An anti-inversion sea passage well in an unmanned ship cabin

Abstract

The application discloses an unmanned ship cabin internal anti-backflow sea well, and relates to the technical field of unmanned ship sea wells, which comprises a ship body, an enclosed inner cabin is arranged at the upper portion of the ship body, an electric winch is arranged in the enclosed inner cabin, and a cable of the electric winch is connected with a detection device; a sea well pipeline for lowering the detection device is arranged in the bottom of the ship body; the detection device is wrapped with a device protection block, the device protection block is arranged in a conical shape, and the outer diameter of the device protection block is arranged in a gradually expanding shape downward; a pressure stabilizing fairlead is arranged at the middle and lower portions of the sea well pipeline, a guide hole matched with the cable is formed in the pressure stabilizing fairlead; and the lower end of the sea well pipeline is a conical fairlead pipe, and the caliber of the conical fairlead pipe is arranged in a gradually expanding shape downward. The electric winch is installed in the inner cabin, and the installation environment of the electric winch is optimized; through the combined action of the pressure stabilizing fairlead, the device protection block and the conical fairlead pipe, the internal liquid level of the sea well is stably controllable; and the backflow phenomenon of the sea well under high-speed navigation is solved.

Description

Technical Field

[0001] This invention relates to the field of unmanned surface vessel (USV) sea passage well technology, and particularly to an anti-backflow sea passage well inside the USV cabin. Background Technology

[0002] Currently, the demand for sea passage wells in small unmanned surface vessels (USVs) is mostly for carrying detection equipment. For example, an electrically controlled winch can be used to lower or raise temperature detection equipment through the sea passage well. The installation environment for this equipment has special requirements. Currently, most sea passage wells penetrate the hull and are located on the deck. The electrically controlled winch is also located on the deck of the USV, requiring complex waterproofing treatment to ensure the normal operation of the winch.

[0003] Currently, at cruising speeds, small unmanned surface vessels (USVs) inevitably experience significant backflow of seawater through the sea passage well. Due to this, the sea passage well must be located externally (on the upper deck) to prevent water ingress. This necessitates complex waterproofing of the electrically controlled winch, and its cables must run through the deck, affecting aesthetics and durability. Furthermore, placing the sea passage well on the deck makes the USV's deck appear unsightly. During high-speed navigation, the backflow from the sea passage well results in continuous seawater flow on the upper deck, potentially leading to other secondary risks. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-backflow sea passage well inside the unmanned surface vessel (USV), aiming to solve the technical problems in the prior art where backflow of sea passage wells requires the upper end of the sea passage well to be set outside the vessel, necessitating complex waterproofing treatment of the electrically controlled winch; and the backflow of sea passage wells causes seawater to constantly flow out of the upper deck surface, which may bring other secondary risks.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] An anti-backflow sea passage well for an unmanned surface vessel (USV) includes a hull. The upper part of the hull has a closed inner chamber located above the still waterline. An electric winch is installed inside the closed inner chamber, and the winch's cable is connected to a detection device. A sea passage well pipeline for lowering the detection device is located at the bottom of the hull. The upper end of the sea passage well pipeline connects to the closed inner chamber, and the lower end of the sea passage well pipeline penetrates the bottom of the hull. The detection device is encased in a protective block, which is conical in shape and has a gradually expanding outer diameter facing downwards. A pressure-stabilizing guide plate for the upper limit of the protective block is located in the lower middle part of the sea passage well pipeline. The pressure-stabilizing guide plate has guide holes adapted to the cable. The lower end of the sea passage well pipeline is a conical guide tube with a gradually expanding diameter facing downwards.

[0007] Preferably, the distance between the voltage stabilizing cable guide plate and the tapered cable guide tube is greater than the length of the equipment protection block.

[0008] Preferably, multiple annular turbulence grooves are spaced apart on the outer wall of the equipment protection block along its height direction.

[0009] Preferably, the equipment protection block includes two interlocking semi-conical blocks, each with a corresponding semi-circular hole on its interlocking side, and the detection device is installed within the interlocking area of ​​the two semi-circular holes.

[0010] Preferably, multiple sets of corresponding mounting holes are formed through the two semi-conical blocks, and grooves connecting the mounting holes are formed on the outer wall of the semi-conical blocks.

[0011] Preferably, a first annular guide cable round steel is fixed around the guide hole, and the cable moves up and down inside the first annular guide cable round steel, with the lower end of the first annular guide cable round steel protruding from the lower end of the guide hole.

[0012] Preferably, a second annular cable guide round steel is fixedly connected to the lower circumference of the tapered cable guide tube.

[0013] Preferably, the gap between the lower outer wall of the equipment protection block and the inner wall of the sea passage pipe is 5mm.

[0014] Preferably, the height difference between the enclosed inner chamber and the static waterline is 260mm.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are:

[0016] 1. The electric winch is installed inside the enclosed cabin, optimizing the installation environment. Through the combined action of the pressure stabilizing guide plate, equipment protection block, and conical guide pipe, the liquid level inside the sea passage well is kept stable and controllable. This solves the problem of backflow and flooding during high-speed navigation of the sea passage well. It also eliminates the need for the upper part of the sea passage well to be installed on the outer deck of the vessel. Because the upper part of the sea passage well is located inside the cabin, the environment of the equipment installation area at the upper part of the sea passage well is completely changed, providing a solid foundation for future improvements and expansion of unmanned surface vessel equipment.

[0017] 2. The detection equipment is connected to the electric winch inside the cabin via a cable. The electric winch provides power for lowering and retrieving the equipment. During this process, the protective block of the sea well equipment rises and falls along with the detection equipment, protecting the detection equipment from damage.

[0018] 3. When the unmanned surface vessel (USV) is traveling at high speed towards the target sea area, the electric winch retrieves the detection equipment and the protective block of the sea passage equipment to the storage position. At this time, the pressure-stabilizing guide cable plate restricts the up-and-down movement of the detection equipment and also stabilizes the water flow below the plate. The first guide cable round steel not only protects the cable from sharp angle damage but also guides the water flow downwards.

[0019] 4. The tapered guide cable plays a guiding role during the descent and recovery of the detection equipment. Simultaneously, when the unmanned surface vessel is traveling at high speed, it reduces the impact force of the high-speed water flow into the sea passage pipe, thus reducing impact pressure. The second ring-shaped guide cable round steel serves as both a guide cable and a protective cable.

[0020] 5. The design of the two semi-conical blocks and the mounting holes and grooves on them facilitates the installation of the detection equipment on the equipment protection block. The bolts can be inserted through the two corresponding mounting holes and tightened with nuts. The bolt heads and nuts are located in the grooves, which facilitates the fixation of the two semi-conical blocks and does not easily affect the movement of the equipment protection block.

[0021] 6. When the small boat is sailing at high speed, the turbulence groove on the equipment protection block stored in the sea passage well pipeline can reduce the upward water flow impact force in the sea passage well pipeline, increase the back pressure of the pipeline, reduce the height of the liquid level at the upper end of the pipeline, and further prevent the sea passage well from backflowing. Attached Figure Description

[0022] Figure 1 Schematic diagram of the layout of the anti-backflow sea passage well inside the unmanned surface vessel;

[0023] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A;

[0024] Figure 3 for Figure 2 A cross-sectional schematic diagram of the sea passage pipeline in the BB direction;

[0025] Figure 4 for Figure 2 A schematic diagram of the C-shaped tapered cable conduit;

[0026] Figure 5 This is a schematic diagram showing the direction of high-speed seawater flow;

[0027] Figure 6 A schematic diagram of the detection device for the equipment protection block;

[0028] Figure 7 This is a schematic diagram of the semi-cone block.

[0029] In the diagram, hull 1, enclosed inner compartment 2, electric winch 3, detection equipment 4, sea passage well pipeline 5, conical guide cable pipe 50, straight pipe 51, second annular guide cable round steel 52, pressure stabilizing guide cable plate 6, guide hole 60, first annular guide cable round steel 61, equipment protection block 7, annular turbulence groove 70, semi-conical block 71, semi-circular hole 72, mounting hole 73, groove 74. Detailed Implementation

[0030] The invention will now be further described with reference to the accompanying drawings.

[0031] The orientations mentioned in this specification are based on the orientation of the anti-backflow sea passage well inside the unmanned surface vessel of the present invention during normal operation, and do not limit the orientation during storage and transportation. They only represent relative positional relationships and do not represent absolute positional relationships.

[0032] like Figures 1 to 7 As shown, an anti-backflow sea passage well inside an unmanned surface vessel (USV) includes a hull 1. The upper part of the hull 1 has a closed inner chamber 2 located above the still waterline. An electric winch 3 is installed inside the closed inner chamber 2, and the cable of the electric winch 3 is connected to a detection device 4. A sea passage well pipe 5 for lowering the detection device 4 is located inside the bottom of the hull 1. The upper end of the sea passage well pipe 5 connects to the closed inner chamber 2, and the lower end of the sea passage well pipe 5 penetrates the bottom of the hull 1. The detection device 4 is encased in a protective block 7, and the detection device 4 is installed inside or at the lower end of the protective block 7. The protective block 7 is conical in shape, with its outer diameter gradually widening downwards. A voltage-stabilizing guide plate 6 for upper limit positioning of the protective block 7 is located in the lower middle part of the sea passage well pipe 5. The maximum upward position of the protective block 7 is close to the bottom of the voltage-stabilizing guide plate 6. Preferably, the outer edge of the voltage-stabilizing guide plate 6 is welded to the inner wall of the sea passage well pipe 5. The pressure-stabilizing guide plate 6 has guide holes 60 adapted to the cable. The lower end of the sea passage pipe 5 is a tapered guide pipe 50, which is arranged with its diameter gradually expanding downwards. The sea passage pipe 5 includes a straight pipe 51 and a tapered guide pipe 50 connecting the lower end of the straight pipe 51. The upper end of the straight pipe 51 connects to the enclosed inner compartment 2, and the inner diameter of the straight pipe 51 is equal to the inner diameter of the upper end of the tapered guide pipe 50.

[0033] The electric winch 3 is installed inside the enclosed inner compartment 2, optimizing the installation environment. Through the combined action of the pressure-stabilizing guide plate 6, the equipment protection block 7, and the conical guide pipe 50, the internal liquid level of the sea passage well is stabilized and controllable, resolving the backflow phenomenon during high-speed navigation and eliminating the need for the upper part of the sea passage well to be installed on the outer deck. Because the upper part of the sea passage well is located inside the compartment, the environment of the equipment installation area at the upper part of the sea passage well is completely changed, providing a solid foundation for future improvements and expansions of the unmanned surface vessel (USV). The detection equipment 4 is connected to the electric winch 3 inside the compartment via a cable. The electric winch 3 provides power for lowering and retrieving the equipment. During this process, the sea passage well equipment protection block 7 rises and falls along with the detection equipment 4, protecting it from damage and also acting as a counterweight. When the USV travels at high speed to its destination sea area, the electric winch 3 retrieves the detection equipment 4 and the sea passage well equipment protection block 7 to their storage location, which is below the pressure-stabilizing guide plate 6. At this time, the pressure-stabilizing guide plate 6 limits the equipment protection block 7, thereby restricting the vertical movement of the detection equipment 4. Simultaneously, the pressure-stabilizing guide plate 6 stabilizes the water flow below it. The tapered guide pipe 50 guides the detection equipment 4 during its descent and retrieval. Furthermore, when the unmanned surface vessel is traveling at high speed, it reduces the impact force of the high-speed water flow into the sea passage pipe 5, thus reducing the impact pressure.

[0034] The distance between the voltage-stabilizing cable plate 6 and the tapered cable tube 50 is greater than the length of the equipment protection block 7. When the unmanned surface vessel is traveling at high speed to its destination sea area, the equipment protection block 7 is completely stored between the voltage-stabilizing cable plate 6 and the tapered cable tube 50, improving the voltage stabilization effect of the equipment protection block 7.

[0035] The outer wall of the equipment protection block 7 is provided with multiple annular turbulence grooves 70 spaced apart along its height. When the small boat is sailing at high speed, the annular turbulence grooves 70 on the equipment protection block 7 stored in the sea passage well pipe can reduce the upward water flow impact force in the sea passage well pipe, increase the back pressure of the pipe, reduce the height of the liquid level at the upper end of the pipe, and further prevent backflow of water from the sea passage well.

[0036] The guide hole 60 is fixedly connected to a first annular guide steel bar 61. The inner diameter of the first annular guide steel bar 61 is smaller than the upper outer diameter of the equipment protection block 7, preventing the equipment protection block 7 from passing through the first annular guide steel bar to the top of the pressure stabilizing guide cable plate 6. The cable moves up and down within the first annular guide steel bar 61, with the lower end of the first annular guide steel bar 61 protruding from the lower end of the guide hole 60. When the unmanned surface vessel travels at high speed to the target sea area, the electric winch 3 retrieves the detection equipment 4 and the sea passage well equipment protection block 7 to their storage position. At this time, the pressure stabilizing guide cable plate restricts the up and down movement of the detection equipment 4 and stabilizes the water flow below the plate. The first guide steel bar not only protects the cable from sharp angle damage but also, protruding downwards from the lower end of the guide hole 60, guides the water flow that enters below the pressure stabilizing guide cable plate 6 through the gap between the equipment protection block 7 and the sea passage well pipe downwards.

[0037] The lower circumference of the tapered cable guide tube 50 is fixedly connected to a second annular cable guide round steel bar 52. The second annular cable guide round steel bar 52 serves to guide the cable and protect the cable rope.

[0038] Furthermore, the equipment protection block 7 includes two interlocking semi-conical blocks 71, each of which has a corresponding semi-circular hole 72 on its interlocking side, and the detection device 4 is installed in the interlocking area of ​​the two semi-circular holes 72.

[0039] Furthermore, multiple sets of corresponding mounting holes 73 are provided through the two semi-conical blocks 71, and grooves 74 communicating with the mounting holes 73 are provided on the outer wall of the semi-conical blocks 71. The arrangement of the two semi-conical blocks 71 and their mounting holes 73 and grooves 74 facilitates the installation of the detection device 4 on the equipment protection block 7. The bolt can be passed through the two corresponding mounting holes 73 and locked with a nut. The bolt head and nut are located in the grooves 74, which does not affect the movement of the equipment protection block 7.

[0040] In this invention, the gap between the lower outer wall of the equipment protection block 7 and the inner wall of the sea passage pipe 5 is 5mm, and the height difference between the enclosed inner chamber 2 and the static waterline is 260mm. When the unmanned surface vessel is sailing at high speed towards the target sea area, the electric winch 3, through the limiting device, houses the detection equipment 4 and the equipment protection block 7 wrapped around the detection equipment 4 into the straight pipe 51 between the pressure stabilizing guide cable plate 6 and the tapered guide cable pipe 50. At this time, the gap between the equipment protection block 7 and the sea passage pipe 5 is about 5mm. When the unmanned surface vessel is traveling at a speed of 10kn, the liquid level in the sea passage pipe 5 is higher than the static waterline of the unmanned surface vessel and the height difference is ≤60mm. In sea state 3, after the water flows into the sea passage pipe 5, when it passes through the equipment protection block 7, the water flow impact force is reduced due to the small gap between the equipment protection block 7 and the sea passage pipe 5. The water flow through the equipment protection block 7 is further reduced by the action of the annular turbulence groove 70. Then, the water flow is further reduced by the obstruction of the pressure stabilizing guide plate 6. A part of the water flow flows downward and cancels the pressure of the upward water flow, further reducing the impact force of the water flow and stabilizing the water flow pressure. With the combined pressure stabilizing effect of the tapered cable guide 50 at the lower end of the sea passage well, the sea passage well equipment protection block 7, and the sea passage well pressure stabilizing cable plate 6, the liquid level inside the sea passage well will not fluctuate violently due to the rise and fall of the waves. This ensures that the upper limit of the liquid level in the pipe is always 200mm away from the sealed inner tank 2, generating a strong pressure stabilizing state and achieving controllable liquid level height inside the pipe. This prevents backflow into the inner tank due to high-speed navigation. The equipment protection block 7, while protecting the detection equipment 4 from damage due to collisions in the water, also works with the sea passage well pressure stabilizing cable plate 6 to ensure that the detection equipment 4 does not move up and down due to turbulence. At this point, the detection equipment 4 has been retrieved into the sea passage well pipe between the pressure stabilizing cable plate 6 and the tapered cable guide 50. The tapered cable guide 50 prevents damage to the detection equipment 4 from marine debris during navigation.

[0041] When the unmanned surface vessel (USV) reaches the target sea area and begins its reconnaissance operation, it is either floating or idling at 1-2 knots on the sea surface, which can be considered as a stationary state. The electric winch 3 lowers the detection equipment 4. The equipment 4, along with its own weight and the equipment protection block 7, acts as a counterweight, allowing it to be lowered to the designated depth via the tapered guide cable 50 at the lower end of the sea passage well, completing the reconnaissance mission. At this point, the equipment protection block 7 has detached from the sea passage well, and the strong pressure stabilizing effect of the well disappears. However, the pressure stabilizing guide cable 6 itself can be considered as a weak pressure stabilizing state, preventing surges from entering the interior of the vessel in sea state 3 while it is floating. After the reconnaissance mission is completed, the electric winch 3 retrieves the detection equipment 4. As the detection equipment 4 approaches the hull 1, the equipment protection block 7 first contacts the tapered guide cable 50 at the lower end of the sea passage well, preventing damage to the detection equipment 4 due to collision during retrieval. Working in conjunction with the tapered guide cable 50, the equipment protection block 7 smoothly enters the straight pipe 51 inside the sea passage well pipeline 5, reaching the retrieval position.

[0042] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A backflow prevention and sea-access well inside an unmanned surface vessel, characterized in that, The vessel includes a hull, the upper part of which has a closed inner compartment located above the still waterline. An electric winch is installed inside the closed inner compartment, and the winch's cable connects to a detection device. A sea passage pipe for lowering the detection device is located at the bottom of the hull. The upper end of the sea passage pipe connects to the closed inner compartment, and the lower end of the sea passage pipe penetrates the bottom of the hull. The detection device is encased in a protective block, which is conical in shape and gradually expands downwards. A pressure-stabilizing guide plate for the upper limit of the protective block is located in the lower middle part of the sea passage pipe, and the pressure-stabilizing guide plate has guide holes adapted to the cable. The lower end of the sea passage pipe is a conical guide tube with a gradually expanding downward-facing diameter. Multiple annular turbulence grooves are spaced apart along the height direction on the outer wall of the equipment protection block.

2. The anti-backflow well inside the unmanned surface vessel as described in claim 1, characterized in that, The distance between the voltage stabilizing cable plate and the tapered cable tube is greater than the length of the equipment protection block.

3. The anti-backflow well for unmanned surface vessels as described in claim 1, characterized in that, The device protection block includes two interlocking semi-conical blocks, each with a corresponding semi-circular hole on its interlocking side. The detection device is installed within the interlocking area of ​​the two semi-circular holes.

4. The anti-backflow well inside the unmanned surface vessel as described in claim 3, characterized in that, Multiple sets of corresponding mounting holes are provided through the two semi-conical blocks, and grooves connecting the mounting holes are provided on the outer wall of the semi-conical blocks.

5. The anti-backflow well inside the unmanned surface vessel as described in claim 1, characterized in that, A first annular guide steel bar is fixed around the guide hole. The cable moves up and down inside the first annular guide steel bar, and the lower end of the first annular guide steel bar protrudes from the lower end of the guide hole.

6. The anti-backflow sea passage well inside the unmanned surface vessel as described in claim 1, characterized in that, A second ring-shaped cable guide round steel is fixed around the lower end of the tapered cable guide tube.

7. The anti-backflow well inside the unmanned surface vessel as described in claim 1, characterized in that, The gap between the lower outer wall of the equipment protection block and the inner wall of the sea well pipeline is 5mm.

8. A backflow prevention and sea-access well inside an unmanned surface vessel as described in any one of claims 1 to 7, characterized in that, The height difference between the enclosed inner chamber and the static waterline is 260mm.

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