CN218431623U - A torpedo anchor with freely retractable anchor claws - Google Patents

Abstract

The utility model discloses a torpedo anchor with freely telescopic anchor claws, which comprises an anchor body, a transmission device inside the anchor body and a movable anchor claw, wherein the transmission device and the movable anchor claw are engaged with each other, and the transmission device includes a transmission wheel and a movable anchor claw. The transmission chain, the transmission wheel includes two gears and a sprocket located in the middle of the gears. The centers of the gears and the sprocket are located on the same line and rotate synchronously. The diameters of the gears on both sides are the same and larger than the middle sprocket. The occlusal connection forms a chain transmission, and the gears on both sides mesh with the movable anchor claws to form a gear transmission. The device can be recycled and reused while improving the pull-out resistance, so as to achieve the effect of "difficult to move the anchor, but easy to lift the anchor"; the operation is simple, the existing torpedo anchor is convenient to be refitted, and the cost is low.

Description

A torpedo anchor with freely retractable anchor claws

technical field

The utility model relates to a deep-sea mooring foundation, in particular to a torpedo anchor with freely retractable anchor claws.

Background technique

With the development of society and economy, my country's demand for oil and gas resources is increasing day by day. In order to meet the growing demand for oil and gas energy, the development of offshore oil and gas resources has gradually shifted from shallow sea to deep sea. Since the cost of fixed platforms increases sharply with the increase of operating water depth, it is generally only suitable for shallow seas, while floating platforms with relatively stronger applicability are mostly used in deep sea areas. The floating platform relies on its own buoyancy to support the weight of its upper part, and anchors the platform through the mooring system; the mooring system, as a component of the deep-sea floating structure, plays a vital role in its operation safety. Commonly used anchoring structures for floating platforms include suction anchors, drag anchors, normal bearing anchors, suction mounting plate anchors and dynamic mounting anchors. Among them, the torpedo anchor, as a kind of dynamic installation anchor, has the advantages of not needing various auxiliary devices, simple installation, short period, low economic cost, and less influence of installation cost with the increase of water depth compared with other anchor types. One of the most promising deep-sea anchor foundations.

At present, most people try to strengthen the bearing capacity of torpedo anchors by changing the physical structure, mainly including adding electric blades at the anchor head, adding hydraulic impactors in the anchor body, and conducting secondary penetration through negative Poisson’s ratio materials and internal anchor rods. The method of increasing the penetration depth and the method of increasing the contact area between the torpedo anchor and the soil such as setting a piercing device inside the anchor body, setting the tail fin to partially open and elongate the structure, etc. When the existing method relies on the pre-loaded electric energy equipment to achieve enhanced bearing capacity, because the marine environment is known to be complex, the implementation of electrical energy equipment in the ocean is subject to many restrictions. It is not conducive to recycling.

Utility model content

Purpose of the utility model: The purpose of this utility model is to provide a torpedo anchor with freely retractable anchor claws which can improve the bearing capacity of the torpedo anchor and can be recycled and reused.

Technical solution: A torpedo anchor with freely retractable flukes described in the utility model includes an anchor body, a transmission device inside the anchor body and a movable fluke, wherein the transmission device and the movable fluke are engaged with each other, and the transmission device It includes a transmission wheel and a transmission chain. The transmission wheel includes two gears and a sprocket located in the middle of the gears. The centers of the gears and the sprocket are located on the same line and rotate synchronously. The diameters of the gears on both sides are the same and larger than the middle sprocket. The middle chain The wheel and the transmission chain are engaged and connected to form a chain transmission, and the gears on both sides and the movable anchor claws are meshed with each other to form a gear transmission.

Preferably, the anchor body includes two semi-cylindrical cones, the inside of which is provided with a gear groove and a central shaft for installing the transmission wheel, and two chain grooves for placing the transmission chain are provided in the vertical direction, and the gear groove The bottom of the groove is provided with a fluke groove for placing movable flukes.

Preferably, the upper surface of the movable fluke is provided with sawtooth meshing with the sprockets on both sides of the transmission wheel, and each side of the sawtooth is provided with a protrusion to prevent slipping, which is inserted into both sides of the groove of the fluke.

Preferably, the movable fluke is arranged horizontally or obliquely upward.

Preferably, the upper end of the head of the movable fluke is provided with a barbed protruding structure.

Preferably, a main anchor chain is also included, and the main anchor chain is arranged at the tail of the anchor body.

Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. After penetrating into the seabed, the movable fluke is stretched out, which improves the vertical pull-out resistance and horizontal tensile strength; the movable fluke is retracted when the anchor is lifted , easy to pull the anchor, recycle and reuse, and achieve the effect of "difficult to move the anchor, easy to lift the anchor"; 2, no need to use electric energy equipment, easy to operate; 3, easy to refit the existing torpedo anchor, and low cost.

Description of drawings

Fig. 1 is a structural sectional view of the utility model;

Figure 2 is a sectional view of the anchor body structure of the utility model;

Fig. 3 is a cross-sectional view of the movable anchor fluke of the present invention when contracted;

Fig. 4 is a cross-sectional view when the movable anchor fluke of the present invention is stretched out;

Fig. 5 is a structural diagram of the transmission device of the present invention;

Fig. 6 is a structural diagram of the movable anchor fluke of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the technical scheme of the utility model is further described.

As shown in Fig. 1 and Fig. 3-4, a torpedo anchor with freely retractable fluke described in the utility model includes an anchor body 1, a transmission device 2, a movable fluke 3 and a main anchor chain 4, and a transmission device 2 Including the transmission wheel 21 and the transmission chain 22, the transmission device and the movable anchor fluke 3 are located inside the anchor body 1, and the main anchor chain 4 is arranged at the tail of the anchor body.

As shown in Figure 2, the anchor body 1 includes two semi-cylindrical vertebral bodies, with a gear groove 5 and a central shaft 6 inside, which are used to install the transmission wheel 21; two anchor chain grooves 7 are arranged in the vertical direction , used to place the transmission chain 22; the bottom of the gear groove 5 is provided with a fluke groove 8, which is used to place the movable fluke 3.

As shown in Figure 3-4, the transmission wheel 21 is welded by two gears and a sprocket located in the middle of the gears, wherein the diameters of the gears on both sides are the same and larger than the diameter of the middle sprocket, and the centers of the gears and the sprocket are on the same straight line And can be installed on the central shaft in the anchor body 1, synchronously rotate in the gear groove.

As shown in FIG. 5 , the transmission chain 22 includes a transmission part and a chain part. The transmission part is located in the middle section of the transmission chain and can be meshed with the intermediate sprocket in the transmission wheel to form a chain transmission. As shown in Figure 6, the upper surface of the movable fluke 3 is provided with sawtooth meshing with the gears on both sides of the transmission wheel 21, and each side of the sawtooth is provided with an anti-protrusion, which is inserted into both sides of the fluke groove to avoid movement. The fluke slipped out when extended. The movable fluke 3 is arranged horizontally or obliquely upwards, and the head is provided with a barb-like convex structure at the upper end, which is convenient for increasing the pullout resistance after being inserted into the seabed soil. Movable anchor fluke 3 forms gear transmission with both sides gears in the drive wheel.

The operation of the movable anchor fluke in the deep-sea anchor body is by bidirectionally pulling the transmission chain fixed on the ship or offshore platform at both ends, driving the transmission wheel connected to the transmission chain to rotate through the chain transmission, and then driving the movement connected to the transmission wheel through gear transmission The anchor fluke, so as to achieve the purpose of free expansion and contraction of the movable anchor fluke, can strengthen the pull-out resistance of the torpedo anchor and is easy to operate.

The using method of the present utility model comprises the steps:

(a) The torpedo anchor parts are shipped to the target sea area, and the middle section of the transmission chain 22 is fitted on the middle sprocket of the transmission wheel 21;

(b) Put the transmission device 2 and the movable fluke 3 into the corresponding grooves in the anchor body 1 and fix them, and then weld or rivet the two halves of the anchor body;

(c) Link the main anchor chain 4 and tighten it, then loosen the transmission chain 22 slightly, put the torpedo anchor vertically into the water, and send the main anchor chain and the transmission chain at the same time, so that the transmission chain will not be excessively affected during the falling process of the torpedo anchor. pressure, avoiding chain detachment and preventing damage to transmission device 2 at the same time;

(d) After the torpedo anchor penetrates into the seabed soil, the transmission chain is pulled counterclockwise, so that the movable anchor claw 3 is stretched out and inserted into the surrounding soil, and the installation is completed; as shown in Figure 4;

(e) When lifting the anchor, pull the transmission chain clockwise, so that the movable anchor fluke 3 is retracted, and then pull the main anchor chain to retract the torpedo anchor.

Claims (6)

1. The fish-thunder anchor with the freely telescopic fluke is characterized by comprising an anchor body (1), a transmission device (2) and a movable fluke (3), wherein the transmission device (2) and the movable fluke (3) are located inside the anchor body (1), the transmission device (2) is meshed with the movable fluke (3), the transmission device (2) comprises a transmission wheel (21) and a transmission chain (22), the transmission wheel (21) comprises two gears and a chain wheel located in the middle of the gears, the centers of the gears and the chain wheel are located on the same straight line and rotate synchronously, the diameters of the gears on two sides are the same and are larger than that of the middle chain wheel, the middle chain wheel is meshed with the transmission chain (22), and the gears on two sides are meshed with the movable fluke (3).

2. A fish-stone anchor with freely extendable and retractable flukes, according to claim 1, wherein the anchor body (1) comprises two semi-cylindrical cones, inside which there are provided a gear groove (5) for mounting a driving wheel (21) and a central shaft (6), there are two chain grooves (7) for receiving a driving chain (22) in the vertical direction, and the bottom of the gear groove (5) is provided with a fluke groove (8) for receiving a movable fluke (3).

3. A fish-stone anchor with a freely extending and retracting fluke according to claim 1, characterised in that the movable fluke (3) is provided on its upper surface with saw teeth engaging with sprockets on both sides in the driving wheel (21), and that the saw teeth are provided on both sides with a slip-preventing protrusion, which snap into the recesses (8) on both sides of the fluke.

4. A fish-stone anchor with freely telescoping flukes according to claim 1, characterized in that the movable fluke (3) is arranged horizontally or obliquely upwards.

5. A fish-and-thunder anchor with a freely telescopic fluke according to claim 1 or 4, characterised in that the head of the movable fluke (3) is provided with a barb-like protruding structure at its upper end.

6. A fish-stone anchor with a freely telescopic fluke according to claim 1, characterized in that it further comprises a main chain (4), said main chain (4) being arranged at the rear of the anchor body.

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