Marine guide column positioning device

Abstract

The invention provides a marine guide column type positioning device, comprising a guide column, a thrust member and a resetter; the guide column is a hollow structure and a fixing piece is provided at the lower end; at least two groups of thrust members are arranged and are arranged on the outer periphery of the guide column in an upper and lower distribution; a plurality of resetters are evenly distributed and installed on each group of thrust members; the resetter comprises an outer shell, an inner cylinder, a limit plate, an end cover, a disc spring, a thrust bearing, a main shaft and a roller group; the outer shell is fixed above the thrust member; the limit plate is fixed in the outer shell; the end cover is installed at the front end of the outer shell; the inner cylinder is installed in the outer shell and the front and rear ends are respectively in contact with the limit plate and the end cover; the disc spring and the thrust bearing are distributed and installed in the inner cylinder from back to front; the main shaft passes through the disc spring and the thrust member and passes through the end cover; a screw is provided at the rear end of the main shaft; the main shaft is limited and fixed by locking the screw into the screw; the invention has the advantages of simple structure, high stability and convenient adjustment.

Description

Technical Field

[0001] The invention relates to the field of offshore positioning devices for ships and super-large cages, and in particular to an offshore guide column type positioning device. Background Art

[0002] The offshore positioning of super-large cages in the world today is mainly based on a mooring system composed of various anchors and anchor chains; the horizontal thrust resistance generated by various anchors is the shear force generated by the cone block formed by the anchor claw grabbing the mud after the anchor claw enters the mud and the anchor chain pulls the anchor rod. Even for a large-gripping anchor, the shear area of ​​the anchor claw and its thrust cone block is very limited. It has been proven that for an anchor weighing W, the horizontal thrust generated by the anchor claw is about 3W to 8W (related to the matrix of the seabed and the horizontal angle between the anchor chain and the seabed). The anchor changes with the wind direction and the direction of the ocean current, and cannot be accurately positioned without drifting. Therefore, this method has the defects of low stability and low positioning accuracy. Our company has previously developed an offshore platform with the patent number CN110341903A, which discloses a guide column type mooring positioning offshore platform. After long-term use, the following defects were found: 1. Ductile iron balls are used to roll in contact with the guide column, which uses the good self-lubricating property of ductile iron and can roll without lubrication. However, in actual use, The iron ball will rust after being soaked in seawater, making it unable to roll. The tens of tons of impact force acting on the iron ball will cause great extrusion force, resulting in the sphere being broken, and a large number of dents and pits will be generated on the guide column, and finally fatigue damage; 2. When the guide column is impacted by the waves, the guide sleeve will transmit the force to the iron ball and then to the guide column through the stretching of the stud on the resetter. Tens of tons of impact force will act on several bolts, and the bolts are very easy to deform, fatigue damage, loss of bearing capacity damage or deformation, and difficult to repair; 3. When the resetter is assembled on site, it is difficult to install it into the guide sleeve hole because it weighs hundreds of kilograms. The guide sleeve hole and the resetter require a large assembly gap, resulting in the iron ball forming a cantilever structure on the resetter flange when it is subjected to force in all directions, forming a large alternating stress on the bolts, and easy fatigue damage. Therefore, it needs to be improved. Summary of the invention

[0003] The object of the present invention is to provide a marine guide pillar type positioning device to solve the problems mentioned in the background technology.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A marine guide column positioning device, comprising a guide column, a thrust member and a resetter; the guide column is a hollow structure and a fixing piece is provided at the lower end; the thrust member is provided with at least two groups and is arranged on the outer periphery of the guide column in an upper and lower distribution; each group of the thrust members is evenly distributed and installed with a plurality of resetters; the resetter comprises an outer shell, an inner cylinder, a limit plate, an end cover, a disc spring, a thrust bearing, a main shaft and a roller group; the outer shell is fixed above the thrust member; the limit plate is fixed in the outer shell; the end cover is installed at the front end of the outer shell; the inner cylinder is installed in the outer shell and the front and rear ends are respectively in contact with the limit plate and the end cover; the disc spring and the thrust bearing are distributed and installed in the inner cylinder from back to front; the main shaft passes through the disc spring and the thrust member and the front end passes through the end cover; a screw is provided at the rear end of the main shaft; the screw passes through the limit plate; a nut and a nut retaining ring are installed on the screw corresponding to the rear side of the limit plate; the roller group is eccentrically installed at the front end of the main shaft and contacts with the guide column.

[0006] Further description of the present invention also includes two groups of force transmission components; the force transmission components are respectively arranged at both ends of the disc spring; each group of the force transmission components includes two force transmission pads and a nylon sleeve; an installation groove is formed between the two force transmission pads; the nylon sleeve is installed in the installation groove and contacts with the rotating shaft.

[0007] Further description of the present invention, the main shaft includes a shaft core, a first boss and a second boss; the shaft core passes through two groups of force transmission components and disc springs; the first boss has a diameter larger than the shaft core and is arranged at the front end of the shaft core; the first boss is supported by a thrust bearing and the rear end face touches the front force transmission component; the second boss is larger than the first boss and is arranged at the front end of the first boss; the second boss passes through the end cover and the rear end face touches the thrust bearing.

[0008] Further description of the present invention, the roller group includes a roller seat, a wheel axle and a roller; the roller seat is eccentrically installed at the front end of the main shaft; the axis of the wheel axle is installed on the roller seat perpendicular to the axis of the main shaft; the roller is installed on the wheel axle and contacts with the guide column.

[0009] To further describe the present invention, the fixing member includes a mud entry plate arranged at the lower end of the guide column and a frustum located above the mud entry plate.

[0010] To further describe the present invention, the housing is square; the housing is placed on the thrust member and is locked and fixed thereto by bolts.

[0011] To further describe the present invention, the thrust members are arranged in two groups; and four groups of restorers are installed on each group of the thrust members.

[0012] The beneficial effects of the present invention are:

[0013] A universal wheel structure is formed between the main shaft of the present invention and the eccentrically installed roller group. The thrust bearing can rotate for the impact of waves in any direction, and the rollers on the roller group can also rotate freely. Therefore, the stability of the structure is higher. When subjected to the impact of waves, the thrust member directly transmits the thrust to the bottom of the shell, and then transmits it to the guide column and the seabed through the disc spring, the main shaft and the roller group. The force of this structure is transformed from a point to a surface, which can effectively protect the resetter and extend its service life. In addition, the structure can accurately adjust the position. By turning the nuts on each resetter to adjust the extension length of the main shaft, the position of the ship or the super-large cage can be accurately adjusted. Moreover, for the installation and disassembly of the resetter, the main shaft can be driven into the shell by turning the nut, the disc spring is compressed, and the roller group is separated from the guide column, so that the resetter can be disassembled, which is convenient for disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall structure diagram of the present invention;

[0015] Figure 2 is a top view of the present invention;

[0016] Figure 3 It is a structural diagram of the resetter of the present invention;

[0017] Figure 4 It is a structural diagram of the main axis of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings:

[0019] like Figure 1-4 As shown, a guide column 1 type offshore positioning device includes a guide column 1, a thrust member 2 and a resetter 3.

[0020] The guide column 1 is a hollow structure and has a fixing member 22 at the lower end. The fixing member 22 includes a mud entry plate 111 arranged at the lower end of the guide column 1 and a cone 112 located above the mud entry plate 111; the mud entry plate 111 is cross-shaped. The guide column 1 is a hollow guide column 1 with a diameter of 2m to 3m and a weight of tens of tons. Because it is hollow, the buoyancy in the sea is much greater than the gravity. When the guide column 1 is filled with ballast water, the gravity is greater than the buoyancy, and the cross-shaped mud entry plate 111 at the lower end can be inserted into the mud and sand of the seabed 100. The area of ​​the mud entry plate 111 inserted into the mud and sand is greater than the soil gripping area of ​​the large gripping anchor claws by tens of times, so the horizontal resistance generated is also tens of times that of the anchor claws; the upper part of the mud entry plate 111 is a cone 112, which is used to prevent the guide column 1 from entering the mud too deeply and can be placed on the surface of the seabed 100. After the ballast water in the guide column 1 is emptied, the guide column 1 can float from the seabed.

[0021] The thrust members 2 are arranged in at least two groups and are arranged in an upper and lower distribution on the periphery of the guide column 1, wherein the thrust members 2 are connected to the strong structure of the ship or the super-large cage 200; a plurality of groups of resetters 3 are evenly distributed and installed on each group of the thrust members 2; the resetter 3 includes an outer shell 31, an inner cylinder 32, a limit plate 33, an end cover 34, a disc spring 35, a thrust bearing 36, a main shaft 37 and a roller 383 group 38; the outer shell 31 is fixed above the thrust member 2; the limit plate 33 is fixed in the outer shell 31; the end cover 34 is installed at the front end of the outer shell 31; the inner cylinder 32 is installed in the outer shell 31 and the front and rear ends are respectively in contact with the limit plate 33 and the end cover 34; the disc spring 35 and the thrust bearing 36 are connected from The main shaft 37 is installed in the inner cylinder 32 from the back to the front; the main shaft 37 passes through the disc spring 35 and the thrust member 2 and the front end passes through the end cover 34; the rear end of the main shaft 37 is provided with a screw rod 371; the screw rod 371 passes through the limit plate 33; the screw rod 371 is installed with a nut 3711 and a nut retaining ring 3712 corresponding to the rear side of the limit plate 33, and the nut 3711 is screwed into the screw rod 371 to press the nut retaining ring 3712 on the limit plate 33, thereby limiting the length of the main shaft 37 extending from the front side; the roller 383 group 38 is eccentrically installed at the front end of the main shaft 37 and contacts with the guide column 1; it also includes two groups of force transmission components 39; the force transmission components 39 are respectively arranged at both ends of the disc spring 35; each group of the force transmission components 39 Each of them includes two force transmission pads 391 and a nylon sleeve 392; an installation groove is formed between the two force transmission pads 391; the nylon sleeve 392 is installed in the installation groove and contacts the rotating shaft; the main shaft 37 includes a shaft core 372, a first boss 373 and a second boss 374; the shaft core 372 passes through two groups of force transmission components 39 and disc springs 35; the diameter of the first boss 373 is larger than that of the shaft core 372 and is arranged at the front end of the shaft core 372; the first boss 373 is supported by a thrust bearing 36 and the rear end face touches the front force transmission component 39; the diameter of the second boss 374 is larger than that of the first boss 373 and is arranged at the front end of the first boss 373; the second boss 374 passes through the end cover 34 and the rear end face touches the thrust bearing 36. The roller 383 group 38 comprises a roller seat 381, a wheel shaft 382 and a roller 383; the roller seat 381 is eccentrically mounted on the front end of the main shaft 37; the axis of the wheel shaft 382 and the axis of the main shaft 37 are mounted on the roller seat 381 perpendicularly to each other; the roller 383 is mounted on the wheel shaft 382 and in contact with the guide column 1; the position of the ship or the super-large cage 200 can be accurately adjusted by adjusting the extension length of the main shaft 37 by screwing the nut 3711 on each resetter 3, and the installation and removal of the resetter 3 can also be carried out by screwing the nut 3711 to drive the main shaft 37 into the housing 31, the disc spring 35 is compressed, and the roller 383 group 38 is separated from the guide column 1, and the resetter 3 can be removed;The rotation of the main shaft 37 itself is combined with the roller 383 group 38 to form a universal wheel structure, so that it can adapt to the impact of waves in all directions. The shell 31 is square; the shell 31 is placed on the thrust member 2 and is locked and fixed with it by bolts. After bearing the impact of the waves, the roller 383 on the resetter 3 in the force direction on one side is pressed by the guide column 1, thereby driving the main shaft 37 to push backward, and the main shaft 37 transmits the force to the thrust bearing 36 and the force transmission pad 391, and the force transmission pad 391 is then transmitted to the disc spring 35, so that the disc spring 35 contracts, and the disc spring 35 squeezes the force transmission pad 391 on the rear side, and the force transmission pad 391 is then transmitted to the limit plate 33 and finally transmitted to the shell 31. The shell 31 is installed flat on the thrust member 2, and the force is transmitted to the thrust member 2, and finally to the strong structure of the ship or the cage. After the impact of the waves disappears, the disc spring 35 is reset, driving the ship or the super-large cage 200 to reset. ;

[0022] In the present design, two groups of thrust members 2 are provided; four groups of resetters 3 are installed on each group of thrust members 2.

[0023] The working principle of this embodiment:

[0024] After the guide column 1 and the resetter 3 are installed and adjusted, when the sea level rises or falls, the ship or super-large cage 200 rises accordingly, and the roller 383 rolls up and down against the guide column 1. When subjected to the impact of waves, the main shaft 37 rotates to adapt to the impact direction of the waves. At the same time, since the ship or super-large cage 200 will have an impact after being hit by waves, and the guide column 1 is fixed, the guide column 1 will have an extrusion effect with the roller group 383 group 38 in a certain direction. After the roller group 383 group 38 is subjected to force, the main shaft 37 is pressed into the outer shell 31. After the impact disappears, the main shaft 37 is reset by the disc spring 35, thereby controlling the reset of the ship or super-large cage 200.

[0025] The above description does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A marine guide post positioning device, characterized in that: It includes a guide column, a thrust member and a resetter; the guide column is a hollow structure and a fixing piece is provided at the lower end; the thrust members are arranged in at least two groups and are arranged on the outer periphery of the guide column in an upper and lower distribution; each group of the thrust members is evenly installed with a number of resetters; the resetter includes an outer shell, an inner cylinder, a limit plate, an end cover, a disc spring, a thrust bearing, a main shaft and a roller group; the outer shell is fixed above the thrust member; the limit plate is fixed in the outer shell; the end cover is installed at the front end of the outer shell; the inner cylinder is installed in the outer shell and the front and rear ends are respectively in contact with the limit plate and the end cover; the disc spring and the thrust bearing are distributed and installed in the inner cylinder from back to front; the main shaft passes through the disc spring and the thrust member and the front end passes through the end cover; a screw is provided at the rear end of the main shaft; the screw passes through the limit plate; a nut and a nut retaining ring are installed on the screw corresponding to the rear side of the limit plate; the roller group is eccentrically installed at the front end of the main shaft and contacts with the guide column.

2. A marine guide post type positioning device according to claim 1, characterized in that: It also includes two groups of force transmission components; the force transmission components are respectively arranged at both ends of the disc spring; each group of the force transmission components includes two force transmission pads and a nylon sleeve; an installation groove is formed between the two force transmission pads; the nylon sleeve is installed in the installation groove and contacts the rotating shaft.

3. The marine guide pillar positioning device according to claim 2, characterized in that: The main shaft includes a shaft core, a first boss and a second boss; the shaft core passes through two groups of force transmission components and disc springs; the first boss has a diameter larger than the shaft core and is arranged at the front end of the shaft core; the first boss is supported by a thrust bearing and the rear end face touches the front force transmission component; the second boss is larger than the first boss and is arranged at the front end of the first boss; the second boss passes through the end cover and the rear end face touches the thrust bearing.

4. The marine guide pillar positioning device according to claim 1, characterized in that: The roller assembly comprises a roller seat, a wheel axle and a roller; the roller seat is eccentrically mounted at the front end of the main shaft; the axis of the wheel axle is mounted on the roller seat perpendicularly to the axis of the main shaft; the roller is mounted on the wheel axle and contacts the guide column.

5. The marine guide pillar positioning device according to claim 1, characterized in that: The fixing member comprises a mud entry plate arranged at the lower end of the guide column and a frustum located above the mud entry plate.

6. The marine guide pillar positioning device according to claim 1, characterized in that: The shell is square; the shell is placed on the thrust member and is locked and fixed thereto by bolts.

7. The marine guide pillar positioning device according to claim 1, characterized in that: The thrust members are arranged in two groups; and four groups of resetters are installed on each group of the thrust members.

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