Ship berthing anti-falling energy absorber for ocean platform

Abstract

The utility model relates to the technology of ocean oil and gas resource exploitation equipment, in particular to a ship berthing anti-falling energy absorber for an ocean platform, which comprises an inner cylinder and an outer cylinder which are coaxially arranged, the rear end of the inner cylinder is connected with the front end of the outer cylinder through an elastic energy absorbing body, the bottom end of the inner cylinder is provided with an inner cylinder blocking plate, and the bottom of the outer cylinder is connected with a mounting flange. A plurality of anti-falling zippers are fixedly connected between the mounting flange at the bottom of the inner cavity of the outer barrel and the bottom surface of the inner barrel blocking plate; the inner cylinder can be effectively prevented from falling off, the elastic energy absorption body is clamped in the device, damaged equipment can be conveniently and completely recycled and treated, and the safety risk of the damaged equipment to other devices on the seabed is reduced.

Description

Technical Field

[0001] The utility model relates to marine oil and gas resource exploitation equipment technology, in particular to a ship berthing anti-falling energy absorber for an offshore platform. Background Art

[0002] Offshore platforms are crucial equipment for the development of marine oil and gas resources. Equipped with equipment for drilling, oil and gas extraction, storage, power, communications, and navigation, they are indispensable for offshore oil and gas development. The equipment used on offshore platforms, as well as the extracted oil and gas resources, must be transported by ships. During docking, ships can collide with offshore platforms, potentially damaging them or the ships. When a ship berths an offshore platform, a berthing absorber is typically installed on the outside of the platform's jacket to absorb the energy of the collision between the ship and the offshore platform, protecting both the ship and the platform and allowing the ship to dock smoothly against the side of the platform. Existing marine platform ship berthing energy absorbers include frustum-shaped rubber bodies, elongated rubber bodies and steel-rubber composites; frustum-shaped rubber bodies and elongated rubber bodies have the advantages of simple structure and easy installation and maintenance, but the overall rigidity of the rubber body is poor, the energy absorption is limited, and the service life is short; the steel-rubber composite energy absorber has good overall rigidity, but if the structure is not designed properly, the steel and rubber are prone to debonding and separation and failure. In addition, due to the influence of sudden ocean conditions or abnormal berthing of ships, the energy absorber is easily damaged and fails. The damaged energy absorber often falls into the ocean, is difficult to salvage, and poses a safety risk to other devices on the seabed. Utility Model Content

[0003] The utility model aims to provide an anti-falling energy absorber for ships mooring on an offshore platform, which can prevent the damaged energy absorber from falling off and facilitates the complete recovery and treatment of the damaged equipment.

[0004] The utility model is realized through the following technical solutions:

[0005] A ship berthing anti-falling energy absorber for an offshore platform comprises a coaxially arranged inner tube and outer tube, the rear end of the inner tube and the front end of the outer tube being connected together via an elastic energy absorbing body, an inner tube blocking plate being provided at the bottom end of the inner tube, a mounting flange being connected to the bottom of the outer tube, and a plurality of anti-falling zippers being fixedly connected between the mounting flange at the bottom of the inner cavity of the outer tube and the bottom surface of the inner tube blocking plate.

[0006] Preferably, the anti-falling zippers are evenly distributed around the circumference and are connected to the bottom surface of the inner tube blocking plate and the mounting flange via threads.

[0007] Preferably, the inner tube and the elastic energy absorbing body are bonded together by an adhesive, and the outer tube and the elastic energy absorbing body are bonded together by an adhesive, and the bonding strength is greater than the tearing strength of the elastic energy absorbing body.

[0008] Furthermore, a plurality of semicircular annular grooves for enhancing bonding strength are regularly provided on the outer surface of the inner cylinder and the inner surface of the outer cylinder.

[0009] Furthermore, a plurality of longitudinal T-shaped grooves for enhancing bonding strength are regularly provided on the outer surface of the inner cylinder and the inner surface of the outer cylinder.

[0010] Preferably, the inner cylinder and the inner cylinder blocking plate are connected through a first fillet weld, and the outer cylinder and the mounting flange are connected through a second fillet weld.

[0011] The utility model has the following beneficial effects:

[0012] (1) The ship berthing energy absorber mainly absorbs impact energy by deformation of the elastic energy absorber. However, when an emergency occurs and the elastic energy absorber reaches its limit, it may be damaged, causing the inner tube and the elastic energy absorber to fall off. However, the anti-falling zipper is used to connect the bottom plate of the inner tube with the mounting flange, which can effectively prevent the inner tube from falling off and the elastic energy absorber is stuck in the device, making it easy to completely recover and dispose of the damaged equipment, reducing the safety risk of damage to other devices on the seabed;

[0013] (2) In the present application, the outer surface of the inner tube and the inner surface of the outer tube are processed with semicircular annular grooves or longitudinal T-grooves, which improve the bonding strength and reliability of the elastic energy absorber to the inner tube and the outer tube, improve the stability of the device itself, prevent damage to the device, and better achieve the absorption of impact energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] In the figure: 1. Inner tube; 2. Elastic energy absorber; 3. Outer tube; 4. Mounting flange; 5. Inner tube blocking plate; 6. Fillet weld 1; 7. Fillet weld 2; 8. Anti-drop zipper. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to specific embodiments, which are intended to explain rather than limit the present invention.

[0017] refer to Figure 1As shown, the utility model provides an anti-falling energy absorber for ship berthing on an offshore platform, comprising an inner tube 1 and an outer tube 3 arranged coaxially, the rear end of the inner tube 1 and the front end of the outer tube 3 are connected together by an elastic energy absorbing body 2, the bottom end of the inner tube 1 is provided with an inner tube blocking plate 5 and connected together by a fillet weld 6, the welding method can be selected from argon arc welding and double-shielded welding, and the inner tube 1 and the elastic energy absorbing body 2 are bonded together by an adhesive, and the outer tube 3 and the elastic energy absorbing body 2 are bonded together by an adhesive, and the bonding strength should be greater than the tear strength of the elastic energy absorbing body 2, and the outer surface of the inner tube 1 and the outer tube The inner surface of 3 is processed with a semicircular annular groove or a longitudinal T-groove. The design of the semicircular annular groove or the longitudinal T-groove improves the bonding strength and reliability of the elastic energy absorber 2 and the outer tube 3. The bottom of the outer tube 3 is connected to the mounting flange 4 through a corner weld 7. The welding method can be argon arc welding and two-circumference welding. The mounting flanges 4 on both sides of the bottom end of the outer tube 3 and the bottom surface of the inner tube plugging plate 5 are connected with anti-falling zippers 8 through threaded connections, and the number of anti-falling zippers 8 is 4 / 6 / 8 and is evenly distributed around the circumference. The energy absorber is connected to the conductor frame of the offshore platform through the mounting flange 4.

[0018] The manufacturing process of this device is as follows:

[0019] Step 1: According to the energy absorber design drawing, use machining equipment to machine the inner tube 1 and the outer tube 3;

[0020] Step 2: Use double-container welding or manual arc welding to weld the inner tube 1 and the inner tube plugging plate 5 together, grind the weld reinforcement smooth, and perform penetrant nondestructive testing and ultrasonic nondestructive testing on the weld;

[0021] Step 3: The outer surface of the inner tube 1 and the inner surface of the outer tube 3 with the inner tube blocking plate 5, which have been welded and tested in the second step and passed the test, are sandblasted to a surface roughness of Ra6.3 to Ra12.5. After the sandblasting is completed and in a dry environment, an adhesive that matches the elastic energy absorber 2 is sprayed on the outer surface of the inner tube 1 and the inner surface of the outer tube 3;

[0022] Step 4: Install the inner cylinder 1 and outer cylinder 3 with the inner cylinder plugging plate 5 in step 3 into the rubber vulcanization mold, and inject the elastic energy absorbing body 2 through the rubber injection equipment. When the rubber overflow hole of the mold overflows the elastic energy absorbing body 2, stop the rubber injection and plug the mold overflow hole;

[0023] Step 5: Place the rubber vulcanization mold in which the elastic energy absorbing body 2 is injected in step 4 into the rubber vulcanization equipment, and perform vulcanization according to the vulcanization process parameters of the elastic energy absorbing body 2;

[0024] Step 6: After the vulcanization in step 5 is completed, wait until the temperature of the rubber fluidized bed mold drops below 60°C, then remove the mold and take out the semi-finished energy absorber;

[0025] Step 7: Use argon arc welding or double arc welding to weld the semi-finished energy absorber in step 6 to the mounting flange 4, and perform penetrant non-destructive testing and ultrasonic non-destructive testing on the weld;

[0026] Step 8: Connect the anti-drop zipper 8 through a threaded connection.

[0027] The operating principle of this device is as follows: the prepared energy absorber is connected to the jacket of the offshore platform through the mounting flange 4, and the impact energy is mainly absorbed by the deformation of the elastic energy absorber 2. When an emergency occurs and the severity of the emergency causes the deformation of the elastic energy absorber 2 to reach its service limit, the energy absorber may be damaged, the elastic energy absorber 2 between the inner tube 1 and the outer tube 3 may fall off, and the inner tube 1 may fall off. The threaded anti-detachment zipper 8 firmly fixes the inner tube 1 on the mounting flange 4, and even if it falls off, it will not fall into the sea water, and the elastic energy absorber 2 is also blocked inside the device to prevent the elastic energy absorber 2 from falling off, making it convenient to recycle the device after damage.

[0028] The above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these embodiments. For ordinary technicians in the technical field of the present invention, without departing from the concept of the present invention, they can also make several simple deductions or substitutions, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A ship berthing anti-falling energy absorber for an offshore platform, characterized in that: The invention comprises an inner tube (1) and an outer tube (3) which are coaxially arranged. The rear end of the inner tube (1) and the front end of the outer tube (3) are connected together via an elastic energy-absorbing body (2). An inner tube blocking plate (5) is provided at the bottom end of the inner tube (1). A mounting flange (4) is connected to the bottom of the outer tube (3). A plurality of anti-drop zippers (8) are fixedly connected between the mounting flange (4) at the bottom of the inner cavity of the outer tube (3) and the bottom surface of the inner tube blocking plate (5).

2. The anti-drop energy absorber for ship berthing on an offshore platform according to claim 1, characterized in that: The anti-drop zippers (8) are evenly distributed around the circumference and are connected to the bottom surface of the inner tube blocking plate (5) and the mounting flange (4) via threads.

3. The anti-drop energy absorber for ship berthing on an offshore platform according to claim 1, characterized in that: The inner tube (1) and the elastic energy absorbing body (2) are bonded together by an adhesive, and the outer tube (3) and the elastic energy absorbing body (2) are bonded together by an adhesive, and the bonding strength is greater than the tearing strength of the elastic energy absorbing body (2).

4. The anti-drop energy absorber for ship berthing on an offshore platform according to claim 3, characterized in that: The outer surface of the inner cylinder (1) and the inner surface of the outer cylinder (3) are regularly provided with a plurality of semicircular annular grooves for enhancing bonding strength.

5. The anti-drop energy absorber for ship berthing on an offshore platform according to claim 3, characterized in that: The outer surface of the inner cylinder (1) and the inner surface of the outer cylinder (3) are regularly provided with a plurality of longitudinal T-shaped grooves for enhancing bonding strength.

6. The anti-drop energy absorber for ship berthing on an offshore platform according to claim 1, characterized in that: The inner cylinder (1) is connected to the inner cylinder blocking plate (5) via a first fillet weld (6), and the outer cylinder (3) is connected to the mounting flange (4) via a second fillet weld (7).

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