A ship stabilizing device based on a ship bottom anchor

Abstract

The application discloses a ship stabilizing device based on a ship bottom anchor body and belongs to the technical field of ship stability control. The device comprises a spindle type metal anchor (1) and an anchor chain connecting structure (2). The spindle type metal anchor has three working states: in a sailing adhering state, the anchor body is tightly adhered to the ship bottom to serve as a counterweight to improve an initial metacentric height W; in a wave resistance suspension state, the anchor body is sunk to a preset depth in water, the metacentric height is improved to W' (W'>W) by moving the gravity center downward; and in a berthing fixing state, the anchor body contacts the water bottom, and the ship position is fixed by anchor chain tension (F' tension>F water flow force). The anchor chain connecting structure (2) comprises a hard connecting component (21) and / or a flexible anchor chain (22) and a guide hole (23), the hard connection directly transmits the gravity center change of the anchor body to the metacentric height of the ship body, and the flexible connection realizes Y-axis displacement compensation through the guide hole. The anchor body is reused as a dynamic counterweight, the traditional ship body design limit is broken, the wave resistance stability and the berthing stability are significantly improved, and the device is suitable for small ships, fishing vessels and sightseeing ships.

Description

Technical Field

[0001] This invention relates to the field of ship stability control technology, specifically to a ship stabilization device based on the bottom anchor, applicable to wave-resistant stability control of small vessels, rural vessels, and fishing auxiliary vessels (such as foam boats, plastic boats, and mixed-material boats). Background Technology

[0002] Traditional ships rely on a design where the center of buoyancy is higher than the center of gravity, using water displacement to generate a restoring moment to prevent capsizing. Anchors, as mooring tools, are typically independent of the hull's ballast system and are used solely to secure the ship's position. Existing technologies have the following drawbacks:

[0003] Single function of anchor: Small vessels generally use rope mooring, and the anchor is only used as a mooring tool, without making use of its weight value as a dynamic counterweight.

[0004] Hull structure limitations: Traditional hulls need to ensure watertightness, making it impossible to open holes in the center of the bottom to install anchor chain mechanisms, which means that the anchor cannot be integrated with the hull's centering adjustment system.

[0005] Technical issues: 1. Small vessels have insufficient center-of-gravity adjustment capabilities and poor wave resistance; 2. The anchor body and counterweight functions are separated, resulting in low utilization of hull space; 3. When moored, the anchor chain tension cannot effectively counteract the impact of water flow. Summary of the Invention

[0006] To address the aforementioned problems, this invention proposes a ship stabilization device based on the bottom anchor, which achieves a three-in-one function of adjusting the navigation center of gravity, enhancing wave-resistant suspension center of gravity, and fixing the ship at anchor through the dynamic combination of the anchor and the ship's counterweight.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A ship stabilization device based on a bottom anchor body includes: a spindle-shaped metal anchor (1): its hydrodynamic shape matches the bottom profile of the ship and has three working states: navigation fit state: the anchor body is close to the bottom of the ship and acts as a fixed counterweight to raise the initial center of gravity height W; wave-resistant suspension state: the anchor body sinks to a preset depth in the water and raises the center of gravity height to W' by shifting the center of gravity downward (satisfying W'>W); mooring fixed state: the anchor body contacts the bottom of the water and fixes the ship's position by the anchor chain tension (tension F' satisfies F'> water flow impact force F).

[0008] Anchor chain connection structure (2): Located at the center of the bottom of the ship, including: rigid connection component (21): rigidly connects the anchor body and the hull, so that the change of the anchor's center of gravity directly affects the height of the hull's center of gravity; flexible anchor chain (22) and guide hole (23): the guide hole passes through the bottom of the ship and is equipped with a sealing component, allowing the anchor chain to be compensated for displacement along the longitudinal axis Y direction of the ship.

[0009] Furthermore, the rigid connection component (21) is fixed to the center of the keel at the bottom of the ship by welding or bolting to ensure that the anchor body and the hull are rigidly linked.

[0010] Furthermore, the flexible anchor chain (22) is made of high-strength synthetic fiber cable with a breaking strength of not less than 10 times the weight of the anchor; the guide hole (23) is equipped with a rubber corrugated tube sealing structure, allowing the anchor chain to deflect within a range of ±15°.

[0011] Furthermore, the change in the center of gravity height satisfies the following: In the wave-resistant suspended state, W'=W+Δh·(m_anchor / m_ship), where Δh is the anchor sinking depth, m_anchor is the anchor mass, and m_ship is the total mass of the ship; In the moored and fixed state, W''=W, and the horizontal component of the anchor chain tension F'=k·ρ_water·v²·A (k is the resistance coefficient, and A is the cross-sectional area of ​​the hull).

[0012] Furthermore, the anchor chain connection structure (2) automatically adjusts the length of the anchor chain by means of a winch when the ship is moored, ensuring that F' ≥ 1.2F water flow force.

[0013] By adopting the aforementioned technical solution, the beneficial effects of the present invention are as follows: 1. Anchor body function reuse: Combining the anchor body with counterweights increases the center of gravity height during navigation, enhances stability during wave resistance, and fixes the ship's position when moored, increasing utilization rate by 200%; 2. Structural innovation: A guide hole is opened in the center of the hull and a dynamic sealing component is installed, breaking through the limitations of traditional hull design; 3. Optimized wave resistance performance: The critical angle for ship capsizing under wave resistance conditions is increased to 40° (compared to approximately 28° for traditional ships). 4. Enhanced mooring stability: The anchor chain tension automatically matches the water flow impact force, reducing mooring displacement by 60%, making it especially suitable for turbulent inland river areas. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a ship stabilization device based on a bottom anchor body according to the present invention;

[0015] Figure 2 This is a schematic diagram of the navigation and bonding state of the present invention;

[0016] Figure 3 This is a schematic diagram of the wave-resistant suspension state of the present invention;

[0017] Figure 4 This is a schematic diagram of the present invention in a fixed mooring state;

[0018] Figure 5 This is a schematic diagram of the anchor chain connection structure of the present invention;

[0019] Figure 6 This is a schematic diagram of the anchor chain connection structure of the present invention; Detailed Implementation

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0022] This embodiment provides a ship stabilization device based on the bottom anchor body, including a spindle-shaped metal anchor (1) and an anchor chain connection structure (2).

[0023] Structural configuration: The spindle-shaped metal anchor (1) has a shape that is hydrodynamically matched to the bottom profile of the ship, and its surface is treated with anti-corrosion.

[0024] The anchor chain connection structure (2) includes a rigid connection component (21), which is fixed to the center of the keel of the ship by welding or bolting, and rigidly connects the anchor body (1) to the hull.

[0025] Navigation fit state: The anchor body (1) is close to the bottom of the ship, serving as a fixed counterweight to raise the initial center of gravity height W;

[0026] Anti-wave suspension state: Release the anchor body (1) and sink it to the preset water depth, and raise the center height to W′ (satisfying W′>W);

[0027] Moored and fixed state: The anchor body (1) is in contact with the bottom of the water and the anchor chain tension is transmitted through the rigid connection component (21) to fix the ship's position.

[0028] The anchor chain connection structure (2) in this embodiment adopts a flexible anchor chain (22) and a guide hole (23).

[0029] Structural configuration: The guide hole (23) passes through the center of the bottom of the ship and is equipped with a rubber sealing component, which allows the flexible anchor chain (22) to be displaced along the longitudinal axis Y direction of the ship;

[0030] One end of the flexible anchor chain (22) is connected to the anchor body (1), and the other end is fixed to the hull compartment by a winch mechanism.

[0031] Anti-wave suspension state: When the anchor body (1) sinks, the flexible anchor chain (22) deflects in the guide hole (23), with a maximum deflection angle ≤15° and the center height satisfies W′>W;

[0032] Moored and fixed state: The anchor chain tension F′ is automatically adjusted by the winch to ensure that F′>F water force, thus suppressing hull displacement.

[0033] The rigid connection component (21) and the flexible anchor chain (22) are set in parallel, and the connection mode is selected by switching mechanism; the sealing component of the guide hole (23) adopts dynamic rubber bellows, which is compatible with the two connection methods.

[0034] Operating mode: During navigation: Hard connection is enabled, and the anchor (1) serves as a fixed counterweight;

[0035] When resisting waves: switch to flexible connection, the anchor body (1) sinks and allows the anchor chain to deflect to absorb the impact;

[0036] When moored: the flexible anchor chain (22) automatically extends and retracts to ensure that F′>1.2F water flow force.

[0037] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art will understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A ship stabilization device based on a bottom anchor, characterized in that, include: A spindle-shaped metal anchor (1) has a hydrodynamic shape that matches the bottom profile of the ship; an anchor chain connection structure (2) is located at the center of the bottom of the ship and is used to adjustably connect the spindle-shaped metal anchor (1) to the hull; wherein, the spindle-shaped metal anchor (1) has: In the navigation fit state, the anchor body is close to the bottom of the ship to play a counterweight role; Wave-resistant suspension state – the anchor body sinks to a preset depth in the water to lower the center of gravity; Moored and fixed position – The anchor body contacts the bottom of the water and the anchor chain pulls to fix the ship's position.

2. The ship stabilization device according to claim 1, characterized in that: The anchor chain connection structure (2) includes a rigid connection member (21) that rigidly connects the spindle-shaped metal anchor (1) to the bottom of the hull, so that the change in the center of gravity of the anchor directly affects the height of the hull's center of gravity.

3. The ship stabilization device according to claim 1, characterized in that: The anchor chain connection structure (2) includes a flexible anchor chain (22) and a guide hole (23). The guide hole (23) passes through the bottom of the hull and is equipped with a sealing component, allowing the anchor chain to be displaced along the longitudinal axis Y direction of the ship.

4. The ship stabilization device according to any one of claims 1-3, characterized in that: The change in the center of gravity height satisfies the following relationship: When in a wave-resistant suspension state: W′>W; When in a fixed, moored state: W′′=W; Where W is the initial center of gravity in the sailing and fitting state, W′ is the center of gravity in the wave-resistant and suspended state, and W′′ is the center of gravity in the moored and fixed state.

5. The ship stabilization device according to claim 3, characterized in that: The tension generated by the flexible anchor chain (22) when it is fixed at the bottom of the water satisfies: F′ tension > F water flow force; Wherein, F′ tension is the horizontal constraint force of the anchor chain on the hull, and F current force is the horizontal impact force of the current on the hull.

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