Water curtain type unloading wave absorbing device based on stern ramp energy collection

Abstract

The invention relates to a water curtain type unloading wave absorbing device based on stern ramp energy harvesting, which comprises a plurality of water conveying pipelines arranged on a stern ramp, the water conveying pipelines comprise horizontal pipelines and vertical pipelines, the bottom of the stern ramp is provided with an energy harvesting horn mouth, the bottoms of the horizontal pipelines are connected with the vertical pipelines, and the vertical pipelines are connected with the energy harvesting horn mouth. The horizontal pipeline is provided with a one-way fan-shaped nozzle, and the vertical pipeline is provided with a watertight valve; the stern ramp load caused by ship sailing and ship movement under the action of waves can be released through the dredging channel part, and a fan-shaped water curtain is formed above the stern ramp, so that the load borne by the stern ramp structure and a transmission mechanism can be reduced, and the sea condition and the ship navigational speed during normal operation of the stern ramp are improved; furthermore, the operation boundary of launching and recycling of the floating vehicle and the boat is expanded, the water curtain can cause wave energy dissipation, and external waves diffracted into the semi-open water tank are reduced; meanwhile, the unloading and wave absorbing device and the stern ramp are integrally designed, and the water tightness of the stern ramp is guaranteed while the unloading and wave absorbing functions are achieved.

Description

Technical Field

[0001] The 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 the fields of marine engineering and island and reef development.

[0003] Ships with a semi-open water tank at the stern often have a watertight stern ramp structure at the ship's sealing plate. The stern ramp can be closed to keep 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 during the navigation of the ship. When the stern ramp is opened at a certain angle downward relative to the horizontal plane, the coupling effect of multiple factors such as external wave diffraction, wave generation by ship movement 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, and the movement of the ship drives the stern ramp to strike the seawater, thereby increasing the load on the stern ramp structure and its transmission mechanism, which puts forward high requirements on the structural strength of the stern ramp and the bearing capacity of the transmission structure, and limits the ship speed, operating sea conditions and stern ramp opening angle for the deployment and recovery of floating vehicles and boats, which is not conducive to the safe and efficient deployment and recovery of floating boats and vehicles.

[0004] At present, in order to meet the requirements of safe navigation, delivery and recovery of floating vehicles and boats through the stern ramp, the stern ramp is generally equipped with more reinforced structures to ensure strength, resulting in a large weight of the stern ramp, and the opening and closing operations are carried out through a relatively stable hydraulic transmission mechanism. When the load of the hydraulic transmission mechanism exceeds the design upper limit, floating protection is performed, and the operating conditions for the entry and exit of floating vehicles and boats are not met. At the same time, a multi-hole wave-breaking device is often installed on the side wall of the semi-open water tank to break the waves. This solution has a complex structure and has a poor wave-breaking effect on the waves in the middle 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 boundary of the floating vehicle and boat navigation and recovery.

[0006] Among the related devices disclosed, there is no technical solution that arranges an array of energy collection trumpets on the bottom surface of the stern ramp and forms a wave-breaking water curtain through pipelines 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 unload and protect the stern ramps and convert them into water curtains, ensure the safety of opening 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 operating boundaries of ships with semi-open water tanks at the stern for the recovery of floating vehicles and boats. Summary of the invention

[0007] Aiming at the problem that the deadweight of the stern ramp structure in the existing technical scheme is large and a hydraulic transmission mechanism is used 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 the deployment and recovery of 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 operating needs under low speed and low sea conditions; at the same time, the existing semi-open water tank wave absorption schemes mostly arrange porous devices on the side walls of the water tank for wave absorption, which has limited effect on reducing the waves in the middle of the cabin. 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 type unloading and wave-breaking device based on stern springboard energy collection, comprising a plurality of water delivery pipelines arranged on the stern springboard, an energy collection bell mouth is arranged at the bottom of the stern springboard, the water delivery pipeline comprises a horizontal pipeline and a vertical pipeline, the bottom of the horizontal pipeline is connected to the vertical pipeline, one end of the vertical pipeline away from the horizontal pipeline is connected to the energy collection bell mouth, a single fan-shaped nozzle is arranged on the top of the horizontal pipeline, and a watertight valve is arranged 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, an end of the energy collection bell mouth close to the stern is tangent to the bottom surface of the stern ramp, and an 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 one-way fan-shaped nozzle does not protrude from the upper surface of the stern springboard.

[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 for the recovery of 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 single fan-shaped nozzle to form a fan-shaped water curtain. The water curtain can disturb 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, and 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; during the ship's navigation and the stern ramp hitting 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 operating boundaries of floating vehicles and boats for deployment and recovery; after the ship with a stern semi-open water tank completes the deployment and recovery operation, the watertight valve is closed to ensure the water tightness 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 It is a partially enlarged schematic diagram of the water curtain type unloading and wave-breaking device based on the stern springboard energy collection of the present invention when the stern springboard is in an open state;

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

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

[0023] Figure 5 It is a plan view of the energy collection bell mouth of the present invention.

[0024] In the figure, 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 in conjunction with 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 springboard energy collection, comprising a plurality of energy collecting bell mouths 2 arranged on the stern springboard 1, the stern springboard 1 is rectangular, the energy collecting bell mouths 2 are symmetrically arranged on the bottom surface of the stern springboard 1 along the central axis of the long side of the stern springboard 1, the energy collecting bell mouths 2 are arranged in an eight-shaped shape, and the distance between the two symmetrical energy collecting bell mouths 2 gradually decreases from the bow to the stern direction, so as to avoid the wake field of the energy collecting bell mouth 2 near the stern bow direction affecting the energy collecting bell mouth 2 far away from the stern, thereby affecting energy collection, and the end of the energy collecting bell mouth 2 near the stern is symmetrical to the bottom surface of the stern springboard 1 The end of the energy collection bell mouth 2 away from the stern has a certain angle with the bottom surface of the stern ramp 1. In this example, the angle is 30°, so that when the stern ramp 1 is opened, the seawater fluid caused by the navigation of the ship can easily enter from the side of the energy collection bell mouth 2 close to the stern, and reflect through the tilted structure away from the stern side so that the energy is gathered in the energy collection bell mouth 2, thereby increasing the pressure in the water pipeline 3, thereby increasing the water curtain injection speed, improving the energy capture effect, and taking into account the energy collection in two main scenarios: ship navigation and ship 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 a plurality of water delivery pipelines 3 arranged in the stern ramp 1, the water delivery 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, and is designed and formed integrally with the stern ramp 1, 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 one 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 designed and formed integrally with the stern ramp, so as to ensure the sealing of the connection between the stern ramp 1 and the vertical pipeline 32, and the vertical pipeline 32 is connected between the energy collection bell mouth 2 and the horizontal pipeline 31, and the energy collection bell mouth 1 collects the fluid and transports it to the horizontal pipeline 31 through the vertical pipeline 32 to realize energy transfer;

[0029] refer to Figure 2 , 4 As shown, an opening is provided at the top of the horizontal pipeline 31, and a single-way fan-shaped nozzle 4 is installed at the opening. The top of the single-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 single-way fan-shaped nozzle 4 faces the diffraction wave direction at a certain angle. The single-way fan-shaped nozzle 4 can spray a fan-shaped high-speed water flow, which can cover the ship width direction, 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 position of the single-phase fan-shaped nozzle 4 and at the connection position with the vertical pipeline 32, and the rest of the positions are sealed;

[0031] The vertical pipeline 32 is provided with a watertight valve 5, which is located close to 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 switching action in the pit. When the watertight valve 5 is closed, the channel between the energy collection bell mouth 2 and all the single-way fan-shaped nozzles 4 on the horizontal pipeline 31 can be cut off, thereby realizing the 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 recovering 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 pipeline 31 through the vertical pipeline 32 and the watertight valve 5. Under the pressure caused by the navigation of the ship, the seawater fluid is sprayed upward through the single-way 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 single-way fan-shaped nozzle 4 to form a water curtain; during the navigation of the ship and the stern ramp 1 hitting 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 operating boundary of the floating vehicle and boat dispatching and recovery; after the ship with the stern semi-open water tank completes the dispatching and recovery operation, the watertight valve 5 is closed to ensure the water tightness 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, 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 understood as limiting the present invention. The terms "first", "second", etc. are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. "Multiple" means two or more. "Installed", "connected", and "connected" 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 is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. 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 protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and equivalent changes made by using the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes 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 arranged 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) away from the horizontal pipeline (31) being connected to the energy collection bell mouth (2), a single-way fan-shaped nozzle (4) being arranged at the top of the horizontal pipeline (31), and a watertight valve (5) being arranged on the vertical pipeline (32).

2. According to claim 1, the water curtain type unloading and wave absorbing device based on stern ramp energy collection is characterized in that: The energy collection bell mouth (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).

3. According to claim 2, the water curtain type unloading and wave absorbing device based on stern ramp energy collection is characterized in that: The energy collection bell mouth (2) is arranged in an eight-shaped shape.

4. According to claim 3, the water curtain type unloading and wave absorbing device based on stern ramp energy collection is characterized in that: The distance between the two symmetrical energy collection horns (2) gradually decreases from the bow to the stern.

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 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).

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 horizontal pipeline (31) is symmetrically arranged inside the stern ramp (1) along the central axis of the long side of the stern ramp (1).

7. The water curtain type unloading and wave absorbing device based on stern ramp energy collection according to claim 6 is characterized in that: The horizontal pipeline (31) is arranged parallel to the long side of the stern ramp (1).

8. 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.

9. The water curtain type unloading and wave absorbing device based on stern ramp energy collection according to claim 8 is characterized in that: The top of the one-way fan-shaped nozzle (4) does not protrude from the upper surface of the stern ramp (1).

10. 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 recess (11), and the watertight valve (5) is arranged in the recess (11).

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