CN218990109U

CN218990109U - Spud leg coupling shock-absorbing structure

Info

Publication number: CN218990109U
Application number: CN202223073663.5U
Authority: CN
Inventors: 黄俊华; 刘海超; 王军; 罗成喜; 钟耀
Original assignee: PowerChina Zhongnan Engineering Corp Ltd
Current assignee: PowerChina Zhongnan Engineering Corp Ltd
Priority date: 2022-11-18
Filing date: 2022-11-18
Publication date: 2023-05-09
Anticipated expiration: 2032-11-18

Abstract

The utility model discloses a pile leg coupling damping structure which comprises a receiver and an outer sleeve, wherein a damping device is arranged in the outer sleeve, and the receiver is arranged at the top of the damping device; the damping device comprises a plurality of layers of damping units which are arranged from bottom to top along the height direction of the outer sleeve, and each layer of damping unit comprises a sandbox and a plurality of friction blocks arranged on the sandbox; the bottom of the damping unit at the bottom layer is provided with a support bottom which is connected with the inner wall of the outer sleeve; the top layer is provided with a plurality of first cushion blocks which are respectively and correspondingly arranged on the upper parts of the friction blocks, one side of each first cushion block is connected with the receiver, and the other side of each first cushion block is contacted with the inner wall of the outer sleeve. This spud leg coupling shock-absorbing structure passes through the cooperation of sandbox and friction group piece, with load transmission and conversion, simple structure, installation are convenient and the cost is lower.

Description

Spud leg coupling shock-absorbing structure

Technical Field

The utility model belongs to the technical field of limit support of offshore platforms, and particularly relates to a pile leg coupling damping structure.

Background

Offshore platform structures mainly comprise an upper block and an underwater support structure, which are typically required to be installed in a butt joint at sea. For offshore installation of large and heavy upper blocks, a floating method is generally adopted to realize the limit connection of the upper block and an underwater supporting structure (such as a jacket and the like). The floating method is mainly applied to the construction of ocean oil and gas platforms and offshore converter stations at present, and the weight level of the ocean oil and gas platforms and the offshore converter stations is ten thousand tons. In the float-over installation process, a buffer device is required to be installed at the structural butt joint position between the upper engineering block and the underwater supporting structure so as to relieve the collision between the upper engineering block and the underwater supporting structure. The pile leg coupler is a necessary facility for flexibly unloading the load to the foundation in the floating construction, but the existing coupler is very expensive in cost because special rubber is adopted as a damping material to meet the requirement of unloading the large load. The weight of the upper block of the offshore platform is about three kilotons, which is far lower than the weight of the offshore oil and gas platform and the offshore converter station, and the split cost is higher if the existing pile leg coupler is used.

The utility model patent grant publication number CN205975549U of China discloses a spud leg coupling damping device, belongs to the technical field of transportation and installation of offshore platforms, and comprises a horizontal damping block arranged between a receiver and an outer sleeve and at least 2 vertical damping blocks arranged between the receiver and a guide cylinder and sleeved on a center pile of the receiver, wherein the key point is that: the vertical shock-absorbing block is characterized in that the adjacent vertical shock-absorbing block is provided with a positioning structure, and the positioning structure comprises positioning grooves and positioning bosses which are respectively arranged on the contact surfaces of the adjacent vertical shock-absorbing blocks and are arranged along the diameter direction of the adjacent vertical shock-absorbing block. The damping device provided by the utility model needs to be provided with the horizontal damping block and the vertical damping block respectively, and also needs to be provided with a positioning structure design for the vertical damping block, so that the structure is relatively complex and the cost is high.

Disclosure of Invention

The utility model aims to provide a pile leg coupling damping structure which is simple in structure, convenient and fast to install and low in cost, and load is transferred and converted through the cooperation of a sandbox and a friction block.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a spud leg coupling shock-absorbing structure, includes receiver and outer sleeve, its structural feature is: the outer sleeve is internally provided with a damping device, and the receiver is arranged at the top of the damping device; the damping device comprises a plurality of layers of damping units which are arranged from bottom to top along the height direction of the outer sleeve, and each layer of damping unit comprises a sandbox and a plurality of friction blocks arranged on the sandbox; the bottom of the damping unit at the bottom layer is provided with a support bottom which is connected with the inner wall of the outer sleeve; the top layer is provided with a plurality of first cushion blocks which are respectively and correspondingly arranged on the upper parts of the friction blocks, one side of each first cushion block is connected with the receiver, and the other side of each first cushion block is contacted with the inner wall of the outer sleeve.

During installation, upper portion chunk passes through the receiver and transmits the load to first cushion, and first cushion can realize the buffering of horizontal load and produce decurrent displacement simultaneously, to the vertical decurrent load of friction chunk transmission for friction chunk in the top layer damping unit takes place relative displacement with the sandbox and realizes the buffering of vertical load, and the sandbox can absorb partial energy and play the cushioning effect simultaneously, and with vertical load successive layer downward transmission, finally reduces the impact and reaches the shock attenuation effect. This spud leg coupling shock-absorbing structure passes through the cooperation of sandbox and friction group piece, with load transmission and conversion, simple structure, installation are convenient and the cost is lower.

Preferably, the friction block comprises a lower friction block and an upper friction block arranged on the lower friction block, the upper friction block and the lower friction block are wedge-shaped, and the lower friction block is arranged on the sand pool. Through the cooperation of last friction disc and lower friction disc, when receiving the load, the buffering and the transmission of load are realized to the relative displacement of going up friction disc and lower friction disc. And the volume of relevant parts of the friction block is reduced, so that the friction block is convenient to manufacture, transport and assemble, and the construction efficiency can be improved.

Specifically, the upper end face of the lower friction block is an inclined face, the lower end face of the upper friction block is an inclined face matched with the inclined face of the upper end of the lower friction block, and the inclined faces matched with the upper friction block and the lower friction block are friction faces.

In order to enable the shock absorption structure to be more stable, the upper friction block, the lower friction block, the friction block and the first cushion block are preferably fastened through binding ropes.

Specifically, the plurality of first cushion blocks are uniformly arranged along the circumferential direction of the outer sleeve. The first cushion blocks are uniformly arranged, so that uniform load transmission can be realized, and the damping structure is more stable.

Specifically, friction blocks in each layer of damping units are uniformly arranged around the central line of the outer sleeve. The friction blocks are uniformly arranged, so that uniform load transmission can be realized, and the damping structure is more stable.

Specifically, friction blocks in each layer of damping units are correspondingly arranged.

Specifically, the sandbox is of a cylindrical structure, and the diameter of the sandbox is smaller than that of the outer sleeve.

Preferably, the receiver is an inverted prismatic table structure. Compared with the conical structure of the pile leg coupler in the prior art, the manufacturing process can be simplified by arranging the receiver into the inverted prismatic table structure.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the pile leg coupling damping structure, the load is transferred and converted through the cooperation of the sandbox and the friction block, and the pile leg coupling damping structure is simple in structure, convenient to install and low in cost.

2. The friction block of the pile leg coupling damping structure has the advantages of reduced volume of relevant parts, convenient manufacture, transportation and assembly and improved construction efficiency.

3. The pile leg coupling damping structure can realize uniform load transmission, so that the damping structure is more stable.

Drawings

FIG. 1 is a schematic view of a leg coupling shock absorbing structure according to the present utility model;

FIG. 2 is a top view of the leg coupling structure of FIG. 1;

fig. 3 is a schematic structural view of the pile leg coupling structure in fig. 1 in an operating state.

In the drawings

1-upper block spud leg; a 2-receiver; 3-a shock absorbing unit; 31-friction block; 311-upper friction block; 312-lower friction block; 32-sandboxes; 4-a first cushion block; 5-binding ropes; 6-an outer sleeve; 7-backing.

Detailed Description

The utility model will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. For convenience of description, the words "upper", "lower", "left" and "right" are used hereinafter to denote only the directions corresponding to the upper, lower, left, and right directions of the drawings, and do not limit the structure.

As shown in fig. 1 and 2, the leg coupling structure of the present example includes a receiver 2 and an outer sleeve 6, a shock absorbing device is disposed in the outer sleeve 6, and the receiver 2 is disposed on top of the shock absorbing device. The damping device comprises four layers of damping units 3 arranged from bottom to top along the height direction of the outer sleeve 6, wherein each layer of damping units 3 comprises a sandbox 32 and four friction blocks 31 arranged on the sandbox 32. The bottom of the damping unit 3 is provided with a supporting bottom 7, and the supporting bottom 7 is connected with the inner wall of the outer sleeve 6. Four first cushion blocks 4 are arranged on the top layer of the shock absorption unit 3 and are respectively and correspondingly arranged on the upper parts of the friction blocks 31, one side of each first cushion block 4 is connected with the corresponding receiver 2, and the other side of each first cushion block 4 is contacted with the inner wall of the outer sleeve 6. The four first cushion blocks 4 are uniformly arranged along the circumferential direction of the outer sleeve 6, and the four friction blocks 31 in each layer of the shock absorbing unit 3 are uniformly arranged around the central line of the outer sleeve 6 and are correspondingly arranged. The sandbox 32 is of cylindrical configuration, the diameter of which matches the diameter of the outer sleeve 6. The receiver 2 is in an inverted eight-sided mesa structure. The friction block 31 comprises a lower friction block 312 and an upper friction block 311 arranged on the lower friction block 312, the upper friction block 311 and the lower friction block 312 are wedge-shaped, and the lower friction block 312 is arranged on the sandbox 32. The upper end face of the lower friction block 312 is an inclined face, the lower end face of the upper friction block 311 is an inclined face matched with the inclined face of the upper end of the lower friction block 312, and the inclined faces matched with the upper friction block 311 and the lower friction block 312 are friction faces. The upper friction block 311, the lower friction block 312, the friction block 31 and the first cushion block 4 are all fastened through binding ropes 5. The outer sleeve 8 and the backing 9 are both preserved by paint.

As shown in fig. 3, in use, the coupling structure is welded to the jacket leg in advance, and the outer sleeve 8 is made of the same diameter as the jacket leg and is butt welded to the jacket leg. The semi-submersible vessel transports the upper block to float and support to the jacket directly over, and in the process that the upper block spud leg 1 contacts with the receiver 2 and begins to transfer gradually the load, the first cushion block 4 receives the horizontal load and the vertical load transmitted by the receiver 2, and generates downward displacement to transmit the vertical downward load to the upper friction block 311 while bearing the buffer in the horizontal direction, the tying rope 5 is broken, the upper friction block 311 generates relative displacement to the lower friction block 312 and transmits the load to the lower layer gradually, and the sandbox 32 absorbs part of energy to play a role of buffering. When the upper modular spud leg 1 is in contact with the outer sleeve 6, the force is transferred to the jacket to complete the entire buffer unloading process.

The foregoing examples are set forth in order to provide a more thorough description of the present utility model, and are not intended to limit the scope of the utility model, since modifications of the present utility model, in which equivalents thereof will occur to persons skilled in the art upon reading the present utility model, are intended to fall within the scope of the utility model as defined by the appended claims.

Claims

1. Pile leg coupling damping structure, including receiver (2) and outer sleeve (6), its characterized in that: a damping device is arranged in the outer sleeve (6), and the receiver (2) is arranged at the top of the damping device;

the damping device comprises a plurality of layers of damping units (3) which are arranged from bottom to top along the height direction of the outer sleeve (6), wherein each layer of damping units (3) comprises a sandbox (32) and a plurality of friction blocks (31) arranged on the sandbox (32);

the bottom of the damping unit (3) at the bottom layer is provided with a supporting bottom (7), and the supporting bottom (7) is connected with the inner wall of the outer sleeve (6);

the top layer is provided with a plurality of first cushion blocks (4) which are respectively and correspondingly arranged on the upper parts of the friction blocks (31), one side of each first cushion block (4) is connected with the receiver (2), and the other side of each first cushion block is contacted with the inner wall of the outer sleeve (6).

2. The leg coupling shock absorbing structure according to claim 1, wherein: the friction block (31) comprises a lower friction block (312) and an upper friction block (311) arranged on the lower friction block (312), the upper friction block (311) and the lower friction block (312) are wedge-shaped, and the lower friction block (312) is arranged on the sandbox (32).

3. The leg coupling shock absorbing structure according to claim 2, wherein: the upper end face of the lower friction block (312) is an inclined face, the lower end face of the upper friction block (311) is an inclined face matched with the inclined face of the upper end of the lower friction block (312), and the inclined faces matched with the upper friction block (311) and the lower friction block (312) are friction faces.

4. The leg coupling shock absorbing structure according to claim 2, wherein: the upper friction block (311) and the lower friction block (312), and the friction block (31) and the first cushion block (4) are fastened through binding ropes (5).

5. The leg coupling shock absorbing structure according to claim 1, wherein: the plurality of first cushion blocks (4) are uniformly arranged along the circumferential direction of the outer sleeve (6).

6. The leg coupling shock absorbing structure according to claim 1, wherein: the friction blocks (31) in each layer of the damping units (3) are uniformly arranged around the central line of the outer sleeve (6).

7. The leg coupling shock absorbing structure according to claim 1, wherein: the friction blocks (31) in each layer of the damping units (3) are correspondingly arranged.

8. The leg coupling shock absorbing structure according to claim 1, wherein: the sandbox (32) is of a cylindrical structure, and the diameter of the sandbox is smaller than that of the outer sleeve (6).

9. The leg coupling shock absorbing structure according to any one of claims 1 to 8, wherein: the receiver (2) is of an inverted prismatic table structure.