Ship berthing secondary energy absorber for ocean platform

Abstract

The utility model discloses a ship berthing secondary energy absorber for an ocean platform, which comprises an inner cylinder and an outer cylinder which are coaxially arranged, the lower end of the inner cylinder is connected with the upper end of the outer cylinder through a cylindrical elastic energy absorbing body, the bottom of the inner cylinder is provided with an inner cylinder blocking plate, and the top of the inner cylinder is provided with an inner cylinder sealing plate and a connector used for being connected with an impact rod. The bottom of the outer cylinder is connected with a mounting flange; the connector is composed of a hollow shaft and an annular elastic energy-absorbing body, the top of the inner cylinder is connected with the hollow shaft in a penetrating mode, the hollow shaft is perpendicular to the inner cylinder, the central axis of the hollow shaft and the inner cylinder sealing plate are located on the same horizontal line, and the annular elastic energy-absorbing body is coaxially arranged in the center of the outer side of the hollow shaft and connected with the upper end of the inner cylinder and the center of the inner cylinder sealing plate; impact energy is absorbed through secondary deformation of the cylindrical elastic energy absorption bodies and the annular elastic energy absorption bodies, the impact force on the jacket when a ship berths is reduced, the impact energy absorption capacity is enhanced, and the ocean platform device can be effectively protected.

Description

Technical Field

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

[0002] Offshore platforms are key equipment for the development of offshore oil and gas resources. Drilling, oil and gas extraction, storage, power, communications, and navigation equipment are installed on offshore platforms, making them indispensable for offshore oil and gas resource development. The equipment used on offshore platforms and the extracted oil and gas resources need to be transported by ships, and during docking, ships can collide with offshore platforms, easily damaging the platforms or ships. When a ship docks at an offshore platform, it is generally necessary to install a berthing energy absorber on the outside of the offshore platform's jacket to absorb the collision energy between the ship and the offshore platform, protecting the safety of the ship and the offshore platform and allowing the ship to dock smoothly on the side of the platform. Existing offshore platform ship berthing energy absorbers include frustum-shaped rubber bodies, elongated rubber bodies, and composites of steel and rubber. These energy absorbers, such as frustum-shaped rubber bodies and elongated rubber bodies, have the advantages of simple structure and easy installation and maintenance. However, their overall rigidity is poor, their energy absorption is limited, and their lifespan is short, making them ineffective in ensuring the safety of offshore resource extraction platforms. Utility Model Content

[0003] The utility model aims to provide a secondary energy absorber for ship berthing on an offshore platform, which can effectively protect offshore platform devices and enhance the ability to absorb impact energy.

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

[0005] A secondary energy absorber for ship berthing on an offshore platform comprises a coaxially arranged inner tube and outer tube. The lower end of the inner tube is connected to the upper end of the outer tube via a cylindrical elastic energy absorber. The bottom of the inner tube is provided with an inner tube blocking plate, the top of the inner tube is provided with an inner tube sealing plate and a connector for connecting to a striking rod, and the bottom of the outer tube is connected to a mounting flange.

[0006] The connecting head is composed of a hollow shaft and a circular elastic energy-absorbing body. The top of the inner cylinder is connected through the hollow shaft. The hollow shaft is perpendicular to the inner cylinder and the central axis of the hollow shaft and the inner cylinder sealing plate are located on the same horizontal line. The circular elastic energy-absorbing body is coaxially arranged at the outer center of the hollow shaft and is connected to the upper end of the inner cylinder and the center of the inner cylinder sealing plate.

[0007] Preferably, the inner cylinder, the inner cylinder sealing plate and the hollow shaft are bonded together with the annular elastic energy-absorbing body by an adhesive.

[0008] Preferably, the inner tube and the cylindrical elastic energy absorbing body are bonded together by an adhesive, and the outer tube and the cylindrical elastic energy absorbing body are bonded together by an adhesive, and the bonding strength is greater than the tearing strength of the cylindrical elastic energy absorbing body.

[0009] Furthermore, the outer surface of the inner cylinder and the inner surface of the outer cylinder are regularly provided with grooves for enhancing bonding strength.

[0010] Preferably, a plurality of anti-fall-off zippers are fixedly connected between the mounting flange and the bottom surface of the inner tube blocking plate.

[0011] Preferably, the inner cylinder and the inner cylinder blocking plate are connected by corner weld one, the inner cylinder and the inner cylinder sealing plate are connected by corner weld three, the hollow shaft and the inner cylinder sealing plate are connected by corner weld four, and the outer cylinder and the mounting flange are connected by corner weld two.

[0012] Preferably, the connecting head is fixed with a striking rod via a pin.

[0013] Compared with the existing technology, the present invention has the following beneficial effects: the ship berthing energy absorber mainly relies on the deformation of the elastic energy absorbing body to absorb impact energy. The present solution is designed with a connecting head including a hollow shaft and a circular elastic energy absorbing body for connecting with the impact rod. The impact energy is absorbed through the secondary deformation of the cylindrical elastic energy absorbing body and the circular elastic energy absorbing body, thereby reducing the impact force on the jacket when the ship is berthing. Compared with the existing technology, the impact energy absorption capacity is further enhanced, and the offshore platform equipment can be effectively protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model embodiment 1;

[0015] Figure 2 This is a side structural diagram of the utility model embodiment 1;

[0016] Figure 3 This is a schematic diagram of the overall structure of the second embodiment of the utility model.

[0017] In the figure: 1. Inner tube; 2. Cylindrical elastic energy-absorbing body; 3. Outer tube; 4. Mounting flange; 5. Inner tube blocking plate; 6. Fillet weld one; 7. Fillet weld two; 8. Inner tube sealing plate; 9. Fillet weld three; 10. Hollow shaft; 11. Fillet weld four; 12. Circular elastic energy-absorbing body; 13. Impact rod; 14. Anti-drop zipper. DETAILED DESCRIPTION

[0018] 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.

[0019] Example 1

[0020] refer to Figure 1 As shown, this embodiment 1 provides a secondary energy absorber for ship berthing on an offshore platform, comprising an inner tube 1 and an outer tube 3 arranged coaxially, the lower end of the inner tube 1 and the upper end of the outer tube 3 are connected together by a cylindrical 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, the outer surface of the inner tube 1 and the inner surface of the outer tube 3 are processed with semicircular annular grooves, which improve the bonding strength and reliability of the elastic energy absorbing body 2 and the outer tube 3, the top of the inner tube 1 is provided with an inner tube sealing plate 8 and a connector connected by a fillet weld 9, the connector is composed of a hollow shaft 10 and a circular elastic energy absorbing body 12, reference Figure 2 As shown, the top of the inner tube 1 is connected through the hollow shaft 10, the hollow shaft 10 is perpendicular to the inner tube 1 and the central axis of the hollow shaft 10 is on the same horizontal line as the inner tube sealing plate 8, the hollow shaft 10 and the inner tube sealing plate 8 are connected by a corner weld 11, and the annular elastic energy absorbing body 12 is coaxially arranged at the outer center of the hollow shaft 10, and is connected to the upper end of the inner tube 1 and the center of the inner tube sealing plate 8. The bottom of the outer tube 3 is connected to the mounting flange 4 through a corner weld 7, and the welding method can be argon arc welding and two-shield welding. The energy absorber is connected to the jacket of the offshore platform through the mounting flange 4, and the connecting head of the energy absorber is connected to the impact rod 13 through a pin shaft. The impact energy is absorbed by the secondary deformation of the cylindrical elastic energy absorbing body 2 and the annular elastic energy absorbing body 12, thereby reducing the impact force on the jacket when the ship is berthed.

[0021] Example 2

[0022] refer to Figure 3 As shown, this embodiment 2 provides a secondary energy absorber for ship berthing on an offshore platform, comprising an inner tube 1 and an outer tube 3 arranged coaxially, the lower end of the inner tube 1 and the upper end of the outer tube 3 are connected together by a cylindrical elastic energy absorbing body 2, the bottom end of the inner tube 1 is provided with an inner tube plugging 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, the outer surface of the inner tube 1 and the inner surface of the outer tube 3 are processed with longitudinal T-grooves, which improve the bonding strength and reliability of the elastic energy absorbing body 2 and the outer tube 3, the top of the inner tube 1 is provided with an inner tube sealing plate 8 and a connector connected by a fillet weld 9, the connector is composed of a hollow shaft 10 and a circular elastic energy absorbing body 12, reference Figure 2As shown, the top of the inner cylinder 1 is connected through the hollow shaft 10, the hollow shaft 10 is perpendicular to the inner cylinder 1 and the central axis of the hollow shaft 10 is located at the same horizontal line as the inner cylinder sealing plate 8, the hollow shaft 10 and the inner cylinder sealing plate 8 are connected by a fillet weld 11, the annular elastic energy absorbing body 12 is coaxially arranged at the outer center of the hollow shaft 10, and is connected to the upper end of the inner cylinder 1 and the center of the inner cylinder sealing plate 8, the bottom of the outer cylinder 3 is connected to the mounting flange 4 by a fillet weld 7, and the welding method can be selected from argon arc welding and two-shield welding. The mounting flanges 4 on both sides of the bottom end of the outer cylinder 3 are connected to the inner cylinder sealing plate 8. The bottom surfaces of the inner tube plugging plates 5 are connected with anti-falling zippers 8 by means of threaded connection, and the number of anti-falling zippers 8 is 4 / 6 / 8 and evenly distributed around the circumference. The energy absorber is connected to the jacket of the offshore platform through the mounting flange 4. The connector of the energy absorber is connected to the impact rod 13 through a pin shaft. The impact energy is absorbed through the secondary deformation of the cylindrical elastic energy absorbing body 2 and the annular elastic energy absorbing body 12, thereby reducing the impact force on the jacket when the ship is berthing, and can effectively prevent the inner tube from falling off when impacted, affecting the buffering of the ship when docking.

[0023] The manufacturing process of this device is as follows:

[0024] Step 1: According to the energy absorber design drawing, use machining equipment to machine the inner tube 1 and the outer tube 3;

[0025] Step 2: Use argon arc welding, double shielded arc welding or manual arc welding to weld the inner cylinder 1, the inner cylinder blocking plate 5 and the inner cylinder sealing plate 8 together, and weld the inner cylinder 1, the inner cylinder sealing plate 8 and the hollow shaft 10 together, grind the weld reinforcement smooth, and perform penetrant nondestructive testing and ultrasonic nondestructive testing on the weld;

[0026] Step 3: The outer surface of the inner cylinder 1 and the inner surface of the outer cylinder 3 with the inner cylinder blocking plate 5, the inner cylinder sealing plate 8, and the hollow shaft 10, which have been welded and passed the inspection in the second step, 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 cylindrical elastic energy absorber 2 and the annular elastic energy absorber 12 is sprayed on the outer surface of the inner cylinder 1 and the inner surface of the outer cylinder 3;

[0027] Step 4: Install the inner cylinder 1 and outer cylinder 3 with the inner cylinder blocking plate 5, inner cylinder sealing plate 8, and hollow shaft 10 in step 3 into a rubber vulcanization mold, and inject the cylindrical elastic energy absorbing body 2 and the annular elastic energy absorbing body 12 through a rubber injection device. When the overflow hole of the mold overflows the cylindrical elastic energy absorbing body 2 and the annular elastic energy absorbing body 12, stop the rubber injection and seal the overflow hole of the mold;

[0028] Step 5: Place the rubber vulcanization mold completed by injecting the cylindrical elastic energy absorbing body 2 and the annular elastic energy absorbing body 12 in step 4 into the rubber vulcanization equipment, and perform vulcanization according to the vulcanization process parameters of the cylindrical elastic energy absorbing body 2 and the annular elastic energy absorbing body 12;

[0029] 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;

[0030] Step 7: Use argon arc welding or double shielded arc welding to weld the semi-finished energy absorber in step 6 to the mounting flange 4, and perform penetrant nondestructive testing and ultrasonic nondestructive testing on the weld.

[0031] Step 8: Connect the anti-drop zipper 14 through a threaded connection.

[0032] The energy absorber can be manufactured by repeating the above steps to form the front end and the rear end of the energy absorber respectively, and then connected together by welding.

[0033] 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 secondary energy absorber for ship berthing on an offshore platform, characterized in that: The invention comprises an inner cylinder (1) and an outer cylinder (3) which are coaxially arranged, wherein the lower end of the inner cylinder (1) and the upper end of the outer cylinder (3) are connected together via a cylindrical elastic energy-absorbing body (2), an inner cylinder blocking plate (5) is provided at the bottom of the inner cylinder (1), an inner cylinder sealing plate (8) and a connector for connecting to a striking rod (13) are provided at the top of the inner cylinder (1), and a mounting flange (4) is connected to the bottom of the outer cylinder (3); The connector is composed of a hollow shaft (10) and a circular elastic energy-absorbing body (12); the top of the inner cylinder (1) is connected through the hollow shaft (10); the hollow shaft (10) is perpendicular to the inner cylinder (1) and the central axis of the hollow shaft (10) is located on the same horizontal line as the inner cylinder sealing plate (8); the circular elastic energy-absorbing body (12) is coaxially arranged at the outer center of the hollow shaft (10) and is connected to the upper end of the inner cylinder (1) and the center of the inner cylinder sealing plate (8).

2. The secondary energy absorber for ship berthing on an offshore platform according to claim 1, characterized in that: The inner cylinder (1), the inner cylinder sealing plate (8), the hollow shaft (10), and the annular elastic energy absorbing body (12) are bonded together by an adhesive.

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

4. The secondary 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 grooves for enhancing bonding strength.

5. The secondary energy absorber for ship berthing on an offshore platform according to claim 1, characterized in that: A plurality of anti-fall-off zippers (14) are fixedly connected between the mounting flange (4) and the bottom surface of the inner tube blocking plate (5).

6. The secondary 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) through corner weld one (6), the inner cylinder (1) is connected to the inner cylinder sealing plate (8) through corner weld three (9), the hollow shaft (10) is connected to the inner cylinder sealing plate (8) through corner weld four (11), and the outer cylinder (3) is connected to the mounting flange (4) through corner weld two (7).

7. The secondary energy absorber for ship berthing on an offshore platform according to claim 1, characterized in that: The connecting head is fixed with a striking rod (13) via a pin shaft.

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