Self-balancing variable attitude recoverable anchoring device anchoring and retrieving mechanism

Abstract

The application discloses a self-balancing variable-attitude recyclable anchoring device anchoring and withdrawing mechanism and belongs to the technical field of marine engineering anchoring equipment. The self-anchoring support is a hollow cylindrical structure, a plurality of strip-shaped openings extending in the axial direction are arranged in the circumferential direction of the side wall of the self-anchoring support, the self-anchoring motor is fixedly connected to the self-anchoring support in the axial direction, the transmission screw rod is fixedly connected to the rotor of the self-anchoring motor and extends into the self-anchoring support, the self-anchoring plunger is threadedly connected with the transmission screw rod, a plurality of spherical guide limiting parts are arranged on the self-anchoring plunger in the radial direction of the self-anchoring plunger, the spherical guide limiting parts are respectively in limiting sliding fit with guide grooves on the self-anchoring part units, the self-anchoring part units are arranged in the strip-shaped openings, the lower ends of the self-anchoring part units are hingedly connected to the lower end of the self-anchoring support, and the self-anchoring part units are used for unfolding outward and forming interaction with the surrounding soil after the anchoring device is drilled into the target soil layer.

Description

Technical Field

[0001] This invention belongs to the field of marine engineering anchoring equipment technology, and specifically relates to a self-balancing, variable attitude, and retrievable anchoring device. Background Technology

[0002] With the increasing development of floating offshore wind power, deep-sea oil and gas development, and marine energy equipment in the deep sea, floating platforms face higher demands on the bearing capacity, installation efficiency, service stability, and reusability of their anchoring foundations. Existing deep-sea anchoring devices typically rely on towing, suction, or gravity sinking to reach the seabed, forming anchoring force through the interaction of the anchor body, anchor plate, or deployable components with the soil. While these devices can meet mooring requirements under certain conditions, in complex marine environments, the coupling effects of wind, waves, and currents cause the direction of force on the mooring cables to constantly change with the movement of the floating platform. This leads to changes in the load direction and working attitude of the anchoring device, potentially resulting in insufficient penetration stability, limited interaction range with the soil, inadequate anchoring bearing capacity, insufficient adaptability to different service attitudes, and significant resistance during anchoring and retrieval.

[0003] To meet the requirements of reliable anchoring of self-balancing, variable-attitude, retrievable anchoring devices after drilling into the target soil layer, improved bearing capacity during long-term service, and easy recovery and reuse after operation, an anchoring and retraction mechanism capable of active deployment and retraction is needed. During the anchoring phase, this mechanism needs to stably convert axial drive displacement into the synchronous outward movement of multiple self-anchoring units, enabling the self-anchoring units to form mechanical interlocking, lateral compression, or frictional action with the surrounding soil, thereby enhancing the anchoring bearing capacity of the anchoring device. During the retraction phase, it needs to drive the self-anchoring units to retract inward, reducing their contact area and resistance with the soil, thus lowering the anchoring resistance. Therefore, it is necessary to propose an anchoring and retraction mechanism for a self-balancing, variable-attitude, retrievable anchoring device to solve the above technical problems. Summary of the Invention

[0004] In view of the problems and shortcomings of the existing technology, the purpose of this invention is to provide a self-balancing, variable attitude, retrievable anchoring device with an anchoring and retrieval mechanism, which aims to improve the penetration stability, anchoring reliability, retrieval convenience and operational efficiency of the anchoring device, so as to meet the needs of deep-water mooring and floating marine engineering equipment for efficient, stable and reusable anchoring foundations.

[0005] An anchoring and retraction mechanism for a self-balancing, variable-attitude, retrievable anchoring device includes a self-anchoring support, a self-anchoring plunger, several self-anchoring fastener units, a self-anchoring motor, and a transmission screw. The self-anchoring support is a hollow cylindrical structure with several axially extending strip-shaped openings on its sidewalls. The self-anchoring motor is axially fixed to the self-anchoring support, and the transmission screw is fixed to the rotor of the self-anchoring motor and extends into the interior of the self-anchoring support. The self-anchoring plunger is threadedly connected to the transmission screw. Several spherical guide limiting parts are provided on the self-anchoring plunger along its radial direction. The spherical guide limiting parts are respectively limited and slidably engaged with the guide grooves on several self-anchoring unit. The self-anchoring unit is set in the strip-shaped openings, and its lower end is hinged to the lower end of the self-anchoring support. The self-anchoring unit is used to expand outward and interact with the surrounding soil after the anchoring device drills into the target soil layer.

[0006] Preferably, the self-anchoring unit is a slender strip-shaped component with an overall outer contour that approximates a leaf shape.

[0007] Preferably, the self-anchoring unit includes a main body extending along the length direction and fin-shaped wings symmetrically arranged on both sides of the main body. The guide groove is disposed on the main body and extends along its length direction. The guide groove has a keyhole-shaped structure that is narrow at the top and wide at the bottom.

[0008] Preferably, the guide groove on the main body is closed on the side that is hinged to the self-anchoring support.

[0009] Preferably, the fin-shaped wing surface includes a first wing surface and a second wing surface symmetrically arranged on both sides of the main body. The main body portion of the first wing surface and the second wing surface are both inclined surfaces arranged at 45° relative to the horizontal direction. The first wing surface and the second wing surface gradually narrow towards the free end and fit into the main body.

[0010] The beneficial effects of this invention are: After drilling into the target soil layer, the anchor unit expands outward to increase the interaction area between the anchoring device and the surrounding soil, and interacts with the soil to allow more soil to participate in bearing, thereby improving the anchoring bearing capacity and pull-out resistance. At the same time, the invention can be modularly added according to engineering needs to meet the adaptability to different anchoring force requirements and different soil conditions. When recycling is required, the present invention enables the self-anchoring unit to retract into the corresponding self-anchoring support, reducing its interaction with the surrounding soil, reducing anchoring resistance, and realizing the overall recycling and reuse of the anchoring device. Attached Figure Description

[0011] Figure 1 This is a cross-sectional schematic diagram of the present invention; Figure 2 This is a schematic diagram showing the connection between the self-anchoring plunger and the self-anchoring fastener unit. Figure 3 This is a three-dimensional schematic diagram of a self-anchoring fastener unit; Figure 4This is a partial three-dimensional schematic diagram of the guide groove being set on the self-anchoring fastener unit; In the picture: 1: Self-anchoring support; 2: Self-anchoring plunger; 3: Self-anchoring fastener unit; 4: Self-anchoring motor; 5: Drive screw. Detailed Implementation

[0012] Please see Figures 1 to 4 An anchoring and retraction mechanism for a self-balancing, variable-posture, retrievable anchoring device includes a self-anchoring support 1, a self-anchoring plunger 2, several self-anchoring fastener units 3, a self-anchoring motor 4, and a transmission screw 5. The self-anchoring support 1 is a hollow cylindrical structure with several (six in this invention) axially extending strip-shaped openings on its side walls. The self-anchoring motor 4 is axially fixed to the self-anchoring support 1. The transmission screw 5 is fixed to the rotor of the self-anchoring motor 4 and extends into the interior of the self-anchoring support 1. The self-anchoring plunger 2 is threadedly connected to the transmission screw 5. Several (six in this invention) spherical guide limiting parts are provided on the self-anchoring plunger 2 in its radial direction. The spherical guide limiting parts are respectively limited and slidably engaged with the guide grooves on several self-anchoring fastener units 3. The self-anchoring fastener units 3 are all set in the strip-shaped openings, and their lower ends are hinged to the lower end of the self-anchoring support 1. The self-anchoring fastener unit 3 is a slender strip-shaped component with an overall outer contour that is approximately leaf-shaped. The self-anchoring fastener unit 3 includes a main body extending in the length direction and fin-shaped wings symmetrically arranged on both sides of the main body. Specifically, the guide groove is set on the main body and extends along its length. The guide groove has a keyhole-shaped structure that is narrower at the top and wider at the bottom. The guide groove on the main body is closed on the side that is hinged to the self-anchoring support 1 to prevent the spherical guide limiting part from detaching from the guide groove. The fin-shaped wing surface includes a first wing surface and a second wing surface symmetrically arranged on both sides of the main body. The main body parts of the first wing surface and the second wing surface are inclined surfaces arranged at 45° relative to the horizontal direction. The first wing surface and the second wing surface gradually narrow towards the free end and fit into the main body. The self-anchoring motor 4 drives the transmission screw 5 to rotate. When the self-anchoring plunger 2 moves axially, the spherical guide limit part pushes or pulls several self-anchoring fastener units 3 to unfold or retract relative to the self-anchoring support 1.

[0013] Working principle and process of this invention: After drilling is completed, the self-anchoring motor 4 starts and drives the transmission screw 5 to rotate. The self-anchoring plunger 2 is threadedly connected to the transmission screw 5. Because the self-anchoring support 1 provides circumferential limiting for the self-anchoring plunger 2, the self-anchoring plunger 2 cannot rotate with the transmission screw 5, but can only move axially along the transmission screw 5 under the action of threaded transmission. During the axial movement of the self-anchoring plunger 2, the spherical guide limiting part set on the self-anchoring plunger 2 moves along the guide groove on the self-anchoring unit 3. The guide groove is used to guide the movement direction of the spherical guide limiting part. The self-anchoring plunger 2 is guided and limited so that its axial displacement can be stably transmitted to several self-anchoring units 3. When the transmission screw 5 rotates in the first direction, the self-anchoring plunger 2 moves axially in the set direction and pushes several self-anchoring units 3 to unfold outward relative to the self-anchoring support 1 through the spherical guide and limiting part. After unfolding, the self-anchoring units 3 are inserted into or pressed against the surrounding soil layer, forming mechanical interlocking, lateral compression or friction with the soil layer, thereby increasing the contact and constraint with the soil layer and improving the holding capacity and pull-out resistance of the anchoring device. When the anchoring device needs to be retrieved, the self-anchoring motor 4 can drive the transmission screw 5 to rotate in the opposite direction, causing the self-anchoring plunger 2 to move axially in the opposite direction. At this time, the spherical guide limit part pulls several self-anchoring unit 3 to retract relative to the self-anchoring support 1, so that the self-anchoring unit 3 gradually detaches from the soil layer or reduces the supporting effect on the soil layer, thereby reducing the retrieval resistance and facilitating the retrieval of the anchoring device from the soil layer.

Claims

1. A self-balancing, variable-attitude, retrievable anchoring device with an anchoring and retraction mechanism, characterized in that: It includes a self-anchoring support (1), a self-anchoring plunger (2), several self-anchoring fastener units (3), a self-anchoring motor (4), and a transmission screw (5). The self-anchoring support (1) is a hollow cylindrical structure with several axially extending strip openings on its side wall. The self-anchoring motor (4) is axially fixed to the self-anchoring support (1). The transmission screw (5) is fixed to the rotor of the self-anchoring motor (4) and extends into the self-anchoring support (1). The self-anchoring plunger (2) is threadedly connected to the transmission screw (5). Several spherical guide limiting parts are provided on the self-anchoring plunger (2) along its radial direction. The spherical guide limiting parts are respectively limited and slidably matched with the guide grooves on several self-anchoring fastener units (3). The self-anchoring fastener units (3) are all set in the strip openings, and their lower ends are all hinged to the lower end of the self-anchoring support (1).

2. The anchoring and retraction mechanism of the self-balancing, variable-attitude, retrievable anchoring device according to claim 1, characterized in that: The self-anchoring unit (3) is a slender strip component with an overall outer contour that is approximately leaf-shaped.

3. The anchoring and retraction mechanism of the self-balancing, variable-attitude, retrievable anchoring device according to claim 2, characterized in that: The self-anchoring unit (3) includes a main body extending along the length direction and fin-shaped wings symmetrically arranged on both sides of the main body. The guide groove is arranged on the main body and extends along its length direction. The guide groove has a keyhole-shaped structure that is narrow at the top and wide at the bottom.

4. The anchoring and retraction mechanism of the self-balancing variable attitude retrievable anchoring device according to claim 3, characterized in that: The guide groove on the main body is hinged to the self-anchored support (1) on one side, which is a closed opening.

5. The anchoring and retraction mechanism of a self-balancing, variable-attitude, retrievable anchoring device according to claim 3, characterized in that: The fin-shaped wing surface includes a first wing surface and a second wing surface symmetrically arranged on both sides of the main body. The main body parts of the first wing surface and the second wing surface are inclined surfaces arranged at 45° relative to the horizontal direction. The first wing surface and the second wing surface gradually narrow towards the free end and fit into the main body.

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