A marine floating platform and a damping locking device thereof

Abstract

The application discloses a damping and locking device for a marine floating platform, which comprises an upper fixed table, a lower fixed table, an air bag arranged between the upper fixed table and the lower fixed table, and a damping mechanism arranged in the air bag. The damping mechanism comprises a closed oil cylinder with a cylinder body and a piston, wherein the piston is provided with a damping hole, one end of the cylinder body is fixedly connected with the upper fixed table, one end of the piston is fixedly connected with the lower fixed table, and the damping mechanism further comprises a damping adjusting plate matched with the damping hole on the piston. The damping and locking device for the marine floating platform can realize efficient high-frequency vibration isolation, precise buffer adjustment and reliable locking and fixing functions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of offshore floating platforms, and in particular to an offshore floating platform and a damping locking device thereof. BACKGROUND

[0002] In the fields of ships, ocean engineering, etc., super-large offshore floating platforms often adopt locking structures. However, the damping design of offshore floating platforms is the weakest and most critical technical problem of the locking structure. For offshore floating platforms, local stress concentration is easily generated under sea conditions, which makes the structure difficult to withstand. At the same time, traditional rigid or semi-rigid connection structures such as hinges are difficult to achieve multi-directional flexible connection. The traditional vibration isolation devices have many limitations when dealing with complex sea conditions and equipment operating conditions. For example, some vibration isolation devices have poor absorption and isolation effect on high-frequency vibration, which leads to the easy transmission of high-frequency vibration to the surrounding structure, affecting the normal operation of the offshore floating platform and the stability of the overall system. Some air bag type damping devices can buffer to a certain extent, but lack effective solutions for locking and fixing. When subjected to a large external force of the equipment and sea wave impact, the air bag is easily compressed too much or cannot respond in time, and cannot provide effective buffer protection in time, and it is difficult to achieve stable locking when the offshore floating platform needs to be fixed and installed, which poses a safety hazard. The traditional locking device is generally complex to operate and is difficult to adapt to complex offshore environments, and it is difficult to provide effective damping and buffering functions. Therefore, it has become the focus of the marine equipment manufacturing industry to develop a more safe and reliable, simple-to-operate offshore floating platform damping locking device. SUMMARY

[0003] In view of the above defects or improvement needs of the prior art, the present application provides an offshore floating platform and a damping locking device thereof, which can realize efficient high-frequency vibration isolation, precise buffer adjustment and reliable locking and fixing functions.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions.

[0005] In some embodiments, an offshore floating platform damping locking device is provided, which comprises:

[0006] an upper fixed table;

[0007] a lower fixed table;

[0008] an air bag arranged between the upper fixed table and the lower fixed table;

[0009] a damping mechanism arranged in the air bag;

[0010] The damping mechanism comprises a closed oil cylinder having a cylinder body and a piston with a damping hole, one end of the cylinder body being fixedly connected with the upper fixed table, and one end of the piston being fixedly connected with the lower fixed table,

[0011] The damping mechanism further comprises a damping adjustment plate matched with the damping hole on the piston.

[0012] In some embodiments, the offshore floating platform damping locking device comprises a guide mechanism located in the air bag.

[0013] The guide mechanism comprises a plurality of groups of guide rods distributed around the periphery of the damping mechanism, each group of guide rods comprising a first rod and a second rod with an initial angle therebetween, the first rod being connected to the upper fixed table, the second rod being connected to the lower fixed table, and the first rod and the second rod being rotatably connected.

[0014] In some embodiments, the guide mechanism comprises four groups of guide rods uniformly arranged circumferentially around the central axis of the damping mechanism, and the two opposite groups of guide rods are symmetrically arranged.

[0015] The length of each guide rod in the two opposite groups of guide rods, the distance between the two connection points on the upper fixed table, i.e. the upper connection segment, and the distance between the two connection points on the lower fixed table, i.e. the lower connection segment, are all equal, and the two first rods, the two second rods, the upper connection segment and the lower connection segment of the two opposite groups of guide rods form an equilateral hexagon.

[0016] In some embodiments, the offshore floating platform damping locking device comprises a limiting spring arranged between the cylinder body and the lower fixed table.

[0017] In some embodiments, the offshore floating platform damping locking device comprises a pressure sensor arranged between the limiting spring and the lower fixed table.

[0018] The pressure sensor is used to detect the elastic force of the limiting spring, and when the elastic force reaches a preset pressure value, the damping adjustment plate is driven to close the damping hole.

[0019] The offshore floating platform damping locking device is further configured to drive the damping adjustment plate to close the damping hole when the air bag pressure is insufficient or broken.

[0020] In some embodiments, the lower fixed table has a wire hole located below the pressure sensor.

[0021] In some embodiments, the end of the cylinder body fixedly connected with the upper fixed table has a fixed boss, and the upper fixed table comprises a fixed plate, and the fixed boss is fixedly and sealingly connected with the fixed plate.

[0022] In some embodiments, the damping mechanism further comprises a damping adjustment shaft, one end of the damping adjustment shaft is connected to the damping adjustment plate, and the other end of the damping adjustment shaft is connected to a driving mechanism, the driving mechanism comprises a rotary driving source, and the damping adjustment shaft can rotate under the driving of the rotary driving source.

[0023] In some embodiments, the piston has a piston rod, the piston rod has a shaft hole penetrating the piston rod in the center, and the damping adjustment shaft penetrates the shaft hole.

[0024] In some embodiments, the piston rod is integrally formed with the lower fixed table.

[0025] In some embodiments, the piston has a piston rod and a piston head, the piston head comprises a first piston block and a second piston block, the first piston block and the second piston block are both provided with damping holes, the first piston block and the second piston block are fixedly connected, the first piston block and the second piston block have a damping adjustment groove therebetween, and the damping adjustment plate is arranged in the damping adjustment groove.

[0026] In some embodiments, the damping holes are arc-shaped.

[0027] In some embodiments, a marine floating platform is also provided, and the marine floating platform comprises the marine floating platform damping and locking device in any of the above embodiments.

[0028] Compared with the prior art, the application has at least the following beneficial effects.

[0029] In the embodiments of the present application, a closed cavity is formed in the air bag of the marine floating platform damping and locking device, the damping mechanism is arranged in the closed cavity, the space of the cavity is fully utilized, so that the axial and radial dimensions of the air bag can be designed as large as possible, and the damping mechanism can also fully utilize the space in the air bag, thereby increasing the adjustment control range and the operation margin. In addition, in the present application, one end of the cylinder is directly fixedly connected to the upper fixed table, one end of the piston is directly fixedly connected to the lower fixed table, the cylinder is filled with hydraulic oil, and the cylinder is a non-leakage cylinder, so that the response to vibration is faster, and the influence of the pulse vibration of the marine floating platform can be avoided as much as possible.

[0030] In some embodiments, the marine floating platform is provided with a guide mechanism between the upper fixed table and the lower fixed table, so that the damage of the device caused by the shearing force can be avoided, and the influence caused by the shearing force can be offset when the marine floating platform is subjected to a transverse swing load.

[0031] In some embodiments, the limiting spring is arranged between the cylinder and the lower fixed platform, and vibration between the upper fixed platform and the lower fixed platform can be directly transmitted to the limiting spring. The air bag, the damping mechanism and the limiting spring can all directly respond to the vibration. The air bag, the damping mechanism and the limiting spring form a parallel damping structure, which can form an efficient response to high-frequency, medium-frequency and low-frequency vibration, and effectively adapt to complex working conditions of the offshore floating platform and marine environment requirements.

[0032] In some embodiments, the limiting spring can assist in vibration isolation before the cylinder reaches the limit position. When the limiting spring is compressed to the limit position, the pressure sensor feedback reaches the preset pressure value, and the pressure sensor drives the motor to completely close the damping hole of the damping adjustment plate, so that the offshore floating platform damping locking device is self-locked, preventing the air bag from being further compressed and damaged.

[0033] In some embodiments, the piston rod structure is used to cleverly connect the damping adjustment plate through the shaft hole, avoiding the opening between the air bag and the lower fixed platform, and ensuring the airtightness of the air bag.

[0034] In some embodiments, the piston rod and the lower fixed platform are integrally formed. The air bag is sealingly connected to the lower fixed platform, and the lower fixed platform has no movable opening, reducing the possibility of air leakage.

[0035] The offshore floating platform and the damping locking device thereof in the embodiments of the present application can adjust the opening degree of the damping hole by adjusting the position of the damping adjustment plate, thereby adjusting the buffer resistance. When the damping adjustment plate is rotated to abut against the limiting protrusion, the damping hole is completely covered and sealed by the damping adjustment plate, and efficient high-frequency vibration isolation, precise buffer adjustment and reliable locking and fixing functions can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The figure is a cross-sectional view of the offshore floating platform damping locking device in some embodiments of the present application.

[0037] Figure 2 The figure is a partial structure diagram of the offshore floating platform damping locking device in some embodiments of the present application.

[0038] Figure 3 The figure is a partial structure diagram of the offshore floating platform damping locking device in some embodiments of the present application.

[0039] Figure 4 The figure is a partial structure diagram of the offshore floating platform damping locking device in some embodiments of the present application.

[0040] Figure 5Part structure schematic diagram of offshore floating platform damping locking device in some embodiments of the application.

[0041] Figure 6 Structure schematic diagram of the first piston block of the offshore floating platform damping locking device in some embodiments of the application.

[0042] Legend: upper fixed table 100, lower fixed table 200, air bag 300, damping mechanism 400, guide mechanism 500, limit spring 600, pressure sensor 700, wire hole 800;

[0043] Fixed plate 101;

[0044] Cylinder body 401, piston 402, damping hole 403, damping adjustment plate 404, damping adjustment shaft 405, connecting plate 406, limit protrusion 407, damping adjustment groove 408, non-hole section 409;

[0045] Fixed boss 4011, sealing element 4012;

[0046] Piston rod 4021, shaft hole 4022, piston head 4023, first piston block 4024, second piston block 4025, sealing support pad 4026, screw rod 4027, connecting hole 4028;

[0047] First rod 501, second rod 502. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the present application more clear and understandable, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0049] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0050] Figure 1 Sectional view schematic diagram of the offshore floating platform damping locking device in some embodiments of the application. Figure 2Figure 1 is a schematic diagram of part of a vibration damping and locking device for a floating offshore platform according to some embodiments of the present application. The present application provides a floating offshore platform comprising a vibration damping and locking device for the floating offshore platform, which can achieve efficient high-frequency vibration isolation, precise buffer adjustment, and reliable locking and fixing functions.

[0051] Reference Figure 1 and Figure 2 In some embodiments of the present application, a vibration damping and locking device for a floating offshore platform is provided, which comprises an upper fixed platform 100, a lower fixed platform 200, an air bag 300, and a damping mechanism 400. The air bag 300 is arranged between the upper fixed platform 100 and the lower fixed platform 200. The damping mechanism 400 is arranged in the air bag 300. The damping mechanism 400 comprises a closed oil cylinder having a cylinder body 401 and a piston 402, the piston 402 having a damping hole 403, one end of the cylinder body being fixedly connected to the upper fixed platform, one end of the piston being fixedly connected to the lower fixed platform, and the other end of the piston being in the cylinder body. The damping mechanism 400 further comprises a damping adjustment plate 404 cooperating with the damping hole on the piston.

[0052] In embodiments of the present application, the upper fixed platform 100 and the lower fixed platform 200 can be respectively connected to two floating components of the floating offshore platform, which not only can buffer the impact force of wind and waves to improve the stability of the floating platform, but also can achieve precise buffer adjustment and reliable locking and fixing functions. In embodiments of the present application, a closed cavity is formed in the air bag 300 of the vibration damping and locking device for the floating offshore platform, and the damping mechanism 400 is arranged in the closed cavity. The space of the cavity is fully utilized, so that the axial and radial dimensions of the air bag 300 can be designed as large as possible, and the damping mechanism 400 can also fully utilize the space in the air bag to increase the adjustment control range and the operable margin. In addition, one end of the cylinder body is directly fixedly connected to the upper fixed platform, one end of the piston is directly fixedly connected to the lower fixed platform, the cylinder body is filled with hydraulic oil, and the cylinder body is a non-leakage oil cylinder, so that the response to vibration is faster and the influence of pulse vibration can be avoided as much as possible.

[0053] In some embodiments, the vibration damping and locking device for the floating offshore platform comprises a guide mechanism 500 arranged in the air bag 300. In embodiments of the present application, the guide mechanism 500 can provide stable support for the entire vibration damping and locking device for the floating offshore platform. The guide mechanism 500 is arranged in the air bag 300 and does not occupy other space, so that the space utilization is more reasonable. In embodiments of the present application, by arranging a special guide mechanism 500, the damping mechanism does not need to bear excessive shear force. The arrangement of the guide mechanism can avoid excessive eccentric load on the damping mechanism, which can cause wear or hydraulic oil leakage and affect reliability.

[0054] In some embodiments, the guiding mechanism 500 comprises a plurality of groups of guiding rods distributed around the outer periphery of the damping mechanism 400, each group of guiding rods comprising a first rod 501 and a second rod 502, the first rod and the second rod having an initial angle therebetween, the first rod 501 being connected to the upper fixed platform 100, the second rod 502 being connected to the lower fixed platform 200, the first rod 501 and the second rod 502 being rotatably connected. In embodiments of the present application, the first rod 501 and the second rod 502 constitute a group of guiding rods. The plurality of groups of guiding rods are arranged around the damping mechanism 400. The plurality of groups of guiding rods can form support between the upper fixed platform 100 and the lower fixed platform 200 while avoiding the adverse effects of shear force. In some embodiments, the initial angle between the first rod and the second rod is 110-140 degrees. In embodiments of the present application, the initial angle between the first rod and the second rod is set to 110-140 degrees, which can make full use of the space between the damping mechanism 400 and the air bag 300, prevent self-locking on the basis of effective support and guidance, and prevent the air bag 300 from being scratched and damaged during movement due to an excessively large angle.

[0055] In embodiments of the present application, the upper fixed platform 100 and the lower fixed platform 200 of the offshore floating platform damping locking device can move up and down relative to each other within a small range, and a guiding mechanism is arranged between the upper fixed platform 100 and the lower fixed platform 200, which can avoid damage to the device by shear force and offset the effects of shear force.

[0056] In some embodiments, the guiding mechanism 500 comprises 4 groups of guiding rods, and the first rod and the second rod of each group of guiding rods are equal in length, i.e., the 8 guiding rods of the guiding mechanism are equal in length. In some embodiments, the 4 groups of guiding rods are uniformly arranged circumferentially around the central axis of the damping mechanism, and the two opposite groups of guiding rods are symmetrically arranged. The length of each guiding rod in the two opposite groups of guiding rods is equal to the distance between the two connection points on the upper fixed platform 100, i.e., the distance of the upper connection section, and the distance between the two connection points on the lower fixed platform 200, i.e., the distance of the lower connection section. The two first rods, the two second rods, the upper connection section, and the lower connection section of the two opposite groups of guiding rods form an equilateral hexagon, and the initial angle between the first rod and the second rod is set to 120 degrees, which makes the structure more stable. The 4 groups of guiding rods, together with the upper fixed platform 100 and the lower fixed platform 200, form two equilateral hexagonal structures, which can withstand loads and shear forces in various directions and ensure the stability of the guidance.

[0057] In some embodiments, the offshore floating platform damping locking device comprises a limiting spring 600 and a pressure sensor 700, and the limiting spring 600 is arranged between the cylinder body 401 and the lower fixed platform 200. In the embodiments of the present application, the vibration between the upper fixed platform 100 and the lower fixed platform 200 can be directly transmitted to the limiting spring 600, and the air bag 300, the damping mechanism 400 and the limiting spring 600 can all directly respond to the vibration, and the air bag 300, the damping mechanism 400 and the limiting spring 600 form a parallel damping structure, which can form an efficient response to high-frequency, medium-frequency and low-frequency vibrations.

[0058] In some embodiments, the offshore floating platform damping locking device comprises a pressure sensor 700, and the pressure sensor 700 is arranged between the limiting spring 600 and the lower fixed platform 200. In the embodiments of the present application, the pressure sensor 700 is arranged between the limiting spring 600 and the lower fixed platform 200, and the pressure sensor is used to detect the elastic force of the limiting spring. When the elastic force reaches a preset pressure value, the damping adjusting plate is driven to close the damping hole. In the embodiments of the present application, before the cylinder body 401 reaches the limit position, the limiting spring can play an auxiliary vibration isolation effect. When the limiting spring is compressed to the limit position, the elastic force fed back by the pressure sensor 700 reaches the preset pressure value, and the pressure sensor drives the motor to make the damping adjusting plate 404 completely close the damping hole 403, so that the offshore floating platform damping locking device is self-locked, and further compression of the air bag to cause rupture and damage is prevented.

[0059] In some embodiments, the offshore floating platform damping locking device is further configured to drive the damping adjusting plate to close the damping hole when the air bag pressure is insufficient or ruptured. When the air bag pressure is insufficient or ruptured, the offshore floating platform damping locking device is self-locked to avoid rigid damage of the offshore floating platform damping locking device and play a protection role. In the embodiments of the present application, when the air bag pressure is insufficient or ruptured, the upper fixed platform 100 and the lower fixed platform 200 are easily compressed, and the limiting spring can play a primary vibration isolation role. When the limiting spring is further compressed to the limit position, the elastic force fed back by the pressure sensor 700 reaches the preset pressure value, and the pressure sensor drives the motor to make the damping adjusting plate 404 completely close the damping hole 403, so that the offshore floating platform damping locking device is self-locked to avoid rigid damage of the offshore floating platform damping locking device and play a protection role.

[0060] In some embodiments, the lower fixed platform has a wire hole 800. In some embodiments of the present application, a wire can pass through the wire hole 800 to connect the pressure sensor 700. In some embodiments, the wire hole 800 is arranged below the pressure sensor 700, and a seal is formed between the pressure sensor 700 and the wire hole 800 to prevent air leakage.

[0061] In some embodiments, the cylinder 401 is fixedly connected to the upper fixed platform 100 at one end, and has a fixed boss 4011. The upper fixed platform includes a fixed plate 101, and the fixed boss 4011 is fixedly and sealingly connected to the fixed plate 101. In some embodiments, a sealing member 4012 is arranged between the fixed boss 4011 and the fixed plate 101, so as to completely seal the cylinder 401 and form an oil cylinder without internal leakage. In the embodiments of the application, the first rod 501 is directly connected to the fixed boss 4011, the fixed boss 4011 is connected to the fixed plate 101, and the second rod 502 is connected to the lower fixed platform 200. In some embodiments, the first rod 501 and the fixed boss 4011 are connected through a first rotary hinge 503, the second rod 502 and the lower fixed platform 200 are connected through a second rotary hinge 504, and the first rod 501 and the second rod 502 are connected through a third rotary hinge 505. In the embodiments of the application, the guide mechanism has simple structure, good reliability, flexible guidance, and feedback response, and can well assist in vibration reduction.

[0062] In the embodiments of the application, the fixed boss 4011 is directly formed on the cylinder 401 and fixedly connected to the fixed plate 101, so that the intermediate connecting member is reduced, assembly is facilitated, and vibration reduction effect is better.

[0063] In some embodiments, the damping mechanism 400 further includes a damping adjustment shaft 405, one end of the damping adjustment shaft 405 is connected to the damping adjustment plate 404, and the other end of the damping adjustment shaft 405 is connected to a driving mechanism (not shown). The driving mechanism includes a rotary driving source, and the damping adjustment shaft can rotate under the driving of the rotary driving source. In some embodiments, the rotary driving source is a motor. In the embodiments of the application, the damping adjustment plate 404 is driven in rotation, so that the influence of the pressure of hydraulic oil can be reduced, and driving is more rapid and accurate.

[0064] In some embodiments, the piston 402 has a piston rod 4021, the piston rod 4021 has a shaft hole 4022 penetrating the piston rod 4021 in the center, and the damping adjustment shaft 405 penetrates the shaft hole 4022. In the embodiments of the application, the original structure of the piston rod 4021 is utilized, and a hole is formed in the center, the damping adjustment shaft 405 penetrates the shaft hole 4022 to connect the damping adjustment plate 404, the structure of the piston rod is ingeniously utilized, and the hole between the air bag and the lower fixed platform is avoided, so as to ensure the airtightness of the air bag.

[0065] In some embodiments, the piston 402 has a piston head 4023 at one end and a lower fixed platform at the other end. The piston rod 4021 connects the piston head 4023 and the lower fixed platform 200 directly. The piston head 4023 is arranged in the cylinder 401. The damping hole 403 is arranged on the piston head 4023. In some embodiments, the piston rod 4021 is integrally formed with the lower fixed platform 200. In some embodiments, the piston rod 4021, the piston head 4023, and the lower fixed platform 200 are integrally formed. The air bag is sealingly connected to the lower fixed platform 200, which avoids having a movable opening on the lower fixed platform and reduces the possibility of air leakage.

[0066] Figure 3 A partial structure diagram of a damping and locking device for a floating offshore platform in some embodiments of the present application is shown in FIG. 4. Reference signs in FIG. 4 that are the same as those in FIG. 1 denote the same or similar parts. Figure 3 In some embodiments, the damping hole 403 has a circular cross-section, and the damping adjustment plate 404 has a shape matching that of the damping hole 403. The damping adjustment plate 404 and the damping adjustment shaft 405 have a connecting plate 406 therebetween. In some embodiments, the damping hole 403 has a plurality of holes. The plurality of damping holes 403 are evenly distributed around the axis of the piston head 4023. Correspondingly, the damping adjustment plate 404 has a plurality of holes corresponding to the damping holes 403 one-to-one. In some embodiments, the piston head 4023 further has a limiting protrusion 407 beside each damping hole 403, which is used to position the rotational position of the damping adjustment plate 404. When the damping adjustment plate 404 is rotated to abut against the limiting protrusion 407, the damping hole 403 is completely covered and sealed by the damping adjustment plate 404. In embodiments of the present application, the opening degree of the damping hole 403 can be adjusted by adjusting the position of the damping adjustment plate 404, so as to adjust the buffering resistance. The limiting protrusion 407 is used to limit the extreme position of the damping adjustment plate 404, so as to ensure the accuracy of the adjustment.

[0067] In some embodiments, one limiting protrusion 407 can be arranged on each side of each damping hole 403, one side being used to define the extreme position of complete sealing and the other side being used to define the extreme position of complete opening. It can be understood that the side or the two sides beside the damping hole 403 refer to the direction along the circumference of the piston head 4023. By limiting the maximum stroke of the damping adjustment plate 404 by the limiting protrusions 407 on both sides, the efficiency and accuracy of the control adjustment can be improved.

[0068] Figure 4 A partial structure diagram of a damping and locking device for a floating offshore platform in some embodiments of the present application is shown in FIG. 4. Reference signs in FIG. 4 that are the same as those in FIG. 1 denote the same or similar parts. Figure 4In some embodiments of the present application, the piston head comprises a first piston block 4024 and a second piston block 4025. The first piston block and the second piston block are both provided with damping holes 403. The first piston block and the second piston block are fixedly connected. In some embodiments, the first piston block and the second piston block are both provided with connecting holes 4028. The first piston block and the second piston block are fixedly connected by bolts or screws 4027 passing through the connecting holes 4028. In some embodiments, the first piston block 4024, the piston rod 4021 and the lower fixed table 200 are integrally formed. The damping holes on the first piston block and the second piston block are the same in shape and size and are arranged one-to-one in position. The first piston block and the second piston block have a damping adjustment groove 408 therebetween. The damping adjustment plate 404 is arranged in the damping adjustment groove. In some embodiments, the connecting part between the first piston block and the second piston block is provided with a sealing support pad 4026. The damping adjustment groove 408 can be formed between the first piston block and the second piston block by the sealing support pad 4026. In embodiments of the present application, the piston has a piston rod and a piston head, the piston head comprises a first piston block and a second piston block, the first piston block and the second piston block are both provided with damping holes, the first piston block and the second piston block are fixedly connected, the first piston block and the second piston block have a damping adjustment groove therebetween, and the damping adjustment plate is arranged in the damping adjustment groove. The piston rod is provided with a shaft hole 4022 in the center, and the damping adjustment shaft 405 passes through the shaft hole 4022 to be connected with the damping adjustment plate 404 through the connecting plate 406.

[0069] In some embodiments, the thickness of the sealing support pad 4026 is slightly greater than the thickness of the damping adjustment plate 404. In embodiments of the present application, the damping adjustment plate is arranged between the first piston block and the second piston block, which can reduce the influence of the pressure difference between the upper and lower cavities of the oil cylinder, reduce the axial force of the damping adjustment shaft, and ensure the reliability of the sealing between the damping adjustment plate and the damping hole.

[0070] Figure 5 Part structure schematic diagram of the offshore floating platform damping and locking device in some embodiments of the present application. Figure 6 Structure schematic diagram of the first piston block of the offshore floating platform damping and locking device in some embodiments of the present application. Reference is made to Figure 5 and Figure 6 In some embodiments, the shape of the damping hole 403 is arc-shaped, and the shape of the damping adjustment plate is the same as that of the damping hole. By arranging the arc-shaped damping hole, the size adjustment of the damping hole is more convenient and accurate.

[0071] In some embodiments, the first piston block and the second piston block each have a plurality of damping holes. The plurality of damping holes are evenly distributed around the axis of the first piston block and the second piston block. In some embodiments, the first piston block and the second piston block each have 4-6 damping holes. By providing a plurality of damping holes, the rotation angle of the damping adjustment shaft 405 is reduced each time the damping is adjusted, achieving efficient adjustment.

[0072] In some embodiments, the circumferential length of each damping adjustment plate is slightly greater than the circumferential length of each damping hole. In some embodiments, there is a non-hole section 409 between each two damping holes. The circumferential length of the damping adjustment plate is equal to the circumferential length of the non-hole section. The first piston block has a limiting protrusion 407. The limiting protrusion 407 is arranged on one side of each damping hole. In the embodiments of the present application, there is one damping hole, one non-hole section, and one corresponding damping adjustment plate between two limiting protrusions 407. When the damping adjustment plate abuts against the limiting protrusion next to the damping hole, the damping adjustment plate completely seals the damping hole. When the damping adjustment plate abuts against the limiting protrusion next to the non-hole section, the damping adjustment plate is completely misaligned with the damping hole, and the damping hole is completely open. In the embodiments of the present application, the damping adjustment plate cooperates with the damping hole and the non-hole section to adjust between completely opening and completely sealing the damping hole, efficiently and reliably achieving precise buffer adjustment and reliable locking and fixing.

[0073] In some embodiments, a marine floating platform is also provided, which includes the marine floating platform damping and locking device of any of the above embodiments.

[0074] In the embodiments of the present application, the marine floating platform damping and locking device is composed of a sealed air bag, an oil cylinder without internal leakage, a piston head with damping holes, a rotary damping adjustment plate driven by an electric motor, a guide mechanism, a limiting spring, and a pressure sensor. The sealed air bag is filled with compressed air, which can absorb and isolate high-frequency vibrations. The hydraulic oil in the oil cylinder can flow between the two cavities through the damping holes in the piston. When the air bag is squeezed, the damping holes act as a buffer. The rotary damping adjustment plate is driven by an electric motor, and the buffer resistance can be adjusted by adjusting the size of the damping holes. When the damping adjustment plate is rotated to the point where the damping holes are completely closed, the two cavities of the oil cylinder are separated and there is no internal leakage. At this time, because the hydraulic oil is sealed in the cavity, the upper and lower fixed platforms can be locked, and the air bag cannot continue to be squeezed. In the embodiments of the present application, the marine floating platform can achieve efficient high-frequency vibration isolation, precise buffer adjustment, and reliable locking and fixing.

[0075] Those skilled in the art will readily understand that the above description is only of the preferred embodiments of the present application and is not intended to limit the present application, and any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A vibration damping and locking device for a floating offshore platform, characterized in that, The vibration damping and locking device for the offshore floating platform includes: Mounting on a fixed platform; Lower fixed platform; An airbag is positioned between the upper and lower fixed platforms. A damping mechanism is provided inside the airbag. The damping mechanism includes a closed hydraulic cylinder, which has a cylinder body and a piston. The piston has a damping hole. One end of the cylinder body is fixedly connected to the upper fixed platform, and one end of the piston is fixedly connected to the lower fixed platform. The damping mechanism also includes a damping adjustment plate, which cooperates with the damping hole on the piston. A guiding mechanism is located inside the airbag. The guiding mechanism includes four sets of guide rods distributed around the outer periphery of the damping mechanism. Each set of guide rods includes a first rod and a second rod. The first rod and the second rod have an initial angle. The first rod is connected to the upper fixed platform, and the second rod is connected to the lower fixed platform. The first rod and the second rod are rotatably connected. The four sets of guide rods are evenly arranged around the central axis of the damping mechanism. The two sets of guide rods opposite each other are symmetrically arranged. The length of each guide rod in the two sets of guide rods, the distance between the two connection points on the upper fixed platform (i.e., the upper connecting segment), and the distance between the two connection points on the lower fixed platform (i.e., the lower connecting segment) are all equal. The two first rods, two second rods, the upper connecting segment, and the lower connecting segment of the two sets of guide rods opposite each other form an equilateral hexagon. A limiting spring is disposed between the cylinder body and the lower fixed platform; A pressure sensor is disposed between the limiting spring and the lower fixed platform. The pressure sensor is used to detect the elastic force of the limiting spring. When the elastic force reaches a preset pressure value, it drives the damping adjustment plate to close the damping hole. The vibration damping locking device for the offshore floating platform is also configured to: drive the damping adjustment plate to close the damping hole when the airbag pressure is insufficient or ruptures.

2. The vibration damping and locking device for offshore floating platforms according to claim 1, characterized in that, The lower fixing platform has a wire hole, which is located below the pressure sensor.

3. The vibration damping and locking device for offshore floating platforms according to claim 1, characterized in that, The cylinder body has a fixed boss at one end that is fixedly connected to the upper fixed platform. The upper fixed platform includes a fixed plate, and the fixed boss is fixedly and sealed to the fixed plate.

4. The vibration damping and locking device for offshore floating platforms according to claim 1, characterized in that, The damping mechanism further includes a damping adjustment shaft, one end of which is connected to the damping adjustment plate and the other end of which is connected to a drive mechanism. The drive mechanism includes a rotation drive source, and the damping adjustment shaft can rotate under the drive of the rotation drive source.

5. The vibration damping and locking device for offshore floating platforms according to claim 4, characterized in that, The piston has a piston rod with a through hole at the center of the piston rod. The damping adjustment shaft passes through the through hole, and the piston rod and the lower fixed platform are integrally formed.

6. The vibration damping and locking device for offshore floating platforms according to claim 4, characterized in that, The piston has a piston rod and a piston head. The piston head includes a first piston block and a second piston block. Both the first piston block and the second piston block are provided with damping holes. The first piston block and the second piston block are fixedly connected. There is a damping adjustment groove between the first piston block and the second piston block. The damping adjustment plate is disposed in the damping adjustment groove.

7. The vibration damping and locking device for offshore floating platforms according to claim 4, characterized in that, The damping orifice is arc-shaped.

8. A floating platform for offshore use, characterized in that, The offshore floating platform includes the offshore floating platform vibration damping and locking device as described in any one of claims 1-7.

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