CN219406807U - Filling type gravity anchor - Google Patents

Abstract

The utility model discloses a filling type gravity anchor, which comprises a gravity anchor main body. The gravity anchor main body includes a cylinder body. A plurality of anti-sinking plates are fixed on the bottom of the outer wall of the cylinder body. The filling type gravity anchor is arranged on the seabed near the coast, and the inside is filled with gravel, which directly contacts the seabed to generate frictional force against the mooring force. The bottom of the barrel of the stuffed gravity anchor is provided with multiple bollards to provide mooring points for construction ships. Compared with the traditional gravity anchor, the filling gravity anchor has a simple structure and can be installed and dismantled by only the anchor boat in the shallow water near the shore where large crane ships cannot enter and in the restricted area of anchoring, which reduces construction costs and meets the requirements of providing mooring points and stable and reliable mooring forces for construction ships under shallow water conditions. The comprehensive economic benefits are more significant.

Description

A stuffed gravity anchor

technical field

The utility model relates to a filling type gravity anchor, in particular to a filling type gravity anchor which is used for mooring ships in shallow water near the shore and in the restricted area of anchoring.

Background technique

With the development of the national economy, the energy demand is increasing year by year, and the number of oil and gas pipelines in the ocean is increasing year by year. Construction ships in the ocean are limited in anchoring in these areas, and these pipelines need to be avoided when deploying anchors. Under such restrictions, it is sometimes difficult for traditional anchors with large holding power or Hall anchors to find anchor points that can provide sufficient holding power. For traditional gravity anchors, due to their heavy weight, it is generally necessary to use large cranes for construction operations. However, in shallow water areas where anchoring is limited, large cranes cannot anchor and stabilize the ship, and secondly, shallow water areas have insufficient draft. Therefore, traditional gravity anchors are not suitable for this area.

Utility model content

The purpose of this utility model is to provide a filling type gravity anchor, which is suitable for the shallow water near the shore and the restricted area of anchoring, avoiding the dependence on large lifting ships, thereby reducing the construction cost, providing mooring points for construction ships, and providing stable and reliable mooring force.

In order to achieve the above object, the utility model adopts the following technical solutions:

A filling type gravity anchor, the gravity anchor body includes a cylinder, a bollard and an anti-sinking plate;

The cylinder is a cylindrical steel structure with an open bottom and top, and a plurality of sets of bollards are evenly arranged along the circumferential direction at the bottom of the outer wall of the cylinder to provide mooring points for construction ships;

Multiple groups of anti-settling plates are evenly arranged along the circumferential direction at the bottom of the outer wall of the cylinder to improve the stability of the gravity anchorage and prevent uneven settlement. .

Preferably, the top of the anti-sinking plate is embedded in the outer wall of the cylinder to form a fixed part, and the bottom of the anti-sinking plate is exposed to increase the contact area between the gravity anchor and the seabed, thereby increasing the friction against the mooring force.

Preferably, the bollards are arranged at equal intervals along the circumferential direction of the barrel.

Preferably, the anti-settling plates are arranged at equal intervals along the circumferential direction of the cylinder.

As a preference, the interior of the cylinder is filled with gravel, which directly contacts the seabed and directly resists the mooring force.

Preferably, the surface of the gravity anchor main body is provided with an anti-corrosion coating and/or a built-in sacrificial anode, so that the gravity anchor main body meets the service life requirements in the marine environment.

Compared with the prior art, the beneficial technical effect of the utility model is:

1. Arrange the filled gravity anchor on the seabed in the shallow water area, and the construction ship is moored through the bollard. The filled gravity anchor relies on its own gravity minus the buoyancy of seawater to resist the upward component of the mooring force; the cylinder is filled with gravel, which is in direct contact with the seabed, and the gravity anchor plus gravel relies on its own gravity minus the buoyancy of seawater to generate friction to resist the horizontal component of the mooring force. Compared with the traditional gravity anchor, the filling gravity anchor has a simple structure and can be installed and dismantled by only the anchor boat in the shallow water anchoring restricted area where large crane ships cannot enter, which reduces construction costs and provides mooring points and stable and reliable mooring forces for construction ships under shallow water conditions.

2. Various anti-corrosion measures are adopted on the main body of the gravity anchor to significantly improve its anti-corrosion ability, so that the main body of the gravity anchor can meet the service life requirements in the marine environment.

3. Filled gravity anchors are arranged continuously at intervals along the route. When the ship advances along the route, it can be moored to different filled gravity anchors to meet the mooring requirements of construction ships.

To sum up, the utility model can provide mooring points and stable and reliable mooring forces for construction ships in shallow water near the shore and anchored in restricted areas without using a crane ship.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are some implementations of the utility model. For those of ordinary skill in the art, other accompanying drawings can also be obtained according to these drawings without paying creative work.

Fig. 1 is a structural schematic diagram of the filling type gravity anchor of the present invention.

Fig. 2 is a schematic diagram of sea transportation of the filled gravity anchor;

Fig. 3 is a schematic diagram of a filled gravity anchor tied buoyant bag floating in water;

Fig. 4 is a schematic diagram of the sea dragging of the filled gravity anchor;

Figure 5 is a diagram of the filled gravity anchor sinking to the seabed after releasing the floating bag;

Fig. 6 is a schematic diagram of gravel injected into the filling type gravity anchor;

Reference signs: 1. Gravity anchor main body; 2. Cylinder body; 3. Bollard; 4. Anti-sinking plate; 5. Mooring point.

Implementation

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and so on is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, or it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

Example

Referring to FIG. 1 , it is a filling type gravity anchor disclosed by the utility model, which includes a gravity anchor main body 1 , and the gravity anchor main body 1 includes a cylinder body 2 , a bollard 3 and an anti-sinking plate 4 . The cylinder body 2 is a cylindrical steel structure with an open bottom and top, and a plurality of groups of bollards 3 are evenly arranged on the bottom of the outer wall of the cylinder body 2 along the circumferential direction to provide mooring points for construction ships. Multiple groups of anti-settling plates 4 are evenly arranged along the circumferential direction at the bottom of the outer wall of the cylinder body 2 to improve the stability of the gravity anchor and prevent uneven settlement. The cylinder body 2 has a diameter of 8m, a wall thickness of 50mm, and a height of 3.5m. After including the bollard 2 and the anti-sinking plate 3, the weight of the gravity anchor main body 1 is 43 tons in the air and about 37 tons in the water. The internal volume of cylinder 1 is about 152m³, in which crushed stones are injected, and the density of crushed stones is considered as 1.7 tons/m³. The weight of crushed stones in the air is about 158 tons, the weight in water is about 97 tons, and the overall weight in water is about 134 tons. The friction coefficient in the horizontal direction is 0.3. A single filled gravity anchor can provide a horizontal mooring force of not less than 40 tons.

Referring to Fig. 2-Fig. 6, the sea installation process of the filled gravity anchor is reflected: first, the gravity anchor main body 1 is loaded on a barge at the wharf, and then transported to the construction site, and the anchor boat is used to drag the gravity anchor main body 1 from the inclined slideway provided at the stern of the barge into the water; then, the gravity anchor main body 1 enters the water and sinks to the seabed, and the divers tie the inflatable floating bag on the bollard 3. At the design position, the diver releases the floating bag, and the main body of the gravity anchor 1 sinks to the predetermined position; then, fill the body of the cylinder 2 with gravel, which directly contacts the seabed, and generates friction under the action of gravity to resist the horizontal force of the mooring.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still modify the technical solutions described in the foregoing embodiments, or carry out equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. A filling type gravity anchor, comprising a gravity anchor main body (1), characterized in that the gravity anchor main body (1) includes a cylinder (2), bollard (3), and anti-sinking plate (4); The cylinder (2) is a cylindrical steel structure with an open bottom and top, and a plurality of sets of bollards (3) are evenly arranged on the bottom of the outer wall of the cylinder (2) along the circumferential direction to provide mooring points (5) for construction ships; Multiple groups of anti-settling plates (4) are evenly arranged along the circumferential direction at the bottom of the outer wall of the cylinder (2) to improve the stability of the gravity-anchored bottom and prevent uneven settlement. 2. The filled gravity anchor according to claim 1, characterized in that: the bollard (3) adopts a cross structure, which can significantly increase the shear bearing capacity against the horizontal component of the mooring force. 3. A filling type gravity anchor according to claim 1, characterized in that: one end of the anti-settling plate (4) is embedded in the outer wall of the cylinder (2) to form a fixed part, and the other end of the anti-settling plate (4) is exposed to increase the contact area between the gravity anchor and the seabed, thereby increasing the frictional force against the mooring force. 4. The filling type gravity anchor according to claim 1, characterized in that: the bollards (3) are arranged at equal intervals along the circumferential direction of the cylinder (2). 5. The filling type gravity anchor according to claim 1, characterized in that: the anti-settling plates (4) are arranged at equal intervals along the circumferential direction of the cylinder (2). 6. The filled gravity anchor according to claim 1, characterized in that: the inside of the cylinder (2) is filled with gravel, and the gravel directly contacts the seabed and directly resists the mooring force. 7. The filled gravity anchor according to claim 1, characterized in that: the surface of the gravity anchor body (1) is provided with an anti-corrosion coating and/or a built-in sacrificial anode, so that the gravity anchor body (1) meets the service life requirements in the marine environment.