A connecting member for steel structure reinforcement on an offshore platform

Abstract

The present invention relates to a steel structure connection node, and specifically discloses a connecting member for steel structure reinforcement on an offshore platform, which includes a vertically arranged steel column and a horizontally arranged cross beam. The steel column and the cross beam are connected by an L-shaped connecting member, and an energy dissipation component is provided on the L-shaped connecting member. The energy dissipation component has two states: State 1, the energy dissipation component can rigidly support the two flat plates of the L-shaped connecting member; State 2, the energy dissipation component can flexibly support the two flat plates of the L-shaped connecting member. The present invention drives the energy dissipation component to switch between the two states through a switching component, which can not only keep the steel structure stable under the impact of small waves and enhance the resistance of the steel structure to the impact force of small waves, but also consume the stress on the cross beam through the energy dissipation component when the steel structure is subjected to stress beyond the preset service stress range of the steel, so as to prevent the steel structure from deforming and displacing due to excessive stress.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure connection nodes, and specifically to a connecting member for steel structure reinforcement on an offshore platform. Background Art

[0002] Steel structure connecting members are components used to connect various components in a steel structure (such as steel beams, steel columns, trusses, etc.). Their function is to transfer loads in the structure and ensure the stability and integrity of the structure;

[0003] For example, in Chinese Patent CN117468587B, this steel structure connecting member fixes the connecting member through multiple reinforcement methods, so that after the beam-column assembly is completed, the connecting member is not likely to loosen, thus ensuring the stability of the beam-column assembly, replacing the traditional method of using multiple bolts to fix the connecting member, making the beam-column assembly not only convenient and fast, but also strong in stability.

[0004] However, for steel structure connecting members applicable to offshore platforms, due to considering the particularity of the marine environment, the connecting members for reinforcement should also consider the influence of the environment on the material properties. For example, offshore platforms are long-term affected by the impact force of tides or waves. The direct transmission of the impact force may cause deformation or displacement of the steel structure, resulting in mutual extrusion between the steel column and the cross beam, leading to instability of the steel structure and other phenomena. Summary of the Invention

[0005] The purpose of the present invention is to provide a connecting member for steel structure reinforcement on an offshore platform to solve at least one technical problem existing in the above-mentioned prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A connecting member for steel structure reinforcement on an offshore platform, including a vertically arranged steel column and a horizontally arranged cross beam. The steel column and the cross beam are connected by an L-shaped connecting member, and an energy dissipation component is provided on the L-shaped connecting member. The energy dissipation component has two states:

[0007] State 1, the energy dissipation component can rigidly support the two flat plates of the L-shaped connecting member;

[0008] State 2, the energy dissipation component can flexibly support the two flat plates of the L-shaped connecting member;

[0009] It further includes a switching component, and the switching component is used to drive the energy dissipation component to switch between the two states.

[0010] Preferably, the energy-consuming component includes two support rods respectively rotatably installed on the outer walls of the two flat plates of the L-shaped connecting piece. A sleeve is slidably sleeved between the two support rods. A compression spring is provided between the two support rods located inside the sleeve. The sleeve is also filled with a filling liquid, and the switching component can suck out or squeeze the filling liquid into the sleeve.

[0011] Preferably, the switching component includes a first rotating plate rotatably installed on the outer wall of one of the flat plates of the L-shaped connecting piece. A chute is formed on the top surface of the other flat plate of the L-shaped connecting piece. A slider is slidably installed in the chute. A second rotating plate is rotatably installed between one end of the first rotating plate and the top surface of the slider. A tension spring is provided between the mutually remote ends of the first rotating plate and the second rotating plate. Through grooves are formed on the surfaces of the first rotating plate and the second rotating plate. A liquid-changing part communicating with the sleeve is provided in the through groove, and the liquid-changing part is used to suck out or squeeze the filling liquid into the sleeve;

[0012] It further includes a driving part for driving the slider to move.

[0013] Preferably, the driving part includes an electromagnet fixedly installed on the side wall of the chute, and the electromagnet is electrically connected to an external vibration detection mechanism. A magnetic block capable of repelling the electromagnet is provided at one end of the slider close to the electromagnet. An elastic telescopic rod is provided in a through hole formed in the L-shaped connecting piece, and the elastic telescopic rod is fixed to the cross beam. A slot for the elastic telescopic rod to insert is formed on the bottom surface of the slider.

[0014] Preferably, the liquid-changing part includes a piston chamber rotatably installed in the through groove of the first rotating plate. A piston rod is slidably installed in the piston chamber. One end of the piston rod is rotatably installed in the through groove of the second rotating plate. The side wall of the piston chamber close to the piston rod is mutually communicated with the sleeve through an elastic hose.

[0015] Preferably, the liquid-changing part includes a sector-shaped airbag located in the through groove and fixedly installed on the inner side walls of the first rotating plate and the second rotating plate at both ends respectively. The sector-shaped airbag is communicated with the sleeve through an elastic hose.

[0016] Preferably, a plurality of anti-buckling ribs are provided at the connection between the two flat plates of the L-shaped connecting piece.

[0017] Preferably, the energy-consuming component includes an energy-consuming steel section fixedly installed between the outer walls of the two flat plates of the L-shaped connecting piece. A plurality of groups of reinforcing ribs are provided on the outer wall of the energy-consuming steel section.

[0018] Preferably, the filling liquid in the sleeve is selected from mineral oil or emulsion.

[0019] Preferably, when the first rotating plate and the second rotating plate are in the same straight line, they are parallel to the sleeve.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The present invention drives the energy-consuming component to switch between two states through the switching component. It can not only keep the steel structure stable under the impact of small waves and enhance the resistance of the steel structure to the impact force of small waves, but also when the stress on the steel structure exceeds the preset allowable stress range of the steel, the energy-consuming component consumes the stress on the cross beam to avoid the steel structure from deforming and displacing due to excessive stress, resulting in instability of the steel structure and affecting the operation of the offshore platform.

[0022] 2. The present invention sucks or squeezes the filling liquid into the sleeve through the switching component, thereby completing the switching of the energy-consuming component between two states. When the energy-consuming component is in state two, it can consume the stress transmitted from the cross beam to the L-shaped connecting piece by compressing the compression spring, avoiding the increase of internal stress due to the impact of waves on the cross beam, resulting in shaking, and further causing displacement or deformation due to mutual extrusion between the cross beam and the steel column, and causing the L-shaped connecting piece to yield, resulting in a reduction in the connection strength between the cross beam and the steel column and affecting the stability of the steel structure.

[0023] 3. The present invention drives the reciprocating sliding of the slider through the driving part, so that the first rotating plate and the second rotating plate switch between being in the same straight line and being bent, and compress or stretch the liquid-changing part. By using the air pressure change in the liquid-changing part, the filling liquid in the sleeve is sucked out or squeezed in, completing the limiting or contact locking of the two support rods, so as to achieve the purpose of switching the energy-consuming section between two states as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structure schematic diagram of the present invention;

[0025] Figure 2 is a sectional view of the three-dimensional structure of the present invention;

[0026] Figure 3 is a three-dimensional structure schematic diagram of Embodiment 1 of the energy-consuming component in the present invention;

[0027] Figure 4 is a three-dimensional structure schematic diagram of Embodiment 2 of the energy-consuming component in the present invention;

[0028] Figure 5 is a structure schematic diagram of the first rotating plate and the second rotating plate in the present invention;

[0029] Figure 6 is a sectional schematic diagram of the energy-consuming component in Embodiment 1 of the present invention in state one;

[0030] Figure 7 is a sectional schematic diagram of the energy-consuming component in Embodiment 1 of the present invention in state two;

[0031] Figure 8 This is a schematic cross-sectional view of the second embodiment of the liquid changing part of the present invention.

[0032] In the figure: 1, steel column; 2, cross beam; 3, L-shaped connecting piece; 4, first rotating plate; 5, second rotating plate; 6, through groove; 7, tension spring; 8, piston cavity; 9, piston rod; 10, support rod; 11, sleeve; 12, compression spring; 13, flexible hose; 14, anti-buckling rib; 15, slider; 16, elastic telescopic rod; 17, chute; 18, electromagnet; 19, energy-dissipating steel section; 20, reinforcing rib; 21, sector airbag. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] Please refer to Figures 1 to 8 , the present invention provides a technical solution: a connecting member for steel structure reinforcement on an offshore platform, including a vertically arranged steel column 1 and a horizontally arranged cross beam 2. The steel column 1 and the cross beam 2 are connected by an L-shaped connecting piece 3. An energy-dissipating component is provided on the L-shaped connecting piece 3, and the energy-dissipating component has two states:

[0035] State 1, the energy-dissipating component can rigidly support the two flat plates of the L-shaped connecting piece 3;

[0036] State 2, the energy-dissipating component can flexibly support the two flat plates of the L-shaped connecting piece 3;

[0037] It further includes a switching component for driving the energy-dissipating component to switch between the two states.

[0038] When this device is in use, first vertically position and fix the steel column 1, and then horizontally connect the cross beam 2 to the side wall of the steel column 1 through the L-shaped connecting piece 3 (the two flat plates on the L-shaped connecting piece 3 can be fixed to the steel column 1 and the cross beam 2 respectively by bolts, etc.), thus completing the reinforcement connection of the offshore platform steel structure. At this time, the energy-dissipating component switches to State 1 and rigidly supports the two flat plates of the L-shaped connecting piece 3, so that the impact force of small waves on the steel column 1 and the cross beam 2 cannot cause the steel structure to deform or displace, playing a role in fixing, supporting and stabilizing the connection between the steel column 1 and the cross beam 2.

[0039] When the impact force of the wave on the L-shaped connecting member 3 exceeds the preset allowable stress range of the steel, the switching assembly drives the energy dissipation assembly to switch to state two. The energy dissipation assembly can flexibly support the two flat plates of the L-shaped connecting member 3, and consume the stress on the cross beam 2 through the flexible support, so as to prevent the stress on the cross beam 2 from being transmitted to the steel column 1, and avoid the deformation and displacement caused by the mutual extrusion of the steel column 1 and the cross beam 2 under the action of the wave impact, resulting in the instability of the steel structure.

[0040] In this way, by driving the energy dissipation assembly to switch between two states by the switching assembly, the steel structure can be kept stable under the impact of small waves, enhancing the resistance of the steel structure to the impact force of small waves. When the stress on the steel structure exceeds the preset allowable stress range of the steel, the stress on the cross beam 2 can be consumed by the energy dissipation assembly, avoiding the deformation and displacement of the steel structure caused by excessive stress, resulting in the instability of the steel structure and affecting the operation of the offshore platform.

[0041] Embodiment 1:

[0042] Further, the energy dissipation assembly includes two support rods 10 respectively rotatably installed on the outer walls of the two flat plates of the L-shaped connecting member 3. A sleeve 11 is slidably sleeved between the two support rods 10. A compression spring 12 is provided between the two support rods 10 located in the sleeve 11. The sleeve 11 is also filled with a filling liquid, and the switching assembly can suck out or squeeze the filling liquid into the sleeve 11.

[0043] According to the above embodiment, a specific embodiment of the energy dissipation assembly is provided. For details, please refer to Figure 3 and Figure 6 , when the switching assembly squeezes the filling liquid into the sleeve 11, the energy dissipation assembly switches to state one at this time. Since the sleeve 11 is filled with liquid, the two support rods 10 cannot approach each other, that is, the two support rods 10 and the sleeve 11 together form a rigid support member to rigidly support the two flat plates of the L-shaped connecting member 3, thus increasing the stability between the steel column 1 and the cross beam 2. When the switching assembly sucks the filling liquid out of the sleeve 11, the energy dissipation assembly switches to state two at this time. Since the liquid in the sleeve 11 decreases, when the two support rods 10 are subjected to the stress transmitted from the cross beam 2 to the L-shaped connecting member 3, they will approach each other and compress the compression spring 12, consuming the stress transmitted from the cross beam 2 to the L-shaped connecting member 3 through the compression spring 12, avoiding the increase of the internal stress of the cross beam 2 caused by the wave impact and resulting in shaking, so as to prevent the mutual extrusion and displacement or deformation between the cross beam 2 and the steel column 1, resulting in the instability of the steel structure.

[0044] In this way, by using the switching component to suck out or squeeze the filling liquid into the sleeve 11, the switching of the energy-consuming component between the two states in the above text can be completed, enabling the energy-consuming component to consume the stress transmitted from the cross beam 2 to the L-shaped connecting piece 3 by compressing the compression spring 12 in state two, avoiding the increase in internal stress caused by the impact of waves on the cross beam 2, which may lead to shaking, and further preventing the mutual extrusion between the cross beam 2 and the steel column 1 from causing displacement or deformation, and the yielding of the L-shaped connecting piece 3 resulting in a reduction in the connection strength between the cross beam 2 and the steel column 1, thus affecting the stability of the steel structure.

[0045] Further, the switching component includes a first rotating plate 4 rotatably mounted on the outer wall of one of the flat plates of the L-shaped connecting piece 3. A chute 17 is formed on the top surface of the other flat plate of the L-shaped connecting piece 3. A slider 15 is slidably mounted in the chute 17. One end of the first rotating plate 4 is rotatably mounted to the top surface of the slider 15 through a second rotating plate 5. A tension spring 7 is provided between the mutually remote ends of the first rotating plate 4 and the second rotating plate 5. Through grooves 6 are formed on the surfaces of the first rotating plate 4 and the second rotating plate 5. A liquid changing part communicating with the sleeve 11 is provided in the through groove 6, and the liquid changing part is used for sucking out or squeezing the filling liquid into the sleeve 11.

[0046] It further includes a driving part for driving the slider 15 to move.

[0047] According to the above embodiments, a specific embodiment of the switching component is provided. Specifically, refer to Figure 3 and Figure 5 When the driving part drives the slider 15 to slide to the rightmost side, at this time, the first rotating plate 4 and the second rotating plate 5 are in a straight line, and the liquid changing part is compressed, so that the filling liquid in the liquid changing part enters the sleeve 11, completing the switching of the energy-consuming section to state one in the above text. Since the first rotating plate 4 and the second rotating plate 5 are in a straight line at this time, the axial torque received by the tension spring 7 is zero, which will keep the first rotating plate 4 and the second rotating plate 5 in a straight line.

[0048] When the driving part drives the slider 15 to slide to the left, at this time, the first rotating plate 4 and the second rotating plate 5 start to rotate relative to each other to a bent state, and the liquid changing part is stretched. The internal space of the liquid changing part increases, sucking the filling liquid out of the sleeve 11, completing the switching of the energy-consuming section to state two in the above text. At this time, the tension spring 7 starts to contract, accelerating the rotation speed of the first rotating plate 4 and the second rotating plate 5, and quickly completing the release of the limit on the two support rods 10.

[0049] In this way, by driving the reciprocating sliding of the slider 15 by the driving part, the first rotating plate 4 and the second rotating plate 5 are switched between being in a straight line and being bent with each other, and the liquid changing part is compressed or stretched. The air pressure change in the liquid changing part is used to suck out or squeeze in the filling liquid in the sleeve 11, and the two support rods 10 are limited or contact-locked, so as to achieve the purpose of switching the energy-consuming section between the two states in the above text. And because the first rotating plate 4 and the second rotating plate 5 are parallel to the sleeve 11 when they are in a straight line, the two flat plates of the L-shaped connecting piece 3 can be supported by the first rotating plate 4, the second rotating plate 5 and the energy-consuming component together, further improving the structural stability of the energy-consuming component in state one.

[0050] It is worth mentioning that since the axial torque of the tension spring 7 is zero when the first rotating plate 4 and the second rotating plate 5 are in a straight line, a radial force needs to be applied to the tension spring 7 before the first rotating plate 4 and the second rotating plate 5 rotate relative to each other to break through the rotation limit of the tension spring 7 on the first rotating plate 4 and the second rotating plate 5, so as to avoid mis-touch when the L-shaped connecting piece 3 is subjected to instantaneous stress exceeding the preset range, and make the first rotating plate 4 and the second rotating plate 5 start to rotate relative to each other immediately.

[0051] Furthermore, the driving part includes an electromagnet 18 fixedly installed on the side wall of the sliding groove 17, and the electromagnet 18 is electrically connected to an external vibration detection mechanism. One end of the slider 15 close to the electromagnet 18 is provided with a magnetic block that can repel the electromagnet 18. An elastic telescopic rod 16 is arranged in a through hole opened in the L-shaped connecting piece 3, and the elastic telescopic rod 16 is fixed to the cross beam 2. A slot for the elastic telescopic rod 16 to insert is opened on the bottom surface of the slider 15.

[0052] According to the above embodiment, a specific embodiment of the driving part is provided. When the energy-consuming component is in state one, at this time, the elastic telescopic rod 16 is inserted into the slider 15 to limit the slider 15. When the cross beam 2 is subjected to a wave impact exceeding a high strength, the internal stress increases and slight vibration begins to occur. When the stress received by the cross beam 2 exceeds the preset range (that is, the vibration amplitude exceeds the compression limit of the elastic telescopic rod 16), at this time, the elastic telescopic rod 16 disengages from the slider 15 and releases the limit on the slider 15. When the tension spring 7 is also subjected to radial stress and begins to contract, it will pull the slider 15 to slide in the sliding groove 17, drive the first rotating plate 4 and the second rotating plate 5 to rotate relative to each other, so that the energy-consuming component is switched to state two, and the corresponding stress is consumed through elastic support. When the external vibration detection mechanism detects that the vibration amplitude of the cross beam 2 decreases to the preset range, at this time, the electromagnet 18 is energized to repel the slider 15 back to its original position, and the slider 15 is locked through the elastic telescopic rod 16, and the energy-consuming component can be switched to state one.

[0053] In this way, by switching the energy-consuming component to State 2, although a certain stability of the connecting piece is sacrificed, a large amount of impact stress is consumed through the flexible support, preventing the connecting piece from yielding and resulting in a reduction in connection strength or disconnection, enabling the connecting piece to be reused multiple times and improving the service life of the connecting piece.

[0054] Further, the liquid-changing part includes a piston chamber 8 rotatably installed in the through groove 6 of the first rotating plate 4. A piston rod 9 is slidably installed in the piston chamber 8. One end of the piston rod 9 is rotatably installed in the through groove 6 of the second rotating plate 5. The side wall of the piston chamber 8 close to the piston rod 9 is interconnected with the sleeve 11 through an elastic hose 13.

[0055] According to the above embodiment, a specific embodiment of the liquid-changing part is provided. When the first rotating plate 4 and the second rotating plate 5 are in a straight line, at this time, the piston rod 9 is farthest from the piston chamber 8. At this time, the space on one side of the piston chamber 8 is compressed and the filling liquid is squeezed into the sleeve 11 through the elastic hose 13 to complete the limitation of the two support rods 10. When the first rotating plate 4 and the second rotating plate 5 rotate relative to each other, at this time, the piston rod 9 slides in the piston chamber 8, the space on one side of the piston chamber 8 increases and sucks in the piston chamber 8 through the elastic hose 13, releasing the limitation of the two support rods 10 and completing the switching of the energy-consuming component between the two states.

[0056] Embodiment 2:

[0057] Further, the liquid-changing part includes a sector-shaped airbag 21 located in the through groove 6 and fixedly installed on the inner side walls of the first rotating plate 4 and the second rotating plate 5 at both ends respectively. The sector-shaped airbag 21 is connected to the sleeve 11 through an elastic hose 13.

[0058] According to the above embodiment, a second specific embodiment of the liquid-changing part is provided. When the first rotating plate 4 and the second rotating plate 5 are in a straight line, at this time, the sector-shaped airbag 21 is squeezed and in a contracted state, and the filling liquid in the sector-shaped airbag 21 is squeezed into the sleeve 11 through the elastic hose 13 to complete the limitation of the two support rods 10. When the first rotating plate 4 and the second rotating plate 5 rotate relative to each other, the sector-shaped airbag 21 is driven to start expanding. At this time, the internal pressure of the sector-shaped airbag 21 decreases and sucks into the sector-shaped airbag 21 through the elastic hose 13, releasing the limitation of the two support rods 10 and completing the switching of the energy-consuming component between the two states.

[0059] Compared with Embodiment 1, the structural stability of this embodiment is somewhat reduced, but the rate of the filling liquid entering or sucking out of the sleeve 11 is increased, the switching rate of the energy-consuming component is increased, that is, the sensitivity of the energy-consuming component to stress is increased, and the energy-consuming component is prevented from being unable to complete the switching in time due to excessive instantaneous stress.

[0060] Further, a plurality of anti-buckling ribs 14 are provided at the connection between the two flat plates of the L-shaped connecting member 3.

[0061] According to the above embodiment, to prevent the L-shaped connecting member 3 from yielding and deforming due to the stress transmitted by the cross beam 2, which may cause the energy dissipation component to fail to reset properly, a plurality of anti-buckling ribs 14 are provided at the connection between the two flat plates of the L-shaped connecting member 3 to prevent the L-shaped connecting member 3 from bending at the connection of the two flat plates.

[0062] Further, the energy dissipation component includes an energy dissipation steel section 19 fixedly installed between the outer walls of the two flat plates of the L-shaped connecting member 3, and a plurality of groups of reinforcing ribs 20 are provided on the outer wall of the energy dissipation steel section 19.

[0063] According to the above embodiment, a second specific embodiment of the energy dissipation component is provided. When the stress received by the cross beam 2 exceeds the bearing limit of the reinforcing ribs 20, the reinforcing ribs 20 will break, switching to state two. The energy dissipation steel section 19 without the support of the reinforcing ribs 20 can then consume the stress on the L-shaped connecting member 3 through its own yield.

[0064] Compared with the first embodiment, this embodiment is a one-time solution. Although it sacrifices the reusability of the energy dissipation component, since the stress consumption ability of the energy dissipation steel section 19 far exceeds that of the compression spring 12, the stress consumption limit of the device is improved, and it can be selected as appropriate in actual use.

[0065] Further, the filling liquid in the sleeve 11 is selected from mineral oil or emulsion.

[0066] Since the filling liquid in the sleeve 11 needs to limit the two support rods 10, a liquid that is not easily compressible needs to be selected. And to prevent the piston rod 9 from being unable to slide in the piston chamber 8, the filling liquid also needs to have a certain lubricating effect. In this embodiment, mineral oil or emulsion is preferably selected.

[0067] Further, when the first rotating plate 4 and the second rotating plate 5 are in the same straight line, they are parallel to the sleeve 11.

[0068] According to the above embodiment, since the first rotating plate 4 and the second rotating plate 5 are parallel to the sleeve 11 when they are in the same straight line, the two flat plates of the L-shaped connecting member 3 can be supported together by the first rotating plate 4, the second rotating plate 5 and the energy dissipation component, further improving the structural stability of the energy dissipation component in state one.

[0069] The standard parts used in this embodiment can be directly purchased from the market, and the non-standard structural components described in the specification and drawings can also be directly processed without doubt according to the existing common technical knowledge. At the same time, the connection methods of each component adopt the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt the conventional models in the existing technology. Therefore, no specific description will be made here.

[0070] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A connecting member for steel structure reinforcement on an offshore platform, comprising a vertically arranged steel column (1) and a horizontally arranged cross beam (2), wherein the steel column (1) and the cross beam (2) are connected by an L-shaped connecting member (3), and it is characterized in that: The L-shaped connecting member (3) is provided with an energy dissipation component, and the energy dissipation component has two states: State 1, the energy dissipation component can rigidly support the two flat plates of the L-shaped connecting member (3); State 2, the energy dissipation component can flexibly support the two flat plates of the L-shaped connecting member (3); It further includes a switching component, and the switching component is used to drive the energy dissipation component to switch between the two states; The energy dissipation component includes two support rods (10) respectively rotatably installed on the outer walls of the two flat plates of the L-shaped connecting member (3). A sleeve (11) is slidably sleeved between the two support rods (10). A compression spring (12) is provided between the two support rods (10) located in the sleeve (11). The sleeve (11) is also provided with a filling liquid, and the switching component can suck out or squeeze the filling liquid into the sleeve (11); The switching component includes a first rotating plate (4) rotatably installed on the outer wall of one of the flat plates of the L-shaped connecting member (3). A sliding groove (17) is formed on the top surface of the other flat plate of the L-shaped connecting member (3). A slider (15) is slidably installed in the sliding groove (17). A second rotating plate (5) is rotatably installed between one end of the first rotating plate (4) and the top surface of the slider (15). A tension spring (7) is provided between the mutually remote ends of the first rotating plate (4) and the second rotating plate (5). Through grooves (6) are formed on the surfaces of the first rotating plate (4) and the second rotating plate (5). A liquid changing part communicating with the sleeve (11) is arranged in the through groove (6), and the liquid changing part is used to suck out or squeeze the filling liquid into the sleeve (11); It further includes a driving part for driving the slider (15) to move.

2. The connecting member for steel structure reinforcement on the marine engineering platform according to claim 1, wherein: The driving part includes an electromagnet (18) fixedly installed on the side wall of the sliding groove (17), and the electromagnet (18) is electrically connected to an external vibration detection mechanism. A magnetic block capable of repelling the electromagnet (18) is provided at one end of the slider (15) close to the electromagnet (18). An elastic telescopic rod (16) is arranged in a through hole formed in the L-shaped connecting member (3), and the elastic telescopic rod (16) is fixed to the cross beam (2). A slot for the elastic telescopic rod (16) to insert is formed on the bottom surface of the slider (15).

3. The connecting member for steel structure reinforcement on an offshore platform according to claim 1, wherein: The liquid changing part includes a piston chamber (8) rotatably installed in the through groove (6) of the first rotating plate (4). A piston rod (9) is slidably installed in the piston chamber (8). One end of the piston rod (9) is rotatably installed in the through groove (6) of the second rotating plate (5). The side wall of the piston chamber (8) close to the piston rod (9) is mutually communicated with the sleeve (11) through an elastic hose (13).

4. The connecting member for steel structure reinforcement on an offshore platform according to claim 1, wherein: The liquid changing part includes a sector-shaped air bag (21) located in the through groove (6) and fixedly installed on the inner side walls of the first rotating plate (4) and the second rotating plate (5) at both ends respectively. The sector-shaped air bag (21) is communicated with the sleeve (11) through an elastic hose (13).

5. The connecting member for steel structure reinforcement on the marine engineering platform according to claim 1, characterized in that: A plurality of anti-buckling ribs (14) are arranged at the joint between the two flat plates of the L-shaped connecting member (3).

6. The connecting member for steel structure reinforcement on an offshore platform according to claim 1, characterized in that: The energy-consuming component includes an energy-consuming steel section (19) fixedly installed between the outer walls of two flat plates of the L-shaped connecting piece (3), and multiple groups of reinforcing ribs (20) are arranged on the outer wall of the energy-consuming steel section (19).

7. The connecting member for steel structure reinforcement on an offshore platform according to claim 1, characterized in that: The filling liquid in the sleeve (11) is selected from mineral oil or emulsion.

8. The connecting member for steel structure reinforcement on an offshore platform according to claim 1, characterized in that: When the first rotating plate (4) and the second rotating plate (5) are in the same straight line, they are parallel to the sleeve (11).

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