CN215948259U

CN215948259U - Deep sea gravity type apron anchor

Info

Publication number: CN215948259U
Application number: CN202122034406.XU
Authority: CN
Inventors: 周楠; 赵福臣; 李飒; 魏作水; 王朋飞; 张振川; 王晓飞; 刘鑫; 苟乐宇; 尹蒋松
Original assignee: Offshore Oil Engineering Co Ltd
Current assignee: Offshore Oil Engineering Co Ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-03-04
Anticipated expiration: 2031-08-26

Abstract

The utility model provides a deep-sea gravity type apron plate anchor which comprises a cross support, an apron plate, a ballast block, a balancing weight and a hanging bracket, wherein all parts are connected through welding seams. The anchoring base hydrostatic presses the skirt plate to the design depth by gravity rather than by negative pressure, which eliminates the need for complex suction devices for the suction anchor; in the bearing process, the apron board and the ballast weight can provide anti-sliding and anti-pulling forces at the same time, so that the anchoring efficiency of the anchoring foundation is greatly improved; the counterweight block is installed when the apron board anchor cannot be inserted to the designed depth, so that the apron board anchor is ensured to be inserted to the designed depth, meanwhile, the weight of the apron board is increased, and the bearing capacity of the foundation is improved; the height of the cross brace is only about 1/3 of the height of the apron, which not only saves material, but also reduces the penetration resistance, and provides guarantee for the gravity type apron anchor to penetrate to the designed depth. The design of gallows has made things convenient for anchor foundation's manufacturing, has improved the security performance of hoist and mount.

Description

Deep sea gravity type apron anchor

Technical Field

The utility model relates to the technical field of deep sea temporary anchoring foundations, in particular to a deep sea gravity type apron anchor.

Background

The initial stage of laying the submarine pipeline by using the pipe-laying vessel requires fixing the marine pipe, and the common method is to lay an initial anchor or a jacket fastening method. Obviously, for deep sea semi-submersible platforms, the second approach is not applicable. The anchor can be used as a deep-sea pipe laying initial anchor in various types, including a grip anchor, a suction anchor, a pile anchor, a gravity anchor and the like. Where high holding power anchors are often used as the initial anchor due to the high weight ratio. However, in actual engineering, various manifolds are often concentrated near the central platform, and the installation condition that the holding anchor needs a large installation space cannot be met; meanwhile, the cost for installing, recovering the suction anchor and the pile anchor in deep sea is high, and the two types of anchor used as the initial anchor for temporary anchoring are obviously unreasonable in economic aspects. In this case, the gravity anchor is a good choice for the initial anchoring base due to its low cost and simple installation and recovery process.

However, the gravity anchor has a small grabbing-weight ratio and low anchoring efficiency; in addition, in the deep sea environment of south China sea, silty clay is mainly used within 10 meters, the surface soil body strength is low, and by adopting the anchoring mode, the designed anchoring foundation is large in size and high in weight, so that great difficulty is caused to transportation and installation. Therefore, there is a need to develop a new anchoring foundation with high anchoring efficiency and reasonable size and weight to solve the temporary anchoring problem in deep sea construction.

SUMMERY OF THE UTILITY MODEL

The present invention is intended to solve the above technical problems to some extent.

In order to solve the technical problems, the utility model provides a deep-sea gravity type apron plate anchor which is high in anchoring efficiency and simple in structure.

The utility model provides a deep-sea gravity type apron anchor which is characterized by being in a cubic box shape and comprising a plurality of apron plates, ballast blocks, cross supports and balancing weights, wherein the apron plates are arranged around the ballast blocks to form a box body with an opening at one end, the cross supports are fixed inside the box body, a plurality of through overflow holes are distributed in the ballast blocks, and the balancing weights can be placed on the ballast blocks.

Further, the ballast block is including skeleton and concrete slab, the skeleton is including the welding together be located outside frame and inside support frame, the frame with the mounting groove has between the support frame, concrete slab's outer fringe has the installation ear, concrete slab places in the mounting groove just the installation ear welds on the frame.

The ballast block is fixedly connected with the ballast block, a plurality of lifting lugs are distributed on the lifting frame, an internal reinforcing rib of the lifting frame corresponds to the support frame in shape, and a plurality of connecting points are arranged between the reinforcing rib and the support frame.

Further, the cross support is formed by welding two strip-shaped plates distributed along the direction of the apron board, the height of the cross support is 1/3 of the height of the apron board, and the cross support is fixed in the middle of the box body.

Further, the skirt anchor is cuboid, the length of the skirt anchor is 2 m-6 m, and the ratio of the length to the width of the skirt anchor is 2: 1-1: 1, the length-height ratio of the apron anchor is 2: 1.

furthermore, the lifting lugs are symmetrically distributed on the hanging bracket, and the ribs and the bones of the support frame are symmetrically distributed.

Further, the material of balancing weight is the concrete.

Further, the apron board and the cross support are made of steel, and the apron board and the cross support are coated with an anti-corrosion coating.

The utility model has the beneficial effects that: the utility model provides a deep-sea gravity type apron plate anchor which comprises a cross support, an apron plate, a ballast block, a balancing weight and a hanging bracket, wherein all parts are connected through welding seams. The anchoring base hydrostatic presses the skirt plate to the design depth by gravity rather than by negative pressure, which eliminates the need for complex suction devices for the suction anchor; in the bearing process, the apron board and the ballast weight can provide anti-sliding and anti-pulling forces at the same time, so that the anchoring efficiency of the anchoring foundation is greatly improved; the counterweight block is installed when the apron board anchor cannot be inserted to the designed depth, so that the apron board anchor is ensured to be inserted to the designed depth, meanwhile, the weight of the apron board is increased, and the bearing capacity of the foundation is improved; the height of the cross brace is only about 1/3 of the height of the apron, which not only saves material, but also reduces the penetration resistance, and provides guarantee for the gravity type apron anchor to penetrate to the designed depth. The design of gallows has made things convenient for anchor foundation's manufacturing, has improved the security performance of hoist and mount.

Drawings

FIG. 1 is an exploded view of a three-dimensional structure of a deep-sea gravity skirt anchor of the present invention;

FIG. 2 is a three-dimensional structural view of a deep sea gravity skirt anchor of the present invention;

in the figure, 1-cross support; 2-skirting board; 3-ballast block; 31-overflow holes; 32-a backbone; 33-a concrete slab; 4-a hanger; 41-lifting lugs; and 5-a balancing weight.

Detailed Description

The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.

According to the specific embodiment of the utility model, the utility model provides a deep-sea gravity type apron plate anchor, which is shown in fig. 1 and fig. 2, the apron plate anchor is in a cubic box shape and comprises a plurality of apron plates 2, ballast blocks 3, cross supports 1 and balancing weights 5, the apron plates 2 are enclosed and fixed on the periphery of the ballast blocks 3 to form a box body with an opening at one end, the cross supports 1 are fixed inside the box body, the ballast blocks 3 are distributed with a plurality of through overflow holes 31, and the balancing weights 5 can be placed on the pressure-carrying plate. The structure is simple. The anchoring base hydrostatic presses the skirt panels 2 to the design depth by gravity rather than by negative pressure, which eliminates the need for complex suction devices for the suction anchor;

according to the specific embodiment of the utility model, the utility model provides a deep sea gravity type apron anchor, which is shown in fig. 1 and 2, a ballast block 3 comprises a framework 32 and a concrete plate 33, the framework 32 comprises an outer framework and an inner supporting frame which are welded together, a mounting groove is formed between the framework and the supporting frame, a mounting lug is arranged at the outer edge of the concrete plate 33, the concrete plate 33 is placed in the mounting groove, and the mounting lug is welded on the framework. The ballast block 3, the ballast block 3 includes the skeleton 32 and concrete slab 33, set up the spillway hole 31 on the concrete slab 33, can get rid of the water or air in the box fast, offer and penetrate the skirt board 2 to the penetrating power of the design depth; meanwhile, the bottom of the anti-skid device is in contact with the soil body, and partial anti-skid force can be provided. The framework 32 can connect a plurality of concrete plates 33 together, so that the problem of low overall large-area pouring strength is avoided, the overall pouring time is saved, the structural strength is enhanced, the use of steel is reduced, and the cost is reduced.

According to the specific embodiment of the utility model, the utility model provides a deep-sea gravity type apron anchor, which is shown in fig. 1 and fig. 2, and further comprises a hanger 4, wherein the hanger 4 is fixedly connected with a ballast block 3, a plurality of lifting lugs 41 are distributed on the hanger 4, an internal reinforcing rib of the hanger 4 corresponds to the shape of a support frame, and a plurality of connecting points are arranged between the reinforcing rib and the support frame. The provision of a plurality of lifting lugs 41 may facilitate the installation and recovery of the skirt panel anchorage below. And the hanger 4 is connected with a plurality of positions of the support frame of the ballast block 3, so that the connection is more reliable.

According to the specific embodiment of the utility model, the deep-sea gravity type apron anchor is provided, as shown in fig. 1 and fig. 2, a cross support 1 is formed by welding two strip-shaped plates arranged along the direction of an apron board 2, the height of the cross support 1 is 1/3 of the height of the apron board 2, and the cross support 1 is fixed in the middle of a box body. Furthermore, the lifting lugs 41 are symmetrically distributed on the hanger 4, and the ribs of the support frame are symmetrically distributed. Structural style is simple, both can guarantee that the structural strength of 2 foundations of skirtboard meets the demands, can reduce the penetration resistance simultaneously, reduces the risk that the skirtboard anchor can't sink to the design position.

According to an embodiment of the present invention, there is provided a deep-sea gravity skirt anchor, as shown in fig. 1 and 2, wherein the skirt anchor has a rectangular parallelepiped shape, the length of the skirt anchor is 2m to 6m, and the ratio of the length to the width of the skirt anchor is 2: 1-1: 1, the length-height ratio of the apron anchor is 2: 1. the size is small. The material of balancing weight 5 is concrete. The use of steel is reduced. Install when the unable penetration of skirtboard anchor to the design depth, the balancing weight 5 can guarantee that the skirtboard anchor penetrates to the design depth, increases skirtboard 2's weight simultaneously, improves the bearing capacity on basis.

According to the specific embodiment of the utility model, the utility model provides a deep-sea gravity type apron anchor which is shown in fig. 1 and 2, wherein the apron 2 and the cross supports 1 are made of steel, and the apron 2 and the cross supports 1 are coated with an anti-corrosion coating. The seawater corrosion is reduced, and the device is convenient to recycle for multiple times.

The working process of the deep-sea gravity type apron anchor comprises the following steps:

the utility model relates to a deep-sea gravity type apron plate anchor, which is characterized in that firstly, a deep-water installation vessel lowers the apron plate anchor to the sea bottom through hoisting, the apron plate anchor is attached to the sea bottom and meets the requirement of determining the direction positioning of the gravity anchor, a lifting rope is loosened, and the apron plate anchor enters mud under the action of self weight; observing the anchoring mud entering state of the skirt plate through an underwater robot, and completing field installation if the skirt plate is completely filled with mud; if the water is not penetrated to the designed depth, the lower balancing weight assists in entering the mud. And after the apron board anchor is installed, subsequent installation operation of the marine pipe can be carried out.

The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the utility model is all within the protection scope of the utility model. The protection scope of the utility model is subject to the claims.

Claims

1. The utility model provides a deep sea gravity type apron anchor, its characterized in that, apron anchor is the cube box, including a plurality of skirtboards, ballast block, cross support and balancing weight, it is a plurality of the skirtboard encloses to establish to be fixed be one end open-ended box body around the ballast block, the cross support is fixed the inside of box body, the ballast block is last to be spread a plurality of spillway holes that link up, can place a plurality of balancing weights on the ballast block.

2. The deep sea gravity skirt anchor of claim 1, wherein the ballast block comprises a framework and a concrete slab, the framework comprises an outer frame and an inner support frame welded together, a mounting groove is formed between the frame and the support frame, a mounting lug is formed on the outer edge of the concrete slab, the concrete slab is placed in the mounting groove, and the mounting lug is welded to the frame.

3. The deep sea gravity type apron anchor of claim 2, further comprising a hanger, wherein the hanger is fixedly connected with the ballast block, a plurality of lifting lugs are arranged on the hanger, an internal reinforcing rib of the hanger corresponds to the shape of the support frame, and a plurality of connecting points are arranged between the reinforcing rib and the support frame.

4. The deep sea gravity type apron anchor of claim 1, wherein the cross support is formed by welding two strips arranged along the apron direction, the height of the cross support is 1/3 of the apron height, and the cross support is fixed in the middle of the box body.

5. The deep-sea gravity type apron anchor of claim 1, wherein the apron anchor is rectangular parallelepiped-shaped, the length of the apron anchor is 2 m-6 m, and the ratio of the length to the width of the apron anchor is 2: 1-1: 1, the length-height ratio of the apron anchor is 2: 1.

6. the deep-sea gravity apron anchor of claim 3, wherein the lifting lugs are symmetrically distributed on the hanger, and the supporting frame is symmetrically distributed in a rib and a bone.

7. The deep-sea gravity apron anchor of claim 1, wherein the weight is made of concrete.

8. The deep sea gravity skirt anchor according to claim 1, wherein the skirt and the cross brace are made of steel, and the skirt and the cross brace are coated with an anti-corrosion coating.