CN212267764U

CN212267764U - Novel torpedo anchor based on flat anchor stress form

Info

Publication number: CN212267764U
Application number: CN202022101384.XU
Authority: CN
Inventors: 赵维; 季启鹏; 安宝丰; 郭泗坦; 年廷凯
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-01-01
Anticipated expiration: 2030-09-23

Abstract

The utility model provides a novel fish thunder anchor based on flat anchor atress form. The torpedo anchor is mainly composed of an anchor body, a tail wing, a wedge-shaped anchor head for deflecting the anchor body, a mooring ring and the like. Wherein, the installation chain of torpedo anchor is connected at the top of anchor body, and the anchor chain links to each other with two mooring ring on the anchor body. The surface of the anchor body is flat, and the whole shape of the anchor body is close to that of a common torpedo anchor. The anchor head is a wedge-shaped body, and the anchor body deflects in the torpedo anchor injection process, so that the torpedo anchor curve injection is realized. In the actual use process, the anchor body is gradually perpendicular to the stress direction under the action of the anchor chain, the stress area of the fish-thunder anchor is enlarged, and the ultimate uplift bearing capacity is greatly improved.

Description

Novel torpedo anchor based on flat anchor stress form

Technical Field

The utility model belongs to the technical field of the anchor mooring of deep sea floating platform or deep water box with a net, a novel torpedo anchor based on torpedo anchor free fall penetrates the seabed to dull and stereotyped anchor atress form is related to.

Background

A torpedo anchor is one type of power driven penetration anchor, typically about 15m in length and weighing up to 130 tonnes. The torpedo anchor is named because the shape of the torpedo anchor is exactly like a torpedo, and comprises a cylindrical anchor body, a bullet-shaped or conical anchor head and anchor wings arranged at the tail of the anchor body. The anchor body is a thick-wall hollow steel pipe, concrete and waste metal are filled in the anchor body, the gravity center of the anchor body is adjusted while the whole weight of the anchor is increased, the gravity center is deviated to the anchor head, the direction stability during falling is enhanced, and the lower end part is in a conical shape and is convenient to penetrate into a seabed soil body. The fish-thunder anchor is simple in installation and operation, free-falling only by means of gravity and free-falling without any launching device, and theoretically suitable for any water depth. Firstly, the torpedo anchor is transported to a designated installation position by an anchor handling ship, the torpedo anchor is vertically suspended 20-75 meters away from the surface of the seabed, then the torpedo anchor is released to enable the torpedo anchor to freely fall, and after the torpedo anchor penetrates into the seabed, an installation chain is disconnected, and installation is completed.

The suction penetration type flat plate anchor is widely applied to the gulf of Mexico and the African sea area, and has the main advantages of low manufacturing cost, accurate positioning and simple construction. The planar shape of the flat anchor is rectangular, the flat anchor is vertically fixed in a suction type when being installed, and the caisson is penetrated to a preset depth under the action of self weight and negative pressure caused by pumping water. The caisson is pulled out after being separated from the flat anchor for future reuse. The flat anchor left in the clay seabed rotates under the traction of the anchor chain until the plate surface is nearly vertical to the anchor chain or the applied tension reaches the design value. In the process of tensioning the anchor chain to rotate the anchor plate, the suction penetration type flat plate anchor can move upwards to generate burial depth loss. The difference in height of the anchor plate center before and after rotation is defined as the final lost burial depth. Under seabed conditions where the strength generally increases in direct proportion to the depth, the loss of burial depth during rotation adjustment can result in a reduction in bearing capacity, which can be as high as 20%.

The anchor of flat board and torpedo respectively have advantage and disadvantage, if can realize organic combination between them, then can effectual increase anchor limit resistance to plucking bearing capacity, consequently the utility model discloses a novel torpedo anchor based on flat board anchor atress form has been proposed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel fish and thunder anchor based on flat anchor atress form improves greatly than traditional fish and thunder anchor limit resistance to plucking bearing capacity. The torpedo anchor is finally vertical to the stress direction by changing the static posture after penetrating into the seabed soil body, so that the stress area of the torpedo anchor is enlarged, and the ultimate uplift bearing capacity of the torpedo anchor is greatly improved.

The technical scheme of the utility model:

a novel torpedo anchor based on a flat plate anchor stress form is characterized in that a mooring ring 3 is added to an original torpedo anchor, and an anchor head is changed into a wedge-shaped anchor head 2; the wedge-shaped anchor head 2 is a residual structure after beveling of a cylinder, and the mooring ring 3 is installed on the anchor body on which one side of the long side is positioned after beveling.

The surface of the anchor body is flat, and the whole shape of the anchor body is close to that of a common torpedo anchor. When the novel fish-thunderbolt is used, the throwing angle needs to be adjusted according to the flow direction of seabed water flow so as to ensure that the posture of the anchor body when the anchor body is static can meet the expectation. Although the anchor body is usually not predictable when being static due to the influence of actual operation and the constraint of practical conditions, and the included angle between the anchor body and the horizontal plane cannot be predicted, once the anchor chain is pulled, the anchor body is gradually vertical to the stress direction, the stress area of the fish-fish anchor is increased, and the ultimate uplift bearing capacity is improved.

The utility model has the advantages that the use is simple, and is generally consistent with the application method of ordinary torpedo anchor, but the extreme resistance to plucking bearing capacity improves greatly.

The utility model discloses an effect and benefit: when the conventional torpedo anchor meets the condition of low strength of seabed soil body in the use process, the uplift bearing capacity of the conventional torpedo anchor can not meet the use requirement. This novel fish and thunder anchor can effectively improve limit resistance to plucking bearing capacity, through innovatively changing the anchor body and penetrating the form, has increased the resistance to plucking area greatly to the limit resistance to plucking that has improved the fish and thunder anchor bears, and novel fish and thunder anchor's input installation is simple and convenient.

Drawings

Fig. 1 is a top view of the present torpedo anchor.

Fig. 2 is a front view of the present torpedo anchor.

Figure 3 is a side view of the present torpedo anchor.

Fig. 4 is a schematic view of the torpedo anchor.

Fig. 5 illustrates the present torpedo anchor deployment.

In the figure: 1 anchor body, 2 wedge anchor head for deflecting anchor body, 3 mooring ring and 4 tail wing.

Detailed Description

The following describes the embodiments of the present invention with reference to the attached drawings:

a novel fish-thunder anchor based on a flat anchor stress form comprises an anchor body 1, a wedge-shaped anchor head 2 enabling the anchor body to deflect, a mooring ring 3, a tail wing 4 and the like. After the torpedo anchor is thrown into the sea, in the process of penetrating into the seabed soil body, the wedge-shaped anchor head 2 which enables the anchor body to deflect is under the action of the pressure of the deflection soil acting on the inclined plane of the anchor head, so that the torpedo anchor penetrates into the soil body along a curve, the penetration form of the anchor body is changed, after the anchor body is stabilized, the anchor chain connected with the mooring ring 3 is pulled to further adjust the form of the anchor body, the stress direction is vertical to the torpedo anchor, the stress area of the torpedo anchor is greatly increased, and the ultimate uplift resistance bearing capacity is improved.

Claims

1. A novel torpedo anchor based on a flat plate anchor stress form is characterized in that a mooring ring (3) is added to an original torpedo anchor, and an anchor head is changed into a wedge-shaped anchor head (2); the wedge-shaped anchor head (2) is a residual structure after beveling of a cylinder, and the mooring ring (3) is arranged on the anchor body on which one side of the long side is positioned after beveling.