Connecting component for reinforcing steel structure on maritime work platform

Abstract

The invention relates to a steel structure connecting node, and particularly discloses a connecting member for reinforcing a steel structure on a maritime work platform, the connecting member comprises a vertically arranged steel column and a horizontally arranged cross beam, the steel column and the cross beam are connected through an L-shaped connecting piece, the L-shaped connecting piece is provided with an energy consumption assembly, and the energy consumption assembly has two states: the first state, the second state, the third state and the fourth state; the energy consumption assembly can rigidly support the two flat plates of the L-shaped connecting piece. And in the second state, the energy consumption assembly can flexibly support the two flat plates of the L-shaped connecting piece. The energy dissipation assembly is driven by the switching assembly to be switched between the two states, the steel structure can be kept stable under the impact of small waves, the resistance of the steel structure to the impact force of the small waves is enhanced, and when the steel structure is subjected to the stress range exceeding the preset using stress range of steel, the steel structure can be prevented from being damaged. The stress on the cross beam is consumed through the energy consumption assembly, and deformation and displacement of the steel structure caused by overlarge stress are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure connection nodes, in particular to a connection component for reinforcing a steel structure on an offshore platform. Background Art

[0002] Steel structure connection components are used to connect various components in steel structures (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, the steel structure connecting member is fixed by multiple reinforcement methods, so that after the beam and column are assembled, the connecting member is not easy to loosen, thereby ensuring the stability of the beam and column assembly, replacing the traditional method of fixing the connecting member with multiple bolts, making the assembly of beams and columns not only convenient and fast, but also stable.

[0004] However, due to the particularity of the marine environment, the steel structure connection components suitable for offshore platforms should also take into account the impact of the environment on material properties. For example, offshore platforms are subjected to the impact of tides or waves for a long time. The direct transmission of impact force may cause deformation or displacement of the steel structure, resulting in mutual squeezing between steel columns and beams, causing instability of the steel structure. Summary of the invention

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

[0006] To achieve the above object, the present invention provides the following technical solution: A connecting member for reinforcing a steel structure on an offshore platform, comprising a vertically arranged steel column and a horizontally arranged crossbeam, wherein the steel column and the crossbeam are connected by an L-shaped connecting piece, and an energy dissipation component is provided on the L-shaped connecting piece, and the energy dissipation component has two states:

[0007] State 1: the energy dissipation component can rigidly support the two plates of the L-shaped connector;

[0008] State 2: the energy dissipation component can flexibly support the two plates of the L-shaped connector;

[0009] It also includes a switching component, which is used to drive the energy-consuming component to switch between two states.

[0010] Preferably, the energy-absorbing component comprises two support rods rotatably mounted on the outer walls of the two flat plates of the L-shaped connecting piece respectively, a sleeve is arranged between the two support rods through a sliding sleeve, a compression spring is arranged between the two support rods located in the sleeve, and a filling liquid is also arranged in the sleeve, and the switching component can suck out or squeeze the filling liquid into the sleeve.

[0011] Preferably, the switching assembly comprises a first rotating plate rotatably mounted on the outer wall of one of the flat plates of the L-shaped connecting member, a slide groove is provided on the top surface of the other flat plate of the L-shaped connecting member, a slider is slidably mounted in the slide groove, a second rotating plate is rotatably mounted between one end of the first rotating plate and the top surface of the slider, a tension spring is provided between the ends of the first rotating plate and the second rotating plate that are away from each other, a through groove is provided on the surface of the first rotating plate and the second rotating plate, a liquid changing portion connected to the sleeve is provided in the through groove, and the liquid changing portion is used to suck out or squeeze the filling liquid into the sleeve;

[0012] The utility model also comprises a driving part for driving the slider to move.

[0013] Preferably, the driving part includes an electromagnet fixedly mounted on the side wall of the slide groove, and the electromagnet is electrically connected to the external vibration detection mechanism, one end of the electromagnet close to the slider is provided with a magnetic block that can repel the electromagnet, an elastic telescopic rod is provided in the through hole opened in the L-shaped connecting piece, and the elastic telescopic rod is fixed to the cross beam, and a slot for inserting the elastic telescopic rod is provided on the bottom surface of the slider.

[0014] Preferably, the fluid exchange part includes a piston chamber rotatably installed in the 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 groove of the second rotating plate, and the side wall of the piston chamber close to the piston rod is connected to the sleeve through an elastic hose.

[0015] Preferably, the liquid exchange portion comprises a fan-shaped air bag located in the through groove and with two ends respectively fixedly mounted on the inner side wall of the first rotating plate and the inner side wall of the second rotating plate, and the fan-shaped air bag is connected to 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 dissipation component comprises an energy dissipation steel section fixedly mounted between two flat plate outer walls of the L-shaped connector, and the outer wall of the energy dissipation steel section is provided with a plurality of groups of reinforcing ribs.

[0018] Preferably, the filling liquid in the sleeve is 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 present invention has the following beneficial effects:

[0021] 1. The present invention drives the energy-dissipating component to switch between two states through a switching component, which can not only keep the steel structure stable under the impact of small waves and enhance the steel structure's resistance to the impact of small waves, but also consume the stress on the beam through the energy-dissipating component when the steel structure is subjected to stress exceeding the preset use stress range of the steel material, thereby avoiding deformation and displacement of the steel structure due to excessive stress, resulting in instability of the steel structure and affecting the operation of the offshore platform.

[0022] 2. The present invention can complete the switching of the energy-absorbing component between the two states by sucking out or squeezing the filling liquid into the sleeve through the switching component, so that the energy-absorbing component can transmit the stress of the beam to the L-shaped connecting piece through the compression spring in the second state, so as to avoid the beam from shaking due to the increase of internal stress caused by the impact of waves, thereby causing the mutual squeezing between the beam and the steel column to produce displacement or deformation, and causing the L-shaped connecting piece to yield, resulting in a reduction in the connection strength between the beam and the steel column, which affects the stability of the steel structure.

[0023] 3. The present invention drives the slider to slide back and forth through the driving part, so that the first rotating plate and the second rotating plate switch between being in the same straight line and bending to each other, and compress or stretch the liquid exchange part, and use the air pressure change in the liquid exchange part to complete the suction or squeezing of the filling liquid in the sleeve, and complete the limiting or contact locking of the two support rods, so as to achieve the purpose of switching the energy consumption section between the two states mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the second embodiment of the energy dissipation component in the present invention;

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

[0029] Figure 6 It is a cross-sectional schematic diagram of the energy-consuming component in the first embodiment of the present invention at the first state;

[0030] Figure 7 It is a cross-sectional schematic diagram of the energy-consuming component in the first embodiment of the present invention in the second state;

[0031] Figure 8 It is a cross-sectional schematic diagram of the second embodiment of the liquid replacement part of the present invention.

[0032] In the figure: 1. steel column; 2. crossbeam; 3. L-shaped connector; 4. first rotating plate; 5. second rotating plate; 6. through groove; 7. tension spring; 8. piston chamber; 9. piston rod; 10. support rod; 11. sleeve; 12. compression spring; 13. elastic hose; 14. anti-buckling rib; 15. slider; 16. elastic telescopic rod; 17. slide groove; 18. electromagnet; 19. energy-absorbing steel section; 20. reinforcing rib; 21. fan-shaped airbag. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figures 1 to 8 The present invention provides a technical solution: a connecting member for reinforcing a steel structure on an offshore platform, comprising a vertically arranged steel column 1 and a horizontally arranged crossbeam 2, wherein the steel column 1 and the crossbeam 2 are connected by an L-shaped connecting member 3, and an energy dissipation component is provided on the L-shaped connecting member 3, and the energy dissipation component has two states:

[0035] State 1: the energy dissipation component can rigidly support the two plates of the L-shaped connector 3;

[0036] State 2: the energy dissipation component can flexibly support the two plates of the L-shaped connector 3;

[0037] It also includes a switching component, which is used to drive the energy-consuming component to switch between two states.

[0038] When the device is in use, the steel column 1 is firstly positioned and fixed vertically, and then the cross beam 2 is horizontally connected to the side wall of the steel column 1 through the L-shaped connector 3 (the two flat plates on the L-shaped connector 3 can be fixed to the steel column 1 and the cross beam 2 respectively by bolts or the like), thereby completing the reinforced connection of the offshore platform steel structure. At this time, the energy dissipation component is switched to state one, and the two flat plates of the L-shaped connector 3 are rigidly supported, so that the impact force of small waves on the steel column 1 and the cross beam 2 cannot cause deformation or displacement of the steel structure, and the connection between the steel column 1 and the cross beam 2 is fixed, supported and stabilized.

[0039] When the impact force of waves on the L-shaped connector 3 exceeds the preset service stress range of the steel, the switching component drives the energy-absorbing component to switch to state two. The energy-absorbing component can flexibly support the two flat plates of the L-shaped connector 3, and consume the stress on the beam 2 through the flexible support, thereby preventing the stress on the beam 2 from being transmitted to the steel column 1, causing the steel column 1 and the beam 2 to squeeze each other under the action of wave impact to produce deformation and displacement, resulting in instability of the steel structure.

[0040] In this way, by driving the energy-absorbing component to switch between the two states through the switching component, the steel structure can be kept stable when impacted by small waves and its resistance to the impact force of small waves can be enhanced. When the steel structure is subjected to stress exceeding the preset service stress range of the steel material, the stress on the cross beam 2 can be consumed by the energy-absorbing component to avoid deformation and displacement of the steel structure due to excessive stress, which may lead to instability of the steel structure and affect the operation of the offshore platform.

[0041] Embodiment 1:

[0042] Furthermore, the energy dissipation component includes two support rods 10 rotatably mounted on the two flat outer walls of the L-shaped connecting member 3, a sleeve 11 is arranged between the two support rods 10 through a sliding sleeve, a compression spring 12 is arranged between the two support rods 10 located in the sleeve 11, and a filling liquid is also arranged in the sleeve 11, and the switching component can suck out or squeeze the filling liquid into the sleeve 11.

[0043] According to the above embodiment, a specific embodiment of an energy consumption component is provided. Figure 3 and Figure 6 When the switching component squeezes the filling liquid into the sleeve 11, the energy dissipation component switches to state one. Since the sleeve 11 is full of 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, which rigidly supports the two flat plates of the L-shaped connector 3, thereby increasing the stability between the steel column 1 and the beam 2. When the switching component sucks the filling liquid out of the sleeve 11, the energy dissipation component switches to state two. Since the liquid in the sleeve 11 is reduced, the two support rods 10 will approach each other and compress the compression spring 12 when they are subjected to the stress transmitted from the beam 2 to the L-shaped connector 3. The stress transmitted from the beam 2 to the L-shaped connector 3 is consumed by the compression spring 12, thereby preventing the beam 2 from shaking due to the increase in internal stress caused by the impact of waves, thereby causing the beam 2 and the steel column 1 to squeeze each other to produce displacement or deformation, resulting in instability of the steel structure.

[0044] In this way, by switching the component to suck out or squeeze the filling liquid into the sleeve 11, the switching of the energy-absorbing component between the two groups of states mentioned above can be completed, so that the energy-absorbing component can transfer the stress of the beam 2 to the L-shaped connecting piece 3 through the compression spring 12 in the second state to avoid the beam 2 from shaking due to the increase of internal stress caused by the impact of waves, thereby causing the beam 2 and the steel column 1 to squeeze each other to produce displacement or deformation, and the L-shaped connecting piece 3 to yield, resulting in a reduction in the connection strength between the beam 2 and the steel column 1, which affects the stability of the steel structure.

[0045] Further, the switching assembly includes a first rotating plate 4 rotatably mounted on the outer wall of one of the flat plates of the L-shaped connecting member 3, a slide groove 17 is provided on the top surface of the other flat plate of the L-shaped connecting member 3, a slider 15 is slidably installed in the slide 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 ends of the first rotating plate 4 and the second rotating plate 5 that are away from each other, a through groove 6 is provided on the surface of the first rotating plate 4 and the second rotating plate 5, a liquid changing portion connected to the sleeve 11 is provided in the through groove 6, and the liquid changing portion is used to suck out or squeeze the filling liquid into the sleeve 11;

[0046] The device also includes a driving unit for driving the slider 15 to move.

[0047] According to the above embodiment, a specific embodiment of a switching component is provided. Figure 3 and Figure 5 When the driving unit drives the slider 15 to slide to the right to the rightmost side, the first rotating plate 4 and the second rotating plate 5 are in the same straight line, and the liquid exchange part is compressed, so that the filling liquid in the liquid exchange part enters the sleeve 11, completing the switching of the energy consumption section state 1 mentioned above. Since the first rotating plate 4 and the second rotating plate 5 are in the same straight line, the axial torque on the tension spring 7 is zero at this time, which will keep the first rotating plate 4 and the second rotating plate 5 in the same straight line.

[0048] When the driving unit drives the sliding block 15 to slide to the left, the first rotating plate 4 and the second rotating plate 5 begin to rotate relative to each other to a bent state, and stretch the liquid exchange part. The internal space of the liquid exchange part increases to suck the filling liquid out of the sleeve 11, completing the switching of the energy consumption stage state 2 mentioned above. At this time, the tension spring 7 begins to contract, accelerating the rotation rate of the first rotating plate 4 and the second rotating plate 5, and quickly completing the release of the limit of the two support rods 10.

[0049] In this way, the driving unit drives the slider 15 to slide back and forth, so that the first rotating plate 4 and the second rotating plate 5 switch between being in the same straight line and bending to each other, and compress or stretch the liquid exchange part, and use the air pressure change in the liquid exchange part to complete the suction or squeezing of the filling liquid in the sleeve 11, and complete the limiting or contact locking of the two support rods 10, so as to achieve the purpose of switching the energy consumption section between the two states mentioned above, and because 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 first rotating plate 4 and the second rotating plate 5 can support the two flat plates of the L-shaped connecting member 3 together with the energy consumption component, thereby further improving the structural stability of the energy consumption component in state one.

[0050] It is worth mentioning that, since the axial torque applied to the tension spring 7 is zero when the first rotating plate 4 and the second rotating plate 5 are in the same 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 in order to break through the rotation restriction of the tension spring 7 on the first rotating plate 4 and the second rotating plate 5, thereby avoiding accidental contact when the L-shaped connecting member 3 is subjected to instantaneous stress exceeding a preset range, causing the first rotating plate 4 and the second rotating plate 5 to immediately start to rotate relative to each other.

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

[0052] According to the above embodiment, a specific embodiment of a driving part is provided. When the energy-consuming component is in state one, the elastic telescopic rod 16 is inserted into the slider 15 to limit the slider 15. When the beam 2 is subjected to a wave impact exceeding a high intensity, the internal stress increases and begins to vibrate slightly. When the stress on the beam 2 exceeds a preset range (that is, the vibration amplitude exceeds the compression limit of the elastic telescopic rod 16), the elastic telescopic rod 16 disengages from the slider 15 and releases the limit on the slider 15. When the tension spring 7 also begins to shrink due to radial stress, it pulls the slider 15 to slide in the slide groove 17, driving 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 stress is consumed by the elastic support. When the external vibration detection mechanism detects that the vibration amplitude of the beam 2 is reduced to the preset range, the electromagnet 18 is energized to repel the slider 15 back to its original position, and the slider 15 is locked by the elastic telescopic rod 16, so that the energy-consuming component can be switched to state one.

[0053] In this way, by switching the energy-consuming component to state two, although a certain stability of the connector is sacrificed, a large amount of impact stress is consumed through flexible support, avoiding the connector from yielding, resulting in reduced connection strength or disconnection, allowing the connector to be reused many times, thereby increasing the service life of the connector.

[0054] Furthermore, the liquid exchange part includes a piston chamber 8 rotatably installed in the 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 groove 6 of the second rotating plate 5, and the side wall of the piston chamber 8 close to the piston rod 9 is connected to 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 the same straight line, 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, thereby completing the limiting of the two support rods 10. When the first rotating plate 4 and the second rotating plate 5 rotate relative to each other, the piston rod 9 slides in the piston chamber 8, and the space on one side of the piston chamber 8 increases and is sucked into the piston chamber 8 through the elastic hose 13, thereby releasing the limiting of the two support rods 10 and completing the switching of the energy-consuming component between the two states.

[0056] Embodiment 2:

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

[0058] According to the above embodiment, a specific embodiment of a second fluid exchange portion is provided. When the first rotating plate 4 and the second rotating plate 5 are in the same straight line, the fan-shaped airbag 21 is squeezed and is in a contracted state. The filling liquid in the fan-shaped airbag 21 is squeezed into the sleeve 11 through the elastic hose 13, thereby completing 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 fan-shaped airbag 21 begins to unfold. At this time, the internal pressure of the fan-shaped airbag 21 is reduced and is sucked into the fan-shaped airbag 21 through the elastic hose 13, thereby 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 the first embodiment, the structural stability of the first embodiment is reduced, but the rate at which the filling liquid enters or is sucked out of the sleeve 11 is increased, so that the switching rate of the energy-consuming component is increased, that is, the sensitivity of the energy-consuming component to stress is increased, thereby preventing the energy-consuming component from being subjected to excessive instantaneous stress and failing to complete the switching in time.

[0060] Furthermore, 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, in order to prevent the L-shaped connector 3 from yielding and deforming due to the stress transmitted by the cross beam 2, so that the energy-absorbing component cannot be reset normally, a plurality of anti-buckling ribs 14 are provided at the connection between the two flat plates of the L-shaped connector 3 to prevent the L-shaped connector 3 from bending at the connection between the two flat plates.

[0062] Furthermore, the energy dissipation component comprises an energy dissipation steel section 19 fixedly mounted between two flat plate outer walls of the L-shaped connecting member 3 , and a plurality of groups of reinforcing ribs 20 are arranged on the outer wall of the energy dissipation steel section 19 .

[0063] According to the above embodiment, a specific embodiment of a second energy-absorbing component is provided. When the stress applied to the beam 2 exceeds the bearing limit of the reinforcement rib 20, the reinforcement rib 20 will break and switch to state two. The energy-absorbing steel section 19 that loses the support of the reinforcement rib 20 can consume the stress on the L-shaped connector 3 through its own yielding.

[0064] Compared with the first embodiment, this embodiment is a one-time solution. Although it sacrifices the reusability of the energy-consuming components, the energy-consuming steel segment 19 has a stress consumption capacity far exceeding that of the compression spring 12, thereby improving the stress consumption limit of the device. It can be selected as appropriate in actual use.

[0065] Furthermore, 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, it is necessary to select a liquid that is not easily compressed. In order 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 preferred.

[0067] Furthermore, 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 by the first rotating plate 4 and the second rotating plate 5 together with the energy-absorbing component, thereby further improving the structural stability of the energy-absorbing component in state one.

[0069] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense without any doubt. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A connecting member for reinforcing a steel structure on an offshore platform, comprising a vertically arranged steel column (1) and a horizontally arranged crossbeam (2), wherein the steel column (1) and the crossbeam (2) are connected via an L-shaped connecting piece (3), characterized in that: The L-shaped connecting piece (3) is provided with an energy-consuming component, and the energy-consuming component has two states: State 1: the energy dissipation component can rigidly support the two plates of the L-shaped connecting member (3); State 2: the energy dissipation component can flexibly support the two plates of the L-shaped connecting member (3); It also includes a switching component, which is used to drive the energy-consuming component to switch between two states.

2. The connecting member for reinforcing the steel structure on an offshore platform according to claim 1, characterized in that: The energy dissipation component comprises two support rods (10) which are rotatably mounted on the outer walls of two flat plates of the L-shaped connecting member (3), a sleeve (11) is arranged between the two support rods (10) by sliding, a compression spring (12) is arranged between the two support rods (10) in the sleeve (11), and a filling liquid is also arranged in the sleeve (11), and the switching component can suck out or squeeze the filling liquid into the sleeve (11).

3. The connecting member for reinforcing the steel structure on an offshore platform according to claim 2, characterized in that: The switching assembly comprises a first rotating plate (4) rotatably mounted on the outer wall of one of the flat plates of the L-shaped connecting member (3); a slide groove (17) is provided on the top surface of the other flat plate of the L-shaped connecting member (3); a slider (15) is slidably mounted in the slide groove (17); a second rotating plate (5) is rotatably mounted 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 ends of the first rotating plate (4) and the second rotating plate (5) that are away from each other; a through groove (6) is provided on the surface of the first rotating plate (4) and the second rotating plate (5); a liquid exchange portion connected to the sleeve (11) is provided in the through groove (6); the liquid exchange portion is used to suck out or squeeze the filling liquid into the sleeve (11); It also includes a driving part for driving the slider (15) to move.

4. The connecting member for reinforcing the steel structure on an offshore platform according to claim 3, characterized in that: The driving part comprises an electromagnet (18) fixedly mounted on the side wall of the slide groove (17), and the electromagnet (18) is electrically connected to an external vibration detection mechanism, one end of the electromagnet (18) close to the slider (15) is provided with a magnetic block capable of repelling the electromagnet (18), a through hole provided in the L-shaped connecting piece (3) is provided with an elastic telescopic rod (16), and the elastic telescopic rod (16) is fixed to the cross beam (2), and a slot capable of inserting the elastic telescopic rod (16) is provided on the bottom surface of the slider (15).

5. The connecting member for reinforcing the steel structure on an offshore platform according to claim 3, characterized in that: The liquid exchange part comprises a piston chamber (8) rotatably mounted in a through groove (6) of a first rotating plate (4), a piston rod (9) being slidably mounted in the piston chamber (8), one end of the piston rod (9) being rotatably mounted in the through groove (6) of a second rotating plate (5), and a side wall of the piston chamber (8) close to the piston rod (9) and a sleeve (11) being connected to each other via an elastic hose (13).

6. The connecting member for reinforcing the steel structure on an offshore platform according to claim 3, characterized in that: The liquid exchange portion comprises a fan-shaped air bag (21) located in the through groove (6) and having two ends fixedly mounted on the inner side wall of the first rotating plate (4) and the inner side wall of the second rotating plate (5), respectively; the fan-shaped air bag (21) is connected to the sleeve (11) through an elastic hose (13).

7. The connecting member for reinforcing the steel structure on an offshore platform according to claim 1, characterized in that: A plurality of anti-buckling ribs (14) are provided at the connection between the two flat plates of the L-shaped connecting piece (3).

8. The connecting member for reinforcing the steel structure on an offshore platform according to claim 2, characterized in that: The energy dissipation component comprises an energy dissipation steel section (19) fixedly mounted between two flat plate outer walls of an L-shaped connecting member (3), and the outer wall of the energy dissipation steel section (19) is provided with a plurality of groups of reinforcing ribs (20).

9. The connecting member for reinforcing the steel structure on an offshore platform according to claim 2, characterized in that: The filling liquid in the sleeve (11) is selected from mineral oil or emulsion.

10. The connecting member for reinforcing the steel structure on an offshore platform according to claim 3, 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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