A mooring bumper

Abstract

The utility model provides a kind of mooring buffer, it is protected around the load of mooring rope between mooring ship and wharf, including buffer mechanism, piston accumulator and gas cylinder group, the buffer mechanism includes buffer oil cylinder, buffer oil cylinder is connected with the oil cavity of piston accumulator, the piston accumulator is connected with gas cylinder group, adjusts gas cavity pressure by gas cylinder group, and then adjusts the buffer load provided by buffer mechanism to mooring rope, the mooring buffer provided in the scheme solves the elastic buffering problem of emergent impact load, and its provided load buffering protection range is adjustable, improves the safe mooring reliability of mooring ship.

Description

Technical Field

[0001] This utility model relates to the field of marine equipment technology, specifically to an auxiliary mooring device for docks or ships. Background Technology

[0002] When a vessel is moored at a dock, encountering severe sea conditions, increased wind speed and wave height, and intensified rolling motion, conventional mooring devices and lines may be unable to withstand the load, potentially leading to damage and loss of control, thus posing a greater risk. Therefore, when sea conditions are forecast to worsen, moored vessels typically need to dismount and proceed to anchorage.

[0003] However, due to certain special operational requirements, ships must reliably maintain their mooring status under set, relatively poor sea conditions, which necessitates the design of a device that can protect the mooring equipment and mooring lines.

[0004] CN105217453B discloses "an impact load buffer, comprising: a fixed pulley, a movable pulley disposed at a certain distance from the fixed pulley, and a hoisting cable connecting the fixed pulley and the movable pulley as a whole; wherein, the axle of the movable pulley is hinged to the piston rod of a hydraulic cylinder, the upper cavity of the hydraulic cylinder is connected to several energy storage devices, and the lower cavity of the hydraulic cylinder is connected to an oil tank; a sliding crossbeam is mounted on a guide column disposed between the upper and lower crossbeams;" Specifically, the hoisting cable drives the movable pulley to move upward, thereby driving the piston rod of the hydraulic cylinder to move upward, thus forcing the hydraulic oil in the upper cavity of the hydraulic cylinder to flow into the energy storage device, causing the rubber bladder filled with inert gas inside the energy storage device to be compressed, thereby achieving the buffering effect of impact load.

[0005] However, when the energy storage device in the above scheme is subjected to impact loads exceeding its buffering capacity, i.e., in severe sea conditions, the buffer in the above scheme will fail because it cannot adjust the buffering capacity in time, thus causing the buffer to fail. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a mooring buffer that can adjust the buffering pressure in a timely manner according to sea conditions, providing load protection for the mooring lines between the mooring vessel and the dock, solving the problem of elastic buffering of sudden impact loads, and the load buffering protection range it provides is adjustable, thereby improving the safe mooring reliability of the mooring vessel.

[0007] To achieve the above objectives, the mooring buffer provided by this utility model, which is wound around the mooring rope, includes a buffer mechanism, a piston accumulator, and a gas cylinder assembly. The piston accumulator includes an oil chamber and an air chamber. The buffer mechanism is connected to the oil chamber of the piston accumulator, and the air chamber of the piston accumulator is connected to a gas cylinder group. The pressure of the air chamber is adjusted by the gas cylinder group, thereby adjusting the buffer load of the buffer mechanism.

[0008] Furthermore, the buffer mechanism includes a buffer pulley, a buffer cylinder, a guide roller, and a support. The buffer mechanism has a "mountain" shaped structure. The support is the base of the buffer mechanism. The buffer cylinder is located vertically in the middle of the support. There are two guide rollers, which are rotatably arranged on both sides of the support.

[0009] Furthermore, the buffer cylinder is provided with a cylinder barrel and a piston rod, the upper end of the piston rod is connected to a buffer pulley, and the lower end of the piston rod moves up and down inside the cylinder barrel.

[0010] Furthermore, the cylinder is divided into a rod chamber and a rodless chamber by the piston rod, and the rodless chamber of the buffer cylinder is connected to the oil chamber of the piston accumulator.

[0011] Furthermore, the piston rod is provided with double lugs at its upper end, and the buffer pulley is rotatably disposed between the double lugs.

[0012] Furthermore, the pressure of the gas cylinder assembly is adjustable.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By adjusting the capacity of the gas cylinder assembly or the pressure of the high-pressure gas filling it, the set pressure generated on the piston rod of the buffer cylinder is controlled, thereby adjusting the buffer load range provided by the mooring buffer in this solution. Furthermore, the mooring buffer provided by this invention has a simple structure and is easy to arrange. Existing mooring ropes can be directly wound around the buffer mechanism, increasing its elasticity and elongation increment. This not only enables it to cope with sudden impact stresses but also improves the reliable maintenance of the safe mooring state of the moored vessel. Attached Figure Description

[0014] Figure 1 A schematic diagram illustrating the principle of the mooring buffer provided by this utility model; Figure 2 A front view of the buffer mechanism of the mooring buffer provided by this utility model; Figure 3 A side view of the buffer mechanism of the mooring buffer provided by this utility model.

[0015] The following are the component labels in the attached diagram: 10. Buffer mechanism; 20. Piston accumulator; 30. Gas cylinder assembly; 11. Support; 12. Buffer cylinder; 121. Cylinder barrel; 122. Piston rod; 123. Double ear plate; 13. First pin; 14. Buffer pulley; 15. Guide roller; 16. Second pin. 40. Mooring rope. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to preferred embodiments and accompanying drawings: See Figure 1 The diagram shown is a schematic diagram of the mooring buffer provided by this utility model.

[0017] As shown in the figure, the mooring buffer in this example includes a buffer mechanism 10, a piston accumulator 20, and a gas cylinder group 30. The buffer mechanism 10 is connected to the oil chamber of the piston accumulator 20, which is filled with hydraulic oil. The piston accumulator 20 also includes a gas chamber, which is connected to the gas cylinder group 30. The gas cylinder group is filled with high-pressure nitrogen. The oil chamber pressure of the piston accumulator 20 can be controlled by the capacity or number of gas cylinder groups and the pressure of the high-pressure nitrogen in the gas cylinder group, thereby controlling the buoyancy of the up-and-down movement of the buffer mechanism 10.

[0018] See also Figure 2 and Figure 3 The buffer mechanism 10 includes a buffer cylinder 12. The cylinder barrel 121 of the buffer cylinder is provided with a piston rod 122 that can move up and down. The moving part of the piston rod is the rod chamber of the buffer cylinder, and the lower part of the piston rod is the rodless chamber. The rod chamber and the rodless chamber together form the cylinder barrel of the buffer cylinder. The volume of the chamber is changed by the up and down movement of the piston rod. The rodless chamber of the buffer cylinder 12 is connected to the oil chamber of the piston accumulator 20, and the internal fluid is hydraulic oil. The gas chamber of the piston accumulator 20 is connected to the gas cylinder group 30. The pressure of the high-pressure nitrogen gas filled in the gas cylinder group is controllable.

[0019] In a specific embodiment, the gas pressure of the gas cylinder group is kept in balance with the hydraulic pressure of the buffer cylinder. The buoyancy of the piston rod of the buffer cylinder moving up and down is changed by adjusting the pressure provided by the gas cylinder group.

[0020] The buffer mechanism 10 also includes a support 11, a first pin 13, a buffer pulley 14, a guide pulley 15, and a second pin 16. The buffer mechanism 10 has an overall "mountain" shaped structure. The support 11 is the "mountain" shaped base of the buffer mechanism. The middle vertical part is configured with a buffer cylinder 12, and two guide rollers 15 are configured on both sides. The two guide rollers 15 are rotatably fixed to both sides of the support 11 through two second pins 16. The buffer mechanism 10 configured in this way is the main buffer structure of the mooring buffer provided in this embodiment.

[0021] Furthermore, the piston rod 122 of the buffer cylinder 12 is provided with a double ear plate 123 at the upper end. A first pin 13 with a buffer pulley 14 is fixed in the middle of the double ear plate 123. The first pin 13 and the buffer pulley 14 are in clearance fit. When the piston rod 122 moves up and down, it can drive the buffer pulley 14 at the top to move up and down.

[0022] In a preferred embodiment, see Figure 2 The mooring rope 40 passes around the guide roller 15 on one side of the support 11, through the buffer pulley 14 connected to the top of the buffer cylinder, and then out from the guide roller 15 on the other side of the support. One end of the mooring rope can be fixed to the mooring bollard on the dock, and the other end is connected to the mooring boat.

[0023] The working principle of the mooring buffer provided in this embodiment is as follows: When faced with a sudden impact load, the mooring rope is taut and under tension, the buffer pulley is under pressure, and the piston rod connected to the buffer pulley is simultaneously subjected to the downward pressure brought by the tension of the mooring rope. When the tension on the mooring rope exceeds 50% of the buoyancy provided to the piston rod by the hydraulic pressure of the buffer cylinder, the piston rod moves downward and the rodless chamber of the buffer cylinder is compressed. The stroke L of the piston rod moving downward is the length of the mooring rope released. When the impact load stops or eases, the tension on the mooring rope decreases, and the piston rod of the buffer cylinder extends again or returns to its original state. During the buffering process of the buffer mechanism, only the gas in the gas cylinder group and the piston accumulator is compressed or expanded. The buffer mechanism is connected to the gas cylinder group through the piston accumulator, making the mooring buffer provided in this embodiment similar to a gas spring, which can operate continuously without external force.

[0024] In the pressure adjustment setting of the gas cylinder group, the capacity of the gas cylinder group or the pressure of the high-pressure nitrogen filling the gas cylinder group can be changed. The final pressure setting value needs to take into account the load of the mooring vessel and the deformation strength of the mooring rope that is compatible with it. The setting method will not be described in detail here.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A mooring buffer, characterized in that, It includes a buffer mechanism, a piston accumulator, and a gas cylinder assembly; the piston accumulator includes an oil chamber and a gas chamber, the buffer mechanism is connected to the oil chamber of the piston accumulator, and the gas chamber of the piston accumulator is connected to the gas cylinder assembly.

2. The mooring buffer according to claim 1, characterized in that, The buffer mechanism includes a buffer pulley, a buffer cylinder, guide rollers, and a support. The buffer mechanism has a "mountain" shaped structure. The support is the base of the buffer mechanism. The buffer cylinder is located vertically in the middle of the support. There are two guide rollers, which are rotatably arranged on both sides of the support.

3. The mooring buffer according to claim 2, characterized in that, The buffer cylinder is equipped with a cylinder barrel and a piston rod. The upper end of the piston rod is connected to a buffer pulley, and the lower end of the piston rod moves up and down inside the cylinder barrel.

4. The mooring buffer according to claim 3, characterized in that, The piston rod is provided with double lugs at its upper end, and the buffer pulley is rotatably located between the double lugs.

5. The mooring buffer according to claim 3, characterized in that, The cylinder is divided into a rod chamber and a rodless chamber by the piston rod, and the rodless chamber of the buffer cylinder is connected to the oil chamber of the piston accumulator.

6. The mooring buffer according to claim 1, characterized in that, The pressure of the gas cylinder group is adjustable.

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