platforms, ports, and related facilities, and are used to withstand extreme loads such as explosive impacts. With the continuous development of marine activities, the performance requirements for explosion-proof walls of offshore oil and gas platforms are becoming increasingly stringent.

[0003] In existing technologies, explosion-proof walls for offshore oil and gas platforms are mostly connected to the main structure (such as upper module steel beams and columns) at the ends using angle steel welded joints. This design is only suitable for relatively weak explosions (explosive overpressure less than 100 kPa). Recent large-scale explosion tests show that explosion-proof walls for offshore oil and gas platforms can withstand overpressures as high as 400 kPa. Under such conditions, existing designs will fail due to the membrane effect caused by the large plastic deformation of the explosion-proof wall. Under high explosive loads, the connection nodes must simultaneously withstand shear force, axial membrane force, and large angular deformation, making them extremely prone to fracture. Although reinforcing the nodes can reduce deformation, it will increase the concentration of membrane force at the weld, causing the failure mode to change from ductile bending of the wall to brittle shear / tensile fracture at the wall connection. This results in the explosion-proof wall being ejected entirely during an explosion, without the wall itself fulfilling its bending energy absorption function. Therefore, simply reinforcing and thickening the explosion-proof wall in the design cannot change its failure mode under large explosions and is unlikely to meet regulatory requirements. To address the aforementioned issues, there is an urgent need in this field for a novel explosion-proof wall structure for offshore oil and gas platforms to enhance the explosion-proof wall's disaster resistance and durability, thereby meeting the long-term, safe, and stable protection requirements of offshore engineering projects. Utility Model Content

[0004] To address the aforementioned issues, a blast-resistant wall for offshore platforms with energy-dissipating buffer supports is provided. Two energy-absorbing devices are designed for the translational and rotational degrees of freedom of the wall supports: a polymethacrylamide (PMI) foam filling the space behind the limiting seat and springs on both sides of the limiting seat. During an explosion, the PMI foam guides the wall to slide backward through its own plastic deformation, avoiding the peak blast load and acting as an energy-dissipating buffer. The explosion causes irreversible plastic deformation of the wall. As the wall end slides along the arc-shaped limiting plate, the spring on one side of the arc-shaped limiting plate is compressed, while the spring on the other side is pulled. Since the plastic deformation of the wall is irreversible, the spring deformation is also irreversible, making the springs also energy-absorbing devices, playing a role in dissipating energy and controlling deformation. Specifically, the wall deformation can be controlled by adjusting the spring stiffness to control the rotation angle at the wall end. Thus, this new design constructs a multi-level energy dissipation system, buffering, converting, and dissipating the energy of the blast impact load, preventing all the blast energy from acting on the bottom connection point of the wall and avoiding overall wall detachment and damage. To achieve the above objectives, this utility model provides the following technical solution: a marine oil and gas platform explosion-proof wall with energy-dissipating buffer supports, comprising: Walls; A buffer support is installed on the edge of the wall, and the length of the buffer support on each side of the wall is equal to the length of the corresponding wall section; the buffer support includes: The outer shell has a U-shaped cross-section, with the opening of the U-shape facing the wall; A sliding component is disposed within the U-shape of the outer casing and is capable of sliding back and forth relative to the outer casing in the thickness direction of the wall. The rotating component is connected to the wall on one side and to the sliding component on the other side.

[0005] Preferably, partition plates are respectively provided on the two inner side walls of the U-shape of the outer shell, and the partition plates and the bottom of the outer shell form a sliding groove; the sliding component includes a sliding plate, and the two sides of the sliding plate along the thickness direction can be inserted into the corresponding sliding groove and slide back and forth in the sliding groove along the thickness direction.

[0006] Preferably, the sliding component further includes two upright plates disposed on one side of the sliding plate facing the U-shaped opening of the outer shell, the two upright plates being arranged along the thickness direction; a plastic component is disposed between each upright plate and the corresponding side wall of the outer shell, and the plastic component is located on the side of the partition plate facing away from the bottom of the outer shell.

[0007] Preferably, an arc-shaped protrusion is provided on the side of the sliding plate facing the U-shaped opening of the outer shell, and the arc-shaped protrusion is located between the two upright plates; an arc-shaped groove is provided on the side of the rotating component facing the sliding plate, and the diameter of the contact surface of the arc-shaped protrusion and the arc-shaped groove is the same, and the rotating component can rotate around the arc-shaped protrusion.

[0008] Preferably, two rows of springs are provided on both sides of the rotating component. One end of each spring abuts against the sliding plate, and the other end abuts against the rotating component. When the rotating component is in the initial position, the spring is not subjected to any external force. When the rotating component rotates, the spring on one side exerts a pushing force on the rotating component, and the spring on the other side exerts a pulling force on the rotating component.

[0009] Preferably, a cover plate is provided on the side of the plastic component facing away from the partition plate, one side of the cover plate is fixed to the upright plate, and the other end is fixed to the outer shell.

[0010] Preferably, a strip-shaped hole is provided at the connection between the cover plate and the upright plate or the outer shell, and the strip-shaped hole extends along the lateral direction.

[0011] The advantages of this utility model compared to the prior art are: By installing buffer supports at the bottom of the wall, the wall is allowed to rotate and shift slightly, avoiding the peak load of the explosion and thus acting as a buffer. Simultaneously, the horizontal movement of the sliding component, in conjunction with the deformation of the first plastic component (PMI foam), dissipates the explosion energy; the oscillation of the rotating component, working in conjunction with the first elastic component (linear spring), controls the rotational deformation of the wall. An explosion causes irreversible plastic deformation of the wall, resulting in irreversible deformation of the first elastic component, which then also becomes an energy-absorbing device. Therefore, this design incorporates a triple energy dissipation system: the wall itself, the PMI foam, and the linear spring. These three components work in tandem, employing multiple energy dissipation measures to buffer, convert, and dissipate the explosive impact energy, preventing all the explosive energy from acting on the bottom connection point of the wall and avoiding overall wall detachment and damage. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the connection structure between two sets of buffer supports and the wall of an explosion-proof wall for an offshore platform with energy dissipation buffer supports according to this utility model.

[0013] Figure 2 This is a schematic diagram of the connection structure between a set of buffer supports and the wall body of an explosion-proof wall for an offshore platform with energy dissipation buffer supports according to this utility model.

[0014] Figure 3 This is a schematic diagram of the buffer support structure of an explosion-proof wall for an offshore platform with an energy-dissipating buffer support according to this utility model.

[0015] Figure 4 This is a schematic diagram of the split structure of the buffer support of the explosion-proof wall of an offshore platform with energy dissipation buffer support according to the present invention.

[0016] Figure 5This is a cross-sectional structural diagram of an explosion-proof wall for an offshore platform with energy-dissipating buffer supports, according to this utility model.

[0017] Figure 6 This is a cross-sectional structural diagram of the connection between the rotating and sliding components of an explosion-proof wall for an offshore platform with an energy-dissipating buffer support, according to this utility model.

[0018] Figure 7 This is a cross-sectional structural diagram of the connection between the sliding component and the outer shell of an explosion-proof wall for an offshore platform with an energy-dissipating buffer support, according to this utility model. Detailed Implementation

[0019] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0020] like Figures 1-6 As shown, this utility model provides an explosion-proof wall for an offshore platform with energy dissipation buffer supports, including a wall body 1 and buffer supports 2 set on the edge of the wall body 1. The wall body 1 is fixed to other structures by the buffer supports 2. The length of the buffer supports 2 on each side of the wall body 1 is equal to the length of the corresponding wall body 1.

[0021] The buffer support 2 includes a housing 20, a sliding component 21, a rotating component 22, a plastic component 23, and a spring 24. The sliding component 21 is disposed inside the housing 20 and can move laterally inside the housing 20. The rotating component 22 is disposed on the sliding component 21 and can rotate relative to the sliding component 21. Its axis of rotation is parallel to the longitudinal extension direction of the sliding component 21.

[0022] The outer casing 20 has a U-shaped cross-section with the opening of the U facing the wall 1. Partition plates 201 are respectively provided on the two inner side walls of the U-shape of the outer casing 20, and the partition plates 201 and the bottom of the outer casing 20 form a sliding groove. The sliding component 21 includes a sliding plate 210, the two lateral sides of which can be inserted into the corresponding sliding grooves and slide back and forth along the lateral direction within the grooves.

[0023] The sliding component 21 further includes two upright plates 211 disposed on the side of the sliding plate 210 facing the U-shaped opening of the outer shell 20, the two upright plates 211 being arranged along the transverse direction. A plastic component 23 is disposed between each upright plate 211 and the corresponding side wall of the outer shell 20, and the plastic component 23 is located on the side of the partition plate 201 facing away from the bottom of the outer shell 21. The plastic component 23 can be made of PMI foam and has a certain degree of elasticity. When the sliding plate 210 moves back and forth along the transverse direction, the plastic component 23 can provide a certain cushioning effect.

[0024] Furthermore, an arc-shaped protrusion 213 is provided on the side of the sliding plate 21 facing the U-shaped opening of the outer shell 21, and the arc-shaped protrusion 213 is located between the two upright plates 211. An arc-shaped groove 220 is provided on the side of the rotating component 22 facing the sliding plate 21, and the diameters of the contact surfaces of the arc-shaped protrusion 213 and the arc-shaped groove 220 are the same, allowing the rotating component 22 to rotate around the arc-shaped protrusion 213. In practice, when the wall 1 is subjected to the impact of an explosion, due to the deformation of the wall 1, the rotating component 22 at some locations may detach from the arc-shaped protrusion 213.

[0025] Two rows of springs 24 are respectively provided on both sides of the rotating component 22. One end of each spring 24 abuts against the sliding plate 21 and the other end abuts against the rotating component 22. When the rotating component 22 is in the initial position, the spring 24 is just not subjected to external force. When the rotating component 22 rotates, the spring 24 on one side exerts a pushing force on the rotating component 22, and the spring 24 on the other side exerts a pulling force on the rotating component 22.

[0026] Furthermore, a first limiting plate 212 extending towards each other is provided on the side of the two upright plates 211 opposite to the sliding plate 210, and a second limiting plate 221 is provided on both sides of the rotating component 22 along the lateral direction. When the rotating component 22 rotates to its limit position, the first limiting plate 212 can prevent the second limiting plate 221 from continuing to rotate, thus preventing the rotating component 22 from detaching from the sliding component 21. In practice, since the wall 1 itself has a certain strength, in some application scenarios where the strength requirement is not high, the first limiting plate 212 and the second limiting plate 221 may not be necessary.

[0027] A cover plate 27 is provided on the side of the plastic component 23 facing away from the partition plate 201. One side of the cover plate 27 is fixed to the upright plate 211, and the other end is fixed to the outer shell 20. In order to ensure the normal movement of the sliding plate 210, a strip hole (not shown) can be provided at the connection between the cover plate 27 and the upright plate 211 or the outer shell 20. The strip hole extends along the transverse direction, so that the cover plate 27 can be fixed and the sliding plate 210 can move normally.

[0028] When an explosion occurs, the buffer support 2 can be considered a dynamic response system. The horizontal movement of the sliding component 21, combined with the deformation of the plastic component 23, avoids the peak explosion load mainly through its own deformation, while simultaneously consuming the explosion energy. The swinging of the rotating component 22, in coordination with the first elastic component 24, buffers the deformation of the wall. This utility model's explosion-proof wall for offshore oil and gas platforms uses multiple energy dissipation measures to buffer, convert, and consume the explosion impact energy, preventing all the explosion energy from acting on the bottom connection point of the wall 1 and avoiding the overall detachment and destruction of the wall 1.

[0029] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A blast-proof wall for offshore platforms with energy-dissipating buffer supports, characterized in that, include: Walls; A buffer support is installed on the edge of the wall, and the length of the buffer support on each side of the wall is equal to the length of the corresponding wall section; the buffer support includes: The outer shell has a U-shaped cross-section, with the opening of the U-shape facing the wall; A sliding component is disposed within the U-shape of the outer casing and is capable of sliding back and forth relative to the outer casing in the thickness direction of the wall. The rotating component is connected to the wall on one side and to the sliding component on the other side.

2. The explosion-proof wall for offshore platforms with energy-dissipating buffer supports according to claim 1, characterized in that, A partition plate is provided on the two inner side walls of the U-shape of the outer shell, and the partition plate and the bottom of the outer shell form a sliding groove; the sliding component includes a sliding plate, and the two sides of the sliding plate along the thickness direction can be inserted into the corresponding sliding groove and slide back and forth in the sliding groove along the thickness direction.

3. The explosion-proof wall for offshore platforms with energy-dissipating buffer supports according to claim 2, characterized in that, The sliding component further includes two upright plates disposed on one side of the sliding plate facing the U-shaped opening of the outer shell, the two upright plates being arranged along the thickness direction; a plastic component is disposed between each upright plate and the corresponding side wall of the outer shell, and the plastic component is located on the side of the partition plate facing away from the bottom of the outer shell.

4. The explosion-proof wall for offshore platforms with energy-dissipating buffer supports according to claim 3, characterized in that, An arc-shaped protrusion is provided on the side of the sliding plate facing the U-shaped opening of the outer shell, and the arc-shaped protrusion is located between the two upright plates; an arc-shaped groove is provided on the side of the rotating component facing the sliding plate, and the diameter of the contact surface of the arc-shaped protrusion and the arc-shaped groove is the same, and the rotating component can rotate around the arc-shaped protrusion.

5. A marine platform explosion-proof wall with energy-dissipating buffer support according to claim 4, characterized in that, Two rows of springs are provided on both sides of the rotating component. One end of each spring abuts against the sliding plate, and the other end abuts against the rotating component. When the rotating component is in the initial position, the spring is not subjected to any external force. When the rotating component rotates, the spring on one side exerts a pushing force on the rotating component, and the spring on the other side exerts a pulling force on the rotating component.

6. A marine platform explosion-proof wall with energy-dissipating buffer support according to claim 5, characterized in that, A cover plate is provided on the side of the plastic component facing away from the partition plate. One side of the cover plate is fixed to the upright plate, and the other end is fixed to the outer shell.

7. A marine platform explosion-proof wall with energy-dissipating buffer support according to claim 6, characterized in that, A strip-shaped hole is provided at the connection between the cover plate and the upright plate or the outer shell, and the strip-shaped hole extends laterally.

Images