Moon pool structure of polar scientific investigation ship

Abstract

The invention relates to the technical field of ships, in particular to a moon pool structure of a polar scientific investigation ship, which comprises a moon pool, the moon pool is fixedly connected with a plurality of reinforcing pieces, the moon pool is provided with a first shell, the first shell is provided with a filter screen and a heating piece, the first shell is fixedly connected with and communicated with a second shell, and the second shell is provided with a filter screen and a heating piece. A filter screen is arranged on the first shell and used for filtering seawater entering the second shell, the second shell is fixedly connected and communicated with a guide pipe, a sliding push rod is arranged on the guide pipe in a sealing and sliding mode, the guide pipe and the sliding push rod are each provided with a round hole provided with a one-way valve, and the second shell is fixedly connected with a first power piece. Seawater in the moon pool is driven to rotate slowly through work of the first power part, surface shear flow caused by rotation can destroy a boundary layer formed under a still water condition and delay formation of a stable low-temperature interface required by ice crystal nucleation, and stability and safety of lowering test equipment are ensured by matching with collection of crushed ice by a filter screen in the first shell.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to a moonpool structure of a polar research ship. Background Art

[0002] Moonpools are often provided on research ships. The moonpools are connected to seawater and are used as access channels for the lowering and recovery of research equipment. When operating in an extremely low-temperature environment such as the polar region, the low-temperature environment easily causes the water body inside the moonpool to freeze. This phenomenon not only directly affects the normal deployment and recovery operations of underwater equipment such as winches and research equipment, but also, as the ice layer continuously accumulates, it will cause the equipment to be blocked in its movement, greatly increasing the operation difficulty.

[0003] Even more seriously, the formation and accumulation of ice layers will bring a series of safety hazards. First, the formed ice body will collide with sensors or other precision instruments that are in operation, causing physical damage to these expensive and important equipment; second, before subsequent tests are carried out, ice-breaking operations must be performed first to remove obstacles. However, if the ice slag generated during the ice-breaking process is not thoroughly cleaned, it will also pose a threat to the stability and safety of the equipment being tested. Summary of the Invention

[0004] In order to overcome the problems proposed in the above background art, the present invention provides a moonpool structure of a polar research ship.

[0005] The technical solution is as follows: A moonpool structure of a polar research ship includes a moonpool. A plurality of reinforcing members are fixedly connected to the moonpool. A first housing is arranged inside the moonpool. A filter screen and a heating member are arranged inside the first housing. The first housing is fixedly connected and communicated with a second housing. The filter screen on the first housing is used for filtering the seawater entering the second housing. The second housing is fixedly connected and communicated with a conduit. A sliding push rod is hermetically slidably arranged in the conduit. Both the conduit and the sliding push rod are provided with round holes for installing one-way valves. A first power member is fixedly connected to the second housing. The first power member is used for driving the sliding push rod to move. When the sliding push rod moves, it drives the seawater in the moonpool to flow.

[0006] More preferably, it further includes a first sliding plate. The first sliding plate is slidably arranged in the moonpool. The first sliding plate is slidably connected to the first housing. The first sliding plate is used for blocking the first housing. A second power member is fixedly connected to the moonpool. The second power member is used for driving the first connecting rod to move. The first connecting rod is fixedly connected to the first sliding plate.

[0007] More preferably, both the first housing and the second housing are slidably connected to the moonpool. The first connecting rod is fixedly connected with a third power member. The first housing is fixedly connected with a second connecting rod. The second connecting rod penetrates through the first sliding plate and is slidably connected therewith. The third power member is used to drive the second connecting rod to move.

[0008] More preferably, a plurality of baffles are fixedly connected in the moonpool. Inside the baffles is lower than outside in the vertical direction, and all the baffles are located below the second housing.

[0009] More preferably, the moonpool is provided with a plurality of grooves, and the grooves are connected to the lower side edges of adjacent baffles. The grooves are used to guide seawater to flow downward.

[0010] More preferably, a plurality of second sliding plates are slidably arranged in the moonpool. The number of the second sliding plates is the same as that of the baffles, and the plurality of baffles and the plurality of second sliding plates are arranged in a staggered manner.

[0011] More preferably, the second sliding plate is provided with a plurality of through holes, and the through holes are opposite to adjacent baffles.

[0012] More preferably, the baffle is fixedly connected with a fixed shell. A sliding rod is hermetically slidably arranged in the fixed shell. The fixed shell is filled with a liquid medium. The sliding rod is fixedly connected with a fixed ring, and the fixed ring is provided with liquid guiding holes.

[0013] More preferably, an elastic member is fixedly connected between the fixed ring and the adjacent fixed shell.

[0014] More preferably, a sliding plug is slidably arranged on the fixed ring, and the sliding plug is located in the liquid guiding hole of the adjacent fixed ring.

[0015] Compared with the prior art, the present invention has the following advantages: Through the operation of the first power member, the seawater in the moonpool is driven to slowly rotate. The surface shear flow caused by the rotation can destroy the boundary layer formed under static water conditions, delay the formation of a stable low-temperature interface required for ice crystal nucleation, and cooperate with the filter screen in the first housing to collect broken ice, ensuring the stability and safety of the lowered test equipment; Through the driving of the second power member and the third power member, the first housing is located near the seawater surface, facilitating the first housing to accurately collect broken ice in the seawater in the moonpool; Through the diversion of seawater by the baffles and the grooves, simulating the principle of a Tesla valve to weaken the waves of seawater; Through the second sliding plates fluctuating together with the seawater waves, further consuming the fluctuating trend of the seawater, ensuring the stability of the seawater in the moonpool and creating a stable working environment for the test device; Utilizing the resistance suffered by the fixed ring when moving in the fixed shell filled with the liquid medium to further weaken the wave trend of the seawater, ensuring the safety of the test equipment. Brief Description of the Drawings

[0016] Figure 1 Schematic three-dimensional structure diagram of the present invention; Figure 2 Schematic three-dimensional structure diagram at the first housing and the second housing of the present invention; Figure 3 Cross-sectional view at the first housing and the second housing of the present invention; Figure 4 Schematic three-dimensional structure diagram at the sliding push rod and the first power member of the present invention; Figure 5 Cross-sectional view at the second sliding plate and the fixed housing of the present invention; Figure 6 Cross-sectional view at the fixed housing and the fixed ring of the present invention.

[0017] Wherein: 1, moon pool; 2, reinforcing member; 3, baffle; 4, first housing; 5, second housing; 6, conduit; 7, sliding push rod; 8, first power member; 9, first sliding plate; 10, second power member; 11, first connecting rod; 12, third power member; 13, second connecting rod; 14, groove; 15, second sliding plate; 16, through hole; 17, fixed housing; 18, sliding rod; 19, fixed ring; 20, elastic member; 21, sliding plug. Detailed Description of the Invention

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment 1: A moon pool structure of a polar research ship, as Figures 1 - 4 shown, including a moon pool 1, a plurality of reinforcing members 2 are fixedly connected to the moon pool 1, a first housing 4 is arranged in the moon pool 1, a filter screen and a heating member are arranged in the first housing 4, the first housing 4 is fixedly connected and communicated with a second housing 5, a filter screen on the first housing 4 is used for filtering seawater entering the second housing 5, the second housing 5 is fixedly connected and communicated with a conduit 6, a sliding push rod 7 is hermetically slidably arranged in the conduit 6, round holes for installing one-way valves are arranged on both the conduit 6 and the sliding push rod 7, a first power member 8 is fixedly connected to the second housing 5, the first power member 8 is used for driving the sliding push rod 7 to move, and when the sliding push rod 7 moves, it drives the seawater in the moon pool 1 to flow.

[0020] In the above solution, the moonpool 1 is installed in a ship. In the actual environment, an electrically controlled closing door is provided on the lower side of the moonpool 1 to block the lower part of the moonpool 1. In the initial state, the closing door on the moonpool 1 blocks the middle passage. The electrical components (heating element, first power element 8) on this device are electrically connected to a remote control terminal through the Internet of Things. The first power element 8 is an electric push rod. The inner side of the moonpool 1 is flat, and the surface of the moonpool 1 is coated with an anti-corrosion material. The filter screen on the first housing 4 divides the chamber in the middle into two. The opening of the inner chamber faces downward, and the opening of the outer chamber faces upward. The inner chamber on the first housing 4 communicates with the second housing 5. The filter screen on the first housing 4 is used to intercept broken ice in seawater. There are two conduits 6, sliding push rods 7, and first power elements 8 that are centrosymmetric (this quantity is the quantity shown in the figure, and its actual quantity can be set accordingly according to actual needs. The same applies to the following quantity descriptions). The flow direction of the check valve on the sliding push rod 7 is the same as the flow direction of the check valve on the adjacent conduit 6. The check valve on the conduit 6 can only allow seawater to flow out from the inside to the outside of it.

[0021] Specific working principle: After the ship is assembled and installed, the moonpool 1 is located in the ship. When scientific research operations need to be carried out, first start the closing door on the moonpool 1 through the remote control terminal to connect the middle of the moonpool 1 with seawater. At this time, the liquid level of the seawater in the moonpool 1 is higher than the upper surface of the first housing 4, and the seawater fills the first housing 4, the second housing 5, and the conduit 6. First, perform ice-breaking operations on the ice layer in the moonpool 1, and then place the scientific research equipment into the moonpool 1 through an existing suspension machine. During the process of the scientific research equipment taking samples and testing at a specified depth in seawater, the remote control terminal simultaneously starts two first power elements 8 and the heating element to work together. Among them, the first power element 8 works to drive the adjacent sliding push rod 7 to move reciprocally. The reciprocating work of the sliding push rod 7 causes the seawater in the conduit 6 to gradually drain from the inside through the check valve. During the reciprocating movement of the sliding push rod 7, the seawater in the upper part of the moonpool 1 enters the conduit 6 through the chamber of the first housing 4 and the second housing 5, forming a circulating flow of seawater. At the same time, under the guiding action of the two conduits 6, the seawater in the upper part of the moonpool 1 slowly rotates. At this time, the surface shear flow caused by the rotation can destroy the laminar boundary layer formed under static water conditions and delay the formation of a stable low-temperature interface required for ice crystal nucleation.

[0022] During the process of the seawater circulating and flowing in the moonpool 1, the flow rate of the seawater is affected by the working frequency of the sliding push rod 7. During the rotational flow of the seawater, the seawater carries broken ice and aggregates near the filter screen of the first housing 4. At this time, the heating element on the first housing 4 works to heat this area and melt the broken ice to avoid the broken ice affecting the sampling and test results of the scientific research equipment.

[0023] Embodiment 2: On the basis of Embodiment 1, as Figures 1 - 4As shown in the figure, it further includes a first sliding plate 9. The first sliding plate 9 is slidably arranged in the moon pool 1. The first sliding plate 9 is slidably connected to the first housing 4. The first sliding plate 9 is used to block the first housing 4. The moon pool 1 is fixedly connected with a second power member 10. The second power member 10 is used to drive the first connecting rod 11 to move. The first connecting rod 11 is fixedly connected to the first sliding plate 9. Both the first housing 4 and the second housing 5 are slidably connected to the moon pool 1. The first connecting rod 11 is fixedly connected with a third power member 12. The first housing 4 is fixedly connected with a second connecting rod 13. The second connecting rod 13 penetrates through the first sliding plate 9 and is slidably connected to it. The third power member 12 is used to drive the second connecting rod 13 to move.

[0024] In the above solution, both the second power member 10 and the third power member 12 are electric push rods. Both the second power member 10 and the third power member 12 are electrically connected to the remote control terminal through the Internet of Things. The numbers of the second power member 10, the first connecting rod 11, the third power member 12, and the second connecting rod 13 are all four and are circumferentially equally spaced. The second power member 10 is used to control the first sliding plate 9 to move up and down. The third power member 12 is used to control the first housing 4 to move up and down, so that the upper surface of the first housing 4 is located below the sea water surface in the moon pool 1, improving the applicability of the device. In the initial state, the first housing 4 and the second housing 5 and other connected parts are located above the sea water in the moon pool 1, reducing the erosion of sea water on these parts and extending the service life of the device.

[0025] Specific working principle: After breaking the ice layer of the sea water in the moon pool 1, the second power member 10 is controlled to work through the remote control terminal. The second power member 10 controls the first housing 4, the second housing 5, the conduit 6, and the first sliding plate 9 to move down into the sea water together through the first connecting rod 11. When the upper surface of the first sliding plate 9 is below the sea water level, the second power member 10 stops working. Subsequently, the third power member 12, the first power member 8, and the heating member are controlled to work together through the remote control terminal. Among them, when the third power member 12 works, it drives the first housing 4 and the second housing 5 to move downward through the second connecting rod 13, so that the first sliding plate 9 releases the blockage of the first housing 4. Subsequently, the third power member 12 stops working. At this time, the upper surface of the first housing 4 is located below the sea water level, and the first power member 8 and the heating member work to repeat the above operation of guiding the sea water flow. After the set working time, the remote control terminal controls the third power member 12 to work in the reverse direction to reset, so that the first sliding plate 9 blocks the first housing 4 again, and at this time the broken ice is collected in the first housing 4. Subsequently, the heating member on the first housing 4 works to heat the broken ice. Then, the first power member 8 and the heating member are turned off through the remote control terminal. Subsequently, the device is intermittently started for ice breaking and collection operations, reducing the energy consumption of the device.

[0026] Embodiment 3: On the basis of Embodiment 2, as Figure 2 、 Figure 3 andFigure 5 As shown in the figure, a plurality of baffles 3 are fixedly connected inside the moonpool 1. The inner side of the baffle 3 is lower than its outer side in the vertical direction, and all the baffles 3 are located below the second housing 5; the moonpool 1 is provided with a plurality of grooves 14, and the grooves 14 are connected to the lower side edges of adjacent baffles 3, and the grooves 14 are used to guide the seawater to flow downward.

[0027] In the above solution, both the baffle 3 and the groove 14 have three that are evenly distributed. The three baffles 3 are located below the second housing 5, and the cross-section of the baffle 3 is inclined. When the seawave is transmitted into the moonpool 1, the baffle 3 blocks the seawave, weakening the fluctuation amplitude of the seawater in the moonpool 1. At the same time, when the baffle 3 blocks the seawater, affected by the inclination of the baffle 3, the blocked seawater enters the adjacent groove 14 under the guiding action, and the subsequent seawater flows along the groove 14, causing the seawater to flow obliquely downward and counteracting the seawave, further weakening the seawater fluctuation, ensuring that the seawater in the moonpool 1 remains relatively stable, and further ensuring the stability of the sampling and testing process of the scientific research equipment.

[0028] Embodiment 4: On the basis of Embodiment 3, as Figure 2 and Figure 5 shown in the figure, a plurality of second sliding plates 15 are slidably arranged inside the moonpool 1. The number of the second sliding plates 15 is the same as the number of the baffles 3, and the plurality of baffles 3 and the plurality of second sliding plates 15 are staggeredly distributed; the second sliding plates 15 are provided with a plurality of through holes 16, and the through holes 16 are opposite to the adjacent baffles 3.

[0029] In the above solution, there are three second sliding plates 15 that are evenly distributed. The cross-sections of the three second sliding plates 15 gradually become smaller from top to bottom, and the three second sliding plates 15 are used to block the waves in the seawater step by step, achieving a trend of gradually attenuating the seawater fluctuation.

[0030] As Figure 2 、 Figure 5 and Figure 6 shown in the figure, a fixed shell 17 is fixedly connected to the baffle 3. A sliding rod 18 is hermetically slidably arranged inside the fixed shell 17. The fixed shell 17 is filled with a liquid medium. A fixed ring 19 is fixedly connected to the sliding rod 18, and the fixed ring 19 is provided with a liquid guiding hole; an elastic member 20 is fixedly connected between the fixed ring 19 and the adjacent fixed shell 17; a sliding plug 21 is slidably arranged on the fixed ring 19, and the sliding plug 21 is located in the liquid guiding hole of the adjacent fixed ring 19.

[0031] In the above solution, there are twelve fixed shells 17. Among them, four fixed shells 17 are circumferentially and equidistantly distributed on a single baffle 3. The liquid medium in the fixed shell 17 is antifreeze, the elastic member 20 is a spring, the lower part of the sliding plug 21 is a variable diameter section, and the cross-section of the variable diameter section on the sliding plug 21 gradually becomes larger from top to bottom.

[0032] Specific working principle: During the process of seawater waves being transmitted into the moonpool 1, the seawater waves first impact the lowermost second sliding plate 15, causing the lowermost second sliding plate 15, the lowermost sliding rod 18, and the fixing ring 19 to move upward together. However, due to the action of the liquid in the fixed housing 17, the liquid medium flows through the liquid guiding holes on the fixing ring 19. During this process, the moving resistance received by the fixing ring 19 is used to consume the wave energy of the seawater, and the three second sliding plates 15 consume the wave energy of the seawater in sequence.

[0033] During the upward movement of the fixing ring 19, the fixing ring 19 simultaneously compresses the adjacent elastic members 20, converting part of the wave energy of the seawater into the elastic potential energy of the elastic members 20, and part of the seawater flows into the adjacent baffle 3 through the through holes 16. Subsequently, under the guiding action of the baffle 3 and the groove 14, the seawater repeats the operation of consuming the wave energy of the seawater.

[0034] When the seawater fluctuates downward, due to the elastic action of the elastic members 20, the fixing ring 19 and the sliding rod 18 move downward rapidly. Due to the obstructive action of the liquid in the fixed housing 17, the sliding plug 21 moves upward relative to the adjacent fixing ring 19, causing the variable diameter end of the sliding plug 21 to be located in the liquid guiding hole of the fixing ring 19. At this time, the flow cross-section of the liquid becomes smaller, slowing down the downward movement speed of the fixing ring 19, the sliding rod 18, and the second sliding plate 15, consuming the wave energy of the downward fluctuating seawater, further ensuring the stability of the seawater in the moonpool 1, reducing the situation of the scientific research equipment being lowered colliding with the inner wall of the moonpool 1, and extending the service life of this device.

[0035] It should be noted that the above preferred embodiments are only used to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A moon pool structure for a polar research vessel, characterized in that: The invention comprises a moon pool (1), wherein the moon pool (1) is fixedly connected to a plurality of reinforcement members (2), a first shell (4) is arranged in the moon pool (1), a filter screen and a heating member are arranged in the first shell (4), the first shell (4) is fixedly connected to and communicated with a second shell (5), the filter screen on the first shell (4) is used to filter seawater entering the second shell (5), the second shell (5) is fixedly connected to and communicated with a conduit (6), a sliding push rod (7) is sealed and slidably arranged in the conduit (6), the conduit (6) and the sliding push rod (7) are both provided with a circular hole for installing a one-way valve, the second shell (5) is fixedly connected to a first power member (8), the first power member (8) is used to drive the sliding push rod (7) to move, and when the sliding push rod (7) moves, the seawater in the moon pool (1) is driven to flow.

2. The moon pool structure of a polar research vessel according to claim 1, characterized in that: The invention also comprises a first sliding plate (9), the first sliding plate (9) being slidably disposed in the moon pool (1), the first sliding plate (9) being slidably connected to the first shell (4), the first sliding plate (9) being used to seal the first shell (4), the moon pool (1) being fixedly connected to a second power member (10), the second power member (10) being used to drive the first connecting rod (11) to move, the first connecting rod (11) being fixedly connected to the first sliding plate (9).

3. The moon pool structure of a polar research vessel according to claim 2, characterized in that: The first shell (4) and the second shell (5) are both slidably connected to the moon pool (1); the first connecting rod (11) is fixedly connected to a third power member (12); the first shell (4) is fixedly connected to a second connecting rod (13); the second connecting rod (13) penetrates the first sliding plate (9) and is slidably connected thereto; the third power member (12) is used to drive the second connecting rod (13) to move.

4. The moon pool structure of a polar research vessel according to claim 3, characterized in that: A plurality of baffles (3) are fixedly connected inside the moon pool (1), the inner side of the baffles (3) being lower than the outer side in the vertical direction, and all the baffles (3) are located below the second shell (5).

5. The moon pool structure of a polar research vessel according to claim 4, characterized in that: The moon pool (1) is provided with a plurality of grooves (14), wherein the grooves (14) are connected to the lower edges of adjacent baffles (3), and the grooves (14) are used to guide seawater to flow downwards.

6. The moon pool structure of a polar research vessel according to claim 5, characterized in that: A plurality of second sliding plates (15) are slidably arranged in the moon pool (1), the number of the second sliding plates (15) is the same as the number of the baffles (3), and the plurality of baffles (3) and the plurality of second sliding plates (15) are arranged in a staggered manner.

7. The moon pool structure of a polar research vessel according to claim 6, characterized in that: The second sliding plate (15) is provided with a plurality of through holes (16), and the through holes (16) are directly opposite to the adjacent baffle plate (3).

8. The moon pool structure of a polar research vessel according to claim 7, characterized in that: The baffle (3) is fixedly connected to a fixed shell (17), a sliding rod (18) is sealingly and slidably arranged inside the fixed shell (17), the fixed shell (17) is filled with a liquid medium, the sliding rod (18) is fixedly connected to a fixed ring (19), and the fixed ring (19) is provided with a liquid guide hole.

9. The moon pool structure of a polar research vessel according to claim 8, characterized in that: An elastic member (20) is fixedly connected between the fixing ring (19) and the adjacent fixing shell (17).

10. The moon pool structure of a polar research vessel according to claim 9, characterized in that: The fixing ring (19) is slidably provided with a sliding plug (21), and the sliding plug (21) is located in a liquid guide hole adjacent to the fixing ring (19).

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