Anti-typhoon self-locking buffer device for offshore platform suspension bridge

Abstract

The utility model discloses an offshore platform suspension bridge anti-typhoon self-locking buffer device which comprises a U-shaped fixing frame, and a self-locking lock cylinder is arranged at an opening of the fixing frame. A center damping device and a limiting switch are arranged on the bottom wall of the fixing frame, and transverse damping devices are arranged on the two side walls of the fixing frame. Compared with an existing simple fixing mode of the offshore platform to the suspension bridge, the suspension bridge fixing device has the advantages that convenience in operation of the suspension bridge and wind damage resistance of the suspension bridge can be greatly improved, daily locking and fixing of the suspension bridge, quick release in an emergency state and suspension bridge fixing and shock prevention in a typhoon period can be achieved, structural damage to the suspension bridge caused by stormy waves in the typhoon period is reduced, and the service life of the suspension bridge is prolonged. And the integrity of the suspension bridge is ensured to a certain extent.

Description

A typhoon-resistant self-locking buffer device for offshore platform suspension bridges Technical Field

[0001] This utility model relates to the field of offshore platform operations, and in particular to a typhoon-resistant self-locking buffer device for offshore platform suspension bridges. Background Technology

[0002] Offshore platform drawbridges are primarily used for the transfer of personnel and supplies between the platform and ships in emergency situations. In an emergency, an electric winch located inside the platform lowers the drawbridge horizontally via steel cables, allowing personnel to escape to a multi-purpose tugboat. Currently, traditional drawbridge suspension and securing methods have significant limitations, mainly in the following aspects:

[0003] 1) The traditional suspension method of the suspension bridge is to use the lugs on it to engage with the fixed anchor points on the platform structure, and then fix it with high-strength bolts. This method requires personnel to lean out of the ship to operate when installing the fixing bolts, which poses a safety risk of personnel falling into the sea.

[0004] 2) Under normal circumstances, the suspension bridge relies on steel wire ropes for suspension. The wire rope winch lacks a mechanical locking device; its stationary state is maintained by the friction of the brake discs, preventing rolling and ensuring the bridge's secure suspension. If the brake discs fail, the suspension bridge will fall directly into the sea.

[0005] 3) Before a typhoon arrives, the drawbridge needs to be secured to fixed anchor points inside the deck. However, this method of securing the drawbridge has significant drawbacks. Under the influence of a typhoon, the drawbridge will not have sufficient buffering mechanisms to offset the torsional force exerted on it. Once this force is large enough (strong or super typhoon), it will cause irreversible damage to the drawbridge.

[0006] 4) The electric winch has no limit device when lifting the bridge, which means it cannot automatically cut off the power when the bridge is lifted into position. It can only rely on the operator's experience to operate, which poses a risk of over-lifting and damaging the equipment. Summary of the Invention

[0007] In order to solve the above-mentioned technical problems, this utility model provides a typhoon-resistant self-locking buffer device for offshore platform suspension bridges.

[0008] This utility model is achieved by adopting the following technical solution.

[0009] A typhoon-resistant self-locking buffer device for a stilt bridge on an offshore platform includes a U-shaped fixed frame with a self-locking lock core at the opening of the fixed frame; a central shock absorber and a limit switch are provided on the bottom wall of the fixed frame; and lateral shock absorbers are provided on both side walls of the fixed frame.

[0010] Furthermore, the self-locking lock cylinder includes a self-locking spring box, and a lock tongue return spring is provided inside the self-locking spring box. The end of the lock tongue return spring away from the bottom wall of the self-locking spring box abuts against the rear end of the lock tongue, and the front end of the lock tongue is placed outside the self-locking spring box.

[0011] Furthermore, the front end of the latch is formed with a bevel.

[0012] Furthermore, the central damping device and the lateral damping device have the same structure.

[0013] Furthermore, the central shock absorption device includes a shock absorption cylinder fixed on a fixed frame, a shock absorption spring inside the shock absorption cylinder, and the shock absorption spring is sleeved on a connecting column on one side of the shock absorption baffle.

[0014] This application has the following beneficial effects.

[0015] This invention can safely and reliably suspend and lock the suspension bridge, while also possessing a certain degree of external force buffering capacity. It can reduce the risk of damage to the suspension bridge from external forces (such as typhoons) to a certain extent, and significantly improve the integrity of the suspension bridge equipment. The entire invention is composed of a steel structure, facilitating maintenance and installation on offshore oil platforms. Furthermore, steel structures offer advantages such as high strength, low cost, and low processing costs. Attached Figure Description

[0016] Figure 1 is a structural schematic diagram of this utility model;

[0017] Figure 2 is a front view of this utility model.

[0018] Figure 3 is a structural schematic diagram of the central shock absorption device of this utility model;

[0019] Figure 4 is a structural schematic diagram of the self-locking lock cylinder of this utility model;

[0020] Figure 5 is a diagram showing the usage state of this utility model.

[0021] Among them, 1. lateral shock absorption device, 2. central shock absorption device, 21. shock absorption cylinder, 22. shock absorption spring, 23. shock absorption baffle, 3. self-locking lock cylinder, 31. lock tongue, 32. lock tongue return spring, 33. self-locking spring box, 4. limit switch, 5. fixed frame, 6. suspension bridge, 61. fixed lifting lug. Detailed Implementation

[0022] As shown in Figures 1-5, a typhoon-resistant self-locking buffer device for a offshore platform suspension bridge includes a U-shaped fixed frame 5. A self-locking lock core 3 is provided at the opening of the fixed frame 5. The self-locking lock core 3 includes a self-locking spring box 33, and a latch return spring 32 is provided inside the self-locking spring box 33. The end of the latch return spring 32 away from the bottom wall of the self-locking spring box 33 abuts against the rear end of the latch 31. The front end of the latch 31 forms an inclined surface and is placed outside the self-locking spring box 33. A central shock absorber 2 and a limit switch 4 are provided on the bottom wall of the fixed frame 5. A transverse shock absorber 1 is provided on both side walls of the fixed frame 5. The central shock absorber 2 and the transverse shock absorber 1 have the same structure. Taking the central shock absorber 2 as an example, the central shock absorber 2 includes a shock absorber cylinder 21 fixed on the fixed frame 5. A shock absorber spring 22 is provided inside the shock absorber cylinder 21. The shock absorber spring 22 is sleeved on a connecting post on one side of the shock absorber baffle 23.

[0023] When the suspension bridge 6 is lifted to the position of the present invention using a steel wire rope, the fixed lifting lug 61 of the suspension bridge 6 pushes past the locking tongue 31 of the self-locking lock cylinder 3. The locking tongue 31 is pushed out by the locking tongue return spring 32 after the locking tongue 31 passes through the fixed lifting lug 61, locking the suspension bridge 6 and thus fixing it to the present invention. When the suspension bridge 6 needs to be lowered, the inclined side of the locking tongue 31 is rotated 180° to the opposite direction of the movement of the suspension bridge 6. The fixed lifting lug 61 presses against the inclined side of the locking tongue 31, generating an axial lateral force on the locking tongue 31, so that the fixed lifting lug 61 can push open the locking tongue 31, and the suspension bridge 6 can be unlocked and lowered. After the suspension bridge 6 is raised to the position of this utility model device, the suspension bridge 6 will continue to rise. During this process, the fixed lifting lug 61 will press down on the central shock absorption device 2. After the central shock absorption device 2 continues to press down, it will trigger the limit switch 4 located on one side of the central shock absorption device 2. The limit switch 4 is connected to the lifting motor of the suspension bridge 6. After it is activated, it will cut off the power to the motor, ensuring that the suspension bridge 6 cannot continue to rise, thus achieving the limit operation. After the suspension bridge 6 is raised to the locking position, the left and right sides of the device are lateral shock absorption devices 1. During typhoon weather, the wind and waves will cause the suspension bridge to sway laterally. This lateral sway will also cause the fixed lifting lug 61 to sway. In this way, the lateral shock absorption devices 1 can play a role in absorbing the shock of the suspension bridge 6.

[0024] The method of using this utility model is as follows:

[0025] The entire self-locking buffer device of this application is welded to the I-beam at the original locking lug position of the suspension bridge. The implementation process includes two steps. First, the suspension bridge 6 is lifted and locked. In this process, the suspension bridge 6 is lifted by an electric winch driving a steel wire rope. The suspension bridge 6 is lifted until the fixed lug 61 contacts the inclined surface of the latch 31 of the self-locking lock cylinder 3. Then, it continues to lift. The inclined surface of the fixed lug 61 and the latch 31 contacts each other. The force acting on the latch 31 will have a component force along the axial direction of the latch 31. This component force will compress the latch return spring 32, and the latch 31 will retract. The suspension bridge 6 continues to lift until the latch 31 passes through the hollow ring of the fixed lug 61. The diameter of this hollow ring is larger than the diameter of the latch 31. Therefore, the suspension bridge 6 will continue to lift until the outer edge of the fixed lug 61 contacts and presses down on the central shock absorber 2. At this time, the predetermined locking position has been reached, and the lifting can be stopped. If the lifting continues, the central shock absorber 2 will press down to the limit switch 4. The limit switch 4 will activate, and the electric winch will be de-energized to stop the lifting. This is the locked limit position. Next is the lowering process of the suspension bridge 6. First, rotate the locking tongue 31 180° axially so that the force-bearing inclined surface of the locking tongue 31 faces inward. Operate the electric winch to lower the suspension bridge (if the lifting was at the limit position, the limit switch 4 needs to be bypassed before operating the electric winch). Similarly, the locking tongue 31 will be pressed to the retracted position, disengaging the fixed lifting lug 61 from the locking tongue area. Continuing to lower will complete the lowering stroke.

[0026] After the lifting and locking stroke is completed, the fixed lifting lug 61 of the suspension bridge 6 will be positioned between the three shock-absorbing devices. When the suspension bridge 6 is subjected to external forces (torsional forces), it can buffer and absorb shocks, reducing the probability of structural damage to the suspension bridge. At the same time, the entire implementation process is simple to operate, has no additional safety risks, requires no personnel to contact the suspension bridge and locking devices, and can also limit the electric winch of the suspension bridge, making the operation safe and reliable.

[0027] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A typhoon-resistant self-locking buffer device for offshore platform suspension bridges, characterized in that: It includes a U-shaped fixed frame (5), a self-locking lock cylinder (3) at the opening of the fixed frame (5); a central shock absorber (2) and a limit switch (4) are provided on the bottom wall of the fixed frame (5), and a transverse shock absorber (1) is provided on both side walls of the fixed frame (5).

2. The typhoon-resistant self-locking buffer device for offshore platform suspension bridges according to claim 1, characterized in that: The self-locking lock cylinder (3) includes a self-locking spring box (33), and a lock tongue return spring (32) is provided inside the self-locking spring box (33). The end of the lock tongue return spring (32) away from the bottom wall of the self-locking spring box (33) abuts against the rear end of the lock tongue (31), and the front end of the lock tongue (31) is placed outside the self-locking spring box (33).

3. The offshore platform catwalk typhoon self-locking buffer device according to claim 2, characterized in that: The front end of the latch (31) forms a bevel.

4. The typhoon-resistant self-locking buffer device for offshore platform suspension bridges according to claim 1, characterized in that: The central damping device (2) and the transverse damping device (1) have the same structure.

5. The self-locking buffer device for preventing typhoon of a bridge of an offshore platform according to claim 4, characterized in that: The central shock absorption device (2) includes a shock absorption cylinder (21) fixed on a fixed frame (5), and a shock absorption spring (22) is provided inside the shock absorption cylinder (21). The shock absorption spring (22) is sleeved on a connecting column on one side of the shock absorption baffle (23).

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