A water curtain unloading and wave-breaking device based on stern ramp energy collection

Abstract

The present invention relates to a water curtain type unloading and wave absorbing device based on stern ramp energy collection, comprising a plurality of water delivery pipelines arranged on the stern ramp, the water delivery pipelines comprising horizontal pipelines and vertical pipelines, an energy collection trumpet being provided at the bottom of the stern ramp, the bottom of the horizontal pipeline being connected to the vertical pipeline, the vertical pipeline being connected to the energy collection trumpet, the horizontal pipeline being provided with a single fan-shaped nozzle, and the vertical pipeline being provided with a watertight valve; the load on the stern ramp caused by the navigation of the ship and the movement of the ship under the action of waves can be partially released through the dredging channel and form a fan-shaped water curtain above the stern ramp, which can reduce the load on the stern ramp structure and transmission mechanism, improve the sea conditions and ship speed during normal operation of the stern ramp, and further expand the operation boundary of the deployment and recovery of floating vehicles and boats, the water curtain can cause wave energy dissipation, and reduce the diffraction of external waves into the semi-open water tank; at the same time, the unloading and wave absorbing device is integrated with the stern ramp, and the watertightness of the stern ramp is also guaranteed when the unloading and wave absorbing function is realized.

Description

Technical Field

[0001] The present invention relates to the field of ships and marine engineering, and in particular to a water curtain type unloading and wave-breaking device based on stern ramp energy collection. Background Art

[0002] Ships with semi-open water tanks can be used for the transportation of materials and equipment, and can be used for the navigation, deployment and recovery of floating vehicles and boats. They play an important role in marine engineering and island and reef development.

[0003] Ships with a semi-open water tank at the stern are often equipped with a watertight stern ramp structure at the ship's sealing plate. The stern ramp can be closed to keep it watertight with the hull, ensuring that there is no seawater in the tank for storage of materials and equipment and personnel activities; the stern ramp can be opened by a transmission mechanism at a certain angle downward relative to the horizontal plane, so that the semi-open water tank is connected to the external seawater, forming a semi-submerged water tank, which can be used for floating vehicles and boats to be delivered and recovered while the ship is sailing. When the stern ramp is opened at a certain angle downward relative to the horizontal plane, the coupling of multiple factors such as external wave diffraction, wave generation by ship motion and wave reflection superposition in the cabin will cause the wave environment in the semi-open water tank to be relatively severe, affecting the normal flooding in and out of floating vehicles and boats; at the same time, when the ship is sailing, the seawater fluid imposes a large load on the underwater stern ramp structure. The movement of the ship drives the stern ramp to hit the seawater, thereby increasing the load on the stern ramp structure and its transmission mechanism, putting high requirements on the strength of the stern ramp structure and the bearing capacity of the transmission structure, and limiting the ship speed, operating sea conditions and stern ramp opening angle for the deployment and recovery operations of floating vehicles and boats, which is not conducive to the safe and efficient deployment and recovery operations of floating boats and vehicles.

[0004] Currently, to ensure the safe navigation, deployment, and recovery of floating vehicles and boats via the stern ramp, the stern ramp is typically equipped with numerous reinforced structures to ensure strength. This results in a heavy weight and is opened and closed via a relatively stable hydraulic transmission mechanism. This mechanism is protected from floating when the load exceeds the design limit, making it unsuitable for the entry and exit of floating vehicles and boats. Furthermore, semi-open water tanks often incorporate porous wave-damping devices on their side walls to dissipate waves. This solution is complex and has poor wave-damping effectiveness against waves in the center of the tank.

[0005] For the efficient delivery and recovery of floating vehicles and boats under high sea conditions, there is an urgent need for an integrated unloading and wave-breaking device that can unload and protect the stern ramp and has a good wave-breaking effect, so as to improve the operating boundaries of the navigation and recovery of floating vehicles and boats.

[0006] Among the previously disclosed related devices, there is no technical solution that arranges an array of energy collection horns on the bottom surface of the stern ramp and forms a wave-breaking water curtain through pipes and a single fan-shaped nozzle structure. Therefore, it is necessary to find a unloading and wave-breaking solution suitable for ships with stern ramps and semi-open water tanks, which can collect energy to unload the stern ramp for protection and convert it into a water curtain. This solution can ensure the safety of the stern ramp when the ship is sailing in high sea conditions, reduce waves in the cabin, reduce the risk of floating vehicles and boats entering and exiting, and expand the operational boundaries of ships with semi-open water tanks at the stern for the deployment and recovery of floating vehicles and boats. Summary of the Invention

[0007] In view of the fact that the stern ramp structure in the existing technical solution has a large deadweight and adopts a hydraulic transmission mechanism for opening and closing operations, floating protection is performed when the load of the hydraulic transmission mechanism exceeds the design upper limit. At this time, the operating conditions for deploying and recovering floating vehicles and boats are not met, and it is greatly limited by the ship speed and operating sea conditions, and can only meet the operation requirements under low speed and low sea conditions; at the same time, the existing semi-open water tank wave absorption scheme mostly arranges porous devices on the side wall of the water tank for wave absorption, which has limited effect on reducing waves in the middle of the tank. Therefore, a water curtain unloading wave absorption device based on stern ramp energy collection is proposed.

[0008] The technical solution of the present invention is: a water curtain unloading and wave-breaking device based on stern springboard energy collection, including multiple water supply pipelines arranged on the stern springboard, an energy collection bell mouth is provided at the bottom of the stern springboard, the water supply pipeline includes a horizontal pipeline and a vertical pipeline, the bottom of the horizontal pipeline is connected to the vertical pipeline, the end of the vertical pipeline away from the horizontal pipeline is connected to the energy collection bell mouth, a single fan-shaped nozzle is provided at the top of the horizontal pipeline, and a watertight valve is provided on the vertical pipeline.

[0009] Preferably, the energy collection horn is symmetrically arranged on the bottom surface of the stern ramp along the central axis of the long side of the stern ramp.

[0010] Preferably, the energy collection horn is arranged in an eight-shaped shape.

[0011] Preferably, the distance between the two symmetrical energy collection horns gradually decreases from the bow to the stern.

[0012] Preferably, the end of the energy collection bell mouth close to the stern is tangent to the bottom surface of the stern ramp, and the end of the energy collection bell mouth away from the stern has a certain angle with the bottom surface of the stern ramp.

[0013] Preferably, the horizontal pipeline is symmetrically arranged inside the stern ramp along the central axis of the long side of the stern ramp).

[0014] Preferably, the horizontal pipeline is arranged parallel to the long side of the stern ramp.

[0015] Preferably, an opening is provided at the top of the horizontal pipeline, and a single fan-shaped nozzle is provided at the opening.

[0016] Preferably, the top of the single-phase fan-shaped nozzle does not protrude from the upper surface of the stern ramp.

[0017] Preferably, a pit is provided on the upper surface of the stern ramp, and the watertight valve is arranged in the pit.

[0018] The beneficial effects of the present invention are as follows: when a ship with a semi-open water tank at the stern is used to retrieve floating vehicles and boats, the watertight valve is opened, the stern ramp is opened at a certain angle downward relative to the horizontal plane, and the stern ramp structure is immersed in water. When the ship is sailing, the seawater fluid is collected through the energy collection bell mouth and flows into the horizontal pipeline through the vertical pipeline and the watertight valve. Under the pressure caused by the navigation of the ship, the seawater fluid is sprayed upward through the unidirectional fan-shaped nozzle to form a fan-shaped water curtain. The water curtain can disrupt the movement of water particles, causing nonlinear phenomena such as wave breaking and turbulence, thereby causing wave energy dissipation and reducing external The diffraction of the boundary waves enters the semi-open water tank; at the same time, the movement of the ship under the action of waves will cause the stern ramp to hit the seawater. The pressure caused by this process will compress the seawater and spray it out through the single fan-shaped nozzle to form a water curtain; when the ship is sailing and the stern ramp hits the seawater, part of the seawater fluid is drained and dredged, and the load acting on the stern ramp and the transmission mechanism is reduced, thereby improving the sea conditions and ship speed during normal operation of the stern ramp, thereby expanding the operation boundary of the deployment and recovery of floating vehicles and boats; after the ship with a stern semi-open water tank completes the deployment and recovery operation, the watertight valve is closed to ensure the watertightness of the stern ramp. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of the stern ramp of the water curtain type unloading and wave breaking device based on stern ramp energy collection in the open state;

[0020] Figure 2 This is a partially enlarged schematic diagram of the water curtain type unloading and wave-breaking device based on stern ramp energy collection of the present invention with the stern ramp open;

[0021] Figure 3 This is a top view of the stern ramp of the water curtain type unloading and wave breaking device based on stern ramp energy collection in the open state;

[0022] Figure 4 for Figure 3 A partial enlarged view of part A

[0023] Figure 5 This is a plan view of the energy collection horn of the present invention.

[0024] In the figures, the component names corresponding to the reference numerals are as follows:

[0025] 1. Stern ramp; 11. Pit; 2. Energy collection bell; 3. Water supply pipeline; 31. Horizontal pipeline; 32. Vertical pipeline; 4. Single fan-shaped nozzle; 5. Watertight valve. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0027] refer to Figure 1 、 5 As shown, the present invention provides a water curtain type unloading and wave absorbing device based on stern ramp energy collection, comprising a plurality of energy collecting horns 2 arranged on the stern ramp 1, the stern ramp 1 is rectangular, the energy collecting horns 2 are symmetrically arranged on the bottom surface of the stern ramp 1 along the central axis of the long side of the stern ramp 1, the energy collecting horns 2 are arranged in an eight-shaped shape, and the distance between the two symmetrical energy collecting horns 2 gradually decreases from the bow to the stern, so as to avoid the wake field of the energy collecting horn 2 near the stern of the bow affecting the energy collecting horn 2 away from the stern, thereby affecting energy collection, and the end of the energy collecting horn 2 near the stern is in contact with the bottom surface of the stern ramp 1. The end of the energy collection bell mouth 2 away from the stern of the ship forms a certain angle with the bottom surface of the stern ramp 1. In this example, the angle is 30 degrees. Therefore, when the stern ramp 1 is opened, seawater fluid caused by the ship's navigation can easily enter the energy collection bell mouth 2 from the side close to the stern of the ship. After being reflected by the tilted structure away from the stern, the energy is concentrated in the energy collection bell mouth 2, thereby increasing the pressure in the water supply pipeline 3, thereby increasing the water curtain injection speed and the energy capture effect. It also takes into account energy collection in two main scenarios: the ship's navigation and the ship's movement under the action of waves. The energy collection bell mouth 2 is made of high-strength steel to meet the strength requirements of the stern ramp.

[0028] refer to Figure 2 、 3 As shown, it also includes multiple water pipelines 3 arranged in the stern ramp 1. The water pipeline 3 includes a horizontal pipeline 31 and a vertical pipeline 32, both of which are made of high-strength steel. The horizontal pipeline 31 is symmetrically arranged in the stern ramp 1 along the central axis of the long side of the stern ramp 1. It is integrated with the stern ramp 1 and formed in an integrated manner so as not to affect the entry and exit of floating vehicles and boats. Each horizontal pipeline 31 is arranged parallel to the long side of the stern ramp 1; the bottom of the horizontal pipeline 31 is connected to the vertical pipeline 32, and the end of the vertical pipeline 32 away from the horizontal pipeline 31 is connected to the energy collection bell mouth 2. The vertical pipeline 32 is integrated with the stern ramp and formed in an integrated manner to ensure the sealing of the connection between the stern ramp 1 and the vertical pipeline 32. The vertical pipeline 32 is connected between the energy collection bell mouth 2 and the horizontal pipeline 31. The energy collection bell mouth 1 collects the fluid and transports it to the horizontal pipeline 31 through the vertical pipeline 32 to achieve energy transfer;

[0029] refer to Figure 2 、 4 As shown, an opening is provided at the top of the horizontal pipe 31, and a one-way fan-shaped nozzle 4 is installed at the opening. The top of the one-way fan-shaped nozzle 4 does not protrude from the upper surface of the stern ramp 1. When the stern ramp 1 is opened at a certain angle relative to the horizontal plane, the one-way fan-shaped nozzle 4 faces the direction of the diffracted waves at a certain angle. The one-way fan-shaped nozzle 4 can spray a fan-shaped high-speed water flow. The fan-shaped high-speed water flow can cover the width of the ship, disrupt the trajectory of water particles, and cause nonlinear phenomena such as wave breaking and turbulence, thereby causing wave energy dissipation and preventing wave diffraction from entering the semi-open water tank.

[0030] The horizontal pipeline 31 is provided with connection openings only at the installation location of the single-way fan-shaped nozzle 4 and at the connection location with the vertical pipeline 32, and the rest of the locations are sealed;

[0031] The vertical pipeline 32 is provided with a watertight valve 5, which is located near the single-way fan-shaped nozzle 4. A pit 11 is provided on the upper surface of the stern ramp 1. The watertight valve 5 is arranged in the pit 11. The watertight valve 4 can complete the opening and closing action in the pit. When the watertight valve 5 is closed, it can cut off the channel between the energy collection bell mouth 2 and all the single-way fan-shaped nozzles 4 on the horizontal pipeline 31, thereby achieving water tightness of the stern ramp.

[0032] Its working principle and beneficial effects are as follows: when a ship with a semi-open water tank at the stern is carrying out the recovery of floating vehicles and boats, the watertight valve 5 is opened, the stern ramp 1 is opened at a certain angle downward relative to the horizontal plane, and the stern ramp 1 structure is immersed in water. When the ship is sailing, the seawater fluid is collected by the energy collection bell mouth 1 and flows into the horizontal pipe 31 through the vertical pipe 32 and the watertight valve 5. Under the pressure caused by the navigation of the ship, the seawater fluid is sprayed upward through the unidirectional fan-shaped nozzle 4 to form a fan-shaped water curtain. The water curtain can disrupt the movement of water particles, causing nonlinear phenomena such as wave breaking and turbulence, thereby causing wave energy dissipation and reducing external The diffraction of the boundary waves enters the semi-open water tank; at the same time, the movement of the ship under the action of the waves will cause the stern ramp 1 to hit the seawater, and the pressure caused by this process will compress the seawater and spray it out through the unidirectional fan-shaped nozzle 4 to form a water curtain; when the ship is sailing and the stern ramp 1 hits the seawater, part of the seawater fluid is drained and dredged, and the load acting on the stern ramp 1 and the transmission mechanism is reduced, thereby improving the sea conditions and ship speed during normal operation of the stern ramp 1, thereby expanding the operation boundary of the deployment and recovery of floating vehicles and boats; after the ship with the stern semi-open water tank completes the deployment and recovery operation, the watertight valve 5 is closed to ensure the watertightness of the stern ramp 1.

[0033] It should be noted that the orientations or positional relationships indicated by the above-mentioned terms "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. The terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. "Multiple" means two or more. "Installation", "connected", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form or substance. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the scope of protection of the present invention. Any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the spirit and scope of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A water curtain type unloading and wave breaking device based on stern ramp energy collection, characterized in that: The invention comprises a plurality of water delivery pipelines (3) arranged on a stern ramp (1), an energy collection bell mouth (2) being provided at the bottom of the stern ramp (1), the water delivery pipeline (3) comprising a horizontal pipeline (31) and a vertical pipeline (32), the bottom of the horizontal pipeline (31) being connected to the vertical pipeline (32), one end of the vertical pipeline (32) being away from the horizontal pipeline (31) being connected to the energy collection bell mouth (2), a single fan-shaped nozzle (4) being provided at the top of the horizontal pipeline (31), and a watertight valve (5) being provided on the vertical pipeline (32); The energy collection horn (2) is symmetrically arranged on the bottom surface of the stern ramp (1) along the central axis of the long side of the stern ramp (1); The energy collection horn (2) is arranged in an eight-shaped shape; The distance between the two symmetrical energy collection horns (2) gradually decreases from the bow to the stern; The end of the energy collection bell mouth (2) close to the stern is tangent to the bottom surface of the stern ramp (1), and the end of the energy collection bell mouth (2) away from the stern is at a certain angle to the bottom surface of the stern ramp (1).

2. The water curtain type unloading and wave absorbing device based on stern ramp energy collection according to claim 1 is characterized in that: The horizontal pipeline (31) is symmetrically arranged inside the stern ramp (1) along the central axis of the long side of the stern ramp (1).

3. The water curtain type unloading and wave absorbing device based on stern ramp energy collection according to claim 2 is characterized in that: The horizontal pipeline (31) is arranged parallel to the long side of the stern ramp (1).

4. The water curtain type unloading and wave absorbing device based on stern ramp energy collection according to claim 1 is characterized in that: An opening is provided at the top of the horizontal pipeline (31), and a single fan-shaped nozzle (4) is provided at the opening.

5. The water curtain type unloading and wave absorbing device based on stern ramp energy collection according to claim 4 is characterized in that: The top of the single-direction fan-shaped nozzle (4) does not protrude from the upper surface of the stern ramp (1).

6. The water curtain type unloading and wave absorbing device based on stern ramp energy collection according to claim 1 is characterized in that: The upper surface of the stern ramp (1) is provided with a pit (11), and the watertight valve (5) is arranged in the pit (11).

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